diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/8250_pnp.c | 24 | ||||
| -rw-r--r-- | drivers/serial/Kconfig | 56 | ||||
| -rw-r--r-- | drivers/serial/Makefile | 4 | ||||
| -rw-r--r-- | drivers/serial/atmel_serial.c | 17 | ||||
| -rw-r--r-- | drivers/serial/cpm_uart/cpm_uart.h | 11 | ||||
| -rw-r--r-- | drivers/serial/cpm_uart/cpm_uart_core.c | 393 | ||||
| -rw-r--r-- | drivers/serial/cpm_uart/cpm_uart_cpm1.c | 170 | ||||
| -rw-r--r-- | drivers/serial/cpm_uart/cpm_uart_cpm1.h | 12 | ||||
| -rw-r--r-- | drivers/serial/cpm_uart/cpm_uart_cpm2.c | 283 | ||||
| -rw-r--r-- | drivers/serial/cpm_uart/cpm_uart_cpm2.h | 12 | ||||
| -rw-r--r-- | drivers/serial/imx.c | 318 | ||||
| -rw-r--r-- | drivers/serial/of_serial.c | 2 | ||||
| -rw-r--r-- | drivers/serial/s3c2400.c | 106 | ||||
| -rw-r--r-- | drivers/serial/s3c2410.c | 1860 | ||||
| -rw-r--r-- | drivers/serial/s3c2412.c | 151 | ||||
| -rw-r--r-- | drivers/serial/s3c2440.c | 181 | ||||
| -rw-r--r-- | drivers/serial/samsung.c | 1317 | ||||
| -rw-r--r-- | drivers/serial/samsung.h | 102 |
18 files changed, 2186 insertions, 2833 deletions
diff --git a/drivers/serial/8250_pnp.c b/drivers/serial/8250_pnp.c index 97c68d021d28..638b68649e79 100644 --- a/drivers/serial/8250_pnp.c +++ b/drivers/serial/8250_pnp.c @@ -383,21 +383,14 @@ static int __devinit check_name(char *name) return 0; } -static int __devinit check_resources(struct pnp_option *option) +static int __devinit check_resources(struct pnp_dev *dev) { - struct pnp_option *tmp; - if (!option) - return 0; + resource_size_t base[] = {0x2f8, 0x3f8, 0x2e8, 0x3e8}; + int i; - for (tmp = option; tmp; tmp = tmp->next) { - struct pnp_port *port; - for (port = tmp->port; port; port = port->next) - if ((port->size == 8) && - ((port->min == 0x2f8) || - (port->min == 0x3f8) || - (port->min == 0x2e8) || - (port->min == 0x3e8))) - return 1; + for (i = 0; i < ARRAY_SIZE(base); i++) { + if (pnp_possible_config(dev, IORESOURCE_IO, base[i], 8)) + return 1; } return 0; @@ -420,10 +413,7 @@ static int __devinit serial_pnp_guess_board(struct pnp_dev *dev, int *flags) (dev->card && check_name(dev->card->name)))) return -ENODEV; - if (check_resources(dev->independent)) - return 0; - - if (check_resources(dev->dependent)) + if (check_resources(dev)) return 0; return -ENODEV; diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 9bc42763623c..18ca9075e131 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -448,22 +448,27 @@ config SERIAL_CLPS711X_CONSOLE your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time.) -config SERIAL_S3C2410 - tristate "Samsung S3C2410/S3C2440/S3C2442/S3C2412 Serial port support" - depends on ARM && ARCH_S3C2410 - select SERIAL_CORE +config SERIAL_SAMSUNG + tristate "Samsung SoC serial support" + depends on ARM && PLAT_S3C24XX help Support for the on-chip UARTs on the Samsung S3C24XX series CPUs, providing /dev/ttySAC0, 1 and 2 (note, some machines may not provide all of these ports, depending on how the serial port pins are configured. - Currently this driver supports the UARTS on the S3C2410, S3C2440, - S3C2442, S3C2412 and S3C2413 CPUs. +config SERIAL_SAMSUNG_DEBUG + bool "Samsung SoC serial debug" + depends on SERIAL_SAMSUNG + help + Add support for debugging the serial driver. Since this is + generally being used as a console, we use our own output + routines that go via the low-level debug printascii() + function. -config SERIAL_S3C2410_CONSOLE - bool "Support for console on S3C2410 serial port" - depends on SERIAL_S3C2410=y +config SERIAL_SAMSUNG_CONSOLE + bool "Support for console on Samsung SoC serial port" + depends on SERIAL_SAMSUNG=y select SERIAL_CORE_CONSOLE help Allow selection of the S3C24XX on-board serial ports for use as @@ -476,6 +481,37 @@ config SERIAL_S3C2410_CONSOLE your boot loader about how to pass options to the kernel at boot time.) +config SERIAL_S3C2400 + tristate "Samsung S3C2410 Serial port support" + depends on ARM && SERIAL_SAMSUNG && CPU_S3C2400 + default y if CPU_S3C2400 + help + Serial port support for the Samsung S3C2400 SoC + +config SERIAL_S3C2410 + tristate "Samsung S3C2410 Serial port support" + depends on SERIAL_SAMSUNG && CPU_S3C2410 + default y if CPU_S3C2410 + help + Serial port support for the Samsung S3C2410 SoC + +config SERIAL_S3C2412 + tristate "Samsung S3C2412/S3C2413 Serial port support" + depends on SERIAL_SAMSUNG && CPU_S3C2412 + default y if CPU_S3C2412 + help + Serial port support for the Samsung S3C2412 and S3C2413 SoC + +config SERIAL_S3C2440 + tristate "Samsung S3C2440/S3C2442 Serial port support" + depends on SERIAL_SAMSUNG && (CPU_S3C2440 || CPU_S3C2442) + default y if CPU_S3C2440 + default y if CPU_S3C2442 + help + Serial port support for the Samsung S3C2440 and S3C2442 SoC + + + config SERIAL_DZ bool "DECstation DZ serial driver" depends on MACH_DECSTATION && 32BIT @@ -753,7 +789,7 @@ config BFIN_UART3_CTSRTS config SERIAL_IMX bool "IMX serial port support" - depends on ARM && ARCH_IMX + depends on ARM && (ARCH_IMX || ARCH_MXC) select SERIAL_CORE help If you have a machine based on a Motorola IMX CPU you diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 0d9c09b1e836..7d85c1fbe7e0 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -28,7 +28,11 @@ obj-$(CONFIG_SERIAL_PNX8XXX) += pnx8xxx_uart.o obj-$(CONFIG_SERIAL_SA1100) += sa1100.o obj-$(CONFIG_SERIAL_BFIN) += bfin_5xx.o obj-$(CONFIG_SERIAL_BFIN_SPORT) += bfin_sport_uart.o +obj-$(CONFIG_SERIAL_SAMSUNG) += samsung.o +obj-$(CONFIG_SERIAL_S3C2400) += s3c2400.o obj-$(CONFIG_SERIAL_S3C2410) += s3c2410.o +obj-$(CONFIG_SERIAL_S3C2412) += s3c2412.o +obj-$(CONFIG_SERIAL_S3C2440) += s3c2440.o obj-$(CONFIG_SERIAL_SUNCORE) += suncore.o obj-$(CONFIG_SERIAL_SUNHV) += sunhv.o obj-$(CONFIG_SERIAL_SUNZILOG) += sunzilog.o diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c index 42be8b01a40f..6aeef22bd203 100644 --- a/drivers/serial/atmel_serial.c +++ b/drivers/serial/atmel_serial.c @@ -1439,14 +1439,29 @@ static struct uart_driver atmel_uart = { }; #ifdef CONFIG_PM +static bool atmel_serial_clk_will_stop(void) +{ +#ifdef CONFIG_ARCH_AT91 + return at91_suspend_entering_slow_clock(); +#else + return false; +#endif +} + static int atmel_serial_suspend(struct platform_device *pdev, pm_message_t state) { struct uart_port *port = platform_get_drvdata(pdev); struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + if (atmel_is_console_port(port) && console_suspend_enabled) { + /* Drain the TX shifter */ + while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY)) + cpu_relax(); + } + if (device_may_wakeup(&pdev->dev) - && !at91_suspend_entering_slow_clock()) + && !atmel_serial_clk_will_stop()) enable_irq_wake(port->irq); else { uart_suspend_port(&atmel_uart, port); diff --git a/drivers/serial/cpm_uart/cpm_uart.h b/drivers/serial/cpm_uart/cpm_uart.h index 0cc39f82d7c5..5c76e0ae0582 100644 --- a/drivers/serial/cpm_uart/cpm_uart.h +++ b/drivers/serial/cpm_uart/cpm_uart.h @@ -6,7 +6,7 @@ * Copyright (C) 2004 Freescale Semiconductor, Inc. * * 2006 (c) MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> + * Vitaly Bordug <vbordug@ru.mvista.com> * * This file is licensed under the terms of the GNU General Public License * version 2. This program is licensed "as is" without any warranty of any @@ -28,7 +28,7 @@ #define SERIAL_CPM_MAJOR 204 #define SERIAL_CPM_MINOR 46 -#define IS_SMC(pinfo) (pinfo->flags & FLAG_SMC) +#define IS_SMC(pinfo) (pinfo->flags & FLAG_SMC) #define IS_DISCARDING(pinfo) (pinfo->flags & FLAG_DISCARDING) #define FLAG_DISCARDING 0x00000004 /* when set, don't discard */ #define FLAG_SMC 0x00000002 @@ -70,7 +70,7 @@ struct uart_cpm_port { void (*set_lineif)(struct uart_cpm_port *); u8 brg; uint dp_addr; - void *mem_addr; + void *mem_addr; dma_addr_t dma_addr; u32 mem_size; /* helpers */ @@ -79,14 +79,11 @@ struct uart_cpm_port { /* Keep track of 'odd' SMC2 wirings */ int is_portb; /* wait on close if needed */ - int wait_closing; + int wait_closing; /* value to combine with opcode to form cpm command */ u32 command; }; -#ifndef CONFIG_PPC_CPM_NEW_BINDING -extern int cpm_uart_port_map[UART_NR]; -#endif extern int cpm_uart_nr; extern struct uart_cpm_port cpm_uart_ports[UART_NR]; diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c index a19dc7ef8861..abe129cc927a 100644 --- a/drivers/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/serial/cpm_uart/cpm_uart_core.c @@ -13,7 +13,7 @@ * Copyright (C) 2004, 2007 Freescale Semiconductor, Inc. * (C) 2004 Intracom, S.A. * (C) 2005-2006 MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> + * Vitaly Bordug <vbordug@ru.mvista.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -42,6 +42,7 @@ #include <linux/bootmem.h> #include <linux/dma-mapping.h> #include <linux/fs_uart_pd.h> +#include <linux/of_platform.h> #include <asm/io.h> #include <asm/irq.h> @@ -49,10 +50,6 @@ #include <asm/fs_pd.h> #include <asm/udbg.h> -#ifdef CONFIG_PPC_CPM_NEW_BINDING -#include <linux/of_platform.h> -#endif - #if defined(CONFIG_SERIAL_CPM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) #define SUPPORT_SYSRQ #endif @@ -72,59 +69,6 @@ static void cpm_uart_initbd(struct uart_cpm_port *pinfo); /**************************************************************/ -#ifndef CONFIG_PPC_CPM_NEW_BINDING -/* Track which ports are configured as uarts */ -int cpm_uart_port_map[UART_NR]; -/* How many ports did we config as uarts */ -int cpm_uart_nr; - -/* Place-holder for board-specific stuff */ -struct platform_device* __attribute__ ((weak)) __init -early_uart_get_pdev(int index) -{ - return NULL; -} - - -static void cpm_uart_count(void) -{ - cpm_uart_nr = 0; -#ifdef CONFIG_SERIAL_CPM_SMC1 - cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1; -#endif -#ifdef CONFIG_SERIAL_CPM_SMC2 - cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2; -#endif -#ifdef CONFIG_SERIAL_CPM_SCC1 - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1; -#endif -#ifdef CONFIG_SERIAL_CPM_SCC2 - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2; -#endif -#ifdef CONFIG_SERIAL_CPM_SCC3 - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3; -#endif -#ifdef CONFIG_SERIAL_CPM_SCC4 - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4; -#endif -} - -/* Get UART number by its id */ -static int cpm_uart_id2nr(int id) -{ - int i; - if (id < UART_NR) { - for (i=0; i<UART_NR; i++) { - if (cpm_uart_port_map[i] == id) - return i; - } - } - - /* not found or invalid argument */ - return -1; -} -#endif - /* * Check, if transmit buffers are processed */ @@ -547,6 +491,11 @@ static void cpm_uart_set_termios(struct uart_port *port, } /* + * Update the timeout + */ + uart_update_timeout(port, termios->c_cflag, baud); + + /* * Set up parity check flag */ #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) @@ -935,7 +884,6 @@ static struct uart_ops cpm_uart_pops = { .verify_port = cpm_uart_verify_port, }; -#ifdef CONFIG_PPC_CPM_NEW_BINDING struct uart_cpm_port cpm_uart_ports[UART_NR]; static int cpm_uart_init_port(struct device_node *np, @@ -995,6 +943,7 @@ static int cpm_uart_init_port(struct device_node *np, pinfo->port.type = PORT_CPM; pinfo->port.ops = &cpm_uart_pops, pinfo->port.iotype = UPIO_MEM; + pinfo->port.fifosize = pinfo->tx_nrfifos * pinfo->tx_fifosize; spin_lock_init(&pinfo->port.lock); pinfo->port.irq = of_irq_to_resource(np, 0, NULL); @@ -1012,153 +961,6 @@ out_mem: return ret; } -#else - -struct uart_cpm_port cpm_uart_ports[UART_NR] = { - [UART_SMC1] = { - .port = { - .irq = SMC1_IRQ, - .ops = &cpm_uart_pops, - .iotype = UPIO_MEM, - .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SMC1].port.lock), - }, - .flags = FLAG_SMC, - .tx_nrfifos = TX_NUM_FIFO, - .tx_fifosize = TX_BUF_SIZE, - .rx_nrfifos = RX_NUM_FIFO, - .rx_fifosize = RX_BUF_SIZE, - .set_lineif = smc1_lineif, - }, - [UART_SMC2] = { - .port = { - .irq = SMC2_IRQ, - .ops = &cpm_uart_pops, - .iotype = UPIO_MEM, - .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SMC2].port.lock), - }, - .flags = FLAG_SMC, - .tx_nrfifos = TX_NUM_FIFO, - .tx_fifosize = TX_BUF_SIZE, - .rx_nrfifos = RX_NUM_FIFO, - .rx_fifosize = RX_BUF_SIZE, - .set_lineif = smc2_lineif, -#ifdef CONFIG_SERIAL_CPM_ALT_SMC2 - .is_portb = 1, -#endif - }, - [UART_SCC1] = { - .port = { - .irq = SCC1_IRQ, - .ops = &cpm_uart_pops, - .iotype = UPIO_MEM, - .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SCC1].port.lock), - }, - .tx_nrfifos = TX_NUM_FIFO, - .tx_fifosize = TX_BUF_SIZE, - .rx_nrfifos = RX_NUM_FIFO, - .rx_fifosize = RX_BUF_SIZE, - .set_lineif = scc1_lineif, - .wait_closing = SCC_WAIT_CLOSING, - }, - [UART_SCC2] = { - .port = { - .irq = SCC2_IRQ, - .ops = &cpm_uart_pops, - .iotype = UPIO_MEM, - .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SCC2].port.lock), - }, - .tx_nrfifos = TX_NUM_FIFO, - .tx_fifosize = TX_BUF_SIZE, - .rx_nrfifos = RX_NUM_FIFO, - .rx_fifosize = RX_BUF_SIZE, - .set_lineif = scc2_lineif, - .wait_closing = SCC_WAIT_CLOSING, - }, - [UART_SCC3] = { - .port = { - .irq = SCC3_IRQ, - .ops = &cpm_uart_pops, - .iotype = UPIO_MEM, - .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SCC3].port.lock), - }, - .tx_nrfifos = TX_NUM_FIFO, - .tx_fifosize = TX_BUF_SIZE, - .rx_nrfifos = RX_NUM_FIFO, - .rx_fifosize = RX_BUF_SIZE, - .set_lineif = scc3_lineif, - .wait_closing = SCC_WAIT_CLOSING, - }, - [UART_SCC4] = { - .port = { - .irq = SCC4_IRQ, - .ops = &cpm_uart_pops, - .iotype = UPIO_MEM, - .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SCC4].port.lock), - }, - .tx_nrfifos = TX_NUM_FIFO, - .tx_fifosize = TX_BUF_SIZE, - .rx_nrfifos = RX_NUM_FIFO, - .rx_fifosize = RX_BUF_SIZE, - .set_lineif = scc4_lineif, - .wait_closing = SCC_WAIT_CLOSING, - }, -}; - -int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con) -{ - struct resource *r; - struct fs_uart_platform_info *pdata = pdev->dev.platform_data; - int idx; /* It is UART_SMCx or UART_SCCx index */ - struct uart_cpm_port *pinfo; - int line; - u32 mem, pram; - - idx = pdata->fs_no = fs_uart_get_id(pdata); - - line = cpm_uart_id2nr(idx); - if(line < 0) { - printk(KERN_ERR"%s(): port %d is not registered", __func__, idx); - return -EINVAL; - } - - pinfo = (struct uart_cpm_port *) &cpm_uart_ports[idx]; - - pinfo->brg = pdata->brg; - - if (!is_con) { - pinfo->port.line = line; - pinfo->port.flags = UPF_BOOT_AUTOCONF; - } - - if (!(r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"))) - return -EINVAL; - mem = (u32)ioremap(r->start, r->end - r->start + 1); - - if (!(r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pram"))) - return -EINVAL; - pram = (u32)ioremap(r->start, r->end - r->start + 1); - - if(idx > fsid_smc2_uart) { - pinfo->sccp = (scc_t *)mem; - pinfo->sccup = (scc_uart_t *)pram; - } else { - pinfo->smcp = (smc_t *)mem; - pinfo->smcup = (smc_uart_t *)pram; - } - pinfo->tx_nrfifos = pdata->tx_num_fifo; - pinfo->tx_fifosize = pdata->tx_buf_size; - - pinfo->rx_nrfifos = pdata->rx_num_fifo; - pinfo->rx_fifosize = pdata->rx_buf_size; - - pinfo->port.uartclk = pdata->uart_clk; - pinfo->port.mapbase = (unsigned long)mem; - pinfo->port.irq = platform_get_irq(pdev, 0); - - return 0; -} -#endif - #ifdef CONFIG_SERIAL_CPM_CONSOLE /* * Print a string to the serial port trying not to disturb @@ -1169,15 +971,18 @@ int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con) static void cpm_uart_console_write(struct console *co, const char *s, u_int count) { -#ifdef CONFIG_PPC_CPM_NEW_BINDING struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index]; -#else - struct uart_cpm_port *pinfo = - &cpm_uart_ports[cpm_uart_port_map[co->index]]; -#endif unsigned int i; cbd_t __iomem *bdp, *bdbase; unsigned char *cp; + unsigned long flags; + int nolock = oops_in_progress; + + if (unlikely(nolock)) { + local_irq_save(flags); + } else { + spin_lock_irqsave(&pinfo->port.lock, flags); + } /* Get the address of the host memory buffer. */ @@ -1239,6 +1044,12 @@ static void cpm_uart_console_write(struct console *co, const char *s, ; pinfo->tx_cur = bdp; + + if (unlikely(nolock)) { + local_irq_restore(flags); + } else { + spin_unlock_irqrestore(&pinfo->port.lock, flags); + } } @@ -1252,7 +1063,6 @@ static int __init cpm_uart_console_setup(struct console *co, char *options) struct uart_cpm_port *pinfo; struct uart_port *port; -#ifdef CONFIG_PPC_CPM_NEW_BINDING struct device_node *np = NULL; int i = 0; @@ -1284,35 +1094,6 @@ static int __init cpm_uart_console_setup(struct console *co, char *options) if (ret) return ret; -#else - - struct fs_uart_platform_info *pdata; - struct platform_device* pdev = early_uart_get_pdev(co->index); - - if (!pdev) { - pr_info("cpm_uart: console: compat mode\n"); - /* compatibility - will be cleaned up */ - cpm_uart_init_portdesc(); - } - - port = - (struct uart_port *)&cpm_uart_ports[cpm_uart_port_map[co->index]]; - pinfo = (struct uart_cpm_port *)port; - if (!pdev) { - if (pinfo->set_lineif) - pinfo->set_lineif(pinfo); - } else { - pdata = pdev->dev.platform_data; - if (pdata) - if (pdata->init_ioports) - pdata->init_ioports(pdata); - - cpm_uart_drv_get_platform_data(pdev, 1); - } - - pinfo->flags |= FLAG_CONSOLE; -#endif - if (options) { uart_parse_options(options, &baud, &parity, &bits, &flow); } else { @@ -1386,7 +1167,6 @@ static struct uart_driver cpm_reg = { .nr = UART_NR, }; -#ifdef CONFIG_PPC_CPM_NEW_BINDING static int probe_index; static int __devinit cpm_uart_probe(struct of_device *ofdev, @@ -1457,135 +1237,6 @@ static void __exit cpm_uart_exit(void) of_unregister_platform_driver(&cpm_uart_driver); uart_unregister_driver(&cpm_reg); } -#else -static int cpm_uart_drv_probe(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct fs_uart_platform_info *pdata; - int ret = -ENODEV; - - if(!pdev) { - printk(KERN_ERR"CPM UART: platform data missing!\n"); - return ret; - } - - pdata = pdev->dev.platform_data; - - if ((ret = cpm_uart_drv_get_platform_data(pdev, 0))) - return ret; - - pr_debug("cpm_uart_drv_probe: Adding CPM UART %d\n", cpm_uart_id2nr(pdata->fs_no)); - - if (pdata->init_ioports) - pdata->init_ioports(pdata); - - ret = uart_add_one_port(&cpm_reg, &cpm_uart_ports[pdata->fs_no].port); - - return ret; -} - -static int cpm_uart_drv_remove(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct fs_uart_platform_info *pdata = pdev->dev.platform_data; - - pr_debug("cpm_uart_drv_remove: Removing CPM UART %d\n", - cpm_uart_id2nr(pdata->fs_no)); - - uart_remove_one_port(&cpm_reg, &cpm_uart_ports[pdata->fs_no].port); - return 0; -} - -static struct device_driver cpm_smc_uart_driver = { - .name = "fsl-cpm-smc:uart", - .bus = &platform_bus_type, - .probe = cpm_uart_drv_probe, - .remove = cpm_uart_drv_remove, -}; - -static struct device_driver cpm_scc_uart_driver = { - .name = "fsl-cpm-scc:uart", - .bus = &platform_bus_type, - .probe = cpm_uart_drv_probe, - .remove = cpm_uart_drv_remove, -}; - -/* - This is supposed to match uart devices on platform bus, - */ -static int match_is_uart (struct device* dev, void* data) -{ - struct platform_device* pdev = container_of(dev, struct platform_device, dev); - int ret = 0; - /* this was setfunc as uart */ - if(strstr(pdev->name,":uart")) { - ret = 1; - } - return ret; -} - - -static int cpm_uart_init(void) { - - int ret; - int i; - struct device *dev; - printk(KERN_INFO "Serial: CPM driver $Revision: 0.02 $\n"); - - /* lookup the bus for uart devices */ - dev = bus_find_device(&platform_bus_type, NULL, 0, match_is_uart); - - /* There are devices on the bus - all should be OK */ - if (dev) { - cpm_uart_count(); - cpm_reg.nr = cpm_uart_nr; - - if (!(ret = uart_register_driver(&cpm_reg))) { - if ((ret = driver_register(&cpm_smc_uart_driver))) { - uart_unregister_driver(&cpm_reg); - return ret; - } - if ((ret = driver_register(&cpm_scc_uart_driver))) { - driver_unregister(&cpm_scc_uart_driver); - uart_unregister_driver(&cpm_reg); - } - } - } else { - /* No capable platform devices found - falling back to legacy mode */ - pr_info("cpm_uart: WARNING: no UART devices found on platform bus!\n"); - pr_info( - "cpm_uart: the driver will guess configuration, but this mode is no longer supported.\n"); - - /* Don't run this again, if the console driver did it already */ - if (cpm_uart_nr == 0) - cpm_uart_init_portdesc(); - - cpm_reg.nr = cpm_uart_nr; - ret = uart_register_driver(&cpm_reg); - - if (ret) - return ret; - - for (i = 0; i < cpm_uart_nr; i++) { - int con = cpm_uart_port_map[i]; - cpm_uart_ports[con].port.line = i; - cpm_uart_ports[con].port.flags = UPF_BOOT_AUTOCONF; - if (cpm_uart_ports[con].set_lineif) - cpm_uart_ports[con].set_lineif(&cpm_uart_ports[con]); - uart_add_one_port(&cpm_reg, &cpm_uart_ports[con].port); - } - - } - return ret; -} - -static void __exit cpm_uart_exit(void) -{ - driver_unregister(&cpm_scc_uart_driver); - driver_unregister(&cpm_smc_uart_driver); - uart_unregister_driver(&cpm_reg); -} -#endif module_init(cpm_uart_init); module_exit(cpm_uart_exit); diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/serial/cpm_uart/cpm_uart_cpm1.c index 74f1432bb248..0f0aff06c596 100644 --- a/drivers/serial/cpm_uart/cpm_uart_cpm1.c +++ b/drivers/serial/cpm_uart/cpm_uart_cpm1.c @@ -9,7 +9,7 @@ * Copyright (C) 2004 Freescale Semiconductor, Inc. * (C) 2004 Intracom, S.A. * (C) 2006 MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> + * Vitaly Bordug <vbordug@ru.mvista.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -51,7 +51,6 @@ /**************************************************************/ -#ifdef CONFIG_PPC_CPM_NEW_BINDING void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd) { cpm_command(port->command, cmd); @@ -68,75 +67,6 @@ void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram) iounmap(pram); } -#else -void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd) -{ - ushort val; - int line = port - cpm_uart_ports; - volatile cpm8xx_t *cp = cpmp; - - switch (line) { - case UART_SMC1: - val = mk_cr_cmd(CPM_CR_CH_SMC1, cmd) | CPM_CR_FLG; - break; - case UART_SMC2: - val = mk_cr_cmd(CPM_CR_CH_SMC2, cmd) | CPM_CR_FLG; - break; - case UART_SCC1: - val = mk_cr_cmd(CPM_CR_CH_SCC1, cmd) | CPM_CR_FLG; - break; - case UART_SCC2: - val = mk_cr_cmd(CPM_CR_CH_SCC2, cmd) | CPM_CR_FLG; - break; - case UART_SCC3: - val = mk_cr_cmd(CPM_CR_CH_SCC3, cmd) | CPM_CR_FLG; - break; - case UART_SCC4: - val = mk_cr_cmd(CPM_CR_CH_SCC4, cmd) | CPM_CR_FLG; - break; - default: - return; - - } - cp->cp_cpcr = val; - while (cp->cp_cpcr & CPM_CR_FLG) ; -} - -void smc1_lineif(struct uart_cpm_port *pinfo) -{ - pinfo->brg = 1; -} - -void smc2_lineif(struct uart_cpm_port *pinfo) -{ - pinfo->brg = 2; -} - -void scc1_lineif(struct uart_cpm_port *pinfo) -{ - /* XXX SCC1: insert port configuration here */ - pinfo->brg = 1; -} - -void scc2_lineif(struct uart_cpm_port *pinfo) -{ - /* XXX SCC2: insert port configuration here */ - pinfo->brg = 2; -} - -void scc3_lineif(struct uart_cpm_port *pinfo) -{ - /* XXX SCC3: insert port configuration here */ - pinfo->brg = 3; -} - -void scc4_lineif(struct uart_cpm_port *pinfo) -{ - /* XXX SCC4: insert port configuration here */ - pinfo->brg = 4; -} -#endif - /* * Allocate DP-Ram and memory buffers. We need to allocate a transmit and * receive buffer descriptors from dual port ram, and a character @@ -205,101 +135,3 @@ void cpm_uart_freebuf(struct uart_cpm_port *pinfo) cpm_dpfree(pinfo->dp_addr); } - -#ifndef CONFIG_PPC_CPM_NEW_BINDING -/* Setup any dynamic params in the uart desc */ -int cpm_uart_init_portdesc(void) -{ - pr_debug("CPM uart[-]:init portdesc\n"); - - cpm_uart_nr = 0; -#ifdef CONFIG_SERIAL_CPM_SMC1 - cpm_uart_ports[UART_SMC1].smcp = &cpmp->cp_smc[0]; -/* - * Is SMC1 being relocated? - */ -# ifdef CONFIG_I2C_SPI_SMC1_UCODE_PATCH - cpm_uart_ports[UART_SMC1].smcup = - (smc_uart_t *) & cpmp->cp_dparam[0x3C0]; -# else - cpm_uart_ports[UART_SMC1].smcup = - (smc_uart_t *) & cpmp->cp_dparam[PROFF_SMC1]; -# endif - cpm_uart_ports[UART_SMC1].port.mapbase = - (unsigned long)&cpmp->cp_smc[0]; - cpm_uart_ports[UART_SMC1].smcp->smc_smcm |= (SMCM_RX | SMCM_TX); - cpm_uart_ports[UART_SMC1].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); - cpm_uart_ports[UART_SMC1].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1; -#endif - -#ifdef CONFIG_SERIAL_CPM_SMC2 - cpm_uart_ports[UART_SMC2].smcp = &cpmp->cp_smc[1]; - cpm_uart_ports[UART_SMC2].smcup = - (smc_uart_t *) & cpmp->cp_dparam[PROFF_SMC2]; - cpm_uart_ports[UART_SMC2].port.mapbase = - (unsigned long)&cpmp->cp_smc[1]; - cpm_uart_ports[UART_SMC2].smcp->smc_smcm |= (SMCM_RX | SMCM_TX); - cpm_uart_ports[UART_SMC2].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); - cpm_uart_ports[UART_SMC2].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2; -#endif - -#ifdef CONFIG_SERIAL_CPM_SCC1 - cpm_uart_ports[UART_SCC1].sccp = &cpmp->cp_scc[0]; - cpm_uart_ports[UART_SCC1].sccup = - (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC1]; - cpm_uart_ports[UART_SCC1].port.mapbase = - (unsigned long)&cpmp->cp_scc[0]; - cpm_uart_ports[UART_SCC1].sccp->scc_sccm &= - ~(UART_SCCM_TX | UART_SCCM_RX); - cpm_uart_ports[UART_SCC1].sccp->scc_gsmrl &= - ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); - cpm_uart_ports[UART_SCC1].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1; -#endif - -#ifdef CONFIG_SERIAL_CPM_SCC2 - cpm_uart_ports[UART_SCC2].sccp = &cpmp->cp_scc[1]; - cpm_uart_ports[UART_SCC2].sccup = - (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC2]; - cpm_uart_ports[UART_SCC2].port.mapbase = - (unsigned long)&cpmp->cp_scc[1]; - cpm_uart_ports[UART_SCC2].sccp->scc_sccm &= - ~(UART_SCCM_TX | UART_SCCM_RX); - cpm_uart_ports[UART_SCC2].sccp->scc_gsmrl &= - ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); - cpm_uart_ports[UART_SCC2].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2; -#endif - -#ifdef CONFIG_SERIAL_CPM_SCC3 - cpm_uart_ports[UART_SCC3].sccp = &cpmp->cp_scc[2]; - cpm_uart_ports[UART_SCC3].sccup = - (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC3]; - cpm_uart_ports[UART_SCC3].port.mapbase = - (unsigned long)&cpmp->cp_scc[2]; - cpm_uart_ports[UART_SCC3].sccp->scc_sccm &= - ~(UART_SCCM_TX | UART_SCCM_RX); - cpm_uart_ports[UART_SCC3].sccp->scc_gsmrl &= - ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); - cpm_uart_ports[UART_SCC3].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3; -#endif - -#ifdef CONFIG_SERIAL_CPM_SCC4 - cpm_uart_ports[UART_SCC4].sccp = &cpmp->cp_scc[3]; - cpm_uart_ports[UART_SCC4].sccup = - (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC4]; - cpm_uart_ports[UART_SCC4].port.mapbase = - (unsigned long)&cpmp->cp_scc[3]; - cpm_uart_ports[UART_SCC4].sccp->scc_sccm &= - ~(UART_SCCM_TX | UART_SCCM_RX); - cpm_uart_ports[UART_SCC4].sccp->scc_gsmrl &= - ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); - cpm_uart_ports[UART_SCC4].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4; -#endif - return 0; -} -#endif diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm1.h b/drivers/serial/cpm_uart/cpm_uart_cpm1.h index ddf46d3c964b..10eecd6af6d4 100644 --- a/drivers/serial/cpm_uart/cpm_uart_cpm1.h +++ b/drivers/serial/cpm_uart/cpm_uart_cpm1.h @@ -2,7 +2,7 @@ * linux/drivers/serial/cpm_uart/cpm_uart_cpm1.h * * Driver for CPM (SCC/SMC) serial ports - * + * * definitions for cpm1 * */ @@ -12,16 +12,6 @@ #include <asm/cpm1.h> -/* defines for IRQs */ -#ifndef CONFIG_PPC_CPM_NEW_BINDING -#define SMC1_IRQ (CPM_IRQ_OFFSET + CPMVEC_SMC1) -#define SMC2_IRQ (CPM_IRQ_OFFSET + CPMVEC_SMC2) -#define SCC1_IRQ (CPM_IRQ_OFFSET + CPMVEC_SCC1) -#define SCC2_IRQ (CPM_IRQ_OFFSET + CPMVEC_SCC2) -#define SCC3_IRQ (CPM_IRQ_OFFSET + CPMVEC_SCC3) -#define SCC4_IRQ (CPM_IRQ_OFFSET + CPMVEC_SCC4) -#endif - static inline void cpm_set_brg(int brg, int baud) { cpm_setbrg(brg, baud); diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/serial/cpm_uart/cpm_uart_cpm2.c index bb862e2f54cf..b8db4d3eed36 100644 --- a/drivers/serial/cpm_uart/cpm_uart_cpm2.c +++ b/drivers/serial/cpm_uart/cpm_uart_cpm2.c @@ -5,11 +5,11 @@ * * Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2) * Pantelis Antoniou (panto@intracom.gr) (CPM1) - * + * * Copyright (C) 2004 Freescale Semiconductor, Inc. * (C) 2004 Intracom, S.A. * (C) 2006 MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> + * Vitaly Bordug <vbordug@ru.mvista.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -41,9 +41,7 @@ #include <asm/io.h> #include <asm/irq.h> #include <asm/fs_pd.h> -#ifdef CONFIG_PPC_CPM_NEW_BINDING #include <asm/prom.h> -#endif #include <linux/serial_core.h> #include <linux/kernel.h> @@ -52,7 +50,6 @@ /**************************************************************/ -#ifdef CONFIG_PPC_CPM_NEW_BINDING void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd) { cpm_command(port->command, cmd); @@ -106,174 +103,8 @@ void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram) iounmap(pram); } -#else -void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd) -{ - ulong val; - int line = port - cpm_uart_ports; - volatile cpm_cpm2_t *cp = cpm2_map(im_cpm); - - - switch (line) { - case UART_SMC1: - val = mk_cr_cmd(CPM_CR_SMC1_PAGE, CPM_CR_SMC1_SBLOCK, 0, - cmd) | CPM_CR_FLG; - break; - case UART_SMC2: - val = mk_cr_cmd(CPM_CR_SMC2_PAGE, CPM_CR_SMC2_SBLOCK, 0, - cmd) | CPM_CR_FLG; - break; - case UART_SCC1: - val = mk_cr_cmd(CPM_CR_SCC1_PAGE, CPM_CR_SCC1_SBLOCK, 0, - cmd) | CPM_CR_FLG; - break; - case UART_SCC2: - val = mk_cr_cmd(CPM_CR_SCC2_PAGE, CPM_CR_SCC2_SBLOCK, 0, - cmd) | CPM_CR_FLG; - break; - case UART_SCC3: - val = mk_cr_cmd(CPM_CR_SCC3_PAGE, CPM_CR_SCC3_SBLOCK, 0, - cmd) | CPM_CR_FLG; - break; - case UART_SCC4: - val = mk_cr_cmd(CPM_CR_SCC4_PAGE, CPM_CR_SCC4_SBLOCK, 0, - cmd) | CPM_CR_FLG; - break; - default: - return; - - } - cp->cp_cpcr = val; - while (cp->cp_cpcr & CPM_CR_FLG) ; - - cpm2_unmap(cp); -} - -void smc1_lineif(struct uart_cpm_port *pinfo) -{ - volatile iop_cpm2_t *io = cpm2_map(im_ioport); - volatile cpmux_t *cpmux = cpm2_map(im_cpmux); - - /* SMC1 is only on port D */ - io->iop_ppard |= 0x00c00000; - io->iop_pdird |= 0x00400000; - io->iop_pdird &= ~0x00800000; - io->iop_psord &= ~0x00c00000; - - /* Wire BRG1 to SMC1 */ - cpmux->cmx_smr &= 0x0f; - pinfo->brg = 1; - - cpm2_unmap(cpmux); - cpm2_unmap(io); -} - -void smc2_lineif(struct uart_cpm_port *pinfo) -{ - volatile iop_cpm2_t *io = cpm2_map(im_ioport); - volatile cpmux_t *cpmux = cpm2_map(im_cpmux); - - /* SMC2 is only on port A */ - io->iop_ppara |= 0x00c00000; - io->iop_pdira |= 0x00400000; - io->iop_pdira &= ~0x00800000; - io->iop_psora &= ~0x00c00000; - - /* Wire BRG2 to SMC2 */ - cpmux->cmx_smr &= 0xf0; - pinfo->brg = 2; - - cpm2_unmap(cpmux); - cpm2_unmap(io); -} - -void scc1_lineif(struct uart_cpm_port *pinfo) -{ - volatile iop_cpm2_t *io = cpm2_map(im_ioport); - volatile cpmux_t *cpmux = cpm2_map(im_cpmux); - - /* Use Port D for SCC1 instead of other functions. */ - io->iop_ppard |= 0x00000003; - io->iop_psord &= ~0x00000001; /* Rx */ - io->iop_psord |= 0x00000002; /* Tx */ - io->iop_pdird &= ~0x00000001; /* Rx */ - io->iop_pdird |= 0x00000002; /* Tx */ - - /* Wire BRG1 to SCC1 */ - cpmux->cmx_scr &= 0x00ffffff; - cpmux->cmx_scr |= 0x00000000; - pinfo->brg = 1; - - cpm2_unmap(cpmux); - cpm2_unmap(io); -} - -void scc2_lineif(struct uart_cpm_port *pinfo) -{ - /* - * STx GP3 uses the SCC2 secondary option pin assignment - * which this driver doesn't account for in the static - * pin assignments. This kind of board specific info - * really has to get out of the driver so boards can - * be supported in a sane fashion. - */ - volatile cpmux_t *cpmux = cpm2_map(im_cpmux); -#ifndef CONFIG_STX_GP3 - volatile iop_cpm2_t *io = cpm2_map(im_ioport); - - io->iop_pparb |= 0x008b0000; - io->iop_pdirb |= 0x00880000; - io->iop_psorb |= 0x00880000; - io->iop_pdirb &= ~0x00030000; - io->iop_psorb &= ~0x00030000; -#endif - cpmux->cmx_scr &= 0xff00ffff; - cpmux->cmx_scr |= 0x00090000; - pinfo->brg = 2; - - cpm2_unmap(cpmux); - cpm2_unmap(io); -} - -void scc3_lineif(struct uart_cpm_port *pinfo) -{ - volatile iop_cpm2_t *io = cpm2_map(im_ioport); - volatile cpmux_t *cpmux = cpm2_map(im_cpmux); - - io->iop_pparb |= 0x008b0000; - io->iop_pdirb |= 0x00880000; - io->iop_psorb |= 0x00880000; - io->iop_pdirb &= ~0x00030000; - io->iop_psorb &= ~0x00030000; - cpmux->cmx_scr &= 0xffff00ff; - cpmux->cmx_scr |= 0x00001200; - pinfo->brg = 3; - - cpm2_unmap(cpmux); - cpm2_unmap(io); -} - -void scc4_lineif(struct uart_cpm_port *pinfo) -{ - volatile iop_cpm2_t *io = cpm2_map(im_ioport); - volatile cpmux_t *cpmux = cpm2_map(im_cpmux); - - io->iop_ppard |= 0x00000600; - io->iop_psord &= ~0x00000600; /* Tx/Rx */ - io->iop_pdird &= ~0x00000200; /* Rx */ - io->iop_pdird |= 0x00000400; /* Tx */ - - cpmux->cmx_scr &= 0xffffff00; - cpmux->cmx_scr |= 0x0000001b; - pinfo->brg = 4; - - cpm2_unmap(cpmux); - cpm2_unmap(io); -} -#endif - /* - * Allocate DP-Ram and memory buffers. We need to allocate a transmit and + * Allocate DP-Ram and memory buffers. We need to allocate a transmit and * receive buffer descriptors from dual port ram, and a character * buffer area from host mem. If we are allocating for the console we need * to do it from bootmem @@ -340,111 +171,3 @@ void cpm_uart_freebuf(struct uart_cpm_port *pinfo) cpm_dpfree(pinfo->dp_addr); } - -#ifndef CONFIG_PPC_CPM_NEW_BINDING -/* Setup any dynamic params in the uart desc */ -int cpm_uart_init_portdesc(void) -{ -#if defined(CONFIG_SERIAL_CPM_SMC1) || defined(CONFIG_SERIAL_CPM_SMC2) - u16 *addr; -#endif - pr_debug("CPM uart[-]:init portdesc\n"); - - cpm_uart_nr = 0; -#ifdef CONFIG_SERIAL_CPM_SMC1 - cpm_uart_ports[UART_SMC1].smcp = (smc_t *) cpm2_map(im_smc[0]); - cpm_uart_ports[UART_SMC1].port.mapbase = - (unsigned long)cpm_uart_ports[UART_SMC1].smcp; - - cpm_uart_ports[UART_SMC1].smcup = - (smc_uart_t *) cpm2_map_size(im_dprambase[PROFF_SMC1], PROFF_SMC_SIZE); - addr = (u16 *)cpm2_map_size(im_dprambase[PROFF_SMC1_BASE], 2); - *addr = PROFF_SMC1; - cpm2_unmap(addr); - - cpm_uart_ports[UART_SMC1].smcp->smc_smcm |= (SMCM_RX | SMCM_TX); - cpm_uart_ports[UART_SMC1].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); - cpm_uart_ports[UART_SMC1].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1; -#endif - -#ifdef CONFIG_SERIAL_CPM_SMC2 - cpm_uart_ports[UART_SMC2].smcp = (smc_t *) cpm2_map(im_smc[1]); - cpm_uart_ports[UART_SMC2].port.mapbase = - (unsigned long)cpm_uart_ports[UART_SMC2].smcp; - - cpm_uart_ports[UART_SMC2].smcup = - (smc_uart_t *) cpm2_map_size(im_dprambase[PROFF_SMC2], PROFF_SMC_SIZE); - addr = (u16 *)cpm2_map_size(im_dprambase[PROFF_SMC2_BASE], 2); - *addr = PROFF_SMC2; - cpm2_unmap(addr); - - cpm_uart_ports[UART_SMC2].smcp->smc_smcm |= (SMCM_RX | SMCM_TX); - cpm_uart_ports[UART_SMC2].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); - cpm_uart_ports[UART_SMC2].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2; -#endif - -#ifdef CONFIG_SERIAL_CPM_SCC1 - cpm_uart_ports[UART_SCC1].sccp = (scc_t *) cpm2_map(im_scc[0]); - cpm_uart_ports[UART_SCC1].port.mapbase = - (unsigned long)cpm_uart_ports[UART_SCC1].sccp; - cpm_uart_ports[UART_SCC1].sccup = - (scc_uart_t *) cpm2_map_size(im_dprambase[PROFF_SCC1], PROFF_SCC_SIZE); - - cpm_uart_ports[UART_SCC1].sccp->scc_sccm &= - ~(UART_SCCM_TX | UART_SCCM_RX); - cpm_uart_ports[UART_SCC1].sccp->scc_gsmrl &= - ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); - cpm_uart_ports[UART_SCC1].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1; -#endif - -#ifdef CONFIG_SERIAL_CPM_SCC2 - cpm_uart_ports[UART_SCC2].sccp = (scc_t *) cpm2_map(im_scc[1]); - cpm_uart_ports[UART_SCC2].port.mapbase = - (unsigned long)cpm_uart_ports[UART_SCC2].sccp; - cpm_uart_ports[UART_SCC2].sccup = - (scc_uart_t *) cpm2_map_size(im_dprambase[PROFF_SCC2], PROFF_SCC_SIZE); - - cpm_uart_ports[UART_SCC2].sccp->scc_sccm &= - ~(UART_SCCM_TX | UART_SCCM_RX); - cpm_uart_ports[UART_SCC2].sccp->scc_gsmrl &= - ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); - cpm_uart_ports[UART_SCC2].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2; -#endif - -#ifdef CONFIG_SERIAL_CPM_SCC3 - cpm_uart_ports[UART_SCC3].sccp = (scc_t *) cpm2_map(im_scc[2]); - cpm_uart_ports[UART_SCC3].port.mapbase = - (unsigned long)cpm_uart_ports[UART_SCC3].sccp; - cpm_uart_ports[UART_SCC3].sccup = - (scc_uart_t *) cpm2_map_size(im_dprambase[PROFF_SCC3], PROFF_SCC_SIZE); - - cpm_uart_ports[UART_SCC3].sccp->scc_sccm &= - ~(UART_SCCM_TX | UART_SCCM_RX); - cpm_uart_ports[UART_SCC3].sccp->scc_gsmrl &= - ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); - cpm_uart_ports[UART_SCC3].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3; -#endif - -#ifdef CONFIG_SERIAL_CPM_SCC4 - cpm_uart_ports[UART_SCC4].sccp = (scc_t *) cpm2_map(im_scc[3]); - cpm_uart_ports[UART_SCC4].port.mapbase = - (unsigned long)cpm_uart_ports[UART_SCC4].sccp; - cpm_uart_ports[UART_SCC4].sccup = - (scc_uart_t *) cpm2_map_size(im_dprambase[PROFF_SCC4], PROFF_SCC_SIZE); - - cpm_uart_ports[UART_SCC4].sccp->scc_sccm &= - ~(UART_SCCM_TX | UART_SCCM_RX); - cpm_uart_ports[UART_SCC4].sccp->scc_gsmrl &= - ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); - cpm_uart_ports[UART_SCC4].port.uartclk = uart_clock(); - cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4; -#endif - - return 0; -} -#endif diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm2.h b/drivers/serial/cpm_uart/cpm_uart_cpm2.h index 40006a7dce46..7194c63dcf5f 100644 --- a/drivers/serial/cpm_uart/cpm_uart_cpm2.h +++ b/drivers/serial/cpm_uart/cpm_uart_cpm2.h @@ -2,7 +2,7 @@ * linux/drivers/serial/cpm_uart/cpm_uart_cpm2.h * * Driver for CPM (SCC/SMC) serial ports - * + * * definitions for cpm2 * */ @@ -12,16 +12,6 @@ #include <asm/cpm2.h> -/* defines for IRQs */ -#ifndef CONFIG_PPC_CPM_NEW_BINDING -#define SMC1_IRQ SIU_INT_SMC1 -#define SMC2_IRQ SIU_INT_SMC2 -#define SCC1_IRQ SIU_INT_SCC1 -#define SCC2_IRQ SIU_INT_SCC2 -#define SCC3_IRQ SIU_INT_SCC3 -#define SCC4_IRQ SIU_INT_SCC4 -#endif - static inline void cpm_set_brg(int brg, int baud) { cpm_setbrg(brg, baud); diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 5a375bf0ebf4..64acb39a51ba 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -40,6 +40,7 @@ #include <linux/tty_flip.h> #include <linux/serial_core.h> #include <linux/serial.h> +#include <linux/clk.h> #include <asm/io.h> #include <asm/irq.h> @@ -61,6 +62,11 @@ #define UBIR 0xa4 /* BRM Incremental Register */ #define UBMR 0xa8 /* BRM Modulator Register */ #define UBRC 0xac /* Baud Rate Count Register */ +#if defined CONFIG_ARCH_MX3 || defined CONFIG_ARCH_MX2 +#define ONEMS 0xb0 /* One Millisecond register */ +#define UTS 0xb4 /* UART Test Register */ +#endif +#ifdef CONFIG_ARCH_IMX #define BIPR1 0xb0 /* Incremental Preset Register 1 */ #define BIPR2 0xb4 /* Incremental Preset Register 2 */ #define BIPR3 0xb8 /* Incremental Preset Register 3 */ @@ -70,6 +76,7 @@ #define BMPR3 0xc8 /* BRM Modulator Register 3 */ #define BMPR4 0xcc /* BRM Modulator Register 4 */ #define UTS 0xd0 /* UART Test Register */ +#endif /* UART Control Register Bit Fields.*/ #define URXD_CHARRDY (1<<15) @@ -89,7 +96,12 @@ #define UCR1_RTSDEN (1<<5) /* RTS delta interrupt enable */ #define UCR1_SNDBRK (1<<4) /* Send break */ #define UCR1_TDMAEN (1<<3) /* Transmitter ready DMA enable */ +#ifdef CONFIG_ARCH_IMX #define UCR1_UARTCLKEN (1<<2) /* UART clock enabled */ +#endif +#if defined CONFIG_ARCH_MX3 || defined CONFIG_ARCH_MX2 +#define UCR1_UARTCLKEN (0) /* not present on mx2/mx3 */ +#endif #define UCR1_DOZE (1<<1) /* Doze */ #define UCR1_UARTEN (1<<0) /* UART enabled */ #define UCR2_ESCI (1<<15) /* Escape seq interrupt enable */ @@ -163,8 +175,19 @@ #define UTS_SOFTRST (1<<0) /* Software reset */ /* We've been assigned a range on the "Low-density serial ports" major */ +#ifdef CONFIG_ARCH_IMX #define SERIAL_IMX_MAJOR 204 #define MINOR_START 41 +#define DEV_NAME "ttySMX" +#define MAX_INTERNAL_IRQ IMX_IRQS +#endif + +#if defined CONFIG_ARCH_MX3 || defined CONFIG_ARCH_MX2 +#define SERIAL_IMX_MAJOR 207 +#define MINOR_START 16 +#define DEV_NAME "ttymxc" +#define MAX_INTERNAL_IRQ MXC_MAX_INT_LINES +#endif /* * This determines how often we check the modem status signals @@ -176,12 +199,15 @@ #define DRIVER_NAME "IMX-uart" +#define UART_NR 8 + struct imx_port { struct uart_port port; struct timer_list timer; unsigned int old_status; int txirq,rxirq,rtsirq; int have_rtscts:1; + struct clk *clk; }; /* @@ -405,6 +431,26 @@ out: return IRQ_HANDLED; } +static irqreturn_t imx_int(int irq, void *dev_id) +{ + struct imx_port *sport = dev_id; + unsigned int sts; + + sts = readl(sport->port.membase + USR1); + + if (sts & USR1_RRDY) + imx_rxint(irq, dev_id); + + if (sts & USR1_TRDY && + readl(sport->port.membase + UCR1) & UCR1_TXMPTYEN) + imx_txint(irq, dev_id); + + if (sts & USR1_RTSS) + imx_rtsint(irq, dev_id); + + return IRQ_HANDLED; +} + /* * Return TIOCSER_TEMT when transmitter is not busy. */ @@ -477,7 +523,8 @@ static int imx_setup_ufcr(struct imx_port *sport, unsigned int mode) * RFDIV is set such way to satisfy requested uartclk value */ val = TXTL << 10 | RXTL; - ufcr_rfdiv = (imx_get_perclk1() + sport->port.uartclk / 2) / sport->port.uartclk; + ufcr_rfdiv = (clk_get_rate(sport->clk) + sport->port.uartclk / 2) + / sport->port.uartclk; if(!ufcr_rfdiv) ufcr_rfdiv = 1; @@ -509,21 +556,34 @@ static int imx_startup(struct uart_port *port) writel(temp & ~UCR4_DREN, sport->port.membase + UCR4); /* - * Allocate the IRQ + * Allocate the IRQ(s) i.MX1 has three interrupts whereas later + * chips only have one interrupt. */ - retval = request_irq(sport->rxirq, imx_rxint, 0, - DRIVER_NAME, sport); - if (retval) goto error_out1; - - retval = request_irq(sport->txirq, imx_txint, 0, - DRIVER_NAME, sport); - if (retval) goto error_out2; - - retval = request_irq(sport->rtsirq, imx_rtsint, - (sport->rtsirq < IMX_IRQS) ? 0 : + if (sport->txirq > 0) { + retval = request_irq(sport->rxirq, imx_rxint, 0, + DRIVER_NAME, sport); + if (retval) + goto error_out1; + + retval = request_irq(sport->txirq, imx_txint, 0, + DRIVER_NAME, sport); + if (retval) + goto error_out2; + + retval = request_irq(sport->rtsirq, imx_rtsint, + (sport->rtsirq < MAX_INTERNAL_IRQ) ? 0 : IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, - DRIVER_NAME, sport); - if (retval) goto error_out3; + DRIVER_NAME, sport); + if (retval) + goto error_out3; + } else { + retval = request_irq(sport->port.irq, imx_int, 0, + DRIVER_NAME, sport); + if (retval) { + free_irq(sport->port.irq, sport); + goto error_out1; + } + } /* * Finally, clear and enable interrupts @@ -548,9 +608,11 @@ static int imx_startup(struct uart_port *port) return 0; error_out3: - free_irq(sport->txirq, sport); + if (sport->txirq) + free_irq(sport->txirq, sport); error_out2: - free_irq(sport->rxirq, sport); + if (sport->rxirq) + free_irq(sport->rxirq, sport); error_out1: return retval; } @@ -568,9 +630,12 @@ static void imx_shutdown(struct uart_port *port) /* * Free the interrupts */ - free_irq(sport->rtsirq, sport); - free_irq(sport->txirq, sport); - free_irq(sport->rxirq, sport); + if (sport->txirq > 0) { + free_irq(sport->rtsirq, sport); + free_irq(sport->txirq, sport); + free_irq(sport->rxirq, sport); + } else + free_irq(sport->port.irq, sport); /* * Disable all interrupts, port and break condition. @@ -589,6 +654,7 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, unsigned long flags; unsigned int ucr2, old_ucr1, old_txrxen, baud, quot; unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; + unsigned int div, num, denom, ufcr; /* * If we don't support modem control lines, don't allow @@ -634,7 +700,7 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, /* * Ask the core to calculate the divisor for us. */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); + baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16); quot = uart_get_divisor(port, baud); spin_lock_irqsave(&sport->port.lock, flags); @@ -684,14 +750,41 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, sport->port.membase + UCR2); old_txrxen &= (UCR2_TXEN | UCR2_RXEN); - /* set the baud rate. We assume uartclk = 16 MHz - * - * baud * 16 UBIR - 1 - * --------- = -------- - * uartclk UBMR - 1 - */ - writel((baud / 100) - 1, sport->port.membase + UBIR); - writel(10000 - 1, sport->port.membase + UBMR); + div = sport->port.uartclk / (baud * 16); + if (div > 7) + div = 7; + if (!div) + div = 1; + + num = baud; + denom = port->uartclk / div / 16; + + /* shift num and denom right until they fit into 16 bits */ + while (num > 0x10000 || denom > 0x10000) { + num >>= 1; + denom >>= 1; + } + if (num > 0) + num -= 1; + if (denom > 0) + denom -= 1; + + writel(num, sport->port.membase + UBIR); + writel(denom, sport->port.membase + UBMR); + + if (div == 7) + div = 6; /* 6 in RFDIV means divide by 7 */ + else + div = 6 - div; + + ufcr = readl(sport->port.membase + UFCR); + ufcr = (ufcr & (~UFCR_RFDIV)) | + (div << 7); + writel(ufcr, sport->port.membase + UFCR); + +#ifdef ONEMS + writel(sport->port.uartclk / div / 1000, sport->port.membase + ONEMS); +#endif writel(old_ucr1, sport->port.membase + UCR1); @@ -801,65 +894,7 @@ static struct uart_ops imx_pops = { .verify_port = imx_verify_port, }; -static struct imx_port imx_ports[] = { - { - .txirq = UART1_MINT_TX, - .rxirq = UART1_MINT_RX, - .rtsirq = UART1_MINT_RTS, - .port = { - .type = PORT_IMX, - .iotype = UPIO_MEM, - .membase = (void *)IMX_UART1_BASE, - .mapbase = 0x00206000, - .irq = UART1_MINT_RX, - .uartclk = 16000000, - .fifosize = 32, - .flags = UPF_BOOT_AUTOCONF, - .ops = &imx_pops, - .line = 0, - }, - }, { - .txirq = UART2_MINT_TX, - .rxirq = UART2_MINT_RX, - .rtsirq = UART2_MINT_RTS, - .port = { - .type = PORT_IMX, - .iotype = UPIO_MEM, - .membase = (void *)IMX_UART2_BASE, - .mapbase = 0x00207000, - .irq = UART2_MINT_RX, - .uartclk = 16000000, - .fifosize = 32, - .flags = UPF_BOOT_AUTOCONF, - .ops = &imx_pops, - .line = 1, - }, - } -}; - -/* - * Setup the IMX serial ports. - * Note also that we support "console=ttySMXx" where "x" is either 0 or 1. - * Which serial port this ends up being depends on the machine you're - * running this kernel on. I'm not convinced that this is a good idea, - * but that's the way it traditionally works. - * - */ -static void __init imx_init_ports(void) -{ - static int first = 1; - int i; - - if (!first) - return; - first = 0; - - for (i = 0; i < ARRAY_SIZE(imx_ports); i++) { - init_timer(&imx_ports[i].timer); - imx_ports[i].timer.function = imx_timeout; - imx_ports[i].timer.data = (unsigned long)&imx_ports[i]; - } -} +static struct imx_port *imx_ports[UART_NR]; #ifdef CONFIG_SERIAL_IMX_CONSOLE static void imx_console_putchar(struct uart_port *port, int ch) @@ -878,7 +913,7 @@ static void imx_console_putchar(struct uart_port *port, int ch) static void imx_console_write(struct console *co, const char *s, unsigned int count) { - struct imx_port *sport = &imx_ports[co->index]; + struct imx_port *sport = imx_ports[co->index]; unsigned int old_ucr1, old_ucr2; /* @@ -944,7 +979,7 @@ imx_console_get_options(struct imx_port *sport, int *baud, else ucfr_rfdiv = 6 - ucfr_rfdiv; - uartclk = imx_get_perclk1(); + uartclk = clk_get_rate(sport->clk); uartclk /= ucfr_rfdiv; { /* @@ -984,7 +1019,7 @@ imx_console_setup(struct console *co, char *options) */ if (co->index == -1 || co->index >= ARRAY_SIZE(imx_ports)) co->index = 0; - sport = &imx_ports[co->index]; + sport = imx_ports[co->index]; if (options) uart_parse_options(options, &baud, &parity, &bits, &flow); @@ -998,7 +1033,7 @@ imx_console_setup(struct console *co, char *options) static struct uart_driver imx_reg; static struct console imx_console = { - .name = "ttySMX", + .name = DEV_NAME, .write = imx_console_write, .device = uart_console_device, .setup = imx_console_setup, @@ -1007,14 +1042,6 @@ static struct console imx_console = { .data = &imx_reg, }; -static int __init imx_rs_console_init(void) -{ - imx_init_ports(); - register_console(&imx_console); - return 0; -} -console_initcall(imx_rs_console_init); - #define IMX_CONSOLE &imx_console #else #define IMX_CONSOLE NULL @@ -1023,7 +1050,7 @@ console_initcall(imx_rs_console_init); static struct uart_driver imx_reg = { .owner = THIS_MODULE, .driver_name = DRIVER_NAME, - .dev_name = "ttySMX", + .dev_name = DEV_NAME, .major = SERIAL_IMX_MAJOR, .minor = MINOR_START, .nr = ARRAY_SIZE(imx_ports), @@ -1050,29 +1077,98 @@ static int serial_imx_resume(struct platform_device *dev) return 0; } -static int serial_imx_probe(struct platform_device *dev) +static int serial_imx_probe(struct platform_device *pdev) { + struct imx_port *sport; struct imxuart_platform_data *pdata; + void __iomem *base; + int ret = 0; + struct resource *res; + + sport = kzalloc(sizeof(*sport), GFP_KERNEL); + if (!sport) + return -ENOMEM; - imx_ports[dev->id].port.dev = &dev->dev; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + ret = -ENODEV; + goto free; + } + + base = ioremap(res->start, PAGE_SIZE); + if (!base) { + ret = -ENOMEM; + goto free; + } + + sport->port.dev = &pdev->dev; + sport->port.mapbase = res->start; + sport->port.membase = base; + sport->port.type = PORT_IMX, + sport->port.iotype = UPIO_MEM; + sport->port.irq = platform_get_irq(pdev, 0); + sport->rxirq = platform_get_irq(pdev, 0); + sport->txirq = platform_get_irq(pdev, 1); + sport->rtsirq = platform_get_irq(pdev, 2); + sport->port.fifosize = 32; + sport->port.ops = &imx_pops; + sport->port.flags = UPF_BOOT_AUTOCONF; + sport->port.line = pdev->id; + init_timer(&sport->timer); + sport->timer.function = imx_timeout; + sport->timer.data = (unsigned long)sport; + + sport->clk = clk_get(&pdev->dev, "uart_clk"); + if (IS_ERR(sport->clk)) { + ret = PTR_ERR(sport->clk); + goto unmap; + } + clk_enable(sport->clk); - pdata = (struct imxuart_platform_data *)dev->dev.platform_data; + sport->port.uartclk = clk_get_rate(sport->clk); + + imx_ports[pdev->id] = sport; + + pdata = pdev->dev.platform_data; if(pdata && (pdata->flags & IMXUART_HAVE_RTSCTS)) - imx_ports[dev->id].have_rtscts = 1; + sport->have_rtscts = 1; + + if (pdata->init) + pdata->init(pdev); + + uart_add_one_port(&imx_reg, &sport->port); + platform_set_drvdata(pdev, &sport->port); - uart_add_one_port(&imx_reg, &imx_ports[dev->id].port); - platform_set_drvdata(dev, &imx_ports[dev->id]); return 0; +unmap: + iounmap(sport->port.membase); +free: + kfree(sport); + + return ret; } -static int serial_imx_remove(struct platform_device *dev) +static int serial_imx_remove(struct platform_device *pdev) { - struct imx_port *sport = platform_get_drvdata(dev); + struct imxuart_platform_data *pdata; + struct imx_port *sport = platform_get_drvdata(pdev); - platform_set_drvdata(dev, NULL); + pdata = pdev->dev.platform_data; - if (sport) + platform_set_drvdata(pdev, NULL); + + if (sport) { uart_remove_one_port(&imx_reg, &sport->port); + clk_put(sport->clk); + } + + clk_disable(sport->clk); + + if (pdata->exit) + pdata->exit(pdev); + + iounmap(sport->port.membase); + kfree(sport); return 0; } @@ -1095,8 +1191,6 @@ static int __init imx_serial_init(void) printk(KERN_INFO "Serial: IMX driver\n"); - imx_init_ports(); - ret = uart_register_driver(&imx_reg); if (ret) return ret; diff --git a/drivers/serial/of_serial.c b/drivers/serial/of_serial.c index 25029c7570b6..8fa0ff561e9f 100644 --- a/drivers/serial/of_serial.c +++ b/drivers/serial/of_serial.c @@ -13,8 +13,8 @@ #include <linux/module.h> #include <linux/serial_core.h> #include <linux/serial_8250.h> +#include <linux/of_platform.h> -#include <asm/of_platform.h> #include <asm/prom.h> struct of_serial_info { diff --git a/drivers/serial/s3c2400.c b/drivers/serial/s3c2400.c new file mode 100644 index 000000000000..a1102053e553 --- /dev/null +++ b/drivers/serial/s3c2400.c @@ -0,0 +1,106 @@ +/* linux/drivers/serial/s3c240.c + * + * Driver for Samsung SoC onboard UARTs. + * + * Ben Dooks, Copyright (c) 2003-2005 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/platform_device.h> + +#include <asm/irq.h> + +#include <asm/hardware.h> + +#include <asm/plat-s3c/regs-serial.h> +#include <asm/arch/regs-gpio.h> + +#include "samsung.h" + +static int s3c2400_serial_getsource(struct uart_port *port, + struct s3c24xx_uart_clksrc *clk) +{ + clk->divisor = 1; + clk->name = "pclk"; + + return 0; +} + +static int s3c2400_serial_setsource(struct uart_port *port, + struct s3c24xx_uart_clksrc *clk) +{ + return 0; +} + +static int s3c2400_serial_resetport(struct uart_port *port, + struct s3c2410_uartcfg *cfg) +{ + dbg("s3c2400_serial_resetport: port=%p (%08lx), cfg=%p\n", + port, port->mapbase, cfg); + + wr_regl(port, S3C2410_UCON, cfg->ucon); + wr_regl(port, S3C2410_ULCON, cfg->ulcon); + + /* reset both fifos */ + + wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); + wr_regl(port, S3C2410_UFCON, cfg->ufcon); + + return 0; +} + +static struct s3c24xx_uart_info s3c2400_uart_inf = { + .name = "Samsung S3C2400 UART", + .type = PORT_S3C2400, + .fifosize = 16, + .rx_fifomask = S3C2410_UFSTAT_RXMASK, + .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT, + .rx_fifofull = S3C2410_UFSTAT_RXFULL, + .tx_fifofull = S3C2410_UFSTAT_TXFULL, + .tx_fifomask = S3C2410_UFSTAT_TXMASK, + .tx_fifoshift = S3C2410_UFSTAT_TXSHIFT, + .get_clksrc = s3c2400_serial_getsource, + .set_clksrc = s3c2400_serial_setsource, + .reset_port = s3c2400_serial_resetport, +}; + +static int s3c2400_serial_probe(struct platform_device *dev) +{ + return s3c24xx_serial_probe(dev, &s3c2400_uart_inf); +} + +static struct platform_driver s3c2400_serial_drv = { + .probe = s3c2400_serial_probe, + .remove = s3c24xx_serial_remove, + .driver = { + .name = "s3c2400-uart", + .owner = THIS_MODULE, + }, +}; + +s3c24xx_console_init(&s3c2400_serial_drv, &s3c2400_uart_inf); + +static inline int s3c2400_serial_init(void) +{ + return s3c24xx_serial_init(&s3c2400_serial_drv, &s3c2400_uart_inf); +} + +static inline void s3c2400_serial_exit(void) +{ + platform_driver_unregister(&s3c2400_serial_drv); +} + +module_init(s3c2400_serial_init); +module_exit(s3c2400_serial_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); +MODULE_DESCRIPTION("Samsung S3C2400 SoC Serial port driver"); +MODULE_ALIAS("platform:s3c2400-uart"); diff --git a/drivers/serial/s3c2410.c b/drivers/serial/s3c2410.c index 2b6a013639e6..c5f03f41686f 100644 --- a/drivers/serial/s3c2410.c +++ b/drivers/serial/s3c2410.c @@ -1,1270 +1,30 @@ -/* - * linux/drivers/serial/s3c2410.c +/* linux/drivers/serial/s3c2410.c * - * Driver for onboard UARTs on the Samsung S3C24XX + * Driver for Samsung S3C2410 SoC onboard UARTs. * - * Based on drivers/char/serial.c and drivers/char/21285.c + * Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ * - * Ben Dooks, (c) 2003-2005 Simtec Electronics - * http://www.simtec.co.uk/products/SWLINUX/ - * - * Changelog: - * - * 22-Jul-2004 BJD Finished off device rewrite - * - * 21-Jul-2004 BJD Thanks to <herbet@13thfloor.at> for pointing out - * problems with baud rate and loss of IR settings. Update - * to add configuration via platform_device structure - * - * 28-Sep-2004 BJD Re-write for the following items - * - S3C2410 and S3C2440 serial support - * - Power Management support - * - Fix console via IrDA devices - * - SysReq (Herbert Pötzl) - * - Break character handling (Herbert Pötzl) - * - spin-lock initialisation (Dimitry Andric) - * - added clock control - * - updated init code to use platform_device info - * - * 06-Mar-2005 BJD Add s3c2440 fclk clock source - * - * 09-Mar-2005 BJD Add s3c2400 support - * - * 10-Mar-2005 LCVR Changed S3C2410_VA_UART to S3C24XX_VA_UART -*/ - -/* Note on 2440 fclk clock source handling - * - * Whilst it is possible to use the fclk as clock source, the method - * of properly switching too/from this is currently un-implemented, so - * whichever way is configured at startup is the one that will be used. -*/ - -/* Hote on 2410 error handling - * - * The s3c2410 manual has a love/hate affair with the contents of the - * UERSTAT register in the UART blocks, and keeps marking some of the - * error bits as reserved. Having checked with the s3c2410x01, - * it copes with BREAKs properly, so I am happy to ignore the RESERVED - * feature from the latter versions of the manual. - * - * If it becomes aparrent that latter versions of the 2410 remove these - * bits, then action will have to be taken to differentiate the versions - * and change the policy on BREAK - * - * BJD, 04-Nov-2004 + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. */ - -#if defined(CONFIG_SERIAL_S3C2410_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - #include <linux/module.h> #include <linux/ioport.h> +#include <linux/io.h> #include <linux/platform_device.h> #include <linux/init.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> #include <linux/serial_core.h> #include <linux/serial.h> -#include <linux/delay.h> -#include <linux/clk.h> -#include <asm/io.h> #include <asm/irq.h> - #include <asm/hardware.h> #include <asm/plat-s3c/regs-serial.h> #include <asm/arch/regs-gpio.h> -/* structures */ - -struct s3c24xx_uart_info { - char *name; - unsigned int type; - unsigned int fifosize; - unsigned long rx_fifomask; - unsigned long rx_fifoshift; - unsigned long rx_fifofull; - unsigned long tx_fifomask; - unsigned long tx_fifoshift; - unsigned long tx_fifofull; - - /* clock source control */ - - int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk); - int (*set_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk); - - /* uart controls */ - int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *); -}; - -struct s3c24xx_uart_port { - unsigned char rx_claimed; - unsigned char tx_claimed; - - struct s3c24xx_uart_info *info; - struct s3c24xx_uart_clksrc *clksrc; - struct clk *clk; - struct clk *baudclk; - struct uart_port port; -}; - - -/* configuration defines */ - -#if 0 -#if 1 -/* send debug to the low-level output routines */ - -extern void printascii(const char *); - -static void -s3c24xx_serial_dbg(const char *fmt, ...) -{ - va_list va; - char buff[256]; - - va_start(va, fmt); - vsprintf(buff, fmt, va); - va_end(va); - - printascii(buff); -} - -#define dbg(x...) s3c24xx_serial_dbg(x) - -#else -#define dbg(x...) printk(KERN_DEBUG "s3c24xx: "); -#endif -#else /* no debug */ -#define dbg(x...) do {} while(0) -#endif - -/* UART name and device definitions */ - -#define S3C24XX_SERIAL_NAME "ttySAC" -#define S3C24XX_SERIAL_MAJOR 204 -#define S3C24XX_SERIAL_MINOR 64 - - -/* conversion functions */ - -#define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev) -#define s3c24xx_dev_to_cfg(__dev) (struct s3c2410_uartcfg *)((__dev)->platform_data) - -/* we can support 3 uarts, but not always use them */ - -#ifdef CONFIG_CPU_S3C2400 -#define NR_PORTS (2) -#else -#define NR_PORTS (3) -#endif - -/* port irq numbers */ - -#define TX_IRQ(port) ((port)->irq + 1) -#define RX_IRQ(port) ((port)->irq) - -/* register access controls */ - -#define portaddr(port, reg) ((port)->membase + (reg)) - -#define rd_regb(port, reg) (__raw_readb(portaddr(port, reg))) -#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg))) - -#define wr_regb(port, reg, val) \ - do { __raw_writeb(val, portaddr(port, reg)); } while(0) - -#define wr_regl(port, reg, val) \ - do { __raw_writel(val, portaddr(port, reg)); } while(0) - -/* macros to change one thing to another */ - -#define tx_enabled(port) ((port)->unused[0]) -#define rx_enabled(port) ((port)->unused[1]) - -/* flag to ignore all characters comming in */ -#define RXSTAT_DUMMY_READ (0x10000000) - -static inline struct s3c24xx_uart_port *to_ourport(struct uart_port *port) -{ - return container_of(port, struct s3c24xx_uart_port, port); -} - -/* translate a port to the device name */ - -static inline const char *s3c24xx_serial_portname(struct uart_port *port) -{ - return to_platform_device(port->dev)->name; -} - -static int s3c24xx_serial_txempty_nofifo(struct uart_port *port) -{ - return (rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE); -} - -static void s3c24xx_serial_rx_enable(struct uart_port *port) -{ - unsigned long flags; - unsigned int ucon, ufcon; - int count = 10000; - - spin_lock_irqsave(&port->lock, flags); - - while (--count && !s3c24xx_serial_txempty_nofifo(port)) - udelay(100); - - ufcon = rd_regl(port, S3C2410_UFCON); - ufcon |= S3C2410_UFCON_RESETRX; - wr_regl(port, S3C2410_UFCON, ufcon); - - ucon = rd_regl(port, S3C2410_UCON); - ucon |= S3C2410_UCON_RXIRQMODE; - wr_regl(port, S3C2410_UCON, ucon); - - rx_enabled(port) = 1; - spin_unlock_irqrestore(&port->lock, flags); -} - -static void s3c24xx_serial_rx_disable(struct uart_port *port) -{ - unsigned long flags; - unsigned int ucon; - - spin_lock_irqsave(&port->lock, flags); - - ucon = rd_regl(port, S3C2410_UCON); - ucon &= ~S3C2410_UCON_RXIRQMODE; - wr_regl(port, S3C2410_UCON, ucon); - - rx_enabled(port) = 0; - spin_unlock_irqrestore(&port->lock, flags); -} - -static void s3c24xx_serial_stop_tx(struct uart_port *port) -{ - if (tx_enabled(port)) { - disable_irq(TX_IRQ(port)); - tx_enabled(port) = 0; - if (port->flags & UPF_CONS_FLOW) - s3c24xx_serial_rx_enable(port); - } -} - -static void s3c24xx_serial_start_tx(struct uart_port *port) -{ - if (!tx_enabled(port)) { - if (port->flags & UPF_CONS_FLOW) - s3c24xx_serial_rx_disable(port); - - enable_irq(TX_IRQ(port)); - tx_enabled(port) = 1; - } -} - - -static void s3c24xx_serial_stop_rx(struct uart_port *port) -{ - if (rx_enabled(port)) { - dbg("s3c24xx_serial_stop_rx: port=%p\n", port); - disable_irq(RX_IRQ(port)); - rx_enabled(port) = 0; - } -} - -static void s3c24xx_serial_enable_ms(struct uart_port *port) -{ -} - -static inline struct s3c24xx_uart_info *s3c24xx_port_to_info(struct uart_port *port) -{ - return to_ourport(port)->info; -} - -static inline struct s3c2410_uartcfg *s3c24xx_port_to_cfg(struct uart_port *port) -{ - if (port->dev == NULL) - return NULL; - - return (struct s3c2410_uartcfg *)port->dev->platform_data; -} - -static int s3c24xx_serial_rx_fifocnt(struct s3c24xx_uart_port *ourport, - unsigned long ufstat) -{ - struct s3c24xx_uart_info *info = ourport->info; - - if (ufstat & info->rx_fifofull) - return info->fifosize; - - return (ufstat & info->rx_fifomask) >> info->rx_fifoshift; -} - - -/* ? - where has parity gone?? */ -#define S3C2410_UERSTAT_PARITY (0x1000) - -static irqreturn_t -s3c24xx_serial_rx_chars(int irq, void *dev_id) -{ - struct s3c24xx_uart_port *ourport = dev_id; - struct uart_port *port = &ourport->port; - struct tty_struct *tty = port->info->tty; - unsigned int ufcon, ch, flag, ufstat, uerstat; - int max_count = 64; - - while (max_count-- > 0) { - ufcon = rd_regl(port, S3C2410_UFCON); - ufstat = rd_regl(port, S3C2410_UFSTAT); - - if (s3c24xx_serial_rx_fifocnt(ourport, ufstat) == 0) - break; - - uerstat = rd_regl(port, S3C2410_UERSTAT); - ch = rd_regb(port, S3C2410_URXH); - - if (port->flags & UPF_CONS_FLOW) { - int txe = s3c24xx_serial_txempty_nofifo(port); - - if (rx_enabled(port)) { - if (!txe) { - rx_enabled(port) = 0; - continue; - } - } else { - if (txe) { - ufcon |= S3C2410_UFCON_RESETRX; - wr_regl(port, S3C2410_UFCON, ufcon); - rx_enabled(port) = 1; - goto out; - } - continue; - } - } - - /* insert the character into the buffer */ - - flag = TTY_NORMAL; - port->icount.rx++; - - if (unlikely(uerstat & S3C2410_UERSTAT_ANY)) { - dbg("rxerr: port ch=0x%02x, rxs=0x%08x\n", - ch, uerstat); - - /* check for break */ - if (uerstat & S3C2410_UERSTAT_BREAK) { - dbg("break!\n"); - port->icount.brk++; - if (uart_handle_break(port)) - goto ignore_char; - } - - if (uerstat & S3C2410_UERSTAT_FRAME) - port->icount.frame++; - if (uerstat & S3C2410_UERSTAT_OVERRUN) - port->icount.overrun++; - - uerstat &= port->read_status_mask; - - if (uerstat & S3C2410_UERSTAT_BREAK) - flag = TTY_BREAK; - else if (uerstat & S3C2410_UERSTAT_PARITY) - flag = TTY_PARITY; - else if (uerstat & ( S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_OVERRUN)) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, ch)) - goto ignore_char; - - uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN, ch, flag); - - ignore_char: - continue; - } - tty_flip_buffer_push(tty); - - out: - return IRQ_HANDLED; -} - -static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id) -{ - struct s3c24xx_uart_port *ourport = id; - struct uart_port *port = &ourport->port; - struct circ_buf *xmit = &port->info->xmit; - int count = 256; - - if (port->x_char) { - wr_regb(port, S3C2410_UTXH, port->x_char); - port->icount.tx++; - port->x_char = 0; - goto out; - } - - /* if there isnt anything more to transmit, or the uart is now - * stopped, disable the uart and exit - */ - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - s3c24xx_serial_stop_tx(port); - goto out; - } - - /* try and drain the buffer... */ - - while (!uart_circ_empty(xmit) && count-- > 0) { - if (rd_regl(port, S3C2410_UFSTAT) & ourport->info->tx_fifofull) - break; - - wr_regb(port, S3C2410_UTXH, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - s3c24xx_serial_stop_tx(port); - - out: - return IRQ_HANDLED; -} - -static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned long ufstat = rd_regl(port, S3C2410_UFSTAT); - unsigned long ufcon = rd_regl(port, S3C2410_UFCON); - - if (ufcon & S3C2410_UFCON_FIFOMODE) { - if ((ufstat & info->tx_fifomask) != 0 || - (ufstat & info->tx_fifofull)) - return 0; - - return 1; - } - - return s3c24xx_serial_txempty_nofifo(port); -} - -/* no modem control lines */ -static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port) -{ - unsigned int umstat = rd_regb(port,S3C2410_UMSTAT); - - if (umstat & S3C2410_UMSTAT_CTS) - return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; - else - return TIOCM_CAR | TIOCM_DSR; -} - -static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - /* todo - possibly remove AFC and do manual CTS */ -} - -static void s3c24xx_serial_break_ctl(struct uart_port *port, int break_state) -{ - unsigned long flags; - unsigned int ucon; - - spin_lock_irqsave(&port->lock, flags); - - ucon = rd_regl(port, S3C2410_UCON); - - if (break_state) - ucon |= S3C2410_UCON_SBREAK; - else - ucon &= ~S3C2410_UCON_SBREAK; - - wr_regl(port, S3C2410_UCON, ucon); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void s3c24xx_serial_shutdown(struct uart_port *port) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - - if (ourport->tx_claimed) { - free_irq(TX_IRQ(port), ourport); - tx_enabled(port) = 0; - ourport->tx_claimed = 0; - } - - if (ourport->rx_claimed) { - free_irq(RX_IRQ(port), ourport); - ourport->rx_claimed = 0; - rx_enabled(port) = 0; - } -} - - -static int s3c24xx_serial_startup(struct uart_port *port) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - int ret; - - dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n", - port->mapbase, port->membase); - - rx_enabled(port) = 1; - - ret = request_irq(RX_IRQ(port), - s3c24xx_serial_rx_chars, 0, - s3c24xx_serial_portname(port), ourport); - - if (ret != 0) { - printk(KERN_ERR "cannot get irq %d\n", RX_IRQ(port)); - return ret; - } - - ourport->rx_claimed = 1; - - dbg("requesting tx irq...\n"); - - tx_enabled(port) = 1; - - ret = request_irq(TX_IRQ(port), - s3c24xx_serial_tx_chars, 0, - s3c24xx_serial_portname(port), ourport); - - if (ret) { - printk(KERN_ERR "cannot get irq %d\n", TX_IRQ(port)); - goto err; - } - - ourport->tx_claimed = 1; - - dbg("s3c24xx_serial_startup ok\n"); - - /* the port reset code should have done the correct - * register setup for the port controls */ - - return ret; - - err: - s3c24xx_serial_shutdown(port); - return ret; -} - -/* power power management control */ - -static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, - unsigned int old) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - - switch (level) { - case 3: - if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) - clk_disable(ourport->baudclk); - - clk_disable(ourport->clk); - break; - - case 0: - clk_enable(ourport->clk); - - if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) - clk_enable(ourport->baudclk); - - break; - default: - printk(KERN_ERR "s3c24xx_serial: unknown pm %d\n", level); - } -} - -/* baud rate calculation - * - * The UARTs on the S3C2410/S3C2440 can take their clocks from a number - * of different sources, including the peripheral clock ("pclk") and an - * external clock ("uclk"). The S3C2440 also adds the core clock ("fclk") - * with a programmable extra divisor. - * - * The following code goes through the clock sources, and calculates the - * baud clocks (and the resultant actual baud rates) and then tries to - * pick the closest one and select that. - * -*/ - - -#define MAX_CLKS (8) - -static struct s3c24xx_uart_clksrc tmp_clksrc = { - .name = "pclk", - .min_baud = 0, - .max_baud = 0, - .divisor = 1, -}; - -static inline int -s3c24xx_serial_getsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - return (info->get_clksrc)(port, c); -} - -static inline int -s3c24xx_serial_setsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - return (info->set_clksrc)(port, c); -} - -struct baud_calc { - struct s3c24xx_uart_clksrc *clksrc; - unsigned int calc; - unsigned int quot; - struct clk *src; -}; - -static int s3c24xx_serial_calcbaud(struct baud_calc *calc, - struct uart_port *port, - struct s3c24xx_uart_clksrc *clksrc, - unsigned int baud) -{ - unsigned long rate; - - calc->src = clk_get(port->dev, clksrc->name); - if (calc->src == NULL || IS_ERR(calc->src)) - return 0; - - rate = clk_get_rate(calc->src); - rate /= clksrc->divisor; - - calc->clksrc = clksrc; - calc->quot = (rate + (8 * baud)) / (16 * baud); - calc->calc = (rate / (calc->quot * 16)); - - calc->quot--; - return 1; -} - -static unsigned int s3c24xx_serial_getclk(struct uart_port *port, - struct s3c24xx_uart_clksrc **clksrc, - struct clk **clk, - unsigned int baud) -{ - struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port); - struct s3c24xx_uart_clksrc *clkp; - struct baud_calc res[MAX_CLKS]; - struct baud_calc *resptr, *best, *sptr; - int i; - - clkp = cfg->clocks; - best = NULL; - - if (cfg->clocks_size < 2) { - if (cfg->clocks_size == 0) - clkp = &tmp_clksrc; - - /* check to see if we're sourcing fclk, and if so we're - * going to have to update the clock source - */ - - if (strcmp(clkp->name, "fclk") == 0) { - struct s3c24xx_uart_clksrc src; - - s3c24xx_serial_getsource(port, &src); - - /* check that the port already using fclk, and if - * not, then re-select fclk - */ - - if (strcmp(src.name, clkp->name) == 0) { - s3c24xx_serial_setsource(port, clkp); - s3c24xx_serial_getsource(port, &src); - } - - clkp->divisor = src.divisor; - } - - s3c24xx_serial_calcbaud(res, port, clkp, baud); - best = res; - resptr = best + 1; - } else { - resptr = res; - - for (i = 0; i < cfg->clocks_size; i++, clkp++) { - if (s3c24xx_serial_calcbaud(resptr, port, clkp, baud)) - resptr++; - } - } - - /* ok, we now need to select the best clock we found */ - - if (!best) { - unsigned int deviation = (1<<30)|((1<<30)-1); - int calc_deviation; - - for (sptr = res; sptr < resptr; sptr++) { - printk(KERN_DEBUG - "found clk %p (%s) quot %d, calc %d\n", - sptr->clksrc, sptr->clksrc->name, - sptr->quot, sptr->calc); - - calc_deviation = baud - sptr->calc; - if (calc_deviation < 0) - calc_deviation = -calc_deviation; - - if (calc_deviation < deviation) { - best = sptr; - deviation = calc_deviation; - } - } - - printk(KERN_DEBUG "best %p (deviation %d)\n", best, deviation); - } - - printk(KERN_DEBUG "selected clock %p (%s) quot %d, calc %d\n", - best->clksrc, best->clksrc->name, best->quot, best->calc); - - /* store results to pass back */ - - *clksrc = best->clksrc; - *clk = best->src; - - return best->quot; -} - -static void s3c24xx_serial_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port); - struct s3c24xx_uart_port *ourport = to_ourport(port); - struct s3c24xx_uart_clksrc *clksrc = NULL; - struct clk *clk = NULL; - unsigned long flags; - unsigned int baud, quot; - unsigned int ulcon; - unsigned int umcon; - - /* - * We don't support modem control lines. - */ - termios->c_cflag &= ~(HUPCL | CMSPAR); - termios->c_cflag |= CLOCAL; - - /* - * Ask the core to calculate the divisor for us. - */ - - baud = uart_get_baud_rate(port, termios, old, 0, 115200*8); - - if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST) - quot = port->custom_divisor; - else - quot = s3c24xx_serial_getclk(port, &clksrc, &clk, baud); - - /* check to see if we need to change clock source */ - - if (ourport->clksrc != clksrc || ourport->baudclk != clk) { - s3c24xx_serial_setsource(port, clksrc); - - if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) { - clk_disable(ourport->baudclk); - ourport->baudclk = NULL; - } - - clk_enable(clk); - - ourport->clksrc = clksrc; - ourport->baudclk = clk; - } - - switch (termios->c_cflag & CSIZE) { - case CS5: - dbg("config: 5bits/char\n"); - ulcon = S3C2410_LCON_CS5; - break; - case CS6: - dbg("config: 6bits/char\n"); - ulcon = S3C2410_LCON_CS6; - break; - case CS7: - dbg("config: 7bits/char\n"); - ulcon = S3C2410_LCON_CS7; - break; - case CS8: - default: - dbg("config: 8bits/char\n"); - ulcon = S3C2410_LCON_CS8; - break; - } - - /* preserve original lcon IR settings */ - ulcon |= (cfg->ulcon & S3C2410_LCON_IRM); - - if (termios->c_cflag & CSTOPB) - ulcon |= S3C2410_LCON_STOPB; - - umcon = (termios->c_cflag & CRTSCTS) ? S3C2410_UMCOM_AFC : 0; - - if (termios->c_cflag & PARENB) { - if (termios->c_cflag & PARODD) - ulcon |= S3C2410_LCON_PODD; - else - ulcon |= S3C2410_LCON_PEVEN; - } else { - ulcon |= S3C2410_LCON_PNONE; - } - - spin_lock_irqsave(&port->lock, flags); - - dbg("setting ulcon to %08x, brddiv to %d\n", ulcon, quot); - - wr_regl(port, S3C2410_ULCON, ulcon); - wr_regl(port, S3C2410_UBRDIV, quot); - wr_regl(port, S3C2410_UMCON, umcon); - - dbg("uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n", - rd_regl(port, S3C2410_ULCON), - rd_regl(port, S3C2410_UCON), - rd_regl(port, S3C2410_UFCON)); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * Which character status flags are we interested in? - */ - port->read_status_mask = S3C2410_UERSTAT_OVERRUN; - if (termios->c_iflag & INPCK) - port->read_status_mask |= S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_PARITY; - - /* - * Which character status flags should we ignore? - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= S3C2410_UERSTAT_OVERRUN; - if (termios->c_iflag & IGNBRK && termios->c_iflag & IGNPAR) - port->ignore_status_mask |= S3C2410_UERSTAT_FRAME; - - /* - * Ignore all characters if CREAD is not set. - */ - if ((termios->c_cflag & CREAD) == 0) - port->ignore_status_mask |= RXSTAT_DUMMY_READ; - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *s3c24xx_serial_type(struct uart_port *port) -{ - switch (port->type) { - case PORT_S3C2410: - return "S3C2410"; - case PORT_S3C2440: - return "S3C2440"; - case PORT_S3C2412: - return "S3C2412"; - default: - return NULL; - } -} - -#define MAP_SIZE (0x100) - -static void s3c24xx_serial_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, MAP_SIZE); -} - -static int s3c24xx_serial_request_port(struct uart_port *port) -{ - const char *name = s3c24xx_serial_portname(port); - return request_mem_region(port->mapbase, MAP_SIZE, name) ? 0 : -EBUSY; -} - -static void s3c24xx_serial_config_port(struct uart_port *port, int flags) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - if (flags & UART_CONFIG_TYPE && - s3c24xx_serial_request_port(port) == 0) - port->type = info->type; -} - -/* - * verify the new serial_struct (for TIOCSSERIAL). - */ -static int -s3c24xx_serial_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - if (ser->type != PORT_UNKNOWN && ser->type != info->type) - return -EINVAL; - - return 0; -} - - -#ifdef CONFIG_SERIAL_S3C2410_CONSOLE - -static struct console s3c24xx_serial_console; - -#define S3C24XX_SERIAL_CONSOLE &s3c24xx_serial_console -#else -#define S3C24XX_SERIAL_CONSOLE NULL -#endif - -static struct uart_ops s3c24xx_serial_ops = { - .pm = s3c24xx_serial_pm, - .tx_empty = s3c24xx_serial_tx_empty, - .get_mctrl = s3c24xx_serial_get_mctrl, - .set_mctrl = s3c24xx_serial_set_mctrl, - .stop_tx = s3c24xx_serial_stop_tx, - .start_tx = s3c24xx_serial_start_tx, - .stop_rx = s3c24xx_serial_stop_rx, - .enable_ms = s3c24xx_serial_enable_ms, - .break_ctl = s3c24xx_serial_break_ctl, - .startup = s3c24xx_serial_startup, - .shutdown = s3c24xx_serial_shutdown, - .set_termios = s3c24xx_serial_set_termios, - .type = s3c24xx_serial_type, - .release_port = s3c24xx_serial_release_port, - .request_port = s3c24xx_serial_request_port, - .config_port = s3c24xx_serial_config_port, - .verify_port = s3c24xx_serial_verify_port, -}; - - -static struct uart_driver s3c24xx_uart_drv = { - .owner = THIS_MODULE, - .dev_name = "s3c2410_serial", - .nr = 3, - .cons = S3C24XX_SERIAL_CONSOLE, - .driver_name = S3C24XX_SERIAL_NAME, - .major = S3C24XX_SERIAL_MAJOR, - .minor = S3C24XX_SERIAL_MINOR, -}; - -static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = { - [0] = { - .port = { - .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock), - .iotype = UPIO_MEM, - .irq = IRQ_S3CUART_RX0, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 0, - } - }, - [1] = { - .port = { - .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[1].port.lock), - .iotype = UPIO_MEM, - .irq = IRQ_S3CUART_RX1, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 1, - } - }, -#if NR_PORTS > 2 - - [2] = { - .port = { - .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[2].port.lock), - .iotype = UPIO_MEM, - .irq = IRQ_S3CUART_RX2, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 2, - } - } -#endif -}; - -/* s3c24xx_serial_resetport - * - * wrapper to call the specific reset for this port (reset the fifos - * and the settings) -*/ - -static inline int s3c24xx_serial_resetport(struct uart_port * port, - struct s3c2410_uartcfg *cfg) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - return (info->reset_port)(port, cfg); -} - -/* s3c24xx_serial_init_port - * - * initialise a single serial port from the platform device given - */ - -static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, - struct s3c24xx_uart_info *info, - struct platform_device *platdev) -{ - struct uart_port *port = &ourport->port; - struct s3c2410_uartcfg *cfg; - struct resource *res; - int ret; - - dbg("s3c24xx_serial_init_port: port=%p, platdev=%p\n", port, platdev); - - if (platdev == NULL) - return -ENODEV; - - cfg = s3c24xx_dev_to_cfg(&platdev->dev); - - if (port->mapbase != 0) - return 0; - - if (cfg->hwport > 3) - return -EINVAL; - - /* setup info for port */ - port->dev = &platdev->dev; - ourport->info = info; - - /* copy the info in from provided structure */ - ourport->port.fifosize = info->fifosize; - - dbg("s3c24xx_serial_init_port: %p (hw %d)...\n", port, cfg->hwport); - - port->uartclk = 1; - - if (cfg->uart_flags & UPF_CONS_FLOW) { - dbg("s3c24xx_serial_init_port: enabling flow control\n"); - port->flags |= UPF_CONS_FLOW; - } - - /* sort our the physical and virtual addresses for each UART */ - - res = platform_get_resource(platdev, IORESOURCE_MEM, 0); - if (res == NULL) { - printk(KERN_ERR "failed to find memory resource for uart\n"); - return -EINVAL; - } - - dbg("resource %p (%lx..%lx)\n", res, res->start, res->end); - - port->mapbase = res->start; - port->membase = S3C24XX_VA_UART + (res->start - S3C24XX_PA_UART); - ret = platform_get_irq(platdev, 0); - if (ret < 0) - port->irq = 0; - else - port->irq = ret; - - ourport->clk = clk_get(&platdev->dev, "uart"); - - dbg("port: map=%08x, mem=%08x, irq=%d, clock=%ld\n", - port->mapbase, port->membase, port->irq, port->uartclk); - - /* reset the fifos (and setup the uart) */ - s3c24xx_serial_resetport(port, cfg); - return 0; -} - -/* Device driver serial port probe */ - -static int probe_index = 0; - -static int s3c24xx_serial_probe(struct platform_device *dev, - struct s3c24xx_uart_info *info) -{ - struct s3c24xx_uart_port *ourport; - int ret; - - dbg("s3c24xx_serial_probe(%p, %p) %d\n", dev, info, probe_index); - - ourport = &s3c24xx_serial_ports[probe_index]; - probe_index++; - - dbg("%s: initialising port %p...\n", __func__, ourport); - - ret = s3c24xx_serial_init_port(ourport, info, dev); - if (ret < 0) - goto probe_err; - - dbg("%s: adding port\n", __func__); - uart_add_one_port(&s3c24xx_uart_drv, &ourport->port); - platform_set_drvdata(dev, &ourport->port); - - return 0; - - probe_err: - return ret; -} - -static int s3c24xx_serial_remove(struct platform_device *dev) -{ - struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); - - if (port) - uart_remove_one_port(&s3c24xx_uart_drv, port); - - return 0; -} - -/* UART power management code */ - -#ifdef CONFIG_PM - -static int s3c24xx_serial_suspend(struct platform_device *dev, pm_message_t state) -{ - struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); - - if (port) - uart_suspend_port(&s3c24xx_uart_drv, port); - - return 0; -} - -static int s3c24xx_serial_resume(struct platform_device *dev) -{ - struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); - struct s3c24xx_uart_port *ourport = to_ourport(port); - - if (port) { - clk_enable(ourport->clk); - s3c24xx_serial_resetport(port, s3c24xx_port_to_cfg(port)); - clk_disable(ourport->clk); - - uart_resume_port(&s3c24xx_uart_drv, port); - } - - return 0; -} - -#else -#define s3c24xx_serial_suspend NULL -#define s3c24xx_serial_resume NULL -#endif - -static int s3c24xx_serial_init(struct platform_driver *drv, - struct s3c24xx_uart_info *info) -{ - dbg("s3c24xx_serial_init(%p,%p)\n", drv, info); - return platform_driver_register(drv); -} - - -/* now comes the code to initialise either the s3c2410 or s3c2440 serial - * port information -*/ - -/* cpu specific variations on the serial port support */ - -#ifdef CONFIG_CPU_S3C2400 - -static int s3c2400_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - clk->divisor = 1; - clk->name = "pclk"; - - return 0; -} - -static int s3c2400_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - return 0; -} - -static int s3c2400_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - dbg("s3c2400_serial_resetport: port=%p (%08lx), cfg=%p\n", - port, port->mapbase, cfg); - - wr_regl(port, S3C2410_UCON, cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c2400_uart_inf = { - .name = "Samsung S3C2400 UART", - .type = PORT_S3C2400, - .fifosize = 16, - .rx_fifomask = S3C2410_UFSTAT_RXMASK, - .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT, - .rx_fifofull = S3C2410_UFSTAT_RXFULL, - .tx_fifofull = S3C2410_UFSTAT_TXFULL, - .tx_fifomask = S3C2410_UFSTAT_TXMASK, - .tx_fifoshift = S3C2410_UFSTAT_TXSHIFT, - .get_clksrc = s3c2400_serial_getsource, - .set_clksrc = s3c2400_serial_setsource, - .reset_port = s3c2400_serial_resetport, -}; - -static int s3c2400_serial_probe(struct platform_device *dev) -{ - return s3c24xx_serial_probe(dev, &s3c2400_uart_inf); -} - -static struct platform_driver s3c2400_serial_drv = { - .probe = s3c2400_serial_probe, - .remove = s3c24xx_serial_remove, - .suspend = s3c24xx_serial_suspend, - .resume = s3c24xx_serial_resume, - .driver = { - .name = "s3c2400-uart", - .owner = THIS_MODULE, - }, -}; - -static inline int s3c2400_serial_init(void) -{ - return s3c24xx_serial_init(&s3c2400_serial_drv, &s3c2400_uart_inf); -} - -static inline void s3c2400_serial_exit(void) -{ - platform_driver_unregister(&s3c2400_serial_drv); -} - -#define s3c2400_uart_inf_at &s3c2400_uart_inf -#else - -static inline int s3c2400_serial_init(void) -{ - return 0; -} - -static inline void s3c2400_serial_exit(void) -{ -} - -#define s3c2400_uart_inf_at NULL - -#endif /* CONFIG_CPU_S3C2400 */ - -/* S3C2410 support */ - -#ifdef CONFIG_CPU_S3C2410 +#include "samsung.h" static int s3c2410_serial_setsource(struct uart_port *port, struct s3c24xx_uart_clksrc *clk) @@ -1323,8 +83,6 @@ static struct s3c24xx_uart_info s3c2410_uart_inf = { .reset_port = s3c2410_serial_resetport, }; -/* device management */ - static int s3c2410_serial_probe(struct platform_device *dev) { return s3c24xx_serial_probe(dev, &s3c2410_uart_inf); @@ -1333,612 +91,28 @@ static int s3c2410_serial_probe(struct platform_device *dev) static struct platform_driver s3c2410_serial_drv = { .probe = s3c2410_serial_probe, .remove = s3c24xx_serial_remove, - .suspend = s3c24xx_serial_suspend, - .resume = s3c24xx_serial_resume, .driver = { .name = "s3c2410-uart", .owner = THIS_MODULE, }, }; -static inline int s3c2410_serial_init(void) +s3c24xx_console_init(&s3c2410_serial_drv, &s3c2410_uart_inf); + +static int __init s3c2410_serial_init(void) { return s3c24xx_serial_init(&s3c2410_serial_drv, &s3c2410_uart_inf); } -static inline void s3c2410_serial_exit(void) +static void __exit s3c2410_serial_exit(void) { platform_driver_unregister(&s3c2410_serial_drv); } -#define s3c2410_uart_inf_at &s3c2410_uart_inf -#else - -static inline int s3c2410_serial_init(void) -{ - return 0; -} - -static inline void s3c2410_serial_exit(void) -{ -} - -#define s3c2410_uart_inf_at NULL - -#endif /* CONFIG_CPU_S3C2410 */ - -#if defined(CONFIG_CPU_S3C2440) || defined(CONFIG_CPU_S3C2442) - -static int s3c2440_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - // todo - proper fclk<>nonfclk switch // - - ucon &= ~S3C2440_UCON_CLKMASK; - - if (strcmp(clk->name, "uclk") == 0) - ucon |= S3C2440_UCON_UCLK; - else if (strcmp(clk->name, "pclk") == 0) - ucon |= S3C2440_UCON_PCLK; - else if (strcmp(clk->name, "fclk") == 0) - ucon |= S3C2440_UCON_FCLK; - else { - printk(KERN_ERR "unknown clock source %s\n", clk->name); - return -EINVAL; - } - - wr_regl(port, S3C2410_UCON, ucon); - return 0; -} - - -static int s3c2440_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - unsigned long ucon0, ucon1, ucon2; - - switch (ucon & S3C2440_UCON_CLKMASK) { - case S3C2440_UCON_UCLK: - clk->divisor = 1; - clk->name = "uclk"; - break; - - case S3C2440_UCON_PCLK: - case S3C2440_UCON_PCLK2: - clk->divisor = 1; - clk->name = "pclk"; - break; - - case S3C2440_UCON_FCLK: - /* the fun of calculating the uart divisors on - * the s3c2440 */ - - ucon0 = __raw_readl(S3C24XX_VA_UART0 + S3C2410_UCON); - ucon1 = __raw_readl(S3C24XX_VA_UART1 + S3C2410_UCON); - ucon2 = __raw_readl(S3C24XX_VA_UART2 + S3C2410_UCON); - - printk("ucons: %08lx, %08lx, %08lx\n", ucon0, ucon1, ucon2); - - ucon0 &= S3C2440_UCON0_DIVMASK; - ucon1 &= S3C2440_UCON1_DIVMASK; - ucon2 &= S3C2440_UCON2_DIVMASK; - - if (ucon0 != 0) { - clk->divisor = ucon0 >> S3C2440_UCON_DIVSHIFT; - clk->divisor += 6; - } else if (ucon1 != 0) { - clk->divisor = ucon1 >> S3C2440_UCON_DIVSHIFT; - clk->divisor += 21; - } else if (ucon2 != 0) { - clk->divisor = ucon2 >> S3C2440_UCON_DIVSHIFT; - clk->divisor += 36; - } else { - /* manual calims 44, seems to be 9 */ - clk->divisor = 9; - } - - clk->name = "fclk"; - break; - } - - return 0; -} - -static int s3c2440_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - dbg("s3c2440_serial_resetport: port=%p (%08lx), cfg=%p\n", - port, port->mapbase, cfg); - - /* ensure we don't change the clock settings... */ - - ucon &= (S3C2440_UCON0_DIVMASK | (3<<10)); - - wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c2440_uart_inf = { - .name = "Samsung S3C2440 UART", - .type = PORT_S3C2440, - .fifosize = 64, - .rx_fifomask = S3C2440_UFSTAT_RXMASK, - .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, - .rx_fifofull = S3C2440_UFSTAT_RXFULL, - .tx_fifofull = S3C2440_UFSTAT_TXFULL, - .tx_fifomask = S3C2440_UFSTAT_TXMASK, - .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, - .get_clksrc = s3c2440_serial_getsource, - .set_clksrc = s3c2440_serial_setsource, - .reset_port = s3c2440_serial_resetport, -}; - -/* device management */ - -static int s3c2440_serial_probe(struct platform_device *dev) -{ - dbg("s3c2440_serial_probe: dev=%p\n", dev); - return s3c24xx_serial_probe(dev, &s3c2440_uart_inf); -} - -static struct platform_driver s3c2440_serial_drv = { - .probe = s3c2440_serial_probe, - .remove = s3c24xx_serial_remove, - .suspend = s3c24xx_serial_suspend, - .resume = s3c24xx_serial_resume, - .driver = { - .name = "s3c2440-uart", - .owner = THIS_MODULE, - }, -}; - - -static inline int s3c2440_serial_init(void) -{ - return s3c24xx_serial_init(&s3c2440_serial_drv, &s3c2440_uart_inf); -} - -static inline void s3c2440_serial_exit(void) -{ - platform_driver_unregister(&s3c2440_serial_drv); -} - -#define s3c2440_uart_inf_at &s3c2440_uart_inf -#else - -static inline int s3c2440_serial_init(void) -{ - return 0; -} - -static inline void s3c2440_serial_exit(void) -{ -} - -#define s3c2440_uart_inf_at NULL -#endif /* CONFIG_CPU_S3C2440 */ - -#if defined(CONFIG_CPU_S3C2412) - -static int s3c2412_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - ucon &= ~S3C2412_UCON_CLKMASK; - - if (strcmp(clk->name, "uclk") == 0) - ucon |= S3C2440_UCON_UCLK; - else if (strcmp(clk->name, "pclk") == 0) - ucon |= S3C2440_UCON_PCLK; - else if (strcmp(clk->name, "usysclk") == 0) - ucon |= S3C2412_UCON_USYSCLK; - else { - printk(KERN_ERR "unknown clock source %s\n", clk->name); - return -EINVAL; - } - - wr_regl(port, S3C2410_UCON, ucon); - return 0; -} - - -static int s3c2412_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - switch (ucon & S3C2412_UCON_CLKMASK) { - case S3C2412_UCON_UCLK: - clk->divisor = 1; - clk->name = "uclk"; - break; - - case S3C2412_UCON_PCLK: - case S3C2412_UCON_PCLK2: - clk->divisor = 1; - clk->name = "pclk"; - break; - - case S3C2412_UCON_USYSCLK: - clk->divisor = 1; - clk->name = "usysclk"; - break; - } - - return 0; -} - -static int s3c2412_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - dbg("%s: port=%p (%08lx), cfg=%p\n", - __func__, port, port->mapbase, cfg); - - /* ensure we don't change the clock settings... */ - - ucon &= S3C2412_UCON_CLKMASK; - - wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c2412_uart_inf = { - .name = "Samsung S3C2412 UART", - .type = PORT_S3C2412, - .fifosize = 64, - .rx_fifomask = S3C2440_UFSTAT_RXMASK, - .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, - .rx_fifofull = S3C2440_UFSTAT_RXFULL, - .tx_fifofull = S3C2440_UFSTAT_TXFULL, - .tx_fifomask = S3C2440_UFSTAT_TXMASK, - .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, - .get_clksrc = s3c2412_serial_getsource, - .set_clksrc = s3c2412_serial_setsource, - .reset_port = s3c2412_serial_resetport, -}; - -/* device management */ - -static int s3c2412_serial_probe(struct platform_device *dev) -{ - dbg("s3c2440_serial_probe: dev=%p\n", dev); - return s3c24xx_serial_probe(dev, &s3c2412_uart_inf); -} - -static struct platform_driver s3c2412_serial_drv = { - .probe = s3c2412_serial_probe, - .remove = s3c24xx_serial_remove, - .suspend = s3c24xx_serial_suspend, - .resume = s3c24xx_serial_resume, - .driver = { - .name = "s3c2412-uart", - .owner = THIS_MODULE, - }, -}; - - -static inline int s3c2412_serial_init(void) -{ - return s3c24xx_serial_init(&s3c2412_serial_drv, &s3c2412_uart_inf); -} - -static inline void s3c2412_serial_exit(void) -{ - platform_driver_unregister(&s3c2412_serial_drv); -} - -#define s3c2412_uart_inf_at &s3c2412_uart_inf -#else - -static inline int s3c2412_serial_init(void) -{ - return 0; -} - -static inline void s3c2412_serial_exit(void) -{ -} - -#define s3c2412_uart_inf_at NULL -#endif /* CONFIG_CPU_S3C2440 */ - - -/* module initialisation code */ - -static int __init s3c24xx_serial_modinit(void) -{ - int ret; - - ret = uart_register_driver(&s3c24xx_uart_drv); - if (ret < 0) { - printk(KERN_ERR "failed to register UART driver\n"); - return -1; - } - - s3c2400_serial_init(); - s3c2410_serial_init(); - s3c2412_serial_init(); - s3c2440_serial_init(); - - return 0; -} - -static void __exit s3c24xx_serial_modexit(void) -{ - s3c2400_serial_exit(); - s3c2410_serial_exit(); - s3c2412_serial_exit(); - s3c2440_serial_exit(); - - uart_unregister_driver(&s3c24xx_uart_drv); -} - - -module_init(s3c24xx_serial_modinit); -module_exit(s3c24xx_serial_modexit); - -/* Console code */ - -#ifdef CONFIG_SERIAL_S3C2410_CONSOLE - -static struct uart_port *cons_uart; - -static int -s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned long ufstat, utrstat; - - if (ufcon & S3C2410_UFCON_FIFOMODE) { - /* fifo mode - check ammount of data in fifo registers... */ - - ufstat = rd_regl(port, S3C2410_UFSTAT); - return (ufstat & info->tx_fifofull) ? 0 : 1; - } - - /* in non-fifo mode, we go and use the tx buffer empty */ - - utrstat = rd_regl(port, S3C2410_UTRSTAT); - return (utrstat & S3C2410_UTRSTAT_TXE) ? 1 : 0; -} - -static void -s3c24xx_serial_console_putchar(struct uart_port *port, int ch) -{ - unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON); - while (!s3c24xx_serial_console_txrdy(port, ufcon)) - barrier(); - wr_regb(cons_uart, S3C2410_UTXH, ch); -} - -static void -s3c24xx_serial_console_write(struct console *co, const char *s, - unsigned int count) -{ - uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar); -} - -static void __init -s3c24xx_serial_get_options(struct uart_port *port, int *baud, - int *parity, int *bits) -{ - struct s3c24xx_uart_clksrc clksrc; - struct clk *clk; - unsigned int ulcon; - unsigned int ucon; - unsigned int ubrdiv; - unsigned long rate; - - ulcon = rd_regl(port, S3C2410_ULCON); - ucon = rd_regl(port, S3C2410_UCON); - ubrdiv = rd_regl(port, S3C2410_UBRDIV); - - dbg("s3c24xx_serial_get_options: port=%p\n" - "registers: ulcon=%08x, ucon=%08x, ubdriv=%08x\n", - port, ulcon, ucon, ubrdiv); - - if ((ucon & 0xf) != 0) { - /* consider the serial port configured if the tx/rx mode set */ - - switch (ulcon & S3C2410_LCON_CSMASK) { - case S3C2410_LCON_CS5: - *bits = 5; - break; - case S3C2410_LCON_CS6: - *bits = 6; - break; - case S3C2410_LCON_CS7: - *bits = 7; - break; - default: - case S3C2410_LCON_CS8: - *bits = 8; - break; - } - - switch (ulcon & S3C2410_LCON_PMASK) { - case S3C2410_LCON_PEVEN: - *parity = 'e'; - break; - - case S3C2410_LCON_PODD: - *parity = 'o'; - break; - - case S3C2410_LCON_PNONE: - default: - *parity = 'n'; - } - - /* now calculate the baud rate */ - - s3c24xx_serial_getsource(port, &clksrc); - - clk = clk_get(port->dev, clksrc.name); - if (!IS_ERR(clk) && clk != NULL) - rate = clk_get_rate(clk) / clksrc.divisor; - else - rate = 1; - - - *baud = rate / ( 16 * (ubrdiv + 1)); - dbg("calculated baud %d\n", *baud); - } - -} - -/* s3c24xx_serial_init_ports - * - * initialise the serial ports from the machine provided initialisation - * data. -*/ - -static int s3c24xx_serial_init_ports(struct s3c24xx_uart_info *info) -{ - struct s3c24xx_uart_port *ptr = s3c24xx_serial_ports; - struct platform_device **platdev_ptr; - int i; - - dbg("s3c24xx_serial_init_ports: initialising ports...\n"); - - platdev_ptr = s3c24xx_uart_devs; - - for (i = 0; i < NR_PORTS; i++, ptr++, platdev_ptr++) { - s3c24xx_serial_init_port(ptr, info, *platdev_ptr); - } - - return 0; -} - -static int __init -s3c24xx_serial_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - dbg("s3c24xx_serial_console_setup: co=%p (%d), %s\n", - co, co->index, options); - - /* is this a valid port */ - - if (co->index == -1 || co->index >= NR_PORTS) - co->index = 0; - - port = &s3c24xx_serial_ports[co->index].port; - - /* is the port configured? */ - - if (port->mapbase == 0x0) { - co->index = 0; - port = &s3c24xx_serial_ports[co->index].port; - } - - cons_uart = port; - - dbg("s3c24xx_serial_console_setup: port=%p (%d)\n", port, co->index); - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - s3c24xx_serial_get_options(port, &baud, &parity, &bits); - - dbg("s3c24xx_serial_console_setup: baud %d\n", baud); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -/* s3c24xx_serial_initconsole - * - * initialise the console from one of the uart drivers -*/ - -static struct console s3c24xx_serial_console = -{ - .name = S3C24XX_SERIAL_NAME, - .device = uart_console_device, - .flags = CON_PRINTBUFFER, - .index = -1, - .write = s3c24xx_serial_console_write, - .setup = s3c24xx_serial_console_setup -}; - -static int s3c24xx_serial_initconsole(void) -{ - struct s3c24xx_uart_info *info; - struct platform_device *dev = s3c24xx_uart_devs[0]; - - dbg("s3c24xx_serial_initconsole\n"); - - /* select driver based on the cpu */ - - if (dev == NULL) { - printk(KERN_ERR "s3c24xx: no devices for console init\n"); - return 0; - } - - if (strcmp(dev->name, "s3c2400-uart") == 0) { - info = s3c2400_uart_inf_at; - } else if (strcmp(dev->name, "s3c2410-uart") == 0) { - info = s3c2410_uart_inf_at; - } else if (strcmp(dev->name, "s3c2440-uart") == 0) { - info = s3c2440_uart_inf_at; - } else if (strcmp(dev->name, "s3c2412-uart") == 0) { - info = s3c2412_uart_inf_at; - } else { - printk(KERN_ERR "s3c24xx: no driver for %s\n", dev->name); - return 0; - } - - if (info == NULL) { - printk(KERN_ERR "s3c24xx: no driver for console\n"); - return 0; - } - - s3c24xx_serial_console.data = &s3c24xx_uart_drv; - s3c24xx_serial_init_ports(info); - - register_console(&s3c24xx_serial_console); - return 0; -} - -console_initcall(s3c24xx_serial_initconsole); - -#endif /* CONFIG_SERIAL_S3C2410_CONSOLE */ +module_init(s3c2410_serial_init); +module_exit(s3c2410_serial_exit); -MODULE_LICENSE("GPL"); +MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_DESCRIPTION("Samsung S3C2410/S3C2440/S3C2412 Serial port driver"); -MODULE_ALIAS("platform:s3c2400-uart"); +MODULE_DESCRIPTION("Samsung S3C2410 SoC Serial port driver"); MODULE_ALIAS("platform:s3c2410-uart"); -MODULE_ALIAS("platform:s3c2412-uart"); -MODULE_ALIAS("platform:s3c2440-uart"); diff --git a/drivers/serial/s3c2412.c b/drivers/serial/s3c2412.c new file mode 100644 index 000000000000..ce0c220e3e92 --- /dev/null +++ b/drivers/serial/s3c2412.c @@ -0,0 +1,151 @@ +/* linux/drivers/serial/s3c2412.c + * + * Driver for Samsung S3C2412 and S3C2413 SoC onboard UARTs. + * + * Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/serial_core.h> +#include <linux/serial.h> + +#include <asm/irq.h> +#include <asm/hardware.h> + +#include <asm/plat-s3c/regs-serial.h> +#include <asm/arch/regs-gpio.h> + +#include "samsung.h" + +static int s3c2412_serial_setsource(struct uart_port *port, + struct s3c24xx_uart_clksrc *clk) +{ + unsigned long ucon = rd_regl(port, S3C2410_UCON); + + ucon &= ~S3C2412_UCON_CLKMASK; + + if (strcmp(clk->name, "uclk") == 0) + ucon |= S3C2440_UCON_UCLK; + else if (strcmp(clk->name, "pclk") == 0) + ucon |= S3C2440_UCON_PCLK; + else if (strcmp(clk->name, "usysclk") == 0) + ucon |= S3C2412_UCON_USYSCLK; + else { + printk(KERN_ERR "unknown clock source %s\n", clk->name); + return -EINVAL; + } + + wr_regl(port, S3C2410_UCON, ucon); + return 0; +} + + +static int s3c2412_serial_getsource(struct uart_port *port, + struct s3c24xx_uart_clksrc *clk) +{ + unsigned long ucon = rd_regl(port, S3C2410_UCON); + + switch (ucon & S3C2412_UCON_CLKMASK) { + case S3C2412_UCON_UCLK: + clk->divisor = 1; + clk->name = "uclk"; + break; + + case S3C2412_UCON_PCLK: + case S3C2412_UCON_PCLK2: + clk->divisor = 1; + clk->name = "pclk"; + break; + + case S3C2412_UCON_USYSCLK: + clk->divisor = 1; + clk->name = "usysclk"; + break; + } + + return 0; +} + +static int s3c2412_serial_resetport(struct uart_port *port, + struct s3c2410_uartcfg *cfg) +{ + unsigned long ucon = rd_regl(port, S3C2410_UCON); + + dbg("%s: port=%p (%08lx), cfg=%p\n", + __func__, port, port->mapbase, cfg); + + /* ensure we don't change the clock settings... */ + + ucon &= S3C2412_UCON_CLKMASK; + + wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); + wr_regl(port, S3C2410_ULCON, cfg->ulcon); + + /* reset both fifos */ + + wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); + wr_regl(port, S3C2410_UFCON, cfg->ufcon); + + return 0; +} + +static struct s3c24xx_uart_info s3c2412_uart_inf = { + .name = "Samsung S3C2412 UART", + .type = PORT_S3C2412, + .fifosize = 64, + .rx_fifomask = S3C2440_UFSTAT_RXMASK, + .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, + .rx_fifofull = S3C2440_UFSTAT_RXFULL, + .tx_fifofull = S3C2440_UFSTAT_TXFULL, + .tx_fifomask = S3C2440_UFSTAT_TXMASK, + .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, + .get_clksrc = s3c2412_serial_getsource, + .set_clksrc = s3c2412_serial_setsource, + .reset_port = s3c2412_serial_resetport, +}; + +/* device management */ + +static int s3c2412_serial_probe(struct platform_device *dev) +{ + dbg("s3c2440_serial_probe: dev=%p\n", dev); + return s3c24xx_serial_probe(dev, &s3c2412_uart_inf); +} + +static struct platform_driver s3c2412_serial_drv = { + .probe = s3c2412_serial_probe, + .remove = s3c24xx_serial_remove, + .driver = { + .name = "s3c2412-uart", + .owner = THIS_MODULE, + }, +}; + +s3c24xx_console_init(&s3c2412_serial_drv, &s3c2412_uart_inf); + +static inline int s3c2412_serial_init(void) +{ + return s3c24xx_serial_init(&s3c2412_serial_drv, &s3c2412_uart_inf); +} + +static inline void s3c2412_serial_exit(void) +{ + platform_driver_unregister(&s3c2412_serial_drv); +} + +module_init(s3c2412_serial_init); +module_exit(s3c2412_serial_exit); + +MODULE_DESCRIPTION("Samsung S3C2412,S3C2413 SoC Serial port driver"); +MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:s3c2412-uart"); diff --git a/drivers/serial/s3c2440.c b/drivers/serial/s3c2440.c new file mode 100644 index 000000000000..38f954bd39c6 --- /dev/null +++ b/drivers/serial/s3c2440.c @@ -0,0 +1,181 @@ +/* linux/drivers/serial/s3c2440.c + * + * Driver for Samsung S3C2440 and S3C2442 SoC onboard UARTs. + * + * Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/serial_core.h> +#include <linux/serial.h> + +#include <asm/irq.h> +#include <asm/hardware.h> + +#include <asm/plat-s3c/regs-serial.h> +#include <asm/arch/regs-gpio.h> + +#include "samsung.h" + + +static int s3c2440_serial_setsource(struct uart_port *port, + struct s3c24xx_uart_clksrc *clk) +{ + unsigned long ucon = rd_regl(port, S3C2410_UCON); + + /* todo - proper fclk<>nonfclk switch. */ + + ucon &= ~S3C2440_UCON_CLKMASK; + + if (strcmp(clk->name, "uclk") == 0) + ucon |= S3C2440_UCON_UCLK; + else if (strcmp(clk->name, "pclk") == 0) + ucon |= S3C2440_UCON_PCLK; + else if (strcmp(clk->name, "fclk") == 0) + ucon |= S3C2440_UCON_FCLK; + else { + printk(KERN_ERR "unknown clock source %s\n", clk->name); + return -EINVAL; + } + + wr_regl(port, S3C2410_UCON, ucon); + return 0; +} + + +static int s3c2440_serial_getsource(struct uart_port *port, + struct s3c24xx_uart_clksrc *clk) +{ + unsigned long ucon = rd_regl(port, S3C2410_UCON); + unsigned long ucon0, ucon1, ucon2; + + switch (ucon & S3C2440_UCON_CLKMASK) { + case S3C2440_UCON_UCLK: + clk->divisor = 1; + clk->name = "uclk"; + break; + + case S3C2440_UCON_PCLK: + case S3C2440_UCON_PCLK2: + clk->divisor = 1; + clk->name = "pclk"; + break; + + case S3C2440_UCON_FCLK: + /* the fun of calculating the uart divisors on + * the s3c2440 */ + + ucon0 = __raw_readl(S3C24XX_VA_UART0 + S3C2410_UCON); + ucon1 = __raw_readl(S3C24XX_VA_UART1 + S3C2410_UCON); + ucon2 = __raw_readl(S3C24XX_VA_UART2 + S3C2410_UCON); + + printk("ucons: %08lx, %08lx, %08lx\n", ucon0, ucon1, ucon2); + + ucon0 &= S3C2440_UCON0_DIVMASK; + ucon1 &= S3C2440_UCON1_DIVMASK; + ucon2 &= S3C2440_UCON2_DIVMASK; + + if (ucon0 != 0) { + clk->divisor = ucon0 >> S3C2440_UCON_DIVSHIFT; + clk->divisor += 6; + } else if (ucon1 != 0) { + clk->divisor = ucon1 >> S3C2440_UCON_DIVSHIFT; + clk->divisor += 21; + } else if (ucon2 != 0) { + clk->divisor = ucon2 >> S3C2440_UCON_DIVSHIFT; + clk->divisor += 36; + } else { + /* manual calims 44, seems to be 9 */ + clk->divisor = 9; + } + + clk->name = "fclk"; + break; + } + + return 0; +} + +static int s3c2440_serial_resetport(struct uart_port *port, + struct s3c2410_uartcfg *cfg) +{ + unsigned long ucon = rd_regl(port, S3C2410_UCON); + + dbg("s3c2440_serial_resetport: port=%p (%08lx), cfg=%p\n", + port, port->mapbase, cfg); + + /* ensure we don't change the clock settings... */ + + ucon &= (S3C2440_UCON0_DIVMASK | (3<<10)); + + wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); + wr_regl(port, S3C2410_ULCON, cfg->ulcon); + + /* reset both fifos */ + + wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); + wr_regl(port, S3C2410_UFCON, cfg->ufcon); + + return 0; +} + +static struct s3c24xx_uart_info s3c2440_uart_inf = { + .name = "Samsung S3C2440 UART", + .type = PORT_S3C2440, + .fifosize = 64, + .rx_fifomask = S3C2440_UFSTAT_RXMASK, + .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, + .rx_fifofull = S3C2440_UFSTAT_RXFULL, + .tx_fifofull = S3C2440_UFSTAT_TXFULL, + .tx_fifomask = S3C2440_UFSTAT_TXMASK, + .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, + .get_clksrc = s3c2440_serial_getsource, + .set_clksrc = s3c2440_serial_setsource, + .reset_port = s3c2440_serial_resetport, +}; + +/* device management */ + +static int s3c2440_serial_probe(struct platform_device *dev) +{ + dbg("s3c2440_serial_probe: dev=%p\n", dev); + return s3c24xx_serial_probe(dev, &s3c2440_uart_inf); +} + +static struct platform_driver s3c2440_serial_drv = { + .probe = s3c2440_serial_probe, + .remove = s3c24xx_serial_remove, + .driver = { + .name = "s3c2440-uart", + .owner = THIS_MODULE, + }, +}; + +s3c24xx_console_init(&s3c2440_serial_drv, &s3c2440_uart_inf); + +static int __init s3c2440_serial_init(void) +{ + return s3c24xx_serial_init(&s3c2440_serial_drv, &s3c2440_uart_inf); +} + +static void __exit s3c2440_serial_exit(void) +{ + platform_driver_unregister(&s3c2440_serial_drv); +} + +module_init(s3c2440_serial_init); +module_exit(s3c2440_serial_exit); + +MODULE_DESCRIPTION("Samsung S3C2440,S3C2442 SoC Serial port driver"); +MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); +MODULE_LICENSE("GPLi v2"); +MODULE_ALIAS("platform:s3c2440-uart"); diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c new file mode 100644 index 000000000000..4a3ecaa629e6 --- /dev/null +++ b/drivers/serial/samsung.c @@ -0,0 +1,1317 @@ +/* linux/drivers/serial/samsuing.c + * + * Driver core for Samsung SoC onboard UARTs. + * + * Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +/* Hote on 2410 error handling + * + * The s3c2410 manual has a love/hate affair with the contents of the + * UERSTAT register in the UART blocks, and keeps marking some of the + * error bits as reserved. Having checked with the s3c2410x01, + * it copes with BREAKs properly, so I am happy to ignore the RESERVED + * feature from the latter versions of the manual. + * + * If it becomes aparrent that latter versions of the 2410 remove these + * bits, then action will have to be taken to differentiate the versions + * and change the policy on BREAK + * + * BJD, 04-Nov-2004 +*/ + +#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/sysrq.h> +#include <linux/console.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial_core.h> +#include <linux/serial.h> +#include <linux/delay.h> +#include <linux/clk.h> + +#include <asm/irq.h> + +#include <asm/hardware.h> + +#include <asm/plat-s3c/regs-serial.h> +#include <asm/arch/regs-gpio.h> + +#include "samsung.h" + +/* UART name and device definitions */ + +#define S3C24XX_SERIAL_NAME "ttySAC" +#define S3C24XX_SERIAL_MAJOR 204 +#define S3C24XX_SERIAL_MINOR 64 + +/* we can support 3 uarts, but not always use them */ + +#ifdef CONFIG_CPU_S3C2400 +#define NR_PORTS (2) +#else +#define NR_PORTS (3) +#endif + +/* port irq numbers */ + +#define TX_IRQ(port) ((port)->irq + 1) +#define RX_IRQ(port) ((port)->irq) + +/* macros to change one thing to another */ + +#define tx_enabled(port) ((port)->unused[0]) +#define rx_enabled(port) ((port)->unused[1]) + +/* flag to ignore all characters comming in */ +#define RXSTAT_DUMMY_READ (0x10000000) + +static inline struct s3c24xx_uart_port *to_ourport(struct uart_port *port) +{ + return container_of(port, struct s3c24xx_uart_port, port); +} + +/* translate a port to the device name */ + +static inline const char *s3c24xx_serial_portname(struct uart_port *port) +{ + return to_platform_device(port->dev)->name; +} + +static int s3c24xx_serial_txempty_nofifo(struct uart_port *port) +{ + return (rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE); +} + +static void s3c24xx_serial_rx_enable(struct uart_port *port) +{ + unsigned long flags; + unsigned int ucon, ufcon; + int count = 10000; + + spin_lock_irqsave(&port->lock, flags); + + while (--count && !s3c24xx_serial_txempty_nofifo(port)) + udelay(100); + + ufcon = rd_regl(port, S3C2410_UFCON); + ufcon |= S3C2410_UFCON_RESETRX; + wr_regl(port, S3C2410_UFCON, ufcon); + + ucon = rd_regl(port, S3C2410_UCON); + ucon |= S3C2410_UCON_RXIRQMODE; + wr_regl(port, S3C2410_UCON, ucon); + + rx_enabled(port) = 1; + spin_unlock_irqrestore(&port->lock, flags); +} + +static void s3c24xx_serial_rx_disable(struct uart_port *port) +{ + unsigned long flags; + unsigned int ucon; + + spin_lock_irqsave(&port->lock, flags); + + ucon = rd_regl(port, S3C2410_UCON); + ucon &= ~S3C2410_UCON_RXIRQMODE; + wr_regl(port, S3C2410_UCON, ucon); + + rx_enabled(port) = 0; + spin_unlock_irqrestore(&port->lock, flags); +} + +static void s3c24xx_serial_stop_tx(struct uart_port *port) +{ + if (tx_enabled(port)) { + disable_irq(TX_IRQ(port)); + tx_enabled(port) = 0; + if (port->flags & UPF_CONS_FLOW) + s3c24xx_serial_rx_enable(port); + } +} + +static void s3c24xx_serial_start_tx(struct uart_port *port) +{ + if (!tx_enabled(port)) { + if (port->flags & UPF_CONS_FLOW) + s3c24xx_serial_rx_disable(port); + + enable_irq(TX_IRQ(port)); + tx_enabled(port) = 1; + } +} + + +static void s3c24xx_serial_stop_rx(struct uart_port *port) +{ + if (rx_enabled(port)) { + dbg("s3c24xx_serial_stop_rx: port=%p\n", port); + disable_irq(RX_IRQ(port)); + rx_enabled(port) = 0; + } +} + +static void s3c24xx_serial_enable_ms(struct uart_port *port) +{ +} + +static inline struct s3c24xx_uart_info *s3c24xx_port_to_info(struct uart_port *port) +{ + return to_ourport(port)->info; +} + +static inline struct s3c2410_uartcfg *s3c24xx_port_to_cfg(struct uart_port *port) +{ + if (port->dev == NULL) + return NULL; + + return (struct s3c2410_uartcfg *)port->dev->platform_data; +} + +static int s3c24xx_serial_rx_fifocnt(struct s3c24xx_uart_port *ourport, + unsigned long ufstat) +{ + struct s3c24xx_uart_info *info = ourport->info; + + if (ufstat & info->rx_fifofull) + return info->fifosize; + + return (ufstat & info->rx_fifomask) >> info->rx_fifoshift; +} + + +/* ? - where has parity gone?? */ +#define S3C2410_UERSTAT_PARITY (0x1000) + +static irqreturn_t +s3c24xx_serial_rx_chars(int irq, void *dev_id) +{ + struct s3c24xx_uart_port *ourport = dev_id; + struct uart_port *port = &ourport->port; + struct tty_struct *tty = port->info->tty; + unsigned int ufcon, ch, flag, ufstat, uerstat; + int max_count = 64; + + while (max_count-- > 0) { + ufcon = rd_regl(port, S3C2410_UFCON); + ufstat = rd_regl(port, S3C2410_UFSTAT); + + if (s3c24xx_serial_rx_fifocnt(ourport, ufstat) == 0) + break; + + uerstat = rd_regl(port, S3C2410_UERSTAT); + ch = rd_regb(port, S3C2410_URXH); + + if (port->flags & UPF_CONS_FLOW) { + int txe = s3c24xx_serial_txempty_nofifo(port); + + if (rx_enabled(port)) { + if (!txe) { + rx_enabled(port) = 0; + continue; + } + } else { + if (txe) { + ufcon |= S3C2410_UFCON_RESETRX; + wr_regl(port, S3C2410_UFCON, ufcon); + rx_enabled(port) = 1; + goto out; + } + continue; + } + } + + /* insert the character into the buffer */ + + flag = TTY_NORMAL; + port->icount.rx++; + + if (unlikely(uerstat & S3C2410_UERSTAT_ANY)) { + dbg("rxerr: port ch=0x%02x, rxs=0x%08x\n", + ch, uerstat); + + /* check for break */ + if (uerstat & S3C2410_UERSTAT_BREAK) { + dbg("break!\n"); + port->icount.brk++; + if (uart_handle_break(port)) + goto ignore_char; + } + + if (uerstat & S3C2410_UERSTAT_FRAME) + port->icount.frame++; + if (uerstat & S3C2410_UERSTAT_OVERRUN) + port->icount.overrun++; + + uerstat &= port->read_status_mask; + + if (uerstat & S3C2410_UERSTAT_BREAK) + flag = TTY_BREAK; + else if (uerstat & S3C2410_UERSTAT_PARITY) + flag = TTY_PARITY; + else if (uerstat & (S3C2410_UERSTAT_FRAME | + S3C2410_UERSTAT_OVERRUN)) + flag = TTY_FRAME; + } + + if (uart_handle_sysrq_char(port, ch)) + goto ignore_char; + + uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN, + ch, flag); + + ignore_char: + continue; + } + tty_flip_buffer_push(tty); + + out: + return IRQ_HANDLED; +} + +static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id) +{ + struct s3c24xx_uart_port *ourport = id; + struct uart_port *port = &ourport->port; + struct circ_buf *xmit = &port->info->xmit; + int count = 256; + + if (port->x_char) { + wr_regb(port, S3C2410_UTXH, port->x_char); + port->icount.tx++; + port->x_char = 0; + goto out; + } + + /* if there isnt anything more to transmit, or the uart is now + * stopped, disable the uart and exit + */ + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { + s3c24xx_serial_stop_tx(port); + goto out; + } + + /* try and drain the buffer... */ + + while (!uart_circ_empty(xmit) && count-- > 0) { + if (rd_regl(port, S3C2410_UFSTAT) & ourport->info->tx_fifofull) + break; + + wr_regb(port, S3C2410_UTXH, xmit->buf[xmit->tail]); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + if (uart_circ_empty(xmit)) + s3c24xx_serial_stop_tx(port); + + out: + return IRQ_HANDLED; +} + +static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) +{ + struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); + unsigned long ufstat = rd_regl(port, S3C2410_UFSTAT); + unsigned long ufcon = rd_regl(port, S3C2410_UFCON); + + if (ufcon & S3C2410_UFCON_FIFOMODE) { + if ((ufstat & info->tx_fifomask) != 0 || + (ufstat & info->tx_fifofull)) + return 0; + + return 1; + } + + return s3c24xx_serial_txempty_nofifo(port); +} + +/* no modem control lines */ +static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port) +{ + unsigned int umstat = rd_regb(port, S3C2410_UMSTAT); + + if (umstat & S3C2410_UMSTAT_CTS) + return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; + else + return TIOCM_CAR | TIOCM_DSR; +} + +static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* todo - possibly remove AFC and do manual CTS */ +} + +static void s3c24xx_serial_break_ctl(struct uart_port *port, int break_state) +{ + unsigned long flags; + unsigned int ucon; + + spin_lock_irqsave(&port->lock, flags); + + ucon = rd_regl(port, S3C2410_UCON); + + if (break_state) + ucon |= S3C2410_UCON_SBREAK; + else + ucon &= ~S3C2410_UCON_SBREAK; + + wr_regl(port, S3C2410_UCON, ucon); + + spin_unlock_irqrestore(&port->lock, flags); +} + +static void s3c24xx_serial_shutdown(struct uart_port *port) +{ + struct s3c24xx_uart_port *ourport = to_ourport(port); + + if (ourport->tx_claimed) { + free_irq(TX_IRQ(port), ourport); + tx_enabled(port) = 0; + ourport->tx_claimed = 0; + } + + if (ourport->rx_claimed) { + free_irq(RX_IRQ(port), ourport); + ourport->rx_claimed = 0; + rx_enabled(port) = 0; + } +} + + +static int s3c24xx_serial_startup(struct uart_port *port) +{ + struct s3c24xx_uart_port *ourport = to_ourport(port); + int ret; + + dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n", + port->mapbase, port->membase); + + rx_enabled(port) = 1; + + ret = request_irq(RX_IRQ(port), + s3c24xx_serial_rx_chars, 0, + s3c24xx_serial_portname(port), ourport); + + if (ret != 0) { + printk(KERN_ERR "cannot get irq %d\n", RX_IRQ(port)); + return ret; + } + + ourport->rx_claimed = 1; + + dbg("requesting tx irq...\n"); + + tx_enabled(port) = 1; + + ret = request_irq(TX_IRQ(port), + s3c24xx_serial_tx_chars, 0, + s3c24xx_serial_portname(port), ourport); + + if (ret) { + printk(KERN_ERR "cannot get irq %d\n", TX_IRQ(port)); + goto err; + } + + ourport->tx_claimed = 1; + + dbg("s3c24xx_serial_startup ok\n"); + + /* the port reset code should have done the correct + * register setup for the port controls */ + + return ret; + + err: + s3c24xx_serial_shutdown(port); + return ret; +} + +/* power power management control */ + +static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, + unsigned int old) +{ + struct s3c24xx_uart_port *ourport = to_ourport(port); + + switch (level) { + case 3: + if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) + clk_disable(ourport->baudclk); + + clk_disable(ourport->clk); + break; + + case 0: + clk_enable(ourport->clk); + + if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) + clk_enable(ourport->baudclk); + + break; + default: + printk(KERN_ERR "s3c24xx_serial: unknown pm %d\n", level); + } +} + +/* baud rate calculation + * + * The UARTs on the S3C2410/S3C2440 can take their clocks from a number + * of different sources, including the peripheral clock ("pclk") and an + * external clock ("uclk"). The S3C2440 also adds the core clock ("fclk") + * with a programmable extra divisor. + * + * The following code goes through the clock sources, and calculates the + * baud clocks (and the resultant actual baud rates) and then tries to + * pick the closest one and select that. + * +*/ + + +#define MAX_CLKS (8) + +static struct s3c24xx_uart_clksrc tmp_clksrc = { + .name = "pclk", + .min_baud = 0, + .max_baud = 0, + .divisor = 1, +}; + +static inline int +s3c24xx_serial_getsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c) +{ + struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); + + return (info->get_clksrc)(port, c); +} + +static inline int +s3c24xx_serial_setsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c) +{ + struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); + + return (info->set_clksrc)(port, c); +} + +struct baud_calc { + struct s3c24xx_uart_clksrc *clksrc; + unsigned int calc; + unsigned int quot; + struct clk *src; +}; + +static int s3c24xx_serial_calcbaud(struct baud_calc *calc, + struct uart_port *port, + struct s3c24xx_uart_clksrc *clksrc, + unsigned int baud) +{ + unsigned long rate; + + calc->src = clk_get(port->dev, clksrc->name); + if (calc->src == NULL || IS_ERR(calc->src)) + return 0; + + rate = clk_get_rate(calc->src); + rate /= clksrc->divisor; + + calc->clksrc = clksrc; + calc->quot = (rate + (8 * baud)) / (16 * baud); + calc->calc = (rate / (calc->quot * 16)); + + calc->quot--; + return 1; +} + +static unsigned int s3c24xx_serial_getclk(struct uart_port *port, + struct s3c24xx_uart_clksrc **clksrc, + struct clk **clk, + unsigned int baud) +{ + struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port); + struct s3c24xx_uart_clksrc *clkp; + struct baud_calc res[MAX_CLKS]; + struct baud_calc *resptr, *best, *sptr; + int i; + + clkp = cfg->clocks; + best = NULL; + + if (cfg->clocks_size < 2) { + if (cfg->clocks_size == 0) + clkp = &tmp_clksrc; + + /* check to see if we're sourcing fclk, and if so we're + * going to have to update the clock source + */ + + if (strcmp(clkp->name, "fclk") == 0) { + struct s3c24xx_uart_clksrc src; + + s3c24xx_serial_getsource(port, &src); + + /* check that the port already using fclk, and if + * not, then re-select fclk + */ + + if (strcmp(src.name, clkp->name) == 0) { + s3c24xx_serial_setsource(port, clkp); + s3c24xx_serial_getsource(port, &src); + } + + clkp->divisor = src.divisor; + } + + s3c24xx_serial_calcbaud(res, port, clkp, baud); + best = res; + resptr = best + 1; + } else { + resptr = res; + + for (i = 0; i < cfg->clocks_size; i++, clkp++) { + if (s3c24xx_serial_calcbaud(resptr, port, clkp, baud)) + resptr++; + } + } + + /* ok, we now need to select the best clock we found */ + + if (!best) { + unsigned int deviation = (1<<30)|((1<<30)-1); + int calc_deviation; + + for (sptr = res; sptr < resptr; sptr++) { + calc_deviation = baud - sptr->calc; + if (calc_deviation < 0) + calc_deviation = -calc_deviation; + + if (calc_deviation < deviation) { + best = sptr; + deviation = calc_deviation; + } + } + } + + /* store results to pass back */ + + *clksrc = best->clksrc; + *clk = best->src; + + return best->quot; +} + +static void s3c24xx_serial_set_termios(struct uart_port *port, + struct ktermios *termios, + struct ktermios *old) +{ + struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port); + struct s3c24xx_uart_port *ourport = to_ourport(port); + struct s3c24xx_uart_clksrc *clksrc = NULL; + struct clk *clk = NULL; + unsigned long flags; + unsigned int baud, quot; + unsigned int ulcon; + unsigned int umcon; + + /* + * We don't support modem control lines. + */ + termios->c_cflag &= ~(HUPCL | CMSPAR); + termios->c_cflag |= CLOCAL; + + /* + * Ask the core to calculate the divisor for us. + */ + + baud = uart_get_baud_rate(port, termios, old, 0, 115200*8); + + if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST) + quot = port->custom_divisor; + else + quot = s3c24xx_serial_getclk(port, &clksrc, &clk, baud); + + /* check to see if we need to change clock source */ + + if (ourport->clksrc != clksrc || ourport->baudclk != clk) { + s3c24xx_serial_setsource(port, clksrc); + + if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) { + clk_disable(ourport->baudclk); + ourport->baudclk = NULL; + } + + clk_enable(clk); + + ourport->clksrc = clksrc; + ourport->baudclk = clk; + } + + switch (termios->c_cflag & CSIZE) { + case CS5: + dbg("config: 5bits/char\n"); + ulcon = S3C2410_LCON_CS5; + break; + case CS6: + dbg("config: 6bits/char\n"); + ulcon = S3C2410_LCON_CS6; + break; + case CS7: + dbg("config: 7bits/char\n"); + ulcon = S3C2410_LCON_CS7; + break; + case CS8: + default: + dbg("config: 8bits/char\n"); + ulcon = S3C2410_LCON_CS8; + break; + } + + /* preserve original lcon IR settings */ + ulcon |= (cfg->ulcon & S3C2410_LCON_IRM); + + if (termios->c_cflag & CSTOPB) + ulcon |= S3C2410_LCON_STOPB; + + umcon = (termios->c_cflag & CRTSCTS) ? S3C2410_UMCOM_AFC : 0; + + if (termios->c_cflag & PARENB) { + if (termios->c_cflag & PARODD) + ulcon |= S3C2410_LCON_PODD; + else + ulcon |= S3C2410_LCON_PEVEN; + } else { + ulcon |= S3C2410_LCON_PNONE; + } + + spin_lock_irqsave(&port->lock, flags); + + dbg("setting ulcon to %08x, brddiv to %d\n", ulcon, quot); + + wr_regl(port, S3C2410_ULCON, ulcon); + wr_regl(port, S3C2410_UBRDIV, quot); + wr_regl(port, S3C2410_UMCON, umcon); + + dbg("uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n", + rd_regl(port, S3C2410_ULCON), + rd_regl(port, S3C2410_UCON), + rd_regl(port, S3C2410_UFCON)); + + /* + * Update the per-port timeout. + */ + uart_update_timeout(port, termios->c_cflag, baud); + + /* + * Which character status flags are we interested in? + */ + port->read_status_mask = S3C2410_UERSTAT_OVERRUN; + if (termios->c_iflag & INPCK) + port->read_status_mask |= S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_PARITY; + + /* + * Which character status flags should we ignore? + */ + port->ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + port->ignore_status_mask |= S3C2410_UERSTAT_OVERRUN; + if (termios->c_iflag & IGNBRK && termios->c_iflag & IGNPAR) + port->ignore_status_mask |= S3C2410_UERSTAT_FRAME; + + /* + * Ignore all characters if CREAD is not set. + */ + if ((termios->c_cflag & CREAD) == 0) + port->ignore_status_mask |= RXSTAT_DUMMY_READ; + + spin_unlock_irqrestore(&port->lock, flags); +} + +static const char *s3c24xx_serial_type(struct uart_port *port) +{ + switch (port->type) { + case PORT_S3C2410: + return "S3C2410"; + case PORT_S3C2440: + return "S3C2440"; + case PORT_S3C2412: + return "S3C2412"; + default: + return NULL; + } +} + +#define MAP_SIZE (0x100) + +static void s3c24xx_serial_release_port(struct uart_port *port) +{ + release_mem_region(port->mapbase, MAP_SIZE); +} + +static int s3c24xx_serial_request_port(struct uart_port *port) +{ + const char *name = s3c24xx_serial_portname(port); + return request_mem_region(port->mapbase, MAP_SIZE, name) ? 0 : -EBUSY; +} + +static void s3c24xx_serial_config_port(struct uart_port *port, int flags) +{ + struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); + + if (flags & UART_CONFIG_TYPE && + s3c24xx_serial_request_port(port) == 0) + port->type = info->type; +} + +/* + * verify the new serial_struct (for TIOCSSERIAL). + */ +static int +s3c24xx_serial_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); + + if (ser->type != PORT_UNKNOWN && ser->type != info->type) + return -EINVAL; + + return 0; +} + + +#ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE + +static struct console s3c24xx_serial_console; + +#define S3C24XX_SERIAL_CONSOLE &s3c24xx_serial_console +#else +#define S3C24XX_SERIAL_CONSOLE NULL +#endif + +static struct uart_ops s3c24xx_serial_ops = { + .pm = s3c24xx_serial_pm, + .tx_empty = s3c24xx_serial_tx_empty, + .get_mctrl = s3c24xx_serial_get_mctrl, + .set_mctrl = s3c24xx_serial_set_mctrl, + .stop_tx = s3c24xx_serial_stop_tx, + .start_tx = s3c24xx_serial_start_tx, + .stop_rx = s3c24xx_serial_stop_rx, + .enable_ms = s3c24xx_serial_enable_ms, + .break_ctl = s3c24xx_serial_break_ctl, + .startup = s3c24xx_serial_startup, + .shutdown = s3c24xx_serial_shutdown, + .set_termios = s3c24xx_serial_set_termios, + .type = s3c24xx_serial_type, + .release_port = s3c24xx_serial_release_port, + .request_port = s3c24xx_serial_request_port, + .config_port = s3c24xx_serial_config_port, + .verify_port = s3c24xx_serial_verify_port, +}; + + +static struct uart_driver s3c24xx_uart_drv = { + .owner = THIS_MODULE, + .dev_name = "s3c2410_serial", + .nr = 3, + .cons = S3C24XX_SERIAL_CONSOLE, + .driver_name = S3C24XX_SERIAL_NAME, + .major = S3C24XX_SERIAL_MAJOR, + .minor = S3C24XX_SERIAL_MINOR, +}; + +static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = { + [0] = { + .port = { + .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock), + .iotype = UPIO_MEM, + .irq = IRQ_S3CUART_RX0, + .uartclk = 0, + .fifosize = 16, + .ops = &s3c24xx_serial_ops, + .flags = UPF_BOOT_AUTOCONF, + .line = 0, + } + }, + [1] = { + .port = { + .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[1].port.lock), + .iotype = UPIO_MEM, + .irq = IRQ_S3CUART_RX1, + .uartclk = 0, + .fifosize = 16, + .ops = &s3c24xx_serial_ops, + .flags = UPF_BOOT_AUTOCONF, + .line = 1, + } + }, +#if NR_PORTS > 2 + + [2] = { + .port = { + .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[2].port.lock), + .iotype = UPIO_MEM, + .irq = IRQ_S3CUART_RX2, + .uartclk = 0, + .fifosize = 16, + .ops = &s3c24xx_serial_ops, + .flags = UPF_BOOT_AUTOCONF, + .line = 2, + } + } +#endif +}; + +/* s3c24xx_serial_resetport + * + * wrapper to call the specific reset for this port (reset the fifos + * and the settings) +*/ + +static inline int s3c24xx_serial_resetport(struct uart_port *port, + struct s3c2410_uartcfg *cfg) +{ + struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); + + return (info->reset_port)(port, cfg); +} + +/* s3c24xx_serial_init_port + * + * initialise a single serial port from the platform device given + */ + +static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, + struct s3c24xx_uart_info *info, + struct platform_device *platdev) +{ + struct uart_port *port = &ourport->port; + struct s3c2410_uartcfg *cfg; + struct resource *res; + int ret; + + dbg("s3c24xx_serial_init_port: port=%p, platdev=%p\n", port, platdev); + + if (platdev == NULL) + return -ENODEV; + + cfg = s3c24xx_dev_to_cfg(&platdev->dev); + + if (port->mapbase != 0) + return 0; + + if (cfg->hwport > 3) + return -EINVAL; + + /* setup info for port */ + port->dev = &platdev->dev; + ourport->info = info; + + /* copy the info in from provided structure */ + ourport->port.fifosize = info->fifosize; + + dbg("s3c24xx_serial_init_port: %p (hw %d)...\n", port, cfg->hwport); + + port->uartclk = 1; + + if (cfg->uart_flags & UPF_CONS_FLOW) { + dbg("s3c24xx_serial_init_port: enabling flow control\n"); + port->flags |= UPF_CONS_FLOW; + } + + /* sort our the physical and virtual addresses for each UART */ + + res = platform_get_resource(platdev, IORESOURCE_MEM, 0); + if (res == NULL) { + printk(KERN_ERR "failed to find memory resource for uart\n"); + return -EINVAL; + } + + dbg("resource %p (%lx..%lx)\n", res, res->start, res->end); + + port->mapbase = res->start; + port->membase = S3C24XX_VA_UART + (res->start - S3C24XX_PA_UART); + ret = platform_get_irq(platdev, 0); + if (ret < 0) + port->irq = 0; + else + port->irq = ret; + + ourport->clk = clk_get(&platdev->dev, "uart"); + + dbg("port: map=%08x, mem=%08x, irq=%d, clock=%ld\n", + port->mapbase, port->membase, port->irq, port->uartclk); + + /* reset the fifos (and setup the uart) */ + s3c24xx_serial_resetport(port, cfg); + return 0; +} + +static ssize_t s3c24xx_serial_show_clksrc(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct uart_port *port = s3c24xx_dev_to_port(dev); + struct s3c24xx_uart_port *ourport = to_ourport(port); + + return snprintf(buf, PAGE_SIZE, "* %s\n", ourport->clksrc->name); +} + +static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL); + +/* Device driver serial port probe */ + +static int probe_index; + +int s3c24xx_serial_probe(struct platform_device *dev, + struct s3c24xx_uart_info *info) +{ + struct s3c24xx_uart_port *ourport; + int ret; + + dbg("s3c24xx_serial_probe(%p, %p) %d\n", dev, info, probe_index); + + ourport = &s3c24xx_serial_ports[probe_index]; + probe_index++; + + dbg("%s: initialising port %p...\n", __func__, ourport); + + ret = s3c24xx_serial_init_port(ourport, info, dev); + if (ret < 0) + goto probe_err; + + dbg("%s: adding port\n", __func__); + uart_add_one_port(&s3c24xx_uart_drv, &ourport->port); + platform_set_drvdata(dev, &ourport->port); + + ret = device_create_file(&dev->dev, &dev_attr_clock_source); + if (ret < 0) + printk(KERN_ERR "%s: failed to add clksrc attr.\n", __func__); + + return 0; + + probe_err: + return ret; +} + +EXPORT_SYMBOL_GPL(s3c24xx_serial_probe); + +int s3c24xx_serial_remove(struct platform_device *dev) +{ + struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); + + if (port) { + device_remove_file(&dev->dev, &dev_attr_clock_source); + uart_remove_one_port(&s3c24xx_uart_drv, port); + } + + return 0; +} + +EXPORT_SYMBOL_GPL(s3c24xx_serial_remove); + +/* UART power management code */ + +#ifdef CONFIG_PM + +static int s3c24xx_serial_suspend(struct platform_device *dev, pm_message_t state) +{ + struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); + + if (port) + uart_suspend_port(&s3c24xx_uart_drv, port); + + return 0; +} + +static int s3c24xx_serial_resume(struct platform_device *dev) +{ + struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); + struct s3c24xx_uart_port *ourport = to_ourport(port); + + if (port) { + clk_enable(ourport->clk); + s3c24xx_serial_resetport(port, s3c24xx_port_to_cfg(port)); + clk_disable(ourport->clk); + + uart_resume_port(&s3c24xx_uart_drv, port); + } + + return 0; +} +#endif + +int s3c24xx_serial_init(struct platform_driver *drv, + struct s3c24xx_uart_info *info) +{ + dbg("s3c24xx_serial_init(%p,%p)\n", drv, info); + +#ifdef CONFIG_PM + drv->suspend = s3c24xx_serial_suspend; + drv->resume = s3c24xx_serial_resume; +#endif + + return platform_driver_register(drv); +} + +EXPORT_SYMBOL_GPL(s3c24xx_serial_init); + +/* module initialisation code */ + +static int __init s3c24xx_serial_modinit(void) +{ + int ret; + + ret = uart_register_driver(&s3c24xx_uart_drv); + if (ret < 0) { + printk(KERN_ERR "failed to register UART driver\n"); + return -1; + } + + return 0; +} + +static void __exit s3c24xx_serial_modexit(void) +{ + uart_unregister_driver(&s3c24xx_uart_drv); +} + +module_init(s3c24xx_serial_modinit); +module_exit(s3c24xx_serial_modexit); + +/* Console code */ + +#ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE + +static struct uart_port *cons_uart; + +static int +s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon) +{ + struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); + unsigned long ufstat, utrstat; + + if (ufcon & S3C2410_UFCON_FIFOMODE) { + /* fifo mode - check ammount of data in fifo registers... */ + + ufstat = rd_regl(port, S3C2410_UFSTAT); + return (ufstat & info->tx_fifofull) ? 0 : 1; + } + + /* in non-fifo mode, we go and use the tx buffer empty */ + + utrstat = rd_regl(port, S3C2410_UTRSTAT); + return (utrstat & S3C2410_UTRSTAT_TXE) ? 1 : 0; +} + +static void +s3c24xx_serial_console_putchar(struct uart_port *port, int ch) +{ + unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON); + while (!s3c24xx_serial_console_txrdy(port, ufcon)) + barrier(); + wr_regb(cons_uart, S3C2410_UTXH, ch); +} + +static void +s3c24xx_serial_console_write(struct console *co, const char *s, + unsigned int count) +{ + uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar); +} + +static void __init +s3c24xx_serial_get_options(struct uart_port *port, int *baud, + int *parity, int *bits) +{ + struct s3c24xx_uart_clksrc clksrc; + struct clk *clk; + unsigned int ulcon; + unsigned int ucon; + unsigned int ubrdiv; + unsigned long rate; + + ulcon = rd_regl(port, S3C2410_ULCON); + ucon = rd_regl(port, S3C2410_UCON); + ubrdiv = rd_regl(port, S3C2410_UBRDIV); + + dbg("s3c24xx_serial_get_options: port=%p\n" + "registers: ulcon=%08x, ucon=%08x, ubdriv=%08x\n", + port, ulcon, ucon, ubrdiv); + + if ((ucon & 0xf) != 0) { + /* consider the serial port configured if the tx/rx mode set */ + + switch (ulcon & S3C2410_LCON_CSMASK) { + case S3C2410_LCON_CS5: + *bits = 5; + break; + case S3C2410_LCON_CS6: + *bits = 6; + break; + case S3C2410_LCON_CS7: + *bits = 7; + break; + default: + case S3C2410_LCON_CS8: + *bits = 8; + break; + } + + switch (ulcon & S3C2410_LCON_PMASK) { + case S3C2410_LCON_PEVEN: + *parity = 'e'; + break; + + case S3C2410_LCON_PODD: + *parity = 'o'; + break; + + case S3C2410_LCON_PNONE: + default: + *parity = 'n'; + } + + /* now calculate the baud rate */ + + s3c24xx_serial_getsource(port, &clksrc); + + clk = clk_get(port->dev, clksrc.name); + if (!IS_ERR(clk) && clk != NULL) + rate = clk_get_rate(clk) / clksrc.divisor; + else + rate = 1; + + + *baud = rate / (16 * (ubrdiv + 1)); + dbg("calculated baud %d\n", *baud); + } + +} + +/* s3c24xx_serial_init_ports + * + * initialise the serial ports from the machine provided initialisation + * data. +*/ + +static int s3c24xx_serial_init_ports(struct s3c24xx_uart_info *info) +{ + struct s3c24xx_uart_port *ptr = s3c24xx_serial_ports; + struct platform_device **platdev_ptr; + int i; + + dbg("s3c24xx_serial_init_ports: initialising ports...\n"); + + platdev_ptr = s3c24xx_uart_devs; + + for (i = 0; i < NR_PORTS; i++, ptr++, platdev_ptr++) { + s3c24xx_serial_init_port(ptr, info, *platdev_ptr); + } + + return 0; +} + +static int __init +s3c24xx_serial_console_setup(struct console *co, char *options) +{ + struct uart_port *port; + int baud = 9600; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + + dbg("s3c24xx_serial_console_setup: co=%p (%d), %s\n", + co, co->index, options); + + /* is this a valid port */ + + if (co->index == -1 || co->index >= NR_PORTS) + co->index = 0; + + port = &s3c24xx_serial_ports[co->index].port; + + /* is the port configured? */ + + if (port->mapbase == 0x0) { + co->index = 0; + port = &s3c24xx_serial_ports[co->index].port; + } + + cons_uart = port; + + dbg("s3c24xx_serial_console_setup: port=%p (%d)\n", port, co->index); + + /* + * Check whether an invalid uart number has been specified, and + * if so, search for the first available port that does have + * console support. + */ + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + else + s3c24xx_serial_get_options(port, &baud, &parity, &bits); + + dbg("s3c24xx_serial_console_setup: baud %d\n", baud); + + return uart_set_options(port, co, baud, parity, bits, flow); +} + +/* s3c24xx_serial_initconsole + * + * initialise the console from one of the uart drivers +*/ + +static struct console s3c24xx_serial_console = { + .name = S3C24XX_SERIAL_NAME, + .device = uart_console_device, + .flags = CON_PRINTBUFFER, + .index = -1, + .write = s3c24xx_serial_console_write, + .setup = s3c24xx_serial_console_setup +}; + +int s3c24xx_serial_initconsole(struct platform_driver *drv, + struct s3c24xx_uart_info *info) + +{ + struct platform_device *dev = s3c24xx_uart_devs[0]; + + dbg("s3c24xx_serial_initconsole\n"); + + /* select driver based on the cpu */ + + if (dev == NULL) { + printk(KERN_ERR "s3c24xx: no devices for console init\n"); + return 0; + } + + if (strcmp(dev->name, drv->driver.name) != 0) + return 0; + + s3c24xx_serial_console.data = &s3c24xx_uart_drv; + s3c24xx_serial_init_ports(info); + + register_console(&s3c24xx_serial_console); + return 0; +} + +#endif /* CONFIG_SERIAL_SAMSUNG_CONSOLE */ + +MODULE_DESCRIPTION("Samsung SoC Serial port driver"); +MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/serial/samsung.h b/drivers/serial/samsung.h new file mode 100644 index 000000000000..5c92ebbe7d9e --- /dev/null +++ b/drivers/serial/samsung.h @@ -0,0 +1,102 @@ +/* linux/drivers/serial/samsung.h + * + * Driver for Samsung SoC onboard UARTs. + * + * Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +struct s3c24xx_uart_info { + char *name; + unsigned int type; + unsigned int fifosize; + unsigned long rx_fifomask; + unsigned long rx_fifoshift; + unsigned long rx_fifofull; + unsigned long tx_fifomask; + unsigned long tx_fifoshift; + unsigned long tx_fifofull; + + /* clock source control */ + + int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk); + int (*set_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk); + + /* uart controls */ + int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *); +}; + +struct s3c24xx_uart_port { + unsigned char rx_claimed; + unsigned char tx_claimed; + + struct s3c24xx_uart_info *info; + struct s3c24xx_uart_clksrc *clksrc; + struct clk *clk; + struct clk *baudclk; + struct uart_port port; +}; + +/* conversion functions */ + +#define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev) +#define s3c24xx_dev_to_cfg(__dev) (struct s3c2410_uartcfg *)((__dev)->platform_data) + +/* register access controls */ + +#define portaddr(port, reg) ((port)->membase + (reg)) + +#define rd_regb(port, reg) (__raw_readb(portaddr(port, reg))) +#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg))) + +#define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg)) +#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg)) + +extern int s3c24xx_serial_probe(struct platform_device *dev, + struct s3c24xx_uart_info *uart); + +extern int s3c24xx_serial_remove(struct platform_device *dev); + +extern int s3c24xx_serial_initconsole(struct platform_driver *drv, + struct s3c24xx_uart_info *uart); + +extern int s3c24xx_serial_init(struct platform_driver *drv, + struct s3c24xx_uart_info *info); + +#ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE + +#define s3c24xx_console_init(__drv, __inf) \ +static int __init s3c_serial_console_init(void) \ +{ \ + return s3c24xx_serial_initconsole(__drv, __inf); \ +} \ + \ +console_initcall(s3c_serial_console_init) + +#else +#define s3c24xx_console_init(drv, inf) extern void no_console(void) +#endif + +#ifdef CONFIG_SERIAL_SAMSUNG_DEBUG + +extern void printascii(const char *); + +static void dbg(const char *fmt, ...) +{ + va_list va; + char buff[256]; + + va_start(va, fmt); + vsprintf(buff, fmt, va); + va_end(va); + + printascii(buff); +} + +#else +#define dbg(x...) do { } while (0) +#endif |