diff options
Diffstat (limited to 'drivers/serial')
26 files changed, 1580 insertions, 239 deletions
diff --git a/drivers/serial/68328serial.c b/drivers/serial/68328serial.c index 78ed24bb6a35..30463862603b 100644 --- a/drivers/serial/68328serial.c +++ b/drivers/serial/68328serial.c @@ -1437,7 +1437,7 @@ int m68328_console_setup(struct console *cp, char *arg) for (i = 0; i < ARRAY_SIZE(baud_table); i++) if (baud_table[i] == n) break; - if (i < BAUD_TABLE_SIZE) { + if (i < ARRAY_SIZE(baud_table)) { m68328_console_baud = n; m68328_console_cbaud = 0; if (i > 15) { diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 2b1ea3d4c4f4..891e1dd65f24 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -1891,8 +1891,8 @@ static int serial8250_get_poll_char(struct uart_port *port) struct uart_8250_port *up = (struct uart_8250_port *)port; unsigned char lsr = serial_inp(up, UART_LSR); - while (!(lsr & UART_LSR_DR)) - lsr = serial_inp(up, UART_LSR); + if (!(lsr & UART_LSR_DR)) + return NO_POLL_CHAR; return serial_inp(up, UART_RX); } diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 302836a80693..8b23165bc5dc 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -1423,8 +1423,8 @@ config SERIAL_SC26XX_CONSOLE Support for Console on SC2681/SC2692 serial ports. config SERIAL_BFIN_SPORT - tristate "Blackfin SPORT emulate UART (EXPERIMENTAL)" - depends on BLACKFIN && EXPERIMENTAL + tristate "Blackfin SPORT emulate UART" + depends on BLACKFIN select SERIAL_CORE help Enable SPORT emulate UART on Blackfin series. @@ -1439,28 +1439,52 @@ config SERIAL_BFIN_SPORT_CONSOLE config SERIAL_BFIN_SPORT0_UART bool "Enable UART over SPORT0" - depends on SERIAL_BFIN_SPORT && !(BF542 || BF542M || BF544 || BF544M) + depends on SERIAL_BFIN_SPORT && !(BF542 || BF544) help Enable UART over SPORT0 +config SERIAL_BFIN_SPORT0_UART_CTSRTS + bool "Enable UART over SPORT0 hardware flow control" + depends on SERIAL_BFIN_SPORT0_UART + help + Enable hardware flow control in the driver. + config SERIAL_BFIN_SPORT1_UART bool "Enable UART over SPORT1" depends on SERIAL_BFIN_SPORT help Enable UART over SPORT1 +config SERIAL_BFIN_SPORT1_UART_CTSRTS + bool "Enable UART over SPORT1 hardware flow control" + depends on SERIAL_BFIN_SPORT1_UART + help + Enable hardware flow control in the driver. + config SERIAL_BFIN_SPORT2_UART bool "Enable UART over SPORT2" depends on SERIAL_BFIN_SPORT && (BF54x || BF538 || BF539) help Enable UART over SPORT2 +config SERIAL_BFIN_SPORT2_UART_CTSRTS + bool "Enable UART over SPORT2 hardware flow control" + depends on SERIAL_BFIN_SPORT2_UART + help + Enable hardware flow control in the driver. + config SERIAL_BFIN_SPORT3_UART bool "Enable UART over SPORT3" depends on SERIAL_BFIN_SPORT && (BF54x || BF538 || BF539) help Enable UART over SPORT3 +config SERIAL_BFIN_SPORT3_UART_CTSRTS + bool "Enable UART over SPORT3 hardware flow control" + depends on SERIAL_BFIN_SPORT3_UART + help + Enable hardware flow control in the driver. + config SERIAL_TIMBERDALE tristate "Support for timberdale UART" select SERIAL_CORE @@ -1499,4 +1523,56 @@ config SERIAL_GRLIB_GAISLER_APBUART_CONSOLE help Support for running a console on the GRLIB APBUART +config SERIAL_ALTERA_JTAGUART + tristate "Altera JTAG UART support" + select SERIAL_CORE + help + This driver supports the Altera JTAG UART port. + +config SERIAL_ALTERA_JTAGUART_CONSOLE + bool "Altera JTAG UART console support" + depends on SERIAL_ALTERA_JTAGUART=y + select SERIAL_CORE_CONSOLE + help + Enable a Altera JTAG UART port to be the system console. + +config SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS + bool "Bypass output when no connection" + depends on SERIAL_ALTERA_JTAGUART_CONSOLE + select SERIAL_CORE_CONSOLE + help + Bypass console output and keep going even if there is no + JTAG terminal connection with the host. + +config SERIAL_ALTERA_UART + tristate "Altera UART support" + select SERIAL_CORE + help + This driver supports the Altera softcore UART port. + +config SERIAL_ALTERA_UART_MAXPORTS + int "Maximum number of Altera UART ports" + depends on SERIAL_ALTERA_UART + default 4 + help + This setting lets you define the maximum number of the Altera + UART ports. The usual default varies from board to board, and + this setting is a way of catering for that. + +config SERIAL_ALTERA_UART_BAUDRATE + int "Default baudrate for Altera UART ports" + depends on SERIAL_ALTERA_UART + default 115200 + help + This setting lets you define what the default baudrate is for the + Altera UART ports. The usual default varies from board to board, + and this setting is a way of catering for that. + +config SERIAL_ALTERA_UART_CONSOLE + bool "Altera UART console support" + depends on SERIAL_ALTERA_UART=y + select SERIAL_CORE_CONSOLE + help + Enable a Altera UART port to be the system console. + endmenu diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 328f107346c4..208a85572c32 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -82,3 +82,5 @@ obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o obj-$(CONFIG_SERIAL_QE) += ucc_uart.o obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o +obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o +obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o diff --git a/drivers/serial/altera_jtaguart.c b/drivers/serial/altera_jtaguart.c new file mode 100644 index 000000000000..f9b49b5ff5e1 --- /dev/null +++ b/drivers/serial/altera_jtaguart.c @@ -0,0 +1,504 @@ +/* + * altera_jtaguart.c -- Altera JTAG UART driver + * + * Based on mcf.c -- Freescale ColdFire UART driver + * + * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com> + * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw> + * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch> + * + * 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 + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/console.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/altera_jtaguart.h> + +#define DRV_NAME "altera_jtaguart" + +/* + * Altera JTAG UART register definitions according to the Altera JTAG UART + * datasheet: http://www.altera.com/literature/hb/nios2/n2cpu_nii51009.pdf + */ + +#define ALTERA_JTAGUART_SIZE 8 + +#define ALTERA_JTAGUART_DATA_REG 0 + +#define ALTERA_JTAGUART_DATA_DATA_MSK 0x000000FF +#define ALTERA_JTAGUART_DATA_RVALID_MSK 0x00008000 +#define ALTERA_JTAGUART_DATA_RAVAIL_MSK 0xFFFF0000 +#define ALTERA_JTAGUART_DATA_RAVAIL_OFF 16 + +#define ALTERA_JTAGUART_CONTROL_REG 4 + +#define ALTERA_JTAGUART_CONTROL_RE_MSK 0x00000001 +#define ALTERA_JTAGUART_CONTROL_WE_MSK 0x00000002 +#define ALTERA_JTAGUART_CONTROL_RI_MSK 0x00000100 +#define ALTERA_JTAGUART_CONTROL_RI_OFF 8 +#define ALTERA_JTAGUART_CONTROL_WI_MSK 0x00000200 +#define ALTERA_JTAGUART_CONTROL_AC_MSK 0x00000400 +#define ALTERA_JTAGUART_CONTROL_WSPACE_MSK 0xFFFF0000 +#define ALTERA_JTAGUART_CONTROL_WSPACE_OFF 16 + +/* + * Local per-uart structure. + */ +struct altera_jtaguart { + struct uart_port port; + unsigned int sigs; /* Local copy of line sigs */ + unsigned long imr; /* Local IMR mirror */ +}; + +static unsigned int altera_jtaguart_tx_empty(struct uart_port *port) +{ + return (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & + ALTERA_JTAGUART_CONTROL_WSPACE_MSK) ? TIOCSER_TEMT : 0; +} + +static unsigned int altera_jtaguart_get_mctrl(struct uart_port *port) +{ + return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; +} + +static void altera_jtaguart_set_mctrl(struct uart_port *port, unsigned int sigs) +{ +} + +static void altera_jtaguart_start_tx(struct uart_port *port) +{ + struct altera_jtaguart *pp = + container_of(port, struct altera_jtaguart, port); + + pp->imr |= ALTERA_JTAGUART_CONTROL_WE_MSK; + writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); +} + +static void altera_jtaguart_stop_tx(struct uart_port *port) +{ + struct altera_jtaguart *pp = + container_of(port, struct altera_jtaguart, port); + + pp->imr &= ~ALTERA_JTAGUART_CONTROL_WE_MSK; + writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); +} + +static void altera_jtaguart_stop_rx(struct uart_port *port) +{ + struct altera_jtaguart *pp = + container_of(port, struct altera_jtaguart, port); + + pp->imr &= ~ALTERA_JTAGUART_CONTROL_RE_MSK; + writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); +} + +static void altera_jtaguart_break_ctl(struct uart_port *port, int break_state) +{ +} + +static void altera_jtaguart_enable_ms(struct uart_port *port) +{ +} + +static void altera_jtaguart_set_termios(struct uart_port *port, + struct ktermios *termios, + struct ktermios *old) +{ + /* Just copy the old termios settings back */ + if (old) + tty_termios_copy_hw(termios, old); +} + +static void altera_jtaguart_rx_chars(struct altera_jtaguart *pp) +{ + struct uart_port *port = &pp->port; + unsigned char ch, flag; + unsigned long status; + + while ((status = readl(port->membase + ALTERA_JTAGUART_DATA_REG)) & + ALTERA_JTAGUART_DATA_RVALID_MSK) { + ch = status & ALTERA_JTAGUART_DATA_DATA_MSK; + flag = TTY_NORMAL; + port->icount.rx++; + + if (uart_handle_sysrq_char(port, ch)) + continue; + uart_insert_char(port, 0, 0, ch, flag); + } + + tty_flip_buffer_push(port->state->port.tty); +} + +static void altera_jtaguart_tx_chars(struct altera_jtaguart *pp) +{ + struct uart_port *port = &pp->port; + struct circ_buf *xmit = &port->state->xmit; + unsigned int pending, count; + + if (port->x_char) { + /* Send special char - probably flow control */ + writel(port->x_char, port->membase + ALTERA_JTAGUART_DATA_REG); + port->x_char = 0; + port->icount.tx++; + return; + } + + pending = uart_circ_chars_pending(xmit); + if (pending > 0) { + count = (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & + ALTERA_JTAGUART_CONTROL_WSPACE_MSK) >> + ALTERA_JTAGUART_CONTROL_WSPACE_OFF; + if (count > pending) + count = pending; + if (count > 0) { + pending -= count; + while (count--) { + writel(xmit->buf[xmit->tail], + port->membase + ALTERA_JTAGUART_DATA_REG); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + } + if (pending < WAKEUP_CHARS) + uart_write_wakeup(port); + } + } + + if (pending == 0) { + pp->imr &= ~ALTERA_JTAGUART_CONTROL_WE_MSK; + writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); + } +} + +static irqreturn_t altera_jtaguart_interrupt(int irq, void *data) +{ + struct uart_port *port = data; + struct altera_jtaguart *pp = + container_of(port, struct altera_jtaguart, port); + unsigned int isr; + + isr = (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) >> + ALTERA_JTAGUART_CONTROL_RI_OFF) & pp->imr; + + spin_lock(&port->lock); + + if (isr & ALTERA_JTAGUART_CONTROL_RE_MSK) + altera_jtaguart_rx_chars(pp); + if (isr & ALTERA_JTAGUART_CONTROL_WE_MSK) + altera_jtaguart_tx_chars(pp); + + spin_unlock(&port->lock); + + return IRQ_RETVAL(isr); +} + +static void altera_jtaguart_config_port(struct uart_port *port, int flags) +{ + port->type = PORT_ALTERA_JTAGUART; + + /* Clear mask, so no surprise interrupts. */ + writel(0, port->membase + ALTERA_JTAGUART_CONTROL_REG); +} + +static int altera_jtaguart_startup(struct uart_port *port) +{ + struct altera_jtaguart *pp = + container_of(port, struct altera_jtaguart, port); + unsigned long flags; + int ret; + + ret = request_irq(port->irq, altera_jtaguart_interrupt, IRQF_DISABLED, + DRV_NAME, port); + if (ret) { + pr_err(DRV_NAME ": unable to attach Altera JTAG UART %d " + "interrupt vector=%d\n", port->line, port->irq); + return ret; + } + + spin_lock_irqsave(&port->lock, flags); + + /* Enable RX interrupts now */ + pp->imr = ALTERA_JTAGUART_CONTROL_RE_MSK; + writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); + + spin_unlock_irqrestore(&port->lock, flags); + + return 0; +} + +static void altera_jtaguart_shutdown(struct uart_port *port) +{ + struct altera_jtaguart *pp = + container_of(port, struct altera_jtaguart, port); + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + + /* Disable all interrupts now */ + pp->imr = 0; + writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); + + spin_unlock_irqrestore(&port->lock, flags); + + free_irq(port->irq, port); +} + +static const char *altera_jtaguart_type(struct uart_port *port) +{ + return (port->type == PORT_ALTERA_JTAGUART) ? "Altera JTAG UART" : NULL; +} + +static int altera_jtaguart_request_port(struct uart_port *port) +{ + /* UARTs always present */ + return 0; +} + +static void altera_jtaguart_release_port(struct uart_port *port) +{ + /* Nothing to release... */ +} + +static int altera_jtaguart_verify_port(struct uart_port *port, + struct serial_struct *ser) +{ + if (ser->type != PORT_UNKNOWN && ser->type != PORT_ALTERA_JTAGUART) + return -EINVAL; + return 0; +} + +/* + * Define the basic serial functions we support. + */ +static struct uart_ops altera_jtaguart_ops = { + .tx_empty = altera_jtaguart_tx_empty, + .get_mctrl = altera_jtaguart_get_mctrl, + .set_mctrl = altera_jtaguart_set_mctrl, + .start_tx = altera_jtaguart_start_tx, + .stop_tx = altera_jtaguart_stop_tx, + .stop_rx = altera_jtaguart_stop_rx, + .enable_ms = altera_jtaguart_enable_ms, + .break_ctl = altera_jtaguart_break_ctl, + .startup = altera_jtaguart_startup, + .shutdown = altera_jtaguart_shutdown, + .set_termios = altera_jtaguart_set_termios, + .type = altera_jtaguart_type, + .request_port = altera_jtaguart_request_port, + .release_port = altera_jtaguart_release_port, + .config_port = altera_jtaguart_config_port, + .verify_port = altera_jtaguart_verify_port, +}; + +#define ALTERA_JTAGUART_MAXPORTS 1 +static struct altera_jtaguart altera_jtaguart_ports[ALTERA_JTAGUART_MAXPORTS]; + +#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) + +int __init early_altera_jtaguart_setup(struct altera_jtaguart_platform_uart + *platp) +{ + struct uart_port *port; + int i; + + for (i = 0; i < ALTERA_JTAGUART_MAXPORTS && platp[i].mapbase; i++) { + port = &altera_jtaguart_ports[i].port; + + port->line = i; + port->type = PORT_ALTERA_JTAGUART; + port->mapbase = platp[i].mapbase; + port->membase = ioremap(port->mapbase, ALTERA_JTAGUART_SIZE); + port->iotype = SERIAL_IO_MEM; + port->irq = platp[i].irq; + port->flags = ASYNC_BOOT_AUTOCONF; + port->ops = &altera_jtaguart_ops; + } + + return 0; +} + +#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS) +static void altera_jtaguart_console_putc(struct console *co, const char c) +{ + struct uart_port *port = &(altera_jtaguart_ports + co->index)->port; + unsigned long status; + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + while (((status = readl(port->membase + ALTERA_JTAGUART_CONTROL_REG)) & + ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) { + if ((status & ALTERA_JTAGUART_CONTROL_AC_MSK) == 0) { + spin_unlock_irqrestore(&port->lock, flags); + return; /* no connection activity */ + } + spin_unlock_irqrestore(&port->lock, flags); + cpu_relax(); + spin_lock_irqsave(&port->lock, flags); + } + writel(c, port->membase + ALTERA_JTAGUART_DATA_REG); + spin_unlock_irqrestore(&port->lock, flags); +} +#else +static void altera_jtaguart_console_putc(struct console *co, const char c) +{ + struct uart_port *port = &(altera_jtaguart_ports + co->index)->port; + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + while ((readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & + ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) { + spin_unlock_irqrestore(&port->lock, flags); + cpu_relax(); + spin_lock_irqsave(&port->lock, flags); + } + writel(c, port->membase + ALTERA_JTAGUART_DATA_REG); + spin_unlock_irqrestore(&port->lock, flags); +} +#endif + +static void altera_jtaguart_console_write(struct console *co, const char *s, + unsigned int count) +{ + for (; count; count--, s++) { + altera_jtaguart_console_putc(co, *s); + if (*s == '\n') + altera_jtaguart_console_putc(co, '\r'); + } +} + +static int __init altera_jtaguart_console_setup(struct console *co, + char *options) +{ + struct uart_port *port; + + if (co->index < 0 || co->index >= ALTERA_JTAGUART_MAXPORTS) + return -EINVAL; + port = &altera_jtaguart_ports[co->index].port; + if (port->membase == 0) + return -ENODEV; + return 0; +} + +static struct uart_driver altera_jtaguart_driver; + +static struct console altera_jtaguart_console = { + .name = "ttyJ", + .write = altera_jtaguart_console_write, + .device = uart_console_device, + .setup = altera_jtaguart_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &altera_jtaguart_driver, +}; + +static int __init altera_jtaguart_console_init(void) +{ + register_console(&altera_jtaguart_console); + return 0; +} + +console_initcall(altera_jtaguart_console_init); + +#define ALTERA_JTAGUART_CONSOLE (&altera_jtaguart_console) + +#else + +#define ALTERA_JTAGUART_CONSOLE NULL + +#endif /* CONFIG_ALTERA_JTAGUART_CONSOLE */ + +static struct uart_driver altera_jtaguart_driver = { + .owner = THIS_MODULE, + .driver_name = "altera_jtaguart", + .dev_name = "ttyJ", + .major = ALTERA_JTAGUART_MAJOR, + .minor = ALTERA_JTAGUART_MINOR, + .nr = ALTERA_JTAGUART_MAXPORTS, + .cons = ALTERA_JTAGUART_CONSOLE, +}; + +static int __devinit altera_jtaguart_probe(struct platform_device *pdev) +{ + struct altera_jtaguart_platform_uart *platp = pdev->dev.platform_data; + struct uart_port *port; + int i; + + for (i = 0; i < ALTERA_JTAGUART_MAXPORTS && platp[i].mapbase; i++) { + port = &altera_jtaguart_ports[i].port; + + port->line = i; + port->type = PORT_ALTERA_JTAGUART; + port->mapbase = platp[i].mapbase; + port->membase = ioremap(port->mapbase, ALTERA_JTAGUART_SIZE); + port->iotype = SERIAL_IO_MEM; + port->irq = platp[i].irq; + port->ops = &altera_jtaguart_ops; + port->flags = ASYNC_BOOT_AUTOCONF; + + uart_add_one_port(&altera_jtaguart_driver, port); + } + + return 0; +} + +static int __devexit altera_jtaguart_remove(struct platform_device *pdev) +{ + struct uart_port *port; + int i; + + for (i = 0; i < ALTERA_JTAGUART_MAXPORTS; i++) { + port = &altera_jtaguart_ports[i].port; + if (port) + uart_remove_one_port(&altera_jtaguart_driver, port); + } + + return 0; +} + +static struct platform_driver altera_jtaguart_platform_driver = { + .probe = altera_jtaguart_probe, + .remove = __devexit_p(altera_jtaguart_remove), + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + }, +}; + +static int __init altera_jtaguart_init(void) +{ + int rc; + + rc = uart_register_driver(&altera_jtaguart_driver); + if (rc) + return rc; + rc = platform_driver_register(&altera_jtaguart_platform_driver); + if (rc) { + uart_unregister_driver(&altera_jtaguart_driver); + return rc; + } + return 0; +} + +static void __exit altera_jtaguart_exit(void) +{ + platform_driver_unregister(&altera_jtaguart_platform_driver); + uart_unregister_driver(&altera_jtaguart_driver); +} + +module_init(altera_jtaguart_init); +module_exit(altera_jtaguart_exit); + +MODULE_DESCRIPTION("Altera JTAG UART driver"); +MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); diff --git a/drivers/serial/altera_uart.c b/drivers/serial/altera_uart.c new file mode 100644 index 000000000000..bcee156d2f2e --- /dev/null +++ b/drivers/serial/altera_uart.c @@ -0,0 +1,570 @@ +/* + * altera_uart.c -- Altera UART driver + * + * Based on mcf.c -- Freescale ColdFire UART driver + * + * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com> + * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw> + * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch> + * + * 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 + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/console.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/altera_uart.h> + +#define DRV_NAME "altera_uart" + +/* + * Altera UART register definitions according to the Nios UART datasheet: + * http://www.altera.com/literature/ds/ds_nios_uart.pdf + */ + +#define ALTERA_UART_SIZE 32 + +#define ALTERA_UART_RXDATA_REG 0 +#define ALTERA_UART_TXDATA_REG 4 +#define ALTERA_UART_STATUS_REG 8 +#define ALTERA_UART_CONTROL_REG 12 +#define ALTERA_UART_DIVISOR_REG 16 +#define ALTERA_UART_EOP_REG 20 + +#define ALTERA_UART_STATUS_PE_MSK 0x0001 /* parity error */ +#define ALTERA_UART_STATUS_FE_MSK 0x0002 /* framing error */ +#define ALTERA_UART_STATUS_BRK_MSK 0x0004 /* break */ +#define ALTERA_UART_STATUS_ROE_MSK 0x0008 /* RX overrun error */ +#define ALTERA_UART_STATUS_TOE_MSK 0x0010 /* TX overrun error */ +#define ALTERA_UART_STATUS_TMT_MSK 0x0020 /* TX shift register state */ +#define ALTERA_UART_STATUS_TRDY_MSK 0x0040 /* TX ready */ +#define ALTERA_UART_STATUS_RRDY_MSK 0x0080 /* RX ready */ +#define ALTERA_UART_STATUS_E_MSK 0x0100 /* exception condition */ +#define ALTERA_UART_STATUS_DCTS_MSK 0x0400 /* CTS logic-level change */ +#define ALTERA_UART_STATUS_CTS_MSK 0x0800 /* CTS logic state */ +#define ALTERA_UART_STATUS_EOP_MSK 0x1000 /* EOP written/read */ + + /* Enable interrupt on... */ +#define ALTERA_UART_CONTROL_PE_MSK 0x0001 /* ...parity error */ +#define ALTERA_UART_CONTROL_FE_MSK 0x0002 /* ...framing error */ +#define ALTERA_UART_CONTROL_BRK_MSK 0x0004 /* ...break */ +#define ALTERA_UART_CONTROL_ROE_MSK 0x0008 /* ...RX overrun */ +#define ALTERA_UART_CONTROL_TOE_MSK 0x0010 /* ...TX overrun */ +#define ALTERA_UART_CONTROL_TMT_MSK 0x0020 /* ...TX shift register empty */ +#define ALTERA_UART_CONTROL_TRDY_MSK 0x0040 /* ...TX ready */ +#define ALTERA_UART_CONTROL_RRDY_MSK 0x0080 /* ...RX ready */ +#define ALTERA_UART_CONTROL_E_MSK 0x0100 /* ...exception*/ + +#define ALTERA_UART_CONTROL_TRBK_MSK 0x0200 /* TX break */ +#define ALTERA_UART_CONTROL_DCTS_MSK 0x0400 /* Interrupt on CTS change */ +#define ALTERA_UART_CONTROL_RTS_MSK 0x0800 /* RTS signal */ +#define ALTERA_UART_CONTROL_EOP_MSK 0x1000 /* Interrupt on EOP */ + +/* + * Local per-uart structure. + */ +struct altera_uart { + struct uart_port port; + unsigned int sigs; /* Local copy of line sigs */ + unsigned short imr; /* Local IMR mirror */ +}; + +static unsigned int altera_uart_tx_empty(struct uart_port *port) +{ + return (readl(port->membase + ALTERA_UART_STATUS_REG) & + ALTERA_UART_STATUS_TMT_MSK) ? TIOCSER_TEMT : 0; +} + +static unsigned int altera_uart_get_mctrl(struct uart_port *port) +{ + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned long flags; + unsigned int sigs; + + spin_lock_irqsave(&port->lock, flags); + sigs = + (readl(port->membase + ALTERA_UART_STATUS_REG) & + ALTERA_UART_STATUS_CTS_MSK) ? TIOCM_CTS : 0; + sigs |= (pp->sigs & TIOCM_RTS); + spin_unlock_irqrestore(&port->lock, flags); + + return sigs; +} + +static void altera_uart_set_mctrl(struct uart_port *port, unsigned int sigs) +{ + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + pp->sigs = sigs; + if (sigs & TIOCM_RTS) + pp->imr |= ALTERA_UART_CONTROL_RTS_MSK; + else + pp->imr &= ~ALTERA_UART_CONTROL_RTS_MSK; + writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); + spin_unlock_irqrestore(&port->lock, flags); +} + +static void altera_uart_start_tx(struct uart_port *port) +{ + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + pp->imr |= ALTERA_UART_CONTROL_TRDY_MSK; + writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); + spin_unlock_irqrestore(&port->lock, flags); +} + +static void altera_uart_stop_tx(struct uart_port *port) +{ + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; + writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); + spin_unlock_irqrestore(&port->lock, flags); +} + +static void altera_uart_stop_rx(struct uart_port *port) +{ + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + pp->imr &= ~ALTERA_UART_CONTROL_RRDY_MSK; + writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); + spin_unlock_irqrestore(&port->lock, flags); +} + +static void altera_uart_break_ctl(struct uart_port *port, int break_state) +{ + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + if (break_state == -1) + pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK; + else + pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK; + writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); + spin_unlock_irqrestore(&port->lock, flags); +} + +static void altera_uart_enable_ms(struct uart_port *port) +{ +} + +static void altera_uart_set_termios(struct uart_port *port, + struct ktermios *termios, + struct ktermios *old) +{ + unsigned long flags; + unsigned int baud, baudclk; + + baud = uart_get_baud_rate(port, termios, old, 0, 4000000); + baudclk = port->uartclk / baud; + + if (old) + tty_termios_copy_hw(termios, old); + tty_termios_encode_baud_rate(termios, baud, baud); + + spin_lock_irqsave(&port->lock, flags); + writel(baudclk, port->membase + ALTERA_UART_DIVISOR_REG); + spin_unlock_irqrestore(&port->lock, flags); +} + +static void altera_uart_rx_chars(struct altera_uart *pp) +{ + struct uart_port *port = &pp->port; + unsigned char ch, flag; + unsigned short status; + + while ((status = readl(port->membase + ALTERA_UART_STATUS_REG)) & + ALTERA_UART_STATUS_RRDY_MSK) { + ch = readl(port->membase + ALTERA_UART_RXDATA_REG); + flag = TTY_NORMAL; + port->icount.rx++; + + if (status & ALTERA_UART_STATUS_E_MSK) { + writel(status, port->membase + ALTERA_UART_STATUS_REG); + + if (status & ALTERA_UART_STATUS_BRK_MSK) { + port->icount.brk++; + if (uart_handle_break(port)) + continue; + } else if (status & ALTERA_UART_STATUS_PE_MSK) { + port->icount.parity++; + } else if (status & ALTERA_UART_STATUS_ROE_MSK) { + port->icount.overrun++; + } else if (status & ALTERA_UART_STATUS_FE_MSK) { + port->icount.frame++; + } + + status &= port->read_status_mask; + + if (status & ALTERA_UART_STATUS_BRK_MSK) + flag = TTY_BREAK; + else if (status & ALTERA_UART_STATUS_PE_MSK) + flag = TTY_PARITY; + else if (status & ALTERA_UART_STATUS_FE_MSK) + flag = TTY_FRAME; + } + + if (uart_handle_sysrq_char(port, ch)) + continue; + uart_insert_char(port, status, ALTERA_UART_STATUS_ROE_MSK, ch, + flag); + } + + tty_flip_buffer_push(port->state->port.tty); +} + +static void altera_uart_tx_chars(struct altera_uart *pp) +{ + struct uart_port *port = &pp->port; + struct circ_buf *xmit = &port->state->xmit; + + if (port->x_char) { + /* Send special char - probably flow control */ + writel(port->x_char, port->membase + ALTERA_UART_TXDATA_REG); + port->x_char = 0; + port->icount.tx++; + return; + } + + while (readl(port->membase + ALTERA_UART_STATUS_REG) & + ALTERA_UART_STATUS_TRDY_MSK) { + if (xmit->head == xmit->tail) + break; + writel(xmit->buf[xmit->tail], + port->membase + ALTERA_UART_TXDATA_REG); + 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 (xmit->head == xmit->tail) { + pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; + writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); + } +} + +static irqreturn_t altera_uart_interrupt(int irq, void *data) +{ + struct uart_port *port = data; + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned int isr; + + isr = readl(port->membase + ALTERA_UART_STATUS_REG) & pp->imr; + if (isr & ALTERA_UART_STATUS_RRDY_MSK) + altera_uart_rx_chars(pp); + if (isr & ALTERA_UART_STATUS_TRDY_MSK) + altera_uart_tx_chars(pp); + return IRQ_RETVAL(isr); +} + +static void altera_uart_config_port(struct uart_port *port, int flags) +{ + port->type = PORT_ALTERA_UART; + + /* Clear mask, so no surprise interrupts. */ + writel(0, port->membase + ALTERA_UART_CONTROL_REG); + /* Clear status register */ + writel(0, port->membase + ALTERA_UART_STATUS_REG); +} + +static int altera_uart_startup(struct uart_port *port) +{ + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned long flags; + int ret; + + ret = request_irq(port->irq, altera_uart_interrupt, IRQF_DISABLED, + DRV_NAME, port); + if (ret) { + pr_err(DRV_NAME ": unable to attach Altera UART %d " + "interrupt vector=%d\n", port->line, port->irq); + return ret; + } + + spin_lock_irqsave(&port->lock, flags); + + /* Enable RX interrupts now */ + pp->imr = ALTERA_UART_CONTROL_RRDY_MSK; + writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); + + spin_unlock_irqrestore(&port->lock, flags); + + return 0; +} + +static void altera_uart_shutdown(struct uart_port *port) +{ + struct altera_uart *pp = container_of(port, struct altera_uart, port); + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + + /* Disable all interrupts now */ + pp->imr = 0; + writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); + + spin_unlock_irqrestore(&port->lock, flags); + + free_irq(port->irq, port); +} + +static const char *altera_uart_type(struct uart_port *port) +{ + return (port->type == PORT_ALTERA_UART) ? "Altera UART" : NULL; +} + +static int altera_uart_request_port(struct uart_port *port) +{ + /* UARTs always present */ + return 0; +} + +static void altera_uart_release_port(struct uart_port *port) +{ + /* Nothing to release... */ +} + +static int altera_uart_verify_port(struct uart_port *port, + struct serial_struct *ser) +{ + if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_ALTERA_UART)) + return -EINVAL; + return 0; +} + +/* + * Define the basic serial functions we support. + */ +static struct uart_ops altera_uart_ops = { + .tx_empty = altera_uart_tx_empty, + .get_mctrl = altera_uart_get_mctrl, + .set_mctrl = altera_uart_set_mctrl, + .start_tx = altera_uart_start_tx, + .stop_tx = altera_uart_stop_tx, + .stop_rx = altera_uart_stop_rx, + .enable_ms = altera_uart_enable_ms, + .break_ctl = altera_uart_break_ctl, + .startup = altera_uart_startup, + .shutdown = altera_uart_shutdown, + .set_termios = altera_uart_set_termios, + .type = altera_uart_type, + .request_port = altera_uart_request_port, + .release_port = altera_uart_release_port, + .config_port = altera_uart_config_port, + .verify_port = altera_uart_verify_port, +}; + +static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS]; + +#if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) + +int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp) +{ + struct uart_port *port; + int i; + + for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) { + port = &altera_uart_ports[i].port; + + port->line = i; + port->type = PORT_ALTERA_UART; + port->mapbase = platp[i].mapbase; + port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); + port->iotype = SERIAL_IO_MEM; + port->irq = platp[i].irq; + port->uartclk = platp[i].uartclk; + port->flags = ASYNC_BOOT_AUTOCONF; + port->ops = &altera_uart_ops; + } + + return 0; +} + +static void altera_uart_console_putc(struct console *co, const char c) +{ + struct uart_port *port = &(altera_uart_ports + co->index)->port; + int i; + + for (i = 0; i < 0x10000; i++) { + if (readl(port->membase + ALTERA_UART_STATUS_REG) & + ALTERA_UART_STATUS_TRDY_MSK) + break; + } + writel(c, port->membase + ALTERA_UART_TXDATA_REG); + for (i = 0; i < 0x10000; i++) { + if (readl(port->membase + ALTERA_UART_STATUS_REG) & + ALTERA_UART_STATUS_TRDY_MSK) + break; + } +} + +static void altera_uart_console_write(struct console *co, const char *s, + unsigned int count) +{ + for (; count; count--, s++) { + altera_uart_console_putc(co, *s); + if (*s == '\n') + altera_uart_console_putc(co, '\r'); + } +} + +static int __init altera_uart_console_setup(struct console *co, char *options) +{ + struct uart_port *port; + int baud = CONFIG_SERIAL_ALTERA_UART_BAUDRATE; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + + if (co->index < 0 || co->index >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) + return -EINVAL; + port = &altera_uart_ports[co->index].port; + if (port->membase == 0) + return -ENODEV; + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + return uart_set_options(port, co, baud, parity, bits, flow); +} + +static struct uart_driver altera_uart_driver; + +static struct console altera_uart_console = { + .name = "ttyS", + .write = altera_uart_console_write, + .device = uart_console_device, + .setup = altera_uart_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &altera_uart_driver, +}; + +static int __init altera_uart_console_init(void) +{ + register_console(&altera_uart_console); + return 0; +} + +console_initcall(altera_uart_console_init); + +#define ALTERA_UART_CONSOLE (&altera_uart_console) + +#else + +#define ALTERA_UART_CONSOLE NULL + +#endif /* CONFIG_ALTERA_UART_CONSOLE */ + +/* + * Define the altera_uart UART driver structure. + */ +static struct uart_driver altera_uart_driver = { + .owner = THIS_MODULE, + .driver_name = DRV_NAME, + .dev_name = "ttyS", + .major = TTY_MAJOR, + .minor = 64, + .nr = CONFIG_SERIAL_ALTERA_UART_MAXPORTS, + .cons = ALTERA_UART_CONSOLE, +}; + +static int __devinit altera_uart_probe(struct platform_device *pdev) +{ + struct altera_uart_platform_uart *platp = pdev->dev.platform_data; + struct uart_port *port; + int i; + + for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) { + port = &altera_uart_ports[i].port; + + port->line = i; + port->type = PORT_ALTERA_UART; + port->mapbase = platp[i].mapbase; + port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); + port->iotype = SERIAL_IO_MEM; + port->irq = platp[i].irq; + port->uartclk = platp[i].uartclk; + port->ops = &altera_uart_ops; + port->flags = ASYNC_BOOT_AUTOCONF; + + uart_add_one_port(&altera_uart_driver, port); + } + + return 0; +} + +static int altera_uart_remove(struct platform_device *pdev) +{ + struct uart_port *port; + int i; + + for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS; i++) { + port = &altera_uart_ports[i].port; + if (port) + uart_remove_one_port(&altera_uart_driver, port); + } + + return 0; +} + +static struct platform_driver altera_uart_platform_driver = { + .probe = altera_uart_probe, + .remove = __devexit_p(altera_uart_remove), + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + .pm = NULL, + }, +}; + +static int __init altera_uart_init(void) +{ + int rc; + + rc = uart_register_driver(&altera_uart_driver); + if (rc) + return rc; + rc = platform_driver_register(&altera_uart_platform_driver); + if (rc) { + uart_unregister_driver(&altera_uart_driver); + return rc; + } + return 0; +} + +static void __exit altera_uart_exit(void) +{ + platform_driver_unregister(&altera_uart_platform_driver); + uart_unregister_driver(&altera_uart_driver); +} + +module_init(altera_uart_init); +module_exit(altera_uart_exit); + +MODULE_DESCRIPTION("Altera UART driver"); +MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c index 743ebf5f16da..eb4cb480b93e 100644 --- a/drivers/serial/amba-pl011.c +++ b/drivers/serial/amba-pl011.c @@ -342,9 +342,9 @@ static int pl010_get_poll_char(struct uart_port *port) struct uart_amba_port *uap = (struct uart_amba_port *)port; unsigned int status; - do { - status = readw(uap->port.membase + UART01x_FR); - } while (status & UART01x_FR_RXFE); + status = readw(uap->port.membase + UART01x_FR); + if (status & UART01x_FR_RXFE) + return NO_POLL_CHAR; return readw(uap->port.membase + UART01x_DR); } diff --git a/drivers/serial/apbuart.c b/drivers/serial/apbuart.c index fe91319b5f65..0099b8692b60 100644 --- a/drivers/serial/apbuart.c +++ b/drivers/serial/apbuart.c @@ -559,7 +559,7 @@ static int __devinit apbuart_probe(struct of_device *op, i = 0; for (i = 0; i < grlib_apbuart_port_nr; i++) { - if (op->node == grlib_apbuart_nodes[i]) + if (op->dev.of_node == grlib_apbuart_nodes[i]) break; } @@ -584,12 +584,12 @@ static struct of_device_id __initdata apbuart_match[] = { }; static struct of_platform_driver grlib_apbuart_of_driver = { - .match_table = apbuart_match, .probe = apbuart_probe, .driver = { - .owner = THIS_MODULE, - .name = "grlib-apbuart", - }, + .owner = THIS_MODULE, + .name = "grlib-apbuart", + .of_match_table = apbuart_match, + }, }; diff --git a/drivers/serial/bfin_sport_uart.c b/drivers/serial/bfin_sport_uart.c index c88f8ad3ff82..e57fb3d228e2 100644 --- a/drivers/serial/bfin_sport_uart.c +++ b/drivers/serial/bfin_sport_uart.c @@ -34,32 +34,12 @@ #include <linux/tty_flip.h> #include <linux/serial_core.h> +#include <asm/bfin_sport.h> #include <asm/delay.h> #include <asm/portmux.h> #include "bfin_sport_uart.h" -#ifdef CONFIG_SERIAL_BFIN_SPORT0_UART -unsigned short bfin_uart_pin_req_sport0[] = - {P_SPORT0_TFS, P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS, \ - P_SPORT0_DRPRI, P_SPORT0_RSCLK, P_SPORT0_DRSEC, P_SPORT0_DTSEC, 0}; -#endif -#ifdef CONFIG_SERIAL_BFIN_SPORT1_UART -unsigned short bfin_uart_pin_req_sport1[] = - {P_SPORT1_TFS, P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, \ - P_SPORT1_DRPRI, P_SPORT1_RSCLK, P_SPORT1_DRSEC, P_SPORT1_DTSEC, 0}; -#endif -#ifdef CONFIG_SERIAL_BFIN_SPORT2_UART -unsigned short bfin_uart_pin_req_sport2[] = - {P_SPORT2_TFS, P_SPORT2_DTPRI, P_SPORT2_TSCLK, P_SPORT2_RFS, \ - P_SPORT2_DRPRI, P_SPORT2_RSCLK, P_SPORT2_DRSEC, P_SPORT2_DTSEC, 0}; -#endif -#ifdef CONFIG_SERIAL_BFIN_SPORT3_UART -unsigned short bfin_uart_pin_req_sport3[] = - {P_SPORT3_TFS, P_SPORT3_DTPRI, P_SPORT3_TSCLK, P_SPORT3_RFS, \ - P_SPORT3_DRPRI, P_SPORT3_RSCLK, P_SPORT3_DRSEC, P_SPORT3_DTSEC, 0}; -#endif - struct sport_uart_port { struct uart_port port; int err_irq; @@ -69,9 +49,13 @@ struct sport_uart_port { unsigned short txmask2; unsigned char stopb; /* unsigned char parib; */ +#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS + int cts_pin; + int rts_pin; +#endif }; -static void sport_uart_tx_chars(struct sport_uart_port *up); +static int sport_uart_tx_chars(struct sport_uart_port *up); static void sport_stop_tx(struct uart_port *port); static inline void tx_one_byte(struct sport_uart_port *up, unsigned int value) @@ -219,6 +203,59 @@ static irqreturn_t sport_uart_err_irq(int irq, void *dev_id) return IRQ_HANDLED; } +#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS +static unsigned int sport_get_mctrl(struct uart_port *port) +{ + struct sport_uart_port *up = (struct sport_uart_port *)port; + if (up->cts_pin < 0) + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; + + /* CTS PIN is negative assertive. */ + if (SPORT_UART_GET_CTS(up)) + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; + else + return TIOCM_DSR | TIOCM_CAR; +} + +static void sport_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + struct sport_uart_port *up = (struct sport_uart_port *)port; + if (up->rts_pin < 0) + return; + + /* RTS PIN is negative assertive. */ + if (mctrl & TIOCM_RTS) + SPORT_UART_ENABLE_RTS(up); + else + SPORT_UART_DISABLE_RTS(up); +} + +/* + * Handle any change of modem status signal. + */ +static irqreturn_t sport_mctrl_cts_int(int irq, void *dev_id) +{ + struct sport_uart_port *up = (struct sport_uart_port *)dev_id; + unsigned int status; + + status = sport_get_mctrl(&up->port); + uart_handle_cts_change(&up->port, status & TIOCM_CTS); + + return IRQ_HANDLED; +} +#else +static unsigned int sport_get_mctrl(struct uart_port *port) +{ + pr_debug("%s enter\n", __func__); + return TIOCM_CTS | TIOCM_CD | TIOCM_DSR; +} + +static void sport_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + pr_debug("%s enter\n", __func__); +} +#endif + /* Reqeust IRQ, Setup clock */ static int sport_startup(struct uart_port *port) { @@ -247,6 +284,21 @@ static int sport_startup(struct uart_port *port) goto fail2; } +#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS + if (up->cts_pin >= 0) { + if (request_irq(gpio_to_irq(up->cts_pin), + sport_mctrl_cts_int, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | + IRQF_DISABLED, "BFIN_SPORT_UART_CTS", up)) { + up->cts_pin = -1; + dev_info(port->dev, "Unable to attach BlackFin UART \ + over SPORT CTS interrupt. So, disable it.\n"); + } + } + if (up->rts_pin >= 0) + gpio_direction_output(up->rts_pin, 0); +#endif + return 0; fail2: free_irq(up->port.irq+1, up); @@ -256,23 +308,35 @@ static int sport_startup(struct uart_port *port) return ret; } -static void sport_uart_tx_chars(struct sport_uart_port *up) +/* + * sport_uart_tx_chars + * + * ret 1 means need to enable sport. + * ret 0 means do nothing. + */ +static int sport_uart_tx_chars(struct sport_uart_port *up) { struct circ_buf *xmit = &up->port.state->xmit; if (SPORT_GET_STAT(up) & TXF) - return; + return 0; if (up->port.x_char) { tx_one_byte(up, up->port.x_char); up->port.icount.tx++; up->port.x_char = 0; - return; + return 1; } if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - sport_stop_tx(&up->port); - return; + /* The waiting loop to stop SPORT TX from TX interrupt is + * too long. This may block SPORT RX interrupts and cause + * RX FIFO overflow. So, do stop sport TX only after the last + * char in TX FIFO is moved into the shift register. + */ + if (SPORT_GET_STAT(up) & TXHRE) + sport_stop_tx(&up->port); + return 0; } while(!(SPORT_GET_STAT(up) & TXF) && !uart_circ_empty(xmit)) { @@ -283,6 +347,8 @@ static void sport_uart_tx_chars(struct sport_uart_port *up) if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(&up->port); + + return 1; } static unsigned int sport_tx_empty(struct uart_port *port) @@ -298,23 +364,15 @@ static unsigned int sport_tx_empty(struct uart_port *port) return 0; } -static unsigned int sport_get_mctrl(struct uart_port *port) -{ - pr_debug("%s enter\n", __func__); - return (TIOCM_CTS | TIOCM_CD | TIOCM_DSR); -} - -static void sport_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - pr_debug("%s enter\n", __func__); -} - static void sport_stop_tx(struct uart_port *port) { struct sport_uart_port *up = (struct sport_uart_port *)port; pr_debug("%s enter\n", __func__); + if (!(SPORT_GET_TCR1(up) & TSPEN)) + return; + /* Although the hold register is empty, last byte is still in shift * register and not sent out yet. So, put a dummy data into TX FIFO. * Then, sport tx stops when last byte is shift out and the dummy @@ -337,11 +395,12 @@ static void sport_start_tx(struct uart_port *port) pr_debug("%s enter\n", __func__); /* Write data into SPORT FIFO before enable SPROT to transmit */ - sport_uart_tx_chars(up); + if (sport_uart_tx_chars(up)) { + /* Enable transmit, then an interrupt will generated */ + SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) | TSPEN)); + SSYNC(); + } - /* Enable transmit, then an interrupt will generated */ - SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) | TSPEN)); - SSYNC(); pr_debug("%s exit\n", __func__); } @@ -379,6 +438,10 @@ static void sport_shutdown(struct uart_port *port) free_irq(up->port.irq, up); free_irq(up->port.irq+1, up); free_irq(up->err_irq, up); +#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS + if (up->cts_pin >= 0) + free_irq(gpio_to_irq(up->cts_pin), up); +#endif } static const char *sport_type(struct uart_port *port) @@ -448,27 +511,14 @@ static void sport_set_termios(struct uart_port *port, /* up->parib = 1; */ } - port->read_status_mask = OE; - if (termios->c_iflag & INPCK) - port->read_status_mask |= (FE | PE); - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= BI; + spin_lock_irqsave(&up->port.lock, flags); + + port->read_status_mask = 0; /* * Characters to ignore */ port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= FE | PE; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= OE; - } /* RX extract mask */ up->rxmask = 0x01 | (((up->csize + up->stopb) * 2 - 1) << 0x8); @@ -488,8 +538,6 @@ static void sport_set_termios(struct uart_port *port, /* uart baud rate */ port->uartclk = uart_get_baud_rate(port, termios, old, 0, get_sclk()/16); - spin_lock_irqsave(&up->port.lock, flags); - /* Disable UART */ SPORT_PUT_TCR1(up, SPORT_GET_TCR1(up) & ~TSPEN); SPORT_PUT_RCR1(up, SPORT_GET_RCR1(up) & ~RSPEN); @@ -542,6 +590,8 @@ struct uart_ops sport_uart_ops = { static struct sport_uart_port *bfin_sport_uart_ports[BFIN_SPORT_UART_MAX_PORTS]; #ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE +#define CLASS_BFIN_SPORT_CONSOLE "bfin-sport-console" + static int __init sport_uart_console_setup(struct console *co, char *options) { @@ -549,7 +599,11 @@ sport_uart_console_setup(struct console *co, char *options) int baud = 57600; int bits = 8; int parity = 'n'; +# ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS + int flow = 'r'; +# else int flow = 'n'; +# endif /* Check whether an invalid uart number has been specified */ if (co->index < 0 || co->index >= BFIN_SPORT_UART_MAX_PORTS) @@ -690,11 +744,11 @@ static int __devinit sport_uart_probe(struct platform_device *pdev) if (bfin_sport_uart_ports[pdev->id] == NULL) { bfin_sport_uart_ports[pdev->id] = - kmalloc(sizeof(struct sport_uart_port), GFP_KERNEL); + kzalloc(sizeof(struct sport_uart_port), GFP_KERNEL); sport = bfin_sport_uart_ports[pdev->id]; if (!sport) { dev_err(&pdev->dev, - "Fail to kmalloc sport_uart_port\n"); + "Fail to malloc sport_uart_port\n"); return -ENOMEM; } @@ -720,13 +774,13 @@ static int __devinit sport_uart_probe(struct platform_device *pdev) goto out_error_free_peripherals; } - sport->port.membase = ioremap(res->start, - res->end - res->start); + sport->port.membase = ioremap(res->start, resource_size(res)); if (!sport->port.membase) { dev_err(&pdev->dev, "Cannot map sport IO\n"); ret = -ENXIO; goto out_error_free_peripherals; } + sport->port.mapbase = res->start; sport->port.irq = platform_get_irq(pdev, 0); if (sport->port.irq < 0) { @@ -741,6 +795,22 @@ static int __devinit sport_uart_probe(struct platform_device *pdev) ret = -ENOENT; goto out_error_unmap; } +#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (res == NULL) + sport->cts_pin = -1; + else + sport->cts_pin = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IO, 1); + if (res == NULL) + sport->rts_pin = -1; + else + sport->rts_pin = res->start; + + if (sport->rts_pin >= 0) + gpio_request(sport->rts_pin, DRV_NAME); +#endif } #ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE @@ -779,6 +849,10 @@ static int __devexit sport_uart_remove(struct platform_device *pdev) if (sport) { uart_remove_one_port(&sport_uart_reg, &sport->port); +#ifdef CONFIG_SERIAL_BFIN_CTSRTS + if (sport->rts_pin >= 0) + gpio_free(sport->rts_pin); +#endif iounmap(sport->port.membase); peripheral_free_list( (unsigned short *)pdev->dev.platform_data); @@ -802,7 +876,7 @@ static struct platform_driver sport_uart_driver = { #ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE static __initdata struct early_platform_driver early_sport_uart_driver = { - .class_str = DRV_NAME, + .class_str = CLASS_BFIN_SPORT_CONSOLE, .pdrv = &sport_uart_driver, .requested_id = EARLY_PLATFORM_ID_UNSET, }; @@ -811,7 +885,8 @@ static int __init sport_uart_rs_console_init(void) { early_platform_driver_register(&early_sport_uart_driver, DRV_NAME); - early_platform_driver_probe(DRV_NAME, BFIN_SPORT_UART_MAX_PORTS, 0); + early_platform_driver_probe(CLASS_BFIN_SPORT_CONSOLE, + BFIN_SPORT_UART_MAX_PORTS, 0); register_console(&sport_uart_console); @@ -824,7 +899,7 @@ static int __init sport_uart_init(void) { int ret; - pr_info("Serial: Blackfin uart over sport driver\n"); + pr_info("Blackfin uart over sport driver\n"); ret = uart_register_driver(&sport_uart_reg); if (ret) { diff --git a/drivers/serial/bfin_sport_uart.h b/drivers/serial/bfin_sport_uart.h index abe03614e4df..9ce253e381d2 100644 --- a/drivers/serial/bfin_sport_uart.h +++ b/drivers/serial/bfin_sport_uart.h @@ -37,7 +37,21 @@ #define SPORT_GET_TFSDIV(sport) bfin_read16(((sport)->port.membase + OFFSET_TFSDIV)) #define SPORT_GET_TX(sport) bfin_read16(((sport)->port.membase + OFFSET_TX)) #define SPORT_GET_RX(sport) bfin_read16(((sport)->port.membase + OFFSET_RX)) -#define SPORT_GET_RX32(sport) bfin_read32(((sport)->port.membase + OFFSET_RX)) +/* + * If another interrupt fires while doing a 32-bit read from RX FIFO, + * a fake RX underflow error will be generated. So disable interrupts + * to prevent interruption while reading the FIFO. + */ +#define SPORT_GET_RX32(sport) \ +({ \ + unsigned int __ret; \ + if (ANOMALY_05000473) \ + local_irq_disable(); \ + __ret = bfin_read32((sport)->port.membase + OFFSET_RX); \ + if (ANOMALY_05000473) \ + local_irq_enable(); \ + __ret; \ +}) #define SPORT_GET_RCR1(sport) bfin_read16(((sport)->port.membase + OFFSET_RCR1)) #define SPORT_GET_RCR2(sport) bfin_read16(((sport)->port.membase + OFFSET_RCR2)) #define SPORT_GET_RCLKDIV(sport) bfin_read16(((sport)->port.membase + OFFSET_RCLKDIV)) @@ -58,4 +72,15 @@ #define SPORT_TX_FIFO_SIZE 8 +#define SPORT_UART_GET_CTS(x) gpio_get_value(x->cts_pin) +#define SPORT_UART_DISABLE_RTS(x) gpio_set_value(x->rts_pin, 1) +#define SPORT_UART_ENABLE_RTS(x) gpio_set_value(x->rts_pin, 0) + +#if defined(CONFIG_SERIAL_BFIN_SPORT0_UART_CTSRTS) \ + || defined(CONFIG_SERIAL_BFIN_SPORT1_UART_CTSRTS) \ + || defined(CONFIG_SERIAL_BFIN_SPORT2_UART_CTSRTS) \ + || defined(CONFIG_SERIAL_BFIN_SPORT3_UART_CTSRTS) +# define CONFIG_SERIAL_BFIN_SPORT_CTSRTS +#endif + #endif /* _BFIN_SPORT_UART_H */ diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c index 300cea768d74..9eb62a256e9a 100644 --- a/drivers/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/serial/cpm_uart/cpm_uart_core.c @@ -1342,7 +1342,7 @@ static int __devinit cpm_uart_probe(struct of_device *ofdev, /* initialize the device pointer for the port */ pinfo->port.dev = &ofdev->dev; - ret = cpm_uart_init_port(ofdev->node, pinfo); + ret = cpm_uart_init_port(ofdev->dev.of_node, pinfo); if (ret) return ret; @@ -1372,8 +1372,11 @@ static struct of_device_id cpm_uart_match[] = { }; static struct of_platform_driver cpm_uart_driver = { - .name = "cpm_uart", - .match_table = cpm_uart_match, + .driver = { + .name = "cpm_uart", + .owner = THIS_MODULE, + .of_match_table = cpm_uart_match, + }, .probe = cpm_uart_probe, .remove = cpm_uart_remove, }; diff --git a/drivers/serial/kgdboc.c b/drivers/serial/kgdboc.c index eadc1ab6bbce..a9a94ae72349 100644 --- a/drivers/serial/kgdboc.c +++ b/drivers/serial/kgdboc.c @@ -14,7 +14,9 @@ #include <linux/kernel.h> #include <linux/ctype.h> #include <linux/kgdb.h> +#include <linux/kdb.h> #include <linux/tty.h> +#include <linux/console.h> #define MAX_CONFIG_LEN 40 @@ -32,6 +34,40 @@ static struct kparam_string kps = { static struct tty_driver *kgdb_tty_driver; static int kgdb_tty_line; +#ifdef CONFIG_KDB_KEYBOARD +static int kgdboc_register_kbd(char **cptr) +{ + if (strncmp(*cptr, "kbd", 3) == 0) { + if (kdb_poll_idx < KDB_POLL_FUNC_MAX) { + kdb_poll_funcs[kdb_poll_idx] = kdb_get_kbd_char; + kdb_poll_idx++; + if (cptr[0][3] == ',') + *cptr += 4; + else + return 1; + } + } + return 0; +} + +static void kgdboc_unregister_kbd(void) +{ + int i; + + for (i = 0; i < kdb_poll_idx; i++) { + if (kdb_poll_funcs[i] == kdb_get_kbd_char) { + kdb_poll_idx--; + kdb_poll_funcs[i] = kdb_poll_funcs[kdb_poll_idx]; + kdb_poll_funcs[kdb_poll_idx] = NULL; + i--; + } + } +} +#else /* ! CONFIG_KDB_KEYBOARD */ +#define kgdboc_register_kbd(x) 0 +#define kgdboc_unregister_kbd() +#endif /* ! CONFIG_KDB_KEYBOARD */ + static int kgdboc_option_setup(char *opt) { if (strlen(opt) > MAX_CONFIG_LEN) { @@ -45,25 +81,51 @@ static int kgdboc_option_setup(char *opt) __setup("kgdboc=", kgdboc_option_setup); +static void cleanup_kgdboc(void) +{ + kgdboc_unregister_kbd(); + if (configured == 1) + kgdb_unregister_io_module(&kgdboc_io_ops); +} + static int configure_kgdboc(void) { struct tty_driver *p; int tty_line = 0; int err; + char *cptr = config; + struct console *cons; err = kgdboc_option_setup(config); if (err || !strlen(config) || isspace(config[0])) goto noconfig; err = -ENODEV; + kgdboc_io_ops.is_console = 0; + kgdb_tty_driver = NULL; - p = tty_find_polling_driver(config, &tty_line); + if (kgdboc_register_kbd(&cptr)) + goto do_register; + + p = tty_find_polling_driver(cptr, &tty_line); if (!p) goto noconfig; + cons = console_drivers; + while (cons) { + int idx; + if (cons->device && cons->device(cons, &idx) == p && + idx == tty_line) { + kgdboc_io_ops.is_console = 1; + break; + } + cons = cons->next; + } + kgdb_tty_driver = p; kgdb_tty_line = tty_line; +do_register: err = kgdb_register_io_module(&kgdboc_io_ops); if (err) goto noconfig; @@ -75,6 +137,7 @@ static int configure_kgdboc(void) noconfig: config[0] = 0; configured = 0; + cleanup_kgdboc(); return err; } @@ -88,20 +151,18 @@ static int __init init_kgdboc(void) return configure_kgdboc(); } -static void cleanup_kgdboc(void) -{ - if (configured == 1) - kgdb_unregister_io_module(&kgdboc_io_ops); -} - static int kgdboc_get_char(void) { + if (!kgdb_tty_driver) + return -1; return kgdb_tty_driver->ops->poll_get_char(kgdb_tty_driver, kgdb_tty_line); } static void kgdboc_put_char(u8 chr) { + if (!kgdb_tty_driver) + return; kgdb_tty_driver->ops->poll_put_char(kgdb_tty_driver, kgdb_tty_line, chr); } @@ -162,6 +223,25 @@ static struct kgdb_io kgdboc_io_ops = { .post_exception = kgdboc_post_exp_handler, }; +#ifdef CONFIG_KGDB_SERIAL_CONSOLE +/* This is only available if kgdboc is a built in for early debugging */ +int __init kgdboc_early_init(char *opt) +{ + /* save the first character of the config string because the + * init routine can destroy it. + */ + char save_ch; + + kgdboc_option_setup(opt); + save_ch = config[0]; + init_kgdboc(); + config[0] = save_ch; + return 0; +} + +early_param("ekgdboc", kgdboc_early_init); +#endif /* CONFIG_KGDB_SERIAL_CONSOLE */ + module_init(init_kgdboc); module_exit(cleanup_kgdboc); module_param_call(kgdboc, param_set_kgdboc_var, param_get_string, &kps, 0644); diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c index 02469c31bf0b..84a35f699016 100644 --- a/drivers/serial/mpc52xx_uart.c +++ b/drivers/serial/mpc52xx_uart.c @@ -397,34 +397,10 @@ static unsigned long mpc512x_getuartclk(void *p) return mpc5xxx_get_bus_frequency(p); } -#define DEFAULT_FIFO_SIZE 16 - -static unsigned int __init get_fifo_size(struct device_node *np, - char *fifo_name) -{ - const unsigned int *fp; - - fp = of_get_property(np, fifo_name, NULL); - if (fp) - return *fp; - - pr_warning("no %s property in %s node, defaulting to %d\n", - fifo_name, np->full_name, DEFAULT_FIFO_SIZE); - - return DEFAULT_FIFO_SIZE; -} - -#define FIFOC(_base) ((struct mpc512x_psc_fifo __iomem *) \ - ((u32)(_base) + sizeof(struct mpc52xx_psc))) - /* Init PSC FIFO Controller */ static int __init mpc512x_psc_fifoc_init(void) { struct device_node *np; - void __iomem *psc; - unsigned int tx_fifo_size; - unsigned int rx_fifo_size; - int fifobase = 0; /* current fifo address in 32 bit words */ np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-psc-fifo"); @@ -447,51 +423,6 @@ static int __init mpc512x_psc_fifoc_init(void) return -ENODEV; } - for_each_compatible_node(np, NULL, "fsl,mpc5121-psc-uart") { - tx_fifo_size = get_fifo_size(np, "fsl,tx-fifo-size"); - rx_fifo_size = get_fifo_size(np, "fsl,rx-fifo-size"); - - /* size in register is in 4 byte units */ - tx_fifo_size /= 4; - rx_fifo_size /= 4; - if (!tx_fifo_size) - tx_fifo_size = 1; - if (!rx_fifo_size) - rx_fifo_size = 1; - - psc = of_iomap(np, 0); - if (!psc) { - pr_err("%s: Can't map %s device\n", - __func__, np->full_name); - continue; - } - - /* FIFO space is 4KiB, check if requested size is available */ - if ((fifobase + tx_fifo_size + rx_fifo_size) > 0x1000) { - pr_err("%s: no fifo space available for %s\n", - __func__, np->full_name); - iounmap(psc); - /* - * chances are that another device requests less - * fifo space, so we continue. - */ - continue; - } - /* set tx and rx fifo size registers */ - out_be32(&FIFOC(psc)->txsz, (fifobase << 16) | tx_fifo_size); - fifobase += tx_fifo_size; - out_be32(&FIFOC(psc)->rxsz, (fifobase << 16) | rx_fifo_size); - fifobase += rx_fifo_size; - - /* reset and enable the slices */ - out_be32(&FIFOC(psc)->txcmd, 0x80); - out_be32(&FIFOC(psc)->txcmd, 0x01); - out_be32(&FIFOC(psc)->rxcmd, 0x80); - out_be32(&FIFOC(psc)->rxcmd, 0x01); - - iounmap(psc); - } - return 0; } @@ -1295,14 +1226,14 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match) /* Check validity & presence */ for (idx = 0; idx < MPC52xx_PSC_MAXNUM; idx++) - if (mpc52xx_uart_nodes[idx] == op->node) + if (mpc52xx_uart_nodes[idx] == op->dev.of_node) break; if (idx >= MPC52xx_PSC_MAXNUM) return -EINVAL; pr_debug("Found %s assigned to ttyPSC%x\n", mpc52xx_uart_nodes[idx]->full_name, idx); - uartclk = psc_ops->getuartclk(op->node); + uartclk = psc_ops->getuartclk(op->dev.of_node); if (uartclk == 0) { dev_dbg(&op->dev, "Could not find uart clock frequency!\n"); return -EINVAL; @@ -1322,7 +1253,7 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match) port->dev = &op->dev; /* Search for IRQ and mapbase */ - ret = of_address_to_resource(op->node, 0, &res); + ret = of_address_to_resource(op->dev.of_node, 0, &res); if (ret) return ret; @@ -1332,7 +1263,7 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match) return -EINVAL; } - psc_ops->get_irq(port, op->node); + psc_ops->get_irq(port, op->dev.of_node); if (port->irq == NO_IRQ) { dev_dbg(&op->dev, "Could not get irq\n"); return -EINVAL; @@ -1431,15 +1362,16 @@ mpc52xx_uart_of_enumerate(void) MODULE_DEVICE_TABLE(of, mpc52xx_uart_of_match); static struct of_platform_driver mpc52xx_uart_of_driver = { - .match_table = mpc52xx_uart_of_match, .probe = mpc52xx_uart_of_probe, .remove = mpc52xx_uart_of_remove, #ifdef CONFIG_PM .suspend = mpc52xx_uart_of_suspend, .resume = mpc52xx_uart_of_resume, #endif - .driver = { - .name = "mpc52xx-psc-uart", + .driver = { + .name = "mpc52xx-psc-uart", + .owner = THIS_MODULE, + .of_match_table = mpc52xx_uart_of_match, }, }; diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c index 55e113a0be03..6a9c6605666a 100644 --- a/drivers/serial/mpsc.c +++ b/drivers/serial/mpsc.c @@ -2071,6 +2071,7 @@ static int mpsc_drv_probe(struct platform_device *dev) if (!(rc = mpsc_drv_map_regs(pi, dev))) { mpsc_drv_get_platform_data(pi, dev, dev->id); + pi->port.dev = &dev->dev; if (!(rc = mpsc_make_ready(pi))) { spin_lock_init(&pi->tx_lock); diff --git a/drivers/serial/nwpserial.c b/drivers/serial/nwpserial.c index e1ab8ec0a4a6..3c02fa96f282 100644 --- a/drivers/serial/nwpserial.c +++ b/drivers/serial/nwpserial.c @@ -344,7 +344,7 @@ int nwpserial_register_port(struct uart_port *port) mutex_lock(&nwpserial_mutex); - dn = to_of_device(port->dev)->node; + dn = to_of_device(port->dev)->dev.of_node; if (dn == NULL) goto out; diff --git a/drivers/serial/of_serial.c b/drivers/serial/of_serial.c index 4abfebdb0fcc..a48d9080f552 100644 --- a/drivers/serial/of_serial.c +++ b/drivers/serial/of_serial.c @@ -31,7 +31,7 @@ static int __devinit of_platform_serial_setup(struct of_device *ofdev, int type, struct uart_port *port) { struct resource resource; - struct device_node *np = ofdev->node; + struct device_node *np = ofdev->dev.of_node; const unsigned int *clk, *spd; const u32 *prop; int ret, prop_size; @@ -88,7 +88,7 @@ static int __devinit of_platform_serial_probe(struct of_device *ofdev, int port_type; int ret; - if (of_find_property(ofdev->node, "used-by-rtas", NULL)) + if (of_find_property(ofdev->dev.of_node, "used-by-rtas", NULL)) return -EBUSY; info = kmalloc(sizeof(*info), GFP_KERNEL); @@ -175,11 +175,13 @@ static struct of_device_id __devinitdata of_platform_serial_table[] = { }; static struct of_platform_driver of_platform_serial_driver = { - .owner = THIS_MODULE, - .name = "of_serial", + .driver = { + .name = "of_serial", + .owner = THIS_MODULE, + .of_match_table = of_platform_serial_table, + }, .probe = of_platform_serial_probe, .remove = of_platform_serial_remove, - .match_table = of_platform_serial_table, }; static int __init of_platform_serial_init(void) diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c index 700e10833bf9..cabbdc7ba583 100644 --- a/drivers/serial/pmac_zilog.c +++ b/drivers/serial/pmac_zilog.c @@ -1611,7 +1611,7 @@ static int pmz_attach(struct macio_dev *mdev, const struct of_device_id *match) /* Iterate the pmz_ports array to find a matching entry */ for (i = 0; i < MAX_ZS_PORTS; i++) - if (pmz_ports[i].node == mdev->ofdev.node) { + if (pmz_ports[i].node == mdev->ofdev.dev.of_node) { struct uart_pmac_port *uap = &pmz_ports[i]; uap->dev = mdev; diff --git a/drivers/serial/s5pv210.c b/drivers/serial/s5pv210.c index 8dc03837617b..4a789e5361a4 100644 --- a/drivers/serial/s5pv210.c +++ b/drivers/serial/s5pv210.c @@ -119,7 +119,7 @@ static int s5p_serial_probe(struct platform_device *pdev) return s3c24xx_serial_probe(pdev, s5p_uart_inf[pdev->id]); } -static struct platform_driver s5p_serial_drv = { +static struct platform_driver s5p_serial_driver = { .probe = s5p_serial_probe, .remove = __devexit_p(s3c24xx_serial_remove), .driver = { @@ -130,19 +130,19 @@ static struct platform_driver s5p_serial_drv = { static int __init s5pv210_serial_console_init(void) { - return s3c24xx_serial_initconsole(&s5p_serial_drv, s5p_uart_inf); + return s3c24xx_serial_initconsole(&s5p_serial_driver, s5p_uart_inf); } console_initcall(s5pv210_serial_console_init); static int __init s5p_serial_init(void) { - return s3c24xx_serial_init(&s5p_serial_drv, *s5p_uart_inf); + return s3c24xx_serial_init(&s5p_serial_driver, *s5p_uart_inf); } static void __exit s5p_serial_exit(void) { - platform_driver_unregister(&s5p_serial_drv); + platform_driver_unregister(&s5p_serial_driver); } module_init(s5p_serial_init); diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c index 8d993c4cceac..5f90fcd7d107 100644 --- a/drivers/serial/sh-sci.c +++ b/drivers/serial/sh-sci.c @@ -151,7 +151,11 @@ static int sci_poll_get_char(struct uart_port *port) handle_error(port); continue; } - } while (!(status & SCxSR_RDxF(port))); + break; + } while (1); + + if (!(status & SCxSR_RDxF(port))) + return NO_POLL_CHAR; c = sci_in(port, SCxRDR); @@ -1000,8 +1004,9 @@ static void sci_rx_dma_release(struct sci_port *s, bool enable_pio) s->chan_rx = NULL; s->cookie_rx[0] = s->cookie_rx[1] = -EINVAL; dma_release_channel(chan); - dma_free_coherent(port->dev, s->buf_len_rx * 2, - sg_virt(&s->sg_rx[0]), sg_dma_address(&s->sg_rx[0])); + if (sg_dma_address(&s->sg_rx[0])) + dma_free_coherent(port->dev, s->buf_len_rx * 2, + sg_virt(&s->sg_rx[0]), sg_dma_address(&s->sg_rx[0])); if (enable_pio) sci_start_rx(port); } @@ -1087,7 +1092,7 @@ static void work_fn_rx(struct work_struct *work) unsigned long flags; int count; - chan->device->device_terminate_all(chan); + chan->device->device_control(chan, DMA_TERMINATE_ALL, 0); dev_dbg(port->dev, "Read %u bytes with cookie %d\n", sh_desc->partial, sh_desc->cookie); diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c index d14cca7fb88d..890f91742962 100644 --- a/drivers/serial/sunhv.c +++ b/drivers/serial/sunhv.c @@ -565,7 +565,7 @@ static int __devinit hv_probe(struct of_device *op, const struct of_device_id *m if (err) goto out_free_con_read_page; - sunserial_console_match(&sunhv_console, op->node, + sunserial_console_match(&sunhv_console, op->dev.of_node, &sunhv_reg, port->line, false); err = uart_add_one_port(&sunhv_reg, port); @@ -630,8 +630,11 @@ static const struct of_device_id hv_match[] = { MODULE_DEVICE_TABLE(of, hv_match); static struct of_platform_driver hv_driver = { - .name = "hv", - .match_table = hv_match, + .driver = { + .name = "hv", + .owner = THIS_MODULE, + .of_match_table = hv_match, + }, .probe = hv_probe, .remove = __devexit_p(hv_remove), }; diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c index d2e0321049e2..5e81bc6b48b0 100644 --- a/drivers/serial/sunsab.c +++ b/drivers/serial/sunsab.c @@ -883,7 +883,7 @@ static int sunsab_console_setup(struct console *con, char *options) printk("Console: ttyS%d (SAB82532)\n", (sunsab_reg.minor - 64) + con->index); - sunserial_console_termios(con, to_of_device(up->port.dev)->node); + sunserial_console_termios(con, to_of_device(up->port.dev)->dev.of_node); switch (con->cflag & CBAUD) { case B150: baud = 150; break; @@ -1026,11 +1026,11 @@ static int __devinit sab_probe(struct of_device *op, const struct of_device_id * if (err) goto out1; - sunserial_console_match(SUNSAB_CONSOLE(), op->node, + sunserial_console_match(SUNSAB_CONSOLE(), op->dev.of_node, &sunsab_reg, up[0].port.line, false); - sunserial_console_match(SUNSAB_CONSOLE(), op->node, + sunserial_console_match(SUNSAB_CONSOLE(), op->dev.of_node, &sunsab_reg, up[1].port.line, false); @@ -1093,8 +1093,11 @@ static const struct of_device_id sab_match[] = { MODULE_DEVICE_TABLE(of, sab_match); static struct of_platform_driver sab_driver = { - .name = "sab", - .match_table = sab_match, + .driver = { + .name = "sab", + .owner = THIS_MODULE, + .of_match_table = sab_match, + }, .probe = sab_probe, .remove = __devexit_p(sab_remove), }; diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c index 01f7731e59b8..234459c2f012 100644 --- a/drivers/serial/sunsu.c +++ b/drivers/serial/sunsu.c @@ -1200,7 +1200,7 @@ static int __devinit sunsu_kbd_ms_init(struct uart_sunsu_port *up) return -ENODEV; printk("%s: %s port at %llx, irq %u\n", - to_of_device(up->port.dev)->node->full_name, + to_of_device(up->port.dev)->dev.of_node->full_name, (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse", (unsigned long long) up->port.mapbase, up->port.irq); @@ -1352,7 +1352,7 @@ static int __init sunsu_console_setup(struct console *co, char *options) spin_lock_init(&port->lock); /* Get firmware console settings. */ - sunserial_console_termios(co, to_of_device(port->dev)->node); + sunserial_console_termios(co, to_of_device(port->dev)->dev.of_node); memset(&termios, 0, sizeof(struct ktermios)); termios.c_cflag = co->cflag; @@ -1409,7 +1409,7 @@ static enum su_type __devinit su_get_type(struct device_node *dp) static int __devinit su_probe(struct of_device *op, const struct of_device_id *match) { static int inst; - struct device_node *dp = op->node; + struct device_node *dp = op->dev.of_node; struct uart_sunsu_port *up; struct resource *rp; enum su_type type; @@ -1539,8 +1539,11 @@ static const struct of_device_id su_match[] = { MODULE_DEVICE_TABLE(of, su_match); static struct of_platform_driver su_driver = { - .name = "su", - .match_table = su_match, + .driver = { + .name = "su", + .owner = THIS_MODULE, + .of_match_table = su_match, + }, .probe = su_probe, .remove = __devexit_p(su_remove), }; diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c index 2c7a66af4f52..f9a24f4ebb34 100644 --- a/drivers/serial/sunzilog.c +++ b/drivers/serial/sunzilog.c @@ -102,6 +102,8 @@ struct uart_sunzilog_port { #endif }; +static void sunzilog_putchar(struct uart_port *port, int ch); + #define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel __iomem *)((PORT)->membase)) #define UART_ZILOG(PORT) ((struct uart_sunzilog_port *)(PORT)) @@ -996,6 +998,50 @@ static int sunzilog_verify_port(struct uart_port *port, struct serial_struct *se return -EINVAL; } +#ifdef CONFIG_CONSOLE_POLL +static int sunzilog_get_poll_char(struct uart_port *port) +{ + unsigned char ch, r1; + struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; + struct zilog_channel __iomem *channel + = ZILOG_CHANNEL_FROM_PORT(&up->port); + + + r1 = read_zsreg(channel, R1); + if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { + writeb(ERR_RES, &channel->control); + ZSDELAY(); + ZS_WSYNC(channel); + } + + ch = readb(&channel->control); + ZSDELAY(); + + /* This funny hack depends upon BRK_ABRT not interfering + * with the other bits we care about in R1. + */ + if (ch & BRK_ABRT) + r1 |= BRK_ABRT; + + if (!(ch & Rx_CH_AV)) + return NO_POLL_CHAR; + + ch = readb(&channel->data); + ZSDELAY(); + + ch &= up->parity_mask; + return ch; +} + +static void sunzilog_put_poll_char(struct uart_port *port, + unsigned char ch) +{ + struct uart_sunzilog_port *up = (struct uart_sunzilog_port *)port; + + sunzilog_putchar(&up->port, ch); +} +#endif /* CONFIG_CONSOLE_POLL */ + static struct uart_ops sunzilog_pops = { .tx_empty = sunzilog_tx_empty, .set_mctrl = sunzilog_set_mctrl, @@ -1013,6 +1059,10 @@ static struct uart_ops sunzilog_pops = { .request_port = sunzilog_request_port, .config_port = sunzilog_config_port, .verify_port = sunzilog_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = sunzilog_get_poll_char, + .poll_put_char = sunzilog_put_poll_char, +#endif }; static int uart_chip_count; @@ -1180,7 +1230,7 @@ static int __init sunzilog_console_setup(struct console *con, char *options) (sunzilog_reg.minor - 64) + con->index, con->index); /* Get firmware console settings. */ - sunserial_console_termios(con, to_of_device(up->port.dev)->node); + sunserial_console_termios(con, to_of_device(up->port.dev)->dev.of_node); /* Firmware console speed is limited to 150-->38400 baud so * this hackish cflag thing is OK. @@ -1358,7 +1408,7 @@ static int __devinit zs_probe(struct of_device *op, const struct of_device_id *m int keyboard_mouse = 0; int err; - if (of_find_property(op->node, "keyboard", NULL)) + if (of_find_property(op->dev.of_node, "keyboard", NULL)) keyboard_mouse = 1; /* uarts must come before keyboards/mice */ @@ -1415,7 +1465,7 @@ static int __devinit zs_probe(struct of_device *op, const struct of_device_id *m sunzilog_init_hw(&up[1]); if (!keyboard_mouse) { - if (sunserial_console_match(SUNZILOG_CONSOLE(), op->node, + if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, &sunzilog_reg, up[0].port.line, false)) up->flags |= SUNZILOG_FLAG_IS_CONS; @@ -1425,7 +1475,7 @@ static int __devinit zs_probe(struct of_device *op, const struct of_device_id *m rp, sizeof(struct zilog_layout)); return err; } - if (sunserial_console_match(SUNZILOG_CONSOLE(), op->node, + if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, &sunzilog_reg, up[1].port.line, false)) up->flags |= SUNZILOG_FLAG_IS_CONS; @@ -1491,8 +1541,11 @@ static const struct of_device_id zs_match[] = { MODULE_DEVICE_TABLE(of, zs_match); static struct of_platform_driver zs_driver = { - .name = "zs", - .match_table = zs_match, + .driver = { + .name = "zs", + .owner = THIS_MODULE, + .of_match_table = zs_match, + }, .probe = zs_probe, .remove = __devexit_p(zs_remove), }; diff --git a/drivers/serial/timbuart.c b/drivers/serial/timbuart.c index 786ba85c170b..67ca642713b8 100644 --- a/drivers/serial/timbuart.c +++ b/drivers/serial/timbuart.c @@ -68,12 +68,22 @@ static void timbuart_start_tx(struct uart_port *port) tasklet_schedule(&uart->tasklet); } +static unsigned int timbuart_tx_empty(struct uart_port *port) +{ + u32 isr = ioread32(port->membase + TIMBUART_ISR); + + return (isr & TXBE) ? TIOCSER_TEMT : 0; +} + static void timbuart_flush_buffer(struct uart_port *port) { - u8 ctl = ioread8(port->membase + TIMBUART_CTRL) | TIMBUART_CTRL_FLSHTX; + if (!timbuart_tx_empty(port)) { + u8 ctl = ioread8(port->membase + TIMBUART_CTRL) | + TIMBUART_CTRL_FLSHTX; - iowrite8(ctl, port->membase + TIMBUART_CTRL); - iowrite32(TXBF, port->membase + TIMBUART_ISR); + iowrite8(ctl, port->membase + TIMBUART_CTRL); + iowrite32(TXBF, port->membase + TIMBUART_ISR); + } } static void timbuart_rx_chars(struct uart_port *port) @@ -195,13 +205,6 @@ void timbuart_tasklet(unsigned long arg) dev_dbg(uart->port.dev, "%s leaving\n", __func__); } -static unsigned int timbuart_tx_empty(struct uart_port *port) -{ - u32 isr = ioread32(port->membase + TIMBUART_ISR); - - return (isr & TXBE) ? TIOCSER_TEMT : 0; -} - static unsigned int timbuart_get_mctrl(struct uart_port *port) { u8 cts = ioread8(port->membase + TIMBUART_CTRL); @@ -220,7 +223,7 @@ static void timbuart_set_mctrl(struct uart_port *port, unsigned int mctrl) if (mctrl & TIOCM_RTS) iowrite8(TIMBUART_CTRL_RTS, port->membase + TIMBUART_CTRL); else - iowrite8(TIMBUART_CTRL_RTS, port->membase + TIMBUART_CTRL); + iowrite8(0, port->membase + TIMBUART_CTRL); } static void timbuart_mctrl_check(struct uart_port *port, u32 isr, u32 *ier) diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c index f0a6c61b17f7..8acccd564378 100644 --- a/drivers/serial/uartlite.c +++ b/drivers/serial/uartlite.c @@ -86,7 +86,7 @@ static int ulite_receive(struct uart_port *port, int stat) /* stats */ if (stat & ULITE_STATUS_RXVALID) { port->icount.rx++; - ch = readb(port->membase + ULITE_RX); + ch = ioread32be(port->membase + ULITE_RX); if (stat & ULITE_STATUS_PARITY) port->icount.parity++; @@ -131,7 +131,7 @@ static int ulite_transmit(struct uart_port *port, int stat) return 0; if (port->x_char) { - writeb(port->x_char, port->membase + ULITE_TX); + iowrite32be(port->x_char, port->membase + ULITE_TX); port->x_char = 0; port->icount.tx++; return 1; @@ -140,7 +140,7 @@ static int ulite_transmit(struct uart_port *port, int stat) if (uart_circ_empty(xmit) || uart_tx_stopped(port)) return 0; - writeb(xmit->buf[xmit->tail], port->membase + ULITE_TX); + iowrite32be(xmit->buf[xmit->tail], port->membase + ULITE_TX); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1); port->icount.tx++; @@ -157,7 +157,7 @@ static irqreturn_t ulite_isr(int irq, void *dev_id) int busy, n = 0; do { - int stat = readb(port->membase + ULITE_STATUS); + int stat = ioread32be(port->membase + ULITE_STATUS); busy = ulite_receive(port, stat); busy |= ulite_transmit(port, stat); n++; @@ -178,7 +178,7 @@ static unsigned int ulite_tx_empty(struct uart_port *port) unsigned int ret; spin_lock_irqsave(&port->lock, flags); - ret = readb(port->membase + ULITE_STATUS); + ret = ioread32be(port->membase + ULITE_STATUS); spin_unlock_irqrestore(&port->lock, flags); return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0; @@ -201,7 +201,7 @@ static void ulite_stop_tx(struct uart_port *port) static void ulite_start_tx(struct uart_port *port) { - ulite_transmit(port, readb(port->membase + ULITE_STATUS)); + ulite_transmit(port, ioread32be(port->membase + ULITE_STATUS)); } static void ulite_stop_rx(struct uart_port *port) @@ -230,17 +230,17 @@ static int ulite_startup(struct uart_port *port) if (ret) return ret; - writeb(ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX, + iowrite32be(ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX, port->membase + ULITE_CONTROL); - writeb(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL); + iowrite32be(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL); return 0; } static void ulite_shutdown(struct uart_port *port) { - writeb(0, port->membase + ULITE_CONTROL); - readb(port->membase + ULITE_CONTROL); /* dummy */ + iowrite32be(0, port->membase + ULITE_CONTROL); + ioread32be(port->membase + ULITE_CONTROL); /* dummy */ free_irq(port->irq, port); } @@ -352,7 +352,7 @@ static void ulite_console_wait_tx(struct uart_port *port) /* Spin waiting for TX fifo to have space available */ for (i = 0; i < 100000; i++) { - val = readb(port->membase + ULITE_STATUS); + val = ioread32be(port->membase + ULITE_STATUS); if ((val & ULITE_STATUS_TXFULL) == 0) break; cpu_relax(); @@ -362,7 +362,7 @@ static void ulite_console_wait_tx(struct uart_port *port) static void ulite_console_putchar(struct uart_port *port, int ch) { ulite_console_wait_tx(port); - writeb(ch, port->membase + ULITE_TX); + iowrite32be(ch, port->membase + ULITE_TX); } static void ulite_console_write(struct console *co, const char *s, @@ -379,8 +379,8 @@ static void ulite_console_write(struct console *co, const char *s, spin_lock_irqsave(&port->lock, flags); /* save and disable interrupt */ - ier = readb(port->membase + ULITE_STATUS) & ULITE_STATUS_IE; - writeb(0, port->membase + ULITE_CONTROL); + ier = ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_IE; + iowrite32be(0, port->membase + ULITE_CONTROL); uart_console_write(port, s, count, ulite_console_putchar); @@ -388,7 +388,7 @@ static void ulite_console_write(struct console *co, const char *s, /* restore interrupt state */ if (ier) - writeb(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL); + iowrite32be(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL); if (locked) spin_unlock_irqrestore(&port->lock, flags); @@ -591,17 +591,17 @@ ulite_of_probe(struct of_device *op, const struct of_device_id *match) dev_dbg(&op->dev, "%s(%p, %p)\n", __func__, op, match); - rc = of_address_to_resource(op->node, 0, &res); + rc = of_address_to_resource(op->dev.of_node, 0, &res); if (rc) { dev_err(&op->dev, "invalid address\n"); return rc; } - irq = irq_of_parse_and_map(op->node, 0); + irq = irq_of_parse_and_map(op->dev.of_node, 0); - id = of_get_property(op->node, "port-number", NULL); + id = of_get_property(op->dev.of_node, "port-number", NULL); - return ulite_assign(&op->dev, id ? *id : -1, res.start+3, irq); + return ulite_assign(&op->dev, id ? *id : -1, res.start, irq); } static int __devexit ulite_of_remove(struct of_device *op) @@ -610,13 +610,12 @@ static int __devexit ulite_of_remove(struct of_device *op) } static struct of_platform_driver ulite_of_driver = { - .owner = THIS_MODULE, - .name = "uartlite", - .match_table = ulite_of_match, .probe = ulite_of_probe, .remove = __devexit_p(ulite_of_remove), .driver = { .name = "uartlite", + .owner = THIS_MODULE, + .of_match_table = ulite_of_match, }, }; diff --git a/drivers/serial/ucc_uart.c b/drivers/serial/ucc_uart.c index 074904912f64..907b06f5c447 100644 --- a/drivers/serial/ucc_uart.c +++ b/drivers/serial/ucc_uart.c @@ -1197,7 +1197,7 @@ static void uart_firmware_cont(const struct firmware *fw, void *context) static int ucc_uart_probe(struct of_device *ofdev, const struct of_device_id *match) { - struct device_node *np = ofdev->node; + struct device_node *np = ofdev->dev.of_node; const unsigned int *iprop; /* Integer OF properties */ const char *sprop; /* String OF properties */ struct uart_qe_port *qe_port = NULL; @@ -1486,9 +1486,11 @@ static struct of_device_id ucc_uart_match[] = { MODULE_DEVICE_TABLE(of, ucc_uart_match); static struct of_platform_driver ucc_uart_of_driver = { - .owner = THIS_MODULE, - .name = "ucc_uart", - .match_table = ucc_uart_match, + .driver = { + .name = "ucc_uart", + .owner = THIS_MODULE, + .of_match_table = ucc_uart_match, + }, .probe = ucc_uart_probe, .remove = ucc_uart_remove, }; |