diff options
-rw-r--r-- | MAINTAINERS | 5 | ||||
-rw-r--r-- | drivers/tty/serial/Kconfig | 19 | ||||
-rw-r--r-- | drivers/tty/serial/Makefile | 1 | ||||
-rw-r--r-- | drivers/tty/serial/serial_cortina-access.c | 798 |
4 files changed, 0 insertions, 823 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index f20502df69b8..25d7d864cfbd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4680,11 +4680,6 @@ S: Maintained W: http://www.fi.muni.cz/~kas/cosa/ F: drivers/net/wan/cosa* -CORTINA-ACCESS SERIAL CONSOLE DRIVER -M: Jason Li <jason.li@cortina-access.com> -S: Supported -F: drivers/tty/serial/serial_cortina-access.c - COUNTER SUBSYSTEM M: William Breathitt Gray <vilhelm.gray@gmail.com> L: linux-iio@vger.kernel.org diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 2fa39cd78c56..24282ad99d85 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1561,25 +1561,6 @@ config SERIAL_LITEUART_CONSOLE and warnings and which allows logins in single user mode). Otherwise, say 'N'. -config SERIAL_CORTINA_ACCESS - tristate "Cortina-Access serial port support" - select SERIAL_CORE - help - This driver is for Cortina-Access SoC's UART. If you have a machine - based on the Cortina-Access SoC and wish to use the serial port, - say 'Y' here. Otherwise, say 'N'. - -config SERIAL_CORTINA_ACCESS_CONSOLE - bool "Console on Cortina-ACCESS serial port" - depends on SERIAL_CORTINA_ACCESS=y - select SERIAL_CORE_CONSOLE - select SERIAL_EARLYCON - help - Say 'Y' here if you wish to use Cortina-Access UART as the system - console. (the system console is the device which receives all kernel - messages and warnings and which allows logins in single user mode) - /dev/ttyS* is default device node. - endmenu config SERIAL_MCTRL_GPIO diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index f3f531a48854..7da0856cd198 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -87,7 +87,6 @@ obj-$(CONFIG_SERIAL_RDA) += rda-uart.o obj-$(CONFIG_SERIAL_MILBEAUT_USIO) += milbeaut_usio.o obj-$(CONFIG_SERIAL_SIFIVE) += sifive.o obj-$(CONFIG_SERIAL_LITEUART) += liteuart.o -obj-$(CONFIG_SERIAL_CORTINA_ACCESS) += serial_cortina-access.o # GPIOLIB helpers for modem control lines obj-$(CONFIG_SERIAL_MCTRL_GPIO) += serial_mctrl_gpio.o diff --git a/drivers/tty/serial/serial_cortina-access.c b/drivers/tty/serial/serial_cortina-access.c deleted file mode 100644 index b4b9362bb4e6..000000000000 --- a/drivers/tty/serial/serial_cortina-access.c +++ /dev/null @@ -1,798 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * UART driver for Cortina-Access Soc platform - * Copyright (C) 2021 Cortina-Access Inc. - */ -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/serial_core.h> -#include <linux/delay.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> - -/*************************************** - * UART Related registers - ****************************************/ -/* register definitions */ -#define CFG 0x00 -#define FC 0x04 -#define RX_SAMPLE 0x08 -#define RT_TUNE 0x0C -#define TX_DAT 0x10 -#define RX_DAT 0x14 -#define INFO 0x18 -#define IE 0x1C -#define INT 0x24 -#define STATUS 0x2C - -/* CFG */ -#define CFG_STOP_2BIT BIT(2) -#define CFG_PARITY_EVEN BIT(3) -#define CFG_PARITY_EN BIT(4) -#define CFG_TX_EN BIT(5) -#define CFG_RX_EN BIT(6) -#define CFG_UART_EN BIT(7) -#define CFG_BAUD_SART_SHIFT 8 - -/* INFO */ -#define INFO_TX_EMPTY BIT(3) -#define INFO_TX_FULL BIT(2) -#define INFO_RX_EMPTY BIT(1) -#define INFO_RX_FULL BIT(0) - -/* Interrupt */ -#define RX_BREAK BIT(7) -#define RX_FIFO_NONEMPTYE BIT(6) -#define TX_FIFO_EMPTYE BIT(5) -#define RX_FIFO_UNDERRUNE BIT(4) -#define RX_FIFO_OVERRUNE BIT(3) -#define RX_PARITY_ERRE BIT(2) -#define RX_STOP_ERRE BIT(1) -#define TX_FIFO_OVERRUNE BIT(0) - -#define TX_TIMEOUT 5000 -#define UART_NR 4 -#define CA_UART_NAME_LEN 32 -struct cortina_uart_port { - struct uart_port uart; - char name[CA_UART_NAME_LEN]; - char has_bi; - unsigned int may_wakeup; -}; - -static struct cortina_uart_port *cortina_uart_ports; - -static irqreturn_t cortina_uart_interrupt(int irq, void *dev_id); - -/* Return uart_port pointer base on index */ -struct cortina_uart_port *cortina_uart_get_port(unsigned int index) -{ - struct cortina_uart_port *pca_port = cortina_uart_ports; - - if (index >= UART_NR) { - /* return 1st element if invalid index */ - index = 0; - } - - pca_port += index; - - return pca_port; -} - -/* uart_ops functions */ -static unsigned int cortina_uart_tx_empty(struct uart_port *port) -{ - /* Return 0 on FIXO condition, TIOCSER_TEMT otherwise */ - return (readl(port->membase + INFO) & INFO_TX_EMPTY) ? TIOCSER_TEMT : 0; -} - -static void cortina_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -/* - * Even if we do not support configuring the modem control lines, this - * function must be proided to the serial core. - * port->ops->set_mctrl() be called in uart_configure_port() - */ -} - -static unsigned int cortina_uart_get_mctrl(struct uart_port *port) -{ - /* Unimplemented signals asserted, per Documentation/serial/driver */ - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; -} - -static void cortina_uart_stop_tx(struct uart_port *port) -{ - /* Turn off Tx interrupts. The port lock is held at this point */ - unsigned int reg_v; - - reg_v = readl(port->membase + IE); - writel(reg_v & ~TX_FIFO_EMPTYE, port->membase + IE); -} - -static inline void cortina_transmit_buffer(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - cortina_uart_stop_tx(port); - return; - } - - do { - /* send xmit->buf[xmit->tail] out the port here */ - writel(xmit->buf[xmit->tail], port->membase + TX_DAT); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if ((readl(port->membase + INFO) & INFO_TX_FULL)) - break; - } while (!uart_circ_empty(xmit)); - - if (uart_circ_empty(xmit)) - cortina_uart_stop_tx(port); -} - -static void cortina_uart_start_tx(struct uart_port *port) -{ - /* Turn on Tx interrupts. The port lock is held at this point */ - unsigned int reg_v; - - reg_v = readl(port->membase + IE); - writel((reg_v | TX_FIFO_EMPTYE), port->membase + IE); - - reg_v = readl(port->membase + CFG); - writel(reg_v | CFG_TX_EN, port->membase + CFG); - - if (readl(port->membase + INFO) & INFO_TX_EMPTY) - cortina_transmit_buffer(port); -} - -static void cortina_uart_stop_rx(struct uart_port *port) -{ - /* Turn off Rx interrupts. The port lock is held at this point */ - unsigned int reg_v; - - reg_v = readl(port->membase + IE); - writel(reg_v & ~RX_FIFO_NONEMPTYE, port->membase + IE); -} - -static void cortina_uart_enable_ms(struct uart_port *port) -{ - /* Nope, you really can't hope to attach a modem to this */ -} - -static int cortina_uart_startup(struct uart_port *port) -{ - unsigned int reg_v; - int retval; - unsigned long flags; - - /* Disable interrupt */ - writel(0, port->membase + IE); - - retval = - request_irq(port->irq, cortina_uart_interrupt, 0, "cortina_uart", - port); - if (retval) - return retval; - - spin_lock_irqsave(&port->lock, flags); - - reg_v = readl(port->membase + CFG); - reg_v |= (CFG_UART_EN | CFG_TX_EN | CFG_RX_EN | 0x3 /* 8-bits data */); - writel(reg_v, port->membase + CFG); - reg_v = readl(port->membase + IE); - writel(reg_v | RX_FIFO_NONEMPTYE | TX_FIFO_EMPTYE, port->membase + IE); - - spin_unlock_irqrestore(&port->lock, flags); - return 0; -} - -static void cortina_uart_shutdown(struct uart_port *port) -{ - cortina_uart_stop_tx(port); - cortina_uart_stop_rx(port); - free_irq(port->irq, port); -} - -static void cortina_uart_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - unsigned long flags; - int baud; - unsigned int reg_v, sample_freq = 0; - - baud = uart_get_baud_rate(port, termios, old, 0, 230400); - reg_v = readl(port->membase + CFG); - /* mask off the baud settings */ - reg_v &= 0xff; - reg_v |= (port->uartclk / baud) << CFG_BAUD_SART_SHIFT; - - /* Sampling rate should be half of baud count */ - sample_freq = (reg_v >> CFG_BAUD_SART_SHIFT) / 2; - - /* See include/uapi/asm-generic/termbits.h for CSIZE definition */ - /* mask off the data width */ - reg_v &= 0xfffffffc; - switch (termios->c_cflag & CSIZE) { - case CS5: - reg_v |= 0x0; - break; - case CS6: - reg_v |= 0x1; - break; - case CS7: - reg_v |= 0x2; - break; - case CS8: - default: - reg_v |= 0x3; - break; - } - - /* mask off Stop bits */ - reg_v &= ~(CFG_STOP_2BIT); - if (termios->c_cflag & CSTOPB) - reg_v |= CFG_STOP_2BIT; - - /* Parity */ - reg_v &= ~(CFG_PARITY_EN); - reg_v |= CFG_PARITY_EVEN; - if (termios->c_cflag & PARENB) { - reg_v |= CFG_PARITY_EN; - if (termios->c_cflag & PARODD) - reg_v &= ~(CFG_PARITY_EVEN); - } - - spin_lock_irqsave(&port->lock, flags); - writel(reg_v, port->membase + CFG); - writel(sample_freq, port->membase + RX_SAMPLE); - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *cortina_uart_type(struct uart_port *port) -{ - return container_of(port, struct cortina_uart_port, uart)->name; -} - -static void cortina_uart_config_port(struct uart_port *port, int flags) -{ - /* - * Driver core for serial ports forces a non-zero value for port type. - * Write an arbitrary value here to accommodate the serial core driver, - * as ID part of UAPI is redundant. - */ - port->type = 1; -} - -static int cortina_uart_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - if (ser->type != PORT_UNKNOWN && ser->type != 1) - return -EINVAL; - return 0; -} - -static void cortina_access_power(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - unsigned int reg_v; - - /* Read Config register */ - reg_v = readl(port->membase + CFG); - switch (state) { - case UART_PM_STATE_ON: - reg_v |= CFG_UART_EN; - break; - case UART_PM_STATE_OFF: - reg_v &= ~CFG_UART_EN; - break; - default: - pr_err("cortina-access serial: Unknown PM state %d\n", state); - } - writel(reg_v, port->membase + CFG); -} - -#ifdef CONFIG_CONSOLE_POLL -static int cortina_poll_get_char(struct uart_port *port) -{ - unsigned int rx; - - if (readl(port->membase + INFO) & INFO_RX_EMPTY) - return NO_POLL_CHAR; - - rx = readl(port->membase + RX_DAT); - - return rx; -} - -static void cortina_poll_put_char(struct uart_port *port, unsigned char c) -{ - unsigned long time_out; - - time_out = jiffies + usecs_to_jiffies(TX_TIMEOUT); - - while (time_before(jiffies, time_out) && - (readl(port->membase + INFO) & INFO_TX_FULL)) - cpu_relax(); - - /* Give up if FIFO stuck! */ - if ((readl(port->membase + INFO) & INFO_TX_FULL)) - return; - - writel(c, port->membase + TX_DAT); -} - -#endif - -static const struct uart_ops cortina_uart_ops = { - .tx_empty = cortina_uart_tx_empty, - .set_mctrl = cortina_uart_set_mctrl, - .get_mctrl = cortina_uart_get_mctrl, - .stop_tx = cortina_uart_stop_tx, - .start_tx = cortina_uart_start_tx, - .stop_rx = cortina_uart_stop_rx, - .enable_ms = cortina_uart_enable_ms, - .startup = cortina_uart_startup, - .shutdown = cortina_uart_shutdown, - .set_termios = cortina_uart_set_termios, - .type = cortina_uart_type, - .config_port = cortina_uart_config_port, - .verify_port = cortina_uart_verify_port, - .pm = cortina_access_power, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = cortina_poll_get_char, - .poll_put_char = cortina_poll_put_char, -#endif -}; - -static inline void cortina_uart_interrupt_rx_chars(struct uart_port *port, - unsigned long status) -{ - struct tty_port *ttyport = &port->state->port; - unsigned int ch; - unsigned int rx, flg; - struct cortina_uart_port *pca_port; - - rx = readl(port->membase + INFO); - if (INFO_RX_EMPTY & rx) - return; - - if (status & RX_FIFO_OVERRUNE) - port->icount.overrun++; - - pca_port = cortina_uart_get_port(port->line); - - /* Read the character while FIFO is not empty */ - do { - flg = TTY_NORMAL; - port->icount.rx++; - ch = readl(port->membase + RX_DAT); - if (status & RX_PARITY_ERRE) { - port->icount.parity++; - flg = TTY_PARITY; - } - - if (pca_port->has_bi) { - /* If BI supported ? */ - if (status & RX_BREAK) { - port->icount.brk++; - if (uart_handle_break(port)) - goto ignore; - } - } else { - /* Treat stop err as BI */ - if (status & RX_STOP_ERRE) { - port->icount.brk++; - if (uart_handle_break(port)) - goto ignore; - } - } - if (!(ch & 0x100)) /* RX char is not valid */ - goto ignore; - - if (uart_handle_sysrq_char(port, (unsigned char)ch)) - goto ignore; - - tty_insert_flip_char(ttyport, ch, flg); - ignore: - rx = readl(port->membase + INFO); - } while (!(INFO_RX_EMPTY & rx)); - - spin_unlock(&port->lock); - tty_flip_buffer_push(ttyport); - spin_lock(&port->lock); -} - -static inline void cortina_uart_interrupt_tx_chars(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - /* Process out of band chars */ - if (port->x_char) { - /* Send next char */ - writel(port->x_char, port->membase + TX_DAT); - goto done; - } - - /* Nothing to do ? */ - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - cortina_uart_stop_tx(port); - goto done; - } - - cortina_transmit_buffer(port); - - /* Wake up */ - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - /* Maybe we're done after all */ - if (uart_circ_empty(xmit)) - cortina_uart_stop_tx(port); - - done: - return; -} - -irqreturn_t cortina_uart_interrupt(int irq, void *dev_id) -{ - struct uart_port *port = (struct uart_port *)dev_id; - unsigned int irq_status; - - spin_lock(&port->lock); - - /* Clear interrupt! */ - irq_status = readl(port->membase + INT); - writel(irq_status, port->membase + INT); - - /* Process any Rx chars first */ - cortina_uart_interrupt_rx_chars(port, irq_status); - /* Then use any Tx space */ - cortina_uart_interrupt_tx_chars(port); - - spin_unlock(&port->lock); - - return IRQ_HANDLED; -} - -#ifdef CONFIG_SERIAL_CORTINA_ACCESS_CONSOLE -void cortina_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_port *port; - struct cortina_uart_port *pca_port; - unsigned int i, previous; - unsigned long flags; - int locked; - - pca_port = cortina_uart_get_port(co->index); - port = &pca_port->uart; - - local_irq_save(flags); - if (port->sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&port->lock); - } else { - spin_lock(&port->lock); - locked = 1; - } - - /* Save current state */ - previous = readl(port->membase + IE); - /* Disable Tx interrupts so this all goes out in one go */ - cortina_uart_stop_tx(port); - - /* Write all the chars */ - for (i = 0; i < count; i++) { - /* Wait the TX buffer to be empty, which can't take forever */ - while (!(readl(port->membase + INFO) & INFO_TX_EMPTY)) - cpu_relax(); - - /* Send the char */ - writel(*s, port->membase + TX_DAT); - - /* CR/LF stuff */ - if (*s++ == '\n') { - /* Wait the TX buffer to be empty */ - while (!(readl(port->membase + INFO) & INFO_TX_EMPTY)) - cpu_relax(); - writel('\r', port->membase + TX_DAT); - } - } - - writel(previous, port->membase + IE); /* Put it all back */ - - if (locked) - spin_unlock(&port->lock); - local_irq_restore(flags); -} - -static int __init cortina_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - struct cortina_uart_port *pca_port; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (co->index < 0 || co->index >= UART_NR) - return -ENODEV; - - pca_port = cortina_uart_get_port(co->index); - port = &pca_port->uart; - - /* This isn't going to do much, but it might change the baud rate. */ - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver cortina_uart_driver; - -static struct console cortina_console = { - .name = "ttyS", - .write = cortina_console_write, - .device = uart_console_device, - .setup = cortina_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, /* Only possible option. */ - .data = &cortina_uart_driver, -}; -#define CORTINA_CONSOLE (&cortina_console) - -/* Support EARLYCON */ -static void cortina_putc(struct uart_port *port, int c) -{ - unsigned int tmout; - - /* No jiffie at early boot stage! - * Wait up to 5ms for the character to be sent. - */ - tmout = TX_TIMEOUT; - while (--tmout) { - if (!(readl(port->membase + INFO) & INFO_TX_FULL)) - break; - udelay(1); - } - - /* Give up if FIFO stuck! */ - while ((readl(port->membase + INFO) & INFO_TX_FULL)) - return; - - /* Send the char */ - writel(c, port->membase + TX_DAT); -} - -static void cortina_early_write(struct console *con, const char *s, - unsigned int n) -{ - struct earlycon_device *dev = con->data; - - uart_console_write(&dev->port, s, n, cortina_putc); -} - -static int __init cortina_early_console_setup(struct earlycon_device *device, - const char *opt) -{ - if (!device->port.membase) - return -ENODEV; - - device->con->write = cortina_early_write; - return 0; -} - -EARLYCON_DECLARE(serial, cortina_early_console_setup); -OF_EARLYCON_DECLARE(serial, "cortina-access,serial", cortina_early_console_setup); -#else -#define CORTINA_CONSOLE NULL -#endif - -static struct uart_driver cortina_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "cortina-access_uart", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = UART_NR, - .cons = CORTINA_CONSOLE, -}; - -/* Match table for of_platform binding */ -static const struct of_device_id cortina_uart_of_match[] = { - {.compatible = "cortina-access,serial",}, - {} -}; -MODULE_DEVICE_TABLE(of, cortina_uart_of_match); - -static int serial_cortina_probe(struct platform_device *pdev) -{ - int ret; - void __iomem *base; - struct cortina_uart_port *port; - const struct of_device_id *match; - - /* assign DT node pointer */ - struct device_node *np = pdev->dev.of_node; - struct resource mem_resource; - u32 of_clock_frequency; - struct clk *pclk_info; - int uart_idx; - - /* search DT for a match */ - match = of_match_device(cortina_uart_of_match, &pdev->dev); - if (!match) - return -EINVAL; - - if (cortina_uart_ports == NULL) - cortina_uart_ports = kzalloc(UART_NR * sizeof(struct cortina_uart_port), - GFP_KERNEL); - - port = cortina_uart_ports; - for (uart_idx = 0; uart_idx < UART_NR; ++uart_idx) { - /* Find first empty slot */ - if (strlen(port->name) == 0) - break; - port++; - } - - if (uart_idx >= UART_NR) - return -EINVAL; - - snprintf(port->name, sizeof(port->name), "Cortina-Access UART%d", uart_idx); - - /* Retrieve HW base address */ - ret = of_address_to_resource(np, 0, &mem_resource); - if (ret) { - dev_warn(&pdev->dev, "invalid address %d\n", ret); - return ret; - } - - base = devm_ioremap(&pdev->dev, mem_resource.start, - resource_size(&mem_resource)); - if (!base) { - devm_kfree(&pdev->dev, port); - return -ENOMEM; - } - - /* assign reg base and irq from DT */ - port->uart.irq = irq_of_parse_and_map(np, 0); - port->uart.membase = base; - port->uart.mapbase = mem_resource.start; - port->uart.ops = &cortina_uart_ops; - port->uart.dev = &pdev->dev; - port->uart.line = uart_idx; - port->uart.has_sysrq = IS_ENABLED(CONFIG_SERIAL_CORTINA_ACCESS_CONSOLE); - - /* get clock-freqency tuple from DT and store value */ - if (of_property_read_u32(np, "clock-frequency", &of_clock_frequency)) { - /* If we are here, it means DT node did not contain - * clock-frequency tuple. Therefore, instead try to get - * clk rate through the clk driver that DT has stated - * we are consuming. - */ - pclk_info = clk_get(&pdev->dev, NULL); - if (IS_ERR(pclk_info)) { - dev_warn(&pdev->dev, - "clk or clock-frequency not defined\n"); - return PTR_ERR(pclk_info); - } - - clk_prepare_enable(pclk_info); - of_clock_frequency = clk_get_rate(pclk_info); - } - port->uart.uartclk = of_clock_frequency; - - if (of_property_read_bool(np, "wakeup-source")) - port->may_wakeup = true; - if (of_property_read_bool(np, "break-indicator")) - port->has_bi = true; - - port->uart.type = PORT_UNKNOWN; - - if (port->may_wakeup) - device_init_wakeup(&pdev->dev, true); - - ret = uart_add_one_port(&cortina_uart_driver, &port->uart); - if (ret) - return ret; - - platform_set_drvdata(pdev, port); - - return 0; -} - -static int serial_cortina_remove(struct platform_device *pdev) -{ - struct uart_port *port = platform_get_drvdata(pdev); - struct cortina_uart_port *pca_port; - - if (port) { - pca_port = cortina_uart_get_port(port->line); - memset(pca_port->name, 0, CA_UART_NAME_LEN); - uart_remove_one_port(&cortina_uart_driver, port); - } - - platform_set_drvdata(pdev, NULL); - return 0; -} - -#ifdef CONFIG_PM -static int serial_cortina_suspend(struct platform_device *pdev, - pm_message_t state) -{ - struct cortina_uart_port *p = - (struct cortina_uart_port *)pdev->dev.driver_data; - - uart_suspend_port(&cortina_uart_driver, &p->uart); - - return 0; -} - -static int serial_cortina_resume(struct platform_device *pdev) -{ - struct cortina_uart_port *p = - (struct cortina_uart_port *)pdev->dev.driver_data; - - uart_resume_port(&cortina_uart_driver, &p->uart); - - return 0; -} -#else -#define serial_cortina_suspend NULL -#define serial_cortina_resume NULL -#endif - -static struct platform_driver serial_cortina_driver = { - .probe = serial_cortina_probe, - .remove = serial_cortina_remove, -#ifdef CONFIG_PM - .suspend = serial_cortina_suspend, - .resume = serial_cortina_resume, -#endif - .driver = { - .name = "cortina-access_serial", - .owner = THIS_MODULE, - .of_match_table = cortina_uart_of_match, - }, -}; - -static int __init cortina_uart_init(void) -{ - int ret; - - ret = uart_register_driver(&cortina_uart_driver); - if (ret) - return ret; - - ret = platform_driver_register(&serial_cortina_driver); - if (ret) - uart_unregister_driver(&cortina_uart_driver); - - return ret; -} - -static void __exit cortina_uart_exit(void) -{ - platform_driver_unregister(&serial_cortina_driver); - uart_unregister_driver(&cortina_uart_driver); -} - -module_init(cortina_uart_init); -module_exit(cortina_uart_exit); - -MODULE_AUTHOR("Cortina-Access Inc."); -MODULE_DESCRIPTION(" Cortina-Access UART driver"); -MODULE_LICENSE("GPL"); |