diff options
Diffstat (limited to 'drivers/serial/imx.c')
-rw-r--r-- | drivers/serial/imx.c | 88 |
1 files changed, 57 insertions, 31 deletions
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 4c985e6b378..83c4c121658 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -36,7 +36,7 @@ #include <linux/init.h> #include <linux/console.h> #include <linux/sysrq.h> -#include <linux/device.h> +#include <linux/platform_device.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial_core.h> @@ -73,7 +73,7 @@ struct imx_port { struct uart_port port; struct timer_list timer; unsigned int old_status; - int txirq,rxirq; + int txirq,rxirq,rtsirq; }; /* @@ -181,6 +181,22 @@ static void imx_start_tx(struct uart_port *port) imx_transmit_buffer(sport); } +static irqreturn_t imx_rtsint(int irq, void *dev_id, struct pt_regs *regs) +{ + struct imx_port *sport = (struct imx_port *)dev_id; + unsigned int val = USR1((u32)sport->port.membase)&USR1_RTSS; + unsigned long flags; + + spin_lock_irqsave(&sport->port.lock, flags); + + USR1((u32)sport->port.membase) = USR1_RTSD; + uart_handle_cts_change(&sport->port, !!val); + wake_up_interruptible(&sport->port.info->delta_msr_wait); + + spin_unlock_irqrestore(&sport->port.lock, flags); + return IRQ_HANDLED; +} + static irqreturn_t imx_txint(int irq, void *dev_id, struct pt_regs *regs) { struct imx_port *sport = (struct imx_port *)dev_id; @@ -383,18 +399,24 @@ static int imx_startup(struct uart_port *port) */ retval = request_irq(sport->rxirq, imx_rxint, 0, DRIVER_NAME, sport); - if (retval) goto error_out2; + if (retval) goto error_out1; retval = request_irq(sport->txirq, imx_txint, 0, - "imx-uart", sport); - if (retval) goto error_out1; + DRIVER_NAME, sport); + if (retval) goto error_out2; + + retval = request_irq(sport->rtsirq, imx_rtsint, 0, + DRIVER_NAME, sport); + if (retval) goto error_out3; + set_irq_type(sport->rtsirq, IRQT_BOTHEDGE); /* * Finally, clear and enable interrupts */ + USR1((u32)sport->port.membase) = USR1_RTSD; UCR1((u32)sport->port.membase) |= - (UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_UARTEN); + (UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN); UCR2((u32)sport->port.membase) |= (UCR2_RXEN | UCR2_TXEN); /* @@ -406,10 +428,11 @@ static int imx_startup(struct uart_port *port) return 0; -error_out1: - free_irq(sport->rxirq, sport); -error_out2: +error_out3: free_irq(sport->txirq, sport); +error_out2: + free_irq(sport->rxirq, sport); +error_out1: return retval; } @@ -425,6 +448,7 @@ static void imx_shutdown(struct uart_port *port) /* * Free the interrupts */ + free_irq(sport->rtsirq, sport); free_irq(sport->txirq, sport); free_irq(sport->rxirq, sport); @@ -433,7 +457,7 @@ static void imx_shutdown(struct uart_port *port) */ UCR1((u32)sport->port.membase) &= - ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_UARTEN); + ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN); } static void @@ -523,7 +547,7 @@ imx_set_termios(struct uart_port *port, struct termios *termios, * disable interrupts and drain transmitter */ old_ucr1 = UCR1((u32)sport->port.membase); - UCR1((u32)sport->port.membase) &= ~(UCR1_TXMPTYEN | UCR1_RRDYEN); + UCR1((u32)sport->port.membase) &= ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN); while ( !(USR2((u32)sport->port.membase) & USR2_TXDC)) barrier(); @@ -644,6 +668,7 @@ static struct imx_port imx_ports[] = { { .txirq = UART1_MINT_TX, .rxirq = UART1_MINT_RX, + .rtsirq = UART1_MINT_RTS, .port = { .type = PORT_IMX, .iotype = SERIAL_IO_MEM, @@ -659,6 +684,7 @@ static struct imx_port imx_ports[] = { }, { .txirq = UART2_MINT_TX, .rxirq = UART2_MINT_RX, + .rtsirq = UART2_MINT_RTS, .port = { .type = PORT_IMX, .iotype = SERIAL_IO_MEM, @@ -738,7 +764,7 @@ imx_console_write(struct console *co, const char *s, unsigned int count) UCR1((u32)sport->port.membase) = (old_ucr1 | UCR1_UARTCLKEN | UCR1_UARTEN) - & ~(UCR1_TXMPTYEN | UCR1_RRDYEN); + & ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN); UCR2((u32)sport->port.membase) = old_ucr2 | UCR2_TXEN; /* @@ -860,7 +886,7 @@ imx_console_setup(struct console *co, char *options) return uart_set_options(&sport->port, co, baud, parity, bits, flow); } -extern struct uart_driver imx_reg; +static struct uart_driver imx_reg; static struct console imx_console = { .name = "ttySMX", .write = imx_console_write, @@ -895,41 +921,39 @@ static struct uart_driver imx_reg = { .cons = IMX_CONSOLE, }; -static int serial_imx_suspend(struct device *_dev, pm_message_t state, u32 level) +static int serial_imx_suspend(struct platform_device *dev, pm_message_t state) { - struct imx_port *sport = dev_get_drvdata(_dev); + struct imx_port *sport = platform_get_drvdata(dev); - if (sport && level == SUSPEND_DISABLE) + if (sport) uart_suspend_port(&imx_reg, &sport->port); return 0; } -static int serial_imx_resume(struct device *_dev, u32 level) +static int serial_imx_resume(struct platform_device *dev) { - struct imx_port *sport = dev_get_drvdata(_dev); + struct imx_port *sport = platform_get_drvdata(dev); - if (sport && level == RESUME_ENABLE) + if (sport) uart_resume_port(&imx_reg, &sport->port); return 0; } -static int serial_imx_probe(struct device *_dev) +static int serial_imx_probe(struct platform_device *dev) { - struct platform_device *dev = to_platform_device(_dev); - - imx_ports[dev->id].port.dev = _dev; + imx_ports[dev->id].port.dev = &dev->dev; uart_add_one_port(&imx_reg, &imx_ports[dev->id].port); - dev_set_drvdata(_dev, &imx_ports[dev->id]); + platform_set_drvdata(dev, &imx_ports[dev->id]); return 0; } -static int serial_imx_remove(struct device *_dev) +static int serial_imx_remove(struct platform_device *dev) { - struct imx_port *sport = dev_get_drvdata(_dev); + struct imx_port *sport = platform_get_drvdata(dev); - dev_set_drvdata(_dev, NULL); + platform_set_drvdata(dev, NULL); if (sport) uart_remove_one_port(&imx_reg, &sport->port); @@ -937,14 +961,15 @@ static int serial_imx_remove(struct device *_dev) return 0; } -static struct device_driver serial_imx_driver = { - .name = "imx-uart", - .bus = &platform_bus_type, +static struct platform_driver serial_imx_driver = { .probe = serial_imx_probe, .remove = serial_imx_remove, .suspend = serial_imx_suspend, .resume = serial_imx_resume, + .driver = { + .name = "imx-uart", + }, }; static int __init imx_serial_init(void) @@ -959,7 +984,7 @@ static int __init imx_serial_init(void) if (ret) return ret; - ret = driver_register(&serial_imx_driver); + ret = platform_driver_register(&serial_imx_driver); if (ret != 0) uart_unregister_driver(&imx_reg); @@ -969,6 +994,7 @@ static int __init imx_serial_init(void) static void __exit imx_serial_exit(void) { uart_unregister_driver(&imx_reg); + platform_driver_unregister(&serial_imx_driver); } module_init(imx_serial_init); |