X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fserial%2Fimx.c;h=d202eb4f3848f0cade4b4b2ed841f34f76703241;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=01a8726a3f97289b9a85e21eeab51c1703aaac8d;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 01a8726a3..d202eb4f3 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -36,7 +36,7 @@ #include #include #include -#include +#include #include #include #include @@ -45,6 +45,7 @@ #include #include #include +#include /* We've been assigned a range on the "Low-density serial ports" major */ #define SERIAL_IMX_MAJOR 204 @@ -73,7 +74,8 @@ struct imx_port { struct uart_port port; struct timer_list timer; unsigned int old_status; - int txirq,rxirq; + int txirq,rxirq,rtsirq; + int have_rtscts:1; }; /* @@ -124,7 +126,7 @@ static void imx_timeout(unsigned long data) /* * interrupts disabled on entry */ -static void imx_stop_tx(struct uart_port *port, unsigned int tty_stop) +static void imx_stop_tx(struct uart_port *port) { struct imx_port *sport = (struct imx_port *)port; UCR1((u32)sport->port.membase) &= ~UCR1_TXMPTYEN; @@ -165,13 +167,13 @@ static inline void imx_transmit_buffer(struct imx_port *sport) } while (!(UTS((u32)sport->port.membase) & UTS_TXFULL)); if (uart_circ_empty(xmit)) - imx_stop_tx(&sport->port, 0); + imx_stop_tx(&sport->port); } /* * interrupts disabled on entry */ -static void imx_start_tx(struct uart_port *port, unsigned int tty_start) +static void imx_start_tx(struct uart_port *port) { struct imx_port *sport = (struct imx_port *)port; @@ -181,6 +183,22 @@ static void imx_start_tx(struct uart_port *port, unsigned int tty_start) 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; @@ -196,7 +214,7 @@ static irqreturn_t imx_txint(int irq, void *dev_id, struct pt_regs *regs) } if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) { - imx_stop_tx(&sport->port, 0); + imx_stop_tx(&sport->port); goto out; } @@ -240,9 +258,6 @@ static irqreturn_t imx_rxint(int irq, void *dev_id, struct pt_regs *regs) error_return: tty_insert_flip_char(tty, rx, flg); - if (tty->flip.count >= TTY_FLIPBUF_SIZE) - goto out; - ignore_char: rx = URXD0((u32)sport->port.membase); } while(rx & URXD_CHARRDY); @@ -291,13 +306,31 @@ static unsigned int imx_tx_empty(struct uart_port *port) return USR2((u32)sport->port.membase) & USR2_TXDC ? TIOCSER_TEMT : 0; } +/* + * We have a modem side uart, so the meanings of RTS and CTS are inverted. + */ static unsigned int imx_get_mctrl(struct uart_port *port) { - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; + struct imx_port *sport = (struct imx_port *)port; + unsigned int tmp = TIOCM_DSR | TIOCM_CAR; + + if (USR1((u32)sport->port.membase) & USR1_RTSS) + tmp |= TIOCM_CTS; + + if (UCR2((u32)sport->port.membase) & UCR2_CTS) + tmp |= TIOCM_RTS; + + return tmp; } static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl) { + struct imx_port *sport = (struct imx_port *)port; + + if (mctrl & TIOCM_RTS) + UCR2((u32)sport->port.membase) |= UCR2_CTS; + else + UCR2((u32)sport->port.membase) &= ~UCR2_CTS; } /* @@ -365,18 +398,24 @@ 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, + SA_TRIGGER_FALLING | SA_TRIGGER_RISING, + DRIVER_NAME, sport); + if (retval) goto error_out3; /* * 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); /* @@ -388,10 +427,11 @@ 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; } @@ -407,6 +447,7 @@ 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); @@ -415,7 +456,7 @@ 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 @@ -452,15 +493,19 @@ imx_set_termios(struct uart_port *port, struct termios *termios, ucr2 = UCR2_SRST | UCR2_IRTS; if (termios->c_cflag & CRTSCTS) { - ucr2 &= ~UCR2_IRTS; - ucr2 |= UCR2_CTSC; + if( sport->have_rtscts ) { + ucr2 &= ~UCR2_IRTS; + ucr2 |= UCR2_CTSC; + } else { + termios->c_cflag &= ~CRTSCTS; + } } if (termios->c_cflag & CSTOPB) ucr2 |= UCR2_STPB; if (termios->c_cflag & PARENB) { ucr2 |= UCR2_PREN; - if (!(termios->c_cflag & PARODD)) + if (termios->c_cflag & PARODD) ucr2 |= UCR2_PROE; } @@ -505,7 +550,7 @@ 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(); @@ -626,30 +671,32 @@ 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, + .iotype = UPIO_MEM, .membase = (void *)IMX_UART1_BASE, .mapbase = IMX_UART1_BASE, /* FIXME */ .irq = UART1_MINT_RX, .uartclk = 16000000, .fifosize = 8, - .flags = ASYNC_BOOT_AUTOCONF, + .flags = UPF_BOOT_AUTOCONF, .ops = &imx_pops, .line = 0, }, }, { .txirq = UART2_MINT_TX, .rxirq = UART2_MINT_RX, + .rtsirq = UART2_MINT_RTS, .port = { .type = PORT_IMX, - .iotype = SERIAL_IO_MEM, + .iotype = UPIO_MEM, .membase = (void *)IMX_UART2_BASE, .mapbase = IMX_UART2_BASE, /* FIXME */ .irq = UART2_MINT_RX, .uartclk = 16000000, .fifosize = 8, - .flags = ASYNC_BOOT_AUTOCONF, + .flags = UPF_BOOT_AUTOCONF, .ops = &imx_pops, .line = 1, }, @@ -678,30 +725,16 @@ static void __init imx_init_ports(void) imx_ports[i].timer.function = imx_timeout; imx_ports[i].timer.data = (unsigned long)&imx_ports[i]; } - - imx_gpio_mode(PC9_PF_UART1_CTS); - imx_gpio_mode(PC10_PF_UART1_RTS); - imx_gpio_mode(PC11_PF_UART1_TXD); - imx_gpio_mode(PC12_PF_UART1_RXD); - imx_gpio_mode(PB28_PF_UART2_CTS); - imx_gpio_mode(PB29_PF_UART2_RTS); - - imx_gpio_mode(PB30_PF_UART2_TXD); - imx_gpio_mode(PB31_PF_UART2_RXD); - -#if 0 /* We don't need these, on the mx1 the _modem_ side of the uart - * is implemented. - */ - imx_gpio_mode(PD7_AF_UART2_DTR); - imx_gpio_mode(PD8_AF_UART2_DCD); - imx_gpio_mode(PD9_AF_UART2_RI); - imx_gpio_mode(PD10_AF_UART2_DSR); -#endif - - } #ifdef CONFIG_SERIAL_IMX_CONSOLE +static void imx_console_putchar(struct uart_port *port, int ch) +{ + struct imx_port *sport = (struct imx_port *)port; + while ((UTS((u32)sport->port.membase) & UTS_TXFULL)) + barrier(); + URTX0((u32)sport->port.membase) = ch; +} /* * Interrupts are disabled on entering @@ -710,7 +743,7 @@ static void imx_console_write(struct console *co, const char *s, unsigned int count) { struct imx_port *sport = &imx_ports[co->index]; - unsigned int old_ucr1, old_ucr2, i; + unsigned int old_ucr1, old_ucr2; /* * First, save UCR1/2 and then disable interrupts @@ -720,25 +753,10 @@ 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; - /* - * Now, do each character - */ - for (i = 0; i < count; i++) { - - while ((UTS((u32)sport->port.membase) & UTS_TXFULL)) - barrier(); - - URTX0((u32)sport->port.membase) = s[i]; - - if (s[i] == '\n') { - while ((UTS((u32)sport->port.membase) & UTS_TXFULL)) - barrier(); - URTX0((u32)sport->port.membase) = '\r'; - } - } + uart_console_write(&sport->port, s, count, imx_console_putchar); /* * Finally, wait for transmitter to become empty @@ -842,7 +860,7 @@ 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, @@ -877,41 +895,46 @@ 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); + struct imxuart_platform_data *pdata; + + imx_ports[dev->id].port.dev = &dev->dev; + + pdata = (struct imxuart_platform_data *)dev->dev.platform_data; + if(pdata && (pdata->flags & IMXUART_HAVE_RTSCTS)) + imx_ports[dev->id].have_rtscts = 1; - imx_ports[dev->id].port.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); @@ -919,14 +942,15 @@ 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) @@ -941,7 +965,7 @@ 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); @@ -951,6 +975,7 @@ 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);