diff options
Diffstat (limited to 'drivers/serial/at91_serial.c')
| -rw-r--r-- | drivers/serial/at91_serial.c | 467 |
1 files changed, 281 insertions, 186 deletions
diff --git a/drivers/serial/at91_serial.c b/drivers/serial/at91_serial.c index 6547fe0cef9..a7d664383da 100644 --- a/drivers/serial/at91_serial.c +++ b/drivers/serial/at91_serial.c @@ -2,7 +2,6 @@ * linux/drivers/char/at91_serial.c * * Driver for Atmel AT91RM9200 Serial ports - * * Copyright (C) 2003 Rick Bronson * * Based on drivers/char/serial_sa1100.c, by Deep Blue Solutions Ltd. @@ -23,24 +22,25 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ -#include <linux/config.h> #include <linux/module.h> #include <linux/tty.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/serial.h> +#include <linux/clk.h> #include <linux/console.h> #include <linux/sysrq.h> #include <linux/tty_flip.h> +#include <linux/platform_device.h> #include <asm/io.h> #include <asm/arch/at91rm9200_usart.h> -#include <asm/mach/serial_at91rm9200.h> +#include <asm/arch/at91rm9200_pdc.h> +#include <asm/mach/serial_at91.h> #include <asm/arch/board.h> -#include <asm/arch/pio.h> - +#include <asm/arch/system.h> #if defined(CONFIG_SERIAL_AT91_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) #define SUPPORT_SYSRQ @@ -67,7 +67,6 @@ #endif -#define AT91_VA_BASE_DBGU ((unsigned long) AT91_VA_BASE_SYS + AT91_DBGU) #define AT91_ISR_PASS_LIMIT 256 #define UART_PUT_CR(port,v) writel(v, (port)->membase + AT91_US_CR) @@ -87,16 +86,33 @@ /* PDC registers */ #define UART_PUT_PTCR(port,v) writel(v, (port)->membase + AT91_PDC_PTCR) +#define UART_GET_PTSR(port) readl((port)->membase + AT91_PDC_PTSR) + #define UART_PUT_RPR(port,v) writel(v, (port)->membase + AT91_PDC_RPR) +#define UART_GET_RPR(port) readl((port)->membase + AT91_PDC_RPR) #define UART_PUT_RCR(port,v) writel(v, (port)->membase + AT91_PDC_RCR) -#define UART_GET_RCR(port) readl((port)->membase + AT91_PDC_RCR) #define UART_PUT_RNPR(port,v) writel(v, (port)->membase + AT91_PDC_RNPR) #define UART_PUT_RNCR(port,v) writel(v, (port)->membase + AT91_PDC_RNCR) +#define UART_PUT_TPR(port,v) writel(v, (port)->membase + AT91_PDC_TPR) +#define UART_PUT_TCR(port,v) writel(v, (port)->membase + AT91_PDC_TCR) +//#define UART_PUT_TNPR(port,v) writel(v, (port)->membase + AT91_PDC_TNPR) +//#define UART_PUT_TNCR(port,v) writel(v, (port)->membase + AT91_PDC_TNCR) static int (*at91_open)(struct uart_port *); static void (*at91_close)(struct uart_port *); +/* + * We wrap our port structure around the generic uart_port. + */ +struct at91_uart_port { + struct uart_port uart; /* uart */ + struct clk *clk; /* uart clock */ + unsigned short suspended; /* is port suspended? */ +}; + +static struct at91_uart_port at91_ports[AT91_NR_UART]; + #ifdef SUPPORT_SYSRQ static struct console at91_console; #endif @@ -115,16 +131,19 @@ static u_int at91_tx_empty(struct uart_port *port) static void at91_set_mctrl(struct uart_port *port, u_int mctrl) { unsigned int control = 0; + unsigned int mode; - /* - * Errata #39: RTS0 is not internally connected to PA21. We need to drive - * the pin manually. - */ - if (port->mapbase == AT91_VA_BASE_US0) { - if (mctrl & TIOCM_RTS) - at91_sys_write(AT91_PIOA + PIO_CODR, AT91_PA21_RTS0); - else - at91_sys_write(AT91_PIOA + PIO_SODR, AT91_PA21_RTS0); + if (arch_identify() == ARCH_ID_AT91RM9200) { + /* + * AT91RM9200 Errata #39: RTS0 is not internally connected to PA21. + * We need to drive the pin manually. + */ + if (port->mapbase == AT91_BASE_US0) { + if (mctrl & TIOCM_RTS) + at91_sys_write(AT91_PIOA + PIO_CODR, AT91_PA21_RTS0); + else + at91_sys_write(AT91_PIOA + PIO_SODR, AT91_PA21_RTS0); + } } if (mctrl & TIOCM_RTS) @@ -137,7 +156,15 @@ static void at91_set_mctrl(struct uart_port *port, u_int mctrl) else control |= AT91_US_DTRDIS; - UART_PUT_CR(port,control); + UART_PUT_CR(port, control); + + /* Local loopback mode? */ + mode = UART_GET_MR(port) & ~AT91_US_CHMODE; + if (mctrl & TIOCM_LOOP) + mode |= AT91_US_CHMODE_LOC_LOOP; + else + mode |= AT91_US_CHMODE_NORMAL; + UART_PUT_MR(port, mode); } /* @@ -169,8 +196,9 @@ static u_int at91_get_mctrl(struct uart_port *port) */ static void at91_stop_tx(struct uart_port *port) { + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; + UART_PUT_IDR(port, AT91_US_TXRDY); - port->read_status_mask &= ~AT91_US_TXRDY; } /* @@ -178,7 +206,8 @@ static void at91_stop_tx(struct uart_port *port) */ static void at91_start_tx(struct uart_port *port) { - port->read_status_mask |= AT91_US_TXRDY; + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; + UART_PUT_IER(port, AT91_US_TXRDY); } @@ -187,6 +216,8 @@ static void at91_start_tx(struct uart_port *port) */ static void at91_stop_rx(struct uart_port *port) { + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; + UART_PUT_IDR(port, AT91_US_RXRDY); } @@ -195,7 +226,6 @@ static void at91_stop_rx(struct uart_port *port) */ static void at91_enable_ms(struct uart_port *port) { - port->read_status_mask |= (AT91_US_RIIC | AT91_US_DSRIC | AT91_US_DCDIC | AT91_US_CTSIC); UART_PUT_IER(port, AT91_US_RIIC | AT91_US_DSRIC | AT91_US_DCDIC | AT91_US_CTSIC); } @@ -218,8 +248,8 @@ static void at91_rx_chars(struct uart_port *port, struct pt_regs *regs) struct tty_struct *tty = port->info->tty; unsigned int status, ch, flg; - status = UART_GET_CSR(port) & port->read_status_mask; - while (status & (AT91_US_RXRDY)) { + status = UART_GET_CSR(port); + while (status & AT91_US_RXRDY) { ch = UART_GET_CHAR(port); port->icount.rx++; @@ -230,40 +260,38 @@ static void at91_rx_chars(struct uart_port *port, struct pt_regs *regs) * note that the error handling code is * out of the main execution path */ - if (unlikely(status & (AT91_US_PARE | AT91_US_FRAME | AT91_US_OVRE))) { + if (unlikely(status & (AT91_US_PARE | AT91_US_FRAME | AT91_US_OVRE | AT91_US_RXBRK))) { UART_PUT_CR(port, AT91_US_RSTSTA); /* clear error */ - if (status & (AT91_US_PARE)) + if (status & AT91_US_RXBRK) { + status &= ~(AT91_US_PARE | AT91_US_FRAME); /* ignore side-effect */ + port->icount.brk++; + if (uart_handle_break(port)) + goto ignore_char; + } + if (status & AT91_US_PARE) port->icount.parity++; - if (status & (AT91_US_FRAME)) + if (status & AT91_US_FRAME) port->icount.frame++; - if (status & (AT91_US_OVRE)) + if (status & AT91_US_OVRE) port->icount.overrun++; - if (status & AT91_US_PARE) + status &= port->read_status_mask; + + if (status & AT91_US_RXBRK) + flg = TTY_BREAK; + else if (status & AT91_US_PARE) flg = TTY_PARITY; else if (status & AT91_US_FRAME) flg = TTY_FRAME; - if (status & AT91_US_OVRE) { - /* - * overrun does *not* affect the character - * we read from the FIFO - */ - tty_insert_flip_char(tty, ch, flg); - ch = 0; - flg = TTY_OVERRUN; - } -#ifdef SUPPORT_SYSRQ - port->sysrq = 0; -#endif } if (uart_handle_sysrq_char(port, ch, regs)) goto ignore_char; - tty_insert_flip_char(tty, ch, flg); + uart_insert_char(port, status, AT91_US_OVRE, ch, flg); ignore_char: - status = UART_GET_CSR(port) & port->read_status_mask; + status = UART_GET_CSR(port); } tty_flip_buffer_push(tty); @@ -308,40 +336,35 @@ static void at91_tx_chars(struct uart_port *port) static irqreturn_t at91_interrupt(int irq, void *dev_id, struct pt_regs *regs) { struct uart_port *port = dev_id; + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; unsigned int status, pending, pass_counter = 0; status = UART_GET_CSR(port); - pending = status & port->read_status_mask; - if (pending) { - do { - if (pending & AT91_US_RXRDY) - at91_rx_chars(port, regs); - - /* Clear the relevent break bits */ - if (pending & AT91_US_RXBRK) { - UART_PUT_CR(port, AT91_US_RSTSTA); - port->icount.brk++; - uart_handle_break(port); - } + pending = status & UART_GET_IMR(port); + while (pending) { + /* Interrupt receive */ + if (pending & AT91_US_RXRDY) + at91_rx_chars(port, regs); + + // TODO: All reads to CSR will clear these interrupts! + if (pending & AT91_US_RIIC) port->icount.rng++; + if (pending & AT91_US_DSRIC) port->icount.dsr++; + if (pending & AT91_US_DCDIC) + uart_handle_dcd_change(port, !(status & AT91_US_DCD)); + if (pending & AT91_US_CTSIC) + uart_handle_cts_change(port, !(status & AT91_US_CTS)); + if (pending & (AT91_US_RIIC | AT91_US_DSRIC | AT91_US_DCDIC | AT91_US_CTSIC)) + wake_up_interruptible(&port->info->delta_msr_wait); + + /* Interrupt transmit */ + if (pending & AT91_US_TXRDY) + at91_tx_chars(port); + + if (pass_counter++ > AT91_ISR_PASS_LIMIT) + break; - // TODO: All reads to CSR will clear these interrupts! - if (pending & AT91_US_RIIC) port->icount.rng++; - if (pending & AT91_US_DSRIC) port->icount.dsr++; - if (pending & AT91_US_DCDIC) - uart_handle_dcd_change(port, !(status & AT91_US_DCD)); - if (pending & AT91_US_CTSIC) - uart_handle_cts_change(port, !(status & AT91_US_CTS)); - if (pending & (AT91_US_RIIC | AT91_US_DSRIC | AT91_US_DCDIC | AT91_US_CTSIC)) - wake_up_interruptible(&port->info->delta_msr_wait); - - if (pending & AT91_US_TXRDY) - at91_tx_chars(port); - if (pass_counter++ > AT91_ISR_PASS_LIMIT) - break; - - status = UART_GET_CSR(port); - pending = status & port->read_status_mask; - } while (pending); + status = UART_GET_CSR(port); + pending = status & UART_GET_IMR(port); } return IRQ_HANDLED; } @@ -351,6 +374,7 @@ static irqreturn_t at91_interrupt(int irq, void *dev_id, struct pt_regs *regs) */ static int at91_startup(struct uart_port *port) { + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; int retval; /* @@ -363,7 +387,7 @@ static int at91_startup(struct uart_port *port) /* * Allocate the IRQ */ - retval = request_irq(port->irq, at91_interrupt, SA_SHIRQ, "at91_serial", port); + retval = request_irq(port->irq, at91_interrupt, IRQF_SHARED, "at91_serial", port); if (retval) { printk("at91_serial: at91_startup - Can't get irq\n"); return retval; @@ -381,14 +405,14 @@ static int at91_startup(struct uart_port *port) } } - port->read_status_mask = AT91_US_RXRDY | AT91_US_TXRDY | AT91_US_OVRE - | AT91_US_FRAME | AT91_US_PARE | AT91_US_RXBRK; /* * Finally, enable the serial port */ UART_PUT_CR(port, AT91_US_RSTSTA | AT91_US_RSTRX); UART_PUT_CR(port, AT91_US_TXEN | AT91_US_RXEN); /* enable xmit & rcvr */ - UART_PUT_IER(port, AT91_US_RXRDY); /* do receive only */ + + UART_PUT_IER(port, AT91_US_RXRDY); /* enable receive only */ + return 0; } @@ -397,6 +421,8 @@ static int at91_startup(struct uart_port *port) */ static void at91_shutdown(struct uart_port *port) { + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; + /* * Disable all interrupts, port and break condition. */ @@ -421,21 +447,22 @@ static void at91_shutdown(struct uart_port *port) */ static void at91_serial_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; + switch (state) { case 0: /* * Enable the peripheral clock for this serial port. * This is called on uart_open() or a resume event. */ - at91_sys_write(AT91_PMC_PCER, 1 << port->irq); + clk_enable(at91_port->clk); break; case 3: /* * Disable the peripheral clock for this serial port. * This is called on uart_close() or a suspend event. */ - if (port->irq != AT91_ID_SYS) /* is this a shared clock? */ - at91_sys_write(AT91_PMC_PCDR, 1 << port->irq); + clk_disable(at91_port->clk); break; default: printk(KERN_ERR "at91_serial: unknown pm %d\n", state); @@ -494,9 +521,9 @@ static void at91_set_termios(struct uart_port *port, struct termios * termios, s spin_lock_irqsave(&port->lock, flags); - port->read_status_mask |= AT91_US_OVRE; + port->read_status_mask = AT91_US_OVRE; if (termios->c_iflag & INPCK) - port->read_status_mask |= AT91_US_FRAME | AT91_US_PARE; + port->read_status_mask |= (AT91_US_FRAME | AT91_US_PARE); if (termios->c_iflag & (BRKINT | PARMRK)) port->read_status_mask |= AT91_US_RXBRK; @@ -552,7 +579,7 @@ static void at91_set_termios(struct uart_port *port, struct termios * termios, s */ static const char *at91_type(struct uart_port *port) { - return (port->type == PORT_AT91RM9200) ? "AT91_SERIAL" : NULL; + return (port->type == PORT_AT91) ? "AT91_SERIAL" : NULL; } /* @@ -560,8 +587,15 @@ static const char *at91_type(struct uart_port *port) */ static void at91_release_port(struct uart_port *port) { - release_mem_region(port->mapbase, - (port->mapbase == AT91_VA_BASE_DBGU) ? 512 : SZ_16K); + struct platform_device *pdev = to_platform_device(port->dev); + int size = pdev->resource[0].end - pdev->resource[0].start + 1; + + release_mem_region(port->mapbase, size); + + if (port->flags & UPF_IOREMAP) { + iounmap(port->membase); + port->membase = NULL; + } } /* @@ -569,10 +603,21 @@ static void at91_release_port(struct uart_port *port) */ static int at91_request_port(struct uart_port *port) { - return request_mem_region(port->mapbase, - (port->mapbase == AT91_VA_BASE_DBGU) ? 512 : SZ_16K, - "at91_serial") != NULL ? 0 : -EBUSY; + struct platform_device *pdev = to_platform_device(port->dev); + int size = pdev->resource[0].end - pdev->resource[0].start + 1; + + if (!request_mem_region(port->mapbase, size, "at91_serial")) + return -EBUSY; + + if (port->flags & UPF_IOREMAP) { + port->membase = ioremap(port->mapbase, size); + if (port->membase == NULL) { + release_mem_region(port->mapbase, size); + return -ENOMEM; + } + } + return 0; } /* @@ -581,7 +626,7 @@ static int at91_request_port(struct uart_port *port) static void at91_config_port(struct uart_port *port, int flags) { if (flags & UART_CONFIG_TYPE) { - port->type = PORT_AT91RM9200; + port->type = PORT_AT91; at91_request_port(port); } } @@ -592,7 +637,7 @@ static void at91_config_port(struct uart_port *port, int flags) static int at91_verify_port(struct uart_port *port, struct serial_struct *ser) { int ret = 0; - if (ser->type != PORT_UNKNOWN && ser->type != PORT_AT91RM9200) + if (ser->type != PORT_UNKNOWN && ser->type != PORT_AT91) ret = -EINVAL; if (port->irq != ser->irq) ret = -EINVAL; @@ -624,33 +669,47 @@ static struct uart_ops at91_pops = { .type = at91_type, .release_port = at91_release_port, .request_port = at91_request_port, - .config_port = at91_config_port, - .verify_port = at91_verify_port, + .config_port = at91_config_port, + .verify_port = at91_verify_port, .pm = at91_serial_pm, }; -static struct uart_port at91_ports[AT91_NR_UART]; - -void __init at91_init_ports(void) +/* + * Configure the port from the platform device resource info. + */ +static void __devinit at91_init_port(struct at91_uart_port *at91_port, struct platform_device *pdev) { - static int first = 1; - int i; - - if (!first) - return; - first = 0; + struct uart_port *port = &at91_port->uart; + struct at91_uart_data *data = pdev->dev.platform_data; + + port->iotype = UPIO_MEM; + port->flags = UPF_BOOT_AUTOCONF; + port->ops = &at91_pops; + port->fifosize = 1; + port->line = pdev->id; + port->dev = &pdev->dev; + + port->mapbase = pdev->resource[0].start; + port->irq = pdev->resource[1].start; + + if (port->mapbase == AT91_VA_BASE_SYS + AT91_DBGU) /* Part of system perpherals - already mapped */ + port->membase = (void __iomem *) port->mapbase; + else { + port->flags |= UPF_IOREMAP; + port->membase = NULL; + } - for (i = 0; i < AT91_NR_UART; i++) { - at91_ports[i].iotype = UPIO_MEM; - at91_ports[i].flags = UPF_BOOT_AUTOCONF; - at91_ports[i].uartclk = at91_master_clock; - at91_ports[i].ops = &at91_pops; - at91_ports[i].fifosize = 1; - at91_ports[i].line = i; - } + if (!at91_port->clk) { /* for console, the clock could already be configured */ + at91_port->clk = clk_get(&pdev->dev, "usart"); + clk_enable(at91_port->clk); + port->uartclk = clk_get_rate(at91_port->clk); + } } -void __init at91_register_uart_fns(struct at91rm9200_port_fns *fns) +/* + * Register board-specific modem-control line handlers. + */ +void __init at91_register_uart_fns(struct at91_port_fns *fns) { if (fns->enable_ms) at91_pops.enable_ms = fns->enable_ms; @@ -664,51 +723,6 @@ void __init at91_register_uart_fns(struct at91rm9200_port_fns *fns) at91_pops.set_wake = fns->set_wake; } -/* - * Setup ports. - */ -void __init at91_register_uart(int idx, int port) -{ - if ((idx < 0) || (idx >= AT91_NR_UART)) { - printk(KERN_ERR "%s: bad index number %d\n", __FUNCTION__, idx); - return; - } - - switch (port) { - case 0: - at91_ports[idx].membase = (void __iomem *) AT91_VA_BASE_US0; - at91_ports[idx].mapbase = AT91_VA_BASE_US0; - at91_ports[idx].irq = AT91_ID_US0; - AT91_CfgPIO_USART0(); - break; - case 1: - at91_ports[idx].membase = (void __iomem *) AT91_VA_BASE_US1; - at91_ports[idx].mapbase = AT91_VA_BASE_US1; - at91_ports[idx].irq = AT91_ID_US1; - AT91_CfgPIO_USART1(); - break; - case 2: - at91_ports[idx].membase = (void __iomem *) AT91_VA_BASE_US2; - at91_ports[idx].mapbase = AT91_VA_BASE_US2; - at91_ports[idx].irq = AT91_ID_US2; - AT91_CfgPIO_USART2(); - break; - case 3: - at91_ports[idx].membase = (void __iomem *) AT91_VA_BASE_US3; - at91_ports[idx].mapbase = AT91_VA_BASE_US3; - at91_ports[idx].irq = AT91_ID_US3; - AT91_CfgPIO_USART3(); - break; - case 4: - at91_ports[idx].membase = (void __iomem *) AT91_VA_BASE_DBGU; - at91_ports[idx].mapbase = AT91_VA_BASE_DBGU; - at91_ports[idx].irq = AT91_ID_SYS; - AT91_CfgPIO_DBGU(); - break; - default: - printk(KERN_ERR "%s : bad port number %d\n", __FUNCTION__, port); - } -} #ifdef CONFIG_SERIAL_AT91_CONSOLE static void at91_console_putchar(struct uart_port *port, int ch) @@ -723,7 +737,7 @@ static void at91_console_putchar(struct uart_port *port, int ch) */ static void at91_console_write(struct console *co, const char *s, u_int count) { - struct uart_port *port = at91_ports + co->index; + struct uart_port *port = &at91_ports[co->index].uart; unsigned int status, imr; /* @@ -778,23 +792,15 @@ static void __init at91_console_get_options(struct uart_port *port, int *baud, i static int __init at91_console_setup(struct console *co, char *options) { - struct uart_port *port; + struct uart_port *port = &at91_ports[co->index].uart; int baud = 115200; int bits = 8; int parity = 'n'; int flow = 'n'; - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - port = uart_get_console(at91_ports, AT91_NR_UART, co); + if (port->membase == 0) /* Port not initialized yet - delay setup */ + return -ENODEV; - /* - * Enable the serial console, in-case bootloader did not do it. - */ - at91_sys_write(AT91_PMC_PCER, 1 << port->irq); /* enable clock */ UART_PUT_IDR(port, -1); /* disable interrupts */ UART_PUT_CR(port, AT91_US_RSTSTA | AT91_US_RSTRX); UART_PUT_CR(port, AT91_US_TXEN | AT91_US_RXEN); @@ -821,58 +827,147 @@ static struct console at91_console = { #define AT91_CONSOLE_DEVICE &at91_console -static int __init at91_console_init(void) +/* + * Early console initialization (before VM subsystem initialized). + */ +static int __init at91_console_init(void) { - at91_init_ports(); + if (at91_default_console_device) { + add_preferred_console(AT91_DEVICENAME, at91_default_console_device->id, NULL); + at91_init_port(&(at91_ports[at91_default_console_device->id]), at91_default_console_device); + register_console(&at91_console); + } - at91_console.index = at91_console_port; - register_console(&at91_console); return 0; } console_initcall(at91_console_init); +/* + * Late console initialization. + */ +static int __init at91_late_console_init(void) +{ + if (at91_default_console_device && !(at91_console.flags & CON_ENABLED)) + register_console(&at91_console); + + return 0; +} +core_initcall(at91_late_console_init); + #else #define AT91_CONSOLE_DEVICE NULL #endif static struct uart_driver at91_uart = { .owner = THIS_MODULE, - .driver_name = AT91_DEVICENAME, + .driver_name = "at91_serial", .dev_name = AT91_DEVICENAME, - .devfs_name = AT91_DEVICENAME, .major = SERIAL_AT91_MAJOR, .minor = MINOR_START, .nr = AT91_NR_UART, .cons = AT91_CONSOLE_DEVICE, }; -static int __init at91_serial_init(void) +#ifdef CONFIG_PM +static int at91_serial_suspend(struct platform_device *pdev, pm_message_t state) { - int ret, i; + struct uart_port *port = platform_get_drvdata(pdev); + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; + + if (device_may_wakeup(&pdev->dev) && !at91_suspend_entering_slow_clock()) + enable_irq_wake(port->irq); + else { + disable_irq_wake(port->irq); + uart_suspend_port(&at91_uart, port); + at91_port->suspended = 1; + } - at91_init_ports(); + return 0; +} - ret = uart_register_driver(&at91_uart); - if (ret) - return ret; +static int at91_serial_resume(struct platform_device *pdev) +{ + struct uart_port *port = platform_get_drvdata(pdev); + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; - for (i = 0; i < AT91_NR_UART; i++) { - if (at91_serial_map[i] >= 0) - uart_add_one_port(&at91_uart, &at91_ports[i]); + if (at91_port->suspended) { + uart_resume_port(&at91_uart, port); + at91_port->suspended = 0; } return 0; } +#else +#define at91_serial_suspend NULL +#define at91_serial_resume NULL +#endif -static void __exit at91_serial_exit(void) +static int __devinit at91_serial_probe(struct platform_device *pdev) { - int i; + struct at91_uart_port *port; + int ret; - for (i = 0; i < AT91_NR_UART; i++) { - if (at91_serial_map[i] >= 0) - uart_remove_one_port(&at91_uart, &at91_ports[i]); - } + port = &at91_ports[pdev->id]; + at91_init_port(port, pdev); + ret = uart_add_one_port(&at91_uart, &port->uart); + if (!ret) { + device_init_wakeup(&pdev->dev, 1); + platform_set_drvdata(pdev, port); + } + + return ret; +} + +static int __devexit at91_serial_remove(struct platform_device *pdev) +{ + struct uart_port *port = platform_get_drvdata(pdev); + struct at91_uart_port *at91_port = (struct at91_uart_port *) port; + int ret = 0; + + clk_disable(at91_port->clk); + clk_put(at91_port->clk); + + device_init_wakeup(&pdev->dev, 0); + platform_set_drvdata(pdev, NULL); + + if (port) { + ret = uart_remove_one_port(&at91_uart, port); + kfree(port); + } + + return ret; +} + +static struct platform_driver at91_serial_driver = { + .probe = at91_serial_probe, + .remove = __devexit_p(at91_serial_remove), + .suspend = at91_serial_suspend, + .resume = at91_serial_resume, + .driver = { + .name = "at91_usart", + .owner = THIS_MODULE, + }, +}; + +static int __init at91_serial_init(void) +{ + int ret; + + ret = uart_register_driver(&at91_uart); + if (ret) + return ret; + + ret = platform_driver_register(&at91_serial_driver); + if (ret) + uart_unregister_driver(&at91_uart); + + return ret; +} + +static void __exit at91_serial_exit(void) +{ + platform_driver_unregister(&at91_serial_driver); uart_unregister_driver(&at91_uart); } |