diff options
Diffstat (limited to 'drivers/serial/sa1100.c')
-rw-r--r-- | drivers/serial/sa1100.c | 918 |
1 files changed, 0 insertions, 918 deletions
diff --git a/drivers/serial/sa1100.c b/drivers/serial/sa1100.c deleted file mode 100644 index 2199d81..0000000 --- a/drivers/serial/sa1100.c +++ /dev/null @@ -1,918 +0,0 @@ -/* - * linux/drivers/char/sa1100.c - * - * Driver for SA11x0 serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright (C) 2000 Deep Blue Solutions Ltd. - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#if defined(CONFIG_SERIAL_SA1100_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/io.h> - -#include <asm/irq.h> -#include <mach/hardware.h> -#include <asm/mach/serial_sa1100.h> - -/* We've been assigned a range on the "Low-density serial ports" major */ -#define SERIAL_SA1100_MAJOR 204 -#define MINOR_START 5 - -#define NR_PORTS 3 - -#define SA1100_ISR_PASS_LIMIT 256 - -/* - * Convert from ignore_status_mask or read_status_mask to UTSR[01] - */ -#define SM_TO_UTSR0(x) ((x) & 0xff) -#define SM_TO_UTSR1(x) ((x) >> 8) -#define UTSR0_TO_SM(x) ((x)) -#define UTSR1_TO_SM(x) ((x) << 8) - -#define UART_GET_UTCR0(sport) __raw_readl((sport)->port.membase + UTCR0) -#define UART_GET_UTCR1(sport) __raw_readl((sport)->port.membase + UTCR1) -#define UART_GET_UTCR2(sport) __raw_readl((sport)->port.membase + UTCR2) -#define UART_GET_UTCR3(sport) __raw_readl((sport)->port.membase + UTCR3) -#define UART_GET_UTSR0(sport) __raw_readl((sport)->port.membase + UTSR0) -#define UART_GET_UTSR1(sport) __raw_readl((sport)->port.membase + UTSR1) -#define UART_GET_CHAR(sport) __raw_readl((sport)->port.membase + UTDR) - -#define UART_PUT_UTCR0(sport,v) __raw_writel((v),(sport)->port.membase + UTCR0) -#define UART_PUT_UTCR1(sport,v) __raw_writel((v),(sport)->port.membase + UTCR1) -#define UART_PUT_UTCR2(sport,v) __raw_writel((v),(sport)->port.membase + UTCR2) -#define UART_PUT_UTCR3(sport,v) __raw_writel((v),(sport)->port.membase + UTCR3) -#define UART_PUT_UTSR0(sport,v) __raw_writel((v),(sport)->port.membase + UTSR0) -#define UART_PUT_UTSR1(sport,v) __raw_writel((v),(sport)->port.membase + UTSR1) -#define UART_PUT_CHAR(sport,v) __raw_writel((v),(sport)->port.membase + UTDR) - -/* - * This is the size of our serial port register set. - */ -#define UART_PORT_SIZE 0x24 - -/* - * This determines how often we check the modem status signals - * for any change. They generally aren't connected to an IRQ - * so we have to poll them. We also check immediately before - * filling the TX fifo incase CTS has been dropped. - */ -#define MCTRL_TIMEOUT (250*HZ/1000) - -struct sa1100_port { - struct uart_port port; - struct timer_list timer; - unsigned int old_status; -}; - -/* - * Handle any change of modem status signal since we were last called. - */ -static void sa1100_mctrl_check(struct sa1100_port *sport) -{ - unsigned int status, changed; - - status = sport->port.ops->get_mctrl(&sport->port); - changed = status ^ sport->old_status; - - if (changed == 0) - return; - - sport->old_status = status; - - if (changed & TIOCM_RI) - sport->port.icount.rng++; - if (changed & TIOCM_DSR) - sport->port.icount.dsr++; - if (changed & TIOCM_CAR) - uart_handle_dcd_change(&sport->port, status & TIOCM_CAR); - if (changed & TIOCM_CTS) - uart_handle_cts_change(&sport->port, status & TIOCM_CTS); - - wake_up_interruptible(&sport->port.state->port.delta_msr_wait); -} - -/* - * This is our per-port timeout handler, for checking the - * modem status signals. - */ -static void sa1100_timeout(unsigned long data) -{ - struct sa1100_port *sport = (struct sa1100_port *)data; - unsigned long flags; - - if (sport->port.state) { - spin_lock_irqsave(&sport->port.lock, flags); - sa1100_mctrl_check(sport); - spin_unlock_irqrestore(&sport->port.lock, flags); - - mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT); - } -} - -/* - * interrupts disabled on entry - */ -static void sa1100_stop_tx(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - u32 utcr3; - - utcr3 = UART_GET_UTCR3(sport); - UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_TIE); - sport->port.read_status_mask &= ~UTSR0_TO_SM(UTSR0_TFS); -} - -/* - * port locked and interrupts disabled - */ -static void sa1100_start_tx(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - u32 utcr3; - - utcr3 = UART_GET_UTCR3(sport); - sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS); - UART_PUT_UTCR3(sport, utcr3 | UTCR3_TIE); -} - -/* - * Interrupts enabled - */ -static void sa1100_stop_rx(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - u32 utcr3; - - utcr3 = UART_GET_UTCR3(sport); - UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_RIE); -} - -/* - * Set the modem control timer to fire immediately. - */ -static void sa1100_enable_ms(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - mod_timer(&sport->timer, jiffies); -} - -static void -sa1100_rx_chars(struct sa1100_port *sport) -{ - struct tty_struct *tty = sport->port.state->port.tty; - unsigned int status, ch, flg; - - status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) | - UTSR0_TO_SM(UART_GET_UTSR0(sport)); - while (status & UTSR1_TO_SM(UTSR1_RNE)) { - ch = UART_GET_CHAR(sport); - - sport->port.icount.rx++; - - flg = TTY_NORMAL; - - /* - * note that the error handling code is - * out of the main execution path - */ - if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) { - if (status & UTSR1_TO_SM(UTSR1_PRE)) - sport->port.icount.parity++; - else if (status & UTSR1_TO_SM(UTSR1_FRE)) - sport->port.icount.frame++; - if (status & UTSR1_TO_SM(UTSR1_ROR)) - sport->port.icount.overrun++; - - status &= sport->port.read_status_mask; - - if (status & UTSR1_TO_SM(UTSR1_PRE)) - flg = TTY_PARITY; - else if (status & UTSR1_TO_SM(UTSR1_FRE)) - flg = TTY_FRAME; - -#ifdef SUPPORT_SYSRQ - sport->port.sysrq = 0; -#endif - } - - if (uart_handle_sysrq_char(&sport->port, ch)) - goto ignore_char; - - uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg); - - ignore_char: - status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) | - UTSR0_TO_SM(UART_GET_UTSR0(sport)); - } - tty_flip_buffer_push(tty); -} - -static void sa1100_tx_chars(struct sa1100_port *sport) -{ - struct circ_buf *xmit = &sport->port.state->xmit; - - if (sport->port.x_char) { - UART_PUT_CHAR(sport, sport->port.x_char); - sport->port.icount.tx++; - sport->port.x_char = 0; - return; - } - - /* - * Check the modem control lines before - * transmitting anything. - */ - sa1100_mctrl_check(sport); - - if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) { - sa1100_stop_tx(&sport->port); - return; - } - - /* - * Tried using FIFO (not checking TNF) for fifo fill: - * still had the '4 bytes repeated' problem. - */ - while (UART_GET_UTSR1(sport) & UTSR1_TNF) { - UART_PUT_CHAR(sport, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - sport->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&sport->port); - - if (uart_circ_empty(xmit)) - sa1100_stop_tx(&sport->port); -} - -static irqreturn_t sa1100_int(int irq, void *dev_id) -{ - struct sa1100_port *sport = dev_id; - unsigned int status, pass_counter = 0; - - spin_lock(&sport->port.lock); - status = UART_GET_UTSR0(sport); - status &= SM_TO_UTSR0(sport->port.read_status_mask) | ~UTSR0_TFS; - do { - if (status & (UTSR0_RFS | UTSR0_RID)) { - /* Clear the receiver idle bit, if set */ - if (status & UTSR0_RID) - UART_PUT_UTSR0(sport, UTSR0_RID); - sa1100_rx_chars(sport); - } - - /* Clear the relevant break bits */ - if (status & (UTSR0_RBB | UTSR0_REB)) - UART_PUT_UTSR0(sport, status & (UTSR0_RBB | UTSR0_REB)); - - if (status & UTSR0_RBB) - sport->port.icount.brk++; - - if (status & UTSR0_REB) - uart_handle_break(&sport->port); - - if (status & UTSR0_TFS) - sa1100_tx_chars(sport); - if (pass_counter++ > SA1100_ISR_PASS_LIMIT) - break; - status = UART_GET_UTSR0(sport); - status &= SM_TO_UTSR0(sport->port.read_status_mask) | - ~UTSR0_TFS; - } while (status & (UTSR0_TFS | UTSR0_RFS | UTSR0_RID)); - spin_unlock(&sport->port.lock); - - return IRQ_HANDLED; -} - -/* - * Return TIOCSER_TEMT when transmitter is not busy. - */ -static unsigned int sa1100_tx_empty(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - return UART_GET_UTSR1(sport) & UTSR1_TBY ? 0 : TIOCSER_TEMT; -} - -static unsigned int sa1100_get_mctrl(struct uart_port *port) -{ - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; -} - -static void sa1100_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -/* - * Interrupts always disabled. - */ -static void sa1100_break_ctl(struct uart_port *port, int break_state) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - unsigned long flags; - unsigned int utcr3; - - spin_lock_irqsave(&sport->port.lock, flags); - utcr3 = UART_GET_UTCR3(sport); - if (break_state == -1) - utcr3 |= UTCR3_BRK; - else - utcr3 &= ~UTCR3_BRK; - UART_PUT_UTCR3(sport, utcr3); - spin_unlock_irqrestore(&sport->port.lock, flags); -} - -static int sa1100_startup(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - int retval; - - /* - * Allocate the IRQ - */ - retval = request_irq(sport->port.irq, sa1100_int, 0, - "sa11x0-uart", sport); - if (retval) - return retval; - - /* - * Finally, clear and enable interrupts - */ - UART_PUT_UTSR0(sport, -1); - UART_PUT_UTCR3(sport, UTCR3_RXE | UTCR3_TXE | UTCR3_RIE); - - /* - * Enable modem status interrupts - */ - spin_lock_irq(&sport->port.lock); - sa1100_enable_ms(&sport->port); - spin_unlock_irq(&sport->port.lock); - - return 0; -} - -static void sa1100_shutdown(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - /* - * Stop our timer. - */ - del_timer_sync(&sport->timer); - - /* - * Free the interrupt - */ - free_irq(sport->port.irq, sport); - - /* - * Disable all interrupts, port and break condition. - */ - UART_PUT_UTCR3(sport, 0); -} - -static void -sa1100_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - unsigned long flags; - unsigned int utcr0, old_utcr3, baud, quot; - unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; - - /* - * We only support CS7 and CS8. - */ - while ((termios->c_cflag & CSIZE) != CS7 && - (termios->c_cflag & CSIZE) != CS8) { - termios->c_cflag &= ~CSIZE; - termios->c_cflag |= old_csize; - old_csize = CS8; - } - - if ((termios->c_cflag & CSIZE) == CS8) - utcr0 = UTCR0_DSS; - else - utcr0 = 0; - - if (termios->c_cflag & CSTOPB) - utcr0 |= UTCR0_SBS; - if (termios->c_cflag & PARENB) { - utcr0 |= UTCR0_PE; - if (!(termios->c_cflag & PARODD)) - utcr0 |= UTCR0_OES; - } - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - spin_lock_irqsave(&sport->port.lock, flags); - - sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS); - sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR); - if (termios->c_iflag & INPCK) - sport->port.read_status_mask |= - UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE); - if (termios->c_iflag & (BRKINT | PARMRK)) - sport->port.read_status_mask |= - UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB); - - /* - * Characters to ignore - */ - sport->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - sport->port.ignore_status_mask |= - UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE); - if (termios->c_iflag & IGNBRK) { - sport->port.ignore_status_mask |= - UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB); - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - sport->port.ignore_status_mask |= - UTSR1_TO_SM(UTSR1_ROR); - } - - del_timer_sync(&sport->timer); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * disable interrupts and drain transmitter - */ - old_utcr3 = UART_GET_UTCR3(sport); - UART_PUT_UTCR3(sport, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE)); - - while (UART_GET_UTSR1(sport) & UTSR1_TBY) - barrier(); - - /* then, disable everything */ - UART_PUT_UTCR3(sport, 0); - - /* set the parity, stop bits and data size */ - UART_PUT_UTCR0(sport, utcr0); - - /* set the baud rate */ - quot -= 1; - UART_PUT_UTCR1(sport, ((quot & 0xf00) >> 8)); - UART_PUT_UTCR2(sport, (quot & 0xff)); - - UART_PUT_UTSR0(sport, -1); - - UART_PUT_UTCR3(sport, old_utcr3); - - if (UART_ENABLE_MS(&sport->port, termios->c_cflag)) - sa1100_enable_ms(&sport->port); - - spin_unlock_irqrestore(&sport->port.lock, flags); -} - -static const char *sa1100_type(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - return sport->port.type == PORT_SA1100 ? "SA1100" : NULL; -} - -/* - * Release the memory region(s) being used by 'port'. - */ -static void sa1100_release_port(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - release_mem_region(sport->port.mapbase, UART_PORT_SIZE); -} - -/* - * Request the memory region(s) being used by 'port'. - */ -static int sa1100_request_port(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - return request_mem_region(sport->port.mapbase, UART_PORT_SIZE, - "sa11x0-uart") != NULL ? 0 : -EBUSY; -} - -/* - * Configure/autoconfigure the port. - */ -static void sa1100_config_port(struct uart_port *port, int flags) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - if (flags & UART_CONFIG_TYPE && - sa1100_request_port(&sport->port) == 0) - sport->port.type = PORT_SA1100; -} - -/* - * Verify the new serial_struct (for TIOCSSERIAL). - * The only change we allow are to the flags and type, and - * even then only between PORT_SA1100 and PORT_UNKNOWN - */ -static int -sa1100_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_SA1100) - ret = -EINVAL; - if (sport->port.irq != ser->irq) - ret = -EINVAL; - if (ser->io_type != SERIAL_IO_MEM) - ret = -EINVAL; - if (sport->port.uartclk / 16 != ser->baud_base) - ret = -EINVAL; - if ((void *)sport->port.mapbase != ser->iomem_base) - ret = -EINVAL; - if (sport->port.iobase != ser->port) - ret = -EINVAL; - if (ser->hub6 != 0) - ret = -EINVAL; - return ret; -} - -static struct uart_ops sa1100_pops = { - .tx_empty = sa1100_tx_empty, - .set_mctrl = sa1100_set_mctrl, - .get_mctrl = sa1100_get_mctrl, - .stop_tx = sa1100_stop_tx, - .start_tx = sa1100_start_tx, - .stop_rx = sa1100_stop_rx, - .enable_ms = sa1100_enable_ms, - .break_ctl = sa1100_break_ctl, - .startup = sa1100_startup, - .shutdown = sa1100_shutdown, - .set_termios = sa1100_set_termios, - .type = sa1100_type, - .release_port = sa1100_release_port, - .request_port = sa1100_request_port, - .config_port = sa1100_config_port, - .verify_port = sa1100_verify_port, -}; - -static struct sa1100_port sa1100_ports[NR_PORTS]; - -/* - * Setup the SA1100 serial ports. Note that we don't include the IrDA - * port here since we have our own SIR/FIR driver (see drivers/net/irda) - * - * Note also that we support "console=ttySAx" where "x" is either 0 or 1. - * Which serial port this ends up being depends on the machine you're - * running this kernel on. I'm not convinced that this is a good idea, - * but that's the way it traditionally works. - * - * Note that NanoEngine UART3 becomes UART2, and UART2 is no longer - * used here. - */ -static void __init sa1100_init_ports(void) -{ - static int first = 1; - int i; - - if (!first) - return; - first = 0; - - for (i = 0; i < NR_PORTS; i++) { - sa1100_ports[i].port.uartclk = 3686400; - sa1100_ports[i].port.ops = &sa1100_pops; - sa1100_ports[i].port.fifosize = 8; - sa1100_ports[i].port.line = i; - sa1100_ports[i].port.iotype = UPIO_MEM; - init_timer(&sa1100_ports[i].timer); - sa1100_ports[i].timer.function = sa1100_timeout; - sa1100_ports[i].timer.data = (unsigned long)&sa1100_ports[i]; - } - - /* - * make transmit lines outputs, so that when the port - * is closed, the output is in the MARK state. - */ - PPDR |= PPC_TXD1 | PPC_TXD3; - PPSR |= PPC_TXD1 | PPC_TXD3; -} - -void __devinit sa1100_register_uart_fns(struct sa1100_port_fns *fns) -{ - if (fns->get_mctrl) - sa1100_pops.get_mctrl = fns->get_mctrl; - if (fns->set_mctrl) - sa1100_pops.set_mctrl = fns->set_mctrl; - - sa1100_pops.pm = fns->pm; - sa1100_pops.set_wake = fns->set_wake; -} - -void __init sa1100_register_uart(int idx, int port) -{ - if (idx >= NR_PORTS) { - printk(KERN_ERR "%s: bad index number %d\n", __func__, idx); - return; - } - - switch (port) { - case 1: - sa1100_ports[idx].port.membase = (void __iomem *)&Ser1UTCR0; - sa1100_ports[idx].port.mapbase = _Ser1UTCR0; - sa1100_ports[idx].port.irq = IRQ_Ser1UART; - sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; - break; - - case 2: - sa1100_ports[idx].port.membase = (void __iomem *)&Ser2UTCR0; - sa1100_ports[idx].port.mapbase = _Ser2UTCR0; - sa1100_ports[idx].port.irq = IRQ_Ser2ICP; - sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; - break; - - case 3: - sa1100_ports[idx].port.membase = (void __iomem *)&Ser3UTCR0; - sa1100_ports[idx].port.mapbase = _Ser3UTCR0; - sa1100_ports[idx].port.irq = IRQ_Ser3UART; - sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; - break; - - default: - printk(KERN_ERR "%s: bad port number %d\n", __func__, port); - } -} - - -#ifdef CONFIG_SERIAL_SA1100_CONSOLE -static void sa1100_console_putchar(struct uart_port *port, int ch) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - while (!(UART_GET_UTSR1(sport) & UTSR1_TNF)) - barrier(); - UART_PUT_CHAR(sport, ch); -} - -/* - * Interrupts are disabled on entering - */ -static void -sa1100_console_write(struct console *co, const char *s, unsigned int count) -{ - struct sa1100_port *sport = &sa1100_ports[co->index]; - unsigned int old_utcr3, status; - - /* - * First, save UTCR3 and then disable interrupts - */ - old_utcr3 = UART_GET_UTCR3(sport); - UART_PUT_UTCR3(sport, (old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE)) | - UTCR3_TXE); - - uart_console_write(&sport->port, s, count, sa1100_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore UTCR3 - */ - do { - status = UART_GET_UTSR1(sport); - } while (status & UTSR1_TBY); - UART_PUT_UTCR3(sport, old_utcr3); -} - -/* - * If the port was already initialised (eg, by a boot loader), - * try to determine the current setup. - */ -static void __init -sa1100_console_get_options(struct sa1100_port *sport, int *baud, - int *parity, int *bits) -{ - unsigned int utcr3; - - utcr3 = UART_GET_UTCR3(sport) & (UTCR3_RXE | UTCR3_TXE); - if (utcr3 == (UTCR3_RXE | UTCR3_TXE)) { - /* ok, the port was enabled */ - unsigned int utcr0, quot; - - utcr0 = UART_GET_UTCR0(sport); - - *parity = 'n'; - if (utcr0 & UTCR0_PE) { - if (utcr0 & UTCR0_OES) - *parity = 'e'; - else - *parity = 'o'; - } - - if (utcr0 & UTCR0_DSS) - *bits = 8; - else - *bits = 7; - - quot = UART_GET_UTCR2(sport) | UART_GET_UTCR1(sport) << 8; - quot &= 0xfff; - *baud = sport->port.uartclk / (16 * (quot + 1)); - } -} - -static int __init -sa1100_console_setup(struct console *co, char *options) -{ - struct sa1100_port *sport; - int baud = 9600; - 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. - */ - if (co->index == -1 || co->index >= NR_PORTS) - co->index = 0; - sport = &sa1100_ports[co->index]; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - sa1100_console_get_options(sport, &baud, &parity, &bits); - - return uart_set_options(&sport->port, co, baud, parity, bits, flow); -} - -static struct uart_driver sa1100_reg; -static struct console sa1100_console = { - .name = "ttySA", - .write = sa1100_console_write, - .device = uart_console_device, - .setup = sa1100_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sa1100_reg, -}; - -static int __init sa1100_rs_console_init(void) -{ - sa1100_init_ports(); - register_console(&sa1100_console); - return 0; -} -console_initcall(sa1100_rs_console_init); - -#define SA1100_CONSOLE &sa1100_console -#else -#define SA1100_CONSOLE NULL -#endif - -static struct uart_driver sa1100_reg = { - .owner = THIS_MODULE, - .driver_name = "ttySA", - .dev_name = "ttySA", - .major = SERIAL_SA1100_MAJOR, - .minor = MINOR_START, - .nr = NR_PORTS, - .cons = SA1100_CONSOLE, -}; - -static int sa1100_serial_suspend(struct platform_device *dev, pm_message_t state) -{ - struct sa1100_port *sport = platform_get_drvdata(dev); - - if (sport) - uart_suspend_port(&sa1100_reg, &sport->port); - - return 0; -} - -static int sa1100_serial_resume(struct platform_device *dev) -{ - struct sa1100_port *sport = platform_get_drvdata(dev); - - if (sport) - uart_resume_port(&sa1100_reg, &sport->port); - - return 0; -} - -static int sa1100_serial_probe(struct platform_device *dev) -{ - struct resource *res = dev->resource; - int i; - - for (i = 0; i < dev->num_resources; i++, res++) - if (res->flags & IORESOURCE_MEM) - break; - - if (i < dev->num_resources) { - for (i = 0; i < NR_PORTS; i++) { - if (sa1100_ports[i].port.mapbase != res->start) - continue; - - sa1100_ports[i].port.dev = &dev->dev; - uart_add_one_port(&sa1100_reg, &sa1100_ports[i].port); - platform_set_drvdata(dev, &sa1100_ports[i]); - break; - } - } - - return 0; -} - -static int sa1100_serial_remove(struct platform_device *pdev) -{ - struct sa1100_port *sport = platform_get_drvdata(pdev); - - platform_set_drvdata(pdev, NULL); - - if (sport) - uart_remove_one_port(&sa1100_reg, &sport->port); - - return 0; -} - -static struct platform_driver sa11x0_serial_driver = { - .probe = sa1100_serial_probe, - .remove = sa1100_serial_remove, - .suspend = sa1100_serial_suspend, - .resume = sa1100_serial_resume, - .driver = { - .name = "sa11x0-uart", - .owner = THIS_MODULE, - }, -}; - -static int __init sa1100_serial_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: SA11x0 driver\n"); - - sa1100_init_ports(); - - ret = uart_register_driver(&sa1100_reg); - if (ret == 0) { - ret = platform_driver_register(&sa11x0_serial_driver); - if (ret) - uart_unregister_driver(&sa1100_reg); - } - return ret; -} - -static void __exit sa1100_serial_exit(void) -{ - platform_driver_unregister(&sa11x0_serial_driver); - uart_unregister_driver(&sa1100_reg); -} - -module_init(sa1100_serial_init); -module_exit(sa1100_serial_exit); - -MODULE_AUTHOR("Deep Blue Solutions Ltd"); -MODULE_DESCRIPTION("SA1100 generic serial port driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_SA1100_MAJOR); -MODULE_ALIAS("platform:sa11x0-uart"); |