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authorGreg Kroah-Hartman <gregkh@suse.de>2011-01-13 12:10:18 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2011-01-13 12:10:18 -0800
commitab4382d27412e7e3e7c936e8d50d8888dfac3df8 (patch)
tree51d96dea2431140358784b6b426715f37f74fd53 /drivers/serial/sunsu.c
parent728674a7e466628df2aeec6d11a2ae1ef968fb67 (diff)
tty: move drivers/serial/ to drivers/tty/serial/
The serial drivers are really just tty drivers, so move them to drivers/tty/ to make things a bit neater overall. This is part of the tty/serial driver movement proceedure as proposed by Arnd Bergmann and approved by everyone involved a number of months ago. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl> Cc: Michael H. Warfield <mhw@wittsend.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial/sunsu.c')
-rw-r--r--drivers/serial/sunsu.c1608
1 files changed, 0 insertions, 1608 deletions
diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
deleted file mode 100644
index 551ebfe3ccb..00000000000
--- a/drivers/serial/sunsu.c
+++ /dev/null
@@ -1,1608 +0,0 @@
-/*
- * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI
- *
- * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
- * Copyright (C) 1998-1999 Pete Zaitcev (zaitcev@yahoo.com)
- *
- * This is mainly a variation of 8250.c, credits go to authors mentioned
- * therein. In fact this driver should be merged into the generic 8250.c
- * infrastructure perhaps using a 8250_sparc.c module.
- *
- * Fixed to use tty_get_baud_rate().
- * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
- *
- * Converted to new 2.5.x UART layer.
- * David S. Miller (davem@davemloft.net), 2002-Jul-29
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/spinlock.h>
-#include <linux/errno.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/circ_buf.h>
-#include <linux/serial.h>
-#include <linux/sysrq.h>
-#include <linux/console.h>
-#include <linux/slab.h>
-#ifdef CONFIG_SERIO
-#include <linux/serio.h>
-#endif
-#include <linux/serial_reg.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/of_device.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/prom.h>
-
-#if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/serial_core.h>
-
-#include "suncore.h"
-
-/* We are on a NS PC87303 clocked with 24.0 MHz, which results
- * in a UART clock of 1.8462 MHz.
- */
-#define SU_BASE_BAUD (1846200 / 16)
-
-enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT };
-static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" };
-
-/*
- * Here we define the default xmit fifo size used for each type of UART.
- */
-static const struct serial_uart_config uart_config[PORT_MAX_8250+1] = {
- { "unknown", 1, 0 },
- { "8250", 1, 0 },
- { "16450", 1, 0 },
- { "16550", 1, 0 },
- { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO },
- { "Cirrus", 1, 0 },
- { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH },
- { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
- { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO },
- { "Startech", 1, 0 },
- { "16C950/954", 128, UART_CLEAR_FIFO | UART_USE_FIFO },
- { "ST16654", 64, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
- { "XR16850", 128, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
- { "RSA", 2048, UART_CLEAR_FIFO | UART_USE_FIFO }
-};
-
-struct uart_sunsu_port {
- struct uart_port port;
- unsigned char acr;
- unsigned char ier;
- unsigned short rev;
- unsigned char lcr;
- unsigned int lsr_break_flag;
- unsigned int cflag;
-
- /* Probing information. */
- enum su_type su_type;
- unsigned int type_probed; /* XXX Stupid */
- unsigned long reg_size;
-
-#ifdef CONFIG_SERIO
- struct serio serio;
- int serio_open;
-#endif
-};
-
-static unsigned int serial_in(struct uart_sunsu_port *up, int offset)
-{
- offset <<= up->port.regshift;
-
- switch (up->port.iotype) {
- case UPIO_HUB6:
- outb(up->port.hub6 - 1 + offset, up->port.iobase);
- return inb(up->port.iobase + 1);
-
- case UPIO_MEM:
- return readb(up->port.membase + offset);
-
- default:
- return inb(up->port.iobase + offset);
- }
-}
-
-static void serial_out(struct uart_sunsu_port *up, int offset, int value)
-{
-#ifndef CONFIG_SPARC64
- /*
- * MrCoffee has weird schematics: IRQ4 & P10(?) pins of SuperIO are
- * connected with a gate then go to SlavIO. When IRQ4 goes tristated
- * gate outputs a logical one. Since we use level triggered interrupts
- * we have lockup and watchdog reset. We cannot mask IRQ because
- * keyboard shares IRQ with us (Word has it as Bob Smelik's design).
- * This problem is similar to what Alpha people suffer, see serial.c.
- */
- if (offset == UART_MCR)
- value |= UART_MCR_OUT2;
-#endif
- offset <<= up->port.regshift;
-
- switch (up->port.iotype) {
- case UPIO_HUB6:
- outb(up->port.hub6 - 1 + offset, up->port.iobase);
- outb(value, up->port.iobase + 1);
- break;
-
- case UPIO_MEM:
- writeb(value, up->port.membase + offset);
- break;
-
- default:
- outb(value, up->port.iobase + offset);
- }
-}
-
-/*
- * We used to support using pause I/O for certain machines. We
- * haven't supported this for a while, but just in case it's badly
- * needed for certain old 386 machines, I've left these #define's
- * in....
- */
-#define serial_inp(up, offset) serial_in(up, offset)
-#define serial_outp(up, offset, value) serial_out(up, offset, value)
-
-
-/*
- * For the 16C950
- */
-static void serial_icr_write(struct uart_sunsu_port *up, int offset, int value)
-{
- serial_out(up, UART_SCR, offset);
- serial_out(up, UART_ICR, value);
-}
-
-#if 0 /* Unused currently */
-static unsigned int serial_icr_read(struct uart_sunsu_port *up, int offset)
-{
- unsigned int value;
-
- serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD);
- serial_out(up, UART_SCR, offset);
- value = serial_in(up, UART_ICR);
- serial_icr_write(up, UART_ACR, up->acr);
-
- return value;
-}
-#endif
-
-#ifdef CONFIG_SERIAL_8250_RSA
-/*
- * Attempts to turn on the RSA FIFO. Returns zero on failure.
- * We set the port uart clock rate if we succeed.
- */
-static int __enable_rsa(struct uart_sunsu_port *up)
-{
- unsigned char mode;
- int result;
-
- mode = serial_inp(up, UART_RSA_MSR);
- result = mode & UART_RSA_MSR_FIFO;
-
- if (!result) {
- serial_outp(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO);
- mode = serial_inp(up, UART_RSA_MSR);
- result = mode & UART_RSA_MSR_FIFO;
- }
-
- if (result)
- up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16;
-
- return result;
-}
-
-static void enable_rsa(struct uart_sunsu_port *up)
-{
- if (up->port.type == PORT_RSA) {
- if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) {
- spin_lock_irq(&up->port.lock);
- __enable_rsa(up);
- spin_unlock_irq(&up->port.lock);
- }
- if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16)
- serial_outp(up, UART_RSA_FRR, 0);
- }
-}
-
-/*
- * Attempts to turn off the RSA FIFO. Returns zero on failure.
- * It is unknown why interrupts were disabled in here. However,
- * the caller is expected to preserve this behaviour by grabbing
- * the spinlock before calling this function.
- */
-static void disable_rsa(struct uart_sunsu_port *up)
-{
- unsigned char mode;
- int result;
-
- if (up->port.type == PORT_RSA &&
- up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) {
- spin_lock_irq(&up->port.lock);
-
- mode = serial_inp(up, UART_RSA_MSR);
- result = !(mode & UART_RSA_MSR_FIFO);
-
- if (!result) {
- serial_outp(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO);
- mode = serial_inp(up, UART_RSA_MSR);
- result = !(mode & UART_RSA_MSR_FIFO);
- }
-
- if (result)
- up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16;
- spin_unlock_irq(&up->port.lock);
- }
-}
-#endif /* CONFIG_SERIAL_8250_RSA */
-
-static inline void __stop_tx(struct uart_sunsu_port *p)
-{
- if (p->ier & UART_IER_THRI) {
- p->ier &= ~UART_IER_THRI;
- serial_out(p, UART_IER, p->ier);
- }
-}
-
-static void sunsu_stop_tx(struct uart_port *port)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
-
- __stop_tx(up);
-
- /*
- * We really want to stop the transmitter from sending.
- */
- if (up->port.type == PORT_16C950) {
- up->acr |= UART_ACR_TXDIS;
- serial_icr_write(up, UART_ACR, up->acr);
- }
-}
-
-static void sunsu_start_tx(struct uart_port *port)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
-
- if (!(up->ier & UART_IER_THRI)) {
- up->ier |= UART_IER_THRI;
- serial_out(up, UART_IER, up->ier);
- }
-
- /*
- * Re-enable the transmitter if we disabled it.
- */
- if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) {
- up->acr &= ~UART_ACR_TXDIS;
- serial_icr_write(up, UART_ACR, up->acr);
- }
-}
-
-static void sunsu_stop_rx(struct uart_port *port)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
-
- up->ier &= ~UART_IER_RLSI;
- up->port.read_status_mask &= ~UART_LSR_DR;
- serial_out(up, UART_IER, up->ier);
-}
-
-static void sunsu_enable_ms(struct uart_port *port)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
- up->ier |= UART_IER_MSI;
- serial_out(up, UART_IER, up->ier);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static struct tty_struct *
-receive_chars(struct uart_sunsu_port *up, unsigned char *status)
-{
- struct tty_struct *tty = up->port.state->port.tty;
- unsigned char ch, flag;
- int max_count = 256;
- int saw_console_brk = 0;
-
- do {
- ch = serial_inp(up, UART_RX);
- flag = TTY_NORMAL;
- up->port.icount.rx++;
-
- if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
- UART_LSR_FE | UART_LSR_OE))) {
- /*
- * For statistics only
- */
- if (*status & UART_LSR_BI) {
- *status &= ~(UART_LSR_FE | UART_LSR_PE);
- up->port.icount.brk++;
- if (up->port.cons != NULL &&
- up->port.line == up->port.cons->index)
- saw_console_brk = 1;
- /*
- * We do the SysRQ and SAK checking
- * here because otherwise the break
- * may get masked by ignore_status_mask
- * or read_status_mask.
- */
- if (uart_handle_break(&up->port))
- goto ignore_char;
- } else if (*status & UART_LSR_PE)
- up->port.icount.parity++;
- else if (*status & UART_LSR_FE)
- up->port.icount.frame++;
- if (*status & UART_LSR_OE)
- up->port.icount.overrun++;
-
- /*
- * Mask off conditions which should be ingored.
- */
- *status &= up->port.read_status_mask;
-
- if (up->port.cons != NULL &&
- up->port.line == up->port.cons->index) {
- /* Recover the break flag from console xmit */
- *status |= up->lsr_break_flag;
- up->lsr_break_flag = 0;
- }
-
- if (*status & UART_LSR_BI) {
- flag = TTY_BREAK;
- } else if (*status & UART_LSR_PE)
- flag = TTY_PARITY;
- else if (*status & UART_LSR_FE)
- flag = TTY_FRAME;
- }
- if (uart_handle_sysrq_char(&up->port, ch))
- goto ignore_char;
- if ((*status & up->port.ignore_status_mask) == 0)
- tty_insert_flip_char(tty, ch, flag);
- if (*status & UART_LSR_OE)
- /*
- * Overrun is special, since it's reported
- * immediately, and doesn't affect the current
- * character.
- */
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
- ignore_char:
- *status = serial_inp(up, UART_LSR);
- } while ((*status & UART_LSR_DR) && (max_count-- > 0));
-
- if (saw_console_brk)
- sun_do_break();
-
- return tty;
-}
-
-static void transmit_chars(struct uart_sunsu_port *up)
-{
- struct circ_buf *xmit = &up->port.state->xmit;
- int count;
-
- if (up->port.x_char) {
- serial_outp(up, UART_TX, up->port.x_char);
- up->port.icount.tx++;
- up->port.x_char = 0;
- return;
- }
- if (uart_tx_stopped(&up->port)) {
- sunsu_stop_tx(&up->port);
- return;
- }
- if (uart_circ_empty(xmit)) {
- __stop_tx(up);
- return;
- }
-
- count = up->port.fifosize;
- do {
- serial_out(up, UART_TX, xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- up->port.icount.tx++;
- if (uart_circ_empty(xmit))
- break;
- } while (--count > 0);
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&up->port);
-
- if (uart_circ_empty(xmit))
- __stop_tx(up);
-}
-
-static void check_modem_status(struct uart_sunsu_port *up)
-{
- int status;
-
- status = serial_in(up, UART_MSR);
-
- if ((status & UART_MSR_ANY_DELTA) == 0)
- return;
-
- if (status & UART_MSR_TERI)
- up->port.icount.rng++;
- if (status & UART_MSR_DDSR)
- up->port.icount.dsr++;
- if (status & UART_MSR_DDCD)
- uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
- if (status & UART_MSR_DCTS)
- uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
-
- wake_up_interruptible(&up->port.state->port.delta_msr_wait);
-}
-
-static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id)
-{
- struct uart_sunsu_port *up = dev_id;
- unsigned long flags;
- unsigned char status;
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- do {
- struct tty_struct *tty;
-
- status = serial_inp(up, UART_LSR);
- tty = NULL;
- if (status & UART_LSR_DR)
- tty = receive_chars(up, &status);
- check_modem_status(up);
- if (status & UART_LSR_THRE)
- transmit_chars(up);
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- if (tty)
- tty_flip_buffer_push(tty);
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT));
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- return IRQ_HANDLED;
-}
-
-/* Separate interrupt handling path for keyboard/mouse ports. */
-
-static void
-sunsu_change_speed(struct uart_port *port, unsigned int cflag,
- unsigned int iflag, unsigned int quot);
-
-static void sunsu_change_mouse_baud(struct uart_sunsu_port *up)
-{
- unsigned int cur_cflag = up->cflag;
- int quot, new_baud;
-
- up->cflag &= ~CBAUD;
- up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud);
-
- quot = up->port.uartclk / (16 * new_baud);
-
- sunsu_change_speed(&up->port, up->cflag, 0, quot);
-}
-
-static void receive_kbd_ms_chars(struct uart_sunsu_port *up, int is_break)
-{
- do {
- unsigned char ch = serial_inp(up, UART_RX);
-
- /* Stop-A is handled by drivers/char/keyboard.c now. */
- if (up->su_type == SU_PORT_KBD) {
-#ifdef CONFIG_SERIO
- serio_interrupt(&up->serio, ch, 0);
-#endif
- } else if (up->su_type == SU_PORT_MS) {
- int ret = suncore_mouse_baud_detection(ch, is_break);
-
- switch (ret) {
- case 2:
- sunsu_change_mouse_baud(up);
- /* fallthru */
- case 1:
- break;
-
- case 0:
-#ifdef CONFIG_SERIO
- serio_interrupt(&up->serio, ch, 0);
-#endif
- break;
- };
- }
- } while (serial_in(up, UART_LSR) & UART_LSR_DR);
-}
-
-static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id)
-{
- struct uart_sunsu_port *up = dev_id;
-
- if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) {
- unsigned char status = serial_inp(up, UART_LSR);
-
- if ((status & UART_LSR_DR) || (status & UART_LSR_BI))
- receive_kbd_ms_chars(up, (status & UART_LSR_BI) != 0);
- }
-
- return IRQ_HANDLED;
-}
-
-static unsigned int sunsu_tx_empty(struct uart_port *port)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
- unsigned long flags;
- unsigned int ret;
-
- spin_lock_irqsave(&up->port.lock, flags);
- ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- return ret;
-}
-
-static unsigned int sunsu_get_mctrl(struct uart_port *port)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
- unsigned char status;
- unsigned int ret;
-
- status = serial_in(up, UART_MSR);
-
- ret = 0;
- if (status & UART_MSR_DCD)
- ret |= TIOCM_CAR;
- if (status & UART_MSR_RI)
- ret |= TIOCM_RNG;
- if (status & UART_MSR_DSR)
- ret |= TIOCM_DSR;
- if (status & UART_MSR_CTS)
- ret |= TIOCM_CTS;
- return ret;
-}
-
-static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
- unsigned char mcr = 0;
-
- if (mctrl & TIOCM_RTS)
- mcr |= UART_MCR_RTS;
- if (mctrl & TIOCM_DTR)
- mcr |= UART_MCR_DTR;
- if (mctrl & TIOCM_OUT1)
- mcr |= UART_MCR_OUT1;
- if (mctrl & TIOCM_OUT2)
- mcr |= UART_MCR_OUT2;
- if (mctrl & TIOCM_LOOP)
- mcr |= UART_MCR_LOOP;
-
- serial_out(up, UART_MCR, mcr);
-}
-
-static void sunsu_break_ctl(struct uart_port *port, int break_state)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
- if (break_state == -1)
- up->lcr |= UART_LCR_SBC;
- else
- up->lcr &= ~UART_LCR_SBC;
- serial_out(up, UART_LCR, up->lcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static int sunsu_startup(struct uart_port *port)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
- unsigned long flags;
- int retval;
-
- if (up->port.type == PORT_16C950) {
- /* Wake up and initialize UART */
- up->acr = 0;
- serial_outp(up, UART_LCR, 0xBF);
- serial_outp(up, UART_EFR, UART_EFR_ECB);
- serial_outp(up, UART_IER, 0);
- serial_outp(up, UART_LCR, 0);
- serial_icr_write(up, UART_CSR, 0); /* Reset the UART */
- serial_outp(up, UART_LCR, 0xBF);
- serial_outp(up, UART_EFR, UART_EFR_ECB);
- serial_outp(up, UART_LCR, 0);
- }
-
-#ifdef CONFIG_SERIAL_8250_RSA
- /*
- * If this is an RSA port, see if we can kick it up to the
- * higher speed clock.
- */
- enable_rsa(up);
-#endif
-
- /*
- * Clear the FIFO buffers and disable them.
- * (they will be reenabled in set_termios())
- */
- if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) {
- serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
- serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
- serial_outp(up, UART_FCR, 0);
- }
-
- /*
- * Clear the interrupt registers.
- */
- (void) serial_inp(up, UART_LSR);
- (void) serial_inp(up, UART_RX);
- (void) serial_inp(up, UART_IIR);
- (void) serial_inp(up, UART_MSR);
-
- /*
- * At this point, there's no way the LSR could still be 0xff;
- * if it is, then bail out, because there's likely no UART
- * here.
- */
- if (!(up->port.flags & UPF_BUGGY_UART) &&
- (serial_inp(up, UART_LSR) == 0xff)) {
- printk("ttyS%d: LSR safety check engaged!\n", up->port.line);
- return -ENODEV;
- }
-
- if (up->su_type != SU_PORT_PORT) {
- retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt,
- IRQF_SHARED, su_typev[up->su_type], up);
- } else {
- retval = request_irq(up->port.irq, sunsu_serial_interrupt,
- IRQF_SHARED, su_typev[up->su_type], up);
- }
- if (retval) {
- printk("su: Cannot register IRQ %d\n", up->port.irq);
- return retval;
- }
-
- /*
- * Now, initialize the UART
- */
- serial_outp(up, UART_LCR, UART_LCR_WLEN8);
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- up->port.mctrl |= TIOCM_OUT2;
-
- sunsu_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /*
- * Finally, enable interrupts. Note: Modem status interrupts
- * are set via set_termios(), which will be occurring imminently
- * anyway, so we don't enable them here.
- */
- up->ier = UART_IER_RLSI | UART_IER_RDI;
- serial_outp(up, UART_IER, up->ier);
-
- if (up->port.flags & UPF_FOURPORT) {
- unsigned int icp;
- /*
- * Enable interrupts on the AST Fourport board
- */
- icp = (up->port.iobase & 0xfe0) | 0x01f;
- outb_p(0x80, icp);
- (void) inb_p(icp);
- }
-
- /*
- * And clear the interrupt registers again for luck.
- */
- (void) serial_inp(up, UART_LSR);
- (void) serial_inp(up, UART_RX);
- (void) serial_inp(up, UART_IIR);
- (void) serial_inp(up, UART_MSR);
-
- return 0;
-}
-
-static void sunsu_shutdown(struct uart_port *port)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
- unsigned long flags;
-
- /*
- * Disable interrupts from this port
- */
- up->ier = 0;
- serial_outp(up, UART_IER, 0);
-
- spin_lock_irqsave(&up->port.lock, flags);
- if (up->port.flags & UPF_FOURPORT) {
- /* reset interrupts on the AST Fourport board */
- inb((up->port.iobase & 0xfe0) | 0x1f);
- up->port.mctrl |= TIOCM_OUT1;
- } else
- up->port.mctrl &= ~TIOCM_OUT2;
-
- sunsu_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /*
- * Disable break condition and FIFOs
- */
- serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC);
- serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT);
- serial_outp(up, UART_FCR, 0);
-
-#ifdef CONFIG_SERIAL_8250_RSA
- /*
- * Reset the RSA board back to 115kbps compat mode.
- */
- disable_rsa(up);
-#endif
-
- /*
- * Read data port to reset things.
- */
- (void) serial_in(up, UART_RX);
-
- free_irq(up->port.irq, up);
-}
-
-static void
-sunsu_change_speed(struct uart_port *port, unsigned int cflag,
- unsigned int iflag, unsigned int quot)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
- unsigned char cval, fcr = 0;
- unsigned long flags;
-
- switch (cflag & CSIZE) {
- case CS5:
- cval = 0x00;
- break;
- case CS6:
- cval = 0x01;
- break;
- case CS7:
- cval = 0x02;
- break;
- default:
- case CS8:
- cval = 0x03;
- break;
- }
-
- if (cflag & CSTOPB)
- cval |= 0x04;
- if (cflag & PARENB)
- cval |= UART_LCR_PARITY;
- if (!(cflag & PARODD))
- cval |= UART_LCR_EPAR;
-#ifdef CMSPAR
- if (cflag & CMSPAR)
- cval |= UART_LCR_SPAR;
-#endif
-
- /*
- * Work around a bug in the Oxford Semiconductor 952 rev B
- * chip which causes it to seriously miscalculate baud rates
- * when DLL is 0.
- */
- if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 &&
- up->rev == 0x5201)
- quot ++;
-
- if (uart_config[up->port.type].flags & UART_USE_FIFO) {
- if ((up->port.uartclk / quot) < (2400 * 16))
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
-#ifdef CONFIG_SERIAL_8250_RSA
- else if (up->port.type == PORT_RSA)
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14;
-#endif
- else
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
- }
- if (up->port.type == PORT_16750)
- fcr |= UART_FCR7_64BYTE;
-
- /*
- * Ok, we're now changing the port state. Do it with
- * interrupts disabled.
- */
- spin_lock_irqsave(&up->port.lock, flags);
-
- /*
- * Update the per-port timeout.
- */
- uart_update_timeout(port, cflag, (port->uartclk / (16 * quot)));
-
- up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
- if (iflag & INPCK)
- up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (iflag & (BRKINT | PARMRK))
- up->port.read_status_mask |= UART_LSR_BI;
-
- /*
- * Characteres to ignore
- */
- up->port.ignore_status_mask = 0;
- if (iflag & IGNPAR)
- up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
- if (iflag & IGNBRK) {
- up->port.ignore_status_mask |= UART_LSR_BI;
- /*
- * If we're ignoring parity and break indicators,
- * ignore overruns too (for real raw support).
- */
- if (iflag & IGNPAR)
- up->port.ignore_status_mask |= UART_LSR_OE;
- }
-
- /*
- * ignore all characters if CREAD is not set
- */
- if ((cflag & CREAD) == 0)
- up->port.ignore_status_mask |= UART_LSR_DR;
-
- /*
- * CTS flow control flag and modem status interrupts
- */
- up->ier &= ~UART_IER_MSI;
- if (UART_ENABLE_MS(&up->port, cflag))
- up->ier |= UART_IER_MSI;
-
- serial_out(up, UART_IER, up->ier);
-
- if (uart_config[up->port.type].flags & UART_STARTECH) {
- serial_outp(up, UART_LCR, 0xBF);
- serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0);
- }
- serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
- serial_outp(up, UART_DLL, quot & 0xff); /* LS of divisor */
- serial_outp(up, UART_DLM, quot >> 8); /* MS of divisor */
- if (up->port.type == PORT_16750)
- serial_outp(up, UART_FCR, fcr); /* set fcr */
- serial_outp(up, UART_LCR, cval); /* reset DLAB */
- up->lcr = cval; /* Save LCR */
- if (up->port.type != PORT_16750) {
- if (fcr & UART_FCR_ENABLE_FIFO) {
- /* emulated UARTs (Lucent Venus 167x) need two steps */
- serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
- }
- serial_outp(up, UART_FCR, fcr); /* set fcr */
- }
-
- up->cflag = cflag;
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static void
-sunsu_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
-{
- unsigned int baud, quot;
-
- /*
- * 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);
-
- sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot);
-}
-
-static void sunsu_release_port(struct uart_port *port)
-{
-}
-
-static int sunsu_request_port(struct uart_port *port)
-{
- return 0;
-}
-
-static void sunsu_config_port(struct uart_port *port, int flags)
-{
- struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
-
- if (flags & UART_CONFIG_TYPE) {
- /*
- * We are supposed to call autoconfig here, but this requires
- * splitting all the OBP probing crap from the UART probing.
- * We'll do it when we kill sunsu.c altogether.
- */
- port->type = up->type_probed; /* XXX */
- }
-}
-
-static int
-sunsu_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
- return -EINVAL;
-}
-
-static const char *
-sunsu_type(struct uart_port *port)
-{
- int type = port->type;
-
- if (type >= ARRAY_SIZE(uart_config))
- type = 0;
- return uart_config[type].name;
-}
-
-static struct uart_ops sunsu_pops = {
- .tx_empty = sunsu_tx_empty,
- .set_mctrl = sunsu_set_mctrl,
- .get_mctrl = sunsu_get_mctrl,
- .stop_tx = sunsu_stop_tx,
- .start_tx = sunsu_start_tx,
- .stop_rx = sunsu_stop_rx,
- .enable_ms = sunsu_enable_ms,
- .break_ctl = sunsu_break_ctl,
- .startup = sunsu_startup,
- .shutdown = sunsu_shutdown,
- .set_termios = sunsu_set_termios,
- .type = sunsu_type,
- .release_port = sunsu_release_port,
- .request_port = sunsu_request_port,
- .config_port = sunsu_config_port,
- .verify_port = sunsu_verify_port,
-};
-
-#define UART_NR 4
-
-static struct uart_sunsu_port sunsu_ports[UART_NR];
-
-#ifdef CONFIG_SERIO
-
-static DEFINE_SPINLOCK(sunsu_serio_lock);
-
-static int sunsu_serio_write(struct serio *serio, unsigned char ch)
-{
- struct uart_sunsu_port *up = serio->port_data;
- unsigned long flags;
- int lsr;
-
- spin_lock_irqsave(&sunsu_serio_lock, flags);
-
- do {
- lsr = serial_in(up, UART_LSR);
- } while (!(lsr & UART_LSR_THRE));
-
- /* Send the character out. */
- serial_out(up, UART_TX, ch);
-
- spin_unlock_irqrestore(&sunsu_serio_lock, flags);
-
- return 0;
-}
-
-static int sunsu_serio_open(struct serio *serio)
-{
- struct uart_sunsu_port *up = serio->port_data;
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&sunsu_serio_lock, flags);
- if (!up->serio_open) {
- up->serio_open = 1;
- ret = 0;
- } else
- ret = -EBUSY;
- spin_unlock_irqrestore(&sunsu_serio_lock, flags);
-
- return ret;
-}
-
-static void sunsu_serio_close(struct serio *serio)
-{
- struct uart_sunsu_port *up = serio->port_data;
- unsigned long flags;
-
- spin_lock_irqsave(&sunsu_serio_lock, flags);
- up->serio_open = 0;
- spin_unlock_irqrestore(&sunsu_serio_lock, flags);
-}
-
-#endif /* CONFIG_SERIO */
-
-static void sunsu_autoconfig(struct uart_sunsu_port *up)
-{
- unsigned char status1, status2, scratch, scratch2, scratch3;
- unsigned char save_lcr, save_mcr;
- unsigned long flags;
-
- if (up->su_type == SU_PORT_NONE)
- return;
-
- up->type_probed = PORT_UNKNOWN;
- up->port.iotype = UPIO_MEM;
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- if (!(up->port.flags & UPF_BUGGY_UART)) {
- /*
- * Do a simple existence test first; if we fail this, there's
- * no point trying anything else.
- *
- * 0x80 is used as a nonsense port to prevent against false
- * positives due to ISA bus float. The assumption is that
- * 0x80 is a non-existent port; which should be safe since
- * include/asm/io.h also makes this assumption.
- */
- scratch = serial_inp(up, UART_IER);
- serial_outp(up, UART_IER, 0);
-#ifdef __i386__
- outb(0xff, 0x080);
-#endif
- scratch2 = serial_inp(up, UART_IER);
- serial_outp(up, UART_IER, 0x0f);
-#ifdef __i386__
- outb(0, 0x080);
-#endif
- scratch3 = serial_inp(up, UART_IER);
- serial_outp(up, UART_IER, scratch);
- if (scratch2 != 0 || scratch3 != 0x0F)
- goto out; /* We failed; there's nothing here */
- }
-
- save_mcr = serial_in(up, UART_MCR);
- save_lcr = serial_in(up, UART_LCR);
-
- /*
- * Check to see if a UART is really there. Certain broken
- * internal modems based on the Rockwell chipset fail this
- * test, because they apparently don't implement the loopback
- * test mode. So this test is skipped on the COM 1 through
- * COM 4 ports. This *should* be safe, since no board
- * manufacturer would be stupid enough to design a board
- * that conflicts with COM 1-4 --- we hope!
- */
- if (!(up->port.flags & UPF_SKIP_TEST)) {
- serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A);
- status1 = serial_inp(up, UART_MSR) & 0xF0;
- serial_outp(up, UART_MCR, save_mcr);
- if (status1 != 0x90)
- goto out; /* We failed loopback test */
- }
- serial_outp(up, UART_LCR, 0xBF); /* set up for StarTech test */
- serial_outp(up, UART_EFR, 0); /* EFR is the same as FCR */
- serial_outp(up, UART_LCR, 0);
- serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
- scratch = serial_in(up, UART_IIR) >> 6;
- switch (scratch) {
- case 0:
- up->port.type = PORT_16450;
- break;
- case 1:
- up->port.type = PORT_UNKNOWN;
- break;
- case 2:
- up->port.type = PORT_16550;
- break;
- case 3:
- up->port.type = PORT_16550A;
- break;
- }
- if (up->port.type == PORT_16550A) {
- /* Check for Startech UART's */
- serial_outp(up, UART_LCR, UART_LCR_DLAB);
- if (serial_in(up, UART_EFR) == 0) {
- up->port.type = PORT_16650;
- } else {
- serial_outp(up, UART_LCR, 0xBF);
- if (serial_in(up, UART_EFR) == 0)
- up->port.type = PORT_16650V2;
- }
- }
- if (up->port.type == PORT_16550A) {
- /* Check for TI 16750 */
- serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB);
- serial_outp(up, UART_FCR,
- UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
- scratch = serial_in(up, UART_IIR) >> 5;
- if (scratch == 7) {
- /*
- * If this is a 16750, and not a cheap UART
- * clone, then it should only go into 64 byte
- * mode if the UART_FCR7_64BYTE bit was set
- * while UART_LCR_DLAB was latched.
- */
- serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
- serial_outp(up, UART_LCR, 0);
- serial_outp(up, UART_FCR,
- UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
- scratch = serial_in(up, UART_IIR) >> 5;
- if (scratch == 6)
- up->port.type = PORT_16750;
- }
- serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
- }
- serial_outp(up, UART_LCR, save_lcr);
- if (up->port.type == PORT_16450) {
- scratch = serial_in(up, UART_SCR);
- serial_outp(up, UART_SCR, 0xa5);
- status1 = serial_in(up, UART_SCR);
- serial_outp(up, UART_SCR, 0x5a);
- status2 = serial_in(up, UART_SCR);
- serial_outp(up, UART_SCR, scratch);
-
- if ((status1 != 0xa5) || (status2 != 0x5a))
- up->port.type = PORT_8250;
- }
-
- up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size;
-
- if (up->port.type == PORT_UNKNOWN)
- goto out;
- up->type_probed = up->port.type; /* XXX */
-
- /*
- * Reset the UART.
- */
-#ifdef CONFIG_SERIAL_8250_RSA
- if (up->port.type == PORT_RSA)
- serial_outp(up, UART_RSA_FRR, 0);
-#endif
- serial_outp(up, UART_MCR, save_mcr);
- serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT));
- serial_outp(up, UART_FCR, 0);
- (void)serial_in(up, UART_RX);
- serial_outp(up, UART_IER, 0);
-
-out:
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static struct uart_driver sunsu_reg = {
- .owner = T