+++ /dev/null
-/*
-<:copyright-gpl
- Copyright 2002 Broadcom Corp. All Rights Reserved.
-
- This program is free software; you can distribute it and/or modify it
- under the terms of the GNU General Public License (Version 2) as
- published by the Free Software Foundation.
-
- This program is distributed in the hope 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.
-:>
-*/
-
-/* Description: Serial port driver for the BCM963XX. */
-
-#define CARDNAME "bcm963xx_serial driver"
-#define VERSION "2.0"
-#define VER_STR CARDNAME " v" VERSION "\n"
-
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/version.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-
-/* for definition of struct console */
-#include <linux/console.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <asm/uaccess.h>
-
-#include <bcmtypes.h>
-#include <board.h>
-#include <bcm_map_part.h>
-#include <bcm_intr.h>
-#include <6348_map_part.h>
-#include <6348_intr.h>
-
-static DEFINE_SPINLOCK(bcm963xx_serial_lock);
-
-extern void _putc(char);
-extern void _puts(const char *);
-
-typedef struct bcm_serial {
- volatile Uart *port;
- int type;
- int flags;
- int irq;
- int baud_base;
- int blocked_open;
- unsigned short close_delay;
- unsigned short closing_wait;
- unsigned short line; /* port/line number */
- unsigned short cflags; /* line configuration flag */
- unsigned short x_char; /* xon/xoff character */
- unsigned short read_status_mask; /* mask for read condition */
- unsigned short ignore_status_mask; /* mask for ignore condition */
- unsigned long event; /* mask used in BH */
- int xmit_head; /* Position of the head */
- int xmit_tail; /* Position of the tail */
- int xmit_cnt; /* Count of the chars in the buffer */
- int count; /* indicates how many times it has been opened */
- int magic;
-
- struct async_icount icount; /* keep track of things ... */
- struct tty_struct *tty; /* tty associated */
- struct ktermios normal_termios;
-
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
-
- long session; /* Session of opening process */
- long pgrp; /* pgrp of opening process */
-
- unsigned char is_initialized;
-} Context;
-
-
-/*---------------------------------------------------------------------*/
-/* Define bits in the Interrupt Enable register */
-/*---------------------------------------------------------------------*/
-/* Enable receive interrupt */
-#define RXINT (RXFIFONE|RXOVFERR)
-
-/* Enable transmit interrupt */
-#define TXINT (TXFIFOEMT|TXUNDERR|TXOVFERR)
-
-/* Enable receiver line status interrupt */
-#define LSINT (RXBRK|RXPARERR|RXFRAMERR)
-
-#define BCM_NUM_UARTS 1
-
-#define BD_BCM63XX_TIMER_CLOCK_INPUT (FPERIPH)
-
-
-static struct bcm_serial multi[BCM_NUM_UARTS];
-static struct bcm_serial *lines[BCM_NUM_UARTS];
-static struct tty_driver *serial_driver;
-static struct ktermios *serial_termios[BCM_NUM_UARTS];
-static struct ktermios *serial_termios_locked[BCM_NUM_UARTS];
-
-
-static void bcm_stop(struct tty_struct *tty);
-static void bcm_start(struct tty_struct *tty);
-static inline void receive_chars(struct bcm_serial *info);
-static int startup(struct bcm_serial *info);
-static void shutdown(struct bcm_serial *info);
-static void change_speed(volatile Uart * pUart, tcflag_t cFlag);
-static void bcm63xx_cons_flush_chars(struct tty_struct *tty);
-static int bcm63xx_cons_write(struct tty_struct *tty,
- const unsigned char *buf, int count);
-static int bcm63xx_cons_write_room(struct tty_struct *tty);
-static int bcm_chars_in_buffer(struct tty_struct *tty);
-static void bcm_flush_buffer(struct tty_struct *tty);
-static void bcm_throttle(struct tty_struct *tty);
-static void bcm_unthrottle(struct tty_struct *tty);
-static void bcm_send_xchar(struct tty_struct *tty, char ch);
-static int get_serial_info(struct bcm_serial *info,
- struct serial_struct *retinfo);
-static int set_serial_info(struct bcm_serial *info,
- struct serial_struct *new_info);
-static int get_lsr_info(struct bcm_serial *info, unsigned int *value);
-static void send_break(struct bcm_serial *info, int duration);
-static int bcm_ioctl(struct tty_struct *tty, struct file *file,
- unsigned int cmd, unsigned long arg);
-static void bcm_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios);
-static void bcm63xx_cons_close(struct tty_struct *tty, struct file *filp);
-static void bcm_hangup(struct tty_struct *tty);
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
- struct bcm_serial *info);
-static int bcm63xx_cons_open(struct tty_struct *tty, struct file *filp);
-static int __init bcm63xx_serialinit(void);
-
-
-/*
- * ------------------------------------------------------------
- * rs_stop () and rs_start ()
- *
- * These routines are called before setting or resetting
- * tty->stopped. They enable or disable transmitter interrupts,
- * as necessary.
- * ------------------------------------------------------------
- */
-static void bcm_stop(struct tty_struct *tty)
-{
-}
-
-static void bcm_start(struct tty_struct *tty)
-{
- _puts(CARDNAME " Start\n");
-}
-
-/*
- * ------------------------------------------------------------
- * receive_char ()
- *
- * This routine deals with inputs from any lines.
- * ------------------------------------------------------------
- */
-static inline void receive_chars(struct bcm_serial *info)
-{
- struct tty_struct *tty = 0;
- struct async_icount *icount;
- int ignore = 0;
- unsigned short status, tmp;
- UCHAR ch = 0;
- while ((status = info->port->intStatus) & RXINT) {
- char flag_char = TTY_NORMAL;
-
- if (status & RXFIFONE)
- ch = info->port->Data; // Read the character
- tty = info->tty; /* now tty points to the proper dev */
- icount = &info->icount;
- if (!tty)
- break;
- if (!tty_buffer_request_room(tty, 1))
- break;
- icount->rx++;
- if (status & RXBRK) {
- flag_char = TTY_BREAK;
- icount->brk++;
- }
- // keep track of the statistics
- if (status & (RXFRAMERR | RXPARERR | RXOVFERR)) {
- if (status & RXPARERR) /* parity error */
- icount->parity++;
- else if (status & RXFRAMERR) /* frame error */
- icount->frame++;
- if (status & RXOVFERR) {
- // Overflow. Reset the RX FIFO
- info->port->fifoctl |= RSTRXFIFOS;
- icount->overrun++;
- }
- // check to see if we should ignore the character
- // and mask off conditions that should be ignored
- if (status & info->ignore_status_mask) {
- if (++ignore > 100)
- break;
- goto ignore_char;
- }
- // Mask off the error conditions we want to ignore
- tmp = status & info->read_status_mask;
- if (tmp & RXPARERR) {
- flag_char = TTY_PARITY;
- } else if (tmp & RXFRAMERR) {
- flag_char = TTY_FRAME;
- }
- if (tmp & RXOVFERR) {
- tty_insert_flip_char(tty, ch, flag_char);
- ch = 0;
- flag_char = TTY_OVERRUN;
- if (!tty_buffer_request_room(tty, 1))
- break;
- }
- }
- tty_insert_flip_char(tty, ch, flag_char);
- }
- ignore_char:;
- tty_flip_buffer_push(tty);
- tty_schedule_flip(tty);
-
-}
-
-
-/*
- * ------------------------------------------------------------
- * bcm_interrupt ()
- *
- * this is the main interrupt routine for the chip.
- * It deals with the multiple ports.
- * ------------------------------------------------------------
- */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-static irqreturn_t bcm_interrupt(int irq, void *dev)
-#else
-static void bcm_interrupt(int irq, void *dev, struct pt_regs *regs)
-#endif
-{
- struct bcm_serial *info = lines[0];
- UINT16 intStat;
-
- /* get pending interrupt flags from UART */
-
- /* Mask with only the serial interrupts that are enabled */
- intStat = info->port->intStatus & info->port->intMask;
- while (intStat) {
- if (intStat & RXINT)
- receive_chars(info);
- else if (intStat & TXINT)
- info->port->intStatus = TXINT;
- else /* don't know what it was, so let's mask it */
- info->port->intMask &= ~intStat;
-
- intStat = info->port->intStatus & info->port->intMask;
- }
-
- // Clear the interrupt
- enable_brcm_irq(INTERRUPT_ID_UART);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
- return IRQ_HANDLED;
-#endif
-}
-
-/*
- * -------------------------------------------------------------------
- * startup ()
- *
- * various initialization tasks
- * -------------------------------------------------------------------
- */
-static int startup(struct bcm_serial *info)
-{
- // Port is already started...
- return 0;
-}
-
-/*
- * -------------------------------------------------------------------
- * shutdown ()
- *
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- * -------------------------------------------------------------------
- */
-static void shutdown(struct bcm_serial *info)
-{
- unsigned long flags;
- if (!info->is_initialized)
- return;
-
- spin_lock_irqsave(&bcm963xx_serial_lock, flags);
-
- info->port->control &= ~(BRGEN | TXEN | RXEN);
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
- info->is_initialized = 0;
-
- spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
-}
-
-/*
- * -------------------------------------------------------------------
- * change_speed ()
- *
- * Set the baud rate, character size, parity and stop bits.
- * -------------------------------------------------------------------
- */
-static void change_speed(volatile Uart * pUart, tcflag_t cFlag)
-{
- unsigned long ulFlags, ulBaud, ulClockFreqHz, ulTmp;
-
- spin_lock_irqsave(&bcm963xx_serial_lock, ulFlags);
- switch (cFlag & (CBAUD | CBAUDEX)) {
- case B115200:
- ulBaud = 115200;
- break;
- case B57600:
- ulBaud = 57600;
- break;
- case B38400:
- ulBaud = 38400;
- break;
- case B19200:
- ulBaud = 19200;
- break;
- case B9600:
- ulBaud = 9600;
- break;
- case B4800:
- ulBaud = 4800;
- break;
- case B2400:
- ulBaud = 2400;
- break;
- case B1800:
- ulBaud = 1800;
- break;
- case B1200:
- ulBaud = 1200;
- break;
- case B600:
- ulBaud = 600;
- break;
- case B300:
- ulBaud = 300;
- break;
- case B200:
- ulBaud = 200;
- break;
- case B150:
- ulBaud = 150;
- break;
- case B134:
- ulBaud = 134;
- break;
- case B110:
- ulBaud = 110;
- break;
- case B75:
- ulBaud = 75;
- break;
- case B50:
- ulBaud = 50;
- break;
- default:
- ulBaud = 115200;
- break;
- }
-
- /* Calculate buad rate. */
- ulClockFreqHz = BD_BCM63XX_TIMER_CLOCK_INPUT;
- ulTmp = (ulClockFreqHz / ulBaud) / 16;
- if (ulTmp & 0x01)
- ulTmp /= 2; /* Rounding up, so sub is already accounted for */
- else
- ulTmp = (ulTmp / 2) - 1; /* Rounding down so we must sub 1 */
- pUart->baudword = ulTmp;
-
- /* Set character size, stop bits and parity. */
- switch (cFlag & CSIZE) {
- case CS5:
- ulTmp = BITS5SYM; /* select transmit 5 bit data size */
- break;
- case CS6:
- ulTmp = BITS6SYM; /* select transmit 6 bit data size */
- break;
- case CS7:
- ulTmp = BITS7SYM; /* select transmit 7 bit data size */
- break;
- default:
- ulTmp = BITS8SYM; /* select transmit 8 bit data size */
- break;
- }
- if (cFlag & CSTOPB)
- ulTmp |= TWOSTOP; /* select 2 stop bits */
- else
- ulTmp |= ONESTOP; /* select one stop bit */
-
- /* Write these values into the config reg. */
- pUart->config = ulTmp;
- pUart->control &=
- ~(RXPARITYEN | TXPARITYEN | RXPARITYEVEN | TXPARITYEVEN);
- switch (cFlag & (PARENB | PARODD)) {
- case PARENB | PARODD:
- pUart->control |= RXPARITYEN | TXPARITYEN;
- break;
- case PARENB:
- pUart->control |=
- RXPARITYEN | TXPARITYEN | RXPARITYEVEN | TXPARITYEVEN;
- break;
- default:
- pUart->control |= 0;
- break;
- }
-
- /* Reset and flush uart */
- pUart->fifoctl = RSTTXFIFOS | RSTRXFIFOS;
- spin_unlock_irqrestore(&bcm963xx_serial_lock, ulFlags);
-}
-
-
-/*
- * -------------------------------------------------------------------
- * bcm_flush_char ()
- *
- * Nothing to flush. Polled I/O is used.
- * -------------------------------------------------------------------
- */
-static void bcm63xx_cons_flush_chars(struct tty_struct *tty)
-{
-}
-
-
-/*
- * -------------------------------------------------------------------
- * bcm63xx_cons_write ()
- *
- * Main output routine using polled I/O.
- * -------------------------------------------------------------------
- */
-static int bcm63xx_cons_write(struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
- int c;
-
- for (c = 0; c < count; c++)
- _putc(buf[c]);
- return count;
-}
-
-/*
- * -------------------------------------------------------------------
- * bcm63xx_cons_write_room ()
- *
- * Compute the amount of space available for writing.
- * -------------------------------------------------------------------
- */
-static int bcm63xx_cons_write_room(struct tty_struct *tty)
-{
- /* Pick a number. Any number. Polled I/O is used. */
- return 1024;
-}
-
-/*
- * -------------------------------------------------------------------
- * bcm_chars_in_buffer ()
- *
- * compute the amount of char left to be transmitted
- * -------------------------------------------------------------------
- */
-static int bcm_chars_in_buffer(struct tty_struct *tty)
-{
- return 0;
-}
-
-/*
- * -------------------------------------------------------------------
- * bcm_flush_buffer ()
- *
- * Empty the output buffer
- * -------------------------------------------------------------------
- */
-static void bcm_flush_buffer(struct tty_struct *tty)
-{
- tty_wakeup(tty);
-}
-
-/*
- * ------------------------------------------------------------
- * bcm_throttle () and bcm_unthrottle ()
- *
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled (or not).
- * ------------------------------------------------------------
- */
-static void bcm_throttle(struct tty_struct *tty)
-{
- struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
- if (I_IXOFF(tty))
- info->x_char = STOP_CHAR(tty);
-}
-
-static void bcm_unthrottle(struct tty_struct *tty)
-{
- struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- info->x_char = START_CHAR(tty);
- }
-}
-
-static void bcm_send_xchar(struct tty_struct *tty, char ch)
-{
- struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
- info->x_char = ch;
- if (ch)
- bcm_start(info->tty);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl () and friends
- * ------------------------------------------------------------
- */
-static int get_serial_info(struct bcm_serial *info,
- struct serial_struct *retinfo)
-{
- struct serial_struct tmp;
-
- if (!retinfo)
- return -EFAULT;
-
- memset(&tmp, 0, sizeof(tmp));
- tmp.type = info->type;
- tmp.line = info->line;
- tmp.port = (int) info->port;
- tmp.irq = info->irq;
- tmp.flags = 0;
- tmp.baud_base = info->baud_base;
- tmp.close_delay = info->close_delay;
- tmp.closing_wait = info->closing_wait;
-
- return copy_to_user(retinfo, &tmp, sizeof(*retinfo));
-}
-
-static int set_serial_info(struct bcm_serial *info,
- struct serial_struct *new_info)
-{
- struct serial_struct new_serial;
- struct bcm_serial old_info;
- int retval = 0;
-
- if (!new_info)
- return -EFAULT;
-
- copy_from_user(&new_serial, new_info, sizeof(new_serial));
- old_info = *info;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
-
- if (info->count > 1)
- return -EBUSY;
-
- /* OK, past this point, all the error checking has been done.
- * At this point, we start making changes.....
- */
- info->baud_base = new_serial.baud_base;
- info->type = new_serial.type;
- info->close_delay = new_serial.close_delay;
- info->closing_wait = new_serial.closing_wait;
- retval = startup(info);
- return retval;
-}
-
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int get_lsr_info(struct bcm_serial *info, unsigned int *value)
-{
- return (0);
-}
-
-/*
- * This routine sends a break character out the serial port.
- */
-static void send_break(struct bcm_serial *info, int duration)
-{
- unsigned long flags;
-
- if (!info->port)
- return;
-
- current->state = TASK_INTERRUPTIBLE;
-
- /*save_flags (flags);
- cli(); */
- spin_lock_irqsave(&bcm963xx_serial_lock, flags);
-
- info->port->control |= XMITBREAK;
- schedule_timeout(duration);
- info->port->control &= ~XMITBREAK;
-
- spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
- //restore_flags (flags);
-}
-
-static int bcm_ioctl(struct tty_struct *tty, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int error;
- struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
- int retval;
-
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
- (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
- switch (cmd) {
-
- case TCSBRK: /* SVID version: non-zero arg --> no break */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (!arg)
- send_break(info, HZ / 4); /* 1/4 second */
- return 0;
-
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
- return 0;
-
- case TIOCGSOFTCAR:
- error =
- access_ok(VERIFY_WRITE, (void *) arg, sizeof(long));
- if (!error)
- return -EFAULT;
- else {
- put_user(C_CLOCAL(tty) ? 1 : 0,
- (unsigned long *) arg);
- return 0;
- }
-
- case TIOCSSOFTCAR:
- error = get_user(arg, (unsigned long *) arg);
- if (error)
- return error;
- tty->termios->c_cflag =
- ((tty->termios->
- c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
- return 0;
-
- case TIOCGSERIAL:
- error =
- access_ok(VERIFY_WRITE, (void *) arg,
- sizeof(struct serial_struct));
- if (!error)
- return -EFAULT;
- else
- return get_serial_info(info,
- (struct serial_struct *)
- arg);
-
- case TIOCSSERIAL:
- return set_serial_info(info, (struct serial_struct *) arg);
-
- case TIOCSERGETLSR: /* Get line status register */
- error =
- access_ok(VERIFY_WRITE, (void *) arg,
- sizeof(unsigned int));
- if (!error)
- return -EFAULT;
- else
- return get_lsr_info(info, (unsigned int *) arg);
-
- case TIOCSERGSTRUCT:
- error =
- access_ok(VERIFY_WRITE, (void *) arg,
- sizeof(struct bcm_serial));
- if (!error)
- return -EFAULT;
- else {
- copy_to_user((struct bcm_serial *) arg, info,
- sizeof(struct bcm_serial));
- return 0;
- }
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-static void bcm_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
-{
- struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
-
- if (tty->termios->c_cflag != old_termios->c_cflag)
- change_speed(info->port, tty->termios->c_cflag);
-}
-
-/*
- * ------------------------------------------------------------
- * bcm63xx_cons_close()
- *
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we turn off
- * the transmit enable and receive enable flags.
- * ------------------------------------------------------------
- */
-static void bcm63xx_cons_close(struct tty_struct *tty, struct file *filp)
-{
- struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
- unsigned long flags;
-
- if (!info)
- return;
-
- /*save_flags (flags);
- cli(); */
- spin_lock_irqsave(&bcm963xx_serial_lock, flags);
-
- if (tty_hung_up_p(filp)) {
- spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
- //restore_flags (flags);
- return;
- }
-
- if ((tty->count == 1) && (info->count != 1)) {
-
- /* Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. Info->count should always
- * be one in these conditions. If it's greater than
- * one, we've got real problems, since it means the
- * serial port won't be shutdown.
- */
- printk
- ("bcm63xx_cons_close: bad serial port count; tty->count is 1, "
- "info->count is %d\n", info->count);
- info->count = 1;
- }
-
- if (--info->count < 0) {
- printk("ds_close: bad serial port count for ttys%d: %d\n",
- info->line, info->count);
- info->count = 0;
- }
-
- if (info->count) {
- //restore_flags (flags);
- spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
- return;
- }
-
- /* Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- tty->closing = 1;
-
- /* At this point we stop accepting input. To do this, we
- * disable the receive line status interrupts.
- */
- shutdown(info);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
-#else
- if (tty->driver.flush_buffer)
- tty->driver.flush_buffer(tty);
-#endif
- if (tty->ldisc.flush_buffer)
- tty->ldisc.flush_buffer(tty);
-
- tty->closing = 0;
- info->event = 0;
- info->tty = 0;
- if (tty->ldisc.num != tty_ldisc_get(N_TTY)->num) {
- if (tty->ldisc.close)
- (tty->ldisc.close) (tty);
- tty->ldisc = *tty_ldisc_get(N_TTY);
- tty->termios->c_line = N_TTY;
- if (tty->ldisc.open)
- (tty->ldisc.open) (tty);
- }
- if (info->blocked_open) {
- if (info->close_delay) {
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(info->close_delay);
- }
- wake_up_interruptible(&info->open_wait);
- }
- wake_up_interruptible(&info->close_wait);
-
- //restore_flags (flags);
- spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
-}
-
-/*
- * bcm_hangup () --- called by tty_hangup() when a hangup is signaled.
- */
-static void bcm_hangup(struct tty_struct *tty)
-{
-
- struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
-
- shutdown(info);
- info->event = 0;
- info->count = 0;
- info->tty = 0;
- wake_up_interruptible(&info->open_wait);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
- struct bcm_serial *info)
-{
- return 0;
-}
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port. It also performs the
- * serial-specific initialization for the tty structure.
- */
-static int bcm63xx_cons_open(struct tty_struct *tty, struct file *filp)
-{
- struct bcm_serial *info;
- int retval, line;
-
- // Make sure we're only opening on of the ports we support
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
- line = MINOR(tty->driver->cdev.dev) - tty->driver->minor_start;
-#else
- line = MINOR(tty->device) - tty->driver.minor_start;
-#endif
-
- if ((line < 0) || (line >= BCM_NUM_UARTS))
- return -ENODEV;
-
- info = lines[line];
-
- tty->low_latency = 1;
- info->port->intMask = 0; /* Clear any pending interrupts */
- info->port->intMask = RXINT; /* Enable RX */
-
- info->count++;
- tty->driver_data = info;
- info->tty = tty;
- enable_brcm_irq(INTERRUPT_ID_UART);
-
- // Start up serial port
- retval = startup(info);
- if (retval)
- return retval;
-
- retval = block_til_ready(tty, filp, info);
- if (retval)
- return retval;
-
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
- info->pgrp = process_group(current);
-#else
- info->session = current->session;
- info->pgrp = current->pgrp;
-#endif
-
- return 0;
-}
-
-
-static struct tty_operations rs_ops = {
- .open = bcm63xx_cons_open,
- .close = bcm63xx_cons_close,
- .write = bcm63xx_cons_write,
- .flush_chars = bcm63xx_cons_flush_chars,
- .write_room = bcm63xx_cons_write_room,
- .chars_in_buffer = bcm_chars_in_buffer,
- .flush_buffer = bcm_flush_buffer,
- .ioctl = bcm_ioctl,
- .throttle = bcm_throttle,
- .unthrottle = bcm_unthrottle,
- .send_xchar = bcm_send_xchar,
- .set_termios = bcm_set_termios,
- .stop = bcm_stop,
- .start = bcm_start,
- .hangup = bcm_hangup,
-};
-
-/* --------------------------------------------------------------------------
- Name: bcm63xx_serialinit
- Purpose: Initialize our BCM63xx serial driver
--------------------------------------------------------------------------- */
-static int __init bcm63xx_serialinit(void)
-{
- int i, flags;
- struct bcm_serial *info;
-
- // Print the driver version information
- printk(VER_STR);
- serial_driver = alloc_tty_driver(BCM_NUM_UARTS);
- if (!serial_driver)
- return -ENOMEM;
-
- serial_driver->owner = THIS_MODULE;
- serial_driver->name = "ttyS";
- serial_driver->major = TTY_MAJOR;
- serial_driver->minor_start = 64;
- serial_driver->num = 1;
- serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
- serial_driver->subtype = SERIAL_TYPE_NORMAL;
- serial_driver->init_termios = tty_std_termios;
- serial_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
- serial_driver->flags = TTY_DRIVER_REAL_RAW;
-
- serial_driver->termios = serial_termios;
- serial_driver->termios_locked = serial_termios_locked;
-
- tty_set_operations(serial_driver, &rs_ops);
-
- if (tty_register_driver(serial_driver))
- panic("Couldn't register serial driver\n");
-
- //save_flags(flags); cli();
- spin_lock_irqsave(&bcm963xx_serial_lock, flags);
-
- for (i = 0; i < 1; i++) {
- info = &multi[i];
- lines[i] = info;
- info->magic = SERIAL_MAGIC;
- info->port = (Uart *) ((char *) UART_BASE + (i * 0x20));
- info->tty = 0;
- info->irq = (2 - i) + 8;
- info->line = i;
- info->close_delay = 50;
- info->closing_wait = 3000;
- info->x_char = 0;
- info->event = 0;
- info->count = 0;
- info->blocked_open = 0;
- info->normal_termios = serial_driver->init_termios;
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
-
- /* If we are pointing to address zero then punt - not correctly
- * set up in setup.c to handle this.
- */
- if (!info->port)
- return 0;
- BcmHalMapInterrupt(bcm_interrupt, 0, INTERRUPT_ID_UART);
- }
-
- /* order matters here... the trick is that flags
- * is updated... in request_irq - to immediatedly obliterate
- * it is unwise.
- */
- spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
- return 0;
-}
-
-module_init(bcm63xx_serialinit);
-
-/* --------------------------------------------------------------------------
- Name: bcm_console_print
- Purpose: bcm_console_print is registered for printk.
- The console_lock must be held when we get here.
--------------------------------------------------------------------------- */
-static void bcm_console_print(struct console *cons, const char *str,
- unsigned int count)
-{
- unsigned int i;
- //_puts(str);
- for (i = 0; i < count; i++, str++) {
- _putc(*str);
- if (*str == 10) {
- _putc(13);
- }
- }
-}
-
-static struct tty_driver *bcm_console_device(struct console *c, int *index)
-{
- *index = c->index;
- return serial_driver;
-}
-
-static int __init bcm_console_setup(struct console *co, char *options)
-{
- return 0;
-}
-
-static struct console bcm_sercons = {
- .name = "ttyS",
- .write = bcm_console_print,
- .device = bcm_console_device,
- .setup = bcm_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
-static int __init bcm63xx_console_init(void)
-{
- register_console(&bcm_sercons);
- return 0;
-}
-
-console_initcall(bcm63xx_console_init);
projects / openwrt.git / blobdiff