* ever possible.
*/
-#include <linux/config.h>
#include <linux/delay.h>
#undef SERIAL_PARANOIA_CHECK
/* Sanity checks */
-#define SERIAL_INLINE
-
#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
#define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
tty->name, (info->flags), serial_driver->refcount,info->count,tty->count,s)
#include <asm/amigahw.h>
#include <asm/amigaints.h>
-#ifdef SERIAL_INLINE
-#define _INLINE_ inline
-#endif
-
+#define custom amiga_custom
static char *serial_name = "Amiga-builtin serial driver";
static struct tty_driver *serial_driver;
static unsigned char current_ctl_bits;
-static void change_speed(struct async_struct *info, struct termios *old);
+static void change_speed(struct async_struct *info, struct ktermios *old);
static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
#define NR_PORTS ARRAY_SIZE(rs_table)
-/*
- * tmp_buf is used as a temporary buffer by serial_write. We need to
- * lock it in case the copy_from_user blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-static DECLARE_MUTEX(tmp_buf_sem);
-
#include <asm/uaccess.h>
#define serial_isroot() (capable(CAP_SYS_ADMIN))
* This routine is used by the interrupt handler to schedule
* processing in the software interrupt portion of the driver.
*/
-static _INLINE_ void rs_sched_event(struct async_struct *info,
- int event)
+static void rs_sched_event(struct async_struct *info,
+ int event)
{
info->event |= 1 << event;
tasklet_schedule(&info->tlet);
}
-static _INLINE_ void receive_chars(struct async_struct *info)
+static void receive_chars(struct async_struct *info)
{
int status;
int serdatr;
struct tty_struct *tty = info->tty;
- unsigned char ch;
+ unsigned char ch, flag;
struct async_icount *icount;
+ int oe = 0;
icount = &info->state->icount;
status |= UART_LSR_OE;
ch = serdatr & 0xff;
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- goto ignore_char;
- *tty->flip.char_buf_ptr = ch;
icount->rx++;
#ifdef SERIAL_DEBUG_INTR
printk("DR%02x:%02x...", ch, status);
#endif
- *tty->flip.flag_buf_ptr = 0;
+ flag = TTY_NORMAL;
/*
* We don't handle parity or frame errors - but I have left
* should be ignored.
*/
if (status & info->ignore_status_mask)
- goto ignore_char;
+ goto out;
status &= info->read_status_mask;
#ifdef SERIAL_DEBUG_INTR
printk("handling break....");
#endif
- *tty->flip.flag_buf_ptr = TTY_BREAK;
+ flag = TTY_BREAK;
if (info->flags & ASYNC_SAK)
do_SAK(tty);
} else if (status & UART_LSR_PE)
- *tty->flip.flag_buf_ptr = TTY_PARITY;
+ flag = TTY_PARITY;
else if (status & UART_LSR_FE)
- *tty->flip.flag_buf_ptr = TTY_FRAME;
+ flag = TTY_FRAME;
if (status & UART_LSR_OE) {
/*
* Overrun is special, since it's
* reported immediately, and doesn't
* affect the current character
*/
- if (tty->flip.count < TTY_FLIPBUF_SIZE) {
- tty->flip.count++;
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- *tty->flip.flag_buf_ptr = TTY_OVERRUN;
- }
+ oe = 1;
}
}
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
- ignore_char:
-
+ tty_insert_flip_char(tty, ch, flag);
+ if (oe == 1)
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
tty_flip_buffer_push(tty);
+out:
+ return;
}
-static _INLINE_ void transmit_chars(struct async_struct *info)
+static void transmit_chars(struct async_struct *info)
{
custom.intreq = IF_TBE;
mb();
}
}
-static _INLINE_ void check_modem_status(struct async_struct *info)
+static void check_modem_status(struct async_struct *info)
{
unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
unsigned char dstatus;
}
}
-static irqreturn_t ser_vbl_int( int irq, void *data, struct pt_regs *regs)
+static irqreturn_t ser_vbl_int( int irq, void *data)
{
/* vbl is just a periodic interrupt we tie into to update modem status */
struct async_struct * info = IRQ_ports;
return IRQ_HANDLED;
}
-static irqreturn_t ser_rx_int(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t ser_rx_int(int irq, void *dev_id)
{
struct async_struct * info;
return IRQ_HANDLED;
}
-static irqreturn_t ser_tx_int(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t ser_tx_int(int irq, void *dev_id)
{
struct async_struct * info;
if (!tty)
return;
- if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
+ if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
tty_wakeup(tty);
- wake_up_interruptible(&tty->write_wait);
- }
}
/*
* the specified baud rate for a serial port.
*/
static void change_speed(struct async_struct *info,
- struct termios *old_termios)
+ struct ktermios *old_termios)
{
int quot = 0, baud_base, baud;
unsigned cflag, cval = 0;
}
/* If the quotient is zero refuse the change */
if (!quot && old_termios) {
+ /* FIXME: Will need updating for new tty in the end */
info->tty->termios->c_cflag &= ~CBAUD;
info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
baud = tty_get_baud_rate(info->tty);
/*
* Set up parity check flag
*/
-#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
info->read_status_mask = UART_LSR_OE | UART_LSR_DR;
if (I_INPCK(info->tty))
local_irq_restore(flags);
}
-static void rs_put_char(struct tty_struct *tty, unsigned char ch)
+static int rs_put_char(struct tty_struct *tty, unsigned char ch)
{
struct async_struct *info;
unsigned long flags;
if (!tty)
- return;
+ return 0;
info = tty->driver_data;
if (serial_paranoia_check(info, tty->name, "rs_put_char"))
- return;
+ return 0;
if (!info->xmit.buf)
- return;
+ return 0;
local_irq_save(flags);
if (CIRC_SPACE(info->xmit.head,
info->xmit.tail,
SERIAL_XMIT_SIZE) == 0) {
local_irq_restore(flags);
- return;
+ return 0;
}
info->xmit.buf[info->xmit.head++] = ch;
info->xmit.head &= SERIAL_XMIT_SIZE-1;
local_irq_restore(flags);
+ return 1;
}
static void rs_flush_chars(struct tty_struct *tty)
if (serial_paranoia_check(info, tty->name, "rs_write"))
return 0;
- if (!info->xmit.buf || !tmp_buf)
+ if (!info->xmit.buf)
return 0;
- local_save_flags(flags);
- local_irq_disable();
+ local_irq_save(flags);
while (1) {
c = CIRC_SPACE_TO_END(info->xmit.head,
info->xmit.tail,
local_irq_save(flags);
info->xmit.head = info->xmit.tail = 0;
local_irq_restore(flags);
- wake_up_interruptible(&tty->write_wait);
tty_wakeup(tty);
}
*/
static int get_serial_info(struct async_struct * info,
- struct serial_struct * retinfo)
+ struct serial_struct __user * retinfo)
{
struct serial_struct tmp;
struct serial_state *state = info->state;
if (!retinfo)
return -EFAULT;
memset(&tmp, 0, sizeof(tmp));
+ lock_kernel();
tmp.type = state->type;
tmp.line = state->line;
tmp.port = state->port;
tmp.close_delay = state->close_delay;
tmp.closing_wait = state->closing_wait;
tmp.custom_divisor = state->custom_divisor;
+ unlock_kernel();
if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
return -EFAULT;
return 0;
}
static int set_serial_info(struct async_struct * info,
- struct serial_struct * new_info)
+ struct serial_struct __user * new_info)
{
struct serial_struct new_serial;
struct serial_state old_state, *state;
if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
return -EFAULT;
+
+ lock_kernel();
state = info->state;
old_state = *state;
change_irq = new_serial.irq != state->irq;
change_port = (new_serial.port != state->port);
- if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size))
+ if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) {
+ unlock_kernel();
return -EINVAL;
+ }
if (!serial_isroot()) {
if ((new_serial.baud_base != state->baud_base) ||
goto check_and_exit;
}
- if (new_serial.baud_base < 9600)
+ if (new_serial.baud_base < 9600) {
+ unlock_kernel();
return -EINVAL;
+ }
/*
* OK, past this point, all the error checking has been done.
}
} else
retval = startup(info);
+ unlock_kernel();
return retval;
}
* transmit holding register is empty. This functionality
* allows an RS485 driver to be written in user space.
*/
-static int get_lsr_info(struct async_struct * info, unsigned int *value)
+static int get_lsr_info(struct async_struct * info, unsigned int __user *value)
{
unsigned char status;
unsigned int result;
struct async_struct * info = (struct async_struct *)tty->driver_data;
struct async_icount cprev, cnow; /* kernel counter temps */
struct serial_icounter_struct icount;
+ void __user *argp = (void __user *)arg;
unsigned long flags;
if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
switch (cmd) {
case TIOCGSERIAL:
- return get_serial_info(info,
- (struct serial_struct *) arg);
+ return get_serial_info(info, argp);
case TIOCSSERIAL:
- return set_serial_info(info,
- (struct serial_struct *) arg);
+ return set_serial_info(info, argp);
case TIOCSERCONFIG:
return 0;
case TIOCSERGETLSR: /* Get line status register */
- return get_lsr_info(info, (unsigned int *) arg);
+ return get_lsr_info(info, argp);
case TIOCSERGSTRUCT:
- if (copy_to_user((struct async_struct *) arg,
+ if (copy_to_user(argp,
info, sizeof(struct async_struct)))
return -EFAULT;
return 0;
icount.brk = cnow.brk;
icount.buf_overrun = cnow.buf_overrun;
- if (copy_to_user((void *)arg, &icount, sizeof(icount)))
+ if (copy_to_user(argp, &icount, sizeof(icount)))
return -EFAULT;
return 0;
case TIOCSERGWILD:
return 0;
}
-static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
+static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
{
struct async_struct *info = (struct async_struct *)tty->driver_data;
unsigned long flags;
unsigned int cflag = tty->termios->c_cflag;
- if ( (cflag == old_termios->c_cflag)
- && ( RELEVANT_IFLAG(tty->termios->c_iflag)
- == RELEVANT_IFLAG(old_termios->c_iflag)))
- return;
-
change_speed(info, old_termios);
/* Handle transition to B0 status */
rs_wait_until_sent(tty, info->timeout);
}
shutdown(info);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ rs_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
return; /* Just in case.... */
orig_jiffies = jiffies;
+
+ lock_kernel();
/*
* Set the check interval to be 1/5 of the estimated time to
* send a single character, and make it at least 1. The check
if (timeout && time_after(jiffies, orig_jiffies + timeout))
break;
}
- current->state = TASK_RUNNING;
+ __set_current_state(TASK_RUNNING);
+ unlock_kernel();
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
#endif
#endif
schedule();
}
- current->state = TASK_RUNNING;
+ __set_current_state(TASK_RUNNING);
remove_wait_queue(&info->open_wait, &wait);
if (extra_count)
state->count++;
*ret_info = sstate->info;
return 0;
}
- info = kmalloc(sizeof(struct async_struct), GFP_KERNEL);
+ info = kzalloc(sizeof(struct async_struct), GFP_KERNEL);
if (!info) {
sstate->count--;
return -ENOMEM;
}
- memset(info, 0, sizeof(struct async_struct));
#ifdef DECLARE_WAITQUEUE
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
{
struct async_struct *info;
int retval, line;
- unsigned long page;
line = tty->index;
if ((line < 0) || (line >= NR_PORTS)) {
#endif
info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
- if (!tmp_buf) {
- page = get_zeroed_page(GFP_KERNEL);
- if (!page) {
- return -ENOMEM;
- }
- if (tmp_buf)
- free_page(page);
- else
- tmp_buf = (unsigned char *) page;
- }
-
/*
* If the port is the middle of closing, bail out now
*/
* number, and identifies which options were configured into this
* driver.
*/
-static _INLINE_ void show_serial_version(void)
+static void show_serial_version(void)
{
printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
}
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
.open = rs_open,
.close = rs_close,
.write = rs_write,
/* set ISRs, and then disable the rx interrupts */
request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state);
- request_irq(IRQ_AMIGA_RBF, ser_rx_int, SA_INTERRUPT, "serial RX", state);
+ request_irq(IRQ_AMIGA_RBF, ser_rx_int, IRQF_DISABLED, "serial RX", state);
/* turn off Rx and Tx interrupts */
custom.intena = IF_RBF | IF_TBE;
kfree(info);
}
- if (tmp_buf) {
- free_page((unsigned long) tmp_buf);
- tmp_buf = NULL;
- }
-
release_mem_region(CUSTOM_PHYSADDR+0x30, 4);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff