We want the fixes here.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
RTAS and should not be registered.
- no-loopback-test: set to indicate that the port does not implements loopback
test mode
+- fifo-size: the fifo size of the UART.
+- auto-flow-control: one way to enable automatic flow control support. The
+ driver is allowed to detect support for the capability even without this
+ property.
Example:
.ctrlbit = S3C2440_CLKCON_AC97,
};
+#define S3C24XX_VA_UART0 (S3C_VA_UART)
+#define S3C24XX_VA_UART1 (S3C_VA_UART + 0x4000 )
+#define S3C24XX_VA_UART2 (S3C_VA_UART + 0x8000 )
+#define S3C24XX_VA_UART3 (S3C_VA_UART + 0xC000 )
+
static unsigned long s3c2440_fclk_n_getrate(struct clk *clk)
{
unsigned long ucon0, ucon1, ucon2, divisor;
/* Serial port registrations */
+#define S3C2410_PA_UART0 (S3C24XX_PA_UART)
+#define S3C2410_PA_UART1 (S3C24XX_PA_UART + 0x4000 )
+#define S3C2410_PA_UART2 (S3C24XX_PA_UART + 0x8000 )
+#define S3C2443_PA_UART3 (S3C24XX_PA_UART + 0xC000 )
+
static struct resource s3c2410_uart0_resource[] = {
[0] = DEFINE_RES_MEM(S3C2410_PA_UART0, SZ_16K),
[1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX0, \
-/* arch/arm/plat-samsung/include/plat/regs-serial.h
- *
- * From linux/include/asm-arm/hardware/serial_s3c2410.h
- *
- * Internal header file for Samsung S3C2410 serial ports (UART0-2)
- *
- * Copyright (C) 2002 Shane Nay (shane@minirl.com)
- *
- * Additional defines, Copyright 2003 Simtec Electronics (linux@simtec.co.uk)
- *
- * Adapted from:
- *
- * Internal header file for MX1ADS serial ports (UART1 & 2)
- *
- * Copyright (C) 2002 Shane Nay (shane@minirl.com)
- *
- * 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
-*/
-
-#ifndef __ASM_ARM_REGS_SERIAL_H
-#define __ASM_ARM_REGS_SERIAL_H
-
-#define S3C24XX_VA_UART0 (S3C_VA_UART)
-#define S3C24XX_VA_UART1 (S3C_VA_UART + 0x4000 )
-#define S3C24XX_VA_UART2 (S3C_VA_UART + 0x8000 )
-#define S3C24XX_VA_UART3 (S3C_VA_UART + 0xC000 )
-
-#define S3C2410_PA_UART0 (S3C24XX_PA_UART)
-#define S3C2410_PA_UART1 (S3C24XX_PA_UART + 0x4000 )
-#define S3C2410_PA_UART2 (S3C24XX_PA_UART + 0x8000 )
-#define S3C2443_PA_UART3 (S3C24XX_PA_UART + 0xC000 )
-
-#define S3C2410_URXH (0x24)
-#define S3C2410_UTXH (0x20)
-#define S3C2410_ULCON (0x00)
-#define S3C2410_UCON (0x04)
-#define S3C2410_UFCON (0x08)
-#define S3C2410_UMCON (0x0C)
-#define S3C2410_UBRDIV (0x28)
-#define S3C2410_UTRSTAT (0x10)
-#define S3C2410_UERSTAT (0x14)
-#define S3C2410_UFSTAT (0x18)
-#define S3C2410_UMSTAT (0x1C)
-
-#define S3C2410_LCON_CFGMASK ((0xF<<3)|(0x3))
-
-#define S3C2410_LCON_CS5 (0x0)
-#define S3C2410_LCON_CS6 (0x1)
-#define S3C2410_LCON_CS7 (0x2)
-#define S3C2410_LCON_CS8 (0x3)
-#define S3C2410_LCON_CSMASK (0x3)
-
-#define S3C2410_LCON_PNONE (0x0)
-#define S3C2410_LCON_PEVEN (0x5 << 3)
-#define S3C2410_LCON_PODD (0x4 << 3)
-#define S3C2410_LCON_PMASK (0x7 << 3)
-
-#define S3C2410_LCON_STOPB (1<<2)
-#define S3C2410_LCON_IRM (1<<6)
-
-#define S3C2440_UCON_CLKMASK (3<<10)
-#define S3C2440_UCON_CLKSHIFT (10)
-#define S3C2440_UCON_PCLK (0<<10)
-#define S3C2440_UCON_UCLK (1<<10)
-#define S3C2440_UCON_PCLK2 (2<<10)
-#define S3C2440_UCON_FCLK (3<<10)
-#define S3C2443_UCON_EPLL (3<<10)
-
-#define S3C6400_UCON_CLKMASK (3<<10)
-#define S3C6400_UCON_CLKSHIFT (10)
-#define S3C6400_UCON_PCLK (0<<10)
-#define S3C6400_UCON_PCLK2 (2<<10)
-#define S3C6400_UCON_UCLK0 (1<<10)
-#define S3C6400_UCON_UCLK1 (3<<10)
-
-#define S3C2440_UCON2_FCLK_EN (1<<15)
-#define S3C2440_UCON0_DIVMASK (15 << 12)
-#define S3C2440_UCON1_DIVMASK (15 << 12)
-#define S3C2440_UCON2_DIVMASK (7 << 12)
-#define S3C2440_UCON_DIVSHIFT (12)
-
-#define S3C2412_UCON_CLKMASK (3<<10)
-#define S3C2412_UCON_CLKSHIFT (10)
-#define S3C2412_UCON_UCLK (1<<10)
-#define S3C2412_UCON_USYSCLK (3<<10)
-#define S3C2412_UCON_PCLK (0<<10)
-#define S3C2412_UCON_PCLK2 (2<<10)
-
-#define S3C2410_UCON_CLKMASK (1 << 10)
-#define S3C2410_UCON_CLKSHIFT (10)
-#define S3C2410_UCON_UCLK (1<<10)
-#define S3C2410_UCON_SBREAK (1<<4)
-
-#define S3C2410_UCON_TXILEVEL (1<<9)
-#define S3C2410_UCON_RXILEVEL (1<<8)
-#define S3C2410_UCON_TXIRQMODE (1<<2)
-#define S3C2410_UCON_RXIRQMODE (1<<0)
-#define S3C2410_UCON_RXFIFO_TOI (1<<7)
-#define S3C2443_UCON_RXERR_IRQEN (1<<6)
-#define S3C2443_UCON_LOOPBACK (1<<5)
-
-#define S3C2410_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
- S3C2410_UCON_RXILEVEL | \
- S3C2410_UCON_TXIRQMODE | \
- S3C2410_UCON_RXIRQMODE | \
- S3C2410_UCON_RXFIFO_TOI)
-
-#define S3C2410_UFCON_FIFOMODE (1<<0)
-#define S3C2410_UFCON_TXTRIG0 (0<<6)
-#define S3C2410_UFCON_RXTRIG8 (1<<4)
-#define S3C2410_UFCON_RXTRIG12 (2<<4)
-
-/* S3C2440 FIFO trigger levels */
-#define S3C2440_UFCON_RXTRIG1 (0<<4)
-#define S3C2440_UFCON_RXTRIG8 (1<<4)
-#define S3C2440_UFCON_RXTRIG16 (2<<4)
-#define S3C2440_UFCON_RXTRIG32 (3<<4)
-
-#define S3C2440_UFCON_TXTRIG0 (0<<6)
-#define S3C2440_UFCON_TXTRIG16 (1<<6)
-#define S3C2440_UFCON_TXTRIG32 (2<<6)
-#define S3C2440_UFCON_TXTRIG48 (3<<6)
-
-#define S3C2410_UFCON_RESETBOTH (3<<1)
-#define S3C2410_UFCON_RESETTX (1<<2)
-#define S3C2410_UFCON_RESETRX (1<<1)
-
-#define S3C2410_UFCON_DEFAULT (S3C2410_UFCON_FIFOMODE | \
- S3C2410_UFCON_TXTRIG0 | \
- S3C2410_UFCON_RXTRIG8 )
-
-#define S3C2410_UMCOM_AFC (1<<4)
-#define S3C2410_UMCOM_RTS_LOW (1<<0)
-
-#define S3C2412_UMCON_AFC_63 (0<<5) /* same as s3c2443 */
-#define S3C2412_UMCON_AFC_56 (1<<5)
-#define S3C2412_UMCON_AFC_48 (2<<5)
-#define S3C2412_UMCON_AFC_40 (3<<5)
-#define S3C2412_UMCON_AFC_32 (4<<5)
-#define S3C2412_UMCON_AFC_24 (5<<5)
-#define S3C2412_UMCON_AFC_16 (6<<5)
-#define S3C2412_UMCON_AFC_8 (7<<5)
-
-#define S3C2410_UFSTAT_TXFULL (1<<9)
-#define S3C2410_UFSTAT_RXFULL (1<<8)
-#define S3C2410_UFSTAT_TXMASK (15<<4)
-#define S3C2410_UFSTAT_TXSHIFT (4)
-#define S3C2410_UFSTAT_RXMASK (15<<0)
-#define S3C2410_UFSTAT_RXSHIFT (0)
-
-/* UFSTAT S3C2443 same as S3C2440 */
-#define S3C2440_UFSTAT_TXFULL (1<<14)
-#define S3C2440_UFSTAT_RXFULL (1<<6)
-#define S3C2440_UFSTAT_TXSHIFT (8)
-#define S3C2440_UFSTAT_RXSHIFT (0)
-#define S3C2440_UFSTAT_TXMASK (63<<8)
-#define S3C2440_UFSTAT_RXMASK (63)
-
-#define S3C2410_UTRSTAT_TXE (1<<2)
-#define S3C2410_UTRSTAT_TXFE (1<<1)
-#define S3C2410_UTRSTAT_RXDR (1<<0)
-
-#define S3C2410_UERSTAT_OVERRUN (1<<0)
-#define S3C2410_UERSTAT_FRAME (1<<2)
-#define S3C2410_UERSTAT_BREAK (1<<3)
-#define S3C2443_UERSTAT_PARITY (1<<1)
-
-#define S3C2410_UERSTAT_ANY (S3C2410_UERSTAT_OVERRUN | \
- S3C2410_UERSTAT_FRAME | \
- S3C2410_UERSTAT_BREAK)
-
-#define S3C2410_UMSTAT_CTS (1<<0)
-#define S3C2410_UMSTAT_DeltaCTS (1<<2)
-
-#define S3C2443_DIVSLOT (0x2C)
-
-/* S3C64XX interrupt registers. */
-#define S3C64XX_UINTP 0x30
-#define S3C64XX_UINTSP 0x34
-#define S3C64XX_UINTM 0x38
-
-#define S3C64XX_UINTM_RXD (0)
-#define S3C64XX_UINTM_TXD (2)
-#define S3C64XX_UINTM_RXD_MSK (1 << S3C64XX_UINTM_RXD)
-#define S3C64XX_UINTM_TXD_MSK (1 << S3C64XX_UINTM_TXD)
-
-/* Following are specific to S5PV210 */
-#define S5PV210_UCON_CLKMASK (1<<10)
-#define S5PV210_UCON_CLKSHIFT (10)
-#define S5PV210_UCON_PCLK (0<<10)
-#define S5PV210_UCON_UCLK (1<<10)
-
-#define S5PV210_UFCON_TXTRIG0 (0<<8)
-#define S5PV210_UFCON_TXTRIG4 (1<<8)
-#define S5PV210_UFCON_TXTRIG8 (2<<8)
-#define S5PV210_UFCON_TXTRIG16 (3<<8)
-#define S5PV210_UFCON_TXTRIG32 (4<<8)
-#define S5PV210_UFCON_TXTRIG64 (5<<8)
-#define S5PV210_UFCON_TXTRIG128 (6<<8)
-#define S5PV210_UFCON_TXTRIG256 (7<<8)
-
-#define S5PV210_UFCON_RXTRIG1 (0<<4)
-#define S5PV210_UFCON_RXTRIG4 (1<<4)
-#define S5PV210_UFCON_RXTRIG8 (2<<4)
-#define S5PV210_UFCON_RXTRIG16 (3<<4)
-#define S5PV210_UFCON_RXTRIG32 (4<<4)
-#define S5PV210_UFCON_RXTRIG64 (5<<4)
-#define S5PV210_UFCON_RXTRIG128 (6<<4)
-#define S5PV210_UFCON_RXTRIG256 (7<<4)
-
-#define S5PV210_UFSTAT_TXFULL (1<<24)
-#define S5PV210_UFSTAT_RXFULL (1<<8)
-#define S5PV210_UFSTAT_TXMASK (255<<16)
-#define S5PV210_UFSTAT_TXSHIFT (16)
-#define S5PV210_UFSTAT_RXMASK (255<<0)
-#define S5PV210_UFSTAT_RXSHIFT (0)
-
-#define S3C2410_UCON_CLKSEL0 (1 << 0)
-#define S3C2410_UCON_CLKSEL1 (1 << 1)
-#define S3C2410_UCON_CLKSEL2 (1 << 2)
-#define S3C2410_UCON_CLKSEL3 (1 << 3)
-
-/* Default values for s5pv210 UCON and UFCON uart registers */
-#define S5PV210_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
- S3C2410_UCON_RXILEVEL | \
- S3C2410_UCON_TXIRQMODE | \
- S3C2410_UCON_RXIRQMODE | \
- S3C2410_UCON_RXFIFO_TOI | \
- S3C2443_UCON_RXERR_IRQEN)
-
-#define S5PV210_UFCON_DEFAULT (S3C2410_UFCON_FIFOMODE | \
- S5PV210_UFCON_TXTRIG4 | \
- S5PV210_UFCON_RXTRIG4)
-
-#ifndef __ASSEMBLY__
-
-/* configuration structure for per-machine configurations for the
- * serial port
- *
- * the pointer is setup by the machine specific initialisation from the
- * arch/arm/mach-s3c2410/ directory.
-*/
-
-struct s3c2410_uartcfg {
- unsigned char hwport; /* hardware port number */
- unsigned char unused;
- unsigned short flags;
- upf_t uart_flags; /* default uart flags */
- unsigned int clk_sel;
-
- unsigned int has_fracval;
-
- unsigned long ucon; /* value of ucon for port */
- unsigned long ulcon; /* value of ulcon for port */
- unsigned long ufcon; /* value of ufcon for port */
-};
-
-/* s3c24xx_uart_devs
- *
- * this is exported from the core as we cannot use driver_register(),
- * or platform_add_device() before the console_initcall()
-*/
-
-extern struct platform_device *s3c24xx_uart_devs[4];
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* __ASM_ARM_REGS_SERIAL_H */
-
+#include <linux/serial_s3c.h>
goto out;
}
- if (info->xmit.head == info->xmit.tail || tty->stopped ||
- tty->hw_stopped) {
+ if (info->xmit.head == info->xmit.tail || tty->stopped) {
#ifdef SIMSERIAL_DEBUG
printk("transmit_chars: head=%d, tail=%d, stopped=%d\n",
info->xmit.head, info->xmit.tail, tty->stopped);
struct serial_state *info = tty->driver_data;
if (info->xmit.head == info->xmit.tail || tty->stopped ||
- tty->hw_stopped || !info->xmit.buf)
+ !info->xmit.buf)
return;
transmit_chars(tty, info, NULL);
* Hey, we transmit directly from here in our case
*/
if (CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE) &&
- !tty->stopped && !tty->hw_stopped)
+ !tty->stopped)
transmit_chars(tty, info, NULL);
return ret;
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- /* Handle turning off CRTSCTS */
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios.c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- }
-}
/*
* This routine will shutdown a serial port; interrupts are disabled, and
* DTR is dropped if the hangup on close termio flag is on.
.throttle = rs_throttle,
.unthrottle = rs_unthrottle,
.send_xchar = rs_send_xchar,
- .set_termios = rs_set_termios,
.hangup = rs_hangup,
.proc_fops = &rs_proc_fops,
};
reactivate_fd(chan->fd, irq);
if (err == -EIO) {
if (chan->primary) {
- struct tty_struct *tty = tty_port_tty_get(&line->port);
- if (tty != NULL) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&line->port, false);
if (line->chan_out != chan)
close_one_chan(line->chan_out, 1);
}
{
struct chan *chan = data;
struct line *line = chan->line;
- struct tty_struct *tty;
int err;
/*
}
spin_unlock(&line->lock);
- tty = tty_port_tty_get(&line->port);
- if (tty == NULL)
- return IRQ_NONE;
-
- tty_wakeup(tty);
- tty_kref_put(tty);
+ tty_port_tty_wakeup(&line->port);
return IRQ_HANDLED;
}
{
struct capidev *cdev = ap->private;
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- struct tty_struct *tty;
struct capiminor *mp;
u16 datahandle;
struct capincci *np;
CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2));
kfree_skb(skb);
capiminor_del_ack(mp, datahandle);
- tty = tty_port_tty_get(&mp->port);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_wakeup(&mp->port);
handle_minor_send(mp);
} else {
static void if_wake(unsigned long data)
{
struct cardstate *cs = (struct cardstate *)data;
- struct tty_struct *tty = tty_port_tty_get(&cs->port);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_wakeup(&cs->port);
}
/*** interface to common ***/
tty->termios.c_ospeed == old_termios->c_ospeed)
return;
isdn_tty_change_speed(info);
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios.c_cflag & CRTSCTS))
- tty->hw_stopped = 0;
}
}
static void sdio_uart_port_remove(struct sdio_uart_port *port)
{
struct sdio_func *func;
- struct tty_struct *tty;
BUG_ON(sdio_uart_table[port->index] != port);
sdio_claim_host(func);
port->func = NULL;
mutex_unlock(&port->func_lock);
- tty = tty_port_tty_get(&port->port);
/* tty_hangup is async so is this safe as is ?? */
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&port->port, false);
mutex_unlock(&port->port.mutex);
sdio_release_irq(func);
sdio_disable_func(func);
wake_up_interruptible(&port->port.open_wait);
else {
/* DCD drop - hang up if tty attached */
- tty = tty_port_tty_get(&port->port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&port->port, false);
}
}
if (status & UART_MSR_DCTS) {
{
ser->tty_status =
ser->tty->stopped << 5 |
- ser->tty->hw_stopped << 4 |
ser->tty->flow_stopped << 3 |
ser->tty->packet << 2 |
- ser->tty->port->low_latency << 1 |
- ser->tty->warned;
+ ser->tty->port->low_latency << 1;
}
static inline void debugfs_init(struct ser_device *ser, struct tty_struct *tty)
{
/* flush our buffers and the serial port's buffer */
if (arg == TCIOFLUSH || arg == TCOFLUSH)
ppp_async_flush_output(ap);
- err = tty_perform_flush(tty, arg);
+ err = n_tty_ioctl_helper(tty, file, cmd, arg);
break;
case FIONREAD:
/* flush our buffers and the serial port's buffer */
if (arg == TCIOFLUSH || arg == TCOFLUSH)
ppp_sync_flush_output(ap);
- err = tty_perform_flush(tty, arg);
+ err = n_tty_ioctl_helper(tty, file, cmd, arg);
break;
case FIONREAD:
{
struct hso_serial *serial = urb->context;
int status = urb->status;
- struct tty_struct *tty;
/* sanity check */
if (!serial) {
return;
}
hso_put_activity(serial->parent);
- tty = tty_port_tty_get(&serial->port);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_wakeup(&serial->port);
hso_kick_transmit(serial);
D1(" ");
put_rxbuf_data_and_resubmit_ctrl_urb(serial);
spin_unlock(&serial->serial_lock);
} else {
- struct tty_struct *tty = tty_port_tty_get(&serial->port);
hso_put_activity(serial->parent);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_wakeup(&serial->port);
/* response to a write command */
hso_kick_transmit(serial);
}
static void hso_free_interface(struct usb_interface *interface)
{
struct hso_serial *hso_dev;
- struct tty_struct *tty;
int i;
for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
if (serial_table[i] &&
(serial_table[i]->interface == interface)) {
hso_dev = dev2ser(serial_table[i]);
- tty = tty_port_tty_get(&hso_dev->port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&hso_dev->port, false);
mutex_lock(&hso_dev->parent->mutex);
hso_dev->parent->usb_gone = 1;
mutex_unlock(&hso_dev->parent->mutex);
static void
sclp_ttybuf_callback(struct sclp_buffer *buffer, int rc)
{
- struct tty_struct *tty;
unsigned long flags;
void *page;
struct sclp_buffer, list);
spin_unlock_irqrestore(&sclp_tty_lock, flags);
} while (buffer && sclp_emit_buffer(buffer, sclp_ttybuf_callback));
- /* check if the tty needs a wake up call */
- tty = tty_port_tty_get(&sclp_port);
- if (tty != NULL) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
+
+ tty_port_tty_wakeup(&sclp_port);
}
static inline void
static void
sclp_vt220_process_queue(struct sclp_vt220_request *request)
{
- struct tty_struct *tty;
unsigned long flags;
void *page;
} while (__sclp_vt220_emit(request));
if (request == NULL && sclp_vt220_flush_later)
sclp_vt220_emit_current();
- /* Check if the tty needs a wake up call */
- tty = tty_port_tty_get(&sclp_vt220_port);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_wakeup(&sclp_vt220_port);
}
#define SCLP_BUFFER_MAX_RETRY 1
struct fwtty_transaction *txn)
{
struct fwtty_port *port = txn->port;
- struct tty_struct *tty;
int len;
fwtty_dbg(port, "rcode: %d", rcode);
port->stats.dropped += txn->dma_pended.len;
}
- if (len < WAKEUP_CHARS) {
- tty = tty_port_tty_get(&port->port);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
- }
+ if (len < WAKEUP_CHARS)
+ tty_port_tty_wakeup(&port->port);
}
static int fwtty_tx(struct fwtty_port *port, bool drain)
static void qt_write_bulk_callback(struct urb *urb)
{
- struct tty_struct *tty;
int status;
struct quatech_port *quatech_port;
quatech_port = urb->context;
- tty = tty_port_tty_get(&quatech_port->port->port);
-
- if (tty)
- tty_wakeup(tty);
- tty_kref_put(tty);
+ tty_port_tty_wakeup(&quatech_port->port->port);
}
static void qt_interrupt_callback(struct urb *urb)
},
};
-static int __init amiga_serial_init(void)
-{
- return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe);
-}
-
-module_init(amiga_serial_init);
-
-static void __exit amiga_serial_exit(void)
-{
- platform_driver_unregister(&amiga_serial_driver);
-}
-
-module_exit(amiga_serial_exit);
+module_platform_driver_probe(amiga_serial_driver, amiga_serial_probe);
#if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE)
readl(&info->u.cyz.ch_ctrl->rs_status);
if (dcd & C_RS_DCD)
wake_up_interruptible(&info->port.open_wait);
- else {
- struct tty_struct *tty;
- tty = tty_port_tty_get(&info->port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
- }
+ else
+ tty_port_tty_hangup(&info->port, false);
}
break;
case C_CM_MCTS:
static irqreturn_t ehv_bc_tty_tx_isr(int irq, void *data)
{
struct ehv_bc_data *bc = data;
- struct tty_struct *ttys = tty_port_tty_get(&bc->port);
ehv_bc_tx_dequeue(bc);
- if (ttys) {
- tty_wakeup(ttys);
- tty_kref_put(ttys);
- }
+ tty_port_tty_wakeup(&bc->port);
return IRQ_HANDLED;
}
{
struct hvsi_struct *hp =
container_of(work, struct hvsi_struct, writer.work);
- struct tty_struct *tty;
unsigned long flags;
#ifdef DEBUG
static long start_j = 0;
start_j = 0;
#endif /* DEBUG */
wake_up_all(&hp->emptyq);
- tty = tty_port_tty_get(&hp->port);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_wakeup(&hp->port);
}
out:
flush_work(&hw->work_rx);
for (i = 0; i < NL_NUM_OF_ADDRESSES; i++)
- if (hw->packet_assembler[i] != NULL)
- kfree(hw->packet_assembler[i]);
+ kfree(hw->packet_assembler[i]);
for (i = 0; i < NL_NUM_OF_PRIORITIES; i++)
list_for_each_entry_safe(tp, tq, &hw->tx_queue[i], queue) {
/* pci hot-un-plug support */
for (a = 0; a < brd->numPorts; a++)
- if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
- struct tty_struct *tty = tty_port_tty_get(
- &brd->ports[a].port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
- }
+ if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
+ tty_port_tty_hangup(&brd->ports[a].port, false);
+
for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
tty_port_destroy(&brd->ports[a].port);
+
while (1) {
opened = 0;
for (a = 0; a < brd->numPorts; a++)
static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
{
- struct tty_struct *tty;
unsigned long flags;
dcd = !!dcd;
if (dcd != p->DCDState) {
p->DCDState = dcd;
spin_unlock_irqrestore(&p->port.lock, flags);
- tty = tty_port_tty_get(&p->port);
- if (tty && !C_CLOCAL(tty) && !dcd)
- tty_hangup(tty);
- tty_kref_put(tty);
+ if (!dcd)
+ tty_port_tty_hangup(&p->port, true);
}
else
spin_unlock_irqrestore(&p->port.lock, flags);
mutex_lock(&port->mutex);
mxser_close_port(port);
mxser_flush_buffer(tty);
+ if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
+ if (C_HUPCL(tty))
+ tty_port_lower_dtr_rts(port);
+ }
mxser_shutdown_port(port);
clear_bit(ASYNCB_INITIALIZED, &port->flags);
mutex_unlock(&port->mutex);
pr_debug("DLCI %d goes closed.\n", dlci->addr);
dlci->state = DLCI_CLOSED;
if (dlci->addr != 0) {
- struct tty_struct *tty = tty_port_tty_get(&dlci->port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&dlci->port, false);
kfifo_reset(dlci->fifo);
} else
dlci->gsm->dead = 1;
if (tty_port_close_start(&dlci->port, tty, filp) == 0)
goto out;
gsm_dlci_begin_close(dlci);
+ if (test_bit(ASYNCB_INITIALIZED, &dlci->port.flags)) {
+ if (C_HUPCL(tty))
+ tty_port_lower_dtr_rts(&dlci->port);
+ }
tty_port_close_end(&dlci->port, tty);
tty_port_tty_set(&dlci->port, NULL);
out:
if (left && !old_left) {
WARN_RATELIMIT(tty->port->itty == NULL,
"scheduling with invalid itty\n");
+ /* see if ldisc has been killed - if so, this means that
+ * even though the ldisc has been halted and ->buf.work
+ * cancelled, ->buf.work is about to be rescheduled
+ */
+ WARN_RATELIMIT(test_bit(TTY_LDISC_HALTED, &tty->flags),
+ "scheduling buffer work for halted ldisc\n");
schedule_work(&tty->port->buf.work);
}
}
raw_spin_unlock_irqrestore(&ldata->read_lock, flags);
}
-/**
- * check_unthrottle - allow new receive data
- * @tty; tty device
- *
- * Check whether to call the driver unthrottle functions
- *
- * Can sleep, may be called under the atomic_read_lock mutex but
- * this is not guaranteed.
- */
-static void check_unthrottle(struct tty_struct *tty)
-{
- if (tty->count)
- tty_unthrottle(tty);
-}
-
/**
* reset_buffer_flags - reset buffer state
* @tty: terminal to reset
*
- * Reset the read buffer counters, clear the flags,
- * and make sure the driver is unthrottled. Called
- * from n_tty_open() and n_tty_flush_buffer().
+ * Reset the read buffer counters and clear the flags.
+ * Called from n_tty_open() and n_tty_flush_buffer().
*
* Locking: tty_read_lock for read fields.
*/
-static void reset_buffer_flags(struct tty_struct *tty)
+static void reset_buffer_flags(struct n_tty_data *ldata)
{
- struct n_tty_data *ldata = tty->disc_data;
unsigned long flags;
raw_spin_lock_irqsave(&ldata->read_lock, flags);
ldata->canon_head = ldata->canon_data = ldata->erasing = 0;
bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
- n_tty_set_room(tty);
+}
+
+static void n_tty_packet_mode_flush(struct tty_struct *tty)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&tty->ctrl_lock, flags);
+ if (tty->link->packet) {
+ tty->ctrl_status |= TIOCPKT_FLUSHREAD;
+ wake_up_interruptible(&tty->link->read_wait);
+ }
+ spin_unlock_irqrestore(&tty->ctrl_lock, flags);
}
/**
* n_tty_flush_buffer - clean input queue
* @tty: terminal device
*
- * Flush the input buffer. Called when the line discipline is
- * being closed, when the tty layer wants the buffer flushed (eg
- * at hangup) or when the N_TTY line discipline internally has to
- * clean the pending queue (for example some signals).
+ * Flush the input buffer. Called when the tty layer wants the
+ * buffer flushed (eg at hangup) or when the N_TTY line discipline
+ * internally has to clean the pending queue (for example some signals).
*
* Locking: ctrl_lock, read_lock.
*/
static void n_tty_flush_buffer(struct tty_struct *tty)
{
- unsigned long flags;
- /* clear everything and unthrottle the driver */
- reset_buffer_flags(tty);
-
- if (!tty->link)
- return;
+ reset_buffer_flags(tty->disc_data);
+ n_tty_set_room(tty);
- spin_lock_irqsave(&tty->ctrl_lock, flags);
- if (tty->link->packet) {
- tty->ctrl_status |= TIOCPKT_FLUSHREAD;
- wake_up_interruptible(&tty->link->read_wait);
- }
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+ if (tty->link)
+ n_tty_packet_mode_flush(tty);
}
/**
* isig - handle the ISIG optio
* @sig: signal
* @tty: terminal
- * @flush: force flush
*
- * Called when a signal is being sent due to terminal input. This
- * may caus terminal flushing to take place according to the termios
- * settings and character used. Called from the driver receive_buf
- * path so serialized.
+ * Called when a signal is being sent due to terminal input.
+ * Called from the driver receive_buf path so serialized.
*
- * Locking: ctrl_lock, read_lock (both via flush buffer)
+ * Locking: ctrl_lock
*/
-static inline void isig(int sig, struct tty_struct *tty, int flush)
+static inline void isig(int sig, struct tty_struct *tty)
{
- if (tty->pgrp)
- kill_pgrp(tty->pgrp, sig, 1);
- if (flush || !L_NOFLSH(tty)) {
- n_tty_flush_buffer(tty);
- tty_driver_flush_buffer(tty);
+ struct pid *tty_pgrp = tty_get_pgrp(tty);
+ if (tty_pgrp) {
+ kill_pgrp(tty_pgrp, sig, 1);
+ put_pid(tty_pgrp);
}
}
if (I_IGNBRK(tty))
return;
if (I_BRKINT(tty)) {
- isig(SIGINT, tty, 1);
+ isig(SIGINT, tty);
+ if (!L_NOFLSH(tty)) {
+ n_tty_flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
+ }
return;
}
if (I_PARMRK(tty)) {
signal = SIGTSTP;
if (c == SUSP_CHAR(tty)) {
send_signal:
- /*
- * Note that we do not use isig() here because we want
- * the order to be:
- * 1) flush, 2) echo, 3) signal
- */
if (!L_NOFLSH(tty)) {
n_tty_flush_buffer(tty);
tty_driver_flush_buffer(tty);
echo_char(c, tty);
process_echoes(tty);
}
- if (tty->pgrp)
- kill_pgrp(tty->pgrp, signal, 1);
+ isig(signal, tty);
return;
}
}
* mode. We don't want to throttle the driver if we're in
* canonical mode and don't have a newline yet!
*/
- if (tty->receive_room < TTY_THRESHOLD_THROTTLE)
- tty_throttle(tty);
-
- /* FIXME: there is a tiny race here if the receive room check runs
- before the other work executes and empties the buffer (upping
- the receiving room and unthrottling. We then throttle and get
- stuck. This has been observed and traced down by Vincent Pillet/
- We need to address this when we sort out out the rx path locking */
+ while (1) {
+ tty_set_flow_change(tty, TTY_THROTTLE_SAFE);
+ if (tty->receive_room >= TTY_THRESHOLD_THROTTLE)
+ break;
+ if (!tty_throttle_safe(tty))
+ break;
+ }
+ __tty_set_flow_change(tty, 0);
}
int is_ignored(int sig)
{
struct n_tty_data *ldata = tty->disc_data;
- n_tty_flush_buffer(tty);
+ if (tty->link)
+ n_tty_packet_mode_flush(tty);
+
kfree(ldata->read_buf);
kfree(ldata->echo_buf);
kfree(ldata);
goto err_free_bufs;
tty->disc_data = ldata;
- reset_buffer_flags(tty);
- tty_unthrottle(tty);
+ reset_buffer_flags(tty->disc_data);
ldata->column = 0;
- n_tty_set_termios(tty, NULL);
tty->minimum_to_wake = 1;
tty->closing = 0;
+ /* indicate buffer work may resume */
+ clear_bit(TTY_LDISC_HALTED, &tty->flags);
+ n_tty_set_termios(tty, NULL);
+ tty_unthrottle(tty);
return 0;
err_free_bufs:
* and if appropriate send any needed signals and return a negative
* error code if action should be taken.
*
- * FIXME:
- * Locking: None - redirected write test is safe, testing
- * current->signal should possibly lock current->sighand
- * pgrp locking ?
+ * Locking: redirected write test is safe
+ * current->signal->tty check is safe
+ * ctrl_lock to safely reference tty->pgrp
*/
static int job_control(struct tty_struct *tty, struct file *file)
/* NOTE: not yet done after every sleep pending a thorough
check of the logic of this change. -- jlc */
/* don't stop on /dev/console */
- if (file->f_op->write != redirected_tty_write &&
- current->signal->tty == tty) {
- if (!tty->pgrp)
- printk(KERN_ERR "n_tty_read: no tty->pgrp!\n");
- else if (task_pgrp(current) != tty->pgrp) {
- if (is_ignored(SIGTTIN) ||
- is_current_pgrp_orphaned())
- return -EIO;
- kill_pgrp(task_pgrp(current), SIGTTIN, 1);
- set_thread_flag(TIF_SIGPENDING);
- return -ERESTARTSYS;
- }
+ if (file->f_op->write == redirected_tty_write ||
+ current->signal->tty != tty)
+ return 0;
+
+ spin_lock_irq(&tty->ctrl_lock);
+ if (!tty->pgrp)
+ printk(KERN_ERR "n_tty_read: no tty->pgrp!\n");
+ else if (task_pgrp(current) != tty->pgrp) {
+ spin_unlock_irq(&tty->ctrl_lock);
+ if (is_ignored(SIGTTIN) || is_current_pgrp_orphaned())
+ return -EIO;
+ kill_pgrp(task_pgrp(current), SIGTTIN, 1);
+ set_thread_flag(TIF_SIGPENDING);
+ return -ERESTARTSYS;
}
+ spin_unlock_irq(&tty->ctrl_lock);
return 0;
}
* longer than TTY_THRESHOLD_UNTHROTTLE in canonical mode,
* we won't get any more characters.
*/
- if (n_tty_chars_in_buffer(tty) <= TTY_THRESHOLD_UNTHROTTLE) {
+ while (1) {
+ tty_set_flow_change(tty, TTY_UNTHROTTLE_SAFE);
+ if (n_tty_chars_in_buffer(tty) > TTY_THRESHOLD_UNTHROTTLE)
+ break;
+ if (!tty->count)
+ break;
n_tty_set_room(tty);
- check_unthrottle(tty);
+ if (!tty_unthrottle_safe(tty))
+ break;
}
+ __tty_set_flow_change(tty, 0);
if (b - buf >= minimum)
break;
const u8 toggle = port->toggle_ul;
void __iomem *addr = port->ul_addr[toggle];
const u32 ul_size = port->ul_size[toggle];
- struct tty_struct *tty = tty_port_tty_get(&port->port);
/* Get data from tty and place in buf for now */
size = kfifo_out(&port->fifo_ul, dc->send_buf,
if (size == 0) {
DBG4("No more data to send, disable link:");
- tty_kref_put(tty);
return 0;
}
write_mem32(addr, (u32 *) &size, 4);
write_mem32(addr + 4, (u32 *) dc->send_buf, size);
- if (tty)
- tty_wakeup(tty);
+ tty_port_tty_wakeup(&port->port);
- tty_kref_put(tty);
return 1;
}
DBG1(" ");
- for (i = 0; i < MAX_PORT; ++i) {
- struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
- if (tty && list_empty(&tty->hangup_work.entry))
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ for (i = 0; i < MAX_PORT; ++i)
+ tty_port_tty_hangup(&dc->port[i].port, false);
+
/* Racy below - surely should wait for scheduled work to be done or
complete off a hangup method ? */
while (dc->open_ttys)
static void pty_cleanup(struct tty_struct *tty)
{
- tty->port->itty = NULL;
tty_port_put(tty->port);
}
/* Loop sending data to FIFO until done or FIFO full */
while (1) {
- if (tty->stopped || tty->hw_stopped)
+ if (tty->stopped)
break;
c = min(info->xmit_fifo_room, info->xmit_cnt);
c = min(c, XMIT_BUF_SIZE - info->xmit_tail);
(ChanStatus & CD_ACT) ? "on" : "off");
#endif
if (!(ChanStatus & CD_ACT) && info->cd_status) {
- struct tty_struct *tty;
#ifdef ROCKET_DEBUG_HANGUP
printk(KERN_INFO "CD drop, calling hangup.\n");
#endif
- tty = tty_port_tty_get(&info->port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&info->port, false);
}
info->cd_status = (ChanStatus & CD_ACT) ? 1 : 0;
wake_up_interruptible(&info->port.open_wait);
/* Handle transition away from B0 status */
if (!(old_termios->c_cflag & CBAUD) && (tty->termios.c_cflag & CBAUD)) {
- if (!tty->hw_stopped || !(tty->termios.c_cflag & CRTSCTS))
- sSetRTS(cp);
+ sSetRTS(cp);
sSetDTR(cp);
}
- if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios.c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
+ if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios.c_cflag & CRTSCTS))
rp_start(tty);
- }
}
static int rp_break(struct tty_struct *tty, int break_state)
spin_lock_irqsave(&info->slock, flags);
cp = &info->channel;
- if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room == 0)
+ if (!tty->stopped && info->xmit_fifo_room == 0)
info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
- if (tty->stopped || tty->hw_stopped || info->xmit_fifo_room == 0 || info->xmit_cnt != 0) {
+ if (tty->stopped || info->xmit_fifo_room == 0 || info->xmit_cnt != 0) {
info->xmit_buf[info->xmit_head++] = ch;
info->xmit_head &= XMIT_BUF_SIZE - 1;
info->xmit_cnt++;
#endif
cp = &info->channel;
- if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room < count)
+ if (!tty->stopped && info->xmit_fifo_room < count)
info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
/*
* If the write queue for the port is empty, and there is FIFO space, stuff bytes
* into FIFO. Use the write queue for temp storage.
*/
- if (!tty->stopped && !tty->hw_stopped && info->xmit_cnt == 0 && info->xmit_fifo_room > 0) {
+ if (!tty->stopped && info->xmit_cnt == 0 && info->xmit_fifo_room > 0) {
c = min(count, info->xmit_fifo_room);
b = buf;
retval += c;
}
- if ((retval > 0) && !tty->stopped && !tty->hw_stopped)
+ if ((retval > 0) && !tty->stopped)
set_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
end:
/* Enable transmitter */
local_irq_save(flags);
- if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
- !info->xmit_buf) {
+ if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf) {
local_irq_restore(flags);
return;
}
total += c;
}
- if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
+ if (info->xmit_cnt && !tty->stopped) {
/* Enable transmitter */
local_irq_disable();
#ifndef USE_INTS
change_speed(info, tty);
if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios.c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
+ !(tty->termios.c_cflag & CRTSCTS))
rs_start(tty);
- }
}
* is cleared, the machine locks up with endless interrupts.
*/
#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1)
-#elif defined(CONFIG_SBC8560)
-/*
- * WindRiver did something similarly broken on their SBC8560 board. The
- * UART tristates its IRQ output while OUT2 is clear, but they pulled
- * the interrupt line _up_ instead of down, so if we register the IRQ
- * while the UART is in that state, we die in an IRQ storm. */
-#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
#else
#define ALPHA_KLUDGE_MCR 0
#endif
if (nr_uarts > UART_NR)
nr_uarts = UART_NR;
- for (i = 0; i < nr_uarts; i++) {
+ for (i = 0; i < UART_NR; i++) {
struct uart_8250_port *up = &serial8250_ports[i];
struct uart_port *port = &up->port;
* if so, search for the first available port that does have
* console support.
*/
- if (co->index >= nr_uarts)
+ if (co->index >= UART_NR)
co->index = 0;
port = &serial8250_ports[co->index].port;
if (!port->iobase && !port->membase)
int line;
struct uart_port *port;
- for (line = 0; line < nr_uarts; line++) {
+ for (line = 0; line < UART_NR; line++) {
port = &serial8250_ports[line].port;
if (uart_match_port(p, port))
return line;
{
int i;
- for (i = 0; i < nr_uarts; i++) {
+ for (i = 0; i < UART_NR; i++) {
struct uart_8250_port *up = &serial8250_ports[i];
if (up->port.dev == &dev->dev)
/*
* First, find a port entry which matches.
*/
- for (i = 0; i < nr_uarts; i++)
+ for (i = 0; i < UART_NR; i++)
if (uart_match_port(&serial8250_ports[i].port, port))
return &serial8250_ports[i];
* free entry. We look for one which hasn't been previously
* used (indicated by zero iobase).
*/
- for (i = 0; i < nr_uarts; i++)
+ for (i = 0; i < UART_NR; i++)
if (serial8250_ports[i].port.type == PORT_UNKNOWN &&
serial8250_ports[i].port.iobase == 0)
return &serial8250_ports[i];
* That also failed. Last resort is to find any entry which
* doesn't have a real port associated with it.
*/
- for (i = 0; i < nr_uarts; i++)
+ for (i = 0; i < UART_NR; i++)
if (serial8250_ports[i].port.type == PORT_UNKNOWN)
return &serial8250_ports[i];
uart->tx_loadsz = up->tx_loadsz;
uart->capabilities = up->capabilities;
+ /* Take tx_loadsz from fifosize if it wasn't set separately */
+ if (uart->port.fifosize && !uart->tx_loadsz)
+ uart->tx_loadsz = uart->port.fifosize;
+
if (up->port.dev)
uart->port.dev = up->port.dev;
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&p->port);
- if (!uart_circ_empty(xmit) && !uart_tx_stopped(&p->port)) {
+ if (!uart_circ_empty(xmit) && !uart_tx_stopped(&p->port))
serial8250_tx_dma(p);
- uart_write_wakeup(&p->port);
- }
}
static void __dma_rx_complete(void *param)
struct circ_buf *xmit = &p->port.state->xmit;
struct dma_async_tx_descriptor *desc;
- if (dma->tx_running)
- return -EBUSY;
+ if (uart_tx_stopped(&p->port) || dma->tx_running ||
+ uart_circ_empty(xmit))
+ return 0;
dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
- if (!dma->tx_size)
- return -EINVAL;
desc = dmaengine_prep_slave_single(dma->txchan,
dma->tx_addr + xmit->tail,
struct dma_tx_state state;
int dma_status;
- /*
- * If RCVR FIFO trigger level was not reached, complete the transfer and
- * let 8250.c copy the remaining data.
- */
- if ((iir & 0x3f) == UART_IIR_RX_TIMEOUT) {
- dma_status = dmaengine_tx_status(dma->rxchan, dma->rx_cookie,
- &state);
+ dma_status = dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state);
+
+ switch (iir & 0x3f) {
+ case UART_IIR_RLSI:
+ /* 8250_core handles errors and break interrupts */
+ return -EIO;
+ case UART_IIR_RX_TIMEOUT:
+ /*
+ * If RCVR FIFO trigger level was not reached, complete the
+ * transfer and let 8250_core copy the remaining data.
+ */
if (dma_status == DMA_IN_PROGRESS) {
dmaengine_pause(dma->rxchan);
__dma_rx_complete(p);
}
return -ETIMEDOUT;
+ default:
+ break;
}
+ if (dma_status)
+ return 0;
+
desc = dmaengine_prep_slave_single(dma->rxchan, dma->rx_addr,
dma->rx_size, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
struct uart_8250_dma *dma = p->dma;
dma_cap_mask_t mask;
- dma->rxconf.src_addr = p->port.mapbase + UART_RX;
- dma->txconf.dst_addr = p->port.mapbase + UART_TX;
+ /* Default slave configuration parameters */
+ dma->rxconf.direction = DMA_DEV_TO_MEM;
+ dma->rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
+ dma->rxconf.src_addr = p->port.mapbase + UART_RX;
+
+ dma->txconf.direction = DMA_MEM_TO_DEV;
+ dma->txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
+ dma->txconf.dst_addr = p->port.mapbase + UART_TX;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
/* Get a channel for RX */
- dma->rxchan = dma_request_channel(mask, dma->fn, dma->rx_param);
+ dma->rxchan = dma_request_slave_channel_compat(mask,
+ dma->fn, dma->rx_param,
+ p->port.dev, "rx");
if (!dma->rxchan)
return -ENODEV;
dmaengine_slave_config(dma->rxchan, &dma->rxconf);
/* Get a channel for TX */
- dma->txchan = dma_request_channel(mask, dma->fn, dma->tx_param);
+ dma->txchan = dma_request_slave_channel_compat(mask,
+ dma->fn, dma->tx_param,
+ p->port.dev, "tx");
if (!dma->txchan) {
dma_release_channel(dma->rxchan);
return -ENODEV;
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include "8250.h"
#define DW_UART_CPR 0xf4 /* Component Parameter Register */
#define DW_UART_UCV 0xf8 /* UART Component Version */
-/* Intel Low Power Subsystem specific */
-#define LPSS_PRV_CLOCK_PARAMS 0x800
-
/* Component Parameter Register bits */
#define DW_UART_CPR_ABP_DATA_WIDTH (3 << 0)
#define DW_UART_CPR_AFCE_MODE (1 << 4)
struct dw8250_data {
- int last_lcr;
- int line;
+ int last_lcr;
+ int line;
+ struct clk *clk;
};
static void dw8250_serial_out(struct uart_port *p, int offset, int value)
return 0;
}
+static void
+dw8250_do_pm(struct uart_port *port, unsigned int state, unsigned int old)
+{
+ if (!state)
+ pm_runtime_get_sync(port->dev);
+
+ serial8250_do_pm(port, state, old);
+
+ if (state)
+ pm_runtime_put_sync_suspend(port->dev);
+}
+
static int dw8250_probe_of(struct uart_port *p)
{
struct device_node *np = p->dev->of_node;
if (!of_property_read_u32(np, "reg-shift", &val))
p->regshift = val;
+ /* clock got configured through clk api, all done */
+ if (p->uartclk)
+ return 0;
+
+ /* try to find out clock frequency from DT as fallback */
if (of_property_read_u32(np, "clock-frequency", &val)) {
- dev_err(p->dev, "no clock-frequency property set\n");
+ dev_err(p->dev, "clk or clock-frequency not defined\n");
return -EINVAL;
}
p->uartclk = val;
}
#ifdef CONFIG_ACPI
-static bool dw8250_acpi_dma_filter(struct dma_chan *chan, void *parm)
-{
- return chan->chan_id == *(int *)parm;
-}
-
-static acpi_status
-dw8250_acpi_walk_resource(struct acpi_resource *res, void *data)
-{
- struct uart_port *p = data;
- struct uart_8250_port *port;
- struct uart_8250_dma *dma;
- struct acpi_resource_fixed_dma *fixed_dma;
- struct dma_slave_config *slave;
-
- port = container_of(p, struct uart_8250_port, port);
-
- switch (res->type) {
- case ACPI_RESOURCE_TYPE_FIXED_DMA:
- fixed_dma = &res->data.fixed_dma;
-
- /* TX comes first */
- if (!port->dma) {
- dma = devm_kzalloc(p->dev, sizeof(*dma), GFP_KERNEL);
- if (!dma)
- return AE_NO_MEMORY;
-
- port->dma = dma;
- slave = &dma->txconf;
-
- slave->direction = DMA_MEM_TO_DEV;
- slave->dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
- slave->slave_id = fixed_dma->request_lines;
- slave->dst_maxburst = port->tx_loadsz / 4;
-
- dma->tx_chan_id = fixed_dma->channels;
- dma->tx_param = &dma->tx_chan_id;
- dma->fn = dw8250_acpi_dma_filter;
- } else {
- dma = port->dma;
- slave = &dma->rxconf;
-
- slave->direction = DMA_DEV_TO_MEM;
- slave->src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
- slave->slave_id = fixed_dma->request_lines;
- slave->src_maxburst = p->fifosize / 4;
-
- dma->rx_chan_id = fixed_dma->channels;
- dma->rx_param = &dma->rx_chan_id;
- }
-
- break;
- }
-
- return AE_OK;
-}
-
-static int dw8250_probe_acpi(struct uart_port *p)
+static int dw8250_probe_acpi(struct uart_8250_port *up)
{
const struct acpi_device_id *id;
- acpi_status status;
- u32 reg;
+ struct uart_port *p = &up->port;
id = acpi_match_device(p->dev->driver->acpi_match_table, p->dev);
if (!id)
p->serial_in = dw8250_serial_in32;
p->serial_out = dw8250_serial_out32;
p->regshift = 2;
- p->uartclk = (unsigned int)id->driver_data;
- status = acpi_walk_resources(ACPI_HANDLE(p->dev), METHOD_NAME__CRS,
- dw8250_acpi_walk_resource, p);
- if (ACPI_FAILURE(status)) {
- dev_err_ratelimited(p->dev, "%s failed \"%s\"\n", __func__,
- acpi_format_exception(status));
- return -ENODEV;
- }
+ if (!p->uartclk)
+ p->uartclk = (unsigned int)id->driver_data;
- /* Fix Haswell issue where the clocks do not get enabled */
- if (!strcmp(id->id, "INT33C4") || !strcmp(id->id, "INT33C5")) {
- reg = readl(p->membase + LPSS_PRV_CLOCK_PARAMS);
- writel(reg | 1, p->membase + LPSS_PRV_CLOCK_PARAMS);
- }
+ up->dma = devm_kzalloc(p->dev, sizeof(*up->dma), GFP_KERNEL);
+ if (!up->dma)
+ return -ENOMEM;
+
+ up->dma->rxconf.src_maxburst = p->fifosize / 4;
+ up->dma->txconf.dst_maxburst = p->fifosize / 4;
return 0;
}
#else
-static inline int dw8250_probe_acpi(struct uart_port *p)
+static inline int dw8250_probe_acpi(struct uart_8250_port *up)
{
return -ENODEV;
}
p->flags |= UPF_FIXED_TYPE;
p->fifosize = DW_UART_CPR_FIFO_SIZE(reg);
up->tx_loadsz = p->fifosize;
+ up->capabilities = UART_CAP_FIFO;
}
+
+ if (reg & DW_UART_CPR_AFCE_MODE)
+ up->capabilities |= UART_CAP_AFE;
}
static int dw8250_probe(struct platform_device *pdev)
uart.port.mapbase = regs->start;
uart.port.irq = irq->start;
uart.port.handle_irq = dw8250_handle_irq;
+ uart.port.pm = dw8250_do_pm;
uart.port.type = PORT_8250;
uart.port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
uart.port.dev = &pdev->dev;
- uart.port.membase = ioremap(regs->start, resource_size(regs));
+ uart.port.membase = devm_ioremap(&pdev->dev, regs->start,
+ resource_size(regs));
if (!uart.port.membase)
return -ENOMEM;
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->clk = devm_clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(data->clk)) {
+ clk_prepare_enable(data->clk);
+ uart.port.uartclk = clk_get_rate(data->clk);
+ }
+
uart.port.iotype = UPIO_MEM;
uart.port.serial_in = dw8250_serial_in;
uart.port.serial_out = dw8250_serial_out;
+ uart.port.private_data = data;
dw8250_setup_port(&uart);
if (err)
return err;
} else if (ACPI_HANDLE(&pdev->dev)) {
- err = dw8250_probe_acpi(&uart.port);
+ err = dw8250_probe_acpi(&uart);
if (err)
return err;
} else {
return -ENODEV;
}
- data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- uart.port.private_data = data;
-
data->line = serial8250_register_8250_port(&uart);
if (data->line < 0)
return data->line;
platform_set_drvdata(pdev, data);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
return 0;
}
{
struct dw8250_data *data = platform_get_drvdata(pdev);
+ pm_runtime_get_sync(&pdev->dev);
+
serial8250_unregister_port(data->line);
+ if (!IS_ERR(data->clk))
+ clk_disable_unprepare(data->clk);
+
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+
return 0;
}
#ifdef CONFIG_PM
-static int dw8250_suspend(struct platform_device *pdev, pm_message_t state)
+static int dw8250_suspend(struct device *dev)
{
- struct dw8250_data *data = platform_get_drvdata(pdev);
+ struct dw8250_data *data = dev_get_drvdata(dev);
serial8250_suspend_port(data->line);
return 0;
}
-static int dw8250_resume(struct platform_device *pdev)
+static int dw8250_resume(struct device *dev)
{
- struct dw8250_data *data = platform_get_drvdata(pdev);
+ struct dw8250_data *data = dev_get_drvdata(dev);
serial8250_resume_port(data->line);
return 0;
}
-#else
-#define dw8250_suspend NULL
-#define dw8250_resume NULL
#endif /* CONFIG_PM */
+#ifdef CONFIG_PM_RUNTIME
+static int dw8250_runtime_suspend(struct device *dev)
+{
+ struct dw8250_data *data = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(data->clk);
+
+ return 0;
+}
+
+static int dw8250_runtime_resume(struct device *dev)
+{
+ struct dw8250_data *data = dev_get_drvdata(dev);
+
+ clk_prepare_enable(data->clk);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops dw8250_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(dw8250_suspend, dw8250_resume)
+ SET_RUNTIME_PM_OPS(dw8250_runtime_suspend, dw8250_runtime_resume, NULL)
+};
+
static const struct of_device_id dw8250_of_match[] = {
{ .compatible = "snps,dw-apb-uart" },
{ /* Sentinel */ }
MODULE_DEVICE_TABLE(of, dw8250_of_match);
static const struct acpi_device_id dw8250_acpi_match[] = {
- { "INT33C4", 100000000 },
- { "INT33C5", 100000000 },
+ { "INT33C4", 0 },
+ { "INT33C5", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match);
.driver = {
.name = "dw-apb-uart",
.owner = THIS_MODULE,
+ .pm = &dw8250_pm_ops,
.of_match_table = dw8250_of_match,
.acpi_match_table = ACPI_PTR(dw8250_acpi_match),
},
.probe = dw8250_probe,
.remove = dw8250_remove,
- .suspend = dw8250_suspend,
- .resume = dw8250_resume,
};
module_platform_driver(dw8250_platform_driver);
* and hooked into this driver.
*/
+
#if defined(CONFIG_SERIAL_AMBA_PL011_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
struct pl011_sgbuf sgbuf_b;
dma_cookie_t cookie;
bool running;
+ struct timer_list timer;
+ unsigned int last_residue;
+ unsigned long last_jiffies;
+ bool auto_poll_rate;
+ unsigned int poll_rate;
+ unsigned int poll_timeout;
};
struct pl011_dmatx_data {
static int pl011_sgbuf_init(struct dma_chan *chan, struct pl011_sgbuf *sg,
enum dma_data_direction dir)
{
- sg->buf = kmalloc(PL011_DMA_BUFFER_SIZE, GFP_KERNEL);
+ dma_addr_t dma_addr;
+
+ sg->buf = dma_alloc_coherent(chan->device->dev,
+ PL011_DMA_BUFFER_SIZE, &dma_addr, GFP_KERNEL);
if (!sg->buf)
return -ENOMEM;
- sg_init_one(&sg->sg, sg->buf, PL011_DMA_BUFFER_SIZE);
+ sg_init_table(&sg->sg, 1);
+ sg_set_page(&sg->sg, phys_to_page(dma_addr),
+ PL011_DMA_BUFFER_SIZE, offset_in_page(dma_addr));
+ sg_dma_address(&sg->sg) = dma_addr;
- if (dma_map_sg(chan->device->dev, &sg->sg, 1, dir) != 1) {
- kfree(sg->buf);
- return -EINVAL;
- }
return 0;
}
enum dma_data_direction dir)
{
if (sg->buf) {
- dma_unmap_sg(chan->device->dev, &sg->sg, 1, dir);
- kfree(sg->buf);
+ dma_free_coherent(chan->device->dev,
+ PL011_DMA_BUFFER_SIZE, sg->buf,
+ sg_dma_address(&sg->sg));
}
}
dmaengine_slave_config(chan, &rx_conf);
uap->dmarx.chan = chan;
+ if (plat->dma_rx_poll_enable) {
+ /* Set poll rate if specified. */
+ if (plat->dma_rx_poll_rate) {
+ uap->dmarx.auto_poll_rate = false;
+ uap->dmarx.poll_rate = plat->dma_rx_poll_rate;
+ } else {
+ /*
+ * 100 ms defaults to poll rate if not
+ * specified. This will be adjusted with
+ * the baud rate at set_termios.
+ */
+ uap->dmarx.auto_poll_rate = true;
+ uap->dmarx.poll_rate = 100;
+ }
+ /* 3 secs defaults poll_timeout if not specified. */
+ if (plat->dma_rx_poll_timeout)
+ uap->dmarx.poll_timeout =
+ plat->dma_rx_poll_timeout;
+ else
+ uap->dmarx.poll_timeout = 3000;
+ } else
+ uap->dmarx.auto_poll_rate = false;
+
dev_info(uap->port.dev, "DMA channel RX %s\n",
dma_chan_name(uap->dmarx.chan));
}
struct tty_port *port = &uap->port.state->port;
struct pl011_sgbuf *sgbuf = use_buf_b ?
&uap->dmarx.sgbuf_b : &uap->dmarx.sgbuf_a;
- struct device *dev = uap->dmarx.chan->device->dev;
int dma_count = 0;
u32 fifotaken = 0; /* only used for vdbg() */
- /* Pick everything from the DMA first */
+ struct pl011_dmarx_data *dmarx = &uap->dmarx;
+ int dmataken = 0;
+
+ if (uap->dmarx.poll_rate) {
+ /* The data can be taken by polling */
+ dmataken = sgbuf->sg.length - dmarx->last_residue;
+ /* Recalculate the pending size */
+ if (pending >= dmataken)
+ pending -= dmataken;
+ }
+
+ /* Pick the remain data from the DMA */
if (pending) {
- /* Sync in buffer */
- dma_sync_sg_for_cpu(dev, &sgbuf->sg, 1, DMA_FROM_DEVICE);
/*
* First take all chars in the DMA pipe, then look in the FIFO.
* Note that tty_insert_flip_buf() tries to take as many chars
* as it can.
*/
- dma_count = tty_insert_flip_string(port, sgbuf->buf, pending);
-
- /* Return buffer to device */
- dma_sync_sg_for_device(dev, &sgbuf->sg, 1, DMA_FROM_DEVICE);
+ dma_count = tty_insert_flip_string(port, sgbuf->buf + dmataken,
+ pending);
uap->port.icount.rx += dma_count;
if (dma_count < pending)
"couldn't insert all characters (TTY is full?)\n");
}
+ /* Reset the last_residue for Rx DMA poll */
+ if (uap->dmarx.poll_rate)
+ dmarx->last_residue = sgbuf->sg.length;
+
/*
* Only continue with trying to read the FIFO if all DMA chars have
* been taken first.
writew(uap->dmacr, uap->port.membase + UART011_DMACR);
}
+/*
+ * Timer handler for Rx DMA polling.
+ * Every polling, It checks the residue in the dma buffer and transfer
+ * data to the tty. Also, last_residue is updated for the next polling.
+ */
+static void pl011_dma_rx_poll(unsigned long args)
+{
+ struct uart_amba_port *uap = (struct uart_amba_port *)args;
+ struct tty_port *port = &uap->port.state->port;
+ struct pl011_dmarx_data *dmarx = &uap->dmarx;
+ struct dma_chan *rxchan = uap->dmarx.chan;
+ unsigned long flags = 0;
+ unsigned int dmataken = 0;
+ unsigned int size = 0;
+ struct pl011_sgbuf *sgbuf;
+ int dma_count;
+ struct dma_tx_state state;
+
+ sgbuf = dmarx->use_buf_b ? &uap->dmarx.sgbuf_b : &uap->dmarx.sgbuf_a;
+ rxchan->device->device_tx_status(rxchan, dmarx->cookie, &state);
+ if (likely(state.residue < dmarx->last_residue)) {
+ dmataken = sgbuf->sg.length - dmarx->last_residue;
+ size = dmarx->last_residue - state.residue;
+ dma_count = tty_insert_flip_string(port, sgbuf->buf + dmataken,
+ size);
+ if (dma_count == size)
+ dmarx->last_residue = state.residue;
+ dmarx->last_jiffies = jiffies;
+ }
+ tty_flip_buffer_push(port);
+
+ /*
+ * If no data is received in poll_timeout, the driver will fall back
+ * to interrupt mode. We will retrigger DMA at the first interrupt.
+ */
+ if (jiffies_to_msecs(jiffies - dmarx->last_jiffies)
+ > uap->dmarx.poll_timeout) {
+
+ spin_lock_irqsave(&uap->port.lock, flags);
+ pl011_dma_rx_stop(uap);
+ spin_unlock_irqrestore(&uap->port.lock, flags);
+
+ uap->dmarx.running = false;
+ dmaengine_terminate_all(rxchan);
+ del_timer(&uap->dmarx.timer);
+ } else {
+ mod_timer(&uap->dmarx.timer,
+ jiffies + msecs_to_jiffies(uap->dmarx.poll_rate));
+ }
+}
+
static void pl011_dma_startup(struct uart_amba_port *uap)
{
int ret;
if (pl011_dma_rx_trigger_dma(uap))
dev_dbg(uap->port.dev, "could not trigger initial "
"RX DMA job, fall back to interrupt mode\n");
+ if (uap->dmarx.poll_rate) {
+ init_timer(&(uap->dmarx.timer));
+ uap->dmarx.timer.function = pl011_dma_rx_poll;
+ uap->dmarx.timer.data = (unsigned long)uap;
+ mod_timer(&uap->dmarx.timer,
+ jiffies +
+ msecs_to_jiffies(uap->dmarx.poll_rate));
+ uap->dmarx.last_residue = PL011_DMA_BUFFER_SIZE;
+ uap->dmarx.last_jiffies = jiffies;
+ }
}
}
/* Clean up the RX DMA */
pl011_sgbuf_free(uap->dmarx.chan, &uap->dmarx.sgbuf_a, DMA_FROM_DEVICE);
pl011_sgbuf_free(uap->dmarx.chan, &uap->dmarx.sgbuf_b, DMA_FROM_DEVICE);
+ if (uap->dmarx.poll_rate)
+ del_timer_sync(&uap->dmarx.timer);
uap->using_rx_dma = false;
}
}
return uap->using_rx_dma && uap->dmarx.running;
}
-
#else
/* Blank functions if the DMA engine is not available */
static inline void pl011_dma_probe(struct uart_amba_port *uap)
dev_dbg(uap->port.dev, "could not trigger RX DMA job "
"fall back to interrupt mode again\n");
uap->im |= UART011_RXIM;
- } else
+ } else {
uap->im &= ~UART011_RXIM;
+#ifdef CONFIG_DMA_ENGINE
+ /* Start Rx DMA poll */
+ if (uap->dmarx.poll_rate) {
+ uap->dmarx.last_jiffies = jiffies;
+ uap->dmarx.last_residue = PL011_DMA_BUFFER_SIZE;
+ mod_timer(&uap->dmarx.timer,
+ jiffies +
+ msecs_to_jiffies(uap->dmarx.poll_rate));
+ }
+#endif
+ }
+
writew(uap->im, uap->port.membase + UART011_IMSC);
}
spin_lock(&uap->port.lock);
unsigned int dummy_read;
spin_lock_irqsave(&uap->port.lock, flags);
-
status = readw(uap->port.membase + UART011_MIS);
if (status) {
do {
*/
baud = uart_get_baud_rate(port, termios, old, 0,
port->uartclk / clkdiv);
+#ifdef CONFIG_DMA_ENGINE
+ /*
+ * Adjust RX DMA polling rate with baud rate if not specified.
+ */
+ if (uap->dmarx.auto_poll_rate)
+ uap->dmarx.poll_rate = DIV_ROUND_UP(10000000, baud);
+#endif
if (baud > port->uartclk/16)
quot = DIV_ROUND_CLOSEST(port->uartclk * 8, baud);
/*
* Driver internal routine, used by both tty(serial core) as well as tx-isr
* -Called under spinlock in either cases
- * -also tty->stopped / tty->hw_stopped has already been checked
+ * -also tty->stopped has already been checked
* = by uart_start( ) before calling us
* = tx_ist checks that too before calling
*/
}
#endif
-#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
- defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
-static void bfin_kgdboc_port_shutdown(struct uart_port *port)
-{
- if (kgdboc_break_enabled) {
- kgdboc_break_enabled = 0;
- bfin_serial_shutdown(port);
- }
-}
-
-static int bfin_kgdboc_port_startup(struct uart_port *port)
-{
- kgdboc_port_line = port->line;
- kgdboc_break_enabled = !bfin_serial_startup(port);
- return 0;
-}
-#endif
-
static struct uart_ops bfin_serial_pops = {
.tx_empty = bfin_serial_tx_empty,
.set_mctrl = bfin_serial_set_mctrl,
.request_port = bfin_serial_request_port,
.config_port = bfin_serial_config_port,
.verify_port = bfin_serial_verify_port,
-#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
- defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
- .kgdboc_port_startup = bfin_kgdboc_port_startup,
- .kgdboc_port_shutdown = bfin_kgdboc_port_shutdown,
-#endif
#ifdef CONFIG_CONSOLE_POLL
.poll_put_char = bfin_serial_poll_put_char,
.poll_get_char = bfin_serial_poll_get_char,
#define DEF_BAUD 115200 /* 115.2 kbit/s */
-#define STD_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
#define DEF_RX 0x20 /* or SERIAL_CTRL_W >> 8 */
/* Default value of tx_ctrl register: has txd(bit 7)=1 (idle) as default */
#define DEF_TX 0x80 /* or SERIAL_CTRL_B */
.ifirstadr = R_DMA_CH7_FIRST,
.icmdadr = R_DMA_CH7_CMD,
.idescradr = R_DMA_CH7_DESCR,
- .flags = STD_FLAGS,
.rx_ctrl = DEF_RX,
.tx_ctrl = DEF_TX,
.iseteop = 2,
.ifirstadr = R_DMA_CH9_FIRST,
.icmdadr = R_DMA_CH9_CMD,
.idescradr = R_DMA_CH9_DESCR,
- .flags = STD_FLAGS,
.rx_ctrl = DEF_RX,
.tx_ctrl = DEF_TX,
.iseteop = 3,
.ifirstadr = R_DMA_CH3_FIRST,
.icmdadr = R_DMA_CH3_CMD,
.idescradr = R_DMA_CH3_DESCR,
- .flags = STD_FLAGS,
.rx_ctrl = DEF_RX,
.tx_ctrl = DEF_TX,
.iseteop = 0,
.ifirstadr = R_DMA_CH5_FIRST,
.icmdadr = R_DMA_CH5_CMD,
.idescradr = R_DMA_CH5_DESCR,
- .flags = STD_FLAGS,
.rx_ctrl = DEF_RX,
.tx_ctrl = DEF_TX,
.iseteop = 1,
*/
-static
-struct e100_serial * handle_ser_rx_interrupt_no_dma(struct e100_serial *info)
+static void handle_ser_rx_interrupt_no_dma(struct e100_serial *info)
{
unsigned long data_read;
}
tty_flip_buffer_push(&info->port);
- return info;
}
-static struct e100_serial* handle_ser_rx_interrupt(struct e100_serial *info)
+static void handle_ser_rx_interrupt(struct e100_serial *info)
{
unsigned char rstat;
#endif
/* DEBUG_LOG(info->line, "ser_interrupt stat %03X\n", rstat | (i << 8)); */
if (!info->uses_dma_in) {
- return handle_ser_rx_interrupt_no_dma(info);
+ handle_ser_rx_interrupt_no_dma(info);
+ return;
}
/* DMA is used */
rstat = info->ioport[REG_STATUS];
/* Restarting the DMA never hurts */
*info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, restart);
START_FLUSH_FAST_TIMER(info, "ser_int");
- return info;
} /* handle_ser_rx_interrupt */
static void handle_ser_tx_interrupt(struct e100_serial *info)
}
/* Normal char-by-char interrupt */
if (info->xmit.head == info->xmit.tail
- || info->port.tty->stopped
- || info->port.tty->hw_stopped) {
+ || info->port.tty->stopped) {
DFLOW(DEBUG_LOG(info->line, "tx_int: stopped %i\n",
info->port.tty->stopped));
e100_disable_serial_tx_ready_irq(info);
/* if it was already initialized, skip this */
- if (info->flags & ASYNC_INITIALIZED) {
+ if (info->port.flags & ASYNC_INITIALIZED) {
local_irq_restore(flags);
free_page(xmit_page);
return 0;
#endif /* CONFIG_SVINTO_SIM */
- info->flags |= ASYNC_INITIALIZED;
+ info->port.flags |= ASYNC_INITIALIZED;
local_irq_restore(flags);
return 0;
#endif /* CONFIG_SVINTO_SIM */
- if (!(info->flags & ASYNC_INITIALIZED))
+ if (!(info->port.flags & ASYNC_INITIALIZED))
return;
#ifdef SERIAL_DEBUG_OPEN
if (info->port.tty)
set_bit(TTY_IO_ERROR, &info->port.tty->flags);
- info->flags &= ~ASYNC_INITIALIZED;
+ info->port.flags &= ~ASYNC_INITIALIZED;
local_irq_restore(flags);
}
/* possibly, the tx/rx should be disabled first to do this safely */
/* change baud-rate and write it to the hardware */
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) {
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) {
/* Special baudrate */
u32 mask = 0xFF << (info->line*8); /* Each port has 8 bits */
unsigned long alt_source =
if (info->tr_running ||
info->xmit.head == info->xmit.tail ||
tty->stopped ||
- tty->hw_stopped ||
!info->xmit.buf)
return;
if (info->xmit.head != info->xmit.tail &&
!tty->stopped &&
- !tty->hw_stopped &&
!info->tr_running) {
start_transmit(info);
}
tmp.line = info->line;
tmp.port = (int)info->ioport;
tmp.irq = info->irq;
- tmp.flags = info->flags;
+ tmp.flags = info->port.flags;
tmp.baud_base = info->baud_base;
- tmp.close_delay = info->close_delay;
- tmp.closing_wait = info->closing_wait;
+ tmp.close_delay = info->port.close_delay;
+ tmp.closing_wait = info->port.closing_wait;
tmp.custom_divisor = info->custom_divisor;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
if (!capable(CAP_SYS_ADMIN)) {
if ((new_serial.type != info->type) ||
- (new_serial.close_delay != info->close_delay) ||
+ (new_serial.close_delay != info->port.close_delay) ||
((new_serial.flags & ~ASYNC_USR_MASK) !=
- (info->flags & ~ASYNC_USR_MASK)))
+ (info->port.flags & ~ASYNC_USR_MASK)))
return -EPERM;
- info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+ info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
(new_serial.flags & ASYNC_USR_MASK));
goto check_and_exit;
}
- if (info->count > 1)
+ if (info->port.count > 1)
return -EBUSY;
/*
*/
info->baud_base = new_serial.baud_base;
- info->flags = ((info->flags & ~ASYNC_FLAGS) |
+ info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
(new_serial.flags & ASYNC_FLAGS));
info->custom_divisor = new_serial.custom_divisor;
info->type = new_serial.type;
- info->close_delay = new_serial.close_delay;
- info->closing_wait = new_serial.closing_wait;
- info->port.low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ info->port.close_delay = new_serial.close_delay;
+ info->port.closing_wait = new_serial.closing_wait;
+ info->port.low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
check_and_exit:
- if (info->flags & ASYNC_INITIALIZED) {
+ if (info->port.flags & ASYNC_INITIALIZED) {
change_speed(info);
} else
retval = startup(info);
/* Handle turning off CRTSCTS */
if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios.c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
+ !(tty->termios.c_cflag & CRTSCTS))
rs_start(tty);
- }
}
printk("[%d] rs_close ttyS%d, count = %d\n", current->pid,
info->line, info->count);
#endif
- if ((tty->count == 1) && (info->count != 1)) {
+ if ((tty->count == 1) && (info->port.count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. Info->count should always
*/
printk(KERN_ERR
"rs_close: bad serial port count; tty->count is 1, "
- "info->count is %d\n", info->count);
- info->count = 1;
+ "info->count is %d\n", info->port.count);
+ info->port.count = 1;
}
- if (--info->count < 0) {
+ if (--info->port.count < 0) {
printk(KERN_ERR "rs_close: bad serial port count for ttyS%d: %d\n",
- info->line, info->count);
- info->count = 0;
+ info->line, info->port.count);
+ info->port.count = 0;
}
- if (info->count) {
+ if (info->port.count) {
local_irq_restore(flags);
return;
}
- info->flags |= ASYNC_CLOSING;
+ info->port.flags |= ASYNC_CLOSING;
/*
* Save the termios structure, since this port may have
* separate termios for callout and dialin.
*/
- if (info->flags & ASYNC_NORMAL_ACTIVE)
+ if (info->port.flags & ASYNC_NORMAL_ACTIVE)
info->normal_termios = tty->termios;
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
- if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, info->closing_wait);
+ if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent(tty, info->port.closing_wait);
/*
* At this point we stop accepting input. To do this, we
* disable the serial receiver and the DMA receive interrupt.
e100_disable_rx(info);
e100_disable_rx_irq(info);
- if (info->flags & ASYNC_INITIALIZED) {
+ if (info->port.flags & ASYNC_INITIALIZED) {
/*
* Before we drop DTR, make sure the UART transmitter
* has completely drained; this is especially
tty->closing = 0;
info->event = 0;
info->port.tty = NULL;
- if (info->blocked_open) {
- if (info->close_delay)
- schedule_timeout_interruptible(info->close_delay);
- wake_up_interruptible(&info->open_wait);
+ if (info->port.blocked_open) {
+ if (info->port.close_delay)
+ schedule_timeout_interruptible(info->port.close_delay);
+ wake_up_interruptible(&info->port.open_wait);
}
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&info->close_wait);
+ info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+ wake_up_interruptible(&info->port.close_wait);
local_irq_restore(flags);
/* port closed */
rs_flush_buffer(tty);
shutdown(info);
info->event = 0;
- info->count = 0;
- info->flags &= ~ASYNC_NORMAL_ACTIVE;
+ info->port.count = 0;
+ info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
info->port.tty = NULL;
- wake_up_interruptible(&info->open_wait);
+ wake_up_interruptible(&info->port.open_wait);
}
/*
* until it's done, and then try again.
*/
if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- wait_event_interruptible_tty(tty, info->close_wait,
- !(info->flags & ASYNC_CLOSING));
+ (info->port.flags & ASYNC_CLOSING)) {
+ wait_event_interruptible_tty(tty, info->port.close_wait,
+ !(info->port.flags & ASYNC_CLOSING));
#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
+ if (info->port.flags & ASYNC_HUP_NOTIFY)
return -EAGAIN;
else
return -ERESTARTSYS;
*/
if ((filp->f_flags & O_NONBLOCK) ||
(tty->flags & (1 << TTY_IO_ERROR))) {
- info->flags |= ASYNC_NORMAL_ACTIVE;
+ info->port.flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
/*
* Block waiting for the carrier detect and the line to become
* free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
+ * this loop, info->port.count is dropped by one, so that
* rs_close() knows when to free things. We restore it upon
* exit, either normal or abnormal.
*/
retval = 0;
- add_wait_queue(&info->open_wait, &wait);
+ add_wait_queue(&info->port.open_wait, &wait);
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready before block: ttyS%d, count = %d\n",
- info->line, info->count);
+ info->line, info->port.count);
#endif
local_irq_save(flags);
if (!tty_hung_up_p(filp)) {
extra_count++;
- info->count--;
+ info->port.count--;
}
local_irq_restore(flags);
- info->blocked_open++;
+ info->port.blocked_open++;
while (1) {
local_irq_save(flags);
/* assert RTS and DTR */
local_irq_restore(flags);
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) ||
- !(info->flags & ASYNC_INITIALIZED)) {
+ !(info->port.flags & ASYNC_INITIALIZED)) {
#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
+ if (info->port.flags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
#endif
break;
}
- if (!(info->flags & ASYNC_CLOSING) && do_clocal)
+ if (!(info->port.flags & ASYNC_CLOSING) && do_clocal)
/* && (do_clocal || DCD_IS_ASSERTED) */
break;
if (signal_pending(current)) {
}
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready blocking: ttyS%d, count = %d\n",
- info->line, info->count);
+ info->line, info->port.count);
#endif
tty_unlock(tty);
schedule();
tty_lock(tty);
}
set_current_state(TASK_RUNNING);
- remove_wait_queue(&info->open_wait, &wait);
+ remove_wait_queue(&info->port.open_wait, &wait);
if (extra_count)
- info->count++;
- info->blocked_open--;
+ info->port.count++;
+ info->port.blocked_open--;
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready after blocking: ttyS%d, count = %d\n",
- info->line, info->count);
+ info->line, info->port.count);
#endif
if (retval)
return retval;
- info->flags |= ASYNC_NORMAL_ACTIVE;
+ info->port.flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
#ifdef SERIAL_DEBUG_OPEN
printk("[%d] rs_open %s, count = %d\n", current->pid, tty->name,
- info->count);
+ info->port.count);
#endif
- info->count++;
+ info->port.count++;
tty->driver_data = info;
info->port.tty = tty;
- info->port.low_latency = !!(info->flags & ASYNC_LOW_LATENCY);
+ info->port.low_latency = !!(info->port.flags & ASYNC_LOW_LATENCY);
/*
* If the port is in the middle of closing, bail out now
*/
if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- wait_event_interruptible_tty(tty, info->close_wait,
- !(info->flags & ASYNC_CLOSING));
+ (info->port.flags & ASYNC_CLOSING)) {
+ wait_event_interruptible_tty(tty, info->port.close_wait,
+ !(info->port.flags & ASYNC_CLOSING));
#ifdef SERIAL_DO_RESTART
- return ((info->flags & ASYNC_HUP_NOTIFY) ?
+ return ((info->port.flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
#else
return -EAGAIN;
/*
* If DMA is enabled try to allocate the irq's.
*/
- if (info->count == 1) {
+ if (info->port.count == 1) {
allocated_resources = 1;
if (info->dma_in_enabled) {
if (request_irq(info->dma_in_irq_nbr,
if (allocated_resources)
deinit_port(info);
- /* FIXME Decrease count info->count here too? */
+ /* FIXME Decrease count info->port.count here too? */
return retval;
}
return retval;
}
- if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
+ if ((info->port.count == 1) && (info->port.flags & ASYNC_SPLIT_TERMIOS)) {
tty->termios = info->normal_termios;
change_speed(info);
}
if (info->port.tty->stopped)
seq_printf(m, " stopped:%i",
(int)info->port.tty->stopped);
- if (info->port.tty->hw_stopped)
- seq_printf(m, " hw_stopped:%i",
- (int)info->port.tty->hw_stopped);
}
{
info->forced_eop = 0;
info->baud_base = DEF_BAUD_BASE;
info->custom_divisor = 0;
- info->flags = 0;
- info->close_delay = 5*HZ/10;
- info->closing_wait = 30*HZ;
info->x_char = 0;
info->event = 0;
- info->count = 0;
- info->blocked_open = 0;
info->normal_termios = driver->init_termios;
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
info->xmit.buf = NULL;
info->xmit.tail = info->xmit.head = 0;
info->first_recv_buffer = info->last_recv_buffer = NULL;
volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */
volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */
- int flags; /* defined in tty.h */
-
u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */
u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */
u8 iseteop; /* bit number for R_SET_EOP for the input dma */
volatile int tr_running; /* 1 if output is running */
- struct tty_struct *tty;
- int read_status_mask;
- int ignore_status_mask;
int x_char; /* xon/xoff character */
- int close_delay;
- unsigned short closing_wait;
- unsigned short closing_wait2;
unsigned long event;
- unsigned long last_active;
int line;
int type; /* PORT_ETRAX */
- int count; /* # of fd on device */
- int blocked_open; /* # of blocked opens */
struct circ_buf xmit;
struct etrax_recv_buffer *first_recv_buffer;
struct etrax_recv_buffer *last_recv_buffer;
struct work_struct work;
struct async_icount icount; /* error-statistics etc.*/
struct ktermios normal_termios;
- struct ktermios callout_termios;
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
unsigned long char_time_usec; /* The time for 1 char, in usecs */
unsigned long flush_time_usec; /* How often we should flush */
struct icom_adapter *cur_adapter_entry;
struct list_head *tmp;
- icom_adapter = (struct icom_adapter *)
- kzalloc(sizeof(struct icom_adapter), GFP_KERNEL);
+ icom_adapter = kzalloc(sizeof(struct icom_adapter), GFP_KERNEL);
if (!icom_adapter) {
return -ENOMEM;
mrdy_set_high(ifx_dev);
}
-/**
- * ifx_spi_hangup - hang up an IFX device
- * @ifx_dev: our SPI device
- *
- * Hang up the tty attached to the IFX device if one is currently
- * open. If not take no action
- */
-static void ifx_spi_ttyhangup(struct ifx_spi_device *ifx_dev)
-{
- struct tty_port *pport = &ifx_dev->tty_port;
- struct tty_struct *tty = tty_port_tty_get(pport);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
-}
-
/**
* ifx_spi_timeout - SPI timeout
* @arg: our SPI device
struct ifx_spi_device *ifx_dev = (struct ifx_spi_device *)arg;
dev_warn(&ifx_dev->spi_dev->dev, "*** SPI Timeout ***");
- ifx_spi_ttyhangup(ifx_dev);
+ tty_port_tty_hangup(&ifx_dev->tty_port, false);
mrdy_set_low(ifx_dev);
clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
}
txbuffer[1] |= (more << IFX_SPI_MORE_BIT) & IFX_SPI_MORE_MASK;
}
-/**
- * ifx_spi_wakeup_serial - SPI space made
- * @port_data: our SPI device
- *
- * We have emptied the FIFO enough that we want to get more data
- * queued into it. Poke the line discipline via tty_wakeup so that
- * it will feed us more bits
- */
-static void ifx_spi_wakeup_serial(struct ifx_spi_device *ifx_dev)
-{
- struct tty_struct *tty;
-
- tty = tty_port_tty_get(&ifx_dev->tty_port);
- if (!tty)
- return;
- tty_wakeup(tty);
- tty_kref_put(tty);
-}
-
/**
* ifx_spi_prepare_tx_buffer - prepare transmit frame
* @ifx_dev: our SPI device
tx_count += temp_count;
if (temp_count == queue_length)
/* poke port to get more data */
- ifx_spi_wakeup_serial(ifx_dev);
+ tty_port_tty_wakeup(&ifx_dev->tty_port);
else /* more data in port, use next SPI message */
ifx_dev->spi_more = 1;
}
static void ifx_spi_complete(void *ctx)
{
struct ifx_spi_device *ifx_dev = ctx;
- struct tty_struct *tty;
- struct tty_ldisc *ldisc = NULL;
int length;
int actual_length;
unsigned char more;
*/
ifx_spi_power_state_clear(ifx_dev,
IFX_SPI_POWER_DATA_PENDING);
- tty = tty_port_tty_get(&ifx_dev->tty_port);
- if (tty) {
- ldisc = tty_ldisc_ref(tty);
- if (ldisc) {
- ldisc->ops->write_wakeup(tty);
- tty_ldisc_deref(ldisc);
- }
- tty_kref_put(tty);
- }
+ tty_port_tty_wakeup(&ifx_dev->tty_port);
}
}
}
set_bit(MR_INPROGRESS, &ifx_dev->mdm_reset_state);
if (!solreset) {
/* unsolicited reset */
- ifx_spi_ttyhangup(ifx_dev);
+ tty_port_tty_hangup(&ifx_dev->tty_port, false);
}
} else {
/* exited reset */
* no hardware to save state for
*/
-/**
- * ifx_spi_spi_suspend - suspend SPI on system suspend
- * @dev: device being suspended
- *
- * Suspend the SPI side. No action needed on Intel MID platforms, may
- * need extending for other systems.
- */
-static int ifx_spi_spi_suspend(struct spi_device *spi, pm_message_t msg)
-{
- return 0;
-}
-
-/**
- * ifx_spi_spi_resume - resume SPI side on system resume
- * @dev: device being suspended
- *
- * Suspend the SPI side. No action needed on Intel MID platforms, may
- * need extending for other systems.
- */
-static int ifx_spi_spi_resume(struct spi_device *spi)
-{
- return 0;
-}
-
/**
* ifx_spi_pm_suspend - suspend modem on system suspend
* @dev: device being suspended
.probe = ifx_spi_spi_probe,
.shutdown = ifx_spi_spi_shutdown,
.remove = ifx_spi_spi_remove,
- .suspend = ifx_spi_spi_suspend,
- .resume = ifx_spi_spi_resume,
.id_table = ifx_id_table
};
jsm_dbg(READ, &ch->ch_bd->pci_dev, "start 2\n");
- if (data_len <= 0) {
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- jsm_dbg(READ, &ch->ch_bd->pci_dev, "jsm_input 1\n");
- return;
- }
-
len = tty_buffer_request_room(port, data_len);
n = len;
max3100s[i]->spi = spi;
max3100s[i]->irq = spi->irq;
spin_lock_init(&max3100s[i]->conf_lock);
- dev_set_drvdata(&spi->dev, max3100s[i]);
+ spi_set_drvdata(spi, max3100s[i]);
pdata = spi->dev.platform_data;
max3100s[i]->crystal = pdata->crystal;
max3100s[i]->loopback = pdata->loopback;
static int max3100_remove(struct spi_device *spi)
{
- struct max3100_port *s = dev_get_drvdata(&spi->dev);
+ struct max3100_port *s = spi_get_drvdata(spi);
int i;
mutex_lock(&max3100s_lock);
return 0;
}
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
-static int max3100_suspend(struct spi_device *spi, pm_message_t state)
+static int max3100_suspend(struct device *dev)
{
- struct max3100_port *s = dev_get_drvdata(&spi->dev);
+ struct max3100_port *s = dev_get_drvdata(dev);
dev_dbg(&s->spi->dev, "%s\n", __func__);
return 0;
}
-static int max3100_resume(struct spi_device *spi)
+static int max3100_resume(struct device *dev)
{
- struct max3100_port *s = dev_get_drvdata(&spi->dev);
+ struct max3100_port *s = dev_get_drvdata(dev);
dev_dbg(&s->spi->dev, "%s\n", __func__);
return 0;
}
+static SIMPLE_DEV_PM_OPS(max3100_pm_ops, max3100_suspend, max3100_resume);
+#define MAX3100_PM_OPS (&max3100_pm_ops)
+
#else
-#define max3100_suspend NULL
-#define max3100_resume NULL
+#define MAX3100_PM_OPS NULL
#endif
static struct spi_driver max3100_driver = {
.driver = {
.name = "max3100",
.owner = THIS_MODULE,
+ .pm = MAX3100_PM_OPS,
},
-
.probe = max3100_probe,
.remove = max3100_remove,
- .suspend = max3100_suspend,
- .resume = max3100_resume,
};
module_spi_driver(max3100_driver);
.verify_port = max310x_verify_port,
};
-static int max310x_suspend(struct spi_device *spi, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+
+static int max310x_suspend(struct device *dev)
{
int ret;
- struct max310x_port *s = dev_get_drvdata(&spi->dev);
+ struct max310x_port *s = dev_get_drvdata(dev);
- dev_dbg(&spi->dev, "Suspend\n");
+ dev_dbg(dev, "Suspend\n");
ret = uart_suspend_port(&s->uart, &s->port);
return ret;
}
-static int max310x_resume(struct spi_device *spi)
+static int max310x_resume(struct device *dev)
{
- struct max310x_port *s = dev_get_drvdata(&spi->dev);
+ struct max310x_port *s = dev_get_drvdata(dev);
- dev_dbg(&spi->dev, "Resume\n");
+ dev_dbg(dev, "Resume\n");
if (s->pdata->suspend)
s->pdata->suspend(0);
return uart_resume_port(&s->uart, &s->port);
}
+static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume);
+#define MAX310X_PM_OPS (&max310x_pm_ops)
+
+#else
+#define MAX310X_PM_OPS NULL
+#endif
+
#ifdef CONFIG_GPIOLIB
static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset)
{
.driver = {
.name = "max310x",
.owner = THIS_MODULE,
+ .pm = MAX310X_PM_OPS,
},
.probe = max310x_probe,
.remove = max310x_remove,
- .suspend = max310x_suspend,
- .resume = max310x_resume,
.id_table = max310x_id_table,
};
module_spi_driver(max310x_driver);
.cons = &serial_m3110_console,
};
-#ifdef CONFIG_PM
-static int serial_m3110_suspend(struct spi_device *spi, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int serial_m3110_suspend(struct device *dev)
{
+ struct spi_device *spi = to_spi_device(dev);
struct uart_max3110 *max = spi_get_drvdata(spi);
disable_irq(max->irq);
return 0;
}
-static int serial_m3110_resume(struct spi_device *spi)
+static int serial_m3110_resume(struct device *dev)
{
+ struct spi_device *spi = to_spi_device(dev);
struct uart_max3110 *max = spi_get_drvdata(spi);
max3110_out(max, max->cur_conf);
enable_irq(max->irq);
return 0;
}
+
+static SIMPLE_DEV_PM_OPS(serial_m3110_pm_ops, serial_m3110_suspend,
+ serial_m3110_resume);
+#define SERIAL_M3110_PM_OPS (&serial_m3110_pm_ops)
+
#else
-#define serial_m3110_suspend NULL
-#define serial_m3110_resume NULL
+#define SERIAL_M3110_PM_OPS NULL
#endif
static int serial_m3110_probe(struct spi_device *spi)
.driver = {
.name = "spi_max3111",
.owner = THIS_MODULE,
+ .pm = SERIAL_M3110_PM_OPS,
},
.probe = serial_m3110_probe,
.remove = serial_m3110_remove,
- .suspend = serial_m3110_suspend,
- .resume = serial_m3110_resume,
};
static int __init serial_m3110_init(void)
unsigned int error_f = 0;
unsigned long flags;
unsigned int flush;
- struct tty_struct *tty;
struct tty_port *port;
struct uart_port *uport;
struct msm_hs_port *msm_uport;
clk_enable(msm_uport->clk);
port = &uport->state->port;
- tty = port->tty;
msm_hs_write(uport, UARTDM_CR_ADDR, STALE_EVENT_DISABLE);
static int smd_tty_port_activate(struct tty_port *tport, struct tty_struct *tty)
{
+ struct smd_tty_info *info = container_of(tport, struct smd_tty_info,
+ port);
int i, res = 0;
- int n = tty->index;
const char *name = NULL;
- struct smd_tty_info *info = smd_tty + n;
for (i = 0; i < smd_tty_channels_len; i++) {
- if (smd_tty_channels[i].id == n) {
+ if (smd_tty_channels[i].id == tty->index) {
name = smd_tty_channels[i].name;
break;
}
static void smd_tty_port_shutdown(struct tty_port *tport)
{
- struct smd_tty_info *info;
- struct tty_struct *tty = tty_port_tty_get(tport);
+ struct smd_tty_info *info = container_of(tport, struct smd_tty_info,
+ port);
- info = tty->driver_data;
if (info->ch) {
smd_close(info->ch);
info->ch = 0;
}
-
- tty->driver_data = 0;
- tty_kref_put(tty);
}
static int smd_tty_open(struct tty_struct *tty, struct file *f)
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/serial_core.h>
-#include <linux/serial_8250.h>
#include <linux/serial_reg.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/nwpserial.h>
#include <linux/clk.h>
+#include "8250/8250.h"
+
struct of_serial_info {
struct clk *clk;
int type;
if (of_property_read_u32(np, "reg-shift", &prop) == 0)
port->regshift = prop;
+ /* Check for fifo size */
+ if (of_property_read_u32(np, "fifo-size", &prop) == 0)
+ port->fifosize = prop;
+
port->irq = irq_of_parse_and_map(np, 0);
port->iotype = UPIO_MEM;
if (of_property_read_u32(np, "reg-io-width", &prop) == 0) {
#ifdef CONFIG_SERIAL_8250
case PORT_8250 ... PORT_MAX_8250:
{
- /* For now the of bindings don't support the extra
- 8250 specific bits */
struct uart_8250_port port8250;
memset(&port8250, 0, sizeof(port8250));
port8250.port = port;
+
+ if (port.fifosize)
+ port8250.capabilities = UART_CAP_FIFO;
+
+ if (of_property_read_bool(ofdev->dev.of_node,
+ "auto-flow-control"))
+ port8250.capabilities |= UART_CAP_AFE;
+
ret = serial8250_register_8250_port(&port8250);
break;
}
return 0;
}
-static struct uart_ops pch_uart_ops = {
- .tx_empty = pch_uart_tx_empty,
- .set_mctrl = pch_uart_set_mctrl,
- .get_mctrl = pch_uart_get_mctrl,
- .stop_tx = pch_uart_stop_tx,
- .start_tx = pch_uart_start_tx,
- .stop_rx = pch_uart_stop_rx,
- .enable_ms = pch_uart_enable_ms,
- .break_ctl = pch_uart_break_ctl,
- .startup = pch_uart_startup,
- .shutdown = pch_uart_shutdown,
- .set_termios = pch_uart_set_termios,
-/* .pm = pch_uart_pm, Not supported yet */
-/* .set_wake = pch_uart_set_wake, Not supported yet */
- .type = pch_uart_type,
- .release_port = pch_uart_release_port,
- .request_port = pch_uart_request_port,
- .config_port = pch_uart_config_port,
- .verify_port = pch_uart_verify_port
-};
-
-#ifdef CONFIG_SERIAL_PCH_UART_CONSOLE
-
/*
* Wait for transmitter & holding register to empty
*/
}
}
+#ifdef CONFIG_CONSOLE_POLL
+/*
+ * Console polling routines for communicate via uart while
+ * in an interrupt or debug context.
+ */
+static int pch_uart_get_poll_char(struct uart_port *port)
+{
+ struct eg20t_port *priv =
+ container_of(port, struct eg20t_port, port);
+ u8 lsr = ioread8(priv->membase + UART_LSR);
+
+ if (!(lsr & UART_LSR_DR))
+ return NO_POLL_CHAR;
+
+ return ioread8(priv->membase + PCH_UART_RBR);
+}
+
+
+static void pch_uart_put_poll_char(struct uart_port *port,
+ unsigned char c)
+{
+ unsigned int ier;
+ struct eg20t_port *priv =
+ container_of(port, struct eg20t_port, port);
+
+ /*
+ * First save the IER then disable the interrupts
+ */
+ ier = ioread8(priv->membase + UART_IER);
+ pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_ALL_INT);
+
+ wait_for_xmitr(priv, UART_LSR_THRE);
+ /*
+ * Send the character out.
+ * If a LF, also do CR...
+ */
+ iowrite8(c, priv->membase + PCH_UART_THR);
+ if (c == 10) {
+ wait_for_xmitr(priv, UART_LSR_THRE);
+ iowrite8(13, priv->membase + PCH_UART_THR);
+ }
+
+ /*
+ * Finally, wait for transmitter to become empty
+ * and restore the IER
+ */
+ wait_for_xmitr(priv, BOTH_EMPTY);
+ iowrite8(ier, priv->membase + UART_IER);
+}
+#endif /* CONFIG_CONSOLE_POLL */
+
+static struct uart_ops pch_uart_ops = {
+ .tx_empty = pch_uart_tx_empty,
+ .set_mctrl = pch_uart_set_mctrl,
+ .get_mctrl = pch_uart_get_mctrl,
+ .stop_tx = pch_uart_stop_tx,
+ .start_tx = pch_uart_start_tx,
+ .stop_rx = pch_uart_stop_rx,
+ .enable_ms = pch_uart_enable_ms,
+ .break_ctl = pch_uart_break_ctl,
+ .startup = pch_uart_startup,
+ .shutdown = pch_uart_shutdown,
+ .set_termios = pch_uart_set_termios,
+/* .pm = pch_uart_pm, Not supported yet */
+/* .set_wake = pch_uart_set_wake, Not supported yet */
+ .type = pch_uart_type,
+ .release_port = pch_uart_release_port,
+ .request_port = pch_uart_request_port,
+ .config_port = pch_uart_config_port,
+ .verify_port = pch_uart_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = pch_uart_get_poll_char,
+ .poll_put_char = pch_uart_put_poll_char,
+#endif
+};
+
+#ifdef CONFIG_SERIAL_PCH_UART_CONSOLE
+
static void pch_console_putchar(struct uart_port *port, int ch)
{
struct eg20t_port *priv =
#define PCH_CONSOLE (&pch_console)
#else
#define PCH_CONSOLE NULL
-#endif
+#endif /* CONFIG_SERIAL_PCH_UART_CONSOLE */
static struct uart_driver pch_uart_driver = {
.owner = THIS_MODULE,
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
+#include <linux/serial_s3c.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <asm/irq.h>
-#include <mach/hardware.h>
-
-#include <plat/regs-serial.h>
+#ifdef CONFIG_SAMSUNG_CLOCK
#include <plat/clock.h>
+#endif
#include "samsung.h"
/* Clear pending interrupts and mask all interrupts */
if (s3c24xx_serial_has_interrupt_mask(port)) {
+ free_irq(port->irq, ourport);
+
wr_regl(port, S3C64XX_UINTP, 0xf);
wr_regl(port, S3C64XX_UINTM, 0xf);
}
dbg("s3c64xx_serial_startup: port=%p (%08lx,%p)\n",
port->mapbase, port->membase);
+ wr_regl(port, S3C64XX_UINTM, 0xf);
+
ret = request_irq(port->irq, s3c64xx_serial_handle_irq, IRQF_SHARED,
s3c24xx_serial_portname(port), ourport);
if (ret) {
#define S3C24XX_SERIAL_CONSOLE NULL
#endif
-#ifdef CONFIG_CONSOLE_POLL
+#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_CONSOLE_POLL)
static int s3c24xx_serial_get_poll_char(struct uart_port *port);
static void s3c24xx_serial_put_poll_char(struct uart_port *port,
unsigned char c);
.request_port = s3c24xx_serial_request_port,
.config_port = s3c24xx_serial_config_port,
.verify_port = s3c24xx_serial_verify_port,
-#ifdef CONFIG_CONSOLE_POLL
+#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_CONSOLE_POLL)
.poll_get_char = s3c24xx_serial_get_poll_char,
.poll_put_char = s3c24xx_serial_put_poll_char,
#endif
return 0;
}
+#ifdef CONFIG_SAMSUNG_CLOCK
static ssize_t s3c24xx_serial_show_clksrc(struct device *dev,
struct device_attribute *attr,
char *buf)
}
static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL);
-
+#endif
/* Device driver serial port probe */
uart_add_one_port(&s3c24xx_uart_drv, &ourport->port);
platform_set_drvdata(pdev, &ourport->port);
+#ifdef CONFIG_SAMSUNG_CLOCK
ret = device_create_file(&pdev->dev, &dev_attr_clock_source);
if (ret < 0)
dev_err(&pdev->dev, "failed to add clock source attr.\n");
+#endif
ret = s3c24xx_serial_cpufreq_register(ourport);
if (ret < 0)
if (port) {
s3c24xx_serial_cpufreq_deregister(to_ourport(port));
+#ifdef CONFIG_SAMSUNG_CLOCK
device_remove_file(&dev->dev, &dev_attr_clock_source);
+#endif
uart_remove_one_port(&s3c24xx_uart_drv, port);
}
return 0;
}
+static int s3c24xx_serial_resume_noirq(struct device *dev)
+{
+ struct uart_port *port = s3c24xx_dev_to_port(dev);
+
+ if (port) {
+ /* restore IRQ mask */
+ if (s3c24xx_serial_has_interrupt_mask(port)) {
+ unsigned int uintm = 0xf;
+ if (tx_enabled(port))
+ uintm &= ~S3C64XX_UINTM_TXD_MSK;
+ if (rx_enabled(port))
+ uintm &= ~S3C64XX_UINTM_RXD_MSK;
+ wr_regl(port, S3C64XX_UINTM, uintm);
+ }
+ }
+
+ return 0;
+}
+
static const struct dev_pm_ops s3c24xx_serial_pm_ops = {
.suspend = s3c24xx_serial_suspend,
.resume = s3c24xx_serial_resume,
+ .resume_noirq = s3c24xx_serial_resume_noirq,
};
#define SERIAL_SAMSUNG_PM_OPS (&s3c24xx_serial_pm_ops)
return (utrstat & S3C2410_UTRSTAT_TXE) ? 1 : 0;
}
+static bool
+s3c24xx_port_configured(unsigned int ucon)
+{
+ /* consider the serial port configured if the tx/rx mode set */
+ return (ucon & 0xf) != 0;
+}
+
#ifdef CONFIG_CONSOLE_POLL
/*
* Console polling routines for writing and reading from the uart while
unsigned char c)
{
unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
+ unsigned int ucon = rd_regl(cons_uart, S3C2410_UCON);
+
+ /* not possible to xmit on unconfigured port */
+ if (!s3c24xx_port_configured(ucon))
+ return;
while (!s3c24xx_serial_console_txrdy(port, ufcon))
cpu_relax();
s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
{
unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
+ unsigned int ucon = rd_regl(cons_uart, S3C2410_UCON);
+
+ /* not possible to xmit on unconfigured port */
+ if (!s3c24xx_port_configured(ucon))
+ return;
+
while (!s3c24xx_serial_console_txrdy(port, ufcon))
barrier();
wr_regb(cons_uart, S3C2410_UTXH, ch);
"registers: ulcon=%08x, ucon=%08x, ubdriv=%08x\n",
port, ulcon, ucon, ubrdiv);
- if ((ucon & 0xf) != 0) {
- /* consider the serial port configured if the tx/rx mode set */
-
+ if (s3c24xx_port_configured(ucon)) {
switch (ulcon & S3C2410_LCON_CSMASK) {
case S3C2410_LCON_CS5:
*bits = 5;
#define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
-#ifdef CONFIG_SERIAL_SAMSUNG_DEBUG
+#if defined(CONFIG_SERIAL_SAMSUNG_DEBUG) && \
+ defined(CONFIG_DEBUG_LL) && \
+ !defined(MODULE)
extern void printascii(const char *);
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
+#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/module.h>
}
u->mapbase = resource->start;
- u->membase = devm_request_and_ioremap(&pdev->dev, resource);
- if (!u->membase) {
- dev_err(&pdev->dev, "memregion/iomap address req failed\n");
- return -EADDRNOTAVAIL;
- }
+ u->membase = devm_ioremap_resource(&pdev->dev, resource);
+ if (IS_ERR(u->membase))
+ return PTR_ERR(u->membase);
tup->uart_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(tup->uart_clk)) {
defined(CONFIG_CPU_SUBTYPE_SH7720) || \
defined(CONFIG_CPU_SUBTYPE_SH7721) || \
defined(CONFIG_ARCH_SH73A0) || \
- defined(CONFIG_ARCH_SH7367) || \
- defined(CONFIG_ARCH_SH7377) || \
defined(CONFIG_ARCH_SH7372) || \
defined(CONFIG_ARCH_R8A7740)
flag = TTY_FRAME;
}
- if (uart_handle_sysrq_char(&up->port, ch))
+ if (uart_handle_sysrq_char(&up->port, ch) || !port)
continue;
if ((stat->sreg.isr0 & (up->port.ignore_status_mask & 0xff)) == 0 &&
else if (r1 & CRC_ERR)
flag = TTY_FRAME;
}
- if (uart_handle_sysrq_char(&up->port, ch))
+ if (uart_handle_sysrq_char(&up->port, ch) || !port)
continue;
if (up->port.ignore_status_mask == 0xff ||
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/of.h>
+#include <linux/err.h>
/*
* UART Register offsets
if (!vt8500_port)
return -ENOMEM;
- vt8500_port->uart.membase = devm_request_and_ioremap(&pdev->dev, mmres);
- if (!vt8500_port->uart.membase)
- return -EADDRNOTAVAIL;
+ vt8500_port->uart.membase = devm_ioremap_resource(&pdev->dev, mmres);
+ if (IS_ERR(vt8500_port->uart.membase))
+ return PTR_ERR(vt8500_port->uart.membase);
vt8500_port->clk = of_clk_get(pdev->dev.of_node, 0);
if (IS_ERR(vt8500_port->clk)) {
xuartps_writel(XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_PARITY |
XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN |
XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT, XUARTPS_IER_OFFSET);
- xuartps_writel(~(XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_PARITY |
- XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVERRUN |
- XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT), XUARTPS_IDR_OFFSET);
return retval;
}
container_of(work, struct mgsl_struct, task);
int action;
- if (!info)
- return;
-
if ( debug_level >= DEBUG_LEVEL_BH )
printk( "%s(%d):mgsl_bh_handler(%s) entry\n",
__FILE__,__LINE__,info->device_name);
port->blocked_open++;
while (1) {
- if (tty->termios.c_cflag & CBAUD)
+ if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags))
tty_port_raise_dtr_rts(port);
set_current_state(TASK_INTERRUPTIBLE);
port->blocked_open++;
while (1) {
- if ((tty->termios.c_cflag & CBAUD))
+ if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags))
tty_port_raise_dtr_rts(port);
set_current_state(TASK_INTERRUPTIBLE);
port->blocked_open++;
while (1) {
- if (tty->termios.c_cflag & CBAUD)
+ if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags))
tty_port_raise_dtr_rts(port);
set_current_state(TASK_INTERRUPTIBLE);
}
static struct sysrq_key_op sysrq_SAK_op = {
.handler = sysrq_handle_SAK,
- .help_msg = "saK",
+ .help_msg = "sak(k)",
.action_msg = "SAK",
.enable_mask = SYSRQ_ENABLE_KEYBOARD,
};
static struct sysrq_key_op sysrq_unraw_op = {
.handler = sysrq_handle_unraw,
- .help_msg = "unRaw",
+ .help_msg = "unraw(r)",
.action_msg = "Keyboard mode set to system default",
.enable_mask = SYSRQ_ENABLE_KEYBOARD,
};
}
static struct sysrq_key_op sysrq_crash_op = {
.handler = sysrq_handle_crash,
- .help_msg = "Crash",
+ .help_msg = "crash(c)",
.action_msg = "Trigger a crash",
.enable_mask = SYSRQ_ENABLE_DUMP,
};
}
static struct sysrq_key_op sysrq_reboot_op = {
.handler = sysrq_handle_reboot,
- .help_msg = "reBoot",
+ .help_msg = "reboot(b)",
.action_msg = "Resetting",
.enable_mask = SYSRQ_ENABLE_BOOT,
};
}
static struct sysrq_key_op sysrq_sync_op = {
.handler = sysrq_handle_sync,
- .help_msg = "Sync",
+ .help_msg = "sync(s)",
.action_msg = "Emergency Sync",
.enable_mask = SYSRQ_ENABLE_SYNC,
};
static struct sysrq_key_op sysrq_show_timers_op = {
.handler = sysrq_handle_show_timers,
- .help_msg = "show-all-timers(Q)",
+ .help_msg = "show-all-timers(q)",
.action_msg = "Show clockevent devices & pending hrtimers (no others)",
};
}
static struct sysrq_key_op sysrq_mountro_op = {
.handler = sysrq_handle_mountro,
- .help_msg = "Unmount",
+ .help_msg = "unmount(u)",
.action_msg = "Emergency Remount R/O",
.enable_mask = SYSRQ_ENABLE_REMOUNT,
};
static struct sysrq_key_op sysrq_showlocks_op = {
.handler = sysrq_handle_showlocks,
- .help_msg = "show-all-locks(D)",
+ .help_msg = "show-all-locks(d)",
.action_msg = "Show Locks Held",
};
#else
static struct sysrq_key_op sysrq_showallcpus_op = {
.handler = sysrq_handle_showallcpus,
- .help_msg = "show-backtrace-all-active-cpus(L)",
+ .help_msg = "show-backtrace-all-active-cpus(l)",
.action_msg = "Show backtrace of all active CPUs",
.enable_mask = SYSRQ_ENABLE_DUMP,
};
}
static struct sysrq_key_op sysrq_showregs_op = {
.handler = sysrq_handle_showregs,
- .help_msg = "show-registers(P)",
+ .help_msg = "show-registers(p)",
.action_msg = "Show Regs",
.enable_mask = SYSRQ_ENABLE_DUMP,
};
}
static struct sysrq_key_op sysrq_showstate_op = {
.handler = sysrq_handle_showstate,
- .help_msg = "show-task-states(T)",
+ .help_msg = "show-task-states(t)",
.action_msg = "Show State",
.enable_mask = SYSRQ_ENABLE_DUMP,
};
}
static struct sysrq_key_op sysrq_showstate_blocked_op = {
.handler = sysrq_handle_showstate_blocked,
- .help_msg = "show-blocked-tasks(W)",
+ .help_msg = "show-blocked-tasks(w)",
.action_msg = "Show Blocked State",
.enable_mask = SYSRQ_ENABLE_DUMP,
};
}
static struct sysrq_key_op sysrq_ftrace_dump_op = {
.handler = sysrq_ftrace_dump,
- .help_msg = "dump-ftrace-buffer(Z)",
+ .help_msg = "dump-ftrace-buffer(z)",
.action_msg = "Dump ftrace buffer",
.enable_mask = SYSRQ_ENABLE_DUMP,
};
}
static struct sysrq_key_op sysrq_showmem_op = {
.handler = sysrq_handle_showmem,
- .help_msg = "show-memory-usage(M)",
+ .help_msg = "show-memory-usage(m)",
.action_msg = "Show Memory",
.enable_mask = SYSRQ_ENABLE_DUMP,
};
}
static struct sysrq_key_op sysrq_term_op = {
.handler = sysrq_handle_term,
- .help_msg = "terminate-all-tasks(E)",
+ .help_msg = "terminate-all-tasks(e)",
.action_msg = "Terminate All Tasks",
.enable_mask = SYSRQ_ENABLE_SIGNAL,
};
}
static struct sysrq_key_op sysrq_moom_op = {
.handler = sysrq_handle_moom,
- .help_msg = "memory-full-oom-kill(F)",
+ .help_msg = "memory-full-oom-kill(f)",
.action_msg = "Manual OOM execution",
.enable_mask = SYSRQ_ENABLE_SIGNAL,
};
}
static struct sysrq_key_op sysrq_thaw_op = {
.handler = sysrq_handle_thaw,
- .help_msg = "thaw-filesystems(J)",
+ .help_msg = "thaw-filesystems(j)",
.action_msg = "Emergency Thaw of all frozen filesystems",
.enable_mask = SYSRQ_ENABLE_SIGNAL,
};
}
static struct sysrq_key_op sysrq_kill_op = {
.handler = sysrq_handle_kill,
- .help_msg = "kill-all-tasks(I)",
+ .help_msg = "kill-all-tasks(i)",
.action_msg = "Kill All Tasks",
.enable_mask = SYSRQ_ENABLE_SIGNAL,
};
}
static struct sysrq_key_op sysrq_unrt_op = {
.handler = sysrq_handle_unrt,
- .help_msg = "nice-all-RT-tasks(N)",
+ .help_msg = "nice-all-RT-tasks(n)",
.action_msg = "Nice All RT Tasks",
.enable_mask = SYSRQ_ENABLE_RTNICE,
};
tty_buffer_free(port, head);
continue;
}
- /* Ldisc or user is trying to flush the buffers
- we are feeding to the ldisc, stop feeding the
- line discipline as we want to empty the queue */
- if (test_bit(TTYP_FLUSHPENDING, &port->iflags))
- break;
if (!tty->receive_room)
break;
if (count > tty->receive_room)
disc->ops->receive_buf(tty, char_buf,
flag_buf, count);
spin_lock_irqsave(&buf->lock, flags);
+ /* Ldisc or user is trying to flush the buffers.
+ We may have a deferred request to flush the
+ input buffer, if so pull the chain under the lock
+ and empty the queue */
+ if (test_bit(TTYP_FLUSHPENDING, &port->iflags)) {
+ __tty_buffer_flush(port);
+ clear_bit(TTYP_FLUSHPENDING, &port->iflags);
+ wake_up(&tty->read_wait);
+ break;
+ }
}
clear_bit(TTYP_FLUSHING, &port->iflags);
}
- /* We may have a deferred request to flush the input buffer,
- if so pull the chain under the lock and empty the queue */
- if (test_bit(TTYP_FLUSHPENDING, &port->iflags)) {
- __tty_buffer_flush(port);
- clear_bit(TTYP_FLUSHPENDING, &port->iflags);
- wake_up(&tty->read_wait);
- }
spin_unlock_irqrestore(&buf->lock, flags);
tty_ldisc_deref(disc);
EXPORT_SYMBOL_GPL(tty_wakeup);
+/**
+ * tty_signal_session_leader - sends SIGHUP to session leader
+ * @tty controlling tty
+ * @exit_session if non-zero, signal all foreground group processes
+ *
+ * Send SIGHUP and SIGCONT to the session leader and its process group.
+ * Optionally, signal all processes in the foreground process group.
+ *
+ * Returns the number of processes in the session with this tty
+ * as their controlling terminal. This value is used to drop
+ * tty references for those processes.
+ */
+static int tty_signal_session_leader(struct tty_struct *tty, int exit_session)
+{
+ struct task_struct *p;
+ int refs = 0;
+ struct pid *tty_pgrp = NULL;
+
+ read_lock(&tasklist_lock);
+ if (tty->session) {
+ do_each_pid_task(tty->session, PIDTYPE_SID, p) {
+ spin_lock_irq(&p->sighand->siglock);
+ if (p->signal->tty == tty) {
+ p->signal->tty = NULL;
+ /* We defer the dereferences outside fo
+ the tasklist lock */
+ refs++;
+ }
+ if (!p->signal->leader) {
+ spin_unlock_irq(&p->sighand->siglock);
+ continue;
+ }
+ __group_send_sig_info(SIGHUP, SEND_SIG_PRIV, p);
+ __group_send_sig_info(SIGCONT, SEND_SIG_PRIV, p);
+ put_pid(p->signal->tty_old_pgrp); /* A noop */
+ spin_lock(&tty->ctrl_lock);
+ tty_pgrp = get_pid(tty->pgrp);
+ if (tty->pgrp)
+ p->signal->tty_old_pgrp = get_pid(tty->pgrp);
+ spin_unlock(&tty->ctrl_lock);
+ spin_unlock_irq(&p->sighand->siglock);
+ } while_each_pid_task(tty->session, PIDTYPE_SID, p);
+ }
+ read_unlock(&tasklist_lock);
+
+ if (tty_pgrp) {
+ if (exit_session)
+ kill_pgrp(tty_pgrp, SIGHUP, exit_session);
+ put_pid(tty_pgrp);
+ }
+
+ return refs;
+}
+
/**
* __tty_hangup - actual handler for hangup events
* @work: tty device
* tasklist_lock to walk task list for hangup event
* ->siglock to protect ->signal/->sighand
*/
-static void __tty_hangup(struct tty_struct *tty)
+static void __tty_hangup(struct tty_struct *tty, int exit_session)
{
struct file *cons_filp = NULL;
struct file *filp, *f = NULL;
- struct task_struct *p;
struct tty_file_private *priv;
int closecount = 0, n;
- unsigned long flags;
- int refs = 0;
+ int refs;
if (!tty)
return;
}
spin_unlock(&tty_files_lock);
+ refs = tty_signal_session_leader(tty, exit_session);
+ /* Account for the p->signal references we killed */
+ while (refs--)
+ tty_kref_put(tty);
+
/*
* it drops BTM and thus races with reopen
* we protect the race by TTY_HUPPING
*/
tty_ldisc_hangup(tty);
- read_lock(&tasklist_lock);
- if (tty->session) {
- do_each_pid_task(tty->session, PIDTYPE_SID, p) {
- spin_lock_irq(&p->sighand->siglock);
- if (p->signal->tty == tty) {
- p->signal->tty = NULL;
- /* We defer the dereferences outside fo
- the tasklist lock */
- refs++;
- }
- if (!p->signal->leader) {
- spin_unlock_irq(&p->sighand->siglock);
- continue;
- }
- __group_send_sig_info(SIGHUP, SEND_SIG_PRIV, p);
- __group_send_sig_info(SIGCONT, SEND_SIG_PRIV, p);
- put_pid(p->signal->tty_old_pgrp); /* A noop */
- spin_lock_irqsave(&tty->ctrl_lock, flags);
- if (tty->pgrp)
- p->signal->tty_old_pgrp = get_pid(tty->pgrp);
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
- spin_unlock_irq(&p->sighand->siglock);
- } while_each_pid_task(tty->session, PIDTYPE_SID, p);
- }
- read_unlock(&tasklist_lock);
-
- spin_lock_irqsave(&tty->ctrl_lock, flags);
+ spin_lock_irq(&tty->ctrl_lock);
clear_bit(TTY_THROTTLED, &tty->flags);
clear_bit(TTY_PUSH, &tty->flags);
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
tty->session = NULL;
tty->pgrp = NULL;
tty->ctrl_status = 0;
- spin_unlock_irqrestore(&tty->ctrl_lock, flags);
-
- /* Account for the p->signal references we killed */
- while (refs--)
- tty_kref_put(tty);
+ spin_unlock_irq(&tty->ctrl_lock);
/*
* If one of the devices matches a console pointer, we
*/
set_bit(TTY_HUPPED, &tty->flags);
clear_bit(TTY_HUPPING, &tty->flags);
- tty_ldisc_enable(tty);
tty_unlock(tty);
struct tty_struct *tty =
container_of(work, struct tty_struct, hangup_work);
- __tty_hangup(tty);
+ __tty_hangup(tty, 0);
}
/**
printk(KERN_DEBUG "%s vhangup...\n", tty_name(tty, buf));
#endif
- __tty_hangup(tty);
+ __tty_hangup(tty, 0);
}
EXPORT_SYMBOL(tty_vhangup);
}
}
+/**
+ * tty_vhangup_session - hangup session leader exit
+ * @tty: tty to hangup
+ *
+ * The session leader is exiting and hanging up its controlling terminal.
+ * Every process in the foreground process group is signalled SIGHUP.
+ *
+ * We do this synchronously so that when the syscall returns the process
+ * is complete. That guarantee is necessary for security reasons.
+ */
+
+static void tty_vhangup_session(struct tty_struct *tty)
+{
+#ifdef TTY_DEBUG_HANGUP
+ char buf[64];
+
+ printk(KERN_DEBUG "%s vhangup session...\n", tty_name(tty, buf));
+#endif
+ __tty_hangup(tty, 1);
+}
+
/**
* tty_hung_up_p - was tty hung up
* @filp: file pointer of tty
tty = get_current_tty();
if (tty) {
- struct pid *tty_pgrp = get_pid(tty->pgrp);
- if (on_exit) {
- if (tty->driver->type != TTY_DRIVER_TYPE_PTY)
- tty_vhangup(tty);
- }
- tty_kref_put(tty);
- if (tty_pgrp) {
- kill_pgrp(tty_pgrp, SIGHUP, on_exit);
- if (!on_exit)
+ if (on_exit && tty->driver->type != TTY_DRIVER_TYPE_PTY) {
+ tty_vhangup_session(tty);
+ } else {
+ struct pid *tty_pgrp = tty_get_pgrp(tty);
+ if (tty_pgrp) {
+ kill_pgrp(tty_pgrp, SIGHUP, on_exit);
kill_pgrp(tty_pgrp, SIGCONT, on_exit);
- put_pid(tty_pgrp);
+ put_pid(tty_pgrp);
+ }
}
+ tty_kref_put(tty);
+
} else if (on_exit) {
struct pid *old_pgrp;
spin_lock_irq(¤t->sighand->siglock);
}
tty->count++;
- mutex_lock(&tty->ldisc_mutex);
WARN_ON(!test_bit(TTY_LDISC, &tty->flags));
- mutex_unlock(&tty->ldisc_mutex);
return 0;
}
}
EXPORT_SYMBOL(tty_free_termios);
+/**
+ * tty_flush_works - flush all works of a tty
+ * @tty: tty device to flush works for
+ *
+ * Sync flush all works belonging to @tty.
+ */
+static void tty_flush_works(struct tty_struct *tty)
+{
+ flush_work(&tty->SAK_work);
+ flush_work(&tty->hangup_work);
+}
/**
* release_one_tty - release tty structure memory
tty_free_termios(tty);
tty_driver_remove_tty(tty->driver, tty);
tty->port->itty = NULL;
+ cancel_work_sync(&tty->port->buf.work);
if (tty->link)
tty_kref_put(tty->link);
return 0;
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s: freeing tty structure...\n", __func__);
+ printk(KERN_DEBUG "%s: %s: final close\n", __func__, tty_name(tty, buf));
#endif
/*
* Ask the line discipline code to release its structures
*/
tty_ldisc_release(tty, o_tty);
+
+ /* Wait for pending work before tty destruction commmences */
+ tty_flush_works(tty);
+ if (o_tty)
+ tty_flush_works(o_tty);
+
+#ifdef TTY_DEBUG_HANGUP
+ printk(KERN_DEBUG "%s: %s: freeing structure...\n", __func__, tty_name(tty, buf));
+#endif
/*
* The release_tty function takes care of the details of clearing
* the slots and preserving the termios structure. The tty_unlock_pair
if (!test_and_set_bit(TTY_THROTTLED, &tty->flags) &&
tty->ops->throttle)
tty->ops->throttle(tty);
+ tty->flow_change = 0;
mutex_unlock(&tty->termios_mutex);
}
EXPORT_SYMBOL(tty_throttle);
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) &&
tty->ops->unthrottle)
tty->ops->unthrottle(tty);
+ tty->flow_change = 0;
mutex_unlock(&tty->termios_mutex);
}
EXPORT_SYMBOL(tty_unthrottle);
+/**
+ * tty_throttle_safe - flow control
+ * @tty: terminal
+ *
+ * Similar to tty_throttle() but will only attempt throttle
+ * if tty->flow_change is TTY_THROTTLE_SAFE. Prevents an accidental
+ * throttle due to race conditions when throttling is conditional
+ * on factors evaluated prior to throttling.
+ *
+ * Returns 0 if tty is throttled (or was already throttled)
+ */
+
+int tty_throttle_safe(struct tty_struct *tty)
+{
+ int ret = 0;
+
+ mutex_lock(&tty->termios_mutex);
+ if (!test_bit(TTY_THROTTLED, &tty->flags)) {
+ if (tty->flow_change != TTY_THROTTLE_SAFE)
+ ret = 1;
+ else {
+ __set_bit(TTY_THROTTLED, &tty->flags);
+ if (tty->ops->throttle)
+ tty->ops->throttle(tty);
+ }
+ }
+ mutex_unlock(&tty->termios_mutex);
+
+ return ret;
+}
+
+/**
+ * tty_unthrottle_safe - flow control
+ * @tty: terminal
+ *
+ * Similar to tty_unthrottle() but will only attempt unthrottle
+ * if tty->flow_change is TTY_UNTHROTTLE_SAFE. Prevents an accidental
+ * unthrottle due to race conditions when unthrottling is conditional
+ * on factors evaluated prior to unthrottling.
+ *
+ * Returns 0 if tty is unthrottled (or was already unthrottled)
+ */
+
+int tty_unthrottle_safe(struct tty_struct *tty)
+{
+ int ret = 0;
+
+ mutex_lock(&tty->termios_mutex);
+ if (test_bit(TTY_THROTTLED, &tty->flags)) {
+ if (tty->flow_change != TTY_UNTHROTTLE_SAFE)
+ ret = 1;
+ else {
+ __clear_bit(TTY_THROTTLED, &tty->flags);
+ if (tty->ops->unthrottle)
+ tty->ops->unthrottle(tty);
+ }
+ }
+ mutex_unlock(&tty->termios_mutex);
+
+ return ret;
+}
+
/**
* tty_wait_until_sent - wait for I/O to finish
* @tty: tty we are waiting for
}
EXPORT_SYMBOL_GPL(tty_encode_baud_rate);
-/**
- * tty_get_baud_rate - get tty bit rates
- * @tty: tty to query
- *
- * Returns the baud rate as an integer for this terminal. The
- * termios lock must be held by the caller and the terminal bit
- * flags may be updated.
- *
- * Locking: none
- */
-
-speed_t tty_get_baud_rate(struct tty_struct *tty)
-{
- speed_t baud = tty_termios_baud_rate(&tty->termios);
-
- if (baud == 38400 && tty->alt_speed) {
- if (!tty->warned) {
- printk(KERN_WARNING "Use of setserial/setrocket to "
- "set SPD_* flags is deprecated\n");
- tty->warned = 1;
- }
- baud = tty->alt_speed;
- }
-
- return baud;
-}
-EXPORT_SYMBOL(tty_get_baud_rate);
-
/**
* tty_termios_copy_hw - copy hardware settings
* @new: New termios
}
EXPORT_SYMBOL_GPL(tty_mode_ioctl);
-int tty_perform_flush(struct tty_struct *tty, unsigned long arg)
+
+/* Caller guarantees ldisc reference is held */
+static int __tty_perform_flush(struct tty_struct *tty, unsigned long arg)
{
- struct tty_ldisc *ld;
- int retval = tty_check_change(tty);
- if (retval)
- return retval;
+ struct tty_ldisc *ld = tty->ldisc;
- ld = tty_ldisc_ref_wait(tty);
switch (arg) {
case TCIFLUSH:
if (ld && ld->ops->flush_buffer) {
tty_driver_flush_buffer(tty);
break;
default:
- tty_ldisc_deref(ld);
return -EINVAL;
}
- tty_ldisc_deref(ld);
return 0;
}
+
+int tty_perform_flush(struct tty_struct *tty, unsigned long arg)
+{
+ struct tty_ldisc *ld;
+ int retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+
+ ld = tty_ldisc_ref_wait(tty);
+ retval = __tty_perform_flush(tty, arg);
+ if (ld)
+ tty_ldisc_deref(ld);
+ return retval;
+}
EXPORT_SYMBOL_GPL(tty_perform_flush);
int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
}
return 0;
case TCFLSH:
- return tty_perform_flush(tty, arg);
+ return __tty_perform_flush(tty, arg);
default:
/* Try the mode commands */
return tty_mode_ioctl(tty, file, cmd, arg);
#include <linux/uaccess.h>
#include <linux/ratelimit.h>
+#undef LDISC_DEBUG_HANGUP
+
+#ifdef LDISC_DEBUG_HANGUP
+#define tty_ldisc_debug(tty, f, args...) ({ \
+ char __b[64]; \
+ printk(KERN_DEBUG "%s: %s: " f, __func__, tty_name(tty, __b), ##args); \
+})
+#else
+#define tty_ldisc_debug(tty, f, args...)
+#endif
+
/*
* This guards the refcounted line discipline lists. The lock
* must be taken with irqs off because there are hangup path
/* Line disc dispatch table */
static struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS];
-static inline struct tty_ldisc *get_ldisc(struct tty_ldisc *ld)
-{
- if (ld)
- atomic_inc(&ld->users);
- return ld;
-}
-
-static void put_ldisc(struct tty_ldisc *ld)
-{
- unsigned long flags;
-
- if (WARN_ON_ONCE(!ld))
- return;
-
- /*
- * If this is the last user, free the ldisc, and
- * release the ldisc ops.
- *
- * We really want an "atomic_dec_and_raw_lock_irqsave()",
- * but we don't have it, so this does it by hand.
- */
- raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
- if (atomic_dec_and_test(&ld->users)) {
- struct tty_ldisc_ops *ldo = ld->ops;
-
- ldo->refcount--;
- module_put(ldo->owner);
- raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
-
- kfree(ld);
- return;
- }
- raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
-
- if (waitqueue_active(&ld->wq_idle))
- wake_up(&ld->wq_idle);
-}
-
/**
* tty_register_ldisc - install a line discipline
* @disc: ldisc number
return ld;
}
+/**
+ * tty_ldisc_put - release the ldisc
+ *
+ * Complement of tty_ldisc_get().
+ */
+static inline void tty_ldisc_put(struct tty_ldisc *ld)
+{
+ unsigned long flags;
+
+ if (WARN_ON_ONCE(!ld))
+ return;
+
+ raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
+
+ /* unreleased reader reference(s) will cause this WARN */
+ WARN_ON(!atomic_dec_and_test(&ld->users));
+
+ ld->ops->refcount--;
+ module_put(ld->ops->owner);
+ kfree(ld);
+ raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+}
+
static void *tty_ldiscs_seq_start(struct seq_file *m, loff_t *pos)
{
return (*pos < NR_LDISCS) ? pos : NULL;
.release = seq_release,
};
-/**
- * tty_ldisc_assign - set ldisc on a tty
- * @tty: tty to assign
- * @ld: line discipline
- *
- * Install an instance of a line discipline into a tty structure. The
- * ldisc must have a reference count above zero to ensure it remains.
- * The tty instance refcount starts at zero.
- *
- * Locking:
- * Caller must hold references
- */
-
-static void tty_ldisc_assign(struct tty_struct *tty, struct tty_ldisc *ld)
-{
- tty->ldisc = ld;
-}
-
/**
* tty_ldisc_try - internal helper
* @tty: the tty
unsigned long flags;
struct tty_ldisc *ld;
+ /* FIXME: this allows reference acquire after TTY_LDISC is cleared */
raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
ld = NULL;
- if (test_bit(TTY_LDISC, &tty->flags))
- ld = get_ldisc(tty->ldisc);
+ if (test_bit(TTY_LDISC, &tty->flags) && tty->ldisc) {
+ ld = tty->ldisc;
+ atomic_inc(&ld->users);
+ }
raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
return ld;
}
void tty_ldisc_deref(struct tty_ldisc *ld)
{
- put_ldisc(ld);
-}
-EXPORT_SYMBOL_GPL(tty_ldisc_deref);
+ unsigned long flags;
-static inline void tty_ldisc_put(struct tty_ldisc *ld)
-{
- put_ldisc(ld);
+ if (WARN_ON_ONCE(!ld))
+ return;
+
+ raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
+ /*
+ * WARNs if one-too-many reader references were released
+ * - the last reference must be released with tty_ldisc_put
+ */
+ WARN_ON(atomic_dec_and_test(&ld->users));
+ raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+
+ if (waitqueue_active(&ld->wq_idle))
+ wake_up(&ld->wq_idle);
}
+EXPORT_SYMBOL_GPL(tty_ldisc_deref);
/**
* tty_ldisc_enable - allow ldisc use
* Clearing directly is allowed.
*/
-void tty_ldisc_enable(struct tty_struct *tty)
+static void tty_ldisc_enable(struct tty_struct *tty)
{
+ clear_bit(TTY_LDISC_HALTED, &tty->flags);
set_bit(TTY_LDISC, &tty->flags);
clear_bit(TTY_LDISC_CHANGING, &tty->flags);
wake_up(&tty_ldisc_wait);
/* There is an outstanding reference here so this is safe */
old = tty_ldisc_get(old->ops->num);
WARN_ON(IS_ERR(old));
- tty_ldisc_assign(tty, old);
+ tty->ldisc = old;
tty_set_termios_ldisc(tty, old->ops->num);
if (tty_ldisc_open(tty, old) < 0) {
tty_ldisc_put(old);
new_ldisc = tty_ldisc_get(N_TTY);
if (IS_ERR(new_ldisc))
panic("n_tty: get");
- tty_ldisc_assign(tty, new_ldisc);
+ tty->ldisc = new_ldisc;
tty_set_termios_ldisc(tty, N_TTY);
r = tty_ldisc_open(tty, new_ldisc);
if (r < 0)
}
}
+/**
+ * tty_ldisc_wait_idle - wait for the ldisc to become idle
+ * @tty: tty to wait for
+ * @timeout: for how long to wait at most
+ *
+ * Wait for the line discipline to become idle. The discipline must
+ * have been halted for this to guarantee it remains idle.
+ */
+static int tty_ldisc_wait_idle(struct tty_struct *tty, long timeout)
+{
+ long ret;
+ ret = wait_event_timeout(tty->ldisc->wq_idle,
+ atomic_read(&tty->ldisc->users) == 1, timeout);
+ return ret > 0 ? 0 : -EBUSY;
+}
+
/**
* tty_ldisc_halt - shut down the line discipline
* @tty: tty device
+ * @o_tty: paired pty device (can be NULL)
+ * @timeout: # of jiffies to wait for ldisc refs to be released
*
- * Shut down the line discipline and work queue for this tty device.
- * The TTY_LDISC flag being cleared ensures no further references can
- * be obtained while the delayed work queue halt ensures that no more
- * data is fed to the ldisc.
+ * Shut down the line discipline and work queue for this tty device and
+ * its paired pty (if exists). Clearing the TTY_LDISC flag ensures
+ * no further references can be obtained, while waiting for existing
+ * references to be released ensures no more data is fed to the ldisc.
*
* You need to do a 'flush_scheduled_work()' (outside the ldisc_mutex)
* in order to make sure any currently executing ldisc work is also
* flushed.
*/
-static int tty_ldisc_halt(struct tty_struct *tty)
+static int tty_ldisc_halt(struct tty_struct *tty, struct tty_struct *o_tty,
+ long timeout)
{
+ int retval;
+
clear_bit(TTY_LDISC, &tty->flags);
- return cancel_work_sync(&tty->port->buf.work);
-}
+ if (o_tty)
+ clear_bit(TTY_LDISC, &o_tty->flags);
-/**
- * tty_ldisc_flush_works - flush all works of a tty
- * @tty: tty device to flush works for
- *
- * Sync flush all works belonging to @tty.
- */
-static void tty_ldisc_flush_works(struct tty_struct *tty)
-{
- flush_work(&tty->hangup_work);
- flush_work(&tty->SAK_work);
- flush_work(&tty->port->buf.work);
+ retval = tty_ldisc_wait_idle(tty, timeout);
+ if (!retval && o_tty)
+ retval = tty_ldisc_wait_idle(o_tty, timeout);
+ if (retval)
+ return retval;
+
+ set_bit(TTY_LDISC_HALTED, &tty->flags);
+ if (o_tty)
+ set_bit(TTY_LDISC_HALTED, &o_tty->flags);
+
+ return 0;
}
/**
- * tty_ldisc_wait_idle - wait for the ldisc to become idle
- * @tty: tty to wait for
- * @timeout: for how long to wait at most
+ * tty_ldisc_hangup_halt - halt the line discipline for hangup
+ * @tty: tty being hung up
*
- * Wait for the line discipline to become idle. The discipline must
- * have been halted for this to guarantee it remains idle.
+ * Shut down the line discipline and work queue for the tty device
+ * being hungup. Clear the TTY_LDISC flag to ensure no further
+ * references can be obtained and wait for remaining references to be
+ * released to ensure no more data is fed to this ldisc.
+ * Caller must hold legacy and ->ldisc_mutex.
+ *
+ * NB: tty_set_ldisc() is prevented from changing the ldisc concurrently
+ * with this function by checking the TTY_HUPPING flag.
*/
-static int tty_ldisc_wait_idle(struct tty_struct *tty, long timeout)
+static bool tty_ldisc_hangup_halt(struct tty_struct *tty)
{
- long ret;
- ret = wait_event_timeout(tty->ldisc->wq_idle,
- atomic_read(&tty->ldisc->users) == 1, timeout);
- return ret > 0 ? 0 : -EBUSY;
+ char cur_n[TASK_COMM_LEN], tty_n[64];
+ long timeout = 3 * HZ;
+
+ clear_bit(TTY_LDISC, &tty->flags);
+
+ if (tty->ldisc) { /* Not yet closed */
+ tty_unlock(tty);
+
+ while (tty_ldisc_wait_idle(tty, timeout) == -EBUSY) {
+ timeout = MAX_SCHEDULE_TIMEOUT;
+ printk_ratelimited(KERN_WARNING
+ "%s: waiting (%s) for %s took too long, but we keep waiting...\n",
+ __func__, get_task_comm(cur_n, current),
+ tty_name(tty, tty_n));
+ }
+
+ set_bit(TTY_LDISC_HALTED, &tty->flags);
+
+ /* must reacquire both locks and preserve lock order */
+ mutex_unlock(&tty->ldisc_mutex);
+ tty_lock(tty);
+ mutex_lock(&tty->ldisc_mutex);
+ }
+ return !!tty->ldisc;
}
/**
{
int retval;
struct tty_ldisc *o_ldisc, *new_ldisc;
- int work, o_work = 0;
struct tty_struct *o_tty;
new_ldisc = tty_ldisc_get(ldisc);
return 0;
}
- tty_unlock(tty);
- /*
- * Problem: What do we do if this blocks ?
- * We could deadlock here
- */
-
- tty_wait_until_sent(tty, 0);
-
- tty_lock(tty);
mutex_lock(&tty->ldisc_mutex);
/*
* parallel to the change and re-referencing the tty.
*/
- work = tty_ldisc_halt(tty);
- if (o_tty)
- o_work = tty_ldisc_halt(o_tty);
+ retval = tty_ldisc_halt(tty, o_tty, 5 * HZ);
/*
- * Wait for ->hangup_work and ->buf.work handlers to terminate.
+ * Wait for hangup to complete, if pending.
* We must drop the mutex here in case a hangup is also in process.
*/
mutex_unlock(&tty->ldisc_mutex);
- tty_ldisc_flush_works(tty);
-
- retval = tty_ldisc_wait_idle(tty, 5 * HZ);
+ flush_work(&tty->hangup_work);
tty_lock(tty);
mutex_lock(&tty->ldisc_mutex);
tty_ldisc_close(tty, o_ldisc);
/* Now set up the new line discipline. */
- tty_ldisc_assign(tty, new_ldisc);
+ tty->ldisc = new_ldisc;
tty_set_termios_ldisc(tty, ldisc);
retval = tty_ldisc_open(tty, new_ldisc);
/* Restart the work queue in case no characters kick it off. Safe if
already running */
- if (work)
- schedule_work(&tty->port->buf.work);
- if (o_work)
+ schedule_work(&tty->port->buf.work);
+ if (o_tty)
schedule_work(&o_tty->port->buf.work);
+
mutex_unlock(&tty->ldisc_mutex);
tty_unlock(tty);
return retval;
tty_ldisc_close(tty, tty->ldisc);
tty_ldisc_put(tty->ldisc);
- tty->ldisc = NULL;
/*
* Switch the line discipline back
*/
- tty_ldisc_assign(tty, ld);
+ tty->ldisc = ld;
tty_set_termios_ldisc(tty, ldisc);
return 0;
int reset = tty->driver->flags & TTY_DRIVER_RESET_TERMIOS;
int err = 0;
+ tty_ldisc_debug(tty, "closing ldisc: %p\n", tty->ldisc);
+
/*
* FIXME! What are the locking issues here? This may me overdoing
* things... This question is especially important now that we've
*/
mutex_lock(&tty->ldisc_mutex);
- /*
- * this is like tty_ldisc_halt, but we need to give up
- * the BTM before calling cancel_work_sync, which may
- * need to wait for another function taking the BTM
- */
- clear_bit(TTY_LDISC, &tty->flags);
- tty_unlock(tty);
- cancel_work_sync(&tty->port->buf.work);
- mutex_unlock(&tty->ldisc_mutex);
-retry:
- tty_lock(tty);
- mutex_lock(&tty->ldisc_mutex);
-
- /* At this point we have a closed ldisc and we want to
- reopen it. We could defer this to the next open but
- it means auditing a lot of other paths so this is
- a FIXME */
- if (tty->ldisc) { /* Not yet closed */
- if (atomic_read(&tty->ldisc->users) != 1) {
- char cur_n[TASK_COMM_LEN], tty_n[64];
- long timeout = 3 * HZ;
- tty_unlock(tty);
-
- while (tty_ldisc_wait_idle(tty, timeout) == -EBUSY) {
- timeout = MAX_SCHEDULE_TIMEOUT;
- printk_ratelimited(KERN_WARNING
- "%s: waiting (%s) for %s took too long, but we keep waiting...\n",
- __func__, get_task_comm(cur_n, current),
- tty_name(tty, tty_n));
- }
- mutex_unlock(&tty->ldisc_mutex);
- goto retry;
- }
+ if (tty_ldisc_hangup_halt(tty)) {
+ /* At this point we have a halted ldisc; we want to close it and
+ reopen a new ldisc. We could defer the reopen to the next
+ open but it means auditing a lot of other paths so this is
+ a FIXME */
if (reset == 0) {
if (!tty_ldisc_reinit(tty, tty->termios.c_line))
mutex_unlock(&tty->ldisc_mutex);
if (reset)
tty_reset_termios(tty);
+
+ tty_ldisc_debug(tty, "re-opened ldisc: %p\n", tty->ldisc);
}
/**
static void tty_ldisc_kill(struct tty_struct *tty)
{
- /* There cannot be users from userspace now. But there still might be
- * drivers holding a reference via tty_ldisc_ref. Do not steal them the
- * ldisc until they are done. */
- tty_ldisc_wait_idle(tty, MAX_SCHEDULE_TIMEOUT);
-
mutex_lock(&tty->ldisc_mutex);
/*
* Now kill off the ldisc
void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty)
{
/*
- * Prevent flush_to_ldisc() from rescheduling the work for later. Then
- * kill any delayed work. As this is the final close it does not
- * race with the set_ldisc code path.
+ * Shutdown this line discipline. As this is the final close,
+ * it does not race with the set_ldisc code path.
*/
- tty_ldisc_halt(tty);
- if (o_tty)
- tty_ldisc_halt(o_tty);
+ tty_ldisc_debug(tty, "closing ldisc: %p\n", tty->ldisc);
- tty_ldisc_flush_works(tty);
- if (o_tty)
- tty_ldisc_flush_works(o_tty);
+ tty_ldisc_halt(tty, o_tty, MAX_SCHEDULE_TIMEOUT);
tty_lock_pair(tty, o_tty);
/* This will need doing differently if we need to lock */
tty_unlock_pair(tty, o_tty);
/* And the memory resources remaining (buffers, termios) will be
disposed of when the kref hits zero */
+
+ tty_ldisc_debug(tty, "ldisc closed\n");
}
/**
struct tty_ldisc *ld = tty_ldisc_get(N_TTY);
if (IS_ERR(ld))
panic("n_tty: init_tty");
- tty_ldisc_assign(tty, ld);
+ tty->ldisc = ld;
}
/**
*/
void tty_ldisc_deinit(struct tty_struct *tty)
{
- put_ldisc(tty->ldisc);
- tty_ldisc_assign(tty, NULL);
+ tty_ldisc_put(tty->ldisc);
+ tty->ldisc = NULL;
}
void tty_ldisc_begin(void)
*/
void tty_port_destroy(struct tty_port *port)
{
+ cancel_work_sync(&port->buf.work);
tty_buffer_free_all(port);
}
EXPORT_SYMBOL(tty_port_destroy);
}
EXPORT_SYMBOL(tty_port_tty_set);
-static void tty_port_shutdown(struct tty_port *port)
+static void tty_port_shutdown(struct tty_port *port, struct tty_struct *tty)
{
mutex_lock(&port->mutex);
- if (port->ops->shutdown && !port->console &&
- test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags))
+ if (port->console)
+ goto out;
+
+ if (test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags)) {
+ /*
+ * Drop DTR/RTS if HUPCL is set. This causes any attached
+ * modem to hang up the line.
+ */
+ if (tty && C_HUPCL(tty))
+ tty_port_lower_dtr_rts(port);
+
+ if (port->ops->shutdown)
port->ops->shutdown(port);
+ }
+out:
mutex_unlock(&port->mutex);
}
void tty_port_hangup(struct tty_port *port)
{
+ struct tty_struct *tty;
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
port->count = 0;
port->flags &= ~ASYNC_NORMAL_ACTIVE;
- if (port->tty) {
- set_bit(TTY_IO_ERROR, &port->tty->flags);
- tty_kref_put(port->tty);
- }
+ tty = port->tty;
+ if (tty)
+ set_bit(TTY_IO_ERROR, &tty->flags);
port->tty = NULL;
spin_unlock_irqrestore(&port->lock, flags);
+ tty_port_shutdown(port, tty);
+ tty_kref_put(tty);
wake_up_interruptible(&port->open_wait);
wake_up_interruptible(&port->delta_msr_wait);
- tty_port_shutdown(port);
}
EXPORT_SYMBOL(tty_port_hangup);
+/**
+ * tty_port_tty_hangup - helper to hang up a tty
+ *
+ * @port: tty port
+ * @check_clocal: hang only ttys with CLOCAL unset?
+ */
+void tty_port_tty_hangup(struct tty_port *port, bool check_clocal)
+{
+ struct tty_struct *tty = tty_port_tty_get(port);
+
+ if (tty && (!check_clocal || !C_CLOCAL(tty))) {
+ tty_hangup(tty);
+ tty_kref_put(tty);
+ }
+}
+EXPORT_SYMBOL_GPL(tty_port_tty_hangup);
+
+/**
+ * tty_port_tty_wakeup - helper to wake up a tty
+ *
+ * @port: tty port
+ */
+void tty_port_tty_wakeup(struct tty_port *port)
+{
+ struct tty_struct *tty = tty_port_tty_get(port);
+
+ if (tty) {
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+ }
+}
+EXPORT_SYMBOL_GPL(tty_port_tty_wakeup);
+
/**
* tty_port_carrier_raised - carrier raised check
* @port: tty port
while (1) {
/* Indicate we are open */
- if (tty->termios.c_cflag & CBAUD)
+ if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags))
tty_port_raise_dtr_rts(port);
prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE);
}
EXPORT_SYMBOL(tty_port_block_til_ready);
+static void tty_port_drain_delay(struct tty_port *port, struct tty_struct *tty)
+{
+ unsigned int bps = tty_get_baud_rate(tty);
+ long timeout;
+
+ if (bps > 1200) {
+ timeout = (HZ * 10 * port->drain_delay) / bps;
+ timeout = max_t(long, timeout, HZ / 10);
+ } else {
+ timeout = 2 * HZ;
+ }
+ schedule_timeout_interruptible(timeout);
+}
+
int tty_port_close_start(struct tty_port *port,
struct tty_struct *tty, struct file *filp)
{
set_bit(ASYNCB_CLOSING, &port->flags);
tty->closing = 1;
spin_unlock_irqrestore(&port->lock, flags);
- /* Don't block on a stalled port, just pull the chain */
- if (tty->flow_stopped)
- tty_driver_flush_buffer(tty);
- if (test_bit(ASYNCB_INITIALIZED, &port->flags) &&
- port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent_from_close(tty, port->closing_wait);
- if (port->drain_delay) {
- unsigned int bps = tty_get_baud_rate(tty);
- long timeout;
-
- if (bps > 1200)
- timeout = max_t(long,
- (HZ * 10 * port->drain_delay) / bps, HZ / 10);
- else
- timeout = 2 * HZ;
- schedule_timeout_interruptible(timeout);
+
+ if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
+ /* Don't block on a stalled port, just pull the chain */
+ if (tty->flow_stopped)
+ tty_driver_flush_buffer(tty);
+ if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent_from_close(tty, port->closing_wait);
+ if (port->drain_delay)
+ tty_port_drain_delay(port, tty);
}
/* Flush the ldisc buffering */
tty_ldisc_flush(tty);
- /* Drop DTR/RTS if HUPCL is set. This causes any attached modem to
- hang up the line */
- if (tty->termios.c_cflag & HUPCL)
- tty_port_lower_dtr_rts(port);
-
/* Don't call port->drop for the last reference. Callers will want
to drop the last active reference in ->shutdown() or the tty
shutdown path */
{
if (tty_port_close_start(port, tty, filp) == 0)
return;
- tty_port_shutdown(port);
+ tty_port_shutdown(port, tty);
set_bit(TTY_IO_ERROR, &tty->flags);
tty_port_close_end(port, tty);
tty_port_tty_set(port, NULL);
q = p->inverse_translations[i];
if (!q) {
- q = p->inverse_translations[i] = (unsigned char *)
- kmalloc(MAX_GLYPH, GFP_KERNEL);
+ q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL);
if (!q) return;
}
memset(q, 0, MAX_GLYPH);
{
struct acm *acm = urb->context;
struct usb_cdc_notification *dr = urb->transfer_buffer;
- struct tty_struct *tty;
unsigned char *data;
int newctrl;
int retval;
break;
case USB_CDC_NOTIFY_SERIAL_STATE:
- tty = tty_port_tty_get(&acm->port);
newctrl = get_unaligned_le16(data);
- if (tty) {
- if (!acm->clocal &&
- (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
- dev_dbg(&acm->control->dev,
- "%s - calling hangup\n", __func__);
- tty_hangup(tty);
- }
- tty_kref_put(tty);
+ if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
+ dev_dbg(&acm->control->dev, "%s - calling hangup\n",
+ __func__);
+ tty_port_tty_hangup(&acm->port, false);
}
acm->ctrlin = newctrl;
static void acm_softint(struct work_struct *work)
{
struct acm *acm = container_of(work, struct acm, work);
- struct tty_struct *tty;
dev_vdbg(&acm->data->dev, "%s\n", __func__);
- tty = tty_port_tty_get(&acm->port);
- if (!tty)
- return;
- tty_wakeup(tty);
- tty_kref_put(tty);
+ tty_port_tty_wakeup(&acm->port);
}
/*
static int acm_reset_resume(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
- struct tty_struct *tty;
- if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
- tty = tty_port_tty_get(&acm->port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
- }
+ if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
+ tty_port_tty_hangup(&acm->port, false);
return acm_resume(intf);
}
/* Local Function Declarations */
-static void digi_wakeup_write(struct usb_serial_port *port);
static void digi_wakeup_write_lock(struct work_struct *work);
static int digi_write_oob_command(struct usb_serial_port *port,
unsigned char *buf, int count, int interruptible);
unsigned long flags;
spin_lock_irqsave(&priv->dp_port_lock, flags);
- digi_wakeup_write(port);
+ tty_port_tty_wakeup(&port->port);
spin_unlock_irqrestore(&priv->dp_port_lock, flags);
}
-static void digi_wakeup_write(struct usb_serial_port *port)
-{
- struct tty_struct *tty = tty_port_tty_get(&port->port);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
-}
-
-
/*
* Digi Write OOB Command
*
}
}
/* wake up processes sleeping on writes immediately */
- digi_wakeup_write(port);
+ tty_port_tty_wakeup(&port->port);
/* also queue up a wakeup at scheduler time, in case we */
/* lost the race in write_chan(). */
schedule_work(&priv->dp_wakeup_work);
/* port must be open to use tty struct */
if (rts) {
tty->hw_stopped = 0;
- digi_wakeup_write(port);
+ tty_port_tty_wakeup(&port->port);
}
} else {
priv->dp_modem_signals &= ~TIOCM_CTS;
struct device *dev;
struct edgeport_port *edge_port;
struct usb_serial_port *port;
- struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
int length = urb->actual_length;
int bytes_avail;
/* tell the tty driver that something
has changed */
- tty = tty_port_tty_get(
- &edge_port->port->port);
- if (tty) {
- tty_wakeup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_wakeup(&edge_port->port->port);
/* Since we have more credit, check
if more data can be sent */
send_more_port_data(edge_serial,
static void edge_bulk_out_data_callback(struct urb *urb)
{
struct edgeport_port *edge_port = urb->context;
- struct tty_struct *tty;
int status = urb->status;
if (status) {
__func__, status);
}
- tty = tty_port_tty_get(&edge_port->port->port);
-
- if (tty && edge_port->open) {
- /* let the tty driver wakeup if it has a special
- write_wakeup function */
- tty_wakeup(tty);
- }
- tty_kref_put(tty);
+ if (edge_port->open)
+ tty_port_tty_wakeup(&edge_port->port->port);
/* Release the Write URB */
edge_port->write_in_progress = false;
static void edge_bulk_out_cmd_callback(struct urb *urb)
{
struct edgeport_port *edge_port = urb->context;
- struct tty_struct *tty;
int status = urb->status;
atomic_dec(&CmdUrbs);
return;
}
- /* Get pointer to tty */
- tty = tty_port_tty_get(&edge_port->port->port);
-
/* tell the tty driver that something has changed */
- if (tty && edge_port->open)
- tty_wakeup(tty);
- tty_kref_put(tty);
+ if (edge_port->open)
+ tty_port_tty_wakeup(&edge_port->port->port);
/* we have completed the command */
edge_port->commandPending = false;
struct usb_serial *serial;
struct usb_serial_port *port;
struct keyspan_port_private *p_priv;
- struct tty_struct *tty;
int old_dcd_state, err;
int status = urb->status;
p_priv->dcd_state = ((msg->gpia_dcd) ? 1 : 0);
p_priv->ri_state = ((msg->ri) ? 1 : 0);
- if (old_dcd_state != p_priv->dcd_state) {
- tty = tty_port_tty_get(&port->port);
- if (tty && !C_CLOCAL(tty))
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ if (old_dcd_state != p_priv->dcd_state)
+ tty_port_tty_hangup(&port->port, true);
/* Resubmit urb so we continue receiving */
err = usb_submit_urb(urb, GFP_ATOMIC);
struct usb_serial *serial;
struct usb_serial_port *port;
struct keyspan_port_private *p_priv;
- struct tty_struct *tty;
int old_dcd_state;
int status = urb->status;
p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
p_priv->ri_state = ((msg->ri) ? 1 : 0);
- if (old_dcd_state != p_priv->dcd_state && old_dcd_state) {
- tty = tty_port_tty_get(&port->port);
- if (tty && !C_CLOCAL(tty))
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
+ tty_port_tty_hangup(&port->port, true);
/* Resubmit urb so we continue receiving */
err = usb_submit_urb(urb, GFP_ATOMIC);
p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
p_priv->ri_state = ((msg->ri) ? 1 : 0);
- if (old_dcd_state != p_priv->dcd_state && old_dcd_state) {
- struct tty_struct *tty = tty_port_tty_get(&port->port);
- if (tty && !C_CLOCAL(tty))
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
+ tty_port_tty_hangup(&port->port, true);
/* Resubmit urb so we continue receiving */
err = usb_submit_urb(urb, GFP_ATOMIC);
struct usb_serial *serial;
struct usb_serial_port *port;
struct keyspan_port_private *p_priv;
- struct tty_struct *tty;
int old_dcd_state, err;
int status = urb->status;
p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
p_priv->ri_state = ((msg->ri) ? 1 : 0);
- if (old_dcd_state != p_priv->dcd_state && old_dcd_state) {
- tty = tty_port_tty_get(&port->port);
- if (tty && !C_CLOCAL(tty))
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
+ tty_port_tty_hangup(&port->port, true);
/* Resubmit urb so we continue receiving */
err = usb_submit_urb(urb, GFP_ATOMIC);
p_priv->cts_state = ((msg->hskia_cts) ? 1 : 0);
p_priv->dcd_state = ((msg->gpia_dcd) ? 1 : 0);
- if (old_dcd_state != p_priv->dcd_state && old_dcd_state) {
- struct tty_struct *tty = tty_port_tty_get(&port->port);
- if (tty && !C_CLOCAL(tty))
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
+ tty_port_tty_hangup(&port->port, true);
/* Resubmit urb so we continue receiving */
err = usb_submit_urb(urb, GFP_ATOMIC);
struct keyspan_pda_private *priv =
container_of(work, struct keyspan_pda_private, wakeup_work);
struct usb_serial_port *port = priv->port;
- struct tty_struct *tty = tty_port_tty_get(&port->port);
- if (tty)
- tty_wakeup(tty);
- tty_kref_put(tty);
+
+ tty_port_tty_wakeup(&port->port);
}
static void keyspan_pda_request_unthrottle(struct work_struct *work)
static void mos7720_bulk_out_data_callback(struct urb *urb)
{
struct moschip_port *mos7720_port;
- struct tty_struct *tty;
int status = urb->status;
if (status) {
return ;
}
- tty = tty_port_tty_get(&mos7720_port->port->port);
-
- if (tty && mos7720_port->open)
- tty_wakeup(tty);
- tty_kref_put(tty);
+ if (mos7720_port->open)
+ tty_port_tty_wakeup(&mos7720_port->port->port);
}
/*
{
struct moschip_port *mos7840_port;
struct usb_serial_port *port;
- struct tty_struct *tty;
int status = urb->status;
int i;
if (mos7840_port_paranoia_check(port, __func__))
return;
- tty = tty_port_tty_get(&port->port);
- if (tty && mos7840_port->open)
- tty_wakeup(tty);
- tty_kref_put(tty);
+ if (mos7840_port->open)
+ tty_port_tty_wakeup(&port->port);
}
portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
portdata->ri_state = ((signals & 0x08) ? 1 : 0);
- if (old_dcd_state && !portdata->dcd_state) {
- struct tty_struct *tty =
- tty_port_tty_get(&port->port);
- if (tty && !C_CLOCAL(tty))
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ if (old_dcd_state && !portdata->dcd_state)
+ tty_port_tty_hangup(&port->port, true);
} else {
dev_dbg(dev, "%s: type %x req %x\n", __func__,
req_pkt->bRequestType, req_pkt->bRequest);
};
struct qt2_port_private {
- bool is_open;
u8 device_port;
spinlock_t urb_lock;
return status;
}
- port_priv->is_open = true;
port_priv->device_port = (u8) device_port;
if (tty)
serial = port->serial;
port_priv = usb_get_serial_port_data(port);
- port_priv->is_open = false;
-
spin_lock_irqsave(&port_priv->urb_lock, flags);
usb_kill_urb(port_priv->write_urb);
port_priv->urb_in_use = false;
__func__);
break;
}
-
- if (port_priv->is_open)
- tty_flip_buffer_push(&port->port);
+ tty_flip_buffer_push(&port->port);
newport = *(ch + 3);
tty_insert_flip_string(&port->port, ch, 1);
}
- if (port_priv->is_open)
- tty_flip_buffer_push(&port->port);
+ tty_flip_buffer_push(&port->port);
}
static void qt2_write_bulk_callback(struct urb *urb)
port_priv = usb_get_serial_port_data(port);
- if (!port_priv->is_open) {
- dev_err(&port->dev,
- "%s - port is not open\n", __func__);
- return;
- }
-
val = (break_state == -1) ? 1 : 0;
status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL,
unsigned char signals = *((unsigned char *)
urb->transfer_buffer +
sizeof(struct usb_ctrlrequest));
- struct tty_struct *tty;
dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
signals);
portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
portdata->ri_state = ((signals & 0x08) ? 1 : 0);
- tty = tty_port_tty_get(&port->port);
- if (tty && !C_CLOCAL(tty) &&
- old_dcd_state && !portdata->dcd_state)
- tty_hangup(tty);
- tty_kref_put(tty);
+ if (old_dcd_state && !portdata->dcd_state)
+ tty_port_tty_hangup(&port->port, true);
} else {
dev_dbg(&port->dev, "%s: type %x req %x\n",
__func__, req_pkt->bRequestType,
{
int count, result;
struct usb_serial_port *port = tport->tp_port;
- struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
unsigned long flags;
spin_lock_irqsave(&tport->tp_lock, flags);
}
/* more room in the buffer for new writes, wakeup */
- if (tty)
- tty_wakeup(tty);
- tty_kref_put(tty);
+ tty_port_tty_wakeup(&port->port);
+
wake_up_interruptible(&tport->tp_write_wait);
return;
unlock:
spin_unlock_irqrestore(&tport->tp_lock, flags);
- tty_kref_put(tty);
return;
}
{
struct usb_serial_port *port =
container_of(work, struct usb_serial_port, work);
- struct tty_struct *tty;
- tty = tty_port_tty_get(&port->port);
- if (!tty)
- return;
-
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
-
- tty_wakeup(tty);
- tty_kref_put(tty);
+ tty_port_tty_wakeup(&port->port);
}
static void kill_traffic(struct usb_serial_port *port)
bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
void *dma_rx_param;
void *dma_tx_param;
+ bool dma_rx_poll_enable;
+ unsigned int dma_rx_poll_rate;
+ unsigned int dma_rx_poll_timeout;
void (*init) (void);
void (*exit) (void);
};
--- /dev/null
+/*
+ * Internal header file for Samsung S3C2410 serial ports (UART0-2)
+ *
+ * Copyright (C) 2002 Shane Nay (shane@minirl.com)
+ *
+ * Additional defines, Copyright 2003 Simtec Electronics (linux@simtec.co.uk)
+ *
+ * Adapted from:
+ *
+ * Internal header file for MX1ADS serial ports (UART1 & 2)
+ *
+ * Copyright (C) 2002 Shane Nay (shane@minirl.com)
+ *
+ * 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
+*/
+
+#ifndef __ASM_ARM_REGS_SERIAL_H
+#define __ASM_ARM_REGS_SERIAL_H
+
+#define S3C2410_URXH (0x24)
+#define S3C2410_UTXH (0x20)
+#define S3C2410_ULCON (0x00)
+#define S3C2410_UCON (0x04)
+#define S3C2410_UFCON (0x08)
+#define S3C2410_UMCON (0x0C)
+#define S3C2410_UBRDIV (0x28)
+#define S3C2410_UTRSTAT (0x10)
+#define S3C2410_UERSTAT (0x14)
+#define S3C2410_UFSTAT (0x18)
+#define S3C2410_UMSTAT (0x1C)
+
+#define S3C2410_LCON_CFGMASK ((0xF<<3)|(0x3))
+
+#define S3C2410_LCON_CS5 (0x0)
+#define S3C2410_LCON_CS6 (0x1)
+#define S3C2410_LCON_CS7 (0x2)
+#define S3C2410_LCON_CS8 (0x3)
+#define S3C2410_LCON_CSMASK (0x3)
+
+#define S3C2410_LCON_PNONE (0x0)
+#define S3C2410_LCON_PEVEN (0x5 << 3)
+#define S3C2410_LCON_PODD (0x4 << 3)
+#define S3C2410_LCON_PMASK (0x7 << 3)
+
+#define S3C2410_LCON_STOPB (1<<2)
+#define S3C2410_LCON_IRM (1<<6)
+
+#define S3C2440_UCON_CLKMASK (3<<10)
+#define S3C2440_UCON_CLKSHIFT (10)
+#define S3C2440_UCON_PCLK (0<<10)
+#define S3C2440_UCON_UCLK (1<<10)
+#define S3C2440_UCON_PCLK2 (2<<10)
+#define S3C2440_UCON_FCLK (3<<10)
+#define S3C2443_UCON_EPLL (3<<10)
+
+#define S3C6400_UCON_CLKMASK (3<<10)
+#define S3C6400_UCON_CLKSHIFT (10)
+#define S3C6400_UCON_PCLK (0<<10)
+#define S3C6400_UCON_PCLK2 (2<<10)
+#define S3C6400_UCON_UCLK0 (1<<10)
+#define S3C6400_UCON_UCLK1 (3<<10)
+
+#define S3C2440_UCON2_FCLK_EN (1<<15)
+#define S3C2440_UCON0_DIVMASK (15 << 12)
+#define S3C2440_UCON1_DIVMASK (15 << 12)
+#define S3C2440_UCON2_DIVMASK (7 << 12)
+#define S3C2440_UCON_DIVSHIFT (12)
+
+#define S3C2412_UCON_CLKMASK (3<<10)
+#define S3C2412_UCON_CLKSHIFT (10)
+#define S3C2412_UCON_UCLK (1<<10)
+#define S3C2412_UCON_USYSCLK (3<<10)
+#define S3C2412_UCON_PCLK (0<<10)
+#define S3C2412_UCON_PCLK2 (2<<10)
+
+#define S3C2410_UCON_CLKMASK (1 << 10)
+#define S3C2410_UCON_CLKSHIFT (10)
+#define S3C2410_UCON_UCLK (1<<10)
+#define S3C2410_UCON_SBREAK (1<<4)
+
+#define S3C2410_UCON_TXILEVEL (1<<9)
+#define S3C2410_UCON_RXILEVEL (1<<8)
+#define S3C2410_UCON_TXIRQMODE (1<<2)
+#define S3C2410_UCON_RXIRQMODE (1<<0)
+#define S3C2410_UCON_RXFIFO_TOI (1<<7)
+#define S3C2443_UCON_RXERR_IRQEN (1<<6)
+#define S3C2443_UCON_LOOPBACK (1<<5)
+
+#define S3C2410_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
+ S3C2410_UCON_RXILEVEL | \
+ S3C2410_UCON_TXIRQMODE | \
+ S3C2410_UCON_RXIRQMODE | \
+ S3C2410_UCON_RXFIFO_TOI)
+
+#define S3C2410_UFCON_FIFOMODE (1<<0)
+#define S3C2410_UFCON_TXTRIG0 (0<<6)
+#define S3C2410_UFCON_RXTRIG8 (1<<4)
+#define S3C2410_UFCON_RXTRIG12 (2<<4)
+
+/* S3C2440 FIFO trigger levels */
+#define S3C2440_UFCON_RXTRIG1 (0<<4)
+#define S3C2440_UFCON_RXTRIG8 (1<<4)
+#define S3C2440_UFCON_RXTRIG16 (2<<4)
+#define S3C2440_UFCON_RXTRIG32 (3<<4)
+
+#define S3C2440_UFCON_TXTRIG0 (0<<6)
+#define S3C2440_UFCON_TXTRIG16 (1<<6)
+#define S3C2440_UFCON_TXTRIG32 (2<<6)
+#define S3C2440_UFCON_TXTRIG48 (3<<6)
+
+#define S3C2410_UFCON_RESETBOTH (3<<1)
+#define S3C2410_UFCON_RESETTX (1<<2)
+#define S3C2410_UFCON_RESETRX (1<<1)
+
+#define S3C2410_UFCON_DEFAULT (S3C2410_UFCON_FIFOMODE | \
+ S3C2410_UFCON_TXTRIG0 | \
+ S3C2410_UFCON_RXTRIG8 )
+
+#define S3C2410_UMCOM_AFC (1<<4)
+#define S3C2410_UMCOM_RTS_LOW (1<<0)
+
+#define S3C2412_UMCON_AFC_63 (0<<5) /* same as s3c2443 */
+#define S3C2412_UMCON_AFC_56 (1<<5)
+#define S3C2412_UMCON_AFC_48 (2<<5)
+#define S3C2412_UMCON_AFC_40 (3<<5)
+#define S3C2412_UMCON_AFC_32 (4<<5)
+#define S3C2412_UMCON_AFC_24 (5<<5)
+#define S3C2412_UMCON_AFC_16 (6<<5)
+#define S3C2412_UMCON_AFC_8 (7<<5)
+
+#define S3C2410_UFSTAT_TXFULL (1<<9)
+#define S3C2410_UFSTAT_RXFULL (1<<8)
+#define S3C2410_UFSTAT_TXMASK (15<<4)
+#define S3C2410_UFSTAT_TXSHIFT (4)
+#define S3C2410_UFSTAT_RXMASK (15<<0)
+#define S3C2410_UFSTAT_RXSHIFT (0)
+
+/* UFSTAT S3C2443 same as S3C2440 */
+#define S3C2440_UFSTAT_TXFULL (1<<14)
+#define S3C2440_UFSTAT_RXFULL (1<<6)
+#define S3C2440_UFSTAT_TXSHIFT (8)
+#define S3C2440_UFSTAT_RXSHIFT (0)
+#define S3C2440_UFSTAT_TXMASK (63<<8)
+#define S3C2440_UFSTAT_RXMASK (63)
+
+#define S3C2410_UTRSTAT_TXE (1<<2)
+#define S3C2410_UTRSTAT_TXFE (1<<1)
+#define S3C2410_UTRSTAT_RXDR (1<<0)
+
+#define S3C2410_UERSTAT_OVERRUN (1<<0)
+#define S3C2410_UERSTAT_FRAME (1<<2)
+#define S3C2410_UERSTAT_BREAK (1<<3)
+#define S3C2443_UERSTAT_PARITY (1<<1)
+
+#define S3C2410_UERSTAT_ANY (S3C2410_UERSTAT_OVERRUN | \
+ S3C2410_UERSTAT_FRAME | \
+ S3C2410_UERSTAT_BREAK)
+
+#define S3C2410_UMSTAT_CTS (1<<0)
+#define S3C2410_UMSTAT_DeltaCTS (1<<2)
+
+#define S3C2443_DIVSLOT (0x2C)
+
+/* S3C64XX interrupt registers. */
+#define S3C64XX_UINTP 0x30
+#define S3C64XX_UINTSP 0x34
+#define S3C64XX_UINTM 0x38
+
+#define S3C64XX_UINTM_RXD (0)
+#define S3C64XX_UINTM_TXD (2)
+#define S3C64XX_UINTM_RXD_MSK (1 << S3C64XX_UINTM_RXD)
+#define S3C64XX_UINTM_TXD_MSK (1 << S3C64XX_UINTM_TXD)
+
+/* Following are specific to S5PV210 */
+#define S5PV210_UCON_CLKMASK (1<<10)
+#define S5PV210_UCON_CLKSHIFT (10)
+#define S5PV210_UCON_PCLK (0<<10)
+#define S5PV210_UCON_UCLK (1<<10)
+
+#define S5PV210_UFCON_TXTRIG0 (0<<8)
+#define S5PV210_UFCON_TXTRIG4 (1<<8)
+#define S5PV210_UFCON_TXTRIG8 (2<<8)
+#define S5PV210_UFCON_TXTRIG16 (3<<8)
+#define S5PV210_UFCON_TXTRIG32 (4<<8)
+#define S5PV210_UFCON_TXTRIG64 (5<<8)
+#define S5PV210_UFCON_TXTRIG128 (6<<8)
+#define S5PV210_UFCON_TXTRIG256 (7<<8)
+
+#define S5PV210_UFCON_RXTRIG1 (0<<4)
+#define S5PV210_UFCON_RXTRIG4 (1<<4)
+#define S5PV210_UFCON_RXTRIG8 (2<<4)
+#define S5PV210_UFCON_RXTRIG16 (3<<4)
+#define S5PV210_UFCON_RXTRIG32 (4<<4)
+#define S5PV210_UFCON_RXTRIG64 (5<<4)
+#define S5PV210_UFCON_RXTRIG128 (6<<4)
+#define S5PV210_UFCON_RXTRIG256 (7<<4)
+
+#define S5PV210_UFSTAT_TXFULL (1<<24)
+#define S5PV210_UFSTAT_RXFULL (1<<8)
+#define S5PV210_UFSTAT_TXMASK (255<<16)
+#define S5PV210_UFSTAT_TXSHIFT (16)
+#define S5PV210_UFSTAT_RXMASK (255<<0)
+#define S5PV210_UFSTAT_RXSHIFT (0)
+
+#define S3C2410_UCON_CLKSEL0 (1 << 0)
+#define S3C2410_UCON_CLKSEL1 (1 << 1)
+#define S3C2410_UCON_CLKSEL2 (1 << 2)
+#define S3C2410_UCON_CLKSEL3 (1 << 3)
+
+/* Default values for s5pv210 UCON and UFCON uart registers */
+#define S5PV210_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
+ S3C2410_UCON_RXILEVEL | \
+ S3C2410_UCON_TXIRQMODE | \
+ S3C2410_UCON_RXIRQMODE | \
+ S3C2410_UCON_RXFIFO_TOI | \
+ S3C2443_UCON_RXERR_IRQEN)
+
+#define S5PV210_UFCON_DEFAULT (S3C2410_UFCON_FIFOMODE | \
+ S5PV210_UFCON_TXTRIG4 | \
+ S5PV210_UFCON_RXTRIG4)
+
+#ifndef __ASSEMBLY__
+
+/* configuration structure for per-machine configurations for the
+ * serial port
+ *
+ * the pointer is setup by the machine specific initialisation from the
+ * arch/arm/mach-s3c2410/ directory.
+*/
+
+struct s3c2410_uartcfg {
+ unsigned char hwport; /* hardware port number */
+ unsigned char unused;
+ unsigned short flags;
+ upf_t uart_flags; /* default uart flags */
+ unsigned int clk_sel;
+
+ unsigned int has_fracval;
+
+ unsigned long ucon; /* value of ucon for port */
+ unsigned long ulcon; /* value of ulcon for port */
+ unsigned long ufcon; /* value of ufcon for port */
+};
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_ARM_REGS_SERIAL_H */
+
int count;
struct winsize winsize; /* termios mutex */
unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
- unsigned char warned:1;
unsigned char ctrl_status; /* ctrl_lock */
unsigned int receive_room; /* Bytes free for queue */
+ int flow_change;
struct tty_struct *link;
struct fasync_struct *fasync;
#define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
#define TTY_HUPPED 18 /* Post driver->hangup() */
#define TTY_HUPPING 21 /* ->hangup() in progress */
+#define TTY_LDISC_HALTED 22 /* Line discipline is halted */
#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
+/* Values for tty->flow_change */
+#define TTY_THROTTLE_SAFE 1
+#define TTY_UNTHROTTLE_SAFE 2
+
+static inline void __tty_set_flow_change(struct tty_struct *tty, int val)
+{
+ tty->flow_change = val;
+}
+
+static inline void tty_set_flow_change(struct tty_struct *tty, int val)
+{
+ tty->flow_change = val;
+ smp_mb();
+}
+
#ifdef CONFIG_TTY
extern void console_init(void);
extern void tty_kref_put(struct tty_struct *tty);
extern void tty_driver_flush_buffer(struct tty_struct *tty);
extern void tty_throttle(struct tty_struct *tty);
extern void tty_unthrottle(struct tty_struct *tty);
+extern int tty_throttle_safe(struct tty_struct *tty);
+extern int tty_unthrottle_safe(struct tty_struct *tty);
extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
extern void tty_driver_remove_tty(struct tty_driver *driver,
struct tty_struct *tty);
extern void tty_buffer_free_all(struct tty_port *port);
extern void tty_buffer_flush(struct tty_struct *tty);
extern void tty_buffer_init(struct tty_port *port);
-extern speed_t tty_get_baud_rate(struct tty_struct *tty);
extern speed_t tty_termios_baud_rate(struct ktermios *termios);
extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
extern void tty_termios_encode_baud_rate(struct ktermios *termios,
speed_t ibaud, speed_t obaud);
extern void tty_encode_baud_rate(struct tty_struct *tty,
speed_t ibaud, speed_t obaud);
+
+/**
+ * tty_get_baud_rate - get tty bit rates
+ * @tty: tty to query
+ *
+ * Returns the baud rate as an integer for this terminal. The
+ * termios lock must be held by the caller and the terminal bit
+ * flags may be updated.
+ *
+ * Locking: none
+ */
+static inline speed_t tty_get_baud_rate(struct tty_struct *tty)
+{
+ return tty_termios_baud_rate(&tty->termios);
+}
+
extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt);
extern void tty_port_raise_dtr_rts(struct tty_port *port);
extern void tty_port_lower_dtr_rts(struct tty_port *port);
extern void tty_port_hangup(struct tty_port *port);
+extern void tty_port_tty_hangup(struct tty_port *port, bool check_clocal);
+extern void tty_port_tty_wakeup(struct tty_port *port);
extern int tty_port_block_til_ready(struct tty_port *port,
struct tty_struct *tty, struct file *filp);
extern int tty_port_close_start(struct tty_port *port,
extern void tty_ldisc_init(struct tty_struct *tty);
extern void tty_ldisc_deinit(struct tty_struct *tty);
extern void tty_ldisc_begin(void);
-/* This last one is just for the tty layer internals and shouldn't be used elsewhere */
-extern void tty_ldisc_enable(struct tty_struct *tty);
/* n_tty.c */
*
* int (*open)(struct tty_struct *);
*
- * This function is called when the line discipline is associated
- * with the tty. The line discipline can use this as an
- * opportunity to initialize any state needed by the ldisc routines.
- *
+ * This function is called when the line discipline is associated
+ * with the tty. The line discipline can use this as an
+ * opportunity to initialize any state needed by the ldisc routines.
+ *
* void (*close)(struct tty_struct *);
*
* This function is called when the line discipline is being
- * shutdown, either because the tty is being closed or because
- * the tty is being changed to use a new line discipline
- *
+ * shutdown, either because the tty is being closed or because
+ * the tty is being changed to use a new line discipline
+ *
* void (*flush_buffer)(struct tty_struct *tty);
*
- * This function instructs the line discipline to clear its
- * buffers of any input characters it may have queued to be
- * delivered to the user mode process.
- *
+ * This function instructs the line discipline to clear its
+ * buffers of any input characters it may have queued to be
+ * delivered to the user mode process.
+ *
* ssize_t (*chars_in_buffer)(struct tty_struct *tty);
*
- * This function returns the number of input characters the line
+ * This function returns the number of input characters the line
* discipline may have queued up to be delivered to the user mode
* process.
- *
+ *
* ssize_t (*read)(struct tty_struct * tty, struct file * file,
* unsigned char * buf, size_t nr);
*
- * This function is called when the user requests to read from
- * the tty. The line discipline will return whatever characters
- * it has buffered up for the user. If this function is not
- * defined, the user will receive an EIO error.
- *
+ * This function is called when the user requests to read from
+ * the tty. The line discipline will return whatever characters
+ * it has buffered up for the user. If this function is not
+ * defined, the user will receive an EIO error.
+ *
* ssize_t (*write)(struct tty_struct * tty, struct file * file,
- * const unsigned char * buf, size_t nr);
- *
- * This function is called when the user requests to write to the
- * tty. The line discipline will deliver the characters to the
- * low-level tty device for transmission, optionally performing
- * some processing on the characters first. If this function is
- * not defined, the user will receive an EIO error.
- *
+ * const unsigned char * buf, size_t nr);
+ *
+ * This function is called when the user requests to write to the
+ * tty. The line discipline will deliver the characters to the
+ * low-level tty device for transmission, optionally performing
+ * some processing on the characters first. If this function is
+ * not defined, the user will receive an EIO error.
+ *
* int (*ioctl)(struct tty_struct * tty, struct file * file,
- * unsigned int cmd, unsigned long arg);
+ * unsigned int cmd, unsigned long arg);
*
* This function is called when the user requests an ioctl which
- * is not handled by the tty layer or the low-level tty driver.
- * It is intended for ioctls which affect line discpline
- * operation. Note that the search order for ioctls is (1) tty
- * layer, (2) tty low-level driver, (3) line discpline. So a
- * low-level driver can "grab" an ioctl request before the line
- * discpline has a chance to see it.
- *
+ * is not handled by the tty layer or the low-level tty driver.
+ * It is intended for ioctls which affect line discpline
+ * operation. Note that the search order for ioctls is (1) tty
+ * layer, (2) tty low-level driver, (3) line discpline. So a
+ * low-level driver can "grab" an ioctl request before the line
+ * discpline has a chance to see it.
+ *
* long (*compat_ioctl)(struct tty_struct * tty, struct file * file,
- * unsigned int cmd, unsigned long arg);
+ * unsigned int cmd, unsigned long arg);
*
- * Process ioctl calls from 32-bit process on 64-bit system
+ * Process ioctl calls from 32-bit process on 64-bit system
*
* void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
*
- * This function notifies the line discpline that a change has
- * been made to the termios structure.
- *
+ * This function notifies the line discpline that a change has
+ * been made to the termios structure.
+ *
* int (*poll)(struct tty_struct * tty, struct file * file,
- * poll_table *wait);
+ * poll_table *wait);
*
- * This function is called when a user attempts to select/poll on a
- * tty device. It is solely the responsibility of the line
- * discipline to handle poll requests.
+ * This function is called when a user attempts to select/poll on a
+ * tty device. It is solely the responsibility of the line
+ * discipline to handle poll requests.
*
* void (*receive_buf)(struct tty_struct *, const unsigned char *cp,
- * char *fp, int count);
- *
- * This function is called by the low-level tty driver to send
- * characters received by the hardware to the line discpline for
- * processing. <cp> is a pointer to the buffer of input
- * character received by the device. <fp> is a pointer to a
- * pointer of flag bytes which indicate whether a character was
- * received with a parity error, etc.
- *
+ * char *fp, int count);
+ *
+ * This function is called by the low-level tty driver to send
+ * characters received by the hardware to the line discpline for
+ * processing. <cp> is a pointer to the buffer of input
+ * character received by the device. <fp> is a pointer to a
+ * pointer of flag bytes which indicate whether a character was
+ * received with a parity error, etc.
+ *
* void (*write_wakeup)(struct tty_struct *);
*
- * This function is called by the low-level tty driver to signal
- * that line discpline should try to send more characters to the
- * low-level driver for transmission. If the line discpline does
- * not have any more data to send, it can just return.
+ * This function is called by the low-level tty driver to signal
+ * that line discpline should try to send more characters to the
+ * low-level driver for transmission. If the line discpline does
+ * not have any more data to send, it can just return.
*
* int (*hangup)(struct tty_struct *)
*
char *name;
int num;
int flags;
-
+
/*
* The following routines are called from above.
*/
void (*close)(struct tty_struct *);
void (*flush_buffer)(struct tty_struct *tty);
ssize_t (*chars_in_buffer)(struct tty_struct *tty);
- ssize_t (*read)(struct tty_struct * tty, struct file * file,
- unsigned char __user * buf, size_t nr);
- ssize_t (*write)(struct tty_struct * tty, struct file * file,
- const unsigned char * buf, size_t nr);
- int (*ioctl)(struct tty_struct * tty, struct file * file,
+ ssize_t (*read)(struct tty_struct *tty, struct file *file,
+ unsigned char __user *buf, size_t nr);
+ ssize_t (*write)(struct tty_struct *tty, struct file *file,
+ const unsigned char *buf, size_t nr);
+ int (*ioctl)(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg);
- long (*compat_ioctl)(struct tty_struct * tty, struct file * file,
+ long (*compat_ioctl)(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg);
- void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
+ void (*set_termios)(struct tty_struct *tty, struct ktermios *old);
unsigned int (*poll)(struct tty_struct *, struct file *,
struct poll_table_struct *);
int (*hangup)(struct tty_struct *tty);
-
+
/*
* The following routines are called from below.
*/
void (*dcd_change)(struct tty_struct *, unsigned int);
struct module *owner;
-
+
int refcount;
};
spin_unlock_irqrestore(&port->lock, flags);
while (1) {
- if (tty->termios.c_cflag & CBAUD)
+ if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags))
tty_port_raise_dtr_rts(port);
set_current_state(TASK_INTERRUPTIBLE);
self->settings.dce = IRCOMM_DELTA_CD;
ircomm_tty_check_modem_status(self);
} else {
- struct tty_struct *tty = tty_port_tty_get(&self->port);
IRDA_DEBUG(0, "%s(), hanging up!\n", __func__ );
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
+ tty_port_tty_hangup(&self->port, false);
}
break;
default:
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff