mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Atsushi Nemoto](/assets/img/avatar_default.png)
Implement the serial polling hooks for the serial_txx9 uart for use with kgdboc. This patch once got SOB from Jason on Jul 2008 and (perhaps) merged into kgdb-next branch, but lost somewhere then. I resend it now with Jason's Acked-by. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Acked-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1339 lines
33 KiB
C
1339 lines
33 KiB
C
/*
|
|
* drivers/serial/serial_txx9.c
|
|
*
|
|
* Derived from many drivers using generic_serial interface,
|
|
* especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
|
|
* (was in Linux/VR tree) by Jim Pick.
|
|
*
|
|
* Copyright (C) 1999 Harald Koerfgen
|
|
* Copyright (C) 2000 Jim Pick <jim@jimpick.com>
|
|
* Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
|
|
* Copyright (C) 2000-2002 Toshiba Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
|
|
*/
|
|
|
|
#if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
|
|
#define SUPPORT_SYSRQ
|
|
#endif
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/init.h>
|
|
#include <linux/console.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/serial.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
static char *serial_version = "1.11";
|
|
static char *serial_name = "TX39/49 Serial driver";
|
|
|
|
#define PASS_LIMIT 256
|
|
|
|
#if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
|
|
/* "ttyS" is used for standard serial driver */
|
|
#define TXX9_TTY_NAME "ttyTX"
|
|
#define TXX9_TTY_MINOR_START 196
|
|
#define TXX9_TTY_MAJOR 204
|
|
#else
|
|
/* acts like standard serial driver */
|
|
#define TXX9_TTY_NAME "ttyS"
|
|
#define TXX9_TTY_MINOR_START 64
|
|
#define TXX9_TTY_MAJOR TTY_MAJOR
|
|
#endif
|
|
|
|
/* flag aliases */
|
|
#define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART
|
|
#define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER
|
|
|
|
#ifdef CONFIG_PCI
|
|
/* support for Toshiba TC86C001 SIO */
|
|
#define ENABLE_SERIAL_TXX9_PCI
|
|
#endif
|
|
|
|
/*
|
|
* Number of serial ports
|
|
*/
|
|
#define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS
|
|
|
|
struct uart_txx9_port {
|
|
struct uart_port port;
|
|
/* No additional info for now */
|
|
};
|
|
|
|
#define TXX9_REGION_SIZE 0x24
|
|
|
|
/* TXX9 Serial Registers */
|
|
#define TXX9_SILCR 0x00
|
|
#define TXX9_SIDICR 0x04
|
|
#define TXX9_SIDISR 0x08
|
|
#define TXX9_SICISR 0x0c
|
|
#define TXX9_SIFCR 0x10
|
|
#define TXX9_SIFLCR 0x14
|
|
#define TXX9_SIBGR 0x18
|
|
#define TXX9_SITFIFO 0x1c
|
|
#define TXX9_SIRFIFO 0x20
|
|
|
|
/* SILCR : Line Control */
|
|
#define TXX9_SILCR_SCS_MASK 0x00000060
|
|
#define TXX9_SILCR_SCS_IMCLK 0x00000000
|
|
#define TXX9_SILCR_SCS_IMCLK_BG 0x00000020
|
|
#define TXX9_SILCR_SCS_SCLK 0x00000040
|
|
#define TXX9_SILCR_SCS_SCLK_BG 0x00000060
|
|
#define TXX9_SILCR_UEPS 0x00000010
|
|
#define TXX9_SILCR_UPEN 0x00000008
|
|
#define TXX9_SILCR_USBL_MASK 0x00000004
|
|
#define TXX9_SILCR_USBL_1BIT 0x00000000
|
|
#define TXX9_SILCR_USBL_2BIT 0x00000004
|
|
#define TXX9_SILCR_UMODE_MASK 0x00000003
|
|
#define TXX9_SILCR_UMODE_8BIT 0x00000000
|
|
#define TXX9_SILCR_UMODE_7BIT 0x00000001
|
|
|
|
/* SIDICR : DMA/Int. Control */
|
|
#define TXX9_SIDICR_TDE 0x00008000
|
|
#define TXX9_SIDICR_RDE 0x00004000
|
|
#define TXX9_SIDICR_TIE 0x00002000
|
|
#define TXX9_SIDICR_RIE 0x00001000
|
|
#define TXX9_SIDICR_SPIE 0x00000800
|
|
#define TXX9_SIDICR_CTSAC 0x00000600
|
|
#define TXX9_SIDICR_STIE_MASK 0x0000003f
|
|
#define TXX9_SIDICR_STIE_OERS 0x00000020
|
|
#define TXX9_SIDICR_STIE_CTSS 0x00000010
|
|
#define TXX9_SIDICR_STIE_RBRKD 0x00000008
|
|
#define TXX9_SIDICR_STIE_TRDY 0x00000004
|
|
#define TXX9_SIDICR_STIE_TXALS 0x00000002
|
|
#define TXX9_SIDICR_STIE_UBRKD 0x00000001
|
|
|
|
/* SIDISR : DMA/Int. Status */
|
|
#define TXX9_SIDISR_UBRK 0x00008000
|
|
#define TXX9_SIDISR_UVALID 0x00004000
|
|
#define TXX9_SIDISR_UFER 0x00002000
|
|
#define TXX9_SIDISR_UPER 0x00001000
|
|
#define TXX9_SIDISR_UOER 0x00000800
|
|
#define TXX9_SIDISR_ERI 0x00000400
|
|
#define TXX9_SIDISR_TOUT 0x00000200
|
|
#define TXX9_SIDISR_TDIS 0x00000100
|
|
#define TXX9_SIDISR_RDIS 0x00000080
|
|
#define TXX9_SIDISR_STIS 0x00000040
|
|
#define TXX9_SIDISR_RFDN_MASK 0x0000001f
|
|
|
|
/* SICISR : Change Int. Status */
|
|
#define TXX9_SICISR_OERS 0x00000020
|
|
#define TXX9_SICISR_CTSS 0x00000010
|
|
#define TXX9_SICISR_RBRKD 0x00000008
|
|
#define TXX9_SICISR_TRDY 0x00000004
|
|
#define TXX9_SICISR_TXALS 0x00000002
|
|
#define TXX9_SICISR_UBRKD 0x00000001
|
|
|
|
/* SIFCR : FIFO Control */
|
|
#define TXX9_SIFCR_SWRST 0x00008000
|
|
#define TXX9_SIFCR_RDIL_MASK 0x00000180
|
|
#define TXX9_SIFCR_RDIL_1 0x00000000
|
|
#define TXX9_SIFCR_RDIL_4 0x00000080
|
|
#define TXX9_SIFCR_RDIL_8 0x00000100
|
|
#define TXX9_SIFCR_RDIL_12 0x00000180
|
|
#define TXX9_SIFCR_RDIL_MAX 0x00000180
|
|
#define TXX9_SIFCR_TDIL_MASK 0x00000018
|
|
#define TXX9_SIFCR_TDIL_MASK 0x00000018
|
|
#define TXX9_SIFCR_TDIL_1 0x00000000
|
|
#define TXX9_SIFCR_TDIL_4 0x00000001
|
|
#define TXX9_SIFCR_TDIL_8 0x00000010
|
|
#define TXX9_SIFCR_TDIL_MAX 0x00000010
|
|
#define TXX9_SIFCR_TFRST 0x00000004
|
|
#define TXX9_SIFCR_RFRST 0x00000002
|
|
#define TXX9_SIFCR_FRSTE 0x00000001
|
|
#define TXX9_SIO_TX_FIFO 8
|
|
#define TXX9_SIO_RX_FIFO 16
|
|
|
|
/* SIFLCR : Flow Control */
|
|
#define TXX9_SIFLCR_RCS 0x00001000
|
|
#define TXX9_SIFLCR_TES 0x00000800
|
|
#define TXX9_SIFLCR_RTSSC 0x00000200
|
|
#define TXX9_SIFLCR_RSDE 0x00000100
|
|
#define TXX9_SIFLCR_TSDE 0x00000080
|
|
#define TXX9_SIFLCR_RTSTL_MASK 0x0000001e
|
|
#define TXX9_SIFLCR_RTSTL_MAX 0x0000001e
|
|
#define TXX9_SIFLCR_TBRK 0x00000001
|
|
|
|
/* SIBGR : Baudrate Control */
|
|
#define TXX9_SIBGR_BCLK_MASK 0x00000300
|
|
#define TXX9_SIBGR_BCLK_T0 0x00000000
|
|
#define TXX9_SIBGR_BCLK_T2 0x00000100
|
|
#define TXX9_SIBGR_BCLK_T4 0x00000200
|
|
#define TXX9_SIBGR_BCLK_T6 0x00000300
|
|
#define TXX9_SIBGR_BRD_MASK 0x000000ff
|
|
|
|
static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
|
|
{
|
|
switch (up->port.iotype) {
|
|
default:
|
|
return __raw_readl(up->port.membase + offset);
|
|
case UPIO_PORT:
|
|
return inl(up->port.iobase + offset);
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
sio_out(struct uart_txx9_port *up, int offset, int value)
|
|
{
|
|
switch (up->port.iotype) {
|
|
default:
|
|
__raw_writel(value, up->port.membase + offset);
|
|
break;
|
|
case UPIO_PORT:
|
|
outl(value, up->port.iobase + offset);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
|
|
{
|
|
sio_out(up, offset, sio_in(up, offset) & ~value);
|
|
}
|
|
static inline void
|
|
sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
|
|
{
|
|
sio_out(up, offset, sio_in(up, offset) | value);
|
|
}
|
|
|
|
static inline void
|
|
sio_quot_set(struct uart_txx9_port *up, int quot)
|
|
{
|
|
quot >>= 1;
|
|
if (quot < 256)
|
|
sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
|
|
else if (quot < (256 << 2))
|
|
sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
|
|
else if (quot < (256 << 4))
|
|
sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
|
|
else if (quot < (256 << 6))
|
|
sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
|
|
else
|
|
sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
|
|
}
|
|
|
|
static void serial_txx9_stop_tx(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
|
|
}
|
|
|
|
static void serial_txx9_start_tx(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
|
|
}
|
|
|
|
static void serial_txx9_stop_rx(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
|
|
}
|
|
|
|
static void serial_txx9_enable_ms(struct uart_port *port)
|
|
{
|
|
/* TXX9-SIO can not control DTR... */
|
|
}
|
|
|
|
static void serial_txx9_initialize(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
unsigned int tmout = 10000;
|
|
|
|
sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
|
|
/* TX4925 BUG WORKAROUND. Accessing SIOC register
|
|
* immediately after soft reset causes bus error. */
|
|
mmiowb();
|
|
udelay(1);
|
|
while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
|
|
udelay(1);
|
|
/* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
|
|
sio_set(up, TXX9_SIFCR,
|
|
TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
|
|
/* initial settings */
|
|
sio_out(up, TXX9_SILCR,
|
|
TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
|
|
((up->port.flags & UPF_TXX9_USE_SCLK) ?
|
|
TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
|
|
sio_quot_set(up, uart_get_divisor(port, 9600));
|
|
sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
|
|
sio_out(up, TXX9_SIDICR, 0);
|
|
}
|
|
|
|
static inline void
|
|
receive_chars(struct uart_txx9_port *up, unsigned int *status)
|
|
{
|
|
struct tty_struct *tty = up->port.info->port.tty;
|
|
unsigned char ch;
|
|
unsigned int disr = *status;
|
|
int max_count = 256;
|
|
char flag;
|
|
unsigned int next_ignore_status_mask;
|
|
|
|
do {
|
|
ch = sio_in(up, TXX9_SIRFIFO);
|
|
flag = TTY_NORMAL;
|
|
up->port.icount.rx++;
|
|
|
|
/* mask out RFDN_MASK bit added by previous overrun */
|
|
next_ignore_status_mask =
|
|
up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
|
|
if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
|
|
TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
|
|
/*
|
|
* For statistics only
|
|
*/
|
|
if (disr & TXX9_SIDISR_UBRK) {
|
|
disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
|
|
up->port.icount.brk++;
|
|
/*
|
|
* We do the SysRQ and SAK checking
|
|
* here because otherwise the break
|
|
* may get masked by ignore_status_mask
|
|
* or read_status_mask.
|
|
*/
|
|
if (uart_handle_break(&up->port))
|
|
goto ignore_char;
|
|
} else if (disr & TXX9_SIDISR_UPER)
|
|
up->port.icount.parity++;
|
|
else if (disr & TXX9_SIDISR_UFER)
|
|
up->port.icount.frame++;
|
|
if (disr & TXX9_SIDISR_UOER) {
|
|
up->port.icount.overrun++;
|
|
/*
|
|
* The receiver read buffer still hold
|
|
* a char which caused overrun.
|
|
* Ignore next char by adding RFDN_MASK
|
|
* to ignore_status_mask temporarily.
|
|
*/
|
|
next_ignore_status_mask |=
|
|
TXX9_SIDISR_RFDN_MASK;
|
|
}
|
|
|
|
/*
|
|
* Mask off conditions which should be ingored.
|
|
*/
|
|
disr &= up->port.read_status_mask;
|
|
|
|
if (disr & TXX9_SIDISR_UBRK) {
|
|
flag = TTY_BREAK;
|
|
} else if (disr & TXX9_SIDISR_UPER)
|
|
flag = TTY_PARITY;
|
|
else if (disr & TXX9_SIDISR_UFER)
|
|
flag = TTY_FRAME;
|
|
}
|
|
if (uart_handle_sysrq_char(&up->port, ch))
|
|
goto ignore_char;
|
|
|
|
uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
|
|
|
|
ignore_char:
|
|
up->port.ignore_status_mask = next_ignore_status_mask;
|
|
disr = sio_in(up, TXX9_SIDISR);
|
|
} while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
|
|
spin_unlock(&up->port.lock);
|
|
tty_flip_buffer_push(tty);
|
|
spin_lock(&up->port.lock);
|
|
*status = disr;
|
|
}
|
|
|
|
static inline void transmit_chars(struct uart_txx9_port *up)
|
|
{
|
|
struct circ_buf *xmit = &up->port.info->xmit;
|
|
int count;
|
|
|
|
if (up->port.x_char) {
|
|
sio_out(up, TXX9_SITFIFO, up->port.x_char);
|
|
up->port.icount.tx++;
|
|
up->port.x_char = 0;
|
|
return;
|
|
}
|
|
if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
|
|
serial_txx9_stop_tx(&up->port);
|
|
return;
|
|
}
|
|
|
|
count = TXX9_SIO_TX_FIFO;
|
|
do {
|
|
sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
|
|
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
|
|
up->port.icount.tx++;
|
|
if (uart_circ_empty(xmit))
|
|
break;
|
|
} while (--count > 0);
|
|
|
|
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
|
|
uart_write_wakeup(&up->port);
|
|
|
|
if (uart_circ_empty(xmit))
|
|
serial_txx9_stop_tx(&up->port);
|
|
}
|
|
|
|
static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
|
|
{
|
|
int pass_counter = 0;
|
|
struct uart_txx9_port *up = dev_id;
|
|
unsigned int status;
|
|
|
|
while (1) {
|
|
spin_lock(&up->port.lock);
|
|
status = sio_in(up, TXX9_SIDISR);
|
|
if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
|
|
status &= ~TXX9_SIDISR_TDIS;
|
|
if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
|
|
TXX9_SIDISR_TOUT))) {
|
|
spin_unlock(&up->port.lock);
|
|
break;
|
|
}
|
|
|
|
if (status & TXX9_SIDISR_RDIS)
|
|
receive_chars(up, &status);
|
|
if (status & TXX9_SIDISR_TDIS)
|
|
transmit_chars(up);
|
|
/* Clear TX/RX Int. Status */
|
|
sio_mask(up, TXX9_SIDISR,
|
|
TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
|
|
TXX9_SIDISR_TOUT);
|
|
spin_unlock(&up->port.lock);
|
|
|
|
if (pass_counter++ > PASS_LIMIT)
|
|
break;
|
|
}
|
|
|
|
return pass_counter ? IRQ_HANDLED : IRQ_NONE;
|
|
}
|
|
|
|
static unsigned int serial_txx9_tx_empty(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
unsigned long flags;
|
|
unsigned int ret;
|
|
|
|
spin_lock_irqsave(&up->port.lock, flags);
|
|
ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
|
|
spin_unlock_irqrestore(&up->port.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
unsigned int ret;
|
|
|
|
/* no modem control lines */
|
|
ret = TIOCM_CAR | TIOCM_DSR;
|
|
ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
|
|
ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
|
|
if (mctrl & TIOCM_RTS)
|
|
sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
|
|
else
|
|
sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
|
|
}
|
|
|
|
static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&up->port.lock, flags);
|
|
if (break_state == -1)
|
|
sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
|
|
else
|
|
sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
|
|
spin_unlock_irqrestore(&up->port.lock, flags);
|
|
}
|
|
|
|
#if defined(CONFIG_SERIAL_TXX9_CONSOLE) || (CONFIG_CONSOLE_POLL)
|
|
/*
|
|
* Wait for transmitter & holding register to empty
|
|
*/
|
|
static void wait_for_xmitr(struct uart_txx9_port *up)
|
|
{
|
|
unsigned int tmout = 10000;
|
|
|
|
/* Wait up to 10ms for the character(s) to be sent. */
|
|
while (--tmout &&
|
|
!(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
|
|
udelay(1);
|
|
|
|
/* Wait up to 1s for flow control if necessary */
|
|
if (up->port.flags & UPF_CONS_FLOW) {
|
|
tmout = 1000000;
|
|
while (--tmout &&
|
|
(sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
|
|
udelay(1);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_CONSOLE_POLL
|
|
/*
|
|
* Console polling routines for writing and reading from the uart while
|
|
* in an interrupt or debug context.
|
|
*/
|
|
|
|
static int serial_txx9_get_poll_char(struct uart_port *port)
|
|
{
|
|
unsigned int ier;
|
|
unsigned char c;
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
|
|
/*
|
|
* First save the IER then disable the interrupts
|
|
*/
|
|
ier = sio_in(up, TXX9_SIDICR);
|
|
sio_out(up, TXX9_SIDICR, 0);
|
|
|
|
while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
|
|
;
|
|
|
|
c = sio_in(up, TXX9_SIRFIFO);
|
|
|
|
/*
|
|
* Finally, clear RX interrupt status
|
|
* and restore the IER
|
|
*/
|
|
sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
|
|
sio_out(up, TXX9_SIDICR, ier);
|
|
return c;
|
|
}
|
|
|
|
|
|
static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
|
|
{
|
|
unsigned int ier;
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
|
|
/*
|
|
* First save the IER then disable the interrupts
|
|
*/
|
|
ier = sio_in(up, TXX9_SIDICR);
|
|
sio_out(up, TXX9_SIDICR, 0);
|
|
|
|
wait_for_xmitr(up);
|
|
/*
|
|
* Send the character out.
|
|
* If a LF, also do CR...
|
|
*/
|
|
sio_out(up, TXX9_SITFIFO, c);
|
|
if (c == 10) {
|
|
wait_for_xmitr(up);
|
|
sio_out(up, TXX9_SITFIFO, 13);
|
|
}
|
|
|
|
/*
|
|
* Finally, wait for transmitter to become empty
|
|
* and restore the IER
|
|
*/
|
|
wait_for_xmitr(up);
|
|
sio_out(up, TXX9_SIDICR, ier);
|
|
}
|
|
|
|
#endif /* CONFIG_CONSOLE_POLL */
|
|
|
|
static int serial_txx9_startup(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
unsigned long flags;
|
|
int retval;
|
|
|
|
/*
|
|
* Clear the FIFO buffers and disable them.
|
|
* (they will be reenabled in set_termios())
|
|
*/
|
|
sio_set(up, TXX9_SIFCR,
|
|
TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
|
|
/* clear reset */
|
|
sio_mask(up, TXX9_SIFCR,
|
|
TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
|
|
sio_out(up, TXX9_SIDICR, 0);
|
|
|
|
/*
|
|
* Clear the interrupt registers.
|
|
*/
|
|
sio_out(up, TXX9_SIDISR, 0);
|
|
|
|
retval = request_irq(up->port.irq, serial_txx9_interrupt,
|
|
IRQF_SHARED, "serial_txx9", up);
|
|
if (retval)
|
|
return retval;
|
|
|
|
/*
|
|
* Now, initialize the UART
|
|
*/
|
|
spin_lock_irqsave(&up->port.lock, flags);
|
|
serial_txx9_set_mctrl(&up->port, up->port.mctrl);
|
|
spin_unlock_irqrestore(&up->port.lock, flags);
|
|
|
|
/* Enable RX/TX */
|
|
sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
|
|
|
|
/*
|
|
* Finally, enable interrupts.
|
|
*/
|
|
sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void serial_txx9_shutdown(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* Disable interrupts from this port
|
|
*/
|
|
sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */
|
|
|
|
spin_lock_irqsave(&up->port.lock, flags);
|
|
serial_txx9_set_mctrl(&up->port, up->port.mctrl);
|
|
spin_unlock_irqrestore(&up->port.lock, flags);
|
|
|
|
/*
|
|
* Disable break condition
|
|
*/
|
|
sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
|
|
|
|
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
|
|
if (up->port.cons && up->port.line == up->port.cons->index) {
|
|
free_irq(up->port.irq, up);
|
|
return;
|
|
}
|
|
#endif
|
|
/* reset FIFOs */
|
|
sio_set(up, TXX9_SIFCR,
|
|
TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
|
|
/* clear reset */
|
|
sio_mask(up, TXX9_SIFCR,
|
|
TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
|
|
|
|
/* Disable RX/TX */
|
|
sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
|
|
|
|
free_irq(up->port.irq, up);
|
|
}
|
|
|
|
static void
|
|
serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
|
|
struct ktermios *old)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
unsigned int cval, fcr = 0;
|
|
unsigned long flags;
|
|
unsigned int baud, quot;
|
|
|
|
/*
|
|
* We don't support modem control lines.
|
|
*/
|
|
termios->c_cflag &= ~(HUPCL | CMSPAR);
|
|
termios->c_cflag |= CLOCAL;
|
|
|
|
cval = sio_in(up, TXX9_SILCR);
|
|
/* byte size and parity */
|
|
cval &= ~TXX9_SILCR_UMODE_MASK;
|
|
switch (termios->c_cflag & CSIZE) {
|
|
case CS7:
|
|
cval |= TXX9_SILCR_UMODE_7BIT;
|
|
break;
|
|
default:
|
|
case CS5: /* not supported */
|
|
case CS6: /* not supported */
|
|
case CS8:
|
|
cval |= TXX9_SILCR_UMODE_8BIT;
|
|
break;
|
|
}
|
|
|
|
cval &= ~TXX9_SILCR_USBL_MASK;
|
|
if (termios->c_cflag & CSTOPB)
|
|
cval |= TXX9_SILCR_USBL_2BIT;
|
|
else
|
|
cval |= TXX9_SILCR_USBL_1BIT;
|
|
cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
|
|
if (termios->c_cflag & PARENB)
|
|
cval |= TXX9_SILCR_UPEN;
|
|
if (!(termios->c_cflag & PARODD))
|
|
cval |= TXX9_SILCR_UEPS;
|
|
|
|
/*
|
|
* Ask the core to calculate the divisor for us.
|
|
*/
|
|
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
|
|
quot = uart_get_divisor(port, baud);
|
|
|
|
/* Set up FIFOs */
|
|
/* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
|
|
fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
|
|
|
|
/*
|
|
* Ok, we're now changing the port state. Do it with
|
|
* interrupts disabled.
|
|
*/
|
|
spin_lock_irqsave(&up->port.lock, flags);
|
|
|
|
/*
|
|
* Update the per-port timeout.
|
|
*/
|
|
uart_update_timeout(port, termios->c_cflag, baud);
|
|
|
|
up->port.read_status_mask = TXX9_SIDISR_UOER |
|
|
TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
|
|
if (termios->c_iflag & INPCK)
|
|
up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
|
|
if (termios->c_iflag & (BRKINT | PARMRK))
|
|
up->port.read_status_mask |= TXX9_SIDISR_UBRK;
|
|
|
|
/*
|
|
* Characteres to ignore
|
|
*/
|
|
up->port.ignore_status_mask = 0;
|
|
if (termios->c_iflag & IGNPAR)
|
|
up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
|
|
if (termios->c_iflag & IGNBRK) {
|
|
up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
|
|
/*
|
|
* If we're ignoring parity and break indicators,
|
|
* ignore overruns too (for real raw support).
|
|
*/
|
|
if (termios->c_iflag & IGNPAR)
|
|
up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
|
|
}
|
|
|
|
/*
|
|
* ignore all characters if CREAD is not set
|
|
*/
|
|
if ((termios->c_cflag & CREAD) == 0)
|
|
up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
|
|
|
|
/* CTS flow control flag */
|
|
if ((termios->c_cflag & CRTSCTS) &&
|
|
(up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
|
|
sio_set(up, TXX9_SIFLCR,
|
|
TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
|
|
} else {
|
|
sio_mask(up, TXX9_SIFLCR,
|
|
TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
|
|
}
|
|
|
|
sio_out(up, TXX9_SILCR, cval);
|
|
sio_quot_set(up, quot);
|
|
sio_out(up, TXX9_SIFCR, fcr);
|
|
|
|
serial_txx9_set_mctrl(&up->port, up->port.mctrl);
|
|
spin_unlock_irqrestore(&up->port.lock, flags);
|
|
}
|
|
|
|
static void
|
|
serial_txx9_pm(struct uart_port *port, unsigned int state,
|
|
unsigned int oldstate)
|
|
{
|
|
/*
|
|
* If oldstate was -1 this is called from
|
|
* uart_configure_port(). In this case do not initialize the
|
|
* port now, because the port was already initialized (for
|
|
* non-console port) or should not be initialized here (for
|
|
* console port). If we initialized the port here we lose
|
|
* serial console settings.
|
|
*/
|
|
if (state == 0 && oldstate != -1)
|
|
serial_txx9_initialize(port);
|
|
}
|
|
|
|
static int serial_txx9_request_resource(struct uart_txx9_port *up)
|
|
{
|
|
unsigned int size = TXX9_REGION_SIZE;
|
|
int ret = 0;
|
|
|
|
switch (up->port.iotype) {
|
|
default:
|
|
if (!up->port.mapbase)
|
|
break;
|
|
|
|
if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
|
|
ret = -EBUSY;
|
|
break;
|
|
}
|
|
|
|
if (up->port.flags & UPF_IOREMAP) {
|
|
up->port.membase = ioremap(up->port.mapbase, size);
|
|
if (!up->port.membase) {
|
|
release_mem_region(up->port.mapbase, size);
|
|
ret = -ENOMEM;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case UPIO_PORT:
|
|
if (!request_region(up->port.iobase, size, "serial_txx9"))
|
|
ret = -EBUSY;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void serial_txx9_release_resource(struct uart_txx9_port *up)
|
|
{
|
|
unsigned int size = TXX9_REGION_SIZE;
|
|
|
|
switch (up->port.iotype) {
|
|
default:
|
|
if (!up->port.mapbase)
|
|
break;
|
|
|
|
if (up->port.flags & UPF_IOREMAP) {
|
|
iounmap(up->port.membase);
|
|
up->port.membase = NULL;
|
|
}
|
|
|
|
release_mem_region(up->port.mapbase, size);
|
|
break;
|
|
|
|
case UPIO_PORT:
|
|
release_region(up->port.iobase, size);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void serial_txx9_release_port(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
serial_txx9_release_resource(up);
|
|
}
|
|
|
|
static int serial_txx9_request_port(struct uart_port *port)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
return serial_txx9_request_resource(up);
|
|
}
|
|
|
|
static void serial_txx9_config_port(struct uart_port *port, int uflags)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
int ret;
|
|
|
|
/*
|
|
* Find the region that we can probe for. This in turn
|
|
* tells us whether we can probe for the type of port.
|
|
*/
|
|
ret = serial_txx9_request_resource(up);
|
|
if (ret < 0)
|
|
return;
|
|
port->type = PORT_TXX9;
|
|
up->port.fifosize = TXX9_SIO_TX_FIFO;
|
|
|
|
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
|
|
if (up->port.line == up->port.cons->index)
|
|
return;
|
|
#endif
|
|
serial_txx9_initialize(port);
|
|
}
|
|
|
|
static const char *
|
|
serial_txx9_type(struct uart_port *port)
|
|
{
|
|
return "txx9";
|
|
}
|
|
|
|
static struct uart_ops serial_txx9_pops = {
|
|
.tx_empty = serial_txx9_tx_empty,
|
|
.set_mctrl = serial_txx9_set_mctrl,
|
|
.get_mctrl = serial_txx9_get_mctrl,
|
|
.stop_tx = serial_txx9_stop_tx,
|
|
.start_tx = serial_txx9_start_tx,
|
|
.stop_rx = serial_txx9_stop_rx,
|
|
.enable_ms = serial_txx9_enable_ms,
|
|
.break_ctl = serial_txx9_break_ctl,
|
|
.startup = serial_txx9_startup,
|
|
.shutdown = serial_txx9_shutdown,
|
|
.set_termios = serial_txx9_set_termios,
|
|
.pm = serial_txx9_pm,
|
|
.type = serial_txx9_type,
|
|
.release_port = serial_txx9_release_port,
|
|
.request_port = serial_txx9_request_port,
|
|
.config_port = serial_txx9_config_port,
|
|
#ifdef CONFIG_CONSOLE_POLL
|
|
.poll_get_char = serial_txx9_get_poll_char,
|
|
.poll_put_char = serial_txx9_put_poll_char,
|
|
#endif
|
|
};
|
|
|
|
static struct uart_txx9_port serial_txx9_ports[UART_NR];
|
|
|
|
static void __init serial_txx9_register_ports(struct uart_driver *drv,
|
|
struct device *dev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < UART_NR; i++) {
|
|
struct uart_txx9_port *up = &serial_txx9_ports[i];
|
|
|
|
up->port.line = i;
|
|
up->port.ops = &serial_txx9_pops;
|
|
up->port.dev = dev;
|
|
if (up->port.iobase || up->port.mapbase)
|
|
uart_add_one_port(drv, &up->port);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
|
|
|
|
static void serial_txx9_console_putchar(struct uart_port *port, int ch)
|
|
{
|
|
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
|
|
|
|
wait_for_xmitr(up);
|
|
sio_out(up, TXX9_SITFIFO, ch);
|
|
}
|
|
|
|
/*
|
|
* Print a string to the serial port trying not to disturb
|
|
* any possible real use of the port...
|
|
*
|
|
* The console_lock must be held when we get here.
|
|
*/
|
|
static void
|
|
serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
|
|
{
|
|
struct uart_txx9_port *up = &serial_txx9_ports[co->index];
|
|
unsigned int ier, flcr;
|
|
|
|
/*
|
|
* First save the UER then disable the interrupts
|
|
*/
|
|
ier = sio_in(up, TXX9_SIDICR);
|
|
sio_out(up, TXX9_SIDICR, 0);
|
|
/*
|
|
* Disable flow-control if enabled (and unnecessary)
|
|
*/
|
|
flcr = sio_in(up, TXX9_SIFLCR);
|
|
if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
|
|
sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
|
|
|
|
uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
|
|
|
|
/*
|
|
* Finally, wait for transmitter to become empty
|
|
* and restore the IER
|
|
*/
|
|
wait_for_xmitr(up);
|
|
sio_out(up, TXX9_SIFLCR, flcr);
|
|
sio_out(up, TXX9_SIDICR, ier);
|
|
}
|
|
|
|
static int __init serial_txx9_console_setup(struct console *co, char *options)
|
|
{
|
|
struct uart_port *port;
|
|
struct uart_txx9_port *up;
|
|
int baud = 9600;
|
|
int bits = 8;
|
|
int parity = 'n';
|
|
int flow = 'n';
|
|
|
|
/*
|
|
* Check whether an invalid uart number has been specified, and
|
|
* if so, search for the first available port that does have
|
|
* console support.
|
|
*/
|
|
if (co->index >= UART_NR)
|
|
co->index = 0;
|
|
up = &serial_txx9_ports[co->index];
|
|
port = &up->port;
|
|
if (!port->ops)
|
|
return -ENODEV;
|
|
|
|
serial_txx9_initialize(&up->port);
|
|
|
|
if (options)
|
|
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
|
|
|
return uart_set_options(port, co, baud, parity, bits, flow);
|
|
}
|
|
|
|
static struct uart_driver serial_txx9_reg;
|
|
static struct console serial_txx9_console = {
|
|
.name = TXX9_TTY_NAME,
|
|
.write = serial_txx9_console_write,
|
|
.device = uart_console_device,
|
|
.setup = serial_txx9_console_setup,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
.data = &serial_txx9_reg,
|
|
};
|
|
|
|
static int __init serial_txx9_console_init(void)
|
|
{
|
|
register_console(&serial_txx9_console);
|
|
return 0;
|
|
}
|
|
console_initcall(serial_txx9_console_init);
|
|
|
|
#define SERIAL_TXX9_CONSOLE &serial_txx9_console
|
|
#else
|
|
#define SERIAL_TXX9_CONSOLE NULL
|
|
#endif
|
|
|
|
static struct uart_driver serial_txx9_reg = {
|
|
.owner = THIS_MODULE,
|
|
.driver_name = "serial_txx9",
|
|
.dev_name = TXX9_TTY_NAME,
|
|
.major = TXX9_TTY_MAJOR,
|
|
.minor = TXX9_TTY_MINOR_START,
|
|
.nr = UART_NR,
|
|
.cons = SERIAL_TXX9_CONSOLE,
|
|
};
|
|
|
|
int __init early_serial_txx9_setup(struct uart_port *port)
|
|
{
|
|
if (port->line >= ARRAY_SIZE(serial_txx9_ports))
|
|
return -ENODEV;
|
|
|
|
serial_txx9_ports[port->line].port = *port;
|
|
serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
|
|
serial_txx9_ports[port->line].port.flags |=
|
|
UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
|
|
return 0;
|
|
}
|
|
|
|
static DEFINE_MUTEX(serial_txx9_mutex);
|
|
|
|
/**
|
|
* serial_txx9_register_port - register a serial port
|
|
* @port: serial port template
|
|
*
|
|
* Configure the serial port specified by the request.
|
|
*
|
|
* The port is then probed and if necessary the IRQ is autodetected
|
|
* If this fails an error is returned.
|
|
*
|
|
* On success the port is ready to use and the line number is returned.
|
|
*/
|
|
static int __devinit serial_txx9_register_port(struct uart_port *port)
|
|
{
|
|
int i;
|
|
struct uart_txx9_port *uart;
|
|
int ret = -ENOSPC;
|
|
|
|
mutex_lock(&serial_txx9_mutex);
|
|
for (i = 0; i < UART_NR; i++) {
|
|
uart = &serial_txx9_ports[i];
|
|
if (uart_match_port(&uart->port, port)) {
|
|
uart_remove_one_port(&serial_txx9_reg, &uart->port);
|
|
break;
|
|
}
|
|
}
|
|
if (i == UART_NR) {
|
|
/* Find unused port */
|
|
for (i = 0; i < UART_NR; i++) {
|
|
uart = &serial_txx9_ports[i];
|
|
if (!(uart->port.iobase || uart->port.mapbase))
|
|
break;
|
|
}
|
|
}
|
|
if (i < UART_NR) {
|
|
uart->port.iobase = port->iobase;
|
|
uart->port.membase = port->membase;
|
|
uart->port.irq = port->irq;
|
|
uart->port.uartclk = port->uartclk;
|
|
uart->port.iotype = port->iotype;
|
|
uart->port.flags = port->flags
|
|
| UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
|
|
uart->port.mapbase = port->mapbase;
|
|
if (port->dev)
|
|
uart->port.dev = port->dev;
|
|
ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
|
|
if (ret == 0)
|
|
ret = uart->port.line;
|
|
}
|
|
mutex_unlock(&serial_txx9_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* serial_txx9_unregister_port - remove a txx9 serial port at runtime
|
|
* @line: serial line number
|
|
*
|
|
* Remove one serial port. This may not be called from interrupt
|
|
* context. We hand the port back to the our control.
|
|
*/
|
|
static void __devexit serial_txx9_unregister_port(int line)
|
|
{
|
|
struct uart_txx9_port *uart = &serial_txx9_ports[line];
|
|
|
|
mutex_lock(&serial_txx9_mutex);
|
|
uart_remove_one_port(&serial_txx9_reg, &uart->port);
|
|
uart->port.flags = 0;
|
|
uart->port.type = PORT_UNKNOWN;
|
|
uart->port.iobase = 0;
|
|
uart->port.mapbase = 0;
|
|
uart->port.membase = NULL;
|
|
uart->port.dev = NULL;
|
|
mutex_unlock(&serial_txx9_mutex);
|
|
}
|
|
|
|
/*
|
|
* Register a set of serial devices attached to a platform device.
|
|
*/
|
|
static int __devinit serial_txx9_probe(struct platform_device *dev)
|
|
{
|
|
struct uart_port *p = dev->dev.platform_data;
|
|
struct uart_port port;
|
|
int ret, i;
|
|
|
|
memset(&port, 0, sizeof(struct uart_port));
|
|
for (i = 0; p && p->uartclk != 0; p++, i++) {
|
|
port.iobase = p->iobase;
|
|
port.membase = p->membase;
|
|
port.irq = p->irq;
|
|
port.uartclk = p->uartclk;
|
|
port.iotype = p->iotype;
|
|
port.flags = p->flags;
|
|
port.mapbase = p->mapbase;
|
|
port.dev = &dev->dev;
|
|
ret = serial_txx9_register_port(&port);
|
|
if (ret < 0) {
|
|
dev_err(&dev->dev, "unable to register port at index %d "
|
|
"(IO%lx MEM%llx IRQ%d): %d\n", i,
|
|
p->iobase, (unsigned long long)p->mapbase,
|
|
p->irq, ret);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Remove serial ports registered against a platform device.
|
|
*/
|
|
static int __devexit serial_txx9_remove(struct platform_device *dev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < UART_NR; i++) {
|
|
struct uart_txx9_port *up = &serial_txx9_ports[i];
|
|
|
|
if (up->port.dev == &dev->dev)
|
|
serial_txx9_unregister_port(i);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < UART_NR; i++) {
|
|
struct uart_txx9_port *up = &serial_txx9_ports[i];
|
|
|
|
if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
|
|
uart_suspend_port(&serial_txx9_reg, &up->port);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int serial_txx9_resume(struct platform_device *dev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < UART_NR; i++) {
|
|
struct uart_txx9_port *up = &serial_txx9_ports[i];
|
|
|
|
if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
|
|
uart_resume_port(&serial_txx9_reg, &up->port);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static struct platform_driver serial_txx9_plat_driver = {
|
|
.probe = serial_txx9_probe,
|
|
.remove = __devexit_p(serial_txx9_remove),
|
|
#ifdef CONFIG_PM
|
|
.suspend = serial_txx9_suspend,
|
|
.resume = serial_txx9_resume,
|
|
#endif
|
|
.driver = {
|
|
.name = "serial_txx9",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
#ifdef ENABLE_SERIAL_TXX9_PCI
|
|
/*
|
|
* Probe one serial board. Unfortunately, there is no rhyme nor reason
|
|
* to the arrangement of serial ports on a PCI card.
|
|
*/
|
|
static int __devinit
|
|
pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
|
|
{
|
|
struct uart_port port;
|
|
int line;
|
|
int rc;
|
|
|
|
rc = pci_enable_device(dev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
memset(&port, 0, sizeof(port));
|
|
port.ops = &serial_txx9_pops;
|
|
port.flags |= UPF_TXX9_HAVE_CTS_LINE;
|
|
port.uartclk = 66670000;
|
|
port.irq = dev->irq;
|
|
port.iotype = UPIO_PORT;
|
|
port.iobase = pci_resource_start(dev, 1);
|
|
port.dev = &dev->dev;
|
|
line = serial_txx9_register_port(&port);
|
|
if (line < 0) {
|
|
printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
|
|
pci_disable_device(dev);
|
|
return line;
|
|
}
|
|
pci_set_drvdata(dev, &serial_txx9_ports[line]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
|
|
{
|
|
struct uart_txx9_port *up = pci_get_drvdata(dev);
|
|
|
|
pci_set_drvdata(dev, NULL);
|
|
|
|
if (up) {
|
|
serial_txx9_unregister_port(up->port.line);
|
|
pci_disable_device(dev);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
|
|
{
|
|
struct uart_txx9_port *up = pci_get_drvdata(dev);
|
|
|
|
if (up)
|
|
uart_suspend_port(&serial_txx9_reg, &up->port);
|
|
pci_save_state(dev);
|
|
pci_set_power_state(dev, pci_choose_state(dev, state));
|
|
return 0;
|
|
}
|
|
|
|
static int pciserial_txx9_resume_one(struct pci_dev *dev)
|
|
{
|
|
struct uart_txx9_port *up = pci_get_drvdata(dev);
|
|
|
|
pci_set_power_state(dev, PCI_D0);
|
|
pci_restore_state(dev);
|
|
if (up)
|
|
uart_resume_port(&serial_txx9_reg, &up->port);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct pci_device_id serial_txx9_pci_tbl[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
|
|
{ 0, }
|
|
};
|
|
|
|
static struct pci_driver serial_txx9_pci_driver = {
|
|
.name = "serial_txx9",
|
|
.probe = pciserial_txx9_init_one,
|
|
.remove = __devexit_p(pciserial_txx9_remove_one),
|
|
#ifdef CONFIG_PM
|
|
.suspend = pciserial_txx9_suspend_one,
|
|
.resume = pciserial_txx9_resume_one,
|
|
#endif
|
|
.id_table = serial_txx9_pci_tbl,
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
|
|
#endif /* ENABLE_SERIAL_TXX9_PCI */
|
|
|
|
static struct platform_device *serial_txx9_plat_devs;
|
|
|
|
static int __init serial_txx9_init(void)
|
|
{
|
|
int ret;
|
|
|
|
printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
|
|
|
|
ret = uart_register_driver(&serial_txx9_reg);
|
|
if (ret)
|
|
goto out;
|
|
|
|
serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
|
|
if (!serial_txx9_plat_devs) {
|
|
ret = -ENOMEM;
|
|
goto unreg_uart_drv;
|
|
}
|
|
|
|
ret = platform_device_add(serial_txx9_plat_devs);
|
|
if (ret)
|
|
goto put_dev;
|
|
|
|
serial_txx9_register_ports(&serial_txx9_reg,
|
|
&serial_txx9_plat_devs->dev);
|
|
|
|
ret = platform_driver_register(&serial_txx9_plat_driver);
|
|
if (ret)
|
|
goto del_dev;
|
|
|
|
#ifdef ENABLE_SERIAL_TXX9_PCI
|
|
ret = pci_register_driver(&serial_txx9_pci_driver);
|
|
#endif
|
|
if (ret == 0)
|
|
goto out;
|
|
|
|
del_dev:
|
|
platform_device_del(serial_txx9_plat_devs);
|
|
put_dev:
|
|
platform_device_put(serial_txx9_plat_devs);
|
|
unreg_uart_drv:
|
|
uart_unregister_driver(&serial_txx9_reg);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit serial_txx9_exit(void)
|
|
{
|
|
int i;
|
|
|
|
#ifdef ENABLE_SERIAL_TXX9_PCI
|
|
pci_unregister_driver(&serial_txx9_pci_driver);
|
|
#endif
|
|
platform_driver_unregister(&serial_txx9_plat_driver);
|
|
platform_device_unregister(serial_txx9_plat_devs);
|
|
for (i = 0; i < UART_NR; i++) {
|
|
struct uart_txx9_port *up = &serial_txx9_ports[i];
|
|
if (up->port.iobase || up->port.mapbase)
|
|
uart_remove_one_port(&serial_txx9_reg, &up->port);
|
|
}
|
|
|
|
uart_unregister_driver(&serial_txx9_reg);
|
|
}
|
|
|
|
module_init(serial_txx9_init);
|
|
module_exit(serial_txx9_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("TX39/49 serial driver");
|
|
|
|
MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);
|