serial: mrst_max3110: some code cleanup
The cleanup for mrst_max3110 includes: * remove unneeded head files * make the spi_transfer dma safe, so that driver is more portable * add more check for error return value * use mutex_trylock for read thread Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Feng Tang
Greg Kroah-Hartman
parent
b670bde0b2
commit
ee9b4500eb
|
|
@ -1,7 +1,7 @@
|
|||
/*
|
||||
* max3110.c - spi uart protocol driver for Maxim 3110 on Moorestown
|
||||
* mrst_max3110.c - spi uart protocol driver for Maxim 3110
|
||||
*
|
||||
* Copyright (C) Intel 2008 Feng Tang <feng.tang@intel.com>
|
||||
* Copyright (c) 2008-2010, Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
|
|
@ -32,18 +32,13 @@
|
|||
#include <linux/irq.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/console.h>
|
||||
#include <linux/sysrq.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/tty.h>
|
||||
#include <linux/tty_flip.h>
|
||||
#include <linux/serial_core.h>
|
||||
#include <linux/serial_reg.h>
|
||||
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/delay.h>
|
||||
#include <asm/atomic.h>
|
||||
#include <linux/spi/spi.h>
|
||||
#include <linux/spi/dw_spi.h>
|
||||
|
||||
#include "mrst_max3110.h"
|
||||
|
||||
|
|
@ -56,7 +51,7 @@
|
|||
struct uart_max3110 {
|
||||
struct uart_port port;
|
||||
struct spi_device *spi;
|
||||
char *name;
|
||||
char name[24];
|
||||
|
||||
wait_queue_head_t wq;
|
||||
struct task_struct *main_thread;
|
||||
|
|
@ -67,35 +62,30 @@ struct uart_max3110 {
|
|||
u16 cur_conf;
|
||||
u8 clock;
|
||||
u8 parity, word_7bits;
|
||||
u16 irq;
|
||||
|
||||
unsigned long uart_flags;
|
||||
|
||||
/* console related */
|
||||
struct circ_buf con_xmit;
|
||||
|
||||
/* irq related */
|
||||
u16 irq;
|
||||
};
|
||||
|
||||
/* global data structure, may need be removed */
|
||||
struct uart_max3110 *pmax;
|
||||
static inline void receive_char(struct uart_max3110 *max, u8 ch);
|
||||
static struct uart_max3110 *pmax;
|
||||
|
||||
static void receive_chars(struct uart_max3110 *max,
|
||||
unsigned char *str, int len);
|
||||
static int max3110_read_multi(struct uart_max3110 *max, int len, u8 *buf);
|
||||
static void max3110_console_receive(struct uart_max3110 *max);
|
||||
static int max3110_read_multi(struct uart_max3110 *max, u8 *buf);
|
||||
static void max3110_con_receive(struct uart_max3110 *max);
|
||||
|
||||
int max3110_write_then_read(struct uart_max3110 *max,
|
||||
const u8 *txbuf, u8 *rxbuf, unsigned len, int always_fast)
|
||||
static int max3110_write_then_read(struct uart_max3110 *max,
|
||||
const void *txbuf, void *rxbuf, unsigned len, int always_fast)
|
||||
{
|
||||
struct spi_device *spi = max->spi;
|
||||
struct spi_message message;
|
||||
struct spi_transfer x;
|
||||
int ret;
|
||||
|
||||
if (!txbuf || !rxbuf)
|
||||
return -EINVAL;
|
||||
|
||||
spi_message_init(&message);
|
||||
memset(&x, 0, sizeof x);
|
||||
x.len = len;
|
||||
|
|
@ -104,7 +94,7 @@ int max3110_write_then_read(struct uart_max3110 *max,
|
|||
spi_message_add_tail(&x, &message);
|
||||
|
||||
if (always_fast)
|
||||
x.speed_hz = 3125000;
|
||||
x.speed_hz = spi->max_speed_hz;
|
||||
else if (max->baud)
|
||||
x.speed_hz = max->baud;
|
||||
|
||||
|
|
@ -113,58 +103,80 @@ int max3110_write_then_read(struct uart_max3110 *max,
|
|||
return ret;
|
||||
}
|
||||
|
||||
/* Write a u16 to the device, and return one u16 read back */
|
||||
int max3110_out(struct uart_max3110 *max, const u16 out)
|
||||
/* Write a 16b word to the device */
|
||||
static int max3110_out(struct uart_max3110 *max, const u16 out)
|
||||
{
|
||||
u16 tmp;
|
||||
void *buf;
|
||||
u16 *obuf, *ibuf;
|
||||
u8 ch;
|
||||
int ret;
|
||||
|
||||
ret = max3110_write_then_read(max, (u8 *)&out, (u8 *)&tmp, 2, 1);
|
||||
if (ret)
|
||||
return ret;
|
||||
buf = kzalloc(8, GFP_KERNEL | GFP_DMA);
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
|
||||
obuf = buf;
|
||||
ibuf = buf + 4;
|
||||
*obuf = out;
|
||||
ret = max3110_write_then_read(max, obuf, ibuf, 2, 1);
|
||||
if (ret) {
|
||||
pr_warning(PR_FMT "%s(): get err msg %d when sending 0x%x\n",
|
||||
__func__, ret, out);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* If some valid data is read back */
|
||||
if (tmp & MAX3110_READ_DATA_AVAILABLE)
|
||||
receive_char(max, (tmp & 0xff));
|
||||
if (*ibuf & MAX3110_READ_DATA_AVAILABLE) {
|
||||
ch = *ibuf & 0xff;
|
||||
receive_chars(max, &ch, 1);
|
||||
}
|
||||
|
||||
exit:
|
||||
kfree(buf);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#define MAX_READ_LEN 20
|
||||
/*
|
||||
* This is usually used to read data from SPIC RX FIFO, which doesn't
|
||||
* need any delay like flushing character out. It returns how many
|
||||
* valide bytes are read back
|
||||
* need any delay like flushing character out.
|
||||
*
|
||||
* Return how many valide bytes are read back
|
||||
*/
|
||||
static int max3110_read_multi(struct uart_max3110 *max, int len, u8 *buf)
|
||||
static int max3110_read_multi(struct uart_max3110 *max, u8 *rxbuf)
|
||||
{
|
||||
u16 out[MAX_READ_LEN], in[MAX_READ_LEN];
|
||||
u8 *pbuf, valid_str[MAX_READ_LEN];
|
||||
int i, j, bytelen;
|
||||
void *buf;
|
||||
u16 *obuf, *ibuf;
|
||||
u8 *pbuf, valid_str[M3110_RX_FIFO_DEPTH];
|
||||
int i, j, blen;
|
||||
|
||||
if (len > MAX_READ_LEN) {
|
||||
pr_err(PR_FMT "read len %d is too large\n", len);
|
||||
blen = M3110_RX_FIFO_DEPTH * sizeof(u16);
|
||||
buf = kzalloc(blen * 2, GFP_KERNEL | GFP_DMA);
|
||||
if (!buf) {
|
||||
pr_warning(PR_FMT "%s(): fail to alloc dma buffer\n", __func__);
|
||||
return 0;
|
||||
}
|
||||
|
||||
bytelen = len * 2;
|
||||
memset(out, 0, bytelen);
|
||||
memset(in, 0, bytelen);
|
||||
/* tx/rx always have the same length */
|
||||
obuf = buf;
|
||||
ibuf = buf + blen;
|
||||
|
||||
if (max3110_write_then_read(max, (u8 *)out, (u8 *)in, bytelen, 1))
|
||||
if (max3110_write_then_read(max, obuf, ibuf, blen, 1)) {
|
||||
kfree(buf);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* If caller don't provide a buffer, then handle received char */
|
||||
pbuf = buf ? buf : valid_str;
|
||||
/* If caller doesn't provide a buffer, then handle received char */
|
||||
pbuf = rxbuf ? rxbuf : valid_str;
|
||||
|
||||
for (i = 0, j = 0; i < len; i++) {
|
||||
if (in[i] & MAX3110_READ_DATA_AVAILABLE)
|
||||
pbuf[j++] = (u8)(in[i] & 0xff);
|
||||
for (i = 0, j = 0; i < M3110_RX_FIFO_DEPTH; i++) {
|
||||
if (ibuf[i] & MAX3110_READ_DATA_AVAILABLE)
|
||||
pbuf[j++] = ibuf[i] & 0xff;
|
||||
}
|
||||
|
||||
if (j && (pbuf == valid_str))
|
||||
receive_chars(max, valid_str, j);
|
||||
|
||||
kfree(buf);
|
||||
return j;
|
||||
}
|
||||
|
||||
|
|
@ -178,10 +190,6 @@ static void serial_m3110_con_putchar(struct uart_port *port, int ch)
|
|||
xmit->buf[xmit->head] = (char)ch;
|
||||
xmit->head = (xmit->head + 1) & (PAGE_SIZE - 1);
|
||||
}
|
||||
|
||||
|
||||
if (!test_and_set_bit(CON_TX_NEEDED, &max->uart_flags))
|
||||
wake_up_process(max->main_thread);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -197,6 +205,9 @@ static void serial_m3110_con_write(struct console *co,
|
|||
return;
|
||||
|
||||
uart_console_write(&pmax->port, s, count, serial_m3110_con_putchar);
|
||||
|
||||
if (!test_and_set_bit(CON_TX_NEEDED, &pmax->uart_flags))
|
||||
wake_up_process(pmax->main_thread);
|
||||
}
|
||||
|
||||
static int __init
|
||||
|
|
@ -210,6 +221,9 @@ serial_m3110_con_setup(struct console *co, char *options)
|
|||
|
||||
pr_info(PR_FMT "setting up console\n");
|
||||
|
||||
if (co->index == -1)
|
||||
co->index = 0;
|
||||
|
||||
if (!max) {
|
||||
pr_err(PR_FMT "pmax is NULL, return");
|
||||
return -ENODEV;
|
||||
|
|
@ -240,8 +254,6 @@ static struct console serial_m3110_console = {
|
|||
.data = &serial_m3110_reg,
|
||||
};
|
||||
|
||||
#define MRST_CONSOLE (&serial_m3110_console)
|
||||
|
||||
static unsigned int serial_m3110_tx_empty(struct uart_port *port)
|
||||
{
|
||||
return 1;
|
||||
|
|
@ -259,32 +271,44 @@ static void serial_m3110_stop_rx(struct uart_port *port)
|
|||
}
|
||||
|
||||
#define WORDS_PER_XFER 128
|
||||
static inline void send_circ_buf(struct uart_max3110 *max,
|
||||
static void send_circ_buf(struct uart_max3110 *max,
|
||||
struct circ_buf *xmit)
|
||||
{
|
||||
int len, left = 0;
|
||||
u16 obuf[WORDS_PER_XFER], ibuf[WORDS_PER_XFER];
|
||||
void *buf;
|
||||
u16 *obuf, *ibuf;
|
||||
u8 valid_str[WORDS_PER_XFER];
|
||||
int i, j;
|
||||
int i, j, len, blen, dma_size, left, ret = 0;
|
||||
|
||||
|
||||
dma_size = WORDS_PER_XFER * sizeof(u16) * 2;
|
||||
buf = kzalloc(dma_size, GFP_KERNEL | GFP_DMA);
|
||||
if (!buf)
|
||||
return;
|
||||
obuf = buf;
|
||||
ibuf = buf + dma_size/2;
|
||||
|
||||
while (!uart_circ_empty(xmit)) {
|
||||
left = uart_circ_chars_pending(xmit);
|
||||
while (left) {
|
||||
len = (left >= WORDS_PER_XFER) ? WORDS_PER_XFER : left;
|
||||
len = min(left, WORDS_PER_XFER);
|
||||
blen = len * sizeof(u16);
|
||||
memset(ibuf, 0, blen);
|
||||
|
||||
memset(obuf, 0, len * 2);
|
||||
memset(ibuf, 0, len * 2);
|
||||
for (i = 0; i < len; i++) {
|
||||
obuf[i] = (u8)xmit->buf[xmit->tail] | WD_TAG;
|
||||
xmit->tail = (xmit->tail + 1) &
|
||||
(UART_XMIT_SIZE - 1);
|
||||
}
|
||||
max3110_write_then_read(max, (u8 *)obuf,
|
||||
(u8 *)ibuf, len * 2, 0);
|
||||
|
||||
/* Fail to send msg to console is not very critical */
|
||||
ret = max3110_write_then_read(max, obuf, ibuf, blen, 0);
|
||||
if (ret)
|
||||
pr_warning(PR_FMT "%s(): get err msg %d\n",
|
||||
__func__, ret);
|
||||
|
||||
for (i = 0, j = 0; i < len; i++) {
|
||||
if (ibuf[i] & MAX3110_READ_DATA_AVAILABLE)
|
||||
valid_str[j++] = (u8)(ibuf[i] & 0xff);
|
||||
valid_str[j++] = ibuf[i] & 0xff;
|
||||
}
|
||||
|
||||
if (j)
|
||||
|
|
@ -294,6 +318,8 @@ static inline void send_circ_buf(struct uart_max3110 *max,
|
|||
left -= len;
|
||||
}
|
||||
}
|
||||
|
||||
kfree(buf);
|
||||
}
|
||||
|
||||
static void transmit_char(struct uart_max3110 *max)
|
||||
|
|
@ -313,8 +339,10 @@ static void transmit_char(struct uart_max3110 *max)
|
|||
serial_m3110_stop_tx(port);
|
||||
}
|
||||
|
||||
/* This will be called by uart_write() and tty_write, can't
|
||||
* go to sleep */
|
||||
/*
|
||||
* This will be called by uart_write() and tty_write, can't
|
||||
* go to sleep
|
||||
*/
|
||||
static void serial_m3110_start_tx(struct uart_port *port)
|
||||
{
|
||||
struct uart_max3110 *max =
|
||||
|
|
@ -336,7 +364,7 @@ static void receive_chars(struct uart_max3110 *max, unsigned char *str, int len)
|
|||
|
||||
tty = port->state->port.tty;
|
||||
if (!tty)
|
||||
return; /* receive some char before the tty is opened */
|
||||
return;
|
||||
|
||||
while (len) {
|
||||
usable = tty_buffer_request_room(tty, len);
|
||||
|
|
@ -344,32 +372,37 @@ static void receive_chars(struct uart_max3110 *max, unsigned char *str, int len)
|
|||
tty_insert_flip_string(tty, str, usable);
|
||||
str += usable;
|
||||
port->icount.rx += usable;
|
||||
tty_flip_buffer_push(tty);
|
||||
}
|
||||
len -= usable;
|
||||
}
|
||||
tty_flip_buffer_push(tty);
|
||||
}
|
||||
|
||||
static inline void receive_char(struct uart_max3110 *max, u8 ch)
|
||||
{
|
||||
receive_chars(max, &ch, 1);
|
||||
}
|
||||
|
||||
static void max3110_console_receive(struct uart_max3110 *max)
|
||||
/*
|
||||
* This routine will be used in read_thread or RX IRQ handling,
|
||||
* it will first do one round buffer read(8 words), if there is some
|
||||
* valid RX data, will try to read 5 more rounds till all data
|
||||
* is read out.
|
||||
*
|
||||
* Use stack space as data buffer to save some system load, and chose
|
||||
* 504 Btyes as a threadhold to do a bulk push to upper tty layer when
|
||||
* receiving bulk data, a much bigger buffer may cause stack overflow
|
||||
*/
|
||||
static void max3110_con_receive(struct uart_max3110 *max)
|
||||
{
|
||||
int loop = 1, num, total = 0;
|
||||
u8 recv_buf[512], *pbuf;
|
||||
|
||||
pbuf = recv_buf;
|
||||
do {
|
||||
num = max3110_read_multi(max, 8, pbuf);
|
||||
num = max3110_read_multi(max, pbuf);
|
||||
|
||||
if (num) {
|
||||
loop = 10;
|
||||
loop = 5;
|
||||
pbuf += num;
|
||||
total += num;
|
||||
|
||||
if (total >= 500) {
|
||||
if (total >= 504) {
|
||||
receive_chars(max, recv_buf, total);
|
||||
pbuf = recv_buf;
|
||||
total = 0;
|
||||
|
|
@ -397,7 +430,7 @@ static int max3110_main_thread(void *_max)
|
|||
mutex_lock(&max->thread_mutex);
|
||||
|
||||
if (test_and_clear_bit(BIT_IRQ_PENDING, &max->uart_flags))
|
||||
max3110_console_receive(max);
|
||||
max3110_con_receive(max);
|
||||
|
||||
/* first handle console output */
|
||||
if (test_and_clear_bit(CON_TX_NEEDED, &max->uart_flags))
|
||||
|
|
@ -434,9 +467,14 @@ static int max3110_read_thread(void *_max)
|
|||
|
||||
pr_info(PR_FMT "start read thread\n");
|
||||
do {
|
||||
mutex_lock(&max->thread_mutex);
|
||||
max3110_console_receive(max);
|
||||
mutex_unlock(&max->thread_mutex);
|
||||
/*
|
||||
* If can't acquire the mutex, it means the main thread
|
||||
* is running which will also perform the rx job
|
||||
*/
|
||||
if (mutex_trylock(&max->thread_mutex)) {
|
||||
max3110_con_receive(max);
|
||||
mutex_unlock(&max->thread_mutex);
|
||||
}
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
schedule_timeout(HZ / 20);
|
||||
|
|
@ -453,15 +491,16 @@ static int serial_m3110_startup(struct uart_port *port)
|
|||
u16 config = 0;
|
||||
int ret = 0;
|
||||
|
||||
if (port->line != 0)
|
||||
if (port->line != 0) {
|
||||
pr_err(PR_FMT "uart port startup failed\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* firstly disable all IRQ and config it to 115200, 8n1 */
|
||||
/* Disable all IRQ and config it to 115200, 8n1 */
|
||||
config = WC_TAG | WC_FIFO_ENABLE
|
||||
| WC_1_STOPBITS
|
||||
| WC_8BIT_WORD
|
||||
| WC_BAUD_DR2;
|
||||
ret = max3110_out(max, config);
|
||||
|
||||
/* as we use thread to handle tx/rx, need set low latency */
|
||||
port->state->port.tty->low_latency = 1;
|
||||
|
|
@ -472,15 +511,31 @@ static int serial_m3110_startup(struct uart_port *port)
|
|||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* enable RX IRQ only */
|
||||
/* Enable RX IRQ only */
|
||||
config |= WC_RXA_IRQ_ENABLE;
|
||||
max3110_out(max, config);
|
||||
#else
|
||||
/* if IRQ is disabled, start a read thread for input data */
|
||||
/* If IRQ is disabled, start a read thread for input data */
|
||||
max->read_thread =
|
||||
kthread_run(max3110_read_thread, max, "max3110_read");
|
||||
if (IS_ERR(max->read_thread)) {
|
||||
ret = PTR_ERR(max->read_thread);
|
||||
max->read_thread = NULL;
|
||||
pr_err(PR_FMT "Can't create read thread!");
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
|
||||
ret = max3110_out(max, config);
|
||||
if (ret) {
|
||||
#ifdef CONFIG_MRST_MAX3110_IRQ
|
||||
free_irq(max->irq, max);
|
||||
#else
|
||||
kthread_stop(max->read_thread);
|
||||
max->read_thread = NULL;
|
||||
#endif
|
||||
return ret;
|
||||
}
|
||||
|
||||
max->cur_conf = config;
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -516,8 +571,7 @@ static int serial_m3110_request_port(struct uart_port *port)
|
|||
|
||||
static void serial_m3110_config_port(struct uart_port *port, int flags)
|
||||
{
|
||||
/* give it fake type */
|
||||
port->type = PORT_PXA;
|
||||
port->type = PORT_MAX3100;
|
||||
}
|
||||
|
||||
static int
|
||||
|
|
@ -552,6 +606,9 @@ serial_m3110_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
new_conf |= WC_7BIT_WORD;
|
||||
break;
|
||||
default:
|
||||
/* We only support CS7 & CS8 */
|
||||
termios->c_cflag &= ~CSIZE;
|
||||
termios->c_cflag |= CS8;
|
||||
case CS8:
|
||||
cval = UART_LCR_WLEN8;
|
||||
new_conf |= WC_8BIT_WORD;
|
||||
|
|
@ -560,7 +617,7 @@ serial_m3110_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
|
||||
baud = uart_get_baud_rate(port, termios, old, 0, 230400);
|
||||
|
||||
/* first calc the div for 1.8MHZ clock case */
|
||||
/* First calc the div for 1.8MHZ clock case */
|
||||
switch (baud) {
|
||||
case 300:
|
||||
clk_div = WC_BAUD_DR384;
|
||||
|
|
@ -596,7 +653,7 @@ serial_m3110_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
if (max->clock & MAX3110_HIGH_CLK)
|
||||
break;
|
||||
default:
|
||||
/* pick the previous baud rate */
|
||||
/* Pick the previous baud rate */
|
||||
baud = max->baud;
|
||||
clk_div = max->cur_conf & WC_BAUD_DIV_MASK;
|
||||
tty_termios_encode_baud_rate(termios, baud, baud);
|
||||
|
|
@ -604,15 +661,21 @@ serial_m3110_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
|
||||
if (max->clock & MAX3110_HIGH_CLK) {
|
||||
clk_div += 1;
|
||||
/* high clk version max3110 doesn't support B300 */
|
||||
if (baud == 300)
|
||||
/* High clk version max3110 doesn't support B300 */
|
||||
if (baud == 300) {
|
||||
baud = 600;
|
||||
clk_div = WC_BAUD_DR384;
|
||||
}
|
||||
if (baud == 230400)
|
||||
clk_div = WC_BAUD_DR1;
|
||||
tty_termios_encode_baud_rate(termios, baud, baud);
|
||||
}
|
||||
|
||||
new_conf = (new_conf & ~WC_BAUD_DIV_MASK) | clk_div;
|
||||
|
||||
if (unlikely(termios->c_cflag & CMSPAR))
|
||||
termios->c_cflag &= ~CMSPAR;
|
||||
|
||||
if (termios->c_cflag & CSTOPB)
|
||||
new_conf |= WC_2_STOPBITS;
|
||||
else
|
||||
|
|
@ -632,13 +695,14 @@ serial_m3110_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
|
||||
new_conf |= WC_TAG;
|
||||
if (new_conf != max->cur_conf) {
|
||||
max3110_out(max, new_conf);
|
||||
max->cur_conf = new_conf;
|
||||
max->baud = baud;
|
||||
if (!max3110_out(max, new_conf)) {
|
||||
max->cur_conf = new_conf;
|
||||
max->baud = baud;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* don't handle hw handshaking */
|
||||
/* Don't handle hw handshaking */
|
||||
static unsigned int serial_m3110_get_mctrl(struct uart_port *port)
|
||||
{
|
||||
return TIOCM_DSR | TIOCM_CAR | TIOCM_DSR;
|
||||
|
|
@ -672,7 +736,7 @@ struct uart_ops serial_m3110_ops = {
|
|||
.break_ctl = serial_m3110_break_ctl,
|
||||
.startup = serial_m3110_startup,
|
||||
.shutdown = serial_m3110_shutdown,
|
||||
.set_termios = serial_m3110_set_termios, /* must have */
|
||||
.set_termios = serial_m3110_set_termios,
|
||||
.pm = serial_m3110_pm,
|
||||
.type = serial_m3110_type,
|
||||
.release_port = serial_m3110_release_port,
|
||||
|
|
@ -688,52 +752,60 @@ static struct uart_driver serial_m3110_reg = {
|
|||
.major = TTY_MAJOR,
|
||||
.minor = 64,
|
||||
.nr = 1,
|
||||
.cons = MRST_CONSOLE,
|
||||
.cons = &serial_m3110_console,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int serial_m3110_suspend(struct spi_device *spi, pm_message_t state)
|
||||
{
|
||||
struct uart_max3110 *max = spi_get_drvdata(spi);
|
||||
|
||||
disable_irq(max->irq);
|
||||
uart_suspend_port(&serial_m3110_reg, &max->port);
|
||||
max3110_out(max, max->cur_conf | WC_SW_SHDI);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int serial_m3110_resume(struct spi_device *spi)
|
||||
{
|
||||
struct uart_max3110 *max = spi_get_drvdata(spi);
|
||||
|
||||
max3110_out(max, max->cur_conf);
|
||||
uart_resume_port(&serial_m3110_reg, &max->port);
|
||||
enable_irq(max->irq);
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#define serial_m3110_suspend NULL
|
||||
#define serial_m3110_resume NULL
|
||||
#endif
|
||||
|
||||
static struct dw_spi_chip spi0_uart = {
|
||||
.poll_mode = 1,
|
||||
.enable_dma = 0,
|
||||
.type = SPI_FRF_SPI,
|
||||
};
|
||||
|
||||
static int serial_m3110_probe(struct spi_device *spi)
|
||||
static int __devinit serial_m3110_probe(struct spi_device *spi)
|
||||
{
|
||||
struct uart_max3110 *max;
|
||||
int ret;
|
||||
unsigned char *buffer;
|
||||
void *buffer;
|
||||
u16 res;
|
||||
int ret = 0;
|
||||
|
||||
max = kzalloc(sizeof(*max), GFP_KERNEL);
|
||||
if (!max)
|
||||
return -ENOMEM;
|
||||
|
||||
/* set spi info */
|
||||
spi->mode = SPI_MODE_0;
|
||||
/* Set spi info */
|
||||
spi->bits_per_word = 16;
|
||||
max->clock = MAX3110_HIGH_CLK;
|
||||
spi->controller_data = &spi0_uart;
|
||||
|
||||
spi_setup(spi);
|
||||
|
||||
max->port.type = PORT_PXA; /* need apply for a max3110 type */
|
||||
max->port.fifosize = 2; /* only have 16b buffer */
|
||||
max->port.type = PORT_MAX3100;
|
||||
max->port.fifosize = 2; /* Only have 16b buffer */
|
||||
max->port.ops = &serial_m3110_ops;
|
||||
max->port.line = 0;
|
||||
max->port.dev = &spi->dev;
|
||||
max->port.uartclk = 115200;
|
||||
|
||||
max->spi = spi;
|
||||
max->name = spi->modalias; /* use spi name as the name */
|
||||
strcpy(max->name, spi->modalias);
|
||||
max->irq = (u16)spi->irq;
|
||||
|
||||
mutex_init(&max->thread_mutex);
|
||||
|
|
@ -755,13 +827,15 @@ static int serial_m3110_probe(struct spi_device *spi)
|
|||
ret = -ENODEV;
|
||||
goto err_get_page;
|
||||
}
|
||||
buffer = (unsigned char *)__get_free_page(GFP_KERNEL);
|
||||
|
||||
buffer = (void *)__get_free_page(GFP_KERNEL);
|
||||
if (!buffer) {
|
||||
ret = -ENOMEM;
|
||||
goto err_get_page;
|
||||
}
|
||||
max->con_xmit.buf = (unsigned char *)buffer;
|
||||
max->con_xmit.head = max->con_xmit.tail = 0;
|
||||
max->con_xmit.buf = buffer;
|
||||
max->con_xmit.head = 0;
|
||||
max->con_xmit.tail = 0;
|
||||
|
||||
max->main_thread = kthread_run(max3110_main_thread,
|
||||
max, "max3110_main");
|
||||
|
|
@ -770,8 +844,10 @@ static int serial_m3110_probe(struct spi_device *spi)
|
|||
goto err_kthread;
|
||||
}
|
||||
|
||||
spi_set_drvdata(spi, max);
|
||||
pmax = max;
|
||||
/* give membase a psudo value to pass serial_core's check */
|
||||
|
||||
/* Give membase a psudo value to pass serial_core's check */
|
||||
max->port.membase = (void *)0xff110000;
|
||||
uart_add_one_port(&serial_m3110_reg, &max->port);
|
||||
|
||||
|
|
@ -780,19 +856,17 @@ static int serial_m3110_probe(struct spi_device *spi)
|
|||
err_kthread:
|
||||
free_page((unsigned long)buffer);
|
||||
err_get_page:
|
||||
pmax = NULL;
|
||||
kfree(max);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int max3110_remove(struct spi_device *dev)
|
||||
static int __devexit serial_m3110_remove(struct spi_device *dev)
|
||||
{
|
||||
struct uart_max3110 *max = pmax;
|
||||
struct uart_max3110 *max = spi_get_drvdata(dev);
|
||||
|
||||
if (!pmax)
|
||||
if (!max)
|
||||
return 0;
|
||||
|
||||
pmax = NULL;
|
||||
uart_remove_one_port(&serial_m3110_reg, &max->port);
|
||||
|
||||
free_page((unsigned long)max->con_xmit.buf);
|
||||
|
|
@ -811,13 +885,12 @@ static struct spi_driver uart_max3110_driver = {
|
|||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = serial_m3110_probe,
|
||||
.remove = __devexit_p(max3110_remove),
|
||||
.remove = __devexit_p(serial_m3110_remove),
|
||||
.suspend = serial_m3110_suspend,
|
||||
.resume = serial_m3110_resume,
|
||||
};
|
||||
|
||||
|
||||
int __init serial_m3110_init(void)
|
||||
static int __init serial_m3110_init(void)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
|
|
@ -832,7 +905,7 @@ int __init serial_m3110_init(void)
|
|||
return ret;
|
||||
}
|
||||
|
||||
void __exit serial_m3110_exit(void)
|
||||
static void __exit serial_m3110_exit(void)
|
||||
{
|
||||
spi_unregister_driver(&uart_max3110_driver);
|
||||
uart_unregister_driver(&serial_m3110_reg);
|
||||
|
|
@ -841,5 +914,5 @@ void __exit serial_m3110_exit(void)
|
|||
module_init(serial_m3110_init);
|
||||
module_exit(serial_m3110_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("max3110-uart");
|
||||
|
|
|
|||
|
|
@ -56,4 +56,5 @@
|
|||
#define WC_BAUD_DR192 (0xE)
|
||||
#define WC_BAUD_DR384 (0xF)
|
||||
|
||||
#define M3110_RX_FIFO_DEPTH 8
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue