New and improved serial driver for cris v10.
Signed-off-by: Jesper Nilsson <[email protected]>
---
linux-2.6.23-mod/drivers/serial/crisv10.h | 151 +++++
linux-2.6.23/drivers/serial/crisv10.c | 797 +++++++++++++-----------------
2 files changed, 520 insertions(+), 428 deletions(-)
diff -urBb -X /h/jespern/.exclude_files clean_linux-2.6.23/drivers/serial/crisv10.c linux-2.6.23/drivers/serial/crisv10.c
--- clean_linux-2.6.23/drivers/serial/crisv10.c 2007-10-09 22:31:38.000000000 +0200
+++ linux-2.6.23/drivers/serial/crisv10.c 2007-10-23 10:49:53.000000000 +0200
@@ -2,7 +2,7 @@
*
* Serial port driver for the ETRAX 100LX chip
*
- * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Axis Communications AB
+ * Copyright (C) 1998-2007 Axis Communications AB
*
* Many, many authors. Based once upon a time on serial.c for 16x50.
*
@@ -445,6 +445,7 @@
#include <asm/io.h>
#include <asm/irq.h>
+#include <asm/dma.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <linux/delay.h>
@@ -454,8 +455,9 @@
/* non-arch dependent serial structures are in linux/serial.h */
#include <linux/serial.h>
/* while we keep our own stuff (struct e100_serial) in a local .h file */
-#include "serial.h"
+#include "crisv10.h"
#include <asm/fasttimer.h>
+#include <asm/arch/io_interface_mux.h>
#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
#ifndef CONFIG_ETRAX_FAST_TIMER
@@ -586,11 +588,10 @@
static void change_speed(struct e100_serial *info);
static void rs_throttle(struct tty_struct * tty);
static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
-static int rs_write(struct tty_struct * tty, int from_user,
+static int rs_write(struct tty_struct * tty,
const unsigned char *buf, int count);
#ifdef CONFIG_ETRAX_RS485
-static int e100_write_rs485(struct tty_struct * tty, int from_user,
- const unsigned char *buf, int count);
+static int e100_write_rs485(struct tty_struct * tty, const unsigned char *buf, int count);
#endif
static int get_lsr_info(struct e100_serial * info, unsigned int *value);
@@ -677,20 +678,39 @@
.rx_ctrl = DEF_RX,
.tx_ctrl = DEF_TX,
.iseteop = 2,
+ .dma_owner = dma_ser0,
+ .io_if = if_serial_0,
#ifdef CONFIG_ETRAX_SERIAL_PORT0
.enabled = 1,
#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
.dma_out_enabled = 1,
+ .dma_out_nbr = SER0_TX_DMA_NBR,
+ .dma_out_irq_nbr = SER0_DMA_TX_IRQ_NBR,
+ .dma_out_irq_flags = IRQF_DISABLED,
+ .dma_out_irq_description = "serial 0 dma tr",
#else
.dma_out_enabled = 0,
+ .dma_out_nbr = UINT_MAX,
+ .dma_out_irq_nbr = 0,
+ .dma_out_irq_flags = 0,
+ .dma_out_irq_description = NULL,
#endif
#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
.dma_in_enabled = 1,
+ .dma_in_nbr = SER0_RX_DMA_NBR,
+ .dma_in_irq_nbr = SER0_DMA_RX_IRQ_NBR,
+ .dma_in_irq_flags = IRQF_DISABLED,
+ .dma_in_irq_description = "serial 0 dma rec",
#else
- .dma_in_enabled = 0
+ .dma_in_enabled = 0,
+ .dma_in_nbr = UINT_MAX,
+ .dma_in_irq_nbr = 0,
+ .dma_in_irq_flags = 0,
+ .dma_in_irq_description = NULL,
#endif
#else
.enabled = 0,
+ .io_if_description = NULL,
.dma_out_enabled = 0,
.dma_in_enabled = 0
#endif
@@ -712,20 +732,42 @@
.rx_ctrl = DEF_RX,
.tx_ctrl = DEF_TX,
.iseteop = 3,
+ .dma_owner = dma_ser1,
+ .io_if = if_serial_1,
#ifdef CONFIG_ETRAX_SERIAL_PORT1
.enabled = 1,
+ .io_if_description = "ser1",
#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT
.dma_out_enabled = 1,
+ .dma_out_nbr = SER1_TX_DMA_NBR,
+ .dma_out_irq_nbr = SER1_DMA_TX_IRQ_NBR,
+ .dma_out_irq_flags = IRQF_DISABLED,
+ .dma_out_irq_description = "serial 1 dma tr",
#else
.dma_out_enabled = 0,
+ .dma_out_nbr = UINT_MAX,
+ .dma_out_irq_nbr = 0,
+ .dma_out_irq_flags = 0,
+ .dma_out_irq_description = NULL,
#endif
#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN
.dma_in_enabled = 1,
+ .dma_in_nbr = SER1_RX_DMA_NBR,
+ .dma_in_irq_nbr = SER1_DMA_RX_IRQ_NBR,
+ .dma_in_irq_flags = IRQF_DISABLED,
+ .dma_in_irq_description = "serial 1 dma rec",
#else
- .dma_in_enabled = 0
+ .dma_in_enabled = 0,
+ .dma_in_enabled = 0,
+ .dma_in_nbr = UINT_MAX,
+ .dma_in_irq_nbr = 0,
+ .dma_in_irq_flags = 0,
+ .dma_in_irq_description = NULL,
#endif
#else
.enabled = 0,
+ .io_if_description = NULL,
+ .dma_in_irq_nbr = 0,
.dma_out_enabled = 0,
.dma_in_enabled = 0
#endif
@@ -746,20 +788,40 @@
.rx_ctrl = DEF_RX,
.tx_ctrl = DEF_TX,
.iseteop = 0,
+ .dma_owner = dma_ser2,
+ .io_if = if_serial_2,
#ifdef CONFIG_ETRAX_SERIAL_PORT2
.enabled = 1,
+ .io_if_description = "ser2",
#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
.dma_out_enabled = 1,
+ .dma_out_nbr = SER2_TX_DMA_NBR,
+ .dma_out_irq_nbr = SER2_DMA_TX_IRQ_NBR,
+ .dma_out_irq_flags = IRQF_DISABLED,
+ .dma_out_irq_description = "serial 2 dma tr",
#else
.dma_out_enabled = 0,
+ .dma_out_nbr = UINT_MAX,
+ .dma_out_irq_nbr = 0,
+ .dma_out_irq_flags = 0,
+ .dma_out_irq_description = NULL,
#endif
#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
.dma_in_enabled = 1,
+ .dma_in_nbr = SER2_RX_DMA_NBR,
+ .dma_in_irq_nbr = SER2_DMA_RX_IRQ_NBR,
+ .dma_in_irq_flags = IRQF_DISABLED,
+ .dma_in_irq_description = "serial 2 dma rec",
#else
- .dma_in_enabled = 0
+ .dma_in_enabled = 0,
+ .dma_in_nbr = UINT_MAX,
+ .dma_in_irq_nbr = 0,
+ .dma_in_irq_flags = 0,
+ .dma_in_irq_description = NULL,
#endif
#else
.enabled = 0,
+ .io_if_description = NULL,
.dma_out_enabled = 0,
.dma_in_enabled = 0
#endif
@@ -780,20 +842,40 @@
.rx_ctrl = DEF_RX,
.tx_ctrl = DEF_TX,
.iseteop = 1,
+ .dma_owner = dma_ser3,
+ .io_if = if_serial_3,
#ifdef CONFIG_ETRAX_SERIAL_PORT3
.enabled = 1,
+ .io_if_description = "ser3",
#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT
.dma_out_enabled = 1,
+ .dma_out_nbr = SER3_TX_DMA_NBR,
+ .dma_out_irq_nbr = SER3_DMA_TX_IRQ_NBR,
+ .dma_out_irq_flags = IRQF_DISABLED,
+ .dma_out_irq_description = "serial 3 dma tr",
#else
.dma_out_enabled = 0,
+ .dma_out_nbr = UINT_MAX,
+ .dma_out_irq_nbr = 0,
+ .dma_out_irq_flags = 0,
+ .dma_out_irq_description = NULL,
#endif
#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN
.dma_in_enabled = 1,
+ .dma_in_nbr = SER3_RX_DMA_NBR,
+ .dma_in_irq_nbr = SER3_DMA_RX_IRQ_NBR,
+ .dma_in_irq_flags = IRQF_DISABLED,
+ .dma_in_irq_description = "serial 3 dma rec",
#else
- .dma_in_enabled = 0
+ .dma_in_enabled = 0,
+ .dma_in_nbr = UINT_MAX,
+ .dma_in_irq_nbr = 0,
+ .dma_in_irq_flags = 0,
+ .dma_in_irq_description = NULL
#endif
#else
.enabled = 0,
+ .io_if_description = NULL,
.dma_out_enabled = 0,
.dma_in_enabled = 0
#endif
@@ -1414,12 +1496,11 @@
{
unsigned long flags;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
*e100_modem_pins[info->line].dtr_shadow &= ~mask;
*e100_modem_pins[info->line].dtr_shadow |= (set ? 0 : mask);
*e100_modem_pins[info->line].dtr_port = *e100_modem_pins[info->line].dtr_shadow;
- restore_flags(flags);
+ local_irq_restore(flags);
}
#ifdef SERIAL_DEBUG_IO
@@ -1438,12 +1519,11 @@
{
#ifndef CONFIG_SVINTO_SIM
unsigned long flags;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
info->rx_ctrl &= ~E100_RTS_MASK;
info->rx_ctrl |= (set ? 0 : E100_RTS_MASK); /* RTS is active low */
info->port[REG_REC_CTRL] = info->rx_ctrl;
- restore_flags(flags);
+ local_irq_restore(flags);
#ifdef SERIAL_DEBUG_IO
printk("ser%i rts %i\n", info->line, set);
#endif
@@ -1461,12 +1541,11 @@
unsigned char mask = e100_modem_pins[info->line].ri_mask;
unsigned long flags;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
*e100_modem_pins[info->line].ri_shadow &= ~mask;
*e100_modem_pins[info->line].ri_shadow |= (set ? 0 : mask);
*e100_modem_pins[info->line].ri_port = *e100_modem_pins[info->line].ri_shadow;
- restore_flags(flags);
+ local_irq_restore(flags);
}
#endif
}
@@ -1479,12 +1558,11 @@
unsigned char mask = e100_modem_pins[info->line].cd_mask;
unsigned long flags;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
*e100_modem_pins[info->line].cd_shadow &= ~mask;
*e100_modem_pins[info->line].cd_shadow |= (set ? 0 : mask);
*e100_modem_pins[info->line].cd_port = *e100_modem_pins[info->line].cd_shadow;
- restore_flags(flags);
+ local_irq_restore(flags);
}
#endif
}
@@ -1558,8 +1636,7 @@
/* Disable output DMA channel for the serial port in question
* ( set to something other then serialX)
*/
- save_flags(flags);
- cli();
+ local_irq_save(flags);
DFLOW(DEBUG_LOG(info->line, "disable_txdma_channel %i\n", info->line));
if (info->line == 0) {
if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma6)) ==
@@ -1587,7 +1664,7 @@
}
}
*R_GEN_CONFIG = genconfig_shadow;
- restore_flags(flags);
+ local_irq_restore(flags);
}
@@ -1595,8 +1672,7 @@
{
unsigned long flags;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
DFLOW(DEBUG_LOG(info->line, "enable_txdma_channel %i\n", info->line));
/* Enable output DMA channel for the serial port in question */
if (info->line == 0) {
@@ -1613,7 +1689,7 @@
genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, serial3);
}
*R_GEN_CONFIG = genconfig_shadow;
- restore_flags(flags);
+ local_irq_restore(flags);
}
static void e100_disable_rxdma_channel(struct e100_serial *info)
@@ -1623,8 +1699,7 @@
/* Disable input DMA channel for the serial port in question
* ( set to something other then serialX)
*/
- save_flags(flags);
- cli();
+ local_irq_save(flags);
if (info->line == 0) {
if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma7)) ==
IO_STATE(R_GEN_CONFIG, dma7, serial0)) {
@@ -1651,7 +1726,7 @@
}
}
*R_GEN_CONFIG = genconfig_shadow;
- restore_flags(flags);
+ local_irq_restore(flags);
}
@@ -1659,8 +1734,7 @@
{
unsigned long flags;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
/* Enable input DMA channel for the serial port in question */
if (info->line == 0) {
genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma7);
@@ -1676,7 +1750,7 @@
genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, serial3);
}
*R_GEN_CONFIG = genconfig_shadow;
- restore_flags(flags);
+ local_irq_restore(flags);
}
#ifdef SERIAL_HANDLE_EARLY_ERRORS
@@ -1783,7 +1857,7 @@
}
static int
-e100_write_rs485(struct tty_struct *tty, int from_user,
+e100_write_rs485(struct tty_struct *tty,
const unsigned char *buf, int count)
{
struct e100_serial * info = (struct e100_serial *)tty->driver_data;
@@ -1796,7 +1870,7 @@
*/
info->rs485.enabled = 1;
/* rs_write now deals with RS485 if enabled */
- count = rs_write(tty, from_user, buf, count);
+ count = rs_write(tty, buf, count);
info->rs485.enabled = old_enabled;
return count;
}
@@ -1834,7 +1908,7 @@
unsigned long flags;
unsigned long xoff;
- save_flags(flags); cli();
+ local_irq_save(flags);
DFLOW(DEBUG_LOG(info->line, "XOFF rs_stop xmit %i\n",
CIRC_CNT(info->xmit.head,
info->xmit.tail,SERIAL_XMIT_SIZE)));
@@ -1846,7 +1920,7 @@
}
*((unsigned long *)&info->port[REG_XOFF]) = xoff;
- restore_flags(flags);
+ local_irq_restore(flags);
}
}
@@ -1858,7 +1932,7 @@
unsigned long flags;
unsigned long xoff;
- save_flags(flags); cli();
+ local_irq_save(flags);
DFLOW(DEBUG_LOG(info->line, "XOFF rs_start xmit %i\n",
CIRC_CNT(info->xmit.head,
info->xmit.tail,SERIAL_XMIT_SIZE)));
@@ -1873,7 +1947,7 @@
info->xmit.head != info->xmit.tail && info->xmit.buf)
e100_enable_serial_tx_ready_irq(info);
- restore_flags(flags);
+ local_irq_restore(flags);
}
}
@@ -2053,8 +2127,7 @@
static void flush_timeout_function(unsigned long data);
#define START_FLUSH_FAST_TIMER_TIME(info, string, usec) {\
unsigned long timer_flags; \
- save_flags(timer_flags); \
- cli(); \
+ local_irq_save(timer_flags); \
if (fast_timers[info->line].function == NULL) { \
serial_fast_timer_started++; \
TIMERD(DEBUG_LOG(info->line, "start_timer %i ", info->line)); \
@@ -2068,7 +2141,7 @@
else { \
TIMERD(DEBUG_LOG(info->line, "timer %i already running\n", info->line)); \
} \
- restore_flags(timer_flags); \
+ local_irq_restore(timer_flags); \
}
#define START_FLUSH_FAST_TIMER(info, string) START_FLUSH_FAST_TIMER_TIME(info, string, info->flush_time_usec)
@@ -2097,8 +2170,7 @@
{
unsigned long flags;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
if (!info->first_recv_buffer)
info->first_recv_buffer = buffer;
@@ -2111,7 +2183,7 @@
if (info->recv_cnt > info->max_recv_cnt)
info->max_recv_cnt = info->recv_cnt;
- restore_flags(flags);
+ local_irq_restore(flags);
}
static int
@@ -2131,11 +2203,7 @@
info->icount.rx++;
} else {
struct tty_struct *tty = info->tty;
- *tty->flip.char_buf_ptr = data;
- *tty->flip.flag_buf_ptr = flag;
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
+ tty_insert_flip_char(tty, data, flag);
info->icount.rx++;
}
@@ -2320,7 +2388,6 @@
*/
return;
#endif
- info->tty->flip.count = 0;
if (info->uses_dma_in) {
/* reset the input dma channel to be sure it works */
@@ -2482,70 +2549,21 @@
{
struct tty_struct *tty;
struct etrax_recv_buffer *buffer;
- unsigned int length;
unsigned long flags;
- int max_flip_size;
-
- if (!info->first_recv_buffer)
- return;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
+ tty = info->tty;
- if (!(tty = info->tty)) {
- restore_flags(flags);
+ if (!tty) {
+ local_irq_restore(flags);
return;
}
- length = tty->flip.count;
- /* Don't flip more than the ldisc has room for.
- * The return value from ldisc.receive_room(tty) - might not be up to
- * date, the previous flip of up to TTY_FLIPBUF_SIZE might be on the
- * processed and not accounted for yet.
- * Since we use DMA, 1 SERIAL_DESCR_BUF_SIZE could be on the way.
- * Lets buffer data here and let flow control take care of it.
- * Since we normally flip large chunks, the ldisc don't react
- * with throttle until too late if we flip to much.
- */
- max_flip_size = tty->ldisc.receive_room(tty);
- if (max_flip_size < 0)
- max_flip_size = 0;
- if (max_flip_size <= (TTY_FLIPBUF_SIZE + /* Maybe not accounted for */
- length + info->recv_cnt + /* We have this queued */
- 2*SERIAL_DESCR_BUF_SIZE + /* This could be on the way */
- TTY_THRESHOLD_THROTTLE)) { /* Some slack */
- /* check TTY_THROTTLED first so it indicates our state */
- if (!test_and_set_bit(TTY_THROTTLED, &tty->flags)) {
- DFLOW(DEBUG_LOG(info->line,"flush_to_flip throttles room %lu\n", max_flip_size));
- rs_throttle(tty);
- }
-#if 0
- else if (max_flip_size <= (TTY_FLIPBUF_SIZE + /* Maybe not accounted for */
- length + info->recv_cnt + /* We have this queued */
- SERIAL_DESCR_BUF_SIZE + /* This could be on the way */
- TTY_THRESHOLD_THROTTLE)) { /* Some slack */
- DFLOW(DEBUG_LOG(info->line,"flush_to_flip throttles again! %lu\n", max_flip_size));
- rs_throttle(tty);
- }
-#endif
- }
-
- if (max_flip_size > TTY_FLIPBUF_SIZE)
- max_flip_size = TTY_FLIPBUF_SIZE;
-
- while ((buffer = info->first_recv_buffer) && length < max_flip_size) {
+ while ((buffer = info->first_recv_buffer)) {
unsigned int count = buffer->length;
- if (length + count > max_flip_size)
- count = max_flip_size - length;
-
- memcpy(tty->flip.char_buf_ptr + length, buffer->buffer, count);
- memset(tty->flip.flag_buf_ptr + length, TTY_NORMAL, count);
- tty->flip.flag_buf_ptr[length] = buffer->error;
-
- length += count;
+ tty_insert_flip_string(tty, buffer->buffer, count);
info->recv_cnt -= count;
- DFLIP(DEBUG_LOG(info->line,"flip: %i\n", length));
if (count == buffer->length) {
info->first_recv_buffer = buffer->next;
@@ -2560,24 +2578,7 @@
if (!info->first_recv_buffer)
info->last_recv_buffer = NULL;
- tty->flip.count = length;
- DFLIP(if (tty->ldisc.chars_in_buffer(tty) > 3500) {
- DEBUG_LOG(info->line, "ldisc %lu\n",
- tty->ldisc.chars_in_buffer(tty));
- DEBUG_LOG(info->line, "flip.count %lu\n",
- tty->flip.count);
- }
- );
- restore_flags(flags);
-
- DFLIP(
- if (1) {
- DEBUG_LOG(info->line, "*** rxtot %i\n", info->icount.rx);
- DEBUG_LOG(info->line, "ldisc %lu\n", tty->ldisc.chars_in_buffer(tty));
- DEBUG_LOG(info->line, "room %lu\n", tty->ldisc.receive_room(tty));
- }
-
- );
+ local_irq_restore(flags);
/* this includes a check for low-latency */
tty_flip_buffer_push(tty);
@@ -2722,21 +2723,7 @@
printk("!NO TTY!\n");
return info;
}
- if (tty->flip.count >= TTY_FLIPBUF_SIZE - TTY_THRESHOLD_THROTTLE) {
- /* check TTY_THROTTLED first so it indicates our state */
- if (!test_and_set_bit(TTY_THROTTLED, &tty->flags)) {
- DFLOW(DEBUG_LOG(info->line, "rs_throttle flip.count: %i\n", tty->flip.count));
- rs_throttle(tty);
- }
- }
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
- DEBUG_LOG(info->line, "force FLIP! %i\n", tty->flip.count);
- tty->flip.work.func((void *) tty);
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
- DEBUG_LOG(info->line, "FLIP FULL! %i\n", tty->flip.count);
- return info; /* if TTY_DONT_FLIP is set */
- }
- }
+
/* Read data and status at the same time */
data_read = *((unsigned long *)&info->port[REG_DATA_STATUS32]);
more_data:
@@ -2789,27 +2776,25 @@
DEBUG_LOG(info->line, "EBRK %i\n", info->break_detected_cnt);
info->errorcode = ERRCODE_INSERT_BREAK;
} else {
+ unsigned char data = IO_EXTRACT(R_SERIAL0_READ, data_in, data_read);
+ char flag = TTY_NORMAL;
if (info->errorcode == ERRCODE_INSERT_BREAK) {
- info->icount.brk++;
- *tty->flip.char_buf_ptr = 0;
- *tty->flip.flag_buf_ptr = TTY_BREAK;
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
+ struct tty_struct *tty = info->tty;
+ tty_insert_flip_char(tty, 0, flag);
info->icount.rx++;
}
- *tty->flip.char_buf_ptr = IO_EXTRACT(R_SERIAL0_READ, data_in, data_read);
if (data_read & IO_MASK(R_SERIAL0_READ, par_err)) {
info->icount.parity++;
- *tty->flip.flag_buf_ptr = TTY_PARITY;
+ flag = TTY_PARITY;
} else if (data_read & IO_MASK(R_SERIAL0_READ, overrun)) {
info->icount.overrun++;
- *tty->flip.flag_buf_ptr = TTY_OVERRUN;
+ flag = TTY_OVERRUN;
} else if (data_read & IO_MASK(R_SERIAL0_READ, framing_err)) {
info->icount.frame++;
- *tty->flip.flag_buf_ptr = TTY_FRAME;
+ flag = TTY_FRAME;
}
+ tty_insert_flip_char(tty, data, flag);
info->errorcode = 0;
}
info->break_detected_cnt = 0;
@@ -2825,16 +2810,12 @@
log_int(rdpc(), 0, 0);
}
);
- *tty->flip.char_buf_ptr = IO_EXTRACT(R_SERIAL0_READ, data_in, data_read);
- *tty->flip.flag_buf_ptr = 0;
+ tty_insert_flip_char(tty, IO_EXTRACT(R_SERIAL0_READ, data_in, data_read), TTY_NORMAL);
} else {
DEBUG_LOG(info->line, "ser_rx int but no data_avail %08lX\n", data_read);
}
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
info->icount.rx++;
data_read = *((unsigned long *)&info->port[REG_DATA_STATUS32]);
if (data_read & IO_MASK(R_SERIAL0_READ, data_avail)) {
@@ -2972,7 +2953,7 @@
if (info->x_char) {
unsigned char rstat;
DFLOW(DEBUG_LOG(info->line, "tx_int: xchar 0x%02X\n", info->x_char));
- save_flags(flags); cli();
+ local_irq_save(flags);
rstat = info->port[REG_STATUS];
DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat));
@@ -2981,7 +2962,7 @@
info->x_char = 0;
/* We must enable since it is disabled in ser_interrupt */
e100_enable_serial_tx_ready_irq(info);
- restore_flags(flags);
+ local_irq_restore(flags);
return;
}
if (info->uses_dma_out) {
@@ -2989,7 +2970,7 @@
int i;
/* We only use normal tx interrupt when sending x_char */
DFLOW(DEBUG_LOG(info->line, "tx_int: xchar sent\n", 0));
- save_flags(flags); cli();
+ local_irq_save(flags);
rstat = info->port[REG_STATUS];
DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat));
e100_disable_serial_tx_ready_irq(info);
@@ -3002,7 +2983,7 @@
nop();
*info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, continue);
- restore_flags(flags);
+ local_irq_restore(flags);
return;
}
/* Normal char-by-char interrupt */
@@ -3016,7 +2997,7 @@
}
DINTR2(DEBUG_LOG(info->line, "tx_int %c\n", info->xmit.buf[info->xmit.tail]));
/* Send a byte, rs485 timing is critical so turn of ints */
- save_flags(flags); cli();
+ local_irq_save(flags);
info->port[REG_TR_DATA] = info->xmit.buf[info->xmit.tail];
info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1);
info->icount.tx++;
@@ -3040,7 +3021,7 @@
/* We must enable since it is disabled in ser_interrupt */
e100_enable_serial_tx_ready_irq(info);
}
- restore_flags(flags);
+ local_irq_restore(flags);
if (CIRC_CNT(info->xmit.head,
info->xmit.tail,
@@ -3065,7 +3046,7 @@
int handled = 0;
static volatile unsigned long reentered_ready_mask = 0;
- save_flags(flags); cli();
+ local_irq_save(flags);
irq_mask1_rd = *R_IRQ_MASK1_RD;
/* First handle all rx interrupts with ints disabled */
info = rs_table;
@@ -3110,7 +3091,7 @@
/* Unblock the serial interrupt */
*R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set);
- sti();
+ local_irq_enable();
ready_mask = (1 << (8+1+2*0)); /* ser0 tr_ready */
info = rs_table;
for (i = 0; i < NR_PORTS; i++) {
@@ -3123,11 +3104,11 @@
ready_mask <<= 2;
}
/* handle_ser_tx_interrupt enables tr_ready interrupts */
- cli();
+ local_irq_disable();
/* Handle reentered TX interrupt */
irq_mask1_rd = reentered_ready_mask;
}
- cli();
+ local_irq_disable();
tx_started = 0;
} else {
unsigned long ready_mask;
@@ -3143,7 +3124,7 @@
}
}
- restore_flags(flags);
+ local_irq_restore(flags);
return IRQ_RETVAL(handled);
} /* ser_interrupt */
#endif
@@ -3164,11 +3145,13 @@
* them using rs_sched_event(), and they get done here.
*/
static void
-do_softint(void *private_)
+do_softint(struct work_struct* work)
{
- struct e100_serial *info = (struct e100_serial *) private_;
+ struct e100_serial *info;
struct tty_struct *tty;
+ info = container_of(work, struct e100_serial, work);
+
tty = info->tty;
if (!tty)
return;
@@ -3188,13 +3171,12 @@
if (!xmit_page)
return -ENOMEM;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
/* if it was already initialized, skip this */
if (info->flags & ASYNC_INITIALIZED) {
- restore_flags(flags);
+ local_irq_restore(flags);
free_page(xmit_page);
return 0;
}
@@ -3320,7 +3302,7 @@
info->flags |= ASYNC_INITIALIZED;
- restore_flags(flags);
+ local_irq_restore(flags);
return 0;
}
@@ -3371,8 +3353,7 @@
info->irq);
#endif
- save_flags(flags);
- cli(); /* Disable interrupts */
+ local_irq_save(flags);
if (info->xmit.buf) {
free_page((unsigned long)info->xmit.buf);
@@ -3396,7 +3377,7 @@
set_bit(TTY_IO_ERROR, &info->tty->flags);
info->flags &= ~ASYNC_INITIALIZED;
- restore_flags(flags);
+ local_irq_restore(flags);
}
@@ -3454,7 +3435,6 @@
DBAUD(printk("using external baudrate: %lu\n", CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8));
info->baud = CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8;
}
- }
#endif
else
{
@@ -3488,8 +3468,7 @@
#ifndef CONFIG_SVINTO_SIM
/* start with default settings and then fill in changes */
- save_flags(flags);
- cli();
+ local_irq_save(flags);
/* 8 bit, no/even parity */
info->rx_ctrl &= ~(IO_MASK(R_SERIAL0_REC_CTRL, rec_bitnr) |
IO_MASK(R_SERIAL0_REC_CTRL, rec_par_en) |
@@ -3553,7 +3532,7 @@
}
*((unsigned long *)&info->port[REG_XOFF]) = xoff;
- restore_flags(flags);
+ local_irq_restore(flags);
#endif /* !CONFIG_SVINTO_SIM */
update_char_time(info);
@@ -3581,13 +3560,12 @@
/* this protection might not exactly be necessary here */
- save_flags(flags);
- cli();
+ local_irq_save(flags);
start_transmit(info);
- restore_flags(flags);
+ local_irq_restore(flags);
}
-static int rs_raw_write(struct tty_struct * tty, int from_user,
+static int rs_raw_write(struct tty_struct * tty,
const unsigned char *buf, int count)
{
int c, ret = 0;
@@ -3610,53 +3588,19 @@
SIMCOUT(buf, count);
return count;
#endif
- save_flags(flags);
+ local_save_flags(flags);
DFLOW(DEBUG_LOG(info->line, "write count %i ", count));
DFLOW(DEBUG_LOG(info->line, "ldisc %i\n", tty->ldisc.chars_in_buffer(tty)));
- /* the cli/restore_flags pairs below are needed because the
+ /* the local_irq_disable/restore_flags pairs below are needed because the
* DMA interrupt handler moves the info->xmit values. the memcpy
* needs to be in the critical region unfortunately, because we
* need to read xmit values, memcpy, write xmit values in one
* atomic operation... this could perhaps be avoided by more clever
* design.
*/
- if (from_user) {
- mutex_lock(&tmp_buf_mutex);
- while (1) {
- int c1;
- c = CIRC_SPACE_TO_END(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE);
- if (count < c)
- c = count;
- if (c <= 0)
- break;
-
- c -= copy_from_user(tmp_buf, buf, c);
- if (!c) {
- if (!ret)
- ret = -EFAULT;
- break;
- }
- cli();
- c1 = CIRC_SPACE_TO_END(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE);
- if (c1 < c)
- c = c1;
- memcpy(info->xmit.buf + info->xmit.head, tmp_buf, c);
- info->xmit.head = ((info->xmit.head + c) &
- (SERIAL_XMIT_SIZE-1));
- restore_flags(flags);
- buf += c;
- count -= c;
- ret += c;
- }
- mutex_unlock(&tmp_buf_mutex);
- } else {
- cli();
+ local_irq_disable();
while (count) {
c = CIRC_SPACE_TO_END(info->xmit.head,
info->xmit.tail,
@@ -3674,8 +3618,7 @@
count -= c;
ret += c;
}
- restore_flags(flags);
- }
+ local_irq_restore(flags);
/* enable transmitter if not running, unless the tty is stopped
* this does not need IRQ protection since if tr_running == 0
@@ -3694,7 +3637,7 @@
} /* raw_raw_write() */
static int
-rs_write(struct tty_struct * tty, int from_user,
+rs_write(struct tty_struct * tty,
const unsigned char *buf, int count)
{
#if defined(CONFIG_ETRAX_RS485)
@@ -3721,7 +3664,7 @@
}
#endif /* CONFIG_ETRAX_RS485 */
- count = rs_raw_write(tty, from_user, buf, count);
+ count = rs_raw_write(tty, buf, count);
#if defined(CONFIG_ETRAX_RS485)
if (info->rs485.enabled)
@@ -3789,10 +3732,9 @@
struct e100_serial *info = (struct e100_serial *)tty->driver_data;
unsigned long flags;
- save_flags(flags);
- cli();
+ local_irq_save(flags);
info->xmit.head = info->xmit.tail = 0;
- restore_flags(flags);
+ local_irq_restore(flags);
tty_wakeup(tty);
}
@@ -3810,7 +3752,7 @@
{
struct e100_serial *info = (struct e100_serial *)tty->driver_data;
unsigned long flags;
- save_flags(flags); cli();
+ local_irq_save(flags);
if (info->uses_dma_out) {
/* Put the DMA on hold and disable the channel */
*info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, hold);
@@ -3827,7 +3769,7 @@
DFLOW(DEBUG_LOG(info->line, "rs_send_xchar 0x%02X\n", ch));
info->x_char = ch;
e100_enable_serial_tx_ready_irq(info);
- restore_flags(flags);
+ local_irq_restore(flags);
}
/*
@@ -4039,120 +3981,89 @@
}
#endif
-static int
-get_modem_info(struct e100_serial * info, unsigned int *value)
+static void
+rs_break(struct tty_struct *tty, int break_state)
{
- unsigned int result;
- /* Polarity isn't verified */
-#if 0 /*def SERIAL_DEBUG_IO */
-
- printk("get_modem_info: RTS: %i DTR: %i CD: %i RI: %i DSR: %i CTS: %i\n",
- E100_RTS_GET(info),
- E100_DTR_GET(info),
- E100_CD_GET(info),
- E100_RI_GET(info),
- E100_DSR_GET(info),
- E100_CTS_GET(info));
-#endif
-
- result =
- (!E100_RTS_GET(info) ? TIOCM_RTS : 0)
- | (!E100_DTR_GET(info) ? TIOCM_DTR : 0)
- | (!E100_RI_GET(info) ? TIOCM_RNG : 0)
- | (!E100_DSR_GET(info) ? TIOCM_DSR : 0)
- | (!E100_CD_GET(info) ? TIOCM_CAR : 0)
- | (!E100_CTS_GET(info) ? TIOCM_CTS : 0);
+ struct e100_serial * info = (struct e100_serial *)tty->driver_data;
+ unsigned long flags;
-#ifdef SERIAL_DEBUG_IO
- printk("e100ser: modem state: %i 0x%08X\n", result, result);
- {
- char s[100];
+ if (!info->port)
+ return;
- get_control_state_str(result, s);
- printk("state: %s\n", s);
+ local_irq_save(flags);
+ if (break_state == -1) {
+ /* Go to manual mode and set the txd pin to 0 */
+ info->tx_ctrl &= 0x3F; /* Clear bit 7 (txd) and 6 (tr_enable) */
+ } else {
+ info->tx_ctrl |= (0x80 | 0x40); /* Set bit 7 (txd) and 6 (tr_enable) */
}
-#endif
- if (copy_to_user(value, &result, sizeof(int)))
- return -EFAULT;
- return 0;
+ info->port[REG_TR_CTRL] = info->tx_ctrl;
+ local_irq_restore(flags);
}
-
static int
-set_modem_info(struct e100_serial * info, unsigned int cmd,
- unsigned int *value)
+rs_tiocmset(struct tty_struct *tty, struct file * file, unsigned int set, unsigned int clear)
{
- unsigned int arg;
-
- if (copy_from_user(&arg, value, sizeof(int)))
- return -EFAULT;
+ struct e100_serial * info = (struct e100_serial *)tty->driver_data;
- switch (cmd) {
- case TIOCMBIS:
- if (arg & TIOCM_RTS) {
- e100_rts(info, 1);
- }
- if (arg & TIOCM_DTR) {
- e100_dtr(info, 1);
- }
- /* Handle FEMALE behaviour */
- if (arg & TIOCM_RI) {
- e100_ri_out(info, 1);
- }
- if (arg & TIOCM_CD) {
- e100_cd_out(info, 1);
- }
- break;
- case TIOCMBIC:
- if (arg & TIOCM_RTS) {
+ if (clear & TIOCM_RTS) {
e100_rts(info, 0);
}
- if (arg & TIOCM_DTR) {
+ if (clear & TIOCM_DTR) {
e100_dtr(info, 0);
}
/* Handle FEMALE behaviour */
- if (arg & TIOCM_RI) {
+ if (clear & TIOCM_RI) {
e100_ri_out(info, 0);
}
- if (arg & TIOCM_CD) {
+ if (clear & TIOCM_CD) {
e100_cd_out(info, 0);
}
- break;
- case TIOCMSET:
- e100_rts(info, arg & TIOCM_RTS);
- e100_dtr(info, arg & TIOCM_DTR);
+
+ if (set & TIOCM_RTS) {
+ e100_rts(info, 1);
+ }
+ if (set & TIOCM_DTR) {
+ e100_dtr(info, 1);
+ }
/* Handle FEMALE behaviour */
- e100_ri_out(info, arg & TIOCM_RI);
- e100_cd_out(info, arg & TIOCM_CD);
- break;
- default:
- return -EINVAL;
+ if (set & TIOCM_RI) {
+ e100_ri_out(info, 1);
+ }
+ if (set & TIOCM_CD) {
+ e100_cd_out(info, 1);
}
return 0;
}
-
-static void
-rs_break(struct tty_struct *tty, int break_state)
+static int
+rs_tiocmget(struct tty_struct *tty, struct file *file)
{
struct e100_serial * info = (struct e100_serial *)tty->driver_data;
- unsigned long flags;
+ unsigned int result;
- if (!info->port)
- return;
+ result =
+ (!E100_RTS_GET(info) ? TIOCM_RTS : 0)
+ | (!E100_DTR_GET(info) ? TIOCM_DTR : 0)
+ | (!E100_RI_GET(info) ? TIOCM_RNG : 0)
+ | (!E100_DSR_GET(info) ? TIOCM_DSR : 0)
+ | (!E100_CD_GET(info) ? TIOCM_CAR : 0)
+ | (!E100_CTS_GET(info) ? TIOCM_CTS : 0);
- save_flags(flags);
- cli();
- if (break_state == -1) {
- /* Go to manual mode and set the txd pin to 0 */
- info->tx_ctrl &= 0x3F; /* Clear bit 7 (txd) and 6 (tr_enable) */
- } else {
- info->tx_ctrl |= (0x80 | 0x40); /* Set bit 7 (txd) and 6 (tr_enable) */
+#ifdef SERIAL_DEBUG_IO
+ printk("ser%i: modem state: %i 0x%08X\n", info->line, result, result);
+ {
+ char s[100];
+
+ get_control_state_str(result, s);
+ printk("state: %s\n", s);
}
- info->port[REG_TR_CTRL] = info->tx_ctrl;
- restore_flags(flags);
+#endif
+ return result;
+
}
+
static int
rs_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
@@ -4167,12 +4078,6 @@
}
switch (cmd) {
- case TIOCMGET:
- return get_modem_info(info, (unsigned int *) arg);
- case TIOCMBIS:
- case TIOCMBIC:
- case TIOCMSET:
- return set_modem_info(info, cmd, (unsigned int *) arg);
case TIOCGSERIAL:
return get_serial_info(info,
(struct serial_struct *) arg);
@@ -4204,7 +4109,7 @@
if (copy_from_user(&rs485wr, (struct rs485_write*)arg, sizeof(rs485wr)))
return -EFAULT;
- return e100_write_rs485(tty, 1, rs485wr.outc, rs485wr.outc_size);
+ return e100_write_rs485(tty, rs485wr.outc, rs485wr.outc_size);
}
#endif
@@ -4234,46 +4139,6 @@
}
-/* In debugport.c - register a console write function that uses the normal
- * serial driver
- */
-typedef int (*debugport_write_function)(int i, const char *buf, unsigned int len);
-
-extern debugport_write_function debug_write_function;
-
-static int rs_debug_write_function(int i, const char *buf, unsigned int len)
-{
- int cnt;
- int written = 0;
- struct tty_struct *tty;
- static int recurse_cnt = 0;
-
- tty = rs_table[i].tty;
- if (tty) {
- unsigned long flags;
- if (recurse_cnt > 5) /* We skip this debug output */
- return 1;
-
- local_irq_save(flags);
- recurse_cnt++;
- local_irq_restore(flags);
- do {
- cnt = rs_write(tty, 0, buf + written, len);
- if (cnt >= 0) {
- written += cnt;
- buf += cnt;
- len -= cnt;
- } else
- len = cnt;
- } while(len > 0);
- local_irq_save(flags);
- recurse_cnt--;
- local_irq_restore(flags);
- return 1;
- }
- return 0;
-}
-
/*
* ------------------------------------------------------------
* rs_close()
@@ -4295,11 +4160,10 @@
/* interrupts are disabled for this entire function */
- save_flags(flags);
- cli();
+ local_irq_save(flags);
if (tty_hung_up_p(filp)) {
- restore_flags(flags);
+ local_irq_restore(flags);
return;
}
@@ -4326,7 +4190,7 @@
info->count = 0;
}
if (info->count) {
- restore_flags(flags);
+ local_irq_restore(flags);
return;
}
info->flags |= ASYNC_CLOSING;
@@ -4380,7 +4244,7 @@
}
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&info->close_wait);
- restore_flags(flags);
+ local_irq_restore(flags);
/* port closed */
@@ -4402,6 +4266,28 @@
#endif
}
#endif
+
+ /*
+ * Release any allocated DMA irq's.
+ */
+ if (info->dma_in_enabled) {
+ cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
+ free_irq(info->dma_in_irq_nbr,
+ info);
+ info->uses_dma_in = 0;
+#ifdef SERIAL_DEBUG_OPEN
+ printk("DMA irq '%s' freed\n", info->dma_in_irq_description);
+#endif
+ }
+ if (info->dma_out_enabled) {
+ free_irq(info->dma_out_irq_nbr,
+ info);
+ cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
+ info->uses_dma_out = 0;
+#ifdef SERIAL_DEBUG_OPEN
+ printk("DMA irq '%s' freed\n", info->dma_out_irq_description);
+#endif
+ }
}
/*
@@ -4477,7 +4363,7 @@
if (tty_hung_up_p(filp) ||
(info->flags & ASYNC_CLOSING)) {
if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
+ wait_event_interruptible(info->close_wait, 0);
#ifdef SERIAL_DO_RESTART
if (info->flags & ASYNC_HUP_NOTIFY)
return -EAGAIN;
@@ -4515,21 +4401,19 @@
printk("block_til_ready before block: ttyS%d, count = %d\n",
info->line, info->count);
#endif
- save_flags(flags);
- cli();
+ local_irq_save(flags);
if (!tty_hung_up_p(filp)) {
extra_count++;
info->count--;
}
- restore_flags(flags);
+ local_irq_restore(flags);
info->blocked_open++;
while (1) {
- save_flags(flags);
- cli();
+ local_irq_save(flags);
/* assert RTS and DTR */
e100_rts(info, 1);
e100_dtr(info, 1);
- restore_flags(flags);
+ local_irq_restore(flags);
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) ||
!(info->flags & ASYNC_INITIALIZED)) {
@@ -4581,9 +4465,9 @@
struct e100_serial *info;
int retval, line;
unsigned long page;
+ int allocated_resources = 0;
/* find which port we want to open */
-
line = tty->index;
if (line < 0 || line >= NR_PORTS)
@@ -4624,7 +4508,7 @@
if (tty_hung_up_p(filp) ||
(info->flags & ASYNC_CLOSING)) {
if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
+ wait_event_interruptible(info->close_wait, 0);
#ifdef SERIAL_DO_RESTART
return ((info->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
@@ -4634,19 +4518,99 @@
}
/*
+ * If DMA is enabled try to allocate the irq's.
+ */
+ if (info->count == 1) {
+ allocated_resources = 1;
+ if (info->dma_in_enabled) {
+ if (request_irq(info->dma_in_irq_nbr,
+ rec_interrupt,
+ info->dma_in_irq_flags,
+ info->dma_in_irq_description,
+ info)) {
+ printk(KERN_WARNING "DMA irq '%s' busy; falling back to non-DMA mode\n", info->dma_in_irq_description);
+ /* Make sure we never try to use DMA in for the port again. */
+ info->dma_in_enabled = 0;
+ } else if (cris_request_dma(info->dma_in_nbr,
+ info->dma_in_irq_description,
+ DMA_VERBOSE_ON_ERROR,
+ info->dma_owner)) {
+ free_irq(info->dma_in_irq_nbr, info);
+ printk(KERN_WARNING "DMA '%s' busy; falling back to non-DMA mode\n", info->dma_in_irq_description);
+ /* Make sure we never try to use DMA in for the port again. */
+ info->dma_in_enabled = 0;
+ }
+#ifdef SERIAL_DEBUG_OPEN
+ else printk("DMA irq '%s' allocated\n", info->dma_in_irq_description);
+#endif
+ }
+ if (info->dma_out_enabled) {
+ if (request_irq(info->dma_out_irq_nbr,
+ tr_interrupt,
+ info->dma_out_irq_flags,
+ info->dma_out_irq_description,
+ info)) {
+ printk(KERN_WARNING "DMA irq '%s' busy; falling back to non-DMA mode\n", info->dma_out_irq_description);
+ /* Make sure we never try to use DMA out for the port again. */
+ info->dma_out_enabled = 0;
+ } else if (cris_request_dma(info->dma_out_nbr,
+ info->dma_out_irq_description,
+ DMA_VERBOSE_ON_ERROR,
+ info->dma_owner)) {
+ free_irq(info->dma_out_irq_nbr, info);
+ printk(KERN_WARNING "DMA '%s' busy; falling back to non-DMA mode\n", info->dma_out_irq_description);
+ /* Make sure we never try to use DMA in for the port again. */
+ info->dma_out_enabled = 0;
+ }
+#ifdef SERIAL_DEBUG_OPEN
+ else printk("DMA irq '%s' allocated\n", info->dma_out_irq_description);
+#endif
+ }
+ }
+
+ /*
* Start up the serial port
*/
retval = startup(info);
- if (retval)
+ if (retval) {
+ if (allocated_resources) {
+ if (info->dma_out_enabled) {
+ cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
+ free_irq(info->dma_out_irq_nbr,
+ info);
+ }
+ if (info->dma_in_enabled) {
+ cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
+ free_irq(info->dma_in_irq_nbr,
+ info);
+ }
+ }
+ /* FIXME Decrease count info->count here too? */
return retval;
+ }
+
+
retval = block_til_ready(tty, filp, info);
if (retval) {
#ifdef SERIAL_DEBUG_OPEN
printk("rs_open returning after block_til_ready with %d\n",
retval);
#endif
+ if (allocated_resources) {
+ if (info->dma_out_enabled) {
+ cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
+ free_irq(info->dma_out_irq_nbr,
+ info);
+ }
+ if (info->dma_in_enabled) {
+ cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
+ free_irq(info->dma_in_irq_nbr,
+ info);
+ }
+ }
+
return retval;
}
@@ -4836,6 +4800,8 @@
.send_xchar = rs_send_xchar,
.wait_until_sent = rs_wait_until_sent,
.read_proc = rs_read_proc,
+ .tiocmget = rs_tiocmget,
+ .tiocmset = rs_tiocmset
};
static int __init
@@ -4855,7 +4821,22 @@
#if !defined(CONFIG_ETRAX_SERIAL_FAST_TIMER)
init_timer(&flush_timer);
flush_timer.function = timed_flush_handler;
- mod_timer(&flush_timer, jiffies + CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS);
+ mod_timer(&flush_timer, jiffies + 5);
+#endif
+
+#if defined(CONFIG_ETRAX_RS485)
+#if defined(CONFIG_ETRAX_RS485_ON_PA)
+ if (cris_io_interface_allocate_pins(if_ser0, 'a', rs485_pa_bit, rs485_pa_bit)) {
+ printk(KERN_CRIT "ETRAX100LX serial: Could not allocate RS485 pin\n");
+ return -EBUSY;
+ }
+#endif
+#if defined(CONFIG_ETRAX_RS485_ON_PORT_G)
+ if (cris_io_interface_allocate_pins(if_ser0, 'g', rs485_pa_bit, rs485_port_g_bit)) {
+ printk(KERN_CRIT "ETRAX100LX serial: Could not allocate RS485 pin\n");
+ return -EBUSY;
+ }
+#endif
#endif
/* Initialize the tty_driver structure */
@@ -4882,6 +4863,14 @@
/* do some initializing for the separate ports */
for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) {
+ if (info->enabled) {
+ if (cris_request_io_interface(info->io_if, info->io_if_description)) {
+ printk(KERN_CRIT "ETRAX100LX async serial: Could not allocate IO pins for %s, port %d\n",
+ info->io_if_description,
+ i);
+ info->enabled = 0;
+ }
+ }
info->uses_dma_in = 0;
info->uses_dma_out = 0;
info->line = i;
@@ -4915,7 +4904,7 @@
info->rs485.delay_rts_before_send = 0;
info->rs485.enabled = 0;
#endif
- INIT_WORK(&info->work, do_softint, info);
+ INIT_WORK(&info->work, do_softint);
if (info->enabled) {
printk(KERN_INFO "%s%d at 0x%x is a builtin UART with DMA\n",
@@ -4933,64 +4922,16 @@
#endif
#ifndef CONFIG_SVINTO_SIM
+#ifndef CONFIG_ETRAX_KGDB
/* Not needed in simulator. May only complicate stuff. */
/* hook the irq's for DMA channel 6 and 7, serial output and input, and some more... */
- if (request_irq(SERIAL_IRQ_NBR, ser_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial ", NULL))
- panic("irq8");
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT0
-#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
- if (request_irq(SER0_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_DISABLED, "serial 0 dma tr", NULL))
- panic("irq22");
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
- if (request_irq(SER0_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_DISABLED, "serial 0 dma rec", NULL))
- panic("irq23");
-#endif
-#endif
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT1
-#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT
- if (request_irq(SER1_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_DISABLED, "serial 1 dma tr", NULL))
- panic("irq24");
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN
- if (request_irq(SER1_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_DISABLED, "serial 1 dma rec", NULL))
- panic("irq25");
-#endif
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
- /* DMA Shared with par0 (and SCSI0 and ATA) */
-#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
- if (request_irq(SER2_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 2 dma tr", NULL))
- panic("irq18");
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
- if (request_irq(SER2_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 2 dma rec", NULL))
- panic("irq19");
-#endif
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT3
- /* DMA Shared with par1 (and SCSI1 and Extern DMA 0) */
-#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT
- if (request_irq(SER3_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 3 dma tr", NULL))
- panic("irq20");
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN
- if (request_irq(SER3_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 3 dma rec", NULL))
- panic("irq21");
-#endif
-#endif
+ if (request_irq(SERIAL_IRQ_NBR, ser_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial ", driver))
+ panic("%s: Failed to request irq8", __FUNCTION__);
-#ifdef CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST
- if (request_irq(TIMER1_IRQ_NBR, timeout_interrupt, IRQF_SHARED | IRQF_DISABLED,
- "fast serial dma timeout", NULL)) {
- printk(KERN_CRIT "err: timer1 irq\n");
- }
#endif
#endif /* CONFIG_SVINTO_SIM */
- debug_write_function = rs_debug_write_function;
+
return 0;
}
--- /dev/null 2007-10-06 06:38:38.348072750 +0200
+++ linux-2.6.23-mod/drivers/serial/crisv10.h 2007-10-26 14:14:00.000000000 +0200
@@ -0,0 +1,151 @@
+/*
+ * serial.h: Arch-dep definitions for the Etrax100 serial driver.
+ *
+ * Copyright (C) 1998-2007 Axis Communications AB
+ */
+
+#ifndef _ETRAX_SERIAL_H
+#define _ETRAX_SERIAL_H
+
+#include <linux/circ_buf.h>
+#include <asm/termios.h>
+#include <asm/dma.h>
+#include <asm/arch/io_interface_mux.h>
+
+/* Software state per channel */
+
+#ifdef __KERNEL__
+/*
+ * This is our internal structure for each serial port's state.
+ *
+ * Many fields are paralleled by the structure used by the serial_struct
+ * structure.
+ *
+ * For definitions of the flags field, see tty.h
+ */
+
+#define SERIAL_RECV_DESCRIPTORS 8
+
+struct etrax_recv_buffer {
+ struct etrax_recv_buffer *next;
+ unsigned short length;
+ unsigned char error;
+ unsigned char pad;
+
+ unsigned char buffer[0];
+};
+
+struct e100_serial {
+ int baud;
+ volatile u8 *port; /* R_SERIALx_CTRL */
+ u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */
+
+ /* Output registers */
+ volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
+ volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */
+ volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */
+ const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */
+
+ /* Input registers */
+ volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
+ volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */
+ 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 */
+ int enabled; /* Set to 1 if the port is enabled in HW config */
+
+ u8 dma_out_enabled:1; /* Set to 1 if DMA should be used */
+ u8 dma_in_enabled:1; /* Set to 1 if DMA should be used */
+
+ /* end of fields defined in rs_table[] in .c-file */
+ int dma_owner;
+ unsigned int dma_in_nbr;
+ unsigned int dma_out_nbr;
+ unsigned int dma_in_irq_nbr;
+ unsigned int dma_out_irq_nbr;
+ unsigned long dma_in_irq_flags;
+ unsigned long dma_out_irq_flags;
+ char *dma_in_irq_description;
+ char *dma_out_irq_description;
+
+ enum cris_io_interface io_if;
+ char *io_if_description;
+
+ u8 uses_dma_in; /* Set to 1 if DMA is used */
+ u8 uses_dma_out; /* Set to 1 if DMA is used */
+ u8 forced_eop; /* a fifo eop has been forced */
+ int baud_base; /* For special baudrates */
+ int custom_divisor; /* For special baudrates */
+ struct etrax_dma_descr tr_descr;
+ struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS];
+ int cur_rec_descr;
+
+ 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;
+ unsigned int recv_cnt;
+ unsigned int max_recv_cnt;
+
+ struct work_struct work;
+ struct async_icount icount; /* error-statistics etc.*/
+ struct ktermios normal_termios;
+ struct ktermios callout_termios;
+#ifdef DECLARE_WAITQUEUE
+ wait_queue_head_t open_wait;
+ wait_queue_head_t close_wait;
+#else
+ struct wait_queue *open_wait;
+ struct wait_queue *close_wait;
+#endif
+
+ unsigned long char_time_usec; /* The time for 1 char, in usecs */
+ unsigned long flush_time_usec; /* How often we should flush */
+ unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */
+ unsigned long last_tx_active; /* Last tx time in jiffies */
+ unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */
+ unsigned long last_rx_active; /* Last rx time in jiffies */
+
+ int break_detected_cnt;
+ int errorcode;
+
+#ifdef CONFIG_ETRAX_RS485
+ struct rs485_control rs485; /* RS-485 support */
+#endif
+};
+
+/* this PORT is not in the standard serial.h. it's not actually used for
+ * anything since we only have one type of async serial-port anyway in this
+ * system.
+ */
+
+#define PORT_ETRAX 1
+
+/*
+ * Events are used to schedule things to happen at timer-interrupt
+ * time, instead of at rs interrupt time.
+ */
+#define RS_EVENT_WRITE_WAKEUP 0
+
+#endif /* __KERNEL__ */
+
+#endif /* !_ETRAX_SERIAL_H */
/^JN - Jesper Nilsson
--
Jesper Nilsson -- [email protected]
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