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Commit 77accbf5 authored by Jesper Nilsson's avatar Jesper Nilsson Committed by Linus Torvalds
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CRISv10 serial driver rewrite 

New and improved serial driver for CRISv10, take three, with improvements
suggested by Jiri Slaby.

- Call wait_event_interruptible with a _correct_ and sensible condition.
- Removed superfluous test of info->flags & ASYNC_CLOSING, since that is done
  by wait_event_interruptible.
- Moved common code for deregistering DMA and IRQ to deinit_port function.
- Use setup_timer when initializing flush_timer.
- Convert bit-field for uses_dma_in and uses_dma_out to regular bytes.
- Removed CVS tags.
- Removed defines and comments for CRIS_BUF_SIZE and TTY_THRESHOLD_THROTTLE
  (no longer used).
- Cleaned up code to pass checkpatch.
- Add crisv10.h header file.
- Merge of CRISv10 from Axis internal CVS.
Signed-off-by: default avatarJesper Nilsson <jesper.nilsson@axis.com>
Reviewed-by: default avatarJiri Slaby <jirislaby@gmail.com>
Cc: Mikael Starvik <starvik@axis.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4b7e8889
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drivers/serial/crisv10.c
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/* $Id: serial.c,v 1.25 2004/09/29 10:33:49 starvik Exp $
*
/*
* 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.
*
* $Log: serial.c,v $
* Revision 1.25 2004/09/29 10:33:49 starvik
* Resolved a dealock when printing debug from kernel.
*
* Revision 1.24 2004/08/27 23:25:59 johana
* rs_set_termios() must call change_speed() if c_iflag has changed or
* automatic XOFF handling will be enabled and transmitter will stop
* if 0x13 is received.
*
* Revision 1.23 2004/08/24 06:57:13 starvik
* More whitespace cleanup
*
* Revision 1.22 2004/08/24 06:12:20 starvik
* Whitespace cleanup
*
* Revision 1.20 2004/05/24 12:00:20 starvik
* Big merge of stuff from Linux 2.4 (e.g. manual mode for the serial port).
*
* Revision 1.19 2004/05/17 13:12:15 starvik
* Kernel console hook
* Big merge from Linux 2.4 still pending.
*
* Revision 1.18 2003/10/28 07:18:30 starvik
* Compiles with debug info
*
* Revision 1.17 2003/07/04 08:27:37 starvik
* Merge of Linux 2.5.74
*
* Revision 1.16 2003/06/13 10:05:19 johana
* Help the user to avoid trouble by:
* Forcing mixed mode for status/control lines if not all pins are used.
*
* Revision 1.15 2003/06/13 09:43:01 johana
* Merged in the following changes from os/linux/arch/cris/drivers/serial.c
* + some minor changes to reduce diff.
*
* Revision 1.49 2003/05/30 11:31:54 johana
* Merged in change-branch--serial9bit that adds CMSPAR support for sticky
* parity (mark/space)
*
* Revision 1.48 2003/05/30 11:03:57 johana
* Implemented rs_send_xchar() by disabling the DMA and writing manually.
* Added e100_disable_txdma_channel() and e100_enable_txdma_channel().
* Fixed rs_throttle() and rs_unthrottle() to properly call rs_send_xchar
* instead of setting info->x_char and check the CRTSCTS flag before
* controlling the rts pin.
*
* Revision 1.14 2003/04/09 08:12:44 pkj
* Corrected typo changes made upstream.
*
* Revision 1.13 2003/04/09 05:20:47 starvik
* Merge of Linux 2.5.67
*
* Revision 1.11 2003/01/22 06:48:37 starvik
* Fixed warnings issued by GCC 3.2.1
*
* Revision 1.9 2002/12/13 09:07:47 starvik
* Alert user that RX_TIMEOUT_TICKS==0 doesn't work
*
* Revision 1.8 2002/12/11 13:13:57 starvik
* Added arch/ to v10 specific includes
* Added fix from Linux 2.4 in serial.c (flush_to_flip_buffer)
*
* Revision 1.7 2002/12/06 07:13:57 starvik
* Corrected work queue stuff
* Removed CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST
*
* Revision 1.6 2002/11/21 07:17:46 starvik
* Change static inline to extern inline where otherwise outlined with gcc-3.2
*
* Revision 1.5 2002/11/14 15:59:49 starvik
* Linux 2.5 port of the latest serial driver from 2.4. The work queue stuff
* probably doesn't work yet.
*
* Revision 1.42 2002/11/05 09:08:47 johana
* Better implementation of rs_stop() and rs_start() that uses the XOFF
* register to start/stop transmission.
* change_speed() also initilises XOFF register correctly so that
* auto_xoff is enabled when IXON flag is set by user.
* This gives fast XOFF response times.
*
* Revision 1.41 2002/11/04 18:40:57 johana
* Implemented rs_stop() and rs_start().
* Simple tests using hwtestserial indicates that this should be enough
* to make it work.
*
* Revision 1.40 2002/10/14 05:33:18 starvik
* RS-485 uses fast timers even if SERIAL_FAST_TIMER is disabled
*
* Revision 1.39 2002/09/30 21:00:57 johana
* Support for CONFIG_ETRAX_SERx_DTR_RI_DSR_CD_MIXED where the status and
* control pins can be mixed between PA and PB.
* If no serial port uses MIXED old solution is used
* (saves a few bytes and cycles).
* control_pins struct uses masks instead of bit numbers.
* Corrected dummy values and polarity in line_info() so
* /proc/tty/driver/serial is now correct.
* (the E100_xxx_GET() macros is really active low - perhaps not obvious)
*
* Revision 1.38 2002/08/23 11:01:36 starvik
* Check that serial port is enabled in all interrupt handlers to avoid
* restarts of DMA channels not assigned to serial ports
*
* Revision 1.37 2002/08/13 13:02:37 bjornw
* Removed some warnings because of unused code
*
* Revision 1.36 2002/08/08 12:50:01 starvik
* Serial interrupt is shared with synchronous serial port driver
*
* Revision 1.35 2002/06/03 10:40:49 starvik
* Increased RS-485 RTS toggle timer to 2 characters
*
* Revision 1.34 2002/05/28 18:59:36 johana
* Whitespace and comment fixing to be more like etrax100ser.c 1.71.
*
* Revision 1.33 2002/05/28 17:55:43 johana
* RS-485 uses FAST_TIMER if enabled, and starts a short (one char time)
* timer from tranismit_chars (interrupt context).
* The timer toggles RTS in interrupt context when expired giving minimum
* latencies.
*
* Revision 1.32 2002/05/22 13:58:00 johana
* Renamed rs_write() to raw_write() and made it inline.
* New rs_write() handles RS-485 if configured and enabled
* (moved code from e100_write_rs485()).
* RS-485 ioctl's uses copy_from_user() instead of verify_area().
*
* Revision 1.31 2002/04/22 11:20:03 johana
* Updated copyright years.
*
* Revision 1.30 2002/04/22 09:39:12 johana
* RS-485 support compiles.
*
* Revision 1.29 2002/01/14 16:10:01 pkj
* Allocate the receive buffers dynamically. The static 4kB buffer was
* too small for the peaks. This means that we can get rid of the extra
* buffer and the copying to it. It also means we require less memory
* under normal operations, but can use more when needed (there is a
* cap at 64kB for safety reasons). If there is no memory available
* we panic(), and die a horrible death...
*
* Revision 1.28 2001/12/18 15:04:53 johana
* Cleaned up write_rs485() - now it works correctly without padding extra
* char.
* Added sane default initialisation of rs485.
* Added #ifdef around dummy variables.
*
* Revision 1.27 2001/11/29 17:00:41 pkj
* 2kB seems to be too small a buffer when using 921600 bps,
* so increase it to 4kB (this was already done for the elinux
* version of the serial driver).
*
* Revision 1.26 2001/11/19 14:20:41 pkj
* Minor changes to comments and unused code.
*
* Revision 1.25 2001/11/12 20:03:43 pkj
* Fixed compiler warnings.
*
* Revision 1.24 2001/11/12 15:10:05 pkj
* Total redesign of the receiving part of the serial driver.
* Uses eight chained descriptors to write to a 4kB buffer.
* This data is then serialised into a 2kB buffer. From there it
* is copied into the TTY's flip buffers when they become available.
* A lot of copying, and the sizes of the buffers might need to be
* tweaked, but all in all it should work better than the previous
* version, without the need to modify the TTY code in any way.
* Also note that erroneous bytes are now correctly marked in the
* flag buffers (instead of always marking the first byte).
*
* Revision 1.23 2001/10/30 17:53:26 pkj
* * Set info->uses_dma to 0 when a port is closed.
* * Mark the timer1 interrupt as a fast one (SA_INTERRUPT).
* * Call start_flush_timer() in start_receive() if
* CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST is defined.
*
* Revision 1.22 2001/10/30 17:44:03 pkj
* Use %lu for received and transmitted counters in line_info().
*
* Revision 1.21 2001/10/30 17:40:34 pkj
* Clean-up. The only change to functionality is that
* CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS(=5) is used instead of
* MAX_FLUSH_TIME(=8).
*
* Revision 1.20 2001/10/30 15:24:49 johana
* Added char_time stuff from 2.0 driver.
*
* Revision 1.19 2001/10/30 15:23:03 johana
* Merged with 1.13.2 branch + fixed indentation
* and changed CONFIG_ETRAX100_XYS to CONFIG_ETRAX_XYZ
*
* Revision 1.18 2001/09/24 09:27:22 pkj
* Completed ext_baud_table[] in cflag_to_baud() and cflag_to_etrax_baud().
*
* Revision 1.17 2001/08/24 11:32:49 ronny
* More fixes for the CONFIG_ETRAX_SERIAL_PORT0 define.
*
* Revision 1.16 2001/08/24 07:56:22 ronny
* Added config ifdefs around ser0 irq requests.
*
* Revision 1.15 2001/08/16 09:10:31 bjarne
* serial.c - corrected the initialization of rs_table, the wrong defines
* where used.
* Corrected a test in timed_flush_handler.
* Changed configured to enabled.
* serial.h - Changed configured to enabled.
*
* Revision 1.14 2001/08/15 07:31:23 bjarne
* Introduced two new members to the e100_serial struct.
* configured - Will be set to 1 if the port has been configured in .config
* uses_dma - Should be set to 1 if the port uses DMA. Currently it is set
* to 1
* when a port is opened. This is used to limit the DMA interrupt
* routines to only manipulate DMA channels actually used by the
* serial driver.
*
* Revision 1.13.2.2 2001/10/17 13:57:13 starvik
* Receiver was broken by the break fixes
*
* Revision 1.13.2.1 2001/07/20 13:57:39 ronny
* Merge with new stuff from etrax100ser.c. Works but haven't checked stuff
* like break handling.
*
* Revision 1.13 2001/05/09 12:40:31 johana
* Use DMA_NBR and IRQ_NBR defines from dma.h and irq.h
*
* Revision 1.12 2001/04/19 12:23:07 bjornw
* CONFIG_RS485 -> CONFIG_ETRAX_RS485
*
* Revision 1.11 2001/04/05 14:29:48 markusl
* Updated according to review remarks i.e.
* -Use correct types in port structure to avoid compiler warnings
* -Try to use IO_* macros whenever possible
* -Open should never return -EBUSY
*
* Revision 1.10 2001/03/05 13:14:07 bjornw
* Another spelling fix
*
* Revision 1.9 2001/02/23 13:46:38 bjornw
* Spellling check
*
* Revision 1.8 2001/01/23 14:56:35 markusl
* Made use of ser1 optional
* Needed by USB
*
* Revision 1.7 2001/01/19 16:14:48 perf
* Added kernel options for serial ports 234.
* Changed option names from CONFIG_ETRAX100_XYZ to CONFIG_ETRAX_XYZ.
*
* Revision 1.6 2000/11/22 16:36:09 bjornw
* Please marketing by using the correct case when spelling Etrax.
*
* Revision 1.5 2000/11/21 16:43:37 bjornw
* Fixed so it compiles under CONFIG_SVINTO_SIM
*
* Revision 1.4 2000/11/15 17:34:12 bjornw
* Added a timeout timer for flushing input channels. The interrupt-based
* fast flush system should be easy to merge with this later (works the same
* way, only with an irq instead of a system timer_list)
*
* Revision 1.3 2000/11/13 17:19:57 bjornw
* * Incredibly, this almost complete rewrite of serial.c worked (at least
* for output) the first time.
*
* Items worth noticing:
*
* No Etrax100 port 1 workarounds (does only compile on 2.4 anyway now)
* RS485 is not ported (why can't it be done in userspace as on x86 ?)
* Statistics done through async_icount - if any more stats are needed,
* that's the place to put them or in an arch-dep version of it.
* timeout_interrupt and the other fast timeout stuff not ported yet
* There be dragons in this 3k+ line driver
*
* Revision 1.2 2000/11/10 16:50:28 bjornw
* First shot at a 2.4 port, does not compile totally yet
*
* Revision 1.1 2000/11/10 16:47:32 bjornw
* Added verbatim copy of rev 1.49 etrax100ser.c from elinux
*
* Revision 1.49 2000/10/30 15:47:14 tobiasa
* Changed version number.
*
* Revision 1.48 2000/10/25 11:02:43 johana
* Changed %ul to %lu in printf's
*
* Revision 1.47 2000/10/18 15:06:53 pkj
* Compile correctly with CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST and
* CONFIG_ETRAX_SERIAL_PROC_ENTRY together.
* Some clean-up of the /proc/serial file.
*
* Revision 1.46 2000/10/16 12:59:40 johana
* Added CONFIG_ETRAX_SERIAL_PROC_ENTRY for statistics and debug info.
*
* Revision 1.45 2000/10/13 17:10:59 pkj
* Do not flush DMAs while flipping TTY buffers.
*
* Revision 1.44 2000/10/13 16:34:29 pkj
* Added a delay in ser_interrupt() for 2.3ms when an error is detected.
* We do not know why this delay is required yet, but without it the
* irmaflash program does not work (this was the program that needed
* the ser_interrupt() to be needed in the first place). This should not
* affect normal use of the serial ports.
*
* Revision 1.43 2000/10/13 16:30:44 pkj
* New version of the fast flush of serial buffers code. This time
* it is localized to the serial driver and uses a fast timer to
* do the work.
*
* Revision 1.42 2000/10/13 14:54:26 bennyo
* Fix for switching RTS when using rs485
*
* Revision 1.41 2000/10/12 11:43:44 pkj
* Cleaned up a number of comments.
*
* Revision 1.40 2000/10/10 11:58:39 johana
* Made RS485 support generic for all ports.
* Toggle rts in interrupt if no delay wanted.
* WARNING: No true transmitter empty check??
* Set d_wait bit when sending data so interrupt is delayed until
* fifo flushed. (Fix tcdrain() problem)
*
* Revision 1.39 2000/10/04 16:08:02 bjornw
* * Use virt_to_phys etc. for DMA addresses
* * Removed CONFIG_FLUSH_DMA_FAST hacks
* * Indentation fix
*
* Revision 1.38 2000/10/02 12:27:10 mattias
* * added variable used when using fast flush on serial dma.
* (CONFIG_FLUSH_DMA_FAST)
*
* Revision 1.37 2000/09/27 09:44:24 pkj
* Uncomment definition of SERIAL_HANDLE_EARLY_ERRORS.
*
* Revision 1.36 2000/09/20 13:12:52 johana
* Support for CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS:
* Number of timer ticks between flush of receive fifo (1 tick = 10ms).
* Try 0-3 for low latency applications. Approx 5 for high load
* applications (e.g. PPP). Maybe this should be more adaptive some day...
*
* Revision 1.35 2000/09/20 10:36:08 johana
* Typo in get_lsr_info()
*
* Revision 1.34 2000/09/20 10:29:59 johana
* Let rs_chars_in_buffer() check fifo content as well.
* get_lsr_info() might work now (not tested).
* Easier to change the port to debug.
*
* Revision 1.33 2000/09/13 07:52:11 torbjore
* Support RS485
*
* Revision 1.32 2000/08/31 14:45:37 bjornw
* After sending a break we need to reset the transmit DMA channel
*
* Revision 1.31 2000/06/21 12:13:29 johana
* Fixed wait for all chars sent when closing port.
* (Used to always take 1 second!)
* Added shadows for directions of status/ctrl signals.
*
* Revision 1.30 2000/05/29 16:27:55 bjornw
* Simulator ifdef moved a bit
*
* Revision 1.29 2000/05/09 09:40:30 mattias
* * Added description of dma registers used in timeout_interrupt
* * Removed old code
*
* Revision 1.28 2000/05/08 16:38:58 mattias
* * Bugfix for flushing fifo in timeout_interrupt
* Problem occurs when bluetooth stack waits for a small number of bytes
* containing an event acknowledging free buffers in bluetooth HW
* As before, data was stuck in fifo until more data came on uart and
* flushed it up to the stack.
*
* Revision 1.27 2000/05/02 09:52:28 jonasd
* Added fix for peculiar etrax behaviour when eop is forced on an empty
* fifo. This is used when flashing the IRMA chip. Disabled by default.
*
* Revision 1.26 2000/03/29 15:32:02 bjornw
* 2.0.34 updates
*
* Revision 1.25 2000/02/16 16:59:36 bjornw
* * Receive DMA directly into the flip-buffer, eliminating an intermediary
* receive buffer and a memcpy. Will avoid some overruns.
* * Error message on debug port if an overrun or flip buffer overrun occurs.
* * Just use the first byte in the flag flip buffer for errors.
* * Check for timeout on the serial ports only each 5/100 s, not 1/100.
*
* Revision 1.24 2000/02/09 18:02:28 bjornw
* * Clear serial errors (overrun, framing, parity) correctly. Before, the
* receiver would get stuck if an error occurred and we did not restart
* the input DMA.
* * Cosmetics (indentation, some code made into inlines)
* * Some more debug options
* * Actually shut down the serial port (DMA irq, DMA reset, receiver stop)
* when the last open is closed. Corresponding fixes in startup().
* * rs_close() "tx FIFO wait" code moved into right place, bug & -> && fixed
* and make a special case out of port 1 (R_DMA_CHx_STATUS is broken for that)
* * e100_disable_rx/enable_rx just disables/enables the receiver, not RTS
*
* Revision 1.23 2000/01/24 17:46:19 johana
* Wait for flush of DMA/FIFO when closing port.
*
* Revision 1.22 2000/01/20 18:10:23 johana
* Added TIOCMGET ioctl to return modem status.
* Implemented modem status/control that works with the extra signals
* (DTR, DSR, RI,CD) as well.
* 3 different modes supported:
* ser0 on PB (Bundy), ser1 on PB (Lisa) and ser2 on PA (Bundy)
* Fixed DEF_TX value that caused the serial transmitter pin (txd) to go to 0 when
* closing the last filehandle, NASTY!.
* Added break generation, not tested though!
* Use IRQF_SHARED when request_irq() for ser2 and ser3 (shared with) par0 and par1.
* You can't use them at the same time (yet..), but you can hopefully switch
* between ser2/par0, ser3/par1 with the same kernel config.
* Replaced some magic constants with defines
*
*
*/
static char *serial_version = "$Revision: 1.25 $";
......@@ -446,6 +30,7 @@ static char *serial_version = "$Revision: 1.25 $";
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/dma.h>
#include <asm/system.h>
#include <linux/delay.h>
......@@ -454,8 +39,9 @@ static char *serial_version = "$Revision: 1.25 $";
/* 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
......@@ -504,18 +90,6 @@ struct tty_driver *serial_driver;
from eLinux */
#define SERIAL_HANDLE_EARLY_ERRORS
/* Defined and used in n_tty.c, but we need it here as well */
#define TTY_THRESHOLD_THROTTLE 128
/* Due to buffersizes and threshold values, our SERIAL_DESCR_BUF_SIZE
* must not be to high or flow control won't work if we leave it to the tty
* layer so we have our own throttling in flush_to_flip
* TTY_FLIPBUF_SIZE=512,
* TTY_THRESHOLD_THROTTLE/UNTHROTTLE=128
* BUF_SIZE can't be > 128
*/
#define CRIS_BUF_SIZE 512
/* Currently 16 descriptors x 128 bytes = 2048 bytes */
#define SERIAL_DESCR_BUF_SIZE 256
......@@ -588,13 +162,13 @@ unsigned long timer_data_to_ns(unsigned long timer_data);
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,
const unsigned char *buf, int count);
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);
static int get_lsr_info(struct e100_serial *info, unsigned int *value);
#define DEF_BAUD 115200 /* 115.2 kbit/s */
......@@ -679,20 +253,39 @@ static struct e100_serial rs_table[] = {
.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
......@@ -714,20 +307,42 @@ static struct e100_serial rs_table[] = {
.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
......@@ -748,20 +363,40 @@ static struct e100_serial rs_table[] = {
.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
......@@ -782,20 +417,40 @@ static struct e100_serial rs_table[] = {
.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
......@@ -1416,12 +1071,11 @@ e100_dtr(struct e100_serial *info, int set)
{
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
......@@ -1440,12 +1094,11 @@ e100_rts(struct e100_serial *info, int set)
{
#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
......@@ -1463,12 +1116,11 @@ e100_ri_out(struct e100_serial *info, int set)
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
}
......@@ -1481,12 +1133,11 @@ e100_cd_out(struct e100_serial *info, int set)
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
}
......@@ -1560,8 +1211,7 @@ static void e100_disable_txdma_channel(struct e100_serial *info)
/* 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)) ==
......@@ -1589,7 +1239,7 @@ static void e100_disable_txdma_channel(struct e100_serial *info)
}
}
*R_GEN_CONFIG = genconfig_shadow;
restore_flags(flags);
local_irq_restore(flags);
}
......@@ -1597,8 +1247,7 @@ static void e100_enable_txdma_channel(struct e100_serial *info)
{
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) {
......@@ -1615,7 +1264,7 @@ static void e100_enable_txdma_channel(struct e100_serial *info)
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)
......@@ -1625,8 +1274,7 @@ static void e100_disable_rxdma_channel(struct e100_serial *info)
/* 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)) {
......@@ -1653,7 +1301,7 @@ static void e100_disable_rxdma_channel(struct e100_serial *info)
}
}
*R_GEN_CONFIG = genconfig_shadow;
restore_flags(flags);
local_irq_restore(flags);
}
......@@ -1661,8 +1309,7 @@ static void e100_enable_rxdma_channel(struct e100_serial *info)
{
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);
......@@ -1678,7 +1325,7 @@ static void e100_enable_rxdma_channel(struct e100_serial *info)
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
......@@ -1785,7 +1432,7 @@ e100_enable_rs485(struct tty_struct *tty,struct rs485_control *r)
}
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;
......@@ -1798,7 +1445,7 @@ e100_write_rs485(struct tty_struct *tty, int from_user,
*/
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;
}
......@@ -1836,7 +1483,7 @@ rs_stop(struct tty_struct *tty)
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)));
......@@ -1848,7 +1495,7 @@ rs_stop(struct tty_struct *tty)
}
*((unsigned long *)&info->port[REG_XOFF]) = xoff;
restore_flags(flags);
local_irq_restore(flags);
}
}
......@@ -1860,7 +1507,7 @@ rs_start(struct tty_struct *tty)
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)));
......@@ -1875,7 +1522,7 @@ rs_start(struct tty_struct *tty)
info->xmit.head != info->xmit.tail && info->xmit.buf)
e100_enable_serial_tx_ready_irq(info);
restore_flags(flags);
local_irq_restore(flags);
}
}
......@@ -2055,8 +1702,7 @@ static int serial_fast_timer_expired = 0;
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)); \
......@@ -2070,7 +1716,7 @@ static void flush_timeout_function(unsigned long data);
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)
......@@ -2099,8 +1745,7 @@ append_recv_buffer(struct e100_serial *info, struct etrax_recv_buffer *buffer)
{
unsigned long flags;
save_flags(flags);
cli();
local_irq_save(flags);
if (!info->first_recv_buffer)
info->first_recv_buffer = buffer;
......@@ -2113,7 +1758,7 @@ append_recv_buffer(struct e100_serial *info, struct etrax_recv_buffer *buffer)
if (info->recv_cnt > info->max_recv_cnt)
info->max_recv_cnt = info->recv_cnt;
restore_flags(flags);
local_irq_restore(flags);
}
static int
......@@ -2133,11 +1778,7 @@ add_char_and_flag(struct e100_serial *info, unsigned char data, unsigned char fl
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++;
}
......@@ -2322,7 +1963,6 @@ start_receive(struct e100_serial *info)
*/
return;
#endif
info->tty->flip.count = 0;
if (info->uses_dma_in) {
/* reset the input dma channel to be sure it works */
......@@ -2484,32 +2124,20 @@ static void flush_to_flip_buffer(struct e100_serial *info)
{
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;
}
while ((buffer = info->first_recv_buffer) != NULL) {
unsigned int count = buffer->length;
count = tty_buffer_request_room(tty, count);
if (count == 0) /* Throttle ?? */
break;
if (count > 1)
tty_insert_flip_strings(tty, buffer->buffer, count - 1);
tty_insert_flip_char(tty, buffer->buffer[count-1], buffer->error);
tty_insert_flip_string(tty, buffer->buffer, count);
info->recv_cnt -= count;
if (count == buffer->length) {
......@@ -2525,18 +2153,9 @@ static void flush_to_flip_buffer(struct e100_serial *info)
if (!info->first_recv_buffer)
info->last_recv_buffer = NULL;
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 */
/* This includes a check for low-latency */
tty_flip_buffer_push(tty);
}
......@@ -2679,21 +2298,7 @@ struct e100_serial * handle_ser_rx_interrupt_no_dma(struct e100_serial *info)
printk("!NO TTY!\n");
return info;
}
if (tty->flip.count >= CRIS_BUF_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 >= CRIS_BUF_SIZE) {
DEBUG_LOG(info->line, "force FLIP! %i\n", tty->flip.count);
tty->flip.work.func((void *) tty);
if (tty->flip.count >= CRIS_BUF_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:
......@@ -2746,27 +2351,26 @@ struct e100_serial * handle_ser_rx_interrupt_no_dma(struct e100_serial *info)
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;
......@@ -2782,16 +2386,14 @@ struct e100_serial * handle_ser_rx_interrupt_no_dma(struct e100_serial *info)
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)) {
......@@ -2929,7 +2531,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
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));
......@@ -2938,7 +2540,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
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) {
......@@ -2946,7 +2548,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
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);
......@@ -2959,7 +2561,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
nop();
*info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, continue);
restore_flags(flags);
local_irq_restore(flags);
return;
}
/* Normal char-by-char interrupt */
......@@ -2973,7 +2575,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
}
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++;
......@@ -2997,7 +2599,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
/* 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,
......@@ -3022,7 +2624,7 @@ ser_interrupt(int irq, void *dev_id)
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;
......@@ -3067,7 +2669,7 @@ ser_interrupt(int irq, void *dev_id)
/* 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++) {
......@@ -3080,11 +2682,11 @@ ser_interrupt(int irq, void *dev_id)
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;
......@@ -3100,7 +2702,7 @@ ser_interrupt(int irq, void *dev_id)
}
}
restore_flags(flags);
local_irq_restore(flags);
return IRQ_RETVAL(handled);
} /* ser_interrupt */
#endif
......@@ -3121,11 +2723,13 @@ ser_interrupt(int irq, void *dev_id)
* 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;
......@@ -3145,13 +2749,12 @@ startup(struct e100_serial * info)
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;
}
......@@ -3277,7 +2880,7 @@ startup(struct e100_serial * info)
info->flags |= ASYNC_INITIALIZED;
restore_flags(flags);
local_irq_restore(flags);
return 0;
}
......@@ -3328,8 +2931,7 @@ shutdown(struct e100_serial * info)
info->irq);
#endif
save_flags(flags);
cli(); /* Disable interrupts */
local_irq_save(flags);
if (info->xmit.buf) {
free_page((unsigned long)info->xmit.buf);
......@@ -3353,7 +2955,7 @@ shutdown(struct e100_serial * info)
set_bit(TTY_IO_ERROR, &info->tty->flags);
info->flags &= ~ASYNC_INITIALIZED;
restore_flags(flags);
local_irq_restore(flags);
}
......@@ -3411,7 +3013,6 @@ change_speed(struct e100_serial *info)
DBAUD(printk("using external baudrate: %lu\n", CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8));
info->baud = CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8;
}
}
#endif
else
{
......@@ -3445,8 +3046,7 @@ change_speed(struct e100_serial *info)
#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) |
......@@ -3510,7 +3110,7 @@ change_speed(struct e100_serial *info)
}
*((unsigned long *)&info->port[REG_XOFF]) = xoff;
restore_flags(flags);
local_irq_restore(flags);
#endif /* !CONFIG_SVINTO_SIM */
update_char_time(info);
......@@ -3538,13 +3138,12 @@ rs_flush_chars(struct tty_struct *tty)
/* 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;
......@@ -3567,53 +3166,19 @@ static int rs_raw_write(struct tty_struct * tty, int from_user,
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
* 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.
/* 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,
......@@ -3631,8 +3196,7 @@ static int rs_raw_write(struct tty_struct * tty, int from_user,
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
......@@ -3651,7 +3215,7 @@ static int rs_raw_write(struct tty_struct * tty, int from_user,
} /* 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)
......@@ -3678,7 +3242,7 @@ rs_write(struct tty_struct * tty, int from_user,
}
#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)
......@@ -3746,10 +3310,9 @@ rs_flush_buffer(struct tty_struct *tty)
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);
}
......@@ -3767,7 +3330,7 @@ static void rs_send_xchar(struct tty_struct *tty, char ch)
{
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);
......@@ -3784,7 +3347,7 @@ static void rs_send_xchar(struct tty_struct *tty, char ch)
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);
}
/*
......@@ -3996,21 +3559,61 @@ char *get_control_state_str(int MLines, char *s)
}
#endif
static void
rs_break(struct tty_struct *tty, int break_state)
{
struct e100_serial *info = (struct e100_serial *)tty->driver_data;
unsigned long flags;
if (!info->port)
return;
local_irq_save(flags);
if (break_state == -1) {
/* Go to manual mode and set the txd pin to 0 */
/* Clear bit 7 (txd) and 6 (tr_enable) */
info->tx_ctrl &= 0x3F;
} else {
/* Set bit 7 (txd) and 6 (tr_enable) */
info->tx_ctrl |= (0x80 | 0x40);
}
info->port[REG_TR_CTRL] = info->tx_ctrl;
local_irq_restore(flags);
}
static int
get_modem_info(struct e100_serial * info, unsigned int *value)
rs_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{
unsigned int result;
/* Polarity isn't verified */
#if 0 /*def SERIAL_DEBUG_IO */
struct e100_serial *info = (struct e100_serial *)tty->driver_data;
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
if (clear & TIOCM_RTS)
e100_rts(info, 0);
if (clear & TIOCM_DTR)
e100_dtr(info, 0);
/* Handle FEMALE behaviour */
if (clear & TIOCM_RI)
e100_ri_out(info, 0);
if (clear & TIOCM_CD)
e100_cd_out(info, 0);
if (set & TIOCM_RTS)
e100_rts(info, 1);
if (set & TIOCM_DTR)
e100_dtr(info, 1);
/* Handle FEMALE behaviour */
if (set & TIOCM_RI)
e100_ri_out(info, 1);
if (set & TIOCM_CD)
e100_cd_out(info, 1);
return 0;
}
static int
rs_tiocmget(struct tty_struct *tty, struct file *file)
{
struct e100_serial *info = (struct e100_serial *)tty->driver_data;
unsigned int result;
result =
(!E100_RTS_GET(info) ? TIOCM_RTS : 0)
......@@ -4021,95 +3624,20 @@ get_modem_info(struct e100_serial * info, unsigned int *value)
| (!E100_CTS_GET(info) ? TIOCM_CTS : 0);
#ifdef SERIAL_DEBUG_IO
printk("e100ser: modem state: %i 0x%08X\n", result, result);
printk(KERN_DEBUG "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);
printk(KERN_DEBUG "state: %s\n", s);
}
#endif
if (copy_to_user(value, &result, sizeof(int)))
return -EFAULT;
return 0;
}
return result;
static int
set_modem_info(struct e100_serial * info, unsigned int cmd,
unsigned int *value)
{
unsigned int arg;
if (copy_from_user(&arg, value, sizeof(int)))
return -EFAULT;
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) {
e100_rts(info, 0);
}
if (arg & TIOCM_DTR) {
e100_dtr(info, 0);
}
/* Handle FEMALE behaviour */
if (arg & TIOCM_RI) {
e100_ri_out(info, 0);
}
if (arg & TIOCM_CD) {
e100_cd_out(info, 0);
}
break;
case TIOCMSET:
e100_rts(info, arg & TIOCM_RTS);
e100_dtr(info, arg & TIOCM_DTR);
/* Handle FEMALE behaviour */
e100_ri_out(info, arg & TIOCM_RI);
e100_cd_out(info, arg & TIOCM_CD);
break;
default:
return -EINVAL;
}
return 0;
}
static void
rs_break(struct tty_struct *tty, int break_state)
{
struct e100_serial * info = (struct e100_serial *)tty->driver_data;
unsigned long flags;
if (!info->port)
return;
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) */
}
info->port[REG_TR_CTRL] = info->tx_ctrl;
restore_flags(flags);
}
static int
rs_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
......@@ -4124,49 +3652,45 @@ rs_ioctl(struct tty_struct *tty, struct file * file,
}
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);
case TIOCSSERIAL:
return set_serial_info(info,
(struct serial_struct *) arg);
case TIOCSERGETLSR: /* Get line status register */
return get_lsr_info(info, (unsigned int *) arg);
case TIOCSERGSTRUCT:
if (copy_to_user((struct e100_serial *) arg,
info, sizeof(struct e100_serial)))
return -EFAULT;
return 0;
case TIOCGSERIAL:
return get_serial_info(info,
(struct serial_struct *) arg);
case TIOCSSERIAL:
return set_serial_info(info,
(struct serial_struct *) arg);
case TIOCSERGETLSR: /* Get line status register */
return get_lsr_info(info, (unsigned int *) arg);
case TIOCSERGSTRUCT:
if (copy_to_user((struct e100_serial *) arg,
info, sizeof(struct e100_serial)))
return -EFAULT;
return 0;
#if defined(CONFIG_ETRAX_RS485)
case TIOCSERSETRS485:
{
struct rs485_control rs485ctrl;
if (copy_from_user(&rs485ctrl, (struct rs485_control*)arg, sizeof(rs485ctrl)))
return -EFAULT;
case TIOCSERSETRS485:
{
struct rs485_control rs485ctrl;
if (copy_from_user(&rs485ctrl, (struct rs485_control *)arg,
sizeof(rs485ctrl)))
return -EFAULT;
return e100_enable_rs485(tty, &rs485ctrl);
}
return e100_enable_rs485(tty, &rs485ctrl);
}
case TIOCSERWRRS485:
{
struct rs485_write rs485wr;
if (copy_from_user(&rs485wr, (struct rs485_write*)arg, sizeof(rs485wr)))
return -EFAULT;
case TIOCSERWRRS485:
{
struct rs485_write rs485wr;
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
default:
return -ENOIOCTLCMD;
default:
return -ENOIOCTLCMD;
}
return 0;
}
......@@ -4191,46 +3715,6 @@ rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
}
/* 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()
......@@ -4252,11 +3736,10 @@ rs_close(struct tty_struct *tty, struct file * filp)
/* 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;
}
......@@ -4283,7 +3766,7 @@ rs_close(struct tty_struct *tty, struct file * filp)
info->count = 0;
}
if (info->count) {
restore_flags(flags);
local_irq_restore(flags);
return;
}
info->flags |= ASYNC_CLOSING;
......@@ -4337,7 +3820,7 @@ rs_close(struct tty_struct *tty, struct file * filp)
}
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&info->close_wait);
restore_flags(flags);
local_irq_restore(flags);
/* port closed */
......@@ -4359,6 +3842,28 @@ rs_close(struct tty_struct *tty, struct file * filp)
#endif
}
#endif
/*
* Release any allocated DMA irq's.
*/
if (info->dma_in_enabled) {
free_irq(info->dma_in_irq_nbr, info);
cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
info->uses_dma_in = 0;
#ifdef SERIAL_DEBUG_OPEN
printk(KERN_DEBUG "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(KERN_DEBUG "DMA irq '%s' freed\n",
info->dma_out_irq_description);
#endif
}
}
/*
......@@ -4433,8 +3938,8 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
*/
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,
!(info->flags & ASYNC_CLOSING));
#ifdef SERIAL_DO_RESTART
if (info->flags & ASYNC_HUP_NOTIFY)
return -EAGAIN;
......@@ -4472,21 +3977,19 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
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)) {
......@@ -4528,6 +4031,19 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
return 0;
}
static void
deinit_port(struct e100_serial *info)
{
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);
}
}
/*
* This routine is called whenever a serial port is opened.
* It performs the serial-specific initialization for the tty structure.
......@@ -4538,9 +4054,9 @@ rs_open(struct tty_struct *tty, struct file * filp)
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)
......@@ -4580,8 +4096,8 @@ rs_open(struct tty_struct *tty, struct file * filp)
*/
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,
!(info->flags & ASYNC_CLOSING));
#ifdef SERIAL_DO_RESTART
return ((info->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
......@@ -4590,13 +4106,86 @@ rs_open(struct tty_struct *tty, struct file * filp)
#endif
}
/*
* 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(KERN_DEBUG "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 out */
/* for the port again. */
info->dma_out_enabled = 0;
}
#ifdef SERIAL_DEBUG_OPEN
else
printk(KERN_DEBUG "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)
deinit_port(info);
/* FIXME Decrease count info->count here too? */
return retval;
}
retval = block_til_ready(tty, filp, info);
if (retval) {
......@@ -4604,6 +4193,9 @@ rs_open(struct tty_struct *tty, struct file * filp)
printk("rs_open returning after block_til_ready with %d\n",
retval);
#endif
if (allocated_resources)
deinit_port(info);
return retval;
}
......@@ -4793,6 +4385,8 @@ static const struct tty_operations rs_ops = {
.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
......@@ -4810,9 +4404,27 @@ rs_init(void)
/* Setup the timed flush handler system */
#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);
setup_timer(&flush_timer, timed_flush_handler, 0);
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 */
......@@ -4839,6 +4451,16 @@ rs_init(void)
/* 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;
......@@ -4872,7 +4494,7 @@ rs_init(void)
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",
......@@ -4890,64 +4512,17 @@ rs_init(void)
#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;
}
......
drivers/serial/crisv10.h 0 → 100644
View file @ 77accbf5
/*
* 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; /* Set to 1 if DMA should be used */
u8 dma_in_enabled; /* 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;
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
unsigned long char_time_usec; /* The time for 1 char, in usecs */
unsigned long flush_time_usec; /* How often we should flush */
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 */
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