* Networks technical support, or Peter Berger <pberger@brimson.com>,
* or Al Borchers <alborchers@steinerpoint.com>.
*
- * Version history:
- *
- * 2003_04_03 al borchers
- * - fixed a bug (that shows up with dosemu) where the tty struct is
- * used in a callback after it has been freed
- *
- * 2.3 2002_03_08 greg kroah-hartman
- * - fixed bug when multiple devices were attached at the same time.
- *
- * 2.2 2001_11_14 greg kroah-hartman
- * - fixed bug in edge_close that kept the port from being used more
- * than once.
- * - fixed memory leak on device removal.
- * - fixed potential double free of memory when command urb submitting
- * failed.
- * - other small cleanups when the device is removed
- *
- * 2.1 2001_07_09 greg kroah-hartman
- * - added support for TIOCMBIS and TIOCMBIC.
- *
- * (04/08/2001) gb
- * - Identify version on module load.
- *
- * 2.0 2001_03_05 greg kroah-hartman
- * - reworked entire driver to fit properly in with the other usb-serial
- * drivers. Occasional oopses still happen, but it's a good start.
- *
- * 1.2.3 (02/23/2001) greg kroah-hartman
- * - changed device table to work properly for 2.4.x final format.
- * - fixed problem with dropping data at high data rates.
- *
- * 1.2.2 (11/27/2000) greg kroah-hartman
- * - cleaned up more NTisms.
- * - Added device table for 2.4.0-test11
- *
- * 1.2.1 (11/08/2000) greg kroah-hartman
- * - Started to clean up NTisms.
- * - Fixed problem with dev field of urb for kernels >= 2.4.0-test9
- *
- * 1.2 (10/17/2000) David Iacovelli
- * Remove all EPIC code and GPL source
- * Fix RELEVANT_IFLAG macro to include flow control
- * changes port configuration changes.
- * Fix redefinition of SERIAL_MAGIC
- * Change all timeout values to 5 seconds
- * Tried to fix the UHCI multiple urb submission, but failed miserably.
- * it seems to work fine with OHCI.
- * ( Greg take a look at the #if 0 at end of WriteCmdUsb() we must
- * find a way to work arount this UHCI bug )
- *
- * 1.1 (10/11/2000) David Iacovelli
- * Fix XON/XOFF flow control to support both IXON and IXOFF
- *
- * 0.9.27 (06/30/2000) David Iacovelli
- * Added transmit queue and now allocate urb for command writes.
- *
- * 0.9.26 (06/29/2000) David Iacovelli
- * Add support for 80251 based edgeport
- *
- * 0.9.25 (06/27/2000) David Iacovelli
- * Do not close the port if it has multiple opens.
- *
- * 0.9.24 (05/26/2000) David Iacovelli
- * Add IOCTLs to support RXTX and JAVA POS
- * and first cut at running BlackBox Demo
- *
- * 0.9.23 (05/24/2000) David Iacovelli
- * Add IOCTLs to support RXTX and JAVA POS
- *
- * 0.9.22 (05/23/2000) David Iacovelli
- * fixed bug in enumeration. If epconfig turns on mapping by
- * path after a device is already plugged in, we now update
- * the mapping correctly
- *
- * 0.9.21 (05/16/2000) David Iacovelli
- * Added BlockUntilChaseResp() to also wait for txcredits
- * Updated the way we allocate and handle write URBs
- * Add debug code to dump buffers
- *
- * 0.9.20 (05/01/2000) David Iacovelli
- * change driver to use usb/tts/
- *
- * 0.9.19 (05/01/2000) David Iacovelli
- * Update code to compile if DEBUG is off
- *
- * 0.9.18 (04/28/2000) David Iacovelli
- * cleanup and test tty_register with devfs
- *
- * 0.9.17 (04/27/2000) greg kroah-hartman
- * changed tty_register around to be like the way it
- * was before, but now it works properly with devfs.
- *
- * 0.9.16 (04/26/2000) david iacovelli
- * Fixed bug in GetProductInfo()
- *
- * 0.9.15 (04/25/2000) david iacovelli
- * Updated enumeration
- *
- * 0.9.14 (04/24/2000) david iacovelli
- * Removed all config/status IOCTLS and
- * converted to using /proc/edgeport
- * still playing with devfs
- *
- * 0.9.13 (04/24/2000) david iacovelli
- * Removed configuration based on ttyUSB0
- * Added support for configuration using /prod/edgeport
- * first attempt at using devfs (not working yet!)
- * Added IOCTL to GetProductInfo()
- * Added support for custom baud rates
- * Add support for random port numbers
- *
- * 0.9.12 (04/18/2000) david iacovelli
- * added additional configuration IOCTLs
- * use ttyUSB0 for configuration
- *
- * 0.9.11 (04/17/2000) greg kroah-hartman
- * fixed module initialization race conditions.
- * made all urbs dynamically allocated.
- * made driver devfs compatible. now it only registers the tty device
- * when the device is actually plugged in.
- *
- * 0.9.10 (04/13/2000) greg kroah-hartman
- * added proc interface framework.
- *
- * 0.9.9 (04/13/2000) david iacovelli
- * added enumeration code and ioctls to configure the device
- *
- * 0.9.8 (04/12/2000) david iacovelli
- * Change interrupt read start when device is plugged in
- * and stop when device is removed
- * process interrupt reads when all ports are closed
- * (keep value of rxBytesAvail consistent with the edgeport)
- * set the USB_BULK_QUEUE flag so that we can shove a bunch
- * of urbs at once down the pipe
- *
- * 0.9.7 (04/10/2000) david iacovelli
- * start to add enumeration code.
- * generate serial number for epic devices
- * add support for kdb
- *
- * 0.9.6 (03/30/2000) david iacovelli
- * add IOCTL to get string, manufacture, and boot descriptors
- *
- * 0.9.5 (03/14/2000) greg kroah-hartman
- * more error checking added to SerialOpen to try to fix UHCI open problem
- *
- * 0.9.4 (03/09/2000) greg kroah-hartman
- * added more error checking to handle oops when data is hanging
- * around and tty is abruptly closed.
- *
- * 0.9.3 (03/09/2000) david iacovelli
- * Add epic support for xon/xoff chars
- * play with performance
- *
- * 0.9.2 (03/08/2000) greg kroah-hartman
- * changed most "info" calls to "dbg"
- * implemented flow control properly in the termios call
- *
- * 0.9.1 (03/08/2000) david iacovelli
- * added EPIC support
- * enabled bootloader update
- *
- * 0.9 (03/08/2000) greg kroah-hartman
- * Release to IO networks.
- * Integrated changes that David made
- * made getting urbs for writing SMP safe
- *
- * 0.8 (03/07/2000) greg kroah-hartman
- * Release to IO networks.
- * Fixed problems that were seen in code by David.
- * Now both Edgeport/4 and Edgeport/2 works properly.
- * Changed most of the functions to use port instead of serial.
- *
- * 0.7 (02/27/2000) greg kroah-hartman
- * Milestone 3 release.
- * Release to IO Networks
- * ioctl for waiting on line change implemented.
- * ioctl for getting statistics implemented.
- * multiport support working.
- * lsr and msr registers are now handled properly.
- * change break now hooked up and working.
- * support for all known Edgeport devices.
- *
- * 0.6 (02/22/2000) greg kroah-hartman
- * Release to IO networks.
- * CHASE is implemented correctly when port is closed.
- * SerialOpen now blocks correctly until port is fully opened.
- *
- * 0.5 (02/20/2000) greg kroah-hartman
- * Release to IO networks.
- * Known problems:
- * modem status register changes are not sent on to the user
- * CHASE is not implemented when the port is closed.
- *
- * 0.4 (02/16/2000) greg kroah-hartman
- * Second cut at the CeBit demo.
- * Doesn't leak memory on every write to the port
- * Still small leaks on startup.
- * Added support for Edgeport/2 and Edgeport/8
- *
- * 0.3 (02/15/2000) greg kroah-hartman
- * CeBit demo release.
- * Force the line settings to 4800, 8, 1, e for the demo.
- * Warning! This version leaks memory like crazy!
- *
- * 0.2 (01/30/2000) greg kroah-hartman
- * Milestone 1 release.
- * Device is found by USB subsystem, enumerated, fimware is downloaded
- * and the descriptors are printed to the debug log, config is set, and
- * green light starts to blink. Open port works, and data can be sent
- * and received at the default settings of the UART. Loopback connector
- * and debug log confirms this.
- *
- * 0.1 (01/23/2000) greg kroah-hartman
- * Initial release to help IO Networks try to set up their test system.
- * Edgeport4 is recognized, firmware is downloaded, config is set so
- * device blinks green light every 3 sec. Port is bound, but opening,
- * closing, and sending data do not work properly.
- *
*/
#include <linux/config.h>
#include <linux/spinlock.h>
#include <linux/serial.h>
#include <linux/ioctl.h>
+#include <linux/wait.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
#include "usb-serial.h"
// These assume a 3.6864MHz crystal, the standard /16, and
// MCR.7 = 0.
//
-static struct divisor_table_entry divisor_table[] = {
+static const struct divisor_table_entry divisor_table[] = {
{ 50, 4608},
{ 75, 3072},
{ 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
#include "io_tables.h" /* all of the devices that this driver supports */
static struct usb_driver io_driver = {
- .owner = THIS_MODULE,
.name = "io_edgeport",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table_combined,
+ .no_dynamic_id = 1,
};
/* function prototypes for all of our local functions */
/* clean up the transfer buffer */
- if (urb->transfer_buffer != NULL) {
- kfree(urb->transfer_buffer);
- }
+ kfree(urb->transfer_buffer);
/* Free the command urb */
usb_free_urb (urb);
/* we have completed the command */
edge_port->commandPending = FALSE;
- wake_up_interruptible(&edge_port->wait_command);
+ wake_up(&edge_port->wait_command);
}
struct usb_serial *serial;
struct edgeport_serial *edge_serial;
int response;
- int timeout;
dbg("%s - port %d", __FUNCTION__, port->number);
}
/* now wait for the port to be completely opened */
- timeout = OPEN_TIMEOUT;
- while (timeout && edge_port->openPending == TRUE) {
- timeout = interruptible_sleep_on_timeout (&edge_port->wait_open, timeout);
- }
+ wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT);
if (edge_port->open == FALSE) {
/* open timed out */
************************************************************************/
static void block_until_chase_response(struct edgeport_port *edge_port)
{
+ DEFINE_WAIT(wait);
__u16 lastCredits;
int timeout = 1*HZ;
- int wait = 10;
+ int loop = 10;
while (1) {
// Save Last credits
}
// Block the thread for a while
- interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout);
+ prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
+ schedule_timeout(timeout);
+ finish_wait(&edge_port->wait_chase, &wait);
if (lastCredits == edge_port->txCredits) {
// No activity.. count down.
- wait--;
- if (wait == 0) {
+ loop--;
+ if (loop == 0) {
edge_port->chaseResponsePending = FALSE;
dbg("%s - Chase TIMEOUT", __FUNCTION__);
return;
} else {
// Reset timout value back to 10 seconds
dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
- wait = 10;
+ loop = 10;
}
}
}
************************************************************************/
static void block_until_tx_empty (struct edgeport_port *edge_port)
{
+ DEFINE_WAIT(wait);
struct TxFifo *fifo = &edge_port->txfifo;
__u32 lastCount;
int timeout = HZ/10;
- int wait = 30;
+ int loop = 30;
while (1) {
// Save Last count
}
// Block the thread for a while
- interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout);
+ prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
+ schedule_timeout(timeout);
+ finish_wait(&edge_port->wait_chase, &wait);
dbg("%s wait", __FUNCTION__);
if (lastCount == fifo->count) {
// No activity.. count down.
- wait--;
- if (wait == 0) {
+ loop--;
+ if (loop == 0) {
dbg("%s - TIMEOUT", __FUNCTION__);
return;
}
} else {
// Reset timout value back to seconds
- wait = 30;
+ loop = 30;
}
}
}
if (edge_port->write_urb) {
/* if this urb had a transfer buffer already (old transfer) free it */
- if (edge_port->write_urb->transfer_buffer != NULL) {
- kfree(edge_port->write_urb->transfer_buffer);
- }
- usb_free_urb (edge_port->write_urb);
+ kfree(edge_port->write_urb->transfer_buffer);
+ usb_free_urb(edge_port->write_urb);
edge_port->write_urb = NULL;
}
- if (edge_port->txfifo.fifo) {
- kfree(edge_port->txfifo.fifo);
- edge_port->txfifo.fifo = NULL;
- }
+ kfree(edge_port->txfifo.fifo);
+ edge_port->txfifo.fifo = NULL;
dbg("%s exited", __FUNCTION__);
}
// get a pointer to the write_urb
urb = edge_port->write_urb;
- /* if this urb had a transfer buffer already (old transfer) free it */
- if (urb->transfer_buffer != NULL) {
- kfree(urb->transfer_buffer);
- urb->transfer_buffer = NULL;
- }
+ /* make sure transfer buffer is freed */
+ kfree(urb->transfer_buffer);
+ urb->transfer_buffer = NULL;
/* build the data header for the buffer and port that we are about to send out */
count = fifo->count;
tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
tmp.xmit_fifo_size = edge_port->maxTxCredits;
tmp.baud_base = 9600;
- #if HZ < 2185
tmp.close_delay = 5*HZ;
tmp.closing_wait = 30*HZ;
- #else
- tmp.close_delay = 2*HZ;
- tmp.closing_wait = 65534;
- #endif
// tmp.custom_divisor = state->custom_divisor;
// tmp.hub6 = state->hub6;
// tmp.io_type = state->io_type;
*****************************************************************************/
static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
{
+ DEFINE_WAIT(wait);
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
struct async_icount cnow;
struct async_icount cprev;
struct serial_icounter_struct icount;
-
dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
switch (cmd) {
dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
cprev = edge_port->icount;
while (1) {
- interruptible_sleep_on(&edge_port->delta_msr_wait);
+ prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
+ schedule();
+ finish_wait(&edge_port->delta_msr_wait, &wait);
/* see if a signal did it */
if (signal_pending(current))
return -ERESTARTSYS;
// We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
// like wait longer in block_until_chase_response, but for now we don't.
edge_port->chaseResponsePending = FALSE;
- wake_up_interruptible (&edge_port->wait_chase);
+ wake_up (&edge_port->wait_chase);
return;
case IOSP_EXT_STATUS_RX_CHECK_RSP:
/* we have completed the open */
edge_port->openPending = FALSE;
edge_port->open = TRUE;
- wake_up_interruptible(&edge_port->wait_open);
+ wake_up(&edge_port->wait_open);
return;
}
int cnt;
do {
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
- tty_flip_buffer_push(tty);
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
- dev_err(dev, "%s - dropping data, %d bytes lost\n",
- __FUNCTION__, length);
- return;
- }
+ cnt = tty_buffer_request_room(tty, length);
+ if (cnt < length) {
+ dev_err(dev, "%s - dropping data, %d bytes lost\n",
+ __FUNCTION__, length - cnt);
+ if(cnt == 0)
+ break;
}
- cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count);
- memcpy(tty->flip.char_buf_ptr, data, cnt);
- memset(tty->flip.flag_buf_ptr, 0, cnt);
- tty->flip.char_buf_ptr += cnt;
- tty->flip.flag_buf_ptr += cnt;
- tty->flip.count += cnt;
+ tty_insert_flip_string(tty, data, cnt);
data += cnt;
length -= cnt;
} while (length > 0);
// wait for command to finish
timeout = COMMAND_TIMEOUT;
#if 0
- while (timeout && edge_port->commandPending == TRUE) {
- timeout = interruptible_sleep_on_timeout (&edge_port->wait_command, timeout);
- }
+ wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE));
if (edge_port->commandPending == TRUE) {
/* command timed out */
dbg("%s - %d", __FUNCTION__, baudrate);
- for (i = 0; i < NUM_ENTRIES(divisor_table); i++) {
+ for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
if ( divisor_table[i].BaudRate == baudrate ) {
*divisor = divisor_table[i].Divisor;
return 0;
dev = serial->dev;
/* create our private serial structure */
- edge_serial = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL);
+ edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
if (edge_serial == NULL) {
dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
return -ENOMEM;
}
- memset (edge_serial, 0, sizeof(struct edgeport_serial));
spin_lock_init(&edge_serial->es_lock);
edge_serial->serial = serial;
usb_set_serial_data(serial, edge_serial);
MODULE_PARM_DESC(debug, "Debug enabled or not");
module_param(low_latency, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Low latency enabled or not");
+MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
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