![Anand Gadiyar](/assets/img/avatar_default.png)
Signed-off-by: Anand Gadiyar <gadiyar@ti.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
1002 lines
27 KiB
C
1002 lines
27 KiB
C
/*
|
|
* KLSI KL5KUSB105 chip RS232 converter driver
|
|
*
|
|
* Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* All information about the device was acquired using SniffUSB ans snoopUSB
|
|
* on Windows98.
|
|
* It was written out of frustration with the PalmConnect USB Serial adapter
|
|
* sold by Palm Inc.
|
|
* Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided
|
|
* information that was not already available.
|
|
*
|
|
* It seems that KLSI bought some silicon-design information from ScanLogic,
|
|
* whose SL11R processor is at the core of the KL5KUSB chipset from KLSI.
|
|
* KLSI has firmware available for their devices; it is probable that the
|
|
* firmware differs from that used by KLSI in their products. If you have an
|
|
* original KLSI device and can provide some information on it, I would be
|
|
* most interested in adding support for it here. If you have any information
|
|
* on the protocol used (or find errors in my reverse-engineered stuff), please
|
|
* let me know.
|
|
*
|
|
* The code was only tested with a PalmConnect USB adapter; if you
|
|
* are adventurous, try it with any KLSI-based device and let me know how it
|
|
* breaks so that I can fix it!
|
|
*/
|
|
|
|
/* TODO:
|
|
* check modem line signals
|
|
* implement handshaking or decide that we do not support it
|
|
*/
|
|
|
|
/* History:
|
|
* 0.3a - implemented pools of write URBs
|
|
* 0.3 - alpha version for public testing
|
|
* 0.2 - TIOCMGET works, so autopilot(1) can be used!
|
|
* 0.1 - can be used to do pilot-xfer -p /dev/ttyUSB0 -l
|
|
*
|
|
* The driver skeleton is mainly based on mct_u232.c and various other
|
|
* pieces of code shamelessly copied from the drivers/usb/serial/ directory.
|
|
*/
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/tty_driver.h>
|
|
#include <linux/tty_flip.h>
|
|
#include <linux/module.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/unaligned.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/serial.h>
|
|
#include "kl5kusb105.h"
|
|
|
|
static int debug;
|
|
|
|
/*
|
|
* Version Information
|
|
*/
|
|
#define DRIVER_VERSION "v0.3a"
|
|
#define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>"
|
|
#define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
|
|
|
|
|
|
/*
|
|
* Function prototypes
|
|
*/
|
|
static int klsi_105_startup(struct usb_serial *serial);
|
|
static void klsi_105_disconnect(struct usb_serial *serial);
|
|
static void klsi_105_release(struct usb_serial *serial);
|
|
static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port);
|
|
static void klsi_105_close(struct usb_serial_port *port);
|
|
static int klsi_105_write(struct tty_struct *tty,
|
|
struct usb_serial_port *port, const unsigned char *buf, int count);
|
|
static void klsi_105_write_bulk_callback(struct urb *urb);
|
|
static int klsi_105_chars_in_buffer(struct tty_struct *tty);
|
|
static int klsi_105_write_room(struct tty_struct *tty);
|
|
static void klsi_105_read_bulk_callback(struct urb *urb);
|
|
static void klsi_105_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct ktermios *old);
|
|
static void klsi_105_throttle(struct tty_struct *tty);
|
|
static void klsi_105_unthrottle(struct tty_struct *tty);
|
|
static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file);
|
|
static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear);
|
|
|
|
/*
|
|
* All of the device info needed for the KLSI converters.
|
|
*/
|
|
static struct usb_device_id id_table [] = {
|
|
{ USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
|
|
{ USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, id_table);
|
|
|
|
static struct usb_driver kl5kusb105d_driver = {
|
|
.name = "kl5kusb105d",
|
|
.probe = usb_serial_probe,
|
|
.disconnect = usb_serial_disconnect,
|
|
.id_table = id_table,
|
|
.no_dynamic_id = 1,
|
|
};
|
|
|
|
static struct usb_serial_driver kl5kusb105d_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "kl5kusb105d",
|
|
},
|
|
.description = "KL5KUSB105D / PalmConnect",
|
|
.usb_driver = &kl5kusb105d_driver,
|
|
.id_table = id_table,
|
|
.num_ports = 1,
|
|
.open = klsi_105_open,
|
|
.close = klsi_105_close,
|
|
.write = klsi_105_write,
|
|
.write_bulk_callback = klsi_105_write_bulk_callback,
|
|
.chars_in_buffer = klsi_105_chars_in_buffer,
|
|
.write_room = klsi_105_write_room,
|
|
.read_bulk_callback = klsi_105_read_bulk_callback,
|
|
.set_termios = klsi_105_set_termios,
|
|
/*.break_ctl = klsi_105_break_ctl,*/
|
|
.tiocmget = klsi_105_tiocmget,
|
|
.tiocmset = klsi_105_tiocmset,
|
|
.attach = klsi_105_startup,
|
|
.disconnect = klsi_105_disconnect,
|
|
.release = klsi_105_release,
|
|
.throttle = klsi_105_throttle,
|
|
.unthrottle = klsi_105_unthrottle,
|
|
};
|
|
|
|
struct klsi_105_port_settings {
|
|
__u8 pktlen; /* always 5, it seems */
|
|
__u8 baudrate;
|
|
__u8 databits;
|
|
__u8 unknown1;
|
|
__u8 unknown2;
|
|
} __attribute__ ((packed));
|
|
|
|
/* we implement a pool of NUM_URBS urbs per usb_serial */
|
|
#define NUM_URBS 1
|
|
#define URB_TRANSFER_BUFFER_SIZE 64
|
|
struct klsi_105_private {
|
|
struct klsi_105_port_settings cfg;
|
|
struct ktermios termios;
|
|
unsigned long line_state; /* modem line settings */
|
|
/* write pool */
|
|
struct urb *write_urb_pool[NUM_URBS];
|
|
spinlock_t lock;
|
|
unsigned long bytes_in;
|
|
unsigned long bytes_out;
|
|
};
|
|
|
|
|
|
/*
|
|
* Handle vendor specific USB requests
|
|
*/
|
|
|
|
|
|
#define KLSI_TIMEOUT 5000 /* default urb timeout */
|
|
|
|
static int klsi_105_chg_port_settings(struct usb_serial_port *port,
|
|
struct klsi_105_port_settings *settings)
|
|
{
|
|
int rc;
|
|
|
|
rc = usb_control_msg(port->serial->dev,
|
|
usb_sndctrlpipe(port->serial->dev, 0),
|
|
KL5KUSB105A_SIO_SET_DATA,
|
|
USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
|
|
0, /* value */
|
|
0, /* index */
|
|
settings,
|
|
sizeof(struct klsi_105_port_settings),
|
|
KLSI_TIMEOUT);
|
|
if (rc < 0)
|
|
dev_err(&port->dev,
|
|
"Change port settings failed (error = %d)\n", rc);
|
|
dev_info(&port->serial->dev->dev,
|
|
"%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n",
|
|
settings->pktlen, settings->baudrate, settings->databits,
|
|
settings->unknown1, settings->unknown2);
|
|
return rc;
|
|
} /* klsi_105_chg_port_settings */
|
|
|
|
/* translate a 16-bit status value from the device to linux's TIO bits */
|
|
static unsigned long klsi_105_status2linestate(const __u16 status)
|
|
{
|
|
unsigned long res = 0;
|
|
|
|
res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
|
|
| ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
|
|
;
|
|
|
|
return res;
|
|
}
|
|
/*
|
|
* Read line control via vendor command and return result through
|
|
* *line_state_p
|
|
*/
|
|
/* It seems that the status buffer has always only 2 bytes length */
|
|
#define KLSI_STATUSBUF_LEN 2
|
|
static int klsi_105_get_line_state(struct usb_serial_port *port,
|
|
unsigned long *line_state_p)
|
|
{
|
|
int rc;
|
|
__u8 status_buf[KLSI_STATUSBUF_LEN] = { -1, -1};
|
|
__u16 status;
|
|
|
|
dev_info(&port->serial->dev->dev, "sending SIO Poll request\n");
|
|
rc = usb_control_msg(port->serial->dev,
|
|
usb_rcvctrlpipe(port->serial->dev, 0),
|
|
KL5KUSB105A_SIO_POLL,
|
|
USB_TYPE_VENDOR | USB_DIR_IN,
|
|
0, /* value */
|
|
0, /* index */
|
|
status_buf, KLSI_STATUSBUF_LEN,
|
|
10000
|
|
);
|
|
if (rc < 0)
|
|
dev_err(&port->dev, "Reading line status failed (error = %d)\n",
|
|
rc);
|
|
else {
|
|
status = get_unaligned_le16(status_buf);
|
|
|
|
dev_info(&port->serial->dev->dev, "read status %x %x",
|
|
status_buf[0], status_buf[1]);
|
|
|
|
*line_state_p = klsi_105_status2linestate(status);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
|
|
/*
|
|
* Driver's tty interface functions
|
|
*/
|
|
|
|
static int klsi_105_startup(struct usb_serial *serial)
|
|
{
|
|
struct klsi_105_private *priv;
|
|
int i, j;
|
|
|
|
/* check if we support the product id (see keyspan.c)
|
|
* FIXME
|
|
*/
|
|
|
|
/* allocate the private data structure */
|
|
for (i = 0; i < serial->num_ports; i++) {
|
|
priv = kmalloc(sizeof(struct klsi_105_private),
|
|
GFP_KERNEL);
|
|
if (!priv) {
|
|
dbg("%skmalloc for klsi_105_private failed.", __func__);
|
|
i--;
|
|
goto err_cleanup;
|
|
}
|
|
/* set initial values for control structures */
|
|
priv->cfg.pktlen = 5;
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b9600;
|
|
priv->cfg.databits = kl5kusb105a_dtb_8;
|
|
priv->cfg.unknown1 = 0;
|
|
priv->cfg.unknown2 = 1;
|
|
|
|
priv->line_state = 0;
|
|
|
|
priv->bytes_in = 0;
|
|
priv->bytes_out = 0;
|
|
usb_set_serial_port_data(serial->port[i], priv);
|
|
|
|
spin_lock_init(&priv->lock);
|
|
for (j = 0; j < NUM_URBS; j++) {
|
|
struct urb *urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
|
|
priv->write_urb_pool[j] = urb;
|
|
if (urb == NULL) {
|
|
dev_err(&serial->dev->dev, "No more urbs???\n");
|
|
goto err_cleanup;
|
|
}
|
|
|
|
urb->transfer_buffer =
|
|
kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
|
|
if (!urb->transfer_buffer) {
|
|
dev_err(&serial->dev->dev,
|
|
"%s - out of memory for urb buffers.\n",
|
|
__func__);
|
|
goto err_cleanup;
|
|
}
|
|
}
|
|
|
|
/* priv->termios is left uninitalized until port opening */
|
|
init_waitqueue_head(&serial->port[i]->write_wait);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_cleanup:
|
|
for (; i >= 0; i--) {
|
|
priv = usb_get_serial_port_data(serial->port[i]);
|
|
for (j = 0; j < NUM_URBS; j++) {
|
|
if (priv->write_urb_pool[j]) {
|
|
kfree(priv->write_urb_pool[j]->transfer_buffer);
|
|
usb_free_urb(priv->write_urb_pool[j]);
|
|
}
|
|
}
|
|
usb_set_serial_port_data(serial->port[i], NULL);
|
|
}
|
|
return -ENOMEM;
|
|
} /* klsi_105_startup */
|
|
|
|
|
|
static void klsi_105_disconnect(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
|
|
dbg("%s", __func__);
|
|
|
|
/* stop reads and writes on all ports */
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
struct klsi_105_private *priv =
|
|
usb_get_serial_port_data(serial->port[i]);
|
|
|
|
if (priv) {
|
|
/* kill our write urb pool */
|
|
int j;
|
|
struct urb **write_urbs = priv->write_urb_pool;
|
|
|
|
for (j = 0; j < NUM_URBS; j++) {
|
|
if (write_urbs[j]) {
|
|
usb_kill_urb(write_urbs[j]);
|
|
usb_free_urb(write_urbs[j]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} /* klsi_105_disconnect */
|
|
|
|
|
|
static void klsi_105_release(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
|
|
dbg("%s", __func__);
|
|
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
struct klsi_105_private *priv =
|
|
usb_get_serial_port_data(serial->port[i]);
|
|
|
|
kfree(priv);
|
|
}
|
|
} /* klsi_105_release */
|
|
|
|
static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
int retval = 0;
|
|
int rc;
|
|
int i;
|
|
unsigned long line_state;
|
|
struct klsi_105_port_settings cfg;
|
|
unsigned long flags;
|
|
|
|
dbg("%s port %d", __func__, port->number);
|
|
|
|
/* Do a defined restart:
|
|
* Set up sane default baud rate and send the 'READ_ON'
|
|
* vendor command.
|
|
* FIXME: set modem line control (how?)
|
|
* Then read the modem line control and store values in
|
|
* priv->line_state.
|
|
*/
|
|
cfg.pktlen = 5;
|
|
cfg.baudrate = kl5kusb105a_sio_b9600;
|
|
cfg.databits = kl5kusb105a_dtb_8;
|
|
cfg.unknown1 = 0;
|
|
cfg.unknown2 = 1;
|
|
klsi_105_chg_port_settings(port, &cfg);
|
|
|
|
/* set up termios structure */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->termios.c_iflag = tty->termios->c_iflag;
|
|
priv->termios.c_oflag = tty->termios->c_oflag;
|
|
priv->termios.c_cflag = tty->termios->c_cflag;
|
|
priv->termios.c_lflag = tty->termios->c_lflag;
|
|
for (i = 0; i < NCCS; i++)
|
|
priv->termios.c_cc[i] = tty->termios->c_cc[i];
|
|
priv->cfg.pktlen = cfg.pktlen;
|
|
priv->cfg.baudrate = cfg.baudrate;
|
|
priv->cfg.databits = cfg.databits;
|
|
priv->cfg.unknown1 = cfg.unknown1;
|
|
priv->cfg.unknown2 = cfg.unknown2;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
/* READ_ON and urb submission */
|
|
usb_fill_bulk_urb(port->read_urb, port->serial->dev,
|
|
usb_rcvbulkpipe(port->serial->dev,
|
|
port->bulk_in_endpointAddress),
|
|
port->read_urb->transfer_buffer,
|
|
port->read_urb->transfer_buffer_length,
|
|
klsi_105_read_bulk_callback,
|
|
port);
|
|
|
|
rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
|
|
if (rc) {
|
|
dev_err(&port->dev, "%s - failed submitting read urb, "
|
|
"error %d\n", __func__, rc);
|
|
retval = rc;
|
|
goto exit;
|
|
}
|
|
|
|
rc = usb_control_msg(port->serial->dev,
|
|
usb_sndctrlpipe(port->serial->dev, 0),
|
|
KL5KUSB105A_SIO_CONFIGURE,
|
|
USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
|
|
KL5KUSB105A_SIO_CONFIGURE_READ_ON,
|
|
0, /* index */
|
|
NULL,
|
|
0,
|
|
KLSI_TIMEOUT);
|
|
if (rc < 0) {
|
|
dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
|
|
retval = rc;
|
|
} else
|
|
dbg("%s - enabled reading", __func__);
|
|
|
|
rc = klsi_105_get_line_state(port, &line_state);
|
|
if (rc >= 0) {
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->line_state = line_state;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
dbg("%s - read line state 0x%lx", __func__, line_state);
|
|
retval = 0;
|
|
} else
|
|
retval = rc;
|
|
|
|
exit:
|
|
return retval;
|
|
} /* klsi_105_open */
|
|
|
|
|
|
static void klsi_105_close(struct usb_serial_port *port)
|
|
{
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
int rc;
|
|
|
|
dbg("%s port %d", __func__, port->number);
|
|
|
|
mutex_lock(&port->serial->disc_mutex);
|
|
if (!port->serial->disconnected) {
|
|
/* send READ_OFF */
|
|
rc = usb_control_msg(port->serial->dev,
|
|
usb_sndctrlpipe(port->serial->dev, 0),
|
|
KL5KUSB105A_SIO_CONFIGURE,
|
|
USB_TYPE_VENDOR | USB_DIR_OUT,
|
|
KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
|
|
0, /* index */
|
|
NULL, 0,
|
|
KLSI_TIMEOUT);
|
|
if (rc < 0)
|
|
dev_err(&port->dev,
|
|
"Disabling read failed (error = %d)\n", rc);
|
|
}
|
|
mutex_unlock(&port->serial->disc_mutex);
|
|
|
|
/* shutdown our bulk reads and writes */
|
|
usb_kill_urb(port->write_urb);
|
|
usb_kill_urb(port->read_urb);
|
|
/* unlink our write pool */
|
|
/* FIXME */
|
|
/* wgg - do I need this? I think so. */
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
dev_info(&port->serial->dev->dev,
|
|
"port stats: %ld bytes in, %ld bytes out\n",
|
|
priv->bytes_in, priv->bytes_out);
|
|
} /* klsi_105_close */
|
|
|
|
|
|
/* We need to write a complete 64-byte data block and encode the
|
|
* number actually sent in the first double-byte, LSB-order. That
|
|
* leaves at most 62 bytes of payload.
|
|
*/
|
|
#define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
|
|
|
|
|
|
static int klsi_105_write(struct tty_struct *tty,
|
|
struct usb_serial_port *port, const unsigned char *buf, int count)
|
|
{
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
int result, size;
|
|
int bytes_sent = 0;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
while (count > 0) {
|
|
/* try to find a free urb (write 0 bytes if none) */
|
|
struct urb *urb = NULL;
|
|
unsigned long flags;
|
|
int i;
|
|
/* since the pool is per-port we might not need
|
|
the spin lock !? */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
for (i = 0; i < NUM_URBS; i++) {
|
|
if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
|
|
urb = priv->write_urb_pool[i];
|
|
dbg("%s - using pool URB %d", __func__, i);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
if (urb == NULL) {
|
|
dbg("%s - no more free urbs", __func__);
|
|
goto exit;
|
|
}
|
|
|
|
if (urb->transfer_buffer == NULL) {
|
|
urb->transfer_buffer =
|
|
kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
|
|
if (urb->transfer_buffer == NULL) {
|
|
dev_err(&port->dev,
|
|
"%s - no more kernel memory...\n",
|
|
__func__);
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
size = min(count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
|
|
size = min(size, URB_TRANSFER_BUFFER_SIZE -
|
|
KLSI_105_DATA_OFFSET);
|
|
|
|
memcpy(urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
|
|
|
|
/* write payload size into transfer buffer */
|
|
((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
|
|
((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
|
|
|
|
/* set up our urb */
|
|
usb_fill_bulk_urb(urb, port->serial->dev,
|
|
usb_sndbulkpipe(port->serial->dev,
|
|
port->bulk_out_endpointAddress),
|
|
urb->transfer_buffer,
|
|
URB_TRANSFER_BUFFER_SIZE,
|
|
klsi_105_write_bulk_callback,
|
|
port);
|
|
|
|
/* send the data out the bulk port */
|
|
result = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (result) {
|
|
dev_err(&port->dev,
|
|
"%s - failed submitting write urb, error %d\n",
|
|
__func__, result);
|
|
goto exit;
|
|
}
|
|
buf += size;
|
|
bytes_sent += size;
|
|
count -= size;
|
|
}
|
|
exit:
|
|
/* lockless, but it's for debug info only... */
|
|
priv->bytes_out += bytes_sent;
|
|
|
|
return bytes_sent; /* that's how much we wrote */
|
|
} /* klsi_105_write */
|
|
|
|
static void klsi_105_write_bulk_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
int status = urb->status;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
if (status) {
|
|
dbg("%s - nonzero write bulk status received: %d", __func__,
|
|
status);
|
|
return;
|
|
}
|
|
|
|
usb_serial_port_softint(port);
|
|
} /* klsi_105_write_bulk_completion_callback */
|
|
|
|
|
|
/* return number of characters currently in the writing process */
|
|
static int klsi_105_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int chars = 0;
|
|
int i;
|
|
unsigned long flags;
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
for (i = 0; i < NUM_URBS; ++i) {
|
|
if (priv->write_urb_pool[i]->status == -EINPROGRESS)
|
|
chars += URB_TRANSFER_BUFFER_SIZE;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
dbg("%s - returns %d", __func__, chars);
|
|
return chars;
|
|
}
|
|
|
|
static int klsi_105_write_room(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
unsigned long flags;
|
|
int i;
|
|
int room = 0;
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
for (i = 0; i < NUM_URBS; ++i) {
|
|
if (priv->write_urb_pool[i]->status != -EINPROGRESS)
|
|
room += URB_TRANSFER_BUFFER_SIZE;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
dbg("%s - returns %d", __func__, room);
|
|
return room;
|
|
}
|
|
|
|
|
|
|
|
static void klsi_105_read_bulk_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
struct tty_struct *tty;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
int rc;
|
|
int status = urb->status;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
/* The urb might have been killed. */
|
|
if (status) {
|
|
dbg("%s - nonzero read bulk status received: %d", __func__,
|
|
status);
|
|
return;
|
|
}
|
|
|
|
/* The data received is again preceded by a length double-byte in LSB-
|
|
* first order (see klsi_105_write() )
|
|
*/
|
|
if (urb->actual_length == 0) {
|
|
/* empty urbs seem to happen, we ignore them */
|
|
/* dbg("%s - emtpy URB", __func__); */
|
|
;
|
|
} else if (urb->actual_length <= 2) {
|
|
dbg("%s - size %d URB not understood", __func__,
|
|
urb->actual_length);
|
|
usb_serial_debug_data(debug, &port->dev, __func__,
|
|
urb->actual_length, data);
|
|
} else {
|
|
int bytes_sent = ((__u8 *) data)[0] +
|
|
((unsigned int) ((__u8 *) data)[1] << 8);
|
|
tty = tty_port_tty_get(&port->port);
|
|
/* we should immediately resubmit the URB, before attempting
|
|
* to pass the data on to the tty layer. But that needs locking
|
|
* against re-entry an then mixed-up data because of
|
|
* intermixed tty_flip_buffer_push()s
|
|
* FIXME
|
|
*/
|
|
usb_serial_debug_data(debug, &port->dev, __func__,
|
|
urb->actual_length, data);
|
|
|
|
if (bytes_sent + 2 > urb->actual_length) {
|
|
dbg("%s - trying to read more data than available"
|
|
" (%d vs. %d)", __func__,
|
|
bytes_sent+2, urb->actual_length);
|
|
/* cap at implied limit */
|
|
bytes_sent = urb->actual_length - 2;
|
|
}
|
|
|
|
tty_buffer_request_room(tty, bytes_sent);
|
|
tty_insert_flip_string(tty, data + 2, bytes_sent);
|
|
tty_flip_buffer_push(tty);
|
|
tty_kref_put(tty);
|
|
|
|
/* again lockless, but debug info only */
|
|
priv->bytes_in += bytes_sent;
|
|
}
|
|
/* Continue trying to always read */
|
|
usb_fill_bulk_urb(port->read_urb, port->serial->dev,
|
|
usb_rcvbulkpipe(port->serial->dev,
|
|
port->bulk_in_endpointAddress),
|
|
port->read_urb->transfer_buffer,
|
|
port->read_urb->transfer_buffer_length,
|
|
klsi_105_read_bulk_callback,
|
|
port);
|
|
rc = usb_submit_urb(port->read_urb, GFP_ATOMIC);
|
|
if (rc)
|
|
dev_err(&port->dev,
|
|
"%s - failed resubmitting read urb, error %d\n",
|
|
__func__, rc);
|
|
} /* klsi_105_read_bulk_callback */
|
|
|
|
|
|
static void klsi_105_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port,
|
|
struct ktermios *old_termios)
|
|
{
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
unsigned int iflag = tty->termios->c_iflag;
|
|
unsigned int old_iflag = old_termios->c_iflag;
|
|
unsigned int cflag = tty->termios->c_cflag;
|
|
unsigned int old_cflag = old_termios->c_cflag;
|
|
struct klsi_105_port_settings cfg;
|
|
unsigned long flags;
|
|
speed_t baud;
|
|
|
|
/* lock while we are modifying the settings */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
/*
|
|
* Update baud rate
|
|
*/
|
|
baud = tty_get_baud_rate(tty);
|
|
|
|
if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
|
|
/* reassert DTR and (maybe) RTS on transition from B0 */
|
|
if ((old_cflag & CBAUD) == B0) {
|
|
dbg("%s: baud was B0", __func__);
|
|
#if 0
|
|
priv->control_state |= TIOCM_DTR;
|
|
/* don't set RTS if using hardware flow control */
|
|
if (!(old_cflag & CRTSCTS))
|
|
priv->control_state |= TIOCM_RTS;
|
|
mct_u232_set_modem_ctrl(serial, priv->control_state);
|
|
#endif
|
|
}
|
|
}
|
|
switch (baud) {
|
|
case 0: /* handled below */
|
|
break;
|
|
case 1200:
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b1200;
|
|
break;
|
|
case 2400:
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b2400;
|
|
break;
|
|
case 4800:
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b4800;
|
|
break;
|
|
case 9600:
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b9600;
|
|
break;
|
|
case 19200:
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b19200;
|
|
break;
|
|
case 38400:
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b38400;
|
|
break;
|
|
case 57600:
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b57600;
|
|
break;
|
|
case 115200:
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b115200;
|
|
break;
|
|
default:
|
|
dbg("KLSI USB->Serial converter:"
|
|
" unsupported baudrate request, using default of 9600");
|
|
priv->cfg.baudrate = kl5kusb105a_sio_b9600;
|
|
baud = 9600;
|
|
break;
|
|
}
|
|
if ((cflag & CBAUD) == B0) {
|
|
dbg("%s: baud is B0", __func__);
|
|
/* Drop RTS and DTR */
|
|
/* maybe this should be simulated by sending read
|
|
* disable and read enable messages?
|
|
*/
|
|
;
|
|
#if 0
|
|
priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
|
|
mct_u232_set_modem_ctrl(serial, priv->control_state);
|
|
#endif
|
|
}
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
|
|
if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
|
|
/* set the number of data bits */
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
dbg("%s - 5 bits/byte not supported", __func__);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return ;
|
|
case CS6:
|
|
dbg("%s - 6 bits/byte not supported", __func__);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return ;
|
|
case CS7:
|
|
priv->cfg.databits = kl5kusb105a_dtb_7;
|
|
break;
|
|
case CS8:
|
|
priv->cfg.databits = kl5kusb105a_dtb_8;
|
|
break;
|
|
default:
|
|
dev_err(&port->dev,
|
|
"CSIZE was not CS5-CS8, using default of 8\n");
|
|
priv->cfg.databits = kl5kusb105a_dtb_8;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Update line control register (LCR)
|
|
*/
|
|
if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
|
|
|| (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
|
|
/* Not currently supported */
|
|
tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB);
|
|
#if 0
|
|
priv->last_lcr = 0;
|
|
|
|
/* set the parity */
|
|
if (cflag & PARENB)
|
|
priv->last_lcr |= (cflag & PARODD) ?
|
|
MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
|
|
else
|
|
priv->last_lcr |= MCT_U232_PARITY_NONE;
|
|
|
|
/* set the number of stop bits */
|
|
priv->last_lcr |= (cflag & CSTOPB) ?
|
|
MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
|
|
|
|
mct_u232_set_line_ctrl(serial, priv->last_lcr);
|
|
#endif
|
|
;
|
|
}
|
|
/*
|
|
* Set flow control: well, I do not really now how to handle DTR/RTS.
|
|
* Just do what we have seen with SniffUSB on Win98.
|
|
*/
|
|
if ((iflag & IXOFF) != (old_iflag & IXOFF)
|
|
|| (iflag & IXON) != (old_iflag & IXON)
|
|
|| (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
|
|
/* Not currently supported */
|
|
tty->termios->c_cflag &= ~CRTSCTS;
|
|
/* Drop DTR/RTS if no flow control otherwise assert */
|
|
#if 0
|
|
if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
|
|
priv->control_state |= TIOCM_DTR | TIOCM_RTS;
|
|
else
|
|
priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
|
|
mct_u232_set_modem_ctrl(serial, priv->control_state);
|
|
#endif
|
|
;
|
|
}
|
|
memcpy(&cfg, &priv->cfg, sizeof(cfg));
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
/* now commit changes to device */
|
|
klsi_105_chg_port_settings(port, &cfg);
|
|
} /* klsi_105_set_termios */
|
|
|
|
|
|
#if 0
|
|
static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct usb_serial *serial = port->serial;
|
|
struct mct_u232_private *priv =
|
|
(struct mct_u232_private *)port->private;
|
|
unsigned char lcr = priv->last_lcr;
|
|
|
|
dbg("%sstate=%d", __func__, break_state);
|
|
|
|
/* LOCKING */
|
|
if (break_state)
|
|
lcr |= MCT_U232_SET_BREAK;
|
|
|
|
mct_u232_set_line_ctrl(serial, lcr);
|
|
} /* mct_u232_break_ctl */
|
|
#endif
|
|
|
|
static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
int rc;
|
|
unsigned long line_state;
|
|
dbg("%s - request, just guessing", __func__);
|
|
|
|
rc = klsi_105_get_line_state(port, &line_state);
|
|
if (rc < 0) {
|
|
dev_err(&port->dev,
|
|
"Reading line control failed (error = %d)\n", rc);
|
|
/* better return value? EAGAIN? */
|
|
return rc;
|
|
}
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->line_state = line_state;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
dbg("%s - read line state 0x%lx", __func__, line_state);
|
|
return (int)line_state;
|
|
}
|
|
|
|
static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
int retval = -EINVAL;
|
|
|
|
dbg("%s", __func__);
|
|
|
|
/* if this ever gets implemented, it should be done something like this:
|
|
struct usb_serial *serial = port->serial;
|
|
struct klsi_105_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
int control;
|
|
|
|
spin_lock_irqsave (&priv->lock, flags);
|
|
if (set & TIOCM_RTS)
|
|
priv->control_state |= TIOCM_RTS;
|
|
if (set & TIOCM_DTR)
|
|
priv->control_state |= TIOCM_DTR;
|
|
if (clear & TIOCM_RTS)
|
|
priv->control_state &= ~TIOCM_RTS;
|
|
if (clear & TIOCM_DTR)
|
|
priv->control_state &= ~TIOCM_DTR;
|
|
control = priv->control_state;
|
|
spin_unlock_irqrestore (&priv->lock, flags);
|
|
retval = mct_u232_set_modem_ctrl(serial, control);
|
|
*/
|
|
return retval;
|
|
}
|
|
|
|
static void klsi_105_throttle(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
dbg("%s - port %d", __func__, port->number);
|
|
usb_kill_urb(port->read_urb);
|
|
}
|
|
|
|
static void klsi_105_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int result;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
port->read_urb->dev = port->serial->dev;
|
|
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
|
|
if (result)
|
|
dev_err(&port->dev,
|
|
"%s - failed submitting read urb, error %d\n",
|
|
__func__, result);
|
|
}
|
|
|
|
|
|
|
|
static int __init klsi_105_init(void)
|
|
{
|
|
int retval;
|
|
retval = usb_serial_register(&kl5kusb105d_device);
|
|
if (retval)
|
|
goto failed_usb_serial_register;
|
|
retval = usb_register(&kl5kusb105d_driver);
|
|
if (retval)
|
|
goto failed_usb_register;
|
|
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
|
|
DRIVER_DESC "\n");
|
|
return 0;
|
|
failed_usb_register:
|
|
usb_serial_deregister(&kl5kusb105d_device);
|
|
failed_usb_serial_register:
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void __exit klsi_105_exit(void)
|
|
{
|
|
usb_deregister(&kl5kusb105d_driver);
|
|
usb_serial_deregister(&kl5kusb105d_device);
|
|
}
|
|
|
|
|
|
module_init(klsi_105_init);
|
|
module_exit(klsi_105_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "enable extensive debugging messages");
|
|
|
|
/* vim: set sts=8 ts=8 sw=8: */
|