linux/drivers/usb/serial/option.c

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/*
USB Driver for GSM modems
Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
This driver is free software; you can redistribute it and/or modify
it under the terms of Version 2 of the GNU General Public License as
published by the Free Software Foundation.
Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
History: see the git log.
Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
This driver exists because the "normal" serial driver doesn't work too well
with GSM modems. Issues:
- data loss -- one single Receive URB is not nearly enough
- nonstandard flow (Option devices) and multiplex (Sierra) control
- controlling the baud rate doesn't make sense
This driver is named "option" because the most common device it's
used for is a PC-Card (with an internal OHCI-USB interface, behind
which the GSM interface sits), made by Option Inc.
Some of the "one port" devices actually exhibit multiple USB instances
on the USB bus. This is not a bug, these ports are used for different
device features.
*/
#define DRIVER_VERSION "v0.7.1"
#define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
#define DRIVER_DESC "USB Driver for GSM modems"
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
/* Function prototypes */
static int option_open(struct usb_serial_port *port, struct file *filp);
static void option_close(struct usb_serial_port *port, struct file *filp);
static int option_startup(struct usb_serial *serial);
static void option_shutdown(struct usb_serial *serial);
static void option_rx_throttle(struct usb_serial_port *port);
static void option_rx_unthrottle(struct usb_serial_port *port);
static int option_write_room(struct usb_serial_port *port);
static void option_instat_callback(struct urb *urb, struct pt_regs *regs);
static int option_write(struct usb_serial_port *port,
const unsigned char *buf, int count);
static int option_chars_in_buffer(struct usb_serial_port *port);
static int option_ioctl(struct usb_serial_port *port, struct file *file,
unsigned int cmd, unsigned long arg);
static void option_set_termios(struct usb_serial_port *port,
struct termios *old);
static void option_break_ctl(struct usb_serial_port *port, int break_state);
static int option_tiocmget(struct usb_serial_port *port, struct file *file);
static int option_tiocmset(struct usb_serial_port *port, struct file *file,
unsigned int set, unsigned int clear);
static int option_send_setup(struct usb_serial_port *port);
/* Vendor and product IDs */
#define OPTION_VENDOR_ID 0x0AF0
#define HUAWEI_VENDOR_ID 0x12D1
#define AUDIOVOX_VENDOR_ID 0x0F3D
#define SIERRAWIRELESS_VENDOR_ID 0x1199
#define NOVATELWIRELESS_VENDOR_ID 0x1410
#define OPTION_PRODUCT_OLD 0x5000
#define OPTION_PRODUCT_FUSION 0x6000
#define OPTION_PRODUCT_FUSION2 0x6300
#define OPTION_PRODUCT_COBRA 0x6500
#define OPTION_PRODUCT_COBRA2 0x6600
#define HUAWEI_PRODUCT_E600 0x1001
#define AUDIOVOX_PRODUCT_AIRCARD 0x0112
#define SIERRAWIRELESS_PRODUCT_MC8755 0x6802
#define NOVATELWIRELESS_PRODUCT_U740 0x1400
static struct usb_device_id option_ids[] = {
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_OLD) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION2) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA2) },
{ USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
{ USB_DEVICE(AUDIOVOX_VENDOR_ID, AUDIOVOX_PRODUCT_AIRCARD) },
{ USB_DEVICE(SIERRAWIRELESS_VENDOR_ID, SIERRAWIRELESS_PRODUCT_MC8755) },
{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID,NOVATELWIRELESS_PRODUCT_U740) },
{ } /* Terminating entry */
};
static struct usb_device_id option_ids1[] = {
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_OLD) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION2) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA2) },
{ USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
{ USB_DEVICE(AUDIOVOX_VENDOR_ID, AUDIOVOX_PRODUCT_AIRCARD) },
{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID,NOVATELWIRELESS_PRODUCT_U740) },
{ } /* Terminating entry */
};
static struct usb_device_id option_ids3[] = {
{ USB_DEVICE(SIERRAWIRELESS_VENDOR_ID, SIERRAWIRELESS_PRODUCT_MC8755) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, option_ids);
static struct usb_driver option_driver = {
.name = "option",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = option_ids,
.no_dynamic_id = 1,
};
/* The card has three separate interfaces, which the serial driver
* recognizes separately, thus num_port=1.
*/
static struct usb_serial_driver option_3port_device = {
.driver = {
.owner = THIS_MODULE,
.name = "option3",
},
.description = "GSM modem (3-port)",
.id_table = option_ids3,
.num_interrupt_in = NUM_DONT_CARE,
.num_bulk_in = NUM_DONT_CARE,
.num_bulk_out = NUM_DONT_CARE,
.num_ports = 3,
.open = option_open,
.close = option_close,
.write = option_write,
.write_room = option_write_room,
.chars_in_buffer = option_chars_in_buffer,
.throttle = option_rx_throttle,
.unthrottle = option_rx_unthrottle,
.ioctl = option_ioctl,
.set_termios = option_set_termios,
.break_ctl = option_break_ctl,
.tiocmget = option_tiocmget,
.tiocmset = option_tiocmset,
.attach = option_startup,
.shutdown = option_shutdown,
.read_int_callback = option_instat_callback,
};
static struct usb_serial_driver option_1port_device = {
.driver = {
.owner = THIS_MODULE,
.name = "option1",
},
.description = "GSM modem (1-port)",
.id_table = option_ids1,
.num_interrupt_in = NUM_DONT_CARE,
.num_bulk_in = NUM_DONT_CARE,
.num_bulk_out = NUM_DONT_CARE,
.num_ports = 1,
.open = option_open,
.close = option_close,
.write = option_write,
.write_room = option_write_room,
.chars_in_buffer = option_chars_in_buffer,
.throttle = option_rx_throttle,
.unthrottle = option_rx_unthrottle,
.ioctl = option_ioctl,
.set_termios = option_set_termios,
.break_ctl = option_break_ctl,
.tiocmget = option_tiocmget,
.tiocmset = option_tiocmset,
.attach = option_startup,
.shutdown = option_shutdown,
.read_int_callback = option_instat_callback,
};
#ifdef CONFIG_USB_DEBUG
static int debug;
#else
#define debug 0
#endif
/* per port private data */
#define N_IN_URB 4
#define N_OUT_URB 1
#define IN_BUFLEN 4096
#define OUT_BUFLEN 128
struct option_port_private {
/* Input endpoints and buffer for this port */
struct urb *in_urbs[N_IN_URB];
char in_buffer[N_IN_URB][IN_BUFLEN];
/* Output endpoints and buffer for this port */
struct urb *out_urbs[N_OUT_URB];
char out_buffer[N_OUT_URB][OUT_BUFLEN];
/* Settings for the port */
int rts_state; /* Handshaking pins (outputs) */
int dtr_state;
int cts_state; /* Handshaking pins (inputs) */
int dsr_state;
int dcd_state;
int ri_state;
unsigned long tx_start_time[N_OUT_URB];
};
/* Functions used by new usb-serial code. */
static int __init option_init(void)
{
int retval;
retval = usb_serial_register(&option_1port_device);
if (retval)
goto failed_1port_device_register;
retval = usb_serial_register(&option_3port_device);
if (retval)
goto failed_3port_device_register;
retval = usb_register(&option_driver);
if (retval)
goto failed_driver_register;
info(DRIVER_DESC ": " DRIVER_VERSION);
return 0;
failed_driver_register:
usb_serial_deregister (&option_3port_device);
failed_3port_device_register:
usb_serial_deregister (&option_1port_device);
failed_1port_device_register:
return retval;
}
static void __exit option_exit(void)
{
usb_deregister (&option_driver);
usb_serial_deregister (&option_3port_device);
usb_serial_deregister (&option_1port_device);
}
module_init(option_init);
module_exit(option_exit);
static void option_rx_throttle(struct usb_serial_port *port)
{
dbg("%s", __FUNCTION__);
}
static void option_rx_unthrottle(struct usb_serial_port *port)
{
dbg("%s", __FUNCTION__);
}
static void option_break_ctl(struct usb_serial_port *port, int break_state)
{
/* Unfortunately, I don't know how to send a break */
dbg("%s", __FUNCTION__);
}
static void option_set_termios(struct usb_serial_port *port,
struct termios *old_termios)
{
dbg("%s", __FUNCTION__);
option_send_setup(port);
}
static int option_tiocmget(struct usb_serial_port *port, struct file *file)
{
unsigned int value;
struct option_port_private *portdata;
portdata = usb_get_serial_port_data(port);
value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
((portdata->dtr_state) ? TIOCM_DTR : 0) |
((portdata->cts_state) ? TIOCM_CTS : 0) |
((portdata->dsr_state) ? TIOCM_DSR : 0) |
((portdata->dcd_state) ? TIOCM_CAR : 0) |
((portdata->ri_state) ? TIOCM_RNG : 0);
return value;
}
static int option_tiocmset(struct usb_serial_port *port, struct file *file,
unsigned int set, unsigned int clear)
{
struct option_port_private *portdata;
portdata = usb_get_serial_port_data(port);
if (set & TIOCM_RTS)
portdata->rts_state = 1;
if (set & TIOCM_DTR)
portdata->dtr_state = 1;
if (clear & TIOCM_RTS)
portdata->rts_state = 0;
if (clear & TIOCM_DTR)
portdata->dtr_state = 0;
return option_send_setup(port);
}
static int option_ioctl(struct usb_serial_port *port, struct file *file,
unsigned int cmd, unsigned long arg)
{
return -ENOIOCTLCMD;
}
/* Write */
static int option_write(struct usb_serial_port *port,
const unsigned char *buf, int count)
{
struct option_port_private *portdata;
int i;
int left, todo;
struct urb *this_urb = NULL; /* spurious */
int err;
portdata = usb_get_serial_port_data(port);
dbg("%s: write (%d chars)", __FUNCTION__, count);
i = 0;
left = count;
for (i=0; left > 0 && i < N_OUT_URB; i++) {
todo = left;
if (todo > OUT_BUFLEN)
todo = OUT_BUFLEN;
this_urb = portdata->out_urbs[i];
if (this_urb->status == -EINPROGRESS) {
if (time_before(jiffies,
portdata->tx_start_time[i] + 10 * HZ))
continue;
usb_unlink_urb(this_urb);
continue;
}
if (this_urb->status != 0)
dbg("usb_write %p failed (err=%d)",
this_urb, this_urb->status);
dbg("%s: endpoint %d buf %d", __FUNCTION__,
usb_pipeendpoint(this_urb->pipe), i);
/* send the data */
memcpy (this_urb->transfer_buffer, buf, todo);
this_urb->transfer_buffer_length = todo;
this_urb->dev = port->serial->dev;
err = usb_submit_urb(this_urb, GFP_ATOMIC);
if (err) {
dbg("usb_submit_urb %p (write bulk) failed "
"(%d, has %d)", this_urb,
err, this_urb->status);
continue;
}
portdata->tx_start_time[i] = jiffies;
buf += todo;
left -= todo;
}
count -= left;
dbg("%s: wrote (did %d)", __FUNCTION__, count);
return count;
}
static void option_indat_callback(struct urb *urb, struct pt_regs *regs)
{
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
int err;
int endpoint;
struct usb_serial_port *port;
struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
dbg("%s: %p", __FUNCTION__, urb);
endpoint = usb_pipeendpoint(urb->pipe);
port = (struct usb_serial_port *) urb->context;
if (urb->status) {
dbg("%s: nonzero status: %d on endpoint %02x.",
__FUNCTION__, urb->status, endpoint);
} else {
tty = port->tty;
if (urb->actual_length) {
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 04:54:13 +00:00
tty_buffer_request_room(tty, urb->actual_length);
tty_insert_flip_string(tty, data, urb->actual_length);
tty_flip_buffer_push(tty);
} else {
dbg("%s: empty read urb received", __FUNCTION__);
}
/* Resubmit urb so we continue receiving */
if (port->open_count && urb->status != -ESHUTDOWN) {
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err)
printk(KERN_ERR "%s: resubmit read urb failed. "
"(%d)", __FUNCTION__, err);
}
}
return;
}
static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
{
struct usb_serial_port *port;
dbg("%s", __FUNCTION__);
port = (struct usb_serial_port *) urb->context;
usb_serial_port_softint(port);
}
static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
{
int err;
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
struct option_port_private *portdata = usb_get_serial_port_data(port);
struct usb_serial *serial = port->serial;
dbg("%s", __FUNCTION__);
dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
if (urb->status == 0) {
struct usb_ctrlrequest *req_pkt =
(struct usb_ctrlrequest *)urb->transfer_buffer;
if (!req_pkt) {
dbg("%s: NULL req_pkt\n", __FUNCTION__);
return;
}
if ((req_pkt->bRequestType == 0xA1) &&
(req_pkt->bRequest == 0x20)) {
int old_dcd_state;
unsigned char signals = *((unsigned char *)
urb->transfer_buffer +
sizeof(struct usb_ctrlrequest));
dbg("%s: signal x%x", __FUNCTION__, signals);
old_dcd_state = portdata->dcd_state;
portdata->cts_state = 1;
portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
portdata->ri_state = ((signals & 0x08) ? 1 : 0);
if (port->tty && !C_CLOCAL(port->tty) &&
old_dcd_state && !portdata->dcd_state)
tty_hangup(port->tty);
} else {
dbg("%s: type %x req %x", __FUNCTION__,
req_pkt->bRequestType,req_pkt->bRequest);
}
} else
dbg("%s: error %d", __FUNCTION__, urb->status);
/* Resubmit urb so we continue receiving IRQ data */
if (urb->status != -ESHUTDOWN) {
urb->dev = serial->dev;
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err)
dbg("%s: resubmit intr urb failed. (%d)",
__FUNCTION__, err);
}
}
static int option_write_room(struct usb_serial_port *port)
{
struct option_port_private *portdata;
int i;
int data_len = 0;
struct urb *this_urb;
portdata = usb_get_serial_port_data(port);
for (i=0; i < N_OUT_URB; i++) {
this_urb = portdata->out_urbs[i];
if (this_urb && this_urb->status != -EINPROGRESS)
data_len += OUT_BUFLEN;
}
dbg("%s: %d", __FUNCTION__, data_len);
return data_len;
}
static int option_chars_in_buffer(struct usb_serial_port *port)
{
struct option_port_private *portdata;
int i;
int data_len = 0;
struct urb *this_urb;
portdata = usb_get_serial_port_data(port);
for (i=0; i < N_OUT_URB; i++) {
this_urb = portdata->out_urbs[i];
if (this_urb && this_urb->status == -EINPROGRESS)
data_len += this_urb->transfer_buffer_length;
}
dbg("%s: %d", __FUNCTION__, data_len);
return data_len;
}
static int option_open(struct usb_serial_port *port, struct file *filp)
{
struct option_port_private *portdata;
struct usb_serial *serial = port->serial;
int i, err;
struct urb *urb;
portdata = usb_get_serial_port_data(port);
dbg("%s", __FUNCTION__);
/* Set some sane defaults */
portdata->rts_state = 1;
portdata->dtr_state = 1;
/* Reset low level data toggle and start reading from endpoints */
for (i = 0; i < N_IN_URB; i++) {
urb = portdata->in_urbs[i];
if (! urb)
continue;
if (urb->dev != serial->dev) {
dbg("%s: dev %p != %p", __FUNCTION__,
urb->dev, serial->dev);
continue;
}
/*
* make sure endpoint data toggle is synchronized with the
* device
*/
usb_clear_halt(urb->dev, urb->pipe);
err = usb_submit_urb(urb, GFP_KERNEL);
if (err) {
dbg("%s: submit urb %d failed (%d) %d",
__FUNCTION__, i, err,
urb->transfer_buffer_length);
}
}
/* Reset low level data toggle on out endpoints */
for (i = 0; i < N_OUT_URB; i++) {
urb = portdata->out_urbs[i];
if (! urb)
continue;
urb->dev = serial->dev;
/* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
usb_pipeout(urb->pipe), 0); */
}
port->tty->low_latency = 1;
option_send_setup(port);
return (0);
}
static inline void stop_urb(struct urb *urb)
{
if (urb && urb->status == -EINPROGRESS)
usb_kill_urb(urb);
}
static void option_close(struct usb_serial_port *port, struct file *filp)
{
int i;
struct usb_serial *serial = port->serial;
struct option_port_private *portdata;
dbg("%s", __FUNCTION__);
portdata = usb_get_serial_port_data(port);
portdata->rts_state = 0;
portdata->dtr_state = 0;
if (serial->dev) {
option_send_setup(port);
/* Stop reading/writing urbs */
for (i = 0; i < N_IN_URB; i++)
stop_urb(portdata->in_urbs[i]);
for (i = 0; i < N_OUT_URB; i++)
stop_urb(portdata->out_urbs[i]);
}
port->tty = NULL;
}
/* Helper functions used by option_setup_urbs */
static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
int dir, void *ctx, char *buf, int len,
void (*callback)(struct urb *, struct pt_regs *regs))
{
struct urb *urb;
if (endpoint == -1)
return NULL; /* endpoint not needed */
urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
if (urb == NULL) {
dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
return NULL;
}
/* Fill URB using supplied data. */
usb_fill_bulk_urb(urb, serial->dev,
usb_sndbulkpipe(serial->dev, endpoint) | dir,
buf, len, callback, ctx);
return urb;
}
/* Setup urbs */
static void option_setup_urbs(struct usb_serial *serial)
{
int i,j;
struct usb_serial_port *port;
struct option_port_private *portdata;
dbg("%s", __FUNCTION__);
for (i = 0; i < serial->num_ports; i++) {
port = serial->port[i];
portdata = usb_get_serial_port_data(port);
/* Do indat endpoints first */
for (j = 0; j < N_IN_URB; ++j) {
portdata->in_urbs[j] = option_setup_urb (serial,
port->bulk_in_endpointAddress, USB_DIR_IN, port,
portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
}
/* outdat endpoints */
for (j = 0; j < N_OUT_URB; ++j) {
portdata->out_urbs[j] = option_setup_urb (serial,
port->bulk_out_endpointAddress, USB_DIR_OUT, port,
portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
}
}
}
static int option_send_setup(struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
struct option_port_private *portdata;
dbg("%s", __FUNCTION__);
portdata = usb_get_serial_port_data(port);
if (port->tty) {
int val = 0;
if (portdata->dtr_state)
val |= 0x01;
if (portdata->rts_state)
val |= 0x02;
return usb_control_msg(serial->dev,
usb_rcvctrlpipe(serial->dev, 0),
0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
}
return 0;
}
static int option_startup(struct usb_serial *serial)
{
int i, err;
struct usb_serial_port *port;
struct option_port_private *portdata;
dbg("%s", __FUNCTION__);
/* Now setup per port private data */
for (i = 0; i < serial->num_ports; i++) {
port = serial->port[i];
portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
if (!portdata) {
dbg("%s: kmalloc for option_port_private (%d) failed!.",
__FUNCTION__, i);
return (1);
}
usb_set_serial_port_data(port, portdata);
if (! port->interrupt_in_urb)
continue;
err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (err)
dbg("%s: submit irq_in urb failed %d",
__FUNCTION__, err);
}
option_setup_urbs(serial);
return (0);
}
static void option_shutdown(struct usb_serial *serial)
{
int i, j;
struct usb_serial_port *port;
struct option_port_private *portdata;
dbg("%s", __FUNCTION__);
/* Stop reading/writing urbs */
for (i = 0; i < serial->num_ports; ++i) {
port = serial->port[i];
portdata = usb_get_serial_port_data(port);
for (j = 0; j < N_IN_URB; j++)
stop_urb(portdata->in_urbs[j]);
for (j = 0; j < N_OUT_URB; j++)
stop_urb(portdata->out_urbs[j]);
}
/* Now free them */
for (i = 0; i < serial->num_ports; ++i) {
port = serial->port[i];
portdata = usb_get_serial_port_data(port);
for (j = 0; j < N_IN_URB; j++) {
if (portdata->in_urbs[j]) {
usb_free_urb(portdata->in_urbs[j]);
portdata->in_urbs[j] = NULL;
}
}
for (j = 0; j < N_OUT_URB; j++) {
if (portdata->out_urbs[j]) {
usb_free_urb(portdata->out_urbs[j]);
portdata->out_urbs[j] = NULL;
}
}
}
/* Now free per port private data */
for (i = 0; i < serial->num_ports; i++) {
port = serial->port[i];
kfree(usb_get_serial_port_data(port));
}
}
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");
#ifdef CONFIG_USB_DEBUG
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug messages");
#endif