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kernel_samsung_sm7125/drivers/isdn/gigaset/usb-gigaset.c

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/*
* USB driver for Gigaset 307x directly or using M105 Data.
*
* Copyright (c) 2001 by Stefan Eilers
* and Hansjoerg Lipp <hjlipp@web.de>.
*
* This driver was derived from the USB skeleton driver by
* Greg Kroah-Hartman <greg@kroah.com>
*
* =====================================================================
* 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.
* =====================================================================
*/
#include "gigaset.h"
#include <linux/usb.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
/* Version Information */
#define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
#define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
/* Module parameters */
static int startmode = SM_ISDN;
static int cidmode = 1;
module_param(startmode, int, S_IRUGO);
module_param(cidmode, int, S_IRUGO);
MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
MODULE_PARM_DESC(cidmode, "Call-ID mode");
#define GIGASET_MINORS 1
#define GIGASET_MINOR 8
#define GIGASET_MODULENAME "usb_gigaset"
#define GIGASET_DEVNAME "ttyGU"
#define IF_WRITEBUF 2000 /* arbitrary limit */
/* Values for the Gigaset M105 Data */
#define USB_M105_VENDOR_ID 0x0681
#define USB_M105_PRODUCT_ID 0x0009
/* table of devices that work with this driver */
static const struct usb_device_id gigaset_table[] = {
{ USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, gigaset_table);
/*
* Control requests (empty fields: 00)
*
* RT|RQ|VALUE|INDEX|LEN |DATA
* In:
* C1 08 01
* Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
* C1 0F ll ll
* Get device information/status (llll: 0x200 and 0x40 seen).
* Real size: I only saw MIN(llll,0x64).
* Contents: seems to be always the same...
* offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
* offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
* rest: ?
* Out:
* 41 11
* Initialize/reset device ?
* 41 00 xx 00
* ? (xx=00 or 01; 01 on start, 00 on close)
* 41 07 vv mm
* Set/clear flags vv=value, mm=mask (see RQ 08)
* 41 12 xx
* Used before the following configuration requests are issued
* (with xx=0x0f). I've seen other values<0xf, though.
* 41 01 xx xx
* Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
* 41 03 ps bb
* Set byte size and parity. p: 0x20=even,0x10=odd,0x00=no parity
* [ 0x30: m, 0x40: s ]
* [s: 0: 1 stop bit; 1: 1.5; 2: 2]
* bb: bits/byte (seen 7 and 8)
* 41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
* ??
* Initialization: 01, 40, 00, 00
* Open device: 00 40, 00, 00
* yy and zz seem to be equal, either 0x00 or 0x0a
* (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
* 41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
* Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
* xx is usually 0x00 but was 0x7e before starting data transfer
* in unimodem mode. So, this might be an array of characters that
* need special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
*
* Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
* flags per packet.
*/
/* functions called if a device of this driver is connected/disconnected */
static int gigaset_probe(struct usb_interface *interface,
const struct usb_device_id *id);
static void gigaset_disconnect(struct usb_interface *interface);
/* functions called before/after suspend */
static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
static int gigaset_resume(struct usb_interface *intf);
static int gigaset_pre_reset(struct usb_interface *intf);
static struct gigaset_driver *driver;
/* usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver gigaset_usb_driver = {
.name = GIGASET_MODULENAME,
.probe = gigaset_probe,
.disconnect = gigaset_disconnect,
.id_table = gigaset_table,
.suspend = gigaset_suspend,
.resume = gigaset_resume,
.reset_resume = gigaset_resume,
.pre_reset = gigaset_pre_reset,
.post_reset = gigaset_resume,
};
struct usb_cardstate {
struct usb_device *udev; /* usb device pointer */
struct usb_interface *interface; /* interface for this device */
int busy; /* bulk output in progress */
/* Output buffer */
unsigned char *bulk_out_buffer;
int bulk_out_size;
__u8 bulk_out_endpointAddr;
struct urb *bulk_out_urb;
/* Input buffer */
unsigned char *rcvbuf;
int rcvbuf_size;
struct urb *read_urb;
__u8 int_in_endpointAddr;
char bchars[6]; /* for request 0x19 */
};
static inline unsigned tiocm_to_gigaset(unsigned state)
{
return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
}
static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
unsigned new_state)
{
struct usb_device *udev = cs->hw.usb->udev;
unsigned mask, val;
int r;
mask = tiocm_to_gigaset(old_state ^ new_state);
val = tiocm_to_gigaset(new_state);
gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
(val & 0xff) | ((mask & 0xff) << 8), 0,
NULL, 0, 2000 /* timeout? */);
if (r < 0)
return r;
return 0;
}
/*
* Set M105 configuration value
* using undocumented device commands reverse engineered from USB traces
* of the Siemens Windows driver
*/
static int set_value(struct cardstate *cs, u8 req, u16 val)
{
struct usb_device *udev = cs->hw.usb->udev;
int r, r2;
gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
(unsigned)req, (unsigned)val);
r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
/* no idea what this does */
if (r < 0) {
dev_err(&udev->dev, "error %d on request 0x12\n", -r);
return r;
}
r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
val, 0, NULL, 0, 2000 /*?*/);
if (r < 0)
dev_err(&udev->dev, "error %d on request 0x%02x\n",
-r, (unsigned)req);
r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
if (r2 < 0)
dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
return r < 0 ? r : (r2 < 0 ? r2 : 0);
}
/*
* set the baud rate on the internal serial adapter
* using the undocumented parameter setting command
*/
static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
{
u16 val;
u32 rate;
cflag &= CBAUD;
switch (cflag) {
case B300: rate = 300; break;
case B600: rate = 600; break;
case B1200: rate = 1200; break;
case B2400: rate = 2400; break;
case B4800: rate = 4800; break;
case B9600: rate = 9600; break;
case B19200: rate = 19200; break;
case B38400: rate = 38400; break;
case B57600: rate = 57600; break;
case B115200: rate = 115200; break;
default:
rate = 9600;
dev_err(cs->dev, "unsupported baudrate request 0x%x,"
" using default of B9600\n", cflag);
}
val = 0x383fff / rate + 1;
return set_value(cs, 1, val);
}
/*
* set the line format on the internal serial adapter
* using the undocumented parameter setting command
*/
static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
{
u16 val = 0;
/* set the parity */
if (cflag & PARENB)
val |= (cflag & PARODD) ? 0x10 : 0x20;
/* set the number of data bits */
switch (cflag & CSIZE) {
case CS5:
val |= 5 << 8; break;
case CS6:
val |= 6 << 8; break;
case CS7:
val |= 7 << 8; break;
case CS8:
val |= 8 << 8; break;
default:
dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
val |= 8 << 8;
break;
}
/* set the number of stop bits */
if (cflag & CSTOPB) {
if ((cflag & CSIZE) == CS5)
val |= 1; /* 1.5 stop bits */
else
val |= 2; /* 2 stop bits */
}
return set_value(cs, 3, val);
}
/*============================================================================*/
static int gigaset_init_bchannel(struct bc_state *bcs)
{
/* nothing to do for M10x */
gigaset_bchannel_up(bcs);
return 0;
}
static int gigaset_close_bchannel(struct bc_state *bcs)
{
/* nothing to do for M10x */
gigaset_bchannel_down(bcs);
return 0;
}
static int write_modem(struct cardstate *cs);
static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
/* Write tasklet handler: Continue sending current skb, or send command, or
* start sending an skb from the send queue.
*/
static void gigaset_modem_fill(unsigned long data)
{
struct cardstate *cs = (struct cardstate *) data;
struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
struct cmdbuf_t *cb;
int again;
gig_dbg(DEBUG_OUTPUT, "modem_fill");
if (cs->hw.usb->busy) {
gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
return;
}
do {
again = 0;
if (!bcs->tx_skb) { /* no skb is being sent */
cb = cs->cmdbuf;
if (cb) { /* commands to send? */
gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
if (send_cb(cs, cb) < 0) {
gig_dbg(DEBUG_OUTPUT,
"modem_fill: send_cb failed");
again = 1; /* no callback will be
called! */
}
} else { /* skbs to send? */
bcs->tx_skb = skb_dequeue(&bcs->squeue);
if (bcs->tx_skb)
gig_dbg(DEBUG_INTR,
"Dequeued skb (Adr: %lx)!",
(unsigned long) bcs->tx_skb);
}
}
if (bcs->tx_skb) {
gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
if (write_modem(cs) < 0) {
gig_dbg(DEBUG_OUTPUT,
"modem_fill: write_modem failed");
again = 1; /* no callback will be called! */
}
}
} while (again);
}
/*
* Interrupt Input URB completion routine
*/
static void gigaset_read_int_callback(struct urb *urb)
{
struct cardstate *cs = urb->context;
struct inbuf_t *inbuf = cs->inbuf;
int status = urb->status;
int r;
unsigned numbytes;
unsigned char *src;
unsigned long flags;
if (!status) {
numbytes = urb->actual_length;
if (numbytes) {
src = cs->hw.usb->rcvbuf;
if (unlikely(*src))
dev_warn(cs->dev,
"%s: There was no leading 0, but 0x%02x!\n",
__func__, (unsigned) *src);
++src; /* skip leading 0x00 */
--numbytes;
if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
gigaset_schedule_event(inbuf->cs);
}
} else
gig_dbg(DEBUG_INTR, "Received zero block length");
} else {
/* The urb might have been killed. */
gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
__func__, status);
if (status == -ENOENT || status == -ESHUTDOWN)
/* killed or endpoint shutdown: don't resubmit */
return;
}
/* resubmit URB */
spin_lock_irqsave(&cs->lock, flags);
if (!cs->connected) {
spin_unlock_irqrestore(&cs->lock, flags);
pr_err("%s: disconnected\n", __func__);
return;
}
r = usb_submit_urb(urb, GFP_ATOMIC);
spin_unlock_irqrestore(&cs->lock, flags);
if (r)
dev_err(cs->dev, "error %d resubmitting URB\n", -r);
}
/* This callback routine is called when data was transmitted to the device. */
static void gigaset_write_bulk_callback(struct urb *urb)
{
struct cardstate *cs = urb->context;
int status = urb->status;
unsigned long flags;
switch (status) {
case 0: /* normal completion */
break;
case -ENOENT: /* killed */
gig_dbg(DEBUG_ANY, "%s: killed", __func__);
cs->hw.usb->busy = 0;
return;
default:
dev_err(cs->dev, "bulk transfer failed (status %d)\n",
-status);
/* That's all we can do. Communication problems
are handled by timeouts or network protocols. */
}
spin_lock_irqsave(&cs->lock, flags);
if (!cs->connected) {
pr_err("%s: disconnected\n", __func__);
} else {
cs->hw.usb->busy = 0;
tasklet_schedule(&cs->write_tasklet);
}
spin_unlock_irqrestore(&cs->lock, flags);
}
static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
{
struct cmdbuf_t *tcb;
unsigned long flags;
int count;
int status = -ENOENT;
struct usb_cardstate *ucs = cs->hw.usb;
do {
if (!cb->len) {
tcb = cb;
spin_lock_irqsave(&cs->cmdlock, flags);
cs->cmdbytes -= cs->curlen;
gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
cs->curlen, cs->cmdbytes);
cs->cmdbuf = cb = cb->next;
if (cb) {
cb->prev = NULL;
cs->curlen = cb->len;
} else {
cs->lastcmdbuf = NULL;
cs->curlen = 0;
}
spin_unlock_irqrestore(&cs->cmdlock, flags);
if (tcb->wake_tasklet)
tasklet_schedule(tcb->wake_tasklet);
kfree(tcb);
}
if (cb) {
count = min(cb->len, ucs->bulk_out_size);
gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
usb_sndbulkpipe(ucs->udev,
ucs->bulk_out_endpointAddr & 0x0f),
cb->buf + cb->offset, count,
gigaset_write_bulk_callback, cs);
cb->offset += count;
cb->len -= count;
ucs->busy = 1;
spin_lock_irqsave(&cs->lock, flags);
status = cs->connected ?
usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
-ENODEV;
spin_unlock_irqrestore(&cs->lock, flags);
if (status) {
ucs->busy = 0;
dev_err(cs->dev,
"could not submit urb (error %d)\n",
-status);
cb->len = 0; /* skip urb => remove cb+wakeup
in next loop cycle */
}
}
} while (cb && status); /* next command on error */
return status;
}
/* Send command to device. */
static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
int len, struct tasklet_struct *wake_tasklet)
{
struct cmdbuf_t *cb;
unsigned long flags;
gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
DEBUG_TRANSCMD : DEBUG_LOCKCMD,
"CMD Transmit", len, buf);
if (len <= 0)
return 0;
cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC);
if (!cb) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
return -ENOMEM;
}
memcpy(cb->buf, buf, len);
cb->len = len;
cb->offset = 0;
cb->next = NULL;
cb->wake_tasklet = wake_tasklet;
spin_lock_irqsave(&cs->cmdlock, flags);
cb->prev = cs->lastcmdbuf;
if (cs->lastcmdbuf)
cs->lastcmdbuf->next = cb;
else {
cs->cmdbuf = cb;
cs->curlen = len;
}
cs->cmdbytes += len;
cs->lastcmdbuf = cb;
spin_unlock_irqrestore(&cs->cmdlock, flags);
spin_lock_irqsave(&cs->lock, flags);
if (cs->connected)
tasklet_schedule(&cs->write_tasklet);
spin_unlock_irqrestore(&cs->lock, flags);
return len;
}
static int gigaset_write_room(struct cardstate *cs)
{
unsigned bytes;
bytes = cs->cmdbytes;
return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
}
static int gigaset_chars_in_buffer(struct cardstate *cs)
{
return cs->cmdbytes;
}
/*
* set the break characters on the internal serial adapter
* using undocumented device commands reverse engineered from USB traces
* of the Siemens Windows driver
*/
static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
{
struct usb_device *udev = cs->hw.usb->udev;
gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
memcpy(cs->hw.usb->bchars, buf, 6);
return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
0, 0, &buf, 6, 2000);
}
static int gigaset_freebcshw(struct bc_state *bcs)
{
/* unused */
return 1;
}
/* Initialize the b-channel structure */
static int gigaset_initbcshw(struct bc_state *bcs)
{
/* unused */
bcs->hw.usb = NULL;
return 1;
}
static void gigaset_reinitbcshw(struct bc_state *bcs)
{
/* nothing to do for M10x */
}
static void gigaset_freecshw(struct cardstate *cs)
{
tasklet_kill(&cs->write_tasklet);
kfree(cs->hw.usb);
}
static int gigaset_initcshw(struct cardstate *cs)
{
struct usb_cardstate *ucs;
cs->hw.usb = ucs =
kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
if (!ucs) {
pr_err("out of memory\n");
return 0;
}
ucs->bchars[0] = 0;
ucs->bchars[1] = 0;
ucs->bchars[2] = 0;
ucs->bchars[3] = 0;
ucs->bchars[4] = 0x11;
ucs->bchars[5] = 0x13;
ucs->bulk_out_buffer = NULL;
ucs->bulk_out_urb = NULL;
ucs->read_urb = NULL;
tasklet_init(&cs->write_tasklet,
gigaset_modem_fill, (unsigned long) cs);
return 1;
}
/* Send data from current skb to the device. */
static int write_modem(struct cardstate *cs)
{
int ret = 0;
int count;
struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
struct usb_cardstate *ucs = cs->hw.usb;
unsigned long flags;
gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
if (!bcs->tx_skb->len) {
dev_kfree_skb_any(bcs->tx_skb);
bcs->tx_skb = NULL;
return -EINVAL;
}
/* Copy data to bulk out buffer and transmit data */
count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
skb_pull(bcs->tx_skb, count);
ucs->busy = 1;
gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
spin_lock_irqsave(&cs->lock, flags);
if (cs->connected) {
usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
usb_sndbulkpipe(ucs->udev,
ucs->bulk_out_endpointAddr &
0x0f),
ucs->bulk_out_buffer, count,
gigaset_write_bulk_callback, cs);
ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
} else {
ret = -ENODEV;
}
spin_unlock_irqrestore(&cs->lock, flags);
if (ret) {
dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
ucs->busy = 0;
}
if (!bcs->tx_skb->len) {
/* skb sent completely */
gigaset_skb_sent(bcs, bcs->tx_skb);
gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
(unsigned long) bcs->tx_skb);
dev_kfree_skb_any(bcs->tx_skb);
bcs->tx_skb = NULL;
}
return ret;
}
static int gigaset_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
int retval;
struct usb_device *udev = interface_to_usbdev(interface);
struct usb_host_interface *hostif = interface->cur_altsetting;
struct cardstate *cs = NULL;
struct usb_cardstate *ucs = NULL;
struct usb_endpoint_descriptor *endpoint;
int buffer_size;
gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
/* See if the device offered us matches what we can accept */
if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
(le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
return -ENODEV;
}
if (hostif->desc.bInterfaceNumber != 0) {
gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
hostif->desc.bInterfaceNumber);
return -ENODEV;
}
if (hostif->desc.bAlternateSetting != 0) {
dev_notice(&udev->dev, "unsupported altsetting %d - skip",
hostif->desc.bAlternateSetting);
return -ENODEV;
}
if (hostif->desc.bInterfaceClass != 255) {
dev_notice(&udev->dev, "unsupported interface class %d - skip",
hostif->desc.bInterfaceClass);
return -ENODEV;
}
dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
/* allocate memory for our device state and intialize it */
cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
if (!cs)
return -ENODEV;
ucs = cs->hw.usb;
/* save off device structure ptrs for later use */
usb_get_dev(udev);
ucs->udev = udev;
ucs->interface = interface;
cs->dev = &interface->dev;
/* save address of controller structure */
usb_set_intfdata(interface, cs);
endpoint = &hostif->endpoint[0].desc;
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
ucs->bulk_out_size = buffer_size;
ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
if (!ucs->bulk_out_buffer) {
dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
retval = -ENOMEM;
goto error;
}
ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!ucs->bulk_out_urb) {
dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
retval = -ENOMEM;
goto error;
}
endpoint = &hostif->endpoint[1].desc;
ucs->busy = 0;
ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!ucs->read_urb) {
dev_err(cs->dev, "No free urbs available\n");
retval = -ENOMEM;
goto error;
}
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
ucs->rcvbuf_size = buffer_size;
ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
if (!ucs->rcvbuf) {
dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
retval = -ENOMEM;
goto error;
}
/* Fill the interrupt urb and send it to the core */
usb_fill_int_urb(ucs->read_urb, udev,
usb_rcvintpipe(udev,
endpoint->bEndpointAddress & 0x0f),
ucs->rcvbuf, buffer_size,
gigaset_read_int_callback,
cs, endpoint->bInterval);
retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
if (retval) {
dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
goto error;
}
/* tell common part that the device is ready */
if (startmode == SM_LOCKED)
cs->mstate = MS_LOCKED;
if (!gigaset_start(cs)) {
tasklet_kill(&cs->write_tasklet);
retval = -ENODEV;
goto error;
}
return 0;
error:
usb_kill_urb(ucs->read_urb);
kfree(ucs->bulk_out_buffer);
usb_free_urb(ucs->bulk_out_urb);
kfree(ucs->rcvbuf);
usb_free_urb(ucs->read_urb);
usb_set_intfdata(interface, NULL);
ucs->read_urb = ucs->bulk_out_urb = NULL;
ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
usb_put_dev(ucs->udev);
ucs->udev = NULL;
ucs->interface = NULL;
gigaset_freecs(cs);
return retval;
}
static void gigaset_disconnect(struct usb_interface *interface)
{
struct cardstate *cs;
struct usb_cardstate *ucs;
cs = usb_get_intfdata(interface);
ucs = cs->hw.usb;
dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
usb_kill_urb(ucs->read_urb);
gigaset_stop(cs);
usb_set_intfdata(interface, NULL);
tasklet_kill(&cs->write_tasklet);
usb_kill_urb(ucs->bulk_out_urb);
kfree(ucs->bulk_out_buffer);
usb_free_urb(ucs->bulk_out_urb);
kfree(ucs->rcvbuf);
usb_free_urb(ucs->read_urb);
ucs->read_urb = ucs->bulk_out_urb = NULL;
ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
usb_put_dev(ucs->udev);
ucs->interface = NULL;
ucs->udev = NULL;
cs->dev = NULL;
gigaset_freecs(cs);
}
/* gigaset_suspend
* This function is called before the USB connection is suspended or reset.
*/
static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
{
struct cardstate *cs = usb_get_intfdata(intf);
/* stop activity */
cs->connected = 0; /* prevent rescheduling */
usb_kill_urb(cs->hw.usb->read_urb);
tasklet_kill(&cs->write_tasklet);
usb_kill_urb(cs->hw.usb->bulk_out_urb);
gig_dbg(DEBUG_SUSPEND, "suspend complete");
return 0;
}
/* gigaset_resume
* This function is called after the USB connection has been resumed or reset.
*/
static int gigaset_resume(struct usb_interface *intf)
{
struct cardstate *cs = usb_get_intfdata(intf);
int rc;
/* resubmit interrupt URB */
cs->connected = 1;
rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
if (rc) {
dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
return rc;
}
gig_dbg(DEBUG_SUSPEND, "resume complete");
return 0;
}
/* gigaset_pre_reset
* This function is called before the USB connection is reset.
*/
static int gigaset_pre_reset(struct usb_interface *intf)
{
/* same as suspend */
return gigaset_suspend(intf, PMSG_ON);
}
static const struct gigaset_ops ops = {
gigaset_write_cmd,
gigaset_write_room,
gigaset_chars_in_buffer,
gigaset_brkchars,
gigaset_init_bchannel,
gigaset_close_bchannel,
gigaset_initbcshw,
gigaset_freebcshw,
gigaset_reinitbcshw,
gigaset_initcshw,
gigaset_freecshw,
gigaset_set_modem_ctrl,
gigaset_baud_rate,
gigaset_set_line_ctrl,
gigaset_m10x_send_skb,
gigaset_m10x_input,
};
/*
* This function is called while kernel-module is loaded
*/
static int __init usb_gigaset_init(void)
{
int result;
/* allocate memory for our driver state and intialize it */
driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
GIGASET_MODULENAME, GIGASET_DEVNAME,
&ops, THIS_MODULE);
if (driver == NULL)
goto error;
/* register this driver with the USB subsystem */
result = usb_register(&gigaset_usb_driver);
if (result < 0) {
pr_err("error %d registering USB driver\n", -result);
goto error;
}
pr_info(DRIVER_DESC "\n");
return 0;
error:
if (driver)
gigaset_freedriver(driver);
driver = NULL;
return -1;
}
/*
* This function is called while unloading the kernel-module
*/
static void __exit usb_gigaset_exit(void)
{
int i;
gigaset_blockdriver(driver); /* => probe will fail
* => no gigaset_start any more
*/
/* stop all connected devices */
for (i = 0; i < driver->minors; i++)
gigaset_shutdown(driver->cs + i);
/* from now on, no isdn callback should be possible */
/* deregister this driver with the USB subsystem */
usb_deregister(&gigaset_usb_driver);
/* this will call the disconnect-callback */
/* from now on, no disconnect/probe callback should be running */
gigaset_freedriver(driver);
driver = NULL;
}
module_init(usb_gigaset_init);
module_exit(usb_gigaset_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");