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OpenCloudOS-Kernel/drivers/usb/input/yealink.c

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/*
* drivers/usb/input/yealink.c
*
* Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Description:
* Driver for the USB-P1K voip usb phone.
* This device is produced by Yealink Network Technology Co Ltd
* but may be branded under several names:
* - Yealink usb-p1k
* - Tiptel 115
* - ...
*
* This driver is based on:
* - the usbb2k-api http://savannah.nongnu.org/projects/usbb2k-api/
* - information from http://memeteau.free.fr/usbb2k
* - the xpad-driver drivers/usb/input/xpad.c
*
* Thanks to:
* - Olivier Vandorpe, for providing the usbb2k-api.
* - Martin Diehl, for spotting my memory allocation bug.
*
* History:
* 20050527 henk First version, functional keyboard. Keyboard events
* will pop-up on the ../input/eventX bus.
* 20050531 henk Added led, LCD, dialtone and sysfs interface.
* 20050610 henk Cleanups, make it ready for public consumption.
* 20050630 henk Cleanups, fixes in response to comments.
* 20050701 henk sysfs write serialisation, fix potential unload races
* 20050801 henk Added ringtone, restructure USB
* 20050816 henk Merge 2.6.13-rc6
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/rwsem.h>
#include <linux/usb.h>
#include <linux/usb_input.h>
#include "map_to_7segment.h"
#include "yealink.h"
#define DRIVER_VERSION "yld-20051230"
#define DRIVER_AUTHOR "Henk Vergonet"
#define DRIVER_DESC "Yealink phone driver"
#define YEALINK_POLLING_FREQUENCY 10 /* in [Hz] */
struct yld_status {
u8 lcd[24];
u8 led;
u8 dialtone;
u8 ringtone;
u8 keynum;
} __attribute__ ((packed));
/*
* Register the LCD segment and icon map
*/
#define _LOC(k,l) { .a = (k), .m = (l) }
#define _SEG(t, a, am, b, bm, c, cm, d, dm, e, em, f, fm, g, gm) \
{ .type = (t), \
.u = { .s = { _LOC(a, am), _LOC(b, bm), _LOC(c, cm), \
_LOC(d, dm), _LOC(e, em), _LOC(g, gm), \
_LOC(f, fm) } } }
#define _PIC(t, h, hm, n) \
{ .type = (t), \
.u = { .p = { .name = (n), .a = (h), .m = (hm) } } }
static const struct lcd_segment_map {
char type;
union {
struct pictogram_map {
u8 a,m;
char name[10];
} p;
struct segment_map {
u8 a,m;
} s[7];
} u;
} lcdMap[] = {
#include "yealink.h"
};
struct yealink_dev {
struct input_dev *idev; /* input device */
struct usb_device *udev; /* usb device */
/* irq input channel */
struct yld_ctl_packet *irq_data;
dma_addr_t irq_dma;
struct urb *urb_irq;
/* control output channel */
struct yld_ctl_packet *ctl_data;
dma_addr_t ctl_dma;
struct usb_ctrlrequest *ctl_req;
dma_addr_t ctl_req_dma;
struct urb *urb_ctl;
char phys[64]; /* physical device path */
u8 lcdMap[ARRAY_SIZE(lcdMap)]; /* state of LCD, LED ... */
int key_code; /* last reported key */
int stat_ix;
union {
struct yld_status s;
u8 b[sizeof(struct yld_status)];
} master, copy;
};
/*******************************************************************************
* Yealink lcd interface
******************************************************************************/
/*
* Register a default 7 segment character set
*/
static SEG7_DEFAULT_MAP(map_seg7);
/* Display a char,
* char '\9' and '\n' are placeholders and do not overwrite the original text.
* A space will always hide an icon.
*/
static int setChar(struct yealink_dev *yld, int el, int chr)
{
int i, a, m, val;
if (el >= ARRAY_SIZE(lcdMap))
return -EINVAL;
if (chr == '\t' || chr == '\n')
return 0;
yld->lcdMap[el] = chr;
if (lcdMap[el].type == '.') {
a = lcdMap[el].u.p.a;
m = lcdMap[el].u.p.m;
if (chr != ' ')
yld->master.b[a] |= m;
else
yld->master.b[a] &= ~m;
return 0;
}
val = map_to_seg7(&map_seg7, chr);
for (i = 0; i < ARRAY_SIZE(lcdMap[0].u.s); i++) {
m = lcdMap[el].u.s[i].m;
if (m == 0)
continue;
a = lcdMap[el].u.s[i].a;
if (val & 1)
yld->master.b[a] |= m;
else
yld->master.b[a] &= ~m;
val = val >> 1;
}
return 0;
};
/*******************************************************************************
* Yealink key interface
******************************************************************************/
/* Map device buttons to internal key events.
*
* USB-P1K button layout:
*
* up
* IN OUT
* down
*
* pickup C hangup
* 1 2 3
* 4 5 6
* 7 8 9
* * 0 #
*
* The "up" and "down" keys, are symbolised by arrows on the button.
* The "pickup" and "hangup" keys are symbolised by a green and red phone
* on the button.
*/
static int map_p1k_to_key(int scancode)
{
switch(scancode) { /* phone key: */
case 0x23: return KEY_LEFT; /* IN */
case 0x33: return KEY_UP; /* up */
case 0x04: return KEY_RIGHT; /* OUT */
case 0x24: return KEY_DOWN; /* down */
case 0x03: return KEY_ENTER; /* pickup */
case 0x14: return KEY_BACKSPACE; /* C */
case 0x13: return KEY_ESC; /* hangup */
case 0x00: return KEY_1; /* 1 */
case 0x01: return KEY_2; /* 2 */
case 0x02: return KEY_3; /* 3 */
case 0x10: return KEY_4; /* 4 */
case 0x11: return KEY_5; /* 5 */
case 0x12: return KEY_6; /* 6 */
case 0x20: return KEY_7; /* 7 */
case 0x21: return KEY_8; /* 8 */
case 0x22: return KEY_9; /* 9 */
case 0x30: return KEY_KPASTERISK; /* * */
case 0x31: return KEY_0; /* 0 */
case 0x32: return KEY_LEFTSHIFT |
KEY_3 << 8; /* # */
}
return -EINVAL;
}
/* Completes a request by converting the data into events for the
* input subsystem.
*
* The key parameter can be cascaded: key2 << 8 | key1
*/
static void report_key(struct yealink_dev *yld, int key, struct pt_regs *regs)
{
struct input_dev *idev = yld->idev;
input_regs(idev, regs);
if (yld->key_code >= 0) {
/* old key up */
input_report_key(idev, yld->key_code & 0xff, 0);
if (yld->key_code >> 8)
input_report_key(idev, yld->key_code >> 8, 0);
}
yld->key_code = key;
if (key >= 0) {
/* new valid key */
input_report_key(idev, key & 0xff, 1);
if (key >> 8)
input_report_key(idev, key >> 8, 1);
}
input_sync(idev);
}
/*******************************************************************************
* Yealink usb communication interface
******************************************************************************/
static int yealink_cmd(struct yealink_dev *yld, struct yld_ctl_packet *p)
{
u8 *buf = (u8 *)p;
int i;
u8 sum = 0;
for(i=0; i<USB_PKT_LEN-1; i++)
sum -= buf[i];
p->sum = sum;
return usb_control_msg(yld->udev,
usb_sndctrlpipe(yld->udev, 0),
USB_REQ_SET_CONFIGURATION,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
0x200, 3,
p, sizeof(*p),
USB_CTRL_SET_TIMEOUT);
}
static u8 default_ringtone[] = {
0xEF, /* volume [0-255] */
0xFB, 0x1E, 0x00, 0x0C, /* 1250 [hz], 12/100 [s] */
0xFC, 0x18, 0x00, 0x0C, /* 1000 [hz], 12/100 [s] */
0xFB, 0x1E, 0x00, 0x0C,
0xFC, 0x18, 0x00, 0x0C,
0xFB, 0x1E, 0x00, 0x0C,
0xFC, 0x18, 0x00, 0x0C,
0xFB, 0x1E, 0x00, 0x0C,
0xFC, 0x18, 0x00, 0x0C,
0xFF, 0xFF, 0x01, 0x90, /* silent, 400/100 [s] */
0x00, 0x00 /* end of sequence */
};
static int yealink_set_ringtone(struct yealink_dev *yld, u8 *buf, size_t size)
{
struct yld_ctl_packet *p = yld->ctl_data;
int ix, len;
if (size <= 0)
return -EINVAL;
/* Set the ringtone volume */
memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
yld->ctl_data->cmd = CMD_RING_VOLUME;
yld->ctl_data->size = 1;
yld->ctl_data->data[0] = buf[0];
yealink_cmd(yld, p);
buf++;
size--;
p->cmd = CMD_RING_NOTE;
ix = 0;
while (size != ix) {
len = size - ix;
if (len > sizeof(p->data))
len = sizeof(p->data);
p->size = len;
p->offset = cpu_to_be16(ix);
memcpy(p->data, &buf[ix], len);
yealink_cmd(yld, p);
ix += len;
}
return 0;
}
/* keep stat_master & stat_copy in sync.
*/
static int yealink_do_idle_tasks(struct yealink_dev *yld)
{
u8 val;
int i, ix, len;
ix = yld->stat_ix;
memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
yld->ctl_data->cmd = CMD_KEYPRESS;
yld->ctl_data->size = 1;
yld->ctl_data->sum = 0xff - CMD_KEYPRESS;
/* If state update pointer wraps do a KEYPRESS first. */
if (ix >= sizeof(yld->master)) {
yld->stat_ix = 0;
return 0;
}
/* find update candidates: copy != master */
do {
val = yld->master.b[ix];
if (val != yld->copy.b[ix])
goto send_update;
} while (++ix < sizeof(yld->master));
/* nothing todo, wait a bit and poll for a KEYPRESS */
yld->stat_ix = 0;
/* TODO how can we wait abit. ??
* msleep_interruptible(1000 / YEALINK_POLLING_FREQUENCY);
*/
return 0;
send_update:
/* Setup an appropriate update request */
yld->copy.b[ix] = val;
yld->ctl_data->data[0] = val;
switch(ix) {
case offsetof(struct yld_status, led):
yld->ctl_data->cmd = CMD_LED;
yld->ctl_data->sum = -1 - CMD_LED - val;
break;
case offsetof(struct yld_status, dialtone):
yld->ctl_data->cmd = CMD_DIALTONE;
yld->ctl_data->sum = -1 - CMD_DIALTONE - val;
break;
case offsetof(struct yld_status, ringtone):
yld->ctl_data->cmd = CMD_RINGTONE;
yld->ctl_data->sum = -1 - CMD_RINGTONE - val;
break;
case offsetof(struct yld_status, keynum):
val--;
val &= 0x1f;
yld->ctl_data->cmd = CMD_SCANCODE;
yld->ctl_data->offset = cpu_to_be16(val);
yld->ctl_data->data[0] = 0;
yld->ctl_data->sum = -1 - CMD_SCANCODE - val;
break;
default:
len = sizeof(yld->master.s.lcd) - ix;
if (len > sizeof(yld->ctl_data->data))
len = sizeof(yld->ctl_data->data);
/* Combine up to <len> consecutive LCD bytes in a singe request
*/
yld->ctl_data->cmd = CMD_LCD;
yld->ctl_data->offset = cpu_to_be16(ix);
yld->ctl_data->size = len;
yld->ctl_data->sum = -CMD_LCD - ix - val - len;
for(i=1; i<len; i++) {
ix++;
val = yld->master.b[ix];
yld->copy.b[ix] = val;
yld->ctl_data->data[i] = val;
yld->ctl_data->sum -= val;
}
}
yld->stat_ix = ix + 1;
return 1;
}
/* Decide on how to handle responses
*
* The state transition diagram is somethhing like:
*
* syncState<--+
* | |
* | idle
* \|/ |
* init --ok--> waitForKey --ok--> getKey
* ^ ^ |
* | +-------ok-------+
* error,start
*
*/
static void urb_irq_callback(struct urb *urb, struct pt_regs *regs)
{
struct yealink_dev *yld = urb->context;
int ret;
if (urb->status)
err("%s - urb status %d", __FUNCTION__, urb->status);
switch (yld->irq_data->cmd) {
case CMD_KEYPRESS:
yld->master.s.keynum = yld->irq_data->data[0];
break;
case CMD_SCANCODE:
dbg("get scancode %x", yld->irq_data->data[0]);
report_key(yld, map_p1k_to_key(yld->irq_data->data[0]), regs);
break;
default:
err("unexpected response %x", yld->irq_data->cmd);
}
yealink_do_idle_tasks(yld);
ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
if (ret)
err("%s - usb_submit_urb failed %d", __FUNCTION__, ret);
}
static void urb_ctl_callback(struct urb *urb, struct pt_regs *regs)
{
struct yealink_dev *yld = urb->context;
int ret;
if (urb->status)
err("%s - urb status %d", __FUNCTION__, urb->status);
switch (yld->ctl_data->cmd) {
case CMD_KEYPRESS:
case CMD_SCANCODE:
/* ask for a response */
ret = usb_submit_urb(yld->urb_irq, GFP_ATOMIC);
break;
default:
/* send new command */
yealink_do_idle_tasks(yld);
ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
}
if (ret)
err("%s - usb_submit_urb failed %d", __FUNCTION__, ret);
}
/*******************************************************************************
* input event interface
******************************************************************************/
/* TODO should we issue a ringtone on a SND_BELL event?
static int input_ev(struct input_dev *dev, unsigned int type,
unsigned int code, int value)
{
if (type != EV_SND)
return -EINVAL;
switch (code) {
case SND_BELL:
case SND_TONE:
break;
default:
return -EINVAL;
}
return 0;
}
*/
static int input_open(struct input_dev *dev)
{
struct yealink_dev *yld = dev->private;
int i, ret;
dbg("%s", __FUNCTION__);
/* force updates to device */
for (i = 0; i<sizeof(yld->master); i++)
yld->copy.b[i] = ~yld->master.b[i];
yld->key_code = -1; /* no keys pressed */
yealink_set_ringtone(yld, default_ringtone, sizeof(default_ringtone));
/* issue INIT */
memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
yld->ctl_data->cmd = CMD_INIT;
yld->ctl_data->size = 10;
yld->ctl_data->sum = 0x100-CMD_INIT-10;
if ((ret = usb_submit_urb(yld->urb_ctl, GFP_KERNEL)) != 0) {
dbg("%s - usb_submit_urb failed with result %d",
__FUNCTION__, ret);
return ret;
}
return 0;
}
static void input_close(struct input_dev *dev)
{
struct yealink_dev *yld = dev->private;
usb_kill_urb(yld->urb_ctl);
usb_kill_urb(yld->urb_irq);
}
/*******************************************************************************
* sysfs interface
******************************************************************************/
static DECLARE_RWSEM(sysfs_rwsema);
/* Interface to the 7-segments translation table aka. char set.
*/
static ssize_t show_map(struct device *dev, struct device_attribute *attr,
char *buf)
{
memcpy(buf, &map_seg7, sizeof(map_seg7));
return sizeof(map_seg7);
}
static ssize_t store_map(struct device *dev, struct device_attribute *attr,
const char *buf, size_t cnt)
{
if (cnt != sizeof(map_seg7))
return -EINVAL;
memcpy(&map_seg7, buf, sizeof(map_seg7));
return sizeof(map_seg7);
}
/* Interface to the LCD.
*/
/* Reading /sys/../lineX will return the format string with its settings:
*
* Example:
* cat ./line3
* 888888888888
* Linux Rocks!
*/
static ssize_t show_line(struct device *dev, char *buf, int a, int b)
{
struct yealink_dev *yld;
int i;
down_read(&sysfs_rwsema);
yld = dev_get_drvdata(dev);
if (yld == NULL) {
up_read(&sysfs_rwsema);
return -ENODEV;
}
for (i = a; i < b; i++)
*buf++ = lcdMap[i].type;
*buf++ = '\n';
for (i = a; i < b; i++)
*buf++ = yld->lcdMap[i];
*buf++ = '\n';
*buf = 0;
up_read(&sysfs_rwsema);
return 3 + ((b - a) << 1);
}
static ssize_t show_line1(struct device *dev, struct device_attribute *attr,
char *buf)
{
return show_line(dev, buf, LCD_LINE1_OFFSET, LCD_LINE2_OFFSET);
}
static ssize_t show_line2(struct device *dev, struct device_attribute *attr,
char *buf)
{
return show_line(dev, buf, LCD_LINE2_OFFSET, LCD_LINE3_OFFSET);
}
static ssize_t show_line3(struct device *dev, struct device_attribute *attr,
char *buf)
{
return show_line(dev, buf, LCD_LINE3_OFFSET, LCD_LINE4_OFFSET);
}
/* Writing to /sys/../lineX will set the coresponding LCD line.
* - Excess characters are ignored.
* - If less characters are written than allowed, the remaining digits are
* unchanged.
* - The '\n' or '\t' char is a placeholder, it does not overwrite the
* original content.
*/
static ssize_t store_line(struct device *dev, const char *buf, size_t count,
int el, size_t len)
{
struct yealink_dev *yld;
int i;
down_write(&sysfs_rwsema);
yld = dev_get_drvdata(dev);
if (yld == NULL) {
up_write(&sysfs_rwsema);
return -ENODEV;
}
if (len > count)
len = count;
for (i = 0; i < len; i++)
setChar(yld, el++, buf[i]);
up_write(&sysfs_rwsema);
return count;
}
static ssize_t store_line1(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
return store_line(dev, buf, count, LCD_LINE1_OFFSET, LCD_LINE1_SIZE);
}
static ssize_t store_line2(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
return store_line(dev, buf, count, LCD_LINE2_OFFSET, LCD_LINE2_SIZE);
}
static ssize_t store_line3(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
return store_line(dev, buf, count, LCD_LINE3_OFFSET, LCD_LINE3_SIZE);
}
/* Interface to visible and audible "icons", these include:
* pictures on the LCD, the LED, and the dialtone signal.
*/
/* Get a list of "switchable elements" with their current state. */
static ssize_t get_icons(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct yealink_dev *yld;
int i, ret = 1;
down_read(&sysfs_rwsema);
yld = dev_get_drvdata(dev);
if (yld == NULL) {
up_read(&sysfs_rwsema);
return -ENODEV;
}
for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
if (lcdMap[i].type != '.')
continue;
ret += sprintf(&buf[ret], "%s %s\n",
yld->lcdMap[i] == ' ' ? " " : "on",
lcdMap[i].u.p.name);
}
up_read(&sysfs_rwsema);
return ret;
}
/* Change the visibility of a particular element. */
static ssize_t set_icon(struct device *dev, const char *buf, size_t count,
int chr)
{
struct yealink_dev *yld;
int i;
down_write(&sysfs_rwsema);
yld = dev_get_drvdata(dev);
if (yld == NULL) {
up_write(&sysfs_rwsema);
return -ENODEV;
}
for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
if (lcdMap[i].type != '.')
continue;
if (strncmp(buf, lcdMap[i].u.p.name, count) == 0) {
setChar(yld, i, chr);
break;
}
}
up_write(&sysfs_rwsema);
return count;
}
static ssize_t show_icon(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
return set_icon(dev, buf, count, buf[0]);
}
static ssize_t hide_icon(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
return set_icon(dev, buf, count, ' ');
}
/* Upload a ringtone to the device.
*/
/* Stores raw ringtone data in the phone */
static ssize_t store_ringtone(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct yealink_dev *yld;
down_write(&sysfs_rwsema);
yld = dev_get_drvdata(dev);
if (yld == NULL) {
up_write(&sysfs_rwsema);
return -ENODEV;
}
/* TODO locking with async usb control interface??? */
yealink_set_ringtone(yld, (char *)buf, count);
up_write(&sysfs_rwsema);
return count;
}
#define _M444 S_IRUGO
#define _M664 S_IRUGO|S_IWUSR|S_IWGRP
#define _M220 S_IWUSR|S_IWGRP
static DEVICE_ATTR(map_seg7 , _M664, show_map , store_map );
static DEVICE_ATTR(line1 , _M664, show_line1 , store_line1 );
static DEVICE_ATTR(line2 , _M664, show_line2 , store_line2 );
static DEVICE_ATTR(line3 , _M664, show_line3 , store_line3 );
static DEVICE_ATTR(get_icons , _M444, get_icons , NULL );
static DEVICE_ATTR(show_icon , _M220, NULL , show_icon );
static DEVICE_ATTR(hide_icon , _M220, NULL , hide_icon );
static DEVICE_ATTR(ringtone , _M220, NULL , store_ringtone);
static struct attribute *yld_attributes[] = {
&dev_attr_line1.attr,
&dev_attr_line2.attr,
&dev_attr_line3.attr,
&dev_attr_get_icons.attr,
&dev_attr_show_icon.attr,
&dev_attr_hide_icon.attr,
&dev_attr_map_seg7.attr,
&dev_attr_ringtone.attr,
NULL
};
static struct attribute_group yld_attr_group = {
.attrs = yld_attributes
};
/*******************************************************************************
* Linux interface and usb initialisation
******************************************************************************/
struct driver_info {
char *name;
};
static const struct driver_info info_P1K = {
.name = "Yealink usb-p1k",
};
static const struct usb_device_id usb_table [] = {
{
.match_flags = USB_DEVICE_ID_MATCH_DEVICE |
USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x6993,
.idProduct = 0xb001,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&info_P1K
},
{ }
};
static int usb_cleanup(struct yealink_dev *yld, int err)
{
if (yld == NULL)
return err;
if (yld->urb_irq) {
usb_kill_urb(yld->urb_irq);
usb_free_urb(yld->urb_irq);
}
if (yld->urb_ctl)
usb_free_urb(yld->urb_ctl);
if (yld->idev) {
if (err)
input_free_device(yld->idev);
else
input_unregister_device(yld->idev);
}
if (yld->ctl_req)
usb_buffer_free(yld->udev, sizeof(*(yld->ctl_req)),
yld->ctl_req, yld->ctl_req_dma);
if (yld->ctl_data)
usb_buffer_free(yld->udev, USB_PKT_LEN,
yld->ctl_data, yld->ctl_dma);
if (yld->irq_data)
usb_buffer_free(yld->udev, USB_PKT_LEN,
yld->irq_data, yld->irq_dma);
kfree(yld);
return err;
}
static void usb_disconnect(struct usb_interface *intf)
{
struct yealink_dev *yld;
down_write(&sysfs_rwsema);
yld = usb_get_intfdata(intf);
sysfs_remove_group(&intf->dev.kobj, &yld_attr_group);
usb_set_intfdata(intf, NULL);
up_write(&sysfs_rwsema);
usb_cleanup(yld, 0);
}
static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev (intf);
struct driver_info *nfo = (struct driver_info *)id->driver_info;
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct yealink_dev *yld;
struct input_dev *input_dev;
int ret, pipe, i;
interface = intf->cur_altsetting;
endpoint = &interface->endpoint[0].desc;
if (!(endpoint->bEndpointAddress & USB_DIR_IN))
return -EIO;
if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
return -EIO;
yld = kzalloc(sizeof(struct yealink_dev), GFP_KERNEL);
if (!yld)
return -ENOMEM;
yld->udev = udev;
yld->idev = input_dev = input_allocate_device();
if (!input_dev)
return usb_cleanup(yld, -ENOMEM);
/* allocate usb buffers */
yld->irq_data = usb_buffer_alloc(udev, USB_PKT_LEN,
SLAB_ATOMIC, &yld->irq_dma);
if (yld->irq_data == NULL)
return usb_cleanup(yld, -ENOMEM);
yld->ctl_data = usb_buffer_alloc(udev, USB_PKT_LEN,
SLAB_ATOMIC, &yld->ctl_dma);
if (!yld->ctl_data)
return usb_cleanup(yld, -ENOMEM);
yld->ctl_req = usb_buffer_alloc(udev, sizeof(*(yld->ctl_req)),
SLAB_ATOMIC, &yld->ctl_req_dma);
if (yld->ctl_req == NULL)
return usb_cleanup(yld, -ENOMEM);
/* allocate urb structures */
yld->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
if (yld->urb_irq == NULL)
return usb_cleanup(yld, -ENOMEM);
yld->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
if (yld->urb_ctl == NULL)
return usb_cleanup(yld, -ENOMEM);
/* get a handle to the interrupt data pipe */
pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
ret = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
if (ret != USB_PKT_LEN)
err("invalid payload size %d, expected %zd", ret, USB_PKT_LEN);
/* initialise irq urb */
usb_fill_int_urb(yld->urb_irq, udev, pipe, yld->irq_data,
USB_PKT_LEN,
urb_irq_callback,
yld, endpoint->bInterval);
yld->urb_irq->transfer_dma = yld->irq_dma;
yld->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
yld->urb_irq->dev = udev;
/* initialise ctl urb */
yld->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
USB_DIR_OUT;
yld->ctl_req->bRequest = USB_REQ_SET_CONFIGURATION;
yld->ctl_req->wValue = cpu_to_le16(0x200);
yld->ctl_req->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
yld->ctl_req->wLength = cpu_to_le16(USB_PKT_LEN);
usb_fill_control_urb(yld->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
(void *)yld->ctl_req, yld->ctl_data, USB_PKT_LEN,
urb_ctl_callback, yld);
yld->urb_ctl->setup_dma = yld->ctl_req_dma;
yld->urb_ctl->transfer_dma = yld->ctl_dma;
yld->urb_ctl->transfer_flags |= URB_NO_SETUP_DMA_MAP |
URB_NO_TRANSFER_DMA_MAP;
yld->urb_ctl->dev = udev;
/* find out the physical bus location */
usb_make_path(udev, yld->phys, sizeof(yld->phys));
strlcat(yld->phys, "/input0", sizeof(yld->phys));
/* register settings for the input device */
input_dev->name = nfo->name;
input_dev->phys = yld->phys;
usb_to_input_id(udev, &input_dev->id);
input_dev->cdev.dev = &intf->dev;
input_dev->private = yld;
input_dev->open = input_open;
input_dev->close = input_close;
/* input_dev->event = input_ev; TODO */
/* register available key events */
input_dev->evbit[0] = BIT(EV_KEY);
for (i = 0; i < 256; i++) {
int k = map_p1k_to_key(i);
if (k >= 0) {
set_bit(k & 0xff, input_dev->keybit);
if (k >> 8)
set_bit(k >> 8, input_dev->keybit);
}
}
input_register_device(yld->idev);
usb_set_intfdata(intf, yld);
/* clear visible elements */
for (i = 0; i < ARRAY_SIZE(lcdMap); i++)
setChar(yld, i, ' ');
/* display driver version on LCD line 3 */
store_line3(&intf->dev, NULL,
DRIVER_VERSION, sizeof(DRIVER_VERSION));
/* Register sysfs hooks (don't care about failure) */
sysfs_create_group(&intf->dev.kobj, &yld_attr_group);
return 0;
}
static struct usb_driver yealink_driver = {
.name = "yealink",
.probe = usb_probe,
.disconnect = usb_disconnect,
.id_table = usb_table,
};
static int __init yealink_dev_init(void)
{
int ret = usb_register(&yealink_driver);
if (ret == 0)
info(DRIVER_DESC ":" DRIVER_VERSION);
return ret;
}
static void __exit yealink_dev_exit(void)
{
usb_deregister(&yealink_driver);
}
module_init(yealink_dev_init);
module_exit(yealink_dev_exit);
MODULE_DEVICE_TABLE (usb, usb_table);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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