drivers/input/misc/yealink.c

   1 /*
   2  * drivers/usb/input/yealink.c
   3  *
   4  * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  */
  20 /*
  21  * Description:
  22  *   Driver for the USB-P1K voip usb phone.
  23  *   This device is produced by Yealink Network Technology Co Ltd
  24  *   but may be branded under several names:
  25  *      - Yealink usb-p1k
  26  *      - Tiptel 115
  27  *      - ...
  28  *
  29  * This driver is based on:
  30  *   - the usbb2k-api   http://savannah.nongnu.org/projects/usbb2k-api/
  31  *   - information from http://memeteau.free.fr/usbb2k
  32  *   - the xpad-driver  drivers/input/joystick/xpad.c
  33  *
  34  * Thanks to:
  35  *   - Olivier Vandorpe, for providing the usbb2k-api.
  36  *   - Martin Diehl, for spotting my memory allocation bug.
  37  *
  38  * History:
  39  *   20050527 henk      First version, functional keyboard. Keyboard events
  40  *                      will pop-up on the ../input/eventX bus.
  41  *   20050531 henk      Added led, LCD, dialtone and sysfs interface.
  42  *   20050610 henk      Cleanups, make it ready for public consumption.
  43  *   20050630 henk      Cleanups, fixes in response to comments.
  44  *   20050701 henk      sysfs write serialisation, fix potential unload races
  45  *   20050801 henk      Added ringtone, restructure USB
  46  *   20050816 henk      Merge 2.6.13-rc6
  47  */
  48
  49 #include <linux/kernel.h>
  50 #include <linux/slab.h>
  51 #include <linux/module.h>
  52 #include <linux/rwsem.h>
  53 #include <linux/usb/input.h>
  54 #include <linux/map_to_7segment.h>
  55
  56 #include "yealink.h"
  57
  58 #define DRIVER_VERSION "yld-20051230"
  59
  60 #define YEALINK_POLLING_FREQUENCY       10      /* in [Hz] */
  61
  62 struct yld_status {
  63         u8      lcd[24];
  64         u8      led;
  65         u8      dialtone;
  66         u8      ringtone;
  67         u8      keynum;
  68 } __attribute__ ((packed));
  69
  70 /*
  71  * Register the LCD segment and icon map
  72  */
  73 #define _LOC(k,l)       { .a = (k), .m = (l) }
  74 #define _SEG(t, a, am, b, bm, c, cm, d, dm, e, em, f, fm, g, gm)        \
  75         { .type = (t),                                                  \
  76           .u = { .s = { _LOC(a, am), _LOC(b, bm), _LOC(c, cm),          \
  77                         _LOC(d, dm), _LOC(e, em), _LOC(g, gm),          \
  78                         _LOC(f, fm) } } }
  79 #define _PIC(t, h, hm, n)                                               \
  80         { .type = (t),                                                  \
  81           .u = { .p = { .name = (n), .a = (h), .m = (hm) } } }
  82
  83 static const struct lcd_segment_map {
  84         char    type;
  85         union {
  86                 struct pictogram_map {
  87                         u8      a,m;
  88                         char    name[10];
  89                 }       p;
  90                 struct segment_map {
  91                         u8      a,m;
  92                 } s[7];
  93         } u;
  94 } lcdMap[] = {
  95 #include "yealink.h"
  96 };
  97
  98 struct yealink_dev {
  99         struct input_dev *idev;         /* input device */
 100         struct usb_device *udev;        /* usb device */
 101         struct usb_interface *intf;     /* usb interface */
 102
 103         /* irq input channel */
 104         struct yld_ctl_packet   *irq_data;
 105         dma_addr_t              irq_dma;
 106         struct urb              *urb_irq;
 107
 108         /* control output channel */
 109         struct yld_ctl_packet   *ctl_data;
 110         dma_addr_t              ctl_dma;
 111         struct usb_ctrlrequest  *ctl_req;
 112         struct urb              *urb_ctl;
 113
 114         char phys[64];                  /* physical device path */
 115
 116         u8 lcdMap[ARRAY_SIZE(lcdMap)];  /* state of LCD, LED ... */
 117         int key_code;                   /* last reported key     */
 118
 119         unsigned int shutdown:1;
 120
 121         int     stat_ix;
 122         union {
 123                 struct yld_status s;
 124                 u8                b[sizeof(struct yld_status)];
 125         } master, copy;
 126 };
 127
 128
 129 /*******************************************************************************
 130  * Yealink lcd interface
 131  ******************************************************************************/
 132
 133 /*
 134  * Register a default 7 segment character set
 135  */
 136 static SEG7_DEFAULT_MAP(map_seg7);
 137
 138  /* Display a char,
 139   * char '\9' and '\n' are placeholders and do not overwrite the original text.
 140   * A space will always hide an icon.
 141   */
 142 static int setChar(struct yealink_dev *yld, int el, int chr)
 143 {
 144         int i, a, m, val;
 145
 146         if (el >= ARRAY_SIZE(lcdMap))
 147                 return -EINVAL;
 148
 149         if (chr == '\t' || chr == '\n')
 150             return 0;
 151
 152         yld->lcdMap[el] = chr;
 153
 154         if (lcdMap[el].type == '.') {
 155                 a = lcdMap[el].u.p.a;
 156                 m = lcdMap[el].u.p.m;
 157                 if (chr != ' ')
 158                         yld->master.b[a] |= m;
 159                 else
 160                         yld->master.b[a] &= ~m;
 161                 return 0;
 162         }
 163
 164         val = map_to_seg7(&map_seg7, chr);
 165         for (i = 0; i < ARRAY_SIZE(lcdMap[0].u.s); i++) {
 166                 m = lcdMap[el].u.s[i].m;
 167
 168                 if (m == 0)
 169                         continue;
 170
 171                 a = lcdMap[el].u.s[i].a;
 172                 if (val & 1)
 173                         yld->master.b[a] |= m;
 174                 else
 175                         yld->master.b[a] &= ~m;
 176                 val = val >> 1;
 177         }
 178         return 0;
 179 };
 180
 181 /*******************************************************************************
 182  * Yealink key interface
 183  ******************************************************************************/
 184
 185 /* Map device buttons to internal key events.
 186  *
 187  * USB-P1K button layout:
 188  *
 189  *             up
 190  *       IN           OUT
 191  *            down
 192  *
 193  *     pickup   C    hangup
 194  *       1      2      3
 195  *       4      5      6
 196  *       7      8      9
 197  *       *      0      #
 198  *
 199  * The "up" and "down" keys, are symbolised by arrows on the button.
 200  * The "pickup" and "hangup" keys are symbolised by a green and red phone
 201  * on the button.
 202  */
 203 static int map_p1k_to_key(int scancode)
 204 {
 205         switch(scancode) {              /* phone key:   */
 206         case 0x23: return KEY_LEFT;     /*   IN         */
 207         case 0x33: return KEY_UP;       /*   up         */
 208         case 0x04: return KEY_RIGHT;    /*   OUT        */
 209         case 0x24: return KEY_DOWN;     /*   down       */
 210         case 0x03: return KEY_ENTER;    /*   pickup     */
 211         case 0x14: return KEY_BACKSPACE; /*  C          */
 212         case 0x13: return KEY_ESC;      /*   hangup     */
 213         case 0x00: return KEY_1;        /*   1          */
 214         case 0x01: return KEY_2;        /*   2          */
 215         case 0x02: return KEY_3;        /*   3          */
 216         case 0x10: return KEY_4;        /*   4          */
 217         case 0x11: return KEY_5;        /*   5          */
 218         case 0x12: return KEY_6;        /*   6          */
 219         case 0x20: return KEY_7;        /*   7          */
 220         case 0x21: return KEY_8;        /*   8          */
 221         case 0x22: return KEY_9;        /*   9          */
 222         case 0x30: return KEY_KPASTERISK; /* *          */
 223         case 0x31: return KEY_0;        /*   0          */
 224         case 0x32: return KEY_LEFTSHIFT |
 225                           KEY_3 << 8;   /*   #          */
 226         }
 227         return -EINVAL;
 228 }
 229
 230 /* Completes a request by converting the data into events for the
 231  * input subsystem.
 232  *
 233  * The key parameter can be cascaded: key2 << 8 | key1
 234  */
 235 static void report_key(struct yealink_dev *yld, int key)
 236 {
 237         struct input_dev *idev = yld->idev;
 238
 239         if (yld->key_code >= 0) {
 240                 /* old key up */
 241                 input_report_key(idev, yld->key_code & 0xff, 0);
 242                 if (yld->key_code >> 8)
 243                         input_report_key(idev, yld->key_code >> 8, 0);
 244         }
 245
 246         yld->key_code = key;
 247         if (key >= 0) {
 248                 /* new valid key */
 249                 input_report_key(idev, key & 0xff, 1);
 250                 if (key >> 8)
 251                         input_report_key(idev, key >> 8, 1);
 252         }
 253         input_sync(idev);
 254 }
 255
 256 /*******************************************************************************
 257  * Yealink usb communication interface
 258  ******************************************************************************/
 259
 260 static int yealink_cmd(struct yealink_dev *yld, struct yld_ctl_packet *p)
 261 {
 262         u8      *buf = (u8 *)p;
 263         int     i;
 264         u8      sum = 0;
 265
 266         for(i=0; i<USB_PKT_LEN-1; i++)
 267                 sum -= buf[i];
 268         p->sum = sum;
 269         return usb_control_msg(yld->udev,
 270                         usb_sndctrlpipe(yld->udev, 0),
 271                         USB_REQ_SET_CONFIGURATION,
 272                         USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
 273                         0x200, 3,
 274                         p, sizeof(*p),
 275                         USB_CTRL_SET_TIMEOUT);
 276 }
 277
 278 static u8 default_ringtone[] = {
 279         0xEF,                   /* volume [0-255] */
 280         0xFB, 0x1E, 0x00, 0x0C, /* 1250 [hz], 12/100 [s] */
 281         0xFC, 0x18, 0x00, 0x0C, /* 1000 [hz], 12/100 [s] */
 282         0xFB, 0x1E, 0x00, 0x0C,
 283         0xFC, 0x18, 0x00, 0x0C,
 284         0xFB, 0x1E, 0x00, 0x0C,
 285         0xFC, 0x18, 0x00, 0x0C,
 286         0xFB, 0x1E, 0x00, 0x0C,
 287         0xFC, 0x18, 0x00, 0x0C,
 288         0xFF, 0xFF, 0x01, 0x90, /* silent, 400/100 [s] */
 289         0x00, 0x00              /* end of sequence */
 290 };
 291
 292 static int yealink_set_ringtone(struct yealink_dev *yld, u8 *buf, size_t size)
 293 {
 294         struct yld_ctl_packet *p = yld->ctl_data;
 295         int     ix, len;
 296
 297         if (size <= 0)
 298                 return -EINVAL;
 299
 300         /* Set the ringtone volume */
 301         memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
 302         yld->ctl_data->cmd      = CMD_RING_VOLUME;
 303         yld->ctl_data->size     = 1;
 304         yld->ctl_data->data[0]  = buf[0];
 305         yealink_cmd(yld, p);
 306
 307         buf++;
 308         size--;
 309
 310         p->cmd = CMD_RING_NOTE;
 311         ix = 0;
 312         while (size != ix) {
 313                 len = size - ix;
 314                 if (len > sizeof(p->data))
 315                         len = sizeof(p->data);
 316                 p->size   = len;
 317                 p->offset = cpu_to_be16(ix);
 318                 memcpy(p->data, &buf[ix], len);
 319                 yealink_cmd(yld, p);
 320                 ix += len;
 321         }
 322         return 0;
 323 }
 324
 325 /* keep stat_master & stat_copy in sync.
 326  */
 327 static int yealink_do_idle_tasks(struct yealink_dev *yld)
 328 {
 329         u8 val;
 330         int i, ix, len;
 331
 332         ix = yld->stat_ix;
 333
 334         memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
 335         yld->ctl_data->cmd  = CMD_KEYPRESS;
 336         yld->ctl_data->size = 1;
 337         yld->ctl_data->sum  = 0xff - CMD_KEYPRESS;
 338
 339         /* If state update pointer wraps do a KEYPRESS first. */
 340         if (ix >= sizeof(yld->master)) {
 341                 yld->stat_ix = 0;
 342                 return 0;
 343         }
 344
 345         /* find update candidates: copy != master */
 346         do {
 347                 val = yld->master.b[ix];
 348                 if (val != yld->copy.b[ix])
 349                         goto send_update;
 350         } while (++ix < sizeof(yld->master));
 351
 352         /* nothing todo, wait a bit and poll for a KEYPRESS */
 353         yld->stat_ix = 0;
 354         /* TODO how can we wait abit. ??
 355          * msleep_interruptible(1000 / YEALINK_POLLING_FREQUENCY);
 356          */
 357         return 0;
 358
 359 send_update:
 360
 361         /* Setup an appropriate update request */
 362         yld->copy.b[ix] = val;
 363         yld->ctl_data->data[0] = val;
 364
 365         switch(ix) {
 366         case offsetof(struct yld_status, led):
 367                 yld->ctl_data->cmd      = CMD_LED;
 368                 yld->ctl_data->sum      = -1 - CMD_LED - val;
 369                 break;
 370         case offsetof(struct yld_status, dialtone):
 371                 yld->ctl_data->cmd      = CMD_DIALTONE;
 372                 yld->ctl_data->sum      = -1 - CMD_DIALTONE - val;
 373                 break;
 374         case offsetof(struct yld_status, ringtone):
 375                 yld->ctl_data->cmd      = CMD_RINGTONE;
 376                 yld->ctl_data->sum      = -1 - CMD_RINGTONE - val;
 377                 break;
 378         case offsetof(struct yld_status, keynum):
 379                 val--;
 380                 val &= 0x1f;
 381                 yld->ctl_data->cmd      = CMD_SCANCODE;
 382                 yld->ctl_data->offset   = cpu_to_be16(val);
 383                 yld->ctl_data->data[0]  = 0;
 384                 yld->ctl_data->sum      = -1 - CMD_SCANCODE - val;
 385                 break;
 386         default:
 387                 len = sizeof(yld->master.s.lcd) - ix;
 388                 if (len > sizeof(yld->ctl_data->data))
 389                         len = sizeof(yld->ctl_data->data);
 390
 391                 /* Combine up to <len> consecutive LCD bytes in a singe request
 392                  */
 393                 yld->ctl_data->cmd      = CMD_LCD;
 394                 yld->ctl_data->offset   = cpu_to_be16(ix);
 395                 yld->ctl_data->size     = len;
 396                 yld->ctl_data->sum      = -CMD_LCD - ix - val - len;
 397                 for(i=1; i<len; i++) {
 398                         ix++;
 399                         val = yld->master.b[ix];
 400                         yld->copy.b[ix]         = val;
 401                         yld->ctl_data->data[i]  = val;
 402                         yld->ctl_data->sum     -= val;
 403                 }
 404         }
 405         yld->stat_ix = ix + 1;
 406         return 1;
 407 }
 408
 409 /* Decide on how to handle responses
 410  *
 411  * The state transition diagram is somethhing like:
 412  *
 413  *          syncState<--+
 414  *               |      |
 415  *               |    idle
 416  *              \|/     |
 417  * init --ok--> waitForKey --ok--> getKey
 418  *  ^               ^                |
 419  *  |               +-------ok-------+
 420  * error,start
 421  *
 422  */
 423 static void urb_irq_callback(struct urb *urb)
 424 {
 425         struct yealink_dev *yld = urb->context;
 426         int ret, status = urb->status;
 427
 428         if (status)
 429                 dev_err(&yld->intf->dev, "%s - urb status %d\n",
 430                         __func__, status);
 431
 432         switch (yld->irq_data->cmd) {
 433         case CMD_KEYPRESS:
 434
 435                 yld->master.s.keynum = yld->irq_data->data[0];
 436                 break;
 437
 438         case CMD_SCANCODE:
 439                 dev_dbg(&yld->intf->dev, "get scancode %x\n",
 440                         yld->irq_data->data[0]);
 441
 442                 report_key(yld, map_p1k_to_key(yld->irq_data->data[0]));
 443                 break;
 444
 445         default:
 446                 dev_err(&yld->intf->dev, "unexpected response %x\n",
 447                         yld->irq_data->cmd);
 448         }
 449
 450         yealink_do_idle_tasks(yld);
 451
 452         if (!yld->shutdown) {
 453                 ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
 454                 if (ret && ret != -EPERM)
 455                         dev_err(&yld->intf->dev,
 456                                 "%s - usb_submit_urb failed %d\n",
 457                                 __func__, ret);
 458         }
 459 }
 460
 461 static void urb_ctl_callback(struct urb *urb)
 462 {
 463         struct yealink_dev *yld = urb->context;
 464         int ret = 0, status = urb->status;
 465
 466         if (status)
 467                 dev_err(&yld->intf->dev, "%s - urb status %d\n",
 468                         __func__, status);
 469
 470         switch (yld->ctl_data->cmd) {
 471         case CMD_KEYPRESS:
 472         case CMD_SCANCODE:
 473                 /* ask for a response */
 474                 if (!yld->shutdown)
 475                         ret = usb_submit_urb(yld->urb_irq, GFP_ATOMIC);
 476                 break;
 477         default:
 478                 /* send new command */
 479                 yealink_do_idle_tasks(yld);
 480                 if (!yld->shutdown)
 481                         ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
 482                 break;
 483         }
 484
 485         if (ret && ret != -EPERM)
 486                 dev_err(&yld->intf->dev, "%s - usb_submit_urb failed %d\n",
 487                         __func__, ret);
 488 }
 489
 490 /*******************************************************************************
 491  * input event interface
 492  ******************************************************************************/
 493
 494 /* TODO should we issue a ringtone on a SND_BELL event?
 495 static int input_ev(struct input_dev *dev, unsigned int type,
 496                 unsigned int code, int value)
 497 {
 498
 499         if (type != EV_SND)
 500                 return -EINVAL;
 501
 502         switch (code) {
 503         case SND_BELL:
 504         case SND_TONE:
 505                 break;
 506         default:
 507                 return -EINVAL;
 508         }
 509
 510         return 0;
 511 }
 512 */
 513
 514 static int input_open(struct input_dev *dev)
 515 {
 516         struct yealink_dev *yld = input_get_drvdata(dev);
 517         int i, ret;
 518
 519         dev_dbg(&yld->intf->dev, "%s\n", __func__);
 520
 521         /* force updates to device */
 522         for (i = 0; i<sizeof(yld->master); i++)
 523                 yld->copy.b[i] = ~yld->master.b[i];
 524         yld->key_code = -1;     /* no keys pressed */
 525
 526         yealink_set_ringtone(yld, default_ringtone, sizeof(default_ringtone));
 527
 528         /* issue INIT */
 529         memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
 530         yld->ctl_data->cmd      = CMD_INIT;
 531         yld->ctl_data->size     = 10;
 532         yld->ctl_data->sum      = 0x100-CMD_INIT-10;
 533         if ((ret = usb_submit_urb(yld->urb_ctl, GFP_KERNEL)) != 0) {
 534                 dev_dbg(&yld->intf->dev,
 535                         "%s - usb_submit_urb failed with result %d\n",
 536                         __func__, ret);
 537                 return ret;
 538         }
 539         return 0;
 540 }
 541
 542 static void input_close(struct input_dev *dev)
 543 {
 544         struct yealink_dev *yld = input_get_drvdata(dev);
 545
 546         yld->shutdown = 1;
 547         /*
 548          * Make sure the flag is seen by other CPUs before we start
 549          * killing URBs so new URBs won't be submitted
 550          */
 551         smp_wmb();
 552
 553         usb_kill_urb(yld->urb_ctl);
 554         usb_kill_urb(yld->urb_irq);
 555
 556         yld->shutdown = 0;
 557         smp_wmb();
 558 }
 559
 560 /*******************************************************************************
 561  * sysfs interface
 562  ******************************************************************************/
 563
 564 static DECLARE_RWSEM(sysfs_rwsema);
 565
 566 /* Interface to the 7-segments translation table aka. char set.
 567  */
 568 static ssize_t show_map(struct device *dev, struct device_attribute *attr,
 569                                 char *buf)
 570 {
 571         memcpy(buf, &map_seg7, sizeof(map_seg7));
 572         return sizeof(map_seg7);
 573 }
 574
 575 static ssize_t store_map(struct device *dev, struct device_attribute *attr,
 576                                 const char *buf, size_t cnt)
 577 {
 578         if (cnt != sizeof(map_seg7))
 579                 return -EINVAL;
 580         memcpy(&map_seg7, buf, sizeof(map_seg7));
 581         return sizeof(map_seg7);
 582 }
 583
 584 /* Interface to the LCD.
 585  */
 586
 587 /* Reading /sys/../lineX will return the format string with its settings:
 588  *
 589  * Example:
 590  * cat ./line3
 591  * 888888888888
 592  * Linux Rocks!
 593  */
 594 static ssize_t show_line(struct device *dev, char *buf, int a, int b)
 595 {
 596         struct yealink_dev *yld;
 597         int i;
 598
 599         down_read(&sysfs_rwsema);
 600         yld = dev_get_drvdata(dev);
 601         if (yld == NULL) {
 602                 up_read(&sysfs_rwsema);
 603                 return -ENODEV;
 604         }
 605
 606         for (i = a; i < b; i++)
 607                 *buf++ = lcdMap[i].type;
 608         *buf++ = '\n';
 609         for (i = a; i < b; i++)
 610                 *buf++ = yld->lcdMap[i];
 611         *buf++ = '\n';
 612         *buf = 0;
 613
 614         up_read(&sysfs_rwsema);
 615         return 3 + ((b - a) << 1);
 616 }
 617
 618 static ssize_t show_line1(struct device *dev, struct device_attribute *attr,
 619                         char *buf)
 620 {
 621         return show_line(dev, buf, LCD_LINE1_OFFSET, LCD_LINE2_OFFSET);
 622 }
 623
 624 static ssize_t show_line2(struct device *dev, struct device_attribute *attr,
 625                         char *buf)
 626 {
 627         return show_line(dev, buf, LCD_LINE2_OFFSET, LCD_LINE3_OFFSET);
 628 }
 629
 630 static ssize_t show_line3(struct device *dev, struct device_attribute *attr,
 631                         char *buf)
 632 {
 633         return show_line(dev, buf, LCD_LINE3_OFFSET, LCD_LINE4_OFFSET);
 634 }
 635
 636 /* Writing to /sys/../lineX will set the coresponding LCD line.
 637  * - Excess characters are ignored.
 638  * - If less characters are written than allowed, the remaining digits are
 639  *   unchanged.
 640  * - The '\n' or '\t' char is a placeholder, it does not overwrite the
 641  *   original content.
 642  */
 643 static ssize_t store_line(struct device *dev, const char *buf, size_t count,
 644                 int el, size_t len)
 645 {
 646         struct yealink_dev *yld;
 647         int i;
 648
 649         down_write(&sysfs_rwsema);
 650         yld = dev_get_drvdata(dev);
 651         if (yld == NULL) {
 652                 up_write(&sysfs_rwsema);
 653                 return -ENODEV;
 654         }
 655
 656         if (len > count)
 657                 len = count;
 658         for (i = 0; i < len; i++)
 659                 setChar(yld, el++, buf[i]);
 660
 661         up_write(&sysfs_rwsema);
 662         return count;
 663 }
 664
 665 static ssize_t store_line1(struct device *dev, struct device_attribute *attr,
 666                                 const char *buf, size_t count)
 667 {
 668         return store_line(dev, buf, count, LCD_LINE1_OFFSET, LCD_LINE1_SIZE);
 669 }
 670
 671 static ssize_t store_line2(struct device *dev, struct device_attribute *attr,
 672                                 const char *buf, size_t count)
 673 {
 674         return store_line(dev, buf, count, LCD_LINE2_OFFSET, LCD_LINE2_SIZE);
 675 }
 676
 677 static ssize_t store_line3(struct device *dev, struct device_attribute *attr,
 678                                 const char *buf, size_t count)
 679 {
 680         return store_line(dev, buf, count, LCD_LINE3_OFFSET, LCD_LINE3_SIZE);
 681 }
 682
 683 /* Interface to visible and audible "icons", these include:
 684  * pictures on the LCD, the LED, and the dialtone signal.
 685  */
 686
 687 /* Get a list of "switchable elements" with their current state. */
 688 static ssize_t get_icons(struct device *dev, struct device_attribute *attr,
 689                         char *buf)
 690 {
 691         struct yealink_dev *yld;
 692         int i, ret = 1;
 693
 694         down_read(&sysfs_rwsema);
 695         yld = dev_get_drvdata(dev);
 696         if (yld == NULL) {
 697                 up_read(&sysfs_rwsema);
 698                 return -ENODEV;
 699         }
 700
 701         for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
 702                 if (lcdMap[i].type != '.')
 703                         continue;
 704                 ret += sprintf(&buf[ret], "%s %s\n",
 705                                 yld->lcdMap[i] == ' ' ? "  " : "on",
 706                                 lcdMap[i].u.p.name);
 707         }
 708         up_read(&sysfs_rwsema);
 709         return ret;
 710 }
 711
 712 /* Change the visibility of a particular element. */
 713 static ssize_t set_icon(struct device *dev, const char *buf, size_t count,
 714                         int chr)
 715 {
 716         struct yealink_dev *yld;
 717         int i;
 718
 719         down_write(&sysfs_rwsema);
 720         yld = dev_get_drvdata(dev);
 721         if (yld == NULL) {
 722                 up_write(&sysfs_rwsema);
 723                 return -ENODEV;
 724         }
 725
 726         for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
 727                 if (lcdMap[i].type != '.')
 728                         continue;
 729                 if (strncmp(buf, lcdMap[i].u.p.name, count) == 0) {
 730                         setChar(yld, i, chr);
 731                         break;
 732                 }
 733         }
 734
 735         up_write(&sysfs_rwsema);
 736         return count;
 737 }
 738
 739 static ssize_t show_icon(struct device *dev, struct device_attribute *attr,
 740                 const char *buf, size_t count)
 741 {
 742         return set_icon(dev, buf, count, buf[0]);
 743 }
 744
 745 static ssize_t hide_icon(struct device *dev, struct device_attribute *attr,
 746                 const char *buf, size_t count)
 747 {
 748         return set_icon(dev, buf, count, ' ');
 749 }
 750
 751 /* Upload a ringtone to the device.
 752  */
 753
 754 /* Stores raw ringtone data in the phone */
 755 static ssize_t store_ringtone(struct device *dev,
 756                 struct device_attribute *attr,
 757                 const char *buf, size_t count)
 758 {
 759         struct yealink_dev *yld;
 760
 761         down_write(&sysfs_rwsema);
 762         yld = dev_get_drvdata(dev);
 763         if (yld == NULL) {
 764                 up_write(&sysfs_rwsema);
 765                 return -ENODEV;
 766         }
 767
 768         /* TODO locking with async usb control interface??? */
 769         yealink_set_ringtone(yld, (char *)buf, count);
 770         up_write(&sysfs_rwsema);
 771         return count;
 772 }
 773
 774 #define _M444   S_IRUGO
 775 #define _M664   S_IRUGO|S_IWUSR|S_IWGRP
 776 #define _M220   S_IWUSR|S_IWGRP
 777
 778 static DEVICE_ATTR(map_seg7     , _M664, show_map       , store_map     );
 779 static DEVICE_ATTR(line1        , _M664, show_line1     , store_line1   );
 780 static DEVICE_ATTR(line2        , _M664, show_line2     , store_line2   );
 781 static DEVICE_ATTR(line3        , _M664, show_line3     , store_line3   );
 782 static DEVICE_ATTR(get_icons    , _M444, get_icons      , NULL          );
 783 static DEVICE_ATTR(show_icon    , _M220, NULL           , show_icon     );
 784 static DEVICE_ATTR(hide_icon    , _M220, NULL           , hide_icon     );
 785 static DEVICE_ATTR(ringtone     , _M220, NULL           , store_ringtone);
 786
 787 static struct attribute *yld_attributes[] = {
 788         &dev_attr_line1.attr,
 789         &dev_attr_line2.attr,
 790         &dev_attr_line3.attr,
 791         &dev_attr_get_icons.attr,
 792         &dev_attr_show_icon.attr,
 793         &dev_attr_hide_icon.attr,
 794         &dev_attr_map_seg7.attr,
 795         &dev_attr_ringtone.attr,
 796         NULL
 797 };
 798
 799 static const struct attribute_group yld_attr_group = {
 800         .attrs = yld_attributes
 801 };
 802
 803 /*******************************************************************************
 804  * Linux interface and usb initialisation
 805  ******************************************************************************/
 806
 807 struct driver_info {
 808         char *name;
 809 };
 810
 811 static const struct driver_info info_P1K = {
 812         .name   = "Yealink usb-p1k",
 813 };
 814
 815 static const struct usb_device_id usb_table [] = {
 816         {
 817                 .match_flags            = USB_DEVICE_ID_MATCH_DEVICE |
 818                                                 USB_DEVICE_ID_MATCH_INT_INFO,
 819                 .idVendor               = 0x6993,
 820                 .idProduct              = 0xb001,
 821                 .bInterfaceClass        = USB_CLASS_HID,
 822                 .bInterfaceSubClass     = 0,
 823                 .bInterfaceProtocol     = 0,
 824                 .driver_info            = (kernel_ulong_t)&info_P1K
 825         },
 826         { }
 827 };
 828
 829 static int usb_cleanup(struct yealink_dev *yld, int err)
 830 {
 831         if (yld == NULL)
 832                 return err;
 833
 834         if (yld->idev) {
 835                 if (err)
 836                         input_free_device(yld->idev);
 837                 else
 838                         input_unregister_device(yld->idev);
 839         }
 840
 841         usb_free_urb(yld->urb_irq);
 842         usb_free_urb(yld->urb_ctl);
 843
 844         kfree(yld->ctl_req);
 845         usb_free_coherent(yld->udev, USB_PKT_LEN, yld->ctl_data, yld->ctl_dma);
 846         usb_free_coherent(yld->udev, USB_PKT_LEN, yld->irq_data, yld->irq_dma);
 847
 848         kfree(yld);
 849         return err;
 850 }
 851
 852 static void usb_disconnect(struct usb_interface *intf)
 853 {
 854         struct yealink_dev *yld;
 855
 856         down_write(&sysfs_rwsema);
 857         yld = usb_get_intfdata(intf);
 858         sysfs_remove_group(&intf->dev.kobj, &yld_attr_group);
 859         usb_set_intfdata(intf, NULL);
 860         up_write(&sysfs_rwsema);
 861
 862         usb_cleanup(yld, 0);
 863 }
 864
 865 static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 866 {
 867         struct usb_device *udev = interface_to_usbdev (intf);
 868         struct driver_info *nfo = (struct driver_info *)id->driver_info;
 869         struct usb_host_interface *interface;
 870         struct usb_endpoint_descriptor *endpoint;
 871         struct yealink_dev *yld;
 872         struct input_dev *input_dev;
 873         int ret, pipe, i;
 874
 875         interface = intf->cur_altsetting;
 876
 877         if (interface->desc.bNumEndpoints < 1)
 878                 return -ENODEV;
 879
 880         endpoint = &interface->endpoint[0].desc;
 881         if (!usb_endpoint_is_int_in(endpoint))
 882                 return -ENODEV;
 883
 884         yld = kzalloc(sizeof(struct yealink_dev), GFP_KERNEL);
 885         if (!yld)
 886                 return -ENOMEM;
 887
 888         yld->udev = udev;
 889         yld->intf = intf;
 890
 891         yld->idev = input_dev = input_allocate_device();
 892         if (!input_dev)
 893                 return usb_cleanup(yld, -ENOMEM);
 894
 895         /* allocate usb buffers */
 896         yld->irq_data = usb_alloc_coherent(udev, USB_PKT_LEN,
 897                                            GFP_KERNEL, &yld->irq_dma);
 898         if (yld->irq_data == NULL)
 899                 return usb_cleanup(yld, -ENOMEM);
 900
 901         yld->ctl_data = usb_alloc_coherent(udev, USB_PKT_LEN,
 902                                            GFP_KERNEL, &yld->ctl_dma);
 903         if (!yld->ctl_data)
 904                 return usb_cleanup(yld, -ENOMEM);
 905
 906         yld->ctl_req = kmalloc(sizeof(*(yld->ctl_req)), GFP_KERNEL);
 907         if (yld->ctl_req == NULL)
 908                 return usb_cleanup(yld, -ENOMEM);
 909
 910         /* allocate urb structures */
 911         yld->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
 912         if (yld->urb_irq == NULL)
 913                 return usb_cleanup(yld, -ENOMEM);
 914
 915         yld->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
 916         if (yld->urb_ctl == NULL)
 917                 return usb_cleanup(yld, -ENOMEM);
 918
 919         /* get a handle to the interrupt data pipe */
 920         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
 921         ret = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 922         if (ret != USB_PKT_LEN)
 923                 dev_err(&intf->dev, "invalid payload size %d, expected %zd\n",
 924                         ret, USB_PKT_LEN);
 925
 926         /* initialise irq urb */
 927         usb_fill_int_urb(yld->urb_irq, udev, pipe, yld->irq_data,
 928                         USB_PKT_LEN,
 929                         urb_irq_callback,
 930                         yld, endpoint->bInterval);
 931         yld->urb_irq->transfer_dma = yld->irq_dma;
 932         yld->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 933         yld->urb_irq->dev = udev;
 934
 935         /* initialise ctl urb */
 936         yld->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
 937                                       USB_DIR_OUT;
 938         yld->ctl_req->bRequest  = USB_REQ_SET_CONFIGURATION;
 939         yld->ctl_req->wValue    = cpu_to_le16(0x200);
 940         yld->ctl_req->wIndex    = cpu_to_le16(interface->desc.bInterfaceNumber);
 941         yld->ctl_req->wLength   = cpu_to_le16(USB_PKT_LEN);
 942
 943         usb_fill_control_urb(yld->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
 944                         (void *)yld->ctl_req, yld->ctl_data, USB_PKT_LEN,
 945                         urb_ctl_callback, yld);
 946         yld->urb_ctl->transfer_dma      = yld->ctl_dma;
 947         yld->urb_ctl->transfer_flags    |= URB_NO_TRANSFER_DMA_MAP;
 948         yld->urb_ctl->dev = udev;
 949
 950         /* find out the physical bus location */
 951         usb_make_path(udev, yld->phys, sizeof(yld->phys));
 952         strlcat(yld->phys,  "/input0", sizeof(yld->phys));
 953
 954         /* register settings for the input device */
 955         input_dev->name = nfo->name;
 956         input_dev->phys = yld->phys;
 957         usb_to_input_id(udev, &input_dev->id);
 958         input_dev->dev.parent = &intf->dev;
 959
 960         input_set_drvdata(input_dev, yld);
 961
 962         input_dev->open = input_open;
 963         input_dev->close = input_close;
 964         /* input_dev->event = input_ev; TODO */
 965
 966         /* register available key events */
 967         input_dev->evbit[0] = BIT_MASK(EV_KEY);
 968         for (i = 0; i < 256; i++) {
 969                 int k = map_p1k_to_key(i);
 970                 if (k >= 0) {
 971                         set_bit(k & 0xff, input_dev->keybit);
 972                         if (k >> 8)
 973                                 set_bit(k >> 8, input_dev->keybit);
 974                 }
 975         }
 976
 977         ret = input_register_device(yld->idev);
 978         if (ret)
 979                 return usb_cleanup(yld, ret);
 980
 981         usb_set_intfdata(intf, yld);
 982
 983         /* clear visible elements */
 984         for (i = 0; i < ARRAY_SIZE(lcdMap); i++)
 985                 setChar(yld, i, ' ');
 986
 987         /* display driver version on LCD line 3 */
 988         store_line3(&intf->dev, NULL,
 989                         DRIVER_VERSION, sizeof(DRIVER_VERSION));
 990
 991         /* Register sysfs hooks (don't care about failure) */
 992         ret = sysfs_create_group(&intf->dev.kobj, &yld_attr_group);
 993         return 0;
 994 }
 995
 996 static struct usb_driver yealink_driver = {
 997         .name           = "yealink",
 998         .probe          = usb_probe,
 999         .disconnect     = usb_disconnect,
1000         .id_table       = usb_table,
1001 };
1002
1003 module_usb_driver(yealink_driver);
1004
1005 MODULE_DEVICE_TABLE (usb, usb_table);
1006
1007 MODULE_AUTHOR("Henk Vergonet");
1008 MODULE_DESCRIPTION("Yealink phone driver");
1009 MODULE_LICENSE("GPL");