drivers/input/misc/cm109.c

   1 /*
   2  * Driver for the VoIP USB phones with CM109 chipsets.
   3  *
   4  * Copyright (C) 2007 - 2008 Alfred E. Heggestad <aeh@db.org>
   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, version 2.
   9  */
  10
  11 /*
  12  *   Tested devices:
  13  *      - Komunikate KIP1000
  14  *      - Genius G-talk
  15  *      - Allied-Telesis Corega USBPH01
  16  *      - ...
  17  *
  18  * This driver is based on the yealink.c driver
  19  *
  20  * Thanks to:
  21  *   - Authors of yealink.c
  22  *   - Thomas Reitmayr
  23  *   - Oliver Neukum for good review comments and code
  24  *   - Shaun Jackman <sjackman@gmail.com> for Genius G-talk keymap
  25  *   - Dmitry Torokhov for valuable input and review
  26  *
  27  * Todo:
  28  *   - Read/write EEPROM
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/init.h>
  33 #include <linux/slab.h>
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/rwsem.h>
  37 #include <linux/usb/input.h>
  38
  39 #define DRIVER_VERSION "20080805"
  40 #define DRIVER_AUTHOR  "Alfred E. Heggestad"
  41 #define DRIVER_DESC    "CM109 phone driver"
  42
  43 static char *phone = "kip1000";
  44 module_param(phone, charp, S_IRUSR);
  45 MODULE_PARM_DESC(phone, "Phone name {kip1000, gtalk, usbph01, atcom}");
  46
  47 enum {
  48         /* HID Registers */
  49         HID_IR0 = 0x00, /* Record/Playback-mute button, Volume up/down  */
  50         HID_IR1 = 0x01, /* GPI, generic registers or EEPROM_DATA0       */
  51         HID_IR2 = 0x02, /* Generic registers or EEPROM_DATA1            */
  52         HID_IR3 = 0x03, /* Generic registers or EEPROM_CTRL             */
  53         HID_OR0 = 0x00, /* Mapping control, buzzer, SPDIF (offset 0x04) */
  54         HID_OR1 = 0x01, /* GPO - General Purpose Output                 */
  55         HID_OR2 = 0x02, /* Set GPIO to input/output mode                */
  56         HID_OR3 = 0x03, /* SPDIF status channel or EEPROM_CTRL          */
  57
  58         /* HID_IR0 */
  59         RECORD_MUTE   = 1 << 3,
  60         PLAYBACK_MUTE = 1 << 2,
  61         VOLUME_DOWN   = 1 << 1,
  62         VOLUME_UP     = 1 << 0,
  63
  64         /* HID_OR0 */
  65         /* bits 7-6
  66            0: HID_OR1-2 are used for GPO; HID_OR0, 3 are used for buzzer
  67               and SPDIF
  68            1: HID_OR0-3 are used as generic HID registers
  69            2: Values written to HID_OR0-3 are also mapped to MCU_CTRL,
  70               EEPROM_DATA0-1, EEPROM_CTRL (see Note)
  71            3: Reserved
  72          */
  73         HID_OR_GPO_BUZ_SPDIF   = 0 << 6,
  74         HID_OR_GENERIC_HID_REG = 1 << 6,
  75         HID_OR_MAP_MCU_EEPROM  = 2 << 6,
  76
  77         BUZZER_ON = 1 << 5,
  78
  79         /* up to 256 normal keys, up to 15 special key combinations */
  80         KEYMAP_SIZE = 256 + 15,
  81 };
  82
  83 /* CM109 protocol packet */
  84 struct cm109_ctl_packet {
  85         u8 byte[4];
  86 } __attribute__ ((packed));
  87
  88 enum { USB_PKT_LEN = sizeof(struct cm109_ctl_packet) };
  89
  90 /* CM109 device structure */
  91 struct cm109_dev {
  92         struct input_dev *idev;  /* input device */
  93         struct usb_device *udev; /* usb device */
  94         struct usb_interface *intf;
  95
  96         /* irq input channel */
  97         struct cm109_ctl_packet *irq_data;
  98         dma_addr_t irq_dma;
  99         struct urb *urb_irq;
 100
 101         /* control output channel */
 102         struct cm109_ctl_packet *ctl_data;
 103         dma_addr_t ctl_dma;
 104         struct usb_ctrlrequest *ctl_req;
 105         struct urb *urb_ctl;
 106         /*
 107          * The 3 bitfields below are protected by ctl_submit_lock.
 108          * They have to be separate since they are accessed from IRQ
 109          * context.
 110          */
 111         unsigned irq_urb_pending:1;     /* irq_urb is in flight */
 112         unsigned ctl_urb_pending:1;     /* ctl_urb is in flight */
 113         unsigned buzzer_pending:1;      /* need to issue buzz command */
 114         spinlock_t ctl_submit_lock;
 115
 116         unsigned char buzzer_state;     /* on/off */
 117
 118         /* flags */
 119         unsigned open:1;
 120         unsigned resetting:1;
 121         unsigned shutdown:1;
 122
 123         /* This mutex protects writes to the above flags */
 124         struct mutex pm_mutex;
 125
 126         unsigned short keymap[KEYMAP_SIZE];
 127
 128         char phys[64];          /* physical device path */
 129         int key_code;           /* last reported key */
 130         int keybit;             /* 0=new scan  1,2,4,8=scan columns  */
 131         u8 gpi;                 /* Cached value of GPI (high nibble) */
 132 };
 133
 134 /******************************************************************************
 135  * CM109 key interface
 136  *****************************************************************************/
 137
 138 static unsigned short special_keymap(int code)
 139 {
 140         if (code > 0xff) {
 141                 switch (code - 0xff) {
 142                 case RECORD_MUTE:       return KEY_MICMUTE;
 143                 case PLAYBACK_MUTE:     return KEY_MUTE;
 144                 case VOLUME_DOWN:       return KEY_VOLUMEDOWN;
 145                 case VOLUME_UP:         return KEY_VOLUMEUP;
 146                 }
 147         }
 148         return KEY_RESERVED;
 149 }
 150
 151 /* Map device buttons to internal key events.
 152  *
 153  * The "up" and "down" keys, are symbolised by arrows on the button.
 154  * The "pickup" and "hangup" keys are symbolised by a green and red phone
 155  * on the button.
 156
 157  Komunikate KIP1000 Keyboard Matrix
 158
 159      -> -- 1 -- 2 -- 3  --> GPI pin 4 (0x10)
 160       |    |    |    |
 161      <- -- 4 -- 5 -- 6  --> GPI pin 5 (0x20)
 162       |    |    |    |
 163      END - 7 -- 8 -- 9  --> GPI pin 6 (0x40)
 164       |    |    |    |
 165      OK -- * -- 0 -- #  --> GPI pin 7 (0x80)
 166       |    |    |    |
 167
 168      /|\  /|\  /|\  /|\
 169       |    |    |    |
 170 GPO
 171 pin:  3    2    1    0
 172      0x8  0x4  0x2  0x1
 173
 174  */
 175 static unsigned short keymap_kip1000(int scancode)
 176 {
 177         switch (scancode) {                             /* phone key:   */
 178         case 0x82: return KEY_NUMERIC_0;                /*   0          */
 179         case 0x14: return KEY_NUMERIC_1;                /*   1          */
 180         case 0x12: return KEY_NUMERIC_2;                /*   2          */
 181         case 0x11: return KEY_NUMERIC_3;                /*   3          */
 182         case 0x24: return KEY_NUMERIC_4;                /*   4          */
 183         case 0x22: return KEY_NUMERIC_5;                /*   5          */
 184         case 0x21: return KEY_NUMERIC_6;                /*   6          */
 185         case 0x44: return KEY_NUMERIC_7;                /*   7          */
 186         case 0x42: return KEY_NUMERIC_8;                /*   8          */
 187         case 0x41: return KEY_NUMERIC_9;                /*   9          */
 188         case 0x81: return KEY_NUMERIC_POUND;            /*   #          */
 189         case 0x84: return KEY_NUMERIC_STAR;             /*   *          */
 190         case 0x88: return KEY_ENTER;                    /*   pickup     */
 191         case 0x48: return KEY_ESC;                      /*   hangup     */
 192         case 0x28: return KEY_LEFT;                     /*   IN         */
 193         case 0x18: return KEY_RIGHT;                    /*   OUT        */
 194         default:   return special_keymap(scancode);
 195         }
 196 }
 197
 198 /*
 199   Contributed by Shaun Jackman <sjackman@gmail.com>
 200
 201   Genius G-Talk keyboard matrix
 202      0 1 2 3
 203   4: 0 4 8 Talk
 204   5: 1 5 9 End
 205   6: 2 6 # Up
 206   7: 3 7 * Down
 207 */
 208 static unsigned short keymap_gtalk(int scancode)
 209 {
 210         switch (scancode) {
 211         case 0x11: return KEY_NUMERIC_0;
 212         case 0x21: return KEY_NUMERIC_1;
 213         case 0x41: return KEY_NUMERIC_2;
 214         case 0x81: return KEY_NUMERIC_3;
 215         case 0x12: return KEY_NUMERIC_4;
 216         case 0x22: return KEY_NUMERIC_5;
 217         case 0x42: return KEY_NUMERIC_6;
 218         case 0x82: return KEY_NUMERIC_7;
 219         case 0x14: return KEY_NUMERIC_8;
 220         case 0x24: return KEY_NUMERIC_9;
 221         case 0x44: return KEY_NUMERIC_POUND;    /* # */
 222         case 0x84: return KEY_NUMERIC_STAR;     /* * */
 223         case 0x18: return KEY_ENTER;            /* Talk (green handset) */
 224         case 0x28: return KEY_ESC;              /* End (red handset) */
 225         case 0x48: return KEY_UP;               /* Menu up (rocker switch) */
 226         case 0x88: return KEY_DOWN;             /* Menu down (rocker switch) */
 227         default:   return special_keymap(scancode);
 228         }
 229 }
 230
 231 /*
 232  * Keymap for Allied-Telesis Corega USBPH01
 233  * http://www.alliedtelesis-corega.com/2/1344/1437/1360/chprd.html
 234  *
 235  * Contributed by july@nat.bg
 236  */
 237 static unsigned short keymap_usbph01(int scancode)
 238 {
 239         switch (scancode) {
 240         case 0x11: return KEY_NUMERIC_0;                /*   0          */
 241         case 0x21: return KEY_NUMERIC_1;                /*   1          */
 242         case 0x41: return KEY_NUMERIC_2;                /*   2          */
 243         case 0x81: return KEY_NUMERIC_3;                /*   3          */
 244         case 0x12: return KEY_NUMERIC_4;                /*   4          */
 245         case 0x22: return KEY_NUMERIC_5;                /*   5          */
 246         case 0x42: return KEY_NUMERIC_6;                /*   6          */
 247         case 0x82: return KEY_NUMERIC_7;                /*   7          */
 248         case 0x14: return KEY_NUMERIC_8;                /*   8          */
 249         case 0x24: return KEY_NUMERIC_9;                /*   9          */
 250         case 0x44: return KEY_NUMERIC_POUND;            /*   #          */
 251         case 0x84: return KEY_NUMERIC_STAR;             /*   *          */
 252         case 0x18: return KEY_ENTER;                    /*   pickup     */
 253         case 0x28: return KEY_ESC;                      /*   hangup     */
 254         case 0x48: return KEY_LEFT;                     /*   IN         */
 255         case 0x88: return KEY_RIGHT;                    /*   OUT        */
 256         default:   return special_keymap(scancode);
 257         }
 258 }
 259
 260 /*
 261  * Keymap for ATCom AU-100
 262  * http://www.atcom.cn/products.html
 263  * http://www.packetizer.com/products/au100/
 264  * http://www.voip-info.org/wiki/view/AU-100
 265  *
 266  * Contributed by daniel@gimpelevich.san-francisco.ca.us
 267  */
 268 static unsigned short keymap_atcom(int scancode)
 269 {
 270         switch (scancode) {                             /* phone key:   */
 271         case 0x82: return KEY_NUMERIC_0;                /*   0          */
 272         case 0x11: return KEY_NUMERIC_1;                /*   1          */
 273         case 0x12: return KEY_NUMERIC_2;                /*   2          */
 274         case 0x14: return KEY_NUMERIC_3;                /*   3          */
 275         case 0x21: return KEY_NUMERIC_4;                /*   4          */
 276         case 0x22: return KEY_NUMERIC_5;                /*   5          */
 277         case 0x24: return KEY_NUMERIC_6;                /*   6          */
 278         case 0x41: return KEY_NUMERIC_7;                /*   7          */
 279         case 0x42: return KEY_NUMERIC_8;                /*   8          */
 280         case 0x44: return KEY_NUMERIC_9;                /*   9          */
 281         case 0x84: return KEY_NUMERIC_POUND;            /*   #          */
 282         case 0x81: return KEY_NUMERIC_STAR;             /*   *          */
 283         case 0x18: return KEY_ENTER;                    /*   pickup     */
 284         case 0x28: return KEY_ESC;                      /*   hangup     */
 285         case 0x48: return KEY_LEFT;                     /* left arrow   */
 286         case 0x88: return KEY_RIGHT;                    /* right arrow  */
 287         default:   return special_keymap(scancode);
 288         }
 289 }
 290
 291 static unsigned short (*keymap)(int) = keymap_kip1000;
 292
 293 /*
 294  * Completes a request by converting the data into events for the
 295  * input subsystem.
 296  */
 297 static void report_key(struct cm109_dev *dev, int key)
 298 {
 299         struct input_dev *idev = dev->idev;
 300
 301         if (dev->key_code >= 0) {
 302                 /* old key up */
 303                 input_report_key(idev, dev->key_code, 0);
 304         }
 305
 306         dev->key_code = key;
 307         if (key >= 0) {
 308                 /* new valid key */
 309                 input_report_key(idev, key, 1);
 310         }
 311
 312         input_sync(idev);
 313 }
 314
 315 /*
 316  * Converts data of special key presses (volume, mute) into events
 317  * for the input subsystem, sends press-n-release for mute keys.
 318  */
 319 static void cm109_report_special(struct cm109_dev *dev)
 320 {
 321         static const u8 autorelease = RECORD_MUTE | PLAYBACK_MUTE;
 322         struct input_dev *idev = dev->idev;
 323         u8 data = dev->irq_data->byte[HID_IR0];
 324         unsigned short keycode;
 325         int i;
 326
 327         for (i = 0; i < 4; i++) {
 328                 keycode = dev->keymap[0xff + BIT(i)];
 329                 if (keycode == KEY_RESERVED)
 330                         continue;
 331
 332                 input_report_key(idev, keycode, data & BIT(i));
 333                 if (data & autorelease & BIT(i)) {
 334                         input_sync(idev);
 335                         input_report_key(idev, keycode, 0);
 336                 }
 337         }
 338         input_sync(idev);
 339 }
 340
 341 /******************************************************************************
 342  * CM109 usb communication interface
 343  *****************************************************************************/
 344
 345 static void cm109_submit_buzz_toggle(struct cm109_dev *dev)
 346 {
 347         int error;
 348
 349         if (dev->buzzer_state)
 350                 dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
 351         else
 352                 dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
 353
 354         error = usb_submit_urb(dev->urb_ctl, GFP_ATOMIC);
 355         if (error)
 356                 dev_err(&dev->intf->dev,
 357                         "%s: usb_submit_urb (urb_ctl) failed %d\n",
 358                         __func__, error);
 359 }
 360
 361 /*
 362  * IRQ handler
 363  */
 364 static void cm109_urb_irq_callback(struct urb *urb)
 365 {
 366         struct cm109_dev *dev = urb->context;
 367         const int status = urb->status;
 368         int error;
 369         unsigned long flags;
 370
 371         dev_dbg(&dev->intf->dev, "### URB IRQ: [0x%02x 0x%02x 0x%02x 0x%02x] keybit=0x%02x\n",
 372              dev->irq_data->byte[0],
 373              dev->irq_data->byte[1],
 374              dev->irq_data->byte[2],
 375              dev->irq_data->byte[3],
 376              dev->keybit);
 377
 378         if (status) {
 379                 if (status == -ESHUTDOWN)
 380                         return;
 381                 dev_err_ratelimited(&dev->intf->dev, "%s: urb status %d\n",
 382                                     __func__, status);
 383                 goto out;
 384         }
 385
 386         /* Special keys */
 387         cm109_report_special(dev);
 388
 389         /* Scan key column */
 390         if (dev->keybit == 0xf) {
 391
 392                 /* Any changes ? */
 393                 if ((dev->gpi & 0xf0) == (dev->irq_data->byte[HID_IR1] & 0xf0))
 394                         goto out;
 395
 396                 dev->gpi = dev->irq_data->byte[HID_IR1] & 0xf0;
 397                 dev->keybit = 0x1;
 398         } else {
 399                 report_key(dev, dev->keymap[dev->irq_data->byte[HID_IR1]]);
 400
 401                 dev->keybit <<= 1;
 402                 if (dev->keybit > 0x8)
 403                         dev->keybit = 0xf;
 404         }
 405
 406  out:
 407
 408         spin_lock_irqsave(&dev->ctl_submit_lock, flags);
 409
 410         dev->irq_urb_pending = 0;
 411
 412         if (likely(!dev->shutdown)) {
 413
 414                 if (dev->buzzer_state)
 415                         dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
 416                 else
 417                         dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
 418
 419                 dev->ctl_data->byte[HID_OR1] = dev->keybit;
 420                 dev->ctl_data->byte[HID_OR2] = dev->keybit;
 421
 422                 dev->buzzer_pending = 0;
 423                 dev->ctl_urb_pending = 1;
 424
 425                 error = usb_submit_urb(dev->urb_ctl, GFP_ATOMIC);
 426                 if (error)
 427                         dev_err(&dev->intf->dev,
 428                                 "%s: usb_submit_urb (urb_ctl) failed %d\n",
 429                                 __func__, error);
 430         }
 431
 432         spin_unlock_irqrestore(&dev->ctl_submit_lock, flags);
 433 }
 434
 435 static void cm109_urb_ctl_callback(struct urb *urb)
 436 {
 437         struct cm109_dev *dev = urb->context;
 438         const int status = urb->status;
 439         int error;
 440         unsigned long flags;
 441
 442         dev_dbg(&dev->intf->dev, "### URB CTL: [0x%02x 0x%02x 0x%02x 0x%02x]\n",
 443              dev->ctl_data->byte[0],
 444              dev->ctl_data->byte[1],
 445              dev->ctl_data->byte[2],
 446              dev->ctl_data->byte[3]);
 447
 448         if (status) {
 449                 if (status == -ESHUTDOWN)
 450                         return;
 451                 dev_err_ratelimited(&dev->intf->dev, "%s: urb status %d\n",
 452                                     __func__, status);
 453         }
 454
 455         spin_lock_irqsave(&dev->ctl_submit_lock, flags);
 456
 457         dev->ctl_urb_pending = 0;
 458
 459         if (likely(!dev->shutdown)) {
 460
 461                 if (dev->buzzer_pending || status) {
 462                         dev->buzzer_pending = 0;
 463                         dev->ctl_urb_pending = 1;
 464                         cm109_submit_buzz_toggle(dev);
 465                 } else if (likely(!dev->irq_urb_pending)) {
 466                         /* ask for key data */
 467                         dev->irq_urb_pending = 1;
 468                         error = usb_submit_urb(dev->urb_irq, GFP_ATOMIC);
 469                         if (error)
 470                                 dev_err(&dev->intf->dev,
 471                                         "%s: usb_submit_urb (urb_irq) failed %d\n",
 472                                         __func__, error);
 473                 }
 474         }
 475
 476         spin_unlock_irqrestore(&dev->ctl_submit_lock, flags);
 477 }
 478
 479 static void cm109_toggle_buzzer_async(struct cm109_dev *dev)
 480 {
 481         unsigned long flags;
 482
 483         spin_lock_irqsave(&dev->ctl_submit_lock, flags);
 484
 485         if (dev->ctl_urb_pending) {
 486                 /* URB completion will resubmit */
 487                 dev->buzzer_pending = 1;
 488         } else {
 489                 dev->ctl_urb_pending = 1;
 490                 cm109_submit_buzz_toggle(dev);
 491         }
 492
 493         spin_unlock_irqrestore(&dev->ctl_submit_lock, flags);
 494 }
 495
 496 static void cm109_toggle_buzzer_sync(struct cm109_dev *dev, int on)
 497 {
 498         int error;
 499
 500         if (on)
 501                 dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
 502         else
 503                 dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
 504
 505         error = usb_control_msg(dev->udev,
 506                                 usb_sndctrlpipe(dev->udev, 0),
 507                                 dev->ctl_req->bRequest,
 508                                 dev->ctl_req->bRequestType,
 509                                 le16_to_cpu(dev->ctl_req->wValue),
 510                                 le16_to_cpu(dev->ctl_req->wIndex),
 511                                 dev->ctl_data,
 512                                 USB_PKT_LEN, USB_CTRL_SET_TIMEOUT);
 513         if (error < 0 && error != -EINTR)
 514                 dev_err(&dev->intf->dev, "%s: usb_control_msg() failed %d\n",
 515                         __func__, error);
 516 }
 517
 518 static void cm109_stop_traffic(struct cm109_dev *dev)
 519 {
 520         dev->shutdown = 1;
 521         /*
 522          * Make sure other CPUs see this
 523          */
 524         smp_wmb();
 525
 526         usb_kill_urb(dev->urb_ctl);
 527         usb_kill_urb(dev->urb_irq);
 528
 529         cm109_toggle_buzzer_sync(dev, 0);
 530
 531         dev->shutdown = 0;
 532         smp_wmb();
 533 }
 534
 535 static void cm109_restore_state(struct cm109_dev *dev)
 536 {
 537         if (dev->open) {
 538                 /*
 539                  * Restore buzzer state.
 540                  * This will also kick regular URB submission
 541                  */
 542                 cm109_toggle_buzzer_async(dev);
 543         }
 544 }
 545
 546 /******************************************************************************
 547  * input event interface
 548  *****************************************************************************/
 549
 550 static int cm109_input_open(struct input_dev *idev)
 551 {
 552         struct cm109_dev *dev = input_get_drvdata(idev);
 553         int error;
 554
 555         error = usb_autopm_get_interface(dev->intf);
 556         if (error < 0) {
 557                 dev_err(&idev->dev, "%s - cannot autoresume, result %d\n",
 558                         __func__, error);
 559                 return error;
 560         }
 561
 562         mutex_lock(&dev->pm_mutex);
 563
 564         dev->buzzer_state = 0;
 565         dev->key_code = -1;     /* no keys pressed */
 566         dev->keybit = 0xf;
 567
 568         /* issue INIT */
 569         dev->ctl_data->byte[HID_OR0] = HID_OR_GPO_BUZ_SPDIF;
 570         dev->ctl_data->byte[HID_OR1] = dev->keybit;
 571         dev->ctl_data->byte[HID_OR2] = dev->keybit;
 572         dev->ctl_data->byte[HID_OR3] = 0x00;
 573
 574         dev->ctl_urb_pending = 1;
 575         error = usb_submit_urb(dev->urb_ctl, GFP_KERNEL);
 576         if (error) {
 577                 dev->ctl_urb_pending = 0;
 578                 dev_err(&dev->intf->dev, "%s: usb_submit_urb (urb_ctl) failed %d\n",
 579                         __func__, error);
 580         } else {
 581                 dev->open = 1;
 582         }
 583
 584         mutex_unlock(&dev->pm_mutex);
 585
 586         if (error)
 587                 usb_autopm_put_interface(dev->intf);
 588
 589         return error;
 590 }
 591
 592 static void cm109_input_close(struct input_dev *idev)
 593 {
 594         struct cm109_dev *dev = input_get_drvdata(idev);
 595
 596         mutex_lock(&dev->pm_mutex);
 597
 598         /*
 599          * Once we are here event delivery is stopped so we
 600          * don't need to worry about someone starting buzzer
 601          * again
 602          */
 603         cm109_stop_traffic(dev);
 604         dev->open = 0;
 605
 606         mutex_unlock(&dev->pm_mutex);
 607
 608         usb_autopm_put_interface(dev->intf);
 609 }
 610
 611 static int cm109_input_ev(struct input_dev *idev, unsigned int type,
 612                           unsigned int code, int value)
 613 {
 614         struct cm109_dev *dev = input_get_drvdata(idev);
 615
 616         dev_dbg(&dev->intf->dev,
 617                 "input_ev: type=%u code=%u value=%d\n", type, code, value);
 618
 619         if (type != EV_SND)
 620                 return -EINVAL;
 621
 622         switch (code) {
 623         case SND_TONE:
 624         case SND_BELL:
 625                 dev->buzzer_state = !!value;
 626                 if (!dev->resetting)
 627                         cm109_toggle_buzzer_async(dev);
 628                 return 0;
 629
 630         default:
 631                 return -EINVAL;
 632         }
 633 }
 634
 635
 636 /******************************************************************************
 637  * Linux interface and usb initialisation
 638  *****************************************************************************/
 639
 640 struct driver_info {
 641         char *name;
 642 };
 643
 644 static const struct driver_info info_cm109 = {
 645         .name = "CM109 USB driver",
 646 };
 647
 648 enum {
 649         VENDOR_ID        = 0x0d8c, /* C-Media Electronics */
 650         PRODUCT_ID_CM109 = 0x000e, /* CM109 defines range 0x0008 - 0x000f */
 651 };
 652
 653 /* table of devices that work with this driver */
 654 static const struct usb_device_id cm109_usb_table[] = {
 655         {
 656                 .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
 657                                 USB_DEVICE_ID_MATCH_INT_INFO,
 658                 .idVendor = VENDOR_ID,
 659                 .idProduct = PRODUCT_ID_CM109,
 660                 .bInterfaceClass = USB_CLASS_HID,
 661                 .bInterfaceSubClass = 0,
 662                 .bInterfaceProtocol = 0,
 663                 .driver_info = (kernel_ulong_t) &info_cm109
 664         },
 665         /* you can add more devices here with product ID 0x0008 - 0x000f */
 666         { }
 667 };
 668
 669 static void cm109_usb_cleanup(struct cm109_dev *dev)
 670 {
 671         kfree(dev->ctl_req);
 672         if (dev->ctl_data)
 673                 usb_free_coherent(dev->udev, USB_PKT_LEN,
 674                                   dev->ctl_data, dev->ctl_dma);
 675         if (dev->irq_data)
 676                 usb_free_coherent(dev->udev, USB_PKT_LEN,
 677                                   dev->irq_data, dev->irq_dma);
 678
 679         usb_free_urb(dev->urb_irq);     /* parameter validation in core/urb */
 680         usb_free_urb(dev->urb_ctl);     /* parameter validation in core/urb */
 681         kfree(dev);
 682 }
 683
 684 static void cm109_usb_disconnect(struct usb_interface *interface)
 685 {
 686         struct cm109_dev *dev = usb_get_intfdata(interface);
 687
 688         usb_set_intfdata(interface, NULL);
 689         input_unregister_device(dev->idev);
 690         cm109_usb_cleanup(dev);
 691 }
 692
 693 static int cm109_usb_probe(struct usb_interface *intf,
 694                            const struct usb_device_id *id)
 695 {
 696         struct usb_device *udev = interface_to_usbdev(intf);
 697         struct driver_info *nfo = (struct driver_info *)id->driver_info;
 698         struct usb_host_interface *interface;
 699         struct usb_endpoint_descriptor *endpoint;
 700         struct cm109_dev *dev;
 701         struct input_dev *input_dev = NULL;
 702         int ret, pipe, i;
 703         int error = -ENOMEM;
 704
 705         interface = intf->cur_altsetting;
 706
 707         if (interface->desc.bNumEndpoints < 1)
 708                 return -ENODEV;
 709
 710         endpoint = &interface->endpoint[0].desc;
 711
 712         if (!usb_endpoint_is_int_in(endpoint))
 713                 return -ENODEV;
 714
 715         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 716         if (!dev)
 717                 return -ENOMEM;
 718
 719         spin_lock_init(&dev->ctl_submit_lock);
 720         mutex_init(&dev->pm_mutex);
 721
 722         dev->udev = udev;
 723         dev->intf = intf;
 724
 725         dev->idev = input_dev = input_allocate_device();
 726         if (!input_dev)
 727                 goto err_out;
 728
 729         /* allocate usb buffers */
 730         dev->irq_data = usb_alloc_coherent(udev, USB_PKT_LEN,
 731                                            GFP_KERNEL, &dev->irq_dma);
 732         if (!dev->irq_data)
 733                 goto err_out;
 734
 735         dev->ctl_data = usb_alloc_coherent(udev, USB_PKT_LEN,
 736                                            GFP_KERNEL, &dev->ctl_dma);
 737         if (!dev->ctl_data)
 738                 goto err_out;
 739
 740         dev->ctl_req = kmalloc(sizeof(*(dev->ctl_req)), GFP_KERNEL);
 741         if (!dev->ctl_req)
 742                 goto err_out;
 743
 744         /* allocate urb structures */
 745         dev->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
 746         if (!dev->urb_irq)
 747                 goto err_out;
 748
 749         dev->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
 750         if (!dev->urb_ctl)
 751                 goto err_out;
 752
 753         /* get a handle to the interrupt data pipe */
 754         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
 755         ret = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 756         if (ret != USB_PKT_LEN)
 757                 dev_err(&intf->dev, "invalid payload size %d, expected %d\n",
 758                         ret, USB_PKT_LEN);
 759
 760         /* initialise irq urb */
 761         usb_fill_int_urb(dev->urb_irq, udev, pipe, dev->irq_data,
 762                          USB_PKT_LEN,
 763                          cm109_urb_irq_callback, dev, endpoint->bInterval);
 764         dev->urb_irq->transfer_dma = dev->irq_dma;
 765         dev->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 766         dev->urb_irq->dev = udev;
 767
 768         /* initialise ctl urb */
 769         dev->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
 770                                         USB_DIR_OUT;
 771         dev->ctl_req->bRequest = USB_REQ_SET_CONFIGURATION;
 772         dev->ctl_req->wValue = cpu_to_le16(0x200);
 773         dev->ctl_req->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
 774         dev->ctl_req->wLength = cpu_to_le16(USB_PKT_LEN);
 775
 776         usb_fill_control_urb(dev->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
 777                              (void *)dev->ctl_req, dev->ctl_data, USB_PKT_LEN,
 778                              cm109_urb_ctl_callback, dev);
 779         dev->urb_ctl->transfer_dma = dev->ctl_dma;
 780         dev->urb_ctl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 781         dev->urb_ctl->dev = udev;
 782
 783         /* find out the physical bus location */
 784         usb_make_path(udev, dev->phys, sizeof(dev->phys));
 785         strlcat(dev->phys, "/input0", sizeof(dev->phys));
 786
 787         /* register settings for the input device */
 788         input_dev->name = nfo->name;
 789         input_dev->phys = dev->phys;
 790         usb_to_input_id(udev, &input_dev->id);
 791         input_dev->dev.parent = &intf->dev;
 792
 793         input_set_drvdata(input_dev, dev);
 794         input_dev->open = cm109_input_open;
 795         input_dev->close = cm109_input_close;
 796         input_dev->event = cm109_input_ev;
 797
 798         input_dev->keycode = dev->keymap;
 799         input_dev->keycodesize = sizeof(unsigned char);
 800         input_dev->keycodemax = ARRAY_SIZE(dev->keymap);
 801
 802         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_SND);
 803         input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
 804
 805         /* register available key events */
 806         for (i = 0; i < KEYMAP_SIZE; i++) {
 807                 unsigned short k = keymap(i);
 808                 dev->keymap[i] = k;
 809                 __set_bit(k, input_dev->keybit);
 810         }
 811         __clear_bit(KEY_RESERVED, input_dev->keybit);
 812
 813         error = input_register_device(dev->idev);
 814         if (error)
 815                 goto err_out;
 816
 817         usb_set_intfdata(intf, dev);
 818
 819         return 0;
 820
 821  err_out:
 822         input_free_device(input_dev);
 823         cm109_usb_cleanup(dev);
 824         return error;
 825 }
 826
 827 static int cm109_usb_suspend(struct usb_interface *intf, pm_message_t message)
 828 {
 829         struct cm109_dev *dev = usb_get_intfdata(intf);
 830
 831         dev_info(&intf->dev, "cm109: usb_suspend (event=%d)\n", message.event);
 832
 833         mutex_lock(&dev->pm_mutex);
 834         cm109_stop_traffic(dev);
 835         mutex_unlock(&dev->pm_mutex);
 836
 837         return 0;
 838 }
 839
 840 static int cm109_usb_resume(struct usb_interface *intf)
 841 {
 842         struct cm109_dev *dev = usb_get_intfdata(intf);
 843
 844         dev_info(&intf->dev, "cm109: usb_resume\n");
 845
 846         mutex_lock(&dev->pm_mutex);
 847         cm109_restore_state(dev);
 848         mutex_unlock(&dev->pm_mutex);
 849
 850         return 0;
 851 }
 852
 853 static int cm109_usb_pre_reset(struct usb_interface *intf)
 854 {
 855         struct cm109_dev *dev = usb_get_intfdata(intf);
 856
 857         mutex_lock(&dev->pm_mutex);
 858
 859         /*
 860          * Make sure input events don't try to toggle buzzer
 861          * while we are resetting
 862          */
 863         dev->resetting = 1;
 864         smp_wmb();
 865
 866         cm109_stop_traffic(dev);
 867
 868         return 0;
 869 }
 870
 871 static int cm109_usb_post_reset(struct usb_interface *intf)
 872 {
 873         struct cm109_dev *dev = usb_get_intfdata(intf);
 874
 875         dev->resetting = 0;
 876         smp_wmb();
 877
 878         cm109_restore_state(dev);
 879
 880         mutex_unlock(&dev->pm_mutex);
 881
 882         return 0;
 883 }
 884
 885 static struct usb_driver cm109_driver = {
 886         .name           = "cm109",
 887         .probe          = cm109_usb_probe,
 888         .disconnect     = cm109_usb_disconnect,
 889         .suspend        = cm109_usb_suspend,
 890         .resume         = cm109_usb_resume,
 891         .reset_resume   = cm109_usb_resume,
 892         .pre_reset      = cm109_usb_pre_reset,
 893         .post_reset     = cm109_usb_post_reset,
 894         .id_table       = cm109_usb_table,
 895         .supports_autosuspend = 1,
 896 };
 897
 898 static int __init cm109_select_keymap(void)
 899 {
 900         /* Load the phone keymap */
 901         if (!strcasecmp(phone, "kip1000")) {
 902                 keymap = keymap_kip1000;
 903                 printk(KERN_INFO KBUILD_MODNAME ": "
 904                         "Keymap for Komunikate KIP1000 phone loaded\n");
 905         } else if (!strcasecmp(phone, "gtalk")) {
 906                 keymap = keymap_gtalk;
 907                 printk(KERN_INFO KBUILD_MODNAME ": "
 908                         "Keymap for Genius G-talk phone loaded\n");
 909         } else if (!strcasecmp(phone, "usbph01")) {
 910                 keymap = keymap_usbph01;
 911                 printk(KERN_INFO KBUILD_MODNAME ": "
 912                         "Keymap for Allied-Telesis Corega USBPH01 phone loaded\n");
 913         } else if (!strcasecmp(phone, "atcom")) {
 914                 keymap = keymap_atcom;
 915                 printk(KERN_INFO KBUILD_MODNAME ": "
 916                         "Keymap for ATCom AU-100 phone loaded\n");
 917         } else {
 918                 printk(KERN_ERR KBUILD_MODNAME ": "
 919                         "Unsupported phone: %s\n", phone);
 920                 return -EINVAL;
 921         }
 922
 923         return 0;
 924 }
 925
 926 static int __init cm109_init(void)
 927 {
 928         int err;
 929
 930         err = cm109_select_keymap();
 931         if (err)
 932                 return err;
 933
 934         err = usb_register(&cm109_driver);
 935         if (err)
 936                 return err;
 937
 938         printk(KERN_INFO KBUILD_MODNAME ": "
 939                 DRIVER_DESC ": " DRIVER_VERSION " (C) " DRIVER_AUTHOR "\n");
 940
 941         return 0;
 942 }
 943
 944 static void __exit cm109_exit(void)
 945 {
 946         usb_deregister(&cm109_driver);
 947 }
 948
 949 module_init(cm109_init);
 950 module_exit(cm109_exit);
 951
 952 MODULE_DEVICE_TABLE(usb, cm109_usb_table);
 953
 954 MODULE_AUTHOR(DRIVER_AUTHOR);
 955 MODULE_DESCRIPTION(DRIVER_DESC);
 956 MODULE_LICENSE("GPL");