drivers/bluetooth/ath3k.c

   1 /*
   2  * Copyright (c) 2008-2009 Atheros Communications Inc.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  */
  19
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/slab.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/device.h>
  28 #include <linux/firmware.h>
  29 #include <linux/usb.h>
  30 #include <net/bluetooth/bluetooth.h>
  31
  32 #define VERSION "1.0"
  33 #define ATH3K_FIRMWARE  "ath3k-1.fw"
  34
  35 #define ATH3K_DNLOAD                            0x01
  36 #define ATH3K_GETSTATE                          0x05
  37 #define ATH3K_SET_NORMAL_MODE                   0x07
  38 #define ATH3K_GETVERSION                        0x09
  39 #define USB_REG_SWITCH_VID_PID                  0x0a
  40
  41 #define ATH3K_MODE_MASK                         0x3F
  42 #define ATH3K_NORMAL_MODE                       0x0E
  43
  44 #define ATH3K_PATCH_UPDATE                      0x80
  45 #define ATH3K_SYSCFG_UPDATE                     0x40
  46
  47 #define ATH3K_XTAL_FREQ_26M                     0x00
  48 #define ATH3K_XTAL_FREQ_40M                     0x01
  49 #define ATH3K_XTAL_FREQ_19P2                    0x02
  50 #define ATH3K_NAME_LEN                          0xFF
  51
  52 struct ath3k_version {
  53         unsigned int    rom_version;
  54         unsigned int    build_version;
  55         unsigned int    ram_version;
  56         unsigned char   ref_clock;
  57         unsigned char   reserved[0x07];
  58 };
  59
  60 static struct usb_device_id ath3k_table[] = {
  61         /* Atheros AR3011 */
  62         { USB_DEVICE(0x0CF3, 0x3000) },
  63
  64         /* Atheros AR3011 with sflash firmware*/
  65         { USB_DEVICE(0x0CF3, 0x3002) },
  66         { USB_DEVICE(0x13d3, 0x3304) },
  67         { USB_DEVICE(0x0930, 0x0215) },
  68         { USB_DEVICE(0x0489, 0xE03D) },
  69
  70         /* Atheros AR9285 Malbec with sflash firmware */
  71         { USB_DEVICE(0x03F0, 0x311D) },
  72
  73         /* Atheros AR3012 with sflash firmware*/
  74         { USB_DEVICE(0x0CF3, 0x3004) },
  75         { USB_DEVICE(0x13d3, 0x3375) },
  76
  77         /* Atheros AR5BBU12 with sflash firmware */
  78         { USB_DEVICE(0x0489, 0xE02C) },
  79
  80         { }     /* Terminating entry */
  81 };
  82
  83 MODULE_DEVICE_TABLE(usb, ath3k_table);
  84
  85 #define BTUSB_ATH3012           0x80
  86 /* This table is to load patch and sysconfig files
  87  * for AR3012 */
  88 static struct usb_device_id ath3k_blist_tbl[] = {
  89
  90         /* Atheros AR3012 with sflash firmware*/
  91         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
  92         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
  93
  94         { }     /* Terminating entry */
  95 };
  96
  97 #define USB_REQ_DFU_DNLOAD      1
  98 #define BULK_SIZE               4096
  99 #define FW_HDR_SIZE             20
 100
 101 static int ath3k_load_firmware(struct usb_device *udev,
 102                                 const struct firmware *firmware)
 103 {
 104         u8 *send_buf;
 105         int err, pipe, len, size, sent = 0;
 106         int count = firmware->size;
 107
 108         BT_DBG("udev %p", udev);
 109
 110         pipe = usb_sndctrlpipe(udev, 0);
 111
 112         send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
 113         if (!send_buf) {
 114                 BT_ERR("Can't allocate memory chunk for firmware");
 115                 return -ENOMEM;
 116         }
 117
 118         memcpy(send_buf, firmware->data, 20);
 119         if ((err = usb_control_msg(udev, pipe,
 120                                 USB_REQ_DFU_DNLOAD,
 121                                 USB_TYPE_VENDOR, 0, 0,
 122                                 send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
 123                 BT_ERR("Can't change to loading configuration err");
 124                 goto error;
 125         }
 126         sent += 20;
 127         count -= 20;
 128
 129         while (count) {
 130                 size = min_t(uint, count, BULK_SIZE);
 131                 pipe = usb_sndbulkpipe(udev, 0x02);
 132                 memcpy(send_buf, firmware->data + sent, size);
 133
 134                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 135                                         &len, 3000);
 136
 137                 if (err || (len != size)) {
 138                         BT_ERR("Error in firmware loading err = %d,"
 139                                 "len = %d, size = %d", err, len, size);
 140                         goto error;
 141                 }
 142
 143                 sent  += size;
 144                 count -= size;
 145         }
 146
 147 error:
 148         kfree(send_buf);
 149         return err;
 150 }
 151
 152 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
 153 {
 154         int pipe = 0;
 155
 156         pipe = usb_rcvctrlpipe(udev, 0);
 157         return usb_control_msg(udev, pipe, ATH3K_GETSTATE,
 158                         USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 159                         state, 0x01, USB_CTRL_SET_TIMEOUT);
 160 }
 161
 162 static int ath3k_get_version(struct usb_device *udev,
 163                         struct ath3k_version *version)
 164 {
 165         int pipe = 0;
 166
 167         pipe = usb_rcvctrlpipe(udev, 0);
 168         return usb_control_msg(udev, pipe, ATH3K_GETVERSION,
 169                         USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, version,
 170                         sizeof(struct ath3k_version),
 171                         USB_CTRL_SET_TIMEOUT);
 172 }
 173
 174 static int ath3k_load_fwfile(struct usb_device *udev,
 175                 const struct firmware *firmware)
 176 {
 177         u8 *send_buf;
 178         int err, pipe, len, size, count, sent = 0;
 179         int ret;
 180
 181         count = firmware->size;
 182
 183         send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
 184         if (!send_buf) {
 185                 BT_ERR("Can't allocate memory chunk for firmware");
 186                 return -ENOMEM;
 187         }
 188
 189         size = min_t(uint, count, FW_HDR_SIZE);
 190         memcpy(send_buf, firmware->data, size);
 191
 192         pipe = usb_sndctrlpipe(udev, 0);
 193         ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
 194                         USB_TYPE_VENDOR, 0, 0, send_buf,
 195                         size, USB_CTRL_SET_TIMEOUT);
 196         if (ret < 0) {
 197                 BT_ERR("Can't change to loading configuration err");
 198                 kfree(send_buf);
 199                 return ret;
 200         }
 201
 202         sent += size;
 203         count -= size;
 204
 205         while (count) {
 206                 size = min_t(uint, count, BULK_SIZE);
 207                 pipe = usb_sndbulkpipe(udev, 0x02);
 208
 209                 memcpy(send_buf, firmware->data + sent, size);
 210
 211                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 212                                         &len, 3000);
 213                 if (err || (len != size)) {
 214                         BT_ERR("Error in firmware loading err = %d,"
 215                                 "len = %d, size = %d", err, len, size);
 216                         kfree(send_buf);
 217                         return err;
 218                 }
 219                 sent  += size;
 220                 count -= size;
 221         }
 222
 223         kfree(send_buf);
 224         return 0;
 225 }
 226
 227 static int ath3k_switch_pid(struct usb_device *udev)
 228 {
 229         int pipe = 0;
 230
 231         pipe = usb_sndctrlpipe(udev, 0);
 232         return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
 233                         USB_TYPE_VENDOR, 0, 0,
 234                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 235 }
 236
 237 static int ath3k_set_normal_mode(struct usb_device *udev)
 238 {
 239         unsigned char fw_state;
 240         int pipe = 0, ret;
 241
 242         ret = ath3k_get_state(udev, &fw_state);
 243         if (ret < 0) {
 244                 BT_ERR("Can't get state to change to normal mode err");
 245                 return ret;
 246         }
 247
 248         if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
 249                 BT_DBG("firmware was already in normal mode");
 250                 return 0;
 251         }
 252
 253         pipe = usb_sndctrlpipe(udev, 0);
 254         return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
 255                         USB_TYPE_VENDOR, 0, 0,
 256                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 257 }
 258
 259 static int ath3k_load_patch(struct usb_device *udev)
 260 {
 261         unsigned char fw_state;
 262         char filename[ATH3K_NAME_LEN] = {0};
 263         const struct firmware *firmware;
 264         struct ath3k_version fw_version, pt_version;
 265         int ret;
 266
 267         ret = ath3k_get_state(udev, &fw_state);
 268         if (ret < 0) {
 269                 BT_ERR("Can't get state to change to load ram patch err");
 270                 return ret;
 271         }
 272
 273         if (fw_state & ATH3K_PATCH_UPDATE) {
 274                 BT_DBG("Patch was already downloaded");
 275                 return 0;
 276         }
 277
 278         ret = ath3k_get_version(udev, &fw_version);
 279         if (ret < 0) {
 280                 BT_ERR("Can't get version to change to load ram patch err");
 281                 return ret;
 282         }
 283
 284         snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
 285                 fw_version.rom_version);
 286
 287         ret = request_firmware(&firmware, filename, &udev->dev);
 288         if (ret < 0) {
 289                 BT_ERR("Patch file not found %s", filename);
 290                 return ret;
 291         }
 292
 293         pt_version.rom_version = *(int *)(firmware->data + firmware->size - 8);
 294         pt_version.build_version = *(int *)
 295                 (firmware->data + firmware->size - 4);
 296
 297         if ((pt_version.rom_version != fw_version.rom_version) ||
 298                 (pt_version.build_version <= fw_version.build_version)) {
 299                 BT_ERR("Patch file version did not match with firmware");
 300                 release_firmware(firmware);
 301                 return -EINVAL;
 302         }
 303
 304         ret = ath3k_load_fwfile(udev, firmware);
 305         release_firmware(firmware);
 306
 307         return ret;
 308 }
 309
 310 static int ath3k_load_syscfg(struct usb_device *udev)
 311 {
 312         unsigned char fw_state;
 313         char filename[ATH3K_NAME_LEN] = {0};
 314         const struct firmware *firmware;
 315         struct ath3k_version fw_version;
 316         int clk_value, ret;
 317
 318         ret = ath3k_get_state(udev, &fw_state);
 319         if (ret < 0) {
 320                 BT_ERR("Can't get state to change to load configration err");
 321                 return -EBUSY;
 322         }
 323
 324         ret = ath3k_get_version(udev, &fw_version);
 325         if (ret < 0) {
 326                 BT_ERR("Can't get version to change to load ram patch err");
 327                 return ret;
 328         }
 329
 330         switch (fw_version.ref_clock) {
 331
 332         case ATH3K_XTAL_FREQ_26M:
 333                 clk_value = 26;
 334                 break;
 335         case ATH3K_XTAL_FREQ_40M:
 336                 clk_value = 40;
 337                 break;
 338         case ATH3K_XTAL_FREQ_19P2:
 339                 clk_value = 19;
 340                 break;
 341         default:
 342                 clk_value = 0;
 343                 break;
 344         }
 345
 346         snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
 347                 fw_version.rom_version, clk_value, ".dfu");
 348
 349         ret = request_firmware(&firmware, filename, &udev->dev);
 350         if (ret < 0) {
 351                 BT_ERR("Configuration file not found %s", filename);
 352                 return ret;
 353         }
 354
 355         ret = ath3k_load_fwfile(udev, firmware);
 356         release_firmware(firmware);
 357
 358         return ret;
 359 }
 360
 361 static int ath3k_probe(struct usb_interface *intf,
 362                         const struct usb_device_id *id)
 363 {
 364         const struct firmware *firmware;
 365         struct usb_device *udev = interface_to_usbdev(intf);
 366         int ret;
 367
 368         BT_DBG("intf %p id %p", intf, id);
 369
 370         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 371                 return -ENODEV;
 372
 373         /* match device ID in ath3k blacklist table */
 374         if (!id->driver_info) {
 375                 const struct usb_device_id *match;
 376                 match = usb_match_id(intf, ath3k_blist_tbl);
 377                 if (match)
 378                         id = match;
 379         }
 380
 381         /* load patch and sysconfig files for AR3012 */
 382         if (id->driver_info & BTUSB_ATH3012) {
 383
 384                 /* New firmware with patch and sysconfig files already loaded */
 385                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
 386                         return -ENODEV;
 387
 388                 ret = ath3k_load_patch(udev);
 389                 if (ret < 0) {
 390                         BT_ERR("Loading patch file failed");
 391                         return ret;
 392                 }
 393                 ret = ath3k_load_syscfg(udev);
 394                 if (ret < 0) {
 395                         BT_ERR("Loading sysconfig file failed");
 396                         return ret;
 397                 }
 398                 ret = ath3k_set_normal_mode(udev);
 399                 if (ret < 0) {
 400                         BT_ERR("Set normal mode failed");
 401                         return ret;
 402                 }
 403                 ath3k_switch_pid(udev);
 404                 return 0;
 405         }
 406
 407         ret = request_firmware(&firmware, ATH3K_FIRMWARE, &udev->dev);
 408         if (ret < 0) {
 409                 if (ret == -ENOENT)
 410                         BT_ERR("Firmware file \"%s\" not found",
 411                                                         ATH3K_FIRMWARE);
 412                 else
 413                         BT_ERR("Firmware file \"%s\" request failed (err=%d)",
 414                                                         ATH3K_FIRMWARE, ret);
 415                 return ret;
 416         }
 417
 418         ret = ath3k_load_firmware(udev, firmware);
 419         release_firmware(firmware);
 420
 421         return ret;
 422 }
 423
 424 static void ath3k_disconnect(struct usb_interface *intf)
 425 {
 426         BT_DBG("ath3k_disconnect intf %p", intf);
 427 }
 428
 429 static struct usb_driver ath3k_driver = {
 430         .name           = "ath3k",
 431         .probe          = ath3k_probe,
 432         .disconnect     = ath3k_disconnect,
 433         .id_table       = ath3k_table,
 434 };
 435
 436 module_usb_driver(ath3k_driver);
 437
 438 MODULE_AUTHOR("Atheros Communications");
 439 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 440 MODULE_VERSION(VERSION);
 441 MODULE_LICENSE("GPL");
 442 MODULE_FIRMWARE(ATH3K_FIRMWARE);