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
  34 #define ATH3K_DNLOAD                            0x01
  35 #define ATH3K_GETSTATE                          0x05
  36 #define ATH3K_SET_NORMAL_MODE                   0x07
  37 #define ATH3K_GETVERSION                        0x09
  38 #define USB_REG_SWITCH_VID_PID                  0x0a
  39
  40 #define ATH3K_MODE_MASK                         0x3F
  41 #define ATH3K_NORMAL_MODE                       0x0E
  42
  43 #define ATH3K_PATCH_UPDATE                      0x80
  44 #define ATH3K_SYSCFG_UPDATE                     0x40
  45
  46 #define ATH3K_XTAL_FREQ_26M                     0x00
  47 #define ATH3K_XTAL_FREQ_40M                     0x01
  48 #define ATH3K_XTAL_FREQ_19P2                    0x02
  49 #define ATH3K_NAME_LEN                          0xFF
  50
  51 struct ath3k_version {
  52         unsigned int    rom_version;
  53         unsigned int    build_version;
  54         unsigned int    ram_version;
  55         unsigned char   ref_clock;
  56         unsigned char   reserved[0x07];
  57 };
  58
  59 static struct usb_device_id ath3k_table[] = {
  60         /* Atheros AR3011 */
  61         { USB_DEVICE(0x0CF3, 0x3000) },
  62
  63         /* Atheros AR3011 with sflash firmware*/
  64         { USB_DEVICE(0x0CF3, 0x3002) },
  65
  66         /* Atheros AR9285 Malbec with sflash firmware */
  67         { USB_DEVICE(0x03F0, 0x311D) },
  68
  69         /* Atheros AR3012 with sflash firmware*/
  70         { USB_DEVICE(0x0CF3, 0x3004) },
  71
  72         { }     /* Terminating entry */
  73 };
  74
  75 MODULE_DEVICE_TABLE(usb, ath3k_table);
  76
  77 #define BTUSB_ATH3012           0x80
  78 /* This table is to load patch and sysconfig files
  79  * for AR3012 */
  80 static struct usb_device_id ath3k_blist_tbl[] = {
  81
  82         /* Atheros AR3012 with sflash firmware*/
  83         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
  84
  85         { }     /* Terminating entry */
  86 };
  87
  88 #define USB_REQ_DFU_DNLOAD      1
  89 #define BULK_SIZE               4096
  90 #define FW_HDR_SIZE             20
  91
  92 static int ath3k_load_firmware(struct usb_device *udev,
  93                                 const struct firmware *firmware)
  94 {
  95         u8 *send_buf;
  96         int err, pipe, len, size, sent = 0;
  97         int count = firmware->size;
  98
  99         BT_DBG("udev %p", udev);
 100
 101         pipe = usb_sndctrlpipe(udev, 0);
 102
 103         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
 104         if (!send_buf) {
 105                 BT_ERR("Can't allocate memory chunk for firmware");
 106                 return -ENOMEM;
 107         }
 108
 109         memcpy(send_buf, firmware->data, 20);
 110         if ((err = usb_control_msg(udev, pipe,
 111                                 USB_REQ_DFU_DNLOAD,
 112                                 USB_TYPE_VENDOR, 0, 0,
 113                                 send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
 114                 BT_ERR("Can't change to loading configuration err");
 115                 goto error;
 116         }
 117         sent += 20;
 118         count -= 20;
 119
 120         while (count) {
 121                 size = min_t(uint, count, BULK_SIZE);
 122                 pipe = usb_sndbulkpipe(udev, 0x02);
 123                 memcpy(send_buf, firmware->data + sent, size);
 124
 125                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 126                                         &len, 3000);
 127
 128                 if (err || (len != size)) {
 129                         BT_ERR("Error in firmware loading err = %d,"
 130                                 "len = %d, size = %d", err, len, size);
 131                         goto error;
 132                 }
 133
 134                 sent  += size;
 135                 count -= size;
 136         }
 137
 138         kfree(send_buf);
 139         return 0;
 140
 141 error:
 142         kfree(send_buf);
 143         return err;
 144 }
 145
 146 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
 147 {
 148         int pipe = 0;
 149
 150         pipe = usb_rcvctrlpipe(udev, 0);
 151         return usb_control_msg(udev, pipe, ATH3K_GETSTATE,
 152                         USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 153                         state, 0x01, USB_CTRL_SET_TIMEOUT);
 154 }
 155
 156 static int ath3k_get_version(struct usb_device *udev,
 157                         struct ath3k_version *version)
 158 {
 159         int pipe = 0;
 160
 161         pipe = usb_rcvctrlpipe(udev, 0);
 162         return usb_control_msg(udev, pipe, ATH3K_GETVERSION,
 163                         USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, version,
 164                         sizeof(struct ath3k_version),
 165                         USB_CTRL_SET_TIMEOUT);
 166 }
 167
 168 static int ath3k_load_fwfile(struct usb_device *udev,
 169                 const struct firmware *firmware)
 170 {
 171         u8 *send_buf;
 172         int err, pipe, len, size, count, sent = 0;
 173         int ret;
 174
 175         count = firmware->size;
 176
 177         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
 178         if (!send_buf) {
 179                 BT_ERR("Can't allocate memory chunk for firmware");
 180                 return -ENOMEM;
 181         }
 182
 183         size = min_t(uint, count, FW_HDR_SIZE);
 184         memcpy(send_buf, firmware->data, size);
 185
 186         pipe = usb_sndctrlpipe(udev, 0);
 187         ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
 188                         USB_TYPE_VENDOR, 0, 0, send_buf,
 189                         size, USB_CTRL_SET_TIMEOUT);
 190         if (ret < 0) {
 191                 BT_ERR("Can't change to loading configuration err");
 192                 kfree(send_buf);
 193                 return ret;
 194         }
 195
 196         sent += size;
 197         count -= size;
 198
 199         while (count) {
 200                 size = min_t(uint, count, BULK_SIZE);
 201                 pipe = usb_sndbulkpipe(udev, 0x02);
 202
 203                 memcpy(send_buf, firmware->data + sent, size);
 204
 205                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 206                                         &len, 3000);
 207                 if (err || (len != size)) {
 208                         BT_ERR("Error in firmware loading err = %d,"
 209                                 "len = %d, size = %d", err, len, size);
 210                         kfree(send_buf);
 211                         return err;
 212                 }
 213                 sent  += size;
 214                 count -= size;
 215         }
 216
 217         kfree(send_buf);
 218         return 0;
 219 }
 220
 221 static int ath3k_switch_pid(struct usb_device *udev)
 222 {
 223         int pipe = 0;
 224
 225         pipe = usb_sndctrlpipe(udev, 0);
 226         return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
 227                         USB_TYPE_VENDOR, 0, 0,
 228                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 229 }
 230
 231 static int ath3k_set_normal_mode(struct usb_device *udev)
 232 {
 233         unsigned char fw_state;
 234         int pipe = 0, ret;
 235
 236         ret = ath3k_get_state(udev, &fw_state);
 237         if (ret < 0) {
 238                 BT_ERR("Can't get state to change to normal mode err");
 239                 return ret;
 240         }
 241
 242         if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
 243                 BT_DBG("firmware was already in normal mode");
 244                 return 0;
 245         }
 246
 247         pipe = usb_sndctrlpipe(udev, 0);
 248         return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
 249                         USB_TYPE_VENDOR, 0, 0,
 250                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 251 }
 252
 253 static int ath3k_load_patch(struct usb_device *udev)
 254 {
 255         unsigned char fw_state;
 256         char filename[ATH3K_NAME_LEN] = {0};
 257         const struct firmware *firmware;
 258         struct ath3k_version fw_version, pt_version;
 259         int ret;
 260
 261         ret = ath3k_get_state(udev, &fw_state);
 262         if (ret < 0) {
 263                 BT_ERR("Can't get state to change to load ram patch err");
 264                 return ret;
 265         }
 266
 267         if (fw_state & ATH3K_PATCH_UPDATE) {
 268                 BT_DBG("Patch was already downloaded");
 269                 return 0;
 270         }
 271
 272         ret = ath3k_get_version(udev, &fw_version);
 273         if (ret < 0) {
 274                 BT_ERR("Can't get version to change to load ram patch err");
 275                 return ret;
 276         }
 277
 278         snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
 279                 fw_version.rom_version);
 280
 281         ret = request_firmware(&firmware, filename, &udev->dev);
 282         if (ret < 0) {
 283                 BT_ERR("Patch file not found %s", filename);
 284                 return ret;
 285         }
 286
 287         pt_version.rom_version = *(int *)(firmware->data + firmware->size - 8);
 288         pt_version.build_version = *(int *)
 289                 (firmware->data + firmware->size - 4);
 290
 291         if ((pt_version.rom_version != fw_version.rom_version) ||
 292                 (pt_version.build_version <= fw_version.build_version)) {
 293                 BT_ERR("Patch file version did not match with firmware");
 294                 release_firmware(firmware);
 295                 return -EINVAL;
 296         }
 297
 298         ret = ath3k_load_fwfile(udev, firmware);
 299         release_firmware(firmware);
 300
 301         return ret;
 302 }
 303
 304 static int ath3k_load_syscfg(struct usb_device *udev)
 305 {
 306         unsigned char fw_state;
 307         char filename[ATH3K_NAME_LEN] = {0};
 308         const struct firmware *firmware;
 309         struct ath3k_version fw_version;
 310         int clk_value, ret;
 311
 312         ret = ath3k_get_state(udev, &fw_state);
 313         if (ret < 0) {
 314                 BT_ERR("Can't get state to change to load configration err");
 315                 return -EBUSY;
 316         }
 317
 318         ret = ath3k_get_version(udev, &fw_version);
 319         if (ret < 0) {
 320                 BT_ERR("Can't get version to change to load ram patch err");
 321                 return ret;
 322         }
 323
 324         switch (fw_version.ref_clock) {
 325
 326         case ATH3K_XTAL_FREQ_26M:
 327                 clk_value = 26;
 328                 break;
 329         case ATH3K_XTAL_FREQ_40M:
 330                 clk_value = 40;
 331                 break;
 332         case ATH3K_XTAL_FREQ_19P2:
 333                 clk_value = 19;
 334                 break;
 335         default:
 336                 clk_value = 0;
 337                 break;
 338         }
 339
 340         snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
 341                 fw_version.rom_version, clk_value, ".dfu");
 342
 343         ret = request_firmware(&firmware, filename, &udev->dev);
 344         if (ret < 0) {
 345                 BT_ERR("Configuration file not found %s", filename);
 346                 return ret;
 347         }
 348
 349         ret = ath3k_load_fwfile(udev, firmware);
 350         release_firmware(firmware);
 351
 352         return ret;
 353 }
 354
 355 static int ath3k_probe(struct usb_interface *intf,
 356                         const struct usb_device_id *id)
 357 {
 358         const struct firmware *firmware;
 359         struct usb_device *udev = interface_to_usbdev(intf);
 360         int ret;
 361
 362         BT_DBG("intf %p id %p", intf, id);
 363
 364         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 365                 return -ENODEV;
 366
 367         /* match device ID in ath3k blacklist table */
 368         if (!id->driver_info) {
 369                 const struct usb_device_id *match;
 370                 match = usb_match_id(intf, ath3k_blist_tbl);
 371                 if (match)
 372                         id = match;
 373         }
 374
 375         /* load patch and sysconfig files for AR3012 */
 376         if (id->driver_info & BTUSB_ATH3012) {
 377                 ret = ath3k_load_patch(udev);
 378                 if (ret < 0) {
 379                         BT_ERR("Loading patch file failed");
 380                         return ret;
 381                 }
 382                 ret = ath3k_load_syscfg(udev);
 383                 if (ret < 0) {
 384                         BT_ERR("Loading sysconfig file failed");
 385                         return ret;
 386                 }
 387                 ret = ath3k_set_normal_mode(udev);
 388                 if (ret < 0) {
 389                         BT_ERR("Set normal mode failed");
 390                         return ret;
 391                 }
 392                 ath3k_switch_pid(udev);
 393                 return 0;
 394         }
 395
 396         if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
 397                 BT_ERR("Error loading firmware");
 398                 return -EIO;
 399         }
 400
 401         ret = ath3k_load_firmware(udev, firmware);
 402         release_firmware(firmware);
 403
 404         return ret;
 405 }
 406
 407 static void ath3k_disconnect(struct usb_interface *intf)
 408 {
 409         BT_DBG("ath3k_disconnect intf %p", intf);
 410 }
 411
 412 static struct usb_driver ath3k_driver = {
 413         .name           = "ath3k",
 414         .probe          = ath3k_probe,
 415         .disconnect     = ath3k_disconnect,
 416         .id_table       = ath3k_table,
 417 };
 418
 419 static int __init ath3k_init(void)
 420 {
 421         BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
 422         return usb_register(&ath3k_driver);
 423 }
 424
 425 static void __exit ath3k_exit(void)
 426 {
 427         usb_deregister(&ath3k_driver);
 428 }
 429
 430 module_init(ath3k_init);
 431 module_exit(ath3k_exit);
 432
 433 MODULE_AUTHOR("Atheros Communications");
 434 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 435 MODULE_VERSION(VERSION);
 436 MODULE_LICENSE("GPL");
 437 MODULE_FIRMWARE("ath3k-1.fw");