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         /* Atheros AR5BBU12 with sflash firmware */
  73         { USB_DEVICE(0x0489, 0xE02C) },
  74
  75         { }     /* Terminating entry */
  76 };
  77
  78 MODULE_DEVICE_TABLE(usb, ath3k_table);
  79
  80 #define BTUSB_ATH3012           0x80
  81 /* This table is to load patch and sysconfig files
  82  * for AR3012 */
  83 static struct usb_device_id ath3k_blist_tbl[] = {
  84
  85         /* Atheros AR3012 with sflash firmware*/
  86         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
  87
  88         { }     /* Terminating entry */
  89 };
  90
  91 #define USB_REQ_DFU_DNLOAD      1
  92 #define BULK_SIZE               4096
  93 #define FW_HDR_SIZE             20
  94
  95 static int ath3k_load_firmware(struct usb_device *udev,
  96                                 const struct firmware *firmware)
  97 {
  98         u8 *send_buf;
  99         int err, pipe, len, size, sent = 0;
 100         int count = firmware->size;
 101
 102         BT_DBG("udev %p", udev);
 103
 104         pipe = usb_sndctrlpipe(udev, 0);
 105
 106         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
 107         if (!send_buf) {
 108                 BT_ERR("Can't allocate memory chunk for firmware");
 109                 return -ENOMEM;
 110         }
 111
 112         memcpy(send_buf, firmware->data, 20);
 113         if ((err = usb_control_msg(udev, pipe,
 114                                 USB_REQ_DFU_DNLOAD,
 115                                 USB_TYPE_VENDOR, 0, 0,
 116                                 send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
 117                 BT_ERR("Can't change to loading configuration err");
 118                 goto error;
 119         }
 120         sent += 20;
 121         count -= 20;
 122
 123         while (count) {
 124                 size = min_t(uint, count, BULK_SIZE);
 125                 pipe = usb_sndbulkpipe(udev, 0x02);
 126                 memcpy(send_buf, firmware->data + sent, size);
 127
 128                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 129                                         &len, 3000);
 130
 131                 if (err || (len != size)) {
 132                         BT_ERR("Error in firmware loading err = %d,"
 133                                 "len = %d, size = %d", err, len, size);
 134                         goto error;
 135                 }
 136
 137                 sent  += size;
 138                 count -= size;
 139         }
 140
 141         kfree(send_buf);
 142         return 0;
 143
 144 error:
 145         kfree(send_buf);
 146         return err;
 147 }
 148
 149 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
 150 {
 151         int pipe = 0;
 152
 153         pipe = usb_rcvctrlpipe(udev, 0);
 154         return usb_control_msg(udev, pipe, ATH3K_GETSTATE,
 155                         USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 156                         state, 0x01, USB_CTRL_SET_TIMEOUT);
 157 }
 158
 159 static int ath3k_get_version(struct usb_device *udev,
 160                         struct ath3k_version *version)
 161 {
 162         int pipe = 0;
 163
 164         pipe = usb_rcvctrlpipe(udev, 0);
 165         return usb_control_msg(udev, pipe, ATH3K_GETVERSION,
 166                         USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, version,
 167                         sizeof(struct ath3k_version),
 168                         USB_CTRL_SET_TIMEOUT);
 169 }
 170
 171 static int ath3k_load_fwfile(struct usb_device *udev,
 172                 const struct firmware *firmware)
 173 {
 174         u8 *send_buf;
 175         int err, pipe, len, size, count, sent = 0;
 176         int ret;
 177
 178         count = firmware->size;
 179
 180         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
 181         if (!send_buf) {
 182                 BT_ERR("Can't allocate memory chunk for firmware");
 183                 return -ENOMEM;
 184         }
 185
 186         size = min_t(uint, count, FW_HDR_SIZE);
 187         memcpy(send_buf, firmware->data, size);
 188
 189         pipe = usb_sndctrlpipe(udev, 0);
 190         ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
 191                         USB_TYPE_VENDOR, 0, 0, send_buf,
 192                         size, USB_CTRL_SET_TIMEOUT);
 193         if (ret < 0) {
 194                 BT_ERR("Can't change to loading configuration err");
 195                 kfree(send_buf);
 196                 return ret;
 197         }
 198
 199         sent += size;
 200         count -= size;
 201
 202         while (count) {
 203                 size = min_t(uint, count, BULK_SIZE);
 204                 pipe = usb_sndbulkpipe(udev, 0x02);
 205
 206                 memcpy(send_buf, firmware->data + sent, size);
 207
 208                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 209                                         &len, 3000);
 210                 if (err || (len != size)) {
 211                         BT_ERR("Error in firmware loading err = %d,"
 212                                 "len = %d, size = %d", err, len, size);
 213                         kfree(send_buf);
 214                         return err;
 215                 }
 216                 sent  += size;
 217                 count -= size;
 218         }
 219
 220         kfree(send_buf);
 221         return 0;
 222 }
 223
 224 static int ath3k_switch_pid(struct usb_device *udev)
 225 {
 226         int pipe = 0;
 227
 228         pipe = usb_sndctrlpipe(udev, 0);
 229         return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
 230                         USB_TYPE_VENDOR, 0, 0,
 231                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 232 }
 233
 234 static int ath3k_set_normal_mode(struct usb_device *udev)
 235 {
 236         unsigned char fw_state;
 237         int pipe = 0, ret;
 238
 239         ret = ath3k_get_state(udev, &fw_state);
 240         if (ret < 0) {
 241                 BT_ERR("Can't get state to change to normal mode err");
 242                 return ret;
 243         }
 244
 245         if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
 246                 BT_DBG("firmware was already in normal mode");
 247                 return 0;
 248         }
 249
 250         pipe = usb_sndctrlpipe(udev, 0);
 251         return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
 252                         USB_TYPE_VENDOR, 0, 0,
 253                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 254 }
 255
 256 static int ath3k_load_patch(struct usb_device *udev)
 257 {
 258         unsigned char fw_state;
 259         char filename[ATH3K_NAME_LEN] = {0};
 260         const struct firmware *firmware;
 261         struct ath3k_version fw_version, pt_version;
 262         int ret;
 263
 264         ret = ath3k_get_state(udev, &fw_state);
 265         if (ret < 0) {
 266                 BT_ERR("Can't get state to change to load ram patch err");
 267                 return ret;
 268         }
 269
 270         if (fw_state & ATH3K_PATCH_UPDATE) {
 271                 BT_DBG("Patch was already downloaded");
 272                 return 0;
 273         }
 274
 275         ret = ath3k_get_version(udev, &fw_version);
 276         if (ret < 0) {
 277                 BT_ERR("Can't get version to change to load ram patch err");
 278                 return ret;
 279         }
 280
 281         snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
 282                 fw_version.rom_version);
 283
 284         ret = request_firmware(&firmware, filename, &udev->dev);
 285         if (ret < 0) {
 286                 BT_ERR("Patch file not found %s", filename);
 287                 return ret;
 288         }
 289
 290         pt_version.rom_version = *(int *)(firmware->data + firmware->size - 8);
 291         pt_version.build_version = *(int *)
 292                 (firmware->data + firmware->size - 4);
 293
 294         if ((pt_version.rom_version != fw_version.rom_version) ||
 295                 (pt_version.build_version <= fw_version.build_version)) {
 296                 BT_ERR("Patch file version did not match with firmware");
 297                 release_firmware(firmware);
 298                 return -EINVAL;
 299         }
 300
 301         ret = ath3k_load_fwfile(udev, firmware);
 302         release_firmware(firmware);
 303
 304         return ret;
 305 }
 306
 307 static int ath3k_load_syscfg(struct usb_device *udev)
 308 {
 309         unsigned char fw_state;
 310         char filename[ATH3K_NAME_LEN] = {0};
 311         const struct firmware *firmware;
 312         struct ath3k_version fw_version;
 313         int clk_value, ret;
 314
 315         ret = ath3k_get_state(udev, &fw_state);
 316         if (ret < 0) {
 317                 BT_ERR("Can't get state to change to load configration err");
 318                 return -EBUSY;
 319         }
 320
 321         ret = ath3k_get_version(udev, &fw_version);
 322         if (ret < 0) {
 323                 BT_ERR("Can't get version to change to load ram patch err");
 324                 return ret;
 325         }
 326
 327         switch (fw_version.ref_clock) {
 328
 329         case ATH3K_XTAL_FREQ_26M:
 330                 clk_value = 26;
 331                 break;
 332         case ATH3K_XTAL_FREQ_40M:
 333                 clk_value = 40;
 334                 break;
 335         case ATH3K_XTAL_FREQ_19P2:
 336                 clk_value = 19;
 337                 break;
 338         default:
 339                 clk_value = 0;
 340                 break;
 341         }
 342
 343         snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
 344                 fw_version.rom_version, clk_value, ".dfu");
 345
 346         ret = request_firmware(&firmware, filename, &udev->dev);
 347         if (ret < 0) {
 348                 BT_ERR("Configuration file not found %s", filename);
 349                 return ret;
 350         }
 351
 352         ret = ath3k_load_fwfile(udev, firmware);
 353         release_firmware(firmware);
 354
 355         return ret;
 356 }
 357
 358 static int ath3k_probe(struct usb_interface *intf,
 359                         const struct usb_device_id *id)
 360 {
 361         const struct firmware *firmware;
 362         struct usb_device *udev = interface_to_usbdev(intf);
 363         int ret;
 364
 365         BT_DBG("intf %p id %p", intf, id);
 366
 367         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 368                 return -ENODEV;
 369
 370         /* match device ID in ath3k blacklist table */
 371         if (!id->driver_info) {
 372                 const struct usb_device_id *match;
 373                 match = usb_match_id(intf, ath3k_blist_tbl);
 374                 if (match)
 375                         id = match;
 376         }
 377
 378         /* load patch and sysconfig files for AR3012 */
 379         if (id->driver_info & BTUSB_ATH3012) {
 380                 ret = ath3k_load_patch(udev);
 381                 if (ret < 0) {
 382                         BT_ERR("Loading patch file failed");
 383                         return ret;
 384                 }
 385                 ret = ath3k_load_syscfg(udev);
 386                 if (ret < 0) {
 387                         BT_ERR("Loading sysconfig file failed");
 388                         return ret;
 389                 }
 390                 ret = ath3k_set_normal_mode(udev);
 391                 if (ret < 0) {
 392                         BT_ERR("Set normal mode failed");
 393                         return ret;
 394                 }
 395                 ath3k_switch_pid(udev);
 396                 return 0;
 397         }
 398
 399         if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
 400                 BT_ERR("Error loading firmware");
 401                 return -EIO;
 402         }
 403
 404         ret = ath3k_load_firmware(udev, firmware);
 405         release_firmware(firmware);
 406
 407         return ret;
 408 }
 409
 410 static void ath3k_disconnect(struct usb_interface *intf)
 411 {
 412         BT_DBG("ath3k_disconnect intf %p", intf);
 413 }
 414
 415 static struct usb_driver ath3k_driver = {
 416         .name           = "ath3k",
 417         .probe          = ath3k_probe,
 418         .disconnect     = ath3k_disconnect,
 419         .id_table       = ath3k_table,
 420 };
 421
 422 static int __init ath3k_init(void)
 423 {
 424         BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
 425         return usb_register(&ath3k_driver);
 426 }
 427
 428 static void __exit ath3k_exit(void)
 429 {
 430         usb_deregister(&ath3k_driver);
 431 }
 432
 433 module_init(ath3k_init);
 434 module_exit(ath3k_exit);
 435
 436 MODULE_AUTHOR("Atheros Communications");
 437 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 438 MODULE_VERSION(VERSION);
 439 MODULE_LICENSE("GPL");
 440 MODULE_FIRMWARE("ath3k-1.fw");