Marcel Holtmann | 48f0ed1 | 2015-04-06 00:52:11 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Bluetooth support for Intel devices |
| 4 | * |
| 5 | * Copyright (C) 2015 Intel Corporation |
| 6 | * |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <linux/module.h> |
Loic Poulain | 145f236 | 2015-09-04 17:54:34 +0200 | [diff] [blame] | 25 | #include <linux/firmware.h> |
Loic Poulain | d06f107 | 2015-10-01 18:16:21 +0200 | [diff] [blame] | 26 | #include <linux/regmap.h> |
Marcel Holtmann | 48f0ed1 | 2015-04-06 00:52:11 -0700 | [diff] [blame] | 27 | |
| 28 | #include <net/bluetooth/bluetooth.h> |
| 29 | #include <net/bluetooth/hci_core.h> |
| 30 | |
| 31 | #include "btintel.h" |
| 32 | |
| 33 | #define VERSION "0.1" |
| 34 | |
| 35 | #define BDADDR_INTEL (&(bdaddr_t) {{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}}) |
| 36 | |
| 37 | int btintel_check_bdaddr(struct hci_dev *hdev) |
| 38 | { |
| 39 | struct hci_rp_read_bd_addr *bda; |
| 40 | struct sk_buff *skb; |
| 41 | |
| 42 | skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL, |
| 43 | HCI_INIT_TIMEOUT); |
| 44 | if (IS_ERR(skb)) { |
| 45 | int err = PTR_ERR(skb); |
| 46 | BT_ERR("%s: Reading Intel device address failed (%d)", |
| 47 | hdev->name, err); |
| 48 | return err; |
| 49 | } |
| 50 | |
| 51 | if (skb->len != sizeof(*bda)) { |
| 52 | BT_ERR("%s: Intel device address length mismatch", hdev->name); |
| 53 | kfree_skb(skb); |
| 54 | return -EIO; |
| 55 | } |
| 56 | |
| 57 | bda = (struct hci_rp_read_bd_addr *)skb->data; |
Marcel Holtmann | 48f0ed1 | 2015-04-06 00:52:11 -0700 | [diff] [blame] | 58 | |
| 59 | /* For some Intel based controllers, the default Bluetooth device |
| 60 | * address 00:03:19:9E:8B:00 can be found. These controllers are |
| 61 | * fully operational, but have the danger of duplicate addresses |
| 62 | * and that in turn can cause problems with Bluetooth operation. |
| 63 | */ |
| 64 | if (!bacmp(&bda->bdaddr, BDADDR_INTEL)) { |
| 65 | BT_ERR("%s: Found Intel default device address (%pMR)", |
| 66 | hdev->name, &bda->bdaddr); |
| 67 | set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); |
| 68 | } |
| 69 | |
| 70 | kfree_skb(skb); |
| 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | EXPORT_SYMBOL_GPL(btintel_check_bdaddr); |
| 75 | |
| 76 | int btintel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) |
| 77 | { |
| 78 | struct sk_buff *skb; |
| 79 | int err; |
| 80 | |
| 81 | skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT); |
| 82 | if (IS_ERR(skb)) { |
| 83 | err = PTR_ERR(skb); |
| 84 | BT_ERR("%s: Changing Intel device address failed (%d)", |
| 85 | hdev->name, err); |
| 86 | return err; |
| 87 | } |
| 88 | kfree_skb(skb); |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | EXPORT_SYMBOL_GPL(btintel_set_bdaddr); |
| 93 | |
Marcel Holtmann | 6d2e50d | 2015-10-09 14:42:08 +0200 | [diff] [blame] | 94 | int btintel_set_diag(struct hci_dev *hdev, bool enable) |
| 95 | { |
| 96 | struct sk_buff *skb; |
| 97 | u8 param[3]; |
| 98 | int err; |
| 99 | |
Marcel Holtmann | 6d2e50d | 2015-10-09 14:42:08 +0200 | [diff] [blame] | 100 | if (enable) { |
| 101 | param[0] = 0x03; |
| 102 | param[1] = 0x03; |
| 103 | param[2] = 0x03; |
| 104 | } else { |
| 105 | param[0] = 0x00; |
| 106 | param[1] = 0x00; |
| 107 | param[2] = 0x00; |
| 108 | } |
| 109 | |
| 110 | skb = __hci_cmd_sync(hdev, 0xfc43, 3, param, HCI_INIT_TIMEOUT); |
| 111 | if (IS_ERR(skb)) { |
| 112 | err = PTR_ERR(skb); |
Marcel Holtmann | d8270fb | 2015-10-17 16:00:27 +0200 | [diff] [blame] | 113 | if (err == -ENODATA) |
| 114 | return 0; |
Marcel Holtmann | 6d2e50d | 2015-10-09 14:42:08 +0200 | [diff] [blame] | 115 | BT_ERR("%s: Changing Intel diagnostic mode failed (%d)", |
| 116 | hdev->name, err); |
| 117 | return err; |
| 118 | } |
| 119 | kfree_skb(skb); |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | EXPORT_SYMBOL_GPL(btintel_set_diag); |
| 124 | |
Marcel Holtmann | 3e24767 | 2015-10-17 16:00:28 +0200 | [diff] [blame^] | 125 | int btintel_set_diag_mfg(struct hci_dev *hdev, bool enable) |
| 126 | { |
| 127 | struct sk_buff *skb; |
| 128 | u8 param[2]; |
| 129 | int err; |
| 130 | |
| 131 | param[0] = 0x01; |
| 132 | param[1] = 0x00; |
| 133 | |
| 134 | skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_INIT_TIMEOUT); |
| 135 | if (IS_ERR(skb)) { |
| 136 | err = PTR_ERR(skb); |
| 137 | BT_ERR("%s: Entering Intel manufacturer mode failed (%d)", |
| 138 | hdev->name, err); |
| 139 | return PTR_ERR(skb); |
| 140 | } |
| 141 | kfree_skb(skb); |
| 142 | |
| 143 | err = btintel_set_diag(hdev, enable); |
| 144 | |
| 145 | param[0] = 0x00; |
| 146 | param[1] = 0x00; |
| 147 | |
| 148 | skb = __hci_cmd_sync(hdev, 0xfc11, 2, param, HCI_INIT_TIMEOUT); |
| 149 | if (IS_ERR(skb)) { |
| 150 | err = PTR_ERR(skb); |
| 151 | BT_ERR("%s: Leaving Intel manufacturer mode failed (%d)", |
| 152 | hdev->name, err); |
| 153 | return PTR_ERR(skb); |
| 154 | } |
| 155 | kfree_skb(skb); |
| 156 | |
| 157 | return err; |
| 158 | } |
| 159 | EXPORT_SYMBOL_GPL(btintel_set_diag_mfg); |
| 160 | |
Marcel Holtmann | 973bb97 | 2015-07-05 14:37:38 +0200 | [diff] [blame] | 161 | void btintel_hw_error(struct hci_dev *hdev, u8 code) |
| 162 | { |
| 163 | struct sk_buff *skb; |
| 164 | u8 type = 0x00; |
| 165 | |
| 166 | BT_ERR("%s: Hardware error 0x%2.2x", hdev->name, code); |
| 167 | |
| 168 | skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT); |
| 169 | if (IS_ERR(skb)) { |
| 170 | BT_ERR("%s: Reset after hardware error failed (%ld)", |
| 171 | hdev->name, PTR_ERR(skb)); |
| 172 | return; |
| 173 | } |
| 174 | kfree_skb(skb); |
| 175 | |
| 176 | skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT); |
| 177 | if (IS_ERR(skb)) { |
| 178 | BT_ERR("%s: Retrieving Intel exception info failed (%ld)", |
| 179 | hdev->name, PTR_ERR(skb)); |
| 180 | return; |
| 181 | } |
| 182 | |
| 183 | if (skb->len != 13) { |
| 184 | BT_ERR("%s: Exception info size mismatch", hdev->name); |
| 185 | kfree_skb(skb); |
| 186 | return; |
| 187 | } |
| 188 | |
| 189 | BT_ERR("%s: Exception info %s", hdev->name, (char *)(skb->data + 1)); |
| 190 | |
| 191 | kfree_skb(skb); |
| 192 | } |
| 193 | EXPORT_SYMBOL_GPL(btintel_hw_error); |
| 194 | |
Marcel Holtmann | 7feb99e | 2015-07-05 15:02:07 +0200 | [diff] [blame] | 195 | void btintel_version_info(struct hci_dev *hdev, struct intel_version *ver) |
| 196 | { |
| 197 | const char *variant; |
| 198 | |
| 199 | switch (ver->fw_variant) { |
| 200 | case 0x06: |
| 201 | variant = "Bootloader"; |
| 202 | break; |
| 203 | case 0x23: |
| 204 | variant = "Firmware"; |
| 205 | break; |
| 206 | default: |
| 207 | return; |
| 208 | } |
| 209 | |
| 210 | BT_INFO("%s: %s revision %u.%u build %u week %u %u", hdev->name, |
| 211 | variant, ver->fw_revision >> 4, ver->fw_revision & 0x0f, |
| 212 | ver->fw_build_num, ver->fw_build_ww, 2000 + ver->fw_build_yy); |
| 213 | } |
| 214 | EXPORT_SYMBOL_GPL(btintel_version_info); |
| 215 | |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 216 | int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen, |
| 217 | const void *param) |
| 218 | { |
| 219 | while (plen > 0) { |
| 220 | struct sk_buff *skb; |
| 221 | u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen; |
| 222 | |
| 223 | cmd_param[0] = fragment_type; |
| 224 | memcpy(cmd_param + 1, param, fragment_len); |
| 225 | |
| 226 | skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1, |
| 227 | cmd_param, HCI_INIT_TIMEOUT); |
| 228 | if (IS_ERR(skb)) |
| 229 | return PTR_ERR(skb); |
| 230 | |
| 231 | kfree_skb(skb); |
| 232 | |
| 233 | plen -= fragment_len; |
| 234 | param += fragment_len; |
| 235 | } |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | EXPORT_SYMBOL_GPL(btintel_secure_send); |
| 240 | |
Loic Poulain | 145f236 | 2015-09-04 17:54:34 +0200 | [diff] [blame] | 241 | int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name) |
| 242 | { |
| 243 | const struct firmware *fw; |
| 244 | struct sk_buff *skb; |
| 245 | const u8 *fw_ptr; |
| 246 | int err; |
| 247 | |
| 248 | err = request_firmware_direct(&fw, ddc_name, &hdev->dev); |
| 249 | if (err < 0) { |
| 250 | bt_dev_err(hdev, "Failed to load Intel DDC file %s (%d)", |
| 251 | ddc_name, err); |
| 252 | return err; |
| 253 | } |
| 254 | |
| 255 | bt_dev_info(hdev, "Found Intel DDC parameters: %s", ddc_name); |
| 256 | |
| 257 | fw_ptr = fw->data; |
| 258 | |
| 259 | /* DDC file contains one or more DDC structure which has |
| 260 | * Length (1 byte), DDC ID (2 bytes), and DDC value (Length - 2). |
| 261 | */ |
| 262 | while (fw->size > fw_ptr - fw->data) { |
| 263 | u8 cmd_plen = fw_ptr[0] + sizeof(u8); |
| 264 | |
| 265 | skb = __hci_cmd_sync(hdev, 0xfc8b, cmd_plen, fw_ptr, |
| 266 | HCI_INIT_TIMEOUT); |
| 267 | if (IS_ERR(skb)) { |
| 268 | bt_dev_err(hdev, "Failed to send Intel_Write_DDC (%ld)", |
| 269 | PTR_ERR(skb)); |
| 270 | release_firmware(fw); |
| 271 | return PTR_ERR(skb); |
| 272 | } |
| 273 | |
| 274 | fw_ptr += cmd_plen; |
| 275 | kfree_skb(skb); |
| 276 | } |
| 277 | |
| 278 | release_firmware(fw); |
| 279 | |
| 280 | bt_dev_info(hdev, "Applying Intel DDC parameters completed"); |
| 281 | |
| 282 | return 0; |
| 283 | } |
| 284 | EXPORT_SYMBOL_GPL(btintel_load_ddc_config); |
| 285 | |
Loic Poulain | d06f107 | 2015-10-01 18:16:21 +0200 | [diff] [blame] | 286 | /* ------- REGMAP IBT SUPPORT ------- */ |
| 287 | |
| 288 | #define IBT_REG_MODE_8BIT 0x00 |
| 289 | #define IBT_REG_MODE_16BIT 0x01 |
| 290 | #define IBT_REG_MODE_32BIT 0x02 |
| 291 | |
| 292 | struct regmap_ibt_context { |
| 293 | struct hci_dev *hdev; |
| 294 | __u16 op_write; |
| 295 | __u16 op_read; |
| 296 | }; |
| 297 | |
| 298 | struct ibt_cp_reg_access { |
| 299 | __le32 addr; |
| 300 | __u8 mode; |
| 301 | __u8 len; |
| 302 | __u8 data[0]; |
| 303 | } __packed; |
| 304 | |
| 305 | struct ibt_rp_reg_access { |
| 306 | __u8 status; |
| 307 | __le32 addr; |
| 308 | __u8 data[0]; |
| 309 | } __packed; |
| 310 | |
| 311 | static int regmap_ibt_read(void *context, const void *addr, size_t reg_size, |
| 312 | void *val, size_t val_size) |
| 313 | { |
| 314 | struct regmap_ibt_context *ctx = context; |
| 315 | struct ibt_cp_reg_access cp; |
| 316 | struct ibt_rp_reg_access *rp; |
| 317 | struct sk_buff *skb; |
| 318 | int err = 0; |
| 319 | |
| 320 | if (reg_size != sizeof(__le32)) |
| 321 | return -EINVAL; |
| 322 | |
| 323 | switch (val_size) { |
| 324 | case 1: |
| 325 | cp.mode = IBT_REG_MODE_8BIT; |
| 326 | break; |
| 327 | case 2: |
| 328 | cp.mode = IBT_REG_MODE_16BIT; |
| 329 | break; |
| 330 | case 4: |
| 331 | cp.mode = IBT_REG_MODE_32BIT; |
| 332 | break; |
| 333 | default: |
| 334 | return -EINVAL; |
| 335 | } |
| 336 | |
| 337 | /* regmap provides a little-endian formatted addr */ |
| 338 | cp.addr = *(__le32 *)addr; |
| 339 | cp.len = val_size; |
| 340 | |
| 341 | bt_dev_dbg(ctx->hdev, "Register (0x%x) read", le32_to_cpu(cp.addr)); |
| 342 | |
| 343 | skb = hci_cmd_sync(ctx->hdev, ctx->op_read, sizeof(cp), &cp, |
| 344 | HCI_CMD_TIMEOUT); |
| 345 | if (IS_ERR(skb)) { |
| 346 | err = PTR_ERR(skb); |
| 347 | bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error (%d)", |
| 348 | le32_to_cpu(cp.addr), err); |
| 349 | return err; |
| 350 | } |
| 351 | |
| 352 | if (skb->len != sizeof(*rp) + val_size) { |
| 353 | bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad len", |
| 354 | le32_to_cpu(cp.addr)); |
| 355 | err = -EINVAL; |
| 356 | goto done; |
| 357 | } |
| 358 | |
| 359 | rp = (struct ibt_rp_reg_access *)skb->data; |
| 360 | |
| 361 | if (rp->addr != cp.addr) { |
| 362 | bt_dev_err(ctx->hdev, "regmap: Register (0x%x) read error, bad addr", |
| 363 | le32_to_cpu(rp->addr)); |
| 364 | err = -EINVAL; |
| 365 | goto done; |
| 366 | } |
| 367 | |
| 368 | memcpy(val, rp->data, val_size); |
| 369 | |
| 370 | done: |
| 371 | kfree_skb(skb); |
| 372 | return err; |
| 373 | } |
| 374 | |
| 375 | static int regmap_ibt_gather_write(void *context, |
| 376 | const void *addr, size_t reg_size, |
| 377 | const void *val, size_t val_size) |
| 378 | { |
| 379 | struct regmap_ibt_context *ctx = context; |
| 380 | struct ibt_cp_reg_access *cp; |
| 381 | struct sk_buff *skb; |
| 382 | int plen = sizeof(*cp) + val_size; |
| 383 | u8 mode; |
| 384 | int err = 0; |
| 385 | |
| 386 | if (reg_size != sizeof(__le32)) |
| 387 | return -EINVAL; |
| 388 | |
| 389 | switch (val_size) { |
| 390 | case 1: |
| 391 | mode = IBT_REG_MODE_8BIT; |
| 392 | break; |
| 393 | case 2: |
| 394 | mode = IBT_REG_MODE_16BIT; |
| 395 | break; |
| 396 | case 4: |
| 397 | mode = IBT_REG_MODE_32BIT; |
| 398 | break; |
| 399 | default: |
| 400 | return -EINVAL; |
| 401 | } |
| 402 | |
| 403 | cp = kmalloc(plen, GFP_KERNEL); |
| 404 | if (!cp) |
| 405 | return -ENOMEM; |
| 406 | |
| 407 | /* regmap provides a little-endian formatted addr/value */ |
| 408 | cp->addr = *(__le32 *)addr; |
| 409 | cp->mode = mode; |
| 410 | cp->len = val_size; |
| 411 | memcpy(&cp->data, val, val_size); |
| 412 | |
| 413 | bt_dev_dbg(ctx->hdev, "Register (0x%x) write", le32_to_cpu(cp->addr)); |
| 414 | |
| 415 | skb = hci_cmd_sync(ctx->hdev, ctx->op_write, plen, cp, HCI_CMD_TIMEOUT); |
| 416 | if (IS_ERR(skb)) { |
| 417 | err = PTR_ERR(skb); |
| 418 | bt_dev_err(ctx->hdev, "regmap: Register (0x%x) write error (%d)", |
| 419 | le32_to_cpu(cp->addr), err); |
| 420 | goto done; |
| 421 | } |
| 422 | kfree_skb(skb); |
| 423 | |
| 424 | done: |
| 425 | kfree(cp); |
| 426 | return err; |
| 427 | } |
| 428 | |
| 429 | static int regmap_ibt_write(void *context, const void *data, size_t count) |
| 430 | { |
| 431 | /* data contains register+value, since we only support 32bit addr, |
| 432 | * minimum data size is 4 bytes. |
| 433 | */ |
| 434 | if (WARN_ONCE(count < 4, "Invalid register access")) |
| 435 | return -EINVAL; |
| 436 | |
| 437 | return regmap_ibt_gather_write(context, data, 4, data + 4, count - 4); |
| 438 | } |
| 439 | |
| 440 | static void regmap_ibt_free_context(void *context) |
| 441 | { |
| 442 | kfree(context); |
| 443 | } |
| 444 | |
| 445 | static struct regmap_bus regmap_ibt = { |
| 446 | .read = regmap_ibt_read, |
| 447 | .write = regmap_ibt_write, |
| 448 | .gather_write = regmap_ibt_gather_write, |
| 449 | .free_context = regmap_ibt_free_context, |
| 450 | .reg_format_endian_default = REGMAP_ENDIAN_LITTLE, |
| 451 | .val_format_endian_default = REGMAP_ENDIAN_LITTLE, |
| 452 | }; |
| 453 | |
| 454 | /* Config is the same for all register regions */ |
| 455 | static const struct regmap_config regmap_ibt_cfg = { |
| 456 | .name = "btintel_regmap", |
| 457 | .reg_bits = 32, |
| 458 | .val_bits = 32, |
| 459 | }; |
| 460 | |
| 461 | struct regmap *btintel_regmap_init(struct hci_dev *hdev, u16 opcode_read, |
| 462 | u16 opcode_write) |
| 463 | { |
| 464 | struct regmap_ibt_context *ctx; |
| 465 | |
| 466 | bt_dev_info(hdev, "regmap: Init R%x-W%x region", opcode_read, |
| 467 | opcode_write); |
| 468 | |
| 469 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
| 470 | if (!ctx) |
| 471 | return ERR_PTR(-ENOMEM); |
| 472 | |
| 473 | ctx->op_read = opcode_read; |
| 474 | ctx->op_write = opcode_write; |
| 475 | ctx->hdev = hdev; |
| 476 | |
| 477 | return regmap_init(&hdev->dev, ®map_ibt, ctx, ®map_ibt_cfg); |
| 478 | } |
| 479 | EXPORT_SYMBOL_GPL(btintel_regmap_init); |
| 480 | |
Marcel Holtmann | 48f0ed1 | 2015-04-06 00:52:11 -0700 | [diff] [blame] | 481 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
| 482 | MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION); |
| 483 | MODULE_VERSION(VERSION); |
| 484 | MODULE_LICENSE("GPL"); |
Marcel Holtmann | 0ed97e8 | 2015-08-27 08:57:39 +0200 | [diff] [blame] | 485 | MODULE_FIRMWARE("intel/ibt-11-5.sfi"); |
| 486 | MODULE_FIRMWARE("intel/ibt-11-5.ddc"); |