drivers/bluetooth/btqca.c

   1 /*
   2  *  Bluetooth supports for Qualcomm Atheros chips
   3  *
   4  *  Copyright (c) 2015 The Linux Foundation. All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License version 2
   8  *  as published by the Free Software Foundation
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20 #include <linux/module.h>
  21 #include <linux/firmware.h>
  22
  23 #include <net/bluetooth/bluetooth.h>
  24 #include <net/bluetooth/hci_core.h>
  25
  26 #include "btqca.h"
  27
  28 #define VERSION "0.1"
  29
  30 int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version)
  31 {
  32         struct sk_buff *skb;
  33         struct edl_event_hdr *edl;
  34         struct rome_version *ver;
  35         char cmd;
  36         int err = 0;
  37
  38         bt_dev_dbg(hdev, "QCA Version Request");
  39
  40         cmd = EDL_PATCH_VER_REQ_CMD;
  41         skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, EDL_PATCH_CMD_LEN,
  42                                 &cmd, HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
  43         if (IS_ERR(skb)) {
  44                 err = PTR_ERR(skb);
  45                 bt_dev_err(hdev, "Reading QCA version information failed (%d)",
  46                            err);
  47                 return err;
  48         }
  49
  50         if (skb->len != sizeof(*edl) + sizeof(*ver)) {
  51                 bt_dev_err(hdev, "QCA Version size mismatch len %d", skb->len);
  52                 err = -EILSEQ;
  53                 goto out;
  54         }
  55
  56         edl = (struct edl_event_hdr *)(skb->data);
  57         if (!edl) {
  58                 bt_dev_err(hdev, "QCA TLV with no header");
  59                 err = -EILSEQ;
  60                 goto out;
  61         }
  62
  63         if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
  64             edl->rtype != EDL_APP_VER_RES_EVT) {
  65                 bt_dev_err(hdev, "QCA Wrong packet received %d %d", edl->cresp,
  66                            edl->rtype);
  67                 err = -EIO;
  68                 goto out;
  69         }
  70
  71         ver = (struct rome_version *)(edl->data);
  72
  73         BT_DBG("%s: Product:0x%08x", hdev->name, le32_to_cpu(ver->product_id));
  74         BT_DBG("%s: Patch  :0x%08x", hdev->name, le16_to_cpu(ver->patch_ver));
  75         BT_DBG("%s: ROM    :0x%08x", hdev->name, le16_to_cpu(ver->rome_ver));
  76         BT_DBG("%s: SOC    :0x%08x", hdev->name, le32_to_cpu(ver->soc_id));
  77
  78         /* QCA chipset version can be decided by patch and SoC
  79          * version, combination with upper 2 bytes from SoC
  80          * and lower 2 bytes from patch will be used.
  81          */
  82         *soc_version = (le32_to_cpu(ver->soc_id) << 16) |
  83                         (le16_to_cpu(ver->rome_ver) & 0x0000ffff);
  84         if (*soc_version == 0)
  85                 err = -EILSEQ;
  86
  87 out:
  88         kfree_skb(skb);
  89         if (err)
  90                 bt_dev_err(hdev, "QCA Failed to get version (%d)", err);
  91
  92         return err;
  93 }
  94 EXPORT_SYMBOL_GPL(qca_read_soc_version);
  95
  96 static int qca_send_reset(struct hci_dev *hdev)
  97 {
  98         struct sk_buff *skb;
  99         int err;
 100
 101         bt_dev_dbg(hdev, "QCA HCI_RESET");
 102
 103         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 104         if (IS_ERR(skb)) {
 105                 err = PTR_ERR(skb);
 106                 bt_dev_err(hdev, "QCA Reset failed (%d)", err);
 107                 return err;
 108         }
 109
 110         kfree_skb(skb);
 111
 112         return 0;
 113 }
 114
 115 static void qca_tlv_check_data(struct rome_config *config,
 116                                 const struct firmware *fw)
 117 {
 118         const u8 *data;
 119         u32 type_len;
 120         u16 tag_id, tag_len;
 121         int idx, length;
 122         struct tlv_type_hdr *tlv;
 123         struct tlv_type_patch *tlv_patch;
 124         struct tlv_type_nvm *tlv_nvm;
 125
 126         tlv = (struct tlv_type_hdr *)fw->data;
 127
 128         type_len = le32_to_cpu(tlv->type_len);
 129         length = (type_len >> 8) & 0x00ffffff;
 130
 131         BT_DBG("TLV Type\t\t : 0x%x", type_len & 0x000000ff);
 132         BT_DBG("Length\t\t : %d bytes", length);
 133
 134         config->dnld_mode = ROME_SKIP_EVT_NONE;
 135
 136         switch (config->type) {
 137         case TLV_TYPE_PATCH:
 138                 tlv_patch = (struct tlv_type_patch *)tlv->data;
 139
 140                 /* For Rome version 1.1 to 3.1, all segment commands
 141                  * are acked by a vendor specific event (VSE).
 142                  * For Rome >= 3.2, the download mode field indicates
 143                  * if VSE is skipped by the controller.
 144                  * In case VSE is skipped, only the last segment is acked.
 145                  */
 146                 config->dnld_mode = tlv_patch->download_mode;
 147
 148                 BT_DBG("Total Length           : %d bytes",
 149                        le32_to_cpu(tlv_patch->total_size));
 150                 BT_DBG("Patch Data Length      : %d bytes",
 151                        le32_to_cpu(tlv_patch->data_length));
 152                 BT_DBG("Signing Format Version : 0x%x",
 153                        tlv_patch->format_version);
 154                 BT_DBG("Signature Algorithm    : 0x%x",
 155                        tlv_patch->signature);
 156                 BT_DBG("Download mode          : 0x%x",
 157                        tlv_patch->download_mode);
 158                 BT_DBG("Reserved               : 0x%x",
 159                        tlv_patch->reserved1);
 160                 BT_DBG("Product ID             : 0x%04x",
 161                        le16_to_cpu(tlv_patch->product_id));
 162                 BT_DBG("Rom Build Version      : 0x%04x",
 163                        le16_to_cpu(tlv_patch->rom_build));
 164                 BT_DBG("Patch Version          : 0x%04x",
 165                        le16_to_cpu(tlv_patch->patch_version));
 166                 BT_DBG("Reserved               : 0x%x",
 167                        le16_to_cpu(tlv_patch->reserved2));
 168                 BT_DBG("Patch Entry Address    : 0x%x",
 169                        le32_to_cpu(tlv_patch->entry));
 170                 break;
 171
 172         case TLV_TYPE_NVM:
 173                 idx = 0;
 174                 data = tlv->data;
 175                 while (idx < length) {
 176                         tlv_nvm = (struct tlv_type_nvm *)(data + idx);
 177
 178                         tag_id = le16_to_cpu(tlv_nvm->tag_id);
 179                         tag_len = le16_to_cpu(tlv_nvm->tag_len);
 180
 181                         /* Update NVM tags as needed */
 182                         switch (tag_id) {
 183                         case EDL_TAG_ID_HCI:
 184                                 /* HCI transport layer parameters
 185                                  * enabling software inband sleep
 186                                  * onto controller side.
 187                                  */
 188                                 tlv_nvm->data[0] |= 0x80;
 189
 190                                 /* UART Baud Rate */
 191                                 tlv_nvm->data[2] = config->user_baud_rate;
 192
 193                                 break;
 194
 195                         case EDL_TAG_ID_DEEP_SLEEP:
 196                                 /* Sleep enable mask
 197                                  * enabling deep sleep feature on controller.
 198                                  */
 199                                 tlv_nvm->data[0] |= 0x01;
 200
 201                                 break;
 202                         }
 203
 204                         idx += (sizeof(u16) + sizeof(u16) + 8 + tag_len);
 205                 }
 206                 break;
 207
 208         default:
 209                 BT_ERR("Unknown TLV type %d", config->type);
 210                 break;
 211         }
 212 }
 213
 214 static int qca_tlv_send_segment(struct hci_dev *hdev, int seg_size,
 215                                  const u8 *data, enum rome_tlv_dnld_mode mode)
 216 {
 217         struct sk_buff *skb;
 218         struct edl_event_hdr *edl;
 219         struct tlv_seg_resp *tlv_resp;
 220         u8 cmd[MAX_SIZE_PER_TLV_SEGMENT + 2];
 221         int err = 0;
 222
 223         cmd[0] = EDL_PATCH_TLV_REQ_CMD;
 224         cmd[1] = seg_size;
 225         memcpy(cmd + 2, data, seg_size);
 226
 227         if (mode == ROME_SKIP_EVT_VSE_CC || mode == ROME_SKIP_EVT_VSE)
 228                 return __hci_cmd_send(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2,
 229                                       cmd);
 230
 231         skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2, cmd,
 232                                 HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
 233         if (IS_ERR(skb)) {
 234                 err = PTR_ERR(skb);
 235                 bt_dev_err(hdev, "QCA Failed to send TLV segment (%d)", err);
 236                 return err;
 237         }
 238
 239         if (skb->len != sizeof(*edl) + sizeof(*tlv_resp)) {
 240                 bt_dev_err(hdev, "QCA TLV response size mismatch");
 241                 err = -EILSEQ;
 242                 goto out;
 243         }
 244
 245         edl = (struct edl_event_hdr *)(skb->data);
 246         if (!edl) {
 247                 bt_dev_err(hdev, "TLV with no header");
 248                 err = -EILSEQ;
 249                 goto out;
 250         }
 251
 252         tlv_resp = (struct tlv_seg_resp *)(edl->data);
 253
 254         if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
 255             edl->rtype != EDL_TVL_DNLD_RES_EVT || tlv_resp->result != 0x00) {
 256                 bt_dev_err(hdev, "QCA TLV with error stat 0x%x rtype 0x%x (0x%x)",
 257                            edl->cresp, edl->rtype, tlv_resp->result);
 258                 err = -EIO;
 259         }
 260
 261 out:
 262         kfree_skb(skb);
 263
 264         return err;
 265 }
 266
 267 static int qca_download_firmware(struct hci_dev *hdev,
 268                                   struct rome_config *config)
 269 {
 270         const struct firmware *fw;
 271         const u8 *segment;
 272         int ret, remain, i = 0;
 273
 274         bt_dev_info(hdev, "QCA Downloading %s", config->fwname);
 275
 276         ret = request_firmware(&fw, config->fwname, &hdev->dev);
 277         if (ret) {
 278                 bt_dev_err(hdev, "QCA Failed to request file: %s (%d)",
 279                            config->fwname, ret);
 280                 return ret;
 281         }
 282
 283         qca_tlv_check_data(config, fw);
 284
 285         segment = fw->data;
 286         remain = fw->size;
 287         while (remain > 0) {
 288                 int segsize = min(MAX_SIZE_PER_TLV_SEGMENT, remain);
 289
 290                 bt_dev_dbg(hdev, "Send segment %d, size %d", i++, segsize);
 291
 292                 remain -= segsize;
 293                 /* The last segment is always acked regardless download mode */
 294                 if (!remain || segsize < MAX_SIZE_PER_TLV_SEGMENT)
 295                         config->dnld_mode = ROME_SKIP_EVT_NONE;
 296
 297                 ret = qca_tlv_send_segment(hdev, segsize, segment,
 298                                             config->dnld_mode);
 299                 if (ret)
 300                         break;
 301
 302                 segment += segsize;
 303         }
 304
 305         release_firmware(fw);
 306
 307         return ret;
 308 }
 309
 310 int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 311 {
 312         struct sk_buff *skb;
 313         u8 cmd[9];
 314         int err;
 315
 316         cmd[0] = EDL_NVM_ACCESS_SET_REQ_CMD;
 317         cmd[1] = 0x02;                  /* TAG ID */
 318         cmd[2] = sizeof(bdaddr_t);      /* size */
 319         memcpy(cmd + 3, bdaddr, sizeof(bdaddr_t));
 320         skb = __hci_cmd_sync_ev(hdev, EDL_NVM_ACCESS_OPCODE, sizeof(cmd), cmd,
 321                                 HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
 322         if (IS_ERR(skb)) {
 323                 err = PTR_ERR(skb);
 324                 bt_dev_err(hdev, "QCA Change address command failed (%d)", err);
 325                 return err;
 326         }
 327
 328         kfree_skb(skb);
 329
 330         return 0;
 331 }
 332 EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
 333
 334 int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 335                    enum qca_btsoc_type soc_type, u32 soc_ver)
 336 {
 337         struct rome_config config;
 338         int err;
 339         u8 rom_ver;
 340
 341         bt_dev_dbg(hdev, "QCA setup on UART");
 342
 343         config.user_baud_rate = baudrate;
 344
 345         /* Download rampatch file */
 346         config.type = TLV_TYPE_PATCH;
 347         if (soc_type == QCA_WCN3990) {
 348                 /* Firmware files to download are based on ROM version.
 349                  * ROM version is derived from last two bytes of soc_ver.
 350                  */
 351                 rom_ver = ((soc_ver & 0x00000f00) >> 0x04) |
 352                             (soc_ver & 0x0000000f);
 353                 snprintf(config.fwname, sizeof(config.fwname),
 354                          "qca/crbtfw%02x.tlv", rom_ver);
 355         } else {
 356                 snprintf(config.fwname, sizeof(config.fwname),
 357                          "qca/rampatch_%08x.bin", soc_ver);
 358         }
 359
 360         err = qca_download_firmware(hdev, &config);
 361         if (err < 0) {
 362                 bt_dev_err(hdev, "QCA Failed to download patch (%d)", err);
 363                 return err;
 364         }
 365
 366         /* Download NVM configuration */
 367         config.type = TLV_TYPE_NVM;
 368         if (soc_type == QCA_WCN3990)
 369                 snprintf(config.fwname, sizeof(config.fwname),
 370                          "qca/crnv%02x.bin", rom_ver);
 371         else
 372                 snprintf(config.fwname, sizeof(config.fwname),
 373                          "qca/nvm_%08x.bin", soc_ver);
 374
 375         err = qca_download_firmware(hdev, &config);
 376         if (err < 0) {
 377                 bt_dev_err(hdev, "QCA Failed to download NVM (%d)", err);
 378                 return err;
 379         }
 380
 381         /* Perform HCI reset */
 382         err = qca_send_reset(hdev);
 383         if (err < 0) {
 384                 bt_dev_err(hdev, "QCA Failed to run HCI_RESET (%d)", err);
 385                 return err;
 386         }
 387
 388         bt_dev_info(hdev, "QCA setup on UART is completed");
 389
 390         return 0;
 391 }
 392 EXPORT_SYMBOL_GPL(qca_uart_setup);
 393
 394 MODULE_AUTHOR("Ben Young Tae Kim <ytkim@qca.qualcomm.com>");
 395 MODULE_DESCRIPTION("Bluetooth support for Qualcomm Atheros family ver " VERSION);
 396 MODULE_VERSION(VERSION);
 397 MODULE_LICENSE("GPL");