drivers/net/wireless/wl12xx/wl1251_cmd.c

   1 #include "wl1251_cmd.h"
   2
   3 #include <linux/module.h>
   4 #include <linux/crc7.h>
   5 #include <linux/etherdevice.h>
   6
   7 #include "wl1251.h"
   8 #include "wl1251_reg.h"
   9 #include "wl1251_io.h"
  10 #include "wl1251_ps.h"
  11 #include "wl1251_acx.h"
  12
  13 /**
  14  * send command to firmware
  15  *
  16  * @wl: wl struct
  17  * @id: command id
  18  * @buf: buffer containing the command, must work with dma
  19  * @len: length of the buffer
  20  */
  21 int wl1251_cmd_send(struct wl1251 *wl, u16 id, void *buf, size_t len)
  22 {
  23         struct wl1251_cmd_header *cmd;
  24         unsigned long timeout;
  25         u32 intr;
  26         int ret = 0;
  27
  28         cmd = buf;
  29         cmd->id = id;
  30         cmd->status = 0;
  31
  32         WARN_ON(len % 4 != 0);
  33
  34         wl1251_mem_write(wl, wl->cmd_box_addr, buf, len);
  35
  36         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);
  37
  38         timeout = jiffies + msecs_to_jiffies(WL1251_COMMAND_TIMEOUT);
  39
  40         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  41         while (!(intr & WL1251_ACX_INTR_CMD_COMPLETE)) {
  42                 if (time_after(jiffies, timeout)) {
  43                         wl1251_error("command complete timeout");
  44                         ret = -ETIMEDOUT;
  45                         goto out;
  46                 }
  47
  48                 msleep(1);
  49
  50                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  51         }
  52
  53         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
  54                            WL1251_ACX_INTR_CMD_COMPLETE);
  55
  56 out:
  57         return ret;
  58 }
  59
  60 /**
  61  * send test command to firmware
  62  *
  63  * @wl: wl struct
  64  * @buf: buffer containing the command, with all headers, must work with dma
  65  * @len: length of the buffer
  66  * @answer: is answer needed
  67  */
  68 int wl1251_cmd_test(struct wl1251 *wl, void *buf, size_t buf_len, u8 answer)
  69 {
  70         int ret;
  71
  72         wl1251_debug(DEBUG_CMD, "cmd test");
  73
  74         ret = wl1251_cmd_send(wl, CMD_TEST, buf, buf_len);
  75
  76         if (ret < 0) {
  77                 wl1251_warning("TEST command failed");
  78                 return ret;
  79         }
  80
  81         if (answer) {
  82                 struct wl1251_command *cmd_answer;
  83
  84                 /*
  85                  * The test command got in, we can read the answer.
  86                  * The answer would be a wl1251_command, where the
  87                  * parameter array contains the actual answer.
  88                  */
  89                 wl1251_mem_read(wl, wl->cmd_box_addr, buf, buf_len);
  90
  91                 cmd_answer = buf;
  92
  93                 if (cmd_answer->header.status != CMD_STATUS_SUCCESS)
  94                         wl1251_error("TEST command answer error: %d",
  95                                      cmd_answer->header.status);
  96         }
  97
  98         return 0;
  99 }
 100
 101 /**
 102  * read acx from firmware
 103  *
 104  * @wl: wl struct
 105  * @id: acx id
 106  * @buf: buffer for the response, including all headers, must work with dma
 107  * @len: lenght of buf
 108  */
 109 int wl1251_cmd_interrogate(struct wl1251 *wl, u16 id, void *buf, size_t len)
 110 {
 111         struct acx_header *acx = buf;
 112         int ret;
 113
 114         wl1251_debug(DEBUG_CMD, "cmd interrogate");
 115
 116         acx->id = id;
 117
 118         /* payload length, does not include any headers */
 119         acx->len = len - sizeof(*acx);
 120
 121         ret = wl1251_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
 122         if (ret < 0) {
 123                 wl1251_error("INTERROGATE command failed");
 124                 goto out;
 125         }
 126
 127         /* the interrogate command got in, we can read the answer */
 128         wl1251_mem_read(wl, wl->cmd_box_addr, buf, len);
 129
 130         acx = buf;
 131         if (acx->cmd.status != CMD_STATUS_SUCCESS)
 132                 wl1251_error("INTERROGATE command error: %d",
 133                              acx->cmd.status);
 134
 135 out:
 136         return ret;
 137 }
 138
 139 /**
 140  * write acx value to firmware
 141  *
 142  * @wl: wl struct
 143  * @id: acx id
 144  * @buf: buffer containing acx, including all headers, must work with dma
 145  * @len: length of buf
 146  */
 147 int wl1251_cmd_configure(struct wl1251 *wl, u16 id, void *buf, size_t len)
 148 {
 149         struct acx_header *acx = buf;
 150         int ret;
 151
 152         wl1251_debug(DEBUG_CMD, "cmd configure");
 153
 154         acx->id = id;
 155
 156         /* payload length, does not include any headers */
 157         acx->len = len - sizeof(*acx);
 158
 159         ret = wl1251_cmd_send(wl, CMD_CONFIGURE, acx, len);
 160         if (ret < 0) {
 161                 wl1251_warning("CONFIGURE command NOK");
 162                 return ret;
 163         }
 164
 165         return 0;
 166 }
 167
 168 int wl1251_cmd_vbm(struct wl1251 *wl, u8 identity,
 169                    void *bitmap, u16 bitmap_len, u8 bitmap_control)
 170 {
 171         struct wl1251_cmd_vbm_update *vbm;
 172         int ret;
 173
 174         wl1251_debug(DEBUG_CMD, "cmd vbm");
 175
 176         vbm = kzalloc(sizeof(*vbm), GFP_KERNEL);
 177         if (!vbm) {
 178                 ret = -ENOMEM;
 179                 goto out;
 180         }
 181
 182         /* Count and period will be filled by the target */
 183         vbm->tim.bitmap_ctrl = bitmap_control;
 184         if (bitmap_len > PARTIAL_VBM_MAX) {
 185                 wl1251_warning("cmd vbm len is %d B, truncating to %d",
 186                                bitmap_len, PARTIAL_VBM_MAX);
 187                 bitmap_len = PARTIAL_VBM_MAX;
 188         }
 189         memcpy(vbm->tim.pvb_field, bitmap, bitmap_len);
 190         vbm->tim.identity = identity;
 191         vbm->tim.length = bitmap_len + 3;
 192
 193         vbm->len = cpu_to_le16(bitmap_len + 5);
 194
 195         ret = wl1251_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
 196         if (ret < 0) {
 197                 wl1251_error("VBM command failed");
 198                 goto out;
 199         }
 200
 201 out:
 202         kfree(vbm);
 203         return ret;
 204 }
 205
 206 int wl1251_cmd_data_path_rx(struct wl1251 *wl, u8 channel, bool enable)
 207 {
 208         struct cmd_enabledisable_path *cmd;
 209         int ret;
 210         u16 cmd_rx;
 211
 212         wl1251_debug(DEBUG_CMD, "cmd data path");
 213
 214         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 215         if (!cmd) {
 216                 ret = -ENOMEM;
 217                 goto out;
 218         }
 219
 220         cmd->channel = channel;
 221
 222         if (enable)
 223                 cmd_rx = CMD_ENABLE_RX;
 224         else
 225                 cmd_rx = CMD_DISABLE_RX;
 226
 227         ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
 228         if (ret < 0) {
 229                 wl1251_error("rx %s cmd for channel %d failed",
 230                              enable ? "start" : "stop", channel);
 231                 goto out;
 232         }
 233
 234         wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
 235                      enable ? "start" : "stop", channel);
 236
 237 out:
 238         kfree(cmd);
 239         return ret;
 240 }
 241
 242 int wl1251_cmd_data_path_tx(struct wl1251 *wl, u8 channel, bool enable)
 243 {
 244         struct cmd_enabledisable_path *cmd;
 245         int ret;
 246         u16 cmd_tx;
 247
 248         wl1251_debug(DEBUG_CMD, "cmd data path");
 249
 250         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 251         if (!cmd) {
 252                 ret = -ENOMEM;
 253                 goto out;
 254         }
 255
 256         cmd->channel = channel;
 257
 258         if (enable)
 259                 cmd_tx = CMD_ENABLE_TX;
 260         else
 261                 cmd_tx = CMD_DISABLE_TX;
 262
 263         ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
 264         if (ret < 0) {
 265                 wl1251_error("tx %s cmd for channel %d failed",
 266                              enable ? "start" : "stop", channel);
 267                 return ret;
 268         }
 269
 270         wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
 271                      enable ? "start" : "stop", channel);
 272
 273 out:
 274         kfree(cmd);
 275         return ret;
 276 }
 277
 278 int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 279                     u16 beacon_interval, u8 dtim_interval)
 280 {
 281         struct cmd_join *join;
 282         int ret, i;
 283         u8 *bssid;
 284
 285         join = kzalloc(sizeof(*join), GFP_KERNEL);
 286         if (!join) {
 287                 ret = -ENOMEM;
 288                 goto out;
 289         }
 290
 291         wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
 292                      bss_type == BSS_TYPE_IBSS ? " ibss" : "",
 293                      channel, beacon_interval, dtim_interval);
 294
 295         /* Reverse order BSSID */
 296         bssid = (u8 *) &join->bssid_lsb;
 297         for (i = 0; i < ETH_ALEN; i++)
 298                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 299
 300         join->rx_config_options = wl->rx_config;
 301         join->rx_filter_options = wl->rx_filter;
 302
 303         /*
 304          * FIXME: disable temporarily all filters because after commit
 305          * 9cef8737 "mac80211: fix managed mode BSSID handling" broke
 306          * association. The filter logic needs to be implemented properly
 307          * and once that is done, this hack can be removed.
 308          */
 309         join->rx_config_options = 0;
 310         join->rx_filter_options = WL1251_DEFAULT_RX_FILTER;
 311
 312         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 313                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 314
 315         join->beacon_interval = beacon_interval;
 316         join->dtim_interval = dtim_interval;
 317         join->bss_type = bss_type;
 318         join->channel = channel;
 319         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 320
 321         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 322         if (ret < 0) {
 323                 wl1251_error("failed to initiate cmd join");
 324                 goto out;
 325         }
 326
 327 out:
 328         kfree(join);
 329         return ret;
 330 }
 331
 332 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 333 {
 334         struct wl1251_cmd_ps_params *ps_params = NULL;
 335         int ret = 0;
 336
 337         wl1251_debug(DEBUG_CMD, "cmd set ps mode");
 338
 339         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 340         if (!ps_params) {
 341                 ret = -ENOMEM;
 342                 goto out;
 343         }
 344
 345         ps_params->ps_mode = ps_mode;
 346         ps_params->send_null_data = 1;
 347         ps_params->retries = 5;
 348         ps_params->hang_over_period = 128;
 349         ps_params->null_data_rate = 1; /* 1 Mbps */
 350
 351         ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 352                               sizeof(*ps_params));
 353         if (ret < 0) {
 354                 wl1251_error("cmd set_ps_mode failed");
 355                 goto out;
 356         }
 357
 358 out:
 359         kfree(ps_params);
 360         return ret;
 361 }
 362
 363 int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
 364                            size_t len)
 365 {
 366         struct cmd_read_write_memory *cmd;
 367         int ret = 0;
 368
 369         wl1251_debug(DEBUG_CMD, "cmd read memory");
 370
 371         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 372         if (!cmd) {
 373                 ret = -ENOMEM;
 374                 goto out;
 375         }
 376
 377         WARN_ON(len > MAX_READ_SIZE);
 378         len = min_t(size_t, len, MAX_READ_SIZE);
 379
 380         cmd->addr = addr;
 381         cmd->size = len;
 382
 383         ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 384         if (ret < 0) {
 385                 wl1251_error("read memory command failed: %d", ret);
 386                 goto out;
 387         }
 388
 389         /* the read command got in, we can now read the answer */
 390         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 391
 392         if (cmd->header.status != CMD_STATUS_SUCCESS)
 393                 wl1251_error("error in read command result: %d",
 394                              cmd->header.status);
 395
 396         memcpy(answer, cmd->value, len);
 397
 398 out:
 399         kfree(cmd);
 400         return ret;
 401 }
 402
 403 int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
 404                             void *buf, size_t buf_len)
 405 {
 406         struct wl1251_cmd_packet_template *cmd;
 407         size_t cmd_len;
 408         int ret = 0;
 409
 410         wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 411
 412         WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
 413         buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
 414         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 415
 416         cmd = kzalloc(cmd_len, GFP_KERNEL);
 417         if (!cmd) {
 418                 ret = -ENOMEM;
 419                 goto out;
 420         }
 421
 422         cmd->size = cpu_to_le16(buf_len);
 423
 424         if (buf)
 425                 memcpy(cmd->data, buf, buf_len);
 426
 427         ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
 428         if (ret < 0) {
 429                 wl1251_warning("cmd set_template failed: %d", ret);
 430                 goto out;
 431         }
 432
 433 out:
 434         kfree(cmd);
 435         return ret;
 436 }
 437
 438 int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
 439                     struct ieee80211_channel *channels[],
 440                     unsigned int n_channels, unsigned int n_probes)
 441 {
 442         struct wl1251_cmd_scan *cmd;
 443         int i, ret = 0;
 444
 445         wl1251_debug(DEBUG_CMD, "cmd scan");
 446
 447         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 448         if (!cmd)
 449                 return -ENOMEM;
 450
 451         cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 452         cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
 453                                                     CFG_RX_MGMT_EN |
 454                                                     CFG_RX_BCN_EN);
 455         cmd->params.scan_options = 0;
 456         /*
 457          * Use high priority scan when not associated to prevent fw issue
 458          * causing never-ending scans (sometimes 20+ minutes).
 459          * Note: This bug may be caused by the fw's DTIM handling.
 460          */
 461         if (is_zero_ether_addr(wl->bssid))
 462                 cmd->params.scan_options |= WL1251_SCAN_OPT_PRIORITY_HIGH;
 463         cmd->params.num_channels = n_channels;
 464         cmd->params.num_probe_requests = n_probes;
 465         cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 466         cmd->params.tid_trigger = 0;
 467
 468         for (i = 0; i < n_channels; i++) {
 469                 cmd->channels[i].min_duration =
 470                         cpu_to_le32(WL1251_SCAN_MIN_DURATION);
 471                 cmd->channels[i].max_duration =
 472                         cpu_to_le32(WL1251_SCAN_MAX_DURATION);
 473                 memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
 474                 memset(&cmd->channels[i].bssid_msb, 0xff, 2);
 475                 cmd->channels[i].early_termination = 0;
 476                 cmd->channels[i].tx_power_att = 0;
 477                 cmd->channels[i].channel = channels[i]->hw_value;
 478         }
 479
 480         cmd->params.ssid_len = ssid_len;
 481         if (ssid)
 482                 memcpy(cmd->params.ssid, ssid, ssid_len);
 483
 484         ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
 485         if (ret < 0) {
 486                 wl1251_error("cmd scan failed: %d", ret);
 487                 goto out;
 488         }
 489
 490         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 491
 492         if (cmd->header.status != CMD_STATUS_SUCCESS) {
 493                 wl1251_error("cmd scan status wasn't success: %d",
 494                              cmd->header.status);
 495                 ret = -EIO;
 496                 goto out;
 497         }
 498
 499 out:
 500         kfree(cmd);
 501         return ret;
 502 }
 503
 504 int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
 505 {
 506         struct wl1251_cmd_trigger_scan_to *cmd;
 507         int ret;
 508
 509         wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
 510
 511         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 512         if (!cmd)
 513                 return -ENOMEM;
 514
 515         cmd->timeout = timeout;
 516
 517         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
 518         if (ret < 0) {
 519                 wl1251_error("cmd trigger scan to failed: %d", ret);
 520                 goto out;
 521         }
 522
 523 out:
 524         kfree(cmd);
 525         return ret;
 526 }