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                 goto out;
 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         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 304                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 305
 306         join->beacon_interval = beacon_interval;
 307         join->dtim_interval = dtim_interval;
 308         join->bss_type = bss_type;
 309         join->channel = channel;
 310         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 311
 312         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 313         if (ret < 0) {
 314                 wl1251_error("failed to initiate cmd join");
 315                 goto out;
 316         }
 317
 318 out:
 319         kfree(join);
 320         return ret;
 321 }
 322
 323 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 324 {
 325         struct wl1251_cmd_ps_params *ps_params = NULL;
 326         int ret = 0;
 327
 328         wl1251_debug(DEBUG_CMD, "cmd set ps mode");
 329
 330         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 331         if (!ps_params) {
 332                 ret = -ENOMEM;
 333                 goto out;
 334         }
 335
 336         ps_params->ps_mode = ps_mode;
 337         ps_params->send_null_data = 1;
 338         ps_params->retries = 5;
 339         ps_params->hang_over_period = 128;
 340         ps_params->null_data_rate = 1; /* 1 Mbps */
 341
 342         ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 343                               sizeof(*ps_params));
 344         if (ret < 0) {
 345                 wl1251_error("cmd set_ps_mode failed");
 346                 goto out;
 347         }
 348
 349 out:
 350         kfree(ps_params);
 351         return ret;
 352 }
 353
 354 int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
 355                            size_t len)
 356 {
 357         struct cmd_read_write_memory *cmd;
 358         int ret = 0;
 359
 360         wl1251_debug(DEBUG_CMD, "cmd read memory");
 361
 362         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 363         if (!cmd) {
 364                 ret = -ENOMEM;
 365                 goto out;
 366         }
 367
 368         WARN_ON(len > MAX_READ_SIZE);
 369         len = min_t(size_t, len, MAX_READ_SIZE);
 370
 371         cmd->addr = addr;
 372         cmd->size = len;
 373
 374         ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 375         if (ret < 0) {
 376                 wl1251_error("read memory command failed: %d", ret);
 377                 goto out;
 378         }
 379
 380         /* the read command got in, we can now read the answer */
 381         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 382
 383         if (cmd->header.status != CMD_STATUS_SUCCESS)
 384                 wl1251_error("error in read command result: %d",
 385                              cmd->header.status);
 386
 387         memcpy(answer, cmd->value, len);
 388
 389 out:
 390         kfree(cmd);
 391         return ret;
 392 }
 393
 394 int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
 395                             void *buf, size_t buf_len)
 396 {
 397         struct wl1251_cmd_packet_template *cmd;
 398         size_t cmd_len;
 399         int ret = 0;
 400
 401         wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 402
 403         WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
 404         buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
 405         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 406
 407         cmd = kzalloc(cmd_len, GFP_KERNEL);
 408         if (!cmd) {
 409                 ret = -ENOMEM;
 410                 goto out;
 411         }
 412
 413         cmd->size = cpu_to_le16(buf_len);
 414
 415         if (buf)
 416                 memcpy(cmd->data, buf, buf_len);
 417
 418         ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
 419         if (ret < 0) {
 420                 wl1251_warning("cmd set_template failed: %d", ret);
 421                 goto out;
 422         }
 423
 424 out:
 425         kfree(cmd);
 426         return ret;
 427 }
 428
 429 int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
 430                     struct ieee80211_channel *channels[],
 431                     unsigned int n_channels, unsigned int n_probes)
 432 {
 433         struct wl1251_cmd_scan *cmd;
 434         int i, ret = 0;
 435
 436         wl1251_debug(DEBUG_CMD, "cmd scan");
 437
 438         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 439         if (!cmd)
 440                 return -ENOMEM;
 441
 442         cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 443         cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
 444                                                     CFG_RX_MGMT_EN |
 445                                                     CFG_RX_BCN_EN);
 446         cmd->params.scan_options = 0;
 447         /*
 448          * Use high priority scan when not associated to prevent fw issue
 449          * causing never-ending scans (sometimes 20+ minutes).
 450          * Note: This bug may be caused by the fw's DTIM handling.
 451          */
 452         if (is_zero_ether_addr(wl->bssid))
 453                 cmd->params.scan_options |= WL1251_SCAN_OPT_PRIORITY_HIGH;
 454         cmd->params.num_channels = n_channels;
 455         cmd->params.num_probe_requests = n_probes;
 456         cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 457         cmd->params.tid_trigger = 0;
 458
 459         for (i = 0; i < n_channels; i++) {
 460                 cmd->channels[i].min_duration =
 461                         cpu_to_le32(WL1251_SCAN_MIN_DURATION);
 462                 cmd->channels[i].max_duration =
 463                         cpu_to_le32(WL1251_SCAN_MAX_DURATION);
 464                 memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
 465                 memset(&cmd->channels[i].bssid_msb, 0xff, 2);
 466                 cmd->channels[i].early_termination = 0;
 467                 cmd->channels[i].tx_power_att = 0;
 468                 cmd->channels[i].channel = channels[i]->hw_value;
 469         }
 470
 471         cmd->params.ssid_len = ssid_len;
 472         if (ssid)
 473                 memcpy(cmd->params.ssid, ssid, ssid_len);
 474
 475         ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
 476         if (ret < 0) {
 477                 wl1251_error("cmd scan failed: %d", ret);
 478                 goto out;
 479         }
 480
 481         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 482
 483         if (cmd->header.status != CMD_STATUS_SUCCESS) {
 484                 wl1251_error("cmd scan status wasn't success: %d",
 485                              cmd->header.status);
 486                 ret = -EIO;
 487                 goto out;
 488         }
 489
 490 out:
 491         kfree(cmd);
 492         return ret;
 493 }
 494
 495 int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
 496 {
 497         struct wl1251_cmd_trigger_scan_to *cmd;
 498         int ret;
 499
 500         wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
 501
 502         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 503         if (!cmd)
 504                 return -ENOMEM;
 505
 506         cmd->timeout = timeout;
 507
 508         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
 509         if (ret < 0) {
 510                 wl1251_error("cmd trigger scan to failed: %d", ret);
 511                 goto out;
 512         }
 513
 514 out:
 515         kfree(cmd);
 516         return ret;
 517 }