kernel/drivers/net/wireless/ti/wl1251/cmd.c

   1 #include "cmd.h"
   2
   3 #include <linux/module.h>
   4 #include <linux/slab.h>
   5 #include <linux/etherdevice.h>
   6
   7 #include "wl1251.h"
   8 #include "reg.h"
   9 #include "io.h"
  10 #include "ps.h"
  11 #include "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: length 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                 return -ENOMEM;
 253
 254         cmd->channel = channel;
 255
 256         if (enable)
 257                 cmd_tx = CMD_ENABLE_TX;
 258         else
 259                 cmd_tx = CMD_DISABLE_TX;
 260
 261         ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
 262         if (ret < 0)
 263                 wl1251_error("tx %s cmd for channel %d failed",
 264                              enable ? "start" : "stop", channel);
 265         else
 266                 wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
 267                              enable ? "start" : "stop", channel);
 268
 269         kfree(cmd);
 270         return ret;
 271 }
 272
 273 int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 274                     u16 beacon_interval, u8 dtim_interval)
 275 {
 276         struct cmd_join *join;
 277         int ret, i;
 278         u8 *bssid;
 279
 280         join = kzalloc(sizeof(*join), GFP_KERNEL);
 281         if (!join) {
 282                 ret = -ENOMEM;
 283                 goto out;
 284         }
 285
 286         wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
 287                      bss_type == BSS_TYPE_IBSS ? " ibss" : "",
 288                      channel, beacon_interval, dtim_interval);
 289
 290         /* Reverse order BSSID */
 291         bssid = (u8 *) &join->bssid_lsb;
 292         for (i = 0; i < ETH_ALEN; i++)
 293                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 294
 295         join->rx_config_options = wl->rx_config;
 296         join->rx_filter_options = wl->rx_filter;
 297
 298         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 299                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 300
 301         join->beacon_interval = beacon_interval;
 302         join->dtim_interval = dtim_interval;
 303         join->bss_type = bss_type;
 304         join->channel = channel;
 305         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 306
 307         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 308         if (ret < 0) {
 309                 wl1251_error("failed to initiate cmd join");
 310                 goto out;
 311         }
 312
 313 out:
 314         kfree(join);
 315         return ret;
 316 }
 317
 318 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 319 {
 320         struct wl1251_cmd_ps_params *ps_params = NULL;
 321         int ret = 0;
 322
 323         wl1251_debug(DEBUG_CMD, "cmd set ps mode");
 324
 325         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 326         if (!ps_params) {
 327                 ret = -ENOMEM;
 328                 goto out;
 329         }
 330
 331         ps_params->ps_mode = ps_mode;
 332         ps_params->send_null_data = 1;
 333         ps_params->retries = 5;
 334         ps_params->hang_over_period = 128;
 335         ps_params->null_data_rate = 1; /* 1 Mbps */
 336
 337         ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 338                               sizeof(*ps_params));
 339         if (ret < 0) {
 340                 wl1251_error("cmd set_ps_mode failed");
 341                 goto out;
 342         }
 343
 344 out:
 345         kfree(ps_params);
 346         return ret;
 347 }
 348
 349 int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
 350                            size_t len)
 351 {
 352         struct cmd_read_write_memory *cmd;
 353         int ret = 0;
 354
 355         wl1251_debug(DEBUG_CMD, "cmd read memory");
 356
 357         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 358         if (!cmd) {
 359                 ret = -ENOMEM;
 360                 goto out;
 361         }
 362
 363         WARN_ON(len > MAX_READ_SIZE);
 364         len = min_t(size_t, len, MAX_READ_SIZE);
 365
 366         cmd->addr = addr;
 367         cmd->size = len;
 368
 369         ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 370         if (ret < 0) {
 371                 wl1251_error("read memory command failed: %d", ret);
 372                 goto out;
 373         }
 374
 375         /* the read command got in, we can now read the answer */
 376         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 377
 378         if (cmd->header.status != CMD_STATUS_SUCCESS)
 379                 wl1251_error("error in read command result: %d",
 380                              cmd->header.status);
 381
 382         memcpy(answer, cmd->value, len);
 383
 384 out:
 385         kfree(cmd);
 386         return ret;
 387 }
 388
 389 int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
 390                             void *buf, size_t buf_len)
 391 {
 392         struct wl1251_cmd_packet_template *cmd;
 393         size_t cmd_len;
 394         int ret = 0;
 395
 396         wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 397
 398         WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
 399         buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
 400         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 401
 402         cmd = kzalloc(cmd_len, GFP_KERNEL);
 403         if (!cmd) {
 404                 ret = -ENOMEM;
 405                 goto out;
 406         }
 407
 408         cmd->size = cpu_to_le16(buf_len);
 409
 410         if (buf)
 411                 memcpy(cmd->data, buf, buf_len);
 412
 413         ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
 414         if (ret < 0) {
 415                 wl1251_warning("cmd set_template failed: %d", ret);
 416                 goto out;
 417         }
 418
 419 out:
 420         kfree(cmd);
 421         return ret;
 422 }
 423
 424 int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
 425                     struct ieee80211_channel *channels[],
 426                     unsigned int n_channels, unsigned int n_probes)
 427 {
 428         struct wl1251_cmd_scan *cmd;
 429         int i, ret = 0;
 430
 431         wl1251_debug(DEBUG_CMD, "cmd scan channels %d", n_channels);
 432
 433         WARN_ON(n_channels > SCAN_MAX_NUM_OF_CHANNELS);
 434
 435         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 436         if (!cmd)
 437                 return -ENOMEM;
 438
 439         cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 440         cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
 441                                                     CFG_RX_MGMT_EN |
 442                                                     CFG_RX_BCN_EN);
 443         cmd->params.scan_options = 0;
 444         /*
 445          * Use high priority scan when not associated to prevent fw issue
 446          * causing never-ending scans (sometimes 20+ minutes).
 447          * Note: This bug may be caused by the fw's DTIM handling.
 448          */
 449         if (is_zero_ether_addr(wl->bssid))
 450                 cmd->params.scan_options |= cpu_to_le16(WL1251_SCAN_OPT_PRIORITY_HIGH);
 451         cmd->params.num_channels = n_channels;
 452         cmd->params.num_probe_requests = n_probes;
 453         cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 454         cmd->params.tid_trigger = 0;
 455
 456         for (i = 0; i < n_channels; i++) {
 457                 cmd->channels[i].min_duration =
 458                         cpu_to_le32(WL1251_SCAN_MIN_DURATION);
 459                 cmd->channels[i].max_duration =
 460                         cpu_to_le32(WL1251_SCAN_MAX_DURATION);
 461                 memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
 462                 memset(&cmd->channels[i].bssid_msb, 0xff, 2);
 463                 cmd->channels[i].early_termination = 0;
 464                 cmd->channels[i].tx_power_att = 0;
 465                 cmd->channels[i].channel = channels[i]->hw_value;
 466         }
 467
 468         cmd->params.ssid_len = ssid_len;
 469         if (ssid)
 470                 memcpy(cmd->params.ssid, ssid, ssid_len);
 471
 472         ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
 473         if (ret < 0) {
 474                 wl1251_error("cmd scan failed: %d", ret);
 475                 goto out;
 476         }
 477
 478         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 479
 480         if (cmd->header.status != CMD_STATUS_SUCCESS) {
 481                 wl1251_error("cmd scan status wasn't success: %d",
 482                              cmd->header.status);
 483                 ret = -EIO;
 484                 goto out;
 485         }
 486
 487 out:
 488         kfree(cmd);
 489         return ret;
 490 }
 491
 492 int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
 493 {
 494         struct wl1251_cmd_trigger_scan_to *cmd;
 495         int ret;
 496
 497         wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
 498
 499         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 500         if (!cmd)
 501                 return -ENOMEM;
 502
 503         cmd->timeout = timeout;
 504
 505         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
 506         if (ret < 0) {
 507                 wl1251_error("cmd trigger scan to failed: %d", ret);
 508                 goto out;
 509         }
 510
 511 out:
 512         kfree(cmd);
 513         return ret;
 514 }