drivers/net/wireless/wl1251/cmd.c

   1 #include "cmd.h"
   2
   3 #include <linux/module.h>
   4 #include <linux/slab.h>
   5 #include <linux/crc7.h>
   6 #include <linux/etherdevice.h>
   7
   8 #include "wl1251.h"
   9 #include "reg.h"
  10 #include "io.h"
  11 #include "ps.h"
  12 #include "acx.h"
  13
  14 /**
  15  * send command to firmware
  16  *
  17  * @wl: wl struct
  18  * @id: command id
  19  * @buf: buffer containing the command, must work with dma
  20  * @len: length of the buffer
  21  */
  22 int wl1251_cmd_send(struct wl1251 *wl, u16 id, void *buf, size_t len)
  23 {
  24         struct wl1251_cmd_header *cmd;
  25         unsigned long timeout;
  26         u32 poll_count = 0;
  27         u32 intr;
  28         int ret = 0;
  29
  30         cmd = buf;
  31         cmd->id = id;
  32         cmd->status = 0;
  33
  34         WARN_ON(len % 4 != 0);
  35
  36         wl1251_mem_write(wl, wl->cmd_box_addr, buf, len);
  37
  38         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);
  39
  40         timeout = jiffies + msecs_to_jiffies(WL1251_COMMAND_TIMEOUT);
  41
  42         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  43         while (!(intr & WL1251_ACX_INTR_CMD_COMPLETE)) {
  44                 if (time_after(jiffies, timeout)) {
  45                         wl1251_error("command complete timeout");
  46                         ret = -ETIMEDOUT;
  47                         goto out;
  48                 }
  49
  50                 poll_count++;
  51                 if (poll_count < 30)
  52                         udelay(1);
  53                 else
  54                         msleep(1);
  55
  56                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  57         }
  58
  59         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
  60
  61         if (cmd->status != CMD_STATUS_SUCCESS)
  62                 wl1251_error("command %d returned %d", id, cmd->status);
  63
  64         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
  65                            WL1251_ACX_INTR_CMD_COMPLETE);
  66
  67 out:
  68         return ret;
  69 }
  70
  71 /**
  72  * send test command to firmware
  73  *
  74  * @wl: wl struct
  75  * @buf: buffer containing the command, with all headers, must work with dma
  76  * @len: length of the buffer
  77  * @answer: is answer needed
  78  */
  79 int wl1251_cmd_test(struct wl1251 *wl, void *buf, size_t buf_len, u8 answer)
  80 {
  81         int ret;
  82
  83         wl1251_debug(DEBUG_CMD, "cmd test");
  84
  85         ret = wl1251_cmd_send(wl, CMD_TEST, buf, buf_len);
  86
  87         if (ret < 0) {
  88                 wl1251_warning("TEST command failed");
  89                 return ret;
  90         }
  91
  92         if (answer) {
  93                 struct wl1251_command *cmd_answer;
  94
  95                 /*
  96                  * The test command got in, we can read the answer.
  97                  * The answer would be a wl1251_command, where the
  98                  * parameter array contains the actual answer.
  99                  */
 100                 wl1251_mem_read(wl, wl->cmd_box_addr, buf, buf_len);
 101
 102                 cmd_answer = buf;
 103
 104                 if (cmd_answer->header.status != CMD_STATUS_SUCCESS)
 105                         wl1251_error("TEST command answer error: %d",
 106                                      cmd_answer->header.status);
 107         }
 108
 109         return 0;
 110 }
 111
 112 /**
 113  * read acx from firmware
 114  *
 115  * @wl: wl struct
 116  * @id: acx id
 117  * @buf: buffer for the response, including all headers, must work with dma
 118  * @len: length of buf
 119  */
 120 int wl1251_cmd_interrogate(struct wl1251 *wl, u16 id, void *buf, size_t len)
 121 {
 122         struct acx_header *acx = buf;
 123         int ret;
 124
 125         wl1251_debug(DEBUG_CMD, "cmd interrogate");
 126
 127         acx->id = id;
 128
 129         /* payload length, does not include any headers */
 130         acx->len = len - sizeof(*acx);
 131
 132         ret = wl1251_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
 133         if (ret < 0) {
 134                 wl1251_error("INTERROGATE command failed");
 135                 goto out;
 136         }
 137
 138         /* the interrogate command got in, we can read the answer */
 139         wl1251_mem_read(wl, wl->cmd_box_addr, buf, len);
 140
 141         acx = buf;
 142         if (acx->cmd.status != CMD_STATUS_SUCCESS)
 143                 wl1251_error("INTERROGATE command error: %d",
 144                              acx->cmd.status);
 145
 146 out:
 147         return ret;
 148 }
 149
 150 /**
 151  * write acx value to firmware
 152  *
 153  * @wl: wl struct
 154  * @id: acx id
 155  * @buf: buffer containing acx, including all headers, must work with dma
 156  * @len: length of buf
 157  */
 158 int wl1251_cmd_configure(struct wl1251 *wl, u16 id, void *buf, size_t len)
 159 {
 160         struct acx_header *acx = buf;
 161         int ret;
 162
 163         wl1251_debug(DEBUG_CMD, "cmd configure");
 164
 165         acx->id = id;
 166
 167         /* payload length, does not include any headers */
 168         acx->len = len - sizeof(*acx);
 169
 170         ret = wl1251_cmd_send(wl, CMD_CONFIGURE, acx, len);
 171         if (ret < 0) {
 172                 wl1251_warning("CONFIGURE command NOK");
 173                 return ret;
 174         }
 175
 176         return 0;
 177 }
 178
 179 int wl1251_cmd_vbm(struct wl1251 *wl, u8 identity,
 180                    void *bitmap, u16 bitmap_len, u8 bitmap_control)
 181 {
 182         struct wl1251_cmd_vbm_update *vbm;
 183         int ret;
 184
 185         wl1251_debug(DEBUG_CMD, "cmd vbm");
 186
 187         vbm = kzalloc(sizeof(*vbm), GFP_KERNEL);
 188         if (!vbm) {
 189                 ret = -ENOMEM;
 190                 goto out;
 191         }
 192
 193         /* Count and period will be filled by the target */
 194         vbm->tim.bitmap_ctrl = bitmap_control;
 195         if (bitmap_len > PARTIAL_VBM_MAX) {
 196                 wl1251_warning("cmd vbm len is %d B, truncating to %d",
 197                                bitmap_len, PARTIAL_VBM_MAX);
 198                 bitmap_len = PARTIAL_VBM_MAX;
 199         }
 200         memcpy(vbm->tim.pvb_field, bitmap, bitmap_len);
 201         vbm->tim.identity = identity;
 202         vbm->tim.length = bitmap_len + 3;
 203
 204         vbm->len = cpu_to_le16(bitmap_len + 5);
 205
 206         ret = wl1251_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
 207         if (ret < 0) {
 208                 wl1251_error("VBM command failed");
 209                 goto out;
 210         }
 211
 212 out:
 213         kfree(vbm);
 214         return ret;
 215 }
 216
 217 int wl1251_cmd_data_path_rx(struct wl1251 *wl, u8 channel, bool enable)
 218 {
 219         struct cmd_enabledisable_path *cmd;
 220         int ret;
 221         u16 cmd_rx;
 222
 223         wl1251_debug(DEBUG_CMD, "cmd data path");
 224
 225         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 226         if (!cmd) {
 227                 ret = -ENOMEM;
 228                 goto out;
 229         }
 230
 231         cmd->channel = channel;
 232
 233         if (enable)
 234                 cmd_rx = CMD_ENABLE_RX;
 235         else
 236                 cmd_rx = CMD_DISABLE_RX;
 237
 238         ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
 239         if (ret < 0) {
 240                 wl1251_error("rx %s cmd for channel %d failed",
 241                              enable ? "start" : "stop", channel);
 242                 goto out;
 243         }
 244
 245         wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
 246                      enable ? "start" : "stop", channel);
 247
 248 out:
 249         kfree(cmd);
 250         return ret;
 251 }
 252
 253 int wl1251_cmd_data_path_tx(struct wl1251 *wl, u8 channel, bool enable)
 254 {
 255         struct cmd_enabledisable_path *cmd;
 256         int ret;
 257         u16 cmd_tx;
 258
 259         wl1251_debug(DEBUG_CMD, "cmd data path");
 260
 261         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 262         if (!cmd)
 263                 return -ENOMEM;
 264
 265         cmd->channel = channel;
 266
 267         if (enable)
 268                 cmd_tx = CMD_ENABLE_TX;
 269         else
 270                 cmd_tx = CMD_DISABLE_TX;
 271
 272         ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
 273         if (ret < 0)
 274                 wl1251_error("tx %s cmd for channel %d failed",
 275                              enable ? "start" : "stop", channel);
 276         else
 277                 wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
 278                              enable ? "start" : "stop", channel);
 279
 280         kfree(cmd);
 281         return ret;
 282 }
 283
 284 int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 285                     u16 beacon_interval, u8 dtim_interval)
 286 {
 287         struct cmd_join *join;
 288         int ret, i;
 289         u8 *bssid;
 290
 291         join = kzalloc(sizeof(*join), GFP_KERNEL);
 292         if (!join) {
 293                 ret = -ENOMEM;
 294                 goto out;
 295         }
 296
 297         wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
 298                      bss_type == BSS_TYPE_IBSS ? " ibss" : "",
 299                      channel, beacon_interval, dtim_interval);
 300
 301         /* Reverse order BSSID */
 302         bssid = (u8 *) &join->bssid_lsb;
 303         for (i = 0; i < ETH_ALEN; i++)
 304                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 305
 306         join->rx_config_options = wl->rx_config;
 307         join->rx_filter_options = wl->rx_filter;
 308
 309         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 310                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 311
 312         join->beacon_interval = beacon_interval;
 313         join->dtim_interval = dtim_interval;
 314         join->bss_type = bss_type;
 315         join->channel = channel;
 316         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 317
 318         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 319         if (ret < 0) {
 320                 wl1251_error("failed to initiate cmd join");
 321                 goto out;
 322         }
 323
 324 out:
 325         kfree(join);
 326         return ret;
 327 }
 328
 329 int wl1251_cmd_disconnect(struct wl1251 *wl)
 330 {
 331         struct wl1251_cmd_disconnect *cmd;
 332         int ret;
 333
 334         wl1251_debug(DEBUG_CMD, "cmd disconnect");
 335
 336         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 337         if (!cmd)
 338                 return -ENOMEM;
 339
 340         cmd->rx_config_options = wl->rx_config;
 341         cmd->rx_filter_options = 0;
 342
 343         ret = wl1251_cmd_send(wl, CMD_DISCONNECT, cmd, sizeof(*cmd));
 344         if (ret < 0)
 345                 wl1251_error("cmd disconnect failed: %d", ret);
 346
 347         kfree(cmd);
 348         return ret;
 349 }
 350
 351 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 352 {
 353         struct wl1251_cmd_ps_params *ps_params = NULL;
 354         int ret = 0;
 355
 356         wl1251_debug(DEBUG_CMD, "cmd set ps mode");
 357
 358         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 359         if (!ps_params) {
 360                 ret = -ENOMEM;
 361                 goto out;
 362         }
 363
 364         ps_params->ps_mode = ps_mode;
 365         ps_params->send_null_data = 1;
 366         ps_params->retries = 5;
 367         ps_params->hang_over_period = 128;
 368         ps_params->null_data_rate = 1; /* 1 Mbps */
 369
 370         ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 371                               sizeof(*ps_params));
 372         if (ret < 0) {
 373                 wl1251_error("cmd set_ps_mode failed");
 374                 goto out;
 375         }
 376
 377 out:
 378         kfree(ps_params);
 379         return ret;
 380 }
 381
 382 int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
 383                            size_t len)
 384 {
 385         struct cmd_read_write_memory *cmd;
 386         int ret = 0;
 387
 388         wl1251_debug(DEBUG_CMD, "cmd read memory");
 389
 390         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 391         if (!cmd) {
 392                 ret = -ENOMEM;
 393                 goto out;
 394         }
 395
 396         WARN_ON(len > MAX_READ_SIZE);
 397         len = min_t(size_t, len, MAX_READ_SIZE);
 398
 399         cmd->addr = addr;
 400         cmd->size = len;
 401
 402         ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 403         if (ret < 0) {
 404                 wl1251_error("read memory command failed: %d", ret);
 405                 goto out;
 406         }
 407
 408         /* the read command got in, we can now read the answer */
 409         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 410
 411         if (cmd->header.status != CMD_STATUS_SUCCESS)
 412                 wl1251_error("error in read command result: %d",
 413                              cmd->header.status);
 414
 415         memcpy(answer, cmd->value, len);
 416
 417 out:
 418         kfree(cmd);
 419         return ret;
 420 }
 421
 422 int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
 423                             void *buf, size_t buf_len)
 424 {
 425         struct wl1251_cmd_packet_template *cmd;
 426         size_t cmd_len;
 427         int ret = 0;
 428
 429         wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 430
 431         WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
 432         buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
 433         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 434
 435         cmd = kzalloc(cmd_len, GFP_KERNEL);
 436         if (!cmd) {
 437                 ret = -ENOMEM;
 438                 goto out;
 439         }
 440
 441         cmd->size = cpu_to_le16(buf_len);
 442
 443         if (buf)
 444                 memcpy(cmd->data, buf, buf_len);
 445
 446         ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
 447         if (ret < 0) {
 448                 wl1251_warning("cmd set_template failed: %d", ret);
 449                 goto out;
 450         }
 451
 452 out:
 453         kfree(cmd);
 454         return ret;
 455 }
 456
 457 int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
 458                     struct ieee80211_channel *channels[],
 459                     unsigned int n_channels, unsigned int n_probes)
 460 {
 461         struct wl1251_cmd_scan *cmd;
 462         int i, ret = 0;
 463
 464         wl1251_debug(DEBUG_CMD, "cmd scan channels %d", n_channels);
 465
 466         WARN_ON(n_channels > SCAN_MAX_NUM_OF_CHANNELS);
 467
 468         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 469         if (!cmd)
 470                 return -ENOMEM;
 471
 472         cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 473         cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
 474                                                     CFG_RX_MGMT_EN |
 475                                                     CFG_RX_BCN_EN);
 476         cmd->params.scan_options = 0;
 477         /*
 478          * Use high priority scan when not associated to prevent fw issue
 479          * causing never-ending scans (sometimes 20+ minutes).
 480          * Note: This bug may be caused by the fw's DTIM handling.
 481          */
 482         if (is_zero_ether_addr(wl->bssid))
 483                 cmd->params.scan_options |= cpu_to_le16(WL1251_SCAN_OPT_PRIORITY_HIGH);
 484         cmd->params.num_channels = n_channels;
 485         cmd->params.num_probe_requests = n_probes;
 486         cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 487         cmd->params.tid_trigger = 0;
 488
 489         for (i = 0; i < n_channels; i++) {
 490                 cmd->channels[i].min_duration =
 491                         cpu_to_le32(WL1251_SCAN_MIN_DURATION);
 492                 cmd->channels[i].max_duration =
 493                         cpu_to_le32(WL1251_SCAN_MAX_DURATION);
 494                 memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
 495                 memset(&cmd->channels[i].bssid_msb, 0xff, 2);
 496                 cmd->channels[i].early_termination = 0;
 497                 cmd->channels[i].tx_power_att = 0;
 498                 cmd->channels[i].channel = channels[i]->hw_value;
 499         }
 500
 501         cmd->params.ssid_len = ssid_len;
 502         if (ssid)
 503                 memcpy(cmd->params.ssid, ssid, ssid_len);
 504
 505         ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
 506         if (ret < 0) {
 507                 wl1251_error("cmd scan failed: %d", ret);
 508                 goto out;
 509         }
 510
 511         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 512
 513         if (cmd->header.status != CMD_STATUS_SUCCESS) {
 514                 wl1251_error("cmd scan status wasn't success: %d",
 515                              cmd->header.status);
 516                 ret = -EIO;
 517                 goto out;
 518         }
 519
 520 out:
 521         kfree(cmd);
 522         return ret;
 523 }
 524
 525 int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
 526 {
 527         struct wl1251_cmd_trigger_scan_to *cmd;
 528         int ret;
 529
 530         wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
 531
 532         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 533         if (!cmd)
 534                 return -ENOMEM;
 535
 536         cmd->timeout = timeout;
 537
 538         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
 539         if (ret < 0) {
 540                 wl1251_error("cmd trigger scan to failed: %d", ret);
 541                 goto out;
 542         }
 543
 544 out:
 545         kfree(cmd);
 546         return ret;
 547 }