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
   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(struct wl1251 *wl, u8 channel, bool enable)
 207 {
 208         struct cmd_enabledisable_path *cmd;
 209         int ret;
 210         u16 cmd_rx, cmd_tx;
 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                 cmd_tx = CMD_ENABLE_TX;
 225         } else {
 226                 cmd_rx = CMD_DISABLE_RX;
 227                 cmd_tx = CMD_DISABLE_TX;
 228         }
 229
 230         ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
 231         if (ret < 0) {
 232                 wl1251_error("rx %s cmd for channel %d failed",
 233                              enable ? "start" : "stop", channel);
 234                 goto out;
 235         }
 236
 237         wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
 238                      enable ? "start" : "stop", channel);
 239
 240         ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
 241         if (ret < 0) {
 242                 wl1251_error("tx %s cmd for channel %d failed",
 243                              enable ? "start" : "stop", channel);
 244                 return ret;
 245         }
 246
 247         wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
 248                      enable ? "start" : "stop", channel);
 249
 250 out:
 251         kfree(cmd);
 252         return ret;
 253 }
 254
 255 int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 256                     u16 beacon_interval, u8 dtim_interval)
 257 {
 258         struct cmd_join *join;
 259         int ret, i;
 260         u8 *bssid;
 261
 262         join = kzalloc(sizeof(*join), GFP_KERNEL);
 263         if (!join) {
 264                 ret = -ENOMEM;
 265                 goto out;
 266         }
 267
 268         wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
 269                      bss_type == BSS_TYPE_IBSS ? " ibss" : "",
 270                      channel, beacon_interval, dtim_interval);
 271
 272         /* Reverse order BSSID */
 273         bssid = (u8 *) &join->bssid_lsb;
 274         for (i = 0; i < ETH_ALEN; i++)
 275                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 276
 277         join->rx_config_options = wl->rx_config;
 278         join->rx_filter_options = wl->rx_filter;
 279
 280         /*
 281          * FIXME: disable temporarily all filters because after commit
 282          * 9cef8737 "mac80211: fix managed mode BSSID handling" broke
 283          * association. The filter logic needs to be implemented properly
 284          * and once that is done, this hack can be removed.
 285          */
 286         join->rx_config_options = 0;
 287         join->rx_filter_options = WL1251_DEFAULT_RX_FILTER;
 288
 289         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 290                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 291
 292         join->beacon_interval = beacon_interval;
 293         join->dtim_interval = dtim_interval;
 294         join->bss_type = bss_type;
 295         join->channel = channel;
 296         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 297
 298         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 299         if (ret < 0) {
 300                 wl1251_error("failed to initiate cmd join");
 301                 goto out;
 302         }
 303
 304 out:
 305         kfree(join);
 306         return ret;
 307 }
 308
 309 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 310 {
 311         struct wl1251_cmd_ps_params *ps_params = NULL;
 312         int ret = 0;
 313
 314         wl1251_debug(DEBUG_CMD, "cmd set ps mode");
 315
 316         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 317         if (!ps_params) {
 318                 ret = -ENOMEM;
 319                 goto out;
 320         }
 321
 322         ps_params->ps_mode = ps_mode;
 323         ps_params->send_null_data = 1;
 324         ps_params->retries = 5;
 325         ps_params->hang_over_period = 128;
 326         ps_params->null_data_rate = 1; /* 1 Mbps */
 327
 328         ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 329                               sizeof(*ps_params));
 330         if (ret < 0) {
 331                 wl1251_error("cmd set_ps_mode failed");
 332                 goto out;
 333         }
 334
 335 out:
 336         kfree(ps_params);
 337         return ret;
 338 }
 339
 340 int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
 341                            size_t len)
 342 {
 343         struct cmd_read_write_memory *cmd;
 344         int ret = 0;
 345
 346         wl1251_debug(DEBUG_CMD, "cmd read memory");
 347
 348         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 349         if (!cmd) {
 350                 ret = -ENOMEM;
 351                 goto out;
 352         }
 353
 354         WARN_ON(len > MAX_READ_SIZE);
 355         len = min_t(size_t, len, MAX_READ_SIZE);
 356
 357         cmd->addr = addr;
 358         cmd->size = len;
 359
 360         ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 361         if (ret < 0) {
 362                 wl1251_error("read memory command failed: %d", ret);
 363                 goto out;
 364         }
 365
 366         /* the read command got in, we can now read the answer */
 367         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 368
 369         if (cmd->header.status != CMD_STATUS_SUCCESS)
 370                 wl1251_error("error in read command result: %d",
 371                              cmd->header.status);
 372
 373         memcpy(answer, cmd->value, len);
 374
 375 out:
 376         kfree(cmd);
 377         return ret;
 378 }
 379
 380 int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
 381                             void *buf, size_t buf_len)
 382 {
 383         struct wl1251_cmd_packet_template *cmd;
 384         size_t cmd_len;
 385         int ret = 0;
 386
 387         wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 388
 389         WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
 390         buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
 391         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 392
 393         cmd = kzalloc(cmd_len, GFP_KERNEL);
 394         if (!cmd) {
 395                 ret = -ENOMEM;
 396                 goto out;
 397         }
 398
 399         cmd->size = cpu_to_le16(buf_len);
 400
 401         if (buf)
 402                 memcpy(cmd->data, buf, buf_len);
 403
 404         ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
 405         if (ret < 0) {
 406                 wl1251_warning("cmd set_template failed: %d", ret);
 407                 goto out;
 408         }
 409
 410 out:
 411         kfree(cmd);
 412         return ret;
 413 }
 414
 415 int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
 416                     struct ieee80211_channel *channels[],
 417                     unsigned int n_channels, unsigned int n_probes)
 418 {
 419         struct wl1251_cmd_scan *cmd;
 420         int i, ret = 0;
 421
 422         wl1251_debug(DEBUG_CMD, "cmd scan");
 423
 424         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 425         if (!cmd)
 426                 return -ENOMEM;
 427
 428         cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 429         cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
 430                                                     CFG_RX_MGMT_EN |
 431                                                     CFG_RX_BCN_EN);
 432         cmd->params.scan_options = 0;
 433         cmd->params.num_channels = n_channels;
 434         cmd->params.num_probe_requests = n_probes;
 435         cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 436         cmd->params.tid_trigger = 0;
 437
 438         for (i = 0; i < n_channels; i++) {
 439                 cmd->channels[i].min_duration =
 440                         cpu_to_le32(WL1251_SCAN_MIN_DURATION);
 441                 cmd->channels[i].max_duration =
 442                         cpu_to_le32(WL1251_SCAN_MAX_DURATION);
 443                 memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
 444                 memset(&cmd->channels[i].bssid_msb, 0xff, 2);
 445                 cmd->channels[i].early_termination = 0;
 446                 cmd->channels[i].tx_power_att = 0;
 447                 cmd->channels[i].channel = channels[i]->hw_value;
 448         }
 449
 450         cmd->params.ssid_len = ssid_len;
 451         if (ssid)
 452                 memcpy(cmd->params.ssid, ssid, ssid_len);
 453
 454         ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
 455         if (ret < 0) {
 456                 wl1251_error("cmd scan failed: %d", ret);
 457                 goto out;
 458         }
 459
 460         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 461
 462         if (cmd->header.status != CMD_STATUS_SUCCESS) {
 463                 wl1251_error("cmd scan status wasn't success: %d",
 464                              cmd->header.status);
 465                 ret = -EIO;
 466                 goto out;
 467         }
 468
 469 out:
 470         kfree(cmd);
 471         return ret;
 472 }
 473
 474 int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
 475 {
 476         struct wl1251_cmd_trigger_scan_to *cmd;
 477         int ret;
 478
 479         wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
 480
 481         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 482         if (!cmd)
 483                 return -ENOMEM;
 484
 485         cmd->timeout = timeout;
 486
 487         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
 488         if (ret < 0) {
 489                 wl1251_error("cmd trigger scan to failed: %d", ret);
 490                 goto out;
 491         }
 492
 493 out:
 494         kfree(cmd);
 495         return ret;
 496 }