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