drivers/net/wireless/wl12xx/wl1251_cmd.c

   1 #include "wl1251_cmd.h"
   2
   3 #include <linux/module.h>
   4 #include <linux/crc7.h>
   5
   6 #include "wl1251.h"
   7 #include "reg.h"
   8 #include "wl1251_io.h"
   9 #include "wl1251_ps.h"
  10 #include "wl1251_acx.h"
  11
  12 /**
  13  * send command to firmware
  14  *
  15  * @wl: wl struct
  16  * @id: command id
  17  * @buf: buffer containing the command, must work with dma
  18  * @len: length of the buffer
  19  */
  20 int wl1251_cmd_send(struct wl1251 *wl, u16 id, void *buf, size_t len)
  21 {
  22         struct wl1251_cmd_header *cmd;
  23         unsigned long timeout;
  24         u32 intr;
  25         int ret = 0;
  26
  27         cmd = buf;
  28         cmd->id = id;
  29         cmd->status = 0;
  30
  31         WARN_ON(len % 4 != 0);
  32
  33         wl1251_mem_write(wl, wl->cmd_box_addr, buf, len);
  34
  35         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);
  36
  37         timeout = jiffies + msecs_to_jiffies(WL1251_COMMAND_TIMEOUT);
  38
  39         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  40         while (!(intr & wl->chip.intr_cmd_complete)) {
  41                 if (time_after(jiffies, timeout)) {
  42                         wl1251_error("command complete timeout");
  43                         ret = -ETIMEDOUT;
  44                         goto out;
  45                 }
  46
  47                 msleep(1);
  48
  49                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  50         }
  51
  52         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
  53                            wl->chip.intr_cmd_complete);
  54
  55 out:
  56         return ret;
  57 }
  58
  59 /**
  60  * send test command to firmware
  61  *
  62  * @wl: wl struct
  63  * @buf: buffer containing the command, with all headers, must work with dma
  64  * @len: length of the buffer
  65  * @answer: is answer needed
  66  */
  67 int wl1251_cmd_test(struct wl1251 *wl, void *buf, size_t buf_len, u8 answer)
  68 {
  69         int ret;
  70
  71         wl1251_debug(DEBUG_CMD, "cmd test");
  72
  73         ret = wl1251_cmd_send(wl, CMD_TEST, buf, buf_len);
  74
  75         if (ret < 0) {
  76                 wl1251_warning("TEST command failed");
  77                 return ret;
  78         }
  79
  80         if (answer) {
  81                 struct wl1251_command *cmd_answer;
  82
  83                 /*
  84                  * The test command got in, we can read the answer.
  85                  * The answer would be a wl1251_command, where the
  86                  * parameter array contains the actual answer.
  87                  */
  88                 wl1251_mem_read(wl, wl->cmd_box_addr, buf, buf_len);
  89
  90                 cmd_answer = buf;
  91
  92                 if (cmd_answer->header.status != CMD_STATUS_SUCCESS)
  93                         wl1251_error("TEST command answer error: %d",
  94                                      cmd_answer->header.status);
  95         }
  96
  97         return 0;
  98 }
  99
 100 /**
 101  * read acx from firmware
 102  *
 103  * @wl: wl struct
 104  * @id: acx id
 105  * @buf: buffer for the response, including all headers, must work with dma
 106  * @len: lenght of buf
 107  */
 108 int wl1251_cmd_interrogate(struct wl1251 *wl, u16 id, void *buf, size_t len)
 109 {
 110         struct acx_header *acx = buf;
 111         int ret;
 112
 113         wl1251_debug(DEBUG_CMD, "cmd interrogate");
 114
 115         acx->id = id;
 116
 117         /* payload length, does not include any headers */
 118         acx->len = len - sizeof(*acx);
 119
 120         ret = wl1251_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
 121         if (ret < 0) {
 122                 wl1251_error("INTERROGATE command failed");
 123                 goto out;
 124         }
 125
 126         /* the interrogate command got in, we can read the answer */
 127         wl1251_mem_read(wl, wl->cmd_box_addr, buf, len);
 128
 129         acx = buf;
 130         if (acx->cmd.status != CMD_STATUS_SUCCESS)
 131                 wl1251_error("INTERROGATE command error: %d",
 132                              acx->cmd.status);
 133
 134 out:
 135         return ret;
 136 }
 137
 138 /**
 139  * write acx value to firmware
 140  *
 141  * @wl: wl struct
 142  * @id: acx id
 143  * @buf: buffer containing acx, including all headers, must work with dma
 144  * @len: length of buf
 145  */
 146 int wl1251_cmd_configure(struct wl1251 *wl, u16 id, void *buf, size_t len)
 147 {
 148         struct acx_header *acx = buf;
 149         int ret;
 150
 151         wl1251_debug(DEBUG_CMD, "cmd configure");
 152
 153         acx->id = id;
 154
 155         /* payload length, does not include any headers */
 156         acx->len = len - sizeof(*acx);
 157
 158         ret = wl1251_cmd_send(wl, CMD_CONFIGURE, acx, len);
 159         if (ret < 0) {
 160                 wl1251_warning("CONFIGURE command NOK");
 161                 return ret;
 162         }
 163
 164         return 0;
 165 }
 166
 167 int wl1251_cmd_vbm(struct wl1251 *wl, u8 identity,
 168                    void *bitmap, u16 bitmap_len, u8 bitmap_control)
 169 {
 170         struct wl1251_cmd_vbm_update *vbm;
 171         int ret;
 172
 173         wl1251_debug(DEBUG_CMD, "cmd vbm");
 174
 175         vbm = kzalloc(sizeof(*vbm), GFP_KERNEL);
 176         if (!vbm) {
 177                 ret = -ENOMEM;
 178                 goto out;
 179         }
 180
 181         /* Count and period will be filled by the target */
 182         vbm->tim.bitmap_ctrl = bitmap_control;
 183         if (bitmap_len > PARTIAL_VBM_MAX) {
 184                 wl1251_warning("cmd vbm len is %d B, truncating to %d",
 185                                bitmap_len, PARTIAL_VBM_MAX);
 186                 bitmap_len = PARTIAL_VBM_MAX;
 187         }
 188         memcpy(vbm->tim.pvb_field, bitmap, bitmap_len);
 189         vbm->tim.identity = identity;
 190         vbm->tim.length = bitmap_len + 3;
 191
 192         vbm->len = cpu_to_le16(bitmap_len + 5);
 193
 194         ret = wl1251_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
 195         if (ret < 0) {
 196                 wl1251_error("VBM command failed");
 197                 goto out;
 198         }
 199
 200 out:
 201         kfree(vbm);
 202         return 0;
 203 }
 204
 205 int wl1251_cmd_data_path(struct wl1251 *wl, u8 channel, bool enable)
 206 {
 207         struct cmd_enabledisable_path *cmd;
 208         int ret;
 209         u16 cmd_rx, cmd_tx;
 210
 211         wl1251_debug(DEBUG_CMD, "cmd data path");
 212
 213         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 214         if (!cmd) {
 215                 ret = -ENOMEM;
 216                 goto out;
 217         }
 218
 219         cmd->channel = channel;
 220
 221         if (enable) {
 222                 cmd_rx = CMD_ENABLE_RX;
 223                 cmd_tx = CMD_ENABLE_TX;
 224         } else {
 225                 cmd_rx = CMD_DISABLE_RX;
 226                 cmd_tx = CMD_DISABLE_TX;
 227         }
 228
 229         ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
 230         if (ret < 0) {
 231                 wl1251_error("rx %s cmd for channel %d failed",
 232                              enable ? "start" : "stop", channel);
 233                 goto out;
 234         }
 235
 236         wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
 237                      enable ? "start" : "stop", channel);
 238
 239         ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
 240         if (ret < 0) {
 241                 wl1251_error("tx %s cmd for channel %d failed",
 242                              enable ? "start" : "stop", channel);
 243                 return ret;
 244         }
 245
 246         wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
 247                      enable ? "start" : "stop", channel);
 248
 249 out:
 250         kfree(cmd);
 251         return ret;
 252 }
 253
 254 int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 dtim_interval,
 255                     u16 beacon_interval, u8 wait)
 256 {
 257         unsigned long timeout;
 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         /* FIXME: this should be in main.c */
 269         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 270                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 271                                      wl->tx_mgmt_frm_rate,
 272                                      wl->tx_mgmt_frm_mod);
 273         if (ret < 0)
 274                 goto out;
 275
 276         wl1251_debug(DEBUG_CMD, "cmd join");
 277
 278         /* Reverse order BSSID */
 279         bssid = (u8 *) &join->bssid_lsb;
 280         for (i = 0; i < ETH_ALEN; i++)
 281                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 282
 283         join->rx_config_options = wl->rx_config;
 284         join->rx_filter_options = wl->rx_filter;
 285
 286         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 287                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 288
 289         join->beacon_interval = beacon_interval;
 290         join->dtim_interval = dtim_interval;
 291         join->bss_type = bss_type;
 292         join->channel = wl->channel;
 293         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 294
 295         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 296         if (ret < 0) {
 297                 wl1251_error("failed to initiate cmd join");
 298                 goto out;
 299         }
 300
 301         timeout = msecs_to_jiffies(JOIN_TIMEOUT);
 302
 303         /*
 304          * ugly hack: we should wait for JOIN_EVENT_COMPLETE_ID but to
 305          * simplify locking we just sleep instead, for now
 306          */
 307         if (wait)
 308                 msleep(10);
 309
 310 out:
 311         kfree(join);
 312         return ret;
 313 }
 314
 315 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 316 {
 317         struct wl1251_cmd_ps_params *ps_params = NULL;
 318         int ret = 0;
 319
 320         /* FIXME: this should be in ps.c */
 321         ret = wl1251_acx_wake_up_conditions(wl, WAKE_UP_EVENT_DTIM_BITMAP,
 322                                             wl->listen_int);
 323         if (ret < 0) {
 324                 wl1251_error("couldn't set wake up conditions");
 325                 goto out;
 326         }
 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 }