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 "wl1251_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 & WL1251_ACX_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                            WL1251_ACX_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 channel,
 255                     u16 beacon_interval, u8 dtim_interval)
 256 {
 257         struct cmd_join *join;
 258         int ret, i;
 259         u8 *bssid;
 260
 261         join = kzalloc(sizeof(*join), GFP_KERNEL);
 262         if (!join) {
 263                 ret = -ENOMEM;
 264                 goto out;
 265         }
 266
 267         wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
 268                      bss_type == BSS_TYPE_IBSS ? " ibss" : "",
 269                      channel, beacon_interval, dtim_interval);
 270
 271         /* Reverse order BSSID */
 272         bssid = (u8 *) &join->bssid_lsb;
 273         for (i = 0; i < ETH_ALEN; i++)
 274                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 275
 276         join->rx_config_options = wl->rx_config;
 277         join->rx_filter_options = wl->rx_filter;
 278
 279         /*
 280          * FIXME: disable temporarily all filters because after commit
 281          * 9cef8737 "mac80211: fix managed mode BSSID handling" broke
 282          * association. The filter logic needs to be implemented properly
 283          * and once that is done, this hack can be removed.
 284          */
 285         join->rx_config_options = 0;
 286         join->rx_filter_options = WL1251_DEFAULT_RX_FILTER;
 287
 288         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 289                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 290
 291         join->beacon_interval = beacon_interval;
 292         join->dtim_interval = dtim_interval;
 293         join->bss_type = bss_type;
 294         join->channel = channel;
 295         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 296
 297         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 298         if (ret < 0) {
 299                 wl1251_error("failed to initiate cmd join");
 300                 goto out;
 301         }
 302
 303 out:
 304         kfree(join);
 305         return ret;
 306 }
 307
 308 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 309 {
 310         struct wl1251_cmd_ps_params *ps_params = NULL;
 311         int ret = 0;
 312
 313         wl1251_debug(DEBUG_CMD, "cmd set ps mode");
 314
 315         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 316         if (!ps_params) {
 317                 ret = -ENOMEM;
 318                 goto out;
 319         }
 320
 321         ps_params->ps_mode = ps_mode;
 322         ps_params->send_null_data = 1;
 323         ps_params->retries = 5;
 324         ps_params->hang_over_period = 128;
 325         ps_params->null_data_rate = 1; /* 1 Mbps */
 326
 327         ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 328                               sizeof(*ps_params));
 329         if (ret < 0) {
 330                 wl1251_error("cmd set_ps_mode failed");
 331                 goto out;
 332         }
 333
 334 out:
 335         kfree(ps_params);
 336         return ret;
 337 }
 338
 339 int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
 340                            size_t len)
 341 {
 342         struct cmd_read_write_memory *cmd;
 343         int ret = 0;
 344
 345         wl1251_debug(DEBUG_CMD, "cmd read memory");
 346
 347         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 348         if (!cmd) {
 349                 ret = -ENOMEM;
 350                 goto out;
 351         }
 352
 353         WARN_ON(len > MAX_READ_SIZE);
 354         len = min_t(size_t, len, MAX_READ_SIZE);
 355
 356         cmd->addr = addr;
 357         cmd->size = len;
 358
 359         ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 360         if (ret < 0) {
 361                 wl1251_error("read memory command failed: %d", ret);
 362                 goto out;
 363         }
 364
 365         /* the read command got in, we can now read the answer */
 366         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 367
 368         if (cmd->header.status != CMD_STATUS_SUCCESS)
 369                 wl1251_error("error in read command result: %d",
 370                              cmd->header.status);
 371
 372         memcpy(answer, cmd->value, len);
 373
 374 out:
 375         kfree(cmd);
 376         return ret;
 377 }
 378
 379 int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
 380                             void *buf, size_t buf_len)
 381 {
 382         struct wl1251_cmd_packet_template *cmd;
 383         size_t cmd_len;
 384         int ret = 0;
 385
 386         wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 387
 388         WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
 389         buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
 390         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 391
 392         cmd = kzalloc(cmd_len, GFP_KERNEL);
 393         if (!cmd) {
 394                 ret = -ENOMEM;
 395                 goto out;
 396         }
 397
 398         cmd->size = cpu_to_le16(buf_len);
 399
 400         if (buf)
 401                 memcpy(cmd->data, buf, buf_len);
 402
 403         ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
 404         if (ret < 0) {
 405                 wl1251_warning("cmd set_template failed: %d", ret);
 406                 goto out;
 407         }
 408
 409 out:
 410         kfree(cmd);
 411         return ret;
 412 }