drivers/net/wireless/wl12xx/cmd.c

   1 #include "cmd.h"
   2
   3 #include <linux/module.h>
   4 #include <linux/crc7.h>
   5 #include <linux/spi/spi.h>
   6
   7 #include "wl12xx.h"
   8 #include "wl12xx_80211.h"
   9 #include "reg.h"
  10 #include "spi.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 wl12xx_cmd_send(struct wl12xx *wl, u16 id, void *buf, size_t len)
  23 {
  24         struct wl12xx_cmd_header *cmd;
  25         unsigned long timeout;
  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         wl12xx_spi_mem_write(wl, wl->cmd_box_addr, buf, len);
  36
  37         wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);
  38
  39         timeout = jiffies + msecs_to_jiffies(WL12XX_COMMAND_TIMEOUT);
  40
  41         intr = wl12xx_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  42         while (!(intr & wl->chip.intr_cmd_complete)) {
  43                 if (time_after(jiffies, timeout)) {
  44                         wl12xx_error("command complete timeout");
  45                         ret = -ETIMEDOUT;
  46                         goto out;
  47                 }
  48
  49                 msleep(1);
  50
  51                 intr = wl12xx_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  52         }
  53
  54         wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
  55                            wl->chip.intr_cmd_complete);
  56
  57 out:
  58         return ret;
  59 }
  60
  61 /**
  62  * send test command to firmware
  63  *
  64  * @wl: wl struct
  65  * @buf: buffer containing the command, with all headers, must work with dma
  66  * @len: length of the buffer
  67  * @answer: is answer needed
  68  */
  69 int wl12xx_cmd_test(struct wl12xx *wl, void *buf, size_t buf_len, u8 answer)
  70 {
  71         int ret;
  72
  73         wl12xx_debug(DEBUG_CMD, "cmd test");
  74
  75         ret = wl12xx_cmd_send(wl, CMD_TEST, buf, buf_len);
  76
  77         if (ret < 0) {
  78                 wl12xx_warning("TEST command failed");
  79                 return ret;
  80         }
  81
  82         if (answer) {
  83                 struct wl12xx_command *cmd_answer;
  84
  85                 /*
  86                  * The test command got in, we can read the answer.
  87                  * The answer would be a wl12xx_command, where the
  88                  * parameter array contains the actual answer.
  89                  */
  90                 wl12xx_spi_mem_read(wl, wl->cmd_box_addr, buf, buf_len);
  91
  92                 cmd_answer = buf;
  93
  94                 if (cmd_answer->header.status != CMD_STATUS_SUCCESS)
  95                         wl12xx_error("TEST command answer error: %d",
  96                                      cmd_answer->header.status);
  97         }
  98
  99         return 0;
 100 }
 101
 102 /**
 103  * read acx from firmware
 104  *
 105  * @wl: wl struct
 106  * @id: acx id
 107  * @buf: buffer for the response, including all headers, must work with dma
 108  * @len: lenght of buf
 109  */
 110 int wl12xx_cmd_interrogate(struct wl12xx *wl, u16 id, void *buf, size_t len)
 111 {
 112         struct acx_header *acx = buf;
 113         int ret;
 114
 115         wl12xx_debug(DEBUG_CMD, "cmd interrogate");
 116
 117         acx->id = id;
 118
 119         /* payload length, does not include any headers */
 120         acx->len = len - sizeof(*acx);
 121
 122         ret = wl12xx_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
 123         if (ret < 0) {
 124                 wl12xx_error("INTERROGATE command failed");
 125                 goto out;
 126         }
 127
 128         /* the interrogate command got in, we can read the answer */
 129         wl12xx_spi_mem_read(wl, wl->cmd_box_addr, buf, len);
 130
 131         acx = buf;
 132         if (acx->cmd.status != CMD_STATUS_SUCCESS)
 133                 wl12xx_error("INTERROGATE command error: %d",
 134                              acx->cmd.status);
 135
 136 out:
 137         return ret;
 138 }
 139
 140 /**
 141  * write acx value to firmware
 142  *
 143  * @wl: wl struct
 144  * @id: acx id
 145  * @buf: buffer containing acx, including all headers, must work with dma
 146  * @len: length of buf
 147  */
 148 int wl12xx_cmd_configure(struct wl12xx *wl, u16 id, void *buf, size_t len)
 149 {
 150         struct acx_header *acx = buf;
 151         int ret;
 152
 153         wl12xx_debug(DEBUG_CMD, "cmd configure");
 154
 155         acx->id = id;
 156
 157         /* payload length, does not include any headers */
 158         acx->len = len - sizeof(*acx);
 159
 160         ret = wl12xx_cmd_send(wl, CMD_CONFIGURE, acx, len);
 161         if (ret < 0) {
 162                 wl12xx_warning("CONFIGURE command NOK");
 163                 return ret;
 164         }
 165
 166         return 0;
 167 }
 168
 169 int wl12xx_cmd_vbm(struct wl12xx *wl, u8 identity,
 170                    void *bitmap, u16 bitmap_len, u8 bitmap_control)
 171 {
 172         struct wl12xx_cmd_vbm_update *vbm;
 173         int ret;
 174
 175         wl12xx_debug(DEBUG_CMD, "cmd vbm");
 176
 177         vbm = kzalloc(sizeof(*vbm), GFP_KERNEL);
 178         if (!vbm) {
 179                 ret = -ENOMEM;
 180                 goto out;
 181         }
 182
 183         /* Count and period will be filled by the target */
 184         vbm->tim.bitmap_ctrl = bitmap_control;
 185         if (bitmap_len > PARTIAL_VBM_MAX) {
 186                 wl12xx_warning("cmd vbm len is %d B, truncating to %d",
 187                                bitmap_len, PARTIAL_VBM_MAX);
 188                 bitmap_len = PARTIAL_VBM_MAX;
 189         }
 190         memcpy(vbm->tim.pvb_field, bitmap, bitmap_len);
 191         vbm->tim.identity = identity;
 192         vbm->tim.length = bitmap_len + 3;
 193
 194         vbm->len = cpu_to_le16(bitmap_len + 5);
 195
 196         ret = wl12xx_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
 197         if (ret < 0) {
 198                 wl12xx_error("VBM command failed");
 199                 goto out;
 200         }
 201
 202 out:
 203         kfree(vbm);
 204         return 0;
 205 }
 206
 207 int wl12xx_cmd_data_path(struct wl12xx *wl, u8 channel, bool enable)
 208 {
 209         struct cmd_enabledisable_path *cmd;
 210         int ret;
 211         u16 cmd_rx, cmd_tx;
 212
 213         wl12xx_debug(DEBUG_CMD, "cmd data path");
 214
 215         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 216         if (!cmd) {
 217                 ret = -ENOMEM;
 218                 goto out;
 219         }
 220
 221         cmd->channel = channel;
 222
 223         if (enable) {
 224                 cmd_rx = CMD_ENABLE_RX;
 225                 cmd_tx = CMD_ENABLE_TX;
 226         } else {
 227                 cmd_rx = CMD_DISABLE_RX;
 228                 cmd_tx = CMD_DISABLE_TX;
 229         }
 230
 231         ret = wl12xx_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
 232         if (ret < 0) {
 233                 wl12xx_error("rx %s cmd for channel %d failed",
 234                              enable ? "start" : "stop", channel);
 235                 goto out;
 236         }
 237
 238         wl12xx_debug(DEBUG_BOOT, "rx %s cmd channel %d",
 239                      enable ? "start" : "stop", channel);
 240
 241         ret = wl12xx_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
 242         if (ret < 0) {
 243                 wl12xx_error("tx %s cmd for channel %d failed",
 244                              enable ? "start" : "stop", channel);
 245                 return ret;
 246         }
 247
 248         wl12xx_debug(DEBUG_BOOT, "tx %s cmd channel %d",
 249                      enable ? "start" : "stop", channel);
 250
 251 out:
 252         kfree(cmd);
 253         return ret;
 254 }
 255
 256 int wl1251_cmd_join(struct wl12xx *wl, u8 bss_type, u8 dtim_interval,
 257                     u16 beacon_interval, u8 wait)
 258 {
 259         unsigned long timeout;
 260         struct cmd_join *join;
 261         int ret, i;
 262         u8 *bssid;
 263
 264         join = kzalloc(sizeof(*join), GFP_KERNEL);
 265         if (!join) {
 266                 ret = -ENOMEM;
 267                 goto out;
 268         }
 269
 270         /* FIXME: this should be in main.c */
 271         ret = wl12xx_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 272                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 273                                      wl->tx_mgmt_frm_rate,
 274                                      wl->tx_mgmt_frm_mod);
 275         if (ret < 0)
 276                 goto out;
 277
 278         wl12xx_debug(DEBUG_CMD, "cmd join");
 279
 280         /* Reverse order BSSID */
 281         bssid = (u8 *) &join->bssid_lsb;
 282         for (i = 0; i < ETH_ALEN; i++)
 283                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 284
 285         join->rx_config_options = wl->rx_config;
 286         join->rx_filter_options = wl->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 = wl->channel;
 295         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 296
 297         ret = wl12xx_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 298         if (ret < 0) {
 299                 wl12xx_error("failed to initiate cmd join");
 300                 goto out;
 301         }
 302
 303         timeout = msecs_to_jiffies(JOIN_TIMEOUT);
 304
 305         /*
 306          * ugly hack: we should wait for JOIN_EVENT_COMPLETE_ID but to
 307          * simplify locking we just sleep instead, for now
 308          */
 309         if (wait)
 310                 msleep(10);
 311
 312 out:
 313         kfree(join);
 314         return ret;
 315 }
 316
 317 int wl12xx_cmd_ps_mode(struct wl12xx *wl, u8 ps_mode)
 318 {
 319         struct wl12xx_cmd_ps_params *ps_params = NULL;
 320         int ret = 0;
 321
 322         /* FIXME: this should be in ps.c */
 323         ret = wl12xx_acx_wake_up_conditions(wl, WAKE_UP_EVENT_DTIM_BITMAP,
 324                                             wl->listen_int);
 325         if (ret < 0) {
 326                 wl12xx_error("couldn't set wake up conditions");
 327                 goto out;
 328         }
 329
 330         wl12xx_debug(DEBUG_CMD, "cmd set ps mode");
 331
 332         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 333         if (!ps_params) {
 334                 ret = -ENOMEM;
 335                 goto out;
 336         }
 337
 338         ps_params->ps_mode = ps_mode;
 339         ps_params->send_null_data = 1;
 340         ps_params->retries = 5;
 341         ps_params->hang_over_period = 128;
 342         ps_params->null_data_rate = 1; /* 1 Mbps */
 343
 344         ret = wl12xx_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 345                               sizeof(*ps_params));
 346         if (ret < 0) {
 347                 wl12xx_error("cmd set_ps_mode failed");
 348                 goto out;
 349         }
 350
 351 out:
 352         kfree(ps_params);
 353         return ret;
 354 }
 355
 356 int wl12xx_cmd_read_memory(struct wl12xx *wl, u32 addr, void *answer,
 357                            size_t len)
 358 {
 359         struct cmd_read_write_memory *cmd;
 360         int ret = 0;
 361
 362         wl12xx_debug(DEBUG_CMD, "cmd read memory");
 363
 364         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 365         if (!cmd) {
 366                 ret = -ENOMEM;
 367                 goto out;
 368         }
 369
 370         WARN_ON(len > MAX_READ_SIZE);
 371         len = min_t(size_t, len, MAX_READ_SIZE);
 372
 373         cmd->addr = addr;
 374         cmd->size = len;
 375
 376         ret = wl12xx_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 377         if (ret < 0) {
 378                 wl12xx_error("read memory command failed: %d", ret);
 379                 goto out;
 380         }
 381
 382         /* the read command got in, we can now read the answer */
 383         wl12xx_spi_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 384
 385         if (cmd->header.status != CMD_STATUS_SUCCESS)
 386                 wl12xx_error("error in read command result: %d",
 387                              cmd->header.status);
 388
 389         memcpy(answer, cmd->value, len);
 390
 391 out:
 392         kfree(cmd);
 393         return ret;
 394 }
 395
 396 int wl12xx_cmd_template_set(struct wl12xx *wl, u16 cmd_id,
 397                             void *buf, size_t buf_len)
 398 {
 399         struct wl12xx_cmd_packet_template *cmd;
 400         size_t cmd_len;
 401         int ret = 0;
 402
 403         wl12xx_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 404
 405         WARN_ON(buf_len > WL12XX_MAX_TEMPLATE_SIZE);
 406         buf_len = min_t(size_t, buf_len, WL12XX_MAX_TEMPLATE_SIZE);
 407         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 408
 409         cmd = kzalloc(cmd_len, GFP_KERNEL);
 410         if (!cmd) {
 411                 ret = -ENOMEM;
 412                 goto out;
 413         }
 414
 415         cmd->size = cpu_to_le16(buf_len);
 416
 417         if (buf)
 418                 memcpy(cmd->data, buf, buf_len);
 419
 420         ret = wl12xx_cmd_send(wl, cmd_id, cmd, cmd_len);
 421         if (ret < 0) {
 422                 wl12xx_warning("cmd set_template failed: %d", ret);
 423                 goto out;
 424         }
 425
 426 out:
 427         kfree(cmd);
 428         return ret;
 429 }