drivers/net/wireless/ti/wl1251/cmd.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "cmd.h"
   3
   4 #include <linux/module.h>
   5 #include <linux/slab.h>
   6 #include <linux/etherdevice.h>
   7
   8 #include "wl1251.h"
   9 #include "reg.h"
  10 #include "io.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 wl1251_cmd_send(struct wl1251 *wl, u16 id, void *buf, size_t len)
  23 {
  24         struct wl1251_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         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                 msleep(1);
  50
  51                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
  52         }
  53
  54         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
  55                            WL1251_ACX_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 wl1251_cmd_test(struct wl1251 *wl, void *buf, size_t buf_len, u8 answer)
  70 {
  71         int ret;
  72
  73         wl1251_debug(DEBUG_CMD, "cmd test");
  74
  75         ret = wl1251_cmd_send(wl, CMD_TEST, buf, buf_len);
  76
  77         if (ret < 0) {
  78                 wl1251_warning("TEST command failed");
  79                 return ret;
  80         }
  81
  82         if (answer) {
  83                 struct wl1251_command *cmd_answer;
  84
  85                 /*
  86                  * The test command got in, we can read the answer.
  87                  * The answer would be a wl1251_command, where the
  88                  * parameter array contains the actual answer.
  89                  */
  90                 wl1251_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                         wl1251_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: length of buf
 109  */
 110 int wl1251_cmd_interrogate(struct wl1251 *wl, u16 id, void *buf, size_t len)
 111 {
 112         struct acx_header *acx = buf;
 113         int ret;
 114
 115         wl1251_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 = wl1251_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
 123         if (ret < 0) {
 124                 wl1251_error("INTERROGATE command failed");
 125                 goto out;
 126         }
 127
 128         /* the interrogate command got in, we can read the answer */
 129         wl1251_mem_read(wl, wl->cmd_box_addr, buf, len);
 130
 131         acx = buf;
 132         if (acx->cmd.status != CMD_STATUS_SUCCESS)
 133                 wl1251_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 wl1251_cmd_configure(struct wl1251 *wl, u16 id, void *buf, size_t len)
 149 {
 150         struct acx_header *acx = buf;
 151         int ret;
 152
 153         wl1251_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 = wl1251_cmd_send(wl, CMD_CONFIGURE, acx, len);
 161         if (ret < 0) {
 162                 wl1251_warning("CONFIGURE command NOK");
 163                 return ret;
 164         }
 165
 166         return 0;
 167 }
 168
 169 int wl1251_cmd_vbm(struct wl1251 *wl, u8 identity,
 170                    void *bitmap, u16 bitmap_len, u8 bitmap_control)
 171 {
 172         struct wl1251_cmd_vbm_update *vbm;
 173         int ret;
 174
 175         wl1251_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                 wl1251_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 = wl1251_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
 197         if (ret < 0) {
 198                 wl1251_error("VBM command failed");
 199                 goto out;
 200         }
 201
 202 out:
 203         kfree(vbm);
 204         return ret;
 205 }
 206
 207 int wl1251_cmd_data_path_rx(struct wl1251 *wl, u8 channel, bool enable)
 208 {
 209         struct cmd_enabledisable_path *cmd;
 210         int ret;
 211         u16 cmd_rx;
 212
 213         wl1251_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         else
 226                 cmd_rx = CMD_DISABLE_RX;
 227
 228         ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
 229         if (ret < 0) {
 230                 wl1251_error("rx %s cmd for channel %d failed",
 231                              enable ? "start" : "stop", channel);
 232                 goto out;
 233         }
 234
 235         wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
 236                      enable ? "start" : "stop", channel);
 237
 238 out:
 239         kfree(cmd);
 240         return ret;
 241 }
 242
 243 int wl1251_cmd_data_path_tx(struct wl1251 *wl, u8 channel, bool enable)
 244 {
 245         struct cmd_enabledisable_path *cmd;
 246         int ret;
 247         u16 cmd_tx;
 248
 249         wl1251_debug(DEBUG_CMD, "cmd data path");
 250
 251         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 252         if (!cmd)
 253                 return -ENOMEM;
 254
 255         cmd->channel = channel;
 256
 257         if (enable)
 258                 cmd_tx = CMD_ENABLE_TX;
 259         else
 260                 cmd_tx = CMD_DISABLE_TX;
 261
 262         ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
 263         if (ret < 0)
 264                 wl1251_error("tx %s cmd for channel %d failed",
 265                              enable ? "start" : "stop", channel);
 266         else
 267                 wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
 268                              enable ? "start" : "stop", channel);
 269
 270         kfree(cmd);
 271         return ret;
 272 }
 273
 274 int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 275                     u16 beacon_interval, u8 dtim_interval)
 276 {
 277         struct cmd_join *join;
 278         int ret, i;
 279         u8 *bssid;
 280
 281         join = kzalloc(sizeof(*join), GFP_KERNEL);
 282         if (!join) {
 283                 ret = -ENOMEM;
 284                 goto out;
 285         }
 286
 287         wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
 288                      bss_type == BSS_TYPE_IBSS ? " ibss" : "",
 289                      channel, beacon_interval, dtim_interval);
 290
 291         /* Reverse order BSSID */
 292         bssid = (u8 *) &join->bssid_lsb;
 293         for (i = 0; i < ETH_ALEN; i++)
 294                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 295
 296         join->rx_config_options = wl->rx_config;
 297         join->rx_filter_options = wl->rx_filter;
 298
 299         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 300                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 301
 302         join->beacon_interval = beacon_interval;
 303         join->dtim_interval = dtim_interval;
 304         join->bss_type = bss_type;
 305         join->channel = channel;
 306         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 307
 308         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 309         if (ret < 0) {
 310                 wl1251_error("failed to initiate cmd join");
 311                 goto out;
 312         }
 313
 314 out:
 315         kfree(join);
 316         return ret;
 317 }
 318
 319 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 320 {
 321         struct wl1251_cmd_ps_params *ps_params = NULL;
 322         int ret = 0;
 323
 324         wl1251_debug(DEBUG_CMD, "cmd set ps mode");
 325
 326         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 327         if (!ps_params) {
 328                 ret = -ENOMEM;
 329                 goto out;
 330         }
 331
 332         ps_params->ps_mode = ps_mode;
 333         ps_params->send_null_data = 1;
 334         ps_params->retries = 5;
 335         ps_params->hang_over_period = 128;
 336         ps_params->null_data_rate = 1; /* 1 Mbps */
 337
 338         ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 339                               sizeof(*ps_params));
 340         if (ret < 0) {
 341                 wl1251_error("cmd set_ps_mode failed");
 342                 goto out;
 343         }
 344
 345 out:
 346         kfree(ps_params);
 347         return ret;
 348 }
 349
 350 int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
 351                            size_t len)
 352 {
 353         struct cmd_read_write_memory *cmd;
 354         int ret = 0;
 355
 356         wl1251_debug(DEBUG_CMD, "cmd read memory");
 357
 358         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 359         if (!cmd) {
 360                 ret = -ENOMEM;
 361                 goto out;
 362         }
 363
 364         WARN_ON(len > MAX_READ_SIZE);
 365         len = min_t(size_t, len, MAX_READ_SIZE);
 366
 367         cmd->addr = addr;
 368         cmd->size = len;
 369
 370         ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 371         if (ret < 0) {
 372                 wl1251_error("read memory command failed: %d", ret);
 373                 goto out;
 374         }
 375
 376         /* the read command got in, we can now read the answer */
 377         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 378
 379         if (cmd->header.status != CMD_STATUS_SUCCESS)
 380                 wl1251_error("error in read command result: %d",
 381                              cmd->header.status);
 382
 383         memcpy(answer, cmd->value, len);
 384
 385 out:
 386         kfree(cmd);
 387         return ret;
 388 }
 389
 390 int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
 391                             void *buf, size_t buf_len)
 392 {
 393         struct wl1251_cmd_packet_template *cmd;
 394         size_t cmd_len;
 395         int ret = 0;
 396
 397         wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 398
 399         WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
 400         buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
 401         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 402
 403         cmd = kzalloc(cmd_len, GFP_KERNEL);
 404         if (!cmd) {
 405                 ret = -ENOMEM;
 406                 goto out;
 407         }
 408
 409         cmd->size = cpu_to_le16(buf_len);
 410
 411         if (buf)
 412                 memcpy(cmd->data, buf, buf_len);
 413
 414         ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
 415         if (ret < 0) {
 416                 wl1251_warning("cmd set_template failed: %d", ret);
 417                 goto out;
 418         }
 419
 420 out:
 421         kfree(cmd);
 422         return ret;
 423 }
 424
 425 int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
 426                     struct ieee80211_channel *channels[],
 427                     unsigned int n_channels, unsigned int n_probes)
 428 {
 429         struct wl1251_cmd_scan *cmd;
 430         int i, ret = 0;
 431
 432         wl1251_debug(DEBUG_CMD, "cmd scan channels %d", n_channels);
 433
 434         WARN_ON(n_channels > SCAN_MAX_NUM_OF_CHANNELS);
 435
 436         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 437         if (!cmd)
 438                 return -ENOMEM;
 439
 440         cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 441         cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
 442                                                     CFG_RX_MGMT_EN |
 443                                                     CFG_RX_BCN_EN);
 444         cmd->params.scan_options = 0;
 445         /*
 446          * Use high priority scan when not associated to prevent fw issue
 447          * causing never-ending scans (sometimes 20+ minutes).
 448          * Note: This bug may be caused by the fw's DTIM handling.
 449          */
 450         if (is_zero_ether_addr(wl->bssid))
 451                 cmd->params.scan_options |= cpu_to_le16(WL1251_SCAN_OPT_PRIORITY_HIGH);
 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         if (ssid) {
 470                 int len = clamp_val(ssid_len, 0, IEEE80211_MAX_SSID_LEN);
 471
 472                 cmd->params.ssid_len = len;
 473                 memcpy(cmd->params.ssid, ssid, len);
 474         }
 475
 476         ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
 477         if (ret < 0) {
 478                 wl1251_error("cmd scan failed: %d", ret);
 479                 goto out;
 480         }
 481
 482         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 483
 484         if (cmd->header.status != CMD_STATUS_SUCCESS) {
 485                 wl1251_error("cmd scan status wasn't success: %d",
 486                              cmd->header.status);
 487                 ret = -EIO;
 488                 goto out;
 489         }
 490
 491 out:
 492         kfree(cmd);
 493         return ret;
 494 }
 495
 496 int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
 497 {
 498         struct wl1251_cmd_trigger_scan_to *cmd;
 499         int ret;
 500
 501         wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
 502
 503         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 504         if (!cmd)
 505                 return -ENOMEM;
 506
 507         cmd->timeout = timeout;
 508
 509         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
 510         if (ret < 0) {
 511                 wl1251_error("cmd trigger scan to failed: %d", ret);
 512                 goto out;
 513         }
 514
 515 out:
 516         kfree(cmd);
 517         return ret;
 518 }