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  * wl1251_cmd_send - 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  * wl1251_cmd_test - Send test command to firmware
  63  *
  64  * @wl: wl struct
  65  * @buf: buffer containing the command, with all headers, must work with dma
  66  * @buf_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  * wl1251_cmd_interrogate - 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  * wl1251_cmd_configure - 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                 return -ENOMEM;
 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 ret;
 203 }
 204
 205 int wl1251_cmd_data_path_rx(struct wl1251 *wl, u8 channel, bool enable)
 206 {
 207         struct cmd_enabledisable_path *cmd;
 208         int ret;
 209         u16 cmd_rx;
 210
 211         wl1251_debug(DEBUG_CMD, "cmd data path");
 212
 213         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 214         if (!cmd)
 215                 return -ENOMEM;
 216
 217         cmd->channel = channel;
 218
 219         if (enable)
 220                 cmd_rx = CMD_ENABLE_RX;
 221         else
 222                 cmd_rx = CMD_DISABLE_RX;
 223
 224         ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
 225         if (ret < 0) {
 226                 wl1251_error("rx %s cmd for channel %d failed",
 227                              enable ? "start" : "stop", channel);
 228                 goto out;
 229         }
 230
 231         wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
 232                      enable ? "start" : "stop", channel);
 233
 234 out:
 235         kfree(cmd);
 236         return ret;
 237 }
 238
 239 int wl1251_cmd_data_path_tx(struct wl1251 *wl, u8 channel, bool enable)
 240 {
 241         struct cmd_enabledisable_path *cmd;
 242         int ret;
 243         u16 cmd_tx;
 244
 245         wl1251_debug(DEBUG_CMD, "cmd data path");
 246
 247         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 248         if (!cmd)
 249                 return -ENOMEM;
 250
 251         cmd->channel = channel;
 252
 253         if (enable)
 254                 cmd_tx = CMD_ENABLE_TX;
 255         else
 256                 cmd_tx = CMD_DISABLE_TX;
 257
 258         ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
 259         if (ret < 0)
 260                 wl1251_error("tx %s cmd for channel %d failed",
 261                              enable ? "start" : "stop", channel);
 262         else
 263                 wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
 264                              enable ? "start" : "stop", channel);
 265
 266         kfree(cmd);
 267         return ret;
 268 }
 269
 270 int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 271                     u16 beacon_interval, u8 dtim_interval)
 272 {
 273         struct cmd_join *join;
 274         int ret, i;
 275         u8 *bssid;
 276
 277         join = kzalloc(sizeof(*join), GFP_KERNEL);
 278         if (!join)
 279                 return -ENOMEM;
 280
 281         wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
 282                      bss_type == BSS_TYPE_IBSS ? " ibss" : "",
 283                      channel, beacon_interval, dtim_interval);
 284
 285         /* Reverse order BSSID */
 286         bssid = (u8 *) &join->bssid_lsb;
 287         for (i = 0; i < ETH_ALEN; i++)
 288                 bssid[i] = wl->bssid[ETH_ALEN - i - 1];
 289
 290         join->rx_config_options = wl->rx_config;
 291         join->rx_filter_options = wl->rx_filter;
 292
 293         join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
 294                 RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
 295
 296         join->beacon_interval = beacon_interval;
 297         join->dtim_interval = dtim_interval;
 298         join->bss_type = bss_type;
 299         join->channel = channel;
 300         join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;
 301
 302         ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
 303         if (ret < 0) {
 304                 wl1251_error("failed to initiate cmd join");
 305                 goto out;
 306         }
 307
 308 out:
 309         kfree(join);
 310         return ret;
 311 }
 312
 313 int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
 314 {
 315         struct wl1251_cmd_ps_params *ps_params = NULL;
 316         int ret = 0;
 317
 318         wl1251_debug(DEBUG_CMD, "cmd set ps mode");
 319
 320         ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
 321         if (!ps_params)
 322                 return -ENOMEM;
 323
 324         ps_params->ps_mode = ps_mode;
 325         ps_params->send_null_data = 1;
 326         ps_params->retries = 5;
 327         ps_params->hang_over_period = 128;
 328         ps_params->null_data_rate = 1; /* 1 Mbps */
 329
 330         ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
 331                               sizeof(*ps_params));
 332         if (ret < 0) {
 333                 wl1251_error("cmd set_ps_mode failed");
 334                 goto out;
 335         }
 336
 337 out:
 338         kfree(ps_params);
 339         return ret;
 340 }
 341
 342 int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
 343                            size_t len)
 344 {
 345         struct cmd_read_write_memory *cmd;
 346         int ret = 0;
 347
 348         wl1251_debug(DEBUG_CMD, "cmd read memory");
 349
 350         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 351         if (!cmd)
 352                 return -ENOMEM;
 353
 354         WARN_ON(len > MAX_READ_SIZE);
 355         len = min_t(size_t, len, MAX_READ_SIZE);
 356
 357         cmd->addr = addr;
 358         cmd->size = len;
 359
 360         ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
 361         if (ret < 0) {
 362                 wl1251_error("read memory command failed: %d", ret);
 363                 goto out;
 364         }
 365
 366         /* the read command got in, we can now read the answer */
 367         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 368
 369         if (cmd->header.status != CMD_STATUS_SUCCESS)
 370                 wl1251_error("error in read command result: %d",
 371                              cmd->header.status);
 372
 373         memcpy(answer, cmd->value, len);
 374
 375 out:
 376         kfree(cmd);
 377         return ret;
 378 }
 379
 380 int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
 381                             void *buf, size_t buf_len)
 382 {
 383         struct wl1251_cmd_packet_template *cmd;
 384         size_t cmd_len;
 385         int ret = 0;
 386
 387         wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);
 388
 389         WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
 390         buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
 391         cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);
 392
 393         cmd = kzalloc(cmd_len, GFP_KERNEL);
 394         if (!cmd)
 395                 return -ENOMEM;
 396
 397         cmd->size = cpu_to_le16(buf_len);
 398
 399         if (buf)
 400                 memcpy(cmd->data, buf, buf_len);
 401
 402         ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
 403         if (ret < 0) {
 404                 wl1251_warning("cmd set_template failed: %d", ret);
 405                 goto out;
 406         }
 407
 408 out:
 409         kfree(cmd);
 410         return ret;
 411 }
 412
 413 int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
 414                     struct ieee80211_channel *channels[],
 415                     unsigned int n_channels, unsigned int n_probes)
 416 {
 417         struct wl1251_cmd_scan *cmd;
 418         int i, ret = 0;
 419
 420         wl1251_debug(DEBUG_CMD, "cmd scan channels %d", n_channels);
 421
 422         WARN_ON(n_channels > SCAN_MAX_NUM_OF_CHANNELS);
 423
 424         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 425         if (!cmd)
 426                 return -ENOMEM;
 427
 428         cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
 429         cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
 430                                                     CFG_RX_MGMT_EN |
 431                                                     CFG_RX_BCN_EN);
 432         cmd->params.scan_options = 0;
 433         /*
 434          * Use high priority scan when not associated to prevent fw issue
 435          * causing never-ending scans (sometimes 20+ minutes).
 436          * Note: This bug may be caused by the fw's DTIM handling.
 437          */
 438         if (is_zero_ether_addr(wl->bssid))
 439                 cmd->params.scan_options |= cpu_to_le16(WL1251_SCAN_OPT_PRIORITY_HIGH);
 440         cmd->params.num_channels = n_channels;
 441         cmd->params.num_probe_requests = n_probes;
 442         cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
 443         cmd->params.tid_trigger = 0;
 444
 445         for (i = 0; i < n_channels; i++) {
 446                 cmd->channels[i].min_duration =
 447                         cpu_to_le32(WL1251_SCAN_MIN_DURATION);
 448                 cmd->channels[i].max_duration =
 449                         cpu_to_le32(WL1251_SCAN_MAX_DURATION);
 450                 memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
 451                 memset(&cmd->channels[i].bssid_msb, 0xff, 2);
 452                 cmd->channels[i].early_termination = 0;
 453                 cmd->channels[i].tx_power_att = 0;
 454                 cmd->channels[i].channel = channels[i]->hw_value;
 455         }
 456
 457         if (ssid) {
 458                 int len = clamp_val(ssid_len, 0, IEEE80211_MAX_SSID_LEN);
 459
 460                 cmd->params.ssid_len = len;
 461                 memcpy(cmd->params.ssid, ssid, len);
 462         }
 463
 464         ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
 465         if (ret < 0) {
 466                 wl1251_error("cmd scan failed: %d", ret);
 467                 goto out;
 468         }
 469
 470         wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));
 471
 472         if (cmd->header.status != CMD_STATUS_SUCCESS) {
 473                 wl1251_error("cmd scan status wasn't success: %d",
 474                              cmd->header.status);
 475                 ret = -EIO;
 476                 goto out;
 477         }
 478
 479 out:
 480         kfree(cmd);
 481         return ret;
 482 }
 483
 484 int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
 485 {
 486         struct wl1251_cmd_trigger_scan_to *cmd;
 487         int ret;
 488
 489         wl1251_debug(DEBUG_CMD, "cmd trigger scan to");
 490
 491         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 492         if (!cmd)
 493                 return -ENOMEM;
 494
 495         cmd->timeout = timeout;
 496
 497         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
 498         if (ret < 0) {
 499                 wl1251_error("cmd trigger scan to failed: %d", ret);
 500                 goto out;
 501         }
 502
 503 out:
 504         kfree(cmd);
 505         return ret;
 506 }