1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Device probe and register. 4 * 5 * Copyright (c) 2017-2020, Silicon Laboratories, Inc. 6 * Copyright (c) 2010, ST-Ericsson 7 * Copyright (c) 2008, Johannes Berg <johannes@sipsolutions.net> 8 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). 9 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de> 10 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net> 11 * Copyright (c) 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al. 12 */ 13 #include <linux/module.h> 14 #include <linux/of.h> 15 #include <linux/of_net.h> 16 #include <linux/gpio/consumer.h> 17 #include <linux/mmc/sdio_func.h> 18 #include <linux/spi/spi.h> 19 #include <linux/etherdevice.h> 20 #include <linux/firmware.h> 21 22 #include "main.h" 23 #include "wfx.h" 24 #include "fwio.h" 25 #include "hwio.h" 26 #include "bus.h" 27 #include "bh.h" 28 #include "sta.h" 29 #include "key.h" 30 #include "scan.h" 31 #include "debug.h" 32 #include "data_tx.h" 33 #include "hif_tx_mib.h" 34 #include "hif_api_cmd.h" 35 36 #define WFX_PDS_TLV_TYPE 0x4450 // "PD" (Platform Data) in ascii little-endian 37 #define WFX_PDS_MAX_CHUNK_SIZE 1500 38 39 MODULE_DESCRIPTION("Silicon Labs 802.11 Wireless LAN driver for WF200"); 40 MODULE_AUTHOR("Jérôme Pouiller <jerome.pouiller@silabs.com>"); 41 MODULE_LICENSE("GPL"); 42 43 #define RATETAB_ENT(_rate, _rateid, _flags) { \ 44 .bitrate = (_rate), \ 45 .hw_value = (_rateid), \ 46 .flags = (_flags), \ 47 } 48 49 static struct ieee80211_rate wfx_rates[] = { 50 RATETAB_ENT(10, 0, 0), 51 RATETAB_ENT(20, 1, IEEE80211_RATE_SHORT_PREAMBLE), 52 RATETAB_ENT(55, 2, IEEE80211_RATE_SHORT_PREAMBLE), 53 RATETAB_ENT(110, 3, IEEE80211_RATE_SHORT_PREAMBLE), 54 RATETAB_ENT(60, 6, 0), 55 RATETAB_ENT(90, 7, 0), 56 RATETAB_ENT(120, 8, 0), 57 RATETAB_ENT(180, 9, 0), 58 RATETAB_ENT(240, 10, 0), 59 RATETAB_ENT(360, 11, 0), 60 RATETAB_ENT(480, 12, 0), 61 RATETAB_ENT(540, 13, 0), 62 }; 63 64 #define CHAN2G(_channel, _freq, _flags) { \ 65 .band = NL80211_BAND_2GHZ, \ 66 .center_freq = (_freq), \ 67 .hw_value = (_channel), \ 68 .flags = (_flags), \ 69 .max_antenna_gain = 0, \ 70 .max_power = 30, \ 71 } 72 73 static struct ieee80211_channel wfx_2ghz_chantable[] = { 74 CHAN2G(1, 2412, 0), 75 CHAN2G(2, 2417, 0), 76 CHAN2G(3, 2422, 0), 77 CHAN2G(4, 2427, 0), 78 CHAN2G(5, 2432, 0), 79 CHAN2G(6, 2437, 0), 80 CHAN2G(7, 2442, 0), 81 CHAN2G(8, 2447, 0), 82 CHAN2G(9, 2452, 0), 83 CHAN2G(10, 2457, 0), 84 CHAN2G(11, 2462, 0), 85 CHAN2G(12, 2467, 0), 86 CHAN2G(13, 2472, 0), 87 CHAN2G(14, 2484, 0), 88 }; 89 90 static const struct ieee80211_supported_band wfx_band_2ghz = { 91 .channels = wfx_2ghz_chantable, 92 .n_channels = ARRAY_SIZE(wfx_2ghz_chantable), 93 .bitrates = wfx_rates, 94 .n_bitrates = ARRAY_SIZE(wfx_rates), 95 .ht_cap = { 96 /* Receive caps */ 97 .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 | 98 IEEE80211_HT_CAP_MAX_AMSDU | (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT), 99 .ht_supported = 1, 100 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K, 101 .ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE, 102 .mcs = { 103 .rx_mask = { 0xFF }, /* MCS0 to MCS7 */ 104 .rx_highest = cpu_to_le16(72), 105 .tx_params = IEEE80211_HT_MCS_TX_DEFINED, 106 }, 107 }, 108 }; 109 110 static const struct ieee80211_iface_limit wdev_iface_limits[] = { 111 { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) }, 112 { .max = 1, .types = BIT(NL80211_IFTYPE_AP) }, 113 }; 114 115 static const struct ieee80211_iface_combination wfx_iface_combinations[] = { 116 { 117 .num_different_channels = 2, 118 .max_interfaces = 2, 119 .limits = wdev_iface_limits, 120 .n_limits = ARRAY_SIZE(wdev_iface_limits), 121 } 122 }; 123 124 static const struct ieee80211_ops wfx_ops = { 125 .start = wfx_start, 126 .stop = wfx_stop, 127 .add_interface = wfx_add_interface, 128 .remove_interface = wfx_remove_interface, 129 .config = wfx_config, 130 .tx = wfx_tx, 131 .join_ibss = wfx_join_ibss, 132 .leave_ibss = wfx_leave_ibss, 133 .conf_tx = wfx_conf_tx, 134 .hw_scan = wfx_hw_scan, 135 .cancel_hw_scan = wfx_cancel_hw_scan, 136 .start_ap = wfx_start_ap, 137 .stop_ap = wfx_stop_ap, 138 .sta_add = wfx_sta_add, 139 .sta_remove = wfx_sta_remove, 140 .set_tim = wfx_set_tim, 141 .set_key = wfx_set_key, 142 .set_rts_threshold = wfx_set_rts_threshold, 143 .set_default_unicast_key = wfx_set_default_unicast_key, 144 .bss_info_changed = wfx_bss_info_changed, 145 .configure_filter = wfx_configure_filter, 146 .ampdu_action = wfx_ampdu_action, 147 .flush = wfx_flush, 148 .add_chanctx = wfx_add_chanctx, 149 .remove_chanctx = wfx_remove_chanctx, 150 .change_chanctx = wfx_change_chanctx, 151 .assign_vif_chanctx = wfx_assign_vif_chanctx, 152 .unassign_vif_chanctx = wfx_unassign_vif_chanctx, 153 }; 154 155 bool wfx_api_older_than(struct wfx_dev *wdev, int major, int minor) 156 { 157 if (wdev->hw_caps.api_version_major < major) 158 return true; 159 if (wdev->hw_caps.api_version_major > major) 160 return false; 161 if (wdev->hw_caps.api_version_minor < minor) 162 return true; 163 return false; 164 } 165 166 /* The device needs data about the antenna configuration. This information in provided by PDS 167 * (Platform Data Set, this is the wording used in WF200 documentation) files. For hardware 168 * integrators, the full process to create PDS files is described here: 169 * https://github.com/SiliconLabs/wfx-firmware/blob/master/PDS/README.md 170 * 171 * The PDS file is an array of Time-Length-Value structs. 172 */ 173 int wfx_send_pds(struct wfx_dev *wdev, u8 *buf, size_t len) 174 { 175 int ret, chunk_type, chunk_len, chunk_num = 0; 176 177 if (*buf == '{') { 178 dev_err(wdev->dev, "PDS: malformed file (legacy format?)\n"); 179 return -EINVAL; 180 } 181 while (len > 0) { 182 chunk_type = get_unaligned_le16(buf + 0); 183 chunk_len = get_unaligned_le16(buf + 2); 184 if (chunk_len > len) { 185 dev_err(wdev->dev, "PDS:%d: corrupted file\n", chunk_num); 186 return -EINVAL; 187 } 188 if (chunk_type != WFX_PDS_TLV_TYPE) { 189 dev_info(wdev->dev, "PDS:%d: skip unknown data\n", chunk_num); 190 goto next; 191 } 192 if (chunk_len > WFX_PDS_MAX_CHUNK_SIZE) 193 dev_warn(wdev->dev, "PDS:%d: unexpectedly large chunk\n", chunk_num); 194 if (buf[4] != '{' || buf[chunk_len - 1] != '}') 195 dev_warn(wdev->dev, "PDS:%d: unexpected content\n", chunk_num); 196 197 ret = wfx_hif_configuration(wdev, buf + 4, chunk_len - 4); 198 if (ret > 0) { 199 dev_err(wdev->dev, "PDS:%d: invalid data (unsupported options?)\n", chunk_num); 200 return -EINVAL; 201 } 202 if (ret == -ETIMEDOUT) { 203 dev_err(wdev->dev, "PDS:%d: chip didn't reply (corrupted file?)\n", chunk_num); 204 return ret; 205 } 206 if (ret) { 207 dev_err(wdev->dev, "PDS:%d: chip returned an unknown error\n", chunk_num); 208 return -EIO; 209 } 210 next: 211 chunk_num++; 212 len -= chunk_len; 213 buf += chunk_len; 214 } 215 return 0; 216 } 217 218 static int wfx_send_pdata_pds(struct wfx_dev *wdev) 219 { 220 int ret = 0; 221 const struct firmware *pds; 222 u8 *tmp_buf; 223 224 ret = request_firmware(&pds, wdev->pdata.file_pds, wdev->dev); 225 if (ret) { 226 dev_err(wdev->dev, "can't load antenna parameters (PDS file %s). The device may be unstable.\n", 227 wdev->pdata.file_pds); 228 return ret; 229 } 230 tmp_buf = kmemdup(pds->data, pds->size, GFP_KERNEL); 231 if (!tmp_buf) { 232 ret = -ENOMEM; 233 goto release_fw; 234 } 235 ret = wfx_send_pds(wdev, tmp_buf, pds->size); 236 kfree(tmp_buf); 237 release_fw: 238 release_firmware(pds); 239 return ret; 240 } 241 242 static void wfx_free_common(void *data) 243 { 244 struct wfx_dev *wdev = data; 245 246 mutex_destroy(&wdev->tx_power_loop_info_lock); 247 mutex_destroy(&wdev->rx_stats_lock); 248 mutex_destroy(&wdev->conf_mutex); 249 ieee80211_free_hw(wdev->hw); 250 } 251 252 struct wfx_dev *wfx_init_common(struct device *dev, const struct wfx_platform_data *pdata, 253 const struct wfx_hwbus_ops *hwbus_ops, void *hwbus_priv) 254 { 255 struct ieee80211_hw *hw; 256 struct wfx_dev *wdev; 257 258 hw = ieee80211_alloc_hw(sizeof(struct wfx_dev), &wfx_ops); 259 if (!hw) 260 return NULL; 261 262 SET_IEEE80211_DEV(hw, dev); 263 264 ieee80211_hw_set(hw, TX_AMPDU_SETUP_IN_HW); 265 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 266 ieee80211_hw_set(hw, CONNECTION_MONITOR); 267 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 268 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 269 ieee80211_hw_set(hw, SIGNAL_DBM); 270 ieee80211_hw_set(hw, SUPPORTS_PS); 271 ieee80211_hw_set(hw, MFP_CAPABLE); 272 273 hw->vif_data_size = sizeof(struct wfx_vif); 274 hw->sta_data_size = sizeof(struct wfx_sta_priv); 275 hw->queues = 4; 276 hw->max_rates = 8; 277 hw->max_rate_tries = 8; 278 hw->extra_tx_headroom = sizeof(struct wfx_hif_msg) + sizeof(struct wfx_hif_req_tx) + 279 4 /* alignment */ + 8 /* TKIP IV */; 280 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | 281 BIT(NL80211_IFTYPE_ADHOC) | 282 BIT(NL80211_IFTYPE_AP); 283 hw->wiphy->probe_resp_offload = NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS | 284 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 | 285 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P | 286 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U; 287 hw->wiphy->features |= NL80211_FEATURE_AP_SCAN; 288 hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD; 289 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD; 290 hw->wiphy->max_ap_assoc_sta = HIF_LINK_ID_MAX; 291 hw->wiphy->max_scan_ssids = 2; 292 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 293 hw->wiphy->n_iface_combinations = ARRAY_SIZE(wfx_iface_combinations); 294 hw->wiphy->iface_combinations = wfx_iface_combinations; 295 hw->wiphy->bands[NL80211_BAND_2GHZ] = devm_kmalloc(dev, sizeof(wfx_band_2ghz), GFP_KERNEL); 296 if (!hw->wiphy->bands[NL80211_BAND_2GHZ]) 297 goto err; 298 299 /* FIXME: also copy wfx_rates and wfx_2ghz_chantable */ 300 memcpy(hw->wiphy->bands[NL80211_BAND_2GHZ], &wfx_band_2ghz, sizeof(wfx_band_2ghz)); 301 302 wdev = hw->priv; 303 wdev->hw = hw; 304 wdev->dev = dev; 305 wdev->hwbus_ops = hwbus_ops; 306 wdev->hwbus_priv = hwbus_priv; 307 memcpy(&wdev->pdata, pdata, sizeof(*pdata)); 308 of_property_read_string(dev->of_node, "silabs,antenna-config-file", &wdev->pdata.file_pds); 309 wdev->pdata.gpio_wakeup = devm_gpiod_get_optional(dev, "wakeup", GPIOD_OUT_LOW); 310 if (IS_ERR(wdev->pdata.gpio_wakeup)) 311 goto err; 312 313 if (wdev->pdata.gpio_wakeup) 314 gpiod_set_consumer_name(wdev->pdata.gpio_wakeup, "wfx wakeup"); 315 316 mutex_init(&wdev->conf_mutex); 317 mutex_init(&wdev->rx_stats_lock); 318 mutex_init(&wdev->tx_power_loop_info_lock); 319 init_completion(&wdev->firmware_ready); 320 INIT_DELAYED_WORK(&wdev->cooling_timeout_work, wfx_cooling_timeout_work); 321 skb_queue_head_init(&wdev->tx_pending); 322 init_waitqueue_head(&wdev->tx_dequeue); 323 wfx_init_hif_cmd(&wdev->hif_cmd); 324 325 if (devm_add_action_or_reset(dev, wfx_free_common, wdev)) 326 return NULL; 327 328 return wdev; 329 330 err: 331 ieee80211_free_hw(hw); 332 return NULL; 333 } 334 335 int wfx_probe(struct wfx_dev *wdev) 336 { 337 int i; 338 int err; 339 struct gpio_desc *gpio_saved; 340 341 /* During first part of boot, gpio_wakeup cannot yet been used. So prevent bh() to touch 342 * it. 343 */ 344 gpio_saved = wdev->pdata.gpio_wakeup; 345 wdev->pdata.gpio_wakeup = NULL; 346 wdev->poll_irq = true; 347 348 wdev->bh_wq = alloc_workqueue("wfx_bh_wq", WQ_HIGHPRI, 0); 349 if (!wdev->bh_wq) 350 return -ENOMEM; 351 352 wfx_bh_register(wdev); 353 354 err = wfx_init_device(wdev); 355 if (err) 356 goto bh_unregister; 357 358 wfx_bh_poll_irq(wdev); 359 err = wait_for_completion_timeout(&wdev->firmware_ready, 1 * HZ); 360 if (err <= 0) { 361 if (err == 0) { 362 dev_err(wdev->dev, "timeout while waiting for startup indication\n"); 363 err = -ETIMEDOUT; 364 } else if (err == -ERESTARTSYS) { 365 dev_info(wdev->dev, "probe interrupted by user\n"); 366 } 367 goto bh_unregister; 368 } 369 370 /* FIXME: fill wiphy::hw_version */ 371 dev_info(wdev->dev, "started firmware %d.%d.%d \"%s\" (API: %d.%d, keyset: %02X, caps: 0x%.8X)\n", 372 wdev->hw_caps.firmware_major, wdev->hw_caps.firmware_minor, 373 wdev->hw_caps.firmware_build, wdev->hw_caps.firmware_label, 374 wdev->hw_caps.api_version_major, wdev->hw_caps.api_version_minor, 375 wdev->keyset, wdev->hw_caps.link_mode); 376 snprintf(wdev->hw->wiphy->fw_version, 377 sizeof(wdev->hw->wiphy->fw_version), 378 "%d.%d.%d", 379 wdev->hw_caps.firmware_major, 380 wdev->hw_caps.firmware_minor, 381 wdev->hw_caps.firmware_build); 382 383 if (wfx_api_older_than(wdev, 1, 0)) { 384 dev_err(wdev->dev, "unsupported firmware API version (expect 1 while firmware returns %d)\n", 385 wdev->hw_caps.api_version_major); 386 err = -EOPNOTSUPP; 387 goto bh_unregister; 388 } 389 390 if (wdev->hw_caps.link_mode == SEC_LINK_ENFORCED) { 391 dev_err(wdev->dev, "chip require secure_link, but can't negotiate it\n"); 392 goto bh_unregister; 393 } 394 395 if (wdev->hw_caps.region_sel_mode) { 396 wdev->hw->wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS; 397 wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[11].flags |= 398 IEEE80211_CHAN_NO_IR; 399 wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[12].flags |= 400 IEEE80211_CHAN_NO_IR; 401 wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[13].flags |= 402 IEEE80211_CHAN_DISABLED; 403 } 404 405 dev_dbg(wdev->dev, "sending configuration file %s\n", wdev->pdata.file_pds); 406 err = wfx_send_pdata_pds(wdev); 407 if (err < 0 && err != -ENOENT) 408 goto bh_unregister; 409 410 wdev->poll_irq = false; 411 err = wdev->hwbus_ops->irq_subscribe(wdev->hwbus_priv); 412 if (err) 413 goto bh_unregister; 414 415 err = wfx_hif_use_multi_tx_conf(wdev, true); 416 if (err) 417 dev_err(wdev->dev, "misconfigured IRQ?\n"); 418 419 wdev->pdata.gpio_wakeup = gpio_saved; 420 if (wdev->pdata.gpio_wakeup) { 421 dev_dbg(wdev->dev, "enable 'quiescent' power mode with wakeup GPIO and PDS file %s\n", 422 wdev->pdata.file_pds); 423 gpiod_set_value_cansleep(wdev->pdata.gpio_wakeup, 1); 424 wfx_control_reg_write(wdev, 0); 425 wfx_hif_set_operational_mode(wdev, HIF_OP_POWER_MODE_QUIESCENT); 426 } else { 427 wfx_hif_set_operational_mode(wdev, HIF_OP_POWER_MODE_DOZE); 428 } 429 430 for (i = 0; i < ARRAY_SIZE(wdev->addresses); i++) { 431 eth_zero_addr(wdev->addresses[i].addr); 432 err = of_get_mac_address(wdev->dev->of_node, wdev->addresses[i].addr); 433 if (!err) 434 wdev->addresses[i].addr[ETH_ALEN - 1] += i; 435 else 436 ether_addr_copy(wdev->addresses[i].addr, wdev->hw_caps.mac_addr[i]); 437 if (!is_valid_ether_addr(wdev->addresses[i].addr)) { 438 dev_warn(wdev->dev, "using random MAC address\n"); 439 eth_random_addr(wdev->addresses[i].addr); 440 } 441 dev_info(wdev->dev, "MAC address %d: %pM\n", i, wdev->addresses[i].addr); 442 } 443 wdev->hw->wiphy->n_addresses = ARRAY_SIZE(wdev->addresses); 444 wdev->hw->wiphy->addresses = wdev->addresses; 445 446 if (!wfx_api_older_than(wdev, 3, 8)) 447 wdev->hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS; 448 449 err = ieee80211_register_hw(wdev->hw); 450 if (err) 451 goto irq_unsubscribe; 452 453 err = wfx_debug_init(wdev); 454 if (err) 455 goto ieee80211_unregister; 456 457 return 0; 458 459 ieee80211_unregister: 460 ieee80211_unregister_hw(wdev->hw); 461 irq_unsubscribe: 462 wdev->hwbus_ops->irq_unsubscribe(wdev->hwbus_priv); 463 bh_unregister: 464 wfx_bh_unregister(wdev); 465 destroy_workqueue(wdev->bh_wq); 466 return err; 467 } 468 469 void wfx_release(struct wfx_dev *wdev) 470 { 471 ieee80211_unregister_hw(wdev->hw); 472 wfx_hif_shutdown(wdev); 473 wdev->hwbus_ops->irq_unsubscribe(wdev->hwbus_priv); 474 wfx_bh_unregister(wdev); 475 destroy_workqueue(wdev->bh_wq); 476 } 477 478 static int __init wfx_core_init(void) 479 { 480 int ret = 0; 481 482 if (IS_ENABLED(CONFIG_SPI)) 483 ret = spi_register_driver(&wfx_spi_driver); 484 if (IS_ENABLED(CONFIG_MMC) && !ret) 485 ret = sdio_register_driver(&wfx_sdio_driver); 486 return ret; 487 } 488 module_init(wfx_core_init); 489 490 static void __exit wfx_core_exit(void) 491 { 492 if (IS_ENABLED(CONFIG_MMC)) 493 sdio_unregister_driver(&wfx_sdio_driver); 494 if (IS_ENABLED(CONFIG_SPI)) 495 spi_unregister_driver(&wfx_spi_driver); 496 } 497 module_exit(wfx_core_exit); 498