// SPDX-License-Identifier: GPL-2.0-only /* * Device probe and register. * * Copyright (c) 2017-2020, Silicon Laboratories, Inc. * Copyright (c) 2010, ST-Ericsson * Copyright (c) 2008, Johannes Berg * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). * Copyright (c) 2007-2009, Christian Lamparter * Copyright (c) 2006, Michael Wu * Copyright (c) 2004-2006 Jean-Baptiste Note , et al. */ #include #include #include #include #include #include #include #include #include "main.h" #include "wfx.h" #include "fwio.h" #include "hwio.h" #include "bus.h" #include "bh.h" #include "sta.h" #include "key.h" #include "scan.h" #include "debug.h" #include "data_tx.h" #include "hif_tx_mib.h" #include "hif_api_cmd.h" #define WFX_PDS_TLV_TYPE 0x4450 // "PD" (Platform Data) in ascii little-endian #define WFX_PDS_MAX_CHUNK_SIZE 1500 MODULE_DESCRIPTION("Silicon Labs 802.11 Wireless LAN driver for WF200"); MODULE_AUTHOR("Jérôme Pouiller "); MODULE_LICENSE("GPL"); #define RATETAB_ENT(_rate, _rateid, _flags) { \ .bitrate = (_rate), \ .hw_value = (_rateid), \ .flags = (_flags), \ } static struct ieee80211_rate wfx_rates[] = { RATETAB_ENT(10, 0, 0), RATETAB_ENT(20, 1, IEEE80211_RATE_SHORT_PREAMBLE), RATETAB_ENT(55, 2, IEEE80211_RATE_SHORT_PREAMBLE), RATETAB_ENT(110, 3, IEEE80211_RATE_SHORT_PREAMBLE), RATETAB_ENT(60, 6, 0), RATETAB_ENT(90, 7, 0), RATETAB_ENT(120, 8, 0), RATETAB_ENT(180, 9, 0), RATETAB_ENT(240, 10, 0), RATETAB_ENT(360, 11, 0), RATETAB_ENT(480, 12, 0), RATETAB_ENT(540, 13, 0), }; #define CHAN2G(_channel, _freq, _flags) { \ .band = NL80211_BAND_2GHZ, \ .center_freq = (_freq), \ .hw_value = (_channel), \ .flags = (_flags), \ .max_antenna_gain = 0, \ .max_power = 30, \ } static struct ieee80211_channel wfx_2ghz_chantable[] = { CHAN2G(1, 2412, 0), CHAN2G(2, 2417, 0), CHAN2G(3, 2422, 0), CHAN2G(4, 2427, 0), CHAN2G(5, 2432, 0), CHAN2G(6, 2437, 0), CHAN2G(7, 2442, 0), CHAN2G(8, 2447, 0), CHAN2G(9, 2452, 0), CHAN2G(10, 2457, 0), CHAN2G(11, 2462, 0), CHAN2G(12, 2467, 0), CHAN2G(13, 2472, 0), CHAN2G(14, 2484, 0), }; static const struct ieee80211_supported_band wfx_band_2ghz = { .channels = wfx_2ghz_chantable, .n_channels = ARRAY_SIZE(wfx_2ghz_chantable), .bitrates = wfx_rates, .n_bitrates = ARRAY_SIZE(wfx_rates), .ht_cap = { /* Receive caps */ .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_MAX_AMSDU | (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT), .ht_supported = 1, .ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K, .ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE, .mcs = { .rx_mask = { 0xFF }, /* MCS0 to MCS7 */ .rx_highest = cpu_to_le16(72), .tx_params = IEEE80211_HT_MCS_TX_DEFINED, }, }, }; static const struct ieee80211_iface_limit wdev_iface_limits[] = { { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) }, { .max = 1, .types = BIT(NL80211_IFTYPE_AP) }, }; static const struct ieee80211_iface_combination wfx_iface_combinations[] = { { .num_different_channels = 2, .max_interfaces = 2, .limits = wdev_iface_limits, .n_limits = ARRAY_SIZE(wdev_iface_limits), } }; static const struct ieee80211_ops wfx_ops = { .start = wfx_start, .stop = wfx_stop, .add_interface = wfx_add_interface, .remove_interface = wfx_remove_interface, .config = wfx_config, .tx = wfx_tx, .wake_tx_queue = ieee80211_handle_wake_tx_queue, .join_ibss = wfx_join_ibss, .leave_ibss = wfx_leave_ibss, .conf_tx = wfx_conf_tx, .hw_scan = wfx_hw_scan, .cancel_hw_scan = wfx_cancel_hw_scan, .start_ap = wfx_start_ap, .stop_ap = wfx_stop_ap, .sta_add = wfx_sta_add, .sta_remove = wfx_sta_remove, .set_tim = wfx_set_tim, .set_key = wfx_set_key, .set_rts_threshold = wfx_set_rts_threshold, .set_default_unicast_key = wfx_set_default_unicast_key, .bss_info_changed = wfx_bss_info_changed, .configure_filter = wfx_configure_filter, .ampdu_action = wfx_ampdu_action, .flush = wfx_flush, .add_chanctx = wfx_add_chanctx, .remove_chanctx = wfx_remove_chanctx, .change_chanctx = wfx_change_chanctx, .assign_vif_chanctx = wfx_assign_vif_chanctx, .unassign_vif_chanctx = wfx_unassign_vif_chanctx, }; bool wfx_api_older_than(struct wfx_dev *wdev, int major, int minor) { if (wdev->hw_caps.api_version_major < major) return true; if (wdev->hw_caps.api_version_major > major) return false; if (wdev->hw_caps.api_version_minor < minor) return true; return false; } /* The device needs data about the antenna configuration. This information in provided by PDS * (Platform Data Set, this is the wording used in WF200 documentation) files. For hardware * integrators, the full process to create PDS files is described here: * https://github.com/SiliconLabs/wfx-firmware/blob/master/PDS/README.md * * The PDS file is an array of Time-Length-Value structs. */ int wfx_send_pds(struct wfx_dev *wdev, u8 *buf, size_t len) { int ret, chunk_type, chunk_len, chunk_num = 0; if (*buf == '{') { dev_err(wdev->dev, "PDS: malformed file (legacy format?)\n"); return -EINVAL; } while (len > 0) { chunk_type = get_unaligned_le16(buf + 0); chunk_len = get_unaligned_le16(buf + 2); if (chunk_len < 4 || chunk_len > len) { dev_err(wdev->dev, "PDS:%d: corrupted file\n", chunk_num); return -EINVAL; } if (chunk_type != WFX_PDS_TLV_TYPE) { dev_info(wdev->dev, "PDS:%d: skip unknown data\n", chunk_num); goto next; } if (chunk_len > WFX_PDS_MAX_CHUNK_SIZE) dev_warn(wdev->dev, "PDS:%d: unexpectedly large chunk\n", chunk_num); if (buf[4] != '{' || buf[chunk_len - 1] != '}') dev_warn(wdev->dev, "PDS:%d: unexpected content\n", chunk_num); ret = wfx_hif_configuration(wdev, buf + 4, chunk_len - 4); if (ret > 0) { dev_err(wdev->dev, "PDS:%d: invalid data (unsupported options?)\n", chunk_num); return -EINVAL; } if (ret == -ETIMEDOUT) { dev_err(wdev->dev, "PDS:%d: chip didn't reply (corrupted file?)\n", chunk_num); return ret; } if (ret) { dev_err(wdev->dev, "PDS:%d: chip returned an unknown error\n", chunk_num); return -EIO; } next: chunk_num++; len -= chunk_len; buf += chunk_len; } return 0; } static int wfx_send_pdata_pds(struct wfx_dev *wdev) { int ret = 0; const struct firmware *pds; u8 *tmp_buf; ret = request_firmware(&pds, wdev->pdata.file_pds, wdev->dev); if (ret) { dev_err(wdev->dev, "can't load antenna parameters (PDS file %s). The device may be unstable.\n", wdev->pdata.file_pds); return ret; } tmp_buf = kmemdup(pds->data, pds->size, GFP_KERNEL); if (!tmp_buf) { ret = -ENOMEM; goto release_fw; } ret = wfx_send_pds(wdev, tmp_buf, pds->size); kfree(tmp_buf); release_fw: release_firmware(pds); return ret; } static void wfx_free_common(void *data) { struct wfx_dev *wdev = data; mutex_destroy(&wdev->tx_power_loop_info_lock); mutex_destroy(&wdev->rx_stats_lock); mutex_destroy(&wdev->conf_mutex); ieee80211_free_hw(wdev->hw); } struct wfx_dev *wfx_init_common(struct device *dev, const struct wfx_platform_data *pdata, const struct wfx_hwbus_ops *hwbus_ops, void *hwbus_priv) { struct ieee80211_hw *hw; struct wfx_dev *wdev; hw = ieee80211_alloc_hw(sizeof(struct wfx_dev), &wfx_ops); if (!hw) return NULL; SET_IEEE80211_DEV(hw, dev); ieee80211_hw_set(hw, TX_AMPDU_SETUP_IN_HW); ieee80211_hw_set(hw, AMPDU_AGGREGATION); ieee80211_hw_set(hw, CONNECTION_MONITOR); ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); ieee80211_hw_set(hw, SIGNAL_DBM); ieee80211_hw_set(hw, SUPPORTS_PS); ieee80211_hw_set(hw, MFP_CAPABLE); hw->vif_data_size = sizeof(struct wfx_vif); hw->sta_data_size = sizeof(struct wfx_sta_priv); hw->queues = 4; hw->max_rates = 8; hw->max_rate_tries = 8; hw->extra_tx_headroom = sizeof(struct wfx_hif_msg) + sizeof(struct wfx_hif_req_tx) + 4 /* alignment */ + 8 /* TKIP IV */; hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP); hw->wiphy->probe_resp_offload = NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS | NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 | NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P | NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U; hw->wiphy->features |= NL80211_FEATURE_AP_SCAN; hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD; hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD; hw->wiphy->max_ap_assoc_sta = HIF_LINK_ID_MAX; hw->wiphy->max_scan_ssids = 2; hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; hw->wiphy->n_iface_combinations = ARRAY_SIZE(wfx_iface_combinations); hw->wiphy->iface_combinations = wfx_iface_combinations; hw->wiphy->bands[NL80211_BAND_2GHZ] = devm_kmalloc(dev, sizeof(wfx_band_2ghz), GFP_KERNEL); if (!hw->wiphy->bands[NL80211_BAND_2GHZ]) goto err; /* FIXME: also copy wfx_rates and wfx_2ghz_chantable */ memcpy(hw->wiphy->bands[NL80211_BAND_2GHZ], &wfx_band_2ghz, sizeof(wfx_band_2ghz)); wdev = hw->priv; wdev->hw = hw; wdev->dev = dev; wdev->hwbus_ops = hwbus_ops; wdev->hwbus_priv = hwbus_priv; memcpy(&wdev->pdata, pdata, sizeof(*pdata)); of_property_read_string(dev->of_node, "silabs,antenna-config-file", &wdev->pdata.file_pds); wdev->pdata.gpio_wakeup = devm_gpiod_get_optional(dev, "wakeup", GPIOD_OUT_LOW); if (IS_ERR(wdev->pdata.gpio_wakeup)) goto err; if (wdev->pdata.gpio_wakeup) gpiod_set_consumer_name(wdev->pdata.gpio_wakeup, "wfx wakeup"); mutex_init(&wdev->conf_mutex); mutex_init(&wdev->rx_stats_lock); mutex_init(&wdev->tx_power_loop_info_lock); init_completion(&wdev->firmware_ready); INIT_DELAYED_WORK(&wdev->cooling_timeout_work, wfx_cooling_timeout_work); skb_queue_head_init(&wdev->tx_pending); init_waitqueue_head(&wdev->tx_dequeue); wfx_init_hif_cmd(&wdev->hif_cmd); if (devm_add_action_or_reset(dev, wfx_free_common, wdev)) return NULL; return wdev; err: ieee80211_free_hw(hw); return NULL; } int wfx_probe(struct wfx_dev *wdev) { int i; int err; struct gpio_desc *gpio_saved; /* During first part of boot, gpio_wakeup cannot yet been used. So prevent bh() to touch * it. */ gpio_saved = wdev->pdata.gpio_wakeup; wdev->pdata.gpio_wakeup = NULL; wdev->poll_irq = true; wdev->bh_wq = alloc_workqueue("wfx_bh_wq", WQ_HIGHPRI, 0); if (!wdev->bh_wq) return -ENOMEM; wfx_bh_register(wdev); err = wfx_init_device(wdev); if (err) goto bh_unregister; wfx_bh_poll_irq(wdev); err = wait_for_completion_timeout(&wdev->firmware_ready, 1 * HZ); if (err <= 0) { if (err == 0) { dev_err(wdev->dev, "timeout while waiting for startup indication\n"); err = -ETIMEDOUT; } else if (err == -ERESTARTSYS) { dev_info(wdev->dev, "probe interrupted by user\n"); } goto bh_unregister; } /* FIXME: fill wiphy::hw_version */ dev_info(wdev->dev, "started firmware %d.%d.%d \"%s\" (API: %d.%d, keyset: %02X, caps: 0x%.8X)\n", wdev->hw_caps.firmware_major, wdev->hw_caps.firmware_minor, wdev->hw_caps.firmware_build, wdev->hw_caps.firmware_label, wdev->hw_caps.api_version_major, wdev->hw_caps.api_version_minor, wdev->keyset, wdev->hw_caps.link_mode); snprintf(wdev->hw->wiphy->fw_version, sizeof(wdev->hw->wiphy->fw_version), "%d.%d.%d", wdev->hw_caps.firmware_major, wdev->hw_caps.firmware_minor, wdev->hw_caps.firmware_build); if (wfx_api_older_than(wdev, 1, 0)) { dev_err(wdev->dev, "unsupported firmware API version (expect 1 while firmware returns %d)\n", wdev->hw_caps.api_version_major); err = -EOPNOTSUPP; goto bh_unregister; } if (wdev->hw_caps.link_mode == SEC_LINK_ENFORCED) { dev_err(wdev->dev, "chip require secure_link, but can't negotiate it\n"); goto bh_unregister; } if (wdev->hw_caps.region_sel_mode) { wdev->hw->wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS; wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[11].flags |= IEEE80211_CHAN_NO_IR; wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[12].flags |= IEEE80211_CHAN_NO_IR; wdev->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[13].flags |= IEEE80211_CHAN_DISABLED; } dev_dbg(wdev->dev, "sending configuration file %s\n", wdev->pdata.file_pds); err = wfx_send_pdata_pds(wdev); if (err < 0 && err != -ENOENT) goto bh_unregister; wdev->poll_irq = false; err = wdev->hwbus_ops->irq_subscribe(wdev->hwbus_priv); if (err) goto bh_unregister; err = wfx_hif_use_multi_tx_conf(wdev, true); if (err) dev_err(wdev->dev, "misconfigured IRQ?\n"); wdev->pdata.gpio_wakeup = gpio_saved; if (wdev->pdata.gpio_wakeup) { dev_dbg(wdev->dev, "enable 'quiescent' power mode with wakeup GPIO and PDS file %s\n", wdev->pdata.file_pds); gpiod_set_value_cansleep(wdev->pdata.gpio_wakeup, 1); wfx_control_reg_write(wdev, 0); wfx_hif_set_operational_mode(wdev, HIF_OP_POWER_MODE_QUIESCENT); } else { wfx_hif_set_operational_mode(wdev, HIF_OP_POWER_MODE_DOZE); } for (i = 0; i < ARRAY_SIZE(wdev->addresses); i++) { eth_zero_addr(wdev->addresses[i].addr); err = of_get_mac_address(wdev->dev->of_node, wdev->addresses[i].addr); if (!err) wdev->addresses[i].addr[ETH_ALEN - 1] += i; else ether_addr_copy(wdev->addresses[i].addr, wdev->hw_caps.mac_addr[i]); if (!is_valid_ether_addr(wdev->addresses[i].addr)) { dev_warn(wdev->dev, "using random MAC address\n"); eth_random_addr(wdev->addresses[i].addr); } dev_info(wdev->dev, "MAC address %d: %pM\n", i, wdev->addresses[i].addr); } wdev->hw->wiphy->n_addresses = ARRAY_SIZE(wdev->addresses); wdev->hw->wiphy->addresses = wdev->addresses; if (!wfx_api_older_than(wdev, 3, 8)) wdev->hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS; err = ieee80211_register_hw(wdev->hw); if (err) goto irq_unsubscribe; err = wfx_debug_init(wdev); if (err) goto ieee80211_unregister; return 0; ieee80211_unregister: ieee80211_unregister_hw(wdev->hw); irq_unsubscribe: wdev->hwbus_ops->irq_unsubscribe(wdev->hwbus_priv); bh_unregister: wfx_bh_unregister(wdev); destroy_workqueue(wdev->bh_wq); return err; } void wfx_release(struct wfx_dev *wdev) { ieee80211_unregister_hw(wdev->hw); wfx_hif_shutdown(wdev); wdev->hwbus_ops->irq_unsubscribe(wdev->hwbus_priv); wfx_bh_unregister(wdev); destroy_workqueue(wdev->bh_wq); } static int __init wfx_core_init(void) { int ret = 0; if (IS_ENABLED(CONFIG_SPI)) ret = spi_register_driver(&wfx_spi_driver); if (IS_ENABLED(CONFIG_MMC) && !ret) ret = sdio_register_driver(&wfx_sdio_driver); return ret; } module_init(wfx_core_init); static void __exit wfx_core_exit(void) { if (IS_ENABLED(CONFIG_MMC)) sdio_unregister_driver(&wfx_sdio_driver); if (IS_ENABLED(CONFIG_SPI)) spi_unregister_driver(&wfx_spi_driver); } module_exit(wfx_core_exit);