// SPDX-License-Identifier: GPL-2.0-only /* * Device probe and register. * * Copyright (c) 2017-2019, 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 #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 "debug.h" #include "data_tx.h" #include "secure_link.h" #include "hif_tx_mib.h" #include "hif_api_cmd.h" #define WFX_PDS_MAX_SIZE 1500 MODULE_DESCRIPTION("Silicon Labs 802.11 Wireless LAN driver for WFx"); MODULE_AUTHOR("Jérôme Pouiller "); MODULE_LICENSE("GPL"); static int gpio_wakeup = -2; module_param(gpio_wakeup, int, 0644); MODULE_PARM_DESC(gpio_wakeup, "gpio number for wakeup. -1 for none."); #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 = 65, .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, .conf_tx = wfx_conf_tx, .hw_scan = wfx_hw_scan, .sta_add = wfx_sta_add, .sta_remove = wfx_sta_remove, .sta_notify = wfx_sta_notify, .set_tim = wfx_set_tim, .set_key = wfx_set_key, .set_rts_threshold = wfx_set_rts_threshold, .bss_info_changed = wfx_bss_info_changed, .prepare_multicast = wfx_prepare_multicast, .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; } struct gpio_desc *wfx_get_gpio(struct device *dev, int override, const char *label) { struct gpio_desc *ret; char label_buf[256]; if (override >= 0) { snprintf(label_buf, sizeof(label_buf), "wfx_%s", label); ret = ERR_PTR(devm_gpio_request_one(dev, override, GPIOF_OUT_INIT_LOW, label_buf)); if (!ret) ret = gpio_to_desc(override); } else if (override == -1) { ret = NULL; } else { ret = devm_gpiod_get(dev, label, GPIOD_OUT_LOW); } if (IS_ERR(ret) || !ret) { if (!ret || PTR_ERR(ret) == -ENOENT) dev_warn(dev, "gpio %s is not defined\n", label); else dev_warn(dev, "error while requesting gpio %s\n", label); ret = NULL; } else { dev_dbg(dev, "using gpio %d for %s\n", desc_to_gpio(ret), label); } return ret; } /* NOTE: wfx_send_pds() destroy buf */ int wfx_send_pds(struct wfx_dev *wdev, unsigned char *buf, size_t len) { int ret; int start, brace_level, i; start = 0; brace_level = 0; if (buf[0] != '{') { dev_err(wdev->dev, "valid PDS start with '{'. Did you forget to compress it?\n"); return -EINVAL; } for (i = 1; i < len - 1; i++) { if (buf[i] == '{') brace_level++; if (buf[i] == '}') brace_level--; if (buf[i] == '}' && !brace_level) { i++; if (i - start + 1 > WFX_PDS_MAX_SIZE) return -EFBIG; buf[start] = '{'; buf[i] = 0; dev_dbg(wdev->dev, "send PDS '%s}'\n", buf + start); buf[i] = '}'; ret = hif_configuration(wdev, buf + start, i - start + 1); if (ret == HIF_STATUS_FAILURE) { dev_err(wdev->dev, "PDS bytes %d to %d: invalid data (unsupported options?)\n", start, i); return -EINVAL; } if (ret == -ETIMEDOUT) { dev_err(wdev->dev, "PDS bytes %d to %d: chip didn't reply (corrupted file?)\n", start, i); return ret; } if (ret) { dev_err(wdev->dev, "PDS bytes %d to %d: chip returned an unknown error\n", start, i); return -EIO; } buf[i] = ','; start = i; } } return 0; } static int wfx_send_pdata_pds(struct wfx_dev *wdev) { int ret = 0; const struct firmware *pds; unsigned char *tmp_buf; ret = request_firmware(&pds, wdev->pdata.file_pds, wdev->dev); if (ret) { dev_err(wdev->dev, "can't load PDS file %s\n", wdev->pdata.file_pds); return ret; } tmp_buf = kmemdup(pds->data, pds->size, GFP_KERNEL); ret = wfx_send_pds(wdev, tmp_buf, pds->size); kfree(tmp_buf); release_firmware(pds); return ret; } struct wfx_dev *wfx_init_common(struct device *dev, const struct wfx_platform_data *pdata, const struct 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, NEED_DTIM_BEFORE_ASSOC); 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 hif_sl_msg_hdr) + sizeof(struct hif_msg) + sizeof(struct 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->flags |= WIPHY_FLAG_AP_UAPSD; hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; hw->wiphy->max_ap_assoc_sta = WFX_MAX_STA_IN_AP_MODE; 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); // 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, "config-file", &wdev->pdata.file_pds); wdev->pdata.gpio_wakeup = wfx_get_gpio(dev, gpio_wakeup, "wakeup"); wfx_sl_fill_pdata(dev, &wdev->pdata); mutex_init(&wdev->conf_mutex); mutex_init(&wdev->rx_stats_lock); init_completion(&wdev->firmware_ready); wfx_init_hif_cmd(&wdev->hif_cmd); wfx_tx_queues_init(wdev); return wdev; } void wfx_free_common(struct wfx_dev *wdev) { mutex_destroy(&wdev->rx_stats_lock); mutex_destroy(&wdev->conf_mutex); wfx_tx_queues_deinit(wdev); ieee80211_free_hw(wdev->hw); } int wfx_probe(struct wfx_dev *wdev) { int i; int err; const void *macaddr; 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; wfx_bh_register(wdev); err = wfx_init_device(wdev); if (err) goto err1; err = wait_for_completion_interruptible_timeout(&wdev->firmware_ready, 10 * HZ); if (err <= 0) { if (err == 0) { dev_err(wdev->dev, "timeout while waiting for startup indication. IRQ configuration error?\n"); err = -ETIMEDOUT; } else if (err == -ERESTARTSYS) { dev_info(wdev->dev, "probe interrupted by user\n"); } goto err1; } // 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, *((u32 *) &wdev->hw_caps.capabilities)); 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 = -ENOTSUPP; goto err1; } err = wfx_sl_init(wdev); if (err && wdev->hw_caps.capabilities.link_mode == SEC_LINK_ENFORCED) { dev_err(wdev->dev, "chip require secure_link, but can't negociate it\n"); goto err1; } if (wdev->hw_caps.regul_sel_mode_info.region_sel_mode) { 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) goto err1; wdev->pdata.gpio_wakeup = gpio_saved; if (wdev->pdata.gpio_wakeup) { dev_dbg(wdev->dev, "enable 'quiescent' power mode with gpio %d and PDS file %s\n", desc_to_gpio(wdev->pdata.gpio_wakeup), wdev->pdata.file_pds); gpiod_set_value(wdev->pdata.gpio_wakeup, 1); control_reg_write(wdev, 0); hif_set_operational_mode(wdev, HIF_OP_POWER_MODE_QUIESCENT); } else { hif_set_operational_mode(wdev, HIF_OP_POWER_MODE_DOZE); } hif_use_multi_tx_conf(wdev, true); for (i = 0; i < ARRAY_SIZE(wdev->addresses); i++) { eth_zero_addr(wdev->addresses[i].addr); macaddr = of_get_mac_address(wdev->dev->of_node); if (!IS_ERR_OR_NULL(macaddr)) { ether_addr_copy(wdev->addresses[i].addr, macaddr); 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; err = ieee80211_register_hw(wdev->hw); if (err) goto err1; err = wfx_debug_init(wdev); if (err) goto err2; return 0; err2: ieee80211_unregister_hw(wdev->hw); ieee80211_free_hw(wdev->hw); err1: wfx_bh_unregister(wdev); return err; } void wfx_release(struct wfx_dev *wdev) { ieee80211_unregister_hw(wdev->hw); hif_shutdown(wdev); wfx_bh_unregister(wdev); wfx_sl_deinit(wdev); } 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);