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path: root/drivers/staging/wfx/main.c
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-rw-r--r--drivers/staging/wfx/main.c491
1 files changed, 491 insertions, 0 deletions
diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c
new file mode 100644
index 000000000000..986a2ef678b9
--- /dev/null
+++ b/drivers/staging/wfx/main.c
@@ -0,0 +1,491 @@
+// 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 <johannes@sipsolutions.net>
+ * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
+ */
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/spi/spi.h>
+#include <linux/etherdevice.h>
+#include <linux/firmware.h>
+
+#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 <jerome.pouiller@silabs.com>");
+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 = 15;
+ 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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.