diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/main.c')
| -rw-r--r-- | drivers/net/wireless/wl12xx/main.c | 1358 |
1 files changed, 1358 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c new file mode 100644 index 000000000000..603d6114882e --- /dev/null +++ b/drivers/net/wireless/wl12xx/main.c @@ -0,0 +1,1358 @@ +/* + * This file is part of wl12xx + * + * Copyright (C) 2008-2009 Nokia Corporation + * + * Contact: Kalle Valo <kalle.valo@nokia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/firmware.h> +#include <linux/delay.h> +#include <linux/irq.h> +#include <linux/spi/spi.h> +#include <linux/crc32.h> +#include <linux/etherdevice.h> +#include <linux/spi/wl12xx.h> + +#include "wl12xx.h" +#include "wl12xx_80211.h" +#include "reg.h" +#include "wl1251.h" +#include "spi.h" +#include "event.h" +#include "tx.h" +#include "rx.h" +#include "ps.h" +#include "init.h" +#include "debugfs.h" + +static void wl12xx_disable_interrupts(struct wl12xx *wl) +{ + disable_irq(wl->irq); +} + +static void wl12xx_power_off(struct wl12xx *wl) +{ + wl->set_power(false); +} + +static void wl12xx_power_on(struct wl12xx *wl) +{ + wl->set_power(true); +} + +static irqreturn_t wl12xx_irq(int irq, void *cookie) +{ + struct wl12xx *wl; + + wl12xx_debug(DEBUG_IRQ, "IRQ"); + + wl = cookie; + + schedule_work(&wl->irq_work); + + return IRQ_HANDLED; +} + +static int wl12xx_fetch_firmware(struct wl12xx *wl) +{ + const struct firmware *fw; + int ret; + + ret = request_firmware(&fw, wl->chip.fw_filename, &wl->spi->dev); + + if (ret < 0) { + wl12xx_error("could not get firmware: %d", ret); + return ret; + } + + if (fw->size % 4) { + wl12xx_error("firmware size is not multiple of 32 bits: %zu", + fw->size); + ret = -EILSEQ; + goto out; + } + + wl->fw_len = fw->size; + wl->fw = kmalloc(wl->fw_len, GFP_KERNEL); + + if (!wl->fw) { + wl12xx_error("could not allocate memory for the firmware"); + ret = -ENOMEM; + goto out; + } + + memcpy(wl->fw, fw->data, wl->fw_len); + + ret = 0; + +out: + release_firmware(fw); + + return ret; +} + +static int wl12xx_fetch_nvs(struct wl12xx *wl) +{ + const struct firmware *fw; + int ret; + + ret = request_firmware(&fw, wl->chip.nvs_filename, &wl->spi->dev); + + if (ret < 0) { + wl12xx_error("could not get nvs file: %d", ret); + return ret; + } + + if (fw->size % 4) { + wl12xx_error("nvs size is not multiple of 32 bits: %zu", + fw->size); + ret = -EILSEQ; + goto out; + } + + wl->nvs_len = fw->size; + wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL); + + if (!wl->nvs) { + wl12xx_error("could not allocate memory for the nvs file"); + ret = -ENOMEM; + goto out; + } + + memcpy(wl->nvs, fw->data, wl->nvs_len); + + ret = 0; + +out: + release_firmware(fw); + + return ret; +} + +static void wl12xx_fw_wakeup(struct wl12xx *wl) +{ + u32 elp_reg; + + elp_reg = ELPCTRL_WAKE_UP; + wl12xx_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg); + elp_reg = wl12xx_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR); + + if (!(elp_reg & ELPCTRL_WLAN_READY)) { + wl12xx_warning("WLAN not ready"); + elp_reg = ELPCTRL_WAKE_UP_WLAN_READY; + wl12xx_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg); + } +} + +static int wl12xx_chip_wakeup(struct wl12xx *wl) +{ + int ret = 0; + + wl12xx_power_on(wl); + msleep(wl->chip.power_on_sleep); + wl12xx_spi_reset(wl); + wl12xx_spi_init(wl); + + /* We don't need a real memory partition here, because we only want + * to use the registers at this point. */ + wl12xx_set_partition(wl, + 0x00000000, + 0x00000000, + REGISTERS_BASE, + REGISTERS_DOWN_SIZE); + + /* ELP module wake up */ + wl12xx_fw_wakeup(wl); + + /* whal_FwCtrl_BootSm() */ + + /* 0. read chip id from CHIP_ID */ + wl->chip.id = wl12xx_reg_read32(wl, CHIP_ID_B); + + /* 1. check if chip id is valid */ + + switch (wl->chip.id) { + case CHIP_ID_1251_PG12: + wl12xx_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)", + wl->chip.id); + + wl1251_setup(wl); + + break; + case CHIP_ID_1271_PG10: + case CHIP_ID_1251_PG10: + case CHIP_ID_1251_PG11: + default: + wl12xx_error("unsupported chip id: 0x%x", wl->chip.id); + ret = -ENODEV; + goto out; + } + + if (wl->fw == NULL) { + ret = wl12xx_fetch_firmware(wl); + if (ret < 0) + goto out; + } + + /* No NVS from netlink, try to get it from the filesystem */ + if (wl->nvs == NULL) { + ret = wl12xx_fetch_nvs(wl); + if (ret < 0) + goto out; + } + +out: + return ret; +} + +static void wl12xx_filter_work(struct work_struct *work) +{ + struct wl12xx *wl = + container_of(work, struct wl12xx, filter_work); + int ret; + + mutex_lock(&wl->mutex); + + if (wl->state == WL12XX_STATE_OFF) + goto out; + + ret = wl12xx_cmd_join(wl, wl->bss_type, 1, 100, 0); + if (ret < 0) + goto out; + +out: + mutex_unlock(&wl->mutex); +} + +int wl12xx_plt_start(struct wl12xx *wl) +{ + int ret; + + wl12xx_notice("power up"); + + if (wl->state != WL12XX_STATE_OFF) { + wl12xx_error("cannot go into PLT state because not " + "in off state: %d", wl->state); + return -EBUSY; + } + + wl->state = WL12XX_STATE_PLT; + + ret = wl12xx_chip_wakeup(wl); + if (ret < 0) + return ret; + + ret = wl->chip.op_boot(wl); + if (ret < 0) + return ret; + + wl12xx_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver); + + ret = wl->chip.op_plt_init(wl); + if (ret < 0) + return ret; + + return 0; +} + +int wl12xx_plt_stop(struct wl12xx *wl) +{ + wl12xx_notice("power down"); + + if (wl->state != WL12XX_STATE_PLT) { + wl12xx_error("cannot power down because not in PLT " + "state: %d", wl->state); + return -EBUSY; + } + + wl12xx_disable_interrupts(wl); + wl12xx_power_off(wl); + + wl->state = WL12XX_STATE_OFF; + + return 0; +} + + +static int wl12xx_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) +{ + struct wl12xx *wl = hw->priv; + + skb_queue_tail(&wl->tx_queue, skb); + + schedule_work(&wl->tx_work); + + /* + * The workqueue is slow to process the tx_queue and we need stop + * the queue here, otherwise the queue will get too long. + */ + if (skb_queue_len(&wl->tx_queue) >= WL12XX_TX_QUEUE_MAX_LENGTH) { + ieee80211_stop_queues(wl->hw); + + /* + * FIXME: this is racy, the variable is not properly + * protected. Maybe fix this by removing the stupid + * variable altogether and checking the real queue state? + */ + wl->tx_queue_stopped = true; + } + + return NETDEV_TX_OK; +} + +static int wl12xx_op_start(struct ieee80211_hw *hw) +{ + struct wl12xx *wl = hw->priv; + int ret = 0; + + wl12xx_debug(DEBUG_MAC80211, "mac80211 start"); + + mutex_lock(&wl->mutex); + + if (wl->state != WL12XX_STATE_OFF) { + wl12xx_error("cannot start because not in off state: %d", + wl->state); + ret = -EBUSY; + goto out; + } + + ret = wl12xx_chip_wakeup(wl); + if (ret < 0) + return ret; + + ret = wl->chip.op_boot(wl); + if (ret < 0) + goto out; + + ret = wl->chip.op_hw_init(wl); + if (ret < 0) + goto out; + + ret = wl12xx_acx_station_id(wl); + if (ret < 0) + goto out; + + wl->state = WL12XX_STATE_ON; + + wl12xx_info("firmware booted (%s)", wl->chip.fw_ver); + +out: + if (ret < 0) + wl12xx_power_off(wl); + + mutex_unlock(&wl->mutex); + + return ret; +} + +static void wl12xx_op_stop(struct ieee80211_hw *hw) +{ + struct wl12xx *wl = hw->priv; + + wl12xx_info("down"); + + wl12xx_debug(DEBUG_MAC80211, "mac80211 stop"); + + mutex_lock(&wl->mutex); + + WARN_ON(wl->state != WL12XX_STATE_ON); + + if (wl->scanning) { + mutex_unlock(&wl->mutex); + ieee80211_scan_completed(wl->hw, true); + mutex_lock(&wl->mutex); + wl->scanning = false; + } + + wl->state = WL12XX_STATE_OFF; + + wl12xx_disable_interrupts(wl); + + mutex_unlock(&wl->mutex); + + cancel_work_sync(&wl->irq_work); + cancel_work_sync(&wl->tx_work); + cancel_work_sync(&wl->filter_work); + + mutex_lock(&wl->mutex); + + /* let's notify MAC80211 about the remaining pending TX frames */ + wl12xx_tx_flush(wl); + + wl12xx_power_off(wl); + + memset(wl->bssid, 0, ETH_ALEN); + wl->listen_int = 1; + wl->bss_type = MAX_BSS_TYPE; + + wl->data_in_count = 0; + wl->rx_counter = 0; + wl->rx_handled = 0; + wl->rx_current_buffer = 0; + wl->rx_last_id = 0; + wl->next_tx_complete = 0; + wl->elp = false; + wl->psm = 0; + wl->tx_queue_stopped = false; + wl->power_level = WL12XX_DEFAULT_POWER_LEVEL; + + wl12xx_debugfs_reset(wl); + + mutex_unlock(&wl->mutex); +} + +static int wl12xx_op_add_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf) +{ + struct wl12xx *wl = hw->priv; + DECLARE_MAC_BUF(mac); + int ret = 0; + + wl12xx_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %s", + conf->type, print_mac(mac, conf->mac_addr)); + + mutex_lock(&wl->mutex); + + switch (conf->type) { + case NL80211_IFTYPE_STATION: + wl->bss_type = BSS_TYPE_STA_BSS; + break; + case NL80211_IFTYPE_ADHOC: + wl->bss_type = BSS_TYPE_IBSS; + break; + default: + ret = -EOPNOTSUPP; + goto out; + } + + if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) { + memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN); + SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr); + ret = wl12xx_acx_station_id(wl); + if (ret < 0) + goto out; + } + +out: + mutex_unlock(&wl->mutex); + return ret; +} + +static void wl12xx_op_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf) +{ + wl12xx_debug(DEBUG_MAC80211, "mac80211 remove interface"); +} + +static int wl12xx_build_null_data(struct wl12xx *wl) +{ + struct wl12xx_null_data_template template; + + if (!is_zero_ether_addr(wl->bssid)) { + memcpy(template.header.da, wl->bssid, ETH_ALEN); + memcpy(template.header.bssid, wl->bssid, ETH_ALEN); + } else { + memset(template.header.da, 0xff, ETH_ALEN); + memset(template.header.bssid, 0xff, ETH_ALEN); + } + + memcpy(template.header.sa, wl->mac_addr, ETH_ALEN); + template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA | + IEEE80211_STYPE_NULLFUNC); + + return wl12xx_cmd_template_set(wl, CMD_NULL_DATA, &template, + sizeof(template)); + +} + +static int wl12xx_build_ps_poll(struct wl12xx *wl, u16 aid) +{ + struct wl12xx_ps_poll_template template; + + memcpy(template.bssid, wl->bssid, ETH_ALEN); + memcpy(template.ta, wl->mac_addr, ETH_ALEN); + template.aid = aid; + template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL); + + return wl12xx_cmd_template_set(wl, CMD_PS_POLL, &template, + sizeof(template)); + +} + +static int wl12xx_op_config(struct ieee80211_hw *hw, u32 changed) +{ + struct wl12xx *wl = hw->priv; + struct ieee80211_conf *conf = &hw->conf; + int channel, ret = 0; + + channel = ieee80211_frequency_to_channel(conf->channel->center_freq); + + wl12xx_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d", + channel, + conf->flags & IEEE80211_CONF_PS ? "on" : "off", + conf->power_level); + + mutex_lock(&wl->mutex); + + if (channel != wl->channel) { + /* FIXME: use beacon interval provided by mac80211 */ + ret = wl12xx_cmd_join(wl, wl->bss_type, 1, 100, 0); + if (ret < 0) + goto out; + + wl->channel = channel; + } + + ret = wl12xx_build_null_data(wl); + if (ret < 0) + goto out; + + if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) { + wl12xx_info("psm enabled"); + + wl->psm_requested = true; + + /* + * We enter PSM only if we're already associated. + * If we're not, we'll enter it when joining an SSID, + * through the bss_info_changed() hook. + */ + ret = wl12xx_ps_set_mode(wl, STATION_POWER_SAVE_MODE); + } else if (!(conf->flags & IEEE80211_CONF_PS) && + wl->psm_requested) { + wl12xx_info("psm disabled"); + + wl->psm_requested = false; + + if (wl->psm) + ret = wl12xx_ps_set_mode(wl, STATION_ACTIVE_MODE); + } + + if (conf->power_level != wl->power_level) { + ret = wl12xx_acx_tx_power(wl, conf->power_level); + if (ret < 0) + goto out; + + wl->power_level = conf->power_level; + } + +out: + mutex_unlock(&wl->mutex); + return ret; +} + +#define WL12XX_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \ + FIF_ALLMULTI | \ + FIF_FCSFAIL | \ + FIF_BCN_PRBRESP_PROMISC | \ + FIF_CONTROL | \ + FIF_OTHER_BSS) + +static void wl12xx_op_configure_filter(struct ieee80211_hw *hw, + unsigned int changed, + unsigned int *total, + int mc_count, + struct dev_addr_list *mc_list) +{ + struct wl12xx *wl = hw->priv; + + wl12xx_debug(DEBUG_MAC80211, "mac80211 configure filter"); + + *total &= WL12XX_SUPPORTED_FILTERS; + changed &= WL12XX_SUPPORTED_FILTERS; + + if (changed == 0) + /* no filters which we support changed */ + return; + + /* FIXME: wl->rx_config and wl->rx_filter are not protected */ + + wl->rx_config = WL12XX_DEFAULT_RX_CONFIG; + wl->rx_filter = WL12XX_DEFAULT_RX_FILTER; + + if (*total & FIF_PROMISC_IN_BSS) { + wl->rx_config |= CFG_BSSID_FILTER_EN; + wl->rx_config |= CFG_RX_ALL_GOOD; + } + if (*total & FIF_ALLMULTI) + /* + * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive + * all multicast frames + */ + wl->rx_config &= ~CFG_MC_FILTER_EN; + if (*total & FIF_FCSFAIL) + wl->rx_filter |= CFG_RX_FCS_ERROR; + if (*total & FIF_BCN_PRBRESP_PROMISC) { + wl->rx_config &= ~CFG_BSSID_FILTER_EN; + wl->rx_config &= ~CFG_SSID_FILTER_EN; + } + if (*total & FIF_CONTROL) + wl->rx_filter |= CFG_RX_CTL_EN; + if (*total & FIF_OTHER_BSS) + wl->rx_filter &= ~CFG_BSSID_FILTER_EN; + + /* + * FIXME: workqueues need to be properly cancelled on stop(), for + * now let's just disable changing the filter settings. They will + * be updated any on config(). + */ + /* schedule_work(&wl->filter_work); */ +} + +/* HW encryption */ +static int wl12xx_set_key_type(struct wl12xx *wl, struct acx_set_key *key, + enum set_key_cmd cmd, + struct ieee80211_key_conf *mac80211_key, + const u8 *addr) +{ + switch (mac80211_key->alg) { + case ALG_WEP: + if (is_broadcast_ether_addr(addr)) + key->key_type = KEY_WEP_DEFAULT; + else + key->key_type = KEY_WEP_ADDR; + + mac80211_key->hw_key_idx = mac80211_key->keyidx; + break; + case ALG_TKIP: + if (is_broadcast_ether_addr(addr)) + key->key_type = KEY_TKIP_MIC_GROUP; + else + key->key_type = KEY_TKIP_MIC_PAIRWISE; + + mac80211_key->hw_key_idx = mac80211_key->keyidx; + break; + case ALG_CCMP: + if (is_broadcast_ether_addr(addr)) + key->key_type = KEY_AES_GROUP; + else + key->key_type = KEY_AES_PAIRWISE; + mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; + break; + default: + wl12xx_error("Unknown key algo 0x%x", mac80211_key->alg); + return -EOPNOTSUPP; + } + + return 0; +} + +static int wl12xx_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + struct ieee80211_key_conf *key) +{ + struct wl12xx *wl = hw->priv; + struct acx_set_key wl_key; + const u8 *addr; + int ret; + + static const u8 bcast_addr[ETH_ALEN] = + { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + + wl12xx_debug(DEBUG_MAC80211, "mac80211 set key"); + + memset(&wl_key, 0, sizeof(wl_key)); + + addr = sta ? sta->addr : bcast_addr; + + wl12xx_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd); + wl12xx_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN); + wl12xx_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x", + key->alg, key->keyidx, key->keylen, key->flags); + wl12xx_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen); + + mutex_lock(&wl->mutex); + + switch (cmd) { + case SET_KEY: + wl_key.key_action = KEY_ADD_OR_REPLACE; + break; + case DISABLE_KEY: + wl_key.key_action = KEY_REMOVE; + break; + default: + wl12xx_error("Unsupported key cmd 0x%x", cmd); + break; + } + + ret = wl12xx_set_key_type(wl, &wl_key, cmd, key, addr); + if (ret < 0) { + wl12xx_error("Set KEY type failed"); + goto out; + } + + if (wl_key.key_type != KEY_WEP_DEFAULT) + memcpy(wl_key.addr, addr, ETH_ALEN); + + if ((wl_key.key_type == KEY_TKIP_MIC_GROUP) || + (wl_key.key_type == KEY_TKIP_MIC_PAIRWISE)) { + /* + * We get the key in the following form: + * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes) + * but the target is expecting: + * TKIP - RX MIC - TX MIC + */ + memcpy(wl_key.key, key->key, 16); + memcpy(wl_key.key + 16, key->key + 24, 8); + memcpy(wl_key.key + 24, key->key + 16, 8); + + } else { + memcpy(wl_key.key, key->key, key->keylen); + } + wl_key.key_size = key->keylen; + + wl_key.id = key->keyidx; + wl_key.ssid_profile = 0; + + wl12xx_dump(DEBUG_CRYPT, "TARGET KEY: ", &wl_key, sizeof(wl_key)); + + if (wl12xx_cmd_send(wl, CMD_SET_KEYS, &wl_key, sizeof(wl_key)) < 0) { + wl12xx_error("Set KEY failed"); + ret = -EOPNOTSUPP; + goto out; + } + +out: + mutex_unlock(&wl->mutex); + return ret; +} + +static int wl12xx_build_basic_rates(char *rates) +{ + u8 index = 0; + + rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB; + rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB; + rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB; + rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB; + + return index; +} + +static int wl12xx_build_extended_rates(char *rates) +{ + u8 index = 0; + + rates[index++] = IEEE80211_OFDM_RATE_6MB; + rates[index++] = IEEE80211_OFDM_RATE_9MB; + rates[index++] = IEEE80211_OFDM_RATE_12MB; + rates[index++] = IEEE80211_OFDM_RATE_18MB; + rates[index++] = IEEE80211_OFDM_RATE_24MB; + rates[index++] = IEEE80211_OFDM_RATE_36MB; + rates[index++] = IEEE80211_OFDM_RATE_48MB; + rates[index++] = IEEE80211_OFDM_RATE_54MB; + + return index; +} + + +static int wl12xx_build_probe_req(struct wl12xx *wl, u8 *ssid, size_t ssid_len) +{ + struct wl12xx_probe_req_template template; + struct wl12xx_ie_rates *rates; + char *ptr; + u16 size; + + ptr = (char *)&template; + size = sizeof(struct ieee80211_header); + + memset(template.header.da, 0xff, ETH_ALEN); + memset(template.header.bssid, 0xff, ETH_ALEN); + memcpy(template.header.sa, wl->mac_addr, ETH_ALEN); + template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); + + /* IEs */ + /* SSID */ + template.ssid.header.id = WLAN_EID_SSID; + template.ssid.header.len = ssid_len; + if (ssid_len && ssid) + memcpy(template.ssid.ssid, ssid, ssid_len); + size += sizeof(struct wl12xx_ie_header) + ssid_len; + ptr += size; + + /* Basic Rates */ + rates = (struct wl12xx_ie_rates *)ptr; + rates->header.id = WLAN_EID_SUPP_RATES; + rates->header.len = wl12xx_build_basic_rates(rates->rates); + size += sizeof(struct wl12xx_ie_header) + rates->header.len; + ptr += sizeof(struct wl12xx_ie_header) + rates->header.len; + + /* Extended rates */ + rates = (struct wl12xx_ie_rates *)ptr; + rates->header.id = WLAN_EID_EXT_SUPP_RATES; + rates->header.len = wl12xx_build_extended_rates(rates->rates); + size += sizeof(struct wl12xx_ie_header) + rates->header.len; + + wl12xx_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size); + + return wl12xx_cmd_template_set(wl, CMD_PROBE_REQ, &template, + size); +} + +static int wl12xx_hw_scan(struct wl12xx *wl, u8 *ssid, size_t len, + u8 active_scan, u8 high_prio, u8 num_channels, + u8 probe_requests) +{ + int i, ret; + u32 split_scan = 0; + u16 scan_options = 0; + struct cmd_scan *params; + struct wl12xx_command *cmd_answer; + + if (wl->scanning) + return -EINVAL; + + params = kzalloc(sizeof(*params), GFP_KERNEL); + if (!params) + return -ENOMEM; + + params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD); + params->params.rx_filter_options = + cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN); + + /* High priority scan */ + if (!active_scan) + scan_options |= SCAN_PASSIVE; + if (high_prio) + scan_options |= SCAN_PRIORITY_HIGH; + params->params.scan_options = scan_options; + + params->params.num_channels = num_channels; + params->params.num_probe_requests = probe_requests; + params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */ + params->params.tid_trigger = 0; + + for (i = 0; i < num_channels; i++) { + params->channels[i].min_duration = cpu_to_le32(30000); + params->channels[i].max_duration = cpu_to_le32(60000); + memset(¶ms->channels[i].bssid_lsb, 0xff, 4); + memset(¶ms->channels[i].bssid_msb, 0xff, 2); + params->channels[i].early_termination = 0; + params->channels[i].tx_power_att = 0; + params->channels[i].channel = i + 1; + memset(params->channels[i].pad, 0, 3); + } + + for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++) + memset(¶ms->channels[i], 0, + sizeof(struct basic_scan_channel_parameters)); + + if (len && ssid) { + params->params.ssid_len = len; + memcpy(params->params.ssid, ssid, len); + } else { + params->params.ssid_len = 0; + memset(params->params.ssid, 0, 32); + } + + ret = wl12xx_build_probe_req(wl, ssid, len); + if (ret < 0) { + wl12xx_error("PROBE request template failed"); + goto out; + } + + ret = wl12xx_cmd_send(wl, CMD_TRIGGER_SCAN_TO, &split_scan, + sizeof(u32)); + if (ret < 0) { + wl12xx_error("Split SCAN failed"); + goto out; + } + + wl12xx_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params)); + + wl->scanning = true; + + ret = wl12xx_cmd_send(wl, CMD_SCAN, params, sizeof(*params)); + if (ret < 0) + wl12xx_error("SCAN failed"); + + wl12xx_spi_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params)); + + cmd_answer = (struct wl12xx_command *) params; + if (cmd_answer->status != CMD_STATUS_SUCCESS) { + wl12xx_error("TEST command answer error: %d", + cmd_answer->status); + wl->scanning = false; + ret = -EIO; + goto out; + } + +out: + kfree(params); + return ret; + +} + +static int wl12xx_op_hw_scan(struct ieee80211_hw *hw, + struct cfg80211_scan_request *req) +{ + struct wl12xx *wl = hw->priv; + int ret; + u8 *ssid = NULL; + size_t ssid_len = 0; + + wl12xx_debug(DEBUG_MAC80211, "mac80211 hw scan"); + + if (req->n_ssids) { + ssid = req->ssids[0].ssid; + ssid_len = req->ssids[0].ssid_len; + } + + mutex_lock(&wl->mutex); + ret = wl12xx_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3); + mutex_unlock(&wl->mutex); + + return ret; +} + +static int wl12xx_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value) +{ + struct wl12xx *wl = hw->priv; + int ret; + + ret = wl12xx_acx_rts_threshold(wl, (u16) value); + + if (ret < 0) + wl12xx_warning("wl12xx_op_set_rts_threshold failed: %d", ret); + + return ret; +} + +static void wl12xx_op_bss_info_changed(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_bss_conf *bss_conf, + u32 changed) +{ + enum acx_ps_mode mode; + struct wl12xx *wl = hw->priv; + struct sk_buff *beacon; + int ret; + + wl12xx_debug(DEBUG_MAC80211, "mac80211 bss info changed"); + + mutex_lock(&wl->mutex); + + if (changed & BSS_CHANGED_ASSOC) { + if (bss_conf->assoc) { + wl->aid = bss_conf->aid; + + ret = wl12xx_build_ps_poll(wl, wl->aid); + if (ret < 0) + goto out; + + ret = wl12xx_acx_aid(wl, wl->aid); + if (ret < 0) + goto out; + + /* If we want to go in PSM but we're not there yet */ + if (wl->psm_requested && !wl->psm) { + mode = STATION_POWER_SAVE_MODE; + ret = wl12xx_ps_set_mode(wl, mode); + if (ret < 0) + goto out; + } + } + } + if (changed & BSS_CHANGED_ERP_SLOT) { + if (bss_conf->use_short_slot) + ret = wl12xx_acx_slot(wl, SLOT_TIME_SHORT); + else + ret = wl12xx_acx_slot(wl, SLOT_TIME_LONG); + if (ret < 0) { + wl12xx_warning("Set slot time failed %d", ret); + goto out; + } + } + + if (changed & BSS_CHANGED_ERP_PREAMBLE) { + if (bss_conf->use_short_preamble) + wl12xx_acx_set_preamble(wl, ACX_PREAMBLE_SHORT); + else + wl12xx_acx_set_preamble(wl, ACX_PREAMBLE_LONG); + } + + if (changed & BSS_CHANGED_ERP_CTS_PROT) { + if (bss_conf->use_cts_prot) + ret = wl12xx_acx_cts_protect(wl, CTSPROTECT_ENABLE); + else + ret = wl12xx_acx_cts_protect(wl, CTSPROTECT_DISABLE); + if (ret < 0) { + wl12xx_warning("Set ctsprotect failed %d", ret); + goto out; + } + } + + if (changed & BSS_CHANGED_BSSID) { + memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN); + + ret = wl12xx_build_null_data(wl); + if (ret < 0) + goto out; + + if (wl->bss_type != BSS_TYPE_IBSS) { + ret = wl12xx_cmd_join(wl, wl->bss_type, 5, 100, 1); + if (ret < 0) + goto out; + } + } + + if (changed & BSS_CHANGED_BEACON) { + beacon = ieee80211_beacon_get(hw, vif); + ret = wl12xx_cmd_template_set(wl, CMD_BEACON, beacon->data, + beacon->len); + + if (ret < 0) { + dev_kfree_skb(beacon); + goto out; + } + + ret = wl12xx_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data, + beacon->len); + + dev_kfree_skb(beacon); + + if (ret < 0) + goto out; + + ret = wl12xx_cmd_join(wl, wl->bss_type, 1, 100, 0); + + if (ret < 0) + goto out; + } + +out: + mutex_unlock(&wl->mutex); +} + + +/* can't be const, mac80211 writes to this */ +static struct ieee80211_rate wl12xx_rates[] = { + { .bitrate = 10, + .hw_value = 0x1, + .hw_value_short = 0x1, }, + { .bitrate = 20, + .hw_value = 0x2, + .hw_value_short = 0x2, + .flags = IEEE80211_RATE_SHORT_PREAMBLE }, + { .bitrate = 55, + .hw_value = 0x4, + .hw_value_short = 0x4, + .flags = IEEE80211_RATE_SHORT_PREAMBLE }, + { .bitrate = 110, + .hw_value = 0x20, + .hw_value_short = 0x20, + .flags = IEEE80211_RATE_SHORT_PREAMBLE }, + { .bitrate = 60, + .hw_value = 0x8, + .hw_value_short = 0x8, }, + { .bitrate = 90, + .hw_value = 0x10, + .hw_value_short = 0x10, }, + { .bitrate = 120, + .hw_value = 0x40, + .hw_value_short = 0x40, }, + { .bitrate = 180, + .hw_value = 0x80, + .hw_value_short = 0x80, }, + { .bitrate = 240, + .hw_value = 0x200, + .hw_value_short = 0x200, }, + { .bitrate = 360, + .hw_value = 0x400, + .hw_value_short = 0x400, }, + { .bitrate = 480, + .hw_value = 0x800, + .hw_value_short = 0x800, }, + { .bitrate = 540, + .hw_value = 0x1000, + .hw_value_short = 0x1000, }, +}; + +/* can't be const, mac80211 writes to this */ +static struct ieee80211_channel wl12xx_channels[] = { + { .hw_value = 1, .center_freq = 2412}, + { .hw_value = 2, .center_freq = 2417}, + { .hw_value = 3, .center_freq = 2422}, + { .hw_value = 4, .center_freq = 2427}, + { .hw_value = 5, .center_freq = 2432}, + { .hw_value = 6, .center_freq = 2437}, + { .hw_value = 7, .center_freq = 2442}, + { .hw_value = 8, .center_freq = 2447}, + { .hw_value = 9, .center_freq = 2452}, + { .hw_value = 10, .center_freq = 2457}, + { .hw_value = 11, .center_freq = 2462}, + { .hw_value = 12, .center_freq = 2467}, + { .hw_value = 13, .center_freq = 2472}, +}; + +/* can't be const, mac80211 writes to this */ +static struct ieee80211_supported_band wl12xx_band_2ghz = { + .channels = wl12xx_channels, + .n_channels = ARRAY_SIZE(wl12xx_channels), + .bitrates = wl12xx_rates, + .n_bitrates = ARRAY_SIZE(wl12xx_rates), +}; + +static const struct ieee80211_ops wl12xx_ops = { + .start = wl12xx_op_start, + .stop = wl12xx_op_stop, + .add_interface = wl12xx_op_add_interface, + .remove_interface = wl12xx_op_remove_interface, + .config = wl12xx_op_config, + .configure_filter = wl12xx_op_configure_filter, + .tx = wl12xx_op_tx, + .set_key = wl12xx_op_set_key, + .hw_scan = wl12xx_op_hw_scan, + .bss_info_changed = wl12xx_op_bss_info_changed, + .set_rts_threshold = wl12xx_op_set_rts_threshold, +}; + +static int wl12xx_register_hw(struct wl12xx *wl) +{ + int ret; + + if (wl->mac80211_registered) + return 0; + + SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr); + + ret = ieee80211_register_hw(wl->hw); + if (ret < 0) { + wl12xx_error("unable to register mac80211 hw: %d", ret); + return ret; + } + + wl->mac80211_registered = true; + + wl12xx_notice("loaded"); + + return 0; +} + +static int wl12xx_init_ieee80211(struct wl12xx *wl) +{ + /* The tx descriptor buffer and the TKIP space */ + wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc) + + WL12XX_TKIP_IV_SPACE; + + /* unit us */ + /* FIXME: find a proper value */ + wl->hw->channel_change_time = 10000; + + wl->hw->flags = IEEE80211_HW_SIGNAL_DBM | + IEEE80211_HW_NOISE_DBM; + + wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION); + wl->hw->wiphy->max_scan_ssids = 1; + wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl12xx_band_2ghz; + + SET_IEEE80211_DEV(wl->hw, &wl->spi->dev); + + return 0; +} + +#define WL12XX_DEFAULT_CHANNEL 1 +static int __devinit wl12xx_probe(struct spi_device *spi) +{ + struct wl12xx_platform_data *pdata; + struct ieee80211_hw *hw; + struct wl12xx *wl; + int ret, i; + static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf}; + + pdata = spi->dev.platform_data; + if (!pdata) { + wl12xx_error("no platform data"); + return -ENODEV; + } + + hw = ieee80211_alloc_hw(sizeof(*wl), &wl12xx_ops); + if (!hw) { + wl12xx_error("could not alloc ieee80211_hw"); + return -ENOMEM; + } + + wl = hw->priv; + memset(wl, 0, sizeof(*wl)); + + wl->hw = hw; + dev_set_drvdata(&spi->dev, wl); + wl->spi = spi; + + wl->data_in_count = 0; + + skb_queue_head_init(&wl->tx_queue); + + INIT_WORK(&wl->tx_work, wl12xx_tx_work); + INIT_WORK(&wl->filter_work, wl12xx_filter_work); + wl->channel = WL12XX_DEFAULT_CHANNEL; + wl->scanning = false; + wl->default_key = 0; + wl->listen_int = 1; + wl->rx_counter = 0; + wl->rx_handled = 0; + wl->rx_current_buffer = 0; + wl->rx_last_id = 0; + wl->rx_config = WL12XX_DEFAULT_RX_CONFIG; + wl->rx_filter = WL12XX_DEFAULT_RX_FILTER; + wl->elp = false; + wl->psm = 0; + wl->psm_requested = false; + wl->tx_queue_stopped = false; + wl->power_level = WL12XX_DEFAULT_POWER_LEVEL; + + /* We use the default power on sleep time until we know which chip + * we're using */ + wl->chip.power_on_sleep = WL12XX_DEFAULT_POWER_ON_SLEEP; + + for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++) + wl->tx_frames[i] = NULL; + + wl->next_tx_complete = 0; + + /* + * In case our MAC address is not correctly set, + * we use a random but Nokia MAC. + */ + memcpy(wl->mac_addr, nokia_oui, 3); + get_random_bytes(wl->mac_addr + 3, 3); + + wl->state = WL12XX_STATE_OFF; + mutex_init(&wl->mutex); + + wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE; + wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE; + + /* This is the only SPI value that we need to set here, the rest + * comes from the board-peripherals file */ + spi->bits_per_word = 32; + + ret = spi_setup(spi); + if (ret < 0) { + wl12xx_error("spi_setup failed"); + goto out_free; + } + + wl->set_power = pdata->set_power; + if (!wl->set_power) { + wl12xx_error("set power function missing in platform data"); + return -ENODEV; + } + + wl->irq = spi->irq; + if (wl->irq < 0) { + wl12xx_error("irq missing in platform data"); + return -ENODEV; + } + + ret = request_irq(wl->irq, wl12xx_irq, 0, DRIVER_NAME, wl); + if (ret < 0) { + wl12xx_error("request_irq() failed: %d", ret); + goto out_free; + } + + set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING); + + disable_irq(wl->irq); + + ret = wl12xx_init_ieee80211(wl); + if (ret) + goto out_irq; + + ret = wl12xx_register_hw(wl); + if (ret) + goto out_irq; + + wl12xx_debugfs_init(wl); + + wl12xx_notice("initialized"); + + return 0; + + out_irq: + free_irq(wl->irq, wl); + + out_free: + ieee80211_free_hw(hw); + + return ret; +} + +static int __devexit wl12xx_remove(struct spi_device *spi) +{ + struct wl12xx *wl = dev_get_drvdata(&spi->dev); + + ieee80211_unregister_hw(wl->hw); + + wl12xx_debugfs_exit(wl); + + free_irq(wl->irq, wl); + kfree(wl->target_mem_map); + kfree(wl->data_path); + kfree(wl->fw); + wl->fw = NULL; + kfree(wl->nvs); + wl->nvs = NULL; + ieee80211_free_hw(wl->hw); + + return 0; +} + + +static struct spi_driver wl12xx_spi_driver = { + .driver = { + .name = "wl12xx", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + + .probe = wl12xx_probe, + .remove = __devexit_p(wl12xx_remove), +}; + +static int __init wl12xx_init(void) +{ + int ret; + + ret = spi_register_driver(&wl12xx_spi_driver); + if (ret < 0) { + wl12xx_error("failed to register spi driver: %d", ret); + goto out; + } + +out: + return ret; +} + +static void __exit wl12xx_exit(void) +{ + spi_unregister_driver(&wl12xx_spi_driver); + + wl12xx_notice("unloaded"); +} + +module_init(wl12xx_init); +module_exit(wl12xx_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>, " + "Luciano Coelho <luciano.coelho@nokia.com>"); |