diff options
Diffstat (limited to 'drivers/net/wireless/mwl8k.c')
| -rw-r--r-- | drivers/net/wireless/mwl8k.c | 3789 |
1 files changed, 3789 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c new file mode 100644 index 0000000..57a0268 --- /dev/null +++ b/drivers/net/wireless/mwl8k.c @@ -0,0 +1,3789 @@ +/* + * drivers/net/wireless/mwl8k.c driver for Marvell TOPDOG 802.11 Wireless cards + * + * Copyright (C) 2008 Marvell Semiconductor Inc. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/spinlock.h> +#include <linux/list.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/completion.h> +#include <linux/etherdevice.h> +#include <net/mac80211.h> +#include <linux/moduleparam.h> +#include <linux/firmware.h> +#include <linux/workqueue.h> + +#define MWL8K_DESC "Marvell TOPDOG(R) 802.11 Wireless Network Driver" +#define MWL8K_NAME KBUILD_MODNAME +#define MWL8K_VERSION "0.9.1" + +MODULE_DESCRIPTION(MWL8K_DESC); +MODULE_VERSION(MWL8K_VERSION); +MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>"); +MODULE_LICENSE("GPL"); + +static DEFINE_PCI_DEVICE_TABLE(mwl8k_table) = { + { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = 8687, }, + { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = 8687, }, + { } +}; +MODULE_DEVICE_TABLE(pci, mwl8k_table); + +#define IEEE80211_ADDR_LEN ETH_ALEN + +/* Register definitions */ +#define MWL8K_HIU_GEN_PTR 0x00000c10 +#define MWL8K_MODE_STA 0x0000005a +#define MWL8K_MODE_AP 0x000000a5 +#define MWL8K_HIU_INT_CODE 0x00000c14 +#define MWL8K_FWSTA_READY 0xf0f1f2f4 +#define MWL8K_FWAP_READY 0xf1f2f4a5 +#define MWL8K_INT_CODE_CMD_FINISHED 0x00000005 +#define MWL8K_HIU_SCRATCH 0x00000c40 + +/* Host->device communications */ +#define MWL8K_HIU_H2A_INTERRUPT_EVENTS 0x00000c18 +#define MWL8K_HIU_H2A_INTERRUPT_STATUS 0x00000c1c +#define MWL8K_HIU_H2A_INTERRUPT_MASK 0x00000c20 +#define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL 0x00000c24 +#define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK 0x00000c28 +#define MWL8K_H2A_INT_DUMMY (1 << 20) +#define MWL8K_H2A_INT_RESET (1 << 15) +#define MWL8K_H2A_INT_PS (1 << 2) +#define MWL8K_H2A_INT_DOORBELL (1 << 1) +#define MWL8K_H2A_INT_PPA_READY (1 << 0) + +/* Device->host communications */ +#define MWL8K_HIU_A2H_INTERRUPT_EVENTS 0x00000c2c +#define MWL8K_HIU_A2H_INTERRUPT_STATUS 0x00000c30 +#define MWL8K_HIU_A2H_INTERRUPT_MASK 0x00000c34 +#define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL 0x00000c38 +#define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK 0x00000c3c +#define MWL8K_A2H_INT_DUMMY (1 << 20) +#define MWL8K_A2H_INT_CHNL_SWITCHED (1 << 11) +#define MWL8K_A2H_INT_QUEUE_EMPTY (1 << 10) +#define MWL8K_A2H_INT_RADAR_DETECT (1 << 7) +#define MWL8K_A2H_INT_RADIO_ON (1 << 6) +#define MWL8K_A2H_INT_RADIO_OFF (1 << 5) +#define MWL8K_A2H_INT_MAC_EVENT (1 << 3) +#define MWL8K_A2H_INT_OPC_DONE (1 << 2) +#define MWL8K_A2H_INT_RX_READY (1 << 1) +#define MWL8K_A2H_INT_TX_DONE (1 << 0) + +#define MWL8K_A2H_EVENTS (MWL8K_A2H_INT_DUMMY | \ + MWL8K_A2H_INT_CHNL_SWITCHED | \ + MWL8K_A2H_INT_QUEUE_EMPTY | \ + MWL8K_A2H_INT_RADAR_DETECT | \ + MWL8K_A2H_INT_RADIO_ON | \ + MWL8K_A2H_INT_RADIO_OFF | \ + MWL8K_A2H_INT_MAC_EVENT | \ + MWL8K_A2H_INT_OPC_DONE | \ + MWL8K_A2H_INT_RX_READY | \ + MWL8K_A2H_INT_TX_DONE) + +/* WME stream classes */ +#define WME_AC_BE 0 /* best effort */ +#define WME_AC_BK 1 /* background */ +#define WME_AC_VI 2 /* video */ +#define WME_AC_VO 3 /* voice */ + +#define MWL8K_RX_QUEUES 1 +#define MWL8K_TX_QUEUES 4 + +struct mwl8k_rx_queue { + int rx_desc_count; + + /* hw receives here */ + int rx_head; + + /* refill descs here */ + int rx_tail; + + struct mwl8k_rx_desc *rx_desc_area; + dma_addr_t rx_desc_dma; + struct sk_buff **rx_skb; +}; + +struct mwl8k_skb { + /* + * The DMA engine requires a modification to the payload. + * If the skbuff is shared/cloned, it needs to be unshared. + * This method is used to ensure the stack always gets back + * the skbuff it sent for transmission. + */ + struct sk_buff *clone; + struct sk_buff *skb; +}; + +struct mwl8k_tx_queue { + /* hw transmits here */ + int tx_head; + + /* sw appends here */ + int tx_tail; + + struct ieee80211_tx_queue_stats tx_stats; + struct mwl8k_tx_desc *tx_desc_area; + dma_addr_t tx_desc_dma; + struct mwl8k_skb *tx_skb; +}; + +/* Pointers to the firmware data and meta information about it. */ +struct mwl8k_firmware { + /* Microcode */ + struct firmware *ucode; + + /* Boot helper code */ + struct firmware *helper; +}; + +struct mwl8k_priv { + void __iomem *regs; + struct ieee80211_hw *hw; + + struct pci_dev *pdev; + u8 name[16]; + /* firmware access lock */ + spinlock_t fw_lock; + + /* firmware files and meta data */ + struct mwl8k_firmware fw; + u32 part_num; + + /* lock held over TX and TX reap */ + spinlock_t tx_lock; + u32 int_mask; + + struct ieee80211_vif *vif; + struct list_head vif_list; + + struct ieee80211_channel *current_channel; + + /* power management status cookie from firmware */ + u32 *cookie; + dma_addr_t cookie_dma; + + u16 num_mcaddrs; + u16 region_code; + u8 hw_rev; + __le32 fw_rev; + u32 wep_enabled; + + /* + * Running count of TX packets in flight, to avoid + * iterating over the transmit rings each time. + */ + int pending_tx_pkts; + + struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES]; + struct mwl8k_tx_queue txq[MWL8K_TX_QUEUES]; + + /* PHY parameters */ + struct ieee80211_supported_band band; + struct ieee80211_channel channels[14]; + struct ieee80211_rate rates[12]; + + /* RF preamble: Short, Long or Auto */ + u8 radio_preamble; + u8 radio_state; + + /* WMM MODE 1 for enabled; 0 for disabled */ + bool wmm_mode; + + /* Set if PHY config is in progress */ + bool inconfig; + + /* XXX need to convert this to handle multiple interfaces */ + bool capture_beacon; + u8 capture_bssid[IEEE80211_ADDR_LEN]; + struct sk_buff *beacon_skb; + + /* + * This FJ worker has to be global as it is scheduled from the + * RX handler. At this point we don't know which interface it + * belongs to until the list of bssids waiting to complete join + * is checked. + */ + struct work_struct finalize_join_worker; + + /* Tasklet to reclaim TX descriptors and buffers after tx */ + struct tasklet_struct tx_reclaim_task; + + /* Work thread to serialize configuration requests */ + struct workqueue_struct *config_wq; + struct completion *hostcmd_wait; + struct completion *tx_wait; +}; + +/* Per interface specific private data */ +struct mwl8k_vif { + struct list_head node; + + /* backpointer to parent config block */ + struct mwl8k_priv *priv; + + /* BSS config of AP or IBSS from mac80211*/ + struct ieee80211_bss_conf bss_info; + + /* BSSID of AP or IBSS */ + u8 bssid[IEEE80211_ADDR_LEN]; + u8 mac_addr[IEEE80211_ADDR_LEN]; + + /* + * Subset of supported legacy rates. + * Intersection of AP and STA supported rates. + */ + struct ieee80211_rate legacy_rates[12]; + + /* number of supported legacy rates */ + u8 legacy_nrates; + + /* Number of supported MCS rates. Work in progress */ + u8 mcs_nrates; + + /* Index into station database.Returned by update_sta_db call */ + u8 peer_id; + + /* Non AMPDU sequence number assigned by driver */ + u16 seqno; + + /* Note:There is no channel info, + * refer to the master channel info in priv + */ +}; + +#define MWL8K_VIF(_vif) (struct mwl8k_vif *)(&((_vif)->drv_priv)) + +static const struct ieee80211_channel mwl8k_channels[] = { + { .center_freq = 2412, .hw_value = 1, }, + { .center_freq = 2417, .hw_value = 2, }, + { .center_freq = 2422, .hw_value = 3, }, + { .center_freq = 2427, .hw_value = 4, }, + { .center_freq = 2432, .hw_value = 5, }, + { .center_freq = 2437, .hw_value = 6, }, + { .center_freq = 2442, .hw_value = 7, }, + { .center_freq = 2447, .hw_value = 8, }, + { .center_freq = 2452, .hw_value = 9, }, + { .center_freq = 2457, .hw_value = 10, }, + { .center_freq = 2462, .hw_value = 11, }, +}; + +static const struct ieee80211_rate mwl8k_rates[] = { + { .bitrate = 10, .hw_value = 2, }, + { .bitrate = 20, .hw_value = 4, }, + { .bitrate = 55, .hw_value = 11, }, + { .bitrate = 60, .hw_value = 12, }, + { .bitrate = 90, .hw_value = 18, }, + { .bitrate = 110, .hw_value = 22, }, + { .bitrate = 120, .hw_value = 24, }, + { .bitrate = 180, .hw_value = 36, }, + { .bitrate = 240, .hw_value = 48, }, + { .bitrate = 360, .hw_value = 72, }, + { .bitrate = 480, .hw_value = 96, }, + { .bitrate = 540, .hw_value = 108, }, +}; + +/* Radio settings */ +#define MWL8K_RADIO_FORCE 0x2 +#define MWL8K_RADIO_ENABLE 0x1 +#define MWL8K_RADIO_DISABLE 0x0 +#define MWL8K_RADIO_AUTO_PREAMBLE 0x0005 +#define MWL8K_RADIO_SHORT_PREAMBLE 0x0003 +#define MWL8K_RADIO_LONG_PREAMBLE 0x0001 + +/* WMM */ +#define MWL8K_WMM_ENABLE 1 +#define MWL8K_WMM_DISABLE 0 + +#define MWL8K_RADIO_DEFAULT_PREAMBLE MWL8K_RADIO_LONG_PREAMBLE + +/* Slot time */ + +/* Short Slot: 9us slot time */ +#define MWL8K_SHORT_SLOTTIME 1 + +/* Long slot: 20us slot time */ +#define MWL8K_LONG_SLOTTIME 0 + +/* Set or get info from Firmware */ +#define MWL8K_CMD_SET 0x0001 +#define MWL8K_CMD_GET 0x0000 + +/* Firmware command codes */ +#define MWL8K_CMD_CODE_DNLD 0x0001 +#define MWL8K_CMD_GET_HW_SPEC 0x0003 +#define MWL8K_CMD_MAC_MULTICAST_ADR 0x0010 +#define MWL8K_CMD_GET_STAT 0x0014 +#define MWL8K_CMD_RADIO_CONTROL 0x001C +#define MWL8K_CMD_RF_TX_POWER 0x001E +#define MWL8K_CMD_SET_PRE_SCAN 0x0107 +#define MWL8K_CMD_SET_POST_SCAN 0x0108 +#define MWL8K_CMD_SET_RF_CHANNEL 0x010A +#define MWL8K_CMD_SET_SLOT 0x0114 +#define MWL8K_CMD_MIMO_CONFIG 0x0125 +#define MWL8K_CMD_ENABLE_SNIFFER 0x0150 +#define MWL8K_CMD_SET_WMM_MODE 0x0123 +#define MWL8K_CMD_SET_EDCA_PARAMS 0x0115 +#define MWL8K_CMD_SET_FINALIZE_JOIN 0x0111 +#define MWL8K_CMD_UPDATE_STADB 0x1123 +#define MWL8K_CMD_SET_RATEADAPT_MODE 0x0203 +#define MWL8K_CMD_SET_LINKADAPT_MODE 0x0129 +#define MWL8K_CMD_SET_AID 0x010d +#define MWL8K_CMD_SET_RATE 0x0110 +#define MWL8K_CMD_USE_FIXED_RATE 0x0126 +#define MWL8K_CMD_RTS_THRESHOLD 0x0113 +#define MWL8K_CMD_ENCRYPTION 0x1122 + +static const char *mwl8k_cmd_name(u16 cmd, char *buf, int bufsize) +{ +#define MWL8K_CMDNAME(x) case MWL8K_CMD_##x: do {\ + snprintf(buf, bufsize, "%s", #x);\ + return buf;\ + } while (0) + switch (cmd & (~0x8000)) { + MWL8K_CMDNAME(CODE_DNLD); + MWL8K_CMDNAME(GET_HW_SPEC); + MWL8K_CMDNAME(MAC_MULTICAST_ADR); + MWL8K_CMDNAME(GET_STAT); + MWL8K_CMDNAME(RADIO_CONTROL); + MWL8K_CMDNAME(RF_TX_POWER); + MWL8K_CMDNAME(SET_PRE_SCAN); + MWL8K_CMDNAME(SET_POST_SCAN); + MWL8K_CMDNAME(SET_RF_CHANNEL); + MWL8K_CMDNAME(SET_SLOT); + MWL8K_CMDNAME(MIMO_CONFIG); + MWL8K_CMDNAME(ENABLE_SNIFFER); + MWL8K_CMDNAME(SET_WMM_MODE); + MWL8K_CMDNAME(SET_EDCA_PARAMS); + MWL8K_CMDNAME(SET_FINALIZE_JOIN); + MWL8K_CMDNAME(UPDATE_STADB); + MWL8K_CMDNAME(SET_RATEADAPT_MODE); + MWL8K_CMDNAME(SET_LINKADAPT_MODE); + MWL8K_CMDNAME(SET_AID); + MWL8K_CMDNAME(SET_RATE); + MWL8K_CMDNAME(USE_FIXED_RATE); + MWL8K_CMDNAME(RTS_THRESHOLD); + MWL8K_CMDNAME(ENCRYPTION); + default: + snprintf(buf, bufsize, "0x%x", cmd); + } +#undef MWL8K_CMDNAME + + return buf; +} + +/* Hardware and firmware reset */ +static void mwl8k_hw_reset(struct mwl8k_priv *priv) +{ + iowrite32(MWL8K_H2A_INT_RESET, + priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + iowrite32(MWL8K_H2A_INT_RESET, + priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + msleep(20); +} + +/* Release fw image */ +static void mwl8k_release_fw(struct firmware **fw) +{ + if (*fw == NULL) + return; + release_firmware(*fw); + *fw = NULL; +} + +static void mwl8k_release_firmware(struct mwl8k_priv *priv) +{ + mwl8k_release_fw(&priv->fw.ucode); + mwl8k_release_fw(&priv->fw.helper); +} + +/* Request fw image */ +static int mwl8k_request_fw(struct mwl8k_priv *priv, + const char *fname, struct firmware **fw) +{ + /* release current image */ + if (*fw != NULL) + mwl8k_release_fw(fw); + + return request_firmware((const struct firmware **)fw, + fname, &priv->pdev->dev); +} + +static int mwl8k_request_firmware(struct mwl8k_priv *priv, u32 part_num) +{ + u8 filename[64]; + int rc; + + priv->part_num = part_num; + + snprintf(filename, sizeof(filename), + "mwl8k/helper_%u.fw", priv->part_num); + + rc = mwl8k_request_fw(priv, filename, &priv->fw.helper); + if (rc) { + printk(KERN_ERR + "%s Error requesting helper firmware file %s\n", + pci_name(priv->pdev), filename); + return rc; + } + + snprintf(filename, sizeof(filename), + "mwl8k/fmimage_%u.fw", priv->part_num); + + rc = mwl8k_request_fw(priv, filename, &priv->fw.ucode); + if (rc) { + printk(KERN_ERR "%s Error requesting firmware file %s\n", + pci_name(priv->pdev), filename); + mwl8k_release_fw(&priv->fw.helper); + return rc; + } + + return 0; +} + +struct mwl8k_cmd_pkt { + __le16 code; + __le16 length; + __le16 seq_num; + __le16 result; + char payload[0]; +} __attribute__((packed)); + +/* + * Firmware loading. + */ +static int +mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length) +{ + void __iomem *regs = priv->regs; + dma_addr_t dma_addr; + int rc; + int loops; + + dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE); + if (pci_dma_mapping_error(priv->pdev, dma_addr)) + return -ENOMEM; + + iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR); + iowrite32(0, regs + MWL8K_HIU_INT_CODE); + iowrite32(MWL8K_H2A_INT_DOORBELL, + regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + iowrite32(MWL8K_H2A_INT_DUMMY, + regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + + rc = -ETIMEDOUT; + loops = 1000; + do { + u32 int_code; + + int_code = ioread32(regs + MWL8K_HIU_INT_CODE); + if (int_code == MWL8K_INT_CODE_CMD_FINISHED) { + iowrite32(0, regs + MWL8K_HIU_INT_CODE); + rc = 0; + break; + } + + udelay(1); + } while (--loops); + + pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE); + + /* + * Clear 'command done' interrupt bit. + */ + loops = 1000; + do { + u32 status; + + status = ioread32(priv->regs + + MWL8K_HIU_A2H_INTERRUPT_STATUS); + if (status & MWL8K_A2H_INT_OPC_DONE) { + iowrite32(~MWL8K_A2H_INT_OPC_DONE, + priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + break; + } + + udelay(1); + } while (--loops); + + return rc; +} + +static int mwl8k_load_fw_image(struct mwl8k_priv *priv, + const u8 *data, size_t length) +{ + struct mwl8k_cmd_pkt *cmd; + int done; + int rc = 0; + + cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD); + cmd->seq_num = 0; + cmd->result = 0; + + done = 0; + while (length) { + int block_size = length > 256 ? 256 : length; + + memcpy(cmd->payload, data + done, block_size); + cmd->length = cpu_to_le16(block_size); + + rc = mwl8k_send_fw_load_cmd(priv, cmd, + sizeof(*cmd) + block_size); + if (rc) + break; + + done += block_size; + length -= block_size; + } + + if (!rc) { + cmd->length = 0; + rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd)); + } + + kfree(cmd); + + return rc; +} + +static int mwl8k_feed_fw_image(struct mwl8k_priv *priv, + const u8 *data, size_t length) +{ + unsigned char *buffer; + int may_continue, rc = 0; + u32 done, prev_block_size; + + buffer = kmalloc(1024, GFP_KERNEL); + if (buffer == NULL) + return -ENOMEM; + + done = 0; + prev_block_size = 0; + may_continue = 1000; + while (may_continue > 0) { + u32 block_size; + + block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH); + if (block_size & 1) { + block_size &= ~1; + may_continue--; + } else { + done += prev_block_size; + length -= prev_block_size; + } + + if (block_size > 1024 || block_size > length) { + rc = -EOVERFLOW; + break; + } + + if (length == 0) { + rc = 0; + break; + } + + if (block_size == 0) { + rc = -EPROTO; + may_continue--; + udelay(1); + continue; + } + + prev_block_size = block_size; + memcpy(buffer, data + done, block_size); + + rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size); + if (rc) + break; + } + + if (!rc && length != 0) + rc = -EREMOTEIO; + + kfree(buffer); + + return rc; +} + +static int mwl8k_load_firmware(struct mwl8k_priv *priv) +{ + int loops, rc; + + const u8 *ucode = priv->fw.ucode->data; + size_t ucode_len = priv->fw.ucode->size; + const u8 *helper = priv->fw.helper->data; + size_t helper_len = priv->fw.helper->size; + + if (!memcmp(ucode, "\x01\x00\x00\x00", 4)) { + rc = mwl8k_load_fw_image(priv, helper, helper_len); + if (rc) { + printk(KERN_ERR "%s: unable to load firmware " + "helper image\n", pci_name(priv->pdev)); + return rc; + } + msleep(1); + + rc = mwl8k_feed_fw_image(priv, ucode, ucode_len); + } else { + rc = mwl8k_load_fw_image(priv, ucode, ucode_len); + } + + if (rc) { + printk(KERN_ERR "%s: unable to load firmware data\n", + pci_name(priv->pdev)); + return rc; + } + + iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR); + msleep(1); + + loops = 200000; + do { + if (ioread32(priv->regs + MWL8K_HIU_INT_CODE) + == MWL8K_FWSTA_READY) + break; + udelay(1); + } while (--loops); + + return loops ? 0 : -ETIMEDOUT; +} + + +/* + * Defines shared between transmission and reception. + */ +/* HT control fields for firmware */ +struct ewc_ht_info { + __le16 control1; + __le16 control2; + __le16 control3; +} __attribute__((packed)); + +/* Firmware Station database operations */ +#define MWL8K_STA_DB_ADD_ENTRY 0 +#define MWL8K_STA_DB_MODIFY_ENTRY 1 +#define MWL8K_STA_DB_DEL_ENTRY 2 +#define MWL8K_STA_DB_FLUSH 3 + +/* Peer Entry flags - used to define the type of the peer node */ +#define MWL8K_PEER_TYPE_ACCESSPOINT 2 +#define MWL8K_PEER_TYPE_ADHOC_STATION 4 + +#define MWL8K_IEEE_LEGACY_DATA_RATES 12 +#define MWL8K_MCS_BITMAP_SIZE 16 +#define pad_size 16 + +struct peer_capability_info { + /* Peer type - AP vs. STA. */ + __u8 peer_type; + + /* Basic 802.11 capabilities from assoc resp. */ + __le16 basic_caps; + + /* Set if peer supports 802.11n high throughput (HT). */ + __u8 ht_support; + + /* Valid if HT is supported. */ + __le16 ht_caps; + __u8 extended_ht_caps; + struct ewc_ht_info ewc_info; + + /* Legacy rate table. Intersection of our rates and peer rates. */ + __u8 legacy_rates[MWL8K_IEEE_LEGACY_DATA_RATES]; + + /* HT rate table. Intersection of our rates and peer rates. */ + __u8 ht_rates[MWL8K_MCS_BITMAP_SIZE]; + __u8 pad[pad_size]; + + /* If set, interoperability mode, no proprietary extensions. */ + __u8 interop; + __u8 pad2; + __u8 station_id; + __le16 amsdu_enabled; +} __attribute__((packed)); + +/* Inline functions to manipulate QoS field in data descriptor. */ +static inline u16 mwl8k_qos_setbit_tid(u16 qos, u8 tid) +{ + u16 val_mask = 0x000f; + u16 qos_mask = ~val_mask; + + /* TID bits 0-3 */ + return (qos & qos_mask) | (tid & val_mask); +} + +static inline u16 mwl8k_qos_setbit_eosp(u16 qos) +{ + u16 val_mask = 1 << 4; + + /* End of Service Period Bit 4 */ + return qos | val_mask; +} + +static inline u16 mwl8k_qos_setbit_ack(u16 qos, u8 ack_policy) +{ + u16 val_mask = 0x3; + u8 shift = 5; + u16 qos_mask = ~(val_mask << shift); + + /* Ack Policy Bit 5-6 */ + return (qos & qos_mask) | ((ack_policy & val_mask) << shift); +} + +static inline u16 mwl8k_qos_setbit_amsdu(u16 qos) +{ + u16 val_mask = 1 << 7; + + /* AMSDU present Bit 7 */ + return qos | val_mask; +} + +static inline u16 mwl8k_qos_setbit_qlen(u16 qos, u8 len) +{ + u16 val_mask = 0xff; + u8 shift = 8; + u16 qos_mask = ~(val_mask << shift); + + /* Queue Length Bits 8-15 */ + return (qos & qos_mask) | ((len & val_mask) << shift); +} + +/* DMA header used by firmware and hardware. */ +struct mwl8k_dma_data { + __le16 fwlen; + struct ieee80211_hdr wh; +} __attribute__((packed)); + +/* Routines to add/remove DMA header from skb. */ +static inline int mwl8k_remove_dma_header(struct sk_buff *skb) +{ + struct mwl8k_dma_data *tr = (struct mwl8k_dma_data *)(skb->data); + void *dst, *src = &tr->wh; + __le16 fc = tr->wh.frame_control; + int hdrlen = ieee80211_hdrlen(fc); + u16 space = sizeof(struct mwl8k_dma_data) - hdrlen; + + dst = (void *)tr + space; + if (dst != src) { + memmove(dst, src, hdrlen); + skb_pull(skb, space); + } + + return 0; +} + +static inline struct sk_buff *mwl8k_add_dma_header(struct sk_buff *skb) +{ + struct ieee80211_hdr *wh; + u32 hdrlen, pktlen; + struct mwl8k_dma_data *tr; + + wh = (struct ieee80211_hdr *)skb->data; + hdrlen = ieee80211_hdrlen(wh->frame_control); + pktlen = skb->len; + + /* + * Copy up/down the 802.11 header; the firmware requires + * we present a 2-byte payload length followed by a + * 4-address header (w/o QoS), followed (optionally) by + * any WEP/ExtIV header (but only filled in for CCMP). + */ + if (hdrlen != sizeof(struct mwl8k_dma_data)) + skb_push(skb, sizeof(struct mwl8k_dma_data) - hdrlen); + + tr = (struct mwl8k_dma_data *)skb->data; + if (wh != &tr->wh) + memmove(&tr->wh, wh, hdrlen); + + /* Clear addr4 */ + memset(tr->wh.addr4, 0, IEEE80211_ADDR_LEN); + + /* + * Firmware length is the length of the fully formed "802.11 + * payload". That is, everything except for the 802.11 header. + * This includes all crypto material including the MIC. + */ + tr->fwlen = cpu_to_le16(pktlen - hdrlen); + + return skb; +} + + +/* + * Packet reception. + */ +#define MWL8K_RX_CTRL_KEY_INDEX_MASK 0x30 +#define MWL8K_RX_CTRL_OWNED_BY_HOST 0x02 +#define MWL8K_RX_CTRL_AMPDU 0x01 + +struct mwl8k_rx_desc { + __le16 pkt_len; + __u8 link_quality; + __u8 noise_level; + __le32 pkt_phys_addr; + __le32 next_rx_desc_phys_addr; + __le16 qos_control; + __le16 rate_info; + __le32 pad0[4]; + __u8 rssi; + __u8 channel; + __le16 pad1; + __u8 rx_ctrl; + __u8 rx_status; + __u8 pad2[2]; +} __attribute__((packed)); + +#define MWL8K_RX_DESCS 256 +#define MWL8K_RX_MAXSZ 3800 + +static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_rx_queue *rxq = priv->rxq + index; + int size; + int i; + + rxq->rx_desc_count = 0; + rxq->rx_head = 0; + rxq->rx_tail = 0; + + size = MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc); + + rxq->rx_desc_area = + pci_alloc_consistent(priv->pdev, size, &rxq->rx_desc_dma); + if (rxq->rx_desc_area == NULL) { + printk(KERN_ERR "%s: failed to alloc RX descriptors\n", + priv->name); + return -ENOMEM; + } + memset(rxq->rx_desc_area, 0, size); + + rxq->rx_skb = kmalloc(MWL8K_RX_DESCS * + sizeof(*rxq->rx_skb), GFP_KERNEL); + if (rxq->rx_skb == NULL) { + printk(KERN_ERR "%s: failed to alloc RX skbuff list\n", + priv->name); + pci_free_consistent(priv->pdev, size, + rxq->rx_desc_area, rxq->rx_desc_dma); + return -ENOMEM; + } + memset(rxq->rx_skb, 0, MWL8K_RX_DESCS * sizeof(*rxq->rx_skb)); + + for (i = 0; i < MWL8K_RX_DESCS; i++) { + struct mwl8k_rx_desc *rx_desc; + int nexti; + + rx_desc = rxq->rx_desc_area + i; + nexti = (i + 1) % MWL8K_RX_DESCS; + + rx_desc->next_rx_desc_phys_addr = + cpu_to_le32(rxq->rx_desc_dma + + nexti * sizeof(*rx_desc)); + rx_desc->rx_ctrl = + cpu_to_le32(MWL8K_RX_CTRL_OWNED_BY_HOST); + } + + return 0; +} + +static int rxq_refill(struct ieee80211_hw *hw, int index, int limit) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_rx_queue *rxq = priv->rxq + index; + int refilled; + + refilled = 0; + while (rxq->rx_desc_count < MWL8K_RX_DESCS && limit--) { + struct sk_buff *skb; + int rx; + + skb = dev_alloc_skb(MWL8K_RX_MAXSZ); + if (skb == NULL) + break; + + rxq->rx_desc_count++; + + rx = rxq->rx_tail; + rxq->rx_tail = (rx + 1) % MWL8K_RX_DESCS; + + rxq->rx_desc_area[rx].pkt_phys_addr = + cpu_to_le32(pci_map_single(priv->pdev, skb->data, + MWL8K_RX_MAXSZ, DMA_FROM_DEVICE)); + + rxq->rx_desc_area[rx].pkt_len = cpu_to_le16(MWL8K_RX_MAXSZ); + rxq->rx_skb[rx] = skb; + wmb(); + rxq->rx_desc_area[rx].rx_ctrl = 0; + + refilled++; + } + + return refilled; +} + +/* Must be called only when the card's reception is completely halted */ +static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_rx_queue *rxq = priv->rxq + index; + int i; + + for (i = 0; i < MWL8K_RX_DESCS; i++) { + if (rxq->rx_skb[i] != NULL) { + unsigned long addr; + + addr = le32_to_cpu(rxq->rx_desc_area[i].pkt_phys_addr); + pci_unmap_single(priv->pdev, addr, MWL8K_RX_MAXSZ, + PCI_DMA_FROMDEVICE); + kfree_skb(rxq->rx_skb[i]); + rxq->rx_skb[i] = NULL; + } + } + + kfree(rxq->rx_skb); + rxq->rx_skb = NULL; + + pci_free_consistent(priv->pdev, + MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc), + rxq->rx_desc_area, rxq->rx_desc_dma); + rxq->rx_desc_area = NULL; +} + + +/* + * Scan a list of BSSIDs to process for finalize join. + * Allows for extension to process multiple BSSIDs. + */ +static inline int +mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh) +{ + return priv->capture_beacon && + ieee80211_is_beacon(wh->frame_control) && + !compare_ether_addr(wh->addr3, priv->capture_bssid); +} + +static inline void mwl8k_save_beacon(struct mwl8k_priv *priv, + struct sk_buff *skb) +{ + priv->capture_beacon = false; + memset(priv->capture_bssid, 0, IEEE80211_ADDR_LEN); + + /* + * Use GFP_ATOMIC as rxq_process is called from + * the primary interrupt handler, memory allocation call + * must not sleep. + */ + priv->beacon_skb = skb_copy(skb, GFP_ATOMIC); + if (priv->beacon_skb != NULL) + queue_work(priv->config_wq, + &priv->finalize_join_worker); +} + +static int rxq_process(struct ieee80211_hw *hw, int index, int limit) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_rx_queue *rxq = priv->rxq + index; + int processed; + + processed = 0; + while (rxq->rx_desc_count && limit--) { + struct mwl8k_rx_desc *rx_desc; + struct sk_buff *skb; + struct ieee80211_rx_status status; + unsigned long addr; + struct ieee80211_hdr *wh; + + rx_desc = rxq->rx_desc_area + rxq->rx_head; + if (!(rx_desc->rx_ctrl & MWL8K_RX_CTRL_OWNED_BY_HOST)) + break; + rmb(); + + skb = rxq->rx_skb[rxq->rx_head]; + rxq->rx_skb[rxq->rx_head] = NULL; + + rxq->rx_head = (rxq->rx_head + 1) % MWL8K_RX_DESCS; + rxq->rx_desc_count--; + + addr = le32_to_cpu(rx_desc->pkt_phys_addr); + pci_unmap_single(priv->pdev, addr, + MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE); + + skb_put(skb, le16_to_cpu(rx_desc->pkt_len)); + if (mwl8k_remove_dma_header(skb)) { + dev_kfree_skb(skb); + continue; + } + + wh = (struct ieee80211_hdr *)skb->data; + + /* + * Check for pending join operation. save a copy of + * the beacon and schedule a tasklet to send finalize + * join command to the firmware. + */ + if (mwl8k_capture_bssid(priv, wh)) + mwl8k_save_beacon(priv, skb); + + memset(&status, 0, sizeof(status)); + status.mactime = 0; + status.signal = -rx_desc->rssi; + status.noise = -rx_desc->noise_level; + status.qual = rx_desc->link_quality; + status.antenna = 1; + status.rate_idx = 1; + status.flag = 0; + status.band = IEEE80211_BAND_2GHZ; + status.freq = ieee80211_channel_to_frequency(rx_desc->channel); + ieee80211_rx_irqsafe(hw, skb, &status); + + processed++; + } + + return processed; +} + + +/* + * Packet transmission. + */ + +/* Transmit queue assignment. */ +enum { + MWL8K_WME_AC_BK = 0, /* background access */ + MWL8K_WME_AC_BE = 1, /* best effort access */ + MWL8K_WME_AC_VI = 2, /* video access */ + MWL8K_WME_AC_VO = 3, /* voice access */ +}; + +/* Transmit packet ACK policy */ +#define MWL8K_TXD_ACK_POLICY_NORMAL 0 +#define MWL8K_TXD_ACK_POLICY_NONE 1 +#define MWL8K_TXD_ACK_POLICY_NO_EXPLICIT 2 +#define MWL8K_TXD_ACK_POLICY_BLOCKACK 3 + +#define GET_TXQ(_ac) (\ + ((_ac) == WME_AC_VO) ? MWL8K_WME_AC_VO : \ + ((_ac) == WME_AC_VI) ? MWL8K_WME_AC_VI : \ + ((_ac) == WME_AC_BK) ? MWL8K_WME_AC_BK : \ + MWL8K_WME_AC_BE) + +#define MWL8K_TXD_STATUS_IDLE 0x00000000 +#define MWL8K_TXD_STATUS_USED 0x00000001 +#define MWL8K_TXD_STATUS_OK 0x00000001 +#define MWL8K_TXD_STATUS_OK_RETRY 0x00000002 +#define MWL8K_TXD_STATUS_OK_MORE_RETRY 0x00000004 +#define MWL8K_TXD_STATUS_MULTICAST_TX 0x00000008 +#define MWL8K_TXD_STATUS_BROADCAST_TX 0x00000010 +#define MWL8K_TXD_STATUS_FAILED_LINK_ERROR 0x00000020 +#define MWL8K_TXD_STATUS_FAILED_EXCEED_LIMIT 0x00000040 +#define MWL8K_TXD_STATUS_FAILED_AGING 0x00000080 +#define MWL8K_TXD_STATUS_HOST_CMD 0x40000000 +#define MWL8K_TXD_STATUS_FW_OWNED 0x80000000 +#define MWL8K_TXD_SOFTSTALE 0x80 +#define MWL8K_TXD_SOFTSTALE_MGMT_RETRY 0x01 + +struct mwl8k_tx_desc { + __le32 status; + __u8 data_rate; + __u8 tx_priority; + __le16 qos_control; + __le32 pkt_phys_addr; + __le16 pkt_len; + __u8 dest_MAC_addr[IEEE80211_ADDR_LEN]; + __le32 next_tx_desc_phys_addr; + __le32 reserved; + __le16 rate_info; + __u8 peer_id; + __u8 tx_frag_cnt; +} __attribute__((packed)); + +#define MWL8K_TX_DESCS 128 + +static int mwl8k_txq_init(struct ieee80211_hw *hw, int index) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_tx_queue *txq = priv->txq + index; + int size; + int i; + + memset(&txq->tx_stats, 0, + sizeof(struct ieee80211_tx_queue_stats)); + txq->tx_stats.limit = MWL8K_TX_DESCS; + txq->tx_head = 0; + txq->tx_tail = 0; + + size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc); + + txq->tx_desc_area = + pci_alloc_consistent(priv->pdev, size, &txq->tx_desc_dma); + if (txq->tx_desc_area == NULL) { + printk(KERN_ERR "%s: failed to alloc TX descriptors\n", + priv->name); + return -ENOMEM; + } + memset(txq->tx_desc_area, 0, size); + + txq->tx_skb = kmalloc(MWL8K_TX_DESCS * sizeof(*txq->tx_skb), + GFP_KERNEL); + if (txq->tx_skb == NULL) { + printk(KERN_ERR "%s: failed to alloc TX skbuff list\n", + priv->name); + pci_free_consistent(priv->pdev, size, + txq->tx_desc_area, txq->tx_desc_dma); + return -ENOMEM; + } + memset(txq->tx_skb, 0, MWL8K_TX_DESCS * sizeof(*txq->tx_skb)); + + for (i = 0; i < MWL8K_TX_DESCS; i++) { + struct mwl8k_tx_desc *tx_desc; + int nexti; + + tx_desc = txq->tx_desc_area + i; + nexti = (i + 1) % MWL8K_TX_DESCS; + + tx_desc->status = 0; + tx_desc->next_tx_desc_phys_addr = + cpu_to_le32(txq->tx_desc_dma + + nexti * sizeof(*tx_desc)); + } + + return 0; +} + +static inline void mwl8k_tx_start(struct mwl8k_priv *priv) +{ + iowrite32(MWL8K_H2A_INT_PPA_READY, + priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + iowrite32(MWL8K_H2A_INT_DUMMY, + priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + ioread32(priv->regs + MWL8K_HIU_INT_CODE); +} + +static inline int mwl8k_txq_busy(struct mwl8k_priv *priv) +{ + return priv->pending_tx_pkts; +} + +struct mwl8k_txq_info { + u32 fw_owned; + u32 drv_owned; + u32 unused; + u32 len; + u32 head; + u32 tail; +}; + +static int mwl8k_scan_tx_ring(struct mwl8k_priv *priv, + struct mwl8k_txq_info txinfo[], + u32 num_queues) +{ + int count, desc, status; + struct mwl8k_tx_queue *txq; + struct mwl8k_tx_desc *tx_desc; + int ndescs = 0; + + memset(txinfo, 0, num_queues * sizeof(struct mwl8k_txq_info)); + spin_lock_bh(&priv->tx_lock); + for (count = 0; count < num_queues; count++) { + txq = priv->txq + count; + txinfo[count].len = txq->tx_stats.len; + txinfo[count].head = txq->tx_head; + txinfo[count].tail = txq->tx_tail; + for (desc = 0; desc < MWL8K_TX_DESCS; desc++) { + tx_desc = txq->tx_desc_area + desc; + status = le32_to_cpu(tx_desc->status); + + if (status & MWL8K_TXD_STATUS_FW_OWNED) + txinfo[count].fw_owned++; + else + txinfo[count].drv_owned++; + + if (tx_desc->pkt_len == 0) + txinfo[count].unused++; + } + } + spin_unlock_bh(&priv->tx_lock); + + return ndescs; +} + +static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw, u32 delay_ms) +{ + u32 count = 0; + unsigned long timeout = 0; + struct mwl8k_priv *priv = hw->priv; + DECLARE_COMPLETION_ONSTACK(cmd_wait); + + might_sleep(); + + if (priv->tx_wait != NULL) + printk(KERN_ERR "WARNING Previous TXWaitEmpty instance\n"); + + spin_lock_bh(&priv->tx_lock); + count = mwl8k_txq_busy(priv); + if (count) { + priv->tx_wait = &cmd_wait; + if (priv->radio_state) + mwl8k_tx_start(priv); + } + spin_unlock_bh(&priv->tx_lock); + + if (count) { + struct mwl8k_txq_info txinfo[4]; + int index; + int newcount; + + timeout = wait_for_completion_timeout(&cmd_wait, + msecs_to_jiffies(delay_ms)); + if (timeout) + return 0; + + spin_lock_bh(&priv->tx_lock); + priv->tx_wait = NULL; + newcount = mwl8k_txq_busy(priv); + spin_unlock_bh(&priv->tx_lock); + + printk(KERN_ERR "%s(%u) TIMEDOUT:%ums Pend:%u-->%u\n", + __func__, __LINE__, delay_ms, count, newcount); + + mwl8k_scan_tx_ring(priv, txinfo, 4); + for (index = 0 ; index < 4; index++) + printk(KERN_ERR + "TXQ:%u L:%u H:%u T:%u FW:%u DRV:%u U:%u\n", + index, + txinfo[index].len, + txinfo[index].head, + txinfo[index].tail, + txinfo[index].fw_owned, + txinfo[index].drv_owned, + txinfo[index].unused); + return -ETIMEDOUT; + } + + return 0; +} + +#define MWL8K_TXD_OK (MWL8K_TXD_STATUS_OK | \ + MWL8K_TXD_STATUS_OK_RETRY | \ + MWL8K_TXD_STATUS_OK_MORE_RETRY) +#define MWL8K_TXD_SUCCESS(stat) ((stat) & MWL8K_TXD_OK) +#define MWL8K_TXD_FAIL_RETRY(stat) \ + ((stat) & (MWL8K_TXD_STATUS_FAILED_EXCEED_LIMIT)) + +static void mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int force) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_tx_queue *txq = priv->txq + index; + int wake = 0; + + while (txq->tx_stats.len > 0) { + int tx; + int rc; + struct mwl8k_tx_desc *tx_desc; + unsigned long addr; + size_t size; + struct sk_buff *skb; + struct ieee80211_tx_info *info; + u32 status; + + rc = 0; + tx = txq->tx_head; + tx_desc = txq->tx_desc_area + tx; + + status = le32_to_cpu(tx_desc->status); + + if (status & MWL8K_TXD_STATUS_FW_OWNED) { + if (!force) + break; + tx_desc->status &= + ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED); + } + + txq->tx_head = (tx + 1) % MWL8K_TX_DESCS; + BUG_ON(txq->tx_stats.len == 0); + txq->tx_stats.len--; + priv->pending_tx_pkts--; + + addr = le32_to_cpu(tx_desc->pkt_phys_addr); + size = (u32)(le16_to_cpu(tx_desc->pkt_len)); + skb = txq->tx_skb[tx].skb; + txq->tx_skb[tx].skb = NULL; + + BUG_ON(skb == NULL); + pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE); + + rc = mwl8k_remove_dma_header(skb); + + /* Mark descriptor as unused */ + tx_desc->pkt_phys_addr = 0; + tx_desc->pkt_len = 0; + + if (txq->tx_skb[tx].clone) { + /* Replace with original skb + * before returning to stack + * as buffer has been cloned + */ + dev_kfree_skb(skb); + skb = txq->tx_skb[tx].clone; + txq->tx_skb[tx].clone = NULL; + } + + if (rc) { + /* Something has gone wrong here. + * Failed to remove DMA header. + * Print error message and drop packet. + */ + printk(KERN_ERR "%s: Error removing DMA header from " + "tx skb 0x%p.\n", priv->name, skb); + + dev_kfree_skb(skb); + continue; + } + + info = IEEE80211_SKB_CB(skb); + ieee80211_tx_info_clear_status(info); + + /* Convert firmware status stuff into tx_status */ + if (MWL8K_TXD_SUCCESS(status)) { + /* Transmit OK */ + info->flags |= IEEE80211_TX_STAT_ACK; + } + + ieee80211_tx_status_irqsafe(hw, skb); + + wake = !priv->inconfig && priv->radio_state; + } + + if (wake) + ieee80211_wake_queue(hw, index); +} + +/* must be called only when the card's transmit is completely halted */ +static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_tx_queue *txq = priv->txq + index; + + mwl8k_txq_reclaim(hw, index, 1); + + kfree(txq->tx_skb); + txq->tx_skb = NULL; + + pci_free_consistent(priv->pdev, + MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc), + txq->tx_desc_area, txq->tx_desc_dma); + txq->tx_desc_area = NULL; +} + +static int +mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb) +{ + struct mwl8k_priv *priv = hw->priv; + struct ieee80211_tx_info *tx_info; + struct ieee80211_hdr *wh; + struct mwl8k_tx_queue *txq; + struct mwl8k_tx_desc *tx; + struct mwl8k_dma_data *tr; + struct mwl8k_vif *mwl8k_vif; + struct sk_buff *org_skb = skb; + dma_addr_t dma; + u16 qos = 0; + bool qosframe = false, ampduframe = false; + bool mcframe = false, eapolframe = false; + bool amsduframe = false; + __le16 fc; + + txq = priv->txq + index; + tx = txq->tx_desc_area + txq->tx_tail; + + BUG_ON(txq->tx_skb[txq->tx_tail].skb != NULL); + + /* + * Append HW DMA header to start of packet. Drop packet if + * there is not enough space or a failure to unshare/unclone + * the skb. + */ + skb = mwl8k_add_dma_header(skb); + + if (skb == NULL) { + printk(KERN_DEBUG "%s: failed to prepend HW DMA " + "header, dropping TX frame.\n", priv->name); + dev_kfree_skb(org_skb); + return NETDEV_TX_OK; + } + + tx_info = IEEE80211_SKB_CB(skb); + mwl8k_vif = MWL8K_VIF(tx_info->control.vif); + tr = (struct mwl8k_dma_data *)skb->data; + wh = &tr->wh; + fc = wh->frame_control; + qosframe = ieee80211_is_data_qos(fc); + mcframe = is_multicast_ether_addr(wh->addr1); + ampduframe = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU); + + if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { + u16 seqno = mwl8k_vif->seqno; + wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); + wh->seq_ctrl |= cpu_to_le16(seqno << 4); + mwl8k_vif->seqno = seqno++ % 4096; + } + + if (qosframe) + qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh))); + + dma = pci_map_single(priv->pdev, skb->data, + skb->len, PCI_DMA_TODEVICE); + + if (pci_dma_mapping_error(priv->pdev, dma)) { + printk(KERN_DEBUG "%s: failed to dma map skb, " + "dropping TX frame.\n", priv->name); + + if (org_skb != NULL) + dev_kfree_skb(org_skb); + if (skb != NULL) + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + /* Set desc header, cpu bit order. */ + tx->status = 0; + tx->data_rate = 0; + tx->tx_priority = index; + tx->qos_control = 0; + tx->rate_info = 0; + tx->peer_id = mwl8k_vif->peer_id; + + amsduframe = !!(qos & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT); + + /* Setup firmware control bit fields for each frame type. */ + if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)) { + tx->data_rate = 0; + qos = mwl8k_qos_setbit_eosp(qos); + /* Set Queue size to unspecified */ + qos = mwl8k_qos_setbit_qlen(qos, 0xff); + } else if (ieee80211_is_data(fc)) { + tx->data_rate = 1; + if (mcframe) + tx->status |= MWL8K_TXD_STATUS_MULTICAST_TX; + + /* + * Tell firmware to not send EAPOL pkts in an + * aggregate. Verify against mac80211 tx path. If + * stack turns off AMPDU for an EAPOL frame this + * check will be removed. + */ + if (eapolframe) { + qos = mwl8k_qos_setbit_ack(qos, + MWL8K_TXD_ACK_POLICY_NORMAL); + } else { + /* Send pkt in an aggregate if AMPDU frame. */ + if (ampduframe) + qos = mwl8k_qos_setbit_ack(qos, + MWL8K_TXD_ACK_POLICY_BLOCKACK); + else + qos = mwl8k_qos_setbit_ack(qos, + MWL8K_TXD_ACK_POLICY_NORMAL); + + if (amsduframe) + qos = mwl8k_qos_setbit_amsdu(qos); + } + } + + /* Convert to little endian */ + tx->qos_control = cpu_to_le16(qos); + tx->status = cpu_to_le32(tx->status); + tx->pkt_phys_addr = cpu_to_le32(dma); + tx->pkt_len = cpu_to_le16(skb->len); + + txq->tx_skb[txq->tx_tail].skb = skb; + txq->tx_skb[txq->tx_tail].clone = + skb == org_skb ? NULL : org_skb; + + spin_lock_bh(&priv->tx_lock); + + tx->status = cpu_to_le32(MWL8K_TXD_STATUS_OK | + MWL8K_TXD_STATUS_FW_OWNED); + wmb(); + txq->tx_stats.len++; + priv->pending_tx_pkts++; + txq->tx_stats.count++; + txq->tx_tail++; + + if (txq->tx_tail == MWL8K_TX_DESCS) + txq->tx_tail = 0; + if (txq->tx_head == txq->tx_tail) + ieee80211_stop_queue(hw, index); + + if (priv->inconfig) { + /* + * Silently queue packet when we are in the middle of + * a config cycle. Notify firmware only if we are + * waiting for TXQs to empty. If a packet is sent + * before .config() is complete, perhaps it is better + * to drop the packet, as the channel is being changed + * and the packet will end up on the wrong channel. + */ + printk(KERN_ERR "%s(): WARNING TX activity while " + "in config\n", __func__); + + if (priv->tx_wait != NULL) + mwl8k_tx_start(priv); + } else + mwl8k_tx_start(priv); + + spin_unlock_bh(&priv->tx_lock); + + return NETDEV_TX_OK; +} + + +/* + * Command processing. + */ + +/* Timeout firmware commands after 2000ms */ +#define MWL8K_CMD_TIMEOUT_MS 2000 + +static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd) +{ + DECLARE_COMPLETION_ONSTACK(cmd_wait); + struct mwl8k_priv *priv = hw->priv; + void __iomem *regs = priv->regs; + dma_addr_t dma_addr; + unsigned int dma_size; + int rc; + u16 __iomem *result; + unsigned long timeout = 0; + u8 buf[32]; + + cmd->result = 0xFFFF; + dma_size = le16_to_cpu(cmd->length); + dma_addr = pci_map_single(priv->pdev, cmd, dma_size, + PCI_DMA_BIDIRECTIONAL); + if (pci_dma_mapping_error(priv->pdev, dma_addr)) + return -ENOMEM; + + if (priv->hostcmd_wait != NULL) + printk(KERN_ERR "WARNING host command in progress\n"); + + spin_lock_irq(&priv->fw_lock); + priv->hostcmd_wait = &cmd_wait; + iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR); + iowrite32(MWL8K_H2A_INT_DOORBELL, + regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + iowrite32(MWL8K_H2A_INT_DUMMY, + regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); + spin_unlock_irq(&priv->fw_lock); + + timeout = wait_for_completion_timeout(&cmd_wait, + msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS)); + + result = &cmd->result; + if (!timeout) { + spin_lock_irq(&priv->fw_lock); + priv->hostcmd_wait = NULL; + spin_unlock_irq(&priv->fw_lock); + printk(KERN_ERR "%s: Command %s timeout after %u ms\n", + priv->name, + mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), + MWL8K_CMD_TIMEOUT_MS); + rc = -ETIMEDOUT; + } else { + rc = *result ? -EINVAL : 0; + if (rc) + printk(KERN_ERR "%s: Command %s error 0x%x\n", + priv->name, + mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), + *result); + } + + pci_unmap_single(priv->pdev, dma_addr, dma_size, + PCI_DMA_BIDIRECTIONAL); + return rc; +} + +/* + * GET_HW_SPEC. + */ +struct mwl8k_cmd_get_hw_spec { + struct mwl8k_cmd_pkt header; + __u8 hw_rev; + __u8 host_interface; + __le16 num_mcaddrs; + __u8 perm_addr[IEEE80211_ADDR_LEN]; + __le16 region_code; + __le32 fw_rev; + __le32 ps_cookie; + __le32 caps; + __u8 mcs_bitmap[16]; + __le32 rx_queue_ptr; + __le32 num_tx_queues; + __le32 tx_queue_ptrs[MWL8K_TX_QUEUES]; + __le32 caps2; + __le32 num_tx_desc_per_queue; + __le32 total_rx_desc; +} __attribute__((packed)); + +static int mwl8k_cmd_get_hw_spec(struct ieee80211_hw *hw) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_get_hw_spec *cmd; + int rc; + int i; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr)); + cmd->ps_cookie = cpu_to_le32(priv->cookie_dma); + cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rx_desc_dma); + cmd->num_tx_queues = MWL8K_TX_QUEUES; + for (i = 0; i < MWL8K_TX_QUEUES; i++) + cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].tx_desc_dma); + cmd->num_tx_desc_per_queue = MWL8K_TX_DESCS; + cmd->total_rx_desc = MWL8K_RX_DESCS; + + rc = mwl8k_post_cmd(hw, &cmd->header); + + if (!rc) { + SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr); + priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs); + priv->fw_rev = cmd->fw_rev; + priv->hw_rev = cmd->hw_rev; + priv->region_code = le16_to_cpu(cmd->region_code); + } + + kfree(cmd); + return rc; +} + +/* + * CMD_MAC_MULTICAST_ADR. + */ +struct mwl8k_cmd_mac_multicast_adr { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 numaddr; + __u8 addr[1][IEEE80211_ADDR_LEN]; +}; + +#define MWL8K_ENABLE_RX_MULTICAST 0x000F +static int mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, + int mc_count, + struct dev_addr_list *mclist) +{ + struct mwl8k_cmd_mac_multicast_adr *cmd; + int index = 0; + int rc; + int size = sizeof(*cmd) + ((mc_count - 1) * IEEE80211_ADDR_LEN); + cmd = kzalloc(size, GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR); + cmd->header.length = cpu_to_le16(size); + cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST); + cmd->numaddr = cpu_to_le16(mc_count); + while ((index < mc_count) && mclist) { + if (mclist->da_addrlen != IEEE80211_ADDR_LEN) { + rc = -EINVAL; + goto mwl8k_cmd_mac_multicast_adr_exit; + } + memcpy(cmd->addr[index], mclist->da_addr, IEEE80211_ADDR_LEN); + index++; + mclist = mclist->next; + } + + rc = mwl8k_post_cmd(hw, &cmd->header); + +mwl8k_cmd_mac_multicast_adr_exit: + kfree(cmd); + return rc; +} + +/* + * CMD_802_11_GET_STAT. + */ +struct mwl8k_cmd_802_11_get_stat { + struct mwl8k_cmd_pkt header; + __le16 action; + __le32 stats[64]; +} __attribute__((packed)); + +#define MWL8K_STAT_ACK_FAILURE 9 +#define MWL8K_STAT_RTS_FAILURE 12 +#define MWL8K_STAT_FCS_ERROR 24 +#define MWL8K_STAT_RTS_SUCCESS 11 + +static int mwl8k_cmd_802_11_get_stat(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats) +{ + struct mwl8k_cmd_802_11_get_stat *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_GET); + + rc = mwl8k_post_cmd(hw, &cmd->header); + if (!rc) { + stats->dot11ACKFailureCount = + le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]); + stats->dot11RTSFailureCount = + le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]); + stats->dot11FCSErrorCount = + le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]); + stats->dot11RTSSuccessCount = + le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]); + } + kfree(cmd); + + return rc; +} + +/* + * CMD_802_11_RADIO_CONTROL. + */ +struct mwl8k_cmd_802_11_radio_control { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 control; + __le16 radio_on; +} __attribute__((packed)); + +static int mwl8k_cmd_802_11_radio_control(struct ieee80211_hw *hw, int enable) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_802_11_radio_control *cmd; + int rc; + + if (((enable & MWL8K_RADIO_ENABLE) == priv->radio_state) && + !(enable & MWL8K_RADIO_FORCE)) + return 0; + + enable &= MWL8K_RADIO_ENABLE; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->control = cpu_to_le16(priv->radio_preamble); + cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + if (!rc) + priv->radio_state = enable; + + return rc; +} + +static int +mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble) +{ + struct mwl8k_priv *priv; + + if (hw == NULL || hw->priv == NULL) + return -EINVAL; + priv = hw->priv; + + priv->radio_preamble = (short_preamble ? + MWL8K_RADIO_SHORT_PREAMBLE : + MWL8K_RADIO_LONG_PREAMBLE); + + return mwl8k_cmd_802_11_radio_control(hw, + MWL8K_RADIO_ENABLE | MWL8K_RADIO_FORCE); +} + +/* + * CMD_802_11_RF_TX_POWER. + */ +#define MWL8K_TX_POWER_LEVEL_TOTAL 8 + +struct mwl8k_cmd_802_11_rf_tx_power { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 support_level; + __le16 current_level; + __le16 reserved; + __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL]; +} __attribute__((packed)); + +static int mwl8k_cmd_802_11_rf_tx_power(struct ieee80211_hw *hw, int dBm) +{ + struct mwl8k_cmd_802_11_rf_tx_power *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->support_level = cpu_to_le16(dBm); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_PRE_SCAN. + */ +struct mwl8k_cmd_set_pre_scan { + struct mwl8k_cmd_pkt header; +} __attribute__((packed)); + +static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw) +{ + struct mwl8k_cmd_set_pre_scan *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_POST_SCAN. + */ +struct mwl8k_cmd_set_post_scan { + struct mwl8k_cmd_pkt header; + __le32 isibss; + __u8 bssid[IEEE80211_ADDR_LEN]; +} __attribute__((packed)); + +static int +mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, __u8 mac[IEEE80211_ADDR_LEN]) +{ + struct mwl8k_cmd_set_post_scan *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->isibss = 0; + memcpy(cmd->bssid, mac, IEEE80211_ADDR_LEN); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_RF_CHANNEL. + */ +struct mwl8k_cmd_set_rf_channel { + struct mwl8k_cmd_pkt header; + __le16 action; + __u8 current_channel; + __le32 channel_flags; +} __attribute__((packed)); + +static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw, + struct ieee80211_channel *channel) +{ + struct mwl8k_cmd_set_rf_channel *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->current_channel = channel->hw_value; + if (channel->band == IEEE80211_BAND_2GHZ) + cmd->channel_flags = cpu_to_le32(0x00000081); + else + cmd->channel_flags = cpu_to_le32(0x00000000); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_SLOT. + */ +struct mwl8k_cmd_set_slot { + struct mwl8k_cmd_pkt header; + __le16 action; + __u8 short_slot; +} __attribute__((packed)); + +static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, int slot_time) +{ + struct mwl8k_cmd_set_slot *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->short_slot = slot_time == MWL8K_SHORT_SLOTTIME ? 1 : 0; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_MIMO_CONFIG. + */ +struct mwl8k_cmd_mimo_config { + struct mwl8k_cmd_pkt header; + __le32 action; + __u8 rx_antenna_map; + __u8 tx_antenna_map; +} __attribute__((packed)); + +static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx) +{ + struct mwl8k_cmd_mimo_config *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET); + cmd->rx_antenna_map = rx; + cmd->tx_antenna_map = tx; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_ENABLE_SNIFFER. + */ +struct mwl8k_cmd_enable_sniffer { + struct mwl8k_cmd_pkt header; + __le32 action; +} __attribute__((packed)); + +static int mwl8k_enable_sniffer(struct ieee80211_hw *hw, bool enable) +{ + struct mwl8k_cmd_enable_sniffer *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = enable ? cpu_to_le32((u32)MWL8K_CMD_SET) : 0; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_RATE_ADAPT_MODE. + */ +struct mwl8k_cmd_set_rate_adapt_mode { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 mode; +} __attribute__((packed)); + +static int mwl8k_cmd_setrateadaptmode(struct ieee80211_hw *hw, __u16 mode) +{ + struct mwl8k_cmd_set_rate_adapt_mode *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(MWL8K_CMD_SET); + cmd->mode = cpu_to_le16(mode); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_WMM_MODE. + */ +struct mwl8k_cmd_set_wmm { + struct mwl8k_cmd_pkt header; + __le16 action; +} __attribute__((packed)); + +static int mwl8k_set_wmm(struct ieee80211_hw *hw, bool enable) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_cmd_set_wmm *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = enable ? cpu_to_le16(MWL8K_CMD_SET) : 0; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + if (!rc) + priv->wmm_mode = enable; + + return rc; +} + +/* + * CMD_SET_RTS_THRESHOLD. + */ +struct mwl8k_cmd_rts_threshold { + struct mwl8k_cmd_pkt header; + __le16 action; + __le16 threshold; +} __attribute__((packed)); + +static int mwl8k_rts_threshold(struct ieee80211_hw *hw, + u16 action, u16 *threshold) +{ + struct mwl8k_cmd_rts_threshold *cmd; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->action = cpu_to_le16(action); + cmd->threshold = cpu_to_le16(*threshold); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_EDCA_PARAMS. + */ +struct mwl8k_cmd_set_edca_params { + struct mwl8k_cmd_pkt header; + + /* See MWL8K_SET_EDCA_XXX below */ + __le16 action; + + /* TX opportunity in units of 32 us */ + __le16 txop; + + /* Log exponent of max contention period: 0...15*/ + __u8 log_cw_max; + + /* Log exponent of min contention period: 0...15 */ + __u8 log_cw_min; + + /* Adaptive interframe spacing in units of 32us */ + __u8 aifs; + + /* TX queue to configure */ + __u8 txq; +} __attribute__((packed)); + +#define MWL8K_GET_EDCA_ALL 0 +#define MWL8K_SET_EDCA_CW 0x01 +#define MWL8K_SET_EDCA_TXOP 0x02 +#define MWL8K_SET_EDCA_AIFS 0x04 + +#define MWL8K_SET_EDCA_ALL (MWL8K_SET_EDCA_CW | \ + MWL8K_SET_EDCA_TXOP | \ + MWL8K_SET_EDCA_AIFS) + +static int +mwl8k_set_edca_params(struct ieee80211_hw *hw, __u8 qnum, + __u16 cw_min, __u16 cw_max, + __u8 aifs, __u16 txop) +{ + struct mwl8k_cmd_set_edca_params *cmd; + u32 log_cw_min, log_cw_max; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + log_cw_min = ilog2(cw_min+1); + log_cw_max = ilog2(cw_max+1); + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL); + cmd->txop = cpu_to_le16(txop); + cmd->log_cw_max = (u8)log_cw_max; + cmd->log_cw_min = (u8)log_cw_min; + cmd->aifs = aifs; + cmd->txq = qnum; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_FINALIZE_JOIN. + */ + +/* FJ beacon buffer size is compiled into the firmware. */ +#define MWL8K_FJ_BEACON_MAXLEN 128 + +struct mwl8k_cmd_finalize_join { + struct mwl8k_cmd_pkt header; + __le32 sleep_interval; /* Number of beacon periods to sleep */ + __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN]; +} __attribute__((packed)); + +static int mwl8k_finalize_join(struct ieee80211_hw *hw, void *frame, + __u16 framelen, __u16 dtim) +{ + struct mwl8k_cmd_finalize_join *cmd; + struct ieee80211_mgmt *payload = frame; + u16 hdrlen; + u32 payload_len; + int rc; + + if (frame == NULL) + return -EINVAL; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + if (dtim) + cmd->sleep_interval = cpu_to_le32(dtim); + else + cmd->sleep_interval = cpu_to_le32(1); + + hdrlen = ieee80211_hdrlen(payload->frame_control); + + payload_len = framelen > hdrlen ? framelen - hdrlen : 0; + + /* XXX TBD Might just have to abort and return an error */ + if (payload_len > MWL8K_FJ_BEACON_MAXLEN) + printk(KERN_ERR "%s(): WARNING: Incomplete beacon " + "sent to firmware. Sz=%u MAX=%u\n", __func__, + payload_len, MWL8K_FJ_BEACON_MAXLEN); + + payload_len = payload_len > MWL8K_FJ_BEACON_MAXLEN ? + MWL8K_FJ_BEACON_MAXLEN : payload_len; + + if (payload && payload_len) + memcpy(cmd->beacon_data, &payload->u.beacon, payload_len); + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + return rc; +} + +/* + * CMD_UPDATE_STADB. + */ +struct mwl8k_cmd_update_sta_db { + struct mwl8k_cmd_pkt header; + + /* See STADB_ACTION_TYPE */ + __le32 action; + + /* Peer MAC address */ + __u8 peer_addr[IEEE80211_ADDR_LEN]; + + __le32 reserved; + + /* Peer info - valid during add/update. */ + struct peer_capability_info peer_info; +} __attribute__((packed)); + +static int mwl8k_cmd_update_sta_db(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, __u32 action) +{ + struct mwl8k_vif *mv_vif = MWL8K_VIF(vif); + struct ieee80211_bss_conf *info = &mv_vif->bss_info; + struct mwl8k_cmd_update_sta_db *cmd; + struct peer_capability_info *peer_info; + struct ieee80211_rate *bitrates = mv_vif->legacy_rates; + DECLARE_MAC_BUF(mac); + int rc; + __u8 count, *rates; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + cmd->action = cpu_to_le32(action); + peer_info = &cmd->peer_info; + memcpy(cmd->peer_addr, mv_vif->bssid, IEEE80211_ADDR_LEN); + + switch (action) { + case MWL8K_STA_DB_ADD_ENTRY: + case MWL8K_STA_DB_MODIFY_ENTRY: + /* Build peer_info block */ + peer_info->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT; + peer_info->basic_caps = cpu_to_le16(info->assoc_capability); + peer_info->interop = 1; + peer_info->amsdu_enabled = 0; + + rates = peer_info->legacy_rates; + for (count = 0 ; count < mv_vif->legacy_nrates; count++) + rates[count] = bitrates[count].hw_value; + + rc = mwl8k_post_cmd(hw, &cmd->header); + if (rc == 0) + mv_vif->peer_id = peer_info->station_id; + + break; + + case MWL8K_STA_DB_DEL_ENTRY: + case MWL8K_STA_DB_FLUSH: + default: + rc = mwl8k_post_cmd(hw, &cmd->header); + if (rc == 0) + mv_vif->peer_id = 0; + break; + } + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_AID. + */ +#define IEEE80211_OPMODE_DISABLED 0x00 +#define IEEE80211_OPMODE_NON_MEMBER_PROT_MODE 0x01 +#define IEEE80211_OPMODE_ONE_20MHZ_STA_PROT_MODE 0x02 +#define IEEE80211_OPMODE_HTMIXED_PROT_MODE 0x03 + +#define MWL8K_RATE_INDEX_MAX_ARRAY 14 + +#define MWL8K_FRAME_PROT_DISABLED 0x00 +#define MWL8K_FRAME_PROT_11G 0x07 +#define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY 0x02 +#define MWL8K_FRAME_PROT_11N_HT_ALL 0x06 +#define MWL8K_FRAME_PROT_MASK 0x07 + +struct mwl8k_cmd_update_set_aid { + struct mwl8k_cmd_pkt header; + __le16 aid; + + /* AP's MAC address (BSSID) */ + __u8 bssid[IEEE80211_ADDR_LEN]; + __le16 protection_mode; + __u8 supp_rates[MWL8K_RATE_INDEX_MAX_ARRAY]; +} __attribute__((packed)); + +static int mwl8k_cmd_set_aid(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct mwl8k_vif *mv_vif = MWL8K_VIF(vif); + struct ieee80211_bss_conf *info = &mv_vif->bss_info; + struct mwl8k_cmd_update_set_aid *cmd; + struct ieee80211_rate *bitrates = mv_vif->legacy_rates; + int count; + u16 prot_mode; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + cmd->aid = cpu_to_le16(info->aid); + + memcpy(cmd->bssid, mv_vif->bssid, IEEE80211_ADDR_LEN); + + prot_mode = MWL8K_FRAME_PROT_DISABLED; + + if (info->use_cts_prot) { + prot_mode = MWL8K_FRAME_PROT_11G; + } else { + switch (info->ht.operation_mode & + IEEE80211_HT_OP_MODE_PROTECTION) { + case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: + prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY; + break; + case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: + prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL; + break; + default: + prot_mode = MWL8K_FRAME_PROT_DISABLED; + break; + } + } + + cmd->protection_mode = cpu_to_le16(prot_mode); + + for (count = 0; count < mv_vif->legacy_nrates; count++) + cmd->supp_rates[count] = bitrates[count].hw_value; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_SET_RATE. + */ +struct mwl8k_cmd_update_rateset { + struct mwl8k_cmd_pkt header; + __u8 legacy_rates[MWL8K_RATE_INDEX_MAX_ARRAY]; + + /* Bitmap for supported MCS codes. */ + __u8 mcs_set[MWL8K_IEEE_LEGACY_DATA_RATES]; + __u8 reserved[MWL8K_IEEE_LEGACY_DATA_RATES]; +} __attribute__((packed)); + +static int mwl8k_update_rateset(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct mwl8k_vif *mv_vif = MWL8K_VIF(vif); + struct mwl8k_cmd_update_rateset *cmd; + struct ieee80211_rate *bitrates = mv_vif->legacy_rates; + int count; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + for (count = 0; count < mv_vif->legacy_nrates; count++) + cmd->legacy_rates[count] = bitrates[count].hw_value; + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + +/* + * CMD_USE_FIXED_RATE. + */ +#define MWL8K_RATE_TABLE_SIZE 8 +#define MWL8K_UCAST_RATE 0 +#define MWL8K_MCAST_RATE 1 +#define MWL8K_BCAST_RATE 2 + +#define MWL8K_USE_FIXED_RATE 0x0001 +#define MWL8K_USE_AUTO_RATE 0x0002 + +struct mwl8k_rate_entry { + /* Set to 1 if HT rate, 0 if legacy. */ + __le32 is_ht_rate; + + /* Set to 1 to use retry_count field. */ + __le32 enable_retry; + + /* Specified legacy rate or MCS. */ + __le32 rate; + + /* Number of allowed retries. */ + __le32 retry_count; +} __attribute__((packed)); + +struct mwl8k_rate_table { + /* 1 to allow specified rate and below */ + __le32 allow_rate_drop; + __le32 num_rates; + struct mwl8k_rate_entry rate_entry[MWL8K_RATE_TABLE_SIZE]; +} __attribute__((packed)); + +struct mwl8k_cmd_use_fixed_rate { + struct mwl8k_cmd_pkt header; + __le32 action; + struct mwl8k_rate_table rate_table; + + /* Unicast, Broadcast or Multicast */ + __le32 rate_type; + __le32 reserved1; + __le32 reserved2; +} __attribute__((packed)); + +static int mwl8k_cmd_use_fixed_rate(struct ieee80211_hw *hw, + u32 action, u32 rate_type, struct mwl8k_rate_table *rate_table) +{ + struct mwl8k_cmd_use_fixed_rate *cmd; + int count; + int rc; + + cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); + if (cmd == NULL) + return -ENOMEM; + + cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE); + cmd->header.length = cpu_to_le16(sizeof(*cmd)); + + cmd->action = cpu_to_le32(action); + cmd->rate_type = cpu_to_le32(rate_type); + + if (rate_table != NULL) { + /* Copy over each field manually so + * that bitflipping can be done + */ + cmd->rate_table.allow_rate_drop = + cpu_to_le32(rate_table->allow_rate_drop); + cmd->rate_table.num_rates = + cpu_to_le32(rate_table->num_rates); + + for (count = 0; count < rate_table->num_rates; count++) { + struct mwl8k_rate_entry *dst = + &cmd->rate_table.rate_entry[count]; + struct mwl8k_rate_entry *src = + &rate_table->rate_entry[count]; + + dst->is_ht_rate = cpu_to_le32(src->is_ht_rate); + dst->enable_retry = cpu_to_le32(src->enable_retry); + dst->rate = cpu_to_le32(src->rate); + dst->retry_count = cpu_to_le32(src->retry_count); + } + } + + rc = mwl8k_post_cmd(hw, &cmd->header); + kfree(cmd); + + return rc; +} + + +/* + * Interrupt handling. + */ +static irqreturn_t mwl8k_interrupt(int irq, void *dev_id) +{ + struct ieee80211_hw *hw = dev_id; + struct mwl8k_priv *priv = hw->priv; + u32 status; + + status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + + status &= priv->int_mask; + if (!status) + return IRQ_NONE; + + if (status & MWL8K_A2H_INT_TX_DONE) + tasklet_schedule(&priv->tx_reclaim_task); + + if (status & MWL8K_A2H_INT_RX_READY) { + while (rxq_process(hw, 0, 1)) + rxq_refill(hw, 0, 1); + } + + if (status & MWL8K_A2H_INT_OPC_DONE) { + if (priv->hostcmd_wait != NULL) { + complete(priv->hostcmd_wait); + priv->hostcmd_wait = NULL; + } + } + + if (status & MWL8K_A2H_INT_QUEUE_EMPTY) { + if (!priv->inconfig && + priv->radio_state && + mwl8k_txq_busy(priv)) + mwl8k_tx_start(priv); + } + + return IRQ_HANDLED; +} + + +/* + * Core driver operations. + */ +static int mwl8k_tx(struct ieee80211_hw *hw, struct sk_buff *skb) +{ + struct mwl8k_priv *priv = hw->priv; + int index = skb_get_queue_mapping(skb); + int rc; + + if (priv->current_channel == NULL) { + printk(KERN_DEBUG "%s: dropped TX frame since radio " + "disabled\n", priv->name); + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + rc = mwl8k_txq_xmit(hw, index, skb); + + return rc; +} + +struct mwl8k_work_struct { + /* Initialized by mwl8k_queue_work(). */ + struct work_struct wt; + + /* Required field passed in to mwl8k_queue_work(). */ + struct ieee80211_hw *hw; + + /* Required field passed in to mwl8k_queue_work(). */ + int (*wfunc)(struct work_struct *w); + + /* Initialized by mwl8k_queue_work(). */ + struct completion *cmd_wait; + + /* Result code. */ + int rc; + + /* + * Optional field. Refer to explanation of MWL8K_WQ_XXX_XXX + * flags for explanation. Defaults to MWL8K_WQ_DEFAULT_OPTIONS. + */ + u32 options; + + /* Optional field. Defaults to MWL8K_CONFIG_TIMEOUT_MS. */ + unsigned long timeout_ms; + + /* Optional field. Defaults to MWL8K_WQ_TXWAIT_ATTEMPTS. */ + u32 txwait_attempts; + + /* Optional field. Defaults to MWL8K_TXWAIT_MS. */ + u32 tx_timeout_ms; + u32 step; +}; + +/* Flags controlling behavior of config queue requests */ + +/* Caller spins while waiting for completion. */ +#define MWL8K_WQ_SPIN 0x00000001 + +/* Wait for TX queues to empty before proceeding with configuration. */ +#define MWL8K_WQ_TX_WAIT_EMPTY 0x00000002 + +/* Queue request and return immediately. */ +#define MWL8K_WQ_POST_REQUEST 0x00000004 + +/* + * Caller sleeps and waits for task complete notification. + * Do not use in atomic context. + */ +#define MWL8K_WQ_SLEEP 0x00000008 + +/* Free work struct when task is done. */ +#define MWL8K_WQ_FREE_WORKSTRUCT 0x00000010 + +/* + * Config request is queued and returns to caller imediately. Use + * this in atomic context. Work struct is freed by mwl8k_queue_work() + * when this flag is set. + */ +#define MWL8K_WQ_QUEUE_ONLY (MWL8K_WQ_POST_REQUEST | \ + MWL8K_WQ_FREE_WORKSTRUCT) + +/* Default work queue behavior is to sleep and wait for tx completion. */ +#define MWL8K_WQ_DEFAULT_OPTIONS (MWL8K_WQ_SLEEP | MWL8K_WQ_TX_WAIT_EMPTY) + +/* + * Default config request timeout. Add adjustments to make sure the + * config thread waits long enough for both tx wait and cmd wait before + * timing out. + */ + +/* Time to wait for all TXQs to drain. TX Doorbell is pressed each time. */ +#define MWL8K_TXWAIT_TIMEOUT_MS 1000 + +/* Default number of TX wait attempts. */ +#define MWL8K_WQ_TXWAIT_ATTEMPTS 4 + +/* Total time to wait for TXQ to drain. */ +#define MWL8K_TXWAIT_MS (MWL8K_TXWAIT_TIMEOUT_MS * \ + MWL8K_WQ_TXWAIT_ATTEMPTS) + +/* Scheduling slop. */ +#define MWL8K_OS_SCHEDULE_OVERHEAD_MS 200 + +#define MWL8K_CONFIG_TIMEOUT_MS (MWL8K_CMD_TIMEOUT_MS + \ + MWL8K_TXWAIT_MS + \ + MWL8K_OS_SCHEDULE_OVERHEAD_MS) + +static void mwl8k_config_thread(struct work_struct *wt) +{ + struct mwl8k_work_struct *worker = (struct mwl8k_work_struct *)wt; + struct ieee80211_hw *hw = worker->hw; + struct mwl8k_priv *priv = hw->priv; + int rc = 0; + + spin_lock_irq(&priv->tx_lock); + priv->inconfig = true; + spin_unlock_irq(&priv->tx_lock); + + ieee80211_stop_queues(hw); + + /* + * Wait for host queues to drain before doing PHY + * reconfiguration. This avoids interrupting any in-flight + * DMA transfers to the hardware. + */ + if (worker->options & MWL8K_WQ_TX_WAIT_EMPTY) { + u32 timeout; + u32 time_remaining; + u32 iter; + u32 tx_wait_attempts = worker->txwait_attempts; + + time_remaining = worker->tx_timeout_ms; + if (!tx_wait_attempts) + tx_wait_attempts = 1; + + timeout = worker->tx_timeout_ms/tx_wait_attempts; + if (!timeout) + timeout = 1; + + iter = tx_wait_attempts; + do { + int wait_time; + + if (time_remaining > timeout) { + time_remaining -= timeout; + wait_time = timeout; + } else + wait_time = time_remaining; + + if (!wait_time) + wait_time = 1; + + rc = mwl8k_tx_wait_empty(hw, wait_time); + if (rc) + printk(KERN_ERR "%s() txwait timeout=%ums " + "Retry:%u/%u\n", __func__, timeout, + tx_wait_attempts - iter + 1, + tx_wait_attempts); + + } while (rc && --iter); + + rc = iter ? 0 : -ETIMEDOUT; + } + if (!rc) + rc = worker->wfunc(wt); + + spin_lock_irq(&priv->tx_lock); + priv->inconfig = false; + if (priv->pending_tx_pkts && priv->radio_state) + mwl8k_tx_start(priv); + spin_unlock_irq(&priv->tx_lock); + ieee80211_wake_queues(hw); + + worker->rc = rc; + if (worker->options & MWL8K_WQ_SLEEP) + complete(worker->cmd_wait); + + if (worker->options & MWL8K_WQ_FREE_WORKSTRUCT) + kfree(wt); +} + +static int mwl8k_queue_work(struct ieee80211_hw *hw, + struct mwl8k_work_struct *worker, + struct workqueue_struct *wqueue, + int (*wfunc)(struct work_struct *w)) +{ + unsigned long timeout = 0; + int rc = 0; + + DECLARE_COMPLETION_ONSTACK(cmd_wait); + + if (!worker->timeout_ms) + worker->timeout_ms = MWL8K_CONFIG_TIMEOUT_MS; + + if (!worker->options) + worker->options = MWL8K_WQ_DEFAULT_OPTIONS; + + if (!worker->txwait_attempts) + worker->txwait_attempts = MWL8K_WQ_TXWAIT_ATTEMPTS; + + if (!worker->tx_timeout_ms) + worker->tx_timeout_ms = MWL8K_TXWAIT_MS; + + worker->hw = hw; + worker->cmd_wait = &cmd_wait; + worker->rc = 1; + worker->wfunc = wfunc; + + INIT_WORK(&worker->wt, mwl8k_config_thread); + queue_work(wqueue, &worker->wt); + + if (worker->options & MWL8K_WQ_POST_REQUEST) { + rc = 0; + } else { + if (worker->options & MWL8K_WQ_SPIN) { + timeout = worker->timeout_ms; + while (timeout && (worker->rc > 0)) { + mdelay(1); + timeout--; + } + } else if (worker->options & MWL8K_WQ_SLEEP) + timeout = wait_for_completion_timeout(&cmd_wait, + msecs_to_jiffies(worker->timeout_ms)); + + if (timeout) + rc = worker->rc; + else { + cancel_work_sync(&worker->wt); + rc = -ETIMEDOUT; + } + } + + return rc; +} + +struct mwl8k_start_worker { + struct mwl8k_work_struct header; +}; + +static int mwl8k_start_wt(struct work_struct *wt) +{ + struct mwl8k_start_worker *worker = (struct mwl8k_start_worker *)wt; + struct ieee80211_hw *hw = worker->header.hw; + struct mwl8k_priv *priv = hw->priv; + int rc = 0; + + if (priv->vif != NULL) { + rc = -EIO; + goto mwl8k_start_exit; + } + + /* Turn on radio */ + if (mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE)) { + rc = -EIO; + goto mwl8k_start_exit; + } + + /* Purge TX/RX HW queues */ + if (mwl8k_cmd_set_pre_scan(hw)) { + rc = -EIO; + goto mwl8k_start_exit; + } + + if (mwl8k_cmd_set_post_scan(hw, "\x00\x00\x00\x00\x00\x00")) { + rc = -EIO; + goto mwl8k_start_exit; + } + + /* Enable firmware rate adaptation */ + if (mwl8k_cmd_setrateadaptmode(hw, 0)) { + rc = -EIO; + goto mwl8k_start_exit; + } + + /* Disable WMM. WMM gets enabled when stack sends WMM parms */ + if (mwl8k_set_wmm(hw, MWL8K_WMM_DISABLE)) { + rc = -EIO; + goto mwl8k_start_exit; + } + + /* Disable sniffer mode */ + if (mwl8k_enable_sniffer(hw, 0)) + rc = -EIO; + +mwl8k_start_exit: + return rc; +} + +static int mwl8k_start(struct ieee80211_hw *hw) +{ + struct mwl8k_start_worker *worker; + struct mwl8k_priv *priv = hw->priv; + int rc; + + /* Enable tx reclaim tasklet */ + tasklet_enable(&priv->tx_reclaim_task); + + rc = request_irq(priv->pdev->irq, &mwl8k_interrupt, + IRQF_SHARED, MWL8K_NAME, hw); + if (rc) { + printk(KERN_ERR "%s: failed to register IRQ handler\n", + priv->name); + rc = -EIO; + goto mwl8k_start_disable_tasklet; + } + + /* Enable interrupts */ + iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + + worker = kzalloc(sizeof(*worker), GFP_KERNEL); + if (worker == NULL) { + rc = -ENOMEM; + goto mwl8k_start_disable_irq; + } + + rc = mwl8k_queue_work(hw, &worker->header, + priv->config_wq, mwl8k_start_wt); + kfree(worker); + if (!rc) + return rc; + + if (rc == -ETIMEDOUT) + printk(KERN_ERR "%s() timed out\n", __func__); + + rc = -EIO; + +mwl8k_start_disable_irq: + spin_lock_irq(&priv->tx_lock); + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + spin_unlock_irq(&priv->tx_lock); + free_irq(priv->pdev->irq, hw); + +mwl8k_start_disable_tasklet: + tasklet_disable(&priv->tx_reclaim_task); + + return rc; +} + +struct mwl8k_stop_worker { + struct mwl8k_work_struct header; +}; + +static int mwl8k_stop_wt(struct work_struct *wt) +{ + struct mwl8k_stop_worker *worker = (struct mwl8k_stop_worker *)wt; + struct ieee80211_hw *hw = worker->header.hw; + int rc; + + rc = mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE); + + return rc; +} + +static void mwl8k_stop(struct ieee80211_hw *hw) +{ + int rc; + struct mwl8k_stop_worker *worker; + struct mwl8k_priv *priv = hw->priv; + int i; + + if (priv->vif != NULL) + return; + + ieee80211_stop_queues(hw); + + worker = kzalloc(sizeof(*worker), GFP_KERNEL); + if (worker == NULL) + return; + + rc = mwl8k_queue_work(hw, &worker->header, + priv->config_wq, mwl8k_stop_wt); + kfree(worker); + if (rc == -ETIMEDOUT) + printk(KERN_ERR "%s() timed out\n", __func__); + + /* Disable interrupts */ + spin_lock_irq(&priv->tx_lock); + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + spin_unlock_irq(&priv->tx_lock); + free_irq(priv->pdev->irq, hw); + + /* Stop finalize join worker */ + cancel_work_sync(&priv->finalize_join_worker); + if (priv->beacon_skb != NULL) + dev_kfree_skb(priv->beacon_skb); + + /* Stop tx reclaim tasklet */ + tasklet_disable(&priv->tx_reclaim_task); + + /* Stop config thread */ + flush_workqueue(priv->config_wq); + + /* Return all skbs to mac80211 */ + for (i = 0; i < MWL8K_TX_QUEUES; i++) + mwl8k_txq_reclaim(hw, i, 1); +} + +static int mwl8k_add_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *mwl8k_vif; + + /* + * We only support one active interface at a time. + */ + if (priv->vif != NULL) + return -EBUSY; + + /* + * We only support managed interfaces for now. + */ + if (conf->type != NL80211_IFTYPE_STATION && + conf->type != NL80211_IFTYPE_MONITOR) + return -EINVAL; + + /* Clean out driver private area */ + mwl8k_vif = MWL8K_VIF(conf->vif); + memset(mwl8k_vif, 0, sizeof(*mwl8k_vif)); + + /* Save the mac address */ + memcpy(mwl8k_vif->mac_addr, conf->mac_addr, IEEE80211_ADDR_LEN); + + /* Back pointer to parent config block */ + mwl8k_vif->priv = priv; + + /* Setup initial PHY parameters */ + memcpy(mwl8k_vif->legacy_rates , + priv->rates, sizeof(mwl8k_vif->legacy_rates)); + mwl8k_vif->legacy_nrates = ARRAY_SIZE(priv->rates); + + /* Set Initial sequence number to zero */ + mwl8k_vif->seqno = 0; + + priv->vif = conf->vif; + priv->current_channel = NULL; + + return 0; +} + +static void mwl8k_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_if_init_conf *conf) +{ + struct mwl8k_priv *priv = hw->priv; + + if (priv->vif == NULL) + return; + + priv->vif = NULL; +} + +struct mwl8k_config_worker { + struct mwl8k_work_struct header; + u32 changed; +}; + +static int mwl8k_config_wt(struct work_struct *wt) +{ + struct mwl8k_config_worker *worker = + (struct mwl8k_config_worker *)wt; + struct ieee80211_hw *hw = worker->header.hw; + struct ieee80211_conf *conf = &hw->conf; + struct mwl8k_priv *priv = hw->priv; + int rc = 0; + + if (!conf->radio_enabled) { + mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE); + priv->current_channel = NULL; + rc = 0; + goto mwl8k_config_exit; + } + + if (mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE)) { + rc = -EINVAL; + goto mwl8k_config_exit; + } + + priv->current_channel = conf->channel; + + if (mwl8k_cmd_set_rf_channel(hw, conf->channel)) { + rc = -EINVAL; + goto mwl8k_config_exit; + } + + if (conf->power_level > 18) + conf->power_level = 18; + if (mwl8k_cmd_802_11_rf_tx_power(hw, conf->power_level)) { + rc = -EINVAL; + goto mwl8k_config_exit; + } + + if (mwl8k_cmd_mimo_config(hw, 0x7, 0x7)) + rc = -EINVAL; + +mwl8k_config_exit: + return rc; +} + +static int mwl8k_config(struct ieee80211_hw *hw, u32 changed) +{ + int rc = 0; + struct mwl8k_config_worker *worker; + struct mwl8k_priv *priv = hw->priv; + + worker = kzalloc(sizeof(*worker), GFP_KERNEL); + if (worker == NULL) + return -ENOMEM; + + worker->changed = changed; + rc = mwl8k_queue_work(hw, &worker->header, + priv->config_wq, mwl8k_config_wt); + if (rc == -ETIMEDOUT) { + printk(KERN_ERR "%s() timed out.\n", __func__); + rc = -EINVAL; + } + + kfree(worker); + + /* + * mac80211 will crash on anything other than -EINVAL on + * error. Looks like wireless extensions which calls mac80211 + * may be the actual culprit... + */ + return rc ? -EINVAL : 0; +} + +static int mwl8k_config_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_if_conf *conf) +{ + struct mwl8k_vif *mv_vif = MWL8K_VIF(vif); + u32 changed = conf->changed; + + if (changed & IEEE80211_IFCC_BSSID) + memcpy(mv_vif->bssid, conf->bssid, IEEE80211_ADDR_LEN); + + return 0; +} + +struct mwl8k_bss_info_changed_worker { + struct mwl8k_work_struct header; + struct ieee80211_vif *vif; + struct ieee80211_bss_conf *info; + u32 changed; +}; + +static int mwl8k_bss_info_changed_wt(struct work_struct *wt) +{ + struct mwl8k_bss_info_changed_worker *worker = + (struct mwl8k_bss_info_changed_worker *)wt; + struct ieee80211_hw *hw = worker->header.hw; + struct ieee80211_vif *vif = worker->vif; + struct ieee80211_bss_conf *info = worker->info; + u32 changed; + int rc; + + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); + + changed = worker->changed; + priv->capture_beacon = false; + + if (info->assoc) { + memcpy(&mwl8k_vif->bss_info, info, + sizeof(struct ieee80211_bss_conf)); + + /* Install rates */ + if (mwl8k_update_rateset(hw, vif)) + goto mwl8k_bss_info_changed_exit; + + /* Turn on rate adaptation */ + if (mwl8k_cmd_use_fixed_rate(hw, MWL8K_USE_AUTO_RATE, + MWL8K_UCAST_RATE, NULL)) + goto mwl8k_bss_info_changed_exit; + + /* Set radio preamble */ + if (mwl8k_set_radio_preamble(hw, + info->use_short_preamble)) + goto mwl8k_bss_info_changed_exit; + + /* Set slot time */ + if (mwl8k_cmd_set_slot(hw, info->use_short_slot ? + MWL8K_SHORT_SLOTTIME : MWL8K_LONG_SLOTTIME)) + goto mwl8k_bss_info_changed_exit; + + /* Update peer rate info */ + if (mwl8k_cmd_update_sta_db(hw, vif, + MWL8K_STA_DB_MODIFY_ENTRY)) + goto mwl8k_bss_info_changed_exit; + + /* Set AID */ + if (mwl8k_cmd_set_aid(hw, vif)) + goto mwl8k_bss_info_changed_exit; + + /* + * Finalize the join. Tell rx handler to process + * next beacon from our BSSID. + */ + memcpy(priv->capture_bssid, + mwl8k_vif->bssid, IEEE80211_ADDR_LEN); + priv->capture_beacon = true; + } else { + mwl8k_cmd_update_sta_db(hw, vif, MWL8K_STA_DB_DEL_ENTRY); + memset(&mwl8k_vif->bss_info, 0, + sizeof(struct ieee80211_bss_conf)); + memset(mwl8k_vif->bssid, 0, IEEE80211_ADDR_LEN); + } + +mwl8k_bss_info_changed_exit: + rc = 0; + return rc; +} + +static void mwl8k_bss_info_changed(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_bss_conf *info, + u32 changed) +{ + struct mwl8k_bss_info_changed_worker *worker; + struct mwl8k_priv *priv = hw->priv; + int rc; + + if ((changed & BSS_CHANGED_ASSOC) == 0) + return; + + worker = kzalloc(sizeof(*worker), GFP_KERNEL); + if (worker == NULL) + return; + + worker->vif = vif; + worker->info = info; + worker->changed = changed; + rc = mwl8k_queue_work(hw, &worker->header, + priv->config_wq, + mwl8k_bss_info_changed_wt); + kfree(worker); + if (rc == -ETIMEDOUT) + printk(KERN_ERR "%s() timed out\n", __func__); +} + +struct mwl8k_configure_filter_worker { + struct mwl8k_work_struct header; + unsigned int changed_flags; + unsigned int *total_flags; + int mc_count; + struct dev_addr_list *mclist; +}; + +#define MWL8K_SUPPORTED_IF_FLAGS FIF_BCN_PRBRESP_PROMISC + +static int mwl8k_configure_filter_wt(struct work_struct *wt) +{ + struct mwl8k_configure_filter_worker *worker = + (struct mwl8k_configure_filter_worker *)wt; + + struct ieee80211_hw *hw = worker->header.hw; + unsigned int changed_flags = worker->changed_flags; + unsigned int *total_flags = worker->total_flags; + int mc_count = worker->mc_count; + struct dev_addr_list *mclist = worker->mclist; + + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_vif *mv_vif; + int rc = 0; + + if (changed_flags & FIF_BCN_PRBRESP_PROMISC) { + if (*total_flags & FIF_BCN_PRBRESP_PROMISC) + rc = mwl8k_cmd_set_pre_scan(hw); + else { + mv_vif = MWL8K_VIF(priv->vif); + rc = mwl8k_cmd_set_post_scan(hw, mv_vif->bssid); + } + } + + if (rc) + goto mwl8k_configure_filter_exit; + if (mc_count) { + mc_count = mc_count < priv->num_mcaddrs ? + mc_count : priv->num_mcaddrs; + rc = mwl8k_cmd_mac_multicast_adr(hw, mc_count, mclist); + if (rc) + printk(KERN_ERR + "%s()Error setting multicast addresses\n", + __func__); + } + +mwl8k_configure_filter_exit: + return rc; +} + +static void mwl8k_configure_filter(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *total_flags, + int mc_count, + struct dev_addr_list *mclist) +{ + + struct mwl8k_configure_filter_worker *worker; + struct mwl8k_priv *priv = hw->priv; + + /* Clear unsupported feature flags */ + *total_flags &= MWL8K_SUPPORTED_IF_FLAGS; + + if (!(changed_flags & MWL8K_SUPPORTED_IF_FLAGS) && !mc_count) + return; + + worker = kzalloc(sizeof(*worker), GFP_ATOMIC); + if (worker == NULL) + return; + + worker->header.options = MWL8K_WQ_QUEUE_ONLY | MWL8K_WQ_TX_WAIT_EMPTY; + worker->changed_flags = changed_flags; + worker->total_flags = total_flags; + worker->mc_count = mc_count; + worker->mclist = mclist; + + mwl8k_queue_work(hw, &worker->header, priv->config_wq, + mwl8k_configure_filter_wt); +} + +struct mwl8k_set_rts_threshold_worker { + struct mwl8k_work_struct header; + u32 value; +}; + +static int mwl8k_set_rts_threshold_wt(struct work_struct *wt) +{ + struct mwl8k_set_rts_threshold_worker *worker = + (struct mwl8k_set_rts_threshold_worker *)wt; + + struct ieee80211_hw *hw = worker->header.hw; + u16 threshold = (u16)(worker->value); + int rc; + + rc = mwl8k_rts_threshold(hw, MWL8K_CMD_SET, &threshold); + + return rc; +} + +static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value) +{ + int rc; + struct mwl8k_set_rts_threshold_worker *worker; + struct mwl8k_priv *priv = hw->priv; + + worker = kzalloc(sizeof(*worker), GFP_KERNEL); + if (worker == NULL) + return -ENOMEM; + + worker->value = value; + + rc = mwl8k_queue_work(hw, &worker->header, + priv->config_wq, + mwl8k_set_rts_threshold_wt); + kfree(worker); + + if (rc == -ETIMEDOUT) { + printk(KERN_ERR "%s() timed out\n", __func__); + rc = -EINVAL; + } + + return rc; +} + +struct mwl8k_conf_tx_worker { + struct mwl8k_work_struct header; + u16 queue; + const struct ieee80211_tx_queue_params *params; +}; + +static int mwl8k_conf_tx_wt(struct work_struct *wt) +{ + struct mwl8k_conf_tx_worker *worker = + (struct mwl8k_conf_tx_worker *)wt; + + struct ieee80211_hw *hw = worker->header.hw; + u16 queue = worker->queue; + const struct ieee80211_tx_queue_params *params = worker->params; + + struct mwl8k_priv *priv = hw->priv; + int rc = 0; + + if (priv->wmm_mode == MWL8K_WMM_DISABLE) + if (mwl8k_set_wmm(hw, MWL8K_WMM_ENABLE)) { + rc = -EINVAL; + goto mwl8k_conf_tx_exit; + } + + if (mwl8k_set_edca_params(hw, GET_TXQ(queue), params->cw_min, + params->cw_max, params->aifs, params->txop)) + rc = -EINVAL; +mwl8k_conf_tx_exit: + return rc; +} + +static int mwl8k_conf_tx(struct ieee80211_hw *hw, u16 queue, + const struct ieee80211_tx_queue_params *params) +{ + int rc; + struct mwl8k_conf_tx_worker *worker; + struct mwl8k_priv *priv = hw->priv; + + worker = kzalloc(sizeof(*worker), GFP_KERNEL); + if (worker == NULL) + return -ENOMEM; + + worker->queue = queue; + worker->params = params; + rc = mwl8k_queue_work(hw, &worker->header, + priv->config_wq, mwl8k_conf_tx_wt); + kfree(worker); + if (rc == -ETIMEDOUT) { + printk(KERN_ERR "%s() timed out\n", __func__); + rc = -EINVAL; + } + return rc; +} + +static int mwl8k_get_tx_stats(struct ieee80211_hw *hw, + struct ieee80211_tx_queue_stats *stats) +{ + struct mwl8k_priv *priv = hw->priv; + struct mwl8k_tx_queue *txq; + int index; + + spin_lock_bh(&priv->tx_lock); + for (index = 0; index < MWL8K_TX_QUEUES; index++) { + txq = priv->txq + index; + memcpy(&stats[index], &txq->tx_stats, + sizeof(struct ieee80211_tx_queue_stats)); + } + spin_unlock_bh(&priv->tx_lock); + return 0; +} + +struct mwl8k_get_stats_worker { + struct mwl8k_work_struct header; + struct ieee80211_low_level_stats *stats; +}; + +static int mwl8k_get_stats_wt(struct work_struct *wt) +{ + struct mwl8k_get_stats_worker *worker = + (struct mwl8k_get_stats_worker *)wt; + + return mwl8k_cmd_802_11_get_stat(worker->header.hw, worker->stats); +} + +static int mwl8k_get_stats(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats) +{ + int rc; + struct mwl8k_get_stats_worker *worker; + struct mwl8k_priv *priv = hw->priv; + + worker = kzalloc(sizeof(*worker), GFP_KERNEL); + if (worker == NULL) + return -ENOMEM; + + worker->stats = stats; + rc = mwl8k_queue_work(hw, &worker->header, + priv->config_wq, mwl8k_get_stats_wt); + + kfree(worker); + if (rc == -ETIMEDOUT) { + printk(KERN_ERR "%s() timed out\n", __func__); + rc = -EINVAL; + } + + return rc; +} + +static const struct ieee80211_ops mwl8k_ops = { + .tx = mwl8k_tx, + .start = mwl8k_start, + .stop = mwl8k_stop, + .add_interface = mwl8k_add_interface, + .remove_interface = mwl8k_remove_interface, + .config = mwl8k_config, + .config_interface = mwl8k_config_interface, + .bss_info_changed = mwl8k_bss_info_changed, + .configure_filter = mwl8k_configure_filter, + .set_rts_threshold = mwl8k_set_rts_threshold, + .conf_tx = mwl8k_conf_tx, + .get_tx_stats = mwl8k_get_tx_stats, + .get_stats = mwl8k_get_stats, +}; + +static void mwl8k_tx_reclaim_handler(unsigned long data) +{ + int i; + struct ieee80211_hw *hw = (struct ieee80211_hw *) data; + struct mwl8k_priv *priv = hw->priv; + + spin_lock_bh(&priv->tx_lock); + for (i = 0; i < MWL8K_TX_QUEUES; i++) + mwl8k_txq_reclaim(hw, i, 0); + + if (priv->tx_wait != NULL) { + int count = mwl8k_txq_busy(priv); + if (count == 0) { + complete(priv->tx_wait); + priv->tx_wait = NULL; + } + } + spin_unlock_bh(&priv->tx_lock); +} + +static void mwl8k_finalize_join_worker(struct work_struct *work) +{ + struct mwl8k_priv *priv = + container_of(work, struct mwl8k_priv, finalize_join_worker); + struct sk_buff *skb = priv->beacon_skb; + u8 dtim = (MWL8K_VIF(priv->vif))->bss_info.dtim_period; + + mwl8k_finalize_join(priv->hw, skb->data, skb->len, dtim); + dev_kfree_skb(skb); + + priv->beacon_skb = NULL; +} + +static int __devinit mwl8k_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct ieee80211_hw *hw; + struct mwl8k_priv *priv; + DECLARE_MAC_BUF(mac); + int rc; + int i; + u8 *fw; + + rc = pci_enable_device(pdev); + if (rc) { + printk(KERN_ERR "%s: Cannot enable new PCI device\n", + MWL8K_NAME); + return rc; + } + + rc = pci_request_regions(pdev, MWL8K_NAME); + if (rc) { + printk(KERN_ERR "%s: Cannot obtain PCI resources\n", + MWL8K_NAME); + return rc; + } + + pci_set_master(pdev); + + hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops); + if (hw == NULL) { + printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME); + rc = -ENOMEM; + goto err_free_reg; + } + + priv = hw->priv; + priv->hw = hw; + priv->pdev = pdev; + priv->hostcmd_wait = NULL; + priv->tx_wait = NULL; + priv->inconfig = false; + priv->wep_enabled = 0; + priv->wmm_mode = false; + priv->pending_tx_pkts = 0; + strncpy(priv->name, MWL8K_NAME, sizeof(priv->name)); + + spin_lock_init(&priv->fw_lock); + + SET_IEEE80211_DEV(hw, &pdev->dev); + pci_set_drvdata(pdev, hw); + + priv->regs = pci_iomap(pdev, 1, 0x10000); + if (priv->regs == NULL) { + printk(KERN_ERR "%s: Cannot map device memory\n", priv->name); + goto err_iounmap; + } + + memcpy(priv->channels, mwl8k_channels, sizeof(mwl8k_channels)); + priv->band.band = IEEE80211_BAND_2GHZ; + priv->band.channels = priv->channels; + priv->band.n_channels = ARRAY_SIZE(mwl8k_channels); + priv->band.bitrates = priv->rates; + priv->band.n_bitrates = ARRAY_SIZE(mwl8k_rates); + hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band; + + BUILD_BUG_ON(sizeof(priv->rates) != sizeof(mwl8k_rates)); + memcpy(priv->rates, mwl8k_rates, sizeof(mwl8k_rates)); + + /* + * Extra headroom is the size of the required DMA header + * minus the size of the smallest 802.11 frame (CTS frame). + */ + hw->extra_tx_headroom = + sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts); + + hw->channel_change_time = 10; + + hw->queues = MWL8K_TX_QUEUES; + + hw->wiphy->interface_modes = + BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_MONITOR); + + /* Set rssi and noise values to dBm */ + hw->flags |= (IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM); + hw->vif_data_size = sizeof(struct mwl8k_vif); + priv->vif = NULL; + + /* Set default radio state and preamble */ + priv->radio_preamble = MWL8K_RADIO_DEFAULT_PREAMBLE; + priv->radio_state = MWL8K_RADIO_DISABLE; + + /* Finalize join worker */ + INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker); + + /* TX reclaim tasklet */ + tasklet_init(&priv->tx_reclaim_task, + mwl8k_tx_reclaim_handler, (unsigned long)hw); + tasklet_disable(&priv->tx_reclaim_task); + + /* Config workthread */ + priv->config_wq = create_singlethread_workqueue("mwl8k_config"); + if (priv->config_wq == NULL) + goto err_iounmap; + + /* Power management cookie */ + priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma); + if (priv->cookie == NULL) + goto err_iounmap; + + rc = mwl8k_rxq_init(hw, 0); + if (rc) + goto err_iounmap; + rxq_refill(hw, 0, INT_MAX); + + spin_lock_init(&priv->tx_lock); + + for (i = 0; i < MWL8K_TX_QUEUES; i++) { + rc = mwl8k_txq_init(hw, i); + if (rc) + goto err_free_queues; + } + + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); + priv->int_mask = 0; + iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL); + iowrite32(0xffffffff, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK); + + rc = request_irq(priv->pdev->irq, &mwl8k_interrupt, + IRQF_SHARED, MWL8K_NAME, hw); + if (rc) { + printk(KERN_ERR "%s: failed to register IRQ handler\n", + priv->name); + goto err_free_queues; + } + + /* Reset firmware and hardware */ + mwl8k_hw_reset(priv); + + /* Ask userland hotplug daemon for the device firmware */ + rc = mwl8k_request_firmware(priv, (u32)id->driver_data); + if (rc) { + printk(KERN_ERR "%s: Firmware files not found\n", priv->name); + goto err_free_irq; + } + + /* Load firmware into hardware */ + rc = mwl8k_load_firmware(priv); + if (rc) { + printk(KERN_ERR "%s: Cannot start firmware\n", priv->name); + goto err_stop_firmware; + } + + /* Reclaim memory once firmware is successfully loaded */ + mwl8k_release_firmware(priv); + + /* + * Temporarily enable interrupts. Initial firmware host + * commands use interrupts and avoids polling. Disable + * interrupts when done. + */ + priv->int_mask |= MWL8K_A2H_EVENTS; + + iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + + /* Get config data, mac addrs etc */ + rc = mwl8k_cmd_get_hw_spec(hw); + if (rc) { + printk(KERN_ERR "%s: Cannot initialise firmware\n", priv->name); + goto err_stop_firmware; + } + + /* Turn radio off */ + rc = mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE); + if (rc) { + printk(KERN_ERR "%s: Cannot disable\n", priv->name); + goto err_stop_firmware; + } + + /* Disable interrupts */ + spin_lock_irq(&priv->tx_lock); + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + spin_unlock_irq(&priv->tx_lock); + free_irq(priv->pdev->irq, hw); + + rc = ieee80211_register_hw(hw); + if (rc) { + printk(KERN_ERR "%s: Cannot register device\n", priv->name); + goto err_stop_firmware; + } + + fw = (u8 *)&priv->fw_rev; + printk(KERN_INFO "%s: 88W%u %s\n", priv->name, priv->part_num, + MWL8K_DESC); + printk(KERN_INFO "%s: Driver Ver:%s Firmware Ver:%u.%u.%u.%u\n", + priv->name, MWL8K_VERSION, fw[3], fw[2], fw[1], fw[0]); + printk(KERN_INFO "%s: MAC Address: %s\n", priv->name, + print_mac(mac, hw->wiphy->perm_addr)); + + return 0; + +err_stop_firmware: + mwl8k_hw_reset(priv); + mwl8k_release_firmware(priv); + +err_free_irq: + spin_lock_irq(&priv->tx_lock); + iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); + spin_unlock_irq(&priv->tx_lock); + free_irq(priv->pdev->irq, hw); + +err_free_queues: + for (i = 0; i < MWL8K_TX_QUEUES; i++) + mwl8k_txq_deinit(hw, i); + mwl8k_rxq_deinit(hw, 0); + +err_iounmap: + if (priv->cookie != NULL) + pci_free_consistent(priv->pdev, 4, + priv->cookie, priv->cookie_dma); + + if (priv->regs != NULL) + pci_iounmap(pdev, priv->regs); + + if (priv->config_wq != NULL) + destroy_workqueue(priv->config_wq); + + pci_set_drvdata(pdev, NULL); + ieee80211_free_hw(hw); + +err_free_reg: + pci_release_regions(pdev); + pci_disable_device(pdev); + + return rc; +} + +static void __devexit mwl8k_remove(struct pci_dev *pdev) +{ + printk(KERN_ERR "===>%s(%u)\n", __func__, __LINE__); +} + +static void __devexit mwl8k_shutdown(struct pci_dev *pdev) +{ + struct ieee80211_hw *hw = pci_get_drvdata(pdev); + struct mwl8k_priv *priv; + int i; + + if (hw == NULL) + return; + priv = hw->priv; + + ieee80211_stop_queues(hw); + + /* Remove tx reclaim tasklet */ + tasklet_kill(&priv->tx_reclaim_task); + + /* Stop config thread */ + destroy_workqueue(priv->config_wq); + + /* Stop hardware */ + mwl8k_hw_reset(priv); + + /* Return all skbs to mac80211 */ + for (i = 0; i < MWL8K_TX_QUEUES; i++) + mwl8k_txq_reclaim(hw, i, 1); + + ieee80211_unregister_hw(hw); + + for (i = 0; i < MWL8K_TX_QUEUES; i++) + mwl8k_txq_deinit(hw, i); + + mwl8k_rxq_deinit(hw, 0); + + pci_free_consistent(priv->pdev, 4, + priv->cookie, priv->cookie_dma); + + pci_iounmap(pdev, priv->regs); + pci_set_drvdata(pdev, NULL); + ieee80211_free_hw(hw); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static struct pci_driver mwl8k_driver = { + .name = MWL8K_NAME, + .id_table = mwl8k_table, + .probe = mwl8k_probe, + .remove = __devexit_p(mwl8k_remove), + .shutdown = __devexit_p(mwl8k_shutdown), +}; + +static int __init mwl8k_init(void) +{ + return pci_register_driver(&mwl8k_driver); +} + +static void __exit mwl8k_exit(void) +{ + pci_unregister_driver(&mwl8k_driver); +} + +module_init(mwl8k_init); +module_exit(mwl8k_exit); |