--- /dev/null
+/*
+ * 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);
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff