/* Linux device driver for RTL8180 / RTL8185 / RTL8187SE
 *
 * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
 * Copyright 2007,2014 Andrea Merello <andrea.merello@gmail.com>
 *
 * Based on the r8180 driver, which is:
 * Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al.
 *
 * Thanks to Realtek for their support!
 *
 ************************************************************************
 *
 * The driver was extended to the RTL8187SE in 2014 by
 * Andrea Merello <andrea.merello@gmail.com>
 *
 * based also on:
 *  - portions of rtl8187se Linux staging driver, Copyright Realtek corp.
 *    (available in drivers/staging/rtl8187se directory of Linux 3.14)
 *  - other GPL, unpublished (until now), Linux driver code,
 *    Copyright Larry Finger <Larry.Finger@lwfinger.net>
 *
 * A huge thanks goes to Sara V. Nari who forgives me when I'm
 * sitting in front of my laptop at evening, week-end, night...
 *
 * A special thanks goes to Antonio Cuni, who helped me with
 * some python userspace stuff I used to debug RTL8187SE code, and who
 * bought a laptop with an unsupported Wi-Fi card some years ago...
 *
 * Thanks to Larry Finger for writing some code for rtl8187se and for
 * his suggestions.
 *
 * Thanks to Dan Carpenter for reviewing my initial patch and for his
 * suggestions.
 *
 * Thanks to Bernhard Schiffner for his help in testing and for his
 * suggestions.
 *
 ************************************************************************
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/eeprom_93cx6.h>
#include <linux/module.h>
#include <net/mac80211.h>

#include "rtl8180.h"
#include "rtl8225.h"
#include "sa2400.h"
#include "max2820.h"
#include "grf5101.h"
#include "rtl8225se.h"

MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_AUTHOR("Andrea Merello <andrea.merello@gmail.com>");
MODULE_DESCRIPTION("RTL8180 / RTL8185 / RTL8187SE PCI wireless driver");
MODULE_LICENSE("GPL");

static const struct pci_device_id rtl8180_table[] = {

        /* rtl8187se */
        { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8199) },

        /* rtl8185 */
        { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8185) },
        { PCI_DEVICE(PCI_VENDOR_ID_BELKIN, 0x700f) },
        { PCI_DEVICE(PCI_VENDOR_ID_BELKIN, 0x701f) },

        /* rtl8180 */
        { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8180) },
        { PCI_DEVICE(0x1799, 0x6001) },
        { PCI_DEVICE(0x1799, 0x6020) },
        { PCI_DEVICE(PCI_VENDOR_ID_DLINK, 0x3300) },
        { PCI_DEVICE(0x1186, 0x3301) },
        { PCI_DEVICE(0x1432, 0x7106) },
        { }
};

MODULE_DEVICE_TABLE(pci, rtl8180_table);

static const struct ieee80211_rate rtl818x_rates[] = {
        { .bitrate = 10, .hw_value = 0, },
        { .bitrate = 20, .hw_value = 1, },
        { .bitrate = 55, .hw_value = 2, },
        { .bitrate = 110, .hw_value = 3, },
        { .bitrate = 60, .hw_value = 4, },
        { .bitrate = 90, .hw_value = 5, },
        { .bitrate = 120, .hw_value = 6, },
        { .bitrate = 180, .hw_value = 7, },
        { .bitrate = 240, .hw_value = 8, },
        { .bitrate = 360, .hw_value = 9, },
        { .bitrate = 480, .hw_value = 10, },
        { .bitrate = 540, .hw_value = 11, },
};

static const struct ieee80211_channel rtl818x_channels[] = {
        { .center_freq = 2412 },
        { .center_freq = 2417 },
        { .center_freq = 2422 },
        { .center_freq = 2427 },
        { .center_freq = 2432 },
        { .center_freq = 2437 },
        { .center_freq = 2442 },
        { .center_freq = 2447 },
        { .center_freq = 2452 },
        { .center_freq = 2457 },
        { .center_freq = 2462 },
        { .center_freq = 2467 },
        { .center_freq = 2472 },
        { .center_freq = 2484 },
};

/* Queues for rtl8187se card
 *
 * name | reg  |  queue
 *  BC  |  7   |   6
 *  MG  |  1   |   0
 *  HI  |  6   |   1
 *  VO  |  5   |   2
 *  VI  |  4   |   3
 *  BE  |  3   |   4
 *  BK  |  2   |   5
 *
 * The complete map for DMA kick reg using use all queue is:
 * static const int rtl8187se_queues_map[RTL8187SE_NR_TX_QUEUES] =
 *      {1, 6, 5, 4, 3, 2, 7};
 *
 * .. but.. Because for mac80211 4 queues are enough for QoS we use this
 *
 * name | reg  |  queue
 *  BC  |  7   |   4  <- currently not used yet
 *  MG  |  1   |   x  <- Not used
 *  HI  |  6   |   x  <- Not used
 *  VO  |  5   |   0  <- used
 *  VI  |  4   |   1  <- used
 *  BE  |  3   |   2  <- used
 *  BK  |  2   |   3  <- used
 *
 * Beacon queue could be used, but this is not finished yet.
 *
 * I thougth about using the other two queues but I decided not to do this:
 *
 * - I'm unsure whether the mac80211 will ever try to use more than 4 queues
 *   by itself.
 *
 * - I could route MGMT frames (currently sent over VO queue) to the MGMT
 *   queue but since mac80211 will do not know about it, I will probably gain
 *   some HW priority whenever the VO queue is not empty, but this gain is
 *   limited by the fact that I had to stop the mac80211 queue whenever one of
 *   the VO or MGMT queues is full, stopping also submitting of MGMT frame
 *   to the driver.
 *
 * - I don't know how to set in the HW the contention window params for MGMT
 *   and HI-prio queues.
 */

static const int rtl8187se_queues_map[RTL8187SE_NR_TX_QUEUES] = {5, 4, 3, 2, 7};

/* Queues for rtl8180/rtl8185 cards
 *
 * name | reg  |  prio
 *  BC  |  7   |   3
 *  HI  |  6   |   0
 *  NO  |  5   |   1
 *  LO  |  4   |   2
 *
 * The complete map for DMA kick reg using all queue is:
 * static const int rtl8180_queues_map[RTL8180_NR_TX_QUEUES] = {6, 5, 4, 7};
 *
 * .. but .. Because the mac80211 needs at least 4 queues for QoS or
 * otherwise QoS can't be done, we use just one.
 * Beacon queue could be used, but this is not finished yet.
 * Actual map is:
 *
 * name | reg  |  prio
 *  BC  |  7   |   1  <- currently not used yet.
 *  HI  |  6   |   x  <- not used
 *  NO  |  5   |   x  <- not used
 *  LO  |  4   |   0  <- used
 */

static const int rtl8180_queues_map[RTL8180_NR_TX_QUEUES] = {4, 7};

/* LNA gain table for rtl8187se */
static const u8 rtl8187se_lna_gain[4] = {02, 17, 29, 39};

void rtl8180_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
{
        struct rtl8180_priv *priv = dev->priv;
        int i = 10;
        u32 buf;

        buf = (data << 8) | addr;

        rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->PHY[0], buf | 0x80);
        while (i--) {
                rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->PHY[0], buf);
                if (rtl818x_ioread8(priv, &priv->map->PHY[2]) == (data & 0xFF))
                        return;
        }
}

static void rtl8180_handle_rx(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;
        struct rtl818x_rx_cmd_desc *cmd_desc;
        unsigned int count = 32;
        u8 agc, sq;
        s8 signal = 1;
        dma_addr_t mapping;

        while (count--) {
                void *entry = priv->rx_ring + priv->rx_idx * priv->rx_ring_sz;
                struct sk_buff *skb = priv->rx_buf[priv->rx_idx];
                u32 flags, flags2, flags3 = 0;
                u64 tsft;

                if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                        struct rtl8187se_rx_desc *desc = entry;

                        flags = le32_to_cpu(desc->flags);
                        /* if ownership flag is set, then we can trust the
                         * HW has written other fields. We must not trust
                         * other descriptor data read before we checked (read)
                         * the ownership flag
                         */
                        rmb();
                        flags3 = le32_to_cpu(desc->flags3);
                        flags2 = le32_to_cpu(desc->flags2);
                        tsft = le64_to_cpu(desc->tsft);
                } else {
                        struct rtl8180_rx_desc *desc = entry;

                        flags = le32_to_cpu(desc->flags);
                        /* same as above */
                        rmb();
                        flags2 = le32_to_cpu(desc->flags2);
                        tsft = le64_to_cpu(desc->tsft);
                }

                if (flags & RTL818X_RX_DESC_FLAG_OWN)
                        return;

                if (unlikely(flags & (RTL818X_RX_DESC_FLAG_DMA_FAIL |
                                      RTL818X_RX_DESC_FLAG_FOF |
                                      RTL818X_RX_DESC_FLAG_RX_ERR)))
                        goto done;
                else {
                        struct ieee80211_rx_status rx_status = {0};
                        struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_SIZE);

                        if (unlikely(!new_skb))
                                goto done;

                        mapping = pci_map_single(priv->pdev,
                                               skb_tail_pointer(new_skb),
                                               MAX_RX_SIZE, PCI_DMA_FROMDEVICE);

                        if (pci_dma_mapping_error(priv->pdev, mapping)) {
                                kfree_skb(new_skb);
                                dev_err(&priv->pdev->dev, "RX DMA map error\n");

                                goto done;
                        }

                        pci_unmap_single(priv->pdev,
                                         *((dma_addr_t *)skb->cb),
                                         MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
                        skb_put(skb, flags & 0xFFF);

                        rx_status.antenna = (flags2 >> 15) & 1;
                        rx_status.rate_idx = (flags >> 20) & 0xF;
                        agc = (flags2 >> 17) & 0x7F;

                        switch (priv->chip_family) {
                        case RTL818X_CHIP_FAMILY_RTL8185:
                                if (rx_status.rate_idx > 3)
                                        signal = -clamp_t(u8, agc, 25, 90) - 9;
                                else
                                        signal = -clamp_t(u8, agc, 30, 95);
                                break;
                        case RTL818X_CHIP_FAMILY_RTL8180:
                                sq = flags2 & 0xff;
                                signal = priv->rf->calc_rssi(agc, sq);
                                break;
                        case RTL818X_CHIP_FAMILY_RTL8187SE:
                                /* OFDM measure reported by HW is signed,
                                 * in 0.5dBm unit, with zero centered @ -41dBm
                                 * input signal.
                                 */
                                if (rx_status.rate_idx > 3) {
                                        signal = (s8)((flags3 >> 16) & 0xff);
                                        signal = signal / 2 - 41;
                                } else {
                                        int idx, bb;

                                        idx = (agc & 0x60) >> 5;
                                        bb = (agc & 0x1F) * 2;
                                        /* bias + BB gain + LNA gain */
                                        signal = 4 - bb - rtl8187se_lna_gain[idx];
                                }
                                break;
                        }
                        rx_status.signal = signal;
                        rx_status.freq = dev->conf.chandef.chan->center_freq;
                        rx_status.band = dev->conf.chandef.chan->band;
                        rx_status.mactime = tsft;
                        rx_status.flag |= RX_FLAG_MACTIME_START;
                        if (flags & RTL818X_RX_DESC_FLAG_SPLCP)
                                rx_status.flag |= RX_FLAG_SHORTPRE;
                        if (flags & RTL818X_RX_DESC_FLAG_CRC32_ERR)
                                rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;

                        memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
                        ieee80211_rx_irqsafe(dev, skb);

                        skb = new_skb;
                        priv->rx_buf[priv->rx_idx] = skb;
                        *((dma_addr_t *) skb->cb) = mapping;
                }

        done:
                cmd_desc = entry;
                cmd_desc->rx_buf = cpu_to_le32(*((dma_addr_t *)skb->cb));
                cmd_desc->flags = cpu_to_le32(RTL818X_RX_DESC_FLAG_OWN |
                                           MAX_RX_SIZE);
                if (priv->rx_idx == 31)
                        cmd_desc->flags |=
                                cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
                priv->rx_idx = (priv->rx_idx + 1) % 32;
        }
}

static void rtl8180_handle_tx(struct ieee80211_hw *dev, unsigned int prio)
{
        struct rtl8180_priv *priv = dev->priv;
        struct rtl8180_tx_ring *ring = &priv->tx_ring[prio];

        while (skb_queue_len(&ring->queue)) {
                struct rtl8180_tx_desc *entry = &ring->desc[ring->idx];
                struct sk_buff *skb;
                struct ieee80211_tx_info *info;
                u32 flags = le32_to_cpu(entry->flags);

                if (flags & RTL818X_TX_DESC_FLAG_OWN)
                        return;

                ring->idx = (ring->idx + 1) % ring->entries;
                skb = __skb_dequeue(&ring->queue);
                pci_unmap_single(priv->pdev, le32_to_cpu(entry->tx_buf),
                                 skb->len, PCI_DMA_TODEVICE);

                info = IEEE80211_SKB_CB(skb);
                ieee80211_tx_info_clear_status(info);

                if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
                    (flags & RTL818X_TX_DESC_FLAG_TX_OK))
                        info->flags |= IEEE80211_TX_STAT_ACK;

                info->status.rates[0].count = (flags & 0xFF) + 1;

                ieee80211_tx_status_irqsafe(dev, skb);
                if (ring->entries - skb_queue_len(&ring->queue) == 2)
                        ieee80211_wake_queue(dev, prio);
        }
}

static irqreturn_t rtl8187se_interrupt(int irq, void *dev_id)
{
        struct ieee80211_hw *dev = dev_id;
        struct rtl8180_priv *priv = dev->priv;
        u32 reg;
        unsigned long flags;
        static int desc_err;

        spin_lock_irqsave(&priv->lock, flags);
        /* Note: 32-bit interrupt status */
        reg = rtl818x_ioread32(priv, &priv->map->INT_STATUS_SE);
        if (unlikely(reg == 0xFFFFFFFF)) {
                spin_unlock_irqrestore(&priv->lock, flags);
                return IRQ_HANDLED;
        }

        rtl818x_iowrite32(priv, &priv->map->INT_STATUS_SE, reg);

        if (reg & IMR_TIMEOUT1)
                rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);

        if (reg & (IMR_TBDOK | IMR_TBDER))
                rtl8180_handle_tx(dev, 4);

        if (reg & (IMR_TVODOK | IMR_TVODER))
                rtl8180_handle_tx(dev, 0);

        if (reg & (IMR_TVIDOK | IMR_TVIDER))
                rtl8180_handle_tx(dev, 1);

        if (reg & (IMR_TBEDOK | IMR_TBEDER))
                rtl8180_handle_tx(dev, 2);

        if (reg & (IMR_TBKDOK | IMR_TBKDER))
                rtl8180_handle_tx(dev, 3);

        if (reg & (IMR_ROK | IMR_RER | RTL818X_INT_SE_RX_DU | IMR_RQOSOK))
                rtl8180_handle_rx(dev);
        /* The interface sometimes generates several RX DMA descriptor errors
         * at startup. Do not report these.
         */
        if ((reg & RTL818X_INT_SE_RX_DU) && desc_err++ > 2)
                if (net_ratelimit())
                        wiphy_err(dev->wiphy, "No RX DMA Descriptor avail\n");

        spin_unlock_irqrestore(&priv->lock, flags);
        return IRQ_HANDLED;
}

static irqreturn_t rtl8180_interrupt(int irq, void *dev_id)
{
        struct ieee80211_hw *dev = dev_id;
        struct rtl8180_priv *priv = dev->priv;
        u16 reg;

        spin_lock(&priv->lock);
        reg = rtl818x_ioread16(priv, &priv->map->INT_STATUS);
        if (unlikely(reg == 0xFFFF)) {
                spin_unlock(&priv->lock);
                return IRQ_HANDLED;
        }

        rtl818x_iowrite16(priv, &priv->map->INT_STATUS, reg);

        if (reg & (RTL818X_INT_TXB_OK | RTL818X_INT_TXB_ERR))
                rtl8180_handle_tx(dev, 1);

        if (reg & (RTL818X_INT_TXL_OK | RTL818X_INT_TXL_ERR))
                rtl8180_handle_tx(dev, 0);

        if (reg & (RTL818X_INT_RX_OK | RTL818X_INT_RX_ERR))
                rtl8180_handle_rx(dev);

        spin_unlock(&priv->lock);

        return IRQ_HANDLED;
}

static void rtl8180_tx(struct ieee80211_hw *dev,
                       struct ieee80211_tx_control *control,
                       struct sk_buff *skb)
{
        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
        struct rtl8180_priv *priv = dev->priv;
        struct rtl8180_tx_ring *ring;
        struct rtl8180_tx_desc *entry;
        unsigned long flags;
        unsigned int idx, prio, hw_prio;
        dma_addr_t mapping;
        u32 tx_flags;
        u8 rc_flags;
        u16 plcp_len = 0;
        __le16 rts_duration = 0;
        /* do arithmetic and then convert to le16 */
        u16 frame_duration = 0;

        prio = skb_get_queue_mapping(skb);
        ring = &priv->tx_ring[prio];

        mapping = pci_map_single(priv->pdev, skb->data,
                                 skb->len, PCI_DMA_TODEVICE);

        if (pci_dma_mapping_error(priv->pdev, mapping)) {
                kfree_skb(skb);
                dev_err(&priv->pdev->dev, "TX DMA mapping error\n");
                return;
        }

        tx_flags = RTL818X_TX_DESC_FLAG_OWN | RTL818X_TX_DESC_FLAG_FS |
                   RTL818X_TX_DESC_FLAG_LS |
                   (ieee80211_get_tx_rate(dev, info)->hw_value << 24) |
                   skb->len;

        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180)
                tx_flags |= RTL818X_TX_DESC_FLAG_DMA |
                            RTL818X_TX_DESC_FLAG_NO_ENC;

        rc_flags = info->control.rates[0].flags;

        /* HW will perform RTS-CTS when only RTS flags is set.
         * HW will perform CTS-to-self when both RTS and CTS flags are set.
         * RTS rate and RTS duration will be used also for CTS-to-self.
         */
        if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
                tx_flags |= RTL818X_TX_DESC_FLAG_RTS;
                tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
                rts_duration = ieee80211_rts_duration(dev, priv->vif,
                                                skb->len, info);
        } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
                tx_flags |= RTL818X_TX_DESC_FLAG_RTS | RTL818X_TX_DESC_FLAG_CTS;
                tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
                rts_duration = ieee80211_ctstoself_duration(dev, priv->vif,
                                                skb->len, info);
        }

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180) {
                unsigned int remainder;

                plcp_len = DIV_ROUND_UP(16 * (skb->len + 4),
                                (ieee80211_get_tx_rate(dev, info)->bitrate * 2) / 10);
                remainder = (16 * (skb->len + 4)) %
                            ((ieee80211_get_tx_rate(dev, info)->bitrate * 2) / 10);
                if (remainder <= 6)
                        plcp_len |= 1 << 15;
        }

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                __le16 duration;
                /* SIFS time (required by HW) is already included by
                 * ieee80211_generic_frame_duration
                 */
                duration = ieee80211_generic_frame_duration(dev, priv->vif,
                                        IEEE80211_BAND_2GHZ, skb->len,
                                        ieee80211_get_tx_rate(dev, info));

                frame_duration =  priv->ack_time + le16_to_cpu(duration);
        }

        spin_lock_irqsave(&priv->lock, flags);

        if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
                if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
                        priv->seqno += 0x10;
                hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
                hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
        }

        idx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries;
        entry = &ring->desc[idx];

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                entry->frame_duration = cpu_to_le16(frame_duration);
                entry->frame_len_se = cpu_to_le16(skb->len);

                /* tpc polarity */
                entry->flags3 = cpu_to_le16(1<<4);
        } else
                entry->frame_len = cpu_to_le32(skb->len);

        entry->rts_duration = rts_duration;
        entry->plcp_len = cpu_to_le16(plcp_len);
        entry->tx_buf = cpu_to_le32(mapping);

        entry->retry_limit = info->control.rates[0].count - 1;

        /* We must be sure that tx_flags is written last because the HW
         * looks at it to check if the rest of data is valid or not
         */
        wmb();
        entry->flags = cpu_to_le32(tx_flags);
        /* We must be sure this has been written before followings HW
         * register write, because this write will made the HW attempts
         * to DMA the just-written data
         */
        wmb();

        __skb_queue_tail(&ring->queue, skb);
        if (ring->entries - skb_queue_len(&ring->queue) < 2)
                ieee80211_stop_queue(dev, prio);

        spin_unlock_irqrestore(&priv->lock, flags);

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                /* just poll: rings are stopped with TPPollStop reg */
                hw_prio = rtl8187se_queues_map[prio];
                rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING,
                         (1 << hw_prio));
        } else {
                hw_prio = rtl8180_queues_map[prio];
                rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING,
                         (1 << hw_prio) | /* ring to poll  */
                         (1<<1) | (1<<2));/* stopped rings */
        }
}

static void rtl8180_set_anaparam3(struct rtl8180_priv *priv, u16 anaparam3)
{
        u8 reg;

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
                         RTL818X_EEPROM_CMD_CONFIG);

        reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
        rtl818x_iowrite8(priv, &priv->map->CONFIG3,
                 reg | RTL818X_CONFIG3_ANAPARAM_WRITE);

        rtl818x_iowrite16(priv, &priv->map->ANAPARAM3, anaparam3);

        rtl818x_iowrite8(priv, &priv->map->CONFIG3,
                 reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
                         RTL818X_EEPROM_CMD_NORMAL);
}

void rtl8180_set_anaparam2(struct rtl8180_priv *priv, u32 anaparam2)
{
        u8 reg;

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
                         RTL818X_EEPROM_CMD_CONFIG);

        reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
        rtl818x_iowrite8(priv, &priv->map->CONFIG3,
                 reg | RTL818X_CONFIG3_ANAPARAM_WRITE);

        rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, anaparam2);

        rtl818x_iowrite8(priv, &priv->map->CONFIG3,
                 reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
                         RTL818X_EEPROM_CMD_NORMAL);
}

void rtl8180_set_anaparam(struct rtl8180_priv *priv, u32 anaparam)
{
        u8 reg;

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
        reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
        rtl818x_iowrite8(priv, &priv->map->CONFIG3,
                 reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
        rtl818x_iowrite32(priv, &priv->map->ANAPARAM, anaparam);
        rtl818x_iowrite8(priv, &priv->map->CONFIG3,
                 reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
}

static void rtl8187se_mac_config(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;
        u8 reg;

        rtl818x_iowrite32(priv, REG_ADDR4(0x1F0), 0);
        rtl818x_ioread32(priv, REG_ADDR4(0x1F0));
        rtl818x_iowrite32(priv, REG_ADDR4(0x1F4), 0);
        rtl818x_ioread32(priv, REG_ADDR4(0x1F4));
        rtl818x_iowrite8(priv, REG_ADDR1(0x1F8), 0);
        rtl818x_ioread8(priv, REG_ADDR1(0x1F8));
        /* Enable DA10 TX power saving */
        reg = rtl818x_ioread8(priv, &priv->map->PHY_PR);
        rtl818x_iowrite8(priv, &priv->map->PHY_PR, reg | 0x04);
        /* Power */
        rtl818x_iowrite16(priv, PI_DATA_REG, 0x1000);
        rtl818x_iowrite16(priv, SI_DATA_REG, 0x1000);
        /* AFE - default to power ON */
        rtl818x_iowrite16(priv, REG_ADDR2(0x370), 0x0560);
        rtl818x_iowrite16(priv, REG_ADDR2(0x372), 0x0560);
        rtl818x_iowrite16(priv, REG_ADDR2(0x374), 0x0DA4);
        rtl818x_iowrite16(priv, REG_ADDR2(0x376), 0x0DA4);
        rtl818x_iowrite16(priv, REG_ADDR2(0x378), 0x0560);
        rtl818x_iowrite16(priv, REG_ADDR2(0x37A), 0x0560);
        rtl818x_iowrite16(priv, REG_ADDR2(0x37C), 0x00EC);
        rtl818x_iowrite16(priv, REG_ADDR2(0x37E), 0x00EC);
        rtl818x_iowrite8(priv, REG_ADDR1(0x24E), 0x01);
        /* unknown, needed for suspend to RAM resume */
        rtl818x_iowrite8(priv, REG_ADDR1(0x0A), 0x72);
}

static void rtl8187se_set_antenna_config(struct ieee80211_hw *dev, u8 def_ant,
                                         bool diversity)
{
        struct rtl8180_priv *priv = dev->priv;

        rtl8225_write_phy_cck(dev, 0x0C, 0x09);
        if (diversity) {
                if (def_ant == 1) {
                        rtl818x_iowrite8(priv, &priv->map->TX_ANTENNA, 0x00);
                        rtl8225_write_phy_cck(dev, 0x11, 0xBB);
                        rtl8225_write_phy_cck(dev, 0x01, 0xC7);
                        rtl8225_write_phy_ofdm(dev, 0x0D, 0x54);
                        rtl8225_write_phy_ofdm(dev, 0x18, 0xB2);
                } else { /* main antenna */
                        rtl818x_iowrite8(priv, &priv->map->TX_ANTENNA, 0x03);
                        rtl8225_write_phy_cck(dev, 0x11, 0x9B);
                        rtl8225_write_phy_cck(dev, 0x01, 0xC7);
                        rtl8225_write_phy_ofdm(dev, 0x0D, 0x5C);
                        rtl8225_write_phy_ofdm(dev, 0x18, 0xB2);
                }
        } else { /* disable antenna diversity */
                if (def_ant == 1) {
                        rtl818x_iowrite8(priv, &priv->map->TX_ANTENNA, 0x00);
                        rtl8225_write_phy_cck(dev, 0x11, 0xBB);
                        rtl8225_write_phy_cck(dev, 0x01, 0x47);
                        rtl8225_write_phy_ofdm(dev, 0x0D, 0x54);
                        rtl8225_write_phy_ofdm(dev, 0x18, 0x32);
                } else { /* main antenna */
                        rtl818x_iowrite8(priv, &priv->map->TX_ANTENNA, 0x03);
                        rtl8225_write_phy_cck(dev, 0x11, 0x9B);
                        rtl8225_write_phy_cck(dev, 0x01, 0x47);
                        rtl8225_write_phy_ofdm(dev, 0x0D, 0x5C);
                        rtl8225_write_phy_ofdm(dev, 0x18, 0x32);
                }
        }
        /* priv->curr_ant = def_ant; */
}

static void rtl8180_int_enable(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                rtl818x_iowrite32(priv, &priv->map->IMR,
                          IMR_TBDER | IMR_TBDOK |
                          IMR_TVODER | IMR_TVODOK |
                          IMR_TVIDER | IMR_TVIDOK |
                          IMR_TBEDER | IMR_TBEDOK |
                          IMR_TBKDER | IMR_TBKDOK |
                          IMR_RDU | IMR_RER |
                          IMR_ROK | IMR_RQOSOK);
        } else {
                rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
        }
}

static void rtl8180_int_disable(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                rtl818x_iowrite32(priv, &priv->map->IMR, 0);
        } else {
                rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
        }
}

static void rtl8180_conf_basic_rates(struct ieee80211_hw *dev,
                            u32 basic_mask)
{
        struct rtl8180_priv *priv = dev->priv;
        u16 reg;
        u32 resp_mask;
        u8 basic_max;
        u8 resp_max, resp_min;

        resp_mask = basic_mask;
        /* IEEE80211 says the response rate should be equal to the highest basic
         * rate that is not faster than received frame. But it says also that if
         * the basic rate set does not contains any rate for the current
         * modulation class then mandatory rate set must be used for that
         * modulation class. Eventually add OFDM mandatory rates..
         */
        if ((resp_mask & 0xf) == resp_mask)
                resp_mask |= 0x150; /* 6, 12, 24Mbps */

        switch (priv->chip_family) {

        case RTL818X_CHIP_FAMILY_RTL8180:
                /* in 8180 this is NOT a BITMAP */
                basic_max = fls(basic_mask) - 1;
                reg = rtl818x_ioread16(priv, &priv->map->BRSR);
                reg &= ~3;
                reg |= basic_max;
                rtl818x_iowrite16(priv, &priv->map->BRSR, reg);
                break;

        case RTL818X_CHIP_FAMILY_RTL8185:
                resp_max = fls(resp_mask) - 1;
                resp_min = ffs(resp_mask) - 1;
                /* in 8185 this is a BITMAP */
                rtl818x_iowrite16(priv, &priv->map->BRSR, basic_mask);
                rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (resp_max << 4) |
                                resp_min);
                break;

        case RTL818X_CHIP_FAMILY_RTL8187SE:
                /* in 8187se this is a BITMAP. BRSR reg actually sets
                 * response rates.
                 */
                rtl818x_iowrite16(priv, &priv->map->BRSR_8187SE, resp_mask);
                break;
        }
}

static void rtl8180_config_cardbus(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;
        u16 reg16;
        u8 reg8;

        reg8 = rtl818x_ioread8(priv, &priv->map->CONFIG3);
        reg8 |= 1 << 1;
        rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg8);

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                rtl818x_iowrite16(priv, FEMR_SE, 0xffff);
        } else {
                reg16 = rtl818x_ioread16(priv, &priv->map->FEMR);
                        reg16 |= (1 << 15) | (1 << 14) | (1 << 4);
                rtl818x_iowrite16(priv, &priv->map->FEMR, reg16);
        }

}

static int rtl8180_init_hw(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;
        u16 reg;
        u32 reg32;

        rtl818x_iowrite8(priv, &priv->map->CMD, 0);
        rtl818x_ioread8(priv, &priv->map->CMD);
        msleep(10);

        /* reset */
        rtl8180_int_disable(dev);
        rtl818x_ioread8(priv, &priv->map->CMD);

        reg = rtl818x_ioread8(priv, &priv->map->CMD);
        reg &= (1 << 1);
        reg |= RTL818X_CMD_RESET;
        rtl818x_iowrite8(priv, &priv->map->CMD, RTL818X_CMD_RESET);
        rtl818x_ioread8(priv, &priv->map->CMD);
        msleep(200);

        /* check success of reset */
        if (rtl818x_ioread8(priv, &priv->map->CMD) & RTL818X_CMD_RESET) {
                wiphy_err(dev->wiphy, "reset timeout!\n");
                return -ETIMEDOUT;
        }

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
        rtl818x_ioread8(priv, &priv->map->CMD);
        msleep(200);

        if (rtl818x_ioread8(priv, &priv->map->CONFIG3) & (1 << 3)) {
                rtl8180_config_cardbus(dev);
        }

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_ENEDCA);
        else
                rtl818x_iowrite8(priv, &priv->map->MSR, 0);

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
                rtl8180_set_anaparam(priv, priv->anaparam);

        rtl818x_iowrite32(priv, &priv->map->RDSAR, priv->rx_ring_dma);
        /* mac80211 queue have higher prio for lower index. The last queue
         * (that mac80211 is not aware of) is reserved for beacons (and have
         * the highest priority on the NIC)
         */
        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8187SE) {
                rtl818x_iowrite32(priv, &priv->map->TBDA,
                                  priv->tx_ring[1].dma);
                rtl818x_iowrite32(priv, &priv->map->TLPDA,
                                  priv->tx_ring[0].dma);
        } else {
                rtl818x_iowrite32(priv, &priv->map->TBDA,
                                  priv->tx_ring[4].dma);
                rtl818x_iowrite32(priv, &priv->map->TVODA,
                                  priv->tx_ring[0].dma);
                rtl818x_iowrite32(priv, &priv->map->TVIDA,
                                  priv->tx_ring[1].dma);
                rtl818x_iowrite32(priv, &priv->map->TBEDA,
                                  priv->tx_ring[2].dma);
                rtl818x_iowrite32(priv, &priv->map->TBKDA,
                                  priv->tx_ring[3].dma);
        }

        /* TODO: necessary? specs indicate not */
        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
        reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
        rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg & ~(1 << 3));
        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
                reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
                rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg | (1 << 4));
        }
        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

        /* TODO: set CONFIG5 for calibrating AGC on rtl8180 + philips radio? */

        /* TODO: turn off hw wep on rtl8180 */

        rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);

        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
                rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
                rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0);
        } else {
                rtl818x_iowrite8(priv, &priv->map->SECURITY, 0);

                rtl818x_iowrite8(priv, &priv->map->PHY_DELAY, 0x6);
                rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER, 0x4C);
        }

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
                /* TODO: set ClkRun enable? necessary? */
                reg = rtl818x_ioread8(priv, &priv->map->GP_ENABLE);
                rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, reg & ~(1 << 6));
                rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
                reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
                rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | (1 << 2));
                rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
                /* fix eccessive IFS after CTS-to-self */
                if (priv->map_pio) {
                        u8 reg;

                        reg = rtl818x_ioread8(priv, &priv->map->PGSELECT);
                        rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
                        rtl818x_iowrite8(priv, REG_ADDR1(0xff), 0x35);
                        rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
                } else
                        rtl818x_iowrite8(priv, REG_ADDR1(0x1ff), 0x35);
        }

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {

                /* the set auto rate fallback bitmask from 1M to 54 Mb/s */
                rtl818x_iowrite16(priv, ARFR, 0xFFF);
                rtl818x_ioread16(priv, ARFR);

                /* stop unused queus (no dma alloc) */
                rtl818x_iowrite8(priv, &priv->map->TPPOLL_STOP,
                               RTL818x_TPPOLL_STOP_MG | RTL818x_TPPOLL_STOP_HI);

                rtl818x_iowrite8(priv, &priv->map->ACM_CONTROL, 0x00);
                rtl818x_iowrite16(priv, &priv->map->TID_AC_MAP, 0xFA50);

                rtl818x_iowrite16(priv, &priv->map->INT_MIG, 0);

                /* some black magic here.. */
                rtl8187se_mac_config(dev);

                rtl818x_iowrite16(priv, RFSW_CTRL, 0x569A);
                rtl818x_ioread16(priv, RFSW_CTRL);

                rtl8180_set_anaparam(priv, RTL8225SE_ANAPARAM_ON);
                rtl8180_set_anaparam2(priv, RTL8225SE_ANAPARAM2_ON);
                rtl8180_set_anaparam3(priv, RTL8225SE_ANAPARAM3);


                rtl818x_iowrite8(priv, &priv->map->CONFIG5,
                            rtl818x_ioread8(priv, &priv->map->CONFIG5) & 0x7F);

                /*probably this switch led on */
                rtl818x_iowrite8(priv, &priv->map->PGSELECT,
                            rtl818x_ioread8(priv, &priv->map->PGSELECT) | 0x08);

                rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x0480);
                rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1BFF);
                rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x2488);

                rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x4003);

                /* the reference code mac hardcode table write
                 * this reg by doing byte-wide accesses.
                 * It does it just for lowest and highest byte..
                 */
                reg32 = rtl818x_ioread32(priv, &priv->map->RF_PARA);
                reg32 &= 0x00ffff00;
                reg32 |= 0xb8000054;
                rtl818x_iowrite32(priv, &priv->map->RF_PARA, reg32);
        } else
                /* stop unused queus (no dma alloc) */
                rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING,
                            (1<<1) | (1<<2));

        priv->rf->init(dev);

        /* default basic rates are 1,2 Mbps for rtl8180. 1,2,6,9,12,18,24 Mbps
         * otherwise. bitmask 0x3 and 0x01f3 respectively.
         * NOTE: currenty rtl8225 RF code changes basic rates, so we need to do
         * this after rf init.
         * TODO: try to find out whether RF code really needs to do this..
         */
        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
                rtl8180_conf_basic_rates(dev, 0x3);
        else
                rtl8180_conf_basic_rates(dev, 0x1f3);

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                rtl8187se_set_antenna_config(dev,
                                             priv->antenna_diversity_default,
                                             priv->antenna_diversity_en);
        return 0;
}

static int rtl8180_init_rx_ring(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;
        struct rtl818x_rx_cmd_desc *entry;
        int i;

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                priv->rx_ring_sz = sizeof(struct rtl8187se_rx_desc);
        else
                priv->rx_ring_sz = sizeof(struct rtl8180_rx_desc);

        priv->rx_ring = pci_zalloc_consistent(priv->pdev, priv->rx_ring_sz * 32,
                                              &priv->rx_ring_dma);
        if (!priv->rx_ring || (unsigned long)priv->rx_ring & 0xFF) {
                wiphy_err(dev->wiphy, "Cannot allocate RX ring\n");
                return -ENOMEM;
        }

        priv->rx_idx = 0;

        for (i = 0; i < 32; i++) {
                struct sk_buff *skb = dev_alloc_skb(MAX_RX_SIZE);
                dma_addr_t *mapping;
                entry = priv->rx_ring + priv->rx_ring_sz*i;
                if (!skb) {
                        wiphy_err(dev->wiphy, "Cannot allocate RX skb\n");
                        return -ENOMEM;
                }
                priv->rx_buf[i] = skb;
                mapping = (dma_addr_t *)skb->cb;
                *mapping = pci_map_single(priv->pdev, skb_tail_pointer(skb),
                                          MAX_RX_SIZE, PCI_DMA_FROMDEVICE);

                if (pci_dma_mapping_error(priv->pdev, *mapping)) {
                        kfree_skb(skb);
                        wiphy_err(dev->wiphy, "Cannot map DMA for RX skb\n");
                        return -ENOMEM;
                }

                entry->rx_buf = cpu_to_le32(*mapping);
                entry->flags = cpu_to_le32(RTL818X_RX_DESC_FLAG_OWN |
                                           MAX_RX_SIZE);
        }
        entry->flags |= cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
        return 0;
}

static void rtl8180_free_rx_ring(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;
        int i;

        for (i = 0; i < 32; i++) {
                struct sk_buff *skb = priv->rx_buf[i];
                if (!skb)
                        continue;

                pci_unmap_single(priv->pdev,
                                 *((dma_addr_t *)skb->cb),
                                 MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
                kfree_skb(skb);
        }

        pci_free_consistent(priv->pdev, priv->rx_ring_sz * 32,
                            priv->rx_ring, priv->rx_ring_dma);
        priv->rx_ring = NULL;
}

static int rtl8180_init_tx_ring(struct ieee80211_hw *dev,
                                unsigned int prio, unsigned int entries)
{
        struct rtl8180_priv *priv = dev->priv;
        struct rtl8180_tx_desc *ring;
        dma_addr_t dma;
        int i;

        ring = pci_zalloc_consistent(priv->pdev, sizeof(*ring) * entries,
                                     &dma);
        if (!ring || (unsigned long)ring & 0xFF) {
                wiphy_err(dev->wiphy, "Cannot allocate TX ring (prio = %d)\n",
                          prio);
                return -ENOMEM;
        }

        priv->tx_ring[prio].desc = ring;
        priv->tx_ring[prio].dma = dma;
        priv->tx_ring[prio].idx = 0;
        priv->tx_ring[prio].entries = entries;
        skb_queue_head_init(&priv->tx_ring[prio].queue);

        for (i = 0; i < entries; i++)
                ring[i].next_tx_desc =
                        cpu_to_le32((u32)dma + ((i + 1) % entries) * sizeof(*ring));

        return 0;
}

static void rtl8180_free_tx_ring(struct ieee80211_hw *dev, unsigned int prio)
{
        struct rtl8180_priv *priv = dev->priv;
        struct rtl8180_tx_ring *ring = &priv->tx_ring[prio];

        while (skb_queue_len(&ring->queue)) {
                struct rtl8180_tx_desc *entry = &ring->desc[ring->idx];
                struct sk_buff *skb = __skb_dequeue(&ring->queue);

                pci_unmap_single(priv->pdev, le32_to_cpu(entry->tx_buf),
                                 skb->len, PCI_DMA_TODEVICE);
                kfree_skb(skb);
                ring->idx = (ring->idx + 1) % ring->entries;
        }

        pci_free_consistent(priv->pdev, sizeof(*ring->desc)*ring->entries,
                            ring->desc, ring->dma);
        ring->desc = NULL;
}

static int rtl8180_start(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;
        int ret, i;
        u32 reg;

        ret = rtl8180_init_rx_ring(dev);
        if (ret)
                return ret;

        for (i = 0; i < (dev->queues + 1); i++)
                if ((ret = rtl8180_init_tx_ring(dev, i, 16)))
                        goto err_free_rings;

        ret = rtl8180_init_hw(dev);
        if (ret)
                goto err_free_rings;

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                ret = request_irq(priv->pdev->irq, rtl8187se_interrupt,
                          IRQF_SHARED, KBUILD_MODNAME, dev);
        } else {
                ret = request_irq(priv->pdev->irq, rtl8180_interrupt,
                          IRQF_SHARED, KBUILD_MODNAME, dev);
        }

        if (ret) {
                wiphy_err(dev->wiphy, "failed to register IRQ handler\n");
                goto err_free_rings;
        }

        rtl8180_int_enable(dev);

        /* in rtl8187se at MAR regs offset there is the management
         * TX descriptor DMA addres..
         */
        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8187SE) {
                rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
                rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);
        }

        reg = RTL818X_RX_CONF_ONLYERLPKT |
              RTL818X_RX_CONF_RX_AUTORESETPHY |
              RTL818X_RX_CONF_MGMT |
              RTL818X_RX_CONF_DATA |
              (7 << 8 /* MAX RX DMA */) |
              RTL818X_RX_CONF_BROADCAST |
              RTL818X_RX_CONF_NICMAC;

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185)
                reg |= RTL818X_RX_CONF_CSDM1 | RTL818X_RX_CONF_CSDM2;
        else if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180) {
                reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE1)
                        ? RTL818X_RX_CONF_CSDM1 : 0;
                reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE2)
                        ? RTL818X_RX_CONF_CSDM2 : 0;
        } else {
                reg &= ~(RTL818X_RX_CONF_CSDM1 | RTL818X_RX_CONF_CSDM2);
        }

        priv->rx_conf = reg;
        rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);

        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
                reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);

                /* CW is not on per-packet basis.
                 * in rtl8185 the CW_VALUE reg is used.
                 * in rtl8187se the AC param regs are used.
                 */
                reg &= ~RTL818X_CW_CONF_PERPACKET_CW;
                /* retry limit IS on per-packet basis.
                 * the short and long retry limit in TX_CONF
                 * reg are ignored
                 */
                reg |= RTL818X_CW_CONF_PERPACKET_RETRY;
                rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);

                reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
                /* TX antenna and TX gain are not on per-packet basis.
                 * TX Antenna is selected by ANTSEL reg (RX in BB regs).
                 * TX gain is selected with CCK_TX_AGC and OFDM_TX_AGC regs
                 */
                reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN;
                reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL;
                reg |=  RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
                rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);

                /* disable early TX */
                rtl818x_iowrite8(priv, (u8 __iomem *)priv->map + 0xec, 0x3f);
        }

        reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
        reg |= (6 << 21 /* MAX TX DMA */) |
               RTL818X_TX_CONF_NO_ICV;

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                reg |= 1<<30;  /*  "duration procedure mode" */

        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180)
                reg &= ~RTL818X_TX_CONF_PROBE_DTS;
        else
                reg &= ~RTL818X_TX_CONF_HW_SEQNUM;

        reg &= ~RTL818X_TX_CONF_DISCW;

        /* different meaning, same value on both rtl8185 and rtl8180 */
        reg &= ~RTL818X_TX_CONF_SAT_HWPLCP;

        rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);

        reg = rtl818x_ioread8(priv, &priv->map->CMD);
        reg |= RTL818X_CMD_RX_ENABLE;
        reg |= RTL818X_CMD_TX_ENABLE;
        rtl818x_iowrite8(priv, &priv->map->CMD, reg);

        return 0;

 err_free_rings:
        rtl8180_free_rx_ring(dev);
        for (i = 0; i < (dev->queues + 1); i++)
                if (priv->tx_ring[i].desc)
                        rtl8180_free_tx_ring(dev, i);

        return ret;
}

static void rtl8180_stop(struct ieee80211_hw *dev)
{
        struct rtl8180_priv *priv = dev->priv;
        u8 reg;
        int i;

        rtl8180_int_disable(dev);

        reg = rtl818x_ioread8(priv, &priv->map->CMD);
        reg &= ~RTL818X_CMD_TX_ENABLE;
        reg &= ~RTL818X_CMD_RX_ENABLE;
        rtl818x_iowrite8(priv, &priv->map->CMD, reg);

        priv->rf->stop(dev);

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
        reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
        rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

        free_irq(priv->pdev->irq, dev);

        rtl8180_free_rx_ring(dev);
        for (i = 0; i < (dev->queues + 1); i++)
                rtl8180_free_tx_ring(dev, i);
}

static u64 rtl8180_get_tsf(struct ieee80211_hw *dev,
                           struct ieee80211_vif *vif)
{
        struct rtl8180_priv *priv = dev->priv;

        return rtl818x_ioread32(priv, &priv->map->TSFT[0]) |
               (u64)(rtl818x_ioread32(priv, &priv->map->TSFT[1])) << 32;
}

static void rtl8180_beacon_work(struct work_struct *work)
{
        struct rtl8180_vif *vif_priv =
                container_of(work, struct rtl8180_vif, beacon_work.work);
        struct ieee80211_vif *vif =
                container_of((void *)vif_priv, struct ieee80211_vif, drv_priv);
        struct ieee80211_hw *dev = vif_priv->dev;
        struct ieee80211_mgmt *mgmt;
        struct sk_buff *skb;

        /* don't overflow the tx ring */
        if (ieee80211_queue_stopped(dev, 0))
                goto resched;

        /* grab a fresh beacon */
        skb = ieee80211_beacon_get(dev, vif);
        if (!skb)
                goto resched;

        /*
         * update beacon timestamp w/ TSF value
         * TODO: make hardware update beacon timestamp
         */
        mgmt = (struct ieee80211_mgmt *)skb->data;
        mgmt->u.beacon.timestamp = cpu_to_le64(rtl8180_get_tsf(dev, vif));

        /* TODO: use actual beacon queue */
        skb_set_queue_mapping(skb, 0);

        rtl8180_tx(dev, NULL, skb);

resched:
        /*
         * schedule next beacon
         * TODO: use hardware support for beacon timing
         */
        schedule_delayed_work(&vif_priv->beacon_work,
                        usecs_to_jiffies(1024 * vif->bss_conf.beacon_int));
}

static int rtl8180_add_interface(struct ieee80211_hw *dev,
                                 struct ieee80211_vif *vif)
{
        struct rtl8180_priv *priv = dev->priv;
        struct rtl8180_vif *vif_priv;

        /*
         * We only support one active interface at a time.
         */
        if (priv->vif)
                return -EBUSY;

        switch (vif->type) {
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_ADHOC:
                break;
        default:
                return -EOPNOTSUPP;
        }

        priv->vif = vif;

        /* Initialize driver private area */
        vif_priv = (struct rtl8180_vif *)&vif->drv_priv;
        vif_priv->dev = dev;
        INIT_DELAYED_WORK(&vif_priv->beacon_work, rtl8180_beacon_work);
        vif_priv->enable_beacon = false;

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
        rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->MAC[0],
                          le32_to_cpu(*(__le32 *)vif->addr));
        rtl818x_iowrite16(priv, (__le16 __iomem *)&priv->map->MAC[4],
                          le16_to_cpu(*(__le16 *)(vif->addr + 4)));
        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

        return 0;
}

static void rtl8180_remove_interface(struct ieee80211_hw *dev,
                                     struct ieee80211_vif *vif)
{
        struct rtl8180_priv *priv = dev->priv;
        priv->vif = NULL;
}

static int rtl8180_config(struct ieee80211_hw *dev, u32 changed)
{
        struct rtl8180_priv *priv = dev->priv;
        struct ieee80211_conf *conf = &dev->conf;

        priv->rf->set_chan(dev, conf);

        return 0;
}

static void rtl8187se_conf_ac_parm(struct ieee80211_hw *dev, u8 queue)
{
        const struct ieee80211_tx_queue_params *params;
        struct rtl8180_priv *priv = dev->priv;

        /* hw value */
        u32 ac_param;

        u8 aifs;
        u8 txop;
        u8 cw_min, cw_max;

        params = &priv->queue_param[queue];

        cw_min = fls(params->cw_min);
        cw_max = fls(params->cw_max);

        aifs = 10 + params->aifs * priv->slot_time;

        /* TODO: check if txop HW is in us (mult by 32) */
        txop = params->txop;

        ac_param = txop << AC_PARAM_TXOP_LIMIT_SHIFT |
                cw_max << AC_PARAM_ECW_MAX_SHIFT |
                cw_min << AC_PARAM_ECW_MIN_SHIFT |
                aifs << AC_PARAM_AIFS_SHIFT;

        switch (queue) {
        case IEEE80211_AC_BK:
                rtl818x_iowrite32(priv, &priv->map->AC_BK_PARAM, ac_param);
                break;
        case IEEE80211_AC_BE:
                rtl818x_iowrite32(priv, &priv->map->AC_BE_PARAM, ac_param);
                break;
        case IEEE80211_AC_VI:
                rtl818x_iowrite32(priv, &priv->map->AC_VI_PARAM, ac_param);
                break;
        case IEEE80211_AC_VO:
                rtl818x_iowrite32(priv, &priv->map->AC_VO_PARAM, ac_param);
                break;
        }
}

static int rtl8180_conf_tx(struct ieee80211_hw *dev,
                            struct ieee80211_vif *vif, u16 queue,
                            const struct ieee80211_tx_queue_params *params)
{
        struct rtl8180_priv *priv = dev->priv;
        u8 cw_min, cw_max;

        /* nothing to do ? */
        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
                return 0;

        cw_min = fls(params->cw_min);
        cw_max = fls(params->cw_max);

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                priv->queue_param[queue] = *params;
                rtl8187se_conf_ac_parm(dev, queue);
        } else
                rtl818x_iowrite8(priv, &priv->map->CW_VAL,
                                 (cw_max << 4) | cw_min);
        return 0;
}

static void rtl8180_conf_erp(struct ieee80211_hw *dev,
                            struct ieee80211_bss_conf *info)
{
        struct rtl8180_priv *priv = dev->priv;
        u8 sifs, difs;
        int eifs;
        u8 hw_eifs;

        /* TODO: should we do something ? */
        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
                return;

        /* I _hope_ this means 10uS for the HW.
         * In reference code it is 0x22 for
         * both rtl8187L and rtl8187SE
         */
        sifs = 0x22;

        if (info->use_short_slot)
                priv->slot_time = 9;
        else
                priv->slot_time = 20;

        /* 10 is SIFS time in uS */
        difs = 10 + 2 * priv->slot_time;
        eifs = 10 + difs + priv->ack_time;

        /* HW should use 4uS units for EIFS (I'm sure for rtl8185)*/
        hw_eifs = DIV_ROUND_UP(eifs, 4);


        rtl818x_iowrite8(priv, &priv->map->SLOT, priv->slot_time);
        rtl818x_iowrite8(priv, &priv->map->SIFS, sifs);
        rtl818x_iowrite8(priv, &priv->map->DIFS, difs);

        /* from reference code. set ack timeout reg = eifs reg */
        rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER, hw_eifs);

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                rtl818x_iowrite8(priv, &priv->map->EIFS_8187SE, hw_eifs);
        else if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
                /* rtl8187/rtl8185 HW bug. After EIFS is elapsed,
                 * the HW still wait for DIFS.
                 * HW uses 4uS units for EIFS.
                 */
                hw_eifs = DIV_ROUND_UP(eifs - difs, 4);

                rtl818x_iowrite8(priv, &priv->map->EIFS, hw_eifs);
        }
}

static void rtl8180_bss_info_changed(struct ieee80211_hw *dev,
                                     struct ieee80211_vif *vif,
                                     struct ieee80211_bss_conf *info,
                                     u32 changed)
{
        struct rtl8180_priv *priv = dev->priv;
        struct rtl8180_vif *vif_priv;
        int i;
        u8 reg;

        vif_priv = (struct rtl8180_vif *)&vif->drv_priv;

        if (changed & BSS_CHANGED_BSSID) {
                rtl818x_iowrite16(priv, (__le16 __iomem *)&priv->map->BSSID[0],
                                  le16_to_cpu(*(__le16 *)info->bssid));
                rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->BSSID[2],
                                  le32_to_cpu(*(__le32 *)(info->bssid + 2)));

                if (is_valid_ether_addr(info->bssid)) {
                        if (vif->type == NL80211_IFTYPE_ADHOC)
                                reg = RTL818X_MSR_ADHOC;
                        else
                                reg = RTL818X_MSR_INFRA;
                } else
                        reg = RTL818X_MSR_NO_LINK;

                if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                        reg |= RTL818X_MSR_ENEDCA;

                rtl818x_iowrite8(priv, &priv->map->MSR, reg);
        }

        if (changed & BSS_CHANGED_BASIC_RATES)
                rtl8180_conf_basic_rates(dev, info->basic_rates);

        if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_ERP_PREAMBLE)) {

                /* when preamble changes, acktime duration changes, and erp must
                 * be recalculated. ACK time is calculated at lowest rate.
                 * Since mac80211 include SIFS time we remove it (-10)
                 */
                priv->ack_time =
                        le16_to_cpu(ieee80211_generic_frame_duration(dev,
                                        priv->vif,
                                        IEEE80211_BAND_2GHZ, 10,
                                        &priv->rates[0])) - 10;

                rtl8180_conf_erp(dev, info);

                /* mac80211 supplies aifs_n to driver and calls
                 * conf_tx callback whether aifs_n changes, NOT
                 * when aifs changes.
                 * Aifs should be recalculated if slot changes.
                 */
                if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                        for (i = 0; i < 4; i++)
                                rtl8187se_conf_ac_parm(dev, i);
                }
        }

        if (changed & BSS_CHANGED_BEACON_ENABLED)
                vif_priv->enable_beacon = info->enable_beacon;

        if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON)) {
                cancel_delayed_work_sync(&vif_priv->beacon_work);
                if (vif_priv->enable_beacon)
                        schedule_work(&vif_priv->beacon_work.work);
        }
}

static u64 rtl8180_prepare_multicast(struct ieee80211_hw *dev,
                                     struct netdev_hw_addr_list *mc_list)
{
        return netdev_hw_addr_list_count(mc_list);
}

static void rtl8180_configure_filter(struct ieee80211_hw *dev,
                                     unsigned int changed_flags,
                                     unsigned int *total_flags,
                                     u64 multicast)
{
        struct rtl8180_priv *priv = dev->priv;

        if (changed_flags & FIF_FCSFAIL)
                priv->rx_conf ^= RTL818X_RX_CONF_FCS;
        if (changed_flags & FIF_CONTROL)
                priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
        if (changed_flags & FIF_OTHER_BSS)
                priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
        if (*total_flags & FIF_ALLMULTI || multicast > 0)
                priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
        else
                priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;

        *total_flags = 0;

        if (priv->rx_conf & RTL818X_RX_CONF_FCS)
                *total_flags |= FIF_FCSFAIL;
        if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
                *total_flags |= FIF_CONTROL;
        if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
                *total_flags |= FIF_OTHER_BSS;
        if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
                *total_flags |= FIF_ALLMULTI;

        rtl818x_iowrite32(priv, &priv->map->RX_CONF, priv->rx_conf);
}

static const struct ieee80211_ops rtl8180_ops = {
        .tx                     = rtl8180_tx,
        .start                  = rtl8180_start,
        .stop                   = rtl8180_stop,
        .add_interface          = rtl8180_add_interface,
        .remove_interface       = rtl8180_remove_interface,
        .config                 = rtl8180_config,
        .bss_info_changed       = rtl8180_bss_info_changed,
        .conf_tx                = rtl8180_conf_tx,
        .prepare_multicast      = rtl8180_prepare_multicast,
        .configure_filter       = rtl8180_configure_filter,
        .get_tsf                = rtl8180_get_tsf,
};

static void rtl8180_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
        struct rtl8180_priv *priv = eeprom->data;
        u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);

        eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
        eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
        eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
        eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
}

static void rtl8180_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
        struct rtl8180_priv *priv = eeprom->data;
        u8 reg = 2 << 6;

        if (eeprom->reg_data_in)
                reg |= RTL818X_EEPROM_CMD_WRITE;
        if (eeprom->reg_data_out)
                reg |= RTL818X_EEPROM_CMD_READ;
        if (eeprom->reg_data_clock)
                reg |= RTL818X_EEPROM_CMD_CK;
        if (eeprom->reg_chip_select)
                reg |= RTL818X_EEPROM_CMD_CS;

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
        rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
        udelay(10);
}

static void rtl8180_eeprom_read(struct rtl8180_priv *priv)
{
        struct eeprom_93cx6 eeprom;
        int eeprom_cck_table_adr;
        u16 eeprom_val;
        int i;

        eeprom.data = priv;
        eeprom.register_read = rtl8180_eeprom_register_read;
        eeprom.register_write = rtl8180_eeprom_register_write;
        if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
                eeprom.width = PCI_EEPROM_WIDTH_93C66;
        else
                eeprom.width = PCI_EEPROM_WIDTH_93C46;

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
                        RTL818X_EEPROM_CMD_PROGRAM);
        rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
        udelay(10);

        eeprom_93cx6_read(&eeprom, 0x06, &eeprom_val);
        eeprom_val &= 0xFF;
        priv->rf_type = eeprom_val;

        eeprom_93cx6_read(&eeprom, 0x17, &eeprom_val);
        priv->csthreshold = eeprom_val >> 8;

        eeprom_93cx6_multiread(&eeprom, 0x7, (__le16 *)priv->mac_addr, 3);

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                eeprom_cck_table_adr = 0x30;
        else
                eeprom_cck_table_adr = 0x10;

        /* CCK TX power */
        for (i = 0; i < 14; i += 2) {
                u16 txpwr;
                eeprom_93cx6_read(&eeprom, eeprom_cck_table_adr + (i >> 1),
                                &txpwr);
                priv->channels[i].hw_value = txpwr & 0xFF;
                priv->channels[i + 1].hw_value = txpwr >> 8;
        }

        /* OFDM TX power */
        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
                for (i = 0; i < 14; i += 2) {
                        u16 txpwr;
                        eeprom_93cx6_read(&eeprom, 0x20 + (i >> 1), &txpwr);
                        priv->channels[i].hw_value |= (txpwr & 0xFF) << 8;
                        priv->channels[i + 1].hw_value |= txpwr & 0xFF00;
                }
        }

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180) {
                __le32 anaparam;
                eeprom_93cx6_multiread(&eeprom, 0xD, (__le16 *)&anaparam, 2);
                priv->anaparam = le32_to_cpu(anaparam);
                eeprom_93cx6_read(&eeprom, 0x19, &priv->rfparam);
        }

        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
                eeprom_93cx6_read(&eeprom, 0x3F, &eeprom_val);
                priv->antenna_diversity_en = !!(eeprom_val & 0x100);
                priv->antenna_diversity_default = (eeprom_val & 0xC00) == 0x400;

                eeprom_93cx6_read(&eeprom, 0x7C, &eeprom_val);
                priv->xtal_out = eeprom_val & 0xF;
                priv->xtal_in = (eeprom_val & 0xF0) >> 4;
                priv->xtal_cal = !!(eeprom_val & 0x1000);
                priv->thermal_meter_val = (eeprom_val & 0xF00) >> 8;
                priv->thermal_meter_en = !!(eeprom_val & 0x2000);
        }

        rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
                        RTL818X_EEPROM_CMD_NORMAL);
}

static int rtl8180_probe(struct pci_dev *pdev,
                                   const struct pci_device_id *id)
{
        struct ieee80211_hw *dev;
        struct rtl8180_priv *priv;
        unsigned long mem_addr, mem_len;
        unsigned int io_addr, io_len;
        int err;
        const char *chip_name, *rf_name = NULL;
        u32 reg;

        err = pci_enable_device(pdev);
        if (err) {
                printk(KERN_ERR "%s (rtl8180): Cannot enable new PCI device\n",
                       pci_name(pdev));
                return err;
        }

        err = pci_request_regions(pdev, KBUILD_MODNAME);
        if (err) {
                printk(KERN_ERR "%s (rtl8180): Cannot obtain PCI resources\n",
                       pci_name(pdev));
                return err;
        }

        io_addr = pci_resource_start(pdev, 0);
        io_len = pci_resource_len(pdev, 0);
        mem_addr = pci_resource_start(pdev, 1);
        mem_len = pci_resource_len(pdev, 1);

        if (mem_len < sizeof(struct rtl818x_csr) ||
            io_len < sizeof(struct rtl818x_csr)) {
                printk(KERN_ERR "%s (rtl8180): Too short PCI resources\n",
                       pci_name(pdev));
                err = -ENOMEM;
                goto err_free_reg;
        }

        if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) ||
            (err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))) {
                printk(KERN_ERR "%s (rtl8180): No suitable DMA available\n",
                       pci_name(pdev));
                goto err_free_reg;
        }

        pci_set_master(pdev);

        dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8180_ops);
        if (!dev) {
                printk(KERN_ERR "%s (rtl8180): ieee80211 alloc failed\n",
                       pci_name(pdev));
                err = -ENOMEM;
                goto err_free_reg;
        }

        priv = dev->priv;
        priv->pdev = pdev;

        dev->max_rates = 1;
        SET_IEEE80211_DEV(dev, &pdev->dev);
        pci_set_drvdata(pdev, dev);

        priv->map_pio = false;
        priv->map = pci_iomap(pdev, 1, mem_len);
        if (!priv->map) {
                priv->map = pci_iomap(pdev, 0, io_len);
                priv->map_pio = true;
        }

        if (!priv->map) {
                dev_err(&pdev->dev, "Cannot map device memory/PIO\n");
                err = -ENOMEM;
                goto err_free_dev;
        }

        BUILD_BUG_ON(sizeof(priv->channels) != sizeof(rtl818x_channels));
        BUILD_BUG_ON(sizeof(priv->rates) != sizeof(rtl818x_rates));

        memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
        memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));

        priv->band.band = IEEE80211_BAND_2GHZ;
        priv->band.channels = priv->channels;
        priv->band.n_channels = ARRAY_SIZE(rtl818x_channels);
        priv->band.bitrates = priv->rates;
        priv->band.n_bitrates = 4;
        dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;

        dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
                IEEE80211_HW_RX_INCLUDES_FCS;
        dev->vif_data_size = sizeof(struct rtl8180_vif);
        dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
                                        BIT(NL80211_IFTYPE_ADHOC);
        dev->max_signal = 65;

        reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
        reg &= RTL818X_TX_CONF_HWVER_MASK;
        switch (reg) {
        case RTL818X_TX_CONF_R8180_ABCD:
                chip_name = "RTL8180";
                priv->chip_family = RTL818X_CHIP_FAMILY_RTL8180;
                break;

        case RTL818X_TX_CONF_R8180_F:
                chip_name = "RTL8180vF";
                priv->chip_family = RTL818X_CHIP_FAMILY_RTL8180;
                break;

        case RTL818X_TX_CONF_R8185_ABC:
                chip_name = "RTL8185";
                priv->chip_family = RTL818X_CHIP_FAMILY_RTL8185;
                break;

        case RTL818X_TX_CONF_R8185_D:
                chip_name = "RTL8185vD";
                priv->chip_family = RTL818X_CHIP_FAMILY_RTL8185;
                break;

        case RTL818X_TX_CONF_RTL8187SE:
                chip_name = "RTL8187SE";
                if (priv->map_pio) {
                        dev_err(&pdev->dev,
                                "MMIO failed. PIO not supported on RTL8187SE\n");
                        err = -ENOMEM;
                        goto err_iounmap;
                }
                priv->chip_family = RTL818X_CHIP_FAMILY_RTL8187SE;
                break;

        default:
                printk(KERN_ERR "%s (rtl8180): Unknown chip! (0x%x)\n",
                       pci_name(pdev), reg >> 25);
                err = -ENODEV;
                goto err_iounmap;
        }

        /* we declare to MAC80211 all the queues except for beacon queue
         * that will be eventually handled by DRV.
         * TX rings are arranged in such a way that lower is the IDX,
         * higher is the priority, in order to achieve direct mapping
         * with mac80211, however the beacon queue is an exception and it
         * is mapped on the highst tx ring IDX.
         */
        if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                dev->queues = RTL8187SE_NR_TX_QUEUES - 1;
        else
                dev->queues = RTL8180_NR_TX_QUEUES - 1;

        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
                priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates);
                pci_try_set_mwi(pdev);
        }

        if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180)
                dev->flags |= IEEE80211_HW_SIGNAL_DBM;
        else
                dev->flags |= IEEE80211_HW_SIGNAL_UNSPEC;

        rtl8180_eeprom_read(priv);

        switch (priv->rf_type) {
        case 1: rf_name = "Intersil";
                break;
        case 2: rf_name = "RFMD";
                break;
        case 3: priv->rf = &sa2400_rf_ops;
                break;
        case 4: priv->rf = &max2820_rf_ops;
                break;
        case 5: priv->rf = &grf5101_rf_ops;
                break;
        case 9:
                if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
                        priv->rf = rtl8187se_detect_rf(dev);
                else
                        priv->rf = rtl8180_detect_rf(dev);
                break;
        case 10:
                rf_name = "RTL8255";
                break;
        default:
                printk(KERN_ERR "%s (rtl8180): Unknown RF! (0x%x)\n",
                       pci_name(pdev), priv->rf_type);
                err = -ENODEV;
                goto err_iounmap;
        }

        if (!priv->rf) {
                printk(KERN_ERR "%s (rtl8180): %s RF frontend not supported!\n",
                       pci_name(pdev), rf_name);
                err = -ENODEV;
                goto err_iounmap;
        }

        if (!is_valid_ether_addr(priv->mac_addr)) {
                printk(KERN_WARNING "%s (rtl8180): Invalid hwaddr! Using"
                       " randomly generated MAC addr\n", pci_name(pdev));
                eth_random_addr(priv->mac_addr);
        }
        SET_IEEE80211_PERM_ADDR(dev, priv->mac_addr);

        spin_lock_init(&priv->lock);

        err = ieee80211_register_hw(dev);
        if (err) {
                printk(KERN_ERR "%s (rtl8180): Cannot register device\n",
                       pci_name(pdev));
                goto err_iounmap;
        }

        wiphy_info(dev->wiphy, "hwaddr %pm, %s + %s\n",
                   priv->mac_addr, chip_name, priv->rf->name);

        return 0;

 err_iounmap:
        pci_iounmap(pdev, priv->map);

 err_free_dev:
        ieee80211_free_hw(dev);

 err_free_reg:
        pci_release_regions(pdev);
        pci_disable_device(pdev);
        return err;
}

static void rtl8180_remove(struct pci_dev *pdev)
{
        struct ieee80211_hw *dev = pci_get_drvdata(pdev);
        struct rtl8180_priv *priv;

        if (!dev)
                return;

        ieee80211_unregister_hw(dev);

        priv = dev->priv;

        pci_iounmap(pdev, priv->map);
        pci_release_regions(pdev);
        pci_disable_device(pdev);
        ieee80211_free_hw(dev);
}

#ifdef CONFIG_PM
static int rtl8180_suspend(struct pci_dev *pdev, pm_message_t state)
{
        pci_save_state(pdev);
        pci_set_power_state(pdev, pci_choose_state(pdev, state));
        return 0;
}

static int rtl8180_resume(struct pci_dev *pdev)
{
        pci_set_power_state(pdev, PCI_D0);
        pci_restore_state(pdev);
        return 0;
}

#endif /* CONFIG_PM */

static struct pci_driver rtl8180_driver = {
        .name           = KBUILD_MODNAME,
        .id_table       = rtl8180_table,
        .probe          = rtl8180_probe,
        .remove         = rtl8180_remove,
#ifdef CONFIG_PM
        .suspend        = rtl8180_suspend,
        .resume         = rtl8180_resume,
#endif /* CONFIG_PM */
};

module_pci_driver(rtl8180_driver);