[P54]: add mac80211-based driver for prism54 softmac hardware

Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 983 insertions, 0 deletions

diff --git a/drivers/net/wireless/p54common.c b/drivers/net/wireless/p54common.c
new file mode 100644
index 000000000000..b05b5c5b4c04
--- /dev/null
+++ b/drivers/net/wireless/p54common.c
@@ -0,0 +1,983 @@
+
+/*
+ * Common code for mac80211 Prism54 drivers
+ *
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
+ *
+ * Based on the islsm (softmac prism54) driver, which is:
+ * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
+ *
+ * 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/init.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+
+#include <net/mac80211.h>
+
+#include "p54.h"
+#include "p54common.h"
+
+MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
+MODULE_DESCRIPTION("Softmac Prism54 common code");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("prism54common");
+
+void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
+{
+        struct p54_common *priv = dev->priv;
+        struct bootrec_exp_if *exp_if;
+        struct bootrec *bootrec;
+        u32 *data = (u32 *)fw->data;
+        u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
+        u8 *fw_version = NULL;
+        size_t len;
+        int i;
+
+        if (priv->rx_start)
+                return;
+
+        while (data < end_data && *data)
+                data++;
+
+        while (data < end_data && !*data)
+                data++;
+
+        bootrec = (struct bootrec *) data;
+
+        while (bootrec->data <= end_data &&
+               (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
+                u32 code = le32_to_cpu(bootrec->code);
+                switch (code) {
+                case BR_CODE_COMPONENT_ID:
+                        switch (be32_to_cpu(*bootrec->data)) {
+                        case FW_FMAC:
+                                printk(KERN_INFO "p54: FreeMAC firmware\n");
+                                break;
+                        case FW_LM20:
+                                printk(KERN_INFO "p54: LM20 firmware\n");
+                                break;
+                        case FW_LM86:
+                                printk(KERN_INFO "p54: LM86 firmware\n");
+                                break;
+                        case FW_LM87:
+                                printk(KERN_INFO "p54: LM87 firmware - not supported yet!\n");
+                                break;
+                        default:
+                                printk(KERN_INFO "p54: unknown firmware\n");
+                                break;
+                        }
+                        break;
+                case BR_CODE_COMPONENT_VERSION:
+                        /* 24 bytes should be enough for all firmwares */
+                        if (strnlen((unsigned char*)bootrec->data, 24) < 24)
+                                fw_version = (unsigned char*)bootrec->data;
+                        break;
+                case BR_CODE_DESCR:
+                        priv->rx_start = le32_to_cpu(bootrec->data[1]);
+                        /* FIXME add sanity checking */
+                        priv->rx_end = le32_to_cpu(bootrec->data[2]) - 0x3500;
+                        break;
+                case BR_CODE_EXPOSED_IF:
+                        exp_if = (struct bootrec_exp_if *) bootrec->data;
+                        for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
+                                if (exp_if[i].if_id == 0x1a)
+                                        priv->fw_var = le16_to_cpu(exp_if[i].variant);
+                        break;
+                case BR_CODE_DEPENDENT_IF:
+                        break;
+                case BR_CODE_END_OF_BRA:
+                case LEGACY_BR_CODE_END_OF_BRA:
+                        end_data = NULL;
+                        break;
+                default:
+                        break;
+                }
+                bootrec = (struct bootrec *)&bootrec->data[len];
+        }
+
+        if (fw_version)
+                printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
+                        fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
+
+        if (priv->fw_var >= 0x300) {
+                /* Firmware supports QoS, use it! */
+                priv->tx_stats.data[0].limit = 3;
+                priv->tx_stats.data[1].limit = 4;
+                priv->tx_stats.data[2].limit = 3;
+                priv->tx_stats.data[3].limit = 1;
+                dev->queues = 4;
+        }
+}
+EXPORT_SYMBOL_GPL(p54_parse_firmware);
+
+static int p54_convert_rev0_to_rev1(struct ieee80211_hw *dev,
+                                    struct pda_pa_curve_data *curve_data)
+{
+        struct p54_common *priv = dev->priv;
+        struct pda_pa_curve_data_sample_rev1 *rev1;
+        struct pda_pa_curve_data_sample_rev0 *rev0;
+        size_t cd_len = sizeof(*curve_data) +
+                (curve_data->points_per_channel*sizeof(*rev1) + 2) *
+                 curve_data->channels;
+        unsigned int i, j;
+        void *source, *target;
+
+        priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
+        if (!priv->curve_data)
+                return -ENOMEM;
+
+        memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
+        source = curve_data->data;
+        target = priv->curve_data->data;
+        for (i = 0; i < curve_data->channels; i++) {
+                __le16 *freq = source;
+                source += sizeof(__le16);
+                *((__le16 *)target) = *freq;
+                target += sizeof(__le16);
+                for (j = 0; j < curve_data->points_per_channel; j++) {
+                        rev1 = target;
+                        rev0 = source;
+
+                        rev1->rf_power = rev0->rf_power;
+                        rev1->pa_detector = rev0->pa_detector;
+                        rev1->data_64qam = rev0->pcv;
+                        /* "invent" the points for the other modulations */
+#define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
+                        rev1->data_16qam = SUB(rev0->pcv, 12);
+                        rev1->data_qpsk  = SUB(rev1->data_16qam, 12);
+                        rev1->data_bpsk  = SUB(rev1->data_qpsk, 12);
+                        rev1->data_barker= SUB(rev1->data_bpsk, 14);
+#undef SUB
+                        target += sizeof(*rev1);
+                        source += sizeof(*rev0);
+                }
+        }
+
+        return 0;
+}
+
+int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
+{
+        struct p54_common *priv = dev->priv;
+        struct eeprom_pda_wrap *wrap = NULL;
+        struct pda_entry *entry;
+        int i = 0;
+        unsigned int data_len, entry_len;
+        void *tmp;
+        int err;
+
+        wrap = (struct eeprom_pda_wrap *) eeprom;
+        entry = (void *)wrap->data + wrap->len;
+        i += 2;
+        i += le16_to_cpu(entry->len)*2;
+        while (i < len) {
+                entry_len = le16_to_cpu(entry->len);
+                data_len = ((entry_len - 1) << 1);
+                switch (le16_to_cpu(entry->code)) {
+                case PDR_MAC_ADDRESS:
+                        SET_IEEE80211_PERM_ADDR(dev, entry->data);
+                        break;
+                case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
+                        if (data_len < 2) {
+                                err = -EINVAL;
+                                goto err;
+                        }
+
+                        if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
+                                err = -EINVAL;
+                                goto err;
+                        }
+
+                        priv->output_limit = kmalloc(entry->data[1] *
+                                sizeof(*priv->output_limit), GFP_KERNEL);
+
+                        if (!priv->output_limit) {
+                                err = -ENOMEM;
+                                goto err;
+                        }
+
+                        memcpy(priv->output_limit, &entry->data[2],
+                               entry->data[1]*sizeof(*priv->output_limit));
+                        priv->output_limit_len = entry->data[1];
+                        break;
+                case PDR_PRISM_PA_CAL_CURVE_DATA:
+                        if (data_len < sizeof(struct pda_pa_curve_data)) {
+                                err = -EINVAL;
+                                goto err;
+                        }
+
+                        if (((struct pda_pa_curve_data *)entry->data)->cal_method_rev) {
+                                priv->curve_data = kmalloc(data_len, GFP_KERNEL);
+                                if (!priv->curve_data) {
+                                        err = -ENOMEM;
+                                        goto err;
+                                }
+
+                                memcpy(priv->curve_data, entry->data, data_len);
+                        } else {
+                                err = p54_convert_rev0_to_rev1(dev, (struct pda_pa_curve_data *)entry->data);
+                                if (err)
+                                        goto err;
+                        }
+
+                        break;
+                case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
+                        priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
+                        if (!priv->iq_autocal) {
+                                err = -ENOMEM;
+                                goto err;
+                        }
+
+                        memcpy(priv->iq_autocal, entry->data, data_len);
+                        priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
+                        break;
+                case PDR_INTERFACE_LIST:
+                        tmp = entry->data;
+                        while ((u8 *)tmp < entry->data + data_len) {
+                                struct bootrec_exp_if *exp_if = tmp;
+                                if (le16_to_cpu(exp_if->if_id) == 0xF)
+                                        priv->rxhw = exp_if->variant & cpu_to_le16(0x07);
+                                tmp += sizeof(struct bootrec_exp_if);
+                        }
+                        break;
+                case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
+                        priv->version = *(u8 *)(entry->data + 1);
+                        break;
+                case PDR_END:
+                        i = len;
+                        break;
+                }
+
+                entry = (void *)entry + (entry_len + 1)*2;
+                i += 2;
+                i += entry_len*2;
+        }
+
+        if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
+                printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
+                err = -EINVAL;
+                goto err;
+        }
+
+        return 0;
+
+  err:
+        if (priv->iq_autocal) {
+                kfree(priv->iq_autocal);
+                priv->iq_autocal = NULL;
+        }
+
+        if (priv->output_limit) {
+                kfree(priv->output_limit);
+                priv->output_limit = NULL;
+        }
+
+        if (priv->curve_data) {
+                kfree(priv->curve_data);
+                priv->curve_data = NULL;
+        }
+
+        printk(KERN_ERR "p54: eeprom parse failed!\n");
+        return err;
+}
+EXPORT_SYMBOL_GPL(p54_parse_eeprom);
+
+void p54_fill_eeprom_readback(struct p54_control_hdr *hdr)
+{
+        struct p54_eeprom_lm86 *eeprom_hdr;
+
+        hdr->magic1 = cpu_to_le16(0x8000);
+        hdr->len = cpu_to_le16(sizeof(*eeprom_hdr) + 0x2000);
+        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
+        hdr->retry1 = hdr->retry2 = 0;
+        eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
+        eeprom_hdr->offset = 0x0;
+        eeprom_hdr->len = cpu_to_le16(0x2000);
+}
+EXPORT_SYMBOL_GPL(p54_fill_eeprom_readback);
+
+static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
+{
+        struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
+        struct ieee80211_rx_status rx_status = {0};
+        u16 freq = le16_to_cpu(hdr->freq);
+
+        rx_status.ssi = hdr->rssi;
+        rx_status.rate = hdr->rate & 0x1f; /* report short preambles & CCK too */
+        rx_status.channel = freq == 2484 ? 14 : (freq - 2407)/5;
+        rx_status.freq = freq;
+        rx_status.phymode = MODE_IEEE80211G;
+        rx_status.antenna = hdr->antenna;
+        rx_status.mactime = le64_to_cpu(hdr->timestamp);
+
+        skb_pull(skb, sizeof(*hdr));
+        skb_trim(skb, le16_to_cpu(hdr->len));
+
+        ieee80211_rx_irqsafe(dev, skb, &rx_status);
+}
+
+static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
+{
+        struct p54_common *priv = dev->priv;
+        int i;
+
+        /* ieee80211_start_queues is great if all queues are really empty.
+         * But, what if some are full? */
+
+        for (i = 0; i < dev->queues; i++)
+                if (priv->tx_stats.data[i].len < priv->tx_stats.data[i].limit)
+                        ieee80211_wake_queue(dev, i);
+}
+
+static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
+{
+        struct p54_common *priv = dev->priv;
+        struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
+        struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
+        struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
+        u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
+        struct memrecord *range = NULL;
+        u32 freed = 0;
+        u32 last_addr = priv->rx_start;
+
+        while (entry != (struct sk_buff *)&priv->tx_queue) {
+                range = (struct memrecord *)&entry->cb;
+                if (range->start_addr == addr) {
+                        struct ieee80211_tx_status status = {{0}};
+                        struct p54_control_hdr *entry_hdr;
+                        struct p54_tx_control_allocdata *entry_data;
+                        int pad = 0;
+
+                        if (entry->next != (struct sk_buff *)&priv->tx_queue)
+                                freed = ((struct memrecord *)&entry->next->cb)->start_addr - last_addr;
+                        else
+                                freed = priv->rx_end - last_addr;
+
+                        last_addr = range->end_addr;
+                        __skb_unlink(entry, &priv->tx_queue);
+                        if (!range->control) {
+                                kfree_skb(entry);
+                                break;
+                        }
+                        memcpy(&status.control, range->control,
+                               sizeof(status.control));
+                        kfree(range->control);
+                        priv->tx_stats.data[status.control.queue].len--;
+
+                        entry_hdr = (struct p54_control_hdr *) entry->data;
+                        entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
+                        if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
+                                pad = entry_data->align[0];
+
+                        if (!status.control.flags & IEEE80211_TXCTL_NO_ACK) {
+                                if (!(payload->status & 0x01))
+                                        status.flags |= IEEE80211_TX_STATUS_ACK;
+                                else
+                                        status.excessive_retries = 1;
+                        }
+                        status.retry_count = payload->retries - 1;
+                        status.ack_signal = le16_to_cpu(payload->ack_rssi);
+                        skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
+                        ieee80211_tx_status_irqsafe(dev, entry, &status);
+                        break;
+                } else
+                        last_addr = range->end_addr;
+                entry = entry->next;
+        }
+
+        if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
+            sizeof(struct p54_control_hdr))
+                p54_wake_free_queues(dev);
+}
+
+static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
+{
+        struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
+
+        switch (le16_to_cpu(hdr->type)) {
+        case P54_CONTROL_TYPE_TXDONE:
+                p54_rx_frame_sent(dev, skb);
+                break;
+        case P54_CONTROL_TYPE_BBP:
+                break;
+        default:
+                printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
+                       wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
+                break;
+        }
+}
+
+/* returns zero if skb can be reused */
+int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
+{
+        u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
+        switch (type) {
+        case 0x00:
+        case 0x01:
+                p54_rx_data(dev, skb);
+                return -1;
+        case 0x4d:
+                /* TODO: do something better... but then again, I've never seen this happen */
+                printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
+                       wiphy_name(dev->wiphy));
+                break;
+        case 0x80:
+                p54_rx_control(dev, skb);
+                break;
+        default:
+                printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
+                       wiphy_name(dev->wiphy), type);
+                break;
+        }
+        return 0;
+}
+EXPORT_SYMBOL_GPL(p54_rx);
+
+/*
+ * So, the firmware is somewhat stupid and doesn't know what places in its
+ * memory incoming data should go to. By poking around in the firmware, we
+ * can find some unused memory to upload our packets to. However, data that we
+ * want the card to TX needs to stay intact until the card has told us that
+ * it is done with it. This function finds empty places we can upload to and
+ * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
+ * allocated areas.
+ */
+static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
+                               struct p54_control_hdr *data, u32 len,
+                               struct ieee80211_tx_control *control)
+{
+        struct p54_common *priv = dev->priv;
+        struct sk_buff *entry = priv->tx_queue.next;
+        struct sk_buff *target_skb = NULL;
+        struct memrecord *range;
+        u32 last_addr = priv->rx_start;
+        u32 largest_hole = 0;
+        u32 target_addr = priv->rx_start;
+        unsigned long flags;
+        unsigned int left;
+        len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
+
+        spin_lock_irqsave(&priv->tx_queue.lock, flags);
+        left = skb_queue_len(&priv->tx_queue);
+        while (left--) {
+                u32 hole_size;
+                range = (struct memrecord *)&entry->cb;
+                hole_size = range->start_addr - last_addr;
+                if (!target_skb && hole_size >= len) {
+                        target_skb = entry->prev;
+                        hole_size -= len;
+                        target_addr = last_addr;
+                }
+                largest_hole = max(largest_hole, hole_size);
+                last_addr = range->end_addr;
+                entry = entry->next;
+        }
+        if (!target_skb && priv->rx_end - last_addr >= len) {
+                target_skb = priv->tx_queue.prev;
+                largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
+                if (!skb_queue_empty(&priv->tx_queue)) {
+                        range = (struct memrecord *)&target_skb->cb;
+                        target_addr = range->end_addr;
+                }
+        } else
+                largest_hole = max(largest_hole, priv->rx_end - last_addr);
+
+        if (skb) {
+                range = (struct memrecord *)&skb->cb;
+                range->start_addr = target_addr;
+                range->end_addr = target_addr + len;
+                range->control = control;
+                __skb_queue_after(&priv->tx_queue, target_skb, skb);
+                if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
+                                   sizeof(struct p54_control_hdr))
+                        ieee80211_stop_queues(dev);
+        }
+        spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
+
+        data->req_id = cpu_to_le32(target_addr + 0x70);
+}
+
+static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
+                  struct ieee80211_tx_control *control)
+{
+        struct ieee80211_tx_queue_stats_data *current_queue;
+        struct p54_common *priv = dev->priv;
+        struct p54_control_hdr *hdr;
+        struct p54_tx_control_allocdata *txhdr;
+        struct ieee80211_tx_control *control_copy;
+        size_t padding, len;
+        u8 rate;
+
+        current_queue = &priv->tx_stats.data[control->queue];
+        if (unlikely(current_queue->len > current_queue->limit))
+                return NETDEV_TX_BUSY;
+        current_queue->len++;
+        current_queue->count++;
+        if (current_queue->len == current_queue->limit)
+                ieee80211_stop_queue(dev, control->queue);
+
+        padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
+        len = skb->len;
+
+        control_copy = kmalloc(sizeof(*control), GFP_ATOMIC);
+        if (control_copy)
+                memcpy(control_copy, control, sizeof(*control));
+
+        txhdr = (struct p54_tx_control_allocdata *)
+                        skb_push(skb, sizeof(*txhdr) + padding);
+        hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
+
+        if (padding)
+                hdr->magic1 = cpu_to_le16(0x4010);
+        else
+                hdr->magic1 = cpu_to_le16(0x0010);
+        hdr->len = cpu_to_le16(len);
+        hdr->type = (control->flags & IEEE80211_TXCTL_NO_ACK) ? 0 : cpu_to_le16(1);
+        hdr->retry1 = hdr->retry2 = control->retry_limit;
+        p54_assign_address(dev, skb, hdr, skb->len, control_copy);
+
+        memset(txhdr->wep_key, 0x0, 16);
+        txhdr->padding = 0;
+        txhdr->padding2 = 0;
+
+        /* TODO: add support for alternate retry TX rates */
+        rate = control->tx_rate;
+        if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
+                rate |= 0x40;
+        else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
+                rate |= 0x20;
+        memset(txhdr->rateset, rate, 8);
+        txhdr->wep_key_present = 0;
+        txhdr->wep_key_len = 0;
+        txhdr->frame_type = cpu_to_le32(control->queue + 4);
+        txhdr->magic4 = 0;
+        txhdr->antenna = (control->antenna_sel_tx == 0) ?
+                2 : control->antenna_sel_tx - 1;
+        txhdr->output_power = 0x7f; // HW Maximum
+        txhdr->magic5 = (control->flags & IEEE80211_TXCTL_NO_ACK) ?
+                0 : ((rate > 0x3) ? cpu_to_le32(0x33) : cpu_to_le32(0x23));
+        if (padding)
+                txhdr->align[0] = padding;
+
+        priv->tx(dev, hdr, skb->len, 0);
+        return 0;
+}
+
+static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
+                          const u8 *dst, const u8 *src, u8 antenna,
+                          u32 magic3, u32 magic8, u32 magic9)
+{
+        struct p54_common *priv = dev->priv;
+        struct p54_control_hdr *hdr;
+        struct p54_tx_control_filter *filter;
+
+        hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
+                      priv->tx_hdr_len, GFP_KERNEL);
+        if (!hdr)
+                return -ENOMEM;
+
+        hdr = (void *)hdr + priv->tx_hdr_len;
+
+        filter = (struct p54_tx_control_filter *) hdr->data;
+        hdr->magic1 = cpu_to_le16(0x8001);
+        hdr->len = cpu_to_le16(sizeof(*filter));
+        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter), NULL);
+        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
+
+        filter->filter_type = cpu_to_le16(filter_type);
+        memcpy(filter->dst, dst, ETH_ALEN);
+        if (!src)
+                memset(filter->src, ~0, ETH_ALEN);
+        else
+                memcpy(filter->src, src, ETH_ALEN);
+        filter->antenna = antenna;
+        filter->magic3 = cpu_to_le32(magic3);
+        filter->rx_addr = cpu_to_le32(priv->rx_end);
+        filter->max_rx = cpu_to_le16(0x0620);   /* FIXME: for usb ver 1.. maybe */
+        filter->rxhw = priv->rxhw;
+        filter->magic8 = cpu_to_le16(magic8);
+        filter->magic9 = cpu_to_le16(magic9);
+
+        priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
+        return 0;
+}
+
+static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
+{
+        struct p54_common *priv = dev->priv;
+        struct p54_control_hdr *hdr;
+        struct p54_tx_control_channel *chan;
+        unsigned int i;
+        size_t payload_len = sizeof(*chan) + sizeof(u32)*2 +
+                             sizeof(*chan->curve_data) *
+                             priv->curve_data->points_per_channel;
+        void *entry;
+
+        hdr = kzalloc(sizeof(*hdr) + payload_len +
+                      priv->tx_hdr_len, GFP_KERNEL);
+        if (!hdr)
+                return -ENOMEM;
+
+        hdr = (void *)hdr + priv->tx_hdr_len;
+
+        chan = (struct p54_tx_control_channel *) hdr->data;
+
+        hdr->magic1 = cpu_to_le16(0x8001);
+        hdr->len = cpu_to_le16(sizeof(*chan));
+        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
+        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + payload_len, NULL);
+
+        chan->magic1 = cpu_to_le16(0x1);
+        chan->magic2 = cpu_to_le16(0x0);
+
+        for (i = 0; i < priv->iq_autocal_len; i++) {
+                if (priv->iq_autocal[i].freq != freq)
+                        continue;
+
+                memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
+                       sizeof(*priv->iq_autocal));
+                break;
+        }
+        if (i == priv->iq_autocal_len)
+                goto err;
+
+        for (i = 0; i < priv->output_limit_len; i++) {
+                if (priv->output_limit[i].freq != freq)
+                        continue;
+
+                chan->val_barker = 0x38;
+                chan->val_bpsk = priv->output_limit[i].val_bpsk;
+                chan->val_qpsk = priv->output_limit[i].val_qpsk;
+                chan->val_16qam = priv->output_limit[i].val_16qam;
+                chan->val_64qam = priv->output_limit[i].val_64qam;
+                break;
+        }
+        if (i == priv->output_limit_len)
+                goto err;
+
+        chan->pa_points_per_curve = priv->curve_data->points_per_channel;
+
+        entry = priv->curve_data->data;
+        for (i = 0; i < priv->curve_data->channels; i++) {
+                if (*((__le16 *)entry) != freq) {
+                        entry += sizeof(__le16);
+                        entry += sizeof(struct pda_pa_curve_data_sample_rev1) *
+                                 chan->pa_points_per_curve;
+                        continue;
+                }
+
+                entry += sizeof(__le16);
+                memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
+                       chan->pa_points_per_curve);
+                break;
+        }
+
+        memcpy(hdr->data + payload_len - 4, &chan->val_bpsk, 4);
+
+        priv->tx(dev, hdr, sizeof(*hdr) + payload_len, 1);
+        return 0;
+
+ err:
+        printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
+        kfree(hdr);
+        return -EINVAL;
+}
+
+static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
+{
+        struct p54_common *priv = dev->priv;
+        struct p54_control_hdr *hdr;
+        struct p54_tx_control_led *led;
+
+        hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
+                      priv->tx_hdr_len, GFP_KERNEL);
+        if (!hdr)
+                return -ENOMEM;
+
+        hdr = (void *)hdr + priv->tx_hdr_len;
+        hdr->magic1 = cpu_to_le16(0x8001);
+        hdr->len = cpu_to_le16(sizeof(*led));
+        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
+        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led), NULL);
+
+        led = (struct p54_tx_control_led *) hdr->data;
+        led->mode = cpu_to_le16(mode);
+        led->led_permanent = cpu_to_le16(link);
+        led->led_temporary = cpu_to_le16(act);
+        led->duration = cpu_to_le16(1000);
+
+        priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
+
+        return 0;
+}
+
+#define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, burst)      \
+do {                                                            \
+        queue.aifs = cpu_to_le16(ai_fs);                        \
+        queue.cwmin = cpu_to_le16(cw_min);                      \
+        queue.cwmax = cpu_to_le16(cw_max);                      \
+        queue.txop = (burst == 0) ?                             \
+                0 : cpu_to_le16((burst * 100) / 32 + 1);        \
+} while(0)
+
+static void p54_init_vdcf(struct ieee80211_hw *dev)
+{
+        struct p54_common *priv = dev->priv;
+        struct p54_control_hdr *hdr;
+        struct p54_tx_control_vdcf *vdcf;
+
+        /* all USB V1 adapters need a extra headroom */
+        hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
+        hdr->magic1 = cpu_to_le16(0x8001);
+        hdr->len = cpu_to_le16(sizeof(*vdcf));
+        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
+        hdr->req_id = cpu_to_le32(priv->rx_start);
+
+        vdcf = (struct p54_tx_control_vdcf *) hdr->data;
+
+        P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 0x000f);
+        P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 0x001e);
+        P54_SET_QUEUE(vdcf->queue[2], 0x0002, 0x000f, 0x03ff, 0x0014);
+        P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0x0000);
+}
+
+static void p54_set_vdcf(struct ieee80211_hw *dev)
+{
+        struct p54_common *priv = dev->priv;
+        struct p54_control_hdr *hdr;
+        struct p54_tx_control_vdcf *vdcf;
+
+        hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
+
+        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf), NULL);
+
+        vdcf = (struct p54_tx_control_vdcf *) hdr->data;
+
+        if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
+                vdcf->slottime = 9;
+                vdcf->magic1 = 0x00;
+                vdcf->magic2 = 0x10;
+        } else {
+                vdcf->slottime = 20;
+                vdcf->magic1 = 0x0a;
+                vdcf->magic2 = 0x06;
+        }
+
+        /* (see prism54/isl_oid.h for further details) */
+        vdcf->frameburst = cpu_to_le16(0);
+
+        priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
+}
+
+static int p54_add_interface(struct ieee80211_hw *dev,
+                             struct ieee80211_if_init_conf *conf)
+{
+        struct p54_common *priv = dev->priv;
+        int err;
+
+        /* NOTE: using IEEE80211_IF_TYPE_MGMT to indicate no mode selected */
+        if (priv->mode != IEEE80211_IF_TYPE_MGMT)
+                return -1;
+
+        switch (conf->type) {
+        case IEEE80211_IF_TYPE_STA:
+                priv->mode = conf->type;
+                break;
+        default:
+                return -EOPNOTSUPP;
+        }
+
+        priv->mac_addr = conf->mac_addr;
+
+        err = priv->open(dev);
+        if (err) {
+                priv->mode = IEEE80211_IF_TYPE_MGMT;
+                skb_queue_purge(&priv->tx_queue);
+                return err;
+        }
+
+        p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
+        p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
+        p54_set_vdcf(dev);
+
+        switch (conf->type) {
+        case IEEE80211_IF_TYPE_STA:
+                p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
+                break;
+        }
+
+        p54_set_leds(dev, 1, 0, 0);
+
+        return 0;
+}
+
+static void p54_remove_interface(struct ieee80211_hw *dev,
+                                 struct ieee80211_if_init_conf *conf)
+{
+        struct p54_common *priv = dev->priv;
+        struct sk_buff *skb;
+        while ((skb = skb_dequeue(&priv->tx_queue))) {
+                struct memrecord *range = (struct memrecord *)&skb->cb;
+                if (range->control)
+                        kfree(range->control);
+                kfree_skb(skb);
+        }
+        priv->mode = IEEE80211_IF_TYPE_MGMT;
+        priv->stop(dev);
+}
+
+static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
+{
+        int ret;
+
+        ret = p54_set_freq(dev, cpu_to_le16(conf->freq));
+        p54_set_vdcf(dev);
+        return ret;
+}
+
+static int p54_config_interface(struct ieee80211_hw *dev, int if_id,
+                                struct ieee80211_if_conf *conf)
+{
+        struct p54_common *priv = dev->priv;
+
+        p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
+        p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
+        p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
+        return 0;
+}
+
+static int p54_conf_tx(struct ieee80211_hw *dev, int queue,
+                       const struct ieee80211_tx_queue_params *params)
+{
+        struct p54_common *priv = dev->priv;
+        struct p54_tx_control_vdcf *vdcf;
+
+        vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
+                ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
+
+        if ((params) && !((queue < 0) || (queue > 4))) {
+                P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
+                        params->cw_min, params->cw_max, params->burst_time);
+        } else
+                return -EINVAL;
+
+        p54_set_vdcf(dev);
+
+        return 0;
+}
+
+static int p54_get_stats(struct ieee80211_hw *dev,
+                         struct ieee80211_low_level_stats *stats)
+{
+        /* TODO */
+        return 0;
+}
+
+static int p54_get_tx_stats(struct ieee80211_hw *dev,
+                            struct ieee80211_tx_queue_stats *stats)
+{
+        struct p54_common *priv = dev->priv;
+        unsigned int i;
+
+        for (i = 0; i < dev->queues; i++)
+                memcpy(&stats->data[i], &priv->tx_stats.data[i],
+                        sizeof(stats->data[i]));
+
+        return 0;
+}
+
+static const struct ieee80211_ops p54_ops = {
+        .tx                     = p54_tx,
+        .add_interface          = p54_add_interface,
+        .remove_interface       = p54_remove_interface,
+        .config                 = p54_config,
+        .config_interface       = p54_config_interface,
+        .conf_tx                = p54_conf_tx,
+        .get_stats              = p54_get_stats,
+        .get_tx_stats           = p54_get_tx_stats
+};
+
+struct ieee80211_hw *p54_init_common(size_t priv_data_len)
+{
+        struct ieee80211_hw *dev;
+        struct p54_common *priv;
+        int i;
+
+        dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
+        if (!dev)
+                return NULL;
+
+        priv = dev->priv;
+        priv->mode = IEEE80211_IF_TYPE_MGMT;
+        skb_queue_head_init(&priv->tx_queue);
+        memcpy(priv->channels, p54_channels, sizeof(p54_channels));
+        memcpy(priv->rates, p54_rates, sizeof(p54_rates));
+        priv->modes[1].mode = MODE_IEEE80211B;
+        priv->modes[1].num_rates = 4;
+        priv->modes[1].rates = priv->rates;
+        priv->modes[1].num_channels = ARRAY_SIZE(p54_channels);
+        priv->modes[1].channels = priv->channels;
+        priv->modes[0].mode = MODE_IEEE80211G;
+        priv->modes[0].num_rates = ARRAY_SIZE(p54_rates);
+        priv->modes[0].rates = priv->rates;
+        priv->modes[0].num_channels = ARRAY_SIZE(p54_channels);
+        priv->modes[0].channels = priv->channels;
+        dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
+                    IEEE80211_HW_RX_INCLUDES_FCS;
+        dev->channel_change_time = 1000;        /* TODO: find actual value */
+        dev->max_rssi = 127;
+
+        priv->tx_stats.data[0].limit = 5;
+        dev->queues = 1;
+
+        dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
+                                 sizeof(struct p54_tx_control_allocdata);
+
+        priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf) +
+              priv->tx_hdr_len + sizeof(struct p54_control_hdr), GFP_KERNEL);
+
+        if (!priv->cached_vdcf) {
+                ieee80211_free_hw(dev);
+                return NULL;
+        }
+
+        p54_init_vdcf(dev);
+
+        for (i = 0; i < 2; i++) {
+                if (ieee80211_register_hwmode(dev, &priv->modes[i])) {
+                        kfree(priv->cached_vdcf);
+                        ieee80211_free_hw(dev);
+                        return NULL;
+                }
+        }
+
+        return dev;
+}
+EXPORT_SYMBOL_GPL(p54_init_common);
+
+void p54_free_common(struct ieee80211_hw *dev)
+{
+        struct p54_common *priv = dev->priv;
+        kfree(priv->iq_autocal);
+        kfree(priv->output_limit);
+        kfree(priv->curve_data);
+        kfree(priv->cached_vdcf);
+}
+EXPORT_SYMBOL_GPL(p54_free_common);
+
+static int __init p54_init(void)
+{
+        return 0;
+}
+
+static void __exit p54_exit(void)
+{
+}
+
+module_init(p54_init);
+module_exit(p54_exit);