[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, 906 insertions, 0 deletions

diff --git a/drivers/net/wireless/p54usb.c b/drivers/net/wireless/p54usb.c
new file mode 100644
index 000000000000..7446c39ce5d0
--- /dev/null
+++ b/drivers/net/wireless/p54usb.c
@@ -0,0 +1,906 @@
+
+/*
+ * Linux device driver for USB based Prism54
+ *
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ *
+ * 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/usb.h>
+#include <linux/pci.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+#include <linux/crc32.h>
+#include <net/mac80211.h>
+
+#include "p54.h"
+#include "p54usb.h"
+
+MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
+MODULE_DESCRIPTION("Prism54 USB wireless driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("prism54usb");
+
+static struct usb_device_id p54u_table[] __devinitdata = {
+	/* Version 1 devices (pci chip + net2280) */
+	{USB_DEVICE(0x0506, 0x0a11)},	/* 3COM 3CRWE254G72 */
+	{USB_DEVICE(0x0707, 0xee06)},	/* SMC 2862W-G */
+	{USB_DEVICE(0x083a, 0x4501)},	/* Accton 802.11g WN4501 USB */
+	{USB_DEVICE(0x083a, 0x4502)},	/* Siemens Gigaset USB Adapter */
+	{USB_DEVICE(0x0846, 0x4200)},	/* Netgear WG121 */
+	{USB_DEVICE(0x0846, 0x4210)},	/* Netgear WG121 the second ? */
+	{USB_DEVICE(0x0846, 0x4220)},	/* Netgear WG111 */
+	{USB_DEVICE(0x0cde, 0x0006)},	/* Medion 40900, Roper Europe */
+	{USB_DEVICE(0x124a, 0x4023)},	/* Shuttle PN15, Airvast WM168g, IOGear GWU513 */
+	{USB_DEVICE(0x1915, 0x2234)},	/* Linksys WUSB54G OEM */
+	{USB_DEVICE(0x1915, 0x2235)},	/* Linksys WUSB54G Portable OEM */
+	{USB_DEVICE(0x2001, 0x3701)},	/* DLink DWL-G120 Spinnaker */
+	{USB_DEVICE(0x2001, 0x3703)},	/* DLink DWL-G122 */
+	{USB_DEVICE(0x5041, 0x2234)},	/* Linksys WUSB54G */
+	{USB_DEVICE(0x5041, 0x2235)},	/* Linksys WUSB54G Portable */
+
+	/* Version 2 devices (3887) */
+	{USB_DEVICE(0x050d, 0x7050)},	/* Belkin F5D7050 ver 1000 */
+	{USB_DEVICE(0x0572, 0x2000)},	/* Cohiba Proto board */
+	{USB_DEVICE(0x0572, 0x2002)},	/* Cohiba Proto board */
+	{USB_DEVICE(0x0707, 0xee13)},   /* SMC 2862W-G version 2 */
+	{USB_DEVICE(0x083a, 0x4521)},   /* Siemens Gigaset USB Adapter 54 version 2 */
+	{USB_DEVICE(0x0846, 0x4240)},	/* Netgear WG111 (v2) */
+	{USB_DEVICE(0x0915, 0x2000)},	/* Cohiba Proto board */
+	{USB_DEVICE(0x0915, 0x2002)},	/* Cohiba Proto board */
+	{USB_DEVICE(0x0baf, 0x0118)},   /* U.S. Robotics U5 802.11g Adapter*/
+	{USB_DEVICE(0x0bf8, 0x1009)},   /* FUJITSU E-5400 USB D1700*/
+	{USB_DEVICE(0x0cde, 0x0006)},   /* Medion MD40900 */
+	{USB_DEVICE(0x0cde, 0x0008)},	/* Sagem XG703A */
+	{USB_DEVICE(0x0d8e, 0x3762)},	/* DLink DWL-G120 Cohiba */
+	{USB_DEVICE(0x09aa, 0x1000)},	/* Spinnaker Proto board */
+	{USB_DEVICE(0x1435, 0x0427)},	/* Inventel UR054G */
+	{USB_DEVICE(0x2001, 0x3704)},	/* DLink DWL-G122 rev A2 */
+	{USB_DEVICE(0x413c, 0x8102)},	/* Spinnaker DUT */
+	{USB_DEVICE(0x413c, 0x8104)},	/* Cohiba Proto board */
+	{}
+};
+
+MODULE_DEVICE_TABLE(usb, p54u_table);
+
+static void p54u_rx_cb(struct urb *urb)
+{
+	struct sk_buff *skb = (struct sk_buff *) urb->context;
+	struct p54u_rx_info *info = (struct p54u_rx_info *)skb->cb;
+	struct ieee80211_hw *dev = info->dev;
+	struct p54u_priv *priv = dev->priv;
+
+	if (unlikely(urb->status)) {
+		info->urb = NULL;
+		usb_free_urb(urb);
+		return;
+	}
+
+	skb_unlink(skb, &priv->rx_queue);
+	skb_put(skb, urb->actual_length);
+	if (!priv->hw_type)
+		skb_pull(skb, sizeof(struct net2280_tx_hdr));
+
+	if (p54_rx(dev, skb)) {
+		skb = dev_alloc_skb(MAX_RX_SIZE);
+		if (unlikely(!skb)) {
+			usb_free_urb(urb);
+			/* TODO check rx queue length and refill *somewhere* */
+			return;
+		}
+
+		info = (struct p54u_rx_info *) skb->cb;
+		info->urb = urb;
+		info->dev = dev;
+		urb->transfer_buffer = skb_tail_pointer(skb);
+		urb->context = skb;
+		skb_queue_tail(&priv->rx_queue, skb);
+	} else {
+		skb_trim(skb, 0);
+		skb_queue_tail(&priv->rx_queue, skb);
+	}
+
+	usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+static void p54u_tx_cb(struct urb *urb)
+{
+	usb_free_urb(urb);
+}
+
+static void p54u_tx_free_cb(struct urb *urb)
+{
+	kfree(urb->transfer_buffer);
+	usb_free_urb(urb);
+}
+
+static int p54u_init_urbs(struct ieee80211_hw *dev)
+{
+	struct p54u_priv *priv = dev->priv;
+	struct urb *entry;
+	struct sk_buff *skb;
+	struct p54u_rx_info *info;
+
+	while (skb_queue_len(&priv->rx_queue) < 32) {
+		skb = __dev_alloc_skb(MAX_RX_SIZE, GFP_KERNEL);
+		if (!skb)
+			break;
+		entry = usb_alloc_urb(0, GFP_KERNEL);
+		if (!entry) {
+			kfree_skb(skb);
+			break;
+		}
+		usb_fill_bulk_urb(entry, priv->udev, usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), skb_tail_pointer(skb), MAX_RX_SIZE, p54u_rx_cb, skb);
+		info = (struct p54u_rx_info *) skb->cb;
+		info->urb = entry;
+		info->dev = dev;
+		skb_queue_tail(&priv->rx_queue, skb);
+		usb_submit_urb(entry, GFP_KERNEL);
+	}
+
+	return 0;
+}
+
+static void p54u_free_urbs(struct ieee80211_hw *dev)
+{
+	struct p54u_priv *priv = dev->priv;
+	struct p54u_rx_info *info;
+	struct sk_buff *skb;
+
+	while ((skb = skb_dequeue(&priv->rx_queue))) {
+		info = (struct p54u_rx_info *) skb->cb;
+		if (!info->urb)
+			continue;
+
+		usb_kill_urb(info->urb);
+		kfree_skb(skb);
+	}
+}
+
+static void p54u_tx_3887(struct ieee80211_hw *dev, struct p54_control_hdr *data,
+			 size_t len, int free_on_tx)
+{
+	struct p54u_priv *priv = dev->priv;
+	struct urb *addr_urb, *data_urb;
+
+	addr_urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!addr_urb)
+		return;
+
+	data_urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!data_urb) {
+		usb_free_urb(addr_urb);
+		return;
+	}
+
+	usb_fill_bulk_urb(addr_urb, priv->udev,
+		usb_sndbulkpipe(priv->udev, P54U_PIPE_DATA), &data->req_id,
+		sizeof(data->req_id), p54u_tx_cb, dev);
+	usb_fill_bulk_urb(data_urb, priv->udev,
+		usb_sndbulkpipe(priv->udev, P54U_PIPE_DATA), data, len,
+		free_on_tx ? p54u_tx_free_cb : p54u_tx_cb, dev);
+
+	usb_submit_urb(addr_urb, GFP_ATOMIC);
+	usb_submit_urb(data_urb, GFP_ATOMIC);
+}
+
+static void p54u_tx_net2280(struct ieee80211_hw *dev, struct p54_control_hdr *data,
+			    size_t len, int free_on_tx)
+{
+	struct p54u_priv *priv = dev->priv;
+	struct urb *int_urb, *data_urb;
+	struct net2280_tx_hdr *hdr;
+	struct net2280_reg_write *reg;
+
+	reg = kmalloc(sizeof(*reg), GFP_ATOMIC);
+	if (!reg)
+		return;
+
+	int_urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!int_urb) {
+		kfree(reg);
+		return;
+	}
+
+	data_urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!data_urb) {
+		kfree(reg);
+		usb_free_urb(int_urb);
+		return;
+	}
+
+	reg->port = cpu_to_le16(NET2280_DEV_U32);
+	reg->addr = cpu_to_le32(P54U_DEV_BASE);
+	reg->val = cpu_to_le32(ISL38XX_DEV_INT_DATA);
+
+	len += sizeof(*data);
+	hdr = (void *)data - sizeof(*hdr);
+	memset(hdr, 0, sizeof(*hdr));
+	hdr->device_addr = data->req_id;
+	hdr->len = cpu_to_le16(len);
+
+	usb_fill_bulk_urb(int_urb, priv->udev,
+		usb_sndbulkpipe(priv->udev, P54U_PIPE_DEV), reg, sizeof(*reg),
+		p54u_tx_free_cb, dev);
+	usb_submit_urb(int_urb, GFP_ATOMIC);
+
+	usb_fill_bulk_urb(data_urb, priv->udev,
+		usb_sndbulkpipe(priv->udev, P54U_PIPE_DATA), hdr, len + sizeof(*hdr),
+		free_on_tx ? p54u_tx_free_cb : p54u_tx_cb, dev);
+	usb_submit_urb(data_urb, GFP_ATOMIC);
+}
+
+static int p54u_write(struct p54u_priv *priv,
+		      struct net2280_reg_write *buf,
+		      enum net2280_op_type type,
+		      __le32 addr, __le32 val)
+{
+	unsigned int ep;
+	int alen;
+
+	if (type & 0x0800)
+		ep = usb_sndbulkpipe(priv->udev, P54U_PIPE_DEV);
+	else
+		ep = usb_sndbulkpipe(priv->udev, P54U_PIPE_BRG);
+
+	buf->port = cpu_to_le16(type);
+	buf->addr = addr;
+	buf->val = val;
+
+	return usb_bulk_msg(priv->udev, ep, buf, sizeof(*buf), &alen, 1000);
+}
+
+static int p54u_read(struct p54u_priv *priv, void *buf,
+		     enum net2280_op_type type,
+		     __le32 addr, __le32 *val)
+{
+	struct net2280_reg_read *read = buf;
+	__le32 *reg = buf;
+	unsigned int ep;
+	int alen, err;
+
+	if (type & 0x0800)
+		ep = P54U_PIPE_DEV;
+	else
+		ep = P54U_PIPE_BRG;
+
+	read->port = cpu_to_le16(type);
+	read->addr = addr;
+
+	err = usb_bulk_msg(priv->udev, usb_sndbulkpipe(priv->udev, ep),
+			   read, sizeof(*read), &alen, 1000);
+	if (err)
+		return err;
+
+	err = usb_bulk_msg(priv->udev, usb_rcvbulkpipe(priv->udev, ep),
+			   reg, sizeof(*reg), &alen, 1000);
+	if (err)
+		return err;
+
+	*val = *reg;
+	return 0;
+}
+
+static int p54u_bulk_msg(struct p54u_priv *priv, unsigned int ep,
+			 void *data, size_t len)
+{
+	int alen;
+	return usb_bulk_msg(priv->udev, usb_sndbulkpipe(priv->udev, ep),
+			    data, len, &alen, 2000);
+}
+
+static int p54u_read_eeprom(struct ieee80211_hw *dev)
+{
+	struct p54u_priv *priv = dev->priv;
+	void *buf;
+	struct p54_control_hdr *hdr;
+	int err, alen;
+	size_t offset = priv->hw_type ? 0x10 : 0x20;
+
+	buf = kmalloc(0x2020, GFP_KERNEL);
+	if (!buf) {
+		printk(KERN_ERR "prism54usb: cannot allocate memory for"
+		       "eeprom readback!\n");
+		return -ENOMEM;
+	}
+
+	if (priv->hw_type) {
+		*((u32 *) buf) = priv->common.rx_start;
+		err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, sizeof(u32));
+		if (err) {
+			printk(KERN_ERR "prism54usb: addr send failed\n");
+			goto fail;
+		}
+	} else {
+		struct net2280_reg_write *reg = buf;
+		reg->port = cpu_to_le16(NET2280_DEV_U32);
+		reg->addr = cpu_to_le32(P54U_DEV_BASE);
+		reg->val = cpu_to_le32(ISL38XX_DEV_INT_DATA);
+		err = p54u_bulk_msg(priv, P54U_PIPE_DEV, buf, sizeof(*reg));
+		if (err) {
+			printk(KERN_ERR "prism54usb: dev_int send failed\n");
+			goto fail;
+		}
+	}
+
+	hdr = buf + priv->common.tx_hdr_len;
+	p54_fill_eeprom_readback(hdr);
+	hdr->req_id = cpu_to_le32(priv->common.rx_start);
+	if (priv->common.tx_hdr_len) {
+		struct net2280_tx_hdr *tx_hdr = buf;
+		tx_hdr->device_addr = hdr->req_id;
+		tx_hdr->len = cpu_to_le16(EEPROM_READBACK_LEN);
+	}
+
+	/* we can just pretend to send 0x2000 bytes of nothing in the headers */
+	err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf,
+			    EEPROM_READBACK_LEN + priv->common.tx_hdr_len);
+	if (err) {
+		printk(KERN_ERR "prism54usb: eeprom req send failed\n");
+		goto fail;
+	}
+
+	err = usb_bulk_msg(priv->udev,
+			   usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA),
+			   buf, 0x2020, &alen, 1000);
+	if (!err && alen > offset) {
+		p54_parse_eeprom(dev, (u8 *)buf + offset, alen - offset);
+	} else {
+		printk(KERN_ERR "prism54usb: eeprom read failed!\n");
+		err = -EINVAL;
+		goto fail;
+	}
+
+ fail:
+	kfree(buf);
+	return err;
+}
+
+static int p54u_upload_firmware_3887(struct ieee80211_hw *dev)
+{
+	static char start_string[] = "~~~~<\r";
+	struct p54u_priv *priv = dev->priv;
+	const struct firmware *fw_entry = NULL;
+	int err, alen;
+	u8 carry = 0;
+	u8 *buf, *tmp, *data;
+	unsigned int left, remains, block_size;
+	struct x2_header *hdr;
+	unsigned long timeout;
+
+	tmp = buf = kmalloc(P54U_FW_BLOCK, GFP_KERNEL);
+	if (!buf) {
+		printk(KERN_ERR "p54usb: cannot allocate firmware upload buffer!\n");
+		err = -ENOMEM;
+		goto err_bufalloc;
+	}
+
+	memcpy(buf, start_string, 4);
+	err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, 4);
+	if (err) {
+		printk(KERN_ERR "p54usb: reset failed! (%d)\n", err);
+		goto err_reset;
+	}
+
+	err = request_firmware(&fw_entry, "isl3887usb_bare", &priv->udev->dev);
+	if (err) {
+		printk(KERN_ERR "p54usb: cannot find firmware (isl3887usb_bare)!\n");
+		goto err_req_fw_failed;
+	}
+
+	p54_parse_firmware(dev, fw_entry);
+
+	left = block_size = min((size_t)P54U_FW_BLOCK, fw_entry->size);
+	strcpy(buf, start_string);
+	left -= strlen(start_string);
+	tmp += strlen(start_string);
+
+	data = fw_entry->data;
+	remains = fw_entry->size;
+
+	hdr = (struct x2_header *)(buf + strlen(start_string));
+	memcpy(hdr->signature, X2_SIGNATURE, X2_SIGNATURE_SIZE);
+	hdr->fw_load_addr = cpu_to_le32(ISL38XX_DEV_FIRMWARE_ADDR);
+	hdr->fw_length = cpu_to_le32(fw_entry->size);
+	hdr->crc = cpu_to_le32(~crc32_le(~0, (void *)&hdr->fw_load_addr,
+					 sizeof(u32)*2));
+	left -= sizeof(*hdr);
+	tmp += sizeof(*hdr);
+
+	while (remains) {
+		while (left--) {
+			if (carry) {
+				*tmp++ = carry;
+				carry = 0;
+				remains--;
+				continue;
+			}
+			switch (*data) {
+			case '~':
+				*tmp++ = '}';
+				carry = '^';
+				break;
+			case '}':
+				*tmp++ = '}';
+				carry = ']';
+				break;
+			default:
+				*tmp++ = *data;
+				remains--;
+				break;
+			}
+			data++;
+		}
+
+		err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, block_size);
+		if (err) {
+			printk(KERN_ERR "prism54usb: firmware upload failed!\n");
+			goto err_upload_failed;
+		}
+
+		tmp = buf;
+		left = block_size = min((unsigned int)P54U_FW_BLOCK, remains);
+	}
+
+	*((__le32 *)buf) = cpu_to_le32(~crc32_le(~0, fw_entry->data, fw_entry->size));
+	err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, sizeof(u32));
+	if (err) {
+		printk(KERN_ERR "prism54usb: firmware upload failed!\n");
+		goto err_upload_failed;
+	}
+
+	timeout = jiffies + msecs_to_jiffies(1000);
+	while (!(err = usb_bulk_msg(priv->udev,
+		usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), buf, 128, &alen, 1000))) {
+		if (alen > 2 && !memcmp(buf, "OK", 2))
+			break;
+
+		if (alen > 5 && !memcmp(buf, "ERROR", 5)) {
+			printk(KERN_INFO "prism54usb: firmware upload failed!\n");
+			err = -EINVAL;
+			break;
+		}
+
+		if (time_after(jiffies, timeout)) {
+			printk(KERN_ERR "prism54usb: firmware boot timed out!\n");
+			err = -ETIMEDOUT;
+			break;
+		}
+	}
+	if (err)
+		goto err_upload_failed;
+
+	buf[0] = 'g';
+	buf[1] = '\r';
+	err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, 2);
+	if (err) {
+		printk(KERN_ERR "prism54usb: firmware boot failed!\n");
+		goto err_upload_failed;
+	}
+
+	timeout = jiffies + msecs_to_jiffies(1000);
+	while (!(err = usb_bulk_msg(priv->udev,
+		usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), buf, 128, &alen, 1000))) {
+		if (alen > 0 && buf[0] == 'g')
+			break;
+
+		if (time_after(jiffies, timeout)) {
+			err = -ETIMEDOUT;
+			break;
+		}
+	}
+	if (err)
+		goto err_upload_failed;
+
+  err_upload_failed:
+	release_firmware(fw_entry);
+  err_req_fw_failed:
+  err_reset:
+	kfree(buf);
+  err_bufalloc:
+	return err;
+}
+
+static int p54u_upload_firmware_net2280(struct ieee80211_hw *dev)
+{
+	struct p54u_priv *priv = dev->priv;
+	const struct firmware *fw_entry = NULL;
+	const struct p54p_csr *devreg = (const struct p54p_csr *) P54U_DEV_BASE;
+	int err, alen;
+	void *buf;
+	__le32 reg;
+	unsigned int remains, offset;
+	u8 *data;
+
+	buf = kmalloc(512, GFP_KERNEL);
+	if (!buf) {
+		printk(KERN_ERR "p54usb: firmware buffer alloc failed!\n");
+		return -ENOMEM;
+	}
+
+	err = request_firmware(&fw_entry, "isl3890usb", &priv->udev->dev);
+	if (err) {
+		printk(KERN_ERR "p54usb: cannot find firmware (isl3890usb)!\n");
+		kfree(buf);
+		return err;
+	}
+
+	p54_parse_firmware(dev, fw_entry);
+
+#define P54U_WRITE(type, addr, data) \
+	do {\
+		err = p54u_write(priv, buf, type,\
+				 cpu_to_le32((u32)(unsigned long)addr), data);\
+		if (err) \
+			goto fail;\
+	} while (0)
+
+#define P54U_READ(type, addr) \
+	do {\
+		err = p54u_read(priv, buf, type,\
+				cpu_to_le32((u32)(unsigned long)addr), &reg);\
+		if (err)\
+			goto fail;\
+	} while (0)
+
+	/* power down net2280 bridge */
+	P54U_READ(NET2280_BRG_U32, NET2280_GPIOCTL);
+	reg |= cpu_to_le32(P54U_BRG_POWER_DOWN);
+	reg &= cpu_to_le32(~P54U_BRG_POWER_UP);
+	P54U_WRITE(NET2280_BRG_U32, NET2280_GPIOCTL, reg);
+
+	mdelay(100);
+
+	/* power up bridge */
+	reg |= cpu_to_le32(P54U_BRG_POWER_UP);
+	reg &= cpu_to_le32(~P54U_BRG_POWER_DOWN);
+	P54U_WRITE(NET2280_BRG_U32, NET2280_GPIOCTL, reg);
+
+	mdelay(100);
+
+	P54U_WRITE(NET2280_BRG_U32, NET2280_DEVINIT,
+		   cpu_to_le32(NET2280_CLK_30Mhz |
+			       NET2280_PCI_ENABLE |
+			       NET2280_PCI_SOFT_RESET));
+
+	mdelay(20);
+
+	P54U_WRITE(NET2280_BRG_CFG_U16, PCI_COMMAND,
+		   cpu_to_le32(PCI_COMMAND_MEMORY |
+			       PCI_COMMAND_MASTER));
+
+	P54U_WRITE(NET2280_BRG_CFG_U32, PCI_BASE_ADDRESS_0,
+		   cpu_to_le32(NET2280_BASE));
+
+	P54U_READ(NET2280_BRG_CFG_U16, PCI_STATUS);
+	reg |= cpu_to_le32(PCI_STATUS_REC_MASTER_ABORT);
+	P54U_WRITE(NET2280_BRG_CFG_U16, PCI_STATUS, reg);
+
+	// TODO: we really need this?
+	P54U_READ(NET2280_BRG_U32, NET2280_RELNUM);
+
+	P54U_WRITE(NET2280_BRG_U32, NET2280_EPA_RSP,
+		   cpu_to_le32(NET2280_CLEAR_NAK_OUT_PACKETS_MODE));
+	P54U_WRITE(NET2280_BRG_U32, NET2280_EPC_RSP,
+		   cpu_to_le32(NET2280_CLEAR_NAK_OUT_PACKETS_MODE));
+
+	P54U_WRITE(NET2280_BRG_CFG_U32, PCI_BASE_ADDRESS_2,
+		   cpu_to_le32(NET2280_BASE2));
+
+	/* finally done setting up the bridge */
+
+	P54U_WRITE(NET2280_DEV_CFG_U16, 0x10000 | PCI_COMMAND,
+		   cpu_to_le32(PCI_COMMAND_MEMORY |
+			       PCI_COMMAND_MASTER));
+
+	P54U_WRITE(NET2280_DEV_CFG_U16, 0x10000 | 0x40 /* TRDY timeout */, 0);
+	P54U_WRITE(NET2280_DEV_CFG_U32, 0x10000 | PCI_BASE_ADDRESS_0,
+		   cpu_to_le32(P54U_DEV_BASE));
+
+	P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1, 0);
+	P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
+		   cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
+
+	/* do romboot */
+	P54U_WRITE(NET2280_DEV_U32, &devreg->int_enable, 0);
+
+	P54U_READ(NET2280_DEV_U32, &devreg->ctrl_stat);
+	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
+	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RAMBOOT);
+	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
+
+	mdelay(20);
+
+	reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
+
+	mdelay(20);
+
+	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
+
+	mdelay(100);
+
+	P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
+
+	/* finally, we can upload firmware now! */
+	remains = fw_entry->size;
+	data = fw_entry->data;
+	offset = ISL38XX_DEV_FIRMWARE_ADDR;
+
+	while (remains) {
+		unsigned int block_len = min(remains, (unsigned int)512);
+		memcpy(buf, data, block_len);
+
+		err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, block_len);
+		if (err) {
+			printk(KERN_ERR "prism54usb: firmware block upload "
+			       "failed\n");
+			goto fail;
+		}
+
+		P54U_WRITE(NET2280_DEV_U32, &devreg->direct_mem_base,
+			   cpu_to_le32(0xc0000f00));
+
+		P54U_WRITE(NET2280_DEV_U32,
+			   0x0020 | (unsigned long)&devreg->direct_mem_win, 0);
+		P54U_WRITE(NET2280_DEV_U32,
+			   0x0020 | (unsigned long)&devreg->direct_mem_win,
+			   cpu_to_le32(1));
+
+		P54U_WRITE(NET2280_DEV_U32,
+			   0x0024 | (unsigned long)&devreg->direct_mem_win,
+			   cpu_to_le32(block_len));
+		P54U_WRITE(NET2280_DEV_U32,
+			   0x0028 | (unsigned long)&devreg->direct_mem_win,
+			   cpu_to_le32(offset));
+
+		P54U_WRITE(NET2280_DEV_U32, &devreg->dma_addr,
+			   cpu_to_le32(NET2280_EPA_FIFO_PCI_ADDR));
+		P54U_WRITE(NET2280_DEV_U32, &devreg->dma_len,
+			   cpu_to_le32(block_len >> 2));
+		P54U_WRITE(NET2280_DEV_U32, &devreg->dma_ctrl,
+			   cpu_to_le32(ISL38XX_DMA_MASTER_CONTROL_TRIGGER));
+
+		mdelay(10);
+
+		P54U_READ(NET2280_DEV_U32,
+			  0x002C | (unsigned long)&devreg->direct_mem_win);
+		if (!(reg & cpu_to_le32(ISL38XX_DMA_STATUS_DONE)) ||
+		    !(reg & cpu_to_le32(ISL38XX_DMA_STATUS_READY))) {
+			printk(KERN_ERR "prism54usb: firmware DMA transfer "
+			       "failed\n");
+			goto fail;
+		}
+
+		P54U_WRITE(NET2280_BRG_U32, NET2280_EPA_STAT,
+			   cpu_to_le32(NET2280_FIFO_FLUSH));
+
+		remains -= block_len;
+		data += block_len;
+		offset += block_len;
+	}
+
+	/* do ramboot */
+	P54U_READ(NET2280_DEV_U32, &devreg->ctrl_stat);
+	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
+	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
+	reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RAMBOOT);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
+
+	mdelay(20);
+
+	reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
+
+	reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
+
+	mdelay(100);
+
+	P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
+
+	/* start up the firmware */
+	P54U_WRITE(NET2280_DEV_U32, &devreg->int_enable,
+		   cpu_to_le32(ISL38XX_INT_IDENT_INIT));
+
+	P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
+		   cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
+
+	P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1,
+		   cpu_to_le32(NET2280_PCI_INTA_INTERRUPT_ENABLE |
+			       NET2280_USB_INTERRUPT_ENABLE));
+
+	P54U_WRITE(NET2280_DEV_U32, &devreg->dev_int,
+		   cpu_to_le32(ISL38XX_DEV_INT_RESET));
+
+	err = usb_interrupt_msg(priv->udev,
+				usb_rcvbulkpipe(priv->udev, P54U_PIPE_INT),
+				buf, sizeof(__le32), &alen, 1000);
+	if (err || alen != sizeof(__le32))
+		goto fail;
+
+	P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
+	P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
+
+	if (!(reg & cpu_to_le32(ISL38XX_INT_IDENT_INIT)))
+		err = -EINVAL;
+
+	P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1, 0);
+	P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
+		   cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
+
+#undef P54U_WRITE
+#undef P54U_READ
+
+ fail:
+	release_firmware(fw_entry);
+	kfree(buf);
+	return err;
+}
+
+static int p54u_open(struct ieee80211_hw *dev)
+{
+	struct p54u_priv *priv = dev->priv;
+	int err;
+
+	err = p54u_init_urbs(dev);
+	if (err) {
+		return err;
+	}
+
+	priv->common.open = p54u_init_urbs;
+
+	return 0;
+}
+
+static void p54u_stop(struct ieee80211_hw *dev)
+{
+	/* TODO: figure out how to reliably stop the 3887 and net2280 so
+	   the hardware is still usable next time we want to start it.
+	   until then, we just stop listening to the hardware.. */
+	p54u_free_urbs(dev);
+	return;
+}
+
+static int __devinit p54u_probe(struct usb_interface *intf,
+				const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct ieee80211_hw *dev;
+	struct p54u_priv *priv;
+	int err;
+	unsigned int i, recognized_pipes;
+	DECLARE_MAC_BUF(mac);
+
+	dev = p54_init_common(sizeof(*priv));
+	if (!dev) {
+		printk(KERN_ERR "prism54usb: ieee80211 alloc failed\n");
+		return -ENOMEM;
+	}
+
+	priv = dev->priv;
+
+	SET_IEEE80211_DEV(dev, &intf->dev);
+	usb_set_intfdata(intf, dev);
+	priv->udev = udev;
+
+	usb_get_dev(udev);
+
+	/* really lazy and simple way of figuring out if we're a 3887 */
+	/* TODO: should just stick the identification in the device table */
+	i = intf->altsetting->desc.bNumEndpoints;
+	recognized_pipes = 0;
+	while (i--) {
+		switch (intf->altsetting->endpoint[i].desc.bEndpointAddress) {
+		case P54U_PIPE_DATA:
+		case P54U_PIPE_MGMT:
+		case P54U_PIPE_BRG:
+		case P54U_PIPE_DEV:
+		case P54U_PIPE_DATA | USB_DIR_IN:
+		case P54U_PIPE_MGMT | USB_DIR_IN:
+		case P54U_PIPE_BRG | USB_DIR_IN:
+		case P54U_PIPE_DEV | USB_DIR_IN:
+		case P54U_PIPE_INT | USB_DIR_IN:
+			recognized_pipes++;
+		}
+	}
+	priv->common.open = p54u_open;
+
+	if (recognized_pipes < P54U_PIPE_NUMBER) {
+		priv->hw_type = P54U_3887;
+		priv->common.tx = p54u_tx_3887;
+	} else {
+		dev->extra_tx_headroom += sizeof(struct net2280_tx_hdr);
+		priv->common.tx_hdr_len = sizeof(struct net2280_tx_hdr);
+		priv->common.tx = p54u_tx_net2280;
+	}
+	priv->common.stop = p54u_stop;
+
+	if (priv->hw_type)
+		err = p54u_upload_firmware_3887(dev);
+	else
+		err = p54u_upload_firmware_net2280(dev);
+	if (err)
+		goto err_free_dev;
+
+	err = p54u_read_eeprom(dev);
+	if (err)
+		goto err_free_dev;
+
+	if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
+		u8 perm_addr[ETH_ALEN];
+
+		printk(KERN_WARNING "prism54usb: Invalid hwaddr! Using randomly generated MAC addr\n");
+		random_ether_addr(perm_addr);
+		SET_IEEE80211_PERM_ADDR(dev, perm_addr);
+	}
+
+	skb_queue_head_init(&priv->rx_queue);
+
+	err = ieee80211_register_hw(dev);
+	if (err) {
+		printk(KERN_ERR "prism54usb: Cannot register netdevice\n");
+		goto err_free_dev;
+	}
+
+	printk(KERN_INFO "%s: hwaddr %s, isl38%02x\n",
+	       wiphy_name(dev->wiphy),
+	       print_mac(mac, dev->wiphy->perm_addr),
+	       priv->common.version);
+
+	return 0;
+
+ err_free_dev:
+	ieee80211_free_hw(dev);
+	usb_set_intfdata(intf, NULL);
+	usb_put_dev(udev);
+	return err;
+}
+
+static void __devexit p54u_disconnect(struct usb_interface *intf)
+{
+	struct ieee80211_hw *dev = usb_get_intfdata(intf);
+	struct p54u_priv *priv;
+
+	if (!dev)
+		return;
+
+	ieee80211_unregister_hw(dev);
+
+	priv = dev->priv;
+	usb_put_dev(interface_to_usbdev(intf));
+	p54_free_common(dev);
+	ieee80211_free_hw(dev);
+}
+
+static struct usb_driver p54u_driver = {
+	.name	= "prism54usb",
+	.id_table = p54u_table,
+	.probe = p54u_probe,
+	.disconnect = p54u_disconnect,
+};
+
+static int __init p54u_init(void)
+{
+	return usb_register(&p54u_driver);
+}
+
+static void __exit p54u_exit(void)
+{
+	usb_deregister(&p54u_driver);
+}
+
+module_init(p54u_init);
+module_exit(p54u_exit);