p54usb.c

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/*
 * Linux device driver for USB based Prism54
 *
 * Copyright (c) 2006, Michael Wu <[e-mail]>
 *
 * Based on the islsm (softmac prism54) driver, which is:
 * Copyright 2004-2006 Jean-Baptiste Note <[e-mail]>, 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 <[e-mail]>");
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(0x13B1, 0x000C)},	/* Linksys WUSB54AG */
	{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));