[deliverable/linux.git] / drivers / net / wireless / libertas_tf / if_usb.c

/*
 *  Copyright (C) 2008, cozybit Inc.
 *  Copyright (C) 2003-2006, Marvell International Ltd.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 */
#include <linux/delay.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <linux/usb.h>

#define DRV_NAME "lbtf_usb"

#include "libertas_tf.h"
#include "if_usb.h"

#define MESSAGE_HEADER_LEN	4

static char *lbtf_fw_name = "lbtf_usb.bin";
module_param_named(fw_name, lbtf_fw_name, charp, 0644);

static struct usb_device_id if_usb_table[] = {
	/* Enter the device signature inside */
	{ USB_DEVICE(0x1286, 0x2001) },
	{ USB_DEVICE(0x05a3, 0x8388) },
	{}	/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, if_usb_table);

static void if_usb_receive(struct urb *urb);
static void if_usb_receive_fwload(struct urb *urb);
static int if_usb_prog_firmware(struct if_usb_card *cardp);
static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
			       uint8_t *payload, uint16_t nb);
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
			uint16_t nb, u8 data);
static void if_usb_free(struct if_usb_card *cardp);
static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
static int if_usb_reset_device(struct if_usb_card *cardp);

/**
 *  if_usb_wrike_bulk_callback -  call back to handle URB status
 *
 *  @param urb 		pointer to urb structure
 */
static void if_usb_write_bulk_callback(struct urb *urb)
{
	if (urb->status != 0)
		printk(KERN_INFO "libertastf: URB in failure status: %d\n",
		       urb->status);
}

/**
 *  if_usb_free - free tx/rx urb, skb and rx buffer
 *
 *  @param cardp	pointer if_usb_card
 */
static void if_usb_free(struct if_usb_card *cardp)
{
	/* Unlink tx & rx urb */
	usb_kill_urb(cardp->tx_urb);
	usb_kill_urb(cardp->rx_urb);
	usb_kill_urb(cardp->cmd_urb);

	usb_free_urb(cardp->tx_urb);
	cardp->tx_urb = NULL;

	usb_free_urb(cardp->rx_urb);
	cardp->rx_urb = NULL;

	usb_free_urb(cardp->cmd_urb);
	cardp->cmd_urb = NULL;

	kfree(cardp->ep_out_buf);
	cardp->ep_out_buf = NULL;
}

static void if_usb_setup_firmware(struct lbtf_private *priv)
{
	struct if_usb_card *cardp = priv->card;
	struct cmd_ds_set_boot2_ver b2_cmd;

	if_usb_submit_rx_urb(cardp);
	b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
	b2_cmd.action = 0;
	b2_cmd.version = cardp->boot2_version;

	if (lbtf_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
		printk(KERN_INFO "libertastf: setting boot2 version failed\n");
}

static void if_usb_fw_timeo(unsigned long priv)
{
	struct if_usb_card *cardp = (void *)priv;

	if (!cardp->fwdnldover)
		/* Download timed out */
		cardp->priv->surpriseremoved = 1;
	wake_up(&cardp->fw_wq);
}

/**
 *  if_usb_probe - sets the configuration values
 *
 *  @ifnum	interface number
 *  @id		pointer to usb_device_id
 *
 *  Returns: 0 on success, error code on failure
 */
static int if_usb_probe(struct usb_interface *intf,
			const struct usb_device_id *id)
{
	struct usb_device *udev;
	struct usb_host_interface *iface_desc;
	struct usb_endpoint_descriptor *endpoint;
	struct lbtf_private *priv;
	struct if_usb_card *cardp;
	int i;

	udev = interface_to_usbdev(intf);

	cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
	if (!cardp)
		goto error;

	setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
	init_waitqueue_head(&cardp->fw_wq);

	cardp->udev = udev;
	iface_desc = intf->cur_altsetting;

	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		endpoint = &iface_desc->endpoint[i].desc;
		if (usb_endpoint_is_bulk_in(endpoint)) {
			cardp->ep_in_size =
				le16_to_cpu(endpoint->wMaxPacketSize);
			cardp->ep_in = usb_endpoint_num(endpoint);
		} else if (usb_endpoint_is_bulk_out(endpoint)) {
			cardp->ep_out_size =
				le16_to_cpu(endpoint->wMaxPacketSize);
			cardp->ep_out = usb_endpoint_num(endpoint);
		}
	}
	if (!cardp->ep_out_size || !cardp->ep_in_size)
		/* Endpoints not found */
		goto dealloc;

	cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!cardp->rx_urb)
		goto dealloc;

	cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!cardp->tx_urb)
		goto dealloc;

	cardp->cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!cardp->cmd_urb)
		goto dealloc;

	cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
				    GFP_KERNEL);
	if (!cardp->ep_out_buf)
		goto dealloc;

	priv = lbtf_add_card(cardp, &udev->dev);
	if (!priv)
		goto dealloc;

	cardp->priv = priv;

	priv->hw_host_to_card = if_usb_host_to_card;
	priv->hw_prog_firmware = if_usb_prog_firmware;
	priv->hw_reset_device = if_usb_reset_device;
	cardp->boot2_version = udev->descriptor.bcdDevice;

	usb_get_dev(udev);
	usb_set_intfdata(intf, cardp);

	return 0;

dealloc:
	if_usb_free(cardp);
error:
	return -ENOMEM;
}

/**
 *  if_usb_disconnect -  free resource and cleanup
 *
 *  @intf	USB interface structure
 */
static void if_usb_disconnect(struct usb_interface *intf)
{
	struct if_usb_card *cardp = usb_get_intfdata(intf);
	struct lbtf_private *priv = (struct lbtf_private *) cardp->priv;

	if_usb_reset_device(cardp);

	if (priv)
		lbtf_remove_card(priv);

	/* Unlink and free urb */
	if_usb_free(cardp);

	usb_set_intfdata(intf, NULL);
	usb_put_dev(interface_to_usbdev(intf));
}

/**
 *  if_usb_send_fw_pkt -  This function downloads the FW
 *
 *  @priv	pointer to struct lbtf_private
 *
 *  Returns: 0
 */
static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
{
	struct fwdata *fwdata = cardp->ep_out_buf;
	u8 *firmware = (u8 *) cardp->fw->data;

	/* If we got a CRC failure on the last block, back
	   up and retry it */
	if (!cardp->CRC_OK) {
		cardp->totalbytes = cardp->fwlastblksent;
		cardp->fwseqnum--;
	}

	/* struct fwdata (which we sent to the card) has an
	   extra __le32 field in between the header and the data,
	   which is not in the struct fwheader in the actual
	   firmware binary. Insert the seqnum in the middle... */
	memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
	       sizeof(struct fwheader));

	cardp->fwlastblksent = cardp->totalbytes;
	cardp->totalbytes += sizeof(struct fwheader);

	memcpy(fwdata->data, &firmware[cardp->totalbytes],
	       le32_to_cpu(fwdata->hdr.datalength));

	fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
	cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);

	usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
		     le32_to_cpu(fwdata->hdr.datalength), 0);

	if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK))
		/* Host has finished FW downloading
		 * Donwloading FW JUMP BLOCK
		 */
		cardp->fwfinalblk = 1;

	return 0;
}

static int if_usb_reset_device(struct if_usb_card *cardp)
{
	struct cmd_ds_802_11_reset *cmd = cardp->ep_out_buf + 4;
	int ret;

	*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);

	cmd->hdr.command = cpu_to_le16(CMD_802_11_RESET);
	cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_802_11_reset));
	cmd->hdr.result = cpu_to_le16(0);
	cmd->hdr.seqnum = cpu_to_le16(0x5a5a);
	cmd->action = cpu_to_le16(CMD_ACT_HALT);
	usb_tx_block(cardp, cardp->ep_out_buf,
		     4 + sizeof(struct cmd_ds_802_11_reset), 0);

	msleep(100);
	ret = usb_reset_device(cardp->udev);
	msleep(100);

	return ret;
}
EXPORT_SYMBOL_GPL(if_usb_reset_device);

/**
 *  usb_tx_block - transfer data to the device
 *
 *  @priv 	pointer to struct lbtf_private
 *  @payload	pointer to payload data
 *  @nb		data length
 *  @data	non-zero for data, zero for commands
 *
 *  Returns: 0 on success, nonzero otherwise.
 */
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
			uint16_t nb, u8 data)
{
	struct urb *urb;

	/* check if device is removed */
	if (cardp->priv->surpriseremoved)
		return -1;

	if (data)
		urb = cardp->tx_urb;
	else
		urb = cardp->cmd_urb;

	usb_fill_bulk_urb(urb, cardp->udev,
			  usb_sndbulkpipe(cardp->udev,
					  cardp->ep_out),
			  payload, nb, if_usb_write_bulk_callback, cardp);

	urb->transfer_flags |= URB_ZERO_PACKET;

	if (usb_submit_urb(urb, GFP_ATOMIC))
		return -1;
	return 0;
}

static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
				  void (*callbackfn)(struct urb *urb))
{
	struct sk_buff *skb;

	skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
	if (!skb)
		return -1;

	cardp->rx_skb = skb;

	/* Fill the receive configuration URB and initialise the Rx call back */
	usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
			  usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
			  skb_tail_pointer(skb),
			  MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn, cardp);

	cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;

	if (usb_submit_urb(cardp->rx_urb, GFP_ATOMIC)) {
		kfree_skb(skb);
		cardp->rx_skb = NULL;
		return -1;
	} else
		return 0;
}

static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
{
	return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
}

static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
{
	return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
}

static void if_usb_receive_fwload(struct urb *urb)
{
	struct if_usb_card *cardp = urb->context;
	struct sk_buff *skb = cardp->rx_skb;
	struct fwsyncheader *syncfwheader;
	struct bootcmdresp bcmdresp;

	if (urb->status) {
		kfree_skb(skb);
		return;
	}

	if (cardp->fwdnldover) {
		__le32 *tmp = (__le32 *)(skb->data);

		if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
		    tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY))
			/* Firmware ready event received */
			wake_up(&cardp->fw_wq);
		else
			if_usb_submit_rx_urb_fwload(cardp);
		kfree_skb(skb);
		return;
	}
	if (cardp->bootcmdresp <= 0) {
		memcpy(&bcmdresp, skb->data, sizeof(bcmdresp));

		if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
			kfree_skb(skb);
			if_usb_submit_rx_urb_fwload(cardp);
			cardp->bootcmdresp = 1;
			/* Received valid boot command response */
			return;
		}
		if (bcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
			if (bcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
			    bcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
			    bcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION))
				cardp->bootcmdresp = -1;
		} else if (bcmdresp.cmd == BOOT_CMD_FW_BY_USB &&
			   bcmdresp.result == BOOT_CMD_RESP_OK)
			cardp->bootcmdresp = 1;

		kfree_skb(skb);
		if_usb_submit_rx_urb_fwload(cardp);
		return;
	}

	syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
	if (!syncfwheader) {
		kfree_skb(skb);
		return;
	}

	memcpy(syncfwheader, skb->data, sizeof(struct fwsyncheader));

	if (!syncfwheader->cmd)
		cardp->CRC_OK = 1;
	else
		cardp->CRC_OK = 0;
	kfree_skb(skb);

	/* reschedule timer for 200ms hence */
	mod_timer(&cardp->fw_timeout, jiffies + (HZ/5));

	if (cardp->fwfinalblk) {
		cardp->fwdnldover = 1;
		goto exit;
	}

	if_usb_send_fw_pkt(cardp);

 exit:
	if_usb_submit_rx_urb_fwload(cardp);

	kfree(syncfwheader);

	return;
}

#define MRVDRV_MIN_PKT_LEN	30

static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
				       struct if_usb_card *cardp,
				       struct lbtf_private *priv)
{
	if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
	    || recvlength < MRVDRV_MIN_PKT_LEN) {
		kfree_skb(skb);
		return;
	}

	skb_put(skb, recvlength);
	skb_pull(skb, MESSAGE_HEADER_LEN);
	lbtf_rx(priv, skb);
}

static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
				      struct sk_buff *skb,
				      struct if_usb_card *cardp,
				      struct lbtf_private *priv)
{
	if (recvlength > LBS_CMD_BUFFER_SIZE) {
		kfree_skb(skb);
		return;
	}

	BUG_ON(!in_interrupt());

	spin_lock(&priv->driver_lock);
	memcpy(priv->cmd_resp_buff, recvbuff + MESSAGE_HEADER_LEN,
	       recvlength - MESSAGE_HEADER_LEN);
	kfree_skb(skb);
	lbtf_cmd_response_rx(priv);
	spin_unlock(&priv->driver_lock);
}

/**
 *  if_usb_receive - read data received from the device.
 *
 *  @urb		pointer to struct urb
 */
static void if_usb_receive(struct urb *urb)
{
	struct if_usb_card *cardp = urb->context;
	struct sk_buff *skb = cardp->rx_skb;
	struct lbtf_private *priv = cardp->priv;
	int recvlength = urb->actual_length;
	uint8_t *recvbuff = NULL;
	uint32_t recvtype = 0;
	__le32 *pkt = (__le32 *) skb->data;

	if (recvlength) {
		if (urb->status) {
			kfree_skb(skb);
			goto setup_for_next;
		}

		recvbuff = skb->data;
		recvtype = le32_to_cpu(pkt[0]);
	} else if (urb->status) {
		kfree_skb(skb);
		return;
	}

	switch (recvtype) {
	case CMD_TYPE_DATA:
		process_cmdtypedata(recvlength, skb, cardp, priv);
		break;

	case CMD_TYPE_REQUEST:
		process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
		break;

	case CMD_TYPE_INDICATION:
	{
		/* Event cause handling */
		u32 event_cause = le32_to_cpu(pkt[1]);

		/* Icky undocumented magic special case */
		if (event_cause & 0xffff0000) {
			u16 tmp;
			u8 retrycnt;
			u8 failure;

			tmp = event_cause >> 16;
			retrycnt = tmp & 0x00ff;
			failure = (tmp & 0xff00) >> 8;
			lbtf_send_tx_feedback(priv, retrycnt, failure);
		} else if (event_cause == LBTF_EVENT_BCN_SENT)
			lbtf_bcn_sent(priv);
		else
			printk(KERN_DEBUG
			       "Unsupported notification %d received\n",
			       event_cause);
		kfree_skb(skb);
		break;
	}
	default:
		printk(KERN_DEBUG "libertastf: unknown command type 0x%X\n",
			     recvtype);
		kfree_skb(skb);
		break;
	}

setup_for_next:
	if_usb_submit_rx_urb(cardp);
}

/**
 *  if_usb_host_to_card -  Download data to the device
 *
 *  @priv		pointer to struct lbtf_private structure
 *  @type		type of data
 *  @buf		pointer to data buffer
 *  @len		number of bytes
 *
 *  Returns: 0 on success, nonzero otherwise
 */
static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
			       uint8_t *payload, uint16_t nb)
{
	struct if_usb_card *cardp = priv->card;
	u8 data = 0;

	if (type == MVMS_CMD) {
		*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
	} else {
		*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
		data = 1;
	}

	memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);

	return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN,
			    data);
}

/**
 *  if_usb_issue_boot_command - Issue boot command to Boot2.
 *
 *  @ivalue   1 boots from FW by USB-Download, 2 boots from FW in EEPROM.
 *
 *  Returns: 0
 */
static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
{
	struct bootcmd *bootcmd = cardp->ep_out_buf;

	/* Prepare command */
	bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
	bootcmd->cmd = ivalue;
	memset(bootcmd->pad, 0, sizeof(bootcmd->pad));

	/* Issue command */
	usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd), 0);

	return 0;
}


/**
 *  check_fwfile_format - Check the validity of Boot2/FW image.
 *
 *  @data	pointer to image
 *  @totlen	image length
 *
 *  Returns: 0 if the image is valid, nonzero otherwise.
 */
static int check_fwfile_format(const u8 *data, u32 totlen)
{
	u32 bincmd, exit;
	u32 blksize, offset, len;
	int ret;

	ret = 1;
	exit = len = 0;

	do {
		struct fwheader *fwh = (void *) data;

		bincmd = le32_to_cpu(fwh->dnldcmd);
		blksize = le32_to_cpu(fwh->datalength);
		switch (bincmd) {
		case FW_HAS_DATA_TO_RECV:
			offset = sizeof(struct fwheader) + blksize;
			data += offset;
			len += offset;
			if (len >= totlen)
				exit = 1;
			break;
		case FW_HAS_LAST_BLOCK:
			exit = 1;
			ret = 0;
			break;
		default:
			exit = 1;
			break;
		}
	} while (!exit);

	if (ret)
		printk(KERN_INFO
		       "libertastf: firmware file format check failed\n");
	return ret;
}


static int if_usb_prog_firmware(struct if_usb_card *cardp)
{
	int i = 0;
	static int reset_count = 10;
	int ret = 0;

	ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
	if (ret < 0) {
		printk(KERN_INFO "libertastf: firmware %s not found\n",
		       lbtf_fw_name);
		goto done;
	}

	if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
		goto release_fw;

restart:
	if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
		ret = -1;
		goto release_fw;
	}

	cardp->bootcmdresp = 0;
	do {
		int j = 0;
		i++;
		/* Issue Boot command = 1, Boot from Download-FW */
		if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
		/* wait for command response */
		do {
			j++;
			msleep_interruptible(100);
		} while (cardp->bootcmdresp == 0 && j < 10);
	} while (cardp->bootcmdresp == 0 && i < 5);

	if (cardp->bootcmdresp <= 0) {
		if (--reset_count >= 0) {
			if_usb_reset_device(cardp);
			goto restart;
		}
		return -1;
	}

	i = 0;

	cardp->totalbytes = 0;
	cardp->fwlastblksent = 0;
	cardp->CRC_OK = 1;
	cardp->fwdnldover = 0;
	cardp->fwseqnum = -1;
	cardp->totalbytes = 0;
	cardp->fwfinalblk = 0;

	/* Send the first firmware packet... */
	if_usb_send_fw_pkt(cardp);

	/* ... and wait for the process to complete */
	wait_event_interruptible(cardp->fw_wq, cardp->priv->surpriseremoved ||
					       cardp->fwdnldover);

	del_timer_sync(&cardp->fw_timeout);
	usb_kill_urb(cardp->rx_urb);

	if (!cardp->fwdnldover) {
		printk(KERN_INFO "libertastf: failed to load fw,"
				 " resetting device!\n");
		if (--reset_count >= 0) {
			if_usb_reset_device(cardp);
			goto restart;
		}

		printk(KERN_INFO "libertastf: fw download failure\n");
		ret = -1;
		goto release_fw;
	}

	cardp->priv->fw_ready = 1;

 release_fw:
	release_firmware(cardp->fw);
	cardp->fw = NULL;

	if_usb_setup_firmware(cardp->priv);

 done:
	return ret;
}
EXPORT_SYMBOL_GPL(if_usb_prog_firmware);


#define if_usb_suspend NULL
#define if_usb_resume NULL

static struct usb_driver if_usb_driver = {
	.name = DRV_NAME,
	.probe = if_usb_probe,
	.disconnect = if_usb_disconnect,
	.id_table = if_usb_table,
	.suspend = if_usb_suspend,
	.resume = if_usb_resume,
};

static int __init if_usb_init_module(void)
{
	int ret = 0;

	ret = usb_register(&if_usb_driver);
	return ret;
}

static void __exit if_usb_exit_module(void)
{
	usb_deregister(&if_usb_driver);
}

module_init(if_usb_init_module);
module_exit(if_usb_exit_module);

MODULE_DESCRIPTION("8388 USB WLAN Thinfirm Driver");
MODULE_AUTHOR("Cozybit Inc.");
MODULE_LICENSE("GPL");
Commit	Line	Data
c305a19a LCC	1	/*
	2	* Copyright (C) 2008, cozybit Inc.
	3	* Copyright (C) 2003-2006, Marvell International Ltd.
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or (at
	8	* your option) any later version.
	9	*/
	10	#include <linux/delay.h>
	11	#include <linux/moduleparam.h>
	12	#include <linux/firmware.h>
	13	#include <linux/netdevice.h>
	14	#include <linux/usb.h>
	15
	16	#define DRV_NAME "lbtf_usb"
	17
	18	#include "libertas_tf.h"
	19	#include "if_usb.h"
	20
	21	#define MESSAGE_HEADER_LEN 4
	22
	23	static char *lbtf_fw_name = "lbtf_usb.bin";
	24	module_param_named(fw_name, lbtf_fw_name, charp, 0644);
	25
	26	static struct usb_device_id if_usb_table[] = {
	27	/* Enter the device signature inside */
	28	{ USB_DEVICE(0x1286, 0x2001) },
	29	{ USB_DEVICE(0x05a3, 0x8388) },
	30	{} /* Terminating entry */
	31	};
	32
	33	MODULE_DEVICE_TABLE(usb, if_usb_table);
	34
	35	static void if_usb_receive(struct urb *urb);
	36	static void if_usb_receive_fwload(struct urb *urb);
	37	static int if_usb_prog_firmware(struct if_usb_card *cardp);
	38	static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
	39	uint8_t *payload, uint16_t nb);
	40	static int usb_tx_block(struct if_usb_card cardp, uint8_t payload,
	41	uint16_t nb, u8 data);
	42	static void if_usb_free(struct if_usb_card *cardp);
	43	static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
	44	static int if_usb_reset_device(struct if_usb_card *cardp);
	45
	46	/**
	47	* if_usb_wrike_bulk_callback - call back to handle URB status
	48	*
	49	* @param urb pointer to urb structure
	50	*/
	51	static void if_usb_write_bulk_callback(struct urb *urb)
	52	{
	53	if (urb->status != 0)
	54	printk(KERN_INFO "libertastf: URB in failure status: %d\n",
	55	urb->status);
	56	}
	57
	58	/**
	59	* if_usb_free - free tx/rx urb, skb and rx buffer
	60	*
	61	* @param cardp pointer if_usb_card
	62	*/
	63	static void if_usb_free(struct if_usb_card *cardp)
	64	{
65	/* Unlink tx & rx urb */
66	usb_kill_urb(cardp->tx_urb);
67	usb_kill_urb(cardp->rx_urb);
68	usb_kill_urb(cardp->cmd_urb);
69
70	usb_free_urb(cardp->tx_urb);
71	cardp->tx_urb = NULL;
72
73	usb_free_urb(cardp->rx_urb);
74	cardp->rx_urb = NULL;
75
76	usb_free_urb(cardp->cmd_urb);
77	cardp->cmd_urb = NULL;
78
79	kfree(cardp->ep_out_buf);
80	cardp->ep_out_buf = NULL;
81	}
82
83	static void if_usb_setup_firmware(struct lbtf_private *priv)
84	{
85	struct if_usb_card *cardp = priv->card;
86	struct cmd_ds_set_boot2_ver b2_cmd;
87
88	if_usb_submit_rx_urb(cardp);
89	b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
90	b2_cmd.action = 0;
91	b2_cmd.version = cardp->boot2_version;
92
93	if (lbtf_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
94	printk(KERN_INFO "libertastf: setting boot2 version failed\n");
95	}
96
97	static void if_usb_fw_timeo(unsigned long priv)
98	{
99	struct if_usb_card cardp = (void )priv;
100
101	if (!cardp->fwdnldover)
102	/* Download timed out */
103	cardp->priv->surpriseremoved = 1;
104	wake_up(&cardp->fw_wq);
105	}
106
107	/**
108	* if_usb_probe - sets the configuration values
109	*
110	* @ifnum interface number
111	* @id pointer to usb_device_id
112	*
113	* Returns: 0 on success, error code on failure
114	*/
115	static int if_usb_probe(struct usb_interface *intf,
116	const struct usb_device_id *id)
117	{
118	struct usb_device *udev;
119	struct usb_host_interface *iface_desc;
120	struct usb_endpoint_descriptor *endpoint;
121	struct lbtf_private *priv;
122	struct if_usb_card *cardp;
123	int i;
124
125	udev = interface_to_usbdev(intf);
126
127	cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
128	if (!cardp)
129	goto error;
130
131	setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
132	init_waitqueue_head(&cardp->fw_wq);
133
134	cardp->udev = udev;
135	iface_desc = intf->cur_altsetting;
136
137	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
138	endpoint = &iface_desc->endpoint[i].desc;
139	if (usb_endpoint_is_bulk_in(endpoint)) {
140	cardp->ep_in_size =
141	le16_to_cpu(endpoint->wMaxPacketSize);
142	cardp->ep_in = usb_endpoint_num(endpoint);
143	} else if (usb_endpoint_is_bulk_out(endpoint)) {
144	cardp->ep_out_size =
145	le16_to_cpu(endpoint->wMaxPacketSize);
146	cardp->ep_out = usb_endpoint_num(endpoint);
147	}
148	}
149	if (!cardp->ep_out_size \|\| !cardp->ep_in_size)
150	/* Endpoints not found */
151	goto dealloc;
152
153	cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
154	if (!cardp->rx_urb)
155	goto dealloc;
156
157	cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
158	if (!cardp->tx_urb)
159	goto dealloc;
160
161	cardp->cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
162	if (!cardp->cmd_urb)
163	goto dealloc;
164
165	cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
166	GFP_KERNEL);
167	if (!cardp->ep_out_buf)
168	goto dealloc;
169
170	priv = lbtf_add_card(cardp, &udev->dev);
171	if (!priv)
172	goto dealloc;
173
174	cardp->priv = priv;
175
176	priv->hw_host_to_card = if_usb_host_to_card;
177	priv->hw_prog_firmware = if_usb_prog_firmware;
178	priv->hw_reset_device = if_usb_reset_device;
179	cardp->boot2_version = udev->descriptor.bcdDevice;
180
181	usb_get_dev(udev);
182	usb_set_intfdata(intf, cardp);
183
184	return 0;
185
186	dealloc:
187	if_usb_free(cardp);
188	error:
189	return -ENOMEM;
190	}
191
192	/**
193	* if_usb_disconnect - free resource and cleanup
194	*
195	* @intf USB interface structure
196	*/
197	static void if_usb_disconnect(struct usb_interface *intf)
198	{
199	struct if_usb_card *cardp = usb_get_intfdata(intf);
200	struct lbtf_private priv = (struct lbtf_private ) cardp->priv;
201
202	if_usb_reset_device(cardp);
203
204	if (priv)
205	lbtf_remove_card(priv);
206
207	/* Unlink and free urb */
208	if_usb_free(cardp);
209
210	usb_set_intfdata(intf, NULL);
211	usb_put_dev(interface_to_usbdev(intf));
212	}
213
214	/**
215	* if_usb_send_fw_pkt - This function downloads the FW
216	*
217	* @priv pointer to struct lbtf_private
218	*
219	* Returns: 0
220	*/
221	static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
222	{
223	struct fwdata *fwdata = cardp->ep_out_buf;
224	u8 firmware = (u8 ) cardp->fw->data;
225
226	/* If we got a CRC failure on the last block, back
227	up and retry it */
228	if (!cardp->CRC_OK) {
229	cardp->totalbytes = cardp->fwlastblksent;
230	cardp->fwseqnum--;
231	}
232
233	/* struct fwdata (which we sent to the card) has an
234	extra __le32 field in between the header and the data,
235	which is not in the struct fwheader in the actual
236	firmware binary. Insert the seqnum in the middle... */
237	memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
238	sizeof(struct fwheader));
239
240	cardp->fwlastblksent = cardp->totalbytes;
241	cardp->totalbytes += sizeof(struct fwheader);
242
243	memcpy(fwdata->data, &firmware[cardp->totalbytes],
244	le32_to_cpu(fwdata->hdr.datalength));
245
246	fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
247	cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);
248
249	usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
250	le32_to_cpu(fwdata->hdr.datalength), 0);
251
252	if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK))
253	/* Host has finished FW downloading
254	* Donwloading FW JUMP BLOCK
255	*/
256	cardp->fwfinalblk = 1;
257
258	return 0;
259	}
260
261	static int if_usb_reset_device(struct if_usb_card *cardp)
262	{
263	struct cmd_ds_802_11_reset *cmd = cardp->ep_out_buf + 4;
264	int ret;
265
266	(__le32 )cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
267
268	cmd->hdr.command = cpu_to_le16(CMD_802_11_RESET);
269	cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_802_11_reset));
270	cmd->hdr.result = cpu_to_le16(0);
271	cmd->hdr.seqnum = cpu_to_le16(0x5a5a);
272	cmd->action = cpu_to_le16(CMD_ACT_HALT);
273	usb_tx_block(cardp, cardp->ep_out_buf,
274	4 + sizeof(struct cmd_ds_802_11_reset), 0);
275
276	msleep(100);
277	ret = usb_reset_device(cardp->udev);
278	msleep(100);
279
280	return ret;
281	}
282	EXPORT_SYMBOL_GPL(if_usb_reset_device);
283
284	/**
285	* usb_tx_block - transfer data to the device
286	*
287	* @priv pointer to struct lbtf_private
288	* @payload pointer to payload data
289	* @nb data length
290	* @data non-zero for data, zero for commands
291	*
292	* Returns: 0 on success, nonzero otherwise.
293	*/
294	static int usb_tx_block(struct if_usb_card cardp, uint8_t payload,
295	uint16_t nb, u8 data)
296	{
297	struct urb *urb;
298
299	/* check if device is removed */
300	if (cardp->priv->surpriseremoved)
301	return -1;
302
303	if (data)
304	urb = cardp->tx_urb;
305	else
306	urb = cardp->cmd_urb;
307
308	usb_fill_bulk_urb(urb, cardp->udev,
309	usb_sndbulkpipe(cardp->udev,
310	cardp->ep_out),
311	payload, nb, if_usb_write_bulk_callback, cardp);
312
313	urb->transfer_flags \|= URB_ZERO_PACKET;
314
315	if (usb_submit_urb(urb, GFP_ATOMIC))
316	return -1;
317	return 0;
318	}
319
320	static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
321	void (callbackfn)(struct urb urb))
322	{
323	struct sk_buff *skb;
324
325	skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
326	if (!skb)
327	return -1;
328
329	cardp->rx_skb = skb;
330
331	/* Fill the receive configuration URB and initialise the Rx call back */
332	usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
333	usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
9b44fb89	334	skb_tail_pointer(skb),
c305a19a LCC	335	MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn, cardp);
	336
	337	cardp->rx_urb->transfer_flags \|= URB_ZERO_PACKET;
	338
	339	if (usb_submit_urb(cardp->rx_urb, GFP_ATOMIC)) {
	340	kfree_skb(skb);
	341	cardp->rx_skb = NULL;
	342	return -1;
	343	} else
	344	return 0;
	345	}
	346
	347	static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
	348	{
	349	return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
	350	}
	351
	352	static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
	353	{
	354	return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
	355	}
	356
	357	static void if_usb_receive_fwload(struct urb *urb)
	358	{
	359	struct if_usb_card *cardp = urb->context;
	360	struct sk_buff *skb = cardp->rx_skb;
	361	struct fwsyncheader *syncfwheader;
	362	struct bootcmdresp bcmdresp;
	363
	364	if (urb->status) {
	365	kfree_skb(skb);
	366	return;
	367	}
	368
	369	if (cardp->fwdnldover) {
	370	__le32 tmp = (__le32 )(skb->data);
	371
	372	if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
	373	tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY))
	374	/* Firmware ready event received */
	375	wake_up(&cardp->fw_wq);
	376	else
	377	if_usb_submit_rx_urb_fwload(cardp);
	378	kfree_skb(skb);
	379	return;
	380	}
	381	if (cardp->bootcmdresp <= 0) {
	382	memcpy(&bcmdresp, skb->data, sizeof(bcmdresp));
	383
	384	if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
	385	kfree_skb(skb);
	386	if_usb_submit_rx_urb_fwload(cardp);
	387	cardp->bootcmdresp = 1;
	388	/* Received valid boot command response */
	389	return;
	390	}
	391	if (bcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
	392	if (bcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) \|\|
	393	bcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) \|\|
	394	bcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION))
	395	cardp->bootcmdresp = -1;
	396	} else if (bcmdresp.cmd == BOOT_CMD_FW_BY_USB &&
	397	bcmdresp.result == BOOT_CMD_RESP_OK)
	398	cardp->bootcmdresp = 1;
399
400	kfree_skb(skb);
401	if_usb_submit_rx_urb_fwload(cardp);
402	return;
403	}
404
405	syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
406	if (!syncfwheader) {
407	kfree_skb(skb);
408	return;
409	}
410
411	memcpy(syncfwheader, skb->data, sizeof(struct fwsyncheader));
412
413	if (!syncfwheader->cmd)
414	cardp->CRC_OK = 1;
415	else
416	cardp->CRC_OK = 0;
417	kfree_skb(skb);
418
419	/* reschedule timer for 200ms hence */
420	mod_timer(&cardp->fw_timeout, jiffies + (HZ/5));
421
422	if (cardp->fwfinalblk) {
423	cardp->fwdnldover = 1;
424	goto exit;
425	}
426
427	if_usb_send_fw_pkt(cardp);
428
429	exit:
430	if_usb_submit_rx_urb_fwload(cardp);
431
432	kfree(syncfwheader);
433
434	return;
435	}
436
437	#define MRVDRV_MIN_PKT_LEN 30
438
439	static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
440	struct if_usb_card *cardp,
441	struct lbtf_private *priv)
442	{
443	if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
444	\|\| recvlength < MRVDRV_MIN_PKT_LEN) {
445	kfree_skb(skb);
446	return;
447	}
448
449	skb_put(skb, recvlength);
450	skb_pull(skb, MESSAGE_HEADER_LEN);
451	lbtf_rx(priv, skb);
452	}
453
454	static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
455	struct sk_buff *skb,
456	struct if_usb_card *cardp,
457	struct lbtf_private *priv)
458	{
459	if (recvlength > LBS_CMD_BUFFER_SIZE) {
460	kfree_skb(skb);
461	return;
462	}
463
0ee904c3	464	BUG_ON(!in_interrupt());
c305a19a LCC	465
	466	spin_lock(&priv->driver_lock);
	467	memcpy(priv->cmd_resp_buff, recvbuff + MESSAGE_HEADER_LEN,
	468	recvlength - MESSAGE_HEADER_LEN);
	469	kfree_skb(skb);
	470	lbtf_cmd_response_rx(priv);
	471	spin_unlock(&priv->driver_lock);
	472	}
	473
	474	/**
	475	* if_usb_receive - read data received from the device.
	476	*
	477	* @urb pointer to struct urb
	478	*/
	479	static void if_usb_receive(struct urb *urb)
	480	{
	481	struct if_usb_card *cardp = urb->context;
	482	struct sk_buff *skb = cardp->rx_skb;
	483	struct lbtf_private *priv = cardp->priv;
	484	int recvlength = urb->actual_length;
	485	uint8_t *recvbuff = NULL;
	486	uint32_t recvtype = 0;
	487	__le32 pkt = (__le32 ) skb->data;
	488
	489	if (recvlength) {
	490	if (urb->status) {
	491	kfree_skb(skb);
	492	goto setup_for_next;
	493	}
	494
	495	recvbuff = skb->data;
	496	recvtype = le32_to_cpu(pkt[0]);
	497	} else if (urb->status) {
	498	kfree_skb(skb);
	499	return;
	500	}
	501
	502	switch (recvtype) {
	503	case CMD_TYPE_DATA:
	504	process_cmdtypedata(recvlength, skb, cardp, priv);
	505	break;
	506
	507	case CMD_TYPE_REQUEST:
	508	process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
	509	break;
	510
	511	case CMD_TYPE_INDICATION:
	512	{
	513	/* Event cause handling */
	514	u32 event_cause = le32_to_cpu(pkt[1]);
	515
	516	/* Icky undocumented magic special case */
	517	if (event_cause & 0xffff0000) {
	518	u16 tmp;
	519	u8 retrycnt;
	520	u8 failure;
	521
	522	tmp = event_cause >> 16;
	523	retrycnt = tmp & 0x00ff;
	524	failure = (tmp & 0xff00) >> 8;
	525	lbtf_send_tx_feedback(priv, retrycnt, failure);
	526	} else if (event_cause == LBTF_EVENT_BCN_SENT)
	527	lbtf_bcn_sent(priv);
	528	else
529	printk(KERN_DEBUG
530	"Unsupported notification %d received\n",
531	event_cause);
532	kfree_skb(skb);
533	break;
534	}
535	default:
536	printk(KERN_DEBUG "libertastf: unknown command type 0x%X\n",
537	recvtype);
538	kfree_skb(skb);
539	break;
540	}
541
542	setup_for_next:
543	if_usb_submit_rx_urb(cardp);
544	}
545
546	/**
547	* if_usb_host_to_card - Download data to the device
548	*
549	* @priv pointer to struct lbtf_private structure
550	* @type type of data
551	* @buf pointer to data buffer
552	* @len number of bytes
553	*
554	* Returns: 0 on success, nonzero otherwise
555	*/
556	static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
557	uint8_t *payload, uint16_t nb)
558	{
559	struct if_usb_card *cardp = priv->card;
560	u8 data = 0;
561
562	if (type == MVMS_CMD) {
563	(__le32 )cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
564	} else {
565	(__le32 )cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
566	data = 1;
567	}
568
569	memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
570
571	return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN,
572	data);
573	}
574
575	/**
576	* if_usb_issue_boot_command - Issue boot command to Boot2.
577	*
578	* @ivalue 1 boots from FW by USB-Download, 2 boots from FW in EEPROM.
579	*
580	* Returns: 0
581	*/
582	static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
583	{
584	struct bootcmd *bootcmd = cardp->ep_out_buf;
585
586	/* Prepare command */
587	bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
588	bootcmd->cmd = ivalue;
589	memset(bootcmd->pad, 0, sizeof(bootcmd->pad));
590
591	/* Issue command */
592	usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd), 0);
593
594	return 0;
595	}
596
597
598	/**
599	* check_fwfile_format - Check the validity of Boot2/FW image.
600	*
601	* @data pointer to image
602	* @totlen image length
603	*
604	* Returns: 0 if the image is valid, nonzero otherwise.
605	*/
606	static int check_fwfile_format(const u8 *data, u32 totlen)
607	{
608	u32 bincmd, exit;
609	u32 blksize, offset, len;
610	int ret;
611
612	ret = 1;
613	exit = len = 0;
614
615	do {
616	struct fwheader fwh = (void ) data;
617
618	bincmd = le32_to_cpu(fwh->dnldcmd);
619	blksize = le32_to_cpu(fwh->datalength);
620	switch (bincmd) {
621	case FW_HAS_DATA_TO_RECV:
622	offset = sizeof(struct fwheader) + blksize;
623	data += offset;
624	len += offset;
625	if (len >= totlen)
626	exit = 1;
627	break;
628	case FW_HAS_LAST_BLOCK:
629	exit = 1;
630	ret = 0;
631	break;
632	default:
633	exit = 1;
634	break;
635	}
636	} while (!exit);
637
638	if (ret)
639	printk(KERN_INFO
640	"libertastf: firmware file format check failed\n");
641	return ret;
642	}
643
644
645	static int if_usb_prog_firmware(struct if_usb_card *cardp)
646	{
647	int i = 0;
648	static int reset_count = 10;
649	int ret = 0;
650
651	ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
652	if (ret < 0) {
653	printk(KERN_INFO "libertastf: firmware %s not found\n",
654	lbtf_fw_name);
655	goto done;
656	}
657
658	if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
659	goto release_fw;
660
661	restart:
662	if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
663	ret = -1;
664	goto release_fw;
665	}
666
667	cardp->bootcmdresp = 0;
668	do {
669	int j = 0;
670	i++;
671	/* Issue Boot command = 1, Boot from Download-FW */
672	if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
673	/* wait for command response */
674	do {
675	j++;
676	msleep_interruptible(100);
677	} while (cardp->bootcmdresp == 0 && j < 10);
678	} while (cardp->bootcmdresp == 0 && i < 5);
679
680	if (cardp->bootcmdresp <= 0) {
681	if (--reset_count >= 0) {
682	if_usb_reset_device(cardp);
683	goto restart;
684	}
685	return -1;
686	}
687
688	i = 0;
689
690	cardp->totalbytes = 0;
691	cardp->fwlastblksent = 0;
692	cardp->CRC_OK = 1;
693	cardp->fwdnldover = 0;
694	cardp->fwseqnum = -1;
695	cardp->totalbytes = 0;
696	cardp->fwfinalblk = 0;
697
698	/* Send the first firmware packet... */
699	if_usb_send_fw_pkt(cardp);
700
701	/* ... and wait for the process to complete */
702	wait_event_interruptible(cardp->fw_wq, cardp->priv->surpriseremoved \|\|
703	cardp->fwdnldover);
704
705	del_timer_sync(&cardp->fw_timeout);
706	usb_kill_urb(cardp->rx_urb);
707
708	if (!cardp->fwdnldover) {
709	printk(KERN_INFO "libertastf: failed to load fw,"
710	" resetting device!\n");
711	if (--reset_count >= 0) {
712	if_usb_reset_device(cardp);
713	goto restart;
714	}
715
716	printk(KERN_INFO "libertastf: fw download failure\n");
717	ret = -1;
718	goto release_fw;
719	}
720
721	cardp->priv->fw_ready = 1;
722
723	release_fw:
724	release_firmware(cardp->fw);
725	cardp->fw = NULL;
726
727	if_usb_setup_firmware(cardp->priv);
728
729	done:
730	return ret;
731	}
732	EXPORT_SYMBOL_GPL(if_usb_prog_firmware);
733
734
735	#define if_usb_suspend NULL
736	#define if_usb_resume NULL
737
738	static struct usb_driver if_usb_driver = {
739	.name = DRV_NAME,
740	.probe = if_usb_probe,
741	.disconnect = if_usb_disconnect,
742	.id_table = if_usb_table,
743	.suspend = if_usb_suspend,
744	.resume = if_usb_resume,
745	};
746
747	static int __init if_usb_init_module(void)
748	{
749	int ret = 0;
750
751	ret = usb_register(&if_usb_driver);
752	return ret;
753	}
754
755	static void __exit if_usb_exit_module(void)
756	{
757	usb_deregister(&if_usb_driver);
758	}
759
760	module_init(if_usb_init_module);
761	module_exit(if_usb_exit_module);
762
763	MODULE_DESCRIPTION("8388 USB WLAN Thinfirm Driver");
764	MODULE_AUTHOR("Cozybit Inc.");
765	MODULE_LICENSE("GPL");