path: root/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.
 */
#define DRV_NAME "lbtf_usb"

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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

#include <linux/delay.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/usb.h>

#define INSANEDEBUG	0
#define lbtf_deb_usb2(...) do { if (INSANEDEBUG) lbtf_deb_usbd(__VA_ARGS__); } while (0)

#define MESSAGE_HEADER_LEN	4

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

MODULE_FIRMWARE("lbtf_usb.bin");

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) {
		/* print the failure status number for debug */
		pr_info("URB in failure status: %d\n", urb->status);
	} else {
		lbtf_deb_usb2(&urb->dev->dev, "URB status is successful\n");
		lbtf_deb_usb2(&urb->dev->dev, "Actual length transmitted %d\n",
			     urb->actual_length);
	}
}

/**
 *  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)
{
	lbtf_deb_enter(LBTF_DEB_USB);

	/* 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;

	lbtf_deb_leave(LBTF_DEB_USB);
}

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;

	lbtf_deb_enter(LBTF_DEB_USB);

	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))
		lbtf_deb_usb("Setting boot2 version failed\n");

	lbtf_deb_leave(LBTF_DEB_USB);
}

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

	lbtf_deb_enter(LBTF_DEB_USB);
	if (!cardp->fwdnldover) {
		/* Download timed out */
		cardp->priv->surpriseremoved = 1;
		pr_err("Download timed out\n");
	} else {
		lbtf_deb_usb("Download complete, no event. Assuming success\n");
	}
	wake_up(&cardp->fw_wq);
	lbtf_deb_leave(LBTF_DEB_USB);
}

/**
 *  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;

	lbtf_deb_enter(LBTF_DEB_USB);
	udev = interface_to_usbdev(intf);

	cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
	if (!cardp) {
		pr_err("Out of memory allocating private data.\n");
		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;

	lbtf_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
		     " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
		     le16_to_cpu(udev->descriptor.bcdUSB),
		     udev->descriptor.