usb.c 32.6 KB
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/*
 * Marvell Wireless LAN device driver: USB specific handling
 *
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Xinming Hu 已提交
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 * Copyright (C) 2012-2014, Marvell International Ltd.
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 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include "main.h"
#include "usb.h"

#define USB_VERSION	"1.0"

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static u8 user_rmmod;
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static struct mwifiex_if_ops usb_ops;
static struct semaphore add_remove_card_sem;

static struct usb_device_id mwifiex_usb_table[] = {
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	/* 8766 */
	{USB_DEVICE(USB8XXX_VID, USB8766_PID_1)},
	{USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8766_PID_2,
				       USB_CLASS_VENDOR_SPEC,
				       USB_SUBCLASS_VENDOR_SPEC, 0xff)},
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	/* 8797 */
	{USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
	{USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
				       USB_CLASS_VENDOR_SPEC,
				       USB_SUBCLASS_VENDOR_SPEC, 0xff)},
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	/* 8801 */
	{USB_DEVICE(USB8XXX_VID, USB8801_PID_1)},
	{USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8801_PID_2,
				       USB_CLASS_VENDOR_SPEC,
				       USB_SUBCLASS_VENDOR_SPEC, 0xff)},
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	/* 8997 */
	{USB_DEVICE(USB8XXX_VID, USB8997_PID_1)},
	{USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8997_PID_2,
				       USB_CLASS_VENDOR_SPEC,
				       USB_SUBCLASS_VENDOR_SPEC, 0xff)},
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	{ }	/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);

static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);

/* This function handles received packet. Necessary action is taken based on
 * cmd/event/data.
 */
static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
			    struct sk_buff *skb, u8 ep)
{
	u32 recv_type;
	__le32 tmp;
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	int ret;
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	if (adapter->hs_activated)
		mwifiex_process_hs_config(adapter);

	if (skb->len < INTF_HEADER_LEN) {
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		mwifiex_dbg(adapter, ERROR,
			    "%s: invalid skb->len\n", __func__);
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		return -1;
	}

	switch (ep) {
	case MWIFIEX_USB_EP_CMD_EVENT:
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		mwifiex_dbg(adapter, EVENT,
			    "%s: EP_CMD_EVENT\n", __func__);
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		skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
		recv_type = le32_to_cpu(tmp);
		skb_pull(skb, INTF_HEADER_LEN);

		switch (recv_type) {
		case MWIFIEX_USB_TYPE_CMD:
			if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
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				mwifiex_dbg(adapter, ERROR,
					    "CMD: skb->len too large\n");
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				ret = -1;
				goto exit_restore_skb;
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			} else if (!adapter->curr_cmd) {
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				mwifiex_dbg(adapter, WARN, "CMD: no curr_cmd\n");
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				if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
					mwifiex_process_sleep_confirm_resp(
							adapter, skb->data,
							skb->len);
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					ret = 0;
					goto exit_restore_skb;
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				}
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				ret = -1;
				goto exit_restore_skb;
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			}

			adapter->curr_cmd->resp_skb = skb;
			adapter->cmd_resp_received = true;
			break;
		case MWIFIEX_USB_TYPE_EVENT:
			if (skb->len < sizeof(u32)) {
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				mwifiex_dbg(adapter, ERROR,
					    "EVENT: skb->len too small\n");
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				ret = -1;
				goto exit_restore_skb;
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			}
			skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
			adapter->event_cause = le32_to_cpu(tmp);
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			mwifiex_dbg(adapter, EVENT,
				    "event_cause %#x\n", adapter->event_cause);
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			if (skb->len > MAX_EVENT_SIZE) {
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				mwifiex_dbg(adapter, ERROR,
					    "EVENT: event body too large\n");
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				ret = -1;
				goto exit_restore_skb;
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			}

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			memcpy(adapter->event_body, skb->data +
			       MWIFIEX_EVENT_HEADER_LEN, skb->len);

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			adapter->event_received = true;
			adapter->event_skb = skb;
			break;
		default:
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			mwifiex_dbg(adapter, ERROR,
				    "unknown recv_type %#x\n", recv_type);
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			return -1;
		}
		break;
	case MWIFIEX_USB_EP_DATA:
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		mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
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		if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
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			mwifiex_dbg(adapter, ERROR,
				    "DATA: skb->len too large\n");
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			return -1;
		}
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		skb_queue_tail(&adapter->rx_data_q, skb);
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		adapter->data_received = true;
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		atomic_inc(&adapter->rx_pending);
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		break;
	default:
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		mwifiex_dbg(adapter, ERROR,
			    "%s: unknown endport %#x\n", __func__, ep);
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		return -1;
	}

	return -EINPROGRESS;
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exit_restore_skb:
	/* The buffer will be reused for further cmds/events */
	skb_push(skb, INTF_HEADER_LEN);

	return ret;
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}

static void mwifiex_usb_rx_complete(struct urb *urb)
{
	struct urb_context *context = (struct urb_context *)urb->context;
	struct mwifiex_adapter *adapter = context->adapter;
	struct sk_buff *skb = context->skb;
	struct usb_card_rec *card;
	int recv_length = urb->actual_length;
	int size, status;

	if (!adapter || !adapter->card) {
		pr_err("mwifiex adapter or card structure is not valid\n");
		return;
	}

	card = (struct usb_card_rec *)adapter->card;
	if (card->rx_cmd_ep == context->ep)
		atomic_dec(&card->rx_cmd_urb_pending);
	else
		atomic_dec(&card->rx_data_urb_pending);

	if (recv_length) {
		if (urb->status || (adapter->surprise_removed)) {
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			mwifiex_dbg(adapter, ERROR,
				    "URB status is failed: %d\n", urb->status);
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			/* Do not free skb in case of command ep */
			if (card->rx_cmd_ep != context->ep)
				dev_kfree_skb_any(skb);
			goto setup_for_next;
		}
		if (skb->len > recv_length)
			skb_trim(skb, recv_length);
		else
			skb_put(skb, recv_length - skb->len);

		status = mwifiex_usb_recv(adapter, skb, context->ep);

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		mwifiex_dbg(adapter, INFO,
			    "info: recv_length=%d, status=%d\n",
			    recv_length, status);
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		if (status == -EINPROGRESS) {
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			mwifiex_queue_main_work(adapter);
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			/* urb for data_ep is re-submitted now;
			 * urb for cmd_ep will be re-submitted in callback
			 * mwifiex_usb_recv_complete
			 */
			if (card->rx_cmd_ep == context->ep)
				return;
		} else {
			if (status == -1)
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				mwifiex_dbg(adapter, ERROR,
					    "received data processing failed!\n");
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			/* Do not free skb in case of command ep */
			if (card->rx_cmd_ep != context->ep)
				dev_kfree_skb_any(skb);
		}
	} else if (urb->status) {
		if (!adapter->is_suspended) {
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			mwifiex_dbg(adapter, FATAL,
				    "Card is removed: %d\n", urb->status);
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			adapter->surprise_removed = true;
		}
		dev_kfree_skb_any(skb);
		return;
	} else {
		/* Do not free skb in case of command ep */
		if (card->rx_cmd_ep != context->ep)
			dev_kfree_skb_any(skb);

		/* fall through setup_for_next */
	}

setup_for_next:
	if (card->rx_cmd_ep == context->ep)
		size = MWIFIEX_RX_CMD_BUF_SIZE;
	else
		size = MWIFIEX_RX_DATA_BUF_SIZE;

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	if (card->rx_cmd_ep == context->ep) {
		mwifiex_usb_submit_rx_urb(context, size);
	} else {
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		if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING) {
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			mwifiex_usb_submit_rx_urb(context, size);
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		} else {
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			context->skb = NULL;
		}
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	}
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	return;
}

static void mwifiex_usb_tx_complete(struct urb *urb)
{
	struct urb_context *context = (struct urb_context *)(urb->context);
	struct mwifiex_adapter *adapter = context->adapter;
	struct usb_card_rec *card = adapter->card;
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	struct usb_tx_data_port *port;
	int i;
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	mwifiex_dbg(adapter, INFO,
		    "%s: status: %d\n", __func__, urb->status);
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	if (context->ep == card->tx_cmd_ep) {
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		mwifiex_dbg(adapter, CMD,
			    "%s: CMD\n", __func__);
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		atomic_dec(&card->tx_cmd_urb_pending);
		adapter->cmd_sent = false;
	} else {
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		mwifiex_dbg(adapter, DATA,
			    "%s: DATA\n", __func__);
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		mwifiex_write_data_complete(adapter, context->skb, 0,
					    urb->status ? -1 : 0);
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		for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
			port = &card->port[i];
			if (context->ep == port->tx_data_ep) {
				atomic_dec(&port->tx_data_urb_pending);
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				port->block_status = false;
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				break;
			}
		}
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		adapter->data_sent = false;
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	}

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	if (card->mc_resync_flag)
		mwifiex_multi_chan_resync(adapter);

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	mwifiex_queue_main_work(adapter);
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	return;
}

static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
{
	struct mwifiex_adapter *adapter = ctx->adapter;
	struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;

	if (card->rx_cmd_ep != ctx->ep) {
		ctx->skb = dev_alloc_skb(size);
		if (!ctx->skb) {
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			mwifiex_dbg(adapter, ERROR,
				    "%s: dev_alloc_skb failed\n", __func__);
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			return -ENOMEM;
		}
	}

	usb_fill_bulk_urb(ctx->urb, card->udev,
			  usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
			  size, mwifiex_usb_rx_complete, (void *)ctx);

	if (card->rx_cmd_ep == ctx->ep)
		atomic_inc(&card->rx_cmd_urb_pending);
	else
		atomic_inc(&card->rx_data_urb_pending);

	if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
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		mwifiex_dbg(adapter, ERROR, "usb_submit_urb failed\n");
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		dev_kfree_skb_any(ctx->skb);
		ctx->skb = NULL;

		if (card->rx_cmd_ep == ctx->ep)
			atomic_dec(&card->rx_cmd_urb_pending);
		else
			atomic_dec(&card->rx_data_urb_pending);

		return -1;
	}

	return 0;
}

static void mwifiex_usb_free(struct usb_card_rec *card)
{
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	struct usb_tx_data_port *port;
	int i, j;
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	if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
		usb_kill_urb(card->rx_cmd.urb);

	usb_free_urb(card->rx_cmd.urb);
	card->rx_cmd.urb = NULL;

	if (atomic_read(&card->rx_data_urb_pending))
		for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
			if (card->rx_data_list[i].urb)
				usb_kill_urb(card->rx_data_list[i].urb);

	for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
		usb_free_urb(card->rx_data_list[i].urb);
		card->rx_data_list[i].urb = NULL;
	}

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	for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
		port = &card->port[i];
		for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
			usb_free_urb(port->tx_data_list[j].urb);
			port->tx_data_list[j].urb = NULL;
		}
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	}

	usb_free_urb(card->tx_cmd.urb);
	card->tx_cmd.urb = NULL;

	return;
}

/* This function probes an mwifiex device and registers it. It allocates
 * the card structure, initiates the device registration and initialization
 * procedure by adding a logical interface.
 */
static int mwifiex_usb_probe(struct usb_interface *intf,
			     const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct usb_host_interface *iface_desc = intf->cur_altsetting;
	struct usb_endpoint_descriptor *epd;
	int ret, i;
	struct usb_card_rec *card;
	u16 id_vendor, id_product, bcd_device, bcd_usb;

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	card = devm_kzalloc(&intf->dev, sizeof(*card), GFP_KERNEL);
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	if (!card)
		return -ENOMEM;

	id_vendor = le16_to_cpu(udev->descriptor.idVendor);
	id_product = le16_to_cpu(udev->descriptor.idProduct);
	bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
	bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
	pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
		 id_vendor, id_product, bcd_device);

	/* PID_1 is used for firmware downloading only */
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	switch (id_product) {
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	case USB8766_PID_1:
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	case USB8797_PID_1:
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	case USB8801_PID_1:
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	case USB8997_PID_1:
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		card->usb_boot_state = USB8XXX_FW_DNLD;
		break;
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	case USB8766_PID_2:
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	case USB8797_PID_2:
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	case USB8801_PID_2:
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	case USB8997_PID_2:
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		card->usb_boot_state = USB8XXX_FW_READY;
		break;
	default:
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		pr_warn("unknown id_product %#x\n", id_product);
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		card->usb_boot_state = USB8XXX_FW_DNLD;
		break;
	}
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	card->udev = udev;
	card->intf = intf;

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	pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
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		 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
		 udev->descriptor.bDeviceSubClass,
		 udev->descriptor.bDeviceProtocol);

	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		epd = &iface_desc->endpoint[i].desc;
		if (usb_endpoint_dir_in(epd) &&
		    usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
		    usb_endpoint_xfer_bulk(epd)) {
			pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
				 le16_to_cpu(epd->wMaxPacketSize),
				 epd->bEndpointAddress);
			card->rx_cmd_ep = usb_endpoint_num(epd);
			atomic_set(&card->rx_cmd_urb_pending, 0);
		}
		if (usb_endpoint_dir_in(epd) &&
		    usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
		    usb_endpoint_xfer_bulk(epd)) {
			pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
				 le16_to_cpu(epd->wMaxPacketSize),
				 epd->bEndpointAddress);
			card->rx_data_ep = usb_endpoint_num(epd);
			atomic_set(&card->rx_data_urb_pending, 0);
		}
		if (usb_endpoint_dir_out(epd) &&
		    usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
		    usb_endpoint_xfer_bulk(epd)) {
			pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
				 le16_to_cpu(epd->wMaxPacketSize),
				 epd->bEndpointAddress);
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			card->port[0].tx_data_ep = usb_endpoint_num(epd);
			atomic_set(&card->port[0].tx_data_urb_pending, 0);
		}
		if (usb_endpoint_dir_out(epd) &&
		    usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA_CH2 &&
		    usb_endpoint_xfer_bulk(epd)) {
			pr_debug("info: bulk OUT chan2:\t"
				 "max pkt size: %d, addr: %d\n",
				 le16_to_cpu(epd->wMaxPacketSize),
				 epd->bEndpointAddress);
			card->port[1].tx_data_ep = usb_endpoint_num(epd);
			atomic_set(&card->port[1].tx_data_urb_pending, 0);
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		}
		if (usb_endpoint_dir_out(epd) &&
		    usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
		    usb_endpoint_xfer_bulk(epd)) {
			pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
				 le16_to_cpu(epd->wMaxPacketSize),
				 epd->bEndpointAddress);
			card->tx_cmd_ep = usb_endpoint_num(epd);
			atomic_set(&card->tx_cmd_urb_pending, 0);
			card->bulk_out_maxpktsize =
					le16_to_cpu(epd->wMaxPacketSize);
		}
	}

	usb_set_intfdata(intf, card);

	ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
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			       MWIFIEX_USB, &card->udev->dev);
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	if (ret) {
		pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
		usb_reset_device(udev);
		return ret;
	}

	usb_get_dev(udev);

	return 0;
}

/* Kernel needs to suspend all functions separately. Therefore all
 * registered functions must have drivers with suspend and resume
 * methods. Failing that the kernel simply removes the whole card.
 *
 * If already not suspended, this function allocates and sends a
 * 'host sleep activate' request to the firmware and turns off the traffic.
 */
static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct usb_card_rec *card = usb_get_intfdata(intf);
	struct mwifiex_adapter *adapter;
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	struct usb_tx_data_port *port;
	int i, j;
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	if (!card || !card->adapter) {
		pr_err("%s: card or card->adapter is NULL\n", __func__);
		return 0;
	}
	adapter = card->adapter;

	if (unlikely(adapter->is_suspended))
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		mwifiex_dbg(adapter, WARN,
			    "Device already suspended\n");
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	mwifiex_enable_hs(adapter);

	/* 'is_suspended' flag indicates device is suspended.
	 * It must be set here before the usb_kill_urb() calls. Reason
	 * is in the complete handlers, urb->status(= -ENOENT) and
	 * this flag is used in combination to distinguish between a
	 * 'suspended' state and a 'disconnect' one.
	 */
	adapter->is_suspended = true;
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	adapter->hs_enabling = false;
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	if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
		usb_kill_urb(card->rx_cmd.urb);

	if (atomic_read(&card->rx_data_urb_pending))
		for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
			if (card->rx_data_list[i].urb)
				usb_kill_urb(card->rx_data_list[i].urb);

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	for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
		port = &card->port[i];
		for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
			if (port->tx_data_list[j].urb)
				usb_kill_urb(port->tx_data_list[j].urb);
		}
	}
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	if (card->tx_cmd.urb)
		usb_kill_urb(card->tx_cmd.urb);

	return 0;
}

/* Kernel needs to suspend all functions separately. Therefore all
 * registered functions must have drivers with suspend and resume
 * methods. Failing that the kernel simply removes the whole card.
 *
 * If already not resumed, this function turns on the traffic and
 * sends a 'host sleep cancel' request to the firmware.
 */
static int mwifiex_usb_resume(struct usb_interface *intf)
{
	struct usb_card_rec *card = usb_get_intfdata(intf);
	struct mwifiex_adapter *adapter;
	int i;

	if (!card || !card->adapter) {
		pr_err("%s: card or card->adapter is NULL\n", __func__);
		return 0;
	}
	adapter = card->adapter;

	if (unlikely(!adapter->is_suspended)) {
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		mwifiex_dbg(adapter, WARN,
			    "Device already resumed\n");
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		return 0;
	}

	/* Indicate device resumed. The netdev queue will be resumed only
	 * after the urbs have been re-submitted
	 */
	adapter->is_suspended = false;

	if (!atomic_read(&card->rx_data_urb_pending))
		for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
			mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
						  MWIFIEX_RX_DATA_BUF_SIZE);

	if (!atomic_read(&card->rx_cmd_urb_pending)) {
		card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
		if (card->rx_cmd.skb)
			mwifiex_usb_submit_rx_urb(&card->rx_cmd,
						  MWIFIEX_RX_CMD_BUF_SIZE);
	}

	/* Disable Host Sleep */
	if (adapter->hs_activated)
		mwifiex_cancel_hs(mwifiex_get_priv(adapter,
						   MWIFIEX_BSS_ROLE_ANY),
				  MWIFIEX_ASYNC_CMD);

	return 0;
}

static void mwifiex_usb_disconnect(struct usb_interface *intf)
{
	struct usb_card_rec *card = usb_get_intfdata(intf);
602
	struct mwifiex_adapter *adapter;
603

604 605
	if (!card || !card->adapter) {
		pr_err("%s: card or card->adapter is NULL\n", __func__);
606 607 608
		return;
	}

609 610 611
	adapter = card->adapter;
	if (!adapter->priv_num)
		return;
612

613
	if (user_rmmod && !adapter->mfg_mode) {
614 615 616 617 618 619
#ifdef CONFIG_PM
		if (adapter->is_suspended)
			mwifiex_usb_resume(intf);
#endif

		mwifiex_deauthenticate_all(adapter);
620

621 622 623
		mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
							  MWIFIEX_BSS_ROLE_ANY),
					 MWIFIEX_FUNC_SHUTDOWN);
624
	}
625

626 627
	mwifiex_usb_free(card);

628 629
	mwifiex_dbg(adapter, FATAL,
		    "%s: removing card\n", __func__);
630 631
	mwifiex_remove_card(adapter, &add_remove_card_sem);

632 633 634 635
	usb_put_dev(interface_to_usbdev(intf));
}

static struct usb_driver mwifiex_usb_driver = {
636
	.name = "mwifiex_usb",
637 638 639 640 641
	.probe = mwifiex_usb_probe,
	.disconnect = mwifiex_usb_disconnect,
	.id_table = mwifiex_usb_table,
	.suspend = mwifiex_usb_suspend,
	.resume = mwifiex_usb_resume,
642
	.soft_unbind = 1,
643 644 645 646 647
};

static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
{
	struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
648 649
	struct usb_tx_data_port *port;
	int i, j;
650 651 652 653 654

	card->tx_cmd.adapter = adapter;
	card->tx_cmd.ep = card->tx_cmd_ep;

	card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
655
	if (!card->tx_cmd.urb)
656 657
		return -ENOMEM;

658 659 660 661 662
	for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
		port = &card->port[i];
		if (!port->tx_data_ep)
			continue;
		port->tx_data_ix = 0;
663 664 665 666
		if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
			port->block_status = false;
		else
			port->block_status = true;
667 668 669 670 671
		for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
			port->tx_data_list[j].adapter = adapter;
			port->tx_data_list[j].ep = port->tx_data_ep;
			port->tx_data_list[j].urb =
					usb_alloc_urb(0, GFP_KERNEL);
672
			if (!port->tx_data_list[j].urb)
673
				return -ENOMEM;
674 675 676 677 678 679 680 681 682 683 684 685 686 687 688
		}
	}

	return 0;
}

static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
{
	struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
	int i;

	card->rx_cmd.adapter = adapter;
	card->rx_cmd.ep = card->rx_cmd_ep;

	card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
689
	if (!card->rx_cmd.urb)
690 691 692
		return -ENOMEM;

	card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
693
	if (!card->rx_cmd.skb)
694 695 696 697 698 699 700 701 702 703
		return -ENOMEM;

	if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
		return -1;

	for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
		card->rx_data_list[i].adapter = adapter;
		card->rx_data_list[i].ep = card->rx_data_ep;

		card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
704
		if (!card->rx_data_list[i].urb)
705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726
			return -1;
		if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
					      MWIFIEX_RX_DATA_BUF_SIZE))
			return -1;
	}

	return 0;
}

static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
				   u32 *len, u8 ep, u32 timeout)
{
	struct usb_card_rec *card = adapter->card;
	int actual_length, ret;

	if (!(*len % card->bulk_out_maxpktsize))
		(*len)++;

	/* Send the data block */
	ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
			   *len, &actual_length, timeout);
	if (ret) {
727 728
		mwifiex_dbg(adapter, ERROR,
			    "usb_bulk_msg for tx failed: %d\n", ret);
729
		return ret;
730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746
	}

	*len = actual_length;

	return ret;
}

static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
				  u32 *len, u8 ep, u32 timeout)
{
	struct usb_card_rec *card = adapter->card;
	int actual_length, ret;

	/* Receive the data response */
	ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
			   *len, &actual_length, timeout);
	if (ret) {
747 748
		mwifiex_dbg(adapter, ERROR,
			    "usb_bulk_msg for rx failed: %d\n", ret);
749
		return ret;
750 751 752 753 754 755 756
	}

	*len = actual_length;

	return ret;
}

757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803
static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
{
	struct usb_card_rec *card = adapter->card;
	u8 active_port = MWIFIEX_USB_EP_DATA;
	struct mwifiex_private *priv = NULL;
	int i;

	if (adapter->usb_mc_status) {
		for (i = 0; i < adapter->priv_num; i++) {
			priv = adapter->priv[i];
			if (!priv)
				continue;
			if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
			     !priv->bss_started) ||
			    (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
			     !priv->media_connected))
				priv->usb_port = MWIFIEX_USB_EP_DATA;
		}
		for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
			card->port[i].block_status = false;
	} else {
		for (i = 0; i < adapter->priv_num; i++) {
			priv = adapter->priv[i];
			if (!priv)
				continue;
			if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
			     priv->bss_started) ||
			    (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
			     priv->media_connected)) {
				active_port = priv->usb_port;
				break;
			}
		}
		for (i = 0; i < adapter->priv_num; i++) {
			priv = adapter->priv[i];
			if (priv)
				priv->usb_port = active_port;
		}
		for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
			if (active_port == card->port[i].tx_data_ep)
				card->port[i].block_status = false;
			else
				card->port[i].block_status = true;
		}
	}
}

804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828
static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
{
	struct usb_card_rec *card = priv->adapter->card;
	int idx;

	for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
		if (priv->usb_port == card->port[idx].tx_data_ep)
			return !card->port[idx].block_status;
	}

	return false;
}

static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
{
	struct usb_card_rec *card = adapter->card;
	int i;

	for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
		if (!card->port[i].block_status)
			return false;

	return true;
}

829 830 831 832 833 834
/* This function write a command/data packet to card. */
static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
				    struct sk_buff *skb,
				    struct mwifiex_tx_param *tx_param)
{
	struct usb_card_rec *card = adapter->card;
835 836
	struct urb_context *context = NULL;
	struct usb_tx_data_port *port = NULL;
837 838
	u8 *data = (u8 *)skb->data;
	struct urb *tx_urb;
839
	int idx, ret = -EINPROGRESS;
840 841

	if (adapter->is_suspended) {
842 843
		mwifiex_dbg(adapter, ERROR,
			    "%s: not allowed while suspended\n", __func__);
844 845 846 847
		return -1;
	}

	if (adapter->surprise_removed) {
848
		mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
849 850 851
		return -1;
	}

852
	mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
853 854 855 856

	if (ep == card->tx_cmd_ep) {
		context = &card->tx_cmd;
	} else {
857 858 859 860 861
		for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
			if (ep == card->port[idx].tx_data_ep) {
				port = &card->port[idx];
				if (atomic_read(&port->tx_data_urb_pending)
				    >= MWIFIEX_TX_DATA_URB) {
862
					port->block_status = true;
863 864 865
					adapter->data_sent =
						mwifiex_usb_data_sent(adapter);
					return -EBUSY;
866 867 868 869 870 871 872 873 874 875 876 877
				}
				if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
					port->tx_data_ix = 0;
				context =
					&port->tx_data_list[port->tx_data_ix++];
				break;
			}
		}
		if (!port) {
			mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
			return -1;
		}
878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893
	}

	context->adapter = adapter;
	context->ep = ep;
	context->skb = skb;
	tx_urb = context->urb;

	usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
			  data, skb->len, mwifiex_usb_tx_complete,
			  (void *)context);

	tx_urb->transfer_flags |= URB_ZERO_PACKET;

	if (ep == card->tx_cmd_ep)
		atomic_inc(&card->tx_cmd_urb_pending);
	else
894
		atomic_inc(&port->tx_data_urb_pending);
895

896 897 898 899 900
	if (ep != card->tx_cmd_ep &&
	    atomic_read(&port->tx_data_urb_pending) ==
					MWIFIEX_TX_DATA_URB) {
		port->block_status = true;
		adapter->data_sent = mwifiex_usb_data_sent(adapter);
901
		ret = -ENOSR;
902 903
	}

904
	if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
905 906
		mwifiex_dbg(adapter, ERROR,
			    "%s: usb_submit_urb failed\n", __func__);
907 908 909
		if (ep == card->tx_cmd_ep) {
			atomic_dec(&card->tx_cmd_urb_pending);
		} else {
910
			atomic_dec(&port->tx_data_urb_pending);
911
			port->block_status = false;
912
			adapter->data_sent = false;
913 914
			if (port->tx_data_ix)
				port->tx_data_ix--;
915
			else
916
				port->tx_data_ix = MWIFIEX_TX_DATA_URB;
917
		}
918
		ret = -1;
919 920
	}

921
	return ret;
922 923 924 925 926 927 928 929 930
}

/* This function register usb device and initialize parameter. */
static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
{
	struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;

	card->adapter = adapter;

931
	switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
932 933 934 935 936 937
	case USB8997_PID_1:
	case USB8997_PID_2:
		adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
		strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
		adapter->ext_scan = true;
		break;
K
Kristian Evensen 已提交
938 939 940 941
	case USB8766_PID_1:
	case USB8766_PID_2:
		adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
		strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
942
		adapter->ext_scan = true;
K
Kristian Evensen 已提交
943
		break;
944 945 946 947
	case USB8801_PID_1:
	case USB8801_PID_2:
		adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
		strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
948
		adapter->ext_scan = false;
949
		break;
950 951 952
	case USB8797_PID_1:
	case USB8797_PID_2:
	default:
953
		adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
954 955 956 957
		strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
		break;
	}

958
	adapter->usb_mc_status = false;
959
	adapter->usb_mc_setup = false;
960

961 962 963
	return 0;
}

964 965 966 967
static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
{
	struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;

968
	card->adapter = NULL;
969 970
}

971 972 973 974 975
static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
				    struct mwifiex_fw_image *fw)
{
	int ret = 0;
	u8 *firmware = fw->fw_buf, *recv_buff;
976 977
	u32 retries = USB8XXX_FW_MAX_RETRY + 1;
	u32 dlen;
978 979 980 981 982 983
	u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
	struct fw_data *fwdata;
	struct fw_sync_header sync_fw;
	u8 check_winner = 1;

	if (!firmware) {
984 985
		mwifiex_dbg(adapter, ERROR,
			    "No firmware image found! Terminating download\n");
986 987 988 989 990 991
		ret = -1;
		goto fw_exit;
	}

	/* Allocate memory for transmit */
	fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
992 993
	if (!fwdata) {
		ret = -ENOMEM;
994
		goto fw_exit;
995
	}
996 997 998

	/* Allocate memory for receive */
	recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
999 1000
	if (!recv_buff) {
		ret = -ENOMEM;
1001
		goto cleanup;
1002
	}
1003 1004 1005 1006 1007 1008 1009 1010

	do {
		/* Send pseudo data to check winner status first */
		if (check_winner) {
			memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
			dlen = 0;
		} else {
			/* copy the header of the fw_data to get the length */
1011 1012
			memcpy(&fwdata->fw_hdr, &firmware[tlen],
			       sizeof(struct fw_header));
1013 1014 1015 1016 1017

			dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
			dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
			tlen += sizeof(struct fw_header);

1018 1019 1020 1021
			/* Command 7 doesn't have data length field */
			if (dnld_cmd == FW_CMD_7)
				dlen = 0;

1022
			memcpy(fwdata->data, &firmware[tlen], dlen);
1023 1024 1025 1026 1027 1028

			fwdata->seq_num = cpu_to_le32(fw_seqnum);
			tlen += dlen;
		}

		/* If the send/receive fails or CRC occurs then retry */
1029
		while (--retries) {
1030 1031 1032 1033 1034 1035 1036 1037
			u8 *buf = (u8 *)fwdata;
			u32 len = FW_DATA_XMIT_SIZE;

			/* send the firmware block */
			ret = mwifiex_write_data_sync(adapter, buf, &len,
						MWIFIEX_USB_EP_CMD_EVENT,
						MWIFIEX_USB_TIMEOUT);
			if (ret) {
1038 1039 1040
				mwifiex_dbg(adapter, ERROR,
					    "write_data_sync: failed: %d\n",
					    ret);
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
				continue;
			}

			buf = recv_buff;
			len = FW_DNLD_RX_BUF_SIZE;

			/* Receive the firmware block response */
			ret = mwifiex_read_data_sync(adapter, buf, &len,
						MWIFIEX_USB_EP_CMD_EVENT,
						MWIFIEX_USB_TIMEOUT);
			if (ret) {
1052 1053 1054
				mwifiex_dbg(adapter, ERROR,
					    "read_data_sync: failed: %d\n",
					    ret);
1055 1056 1057 1058 1059 1060 1061 1062 1063
				continue;
			}

			memcpy(&sync_fw, recv_buff,
			       sizeof(struct fw_sync_header));

			/* check 1st firmware block resp for highest bit set */
			if (check_winner) {
				if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1064 1065 1066
					mwifiex_dbg(adapter, WARN,
						    "USB is not the winner %#x\n",
						    sync_fw.cmd);
1067 1068 1069 1070 1071 1072

					/* returning success */
					ret = 0;
					goto cleanup;
				}

1073 1074
				mwifiex_dbg(adapter, MSG,
					    "start to download FW...\n");
1075 1076 1077 1078 1079 1080 1081

				check_winner = 0;
				break;
			}

			/* check the firmware block response for CRC errors */
			if (sync_fw.cmd) {
1082 1083 1084
				mwifiex_dbg(adapter, ERROR,
					    "FW received block with CRC %#x\n",
					    sync_fw.cmd);
1085 1086 1087 1088
				ret = -1;
				continue;
			}

1089
			retries = USB8XXX_FW_MAX_RETRY + 1;
1090 1091 1092 1093 1094 1095
			break;
		}
		fw_seqnum++;
	} while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);

cleanup:
1096 1097
	mwifiex_dbg(adapter, MSG,
		    "info: FW download over, size %d bytes\n", tlen);
1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113

	kfree(recv_buff);
	kfree(fwdata);

	if (retries)
		ret = 0;
fw_exit:
	return ret;
}

static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
			struct mwifiex_fw_image *fw)
{
	int ret;
	struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;

1114
	if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1115 1116 1117 1118 1119
		ret = mwifiex_prog_fw_w_helper(adapter, fw);
		if (ret)
			return -1;

		/* Boot state changes after successful firmware download */
1120
		if (card->usb_boot_state == USB8XXX_FW_DNLD)
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156
			return -1;
	}

	ret = mwifiex_usb_rx_init(adapter);
	if (!ret)
		ret = mwifiex_usb_tx_init(adapter);

	return ret;
}

static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
{
	struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;

	skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
	if ((ep == card->rx_cmd_ep) &&
	    (!atomic_read(&card->rx_cmd_urb_pending)))
		mwifiex_usb_submit_rx_urb(&card->rx_cmd,
					  MWIFIEX_RX_CMD_BUF_SIZE);

	return;
}

static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
				       struct sk_buff *skb)
{
	mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);

	return 0;
}

/* This function wakes up the card. */
static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
{
	/* Simulation of HS_AWAKE event */
	adapter->pm_wakeup_fw_try = false;
1157
	del_timer(&adapter->wakeup_timer);
1158 1159 1160 1161 1162 1163
	adapter->pm_wakeup_card_req = false;
	adapter->ps_state = PS_STATE_AWAKE;

	return 0;
}

1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
{
	struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
	int i;
	struct urb_context *ctx;

	for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
		if (card->rx_data_list[i].skb)
			continue;
		ctx = &card->rx_data_list[i];
		mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
	}
}

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/* This function is called after the card has woken up. */
static inline int
mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
{
	return 0;
}

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static struct mwifiex_if_ops usb_ops = {
	.register_dev =		mwifiex_register_dev,
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	.unregister_dev =	mwifiex_unregister_dev,
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	.wakeup =		mwifiex_pm_wakeup_card,
	.wakeup_complete =	mwifiex_pm_wakeup_card_complete,

	/* USB specific */
	.dnld_fw =		mwifiex_usb_dnld_fw,
	.cmdrsp_complete =	mwifiex_usb_cmd_event_complete,
	.event_complete =	mwifiex_usb_cmd_event_complete,
	.host_to_card =		mwifiex_usb_host_to_card,
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	.submit_rem_rx_urbs =	mwifiex_usb_submit_rem_rx_urbs,
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	.multi_port_resync =	mwifiex_usb_port_resync,
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	.is_port_ready =	mwifiex_usb_is_port_ready,
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};

/* This function initializes the USB driver module.
 *
 * This initiates the semaphore and registers the device with
 * USB bus.
 */
static int mwifiex_usb_init_module(void)
{
	int ret;

	pr_debug("Marvell USB8797 Driver\n");

	sema_init(&add_remove_card_sem, 1);

	ret = usb_register(&mwifiex_usb_driver);
	if (ret)
		pr_err("Driver register failed!\n");
	else
		pr_debug("info: Driver registered successfully!\n");

	return ret;
}

/* This function cleans up the USB driver.
 *
 * The following major steps are followed in .disconnect for cleanup:
 *      - Resume the device if its suspended
 *      - Disconnect the device if connected
 *      - Shutdown the firmware
 *      - Unregister the device from USB bus.
 */
static void mwifiex_usb_cleanup_module(void)
{
	if (!down_interruptible(&add_remove_card_sem))
		up(&add_remove_card_sem);

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	/* set the flag as user is removing this module */
	user_rmmod = 1;
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	usb_deregister(&mwifiex_usb_driver);
}

module_init(mwifiex_usb_init_module);
module_exit(mwifiex_usb_cleanup_module);

MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
MODULE_VERSION(USB_VERSION);
MODULE_LICENSE("GPL v2");
K
Kristian Evensen 已提交
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MODULE_FIRMWARE(USB8766_DEFAULT_FW_NAME);
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MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
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MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
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MODULE_FIRMWARE(USB8997_DEFAULT_FW_NAME);