Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 999 insertions, 0 deletions

diff --git a/drivers/net/wireless/marvell/libertas/if_usb.c b/drivers/net/wireless/marvell/libertas/if_usb.c
new file mode 100644
index 000000000..2240b4db8
--- /dev/null
+++ b/drivers/net/wireless/marvell/libertas/if_usb.c
@@ -0,0 +1,999 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This file contains functions used in USB interface module.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/firmware.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/olpc-ec.h>
+
+#ifdef CONFIG_OLPC
+#include <asm/olpc.h>
+#endif
+
+#define DRV_NAME "usb8xxx"
+
+#include "host.h"
+#include "decl.h"
+#include "defs.h"
+#include "dev.h"
+#include "cmd.h"
+#include "if_usb.h"
+
+#define INSANEDEBUG	0
+#define lbs_deb_usb2(...) do { if (INSANEDEBUG) lbs_deb_usbd(__VA_ARGS__); } while (0)
+
+#define MESSAGE_HEADER_LEN	4
+
+MODULE_FIRMWARE("libertas/usb8388_v9.bin");
+MODULE_FIRMWARE("libertas/usb8388_v5.bin");
+MODULE_FIRMWARE("libertas/usb8388.bin");
+MODULE_FIRMWARE("libertas/usb8682.bin");
+MODULE_FIRMWARE("usb8388.bin");
+
+enum {
+	MODEL_UNKNOWN = 0x0,
+	MODEL_8388 = 0x1,
+	MODEL_8682 = 0x2
+};
+
+/* table of firmware file names */
+static const struct lbs_fw_table fw_table[] = {
+	{ MODEL_8388, "libertas/usb8388_olpc.bin", NULL },
+	{ MODEL_8388, "libertas/usb8388_v9.bin", NULL },
+	{ MODEL_8388, "libertas/usb8388_v5.bin", NULL },
+	{ MODEL_8388, "libertas/usb8388.bin", NULL },
+	{ MODEL_8388, "usb8388.bin", NULL },
+	{ MODEL_8682, "libertas/usb8682.bin", NULL },
+	{ 0, NULL, NULL }
+};
+
+static const struct usb_device_id if_usb_table[] = {
+	/* Enter the device signature inside */
+	{ USB_DEVICE(0x1286, 0x2001), .driver_info = MODEL_8388 },
+	{ USB_DEVICE(0x05a3, 0x8388), .driver_info = MODEL_8388 },
+	{}	/* 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 void if_usb_prog_firmware(struct lbs_private *priv, int ret,
+				 const struct firmware *fw,
+				 const struct firmware *unused);
+static int if_usb_host_to_card(struct lbs_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);
+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_write_bulk_callback - callback function to handle the status
+ * of the URB
+ * @urb:	pointer to &urb structure
+ * returns:	N/A
+ */
+static void if_usb_write_bulk_callback(struct urb *urb)
+{
+	struct if_usb_card *cardp = (struct if_usb_card *) urb->context;
+
+	/* handle the transmission complete validations */
+
+	if (urb->status == 0) {
+		struct lbs_private *priv = cardp->priv;
+
+		lbs_deb_usb2(&urb->dev->dev, "URB status is successful\n");
+		lbs_deb_usb2(&urb->dev->dev, "Actual length transmitted %d\n",
+			     urb->actual_length);
+
+		/* Boot commands such as UPDATE_FW and UPDATE_BOOT2 are not
+		 * passed up to the lbs level.
+		 */
+		if (priv && priv->dnld_sent != DNLD_BOOTCMD_SENT)
+			lbs_host_to_card_done(priv);
+	} else {
+		/* print the failure status number for debug */
+		pr_info("URB in failure status: %d\n", urb->status);
+	}
+}
+
+/**
+ * if_usb_free - free tx/rx urb, skb and rx buffer
+ * @cardp:	pointer to &if_usb_card
+ * returns:	N/A
+ */
+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_free_urb(cardp->tx_urb);
+	cardp->tx_urb = NULL;
+
+	usb_free_urb(cardp->rx_urb);
+	cardp->rx_urb = NULL;
+
+	kfree(cardp->ep_out_buf);
+	cardp->ep_out_buf = NULL;
+}
+
+static void if_usb_setup_firmware(struct lbs_private *priv)
+{
+	struct if_usb_card *cardp = priv->card;
+	struct cmd_ds_set_boot2_ver b2_cmd;
+	struct cmd_ds_802_11_fw_wake_method wake_method;
+
+	b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
+	b2_cmd.action = 0;
+	b2_cmd.version = cardp->boot2_version;
+
+	if (lbs_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
+		lbs_deb_usb("Setting boot2 version failed\n");
+
+	priv->wol_gpio = 2; /* Wake via GPIO2... */
+	priv->wol_gap = 20; /* ... after 20ms    */
+	lbs_host_sleep_cfg(priv, EHS_WAKE_ON_UNICAST_DATA,
+			(struct wol_config *) NULL);
+
+	wake_method.hdr.size = cpu_to_le16(sizeof(wake_method));
+	wake_method.action = cpu_to_le16(CMD_ACT_GET);
+	if (lbs_cmd_with_response(priv, CMD_802_11_FW_WAKE_METHOD, &wake_method)) {
+		netdev_info(priv->dev, "Firmware does not seem to support PS mode\n");
+		priv->fwcapinfo &= ~FW_CAPINFO_PS;
+	} else {
+		if (le16_to_cpu(wake_method.method) == CMD_WAKE_METHOD_COMMAND_INT) {
+			lbs_deb_usb("Firmware seems to support PS with wake-via-command\n");
+		} else {
+			/* The versions which boot up this way don't seem to
+			   work even if we set it to the command interrupt */
+			priv->fwcapinfo &= ~FW_CAPINFO_PS;
+			netdev_info(priv->dev,
+				    "Firmware doesn't wake via command interrupt; disabling PS mode\n");
+		}
+	}
+}
+
+static void if_usb_fw_timeo(struct timer_list *t)
+{
+	struct if_usb_card *cardp = from_timer(cardp, t, fw_timeout);
+
+	if (cardp->fwdnldover) {
+		lbs_deb_usb("Download complete, no event. Assuming success\n");
+	} else {
+		pr_err("Download timed out\n");
+		cardp->surprise_removed = 1;
+	}
+	wake_up(&cardp->fw_wq);
+}
+
+#ifdef CONFIG_OLPC
+static void if_usb_reset_olpc_card(struct lbs_private *priv)
+{
+	printk(KERN_CRIT "Resetting OLPC wireless via EC...\n");
+	olpc_ec_cmd(0x25, NULL, 0, NULL, 0);
+}
+#endif
+
+/**
+ * if_usb_probe - sets the configuration values
+ * @intf:	&usb_interface pointer
+ * @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 lbs_private *priv;
+	struct if_usb_card *cardp;
+	int r = -ENOMEM;
+	int i;
+
+	udev = interface_to_usbdev(intf);
+
+	cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
+	if (!cardp)
+		goto error;
+
+	timer_setup(&cardp->fw_timeout, if_usb_fw_timeo, 0);
+	init_waitqueue_head(&cardp->fw_wq);
+
+	cardp->udev = udev;
+	cardp->model = (uint32_t) id->driver_info;
+	iface_desc = intf->cur_altsetting;
+
+	lbs_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.bDeviceClass,
+		     udev->descriptor.bDeviceSubClass,
+		     udev->descriptor.bDeviceProtocol);
+
+	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);
+
+			lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n", cardp->ep_in);
+			lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n", cardp->ep_in_size);
+
+		} else if (usb_endpoint_is_bulk_out(endpoint)) {
+			cardp->ep_out_size = le16_to_cpu(endpoint->wMaxPacketSize);
+			cardp->ep_out = usb_endpoint_num(endpoint);
+
+			lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n", cardp->ep_out);
+			lbs_deb_usbd(&udev->dev, "Bulk out size is %d\n", cardp->ep_out_size);
+		}
+	}
+	if (!cardp->ep_out_size || !cardp->ep_in_size) {
+		lbs_deb_usbd(&udev->dev, "Endpoints not found\n");
+		goto dealloc;
+	}
+	if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
+		lbs_deb_usbd(&udev->dev, "Rx URB allocation failed\n");
+		goto dealloc;
+	}
+	if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
+		lbs_deb_usbd(&udev->dev, "Tx URB allocation failed\n");
+		goto dealloc;
+	}
+	cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE, GFP_KERNEL);
+	if (!cardp->ep_out_buf) {
+		lbs_deb_usbd(&udev->dev, "Could not allocate buffer\n");
+		goto dealloc;
+	}
+
+	priv = lbs_add_card(cardp, &intf->dev);
+	if (IS_ERR(priv)) {
+		r = PTR_ERR(priv);
+		goto err_add_card;
+	}
+
+	cardp->priv = priv;
+
+	priv->hw_host_to_card = if_usb_host_to_card;
+	priv->enter_deep_sleep = NULL;
+	priv->exit_deep_sleep = NULL;
+	priv->reset_deep_sleep_wakeup = NULL;
+	priv->is_polling = false;
+#ifdef CONFIG_OLPC
+	if (machine_is_olpc())
+		priv->reset_card = if_usb_reset_olpc_card;
+#endif
+
+	cardp->boot2_version = udev->descriptor.bcdDevice;
+
+	usb_get_dev(udev);
+	usb_set_intfdata(intf, cardp);
+
+	r = lbs_get_firmware_async(priv, &udev->dev, cardp->model,
+				   fw_table, if_usb_prog_firmware);
+	if (r)
+		goto err_get_fw;
+
+	return 0;
+
+err_get_fw:
+	usb_put_dev(udev);
+	lbs_remove_card(priv);
+err_add_card:
+	if_usb_reset_device(cardp);
+dealloc:
+	if_usb_free(cardp);
+	kfree(cardp);
+
+error:
+	return r;
+}
+
+/**
+ * if_usb_disconnect - free resource and cleanup
+ * @intf:	USB interface structure
+ * returns:	N/A
+ */
+static void if_usb_disconnect(struct usb_interface *intf)
+{
+	struct if_usb_card *cardp = usb_get_intfdata(intf);
+	struct lbs_private *priv = cardp->priv;
+
+	cardp->surprise_removed = 1;
+
+	if (priv) {
+		lbs_stop_card(priv);
+		lbs_remove_card(priv);
+	}
+
+	/* Unlink and free urb */
+	if_usb_free(cardp);
+	kfree(cardp);
+
+	usb_set_intfdata(intf, NULL);
+	usb_put_dev(interface_to_usbdev(intf));
+}
+
+/**
+ * if_usb_send_fw_pkt - download FW
+ * @cardp:	pointer to &struct if_usb_card
+ * returns:	0
+ */
+static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
+{
+	struct fwdata *fwdata = cardp->ep_out_buf;
+	const uint8_t *firmware = 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--;
+	}
+
+	lbs_deb_usb2(&cardp->udev->dev, "totalbytes = %d\n",
+		     cardp->totalbytes);
+
+	/* 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));
+
+	lbs_deb_usb2(&cardp->udev->dev, "Data length = %d\n",
+		     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));
+
+	if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
+		lbs_deb_usb2(&cardp->udev->dev, "There are data to follow\n");
+		lbs_deb_usb2(&cardp->udev->dev, "seqnum = %d totalbytes = %d\n",
+			     cardp->fwseqnum, cardp->totalbytes);
+	} else if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
+		lbs_deb_usb2(&cardp->udev->dev, "Host has finished FW downloading\n");
+		lbs_deb_usb2(&cardp->udev->dev, "Downloading FW JUMP BLOCK\n");
+
+		cardp->fwfinalblk = 1;
+	}
+
+	lbs_deb_usb2(&cardp->udev->dev, "Firmware download done; size %d\n",
+		     cardp->totalbytes);
+
+	return 0;
+}
+
+static int if_usb_reset_device(struct if_usb_card *cardp)
+{
+	struct cmd_header *cmd = cardp->ep_out_buf + 4;
+	int ret;
+
+	*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
+
+	cmd->command = cpu_to_le16(CMD_802_11_RESET);
+	cmd->size = cpu_to_le16(sizeof(cmd));
+	cmd->result = cpu_to_le16(0);
+	cmd->seqnum = cpu_to_le16(0x5a5a);
+	usb_tx_block(cardp, cardp->ep_out_buf, 4 + sizeof(struct cmd_header));
+
+	msleep(100);
+	ret = usb_reset_device(cardp->udev);
+	msleep(100);
+
+#ifdef CONFIG_OLPC
+	if (ret && machine_is_olpc())
+		if_usb_reset_olpc_card(NULL);
+#endif
+
+	return ret;
+}
+
+/**
+ *  usb_tx_block - transfer the data to the device
+ *  @cardp: 	pointer to &struct if_usb_card
+ *  @payload:	pointer to payload data
+ *  @nb:	data length
+ *  returns:	0 for success or negative error code
+ */
+static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload, uint16_t nb)
+{
+	int ret;
+
+	/* check if device is removed */
+	if (cardp->surprise_removed) {
+		lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
+		ret = -ENODEV;
+		goto tx_ret;
+	}
+
+	usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
+			  usb_sndbulkpipe(cardp->udev,
+					  cardp->ep_out),
+			  payload, nb, if_usb_write_bulk_callback, cardp);
+
+	cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
+
+	if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
+		lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed: %d\n", ret);
+	} else {
+		lbs_deb_usb2(&cardp->udev->dev, "usb_submit_urb success\n");
+		ret = 0;
+	}
+
+tx_ret:
+	return ret;
+}
+
+static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
+				  void (*callbackfn)(struct urb *urb))
+{
+	struct sk_buff *skb;
+	int ret = -1;
+
+	if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
+		pr_err("No free skb\n");
+		goto rx_ret;
+	}
+
+	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->data + IPFIELD_ALIGN_OFFSET,
+			  MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
+			  cardp);
+
+	lbs_deb_usb2(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb);
+	if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
+		lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed: %d\n", ret);
+		kfree_skb(skb);
+		cardp->rx_skb = NULL;
+		ret = -1;
+	} else {
+		lbs_deb_usb2(&cardp->udev->dev, "Submit Rx URB success\n");
+		ret = 0;
+	}
+
+rx_ret:
+	return ret;
+}
+
+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 bootcmdresp;
+
+	if (urb->status) {
+		lbs_deb_usbd(&cardp->udev->dev,
+			     "URB status is failed during fw load\n");
+		kfree_skb(skb);
+		return;
+	}
+
+	if (cardp->fwdnldover) {
+		__le32 *tmp = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
+
+		if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
+		    tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY)) {
+			pr_info("Firmware ready event received\n");
+			wake_up(&cardp->fw_wq);
+		} else {
+			lbs_deb_usb("Waiting for confirmation; got %x %x\n",
+				    le32_to_cpu(tmp[0]), le32_to_cpu(tmp[1]));
+			if_usb_submit_rx_urb_fwload(cardp);
+		}
+		kfree_skb(skb);
+		return;
+	}
+	if (cardp->bootcmdresp <= 0) {
+		memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
+			sizeof(bootcmdresp));
+
+		if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
+			kfree_skb(skb);
+			if_usb_submit_rx_urb_fwload(cardp);
+			cardp->bootcmdresp = BOOT_CMD_RESP_OK;
+			lbs_deb_usbd(&cardp->udev->dev,
+				     "Received valid boot command response\n");
+			return;
+		}
+		if (bootcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
+			if (bootcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
+			    bootcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
+			    bootcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION)) {
+				if (!cardp->bootcmdresp)
+					pr_info("Firmware already seems alive; resetting\n");
+				cardp->bootcmdresp = -1;
+			} else {
+				pr_info("boot cmd response wrong magic number (0x%x)\n",
+					    le32_to_cpu(bootcmdresp.magic));
+			}
+		} else if ((bootcmdresp.cmd != BOOT_CMD_FW_BY_USB) &&
+			   (bootcmdresp.cmd != BOOT_CMD_UPDATE_FW) &&
+			   (bootcmdresp.cmd != BOOT_CMD_UPDATE_BOOT2)) {
+			pr_info("boot cmd response cmd_tag error (%d)\n",
+				bootcmdresp.cmd);
+		} else if (bootcmdresp.result != BOOT_CMD_RESP_OK) {
+			pr_info("boot cmd response result error (%d)\n",
+				bootcmdresp.result);
+		} else {
+			cardp->bootcmdresp = 1;
+			lbs_deb_usbd(&cardp->udev->dev,
+				     "Received valid boot command response\n");
+		}
+		kfree_skb(skb);
+		if_usb_submit_rx_urb_fwload(cardp);
+		return;
+	}
+
+	syncfwheader = kmemdup(skb->data + IPFIELD_ALIGN_OFFSET,
+			       sizeof(struct fwsyncheader), GFP_ATOMIC);
+	if (!syncfwheader) {
+		lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
+		kfree_skb(skb);
+		return;
+	}
+
+	if (!syncfwheader->cmd) {
+		lbs_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
+		lbs_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n",
+			     le32_to_cpu(syncfwheader->seqnum));
+		cardp->CRC_OK = 1;
+	} else {
+		lbs_deb_usbd(&cardp->udev->dev, "FW received Blk with CRC error\n");
+		cardp->CRC_OK = 0;
+	}
+
+	kfree_skb(skb);
+
+	/* Give device 5s to either write firmware to its RAM or eeprom */
+	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);
+}
+
+#define MRVDRV_MIN_PKT_LEN	30
+
+static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
+				       struct if_usb_card *cardp,
+				       struct lbs_private *priv)
+{
+	if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
+	    || recvlength < MRVDRV_MIN_PKT_LEN) {
+		lbs_deb_usbd(&cardp->udev->dev, "Packet length is Invalid\n");
+		kfree_skb(skb);
+		return;
+	}
+
+	skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
+	skb_put(skb, recvlength);
+	skb_pull(skb, MESSAGE_HEADER_LEN);
+
+	lbs_process_rxed_packet(priv, skb);
+}
+
+static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
+				      struct sk_buff *skb,
+				      struct if_usb_card *cardp,
+				      struct lbs_private *priv)
+{
+	unsigned long flags;
+	u8 i;
+
+	if (recvlength > LBS_CMD_BUFFER_SIZE) {
+		lbs_deb_usbd(&cardp->udev->dev,
+			     "The receive buffer is too large\n");
+		kfree_skb(skb);
+		return;
+	}
+
+	spin_lock_irqsave(&priv->driver_lock, flags);
+
+	i = (priv->resp_idx == 0) ? 1 : 0;
+	BUG_ON(priv->resp_len[i]);
+	priv->resp_len[i] = (recvlength - MESSAGE_HEADER_LEN);
+	memcpy(priv->resp_buf[i], recvbuff + MESSAGE_HEADER_LEN,
+		priv->resp_len[i]);
+	dev_kfree_skb_irq(skb);
+	lbs_notify_command_response(priv, i);
+
+	spin_unlock_irqrestore(&priv->driver_lock, flags);
+
+	lbs_deb_usbd(&cardp->udev->dev,
+		    "Wake up main thread to handle cmd response\n");
+}
+
+/**
+ *  if_usb_receive - read the packet into the upload buffer,
+ *  wake up the main thread and initialise the Rx callack
+ *
+ *  @urb:	pointer to &struct urb
+ *  returns:	N/A
+ */
+static void if_usb_receive(struct urb *urb)
+{
+	struct if_usb_card *cardp = urb->context;
+	struct sk_buff *skb = cardp->rx_skb;
+	struct lbs_private *priv = cardp->priv;
+	int recvlength = urb->actual_length;
+	uint8_t *recvbuff = NULL;
+	uint32_t recvtype = 0;
+	__le32 *pkt = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
+	uint32_t event;
+
+	if (recvlength) {
+		if (urb->status) {
+			lbs_deb_usbd(&cardp->udev->dev, "RX URB failed: %d\n",
+				     urb->status);
+			kfree_skb(skb);
+			goto setup_for_next;
+		}
+
+		recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
+		recvtype = le32_to_cpu(pkt[0]);
+		lbs_deb_usbd(&cardp->udev->dev,
+			    "Recv length = 0x%x, Recv type = 0x%X\n",
+			    recvlength, recvtype);
+	} 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 handling */
+		event = le32_to_cpu(pkt[1]);
+		lbs_deb_usbd(&cardp->udev->dev, "**EVENT** 0x%X\n", event);
+		kfree_skb(skb);
+
+		/* Icky undocumented magic special case */
+		if (event & 0xffff0000) {
+			u32 trycount = (event & 0xffff0000) >> 16;
+
+			lbs_send_tx_feedback(priv, trycount);
+		} else
+			lbs_queue_event(priv, event & 0xFF);
+		break;
+
+	default:
+		lbs_deb_usbd(&cardp->udev->dev, "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 - downloads data to FW
+ *  @priv:	pointer to &struct lbs_private structure
+ *  @type:	type of data
+ *  @payload:	pointer to data buffer
+ *  @nb:	number of bytes
+ *  returns:	0 for success or negative error code
+ */
+static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
+			       uint8_t *payload, uint16_t nb)
+{
+	struct if_usb_card *cardp = priv->card;
+
+	lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
+	lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
+
+	if (type == MVMS_CMD) {
+		*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
+		priv->dnld_sent = DNLD_CMD_SENT;
+	} else {
+		*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
+		priv->dnld_sent = DNLD_DATA_SENT;
+	}
+
+	memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
+
+	return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN);
+}
+
+/**
+ *  if_usb_issue_boot_command - issues Boot command to the Boot2 code
+ *  @cardp:	pointer to &if_usb_card
+ *  @ivalue:	1:Boot from FW by USB-Download
+ *		2:Boot from FW in EEPROM
+ *  returns:	0 for success or negative error code
+ */
+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));
+
+	return 0;
+}
+
+
+/**
+ *  check_fwfile_format - check the validity of Boot2/FW image
+ *
+ *  @data:	pointer to image
+ *  @totlen:	image length
+ *  returns:     0 (good) or 1 (failure)
+ */
+static int check_fwfile_format(const uint8_t *data, uint32_t totlen)
+{
+	uint32_t bincmd, exit;
+	uint32_t 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)
+		pr_err("firmware file format check FAIL\n");
+	else
+		lbs_deb_fw("firmware file format check PASS\n");
+
+	return ret;
+}
+
+static void if_usb_prog_firmware(struct lbs_private *priv, int ret,
+				 const struct firmware *fw,
+				 const struct firmware *unused)
+{
+	struct if_usb_card *cardp = priv->card;
+	int i = 0;
+	static int reset_count = 10;
+
+	if (ret) {
+		pr_err("failed to find firmware (%d)\n", ret);
+		goto done;
+	}
+
+	cardp->fw = fw;
+	if (check_fwfile_format(cardp->fw->data, cardp->fw->size)) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	/* Cancel any pending usb business */
+	usb_kill_urb(cardp->rx_urb);
+	usb_kill_urb(cardp->tx_urb);
+
+	cardp->fwlastblksent = 0;
+	cardp->fwdnldover = 0;
+	cardp->totalbytes = 0;
+	cardp->fwfinalblk = 0;
+	cardp->bootcmdresp = 0;
+
+restart:
+	if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
+		lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
+		ret = -EIO;
+		goto done;
+	}
+
+	cardp->bootcmdresp = 0;
+	do {
+		int j = 0;
+		i++;
+		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 == BOOT_CMD_RESP_NOT_SUPPORTED) {
+		/* Return to normal operation */
+		ret = -EOPNOTSUPP;
+		usb_kill_urb(cardp->rx_urb);
+		usb_kill_urb(cardp->tx_urb);
+		if (if_usb_submit_rx_urb(cardp) < 0)
+			ret = -EIO;
+		goto done;
+	} else if (cardp->bootcmdresp <= 0) {
+		if (--reset_count >= 0) {
+			if_usb_reset_device(cardp);
+			goto restart;
+		}
+		ret = -EIO;
+		goto done;
+	}
+
+	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->surprise_removed || cardp->fwdnldover);
+
+	del_timer_sync(&cardp->fw_timeout);
+	usb_kill_urb(cardp->rx_urb);
+
+	if (!cardp->fwdnldover) {
+		pr_info("failed to load fw, resetting device!\n");
+		if (--reset_count >= 0) {
+			if_usb_reset_device(cardp);
+			goto restart;
+		}
+
+		pr_info("FW download failure, time = %d ms\n", i * 100);
+		ret = -EIO;
+		goto done;
+	}
+
+	cardp->priv->fw_ready = 1;
+	if_usb_submit_rx_urb(cardp);
+
+	if (lbs_start_card(priv))
+		goto done;
+
+	if_usb_setup_firmware(priv);
+
+	/*
+	 * EHS_REMOVE_WAKEUP is not supported on all versions of the firmware.
+	 */
+	priv->wol_criteria = EHS_REMOVE_WAKEUP;
+	if (lbs_host_sleep_cfg(priv, priv->wol_criteria, NULL))
+		priv->ehs_remove_supported = false;
+
+ done:
+	cardp->fw = NULL;
+}
+
+
+#ifdef CONFIG_PM
+static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct if_usb_card *cardp = usb_get_intfdata(intf);
+	struct lbs_private *priv = cardp->priv;
+	int ret;
+
+	if (priv->psstate != PS_STATE_FULL_POWER) {
+		ret = -1;
+		goto out;
+	}
+
+#ifdef CONFIG_OLPC
+	if (machine_is_olpc()) {
+		if (priv->wol_criteria == EHS_REMOVE_WAKEUP)
+			olpc_ec_wakeup_clear(EC_SCI_SRC_WLAN);
+		else
+			olpc_ec_wakeup_set(EC_SCI_SRC_WLAN);
+	}
+#endif
+
+	ret = lbs_suspend(priv);
+	if (ret)
+		goto out;
+
+	/* Unlink tx & rx urb */
+	usb_kill_urb(cardp->tx_urb);
+	usb_kill_urb(cardp->rx_urb);
+
+ out:
+	return ret;
+}
+
+static int if_usb_resume(struct usb_interface *intf)
+{
+	struct if_usb_card *cardp = usb_get_intfdata(intf);
+	struct lbs_private *priv = cardp->priv;
+
+	if_usb_submit_rx_urb(cardp);
+
+	lbs_resume(priv);
+
+	return 0;
+}
+#else
+#define if_usb_suspend NULL
+#define if_usb_resume NULL
+#endif
+
+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,
+	.reset_resume = if_usb_resume,
+	.disable_hub_initiated_lpm = 1,
+};
+
+module_usb_driver(if_usb_driver);
+
+MODULE_DESCRIPTION("8388 USB WLAN Driver");
+MODULE_AUTHOR("Marvell International Ltd. and Red Hat, Inc.");
+MODULE_LICENSE("GPL");