if_usb.c

linux内核源码

				    "Received valid boot command response\n");
		}
		kfree_skb(skb);
		if_usb_submit_rx_urb_fwload(cardp);
		return;
	}

	syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
	if (!syncfwheader) {
		lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
		kfree_skb(skb);
		return;
	}

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

	if (!syncfwheader->cmd) {
		/*
		lbs_deb_usbd(&cardp->udev->dev,
			    "FW received Blk with correct CRC\n");
		lbs_deb_usbd(&cardp->udev->dev,
			    "FW received Blk seqnum = %d\n",
		       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);

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

	if_prog_firmware(cardp);

	if_usb_submit_rx_urb_fwload(cardp);
exit:
	kfree(syncfwheader);

	return;

}

#define MRVDRV_MIN_PKT_LEN	30

static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
				       struct usb_card_rec *cardp,
				       wlan_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);
	libertas_process_rxed_packet(priv, skb);
	priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
}

static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
				      struct sk_buff *skb,
				      struct usb_card_rec *cardp,
				      wlan_private *priv)
{
	u8 *cmdbuf;
	if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
		lbs_deb_usbd(&cardp->udev->dev,
			    "The receive buffer is too large\n");
		kfree_skb(skb);
		return;
	}

	if (!in_interrupt())
		BUG();

	spin_lock(&priv->adapter->driver_lock);
	/* take care of cur_cmd = NULL case by reading the
	 * data to clear the interrupt */
	if (!priv->adapter->cur_cmd) {
		cmdbuf = priv->upld_buf;
		priv->adapter->hisregcpy &= ~MRVDRV_CMD_UPLD_RDY;
	} else
		cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;

	cardp->usb_int_cause |= MRVDRV_CMD_UPLD_RDY;
	priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
	memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
	       priv->upld_len);

	kfree_skb(skb);
	libertas_interrupt(priv->dev);
	spin_unlock(&priv->adapter->driver_lock);

	lbs_deb_usbd(&cardp->udev->dev,
		    "Wake up main thread to handle cmd response\n");

	return;
}

/**
 *  @brief This function reads of the packet into the upload buff,
 *  wake up the main thread and initialise the Rx callack.
 *
 *  @param urb		pointer to struct urb
 *  @return 	   	N/A
 */
static void if_usb_receive(struct urb *urb)
{
	struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
	struct sk_buff *skb = rinfo->skb;
	struct usb_card_rec *cardp = (struct usb_card_rec *) rinfo->cardp;
	wlan_private * priv = cardp->priv;

	int recvlength = urb->actual_length;
	u8 *recvbuff = NULL;
	u32 recvtype = 0;

	lbs_deb_enter(LBS_DEB_USB);

	if (recvlength) {
		__le32 tmp;

		if (urb->status) {
			lbs_deb_usbd(&cardp->udev->dev,
				    "URB status is failed\n");
			kfree_skb(skb);
			goto setup_for_next;
		}

		recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
		memcpy(&tmp, recvbuff, sizeof(u32));
		recvtype = le32_to_cpu(tmp);
		lbs_deb_usbd(&cardp->udev->dev,
			    "Recv length = 0x%x, Recv type = 0x%X\n",
			    recvlength, recvtype);
	} else if (urb->status)
		goto rx_exit;

	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 */
		spin_lock(&priv->adapter->driver_lock);
		cardp->usb_event_cause = le32_to_cpu(*(__le32 *) (recvbuff + MESSAGE_HEADER_LEN));
		lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
			    cardp->usb_event_cause);
		if (cardp->usb_event_cause & 0xffff0000) {
			libertas_send_tx_feedback(priv);
			spin_unlock(&priv->adapter->driver_lock);
			break;
		}
		cardp->usb_event_cause <<= 3;
		cardp->usb_int_cause |= MRVDRV_CARDEVENT;
		kfree_skb(skb);
		libertas_interrupt(priv->dev);
		spin_unlock(&priv->adapter->driver_lock);
		goto rx_exit;
	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);
rx_exit:
	lbs_deb_leave(LBS_DEB_USB);
}

/**
 *  @brief This function downloads data to FW
 *  @param priv		pointer to wlan_private structure
 *  @param type		type of data
 *  @param buf		pointer to data buffer
 *  @param len		number of bytes
 *  @return 	   	0 or -1
 */
static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
{
	struct usb_card_rec *cardp = (struct usb_card_rec *)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 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
		priv->dnld_sent = DNLD_CMD_SENT;
		memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
		       MESSAGE_HEADER_LEN);

	} else {
		__le32 tmp = cpu_to_le32(CMD_TYPE_DATA);
		priv->dnld_sent = DNLD_DATA_SENT;
		memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
		       MESSAGE_HEADER_LEN);
	}

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

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

/* called with adapter->driver_lock held */
static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
{
	struct usb_card_rec *cardp = priv->card;

	*ireg = cardp->usb_int_cause;
	cardp->usb_int_cause = 0;

	lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);

	return 0;
}

static int if_usb_read_event_cause(wlan_private * priv)
{
	struct usb_card_rec *cardp = priv->card;

	priv->adapter->eventcause = cardp->usb_event_cause;
	/* Re-submit rx urb here to avoid event lost issue */
	if_usb_submit_rx_urb(cardp);
	return 0;
}

/**
 *  @brief This function issues Boot command to the Boot2 code
 *  @param ivalue   1:Boot from FW by USB-Download
 *                  2:Boot from FW in EEPROM
 *  @return 	   	0
 */
static int if_usb_issue_boot_command(struct usb_card_rec *cardp, int ivalue)
{
	struct bootcmdstr sbootcmd;
	int i;

	/* Prepare command */
	sbootcmd.u32magicnumber = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
	sbootcmd.u8cmd_tag = ivalue;
	for (i=0; i<11; i++)
		sbootcmd.au8dumy[i]=0x00;
	memcpy(cardp->bulk_out_buffer, &sbootcmd, sizeof(struct bootcmdstr));

	/* Issue command */
	usb_tx_block(cardp, cardp->bulk_out_buffer, sizeof(struct bootcmdstr));

	return 0;
}


/**
 *  @brief This function checks the validity of Boot2/FW image.
 *
 *  @param data              pointer to image
 *         len               image length
 *  @return     0 or -1
 */
static int check_fwfile_format(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)
		lbs_pr_err("firmware file format check FAIL\n");
	else
		lbs_deb_fw("firmware file format check PASS\n");

	return ret;
}


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

	lbs_deb_enter(LBS_DEB_USB);

	if ((ret = request_firmware(&cardp->fw, libertas_fw_name,
				    &cardp->udev->dev)) < 0) {
		lbs_pr_err("request_firmware() failed with %#x\n", ret);
		lbs_pr_err("firmware %s not found\n", libertas_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) {
		lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
		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;

	if_prog_firmware(cardp);

	do {
		lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
		i++;
		msleep_interruptible(100);
		if (cardp->surprise_removed || i >= 20)
			break;
	} while (!cardp->fwdnldover);

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

		lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
		ret = -1;
		goto release_fw;
	}

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

done:
	lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
	return ret;
}


#ifdef CONFIG_PM
static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct usb_card_rec *cardp = usb_get_intfdata(intf);
	wlan_private *priv = cardp->priv;

	lbs_deb_enter(LBS_DEB_USB);

	if (priv->adapter->psstate != PS_STATE_FULL_POWER)
		return -1;

	if (priv->mesh_dev && !priv->mesh_autostart_enabled) {
		/* Mesh autostart must be activated while sleeping
		 * On resume it will go back to the current state
		 */
		struct cmd_ds_mesh_access mesh_access;
		memset(&mesh_access, 0, sizeof(mesh_access));
		mesh_access.data[0] = cpu_to_le32(1);
		libertas_prepare_and_send_command(priv,
				CMD_MESH_ACCESS,
				CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
				CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
	}

	netif_device_detach(cardp->eth_dev);
	netif_device_detach(priv->mesh_dev);

	/* Unlink tx & rx urb */
	usb_kill_urb(cardp->tx_urb);
	usb_kill_urb(cardp->rx_urb);

	cardp->rx_urb_recall = 1;

	lbs_deb_leave(LBS_DEB_USB);
	return 0;
}

static int if_usb_resume(struct usb_interface *intf)
{
	struct usb_card_rec *cardp = usb_get_intfdata(intf);
	wlan_private *priv = cardp->priv;

	lbs_deb_enter(LBS_DEB_USB);

	cardp->rx_urb_recall = 0;

	if_usb_submit_rx_urb(cardp->priv);

	netif_device_attach(cardp->eth_dev);
	netif_device_attach(priv->mesh_dev);

	if (priv->mesh_dev && !priv->mesh_autostart_enabled) {
		/* Mesh autostart was activated while sleeping
		 * Disable it if appropriate
		 */
		struct cmd_ds_mesh_access mesh_access;
		memset(&mesh_access, 0, sizeof(mesh_access));
		mesh_access.data[0] = cpu_to_le32(0);
		libertas_prepare_and_send_command(priv,
				CMD_MESH_ACCESS,
				CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
				CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
	}

	lbs_deb_leave(LBS_DEB_USB);
	return 0;
}
#else
#define if_usb_suspend NULL
#define if_usb_resume NULL
#endif

static struct usb_driver if_usb_driver = {
	/* driver name */
	.name = usbdriver_name,
	/* probe function name */
	.probe = if_usb_probe,
	/* disconnect function  name */
	.disconnect = if_usb_disconnect,
	/* device signature table */
	.id_table = if_usb_table,
	.suspend = if_usb_suspend,
	.resume = if_usb_resume,
};

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

	lbs_deb_enter(LBS_DEB_MAIN);

	if (libertas_fw_name == NULL) {
		libertas_fw_name = default_fw_name;
	}

	ret = usb_register(&if_usb_driver);

	lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
	return ret;
}

static void if_usb_exit_module(void)
{
	struct usb_card_rec *cardp, *cardp_temp;

	lbs_deb_enter(LBS_DEB_MAIN);

	list_for_each_entry_safe(cardp, cardp_temp, &usb_devices, list) {
		libertas_prepare_and_send_command(cardp->priv, CMD_802_11_RESET,
		                                  CMD_ACT_HALT, 0, 0, NULL);
	}

	/* API unregisters the driver from USB subsystem */
	usb_deregister(&if_usb_driver);

	lbs_deb_leave(LBS_DEB_MAIN);
}

module_init(if_usb_init_module);
module_exit(if_usb_exit_module);

MODULE_DESCRIPTION("8388 USB WLAN Driver");
MODULE_AUTHOR("Marvell International Ltd.");
MODULE_LICENSE("GPL");