Commit 954ee164 authored by Dan Williams's avatar Dan Williams Committed by David S. Miller
Browse files

[PATCH] libertas: reorganize and simplify init sequence 



This patch moves all firmware load responsibility into the interface-specific
code and gets rid of the firmware pointer in the generic card structure.  It
also removes 3 fairly unecessary callbacks: hw_register_dev, hw_unregister_dev,
and hw_prog_firmware.  It also makes the init sequence from interface
probe functions more logical, as there are paired add/remove and start/stop
calls into generic libertas code.

Because the USB driver code uses the same TX URB callback for both firmware
upload (where the generic libertas structure isn't initialized yet) and for
normal operation (where it is), some bits of USB code have to deal with
'priv' being NULL.  All USB firmware upload bits have been changed to not
require 'priv' at all, but simply the USB card structure.

Signed-off-by: default avatarDan Williams <dcbw@redhat.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent b1b1907d

drivers/net/wireless/libertas/decl.h

+2 −1
Original line number Diff line number Diff line
@@ -72,8 +72,9 @@ void libertas_send_iwevcustom_event(wlan_private * priv, s8 * str); 
struct chan_freq_power *libertas_get_region_cfp_table(u8 region, u8 band,

						             int *cfp_no);

wlan_private *libertas_add_card(void *card, struct device *dmdev);

int libertas_activate_card(wlan_private *priv);

int libertas_remove_card(wlan_private *priv);

int libertas_start_card(wlan_private *priv);

int libertas_stop_card(wlan_private *priv);

int libertas_add_mesh(wlan_private *priv, struct device *dev);

void libertas_remove_mesh(wlan_private *priv);

int libertas_reset_device(wlan_private *priv);

drivers/net/wireless/libertas/dev.h

+0 −4
Original line number Diff line number Diff line
@@ -143,7 +143,6 @@ struct _wlan_private { 
	   all other bits reserved 0 */

	u8 dnld_sent;



	const struct firmware *firmware;

	struct device *hotplug_device;



	/** thread to service interrupts */
@@ -156,9 +155,6 @@ struct _wlan_private { 
	struct work_struct sync_channel;



	/** Hardware access */

	int (*hw_register_dev) (wlan_private * priv);

	int (*hw_unregister_dev) (wlan_private *);

	int (*hw_prog_firmware) (wlan_private *);

	int (*hw_host_to_card) (wlan_private * priv, u8 type, u8 * payload, u16 nb);

	int (*hw_get_int_status) (wlan_private * priv, u8 *);

	int (*hw_read_event_cause) (wlan_private *);

drivers/net/wireless/libertas/if_cs.c

+5 −49
Original line number Diff line number Diff line
@@ -608,51 +608,6 @@ done: 
/* Callback functions for libertas.ko                               */

/********************************************************************/



static int if_cs_register_dev(wlan_private *priv)

{

	struct if_cs_card *card = (struct if_cs_card *)priv->card;



	lbs_deb_enter(LBS_DEB_CS);



	card->priv = priv;



	return 0;

}





static int if_cs_unregister_dev(wlan_private *priv)

{

	lbs_deb_enter(LBS_DEB_CS);



	/*

	 * Nothing special here. Because the device's power gets turned off

	 * anyway, there's no need to send a RESET command like in if_usb.c

	 */



	return 0;

}





/*

 * This callback is a dummy. The reason is that the USB code needs

 * to have various things set up in order to be able to download the

 * firmware. That's not needed in our case.

 *

 * On the contrary, if libertas_add_card() has been called and we're

 * then later called via libertas_activate_card(), but without a valid

 * firmware, then it's quite tedious to tear down the half-installed

 * card. Therefore, we download the firmware before calling adding/

 * activating the card in the first place. If that doesn't work, we

 * won't call into libertas.ko at all.

 */



static int if_cs_prog_firmware(wlan_private *priv)

{

	priv->adapter->fw_ready = 1;

	return 0;

}





/* Send commands or data packets to the card */

static int if_cs_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)

{
@@ -902,14 +857,14 @@ static int if_cs_probe(struct pcmcia_device *p_dev) 
	}



	/* Store pointers to our call-back functions */

	card->priv = priv;

	priv->card = card;

	priv->hw_register_dev     = if_cs_register_dev;

	priv->hw_unregister_dev   = if_cs_unregister_dev;

	priv->hw_prog_firmware    = if_cs_prog_firmware;

	priv->hw_host_to_card     = if_cs_host_to_card;

	priv->hw_get_int_status   = if_cs_get_int_status;

	priv->hw_read_event_cause = if_cs_read_event_cause;



	priv->adapter->fw_ready = 1;



	/* Now actually get the IRQ */

	ret = request_irq(p_dev->irq.AssignedIRQ, if_cs_interrupt,

		IRQF_SHARED, DRV_NAME, card);
@@ -919,7 +874,7 @@ static int if_cs_probe(struct pcmcia_device *p_dev) 
	}



	/* And finally bring the card up */

	if (libertas_activate_card(priv) != 0) {

	if (libertas_start_card(priv) != 0) {

		lbs_pr_err("could not activate card\n");

		goto out3;

	}
@@ -951,6 +906,7 @@ static void if_cs_detach(struct pcmcia_device *p_dev) 


	lbs_deb_enter(LBS_DEB_CS);



	libertas_stop_card(card->priv);

	libertas_remove_card(card->priv);

	if_cs_release(p_dev);

	kfree(card);

drivers/net/wireless/libertas/if_usb.c

+162 −203
Original line number Diff line number Diff line
@@ -45,14 +45,14 @@ 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_register_dev(wlan_private * priv);

static int if_usb_unregister_dev(wlan_private *);

static int if_usb_prog_firmware(wlan_private *);

static int if_usb_prog_firmware(struct usb_card_rec *cardp);

static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);

static int if_usb_get_int_status(wlan_private * priv, u8 *);

static int if_usb_read_event_cause(wlan_private *);

static int usb_tx_block(wlan_private *priv, u8 *payload, u16 nb);

static int usb_tx_block(struct usb_card_rec *cardp, u8 *payload, u16 nb);

static void if_usb_free(struct usb_card_rec *cardp);

static int if_usb_submit_rx_urb(struct usb_card_rec *cardp);

static int if_usb_reset_device(struct usb_card_rec *cardp);



/**

 *  @brief  call back function to handle the status of the URB
@@ -61,30 +61,41 @@ static void if_usb_free(struct usb_card_rec *cardp); 
 */

static void if_usb_write_bulk_callback(struct urb *urb)

{

	wlan_private *priv = (wlan_private *) (urb->context);

	wlan_adapter *adapter = priv->adapter;

	struct net_device *dev = priv->dev;

	struct usb_card_rec *cardp = (struct usb_card_rec *) urb->context;



	/* handle the transmission complete validations */



	if (urb->status != 0) {

		/* print the failure status number for debug */

		lbs_pr_info("URB in failure status: %d\n", urb->status);

	} else {

	if (urb->status == 0) {

		wlan_private *priv = cardp->priv;



		/*

		lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");

		lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",

		       urb->actual_length);

		*/



		/* Used for both firmware TX and regular TX.  priv isn't

		 * valid at firmware load time.

		 */

		if (priv) {

			wlan_adapter *adapter = priv->adapter;

			struct net_device *dev = priv->dev;



			priv->dnld_sent = DNLD_RES_RECEIVED;



			/* Wake main thread if commands are pending */

			if (!adapter->cur_cmd)

				wake_up_interruptible(&priv->waitq);



			if ((adapter->connect_status == LIBERTAS_CONNECTED)) {

				netif_wake_queue(dev);

				netif_wake_queue(priv->mesh_dev);

			}

		}

	} else {

		/* print the failure status number for debug */

		lbs_pr_info("URB in failure status: %d\n", urb->status);

	}



	return;

}
@@ -205,24 +216,35 @@ static int if_usb_probe(struct usb_interface *intf, 
		}

	}



	/* Upload firmware */

	cardp->rinfo.cardp = cardp;

	if (if_usb_prog_firmware(cardp)) {

		lbs_deb_usbd(&udev->dev, "FW upload failed");

		goto err_prog_firmware;

	}



	if (!(priv = libertas_add_card(cardp, &udev->dev)))

		goto dealloc;

		goto err_prog_firmware;



	udev->dev.driver_data = priv;

	cardp->priv = priv;



	if (libertas_add_mesh(priv, &udev->dev))

		goto err_add_mesh;



	priv->hw_register_dev = if_usb_register_dev;

	priv->hw_unregister_dev = if_usb_unregister_dev;

	priv->hw_prog_firmware = if_usb_prog_firmware;

	cardp->eth_dev = priv->dev;



	priv->hw_host_to_card = if_usb_host_to_card;

	priv->hw_get_int_status = if_usb_get_int_status;

	priv->hw_read_event_cause = if_usb_read_event_cause;

	priv->boot2_version = udev->descriptor.bcdDevice;



	if (libertas_activate_card(priv))

		goto err_activate_card;

	/* Delay 200 ms to waiting for the FW ready */

	if_usb_submit_rx_urb(cardp);

	msleep_interruptible(200);

	priv->adapter->fw_ready = 1;



	if (libertas_start_card(priv))

		goto err_start_card;



	list_add_tail(&cardp->list, &usb_devices);
@@ -231,11 +253,12 @@ static int if_usb_probe(struct usb_interface *intf, 


	return 0;



err_activate_card:

err_start_card:

	libertas_remove_mesh(priv);

err_add_mesh:

	free_netdev(priv->dev);

	kfree(priv->adapter);

	libertas_remove_card(priv);

err_prog_firmware:

	if_usb_reset_device(cardp);

dealloc:

	if_usb_free(cardp);
@@ -252,21 +275,22 @@ static void if_usb_disconnect(struct usb_interface *intf) 
{

	struct usb_card_rec *cardp = usb_get_intfdata(intf);

	wlan_private *priv = (wlan_private *) cardp->priv;

	wlan_adapter *adapter = NULL;



	adapter = priv->adapter;

	lbs_deb_enter(LBS_DEB_MAIN);



	/*

	 * Update Surprise removed to TRUE

	 */

	adapter->surpriseremoved = 1;

	/* Update Surprise removed to TRUE */

	cardp->surprise_removed = 1;



	list_del(&cardp->list);



	/* card is removed and we can call wlan_remove_card */

	lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");

	if (priv) {

		wlan_adapter *adapter = priv->adapter;



		adapter->surpriseremoved = 1;

		libertas_stop_card(priv);

		libertas_remove_mesh(priv);

		libertas_remove_card(priv);

	}



	/* Unlink and free urb */

	if_usb_free(cardp);
@@ -274,7 +298,7 @@ static void if_usb_disconnect(struct usb_interface *intf) 
	usb_set_intfdata(intf, NULL);

	usb_put_dev(interface_to_usbdev(intf));



	return;

	lbs_deb_leave(LBS_DEB_MAIN);

}



/**
@@ -282,12 +306,11 @@ static void if_usb_disconnect(struct usb_interface *intf) 
 *  @param priv		pointer to wlan_private

 *  @return 	   	0

 */

static int if_prog_firmware(wlan_private * priv)

static int if_prog_firmware(struct usb_card_rec *cardp)

{

	struct usb_card_rec *cardp = priv->card;

	struct FWData *fwdata;

	struct fwheader *fwheader;

	u8 *firmware = priv->firmware->data;

	u8 *firmware = cardp->fw->data;



	fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
@@ -335,7 +358,7 @@ static int if_prog_firmware(wlan_private * priv) 
			    cardp->totalbytes);

		*/

		memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);

		usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);

		usb_tx_block(cardp, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);



	} else if (fwdata->fwheader.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {

		/*
@@ -345,7 +368,7 @@ static int if_prog_firmware(wlan_private * priv) 
			    "Donwloading FW JUMP BLOCK\n");

		*/

		memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);

		usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);

		usb_tx_block(cardp, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);

		cardp->fwfinalblk = 1;

	}
@@ -360,10 +383,10 @@ static int if_prog_firmware(wlan_private * priv) 
	return 0;

}



static int if_usb_reset_device(wlan_private *priv)

static int if_usb_reset_device(struct usb_card_rec *cardp)

{

	int ret;

	struct usb_card_rec *cardp = priv->card;

	wlan_private * priv = cardp->priv;



	lbs_deb_enter(LBS_DEB_USB);
@@ -371,7 +394,7 @@ static int if_usb_reset_device(wlan_private *priv) 
	 * command to the firmware.

	 */

	ret = usb_reset_device(cardp->udev);

	if (!ret) {

	if (!ret && priv) {

		msleep(10);

		ret = libertas_reset_device(priv);

		msleep(10);
@@ -389,14 +412,12 @@ static int if_usb_reset_device(wlan_private *priv) 
 *  @param nb		data length

 *  @return 	   	0 or -1

 */

static int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)

static int usb_tx_block(struct usb_card_rec *cardp, u8 * payload, u16 nb)

{

	/* pointer to card structure */

	struct usb_card_rec *cardp = priv->card;

	int ret = -1;



	/* check if device is removed */

	if (priv->adapter->surpriseremoved) {

	if (cardp->surprise_removed) {

		lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");

		goto tx_ret;

	}
@@ -404,7 +425,7 @@ static int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb) 
	usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,

			  usb_sndbulkpipe(cardp->udev,

					  cardp->bulk_out_endpointAddr),

			  payload, nb, if_usb_write_bulk_callback, priv);

			  payload, nb, if_usb_write_bulk_callback, cardp);



	cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
@@ -421,11 +442,9 @@ tx_ret: 
	return ret;

}



static int __if_usb_submit_rx_urb(wlan_private * priv,

				  void (*callbackfn)

				  (struct urb *urb))

static int __if_usb_submit_rx_urb(struct usb_card_rec *cardp,

				  void (*callbackfn)(struct urb *urb))

{

	struct usb_card_rec *cardp = priv->card;

	struct sk_buff *skb;

	struct read_cb_info *rinfo = &cardp->rinfo;

	int ret = -1;
@@ -461,22 +480,21 @@ rx_ret: 
	return ret;

}



static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)

static int if_usb_submit_rx_urb_fwload(struct usb_card_rec *cardp)

{

	return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);

	return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);

}



static inline int if_usb_submit_rx_urb(wlan_private * priv)

static int if_usb_submit_rx_urb(struct usb_card_rec *cardp)

{

	return __if_usb_submit_rx_urb(priv, &if_usb_receive);

	return __if_usb_submit_rx_urb(cardp, &if_usb_receive);

}



static void if_usb_receive_fwload(struct urb *urb)

{

	struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;

	wlan_private *priv = rinfo->priv;

	struct sk_buff *skb = rinfo->skb;

	struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;

	struct usb_card_rec *cardp = (struct usb_card_rec *)rinfo->cardp;

	struct fwsyncheader *syncfwheader;

	struct bootcmdrespStr bootcmdresp;
@@ -492,7 +510,7 @@ static void if_usb_receive_fwload(struct urb *urb) 
			sizeof(bootcmdresp));

		if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {

			kfree_skb(skb);

			if_usb_submit_rx_urb_fwload(priv);

			if_usb_submit_rx_urb_fwload(cardp);

			cardp->bootcmdresp = 1;

			lbs_deb_usbd(&cardp->udev->dev,

				    "Received valid boot command response\n");
@@ -516,7 +534,7 @@ static void if_usb_receive_fwload(struct urb *urb) 
				    "Received valid boot command response\n");

		}

		kfree_skb(skb);

		if_usb_submit_rx_urb_fwload(priv);

		if_usb_submit_rx_urb_fwload(cardp);

		return;

	}
@@ -552,9 +570,9 @@ static void if_usb_receive_fwload(struct urb *urb) 
		goto exit;

	}



	if_prog_firmware(priv);

	if_prog_firmware(cardp);



	if_usb_submit_rx_urb_fwload(priv);

	if_usb_submit_rx_urb_fwload(cardp);

exit:

	kfree(syncfwheader);
@@ -633,9 +651,9 @@ static inline void process_cmdrequest(int recvlength, u8 *recvbuff, 
static void if_usb_receive(struct urb *urb)

{

	struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;

	wlan_private *priv = rinfo->priv;

	struct sk_buff *skb = rinfo->skb;

	struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;

	struct usb_card_rec *cardp = (struct usb_card_rec *) rinfo->cardp;

	wlan_private * priv = cardp->priv;



	int recvlength = urb->actual_length;

	u8 *recvbuff = NULL;
@@ -696,7 +714,7 @@ static void if_usb_receive(struct urb *urb) 
	}



setup_for_next:

	if_usb_submit_rx_urb(priv);

	if_usb_submit_rx_urb(cardp);

rx_exit:

	lbs_deb_leave(LBS_DEB_USB);

}
@@ -731,7 +749,7 @@ static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 n 


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



	return usb_tx_block(priv, cardp->bulk_out_buffer,

	return usb_tx_block(cardp, cardp->bulk_out_buffer,

	                    nb + MESSAGE_HEADER_LEN);

}
@@ -751,46 +769,10 @@ static int if_usb_get_int_status(wlan_private * priv, u8 * ireg) 
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(priv);

	return 0;

}



static int if_usb_unregister_dev(wlan_private * priv)

{

	int ret = 0;



	/* Need to send a Reset command to device before USB resources freed

	 * and wlan_remove_card() called, then device can handle FW download

	 * again.

	 */

	if (priv)

		libertas_reset_device(priv);



	return ret;

}





/**

 *  @brief  This function register usb device and initialize parameter

 *  @param		priv pointer to wlan_private

 *  @return		0 or -1

 */

static int if_usb_register_dev(wlan_private * priv)

{

	struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;



	lbs_deb_enter(LBS_DEB_USB);



	cardp->priv = priv;

	cardp->eth_dev = priv->dev;

	priv->hotplug_device = &(cardp->udev->dev);



	lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",

		    cardp->udev);



	lbs_deb_leave(LBS_DEB_USB);

	if_usb_submit_rx_urb(cardp);

	return 0;

}
@@ -800,9 +782,8 @@ static int if_usb_register_dev(wlan_private * priv) 
 *                  2:Boot from FW in EEPROM

 *  @return 	   	0

 */

static int if_usb_issue_boot_command(wlan_private *priv, int ivalue)

static int if_usb_issue_boot_command(struct usb_card_rec *cardp, int ivalue)

{

	struct usb_card_rec	*cardp = priv->card;

	struct bootcmdstr sbootcmd;

	int i;
@@ -814,28 +795,83 @@ static int if_usb_issue_boot_command(wlan_private *priv, int ivalue) 
	memcpy(cardp->bulk_out_buffer, &sbootcmd, sizeof(struct bootcmdstr));



	/* Issue command */

	usb_tx_block(priv, cardp->bulk_out_buffer, sizeof(struct bootcmdstr));

	usb_tx_block(cardp, cardp->bulk_out_buffer, sizeof(struct bootcmdstr));



	return 0;

}





static int if_usb_do_prog_firmware(wlan_private * priv)

/**

 *  @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)

{

	struct usb_card_rec *cardp = priv->card;

	int i = 0;

	static int reset_count = 10;

	int ret = 0;



	lbs_deb_enter(LBS_DEB_USB);



	cardp->rinfo.priv = priv;

	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(priv) < 0) {

	if (if_usb_submit_rx_urb_fwload(cardp) < 0) {

		lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");

		ret = -1;

		goto done;

		goto release_fw;

	}



	cardp->bootcmdresp = 0;
@@ -843,7 +879,7 @@ restart: 
		int j = 0;

		i++;

		/* Issue Boot command = 1, Boot from Download-FW */

		if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);

		if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);

		/* wait for command response */

		do {

			j++;
@@ -853,14 +889,13 @@ restart: 


	if (cardp->bootcmdresp == 0) {

		if (--reset_count >= 0) {

			if_usb_reset_device(priv);

			if_usb_reset_device(cardp);

			goto restart;

		}

		return -1;

	}



	i = 0;

	priv->adapter->fw_ready = 0;



	cardp->totalbytes = 0;

	cardp->fwlastblksent = 0;
@@ -870,113 +905,37 @@ restart: 
	cardp->totalbytes = 0;

	cardp->fwfinalblk = 0;



	if_prog_firmware(priv);

	if_prog_firmware(cardp);



	do {

		lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");

		i++;

		msleep_interruptible(100);

		if (priv->adapter->surpriseremoved || i >= 20)

		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(priv);

			if_usb_reset_device(cardp);

			goto restart;

		}



		lbs_pr_info("FW download failure, time = %d ms\n", i * 100);

		ret = -1;

		goto done;

		goto release_fw;

	}



	if_usb_submit_rx_urb(priv);



	/* Delay 200 ms to waiting for the FW ready */

	msleep_interruptible(200);



	priv->adapter->fw_ready = 1;

release_fw:

	release_firmware(cardp->fw);

	cardp->fw = NULL;



done:

	lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);

	return ret;

}



/**

 *  @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(wlan_private *priv)

{

	int ret = -1;



	lbs_deb_enter(LBS_DEB_FW);



	if ((ret = request_firmware(&priv->firmware, libertas_fw_name,

				    priv->hotplug_device)) < 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(priv->firmware->data, priv->firmware->size)) {

		release_firmware(priv->firmware);

		goto done;

	}



	ret = if_usb_do_prog_firmware(priv);



	release_firmware(priv->firmware);

done:

	return ret;

}





#ifdef CONFIG_PM

static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)

drivers/net/wireless/libertas/if_usb.h

+3 −1
Original line number Diff line number Diff line
@@ -38,7 +38,7 @@ struct bootcmdrespStr 


/* read callback private data */

struct read_cb_info {

        wlan_private *priv;

        struct usb_card_rec *cardp;

        struct sk_buff *skb;

};
@@ -58,6 +58,7 @@ struct usb_card_rec { 
	int bulk_out_size;

	u8 bulk_out_endpointAddr;



	const struct firmware *fw;

	u8 CRC_OK;

	u32 fwseqnum;

	u32 lastseqnum;
@@ -65,6 +66,7 @@ struct usb_card_rec { 
	u32 fwlastblksent;

	u8 fwdnldover;

	u8 fwfinalblk;

	u8 surprise_removed;



	u32 usb_event_cause;

	u8 usb_int_cause;

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