bcmdhd.100.10.315.x/bcmsdspi_linux.c - kernel/amlogic-tv-modules/dhd-driver - Git at Google

 /*
  * Broadcom SPI Host Controller Driver - Linux Per-port
  *
  * Copyright (C) 1999-2019, Broadcom.
  *
  *      Unless you and Broadcom execute a separate written software license
  * agreement governing use of this software, this software is licensed to you
  * under the terms of the GNU General Public License version 2 (the "GPL"),
  * available at http://www.broadcom.com/licenses/GPLv2.php, with the
  * following added to such license:
  *
  *      As a special exception, the copyright holders of this software give you
  * permission to link this software with independent modules, and to copy and
  * distribute the resulting executable under terms of your choice, provided that
  * you also meet, for each linked independent module, the terms and conditions of
  * the license of that module.  An independent module is a module which is not
  * derived from this software.  The special exception does not apply to any
  * modifications of the software.
  *
  *      Notwithstanding the above, under no circumstances may you combine this
  * software in any way with any other Broadcom software provided under a license
  * other than the GPL, without Broadcom's express prior written consent.
  *
  *
  * <<Broadcom-WL-IPTag/Open:>>
  *
  * $Id: bcmsdspi_linux.c 514727 2014-11-12 03:02:48Z $
  */

 #include <typedefs.h>
 #include <bcmutils.h>

 #include <bcmsdbus.h>		/* bcmsdh to/from specific controller APIs */
 #include <sdiovar.h>		/* to get msglevel bit values */

 #ifdef BCMSPI_ANDROID
 #include <bcmsdh.h>
 #include <bcmspibrcm.h>
 #include <linux/spi/spi.h>
 #else
 #include <pcicfg.h>
 #include <sdio.h>		/* SDIO Device and Protocol Specs */
 #include <linux/sched.h>	/* request_irq(), free_irq() */
 #include <bcmsdspi.h>
 #include <bcmspi.h>
 #endif /* BCMSPI_ANDROID */

 #ifndef BCMSPI_ANDROID
 extern uint sd_crc;
 module_param(sd_crc, uint, 0);

 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
 #define KERNEL26
 #endif // endif
 #endif /* !BCMSPI_ANDROID */

 struct sdos_info {
 	sdioh_info_t *sd;
 	spinlock_t lock;
 #ifndef BCMSPI_ANDROID
 	wait_queue_head_t intr_wait_queue;
 #endif /* !BCMSPI_ANDROID */
 };

 #ifndef BCMSPI_ANDROID
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
 #define BLOCKABLE()	(!in_atomic())
 #else
 #define BLOCKABLE()	(!in_interrupt())
 #endif // endif

 /* Interrupt handler */
 static irqreturn_t
 sdspi_isr(int irq, void *dev_id
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
 , struct pt_regs *ptregs
 #endif // endif
 )
 {
 	sdioh_info_t *sd;
 	struct sdos_info *sdos;
 	bool ours;

 	sd = (sdioh_info_t *)dev_id;
 	sd->local_intrcount++;

 	if (!sd->card_init_done) {
 		sd_err(("%s: Hey Bogus intr...not even initted: irq %d\n", __FUNCTION__, irq));
 		return IRQ_RETVAL(FALSE);
 	} else {
 		ours = spi_check_client_intr(sd, NULL);

 		/* For local interrupts, wake the waiting process */
 		if (ours && sd->got_hcint) {
 			sdos = (struct sdos_info *)sd->sdos_info;
 			wake_up_interruptible(&sdos->intr_wait_queue);
 		}

 		return IRQ_RETVAL(ours);
 	}
 }
 #endif /* !BCMSPI_ANDROID */

 #ifdef BCMSPI_ANDROID
 static struct spi_device *gBCMSPI = NULL;

 extern int bcmsdh_probe(struct device *dev);
 extern int bcmsdh_remove(struct device *dev);

 static int bcmsdh_spi_probe(struct spi_device *spi_dev)
 {
 	int ret = 0;

 	gBCMSPI = spi_dev;

 #ifdef SPI_PIO_32BIT_RW
 	spi_dev->bits_per_word = 32;
 #else
 	spi_dev->bits_per_word = 8;
 #endif /* SPI_PIO_32BIT_RW */
 	ret = spi_setup(spi_dev);

 	if (ret) {
 		sd_err(("bcmsdh_spi_probe: spi_setup fail with %d\n", ret));
 	}
 	sd_err(("bcmsdh_spi_probe: spi_setup with %d, bits_per_word=%d\n",
 		ret, spi_dev->bits_per_word));
 	ret = bcmsdh_probe(&spi_dev->dev);

 	return ret;
 }

 static int  bcmsdh_spi_remove(struct spi_device *spi_dev)
 {
 	int ret = 0;

 	ret = bcmsdh_remove(&spi_dev->dev);
 	gBCMSPI = NULL;

 	return ret;
 }

 static struct spi_driver bcmsdh_spi_driver = {
 	.probe		= bcmsdh_spi_probe,
 	.remove		= bcmsdh_spi_remove,
 	.driver		= {
 		.name = "wlan_spi",
 		.bus    = &spi_bus_type,
 		.owner  = THIS_MODULE,
 		},
 };

 /*
  * module init
 */
 int bcmsdh_register_client_driver(void)
 {
 	int error = 0;
 	sd_trace(("bcmsdh_gspi: %s Enter\n", __FUNCTION__));

 	error = spi_register_driver(&bcmsdh_spi_driver);

 	return error;
 }

 /*
  * module cleanup
 */
 void bcmsdh_unregister_client_driver(void)
 {
 	sd_trace(("%s Enter\n", __FUNCTION__));
 	spi_unregister_driver(&bcmsdh_spi_driver);
 }
 #endif /* BCMSPI_ANDROID */

 /* Register with Linux for interrupts */
 int
 spi_register_irq(sdioh_info_t *sd, uint irq)
 {
 #ifndef BCMSPI_ANDROID
 	sd_trace(("Entering %s: irq == %d\n", __FUNCTION__, irq));
 	if (request_irq(irq, sdspi_isr, IRQF_SHARED, "bcmsdspi", sd) < 0) {
 		sd_err(("%s: request_irq() failed\n", __FUNCTION__));
 		return ERROR;
 	}
 #endif /* !BCMSPI_ANDROID */
 	return SUCCESS;
 }

 /* Free Linux irq */
 void
 spi_free_irq(uint irq, sdioh_info_t *sd)
 {
 #ifndef BCMSPI_ANDROID
 	free_irq(irq, sd);
 #endif /* !BCMSPI_ANDROID */
 }

 /* Map Host controller registers */
 #ifndef BCMSPI_ANDROID
 uint32 *
 spi_reg_map(osl_t *osh, uintptr addr, int size)
 {
 	return (uint32 *)REG_MAP(addr, size);
 }

 void
 spi_reg_unmap(osl_t *osh, uintptr addr, int size)
 {
 	REG_UNMAP((void*)(uintptr)addr);
 }
 #endif /* !BCMSPI_ANDROID */

 int
 spi_osinit(sdioh_info_t *sd)
 {
 	struct sdos_info *sdos;

 	sdos = (struct sdos_info*)MALLOC(sd->osh, sizeof(struct sdos_info));
 	sd->sdos_info = (void*)sdos;
 	if (sdos == NULL)
 		return BCME_NOMEM;

 	sdos->sd = sd;
 	spin_lock_init(&sdos->lock);
 #ifndef BCMSPI_ANDROID
 	init_waitqueue_head(&sdos->intr_wait_queue);
 #endif /* !BCMSPI_ANDROID */
 	return BCME_OK;
 }

 void
 spi_osfree(sdioh_info_t *sd)
 {
 	struct sdos_info *sdos;
 	ASSERT(sd && sd->sdos_info);

 	sdos = (struct sdos_info *)sd->sdos_info;
 	MFREE(sd->osh, sdos, sizeof(struct sdos_info));
 }

 /* Interrupt enable/disable */
 SDIOH_API_RC
 sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
 {
 	ulong flags;
 	struct sdos_info *sdos;

 	sd_trace(("%s: %s\n", __FUNCTION__, enable ? "Enabling" : "Disabling"));

 	sdos = (struct sdos_info *)sd->sdos_info;
 	ASSERT(sdos);

 	if (!(sd->host_init_done && sd->card_init_done)) {
 		sd_err(("%s: Card & Host are not initted - bailing\n", __FUNCTION__));
 		return SDIOH_API_RC_FAIL;
 	}

 #ifndef BCMSPI_ANDROID
 	if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
 		sd_err(("%s: no handler registered, will not enable\n", __FUNCTION__));
 		return SDIOH_API_RC_FAIL;
 	}
 #endif /* !BCMSPI_ANDROID */

 	/* Ensure atomicity for enable/disable calls */
 	spin_lock_irqsave(&sdos->lock, flags);

 	sd->client_intr_enabled = enable;
 #ifndef BCMSPI_ANDROID
 	if (enable && !sd->lockcount)
 		spi_devintr_on(sd);
 	else
 		spi_devintr_off(sd);
 #endif /* !BCMSPI_ANDROID */

 	spin_unlock_irqrestore(&sdos->lock, flags);

 	return SDIOH_API_RC_SUCCESS;
 }

 /* Protect against reentrancy (disable device interrupts while executing) */
 void
 spi_lock(sdioh_info_t *sd)
 {
 	ulong flags;
 	struct sdos_info *sdos;

 	sdos = (struct sdos_info *)sd->sdos_info;
 	ASSERT(sdos);

 	sd_trace(("%s: %d\n", __FUNCTION__, sd->lockcount));

 	spin_lock_irqsave(&sdos->lock, flags);
 	if (sd->lockcount) {
 		sd_err(("%s: Already locked!\n", __FUNCTION__));
 		ASSERT(sd->lockcount == 0);
 	}
 #ifdef BCMSPI_ANDROID
 	if (sd->client_intr_enabled)
 		bcmsdh_oob_intr_set(0);
 #else
 	spi_devintr_off(sd);
 #endif /* BCMSPI_ANDROID */
 	sd->lockcount++;
 	spin_unlock_irqrestore(&sdos->lock, flags);
 }

 /* Enable client interrupt */
 void
 spi_unlock(sdioh_info_t *sd)
 {
 	ulong flags;
 	struct sdos_info *sdos;

 	sd_trace(("%s: %d, %d\n", __FUNCTION__, sd->lockcount, sd->client_intr_enabled));
 	ASSERT(sd->lockcount > 0);

 	sdos = (struct sdos_info *)sd->sdos_info;
 	ASSERT(sdos);

 	spin_lock_irqsave(&sdos->lock, flags);
 	if (--sd->lockcount == 0 && sd->client_intr_enabled) {
 #ifdef BCMSPI_ANDROID
 		bcmsdh_oob_intr_set(1);
 #else
 		spi_devintr_on(sd);
 #endif /* BCMSPI_ANDROID */
 	}
 	spin_unlock_irqrestore(&sdos->lock, flags);
 }

 #ifndef BCMSPI_ANDROID
 void spi_waitbits(sdioh_info_t *sd, bool yield)
 {
 #ifndef BCMSDYIELD
 	ASSERT(!yield);
 #endif // endif
 	sd_trace(("%s: yield %d canblock %d\n",
 	          __FUNCTION__, yield, BLOCKABLE()));

 	/* Clear the "interrupt happened" flag and last intrstatus */
 	sd->got_hcint = FALSE;

 #ifdef BCMSDYIELD
 	if (yield && BLOCKABLE()) {
 		struct sdos_info *sdos;
 		sdos = (struct sdos_info *)sd->sdos_info;
 		/* Wait for the indication, the interrupt will be masked when the ISR fires. */
 		wait_event_interruptible(sdos->intr_wait_queue, (sd->got_hcint));
 	} else
 #endif /* BCMSDYIELD */
 	{
 		spi_spinbits(sd);
 	}

 }
 #else /* !BCMSPI_ANDROID */
 int bcmgspi_dump = 0;		/* Set to dump complete trace of all SPI bus transactions */

 static void
 hexdump(char *pfx, unsigned char *msg, int msglen)
 {
 	int i, col;
 	char buf[80];

 	ASSERT(strlen(pfx) + 49 <= sizeof(buf));

 	col = 0;

 	for (i = 0; i < msglen; i++, col++) {
 		if (col % 16 == 0)
 			strcpy(buf, pfx);
 		sprintf(buf + strlen(buf), "%02x", msg[i]);
 		if ((col + 1) % 16 == 0)
 			printf("%s\n", buf);
 		else
 			sprintf(buf + strlen(buf), " ");
 	}

 	if (col % 16 != 0)
 		printf("%s\n", buf);
 }

 /* Send/Receive an SPI Packet */
 void
 spi_sendrecv(sdioh_info_t *sd, uint8 *msg_out, uint8 *msg_in, int msglen)
 {
 	int write = 0;
 	int tx_len = 0;
 	struct spi_message msg;
 	struct spi_transfer t[2];

 	spi_message_init(&msg);
 	memset(t, 0, 2*sizeof(struct spi_transfer));

 	if (sd->wordlen == 2)
 #if !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW))
 		write = msg_out[2] & 0x80;
 #else
 		write = msg_out[1] & 0x80;
 #endif /* !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW)) */
 	if (sd->wordlen == 4)
 #if !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW))
 		write = msg_out[0] & 0x80;
 #else
 		write = msg_out[3] & 0x80;
 #endif /* !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW)) */

 	if (bcmgspi_dump) {
 		hexdump(" OUT: ", msg_out, msglen);
 	}

 	tx_len = write ? msglen-4 : 4;

 	sd_trace(("spi_sendrecv: %s, wordlen %d, cmd : 0x%02x 0x%02x 0x%02x 0x%02x\n",
 		write ? "WR" : "RD", sd->wordlen,
 		msg_out[0], msg_out[1], msg_out[2], msg_out[3]));

 	t[0].tx_buf = (char *)&msg_out[0];
 	t[0].rx_buf = 0;
 	t[0].len = tx_len;

 	spi_message_add_tail(&t[0], &msg);

 	t[1].rx_buf = (char *)&msg_in[tx_len];
 	t[1].tx_buf = 0;
 	t[1].len = msglen-tx_len;

 	spi_message_add_tail(&t[1], &msg);
 	spi_sync(gBCMSPI, &msg);

 	if (bcmgspi_dump) {
 		hexdump(" IN  : ", msg_in, msglen);
 	}
 }
 #endif /* !BCMSPI_ANDROID */
	/*
	* Broadcom SPI Host Controller Driver - Linux Per-port
	*
	* Copyright (C) 1999-2019, Broadcom.
	*
	* Unless you and Broadcom execute a separate written software license
	* agreement governing use of this software, this software is licensed to you
	* under the terms of the GNU General Public License version 2 (the "GPL"),
	* available at http://www.broadcom.com/licenses/GPLv2.php, with the
	* following added to such license:
	*
	* As a special exception, the copyright holders of this software give you
	* permission to link this software with independent modules, and to copy and
	* distribute the resulting executable under terms of your choice, provided that
	* you also meet, for each linked independent module, the terms and conditions of
	* the license of that module. An independent module is a module which is not
	* derived from this software. The special exception does not apply to any
	* modifications of the software.
	*
	* Notwithstanding the above, under no circumstances may you combine this
	* software in any way with any other Broadcom software provided under a license
	* other than the GPL, without Broadcom's express prior written consent.
	*
	*
	* <<Broadcom-WL-IPTag/Open:>>
	*
	* $Id: bcmsdspi_linux.c 514727 2014-11-12 03:02:48Z $
	*/

	#include <typedefs.h>
	#include <bcmutils.h>

	#include <bcmsdbus.h> /* bcmsdh to/from specific controller APIs */
	#include <sdiovar.h> /* to get msglevel bit values */

	#ifdef BCMSPI_ANDROID
	#include <bcmsdh.h>
	#include <bcmspibrcm.h>
	#include <linux/spi/spi.h>
	#else
	#include <pcicfg.h>
	#include <sdio.h> /* SDIO Device and Protocol Specs */
	#include <linux/sched.h> /* request_irq(), free_irq() */
	#include <bcmsdspi.h>
	#include <bcmspi.h>
	#endif /* BCMSPI_ANDROID */

	#ifndef BCMSPI_ANDROID
	extern uint sd_crc;
	module_param(sd_crc, uint, 0);

	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
	#define KERNEL26
	#endif // endif
	#endif /* !BCMSPI_ANDROID */

	struct sdos_info {
	sdioh_info_t *sd;
	spinlock_t lock;
	#ifndef BCMSPI_ANDROID
	wait_queue_head_t intr_wait_queue;
	#endif /* !BCMSPI_ANDROID */
	};

	#ifndef BCMSPI_ANDROID
	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
	#define BLOCKABLE() (!in_atomic())
	#else
	#define BLOCKABLE() (!in_interrupt())
	#endif // endif

	/* Interrupt handler */
	static irqreturn_t
	sdspi_isr(int irq, void *dev_id
	#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
	, struct pt_regs *ptregs
	#endif // endif
	)
	{
	sdioh_info_t *sd;
	struct sdos_info *sdos;
	bool ours;

	sd = (sdioh_info_t *)dev_id;
	sd->local_intrcount++;

	if (!sd->card_init_done) {
	sd_err(("%s: Hey Bogus intr...not even initted: irq %d\n", __FUNCTION__, irq));
	return IRQ_RETVAL(FALSE);
	} else {
	ours = spi_check_client_intr(sd, NULL);

	/* For local interrupts, wake the waiting process */
	if (ours && sd->got_hcint) {
	sdos = (struct sdos_info *)sd->sdos_info;
	wake_up_interruptible(&sdos->intr_wait_queue);
	}

	return IRQ_RETVAL(ours);
	}
	}
	#endif /* !BCMSPI_ANDROID */

	#ifdef BCMSPI_ANDROID
	static struct spi_device *gBCMSPI = NULL;

	extern int bcmsdh_probe(struct device *dev);
	extern int bcmsdh_remove(struct device *dev);

	static int bcmsdh_spi_probe(struct spi_device *spi_dev)
	{
	int ret = 0;

	gBCMSPI = spi_dev;

	#ifdef SPI_PIO_32BIT_RW
	spi_dev->bits_per_word = 32;
	#else
	spi_dev->bits_per_word = 8;
	#endif /* SPI_PIO_32BIT_RW */
	ret = spi_setup(spi_dev);

	if (ret) {
	sd_err(("bcmsdh_spi_probe: spi_setup fail with %d\n", ret));
	}
	sd_err(("bcmsdh_spi_probe: spi_setup with %d, bits_per_word=%d\n",
	ret, spi_dev->bits_per_word));
	ret = bcmsdh_probe(&spi_dev->dev);

	return ret;
	}

	static int bcmsdh_spi_remove(struct spi_device *spi_dev)
	{
	int ret = 0;

	ret = bcmsdh_remove(&spi_dev->dev);
	gBCMSPI = NULL;

	return ret;
	}

	static struct spi_driver bcmsdh_spi_driver = {
	.probe = bcmsdh_spi_probe,
	.remove = bcmsdh_spi_remove,
	.driver = {
	.name = "wlan_spi",
	.bus = &spi_bus_type,
	.owner = THIS_MODULE,
	},
	};

	/*
	* module init
	*/
	int bcmsdh_register_client_driver(void)
	{
	int error = 0;
	sd_trace(("bcmsdh_gspi: %s Enter\n", __FUNCTION__));

	error = spi_register_driver(&bcmsdh_spi_driver);

	return error;
	}

	/*
	* module cleanup
	*/
	void bcmsdh_unregister_client_driver(void)
	{
	sd_trace(("%s Enter\n", __FUNCTION__));
	spi_unregister_driver(&bcmsdh_spi_driver);
	}
	#endif /* BCMSPI_ANDROID */

	/* Register with Linux for interrupts */
	int
	spi_register_irq(sdioh_info_t *sd, uint irq)
	{
	#ifndef BCMSPI_ANDROID
	sd_trace(("Entering %s: irq == %d\n", __FUNCTION__, irq));
	if (request_irq(irq, sdspi_isr, IRQF_SHARED, "bcmsdspi", sd) < 0) {
	sd_err(("%s: request_irq() failed\n", __FUNCTION__));
	return ERROR;
	}
	#endif /* !BCMSPI_ANDROID */
	return SUCCESS;
	}

	/* Free Linux irq */
	void
	spi_free_irq(uint irq, sdioh_info_t *sd)
	{
	#ifndef BCMSPI_ANDROID
	free_irq(irq, sd);
	#endif /* !BCMSPI_ANDROID */
	}

	/* Map Host controller registers */
	#ifndef BCMSPI_ANDROID
	uint32 *
	spi_reg_map(osl_t *osh, uintptr addr, int size)
	{
	return (uint32 *)REG_MAP(addr, size);
	}

	void
	spi_reg_unmap(osl_t *osh, uintptr addr, int size)
	{
	REG_UNMAP((void*)(uintptr)addr);
	}
	#endif /* !BCMSPI_ANDROID */

	int
	spi_osinit(sdioh_info_t *sd)
	{
	struct sdos_info *sdos;

	sdos = (struct sdos_info*)MALLOC(sd->osh, sizeof(struct sdos_info));
	sd->sdos_info = (void*)sdos;
	if (sdos == NULL)
	return BCME_NOMEM;

	sdos->sd = sd;
	spin_lock_init(&sdos->lock);
	#ifndef BCMSPI_ANDROID
	init_waitqueue_head(&sdos->intr_wait_queue);
	#endif /* !BCMSPI_ANDROID */
	return BCME_OK;
	}

	void
	spi_osfree(sdioh_info_t *sd)
	{
	struct sdos_info *sdos;
	ASSERT(sd && sd->sdos_info);

	sdos = (struct sdos_info *)sd->sdos_info;
	MFREE(sd->osh, sdos, sizeof(struct sdos_info));
	}

	/* Interrupt enable/disable */
	SDIOH_API_RC
	sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
	{
	ulong flags;
	struct sdos_info *sdos;

	sd_trace(("%s: %s\n", __FUNCTION__, enable ? "Enabling" : "Disabling"));

	sdos = (struct sdos_info *)sd->sdos_info;
	ASSERT(sdos);

	if (!(sd->host_init_done && sd->card_init_done)) {
	sd_err(("%s: Card & Host are not initted - bailing\n", __FUNCTION__));
	return SDIOH_API_RC_FAIL;
	}

	#ifndef BCMSPI_ANDROID
	if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
	sd_err(("%s: no handler registered, will not enable\n", __FUNCTION__));
	return SDIOH_API_RC_FAIL;
	}
	#endif /* !BCMSPI_ANDROID */

	/* Ensure atomicity for enable/disable calls */
	spin_lock_irqsave(&sdos->lock, flags);

	sd->client_intr_enabled = enable;
	#ifndef BCMSPI_ANDROID
	if (enable && !sd->lockcount)
	spi_devintr_on(sd);
	else
	spi_devintr_off(sd);
	#endif /* !BCMSPI_ANDROID */

	spin_unlock_irqrestore(&sdos->lock, flags);

	return SDIOH_API_RC_SUCCESS;
	}

	/* Protect against reentrancy (disable device interrupts while executing) */
	void
	spi_lock(sdioh_info_t *sd)
	{
	ulong flags;
	struct sdos_info *sdos;

	sdos = (struct sdos_info *)sd->sdos_info;
	ASSERT(sdos);

	sd_trace(("%s: %d\n", __FUNCTION__, sd->lockcount));

	spin_lock_irqsave(&sdos->lock, flags);
	if (sd->lockcount) {
	sd_err(("%s: Already locked!\n", __FUNCTION__));
	ASSERT(sd->lockcount == 0);
	}
	#ifdef BCMSPI_ANDROID
	if (sd->client_intr_enabled)
	bcmsdh_oob_intr_set(0);
	#else
	spi_devintr_off(sd);
	#endif /* BCMSPI_ANDROID */
	sd->lockcount++;
	spin_unlock_irqrestore(&sdos->lock, flags);
	}

	/* Enable client interrupt */
	void
	spi_unlock(sdioh_info_t *sd)
	{
	ulong flags;
	struct sdos_info *sdos;

	sd_trace(("%s: %d, %d\n", __FUNCTION__, sd->lockcount, sd->client_intr_enabled));
	ASSERT(sd->lockcount > 0);

	sdos = (struct sdos_info *)sd->sdos_info;
	ASSERT(sdos);

	spin_lock_irqsave(&sdos->lock, flags);
	if (--sd->lockcount == 0 && sd->client_intr_enabled) {
	#ifdef BCMSPI_ANDROID
	bcmsdh_oob_intr_set(1);
	#else
	spi_devintr_on(sd);
	#endif /* BCMSPI_ANDROID */
	}
	spin_unlock_irqrestore(&sdos->lock, flags);
	}

	#ifndef BCMSPI_ANDROID
	void spi_waitbits(sdioh_info_t *sd, bool yield)
	{
	#ifndef BCMSDYIELD
	ASSERT(!yield);
	#endif // endif
	sd_trace(("%s: yield %d canblock %d\n",
	__FUNCTION__, yield, BLOCKABLE()));

	/* Clear the "interrupt happened" flag and last intrstatus */
	sd->got_hcint = FALSE;

	#ifdef BCMSDYIELD
	if (yield && BLOCKABLE()) {
	struct sdos_info *sdos;
	sdos = (struct sdos_info *)sd->sdos_info;
	/* Wait for the indication, the interrupt will be masked when the ISR fires. */
	wait_event_interruptible(sdos->intr_wait_queue, (sd->got_hcint));
	} else
	#endif /* BCMSDYIELD */
	{
	spi_spinbits(sd);
	}

	}
	#else /* !BCMSPI_ANDROID */
	int bcmgspi_dump = 0; /* Set to dump complete trace of all SPI bus transactions */

	static void
	hexdump(char pfx, unsigned char msg, int msglen)
	{
	int i, col;
	char buf[80];

	ASSERT(strlen(pfx) + 49 <= sizeof(buf));

	col = 0;

	for (i = 0; i < msglen; i++, col++) {
	if (col % 16 == 0)
	strcpy(buf, pfx);
	sprintf(buf + strlen(buf), "%02x", msg[i]);
	if ((col + 1) % 16 == 0)
	printf("%s\n", buf);
	else
	sprintf(buf + strlen(buf), " ");
	}

	if (col % 16 != 0)
	printf("%s\n", buf);
	}

	/* Send/Receive an SPI Packet */
	void
	spi_sendrecv(sdioh_info_t sd, uint8 msg_out, uint8 *msg_in, int msglen)
	{
	int write = 0;
	int tx_len = 0;
	struct spi_message msg;
	struct spi_transfer t[2];

	spi_message_init(&msg);
	memset(t, 0, 2*sizeof(struct spi_transfer));

	if (sd->wordlen == 2)
	#if !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW))
	write = msg_out[2] & 0x80;
	#else
	write = msg_out[1] & 0x80;
	#endif /* !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW)) */
	if (sd->wordlen == 4)
	#if !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW))
	write = msg_out[0] & 0x80;
	#else
	write = msg_out[3] & 0x80;
	#endif /* !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW)) */

	if (bcmgspi_dump) {
	hexdump(" OUT: ", msg_out, msglen);
	}

	tx_len = write ? msglen-4 : 4;

	sd_trace(("spi_sendrecv: %s, wordlen %d, cmd : 0x%02x 0x%02x 0x%02x 0x%02x\n",
	write ? "WR" : "RD", sd->wordlen,
	msg_out[0], msg_out[1], msg_out[2], msg_out[3]));

	t[0].tx_buf = (char *)&msg_out[0];
	t[0].rx_buf = 0;
	t[0].len = tx_len;

	spi_message_add_tail(&t[0], &msg);

	t[1].rx_buf = (char *)&msg_in[tx_len];
	t[1].tx_buf = 0;
	t[1].len = msglen-tx_len;

	spi_message_add_tail(&t[1], &msg);
	spi_sync(gBCMSPI, &msg);

	if (bcmgspi_dump) {
	hexdump(" IN : ", msg_in, msglen);
	}
	}
	#endif /* !BCMSPI_ANDROID */