/*
 * BCMSDH Function Driver for the native SDIO/MMC driver in the Linux Kernel
 *
 * Copyright (C) 2024, 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.
 *
 *
 * <<Broadcom-WL-IPTag/Dual:>>
 */
#include <typedefs.h>

#include <bcmdevs.h>
#include <bcmendian.h>
#include <bcmutils.h>
#include <osl.h>
#include <sdio.h>	/* SDIO Device and Protocol Specs */
#include <sdioh.h>	/* Standard SDIO Host Controller Specification */
#include <bcmsdbus.h>	/* bcmsdh to/from specific controller APIs */
#include <sdiovar.h>	/* ioctl/iovars */

#include <linux/mmc/core.h>
#if (LINUX_VERSION_CODE <= KERNEL_VERSION(3, 0, 8))
#include <drivers/mmc/core/host.h>
#else
#include <linux/mmc/host.h>
#endif /* (LINUX_VERSION_CODE <= KERNEL_VERSION(3, 0, 0)) */
#include <linux/mmc/card.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>

#include <dngl_stats.h>
#include <dhd.h>
#include <dhd_dbg.h>

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)) && defined (CONFIG_PM_SLEEP)
#include <linux/suspend.h>
extern volatile bool dhd_mmc_suspend;
#endif
#include "bcmsdh_sdmmc.h"

#if (LINUX_VERSION_CODE <= KERNEL_VERSION(3, 0, 0)) || \
	(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0))
static inline void
mmc_host_clk_hold(struct mmc_host *host)
{
	BCM_REFERENCE(host);
	return;
}

static inline void
mmc_host_clk_release(struct mmc_host *host)
{
	BCM_REFERENCE(host);
	return;
}

static inline unsigned int
mmc_host_clk_rate(struct mmc_host *host)
{
	return host->ios.clock;
}
#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(3, 0, 0) */

#ifndef BCMSDH_MODULE
extern int sdio_function_init(void);
extern void sdio_function_cleanup(void);
#endif /* BCMSDH_MODULE */

#if !defined(OOB_INTR_ONLY)
static void IRQHandler(struct sdio_func *func);
static void IRQHandlerF2(struct sdio_func *func);
#endif /* !defined(OOB_INTR_ONLY) */
static int sdioh_sdmmc_get_cisaddr(sdioh_info_t *sd, uint32 regaddr);
extern int sdio_reset_comm(struct mmc_card *card);

#define DEFAULT_SDIO_F2_BLKSIZE		512
#ifndef CUSTOM_SDIO_F2_BLKSIZE
#define CUSTOM_SDIO_F2_BLKSIZE		DEFAULT_SDIO_F2_BLKSIZE
#endif

#define DEFAULT_SDIO_F1_BLKSIZE		64
#ifndef CUSTOM_SDIO_F1_BLKSIZE
#define CUSTOM_SDIO_F1_BLKSIZE		DEFAULT_SDIO_F1_BLKSIZE
#endif

#define MAX_IO_RW_EXTENDED_BLK		511

uint sd_sdmode = SDIOH_MODE_SD4;	/* Use SD4 mode by default */
uint sd_f2_blocksize = CUSTOM_SDIO_F2_BLKSIZE;
uint sd_f1_blocksize = CUSTOM_SDIO_F1_BLKSIZE;

#if defined (BT_OVER_SDIO)
uint sd_f3_blocksize = 64;
#endif /* defined (BT_OVER_SDIO) */

uint sd_divisor = 2;			/* Default 48MHz/2 = 24MHz */

uint sd_power = 1;		/* Default to SD Slot powered ON */
uint sd_clock = 1;		/* Default to SD Clock turned ON */
uint sd_hiok = FALSE;	/* Don't use hi-speed mode by default */
uint sd_msglevel = SDH_ERROR_VAL;
uint sd_use_dma = TRUE;

#ifndef CUSTOM_RXCHAIN
#define CUSTOM_RXCHAIN 0
#endif

DHD_PM_RESUME_WAIT_INIT(sdioh_request_byte_wait);
DHD_PM_RESUME_WAIT_INIT(sdioh_request_word_wait);
DHD_PM_RESUME_WAIT_INIT(sdioh_request_packet_wait);
DHD_PM_RESUME_WAIT_INIT(sdioh_request_buffer_wait);

#define DMA_ALIGN_MASK	0x03
#define MMC_SDIO_ABORT_RETRY_LIMIT 5

int sdioh_sdmmc_card_regread(sdioh_info_t *sd, int func, uint32 regaddr, int regsize, uint32 *data);
#ifdef NOT_YET
static int
sdioh_sdmmc_card_regwrite(sdioh_info_t *sd, int func, uint32 regaddr, int regsize, uint32 data);
#endif /* NOT_YET */

#if defined (BT_OVER_SDIO)
extern
void sdioh_sdmmc_card_enable_func_f3(sdioh_info_t *sd, struct sdio_func *func)
{
	sd->func[3] = func;
	sd_info(("%s sd->func[3] %p\n", __FUNCTION__, sd->func[3]));
}
#endif /* defined (BT_OVER_SDIO) */

void  sdmmc_set_clock_rate(sdioh_info_t *sd, uint hz);
uint  sdmmc_get_clock_rate(sdioh_info_t *sd);
void  sdmmc_set_clock_divisor(sdioh_info_t *sd, uint sd_div);

static int
sdioh_sdmmc_card_enablefuncs(sdioh_info_t *sd)
{
	int err_ret;
	uint32 fbraddr;
	uint8 func;

	sd_trace(("%s\n", __FUNCTION__));

	/* Get the Card's common CIS address */
	sd->com_cis_ptr = sdioh_sdmmc_get_cisaddr(sd, SDIOD_CCCR_CISPTR_0);
	sd->func_cis_ptr[0] = sd->com_cis_ptr;
	sd_info(("%s: Card's Common CIS Ptr = 0x%x\n", __FUNCTION__, sd->com_cis_ptr));

	/* Get the Card's function CIS (for each function) */
	for (fbraddr = SDIOD_FBR_STARTADDR, func = 1;
	     func <= sd->num_funcs; func++, fbraddr += SDIOD_FBR_SIZE) {
		sd->func_cis_ptr[func] = sdioh_sdmmc_get_cisaddr(sd, SDIOD_FBR_CISPTR_0 + fbraddr);
		sd_info(("%s: Function %d CIS Ptr = 0x%x\n",
		         __FUNCTION__, func, sd->func_cis_ptr[func]));
	}

	sd->func_cis_ptr[0] = sd->com_cis_ptr;
	sd_info(("%s: Card's Common CIS Ptr = 0x%x\n", __FUNCTION__, sd->com_cis_ptr));

	/* Enable Function 1 */
	sdio_claim_host(sd->func[1]);
	err_ret = sdio_enable_func(sd->func[1]);
	sdio_release_host(sd->func[1]);
	if (err_ret) {
		sd_err(("bcmsdh_sdmmc: Failed to enable F1 Err: 0x%08x", err_ret));
	}

	return FALSE;
}

/*
 *	Public entry points & extern's
 */
extern sdioh_info_t *
sdioh_attach(osl_t *osh, struct sdio_func *func)
{
	sdioh_info_t *sd = NULL;
	int err_ret;

	sd_trace(("%s\n", __FUNCTION__));

	if (func == NULL) {
		sd_err(("%s: sdio function device is NULL\n", __FUNCTION__));
		return NULL;
	}

	if ((sd = (sdioh_info_t *)MALLOC(osh, sizeof(sdioh_info_t))) == NULL) {
		sd_err(("sdioh_attach: out of memory, malloced %d bytes\n", MALLOCED(osh)));
		return NULL;
	}
	bzero((char *)sd, sizeof(sdioh_info_t));
	sd->osh = osh;
	sd->fake_func0.num = 0;
	sd->fake_func0.card = func->card;
	sd->func[0] = &sd->fake_func0;
	sd->func[1] = func->card->sdio_func[0];
	sd->func[2] = func->card->sdio_func[1];

#if defined (BT_OVER_SDIO)
	sd->func[3] = NULL;
#endif /* defined (BT_OVER_SDIO) */

	sd->num_funcs = 2;
	sd->sd_blockmode = TRUE;
	sd->use_client_ints = TRUE;
	sd->client_block_size[0] = 64;
	sd->use_rxchain = CUSTOM_RXCHAIN;
	if (sd->func[1] == NULL || sd->func[2] == NULL) {
		sd_err(("%s: func 1 or 2 is null \n", __FUNCTION__));
		goto fail;
	}
	sdio_set_drvdata(sd->func[1], sd);

	sdio_claim_host(sd->func[1]);
	sd->client_block_size[1] = sd_f1_blocksize;
	err_ret = sdio_set_block_size(sd->func[1], sd_f1_blocksize);
	sdio_release_host(sd->func[1]);
	if (err_ret) {
		sd_err(("bcmsdh_sdmmc: Failed to set F1 blocksize(%d)\n", err_ret));
		goto fail;
	}

	sdio_claim_host(sd->func[2]);
	sd->client_block_size[2] = sd_f2_blocksize;
	err_ret = sdio_set_block_size(sd->func[2], sd_f2_blocksize);
	sdio_release_host(sd->func[2]);
	if (err_ret) {
		sd_err(("bcmsdh_sdmmc: Failed to set F2 blocksize to %d(%d)\n",
			sd_f2_blocksize, err_ret));
		goto fail;
	}

	sd->sd_clk_rate = sdmmc_get_clock_rate(sd);
	sd_print(("%s: sd clock rate = %u\n", __FUNCTION__, sd->sd_clk_rate));
	sdioh_sdmmc_card_enablefuncs(sd);

	sd_trace(("%s: Done\n", __FUNCTION__));
	return sd;

fail:
	MFREE(sd->osh, sd, sizeof(sdioh_info_t));
	return NULL;
}


extern SDIOH_API_RC
sdioh_detach(osl_t *osh, sdioh_info_t *sd)
{
	sd_trace(("%s\n", __FUNCTION__));

	if (sd) {

		/* Disable Function 2 */
		if (sd->func[2]) {
			sdio_claim_host(sd->func[2]);
			sdio_disable_func(sd->func[2]);
			sdio_release_host(sd->func[2]);
		}

		/* Disable Function 1 */
		if (sd->func[1]) {
			sdio_claim_host(sd->func[1]);
			sdio_disable_func(sd->func[1]);
			sdio_release_host(sd->func[1]);
		}

		sd->func[1] = NULL;
		sd->func[2] = NULL;

		MFREE(sd->osh, sd, sizeof(sdioh_info_t));
	}
	return SDIOH_API_RC_SUCCESS;
}

#if defined(OOB_INTR_ONLY) && defined(HW_OOB)

extern SDIOH_API_RC
sdioh_enable_func_intr(sdioh_info_t *sd)
{
	uint8 reg;
	int err;

	if (sd->func[0] == NULL) {
		sd_err(("%s: function 0 pointer is NULL\n", __FUNCTION__));
		return SDIOH_API_RC_FAIL;
	}

	sdio_claim_host(sd->func[0]);
	reg = sdio_readb(sd->func[0], SDIOD_CCCR_INTEN, &err);
	if (err) {
		sd_err(("%s: error for read SDIO_CCCR_IENx : 0x%x\n", __FUNCTION__, err));
		sdio_release_host(sd->func[0]);
		return SDIOH_API_RC_FAIL;
	}
	/* Enable F1 and F2 interrupts, clear master enable */
	reg &= ~INTR_CTL_MASTER_EN;
	reg |= (INTR_CTL_FUNC1_EN | INTR_CTL_FUNC2_EN);
#if defined (BT_OVER_SDIO)
	reg |= (INTR_CTL_FUNC3_EN);
#endif /* defined (BT_OVER_SDIO) */
	sdio_writeb(sd->func[0], reg, SDIOD_CCCR_INTEN, &err);
	sdio_release_host(sd->func[0]);

	if (err) {
		sd_err(("%s: error for write SDIO_CCCR_IENx : 0x%x\n", __FUNCTION__, err));
		return SDIOH_API_RC_FAIL;
	}

	return SDIOH_API_RC_SUCCESS;
}

extern SDIOH_API_RC
sdioh_disable_func_intr(sdioh_info_t *sd)
{
	uint8 reg;
	int err;

	if (sd->func[0] == NULL) {
		sd_err(("%s: function 0 pointer is NULL\n", __FUNCTION__));
		return SDIOH_API_RC_FAIL;
	}

	sdio_claim_host(sd->func[0]);
	reg = sdio_readb(sd->func[0], SDIOD_CCCR_INTEN, &err);
	if (err) {
		sd_err(("%s: error for read SDIO_CCCR_IENx : 0x%x\n", __FUNCTION__, err));
		sdio_release_host(sd->func[0]);
		return SDIOH_API_RC_FAIL;
	}
	reg &= ~(INTR_CTL_FUNC1_EN | INTR_CTL_FUNC2_EN);
#if defined(BT_OVER_SDIO)
	reg &= ~INTR_CTL_FUNC3_EN;
#endif
	/* Disable master interrupt with the last function interrupt */
	if (!(reg & 0xFE))
		reg = 0;
	sdio_writeb(sd->func[0], reg, SDIOD_CCCR_INTEN, &err);
	sdio_release_host(sd->func[0]);

	if (err) {
		sd_err(("%s: error for write SDIO_CCCR_IENx : 0x%x\n", __FUNCTION__, err));
		return SDIOH_API_RC_FAIL;
	}

	return SDIOH_API_RC_SUCCESS;
}
#endif /* defined(OOB_INTR_ONLY) && defined(HW_OOB) */

/* Configure callback to client when we receive client interrupt */
extern SDIOH_API_RC
sdioh_interrupt_register(sdioh_info_t *sd, sdioh_cb_fn_t fn, void *argh)
{
	sd_trace(("%s: Entering\n", __FUNCTION__));
	if (fn == NULL) {
		sd_err(("%s: interrupt handler is NULL, not registering\n", __FUNCTION__));
		return SDIOH_API_RC_FAIL;
	}
#if !defined(OOB_INTR_ONLY)
	sd->intr_handler = fn;
	sd->intr_handler_arg = argh;
	sd->intr_handler_valid = TRUE;

	/* register and unmask irq */
	if (sd->func[2]) {
		sdio_claim_host(sd->func[2]);
		sdio_claim_irq(sd->func[2], IRQHandlerF2);
		sdio_release_host(sd->func[2]);
	}

	if (sd->func[1]) {
		sdio_claim_host(sd->func[1]);
		sdio_claim_irq(sd->func[1], IRQHandler);
		sdio_release_host(sd->func[1]);
	}
#elif defined(HW_OOB)
	sdioh_enable_func_intr(sd);
#endif /* !defined(OOB_INTR_ONLY) */

	return SDIOH_API_RC_SUCCESS;
}

extern SDIOH_API_RC
sdioh_interrupt_deregister(sdioh_info_t *sd)
{
	sd_trace(("%s: Entering\n", __FUNCTION__));

#if !defined(OOB_INTR_ONLY)
	if (sd->func[1]) {
		/* register and unmask irq */
		sdio_claim_host(sd->func[1]);
		sdio_release_irq(sd->func[1]);
		sdio_release_host(sd->func[1]);
	}

	if (sd->func[2]) {
		/* Claim host controller F2 */
		sdio_claim_host(sd->func[2]);
		sdio_release_irq(sd->func[2]);
		/* Release host controller F2 */
		sdio_release_host(sd->func[2]);
	}

	sd->intr_handler_valid = FALSE;
	sd->intr_handler = NULL;
	sd->intr_handler_arg = NULL;
#elif defined(HW_OOB)
	sdioh_disable_func_intr(sd);
#endif /* !defined(OOB_INTR_ONLY) */
	return SDIOH_API_RC_SUCCESS;
}

extern SDIOH_API_RC
sdioh_interrupt_query(sdioh_info_t *sd, bool *onoff)
{
	sd_trace(("%s: Entering\n", __FUNCTION__));
	*onoff = sd->client_intr_enabled;
	return SDIOH_API_RC_SUCCESS;
}

#if defined(DHD_DEBUG) || defined(BCMDBG)
extern bool
sdioh_interrupt_pending(sdioh_info_t *sd)
{
	return (0);
}
#endif

uint
sdioh_query_iofnum(sdioh_info_t *sd)
{
	return sd->num_funcs;
}

/* IOVar table */
enum {
	IOV_MSGLEVEL = 1,
	IOV_BLOCKMODE,
	IOV_BLOCKSIZE,
	IOV_DMA,
	IOV_USEINTS,
	IOV_NUMINTS,
	IOV_NUMLOCALINTS,
	IOV_HOSTREG,
	IOV_DEVREG,
	IOV_DIVISOR,
	IOV_SDMODE,
	IOV_HISPEED,
	IOV_HCIREGS,
	IOV_POWER,
	IOV_CLOCK,
	IOV_RXCHAIN
};

const bcm_iovar_t sdioh_iovars[] = {
	{"sd_msglevel", IOV_MSGLEVEL,	0, 0,	IOVT_UINT32,	0 },
	{"sd_blockmode", IOV_BLOCKMODE, 0, 0,	IOVT_BOOL,	0 },
	{"sd_blocksize", IOV_BLOCKSIZE, 0, 0,	IOVT_UINT32,	0 }, /* ((fn << 16) | size) */
	{"sd_dma",	IOV_DMA,	0, 0,	IOVT_BOOL,	0 },
	{"sd_ints",	IOV_USEINTS,	0, 0,	IOVT_BOOL,	0 },
	{"sd_numints",	IOV_NUMINTS,	0, 0,	IOVT_UINT32,	0 },
	{"sd_numlocalints", IOV_NUMLOCALINTS, 0, 0, IOVT_UINT32,	0 },

#ifdef BCMDBG
	{"sd_hostreg",	IOV_HOSTREG,	0, 0,	IOVT_BUFFER,	sizeof(sdreg_t) },
	{"sd_devreg",	IOV_DEVREG,	0, 0,	IOVT_BUFFER,	sizeof(sdreg_t) },
#endif /* BCMDBG */

	{"sd_divisor",	IOV_DIVISOR,	0, 0,	IOVT_UINT32,	0 },
	{"sd_power",	IOV_POWER,	0, 0,	IOVT_UINT32,	0 },
	{"sd_clock",	IOV_CLOCK,	0, 0,	IOVT_UINT32,	0 },
	{"sd_mode",	IOV_SDMODE,	0, 0,	IOVT_UINT32,	100},
	{"sd_highspeed", IOV_HISPEED,	0, 0,	IOVT_UINT32,	0 },
	{"sd_rxchain",  IOV_RXCHAIN,    0, 0, 	IOVT_BOOL,	0 },
#ifdef BCMDBG
	{"sd_hciregs",	IOV_HCIREGS,	0, 0,	IOVT_BUFFER,	0 },
#endif
	{NULL, 0, 0, 0, 0, 0 }
};

int
sdioh_iovar_op(sdioh_info_t *si, const char *name,
                           void *params, int plen, void *arg, uint len, bool set)
{
	const bcm_iovar_t *vi = NULL;
	int bcmerror = 0;
	uint val_size;
	int32 int_val = 0;
	bool bool_val;
	uint32 actionid;

	ASSERT(name);

	/* Get must have return space; Set does not take qualifiers */
	ASSERT(set || (arg && len));
	ASSERT(!set || (!params && !plen));

	sd_trace(("%s: Enter (%s %s)\n", __FUNCTION__, (set ? "set" : "get"), name));

	if ((vi = bcm_iovar_lookup(sdioh_iovars, name)) == NULL) {
		bcmerror = BCME_UNSUPPORTED;
		goto exit;
	}

	if ((bcmerror = bcm_iovar_lencheck(vi, arg, len, set)) != 0)
		goto exit;

	/* Copied from dhd, copied from wl; certainly overkill here? */
	/* Set up params so get and set can share the convenience variables */
	if (params == NULL) {
		params = arg;
		plen = len;
	}

	if (vi->type == IOVT_VOID)
		val_size = 0;
	else if (vi->type == IOVT_BUFFER)
		val_size = len;
	else
		val_size = sizeof(int);

	if (plen >= (int)sizeof(int_val))
		bcopy(params, &int_val, sizeof(int_val));

	bool_val = (int_val != 0) ? TRUE : FALSE;
	BCM_REFERENCE(bool_val);

	actionid = set ? IOV_SVAL(vi->varid) : IOV_GVAL(vi->varid);
	switch (actionid) {
	case IOV_GVAL(IOV_MSGLEVEL):
		int_val = (int32)sd_msglevel;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_MSGLEVEL):
		sd_msglevel = int_val;
		break;

	case IOV_GVAL(IOV_BLOCKMODE):
		int_val = (int32)si->sd_blockmode;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_BLOCKMODE):
		si->sd_blockmode = (bool)int_val;
		/* Haven't figured out how to make non-block mode with DMA */
		break;

	case IOV_GVAL(IOV_BLOCKSIZE):
		if ((uint32)int_val > si->num_funcs) {
			bcmerror = BCME_BADARG;
			break;
		}
		int_val = (int32)si->client_block_size[int_val];
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_BLOCKSIZE):
	{
		uint func = ((uint32)int_val >> 16);
		uint blksize = (uint16)int_val;
		uint maxsize;

		if (func > si->num_funcs) {
			bcmerror = BCME_BADARG;
			break;
		}

		/* These hardcoded sizes are a hack, remove after proper CIS parsing. */
		switch (func) {
		case 0: maxsize = 32; break;
		case 1: maxsize = BLOCK_SIZE_4318; break;
		case 2: maxsize = BLOCK_SIZE_4328; break;
		default: maxsize = 0;
		}
		if (blksize > maxsize) {
			bcmerror = BCME_BADARG;
			break;
		}
		if (!blksize) {
			blksize = maxsize;
		}

		/* Now set it */
		si->client_block_size[func] = blksize;

#ifdef USE_DYNAMIC_F2_BLKSIZE
		if (si->func[func] == NULL) {
			sd_err(("%s: SDIO Device not present\n", __FUNCTION__));
			bcmerror = BCME_NORESOURCE;
			break;
		}
		sdio_claim_host(si->func[func]);
		bcmerror = sdio_set_block_size(si->func[func], blksize);
		if (bcmerror)
			sd_err(("%s: Failed to set F%d blocksize to %d(%d)\n",
				__FUNCTION__, func, blksize, bcmerror));
		sdio_release_host(si->func[func]);
#endif /* USE_DYNAMIC_F2_BLKSIZE */
		break;
	}

	case IOV_GVAL(IOV_RXCHAIN):
		int_val = (int32)si->use_rxchain;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_GVAL(IOV_DMA):
		int_val = (int32)si->sd_use_dma;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_DMA):
		si->sd_use_dma = (bool)int_val;
		break;

	case IOV_GVAL(IOV_USEINTS):
		int_val = (int32)si->use_client_ints;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_USEINTS):
		si->use_client_ints = (bool)int_val;
		if (si->use_client_ints)
			si->intmask |= CLIENT_INTR;
		else
			si->intmask &= ~CLIENT_INTR;

		break;

	case IOV_GVAL(IOV_DIVISOR):
		int_val = (uint32)sd_divisor;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_DIVISOR):
		/* set the clock to divisor, if value is non-zero & power of 2 */
		if (int_val && !(int_val & (int_val - 1))) {
			sd_divisor = int_val;
			sdmmc_set_clock_divisor(si, sd_divisor);
		} else {
			sd_err(("%s: Invalid sd_divisor value, should be power of 2!\n",
				__FUNCTION__));
		}
		break;

	case IOV_GVAL(IOV_POWER):
		int_val = (uint32)sd_power;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_POWER):
		sd_power = int_val;
		break;

	case IOV_GVAL(IOV_CLOCK):
		int_val = (uint32)sd_clock;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_CLOCK):
		sd_clock = int_val;
		break;

	case IOV_GVAL(IOV_SDMODE):
		int_val = (uint32)sd_sdmode;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_SDMODE):
		sd_sdmode = int_val;
		break;

	case IOV_GVAL(IOV_HISPEED):
		int_val = (uint32)sd_hiok;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_SVAL(IOV_HISPEED):
		sd_hiok = int_val;
		break;

	case IOV_GVAL(IOV_NUMINTS):
		int_val = (int32)si->intrcount;
		bcopy(&int_val, arg, val_size);
		break;

	case IOV_GVAL(IOV_NUMLOCALINTS):
		int_val = (int32)0;
		bcopy(&int_val, arg, val_size);
		break;

#ifdef BCMDBG
	case IOV_GVAL(IOV_HOSTREG):
	{
		/* TODO: Should copy for alignment reasons */
		sdreg_t *sd_ptr = (sdreg_t *)params;

		if (sd_ptr->offset < SD_SysAddr || sd_ptr->offset > SD_MaxCurCap) {
			sd_err(("%s: bad offset 0x%x\n", __FUNCTION__, sd_ptr->offset));
			bcmerror = BCME_BADARG;
			break;
		}

		sd_trace(("%s: rreg%d at offset %d\n", __FUNCTION__,
		                  (sd_ptr->offset & 1) ? 8 : ((sd_ptr->offset & 2) ? 16 : 32),
		                  sd_ptr->offset));
		if (sd_ptr->offset & 1)
			int_val = 8; /* sdioh_sdmmc_rreg8(si, sd_ptr->offset); */
		else if (sd_ptr->offset & 2)
			int_val = 16; /* sdioh_sdmmc_rreg16(si, sd_ptr->offset); */
		else
			int_val = 32; /* sdioh_sdmmc_rreg(si, sd_ptr->offset); */

		bcopy(&int_val, arg, sizeof(int_val));
		break;
	}

	case IOV_SVAL(IOV_HOSTREG):
	{
		/* TODO: Should copy for alignment reasons */
		sdreg_t *sd_ptr = (sdreg_t *)params;

		if (sd_ptr->offset < SD_SysAddr || sd_ptr->offset > SD_MaxCurCap) {
			sd_err(("%s: bad offset 0x%x\n", __FUNCTION__, sd_ptr->offset));
			bcmerror = BCME_BADARG;
			break;
		}

		sd_trace(("%s: wreg%d value 0x%08x at offset %d\n", __FUNCTION__, sd_ptr->value,
		                  (sd_ptr->offset & 1) ? 8 : ((sd_ptr->offset & 2) ? 16 : 32),
		                  sd_ptr->offset));
		break;
	}

	case IOV_GVAL(IOV_DEVREG):
	{
		/* TODO: Should copy for alignment reasons */
		sdreg_t *sd_ptr = (sdreg_t *)params;
		uint8 data = 0;

		if ((uint)sd_ptr->func > si->num_funcs) {
			bcmerror = BCME_BADARG;
			break;
		}

		if (sdioh_cfg_read(si, sd_ptr->func, sd_ptr->offset, &data)) {
			bcmerror = BCME_SDIO_ERROR;
			break;
		}

		int_val = (int)data;
		bcopy(&int_val, arg, sizeof(int_val));
		break;
	}

	case IOV_SVAL(IOV_DEVREG):
	{
		/* TODO: Should copy for alignment reasons */
		sdreg_t *sd_ptr = (sdreg_t *)params;
		uint8 data = (uint8)sd_ptr->value;

		if ((uint)sd_ptr->func > si->num_funcs) {
			bcmerror = BCME_BADARG;
			break;
		}

		if (sdioh_cfg_write(si, sd_ptr->func, sd_ptr->offset, &data)) {
			bcmerror = BCME_SDIO_ERROR;
			break;
		}
		break;
	}
#endif /* BCMDBG */

	default:
		bcmerror = BCME_UNSUPPORTED;
		break;
	}
exit:

	/* Remove protective lock after clients all clean... */
	return bcmerror;
}

#if defined(OOB_INTR_ONLY) && defined(HW_OOB)
/*
 * dhd -i eth0 sd_devreg 0 0xf2 0x3
 */

SDIOH_API_RC
sdioh_enable_hw_oob_intr(sdioh_info_t *sd, bool enable)
{
	SDIOH_API_RC status;
	uint8 data;

	if (enable)
		data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE | SDIO_SEPINT_ACT_HI;
	else
		data = SDIO_SEPINT_ACT_HI;	/* disable hw oob interrupt */

	status = sdioh_request_byte(sd, SDIOH_WRITE, 0, SDIOD_CCCR_BRCM_SEPINT, &data);
	return status;
}
#endif /* defined(OOB_INTR_ONLY) && defined(HW_OOB) */

extern SDIOH_API_RC
sdioh_cfg_read(sdioh_info_t *sd, uint fnc_num, uint32 addr, uint8 *data)
{
	SDIOH_API_RC status;
	/* No lock needed since sdioh_request_byte does locking */
	status = sdioh_request_byte(sd, SDIOH_READ, fnc_num, addr, data);
	return status;
}

extern SDIOH_API_RC
sdioh_cfg_write(sdioh_info_t *sd, uint fnc_num, uint32 addr, uint8 *data)
{
	/* No lock needed since sdioh_request_byte does locking */
	SDIOH_API_RC status;
	status = sdioh_request_byte(sd, SDIOH_WRITE, fnc_num, addr, data);
	return status;
}

static int
sdioh_sdmmc_get_cisaddr(sdioh_info_t *sd, uint32 regaddr)
{
	/* read 24 bits and return valid 17 bit addr */
	int i;
	uint32 scratch, regdata;
	uint8 *ptr = (uint8 *)&scratch;
	for (i = 0; i < 3; i++) {
		if ((sdioh_sdmmc_card_regread (sd, 0, regaddr, 1, &regdata)) != SUCCESS)
			sd_err(("%s: Can't read!\n", __FUNCTION__));

		*ptr++ = (uint8) regdata;
		regaddr++;
	}

	/* Only the lower 17-bits are valid */
	scratch = ltoh32(scratch);
	scratch &= 0x0001FFFF;
	return (scratch);
}

extern SDIOH_API_RC
sdioh_cis_read(sdioh_info_t *sd, uint func, uint8 *cisd, uint32 length)
{
	uint32 count;
	int offset;
	uint32 foo;
	uint8 *cis = cisd;

	sd_trace(("%s: Func = %d\n", __FUNCTION__, func));

	if (!sd->func_cis_ptr[func]) {
		bzero(cis, length);
		sd_err(("%s: no func_cis_ptr[%d]\n", __FUNCTION__, func));
		return SDIOH_API_RC_FAIL;
	}

	sd_print(("%s: func_cis_ptr[%d]=0x%04x\n", __FUNCTION__, func, sd->func_cis_ptr[func]));

	for (count = 0; count < length; count++) {
		offset =  sd->func_cis_ptr[func] + count;
		if (sdioh_sdmmc_card_regread (sd, 0, offset, 1, &foo) < 0) {
			sd_err(("%s: regread failed: Can't read CIS\n", __FUNCTION__));
			return SDIOH_API_RC_FAIL;
		}

		*cis = (uint8)(foo & 0xff);
		cis++;
	}

	return SDIOH_API_RC_SUCCESS;
}

extern SDIOH_API_RC
sdioh_request_byte(sdioh_info_t *sd, uint rw, uint func, uint regaddr, uint8 *byte)
{
	int err_ret = 0;
#if defined(MMC_SDIO_ABORT)
	int sdio_abort_retry = MMC_SDIO_ABORT_RETRY_LIMIT;
#endif

	sd_info(("%s: rw=%d, func=%d, addr=0x%05x\n", __FUNCTION__, rw, func, regaddr));

	DHD_PM_RESUME_WAIT(sdioh_request_byte_wait);
	DHD_PM_RESUME_RETURN_ERROR(SDIOH_API_RC_FAIL);
	if(rw) { /* CMD52 Write */
		if (func == 0) {
			/* Can only directly write to some F0 registers.  Handle F2 enable
			 * as a special case.
			 */
			if (regaddr == SDIOD_CCCR_IOEN) {
#if defined (BT_OVER_SDIO)
				do {
				if (sd->func[3]) {
					sd_info(("bcmsdh_sdmmc F3: *byte 0x%x\n", *byte));

					if (*byte & SDIO_FUNC_ENABLE_3) {
						sdio_claim_host(sd->func[3]);

						/* Set Function 3 Block Size */
						err_ret = sdio_set_block_size(sd->func[3],
						sd_f3_blocksize);
						if (err_ret) {
							sd_err(("F3 blocksize set err%d\n",
								err_ret));
						}

						/* Enable Function 3 */
						sd_info(("bcmsdh_sdmmc F3: enable F3 fn %p\n",
						sd->func[3]));
						err_ret = sdio_enable_func(sd->func[3]);
						if (err_ret) {
							sd_err(("bcmsdh_sdmmc: enable F3 err:%d\n",
								err_ret));
						}

						sdio_release_host(sd->func[3]);

						break;
					} else if (*byte & SDIO_FUNC_DISABLE_3) {
						sdio_claim_host(sd->func[3]);

						/* Disable Function 3 */
						sd_info(("bcmsdh_sdmmc F3: disable F3 fn %p\n",
						sd->func[3]));
						err_ret = sdio_disable_func(sd->func[3]);
						if (err_ret) {
							sd_err(("bcmsdh_sdmmc: Disable F3 err:%d\n",
								err_ret));
						}
						sdio_release_host(sd->func[3]);
						sd->func[3] = NULL;

						break;
					}
				}
#endif /* defined (BT_OVER_SDIO) */
				if (sd->func[2]) {
					sdio_claim_host(sd->func[2]);
					if (*byte & SDIO_FUNC_ENABLE_2) {
						/* Enable Function 2 */
						err_ret = sdio_enable_func(sd->func[2]);
						if (err_ret) {
							sd_err(("bcmsdh_sdmmc: enable F2 failed:%d",
								err_ret));
						}
					} else {
						/* Disable Function 2 */
						err_ret = sdio_disable_func(sd->func[2]);
						if (err_ret) {
							sd_err(("bcmsdh_sdmmc: Disab F2 failed:%d",
								err_ret));
						}
					}
					sdio_release_host(sd->func[2]);
				}
#if defined (BT_OVER_SDIO)
			} while (0);
#endif /* defined (BT_OVER_SDIO) */
		}
#if defined(MMC_SDIO_ABORT)
			/* to allow abort command through F1 */
			else if (regaddr == SDIOD_CCCR_IOABORT) {
				/* Because of SDIO3.0 host issue on Manta,
				 * sometimes the abort fails.
				 * Retrying again will fix this issue.
				 */
				while (sdio_abort_retry--) {
					if (sd->func[func]) {
						sdio_claim_host(sd->func[func]);
						/*
						 * this sdio_f0_writeb() can be replaced with
						 * another api depending upon MMC driver change.
						 * As of this time, this is temporaray one
						 */
						sdio_writeb(sd->func[func],
							*byte, regaddr, &err_ret);
						sdio_release_host(sd->func[func]);
					}
					if (!err_ret)
						break;
				}
			}
#endif /* MMC_SDIO_ABORT */
			else if (regaddr < 0xF0) {
				sd_err(("bcmsdh_sdmmc: F0 Wr:0x%02x: write disallowed\n", regaddr));
			} else {
				/* Claim host controller, perform F0 write, and release */
				if (sd->func[func]) {
					sdio_claim_host(sd->func[func]);
					sdio_f0_writeb(sd->func[func],
						*byte, regaddr, &err_ret);
					sdio_release_host(sd->func[func]);
				}
			}
		} else {
			/* Claim host controller, perform Fn write, and release */
			if (sd->func[func]) {
				sdio_claim_host(sd->func[func]);
				sdio_writeb(sd->func[func], *byte, regaddr, &err_ret);
				sdio_release_host(sd->func[func]);
			}
		}
	} else { /* CMD52 Read */
		/* Claim host controller, perform Fn read, and release */
		if (sd->func[func]) {
			sdio_claim_host(sd->func[func]);
			if (func == 0) {
				*byte = sdio_f0_readb(sd->func[func], regaddr, &err_ret);
			} else {
				*byte = sdio_readb(sd->func[func], regaddr, &err_ret);
			}
			sdio_release_host(sd->func[func]);
		}
	}

	if (err_ret) {
		if ((regaddr == 0x1001F) && ((err_ret == -ETIMEDOUT) || (err_ret == -EILSEQ))) {
			/*	Read/Write to SBSDIO_FUNC1_SLEEPCSR could return -110(timeout)
			 *	or -84(CRC) error in case the host tries to wake the device up.
			 *	Skip error log message if err code is -110 or -84 when accessing
			 *	to SBSDIO_FUNC1_SLEEPCSR to avoid QA misunderstand and DHD shoul
			 *	print error log message if retry count over the MAX_KSO_ATTEMPTS.
			 */
		} else {
			sd_err(("bcmsdh_sdmmc: Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
				rw ? "Write" : "Read", func, regaddr, *byte, err_ret));
		}
	}

	return ((err_ret == 0) ? SDIOH_API_RC_SUCCESS : SDIOH_API_RC_FAIL);
}

extern SDIOH_API_RC
sdioh_request_word(sdioh_info_t *sd, uint cmd_type, uint rw, uint func, uint addr,
                                   uint32 *word, uint nbytes)
{
	int err_ret = SDIOH_API_RC_FAIL;
#if defined(MMC_SDIO_ABORT)
	int sdio_abort_retry = MMC_SDIO_ABORT_RETRY_LIMIT;
#endif

	if (func == 0) {
		sd_err(("%s: Only CMD52 allowed to F0.\n", __FUNCTION__));
		return SDIOH_API_RC_FAIL;
	}

	sd_info(("%s: cmd_type=%d, rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
	         __FUNCTION__, cmd_type, rw, func, addr, nbytes));

	DHD_PM_RESUME_WAIT(sdioh_request_word_wait);
	DHD_PM_RESUME_RETURN_ERROR(SDIOH_API_RC_FAIL);
	/* Claim host controller */
	sdio_claim_host(sd->func[func]);

	if(rw) { /* CMD52 Write */
		if (nbytes == 4) {
			sdio_writel(sd->func[func], *word, addr, &err_ret);
		} else if (nbytes == 2) {
			sdio_writew(sd->func[func], (*word & 0xFFFF), addr, &err_ret);
		} else {
			sd_err(("%s: Invalid nbytes: %d\n", __FUNCTION__, nbytes));
		}
	} else { /* CMD52 Read */
		if (nbytes == 4) {
			*word = sdio_readl(sd->func[func], addr, &err_ret);
		} else if (nbytes == 2) {
			*word = sdio_readw(sd->func[func], addr, &err_ret) & 0xFFFF;
		} else {
			sd_err(("%s: Invalid nbytes: %d\n", __FUNCTION__, nbytes));
		}
	}

	/* Release host controller */
	sdio_release_host(sd->func[func]);

	if (err_ret) {
#if defined(MMC_SDIO_ABORT)
		/* Any error on CMD53 transaction should abort that function using function 0. */
		while (sdio_abort_retry--) {
			if (sd->func[0]) {
				sdio_claim_host(sd->func[0]);
				/*
				 * this sdio_f0_writeb() can be replaced with another api
				 * depending upon MMC driver change.
				 * As of this time, this is temporaray one
				 */
				sdio_writeb(sd->func[0],
					func, SDIOD_CCCR_IOABORT, &err_ret);
				sdio_release_host(sd->func[0]);
			}
			if (!err_ret)
				break;
		}
		if (err_ret)
#endif /* MMC_SDIO_ABORT */
		{
			sd_err(("bcmsdh_sdmmc: Failed to %s word, Err: 0x%08x",
				rw ? "Write" : "Read", err_ret));
		}
	}

	return ((err_ret == 0) ? SDIOH_API_RC_SUCCESS : SDIOH_API_RC_FAIL);
}

#ifdef BCMSDIOH_TXGLOM
static SDIOH_API_RC
sdioh_request_packet_chain(sdioh_info_t *sd, uint fix_inc, uint write, uint func,
                     uint addr, void *pkt)
{
	bool fifo = (fix_inc == SDIOH_DATA_FIX);
	int err_ret = 0;
	void *pnext;
	uint ttl_len, pkt_offset;
	uint blk_num;
	uint blk_size;
	uint max_blk_count;
	uint max_req_size;
	struct mmc_request mmc_req;
	struct mmc_command mmc_cmd;
	struct mmc_data mmc_dat;
	uint32 sg_count;
	struct sdio_func *sdio_func = sd->func[func];
	struct mmc_host *host = sdio_func->card->host;

	sd_trace(("%s: Enter\n", __FUNCTION__));
	ASSERT(pkt);
	DHD_PM_RESUME_WAIT(sdioh_request_packet_wait);
	DHD_PM_RESUME_RETURN_ERROR(SDIOH_API_RC_FAIL);

	blk_size = sd->client_block_size[func];
	max_blk_count = min(host->max_blk_count, (uint)MAX_IO_RW_EXTENDED_BLK);
	max_req_size = min(max_blk_count * blk_size, host->max_req_size);

	pkt_offset = 0;
	pnext = pkt;

	while (pnext != NULL) {
		ttl_len = 0;
		sg_count = 0;
		bzero(&mmc_req, sizeof(struct mmc_request));
		bzero(&mmc_cmd, sizeof(struct mmc_command));
		bzero(&mmc_dat, sizeof(struct mmc_data));
		sg_init_table(sd->sg_list, ARRAYSIZE(sd->sg_list));

		/* Set up scatter-gather DMA descriptors. this loop is to find out the max
		 * data we can transfer with one command 53. blocks per command is limited by
		 * host max_req_size and 9-bit max block number. when the total length of this
		 * packet chain is bigger than max_req_size, use multiple SD_IO_RW_EXTENDED
		 * commands (each transfer is still block aligned)
		 */
		while (pnext != NULL && ttl_len < max_req_size) {
			int pkt_len;
			int sg_data_size;
			uint8 *pdata = (uint8*)PKTDATA(sd->osh, pnext);

			ASSERT(pdata != NULL);
			pkt_len = PKTLEN(sd->osh, pnext);
			sd_trace(("%s[%d] data=%p, len=%d\n", __FUNCTION__, write, pdata, pkt_len));
			/* sg_count is unlikely larger than the array size, and this is
			 * NOT something we can handle here, but in case it happens, PLEASE put
			 * a restriction on max tx/glom count (based on host->max_segs).
			 */
			if (sg_count >= ARRAYSIZE(sd->sg_list)) {
				sd_err(("%s: sg list entries(%u) exceed limit(%u),"
					" sd blk_size=%u\n",
					__FUNCTION__, sg_count, ARRAYSIZE(sd->sg_list),
					blk_size));
				return (SDIOH_API_RC_FAIL);
			}
			pdata += pkt_offset;

			sg_data_size = pkt_len - pkt_offset;
			if (sg_data_size > max_req_size - ttl_len)
				sg_data_size = max_req_size - ttl_len;
			/* some platforms put a restriction on the data size of each scatter-gather
			 * DMA descriptor, use multiple sg buffers when xfer_size is bigger than
			 * max_seg_size
			 */
			if (sg_data_size > host->max_seg_size) {
				sg_data_size = host->max_seg_size;
			}
			sg_set_buf(&sd->sg_list[sg_count++], pdata, sg_data_size);

			ttl_len += sg_data_size;
			pkt_offset += sg_data_size;
			if (pkt_offset == pkt_len) {
				pnext = PKTNEXT(sd->osh, pnext);
				pkt_offset = 0;
			}
		}

		if (ttl_len % blk_size != 0) {
			sd_err(("%s, data length %d not aligned to block size %d\n",
				__FUNCTION__,  ttl_len, blk_size));
			return SDIOH_API_RC_FAIL;
		}
		blk_num = ttl_len / blk_size;
		mmc_dat.sg = sd->sg_list;
		mmc_dat.sg_len = sg_count;
		mmc_dat.blksz = blk_size;
		mmc_dat.blocks = blk_num;
		mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
		mmc_cmd.opcode = 53; /* SD_IO_RW_EXTENDED */
		mmc_cmd.arg = write ? 1<<31 : 0;
		mmc_cmd.arg |= (func & 0x7) << 28;
		mmc_cmd.arg |= 1<<27;
		mmc_cmd.arg |= fifo ? 0 : 1<<26;
		mmc_cmd.arg |= (addr & 0x1FFFF) << 9;
		mmc_cmd.arg |= blk_num & 0x1FF;
		mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
		mmc_req.cmd = &mmc_cmd;
		mmc_req.data = &mmc_dat;
		if (!fifo)
			addr += ttl_len;

		sdio_claim_host(sdio_func);
		mmc_set_data_timeout(&mmc_dat, sdio_func->card);
		mmc_wait_for_req(host, &mmc_req);
		sdio_release_host(sdio_func);

		err_ret = mmc_cmd.error? mmc_cmd.error : mmc_dat.error;
		if (0 != err_ret) {
			sd_err(("%s:CMD53 %s failed with code %d\n",
				__FUNCTION__, write ? "write" : "read", err_ret));
			return SDIOH_API_RC_FAIL;
		}
	}

	sd_trace(("%s: Exit\n", __FUNCTION__));
	return SDIOH_API_RC_SUCCESS;
}
#endif /* BCMSDIOH_TXGLOM */

static SDIOH_API_RC
sdioh_buffer_tofrom_bus(sdioh_info_t *sd, uint fix_inc, uint write, uint func,
                     uint addr, uint8 *buf, uint len)
{
	bool fifo = (fix_inc == SDIOH_DATA_FIX);
	int err_ret = 0;

	sd_trace(("%s: Enter\n", __FUNCTION__));
	ASSERT(buf);

	/* NOTE:
	 * For all writes, each packet length is aligned to 32 (or 4)
	 * bytes in dhdsdio_txpkt_preprocess, and for glom the last packet length
	 * is aligned to block boundary. If you want to align each packet to
	 * a custom size, please do it in dhdsdio_txpkt_preprocess, NOT here
	 *
	 * For reads, the alignment is doen in sdioh_request_buffer.
	 *
	 */
	sdio_claim_host(sd->func[func]);

	if ((write) && (!fifo))
		err_ret = sdio_memcpy_toio(sd->func[func], addr, buf, len);
	else if (write)
		err_ret = sdio_memcpy_toio(sd->func[func], addr, buf, len);
	else if (fifo)
		err_ret = sdio_readsb(sd->func[func], buf, addr, len);
	else
		err_ret = sdio_memcpy_fromio(sd->func[func], buf, addr, len);

	sdio_release_host(sd->func[func]);

	if (err_ret)
		sd_err(("%s: %s FAILED %p, addr=0x%05x, pkt_len=%d, ERR=%d\n", __FUNCTION__,
		       (write) ? "TX" : "RX", buf, addr, len, err_ret));
	else
		sd_trace(("%s: %s xfr'd %p, addr=0x%05x, len=%d\n", __FUNCTION__,
			(write) ? "TX" : "RX", buf, addr, len));

	sd_trace(("%s: Exit\n", __FUNCTION__));
	return ((err_ret == 0) ? SDIOH_API_RC_SUCCESS : SDIOH_API_RC_FAIL);
}


/*
 * This function takes a buffer or packet, and fixes everything up so that in the
 * end, a DMA-able packet is created.
 *
 * A buffer does not have an associated packet pointer, and may or may not be aligned.
 * A packet may consist of a single packet, or a packet chain.  If it is a packet chain,
 * then all the packets in the chain must be properly aligned.  If the packet data is not
 * aligned, then there may only be one packet, and in this case, it is copied to a new
 * aligned packet.
 *
 */
extern SDIOH_API_RC
sdioh_request_buffer(sdioh_info_t *sd, uint pio_dma, uint fix_inc, uint write, uint func,
	uint addr, uint reg_width, uint buf_len, uint8 *buffer, void *pkt)
{
	SDIOH_API_RC status;
	void *tmppkt;
	int is_vmalloc = FALSE;

	sd_trace(("%s: Enter\n", __FUNCTION__));
	DHD_PM_RESUME_WAIT(sdioh_request_buffer_wait);
	DHD_PM_RESUME_RETURN_ERROR(SDIOH_API_RC_FAIL);

	if (pkt) {
#ifdef BCMSDIOH_TXGLOM
		/* packet chain, only used for tx/rx glom, all packets length
		 * are aligned, total length is a block multiple
		 */
		if (PKTNEXT(sd->osh, pkt))
			return sdioh_request_packet_chain(sd, fix_inc, write, func, addr, pkt);
#endif /* BCMSDIOH_TXGLOM */
		/* non-glom mode, ignore the buffer parameter and use the packet pointer
		 * (this shouldn't happen)
		 */
		buffer = PKTDATA(sd->osh, pkt);
		buf_len = PKTLEN(sd->osh, pkt);
	}

	ASSERT(buffer);
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 24)
	is_vmalloc = is_vmalloc_addr(buffer);
#endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 24) */

	/* buffer and length are aligned, use it directly so we can avoid memory copy */
	if ((((ulong)buffer & DMA_ALIGN_MASK) == 0) && ((buf_len & DMA_ALIGN_MASK) == 0) &&
			(!is_vmalloc)) {
		return sdioh_buffer_tofrom_bus(sd, fix_inc, write, func, addr, buffer, buf_len);
	}

	if (is_vmalloc) {
		sd_trace(("%s: Need to memory copy due to virtual memory address.\n",
			__FUNCTION__));
	}

	sd_trace(("%s: [%d] doing memory copy buf=%p, len=%d\n",
		__FUNCTION__, write, buffer, buf_len));

	/* otherwise, a memory copy is needed as the input buffer is not aligned */
	tmppkt = PKTGET_STATIC(sd->osh, buf_len + DEFAULT_SDIO_F2_BLKSIZE, write ? TRUE : FALSE);
	if (tmppkt == NULL) {
		sd_err(("%s: PKTGET failed: len %d\n", __FUNCTION__, buf_len));
		return SDIOH_API_RC_FAIL;
	}

	if (write)
		bcopy(buffer, PKTDATA(sd->osh, tmppkt), buf_len);

	status = sdioh_buffer_tofrom_bus(sd, fix_inc, write, func, addr,
		PKTDATA(sd->osh, tmppkt), ROUNDUP(buf_len, (DMA_ALIGN_MASK+1)));

	if (!write)
		bcopy(PKTDATA(sd->osh, tmppkt), buffer, buf_len);

	PKTFREE_STATIC(sd->osh, tmppkt, write ? TRUE : FALSE);

	return status;
}

/* this function performs "abort" for both of host & device */
extern int
sdioh_abort(sdioh_info_t *sd, uint func)
{
#if defined(MMC_SDIO_ABORT)
	char t_func = (char) func;
#endif /* defined(MMC_SDIO_ABORT) */
	sd_trace(("%s: Enter\n", __FUNCTION__));

	/* Standard Linux SDIO Stack cannot perform an abort. */
#if defined(MMC_SDIO_ABORT)
	/* issue abort cmd52 command through F1 */
	sdioh_request_byte(sd, SD_IO_OP_WRITE, SDIO_FUNC_0, SDIOD_CCCR_IOABORT, &t_func);
#endif /* defined(MMC_SDIO_ABORT) */

	sd_trace(("%s: Exit\n", __FUNCTION__));
	return SDIOH_API_RC_SUCCESS;
}

/* Reset and re-initialize the device */
int sdioh_sdio_reset(sdioh_info_t *si)
{
	sd_trace(("%s: Enter\n", __FUNCTION__));
	sd_trace(("%s: Exit\n", __FUNCTION__));
	return SDIOH_API_RC_SUCCESS;
}

/* Disable device interrupt */
void
sdioh_sdmmc_devintr_off(sdioh_info_t *sd)
{
	sd_trace(("%s: %d\n", __FUNCTION__, sd->use_client_ints));
	sd->intmask &= ~CLIENT_INTR;
}

/* Enable device interrupt */
void
sdioh_sdmmc_devintr_on(sdioh_info_t *sd)
{
	sd_trace(("%s: %d\n", __FUNCTION__, sd->use_client_ints));
	sd->intmask |= CLIENT_INTR;
}

/* Read client card reg */
int
sdioh_sdmmc_card_regread(sdioh_info_t *sd, int func, uint32 regaddr, int regsize, uint32 *data)
{

	if ((func == 0) || (regsize == 1)) {
		uint8 temp = 0;

		sdioh_request_byte(sd, SDIOH_READ, func, regaddr, &temp);
		*data = temp;
		*data &= 0xff;
		sd_data(("%s: byte read data=0x%02x\n",
		         __FUNCTION__, *data));
	} else {
		if (sdioh_request_word(sd, 0, SDIOH_READ, func, regaddr, data, regsize)) {
			return BCME_SDIO_ERROR;
		}
		if (regsize == 2)
			*data &= 0xffff;

		sd_data(("%s: word read data=0x%08x\n",
		         __FUNCTION__, *data));
	}

	return SUCCESS;
}

#if !defined(OOB_INTR_ONLY)
/* bcmsdh_sdmmc interrupt handler */
static void IRQHandler(struct sdio_func *func)
{
	sdioh_info_t *sd;

	sd = sdio_get_drvdata(func);

	ASSERT(sd != NULL);
	sdio_release_host(sd->func[0]);

	if (sd->use_client_ints) {
		sd->intrcount++;
		ASSERT(sd->intr_handler);
		ASSERT(sd->intr_handler_arg);
		(sd->intr_handler)(sd->intr_handler_arg);
	} else {
		/* Do not remove these sd_err messages.  Need to figure
		 * out how to keep interrupts disabled until DHD registers
		 * a handler.
		 */
		sd_err(("bcmsdh_sdmmc: ***IRQHandler\n"));

		sd_err(("%s: Not ready for intr: enabled %d, handler %p\n",
		        __FUNCTION__, sd->client_intr_enabled, sd->intr_handler));
	}

	sdio_claim_host(sd->func[0]);
}

/* bcmsdh_sdmmc interrupt handler for F2 (dummy handler) */
static void IRQHandlerF2(struct sdio_func *func)
{
	sd_trace(("bcmsdh_sdmmc: ***IRQHandlerF2\n"));
}
#endif /* !defined(OOB_INTR_ONLY) */

#ifdef NOTUSED
/* Write client card reg */
static int
sdioh_sdmmc_card_regwrite(sdioh_info_t *sd, int func, uint32 regaddr, int regsize, uint32 data)
{

	if ((func == 0) || (regsize == 1)) {
		uint8 temp;

		temp = data & 0xff;
		sdioh_request_byte(sd, SDIOH_READ, func, regaddr, &temp);
		sd_data(("%s: byte write data=0x%02x\n",
		         __FUNCTION__, data));
	} else {
		if (regsize == 2)
			data &= 0xffff;

		sdioh_request_word(sd, 0, SDIOH_READ, func, regaddr, &data, regsize);

		sd_data(("%s: word write data=0x%08x\n",
		         __FUNCTION__, data));
	}

	return SUCCESS;
}
#endif /* NOTUSED */

int
sdioh_start(sdioh_info_t *sd, int stage)
{

#if defined(OEM_ANDROID)
	int ret;

	if (!sd) {
		sd_err(("%s Failed, sd is NULL\n", __FUNCTION__));
		return (0);
	}

	/* Need to do this stages as we can't enable the interrupt till
		downloading of the firmware is complete, other wise polling
		sdio access will come in way
	*/
	if (sd->func[0]) {
			if (stage == 0) {
		/* Since the power to the chip is killed, we will have
			re enumerate the device again. Set the block size
			and enable the fucntion 1 for in preparation for
			downloading the code
		*/
		/* sdio_reset_comm() - has been fixed in latest kernel/msm.git for Linux
		   2.6.27. The implementation prior to that is buggy, and needs broadcom's
		   patch for it
		*/
		if ((ret = sdio_reset_comm(sd->func[0]->card))) {
			sd_err(("%s Failed, error = %d\n", __FUNCTION__, ret));
			return ret;
		}
		else {
			sd->num_funcs = 2;
			sd->sd_blockmode = TRUE;
			sd->use_client_ints = TRUE;
			sd->client_block_size[0] = 64;

			if (sd->func[1]) {
				/* Claim host controller */
				sdio_claim_host(sd->func[1]);

				sd->client_block_size[1] = 64;
				ret = sdio_set_block_size(sd->func[1], 64);
				if (ret) {
					sd_err(("bcmsdh_sdmmc: Failed to set F1 "
						"blocksize(%d)\n", ret));
				}

				/* Release host controller F1 */
				sdio_release_host(sd->func[1]);
			}

			if (sd->func[2]) {
				/* Claim host controller F2 */
				sdio_claim_host(sd->func[2]);

				sd->client_block_size[2] = sd_f2_blocksize;
				ret = sdio_set_block_size(sd->func[2], sd_f2_blocksize);
				if (ret) {
					sd_err(("bcmsdh_sdmmc: Failed to set F2 "
						"blocksize to %d(%d)\n", sd_f2_blocksize, ret));
				}

				/* Release host controller F2 */
				sdio_release_host(sd->func[2]);
			}

			sdioh_sdmmc_card_enablefuncs(sd);
			}
		} else {
#if !defined(OOB_INTR_ONLY)
			sdio_claim_host(sd->func[0]);
			if (sd->func[2])
				sdio_claim_irq(sd->func[2], IRQHandlerF2);
			if (sd->func[1])
				sdio_claim_irq(sd->func[1], IRQHandler);
			sdio_release_host(sd->func[0]);
#else /* defined(OOB_INTR_ONLY) */
#if defined(HW_OOB)
			sdioh_enable_func_intr(sd);
#endif
			bcmsdh_oob_intr_set(sd->bcmsdh, TRUE);
#endif /* !defined(OOB_INTR_ONLY) */
		}
	}
	else
		sd_err(("%s Failed\n", __FUNCTION__));
#endif /* defined(OEM_ANDROID) */

	return (0);
}

int
sdioh_stop(sdioh_info_t *sd)
{

#if defined(OEM_ANDROID)
	/* MSM7201A Android sdio stack has bug with interrupt
		So internaly within SDIO stack they are polling
		which cause issue when device is turned off. So
		unregister interrupt with SDIO stack to stop the
		polling
	*/
	if (sd->func[0]) {
#if !defined(OOB_INTR_ONLY)
		sdio_claim_host(sd->func[0]);
		if (sd->func[1])
			sdio_release_irq(sd->func[1]);
		if (sd->func[2])
			sdio_release_irq(sd->func[2]);
		sdio_release_host(sd->func[0]);
#else /* defined(OOB_INTR_ONLY) */
#if defined(HW_OOB)
		sdioh_disable_func_intr(sd);
#endif
		bcmsdh_oob_intr_set(sd->bcmsdh, FALSE);
#endif /* !defined(OOB_INTR_ONLY) */
	}
	else
		sd_err(("%s Failed\n", __FUNCTION__));
#endif /* defined(OEM_ANDROID) */

	return (0);
}

int
sdioh_waitlockfree(sdioh_info_t *sd)
{
	return (1);
}

SDIOH_API_RC
sdioh_gpioouten(sdioh_info_t *sd, uint32 gpio)
{
	return SDIOH_API_RC_FAIL;
}

SDIOH_API_RC
sdioh_gpioout(sdioh_info_t *sd, uint32 gpio, bool enab)
{
	return SDIOH_API_RC_FAIL;
}

bool
sdioh_gpioin(sdioh_info_t *sd, uint32 gpio)
{
	return FALSE;
}

SDIOH_API_RC
sdioh_gpio_init(sdioh_info_t *sd)
{
	return SDIOH_API_RC_FAIL;
}

uint
sdmmc_get_clock_rate(sdioh_info_t *sd)
{
	struct sdio_func *sdio_func = sd->func[0];
	struct mmc_host *host = sdio_func->card->host;
	return mmc_host_clk_rate(host);
}


void
sdmmc_set_clock_rate(sdioh_info_t *sd, uint hz)
{
	struct sdio_func *sdio_func = sd->func[0];
	struct mmc_host *host = sdio_func->card->host;
	struct mmc_ios *ios = &host->ios;

	mmc_host_clk_hold(host);
	DHD_INFO(("%s: Before change: sd clock rate is %u\n", __FUNCTION__, ios->clock));
	if (hz < host->f_min) {
		sd_err(("%s: Intended rate is below min rate, setting to min\n", __FUNCTION__));
		hz = host->f_min;
	}

	if (hz > host->f_max) {
		sd_err(("%s: Intended rate exceeds max rate, setting to max\n", __FUNCTION__));
		hz = host->f_max;
	}
	ios->clock = hz;
	host->ops->set_ios(host, ios);
	sd_print(("%s: After change: sd clock rate is %u\n", __FUNCTION__, ios->clock));
	mmc_host_clk_release(host);
}

void
sdmmc_set_clock_divisor(sdioh_info_t *sd, uint sd_div)
{
	uint hz;
	uint old_div = sdmmc_get_clock_rate(sd);
	if (old_div == sd_div) {
		return;
	}

	hz = sd->sd_clk_rate / sd_div;
	sdmmc_set_clock_rate(sd, hz);
}