drivers/staging/wilc1000/wilc_sdio.c

/* ////////////////////////////////////////////////////////////////////////// */
/*  */
/* Copyright (c) Atmel Corporation.  All rights reserved. */
/*  */
/* Module Name:  wilc_sdio.c */
/*  */
/*  */
/* //////////////////////////////////////////////////////////////////////////// */

#include "wilc_wlan_if.h"
#include "wilc_wlan.h"

#define WILC_SDIO_BLOCK_SIZE 512

typedef struct {
	void *os_context;
	wilc_wlan_os_func_t os_func;
	uint32_t block_size;
	int (*sdio_cmd52)(sdio_cmd52_t *);
	int (*sdio_cmd53)(sdio_cmd53_t *);
	int (*sdio_set_max_speed)(void);
	int (*sdio_set_default_speed)(void);
	wilc_debug_func dPrint;
	int nint;
#define MAX_NUN_INT_THRPT_ENH2 (5) /* Max num interrupts allowed in registers 0xf7, 0xf8 */
	int has_thrpt_enh3;
} wilc_sdio_t;

static wilc_sdio_t g_sdio;

#ifdef WILC_SDIO_IRQ_GPIO
static int sdio_write_reg(uint32_t addr, uint32_t data);
static int sdio_read_reg(uint32_t addr, uint32_t *data);
#endif
extern unsigned int int_clrd;

/********************************************
 *
 *      Function 0
 *
 ********************************************/

static int sdio_set_func0_csa_address(uint32_t adr)
{
	sdio_cmd52_t cmd;

	/**
	 *      Review: BIG ENDIAN
	 **/
	cmd.read_write = 1;
	cmd.function = 0;
	cmd.raw = 0;
	cmd.address = 0x10c;
	cmd.data = (uint8_t)adr;
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0x10c data...\n");
		goto _fail_;
	}

	cmd.address = 0x10d;
	cmd.data = (uint8_t)(adr >> 8);
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0x10d data...\n");
		goto _fail_;
	}

	cmd.address = 0x10e;
	cmd.data = (uint8_t)(adr >> 16);
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0x10e data...\n");
		goto _fail_;
	}

	return 1;
_fail_:
	return 0;
}

static int sdio_set_func0_csa_address_byte0(uint32_t adr)
{
	sdio_cmd52_t cmd;

	/**
	 *      Review: BIG ENDIAN
	 **/
	cmd.read_write = 1;
	cmd.function = 0;
	cmd.raw = 0;
	cmd.address = 0x10c;
	cmd.data = (uint8_t)adr;
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0x10c data...\n");
		goto _fail_;
	}

	return 1;
_fail_:
	return 0;
}

static int sdio_set_func0_block_size(uint32_t block_size)
{
	sdio_cmd52_t cmd;

	cmd.read_write = 1;
	cmd.function = 0;
	cmd.raw = 0;
	cmd.address = 0x10;
	cmd.data = (uint8_t)block_size;
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0x10 data...\n");
		goto _fail_;
	}

	cmd.address = 0x11;
	cmd.data = (uint8_t)(block_size >> 8);
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0x11 data...\n");
		goto _fail_;
	}

	return 1;
_fail_:
	return 0;
}

/********************************************
 *
 *      Function 1
 *
 ********************************************/

static int sdio_set_func1_block_size(uint32_t block_size)
{
	sdio_cmd52_t cmd;

	cmd.read_write = 1;
	cmd.function = 0;
	cmd.raw = 0;
	cmd.address = 0x110;
	cmd.data = (uint8_t)block_size;
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0x110 data...\n");
		goto _fail_;
	}
	cmd.address = 0x111;
	cmd.data = (uint8_t)(block_size >> 8);
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0x111 data...\n");
		goto _fail_;
	}

	return 1;
_fail_:
	return 0;
}

static int sdio_clear_int(void)
{
#ifndef WILC_SDIO_IRQ_GPIO
	/* uint32_t sts; */
	sdio_cmd52_t cmd;

	cmd.read_write = 0;
	cmd.function = 1;
	cmd.raw = 0;
	cmd.address = 0x4;
	cmd.data = 0;
	g_sdio.sdio_cmd52(&cmd);
	int_clrd++;

	return cmd.data;
#else
	uint32_t reg;

	if (!sdio_read_reg(WILC_HOST_RX_CTRL_0, &reg)) {
		g_sdio.dPrint(N_ERR, "[wilc spi]: Failed read reg (%08x)...\n", WILC_HOST_RX_CTRL_0);
		return 0;
	}
	reg &= ~0x1;
	sdio_write_reg(WILC_HOST_RX_CTRL_0, reg);
	int_clrd++;
	return 1;
#endif

}

uint32_t sdio_xfer_cnt(void)
{
	uint32_t cnt = 0;
	sdio_cmd52_t cmd;

	cmd.read_write = 0;
	cmd.function = 1;
	cmd.raw = 0;
	cmd.address = 0x1C;
	cmd.data = 0;
	g_sdio.sdio_cmd52(&cmd);
	cnt = cmd.data;

	cmd.read_write = 0;
	cmd.function = 1;
	cmd.raw = 0;
	cmd.address = 0x1D;
	cmd.data = 0;
	g_sdio.sdio_cmd52(&cmd);
	cnt |= (cmd.data << 8);

	cmd.read_write = 0;
	cmd.function = 1;
	cmd.raw = 0;
	cmd.address = 0x1E;
	cmd.data = 0;
	g_sdio.sdio_cmd52(&cmd);
	cnt |= (cmd.data << 16);

	return cnt;
}

/********************************************
 *
 *      Sdio interfaces
 *
 ********************************************/
int sdio_check_bs(void)
{
	sdio_cmd52_t cmd;

	/**
	 *      poll until BS is 0
	 **/
	cmd.read_write = 0;
	cmd.function = 0;
	cmd.raw = 0;
	cmd.address = 0xc;
	cmd.data = 0;
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Fail cmd 52, get BS register...\n");
		goto _fail_;
	}

	return 1;

_fail_:

	return 0;
}

static int sdio_write_reg(uint32_t addr, uint32_t data)
{
#ifdef BIG_ENDIAN
	data = BYTE_SWAP(data);
#endif

	if ((addr >= 0xf0) && (addr <= 0xff)) {
		sdio_cmd52_t cmd;

		cmd.read_write = 1;
		cmd.function = 0;
		cmd.raw = 0;
		cmd.address = addr;
		cmd.data = data;
		if (!g_sdio.sdio_cmd52(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd 52, read reg (%08x) ...\n", addr);
			goto _fail_;
		}
	} else {
		sdio_cmd53_t cmd;

		/**
		 *      set the AHB address
		 **/
		if (!sdio_set_func0_csa_address(addr))
			goto _fail_;

		cmd.read_write = 1;
		cmd.function = 0;
		cmd.address = 0x10f;
		cmd.block_mode = 0;
		cmd.increment = 1;
		cmd.count = 4;
		cmd.buffer = (uint8_t *)&data;
		cmd.block_size = g_sdio.block_size; /* johnny : prevent it from setting unexpected value */

		if (!g_sdio.sdio_cmd53(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd53, write reg (%08x)...\n", addr);
			goto _fail_;
		}
	}

	return 1;

_fail_:

	return 0;
}

static int sdio_write(uint32_t addr, uint8_t *buf, uint32_t size)
{
	uint32_t block_size = g_sdio.block_size;
	sdio_cmd53_t cmd;
	int nblk, nleft;

	cmd.read_write = 1;
	if (addr > 0) {
		/**
		 *      has to be word aligned...
		 **/
		if (size & 0x3) {
			size += 4;
			size &= ~0x3;
		}

		/**
		 *      func 0 access
		 **/
		cmd.function = 0;
		cmd.address = 0x10f;
	} else {
		/**
		 *      has to be word aligned...
		 **/
		if (size & 0x3) {
			size += 4;
			size &= ~0x3;
		}

		/**
		 *      func 1 access
		 **/
		cmd.function = 1;
		cmd.address = 0;
	}

	nblk = size / block_size;
	nleft = size % block_size;

	if (nblk > 0) {
		cmd.block_mode = 1;
		cmd.increment = 1;
		cmd.count = nblk;
		cmd.buffer = buf;
		cmd.block_size = block_size;
		if (addr > 0) {
			if (!sdio_set_func0_csa_address(addr))
				goto _fail_;
		}
		if (!g_sdio.sdio_cmd53(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd53 [%x], block send...\n", addr);
			goto _fail_;
		}
		if (addr > 0)
			addr += nblk * block_size;
		buf += nblk * block_size;
	}

	if (nleft > 0) {
		cmd.block_mode = 0;
		cmd.increment = 1;
		cmd.count = nleft;
		cmd.buffer = buf;

		cmd.block_size = block_size; /* johnny : prevent it from setting unexpected value */

		if (addr > 0) {
			if (!sdio_set_func0_csa_address(addr))
				goto _fail_;
		}
		if (!g_sdio.sdio_cmd53(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd53 [%x], bytes send...\n", addr);
			goto _fail_;
		}
	}

	return 1;

_fail_:

	return 0;
}

static int sdio_read_reg(uint32_t addr, uint32_t *data)
{
	if ((addr >= 0xf0) && (addr <= 0xff)) {
		sdio_cmd52_t cmd;

		cmd.read_write = 0;
		cmd.function = 0;
		cmd.raw = 0;
		cmd.address = addr;
		if (!g_sdio.sdio_cmd52(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd 52, read reg (%08x) ...\n", addr);
			goto _fail_;
		}
		*data = cmd.data;
	} else {
		sdio_cmd53_t cmd;

		if (!sdio_set_func0_csa_address(addr))
			goto _fail_;

		cmd.read_write = 0;
		cmd.function = 0;
		cmd.address = 0x10f;
		cmd.block_mode = 0;
		cmd.increment = 1;
		cmd.count = 4;
		cmd.buffer = (uint8_t *)data;

		cmd.block_size = g_sdio.block_size; /* johnny : prevent it from setting unexpected value */

		if (!g_sdio.sdio_cmd53(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd53, read reg (%08x)...\n", addr);
			goto _fail_;
		}
	}

#ifdef BIG_ENDIAN
	*data = BYTE_SWAP(*data);
#endif

	return 1;

_fail_:

	return 0;
}

static int sdio_read(uint32_t addr, uint8_t *buf, uint32_t size)
{
	uint32_t block_size = g_sdio.block_size;
	sdio_cmd53_t cmd;
	int nblk, nleft;

	cmd.read_write = 0;
	if (addr > 0) {
		/**
		 *      has to be word aligned...
		 **/
		if (size & 0x3) {
			size += 4;
			size &= ~0x3;
		}

		/**
		 *      func 0 access
		 **/
		cmd.function = 0;
		cmd.address = 0x10f;
	} else {
		/**
		 *      has to be word aligned...
		 **/
		if (size & 0x3) {
			size += 4;
			size &= ~0x3;
		}

		/**
		 *      func 1 access
		 **/
		cmd.function = 1;
		cmd.address = 0;
	}

	nblk = size / block_size;
	nleft = size % block_size;

	if (nblk > 0) {
		cmd.block_mode = 1;
		cmd.increment = 1;
		cmd.count = nblk;
		cmd.buffer = buf;
		cmd.block_size = block_size;
		if (addr > 0) {
			if (!sdio_set_func0_csa_address(addr))
				goto _fail_;
		}
		if (!g_sdio.sdio_cmd53(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd53 [%x], block read...\n", addr);
			goto _fail_;
		}
		if (addr > 0)
			addr += nblk * block_size;
		buf += nblk * block_size;
	}       /* if (nblk > 0) */

	if (nleft > 0) {
		cmd.block_mode = 0;
		cmd.increment = 1;
		cmd.count = nleft;
		cmd.buffer = buf;

		cmd.block_size = block_size; /* johnny : prevent it from setting unexpected value */

		if (addr > 0) {
			if (!sdio_set_func0_csa_address(addr))
				goto _fail_;
		}
		if (!g_sdio.sdio_cmd53(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd53 [%x], bytes read...\n", addr);
			goto _fail_;
		}
	}

	return 1;

_fail_:

	return 0;
}

/********************************************
 *
 *      Bus interfaces
 *
 ********************************************/

static int sdio_deinit(void *pv)
{
	return 1;
}

static int sdio_sync(void)
{
	uint32_t reg;

	/**
	 *      Disable power sequencer
	 **/
	if (!sdio_read_reg(WILC_MISC, &reg)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed read misc reg...\n");
		return 0;
	}

	reg &= ~(1 << 8);
	if (!sdio_write_reg(WILC_MISC, reg)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed write misc reg...\n");
		return 0;
	}

#ifdef WILC_SDIO_IRQ_GPIO
	{
		uint32_t reg;
		int ret;

		/**
		 *      interrupt pin mux select
		 **/
		ret = sdio_read_reg(WILC_PIN_MUX_0, &reg);
		if (!ret) {
			g_sdio.dPrint(N_ERR, "[wilc spi]: Failed read reg (%08x)...\n", WILC_PIN_MUX_0);
			return 0;
		}
		reg |= (1 << 8);
		ret = sdio_write_reg(WILC_PIN_MUX_0, reg);
		if (!ret) {
			g_sdio.dPrint(N_ERR, "[wilc spi]: Failed write reg (%08x)...\n", WILC_PIN_MUX_0);
			return 0;
		}

		/**
		 *      interrupt enable
		 **/
		ret = sdio_read_reg(WILC_INTR_ENABLE, &reg);
		if (!ret) {
			g_sdio.dPrint(N_ERR, "[wilc spi]: Failed read reg (%08x)...\n", WILC_INTR_ENABLE);
			return 0;
		}
		reg |= (1 << 16);
		ret = sdio_write_reg(WILC_INTR_ENABLE, reg);
		if (!ret) {
			g_sdio.dPrint(N_ERR, "[wilc spi]: Failed write reg (%08x)...\n", WILC_INTR_ENABLE);
			return 0;
		}
	}
#endif

	return 1;
}

static int sdio_init(wilc_wlan_inp_t *inp, wilc_debug_func func)
{
	sdio_cmd52_t cmd;
	int loop;
	uint32_t chipid;

	memset(&g_sdio, 0, sizeof(wilc_sdio_t));

	g_sdio.dPrint = func;
	g_sdio.os_context = inp->os_context.os_private;
	memcpy((void *)&g_sdio.os_func, (void *)&inp->os_func, sizeof(wilc_wlan_os_func_t));

	if (inp->io_func.io_init) {
		if (!inp->io_func.io_init(g_sdio.os_context)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed io init bus...\n");
			return 0;
		}
	} else {
		return 0;
	}

	g_sdio.sdio_cmd52	= inp->io_func.u.sdio.sdio_cmd52;
	g_sdio.sdio_cmd53	= inp->io_func.u.sdio.sdio_cmd53;
	g_sdio.sdio_set_max_speed	= inp->io_func.u.sdio.sdio_set_max_speed;
	g_sdio.sdio_set_default_speed	= inp->io_func.u.sdio.sdio_set_default_speed;

	/**
	 *      function 0 csa enable
	 **/
	cmd.read_write = 1;
	cmd.function = 0;
	cmd.raw = 1;
	cmd.address = 0x100;
	cmd.data = 0x80;
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Fail cmd 52, enable csa...\n");
		goto _fail_;
	}

	/**
	 *      function 0 block size
	 **/
	if (!sdio_set_func0_block_size(WILC_SDIO_BLOCK_SIZE)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Fail cmd 52, set func 0 block size...\n");
		goto _fail_;
	}
	g_sdio.block_size = WILC_SDIO_BLOCK_SIZE;

	/**
	 *      enable func1 IO
	 **/
	cmd.read_write = 1;
	cmd.function = 0;
	cmd.raw = 1;
	cmd.address = 0x2;
	cmd.data = 0x2;
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio] Fail cmd 52, set IOE register...\n");
		goto _fail_;
	}

	/**
	 *      make sure func 1 is up
	 **/
	cmd.read_write = 0;
	cmd.function = 0;
	cmd.raw = 0;
	cmd.address = 0x3;
	loop = 3;
	do {
		cmd.data = 0;
		if (!g_sdio.sdio_cmd52(&cmd)) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Fail cmd 52, get IOR register...\n");
			goto _fail_;
		}
		if (cmd.data == 0x2)
			break;
	} while (loop--);

	if (loop <= 0) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Fail func 1 is not ready...\n");
		goto _fail_;
	}

	/**
	 *      func 1 is ready, set func 1 block size
	 **/
	if (!sdio_set_func1_block_size(WILC_SDIO_BLOCK_SIZE)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Fail set func 1 block size...\n");
		goto _fail_;
	}

	/**
	 *      func 1 interrupt enable
	 **/
	cmd.read_write = 1;
	cmd.function = 0;
	cmd.raw = 1;
	cmd.address = 0x4;
	cmd.data = 0x3;
	if (!g_sdio.sdio_cmd52(&cmd)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Fail cmd 52, set IEN register...\n");
		goto _fail_;
	}

	/**
	 *      make sure can read back chip id correctly
	 **/
	if (!sdio_read_reg(0x1000, &chipid)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Fail cmd read chip id...\n");
		goto _fail_;
	}
	g_sdio.dPrint(N_ERR, "[wilc sdio]: chipid (%08x)\n", chipid);
	if ((chipid & 0xfff) > 0x2a0)
		g_sdio.has_thrpt_enh3 = 1;
	else
		g_sdio.has_thrpt_enh3 = 0;
	g_sdio.dPrint(N_ERR, "[wilc sdio]: has_thrpt_enh3 = %d...\n", g_sdio.has_thrpt_enh3);

	return 1;

_fail_:

	return 0;
}

static void sdio_set_max_speed(void)
{
	g_sdio.sdio_set_max_speed();
}

static void sdio_set_default_speed(void)
{
	g_sdio.sdio_set_default_speed();
}

static int sdio_read_size(uint32_t *size)
{

	uint32_t tmp;
	sdio_cmd52_t cmd;

	/**
	 *      Read DMA count in words
	 **/
	cmd.read_write = 0;
	cmd.function = 0;
	cmd.raw = 0;
	cmd.address = 0xf2;
	cmd.data = 0;
	g_sdio.sdio_cmd52(&cmd);
	tmp = cmd.data;

	/* cmd.read_write = 0; */
	/* cmd.function = 0; */
	/* cmd.raw = 0; */
	cmd.address = 0xf3;
	cmd.data = 0;
	g_sdio.sdio_cmd52(&cmd);
	tmp |= (cmd.data << 8);

	*size = tmp;
	return 1;
}

static int sdio_read_int(uint32_t *int_status)
{

	uint32_t tmp;
	sdio_cmd52_t cmd;

	sdio_read_size(&tmp);

	/**
	 *      Read IRQ flags
	 **/
#ifndef WILC_SDIO_IRQ_GPIO
	/* cmd.read_write = 0; */
	cmd.function = 1;
	/* cmd.raw = 0; */
	cmd.address = 0x04;
	cmd.data = 0;
	g_sdio.sdio_cmd52(&cmd);

	if (cmd.data & (1 << 0))
		tmp |= INT_0;
	if (cmd.data & (1 << 2))
		tmp |= INT_1;
	if (cmd.data & (1 << 3))
		tmp |= INT_2;
	if (cmd.data & (1 << 4))
		tmp |= INT_3;
	if (cmd.data & (1 << 5))
		tmp |= INT_4;
	if (cmd.data & (1 << 6))
		tmp |= INT_5;
	{
		int i;

		for (i = g_sdio.nint; i < MAX_NUM_INT; i++) {
			if ((tmp >> (IRG_FLAGS_OFFSET + i)) & 0x1) {
				g_sdio.dPrint(N_ERR, "[wilc sdio]: Unexpected interrupt (1) : tmp=%x, data=%x\n", tmp, cmd.data);
				break;
			}
		}
	}
#else
	{
		uint32_t irq_flags;

		cmd.read_write = 0;
		cmd.function = 0;
		cmd.raw = 0;
		cmd.address = 0xf7;
		cmd.data = 0;
		g_sdio.sdio_cmd52(&cmd);
		irq_flags = cmd.data & 0x1f;
		tmp |= ((irq_flags >> 0) << IRG_FLAGS_OFFSET);
	}

#endif

	*int_status = tmp;

	return 1;
}

static int sdio_clear_int_ext(uint32_t val)
{
	int ret;

	if (g_sdio.has_thrpt_enh3) {
		uint32_t reg;

#ifdef WILC_SDIO_IRQ_GPIO
		{
			uint32_t flags;

			flags = val & ((1 << MAX_NUN_INT_THRPT_ENH2) - 1);
			reg = flags;
		}
#else
		reg = 0;
#endif
		/* select VMM table 0 */
		if ((val & SEL_VMM_TBL0) == SEL_VMM_TBL0)
			reg |= (1 << 5);
		/* select VMM table 1 */
		if ((val & SEL_VMM_TBL1) == SEL_VMM_TBL1)
			reg |= (1 << 6);
		/* enable VMM */
		if ((val & EN_VMM) == EN_VMM)
			reg |= (1 << 7);
		if (reg) {
			sdio_cmd52_t cmd;

			cmd.read_write = 1;
			cmd.function = 0;
			cmd.raw = 0;
			cmd.address = 0xf8;
			cmd.data = reg;

			ret = g_sdio.sdio_cmd52(&cmd);
			if (!ret) {
				g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0xf8 data (%d) ...\n", __LINE__);
				goto _fail_;
			}

		}
	} else {
#ifdef WILC_SDIO_IRQ_GPIO
		{
			/* see below. has_thrpt_enh2 uses register 0xf8 to clear interrupts. */
			/* Cannot clear multiple interrupts. Must clear each interrupt individually */
			uint32_t flags;

			flags = val & ((1 << MAX_NUM_INT) - 1);
			if (flags) {
				int i;

				ret = 1;
				for (i = 0; i < g_sdio.nint; i++) {
					if (flags & 1) {
						sdio_cmd52_t cmd;

						cmd.read_write = 1;
						cmd.function = 0;
						cmd.raw = 0;
						cmd.address = 0xf8;
						cmd.data = (1 << i);

						ret = g_sdio.sdio_cmd52(&cmd);
						if (!ret) {
							g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0xf8 data (%d) ...\n", __LINE__);
							goto _fail_;
						}

					}
					if (!ret)
						break;
					flags >>= 1;
				}
				if (!ret)
					goto _fail_;
				for (i = g_sdio.nint; i < MAX_NUM_INT; i++) {
					if (flags & 1)
						g_sdio.dPrint(N_ERR, "[wilc sdio]: Unexpected interrupt cleared %d...\n", i);
					flags >>= 1;
				}
			}
		}
#endif /* WILC_SDIO_IRQ_GPIO */

		{
			uint32_t vmm_ctl;

			vmm_ctl = 0;
			/* select VMM table 0 */
			if ((val & SEL_VMM_TBL0) == SEL_VMM_TBL0)
				vmm_ctl |= (1 << 0);
			/* select VMM table 1 */
			if ((val & SEL_VMM_TBL1) == SEL_VMM_TBL1)
				vmm_ctl |= (1 << 1);
			/* enable VMM */
			if ((val & EN_VMM) == EN_VMM)
				vmm_ctl |= (1 << 2);

			if (vmm_ctl) {
				sdio_cmd52_t cmd;

				cmd.read_write = 1;
				cmd.function = 0;
				cmd.raw = 0;
				cmd.address = 0xf6;
				cmd.data = vmm_ctl;
				ret = g_sdio.sdio_cmd52(&cmd);
				if (!ret) {
					g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed cmd52, set 0xf6 data (%d) ...\n", __LINE__);
					goto _fail_;
				}
			}
		}
	}

	return 1;
_fail_:
	return 0;
}

static int sdio_sync_ext(int nint /*  how mant interrupts to enable. */)
{
	uint32_t reg;

	if (nint > MAX_NUM_INT) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Too many interupts (%d)...\n", nint);
		return 0;
	}
	if (nint > MAX_NUN_INT_THRPT_ENH2) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Error: Cannot support more than 5 interrupts when has_thrpt_enh2=1.\n");
		return 0;
	}

	g_sdio.nint = nint;

	/**
	 *      Disable power sequencer
	 **/
	if (!sdio_read_reg(WILC_MISC, &reg)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed read misc reg...\n");
		return 0;
	}

	reg &= ~(1 << 8);
	if (!sdio_write_reg(WILC_MISC, reg)) {
		g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed write misc reg...\n");
		return 0;
	}

#ifdef WILC_SDIO_IRQ_GPIO
	{
		uint32_t reg;
		int ret, i;

		/**
		 *      interrupt pin mux select
		 **/
		ret = sdio_read_reg(WILC_PIN_MUX_0, &reg);
		if (!ret) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed read reg (%08x)...\n", WILC_PIN_MUX_0);
			return 0;
		}
		reg |= (1 << 8);
		ret = sdio_write_reg(WILC_PIN_MUX_0, reg);
		if (!ret) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed write reg (%08x)...\n", WILC_PIN_MUX_0);
			return 0;
		}

		/**
		 *      interrupt enable
		 **/
		ret = sdio_read_reg(WILC_INTR_ENABLE, &reg);
		if (!ret) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed read reg (%08x)...\n", WILC_INTR_ENABLE);
			return 0;
		}

		for (i = 0; (i < 5) && (nint > 0); i++, nint--)
			reg |= (1 << (27 + i));
		ret = sdio_write_reg(WILC_INTR_ENABLE, reg);
		if (!ret) {
			g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed write reg (%08x)...\n", WILC_INTR_ENABLE);
			return 0;
		}
		if (nint) {
			ret = sdio_read_reg(WILC_INTR2_ENABLE, &reg);
			if (!ret) {
				g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed read reg (%08x)...\n", WILC_INTR2_ENABLE);
				return 0;
			}

			for (i = 0; (i < 3) && (nint > 0); i++, nint--)
				reg |= (1 << i);

			ret = sdio_read_reg(WILC_INTR2_ENABLE, &reg);
			if (!ret) {
				g_sdio.dPrint(N_ERR, "[wilc sdio]: Failed write reg (%08x)...\n", WILC_INTR2_ENABLE);
				return 0;
			}
		}
	}
#endif /* WILC_SDIO_IRQ_GPIO */
	return 1;
}

/********************************************
 *
 *      Global sdio HIF function table
 *
 ********************************************/

wilc_hif_func_t hif_sdio = {
	sdio_init,
	sdio_deinit,
	sdio_read_reg,
	sdio_write_reg,
	sdio_read,
	sdio_write,
	sdio_sync,
	sdio_clear_int,
	sdio_read_int,
	sdio_clear_int_ext,
	sdio_read_size,
	sdio_write,
	sdio_read,
	sdio_sync_ext,

	sdio_set_max_speed,
	sdio_set_default_speed,
};