rt-thread/components/drivers/sdio/sdio.c

/*
 * File      : sdio.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author		Notes
 * 2012-01-13     weety		first version
 */

#include "mmcsd_core.h"
#include "mmcsd_cmd.h"
#include "list.h"

#ifndef RT_SDIO_STACK_SIZE
#define RT_SDIO_STACK_SIZE 512
#endif
#ifndef RT_SDIO_THREAD_PREORITY
#define RT_SDIO_THREAD_PREORITY  0x40
#endif

static rt_list_t sdio_cards;
static rt_list_t sdio_drivers;

struct sdio_card {
	struct rt_mmcsd_card *card;
	rt_list_t  list;
};

struct sdio_driver {
	struct rt_sdio_driver *drv;
	rt_list_t  list;
};

#define MIN(a, b) (a < b ? a : b)

static const rt_uint8_t speed_value[16] =
	{ 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };

static const rt_uint32_t speed_unit[8] =
	{ 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };

rt_int32_t sdio_io_send_op_cond(struct rt_mmcsd_host *host, rt_uint32_t ocr, rt_uint32_t 
*cmd5_resp)
{
	struct rt_mmcsd_cmd cmd;
	rt_int32_t i, err = 0;

	RT_ASSERT(host != RT_NULL);

	rt_memset(&cmd, 0, sizeof(struct rt_mmcsd_cmd));

	cmd.cmd_code = SD_IO_SEND_OP_COND;
	cmd.arg = ocr;
	cmd.flags = RESP_SPI_R4 | RESP_R4 | CMD_BCR;

	for (i = 100; i; i--) 
	{
		err = mmcsd_send_cmd(host, &cmd, 0);
		if (err)
			break;

		/* if we're just probing, do a single pass */
		if (ocr == 0)
			break;

		/* otherwise wait until reset completes */
		if (controller_is_spi(host)) 
		{
			/*
			 * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
			 * an initialized card under SPI, but some cards
			 * (Marvell's) only behave when looking at this
			 * one.
			 */
			if (cmd.resp[1] & CARD_BUSY)
				break;
		} 
		else 
		{
			if (cmd.resp[0] & CARD_BUSY)
				break;
		}

		err = -RT_ETIMEOUT;

		mmcsd_delay_ms(10);
	}

	if (cmd5_resp)
		*cmd5_resp = cmd.resp[controller_is_spi(host) ? 1 : 0];

	return err;
}


rt_int32_t sdio_io_rw_direct(struct rt_mmcsd_card *card, rt_int32_t rw, rt_uint32_t fn,
	rt_uint32_t reg_addr, rt_uint8_t *pdata, rt_uint8_t raw)
{
	struct rt_mmcsd_cmd cmd;
	rt_int32_t err;

	RT_ASSERT(card != RT_NULL);
	RT_ASSERT(fn <= SDIO_MAX_FUNCTIONS);

	if (reg_addr & ~SDIO_ARG_CMD53_REG_MASK)
		return -RT_ERROR;

	rt_memset(&cmd, 0, sizeof(struct rt_mmcsd_cmd));

	cmd.cmd_code = SD_IO_RW_DIRECT;
	cmd.arg = rw ? SDIO_ARG_CMD52_WRITE : SDIO_ARG_CMD52_READ;
	cmd.arg |= fn << SDIO_ARG_CMD52_FUNC_SHIFT;
	cmd.arg |= raw ? SDIO_ARG_CMD52_RAW_FLAG : 0x00000000;
	cmd.arg |= reg_addr << SDIO_ARG_CMD52_REG_SHIFT;
	cmd.arg |= *pdata;
	cmd.flags = RESP_SPI_R5 | RESP_R5 | CMD_AC;

	err = mmcsd_send_cmd(card->host, &cmd, 0);
	if (err)
		return err;

	if (!controller_is_spi(card->host)) 
	{
		if (cmd.resp[0] & R5_ERROR)
			return -RT_EIO;
		if (cmd.resp[0] & R5_FUNCTION_NUMBER)
			return -RT_ERROR;
		if (cmd.resp[0] & R5_OUT_OF_RANGE)
			return -RT_ERROR;
	}

	if (!rw || raw) 
	{
		if (controller_is_spi(card->host))
			*pdata = (cmd.resp[0] >> 8) & 0xFF;
		else
			*pdata = cmd.resp[0] & 0xFF;
	}

	return 0;
}

rt_int32_t sdio_io_rw_extended(struct rt_mmcsd_card *card, rt_int32_t rw, rt_uint32_t fn,
	rt_uint32_t addr, rt_int32_t op_code, rt_uint8_t *buf, rt_uint32_t blocks, rt_uint32_t blksize)
{
	struct rt_mmcsd_req req;
	struct rt_mmcsd_cmd cmd;
	struct rt_mmcsd_data data;

	RT_ASSERT(card != RT_NULL);
	RT_ASSERT(fn <= SDIO_MAX_FUNCTIONS);
	RT_ASSERT(blocks != 1 || blksize <= 512);
	RT_ASSERT(blocks != 0);
	RT_ASSERT(blksize != 0);

	if (addr & ~SDIO_ARG_CMD53_REG_MASK)
		return -RT_ERROR;

	rt_memset(&req, 0, sizeof(struct rt_mmcsd_req));
	rt_memset(&cmd, 0, sizeof(struct rt_mmcsd_cmd));
	rt_memset(&data, 0, sizeof(struct rt_mmcsd_data));

	req.cmd = &cmd;
	req.data = &data;

	cmd.cmd_code = SD_IO_RW_EXTENDED;
	cmd.arg = rw ? SDIO_ARG_CMD53_WRITE : SDIO_ARG_CMD53_READ;
	cmd.arg |= fn << SDIO_ARG_CMD53_FUNC_SHIFT;
	cmd.arg |= op_code ? SDIO_ARG_CMD53_INCREMENT : 0x00000000;
	cmd.arg |= addr << SDIO_ARG_CMD53_REG_SHIFT;
	if (blocks == 1 && blksize <= 512)
		cmd.arg |= (blksize == 512) ? 0 : blksize;      /* byte mode */
	else
		cmd.arg |= SDIO_ARG_CMD53_BLOCK_MODE | blocks;  /* block mode */
	cmd.flags = RESP_SPI_R5 | RESP_R5 | CMD_ADTC;

	data.blksize = blksize;
	data.blks = blocks;
	data.flags = rw ? DATA_DIR_WRITE : DATA_DIR_READ;
	data.buf = (rt_uint32_t *)buf;

	mmcsd_set_data_timeout(&data, card);

	mmcsd_send_request(card->host, &req);

	if (cmd.err)
		return cmd.err;
	if (data.err)
		return data.err;

	if (!controller_is_spi(card->host)) 
	{
		if (cmd.resp[0] & R5_ERROR)
			return -RT_EIO;
		if (cmd.resp[0] & R5_FUNCTION_NUMBER)
			return -RT_ERROR;
		if (cmd.resp[0] & R5_OUT_OF_RANGE)
			return -RT_ERROR;
	}

	return 0;
}

rt_inline rt_uint32_t sdio_max_block_size(struct rt_sdio_function *func)
{
	rt_uint32_t size = MIN(func->card->host->max_seg_size,
			    func->card->host->max_blk_size);
	size = MIN(size, func->max_blk_size);
	return MIN(size, 512u); /* maximum size for byte mode */
}

static rt_int32_t sdio_io_rw_extended_block(struct rt_sdio_function *func, rt_int32_t rw,
	rt_uint32_t addr, rt_int32_t op_code, rt_uint8_t *buf, rt_uint32_t len)
{
	rt_int32_t  ret;
	rt_uint32_t left_size;
	rt_uint32_t max_blks, blks;
	
	left_size = len;

	/* Do the bulk of the transfer using block mode (if supported). */
	if (func->card->cccr.multi_block && (len > sdio_max_block_size(func))) {
		max_blks = MIN(func->card->host->max_blk_count,
			func->card->host->max_seg_size / func->cur_blk_size);
		max_blks = MIN(max_blks, 511u);

		while (left_size > func->cur_blk_size) {

			blks = left_size / func->cur_blk_size;
			if (blks > max_blks)
				blks = max_blks;
			len = blks * func->cur_blk_size;

			ret = sdio_io_rw_extended(func->card, rw, func->num, 
				  addr, op_code, buf, blks, func->cur_blk_size);
			if (ret)
				return ret;

			left_size -= len;
			buf += len;
			if (op_code)
				addr += len;
		}
	}

	while (left_size > 0) {
		len = MIN(left_size, sdio_max_block_size(func));

		ret = sdio_io_rw_extended(func->card, rw, func->num, 
				  addr, op_code, buf, 1, len);
		if (ret)
			return ret;

		left_size -= len;
		buf += len;
		if (op_code)
			addr += len;
	}

	return 0;
}


rt_uint8_t sdio_io_readb(struct rt_sdio_function *func, 
			 rt_uint32_t reg, rt_int32_t *err)
{
	rt_uint8_t data;
	rt_int32_t ret;

 	ret = sdio_io_rw_direct(func->card, 0, func->num, reg, &data, 0);

	if (err)
	{
		*err = ret;
	}

	return data;
}

rt_int32_t sdio_io_writeb(struct rt_sdio_function *func, 
			  rt_uint32_t reg, rt_uint8_t data)
{
 	return sdio_io_rw_direct(func->card, 1, func->num, reg, &data, 0);
}

rt_uint16_t sdio_io_readw(struct rt_sdio_function *func, rt_uint32_t addr, rt_int32_t *err)
{
	rt_int32_t ret;
	rt_uint32_t dmabuf;

	if (err)
		*err = 0;

	ret = sdio_io_rw_extended_block(func, 0, addr, 1, (rt_uint8_t *)&dmabuf, 2);
	if (ret) 
	{
		if (err)
			*err = ret;
	}

	return (rt_uint16_t)dmabuf;
}

rt_int32_t sdio_io_writew(struct rt_sdio_function *func, rt_uint16_t data, rt_uint32_t addr)
{
	rt_uint32_t dmabuf = data;

	return sdio_io_rw_extended_block(func, 1, addr, 1, (rt_uint8_t *)&dmabuf, 2);
}

rt_int32_t sdio_io_read_multi_fifo_1(struct rt_sdio_function *func, 
				     rt_uint32_t addr, rt_uint8_t *buf, rt_uint32_t len)
{
	return sdio_io_rw_extended_block(func, 0, addr, 0, buf, len);
}

rt_int32_t sdio_io_write_multi_fifo_1(struct rt_sdio_function *func, 
				      rt_uint32_t addr, rt_uint8_t *buf, rt_uint32_t len)
{
	return sdio_io_rw_extended_block(func, 1, addr, 0, buf, len);
}



static rt_int32_t sdio_read_cccr(struct rt_mmcsd_card *card)
{
	rt_int32_t ret;
	rt_int32_t cccr_version;
	rt_uint8_t data;

	rt_memset(&card->cccr, 0, sizeof(struct rt_sdio_cccr));

	data = sdio_io_readb(card->sdio_func0, SDIO_REG_CCCR_CCCR_REV, &ret);
	if (ret)
		goto out;

	cccr_version = data & 0x0f;

	if (cccr_version > SDIO_CCCR_REV_1_20) 
	{
		rt_kprintf("unrecognised CCCR structure version %d\n", cccr_version);
		return -RT_ERROR;
	}

	card->cccr.sdio_version = (data & 0xf0) >> 4;

	data = sdio_io_readb(card->sdio_func0, SDIO_REG_CCCR_CARD_CAPS, &ret);
	if (ret)
		goto out;

	if (data & SDIO_CCCR_CAP_SMB)
		card->cccr.multi_block = 1;
	if (data & SDIO_CCCR_CAP_LSC)
		card->cccr.low_speed = 1;
	if (data & SDIO_CCCR_CAP_4BLS)
		card->cccr.wide_bus = 1;

	if (cccr_version >= SDIO_CCCR_REV_1_10) 
	{
		data = sdio_io_readb(card->sdio_func0, SDIO_REG_CCCR_POWER_CTRL, &ret);
		if (ret)
			goto out;

		if (data & SDIO_POWER_SMPC)
			card->cccr.high_power = 1;
	}

	if (cccr_version >= SDIO_CCCR_REV_1_20) 
	{
		data = sdio_io_readb(card->sdio_func0, SDIO_REG_CCCR_SPEED, &ret);
		if (ret)
			goto out;

		if (data & SDIO_SPEED_SHS)
			card->cccr.high_speed = 1;
	}

out:
	return ret;
}

static rt_int32_t cistpl_funce_func0(struct rt_mmcsd_card *card,
			       const rt_uint8_t *buf, rt_uint32_t size)
{
	if (size < 0x04 || buf[0] != 0)
		return -RT_ERROR;

	/* TPLFE_FN0_BLK_SIZE */
	card->cis.func0_blk_size = buf[1] | (buf[2] << 8);

	/* TPLFE_MAX_TRAN_SPEED */
	card->cis.max_tran_speed = speed_value[(buf[3] >> 3) & 15] *
			    speed_unit[buf[3] & 7];

	return 0;
}

static rt_int32_t cistpl_funce_func(struct rt_sdio_function *func,
			     const rt_uint8_t *buf, rt_uint32_t size)
{
	rt_uint32_t version;
	rt_uint32_t min_size;

	version = func->card->cccr.sdio_version;
	min_size = (version == SDIO_SDIO_REV_1_00) ? 28 : 42;

	if (size < min_size || buf[0] != 1)
		return -RT_ERROR;

	/* TPLFE_MAX_BLK_SIZE */
	func->max_blk_size = buf[12] | (buf[13] << 8);

	/* TPLFE_ENABLE_TIMEOUT_VAL, present in ver 1.1 and above */
	if (version > SDIO_SDIO_REV_1_00)
		func->enable_timeout_val = (buf[28] | (buf[29] << 8)) * 10;
	else
		func->enable_timeout_val = 1000; /* 1000ms */

	return 0;
}

static rt_int32_t sdio_read_cis(struct rt_sdio_function *func)
{
	rt_int32_t ret;
	struct rt_sdio_function_tuple *curr, **prev;
	rt_uint32_t i, cisptr = 0;
	rt_uint8_t data;
	rt_uint8_t tpl_code, tpl_link;

	struct rt_mmcsd_card *card = func->card;
	struct rt_sdio_function *func0 = card->sdio_func0;

	RT_ASSERT(func0 != RT_NULL);

	for (i = 0; i < 3; i++)
	{
		data = sdio_io_readb(func, 
			SDIO_REG_FBR_BASE(func->num) + SDIO_REG_FBR_CIS + i, &ret);
		if (ret)
			return ret;
		cisptr |= data << (i * 8);
	}

	prev = &func->tuples;

	do {
		tpl_code = sdio_io_readb(func0, cisptr++, &ret);
		if (ret)
			break;
		tpl_link = sdio_io_readb(func0, cisptr++, &ret);
		if (ret)
			break;

		if ((tpl_code == CISTPL_END) || (tpl_link == 0xff))
			break;

		if (tpl_code == CISTPL_NULL)
			continue;


		curr = rt_malloc(sizeof(struct rt_sdio_function_tuple) + tpl_link);
		if (!curr)
			return -RT_ENOMEM;
		curr->data = (rt_uint8_t *)curr + sizeof(struct rt_sdio_function_tuple);

		for (i = 0; i < tpl_link; i++) 
		{
			curr->data[i] = sdio_io_readb(func0, cisptr + i, &ret);
			if (ret)
				break;
		}
		if (ret) 
		{
			rt_free(curr);
			break;
		}

		switch (tpl_code)
		{
		case CISTPL_MANFID:
			if (tpl_link < 4)
			{
				rt_kprintf("bad CISTPL_MANFID length\n");
				break;
			}
			if (func->num != 0)
			{
				func->manufacturer = curr->data[0];
				func->manufacturer = curr->data[1] << 8;
				func->product = curr->data[2];
				func->product = curr->data[3] << 8;
			}
			else
			{
				card->cis.manufacturer = curr->data[0];
				card->cis.manufacturer = curr->data[1] << 8;
				card->cis.product = curr->data[2];
				card->cis.product = curr->data[3] << 8;
			}
			break;
		case CISTPL_FUNCE:
			if (func->num != 0)
				ret = cistpl_funce_func(func, curr->data, tpl_link);
			else
				ret = cistpl_funce_func0(card, curr->data, tpl_link);

			if (ret)
			{
				rt_kprintf("bad CISTPL_FUNCE size %u "
				       "type %u\n", tpl_link, curr->data[0]);
			}

			break;
		case CISTPL_VERS_1:
			if (tpl_link < 2)
			{
				rt_kprintf("CISTPL_VERS_1 too short\n");
			}
			break;
		default: 
			/* this tuple is unknown to the core */
			curr->next = RT_NULL;
			curr->code = tpl_code;
			curr->size = tpl_link;
			*prev = curr;
			prev = &curr->next;
			rt_kprintf( "CIS tuple code %#x, length %d\n",
			    tpl_code, tpl_link);
			break;
		}

		cisptr += tpl_link;
	} while (1);

	/*
	 * Link in all unknown tuples found in the common CIS so that
	 * drivers don't have to go digging in two places.
	 */
	if (func->num != 0)
		*prev = func0->tuples;

	return ret;
}


void sdio_free_cis(struct rt_sdio_function *func)
{
	struct rt_sdio_function_tuple *tuple, *tmp;
	struct rt_mmcsd_card *card = func->card;

	tuple = func->tuples;

	while (tuple && ((tuple != card->sdio_func0->tuples) || (!func->num))) 
	{
		tmp = tuple;
		tuple = tuple->next;
		rt_free(tmp);
	}

	func->tuples = RT_NULL;
}



static rt_int32_t sdio_read_fbr(struct rt_sdio_function *func)
{
	rt_int32_t ret;
	rt_uint8_t data;

	data = sdio_io_readb(func, 
		SDIO_REG_FBR_BASE(func->num) + SDIO_REG_FBR_STD_FUNC_IF, &ret);
	if (ret)
		goto err;

	data &= 0x0f;

	if (data == 0x0f) 
	{
		data = sdio_io_readb(func, 
			SDIO_REG_FBR_BASE(func->num) + SDIO_REG_FBR_STD_IF_EXT, &ret);
		if (ret)
			goto err;
	}

	func->func_code = data;

err:
	return ret;
}


static rt_int32_t sdio_initialize_function(struct rt_mmcsd_card *card, rt_uint32_t func_num)
{
	rt_int32_t ret;
	struct rt_sdio_function *func;

	RT_ASSERT(func_num <= SDIO_MAX_FUNCTIONS);

	func = rt_malloc(sizeof(struct rt_sdio_function));
	if (!func)
	{
		rt_kprintf("malloc rt_sdio_function failed\n");
		ret = -RT_ENOMEM;
		goto err;
	}
	rt_memset(func, 0, sizeof(struct rt_sdio_function));

	func->num = func_num;

	ret = sdio_read_fbr(func);
	if (ret)
		goto err1;

	ret = sdio_read_cis(func);
	if (ret)
		goto err1;

	card->sdio_function[func_num - 1] = func;

	return 0;

err1:
	sdio_free_cis(func);
	rt_free(func);
	card->sdio_function[func_num - 1] = RT_NULL;
err:
	return ret;
}


static rt_int32_t sdio_set_highspeed(struct rt_mmcsd_card *card)
{
	rt_int32_t ret;
	rt_uint8_t speed;

	if (!(card->host->flags & MMCSD_SUP_HIGHSPEED))
		return 0;

	if (!card->cccr.high_speed)
		return 0;

	speed = sdio_io_readb(card->sdio_func0, SDIO_REG_CCCR_SPEED, &ret);
	if (ret)
		return ret;

	speed |= SDIO_SPEED_EHS;

	ret = sdio_io_writeb(card->sdio_func0, SDIO_REG_CCCR_SPEED, speed);
	if (ret)
		return ret;

	card->flags |= CARD_FLAG_HIGHSPEED;

	return 0;
}

static rt_int32_t sdio_set_bus_wide(struct rt_mmcsd_card *card)
{
	rt_int32_t ret;
	rt_uint8_t busif;

	if (!(card->host->flags & MMCSD_BUSWIDTH_4))
		return 0;

	if (card->cccr.low_speed && !card->cccr.wide_bus)
		return 0;

	busif = sdio_io_readb(card->sdio_func0, SDIO_REG_CCCR_BUS_IF, &ret);
	if (ret)
		return ret;

	busif |= SDIO_BUS_WIDTH_4BIT;

	ret = sdio_io_writeb(card->sdio_func0, SDIO_REG_CCCR_BUS_IF, busif);
	if (ret)
		return ret;

	mmcsd_set_bus_width(card->host, MMCSD_BUS_WIDTH_4);

	return 0;
}


static rt_int32_t sdio_register_card(struct rt_mmcsd_card *card)
{
	struct sdio_card *sc;

	sc = rt_malloc(sizeof(struct sdio_card));
	if (sc == RT_NULL)
	{
		rt_kprintf("malloc sdio card failed\n");
		return -RT_ENOMEM;
	}
	list_insert_after(&sdio_cards, &sc->list);

	return 0;
}


static rt_int32_t sdio_init_card(struct rt_mmcsd_host *host, rt_uint32_t ocr)
{
	rt_int32_t err = 0;
	rt_int32_t i, function_num;
	rt_uint32_t  cmd5_resp;
	struct rt_mmcsd_card *card;

	err = sdio_io_send_op_cond(host, ocr, &cmd5_resp);
	if (err)
		goto err;

	if (controller_is_spi(host)) 
	{
		err = mmcsd_spi_use_crc(host, host->spi_use_crc);
		if (err)
			goto err;
	}

	function_num = (cmd5_resp & 0x70000000) >> 28;

	card = rt_malloc(sizeof(struct rt_mmcsd_card));
	if (!card) 
	{
		rt_kprintf("malloc card failed\n");
		err = -RT_ENOMEM;
		goto err;
	}
	rt_memset(card, 0, sizeof(struct rt_mmcsd_card));

	card->card_type = CARD_TYPE_SDIO;
	card->sdio_function_num = function_num;
	card->host = host;
	host->card = card;

	card->sdio_func0 = rt_malloc(sizeof(struct rt_sdio_function));
	if (!card->sdio_func0)
	{
		rt_kprintf("malloc sdio_func0 failed\n");
		err = -RT_ENOMEM;
		goto err1;
	}
	rt_memset(card->sdio_func0, 0, sizeof(struct rt_sdio_function));
	card->sdio_func0->card = card;
	card->sdio_func0->num = 0;

	if (!controller_is_spi(host)) 
	{
		err = mmcsd_get_card_addr(host, &card->rca);
		if (err)
			goto err2;

		mmcsd_set_bus_mode(host, MMCSD_BUSMODE_PUSHPULL);
	}

	if (!controller_is_spi(host)) 
	{
		err = mmcsd_select_card(card);
		if (err)
			goto err2;
	}

	err = sdio_read_cccr(card);
	if (err)
		goto err2;

	err = sdio_read_cis(card->sdio_func0);
	if (err)
		goto err2;

	err = sdio_set_highspeed(card);
	if (err)
		goto err2;

	if (card->flags & CARD_FLAG_HIGHSPEED) 
	{
		mmcsd_set_clock(host, 50000000);
	} 
	else 
	{
		mmcsd_set_clock(host, card->cis.max_tran_speed);
	}

	err = sdio_set_bus_wide(card);
	if (err)
		goto err2;

	for (i = 0; i < function_num; i++) 
	{
		err = sdio_initialize_function(card, i + 1);
		if (err)
			goto err3;
	}


	/* register sdio card */
	err = sdio_register_card(card);
	if (err)
	{
		goto err3;
	}

	return 0;

err3:
	if (host->card)
	{
		for (i = 0; i < host->card->sdio_function_num; i++)
		{
			if (host->card->sdio_function[i])
			{
				sdio_free_cis(host->card->sdio_function[i]);
				rt_free(host->card->sdio_function[i]);
				host->card->sdio_function[i] = RT_NULL;
				rt_free(host->card);
				host->card = RT_NULL;

			}
		}
	}
err2:
	if (host->card && host->card->sdio_func0)
	{
		sdio_free_cis(host->card->sdio_func0);
		rt_free(host->card->sdio_func0);
		host->card->sdio_func0 = RT_NULL;
	}
err1:
	if (host->card)
	{
		rt_free(host->card);
	}
err:
 	rt_kprintf("error %d while initialising SDIO card\n", err);
	
	return err;
}



rt_int32_t init_sdio(struct rt_mmcsd_host *host, rt_uint32_t ocr)
{
	rt_int32_t err;
	rt_uint32_t  current_ocr;

	RT_ASSERT(host != RT_NULL);

	if (ocr & 0x7F) 
	{
		rt_kprintf("Card ocr below the defined voltage rang.\n");
		ocr &= ~0x7F;
	}

	if (ocr & VDD_165_195) 
	{
		rt_kprintf("Can't support the low voltage SDIO card.\n");
		ocr &= ~VDD_165_195;
	}

	current_ocr = mmcsd_select_voltage(host, ocr);

	if (!current_ocr) 
	{
		err = -RT_ERROR;
		goto err;
	}

	err = sdio_init_card(host, current_ocr);
	if (err)
		goto remove_card;

	return 0;

remove_card:
	rt_free(host->card);
	host->card = RT_NULL;
err:

	rt_kprintf("init SDIO card failed\n");

	return err;

	

}


static void sdio_irq_thread(void *param)
{
	rt_int32_t i, ret;
	rt_uint8_t pending;
	struct rt_mmcsd_card *card;
	struct rt_mmcsd_host *host = (struct rt_mmcsd_host *)param;
	RT_ASSERT(host != RT_NULL);
	card = host->card;
	RT_ASSERT(card != RT_NULL);

	while (1) 
	{
		if (rt_sem_take(host->sdio_irq_sem, RT_WAITING_FOREVER) == RT_EOK)
		{
			mmcsd_host_lock(host);
			pending = sdio_io_readb(host->card->sdio_func0, 
						SDIO_REG_CCCR_INT_PEND, &ret);
			if (ret) 
			{
				mmcsd_dbg("error %d reading SDIO_REG_CCCR_INT_PEND\n", ret);
				goto out;
			}

			for (i = 1; i <= 7; i++) 
			{
				if (pending & (1 << i)) 
				{
					struct rt_sdio_function *func = card->sdio_function[i - 1];
					if (!func) 
					{
						mmcsd_dbg("pending IRQ for "
							"non-existant function %d\n", func->num);
						goto out;
					} 
					else if (func->irq_handler) 
					{
						func->irq_handler(func);
					} 
					else 
					{
						mmcsd_dbg("pending IRQ with no register handler\n");
						goto out;
					}
				}
			}

		out:
			mmcsd_host_unlock(host);
			if (host->flags & MMCSD_SUP_SDIO_IRQ)
				host->ops->enable_sdio_irq(host, 1);
			continue;
		}
	}
}

static rt_int32_t sdio_irq_thread_create(struct rt_mmcsd_card *card)
{
	struct rt_mmcsd_host *host = card->host;

	/* init semaphore and create sdio irq processing thread */
	if (!host->sdio_irq_num)
	{
		host->sdio_irq_num++;
		host->sdio_irq_sem = rt_sem_create("sdio_irq", 0, RT_IPC_FLAG_FIFO);
		RT_ASSERT(host->sdio_irq_sem != RT_NULL);

		host->sdio_irq_thread = rt_thread_create("sdio_irq", sdio_irq_thread, host, 
							 RT_SDIO_STACK_SIZE, RT_SDIO_THREAD_PREORITY, 20);
		if (host->sdio_irq_thread != RT_NULL) 
		{
			rt_thread_startup(host->sdio_irq_thread);
		}
	}

	return 0;
}

static rt_int32_t sdio_irq_thread_delete(struct rt_mmcsd_card *card)
{
	struct rt_mmcsd_host *host = card->host;

	RT_ASSERT(host->sdio_irq_num > 0);

	host->sdio_irq_num--;
	if (!host->sdio_irq_num) 
	{
		if (host->flags & MMCSD_SUP_SDIO_IRQ)
				host->ops->enable_sdio_irq(host, 0);
		rt_sem_delete(host->sdio_irq_sem);
		host->sdio_irq_sem = RT_NULL;
		rt_thread_delete(host->sdio_irq_thread);
		host->sdio_irq_thread = RT_NULL;
	}

	return 0;
}


rt_int32_t sdio_attach_irq(struct rt_sdio_function *func, rt_sdio_irq_handler_t *handler)
{
	rt_int32_t ret;
	rt_uint8_t reg;

	RT_ASSERT(func != RT_NULL);
	RT_ASSERT(func->card != RT_NULL);

	mmcsd_dbg("SDIO: enabling IRQ for function %d\n", func->num);

	if (func->irq_handler) 
	{
		mmcsd_dbg("SDIO: IRQ for already in use.\n");
		return -RT_EBUSY;
	}

	reg = sdio_io_readb(func, SDIO_REG_CCCR_INT_EN, &ret);
	if (ret)
		return ret;

	reg |= 1 << func->num;

	reg |= 1; /* Master interrupt enable */

	ret = sdio_io_writeb(func, SDIO_REG_CCCR_INT_EN, reg);
	if (ret)
		return ret;

	func->irq_handler = handler;

	ret = sdio_irq_thread_create(func->card);
	if (ret)
		func->irq_handler = RT_NULL;

	return ret;
}

rt_int32_t sdio_detach_irq(struct rt_sdio_function *func)
{
	rt_int32_t ret;
	rt_uint8_t reg;

	RT_ASSERT(func != RT_NULL);
	RT_ASSERT(func->card != RT_NULL);

	mmcsd_dbg("SDIO: disabling IRQ for function %d\n", func->num);

	if (func->irq_handler) 
	{
		func->irq_handler = RT_NULL;
		sdio_irq_thread_delete(func->card);
	}

	reg = sdio_io_readb(func, SDIO_REG_CCCR_INT_EN, &ret);
	if (ret)
		return ret;

	reg &= ~(1 << func->num);

	/* Disable master interrupt with the last function interrupt */
	if (!(reg & 0xFE))
		reg = 0;

	ret = sdio_io_writeb(func, SDIO_REG_CCCR_INT_EN, reg);
	if (ret)
		return ret;

	return 0;
}

void sdio_irq_wakeup(struct rt_mmcsd_host *host)
{
	host->ops->enable_sdio_irq(host, 0);
	rt_sem_release(host->sdio_irq_sem);
}


rt_int32_t sdio_enable_func(struct rt_sdio_function *func)
{
	rt_int32_t ret;
	rt_uint8_t reg;
	rt_uint32_t timeout;

	RT_ASSERT(func != RT_NULL);
	RT_ASSERT(func->card != RT_NULL);

	mmcsd_dbg("SDIO: enabling function %d\n", func->num);

	reg = sdio_io_readb(func, SDIO_REG_CCCR_IO_EN, &ret);
	if (ret)
		goto err;

	reg |= 1 << func->num;

	ret = sdio_io_writeb(func, SDIO_REG_CCCR_IO_EN, reg);
	if (ret)
		goto err;

	timeout = rt_tick_get() + func->enable_timeout_val * 1000 / RT_TICK_PER_SECOND;

	while (1) 
	{
		reg = sdio_io_readb(func, SDIO_REG_CCCR_IO_RDY, &ret);
		if (ret)
			goto err;
		if (reg & (1 << func->num))
			break;
		ret = -RT_ETIMEOUT;
		if (rt_tick_get() > timeout)
			goto err;
	}

	mmcsd_dbg("SDIO: enabled function successfull\n");

	return 0;

err:
	mmcsd_dbg("SDIO: failed to enable function %d\n", func->num);
	return ret;
}


rt_int32_t sdio_disable_func(struct rt_sdio_function *func)
{
	rt_int32_t ret;
	rt_uint8_t reg;

	RT_ASSERT(func != RT_NULL);
	RT_ASSERT(func->card != RT_NULL);

	mmcsd_dbg("SDIO: disabling function %d\n", func->num);

	reg =  sdio_io_readb(func, SDIO_REG_CCCR_IO_EN, &ret);
	if (ret)
		goto err;

	reg &= ~(1 << func->num);

	ret = sdio_io_writeb(func, SDIO_REG_CCCR_IO_EN, reg);
	if (ret)
		goto err;

	mmcsd_dbg("SDIO: disabled function successfull\n");

	return 0;

err:
	mmcsd_dbg("SDIO: failed to disable function %d\n", func->num);
	return -RT_EIO;
}

rt_int32_t sdio_set_block_size(struct rt_sdio_function *func, rt_uint32_t blksize)
{
	rt_int32_t ret;

	if (blksize > func->card->host->max_blk_size)
		return -RT_ERROR;

	if (blksize == 0) 
	{
		blksize = MIN(func->max_blk_size, func->card->host->max_blk_size);
		blksize = MIN(blksize, 512u);
	}

	ret = sdio_io_writeb(func, SDIO_REG_FBR_BASE(func->num) + SDIO_REG_FBR_BLKSIZE, 
			     blksize & 0xff);
	if (ret)
		return ret;
	ret = sdio_io_writeb(func, SDIO_REG_FBR_BASE(func->num) + SDIO_REG_FBR_BLKSIZE + 1, 
			     (blksize >> 8) & 0xff);
	if (ret)
		return ret;
	func->cur_blk_size = blksize;

	return 0;
}


rt_inline rt_int32_t sdio_match_function(struct rt_sdio_function *func,
	const struct rt_sdio_device_id *id)
{
	if (id->func_code != SDIO_ANY_FUNC_ID && id->func_code != func->func_code)
		return 0;
	if (id->manufacturer != SDIO_ANY_MAN_ID && id->manufacturer != func->manufacturer)
		return 0;
	if (id->product != SDIO_ANY_PROD_ID && id->product != func->product)
		return 0;

	return 1;
}

static struct rt_sdio_function *sdio_match_driver(struct rt_sdio_device_id *id)
{
	rt_uint32_t fn;
	rt_list_t *l;
	struct sdio_card *sc;
	struct rt_mmcsd_card *card;

	for (l = (&sdio_cards)->next; l != &sdio_cards; l = l->next)
	{
		sc = (struct sdio_card *)list_entry(l, struct sdio_card, list);
		card = sc->card;
		for (fn = 0; fn < card->sdio_function_num; fn++)
		{
			if (sdio_match_function(card->sdio_function[fn], id))
			{
				return card->sdio_function[fn];
			}
		}
	}

	return RT_NULL;
}

rt_int32_t sdio_register_driver(struct rt_sdio_driver *driver)
{
	struct sdio_driver *sd;
	struct rt_sdio_function *func;

	sd = rt_malloc(sizeof(struct sdio_driver));
	if (sd == RT_NULL)
	{
		rt_kprintf("malloc sdio driver failed\n");
		return -RT_ENOMEM;
	}

	list_insert_after(&sdio_drivers, &sd->list);

	if (!list_isempty(&sdio_cards))
	{
		func = sdio_match_driver(driver->id);
		if (func != RT_NULL)
		{
			driver->probe(func);
		}
	}

	return 0;
}

rt_int32_t sdio_unregister_driver(struct rt_sdio_driver *driver)
{
	rt_list_t *l;
	struct sdio_driver *sd = RT_NULL;
	struct rt_sdio_function *func;


	list_insert_after(&sdio_drivers, &sd->list);

	for (l = (&sdio_drivers)->next; l != &sdio_drivers; l = l->next)
	{
		sd = (struct sdio_driver *)list_entry(l, struct sdio_driver, list);
		if (sd->drv != driver)
		{
			sd = RT_NULL;
		}
	}

	if (sd == RT_NULL)
	{
		rt_kprintf("SDIO driver %s not register\n", driver->name);
		return -RT_ERROR;
	}

	if (!list_isempty(&sdio_cards))
	{
		func = sdio_match_driver(driver->id);
		if (func != RT_NULL)
		{
			driver->remove(func);
			list_remove(&sd->list);
			rt_free(sd);
		}
	}

	return 0;
}


void rt_sdio_init(void)
{
	list_init(&sdio_cards);
	list_init(&sdio_drivers);
}