/* Driver for Realtek RTS51xx USB card reader
 *
 * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Author:
 *   wwang (wei_wang@realsil.com.cn)
 *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
 * Maintainer:
 *   Edwin Rong (edwin_rong@realsil.com.cn)
 *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
 */

#include <linux/blkdev.h>
#include <linux/kthread.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>

#include "debug.h"
#include "trace.h"
#include "rts51x.h"
#include "rts51x_transport.h"
#include "rts51x_scsi.h"
#include "rts51x_card.h"
#include "xd.h"

static int xd_build_l2p_tbl(struct rts51x_chip *chip, int zone_no);
static int xd_init_page(struct rts51x_chip *chip, u32 phy_blk, u16 logoff,
			u8 start_page, u8 end_page);

static inline void xd_set_err_code(struct rts51x_chip *chip, u8 err_code)
{
	struct xd_info *xd_card = &(chip->xd_card);

	xd_card->err_code = err_code;
}

static int xd_set_init_para(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int retval;

	if (chip->asic_code)
		xd_card->xd_clock = 47;
	else
		xd_card->xd_clock = CLK_50;

	retval = switch_clock(chip, xd_card->xd_clock);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	return STATUS_SUCCESS;
}

static int xd_switch_clock(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int retval;

	retval = rts51x_select_card(chip, XD_CARD);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval = switch_clock(chip, xd_card->xd_clock);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	return STATUS_SUCCESS;
}

static int xd_read_id(struct rts51x_chip *chip, u8 id_cmd, u8 *id_buf,
		      u8 buf_len)
{
	int retval, i;

	rts51x_init_cmd(chip);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_DAT, 0xFF, id_cmd);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_READ_ID);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER, XD_TRANSFER_END,
		       XD_TRANSFER_END);

	for (i = 0; i < 4; i++) {
		rts51x_add_cmd(chip, READ_REG_CMD, (u16) (XD_ADDRESS1 + i), 0,
			       0);
	}

	retval = rts51x_send_cmd(chip, MODE_CR, 20);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval = rts51x_get_rsp(chip, 5, 20);

	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);
		TRACE_RET(chip, retval);
	}

	if (id_buf && buf_len) {
		if (buf_len > 4)
			buf_len = 4;
		rts51x_read_rsp_buf(chip, 1, id_buf, buf_len);
	}

	return STATUS_SUCCESS;
}

static void xd_assign_phy_addr(struct rts51x_chip *chip, u32 addr, u8 mode)
{
	struct xd_info *xd_card = &(chip->xd_card);

	switch (mode) {
	case XD_RW_ADDR:
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_ADDRESS0, 0xFF, 0);
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_ADDRESS1, 0xFF,
			       (u8) addr);
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_ADDRESS2, 0xFF,
			       (u8) (addr >> 8));
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_ADDRESS3, 0xFF,
			       (u8) (addr >> 16));
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CFG, 0xFF,
			       xd_card->addr_cycle | XD_CALC_ECC |
			       XD_BA_NO_TRANSFORM);
		break;

	case XD_ERASE_ADDR:
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_ADDRESS0, 0xFF,
			       (u8) addr);
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_ADDRESS1, 0xFF,
			       (u8) (addr >> 8));
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_ADDRESS2, 0xFF,
			       (u8) (addr >> 16));
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CFG, 0xFF,
			       (xd_card->addr_cycle - 1) |
			       XD_CALC_ECC | XD_BA_NO_TRANSFORM);
		break;

	default:
		break;
	}
}

static int xd_read_redundant(struct rts51x_chip *chip, u32 page_addr, u8 *buf,
			     int buf_len)
{
	int retval, i;

	rts51x_init_cmd(chip);

	xd_assign_phy_addr(chip, page_addr, XD_RW_ADDR);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_READ_REDUNDANT);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER, XD_TRANSFER_END,
		       XD_TRANSFER_END);

	for (i = 0; i < 6; i++) {
		rts51x_add_cmd(chip, READ_REG_CMD, (u16) (XD_PAGE_STATUS + i),
			       0, 0);
	}
	for (i = 0; i < 4; i++) {
		rts51x_add_cmd(chip, READ_REG_CMD, (u16) (XD_RESERVED0 + i), 0,
			       0);
	}
	rts51x_add_cmd(chip, READ_REG_CMD, XD_PARITY, 0, 0);

	retval = rts51x_send_cmd(chip, MODE_CR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval = rts51x_get_rsp(chip, 11, 500);

	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);
		TRACE_RET(chip, retval);
	}

	if (buf && buf_len) {
		if (buf_len > 11)
			buf_len = 11;
		rts51x_read_rsp_buf(chip, 1, buf, buf_len);
	}

	return STATUS_SUCCESS;
}

static int xd_read_data_from_ppb(struct rts51x_chip *chip, int offset, u8 *buf,
				 int buf_len)
{
	int retval, i;

	if (!buf || (buf_len <= 0))
		TRACE_RET(chip, STATUS_FAIL);

	rts51x_init_cmd(chip);

	for (i = 0; i < buf_len; i++) {
		rts51x_add_cmd(chip, READ_REG_CMD, PPBUF_BASE2 + offset + i, 0,
			       0);
	}

	retval = rts51x_send_cmd(chip, MODE_CR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval = rts51x_get_rsp(chip, buf_len, 200);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	rts51x_read_rsp_buf(chip, 0, buf, buf_len);

	return STATUS_SUCCESS;
}

static int xd_read_cis(struct rts51x_chip *chip, u32 page_addr, u8 *buf,
		       int buf_len)
{
	int retval;
	u8 reg;

	if (!buf || (buf_len < 10))
		TRACE_RET(chip, STATUS_FAIL);

	rts51x_init_cmd(chip);

	xd_assign_phy_addr(chip, page_addr, XD_RW_ADDR);

	rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_DATA_SOURCE, 0x01,
		       PINGPONG_BUFFER);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_CNT, 0xFF, 1);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CHK_DATA_STATUS,
		       XD_AUTO_CHK_DATA_STATUS, XD_AUTO_CHK_DATA_STATUS);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_READ_PAGES);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER,
		       XD_TRANSFER_END | XD_PPB_EMPTY,
		       XD_TRANSFER_END | XD_PPB_EMPTY);

	retval = rts51x_send_cmd(chip, MODE_CR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval = rts51x_get_rsp(chip, 1, 500);
	if (retval == STATUS_TIMEDOUT) {
		rts51x_clear_xd_error(chip);
		TRACE_RET(chip, retval);
	}

	RTS51X_READ_REG(chip, XD_PAGE_STATUS, &reg);
	if (reg != XD_GPG) {
		rts51x_clear_xd_error(chip);
		TRACE_RET(chip, STATUS_FAIL);
	}

	RTS51X_READ_REG(chip, XD_CTL, &reg);

	if (!(reg & XD_ECC1_ERROR) || !(reg & XD_ECC1_UNCORRECTABLE)) {
		retval = xd_read_data_from_ppb(chip, 0, buf, buf_len);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);
		if (reg & XD_ECC1_ERROR) {	/* correctable error */
			u8 ecc_bit, ecc_byte;

			RTS51X_READ_REG(chip, XD_ECC_BIT1, &ecc_bit);
			RTS51X_READ_REG(chip, XD_ECC_BYTE1, &ecc_byte);

			RTS51X_DEBUGP("ECC_BIT1 = 0x%x, ECC_BYTE1 = 0x%x\n",
				       ecc_bit, ecc_byte);
			if (ecc_byte < buf_len) {
				RTS51X_DEBUGP("Before correct: 0x%x\n",
					       buf[ecc_byte]);
				buf[ecc_byte] ^= (1 << ecc_bit);
				RTS51X_DEBUGP("After correct: 0x%x\n",
					       buf[ecc_byte]);
			}
		}
	} else if (!(reg & XD_ECC2_ERROR) || !(reg & XD_ECC2_UNCORRECTABLE)) {
		RTS51X_WRITE_REG(chip, CARD_STOP, XD_STOP | XD_CLR_ERR,
				 XD_STOP | XD_CLR_ERR);

		retval = xd_read_data_from_ppb(chip, 256, buf, buf_len);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);
		if (reg & XD_ECC2_ERROR) {
			u8 ecc_bit, ecc_byte;

			RTS51X_READ_REG(chip, XD_ECC_BIT2, &ecc_bit);
			RTS51X_READ_REG(chip, XD_ECC_BYTE2, &ecc_byte);

			RTS51X_DEBUGP("ECC_BIT2 = 0x%x, ECC_BYTE2 = 0x%x\n",
				       ecc_bit, ecc_byte);
			if (ecc_byte < buf_len) {
				RTS51X_DEBUGP("Before correct: 0x%x\n",
					       buf[ecc_byte]);
				buf[ecc_byte] ^= (1 << ecc_bit);
				RTS51X_DEBUGP("After correct: 0x%x\n",
					       buf[ecc_byte]);
			}
		}
	} else {
		rts51x_clear_xd_error(chip);
		TRACE_RET(chip, STATUS_FAIL);
	}

	return STATUS_SUCCESS;
}

static void xd_pull_ctl_disable(struct rts51x_chip *chip)
{
	if (CHECK_PKG(chip, LQFP48)) {
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
	} else {
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
	}
}

static void xd_pull_ctl_enable(struct rts51x_chip *chip)
{
	if (CHECK_PKG(chip, LQFP48)) {
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
	} else {
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x59);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
	}
}

static int reset_xd(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int retval, i, j;
	u8 id_buf[4], redunt[11];

	retval = rts51x_select_card(chip, XD_CARD);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, STATUS_FAIL);

	rts51x_init_cmd(chip);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CHK_DATA_STATUS, 0xFF,
		       XD_PGSTS_NOT_FF);
	if (chip->asic_code)
		xd_pull_ctl_disable(chip);
	else
		rts51x_add_cmd(chip, WRITE_REG_CMD, FPGA_PULL_CTL, 0xFF,
			       (FPGA_XD_PULL_CTL_EN1 & FPGA_XD_PULL_CTL_EN3));

	if (!chip->option.FT2_fast_mode) {
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_INIT, XD_NO_AUTO_PWR_OFF,
			       0);
		if (CHECK_PKG(chip, LQFP48) ||
				chip->option.rts5129_D3318_off_enable) {
			rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PWR_CTL,
				       DV3318_AUTO_PWR_OFF,
				       DV3318_AUTO_PWR_OFF);
		}
	}
	rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_OE, XD_OUTPUT_EN, 0);
	if (!chip->option.FT2_fast_mode) {
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PWR_CTL, POWER_MASK,
			       POWER_OFF);
	}

	retval = rts51x_send_cmd(chip, MODE_C, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);
	if (!chip->option.FT2_fast_mode) {
#ifdef SD_XD_IO_FOLLOW_PWR
		if (CHECK_PKG(chip, LQFP48)
		    || chip->option.rts5129_D3318_off_enable) {
			rts51x_write_register(chip, CARD_PWR_CTL,
					LDO_OFF, LDO_OFF);
		}
#endif

		wait_timeout(250);

#ifdef SD_XD_IO_FOLLOW_PWR
		if (CHECK_PKG(chip, LQFP48)
		    || chip->option.rts5129_D3318_off_enable) {
			rts51x_init_cmd(chip);
			if (chip->asic_code) {
				xd_pull_ctl_enable(chip);
			} else {
				rts51x_add_cmd(chip, WRITE_REG_CMD,
					FPGA_PULL_CTL, 0xFF,
					(FPGA_XD_PULL_CTL_EN1 &
						FPGA_XD_PULL_CTL_EN2));
			}
			retval = rts51x_send_cmd(chip, MODE_C, 100);
			if (retval != STATUS_SUCCESS)
				TRACE_RET(chip, STATUS_FAIL);
		}
#endif

		retval = rts51x_card_power_on(chip, XD_CARD);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);
#ifdef SUPPORT_OCP
		wait_timeout(50);
		rts51x_get_card_status(chip, &(chip->card_status));
		chip->ocp_stat = (chip->card_status >> 4) & 0x03;

		if (chip->ocp_stat & (MS_OCP_NOW | MS_OCP_EVER)) {
			RTS51X_DEBUGP("Over current, OCPSTAT is 0x%x\n",
				       chip->ocp_stat);
			TRACE_RET(chip, STATUS_FAIL);
		}
#endif
	}

	rts51x_init_cmd(chip);

	if (chip->asic_code)
		xd_pull_ctl_enable(chip);
	else
		rts51x_add_cmd(chip, WRITE_REG_CMD, FPGA_PULL_CTL, 0xFF,
			       (FPGA_XD_PULL_CTL_EN1 & FPGA_XD_PULL_CTL_EN2));
	rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_OE, XD_OUTPUT_EN,
		       XD_OUTPUT_EN);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CTL, XD_CE_DISEN, XD_CE_DISEN);

	retval = rts51x_send_cmd(chip, MODE_C, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, STATUS_FAIL);

	if (!chip->option.FT2_fast_mode)
		wait_timeout(200);

	retval = xd_set_init_para(chip);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, STATUS_FAIL);
	/* Read ID to check if the timing setting is right */
	for (i = 0; i < 4; i++) {
		u8 xd_dat, xd_ctl;

		if (monitor_card_cd(chip, XD_CARD) == CD_NOT_EXIST)
			TRACE_RET(chip, STATUS_FAIL);

		rts51x_init_cmd(chip);
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_DTCTL, 0xFF,
			XD_TIME_SETUP_STEP * 3 + XD_TIME_RW_STEP *
			(2 + i + chip->option.rts51x_xd_rw_step)
			+ XD_TIME_RWN_STEP *
			(i + chip->option.rts51x_xd_rwn_step));
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CATCTL, 0xFF,
			XD_TIME_SETUP_STEP * 3 + XD_TIME_RW_STEP * (4 +
			i) + XD_TIME_RWN_STEP * (3 + i));

		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
			       XD_TRANSFER_START | XD_RESET);
		rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER,
			       XD_TRANSFER_END, XD_TRANSFER_END);

		rts51x_add_cmd(chip, READ_REG_CMD, XD_DAT, 0, 0);
		rts51x_add_cmd(chip, READ_REG_CMD, XD_CTL, 0, 0);

		retval = rts51x_send_cmd(chip, MODE_CR, 100);
		if (retval != STATUS_SUCCESS) {
			rts51x_clear_xd_error(chip);
			TRACE_RET(chip, retval);
		}

		retval = rts51x_get_rsp(chip, 3, 100);
		if (retval != STATUS_SUCCESS) {
			rts51x_clear_xd_error(chip);
			TRACE_RET(chip, retval);
		}

		xd_dat = chip->rsp_buf[1];
		xd_ctl = chip->rsp_buf[2];
		RTS51X_DEBUGP("XD_DAT: 0x%x, XD_CTL: 0x%x\n", xd_dat, xd_ctl);

		if (((xd_dat & READY_FLAG) != READY_STATE)
		    || !(xd_ctl & XD_RDY))
			continue;

		retval = xd_read_id(chip, READ_ID, id_buf, 4);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);

		RTS51X_DEBUGP("READ_ID: 0x%x 0x%x 0x%x 0x%x\n",
			       id_buf[0], id_buf[1], id_buf[2], id_buf[3]);

		xd_card->device_code = id_buf[1];

		switch (xd_card->device_code) {
		case XD_4M_X8_512_1:
		case XD_4M_X8_512_2:
			xd_card->block_shift = 4;	/* 16 pages per block */
			xd_card->page_off = 0x0F;
			xd_card->addr_cycle = 3;
			xd_card->zone_cnt = 1;
			xd_card->capacity = 8000;	/* 500 * 2 ^ 4 */
			XD_SET_4MB(xd_card);
			break;
		case XD_8M_X8_512:
			xd_card->block_shift = 4;
			xd_card->page_off = 0x0F;
			xd_card->addr_cycle = 3;
			xd_card->zone_cnt = 1;
			xd_card->capacity = 16000;	/* 1000 * 2 ^ 4 */
			break;
		case XD_16M_X8_512:
			XD_PAGE_512(xd_card);	/* 32 pages per block */
			xd_card->addr_cycle = 3;
			xd_card->zone_cnt = 1;
			xd_card->capacity = 32000;	/* 1000 * 2 ^ 5 */
			break;
		case XD_32M_X8_512:
			XD_PAGE_512(xd_card);
			xd_card->addr_cycle = 3;
			xd_card->zone_cnt = 2;
			xd_card->capacity = 64000;	/* 2000 * 2 ^ 5 */
			break;
		case XD_64M_X8_512:
			XD_PAGE_512(xd_card);
			xd_card->addr_cycle = 4;
			xd_card->zone_cnt = 4;
			xd_card->capacity = 128000;	/* 4000 * 2 ^ 5 */
			break;
		case XD_128M_X8_512:
			XD_PAGE_512(xd_card);
			xd_card->addr_cycle = 4;
			xd_card->zone_cnt = 8;
			xd_card->capacity = 256000;	/* 8000 * 2 ^ 5 */
			break;
		case XD_256M_X8_512:
			XD_PAGE_512(xd_card);
			xd_card->addr_cycle = 4;
			xd_card->zone_cnt = 16;
			xd_card->capacity = 512000;	/* 16000 * 2 ^ 5 */
			break;
		case XD_512M_X8:
			XD_PAGE_512(xd_card);
			xd_card->addr_cycle = 4;
			xd_card->zone_cnt = 32;
			xd_card->capacity = 1024000;	/* 32000 * 2 ^ 5 */
			break;
		case xD_1G_X8_512:
			XD_PAGE_512(xd_card);
			xd_card->addr_cycle = 4;
			xd_card->zone_cnt = 64;
			xd_card->capacity = 2048000;	/* 64000 * 2 ^ 5 */
			break;
		case xD_2G_X8_512:
			XD_PAGE_512(xd_card);
			xd_card->addr_cycle = 4;
			xd_card->zone_cnt = 128;
			xd_card->capacity = 4096000;	/* 128000 * 2 ^ 5 */
			break;
		default:
			continue;
		}

		/* Confirm timing setting */
		for (j = 0; j < 10; j++) {
			retval = xd_read_id(chip, READ_ID, id_buf, 4);
			if (retval != STATUS_SUCCESS)
				TRACE_RET(chip, retval);

			if (id_buf[1] != xd_card->device_code)
				break;
		}

		/* Current timing pass */
		if (j == 10)
			break;
	}

	if (i == 4) {
		xd_card->block_shift = 0;
		xd_card->page_off = 0;
		xd_card->addr_cycle = 0;
		xd_card->capacity = 0;

		TRACE_RET(chip, STATUS_FAIL);
	}

	retval = xd_read_id(chip, READ_xD_ID, id_buf, 4);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);
	RTS51X_DEBUGP("READ_xD_ID: 0x%x 0x%x 0x%x 0x%x\n",
		       id_buf[0], id_buf[1], id_buf[2], id_buf[3]);
	if (id_buf[2] != XD_ID_CODE)
		TRACE_RET(chip, STATUS_FAIL);

	/* Search CIS block */
	for (i = 0; i < 24; i++) {
		u32 page_addr;

		if (monitor_card_cd(chip, XD_CARD) == CD_NOT_EXIST)
			TRACE_RET(chip, STATUS_FAIL);

		page_addr = (u32) i << xd_card->block_shift;

		for (j = 0; j < 3; j++) {
			retval = xd_read_redundant(chip, page_addr, redunt, 11);
			if (retval == STATUS_SUCCESS)
				break;
		}
		if (j == 3)
			continue;

		if (redunt[BLOCK_STATUS] != XD_GBLK)
			continue;

		j = 0;
		/* Check page status */
		if (redunt[PAGE_STATUS] != XD_GPG) {
			for (j = 1; j <= 8; j++) {
				retval =
				    xd_read_redundant(chip, page_addr + j,
						      redunt, 11);
				if (retval == STATUS_SUCCESS) {
					if (redunt[PAGE_STATUS] == XD_GPG)
						break;
				}
			}

			if (j == 9)
				break;
		}

		if ((redunt[BLOCK_STATUS] == XD_GBLK)
		    && (redunt[PARITY] & XD_BA1_ALL0)) {
			u8 buf[10];

			page_addr += j;

			retval = xd_read_cis(chip, page_addr, buf, 10);
			if (retval != STATUS_SUCCESS)
				TRACE_RET(chip, retval);

			if ((buf[0] == 0x01) && (buf[1] == 0x03)
			    && (buf[2] == 0xD9)
			    && (buf[3] == 0x01) && (buf[4] == 0xFF)
			    && (buf[5] == 0x18) && (buf[6] == 0x02)
			    && (buf[7] == 0xDF) && (buf[8] == 0x01)
			    && (buf[9] == 0x20)) {
				xd_card->cis_block = (u16) i;
			}
		}

		break;
	}

	RTS51X_DEBUGP("CIS block: 0x%x\n", xd_card->cis_block);
	if (xd_card->cis_block == 0xFFFF)
		TRACE_RET(chip, STATUS_FAIL);

	chip->capacity[chip->card2lun[XD_CARD]] = xd_card->capacity;

	return STATUS_SUCCESS;
}

static int xd_check_data_blank(u8 *redunt)
{
	int i;

	for (i = 0; i < 6; i++) {
		if (redunt[PAGE_STATUS + i] != 0xFF)
			return 0;
	}

	if ((redunt[PARITY] & (XD_ECC1_ALL1 | XD_ECC2_ALL1)) !=
	    (XD_ECC1_ALL1 | XD_ECC2_ALL1))
		return 0;

	for (i = 0; i < 4; i++) {
		if (redunt[RESERVED0 + i] != 0xFF)
			return 0;
	}

	return 1;
}

static u16 xd_load_log_block_addr(u8 *redunt)
{
	u16 addr = 0xFFFF;

	if (redunt[PARITY] & XD_BA1_BA2_EQL)
		addr =
		    ((u16) redunt[BLOCK_ADDR1_H] << 8) | redunt[BLOCK_ADDR1_L];
	else if (redunt[PARITY] & XD_BA1_VALID)
		addr =
		    ((u16) redunt[BLOCK_ADDR1_H] << 8) | redunt[BLOCK_ADDR1_L];
	else if (redunt[PARITY] & XD_BA2_VALID)
		addr =
		    ((u16) redunt[BLOCK_ADDR2_H] << 8) | redunt[BLOCK_ADDR2_L];

	return addr;
}

static int xd_init_l2p_tbl(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int size, i;

	RTS51X_DEBUGP("xd_init_l2p_tbl: zone_cnt = %d\n", xd_card->zone_cnt);

	if (xd_card->zone_cnt < 1)
		TRACE_RET(chip, STATUS_FAIL);

	size = xd_card->zone_cnt * sizeof(struct zone_entry);
	RTS51X_DEBUGP("Buffer size for l2p table is %d\n", size);

	xd_card->zone = vmalloc(size);
	if (!xd_card->zone)
		TRACE_RET(chip, STATUS_NOMEM);

	for (i = 0; i < xd_card->zone_cnt; i++) {
		xd_card->zone[i].build_flag = 0;
		xd_card->zone[i].l2p_table = NULL;
		xd_card->zone[i].free_table = NULL;
		xd_card->zone[i].get_index = 0;
		xd_card->zone[i].set_index = 0;
		xd_card->zone[i].unused_blk_cnt = 0;
	}

	return STATUS_SUCCESS;
}

static inline void free_zone(struct zone_entry *zone)
{
	RTS51X_DEBUGP("free_zone\n");
	if (!zone)
		return;
	zone->build_flag = 0;
	zone->set_index = 0;
	zone->get_index = 0;
	zone->unused_blk_cnt = 0;
	if (zone->l2p_table) {
		vfree(zone->l2p_table);
		zone->l2p_table = NULL;
	}
	if (zone->free_table) {
		vfree(zone->free_table);
		zone->free_table = NULL;
	}
}

static void xd_set_unused_block(struct rts51x_chip *chip, u32 phy_blk)
{
	struct xd_info *xd_card = &(chip->xd_card);
	struct zone_entry *zone;
	int zone_no;

	zone_no = (int)phy_blk >> 10;
	if (zone_no >= xd_card->zone_cnt) {
		RTS51X_DEBUGP("Set unused block to invalid zone"
					"(zone_no = %d, zone_cnt = %d)\n",
					zone_no, xd_card->zone_cnt);
		return;
	}
	zone = &(xd_card->zone[zone_no]);

	if (zone->free_table == NULL) {
		if (xd_build_l2p_tbl(chip, zone_no) != STATUS_SUCCESS)
			return;
	}

	if ((zone->set_index >= XD_FREE_TABLE_CNT)
	    || (zone->set_index < 0)) {
		free_zone(zone);
		RTS51X_DEBUGP("Set unused block fail, invalid set_index\n");
		return;
	}

	RTS51X_DEBUGP("Set unused block to index %d\n", zone->set_index);

	zone->free_table[zone->set_index++] = (u16) (phy_blk & 0x3ff);
	if (zone->set_index >= XD_FREE_TABLE_CNT)
		zone->set_index = 0;
	zone->unused_blk_cnt++;
}

static u32 xd_get_unused_block(struct rts51x_chip *chip, int zone_no)
{
	struct xd_info *xd_card = &(chip->xd_card);
	struct zone_entry *zone;
	u32 phy_blk;

	if (zone_no >= xd_card->zone_cnt) {
		RTS51X_DEBUGP("Get unused block from invalid zone"
					"(zone_no = %d, zone_cnt = %d)\n",
					zone_no, xd_card->zone_cnt);
		TRACE_RET(chip, BLK_NOT_FOUND);
	}
	zone = &(xd_card->zone[zone_no]);

	if ((zone->unused_blk_cnt == 0) ||
			(zone->set_index == zone->get_index)) {
		free_zone(zone);
		RTS51X_DEBUGP("Get unused block fail,"
					"no unused block available\n");
		TRACE_RET(chip, BLK_NOT_FOUND);
	}
	if ((zone->get_index >= XD_FREE_TABLE_CNT) || (zone->get_index < 0)) {
		free_zone(zone);
		RTS51X_DEBUGP("Get unused block fail, invalid get_index\n");
		TRACE_RET(chip, BLK_NOT_FOUND);
	}

	RTS51X_DEBUGP("Get unused block from index %d\n", zone->get_index);

	phy_blk = zone->free_table[zone->get_index];
	zone->free_table[zone->get_index++] = 0xFFFF;
	if (zone->get_index >= XD_FREE_TABLE_CNT)
		zone->get_index = 0;
	zone->unused_blk_cnt--;

	phy_blk += ((u32) (zone_no) << 10);
	return phy_blk;
}

static void xd_set_l2p_tbl(struct rts51x_chip *chip, int zone_no, u16 log_off,
			   u16 phy_off)
{
	struct xd_info *xd_card = &(chip->xd_card);
	struct zone_entry *zone;

	zone = &(xd_card->zone[zone_no]);
	zone->l2p_table[log_off] = phy_off;
}

static int xd_delay_write(struct rts51x_chip *chip);

static u32 xd_get_l2p_tbl(struct rts51x_chip *chip, int zone_no, u16 log_off)
{
	struct xd_info *xd_card = &(chip->xd_card);
	struct zone_entry *zone;
	int retval;

	zone = &(xd_card->zone[zone_no]);
	if (zone->l2p_table[log_off] == 0xFFFF) {
		u32 phy_blk = 0;
		int i;

		retval = xd_delay_write(chip);
		if (retval != STATUS_SUCCESS) {
			RTS51X_DEBUGP("In xd_get_l2p_tbl,"
						"delay write fail!\n");
			TRACE_RET(chip, BLK_NOT_FOUND);
		}

		if (zone->unused_blk_cnt <= 0) {
			RTS51X_DEBUGP("No unused block!\n");
			TRACE_RET(chip, BLK_NOT_FOUND);
		}

		for (i = 0; i < zone->unused_blk_cnt; i++) {
			phy_blk = xd_get_unused_block(chip, zone_no);
			if (phy_blk == BLK_NOT_FOUND) {
				RTS51X_DEBUGP("No unused block available!\n");
				TRACE_RET(chip, BLK_NOT_FOUND);
			}

			retval =
			    xd_init_page(chip, phy_blk, log_off, 0,
					 xd_card->page_off + 1);
			if (retval == STATUS_SUCCESS)
				break;
		}
		if (i >= zone->unused_blk_cnt) {
			RTS51X_DEBUGP("No good unused block available!\n");
			TRACE_RET(chip, BLK_NOT_FOUND);
		}

		xd_set_l2p_tbl(chip, zone_no, log_off, (u16) (phy_blk & 0x3FF));
		return phy_blk;
	}

	return (u32) zone->l2p_table[log_off] + ((u32) (zone_no) << 10);
}

int rts51x_reset_xd_card(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int retval;

	memset(xd_card, 0, sizeof(struct xd_info));

	xd_card->block_shift = 0;
	xd_card->page_off = 0;
	xd_card->addr_cycle = 0;
	xd_card->capacity = 0;
	xd_card->zone_cnt = 0;
	xd_card->cis_block = 0xFFFF;
	xd_card->delay_write.delay_write_flag = 0;

	rts51x_enable_card_clock(chip, XD_CARD);

	retval = reset_xd(chip);
	if (retval != STATUS_SUCCESS) {
		if (chip->option.reset_or_rw_fail_set_pad_drive) {
			rts51x_write_register(chip, CARD_DRIVE_SEL,
					      SD20_DRIVE_MASK, DRIVE_8mA);
		}
		TRACE_RET(chip, retval);
	}

	retval = xd_init_l2p_tbl(chip);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	return STATUS_SUCCESS;
}

static int xd_mark_bad_block(struct rts51x_chip *chip, u32 phy_blk)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int retval;
	u32 page_addr;
	u8 reg = 0;

	RTS51X_DEBUGP("mark block 0x%x as bad block\n", phy_blk);

	if (phy_blk == BLK_NOT_FOUND)
		TRACE_RET(chip, STATUS_FAIL);

	rts51x_init_cmd(chip);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_STATUS, 0xFF, XD_GPG);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_STATUS, 0xFF,
		       XD_LATER_BBLK);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_ADDR1_H, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_ADDR1_L, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_ADDR2_H, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_ADDR2_L, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_RESERVED0, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_RESERVED1, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_RESERVED2, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_RESERVED3, 0xFF, 0xFF);

	page_addr = phy_blk << xd_card->block_shift;

	xd_assign_phy_addr(chip, page_addr, XD_RW_ADDR);

	/* Specify page count */
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_CNT, 0xFF,
		       xd_card->page_off + 1);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_WRITE_REDUNDANT);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER, XD_TRANSFER_END,
		       XD_TRANSFER_END);

	retval = rts51x_send_cmd(chip, MODE_CR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, STATUS_FAIL);

	retval = rts51x_get_rsp(chip, 1, 100);

	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);
		rts51x_ep0_read_register(chip, XD_DAT, &reg);
		if (reg & PROGRAM_ERROR)
			xd_set_err_code(chip, XD_PRG_ERROR);
		else
			xd_set_err_code(chip, XD_TO_ERROR);
		TRACE_RET(chip, STATUS_FAIL);
	}

	return STATUS_SUCCESS;
}

static int xd_init_page(struct rts51x_chip *chip, u32 phy_blk, u16 logoff,
			u8 start_page, u8 end_page)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int retval;
	u32 page_addr;
	u8 reg = 0;

	RTS51X_DEBUGP("Init block 0x%x\n", phy_blk);

	if (start_page > end_page)
		TRACE_RET(chip, STATUS_FAIL);
	if (phy_blk == BLK_NOT_FOUND)
		TRACE_RET(chip, STATUS_FAIL);

	rts51x_init_cmd(chip);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_STATUS, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_STATUS, 0xFF, 0xFF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_ADDR1_H, 0xFF,
		       (u8) (logoff >> 8));
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_ADDR1_L, 0xFF,
		       (u8) logoff);

	page_addr = (phy_blk << xd_card->block_shift) + start_page;

	xd_assign_phy_addr(chip, page_addr, XD_RW_ADDR);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CFG, XD_BA_TRANSFORM,
		       XD_BA_TRANSFORM);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_CNT, 0xFF,
		       (end_page - start_page));

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_WRITE_REDUNDANT);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER, XD_TRANSFER_END,
		       XD_TRANSFER_END);

	retval = rts51x_send_cmd(chip, MODE_CR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, STATUS_FAIL);

	retval = rts51x_get_rsp(chip, 1, 500);

	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);
		rts51x_ep0_read_register(chip, XD_DAT, &reg);
		if (reg & PROGRAM_ERROR) {
			xd_mark_bad_block(chip, phy_blk);
			xd_set_err_code(chip, XD_PRG_ERROR);
		} else {
			xd_set_err_code(chip, XD_TO_ERROR);
		}
		TRACE_RET(chip, STATUS_FAIL);
	}

	return STATUS_SUCCESS;
}

static int xd_copy_page(struct rts51x_chip *chip,
			u32 old_blk, u32 new_blk, u8 start_page, u8 end_page)
{
	struct xd_info *xd_card = &(chip->xd_card);
	u32 old_page, new_page;
	u8 i, reg = 0;
	int retval;

	RTS51X_DEBUGP("Copy page from block 0x%x to block 0x%x\n", old_blk,
		       new_blk);

	if (start_page > end_page)
		TRACE_RET(chip, STATUS_FAIL);

	if ((old_blk == BLK_NOT_FOUND) || (new_blk == BLK_NOT_FOUND))
		TRACE_RET(chip, STATUS_FAIL);

	old_page = (old_blk << xd_card->block_shift) + start_page;
	new_page = (new_blk << xd_card->block_shift) + start_page;

	XD_CLR_BAD_NEWBLK(xd_card);

	RTS51X_WRITE_REG(chip, CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);

	for (i = start_page; i < end_page; i++) {
		if (monitor_card_cd(chip, XD_CARD) == CD_NOT_EXIST) {
			RTS51X_WRITE_REG(chip, CARD_STOP, XD_STOP | XD_CLR_ERR,
					 XD_STOP | XD_CLR_ERR);
			xd_set_err_code(chip, XD_NO_CARD);
			TRACE_RET(chip, STATUS_FAIL);
		}

		rts51x_init_cmd(chip);

		xd_assign_phy_addr(chip, old_page, XD_RW_ADDR);

		/* Single page read */
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_CNT, 0xFF, 1);
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CHK_DATA_STATUS,
			       XD_AUTO_CHK_DATA_STATUS, 0);
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
			       XD_TRANSFER_START | XD_READ_PAGES);
		rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER,
			       XD_TRANSFER_END, XD_TRANSFER_END);

		retval = rts51x_send_cmd(chip, MODE_CR | STAGE_XD_STATUS, 100);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);

		retval = rts51x_get_rsp(chip, 4, 500);
		if ((retval != STATUS_SUCCESS) ||
		    (chip->rsp_buf[2] & (XD_ECC1_ERROR | XD_ECC2_ERROR))) {
			rts51x_clear_xd_error(chip);
			reg = 0;
			rts51x_ep0_read_register(chip, XD_CTL, &reg);
			if (reg & (XD_ECC1_ERROR | XD_ECC2_ERROR)) {
				wait_timeout(100);

				if (monitor_card_cd(chip, XD_CARD) ==
				    CD_NOT_EXIST) {
					xd_set_err_code(chip, XD_NO_CARD);
					TRACE_RET(chip, STATUS_FAIL);
				}

				if (((reg &
				      (XD_ECC1_ERROR | XD_ECC1_UNCORRECTABLE))
				     == (XD_ECC1_ERROR | XD_ECC1_UNCORRECTABLE))
				    || ((reg & (XD_ECC2_ERROR |
					XD_ECC2_UNCORRECTABLE)) ==
				     (XD_ECC2_ERROR | XD_ECC2_UNCORRECTABLE))) {
					RTS51X_WRITE_REG(chip, XD_PAGE_STATUS,
							 0xFF, XD_BPG);
					RTS51X_WRITE_REG(chip, XD_BLOCK_STATUS,
							 0xFF, XD_GBLK);
					XD_SET_BAD_OLDBLK(xd_card);
					RTS51X_DEBUGP("old block 0x%x"
						"ecc error\n", old_blk);
				}
			} else {
				xd_set_err_code(chip, XD_TO_ERROR);
				TRACE_RET(chip, STATUS_FAIL);
			}
		}
		if (XD_CHK_BAD_OLDBLK(xd_card))
			rts51x_clear_xd_error(chip);

		rts51x_init_cmd(chip);

		xd_assign_phy_addr(chip, new_page, XD_RW_ADDR);
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_CNT, 0xFF, 1);
		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
			       XD_TRANSFER_START | XD_WRITE_PAGES);
		rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER,
			       XD_TRANSFER_END, XD_TRANSFER_END);

		retval = rts51x_send_cmd(chip, MODE_CR, 100);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);

		retval = rts51x_get_rsp(chip, 1, 300);
		if (retval != STATUS_SUCCESS) {
			rts51x_clear_xd_error(chip);
			reg = 0;
			rts51x_ep0_read_register(chip, XD_DAT, &reg);
			if (reg & PROGRAM_ERROR) {
				xd_mark_bad_block(chip, new_blk);
				xd_set_err_code(chip, XD_PRG_ERROR);
				XD_SET_BAD_NEWBLK(xd_card);
			} else {
				xd_set_err_code(chip, XD_TO_ERROR);
			}
			TRACE_RET(chip, retval);
		}

		old_page++;
		new_page++;
	}

	return STATUS_SUCCESS;
}

static int xd_reset_cmd(struct rts51x_chip *chip)
{
	int retval;
	u8 xd_dat, xd_ctl;

	rts51x_init_cmd(chip);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_RESET);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER, XD_TRANSFER_END,
		       XD_TRANSFER_END);
	rts51x_add_cmd(chip, READ_REG_CMD, XD_DAT, 0, 0);
	rts51x_add_cmd(chip, READ_REG_CMD, XD_CTL, 0, 0);

	retval = rts51x_send_cmd(chip, MODE_CR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval = rts51x_get_rsp(chip, 3, 100);
	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);
		TRACE_RET(chip, retval);
	}

	xd_dat = chip->rsp_buf[1];
	xd_ctl = chip->rsp_buf[2];
	if (((xd_dat & READY_FLAG) == READY_STATE) && (xd_ctl & XD_RDY))
		return STATUS_SUCCESS;

	TRACE_RET(chip, STATUS_FAIL);
}

static int xd_erase_block(struct rts51x_chip *chip, u32 phy_blk)
{
	struct xd_info *xd_card = &(chip->xd_card);
	u32 page_addr;
	u8 reg = 0, xd_dat;
	int i, retval;

	if (phy_blk == BLK_NOT_FOUND)
		TRACE_RET(chip, STATUS_FAIL);

	page_addr = phy_blk << xd_card->block_shift;

	for (i = 0; i < 3; i++) {
		rts51x_init_cmd(chip);

		xd_assign_phy_addr(chip, page_addr, XD_ERASE_ADDR);

		rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
			       XD_TRANSFER_START | XD_ERASE);
		rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER,
			       XD_TRANSFER_END, XD_TRANSFER_END);
		rts51x_add_cmd(chip, READ_REG_CMD, XD_DAT, 0, 0);

		retval = rts51x_send_cmd(chip, MODE_CR, 100);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);

		retval = rts51x_get_rsp(chip, 2, 300);
		if (retval != STATUS_SUCCESS) {
			rts51x_clear_xd_error(chip);
			rts51x_ep0_read_register(chip, XD_DAT, &reg);
			if (reg & PROGRAM_ERROR) {
				xd_mark_bad_block(chip, phy_blk);
				xd_set_err_code(chip, XD_PRG_ERROR);
				TRACE_RET(chip, STATUS_FAIL);
			} else {
				xd_set_err_code(chip, XD_ERASE_FAIL);
			}
			retval = xd_reset_cmd(chip);
			if (retval != STATUS_SUCCESS)
				TRACE_RET(chip, retval);
			continue;
		}
		xd_dat = chip->rsp_buf[1];
		if (xd_dat & PROGRAM_ERROR) {
			xd_mark_bad_block(chip, phy_blk);
			xd_set_err_code(chip, XD_PRG_ERROR);
			TRACE_RET(chip, STATUS_FAIL);
		}

		return STATUS_SUCCESS;
	}

	xd_mark_bad_block(chip, phy_blk);
	xd_set_err_code(chip, XD_ERASE_FAIL);
	TRACE_RET(chip, STATUS_FAIL);
}

static int xd_build_l2p_tbl(struct rts51x_chip *chip, int zone_no)
{
	struct xd_info *xd_card = &(chip->xd_card);
	struct zone_entry *zone;
	int retval;
	u32 start, end, i;
	u16 max_logoff, cur_fst_page_logoff, cur_lst_page_logoff,
	    ent_lst_page_logoff;
	u8 redunt[11];

	RTS51X_DEBUGP("xd_build_l2p_tbl: %d\n", zone_no);

	if (xd_card->zone == NULL) {
		retval = xd_init_l2p_tbl(chip);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);
	}

	if (xd_card->zone[zone_no].build_flag) {
		RTS51X_DEBUGP("l2p table of zone %d has been built\n",
			       zone_no);
		return STATUS_SUCCESS;
	}

	zone = &(xd_card->zone[zone_no]);

	if (zone->l2p_table == NULL) {
		zone->l2p_table = vmalloc(2000);
		if (zone->l2p_table == NULL)
			TRACE_GOTO(chip, Build_Fail);
	}
	memset((u8 *) (zone->l2p_table), 0xff, 2000);

	if (zone->free_table == NULL) {
		zone->free_table = vmalloc(XD_FREE_TABLE_CNT * 2);
		if (zone->free_table == NULL)
			TRACE_GOTO(chip, Build_Fail);
	}
	memset((u8 *) (zone->free_table), 0xff, XD_FREE_TABLE_CNT * 2);

	if (zone_no == 0) {
		if (xd_card->cis_block == 0xFFFF)
			start = 0;
		else
			start = xd_card->cis_block + 1;
		if (XD_CHK_4MB(xd_card)) {
			end = 0x200;
			max_logoff = 499;
		} else {
			end = 0x400;
			max_logoff = 999;
		}
	} else {
		start = (u32) (zone_no) << 10;
		end = (u32) (zone_no + 1) << 10;
		max_logoff = 999;
	}

	RTS51X_DEBUGP("start block 0x%x, end block 0x%x\n", start, end);

	zone->set_index = zone->get_index = 0;
	zone->unused_blk_cnt = 0;

	for (i = start; i < end; i++) {
		u32 page_addr = i << xd_card->block_shift;
		u32 phy_block;

		retval = xd_read_redundant(chip, page_addr, redunt, 11);
		if (retval != STATUS_SUCCESS)
			continue;

		if (redunt[BLOCK_STATUS] != 0xFF) {
			RTS51X_DEBUGP("bad block\n");
			continue;
		}

		if (xd_check_data_blank(redunt)) {
			RTS51X_DEBUGP("blank block\n");
			xd_set_unused_block(chip, i);
			continue;
		}

		cur_fst_page_logoff = xd_load_log_block_addr(redunt);
		if ((cur_fst_page_logoff == 0xFFFF)
		    || (cur_fst_page_logoff > max_logoff)) {
			retval = xd_erase_block(chip, i);
			if (retval == STATUS_SUCCESS)
				xd_set_unused_block(chip, i);
			continue;
		}
		if ((zone_no == 0) && (cur_fst_page_logoff == 0)
		    && (redunt[PAGE_STATUS] != XD_GPG))
			XD_SET_MBR_FAIL(xd_card);

		if (zone->l2p_table[cur_fst_page_logoff] == 0xFFFF) {
			zone->l2p_table[cur_fst_page_logoff] =
			    (u16) (i & 0x3FF);
			continue;
		}

		phy_block =
		    zone->l2p_table[cur_fst_page_logoff] +
		    ((u32) ((zone_no) << 10));

		page_addr = ((i + 1) << xd_card->block_shift) - 1;

		retval = xd_read_redundant(chip, page_addr, redunt, 11);
		if (retval != STATUS_SUCCESS)
			continue;

		cur_lst_page_logoff = xd_load_log_block_addr(redunt);
		if (cur_lst_page_logoff == cur_fst_page_logoff) {
			int m;

			page_addr =
			    ((phy_block + 1) << xd_card->block_shift) - 1;

			for (m = 0; m < 3; m++) {
				retval =
				    xd_read_redundant(chip, page_addr, redunt,
						      11);
				if (retval == STATUS_SUCCESS)
					break;
			}

			if (m == 3) {
				zone->l2p_table[cur_fst_page_logoff] =
				    (u16) (i & 0x3FF);
				retval = xd_erase_block(chip, phy_block);
				if (retval == STATUS_SUCCESS)
					xd_set_unused_block(chip, phy_block);
				continue;
			}

			ent_lst_page_logoff = xd_load_log_block_addr(redunt);
			if (ent_lst_page_logoff != cur_fst_page_logoff) {
				zone->l2p_table[cur_fst_page_logoff] =
				    (u16) (i & 0x3FF);
				retval = xd_erase_block(chip, phy_block);
				if (retval == STATUS_SUCCESS)
					xd_set_unused_block(chip, phy_block);
				continue;
			} else {
				retval = xd_erase_block(chip, i);
				if (retval == STATUS_SUCCESS)
					xd_set_unused_block(chip, i);
			}
		} else {
			retval = xd_erase_block(chip, i);
			if (retval == STATUS_SUCCESS)
				xd_set_unused_block(chip, i);
		}
	}

	if (XD_CHK_4MB(xd_card))
		end = 500;
	else
		end = 1000;

	i = 0;
	for (start = 0; start < end; start++) {
		if (zone->l2p_table[start] == 0xFFFF)
			i++;
	}

	RTS51X_DEBUGP("Block count %d, invalid L2P entry %d\n", end, i);
	RTS51X_DEBUGP("Total unused block: %d\n", zone->unused_blk_cnt);

	if ((zone->unused_blk_cnt - i) < 1)
		chip->card_wp |= XD_CARD;

	zone->build_flag = 1;

	return STATUS_SUCCESS;

Build_Fail:
	if (zone->l2p_table) {
		vfree(zone->l2p_table);
		zone->l2p_table = NULL;
	}
	if (zone->free_table) {
		vfree(zone->free_table);
		zone->free_table = NULL;
	}

	return STATUS_FAIL;
}

static int xd_send_cmd(struct rts51x_chip *chip, u8 cmd)
{
	int retval;

	rts51x_init_cmd(chip);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_DAT, 0xFF, cmd);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_SET_CMD);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER, XD_TRANSFER_END,
		       XD_TRANSFER_END);

	retval = rts51x_send_cmd(chip, MODE_CR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval = rts51x_get_rsp(chip, 1, 200);
	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);
		TRACE_RET(chip, retval);
	}

	return STATUS_SUCCESS;
}

static int xd_read_multiple_pages(struct rts51x_chip *chip, u32 phy_blk,
				  u32 log_blk, u8 start_page, u8 end_page,
				  u8 *buf, void **ptr, unsigned int *offset)
{
	struct xd_info *xd_card = &(chip->xd_card);
	u32 page_addr, new_blk;
	u16 log_off;
	u8 reg_val, page_cnt;
	int zone_no, retval, i;

	if (start_page > end_page)
		TRACE_RET(chip, STATUS_FAIL);

	page_cnt = end_page - start_page;
	zone_no = (int)(log_blk / 1000);
	log_off = (u16) (log_blk % 1000);

	if ((phy_blk & 0x3FF) == 0x3FF) {
		for (i = 0; i < 256; i++) {
			page_addr = ((u32) i) << xd_card->block_shift;

			retval = xd_read_redundant(chip, page_addr, NULL, 0);
			if (retval == STATUS_SUCCESS)
				break;

			if (monitor_card_cd(chip, XD_CARD) == CD_NOT_EXIST) {
				xd_set_err_code(chip, XD_NO_CARD);
				TRACE_RET(chip, STATUS_FAIL);
			}
		}
	}

	page_addr = (phy_blk << xd_card->block_shift) + start_page;

	rts51x_init_cmd(chip);

	xd_assign_phy_addr(chip, page_addr, XD_RW_ADDR);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CFG, XD_PPB_TO_SIE,
		       XD_PPB_TO_SIE);
	rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_DATA_SOURCE, 0x01,
		       RING_BUFFER);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_CNT, 0xFF, page_cnt);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CHK_DATA_STATUS,
		       XD_AUTO_CHK_DATA_STATUS, XD_AUTO_CHK_DATA_STATUS);

	rts51x_trans_dma_enable(chip->srb->sc_data_direction, chip,
			page_cnt * 512, DMA_512);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_READ_PAGES);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER,
		       XD_TRANSFER_END | XD_PPB_EMPTY,
		       XD_TRANSFER_END | XD_PPB_EMPTY);

	retval = rts51x_send_cmd(chip, MODE_CDIR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval =
	    rts51x_transfer_data_partial(chip, RCV_BULK_PIPE(chip), (void *)buf,
					 ptr, offset, page_cnt * 512,
					 scsi_sg_count(chip->srb), NULL, 2000);
	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);

		if (retval == STATUS_TIMEDOUT) {
			xd_set_err_code(chip, XD_TO_ERROR);
			TRACE_RET(chip, retval);
		} else {
			TRACE_GOTO(chip, Fail);
		}
	}
	retval = rts51x_get_rsp(chip, 1, 200);
	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);

		if (retval == STATUS_TIMEDOUT) {
			xd_set_err_code(chip, XD_TO_ERROR);
			TRACE_RET(chip, retval);
		} else {
			TRACE_GOTO(chip, Fail);
		}
	}

	return STATUS_SUCCESS;

Fail:
	rts51x_ep0_read_register(chip, XD_PAGE_STATUS, &reg_val);
	RTS51X_DEBUGP("XD_PAGE_STATUS: 0x%x\n", reg_val);

	if (reg_val != XD_GPG)
		xd_set_err_code(chip, XD_PRG_ERROR);

	rts51x_ep0_read_register(chip, XD_CTL, &reg_val);
	RTS51X_DEBUGP("XD_CTL: 0x%x\n", reg_val);

	/* Handle uncorrectable ECC error */
	if (((reg_val & (XD_ECC1_ERROR | XD_ECC1_UNCORRECTABLE))
	     == (XD_ECC1_ERROR | XD_ECC1_UNCORRECTABLE))
	    || ((reg_val & (XD_ECC2_ERROR | XD_ECC2_UNCORRECTABLE))
		== (XD_ECC2_ERROR | XD_ECC2_UNCORRECTABLE))) {
		wait_timeout(100);

		if (monitor_card_cd(chip, XD_CARD) == CD_NOT_EXIST) {
			xd_set_err_code(chip, XD_NO_CARD);
			TRACE_RET(chip, STATUS_FAIL);
		}

		xd_set_err_code(chip, XD_ECC_ERROR);

		new_blk = xd_get_unused_block(chip, zone_no);
		if (new_blk == NO_NEW_BLK) {
			XD_CLR_BAD_OLDBLK(xd_card);
			TRACE_RET(chip, STATUS_FAIL);
		}
		retval =
		    xd_copy_page(chip, phy_blk, new_blk, 0,
				 xd_card->page_off + 1);
		if (retval != STATUS_SUCCESS) {
			if (!XD_CHK_BAD_NEWBLK(xd_card)) {
				retval = xd_erase_block(chip, new_blk);
				if (retval == STATUS_SUCCESS)
					xd_set_unused_block(chip, new_blk);
			} else {
				XD_CLR_BAD_NEWBLK(xd_card);
			}
			XD_CLR_BAD_OLDBLK(xd_card);
			TRACE_RET(chip, STATUS_FAIL);
		}
		xd_set_l2p_tbl(chip, zone_no, log_off, (u16) (new_blk & 0x3FF));
		xd_erase_block(chip, phy_blk);
		xd_mark_bad_block(chip, phy_blk);
		XD_CLR_BAD_OLDBLK(xd_card);
	}

	TRACE_RET(chip, STATUS_FAIL);
}

static int xd_finish_write(struct rts51x_chip *chip,
			   u32 old_blk, u32 new_blk, u32 log_blk, u8 page_off)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int retval, zone_no;
	u16 log_off;

	RTS51X_DEBUGP("xd_finish_write, old_blk = 0x%x, new_blk = 0x%x,"
				"log_blk = 0x%x\n", old_blk, new_blk, log_blk);

	if (page_off > xd_card->page_off)
		TRACE_RET(chip, STATUS_FAIL);

	zone_no = (int)(log_blk / 1000);
	log_off = (u16) (log_blk % 1000);

	if (old_blk == BLK_NOT_FOUND) {
		retval = xd_init_page(chip, new_blk, log_off,
				      page_off, xd_card->page_off + 1);
		if (retval != STATUS_SUCCESS) {
			retval = xd_erase_block(chip, new_blk);
			if (retval == STATUS_SUCCESS)
				xd_set_unused_block(chip, new_blk);
			TRACE_RET(chip, STATUS_FAIL);
		}
	} else {
		retval = xd_copy_page(chip, old_blk, new_blk,
				      page_off, xd_card->page_off + 1);
		if (retval != STATUS_SUCCESS) {
			if (!XD_CHK_BAD_NEWBLK(xd_card)) {
				retval = xd_erase_block(chip, new_blk);
				if (retval == STATUS_SUCCESS)
					xd_set_unused_block(chip, new_blk);
			}
			XD_CLR_BAD_NEWBLK(xd_card);
			TRACE_RET(chip, STATUS_FAIL);
		}

		retval = xd_erase_block(chip, old_blk);
		if (retval == STATUS_SUCCESS) {
			if (XD_CHK_BAD_OLDBLK(xd_card)) {
				xd_mark_bad_block(chip, old_blk);
				XD_CLR_BAD_OLDBLK(xd_card);
			} else {
				/* Add source block to unused block */
				xd_set_unused_block(chip, old_blk);
			}
		} else {
			xd_set_err_code(chip, XD_NO_ERROR);
			XD_CLR_BAD_OLDBLK(xd_card);
		}
	}

	/* Add target block to L2P table */
	xd_set_l2p_tbl(chip, zone_no, log_off, (u16) (new_blk & 0x3FF));

	return STATUS_SUCCESS;
}

static int xd_prepare_write(struct rts51x_chip *chip,
			    u32 old_blk, u32 new_blk, u32 log_blk, u8 page_off)
{
	int retval;

	RTS51X_DEBUGP("xd_prepare_write, old_blk = 0x%x, new_blk = 0x%x,"
				"log_blk = 0x%x, page_off = %d\n",
				old_blk, new_blk, log_blk, (int)page_off);

	if (page_off) {
		retval = xd_copy_page(chip, old_blk, new_blk, 0, page_off);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);
	}

	return STATUS_SUCCESS;
}

static int xd_write_multiple_pages(struct rts51x_chip *chip, u32 old_blk,
				   u32 new_blk, u32 log_blk, u8 start_page,
				   u8 end_page, u8 *buf, void **ptr,
				   unsigned int *offset)
{
	struct xd_info *xd_card = &(chip->xd_card);
	u32 page_addr;
	int zone_no, retval;
	u16 log_off;
	u8 page_cnt, reg_val;

	RTS51X_DEBUGP("xd_write_multiple_pages, old_blk = 0x%x,"
				"new_blk = 0x%x, log_blk = 0x%x\n",
				old_blk, new_blk, log_blk);

	if (start_page > end_page)
		TRACE_RET(chip, STATUS_FAIL);

	page_cnt = end_page - start_page;
	zone_no = (int)(log_blk / 1000);
	log_off = (u16) (log_blk % 1000);

	page_addr = (new_blk << xd_card->block_shift) + start_page;

	/* Send index command */
	retval = xd_send_cmd(chip, READ1_1);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	rts51x_init_cmd(chip);

	/* Prepare redundant field */
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_ADDR1_H, 0xFF,
		       (u8) (log_off >> 8));
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_ADDR1_L, 0xFF,
		       (u8) log_off);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_BLOCK_STATUS, 0xFF, XD_GBLK);
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_STATUS, 0xFF, XD_GPG);

	xd_assign_phy_addr(chip, page_addr, XD_RW_ADDR);

	/* Transform the block address by hardware */
	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_CFG, XD_BA_TRANSFORM,
		       XD_BA_TRANSFORM);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_PAGE_CNT, 0xFF, page_cnt);
	rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_DATA_SOURCE, 0x01,
		       RING_BUFFER);

	rts51x_trans_dma_enable(chip->srb->sc_data_direction, chip,
			page_cnt * 512, DMA_512);

	rts51x_add_cmd(chip, WRITE_REG_CMD, XD_TRANSFER, 0xFF,
		       XD_TRANSFER_START | XD_WRITE_PAGES);
	rts51x_add_cmd(chip, CHECK_REG_CMD, XD_TRANSFER, XD_TRANSFER_END,
		       XD_TRANSFER_END);

	retval = rts51x_send_cmd(chip, MODE_CDOR, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	retval =
	    rts51x_transfer_data_partial(chip, SND_BULK_PIPE(chip), (void *)buf,
					 ptr, offset, page_cnt * 512,
					 scsi_sg_count(chip->srb), NULL, 2000);
	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);

		if (retval == STATUS_TIMEDOUT) {
			xd_set_err_code(chip, XD_TO_ERROR);
			TRACE_RET(chip, retval);
		} else {
			TRACE_GOTO(chip, Fail);
		}
	}
	retval = rts51x_get_rsp(chip, 1, 200);
	if (retval != STATUS_SUCCESS) {
		rts51x_clear_xd_error(chip);

		if (retval == STATUS_TIMEDOUT) {
			xd_set_err_code(chip, XD_TO_ERROR);
			TRACE_RET(chip, retval);
		} else {
			TRACE_GOTO(chip, Fail);
		}
	}

	if (end_page == (xd_card->page_off + 1)) {
		xd_card->delay_write.delay_write_flag = 0;

		if (old_blk != BLK_NOT_FOUND) {
			retval = xd_erase_block(chip, old_blk);
			if (retval == STATUS_SUCCESS) {
				if (XD_CHK_BAD_OLDBLK(xd_card)) {
					xd_mark_bad_block(chip, old_blk);
					XD_CLR_BAD_OLDBLK(xd_card);
				} else {
					xd_set_unused_block(chip, old_blk);
				}
			} else {
				xd_set_err_code(chip, XD_NO_ERROR);
				XD_CLR_BAD_OLDBLK(xd_card);
			}
		}
		xd_set_l2p_tbl(chip, zone_no, log_off, (u16) (new_blk & 0x3FF));
	}

	return STATUS_SUCCESS;

Fail:
	rts51x_ep0_read_register(chip, XD_DAT, &reg_val);
	RTS51X_DEBUGP("XD_DAT: 0x%x\n", reg_val);

	if (reg_val & PROGRAM_ERROR) {
		xd_set_err_code(chip, XD_PRG_ERROR);
		xd_mark_bad_block(chip, new_blk);
	}

	TRACE_RET(chip, STATUS_FAIL);
}

static int xd_delay_write(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);
	struct xd_delay_write_tag *delay_write = &(xd_card->delay_write);
	int retval;

	if (delay_write->delay_write_flag) {
		RTS51X_DEBUGP("xd_delay_write\n");
		retval = xd_switch_clock(chip);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);

		delay_write->delay_write_flag = 0;
		retval = xd_finish_write(chip,
					 delay_write->old_phyblock,
					 delay_write->new_phyblock,
					 delay_write->logblock,
					 delay_write->pageoff);
		if (retval != STATUS_SUCCESS)
			TRACE_RET(chip, retval);
	}

	return STATUS_SUCCESS;
}

int rts51x_xd_rw(struct scsi_cmnd *srb, struct rts51x_chip *chip,
	u32 start_sector, u16 sector_cnt)
{
	struct xd_info *xd_card = &(chip->xd_card);
	unsigned int lun = SCSI_LUN(srb);
	struct xd_delay_write_tag *delay_write = &(xd_card->delay_write);
	int retval, zone_no;
	u32 log_blk, old_blk = 0, new_blk = 0;
	u16 log_off, total_sec_cnt = sector_cnt;
	u8 start_page, end_page = 0, page_cnt;
	u8 *buf;
	void *ptr = NULL;
	unsigned int offset = 0;

	xd_set_err_code(chip, XD_NO_ERROR);

	xd_card->counter = 0;

	RTS51X_DEBUGP("rts51x_xd_rw: scsi_bufflen = %d, scsi_sg_count = %d\n",
		       scsi_bufflen(srb), scsi_sg_count(srb));
	RTS51X_DEBUGP("Data direction: %s\n",
		       (srb->sc_data_direction ==
			DMA_TO_DEVICE) ? "write" : "read");

	buf = (u8 *) scsi_sglist(srb);

	retval = xd_switch_clock(chip);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	log_blk = start_sector >> xd_card->block_shift;
	start_page = (u8) start_sector & xd_card->page_off;
	zone_no = (int)(log_blk / 1000);
	log_off = (u16) (log_blk % 1000);

	RTS51X_DEBUGP("log_blk = 0x%x\n", log_blk);

	if (xd_card->zone[zone_no].build_flag == 0) {
		retval = xd_build_l2p_tbl(chip, zone_no);
		if (retval != STATUS_SUCCESS) {
			chip->card_fail |= XD_CARD;
			rts51x_set_sense_type(chip, lun,
				SENSE_TYPE_MEDIA_NOT_PRESENT);
			TRACE_RET(chip, retval);
		}
	}

	if (srb->sc_data_direction == DMA_TO_DEVICE) {
		if (delay_write->delay_write_flag &&
		    (delay_write->logblock == log_blk) &&
		    (start_page > delay_write->pageoff)) {
			delay_write->delay_write_flag = 0;
			if (delay_write->old_phyblock != BLK_NOT_FOUND) {
				retval = xd_copy_page(chip,
						      delay_write->old_phyblock,
						      delay_write->new_phyblock,
						      delay_write->pageoff,
						      start_page);
				if (retval != STATUS_SUCCESS) {
					rts51x_set_sense_type(chip, lun,
						SENSE_TYPE_MEDIA_WRITE_ERR);
					TRACE_RET(chip, retval);
				}
			}
			old_blk = delay_write->old_phyblock;
			new_blk = delay_write->new_phyblock;
		} else if (delay_write->delay_write_flag &&
			   (delay_write->logblock == log_blk) &&
			   (start_page == delay_write->pageoff)) {
			delay_write->delay_write_flag = 0;
			old_blk = delay_write->old_phyblock;
			new_blk = delay_write->new_phyblock;
		} else {
			retval = xd_delay_write(chip);
			if (retval != STATUS_SUCCESS) {
				rts51x_set_sense_type(chip, lun,
					       SENSE_TYPE_MEDIA_WRITE_ERR);
				TRACE_RET(chip, retval);
			}
			old_blk = xd_get_l2p_tbl(chip, zone_no, log_off);
			new_blk = xd_get_unused_block(chip, zone_no);
			if ((old_blk == BLK_NOT_FOUND)
			    || (new_blk == BLK_NOT_FOUND)) {
				rts51x_set_sense_type(chip, lun,
					       SENSE_TYPE_MEDIA_WRITE_ERR);
				TRACE_RET(chip, retval);
			}

			retval =
			    xd_prepare_write(chip, old_blk, new_blk, log_blk,
					     start_page);
			if (retval != STATUS_SUCCESS) {
				if (monitor_card_cd(chip, XD_CARD) ==
				    CD_NOT_EXIST) {
					rts51x_set_sense_type(chip, lun,
						SENSE_TYPE_MEDIA_NOT_PRESENT);
					TRACE_RET(chip, STATUS_FAIL);
				}
				rts51x_set_sense_type(chip, lun,
					       SENSE_TYPE_MEDIA_WRITE_ERR);
				TRACE_RET(chip, retval);
			}
		}
	} else {
		retval = xd_delay_write(chip);
		if (retval != STATUS_SUCCESS) {
			if (monitor_card_cd(chip, XD_CARD) == CD_NOT_EXIST) {
				rts51x_set_sense_type(chip, lun,
					       SENSE_TYPE_MEDIA_NOT_PRESENT);
				TRACE_RET(chip, STATUS_FAIL);
			}
			rts51x_set_sense_type(chip, lun,
				       SENSE_TYPE_MEDIA_UNRECOVER_READ_ERR);
			TRACE_RET(chip, retval);
		}

		old_blk = xd_get_l2p_tbl(chip, zone_no, log_off);
		if (old_blk == BLK_NOT_FOUND) {
			rts51x_set_sense_type(chip, lun,
				       SENSE_TYPE_MEDIA_UNRECOVER_READ_ERR);
			TRACE_RET(chip, STATUS_FAIL);
		}
	}

	RTS51X_DEBUGP("old_blk = 0x%x\n", old_blk);
	if (srb->sc_data_direction == DMA_TO_DEVICE)
		RTS51X_DEBUGP("new_blk = 0x%x\n", new_blk);

	while (total_sec_cnt) {
		if ((start_page + total_sec_cnt) > (xd_card->page_off + 1))
			end_page = xd_card->page_off + 1;
		else
			end_page = start_page + (u8) total_sec_cnt;
		page_cnt = end_page - start_page;
		if (srb->sc_data_direction == DMA_FROM_DEVICE) {
			retval = xd_read_multiple_pages(chip, old_blk, log_blk,
							start_page, end_page,
							buf, &ptr, &offset);
			if (retval != STATUS_SUCCESS) {
				rts51x_set_sense_type(chip, lun,
					SENSE_TYPE_MEDIA_UNRECOVER_READ_ERR);
				TRACE_RET(chip, STATUS_FAIL);
			}
		} else {
			retval =
			    xd_write_multiple_pages(chip, old_blk, new_blk,
						    log_blk, start_page,
						    end_page, buf, &ptr,
						    &offset);
			if (retval != STATUS_SUCCESS) {
				rts51x_set_sense_type(chip, lun,
					       SENSE_TYPE_MEDIA_WRITE_ERR);
				TRACE_RET(chip, STATUS_FAIL);
			}
		}

		total_sec_cnt -= page_cnt;

		if (total_sec_cnt == 0)
			break;

		log_blk++;
		zone_no = (int)(log_blk / 1000);
		log_off = (u16) (log_blk % 1000);

		if (xd_card->zone[zone_no].build_flag == 0) {
			retval = xd_build_l2p_tbl(chip, zone_no);
			if (retval != STATUS_SUCCESS) {
				chip->card_fail |= XD_CARD;
				rts51x_set_sense_type(chip, lun,
					       SENSE_TYPE_MEDIA_NOT_PRESENT);
				TRACE_RET(chip, retval);
			}
		}

		old_blk = xd_get_l2p_tbl(chip, zone_no, log_off);
		if (old_blk == BLK_NOT_FOUND) {
			if (srb->sc_data_direction == DMA_FROM_DEVICE) {
				rts51x_set_sense_type(chip, lun,
					SENSE_TYPE_MEDIA_UNRECOVER_READ_ERR);
			} else {
				rts51x_set_sense_type(chip, lun,
					       SENSE_TYPE_MEDIA_WRITE_ERR);
			}
			TRACE_RET(chip, STATUS_FAIL);
		}

		if (srb->sc_data_direction == DMA_TO_DEVICE) {
			new_blk = xd_get_unused_block(chip, zone_no);
			if (new_blk == BLK_NOT_FOUND) {
				rts51x_set_sense_type(chip, lun,
					       SENSE_TYPE_MEDIA_WRITE_ERR);
				TRACE_RET(chip, STATUS_FAIL);
			}
		}

		start_page = 0;
	}

	if ((srb->sc_data_direction == DMA_TO_DEVICE) &&
	    (end_page != (xd_card->page_off + 1))) {
		delay_write->delay_write_flag = 1;
		delay_write->old_phyblock = old_blk;
		delay_write->new_phyblock = new_blk;
		delay_write->logblock = log_blk;
		delay_write->pageoff = end_page;
	}

	scsi_set_resid(srb, 0);

	return STATUS_SUCCESS;
}

void rts51x_xd_free_l2p_tbl(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int i = 0;

	if (xd_card->zone != NULL) {
		for (i = 0; i < xd_card->zone_cnt; i++) {
			if (xd_card->zone[i].l2p_table != NULL) {
				vfree(xd_card->zone[i].l2p_table);
				xd_card->zone[i].l2p_table = NULL;
			}
			if (xd_card->zone[i].free_table != NULL) {
				vfree(xd_card->zone[i].free_table);
				xd_card->zone[i].free_table = NULL;
			}
		}
		vfree(xd_card->zone);
		xd_card->zone = NULL;
	}
}

void rts51x_xd_cleanup_work(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);

	if (xd_card->delay_write.delay_write_flag) {
		RTS51X_DEBUGP("xD: delay write\n");
		xd_delay_write(chip);
		xd_card->counter = 0;
	}
}

static int xd_power_off_card3v3(struct rts51x_chip *chip)
{
	int retval;

	rts51x_init_cmd(chip);

	rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_CLK_EN, XD_CLK_EN, 0);

	if (chip->asic_code)
		xd_pull_ctl_disable(chip);
	else
		rts51x_add_cmd(chip, WRITE_REG_CMD, FPGA_PULL_CTL, 0xFF, 0xDF);
	rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_OE, XD_OUTPUT_EN, 0);
	if (!chip->option.FT2_fast_mode) {
		rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PWR_CTL, POWER_MASK,
			       POWER_OFF);
		if (CHECK_PKG(chip, LQFP48)
		    || chip->option.rts5129_D3318_off_enable)
			rts51x_add_cmd(chip, WRITE_REG_CMD, CARD_PWR_CTL,
				       DV3318_AUTO_PWR_OFF, 0);
	}

	retval = rts51x_send_cmd(chip, MODE_C, 100);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	return STATUS_SUCCESS;
}

int rts51x_release_xd_card(struct rts51x_chip *chip)
{
	struct xd_info *xd_card = &(chip->xd_card);
	int retval;

	RTS51X_DEBUGP("rts51x_release_xd_card\n");

	chip->card_ready &= ~XD_CARD;
	chip->card_fail &= ~XD_CARD;
	chip->card_wp &= ~XD_CARD;

	xd_card->delay_write.delay_write_flag = 0;

	rts51x_xd_free_l2p_tbl(chip);

	rts51x_write_register(chip, SFSM_ED, HW_CMD_STOP, HW_CMD_STOP);

	retval = xd_power_off_card3v3(chip);
	if (retval != STATUS_SUCCESS)
		TRACE_RET(chip, retval);

	if (chip->asic_code && CHECK_PKG(chip, QFN24))
		wait_timeout(20);

	return STATUS_SUCCESS;
}