path: root/drivers/usb/storage/ene_ub6250.c

/*
 *
 * 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, write to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/slab.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>

#include <linux/firmware.h>

#include "usb.h"
#include "transport.h"
#include "protocol.h"
#include "debug.h"

MODULE_DESCRIPTION("Driver for ENE UB6250 reader");
MODULE_LICENSE("GPL");


/*
 * The table of devices
 */
#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
		    vendorName, productName, useProtocol, useTransport, \
		    initFunction, flags) \
{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
	.driver_info = (flags)|(USB_US_TYPE_STOR<<24) }

struct usb_device_id ene_ub6250_usb_ids[] = {
#	include "unusual_ene_ub6250.h"
	{ }		/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, ene_ub6250_usb_ids);

#undef UNUSUAL_DEV

/*
 * The flags table
 */
#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
		    vendor_name, product_name, use_protocol, use_transport, \
		    init_function, Flags) \
{ \
	.vendorName = vendor_name,	\
	.productName = product_name,	\
	.useProtocol = use_protocol,	\
	.useTransport = use_transport,	\
	.initFunction = init_function,	\
}

static struct us_unusual_dev ene_ub6250_unusual_dev_list[] = {
#	include "unusual_ene_ub6250.h"
	{ }		/* Terminating entry */
};

#undef UNUSUAL_DEV



/* ENE bin code len */
#define ENE_BIN_CODE_LEN    0x800
/* EnE HW Register */
#define REG_CARD_STATUS     0xFF83
#define REG_HW_TRAP1        0xFF89

/* SRB Status */
#define SS_SUCCESS                  0x00      /* No Sense */
#define SS_NOT_READY                0x02
#define SS_MEDIUM_ERR               0x03
#define SS_HW_ERR                   0x04
#define SS_ILLEGAL_REQUEST          0x05
#define SS_UNIT_ATTENTION           0x06

/* ENE Load FW Pattern */
#define SD_INIT1_PATTERN   1
#define SD_INIT2_PATTERN   2
#define SD_RW_PATTERN      3
#define MS_INIT_PATTERN    4
#define MSP_RW_PATTERN     5
#define MS_RW_PATTERN      6
#define SM_INIT_PATTERN    7
#define SM_RW_PATTERN      8

#define FDIR_WRITE         0
#define FDIR_READ          1


struct SD_STATUS {
	u8    Insert:1;
	u8    Ready:1;
	u8    MediaChange:1;
	u8    IsMMC:1;
	u8    HiCapacity:1;
	u8    HiSpeed:1;
	u8    WtP:1;
	u8    Reserved:1;
};

struct MS_STATUS {
	u8    Insert:1;
	u8    Ready:1;
	u8    MediaChange:1;
	u8    IsMSPro:1;
	u8    IsMSPHG:1;
	u8    Reserved1:1;
	u8    WtP:1;
	u8    Reserved2:1;
};

struct SM_STATUS {
	u8    Insert:1;
	u8    Ready:1;
	u8    MediaChange:1;
	u8    Reserved:3;
	u8    WtP:1;
	u8    IsMS:1;
};


/* SD Block Length */
/* 2^9 = 512 Bytes, The HW maximum read/write data length */
#define SD_BLOCK_LEN  9

struct ene_ub6250_info {
	/* for 6250 code */
	struct SD_STATUS	SD_Status;
	struct MS_STATUS	MS_Status;
	struct SM_STATUS	SM_Status;

	/* ----- SD Control Data ---------------- */
	/*SD_REGISTER SD_Regs; */
	u16		SD_Block_Mult;
	u8		SD_READ_BL_LEN;
	u16		SD_C_SIZE;
	u8		SD_C_SIZE_MULT;

	/* SD/MMC New spec. */
	u8		SD_SPEC_VER;
	u8		SD_CSD_VER;
	u8		SD20_HIGH_CAPACITY;
	u32		HC_C_SIZE;
	u8		MMC_SPEC_VER;
	u8		MMC_BusWidth;
	u8		MMC_HIGH_CAPACITY;

	/*----- MS Control Data ---------------- */
	bool		MS_SWWP;
	u32		MSP_TotalBlock;
	/*MS_LibControl       MS_Lib;*/
	bool		MS_IsRWPage;
	u16		MS_Model;

	/*----- SM Control Data ---------------- */
	u8		SM_DeviceID;
	u8		SM_CardID;

	unsigned char	*testbuf;
	u8		BIN_FLAG;
	u32		bl_num;
	int		SrbStatus;

	/*------Power Managerment ---------------*/
	bool		Power_IsResum;
};

static int ene_sd_init(struct us_data *us);
static int ene_load_bincode(struct us_data *us, unsigned char flag);

static void ene_ub6250_info_destructor(void *extra)
{
	if (!extra)
		return;
}

static int ene_send_scsi_cmd(struct us_data *us, u8 fDir, void *buf, int use_sg)
{
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;

	int result;
	unsigned int residue;
	unsigned int cswlen = 0, partial = 0;
	unsigned int transfer_length = bcb->DataTransferLength;

	/* US_DEBUGP("transport --- ene_send_scsi_cmd\n"); */
	/* send cmd to out endpoint */
	result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
					    bcb, US_BULK_CB_WRAP_LEN, NULL);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("send cmd to out endpoint fail ---\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (buf) {
		unsigned int pipe = fDir;

		if (fDir  == FDIR_READ)
			pipe = us->recv_bulk_pipe;
		else
			pipe = us->send_bulk_pipe;

		/* Bulk */
		if (use_sg) {
			result = usb_stor_bulk_srb(us, pipe, us->srb);
		} else {
			result = usb_stor_bulk_transfer_sg(us, pipe, buf,
						transfer_length, 0, &partial);
		}
		if (result != USB_STOR_XFER_GOOD) {
			US_DEBUGP("data transfer fail ---\n");
			return USB_STOR_TRANSPORT_ERROR;
		}
	}

	/* Get CSW for device status */
	result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
					    US_BULK_CS_WRAP_LEN, &cswlen);

	if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
		US_DEBUGP("Received 0-length CSW; retrying...\n");
		result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
					    bcs, US_BULK_CS_WRAP_LEN, &cswlen);
	}

	if (result == USB_STOR_XFER_STALLED) {
		/* get the status again */
		US_DEBUGP("Attempting to get CSW (2nd try)...\n");
		result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
						bcs, US_BULK_CS_WRAP_LEN, NULL);
	}

	if (result != USB_STOR_XFER_GOOD)
		return USB_STOR_TRANSPORT_ERROR;

	/* check bulk status */
	residue = le32_to_cpu(bcs->Residue);

	/* try to compute the actual residue, based on how much data
	 * was really transferred and what the device tells us */
	if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) {
		residue = min(residue, transfer_length);
		if (us->srb != NULL)
			scsi_set_resid(us->srb, max(scsi_get_resid(us->srb),
								(int)residue));
	}

	if (bcs->Status != US_BULK_STAT_OK)
		return USB_STOR_TRANSPORT_ERROR;

	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_test_unit_ready(struct us_data *us, struct scsi_cmnd *srb)
{
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	if (info->SD_Status.Insert && info->SD_Status.Ready)
		return USB_STOR_TRANSPORT_GOOD;
	else {
		ene_sd_init(us);
		return USB_STOR_TRANSPORT_GOOD;
	}

	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_inquiry(struct us_data *us, struct scsi_cmnd *srb)
{
	unsigned char data_ptr[36] = {
		0x00, 0x80, 0x02, 0x00, 0x1F, 0x00, 0x00, 0x00, 0x55,
		0x53, 0x42, 0x32, 0x2E, 0x30, 0x20, 0x20, 0x43, 0x61,
		0x72, 0x64, 0x52, 0x65, 0x61, 0x64, 0x65, 0x72, 0x20,
		0x20, 0x20, 0x20, 0x20, 0x20, 0x30, 0x31, 0x30, 0x30 };

	usb_stor_set_xfer_buf(data_ptr, 36, srb);
	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_mode_sense(struct us_data *us, struct scsi_cmnd *srb)
{
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
	unsigned char mediaNoWP[12] = {
		0x0b, 0x00, 0x00, 0x08, 0x00, 0x00,
		0x71, 0xc0, 0x00, 0x00, 0x02, 0x00 };
	unsigned char mediaWP[12]   = {
		0x0b, 0x00, 0x80, 0x08, 0x00, 0x00,
		0x71, 0xc0, 0x00, 0x00, 0x02, 0x00 };

	if (info->SD_Status.WtP)
		usb_stor_set_xfer_buf(mediaWP, 12, srb);
	else
		usb_stor_set_xfer_buf(mediaNoWP, 12, srb);


	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_read_capacity(struct us_data *us, struct scsi_cmnd *srb)
{
	u32   bl_num;
	u16    bl_len;
	unsigned int offset = 0;
	unsigned char    buf[8];
	struct scatterlist *sg = NULL;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	US_DEBUGP("sd_scsi_read_capacity\n");
	if (info->SD_Status.HiCapacity) {
		bl_len = 0x200;
		if (info->SD_Status.IsMMC)
			bl_num = info->HC_C_SIZE-1;
		else
			bl_num = (info->HC_C_SIZE + 1) * 1024 - 1;
	} else {
		bl_len = 1<<(info->SD_READ_BL_LEN);
		bl_num = info->SD_Block_Mult * (info->SD_C_SIZE + 1)
				* (1 << (info->SD_C_SIZE_MULT + 2)) - 1;
	}
	info->bl_num = bl_num;
	US_DEBUGP("bl_len = %x\n", bl_len);
	US_DEBUGP("bl_num = %x\n", bl_num);

	/*srb->request_bufflen = 8; */
	buf[0] = (bl_num >> 24) & 0xff;
	buf[1] = (bl_num >> 16) & 0xff;
	buf[2] = (bl_num >> 8) & 0xff;
	buf[3] = (bl_num >> 0) & 0xff;
	buf[4] = (bl_len >> 24) & 0xff;
	buf[5] = (bl_len >> 16) & 0xff;
	buf[6] = (bl_len >> 8) & 0xff;
	buf[7] = (bl_len >> 0) & 0xff;

	usb_stor_access_xfer_buf(buf, 8, srb, &sg, &offset, TO_XFER_BUF);

	return USB_STOR_TRANSPORT_GOOD;
}

static int sd_scsi_read(struct us_data *us, struct scsi_cmnd *srb)
{
	int result;
	unsigned char *cdb = srb->cmnd;
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	u32 bn = ((cdb[2] << 24) & 0xff000000) | ((cdb[3] << 16) & 0x00ff0000) |
		 ((cdb[4] << 8) & 0x0000ff00) | ((cdb[5] << 0) & 0x000000ff);
	u16 blen = ((cdb[7] << 8) & 0xff00) | ((cdb[8] << 0) & 0x00ff);
	u32 bnByte = bn * 0x200;
	u32 blenByte = blen * 0x200;

	if (bn > info->bl_num)
		return USB_STOR_TRANSPORT_ERROR;

	result = ene_load_bincode(us, SD_RW_PATTERN);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Load SD RW pattern Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (info->SD_Status.HiCapacity)
		bnByte = bn;

	/* set up the command wrapper */
	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength = blenByte;
	bcb->Flags  = 0x80;
	bcb->CDB[0] = 0xF1;
	bcb->CDB[5] = (unsigned char)(bnByte);
	bcb->CDB[4] = (unsigned char)(bnByte>>8);
	bcb->CDB[3] = (unsigned char)(bnByte>>16);
	bcb->CDB[2] = (unsigned char)(bnByte>>24);

	result = ene_send_scsi_cmd(us, FDIR_READ, scsi_sglist(srb), 1);
	return result;
}

static int sd_scsi_write(struct us_data *us, struct scsi_cmnd *srb)
{
	int result;
	unsigned char *cdb = srb->cmnd;
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	u32 bn = ((cdb[2] << 24) & 0xff000000) | ((cdb[3] << 16) & 0x00ff0000) |
		 ((cdb[4] << 8) & 0x0000ff00) | ((cdb[5] << 0) & 0x000000ff);
	u16 blen = ((cdb[7] << 8) & 0xff00) | ((cdb[8] << 0) & 0x00ff);
	u32 bnByte = bn * 0x200;
	u32 blenByte = blen * 0x200;

	if (bn > info->bl_num)
		return USB_STOR_TRANSPORT_ERROR;

	result = ene_load_bincode(us, SD_RW_PATTERN);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Load SD RW pattern Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (info->SD_Status.HiCapacity)
		bnByte = bn;

	/* set up the command wrapper */
	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength = blenByte;
	bcb->Flags  = 0x00;
	bcb->CDB[0] = 0xF0;
	bcb->CDB[5] = (unsigned char)(bnByte);
	bcb->CDB[4] = (unsigned char)(bnByte>>8);
	bcb->CDB[3] = (unsigned char)(bnByte>>16);
	bcb->CDB[2] = (unsigned char)(bnByte>>24);

	result = ene_send_scsi_cmd(us, FDIR_WRITE, scsi_sglist(srb), 1);
	return result;
}

static int ene_get_card_type(struct us_data *us, u16 index, void *buf)
{
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	int result;

	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength	= 0x01;
	bcb->Flags			= 0x80;
	bcb->CDB[0]			= 0xED;
	bcb->CDB[2]			= (unsigned char)(index>>8);
	bcb->CDB[3]			= (unsigned char)index;

	result = ene_send_scsi_cmd(us, FDIR_READ, buf, 0);
	return result;
}

static int ene_get_card_status(struct us_data *us, u8 *buf)
{
	u16 tmpreg;
	u32 reg4b;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	/*US_DEBUGP("transport --- ENE_ReadSDReg\n");*/
	reg4b = *(u32 *)&buf[0x18];
	info->SD_READ_BL_LEN = (u8)((reg4b >> 8) & 0x0f);

	tmpreg = (u16) reg4b;
	reg4b = *(u32 *)(&buf[0x14]);
	if (info->SD_Status.HiCapacity && !info->SD_Status.IsMMC)
		info->HC_C_SIZE = (reg4b >> 8) & 0x3fffff;

	info->SD_C_SIZE = ((tmpreg & 0x03) << 10) | (u16)(reg4b >> 22);
	info->SD_C_SIZE_MULT = (u8)(reg4b >> 7)  & 0x07;
	if (info->SD_Status.HiCapacity && info->SD_Status.IsMMC)
		info->HC_C_SIZE = *(u32 *)(&buf[0x100]);

	if (info->SD_READ_BL_LEN > SD_BLOCK_LEN) {
		info->SD_Block_Mult = 1 << (info->SD_READ_BL_LEN-SD_BLOCK_LEN);
		info->SD_READ_BL_LEN = SD_BLOCK_LEN;
	} else {
		info->SD_Block_Mult = 1;
	}

	return USB_STOR_TRANSPORT_GOOD;
}

static int ene_load_bincode(struct us_data *us, unsigned char flag)
{
	int err;
	char *fw_name = NULL;
	unsigned char *buf = NULL;
	const struct firmware *sd_fw = NULL;
	int result = USB_STOR_TRANSPORT_ERROR;
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	if (info->BIN_FLAG == flag)
		return USB_STOR_TRANSPORT_GOOD;

	buf = kmalloc(ENE_BIN_CODE_LEN, GFP_KERNEL);
	if (buf == NULL)
		return USB_STOR_TRANSPORT_ERROR;

	switch (flag) {
	/* For SD */
	case SD_INIT1_PATTERN:
		US_DEBUGP("SD_INIT1_PATTERN\n");
		fw_name = "ene-ub6250/sd_init1.bin";
		break;
	case SD_INIT2_PATTERN:
		US_DEBUGP("SD_INIT2_PATTERN\n");
		fw_name = "ene-ub6250/sd_init2.bin";
		break;
	case SD_RW_PATTERN:
		US_DEBUGP("SD_RDWR_PATTERN\n");
		fw_name = "ene-ub6250/sd_rdwr.bin";
		break;
	default:
		US_DEBUGP("----------- Unknown PATTERN ----------\n");
		goto nofw;
	}

	err = request_firmware(&sd_fw, fw_name, &us->pusb_dev->dev);
	if (err) {
		US_DEBUGP("load firmware %s failed\n", fw_name);
		goto nofw;
	}
	buf = kmalloc(sd_fw->size, GFP_KERNEL);
	if (buf == NULL) {
		US_DEBUGP("Malloc memory for fireware failed!\n");
		goto nofw;
	}
	memcpy(buf, sd_fw->data, sd_fw->size);
	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength = sd_fw->size;
	bcb->Flags = 0x00;
	bcb->CDB[0] = 0xEF;

	result = ene_send_scsi_cmd(us, FDIR_WRITE, buf, 0);
	info->BIN_FLAG = flag;
	kfree(buf);

nofw:
	if (sd_fw != NULL) {
		release_firmware(sd_fw);
		sd_fw = NULL;
	}

	return result;
}

static int ene_sd_init(struct us_data *us)
{
	int result;
	u8  buf[0x200];
	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;

	US_DEBUGP("transport --- ENE_SDInit\n");
	/* SD Init Part-1 */
	result = ene_load_bincode(us, SD_INIT1_PATTERN);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Load SD Init Code Part-1 Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->Flags = 0x80;
	bcb->CDB[0] = 0xF2;

	result = ene_send_scsi_cmd(us, FDIR_READ, NULL, 0);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Exection SD Init Code Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	/* SD Init Part-2 */
	result = ene_load_bincode(us, SD_INIT2_PATTERN);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Load SD Init Code Part-2 Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	memset(bcb, 0, sizeof(struct bulk_cb_wrap));
	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
	bcb->DataTransferLength = 0x200;
	bcb->Flags              = 0x80;
	bcb->CDB[0]             = 0xF1;

	result = ene_send_scsi_cmd(us, FDIR_READ, &buf, 0);
	if (result != USB_STOR_XFER_GOOD) {
		US_DEBUGP("Exection SD Init Code Fail !!\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	info->SD_Status =  *(struct SD_STATUS *)&buf[0];
	if (info->SD_Status.Insert && info->SD_Status.Ready) {
		ene_get_card_status(us, (unsigned char *)&buf);
		US_DEBUGP("Insert     = %x\n", info->SD_Status.Insert);
		US_DEBUGP("Ready      = %x\n", info->SD_Status.Ready);
		US_DEBUGP("IsMMC      = %x\n", info->SD_Status.IsMMC);
		US_DEBUGP("HiCapacity = %x\n", info->SD_Status.HiCapacity);
		US_DEBUGP("HiSpeed    = %x\n", info->SD_Status.HiSpeed);
		US_DEBUGP("WtP        = %x\n", info->SD_Status.WtP);
	} else {
		US_DEBUGP("SD Card Not Ready --- %x\n", buf[0]);
		return USB_STOR_TRANSPORT_ERROR;
	}
	return USB_STOR_TRANSPORT_GOOD;
}


static int ene_init(struct us_data *us)
{
	int result;
	u8  misc_reg03 = 0;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);

	result = ene_get_card_type(us, REG_CARD_STATUS, &misc_reg03);
	if (result != USB_STOR_XFER_GOOD)
		return USB_STOR_TRANSPORT_ERROR;

	if (misc_reg03 & 0x01) {
		if (!info->SD_Status.Ready) {
			result = ene_sd_init(us);
			if (result != USB_STOR_XFER_GOOD)
				return USB_STOR_TRANSPORT_ERROR;
		}
	}

	return result;
}

/*----- sd_scsi_irp() ---------*/
static int sd_scsi_irp(struct us_data *us, struct scsi_cmnd *srb)
{
	int    result;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)us->extra;

	info->SrbStatus = SS_SUCCESS;
	switch (srb->cmnd[0]) {
	case TEST_UNIT_READY:
		result = sd_scsi_test_unit_ready(us, srb);
		break; /* 0x00 */
	case INQUIRY:
		result = sd_scsi_inquiry(us, srb);
		break; /* 0x12 */
	case MODE_SENSE:
		result = sd_scsi_mode_sense(us, srb);
		break; /* 0x1A */
	/*
	case START_STOP:
		result = SD_SCSI_Start_Stop(us, srb);
		break; //0x1B
	*/
	case READ_CAPACITY:
		result = sd_scsi_read_capacity(us, srb);
		break; /* 0x25 */
	case READ_10:
		result = sd_scsi_read(us, srb);
		break; /* 0x28 */
	case WRITE_10:
		result = sd_scsi_write(us, srb);
		break; /* 0x2A */
	default:
		info->SrbStatus = SS_ILLEGAL_REQUEST;
		result = USB_STOR_TRANSPORT_FAILED;
		break;
	}
	return result;
}

static int ene_transport(struct scsi_cmnd *srb, struct us_data *us)
{
	int result = 0;
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);

	/*US_DEBUG(usb_stor_show_command(srb)); */
	scsi_set_resid(srb, 0);
	if (unlikely(!info->SD_Status.Ready))
		result = ene_init(us);
	else
		result = sd_scsi_irp(us, srb);

	return 0;
}


static int ene_ub6250_probe(struct usb_interface *intf,
			 const struct usb_device_id *id)
{
	int result;
	u8  misc_reg03 = 0;
	struct us_data *us;

	result = usb_stor_probe1(&us, intf, id,
		   (id - ene_ub6250_usb_ids) + ene_ub6250_unusual_dev_list);
	if (result)
		return result;

	/* FIXME: where should the code alloc extra buf ? */
	if (!us->extra) {
		us->extra = kzalloc(sizeof(struct ene_ub6250_info), GFP_KERNEL);
		if (!us->extra)
			return -ENOMEM;
		us->extra_destructor = ene_ub6250_info_destructor;
	}

	us->transport_name = "ene_ub6250";
	us->transport = ene_transport;
	us->max_lun = 0;

	result = usb_stor_probe2(us);
	if (result)
		return result;

	/* probe card type */
	result = ene_get_card_type(us, REG_CARD_STATUS, &misc_reg03);
	if (result != USB_STOR_XFER_GOOD) {
		usb_stor_disconnect(intf);
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (!(misc_reg03 & 0x01)) {
		result = -ENODEV;
		printk(KERN_NOTICE "ums_eneub6250: The driver only supports SD\
		card. To use SM/MS card, please build driver/stagging/keucr\n");
		usb_stor_disconnect(intf);
	}

	return result;
}


#ifdef CONFIG_PM

static int ene_ub6250_resume(struct usb_interface *iface)
{
	u8 tmp = 0;
	struct us_data *us = usb_get_intfdata(iface);
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);

	mutex_lock(&us->dev_mutex);

	US_DEBUGP("%s\n", __func__);
	if (us->suspend_resume_hook)
		(us->suspend_resume_hook)(us, US_RESUME);

	mutex_unlock(&us->dev_mutex);

	info->Power_IsResum = true;
	/*info->SD_Status.Ready = 0; */
	info->SD_Status = *(struct SD_STATUS *)&tmp;
	info->MS_Status = *(struct MS_STATUS *)&tmp;
	info->SM_Status = *(struct SM_STATUS *)&tmp;

	return 0;
}

static int ene_ub6250_reset_resume(struct usb_interface *iface)
{
	u8 tmp = 0;
	struct us_data *us = usb_get_intfdata(iface);
	struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);
	US_DEBUGP("%s\n", __func__);
	/* Report the reset to the SCSI core */
	usb_stor_reset_resume(iface);

	/* FIXME: Notify the subdrivers that they need to reinitialize
	 * the device */
	info->Power_IsResum = true;
	/*info->SD_Status.Ready = 0; */
	info->SD_Status = *(struct SD_STATUS *)&tmp;
	info->MS_Status = *(struct MS_STATUS *)&tmp;
	info->SM_Status = *(struct SM_STATUS *)&tmp;

	return 0;
}

#else

#define ene_ub6250_resume		NULL
#define ene_ub6250_reset_resume		NULL

#endif

static struct usb_driver ene_ub6250_driver = {
	.name =		"ums_eneub6250",
	.probe =	ene_ub6250_probe,
	.disconnect =	usb_stor_disconnect,
	.suspend =	usb_stor_suspend,
	.resume =	ene_ub6250_resume,
	.reset_resume =	ene_ub6250_reset_resume,
	.pre_reset =	usb_stor_pre_reset,
	.post_reset =	usb_stor_post_reset,
	.id_table =	ene_ub6250_usb_ids,
	.soft_unbind =	1,
};

static int __init ene_ub6250_init(void)
{
	return usb_register(&ene_ub6250_driver);
}

static void __exit ene_ub6250_exit(void)
{
	usb_deregister(&ene_ub6250_driver);
}

module_init(ene_ub6250_init);
module_exit(ene_ub6250_exit);