Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1070 insertions, 0 deletions

diff --git a/drivers/usb/storage/realtek_cr.c b/drivers/usb/storage/realtek_cr.c
new file mode 100644
index 000000000..0c423916d
--- /dev/null
+++ b/drivers/usb/storage/realtek_cr.c
@@ -0,0 +1,1070 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for Realtek RTS51xx USB card reader
+ *
+ * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * Author:
+ *   wwang (wei_wang@realsil.com.cn)
+ *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kthread.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <linux/cdrom.h>
+
+#include <linux/usb.h>
+#include <linux/slab.h>
+#include <linux/usb_usual.h>
+
+#include "usb.h"
+#include "transport.h"
+#include "protocol.h"
+#include "debug.h"
+#include "scsiglue.h"
+
+#define DRV_NAME "ums-realtek"
+
+MODULE_DESCRIPTION("Driver for Realtek USB Card Reader");
+MODULE_AUTHOR("wwang <wei_wang@realsil.com.cn>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(USB_STORAGE);
+
+static int auto_delink_en = 1;
+module_param(auto_delink_en, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(auto_delink_en, "auto delink mode (0=firmware, 1=software [default])");
+
+#ifdef CONFIG_REALTEK_AUTOPM
+static int ss_en = 1;
+module_param(ss_en, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(ss_en, "enable selective suspend");
+
+static int ss_delay = 50;
+module_param(ss_delay, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(ss_delay,
+		 "seconds to delay before entering selective suspend");
+
+enum RTS51X_STAT {
+	RTS51X_STAT_INIT,
+	RTS51X_STAT_IDLE,
+	RTS51X_STAT_RUN,
+	RTS51X_STAT_SS
+};
+
+#define POLLING_INTERVAL	50
+
+#define rts51x_set_stat(chip, stat)	\
+	((chip)->state = (enum RTS51X_STAT)(stat))
+#define rts51x_get_stat(chip)		((chip)->state)
+
+#define SET_LUN_READY(chip, lun)	((chip)->lun_ready |= ((u8)1 << (lun)))
+#define CLR_LUN_READY(chip, lun)	((chip)->lun_ready &= ~((u8)1 << (lun)))
+#define TST_LUN_READY(chip, lun)	((chip)->lun_ready & ((u8)1 << (lun)))
+
+#endif
+
+struct rts51x_status {
+	u16 vid;
+	u16 pid;
+	u8 cur_lun;
+	u8 card_type;
+	u8 total_lun;
+	u16 fw_ver;
+	u8 phy_exist;
+	u8 multi_flag;
+	u8 multi_card;
+	u8 log_exist;
+	union {
+		u8 detailed_type1;
+		u8 detailed_type2;
+	} detailed_type;
+	u8 function[2];
+};
+
+struct rts51x_chip {
+	u16 vendor_id;
+	u16 product_id;
+	char max_lun;
+
+	struct rts51x_status *status;
+	int status_len;
+
+	u32 flag;
+	struct us_data *us;
+
+#ifdef CONFIG_REALTEK_AUTOPM
+	struct timer_list rts51x_suspend_timer;
+	unsigned long timer_expires;
+	int pwr_state;
+	u8 lun_ready;
+	enum RTS51X_STAT state;
+	int support_auto_delink;
+#endif
+	/* used to back up the protocol chosen in probe1 phase */
+	proto_cmnd proto_handler_backup;
+};
+
+/* flag definition */
+#define FLIDX_AUTO_DELINK		0x01
+
+#define SCSI_LUN(srb)			((srb)->device->lun)
+
+/* Bit Operation */
+#define SET_BIT(data, idx)		((data) |= 1 << (idx))
+#define CLR_BIT(data, idx)		((data) &= ~(1 << (idx)))
+#define CHK_BIT(data, idx)		((data) & (1 << (idx)))
+
+#define SET_AUTO_DELINK(chip)		((chip)->flag |= FLIDX_AUTO_DELINK)
+#define CLR_AUTO_DELINK(chip)		((chip)->flag &= ~FLIDX_AUTO_DELINK)
+#define CHK_AUTO_DELINK(chip)		((chip)->flag & FLIDX_AUTO_DELINK)
+
+#define RTS51X_GET_VID(chip)		((chip)->vendor_id)
+#define RTS51X_GET_PID(chip)		((chip)->product_id)
+
+#define VENDOR_ID(chip)			((chip)->status[0].vid)
+#define PRODUCT_ID(chip)		((chip)->status[0].pid)
+#define FW_VERSION(chip)		((chip)->status[0].fw_ver)
+#define STATUS_LEN(chip)		((chip)->status_len)
+
+#define STATUS_SUCCESS		0
+#define STATUS_FAIL		1
+
+/* Check card reader function */
+#define SUPPORT_DETAILED_TYPE1(chip)	\
+		CHK_BIT((chip)->status[0].function[0], 1)
+#define SUPPORT_OT(chip)		\
+		CHK_BIT((chip)->status[0].function[0], 2)
+#define SUPPORT_OC(chip)		\
+		CHK_BIT((chip)->status[0].function[0], 3)
+#define SUPPORT_AUTO_DELINK(chip)	\
+		CHK_BIT((chip)->status[0].function[0], 4)
+#define SUPPORT_SDIO(chip)		\
+		CHK_BIT((chip)->status[0].function[1], 0)
+#define SUPPORT_DETAILED_TYPE2(chip)	\
+		CHK_BIT((chip)->status[0].function[1], 1)
+
+#define CHECK_PID(chip, pid)		(RTS51X_GET_PID(chip) == (pid))
+#define CHECK_FW_VER(chip, fw_ver)	(FW_VERSION(chip) == (fw_ver))
+#define CHECK_ID(chip, pid, fw_ver)	\
+		(CHECK_PID((chip), (pid)) && CHECK_FW_VER((chip), (fw_ver)))
+
+static int init_realtek_cr(struct us_data *us);
+
+/*
+ * 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) \
+}
+
+static const struct usb_device_id realtek_cr_ids[] = {
+#	include "unusual_realtek.h"
+	{}			/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, realtek_cr_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 realtek_cr_unusual_dev_list[] = {
+#	include "unusual_realtek.h"
+	{}			/* Terminating entry */
+};
+
+#undef UNUSUAL_DEV
+
+static int rts51x_bulk_transport(struct us_data *us, u8 lun,
+				 u8 *cmd, int cmd_len, u8 *buf, int buf_len,
+				 enum dma_data_direction dir, int *act_len)
+{
+	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;
+	unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
+
+	/* set up the command wrapper */
+	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
+	bcb->DataTransferLength = cpu_to_le32(buf_len);
+	bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
+	bcb->Tag = ++us->tag;
+	bcb->Lun = lun;
+	bcb->Length = cmd_len;
+
+	/* copy the command payload */
+	memset(bcb->CDB, 0, sizeof(bcb->CDB));
+	memcpy(bcb->CDB, cmd, bcb->Length);
+
+	/* send it to out endpoint */
+	result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
+					    bcb, cbwlen, NULL);
+	if (result != USB_STOR_XFER_GOOD)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	/* DATA STAGE */
+	/* send/receive data payload, if there is any */
+
+	if (buf && buf_len) {
+		unsigned int pipe = (dir == DMA_FROM_DEVICE) ?
+		    us->recv_bulk_pipe : us->send_bulk_pipe;
+		result = usb_stor_bulk_transfer_buf(us, pipe,
+						    buf, buf_len, NULL);
+		if (result == USB_STOR_XFER_ERROR)
+			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_GOOD)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	/* check bulk status */
+	if (bcs->Signature != cpu_to_le32(US_BULK_CS_SIGN)) {
+		usb_stor_dbg(us, "Signature mismatch: got %08X, expecting %08X\n",
+			     le32_to_cpu(bcs->Signature), US_BULK_CS_SIGN);
+		return USB_STOR_TRANSPORT_ERROR;
+	}
+
+	residue = bcs->Residue;
+	if (bcs->Tag != us->tag)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	/*
+	 * try to compute the actual residue, based on how much data
+	 * was really transferred and what the device tells us
+	 */
+	if (residue)
+		residue = residue < buf_len ? residue : buf_len;
+
+	if (act_len)
+		*act_len = buf_len - residue;
+
+	/* based on the status code, we report good or bad */
+	switch (bcs->Status) {
+	case US_BULK_STAT_OK:
+		/* command good -- note that data could be short */
+		return USB_STOR_TRANSPORT_GOOD;
+
+	case US_BULK_STAT_FAIL:
+		/* command failed */
+		return USB_STOR_TRANSPORT_FAILED;
+
+	case US_BULK_STAT_PHASE:
+		/*
+		 * phase error -- note that a transport reset will be
+		 * invoked by the invoke_transport() function
+		 */
+		return USB_STOR_TRANSPORT_ERROR;
+	}
+
+	/* we should never get here, but if we do, we're in trouble */
+	return USB_STOR_TRANSPORT_ERROR;
+}
+
+static int rts51x_bulk_transport_special(struct us_data *us, u8 lun,
+				 u8 *cmd, int cmd_len, u8 *buf, int buf_len,
+				 enum dma_data_direction dir, int *act_len)
+{
+	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 cswlen;
+	unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
+
+	/* set up the command wrapper */
+	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
+	bcb->DataTransferLength = cpu_to_le32(buf_len);
+	bcb->Flags = (dir == DMA_FROM_DEVICE) ? US_BULK_FLAG_IN : 0;
+	bcb->Tag = ++us->tag;
+	bcb->Lun = lun;
+	bcb->Length = cmd_len;
+
+	/* copy the command payload */
+	memset(bcb->CDB, 0, sizeof(bcb->CDB));
+	memcpy(bcb->CDB, cmd, bcb->Length);
+
+	/* send it to out endpoint */
+	result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
+				bcb, cbwlen, NULL);
+	if (result != USB_STOR_XFER_GOOD)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	/* DATA STAGE */
+	/* send/receive data payload, if there is any */
+
+	if (buf && buf_len) {
+		unsigned int pipe = (dir == DMA_FROM_DEVICE) ?
+				us->recv_bulk_pipe : us->send_bulk_pipe;
+		result = usb_stor_bulk_transfer_buf(us, pipe,
+				buf, buf_len, NULL);
+		if (result == USB_STOR_XFER_ERROR)
+			return USB_STOR_TRANSPORT_ERROR;
+	}
+
+	/* get CSW for device status */
+	result = usb_bulk_msg(us->pusb_dev, us->recv_bulk_pipe, bcs,
+			US_BULK_CS_WRAP_LEN, &cswlen, 250);
+	return result;
+}
+
+/* Determine what the maximum LUN supported is */
+static int rts51x_get_max_lun(struct us_data *us)
+{
+	int result;
+
+	/* issue the command */
+	us->iobuf[0] = 0;
+	result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
+				      US_BULK_GET_MAX_LUN,
+				      USB_DIR_IN | USB_TYPE_CLASS |
+				      USB_RECIP_INTERFACE,
+				      0, us->ifnum, us->iobuf, 1, 10 * HZ);
+
+	usb_stor_dbg(us, "GetMaxLUN command result is %d, data is %d\n",
+		     result, us->iobuf[0]);
+
+	/* if we have a successful request, return the result */
+	if (result > 0)
+		return us->iobuf[0];
+
+	return 0;
+}
+
+static int rts51x_read_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
+{
+	int retval;
+	u8 cmnd[12] = { 0 };
+	u8 *buf;
+
+	buf = kmalloc(len, GFP_NOIO);
+	if (buf == NULL)
+		return -ENOMEM;
+
+	usb_stor_dbg(us, "addr = 0x%x, len = %d\n", addr, len);
+
+	cmnd[0] = 0xF0;
+	cmnd[1] = 0x0D;
+	cmnd[2] = (u8) (addr >> 8);
+	cmnd[3] = (u8) addr;
+	cmnd[4] = (u8) (len >> 8);
+	cmnd[5] = (u8) len;
+
+	retval = rts51x_bulk_transport(us, 0, cmnd, 12,
+				       buf, len, DMA_FROM_DEVICE, NULL);
+	if (retval != USB_STOR_TRANSPORT_GOOD) {
+		kfree(buf);
+		return -EIO;
+	}
+
+	memcpy(data, buf, len);
+	kfree(buf);
+	return 0;
+}
+
+static int rts51x_write_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
+{
+	int retval;
+	u8 cmnd[12] = { 0 };
+	u8 *buf;
+
+	buf = kmemdup(data, len, GFP_NOIO);
+	if (buf == NULL)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	usb_stor_dbg(us, "addr = 0x%x, len = %d\n", addr, len);
+
+	cmnd[0] = 0xF0;
+	cmnd[1] = 0x0E;
+	cmnd[2] = (u8) (addr >> 8);
+	cmnd[3] = (u8) addr;
+	cmnd[4] = (u8) (len >> 8);
+	cmnd[5] = (u8) len;
+
+	retval = rts51x_bulk_transport(us, 0, cmnd, 12,
+				       buf, len, DMA_TO_DEVICE, NULL);
+	kfree(buf);
+	if (retval != USB_STOR_TRANSPORT_GOOD)
+		return -EIO;
+
+	return 0;
+}
+
+static int rts51x_read_status(struct us_data *us,
+			      u8 lun, u8 *status, int len, int *actlen)
+{
+	int retval;
+	u8 cmnd[12] = { 0 };
+	u8 *buf;
+
+	buf = kmalloc(len, GFP_NOIO);
+	if (buf == NULL)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	usb_stor_dbg(us, "lun = %d\n", lun);
+
+	cmnd[0] = 0xF0;
+	cmnd[1] = 0x09;
+
+	retval = rts51x_bulk_transport(us, lun, cmnd, 12,
+				       buf, len, DMA_FROM_DEVICE, actlen);
+	if (retval != USB_STOR_TRANSPORT_GOOD) {
+		kfree(buf);
+		return -EIO;
+	}
+
+	memcpy(status, buf, len);
+	kfree(buf);
+	return 0;
+}
+
+static int rts51x_check_status(struct us_data *us, u8 lun)
+{
+	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
+	int retval;
+	u8 buf[16];
+
+	retval = rts51x_read_status(us, lun, buf, 16, &(chip->status_len));
+	if (retval != STATUS_SUCCESS)
+		return -EIO;
+
+	usb_stor_dbg(us, "chip->status_len = %d\n", chip->status_len);
+
+	chip->status[lun].vid = ((u16) buf[0] << 8) | buf[1];
+	chip->status[lun].pid = ((u16) buf[2] << 8) | buf[3];
+	chip->status[lun].cur_lun = buf[4];
+	chip->status[lun].card_type = buf[5];
+	chip->status[lun].total_lun = buf[6];
+	chip->status[lun].fw_ver = ((u16) buf[7] << 8) | buf[8];
+	chip->status[lun].phy_exist = buf[9];
+	chip->status[lun].multi_flag = buf[10];
+	chip->status[lun].multi_card = buf[11];
+	chip->status[lun].log_exist = buf[12];
+	if (chip->status_len == 16) {
+		chip->status[lun].detailed_type.detailed_type1 = buf[13];
+		chip->status[lun].function[0] = buf[14];
+		chip->status[lun].function[1] = buf[15];
+	}
+
+	return 0;
+}
+
+static int enable_oscillator(struct us_data *us)
+{
+	int retval;
+	u8 value;
+
+	retval = rts51x_read_mem(us, 0xFE77, &value, 1);
+	if (retval < 0)
+		return -EIO;
+
+	value |= 0x04;
+	retval = rts51x_write_mem(us, 0xFE77, &value, 1);
+	if (retval < 0)
+		return -EIO;
+
+	retval = rts51x_read_mem(us, 0xFE77, &value, 1);
+	if (retval < 0)
+		return -EIO;
+
+	if (!(value & 0x04))
+		return -EIO;
+
+	return 0;
+}
+
+static int __do_config_autodelink(struct us_data *us, u8 *data, u16 len)
+{
+	int retval;
+	u8 cmnd[12] = {0};
+	u8 *buf;
+
+	usb_stor_dbg(us, "addr = 0xfe47, len = %d\n", len);
+
+	buf = kmemdup(data, len, GFP_NOIO);
+	if (!buf)
+		return USB_STOR_TRANSPORT_ERROR;
+
+	cmnd[0] = 0xF0;
+	cmnd[1] = 0x0E;
+	cmnd[2] = 0xfe;
+	cmnd[3] = 0x47;
+	cmnd[4] = (u8)(len >> 8);
+	cmnd[5] = (u8)len;
+
+	retval = rts51x_bulk_transport_special(us, 0, cmnd, 12, buf, len, DMA_TO_DEVICE, NULL);
+	kfree(buf);
+	if (retval != USB_STOR_TRANSPORT_GOOD) {
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int do_config_autodelink(struct us_data *us, int enable, int force)
+{
+	int retval;
+	u8 value;
+
+	retval = rts51x_read_mem(us, 0xFE47, &value, 1);
+	if (retval < 0)
+		return -EIO;
+
+	if (enable) {
+		if (force)
+			value |= 0x03;
+		else
+			value |= 0x01;
+	} else {
+		value &= ~0x03;
+	}
+
+	usb_stor_dbg(us, "set 0xfe47 to 0x%x\n", value);
+
+	/* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
+	retval = __do_config_autodelink(us, &value, 1);
+	if (retval < 0)
+		return -EIO;
+
+	return 0;
+}
+
+static int config_autodelink_after_power_on(struct us_data *us)
+{
+	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
+	int retval;
+	u8 value;
+
+	if (!CHK_AUTO_DELINK(chip))
+		return 0;
+
+	retval = rts51x_read_mem(us, 0xFE47, &value, 1);
+	if (retval < 0)
+		return -EIO;
+
+	if (auto_delink_en) {
+		CLR_BIT(value, 0);
+		CLR_BIT(value, 1);
+		SET_BIT(value, 2);
+
+		if (CHECK_ID(chip, 0x0138, 0x3882))
+			CLR_BIT(value, 2);
+
+		SET_BIT(value, 7);
+
+		/* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
+		retval = __do_config_autodelink(us, &value, 1);
+		if (retval < 0)
+			return -EIO;
+
+		retval = enable_oscillator(us);
+		if (retval == 0)
+			(void)do_config_autodelink(us, 1, 0);
+	} else {
+		/* Autodelink controlled by firmware */
+
+		SET_BIT(value, 2);
+
+		if (CHECK_ID(chip, 0x0138, 0x3882))
+			CLR_BIT(value, 2);
+
+		if (CHECK_ID(chip, 0x0159, 0x5889) ||
+		    CHECK_ID(chip, 0x0138, 0x3880)) {
+			CLR_BIT(value, 0);
+			CLR_BIT(value, 7);
+		}
+
+		/* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
+		retval = __do_config_autodelink(us, &value, 1);
+		if (retval < 0)
+			return -EIO;
+
+		if (CHECK_ID(chip, 0x0159, 0x5888)) {
+			value = 0xFF;
+			retval = rts51x_write_mem(us, 0xFE79, &value, 1);
+			if (retval < 0)
+				return -EIO;
+
+			value = 0x01;
+			retval = rts51x_write_mem(us, 0x48, &value, 1);
+			if (retval < 0)
+				return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int config_autodelink_before_power_down(struct us_data *us)
+{
+	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
+	int retval;
+	u8 value;
+
+	if (!CHK_AUTO_DELINK(chip))
+		return 0;
+
+	if (auto_delink_en) {
+		retval = rts51x_read_mem(us, 0xFE77, &value, 1);
+		if (retval < 0)
+			return -EIO;
+
+		SET_BIT(value, 2);
+		retval = rts51x_write_mem(us, 0xFE77, &value, 1);
+		if (retval < 0)
+			return -EIO;
+
+		if (CHECK_ID(chip, 0x0159, 0x5888)) {
+			value = 0x01;
+			retval = rts51x_write_mem(us, 0x48, &value, 1);
+			if (retval < 0)
+				return -EIO;
+		}
+
+		retval = rts51x_read_mem(us, 0xFE47, &value, 1);
+		if (retval < 0)
+			return -EIO;
+
+		SET_BIT(value, 0);
+		if (CHECK_ID(chip, 0x0138, 0x3882))
+			SET_BIT(value, 2);
+		retval = rts51x_write_mem(us, 0xFE77, &value, 1);
+		if (retval < 0)
+			return -EIO;
+	} else {
+		if (CHECK_ID(chip, 0x0159, 0x5889) ||
+		    CHECK_ID(chip, 0x0138, 0x3880) ||
+		    CHECK_ID(chip, 0x0138, 0x3882)) {
+			retval = rts51x_read_mem(us, 0xFE47, &value, 1);
+			if (retval < 0)
+				return -EIO;
+
+			if (CHECK_ID(chip, 0x0159, 0x5889) ||
+			    CHECK_ID(chip, 0x0138, 0x3880)) {
+				SET_BIT(value, 0);
+				SET_BIT(value, 7);
+			}
+
+			if (CHECK_ID(chip, 0x0138, 0x3882))
+				SET_BIT(value, 2);
+
+			/* retval = rts51x_write_mem(us, 0xFE47, &value, 1); */
+			retval = __do_config_autodelink(us, &value, 1);
+			if (retval < 0)
+				return -EIO;
+		}
+
+		if (CHECK_ID(chip, 0x0159, 0x5888)) {
+			value = 0x01;
+			retval = rts51x_write_mem(us, 0x48, &value, 1);
+			if (retval < 0)
+				return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+static void fw5895_init(struct us_data *us)
+{
+	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
+	int retval;
+	u8 val;
+
+	if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
+		usb_stor_dbg(us, "Not the specified device, return immediately!\n");
+	} else {
+		retval = rts51x_read_mem(us, 0xFD6F, &val, 1);
+		if (retval == STATUS_SUCCESS && (val & 0x1F) == 0) {
+			val = 0x1F;
+			retval = rts51x_write_mem(us, 0xFD70, &val, 1);
+			if (retval != STATUS_SUCCESS)
+				usb_stor_dbg(us, "Write memory fail\n");
+		} else {
+			usb_stor_dbg(us, "Read memory fail, OR (val & 0x1F) != 0\n");
+		}
+	}
+}
+#endif
+
+#ifdef CONFIG_REALTEK_AUTOPM
+static void fw5895_set_mmc_wp(struct us_data *us)
+{
+	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
+	int retval;
+	u8 buf[13];
+
+	if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
+		usb_stor_dbg(us, "Not the specified device, return immediately!\n");
+	} else {
+		retval = rts51x_read_mem(us, 0xFD6F, buf, 1);
+		if (retval == STATUS_SUCCESS && (buf[0] & 0x24) == 0x24) {
+			/* SD Exist and SD WP */
+			retval = rts51x_read_mem(us, 0xD04E, buf, 1);
+			if (retval == STATUS_SUCCESS) {
+				buf[0] |= 0x04;
+				retval = rts51x_write_mem(us, 0xFD70, buf, 1);
+				if (retval != STATUS_SUCCESS)
+					usb_stor_dbg(us, "Write memory fail\n");
+			} else {
+				usb_stor_dbg(us, "Read memory fail\n");
+			}
+		} else {
+			usb_stor_dbg(us, "Read memory fail, OR (buf[0]&0x24)!=0x24\n");
+		}
+	}
+}
+
+static void rts51x_modi_suspend_timer(struct rts51x_chip *chip)
+{
+	struct us_data *us = chip->us;
+
+	usb_stor_dbg(us, "state:%d\n", rts51x_get_stat(chip));
+
+	chip->timer_expires = jiffies + msecs_to_jiffies(1000*ss_delay);
+	mod_timer(&chip->rts51x_suspend_timer, chip->timer_expires);
+}
+
+static void rts51x_suspend_timer_fn(struct timer_list *t)
+{
+	struct rts51x_chip *chip = from_timer(chip, t, rts51x_suspend_timer);
+	struct us_data *us = chip->us;
+
+	switch (rts51x_get_stat(chip)) {
+	case RTS51X_STAT_INIT:
+	case RTS51X_STAT_RUN:
+		rts51x_modi_suspend_timer(chip);
+		break;
+	case RTS51X_STAT_IDLE:
+	case RTS51X_STAT_SS:
+		usb_stor_dbg(us, "RTS51X_STAT_SS, power.usage:%d\n",
+			     atomic_read(&us->pusb_intf->dev.power.usage_count));
+
+		if (atomic_read(&us->pusb_intf->dev.power.usage_count) > 0) {
+			usb_stor_dbg(us, "Ready to enter SS state\n");
+			rts51x_set_stat(chip, RTS51X_STAT_SS);
+			/* ignore mass storage interface's children */
+			pm_suspend_ignore_children(&us->pusb_intf->dev, true);
+			usb_autopm_put_interface_async(us->pusb_intf);
+			usb_stor_dbg(us, "RTS51X_STAT_SS 01, power.usage:%d\n",
+				     atomic_read(&us->pusb_intf->dev.power.usage_count));
+		}
+		break;
+	default:
+		usb_stor_dbg(us, "Unknown state !!!\n");
+		break;
+	}
+}
+
+static inline int working_scsi(struct scsi_cmnd *srb)
+{
+	if ((srb->cmnd[0] == TEST_UNIT_READY) ||
+	    (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)) {
+		return 0;
+	}
+
+	return 1;
+}
+
+static void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+	struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
+	static int card_first_show = 1;
+	static u8 media_not_present[] = { 0x70, 0, 0x02, 0, 0, 0, 0,
+		10, 0, 0, 0, 0, 0x3A, 0, 0, 0, 0, 0
+	};
+	static u8 invalid_cmd_field[] = { 0x70, 0, 0x05, 0, 0, 0, 0,
+		10, 0, 0, 0, 0, 0x24, 0, 0, 0, 0, 0
+	};
+	int ret;
+
+	if (working_scsi(srb)) {
+		usb_stor_dbg(us, "working scsi, power.usage:%d\n",
+			     atomic_read(&us->pusb_intf->dev.power.usage_count));
+
+		if (atomic_read(&us->pusb_intf->dev.power.usage_count) <= 0) {
+			ret = usb_autopm_get_interface(us->pusb_intf);
+			usb_stor_dbg(us, "working scsi, ret=%d\n", ret);
+		}
+		if (rts51x_get_stat(chip) != RTS51X_STAT_RUN)
+			rts51x_set_stat(chip, RTS51X_STAT_RUN);
+		chip->proto_handler_backup(srb, us);
+	} else {
+		if (rts51x_get_stat(chip) == RTS51X_STAT_SS) {
+			usb_stor_dbg(us, "NOT working scsi\n");
+			if ((srb->cmnd[0] == TEST_UNIT_READY) &&
+			    (chip->pwr_state == US_SUSPEND)) {
+				if (TST_LUN_READY(chip, srb->device->lun)) {
+					srb->result = SAM_STAT_GOOD;
+				} else {
+					srb->result = SAM_STAT_CHECK_CONDITION;
+					memcpy(srb->sense_buffer,
+					       media_not_present,
+					       US_SENSE_SIZE);
+				}
+				usb_stor_dbg(us, "TEST_UNIT_READY\n");
+				goto out;
+			}
+			if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
+				int prevent = srb->cmnd[4] & 0x1;
+				if (prevent) {
+					srb->result = SAM_STAT_CHECK_CONDITION;
+					memcpy(srb->sense_buffer,
+					       invalid_cmd_field,
+					       US_SENSE_SIZE);
+				} else {
+					srb->result = SAM_STAT_GOOD;
+				}
+				usb_stor_dbg(us, "ALLOW_MEDIUM_REMOVAL\n");
+				goto out;
+			}
+		} else {
+			usb_stor_dbg(us, "NOT working scsi, not SS\n");
+			chip->proto_handler_backup(srb, us);
+			/* Check whether card is plugged in */
+			if (srb->cmnd[0] == TEST_UNIT_READY) {
+				if (srb->result == SAM_STAT_GOOD) {
+					SET_LUN_READY(chip, srb->device->lun);
+					if (card_first_show) {
+						card_first_show = 0;
+						fw5895_set_mmc_wp(us);
+					}
+				} else {
+					CLR_LUN_READY(chip, srb->device->lun);
+					card_first_show = 1;
+				}
+			}
+			if (rts51x_get_stat(chip) != RTS51X_STAT_IDLE)
+				rts51x_set_stat(chip, RTS51X_STAT_IDLE);
+		}
+	}
+out:
+	usb_stor_dbg(us, "state:%d\n", rts51x_get_stat(chip));
+	if (rts51x_get_stat(chip) == RTS51X_STAT_RUN)
+		rts51x_modi_suspend_timer(chip);
+}
+
+static int realtek_cr_autosuspend_setup(struct us_data *us)
+{
+	struct rts51x_chip *chip;
+	struct rts51x_status *status = NULL;
+	u8 buf[16];
+	int retval;
+
+	chip = (struct rts51x_chip *)us->extra;
+	chip->support_auto_delink = 0;
+	chip->pwr_state = US_RESUME;
+	chip->lun_ready = 0;
+	rts51x_set_stat(chip, RTS51X_STAT_INIT);
+
+	retval = rts51x_read_status(us, 0, buf, 16, &(chip->status_len));
+	if (retval != STATUS_SUCCESS) {
+		usb_stor_dbg(us, "Read status fail\n");
+		return -EIO;
+	}
+	status = chip->status;
+	status->vid = ((u16) buf[0] << 8) | buf[1];
+	status->pid = ((u16) buf[2] << 8) | buf[3];
+	status->cur_lun = buf[4];
+	status->card_type = buf[5];
+	status->total_lun = buf[6];
+	status->fw_ver = ((u16) buf[7] << 8) | buf[8];
+	status->phy_exist = buf[9];
+	status->multi_flag = buf[10];
+	status->multi_card = buf[11];
+	status->log_exist = buf[12];
+	if (chip->status_len == 16) {
+		status->detailed_type.detailed_type1 = buf[13];
+		status->function[0] = buf[14];
+		status->function[1] = buf[15];
+	}
+
+	/* back up the proto_handler in us->extra */
+	chip = (struct rts51x_chip *)(us->extra);
+	chip->proto_handler_backup = us->proto_handler;
+	/* Set the autosuspend_delay to 0 */
+	pm_runtime_set_autosuspend_delay(&us->pusb_dev->dev, 0);
+	/* override us->proto_handler setted in get_protocol() */
+	us->proto_handler = rts51x_invoke_transport;
+
+	chip->timer_expires = 0;
+	timer_setup(&chip->rts51x_suspend_timer, rts51x_suspend_timer_fn, 0);
+	fw5895_init(us);
+
+	/* enable autosuspend function of the usb device */
+	usb_enable_autosuspend(us->pusb_dev);
+
+	return 0;
+}
+#endif
+
+static void realtek_cr_destructor(void *extra)
+{
+	struct rts51x_chip *chip = extra;
+
+	if (!chip)
+		return;
+
+#ifdef CONFIG_REALTEK_AUTOPM
+	if (ss_en) {
+		del_timer(&chip->rts51x_suspend_timer);
+		chip->timer_expires = 0;
+	}
+#endif
+	kfree(chip->status);
+}
+
+#ifdef CONFIG_PM
+static int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
+{
+	struct us_data *us = usb_get_intfdata(iface);
+
+	/* wait until no command is running */
+	mutex_lock(&us->dev_mutex);
+
+	config_autodelink_before_power_down(us);
+
+	mutex_unlock(&us->dev_mutex);
+
+	return 0;
+}
+
+static int realtek_cr_resume(struct usb_interface *iface)
+{
+	struct us_data *us = usb_get_intfdata(iface);
+
+	fw5895_init(us);
+	config_autodelink_after_power_on(us);
+
+	return 0;
+}
+#else
+#define realtek_cr_suspend	NULL
+#define realtek_cr_resume	NULL
+#endif
+
+static int init_realtek_cr(struct us_data *us)
+{
+	struct rts51x_chip *chip;
+	int size, i, retval;
+
+	chip = kzalloc(sizeof(struct rts51x_chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	us->extra = chip;
+	us->extra_destructor = realtek_cr_destructor;
+	us->max_lun = chip->max_lun = rts51x_get_max_lun(us);
+	chip->us = us;
+
+	usb_stor_dbg(us, "chip->max_lun = %d\n", chip->max_lun);
+
+	size = (chip->max_lun + 1) * sizeof(struct rts51x_status);
+	chip->status = kzalloc(size, GFP_KERNEL);
+	if (!chip->status)
+		goto INIT_FAIL;
+
+	for (i = 0; i <= (int)(chip->max_lun); i++) {
+		retval = rts51x_check_status(us, (u8) i);
+		if (retval < 0)
+			goto INIT_FAIL;
+	}
+
+	if (CHECK_PID(chip, 0x0138) || CHECK_PID(chip, 0x0158) ||
+	    CHECK_PID(chip, 0x0159)) {
+		if (CHECK_FW_VER(chip, 0x5888) || CHECK_FW_VER(chip, 0x5889) ||
+				CHECK_FW_VER(chip, 0x5901))
+			SET_AUTO_DELINK(chip);
+		if (STATUS_LEN(chip) == 16) {
+			if (SUPPORT_AUTO_DELINK(chip))
+				SET_AUTO_DELINK(chip);
+		}
+	}
+#ifdef CONFIG_REALTEK_AUTOPM
+	if (ss_en)
+		realtek_cr_autosuspend_setup(us);
+#endif
+
+	usb_stor_dbg(us, "chip->flag = 0x%x\n", chip->flag);
+
+	(void)config_autodelink_after_power_on(us);
+
+	return 0;
+
+INIT_FAIL:
+	if (us->extra) {
+		kfree(chip->status);
+		kfree(us->extra);
+		us->extra = NULL;
+	}
+
+	return -EIO;
+}
+
+static struct scsi_host_template realtek_cr_host_template;
+
+static int realtek_cr_probe(struct usb_interface *intf,
+			    const struct usb_device_id *id)
+{
+	struct us_data *us;
+	int result;
+
+	dev_dbg(&intf->dev, "Probe Realtek Card Reader!\n");
+
+	result = usb_stor_probe1(&us, intf, id,
+				 (id - realtek_cr_ids) +
+				 realtek_cr_unusual_dev_list,
+				 &realtek_cr_host_template);
+	if (result)
+		return result;
+
+	result = usb_stor_probe2(us);
+
+	return result;
+}
+
+static struct usb_driver realtek_cr_driver = {
+	.name = DRV_NAME,
+	.probe = realtek_cr_probe,
+	.disconnect = usb_stor_disconnect,
+	/* .suspend =      usb_stor_suspend, */
+	/* .resume =       usb_stor_resume, */
+	.reset_resume = usb_stor_reset_resume,
+	.suspend = realtek_cr_suspend,
+	.resume = realtek_cr_resume,
+	.pre_reset = usb_stor_pre_reset,
+	.post_reset = usb_stor_post_reset,
+	.id_table = realtek_cr_ids,
+	.soft_unbind = 1,
+	.supports_autosuspend = 1,
+	.no_dynamic_id = 1,
+};
+
+module_usb_stor_driver(realtek_cr_driver, realtek_cr_host_template, DRV_NAME);