[PATCH v6 0/4] Add modules for realtek USB card reader

[PATCH v6 0/4] Add modules for realtek USB card reader

[rogerable]

From: Roger Tseng <rogerable@realtek.com>

This patchset adds modules to support Realtek USB vendor specific class flash
card reader: one base module in MFD subsystem and two host modules in both mmc
and memstick subsystems. The architecture is similar to rtsx_pci.

This work is done primarily to replace the staging driver: staging/rts5139,
which doesn't utilize mmc nor memstick subsystems. Once the patchset or its
revision is applied, we may need Greg's help to remove the staging one.

v2:
1. Fix potential buffer overflow in rtsx_usb_seq_write_register()
2. Remove unnecessary casting and messages
3. Revise coding style and white spaces

v3:
1. Fix MMC detection fail when under xhci
2. Minor change of pm_runtime behavior in rtsx_usb_ms to prevent some rare
   freeze due to erroneous Memstick card(not MS-Pro)
3. Further revise coding style as suggested in the thread of v2
4. Using managed resources: devm_*
5. Change license from "GPL v2 and later" to "GPL v2"

v4:
1. Remove invocations to deprecated/removed mmc_suspend|resume_host APIs and
   unnecessary platform device pm routines
2. Support CRC-ignored R1 response for CMD13 in response to commit:
   a27fbf2f067b0cd6f172c8b696b9a44c58bfaa7a: mmc: add ignorance case for 
   CMD13 CRC error
3. Remove unnecessary #ifdef CONFIG_PM_RUNTIME

v5:
1. rtsx_usb_ms.c: adding header inclusion, removing unnecessary NULL checking,
   and add cancel_work_sync in removal handler to wait possible pending
   works.
(Changes only rtsx_usb_ms. Other files remain the same to v4)

v6:
NOTE:since the v3 of patch 1/3 (rtsx_usb) has been merged, only diffs are
submitted and splitted into two.
1. rtsx_usb.c: fix possible race conditions:
   rtsx_usb_bulk_transfer_sglist(): del_timer() => del_timer_sync()
   rtsx_usb_probe(): move setup_timer() before mfd_add_devices() and also
		     remove unnecessary init_timer()
2. rtsx_usb.c: rtsx_usb_suspend(): add comments to LED turn-off
(Changes only rtsx_usb.c. Other files remain the same to v5)

Roger Tseng (4):
  [v6 fix] mfd/rtsx_usb: fix possible race condition
  [v6 fix] mfd/rtsx_usb: add comment in rtsx_usb_suspend
  mmc: Add realtek USB sdmmc host driver
  memstick: Add realtek USB memstick host driver

 drivers/memstick/host/Kconfig       |   10 +
 drivers/memstick/host/Makefile      |    1 +
 drivers/memstick/host/rtsx_usb_ms.c |  839 ++++++++++++++++++++
 drivers/mfd/rtsx_usb.c              |   14 +-
 drivers/mmc/host/Kconfig            |    7 +
 drivers/mmc/host/Makefile           |    1 +
 drivers/mmc/host/rtsx_usb_sdmmc.c   | 1462 +++++++++++++++++++++++++++++++++++
 7 files changed, 2330 insertions(+), 4 deletions(-)
 create mode 100644 drivers/memstick/host/rtsx_usb_ms.c
 create mode 100644 drivers/mmc/host/rtsx_usb_sdmmc.c

-- 
1.8.2

[PATCH v6 1/4] [v6 fix] mfd/rtsx_usb: fix possible race condition

[rogerable]

From: Roger Tseng <rogerable@realtek.com>

Fix two possible race condition generated by misuse of del_timer in
rtsx_usb_bulk_transfer_sglist() and uninitialized timers before mfd_add_devices
in rtsx_usb_probe().

Signed-off-by: Roger Tseng <rogerable@realtek.com>
---
 drivers/mfd/rtsx_usb.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/rtsx_usb.c b/drivers/mfd/rtsx_usb.c
index b53b9d4..0ca7973 100644
--- a/drivers/mfd/rtsx_usb.c
+++ b/drivers/mfd/rtsx_usb.c
@@ -67,7 +67,7 @@ static int rtsx_usb_bulk_transfer_sglist(struct rtsx_ucr *ucr,
 	ucr->sg_timer.expires = jiffies + msecs_to_jiffies(timeout);
 	add_timer(&ucr->sg_timer);
 	usb_sg_wait(&ucr->current_sg);
-	del_timer(&ucr->sg_timer);
+	del_timer_sync(&ucr->sg_timer);
 
 	if (act_len)
 		*act_len = ucr->current_sg.bytes;
@@ -644,14 +644,14 @@ static int rtsx_usb_probe(struct usb_interface *intf,
 	if (ret)
 		goto out_init_fail;
 
+	/* initialize USB SG transfer timer */
+	setup_timer(&ucr->sg_timer, rtsx_usb_sg_timed_out, (unsigned long) ucr);
+
 	ret = mfd_add_devices(&intf->dev, usb_dev->devnum, rtsx_usb_cells,
 			ARRAY_SIZE(rtsx_usb_cells), NULL, 0, NULL);
 	if (ret)
 		goto out_init_fail;
 
-	/* initialize USB SG transfer timer */
-	init_timer(&ucr->sg_timer);
-	setup_timer(&ucr->sg_timer, rtsx_usb_sg_timed_out, (unsigned long) ucr);
 #ifdef CONFIG_PM
 	intf->needs_remote_wakeup = 1;
 	usb_enable_autosuspend(usb_dev);
-- 
1.8.2

[PATCH v6 2/4] [v6 fix] mfd/rtsx_usb: add comment in rtsx_usb_suspend

[rogerable]

From: Roger Tseng <rogerable@realtek.com>

Explain why there is no need to have a symmetric LED turn-on in resume handler
while calling rtsx_usb_turn_off_led() in suspend handler.

Signed-off-by: Roger Tseng <rogerable@realtek.com>
---
 drivers/mfd/rtsx_usb.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mfd/rtsx_usb.c b/drivers/mfd/rtsx_usb.c
index 0ca7973..141ea52 100644
--- a/drivers/mfd/rtsx_usb.c
+++ b/drivers/mfd/rtsx_usb.c
@@ -687,9 +687,15 @@ static int rtsx_usb_suspend(struct usb_interface *intf, pm_message_t message)
 	dev_dbg(&intf->dev, "%s called with pm message 0x%04u\n",
 			__func__, message.event);
 
+	/*
+	 * Call to make sure LED is off during suspend to save more power.
+	 * It is NOT a permanent state and could be turned on anytime later.
+	 * Thus no need to call turn_on when resunming.
+	 */
 	mutex_lock(&ucr->dev_mutex);
 	rtsx_usb_turn_off_led(ucr);
 	mutex_unlock(&ucr->dev_mutex);
+
 	return 0;
 }
 
-- 
1.8.2

[PATCH v6 3/4] mmc: Add realtek USB sdmmc host driver

[rogerable]

From: Roger Tseng <rogerable@realtek.com>

Realtek USB SD/MMC host driver provides mmc host support based on the Realtek
USB card reader MFD driver.

Signed-off-by: Roger Tseng <rogerable@realtek.com>
---
 drivers/mmc/host/Kconfig          |    7 +
 drivers/mmc/host/Makefile         |    1 +
 drivers/mmc/host/rtsx_usb_sdmmc.c | 1462 +++++++++++++++++++++++++++++++++++++
 3 files changed, 1470 insertions(+)
 create mode 100644 drivers/mmc/host/rtsx_usb_sdmmc.c

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 1384f67..1c01df4 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -689,3 +689,10 @@ config MMC_REALTEK_PCI
 	help
 	  Say Y here to include driver code to support SD/MMC card interface
 	  of Realtek PCI-E card reader
+
+config MMC_REALTEK_USB
+	tristate "Realtek USB SD/MMC Card Interface Driver"
+	depends on MFD_RTSX_USB
+	help
+	  Say Y here to include driver code to support SD/MMC card interface
+	  of Realtek RTS5129/39 series card reader
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 3483b6b..8194317 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_MMC_USHC)		+= ushc.o
 obj-$(CONFIG_MMC_WMT)		+= wmt-sdmmc.o
 
 obj-$(CONFIG_MMC_REALTEK_PCI)	+= rtsx_pci_sdmmc.o
+obj-$(CONFIG_MMC_REALTEK_USB)	+= rtsx_usb_sdmmc.o
 
 obj-$(CONFIG_MMC_SDHCI_PLTFM)		+= sdhci-pltfm.o
 obj-$(CONFIG_MMC_SDHCI_CNS3XXX)		+= sdhci-cns3xxx.o
diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c
new file mode 100644
index 0000000..37f58b5
--- /dev/null
+++ b/drivers/mmc/host/rtsx_usb_sdmmc.c
@@ -0,0 +1,1462 @@
+/* Realtek USB SD/MMC Card Interface driver
+ *
+ * Copyright(c) 2009-2013 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 version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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:
+ *   Roger Tseng <rogerable@realtek.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/usb.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/card.h>
+#include <linux/scatterlist.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/mfd/rtsx_usb.h>
+#include <asm/unaligned.h>
+
+#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#include <linux/leds.h>
+#include <linux/workqueue.h>
+#define RTSX_USB_USE_LEDS_CLASS
+#endif
+
+struct rtsx_usb_sdmmc {
+	struct platform_device	*pdev;
+	struct rtsx_ucr	*ucr;
+	struct mmc_host		*mmc;
+	struct mmc_request	*mrq;
+
+	struct mutex		host_mutex;
+
+	u8			ssc_depth;
+	unsigned int		clock;
+	bool			vpclk;
+	bool			double_clk;
+	bool			host_removal;
+	bool			card_exist;
+	bool			initial_mode;
+	bool			ddr_mode;
+
+	unsigned char		power_mode;
+
+#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+	struct led_classdev	led;
+	char			led_name[32];
+	struct work_struct	led_work;
+#endif
+};
+
+static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host)
+{
+	return &(host->pdev->dev);
+}
+
+static inline void sd_clear_error(struct rtsx_usb_sdmmc *host)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	rtsx_usb_ep0_write_register(ucr, CARD_STOP,
+				  SD_STOP | SD_CLR_ERR,
+				  SD_STOP | SD_CLR_ERR);
+
+	rtsx_usb_clear_dma_err(ucr);
+	rtsx_usb_clear_fsm_err(ucr);
+}
+
+#ifdef DEBUG
+static void sd_print_debug_regs(struct rtsx_usb_sdmmc *host)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	u8 val = 0;
+
+	rtsx_usb_ep0_read_register(ucr, SD_STAT1, &val);
+	dev_dbg(sdmmc_dev(host), "SD_STAT1: 0x%x\n", val);
+	rtsx_usb_ep0_read_register(ucr, SD_STAT2, &val);
+	dev_dbg(sdmmc_dev(host), "SD_STAT2: 0x%x\n", val);
+	rtsx_usb_ep0_read_register(ucr, SD_BUS_STAT, &val);
+	dev_dbg(sdmmc_dev(host), "SD_BUS_STAT: 0x%x\n", val);
+}
+#else
+#define sd_print_debug_regs(host)
+#endif /* DEBUG */
+
+static int sd_read_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
+	       u16 byte_cnt, u8 *buf, int buf_len, int timeout)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+	u8 trans_mode;
+
+	if (!buf)
+		buf_len = 0;
+
+	rtsx_usb_init_cmd(ucr);
+	if (cmd != NULL) {
+		dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__
+				, cmd->opcode);
+		if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
+			trans_mode = SD_TM_AUTO_TUNING;
+		else
+			trans_mode = SD_TM_NORMAL_READ;
+
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD4, 0xFF, (u8)cmd->arg);
+	} else {
+		trans_mode = SD_TM_AUTO_READ_3;
+	}
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
+			0xFF, (u8)(byte_cnt >> 8));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
+			SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
+			SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
+	if (trans_mode != SD_TM_AUTO_TUNING)
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
+			0xFF, trans_mode | SD_TRANSFER_START);
+	rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
+			SD_TRANSFER_END, SD_TRANSFER_END);
+
+	if (cmd != NULL) {
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
+	}
+
+	err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
+	if (err) {
+		dev_dbg(sdmmc_dev(host),
+			"rtsx_usb_send_cmd failed (err = %d)\n", err);
+		return err;
+	}
+
+	err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
+	if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
+		sd_print_debug_regs(host);
+
+		if (!err) {
+			dev_dbg(sdmmc_dev(host),
+				"Transfer failed (SD_TRANSFER = %02x)\n",
+				ucr->rsp_buf[0]);
+			err = -EIO;
+		} else {
+			dev_dbg(sdmmc_dev(host),
+				"rtsx_usb_get_rsp failed (err = %d)\n", err);
+		}
+
+		return err;
+	}
+
+	if (cmd != NULL) {
+		cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
+		dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
+				cmd->resp[0]);
+	}
+
+	if (buf && buf_len) {
+		/* 2-byte aligned part */
+		err = rtsx_usb_read_ppbuf(ucr, buf, byte_cnt - (byte_cnt % 2));
+		if (err) {
+			dev_dbg(sdmmc_dev(host),
+				"rtsx_usb_read_ppbuf failed (err = %d)\n", err);
+			return err;
+		}
+
+		/* unaligned byte */
+		if (byte_cnt % 2)
+			return rtsx_usb_read_register(ucr,
+					PPBUF_BASE2 + byte_cnt,
+					buf + byte_cnt - 1);
+	}
+
+	return 0;
+}
+
+static int sd_write_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
+		u16 byte_cnt, u8 *buf, int buf_len, int timeout)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+	u8 trans_mode;
+
+	if (!buf)
+		buf_len = 0;
+
+	if (buf && buf_len) {
+		err = rtsx_usb_write_ppbuf(ucr, buf, buf_len);
+		if (err) {
+			dev_dbg(sdmmc_dev(host),
+				"rtsx_usb_write_ppbuf failed (err = %d)\n",
+				err);
+			return err;
+		}
+	}
+
+	trans_mode = (cmd != NULL) ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3;
+	rtsx_usb_init_cmd(ucr);
+
+	if (cmd != NULL) {
+		dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__,
+				cmd->opcode);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CMD4, 0xFF, (u8)cmd->arg);
+	}
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
+			0xFF, (u8)(byte_cnt >> 8));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
+		SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
+		SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+			CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
+			trans_mode | SD_TRANSFER_START);
+	rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
+			SD_TRANSFER_END, SD_TRANSFER_END);
+
+	if (cmd != NULL) {
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
+	}
+
+	err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
+	if (err) {
+		dev_dbg(sdmmc_dev(host),
+			"rtsx_usb_send_cmd failed (err = %d)\n", err);
+		return err;
+	}
+
+	err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
+	if (err) {
+		sd_print_debug_regs(host);
+		dev_dbg(sdmmc_dev(host),
+			"rtsx_usb_get_rsp failed (err = %d)\n", err);
+		return err;
+	}
+
+	if (cmd != NULL) {
+		cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
+		dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
+				cmd->resp[0]);
+	}
+
+	return 0;
+}
+
+static void sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc *host,
+		struct mmc_command *cmd)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	u8 cmd_idx = (u8)cmd->opcode;
+	u32 arg = cmd->arg;
+	int err = 0;
+	int timeout = 100;
+	int i;
+	u8 *ptr;
+	int stat_idx = 0;
+	int len = 2;
+	u8 rsp_type;
+
+	dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
+			__func__, cmd_idx, arg);
+
+	/* Response type:
+	 * R0
+	 * R1, R5, R6, R7
+	 * R1b
+	 * R2
+	 * R3, R4
+	 */
+	switch (mmc_resp_type(cmd)) {
+	case MMC_RSP_NONE:
+		rsp_type = SD_RSP_TYPE_R0;
+		break;
+	case MMC_RSP_R1:
+		rsp_type = SD_RSP_TYPE_R1;
+		break;
+	case MMC_RSP_R1 & ~MMC_RSP_CRC:
+		rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
+		break;
+	case MMC_RSP_R1B:
+		rsp_type = SD_RSP_TYPE_R1b;
+		break;
+	case MMC_RSP_R2:
+		rsp_type = SD_RSP_TYPE_R2;
+		break;
+	case MMC_RSP_R3:
+		rsp_type = SD_RSP_TYPE_R3;
+		break;
+	default:
+		dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n");
+		err = -EINVAL;
+		goto out;
+	}
+
+	if (rsp_type == SD_RSP_TYPE_R1b)
+		timeout = 3000;
+
+	if (cmd->opcode == SD_SWITCH_VOLTAGE) {
+		err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
+				SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
+				SD_CLK_TOGGLE_EN);
+		if (err)
+			goto out;
+	}
+
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+			0x01, PINGPONG_BUFFER);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
+			0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
+	rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
+		     SD_TRANSFER_END | SD_STAT_IDLE,
+		     SD_TRANSFER_END | SD_STAT_IDLE);
+
+	if (rsp_type == SD_RSP_TYPE_R2) {
+		/* Read data from ping-pong buffer */
+		for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
+			rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
+		stat_idx = 16;
+	} else if (rsp_type != SD_RSP_TYPE_R0) {
+		/* Read data from SD_CMDx registers */
+		for (i = SD_CMD0; i <= SD_CMD4; i++)
+			rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
+		stat_idx = 5;
+	}
+	len += stat_idx;
+
+	rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0);
+
+	err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
+	if (err) {
+		dev_dbg(sdmmc_dev(host),
+			"rtsx_usb_send_cmd error (err = %d)\n", err);
+		goto out;
+	}
+
+	err = rtsx_usb_get_rsp(ucr, len, timeout);
+	if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
+		sd_print_debug_regs(host);
+		sd_clear_error(host);
+
+		if (!err) {
+			dev_dbg(sdmmc_dev(host),
+				"Transfer failed (SD_TRANSFER = %02x)\n",
+					ucr->rsp_buf[0]);
+			err = -EIO;
+		} else {
+			dev_dbg(sdmmc_dev(host),
+				"rtsx_usb_get_rsp failed (err = %d)\n", err);
+		}
+
+		goto out;
+	}
+
+	if (rsp_type == SD_RSP_TYPE_R0) {
+		err = 0;
+		goto out;
+	}
+
+	/* Skip result of CHECK_REG_CMD */
+	ptr = ucr->rsp_buf + 1;
+
+	/* Check (Start,Transmission) bit of Response */
+	if ((ptr[0] & 0xC0) != 0) {
+		err = -EILSEQ;
+		dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
+		goto out;
+	}
+
+	/* Check CRC7 */
+	if (!(rsp_type & SD_NO_CHECK_CRC7)) {
+		if (ptr[stat_idx] & SD_CRC7_ERR) {
+			err = -EILSEQ;
+			dev_dbg(sdmmc_dev(host), "CRC7 error\n");
+			goto out;
+		}
+	}
+
+	if (rsp_type == SD_RSP_TYPE_R2) {
+		for (i = 0; i < 4; i++) {
+			cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
+			dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
+					i, cmd->resp[i]);
+		}
+	} else {
+		cmd->resp[0] = get_unaligned_be32(ptr + 1);
+		dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
+				cmd->resp[0]);
+	}
+
+out:
+	cmd->error = err;
+}
+
+static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	struct mmc_data *data = mrq->data;
+	int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
+	u8 cfg2, trans_mode;
+	int err;
+	u8 flag;
+	size_t data_len = data->blksz * data->blocks;
+	unsigned int pipe;
+
+	if (read) {
+		dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n",
+				__func__, data_len);
+		cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
+			SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
+		trans_mode = SD_TM_AUTO_READ_3;
+	} else {
+		dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n",
+				__func__, data_len);
+		cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
+			SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
+		trans_mode = SD_TM_AUTO_WRITE_3;
+	}
+
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
+			0xFF, (u8)data->blocks);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
+			0xFF, (u8)(data->blocks >> 8));
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+			0x01, RING_BUFFER);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
+			0xFF, (u8)(data_len >> 24));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
+			0xFF, (u8)(data_len >> 16));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
+			0xFF, (u8)(data_len >> 8));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0,
+			0xFF, (u8)data_len);
+	if (read) {
+		flag = MODE_CDIR;
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
+				0x03 | DMA_PACK_SIZE_MASK,
+				DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
+	} else {
+		flag = MODE_CDOR;
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
+				0x03 | DMA_PACK_SIZE_MASK,
+				DMA_DIR_TO_CARD | DMA_EN | DMA_512);
+	}
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
+			trans_mode | SD_TRANSFER_START);
+	rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
+			SD_TRANSFER_END, SD_TRANSFER_END);
+
+	err = rtsx_usb_send_cmd(ucr, flag, 100);
+	if (err)
+		return err;
+
+	if (read)
+		pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
+	else
+		pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
+
+	err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len,
+			data->sg_len,  NULL, 10000);
+	if (err) {
+		dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n"
+				, err);
+		sd_clear_error(host);
+		return err;
+	}
+
+	return rtsx_usb_get_rsp(ucr, 1, 2000);
+}
+
+static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host)
+{
+	rtsx_usb_write_register(host->ucr, SD_CFG1,
+			SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
+}
+
+static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host)
+{
+	rtsx_usb_write_register(host->ucr, SD_CFG1,
+			SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
+}
+
+static void sd_normal_rw(struct rtsx_usb_sdmmc *host,
+		struct mmc_request *mrq)
+{
+	struct mmc_command *cmd = mrq->cmd;
+	struct mmc_data *data = mrq->data;
+	u8 *buf;
+
+	buf = kzalloc(data->blksz, GFP_NOIO);
+	if (!buf) {
+		cmd->error = -ENOMEM;
+		return;
+	}
+
+	if (data->flags & MMC_DATA_READ) {
+		if (host->initial_mode)
+			sd_disable_initial_mode(host);
+
+		cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
+				data->blksz, 200);
+
+		if (host->initial_mode)
+			sd_enable_initial_mode(host);
+
+		sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
+	} else {
+		sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
+
+		cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
+				data->blksz, 200);
+	}
+
+	kfree(buf);
+}
+
+static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+
+	dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n",
+			__func__, tx ? "TX" : "RX", sample_point);
+
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
+
+	if (tx)
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
+				0x0F, sample_point);
+	else
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL,
+				0x0F, sample_point);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
+			PHASE_NOT_RESET, PHASE_NOT_RESET);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0);
+
+	err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static inline u32 get_phase_point(u32 phase_map, unsigned int idx)
+{
+	idx &= MAX_PHASE;
+	return phase_map & (1 << idx);
+}
+
+static int get_phase_len(u32 phase_map, unsigned int idx)
+{
+	int i;
+
+	for (i = 0; i < MAX_PHASE + 1; i++) {
+		if (get_phase_point(phase_map, idx + i) == 0)
+			return i;
+	}
+	return MAX_PHASE + 1;
+}
+
+static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
+{
+	int start = 0, len = 0;
+	int start_final = 0, len_final = 0;
+	u8 final_phase = 0xFF;
+
+	if (phase_map == 0) {
+		dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map);
+		return final_phase;
+	}
+
+	while (start < MAX_PHASE + 1) {
+		len = get_phase_len(phase_map, start);
+		if (len_final < len) {
+			start_final = start;
+			len_final = len;
+		}
+		start += len ? len : 1;
+	}
+
+	final_phase = (start_final + len_final / 2) & MAX_PHASE;
+	dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n",
+		phase_map, len_final, final_phase);
+
+	return final_phase;
+}
+
+static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
+{
+	int err, i;
+	u8 val = 0;
+
+	for (i = 0; i < 100; i++) {
+		err = rtsx_usb_ep0_read_register(host->ucr,
+				SD_DATA_STATE, &val);
+		if (val & SD_DATA_IDLE)
+			return;
+
+		usleep_range(100, 1000);
+	}
+}
+
+static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host,
+		u8 opcode, u8 sample_point)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	err = sd_change_phase(host, sample_point, 0);
+	if (err)
+		return err;
+
+	cmd.opcode = MMC_SEND_TUNING_BLOCK;
+	err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
+	if (err) {
+		/* Wait till SD DATA IDLE */
+		sd_wait_data_idle(host);
+		sd_clear_error(host);
+		return err;
+	}
+
+	return 0;
+}
+
+static void sd_tuning_phase(struct rtsx_usb_sdmmc *host,
+		u8 opcode, u16 *phase_map)
+{
+	int err, i;
+	u16 raw_phase_map = 0;
+
+	for (i = MAX_PHASE; i >= 0; i--) {
+		err = sd_tuning_rx_cmd(host, opcode, (u8)i);
+		if (!err)
+			raw_phase_map |= 1 << i;
+	}
+
+	if (phase_map)
+		*phase_map = raw_phase_map;
+}
+
+static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode)
+{
+	int err, i;
+	u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
+	u8 final_phase;
+
+	/* setting fixed default TX phase */
+	err = sd_change_phase(host, 0x01, 1);
+	if (err) {
+		dev_dbg(sdmmc_dev(host), "TX phase setting failed\n");
+		return err;
+	}
+
+	/* tuning RX phase */
+	for (i = 0; i < RX_TUNING_CNT; i++) {
+		sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
+
+		if (raw_phase_map[i] == 0)
+			break;
+	}
+
+	phase_map = 0xFFFF;
+	for (i = 0; i < RX_TUNING_CNT; i++) {
+		dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n",
+				i, raw_phase_map[i]);
+		phase_map &= raw_phase_map[i];
+	}
+	dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map);
+
+	if (phase_map) {
+		final_phase = sd_search_final_phase(host, phase_map);
+		if (final_phase == 0xFF)
+			return -EINVAL;
+
+		err = sd_change_phase(host, final_phase, 0);
+		if (err)
+			return err;
+	} else {
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int sdmmc_get_ro(struct mmc_host *mmc)
+{
+	struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+	u16 val;
+
+	if (host->host_removal)
+		return -ENOMEDIUM;
+
+	mutex_lock(&ucr->dev_mutex);
+
+	/* Check SD card detect */
+	err = rtsx_usb_get_card_status(ucr, &val);
+
+	mutex_unlock(&ucr->dev_mutex);
+
+
+	/* Treat failed detection as non-ro */
+	if (err)
+		return 0;
+
+	if (val & SD_WP)
+		return 1;
+
+	return 0;
+}
+
+static int sdmmc_get_cd(struct mmc_host *mmc)
+{
+	struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+	u16 val;
+
+	if (host->host_removal)
+		return -ENOMEDIUM;
+
+	mutex_lock(&ucr->dev_mutex);
+
+	/* Check SD card detect */
+	err = rtsx_usb_get_card_status(ucr, &val);
+
+	mutex_unlock(&ucr->dev_mutex);
+
+	/* Treat failed detection as non-exist */
+	if (err)
+		goto no_card;
+
+	if (val & SD_CD) {
+		host->card_exist = true;
+		return 1;
+	}
+
+no_card:
+	host->card_exist = false;
+	return 0;
+}
+
+static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
+	struct rtsx_ucr *ucr = host->ucr;
+	struct mmc_command *cmd = mrq->cmd;
+	struct mmc_data *data = mrq->data;
+	unsigned int data_size = 0;
+
+	dev_dbg(sdmmc_dev(host), "%s\n", __func__);
+
+	if (host->host_removal) {
+		cmd->error = -ENOMEDIUM;
+		goto finish;
+	}
+
+	if ((!host->card_exist)) {
+		cmd->error = -ENOMEDIUM;
+		goto finish_detect_card;
+	}
+
+	/*
+	 * Reject SDIO CMDs to speed up card identification
+	 * since unsupported
+	 */
+	if (cmd->opcode == SD_IO_SEND_OP_COND ||
+	    cmd->opcode == SD_IO_RW_DIRECT ||
+	    cmd->opcode == SD_IO_RW_EXTENDED) {
+		cmd->error = -EINVAL;
+		goto finish;
+	}
+
+	mutex_lock(&ucr->dev_mutex);
+
+	mutex_lock(&host->host_mutex);
+	host->mrq = mrq;
+	mutex_unlock(&host->host_mutex);
+
+	if (mrq->data)
+		data_size = data->blocks * data->blksz;
+
+	if (!data_size) {
+		sd_send_cmd_get_rsp(host, cmd);
+	} else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) ||
+		   mmc_op_multi(cmd->opcode)) {
+		sd_send_cmd_get_rsp(host, cmd);
+
+		if (!cmd->error) {
+			sd_rw_multi(host, mrq);
+
+			if (mmc_op_multi(cmd->opcode) && mrq->stop) {
+				sd_send_cmd_get_rsp(host, mrq->stop);
+				rtsx_usb_write_register(ucr, MC_FIFO_CTL,
+						FIFO_FLUSH, FIFO_FLUSH);
+			}
+		}
+	} else {
+		sd_normal_rw(host, mrq);
+	}
+
+	if (mrq->data) {
+		if (cmd->error || data->error)
+			data->bytes_xfered = 0;
+		else
+			data->bytes_xfered = data->blocks * data->blksz;
+	}
+
+	mutex_unlock(&ucr->dev_mutex);
+
+finish_detect_card:
+	if (cmd->error) {
+		/*
+		 * detect card when fail to update card existence state and
+		 * speed up card removal when retry
+		 */
+		sdmmc_get_cd(mmc);
+		dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
+	}
+
+finish:
+	mutex_lock(&host->host_mutex);
+	host->mrq = NULL;
+	mutex_unlock(&host->host_mutex);
+
+	mmc_request_done(mmc, mrq);
+}
+
+static int sd_set_bus_width(struct rtsx_usb_sdmmc *host,
+		unsigned char bus_width)
+{
+	int err = 0;
+	u8 width[] = {
+		[MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
+		[MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
+		[MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
+	};
+
+	if (bus_width <= MMC_BUS_WIDTH_8)
+		err = rtsx_usb_write_register(host->ucr, SD_CFG1,
+				0x03, width[bus_width]);
+
+	return err;
+}
+
+static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
+{
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
+{
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
+{
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
+{
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int sd_power_on(struct rtsx_usb_sdmmc *host)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+
+	dev_dbg(sdmmc_dev(host), "%s\n", __func__);
+	rtsx_usb_init_cmd(ucr);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
+			CARD_SHARE_MASK, CARD_SHARE_SD);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
+			SD_CLK_EN, SD_CLK_EN);
+	err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+	if (err)
+		return err;
+
+	if (CHECK_PKG(ucr, LQFP48))
+		err = sd_pull_ctl_enable_lqfp48(ucr);
+	else
+		err = sd_pull_ctl_enable_qfn24(ucr);
+	if (err)
+		return err;
+
+	err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
+			POWER_MASK, PARTIAL_POWER_ON);
+	if (err)
+		return err;
+
+	usleep_range(800, 1000);
+
+	rtsx_usb_init_cmd(ucr);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
+			POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
+			SD_OUTPUT_EN, SD_OUTPUT_EN);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int sd_power_off(struct rtsx_usb_sdmmc *host)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+
+	dev_dbg(sdmmc_dev(host), "%s\n", __func__);
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
+			POWER_MASK, POWER_OFF);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
+			POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND);
+
+	err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+	if (err)
+		return err;
+
+	if (CHECK_PKG(ucr, LQFP48))
+			return sd_pull_ctl_disable_lqfp48(ucr);
+	return sd_pull_ctl_disable_qfn24(ucr);
+}
+
+static int sd_set_power_mode(struct rtsx_usb_sdmmc *host,
+		unsigned char power_mode)
+{
+	int err;
+
+	if (power_mode != MMC_POWER_OFF)
+		power_mode = MMC_POWER_ON;
+
+	if (power_mode == host->power_mode)
+		return 0;
+
+	if (power_mode == MMC_POWER_OFF) {
+		err = sd_power_off(host);
+		pm_runtime_put(sdmmc_dev(host));
+	} else {
+		pm_runtime_get_sync(sdmmc_dev(host));
+		err = sd_power_on(host);
+	}
+
+	if (!err)
+		host->power_mode = power_mode;
+
+	return err;
+}
+
+static int sd_set_timing(struct rtsx_usb_sdmmc *host,
+		unsigned char timing, bool *ddr_mode)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+
+	*ddr_mode = false;
+
+	rtsx_usb_init_cmd(ucr);
+
+	switch (timing) {
+	case MMC_TIMING_UHS_SDR104:
+	case MMC_TIMING_UHS_SDR50:
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
+				0x0C | SD_ASYNC_FIFO_RST,
+				SD_30_MODE | SD_ASYNC_FIFO_RST);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
+				CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
+		break;
+
+	case MMC_TIMING_UHS_DDR50:
+		*ddr_mode = true;
+
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
+				0x0C | SD_ASYNC_FIFO_RST,
+				SD_DDR_MODE | SD_ASYNC_FIFO_RST);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
+				CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
+				DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
+				DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
+				DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
+		break;
+
+	case MMC_TIMING_MMC_HS:
+	case MMC_TIMING_SD_HS:
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
+				0x0C, SD_20_MODE);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
+				CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
+				SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
+				SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
+		break;
+
+	default:
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_CFG1, 0x0C, SD_20_MODE);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
+				CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				SD_PUSH_POINT_CTL, 0xFF, 0);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
+				SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
+		break;
+	}
+
+	err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+
+	return err;
+}
+
+static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
+	struct rtsx_ucr *ucr = host->ucr;
+
+	dev_dbg(sdmmc_dev(host), "%s\n", __func__);
+	mutex_lock(&ucr->dev_mutex);
+
+	if (rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD)) {
+		mutex_unlock(&ucr->dev_mutex);
+		return;
+	}
+
+	sd_set_power_mode(host, ios->power_mode);
+	sd_set_bus_width(host, ios->bus_width);
+	sd_set_timing(host, ios->timing, &host->ddr_mode);
+
+	host->vpclk = false;
+	host->double_clk = true;
+
+	switch (ios->timing) {
+	case MMC_TIMING_UHS_SDR104:
+	case MMC_TIMING_UHS_SDR50:
+		host->ssc_depth = SSC_DEPTH_2M;
+		host->vpclk = true;
+		host->double_clk = false;
+		break;
+	case MMC_TIMING_UHS_DDR50:
+	case MMC_TIMING_UHS_SDR25:
+		host->ssc_depth = SSC_DEPTH_1M;
+		break;
+	default:
+		host->ssc_depth = SSC_DEPTH_512K;
+		break;
+	}
+
+	host->initial_mode = (ios->clock <= 1000000) ? true : false;
+	host->clock = ios->clock;
+
+	rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth,
+			host->initial_mode, host->double_clk, host->vpclk);
+
+	mutex_unlock(&ucr->dev_mutex);
+	dev_dbg(sdmmc_dev(host), "%s end\n", __func__);
+}
+
+static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
+	struct rtsx_ucr *ucr = host->ucr;
+	int err = 0;
+
+	dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
+			__func__, ios->signal_voltage);
+
+	if (host->host_removal)
+		return -ENOMEDIUM;
+
+	if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120)
+		return -EPERM;
+
+	mutex_lock(&ucr->dev_mutex);
+
+	err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD);
+	if (err) {
+		mutex_unlock(&ucr->dev_mutex);
+		return err;
+	}
+
+	/* Let mmc core do the busy checking, simply stop the forced-toggle
+	 * clock(while issuing CMD11) and switch voltage.
+	 */
+	rtsx_usb_init_cmd(ucr);
+
+	if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
+				SD_IO_USING_1V8, SD_IO_USING_3V3);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
+				TUNE_SD18_MASK, TUNE_SD18_3V3);
+	} else {
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT,
+				SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
+				SD_CLK_FORCE_STOP);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
+				SD_IO_USING_1V8, SD_IO_USING_1V8);
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
+				TUNE_SD18_MASK, TUNE_SD18_1V8);
+	}
+
+	err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+	mutex_unlock(&ucr->dev_mutex);
+
+	return err;
+}
+
+static int sdmmc_card_busy(struct mmc_host *mmc)
+{
+	struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+	u8 stat;
+	u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS
+		| SD_DAT0_STATUS;
+
+	dev_dbg(sdmmc_dev(host), "%s\n", __func__);
+
+	mutex_lock(&ucr->dev_mutex);
+
+	err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
+			SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
+			SD_CLK_TOGGLE_EN);
+	if (err)
+		goto out;
+
+	mdelay(1);
+
+	err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat);
+	if (err)
+		goto out;
+
+	err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
+			SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
+out:
+	mutex_unlock(&ucr->dev_mutex);
+
+	if (err)
+		return err;
+
+	/* check if any pin between dat[0:3] is low */
+	if ((stat & mask) != mask)
+		return 1;
+	else
+		return 0;
+}
+
+static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+	struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
+	struct rtsx_ucr *ucr = host->ucr;
+	int err = 0;
+
+	if (host->host_removal)
+		return -ENOMEDIUM;
+
+	mutex_lock(&ucr->dev_mutex);
+
+	if (!host->ddr_mode)
+		err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
+
+	mutex_unlock(&ucr->dev_mutex);
+
+	return err;
+}
+
+static const struct mmc_host_ops rtsx_usb_sdmmc_ops = {
+	.request = sdmmc_request,
+	.set_ios = sdmmc_set_ios,
+	.get_ro = sdmmc_get_ro,
+	.get_cd = sdmmc_get_cd,
+	.start_signal_voltage_switch = sdmmc_switch_voltage,
+	.card_busy = sdmmc_card_busy,
+	.execute_tuning = sdmmc_execute_tuning,
+};
+
+#ifdef RTSX_USB_USE_LEDS_CLASS
+static void rtsx_usb_led_control(struct led_classdev *led,
+	enum led_brightness brightness)
+{
+	struct rtsx_usb_sdmmc *host = container_of(led,
+			struct rtsx_usb_sdmmc, led);
+
+	if (host->host_removal)
+		return;
+
+	host->led.brightness = brightness;
+	schedule_work(&host->led_work);
+}
+
+static void rtsx_usb_update_led(struct work_struct *work)
+{
+	struct rtsx_usb_sdmmc *host =
+		container_of(work, struct rtsx_usb_sdmmc, led_work);
+	struct rtsx_ucr *ucr = host->ucr;
+
+	mutex_lock(&ucr->dev_mutex);
+
+	if (host->led.brightness == LED_OFF)
+		rtsx_usb_turn_off_led(ucr);
+	else
+		rtsx_usb_turn_on_led(ucr);
+
+	mutex_unlock(&ucr->dev_mutex);
+}
+#endif
+
+static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host)
+{
+	struct mmc_host *mmc = host->mmc;
+
+	mmc->f_min = 250000;
+	mmc->f_max = 208000000;
+	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
+	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
+		MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
+		MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |
+		MMC_CAP_NEEDS_POLL;
+
+	mmc->max_current_330 = 400;
+	mmc->max_current_180 = 800;
+	mmc->ops = &rtsx_usb_sdmmc_ops;
+	mmc->max_segs = 256;
+	mmc->max_seg_size = 65536;
+	mmc->max_blk_size = 512;
+	mmc->max_blk_count = 65535;
+	mmc->max_req_size = 524288;
+
+	host->power_mode = MMC_POWER_OFF;
+}
+
+static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
+{
+	struct mmc_host *mmc;
+	struct rtsx_usb_sdmmc *host;
+	struct rtsx_ucr *ucr;
+#ifdef RTSX_USB_USE_LEDS_CLASS
+	int err;
+#endif
+
+	ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
+	if (!ucr)
+		return -ENXIO;
+
+	dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n");
+
+	mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
+	if (!mmc)
+		return -ENOMEM;
+
+	host = mmc_priv(mmc);
+	host->ucr = ucr;
+	host->mmc = mmc;
+	host->pdev = pdev;
+	platform_set_drvdata(pdev, host);
+
+	mutex_init(&host->host_mutex);
+	rtsx_usb_init_host(host);
+	pm_runtime_enable(&pdev->dev);
+
+#ifdef RTSX_USB_USE_LEDS_CLASS
+	snprintf(host->led_name, sizeof(host->led_name),
+		"%s::", mmc_hostname(mmc));
+	host->led.name = host->led_name;
+	host->led.brightness = LED_OFF;
+	host->led.default_trigger = mmc_hostname(mmc);
+	host->led.brightness_set = rtsx_usb_led_control;
+
+	err = led_classdev_register(mmc_dev(mmc), &host->led);
+	if (err)
+		dev_err(&(pdev->dev),
+				"Failed to register LED device: %d\n", err);
+	INIT_WORK(&host->led_work, rtsx_usb_update_led);
+
+#endif
+	mmc_add_host(mmc);
+
+	return 0;
+}
+
+static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev)
+{
+	struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev);
+	struct mmc_host *mmc;
+
+	if (!host)
+		return 0;
+
+	mmc = host->mmc;
+	host->host_removal = true;
+
+	mutex_lock(&host->host_mutex);
+	if (host->mrq) {
+		dev_dbg(&(pdev->dev),
+			"%s: Controller removed during transfer\n",
+			mmc_hostname(mmc));
+		host->mrq->cmd->error = -ENOMEDIUM;
+		if (host->mrq->stop)
+			host->mrq->stop->error = -ENOMEDIUM;
+		mmc_request_done(mmc, host->mrq);
+	}
+	mutex_unlock(&host->host_mutex);
+
+	mmc_remove_host(mmc);
+
+#ifdef RTSX_USB_USE_LEDS_CLASS
+	cancel_work_sync(&host->led_work);
+	led_classdev_unregister(&host->led);
+#endif
+
+	mmc_free_host(mmc);
+
+	/* Balance possible unbalanced usage count
+	 * e.g. unconditional module removal
+	 */
+	if (pm_runtime_active(&pdev->dev))
+		pm_runtime_put(&pdev->dev);
+
+	pm_runtime_disable(&pdev->dev);
+	platform_set_drvdata(pdev, NULL);
+
+	dev_dbg(&(pdev->dev),
+		": Realtek USB SD/MMC module has been removed\n");
+
+	return 0;
+}
+
+static struct platform_device_id rtsx_usb_sdmmc_ids[] = {
+	{
+		.name = "rtsx_usb_sdmmc",
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids);
+
+static struct platform_driver rtsx_usb_sdmmc_driver = {
+	.probe		= rtsx_usb_sdmmc_drv_probe,
+	.remove		= rtsx_usb_sdmmc_drv_remove,
+	.id_table       = rtsx_usb_sdmmc_ids,
+	.driver		= {
+		.owner	= THIS_MODULE,
+		.name	= "rtsx_usb_sdmmc",
+	},
+};
+module_platform_driver(rtsx_usb_sdmmc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
+MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");
-- 
1.8.2

[PATCH v6 4/4] memstick: Add realtek USB memstick host driver

[rogerable]

From: Roger Tseng <rogerable@realtek.com>

Realtek USB memstick host driver provides memstick host support based on the
Realtek USB card reader MFD driver.

Signed-off-by: Roger Tseng <rogerable@realtek.com>
---
 drivers/memstick/host/Kconfig       |  10 +
 drivers/memstick/host/Makefile      |   1 +
 drivers/memstick/host/rtsx_usb_ms.c | 839 ++++++++++++++++++++++++++++++++++++
 3 files changed, 850 insertions(+)
 create mode 100644 drivers/memstick/host/rtsx_usb_ms.c

diff --git a/drivers/memstick/host/Kconfig b/drivers/memstick/host/Kconfig
index 1b37cf8..7310e32 100644
--- a/drivers/memstick/host/Kconfig
+++ b/drivers/memstick/host/Kconfig
@@ -52,3 +52,13 @@ config MEMSTICK_REALTEK_PCI
 
 	  To compile this driver as a module, choose M here: the module will
 	  be called rtsx_pci_ms.
+
+config MEMSTICK_REALTEK_USB
+	tristate "Realtek USB Memstick Card Interface Driver"
+	depends on MFD_RTSX_USB
+	help
+	  Say Y here to include driver code to support Memstick card interface
+	  of Realtek RTS5129/39 series USB card reader
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called rts5139_ms.
diff --git a/drivers/memstick/host/Makefile b/drivers/memstick/host/Makefile
index af3459d..491c955 100644
--- a/drivers/memstick/host/Makefile
+++ b/drivers/memstick/host/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_MEMSTICK_TIFM_MS)		+= tifm_ms.o
 obj-$(CONFIG_MEMSTICK_JMICRON_38X)	+= jmb38x_ms.o
 obj-$(CONFIG_MEMSTICK_R592)		+= r592.o
 obj-$(CONFIG_MEMSTICK_REALTEK_PCI)	+= rtsx_pci_ms.o
+obj-$(CONFIG_MEMSTICK_REALTEK_USB)	+= rtsx_usb_ms.o
diff --git a/drivers/memstick/host/rtsx_usb_ms.c b/drivers/memstick/host/rtsx_usb_ms.c
new file mode 100644
index 0000000..a7282b7
--- /dev/null
+++ b/drivers/memstick/host/rtsx_usb_ms.c
@@ -0,0 +1,839 @@
+/* Realtek USB Memstick Card Interface driver
+ *
+ * Copyright(c) 2009-2013 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 version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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:
+ *   Roger Tseng <rogerable@realtek.com>
+ */
+
+#include <linux/module.h>
+#include <linux/highmem.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/memstick.h>
+#include <linux/kthread.h>
+#include <linux/mfd/rtsx_usb.h>
+#include <linux/pm_runtime.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/completion.h>
+#include <asm/unaligned.h>
+
+struct rtsx_usb_ms {
+	struct platform_device	*pdev;
+	struct rtsx_ucr	*ucr;
+	struct memstick_host	*msh;
+	struct memstick_request	*req;
+
+	struct mutex		host_mutex;
+	struct work_struct	handle_req;
+
+	struct task_struct	*detect_ms;
+	struct completion	detect_ms_exit;
+
+	u8			ssc_depth;
+	unsigned int		clock;
+	int			power_mode;
+	unsigned char           ifmode;
+	bool			eject;
+};
+
+static inline struct device *ms_dev(struct rtsx_usb_ms *host)
+{
+	return &(host->pdev->dev);
+}
+
+static inline void ms_clear_error(struct rtsx_usb_ms *host)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	rtsx_usb_ep0_write_register(ucr, CARD_STOP,
+				  MS_STOP | MS_CLR_ERR,
+				  MS_STOP | MS_CLR_ERR);
+
+	rtsx_usb_clear_dma_err(ucr);
+	rtsx_usb_clear_fsm_err(ucr);
+}
+
+#ifdef DEBUG
+
+static void ms_print_debug_regs(struct rtsx_usb_ms *host)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	u16 i;
+	u8 *ptr;
+
+	/* Print MS host internal registers */
+	rtsx_usb_init_cmd(ucr);
+
+	/* MS_CFG to MS_INT_REG */
+	for (i = 0xFD40; i <= 0xFD44; i++)
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
+
+	/* CARD_SHARE_MODE to CARD_GPIO */
+	for (i = 0xFD51; i <= 0xFD56; i++)
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
+
+	/* CARD_PULL_CTLx */
+	for (i = 0xFD60; i <= 0xFD65; i++)
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, i, 0, 0);
+
+	/* CARD_DATA_SOURCE, CARD_SELECT, CARD_CLK_EN, CARD_PWR_CTL */
+	rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_DATA_SOURCE, 0, 0);
+	rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_SELECT, 0, 0);
+	rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_CLK_EN, 0, 0);
+	rtsx_usb_add_cmd(ucr, READ_REG_CMD, CARD_PWR_CTL, 0, 0);
+
+	rtsx_usb_send_cmd(ucr, MODE_CR, 100);
+	rtsx_usb_get_rsp(ucr, 21, 100);
+
+	ptr = ucr->rsp_buf;
+	for (i = 0xFD40; i <= 0xFD44; i++)
+		dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+	for (i = 0xFD51; i <= 0xFD56; i++)
+		dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+	for (i = 0xFD60; i <= 0xFD65; i++)
+		dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
+
+	dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_DATA_SOURCE, *(ptr++));
+	dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_SELECT, *(ptr++));
+	dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_CLK_EN, *(ptr++));
+	dev_dbg(ms_dev(host), "0x%04X: 0x%02x\n", CARD_PWR_CTL, *(ptr++));
+}
+
+#else
+
+static void ms_print_debug_regs(struct rtsx_usb_ms *host)
+{
+}
+
+#endif
+
+static int ms_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
+{
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
+{
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
+{
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
+{
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_power_on(struct rtsx_usb_ms *host)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+
+	dev_dbg(ms_dev(host), "%s\n", __func__);
+
+	rtsx_usb_init_cmd(ucr);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, MS_MOD_SEL);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
+			CARD_SHARE_MASK, CARD_SHARE_MS);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
+			MS_CLK_EN, MS_CLK_EN);
+	err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+	if (err < 0)
+		return err;
+
+	if (CHECK_PKG(ucr, LQFP48))
+		err = ms_pull_ctl_enable_lqfp48(ucr);
+	else
+		err = ms_pull_ctl_enable_qfn24(ucr);
+	if (err < 0)
+		return err;
+
+	err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
+			POWER_MASK, PARTIAL_POWER_ON);
+	if (err)
+		return err;
+
+	usleep_range(800, 1000);
+
+	rtsx_usb_init_cmd(ucr);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
+			POWER_MASK, POWER_ON);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
+			MS_OUTPUT_EN, MS_OUTPUT_EN);
+
+	return rtsx_usb_send_cmd(ucr, MODE_C, 100);
+}
+
+static int ms_power_off(struct rtsx_usb_ms *host)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+
+	dev_dbg(ms_dev(host), "%s\n", __func__);
+
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, MS_CLK_EN, 0);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, MS_OUTPUT_EN, 0);
+
+	err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
+	if (err < 0)
+		return err;
+
+	if (CHECK_PKG(ucr, LQFP48))
+		return ms_pull_ctl_disable_lqfp48(ucr);
+
+	return ms_pull_ctl_disable_qfn24(ucr);
+}
+
+static int ms_transfer_data(struct rtsx_usb_ms *host, unsigned char data_dir,
+		u8 tpc, u8 cfg, struct scatterlist *sg)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err;
+	unsigned int length = sg->length;
+	u16 sec_cnt = (u16)(length / 512);
+	u8 trans_mode, dma_dir, flag;
+	unsigned int pipe;
+	struct memstick_dev *card = host->msh->card;
+
+	dev_dbg(ms_dev(host), "%s: tpc = 0x%02x, data_dir = %s, length = %d\n",
+			__func__, tpc, (data_dir == READ) ? "READ" : "WRITE",
+			length);
+
+	if (data_dir == READ) {
+		flag = MODE_CDIR;
+		dma_dir = DMA_DIR_FROM_CARD;
+		if (card->id.type != MEMSTICK_TYPE_PRO)
+			trans_mode = MS_TM_NORMAL_READ;
+		else
+			trans_mode = MS_TM_AUTO_READ;
+		pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
+	} else {
+		flag = MODE_CDOR;
+		dma_dir = DMA_DIR_TO_CARD;
+		if (card->id.type != MEMSTICK_TYPE_PRO)
+			trans_mode = MS_TM_NORMAL_WRITE;
+		else
+			trans_mode = MS_TM_AUTO_WRITE;
+		pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
+	}
+
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+	if (card->id.type == MEMSTICK_TYPE_PRO) {
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_H,
+				0xFF, (u8)(sec_cnt >> 8));
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_SECTOR_CNT_L,
+				0xFF, (u8)sec_cnt);
+	}
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
+			0xFF, (u8)(length >> 24));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
+			0xFF, (u8)(length >> 16));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
+			0xFF, (u8)(length >> 8));
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0, 0xFF,
+			(u8)length);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
+			0x03 | DMA_PACK_SIZE_MASK, dma_dir | DMA_EN | DMA_512);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+			0x01, RING_BUFFER);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
+			0xFF, MS_TRANSFER_START | trans_mode);
+	rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
+			MS_TRANSFER_END, MS_TRANSFER_END);
+
+	err = rtsx_usb_send_cmd(ucr, flag | STAGE_MS_STATUS, 100);
+	if (err)
+		return err;
+
+	err = rtsx_usb_transfer_data(ucr, pipe, sg, length,
+			1, NULL, 10000);
+	if (err)
+		goto err_out;
+
+	err = rtsx_usb_get_rsp(ucr, 3, 15000);
+	if (err)
+		goto err_out;
+
+	if (ucr->rsp_buf[0] & MS_TRANSFER_ERR ||
+	    ucr->rsp_buf[1] & (MS_CRC16_ERR | MS_RDY_TIMEOUT)) {
+		err = -EIO;
+		goto err_out;
+	}
+	return 0;
+err_out:
+	ms_clear_error(host);
+	return err;
+}
+
+static int ms_write_bytes(struct rtsx_usb_ms *host, u8 tpc,
+		u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err, i;
+
+	dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
+
+	rtsx_usb_init_cmd(ucr);
+
+	for (i = 0; i < cnt; i++)
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				PPBUF_BASE2 + i, 0xFF, data[i]);
+
+	if (cnt % 2)
+		rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
+				PPBUF_BASE2 + i, 0xFF, 0xFF);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+			0x01, PINGPONG_BUFFER);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
+			0xFF, MS_TRANSFER_START | MS_TM_WRITE_BYTES);
+	rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
+			MS_TRANSFER_END, MS_TRANSFER_END);
+	rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
+
+	err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
+	if (err)
+		return err;
+
+	err = rtsx_usb_get_rsp(ucr, 2, 5000);
+	if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
+		u8 val;
+
+		rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val);
+		dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
+
+		if (int_reg)
+			*int_reg = val & 0x0F;
+
+		ms_print_debug_regs(host);
+
+		ms_clear_error(host);
+
+		if (!(tpc & 0x08)) {
+			if (val & MS_CRC16_ERR)
+				return -EIO;
+		} else {
+			if (!(val & 0x80)) {
+				if (val & (MS_INT_ERR | MS_INT_CMDNK))
+					return -EIO;
+			}
+		}
+
+		return -ETIMEDOUT;
+	}
+
+	if (int_reg)
+		*int_reg = ucr->rsp_buf[1] & 0x0F;
+
+	return 0;
+}
+
+static int ms_read_bytes(struct rtsx_usb_ms *host, u8 tpc,
+		u8 cfg, u8 cnt, u8 *data, u8 *int_reg)
+{
+	struct rtsx_ucr *ucr = host->ucr;
+	int err, i;
+	u8 *ptr;
+
+	dev_dbg(ms_dev(host), "%s: tpc = 0x%02x\n", __func__, tpc);
+
+	rtsx_usb_init_cmd(ucr);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TPC, 0xFF, tpc);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_BYTE_CNT, 0xFF, cnt);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANS_CFG, 0xFF, cfg);
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
+			0x01, PINGPONG_BUFFER);
+
+	rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MS_TRANSFER,
+			0xFF, MS_TRANSFER_START | MS_TM_READ_BYTES);
+	rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, MS_TRANSFER,
+			MS_TRANSFER_END, MS_TRANSFER_END);
+	for (i = 0; i < cnt - 1; i++)
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + i, 0, 0);
+	if (cnt % 2)
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD, PPBUF_BASE2 + cnt, 0, 0);
+	else
+		rtsx_usb_add_cmd(ucr, READ_REG_CMD,
+				PPBUF_BASE2 + cnt - 1, 0, 0);
+
+	rtsx_usb_add_cmd(ucr, READ_REG_CMD, MS_TRANS_CFG, 0, 0);
+
+	err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
+	if (err)
+		return err;
+
+	err = rtsx_usb_get_rsp(ucr, cnt + 2, 5000);
+	if (err || (ucr->rsp_buf[0] & MS_TRANSFER_ERR)) {
+		u8 val;
+
+		rtsx_usb_ep0_read_register(ucr, MS_TRANS_CFG, &val);
+		dev_dbg(ms_dev(host), "MS_TRANS_CFG: 0x%02x\n", val);
+
+		if (int_reg && (host->ifmode != MEMSTICK_SERIAL))
+			*int_reg = val & 0x0F;
+
+		ms_print_debug_regs(host);
+
+		ms_clear_error(host);
+
+		if (!(tpc & 0x08)) {
+			if (val & MS_CRC16_ERR)
+				return -EIO;
+		} else {
+			if (!(val & 0x80)) {
+				if (val & (MS_INT_ERR | MS_INT_CMDNK))
+					return -EIO;
+			}
+		}
+
+		return -ETIMEDOUT;
+	}
+
+	ptr = ucr->rsp_buf + 1;
+	for (i = 0; i < cnt; i++)
+		data[i] = *ptr++;
+
+
+	if (int_reg && (host->ifmode != MEMSTICK_SERIAL))
+		*int_reg = *ptr & 0x0F;
+
+	return 0;
+}
+
+static int rtsx_usb_ms_issue_cmd(struct rtsx_usb_ms *host)
+{
+	struct memstick_request *req = host->req;
+	int err = 0;
+	u8 cfg = 0, int_reg;
+
+	dev_dbg(ms_dev(host), "%s\n", __func__);
+
+	if (req->need_card_int) {
+		if (host->ifmode != MEMSTICK_SERIAL)
+			cfg = WAIT_INT;
+	}
+
+	if (req->long_data) {
+		err = ms_transfer_data(host, req->data_dir,
+				req->tpc, cfg, &(req->sg));
+	} else {
+		if (req->data_dir == READ)
+			err = ms_read_bytes(host, req->tpc, cfg,
+					req->data_len, req->data, &int_reg);
+		else
+			err = ms_write_bytes(host, req->tpc, cfg,
+					req->data_len, req->data, &int_reg);
+	}
+	if (err < 0)
+		return err;
+
+	if (req->need_card_int) {
+		if (host->ifmode == MEMSTICK_SERIAL) {
+			err = ms_read_bytes(host, MS_TPC_GET_INT,
+					NO_WAIT_INT, 1, &req->int_reg, NULL);
+			if (err < 0)
+				return err;
+		} else {
+
+			if (int_reg & MS_INT_CMDNK)
+				req->int_reg |= MEMSTICK_INT_CMDNAK;
+			if (int_reg & MS_INT_BREQ)
+				req->int_reg |= MEMSTICK_INT_BREQ;
+			if (int_reg & MS_INT_ERR)
+				req->int_reg |= MEMSTICK_INT_ERR;
+			if (int_reg & MS_INT_CED)
+				req->int_reg |= MEMSTICK_INT_CED;
+		}
+		dev_dbg(ms_dev(host), "int_reg: 0x%02x\n", req->int_reg);
+	}
+
+	return 0;
+}
+
+static void rtsx_usb_ms_handle_req(struct work_struct *work)
+{
+	struct rtsx_usb_ms *host = container_of(work,
+			struct rtsx_usb_ms, handle_req);
+	struct rtsx_ucr *ucr = host->ucr;
+	struct memstick_host *msh = host->msh;
+	int rc;
+
+	if (!host->req) {
+		do {
+			rc = memstick_next_req(msh, &host->req);
+			dev_dbg(ms_dev(host), "next req %d\n", rc);
+
+			if (!rc) {
+				mutex_lock(&ucr->dev_mutex);
+
+				if (rtsx_usb_card_exclusive_check(ucr,
+							RTSX_USB_MS_CARD))
+					host->req->error = -EIO;
+				else
+					host->req->error =
+						rtsx_usb_ms_issue_cmd(host);
+
+				mutex_unlock(&ucr->dev_mutex);
+
+				dev_dbg(ms_dev(host), "req result %d\n",
+						host->req->error);
+			}
+		} while (!rc);
+	}
+
+}
+
+static void rtsx_usb_ms_request(struct memstick_host *msh)
+{
+	struct rtsx_usb_ms *host = memstick_priv(msh);
+
+	dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+	if (!host->eject)
+		schedule_work(&host->handle_req);
+}
+
+static int rtsx_usb_ms_set_param(struct memstick_host *msh,
+		enum memstick_param param, int value)
+{
+	struct rtsx_usb_ms *host = memstick_priv(msh);
+	struct rtsx_ucr *ucr = host->ucr;
+	unsigned int clock = 0;
+	u8 ssc_depth = 0;
+	int err;
+
+	dev_dbg(ms_dev(host), "%s: param = %d, value = %d\n",
+			__func__, param, value);
+
+	mutex_lock(&ucr->dev_mutex);
+
+	err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_MS_CARD);
+	if (err)
+		goto out;
+
+	switch (param) {
+	case MEMSTICK_POWER:
+		if (value == host->power_mode)
+			break;
+
+		if (value == MEMSTICK_POWER_ON) {
+			pm_runtime_get_sync(ms_dev(host));
+			err = ms_power_on(host);
+		} else if (value == MEMSTICK_POWER_OFF) {
+			err = ms_power_off(host);
+			if (host->msh->card)
+				pm_runtime_put_noidle(ms_dev(host));
+			else
+				pm_runtime_put(ms_dev(host));
+		} else
+			err = -EINVAL;
+		if (!err)
+			host->power_mode = value;
+		break;
+
+	case MEMSTICK_INTERFACE:
+		if (value == MEMSTICK_SERIAL) {
+			clock = 19000000;
+			ssc_depth = SSC_DEPTH_512K;
+			err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
+				       MS_BUS_WIDTH_1 | PUSH_TIME_DEFAULT);
+			if (err < 0)
+				break;
+		} else if (value == MEMSTICK_PAR4) {
+			clock = 39000000;
+			ssc_depth = SSC_DEPTH_1M;
+
+			err = rtsx_usb_write_register(ucr, MS_CFG, 0x5A,
+					MS_BUS_WIDTH_4 | PUSH_TIME_ODD |
+					MS_NO_CHECK_INT);
+			if (err < 0)
+				break;
+		} else {
+			err = -EINVAL;
+			break;
+		}
+
+		err = rtsx_usb_switch_clock(ucr, clock,
+				ssc_depth, false, true, false);
+		if (err < 0) {
+			dev_dbg(ms_dev(host), "switch clock failed\n");
+			break;
+		}
+
+		host->ssc_depth = ssc_depth;
+		host->clock = clock;
+		host->ifmode = value;
+		break;
+	default:
+		err = -EINVAL;
+		break;
+	}
+out:
+	mutex_unlock(&ucr->dev_mutex);
+
+	/* power-on delay */
+	if (param == MEMSTICK_POWER && value == MEMSTICK_POWER_ON)
+		usleep_range(10000, 12000);
+
+	dev_dbg(ms_dev(host), "%s: return = %d\n", __func__, err);
+	return err;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int rtsx_usb_ms_suspend(struct device *dev)
+{
+	struct rtsx_usb_ms *host = dev_get_drvdata(dev);
+	struct memstick_host *msh = host->msh;
+
+	dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+	memstick_suspend_host(msh);
+	return 0;
+}
+
+static int rtsx_usb_ms_resume(struct device *dev)
+{
+	struct rtsx_usb_ms *host = dev_get_drvdata(dev);
+	struct memstick_host *msh = host->msh;
+
+	dev_dbg(ms_dev(host), "--> %s\n", __func__);
+
+	memstick_resume_host(msh);
+	return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+/*
+ * Thread function of ms card slot detection. The thread starts right after
+ * successful host addition. It stops while the driver removal function sets
+ * host->eject true.
+ */
+static int rtsx_usb_detect_ms_card(void *__host)
+{
+	struct rtsx_usb_ms *host = (struct rtsx_usb_ms *)__host;
+	struct rtsx_ucr *ucr = host->ucr;
+	u8 val = 0;
+	int err;
+
+	for (;;) {
+		mutex_lock(&ucr->dev_mutex);
+
+		/* Check pending MS card changes */
+		err = rtsx_usb_read_register(ucr, CARD_INT_PEND, &val);
+		if (err) {
+			mutex_unlock(&ucr->dev_mutex);
+			goto poll_again;
+		}
+
+		/* Clear the pending */
+		rtsx_usb_write_register(ucr, CARD_INT_PEND,
+				XD_INT | MS_INT | SD_INT,
+				XD_INT | MS_INT | SD_INT);
+
+		mutex_unlock(&ucr->dev_mutex);
+
+		if (val & MS_INT) {
+			dev_dbg(ms_dev(host), "MS slot change detected\n");
+			memstick_detect_change(host->msh);
+		}
+
+poll_again:
+		if (host->eject)
+			break;
+
+		msleep(1000);
+	}
+
+	complete(&host->detect_ms_exit);
+	return 0;
+}
+
+static int rtsx_usb_ms_drv_probe(struct platform_device *pdev)
+{
+	struct memstick_host *msh;
+	struct rtsx_usb_ms *host;
+	struct rtsx_ucr *ucr;
+	int err;
+
+	ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
+	if (!ucr)
+		return -ENXIO;
+
+	dev_dbg(&(pdev->dev),
+			"Realtek USB Memstick controller found\n");
+
+	msh = memstick_alloc_host(sizeof(*host), &pdev->dev);
+	if (!msh)
+		return -ENOMEM;
+
+	host = memstick_priv(msh);
+	host->ucr = ucr;
+	host->msh = msh;
+	host->pdev = pdev;
+	host->power_mode = MEMSTICK_POWER_OFF;
+	platform_set_drvdata(pdev, host);
+
+	mutex_init(&host->host_mutex);
+	INIT_WORK(&host->handle_req, rtsx_usb_ms_handle_req);
+
+	init_completion(&host->detect_ms_exit);
+	host->detect_ms = kthread_create(rtsx_usb_detect_ms_card, host,
+			"rtsx_usb_ms_%d", pdev->id);
+	if (IS_ERR(host->detect_ms)) {
+		dev_dbg(&(pdev->dev),
+				"Unable to create polling thread.\n");
+		err = PTR_ERR(host->detect_ms);
+		goto err_out;
+	}
+
+	msh->request = rtsx_usb_ms_request;
+	msh->set_param = rtsx_usb_ms_set_param;
+	msh->caps = MEMSTICK_CAP_PAR4;
+
+	pm_runtime_enable(&pdev->dev);
+	err = memstick_add_host(msh);
+	if (err)
+		goto err_out;
+
+	wake_up_process(host->detect_ms);
+	return 0;
+err_out:
+	memstick_free_host(msh);
+	return err;
+}
+
+static int rtsx_usb_ms_drv_remove(struct platform_device *pdev)
+{
+	struct rtsx_usb_ms *host = platform_get_drvdata(pdev);
+	struct memstick_host *msh;
+	int err;
+
+	msh = host->msh;
+	host->eject = true;
+	cancel_work_sync(&host->handle_req);
+
+	mutex_lock(&host->host_mutex);
+	if (host->req) {
+		dev_dbg(&(pdev->dev),
+			"%s: Controller removed during transfer\n",
+			dev_name(&msh->dev));
+		host->req->error = -ENOMEDIUM;
+		do {
+			err = memstick_next_req(msh, &host->req);
+			if (!err)
+				host->req->error = -ENOMEDIUM;
+		} while (!err);
+	}
+	mutex_unlock(&host->host_mutex);
+
+	wait_for_completion(&host->detect_ms_exit);
+	memstick_remove_host(msh);
+	memstick_free_host(msh);
+
+	/* Balance possible unbalanced usage count
+	 * e.g. unconditional module removal
+	 */
+	if (pm_runtime_active(ms_dev(host)))
+		pm_runtime_put(ms_dev(host));
+
+	pm_runtime_disable(&pdev->dev);
+	platform_set_drvdata(pdev, NULL);
+
+	dev_dbg(&(pdev->dev),
+		": Realtek USB Memstick controller has been removed\n");
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(rtsx_usb_ms_pm_ops,
+		rtsx_usb_ms_suspend, rtsx_usb_ms_resume);
+
+static struct platform_device_id rtsx_usb_ms_ids[] = {
+	{
+		.name = "rtsx_usb_ms",
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(platform, rtsx_usb_ms_ids);
+
+static struct platform_driver rtsx_usb_ms_driver = {
+	.probe		= rtsx_usb_ms_drv_probe,
+	.remove		= rtsx_usb_ms_drv_remove,
+	.id_table       = rtsx_usb_ms_ids,
+	.driver		= {
+		.owner	= THIS_MODULE,
+		.name	= "rtsx_usb_ms",
+		.pm	= &rtsx_usb_ms_pm_ops,
+	},
+};
+module_platform_driver(rtsx_usb_ms_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
+MODULE_DESCRIPTION("Realtek USB Memstick Card Host Driver");
-- 
1.8.2

Re: [PATCH v6 3/4] mmc: Add realtek USB sdmmc host driver

[Ulf Hansson]

On 9 April 2014 08:16,  <rogerable@realtek.com> wrote:
> From: Roger Tseng <rogerable@realtek.com>
>
> Realtek USB SD/MMC host driver provides mmc host support based on the Realtek
> USB card reader MFD driver.
>
> Signed-off-by: Roger Tseng <rogerable@realtek.com>
> ---
>  drivers/mmc/host/Kconfig          |    7 +
>  drivers/mmc/host/Makefile         |    1 +
>  drivers/mmc/host/rtsx_usb_sdmmc.c | 1462 +++++++++++++++++++++++++++++++++++++
>  3 files changed, 1470 insertions(+)
>  create mode 100644 drivers/mmc/host/rtsx_usb_sdmmc.c
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 1384f67..1c01df4 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -689,3 +689,10 @@ config MMC_REALTEK_PCI
>         help
>           Say Y here to include driver code to support SD/MMC card interface
>           of Realtek PCI-E card reader
> +
> +config MMC_REALTEK_USB
> +       tristate "Realtek USB SD/MMC Card Interface Driver"
> +       depends on MFD_RTSX_USB
> +       help
> +         Say Y here to include driver code to support SD/MMC card interface
> +         of Realtek RTS5129/39 series card reader
> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> index 3483b6b..8194317 100644
> --- a/drivers/mmc/host/Makefile
> +++ b/drivers/mmc/host/Makefile
> @@ -53,6 +53,7 @@ obj-$(CONFIG_MMC_USHC)                += ushc.o
>  obj-$(CONFIG_MMC_WMT)          += wmt-sdmmc.o
>
>  obj-$(CONFIG_MMC_REALTEK_PCI)  += rtsx_pci_sdmmc.o
> +obj-$(CONFIG_MMC_REALTEK_USB)  += rtsx_usb_sdmmc.o
>
>  obj-$(CONFIG_MMC_SDHCI_PLTFM)          += sdhci-pltfm.o
>  obj-$(CONFIG_MMC_SDHCI_CNS3XXX)                += sdhci-cns3xxx.o
> diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c
> new file mode 100644
> index 0000000..37f58b5
> --- /dev/null
> +++ b/drivers/mmc/host/rtsx_usb_sdmmc.c
> @@ -0,0 +1,1462 @@
> +/* Realtek USB SD/MMC Card Interface driver
> + *
> + * Copyright(c) 2009-2013 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 version 2
> + * as published by the Free Software Foundation.
> + *
> + * 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:
> + *   Roger Tseng <rogerable@realtek.com>
> + */
> +
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/delay.h>
> +#include <linux/platform_device.h>
> +#include <linux/usb.h>
> +#include <linux/mmc/host.h>
> +#include <linux/mmc/mmc.h>
> +#include <linux/mmc/sd.h>
> +#include <linux/mmc/sdio.h>
> +#include <linux/mmc/card.h>
> +#include <linux/scatterlist.h>
> +#include <linux/pm_runtime.h>
> +
> +#include <linux/mfd/rtsx_usb.h>
> +#include <asm/unaligned.h>
> +
> +#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
> +#include <linux/leds.h>
> +#include <linux/workqueue.h>
> +#define RTSX_USB_USE_LEDS_CLASS
> +#endif
> +
> +struct rtsx_usb_sdmmc {
> +       struct platform_device  *pdev;
> +       struct rtsx_ucr *ucr;
> +       struct mmc_host         *mmc;
> +       struct mmc_request      *mrq;
> +
> +       struct mutex            host_mutex;
> +
> +       u8                      ssc_depth;
> +       unsigned int            clock;
> +       bool                    vpclk;
> +       bool                    double_clk;
> +       bool                    host_removal;
> +       bool                    card_exist;
> +       bool                    initial_mode;
> +       bool                    ddr_mode;
> +
> +       unsigned char           power_mode;
> +
> +#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
> +       struct led_classdev     led;
> +       char                    led_name[32];
> +       struct work_struct      led_work;
> +#endif
> +};
> +
> +static inline struct device *sdmmc_dev(struct rtsx_usb_sdmmc *host)
> +{
> +       return &(host->pdev->dev);
> +}
> +
> +static inline void sd_clear_error(struct rtsx_usb_sdmmc *host)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       rtsx_usb_ep0_write_register(ucr, CARD_STOP,
> +                                 SD_STOP | SD_CLR_ERR,
> +                                 SD_STOP | SD_CLR_ERR);
> +
> +       rtsx_usb_clear_dma_err(ucr);
> +       rtsx_usb_clear_fsm_err(ucr);
> +}
> +
> +#ifdef DEBUG
> +static void sd_print_debug_regs(struct rtsx_usb_sdmmc *host)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       u8 val = 0;
> +
> +       rtsx_usb_ep0_read_register(ucr, SD_STAT1, &val);
> +       dev_dbg(sdmmc_dev(host), "SD_STAT1: 0x%x\n", val);
> +       rtsx_usb_ep0_read_register(ucr, SD_STAT2, &val);
> +       dev_dbg(sdmmc_dev(host), "SD_STAT2: 0x%x\n", val);
> +       rtsx_usb_ep0_read_register(ucr, SD_BUS_STAT, &val);
> +       dev_dbg(sdmmc_dev(host), "SD_BUS_STAT: 0x%x\n", val);
> +}
> +#else
> +#define sd_print_debug_regs(host)
> +#endif /* DEBUG */
> +
> +static int sd_read_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
> +              u16 byte_cnt, u8 *buf, int buf_len, int timeout)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +       u8 trans_mode;
> +
> +       if (!buf)
> +               buf_len = 0;
> +
> +       rtsx_usb_init_cmd(ucr);
> +       if (cmd != NULL) {
> +               dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__
> +                               , cmd->opcode);
> +               if (cmd->opcode == MMC_SEND_TUNING_BLOCK)
> +                       trans_mode = SD_TM_AUTO_TUNING;
> +               else
> +                       trans_mode = SD_TM_NORMAL_READ;
> +
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD4, 0xFF, (u8)cmd->arg);
> +       } else {
> +               trans_mode = SD_TM_AUTO_READ_3;
> +       }
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
> +                       0xFF, (u8)(byte_cnt >> 8));
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
> +                       SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
> +                       SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
> +       if (trans_mode != SD_TM_AUTO_TUNING)
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
> +                       0xFF, trans_mode | SD_TRANSFER_START);
> +       rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
> +                       SD_TRANSFER_END, SD_TRANSFER_END);
> +
> +       if (cmd != NULL) {
> +               rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
> +               rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
> +               rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
> +               rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
> +       }
> +
> +       err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
> +       if (err) {
> +               dev_dbg(sdmmc_dev(host),
> +                       "rtsx_usb_send_cmd failed (err = %d)\n", err);
> +               return err;
> +       }
> +
> +       err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
> +       if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
> +               sd_print_debug_regs(host);
> +
> +               if (!err) {
> +                       dev_dbg(sdmmc_dev(host),
> +                               "Transfer failed (SD_TRANSFER = %02x)\n",
> +                               ucr->rsp_buf[0]);
> +                       err = -EIO;
> +               } else {
> +                       dev_dbg(sdmmc_dev(host),
> +                               "rtsx_usb_get_rsp failed (err = %d)\n", err);
> +               }
> +
> +               return err;
> +       }
> +
> +       if (cmd != NULL) {
> +               cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
> +               dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
> +                               cmd->resp[0]);
> +       }
> +
> +       if (buf && buf_len) {
> +               /* 2-byte aligned part */
> +               err = rtsx_usb_read_ppbuf(ucr, buf, byte_cnt - (byte_cnt % 2));
> +               if (err) {
> +                       dev_dbg(sdmmc_dev(host),
> +                               "rtsx_usb_read_ppbuf failed (err = %d)\n", err);
> +                       return err;
> +               }
> +
> +               /* unaligned byte */
> +               if (byte_cnt % 2)
> +                       return rtsx_usb_read_register(ucr,
> +                                       PPBUF_BASE2 + byte_cnt,
> +                                       buf + byte_cnt - 1);
> +       }
> +
> +       return 0;
> +}
> +
> +static int sd_write_data(struct rtsx_usb_sdmmc *host, struct mmc_command *cmd,
> +               u16 byte_cnt, u8 *buf, int buf_len, int timeout)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +       u8 trans_mode;
> +
> +       if (!buf)
> +               buf_len = 0;
> +
> +       if (buf && buf_len) {
> +               err = rtsx_usb_write_ppbuf(ucr, buf, buf_len);
> +               if (err) {
> +                       dev_dbg(sdmmc_dev(host),
> +                               "rtsx_usb_write_ppbuf failed (err = %d)\n",
> +                               err);
> +                       return err;
> +               }
> +       }
> +
> +       trans_mode = (cmd != NULL) ? SD_TM_AUTO_WRITE_2 : SD_TM_AUTO_WRITE_3;
> +       rtsx_usb_init_cmd(ucr);
> +
> +       if (cmd != NULL) {
> +               dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD%d\n", __func__,
> +                               cmd->opcode);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD0, 0xFF, (u8)(cmd->opcode) | 0x40);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD1, 0xFF, (u8)(cmd->arg >> 24));
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD2, 0xFF, (u8)(cmd->arg >> 16));
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD3, 0xFF, (u8)(cmd->arg >> 8));
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CMD4, 0xFF, (u8)cmd->arg);
> +       }
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, (u8)byte_cnt);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H,
> +                       0xFF, (u8)(byte_cnt >> 8));
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L, 0xFF, 1);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H, 0xFF, 0);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF,
> +               SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
> +               SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_6);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                       CARD_DATA_SOURCE, 0x01, PINGPONG_BUFFER);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
> +                       trans_mode | SD_TRANSFER_START);
> +       rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
> +                       SD_TRANSFER_END, SD_TRANSFER_END);
> +
> +       if (cmd != NULL) {
> +               rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD1, 0, 0);
> +               rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD2, 0, 0);
> +               rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD3, 0, 0);
> +               rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_CMD4, 0, 0);
> +       }
> +
> +       err = rtsx_usb_send_cmd(ucr, MODE_CR, timeout);
> +       if (err) {
> +               dev_dbg(sdmmc_dev(host),
> +                       "rtsx_usb_send_cmd failed (err = %d)\n", err);
> +               return err;
> +       }
> +
> +       err = rtsx_usb_get_rsp(ucr, !cmd ? 1 : 5, timeout);
> +       if (err) {
> +               sd_print_debug_regs(host);
> +               dev_dbg(sdmmc_dev(host),
> +                       "rtsx_usb_get_rsp failed (err = %d)\n", err);
> +               return err;
> +       }
> +
> +       if (cmd != NULL) {
> +               cmd->resp[0] = get_unaligned_be32(ucr->rsp_buf + 1);
> +               dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
> +                               cmd->resp[0]);
> +       }
> +
> +       return 0;
> +}
> +
> +static void sd_send_cmd_get_rsp(struct rtsx_usb_sdmmc *host,
> +               struct mmc_command *cmd)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       u8 cmd_idx = (u8)cmd->opcode;
> +       u32 arg = cmd->arg;
> +       int err = 0;
> +       int timeout = 100;
> +       int i;
> +       u8 *ptr;
> +       int stat_idx = 0;
> +       int len = 2;
> +       u8 rsp_type;
> +
> +       dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
> +                       __func__, cmd_idx, arg);
> +
> +       /* Response type:
> +        * R0
> +        * R1, R5, R6, R7
> +        * R1b
> +        * R2
> +        * R3, R4
> +        */
> +       switch (mmc_resp_type(cmd)) {
> +       case MMC_RSP_NONE:
> +               rsp_type = SD_RSP_TYPE_R0;
> +               break;
> +       case MMC_RSP_R1:
> +               rsp_type = SD_RSP_TYPE_R1;
> +               break;
> +       case MMC_RSP_R1 & ~MMC_RSP_CRC:
> +               rsp_type = SD_RSP_TYPE_R1 | SD_NO_CHECK_CRC7;
> +               break;
> +       case MMC_RSP_R1B:
> +               rsp_type = SD_RSP_TYPE_R1b;
> +               break;
> +       case MMC_RSP_R2:
> +               rsp_type = SD_RSP_TYPE_R2;
> +               break;
> +       case MMC_RSP_R3:
> +               rsp_type = SD_RSP_TYPE_R3;
> +               break;
> +       default:
> +               dev_dbg(sdmmc_dev(host), "cmd->flag is not valid\n");
> +               err = -EINVAL;
> +               goto out;
> +       }
> +
> +       if (rsp_type == SD_RSP_TYPE_R1b)
> +               timeout = 3000;
> +
> +       if (cmd->opcode == SD_SWITCH_VOLTAGE) {
> +               err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
> +                               SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
> +                               SD_CLK_TOGGLE_EN);
> +               if (err)
> +                       goto out;
> +       }
> +
> +       rtsx_usb_init_cmd(ucr);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD0, 0xFF, 0x40 | cmd_idx);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD1, 0xFF, (u8)(arg >> 24));
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD2, 0xFF, (u8)(arg >> 16));
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD3, 0xFF, (u8)(arg >> 8));
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CMD4, 0xFF, (u8)arg);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, rsp_type);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
> +                       0x01, PINGPONG_BUFFER);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER,
> +                       0xFF, SD_TM_CMD_RSP | SD_TRANSFER_START);
> +       rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
> +                    SD_TRANSFER_END | SD_STAT_IDLE,
> +                    SD_TRANSFER_END | SD_STAT_IDLE);
> +
> +       if (rsp_type == SD_RSP_TYPE_R2) {
> +               /* Read data from ping-pong buffer */
> +               for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
> +                       rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
> +               stat_idx = 16;
> +       } else if (rsp_type != SD_RSP_TYPE_R0) {
> +               /* Read data from SD_CMDx registers */
> +               for (i = SD_CMD0; i <= SD_CMD4; i++)
> +                       rtsx_usb_add_cmd(ucr, READ_REG_CMD, (u16)i, 0, 0);
> +               stat_idx = 5;
> +       }
> +       len += stat_idx;
> +
> +       rtsx_usb_add_cmd(ucr, READ_REG_CMD, SD_STAT1, 0, 0);
> +
> +       err = rtsx_usb_send_cmd(ucr, MODE_CR, 100);
> +       if (err) {
> +               dev_dbg(sdmmc_dev(host),
> +                       "rtsx_usb_send_cmd error (err = %d)\n", err);
> +               goto out;
> +       }
> +
> +       err = rtsx_usb_get_rsp(ucr, len, timeout);
> +       if (err || (ucr->rsp_buf[0] & SD_TRANSFER_ERR)) {
> +               sd_print_debug_regs(host);
> +               sd_clear_error(host);
> +
> +               if (!err) {
> +                       dev_dbg(sdmmc_dev(host),
> +                               "Transfer failed (SD_TRANSFER = %02x)\n",
> +                                       ucr->rsp_buf[0]);
> +                       err = -EIO;
> +               } else {
> +                       dev_dbg(sdmmc_dev(host),
> +                               "rtsx_usb_get_rsp failed (err = %d)\n", err);
> +               }
> +
> +               goto out;
> +       }
> +
> +       if (rsp_type == SD_RSP_TYPE_R0) {
> +               err = 0;
> +               goto out;
> +       }
> +
> +       /* Skip result of CHECK_REG_CMD */
> +       ptr = ucr->rsp_buf + 1;
> +
> +       /* Check (Start,Transmission) bit of Response */
> +       if ((ptr[0] & 0xC0) != 0) {
> +               err = -EILSEQ;
> +               dev_dbg(sdmmc_dev(host), "Invalid response bit\n");
> +               goto out;
> +       }
> +
> +       /* Check CRC7 */
> +       if (!(rsp_type & SD_NO_CHECK_CRC7)) {
> +               if (ptr[stat_idx] & SD_CRC7_ERR) {
> +                       err = -EILSEQ;
> +                       dev_dbg(sdmmc_dev(host), "CRC7 error\n");
> +                       goto out;
> +               }
> +       }
> +
> +       if (rsp_type == SD_RSP_TYPE_R2) {
> +               for (i = 0; i < 4; i++) {
> +                       cmd->resp[i] = get_unaligned_be32(ptr + 1 + i * 4);
> +                       dev_dbg(sdmmc_dev(host), "cmd->resp[%d] = 0x%08x\n",
> +                                       i, cmd->resp[i]);
> +               }
> +       } else {
> +               cmd->resp[0] = get_unaligned_be32(ptr + 1);
> +               dev_dbg(sdmmc_dev(host), "cmd->resp[0] = 0x%08x\n",
> +                               cmd->resp[0]);
> +       }
> +
> +out:
> +       cmd->error = err;
> +}
> +
> +static int sd_rw_multi(struct rtsx_usb_sdmmc *host, struct mmc_request *mrq)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       struct mmc_data *data = mrq->data;
> +       int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
> +       u8 cfg2, trans_mode;
> +       int err;
> +       u8 flag;
> +       size_t data_len = data->blksz * data->blocks;
> +       unsigned int pipe;
> +
> +       if (read) {
> +               dev_dbg(sdmmc_dev(host), "%s: read %zu bytes\n",
> +                               __func__, data_len);
> +               cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
> +                       SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
> +               trans_mode = SD_TM_AUTO_READ_3;
> +       } else {
> +               dev_dbg(sdmmc_dev(host), "%s: write %zu bytes\n",
> +                               __func__, data_len);
> +               cfg2 = SD_NO_CALCULATE_CRC7 | SD_CHECK_CRC16 |
> +                       SD_NO_WAIT_BUSY_END | SD_NO_CHECK_CRC7 | SD_RSP_LEN_0;
> +               trans_mode = SD_TM_AUTO_WRITE_3;
> +       }
> +
> +       rtsx_usb_init_cmd(ucr);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_L, 0xFF, 0x00);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BYTE_CNT_H, 0xFF, 0x02);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_L,
> +                       0xFF, (u8)data->blocks);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BLOCK_CNT_H,
> +                       0xFF, (u8)(data->blocks >> 8));
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_DATA_SOURCE,
> +                       0x01, RING_BUFFER);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC3,
> +                       0xFF, (u8)(data_len >> 24));
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC2,
> +                       0xFF, (u8)(data_len >> 16));
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC1,
> +                       0xFF, (u8)(data_len >> 8));
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_TC0,
> +                       0xFF, (u8)data_len);
> +       if (read) {
> +               flag = MODE_CDIR;
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
> +                               0x03 | DMA_PACK_SIZE_MASK,
> +                               DMA_DIR_FROM_CARD | DMA_EN | DMA_512);
> +       } else {
> +               flag = MODE_CDOR;
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, MC_DMA_CTL,
> +                               0x03 | DMA_PACK_SIZE_MASK,
> +                               DMA_DIR_TO_CARD | DMA_EN | DMA_512);
> +       }
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_TRANSFER, 0xFF,
> +                       trans_mode | SD_TRANSFER_START);
> +       rtsx_usb_add_cmd(ucr, CHECK_REG_CMD, SD_TRANSFER,
> +                       SD_TRANSFER_END, SD_TRANSFER_END);
> +
> +       err = rtsx_usb_send_cmd(ucr, flag, 100);
> +       if (err)
> +               return err;
> +
> +       if (read)
> +               pipe = usb_rcvbulkpipe(ucr->pusb_dev, EP_BULK_IN);
> +       else
> +               pipe = usb_sndbulkpipe(ucr->pusb_dev, EP_BULK_OUT);
> +
> +       err = rtsx_usb_transfer_data(ucr, pipe, data->sg, data_len,
> +                       data->sg_len,  NULL, 10000);
> +       if (err) {
> +               dev_dbg(sdmmc_dev(host), "rtsx_usb_transfer_data error %d\n"
> +                               , err);
> +               sd_clear_error(host);
> +               return err;
> +       }
> +
> +       return rtsx_usb_get_rsp(ucr, 1, 2000);
> +}
> +
> +static inline void sd_enable_initial_mode(struct rtsx_usb_sdmmc *host)
> +{
> +       rtsx_usb_write_register(host->ucr, SD_CFG1,
> +                       SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_128);
> +}
> +
> +static inline void sd_disable_initial_mode(struct rtsx_usb_sdmmc *host)
> +{
> +       rtsx_usb_write_register(host->ucr, SD_CFG1,
> +                       SD_CLK_DIVIDE_MASK, SD_CLK_DIVIDE_0);
> +}
> +
> +static void sd_normal_rw(struct rtsx_usb_sdmmc *host,
> +               struct mmc_request *mrq)
> +{
> +       struct mmc_command *cmd = mrq->cmd;
> +       struct mmc_data *data = mrq->data;
> +       u8 *buf;
> +
> +       buf = kzalloc(data->blksz, GFP_NOIO);
> +       if (!buf) {
> +               cmd->error = -ENOMEM;
> +               return;
> +       }
> +
> +       if (data->flags & MMC_DATA_READ) {
> +               if (host->initial_mode)
> +                       sd_disable_initial_mode(host);
> +
> +               cmd->error = sd_read_data(host, cmd, (u16)data->blksz, buf,
> +                               data->blksz, 200);
> +
> +               if (host->initial_mode)
> +                       sd_enable_initial_mode(host);
> +
> +               sg_copy_from_buffer(data->sg, data->sg_len, buf, data->blksz);
> +       } else {
> +               sg_copy_to_buffer(data->sg, data->sg_len, buf, data->blksz);
> +
> +               cmd->error = sd_write_data(host, cmd, (u16)data->blksz, buf,
> +                               data->blksz, 200);
> +       }
> +
> +       kfree(buf);
> +}
> +
> +static int sd_change_phase(struct rtsx_usb_sdmmc *host, u8 sample_point, int tx)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +
> +       dev_dbg(sdmmc_dev(host), "%s: %s sample_point = %d\n",
> +                       __func__, tx ? "TX" : "RX", sample_point);
> +
> +       rtsx_usb_init_cmd(ucr);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, CLK_CHANGE);
> +
> +       if (tx)
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
> +                               0x0F, sample_point);
> +       else
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK1_CTL,
> +                               0x0F, sample_point);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_VPCLK0_CTL,
> +                       PHASE_NOT_RESET, PHASE_NOT_RESET);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CLK_DIV, CLK_CHANGE, 0);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1, SD_ASYNC_FIFO_RST, 0);
> +
> +       err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +       if (err)
> +               return err;
> +
> +       return 0;
> +}
> +
> +static inline u32 get_phase_point(u32 phase_map, unsigned int idx)
> +{
> +       idx &= MAX_PHASE;
> +       return phase_map & (1 << idx);
> +}
> +
> +static int get_phase_len(u32 phase_map, unsigned int idx)
> +{
> +       int i;
> +
> +       for (i = 0; i < MAX_PHASE + 1; i++) {
> +               if (get_phase_point(phase_map, idx + i) == 0)
> +                       return i;
> +       }
> +       return MAX_PHASE + 1;
> +}
> +
> +static u8 sd_search_final_phase(struct rtsx_usb_sdmmc *host, u32 phase_map)
> +{
> +       int start = 0, len = 0;
> +       int start_final = 0, len_final = 0;
> +       u8 final_phase = 0xFF;
> +
> +       if (phase_map == 0) {
> +               dev_dbg(sdmmc_dev(host), "Phase: [map:%x]\n", phase_map);
> +               return final_phase;
> +       }
> +
> +       while (start < MAX_PHASE + 1) {
> +               len = get_phase_len(phase_map, start);
> +               if (len_final < len) {
> +                       start_final = start;
> +                       len_final = len;
> +               }
> +               start += len ? len : 1;
> +       }
> +
> +       final_phase = (start_final + len_final / 2) & MAX_PHASE;
> +       dev_dbg(sdmmc_dev(host), "Phase: [map:%x] [maxlen:%d] [final:%d]\n",
> +               phase_map, len_final, final_phase);
> +
> +       return final_phase;
> +}
> +
> +static void sd_wait_data_idle(struct rtsx_usb_sdmmc *host)
> +{
> +       int err, i;
> +       u8 val = 0;
> +
> +       for (i = 0; i < 100; i++) {
> +               err = rtsx_usb_ep0_read_register(host->ucr,
> +                               SD_DATA_STATE, &val);
> +               if (val & SD_DATA_IDLE)
> +                       return;
> +
> +               usleep_range(100, 1000);
> +       }
> +}
> +
> +static int sd_tuning_rx_cmd(struct rtsx_usb_sdmmc *host,
> +               u8 opcode, u8 sample_point)
> +{
> +       int err;
> +       struct mmc_command cmd = {0};
> +
> +       err = sd_change_phase(host, sample_point, 0);
> +       if (err)
> +               return err;
> +
> +       cmd.opcode = MMC_SEND_TUNING_BLOCK;
> +       err = sd_read_data(host, &cmd, 0x40, NULL, 0, 100);
> +       if (err) {
> +               /* Wait till SD DATA IDLE */
> +               sd_wait_data_idle(host);
> +               sd_clear_error(host);
> +               return err;
> +       }
> +
> +       return 0;
> +}
> +
> +static void sd_tuning_phase(struct rtsx_usb_sdmmc *host,
> +               u8 opcode, u16 *phase_map)
> +{
> +       int err, i;
> +       u16 raw_phase_map = 0;
> +
> +       for (i = MAX_PHASE; i >= 0; i--) {
> +               err = sd_tuning_rx_cmd(host, opcode, (u8)i);
> +               if (!err)
> +                       raw_phase_map |= 1 << i;
> +       }
> +
> +       if (phase_map)
> +               *phase_map = raw_phase_map;
> +}
> +
> +static int sd_tuning_rx(struct rtsx_usb_sdmmc *host, u8 opcode)
> +{
> +       int err, i;
> +       u16 raw_phase_map[RX_TUNING_CNT] = {0}, phase_map;
> +       u8 final_phase;
> +
> +       /* setting fixed default TX phase */
> +       err = sd_change_phase(host, 0x01, 1);
> +       if (err) {
> +               dev_dbg(sdmmc_dev(host), "TX phase setting failed\n");
> +               return err;
> +       }
> +
> +       /* tuning RX phase */
> +       for (i = 0; i < RX_TUNING_CNT; i++) {
> +               sd_tuning_phase(host, opcode, &(raw_phase_map[i]));
> +
> +               if (raw_phase_map[i] == 0)
> +                       break;
> +       }
> +
> +       phase_map = 0xFFFF;
> +       for (i = 0; i < RX_TUNING_CNT; i++) {
> +               dev_dbg(sdmmc_dev(host), "RX raw_phase_map[%d] = 0x%04x\n",
> +                               i, raw_phase_map[i]);
> +               phase_map &= raw_phase_map[i];
> +       }
> +       dev_dbg(sdmmc_dev(host), "RX phase_map = 0x%04x\n", phase_map);
> +
> +       if (phase_map) {
> +               final_phase = sd_search_final_phase(host, phase_map);
> +               if (final_phase == 0xFF)
> +                       return -EINVAL;
> +
> +               err = sd_change_phase(host, final_phase, 0);
> +               if (err)
> +                       return err;
> +       } else {
> +               return -EINVAL;
> +       }
> +
> +       return 0;
> +}
> +
> +static int sdmmc_get_ro(struct mmc_host *mmc)
> +{
> +       struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +       u16 val;
> +
> +       if (host->host_removal)
> +               return -ENOMEDIUM;
> +
> +       mutex_lock(&ucr->dev_mutex);
> +
> +       /* Check SD card detect */
> +       err = rtsx_usb_get_card_status(ucr, &val);
> +
> +       mutex_unlock(&ucr->dev_mutex);
> +
> +
> +       /* Treat failed detection as non-ro */
> +       if (err)
> +               return 0;
> +
> +       if (val & SD_WP)
> +               return 1;
> +
> +       return 0;
> +}
> +
> +static int sdmmc_get_cd(struct mmc_host *mmc)
> +{
> +       struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +       u16 val;
> +
> +       if (host->host_removal)
> +               return -ENOMEDIUM;
> +
> +       mutex_lock(&ucr->dev_mutex);
> +
> +       /* Check SD card detect */
> +       err = rtsx_usb_get_card_status(ucr, &val);
> +
> +       mutex_unlock(&ucr->dev_mutex);
> +
> +       /* Treat failed detection as non-exist */
> +       if (err)
> +               goto no_card;
> +
> +       if (val & SD_CD) {
> +               host->card_exist = true;
> +               return 1;
> +       }
> +
> +no_card:
> +       host->card_exist = false;
> +       return 0;
> +}
> +
> +static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
> +{
> +       struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
> +       struct rtsx_ucr *ucr = host->ucr;
> +       struct mmc_command *cmd = mrq->cmd;
> +       struct mmc_data *data = mrq->data;
> +       unsigned int data_size = 0;
> +
> +       dev_dbg(sdmmc_dev(host), "%s\n", __func__);
> +
> +       if (host->host_removal) {
> +               cmd->error = -ENOMEDIUM;
> +               goto finish;
> +       }
> +
> +       if ((!host->card_exist)) {
> +               cmd->error = -ENOMEDIUM;
> +               goto finish_detect_card;
> +       }
> +
> +       /*
> +        * Reject SDIO CMDs to speed up card identification
> +        * since unsupported
> +        */
> +       if (cmd->opcode == SD_IO_SEND_OP_COND ||
> +           cmd->opcode == SD_IO_RW_DIRECT ||
> +           cmd->opcode == SD_IO_RW_EXTENDED) {
> +               cmd->error = -EINVAL;
> +               goto finish;
> +       }
> +
> +       mutex_lock(&ucr->dev_mutex);
> +
> +       mutex_lock(&host->host_mutex);
> +       host->mrq = mrq;
> +       mutex_unlock(&host->host_mutex);
> +
> +       if (mrq->data)
> +               data_size = data->blocks * data->blksz;
> +
> +       if (!data_size) {
> +               sd_send_cmd_get_rsp(host, cmd);
> +       } else if ((!(data_size % 512) && cmd->opcode != MMC_SEND_EXT_CSD) ||
> +                  mmc_op_multi(cmd->opcode)) {
> +               sd_send_cmd_get_rsp(host, cmd);
> +
> +               if (!cmd->error) {
> +                       sd_rw_multi(host, mrq);
> +
> +                       if (mmc_op_multi(cmd->opcode) && mrq->stop) {
> +                               sd_send_cmd_get_rsp(host, mrq->stop);
> +                               rtsx_usb_write_register(ucr, MC_FIFO_CTL,
> +                                               FIFO_FLUSH, FIFO_FLUSH);
> +                       }
> +               }
> +       } else {
> +               sd_normal_rw(host, mrq);
> +       }
> +
> +       if (mrq->data) {
> +               if (cmd->error || data->error)
> +                       data->bytes_xfered = 0;
> +               else
> +                       data->bytes_xfered = data->blocks * data->blksz;
> +       }
> +
> +       mutex_unlock(&ucr->dev_mutex);
> +
> +finish_detect_card:
> +       if (cmd->error) {
> +               /*
> +                * detect card when fail to update card existence state and
> +                * speed up card removal when retry
> +                */
> +               sdmmc_get_cd(mmc);
> +               dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
> +       }
> +
> +finish:
> +       mutex_lock(&host->host_mutex);
> +       host->mrq = NULL;
> +       mutex_unlock(&host->host_mutex);
> +
> +       mmc_request_done(mmc, mrq);
> +}
> +
> +static int sd_set_bus_width(struct rtsx_usb_sdmmc *host,
> +               unsigned char bus_width)
> +{
> +       int err = 0;
> +       u8 width[] = {
> +               [MMC_BUS_WIDTH_1] = SD_BUS_WIDTH_1BIT,
> +               [MMC_BUS_WIDTH_4] = SD_BUS_WIDTH_4BIT,
> +               [MMC_BUS_WIDTH_8] = SD_BUS_WIDTH_8BIT,
> +       };
> +
> +       if (bus_width <= MMC_BUS_WIDTH_8)
> +               err = rtsx_usb_write_register(host->ucr, SD_CFG1,
> +                               0x03, width[bus_width]);
> +
> +       return err;
> +}
> +
> +static int sd_pull_ctl_disable_lqfp48(struct rtsx_ucr *ucr)
> +{
> +       rtsx_usb_init_cmd(ucr);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x55);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
> +
> +       return rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +}
> +
> +static int sd_pull_ctl_disable_qfn24(struct rtsx_ucr *ucr)
> +{
> +       rtsx_usb_init_cmd(ucr);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0x65);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x55);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0x95);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x56);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x59);
> +
> +       return rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +}
> +
> +static int sd_pull_ctl_enable_lqfp48(struct rtsx_ucr *ucr)
> +{
> +       rtsx_usb_init_cmd(ucr);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xAA);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0xAA);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA9);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x55);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x55);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0xA5);
> +
> +       return rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +}
> +
> +static int sd_pull_ctl_enable_qfn24(struct rtsx_ucr *ucr)
> +{
> +       rtsx_usb_init_cmd(ucr);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL1, 0xFF, 0xA5);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL2, 0xFF, 0x9A);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL3, 0xFF, 0xA5);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL4, 0xFF, 0x9A);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL5, 0xFF, 0x65);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PULL_CTL6, 0xFF, 0x5A);
> +
> +       return rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +}
> +
> +static int sd_power_on(struct rtsx_usb_sdmmc *host)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +
> +       dev_dbg(sdmmc_dev(host), "%s\n", __func__);
> +       rtsx_usb_init_cmd(ucr);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_SHARE_MODE,
> +                       CARD_SHARE_MASK, CARD_SHARE_SD);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN,
> +                       SD_CLK_EN, SD_CLK_EN);
> +       err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +       if (err)
> +               return err;
> +
> +       if (CHECK_PKG(ucr, LQFP48))
> +               err = sd_pull_ctl_enable_lqfp48(ucr);
> +       else
> +               err = sd_pull_ctl_enable_qfn24(ucr);
> +       if (err)
> +               return err;
> +
> +       err = rtsx_usb_write_register(ucr, CARD_PWR_CTL,
> +                       POWER_MASK, PARTIAL_POWER_ON);
> +       if (err)
> +               return err;
> +
> +       usleep_range(800, 1000);
> +
> +       rtsx_usb_init_cmd(ucr);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
> +                       POWER_MASK|LDO3318_PWR_MASK, POWER_ON|LDO_ON);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE,
> +                       SD_OUTPUT_EN, SD_OUTPUT_EN);
> +
> +       return rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +}
> +
> +static int sd_power_off(struct rtsx_usb_sdmmc *host)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +
> +       dev_dbg(sdmmc_dev(host), "%s\n", __func__);
> +       rtsx_usb_init_cmd(ucr);
> +
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_EN, SD_CLK_EN, 0);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_OE, SD_OUTPUT_EN, 0);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
> +                       POWER_MASK, POWER_OFF);
> +       rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_PWR_CTL,
> +                       POWER_MASK|LDO3318_PWR_MASK, POWER_OFF|LDO_SUSPEND);
> +
> +       err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +       if (err)
> +               return err;
> +
> +       if (CHECK_PKG(ucr, LQFP48))
> +                       return sd_pull_ctl_disable_lqfp48(ucr);
> +       return sd_pull_ctl_disable_qfn24(ucr);
> +}
> +
> +static int sd_set_power_mode(struct rtsx_usb_sdmmc *host,
> +               unsigned char power_mode)
> +{
> +       int err;
> +
> +       if (power_mode != MMC_POWER_OFF)
> +               power_mode = MMC_POWER_ON;
> +
> +       if (power_mode == host->power_mode)
> +               return 0;
> +
> +       if (power_mode == MMC_POWER_OFF) {
> +               err = sd_power_off(host);
> +               pm_runtime_put(sdmmc_dev(host));
> +       } else {
> +               pm_runtime_get_sync(sdmmc_dev(host));
> +               err = sd_power_on(host);
> +       }
> +
> +       if (!err)
> +               host->power_mode = power_mode;
> +
> +       return err;
> +}
> +
> +static int sd_set_timing(struct rtsx_usb_sdmmc *host,
> +               unsigned char timing, bool *ddr_mode)
> +{
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +
> +       *ddr_mode = false;
> +
> +       rtsx_usb_init_cmd(ucr);
> +
> +       switch (timing) {
> +       case MMC_TIMING_UHS_SDR104:
> +       case MMC_TIMING_UHS_SDR50:
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
> +                               0x0C | SD_ASYNC_FIFO_RST,
> +                               SD_30_MODE | SD_ASYNC_FIFO_RST);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
> +                               CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
> +               break;
> +
> +       case MMC_TIMING_UHS_DDR50:
> +               *ddr_mode = true;
> +
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
> +                               0x0C | SD_ASYNC_FIFO_RST,
> +                               SD_DDR_MODE | SD_ASYNC_FIFO_RST);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
> +                               CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
> +                               DDR_VAR_TX_CMD_DAT, DDR_VAR_TX_CMD_DAT);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
> +                               DDR_VAR_RX_DAT | DDR_VAR_RX_CMD,
> +                               DDR_VAR_RX_DAT | DDR_VAR_RX_CMD);
> +               break;
> +
> +       case MMC_TIMING_MMC_HS:
> +       case MMC_TIMING_SD_HS:
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_CFG1,
> +                               0x0C, SD_20_MODE);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
> +                               CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PUSH_POINT_CTL,
> +                               SD20_TX_SEL_MASK, SD20_TX_14_AHEAD);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
> +                               SD20_RX_SEL_MASK, SD20_RX_14_DELAY);
> +               break;
> +
> +       default:
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_CFG1, 0x0C, SD_20_MODE);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, CARD_CLK_SOURCE, 0xFF,
> +                               CRC_FIX_CLK | SD30_VAR_CLK0 | SAMPLE_VAR_CLK1);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD,
> +                               SD_PUSH_POINT_CTL, 0xFF, 0);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_SAMPLE_POINT_CTL,
> +                               SD20_RX_SEL_MASK, SD20_RX_POS_EDGE);
> +               break;
> +       }
> +
> +       err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +
> +       return err;
> +}
> +
> +static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
> +{
> +       struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
> +       struct rtsx_ucr *ucr = host->ucr;
> +
> +       dev_dbg(sdmmc_dev(host), "%s\n", __func__);
> +       mutex_lock(&ucr->dev_mutex);
> +
> +       if (rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD)) {
> +               mutex_unlock(&ucr->dev_mutex);
> +               return;
> +       }
> +
> +       sd_set_power_mode(host, ios->power_mode);
> +       sd_set_bus_width(host, ios->bus_width);
> +       sd_set_timing(host, ios->timing, &host->ddr_mode);
> +
> +       host->vpclk = false;
> +       host->double_clk = true;
> +
> +       switch (ios->timing) {
> +       case MMC_TIMING_UHS_SDR104:
> +       case MMC_TIMING_UHS_SDR50:
> +               host->ssc_depth = SSC_DEPTH_2M;
> +               host->vpclk = true;
> +               host->double_clk = false;
> +               break;
> +       case MMC_TIMING_UHS_DDR50:
> +       case MMC_TIMING_UHS_SDR25:
> +               host->ssc_depth = SSC_DEPTH_1M;
> +               break;
> +       default:
> +               host->ssc_depth = SSC_DEPTH_512K;
> +               break;
> +       }
> +
> +       host->initial_mode = (ios->clock <= 1000000) ? true : false;
> +       host->clock = ios->clock;
> +
> +       rtsx_usb_switch_clock(host->ucr, host->clock, host->ssc_depth,
> +                       host->initial_mode, host->double_clk, host->vpclk);
> +
> +       mutex_unlock(&ucr->dev_mutex);
> +       dev_dbg(sdmmc_dev(host), "%s end\n", __func__);
> +}
> +
> +static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
> +{
> +       struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err = 0;
> +
> +       dev_dbg(sdmmc_dev(host), "%s: signal_voltage = %d\n",
> +                       __func__, ios->signal_voltage);
> +
> +       if (host->host_removal)
> +               return -ENOMEDIUM;
> +
> +       if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120)
> +               return -EPERM;
> +
> +       mutex_lock(&ucr->dev_mutex);
> +
> +       err = rtsx_usb_card_exclusive_check(ucr, RTSX_USB_SD_CARD);
> +       if (err) {
> +               mutex_unlock(&ucr->dev_mutex);
> +               return err;
> +       }
> +
> +       /* Let mmc core do the busy checking, simply stop the forced-toggle
> +        * clock(while issuing CMD11) and switch voltage.
> +        */
> +       rtsx_usb_init_cmd(ucr);
> +
> +       if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
> +                               SD_IO_USING_1V8, SD_IO_USING_3V3);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
> +                               TUNE_SD18_MASK, TUNE_SD18_3V3);
> +       } else {
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_BUS_STAT,
> +                               SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
> +                               SD_CLK_FORCE_STOP);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, SD_PAD_CTL,
> +                               SD_IO_USING_1V8, SD_IO_USING_1V8);
> +               rtsx_usb_add_cmd(ucr, WRITE_REG_CMD, LDO_POWER_CFG,
> +                               TUNE_SD18_MASK, TUNE_SD18_1V8);
> +       }
> +
> +       err = rtsx_usb_send_cmd(ucr, MODE_C, 100);
> +       mutex_unlock(&ucr->dev_mutex);
> +
> +       return err;
> +}
> +
> +static int sdmmc_card_busy(struct mmc_host *mmc)
> +{
> +       struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err;
> +       u8 stat;
> +       u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS
> +               | SD_DAT0_STATUS;
> +
> +       dev_dbg(sdmmc_dev(host), "%s\n", __func__);
> +
> +       mutex_lock(&ucr->dev_mutex);
> +
> +       err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
> +                       SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP,
> +                       SD_CLK_TOGGLE_EN);
> +       if (err)
> +               goto out;
> +
> +       mdelay(1);
> +
> +       err = rtsx_usb_read_register(ucr, SD_BUS_STAT, &stat);
> +       if (err)
> +               goto out;
> +
> +       err = rtsx_usb_write_register(ucr, SD_BUS_STAT,
> +                       SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
> +out:
> +       mutex_unlock(&ucr->dev_mutex);
> +
> +       if (err)
> +               return err;
> +
> +       /* check if any pin between dat[0:3] is low */
> +       if ((stat & mask) != mask)
> +               return 1;
> +       else
> +               return 0;
> +}
> +
> +static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
> +{
> +       struct rtsx_usb_sdmmc *host = mmc_priv(mmc);
> +       struct rtsx_ucr *ucr = host->ucr;
> +       int err = 0;
> +
> +       if (host->host_removal)
> +               return -ENOMEDIUM;
> +
> +       mutex_lock(&ucr->dev_mutex);
> +
> +       if (!host->ddr_mode)
> +               err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
> +
> +       mutex_unlock(&ucr->dev_mutex);
> +
> +       return err;
> +}
> +
> +static const struct mmc_host_ops rtsx_usb_sdmmc_ops = {
> +       .request = sdmmc_request,
> +       .set_ios = sdmmc_set_ios,
> +       .get_ro = sdmmc_get_ro,
> +       .get_cd = sdmmc_get_cd,
> +       .start_signal_voltage_switch = sdmmc_switch_voltage,
> +       .card_busy = sdmmc_card_busy,
> +       .execute_tuning = sdmmc_execute_tuning,
> +};
> +
> +#ifdef RTSX_USB_USE_LEDS_CLASS
> +static void rtsx_usb_led_control(struct led_classdev *led,
> +       enum led_brightness brightness)
> +{
> +       struct rtsx_usb_sdmmc *host = container_of(led,
> +                       struct rtsx_usb_sdmmc, led);
> +
> +       if (host->host_removal)
> +               return;
> +
> +       host->led.brightness = brightness;
> +       schedule_work(&host->led_work);
> +}
> +
> +static void rtsx_usb_update_led(struct work_struct *work)
> +{
> +       struct rtsx_usb_sdmmc *host =
> +               container_of(work, struct rtsx_usb_sdmmc, led_work);
> +       struct rtsx_ucr *ucr = host->ucr;
> +
> +       mutex_lock(&ucr->dev_mutex);
> +
> +       if (host->led.brightness == LED_OFF)
> +               rtsx_usb_turn_off_led(ucr);
> +       else
> +               rtsx_usb_turn_on_led(ucr);
> +
> +       mutex_unlock(&ucr->dev_mutex);
> +}
> +#endif
> +
> +static void rtsx_usb_init_host(struct rtsx_usb_sdmmc *host)
> +{
> +       struct mmc_host *mmc = host->mmc;
> +
> +       mmc->f_min = 250000;
> +       mmc->f_max = 208000000;
> +       mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
> +       mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
> +               MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
> +               MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |
> +               MMC_CAP_NEEDS_POLL;
> +
> +       mmc->max_current_330 = 400;
> +       mmc->max_current_180 = 800;
> +       mmc->ops = &rtsx_usb_sdmmc_ops;
> +       mmc->max_segs = 256;
> +       mmc->max_seg_size = 65536;
> +       mmc->max_blk_size = 512;
> +       mmc->max_blk_count = 65535;
> +       mmc->max_req_size = 524288;
> +
> +       host->power_mode = MMC_POWER_OFF;
> +}
> +
> +static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
> +{
> +       struct mmc_host *mmc;
> +       struct rtsx_usb_sdmmc *host;
> +       struct rtsx_ucr *ucr;
> +#ifdef RTSX_USB_USE_LEDS_CLASS
> +       int err;
> +#endif
> +
> +       ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
> +       if (!ucr)
> +               return -ENXIO;
> +
> +       dev_dbg(&(pdev->dev), ": Realtek USB SD/MMC controller found\n");
> +
> +       mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
> +       if (!mmc)
> +               return -ENOMEM;
> +
> +       host = mmc_priv(mmc);
> +       host->ucr = ucr;
> +       host->mmc = mmc;
> +       host->pdev = pdev;
> +       platform_set_drvdata(pdev, host);
> +
> +       mutex_init(&host->host_mutex);
> +       rtsx_usb_init_host(host);
> +       pm_runtime_enable(&pdev->dev);
> +
> +#ifdef RTSX_USB_USE_LEDS_CLASS
> +       snprintf(host->led_name, sizeof(host->led_name),
> +               "%s::", mmc_hostname(mmc));
> +       host->led.name = host->led_name;
> +       host->led.brightness = LED_OFF;
> +       host->led.default_trigger = mmc_hostname(mmc);
> +       host->led.brightness_set = rtsx_usb_led_control;
> +
> +       err = led_classdev_register(mmc_dev(mmc), &host->led);
> +       if (err)
> +               dev_err(&(pdev->dev),
> +                               "Failed to register LED device: %d\n", err);
> +       INIT_WORK(&host->led_work, rtsx_usb_update_led);
> +
> +#endif
> +       mmc_add_host(mmc);
> +
> +       return 0;
> +}
> +
> +static int rtsx_usb_sdmmc_drv_remove(struct platform_device *pdev)
> +{
> +       struct rtsx_usb_sdmmc *host = platform_get_drvdata(pdev);
> +       struct mmc_host *mmc;
> +
> +       if (!host)
> +               return 0;
> +
> +       mmc = host->mmc;
> +       host->host_removal = true;
> +
> +       mutex_lock(&host->host_mutex);
> +       if (host->mrq) {
> +               dev_dbg(&(pdev->dev),
> +                       "%s: Controller removed during transfer\n",
> +                       mmc_hostname(mmc));
> +               host->mrq->cmd->error = -ENOMEDIUM;
> +               if (host->mrq->stop)
> +                       host->mrq->stop->error = -ENOMEDIUM;
> +               mmc_request_done(mmc, host->mrq);
> +       }
> +       mutex_unlock(&host->host_mutex);
> +
> +       mmc_remove_host(mmc);
> +
> +#ifdef RTSX_USB_USE_LEDS_CLASS
> +       cancel_work_sync(&host->led_work);
> +       led_classdev_unregister(&host->led);
> +#endif
> +
> +       mmc_free_host(mmc);
> +
> +       /* Balance possible unbalanced usage count
> +        * e.g. unconditional module removal
> +        */
> +       if (pm_runtime_active(&pdev->dev))
> +               pm_runtime_put(&pdev->dev);

This shouldn't be needed.

mmc_remove_host() will invoke your ->set_ios() callback with
power_mode set to MMC_POWER_OFF.

> +
> +       pm_runtime_disable(&pdev->dev);
> +       platform_set_drvdata(pdev, NULL);
> +
> +       dev_dbg(&(pdev->dev),
> +               ": Realtek USB SD/MMC module has been removed\n");
> +
> +       return 0;
> +}
> +
> +static struct platform_device_id rtsx_usb_sdmmc_ids[] = {
> +       {
> +               .name = "rtsx_usb_sdmmc",
> +       }, {
> +               /* sentinel */
> +       }
> +};
> +MODULE_DEVICE_TABLE(platform, rtsx_usb_sdmmc_ids);
> +
> +static struct platform_driver rtsx_usb_sdmmc_driver = {
> +       .probe          = rtsx_usb_sdmmc_drv_probe,
> +       .remove         = rtsx_usb_sdmmc_drv_remove,
> +       .id_table       = rtsx_usb_sdmmc_ids,
> +       .driver         = {
> +               .owner  = THIS_MODULE,
> +               .name   = "rtsx_usb_sdmmc",
> +       },
> +};
> +module_platform_driver(rtsx_usb_sdmmc_driver);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Roger Tseng <rogerable@realtek.com>");
> +MODULE_DESCRIPTION("Realtek USB SD/MMC Card Host Driver");
> --
> 1.8.2
>

Fix the minor thing above and you may add my ack!

Kind regards
Ulf Hansson