mfd: Add realtek pcie card reader driver

Realtek PCI-E card reader driver adapts requests from upper-level
sdmmc/memstick layer to the real physical card reader.

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/Kconfig

@@ -63,6 +63,15 @@ config MFD_SM501_GPIO
 	 lines on the SM501. The platform data is used to supply the
 	 base number for the first GPIO line to register.
 
+config MFD_RTSX_PCI
+	tristate "Support for Realtek PCI-E card reader"
+	depends on PCI
+	help
+	  This supports for Realtek PCI-Express card reader including rts5209,
+	  rts5229, rtl8411, etc. Realtek card reader supports access to many
+	  types of memory cards, such as Memory Stick, Memory Stick Pro,
+	  Secure Digital and MultiMediaCard.
+
 config MFD_ASIC3
 	bool "Support for Compaq ASIC3"
 	depends on GENERIC_HARDIRQS && GPIOLIB && ARM

drivers/mfd/Makefile

@@ -9,6 +9,9 @@ obj-$(CONFIG_MFD_88PM805)	+= 88pm805.o 88pm80x.o
 obj-$(CONFIG_MFD_SM501)		+= sm501.o
 obj-$(CONFIG_MFD_ASIC3)		+= asic3.o tmio_core.o
 
+rtsx_pci-objs			:= rtsx_pcr.o rts5209.o rts5229.o rtl8411.o
+obj-$(CONFIG_MFD_RTSX_PCI)	+= rtsx_pci.o
+
 obj-$(CONFIG_HTC_EGPIO)		+= htc-egpio.o
 obj-$(CONFIG_HTC_PASIC3)	+= htc-pasic3.o
 obj-$(CONFIG_HTC_I2CPLD)	+= htc-i2cpld.o

drivers/mfd/rtl8411.c

@@ -0,0 +1,251 @@
+/* Driver for Realtek PCI-Express card reader
+ *
+ * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ *   Wei WANG <wei_wang@realsil.com.cn>
+ *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/mfd/rtsx_pci.h>
+
+#include "rtsx_pcr.h"
+
+static u8 rtl8411_get_ic_version(struct rtsx_pcr *pcr)
+{
+	u8 val;
+
+	rtsx_pci_read_register(pcr, SYS_VER, &val);
+	return val & 0x0F;
+}
+
+static int rtl8411_extra_init_hw(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CD_PAD_CTL,
+			CD_DISABLE_MASK | CD_AUTO_DISABLE, CD_ENABLE);
+}
+
+static int rtl8411_turn_on_led(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
+}
+
+static int rtl8411_turn_off_led(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
+}
+
+static int rtl8411_enable_auto_blink(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
+}
+
+static int rtl8411_disable_auto_blink(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
+}
+
+static int rtl8411_card_power_on(struct rtsx_pcr *pcr, int card)
+{
+	int err;
+
+	rtsx_pci_init_cmd(pcr);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+			BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_CTL,
+			BPP_LDO_POWB, BPP_LDO_SUSPEND);
+	err = rtsx_pci_send_cmd(pcr, 100);
+	if (err < 0)
+		return err;
+
+	/* To avoid too large in-rush current */
+	udelay(150);
+
+	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
+			BPP_POWER_MASK, BPP_POWER_10_PERCENT_ON);
+	if (err < 0)
+		return err;
+
+	udelay(150);
+
+	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
+			BPP_POWER_MASK, BPP_POWER_15_PERCENT_ON);
+	if (err < 0)
+		return err;
+
+	udelay(150);
+
+	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
+			BPP_POWER_MASK, BPP_POWER_ON);
+	if (err < 0)
+		return err;
+
+	return rtsx_pci_write_register(pcr, LDO_CTL, BPP_LDO_POWB, BPP_LDO_ON);
+}
+
+static int rtl8411_card_power_off(struct rtsx_pcr *pcr, int card)
+{
+	int err;
+
+	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
+			BPP_POWER_MASK, BPP_POWER_OFF);
+	if (err < 0)
+		return err;
+
+	return rtsx_pci_write_register(pcr, LDO_CTL,
+			BPP_LDO_POWB, BPP_LDO_SUSPEND);
+}
+
+static unsigned int rtl8411_cd_deglitch(struct rtsx_pcr *pcr)
+{
+	unsigned int card_exist;
+
+	card_exist = rtsx_pci_readl(pcr, RTSX_BIPR);
+	card_exist &= CARD_EXIST;
+	if (!card_exist) {
+		/* Enable card CD */
+		rtsx_pci_write_register(pcr, CD_PAD_CTL,
+				CD_DISABLE_MASK, CD_ENABLE);
+		/* Enable card interrupt */
+		rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x00);
+		return 0;
+	}
+
+	if (hweight32(card_exist) > 1) {
+		rtsx_pci_write_register(pcr, CARD_PWR_CTL,
+				BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON);
+		msleep(100);
+
+		card_exist = rtsx_pci_readl(pcr, RTSX_BIPR);
+		if (card_exist & MS_EXIST)
+			card_exist = MS_EXIST;
+		else if (card_exist & SD_EXIST)
+			card_exist = SD_EXIST;
+		else
+			card_exist = 0;
+
+		rtsx_pci_write_register(pcr, CARD_PWR_CTL,
+				BPP_POWER_MASK, BPP_POWER_OFF);
+
+		dev_dbg(&(pcr->pci->dev),
+				"After CD deglitch, card_exist = 0x%x\n",
+				card_exist);
+	}
+
+	if (card_exist & MS_EXIST) {
+		/* Disable SD interrupt */
+		rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x40);
+		rtsx_pci_write_register(pcr, CD_PAD_CTL,
+				CD_DISABLE_MASK, MS_CD_EN_ONLY);
+	} else if (card_exist & SD_EXIST) {
+		/* Disable MS interrupt */
+		rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x80);
+		rtsx_pci_write_register(pcr, CD_PAD_CTL,
+				CD_DISABLE_MASK, SD_CD_EN_ONLY);
+	}
+
+	return card_exist;
+}
+
+static const struct pcr_ops rtl8411_pcr_ops = {
+	.extra_init_hw = rtl8411_extra_init_hw,
+	.optimize_phy = NULL,
+	.turn_on_led = rtl8411_turn_on_led,
+	.turn_off_led = rtl8411_turn_off_led,
+	.enable_auto_blink = rtl8411_enable_auto_blink,
+	.disable_auto_blink = rtl8411_disable_auto_blink,
+	.card_power_on = rtl8411_card_power_on,
+	.card_power_off = rtl8411_card_power_off,
+	.cd_deglitch = rtl8411_cd_deglitch,
+};
+
+/* SD Pull Control Enable:
+ *     SD_DAT[3:0] ==> pull up
+ *     SD_CD       ==> pull up
+ *     SD_WP       ==> pull up
+ *     SD_CMD      ==> pull up
+ *     SD_CLK      ==> pull down
+ */
+static const u32 rtl8411_sd_pull_ctl_enable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xA9),
+	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
+	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x09),
+	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
+	0,
+};
+
+/* SD Pull Control Disable:
+ *     SD_DAT[3:0] ==> pull down
+ *     SD_CD       ==> pull up
+ *     SD_WP       ==> pull down
+ *     SD_CMD      ==> pull down
+ *     SD_CLK      ==> pull down
+ */
+static const u32 rtl8411_sd_pull_ctl_disable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
+	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
+	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
+	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
+	0,
+};
+
+/* MS Pull Control Enable:
+ *     MS CD       ==> pull up
+ *     others      ==> pull down
+ */
+static const u32 rtl8411_ms_pull_ctl_enable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
+	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x05),
+	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
+	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
+	0,
+};
+
+/* MS Pull Control Disable:
+ *     MS CD       ==> pull up
+ *     others      ==> pull down
+ */
+static const u32 rtl8411_ms_pull_ctl_disable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
+	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
+	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
+	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
+	0,
+};
+
+void rtl8411_init_params(struct rtsx_pcr *pcr)
+{
+	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
+	pcr->num_slots = 2;
+	pcr->ops = &rtl8411_pcr_ops;
+
+	pcr->ic_version = rtl8411_get_ic_version(pcr);
+	pcr->sd_pull_ctl_enable_tbl = rtl8411_sd_pull_ctl_enable_tbl;
+	pcr->sd_pull_ctl_disable_tbl = rtl8411_sd_pull_ctl_disable_tbl;
+	pcr->ms_pull_ctl_enable_tbl = rtl8411_ms_pull_ctl_enable_tbl;
+	pcr->ms_pull_ctl_disable_tbl = rtl8411_ms_pull_ctl_disable_tbl;
+}

drivers/mfd/rts5209.c

@@ -0,0 +1,223 @@
+/* Driver for Realtek PCI-Express card reader
+ *
+ * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ *   Wei WANG <wei_wang@realsil.com.cn>
+ *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/mfd/rtsx_pci.h>
+
+#include "rtsx_pcr.h"
+
+static u8 rts5209_get_ic_version(struct rtsx_pcr *pcr)
+{
+	u8 val;
+
+	val = rtsx_pci_readb(pcr, 0x1C);
+	return val & 0x0F;
+}
+
+static void rts5209_init_vendor_cfg(struct rtsx_pcr *pcr)
+{
+	u32 val;
+
+	rtsx_pci_read_config_dword(pcr, 0x724, &val);
+	dev_dbg(&(pcr->pci->dev), "Cfg 0x724: 0x%x\n", val);
+
+	if (!(val & 0x80)) {
+		if (val & 0x08)
+			pcr->ms_pmos = false;
+		else
+			pcr->ms_pmos = true;
+	}
+}
+
+static int rts5209_extra_init_hw(struct rtsx_pcr *pcr)
+{
+	rtsx_pci_init_cmd(pcr);
+
+	/* Turn off LED */
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO, 0xFF, 0x03);
+	/* Configure GPIO as output */
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03);
+
+	return rtsx_pci_send_cmd(pcr, 100);
+}
+
+static int rts5209_optimize_phy(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_phy_register(pcr, 0x00, 0xB966);
+}
+
+static int rts5209_turn_on_led(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
+}
+
+static int rts5209_turn_off_led(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
+}
+
+static int rts5209_enable_auto_blink(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
+}
+
+static int rts5209_disable_auto_blink(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
+}
+
+static int rts5209_card_power_on(struct rtsx_pcr *pcr, int card)
+{
+	int err;
+	u8 pwr_mask, partial_pwr_on, pwr_on;
+
+	pwr_mask = SD_POWER_MASK;
+	partial_pwr_on = SD_PARTIAL_POWER_ON;
+	pwr_on = SD_POWER_ON;
+
+	if (pcr->ms_pmos && (card == RTSX_MS_CARD)) {
+		pwr_mask = MS_POWER_MASK;
+		partial_pwr_on = MS_PARTIAL_POWER_ON;
+		pwr_on = MS_POWER_ON;
+	}
+
+	rtsx_pci_init_cmd(pcr);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+			pwr_mask, partial_pwr_on);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+			LDO3318_PWR_MASK, 0x04);
+	err = rtsx_pci_send_cmd(pcr, 100);
+	if (err < 0)
+		return err;
+
+	/* To avoid too large in-rush current */
+	udelay(150);
+
+	rtsx_pci_init_cmd(pcr);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, pwr_mask, pwr_on);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+			LDO3318_PWR_MASK, 0x00);
+	err = rtsx_pci_send_cmd(pcr, 100);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static int rts5209_card_power_off(struct rtsx_pcr *pcr, int card)
+{
+	u8 pwr_mask, pwr_off;
+
+	pwr_mask = SD_POWER_MASK;
+	pwr_off = SD_POWER_OFF;
+
+	if (pcr->ms_pmos && (card == RTSX_MS_CARD)) {
+		pwr_mask = MS_POWER_MASK;
+		pwr_off = MS_POWER_OFF;
+	}
+
+	rtsx_pci_init_cmd(pcr);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+			pwr_mask | PMOS_STRG_MASK, pwr_off | PMOS_STRG_400mA);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+			LDO3318_PWR_MASK, 0X06);
+	return rtsx_pci_send_cmd(pcr, 100);
+}
+
+static const struct pcr_ops rts5209_pcr_ops = {
+	.extra_init_hw = rts5209_extra_init_hw,
+	.optimize_phy = rts5209_optimize_phy,
+	.turn_on_led = rts5209_turn_on_led,
+	.turn_off_led = rts5209_turn_off_led,
+	.enable_auto_blink = rts5209_enable_auto_blink,
+	.disable_auto_blink = rts5209_disable_auto_blink,
+	.card_power_on = rts5209_card_power_on,
+	.card_power_off = rts5209_card_power_off,
+	.cd_deglitch = NULL,
+};
+
+/* SD Pull Control Enable:
+ *     SD_DAT[3:0] ==> pull up
+ *     SD_CD       ==> pull up
+ *     SD_WP       ==> pull up
+ *     SD_CMD      ==> pull up
+ *     SD_CLK      ==> pull down
+ */
+static const u32 rts5209_sd_pull_ctl_enable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
+	0,
+};
+
+/* SD Pull Control Disable:
+ *     SD_DAT[3:0] ==> pull down
+ *     SD_CD       ==> pull up
+ *     SD_WP       ==> pull down
+ *     SD_CMD      ==> pull down
+ *     SD_CLK      ==> pull down
+ */
+static const u32 rts5209_sd_pull_ctl_disable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
+	0,
+};
+
+/* MS Pull Control Enable:
+ *     MS CD       ==> pull up
+ *     others      ==> pull down
+ */
+static const u32 rts5209_ms_pull_ctl_enable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
+	0,
+};
+
+/* MS Pull Control Disable:
+ *     MS CD       ==> pull up
+ *     others      ==> pull down
+ */
+static const u32 rts5209_ms_pull_ctl_disable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
+	0,
+};
+
+void rts5209_init_params(struct rtsx_pcr *pcr)
+{
+	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 |
+		EXTRA_CAPS_SD_SDR104 | EXTRA_CAPS_MMC_8BIT;
+	pcr->num_slots = 2;
+	pcr->ops = &rts5209_pcr_ops;
+
+	rts5209_init_vendor_cfg(pcr);
+
+	pcr->ic_version = rts5209_get_ic_version(pcr);
+	pcr->sd_pull_ctl_enable_tbl = rts5209_sd_pull_ctl_enable_tbl;
+	pcr->sd_pull_ctl_disable_tbl = rts5209_sd_pull_ctl_disable_tbl;
+	pcr->ms_pull_ctl_enable_tbl = rts5209_ms_pull_ctl_enable_tbl;
+	pcr->ms_pull_ctl_disable_tbl = rts5209_ms_pull_ctl_disable_tbl;
+}

drivers/mfd/rts5229.c

@@ -0,0 +1,205 @@
+/* Driver for Realtek PCI-Express card reader
+ *
+ * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ *   Wei WANG <wei_wang@realsil.com.cn>
+ *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/mfd/rtsx_pci.h>
+
+#include "rtsx_pcr.h"
+
+static u8 rts5229_get_ic_version(struct rtsx_pcr *pcr)
+{
+	u8 val;
+
+	rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
+	return val & 0x0F;
+}
+
+static int rts5229_extra_init_hw(struct rtsx_pcr *pcr)
+{
+	rtsx_pci_init_cmd(pcr);
+
+	/* Configure GPIO as output */
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
+	/* Switch LDO3318 source from DV33 to card_3v3 */
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
+	/* LED shine disabled, set initial shine cycle period */
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
+
+	return rtsx_pci_send_cmd(pcr, 100);
+}
+
+static int rts5229_optimize_phy(struct rtsx_pcr *pcr)
+{
+	/* Optimize RX sensitivity */
+	return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
+}
+
+static int rts5229_turn_on_led(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
+}
+
+static int rts5229_turn_off_led(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
+}
+
+static int rts5229_enable_auto_blink(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
+}
+
+static int rts5229_disable_auto_blink(struct rtsx_pcr *pcr)
+{
+	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
+}
+
+static int rts5229_card_power_on(struct rtsx_pcr *pcr, int card)
+{
+	int err;
+
+	rtsx_pci_init_cmd(pcr);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+			SD_POWER_MASK, SD_PARTIAL_POWER_ON);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+			LDO3318_PWR_MASK, 0x02);
+	err = rtsx_pci_send_cmd(pcr, 100);
+	if (err < 0)
+		return err;
+
+	/* To avoid too large in-rush current */
+	udelay(150);
+
+	rtsx_pci_init_cmd(pcr);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+			SD_POWER_MASK, SD_POWER_ON);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+			LDO3318_PWR_MASK, 0x06);
+	err = rtsx_pci_send_cmd(pcr, 100);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static int rts5229_card_power_off(struct rtsx_pcr *pcr, int card)
+{
+	rtsx_pci_init_cmd(pcr);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
+			SD_POWER_MASK | PMOS_STRG_MASK,
+			SD_POWER_OFF | PMOS_STRG_400mA);
+	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
+			LDO3318_PWR_MASK, 0X00);
+	return rtsx_pci_send_cmd(pcr, 100);
+}
+
+static const struct pcr_ops rts5229_pcr_ops = {
+	.extra_init_hw = rts5229_extra_init_hw,
+	.optimize_phy = rts5229_optimize_phy,
+	.turn_on_led = rts5229_turn_on_led,
+	.turn_off_led = rts5229_turn_off_led,
+	.enable_auto_blink = rts5229_enable_auto_blink,
+	.disable_auto_blink = rts5229_disable_auto_blink,
+	.card_power_on = rts5229_card_power_on,
+	.card_power_off = rts5229_card_power_off,
+	.cd_deglitch = NULL,
+};
+
+/* SD Pull Control Enable:
+ *     SD_DAT[3:0] ==> pull up
+ *     SD_CD       ==> pull up
+ *     SD_WP       ==> pull up
+ *     SD_CMD      ==> pull up
+ *     SD_CLK      ==> pull down
+ */
+static const u32 rts5229_sd_pull_ctl_enable_tbl1[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
+	0,
+};
+
+/* For RTS5229 version C */
+static const u32 rts5229_sd_pull_ctl_enable_tbl2[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD9),
+	0,
+};
+
+/* SD Pull Control Disable:
+ *     SD_DAT[3:0] ==> pull down
+ *     SD_CD       ==> pull up
+ *     SD_WP       ==> pull down
+ *     SD_CMD      ==> pull down
+ *     SD_CLK      ==> pull down
+ */
+static const u32 rts5229_sd_pull_ctl_disable_tbl1[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
+	0,
+};
+
+/* For RTS5229 version C */
+static const u32 rts5229_sd_pull_ctl_disable_tbl2[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE5),
+	0,
+};
+
+/* MS Pull Control Enable:
+ *     MS CD       ==> pull up
+ *     others      ==> pull down
+ */
+static const u32 rts5229_ms_pull_ctl_enable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
+	0,
+};
+
+/* MS Pull Control Disable:
+ *     MS CD       ==> pull up
+ *     others      ==> pull down
+ */
+static const u32 rts5229_ms_pull_ctl_disable_tbl[] = {
+	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
+	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
+	0,
+};
+
+void rts5229_init_params(struct rtsx_pcr *pcr)
+{
+	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
+	pcr->num_slots = 2;
+	pcr->ops = &rts5229_pcr_ops;
+
+	pcr->ic_version = rts5229_get_ic_version(pcr);
+	if (pcr->ic_version == IC_VER_C) {
+		pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl2;
+		pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl2;
+	} else {
+		pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl1;
+		pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl1;
+	}
+	pcr->ms_pull_ctl_enable_tbl = rts5229_ms_pull_ctl_enable_tbl;
+	pcr->ms_pull_ctl_disable_tbl = rts5229_ms_pull_ctl_disable_tbl;
+}

drivers/mfd/rtsx_pcr.h

@@ -0,0 +1,32 @@
+/* Driver for Realtek PCI-Express card reader
+ *
+ * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ *   Wei WANG <wei_wang@realsil.com.cn>
+ *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#ifndef __RTSX_PCR_H
+#define __RTSX_PCR_H
+
+#include <linux/mfd/rtsx_pci.h>
+
+void rts5209_init_params(struct rtsx_pcr *pcr);
+void rts5229_init_params(struct rtsx_pcr *pcr);
+void rtl8411_init_params(struct rtsx_pcr *pcr);
+
+#endif

include/linux/mfd/rtsx_common.h

@@ -0,0 +1,48 @@
+/* Driver for Realtek driver-based card reader
+ *
+ * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ *   Wei WANG <wei_wang@realsil.com.cn>
+ *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#ifndef __RTSX_COMMON_H
+#define __RTSX_COMMON_H
+
+#define DRV_NAME_RTSX_PCI		"rtsx_pci"
+#define DRV_NAME_RTSX_PCI_SDMMC		"rtsx_pci_sdmmc"
+#define DRV_NAME_RTSX_PCI_MS		"rtsx_pci_ms"
+
+#define RTSX_REG_PAIR(addr, val)	(((u32)(addr) << 16) | (u8)(val))
+
+#define RTSX_SSC_DEPTH_4M		0x01
+#define RTSX_SSC_DEPTH_2M		0x02
+#define RTSX_SSC_DEPTH_1M		0x03
+#define RTSX_SSC_DEPTH_500K		0x04
+#define RTSX_SSC_DEPTH_250K		0x05
+
+#define RTSX_SD_CARD			0
+#define RTSX_MS_CARD			1
+
+struct platform_device;
+
+struct rtsx_slot {
+	struct platform_device	*p_dev;
+	void			(*card_event)(struct platform_device *p_dev);
+};
+
+#endif