drivers/mfd/rtl8411.c - kernel/msm-4.19 - Gitiles

 /* 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 int rtl8411_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 {
 	u8 mask, val;

 	mask = (BPP_REG_TUNED18 << BPP_TUNED18_SHIFT_8411) | BPP_PAD_MASK;
 	if (voltage == OUTPUT_3V3)
 		val = (BPP_ASIC_3V3 << BPP_TUNED18_SHIFT_8411) | BPP_PAD_3V3;
 	else if (voltage == OUTPUT_1V8)
 		val = (BPP_ASIC_1V8 << BPP_TUNED18_SHIFT_8411) | BPP_PAD_1V8;
 	else
 		return -EINVAL;

 	return rtsx_pci_write_register(pcr, LDO_CTL, mask, val);
 }

 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 int rtl8411_conv_clk_and_div_n(int input, int dir)
 {
 	int output;

 	if (dir == CLK_TO_DIV_N)
 		output = input * 4 / 5 - 2;
 	else
 		output = (input + 2) * 5 / 4;

 	return output;
 }

 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,
 	.switch_output_voltage = rtl8411_switch_output_voltage,
 	.cd_deglitch = rtl8411_cd_deglitch,
 	.conv_clk_and_div_n = rtl8411_conv_clk_and_div_n,
 };

 /* 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;
 }
	/* 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 int rtl8411_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
	{
	u8 mask, val;

	mask = (BPP_REG_TUNED18 << BPP_TUNED18_SHIFT_8411) \| BPP_PAD_MASK;
	if (voltage == OUTPUT_3V3)
	val = (BPP_ASIC_3V3 << BPP_TUNED18_SHIFT_8411) \| BPP_PAD_3V3;
	else if (voltage == OUTPUT_1V8)
	val = (BPP_ASIC_1V8 << BPP_TUNED18_SHIFT_8411) \| BPP_PAD_1V8;
	else
	return -EINVAL;

	return rtsx_pci_write_register(pcr, LDO_CTL, mask, val);
	}

	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 int rtl8411_conv_clk_and_div_n(int input, int dir)
	{
	int output;

	if (dir == CLK_TO_DIV_N)
	output = input * 4 / 5 - 2;
	else
	output = (input + 2) * 5 / 4;

	return output;
	}

	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,
	.switch_output_voltage = rtl8411_switch_output_voltage,
	.cd_deglitch = rtl8411_cd_deglitch,
	.conv_clk_and_div_n = rtl8411_conv_clk_and_div_n,
	};

	/* 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;
	}