drivers/mfd/rts5209.c - linux - Git at Google

 /* Driver for Realtek PCI-Express card reader
  *
  * 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 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>
  */

 #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_fetch_vendor_settings(struct rtsx_pcr *pcr)
 {
 	u32 reg;

 	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
 	dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);

 	if (rts5209_vendor_setting1_valid(reg)) {
 		if (rts5209_reg_check_ms_pmos(reg))
 			pcr->flags |= PCR_MS_PMOS;
 		pcr->aspm_en = rts5209_reg_to_aspm(reg);
 	}

 	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, &reg);
 	dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);

 	if (rts5209_vendor_setting2_valid(reg)) {
 		pcr->sd30_drive_sel_1v8 =
 			rts5209_reg_to_sd30_drive_sel_1v8(reg);
 		pcr->sd30_drive_sel_3v3 =
 			rts5209_reg_to_sd30_drive_sel_3v3(reg);
 		pcr->card_drive_sel = rts5209_reg_to_card_drive_sel(reg);
 	}
 }

 static void rts5209_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
 {
 	rtsx_pci_write_register(pcr, FPDCTL, 0x07, 0x07);
 }

 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);
 	/* Reset ASPM state to default value */
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
 	/* Force CLKREQ# PIN to drive 0 to request clock */
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
 	/* Configure GPIO as output */
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03);
 	/* Configure driving */
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
 			0xFF, pcr->sd30_drive_sel_3v3);

 	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->flags & 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->flags & 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 int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 {
 	int err;

 	if (voltage == OUTPUT_3V3) {
 		err = rtsx_pci_write_register(pcr,
 				SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
 		if (err < 0)
 			return err;
 		err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
 		if (err < 0)
 			return err;
 	} else if (voltage == OUTPUT_1V8) {
 		err = rtsx_pci_write_register(pcr,
 				SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
 		if (err < 0)
 			return err;
 		err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
 		if (err < 0)
 			return err;
 	} else {
 		return -EINVAL;
 	}

 	return 0;
 }

 static const struct pcr_ops rts5209_pcr_ops = {
 	.fetch_vendor_settings = rts5209_fetch_vendor_settings,
 	.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,
 	.switch_output_voltage = rts5209_switch_output_voltage,
 	.cd_deglitch = NULL,
 	.conv_clk_and_div_n = NULL,
 	.force_power_down = rts5209_force_power_down,
 };

 /* 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;

 	pcr->flags = 0;
 	pcr->card_drive_sel = RTS5209_CARD_DRIVE_DEFAULT;
 	pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
 	pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
 	pcr->aspm_en = ASPM_L1_EN;
 	pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 16);
 	pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);

 	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;
 }
	/* Driver for Realtek PCI-Express card reader
	*
	* 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 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>
	*/

	#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_fetch_vendor_settings(struct rtsx_pcr *pcr)
	{
	u32 reg;

	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
	dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);

	if (rts5209_vendor_setting1_valid(reg)) {
	if (rts5209_reg_check_ms_pmos(reg))
	pcr->flags \|= PCR_MS_PMOS;
	pcr->aspm_en = rts5209_reg_to_aspm(reg);
	}

	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, &reg);
	dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);

	if (rts5209_vendor_setting2_valid(reg)) {
	pcr->sd30_drive_sel_1v8 =
	rts5209_reg_to_sd30_drive_sel_1v8(reg);
	pcr->sd30_drive_sel_3v3 =
	rts5209_reg_to_sd30_drive_sel_3v3(reg);
	pcr->card_drive_sel = rts5209_reg_to_card_drive_sel(reg);
	}
	}

	static void rts5209_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
	{
	rtsx_pci_write_register(pcr, FPDCTL, 0x07, 0x07);
	}

	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);
	/* Reset ASPM state to default value */
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
	/* Force CLKREQ# PIN to drive 0 to request clock */
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
	/* Configure GPIO as output */
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03);
	/* Configure driving */
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
	0xFF, pcr->sd30_drive_sel_3v3);

	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->flags & 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->flags & 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 int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
	{
	int err;

	if (voltage == OUTPUT_3V3) {
	err = rtsx_pci_write_register(pcr,
	SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
	if (err < 0)
	return err;
	err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 \| 0x24);
	if (err < 0)
	return err;
	} else if (voltage == OUTPUT_1V8) {
	err = rtsx_pci_write_register(pcr,
	SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
	if (err < 0)
	return err;
	err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 \| 0x24);
	if (err < 0)
	return err;
	} else {
	return -EINVAL;
	}

	return 0;
	}

	static const struct pcr_ops rts5209_pcr_ops = {
	.fetch_vendor_settings = rts5209_fetch_vendor_settings,
	.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,
	.switch_output_voltage = rts5209_switch_output_voltage,
	.cd_deglitch = NULL,
	.conv_clk_and_div_n = NULL,
	.force_power_down = rts5209_force_power_down,
	};

	/* 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;

	pcr->flags = 0;
	pcr->card_drive_sel = RTS5209_CARD_DRIVE_DEFAULT;
	pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
	pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
	pcr->aspm_en = ASPM_L1_EN;
	pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 16);
	pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);

	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;
	}