drivers/mfd/rts5227.c - arm/linux - Git at Google

 /* 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
  *
  *   Roger Tseng <rogerable@realtek.com>
  *   No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
  */

 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/mfd/rtsx_pci.h>

 #include "rtsx_pcr.h"

 static int rts5227_extra_init_hw(struct rtsx_pcr *pcr)
 {
 	u16 cap;

 	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);
 	/* Configure LTR */
 	pcie_capability_read_word(pcr->pci, PCI_EXP_DEVCTL2, &cap);
 	if (cap & PCI_EXP_DEVCTL2_LTR_EN)
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LTR_CTL, 0xFF, 0xA3);
 	/* Configure OBFF */
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OBFF_CFG, 0x03, 0x03);
 	/* Configure force_clock_req
 	 * Maybe We should define 0xFF03 as some name
 	 */
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, 0xFF03, 0x08, 0x08);
 	/* Correct driving */
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 			SD30_CLK_DRIVE_SEL, 0xFF, 0x96);
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 			SD30_CMD_DRIVE_SEL, 0xFF, 0x96);
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
 			SD30_DAT_DRIVE_SEL, 0xFF, 0x96);

 	return rtsx_pci_send_cmd(pcr, 100);
 }

 static int rts5227_optimize_phy(struct rtsx_pcr *pcr)
 {
 	/* Optimize RX sensitivity */
 	return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
 }

 static int rts5227_turn_on_led(struct rtsx_pcr *pcr)
 {
 	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
 }

 static int rts5227_turn_off_led(struct rtsx_pcr *pcr)
 {
 	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
 }

 static int rts5227_enable_auto_blink(struct rtsx_pcr *pcr)
 {
 	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
 }

 static int rts5227_disable_auto_blink(struct rtsx_pcr *pcr)
 {
 	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
 }

 static int rts5227_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 rts5227_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 int rts5227_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 {
 	int err;
 	u8 drive_sel;

 	if (voltage == OUTPUT_3V3) {
 		err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
 		if (err < 0)
 			return err;
 		drive_sel = 0x96;
 	} else if (voltage == OUTPUT_1V8) {
 		err = rtsx_pci_write_phy_register(pcr, 0x11, 0x3C02);
 		if (err < 0)
 			return err;
 		err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C80 | 0x24);
 		if (err < 0)
 			return err;
 		drive_sel = 0xB3;
 	} else {
 		return -EINVAL;
 	}

 	/* set pad drive */
 	rtsx_pci_init_cmd(pcr);
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CLK_DRIVE_SEL,
 			0xFF, drive_sel);
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL,
 			0xFF, drive_sel);
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL,
 			0xFF, drive_sel);
 	return rtsx_pci_send_cmd(pcr, 100);
 }

 static const struct pcr_ops rts5227_pcr_ops = {
 	.extra_init_hw = rts5227_extra_init_hw,
 	.optimize_phy = rts5227_optimize_phy,
 	.turn_on_led = rts5227_turn_on_led,
 	.turn_off_led = rts5227_turn_off_led,
 	.enable_auto_blink = rts5227_enable_auto_blink,
 	.disable_auto_blink = rts5227_disable_auto_blink,
 	.card_power_on = rts5227_card_power_on,
 	.card_power_off = rts5227_card_power_off,
 	.switch_output_voltage = rts5227_switch_output_voltage,
 	.cd_deglitch = NULL,
 	.conv_clk_and_div_n = 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 rts5227_sd_pull_ctl_enable_tbl[] = {
 	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 rts5227_sd_pull_ctl_disable_tbl[] = {
 	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 rts5227_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 rts5227_ms_pull_ctl_disable_tbl[] = {
 	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
 	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
 	0,
 };

 void rts5227_init_params(struct rtsx_pcr *pcr)
 {
 	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
 	pcr->num_slots = 2;
 	pcr->ops = &rts5227_pcr_ops;

 	pcr->sd_pull_ctl_enable_tbl = rts5227_sd_pull_ctl_enable_tbl;
 	pcr->sd_pull_ctl_disable_tbl = rts5227_sd_pull_ctl_disable_tbl;
 	pcr->ms_pull_ctl_enable_tbl = rts5227_ms_pull_ctl_enable_tbl;
 	pcr->ms_pull_ctl_disable_tbl = rts5227_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
	*
	* Roger Tseng <rogerable@realtek.com>
	* No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
	*/

	#include <linux/module.h>
	#include <linux/delay.h>
	#include <linux/mfd/rtsx_pci.h>

	#include "rtsx_pcr.h"

	static int rts5227_extra_init_hw(struct rtsx_pcr *pcr)
	{
	u16 cap;

	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);
	/* Configure LTR */
	pcie_capability_read_word(pcr->pci, PCI_EXP_DEVCTL2, &cap);
	if (cap & PCI_EXP_DEVCTL2_LTR_EN)
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LTR_CTL, 0xFF, 0xA3);
	/* Configure OBFF */
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OBFF_CFG, 0x03, 0x03);
	/* Configure force_clock_req
	* Maybe We should define 0xFF03 as some name
	*/
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, 0xFF03, 0x08, 0x08);
	/* Correct driving */
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
	SD30_CLK_DRIVE_SEL, 0xFF, 0x96);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
	SD30_CMD_DRIVE_SEL, 0xFF, 0x96);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
	SD30_DAT_DRIVE_SEL, 0xFF, 0x96);

	return rtsx_pci_send_cmd(pcr, 100);
	}

	static int rts5227_optimize_phy(struct rtsx_pcr *pcr)
	{
	/* Optimize RX sensitivity */
	return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
	}

	static int rts5227_turn_on_led(struct rtsx_pcr *pcr)
	{
	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
	}

	static int rts5227_turn_off_led(struct rtsx_pcr *pcr)
	{
	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
	}

	static int rts5227_enable_auto_blink(struct rtsx_pcr *pcr)
	{
	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
	}

	static int rts5227_disable_auto_blink(struct rtsx_pcr *pcr)
	{
	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
	}

	static int rts5227_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 rts5227_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 int rts5227_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
	{
	int err;
	u8 drive_sel;

	if (voltage == OUTPUT_3V3) {
	err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 \| 0x24);
	if (err < 0)
	return err;
	drive_sel = 0x96;
	} else if (voltage == OUTPUT_1V8) {
	err = rtsx_pci_write_phy_register(pcr, 0x11, 0x3C02);
	if (err < 0)
	return err;
	err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C80 \| 0x24);
	if (err < 0)
	return err;
	drive_sel = 0xB3;
	} else {
	return -EINVAL;
	}

	/* set pad drive */
	rtsx_pci_init_cmd(pcr);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CLK_DRIVE_SEL,
	0xFF, drive_sel);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL,
	0xFF, drive_sel);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL,
	0xFF, drive_sel);
	return rtsx_pci_send_cmd(pcr, 100);
	}

	static const struct pcr_ops rts5227_pcr_ops = {
	.extra_init_hw = rts5227_extra_init_hw,
	.optimize_phy = rts5227_optimize_phy,
	.turn_on_led = rts5227_turn_on_led,
	.turn_off_led = rts5227_turn_off_led,
	.enable_auto_blink = rts5227_enable_auto_blink,
	.disable_auto_blink = rts5227_disable_auto_blink,
	.card_power_on = rts5227_card_power_on,
	.card_power_off = rts5227_card_power_off,
	.switch_output_voltage = rts5227_switch_output_voltage,
	.cd_deglitch = NULL,
	.conv_clk_and_div_n = 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 rts5227_sd_pull_ctl_enable_tbl[] = {
	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 rts5227_sd_pull_ctl_disable_tbl[] = {
	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 rts5227_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 rts5227_ms_pull_ctl_disable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
	0,
	};

	void rts5227_init_params(struct rtsx_pcr *pcr)
	{
	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 \| EXTRA_CAPS_SD_SDR104;
	pcr->num_slots = 2;
	pcr->ops = &rts5227_pcr_ops;

	pcr->sd_pull_ctl_enable_tbl = rts5227_sd_pull_ctl_enable_tbl;
	pcr->sd_pull_ctl_disable_tbl = rts5227_sd_pull_ctl_disable_tbl;
	pcr->ms_pull_ctl_enable_tbl = rts5227_ms_pull_ctl_enable_tbl;
	pcr->ms_pull_ctl_disable_tbl = rts5227_ms_pull_ctl_disable_tbl;
	}