drivers/mfd/rts5229.c - kernel/quantenna - 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 rts5229_get_ic_version(struct rtsx_pcr *pcr)
 {
 	u8 val;

 	rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
 	return val & 0x0F;
 }

 static void rts5229_fetch_vendor_settings(struct rtsx_pcr *pcr)
 {
 	u32 reg;

 	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
 	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);

 	if (!rtsx_vendor_setting_valid(reg))
 		return;

 	pcr->aspm_en = rtsx_reg_to_aspm(reg);
 	pcr->sd30_drive_sel_1v8 =
 		map_sd_drive(rtsx_reg_to_sd30_drive_sel_1v8(reg));
 	pcr->card_drive_sel &= 0x3F;
 	pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg);

 	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, &reg);
 	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
 	pcr->sd30_drive_sel_3v3 =
 		map_sd_drive(rtsx_reg_to_sd30_drive_sel_3v3(reg));
 }

 static void rts5229_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
 {
 	rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
 }

 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);
 	/* 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);
 	/* 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 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 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);
 	return rtsx_pci_send_cmd(pcr, 100);
 }

 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 int rts5229_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 rts5229_pcr_ops = {
 	.fetch_vendor_settings = rts5229_fetch_vendor_settings,
 	.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,
 	.switch_output_voltage = rts5229_switch_output_voltage,
 	.cd_deglitch = NULL,
 	.conv_clk_and_div_n = NULL,
 	.force_power_down = rts5229_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 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->flags = 0;
 	pcr->card_drive_sel = RTSX_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, 15);
 	pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);

 	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;
 }
	/* 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 rts5229_get_ic_version(struct rtsx_pcr *pcr)
	{
	u8 val;

	rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
	return val & 0x0F;
	}

	static void rts5229_fetch_vendor_settings(struct rtsx_pcr *pcr)
	{
	u32 reg;

	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);

	if (!rtsx_vendor_setting_valid(reg))
	return;

	pcr->aspm_en = rtsx_reg_to_aspm(reg);
	pcr->sd30_drive_sel_1v8 =
	map_sd_drive(rtsx_reg_to_sd30_drive_sel_1v8(reg));
	pcr->card_drive_sel &= 0x3F;
	pcr->card_drive_sel \|= rtsx_reg_to_card_drive_sel(reg);

	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, &reg);
	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
	pcr->sd30_drive_sel_3v3 =
	map_sd_drive(rtsx_reg_to_sd30_drive_sel_3v3(reg));
	}

	static void rts5229_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
	{
	rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
	}

	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);
	/* 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);
	/* 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 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 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);
	return rtsx_pci_send_cmd(pcr, 100);
	}

	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 int rts5229_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 rts5229_pcr_ops = {
	.fetch_vendor_settings = rts5229_fetch_vendor_settings,
	.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,
	.switch_output_voltage = rts5229_switch_output_voltage,
	.cd_deglitch = NULL,
	.conv_clk_and_div_n = NULL,
	.force_power_down = rts5229_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 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->flags = 0;
	pcr->card_drive_sel = RTSX_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, 15);
	pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);

	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;
	}