[mirror_ubuntu-bionic-kernel.git] / drivers / mfd / rtl8411.c

/* 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 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,
};

/* 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;
}
Commit	Line	Data
67d16a46 WW	1	/* Driver for Realtek PCI-Express card reader
	2	*
	3	* Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License as published by the
	7	* Free Software Foundation; either version 2, or (at your option) any
	8	* later version.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, see <http://www.gnu.org/licenses/>.
	17	*
	18	* Author:
	19	* Wei WANG <wei_wang@realsil.com.cn>
	20	* No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
	21	*/
	22
	23	#include <linux/module.h>
	24	#include <linux/bitops.h>
	25	#include <linux/delay.h>
	26	#include <linux/mfd/rtsx_pci.h>
	27
	28	#include "rtsx_pcr.h"
	29
	30	static u8 rtl8411_get_ic_version(struct rtsx_pcr *pcr)
	31	{
	32	u8 val;
	33
	34	rtsx_pci_read_register(pcr, SYS_VER, &val);
	35	return val & 0x0F;
	36	}
	37
	38	static int rtl8411_extra_init_hw(struct rtsx_pcr *pcr)
	39	{
	40	return rtsx_pci_write_register(pcr, CD_PAD_CTL,
	41	CD_DISABLE_MASK \| CD_AUTO_DISABLE, CD_ENABLE);
	42	}
	43
	44	static int rtl8411_turn_on_led(struct rtsx_pcr *pcr)
	45	{
	46	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
	47	}
	48
	49	static int rtl8411_turn_off_led(struct rtsx_pcr *pcr)
	50	{
	51	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
	52	}
	53
	54	static int rtl8411_enable_auto_blink(struct rtsx_pcr *pcr)
	55	{
	56	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
	57	}
	58
	59	static int rtl8411_disable_auto_blink(struct rtsx_pcr *pcr)
	60	{
	61	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
	62	}
	63
	64	static int rtl8411_card_power_on(struct rtsx_pcr *pcr, int card)
65	{
66	int err;
67
68	rtsx_pci_init_cmd(pcr);
69	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
70	BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON);
71	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_CTL,
72	BPP_LDO_POWB, BPP_LDO_SUSPEND);
73	err = rtsx_pci_send_cmd(pcr, 100);
74	if (err < 0)
75	return err;
76
77	/* To avoid too large in-rush current */
78	udelay(150);
79
80	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
81	BPP_POWER_MASK, BPP_POWER_10_PERCENT_ON);
82	if (err < 0)
83	return err;
84
85	udelay(150);
86
87	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
88	BPP_POWER_MASK, BPP_POWER_15_PERCENT_ON);
89	if (err < 0)
90	return err;
91
92	udelay(150);
93
94	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
95	BPP_POWER_MASK, BPP_POWER_ON);
96	if (err < 0)
97	return err;
98
99	return rtsx_pci_write_register(pcr, LDO_CTL, BPP_LDO_POWB, BPP_LDO_ON);
100	}
101
102	static int rtl8411_card_power_off(struct rtsx_pcr *pcr, int card)
103	{
104	int err;
105
106	err = rtsx_pci_write_register(pcr, CARD_PWR_CTL,
107	BPP_POWER_MASK, BPP_POWER_OFF);
108	if (err < 0)
109	return err;
110
111	return rtsx_pci_write_register(pcr, LDO_CTL,
112	BPP_LDO_POWB, BPP_LDO_SUSPEND);
113	}
114
d817ac4e WW	115	static int rtl8411_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
	116	{
	117	u8 mask, val;
	118
	119	mask = (BPP_REG_TUNED18 << BPP_TUNED18_SHIFT_8411) \| BPP_PAD_MASK;
	120	if (voltage == OUTPUT_3V3)
	121	val = (BPP_ASIC_3V3 << BPP_TUNED18_SHIFT_8411) \| BPP_PAD_3V3;
	122	else if (voltage == OUTPUT_1V8)
	123	val = (BPP_ASIC_1V8 << BPP_TUNED18_SHIFT_8411) \| BPP_PAD_1V8;
	124	else
	125	return -EINVAL;
	126
	127	return rtsx_pci_write_register(pcr, LDO_CTL, mask, val);
	128	}
	129
67d16a46 WW	130	static unsigned int rtl8411_cd_deglitch(struct rtsx_pcr *pcr)
	131	{
	132	unsigned int card_exist;
	133
	134	card_exist = rtsx_pci_readl(pcr, RTSX_BIPR);
	135	card_exist &= CARD_EXIST;
	136	if (!card_exist) {
	137	/* Enable card CD */
	138	rtsx_pci_write_register(pcr, CD_PAD_CTL,
	139	CD_DISABLE_MASK, CD_ENABLE);
	140	/* Enable card interrupt */
	141	rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x00);
	142	return 0;
	143	}
	144
	145	if (hweight32(card_exist) > 1) {
	146	rtsx_pci_write_register(pcr, CARD_PWR_CTL,
	147	BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON);
	148	msleep(100);
	149
	150	card_exist = rtsx_pci_readl(pcr, RTSX_BIPR);
	151	if (card_exist & MS_EXIST)
	152	card_exist = MS_EXIST;
	153	else if (card_exist & SD_EXIST)
	154	card_exist = SD_EXIST;
	155	else
	156	card_exist = 0;
	157
	158	rtsx_pci_write_register(pcr, CARD_PWR_CTL,
	159	BPP_POWER_MASK, BPP_POWER_OFF);
	160
	161	dev_dbg(&(pcr->pci->dev),
	162	"After CD deglitch, card_exist = 0x%x\n",
	163	card_exist);
	164	}
	165
	166	if (card_exist & MS_EXIST) {
	167	/* Disable SD interrupt */
	168	rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x40);
	169	rtsx_pci_write_register(pcr, CD_PAD_CTL,
	170	CD_DISABLE_MASK, MS_CD_EN_ONLY);
	171	} else if (card_exist & SD_EXIST) {
	172	/* Disable MS interrupt */
	173	rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x80);
	174	rtsx_pci_write_register(pcr, CD_PAD_CTL,
	175	CD_DISABLE_MASK, SD_CD_EN_ONLY);
	176	}
	177
	178	return card_exist;
	179	}
	180
	181	static const struct pcr_ops rtl8411_pcr_ops = {
	182	.extra_init_hw = rtl8411_extra_init_hw,
	183	.optimize_phy = NULL,
	184	.turn_on_led = rtl8411_turn_on_led,
	185	.turn_off_led = rtl8411_turn_off_led,
	186	.enable_auto_blink = rtl8411_enable_auto_blink,
	187	.disable_auto_blink = rtl8411_disable_auto_blink,
	188	.card_power_on = rtl8411_card_power_on,
	189	.card_power_off = rtl8411_card_power_off,
d817ac4e	190	.switch_output_voltage = rtl8411_switch_output_voltage,
67d16a46 WW	191	.cd_deglitch = rtl8411_cd_deglitch,
	192	};
	193
	194	/* SD Pull Control Enable:
	195	* SD_DAT[3:0] ==> pull up
	196	* SD_CD ==> pull up
	197	* SD_WP ==> pull up
	198	* SD_CMD ==> pull up
	199	* SD_CLK ==> pull down
	200	*/
	201	static const u32 rtl8411_sd_pull_ctl_enable_tbl[] = {
	202	RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
	203	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
	204	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xA9),
	205	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
	206	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x09),
	207	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
	208	0,
	209	};
	210
	211	/* SD Pull Control Disable:
	212	* SD_DAT[3:0] ==> pull down
	213	* SD_CD ==> pull up
	214	* SD_WP ==> pull down
	215	* SD_CMD ==> pull down
	216	* SD_CLK ==> pull down
	217	*/
	218	static const u32 rtl8411_sd_pull_ctl_disable_tbl[] = {
	219	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	220	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	221	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
	222	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
	223	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
	224	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
	225	0,
	226	};
	227
	228	/* MS Pull Control Enable:
	229	* MS CD ==> pull up
	230	* others ==> pull down
	231	*/
	232	static const u32 rtl8411_ms_pull_ctl_enable_tbl[] = {
	233	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	234	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	235	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
	236	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x05),
	237	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
	238	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
	239	0,
	240	};
	241
	242	/* MS Pull Control Disable:
	243	* MS CD ==> pull up
	244	* others ==> pull down
	245	*/
	246	static const u32 rtl8411_ms_pull_ctl_disable_tbl[] = {
	247	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65),
	248	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	249	RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95),
	250	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09),
	251	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05),
	252	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04),
	253	0,
	254	};
255
256	void rtl8411_init_params(struct rtsx_pcr *pcr)
257	{
258	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 \| EXTRA_CAPS_SD_SDR104;
259	pcr->num_slots = 2;
260	pcr->ops = &rtl8411_pcr_ops;
261
262	pcr->ic_version = rtl8411_get_ic_version(pcr);
263	pcr->sd_pull_ctl_enable_tbl = rtl8411_sd_pull_ctl_enable_tbl;
264	pcr->sd_pull_ctl_disable_tbl = rtl8411_sd_pull_ctl_disable_tbl;
265	pcr->ms_pull_ctl_enable_tbl = rtl8411_ms_pull_ctl_enable_tbl;
266	pcr->ms_pull_ctl_disable_tbl = rtl8411_ms_pull_ctl_disable_tbl;
267	}