[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mfd / rts5229.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/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 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);
	/* 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);

	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);
	err = rtsx_pci_send_cmd(pcr, 100);
	if (err < 0)
		return err;

	return 0;
}

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_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
		if (err < 0)
			return err;
	} else if (voltage == OUTPUT_1V8) {
		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 = {
	.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,
};

/* 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->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;
}
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/delay.h>
	25	#include <linux/mfd/rtsx_pci.h>
	26
	27	#include "rtsx_pcr.h"
	28
	29	static u8 rts5229_get_ic_version(struct rtsx_pcr *pcr)
	30	{
	31	u8 val;
	32
	33	rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
	34	return val & 0x0F;
	35	}
	36
	37	static int rts5229_extra_init_hw(struct rtsx_pcr *pcr)
	38	{
	39	rtsx_pci_init_cmd(pcr);
	40
	41	/* Configure GPIO as output */
	42	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
	43	/* Switch LDO3318 source from DV33 to card_3v3 */
	44	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
	45	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
	46	/* LED shine disabled, set initial shine cycle period */
	47	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
	48
	49	return rtsx_pci_send_cmd(pcr, 100);
	50	}
	51
	52	static int rts5229_optimize_phy(struct rtsx_pcr *pcr)
	53	{
	54	/* Optimize RX sensitivity */
	55	return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
	56	}
	57
	58	static int rts5229_turn_on_led(struct rtsx_pcr *pcr)
	59	{
	60	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
	61	}
	62
	63	static int rts5229_turn_off_led(struct rtsx_pcr *pcr)
	64	{
65	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
66	}
67
68	static int rts5229_enable_auto_blink(struct rtsx_pcr *pcr)
69	{
70	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
71	}
72
73	static int rts5229_disable_auto_blink(struct rtsx_pcr *pcr)
74	{
75	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
76	}
77
78	static int rts5229_card_power_on(struct rtsx_pcr *pcr, int card)
79	{
80	int err;
81
82	rtsx_pci_init_cmd(pcr);
83	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
84	SD_POWER_MASK, SD_PARTIAL_POWER_ON);
85	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
86	LDO3318_PWR_MASK, 0x02);
87	err = rtsx_pci_send_cmd(pcr, 100);
88	if (err < 0)
89	return err;
90
91	/* To avoid too large in-rush current */
92	udelay(150);
93
94	rtsx_pci_init_cmd(pcr);
95	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
96	SD_POWER_MASK, SD_POWER_ON);
97	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
98	LDO3318_PWR_MASK, 0x06);
99	err = rtsx_pci_send_cmd(pcr, 100);
100	if (err < 0)
101	return err;
102
103	return 0;
104	}
105
106	static int rts5229_card_power_off(struct rtsx_pcr *pcr, int card)
107	{
108	rtsx_pci_init_cmd(pcr);
109	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
110	SD_POWER_MASK \| PMOS_STRG_MASK,
111	SD_POWER_OFF \| PMOS_STRG_400mA);
112	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
113	LDO3318_PWR_MASK, 0X00);
114	return rtsx_pci_send_cmd(pcr, 100);
115	}
116
d817ac4e WW	117	static int rts5229_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
	118	{
	119	int err;
	120
	121	if (voltage == OUTPUT_3V3) {
	122	err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 \| 0x24);
	123	if (err < 0)
	124	return err;
	125	} else if (voltage == OUTPUT_1V8) {
	126	err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 \| 0x24);
	127	if (err < 0)
	128	return err;
	129	} else {
	130	return -EINVAL;
	131	}
	132
	133	return 0;
	134	}
	135
67d16a46 WW	136	static const struct pcr_ops rts5229_pcr_ops = {
	137	.extra_init_hw = rts5229_extra_init_hw,
	138	.optimize_phy = rts5229_optimize_phy,
	139	.turn_on_led = rts5229_turn_on_led,
	140	.turn_off_led = rts5229_turn_off_led,
	141	.enable_auto_blink = rts5229_enable_auto_blink,
	142	.disable_auto_blink = rts5229_disable_auto_blink,
	143	.card_power_on = rts5229_card_power_on,
	144	.card_power_off = rts5229_card_power_off,
d817ac4e	145	.switch_output_voltage = rts5229_switch_output_voltage,
67d16a46 WW	146	.cd_deglitch = NULL,
	147	};
	148
	149	/* SD Pull Control Enable:
	150	* SD_DAT[3:0] ==> pull up
	151	* SD_CD ==> pull up
	152	* SD_WP ==> pull up
	153	* SD_CMD ==> pull up
	154	* SD_CLK ==> pull down
	155	*/
	156	static const u32 rts5229_sd_pull_ctl_enable_tbl1[] = {
	157	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
	158	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
	159	0,
	160	};
	161
	162	/* For RTS5229 version C */
	163	static const u32 rts5229_sd_pull_ctl_enable_tbl2[] = {
	164	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
	165	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD9),
	166	0,
	167	};
	168
	169	/* SD Pull Control Disable:
	170	* SD_DAT[3:0] ==> pull down
	171	* SD_CD ==> pull up
	172	* SD_WP ==> pull down
	173	* SD_CMD ==> pull down
	174	* SD_CLK ==> pull down
	175	*/
	176	static const u32 rts5229_sd_pull_ctl_disable_tbl1[] = {
	177	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	178	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
	179	0,
	180	};
	181
	182	/* For RTS5229 version C */
	183	static const u32 rts5229_sd_pull_ctl_disable_tbl2[] = {
	184	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	185	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE5),
	186	0,
	187	};
	188
	189	/* MS Pull Control Enable:
	190	* MS CD ==> pull up
	191	* others ==> pull down
	192	*/
	193	static const u32 rts5229_ms_pull_ctl_enable_tbl[] = {
	194	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
	195	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
	196	0,
	197	};
	198
	199	/* MS Pull Control Disable:
	200	* MS CD ==> pull up
	201	* others ==> pull down
	202	*/
	203	static const u32 rts5229_ms_pull_ctl_disable_tbl[] = {
	204	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
	205	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
	206	0,
	207	};
	208
	209	void rts5229_init_params(struct rtsx_pcr *pcr)
210	{
211	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 \| EXTRA_CAPS_SD_SDR104;
212	pcr->num_slots = 2;
213	pcr->ops = &rts5229_pcr_ops;
214
215	pcr->ic_version = rts5229_get_ic_version(pcr);
216	if (pcr->ic_version == IC_VER_C) {
217	pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl2;
218	pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl2;
219	} else {
220	pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl1;
221	pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl1;
222	}
223	pcr->ms_pull_ctl_enable_tbl = rts5229_ms_pull_ctl_enable_tbl;
224	pcr->ms_pull_ctl_disable_tbl = rts5229_ms_pull_ctl_disable_tbl;
225	}