[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mfd / rts5209.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 rts5209_get_ic_version(struct rtsx_pcr *pcr)
{
	u8 val;

	val = rtsx_pci_readb(pcr, 0x1C);
	return val & 0x0F;
}

static void rts5209_init_vendor_cfg(struct rtsx_pcr *pcr)
{
	u32 val;

	rtsx_pci_read_config_dword(pcr, 0x724, &val);
	dev_dbg(&(pcr->pci->dev), "Cfg 0x724: 0x%x\n", val);

	if (!(val & 0x80)) {
		if (val & 0x08)
			pcr->ms_pmos = false;
		else
			pcr->ms_pmos = true;
	}
}

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);
	/* Configure GPIO as output */
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03);

	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->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->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_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 rts5209_pcr_ops = {
	.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,
};

/* 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;

	rts5209_init_vendor_cfg(pcr);

	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;
}
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 rts5209_get_ic_version(struct rtsx_pcr *pcr)
	30	{
	31	u8 val;
	32
	33	val = rtsx_pci_readb(pcr, 0x1C);
	34	return val & 0x0F;
	35	}
	36
	37	static void rts5209_init_vendor_cfg(struct rtsx_pcr *pcr)
	38	{
	39	u32 val;
	40
	41	rtsx_pci_read_config_dword(pcr, 0x724, &val);
	42	dev_dbg(&(pcr->pci->dev), "Cfg 0x724: 0x%x\n", val);
	43
	44	if (!(val & 0x80)) {
	45	if (val & 0x08)
	46	pcr->ms_pmos = false;
	47	else
	48	pcr->ms_pmos = true;
	49	}
	50	}
	51
	52	static int rts5209_extra_init_hw(struct rtsx_pcr *pcr)
	53	{
	54	rtsx_pci_init_cmd(pcr);
	55
	56	/* Turn off LED */
	57	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO, 0xFF, 0x03);
	58	/* Configure GPIO as output */
	59	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03);
	60
	61	return rtsx_pci_send_cmd(pcr, 100);
	62	}
	63
	64	static int rts5209_optimize_phy(struct rtsx_pcr *pcr)
65	{
66	return rtsx_pci_write_phy_register(pcr, 0x00, 0xB966);
67	}
68
69	static int rts5209_turn_on_led(struct rtsx_pcr *pcr)
70	{
71	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
72	}
73
74	static int rts5209_turn_off_led(struct rtsx_pcr *pcr)
75	{
76	return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
77	}
78
79	static int rts5209_enable_auto_blink(struct rtsx_pcr *pcr)
80	{
81	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
82	}
83
84	static int rts5209_disable_auto_blink(struct rtsx_pcr *pcr)
85	{
86	return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
87	}
88
89	static int rts5209_card_power_on(struct rtsx_pcr *pcr, int card)
90	{
91	int err;
92	u8 pwr_mask, partial_pwr_on, pwr_on;
93
94	pwr_mask = SD_POWER_MASK;
95	partial_pwr_on = SD_PARTIAL_POWER_ON;
96	pwr_on = SD_POWER_ON;
97
98	if (pcr->ms_pmos && (card == RTSX_MS_CARD)) {
99	pwr_mask = MS_POWER_MASK;
100	partial_pwr_on = MS_PARTIAL_POWER_ON;
101	pwr_on = MS_POWER_ON;
102	}
103
104	rtsx_pci_init_cmd(pcr);
105	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
106	pwr_mask, partial_pwr_on);
107	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
108	LDO3318_PWR_MASK, 0x04);
109	err = rtsx_pci_send_cmd(pcr, 100);
110	if (err < 0)
111	return err;
112
113	/* To avoid too large in-rush current */
114	udelay(150);
115
116	rtsx_pci_init_cmd(pcr);
117	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, pwr_mask, pwr_on);
118	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
119	LDO3318_PWR_MASK, 0x00);
120	err = rtsx_pci_send_cmd(pcr, 100);
121	if (err < 0)
122	return err;
123
124	return 0;
125	}
126
127	static int rts5209_card_power_off(struct rtsx_pcr *pcr, int card)
128	{
129	u8 pwr_mask, pwr_off;
130
131	pwr_mask = SD_POWER_MASK;
132	pwr_off = SD_POWER_OFF;
133
134	if (pcr->ms_pmos && (card == RTSX_MS_CARD)) {
135	pwr_mask = MS_POWER_MASK;
136	pwr_off = MS_POWER_OFF;
137	}
138
139	rtsx_pci_init_cmd(pcr);
140	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
141	pwr_mask \| PMOS_STRG_MASK, pwr_off \| PMOS_STRG_400mA);
142	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
143	LDO3318_PWR_MASK, 0X06);
144	return rtsx_pci_send_cmd(pcr, 100);
145	}
146
d817ac4e WW	147	static int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
	148	{
	149	int err;
	150
	151	if (voltage == OUTPUT_3V3) {
	152	err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 \| 0x24);
	153	if (err < 0)
	154	return err;
	155	} else if (voltage == OUTPUT_1V8) {
	156	err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 \| 0x24);
	157	if (err < 0)
	158	return err;
	159	} else {
	160	return -EINVAL;
	161	}
	162
	163	return 0;
	164	}
	165
67d16a46 WW	166	static const struct pcr_ops rts5209_pcr_ops = {
	167	.extra_init_hw = rts5209_extra_init_hw,
	168	.optimize_phy = rts5209_optimize_phy,
	169	.turn_on_led = rts5209_turn_on_led,
	170	.turn_off_led = rts5209_turn_off_led,
	171	.enable_auto_blink = rts5209_enable_auto_blink,
	172	.disable_auto_blink = rts5209_disable_auto_blink,
	173	.card_power_on = rts5209_card_power_on,
	174	.card_power_off = rts5209_card_power_off,
d817ac4e	175	.switch_output_voltage = rts5209_switch_output_voltage,
67d16a46	176	.cd_deglitch = NULL,
ab4e8f8b	177	.conv_clk_and_div_n = NULL,
67d16a46 WW	178	};
	179
	180	/* SD Pull Control Enable:
	181	* SD_DAT[3:0] ==> pull up
	182	* SD_CD ==> pull up
	183	* SD_WP ==> pull up
	184	* SD_CMD ==> pull up
	185	* SD_CLK ==> pull down
	186	*/
	187	static const u32 rts5209_sd_pull_ctl_enable_tbl[] = {
	188	RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
	189	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
	190	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
	191	0,
	192	};
	193
	194	/* SD Pull Control Disable:
	195	* SD_DAT[3:0] ==> pull down
	196	* SD_CD ==> pull up
	197	* SD_WP ==> pull down
	198	* SD_CMD ==> pull down
	199	* SD_CLK ==> pull down
	200	*/
	201	static const u32 rts5209_sd_pull_ctl_disable_tbl[] = {
	202	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x55),
	203	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	204	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
	205	0,
	206	};
	207
	208	/* MS Pull Control Enable:
	209	* MS CD ==> pull up
	210	* others ==> pull down
	211	*/
	212	static const u32 rts5209_ms_pull_ctl_enable_tbl[] = {
	213	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
	214	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
	215	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
	216	0,
	217	};
	218
	219	/* MS Pull Control Disable:
	220	* MS CD ==> pull up
	221	* others ==> pull down
	222	*/
	223	static const u32 rts5209_ms_pull_ctl_disable_tbl[] = {
	224	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
	225	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
	226	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
	227	0,
	228	};
	229
	230	void rts5209_init_params(struct rtsx_pcr *pcr)
	231	{
	232	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 \|
	233	EXTRA_CAPS_SD_SDR104 \| EXTRA_CAPS_MMC_8BIT;
	234	pcr->num_slots = 2;
	235	pcr->ops = &rts5209_pcr_ops;
	236
	237	rts5209_init_vendor_cfg(pcr);
	238
	239	pcr->ic_version = rts5209_get_ic_version(pcr);
	240	pcr->sd_pull_ctl_enable_tbl = rts5209_sd_pull_ctl_enable_tbl;
	241	pcr->sd_pull_ctl_disable_tbl = rts5209_sd_pull_ctl_disable_tbl;
242	pcr->ms_pull_ctl_enable_tbl = rts5209_ms_pull_ctl_enable_tbl;
243	pcr->ms_pull_ctl_disable_tbl = rts5209_ms_pull_ctl_disable_tbl;
244	}