[linux.git] / drivers / mfd / rts5249.c

/* 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 <[email protected]>
 *   No. 128, West 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 rts5249_get_ic_version(struct rtsx_pcr *pcr)
{
	u8 val;

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

static int rts5249_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);
	/* Correct driving */
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
			SD30_CLK_DRIVE_SEL, 0xFF, 0x99);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
			SD30_CMD_DRIVE_SEL, 0xFF, 0x99);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
			SD30_DAT_DRIVE_SEL, 0xFF, 0x92);

	return rtsx_pci_send_cmd(pcr, 100);
}

static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
{
	int err;

	err = rtsx_pci_write_phy_register(pcr, PHY_REG_REV, 0xFE46);
	if (err < 0)
		return err;

	msleep(1);

	return rtsx_pci_write_phy_register(pcr, PHY_BPCR, 0x05C0);
}

static int rts5249_turn_on_led(struct rtsx_pcr *pcr)
{
	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
}

static int rts5249_turn_off_led(struct rtsx_pcr *pcr)
{
	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
}

static int rts5249_enable_auto_blink(struct rtsx_pcr *pcr)
{
	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
}

static int rts5249_disable_auto_blink(struct rtsx_pcr *pcr)
{
	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
}

static int rts5249_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_VCC_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;

	msleep(5);

	rtsx_pci_init_cmd(pcr);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
			SD_POWER_MASK, SD_VCC_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 rts5249_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, SD_POWER_OFF);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
			LDO3318_PWR_MASK, 0x00);
	return rtsx_pci_send_cmd(pcr, 100);
}

static int rts5249_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
{
	int err;
	u8 clk_drive, cmd_drive, dat_drive;

	if (voltage == OUTPUT_3V3) {
		err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4FC0 | 0x24);
		if (err < 0)
			return err;
		clk_drive = 0x99;
		cmd_drive = 0x99;
		dat_drive = 0x92;
	} else if (voltage == OUTPUT_1V8) {
		err = rtsx_pci_write_phy_register(pcr, PHY_BACR, 0x3C02);
		if (err < 0)
			return err;
		err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4C40 | 0x24);
		if (err < 0)
			return err;
		clk_drive = 0xb3;
		cmd_drive = 0xb3;
		dat_drive = 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, clk_drive);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL,
			0xFF, cmd_drive);
	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL,
			0xFF, dat_drive);
	return rtsx_pci_send_cmd(pcr, 100);
}

static const struct pcr_ops rts5249_pcr_ops = {
	.extra_init_hw = rts5249_extra_init_hw,
	.optimize_phy = rts5249_optimize_phy,
	.turn_on_led = rts5249_turn_on_led,
	.turn_off_led = rts5249_turn_off_led,
	.enable_auto_blink = rts5249_enable_auto_blink,
	.disable_auto_blink = rts5249_disable_auto_blink,
	.card_power_on = rts5249_card_power_on,
	.card_power_off = rts5249_card_power_off,
	.switch_output_voltage = rts5249_switch_output_voltage,
};

/* 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 rts5249_sd_pull_ctl_enable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0xAA),
	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 rts5249_sd_pull_ctl_disable_tbl[] = {
	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
	0,
};

/* MS Pull Control Enable:
 *     MS CD       ==> pull up
 *     others      ==> pull down
 */
static const u32 rts5249_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 rts5249_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 rts5249_init_params(struct rtsx_pcr *pcr)
{
	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
	pcr->num_slots = 2;
	pcr->ops = &rts5249_pcr_ops;

	pcr->ic_version = rts5249_get_ic_version(pcr);
	pcr->sd_pull_ctl_enable_tbl = rts5249_sd_pull_ctl_enable_tbl;
	pcr->sd_pull_ctl_disable_tbl = rts5249_sd_pull_ctl_disable_tbl;
	pcr->ms_pull_ctl_enable_tbl = rts5249_ms_pull_ctl_enable_tbl;
	pcr->ms_pull_ctl_disable_tbl = rts5249_ms_pull_ctl_disable_tbl;
}
Commit	Line	Data
4c4b8c10 WW	1	/* Driver for Realtek PCI-Express card reader
	2	*
	3	* Copyright(c) 2009-2013 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 <[email protected]>
	20	* No. 128, West 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 rts5249_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 rts5249_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	/* Correct driving */
	49	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
	50	SD30_CLK_DRIVE_SEL, 0xFF, 0x99);
	51	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
	52	SD30_CMD_DRIVE_SEL, 0xFF, 0x99);
	53	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
	54	SD30_DAT_DRIVE_SEL, 0xFF, 0x92);
	55
	56	return rtsx_pci_send_cmd(pcr, 100);
	57	}
	58
	59	static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
	60	{
	61	int err;
	62
	63	err = rtsx_pci_write_phy_register(pcr, PHY_REG_REV, 0xFE46);
	64	if (err < 0)
65	return err;
66
67	msleep(1);
68
69	return rtsx_pci_write_phy_register(pcr, PHY_BPCR, 0x05C0);
70	}
71
72	static int rts5249_turn_on_led(struct rtsx_pcr *pcr)
73	{
74	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
75	}
76
77	static int rts5249_turn_off_led(struct rtsx_pcr *pcr)
78	{
79	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
80	}
81
82	static int rts5249_enable_auto_blink(struct rtsx_pcr *pcr)
83	{
84	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
85	}
86
87	static int rts5249_disable_auto_blink(struct rtsx_pcr *pcr)
88	{
89	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
90	}
91
92	static int rts5249_card_power_on(struct rtsx_pcr *pcr, int card)
93	{
94	int err;
95
96	rtsx_pci_init_cmd(pcr);
97	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
98	SD_POWER_MASK, SD_VCC_PARTIAL_POWER_ON);
99	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
100	LDO3318_PWR_MASK, 0x02);
101	err = rtsx_pci_send_cmd(pcr, 100);
102	if (err < 0)
103	return err;
104
105	msleep(5);
106
107	rtsx_pci_init_cmd(pcr);
108	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
109	SD_POWER_MASK, SD_VCC_POWER_ON);
110	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
111	LDO3318_PWR_MASK, 0x06);
112	err = rtsx_pci_send_cmd(pcr, 100);
113	if (err < 0)
114	return err;
115
116	return 0;
117	}
118
119	static int rts5249_card_power_off(struct rtsx_pcr *pcr, int card)
120	{
121	rtsx_pci_init_cmd(pcr);
122	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
123	SD_POWER_MASK, SD_POWER_OFF);
124	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
125	LDO3318_PWR_MASK, 0x00);
126	return rtsx_pci_send_cmd(pcr, 100);
127	}
128
129	static int rts5249_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
130	{
131	int err;
132	u8 clk_drive, cmd_drive, dat_drive;
133
134	if (voltage == OUTPUT_3V3) {
135	err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4FC0 \| 0x24);
136	if (err < 0)
137	return err;
138	clk_drive = 0x99;
139	cmd_drive = 0x99;
140	dat_drive = 0x92;
141	} else if (voltage == OUTPUT_1V8) {
142	err = rtsx_pci_write_phy_register(pcr, PHY_BACR, 0x3C02);
143	if (err < 0)
144	return err;
145	err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4C40 \| 0x24);
146	if (err < 0)
147	return err;
148	clk_drive = 0xb3;
149	cmd_drive = 0xb3;
150	dat_drive = 0xb3;
151	} else {
152	return -EINVAL;
153	}
154
155	/* set pad drive */
156	rtsx_pci_init_cmd(pcr);
157	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CLK_DRIVE_SEL,
158	0xFF, clk_drive);
159	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL,
160	0xFF, cmd_drive);
161	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL,
162	0xFF, dat_drive);
163	return rtsx_pci_send_cmd(pcr, 100);
164	}
165
166	static const struct pcr_ops rts5249_pcr_ops = {
167	.extra_init_hw = rts5249_extra_init_hw,
168	.optimize_phy = rts5249_optimize_phy,
169	.turn_on_led = rts5249_turn_on_led,
170	.turn_off_led = rts5249_turn_off_led,
171	.enable_auto_blink = rts5249_enable_auto_blink,
172	.disable_auto_blink = rts5249_disable_auto_blink,
173	.card_power_on = rts5249_card_power_on,
174	.card_power_off = rts5249_card_power_off,
175	.switch_output_voltage = rts5249_switch_output_voltage,
176	};
177
178	/* SD Pull Control Enable:
179	* SD_DAT[3:0] ==> pull up
180	* SD_CD ==> pull up
181	* SD_WP ==> pull up
182	* SD_CMD ==> pull up
183	* SD_CLK ==> pull down
184	*/
185	static const u32 rts5249_sd_pull_ctl_enable_tbl[] = {
186	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
187	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
188	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
189	RTSX_REG_PAIR(CARD_PULL_CTL4, 0xAA),
190	0,
191	};
192
193	/* SD Pull Control Disable:
194	* SD_DAT[3:0] ==> pull down
195	* SD_CD ==> pull up
196	* SD_WP ==> pull down
197	* SD_CMD ==> pull down
198	* SD_CLK ==> pull down
199	*/
200	static const u32 rts5249_sd_pull_ctl_disable_tbl[] = {
201	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
202	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
203	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
204	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
205	0,
206	};
207
208	/* MS Pull Control Enable:
209	* MS CD ==> pull up
210	* others ==> pull down
211	*/
212	static const u32 rts5249_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 rts5249_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 rts5249_init_params(struct rtsx_pcr *pcr)
231	{
232	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 \| EXTRA_CAPS_SD_SDR104;
233	pcr->num_slots = 2;
234	pcr->ops = &rts5249_pcr_ops;
235
236	pcr->ic_version = rts5249_get_ic_version(pcr);
237	pcr->sd_pull_ctl_enable_tbl = rts5249_sd_pull_ctl_enable_tbl;
238	pcr->sd_pull_ctl_disable_tbl = rts5249_sd_pull_ctl_disable_tbl;
239	pcr->ms_pull_ctl_enable_tbl = rts5249_ms_pull_ctl_enable_tbl;
240	pcr->ms_pull_ctl_disable_tbl = rts5249_ms_pull_ctl_disable_tbl;
241	}