blob: 29d889cbb9c5183262897bc5e29818c536bb227d [file] [log] [blame]
Wei WANG67d16a42012-11-09 20:53:33 +08001/* 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
29static 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
37static 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
52static 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
58static int rts5229_turn_on_led(struct rtsx_pcr *pcr)
59{
60 return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
61}
62
63static int rts5229_turn_off_led(struct rtsx_pcr *pcr)
64{
65 return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
66}
67
68static int rts5229_enable_auto_blink(struct rtsx_pcr *pcr)
69{
70 return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
71}
72
73static int rts5229_disable_auto_blink(struct rtsx_pcr *pcr)
74{
75 return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
76}
77
78static 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
106static 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
Wei WANGd817ac42013-01-23 09:51:04 +0800117static 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
Wei WANG67d16a42012-11-09 20:53:33 +0800136static 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,
Wei WANGd817ac42013-01-23 09:51:04 +0800145 .switch_output_voltage = rts5229_switch_output_voltage,
Wei WANG67d16a42012-11-09 20:53:33 +0800146 .cd_deglitch = NULL,
Wei WANGab4e8f82013-01-23 09:51:06 +0800147 .conv_clk_and_div_n = NULL,
Wei WANG67d16a42012-11-09 20:53:33 +0800148};
149
150/* SD Pull Control Enable:
151 * SD_DAT[3:0] ==> pull up
152 * SD_CD ==> pull up
153 * SD_WP ==> pull up
154 * SD_CMD ==> pull up
155 * SD_CLK ==> pull down
156 */
157static const u32 rts5229_sd_pull_ctl_enable_tbl1[] = {
158 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
159 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
160 0,
161};
162
163/* For RTS5229 version C */
164static const u32 rts5229_sd_pull_ctl_enable_tbl2[] = {
165 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
166 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD9),
167 0,
168};
169
170/* SD Pull Control Disable:
171 * SD_DAT[3:0] ==> pull down
172 * SD_CD ==> pull up
173 * SD_WP ==> pull down
174 * SD_CMD ==> pull down
175 * SD_CLK ==> pull down
176 */
177static const u32 rts5229_sd_pull_ctl_disable_tbl1[] = {
178 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
179 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
180 0,
181};
182
183/* For RTS5229 version C */
184static const u32 rts5229_sd_pull_ctl_disable_tbl2[] = {
185 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
186 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE5),
187 0,
188};
189
190/* MS Pull Control Enable:
191 * MS CD ==> pull up
192 * others ==> pull down
193 */
194static const u32 rts5229_ms_pull_ctl_enable_tbl[] = {
195 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
196 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
197 0,
198};
199
200/* MS Pull Control Disable:
201 * MS CD ==> pull up
202 * others ==> pull down
203 */
204static const u32 rts5229_ms_pull_ctl_disable_tbl[] = {
205 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
206 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
207 0,
208};
209
210void rts5229_init_params(struct rtsx_pcr *pcr)
211{
212 pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
213 pcr->num_slots = 2;
214 pcr->ops = &rts5229_pcr_ops;
215
216 pcr->ic_version = rts5229_get_ic_version(pcr);
217 if (pcr->ic_version == IC_VER_C) {
218 pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl2;
219 pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl2;
220 } else {
221 pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl1;
222 pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl1;
223 }
224 pcr->ms_pull_ctl_enable_tbl = rts5229_ms_pull_ctl_enable_tbl;
225 pcr->ms_pull_ctl_disable_tbl = rts5229_ms_pull_ctl_disable_tbl;
226}