tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
29static 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
37static 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
52static 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
64static int rts5209_optimize_phy(struct rtsx_pcr *pcr)
65{
66 return rtsx_pci_write_phy_register(pcr, 0x00, 0xB966);
67}
68
69static int rts5209_turn_on_led(struct rtsx_pcr *pcr)
70{
71 return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
72}
73
74static int rts5209_turn_off_led(struct rtsx_pcr *pcr)
75{
76 return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
77}
78
79static int rts5209_enable_auto_blink(struct rtsx_pcr *pcr)
80{
81 return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
82}
83
84static int rts5209_disable_auto_blink(struct rtsx_pcr *pcr)
85{
86 return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
87}
88
89static 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
127static 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
147static 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_register(pcr,
153 SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_D);
154 if (err < 0)
155 return err;
156 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
157 if (err < 0)
158 return err;
159 } else if (voltage == OUTPUT_1V8) {
160 err = rtsx_pci_write_register(pcr,
161 SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_B);
162 if (err < 0)
163 return err;
164 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
165 if (err < 0)
166 return err;
167 } else {
168 return -EINVAL;
169 }
170
171 return 0;
172}
173
174static const struct pcr_ops rts5209_pcr_ops = {
175 .extra_init_hw = rts5209_extra_init_hw,
176 .optimize_phy = rts5209_optimize_phy,
177 .turn_on_led = rts5209_turn_on_led,
178 .turn_off_led = rts5209_turn_off_led,
179 .enable_auto_blink = rts5209_enable_auto_blink,
180 .disable_auto_blink = rts5209_disable_auto_blink,
181 .card_power_on = rts5209_card_power_on,
182 .card_power_off = rts5209_card_power_off,
183 .switch_output_voltage = rts5209_switch_output_voltage,
184 .cd_deglitch = NULL,
185 .conv_clk_and_div_n = NULL,
186};
187
188/* SD Pull Control Enable:
189 * SD_DAT[3:0] ==> pull up
190 * SD_CD ==> pull up
191 * SD_WP ==> pull up
192 * SD_CMD ==> pull up
193 * SD_CLK ==> pull down
194 */
195static const u32 rts5209_sd_pull_ctl_enable_tbl[] = {
196 RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
197 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
198 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
199 0,
200};
201
202/* SD Pull Control Disable:
203 * SD_DAT[3:0] ==> pull down
204 * SD_CD ==> pull up
205 * SD_WP ==> pull down
206 * SD_CMD ==> pull down
207 * SD_CLK ==> pull down
208 */
209static const u32 rts5209_sd_pull_ctl_disable_tbl[] = {
210 RTSX_REG_PAIR(CARD_PULL_CTL1, 0x55),
211 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
212 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
213 0,
214};
215
216/* MS Pull Control Enable:
217 * MS CD ==> pull up
218 * others ==> pull down
219 */
220static const u32 rts5209_ms_pull_ctl_enable_tbl[] = {
221 RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
222 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
223 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
224 0,
225};
226
227/* MS Pull Control Disable:
228 * MS CD ==> pull up
229 * others ==> pull down
230 */
231static const u32 rts5209_ms_pull_ctl_disable_tbl[] = {
232 RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
233 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
234 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
235 0,
236};
237
238void rts5209_init_params(struct rtsx_pcr *pcr)
239{
240 pcr->extra_caps = EXTRA_CAPS_SD_SDR50 |
241 EXTRA_CAPS_SD_SDR104 | EXTRA_CAPS_MMC_8BIT;
242 pcr->num_slots = 2;
243 pcr->ops = &rts5209_pcr_ops;
244
245 rts5209_init_vendor_cfg(pcr);
246
247 pcr->ic_version = rts5209_get_ic_version(pcr);
248 pcr->sd_pull_ctl_enable_tbl = rts5209_sd_pull_ctl_enable_tbl;
249 pcr->sd_pull_ctl_disable_tbl = rts5209_sd_pull_ctl_disable_tbl;
250 pcr->ms_pull_ctl_enable_tbl = rts5209_ms_pull_ctl_enable_tbl;
251 pcr->ms_pull_ctl_disable_tbl = rts5209_ms_pull_ctl_disable_tbl;
252}