tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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 * Roger Tseng <rogerable@realtek.com>
23 * No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
24 */
25
26#include <linux/module.h>
27#include <linux/delay.h>
28#include <linux/mfd/rtsx_pci.h>
29
30#include "rtsx_pcr.h"
31
32static int rts5227_extra_init_hw(struct rtsx_pcr *pcr)
33{
34 u16 cap;
35
36 rtsx_pci_init_cmd(pcr);
37
38 /* Configure GPIO as output */
39 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
40 /* Switch LDO3318 source from DV33 to card_3v3 */
41 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
42 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
43 /* LED shine disabled, set initial shine cycle period */
44 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
45 /* Configure LTR */
46 pcie_capability_read_word(pcr->pci, PCI_EXP_DEVCTL2, &cap);
47 if (cap & PCI_EXP_LTR_EN)
48 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LTR_CTL, 0xFF, 0xA3);
49 /* Configure OBFF */
50 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OBFF_CFG, 0x03, 0x03);
51 /* Configure force_clock_req
52 * Maybe We should define 0xFF03 as some name
53 */
54 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, 0xFF03, 0x08, 0x08);
55 /* Correct driving */
56 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
57 SD30_CLK_DRIVE_SEL, 0xFF, 0x96);
58 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
59 SD30_CMD_DRIVE_SEL, 0xFF, 0x96);
60 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
61 SD30_DAT_DRIVE_SEL, 0xFF, 0x96);
62
63 return rtsx_pci_send_cmd(pcr, 100);
64}
65
66static int rts5227_optimize_phy(struct rtsx_pcr *pcr)
67{
68 /* Optimize RX sensitivity */
69 return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
70}
71
72static int rts5227_turn_on_led(struct rtsx_pcr *pcr)
73{
74 return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
75}
76
77static int rts5227_turn_off_led(struct rtsx_pcr *pcr)
78{
79 return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
80}
81
82static int rts5227_enable_auto_blink(struct rtsx_pcr *pcr)
83{
84 return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
85}
86
87static int rts5227_disable_auto_blink(struct rtsx_pcr *pcr)
88{
89 return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
90}
91
92static int rts5227_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_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 /* To avoid too large in-rush current */
106 udelay(150);
107
108 rtsx_pci_init_cmd(pcr);
109 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
110 SD_POWER_MASK, SD_POWER_ON);
111 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
112 LDO3318_PWR_MASK, 0x06);
113 err = rtsx_pci_send_cmd(pcr, 100);
114 if (err < 0)
115 return err;
116
117 return 0;
118}
119
120static int rts5227_card_power_off(struct rtsx_pcr *pcr, int card)
121{
122 rtsx_pci_init_cmd(pcr);
123 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
124 SD_POWER_MASK | PMOS_STRG_MASK,
125 SD_POWER_OFF | PMOS_STRG_400mA);
126 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
127 LDO3318_PWR_MASK, 0X00);
128 return rtsx_pci_send_cmd(pcr, 100);
129}
130
131static int rts5227_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
132{
133 int err;
134 u8 drive_sel;
135
136 if (voltage == OUTPUT_3V3) {
137 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
138 if (err < 0)
139 return err;
140 drive_sel = 0x96;
141 } else if (voltage == OUTPUT_1V8) {
142 err = rtsx_pci_write_phy_register(pcr, 0x11, 0x3C02);
143 if (err < 0)
144 return err;
145 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C80 | 0x24);
146 if (err < 0)
147 return err;
148 drive_sel = 0xB3;
149 } else {
150 return -EINVAL;
151 }
152
153 /* set pad drive */
154 rtsx_pci_init_cmd(pcr);
155 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CLK_DRIVE_SEL,
156 0xFF, drive_sel);
157 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL,
158 0xFF, drive_sel);
159 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL,
160 0xFF, drive_sel);
161 return rtsx_pci_send_cmd(pcr, 100);
162}
163
164static const struct pcr_ops rts5227_pcr_ops = {
165 .extra_init_hw = rts5227_extra_init_hw,
166 .optimize_phy = rts5227_optimize_phy,
167 .turn_on_led = rts5227_turn_on_led,
168 .turn_off_led = rts5227_turn_off_led,
169 .enable_auto_blink = rts5227_enable_auto_blink,
170 .disable_auto_blink = rts5227_disable_auto_blink,
171 .card_power_on = rts5227_card_power_on,
172 .card_power_off = rts5227_card_power_off,
173 .switch_output_voltage = rts5227_switch_output_voltage,
174 .cd_deglitch = NULL,
175 .conv_clk_and_div_n = NULL,
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 */
185static const u32 rts5227_sd_pull_ctl_enable_tbl[] = {
186 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
187 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
188 0,
189};
190
191/* SD Pull Control Disable:
192 * SD_DAT[3:0] ==> pull down
193 * SD_CD ==> pull up
194 * SD_WP ==> pull down
195 * SD_CMD ==> pull down
196 * SD_CLK ==> pull down
197 */
198static const u32 rts5227_sd_pull_ctl_disable_tbl[] = {
199 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
200 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
201 0,
202};
203
204/* MS Pull Control Enable:
205 * MS CD ==> pull up
206 * others ==> pull down
207 */
208static const u32 rts5227_ms_pull_ctl_enable_tbl[] = {
209 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
210 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
211 0,
212};
213
214/* MS Pull Control Disable:
215 * MS CD ==> pull up
216 * others ==> pull down
217 */
218static const u32 rts5227_ms_pull_ctl_disable_tbl[] = {
219 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
220 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
221 0,
222};
223
224void rts5227_init_params(struct rtsx_pcr *pcr)
225{
226 pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
227 pcr->num_slots = 2;
228 pcr->ops = &rts5227_pcr_ops;
229
230 pcr->sd_pull_ctl_enable_tbl = rts5227_sd_pull_ctl_enable_tbl;
231 pcr->sd_pull_ctl_disable_tbl = rts5227_sd_pull_ctl_disable_tbl;
232 pcr->ms_pull_ctl_enable_tbl = rts5227_ms_pull_ctl_enable_tbl;
233 pcr->ms_pull_ctl_disable_tbl = rts5227_ms_pull_ctl_disable_tbl;
234}