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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/bitops.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/mfd/rtsx_pci.h> | |
27 | ||
28 | #include "rtsx_pcr.h" | |
29 | ||
30 | static u8 rtl8411_get_ic_version(struct rtsx_pcr *pcr) | |
31 | { | |
32 | u8 val; | |
33 | ||
34 | rtsx_pci_read_register(pcr, SYS_VER, &val); | |
35 | return val & 0x0F; | |
36 | } | |
37 | ||
38 | static int rtl8411_extra_init_hw(struct rtsx_pcr *pcr) | |
39 | { | |
40 | return rtsx_pci_write_register(pcr, CD_PAD_CTL, | |
41 | CD_DISABLE_MASK | CD_AUTO_DISABLE, CD_ENABLE); | |
42 | } | |
43 | ||
44 | static int rtl8411_turn_on_led(struct rtsx_pcr *pcr) | |
45 | { | |
46 | return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00); | |
47 | } | |
48 | ||
49 | static int rtl8411_turn_off_led(struct rtsx_pcr *pcr) | |
50 | { | |
51 | return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01); | |
52 | } | |
53 | ||
54 | static int rtl8411_enable_auto_blink(struct rtsx_pcr *pcr) | |
55 | { | |
56 | return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D); | |
57 | } | |
58 | ||
59 | static int rtl8411_disable_auto_blink(struct rtsx_pcr *pcr) | |
60 | { | |
61 | return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00); | |
62 | } | |
63 | ||
64 | static int rtl8411_card_power_on(struct rtsx_pcr *pcr, int card) | |
65 | { | |
66 | int err; | |
67 | ||
68 | rtsx_pci_init_cmd(pcr); | |
69 | rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, | |
70 | BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON); | |
71 | rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_CTL, | |
72 | BPP_LDO_POWB, BPP_LDO_SUSPEND); | |
73 | err = rtsx_pci_send_cmd(pcr, 100); | |
74 | if (err < 0) | |
75 | return err; | |
76 | ||
77 | /* To avoid too large in-rush current */ | |
78 | udelay(150); | |
79 | ||
80 | err = rtsx_pci_write_register(pcr, CARD_PWR_CTL, | |
81 | BPP_POWER_MASK, BPP_POWER_10_PERCENT_ON); | |
82 | if (err < 0) | |
83 | return err; | |
84 | ||
85 | udelay(150); | |
86 | ||
87 | err = rtsx_pci_write_register(pcr, CARD_PWR_CTL, | |
88 | BPP_POWER_MASK, BPP_POWER_15_PERCENT_ON); | |
89 | if (err < 0) | |
90 | return err; | |
91 | ||
92 | udelay(150); | |
93 | ||
94 | err = rtsx_pci_write_register(pcr, CARD_PWR_CTL, | |
95 | BPP_POWER_MASK, BPP_POWER_ON); | |
96 | if (err < 0) | |
97 | return err; | |
98 | ||
99 | return rtsx_pci_write_register(pcr, LDO_CTL, BPP_LDO_POWB, BPP_LDO_ON); | |
100 | } | |
101 | ||
102 | static int rtl8411_card_power_off(struct rtsx_pcr *pcr, int card) | |
103 | { | |
104 | int err; | |
105 | ||
106 | err = rtsx_pci_write_register(pcr, CARD_PWR_CTL, | |
107 | BPP_POWER_MASK, BPP_POWER_OFF); | |
108 | if (err < 0) | |
109 | return err; | |
110 | ||
111 | return rtsx_pci_write_register(pcr, LDO_CTL, | |
112 | BPP_LDO_POWB, BPP_LDO_SUSPEND); | |
113 | } | |
114 | ||
115 | static unsigned int rtl8411_cd_deglitch(struct rtsx_pcr *pcr) | |
116 | { | |
117 | unsigned int card_exist; | |
118 | ||
119 | card_exist = rtsx_pci_readl(pcr, RTSX_BIPR); | |
120 | card_exist &= CARD_EXIST; | |
121 | if (!card_exist) { | |
122 | /* Enable card CD */ | |
123 | rtsx_pci_write_register(pcr, CD_PAD_CTL, | |
124 | CD_DISABLE_MASK, CD_ENABLE); | |
125 | /* Enable card interrupt */ | |
126 | rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x00); | |
127 | return 0; | |
128 | } | |
129 | ||
130 | if (hweight32(card_exist) > 1) { | |
131 | rtsx_pci_write_register(pcr, CARD_PWR_CTL, | |
132 | BPP_POWER_MASK, BPP_POWER_5_PERCENT_ON); | |
133 | msleep(100); | |
134 | ||
135 | card_exist = rtsx_pci_readl(pcr, RTSX_BIPR); | |
136 | if (card_exist & MS_EXIST) | |
137 | card_exist = MS_EXIST; | |
138 | else if (card_exist & SD_EXIST) | |
139 | card_exist = SD_EXIST; | |
140 | else | |
141 | card_exist = 0; | |
142 | ||
143 | rtsx_pci_write_register(pcr, CARD_PWR_CTL, | |
144 | BPP_POWER_MASK, BPP_POWER_OFF); | |
145 | ||
146 | dev_dbg(&(pcr->pci->dev), | |
147 | "After CD deglitch, card_exist = 0x%x\n", | |
148 | card_exist); | |
149 | } | |
150 | ||
151 | if (card_exist & MS_EXIST) { | |
152 | /* Disable SD interrupt */ | |
153 | rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x40); | |
154 | rtsx_pci_write_register(pcr, CD_PAD_CTL, | |
155 | CD_DISABLE_MASK, MS_CD_EN_ONLY); | |
156 | } else if (card_exist & SD_EXIST) { | |
157 | /* Disable MS interrupt */ | |
158 | rtsx_pci_write_register(pcr, EFUSE_CONTENT, 0xe0, 0x80); | |
159 | rtsx_pci_write_register(pcr, CD_PAD_CTL, | |
160 | CD_DISABLE_MASK, SD_CD_EN_ONLY); | |
161 | } | |
162 | ||
163 | return card_exist; | |
164 | } | |
165 | ||
166 | static const struct pcr_ops rtl8411_pcr_ops = { | |
167 | .extra_init_hw = rtl8411_extra_init_hw, | |
168 | .optimize_phy = NULL, | |
169 | .turn_on_led = rtl8411_turn_on_led, | |
170 | .turn_off_led = rtl8411_turn_off_led, | |
171 | .enable_auto_blink = rtl8411_enable_auto_blink, | |
172 | .disable_auto_blink = rtl8411_disable_auto_blink, | |
173 | .card_power_on = rtl8411_card_power_on, | |
174 | .card_power_off = rtl8411_card_power_off, | |
175 | .cd_deglitch = rtl8411_cd_deglitch, | |
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 rtl8411_sd_pull_ctl_enable_tbl[] = { | |
186 | RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA), | |
187 | RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA), | |
188 | RTSX_REG_PAIR(CARD_PULL_CTL3, 0xA9), | |
189 | RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09), | |
190 | RTSX_REG_PAIR(CARD_PULL_CTL5, 0x09), | |
191 | RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04), | |
192 | 0, | |
193 | }; | |
194 | ||
195 | /* SD Pull Control Disable: | |
196 | * SD_DAT[3:0] ==> pull down | |
197 | * SD_CD ==> pull up | |
198 | * SD_WP ==> pull down | |
199 | * SD_CMD ==> pull down | |
200 | * SD_CLK ==> pull down | |
201 | */ | |
202 | static const u32 rtl8411_sd_pull_ctl_disable_tbl[] = { | |
203 | RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65), | |
204 | RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55), | |
205 | RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95), | |
206 | RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09), | |
207 | RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05), | |
208 | RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04), | |
209 | 0, | |
210 | }; | |
211 | ||
212 | /* MS Pull Control Enable: | |
213 | * MS CD ==> pull up | |
214 | * others ==> pull down | |
215 | */ | |
216 | static const u32 rtl8411_ms_pull_ctl_enable_tbl[] = { | |
217 | RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65), | |
218 | RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55), | |
219 | RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95), | |
220 | RTSX_REG_PAIR(CARD_PULL_CTL4, 0x05), | |
221 | RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05), | |
222 | RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04), | |
223 | 0, | |
224 | }; | |
225 | ||
226 | /* MS Pull Control Disable: | |
227 | * MS CD ==> pull up | |
228 | * others ==> pull down | |
229 | */ | |
230 | static const u32 rtl8411_ms_pull_ctl_disable_tbl[] = { | |
231 | RTSX_REG_PAIR(CARD_PULL_CTL1, 0x65), | |
232 | RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55), | |
233 | RTSX_REG_PAIR(CARD_PULL_CTL3, 0x95), | |
234 | RTSX_REG_PAIR(CARD_PULL_CTL4, 0x09), | |
235 | RTSX_REG_PAIR(CARD_PULL_CTL5, 0x05), | |
236 | RTSX_REG_PAIR(CARD_PULL_CTL6, 0x04), | |
237 | 0, | |
238 | }; | |
239 | ||
240 | void rtl8411_init_params(struct rtsx_pcr *pcr) | |
241 | { | |
242 | pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104; | |
243 | pcr->num_slots = 2; | |
244 | pcr->ops = &rtl8411_pcr_ops; | |
245 | ||
246 | pcr->ic_version = rtl8411_get_ic_version(pcr); | |
247 | pcr->sd_pull_ctl_enable_tbl = rtl8411_sd_pull_ctl_enable_tbl; | |
248 | pcr->sd_pull_ctl_disable_tbl = rtl8411_sd_pull_ctl_disable_tbl; | |
249 | pcr->ms_pull_ctl_enable_tbl = rtl8411_ms_pull_ctl_enable_tbl; | |
250 | pcr->ms_pull_ctl_disable_tbl = rtl8411_ms_pull_ctl_disable_tbl; | |
251 | } |