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67d16a46 WW |
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 | ||
29 | static 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 | ||
37 | static 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 | ||
52 | static 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 | ||
64 | static int rts5209_optimize_phy(struct rtsx_pcr *pcr) | |
65 | { | |
66 | return rtsx_pci_write_phy_register(pcr, 0x00, 0xB966); | |
67 | } | |
68 | ||
69 | static int rts5209_turn_on_led(struct rtsx_pcr *pcr) | |
70 | { | |
71 | return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00); | |
72 | } | |
73 | ||
74 | static int rts5209_turn_off_led(struct rtsx_pcr *pcr) | |
75 | { | |
76 | return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01); | |
77 | } | |
78 | ||
79 | static int rts5209_enable_auto_blink(struct rtsx_pcr *pcr) | |
80 | { | |
81 | return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D); | |
82 | } | |
83 | ||
84 | static int rts5209_disable_auto_blink(struct rtsx_pcr *pcr) | |
85 | { | |
86 | return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00); | |
87 | } | |
88 | ||
89 | static 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 | ||
127 | static 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 | ||
d817ac4e WW |
147 | static int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage) |
148 | { | |
149 | int err; | |
150 | ||
151 | if (voltage == OUTPUT_3V3) { | |
88a7ee37 RT |
152 | err = rtsx_pci_write_register(pcr, |
153 | SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_D); | |
154 | if (err < 0) | |
155 | return err; | |
d817ac4e WW |
156 | err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24); |
157 | if (err < 0) | |
158 | return err; | |
159 | } else if (voltage == OUTPUT_1V8) { | |
88a7ee37 RT |
160 | err = rtsx_pci_write_register(pcr, |
161 | SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_B); | |
162 | if (err < 0) | |
163 | return err; | |
d817ac4e WW |
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 | ||
67d16a46 WW |
174 | static 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, | |
d817ac4e | 183 | .switch_output_voltage = rts5209_switch_output_voltage, |
67d16a46 | 184 | .cd_deglitch = NULL, |
ab4e8f8b | 185 | .conv_clk_and_div_n = NULL, |
67d16a46 WW |
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 | */ | |
195 | static 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 | */ | |
209 | static 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 | */ | |
220 | static 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 | */ | |
231 | static 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 | ||
238 | void 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 | } |