Merge branches 'for-5.2/fixes', 'for-5.3/doc', 'for-5.3/ish', 'for-5.3/logitech'...
[linux-2.6-microblaze.git] / drivers / misc / cardreader / rts5229.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Driver for Realtek PCI-Express card reader
3  *
4  * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
5  *
6  * Author:
7  *   Wei WANG <wei_wang@realsil.com.cn>
8  */
9
10 #include <linux/module.h>
11 #include <linux/delay.h>
12 #include <linux/rtsx_pci.h>
13
14 #include "rtsx_pcr.h"
15
16 static u8 rts5229_get_ic_version(struct rtsx_pcr *pcr)
17 {
18         u8 val;
19
20         rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
21         return val & 0x0F;
22 }
23
24 static void rts5229_fetch_vendor_settings(struct rtsx_pcr *pcr)
25 {
26         u32 reg;
27
28         rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
29         pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
30
31         if (!rtsx_vendor_setting_valid(reg))
32                 return;
33
34         pcr->aspm_en = rtsx_reg_to_aspm(reg);
35         pcr->sd30_drive_sel_1v8 =
36                 map_sd_drive(rtsx_reg_to_sd30_drive_sel_1v8(reg));
37         pcr->card_drive_sel &= 0x3F;
38         pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg);
39
40         rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, &reg);
41         pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
42         pcr->sd30_drive_sel_3v3 =
43                 map_sd_drive(rtsx_reg_to_sd30_drive_sel_3v3(reg));
44 }
45
46 static void rts5229_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
47 {
48         rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
49 }
50
51 static int rts5229_extra_init_hw(struct rtsx_pcr *pcr)
52 {
53         rtsx_pci_init_cmd(pcr);
54
55         /* Configure GPIO as output */
56         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
57         /* Reset ASPM state to default value */
58         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
59         /* Force CLKREQ# PIN to drive 0 to request clock */
60         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
61         /* Switch LDO3318 source from DV33 to card_3v3 */
62         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
63         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
64         /* LED shine disabled, set initial shine cycle period */
65         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
66         /* Configure driving */
67         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
68                         0xFF, pcr->sd30_drive_sel_3v3);
69
70         return rtsx_pci_send_cmd(pcr, 100);
71 }
72
73 static int rts5229_optimize_phy(struct rtsx_pcr *pcr)
74 {
75         /* Optimize RX sensitivity */
76         return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
77 }
78
79 static int rts5229_turn_on_led(struct rtsx_pcr *pcr)
80 {
81         return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
82 }
83
84 static int rts5229_turn_off_led(struct rtsx_pcr *pcr)
85 {
86         return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
87 }
88
89 static int rts5229_enable_auto_blink(struct rtsx_pcr *pcr)
90 {
91         return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
92 }
93
94 static int rts5229_disable_auto_blink(struct rtsx_pcr *pcr)
95 {
96         return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
97 }
98
99 static int rts5229_card_power_on(struct rtsx_pcr *pcr, int card)
100 {
101         int err;
102
103         rtsx_pci_init_cmd(pcr);
104         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
105                         SD_POWER_MASK, SD_PARTIAL_POWER_ON);
106         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
107                         LDO3318_PWR_MASK, 0x02);
108         err = rtsx_pci_send_cmd(pcr, 100);
109         if (err < 0)
110                 return err;
111
112         /* To avoid too large in-rush current */
113         udelay(150);
114
115         rtsx_pci_init_cmd(pcr);
116         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
117                         SD_POWER_MASK, SD_POWER_ON);
118         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
119                         LDO3318_PWR_MASK, 0x06);
120         return rtsx_pci_send_cmd(pcr, 100);
121 }
122
123 static int rts5229_card_power_off(struct rtsx_pcr *pcr, int card)
124 {
125         rtsx_pci_init_cmd(pcr);
126         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
127                         SD_POWER_MASK | PMOS_STRG_MASK,
128                         SD_POWER_OFF | PMOS_STRG_400mA);
129         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
130                         LDO3318_PWR_MASK, 0x00);
131         return rtsx_pci_send_cmd(pcr, 100);
132 }
133
134 static int rts5229_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
135 {
136         int err;
137
138         if (voltage == OUTPUT_3V3) {
139                 err = rtsx_pci_write_register(pcr,
140                                 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
141                 if (err < 0)
142                         return err;
143                 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
144                 if (err < 0)
145                         return err;
146         } else if (voltage == OUTPUT_1V8) {
147                 err = rtsx_pci_write_register(pcr,
148                                 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
149                 if (err < 0)
150                         return err;
151                 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
152                 if (err < 0)
153                         return err;
154         } else {
155                 return -EINVAL;
156         }
157
158         return 0;
159 }
160
161 static const struct pcr_ops rts5229_pcr_ops = {
162         .fetch_vendor_settings = rts5229_fetch_vendor_settings,
163         .extra_init_hw = rts5229_extra_init_hw,
164         .optimize_phy = rts5229_optimize_phy,
165         .turn_on_led = rts5229_turn_on_led,
166         .turn_off_led = rts5229_turn_off_led,
167         .enable_auto_blink = rts5229_enable_auto_blink,
168         .disable_auto_blink = rts5229_disable_auto_blink,
169         .card_power_on = rts5229_card_power_on,
170         .card_power_off = rts5229_card_power_off,
171         .switch_output_voltage = rts5229_switch_output_voltage,
172         .cd_deglitch = NULL,
173         .conv_clk_and_div_n = NULL,
174         .force_power_down = rts5229_force_power_down,
175 };
176
177 /* SD Pull Control Enable:
178  *     SD_DAT[3:0] ==> pull up
179  *     SD_CD       ==> pull up
180  *     SD_WP       ==> pull up
181  *     SD_CMD      ==> pull up
182  *     SD_CLK      ==> pull down
183  */
184 static const u32 rts5229_sd_pull_ctl_enable_tbl1[] = {
185         RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
186         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
187         0,
188 };
189
190 /* For RTS5229 version C */
191 static const u32 rts5229_sd_pull_ctl_enable_tbl2[] = {
192         RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
193         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD9),
194         0,
195 };
196
197 /* SD Pull Control Disable:
198  *     SD_DAT[3:0] ==> pull down
199  *     SD_CD       ==> pull up
200  *     SD_WP       ==> pull down
201  *     SD_CMD      ==> pull down
202  *     SD_CLK      ==> pull down
203  */
204 static const u32 rts5229_sd_pull_ctl_disable_tbl1[] = {
205         RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
206         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
207         0,
208 };
209
210 /* For RTS5229 version C */
211 static const u32 rts5229_sd_pull_ctl_disable_tbl2[] = {
212         RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
213         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE5),
214         0,
215 };
216
217 /* MS Pull Control Enable:
218  *     MS CD       ==> pull up
219  *     others      ==> pull down
220  */
221 static const u32 rts5229_ms_pull_ctl_enable_tbl[] = {
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 rts5229_ms_pull_ctl_disable_tbl[] = {
232         RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
233         RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
234         0,
235 };
236
237 void rts5229_init_params(struct rtsx_pcr *pcr)
238 {
239         pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
240         pcr->num_slots = 2;
241         pcr->ops = &rts5229_pcr_ops;
242
243         pcr->flags = 0;
244         pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
245         pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
246         pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
247         pcr->aspm_en = ASPM_L1_EN;
248         pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
249         pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);
250
251         pcr->ic_version = rts5229_get_ic_version(pcr);
252         if (pcr->ic_version == IC_VER_C) {
253                 pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl2;
254                 pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl2;
255         } else {
256                 pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl1;
257                 pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl1;
258         }
259         pcr->ms_pull_ctl_enable_tbl = rts5229_ms_pull_ctl_enable_tbl;
260         pcr->ms_pull_ctl_disable_tbl = rts5229_ms_pull_ctl_disable_tbl;
261 }