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 	struct pci_dev *pdev = pcr->pci;
27 	u32 reg;
28 
29 	pci_read_config_dword(pdev, PCR_SETTING_REG1, &reg);
30 	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
31 
32 	if (!rtsx_vendor_setting_valid(reg))
33 		return;
34 
35 	pcr->aspm_en = rtsx_reg_to_aspm(reg);
36 	pcr->sd30_drive_sel_1v8 =
37 		map_sd_drive(rtsx_reg_to_sd30_drive_sel_1v8(reg));
38 	pcr->card_drive_sel &= 0x3F;
39 	pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg);
40 
41 	pci_read_config_dword(pdev, PCR_SETTING_REG2, &reg);
42 	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
43 	pcr->sd30_drive_sel_3v3 =
44 		map_sd_drive(rtsx_reg_to_sd30_drive_sel_3v3(reg));
45 }
46 
47 static void rts5229_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
48 {
49 	rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
50 }
51 
52 static int rts5229_extra_init_hw(struct rtsx_pcr *pcr)
53 {
54 	rtsx_pci_init_cmd(pcr);
55 
56 	/* Configure GPIO as output */
57 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
58 	/* Reset ASPM state to default value */
59 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
60 	/* Force CLKREQ# PIN to drive 0 to request clock */
61 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
62 	/* Switch LDO3318 source from DV33 to card_3v3 */
63 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
64 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
65 	/* LED shine disabled, set initial shine cycle period */
66 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
67 	/* Configure driving */
68 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
69 			0xFF, pcr->sd30_drive_sel_3v3);
70 
71 	return rtsx_pci_send_cmd(pcr, 100);
72 }
73 
74 static int rts5229_optimize_phy(struct rtsx_pcr *pcr)
75 {
76 	/* Optimize RX sensitivity */
77 	return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
78 }
79 
80 static int rts5229_turn_on_led(struct rtsx_pcr *pcr)
81 {
82 	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
83 }
84 
85 static int rts5229_turn_off_led(struct rtsx_pcr *pcr)
86 {
87 	return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
88 }
89 
90 static int rts5229_enable_auto_blink(struct rtsx_pcr *pcr)
91 {
92 	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
93 }
94 
95 static int rts5229_disable_auto_blink(struct rtsx_pcr *pcr)
96 {
97 	return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
98 }
99 
100 static int rts5229_card_power_on(struct rtsx_pcr *pcr, int card)
101 {
102 	int err;
103 
104 	rtsx_pci_init_cmd(pcr);
105 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
106 			SD_POWER_MASK, SD_PARTIAL_POWER_ON);
107 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
108 			LDO3318_PWR_MASK, 0x02);
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,
118 			SD_POWER_MASK, SD_POWER_ON);
119 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
120 			LDO3318_PWR_MASK, 0x06);
121 	return rtsx_pci_send_cmd(pcr, 100);
122 }
123 
124 static int rts5229_card_power_off(struct rtsx_pcr *pcr, int card)
125 {
126 	rtsx_pci_init_cmd(pcr);
127 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
128 			SD_POWER_MASK | PMOS_STRG_MASK,
129 			SD_POWER_OFF | PMOS_STRG_400mA);
130 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
131 			LDO3318_PWR_MASK, 0x00);
132 	return rtsx_pci_send_cmd(pcr, 100);
133 }
134 
135 static int rts5229_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
136 {
137 	int err;
138 
139 	if (voltage == OUTPUT_3V3) {
140 		err = rtsx_pci_write_register(pcr,
141 				SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
142 		if (err < 0)
143 			return err;
144 		err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
145 		if (err < 0)
146 			return err;
147 	} else if (voltage == OUTPUT_1V8) {
148 		err = rtsx_pci_write_register(pcr,
149 				SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
150 		if (err < 0)
151 			return err;
152 		err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
153 		if (err < 0)
154 			return err;
155 	} else {
156 		return -EINVAL;
157 	}
158 
159 	return 0;
160 }
161 
162 static const struct pcr_ops rts5229_pcr_ops = {
163 	.fetch_vendor_settings = rts5229_fetch_vendor_settings,
164 	.extra_init_hw = rts5229_extra_init_hw,
165 	.optimize_phy = rts5229_optimize_phy,
166 	.turn_on_led = rts5229_turn_on_led,
167 	.turn_off_led = rts5229_turn_off_led,
168 	.enable_auto_blink = rts5229_enable_auto_blink,
169 	.disable_auto_blink = rts5229_disable_auto_blink,
170 	.card_power_on = rts5229_card_power_on,
171 	.card_power_off = rts5229_card_power_off,
172 	.switch_output_voltage = rts5229_switch_output_voltage,
173 	.cd_deglitch = NULL,
174 	.conv_clk_and_div_n = NULL,
175 	.force_power_down = rts5229_force_power_down,
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 rts5229_sd_pull_ctl_enable_tbl1[] = {
186 	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
187 	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
188 	0,
189 };
190 
191 /* For RTS5229 version C */
192 static const u32 rts5229_sd_pull_ctl_enable_tbl2[] = {
193 	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
194 	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD9),
195 	0,
196 };
197 
198 /* SD Pull Control Disable:
199  *     SD_DAT[3:0] ==> pull down
200  *     SD_CD       ==> pull up
201  *     SD_WP       ==> pull down
202  *     SD_CMD      ==> pull down
203  *     SD_CLK      ==> pull down
204  */
205 static const u32 rts5229_sd_pull_ctl_disable_tbl1[] = {
206 	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
207 	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
208 	0,
209 };
210 
211 /* For RTS5229 version C */
212 static const u32 rts5229_sd_pull_ctl_disable_tbl2[] = {
213 	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
214 	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE5),
215 	0,
216 };
217 
218 /* MS Pull Control Enable:
219  *     MS CD       ==> pull up
220  *     others      ==> pull down
221  */
222 static const u32 rts5229_ms_pull_ctl_enable_tbl[] = {
223 	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
224 	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
225 	0,
226 };
227 
228 /* MS Pull Control Disable:
229  *     MS CD       ==> pull up
230  *     others      ==> pull down
231  */
232 static const u32 rts5229_ms_pull_ctl_disable_tbl[] = {
233 	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
234 	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
235 	0,
236 };
237 
238 void rts5229_init_params(struct rtsx_pcr *pcr)
239 {
240 	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
241 	pcr->num_slots = 2;
242 	pcr->ops = &rts5229_pcr_ops;
243 
244 	pcr->flags = 0;
245 	pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
246 	pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
247 	pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
248 	pcr->aspm_en = ASPM_L1_EN;
249 	pcr->aspm_mode = ASPM_MODE_CFG;
250 	pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
251 	pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);
252 
253 	pcr->ic_version = rts5229_get_ic_version(pcr);
254 	if (pcr->ic_version == IC_VER_C) {
255 		pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl2;
256 		pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl2;
257 	} else {
258 		pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl1;
259 		pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl1;
260 	}
261 	pcr->ms_pull_ctl_enable_tbl = rts5229_ms_pull_ctl_enable_tbl;
262 	pcr->ms_pull_ctl_disable_tbl = rts5229_ms_pull_ctl_disable_tbl;
263 }
264