1 /* Driver for Realtek PCI-Express card reader
2 *
3 * Copyright(c) 2009-2013 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 */
21
22 #include <linux/module.h>
23 #include <linux/delay.h>
24 #include <linux/mfd/rtsx_pci.h>
25
26 #include "rtsx_pcr.h"
27
rts5209_get_ic_version(struct rtsx_pcr * pcr)28 static u8 rts5209_get_ic_version(struct rtsx_pcr *pcr)
29 {
30 u8 val;
31
32 val = rtsx_pci_readb(pcr, 0x1C);
33 return val & 0x0F;
34 }
35
rts5209_fetch_vendor_settings(struct rtsx_pcr * pcr)36 static void rts5209_fetch_vendor_settings(struct rtsx_pcr *pcr)
37 {
38 u32 reg;
39
40 rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, ®);
41 dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
42
43 if (rts5209_vendor_setting1_valid(reg)) {
44 if (rts5209_reg_check_ms_pmos(reg))
45 pcr->flags |= PCR_MS_PMOS;
46 pcr->aspm_en = rts5209_reg_to_aspm(reg);
47 }
48
49 rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, ®);
50 dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
51
52 if (rts5209_vendor_setting2_valid(reg)) {
53 pcr->sd30_drive_sel_1v8 =
54 rts5209_reg_to_sd30_drive_sel_1v8(reg);
55 pcr->sd30_drive_sel_3v3 =
56 rts5209_reg_to_sd30_drive_sel_3v3(reg);
57 pcr->card_drive_sel = rts5209_reg_to_card_drive_sel(reg);
58 }
59 }
60
rts5209_force_power_down(struct rtsx_pcr * pcr,u8 pm_state)61 static void rts5209_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
62 {
63 rtsx_pci_write_register(pcr, FPDCTL, 0x07, 0x07);
64 }
65
rts5209_extra_init_hw(struct rtsx_pcr * pcr)66 static int rts5209_extra_init_hw(struct rtsx_pcr *pcr)
67 {
68 rtsx_pci_init_cmd(pcr);
69
70 /* Turn off LED */
71 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO, 0xFF, 0x03);
72 /* Reset ASPM state to default value */
73 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
74 /* Force CLKREQ# PIN to drive 0 to request clock */
75 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
76 /* Configure GPIO as output */
77 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_GPIO_DIR, 0xFF, 0x03);
78 /* Configure driving */
79 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
80 0xFF, pcr->sd30_drive_sel_3v3);
81
82 return rtsx_pci_send_cmd(pcr, 100);
83 }
84
rts5209_optimize_phy(struct rtsx_pcr * pcr)85 static int rts5209_optimize_phy(struct rtsx_pcr *pcr)
86 {
87 return rtsx_pci_write_phy_register(pcr, 0x00, 0xB966);
88 }
89
rts5209_turn_on_led(struct rtsx_pcr * pcr)90 static int rts5209_turn_on_led(struct rtsx_pcr *pcr)
91 {
92 return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x00);
93 }
94
rts5209_turn_off_led(struct rtsx_pcr * pcr)95 static int rts5209_turn_off_led(struct rtsx_pcr *pcr)
96 {
97 return rtsx_pci_write_register(pcr, CARD_GPIO, 0x01, 0x01);
98 }
99
rts5209_enable_auto_blink(struct rtsx_pcr * pcr)100 static int rts5209_enable_auto_blink(struct rtsx_pcr *pcr)
101 {
102 return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0xFF, 0x0D);
103 }
104
rts5209_disable_auto_blink(struct rtsx_pcr * pcr)105 static int rts5209_disable_auto_blink(struct rtsx_pcr *pcr)
106 {
107 return rtsx_pci_write_register(pcr, CARD_AUTO_BLINK, 0x08, 0x00);
108 }
109
rts5209_card_power_on(struct rtsx_pcr * pcr,int card)110 static int rts5209_card_power_on(struct rtsx_pcr *pcr, int card)
111 {
112 int err;
113 u8 pwr_mask, partial_pwr_on, pwr_on;
114
115 pwr_mask = SD_POWER_MASK;
116 partial_pwr_on = SD_PARTIAL_POWER_ON;
117 pwr_on = SD_POWER_ON;
118
119 if ((pcr->flags & PCR_MS_PMOS) && (card == RTSX_MS_CARD)) {
120 pwr_mask = MS_POWER_MASK;
121 partial_pwr_on = MS_PARTIAL_POWER_ON;
122 pwr_on = MS_POWER_ON;
123 }
124
125 rtsx_pci_init_cmd(pcr);
126 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
127 pwr_mask, partial_pwr_on);
128 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
129 LDO3318_PWR_MASK, 0x04);
130 err = rtsx_pci_send_cmd(pcr, 100);
131 if (err < 0)
132 return err;
133
134 /* To avoid too large in-rush current */
135 udelay(150);
136
137 rtsx_pci_init_cmd(pcr);
138 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL, pwr_mask, pwr_on);
139 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
140 LDO3318_PWR_MASK, 0x00);
141 err = rtsx_pci_send_cmd(pcr, 100);
142 if (err < 0)
143 return err;
144
145 return 0;
146 }
147
rts5209_card_power_off(struct rtsx_pcr * pcr,int card)148 static int rts5209_card_power_off(struct rtsx_pcr *pcr, int card)
149 {
150 u8 pwr_mask, pwr_off;
151
152 pwr_mask = SD_POWER_MASK;
153 pwr_off = SD_POWER_OFF;
154
155 if ((pcr->flags & PCR_MS_PMOS) && (card == RTSX_MS_CARD)) {
156 pwr_mask = MS_POWER_MASK;
157 pwr_off = MS_POWER_OFF;
158 }
159
160 rtsx_pci_init_cmd(pcr);
161 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
162 pwr_mask | PMOS_STRG_MASK, pwr_off | PMOS_STRG_400mA);
163 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
164 LDO3318_PWR_MASK, 0x06);
165 return rtsx_pci_send_cmd(pcr, 100);
166 }
167
rts5209_switch_output_voltage(struct rtsx_pcr * pcr,u8 voltage)168 static int rts5209_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
169 {
170 int err;
171
172 if (voltage == OUTPUT_3V3) {
173 err = rtsx_pci_write_register(pcr,
174 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
175 if (err < 0)
176 return err;
177 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
178 if (err < 0)
179 return err;
180 } else if (voltage == OUTPUT_1V8) {
181 err = rtsx_pci_write_register(pcr,
182 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
183 if (err < 0)
184 return err;
185 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
186 if (err < 0)
187 return err;
188 } else {
189 return -EINVAL;
190 }
191
192 return 0;
193 }
194
195 static const struct pcr_ops rts5209_pcr_ops = {
196 .fetch_vendor_settings = rts5209_fetch_vendor_settings,
197 .extra_init_hw = rts5209_extra_init_hw,
198 .optimize_phy = rts5209_optimize_phy,
199 .turn_on_led = rts5209_turn_on_led,
200 .turn_off_led = rts5209_turn_off_led,
201 .enable_auto_blink = rts5209_enable_auto_blink,
202 .disable_auto_blink = rts5209_disable_auto_blink,
203 .card_power_on = rts5209_card_power_on,
204 .card_power_off = rts5209_card_power_off,
205 .switch_output_voltage = rts5209_switch_output_voltage,
206 .cd_deglitch = NULL,
207 .conv_clk_and_div_n = NULL,
208 .force_power_down = rts5209_force_power_down,
209 };
210
211 /* SD Pull Control Enable:
212 * SD_DAT[3:0] ==> pull up
213 * SD_CD ==> pull up
214 * SD_WP ==> pull up
215 * SD_CMD ==> pull up
216 * SD_CLK ==> pull down
217 */
218 static const u32 rts5209_sd_pull_ctl_enable_tbl[] = {
219 RTSX_REG_PAIR(CARD_PULL_CTL1, 0xAA),
220 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
221 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
222 0,
223 };
224
225 /* SD Pull Control Disable:
226 * SD_DAT[3:0] ==> pull down
227 * SD_CD ==> pull up
228 * SD_WP ==> pull down
229 * SD_CMD ==> pull down
230 * SD_CLK ==> pull down
231 */
232 static const u32 rts5209_sd_pull_ctl_disable_tbl[] = {
233 RTSX_REG_PAIR(CARD_PULL_CTL1, 0x55),
234 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
235 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
236 0,
237 };
238
239 /* MS Pull Control Enable:
240 * MS CD ==> pull up
241 * others ==> pull down
242 */
243 static const u32 rts5209_ms_pull_ctl_enable_tbl[] = {
244 RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
245 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
246 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
247 0,
248 };
249
250 /* MS Pull Control Disable:
251 * MS CD ==> pull up
252 * others ==> pull down
253 */
254 static const u32 rts5209_ms_pull_ctl_disable_tbl[] = {
255 RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
256 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
257 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
258 0,
259 };
260
rts5209_init_params(struct rtsx_pcr * pcr)261 void rts5209_init_params(struct rtsx_pcr *pcr)
262 {
263 pcr->extra_caps = EXTRA_CAPS_SD_SDR50 |
264 EXTRA_CAPS_SD_SDR104 | EXTRA_CAPS_MMC_8BIT;
265 pcr->num_slots = 2;
266 pcr->ops = &rts5209_pcr_ops;
267
268 pcr->flags = 0;
269 pcr->card_drive_sel = RTS5209_CARD_DRIVE_DEFAULT;
270 pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
271 pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
272 pcr->aspm_en = ASPM_L1_EN;
273 pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 16);
274 pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
275
276 pcr->ic_version = rts5209_get_ic_version(pcr);
277 pcr->sd_pull_ctl_enable_tbl = rts5209_sd_pull_ctl_enable_tbl;
278 pcr->sd_pull_ctl_disable_tbl = rts5209_sd_pull_ctl_disable_tbl;
279 pcr->ms_pull_ctl_enable_tbl = rts5209_ms_pull_ctl_enable_tbl;
280 pcr->ms_pull_ctl_disable_tbl = rts5209_ms_pull_ctl_disable_tbl;
281 }
282