tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
28static u8 rts5249_get_ic_version(struct rtsx_pcr *pcr)
29{
30 u8 val;
31
32 rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
33 return val & 0x0F;
34}
35
36static void rts5249_fill_driving(struct rtsx_pcr *pcr, u8 voltage)
37{
38 u8 driving_3v3[4][3] = {
39 {0x11, 0x11, 0x11},
40 {0x55, 0x55, 0x5C},
41 {0x99, 0x99, 0x92},
42 {0x99, 0x99, 0x92},
43 };
44 u8 driving_1v8[4][3] = {
45 {0x3C, 0x3C, 0x3C},
46 {0xB3, 0xB3, 0xB3},
47 {0xFE, 0xFE, 0xFE},
48 {0xC4, 0xC4, 0xC4},
49 };
50 u8 (*driving)[3], drive_sel;
51
52 if (voltage == OUTPUT_3V3) {
53 driving = driving_3v3;
54 drive_sel = pcr->sd30_drive_sel_3v3;
55 } else {
56 driving = driving_1v8;
57 drive_sel = pcr->sd30_drive_sel_1v8;
58 }
59
60 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CLK_DRIVE_SEL,
61 0xFF, driving[drive_sel][0]);
62 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_CMD_DRIVE_SEL,
63 0xFF, driving[drive_sel][1]);
64 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DAT_DRIVE_SEL,
65 0xFF, driving[drive_sel][2]);
66}
67
68static void rts5249_fetch_vendor_settings(struct rtsx_pcr *pcr)
69{
70 u32 reg;
71
72 rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, ®);
73 dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
74
75 if (!rtsx_vendor_setting_valid(reg))
76 return;
77
78 pcr->aspm_en = rtsx_reg_to_aspm(reg);
79 pcr->sd30_drive_sel_1v8 = rtsx_reg_to_sd30_drive_sel_1v8(reg);
80 pcr->card_drive_sel &= 0x3F;
81 pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg);
82
83 rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, ®);
84 dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
85 pcr->sd30_drive_sel_3v3 = rtsx_reg_to_sd30_drive_sel_3v3(reg);
86 if (rtsx_reg_check_reverse_socket(reg))
87 pcr->flags |= PCR_REVERSE_SOCKET;
88}
89
90static void rts5249_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
91{
92 /* Set relink_time to 0 */
93 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, 0xFF, 0);
94 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, 0xFF, 0);
95 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3, 0x01, 0);
96
97 if (pm_state == HOST_ENTER_S3)
98 rtsx_pci_write_register(pcr, PM_CTRL3, 0x10, 0x10);
99
100 rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
101}
102
103static int rts5249_extra_init_hw(struct rtsx_pcr *pcr)
104{
105 rtsx_pci_init_cmd(pcr);
106
107 /* Configure GPIO as output */
108 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
109 /* Reset ASPM state to default value */
110 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
111 /* Switch LDO3318 source from DV33 to card_3v3 */
112 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
113 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
114 /* LED shine disabled, set initial shine cycle period */
115 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
116 /* Configure driving */
117 rts5249_fill_driving(pcr, OUTPUT_3V3);
118 if (pcr->flags & PCR_REVERSE_SOCKET)
119 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
120 AUTOLOAD_CFG_BASE + 3, 0xB0, 0xB0);
121 else
122 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
123 AUTOLOAD_CFG_BASE + 3, 0xB0, 0x80);
124 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PM_CTRL3, 0x10, 0x00);
125
126 return rtsx_pci_send_cmd(pcr, 100);
127}
128
129static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
130{
131 int err;
132
133 err = rtsx_pci_write_phy_register(pcr, PHY_REG_REV,
134 PHY_REG_REV_RESV | PHY_REG_REV_RXIDLE_LATCHED |
135 PHY_REG_REV_P1_EN | PHY_REG_REV_RXIDLE_EN |
136 PHY_REG_REV_RX_PWST | PHY_REG_REV_CLKREQ_DLY_TIMER_1_0 |
137 PHY_REG_REV_STOP_CLKRD | PHY_REG_REV_STOP_CLKWR);
138 if (err < 0)
139 return err;
140
141 msleep(1);
142
143 err = rtsx_pci_write_phy_register(pcr, PHY_BPCR,
144 PHY_BPCR_IBRXSEL | PHY_BPCR_IBTXSEL |
145 PHY_BPCR_IB_FILTER | PHY_BPCR_CMIRROR_EN);
146 if (err < 0)
147 return err;
148 err = rtsx_pci_write_phy_register(pcr, PHY_PCR,
149 PHY_PCR_FORCE_CODE | PHY_PCR_OOBS_CALI_50 |
150 PHY_PCR_OOBS_VCM_08 | PHY_PCR_OOBS_SEN_90 |
151 PHY_PCR_RSSI_EN);
152 if (err < 0)
153 return err;
154 err = rtsx_pci_write_phy_register(pcr, PHY_RCR2,
155 PHY_RCR2_EMPHASE_EN | PHY_RCR2_NADJR |
156 PHY_RCR2_CDR_CP_10 | PHY_RCR2_CDR_SR_2 |
157 PHY_RCR2_FREQSEL_12 | PHY_RCR2_CPADJEN |
158 PHY_RCR2_CDR_SC_8 | PHY_RCR2_CALIB_LATE);
159 if (err < 0)
160 return err;
161 err = rtsx_pci_write_phy_register(pcr, PHY_FLD4,
162 PHY_FLD4_FLDEN_SEL | PHY_FLD4_REQ_REF |
163 PHY_FLD4_RXAMP_OFF | PHY_FLD4_REQ_ADDA |
164 PHY_FLD4_BER_COUNT | PHY_FLD4_BER_TIMER |
165 PHY_FLD4_BER_CHK_EN);
166 if (err < 0)
167 return err;
168 err = rtsx_pci_write_phy_register(pcr, PHY_RDR, PHY_RDR_RXDSEL_1_9);
169 if (err < 0)
170 return err;
171 err = rtsx_pci_write_phy_register(pcr, PHY_RCR1,
172 PHY_RCR1_ADP_TIME | PHY_RCR1_VCO_COARSE);
173 if (err < 0)
174 return err;
175 err = rtsx_pci_write_phy_register(pcr, PHY_FLD3,
176 PHY_FLD3_TIMER_4 | PHY_FLD3_TIMER_6 |
177 PHY_FLD3_RXDELINK);
178 if (err < 0)
179 return err;
180 return rtsx_pci_write_phy_register(pcr, PHY_TUNE,
181 PHY_TUNE_TUNEREF_1_0 | PHY_TUNE_VBGSEL_1252 |
182 PHY_TUNE_SDBUS_33 | PHY_TUNE_TUNED18 |
183 PHY_TUNE_TUNED12);
184}
185
186static int rts5249_turn_on_led(struct rtsx_pcr *pcr)
187{
188 return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
189}
190
191static int rts5249_turn_off_led(struct rtsx_pcr *pcr)
192{
193 return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
194}
195
196static int rts5249_enable_auto_blink(struct rtsx_pcr *pcr)
197{
198 return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
199}
200
201static int rts5249_disable_auto_blink(struct rtsx_pcr *pcr)
202{
203 return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
204}
205
206static int rts5249_card_power_on(struct rtsx_pcr *pcr, int card)
207{
208 int err;
209
210 rtsx_pci_init_cmd(pcr);
211 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
212 SD_POWER_MASK, SD_VCC_PARTIAL_POWER_ON);
213 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
214 LDO3318_PWR_MASK, 0x02);
215 err = rtsx_pci_send_cmd(pcr, 100);
216 if (err < 0)
217 return err;
218
219 msleep(5);
220
221 rtsx_pci_init_cmd(pcr);
222 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
223 SD_POWER_MASK, SD_VCC_POWER_ON);
224 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
225 LDO3318_PWR_MASK, 0x06);
226 err = rtsx_pci_send_cmd(pcr, 100);
227 if (err < 0)
228 return err;
229
230 return 0;
231}
232
233static int rts5249_card_power_off(struct rtsx_pcr *pcr, int card)
234{
235 rtsx_pci_init_cmd(pcr);
236 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
237 SD_POWER_MASK, SD_POWER_OFF);
238 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
239 LDO3318_PWR_MASK, 0x00);
240 return rtsx_pci_send_cmd(pcr, 100);
241}
242
243static int rts5249_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
244{
245 int err;
246
247 if (voltage == OUTPUT_3V3) {
248 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4FC0 | 0x24);
249 if (err < 0)
250 return err;
251 } else if (voltage == OUTPUT_1V8) {
252 err = rtsx_pci_write_phy_register(pcr, PHY_BACR, 0x3C02);
253 if (err < 0)
254 return err;
255 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4C40 | 0x24);
256 if (err < 0)
257 return err;
258 } else {
259 return -EINVAL;
260 }
261
262 /* set pad drive */
263 rtsx_pci_init_cmd(pcr);
264 rts5249_fill_driving(pcr, voltage);
265 return rtsx_pci_send_cmd(pcr, 100);
266}
267
268static const struct pcr_ops rts5249_pcr_ops = {
269 .fetch_vendor_settings = rts5249_fetch_vendor_settings,
270 .extra_init_hw = rts5249_extra_init_hw,
271 .optimize_phy = rts5249_optimize_phy,
272 .turn_on_led = rts5249_turn_on_led,
273 .turn_off_led = rts5249_turn_off_led,
274 .enable_auto_blink = rts5249_enable_auto_blink,
275 .disable_auto_blink = rts5249_disable_auto_blink,
276 .card_power_on = rts5249_card_power_on,
277 .card_power_off = rts5249_card_power_off,
278 .switch_output_voltage = rts5249_switch_output_voltage,
279 .force_power_down = rts5249_force_power_down,
280};
281
282/* SD Pull Control Enable:
283 * SD_DAT[3:0] ==> pull up
284 * SD_CD ==> pull up
285 * SD_WP ==> pull up
286 * SD_CMD ==> pull up
287 * SD_CLK ==> pull down
288 */
289static const u32 rts5249_sd_pull_ctl_enable_tbl[] = {
290 RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
291 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
292 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
293 RTSX_REG_PAIR(CARD_PULL_CTL4, 0xAA),
294 0,
295};
296
297/* SD Pull Control Disable:
298 * SD_DAT[3:0] ==> pull down
299 * SD_CD ==> pull up
300 * SD_WP ==> pull down
301 * SD_CMD ==> pull down
302 * SD_CLK ==> pull down
303 */
304static const u32 rts5249_sd_pull_ctl_disable_tbl[] = {
305 RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
306 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
307 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
308 RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
309 0,
310};
311
312/* MS Pull Control Enable:
313 * MS CD ==> pull up
314 * others ==> pull down
315 */
316static const u32 rts5249_ms_pull_ctl_enable_tbl[] = {
317 RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
318 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
319 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
320 0,
321};
322
323/* MS Pull Control Disable:
324 * MS CD ==> pull up
325 * others ==> pull down
326 */
327static const u32 rts5249_ms_pull_ctl_disable_tbl[] = {
328 RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
329 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
330 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
331 0,
332};
333
334void rts5249_init_params(struct rtsx_pcr *pcr)
335{
336 pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
337 pcr->num_slots = 2;
338 pcr->ops = &rts5249_pcr_ops;
339
340 pcr->flags = 0;
341 pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
342 pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_C;
343 pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
344 pcr->aspm_en = ASPM_L1_EN;
345 pcr->tx_initial_phase = SET_CLOCK_PHASE(1, 29, 16);
346 pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
347
348 pcr->ic_version = rts5249_get_ic_version(pcr);
349 pcr->sd_pull_ctl_enable_tbl = rts5249_sd_pull_ctl_enable_tbl;
350 pcr->sd_pull_ctl_disable_tbl = rts5249_sd_pull_ctl_disable_tbl;
351 pcr->ms_pull_ctl_enable_tbl = rts5249_ms_pull_ctl_enable_tbl;
352 pcr->ms_pull_ctl_disable_tbl = rts5249_ms_pull_ctl_disable_tbl;
353}