1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Driver for Realtek PCI-Express card reader
3 *
4 * Copyright(c) 2018-2019 Realtek Semiconductor Corp. All rights reserved.
5 *
6 * Author:
7 * Rui FENG <rui_feng@realsil.com.cn>
8 * Wei WANG <wei_wang@realsil.com.cn>
9 */
10
11#include <linux/module.h>
12#include <linux/delay.h>
13#include <linux/rtsx_pci.h>
14
15#include "rts5261.h"
16#include "rtsx_pcr.h"
17
18static u8 rts5261_get_ic_version(struct rtsx_pcr *pcr)
19{
20 u8 val;
21
22 rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, data: &val);
23 return val & IC_VERSION_MASK;
24}
25
26static void rts5261_fill_driving(struct rtsx_pcr *pcr, u8 voltage)
27{
28 u8 driving_3v3[4][3] = {
29 {0x96, 0x96, 0x96},
30 {0x96, 0x96, 0x96},
31 {0x7F, 0x7F, 0x7F},
32 {0x13, 0x13, 0x13},
33 };
34 u8 driving_1v8[4][3] = {
35 {0xB3, 0xB3, 0xB3},
36 {0x3A, 0x3A, 0x3A},
37 {0xE6, 0xE6, 0xE6},
38 {0x99, 0x99, 0x99},
39 };
40 u8 (*driving)[3], drive_sel;
41
42 if (voltage == OUTPUT_3V3) {
43 driving = driving_3v3;
44 drive_sel = pcr->sd30_drive_sel_3v3;
45 } else {
46 driving = driving_1v8;
47 drive_sel = pcr->sd30_drive_sel_1v8;
48 }
49
50 rtsx_pci_write_register(pcr, SD30_CLK_DRIVE_SEL,
51 mask: 0xFF, data: driving[drive_sel][0]);
52
53 rtsx_pci_write_register(pcr, SD30_CMD_DRIVE_SEL,
54 mask: 0xFF, data: driving[drive_sel][1]);
55
56 rtsx_pci_write_register(pcr, SD30_DAT_DRIVE_SEL,
57 mask: 0xFF, data: driving[drive_sel][2]);
58}
59
60static void rts5261_force_power_down(struct rtsx_pcr *pcr, u8 pm_state, bool runtime)
61{
62 /* Set relink_time to 0 */
63 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, MASK_8_BIT_DEF, data: 0);
64 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, MASK_8_BIT_DEF, data: 0);
65 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3,
66 RELINK_TIME_MASK, data: 0);
67
68 if (pm_state == HOST_ENTER_S3)
69 rtsx_pci_write_register(pcr, addr: pcr->reg_pm_ctrl3,
70 D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
71
72 if (!runtime) {
73 rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG1,
74 CD_RESUME_EN_MASK, data: 0);
75 rtsx_pci_write_register(pcr, addr: pcr->reg_pm_ctrl3, mask: 0x01, data: 0x00);
76 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
77 FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
78
79 } else {
80 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
81 FORCE_PM_CONTROL | FORCE_PM_VALUE, data: 0);
82
83 rtsx_pci_write_register(pcr, RTS5261_FW_CTL,
84 RTS5261_INFORM_RTD3_COLD, RTS5261_INFORM_RTD3_COLD);
85 rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
86 RTS5261_FORCE_PRSNT_LOW, RTS5261_FORCE_PRSNT_LOW);
87
88 }
89
90 rtsx_pci_write_register(pcr, RTS5261_REG_FPDCTL,
91 SSC_POWER_DOWN, SSC_POWER_DOWN);
92}
93
94static int rts5261_enable_auto_blink(struct rtsx_pcr *pcr)
95{
96 return rtsx_pci_write_register(pcr, OLT_LED_CTL,
97 LED_SHINE_MASK, LED_SHINE_EN);
98}
99
100static int rts5261_disable_auto_blink(struct rtsx_pcr *pcr)
101{
102 return rtsx_pci_write_register(pcr, OLT_LED_CTL,
103 LED_SHINE_MASK, LED_SHINE_DISABLE);
104}
105
106static int rts5261_turn_on_led(struct rtsx_pcr *pcr)
107{
108 return rtsx_pci_write_register(pcr, GPIO_CTL,
109 mask: 0x02, data: 0x02);
110}
111
112static int rts5261_turn_off_led(struct rtsx_pcr *pcr)
113{
114 return rtsx_pci_write_register(pcr, GPIO_CTL,
115 mask: 0x02, data: 0x00);
116}
117
118/* SD Pull Control Enable:
119 * SD_DAT[3:0] ==> pull up
120 * SD_CD ==> pull up
121 * SD_WP ==> pull up
122 * SD_CMD ==> pull up
123 * SD_CLK ==> pull down
124 */
125static const u32 rts5261_sd_pull_ctl_enable_tbl[] = {
126 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
127 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
128 0,
129};
130
131/* SD Pull Control Disable:
132 * SD_DAT[3:0] ==> pull down
133 * SD_CD ==> pull up
134 * SD_WP ==> pull down
135 * SD_CMD ==> pull down
136 * SD_CLK ==> pull down
137 */
138static const u32 rts5261_sd_pull_ctl_disable_tbl[] = {
139 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
140 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
141 0,
142};
143
144static int rts5261_sd_set_sample_push_timing_sd30(struct rtsx_pcr *pcr)
145{
146 rtsx_pci_write_register(pcr, SD_CFG1, SD_MODE_SELECT_MASK
147 | SD_ASYNC_FIFO_NOT_RST, SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
148 rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, CLK_LOW_FREQ);
149 rtsx_pci_write_register(pcr, CARD_CLK_SOURCE, mask: 0xFF,
150 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
151 rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, data: 0);
152
153 return 0;
154}
155
156static int rts5261_card_power_on(struct rtsx_pcr *pcr, int card)
157{
158 struct rtsx_cr_option *option = &pcr->option;
159
160 if (option->ocp_en)
161 rtsx_pci_enable_ocp(pcr);
162
163 rtsx_pci_write_register(pcr, REG_CRC_DUMMY_0,
164 CFG_SD_POW_AUTO_PD, CFG_SD_POW_AUTO_PD);
165
166 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG1,
167 RTS5261_LDO1_TUNE_MASK, RTS5261_LDO1_33);
168 rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
169 RTS5261_LDO1_POWERON, RTS5261_LDO1_POWERON);
170
171 rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
172 RTS5261_LDO3318_POWERON, RTS5261_LDO3318_POWERON);
173
174 msleep(msecs: 20);
175
176 rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
177
178 /* Initialize SD_CFG1 register */
179 rtsx_pci_write_register(pcr, SD_CFG1, mask: 0xFF,
180 SD_CLK_DIVIDE_128 | SD_20_MODE | SD_BUS_WIDTH_1BIT);
181
182 rtsx_pci_write_register(pcr, SD_SAMPLE_POINT_CTL,
183 mask: 0xFF, SD20_RX_POS_EDGE);
184 rtsx_pci_write_register(pcr, SD_PUSH_POINT_CTL, mask: 0xFF, data: 0);
185 rtsx_pci_write_register(pcr, CARD_STOP, SD_STOP | SD_CLR_ERR,
186 SD_STOP | SD_CLR_ERR);
187
188 /* Reset SD_CFG3 register */
189 rtsx_pci_write_register(pcr, SD_CFG3, SD30_CLK_END_EN, data: 0);
190 rtsx_pci_write_register(pcr, REG_SD_STOP_SDCLK_CFG,
191 SD30_CLK_STOP_CFG_EN | SD30_CLK_STOP_CFG1 |
192 SD30_CLK_STOP_CFG0, data: 0);
193
194 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50 ||
195 pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
196 rts5261_sd_set_sample_push_timing_sd30(pcr);
197
198 return 0;
199}
200
201static int rts5261_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
202{
203 int err;
204 u16 val = 0;
205
206 rtsx_pci_write_register(pcr, RTS5261_CARD_PWR_CTL,
207 RTS5261_PUPDC, RTS5261_PUPDC);
208
209 switch (voltage) {
210 case OUTPUT_3V3:
211 rtsx_pci_read_phy_register(pcr, PHY_TUNE, val: &val);
212 val |= PHY_TUNE_SDBUS_33;
213 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, val);
214 if (err < 0)
215 return err;
216
217 rtsx_pci_write_register(pcr, RTS5261_DV3318_CFG,
218 RTS5261_DV3318_TUNE_MASK, RTS5261_DV3318_33);
219 rtsx_pci_write_register(pcr, SD_PAD_CTL,
220 SD_IO_USING_1V8, data: 0);
221 break;
222 case OUTPUT_1V8:
223 rtsx_pci_read_phy_register(pcr, PHY_TUNE, val: &val);
224 val &= ~PHY_TUNE_SDBUS_33;
225 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, val);
226 if (err < 0)
227 return err;
228
229 rtsx_pci_write_register(pcr, RTS5261_DV3318_CFG,
230 RTS5261_DV3318_TUNE_MASK, RTS5261_DV3318_18);
231 rtsx_pci_write_register(pcr, SD_PAD_CTL,
232 SD_IO_USING_1V8, SD_IO_USING_1V8);
233 break;
234 default:
235 return -EINVAL;
236 }
237
238 /* set pad drive */
239 rts5261_fill_driving(pcr, voltage);
240
241 return 0;
242}
243
244static void rts5261_stop_cmd(struct rtsx_pcr *pcr)
245{
246 rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
247 rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
248 rtsx_pci_write_register(pcr, RTS5260_DMA_RST_CTL_0,
249 RTS5260_DMA_RST | RTS5260_ADMA3_RST,
250 RTS5260_DMA_RST | RTS5260_ADMA3_RST);
251 rtsx_pci_write_register(pcr, RBCTL, RB_FLUSH, RB_FLUSH);
252}
253
254static void rts5261_card_before_power_off(struct rtsx_pcr *pcr)
255{
256 rts5261_stop_cmd(pcr);
257 rts5261_switch_output_voltage(pcr, OUTPUT_3V3);
258
259}
260
261static void rts5261_enable_ocp(struct rtsx_pcr *pcr)
262{
263 u8 val = 0;
264
265 val = SD_OCP_INT_EN | SD_DETECT_EN;
266 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
267 RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN,
268 RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN);
269 rtsx_pci_write_register(pcr, REG_OCPCTL, mask: 0xFF, data: val);
270
271}
272
273static void rts5261_disable_ocp(struct rtsx_pcr *pcr)
274{
275 u8 mask = 0;
276
277 mask = SD_OCP_INT_EN | SD_DETECT_EN;
278 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, data: 0);
279 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
280 RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN, data: 0);
281
282}
283
284static int rts5261_card_power_off(struct rtsx_pcr *pcr, int card)
285{
286 int err = 0;
287
288 rts5261_card_before_power_off(pcr);
289 err = rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
290 RTS5261_LDO_POWERON_MASK, data: 0);
291
292 rtsx_pci_write_register(pcr, REG_CRC_DUMMY_0,
293 CFG_SD_POW_AUTO_PD, data: 0);
294 if (pcr->option.ocp_en)
295 rtsx_pci_disable_ocp(pcr);
296
297 return err;
298}
299
300static void rts5261_init_ocp(struct rtsx_pcr *pcr)
301{
302 struct rtsx_cr_option *option = &pcr->option;
303
304 if (option->ocp_en) {
305 u8 mask, val;
306
307 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
308 RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN,
309 RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN);
310
311 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
312 RTS5261_LDO1_OCP_THD_MASK, data: option->sd_800mA_ocp_thd);
313
314 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
315 RTS5261_LDO1_OCP_LMT_THD_MASK,
316 RTS5261_LDO1_LMT_THD_2000);
317
318 mask = SD_OCP_GLITCH_MASK;
319 val = pcr->hw_param.ocp_glitch;
320 rtsx_pci_write_register(pcr, REG_OCPGLITCH, mask, data: val);
321
322 rts5261_enable_ocp(pcr);
323 } else {
324 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
325 RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN, data: 0);
326 }
327}
328
329static void rts5261_clear_ocpstat(struct rtsx_pcr *pcr)
330{
331 u8 mask = 0;
332 u8 val = 0;
333
334 mask = SD_OCP_INT_CLR | SD_OC_CLR;
335 val = SD_OCP_INT_CLR | SD_OC_CLR;
336
337 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, data: val);
338
339 udelay(usec: 1000);
340 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, data: 0);
341
342}
343
344static void rts5261_process_ocp(struct rtsx_pcr *pcr)
345{
346 if (!pcr->option.ocp_en)
347 return;
348
349 rtsx_pci_get_ocpstat(pcr, val: &pcr->ocp_stat);
350
351 if (pcr->ocp_stat & (SD_OC_NOW | SD_OC_EVER)) {
352 rts5261_clear_ocpstat(pcr);
353 rts5261_card_power_off(pcr, RTSX_SD_CARD);
354 rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, data: 0);
355 pcr->ocp_stat = 0;
356 }
357
358}
359
360static void rts5261_init_from_hw(struct rtsx_pcr *pcr)
361{
362 struct pci_dev *pdev = pcr->pci;
363 u32 lval1, lval2, i;
364 u16 setting_reg1, setting_reg2;
365 u8 valid, efuse_valid, tmp;
366
367 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
368 REG_EFUSE_POR | REG_EFUSE_POWER_MASK,
369 REG_EFUSE_POR | REG_EFUSE_POWERON);
370 udelay(usec: 1);
371 rtsx_pci_write_register(pcr, RTS5261_EFUSE_ADDR,
372 RTS5261_EFUSE_ADDR_MASK, data: 0x00);
373 rtsx_pci_write_register(pcr, RTS5261_EFUSE_CTL,
374 RTS5261_EFUSE_ENABLE | RTS5261_EFUSE_MODE_MASK,
375 RTS5261_EFUSE_ENABLE);
376
377 /* Wait transfer end */
378 for (i = 0; i < MAX_RW_REG_CNT; i++) {
379 rtsx_pci_read_register(pcr, RTS5261_EFUSE_CTL, data: &tmp);
380 if ((tmp & 0x80) == 0)
381 break;
382 }
383 rtsx_pci_read_register(pcr, RTS5261_EFUSE_READ_DATA, data: &tmp);
384 efuse_valid = ((tmp & 0x0C) >> 2);
385 pcr_dbg(pcr, "Load efuse valid: 0x%x\n", efuse_valid);
386
387 pci_read_config_dword(dev: pdev, PCR_SETTING_REG2, val: &lval2);
388 pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, lval2);
389 /* 0x816 */
390 valid = (u8)((lval2 >> 16) & 0x03);
391
392 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
393 REG_EFUSE_POR, data: 0);
394 pcr_dbg(pcr, "Disable efuse por!\n");
395
396 if (efuse_valid == 2 || efuse_valid == 3) {
397 if (valid == 3) {
398 /* Bypass efuse */
399 setting_reg1 = PCR_SETTING_REG1;
400 setting_reg2 = PCR_SETTING_REG2;
401 } else {
402 /* Use efuse data */
403 setting_reg1 = PCR_SETTING_REG4;
404 setting_reg2 = PCR_SETTING_REG5;
405 }
406 } else if (efuse_valid == 0) {
407 // default
408 setting_reg1 = PCR_SETTING_REG1;
409 setting_reg2 = PCR_SETTING_REG2;
410 } else {
411 return;
412 }
413
414 pci_read_config_dword(dev: pdev, where: setting_reg2, val: &lval2);
415 pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", setting_reg2, lval2);
416
417 if (!rts5261_vendor_setting_valid(lval2)) {
418 /* Not support MMC default */
419 pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
420 pcr_dbg(pcr, "skip fetch vendor setting\n");
421 return;
422 }
423
424 if (!rts5261_reg_check_mmc_support(lval2))
425 pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
426
427 pcr->rtd3_en = rts5261_reg_to_rtd3(lval2);
428
429 if (rts5261_reg_check_reverse_socket(lval2))
430 pcr->flags |= PCR_REVERSE_SOCKET;
431
432 pci_read_config_dword(dev: pdev, where: setting_reg1, val: &lval1);
433 pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", setting_reg1, lval1);
434
435 pcr->aspm_en = rts5261_reg_to_aspm(lval1);
436 pcr->sd30_drive_sel_1v8 = rts5261_reg_to_sd30_drive_sel_1v8(lval1);
437 pcr->sd30_drive_sel_3v3 = rts5261_reg_to_sd30_drive_sel_3v3(lval1);
438
439 if (setting_reg1 == PCR_SETTING_REG1) {
440 /* store setting */
441 rtsx_pci_write_register(pcr, addr: 0xFF0C, mask: 0xFF, data: (u8)(lval1 & 0xFF));
442 rtsx_pci_write_register(pcr, addr: 0xFF0D, mask: 0xFF, data: (u8)((lval1 >> 8) & 0xFF));
443 rtsx_pci_write_register(pcr, addr: 0xFF0E, mask: 0xFF, data: (u8)((lval1 >> 16) & 0xFF));
444 rtsx_pci_write_register(pcr, addr: 0xFF0F, mask: 0xFF, data: (u8)((lval1 >> 24) & 0xFF));
445 rtsx_pci_write_register(pcr, addr: 0xFF10, mask: 0xFF, data: (u8)(lval2 & 0xFF));
446 rtsx_pci_write_register(pcr, addr: 0xFF11, mask: 0xFF, data: (u8)((lval2 >> 8) & 0xFF));
447 rtsx_pci_write_register(pcr, addr: 0xFF12, mask: 0xFF, data: (u8)((lval2 >> 16) & 0xFF));
448
449 pci_write_config_dword(dev: pdev, PCR_SETTING_REG4, val: lval1);
450 lval2 = lval2 & 0x00FFFFFF;
451 pci_write_config_dword(dev: pdev, PCR_SETTING_REG5, val: lval2);
452 }
453}
454
455static void rts5261_init_from_cfg(struct rtsx_pcr *pcr)
456{
457 struct rtsx_cr_option *option = &pcr->option;
458
459 if (option->ltr_en) {
460 if (option->ltr_enabled)
461 rtsx_set_ltr_latency(pcr, latency: option->ltr_active_latency);
462 }
463}
464
465static int rts5261_extra_init_hw(struct rtsx_pcr *pcr)
466{
467 struct rtsx_cr_option *option = &pcr->option;
468 u32 val;
469
470 rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG1,
471 CD_RESUME_EN_MASK, CD_RESUME_EN_MASK);
472
473 rts5261_init_from_cfg(pcr);
474 rts5261_init_from_hw(pcr);
475
476 /* power off efuse */
477 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
478 REG_EFUSE_POWER_MASK, REG_EFUSE_POWEROFF);
479 rtsx_pci_write_register(pcr, L1SUB_CONFIG1,
480 AUX_CLK_ACTIVE_SEL_MASK, MAC_CKSW_DONE);
481 rtsx_pci_write_register(pcr, L1SUB_CONFIG3, mask: 0xFF, data: 0);
482
483 if (is_version_higher_than(pcr, PID_5261, IC_VER_B)) {
484 val = rtsx_pci_readl(pcr, RTSX_DUM_REG);
485 rtsx_pci_writel(pcr, RTSX_DUM_REG, val | 0x1);
486 }
487 rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
488 RTS5261_AUX_CLK_16M_EN, data: 0);
489
490 /* Release PRSNT# */
491 rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
492 RTS5261_FORCE_PRSNT_LOW, data: 0);
493 rtsx_pci_write_register(pcr, FUNC_FORCE_CTL,
494 FUNC_FORCE_UPME_XMT_DBG, FUNC_FORCE_UPME_XMT_DBG);
495
496 rtsx_pci_write_register(pcr, PCLK_CTL,
497 PCLK_MODE_SEL, PCLK_MODE_SEL);
498
499 rtsx_pci_write_register(pcr, PM_EVENT_DEBUG, PME_DEBUG_0, PME_DEBUG_0);
500 rtsx_pci_write_register(pcr, PM_CLK_FORCE_CTL, CLK_PM_EN, CLK_PM_EN);
501
502 /* LED shine disabled, set initial shine cycle period */
503 rtsx_pci_write_register(pcr, OLT_LED_CTL, mask: 0x0F, data: 0x02);
504
505 /* Configure driving */
506 rts5261_fill_driving(pcr, OUTPUT_3V3);
507
508 if (pcr->flags & PCR_REVERSE_SOCKET)
509 rtsx_pci_write_register(pcr, PETXCFG, mask: 0x30, data: 0x30);
510 else
511 rtsx_pci_write_register(pcr, PETXCFG, mask: 0x30, data: 0x00);
512
513 /*
514 * If u_force_clkreq_0 is enabled, CLKREQ# PIN will be forced
515 * to drive low, and we forcibly request clock.
516 */
517 if (option->force_clkreq_0)
518 rtsx_pci_write_register(pcr, PETXCFG,
519 FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_LOW);
520 else
521 rtsx_pci_write_register(pcr, PETXCFG,
522 FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_HIGH);
523
524 rtsx_pci_write_register(pcr, PWD_SUSPEND_EN, mask: 0xFF, data: 0xFB);
525
526 if (pcr->rtd3_en) {
527 rtsx_pci_write_register(pcr, addr: pcr->reg_pm_ctrl3, mask: 0x01, data: 0x01);
528 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
529 FORCE_PM_CONTROL | FORCE_PM_VALUE,
530 FORCE_PM_CONTROL | FORCE_PM_VALUE);
531 } else {
532 rtsx_pci_write_register(pcr, addr: pcr->reg_pm_ctrl3, mask: 0x01, data: 0x00);
533 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
534 FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
535 }
536 rtsx_pci_write_register(pcr, addr: pcr->reg_pm_ctrl3, D3_DELINK_MODE_EN, data: 0x00);
537
538 /* Clear Enter RTD3_cold Information*/
539 rtsx_pci_write_register(pcr, RTS5261_FW_CTL,
540 RTS5261_INFORM_RTD3_COLD, data: 0);
541
542 return 0;
543}
544
545static void rts5261_enable_aspm(struct rtsx_pcr *pcr, bool enable)
546{
547 u8 val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
548 u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
549
550 if (pcr->aspm_enabled == enable)
551 return;
552
553 val |= (pcr->aspm_en & 0x02);
554 rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, data: val);
555 pcie_capability_clear_and_set_word(dev: pcr->pci, PCI_EXP_LNKCTL,
556 PCI_EXP_LNKCTL_ASPMC, set: pcr->aspm_en);
557 pcr->aspm_enabled = enable;
558}
559
560static void rts5261_disable_aspm(struct rtsx_pcr *pcr, bool enable)
561{
562 u8 val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
563 u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
564
565 if (pcr->aspm_enabled == enable)
566 return;
567
568 pcie_capability_clear_and_set_word(dev: pcr->pci, PCI_EXP_LNKCTL,
569 PCI_EXP_LNKCTL_ASPMC, set: 0);
570 rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, data: val);
571 rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, data: 0);
572 udelay(usec: 10);
573 pcr->aspm_enabled = enable;
574}
575
576static void rts5261_set_aspm(struct rtsx_pcr *pcr, bool enable)
577{
578 if (enable)
579 rts5261_enable_aspm(pcr, enable: true);
580 else
581 rts5261_disable_aspm(pcr, enable: false);
582}
583
584static void rts5261_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
585{
586 struct rtsx_cr_option *option = &pcr->option;
587 int aspm_L1_1, aspm_L1_2;
588 u8 val = 0;
589
590 aspm_L1_1 = rtsx_check_dev_flag(pcr, ASPM_L1_1_EN);
591 aspm_L1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN);
592
593 if (active) {
594 /* run, latency: 60us */
595 if (aspm_L1_1)
596 val = option->ltr_l1off_snooze_sspwrgate;
597 } else {
598 /* l1off, latency: 300us */
599 if (aspm_L1_2)
600 val = option->ltr_l1off_sspwrgate;
601 }
602
603 rtsx_set_l1off_sub(pcr, val);
604}
605
606static const struct pcr_ops rts5261_pcr_ops = {
607 .turn_on_led = rts5261_turn_on_led,
608 .turn_off_led = rts5261_turn_off_led,
609 .extra_init_hw = rts5261_extra_init_hw,
610 .enable_auto_blink = rts5261_enable_auto_blink,
611 .disable_auto_blink = rts5261_disable_auto_blink,
612 .card_power_on = rts5261_card_power_on,
613 .card_power_off = rts5261_card_power_off,
614 .switch_output_voltage = rts5261_switch_output_voltage,
615 .force_power_down = rts5261_force_power_down,
616 .stop_cmd = rts5261_stop_cmd,
617 .set_aspm = rts5261_set_aspm,
618 .set_l1off_cfg_sub_d0 = rts5261_set_l1off_cfg_sub_d0,
619 .enable_ocp = rts5261_enable_ocp,
620 .disable_ocp = rts5261_disable_ocp,
621 .init_ocp = rts5261_init_ocp,
622 .process_ocp = rts5261_process_ocp,
623 .clear_ocpstat = rts5261_clear_ocpstat,
624};
625
626static inline u8 double_ssc_depth(u8 depth)
627{
628 return ((depth > 1) ? (depth - 1) : depth);
629}
630
631int rts5261_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
632 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
633{
634 int err, clk;
635 u16 n;
636 u8 clk_divider, mcu_cnt, div;
637 static const u8 depth[] = {
638 [RTSX_SSC_DEPTH_4M] = RTS5261_SSC_DEPTH_4M,
639 [RTSX_SSC_DEPTH_2M] = RTS5261_SSC_DEPTH_2M,
640 [RTSX_SSC_DEPTH_1M] = RTS5261_SSC_DEPTH_1M,
641 [RTSX_SSC_DEPTH_500K] = RTS5261_SSC_DEPTH_512K,
642 };
643
644 if (initial_mode) {
645 /* We use 250k(around) here, in initial stage */
646 if (is_version_higher_than(pcr, PID_5261, IC_VER_C)) {
647 clk_divider = SD_CLK_DIVIDE_256;
648 card_clock = 60000000;
649 } else {
650 clk_divider = SD_CLK_DIVIDE_128;
651 card_clock = 30000000;
652 }
653 } else {
654 clk_divider = SD_CLK_DIVIDE_0;
655 }
656 err = rtsx_pci_write_register(pcr, SD_CFG1,
657 SD_CLK_DIVIDE_MASK, data: clk_divider);
658 if (err < 0)
659 return err;
660
661 card_clock /= 1000000;
662 pcr_dbg(pcr, "Switch card clock to %dMHz\n", card_clock);
663
664 clk = card_clock;
665 if (!initial_mode && double_clk)
666 clk = card_clock * 2;
667 pcr_dbg(pcr, "Internal SSC clock: %dMHz (cur_clock = %d)\n",
668 clk, pcr->cur_clock);
669
670 if (clk == pcr->cur_clock)
671 return 0;
672
673 if (pcr->ops->conv_clk_and_div_n)
674 n = pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
675 else
676 n = clk - 4;
677 if ((clk <= 4) || (n > 396))
678 return -EINVAL;
679
680 mcu_cnt = 125/clk + 3;
681 if (mcu_cnt > 15)
682 mcu_cnt = 15;
683
684 div = CLK_DIV_1;
685 while ((n < MIN_DIV_N_PCR - 4) && (div < CLK_DIV_8)) {
686 if (pcr->ops->conv_clk_and_div_n) {
687 int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
688 DIV_N_TO_CLK) * 2;
689 n = pcr->ops->conv_clk_and_div_n(dbl_clk,
690 CLK_TO_DIV_N);
691 } else {
692 n = (n + 4) * 2 - 4;
693 }
694 div++;
695 }
696
697 n = (n / 2) - 1;
698 pcr_dbg(pcr, "n = %d, div = %d\n", n, div);
699
700 ssc_depth = depth[ssc_depth];
701 if (double_clk)
702 ssc_depth = double_ssc_depth(depth: ssc_depth);
703
704 if (ssc_depth) {
705 if (div == CLK_DIV_2) {
706 if (ssc_depth > 1)
707 ssc_depth -= 1;
708 else
709 ssc_depth = RTS5261_SSC_DEPTH_8M;
710 } else if (div == CLK_DIV_4) {
711 if (ssc_depth > 2)
712 ssc_depth -= 2;
713 else
714 ssc_depth = RTS5261_SSC_DEPTH_8M;
715 } else if (div == CLK_DIV_8) {
716 if (ssc_depth > 3)
717 ssc_depth -= 3;
718 else
719 ssc_depth = RTS5261_SSC_DEPTH_8M;
720 }
721 } else {
722 ssc_depth = 0;
723 }
724 pcr_dbg(pcr, "ssc_depth = %d\n", ssc_depth);
725
726 rtsx_pci_init_cmd(pcr);
727 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
728 CLK_LOW_FREQ, CLK_LOW_FREQ);
729 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
730 mask: 0xFF, data: (div << 4) | mcu_cnt);
731 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, data: 0);
732 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
733 SSC_DEPTH_MASK, data: ssc_depth);
734 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, mask: 0xFF, data: n);
735 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
736 if (vpclk) {
737 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
738 PHASE_NOT_RESET, data: 0);
739 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK1_CTL,
740 PHASE_NOT_RESET, data: 0);
741 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
742 PHASE_NOT_RESET, PHASE_NOT_RESET);
743 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK1_CTL,
744 PHASE_NOT_RESET, PHASE_NOT_RESET);
745 }
746
747 err = rtsx_pci_send_cmd(pcr, timeout: 2000);
748 if (err < 0)
749 return err;
750
751 /* Wait SSC clock stable */
752 udelay(SSC_CLOCK_STABLE_WAIT);
753 err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, data: 0);
754 if (err < 0)
755 return err;
756
757 pcr->cur_clock = clk;
758 return 0;
759
760}
761
762void rts5261_init_params(struct rtsx_pcr *pcr)
763{
764 struct rtsx_cr_option *option = &pcr->option;
765 struct rtsx_hw_param *hw_param = &pcr->hw_param;
766 u8 val;
767
768 pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
769 rtsx_pci_read_register(pcr, RTS5261_FW_STATUS, data: &val);
770 if (!(val & RTS5261_EXPRESS_LINK_FAIL_MASK))
771 pcr->extra_caps |= EXTRA_CAPS_SD_EXPRESS;
772 pcr->num_slots = 1;
773 pcr->ops = &rts5261_pcr_ops;
774
775 pcr->flags = 0;
776 pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
777 pcr->sd30_drive_sel_1v8 = 0x00;
778 pcr->sd30_drive_sel_3v3 = 0x00;
779 pcr->aspm_en = ASPM_L1_EN;
780 pcr->aspm_mode = ASPM_MODE_REG;
781 pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 11);
782 pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
783
784 pcr->ic_version = rts5261_get_ic_version(pcr);
785 pcr->sd_pull_ctl_enable_tbl = rts5261_sd_pull_ctl_enable_tbl;
786 pcr->sd_pull_ctl_disable_tbl = rts5261_sd_pull_ctl_disable_tbl;
787
788 pcr->reg_pm_ctrl3 = RTS5261_AUTOLOAD_CFG3;
789
790 option->dev_flags = (LTR_L1SS_PWR_GATE_CHECK_CARD_EN
791 | LTR_L1SS_PWR_GATE_EN);
792 option->ltr_en = true;
793
794 /* init latency of active, idle, L1OFF to 60us, 300us, 3ms */
795 option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
796 option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
797 option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
798 option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
799 option->ltr_l1off_sspwrgate = 0x7F;
800 option->ltr_l1off_snooze_sspwrgate = 0x78;
801
802 option->ocp_en = 1;
803 hw_param->interrupt_en |= SD_OC_INT_EN;
804 hw_param->ocp_glitch = SD_OCP_GLITCH_800U;
805 option->sd_800mA_ocp_thd = RTS5261_LDO1_OCP_THD_1040;
806}
807

source code of linux/drivers/misc/cardreader/rts5261.c