1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Driver for Realtek PCI-Express card reader
3  *
4  * Copyright(c) 2016-2017 Realtek Semiconductor Corp. All rights reserved.
5  *
6  * Author:
7  *   Steven FENG <steven_feng@realsil.com.cn>
8  *   Rui FENG <rui_feng@realsil.com.cn>
9  *   Wei WANG <wei_wang@realsil.com.cn>
10  */
11 
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/rtsx_pci.h>
15 
16 #include "rts5260.h"
17 #include "rtsx_pcr.h"
18 
19 static u8 rts5260_get_ic_version(struct rtsx_pcr *pcr)
20 {
21 	u8 val;
22 
23 	rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
24 	return val & IC_VERSION_MASK;
25 }
26 
27 static void rts5260_fill_driving(struct rtsx_pcr *pcr, u8 voltage)
28 {
29 	u8 driving_3v3[6][3] = {
30 		{0x94, 0x94, 0x94},
31 		{0x11, 0x11, 0x18},
32 		{0x55, 0x55, 0x5C},
33 		{0x94, 0x94, 0x94},
34 		{0x94, 0x94, 0x94},
35 		{0xFF, 0xFF, 0xFF},
36 	};
37 	u8 driving_1v8[6][3] = {
38 		{0x9A, 0x89, 0x89},
39 		{0xC4, 0xC4, 0xC4},
40 		{0x3C, 0x3C, 0x3C},
41 		{0x9B, 0x99, 0x99},
42 		{0x9A, 0x89, 0x89},
43 		{0xFE, 0xFE, 0xFE},
44 	};
45 	u8 (*driving)[3], drive_sel;
46 
47 	if (voltage == OUTPUT_3V3) {
48 		driving = driving_3v3;
49 		drive_sel = pcr->sd30_drive_sel_3v3;
50 	} else {
51 		driving = driving_1v8;
52 		drive_sel = pcr->sd30_drive_sel_1v8;
53 	}
54 
55 	rtsx_pci_write_register(pcr, SD30_CLK_DRIVE_SEL,
56 			 0xFF, driving[drive_sel][0]);
57 
58 	rtsx_pci_write_register(pcr, SD30_CMD_DRIVE_SEL,
59 			 0xFF, driving[drive_sel][1]);
60 
61 	rtsx_pci_write_register(pcr, SD30_CMD_DRIVE_SEL,
62 			 0xFF, driving[drive_sel][2]);
63 }
64 
65 static void rtsx_base_fetch_vendor_settings(struct rtsx_pcr *pcr)
66 {
67 	u32 reg;
68 
69 	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
70 	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
71 
72 	if (!rtsx_vendor_setting_valid(reg)) {
73 		pcr_dbg(pcr, "skip fetch vendor setting\n");
74 		return;
75 	}
76 
77 	pcr->aspm_en = rtsx_reg_to_aspm(reg);
78 	pcr->sd30_drive_sel_1v8 = rtsx_reg_to_sd30_drive_sel_1v8(reg);
79 	pcr->card_drive_sel &= 0x3F;
80 	pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg);
81 
82 	rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, &reg);
83 	pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
84 	pcr->sd30_drive_sel_3v3 = rtsx_reg_to_sd30_drive_sel_3v3(reg);
85 	if (rtsx_reg_check_reverse_socket(reg))
86 		pcr->flags |= PCR_REVERSE_SOCKET;
87 }
88 
89 static void rtsx_base_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
90 {
91 	/* Set relink_time to 0 */
92 	rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, MASK_8_BIT_DEF, 0);
93 	rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, MASK_8_BIT_DEF, 0);
94 	rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3,
95 				RELINK_TIME_MASK, 0);
96 
97 	if (pm_state == HOST_ENTER_S3)
98 		rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3,
99 					D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
100 
101 	rtsx_pci_write_register(pcr, FPDCTL, ALL_POWER_DOWN, ALL_POWER_DOWN);
102 }
103 
104 static int rtsx_base_enable_auto_blink(struct rtsx_pcr *pcr)
105 {
106 	return rtsx_pci_write_register(pcr, OLT_LED_CTL,
107 		LED_SHINE_MASK, LED_SHINE_EN);
108 }
109 
110 static int rtsx_base_disable_auto_blink(struct rtsx_pcr *pcr)
111 {
112 	return rtsx_pci_write_register(pcr, OLT_LED_CTL,
113 		LED_SHINE_MASK, LED_SHINE_DISABLE);
114 }
115 
116 static int rts5260_turn_on_led(struct rtsx_pcr *pcr)
117 {
118 	return rtsx_pci_write_register(pcr, RTS5260_REG_GPIO_CTL0,
119 		RTS5260_REG_GPIO_MASK, RTS5260_REG_GPIO_ON);
120 }
121 
122 static int rts5260_turn_off_led(struct rtsx_pcr *pcr)
123 {
124 	return rtsx_pci_write_register(pcr, RTS5260_REG_GPIO_CTL0,
125 		RTS5260_REG_GPIO_MASK, RTS5260_REG_GPIO_OFF);
126 }
127 
128 /* SD Pull Control Enable:
129  *     SD_DAT[3:0] ==> pull up
130  *     SD_CD       ==> pull up
131  *     SD_WP       ==> pull up
132  *     SD_CMD      ==> pull up
133  *     SD_CLK      ==> pull down
134  */
135 static const u32 rts5260_sd_pull_ctl_enable_tbl[] = {
136 	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
137 	RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
138 	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
139 	RTSX_REG_PAIR(CARD_PULL_CTL4, 0xAA),
140 	0,
141 };
142 
143 /* SD Pull Control Disable:
144  *     SD_DAT[3:0] ==> pull down
145  *     SD_CD       ==> pull up
146  *     SD_WP       ==> pull down
147  *     SD_CMD      ==> pull down
148  *     SD_CLK      ==> pull down
149  */
150 static const u32 rts5260_sd_pull_ctl_disable_tbl[] = {
151 	RTSX_REG_PAIR(CARD_PULL_CTL1, 0x66),
152 	RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
153 	RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
154 	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
155 	0,
156 };
157 
158 /* MS Pull Control Enable:
159  *     MS CD       ==> pull up
160  *     others      ==> pull down
161  */
162 static const u32 rts5260_ms_pull_ctl_enable_tbl[] = {
163 	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
164 	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
165 	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
166 	0,
167 };
168 
169 /* MS Pull Control Disable:
170  *     MS CD       ==> pull up
171  *     others      ==> pull down
172  */
173 static const u32 rts5260_ms_pull_ctl_disable_tbl[] = {
174 	RTSX_REG_PAIR(CARD_PULL_CTL4, 0x55),
175 	RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
176 	RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
177 	0,
178 };
179 
180 static int sd_set_sample_push_timing_sd30(struct rtsx_pcr *pcr)
181 {
182 	rtsx_pci_write_register(pcr, SD_CFG1, SD_MODE_SELECT_MASK
183 		| SD_ASYNC_FIFO_NOT_RST, SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
184 	rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, CLK_LOW_FREQ);
185 	rtsx_pci_write_register(pcr, CARD_CLK_SOURCE, 0xFF,
186 			CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
187 	rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
188 
189 	return 0;
190 }
191 
192 static int rts5260_card_power_on(struct rtsx_pcr *pcr, int card)
193 {
194 	struct rtsx_cr_option *option = &pcr->option;
195 
196 	if (option->ocp_en)
197 		rtsx_pci_enable_ocp(pcr);
198 
199 
200 	rtsx_pci_write_register(pcr, LDO_CONFIG2, DV331812_VDD1, DV331812_VDD1);
201 	rtsx_pci_write_register(pcr, LDO_VCC_CFG0,
202 			 RTS5260_DVCC_TUNE_MASK, RTS5260_DVCC_33);
203 
204 	rtsx_pci_write_register(pcr, LDO_VCC_CFG1, LDO_POW_SDVDD1_MASK,
205 			LDO_POW_SDVDD1_ON);
206 
207 	rtsx_pci_write_register(pcr, LDO_CONFIG2,
208 			 DV331812_POWERON, DV331812_POWERON);
209 	msleep(20);
210 
211 	if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50 ||
212 	    pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
213 		sd_set_sample_push_timing_sd30(pcr);
214 
215 	/* Initialize SD_CFG1 register */
216 	rtsx_pci_write_register(pcr, SD_CFG1, 0xFF,
217 				SD_CLK_DIVIDE_128 | SD_20_MODE);
218 
219 	rtsx_pci_write_register(pcr, SD_SAMPLE_POINT_CTL,
220 				0xFF, SD20_RX_POS_EDGE);
221 	rtsx_pci_write_register(pcr, SD_PUSH_POINT_CTL, 0xFF, 0);
222 	rtsx_pci_write_register(pcr, CARD_STOP, SD_STOP | SD_CLR_ERR,
223 				SD_STOP | SD_CLR_ERR);
224 
225 	/* Reset SD_CFG3 register */
226 	rtsx_pci_write_register(pcr, SD_CFG3, SD30_CLK_END_EN, 0);
227 	rtsx_pci_write_register(pcr, REG_SD_STOP_SDCLK_CFG,
228 			SD30_CLK_STOP_CFG_EN | SD30_CLK_STOP_CFG1 |
229 			SD30_CLK_STOP_CFG0, 0);
230 
231 	rtsx_pci_write_register(pcr, REG_PRE_RW_MODE, EN_INFINITE_MODE, 0);
232 
233 	return 0;
234 }
235 
236 static int rts5260_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
237 {
238 	switch (voltage) {
239 	case OUTPUT_3V3:
240 		rtsx_pci_write_register(pcr, LDO_CONFIG2,
241 					DV331812_VDD1, DV331812_VDD1);
242 		rtsx_pci_write_register(pcr, LDO_DV18_CFG,
243 					DV331812_MASK, DV331812_33);
244 		rtsx_pci_write_register(pcr, SD_PAD_CTL, SD_IO_USING_1V8, 0);
245 		break;
246 	case OUTPUT_1V8:
247 		rtsx_pci_write_register(pcr, LDO_CONFIG2,
248 					DV331812_VDD1, DV331812_VDD1);
249 		rtsx_pci_write_register(pcr, LDO_DV18_CFG,
250 					DV331812_MASK, DV331812_17);
251 		rtsx_pci_write_register(pcr, SD_PAD_CTL, SD_IO_USING_1V8,
252 					SD_IO_USING_1V8);
253 		break;
254 	default:
255 		return -EINVAL;
256 	}
257 
258 	/* set pad drive */
259 	rts5260_fill_driving(pcr, voltage);
260 
261 	return 0;
262 }
263 
264 static void rts5260_stop_cmd(struct rtsx_pcr *pcr)
265 {
266 	rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
267 	rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
268 	rtsx_pci_write_register(pcr, RTS5260_DMA_RST_CTL_0,
269 				RTS5260_DMA_RST | RTS5260_ADMA3_RST,
270 				RTS5260_DMA_RST | RTS5260_ADMA3_RST);
271 	rtsx_pci_write_register(pcr, RBCTL, RB_FLUSH, RB_FLUSH);
272 }
273 
274 static void rts5260_card_before_power_off(struct rtsx_pcr *pcr)
275 {
276 	rts5260_stop_cmd(pcr);
277 	rts5260_switch_output_voltage(pcr, OUTPUT_3V3);
278 
279 }
280 
281 static int rts5260_card_power_off(struct rtsx_pcr *pcr, int card)
282 {
283 	int err = 0;
284 
285 	rts5260_card_before_power_off(pcr);
286 	err = rtsx_pci_write_register(pcr, LDO_VCC_CFG1,
287 			 LDO_POW_SDVDD1_MASK, LDO_POW_SDVDD1_OFF);
288 	err = rtsx_pci_write_register(pcr, LDO_CONFIG2,
289 			 DV331812_POWERON, DV331812_POWEROFF);
290 	if (pcr->option.ocp_en)
291 		rtsx_pci_disable_ocp(pcr);
292 
293 	return err;
294 }
295 
296 static void rts5260_init_ocp(struct rtsx_pcr *pcr)
297 {
298 	struct rtsx_cr_option *option = &pcr->option;
299 
300 	if (option->ocp_en) {
301 		u8 mask, val;
302 
303 
304 		rtsx_pci_write_register(pcr, RTS5260_DVCC_CTRL,
305 				RTS5260_DVCC_OCP_THD_MASK,
306 				option->sd_800mA_ocp_thd);
307 
308 		rtsx_pci_write_register(pcr, RTS5260_DV331812_CFG,
309 				RTS5260_DV331812_OCP_THD_MASK,
310 				RTS5260_DV331812_OCP_THD_270);
311 
312 		mask = SD_OCP_GLITCH_MASK;
313 		val = pcr->hw_param.ocp_glitch;
314 		rtsx_pci_write_register(pcr, REG_OCPGLITCH, mask, val);
315 		rtsx_pci_write_register(pcr, RTS5260_DVCC_CTRL,
316 					RTS5260_DVCC_OCP_EN |
317 					RTS5260_DVCC_OCP_CL_EN,
318 					RTS5260_DVCC_OCP_EN |
319 					RTS5260_DVCC_OCP_CL_EN);
320 
321 		rtsx_pci_enable_ocp(pcr);
322 	} else {
323 		rtsx_pci_write_register(pcr, RTS5260_DVCC_CTRL,
324 					RTS5260_DVCC_OCP_EN |
325 					RTS5260_DVCC_OCP_CL_EN, 0);
326 	}
327 }
328 
329 static void rts5260_enable_ocp(struct rtsx_pcr *pcr)
330 {
331 	u8 val = 0;
332 
333 	val = SD_OCP_INT_EN | SD_DETECT_EN;
334 	rtsx_pci_write_register(pcr, REG_OCPCTL, 0xFF, val);
335 
336 }
337 
338 static void rts5260_disable_ocp(struct rtsx_pcr *pcr)
339 {
340 	u8 mask = 0;
341 
342 	mask = SD_OCP_INT_EN | SD_DETECT_EN;
343 	rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
344 
345 }
346 
347 
348 static int rts5260_get_ocpstat(struct rtsx_pcr *pcr, u8 *val)
349 {
350 	return rtsx_pci_read_register(pcr, REG_OCPSTAT, val);
351 }
352 
353 static int rts5260_get_ocpstat2(struct rtsx_pcr *pcr, u8 *val)
354 {
355 	return rtsx_pci_read_register(pcr, REG_DV3318_OCPSTAT, val);
356 }
357 
358 static void rts5260_clear_ocpstat(struct rtsx_pcr *pcr)
359 {
360 	u8 mask = 0;
361 	u8 val = 0;
362 
363 	mask = SD_OCP_INT_CLR | SD_OC_CLR;
364 	val = SD_OCP_INT_CLR | SD_OC_CLR;
365 
366 	rtsx_pci_write_register(pcr, REG_OCPCTL, mask, val);
367 	rtsx_pci_write_register(pcr, REG_DV3318_OCPCTL,
368 				DV3318_OCP_INT_CLR | DV3318_OCP_CLR,
369 				DV3318_OCP_INT_CLR | DV3318_OCP_CLR);
370 	udelay(10);
371 	rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
372 	rtsx_pci_write_register(pcr, REG_DV3318_OCPCTL,
373 				DV3318_OCP_INT_CLR | DV3318_OCP_CLR, 0);
374 }
375 
376 static void rts5260_process_ocp(struct rtsx_pcr *pcr)
377 {
378 	if (!pcr->option.ocp_en)
379 		return;
380 
381 	rtsx_pci_get_ocpstat(pcr, &pcr->ocp_stat);
382 	rts5260_get_ocpstat2(pcr, &pcr->ocp_stat2);
383 
384 	if ((pcr->ocp_stat & (SD_OC_NOW | SD_OC_EVER)) ||
385 		(pcr->ocp_stat2 & (DV3318_OCP_NOW | DV3318_OCP_EVER))) {
386 		rtsx_pci_card_power_off(pcr, RTSX_SD_CARD);
387 		rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, 0);
388 		rtsx_pci_clear_ocpstat(pcr);
389 		pcr->ocp_stat = 0;
390 		pcr->ocp_stat2 = 0;
391 	}
392 
393 }
394 
395 static int rts5260_init_hw(struct rtsx_pcr *pcr)
396 {
397 	int err;
398 
399 	rtsx_pci_init_cmd(pcr);
400 
401 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, L1SUB_CONFIG1,
402 			 AUX_CLK_ACTIVE_SEL_MASK, MAC_CKSW_DONE);
403 	/* Rest L1SUB Config */
404 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, L1SUB_CONFIG3, 0xFF, 0x00);
405 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PM_CLK_FORCE_CTL,
406 			 CLK_PM_EN, CLK_PM_EN);
407 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWD_SUSPEND_EN, 0xFF, 0xFF);
408 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
409 			 PWR_GATE_EN, PWR_GATE_EN);
410 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, REG_VREF,
411 			 PWD_SUSPND_EN, PWD_SUSPND_EN);
412 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RBCTL,
413 			 U_AUTO_DMA_EN_MASK, U_AUTO_DMA_DISABLE);
414 
415 	if (pcr->flags & PCR_REVERSE_SOCKET)
416 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0xB0, 0xB0);
417 	else
418 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0xB0, 0x80);
419 
420 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OBFF_CFG,
421 			 OBFF_EN_MASK, OBFF_DISABLE);
422 
423 	err = rtsx_pci_send_cmd(pcr, CMD_TIMEOUT_DEF);
424 	if (err < 0)
425 		return err;
426 
427 	rtsx_pci_init_ocp(pcr);
428 
429 	return 0;
430 }
431 
432 static void rts5260_pwr_saving_setting(struct rtsx_pcr *pcr)
433 {
434 	int lss_l1_1, lss_l1_2;
435 
436 	lss_l1_1 = rtsx_check_dev_flag(pcr, ASPM_L1_1_EN)
437 			| rtsx_check_dev_flag(pcr, PM_L1_1_EN);
438 	lss_l1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN)
439 			| rtsx_check_dev_flag(pcr, PM_L1_2_EN);
440 
441 	rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, 0xFF, 0);
442 	if (lss_l1_2) {
443 		pcr_dbg(pcr, "Set parameters for L1.2.");
444 		rtsx_pci_write_register(pcr, PWR_GLOBAL_CTRL,
445 					0xFF, PCIE_L1_2_EN);
446 		rtsx_pci_write_register(pcr, RTS5260_DVCC_CTRL,
447 					RTS5260_DVCC_OCP_EN |
448 					RTS5260_DVCC_OCP_CL_EN,
449 					RTS5260_DVCC_OCP_EN |
450 					RTS5260_DVCC_OCP_CL_EN);
451 
452 		rtsx_pci_write_register(pcr, PWR_FE_CTL,
453 					0xFF, PCIE_L1_2_PD_FE_EN);
454 	} else if (lss_l1_1) {
455 		pcr_dbg(pcr, "Set parameters for L1.1.");
456 		rtsx_pci_write_register(pcr, PWR_GLOBAL_CTRL,
457 					0xFF, PCIE_L1_1_EN);
458 		rtsx_pci_write_register(pcr, PWR_FE_CTL,
459 					0xFF, PCIE_L1_1_PD_FE_EN);
460 	} else {
461 		pcr_dbg(pcr, "Set parameters for L1.");
462 		rtsx_pci_write_register(pcr, PWR_GLOBAL_CTRL,
463 					0xFF, PCIE_L1_0_EN);
464 		rtsx_pci_write_register(pcr, PWR_FE_CTL,
465 					0xFF, PCIE_L1_0_PD_FE_EN);
466 	}
467 
468 	rtsx_pci_write_register(pcr, CFG_L1_0_PCIE_DPHY_RET_VALUE,
469 				0xFF, CFG_L1_0_RET_VALUE_DEFAULT);
470 	rtsx_pci_write_register(pcr, CFG_L1_0_PCIE_MAC_RET_VALUE,
471 				0xFF, CFG_L1_0_RET_VALUE_DEFAULT);
472 	rtsx_pci_write_register(pcr, CFG_L1_0_CRC_SD30_RET_VALUE,
473 				0xFF, CFG_L1_0_RET_VALUE_DEFAULT);
474 	rtsx_pci_write_register(pcr, CFG_L1_0_CRC_SD40_RET_VALUE,
475 				0xFF, CFG_L1_0_RET_VALUE_DEFAULT);
476 	rtsx_pci_write_register(pcr, CFG_L1_0_SYS_RET_VALUE,
477 				0xFF, CFG_L1_0_RET_VALUE_DEFAULT);
478 	/*Option cut APHY*/
479 	rtsx_pci_write_register(pcr, CFG_PCIE_APHY_OFF_0,
480 				0xFF, CFG_PCIE_APHY_OFF_0_DEFAULT);
481 	rtsx_pci_write_register(pcr, CFG_PCIE_APHY_OFF_1,
482 				0xFF, CFG_PCIE_APHY_OFF_1_DEFAULT);
483 	rtsx_pci_write_register(pcr, CFG_PCIE_APHY_OFF_2,
484 				0xFF, CFG_PCIE_APHY_OFF_2_DEFAULT);
485 	rtsx_pci_write_register(pcr, CFG_PCIE_APHY_OFF_3,
486 				0xFF, CFG_PCIE_APHY_OFF_3_DEFAULT);
487 	/*CDR DEC*/
488 	rtsx_pci_write_register(pcr, PWC_CDR, 0xFF, PWC_CDR_DEFAULT);
489 	/*PWMPFM*/
490 	rtsx_pci_write_register(pcr, CFG_LP_FPWM_VALUE,
491 				0xFF, CFG_LP_FPWM_VALUE_DEFAULT);
492 	/*No Power Saving WA*/
493 	rtsx_pci_write_register(pcr, CFG_L1_0_CRC_MISC_RET_VALUE,
494 				0xFF, CFG_L1_0_CRC_MISC_RET_VALUE_DEFAULT);
495 }
496 
497 static void rts5260_init_from_cfg(struct rtsx_pcr *pcr)
498 {
499 	struct rtsx_cr_option *option = &pcr->option;
500 	u32 lval;
501 
502 	rtsx_pci_read_config_dword(pcr, PCR_ASPM_SETTING_5260, &lval);
503 
504 	if (lval & ASPM_L1_1_EN_MASK)
505 		rtsx_set_dev_flag(pcr, ASPM_L1_1_EN);
506 
507 	if (lval & ASPM_L1_2_EN_MASK)
508 		rtsx_set_dev_flag(pcr, ASPM_L1_2_EN);
509 
510 	if (lval & PM_L1_1_EN_MASK)
511 		rtsx_set_dev_flag(pcr, PM_L1_1_EN);
512 
513 	if (lval & PM_L1_2_EN_MASK)
514 		rtsx_set_dev_flag(pcr, PM_L1_2_EN);
515 
516 	rts5260_pwr_saving_setting(pcr);
517 
518 	if (option->ltr_en) {
519 		u16 val;
520 
521 		pcie_capability_read_word(pcr->pci, PCI_EXP_DEVCTL2, &val);
522 		if (val & PCI_EXP_DEVCTL2_LTR_EN) {
523 			option->ltr_enabled = true;
524 			option->ltr_active = true;
525 			rtsx_set_ltr_latency(pcr, option->ltr_active_latency);
526 		} else {
527 			option->ltr_enabled = false;
528 		}
529 	}
530 
531 	if (rtsx_check_dev_flag(pcr, ASPM_L1_1_EN | ASPM_L1_2_EN
532 				| PM_L1_1_EN | PM_L1_2_EN))
533 		option->force_clkreq_0 = false;
534 	else
535 		option->force_clkreq_0 = true;
536 }
537 
538 static int rts5260_extra_init_hw(struct rtsx_pcr *pcr)
539 {
540 	struct rtsx_cr_option *option = &pcr->option;
541 
542 	/* Set mcu_cnt to 7 to ensure data can be sampled properly */
543 	rtsx_pci_write_register(pcr, 0xFC03, 0x7F, 0x07);
544 	rtsx_pci_write_register(pcr, SSC_DIV_N_0, 0xFF, 0x5D);
545 
546 	rts5260_init_from_cfg(pcr);
547 
548 	/* force no MDIO*/
549 	rtsx_pci_write_register(pcr, RTS5260_AUTOLOAD_CFG4,
550 				0xFF, RTS5260_MIMO_DISABLE);
551 	/*Modify SDVCC Tune Default Parameters!*/
552 	rtsx_pci_write_register(pcr, LDO_VCC_CFG0,
553 				RTS5260_DVCC_TUNE_MASK, RTS5260_DVCC_33);
554 
555 	rtsx_pci_write_register(pcr, PCLK_CTL, PCLK_MODE_SEL, PCLK_MODE_SEL);
556 
557 	rts5260_init_hw(pcr);
558 
559 	/*
560 	 * If u_force_clkreq_0 is enabled, CLKREQ# PIN will be forced
561 	 * to drive low, and we forcibly request clock.
562 	 */
563 	if (option->force_clkreq_0)
564 		rtsx_pci_write_register(pcr, PETXCFG,
565 				 FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_LOW);
566 	else
567 		rtsx_pci_write_register(pcr, PETXCFG,
568 				 FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_HIGH);
569 
570 	return 0;
571 }
572 
573 static void rts5260_set_aspm(struct rtsx_pcr *pcr, bool enable)
574 {
575 	struct rtsx_cr_option *option = &pcr->option;
576 	u8 val = 0;
577 
578 	if (pcr->aspm_enabled == enable)
579 		return;
580 
581 	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
582 		if (enable)
583 			val = pcr->aspm_en;
584 		rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
585 					 ASPM_MASK_NEG, val);
586 	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
587 		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
588 
589 		if (!enable)
590 			val = FORCE_ASPM_CTL0;
591 		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
592 	}
593 
594 	pcr->aspm_enabled = enable;
595 }
596 
597 static void rts5260_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
598 {
599 	struct rtsx_cr_option *option = &pcr->option;
600 	u32 interrupt = rtsx_pci_readl(pcr, RTSX_BIPR);
601 	int card_exist = (interrupt & SD_EXIST) | (interrupt & MS_EXIST);
602 	int aspm_L1_1, aspm_L1_2;
603 	u8 val = 0;
604 
605 	aspm_L1_1 = rtsx_check_dev_flag(pcr, ASPM_L1_1_EN);
606 	aspm_L1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN);
607 
608 	if (active) {
609 		/* run, latency: 60us */
610 		if (aspm_L1_1)
611 			val = option->ltr_l1off_snooze_sspwrgate;
612 	} else {
613 		/* l1off, latency: 300us */
614 		if (aspm_L1_2)
615 			val = option->ltr_l1off_sspwrgate;
616 	}
617 
618 	if (aspm_L1_1 || aspm_L1_2) {
619 		if (rtsx_check_dev_flag(pcr,
620 					LTR_L1SS_PWR_GATE_CHECK_CARD_EN)) {
621 			if (card_exist)
622 				val &= ~L1OFF_MBIAS2_EN_5250;
623 			else
624 				val |= L1OFF_MBIAS2_EN_5250;
625 		}
626 	}
627 	rtsx_set_l1off_sub(pcr, val);
628 }
629 
630 static const struct pcr_ops rts5260_pcr_ops = {
631 	.fetch_vendor_settings = rtsx_base_fetch_vendor_settings,
632 	.turn_on_led = rts5260_turn_on_led,
633 	.turn_off_led = rts5260_turn_off_led,
634 	.extra_init_hw = rts5260_extra_init_hw,
635 	.enable_auto_blink = rtsx_base_enable_auto_blink,
636 	.disable_auto_blink = rtsx_base_disable_auto_blink,
637 	.card_power_on = rts5260_card_power_on,
638 	.card_power_off = rts5260_card_power_off,
639 	.switch_output_voltage = rts5260_switch_output_voltage,
640 	.force_power_down = rtsx_base_force_power_down,
641 	.stop_cmd = rts5260_stop_cmd,
642 	.set_aspm = rts5260_set_aspm,
643 	.set_l1off_cfg_sub_d0 = rts5260_set_l1off_cfg_sub_d0,
644 	.enable_ocp = rts5260_enable_ocp,
645 	.disable_ocp = rts5260_disable_ocp,
646 	.init_ocp = rts5260_init_ocp,
647 	.process_ocp = rts5260_process_ocp,
648 	.get_ocpstat = rts5260_get_ocpstat,
649 	.clear_ocpstat = rts5260_clear_ocpstat,
650 };
651 
652 void rts5260_init_params(struct rtsx_pcr *pcr)
653 {
654 	struct rtsx_cr_option *option = &pcr->option;
655 	struct rtsx_hw_param *hw_param = &pcr->hw_param;
656 
657 	pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
658 	pcr->num_slots = 2;
659 
660 	pcr->flags = 0;
661 	pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
662 	pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
663 	pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
664 	pcr->aspm_en = ASPM_L1_EN;
665 	pcr->tx_initial_phase = SET_CLOCK_PHASE(1, 29, 16);
666 	pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
667 
668 	pcr->ic_version = rts5260_get_ic_version(pcr);
669 	pcr->sd_pull_ctl_enable_tbl = rts5260_sd_pull_ctl_enable_tbl;
670 	pcr->sd_pull_ctl_disable_tbl = rts5260_sd_pull_ctl_disable_tbl;
671 	pcr->ms_pull_ctl_enable_tbl = rts5260_ms_pull_ctl_enable_tbl;
672 	pcr->ms_pull_ctl_disable_tbl = rts5260_ms_pull_ctl_disable_tbl;
673 
674 	pcr->reg_pm_ctrl3 = RTS524A_PM_CTRL3;
675 
676 	pcr->ops = &rts5260_pcr_ops;
677 
678 	option->dev_flags = (LTR_L1SS_PWR_GATE_CHECK_CARD_EN
679 				| LTR_L1SS_PWR_GATE_EN);
680 	option->ltr_en = true;
681 
682 	/* init latency of active, idle, L1OFF to 60us, 300us, 3ms */
683 	option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
684 	option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
685 	option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
686 	option->dev_aspm_mode = DEV_ASPM_DYNAMIC;
687 	option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
688 	option->ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5250_DEF;
689 	option->ltr_l1off_snooze_sspwrgate =
690 		LTR_L1OFF_SNOOZE_SSPWRGATE_5250_DEF;
691 
692 	option->ocp_en = 1;
693 	if (option->ocp_en)
694 		hw_param->interrupt_en |= SD_OC_INT_EN;
695 	hw_param->ocp_glitch =  SD_OCP_GLITCH_100U | SDVIO_OCP_GLITCH_800U;
696 	option->sd_400mA_ocp_thd = RTS5260_DVCC_OCP_THD_550;
697 	option->sd_800mA_ocp_thd = RTS5260_DVCC_OCP_THD_970;
698 }
699