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misc: rtsx: judge ASPM Mode to set PETXCFG Reg
[mirror_ubuntu-kernels.git] / drivers / misc / cardreader / rts5228.c
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 * Ricky WU <ricky_wu@realtek.com>
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 "rts5228.h"
17 #include "rtsx_pcr.h"
18
19 static u8 rts5228_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 rts5228_fill_driving(struct rtsx_pcr *pcr, u8 voltage)
28 {
29 u8 driving_3v3[4][3] = {
30 {0x13, 0x13, 0x13},
31 {0x96, 0x96, 0x96},
32 {0x7F, 0x7F, 0x7F},
33 {0x96, 0x96, 0x96},
34 };
35 u8 driving_1v8[4][3] = {
36 {0x99, 0x99, 0x99},
37 {0xB5, 0xB5, 0xB5},
38 {0xE6, 0x7E, 0xFE},
39 {0x6B, 0x6B, 0x6B},
40 };
41 u8 (*driving)[3], drive_sel;
42
43 if (voltage == OUTPUT_3V3) {
44 driving = driving_3v3;
45 drive_sel = pcr->sd30_drive_sel_3v3;
46 } else {
47 driving = driving_1v8;
48 drive_sel = pcr->sd30_drive_sel_1v8;
49 }
50
51 rtsx_pci_write_register(pcr, SD30_CLK_DRIVE_SEL,
52 0xFF, driving[drive_sel][0]);
53
54 rtsx_pci_write_register(pcr, SD30_CMD_DRIVE_SEL,
55 0xFF, driving[drive_sel][1]);
56
57 rtsx_pci_write_register(pcr, SD30_DAT_DRIVE_SEL,
58 0xFF, driving[drive_sel][2]);
59 }
60
61 static void rtsx5228_fetch_vendor_settings(struct rtsx_pcr *pcr)
62 {
63 struct pci_dev *pdev = pcr->pci;
64 u32 reg;
65
66 /* 0x724~0x727 */
67 pci_read_config_dword(pdev, PCR_SETTING_REG1, &reg);
68 pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
69
70 if (!rtsx_vendor_setting_valid(reg)) {
71 pcr_dbg(pcr, "skip fetch vendor setting\n");
72 return;
73 }
74 pcr->sd30_drive_sel_1v8 = rtsx_reg_to_sd30_drive_sel_1v8(reg);
75 pcr->aspm_en = rtsx_reg_to_aspm(reg);
76
77 /* 0x814~0x817 */
78 pci_read_config_dword(pdev, PCR_SETTING_REG2, &reg);
79 pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
80
81 pcr->rtd3_en = rtsx_reg_to_rtd3(reg);
82 if (rtsx_check_mmc_support(reg))
83 pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
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 int rts5228_optimize_phy(struct rtsx_pcr *pcr)
90 {
91 return rtsx_pci_write_phy_register(pcr, 0x07, 0x8F40);
92 }
93
94 static void rts5228_force_power_down(struct rtsx_pcr *pcr, u8 pm_state, bool runtime)
95 {
96 /* Set relink_time to 0 */
97 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, MASK_8_BIT_DEF, 0);
98 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, MASK_8_BIT_DEF, 0);
99 rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3,
100 RELINK_TIME_MASK, 0);
101
102 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3,
103 D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
104
105 if (!runtime) {
106 rtsx_pci_write_register(pcr, RTS5228_AUTOLOAD_CFG1,
107 CD_RESUME_EN_MASK, 0);
108 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
109 rtsx_pci_write_register(pcr, RTS5228_REG_PME_FORCE_CTL,
110 FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
111 }
112
113 rtsx_pci_write_register(pcr, FPDCTL,
114 SSC_POWER_DOWN, SSC_POWER_DOWN);
115 }
116
117 static int rts5228_enable_auto_blink(struct rtsx_pcr *pcr)
118 {
119 return rtsx_pci_write_register(pcr, OLT_LED_CTL,
120 LED_SHINE_MASK, LED_SHINE_EN);
121 }
122
123 static int rts5228_disable_auto_blink(struct rtsx_pcr *pcr)
124 {
125 return rtsx_pci_write_register(pcr, OLT_LED_CTL,
126 LED_SHINE_MASK, LED_SHINE_DISABLE);
127 }
128
129 static int rts5228_turn_on_led(struct rtsx_pcr *pcr)
130 {
131 return rtsx_pci_write_register(pcr, GPIO_CTL,
132 0x02, 0x02);
133 }
134
135 static int rts5228_turn_off_led(struct rtsx_pcr *pcr)
136 {
137 return rtsx_pci_write_register(pcr, GPIO_CTL,
138 0x02, 0x00);
139 }
140
141 /* SD Pull Control Enable:
142 * SD_DAT[3:0] ==> pull up
143 * SD_CD ==> pull up
144 * SD_WP ==> pull up
145 * SD_CMD ==> pull up
146 * SD_CLK ==> pull down
147 */
148 static const u32 rts5228_sd_pull_ctl_enable_tbl[] = {
149 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
150 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
151 0,
152 };
153
154 /* SD Pull Control Disable:
155 * SD_DAT[3:0] ==> pull down
156 * SD_CD ==> pull up
157 * SD_WP ==> pull down
158 * SD_CMD ==> pull down
159 * SD_CLK ==> pull down
160 */
161 static const u32 rts5228_sd_pull_ctl_disable_tbl[] = {
162 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
163 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
164 0,
165 };
166
167 static int rts5228_sd_set_sample_push_timing_sd30(struct rtsx_pcr *pcr)
168 {
169 rtsx_pci_write_register(pcr, SD_CFG1, SD_MODE_SELECT_MASK
170 | SD_ASYNC_FIFO_NOT_RST, SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
171 rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, CLK_LOW_FREQ);
172 rtsx_pci_write_register(pcr, CARD_CLK_SOURCE, 0xFF,
173 CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
174 rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
175
176 return 0;
177 }
178
179 static int rts5228_card_power_on(struct rtsx_pcr *pcr, int card)
180 {
181 struct rtsx_cr_option *option = &pcr->option;
182
183 if (option->ocp_en)
184 rtsx_pci_enable_ocp(pcr);
185
186 rtsx_pci_write_register(pcr, REG_CRC_DUMMY_0,
187 CFG_SD_POW_AUTO_PD, CFG_SD_POW_AUTO_PD);
188
189 rtsx_pci_write_register(pcr, RTS5228_LDO1_CFG1,
190 RTS5228_LDO1_TUNE_MASK, RTS5228_LDO1_33);
191
192 rtsx_pci_write_register(pcr, RTS5228_LDO1233318_POW_CTL,
193 RTS5228_LDO1_POWERON_MASK, RTS5228_LDO1_SOFTSTART);
194 mdelay(2);
195 rtsx_pci_write_register(pcr, RTS5228_LDO1233318_POW_CTL,
196 RTS5228_LDO1_POWERON_MASK, RTS5228_LDO1_FULLON);
197
198
199 rtsx_pci_write_register(pcr, RTS5228_LDO1233318_POW_CTL,
200 RTS5228_LDO3318_POWERON, RTS5228_LDO3318_POWERON);
201
202 msleep(20);
203
204 rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
205
206 /* Initialize SD_CFG1 register */
207 rtsx_pci_write_register(pcr, SD_CFG1, 0xFF,
208 SD_CLK_DIVIDE_128 | SD_20_MODE | SD_BUS_WIDTH_1BIT);
209
210 rtsx_pci_write_register(pcr, SD_SAMPLE_POINT_CTL,
211 0xFF, SD20_RX_POS_EDGE);
212 rtsx_pci_write_register(pcr, SD_PUSH_POINT_CTL, 0xFF, 0);
213 rtsx_pci_write_register(pcr, CARD_STOP, SD_STOP | SD_CLR_ERR,
214 SD_STOP | SD_CLR_ERR);
215
216 /* Reset SD_CFG3 register */
217 rtsx_pci_write_register(pcr, SD_CFG3, SD30_CLK_END_EN, 0);
218 rtsx_pci_write_register(pcr, REG_SD_STOP_SDCLK_CFG,
219 SD30_CLK_STOP_CFG_EN | SD30_CLK_STOP_CFG1 |
220 SD30_CLK_STOP_CFG0, 0);
221
222 if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50 ||
223 pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
224 rts5228_sd_set_sample_push_timing_sd30(pcr);
225
226 return 0;
227 }
228
229 static int rts5228_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
230 {
231 int err;
232 u16 val = 0;
233
234 rtsx_pci_write_register(pcr, RTS5228_CARD_PWR_CTL,
235 RTS5228_PUPDC, RTS5228_PUPDC);
236
237 switch (voltage) {
238 case OUTPUT_3V3:
239 rtsx_pci_read_phy_register(pcr, PHY_TUNE, &val);
240 val |= PHY_TUNE_SDBUS_33;
241 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, val);
242 if (err < 0)
243 return err;
244
245 rtsx_pci_write_register(pcr, RTS5228_DV3318_CFG,
246 RTS5228_DV3318_TUNE_MASK, RTS5228_DV3318_33);
247 rtsx_pci_write_register(pcr, SD_PAD_CTL,
248 SD_IO_USING_1V8, 0);
249 break;
250 case OUTPUT_1V8:
251 rtsx_pci_read_phy_register(pcr, PHY_TUNE, &val);
252 val &= ~PHY_TUNE_SDBUS_33;
253 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, val);
254 if (err < 0)
255 return err;
256
257 rtsx_pci_write_register(pcr, RTS5228_DV3318_CFG,
258 RTS5228_DV3318_TUNE_MASK, RTS5228_DV3318_18);
259 rtsx_pci_write_register(pcr, SD_PAD_CTL,
260 SD_IO_USING_1V8, SD_IO_USING_1V8);
261 break;
262 default:
263 return -EINVAL;
264 }
265
266 /* set pad drive */
267 rts5228_fill_driving(pcr, voltage);
268
269 return 0;
270 }
271
272 static void rts5228_stop_cmd(struct rtsx_pcr *pcr)
273 {
274 rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
275 rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
276 rtsx_pci_write_register(pcr, RTS5260_DMA_RST_CTL_0,
277 RTS5260_DMA_RST | RTS5260_ADMA3_RST,
278 RTS5260_DMA_RST | RTS5260_ADMA3_RST);
279 rtsx_pci_write_register(pcr, RBCTL, RB_FLUSH, RB_FLUSH);
280 }
281
282 static void rts5228_card_before_power_off(struct rtsx_pcr *pcr)
283 {
284 rts5228_stop_cmd(pcr);
285 rts5228_switch_output_voltage(pcr, OUTPUT_3V3);
286 }
287
288 static void rts5228_enable_ocp(struct rtsx_pcr *pcr)
289 {
290 u8 val = 0;
291
292 val = SD_OCP_INT_EN | SD_DETECT_EN;
293 rtsx_pci_write_register(pcr, REG_OCPCTL, 0xFF, val);
294 rtsx_pci_write_register(pcr, RTS5228_LDO1_CFG0,
295 RTS5228_LDO1_OCP_EN | RTS5228_LDO1_OCP_LMT_EN,
296 RTS5228_LDO1_OCP_EN | RTS5228_LDO1_OCP_LMT_EN);
297 }
298
299 static void rts5228_disable_ocp(struct rtsx_pcr *pcr)
300 {
301 u8 mask = 0;
302
303 mask = SD_OCP_INT_EN | SD_DETECT_EN;
304 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
305 rtsx_pci_write_register(pcr, RTS5228_LDO1_CFG0,
306 RTS5228_LDO1_OCP_EN | RTS5228_LDO1_OCP_LMT_EN, 0);
307 }
308
309 static int rts5228_card_power_off(struct rtsx_pcr *pcr, int card)
310 {
311 int err = 0;
312
313 rts5228_card_before_power_off(pcr);
314 err = rtsx_pci_write_register(pcr, RTS5228_LDO1233318_POW_CTL,
315 RTS5228_LDO_POWERON_MASK, 0);
316 rtsx_pci_write_register(pcr, REG_CRC_DUMMY_0, CFG_SD_POW_AUTO_PD, 0);
317
318 if (pcr->option.ocp_en)
319 rtsx_pci_disable_ocp(pcr);
320
321 return err;
322 }
323
324 static void rts5228_init_ocp(struct rtsx_pcr *pcr)
325 {
326 struct rtsx_cr_option *option = &pcr->option;
327
328 if (option->ocp_en) {
329 u8 mask, val;
330
331 rtsx_pci_write_register(pcr, RTS5228_LDO1_CFG0,
332 RTS5228_LDO1_OCP_EN | RTS5228_LDO1_OCP_LMT_EN,
333 RTS5228_LDO1_OCP_EN | RTS5228_LDO1_OCP_LMT_EN);
334
335 rtsx_pci_write_register(pcr, RTS5228_LDO1_CFG0,
336 RTS5228_LDO1_OCP_THD_MASK, option->sd_800mA_ocp_thd);
337
338 rtsx_pci_write_register(pcr, RTS5228_LDO1_CFG0,
339 RTS5228_LDO1_OCP_LMT_THD_MASK,
340 RTS5228_LDO1_LMT_THD_1500);
341
342 rtsx_pci_read_register(pcr, RTS5228_LDO1_CFG0, &val);
343
344 mask = SD_OCP_GLITCH_MASK;
345 val = pcr->hw_param.ocp_glitch;
346 rtsx_pci_write_register(pcr, REG_OCPGLITCH, mask, val);
347
348 rts5228_enable_ocp(pcr);
349
350 } else {
351 rtsx_pci_write_register(pcr, RTS5228_LDO1_CFG0,
352 RTS5228_LDO1_OCP_EN | RTS5228_LDO1_OCP_LMT_EN, 0);
353 }
354 }
355
356 static void rts5228_clear_ocpstat(struct rtsx_pcr *pcr)
357 {
358 u8 mask = 0;
359 u8 val = 0;
360
361 mask = SD_OCP_INT_CLR | SD_OC_CLR;
362 val = SD_OCP_INT_CLR | SD_OC_CLR;
363
364 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, val);
365
366 udelay(1000);
367 rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
368
369 }
370
371 static void rts5228_process_ocp(struct rtsx_pcr *pcr)
372 {
373 if (!pcr->option.ocp_en)
374 return;
375
376 rtsx_pci_get_ocpstat(pcr, &pcr->ocp_stat);
377
378 if (pcr->ocp_stat & (SD_OC_NOW | SD_OC_EVER)) {
379 rts5228_clear_ocpstat(pcr);
380 rts5228_card_power_off(pcr, RTSX_SD_CARD);
381 rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, 0);
382 pcr->ocp_stat = 0;
383 }
384
385 }
386
387 static void rts5228_init_from_cfg(struct rtsx_pcr *pcr)
388 {
389 struct pci_dev *pdev = pcr->pci;
390 int l1ss;
391 u32 lval;
392 struct rtsx_cr_option *option = &pcr->option;
393
394 l1ss = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_L1SS);
395 if (!l1ss)
396 return;
397
398 pci_read_config_dword(pdev, l1ss + PCI_L1SS_CTL1, &lval);
399
400 if (0 == (lval & 0x0F))
401 rtsx_pci_enable_oobs_polling(pcr);
402 else
403 rtsx_pci_disable_oobs_polling(pcr);
404
405 if (lval & PCI_L1SS_CTL1_ASPM_L1_1)
406 rtsx_set_dev_flag(pcr, ASPM_L1_1_EN);
407 else
408 rtsx_clear_dev_flag(pcr, ASPM_L1_1_EN);
409
410 if (lval & PCI_L1SS_CTL1_ASPM_L1_2)
411 rtsx_set_dev_flag(pcr, ASPM_L1_2_EN);
412 else
413 rtsx_clear_dev_flag(pcr, ASPM_L1_2_EN);
414
415 if (lval & PCI_L1SS_CTL1_PCIPM_L1_1)
416 rtsx_set_dev_flag(pcr, PM_L1_1_EN);
417 else
418 rtsx_clear_dev_flag(pcr, PM_L1_1_EN);
419
420 if (lval & PCI_L1SS_CTL1_PCIPM_L1_2)
421 rtsx_set_dev_flag(pcr, PM_L1_2_EN);
422 else
423 rtsx_clear_dev_flag(pcr, PM_L1_2_EN);
424
425 rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, 0xFF, 0);
426 if (option->ltr_en) {
427 u16 val;
428
429 pcie_capability_read_word(pcr->pci, PCI_EXP_DEVCTL2, &val);
430 if (val & PCI_EXP_DEVCTL2_LTR_EN) {
431 option->ltr_enabled = true;
432 option->ltr_active = true;
433 rtsx_set_ltr_latency(pcr, option->ltr_active_latency);
434 } else {
435 option->ltr_enabled = false;
436 }
437 }
438 }
439
440 static int rts5228_extra_init_hw(struct rtsx_pcr *pcr)
441 {
442
443 rtsx_pci_write_register(pcr, RTS5228_AUTOLOAD_CFG1,
444 CD_RESUME_EN_MASK, CD_RESUME_EN_MASK);
445
446 rts5228_init_from_cfg(pcr);
447
448 rtsx_pci_write_register(pcr, L1SUB_CONFIG1,
449 AUX_CLK_ACTIVE_SEL_MASK, MAC_CKSW_DONE);
450 rtsx_pci_write_register(pcr, L1SUB_CONFIG3, 0xFF, 0);
451
452 rtsx_pci_write_register(pcr, FUNC_FORCE_CTL,
453 FUNC_FORCE_UPME_XMT_DBG, FUNC_FORCE_UPME_XMT_DBG);
454
455 rtsx_pci_write_register(pcr, PCLK_CTL,
456 PCLK_MODE_SEL, PCLK_MODE_SEL);
457
458 rtsx_pci_write_register(pcr, PM_EVENT_DEBUG, PME_DEBUG_0, PME_DEBUG_0);
459 rtsx_pci_write_register(pcr, PM_CLK_FORCE_CTL, CLK_PM_EN, CLK_PM_EN);
460
461 /* LED shine disabled, set initial shine cycle period */
462 rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x0F, 0x02);
463
464 /* Configure driving */
465 rts5228_fill_driving(pcr, OUTPUT_3V3);
466
467 if (pcr->flags & PCR_REVERSE_SOCKET)
468 rtsx_pci_write_register(pcr, PETXCFG, 0x30, 0x30);
469 else
470 rtsx_pci_write_register(pcr, PETXCFG, 0x30, 0x00);
471
472 rtsx_pci_write_register(pcr, PWD_SUSPEND_EN, 0xFF, 0xFB);
473
474 if (pcr->rtd3_en) {
475 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x01);
476 rtsx_pci_write_register(pcr, RTS5228_REG_PME_FORCE_CTL,
477 FORCE_PM_CONTROL | FORCE_PM_VALUE,
478 FORCE_PM_CONTROL | FORCE_PM_VALUE);
479 } else {
480 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
481 rtsx_pci_write_register(pcr, RTS5228_REG_PME_FORCE_CTL,
482 FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
483 }
484 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, D3_DELINK_MODE_EN, 0x00);
485
486 return 0;
487 }
488
489 static void rts5228_enable_aspm(struct rtsx_pcr *pcr, bool enable)
490 {
491 u8 mask, val;
492
493 if (pcr->aspm_enabled == enable)
494 return;
495
496 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
497 val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
498 val |= (pcr->aspm_en & 0x02);
499 rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
500 pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
501 PCI_EXP_LNKCTL_ASPMC, pcr->aspm_en);
502 pcr->aspm_enabled = enable;
503 }
504
505 static void rts5228_disable_aspm(struct rtsx_pcr *pcr, bool enable)
506 {
507 u8 mask, val;
508
509 if (pcr->aspm_enabled == enable)
510 return;
511
512 pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
513 PCI_EXP_LNKCTL_ASPMC, 0);
514 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
515 val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
516 rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
517 rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
518 mdelay(10);
519 pcr->aspm_enabled = enable;
520 }
521
522 static void rts5228_set_aspm(struct rtsx_pcr *pcr, bool enable)
523 {
524 if (enable)
525 rts5228_enable_aspm(pcr, true);
526 else
527 rts5228_disable_aspm(pcr, false);
528 }
529
530 static void rts5228_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
531 {
532 struct rtsx_cr_option *option = &pcr->option;
533 int aspm_L1_1, aspm_L1_2;
534 u8 val = 0;
535
536 aspm_L1_1 = rtsx_check_dev_flag(pcr, ASPM_L1_1_EN);
537 aspm_L1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN);
538
539 if (active) {
540 /* run, latency: 60us */
541 if (aspm_L1_1)
542 val = option->ltr_l1off_snooze_sspwrgate;
543 } else {
544 /* l1off, latency: 300us */
545 if (aspm_L1_2)
546 val = option->ltr_l1off_sspwrgate;
547 }
548
549 rtsx_set_l1off_sub(pcr, val);
550 }
551
552 static const struct pcr_ops rts5228_pcr_ops = {
553 .fetch_vendor_settings = rtsx5228_fetch_vendor_settings,
554 .turn_on_led = rts5228_turn_on_led,
555 .turn_off_led = rts5228_turn_off_led,
556 .extra_init_hw = rts5228_extra_init_hw,
557 .enable_auto_blink = rts5228_enable_auto_blink,
558 .disable_auto_blink = rts5228_disable_auto_blink,
559 .card_power_on = rts5228_card_power_on,
560 .card_power_off = rts5228_card_power_off,
561 .switch_output_voltage = rts5228_switch_output_voltage,
562 .force_power_down = rts5228_force_power_down,
563 .stop_cmd = rts5228_stop_cmd,
564 .set_aspm = rts5228_set_aspm,
565 .set_l1off_cfg_sub_d0 = rts5228_set_l1off_cfg_sub_d0,
566 .enable_ocp = rts5228_enable_ocp,
567 .disable_ocp = rts5228_disable_ocp,
568 .init_ocp = rts5228_init_ocp,
569 .process_ocp = rts5228_process_ocp,
570 .clear_ocpstat = rts5228_clear_ocpstat,
571 .optimize_phy = rts5228_optimize_phy,
572 };
573
574
575 static inline u8 double_ssc_depth(u8 depth)
576 {
577 return ((depth > 1) ? (depth - 1) : depth);
578 }
579
580 int rts5228_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
581 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
582 {
583 int err, clk;
584 u16 n;
585 u8 clk_divider, mcu_cnt, div;
586 static const u8 depth[] = {
587 [RTSX_SSC_DEPTH_4M] = RTS5228_SSC_DEPTH_4M,
588 [RTSX_SSC_DEPTH_2M] = RTS5228_SSC_DEPTH_2M,
589 [RTSX_SSC_DEPTH_1M] = RTS5228_SSC_DEPTH_1M,
590 [RTSX_SSC_DEPTH_500K] = RTS5228_SSC_DEPTH_512K,
591 };
592
593 if (initial_mode) {
594 /* We use 250k(around) here, in initial stage */
595 clk_divider = SD_CLK_DIVIDE_128;
596 card_clock = 30000000;
597 } else {
598 clk_divider = SD_CLK_DIVIDE_0;
599 }
600 err = rtsx_pci_write_register(pcr, SD_CFG1,
601 SD_CLK_DIVIDE_MASK, clk_divider);
602 if (err < 0)
603 return err;
604
605 card_clock /= 1000000;
606 pcr_dbg(pcr, "Switch card clock to %dMHz\n", card_clock);
607
608 clk = card_clock;
609 if (!initial_mode && double_clk)
610 clk = card_clock * 2;
611 pcr_dbg(pcr, "Internal SSC clock: %dMHz (cur_clock = %d)\n",
612 clk, pcr->cur_clock);
613
614 if (clk == pcr->cur_clock)
615 return 0;
616
617 if (pcr->ops->conv_clk_and_div_n)
618 n = pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
619 else
620 n = clk - 4;
621 if ((clk <= 4) || (n > 396))
622 return -EINVAL;
623
624 mcu_cnt = 125/clk + 3;
625 if (mcu_cnt > 15)
626 mcu_cnt = 15;
627
628 div = CLK_DIV_1;
629 while ((n < MIN_DIV_N_PCR - 4) && (div < CLK_DIV_8)) {
630 if (pcr->ops->conv_clk_and_div_n) {
631 int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
632 DIV_N_TO_CLK) * 2;
633 n = pcr->ops->conv_clk_and_div_n(dbl_clk,
634 CLK_TO_DIV_N);
635 } else {
636 n = (n + 4) * 2 - 4;
637 }
638 div++;
639 }
640
641 n = (n / 2) - 1;
642 pcr_dbg(pcr, "n = %d, div = %d\n", n, div);
643
644 ssc_depth = depth[ssc_depth];
645 if (double_clk)
646 ssc_depth = double_ssc_depth(ssc_depth);
647
648 if (ssc_depth) {
649 if (div == CLK_DIV_2) {
650 if (ssc_depth > 1)
651 ssc_depth -= 1;
652 else
653 ssc_depth = RTS5228_SSC_DEPTH_8M;
654 } else if (div == CLK_DIV_4) {
655 if (ssc_depth > 2)
656 ssc_depth -= 2;
657 else
658 ssc_depth = RTS5228_SSC_DEPTH_8M;
659 } else if (div == CLK_DIV_8) {
660 if (ssc_depth > 3)
661 ssc_depth -= 3;
662 else
663 ssc_depth = RTS5228_SSC_DEPTH_8M;
664 }
665 } else {
666 ssc_depth = 0;
667 }
668 pcr_dbg(pcr, "ssc_depth = %d\n", ssc_depth);
669
670 rtsx_pci_init_cmd(pcr);
671 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
672 CLK_LOW_FREQ, CLK_LOW_FREQ);
673 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
674 0xFF, (div << 4) | mcu_cnt);
675 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
676 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
677 SSC_DEPTH_MASK, ssc_depth);
678 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
679 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
680 if (vpclk) {
681 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
682 PHASE_NOT_RESET, 0);
683 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK1_CTL,
684 PHASE_NOT_RESET, 0);
685 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
686 PHASE_NOT_RESET, PHASE_NOT_RESET);
687 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK1_CTL,
688 PHASE_NOT_RESET, PHASE_NOT_RESET);
689 }
690
691 err = rtsx_pci_send_cmd(pcr, 2000);
692 if (err < 0)
693 return err;
694
695 /* Wait SSC clock stable */
696 udelay(SSC_CLOCK_STABLE_WAIT);
697 err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
698 if (err < 0)
699 return err;
700
701 pcr->cur_clock = clk;
702 return 0;
703
704 }
705
706 void rts5228_init_params(struct rtsx_pcr *pcr)
707 {
708 struct rtsx_cr_option *option = &pcr->option;
709 struct rtsx_hw_param *hw_param = &pcr->hw_param;
710
711 pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
712 pcr->num_slots = 1;
713 pcr->ops = &rts5228_pcr_ops;
714
715 pcr->flags = 0;
716 pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
717 pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
718 pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
719 pcr->aspm_en = ASPM_L1_EN;
720 pcr->aspm_mode = ASPM_MODE_REG;
721 pcr->tx_initial_phase = SET_CLOCK_PHASE(28, 27, 11);
722 pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
723
724 pcr->ic_version = rts5228_get_ic_version(pcr);
725 pcr->sd_pull_ctl_enable_tbl = rts5228_sd_pull_ctl_enable_tbl;
726 pcr->sd_pull_ctl_disable_tbl = rts5228_sd_pull_ctl_disable_tbl;
727
728 pcr->reg_pm_ctrl3 = RTS5228_AUTOLOAD_CFG3;
729
730 option->dev_flags = (LTR_L1SS_PWR_GATE_CHECK_CARD_EN
731 | LTR_L1SS_PWR_GATE_EN);
732 option->ltr_en = true;
733
734 /* init latency of active, idle, L1OFF to 60us, 300us, 3ms */
735 option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
736 option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
737 option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
738 option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
739 option->ltr_l1off_sspwrgate = 0x7F;
740 option->ltr_l1off_snooze_sspwrgate = 0x78;
741
742 option->ocp_en = 1;
743 hw_param->interrupt_en |= SD_OC_INT_EN;
744 hw_param->ocp_glitch = SD_OCP_GLITCH_800U;
745 option->sd_800mA_ocp_thd = RTS5228_LDO1_OCP_THD_930;
746 }
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