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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 BayHub Technology Ltd.
4 *
5 * Authors: Peter Guo <peter.guo@bayhubtech.com>
6 * Adam Lee <adam.lee@canonical.com>
7 * Ernest Zhang <ernest.zhang@bayhubtech.com>
8 */
9
10#include <linux/pci.h>
11#include <linux/mmc/host.h>
12#include <linux/mmc/mmc.h>
13#include <linux/delay.h>
14#include <linux/iopoll.h>
15#include <linux/bitfield.h>
16
17#include "sdhci.h"
18#include "sdhci-pci.h"
19
20/*
21 * O2Micro device registers
22 */
23
24#define O2_SD_PCIE_SWITCH 0x54
25#define O2_SD_MISC_REG5 0x64
26#define O2_SD_LD0_CTRL 0x68
27#define O2_SD_DEV_CTRL 0x88
28#define O2_SD_LOCK_WP 0xD3
29#define O2_SD_TEST_REG 0xD4
30#define O2_SD_FUNC_REG0 0xDC
31#define O2_SD_MULTI_VCC3V 0xEE
32#define O2_SD_CLKREQ 0xEC
33#define O2_SD_CAPS 0xE0
34#define O2_SD_ADMA1 0xE2
35#define O2_SD_ADMA2 0xE7
36#define O2_SD_MISC_CTRL2 0xF0
37#define O2_SD_INF_MOD 0xF1
38#define O2_SD_MISC_CTRL4 0xFC
39#define O2_SD_MISC_CTRL 0x1C0
40#define O2_SD_EXP_INT_REG 0x1E0
41#define O2_SD_PWR_FORCE_L0 0x0002
42#define O2_SD_TUNING_CTRL 0x300
43#define O2_SD_PLL_SETTING 0x304
44#define O2_SD_MISC_SETTING 0x308
45#define O2_SD_CLK_SETTING 0x328
46#define O2_SD_CAP_REG2 0x330
47#define O2_SD_CAP_REG0 0x334
48#define O2_SD_UHS1_CAP_SETTING 0x33C
49#define O2_SD_DELAY_CTRL 0x350
50#define O2_SD_OUTPUT_CLK_SOURCE_SWITCH 0x354
51#define O2_SD_UHS2_L1_CTRL 0x35C
52#define O2_SD_FUNC_REG3 0x3E0
53#define O2_SD_FUNC_REG4 0x3E4
54#define O2_SD_PARA_SET_REG1 0x444
55#define O2_SD_VDDX_CTRL_REG 0x508
56#define O2_SD_GPIO_CTRL_REG1 0x510
57#define O2_SD_LED_ENABLE BIT(6)
58#define O2_SD_FREG0_LEDOFF BIT(13)
59#define O2_SD_SEL_DLL BIT(16)
60#define O2_SD_FREG4_ENABLE_CLK_SET BIT(22)
61#define O2_SD_PHASE_MASK GENMASK(23, 20)
62#define O2_SD_FIX_PHASE FIELD_PREP(O2_SD_PHASE_MASK, 0x9)
63
64#define O2_SD_VENDOR_SETTING 0x110
65#define O2_SD_VENDOR_SETTING2 0x1C8
66#define O2_SD_HW_TUNING_DISABLE BIT(4)
67
68#define O2_PLL_DLL_WDT_CONTROL1 0x1CC
69#define O2_PLL_FORCE_ACTIVE BIT(18)
70#define O2_PLL_LOCK_STATUS BIT(14)
71#define O2_PLL_SOFT_RESET BIT(12)
72#define O2_DLL_LOCK_STATUS BIT(11)
73
74#define O2_SD_DETECT_SETTING 0x324
75
76static const u32 dmdn_table[] = {0x2B1C0000,
77 0x2C1A0000, 0x371B0000, 0x35100000};
78#define DMDN_SZ ARRAY_SIZE(dmdn_table)
79
80struct o2_host {
81 u8 dll_adjust_count;
82};
83
84static void sdhci_o2_wait_card_detect_stable(struct sdhci_host *host)
85{
86 ktime_t timeout;
87 u32 scratch32;
88
89 /* Wait max 50 ms */
90 timeout = ktime_add_ms(ktime_get(), 50);
91 while (1) {
92 bool timedout = ktime_after(ktime_get(), timeout);
93
94 scratch32 = sdhci_readl(host, SDHCI_PRESENT_STATE);
95 if ((scratch32 & SDHCI_CARD_PRESENT) >> SDHCI_CARD_PRES_SHIFT
96 == (scratch32 & SDHCI_CD_LVL) >> SDHCI_CD_LVL_SHIFT)
97 break;
98
99 if (timedout) {
100 pr_err("%s: Card Detect debounce never finished.\n",
101 mmc_hostname(host->mmc));
102 sdhci_dumpregs(host);
103 return;
104 }
105 udelay(10);
106 }
107}
108
109static void sdhci_o2_enable_internal_clock(struct sdhci_host *host)
110{
111 ktime_t timeout;
112 u16 scratch;
113 u32 scratch32;
114
115 /* PLL software reset */
116 scratch32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
117 scratch32 |= O2_PLL_SOFT_RESET;
118 sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
119 udelay(1);
120 scratch32 &= ~(O2_PLL_SOFT_RESET);
121 sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
122
123 /* PLL force active */
124 scratch32 |= O2_PLL_FORCE_ACTIVE;
125 sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
126
127 /* Wait max 20 ms */
128 timeout = ktime_add_ms(ktime_get(), 20);
129 while (1) {
130 bool timedout = ktime_after(ktime_get(), timeout);
131
132 scratch = sdhci_readw(host, O2_PLL_DLL_WDT_CONTROL1);
133 if (scratch & O2_PLL_LOCK_STATUS)
134 break;
135 if (timedout) {
136 pr_err("%s: Internal clock never stabilised.\n",
137 mmc_hostname(host->mmc));
138 sdhci_dumpregs(host);
139 goto out;
140 }
141 udelay(10);
142 }
143
144 /* Wait for card detect finish */
145 udelay(1);
146 sdhci_o2_wait_card_detect_stable(host);
147
148out:
149 /* Cancel PLL force active */
150 scratch32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
151 scratch32 &= ~O2_PLL_FORCE_ACTIVE;
152 sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
153}
154
155static int sdhci_o2_get_cd(struct mmc_host *mmc)
156{
157 struct sdhci_host *host = mmc_priv(mmc);
158
159 if (!(sdhci_readw(host, O2_PLL_DLL_WDT_CONTROL1) & O2_PLL_LOCK_STATUS))
160 sdhci_o2_enable_internal_clock(host);
161 else
162 sdhci_o2_wait_card_detect_stable(host);
163
164 return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
165}
166
167static void o2_pci_set_baseclk(struct sdhci_pci_chip *chip, u32 value)
168{
169 u32 scratch_32;
170
171 pci_read_config_dword(chip->pdev,
172 O2_SD_PLL_SETTING, &scratch_32);
173
174 scratch_32 &= 0x0000FFFF;
175 scratch_32 |= value;
176
177 pci_write_config_dword(chip->pdev,
178 O2_SD_PLL_SETTING, scratch_32);
179}
180
181static u32 sdhci_o2_pll_dll_wdt_control(struct sdhci_host *host)
182{
183 return sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
184}
185
186/*
187 * This function is used to detect dll lock status.
188 * Since the dll lock status bit will toggle randomly
189 * with very short interval which needs to be polled
190 * as fast as possible. Set sleep_us as 1 microsecond.
191 */
192static int sdhci_o2_wait_dll_detect_lock(struct sdhci_host *host)
193{
194 u32 scratch32 = 0;
195
196 return readx_poll_timeout(sdhci_o2_pll_dll_wdt_control, host,
197 scratch32, !(scratch32 & O2_DLL_LOCK_STATUS), 1, 1000000);
198}
199
200static void sdhci_o2_set_tuning_mode(struct sdhci_host *host)
201{
202 u16 reg;
203
204 /* enable hardware tuning */
205 reg = sdhci_readw(host, O2_SD_VENDOR_SETTING);
206 reg &= ~O2_SD_HW_TUNING_DISABLE;
207 sdhci_writew(host, reg, O2_SD_VENDOR_SETTING);
208}
209
210static void __sdhci_o2_execute_tuning(struct sdhci_host *host, u32 opcode)
211{
212 int i;
213
214 sdhci_send_tuning(host, opcode);
215
216 for (i = 0; i < 150; i++) {
217 u16 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
218
219 if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) {
220 if (ctrl & SDHCI_CTRL_TUNED_CLK) {
221 host->tuning_done = true;
222 return;
223 }
224 pr_warn("%s: HW tuning failed !\n",
225 mmc_hostname(host->mmc));
226 break;
227 }
228
229 mdelay(1);
230 }
231
232 pr_info("%s: Tuning failed, falling back to fixed sampling clock\n",
233 mmc_hostname(host->mmc));
234 sdhci_reset_tuning(host);
235}
236
237/*
238 * This function is used to fix o2 dll shift issue.
239 * It isn't necessary to detect card present before recovery.
240 * Firstly, it is used by bht emmc card, which is embedded.
241 * Second, before call recovery card present will be detected
242 * outside of the execute tuning function.
243 */
244static int sdhci_o2_dll_recovery(struct sdhci_host *host)
245{
246 int ret = 0;
247 u8 scratch_8 = 0;
248 u32 scratch_32 = 0;
249 struct sdhci_pci_slot *slot = sdhci_priv(host);
250 struct sdhci_pci_chip *chip = slot->chip;
251 struct o2_host *o2_host = sdhci_pci_priv(slot);
252
253 /* UnLock WP */
254 pci_read_config_byte(chip->pdev,
255 O2_SD_LOCK_WP, &scratch_8);
256 scratch_8 &= 0x7f;
257 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8);
258 while (o2_host->dll_adjust_count < DMDN_SZ && !ret) {
259 /* Disable clock */
260 sdhci_writeb(host, 0, SDHCI_CLOCK_CONTROL);
261
262 /* PLL software reset */
263 scratch_32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
264 scratch_32 |= O2_PLL_SOFT_RESET;
265 sdhci_writel(host, scratch_32, O2_PLL_DLL_WDT_CONTROL1);
266
267 pci_read_config_dword(chip->pdev,
268 O2_SD_FUNC_REG4,
269 &scratch_32);
270 /* Enable Base Clk setting change */
271 scratch_32 |= O2_SD_FREG4_ENABLE_CLK_SET;
272 pci_write_config_dword(chip->pdev, O2_SD_FUNC_REG4, scratch_32);
273 o2_pci_set_baseclk(chip, dmdn_table[o2_host->dll_adjust_count]);
274
275 /* Enable internal clock */
276 scratch_8 = SDHCI_CLOCK_INT_EN;
277 sdhci_writeb(host, scratch_8, SDHCI_CLOCK_CONTROL);
278
279 if (sdhci_o2_get_cd(host->mmc)) {
280 /*
281 * need wait at least 5ms for dll status stable,
282 * after enable internal clock
283 */
284 usleep_range(5000, 6000);
285 if (sdhci_o2_wait_dll_detect_lock(host)) {
286 scratch_8 |= SDHCI_CLOCK_CARD_EN;
287 sdhci_writeb(host, scratch_8,
288 SDHCI_CLOCK_CONTROL);
289 ret = 1;
290 } else {
291 pr_warn("%s: DLL unlocked when dll_adjust_count is %d.\n",
292 mmc_hostname(host->mmc),
293 o2_host->dll_adjust_count);
294 }
295 } else {
296 pr_err("%s: card present detect failed.\n",
297 mmc_hostname(host->mmc));
298 break;
299 }
300
301 o2_host->dll_adjust_count++;
302 }
303 if (!ret && o2_host->dll_adjust_count == DMDN_SZ)
304 pr_err("%s: DLL adjust over max times\n",
305 mmc_hostname(host->mmc));
306 /* Lock WP */
307 pci_read_config_byte(chip->pdev,
308 O2_SD_LOCK_WP, &scratch_8);
309 scratch_8 |= 0x80;
310 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8);
311 return ret;
312}
313
314static int sdhci_o2_execute_tuning(struct mmc_host *mmc, u32 opcode)
315{
316 struct sdhci_host *host = mmc_priv(mmc);
317 struct sdhci_pci_slot *slot = sdhci_priv(host);
318 struct sdhci_pci_chip *chip = slot->chip;
319 int current_bus_width = 0;
320 u32 scratch32 = 0;
321 u16 scratch = 0;
322 u8 scratch_8 = 0;
323 u32 reg_val;
324
325 /*
326 * This handler implements the hardware tuning that is specific to
327 * this controller. Fall back to the standard method for other TIMING.
328 */
329 if ((host->timing != MMC_TIMING_MMC_HS200) &&
330 (host->timing != MMC_TIMING_UHS_SDR104) &&
331 (host->timing != MMC_TIMING_UHS_SDR50))
332 return sdhci_execute_tuning(mmc, opcode);
333
334 if (WARN_ON(!mmc_op_tuning(opcode)))
335 return -EINVAL;
336
337 /* Force power mode enter L0 */
338 scratch = sdhci_readw(host, O2_SD_MISC_CTRL);
339 scratch |= O2_SD_PWR_FORCE_L0;
340 sdhci_writew(host, scratch, O2_SD_MISC_CTRL);
341
342 /* Update output phase */
343 switch (chip->pdev->device) {
344 case PCI_DEVICE_ID_O2_SDS0:
345 case PCI_DEVICE_ID_O2_SEABIRD0:
346 case PCI_DEVICE_ID_O2_SEABIRD1:
347 case PCI_DEVICE_ID_O2_SDS1:
348 case PCI_DEVICE_ID_O2_FUJIN2:
349 /* Stop clk */
350 reg_val = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
351 reg_val &= ~SDHCI_CLOCK_CARD_EN;
352 sdhci_writew(host, reg_val, SDHCI_CLOCK_CONTROL);
353
354 if (host->timing == MMC_TIMING_MMC_HS200 ||
355 host->timing == MMC_TIMING_UHS_SDR104) {
356 /* UnLock WP */
357 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch_8);
358 scratch_8 &= 0x7f;
359 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8);
360
361 /* Set pcr 0x354[16] to choose dll clock, and set the default phase */
362 pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, ®_val);
363 reg_val &= ~(O2_SD_SEL_DLL | O2_SD_PHASE_MASK);
364 reg_val |= (O2_SD_SEL_DLL | O2_SD_FIX_PHASE);
365 pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, reg_val);
366
367 /* Lock WP */
368 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch_8);
369 scratch_8 |= 0x80;
370 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8);
371 }
372
373 /* Start clk */
374 reg_val = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
375 reg_val |= SDHCI_CLOCK_CARD_EN;
376 sdhci_writew(host, reg_val, SDHCI_CLOCK_CONTROL);
377 break;
378 default:
379 break;
380 }
381
382 /* wait DLL lock, timeout value 5ms */
383 if (readx_poll_timeout(sdhci_o2_pll_dll_wdt_control, host,
384 scratch32, (scratch32 & O2_DLL_LOCK_STATUS), 1, 5000))
385 pr_warn("%s: DLL can't lock in 5ms after force L0 during tuning.\n",
386 mmc_hostname(host->mmc));
387 /*
388 * Judge the tuning reason, whether caused by dll shift
389 * If cause by dll shift, should call sdhci_o2_dll_recovery
390 */
391 if (!sdhci_o2_wait_dll_detect_lock(host))
392 if (!sdhci_o2_dll_recovery(host)) {
393 pr_err("%s: o2 dll recovery failed\n",
394 mmc_hostname(host->mmc));
395 return -EINVAL;
396 }
397 /*
398 * o2 sdhci host didn't support 8bit emmc tuning
399 */
400 if (mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
401 current_bus_width = mmc->ios.bus_width;
402 mmc->ios.bus_width = MMC_BUS_WIDTH_4;
403 sdhci_set_bus_width(host, MMC_BUS_WIDTH_4);
404 }
405
406 sdhci_o2_set_tuning_mode(host);
407
408 sdhci_start_tuning(host);
409
410 __sdhci_o2_execute_tuning(host, opcode);
411
412 sdhci_end_tuning(host);
413
414 if (current_bus_width == MMC_BUS_WIDTH_8) {
415 mmc->ios.bus_width = MMC_BUS_WIDTH_8;
416 sdhci_set_bus_width(host, current_bus_width);
417 }
418
419 /* Cancel force power mode enter L0 */
420 scratch = sdhci_readw(host, O2_SD_MISC_CTRL);
421 scratch &= ~(O2_SD_PWR_FORCE_L0);
422 sdhci_writew(host, scratch, O2_SD_MISC_CTRL);
423
424 sdhci_reset(host, SDHCI_RESET_CMD);
425 sdhci_reset(host, SDHCI_RESET_DATA);
426
427 host->flags &= ~SDHCI_HS400_TUNING;
428 return 0;
429}
430
431static void o2_pci_led_enable(struct sdhci_pci_chip *chip)
432{
433 int ret;
434 u32 scratch_32;
435
436 /* Set led of SD host function enable */
437 ret = pci_read_config_dword(chip->pdev,
438 O2_SD_FUNC_REG0, &scratch_32);
439 if (ret)
440 return;
441
442 scratch_32 &= ~O2_SD_FREG0_LEDOFF;
443 pci_write_config_dword(chip->pdev,
444 O2_SD_FUNC_REG0, scratch_32);
445
446 ret = pci_read_config_dword(chip->pdev,
447 O2_SD_TEST_REG, &scratch_32);
448 if (ret)
449 return;
450
451 scratch_32 |= O2_SD_LED_ENABLE;
452 pci_write_config_dword(chip->pdev,
453 O2_SD_TEST_REG, scratch_32);
454}
455
456static void sdhci_pci_o2_fujin2_pci_init(struct sdhci_pci_chip *chip)
457{
458 u32 scratch_32;
459 int ret;
460 /* Improve write performance for SD3.0 */
461 ret = pci_read_config_dword(chip->pdev, O2_SD_DEV_CTRL, &scratch_32);
462 if (ret)
463 return;
464 scratch_32 &= ~((1 << 12) | (1 << 13) | (1 << 14));
465 pci_write_config_dword(chip->pdev, O2_SD_DEV_CTRL, scratch_32);
466
467 /* Enable Link abnormal reset generating Reset */
468 ret = pci_read_config_dword(chip->pdev, O2_SD_MISC_REG5, &scratch_32);
469 if (ret)
470 return;
471 scratch_32 &= ~((1 << 19) | (1 << 11));
472 scratch_32 |= (1 << 10);
473 pci_write_config_dword(chip->pdev, O2_SD_MISC_REG5, scratch_32);
474
475 /* set card power over current protection */
476 ret = pci_read_config_dword(chip->pdev, O2_SD_TEST_REG, &scratch_32);
477 if (ret)
478 return;
479 scratch_32 |= (1 << 4);
480 pci_write_config_dword(chip->pdev, O2_SD_TEST_REG, scratch_32);
481
482 /* adjust the output delay for SD mode */
483 pci_write_config_dword(chip->pdev, O2_SD_DELAY_CTRL, 0x00002492);
484
485 /* Set the output voltage setting of Aux 1.2v LDO */
486 ret = pci_read_config_dword(chip->pdev, O2_SD_LD0_CTRL, &scratch_32);
487 if (ret)
488 return;
489 scratch_32 &= ~(3 << 12);
490 pci_write_config_dword(chip->pdev, O2_SD_LD0_CTRL, scratch_32);
491
492 /* Set Max power supply capability of SD host */
493 ret = pci_read_config_dword(chip->pdev, O2_SD_CAP_REG0, &scratch_32);
494 if (ret)
495 return;
496 scratch_32 &= ~(0x01FE);
497 scratch_32 |= 0x00CC;
498 pci_write_config_dword(chip->pdev, O2_SD_CAP_REG0, scratch_32);
499 /* Set DLL Tuning Window */
500 ret = pci_read_config_dword(chip->pdev,
501 O2_SD_TUNING_CTRL, &scratch_32);
502 if (ret)
503 return;
504 scratch_32 &= ~(0x000000FF);
505 scratch_32 |= 0x00000066;
506 pci_write_config_dword(chip->pdev, O2_SD_TUNING_CTRL, scratch_32);
507
508 /* Set UHS2 T_EIDLE */
509 ret = pci_read_config_dword(chip->pdev,
510 O2_SD_UHS2_L1_CTRL, &scratch_32);
511 if (ret)
512 return;
513 scratch_32 &= ~(0x000000FC);
514 scratch_32 |= 0x00000084;
515 pci_write_config_dword(chip->pdev, O2_SD_UHS2_L1_CTRL, scratch_32);
516
517 /* Set UHS2 Termination */
518 ret = pci_read_config_dword(chip->pdev, O2_SD_FUNC_REG3, &scratch_32);
519 if (ret)
520 return;
521 scratch_32 &= ~((1 << 21) | (1 << 30));
522
523 pci_write_config_dword(chip->pdev, O2_SD_FUNC_REG3, scratch_32);
524
525 /* Set L1 Entrance Timer */
526 ret = pci_read_config_dword(chip->pdev, O2_SD_CAPS, &scratch_32);
527 if (ret)
528 return;
529 scratch_32 &= ~(0xf0000000);
530 scratch_32 |= 0x30000000;
531 pci_write_config_dword(chip->pdev, O2_SD_CAPS, scratch_32);
532
533 ret = pci_read_config_dword(chip->pdev,
534 O2_SD_MISC_CTRL4, &scratch_32);
535 if (ret)
536 return;
537 scratch_32 &= ~(0x000f0000);
538 scratch_32 |= 0x00080000;
539 pci_write_config_dword(chip->pdev, O2_SD_MISC_CTRL4, scratch_32);
540}
541
542static void sdhci_pci_o2_enable_msi(struct sdhci_pci_chip *chip,
543 struct sdhci_host *host)
544{
545 int ret;
546
547 ret = pci_find_capability(chip->pdev, PCI_CAP_ID_MSI);
548 if (!ret) {
549 pr_info("%s: unsupported MSI, use INTx irq\n",
550 mmc_hostname(host->mmc));
551 return;
552 }
553
554 ret = pci_alloc_irq_vectors(chip->pdev, 1, 1,
555 PCI_IRQ_MSI | PCI_IRQ_MSIX);
556 if (ret < 0) {
557 pr_err("%s: enable PCI MSI failed, err=%d\n",
558 mmc_hostname(host->mmc), ret);
559 return;
560 }
561
562 host->irq = pci_irq_vector(chip->pdev, 0);
563}
564
565static void sdhci_o2_enable_clk(struct sdhci_host *host, u16 clk)
566{
567 /* Enable internal clock */
568 clk |= SDHCI_CLOCK_INT_EN;
569 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
570
571 sdhci_o2_enable_internal_clock(host);
572 if (sdhci_o2_get_cd(host->mmc)) {
573 clk |= SDHCI_CLOCK_CARD_EN;
574 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
575 }
576}
577
578static void sdhci_pci_o2_set_clock(struct sdhci_host *host, unsigned int clock)
579{
580 u16 clk;
581 u8 scratch;
582 u32 scratch_32;
583 u32 dmdn_208m, dmdn_200m;
584 struct sdhci_pci_slot *slot = sdhci_priv(host);
585 struct sdhci_pci_chip *chip = slot->chip;
586
587 host->mmc->actual_clock = 0;
588
589 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
590
591 if (clock == 0)
592 return;
593
594 /* UnLock WP */
595 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
596 scratch &= 0x7f;
597 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
598
599 if (chip->pdev->device == PCI_DEVICE_ID_O2_GG8_9860 ||
600 chip->pdev->device == PCI_DEVICE_ID_O2_GG8_9861 ||
601 chip->pdev->device == PCI_DEVICE_ID_O2_GG8_9862 ||
602 chip->pdev->device == PCI_DEVICE_ID_O2_GG8_9863) {
603 dmdn_208m = 0x2c500000;
604 dmdn_200m = 0x25200000;
605 } else {
606 dmdn_208m = 0x2c280000;
607 dmdn_200m = 0x25100000;
608 }
609
610 if ((host->timing == MMC_TIMING_UHS_SDR104) && (clock == 200000000)) {
611 pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32);
612
613 if ((scratch_32 & 0xFFFF0000) != dmdn_208m)
614 o2_pci_set_baseclk(chip, dmdn_208m);
615 } else {
616 pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32);
617
618 if ((scratch_32 & 0xFFFF0000) != dmdn_200m)
619 o2_pci_set_baseclk(chip, dmdn_200m);
620 }
621
622 pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, &scratch_32);
623 scratch_32 &= ~(O2_SD_SEL_DLL | O2_SD_PHASE_MASK);
624 pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, scratch_32);
625
626 /* Lock WP */
627 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
628 scratch |= 0x80;
629 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
630
631 clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
632 sdhci_o2_enable_clk(host, clk);
633}
634
635static int sdhci_pci_o2_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
636{
637 struct sdhci_host *host = mmc_priv(mmc);
638 struct sdhci_pci_slot *slot = sdhci_priv(host);
639 struct sdhci_pci_chip *chip = slot->chip;
640 u8 scratch8;
641 u16 scratch16;
642 int ret;
643
644 /* Disable clock */
645 sdhci_writeb(host, 0, SDHCI_CLOCK_CONTROL);
646
647 /* Set VDD2 voltage*/
648 scratch8 = sdhci_readb(host, SDHCI_POWER_CONTROL);
649 scratch8 &= 0x0F;
650 if (host->mmc->ios.timing == MMC_TIMING_SD_EXP_1_2V &&
651 host->mmc->caps2 & MMC_CAP2_SD_EXP_1_2V) {
652 scratch8 |= SDHCI_VDD2_POWER_ON | SDHCI_VDD2_POWER_120;
653 } else {
654 scratch8 |= SDHCI_VDD2_POWER_ON | SDHCI_VDD2_POWER_180;
655 }
656
657 sdhci_writeb(host, scratch8, SDHCI_POWER_CONTROL);
658
659 /* UnLock WP */
660 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch8);
661 scratch8 &= 0x7f;
662 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch8);
663
664 /* Wait for express card clkreqn assert */
665 ret = read_poll_timeout(sdhci_readb, scratch8, !(scratch8 & BIT(0)),
666 1, 30000, false, host, O2_SD_EXP_INT_REG);
667
668 if (!ret) {
669 /* Switch to PCIe mode */
670 scratch16 = sdhci_readw(host, O2_SD_PCIE_SWITCH);
671 scratch16 |= BIT(8);
672 sdhci_writew(host, scratch16, O2_SD_PCIE_SWITCH);
673 } else {
674 /* Power off VDD2 voltage*/
675 scratch8 = sdhci_readb(host, SDHCI_POWER_CONTROL);
676 scratch8 &= 0x0F;
677 sdhci_writeb(host, scratch8, SDHCI_POWER_CONTROL);
678
679 /* Keep mode as UHSI */
680 pci_read_config_word(chip->pdev, O2_SD_PARA_SET_REG1, &scratch16);
681 scratch16 &= ~BIT(11);
682 pci_write_config_word(chip->pdev, O2_SD_PARA_SET_REG1, scratch16);
683
684 host->mmc->ios.timing = MMC_TIMING_LEGACY;
685 pr_info("%s: Express card initialization failed, falling back to Legacy\n",
686 mmc_hostname(host->mmc));
687 }
688 /* Lock WP */
689 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch8);
690 scratch8 |= 0x80;
691 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch8);
692
693 return 0;
694}
695
696static void sdhci_pci_o2_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd)
697{
698 struct sdhci_pci_chip *chip;
699 struct sdhci_pci_slot *slot = sdhci_priv(host);
700 u32 scratch_32 = 0;
701 u8 scratch_8 = 0;
702
703 chip = slot->chip;
704
705 if (mode == MMC_POWER_OFF) {
706 /* UnLock WP */
707 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch_8);
708 scratch_8 &= 0x7f;
709 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8);
710
711 /* Set PCR 0x354[16] to switch Clock Source back to OPE Clock */
712 pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, &scratch_32);
713 scratch_32 &= ~(O2_SD_SEL_DLL);
714 pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, scratch_32);
715
716 /* Lock WP */
717 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch_8);
718 scratch_8 |= 0x80;
719 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8);
720 }
721
722 sdhci_set_power(host, mode, vdd);
723}
724
725static int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot)
726{
727 struct sdhci_pci_chip *chip;
728 struct sdhci_host *host;
729 struct o2_host *o2_host = sdhci_pci_priv(slot);
730 u32 reg, caps;
731 int ret;
732
733 chip = slot->chip;
734 host = slot->host;
735
736 o2_host->dll_adjust_count = 0;
737 caps = sdhci_readl(host, SDHCI_CAPABILITIES);
738
739 /*
740 * mmc_select_bus_width() will test the bus to determine the actual bus
741 * width.
742 */
743 if (caps & SDHCI_CAN_DO_8BIT)
744 host->mmc->caps |= MMC_CAP_8_BIT_DATA;
745
746 host->quirks2 |= SDHCI_QUIRK2_BROKEN_DDR50;
747
748 sdhci_pci_o2_enable_msi(chip, host);
749
750 host->mmc_host_ops.execute_tuning = sdhci_o2_execute_tuning;
751 switch (chip->pdev->device) {
752 case PCI_DEVICE_ID_O2_SDS0:
753 case PCI_DEVICE_ID_O2_SEABIRD0:
754 case PCI_DEVICE_ID_O2_SEABIRD1:
755 case PCI_DEVICE_ID_O2_SDS1:
756 case PCI_DEVICE_ID_O2_FUJIN2:
757 reg = sdhci_readl(host, O2_SD_VENDOR_SETTING);
758 if (reg & 0x1)
759 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
760
761 if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD0) {
762 ret = pci_read_config_dword(chip->pdev,
763 O2_SD_MISC_SETTING, ®);
764 if (ret)
765 return -EIO;
766 if (reg & (1 << 4)) {
767 pr_info("%s: emmc 1.8v flag is set, force 1.8v signaling voltage\n",
768 mmc_hostname(host->mmc));
769 host->flags &= ~SDHCI_SIGNALING_330;
770 host->flags |= SDHCI_SIGNALING_180;
771 host->mmc->caps2 |= MMC_CAP2_NO_SD;
772 host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
773 pci_write_config_dword(chip->pdev,
774 O2_SD_DETECT_SETTING, 3);
775 }
776
777 slot->host->mmc_host_ops.get_cd = sdhci_o2_get_cd;
778 }
779
780 if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD1) {
781 slot->host->mmc_host_ops.get_cd = sdhci_o2_get_cd;
782 host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
783 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
784 }
785
786 if (chip->pdev->device != PCI_DEVICE_ID_O2_FUJIN2)
787 break;
788 /* set dll watch dog timer */
789 reg = sdhci_readl(host, O2_SD_VENDOR_SETTING2);
790 reg |= (1 << 12);
791 sdhci_writel(host, reg, O2_SD_VENDOR_SETTING2);
792 break;
793 case PCI_DEVICE_ID_O2_GG8_9860:
794 case PCI_DEVICE_ID_O2_GG8_9861:
795 case PCI_DEVICE_ID_O2_GG8_9862:
796 case PCI_DEVICE_ID_O2_GG8_9863:
797 host->mmc->caps2 |= MMC_CAP2_NO_SDIO | MMC_CAP2_SD_EXP | MMC_CAP2_SD_EXP_1_2V;
798 host->mmc->caps |= MMC_CAP_HW_RESET;
799 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
800 slot->host->mmc_host_ops.get_cd = sdhci_o2_get_cd;
801 host->mmc_host_ops.init_sd_express = sdhci_pci_o2_init_sd_express;
802 break;
803 default:
804 break;
805 }
806
807 return 0;
808}
809
810static int sdhci_pci_o2_probe(struct sdhci_pci_chip *chip)
811{
812 int ret;
813 u8 scratch;
814 u16 scratch16;
815 u32 scratch_32;
816
817 switch (chip->pdev->device) {
818 case PCI_DEVICE_ID_O2_8220:
819 case PCI_DEVICE_ID_O2_8221:
820 case PCI_DEVICE_ID_O2_8320:
821 case PCI_DEVICE_ID_O2_8321:
822 /* This extra setup is required due to broken ADMA. */
823 ret = pci_read_config_byte(chip->pdev,
824 O2_SD_LOCK_WP, &scratch);
825 if (ret)
826 return ret;
827 scratch &= 0x7f;
828 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
829
830 /* Set Multi 3 to VCC3V# */
831 pci_write_config_byte(chip->pdev, O2_SD_MULTI_VCC3V, 0x08);
832
833 /* Disable CLK_REQ# support after media DET */
834 ret = pci_read_config_byte(chip->pdev,
835 O2_SD_CLKREQ, &scratch);
836 if (ret)
837 return ret;
838 scratch |= 0x20;
839 pci_write_config_byte(chip->pdev, O2_SD_CLKREQ, scratch);
840
841 /* Choose capabilities, enable SDMA. We have to write 0x01
842 * to the capabilities register first to unlock it.
843 */
844 ret = pci_read_config_byte(chip->pdev, O2_SD_CAPS, &scratch);
845 if (ret)
846 return ret;
847 scratch |= 0x01;
848 pci_write_config_byte(chip->pdev, O2_SD_CAPS, scratch);
849 pci_write_config_byte(chip->pdev, O2_SD_CAPS, 0x73);
850
851 /* Disable ADMA1/2 */
852 pci_write_config_byte(chip->pdev, O2_SD_ADMA1, 0x39);
853 pci_write_config_byte(chip->pdev, O2_SD_ADMA2, 0x08);
854
855 /* Disable the infinite transfer mode */
856 ret = pci_read_config_byte(chip->pdev,
857 O2_SD_INF_MOD, &scratch);
858 if (ret)
859 return ret;
860 scratch |= 0x08;
861 pci_write_config_byte(chip->pdev, O2_SD_INF_MOD, scratch);
862
863 /* Lock WP */
864 ret = pci_read_config_byte(chip->pdev,
865 O2_SD_LOCK_WP, &scratch);
866 if (ret)
867 return ret;
868 scratch |= 0x80;
869 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
870 break;
871 case PCI_DEVICE_ID_O2_SDS0:
872 case PCI_DEVICE_ID_O2_SDS1:
873 case PCI_DEVICE_ID_O2_FUJIN2:
874 /* UnLock WP */
875 ret = pci_read_config_byte(chip->pdev,
876 O2_SD_LOCK_WP, &scratch);
877 if (ret)
878 return ret;
879
880 scratch &= 0x7f;
881 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
882
883 /* DevId=8520 subId= 0x11 or 0x12 Type Chip support */
884 if (chip->pdev->device == PCI_DEVICE_ID_O2_FUJIN2) {
885 ret = pci_read_config_dword(chip->pdev,
886 O2_SD_FUNC_REG0,
887 &scratch_32);
888 if (ret)
889 return ret;
890 scratch_32 = ((scratch_32 & 0xFF000000) >> 24);
891
892 /* Check Whether subId is 0x11 or 0x12 */
893 if ((scratch_32 == 0x11) || (scratch_32 == 0x12)) {
894 scratch_32 = 0x25100000;
895
896 o2_pci_set_baseclk(chip, scratch_32);
897 ret = pci_read_config_dword(chip->pdev,
898 O2_SD_FUNC_REG4,
899 &scratch_32);
900 if (ret)
901 return ret;
902
903 /* Enable Base Clk setting change */
904 scratch_32 |= O2_SD_FREG4_ENABLE_CLK_SET;
905 pci_write_config_dword(chip->pdev,
906 O2_SD_FUNC_REG4,
907 scratch_32);
908
909 /* Set Tuning Window to 4 */
910 pci_write_config_byte(chip->pdev,
911 O2_SD_TUNING_CTRL, 0x44);
912
913 break;
914 }
915 }
916
917 /* Enable 8520 led function */
918 o2_pci_led_enable(chip);
919
920 /* Set timeout CLK */
921 ret = pci_read_config_dword(chip->pdev,
922 O2_SD_CLK_SETTING, &scratch_32);
923 if (ret)
924 return ret;
925
926 scratch_32 &= ~(0xFF00);
927 scratch_32 |= 0x07E0C800;
928 pci_write_config_dword(chip->pdev,
929 O2_SD_CLK_SETTING, scratch_32);
930
931 ret = pci_read_config_dword(chip->pdev,
932 O2_SD_CLKREQ, &scratch_32);
933 if (ret)
934 return ret;
935 scratch_32 |= 0x3;
936 pci_write_config_dword(chip->pdev, O2_SD_CLKREQ, scratch_32);
937
938 ret = pci_read_config_dword(chip->pdev,
939 O2_SD_PLL_SETTING, &scratch_32);
940 if (ret)
941 return ret;
942
943 scratch_32 &= ~(0x1F3F070E);
944 scratch_32 |= 0x18270106;
945 pci_write_config_dword(chip->pdev,
946 O2_SD_PLL_SETTING, scratch_32);
947
948 /* Disable UHS1 funciton */
949 ret = pci_read_config_dword(chip->pdev,
950 O2_SD_CAP_REG2, &scratch_32);
951 if (ret)
952 return ret;
953 scratch_32 &= ~(0xE0);
954 pci_write_config_dword(chip->pdev,
955 O2_SD_CAP_REG2, scratch_32);
956
957 if (chip->pdev->device == PCI_DEVICE_ID_O2_FUJIN2)
958 sdhci_pci_o2_fujin2_pci_init(chip);
959
960 /* Lock WP */
961 ret = pci_read_config_byte(chip->pdev,
962 O2_SD_LOCK_WP, &scratch);
963 if (ret)
964 return ret;
965 scratch |= 0x80;
966 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
967 break;
968 case PCI_DEVICE_ID_O2_SEABIRD0:
969 case PCI_DEVICE_ID_O2_SEABIRD1:
970 /* UnLock WP */
971 ret = pci_read_config_byte(chip->pdev,
972 O2_SD_LOCK_WP, &scratch);
973 if (ret)
974 return ret;
975
976 scratch &= 0x7f;
977 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
978
979 ret = pci_read_config_dword(chip->pdev,
980 O2_SD_PLL_SETTING, &scratch_32);
981 if (ret)
982 return ret;
983
984 if ((scratch_32 & 0xff000000) == 0x01000000) {
985 scratch_32 &= 0x0000FFFF;
986 scratch_32 |= 0x1F340000;
987
988 pci_write_config_dword(chip->pdev,
989 O2_SD_PLL_SETTING, scratch_32);
990 } else {
991 scratch_32 &= 0x0000FFFF;
992 scratch_32 |= 0x25100000;
993
994 pci_write_config_dword(chip->pdev,
995 O2_SD_PLL_SETTING, scratch_32);
996
997 ret = pci_read_config_dword(chip->pdev,
998 O2_SD_FUNC_REG4,
999 &scratch_32);
1000 if (ret)
1001 return ret;
1002 scratch_32 |= (1 << 22);
1003 pci_write_config_dword(chip->pdev,
1004 O2_SD_FUNC_REG4, scratch_32);
1005 }
1006
1007 /* Set Tuning Windows to 5 */
1008 pci_write_config_byte(chip->pdev,
1009 O2_SD_TUNING_CTRL, 0x55);
1010 //Adjust 1st and 2nd CD debounce time
1011 pci_read_config_dword(chip->pdev, O2_SD_MISC_CTRL2, &scratch_32);
1012 scratch_32 &= 0xFFE7FFFF;
1013 scratch_32 |= 0x00180000;
1014 pci_write_config_dword(chip->pdev, O2_SD_MISC_CTRL2, scratch_32);
1015 pci_write_config_dword(chip->pdev, O2_SD_DETECT_SETTING, 1);
1016 /* Lock WP */
1017 ret = pci_read_config_byte(chip->pdev,
1018 O2_SD_LOCK_WP, &scratch);
1019 if (ret)
1020 return ret;
1021 scratch |= 0x80;
1022 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
1023 break;
1024 case PCI_DEVICE_ID_O2_GG8_9860:
1025 case PCI_DEVICE_ID_O2_GG8_9861:
1026 case PCI_DEVICE_ID_O2_GG8_9862:
1027 case PCI_DEVICE_ID_O2_GG8_9863:
1028 /* UnLock WP */
1029 ret = pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
1030 if (ret)
1031 return ret;
1032 scratch &= 0x7f;
1033 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
1034
1035 /* Select mode switch source as software control */
1036 pci_read_config_word(chip->pdev, O2_SD_PARA_SET_REG1, &scratch16);
1037 scratch16 &= 0xF8FF;
1038 scratch16 |= BIT(9);
1039 pci_write_config_word(chip->pdev, O2_SD_PARA_SET_REG1, scratch16);
1040
1041 /* set VDD1 supply source */
1042 pci_read_config_word(chip->pdev, O2_SD_VDDX_CTRL_REG, &scratch16);
1043 scratch16 &= 0xFFE3;
1044 scratch16 |= BIT(3);
1045 pci_write_config_word(chip->pdev, O2_SD_VDDX_CTRL_REG, scratch16);
1046
1047 /* Set host drive strength*/
1048 scratch16 = 0x0025;
1049 pci_write_config_word(chip->pdev, O2_SD_PLL_SETTING, scratch16);
1050
1051 /* Set output delay*/
1052 pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, &scratch_32);
1053 scratch_32 &= 0xFF0FFF00;
1054 scratch_32 |= 0x00B0003B;
1055 pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, scratch_32);
1056
1057 /* Lock WP */
1058 ret = pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
1059 if (ret)
1060 return ret;
1061 scratch |= 0x80;
1062 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
1063 break;
1064 }
1065
1066 return 0;
1067}
1068
1069#ifdef CONFIG_PM_SLEEP
1070static int sdhci_pci_o2_resume(struct sdhci_pci_chip *chip)
1071{
1072 sdhci_pci_o2_probe(chip);
1073 return sdhci_pci_resume_host(chip);
1074}
1075#endif
1076
1077static const struct sdhci_ops sdhci_pci_o2_ops = {
1078 .set_clock = sdhci_pci_o2_set_clock,
1079 .enable_dma = sdhci_pci_enable_dma,
1080 .set_bus_width = sdhci_set_bus_width,
1081 .reset = sdhci_reset,
1082 .set_uhs_signaling = sdhci_set_uhs_signaling,
1083 .set_power = sdhci_pci_o2_set_power,
1084};
1085
1086const struct sdhci_pci_fixes sdhci_o2 = {
1087 .probe = sdhci_pci_o2_probe,
1088 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
1089 .quirks2 = SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD,
1090 .probe_slot = sdhci_pci_o2_probe_slot,
1091#ifdef CONFIG_PM_SLEEP
1092 .resume = sdhci_pci_o2_resume,
1093#endif
1094 .ops = &sdhci_pci_o2_ops,
1095 .priv_size = sizeof(struct o2_host),
1096};
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 BayHub Technology Ltd.
4 *
5 * Authors: Peter Guo <peter.guo@bayhubtech.com>
6 * Adam Lee <adam.lee@canonical.com>
7 * Ernest Zhang <ernest.zhang@bayhubtech.com>
8 */
9
10#include <linux/pci.h>
11#include <linux/mmc/host.h>
12#include <linux/mmc/mmc.h>
13#include <linux/delay.h>
14#include <linux/iopoll.h>
15
16#include "sdhci.h"
17#include "sdhci-pci.h"
18
19/*
20 * O2Micro device registers
21 */
22
23#define O2_SD_MISC_REG5 0x64
24#define O2_SD_LD0_CTRL 0x68
25#define O2_SD_DEV_CTRL 0x88
26#define O2_SD_LOCK_WP 0xD3
27#define O2_SD_TEST_REG 0xD4
28#define O2_SD_FUNC_REG0 0xDC
29#define O2_SD_MULTI_VCC3V 0xEE
30#define O2_SD_CLKREQ 0xEC
31#define O2_SD_CAPS 0xE0
32#define O2_SD_ADMA1 0xE2
33#define O2_SD_ADMA2 0xE7
34#define O2_SD_INF_MOD 0xF1
35#define O2_SD_MISC_CTRL4 0xFC
36#define O2_SD_MISC_CTRL 0x1C0
37#define O2_SD_PWR_FORCE_L0 0x0002
38#define O2_SD_TUNING_CTRL 0x300
39#define O2_SD_PLL_SETTING 0x304
40#define O2_SD_MISC_SETTING 0x308
41#define O2_SD_CLK_SETTING 0x328
42#define O2_SD_CAP_REG2 0x330
43#define O2_SD_CAP_REG0 0x334
44#define O2_SD_UHS1_CAP_SETTING 0x33C
45#define O2_SD_DELAY_CTRL 0x350
46#define O2_SD_UHS2_L1_CTRL 0x35C
47#define O2_SD_FUNC_REG3 0x3E0
48#define O2_SD_FUNC_REG4 0x3E4
49#define O2_SD_LED_ENABLE BIT(6)
50#define O2_SD_FREG0_LEDOFF BIT(13)
51#define O2_SD_FREG4_ENABLE_CLK_SET BIT(22)
52
53#define O2_SD_VENDOR_SETTING 0x110
54#define O2_SD_VENDOR_SETTING2 0x1C8
55#define O2_SD_HW_TUNING_DISABLE BIT(4)
56
57#define O2_PLL_DLL_WDT_CONTROL1 0x1CC
58#define O2_PLL_FORCE_ACTIVE BIT(18)
59#define O2_PLL_LOCK_STATUS BIT(14)
60#define O2_PLL_SOFT_RESET BIT(12)
61#define O2_DLL_LOCK_STATUS BIT(11)
62
63#define O2_SD_DETECT_SETTING 0x324
64
65static const u32 dmdn_table[] = {0x2B1C0000,
66 0x2C1A0000, 0x371B0000, 0x35100000};
67#define DMDN_SZ ARRAY_SIZE(dmdn_table)
68
69struct o2_host {
70 u8 dll_adjust_count;
71};
72
73static void sdhci_o2_wait_card_detect_stable(struct sdhci_host *host)
74{
75 ktime_t timeout;
76 u32 scratch32;
77
78 /* Wait max 50 ms */
79 timeout = ktime_add_ms(ktime_get(), 50);
80 while (1) {
81 bool timedout = ktime_after(ktime_get(), timeout);
82
83 scratch32 = sdhci_readl(host, SDHCI_PRESENT_STATE);
84 if ((scratch32 & SDHCI_CARD_PRESENT) >> SDHCI_CARD_PRES_SHIFT
85 == (scratch32 & SDHCI_CD_LVL) >> SDHCI_CD_LVL_SHIFT)
86 break;
87
88 if (timedout) {
89 pr_err("%s: Card Detect debounce never finished.\n",
90 mmc_hostname(host->mmc));
91 sdhci_dumpregs(host);
92 return;
93 }
94 udelay(10);
95 }
96}
97
98static void sdhci_o2_enable_internal_clock(struct sdhci_host *host)
99{
100 ktime_t timeout;
101 u16 scratch;
102 u32 scratch32;
103
104 /* PLL software reset */
105 scratch32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
106 scratch32 |= O2_PLL_SOFT_RESET;
107 sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
108 udelay(1);
109 scratch32 &= ~(O2_PLL_SOFT_RESET);
110 sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
111
112 /* PLL force active */
113 scratch32 |= O2_PLL_FORCE_ACTIVE;
114 sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
115
116 /* Wait max 20 ms */
117 timeout = ktime_add_ms(ktime_get(), 20);
118 while (1) {
119 bool timedout = ktime_after(ktime_get(), timeout);
120
121 scratch = sdhci_readw(host, O2_PLL_DLL_WDT_CONTROL1);
122 if (scratch & O2_PLL_LOCK_STATUS)
123 break;
124 if (timedout) {
125 pr_err("%s: Internal clock never stabilised.\n",
126 mmc_hostname(host->mmc));
127 sdhci_dumpregs(host);
128 goto out;
129 }
130 udelay(10);
131 }
132
133 /* Wait for card detect finish */
134 udelay(1);
135 sdhci_o2_wait_card_detect_stable(host);
136
137out:
138 /* Cancel PLL force active */
139 scratch32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
140 scratch32 &= ~O2_PLL_FORCE_ACTIVE;
141 sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
142}
143
144static int sdhci_o2_get_cd(struct mmc_host *mmc)
145{
146 struct sdhci_host *host = mmc_priv(mmc);
147
148 if (!(sdhci_readw(host, O2_PLL_DLL_WDT_CONTROL1) & O2_PLL_LOCK_STATUS))
149 sdhci_o2_enable_internal_clock(host);
150
151 return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
152}
153
154static void o2_pci_set_baseclk(struct sdhci_pci_chip *chip, u32 value)
155{
156 u32 scratch_32;
157
158 pci_read_config_dword(chip->pdev,
159 O2_SD_PLL_SETTING, &scratch_32);
160
161 scratch_32 &= 0x0000FFFF;
162 scratch_32 |= value;
163
164 pci_write_config_dword(chip->pdev,
165 O2_SD_PLL_SETTING, scratch_32);
166}
167
168static u32 sdhci_o2_pll_dll_wdt_control(struct sdhci_host *host)
169{
170 return sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
171}
172
173/*
174 * This function is used to detect dll lock status.
175 * Since the dll lock status bit will toggle randomly
176 * with very short interval which needs to be polled
177 * as fast as possible. Set sleep_us as 1 microsecond.
178 */
179static int sdhci_o2_wait_dll_detect_lock(struct sdhci_host *host)
180{
181 u32 scratch32 = 0;
182
183 return readx_poll_timeout(sdhci_o2_pll_dll_wdt_control, host,
184 scratch32, !(scratch32 & O2_DLL_LOCK_STATUS), 1, 1000000);
185}
186
187static void sdhci_o2_set_tuning_mode(struct sdhci_host *host)
188{
189 u16 reg;
190
191 /* enable hardware tuning */
192 reg = sdhci_readw(host, O2_SD_VENDOR_SETTING);
193 reg &= ~O2_SD_HW_TUNING_DISABLE;
194 sdhci_writew(host, reg, O2_SD_VENDOR_SETTING);
195}
196
197static void __sdhci_o2_execute_tuning(struct sdhci_host *host, u32 opcode)
198{
199 int i;
200
201 sdhci_send_tuning(host, opcode);
202
203 for (i = 0; i < 150; i++) {
204 u16 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
205
206 if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) {
207 if (ctrl & SDHCI_CTRL_TUNED_CLK) {
208 host->tuning_done = true;
209 return;
210 }
211 pr_warn("%s: HW tuning failed !\n",
212 mmc_hostname(host->mmc));
213 break;
214 }
215
216 mdelay(1);
217 }
218
219 pr_info("%s: Tuning failed, falling back to fixed sampling clock\n",
220 mmc_hostname(host->mmc));
221 sdhci_reset_tuning(host);
222}
223
224/*
225 * This function is used to fix o2 dll shift issue.
226 * It isn't necessary to detect card present before recovery.
227 * Firstly, it is used by bht emmc card, which is embedded.
228 * Second, before call recovery card present will be detected
229 * outside of the execute tuning function.
230 */
231static int sdhci_o2_dll_recovery(struct sdhci_host *host)
232{
233 int ret = 0;
234 u8 scratch_8 = 0;
235 u32 scratch_32 = 0;
236 struct sdhci_pci_slot *slot = sdhci_priv(host);
237 struct sdhci_pci_chip *chip = slot->chip;
238 struct o2_host *o2_host = sdhci_pci_priv(slot);
239
240 /* UnLock WP */
241 pci_read_config_byte(chip->pdev,
242 O2_SD_LOCK_WP, &scratch_8);
243 scratch_8 &= 0x7f;
244 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8);
245 while (o2_host->dll_adjust_count < DMDN_SZ && !ret) {
246 /* Disable clock */
247 sdhci_writeb(host, 0, SDHCI_CLOCK_CONTROL);
248
249 /* PLL software reset */
250 scratch_32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
251 scratch_32 |= O2_PLL_SOFT_RESET;
252 sdhci_writel(host, scratch_32, O2_PLL_DLL_WDT_CONTROL1);
253
254 pci_read_config_dword(chip->pdev,
255 O2_SD_FUNC_REG4,
256 &scratch_32);
257 /* Enable Base Clk setting change */
258 scratch_32 |= O2_SD_FREG4_ENABLE_CLK_SET;
259 pci_write_config_dword(chip->pdev, O2_SD_FUNC_REG4, scratch_32);
260 o2_pci_set_baseclk(chip, dmdn_table[o2_host->dll_adjust_count]);
261
262 /* Enable internal clock */
263 scratch_8 = SDHCI_CLOCK_INT_EN;
264 sdhci_writeb(host, scratch_8, SDHCI_CLOCK_CONTROL);
265
266 if (sdhci_o2_get_cd(host->mmc)) {
267 /*
268 * need wait at least 5ms for dll status stable,
269 * after enable internal clock
270 */
271 usleep_range(5000, 6000);
272 if (sdhci_o2_wait_dll_detect_lock(host)) {
273 scratch_8 |= SDHCI_CLOCK_CARD_EN;
274 sdhci_writeb(host, scratch_8,
275 SDHCI_CLOCK_CONTROL);
276 ret = 1;
277 } else {
278 pr_warn("%s: DLL unlocked when dll_adjust_count is %d.\n",
279 mmc_hostname(host->mmc),
280 o2_host->dll_adjust_count);
281 }
282 } else {
283 pr_err("%s: card present detect failed.\n",
284 mmc_hostname(host->mmc));
285 break;
286 }
287
288 o2_host->dll_adjust_count++;
289 }
290 if (!ret && o2_host->dll_adjust_count == DMDN_SZ)
291 pr_err("%s: DLL adjust over max times\n",
292 mmc_hostname(host->mmc));
293 /* Lock WP */
294 pci_read_config_byte(chip->pdev,
295 O2_SD_LOCK_WP, &scratch_8);
296 scratch_8 |= 0x80;
297 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8);
298 return ret;
299}
300
301static int sdhci_o2_execute_tuning(struct mmc_host *mmc, u32 opcode)
302{
303 struct sdhci_host *host = mmc_priv(mmc);
304 int current_bus_width = 0;
305 u32 scratch32 = 0;
306 u16 scratch = 0;
307
308 /*
309 * This handler only implements the eMMC tuning that is specific to
310 * this controller. Fall back to the standard method for other TIMING.
311 */
312 if ((host->timing != MMC_TIMING_MMC_HS200) &&
313 (host->timing != MMC_TIMING_UHS_SDR104))
314 return sdhci_execute_tuning(mmc, opcode);
315
316 if (WARN_ON((opcode != MMC_SEND_TUNING_BLOCK_HS200) &&
317 (opcode != MMC_SEND_TUNING_BLOCK)))
318 return -EINVAL;
319
320 /* Force power mode enter L0 */
321 scratch = sdhci_readw(host, O2_SD_MISC_CTRL);
322 scratch |= O2_SD_PWR_FORCE_L0;
323 sdhci_writew(host, scratch, O2_SD_MISC_CTRL);
324
325 /* wait DLL lock, timeout value 5ms */
326 if (readx_poll_timeout(sdhci_o2_pll_dll_wdt_control, host,
327 scratch32, (scratch32 & O2_DLL_LOCK_STATUS), 1, 5000))
328 pr_warn("%s: DLL can't lock in 5ms after force L0 during tuning.\n",
329 mmc_hostname(host->mmc));
330 /*
331 * Judge the tuning reason, whether caused by dll shift
332 * If cause by dll shift, should call sdhci_o2_dll_recovery
333 */
334 if (!sdhci_o2_wait_dll_detect_lock(host))
335 if (!sdhci_o2_dll_recovery(host)) {
336 pr_err("%s: o2 dll recovery failed\n",
337 mmc_hostname(host->mmc));
338 return -EINVAL;
339 }
340 /*
341 * o2 sdhci host didn't support 8bit emmc tuning
342 */
343 if (mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
344 current_bus_width = mmc->ios.bus_width;
345 mmc->ios.bus_width = MMC_BUS_WIDTH_4;
346 sdhci_set_bus_width(host, MMC_BUS_WIDTH_4);
347 }
348
349 sdhci_o2_set_tuning_mode(host);
350
351 sdhci_start_tuning(host);
352
353 __sdhci_o2_execute_tuning(host, opcode);
354
355 sdhci_end_tuning(host);
356
357 if (current_bus_width == MMC_BUS_WIDTH_8) {
358 mmc->ios.bus_width = MMC_BUS_WIDTH_8;
359 sdhci_set_bus_width(host, current_bus_width);
360 }
361
362 /* Cancel force power mode enter L0 */
363 scratch = sdhci_readw(host, O2_SD_MISC_CTRL);
364 scratch &= ~(O2_SD_PWR_FORCE_L0);
365 sdhci_writew(host, scratch, O2_SD_MISC_CTRL);
366
367 sdhci_reset(host, SDHCI_RESET_CMD);
368 sdhci_reset(host, SDHCI_RESET_DATA);
369
370 host->flags &= ~SDHCI_HS400_TUNING;
371 return 0;
372}
373
374static void o2_pci_led_enable(struct sdhci_pci_chip *chip)
375{
376 int ret;
377 u32 scratch_32;
378
379 /* Set led of SD host function enable */
380 ret = pci_read_config_dword(chip->pdev,
381 O2_SD_FUNC_REG0, &scratch_32);
382 if (ret)
383 return;
384
385 scratch_32 &= ~O2_SD_FREG0_LEDOFF;
386 pci_write_config_dword(chip->pdev,
387 O2_SD_FUNC_REG0, scratch_32);
388
389 ret = pci_read_config_dword(chip->pdev,
390 O2_SD_TEST_REG, &scratch_32);
391 if (ret)
392 return;
393
394 scratch_32 |= O2_SD_LED_ENABLE;
395 pci_write_config_dword(chip->pdev,
396 O2_SD_TEST_REG, scratch_32);
397}
398
399static void sdhci_pci_o2_fujin2_pci_init(struct sdhci_pci_chip *chip)
400{
401 u32 scratch_32;
402 int ret;
403 /* Improve write performance for SD3.0 */
404 ret = pci_read_config_dword(chip->pdev, O2_SD_DEV_CTRL, &scratch_32);
405 if (ret)
406 return;
407 scratch_32 &= ~((1 << 12) | (1 << 13) | (1 << 14));
408 pci_write_config_dword(chip->pdev, O2_SD_DEV_CTRL, scratch_32);
409
410 /* Enable Link abnormal reset generating Reset */
411 ret = pci_read_config_dword(chip->pdev, O2_SD_MISC_REG5, &scratch_32);
412 if (ret)
413 return;
414 scratch_32 &= ~((1 << 19) | (1 << 11));
415 scratch_32 |= (1 << 10);
416 pci_write_config_dword(chip->pdev, O2_SD_MISC_REG5, scratch_32);
417
418 /* set card power over current protection */
419 ret = pci_read_config_dword(chip->pdev, O2_SD_TEST_REG, &scratch_32);
420 if (ret)
421 return;
422 scratch_32 |= (1 << 4);
423 pci_write_config_dword(chip->pdev, O2_SD_TEST_REG, scratch_32);
424
425 /* adjust the output delay for SD mode */
426 pci_write_config_dword(chip->pdev, O2_SD_DELAY_CTRL, 0x00002492);
427
428 /* Set the output voltage setting of Aux 1.2v LDO */
429 ret = pci_read_config_dword(chip->pdev, O2_SD_LD0_CTRL, &scratch_32);
430 if (ret)
431 return;
432 scratch_32 &= ~(3 << 12);
433 pci_write_config_dword(chip->pdev, O2_SD_LD0_CTRL, scratch_32);
434
435 /* Set Max power supply capability of SD host */
436 ret = pci_read_config_dword(chip->pdev, O2_SD_CAP_REG0, &scratch_32);
437 if (ret)
438 return;
439 scratch_32 &= ~(0x01FE);
440 scratch_32 |= 0x00CC;
441 pci_write_config_dword(chip->pdev, O2_SD_CAP_REG0, scratch_32);
442 /* Set DLL Tuning Window */
443 ret = pci_read_config_dword(chip->pdev,
444 O2_SD_TUNING_CTRL, &scratch_32);
445 if (ret)
446 return;
447 scratch_32 &= ~(0x000000FF);
448 scratch_32 |= 0x00000066;
449 pci_write_config_dword(chip->pdev, O2_SD_TUNING_CTRL, scratch_32);
450
451 /* Set UHS2 T_EIDLE */
452 ret = pci_read_config_dword(chip->pdev,
453 O2_SD_UHS2_L1_CTRL, &scratch_32);
454 if (ret)
455 return;
456 scratch_32 &= ~(0x000000FC);
457 scratch_32 |= 0x00000084;
458 pci_write_config_dword(chip->pdev, O2_SD_UHS2_L1_CTRL, scratch_32);
459
460 /* Set UHS2 Termination */
461 ret = pci_read_config_dword(chip->pdev, O2_SD_FUNC_REG3, &scratch_32);
462 if (ret)
463 return;
464 scratch_32 &= ~((1 << 21) | (1 << 30));
465
466 pci_write_config_dword(chip->pdev, O2_SD_FUNC_REG3, scratch_32);
467
468 /* Set L1 Entrance Timer */
469 ret = pci_read_config_dword(chip->pdev, O2_SD_CAPS, &scratch_32);
470 if (ret)
471 return;
472 scratch_32 &= ~(0xf0000000);
473 scratch_32 |= 0x30000000;
474 pci_write_config_dword(chip->pdev, O2_SD_CAPS, scratch_32);
475
476 ret = pci_read_config_dword(chip->pdev,
477 O2_SD_MISC_CTRL4, &scratch_32);
478 if (ret)
479 return;
480 scratch_32 &= ~(0x000f0000);
481 scratch_32 |= 0x00080000;
482 pci_write_config_dword(chip->pdev, O2_SD_MISC_CTRL4, scratch_32);
483}
484
485static void sdhci_pci_o2_enable_msi(struct sdhci_pci_chip *chip,
486 struct sdhci_host *host)
487{
488 int ret;
489
490 ret = pci_find_capability(chip->pdev, PCI_CAP_ID_MSI);
491 if (!ret) {
492 pr_info("%s: unsupport msi, use INTx irq\n",
493 mmc_hostname(host->mmc));
494 return;
495 }
496
497 ret = pci_alloc_irq_vectors(chip->pdev, 1, 1,
498 PCI_IRQ_MSI | PCI_IRQ_MSIX);
499 if (ret < 0) {
500 pr_err("%s: enable PCI MSI failed, err=%d\n",
501 mmc_hostname(host->mmc), ret);
502 return;
503 }
504
505 host->irq = pci_irq_vector(chip->pdev, 0);
506}
507
508static void sdhci_o2_enable_clk(struct sdhci_host *host, u16 clk)
509{
510 /* Enable internal clock */
511 clk |= SDHCI_CLOCK_INT_EN;
512 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
513
514 sdhci_o2_enable_internal_clock(host);
515 if (sdhci_o2_get_cd(host->mmc)) {
516 clk |= SDHCI_CLOCK_CARD_EN;
517 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
518 }
519}
520
521static void sdhci_pci_o2_set_clock(struct sdhci_host *host, unsigned int clock)
522{
523 u16 clk;
524 u8 scratch;
525 u32 scratch_32;
526 struct sdhci_pci_slot *slot = sdhci_priv(host);
527 struct sdhci_pci_chip *chip = slot->chip;
528
529 host->mmc->actual_clock = 0;
530
531 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
532
533 if (clock == 0)
534 return;
535
536 if ((host->timing == MMC_TIMING_UHS_SDR104) && (clock == 200000000)) {
537 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
538
539 scratch &= 0x7f;
540 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
541
542 pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32);
543
544 if ((scratch_32 & 0xFFFF0000) != 0x2c280000)
545 o2_pci_set_baseclk(chip, 0x2c280000);
546
547 pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
548
549 scratch |= 0x80;
550 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
551 }
552
553 clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
554 sdhci_o2_enable_clk(host, clk);
555}
556
557static int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot)
558{
559 struct sdhci_pci_chip *chip;
560 struct sdhci_host *host;
561 struct o2_host *o2_host = sdhci_pci_priv(slot);
562 u32 reg, caps;
563 int ret;
564
565 chip = slot->chip;
566 host = slot->host;
567
568 o2_host->dll_adjust_count = 0;
569 caps = sdhci_readl(host, SDHCI_CAPABILITIES);
570
571 /*
572 * mmc_select_bus_width() will test the bus to determine the actual bus
573 * width.
574 */
575 if (caps & SDHCI_CAN_DO_8BIT)
576 host->mmc->caps |= MMC_CAP_8_BIT_DATA;
577
578 switch (chip->pdev->device) {
579 case PCI_DEVICE_ID_O2_SDS0:
580 case PCI_DEVICE_ID_O2_SEABIRD0:
581 case PCI_DEVICE_ID_O2_SEABIRD1:
582 case PCI_DEVICE_ID_O2_SDS1:
583 case PCI_DEVICE_ID_O2_FUJIN2:
584 reg = sdhci_readl(host, O2_SD_VENDOR_SETTING);
585 if (reg & 0x1)
586 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
587
588 sdhci_pci_o2_enable_msi(chip, host);
589
590 if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD0) {
591 ret = pci_read_config_dword(chip->pdev,
592 O2_SD_MISC_SETTING, ®);
593 if (ret)
594 return -EIO;
595 if (reg & (1 << 4)) {
596 pr_info("%s: emmc 1.8v flag is set, force 1.8v signaling voltage\n",
597 mmc_hostname(host->mmc));
598 host->flags &= ~SDHCI_SIGNALING_330;
599 host->flags |= SDHCI_SIGNALING_180;
600 host->mmc->caps2 |= MMC_CAP2_NO_SD;
601 host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
602 pci_write_config_dword(chip->pdev,
603 O2_SD_DETECT_SETTING, 3);
604 }
605
606 slot->host->mmc_host_ops.get_cd = sdhci_o2_get_cd;
607 }
608
609 if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD1) {
610 slot->host->mmc_host_ops.get_cd = sdhci_o2_get_cd;
611 host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
612 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
613 }
614
615 host->mmc_host_ops.execute_tuning = sdhci_o2_execute_tuning;
616
617 if (chip->pdev->device != PCI_DEVICE_ID_O2_FUJIN2)
618 break;
619 /* set dll watch dog timer */
620 reg = sdhci_readl(host, O2_SD_VENDOR_SETTING2);
621 reg |= (1 << 12);
622 sdhci_writel(host, reg, O2_SD_VENDOR_SETTING2);
623
624 break;
625 default:
626 break;
627 }
628
629 return 0;
630}
631
632static int sdhci_pci_o2_probe(struct sdhci_pci_chip *chip)
633{
634 int ret;
635 u8 scratch;
636 u32 scratch_32;
637
638 switch (chip->pdev->device) {
639 case PCI_DEVICE_ID_O2_8220:
640 case PCI_DEVICE_ID_O2_8221:
641 case PCI_DEVICE_ID_O2_8320:
642 case PCI_DEVICE_ID_O2_8321:
643 /* This extra setup is required due to broken ADMA. */
644 ret = pci_read_config_byte(chip->pdev,
645 O2_SD_LOCK_WP, &scratch);
646 if (ret)
647 return ret;
648 scratch &= 0x7f;
649 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
650
651 /* Set Multi 3 to VCC3V# */
652 pci_write_config_byte(chip->pdev, O2_SD_MULTI_VCC3V, 0x08);
653
654 /* Disable CLK_REQ# support after media DET */
655 ret = pci_read_config_byte(chip->pdev,
656 O2_SD_CLKREQ, &scratch);
657 if (ret)
658 return ret;
659 scratch |= 0x20;
660 pci_write_config_byte(chip->pdev, O2_SD_CLKREQ, scratch);
661
662 /* Choose capabilities, enable SDMA. We have to write 0x01
663 * to the capabilities register first to unlock it.
664 */
665 ret = pci_read_config_byte(chip->pdev, O2_SD_CAPS, &scratch);
666 if (ret)
667 return ret;
668 scratch |= 0x01;
669 pci_write_config_byte(chip->pdev, O2_SD_CAPS, scratch);
670 pci_write_config_byte(chip->pdev, O2_SD_CAPS, 0x73);
671
672 /* Disable ADMA1/2 */
673 pci_write_config_byte(chip->pdev, O2_SD_ADMA1, 0x39);
674 pci_write_config_byte(chip->pdev, O2_SD_ADMA2, 0x08);
675
676 /* Disable the infinite transfer mode */
677 ret = pci_read_config_byte(chip->pdev,
678 O2_SD_INF_MOD, &scratch);
679 if (ret)
680 return ret;
681 scratch |= 0x08;
682 pci_write_config_byte(chip->pdev, O2_SD_INF_MOD, scratch);
683
684 /* Lock WP */
685 ret = pci_read_config_byte(chip->pdev,
686 O2_SD_LOCK_WP, &scratch);
687 if (ret)
688 return ret;
689 scratch |= 0x80;
690 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
691 break;
692 case PCI_DEVICE_ID_O2_SDS0:
693 case PCI_DEVICE_ID_O2_SDS1:
694 case PCI_DEVICE_ID_O2_FUJIN2:
695 /* UnLock WP */
696 ret = pci_read_config_byte(chip->pdev,
697 O2_SD_LOCK_WP, &scratch);
698 if (ret)
699 return ret;
700
701 scratch &= 0x7f;
702 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
703
704 /* DevId=8520 subId= 0x11 or 0x12 Type Chip support */
705 if (chip->pdev->device == PCI_DEVICE_ID_O2_FUJIN2) {
706 ret = pci_read_config_dword(chip->pdev,
707 O2_SD_FUNC_REG0,
708 &scratch_32);
709 if (ret)
710 return ret;
711 scratch_32 = ((scratch_32 & 0xFF000000) >> 24);
712
713 /* Check Whether subId is 0x11 or 0x12 */
714 if ((scratch_32 == 0x11) || (scratch_32 == 0x12)) {
715 scratch_32 = 0x25100000;
716
717 o2_pci_set_baseclk(chip, scratch_32);
718 ret = pci_read_config_dword(chip->pdev,
719 O2_SD_FUNC_REG4,
720 &scratch_32);
721 if (ret)
722 return ret;
723
724 /* Enable Base Clk setting change */
725 scratch_32 |= O2_SD_FREG4_ENABLE_CLK_SET;
726 pci_write_config_dword(chip->pdev,
727 O2_SD_FUNC_REG4,
728 scratch_32);
729
730 /* Set Tuning Window to 4 */
731 pci_write_config_byte(chip->pdev,
732 O2_SD_TUNING_CTRL, 0x44);
733
734 break;
735 }
736 }
737
738 /* Enable 8520 led function */
739 o2_pci_led_enable(chip);
740
741 /* Set timeout CLK */
742 ret = pci_read_config_dword(chip->pdev,
743 O2_SD_CLK_SETTING, &scratch_32);
744 if (ret)
745 return ret;
746
747 scratch_32 &= ~(0xFF00);
748 scratch_32 |= 0x07E0C800;
749 pci_write_config_dword(chip->pdev,
750 O2_SD_CLK_SETTING, scratch_32);
751
752 ret = pci_read_config_dword(chip->pdev,
753 O2_SD_CLKREQ, &scratch_32);
754 if (ret)
755 return ret;
756 scratch_32 |= 0x3;
757 pci_write_config_dword(chip->pdev, O2_SD_CLKREQ, scratch_32);
758
759 ret = pci_read_config_dword(chip->pdev,
760 O2_SD_PLL_SETTING, &scratch_32);
761 if (ret)
762 return ret;
763
764 scratch_32 &= ~(0x1F3F070E);
765 scratch_32 |= 0x18270106;
766 pci_write_config_dword(chip->pdev,
767 O2_SD_PLL_SETTING, scratch_32);
768
769 /* Disable UHS1 funciton */
770 ret = pci_read_config_dword(chip->pdev,
771 O2_SD_CAP_REG2, &scratch_32);
772 if (ret)
773 return ret;
774 scratch_32 &= ~(0xE0);
775 pci_write_config_dword(chip->pdev,
776 O2_SD_CAP_REG2, scratch_32);
777
778 if (chip->pdev->device == PCI_DEVICE_ID_O2_FUJIN2)
779 sdhci_pci_o2_fujin2_pci_init(chip);
780
781 /* Lock WP */
782 ret = pci_read_config_byte(chip->pdev,
783 O2_SD_LOCK_WP, &scratch);
784 if (ret)
785 return ret;
786 scratch |= 0x80;
787 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
788 break;
789 case PCI_DEVICE_ID_O2_SEABIRD0:
790 case PCI_DEVICE_ID_O2_SEABIRD1:
791 /* UnLock WP */
792 ret = pci_read_config_byte(chip->pdev,
793 O2_SD_LOCK_WP, &scratch);
794 if (ret)
795 return ret;
796
797 scratch &= 0x7f;
798 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
799
800 ret = pci_read_config_dword(chip->pdev,
801 O2_SD_PLL_SETTING, &scratch_32);
802 if (ret)
803 return ret;
804
805 if ((scratch_32 & 0xff000000) == 0x01000000) {
806 scratch_32 &= 0x0000FFFF;
807 scratch_32 |= 0x1F340000;
808
809 pci_write_config_dword(chip->pdev,
810 O2_SD_PLL_SETTING, scratch_32);
811 } else {
812 scratch_32 &= 0x0000FFFF;
813 scratch_32 |= 0x25100000;
814
815 pci_write_config_dword(chip->pdev,
816 O2_SD_PLL_SETTING, scratch_32);
817
818 ret = pci_read_config_dword(chip->pdev,
819 O2_SD_FUNC_REG4,
820 &scratch_32);
821 if (ret)
822 return ret;
823 scratch_32 |= (1 << 22);
824 pci_write_config_dword(chip->pdev,
825 O2_SD_FUNC_REG4, scratch_32);
826 }
827
828 /* Set Tuning Windows to 5 */
829 pci_write_config_byte(chip->pdev,
830 O2_SD_TUNING_CTRL, 0x55);
831 /* Lock WP */
832 ret = pci_read_config_byte(chip->pdev,
833 O2_SD_LOCK_WP, &scratch);
834 if (ret)
835 return ret;
836 scratch |= 0x80;
837 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
838 break;
839 }
840
841 return 0;
842}
843
844#ifdef CONFIG_PM_SLEEP
845static int sdhci_pci_o2_resume(struct sdhci_pci_chip *chip)
846{
847 sdhci_pci_o2_probe(chip);
848 return sdhci_pci_resume_host(chip);
849}
850#endif
851
852static const struct sdhci_ops sdhci_pci_o2_ops = {
853 .set_clock = sdhci_pci_o2_set_clock,
854 .enable_dma = sdhci_pci_enable_dma,
855 .set_bus_width = sdhci_set_bus_width,
856 .reset = sdhci_reset,
857 .set_uhs_signaling = sdhci_set_uhs_signaling,
858};
859
860const struct sdhci_pci_fixes sdhci_o2 = {
861 .probe = sdhci_pci_o2_probe,
862 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
863 .quirks2 = SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD,
864 .probe_slot = sdhci_pci_o2_probe_slot,
865#ifdef CONFIG_PM_SLEEP
866 .resume = sdhci_pci_o2_resume,
867#endif
868 .ops = &sdhci_pci_o2_ops,
869 .priv_size = sizeof(struct o2_host),
870};