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
76 static const u32 dmdn_table[] = {0x2B1C0000,
77 0x2C1A0000, 0x371B0000, 0x35100000};
78 #define DMDN_SZ ARRAY_SIZE(dmdn_table)
79
80 struct o2_host {
81 u8 dll_adjust_count;
82 };
83
sdhci_o2_wait_card_detect_stable(struct sdhci_host * host)84 static 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
sdhci_o2_enable_internal_clock(struct sdhci_host * host)109 static 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
148 out:
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
sdhci_o2_get_cd(struct mmc_host * mmc)155 static 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
o2_pci_set_baseclk(struct sdhci_pci_chip * chip,u32 value)167 static 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
sdhci_o2_pll_dll_wdt_control(struct sdhci_host * host)181 static 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 */
sdhci_o2_wait_dll_detect_lock(struct sdhci_host * host)192 static 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
sdhci_o2_set_tuning_mode(struct sdhci_host * host)200 static 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
__sdhci_o2_execute_tuning(struct sdhci_host * host,u32 opcode)210 static 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 */
sdhci_o2_dll_recovery(struct sdhci_host * host)244 static 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
sdhci_o2_execute_tuning(struct mmc_host * mmc,u32 opcode)314 static 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
o2_pci_led_enable(struct sdhci_pci_chip * chip)431 static 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
sdhci_pci_o2_fujin2_pci_init(struct sdhci_pci_chip * chip)456 static 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
sdhci_pci_o2_enable_msi(struct sdhci_pci_chip * chip,struct sdhci_host * host)542 static 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
sdhci_o2_enable_clk(struct sdhci_host * host,u16 clk)565 static 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
sdhci_pci_o2_set_clock(struct sdhci_host * host,unsigned int clock)578 static 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
sdhci_pci_o2_init_sd_express(struct mmc_host * mmc,struct mmc_ios * ios)635 static 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
sdhci_pci_o2_probe_slot(struct sdhci_pci_slot * slot)696 static int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot)
697 {
698 struct sdhci_pci_chip *chip;
699 struct sdhci_host *host;
700 struct o2_host *o2_host = sdhci_pci_priv(slot);
701 u32 reg, caps;
702 int ret;
703
704 chip = slot->chip;
705 host = slot->host;
706
707 o2_host->dll_adjust_count = 0;
708 caps = sdhci_readl(host, SDHCI_CAPABILITIES);
709
710 /*
711 * mmc_select_bus_width() will test the bus to determine the actual bus
712 * width.
713 */
714 if (caps & SDHCI_CAN_DO_8BIT)
715 host->mmc->caps |= MMC_CAP_8_BIT_DATA;
716
717 host->quirks2 |= SDHCI_QUIRK2_BROKEN_DDR50;
718
719 sdhci_pci_o2_enable_msi(chip, host);
720
721 host->mmc_host_ops.execute_tuning = sdhci_o2_execute_tuning;
722 switch (chip->pdev->device) {
723 case PCI_DEVICE_ID_O2_SDS0:
724 case PCI_DEVICE_ID_O2_SEABIRD0:
725 case PCI_DEVICE_ID_O2_SEABIRD1:
726 case PCI_DEVICE_ID_O2_SDS1:
727 case PCI_DEVICE_ID_O2_FUJIN2:
728 reg = sdhci_readl(host, O2_SD_VENDOR_SETTING);
729 if (reg & 0x1)
730 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
731
732 if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD0) {
733 ret = pci_read_config_dword(chip->pdev,
734 O2_SD_MISC_SETTING, ®);
735 if (ret)
736 return -EIO;
737 if (reg & (1 << 4)) {
738 pr_info("%s: emmc 1.8v flag is set, force 1.8v signaling voltage\n",
739 mmc_hostname(host->mmc));
740 host->flags &= ~SDHCI_SIGNALING_330;
741 host->flags |= SDHCI_SIGNALING_180;
742 host->mmc->caps2 |= MMC_CAP2_NO_SD;
743 host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
744 pci_write_config_dword(chip->pdev,
745 O2_SD_DETECT_SETTING, 3);
746 }
747
748 slot->host->mmc_host_ops.get_cd = sdhci_o2_get_cd;
749 }
750
751 if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD1) {
752 slot->host->mmc_host_ops.get_cd = sdhci_o2_get_cd;
753 host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
754 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
755 }
756
757 if (chip->pdev->device != PCI_DEVICE_ID_O2_FUJIN2)
758 break;
759 /* set dll watch dog timer */
760 reg = sdhci_readl(host, O2_SD_VENDOR_SETTING2);
761 reg |= (1 << 12);
762 sdhci_writel(host, reg, O2_SD_VENDOR_SETTING2);
763 break;
764 case PCI_DEVICE_ID_O2_GG8_9860:
765 case PCI_DEVICE_ID_O2_GG8_9861:
766 case PCI_DEVICE_ID_O2_GG8_9862:
767 case PCI_DEVICE_ID_O2_GG8_9863:
768 host->mmc->caps2 |= MMC_CAP2_NO_SDIO | MMC_CAP2_SD_EXP | MMC_CAP2_SD_EXP_1_2V;
769 host->mmc->caps |= MMC_CAP_HW_RESET;
770 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
771 slot->host->mmc_host_ops.get_cd = sdhci_o2_get_cd;
772 host->mmc_host_ops.init_sd_express = sdhci_pci_o2_init_sd_express;
773 break;
774 default:
775 break;
776 }
777
778 return 0;
779 }
780
sdhci_pci_o2_probe(struct sdhci_pci_chip * chip)781 static int sdhci_pci_o2_probe(struct sdhci_pci_chip *chip)
782 {
783 int ret;
784 u8 scratch;
785 u16 scratch16;
786 u32 scratch_32;
787
788 switch (chip->pdev->device) {
789 case PCI_DEVICE_ID_O2_8220:
790 case PCI_DEVICE_ID_O2_8221:
791 case PCI_DEVICE_ID_O2_8320:
792 case PCI_DEVICE_ID_O2_8321:
793 /* This extra setup is required due to broken ADMA. */
794 ret = pci_read_config_byte(chip->pdev,
795 O2_SD_LOCK_WP, &scratch);
796 if (ret)
797 return ret;
798 scratch &= 0x7f;
799 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
800
801 /* Set Multi 3 to VCC3V# */
802 pci_write_config_byte(chip->pdev, O2_SD_MULTI_VCC3V, 0x08);
803
804 /* Disable CLK_REQ# support after media DET */
805 ret = pci_read_config_byte(chip->pdev,
806 O2_SD_CLKREQ, &scratch);
807 if (ret)
808 return ret;
809 scratch |= 0x20;
810 pci_write_config_byte(chip->pdev, O2_SD_CLKREQ, scratch);
811
812 /* Choose capabilities, enable SDMA. We have to write 0x01
813 * to the capabilities register first to unlock it.
814 */
815 ret = pci_read_config_byte(chip->pdev, O2_SD_CAPS, &scratch);
816 if (ret)
817 return ret;
818 scratch |= 0x01;
819 pci_write_config_byte(chip->pdev, O2_SD_CAPS, scratch);
820 pci_write_config_byte(chip->pdev, O2_SD_CAPS, 0x73);
821
822 /* Disable ADMA1/2 */
823 pci_write_config_byte(chip->pdev, O2_SD_ADMA1, 0x39);
824 pci_write_config_byte(chip->pdev, O2_SD_ADMA2, 0x08);
825
826 /* Disable the infinite transfer mode */
827 ret = pci_read_config_byte(chip->pdev,
828 O2_SD_INF_MOD, &scratch);
829 if (ret)
830 return ret;
831 scratch |= 0x08;
832 pci_write_config_byte(chip->pdev, O2_SD_INF_MOD, scratch);
833
834 /* Lock WP */
835 ret = pci_read_config_byte(chip->pdev,
836 O2_SD_LOCK_WP, &scratch);
837 if (ret)
838 return ret;
839 scratch |= 0x80;
840 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
841 break;
842 case PCI_DEVICE_ID_O2_SDS0:
843 case PCI_DEVICE_ID_O2_SDS1:
844 case PCI_DEVICE_ID_O2_FUJIN2:
845 /* UnLock WP */
846 ret = pci_read_config_byte(chip->pdev,
847 O2_SD_LOCK_WP, &scratch);
848 if (ret)
849 return ret;
850
851 scratch &= 0x7f;
852 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
853
854 /* DevId=8520 subId= 0x11 or 0x12 Type Chip support */
855 if (chip->pdev->device == PCI_DEVICE_ID_O2_FUJIN2) {
856 ret = pci_read_config_dword(chip->pdev,
857 O2_SD_FUNC_REG0,
858 &scratch_32);
859 if (ret)
860 return ret;
861 scratch_32 = ((scratch_32 & 0xFF000000) >> 24);
862
863 /* Check Whether subId is 0x11 or 0x12 */
864 if ((scratch_32 == 0x11) || (scratch_32 == 0x12)) {
865 scratch_32 = 0x25100000;
866
867 o2_pci_set_baseclk(chip, scratch_32);
868 ret = pci_read_config_dword(chip->pdev,
869 O2_SD_FUNC_REG4,
870 &scratch_32);
871 if (ret)
872 return ret;
873
874 /* Enable Base Clk setting change */
875 scratch_32 |= O2_SD_FREG4_ENABLE_CLK_SET;
876 pci_write_config_dword(chip->pdev,
877 O2_SD_FUNC_REG4,
878 scratch_32);
879
880 /* Set Tuning Window to 4 */
881 pci_write_config_byte(chip->pdev,
882 O2_SD_TUNING_CTRL, 0x44);
883
884 break;
885 }
886 }
887
888 /* Enable 8520 led function */
889 o2_pci_led_enable(chip);
890
891 /* Set timeout CLK */
892 ret = pci_read_config_dword(chip->pdev,
893 O2_SD_CLK_SETTING, &scratch_32);
894 if (ret)
895 return ret;
896
897 scratch_32 &= ~(0xFF00);
898 scratch_32 |= 0x07E0C800;
899 pci_write_config_dword(chip->pdev,
900 O2_SD_CLK_SETTING, scratch_32);
901
902 ret = pci_read_config_dword(chip->pdev,
903 O2_SD_CLKREQ, &scratch_32);
904 if (ret)
905 return ret;
906 scratch_32 |= 0x3;
907 pci_write_config_dword(chip->pdev, O2_SD_CLKREQ, scratch_32);
908
909 ret = pci_read_config_dword(chip->pdev,
910 O2_SD_PLL_SETTING, &scratch_32);
911 if (ret)
912 return ret;
913
914 scratch_32 &= ~(0x1F3F070E);
915 scratch_32 |= 0x18270106;
916 pci_write_config_dword(chip->pdev,
917 O2_SD_PLL_SETTING, scratch_32);
918
919 /* Disable UHS1 funciton */
920 ret = pci_read_config_dword(chip->pdev,
921 O2_SD_CAP_REG2, &scratch_32);
922 if (ret)
923 return ret;
924 scratch_32 &= ~(0xE0);
925 pci_write_config_dword(chip->pdev,
926 O2_SD_CAP_REG2, scratch_32);
927
928 if (chip->pdev->device == PCI_DEVICE_ID_O2_FUJIN2)
929 sdhci_pci_o2_fujin2_pci_init(chip);
930
931 /* Lock WP */
932 ret = pci_read_config_byte(chip->pdev,
933 O2_SD_LOCK_WP, &scratch);
934 if (ret)
935 return ret;
936 scratch |= 0x80;
937 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
938 break;
939 case PCI_DEVICE_ID_O2_SEABIRD0:
940 case PCI_DEVICE_ID_O2_SEABIRD1:
941 /* UnLock WP */
942 ret = pci_read_config_byte(chip->pdev,
943 O2_SD_LOCK_WP, &scratch);
944 if (ret)
945 return ret;
946
947 scratch &= 0x7f;
948 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
949
950 ret = pci_read_config_dword(chip->pdev,
951 O2_SD_PLL_SETTING, &scratch_32);
952 if (ret)
953 return ret;
954
955 if ((scratch_32 & 0xff000000) == 0x01000000) {
956 scratch_32 &= 0x0000FFFF;
957 scratch_32 |= 0x1F340000;
958
959 pci_write_config_dword(chip->pdev,
960 O2_SD_PLL_SETTING, scratch_32);
961 } else {
962 scratch_32 &= 0x0000FFFF;
963 scratch_32 |= 0x25100000;
964
965 pci_write_config_dword(chip->pdev,
966 O2_SD_PLL_SETTING, scratch_32);
967
968 ret = pci_read_config_dword(chip->pdev,
969 O2_SD_FUNC_REG4,
970 &scratch_32);
971 if (ret)
972 return ret;
973 scratch_32 |= (1 << 22);
974 pci_write_config_dword(chip->pdev,
975 O2_SD_FUNC_REG4, scratch_32);
976 }
977
978 /* Set Tuning Windows to 5 */
979 pci_write_config_byte(chip->pdev,
980 O2_SD_TUNING_CTRL, 0x55);
981 //Adjust 1st and 2nd CD debounce time
982 pci_read_config_dword(chip->pdev, O2_SD_MISC_CTRL2, &scratch_32);
983 scratch_32 &= 0xFFE7FFFF;
984 scratch_32 |= 0x00180000;
985 pci_write_config_dword(chip->pdev, O2_SD_MISC_CTRL2, scratch_32);
986 pci_write_config_dword(chip->pdev, O2_SD_DETECT_SETTING, 1);
987 /* Lock WP */
988 ret = pci_read_config_byte(chip->pdev,
989 O2_SD_LOCK_WP, &scratch);
990 if (ret)
991 return ret;
992 scratch |= 0x80;
993 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
994 break;
995 case PCI_DEVICE_ID_O2_GG8_9860:
996 case PCI_DEVICE_ID_O2_GG8_9861:
997 case PCI_DEVICE_ID_O2_GG8_9862:
998 case PCI_DEVICE_ID_O2_GG8_9863:
999 /* UnLock WP */
1000 ret = pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
1001 if (ret)
1002 return ret;
1003 scratch &= 0x7f;
1004 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
1005
1006 /* Select mode switch source as software control */
1007 pci_read_config_word(chip->pdev, O2_SD_PARA_SET_REG1, &scratch16);
1008 scratch16 &= 0xF8FF;
1009 scratch16 |= BIT(9);
1010 pci_write_config_word(chip->pdev, O2_SD_PARA_SET_REG1, scratch16);
1011
1012 /* set VDD1 supply source */
1013 pci_read_config_word(chip->pdev, O2_SD_VDDX_CTRL_REG, &scratch16);
1014 scratch16 &= 0xFFE3;
1015 scratch16 |= BIT(3);
1016 pci_write_config_word(chip->pdev, O2_SD_VDDX_CTRL_REG, scratch16);
1017
1018 /* Set host drive strength*/
1019 scratch16 = 0x0025;
1020 pci_write_config_word(chip->pdev, O2_SD_PLL_SETTING, scratch16);
1021
1022 /* Set output delay*/
1023 pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, &scratch_32);
1024 scratch_32 &= 0xFF0FFF00;
1025 scratch_32 |= 0x00B0003B;
1026 pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, scratch_32);
1027
1028 /* Lock WP */
1029 ret = pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
1030 if (ret)
1031 return ret;
1032 scratch |= 0x80;
1033 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
1034 break;
1035 }
1036
1037 return 0;
1038 }
1039
1040 #ifdef CONFIG_PM_SLEEP
sdhci_pci_o2_resume(struct sdhci_pci_chip * chip)1041 static int sdhci_pci_o2_resume(struct sdhci_pci_chip *chip)
1042 {
1043 sdhci_pci_o2_probe(chip);
1044 return sdhci_pci_resume_host(chip);
1045 }
1046 #endif
1047
1048 static const struct sdhci_ops sdhci_pci_o2_ops = {
1049 .set_clock = sdhci_pci_o2_set_clock,
1050 .enable_dma = sdhci_pci_enable_dma,
1051 .set_bus_width = sdhci_set_bus_width,
1052 .reset = sdhci_reset,
1053 .set_uhs_signaling = sdhci_set_uhs_signaling,
1054 };
1055
1056 const struct sdhci_pci_fixes sdhci_o2 = {
1057 .probe = sdhci_pci_o2_probe,
1058 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
1059 .quirks2 = SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD,
1060 .probe_slot = sdhci_pci_o2_probe_slot,
1061 #ifdef CONFIG_PM_SLEEP
1062 .resume = sdhci_pci_o2_resume,
1063 #endif
1064 .ops = &sdhci_pci_o2_ops,
1065 .priv_size = sizeof(struct o2_host),
1066 };
1067
