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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics 2018 - All Rights Reserved
4 * Author: Ludovic.barre@st.com for STMicroelectronics.
5 */
6#include <linux/bitfield.h>
7#include <linux/delay.h>
8#include <linux/dma-mapping.h>
9#include <linux/iopoll.h>
10#include <linux/mmc/host.h>
11#include <linux/mmc/card.h>
12#include <linux/of_address.h>
13#include <linux/reset.h>
14#include <linux/scatterlist.h>
15#include "mmci.h"
16
17#define SDMMC_LLI_BUF_LEN PAGE_SIZE
18#define SDMMC_IDMA_BURST BIT(MMCI_STM32_IDMABNDT_SHIFT)
19
20#define DLYB_CR 0x0
21#define DLYB_CR_DEN BIT(0)
22#define DLYB_CR_SEN BIT(1)
23
24#define DLYB_CFGR 0x4
25#define DLYB_CFGR_SEL_MASK GENMASK(3, 0)
26#define DLYB_CFGR_UNIT_MASK GENMASK(14, 8)
27#define DLYB_CFGR_LNG_MASK GENMASK(27, 16)
28#define DLYB_CFGR_LNGF BIT(31)
29
30#define DLYB_NB_DELAY 11
31#define DLYB_CFGR_SEL_MAX (DLYB_NB_DELAY + 1)
32#define DLYB_CFGR_UNIT_MAX 127
33
34#define DLYB_LNG_TIMEOUT_US 1000
35#define SDMMC_VSWEND_TIMEOUT_US 10000
36
37struct sdmmc_lli_desc {
38 u32 idmalar;
39 u32 idmabase;
40 u32 idmasize;
41};
42
43struct sdmmc_idma {
44 dma_addr_t sg_dma;
45 void *sg_cpu;
46 dma_addr_t bounce_dma_addr;
47 void *bounce_buf;
48 bool use_bounce_buffer;
49};
50
51struct sdmmc_dlyb {
52 void __iomem *base;
53 u32 unit;
54 u32 max;
55};
56
57static int sdmmc_idma_validate_data(struct mmci_host *host,
58 struct mmc_data *data)
59{
60 struct sdmmc_idma *idma = host->dma_priv;
61 struct device *dev = mmc_dev(host->mmc);
62 struct scatterlist *sg;
63 int i;
64
65 /*
66 * idma has constraints on idmabase & idmasize for each element
67 * excepted the last element which has no constraint on idmasize
68 */
69 idma->use_bounce_buffer = false;
70 for_each_sg(data->sg, sg, data->sg_len - 1, i) {
71 if (!IS_ALIGNED(sg->offset, sizeof(u32)) ||
72 !IS_ALIGNED(sg->length, SDMMC_IDMA_BURST)) {
73 dev_dbg(mmc_dev(host->mmc),
74 "unaligned scatterlist: ofst:%x length:%d\n",
75 data->sg->offset, data->sg->length);
76 goto use_bounce_buffer;
77 }
78 }
79
80 if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
81 dev_dbg(mmc_dev(host->mmc),
82 "unaligned last scatterlist: ofst:%x length:%d\n",
83 data->sg->offset, data->sg->length);
84 goto use_bounce_buffer;
85 }
86
87 return 0;
88
89use_bounce_buffer:
90 if (!idma->bounce_buf) {
91 idma->bounce_buf = dmam_alloc_coherent(dev,
92 host->mmc->max_req_size,
93 &idma->bounce_dma_addr,
94 GFP_KERNEL);
95 if (!idma->bounce_buf) {
96 dev_err(dev, "Unable to map allocate DMA bounce buffer.\n");
97 return -ENOMEM;
98 }
99 }
100
101 idma->use_bounce_buffer = true;
102
103 return 0;
104}
105
106static int _sdmmc_idma_prep_data(struct mmci_host *host,
107 struct mmc_data *data)
108{
109 struct sdmmc_idma *idma = host->dma_priv;
110
111 if (idma->use_bounce_buffer) {
112 if (data->flags & MMC_DATA_WRITE) {
113 unsigned int xfer_bytes = data->blksz * data->blocks;
114
115 sg_copy_to_buffer(data->sg, data->sg_len,
116 idma->bounce_buf, xfer_bytes);
117 dma_wmb();
118 }
119 } else {
120 int n_elem;
121
122 n_elem = dma_map_sg(mmc_dev(host->mmc),
123 data->sg,
124 data->sg_len,
125 mmc_get_dma_dir(data));
126
127 if (!n_elem) {
128 dev_err(mmc_dev(host->mmc), "dma_map_sg failed\n");
129 return -EINVAL;
130 }
131 }
132 return 0;
133}
134
135static int sdmmc_idma_prep_data(struct mmci_host *host,
136 struct mmc_data *data, bool next)
137{
138 /* Check if job is already prepared. */
139 if (!next && data->host_cookie == host->next_cookie)
140 return 0;
141
142 return _sdmmc_idma_prep_data(host, data);
143}
144
145static void sdmmc_idma_unprep_data(struct mmci_host *host,
146 struct mmc_data *data, int err)
147{
148 struct sdmmc_idma *idma = host->dma_priv;
149
150 if (idma->use_bounce_buffer) {
151 if (data->flags & MMC_DATA_READ) {
152 unsigned int xfer_bytes = data->blksz * data->blocks;
153
154 sg_copy_from_buffer(data->sg, data->sg_len,
155 idma->bounce_buf, xfer_bytes);
156 }
157 } else {
158 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
159 mmc_get_dma_dir(data));
160 }
161}
162
163static int sdmmc_idma_setup(struct mmci_host *host)
164{
165 struct sdmmc_idma *idma;
166 struct device *dev = mmc_dev(host->mmc);
167
168 idma = devm_kzalloc(dev, sizeof(*idma), GFP_KERNEL);
169 if (!idma)
170 return -ENOMEM;
171
172 host->dma_priv = idma;
173
174 if (host->variant->dma_lli) {
175 idma->sg_cpu = dmam_alloc_coherent(dev, SDMMC_LLI_BUF_LEN,
176 &idma->sg_dma, GFP_KERNEL);
177 if (!idma->sg_cpu) {
178 dev_err(dev, "Failed to alloc IDMA descriptor\n");
179 return -ENOMEM;
180 }
181 host->mmc->max_segs = SDMMC_LLI_BUF_LEN /
182 sizeof(struct sdmmc_lli_desc);
183 host->mmc->max_seg_size = host->variant->stm32_idmabsize_mask;
184
185 host->mmc->max_req_size = SZ_1M;
186 } else {
187 host->mmc->max_segs = 1;
188 host->mmc->max_seg_size = host->mmc->max_req_size;
189 }
190
191 return dma_set_max_seg_size(dev, host->mmc->max_seg_size);
192}
193
194static int sdmmc_idma_start(struct mmci_host *host, unsigned int *datactrl)
195
196{
197 struct sdmmc_idma *idma = host->dma_priv;
198 struct sdmmc_lli_desc *desc = (struct sdmmc_lli_desc *)idma->sg_cpu;
199 struct mmc_data *data = host->data;
200 struct scatterlist *sg;
201 int i;
202
203 if (!host->variant->dma_lli || data->sg_len == 1 ||
204 idma->use_bounce_buffer) {
205 u32 dma_addr;
206
207 if (idma->use_bounce_buffer)
208 dma_addr = idma->bounce_dma_addr;
209 else
210 dma_addr = sg_dma_address(data->sg);
211
212 writel_relaxed(dma_addr,
213 host->base + MMCI_STM32_IDMABASE0R);
214 writel_relaxed(MMCI_STM32_IDMAEN,
215 host->base + MMCI_STM32_IDMACTRLR);
216 return 0;
217 }
218
219 for_each_sg(data->sg, sg, data->sg_len, i) {
220 desc[i].idmalar = (i + 1) * sizeof(struct sdmmc_lli_desc);
221 desc[i].idmalar |= MMCI_STM32_ULA | MMCI_STM32_ULS
222 | MMCI_STM32_ABR;
223 desc[i].idmabase = sg_dma_address(sg);
224 desc[i].idmasize = sg_dma_len(sg);
225 }
226
227 /* notice the end of link list */
228 desc[data->sg_len - 1].idmalar &= ~MMCI_STM32_ULA;
229
230 dma_wmb();
231 writel_relaxed(idma->sg_dma, host->base + MMCI_STM32_IDMABAR);
232 writel_relaxed(desc[0].idmalar, host->base + MMCI_STM32_IDMALAR);
233 writel_relaxed(desc[0].idmabase, host->base + MMCI_STM32_IDMABASE0R);
234 writel_relaxed(desc[0].idmasize, host->base + MMCI_STM32_IDMABSIZER);
235 writel_relaxed(MMCI_STM32_IDMAEN | MMCI_STM32_IDMALLIEN,
236 host->base + MMCI_STM32_IDMACTRLR);
237
238 return 0;
239}
240
241static void sdmmc_idma_finalize(struct mmci_host *host, struct mmc_data *data)
242{
243 writel_relaxed(0, host->base + MMCI_STM32_IDMACTRLR);
244
245 if (!data->host_cookie)
246 sdmmc_idma_unprep_data(host, data, 0);
247}
248
249static void mmci_sdmmc_set_clkreg(struct mmci_host *host, unsigned int desired)
250{
251 unsigned int clk = 0, ddr = 0;
252
253 if (host->mmc->ios.timing == MMC_TIMING_MMC_DDR52 ||
254 host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
255 ddr = MCI_STM32_CLK_DDR;
256
257 /*
258 * cclk = mclk / (2 * clkdiv)
259 * clkdiv 0 => bypass
260 * in ddr mode bypass is not possible
261 */
262 if (desired) {
263 if (desired >= host->mclk && !ddr) {
264 host->cclk = host->mclk;
265 } else {
266 clk = DIV_ROUND_UP(host->mclk, 2 * desired);
267 if (clk > MCI_STM32_CLK_CLKDIV_MSK)
268 clk = MCI_STM32_CLK_CLKDIV_MSK;
269 host->cclk = host->mclk / (2 * clk);
270 }
271 } else {
272 /*
273 * while power-on phase the clock can't be define to 0,
274 * Only power-off and power-cyc deactivate the clock.
275 * if desired clock is 0, set max divider
276 */
277 clk = MCI_STM32_CLK_CLKDIV_MSK;
278 host->cclk = host->mclk / (2 * clk);
279 }
280
281 /* Set actual clock for debug */
282 if (host->mmc->ios.power_mode == MMC_POWER_ON)
283 host->mmc->actual_clock = host->cclk;
284 else
285 host->mmc->actual_clock = 0;
286
287 if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4)
288 clk |= MCI_STM32_CLK_WIDEBUS_4;
289 if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8)
290 clk |= MCI_STM32_CLK_WIDEBUS_8;
291
292 clk |= MCI_STM32_CLK_HWFCEN;
293 clk |= host->clk_reg_add;
294 clk |= ddr;
295
296 /*
297 * SDMMC_FBCK is selected when an external Delay Block is needed
298 * with SDR104 or HS200.
299 */
300 if (host->mmc->ios.timing >= MMC_TIMING_UHS_SDR50) {
301 clk |= MCI_STM32_CLK_BUSSPEED;
302 if (host->mmc->ios.timing == MMC_TIMING_UHS_SDR104 ||
303 host->mmc->ios.timing == MMC_TIMING_MMC_HS200) {
304 clk &= ~MCI_STM32_CLK_SEL_MSK;
305 clk |= MCI_STM32_CLK_SELFBCK;
306 }
307 }
308
309 mmci_write_clkreg(host, clk);
310}
311
312static void sdmmc_dlyb_input_ck(struct sdmmc_dlyb *dlyb)
313{
314 if (!dlyb || !dlyb->base)
315 return;
316
317 /* Output clock = Input clock */
318 writel_relaxed(0, dlyb->base + DLYB_CR);
319}
320
321static void mmci_sdmmc_set_pwrreg(struct mmci_host *host, unsigned int pwr)
322{
323 struct mmc_ios ios = host->mmc->ios;
324 struct sdmmc_dlyb *dlyb = host->variant_priv;
325
326 /* adds OF options */
327 pwr = host->pwr_reg_add;
328
329 sdmmc_dlyb_input_ck(dlyb);
330
331 if (ios.power_mode == MMC_POWER_OFF) {
332 /* Only a reset could power-off sdmmc */
333 reset_control_assert(host->rst);
334 udelay(2);
335 reset_control_deassert(host->rst);
336
337 /*
338 * Set the SDMMC in Power-cycle state.
339 * This will make that the SDMMC_D[7:0], SDMMC_CMD and SDMMC_CK
340 * are driven low, to prevent the Card from being supplied
341 * through the signal lines.
342 */
343 mmci_write_pwrreg(host, MCI_STM32_PWR_CYC | pwr);
344 } else if (ios.power_mode == MMC_POWER_ON) {
345 /*
346 * After power-off (reset): the irq mask defined in probe
347 * functionis lost
348 * ault irq mask (probe) must be activated
349 */
350 writel(MCI_IRQENABLE | host->variant->start_err,
351 host->base + MMCIMASK0);
352
353 /* preserves voltage switch bits */
354 pwr |= host->pwr_reg & (MCI_STM32_VSWITCHEN |
355 MCI_STM32_VSWITCH);
356
357 /*
358 * After a power-cycle state, we must set the SDMMC in
359 * Power-off. The SDMMC_D[7:0], SDMMC_CMD and SDMMC_CK are
360 * driven high. Then we can set the SDMMC to Power-on state
361 */
362 mmci_write_pwrreg(host, MCI_PWR_OFF | pwr);
363 mdelay(1);
364 mmci_write_pwrreg(host, MCI_PWR_ON | pwr);
365 }
366}
367
368static u32 sdmmc_get_dctrl_cfg(struct mmci_host *host)
369{
370 u32 datactrl;
371
372 datactrl = mmci_dctrl_blksz(host);
373
374 if (host->mmc->card && mmc_card_sdio(host->mmc->card) &&
375 host->data->blocks == 1)
376 datactrl |= MCI_DPSM_STM32_MODE_SDIO;
377 else if (host->data->stop && !host->mrq->sbc)
378 datactrl |= MCI_DPSM_STM32_MODE_BLOCK_STOP;
379 else
380 datactrl |= MCI_DPSM_STM32_MODE_BLOCK;
381
382 return datactrl;
383}
384
385static bool sdmmc_busy_complete(struct mmci_host *host, u32 status, u32 err_msk)
386{
387 void __iomem *base = host->base;
388 u32 busy_d0, busy_d0end, mask, sdmmc_status;
389
390 mask = readl_relaxed(base + MMCIMASK0);
391 sdmmc_status = readl_relaxed(base + MMCISTATUS);
392 busy_d0end = sdmmc_status & MCI_STM32_BUSYD0END;
393 busy_d0 = sdmmc_status & MCI_STM32_BUSYD0;
394
395 /* complete if there is an error or busy_d0end */
396 if ((status & err_msk) || busy_d0end)
397 goto complete;
398
399 /*
400 * On response the busy signaling is reflected in the BUSYD0 flag.
401 * if busy_d0 is in-progress we must activate busyd0end interrupt
402 * to wait this completion. Else this request has no busy step.
403 */
404 if (busy_d0) {
405 if (!host->busy_status) {
406 writel_relaxed(mask | host->variant->busy_detect_mask,
407 base + MMCIMASK0);
408 host->busy_status = status &
409 (MCI_CMDSENT | MCI_CMDRESPEND);
410 }
411 return false;
412 }
413
414complete:
415 if (host->busy_status) {
416 writel_relaxed(mask & ~host->variant->busy_detect_mask,
417 base + MMCIMASK0);
418 host->busy_status = 0;
419 }
420
421 writel_relaxed(host->variant->busy_detect_mask, base + MMCICLEAR);
422
423 return true;
424}
425
426static void sdmmc_dlyb_set_cfgr(struct sdmmc_dlyb *dlyb,
427 int unit, int phase, bool sampler)
428{
429 u32 cfgr;
430
431 writel_relaxed(DLYB_CR_SEN | DLYB_CR_DEN, dlyb->base + DLYB_CR);
432
433 cfgr = FIELD_PREP(DLYB_CFGR_UNIT_MASK, unit) |
434 FIELD_PREP(DLYB_CFGR_SEL_MASK, phase);
435 writel_relaxed(cfgr, dlyb->base + DLYB_CFGR);
436
437 if (!sampler)
438 writel_relaxed(DLYB_CR_DEN, dlyb->base + DLYB_CR);
439}
440
441static int sdmmc_dlyb_lng_tuning(struct mmci_host *host)
442{
443 struct sdmmc_dlyb *dlyb = host->variant_priv;
444 u32 cfgr;
445 int i, lng, ret;
446
447 for (i = 0; i <= DLYB_CFGR_UNIT_MAX; i++) {
448 sdmmc_dlyb_set_cfgr(dlyb, i, DLYB_CFGR_SEL_MAX, true);
449
450 ret = readl_relaxed_poll_timeout(dlyb->base + DLYB_CFGR, cfgr,
451 (cfgr & DLYB_CFGR_LNGF),
452 1, DLYB_LNG_TIMEOUT_US);
453 if (ret) {
454 dev_warn(mmc_dev(host->mmc),
455 "delay line cfg timeout unit:%d cfgr:%d\n",
456 i, cfgr);
457 continue;
458 }
459
460 lng = FIELD_GET(DLYB_CFGR_LNG_MASK, cfgr);
461 if (lng < BIT(DLYB_NB_DELAY) && lng > 0)
462 break;
463 }
464
465 if (i > DLYB_CFGR_UNIT_MAX)
466 return -EINVAL;
467
468 dlyb->unit = i;
469 dlyb->max = __fls(lng);
470
471 return 0;
472}
473
474static int sdmmc_dlyb_phase_tuning(struct mmci_host *host, u32 opcode)
475{
476 struct sdmmc_dlyb *dlyb = host->variant_priv;
477 int cur_len = 0, max_len = 0, end_of_len = 0;
478 int phase;
479
480 for (phase = 0; phase <= dlyb->max; phase++) {
481 sdmmc_dlyb_set_cfgr(dlyb, dlyb->unit, phase, false);
482
483 if (mmc_send_tuning(host->mmc, opcode, NULL)) {
484 cur_len = 0;
485 } else {
486 cur_len++;
487 if (cur_len > max_len) {
488 max_len = cur_len;
489 end_of_len = phase;
490 }
491 }
492 }
493
494 if (!max_len) {
495 dev_err(mmc_dev(host->mmc), "no tuning point found\n");
496 return -EINVAL;
497 }
498
499 writel_relaxed(0, dlyb->base + DLYB_CR);
500
501 phase = end_of_len - max_len / 2;
502 sdmmc_dlyb_set_cfgr(dlyb, dlyb->unit, phase, false);
503
504 dev_dbg(mmc_dev(host->mmc), "unit:%d max_dly:%d phase:%d\n",
505 dlyb->unit, dlyb->max, phase);
506
507 return 0;
508}
509
510static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
511{
512 struct mmci_host *host = mmc_priv(mmc);
513 struct sdmmc_dlyb *dlyb = host->variant_priv;
514
515 if (!dlyb || !dlyb->base)
516 return -EINVAL;
517
518 if (sdmmc_dlyb_lng_tuning(host))
519 return -EINVAL;
520
521 return sdmmc_dlyb_phase_tuning(host, opcode);
522}
523
524static void sdmmc_pre_sig_volt_vswitch(struct mmci_host *host)
525{
526 /* clear the voltage switch completion flag */
527 writel_relaxed(MCI_STM32_VSWENDC, host->base + MMCICLEAR);
528 /* enable Voltage switch procedure */
529 mmci_write_pwrreg(host, host->pwr_reg | MCI_STM32_VSWITCHEN);
530}
531
532static int sdmmc_post_sig_volt_switch(struct mmci_host *host,
533 struct mmc_ios *ios)
534{
535 unsigned long flags;
536 u32 status;
537 int ret = 0;
538
539 spin_lock_irqsave(&host->lock, flags);
540 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180 &&
541 host->pwr_reg & MCI_STM32_VSWITCHEN) {
542 mmci_write_pwrreg(host, host->pwr_reg | MCI_STM32_VSWITCH);
543 spin_unlock_irqrestore(&host->lock, flags);
544
545 /* wait voltage switch completion while 10ms */
546 ret = readl_relaxed_poll_timeout(host->base + MMCISTATUS,
547 status,
548 (status & MCI_STM32_VSWEND),
549 10, SDMMC_VSWEND_TIMEOUT_US);
550
551 writel_relaxed(MCI_STM32_VSWENDC | MCI_STM32_CKSTOPC,
552 host->base + MMCICLEAR);
553 spin_lock_irqsave(&host->lock, flags);
554 mmci_write_pwrreg(host, host->pwr_reg &
555 ~(MCI_STM32_VSWITCHEN | MCI_STM32_VSWITCH));
556 }
557 spin_unlock_irqrestore(&host->lock, flags);
558
559 return ret;
560}
561
562static struct mmci_host_ops sdmmc_variant_ops = {
563 .validate_data = sdmmc_idma_validate_data,
564 .prep_data = sdmmc_idma_prep_data,
565 .unprep_data = sdmmc_idma_unprep_data,
566 .get_datactrl_cfg = sdmmc_get_dctrl_cfg,
567 .dma_setup = sdmmc_idma_setup,
568 .dma_start = sdmmc_idma_start,
569 .dma_finalize = sdmmc_idma_finalize,
570 .set_clkreg = mmci_sdmmc_set_clkreg,
571 .set_pwrreg = mmci_sdmmc_set_pwrreg,
572 .busy_complete = sdmmc_busy_complete,
573 .pre_sig_volt_switch = sdmmc_pre_sig_volt_vswitch,
574 .post_sig_volt_switch = sdmmc_post_sig_volt_switch,
575};
576
577void sdmmc_variant_init(struct mmci_host *host)
578{
579 struct device_node *np = host->mmc->parent->of_node;
580 void __iomem *base_dlyb;
581 struct sdmmc_dlyb *dlyb;
582
583 host->ops = &sdmmc_variant_ops;
584 host->pwr_reg = readl_relaxed(host->base + MMCIPOWER);
585
586 base_dlyb = devm_of_iomap(mmc_dev(host->mmc), np, 1, NULL);
587 if (IS_ERR(base_dlyb))
588 return;
589
590 dlyb = devm_kzalloc(mmc_dev(host->mmc), sizeof(*dlyb), GFP_KERNEL);
591 if (!dlyb)
592 return;
593
594 dlyb->base = base_dlyb;
595 host->variant_priv = dlyb;
596 host->mmc_ops->execute_tuning = sdmmc_execute_tuning;
597}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics 2018 - All Rights Reserved
4 * Author: Ludovic.barre@st.com for STMicroelectronics.
5 */
6#include <linux/bitfield.h>
7#include <linux/delay.h>
8#include <linux/dma-mapping.h>
9#include <linux/iopoll.h>
10#include <linux/mmc/host.h>
11#include <linux/mmc/card.h>
12#include <linux/of_address.h>
13#include <linux/reset.h>
14#include <linux/scatterlist.h>
15#include "mmci.h"
16
17#define SDMMC_LLI_BUF_LEN PAGE_SIZE
18
19#define DLYB_CR 0x0
20#define DLYB_CR_DEN BIT(0)
21#define DLYB_CR_SEN BIT(1)
22
23#define DLYB_CFGR 0x4
24#define DLYB_CFGR_SEL_MASK GENMASK(3, 0)
25#define DLYB_CFGR_UNIT_MASK GENMASK(14, 8)
26#define DLYB_CFGR_LNG_MASK GENMASK(27, 16)
27#define DLYB_CFGR_LNGF BIT(31)
28
29#define DLYB_NB_DELAY 11
30#define DLYB_CFGR_SEL_MAX (DLYB_NB_DELAY + 1)
31#define DLYB_CFGR_UNIT_MAX 127
32
33#define DLYB_LNG_TIMEOUT_US 1000
34#define SDMMC_VSWEND_TIMEOUT_US 10000
35
36#define SYSCFG_DLYBSD_CR 0x0
37#define DLYBSD_CR_EN BIT(0)
38#define DLYBSD_CR_RXTAPSEL_MASK GENMASK(6, 1)
39#define DLYBSD_TAPSEL_NB 32
40#define DLYBSD_BYP_EN BIT(16)
41#define DLYBSD_BYP_CMD GENMASK(21, 17)
42#define DLYBSD_ANTIGLITCH_EN BIT(22)
43
44#define SYSCFG_DLYBSD_SR 0x4
45#define DLYBSD_SR_LOCK BIT(0)
46#define DLYBSD_SR_RXTAPSEL_ACK BIT(1)
47
48#define DLYBSD_TIMEOUT_1S_IN_US 1000000
49
50struct sdmmc_lli_desc {
51 u32 idmalar;
52 u32 idmabase;
53 u32 idmasize;
54};
55
56struct sdmmc_idma {
57 dma_addr_t sg_dma;
58 void *sg_cpu;
59 dma_addr_t bounce_dma_addr;
60 void *bounce_buf;
61 bool use_bounce_buffer;
62};
63
64struct sdmmc_dlyb;
65
66struct sdmmc_tuning_ops {
67 int (*dlyb_enable)(struct sdmmc_dlyb *dlyb);
68 void (*set_input_ck)(struct sdmmc_dlyb *dlyb);
69 int (*tuning_prepare)(struct mmci_host *host);
70 int (*set_cfg)(struct sdmmc_dlyb *dlyb, int unit __maybe_unused,
71 int phase, bool sampler __maybe_unused);
72};
73
74struct sdmmc_dlyb {
75 void __iomem *base;
76 u32 unit;
77 u32 max;
78 struct sdmmc_tuning_ops *ops;
79};
80
81static int sdmmc_idma_validate_data(struct mmci_host *host,
82 struct mmc_data *data)
83{
84 struct sdmmc_idma *idma = host->dma_priv;
85 struct device *dev = mmc_dev(host->mmc);
86 struct scatterlist *sg;
87 int i;
88
89 /*
90 * idma has constraints on idmabase & idmasize for each element
91 * excepted the last element which has no constraint on idmasize
92 */
93 idma->use_bounce_buffer = false;
94 for_each_sg(data->sg, sg, data->sg_len - 1, i) {
95 if (!IS_ALIGNED(sg->offset, sizeof(u32)) ||
96 !IS_ALIGNED(sg->length,
97 host->variant->stm32_idmabsize_align)) {
98 dev_dbg(mmc_dev(host->mmc),
99 "unaligned scatterlist: ofst:%x length:%d\n",
100 data->sg->offset, data->sg->length);
101 goto use_bounce_buffer;
102 }
103 }
104
105 if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
106 dev_dbg(mmc_dev(host->mmc),
107 "unaligned last scatterlist: ofst:%x length:%d\n",
108 data->sg->offset, data->sg->length);
109 goto use_bounce_buffer;
110 }
111
112 return 0;
113
114use_bounce_buffer:
115 if (!idma->bounce_buf) {
116 idma->bounce_buf = dmam_alloc_coherent(dev,
117 host->mmc->max_req_size,
118 &idma->bounce_dma_addr,
119 GFP_KERNEL);
120 if (!idma->bounce_buf) {
121 dev_err(dev, "Unable to map allocate DMA bounce buffer.\n");
122 return -ENOMEM;
123 }
124 }
125
126 idma->use_bounce_buffer = true;
127
128 return 0;
129}
130
131static int _sdmmc_idma_prep_data(struct mmci_host *host,
132 struct mmc_data *data)
133{
134 struct sdmmc_idma *idma = host->dma_priv;
135
136 if (idma->use_bounce_buffer) {
137 if (data->flags & MMC_DATA_WRITE) {
138 unsigned int xfer_bytes = data->blksz * data->blocks;
139
140 sg_copy_to_buffer(data->sg, data->sg_len,
141 idma->bounce_buf, xfer_bytes);
142 dma_wmb();
143 }
144 } else {
145 int n_elem;
146
147 n_elem = dma_map_sg(mmc_dev(host->mmc),
148 data->sg,
149 data->sg_len,
150 mmc_get_dma_dir(data));
151
152 if (!n_elem) {
153 dev_err(mmc_dev(host->mmc), "dma_map_sg failed\n");
154 return -EINVAL;
155 }
156 }
157 return 0;
158}
159
160static int sdmmc_idma_prep_data(struct mmci_host *host,
161 struct mmc_data *data, bool next)
162{
163 /* Check if job is already prepared. */
164 if (!next && data->host_cookie == host->next_cookie)
165 return 0;
166
167 return _sdmmc_idma_prep_data(host, data);
168}
169
170static void sdmmc_idma_unprep_data(struct mmci_host *host,
171 struct mmc_data *data, int err)
172{
173 struct sdmmc_idma *idma = host->dma_priv;
174
175 if (idma->use_bounce_buffer) {
176 if (data->flags & MMC_DATA_READ) {
177 unsigned int xfer_bytes = data->blksz * data->blocks;
178
179 sg_copy_from_buffer(data->sg, data->sg_len,
180 idma->bounce_buf, xfer_bytes);
181 }
182 } else {
183 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
184 mmc_get_dma_dir(data));
185 }
186}
187
188static int sdmmc_idma_setup(struct mmci_host *host)
189{
190 struct sdmmc_idma *idma;
191 struct device *dev = mmc_dev(host->mmc);
192
193 idma = devm_kzalloc(dev, sizeof(*idma), GFP_KERNEL);
194 if (!idma)
195 return -ENOMEM;
196
197 host->dma_priv = idma;
198
199 if (host->variant->dma_lli) {
200 idma->sg_cpu = dmam_alloc_coherent(dev, SDMMC_LLI_BUF_LEN,
201 &idma->sg_dma, GFP_KERNEL);
202 if (!idma->sg_cpu) {
203 dev_err(dev, "Failed to alloc IDMA descriptor\n");
204 return -ENOMEM;
205 }
206 host->mmc->max_segs = SDMMC_LLI_BUF_LEN /
207 sizeof(struct sdmmc_lli_desc);
208 host->mmc->max_seg_size = host->variant->stm32_idmabsize_mask;
209
210 host->mmc->max_req_size = SZ_1M;
211 } else {
212 host->mmc->max_segs = 1;
213 host->mmc->max_seg_size = host->mmc->max_req_size;
214 }
215
216 return dma_set_max_seg_size(dev, host->mmc->max_seg_size);
217}
218
219static int sdmmc_idma_start(struct mmci_host *host, unsigned int *datactrl)
220
221{
222 struct sdmmc_idma *idma = host->dma_priv;
223 struct sdmmc_lli_desc *desc = (struct sdmmc_lli_desc *)idma->sg_cpu;
224 struct mmc_data *data = host->data;
225 struct scatterlist *sg;
226 int i;
227
228 host->dma_in_progress = true;
229
230 if (!host->variant->dma_lli || data->sg_len == 1 ||
231 idma->use_bounce_buffer) {
232 u32 dma_addr;
233
234 if (idma->use_bounce_buffer)
235 dma_addr = idma->bounce_dma_addr;
236 else
237 dma_addr = sg_dma_address(data->sg);
238
239 writel_relaxed(dma_addr,
240 host->base + MMCI_STM32_IDMABASE0R);
241 writel_relaxed(MMCI_STM32_IDMAEN,
242 host->base + MMCI_STM32_IDMACTRLR);
243 return 0;
244 }
245
246 for_each_sg(data->sg, sg, data->sg_len, i) {
247 desc[i].idmalar = (i + 1) * sizeof(struct sdmmc_lli_desc);
248 desc[i].idmalar |= MMCI_STM32_ULA | MMCI_STM32_ULS
249 | MMCI_STM32_ABR;
250 desc[i].idmabase = sg_dma_address(sg);
251 desc[i].idmasize = sg_dma_len(sg);
252 }
253
254 /* notice the end of link list */
255 desc[data->sg_len - 1].idmalar &= ~MMCI_STM32_ULA;
256
257 dma_wmb();
258 writel_relaxed(idma->sg_dma, host->base + MMCI_STM32_IDMABAR);
259 writel_relaxed(desc[0].idmalar, host->base + MMCI_STM32_IDMALAR);
260 writel_relaxed(desc[0].idmabase, host->base + MMCI_STM32_IDMABASE0R);
261 writel_relaxed(desc[0].idmasize, host->base + MMCI_STM32_IDMABSIZER);
262 writel_relaxed(MMCI_STM32_IDMAEN | MMCI_STM32_IDMALLIEN,
263 host->base + MMCI_STM32_IDMACTRLR);
264
265 return 0;
266}
267
268static void sdmmc_idma_error(struct mmci_host *host)
269{
270 struct mmc_data *data = host->data;
271 struct sdmmc_idma *idma = host->dma_priv;
272
273 if (!dma_inprogress(host))
274 return;
275
276 writel_relaxed(0, host->base + MMCI_STM32_IDMACTRLR);
277 host->dma_in_progress = false;
278 data->host_cookie = 0;
279
280 if (!idma->use_bounce_buffer)
281 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
282 mmc_get_dma_dir(data));
283}
284
285static void sdmmc_idma_finalize(struct mmci_host *host, struct mmc_data *data)
286{
287 if (!dma_inprogress(host))
288 return;
289
290 writel_relaxed(0, host->base + MMCI_STM32_IDMACTRLR);
291 host->dma_in_progress = false;
292
293 if (!data->host_cookie)
294 sdmmc_idma_unprep_data(host, data, 0);
295}
296
297static void mmci_sdmmc_set_clkreg(struct mmci_host *host, unsigned int desired)
298{
299 unsigned int clk = 0, ddr = 0;
300
301 if (host->mmc->ios.timing == MMC_TIMING_MMC_DDR52 ||
302 host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
303 ddr = MCI_STM32_CLK_DDR;
304
305 /*
306 * cclk = mclk / (2 * clkdiv)
307 * clkdiv 0 => bypass
308 * in ddr mode bypass is not possible
309 */
310 if (desired) {
311 if (desired >= host->mclk && !ddr) {
312 host->cclk = host->mclk;
313 } else {
314 clk = DIV_ROUND_UP(host->mclk, 2 * desired);
315 if (clk > MCI_STM32_CLK_CLKDIV_MSK)
316 clk = MCI_STM32_CLK_CLKDIV_MSK;
317 host->cclk = host->mclk / (2 * clk);
318 }
319 } else {
320 /*
321 * while power-on phase the clock can't be define to 0,
322 * Only power-off and power-cyc deactivate the clock.
323 * if desired clock is 0, set max divider
324 */
325 clk = MCI_STM32_CLK_CLKDIV_MSK;
326 host->cclk = host->mclk / (2 * clk);
327 }
328
329 /* Set actual clock for debug */
330 if (host->mmc->ios.power_mode == MMC_POWER_ON)
331 host->mmc->actual_clock = host->cclk;
332 else
333 host->mmc->actual_clock = 0;
334
335 if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4)
336 clk |= MCI_STM32_CLK_WIDEBUS_4;
337 if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8)
338 clk |= MCI_STM32_CLK_WIDEBUS_8;
339
340 clk |= MCI_STM32_CLK_HWFCEN;
341 clk |= host->clk_reg_add;
342 clk |= ddr;
343
344 if (host->mmc->ios.timing >= MMC_TIMING_UHS_SDR50)
345 clk |= MCI_STM32_CLK_BUSSPEED;
346
347 mmci_write_clkreg(host, clk);
348}
349
350static void sdmmc_dlyb_mp15_input_ck(struct sdmmc_dlyb *dlyb)
351{
352 if (!dlyb || !dlyb->base)
353 return;
354
355 /* Output clock = Input clock */
356 writel_relaxed(0, dlyb->base + DLYB_CR);
357}
358
359static void mmci_sdmmc_set_pwrreg(struct mmci_host *host, unsigned int pwr)
360{
361 struct mmc_ios ios = host->mmc->ios;
362 struct sdmmc_dlyb *dlyb = host->variant_priv;
363
364 /* adds OF options */
365 pwr = host->pwr_reg_add;
366
367 if (dlyb && dlyb->ops->set_input_ck)
368 dlyb->ops->set_input_ck(dlyb);
369
370 if (ios.power_mode == MMC_POWER_OFF) {
371 /* Only a reset could power-off sdmmc */
372 reset_control_assert(host->rst);
373 udelay(2);
374 reset_control_deassert(host->rst);
375
376 /*
377 * Set the SDMMC in Power-cycle state.
378 * This will make that the SDMMC_D[7:0], SDMMC_CMD and SDMMC_CK
379 * are driven low, to prevent the Card from being supplied
380 * through the signal lines.
381 */
382 mmci_write_pwrreg(host, MCI_STM32_PWR_CYC | pwr);
383 } else if (ios.power_mode == MMC_POWER_ON) {
384 /*
385 * After power-off (reset): the irq mask defined in probe
386 * functionis lost
387 * ault irq mask (probe) must be activated
388 */
389 writel(MCI_IRQENABLE | host->variant->start_err,
390 host->base + MMCIMASK0);
391
392 /* preserves voltage switch bits */
393 pwr |= host->pwr_reg & (MCI_STM32_VSWITCHEN |
394 MCI_STM32_VSWITCH);
395
396 /*
397 * After a power-cycle state, we must set the SDMMC in
398 * Power-off. The SDMMC_D[7:0], SDMMC_CMD and SDMMC_CK are
399 * driven high. Then we can set the SDMMC to Power-on state
400 */
401 mmci_write_pwrreg(host, MCI_PWR_OFF | pwr);
402 mdelay(1);
403 mmci_write_pwrreg(host, MCI_PWR_ON | pwr);
404 }
405}
406
407static u32 sdmmc_get_dctrl_cfg(struct mmci_host *host)
408{
409 u32 datactrl;
410
411 datactrl = mmci_dctrl_blksz(host);
412
413 if (host->hw_revision >= 3) {
414 u32 thr = 0;
415
416 if (host->mmc->ios.timing == MMC_TIMING_UHS_SDR104 ||
417 host->mmc->ios.timing == MMC_TIMING_MMC_HS200) {
418 thr = ffs(min_t(unsigned int, host->data->blksz,
419 host->variant->fifosize));
420 thr = min_t(u32, thr, MMCI_STM32_THR_MASK);
421 }
422
423 writel_relaxed(thr, host->base + MMCI_STM32_FIFOTHRR);
424 }
425
426 if (host->mmc->card && mmc_card_sdio(host->mmc->card) &&
427 host->data->blocks == 1)
428 datactrl |= MCI_DPSM_STM32_MODE_SDIO;
429 else if (host->data->stop && !host->mrq->sbc)
430 datactrl |= MCI_DPSM_STM32_MODE_BLOCK_STOP;
431 else
432 datactrl |= MCI_DPSM_STM32_MODE_BLOCK;
433
434 return datactrl;
435}
436
437static bool sdmmc_busy_complete(struct mmci_host *host, struct mmc_command *cmd,
438 u32 status, u32 err_msk)
439{
440 void __iomem *base = host->base;
441 u32 busy_d0, busy_d0end, mask, sdmmc_status;
442
443 mask = readl_relaxed(base + MMCIMASK0);
444 sdmmc_status = readl_relaxed(base + MMCISTATUS);
445 busy_d0end = sdmmc_status & MCI_STM32_BUSYD0END;
446 busy_d0 = sdmmc_status & MCI_STM32_BUSYD0;
447
448 /* complete if there is an error or busy_d0end */
449 if ((status & err_msk) || busy_d0end)
450 goto complete;
451
452 /*
453 * On response the busy signaling is reflected in the BUSYD0 flag.
454 * if busy_d0 is in-progress we must activate busyd0end interrupt
455 * to wait this completion. Else this request has no busy step.
456 */
457 if (busy_d0) {
458 if (!host->busy_status) {
459 writel_relaxed(mask | host->variant->busy_detect_mask,
460 base + MMCIMASK0);
461 host->busy_status = status &
462 (MCI_CMDSENT | MCI_CMDRESPEND);
463 }
464 return false;
465 }
466
467complete:
468 if (host->busy_status) {
469 writel_relaxed(mask & ~host->variant->busy_detect_mask,
470 base + MMCIMASK0);
471 host->busy_status = 0;
472 }
473
474 writel_relaxed(host->variant->busy_detect_mask, base + MMCICLEAR);
475
476 return true;
477}
478
479static int sdmmc_dlyb_mp15_enable(struct sdmmc_dlyb *dlyb)
480{
481 writel_relaxed(DLYB_CR_DEN, dlyb->base + DLYB_CR);
482
483 return 0;
484}
485
486static int sdmmc_dlyb_mp15_set_cfg(struct sdmmc_dlyb *dlyb,
487 int unit, int phase, bool sampler)
488{
489 u32 cfgr;
490
491 writel_relaxed(DLYB_CR_SEN | DLYB_CR_DEN, dlyb->base + DLYB_CR);
492
493 cfgr = FIELD_PREP(DLYB_CFGR_UNIT_MASK, unit) |
494 FIELD_PREP(DLYB_CFGR_SEL_MASK, phase);
495 writel_relaxed(cfgr, dlyb->base + DLYB_CFGR);
496
497 if (!sampler)
498 writel_relaxed(DLYB_CR_DEN, dlyb->base + DLYB_CR);
499
500 return 0;
501}
502
503static int sdmmc_dlyb_mp15_prepare(struct mmci_host *host)
504{
505 struct sdmmc_dlyb *dlyb = host->variant_priv;
506 u32 cfgr;
507 int i, lng, ret;
508
509 for (i = 0; i <= DLYB_CFGR_UNIT_MAX; i++) {
510 dlyb->ops->set_cfg(dlyb, i, DLYB_CFGR_SEL_MAX, true);
511
512 ret = readl_relaxed_poll_timeout(dlyb->base + DLYB_CFGR, cfgr,
513 (cfgr & DLYB_CFGR_LNGF),
514 1, DLYB_LNG_TIMEOUT_US);
515 if (ret) {
516 dev_warn(mmc_dev(host->mmc),
517 "delay line cfg timeout unit:%d cfgr:%d\n",
518 i, cfgr);
519 continue;
520 }
521
522 lng = FIELD_GET(DLYB_CFGR_LNG_MASK, cfgr);
523 if (lng < BIT(DLYB_NB_DELAY) && lng > 0)
524 break;
525 }
526
527 if (i > DLYB_CFGR_UNIT_MAX)
528 return -EINVAL;
529
530 dlyb->unit = i;
531 dlyb->max = __fls(lng);
532
533 return 0;
534}
535
536static int sdmmc_dlyb_mp25_enable(struct sdmmc_dlyb *dlyb)
537{
538 u32 cr, sr;
539
540 cr = readl_relaxed(dlyb->base + SYSCFG_DLYBSD_CR);
541 cr |= DLYBSD_CR_EN;
542
543 writel_relaxed(cr, dlyb->base + SYSCFG_DLYBSD_CR);
544
545 return readl_relaxed_poll_timeout(dlyb->base + SYSCFG_DLYBSD_SR,
546 sr, sr & DLYBSD_SR_LOCK, 1,
547 DLYBSD_TIMEOUT_1S_IN_US);
548}
549
550static int sdmmc_dlyb_mp25_set_cfg(struct sdmmc_dlyb *dlyb,
551 int unit __maybe_unused, int phase,
552 bool sampler __maybe_unused)
553{
554 u32 cr, sr;
555
556 cr = readl_relaxed(dlyb->base + SYSCFG_DLYBSD_CR);
557 cr &= ~DLYBSD_CR_RXTAPSEL_MASK;
558 cr |= FIELD_PREP(DLYBSD_CR_RXTAPSEL_MASK, phase);
559
560 writel_relaxed(cr, dlyb->base + SYSCFG_DLYBSD_CR);
561
562 return readl_relaxed_poll_timeout(dlyb->base + SYSCFG_DLYBSD_SR,
563 sr, sr & DLYBSD_SR_RXTAPSEL_ACK, 1,
564 DLYBSD_TIMEOUT_1S_IN_US);
565}
566
567static int sdmmc_dlyb_mp25_prepare(struct mmci_host *host)
568{
569 struct sdmmc_dlyb *dlyb = host->variant_priv;
570
571 dlyb->max = DLYBSD_TAPSEL_NB;
572
573 return 0;
574}
575
576static int sdmmc_dlyb_phase_tuning(struct mmci_host *host, u32 opcode)
577{
578 struct sdmmc_dlyb *dlyb = host->variant_priv;
579 int cur_len = 0, max_len = 0, end_of_len = 0;
580 int phase, ret;
581
582 for (phase = 0; phase <= dlyb->max; phase++) {
583 ret = dlyb->ops->set_cfg(dlyb, dlyb->unit, phase, false);
584 if (ret) {
585 dev_err(mmc_dev(host->mmc), "tuning config failed\n");
586 return ret;
587 }
588
589 if (mmc_send_tuning(host->mmc, opcode, NULL)) {
590 cur_len = 0;
591 } else {
592 cur_len++;
593 if (cur_len > max_len) {
594 max_len = cur_len;
595 end_of_len = phase;
596 }
597 }
598 }
599
600 if (!max_len) {
601 dev_err(mmc_dev(host->mmc), "no tuning point found\n");
602 return -EINVAL;
603 }
604
605 if (dlyb->ops->set_input_ck)
606 dlyb->ops->set_input_ck(dlyb);
607
608 phase = end_of_len - max_len / 2;
609 ret = dlyb->ops->set_cfg(dlyb, dlyb->unit, phase, false);
610 if (ret) {
611 dev_err(mmc_dev(host->mmc), "tuning reconfig failed\n");
612 return ret;
613 }
614
615 dev_dbg(mmc_dev(host->mmc), "unit:%d max_dly:%d phase:%d\n",
616 dlyb->unit, dlyb->max, phase);
617
618 return 0;
619}
620
621static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
622{
623 struct mmci_host *host = mmc_priv(mmc);
624 struct sdmmc_dlyb *dlyb = host->variant_priv;
625 u32 clk;
626 int ret;
627
628 if ((host->mmc->ios.timing != MMC_TIMING_UHS_SDR104 &&
629 host->mmc->ios.timing != MMC_TIMING_MMC_HS200) ||
630 host->mmc->actual_clock <= 50000000)
631 return 0;
632
633 if (!dlyb || !dlyb->base)
634 return -EINVAL;
635
636 ret = dlyb->ops->dlyb_enable(dlyb);
637 if (ret)
638 return ret;
639
640 /*
641 * SDMMC_FBCK is selected when an external Delay Block is needed
642 * with SDR104 or HS200.
643 */
644 clk = host->clk_reg;
645 clk &= ~MCI_STM32_CLK_SEL_MSK;
646 clk |= MCI_STM32_CLK_SELFBCK;
647 mmci_write_clkreg(host, clk);
648
649 ret = dlyb->ops->tuning_prepare(host);
650 if (ret)
651 return ret;
652
653 return sdmmc_dlyb_phase_tuning(host, opcode);
654}
655
656static void sdmmc_pre_sig_volt_vswitch(struct mmci_host *host)
657{
658 /* clear the voltage switch completion flag */
659 writel_relaxed(MCI_STM32_VSWENDC, host->base + MMCICLEAR);
660 /* enable Voltage switch procedure */
661 mmci_write_pwrreg(host, host->pwr_reg | MCI_STM32_VSWITCHEN);
662}
663
664static int sdmmc_post_sig_volt_switch(struct mmci_host *host,
665 struct mmc_ios *ios)
666{
667 unsigned long flags;
668 u32 status;
669 int ret = 0;
670
671 spin_lock_irqsave(&host->lock, flags);
672 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180 &&
673 host->pwr_reg & MCI_STM32_VSWITCHEN) {
674 mmci_write_pwrreg(host, host->pwr_reg | MCI_STM32_VSWITCH);
675 spin_unlock_irqrestore(&host->lock, flags);
676
677 /* wait voltage switch completion while 10ms */
678 ret = readl_relaxed_poll_timeout(host->base + MMCISTATUS,
679 status,
680 (status & MCI_STM32_VSWEND),
681 10, SDMMC_VSWEND_TIMEOUT_US);
682
683 writel_relaxed(MCI_STM32_VSWENDC | MCI_STM32_CKSTOPC,
684 host->base + MMCICLEAR);
685 spin_lock_irqsave(&host->lock, flags);
686 mmci_write_pwrreg(host, host->pwr_reg &
687 ~(MCI_STM32_VSWITCHEN | MCI_STM32_VSWITCH));
688 }
689 spin_unlock_irqrestore(&host->lock, flags);
690
691 return ret;
692}
693
694static struct mmci_host_ops sdmmc_variant_ops = {
695 .validate_data = sdmmc_idma_validate_data,
696 .prep_data = sdmmc_idma_prep_data,
697 .unprep_data = sdmmc_idma_unprep_data,
698 .get_datactrl_cfg = sdmmc_get_dctrl_cfg,
699 .dma_setup = sdmmc_idma_setup,
700 .dma_start = sdmmc_idma_start,
701 .dma_finalize = sdmmc_idma_finalize,
702 .dma_error = sdmmc_idma_error,
703 .set_clkreg = mmci_sdmmc_set_clkreg,
704 .set_pwrreg = mmci_sdmmc_set_pwrreg,
705 .busy_complete = sdmmc_busy_complete,
706 .pre_sig_volt_switch = sdmmc_pre_sig_volt_vswitch,
707 .post_sig_volt_switch = sdmmc_post_sig_volt_switch,
708};
709
710static struct sdmmc_tuning_ops dlyb_tuning_mp15_ops = {
711 .dlyb_enable = sdmmc_dlyb_mp15_enable,
712 .set_input_ck = sdmmc_dlyb_mp15_input_ck,
713 .tuning_prepare = sdmmc_dlyb_mp15_prepare,
714 .set_cfg = sdmmc_dlyb_mp15_set_cfg,
715};
716
717static struct sdmmc_tuning_ops dlyb_tuning_mp25_ops = {
718 .dlyb_enable = sdmmc_dlyb_mp25_enable,
719 .tuning_prepare = sdmmc_dlyb_mp25_prepare,
720 .set_cfg = sdmmc_dlyb_mp25_set_cfg,
721};
722
723void sdmmc_variant_init(struct mmci_host *host)
724{
725 struct device_node *np = host->mmc->parent->of_node;
726 void __iomem *base_dlyb;
727 struct sdmmc_dlyb *dlyb;
728
729 host->ops = &sdmmc_variant_ops;
730 host->pwr_reg = readl_relaxed(host->base + MMCIPOWER);
731
732 base_dlyb = devm_of_iomap(mmc_dev(host->mmc), np, 1, NULL);
733 if (IS_ERR(base_dlyb))
734 return;
735
736 dlyb = devm_kzalloc(mmc_dev(host->mmc), sizeof(*dlyb), GFP_KERNEL);
737 if (!dlyb)
738 return;
739
740 dlyb->base = base_dlyb;
741 if (of_device_is_compatible(np, "st,stm32mp25-sdmmc2"))
742 dlyb->ops = &dlyb_tuning_mp25_ops;
743 else
744 dlyb->ops = &dlyb_tuning_mp15_ops;
745
746 host->variant_priv = dlyb;
747 host->mmc_ops->execute_tuning = sdmmc_execute_tuning;
748}