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[linux.git] / drivers / mmc / host / sdhci-of-arasan.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Arasan Secure Digital Host Controller Interface.
4  * Copyright (C) 2011 - 2012 Michal Simek <[email protected]>
5  * Copyright (c) 2012 Wind River Systems, Inc.
6  * Copyright (C) 2013 Pengutronix e.K.
7  * Copyright (C) 2013 Xilinx Inc.
8  *
9  * Based on sdhci-of-esdhc.c
10  *
11  * Copyright (c) 2007 Freescale Semiconductor, Inc.
12  * Copyright (c) 2009 MontaVista Software, Inc.
13  *
14  * Authors: Xiaobo Xie <[email protected]>
15  *          Anton Vorontsov <[email protected]>
16  */
17
18 #include <linux/clk-provider.h>
19 #include <linux/mfd/syscon.h>
20 #include <linux/module.h>
21 #include <linux/of_device.h>
22 #include <linux/phy/phy.h>
23 #include <linux/regmap.h>
24 #include <linux/of.h>
25 #include <linux/firmware/xlnx-zynqmp.h>
26
27 #include "cqhci.h"
28 #include "sdhci-pltfm.h"
29
30 #define SDHCI_ARASAN_VENDOR_REGISTER    0x78
31
32 #define SDHCI_ARASAN_ITAPDLY_REGISTER   0xF0F8
33 #define SDHCI_ARASAN_ITAPDLY_SEL_MASK   0xFF
34
35 #define SDHCI_ARASAN_OTAPDLY_REGISTER   0xF0FC
36 #define SDHCI_ARASAN_OTAPDLY_SEL_MASK   0x3F
37
38 #define SDHCI_ARASAN_CQE_BASE_ADDR      0x200
39 #define VENDOR_ENHANCED_STROBE          BIT(0)
40
41 #define PHY_CLK_TOO_SLOW_HZ             400000
42
43 #define SDHCI_ITAPDLY_CHGWIN            0x200
44 #define SDHCI_ITAPDLY_ENABLE            0x100
45 #define SDHCI_OTAPDLY_ENABLE            0x40
46
47 /* Default settings for ZynqMP Clock Phases */
48 #define ZYNQMP_ICLK_PHASE {0, 63, 63, 0, 63,  0,   0, 183, 54,  0, 0}
49 #define ZYNQMP_OCLK_PHASE {0, 72, 60, 0, 60, 72, 135, 48, 72, 135, 0}
50
51 #define VERSAL_ICLK_PHASE {0, 132, 132, 0, 132, 0, 0, 162, 90, 0, 0}
52 #define VERSAL_OCLK_PHASE {0,  60, 48, 0, 48, 72, 90, 36, 60, 90, 0}
53
54 /*
55  * On some SoCs the syscon area has a feature where the upper 16-bits of
56  * each 32-bit register act as a write mask for the lower 16-bits.  This allows
57  * atomic updates of the register without locking.  This macro is used on SoCs
58  * that have that feature.
59  */
60 #define HIWORD_UPDATE(val, mask, shift) \
61                 ((val) << (shift) | (mask) << ((shift) + 16))
62
63 /**
64  * struct sdhci_arasan_soc_ctl_field - Field used in sdhci_arasan_soc_ctl_map
65  *
66  * @reg:        Offset within the syscon of the register containing this field
67  * @width:      Number of bits for this field
68  * @shift:      Bit offset within @reg of this field (or -1 if not avail)
69  */
70 struct sdhci_arasan_soc_ctl_field {
71         u32 reg;
72         u16 width;
73         s16 shift;
74 };
75
76 /**
77  * struct sdhci_arasan_soc_ctl_map - Map in syscon to corecfg registers
78  *
79  * @baseclkfreq:        Where to find corecfg_baseclkfreq
80  * @clockmultiplier:    Where to find corecfg_clockmultiplier
81  * @support64b:         Where to find SUPPORT64B bit
82  * @hiword_update:      If true, use HIWORD_UPDATE to access the syscon
83  *
84  * It's up to the licensee of the Arsan IP block to make these available
85  * somewhere if needed.  Presumably these will be scattered somewhere that's
86  * accessible via the syscon API.
87  */
88 struct sdhci_arasan_soc_ctl_map {
89         struct sdhci_arasan_soc_ctl_field       baseclkfreq;
90         struct sdhci_arasan_soc_ctl_field       clockmultiplier;
91         struct sdhci_arasan_soc_ctl_field       support64b;
92         bool                                    hiword_update;
93 };
94
95 /**
96  * struct sdhci_arasan_clk_ops - Clock Operations for Arasan SD controller
97  *
98  * @sdcardclk_ops:      The output clock related operations
99  * @sampleclk_ops:      The sample clock related operations
100  */
101 struct sdhci_arasan_clk_ops {
102         const struct clk_ops *sdcardclk_ops;
103         const struct clk_ops *sampleclk_ops;
104 };
105
106 /**
107  * struct sdhci_arasan_clk_data - Arasan Controller Clock Data.
108  *
109  * @sdcardclk_hw:       Struct for the clock we might provide to a PHY.
110  * @sdcardclk:          Pointer to normal 'struct clock' for sdcardclk_hw.
111  * @sampleclk_hw:       Struct for the clock we might provide to a PHY.
112  * @sampleclk:          Pointer to normal 'struct clock' for sampleclk_hw.
113  * @clk_phase_in:       Array of Input Clock Phase Delays for all speed modes
114  * @clk_phase_out:      Array of Output Clock Phase Delays for all speed modes
115  * @set_clk_delays:     Function pointer for setting Clock Delays
116  * @clk_of_data:        Platform specific runtime clock data storage pointer
117  */
118 struct sdhci_arasan_clk_data {
119         struct clk_hw   sdcardclk_hw;
120         struct clk      *sdcardclk;
121         struct clk_hw   sampleclk_hw;
122         struct clk      *sampleclk;
123         int             clk_phase_in[MMC_TIMING_MMC_HS400 + 1];
124         int             clk_phase_out[MMC_TIMING_MMC_HS400 + 1];
125         void            (*set_clk_delays)(struct sdhci_host *host);
126         void            *clk_of_data;
127 };
128
129 /**
130  * struct sdhci_arasan_data - Arasan Controller Data
131  *
132  * @host:               Pointer to the main SDHCI host structure.
133  * @clk_ahb:            Pointer to the AHB clock
134  * @phy:                Pointer to the generic phy
135  * @is_phy_on:          True if the PHY is on; false if not.
136  * @has_cqe:            True if controller has command queuing engine.
137  * @clk_data:           Struct for the Arasan Controller Clock Data.
138  * @clk_ops:            Struct for the Arasan Controller Clock Operations.
139  * @soc_ctl_base:       Pointer to regmap for syscon for soc_ctl registers.
140  * @soc_ctl_map:        Map to get offsets into soc_ctl registers.
141  * @quirks:             Arasan deviations from spec.
142  */
143 struct sdhci_arasan_data {
144         struct sdhci_host *host;
145         struct clk      *clk_ahb;
146         struct phy      *phy;
147         bool            is_phy_on;
148
149         bool            has_cqe;
150         struct sdhci_arasan_clk_data clk_data;
151         const struct sdhci_arasan_clk_ops *clk_ops;
152
153         struct regmap   *soc_ctl_base;
154         const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
155         unsigned int    quirks;
156
157 /* Controller does not have CD wired and will not function normally without */
158 #define SDHCI_ARASAN_QUIRK_FORCE_CDTEST BIT(0)
159 /* Controller immediately reports SDHCI_CLOCK_INT_STABLE after enabling the
160  * internal clock even when the clock isn't stable */
161 #define SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE BIT(1)
162 /*
163  * Some of the Arasan variations might not have timing requirements
164  * met at 25MHz for Default Speed mode, those controllers work at
165  * 19MHz instead
166  */
167 #define SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN BIT(2)
168 };
169
170 struct sdhci_arasan_of_data {
171         const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
172         const struct sdhci_pltfm_data *pdata;
173         const struct sdhci_arasan_clk_ops *clk_ops;
174 };
175
176 static const struct sdhci_arasan_soc_ctl_map rk3399_soc_ctl_map = {
177         .baseclkfreq = { .reg = 0xf000, .width = 8, .shift = 8 },
178         .clockmultiplier = { .reg = 0xf02c, .width = 8, .shift = 0},
179         .hiword_update = true,
180 };
181
182 static const struct sdhci_arasan_soc_ctl_map intel_lgm_emmc_soc_ctl_map = {
183         .baseclkfreq = { .reg = 0xa0, .width = 8, .shift = 2 },
184         .clockmultiplier = { .reg = 0, .width = -1, .shift = -1 },
185         .hiword_update = false,
186 };
187
188 static const struct sdhci_arasan_soc_ctl_map intel_lgm_sdxc_soc_ctl_map = {
189         .baseclkfreq = { .reg = 0x80, .width = 8, .shift = 2 },
190         .clockmultiplier = { .reg = 0, .width = -1, .shift = -1 },
191         .hiword_update = false,
192 };
193
194 static const struct sdhci_arasan_soc_ctl_map thunderbay_soc_ctl_map = {
195         .baseclkfreq = { .reg = 0x0, .width = 8, .shift = 14 },
196         .clockmultiplier = { .reg = 0x4, .width = 8, .shift = 14 },
197         .support64b = { .reg = 0x4, .width = 1, .shift = 24 },
198         .hiword_update = false,
199 };
200
201 static const struct sdhci_arasan_soc_ctl_map intel_keembay_soc_ctl_map = {
202         .baseclkfreq = { .reg = 0x0, .width = 8, .shift = 14 },
203         .clockmultiplier = { .reg = 0x4, .width = 8, .shift = 14 },
204         .support64b = { .reg = 0x4, .width = 1, .shift = 24 },
205         .hiword_update = false,
206 };
207
208 /**
209  * sdhci_arasan_syscon_write - Write to a field in soc_ctl registers
210  *
211  * @host:       The sdhci_host
212  * @fld:        The field to write to
213  * @val:        The value to write
214  *
215  * This function allows writing to fields in sdhci_arasan_soc_ctl_map.
216  * Note that if a field is specified as not available (shift < 0) then
217  * this function will silently return an error code.  It will be noisy
218  * and print errors for any other (unexpected) errors.
219  *
220  * Return: 0 on success and error value on error
221  */
222 static int sdhci_arasan_syscon_write(struct sdhci_host *host,
223                                    const struct sdhci_arasan_soc_ctl_field *fld,
224                                    u32 val)
225 {
226         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
227         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
228         struct regmap *soc_ctl_base = sdhci_arasan->soc_ctl_base;
229         u32 reg = fld->reg;
230         u16 width = fld->width;
231         s16 shift = fld->shift;
232         int ret;
233
234         /*
235          * Silently return errors for shift < 0 so caller doesn't have
236          * to check for fields which are optional.  For fields that
237          * are required then caller needs to do something special
238          * anyway.
239          */
240         if (shift < 0)
241                 return -EINVAL;
242
243         if (sdhci_arasan->soc_ctl_map->hiword_update)
244                 ret = regmap_write(soc_ctl_base, reg,
245                                    HIWORD_UPDATE(val, GENMASK(width, 0),
246                                                  shift));
247         else
248                 ret = regmap_update_bits(soc_ctl_base, reg,
249                                          GENMASK(shift + width, shift),
250                                          val << shift);
251
252         /* Yell about (unexpected) regmap errors */
253         if (ret)
254                 pr_warn("%s: Regmap write fail: %d\n",
255                          mmc_hostname(host->mmc), ret);
256
257         return ret;
258 }
259
260 static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock)
261 {
262         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
263         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
264         struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
265         bool ctrl_phy = false;
266
267         if (!IS_ERR(sdhci_arasan->phy)) {
268                 if (!sdhci_arasan->is_phy_on && clock <= PHY_CLK_TOO_SLOW_HZ) {
269                         /*
270                          * If PHY off, set clock to max speed and power PHY on.
271                          *
272                          * Although PHY docs apparently suggest power cycling
273                          * when changing the clock the PHY doesn't like to be
274                          * powered on while at low speeds like those used in ID
275                          * mode.  Even worse is powering the PHY on while the
276                          * clock is off.
277                          *
278                          * To workaround the PHY limitations, the best we can
279                          * do is to power it on at a faster speed and then slam
280                          * through low speeds without power cycling.
281                          */
282                         sdhci_set_clock(host, host->max_clk);
283                         if (phy_power_on(sdhci_arasan->phy)) {
284                                 pr_err("%s: Cannot power on phy.\n",
285                                        mmc_hostname(host->mmc));
286                                 return;
287                         }
288
289                         sdhci_arasan->is_phy_on = true;
290
291                         /*
292                          * We'll now fall through to the below case with
293                          * ctrl_phy = false (so we won't turn off/on).  The
294                          * sdhci_set_clock() will set the real clock.
295                          */
296                 } else if (clock > PHY_CLK_TOO_SLOW_HZ) {
297                         /*
298                          * At higher clock speeds the PHY is fine being power
299                          * cycled and docs say you _should_ power cycle when
300                          * changing clock speeds.
301                          */
302                         ctrl_phy = true;
303                 }
304         }
305
306         if (ctrl_phy && sdhci_arasan->is_phy_on) {
307                 phy_power_off(sdhci_arasan->phy);
308                 sdhci_arasan->is_phy_on = false;
309         }
310
311         if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN) {
312                 /*
313                  * Some of the Arasan variations might not have timing
314                  * requirements met at 25MHz for Default Speed mode,
315                  * those controllers work at 19MHz instead.
316                  */
317                 if (clock == DEFAULT_SPEED_MAX_DTR)
318                         clock = (DEFAULT_SPEED_MAX_DTR * 19) / 25;
319         }
320
321         /* Set the Input and Output Clock Phase Delays */
322         if (clk_data->set_clk_delays)
323                 clk_data->set_clk_delays(host);
324
325         sdhci_set_clock(host, clock);
326
327         if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE)
328                 /*
329                  * Some controllers immediately report SDHCI_CLOCK_INT_STABLE
330                  * after enabling the clock even though the clock is not
331                  * stable. Trying to use a clock without waiting here results
332                  * in EILSEQ while detecting some older/slower cards. The
333                  * chosen delay is the maximum delay from sdhci_set_clock.
334                  */
335                 msleep(20);
336
337         if (ctrl_phy) {
338                 if (phy_power_on(sdhci_arasan->phy)) {
339                         pr_err("%s: Cannot power on phy.\n",
340                                mmc_hostname(host->mmc));
341                         return;
342                 }
343
344                 sdhci_arasan->is_phy_on = true;
345         }
346 }
347
348 static void sdhci_arasan_hs400_enhanced_strobe(struct mmc_host *mmc,
349                                         struct mmc_ios *ios)
350 {
351         u32 vendor;
352         struct sdhci_host *host = mmc_priv(mmc);
353
354         vendor = sdhci_readl(host, SDHCI_ARASAN_VENDOR_REGISTER);
355         if (ios->enhanced_strobe)
356                 vendor |= VENDOR_ENHANCED_STROBE;
357         else
358                 vendor &= ~VENDOR_ENHANCED_STROBE;
359
360         sdhci_writel(host, vendor, SDHCI_ARASAN_VENDOR_REGISTER);
361 }
362
363 static void sdhci_arasan_reset(struct sdhci_host *host, u8 mask)
364 {
365         u8 ctrl;
366         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
367         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
368
369         sdhci_reset(host, mask);
370
371         if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_FORCE_CDTEST) {
372                 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
373                 ctrl |= SDHCI_CTRL_CDTEST_INS | SDHCI_CTRL_CDTEST_EN;
374                 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
375         }
376 }
377
378 static int sdhci_arasan_voltage_switch(struct mmc_host *mmc,
379                                        struct mmc_ios *ios)
380 {
381         switch (ios->signal_voltage) {
382         case MMC_SIGNAL_VOLTAGE_180:
383                 /*
384                  * Plese don't switch to 1V8 as arasan,5.1 doesn't
385                  * actually refer to this setting to indicate the
386                  * signal voltage and the state machine will be broken
387                  * actually if we force to enable 1V8. That's something
388                  * like broken quirk but we could work around here.
389                  */
390                 return 0;
391         case MMC_SIGNAL_VOLTAGE_330:
392         case MMC_SIGNAL_VOLTAGE_120:
393                 /* We don't support 3V3 and 1V2 */
394                 break;
395         }
396
397         return -EINVAL;
398 }
399
400 static const struct sdhci_ops sdhci_arasan_ops = {
401         .set_clock = sdhci_arasan_set_clock,
402         .get_max_clock = sdhci_pltfm_clk_get_max_clock,
403         .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
404         .set_bus_width = sdhci_set_bus_width,
405         .reset = sdhci_arasan_reset,
406         .set_uhs_signaling = sdhci_set_uhs_signaling,
407         .set_power = sdhci_set_power_and_bus_voltage,
408 };
409
410 static u32 sdhci_arasan_cqhci_irq(struct sdhci_host *host, u32 intmask)
411 {
412         int cmd_error = 0;
413         int data_error = 0;
414
415         if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
416                 return intmask;
417
418         cqhci_irq(host->mmc, intmask, cmd_error, data_error);
419
420         return 0;
421 }
422
423 static void sdhci_arasan_dumpregs(struct mmc_host *mmc)
424 {
425         sdhci_dumpregs(mmc_priv(mmc));
426 }
427
428 static void sdhci_arasan_cqe_enable(struct mmc_host *mmc)
429 {
430         struct sdhci_host *host = mmc_priv(mmc);
431         u32 reg;
432
433         reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
434         while (reg & SDHCI_DATA_AVAILABLE) {
435                 sdhci_readl(host, SDHCI_BUFFER);
436                 reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
437         }
438
439         sdhci_cqe_enable(mmc);
440 }
441
442 static const struct cqhci_host_ops sdhci_arasan_cqhci_ops = {
443         .enable         = sdhci_arasan_cqe_enable,
444         .disable        = sdhci_cqe_disable,
445         .dumpregs       = sdhci_arasan_dumpregs,
446 };
447
448 static const struct sdhci_ops sdhci_arasan_cqe_ops = {
449         .set_clock = sdhci_arasan_set_clock,
450         .get_max_clock = sdhci_pltfm_clk_get_max_clock,
451         .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
452         .set_bus_width = sdhci_set_bus_width,
453         .reset = sdhci_arasan_reset,
454         .set_uhs_signaling = sdhci_set_uhs_signaling,
455         .set_power = sdhci_set_power_and_bus_voltage,
456         .irq = sdhci_arasan_cqhci_irq,
457 };
458
459 static const struct sdhci_pltfm_data sdhci_arasan_cqe_pdata = {
460         .ops = &sdhci_arasan_cqe_ops,
461         .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
462         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
463                         SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
464 };
465
466 static const struct sdhci_pltfm_data sdhci_arasan_thunderbay_pdata = {
467         .ops = &sdhci_arasan_cqe_ops,
468         .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
469         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
470                 SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
471                 SDHCI_QUIRK2_STOP_WITH_TC |
472                 SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
473 };
474
475 #ifdef CONFIG_PM_SLEEP
476 /**
477  * sdhci_arasan_suspend - Suspend method for the driver
478  * @dev:        Address of the device structure
479  *
480  * Put the device in a low power state.
481  *
482  * Return: 0 on success and error value on error
483  */
484 static int sdhci_arasan_suspend(struct device *dev)
485 {
486         struct sdhci_host *host = dev_get_drvdata(dev);
487         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
488         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
489         int ret;
490
491         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
492                 mmc_retune_needed(host->mmc);
493
494         if (sdhci_arasan->has_cqe) {
495                 ret = cqhci_suspend(host->mmc);
496                 if (ret)
497                         return ret;
498         }
499
500         ret = sdhci_suspend_host(host);
501         if (ret)
502                 return ret;
503
504         if (!IS_ERR(sdhci_arasan->phy) && sdhci_arasan->is_phy_on) {
505                 ret = phy_power_off(sdhci_arasan->phy);
506                 if (ret) {
507                         dev_err(dev, "Cannot power off phy.\n");
508                         if (sdhci_resume_host(host))
509                                 dev_err(dev, "Cannot resume host.\n");
510
511                         return ret;
512                 }
513                 sdhci_arasan->is_phy_on = false;
514         }
515
516         clk_disable(pltfm_host->clk);
517         clk_disable(sdhci_arasan->clk_ahb);
518
519         return 0;
520 }
521
522 /**
523  * sdhci_arasan_resume - Resume method for the driver
524  * @dev:        Address of the device structure
525  *
526  * Resume operation after suspend
527  *
528  * Return: 0 on success and error value on error
529  */
530 static int sdhci_arasan_resume(struct device *dev)
531 {
532         struct sdhci_host *host = dev_get_drvdata(dev);
533         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
534         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
535         int ret;
536
537         ret = clk_enable(sdhci_arasan->clk_ahb);
538         if (ret) {
539                 dev_err(dev, "Cannot enable AHB clock.\n");
540                 return ret;
541         }
542
543         ret = clk_enable(pltfm_host->clk);
544         if (ret) {
545                 dev_err(dev, "Cannot enable SD clock.\n");
546                 return ret;
547         }
548
549         if (!IS_ERR(sdhci_arasan->phy) && host->mmc->actual_clock) {
550                 ret = phy_power_on(sdhci_arasan->phy);
551                 if (ret) {
552                         dev_err(dev, "Cannot power on phy.\n");
553                         return ret;
554                 }
555                 sdhci_arasan->is_phy_on = true;
556         }
557
558         ret = sdhci_resume_host(host);
559         if (ret) {
560                 dev_err(dev, "Cannot resume host.\n");
561                 return ret;
562         }
563
564         if (sdhci_arasan->has_cqe)
565                 return cqhci_resume(host->mmc);
566
567         return 0;
568 }
569 #endif /* ! CONFIG_PM_SLEEP */
570
571 static SIMPLE_DEV_PM_OPS(sdhci_arasan_dev_pm_ops, sdhci_arasan_suspend,
572                          sdhci_arasan_resume);
573
574 /**
575  * sdhci_arasan_sdcardclk_recalc_rate - Return the card clock rate
576  *
577  * @hw:                 Pointer to the hardware clock structure.
578  * @parent_rate:                The parent rate (should be rate of clk_xin).
579  *
580  * Return the current actual rate of the SD card clock.  This can be used
581  * to communicate with out PHY.
582  *
583  * Return: The card clock rate.
584  */
585 static unsigned long sdhci_arasan_sdcardclk_recalc_rate(struct clk_hw *hw,
586                                                       unsigned long parent_rate)
587 {
588         struct sdhci_arasan_clk_data *clk_data =
589                 container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
590         struct sdhci_arasan_data *sdhci_arasan =
591                 container_of(clk_data, struct sdhci_arasan_data, clk_data);
592         struct sdhci_host *host = sdhci_arasan->host;
593
594         return host->mmc->actual_clock;
595 }
596
597 static const struct clk_ops arasan_sdcardclk_ops = {
598         .recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
599 };
600
601 /**
602  * sdhci_arasan_sampleclk_recalc_rate - Return the sampling clock rate
603  *
604  * @hw:                 Pointer to the hardware clock structure.
605  * @parent_rate:                The parent rate (should be rate of clk_xin).
606  *
607  * Return the current actual rate of the sampling clock.  This can be used
608  * to communicate with out PHY.
609  *
610  * Return: The sample clock rate.
611  */
612 static unsigned long sdhci_arasan_sampleclk_recalc_rate(struct clk_hw *hw,
613                                                       unsigned long parent_rate)
614 {
615         struct sdhci_arasan_clk_data *clk_data =
616                 container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
617         struct sdhci_arasan_data *sdhci_arasan =
618                 container_of(clk_data, struct sdhci_arasan_data, clk_data);
619         struct sdhci_host *host = sdhci_arasan->host;
620
621         return host->mmc->actual_clock;
622 }
623
624 static const struct clk_ops arasan_sampleclk_ops = {
625         .recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
626 };
627
628 /**
629  * sdhci_zynqmp_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
630  *
631  * @hw:                 Pointer to the hardware clock structure.
632  * @degrees:            The clock phase shift between 0 - 359.
633  *
634  * Set the SD Output Clock Tap Delays for Output path
635  *
636  * Return: 0 on success and error value on error
637  */
638 static int sdhci_zynqmp_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
639 {
640         struct sdhci_arasan_clk_data *clk_data =
641                 container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
642         struct sdhci_arasan_data *sdhci_arasan =
643                 container_of(clk_data, struct sdhci_arasan_data, clk_data);
644         struct sdhci_host *host = sdhci_arasan->host;
645         const char *clk_name = clk_hw_get_name(hw);
646         u32 node_id = !strcmp(clk_name, "clk_out_sd0") ? NODE_SD_0 : NODE_SD_1;
647         u8 tap_delay, tap_max = 0;
648         int ret;
649
650         /* This is applicable for SDHCI_SPEC_300 and above */
651         if (host->version < SDHCI_SPEC_300)
652                 return 0;
653
654         switch (host->timing) {
655         case MMC_TIMING_MMC_HS:
656         case MMC_TIMING_SD_HS:
657         case MMC_TIMING_UHS_SDR25:
658         case MMC_TIMING_UHS_DDR50:
659         case MMC_TIMING_MMC_DDR52:
660                 /* For 50MHz clock, 30 Taps are available */
661                 tap_max = 30;
662                 break;
663         case MMC_TIMING_UHS_SDR50:
664                 /* For 100MHz clock, 15 Taps are available */
665                 tap_max = 15;
666                 break;
667         case MMC_TIMING_UHS_SDR104:
668         case MMC_TIMING_MMC_HS200:
669                 /* For 200MHz clock, 8 Taps are available */
670                 tap_max = 8;
671                 break;
672         default:
673                 break;
674         }
675
676         tap_delay = (degrees * tap_max) / 360;
677
678         /* Set the Clock Phase */
679         ret = zynqmp_pm_set_sd_tapdelay(node_id, PM_TAPDELAY_OUTPUT, tap_delay);
680         if (ret)
681                 pr_err("Error setting Output Tap Delay\n");
682
683         /* Release DLL Reset */
684         zynqmp_pm_sd_dll_reset(node_id, PM_DLL_RESET_RELEASE);
685
686         return ret;
687 }
688
689 static const struct clk_ops zynqmp_sdcardclk_ops = {
690         .recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
691         .set_phase = sdhci_zynqmp_sdcardclk_set_phase,
692 };
693
694 /**
695  * sdhci_zynqmp_sampleclk_set_phase - Set the SD Input Clock Tap Delays
696  *
697  * @hw:                 Pointer to the hardware clock structure.
698  * @degrees:            The clock phase shift between 0 - 359.
699  *
700  * Set the SD Input Clock Tap Delays for Input path
701  *
702  * Return: 0 on success and error value on error
703  */
704 static int sdhci_zynqmp_sampleclk_set_phase(struct clk_hw *hw, int degrees)
705 {
706         struct sdhci_arasan_clk_data *clk_data =
707                 container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
708         struct sdhci_arasan_data *sdhci_arasan =
709                 container_of(clk_data, struct sdhci_arasan_data, clk_data);
710         struct sdhci_host *host = sdhci_arasan->host;
711         const char *clk_name = clk_hw_get_name(hw);
712         u32 node_id = !strcmp(clk_name, "clk_in_sd0") ? NODE_SD_0 : NODE_SD_1;
713         u8 tap_delay, tap_max = 0;
714         int ret;
715
716         /* This is applicable for SDHCI_SPEC_300 and above */
717         if (host->version < SDHCI_SPEC_300)
718                 return 0;
719
720         /* Assert DLL Reset */
721         zynqmp_pm_sd_dll_reset(node_id, PM_DLL_RESET_ASSERT);
722
723         switch (host->timing) {
724         case MMC_TIMING_MMC_HS:
725         case MMC_TIMING_SD_HS:
726         case MMC_TIMING_UHS_SDR25:
727         case MMC_TIMING_UHS_DDR50:
728         case MMC_TIMING_MMC_DDR52:
729                 /* For 50MHz clock, 120 Taps are available */
730                 tap_max = 120;
731                 break;
732         case MMC_TIMING_UHS_SDR50:
733                 /* For 100MHz clock, 60 Taps are available */
734                 tap_max = 60;
735                 break;
736         case MMC_TIMING_UHS_SDR104:
737         case MMC_TIMING_MMC_HS200:
738                 /* For 200MHz clock, 30 Taps are available */
739                 tap_max = 30;
740                 break;
741         default:
742                 break;
743         }
744
745         tap_delay = (degrees * tap_max) / 360;
746
747         /* Set the Clock Phase */
748         ret = zynqmp_pm_set_sd_tapdelay(node_id, PM_TAPDELAY_INPUT, tap_delay);
749         if (ret)
750                 pr_err("Error setting Input Tap Delay\n");
751
752         return ret;
753 }
754
755 static const struct clk_ops zynqmp_sampleclk_ops = {
756         .recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
757         .set_phase = sdhci_zynqmp_sampleclk_set_phase,
758 };
759
760 /**
761  * sdhci_versal_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
762  *
763  * @hw:                 Pointer to the hardware clock structure.
764  * @degrees:            The clock phase shift between 0 - 359.
765  *
766  * Set the SD Output Clock Tap Delays for Output path
767  *
768  * Return: 0 on success and error value on error
769  */
770 static int sdhci_versal_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
771 {
772         struct sdhci_arasan_clk_data *clk_data =
773                 container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
774         struct sdhci_arasan_data *sdhci_arasan =
775                 container_of(clk_data, struct sdhci_arasan_data, clk_data);
776         struct sdhci_host *host = sdhci_arasan->host;
777         u8 tap_delay, tap_max = 0;
778
779         /* This is applicable for SDHCI_SPEC_300 and above */
780         if (host->version < SDHCI_SPEC_300)
781                 return 0;
782
783         switch (host->timing) {
784         case MMC_TIMING_MMC_HS:
785         case MMC_TIMING_SD_HS:
786         case MMC_TIMING_UHS_SDR25:
787         case MMC_TIMING_UHS_DDR50:
788         case MMC_TIMING_MMC_DDR52:
789                 /* For 50MHz clock, 30 Taps are available */
790                 tap_max = 30;
791                 break;
792         case MMC_TIMING_UHS_SDR50:
793                 /* For 100MHz clock, 15 Taps are available */
794                 tap_max = 15;
795                 break;
796         case MMC_TIMING_UHS_SDR104:
797         case MMC_TIMING_MMC_HS200:
798                 /* For 200MHz clock, 8 Taps are available */
799                 tap_max = 8;
800                 break;
801         default:
802                 break;
803         }
804
805         tap_delay = (degrees * tap_max) / 360;
806
807         /* Set the Clock Phase */
808         if (tap_delay) {
809                 u32 regval;
810
811                 regval = sdhci_readl(host, SDHCI_ARASAN_OTAPDLY_REGISTER);
812                 regval |= SDHCI_OTAPDLY_ENABLE;
813                 sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
814                 regval &= ~SDHCI_ARASAN_OTAPDLY_SEL_MASK;
815                 regval |= tap_delay;
816                 sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
817         }
818
819         return 0;
820 }
821
822 static const struct clk_ops versal_sdcardclk_ops = {
823         .recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
824         .set_phase = sdhci_versal_sdcardclk_set_phase,
825 };
826
827 /**
828  * sdhci_versal_sampleclk_set_phase - Set the SD Input Clock Tap Delays
829  *
830  * @hw:                 Pointer to the hardware clock structure.
831  * @degrees:            The clock phase shift between 0 - 359.
832  *
833  * Set the SD Input Clock Tap Delays for Input path
834  *
835  * Return: 0 on success and error value on error
836  */
837 static int sdhci_versal_sampleclk_set_phase(struct clk_hw *hw, int degrees)
838 {
839         struct sdhci_arasan_clk_data *clk_data =
840                 container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
841         struct sdhci_arasan_data *sdhci_arasan =
842                 container_of(clk_data, struct sdhci_arasan_data, clk_data);
843         struct sdhci_host *host = sdhci_arasan->host;
844         u8 tap_delay, tap_max = 0;
845
846         /* This is applicable for SDHCI_SPEC_300 and above */
847         if (host->version < SDHCI_SPEC_300)
848                 return 0;
849
850         switch (host->timing) {
851         case MMC_TIMING_MMC_HS:
852         case MMC_TIMING_SD_HS:
853         case MMC_TIMING_UHS_SDR25:
854         case MMC_TIMING_UHS_DDR50:
855         case MMC_TIMING_MMC_DDR52:
856                 /* For 50MHz clock, 120 Taps are available */
857                 tap_max = 120;
858                 break;
859         case MMC_TIMING_UHS_SDR50:
860                 /* For 100MHz clock, 60 Taps are available */
861                 tap_max = 60;
862                 break;
863         case MMC_TIMING_UHS_SDR104:
864         case MMC_TIMING_MMC_HS200:
865                 /* For 200MHz clock, 30 Taps are available */
866                 tap_max = 30;
867                 break;
868         default:
869                 break;
870         }
871
872         tap_delay = (degrees * tap_max) / 360;
873
874         /* Set the Clock Phase */
875         if (tap_delay) {
876                 u32 regval;
877
878                 regval = sdhci_readl(host, SDHCI_ARASAN_ITAPDLY_REGISTER);
879                 regval |= SDHCI_ITAPDLY_CHGWIN;
880                 sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
881                 regval |= SDHCI_ITAPDLY_ENABLE;
882                 sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
883                 regval &= ~SDHCI_ARASAN_ITAPDLY_SEL_MASK;
884                 regval |= tap_delay;
885                 sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
886                 regval &= ~SDHCI_ITAPDLY_CHGWIN;
887                 sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
888         }
889
890         return 0;
891 }
892
893 static const struct clk_ops versal_sampleclk_ops = {
894         .recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
895         .set_phase = sdhci_versal_sampleclk_set_phase,
896 };
897
898 static void arasan_zynqmp_dll_reset(struct sdhci_host *host, u32 deviceid)
899 {
900         u16 clk;
901
902         clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
903         clk &= ~(SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_INT_EN);
904         sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
905
906         /* Issue DLL Reset */
907         zynqmp_pm_sd_dll_reset(deviceid, PM_DLL_RESET_PULSE);
908
909         clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
910
911         sdhci_enable_clk(host, clk);
912 }
913
914 static int arasan_zynqmp_execute_tuning(struct mmc_host *mmc, u32 opcode)
915 {
916         struct sdhci_host *host = mmc_priv(mmc);
917         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
918         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
919         struct clk_hw *hw = &sdhci_arasan->clk_data.sdcardclk_hw;
920         const char *clk_name = clk_hw_get_name(hw);
921         u32 device_id = !strcmp(clk_name, "clk_out_sd0") ? NODE_SD_0 :
922                                                            NODE_SD_1;
923         int err;
924
925         /* ZynqMP SD controller does not perform auto tuning in DDR50 mode */
926         if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
927                 return 0;
928
929         arasan_zynqmp_dll_reset(host, device_id);
930
931         err = sdhci_execute_tuning(mmc, opcode);
932         if (err)
933                 return err;
934
935         arasan_zynqmp_dll_reset(host, device_id);
936
937         return 0;
938 }
939
940 /**
941  * sdhci_arasan_update_clockmultiplier - Set corecfg_clockmultiplier
942  *
943  * @host:               The sdhci_host
944  * @value:              The value to write
945  *
946  * The corecfg_clockmultiplier is supposed to contain clock multiplier
947  * value of programmable clock generator.
948  *
949  * NOTES:
950  * - Many existing devices don't seem to do this and work fine.  To keep
951  *   compatibility for old hardware where the device tree doesn't provide a
952  *   register map, this function is a noop if a soc_ctl_map hasn't been provided
953  *   for this platform.
954  * - The value of corecfg_clockmultiplier should sync with that of corresponding
955  *   value reading from sdhci_capability_register. So this function is called
956  *   once at probe time and never called again.
957  */
958 static void sdhci_arasan_update_clockmultiplier(struct sdhci_host *host,
959                                                 u32 value)
960 {
961         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
962         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
963         const struct sdhci_arasan_soc_ctl_map *soc_ctl_map =
964                 sdhci_arasan->soc_ctl_map;
965
966         /* Having a map is optional */
967         if (!soc_ctl_map)
968                 return;
969
970         /* If we have a map, we expect to have a syscon */
971         if (!sdhci_arasan->soc_ctl_base) {
972                 pr_warn("%s: Have regmap, but no soc-ctl-syscon\n",
973                         mmc_hostname(host->mmc));
974                 return;
975         }
976
977         sdhci_arasan_syscon_write(host, &soc_ctl_map->clockmultiplier, value);
978 }
979
980 /**
981  * sdhci_arasan_update_baseclkfreq - Set corecfg_baseclkfreq
982  *
983  * @host:               The sdhci_host
984  *
985  * The corecfg_baseclkfreq is supposed to contain the MHz of clk_xin.  This
986  * function can be used to make that happen.
987  *
988  * NOTES:
989  * - Many existing devices don't seem to do this and work fine.  To keep
990  *   compatibility for old hardware where the device tree doesn't provide a
991  *   register map, this function is a noop if a soc_ctl_map hasn't been provided
992  *   for this platform.
993  * - It's assumed that clk_xin is not dynamic and that we use the SDHCI divider
994  *   to achieve lower clock rates.  That means that this function is called once
995  *   at probe time and never called again.
996  */
997 static void sdhci_arasan_update_baseclkfreq(struct sdhci_host *host)
998 {
999         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1000         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
1001         const struct sdhci_arasan_soc_ctl_map *soc_ctl_map =
1002                 sdhci_arasan->soc_ctl_map;
1003         u32 mhz = DIV_ROUND_CLOSEST_ULL(clk_get_rate(pltfm_host->clk), 1000000);
1004
1005         /* Having a map is optional */
1006         if (!soc_ctl_map)
1007                 return;
1008
1009         /* If we have a map, we expect to have a syscon */
1010         if (!sdhci_arasan->soc_ctl_base) {
1011                 pr_warn("%s: Have regmap, but no soc-ctl-syscon\n",
1012                         mmc_hostname(host->mmc));
1013                 return;
1014         }
1015
1016         sdhci_arasan_syscon_write(host, &soc_ctl_map->baseclkfreq, mhz);
1017 }
1018
1019 static void sdhci_arasan_set_clk_delays(struct sdhci_host *host)
1020 {
1021         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1022         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
1023         struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
1024
1025         clk_set_phase(clk_data->sampleclk,
1026                       clk_data->clk_phase_in[host->timing]);
1027         clk_set_phase(clk_data->sdcardclk,
1028                       clk_data->clk_phase_out[host->timing]);
1029 }
1030
1031 static void arasan_dt_read_clk_phase(struct device *dev,
1032                                      struct sdhci_arasan_clk_data *clk_data,
1033                                      unsigned int timing, const char *prop)
1034 {
1035         struct device_node *np = dev->of_node;
1036
1037         u32 clk_phase[2] = {0};
1038         int ret;
1039
1040         /*
1041          * Read Tap Delay values from DT, if the DT does not contain the
1042          * Tap Values then use the pre-defined values.
1043          */
1044         ret = of_property_read_variable_u32_array(np, prop, &clk_phase[0],
1045                                                   2, 0);
1046         if (ret < 0) {
1047                 dev_dbg(dev, "Using predefined clock phase for %s = %d %d\n",
1048                         prop, clk_data->clk_phase_in[timing],
1049                         clk_data->clk_phase_out[timing]);
1050                 return;
1051         }
1052
1053         /* The values read are Input and Output Clock Delays in order */
1054         clk_data->clk_phase_in[timing] = clk_phase[0];
1055         clk_data->clk_phase_out[timing] = clk_phase[1];
1056 }
1057
1058 /**
1059  * arasan_dt_parse_clk_phases - Read Clock Delay values from DT
1060  *
1061  * @dev:                Pointer to our struct device.
1062  * @clk_data:           Pointer to the Clock Data structure
1063  *
1064  * Called at initialization to parse the values of Clock Delays.
1065  */
1066 static void arasan_dt_parse_clk_phases(struct device *dev,
1067                                        struct sdhci_arasan_clk_data *clk_data)
1068 {
1069         u32 mio_bank = 0;
1070         int i;
1071
1072         /*
1073          * This has been kept as a pointer and is assigned a function here.
1074          * So that different controller variants can assign their own handling
1075          * function.
1076          */
1077         clk_data->set_clk_delays = sdhci_arasan_set_clk_delays;
1078
1079         if (of_device_is_compatible(dev->of_node, "xlnx,zynqmp-8.9a")) {
1080                 u32 zynqmp_iclk_phase[MMC_TIMING_MMC_HS400 + 1] =
1081                         ZYNQMP_ICLK_PHASE;
1082                 u32 zynqmp_oclk_phase[MMC_TIMING_MMC_HS400 + 1] =
1083                         ZYNQMP_OCLK_PHASE;
1084
1085                 of_property_read_u32(dev->of_node, "xlnx,mio-bank", &mio_bank);
1086                 if (mio_bank == 2) {
1087                         zynqmp_oclk_phase[MMC_TIMING_UHS_SDR104] = 90;
1088                         zynqmp_oclk_phase[MMC_TIMING_MMC_HS200] = 90;
1089                 }
1090
1091                 for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
1092                         clk_data->clk_phase_in[i] = zynqmp_iclk_phase[i];
1093                         clk_data->clk_phase_out[i] = zynqmp_oclk_phase[i];
1094                 }
1095         }
1096
1097         if (of_device_is_compatible(dev->of_node, "xlnx,versal-8.9a")) {
1098                 u32 versal_iclk_phase[MMC_TIMING_MMC_HS400 + 1] =
1099                         VERSAL_ICLK_PHASE;
1100                 u32 versal_oclk_phase[MMC_TIMING_MMC_HS400 + 1] =
1101                         VERSAL_OCLK_PHASE;
1102
1103                 for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
1104                         clk_data->clk_phase_in[i] = versal_iclk_phase[i];
1105                         clk_data->clk_phase_out[i] = versal_oclk_phase[i];
1106                 }
1107         }
1108
1109         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_LEGACY,
1110                                  "clk-phase-legacy");
1111         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS,
1112                                  "clk-phase-mmc-hs");
1113         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_SD_HS,
1114                                  "clk-phase-sd-hs");
1115         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR12,
1116                                  "clk-phase-uhs-sdr12");
1117         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR25,
1118                                  "clk-phase-uhs-sdr25");
1119         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR50,
1120                                  "clk-phase-uhs-sdr50");
1121         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR104,
1122                                  "clk-phase-uhs-sdr104");
1123         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_DDR50,
1124                                  "clk-phase-uhs-ddr50");
1125         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_DDR52,
1126                                  "clk-phase-mmc-ddr52");
1127         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS200,
1128                                  "clk-phase-mmc-hs200");
1129         arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS400,
1130                                  "clk-phase-mmc-hs400");
1131 }
1132
1133 static const struct sdhci_pltfm_data sdhci_arasan_pdata = {
1134         .ops = &sdhci_arasan_ops,
1135         .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
1136         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1137                         SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
1138                         SDHCI_QUIRK2_STOP_WITH_TC,
1139 };
1140
1141 static const struct sdhci_arasan_clk_ops arasan_clk_ops = {
1142         .sdcardclk_ops = &arasan_sdcardclk_ops,
1143         .sampleclk_ops = &arasan_sampleclk_ops,
1144 };
1145
1146 static struct sdhci_arasan_of_data sdhci_arasan_generic_data = {
1147         .pdata = &sdhci_arasan_pdata,
1148         .clk_ops = &arasan_clk_ops,
1149 };
1150
1151 static const struct sdhci_arasan_of_data sdhci_arasan_thunderbay_data = {
1152         .soc_ctl_map = &thunderbay_soc_ctl_map,
1153         .pdata = &sdhci_arasan_thunderbay_pdata,
1154         .clk_ops = &arasan_clk_ops,
1155 };
1156
1157 static const struct sdhci_pltfm_data sdhci_keembay_emmc_pdata = {
1158         .ops = &sdhci_arasan_cqe_ops,
1159         .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
1160                 SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1161                 SDHCI_QUIRK_NO_LED |
1162                 SDHCI_QUIRK_32BIT_DMA_ADDR |
1163                 SDHCI_QUIRK_32BIT_DMA_SIZE |
1164                 SDHCI_QUIRK_32BIT_ADMA_SIZE,
1165         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1166                 SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
1167                 SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
1168                 SDHCI_QUIRK2_STOP_WITH_TC |
1169                 SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
1170 };
1171
1172 static const struct sdhci_pltfm_data sdhci_keembay_sd_pdata = {
1173         .ops = &sdhci_arasan_ops,
1174         .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
1175                 SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1176                 SDHCI_QUIRK_NO_LED |
1177                 SDHCI_QUIRK_32BIT_DMA_ADDR |
1178                 SDHCI_QUIRK_32BIT_DMA_SIZE |
1179                 SDHCI_QUIRK_32BIT_ADMA_SIZE,
1180         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1181                 SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
1182                 SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
1183                 SDHCI_QUIRK2_STOP_WITH_TC |
1184                 SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
1185 };
1186
1187 static const struct sdhci_pltfm_data sdhci_keembay_sdio_pdata = {
1188         .ops = &sdhci_arasan_ops,
1189         .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
1190                 SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1191                 SDHCI_QUIRK_NO_LED |
1192                 SDHCI_QUIRK_32BIT_DMA_ADDR |
1193                 SDHCI_QUIRK_32BIT_DMA_SIZE |
1194                 SDHCI_QUIRK_32BIT_ADMA_SIZE,
1195         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1196                 SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
1197                 SDHCI_QUIRK2_HOST_OFF_CARD_ON |
1198                 SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
1199 };
1200
1201 static struct sdhci_arasan_of_data sdhci_arasan_rk3399_data = {
1202         .soc_ctl_map = &rk3399_soc_ctl_map,
1203         .pdata = &sdhci_arasan_cqe_pdata,
1204         .clk_ops = &arasan_clk_ops,
1205 };
1206
1207 static struct sdhci_arasan_of_data intel_lgm_emmc_data = {
1208         .soc_ctl_map = &intel_lgm_emmc_soc_ctl_map,
1209         .pdata = &sdhci_arasan_cqe_pdata,
1210         .clk_ops = &arasan_clk_ops,
1211 };
1212
1213 static struct sdhci_arasan_of_data intel_lgm_sdxc_data = {
1214         .soc_ctl_map = &intel_lgm_sdxc_soc_ctl_map,
1215         .pdata = &sdhci_arasan_cqe_pdata,
1216         .clk_ops = &arasan_clk_ops,
1217 };
1218
1219 static const struct sdhci_pltfm_data sdhci_arasan_zynqmp_pdata = {
1220         .ops = &sdhci_arasan_ops,
1221         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1222                         SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
1223                         SDHCI_QUIRK2_STOP_WITH_TC,
1224 };
1225
1226 static const struct sdhci_arasan_clk_ops zynqmp_clk_ops = {
1227         .sdcardclk_ops = &zynqmp_sdcardclk_ops,
1228         .sampleclk_ops = &zynqmp_sampleclk_ops,
1229 };
1230
1231 static struct sdhci_arasan_of_data sdhci_arasan_zynqmp_data = {
1232         .pdata = &sdhci_arasan_zynqmp_pdata,
1233         .clk_ops = &zynqmp_clk_ops,
1234 };
1235
1236 static const struct sdhci_arasan_clk_ops versal_clk_ops = {
1237         .sdcardclk_ops = &versal_sdcardclk_ops,
1238         .sampleclk_ops = &versal_sampleclk_ops,
1239 };
1240
1241 static struct sdhci_arasan_of_data sdhci_arasan_versal_data = {
1242         .pdata = &sdhci_arasan_zynqmp_pdata,
1243         .clk_ops = &versal_clk_ops,
1244 };
1245
1246 static struct sdhci_arasan_of_data intel_keembay_emmc_data = {
1247         .soc_ctl_map = &intel_keembay_soc_ctl_map,
1248         .pdata = &sdhci_keembay_emmc_pdata,
1249         .clk_ops = &arasan_clk_ops,
1250 };
1251
1252 static struct sdhci_arasan_of_data intel_keembay_sd_data = {
1253         .soc_ctl_map = &intel_keembay_soc_ctl_map,
1254         .pdata = &sdhci_keembay_sd_pdata,
1255         .clk_ops = &arasan_clk_ops,
1256 };
1257
1258 static struct sdhci_arasan_of_data intel_keembay_sdio_data = {
1259         .soc_ctl_map = &intel_keembay_soc_ctl_map,
1260         .pdata = &sdhci_keembay_sdio_pdata,
1261         .clk_ops = &arasan_clk_ops,
1262 };
1263
1264 static const struct of_device_id sdhci_arasan_of_match[] = {
1265         /* SoC-specific compatible strings w/ soc_ctl_map */
1266         {
1267                 .compatible = "rockchip,rk3399-sdhci-5.1",
1268                 .data = &sdhci_arasan_rk3399_data,
1269         },
1270         {
1271                 .compatible = "intel,lgm-sdhci-5.1-emmc",
1272                 .data = &intel_lgm_emmc_data,
1273         },
1274         {
1275                 .compatible = "intel,lgm-sdhci-5.1-sdxc",
1276                 .data = &intel_lgm_sdxc_data,
1277         },
1278         {
1279                 .compatible = "intel,keembay-sdhci-5.1-emmc",
1280                 .data = &intel_keembay_emmc_data,
1281         },
1282         {
1283                 .compatible = "intel,keembay-sdhci-5.1-sd",
1284                 .data = &intel_keembay_sd_data,
1285         },
1286         {
1287                 .compatible = "intel,keembay-sdhci-5.1-sdio",
1288                 .data = &intel_keembay_sdio_data,
1289         },
1290         {
1291                 .compatible = "intel,thunderbay-sdhci-5.1",
1292                 .data = &sdhci_arasan_thunderbay_data,
1293         },
1294         /* Generic compatible below here */
1295         {
1296                 .compatible = "arasan,sdhci-8.9a",
1297                 .data = &sdhci_arasan_generic_data,
1298         },
1299         {
1300                 .compatible = "arasan,sdhci-5.1",
1301                 .data = &sdhci_arasan_generic_data,
1302         },
1303         {
1304                 .compatible = "arasan,sdhci-4.9a",
1305                 .data = &sdhci_arasan_generic_data,
1306         },
1307         {
1308                 .compatible = "xlnx,zynqmp-8.9a",
1309                 .data = &sdhci_arasan_zynqmp_data,
1310         },
1311         {
1312                 .compatible = "xlnx,versal-8.9a",
1313                 .data = &sdhci_arasan_versal_data,
1314         },
1315         { /* sentinel */ }
1316 };
1317 MODULE_DEVICE_TABLE(of, sdhci_arasan_of_match);
1318
1319 /**
1320  * sdhci_arasan_register_sdcardclk - Register the sdcardclk for a PHY to use
1321  *
1322  * @sdhci_arasan:       Our private data structure.
1323  * @clk_xin:            Pointer to the functional clock
1324  * @dev:                Pointer to our struct device.
1325  *
1326  * Some PHY devices need to know what the actual card clock is.  In order for
1327  * them to find out, we'll provide a clock through the common clock framework
1328  * for them to query.
1329  *
1330  * Return: 0 on success and error value on error
1331  */
1332 static int
1333 sdhci_arasan_register_sdcardclk(struct sdhci_arasan_data *sdhci_arasan,
1334                                 struct clk *clk_xin,
1335                                 struct device *dev)
1336 {
1337         struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
1338         struct device_node *np = dev->of_node;
1339         struct clk_init_data sdcardclk_init;
1340         const char *parent_clk_name;
1341         int ret;
1342
1343         ret = of_property_read_string_index(np, "clock-output-names", 0,
1344                                             &sdcardclk_init.name);
1345         if (ret) {
1346                 dev_err(dev, "DT has #clock-cells but no clock-output-names\n");
1347                 return ret;
1348         }
1349
1350         parent_clk_name = __clk_get_name(clk_xin);
1351         sdcardclk_init.parent_names = &parent_clk_name;
1352         sdcardclk_init.num_parents = 1;
1353         sdcardclk_init.flags = CLK_GET_RATE_NOCACHE;
1354         sdcardclk_init.ops = sdhci_arasan->clk_ops->sdcardclk_ops;
1355
1356         clk_data->sdcardclk_hw.init = &sdcardclk_init;
1357         clk_data->sdcardclk =
1358                 devm_clk_register(dev, &clk_data->sdcardclk_hw);
1359         if (IS_ERR(clk_data->sdcardclk))
1360                 return PTR_ERR(clk_data->sdcardclk);
1361         clk_data->sdcardclk_hw.init = NULL;
1362
1363         ret = of_clk_add_provider(np, of_clk_src_simple_get,
1364                                   clk_data->sdcardclk);
1365         if (ret)
1366                 dev_err(dev, "Failed to add sdcard clock provider\n");
1367
1368         return ret;
1369 }
1370
1371 /**
1372  * sdhci_arasan_register_sampleclk - Register the sampleclk for a PHY to use
1373  *
1374  * @sdhci_arasan:       Our private data structure.
1375  * @clk_xin:            Pointer to the functional clock
1376  * @dev:                Pointer to our struct device.
1377  *
1378  * Some PHY devices need to know what the actual card clock is.  In order for
1379  * them to find out, we'll provide a clock through the common clock framework
1380  * for them to query.
1381  *
1382  * Return: 0 on success and error value on error
1383  */
1384 static int
1385 sdhci_arasan_register_sampleclk(struct sdhci_arasan_data *sdhci_arasan,
1386                                 struct clk *clk_xin,
1387                                 struct device *dev)
1388 {
1389         struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
1390         struct device_node *np = dev->of_node;
1391         struct clk_init_data sampleclk_init;
1392         const char *parent_clk_name;
1393         int ret;
1394
1395         ret = of_property_read_string_index(np, "clock-output-names", 1,
1396                                             &sampleclk_init.name);
1397         if (ret) {
1398                 dev_err(dev, "DT has #clock-cells but no clock-output-names\n");
1399                 return ret;
1400         }
1401
1402         parent_clk_name = __clk_get_name(clk_xin);
1403         sampleclk_init.parent_names = &parent_clk_name;
1404         sampleclk_init.num_parents = 1;
1405         sampleclk_init.flags = CLK_GET_RATE_NOCACHE;
1406         sampleclk_init.ops = sdhci_arasan->clk_ops->sampleclk_ops;
1407
1408         clk_data->sampleclk_hw.init = &sampleclk_init;
1409         clk_data->sampleclk =
1410                 devm_clk_register(dev, &clk_data->sampleclk_hw);
1411         if (IS_ERR(clk_data->sampleclk))
1412                 return PTR_ERR(clk_data->sampleclk);
1413         clk_data->sampleclk_hw.init = NULL;
1414
1415         ret = of_clk_add_provider(np, of_clk_src_simple_get,
1416                                   clk_data->sampleclk);
1417         if (ret)
1418                 dev_err(dev, "Failed to add sample clock provider\n");
1419
1420         return ret;
1421 }
1422
1423 /**
1424  * sdhci_arasan_unregister_sdclk - Undoes sdhci_arasan_register_sdclk()
1425  *
1426  * @dev:                Pointer to our struct device.
1427  *
1428  * Should be called any time we're exiting and sdhci_arasan_register_sdclk()
1429  * returned success.
1430  */
1431 static void sdhci_arasan_unregister_sdclk(struct device *dev)
1432 {
1433         struct device_node *np = dev->of_node;
1434
1435         if (!of_find_property(np, "#clock-cells", NULL))
1436                 return;
1437
1438         of_clk_del_provider(dev->of_node);
1439 }
1440
1441 /**
1442  * sdhci_arasan_update_support64b - Set SUPPORT_64B (64-bit System Bus Support)
1443  * @host:               The sdhci_host
1444  * @value:              The value to write
1445  *
1446  * This should be set based on the System Address Bus.
1447  * 0: the Core supports only 32-bit System Address Bus.
1448  * 1: the Core supports 64-bit System Address Bus.
1449  *
1450  * NOTE:
1451  * For Keem Bay, it is required to clear this bit. Its default value is 1'b1.
1452  * Keem Bay does not support 64-bit access.
1453  */
1454 static void sdhci_arasan_update_support64b(struct sdhci_host *host, u32 value)
1455 {
1456         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1457         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
1458         const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
1459
1460         /* Having a map is optional */
1461         soc_ctl_map = sdhci_arasan->soc_ctl_map;
1462         if (!soc_ctl_map)
1463                 return;
1464
1465         /* If we have a map, we expect to have a syscon */
1466         if (!sdhci_arasan->soc_ctl_base) {
1467                 pr_warn("%s: Have regmap, but no soc-ctl-syscon\n",
1468                         mmc_hostname(host->mmc));
1469                 return;
1470         }
1471
1472         sdhci_arasan_syscon_write(host, &soc_ctl_map->support64b, value);
1473 }
1474
1475 /**
1476  * sdhci_arasan_register_sdclk - Register the sdcardclk for a PHY to use
1477  *
1478  * @sdhci_arasan:       Our private data structure.
1479  * @clk_xin:            Pointer to the functional clock
1480  * @dev:                Pointer to our struct device.
1481  *
1482  * Some PHY devices need to know what the actual card clock is.  In order for
1483  * them to find out, we'll provide a clock through the common clock framework
1484  * for them to query.
1485  *
1486  * Note: without seriously re-architecting SDHCI's clock code and testing on
1487  * all platforms, there's no way to create a totally beautiful clock here
1488  * with all clock ops implemented.  Instead, we'll just create a clock that can
1489  * be queried and set the CLK_GET_RATE_NOCACHE attribute to tell common clock
1490  * framework that we're doing things behind its back.  This should be sufficient
1491  * to create nice clean device tree bindings and later (if needed) we can try
1492  * re-architecting SDHCI if we see some benefit to it.
1493  *
1494  * Return: 0 on success and error value on error
1495  */
1496 static int sdhci_arasan_register_sdclk(struct sdhci_arasan_data *sdhci_arasan,
1497                                        struct clk *clk_xin,
1498                                        struct device *dev)
1499 {
1500         struct device_node *np = dev->of_node;
1501         u32 num_clks = 0;
1502         int ret;
1503
1504         /* Providing a clock to the PHY is optional; no error if missing */
1505         if (of_property_read_u32(np, "#clock-cells", &num_clks) < 0)
1506                 return 0;
1507
1508         ret = sdhci_arasan_register_sdcardclk(sdhci_arasan, clk_xin, dev);
1509         if (ret)
1510                 return ret;
1511
1512         if (num_clks) {
1513                 ret = sdhci_arasan_register_sampleclk(sdhci_arasan, clk_xin,
1514                                                       dev);
1515                 if (ret) {
1516                         sdhci_arasan_unregister_sdclk(dev);
1517                         return ret;
1518                 }
1519         }
1520
1521         return 0;
1522 }
1523
1524 static int sdhci_arasan_add_host(struct sdhci_arasan_data *sdhci_arasan)
1525 {
1526         struct sdhci_host *host = sdhci_arasan->host;
1527         struct cqhci_host *cq_host;
1528         bool dma64;
1529         int ret;
1530
1531         if (!sdhci_arasan->has_cqe)
1532                 return sdhci_add_host(host);
1533
1534         ret = sdhci_setup_host(host);
1535         if (ret)
1536                 return ret;
1537
1538         cq_host = devm_kzalloc(host->mmc->parent,
1539                                sizeof(*cq_host), GFP_KERNEL);
1540         if (!cq_host) {
1541                 ret = -ENOMEM;
1542                 goto cleanup;
1543         }
1544
1545         cq_host->mmio = host->ioaddr + SDHCI_ARASAN_CQE_BASE_ADDR;
1546         cq_host->ops = &sdhci_arasan_cqhci_ops;
1547
1548         dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
1549         if (dma64)
1550                 cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
1551
1552         ret = cqhci_init(cq_host, host->mmc, dma64);
1553         if (ret)
1554                 goto cleanup;
1555
1556         ret = __sdhci_add_host(host);
1557         if (ret)
1558                 goto cleanup;
1559
1560         return 0;
1561
1562 cleanup:
1563         sdhci_cleanup_host(host);
1564         return ret;
1565 }
1566
1567 static int sdhci_arasan_probe(struct platform_device *pdev)
1568 {
1569         int ret;
1570         struct device_node *node;
1571         struct clk *clk_xin;
1572         struct sdhci_host *host;
1573         struct sdhci_pltfm_host *pltfm_host;
1574         struct device *dev = &pdev->dev;
1575         struct device_node *np = dev->of_node;
1576         struct sdhci_arasan_data *sdhci_arasan;
1577         const struct sdhci_arasan_of_data *data;
1578
1579         data = of_device_get_match_data(dev);
1580         if (!data)
1581                 return -EINVAL;
1582
1583         host = sdhci_pltfm_init(pdev, data->pdata, sizeof(*sdhci_arasan));
1584
1585         if (IS_ERR(host))
1586                 return PTR_ERR(host);
1587
1588         pltfm_host = sdhci_priv(host);
1589         sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
1590         sdhci_arasan->host = host;
1591
1592         sdhci_arasan->soc_ctl_map = data->soc_ctl_map;
1593         sdhci_arasan->clk_ops = data->clk_ops;
1594
1595         node = of_parse_phandle(np, "arasan,soc-ctl-syscon", 0);
1596         if (node) {
1597                 sdhci_arasan->soc_ctl_base = syscon_node_to_regmap(node);
1598                 of_node_put(node);
1599
1600                 if (IS_ERR(sdhci_arasan->soc_ctl_base)) {
1601                         ret = dev_err_probe(dev,
1602                                             PTR_ERR(sdhci_arasan->soc_ctl_base),
1603                                             "Can't get syscon\n");
1604                         goto err_pltfm_free;
1605                 }
1606         }
1607
1608         sdhci_get_of_property(pdev);
1609
1610         sdhci_arasan->clk_ahb = devm_clk_get(dev, "clk_ahb");
1611         if (IS_ERR(sdhci_arasan->clk_ahb)) {
1612                 ret = dev_err_probe(dev, PTR_ERR(sdhci_arasan->clk_ahb),
1613                                     "clk_ahb clock not found.\n");
1614                 goto err_pltfm_free;
1615         }
1616
1617         clk_xin = devm_clk_get(dev, "clk_xin");
1618         if (IS_ERR(clk_xin)) {
1619                 ret = dev_err_probe(dev, PTR_ERR(clk_xin), "clk_xin clock not found.\n");
1620                 goto err_pltfm_free;
1621         }
1622
1623         ret = clk_prepare_enable(sdhci_arasan->clk_ahb);
1624         if (ret) {
1625                 dev_err(dev, "Unable to enable AHB clock.\n");
1626                 goto err_pltfm_free;
1627         }
1628
1629         /* If clock-frequency property is set, use the provided value */
1630         if (pltfm_host->clock &&
1631             pltfm_host->clock != clk_get_rate(clk_xin)) {
1632                 ret = clk_set_rate(clk_xin, pltfm_host->clock);
1633                 if (ret) {
1634                         dev_err(&pdev->dev, "Failed to set SD clock rate\n");
1635                         goto clk_dis_ahb;
1636                 }
1637         }
1638
1639         ret = clk_prepare_enable(clk_xin);
1640         if (ret) {
1641                 dev_err(dev, "Unable to enable SD clock.\n");
1642                 goto clk_dis_ahb;
1643         }
1644
1645         if (of_property_read_bool(np, "xlnx,fails-without-test-cd"))
1646                 sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_FORCE_CDTEST;
1647
1648         if (of_property_read_bool(np, "xlnx,int-clock-stable-broken"))
1649                 sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE;
1650
1651         pltfm_host->clk = clk_xin;
1652
1653         if (of_device_is_compatible(np, "rockchip,rk3399-sdhci-5.1"))
1654                 sdhci_arasan_update_clockmultiplier(host, 0x0);
1655
1656         if (of_device_is_compatible(np, "intel,keembay-sdhci-5.1-emmc") ||
1657             of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sd") ||
1658             of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sdio") ||
1659             of_device_is_compatible(np, "intel,thunderbay-sdhci-5.1")) {
1660                 sdhci_arasan_update_clockmultiplier(host, 0x0);
1661                 sdhci_arasan_update_support64b(host, 0x0);
1662
1663                 host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
1664         }
1665
1666         sdhci_arasan_update_baseclkfreq(host);
1667
1668         ret = sdhci_arasan_register_sdclk(sdhci_arasan, clk_xin, dev);
1669         if (ret)
1670                 goto clk_disable_all;
1671
1672         if (of_device_is_compatible(np, "xlnx,zynqmp-8.9a")) {
1673                 host->mmc_host_ops.execute_tuning =
1674                         arasan_zynqmp_execute_tuning;
1675
1676                 sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN;
1677                 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
1678         }
1679
1680         arasan_dt_parse_clk_phases(dev, &sdhci_arasan->clk_data);
1681
1682         ret = mmc_of_parse(host->mmc);
1683         if (ret) {
1684                 ret = dev_err_probe(dev, ret, "parsing dt failed.\n");
1685                 goto unreg_clk;
1686         }
1687
1688         sdhci_arasan->phy = ERR_PTR(-ENODEV);
1689         if (of_device_is_compatible(np, "arasan,sdhci-5.1")) {
1690                 sdhci_arasan->phy = devm_phy_get(dev, "phy_arasan");
1691                 if (IS_ERR(sdhci_arasan->phy)) {
1692                         ret = dev_err_probe(dev, PTR_ERR(sdhci_arasan->phy),
1693                                             "No phy for arasan,sdhci-5.1.\n");
1694                         goto unreg_clk;
1695                 }
1696
1697                 ret = phy_init(sdhci_arasan->phy);
1698                 if (ret < 0) {
1699                         dev_err(dev, "phy_init err.\n");
1700                         goto unreg_clk;
1701                 }
1702
1703                 host->mmc_host_ops.hs400_enhanced_strobe =
1704                                         sdhci_arasan_hs400_enhanced_strobe;
1705                 host->mmc_host_ops.start_signal_voltage_switch =
1706                                         sdhci_arasan_voltage_switch;
1707                 sdhci_arasan->has_cqe = true;
1708                 host->mmc->caps2 |= MMC_CAP2_CQE;
1709
1710                 if (!of_property_read_bool(np, "disable-cqe-dcmd"))
1711                         host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
1712         }
1713
1714         ret = sdhci_arasan_add_host(sdhci_arasan);
1715         if (ret)
1716                 goto err_add_host;
1717
1718         return 0;
1719
1720 err_add_host:
1721         if (!IS_ERR(sdhci_arasan->phy))
1722                 phy_exit(sdhci_arasan->phy);
1723 unreg_clk:
1724         sdhci_arasan_unregister_sdclk(dev);
1725 clk_disable_all:
1726         clk_disable_unprepare(clk_xin);
1727 clk_dis_ahb:
1728         clk_disable_unprepare(sdhci_arasan->clk_ahb);
1729 err_pltfm_free:
1730         sdhci_pltfm_free(pdev);
1731         return ret;
1732 }
1733
1734 static int sdhci_arasan_remove(struct platform_device *pdev)
1735 {
1736         struct sdhci_host *host = platform_get_drvdata(pdev);
1737         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1738         struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
1739         struct clk *clk_ahb = sdhci_arasan->clk_ahb;
1740
1741         if (!IS_ERR(sdhci_arasan->phy)) {
1742                 if (sdhci_arasan->is_phy_on)
1743                         phy_power_off(sdhci_arasan->phy);
1744                 phy_exit(sdhci_arasan->phy);
1745         }
1746
1747         sdhci_arasan_unregister_sdclk(&pdev->dev);
1748
1749         sdhci_pltfm_unregister(pdev);
1750
1751         clk_disable_unprepare(clk_ahb);
1752
1753         return 0;
1754 }
1755
1756 static struct platform_driver sdhci_arasan_driver = {
1757         .driver = {
1758                 .name = "sdhci-arasan",
1759                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1760                 .of_match_table = sdhci_arasan_of_match,
1761                 .pm = &sdhci_arasan_dev_pm_ops,
1762         },
1763         .probe = sdhci_arasan_probe,
1764         .remove = sdhci_arasan_remove,
1765 };
1766
1767 module_platform_driver(sdhci_arasan_driver);
1768
1769 MODULE_DESCRIPTION("Driver for the Arasan SDHCI Controller");
1770 MODULE_AUTHOR("Soeren Brinkmann <[email protected]>");
1771 MODULE_LICENSE("GPL");
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