1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for Marvell Xenon SDHC as a platform device
4 *
5 * Copyright (C) 2016 Marvell, All Rights Reserved.
6 *
7 * Author: Hu Ziji <huziji@marvell.com>
8 * Date: 2016-8-24
9 *
10 * Inspired by Jisheng Zhang <jszhang@marvell.com>
11 * Special thanks to Video BG4 project team.
12 */
13
14 #include <linux/acpi.h>
15 #include <linux/delay.h>
16 #include <linux/ktime.h>
17 #include <linux/module.h>
18 #include <linux/of.h>
19 #include <linux/pm.h>
20 #include <linux/pm_runtime.h>
21
22 #include "sdhci-pltfm.h"
23 #include "sdhci-xenon.h"
24
xenon_enable_internal_clk(struct sdhci_host * host)25 static int xenon_enable_internal_clk(struct sdhci_host *host)
26 {
27 u32 reg;
28 ktime_t timeout;
29
30 reg = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
31 reg |= SDHCI_CLOCK_INT_EN;
32 sdhci_writel(host, reg, SDHCI_CLOCK_CONTROL);
33 /* Wait max 20 ms */
34 timeout = ktime_add_ms(ktime_get(), 20);
35 while (1) {
36 bool timedout = ktime_after(ktime_get(), timeout);
37
38 reg = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
39 if (reg & SDHCI_CLOCK_INT_STABLE)
40 break;
41 if (timedout) {
42 dev_err(mmc_dev(host->mmc), "Internal clock never stabilised.\n");
43 return -ETIMEDOUT;
44 }
45 usleep_range(900, 1100);
46 }
47
48 return 0;
49 }
50
51 /* Set SDCLK-off-while-idle */
xenon_set_sdclk_off_idle(struct sdhci_host * host,unsigned char sdhc_id,bool enable)52 static void xenon_set_sdclk_off_idle(struct sdhci_host *host,
53 unsigned char sdhc_id, bool enable)
54 {
55 u32 reg;
56 u32 mask;
57
58 reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
59 /* Get the bit shift basing on the SDHC index */
60 mask = (0x1 << (XENON_SDCLK_IDLEOFF_ENABLE_SHIFT + sdhc_id));
61 if (enable)
62 reg |= mask;
63 else
64 reg &= ~mask;
65
66 sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
67 }
68
69 /* Enable/Disable the Auto Clock Gating function */
xenon_set_acg(struct sdhci_host * host,bool enable)70 static void xenon_set_acg(struct sdhci_host *host, bool enable)
71 {
72 u32 reg;
73
74 reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
75 if (enable)
76 reg &= ~XENON_AUTO_CLKGATE_DISABLE_MASK;
77 else
78 reg |= XENON_AUTO_CLKGATE_DISABLE_MASK;
79 sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
80 }
81
82 /* Enable this SDHC */
xenon_enable_sdhc(struct sdhci_host * host,unsigned char sdhc_id)83 static void xenon_enable_sdhc(struct sdhci_host *host,
84 unsigned char sdhc_id)
85 {
86 u32 reg;
87
88 reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
89 reg |= (BIT(sdhc_id) << XENON_SLOT_ENABLE_SHIFT);
90 sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
91
92 host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
93 /*
94 * Force to clear BUS_TEST to
95 * skip bus_test_pre and bus_test_post
96 */
97 host->mmc->caps &= ~MMC_CAP_BUS_WIDTH_TEST;
98 }
99
100 /* Disable this SDHC */
xenon_disable_sdhc(struct sdhci_host * host,unsigned char sdhc_id)101 static void xenon_disable_sdhc(struct sdhci_host *host,
102 unsigned char sdhc_id)
103 {
104 u32 reg;
105
106 reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
107 reg &= ~(BIT(sdhc_id) << XENON_SLOT_ENABLE_SHIFT);
108 sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
109 }
110
111 /* Enable Parallel Transfer Mode */
xenon_enable_sdhc_parallel_tran(struct sdhci_host * host,unsigned char sdhc_id)112 static void xenon_enable_sdhc_parallel_tran(struct sdhci_host *host,
113 unsigned char sdhc_id)
114 {
115 u32 reg;
116
117 reg = sdhci_readl(host, XENON_SYS_EXT_OP_CTRL);
118 reg |= BIT(sdhc_id);
119 sdhci_writel(host, reg, XENON_SYS_EXT_OP_CTRL);
120 }
121
122 /* Mask command conflict error */
xenon_mask_cmd_conflict_err(struct sdhci_host * host)123 static void xenon_mask_cmd_conflict_err(struct sdhci_host *host)
124 {
125 u32 reg;
126
127 reg = sdhci_readl(host, XENON_SYS_EXT_OP_CTRL);
128 reg |= XENON_MASK_CMD_CONFLICT_ERR;
129 sdhci_writel(host, reg, XENON_SYS_EXT_OP_CTRL);
130 }
131
xenon_retune_setup(struct sdhci_host * host)132 static void xenon_retune_setup(struct sdhci_host *host)
133 {
134 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
135 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
136 u32 reg;
137
138 /* Disable the Re-Tuning Request functionality */
139 reg = sdhci_readl(host, XENON_SLOT_RETUNING_REQ_CTRL);
140 reg &= ~XENON_RETUNING_COMPATIBLE;
141 sdhci_writel(host, reg, XENON_SLOT_RETUNING_REQ_CTRL);
142
143 /* Disable the Re-tuning Interrupt */
144 reg = sdhci_readl(host, SDHCI_SIGNAL_ENABLE);
145 reg &= ~SDHCI_INT_RETUNE;
146 sdhci_writel(host, reg, SDHCI_SIGNAL_ENABLE);
147 reg = sdhci_readl(host, SDHCI_INT_ENABLE);
148 reg &= ~SDHCI_INT_RETUNE;
149 sdhci_writel(host, reg, SDHCI_INT_ENABLE);
150
151 /* Force to use Tuning Mode 1 */
152 host->tuning_mode = SDHCI_TUNING_MODE_1;
153 /* Set re-tuning period */
154 host->tuning_count = 1 << (priv->tuning_count - 1);
155 }
156
157 /*
158 * Operations inside struct sdhci_ops
159 */
160 /* Recover the Register Setting cleared during SOFTWARE_RESET_ALL */
xenon_reset_exit(struct sdhci_host * host,unsigned char sdhc_id,u8 mask)161 static void xenon_reset_exit(struct sdhci_host *host,
162 unsigned char sdhc_id, u8 mask)
163 {
164 /* Only SOFTWARE RESET ALL will clear the register setting */
165 if (!(mask & SDHCI_RESET_ALL))
166 return;
167
168 /* Disable tuning request and auto-retuning again */
169 xenon_retune_setup(host);
170
171 /*
172 * The ACG should be turned off at the early init time, in order
173 * to solve a possible issues with the 1.8V regulator stabilization.
174 * The feature is enabled in later stage.
175 */
176 xenon_set_acg(host, false);
177
178 xenon_set_sdclk_off_idle(host, sdhc_id, false);
179
180 xenon_mask_cmd_conflict_err(host);
181 }
182
xenon_reset(struct sdhci_host * host,u8 mask)183 static void xenon_reset(struct sdhci_host *host, u8 mask)
184 {
185 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
186 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
187
188 sdhci_reset(host, mask);
189 xenon_reset_exit(host, priv->sdhc_id, mask);
190 }
191
192 /*
193 * Xenon defines different values for HS200 and HS400
194 * in Host_Control_2
195 */
xenon_set_uhs_signaling(struct sdhci_host * host,unsigned int timing)196 static void xenon_set_uhs_signaling(struct sdhci_host *host,
197 unsigned int timing)
198 {
199 u16 ctrl_2;
200
201 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
202 /* Select Bus Speed Mode for host */
203 ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
204 if (timing == MMC_TIMING_MMC_HS200)
205 ctrl_2 |= XENON_CTRL_HS200;
206 else if (timing == MMC_TIMING_UHS_SDR104)
207 ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
208 else if (timing == MMC_TIMING_UHS_SDR12)
209 ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
210 else if (timing == MMC_TIMING_UHS_SDR25)
211 ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
212 else if (timing == MMC_TIMING_UHS_SDR50)
213 ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
214 else if ((timing == MMC_TIMING_UHS_DDR50) ||
215 (timing == MMC_TIMING_MMC_DDR52))
216 ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
217 else if (timing == MMC_TIMING_MMC_HS400)
218 ctrl_2 |= XENON_CTRL_HS400;
219 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
220 }
221
xenon_set_power(struct sdhci_host * host,unsigned char mode,unsigned short vdd)222 static void xenon_set_power(struct sdhci_host *host, unsigned char mode,
223 unsigned short vdd)
224 {
225 struct mmc_host *mmc = host->mmc;
226 u8 pwr = host->pwr;
227
228 sdhci_set_power_noreg(host, mode, vdd);
229
230 if (host->pwr == pwr)
231 return;
232
233 if (host->pwr == 0)
234 vdd = 0;
235
236 if (!IS_ERR(mmc->supply.vmmc))
237 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
238 }
239
xenon_voltage_switch(struct sdhci_host * host)240 static void xenon_voltage_switch(struct sdhci_host *host)
241 {
242 /* Wait for 5ms after set 1.8V signal enable bit */
243 usleep_range(5000, 5500);
244 }
245
xenon_get_max_clock(struct sdhci_host * host)246 static unsigned int xenon_get_max_clock(struct sdhci_host *host)
247 {
248 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
249
250 if (pltfm_host->clk)
251 return sdhci_pltfm_clk_get_max_clock(host);
252 else
253 return pltfm_host->clock;
254 }
255
256 static const struct sdhci_ops sdhci_xenon_ops = {
257 .voltage_switch = xenon_voltage_switch,
258 .set_clock = sdhci_set_clock,
259 .set_power = xenon_set_power,
260 .set_bus_width = sdhci_set_bus_width,
261 .reset = xenon_reset,
262 .set_uhs_signaling = xenon_set_uhs_signaling,
263 .get_max_clock = xenon_get_max_clock,
264 };
265
266 static const struct sdhci_pltfm_data sdhci_xenon_pdata = {
267 .ops = &sdhci_xenon_ops,
268 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
269 SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
270 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
271 };
272
273 /*
274 * Xenon Specific Operations in mmc_host_ops
275 */
xenon_set_ios(struct mmc_host * mmc,struct mmc_ios * ios)276 static void xenon_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
277 {
278 struct sdhci_host *host = mmc_priv(mmc);
279 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
280 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
281 u32 reg;
282
283 /*
284 * HS400/HS200/eMMC HS doesn't have Preset Value register.
285 * However, sdhci_set_ios will read HS400/HS200 Preset register.
286 * Disable Preset Value register for HS400/HS200.
287 * eMMC HS with preset_enabled set will trigger a bug in
288 * get_preset_value().
289 */
290 if ((ios->timing == MMC_TIMING_MMC_HS400) ||
291 (ios->timing == MMC_TIMING_MMC_HS200) ||
292 (ios->timing == MMC_TIMING_MMC_HS)) {
293 host->preset_enabled = false;
294 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
295 host->flags &= ~SDHCI_PV_ENABLED;
296
297 reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
298 reg &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
299 sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
300 } else {
301 host->quirks2 &= ~SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
302 }
303
304 sdhci_set_ios(mmc, ios);
305 xenon_phy_adj(host, ios);
306
307 if (host->clock > XENON_DEFAULT_SDCLK_FREQ)
308 xenon_set_sdclk_off_idle(host, priv->sdhc_id, true);
309 }
310
xenon_start_signal_voltage_switch(struct mmc_host * mmc,struct mmc_ios * ios)311 static int xenon_start_signal_voltage_switch(struct mmc_host *mmc,
312 struct mmc_ios *ios)
313 {
314 struct sdhci_host *host = mmc_priv(mmc);
315
316 /*
317 * Before SD/SDIO set signal voltage, SD bus clock should be
318 * disabled. However, sdhci_set_clock will also disable the Internal
319 * clock in mmc_set_signal_voltage().
320 * If Internal clock is disabled, the 3.3V/1.8V bit can not be updated.
321 * Thus here manually enable internal clock.
322 *
323 * After switch completes, it is unnecessary to disable internal clock,
324 * since keeping internal clock active obeys SD spec.
325 */
326 xenon_enable_internal_clk(host);
327
328 xenon_soc_pad_ctrl(host, ios->signal_voltage);
329
330 /*
331 * If Vqmmc is fixed on platform, vqmmc regulator should be unavailable.
332 * Thus SDHCI_CTRL_VDD_180 bit might not work then.
333 * Skip the standard voltage switch to avoid any issue.
334 */
335 if (PTR_ERR(mmc->supply.vqmmc) == -ENODEV)
336 return 0;
337
338 return sdhci_start_signal_voltage_switch(mmc, ios);
339 }
340
341 /*
342 * Update card type.
343 * priv->init_card_type will be used in PHY timing adjustment.
344 */
xenon_init_card(struct mmc_host * mmc,struct mmc_card * card)345 static void xenon_init_card(struct mmc_host *mmc, struct mmc_card *card)
346 {
347 struct sdhci_host *host = mmc_priv(mmc);
348 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
349 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
350
351 /* Update card type*/
352 priv->init_card_type = card->type;
353 }
354
xenon_execute_tuning(struct mmc_host * mmc,u32 opcode)355 static int xenon_execute_tuning(struct mmc_host *mmc, u32 opcode)
356 {
357 struct sdhci_host *host = mmc_priv(mmc);
358
359 if (host->timing == MMC_TIMING_UHS_DDR50 ||
360 host->timing == MMC_TIMING_MMC_DDR52)
361 return 0;
362
363 /*
364 * Currently force Xenon driver back to support mode 1 only,
365 * even though Xenon might claim to support mode 2 or mode 3.
366 * It requires more time to test mode 2/mode 3 on more platforms.
367 */
368 if (host->tuning_mode != SDHCI_TUNING_MODE_1)
369 xenon_retune_setup(host);
370
371 return sdhci_execute_tuning(mmc, opcode);
372 }
373
xenon_enable_sdio_irq(struct mmc_host * mmc,int enable)374 static void xenon_enable_sdio_irq(struct mmc_host *mmc, int enable)
375 {
376 struct sdhci_host *host = mmc_priv(mmc);
377 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
378 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
379 u32 reg;
380 u8 sdhc_id = priv->sdhc_id;
381
382 sdhci_enable_sdio_irq(mmc, enable);
383
384 if (enable) {
385 /*
386 * Set SDIO Card Inserted indication
387 * to enable detecting SDIO async irq.
388 */
389 reg = sdhci_readl(host, XENON_SYS_CFG_INFO);
390 reg |= (1 << (sdhc_id + XENON_SLOT_TYPE_SDIO_SHIFT));
391 sdhci_writel(host, reg, XENON_SYS_CFG_INFO);
392 } else {
393 /* Clear SDIO Card Inserted indication */
394 reg = sdhci_readl(host, XENON_SYS_CFG_INFO);
395 reg &= ~(1 << (sdhc_id + XENON_SLOT_TYPE_SDIO_SHIFT));
396 sdhci_writel(host, reg, XENON_SYS_CFG_INFO);
397 }
398 }
399
xenon_replace_mmc_host_ops(struct sdhci_host * host)400 static void xenon_replace_mmc_host_ops(struct sdhci_host *host)
401 {
402 host->mmc_host_ops.set_ios = xenon_set_ios;
403 host->mmc_host_ops.start_signal_voltage_switch =
404 xenon_start_signal_voltage_switch;
405 host->mmc_host_ops.init_card = xenon_init_card;
406 host->mmc_host_ops.execute_tuning = xenon_execute_tuning;
407 host->mmc_host_ops.enable_sdio_irq = xenon_enable_sdio_irq;
408 }
409
410 /*
411 * Parse Xenon specific DT properties:
412 * sdhc-id: the index of current SDHC.
413 * Refer to XENON_SYS_CFG_INFO register
414 * tun-count: the interval between re-tuning
415 */
xenon_probe_params(struct platform_device * pdev)416 static int xenon_probe_params(struct platform_device *pdev)
417 {
418 struct device *dev = &pdev->dev;
419 struct sdhci_host *host = platform_get_drvdata(pdev);
420 struct mmc_host *mmc = host->mmc;
421 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
422 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
423 u32 sdhc_id, nr_sdhc;
424 u32 tuning_count;
425
426 /* Disable HS200 on Armada AP806 */
427 if (priv->hw_version == XENON_AP806)
428 host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
429
430 sdhc_id = 0x0;
431 if (!device_property_read_u32(dev, "marvell,xenon-sdhc-id", &sdhc_id)) {
432 nr_sdhc = sdhci_readl(host, XENON_SYS_CFG_INFO);
433 nr_sdhc &= XENON_NR_SUPPORTED_SLOT_MASK;
434 if (unlikely(sdhc_id > nr_sdhc)) {
435 dev_err(mmc_dev(mmc), "SDHC Index %d exceeds Number of SDHCs %d\n",
436 sdhc_id, nr_sdhc);
437 return -EINVAL;
438 }
439 }
440 priv->sdhc_id = sdhc_id;
441
442 tuning_count = XENON_DEF_TUNING_COUNT;
443 if (!device_property_read_u32(dev, "marvell,xenon-tun-count",
444 &tuning_count)) {
445 if (unlikely(tuning_count >= XENON_TMR_RETUN_NO_PRESENT)) {
446 dev_err(mmc_dev(mmc), "Wrong Re-tuning Count. Set default value %d\n",
447 XENON_DEF_TUNING_COUNT);
448 tuning_count = XENON_DEF_TUNING_COUNT;
449 }
450 }
451 priv->tuning_count = tuning_count;
452
453 return xenon_phy_parse_params(dev, host);
454 }
455
xenon_sdhc_prepare(struct sdhci_host * host)456 static int xenon_sdhc_prepare(struct sdhci_host *host)
457 {
458 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
459 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
460 u8 sdhc_id = priv->sdhc_id;
461
462 /* Enable SDHC */
463 xenon_enable_sdhc(host, sdhc_id);
464
465 /* Enable ACG */
466 xenon_set_acg(host, true);
467
468 /* Enable Parallel Transfer Mode */
469 xenon_enable_sdhc_parallel_tran(host, sdhc_id);
470
471 /* Disable SDCLK-Off-While-Idle before card init */
472 xenon_set_sdclk_off_idle(host, sdhc_id, false);
473
474 xenon_mask_cmd_conflict_err(host);
475
476 return 0;
477 }
478
xenon_sdhc_unprepare(struct sdhci_host * host)479 static void xenon_sdhc_unprepare(struct sdhci_host *host)
480 {
481 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
482 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
483 u8 sdhc_id = priv->sdhc_id;
484
485 /* disable SDHC */
486 xenon_disable_sdhc(host, sdhc_id);
487 }
488
xenon_probe(struct platform_device * pdev)489 static int xenon_probe(struct platform_device *pdev)
490 {
491 struct sdhci_pltfm_host *pltfm_host;
492 struct device *dev = &pdev->dev;
493 struct sdhci_host *host;
494 struct xenon_priv *priv;
495 int err;
496
497 host = sdhci_pltfm_init(pdev, &sdhci_xenon_pdata,
498 sizeof(struct xenon_priv));
499 if (IS_ERR(host))
500 return PTR_ERR(host);
501
502 pltfm_host = sdhci_priv(host);
503 priv = sdhci_pltfm_priv(pltfm_host);
504
505 priv->hw_version = (unsigned long)device_get_match_data(&pdev->dev);
506
507 /*
508 * Link Xenon specific mmc_host_ops function,
509 * to replace standard ones in sdhci_ops.
510 */
511 xenon_replace_mmc_host_ops(host);
512
513 if (dev->of_node) {
514 pltfm_host->clk = devm_clk_get(&pdev->dev, "core");
515 if (IS_ERR(pltfm_host->clk)) {
516 err = PTR_ERR(pltfm_host->clk);
517 dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err);
518 goto free_pltfm;
519 }
520 err = clk_prepare_enable(pltfm_host->clk);
521 if (err)
522 goto free_pltfm;
523
524 priv->axi_clk = devm_clk_get(&pdev->dev, "axi");
525 if (IS_ERR(priv->axi_clk)) {
526 err = PTR_ERR(priv->axi_clk);
527 if (err == -EPROBE_DEFER)
528 goto err_clk;
529 } else {
530 err = clk_prepare_enable(priv->axi_clk);
531 if (err)
532 goto err_clk;
533 }
534 }
535
536 err = mmc_of_parse(host->mmc);
537 if (err)
538 goto err_clk_axi;
539
540 sdhci_get_property(pdev);
541
542 xenon_set_acg(host, false);
543
544 /* Xenon specific parameters parse */
545 err = xenon_probe_params(pdev);
546 if (err)
547 goto err_clk_axi;
548
549 err = xenon_sdhc_prepare(host);
550 if (err)
551 goto err_clk_axi;
552
553 pm_runtime_get_noresume(&pdev->dev);
554 pm_runtime_set_active(&pdev->dev);
555 pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
556 pm_runtime_use_autosuspend(&pdev->dev);
557 pm_runtime_enable(&pdev->dev);
558 pm_suspend_ignore_children(&pdev->dev, 1);
559
560 err = sdhci_add_host(host);
561 if (err)
562 goto remove_sdhc;
563
564 pm_runtime_put_autosuspend(&pdev->dev);
565
566 return 0;
567
568 remove_sdhc:
569 pm_runtime_disable(&pdev->dev);
570 pm_runtime_put_noidle(&pdev->dev);
571 xenon_sdhc_unprepare(host);
572 err_clk_axi:
573 clk_disable_unprepare(priv->axi_clk);
574 err_clk:
575 clk_disable_unprepare(pltfm_host->clk);
576 free_pltfm:
577 sdhci_pltfm_free(pdev);
578 return err;
579 }
580
xenon_remove(struct platform_device * pdev)581 static void xenon_remove(struct platform_device *pdev)
582 {
583 struct sdhci_host *host = platform_get_drvdata(pdev);
584 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
585 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
586
587 pm_runtime_get_sync(&pdev->dev);
588 pm_runtime_disable(&pdev->dev);
589 pm_runtime_put_noidle(&pdev->dev);
590
591 sdhci_remove_host(host, 0);
592
593 xenon_sdhc_unprepare(host);
594 clk_disable_unprepare(priv->axi_clk);
595 clk_disable_unprepare(pltfm_host->clk);
596
597 sdhci_pltfm_free(pdev);
598 }
599
600 #ifdef CONFIG_PM_SLEEP
xenon_suspend(struct device * dev)601 static int xenon_suspend(struct device *dev)
602 {
603 struct sdhci_host *host = dev_get_drvdata(dev);
604 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
605 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
606 int ret;
607
608 ret = pm_runtime_force_suspend(dev);
609
610 priv->restore_needed = true;
611 return ret;
612 }
613 #endif
614
615 #ifdef CONFIG_PM
xenon_runtime_suspend(struct device * dev)616 static int xenon_runtime_suspend(struct device *dev)
617 {
618 struct sdhci_host *host = dev_get_drvdata(dev);
619 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
620 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
621 int ret;
622
623 ret = sdhci_runtime_suspend_host(host);
624 if (ret)
625 return ret;
626
627 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
628 mmc_retune_needed(host->mmc);
629
630 clk_disable_unprepare(pltfm_host->clk);
631 /*
632 * Need to update the priv->clock here, or when runtime resume
633 * back, phy don't aware the clock change and won't adjust phy
634 * which will cause cmd err
635 */
636 priv->clock = 0;
637 return 0;
638 }
639
xenon_runtime_resume(struct device * dev)640 static int xenon_runtime_resume(struct device *dev)
641 {
642 struct sdhci_host *host = dev_get_drvdata(dev);
643 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
644 struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
645 int ret;
646
647 ret = clk_prepare_enable(pltfm_host->clk);
648 if (ret) {
649 dev_err(dev, "can't enable mainck\n");
650 return ret;
651 }
652
653 if (priv->restore_needed) {
654 ret = xenon_sdhc_prepare(host);
655 if (ret)
656 goto out;
657 priv->restore_needed = false;
658 }
659
660 ret = sdhci_runtime_resume_host(host, 0);
661 if (ret)
662 goto out;
663 return 0;
664 out:
665 clk_disable_unprepare(pltfm_host->clk);
666 return ret;
667 }
668 #endif /* CONFIG_PM */
669
670 static const struct dev_pm_ops sdhci_xenon_dev_pm_ops = {
671 SET_SYSTEM_SLEEP_PM_OPS(xenon_suspend,
672 pm_runtime_force_resume)
673 SET_RUNTIME_PM_OPS(xenon_runtime_suspend,
674 xenon_runtime_resume,
675 NULL)
676 };
677
678 static const struct of_device_id sdhci_xenon_dt_ids[] = {
679 { .compatible = "marvell,armada-ap806-sdhci", .data = (void *)XENON_AP806},
680 { .compatible = "marvell,armada-ap807-sdhci", .data = (void *)XENON_AP807},
681 { .compatible = "marvell,armada-cp110-sdhci", .data = (void *)XENON_CP110},
682 { .compatible = "marvell,armada-3700-sdhci", .data = (void *)XENON_A3700},
683 {}
684 };
685 MODULE_DEVICE_TABLE(of, sdhci_xenon_dt_ids);
686
687 #ifdef CONFIG_ACPI
688 static const struct acpi_device_id sdhci_xenon_acpi_ids[] = {
689 { .id = "MRVL0002", XENON_AP806},
690 { .id = "MRVL0003", XENON_AP807},
691 { .id = "MRVL0004", XENON_CP110},
692 {}
693 };
694 MODULE_DEVICE_TABLE(acpi, sdhci_xenon_acpi_ids);
695 #endif
696
697 static struct platform_driver sdhci_xenon_driver = {
698 .driver = {
699 .name = "xenon-sdhci",
700 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
701 .of_match_table = sdhci_xenon_dt_ids,
702 .acpi_match_table = ACPI_PTR(sdhci_xenon_acpi_ids),
703 .pm = &sdhci_xenon_dev_pm_ops,
704 },
705 .probe = xenon_probe,
706 .remove_new = xenon_remove,
707 };
708
709 module_platform_driver(sdhci_xenon_driver);
710
711 MODULE_DESCRIPTION("SDHCI platform driver for Marvell Xenon SDHC");
712 MODULE_AUTHOR("Hu Ziji <huziji@marvell.com>");
713 MODULE_LICENSE("GPL v2");
714