1 // SPDX-License-Identifier: GPL-2.0-only
8  * Date:	2016-8-24
21 #include "sdhci-pltfm.h"
22 #include "sdhci-xenon.h"
41 			dev_err(mmc_dev(host->mmc), "Internal clock never stabilised.\n");  in xenon_enable_internal_clk()
42 			return -ETIMEDOUT;  in xenon_enable_internal_clk()
50 /* Set SDCLK-off-while-idle */
91 	host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;  in xenon_enable_sdhc()
96 	host->mmc->caps &= ~MMC_CAP_BUS_WIDTH_TEST;  in xenon_enable_sdhc()
137 	/* Disable the Re-Tuning Request functionality */  in xenon_retune_setup()
142 	/* Disable the Re-tuning Interrupt */  in xenon_retune_setup()
151 	host->tuning_mode = SDHCI_TUNING_MODE_1;  in xenon_retune_setup()
152 	/* Set re-tuning period */  in xenon_retune_setup()
153 	host->tuning_count = 1 << (priv->tuning_count - 1);  in xenon_retune_setup()
167 	/* Disable tuning request and auto-retuning again */  in xenon_reset_exit()
183 	xenon_reset_exit(host, priv->sdhc_id, mask);  in xenon_reset()
219 	struct mmc_host *mmc = host->mmc;  in xenon_set_power()
220 	u8 pwr = host->pwr;  in xenon_set_power()
224 	if (host->pwr == pwr)  in xenon_set_power()
227 	if (host->pwr == 0)  in xenon_set_power()
230 	if (!IS_ERR(mmc->supply.vmmc))  in xenon_set_power()
231 		mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);  in xenon_set_power()
278 	 * HS400/HS200/eMMC HS doesn't have Preset Value register.  in xenon_set_ios()
281 	 * eMMC HS with preset_enabled set will trigger a bug in  in xenon_set_ios()
284 	if ((ios->timing == MMC_TIMING_MMC_HS400) ||  in xenon_set_ios()
285 	    (ios->timing == MMC_TIMING_MMC_HS200) ||  in xenon_set_ios()
286 	    (ios->timing == MMC_TIMING_MMC_HS)) {  in xenon_set_ios()
287 		host->preset_enabled = false;  in xenon_set_ios()
288 		host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;  in xenon_set_ios()
289 		host->flags &= ~SDHCI_PV_ENABLED;  in xenon_set_ios()
295 		host->quirks2 &= ~SDHCI_QUIRK2_PRESET_VALUE_BROKEN;  in xenon_set_ios()
301 	if (host->clock > XENON_DEFAULT_SDCLK_FREQ)  in xenon_set_ios()
302 		xenon_set_sdclk_off_idle(host, priv->sdhc_id, true);  in xenon_set_ios()
311 	 * Before SD/SDIO set signal voltage, SD bus clock should be  in xenon_start_signal_voltage_switch()
318 	 * since keeping internal clock active obeys SD spec.  in xenon_start_signal_voltage_switch()
322 	xenon_soc_pad_ctrl(host, ios->signal_voltage);  in xenon_start_signal_voltage_switch()
329 	if (PTR_ERR(mmc->supply.vqmmc) == -ENODEV)  in xenon_start_signal_voltage_switch()
337  * priv->init_card_type will be used in PHY timing adjustment.
346 	priv->init_card_type = card->type;  in xenon_init_card()
353 	if (host->timing == MMC_TIMING_UHS_DDR50 ||  in xenon_execute_tuning()
354 		host->timing == MMC_TIMING_MMC_DDR52)  in xenon_execute_tuning()
362 	if (host->tuning_mode != SDHCI_TUNING_MODE_1)  in xenon_execute_tuning()
374 	u8 sdhc_id = priv->sdhc_id;  in xenon_enable_sdio_irq()
396 	host->mmc_host_ops.set_ios = xenon_set_ios;  in xenon_replace_mmc_host_ops()
397 	host->mmc_host_ops.start_signal_voltage_switch =  in xenon_replace_mmc_host_ops()
399 	host->mmc_host_ops.init_card = xenon_init_card;  in xenon_replace_mmc_host_ops()
400 	host->mmc_host_ops.execute_tuning = xenon_execute_tuning;  in xenon_replace_mmc_host_ops()
401 	host->mmc_host_ops.enable_sdio_irq = xenon_enable_sdio_irq;  in xenon_replace_mmc_host_ops()
406  * sdhc-id: the index of current SDHC.
408  * tun-count: the interval between re-tuning
412 	struct device_node *np = pdev->dev.of_node;  in xenon_probe_dt()
414 	struct mmc_host *mmc = host->mmc;  in xenon_probe_dt()
421 	if (of_device_is_compatible(np, "marvell,armada-ap806-sdhci"))  in xenon_probe_dt()
422 		host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;  in xenon_probe_dt()
425 	if (!of_property_read_u32(np, "marvell,xenon-sdhc-id", &sdhc_id)) {  in xenon_probe_dt()
431 			return -EINVAL;  in xenon_probe_dt()
434 	priv->sdhc_id = sdhc_id;  in xenon_probe_dt()
437 	if (!of_property_read_u32(np, "marvell,xenon-tun-count",  in xenon_probe_dt()
440 			dev_err(mmc_dev(mmc), "Wrong Re-tuning Count. Set default value %d\n",  in xenon_probe_dt()
445 	priv->tuning_count = tuning_count;  in xenon_probe_dt()
454 	u8 sdhc_id = priv->sdhc_id;  in xenon_sdhc_prepare()
465 	/* Disable SDCLK-Off-While-Idle before card init */  in xenon_sdhc_prepare()
477 	u8 sdhc_id = priv->sdhc_id;  in xenon_sdhc_unprepare()
504 	pltfm_host->clk = devm_clk_get(&pdev->dev, "core");  in xenon_probe()
505 	if (IS_ERR(pltfm_host->clk)) {  in xenon_probe()
506 		err = PTR_ERR(pltfm_host->clk);  in xenon_probe()
507 		dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err);  in xenon_probe()
510 	err = clk_prepare_enable(pltfm_host->clk);  in xenon_probe()
514 	priv->axi_clk = devm_clk_get(&pdev->dev, "axi");  in xenon_probe()
515 	if (IS_ERR(priv->axi_clk)) {  in xenon_probe()
516 		err = PTR_ERR(priv->axi_clk);  in xenon_probe()
517 		if (err == -EPROBE_DEFER)  in xenon_probe()
520 		err = clk_prepare_enable(priv->axi_clk);  in xenon_probe()
525 	err = mmc_of_parse(host->mmc);  in xenon_probe()
542 	pm_runtime_get_noresume(&pdev->dev);  in xenon_probe()
543 	pm_runtime_set_active(&pdev->dev);  in xenon_probe()
544 	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);  in xenon_probe()
545 	pm_runtime_use_autosuspend(&pdev->dev);  in xenon_probe()
546 	pm_runtime_enable(&pdev->dev);  in xenon_probe()
547 	pm_suspend_ignore_children(&pdev->dev, 1);  in xenon_probe()
553 	pm_runtime_put_autosuspend(&pdev->dev);  in xenon_probe()
558 	pm_runtime_disable(&pdev->dev);  in xenon_probe()
559 	pm_runtime_put_noidle(&pdev->dev);  in xenon_probe()
562 	clk_disable_unprepare(priv->axi_clk);  in xenon_probe()
564 	clk_disable_unprepare(pltfm_host->clk);  in xenon_probe()
576 	pm_runtime_get_sync(&pdev->dev);  in xenon_remove()
577 	pm_runtime_disable(&pdev->dev);  in xenon_remove()
578 	pm_runtime_put_noidle(&pdev->dev);  in xenon_remove()
583 	clk_disable_unprepare(priv->axi_clk);  in xenon_remove()
584 	clk_disable_unprepare(pltfm_host->clk);  in xenon_remove()
601 	priv->restore_needed = true;  in xenon_suspend()
618 	if (host->tuning_mode != SDHCI_TUNING_MODE_3)  in xenon_runtime_suspend()
619 		mmc_retune_needed(host->mmc);  in xenon_runtime_suspend()
621 	clk_disable_unprepare(pltfm_host->clk);  in xenon_runtime_suspend()
623 	 * Need to update the priv->clock here, or when runtime resume  in xenon_runtime_suspend()
627 	priv->clock = 0;  in xenon_runtime_suspend()
638 	ret = clk_prepare_enable(pltfm_host->clk);  in xenon_runtime_resume()
644 	if (priv->restore_needed) {  in xenon_runtime_resume()
648 		priv->restore_needed = false;  in xenon_runtime_resume()
656 	clk_disable_unprepare(pltfm_host->clk);  in xenon_runtime_resume()
670 	{ .compatible = "marvell,armada-ap806-sdhci",},
671 	{ .compatible = "marvell,armada-cp110-sdhci",},
672 	{ .compatible = "marvell,armada-3700-sdhci",},
679 		.name	= "xenon-sdhci",