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()
93 	 * Force to clear BUS_TEST to  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()
150 	/* Force to use Tuning Mode 1 */  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()
188 	xenon_reset_exit(host, priv->sdhc_id, mask);  in xenon_reset()
224 	struct mmc_host *mmc = host->mmc;  in xenon_set_power()
225 	u8 pwr = host->pwr;  in xenon_set_power()
229 	if (host->pwr == pwr)  in xenon_set_power()
232 	if (host->pwr == 0)  in xenon_set_power()
235 	if (!IS_ERR(mmc->supply.vmmc))  in xenon_set_power()
236 		mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);  in xenon_set_power()
289 	if ((ios->timing == MMC_TIMING_MMC_HS400) ||  in xenon_set_ios()
290 	    (ios->timing == MMC_TIMING_MMC_HS200) ||  in xenon_set_ios()
291 	    (ios->timing == MMC_TIMING_MMC_HS)) {  in xenon_set_ios()
292 		host->preset_enabled = false;  in xenon_set_ios()
293 		host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;  in xenon_set_ios()
294 		host->flags &= ~SDHCI_PV_ENABLED;  in xenon_set_ios()
300 		host->quirks2 &= ~SDHCI_QUIRK2_PRESET_VALUE_BROKEN;  in xenon_set_ios()
306 	if (host->clock > XENON_DEFAULT_SDCLK_FREQ)  in xenon_set_ios()
307 		xenon_set_sdclk_off_idle(host, priv->sdhc_id, true);  in xenon_set_ios()
317 	 * disabled. However, sdhci_set_clock will also disable the Internal  in xenon_start_signal_voltage_switch()
319 	 * If Internal clock is disabled, the 3.3V/1.8V bit can not be updated.  in xenon_start_signal_voltage_switch()
320 	 * Thus here manually enable internal clock.  in xenon_start_signal_voltage_switch()
322 	 * After switch completes, it is unnecessary to disable internal clock,  in xenon_start_signal_voltage_switch()
323 	 * since keeping internal clock active obeys SD spec.  in xenon_start_signal_voltage_switch()
327 	xenon_soc_pad_ctrl(host, ios->signal_voltage);  in xenon_start_signal_voltage_switch()
334 	if (PTR_ERR(mmc->supply.vqmmc) == -ENODEV)  in xenon_start_signal_voltage_switch()
342  * priv->init_card_type will be used in PHY timing adjustment.
351 	priv->init_card_type = card->type;  in xenon_init_card()
358 	if (host->timing == MMC_TIMING_UHS_DDR50 ||  in xenon_execute_tuning()
359 		host->timing == MMC_TIMING_MMC_DDR52)  in xenon_execute_tuning()
363 	 * Currently force Xenon driver back to support mode 1 only,  in xenon_execute_tuning()
367 	if (host->tuning_mode != SDHCI_TUNING_MODE_1)  in xenon_execute_tuning()
379 	u8 sdhc_id = priv->sdhc_id;  in xenon_enable_sdio_irq()
401 	host->mmc_host_ops.set_ios = xenon_set_ios;  in xenon_replace_mmc_host_ops()
402 	host->mmc_host_ops.start_signal_voltage_switch =  in xenon_replace_mmc_host_ops()
404 	host->mmc_host_ops.init_card = xenon_init_card;  in xenon_replace_mmc_host_ops()
405 	host->mmc_host_ops.execute_tuning = xenon_execute_tuning;  in xenon_replace_mmc_host_ops()
406 	host->mmc_host_ops.enable_sdio_irq = xenon_enable_sdio_irq;  in xenon_replace_mmc_host_ops()
411  * sdhc-id: the index of current SDHC.
413  * tun-count: the interval between re-tuning
417 	struct device_node *np = pdev->dev.of_node;  in xenon_probe_dt()
419 	struct mmc_host *mmc = host->mmc;  in xenon_probe_dt()
426 	if (of_device_is_compatible(np, "marvell,armada-ap806-sdhci"))  in xenon_probe_dt()
427 		host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;  in xenon_probe_dt()
430 	if (!of_property_read_u32(np, "marvell,xenon-sdhc-id", &sdhc_id)) {  in xenon_probe_dt()
436 			return -EINVAL;  in xenon_probe_dt()
439 	priv->sdhc_id = sdhc_id;  in xenon_probe_dt()
442 	if (!of_property_read_u32(np, "marvell,xenon-tun-count",  in xenon_probe_dt()
445 			dev_err(mmc_dev(mmc), "Wrong Re-tuning Count. Set default value %d\n",  in xenon_probe_dt()
450 	priv->tuning_count = tuning_count;  in xenon_probe_dt()
459 	u8 sdhc_id = priv->sdhc_id;  in xenon_sdhc_prepare()
470 	/* Disable SDCLK-Off-While-Idle before card init */  in xenon_sdhc_prepare()
482 	u8 sdhc_id = priv->sdhc_id;  in xenon_sdhc_unprepare()
509 	pltfm_host->clk = devm_clk_get(&pdev->dev, "core");  in xenon_probe()
510 	if (IS_ERR(pltfm_host->clk)) {  in xenon_probe()
511 		err = PTR_ERR(pltfm_host->clk);  in xenon_probe()
512 		dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err);  in xenon_probe()
515 	err = clk_prepare_enable(pltfm_host->clk);  in xenon_probe()
519 	priv->axi_clk = devm_clk_get(&pdev->dev, "axi");  in xenon_probe()
520 	if (IS_ERR(priv->axi_clk)) {  in xenon_probe()
521 		err = PTR_ERR(priv->axi_clk);  in xenon_probe()
522 		if (err == -EPROBE_DEFER)  in xenon_probe()
525 		err = clk_prepare_enable(priv->axi_clk);  in xenon_probe()
530 	err = mmc_of_parse(host->mmc);  in xenon_probe()
547 	pm_runtime_get_noresume(&pdev->dev);  in xenon_probe()
548 	pm_runtime_set_active(&pdev->dev);  in xenon_probe()
549 	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);  in xenon_probe()
550 	pm_runtime_use_autosuspend(&pdev->dev);  in xenon_probe()
551 	pm_runtime_enable(&pdev->dev);  in xenon_probe()
552 	pm_suspend_ignore_children(&pdev->dev, 1);  in xenon_probe()
558 	pm_runtime_put_autosuspend(&pdev->dev);  in xenon_probe()
563 	pm_runtime_disable(&pdev->dev);  in xenon_probe()
564 	pm_runtime_put_noidle(&pdev->dev);  in xenon_probe()
567 	clk_disable_unprepare(priv->axi_clk);  in xenon_probe()
569 	clk_disable_unprepare(pltfm_host->clk);  in xenon_probe()
581 	pm_runtime_get_sync(&pdev->dev);  in xenon_remove()
582 	pm_runtime_disable(&pdev->dev);  in xenon_remove()
583 	pm_runtime_put_noidle(&pdev->dev);  in xenon_remove()
588 	clk_disable_unprepare(priv->axi_clk);  in xenon_remove()
589 	clk_disable_unprepare(pltfm_host->clk);  in xenon_remove()
606 	priv->restore_needed = true;  in xenon_suspend()
623 	if (host->tuning_mode != SDHCI_TUNING_MODE_3)  in xenon_runtime_suspend()
624 		mmc_retune_needed(host->mmc);  in xenon_runtime_suspend()
626 	clk_disable_unprepare(pltfm_host->clk);  in xenon_runtime_suspend()
628 	 * Need to update the priv->clock here, or when runtime resume  in xenon_runtime_suspend()
629 	 * back, phy don't aware the clock change and won't adjust phy  in xenon_runtime_suspend()
632 	priv->clock = 0;  in xenon_runtime_suspend()
643 	ret = clk_prepare_enable(pltfm_host->clk);  in xenon_runtime_resume()
649 	if (priv->restore_needed) {  in xenon_runtime_resume()
653 		priv->restore_needed = false;  in xenon_runtime_resume()
661 	clk_disable_unprepare(pltfm_host->clk);  in xenon_runtime_resume()
675 	{ .compatible = "marvell,armada-ap806-sdhci",},
676 	{ .compatible = "marvell,armada-cp110-sdhci",},
677 	{ .compatible = "marvell,armada-3700-sdhci",},
684 		.name	= "xenon-sdhci",