1 // SPDX-License-Identifier: GPL-2.0-only
8  * Date:	2016-8-24
15 #include <linux/delay.h>
22 #include "sdhci-pltfm.h"
23 #include "sdhci-xenon.h"
25 static int xenon_enable_internal_clk(struct sdhci_host *host)  in xenon_enable_internal_clk()
42 			dev_err(mmc_dev(host->mmc), "Internal clock never stabilised.\n");  in xenon_enable_internal_clk()
43 			return -ETIMEDOUT;  in xenon_enable_internal_clk()
51 /* Set SDCLK-off-while-idle */
92 	host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;  in xenon_enable_sdhc()
97 	host->mmc->caps &= ~MMC_CAP_BUS_WIDTH_TEST;  in xenon_enable_sdhc()
138 	/* Disable the Re-Tuning Request functionality */  in xenon_retune_setup()
143 	/* Disable the Re-tuning Interrupt */  in xenon_retune_setup()
152 	host->tuning_mode = SDHCI_TUNING_MODE_1;  in xenon_retune_setup()
153 	/* Set re-tuning period */  in xenon_retune_setup()
154 	host->tuning_count = 1 << (priv->tuning_count - 1);  in xenon_retune_setup()
168 	/* Disable tuning request and auto-retuning again */  in xenon_reset_exit()
189 	xenon_reset_exit(host, priv->sdhc_id, mask);  in xenon_reset()
193  * Xenon defines different values for HS200 and HS400
197 				    unsigned int timing)  in xenon_set_uhs_signaling()
225 	struct mmc_host *mmc = host->mmc;  in xenon_set_power()
226 	u8 pwr = host->pwr;  in xenon_set_power()
230 	if (host->pwr == pwr)  in xenon_set_power()
233 	if (host->pwr == 0)  in xenon_set_power()
236 	if (!IS_ERR(mmc->supply.vmmc))  in xenon_set_power()
237 		mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);  in xenon_set_power()
256 static unsigned int xenon_get_max_clock(struct sdhci_host *host)  in xenon_get_max_clock()
260 	if (pltfm_host->clk)  in xenon_get_max_clock()
263 		return pltfm_host->clock;  in xenon_get_max_clock()
294 	 * HS400/HS200/eMMC HS doesn't have Preset Value register.  in xenon_set_ios()
295 	 * However, sdhci_set_ios will read HS400/HS200 Preset register.  in xenon_set_ios()
296 	 * Disable Preset Value register for HS400/HS200.  in xenon_set_ios()
300 	if ((ios->timing == MMC_TIMING_MMC_HS400) ||  in xenon_set_ios()
301 	    (ios->timing == MMC_TIMING_MMC_HS200) ||  in xenon_set_ios()
302 	    (ios->timing == MMC_TIMING_MMC_HS)) {  in xenon_set_ios()
303 		host->preset_enabled = false;  in xenon_set_ios()
304 		host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;  in xenon_set_ios()
305 		host->flags &= ~SDHCI_PV_ENABLED;  in xenon_set_ios()
311 		host->quirks2 &= ~SDHCI_QUIRK2_PRESET_VALUE_BROKEN;  in xenon_set_ios()
317 	if (host->clock > XENON_DEFAULT_SDCLK_FREQ)  in xenon_set_ios()
318 		xenon_set_sdclk_off_idle(host, priv->sdhc_id, true);  in xenon_set_ios()
321 static int xenon_start_signal_voltage_switch(struct mmc_host *mmc,  in xenon_start_signal_voltage_switch()
338 	xenon_soc_pad_ctrl(host, ios->signal_voltage);  in xenon_start_signal_voltage_switch()
345 	if (PTR_ERR(mmc->supply.vqmmc) == -ENODEV)  in xenon_start_signal_voltage_switch()
353  * priv->init_card_type will be used in PHY timing adjustment.
362 	priv->init_card_type = card->type;  in xenon_init_card()
365 static int xenon_execute_tuning(struct mmc_host *mmc, u32 opcode)  in xenon_execute_tuning()
369 	if (host->timing == MMC_TIMING_UHS_DDR50 ||  in xenon_execute_tuning()
370 		host->timing == MMC_TIMING_MMC_DDR52)  in xenon_execute_tuning()
378 	if (host->tuning_mode != SDHCI_TUNING_MODE_1)  in xenon_execute_tuning()
384 static void xenon_enable_sdio_irq(struct mmc_host *mmc, int enable)  in xenon_enable_sdio_irq()
390 	u8 sdhc_id = priv->sdhc_id;  in xenon_enable_sdio_irq()
412 	host->mmc_host_ops.set_ios = xenon_set_ios;  in xenon_replace_mmc_host_ops()
413 	host->mmc_host_ops.start_signal_voltage_switch =  in xenon_replace_mmc_host_ops()
415 	host->mmc_host_ops.init_card = xenon_init_card;  in xenon_replace_mmc_host_ops()
416 	host->mmc_host_ops.execute_tuning = xenon_execute_tuning;  in xenon_replace_mmc_host_ops()
417 	host->mmc_host_ops.enable_sdio_irq = xenon_enable_sdio_irq;  in xenon_replace_mmc_host_ops()
422  * sdhc-id: the index of current SDHC.
424  * tun-count: the interval between re-tuning
426 static int xenon_probe_params(struct platform_device *pdev)  in xenon_probe_params()
428 	struct device *dev = &pdev->dev;  in xenon_probe_params()
430 	struct mmc_host *mmc = host->mmc;  in xenon_probe_params()
436 	/* Disable HS200 on Armada AP806 */  in xenon_probe_params()
437 	if (priv->hw_version == XENON_AP806)  in xenon_probe_params()
438 		host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;  in xenon_probe_params()
441 	if (!device_property_read_u32(dev, "marvell,xenon-sdhc-id", &sdhc_id)) {  in xenon_probe_params()
447 			return -EINVAL;  in xenon_probe_params()
450 	priv->sdhc_id = sdhc_id;  in xenon_probe_params()
453 	if (!device_property_read_u32(dev, "marvell,xenon-tun-count",  in xenon_probe_params()
456 			dev_err(mmc_dev(mmc), "Wrong Re-tuning Count. Set default value %d\n",  in xenon_probe_params()
461 	priv->tuning_count = tuning_count;  in xenon_probe_params()
466 static int xenon_sdhc_prepare(struct sdhci_host *host)  in xenon_sdhc_prepare()
470 	u8 sdhc_id = priv->sdhc_id;  in xenon_sdhc_prepare()
481 	/* Disable SDCLK-Off-While-Idle before card init */  in xenon_sdhc_prepare()
493 	u8 sdhc_id = priv->sdhc_id;  in xenon_sdhc_unprepare()
499 static int xenon_probe(struct platform_device *pdev)  in xenon_probe()
502 	struct device *dev = &pdev->dev;  in xenon_probe()
505 	int err;  in xenon_probe()
515 	priv->hw_version = (unsigned long)device_get_match_data(&pdev->dev);  in xenon_probe()
523 	if (dev->of_node) {  in xenon_probe()
524 		pltfm_host->clk = devm_clk_get(&pdev->dev, "core");  in xenon_probe()
525 		if (IS_ERR(pltfm_host->clk)) {  in xenon_probe()
526 			err = PTR_ERR(pltfm_host->clk);  in xenon_probe()
527 			dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err);  in xenon_probe()
530 		err = clk_prepare_enable(pltfm_host->clk);  in xenon_probe()
534 		priv->axi_clk = devm_clk_get(&pdev->dev, "axi");  in xenon_probe()
535 		if (IS_ERR(priv->axi_clk)) {  in xenon_probe()
536 			err = PTR_ERR(priv->axi_clk);  in xenon_probe()
537 			if (err == -EPROBE_DEFER)  in xenon_probe()
540 			err = clk_prepare_enable(priv->axi_clk);  in xenon_probe()
546 	err = mmc_of_parse(host->mmc);  in xenon_probe()
563 	pm_runtime_get_noresume(&pdev->dev);  in xenon_probe()
564 	pm_runtime_set_active(&pdev->dev);  in xenon_probe()
565 	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);  in xenon_probe()
566 	pm_runtime_use_autosuspend(&pdev->dev);  in xenon_probe()
567 	pm_runtime_enable(&pdev->dev);  in xenon_probe()
568 	pm_suspend_ignore_children(&pdev->dev, 1);  in xenon_probe()
574 	pm_runtime_put_autosuspend(&pdev->dev);  in xenon_probe()
579 	pm_runtime_disable(&pdev->dev);  in xenon_probe()
580 	pm_runtime_put_noidle(&pdev->dev);  in xenon_probe()
583 	clk_disable_unprepare(priv->axi_clk);  in xenon_probe()
585 	clk_disable_unprepare(pltfm_host->clk);  in xenon_probe()
591 static int xenon_remove(struct platform_device *pdev)  in xenon_remove()
597 	pm_runtime_get_sync(&pdev->dev);  in xenon_remove()
598 	pm_runtime_disable(&pdev->dev);  in xenon_remove()
599 	pm_runtime_put_noidle(&pdev->dev);  in xenon_remove()
604 	clk_disable_unprepare(priv->axi_clk);  in xenon_remove()
605 	clk_disable_unprepare(pltfm_host->clk);  in xenon_remove()
613 static int xenon_suspend(struct device *dev)  in xenon_suspend()
618 	int ret;  in xenon_suspend()
622 	priv->restore_needed = true;  in xenon_suspend()
628 static int xenon_runtime_suspend(struct device *dev)  in xenon_runtime_suspend()
633 	int ret;  in xenon_runtime_suspend()
639 	if (host->tuning_mode != SDHCI_TUNING_MODE_3)  in xenon_runtime_suspend()
640 		mmc_retune_needed(host->mmc);  in xenon_runtime_suspend()
642 	clk_disable_unprepare(pltfm_host->clk);  in xenon_runtime_suspend()
644 	 * Need to update the priv->clock here, or when runtime resume  in xenon_runtime_suspend()
646 	 * which will cause cmd err  in xenon_runtime_suspend()
648 	priv->clock = 0;  in xenon_runtime_suspend()
652 static int xenon_runtime_resume(struct device *dev)  in xenon_runtime_resume()
657 	int ret;  in xenon_runtime_resume()
659 	ret = clk_prepare_enable(pltfm_host->clk);  in xenon_runtime_resume()
665 	if (priv->restore_needed) {  in xenon_runtime_resume()
669 		priv->restore_needed = false;  in xenon_runtime_resume()
677 	clk_disable_unprepare(pltfm_host->clk);  in xenon_runtime_resume()
691 	{ .compatible = "marvell,armada-ap806-sdhci", .data = (void *)XENON_AP806},
692 	{ .compatible = "marvell,armada-ap807-sdhci", .data = (void *)XENON_AP807},
693 	{ .compatible = "marvell,armada-cp110-sdhci", .data =  (void *)XENON_CP110},
694 	{ .compatible = "marvell,armada-3700-sdhci", .data =  (void *)XENON_A3700},
711 		.name	= "xenon-sdhci",