[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / drivers / mmc / host / sdhci-brcmstb.c

/*
 * sdhci-brcmstb.c Support for SDHCI on Broadcom BRCMSTB SoC's
 *
 * Copyright (C) 2015 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/io.h>
#include <linux/mmc/host.h>
#include <linux/module.h>
#include <linux/of.h>

#include "sdhci-pltfm.h"

static const struct sdhci_ops sdhci_brcmstb_ops = {
	.set_clock = sdhci_set_clock,
	.set_bus_width = sdhci_set_bus_width,
	.reset = sdhci_reset,
	.set_uhs_signaling = sdhci_set_uhs_signaling,
};

static const struct sdhci_pltfm_data sdhci_brcmstb_pdata = {
	.ops = &sdhci_brcmstb_ops,
};

static int sdhci_brcmstb_probe(struct platform_device *pdev)
{
	struct sdhci_host *host;
	struct sdhci_pltfm_host *pltfm_host;
	struct clk *clk;
	int res;

	clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(clk)) {
		dev_err(&pdev->dev, "Clock not found in Device Tree\n");
		clk = NULL;
	}
	res = clk_prepare_enable(clk);
	if (res)
		return res;

	host = sdhci_pltfm_init(pdev, &sdhci_brcmstb_pdata, 0);
	if (IS_ERR(host)) {
		res = PTR_ERR(host);
		goto err_clk;
	}

	sdhci_get_of_property(pdev);
	mmc_of_parse(host->mmc);

	/*
	 * Supply the existing CAPS, but clear the UHS modes. This
	 * will allow these modes to be specified by device tree
	 * properties through mmc_of_parse().
	 */
	host->caps = sdhci_readl(host, SDHCI_CAPABILITIES);
	if (of_device_is_compatible(pdev->dev.of_node, "brcm,bcm7425-sdhci"))
		host->caps &= ~SDHCI_CAN_64BIT;
	host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
	host->caps1 &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_SDR104 |
			SDHCI_SUPPORT_DDR50);
	host->quirks |= SDHCI_QUIRK_MISSING_CAPS |
		SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;

	res = sdhci_add_host(host);
	if (res)
		goto err;

	pltfm_host = sdhci_priv(host);
	pltfm_host->clk = clk;
	return res;

err:
	sdhci_pltfm_free(pdev);
err_clk:
	clk_disable_unprepare(clk);
	return res;
}

static const struct of_device_id sdhci_brcm_of_match[] = {
	{ .compatible = "brcm,bcm7425-sdhci" },
	{ .compatible = "brcm,bcm7445-sdhci" },
	{},
};
MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match);

static struct platform_driver sdhci_brcmstb_driver = {
	.driver		= {
		.name	= "sdhci-brcmstb",
		.pm	= &sdhci_pltfm_pmops,
		.of_match_table = of_match_ptr(sdhci_brcm_of_match),
	},
	.probe		= sdhci_brcmstb_probe,
	.remove		= sdhci_pltfm_unregister,
};

module_platform_driver(sdhci_brcmstb_driver);

MODULE_DESCRIPTION("SDHCI driver for Broadcom BRCMSTB SoCs");
MODULE_AUTHOR("Broadcom");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
476bf3d6 AC	1	/*
	2	* sdhci-brcmstb.c Support for SDHCI on Broadcom BRCMSTB SoC's
	3	*
	4	* Copyright (C) 2015 Broadcom Corporation
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	*/
	16
	17	#include <linux/io.h>
	18	#include <linux/mmc/host.h>
	19	#include <linux/module.h>
	20	#include <linux/of.h>
	21
	22	#include "sdhci-pltfm.h"
	23
476bf3d6 AC	24	static const struct sdhci_ops sdhci_brcmstb_ops = {
	25	.set_clock = sdhci_set_clock,
	26	.set_bus_width = sdhci_set_bus_width,
	27	.reset = sdhci_reset,
	28	.set_uhs_signaling = sdhci_set_uhs_signaling,
	29	};
	30
36719676	31	static const struct sdhci_pltfm_data sdhci_brcmstb_pdata = {
476bf3d6 AC	32	.ops = &sdhci_brcmstb_ops,
	33	};
	34
	35	static int sdhci_brcmstb_probe(struct platform_device *pdev)
	36	{
	37	struct sdhci_host *host;
	38	struct sdhci_pltfm_host *pltfm_host;
	39	struct clk *clk;
	40	int res;
	41
	42	clk = devm_clk_get(&pdev->dev, NULL);
	43	if (IS_ERR(clk)) {
	44	dev_err(&pdev->dev, "Clock not found in Device Tree\n");
	45	clk = NULL;
	46	}
	47	res = clk_prepare_enable(clk);
	48	if (res)
	49	return res;
	50
	51	host = sdhci_pltfm_init(pdev, &sdhci_brcmstb_pdata, 0);
	52	if (IS_ERR(host)) {
	53	res = PTR_ERR(host);
	54	goto err_clk;
	55	}
	56
476bf3d6 AC	57	sdhci_get_of_property(pdev);
	58	mmc_of_parse(host->mmc);
	59
	60	/*
	61	* Supply the existing CAPS, but clear the UHS modes. This
	62	* will allow these modes to be specified by device tree
	63	* properties through mmc_of_parse().
	64	*/
	65	host->caps = sdhci_readl(host, SDHCI_CAPABILITIES);
6a3d8ced JS	66	if (of_device_is_compatible(pdev->dev.of_node, "brcm,bcm7425-sdhci"))
6a3d8ced JS	67	host->caps &= ~SDHCI_CAN_64BIT;
476bf3d6 AC	68	host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
	69	host->caps1 &= ~(SDHCI_SUPPORT_SDR50 \| SDHCI_SUPPORT_SDR104 \|
	70	SDHCI_SUPPORT_DDR50);
	71	host->quirks \|= SDHCI_QUIRK_MISSING_CAPS \|
	72	SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
	73
	74	res = sdhci_add_host(host);
	75	if (res)
	76	goto err;
	77
	78	pltfm_host = sdhci_priv(host);
	79	pltfm_host->clk = clk;
	80	return res;
	81
	82	err:
	83	sdhci_pltfm_free(pdev);
	84	err_clk:
	85	clk_disable_unprepare(clk);
	86	return res;
	87	}
	88
	89	static const struct of_device_id sdhci_brcm_of_match[] = {
	90	{ .compatible = "brcm,bcm7425-sdhci" },
6a3d8ced	91	{ .compatible = "brcm,bcm7445-sdhci" },
476bf3d6 AC	92	{},
	93	};
	94	MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match);
	95
	96	static struct platform_driver sdhci_brcmstb_driver = {
	97	.driver = {
	98	.name = "sdhci-brcmstb",
1ab0d2d7	99	.pm = &sdhci_pltfm_pmops,
476bf3d6 AC	100	.of_match_table = of_match_ptr(sdhci_brcm_of_match),
	101	},
	102	.probe = sdhci_brcmstb_probe,
	103	.remove = sdhci_pltfm_unregister,
	104	};
	105
	106	module_platform_driver(sdhci_brcmstb_driver);
	107
	108	MODULE_DESCRIPTION("SDHCI driver for Broadcom BRCMSTB SoCs");
	109	MODULE_AUTHOR("Broadcom");
	110	MODULE_LICENSE("GPL v2");