[linux.git] / drivers / scsi / ufs / ufshcd-pltfrm.c

/*
 * Universal Flash Storage Host controller Platform bus based glue driver
 *
 * This code is based on drivers/scsi/ufs/ufshcd-pltfrm.c
 * Copyright (C) 2011-2013 Samsung India Software Operations
 *
 * Authors:
 *	Santosh Yaraganavi <[email protected]>
 *	Vinayak Holikatti <[email protected]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * See the COPYING file in the top-level directory or visit
 * <http://www.gnu.org/licenses/gpl-2.0.html>
 *
 * 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.
 *
 * This program is provided "AS IS" and "WITH ALL FAULTS" and
 * without warranty of any kind. You are solely responsible for
 * determining the appropriateness of using and distributing
 * the program and assume all risks associated with your exercise
 * of rights with respect to the program, including but not limited
 * to infringement of third party rights, the risks and costs of
 * program errors, damage to or loss of data, programs or equipment,
 * and unavailability or interruption of operations. Under no
 * circumstances will the contributor of this Program be liable for
 * any damages of any kind arising from your use or distribution of
 * this program.
 */

#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>

#include "ufshcd.h"

static const struct of_device_id ufs_of_match[];
static struct ufs_hba_variant_ops *get_variant_ops(struct device *dev)
{
	if (dev->of_node) {
		const struct of_device_id *match;

		match = of_match_node(ufs_of_match, dev->of_node);
		if (match)
			return (struct ufs_hba_variant_ops *)match->data;
	}

	return NULL;
}

static int ufshcd_parse_clock_info(struct ufs_hba *hba)
{
	int ret = 0;
	int cnt;
	int i;
	struct device *dev = hba->dev;
	struct device_node *np = dev->of_node;
	char *name;
	u32 *clkfreq = NULL;
	struct ufs_clk_info *clki;
	int len = 0;
	size_t sz = 0;

	if (!np)
		goto out;

	INIT_LIST_HEAD(&hba->clk_list_head);

	cnt = of_property_count_strings(np, "clock-names");
	if (!cnt || (cnt == -EINVAL)) {
		dev_info(dev, "%s: Unable to find clocks, assuming enabled\n",
				__func__);
	} else if (cnt < 0) {
		dev_err(dev, "%s: count clock strings failed, err %d\n",
				__func__, cnt);
		ret = cnt;
	}

	if (cnt <= 0)
		goto out;

	if (!of_get_property(np, "freq-table-hz", &len)) {
		dev_info(dev, "freq-table-hz property not specified\n");
		goto out;
	}

	if (len <= 0)
		goto out;

	sz = len / sizeof(*clkfreq);
	if (sz != 2 * cnt) {
		dev_err(dev, "%s len mismatch\n", "freq-table-hz");
		ret = -EINVAL;
		goto out;
	}

	clkfreq = devm_kzalloc(dev, sz * sizeof(*clkfreq),
			GFP_KERNEL);
	if (!clkfreq) {
		ret = -ENOMEM;
		goto out;
	}

	ret = of_property_read_u32_array(np, "freq-table-hz",
			clkfreq, sz);
	if (ret && (ret != -EINVAL)) {
		dev_err(dev, "%s: error reading array %d\n",
				"freq-table-hz", ret);
		return ret;
	}

	for (i = 0; i < sz; i += 2) {
		ret = of_property_read_string_index(np,
				"clock-names", i/2, (const char **)&name);
		if (ret)
			goto out;

		clki = devm_kzalloc(dev, sizeof(*clki), GFP_KERNEL);
		if (!clki) {
			ret = -ENOMEM;
			goto out;
		}

		clki->min_freq = clkfreq[i];
		clki->max_freq = clkfreq[i+1];
		clki->name = kstrdup(name, GFP_KERNEL);
		dev_dbg(dev, "%s: min %u max %u name %s\n", "freq-table-hz",
				clki->min_freq, clki->max_freq, clki->name);
		list_add_tail(&clki->list, &hba->clk_list_head);
	}
out:
	return ret;
}

#define MAX_PROP_SIZE 32
static int ufshcd_populate_vreg(struct device *dev, const char *name,
		struct ufs_vreg **out_vreg)
{
	int ret = 0;
	char prop_name[MAX_PROP_SIZE];
	struct ufs_vreg *vreg = NULL;
	struct device_node *np = dev->of_node;

	if (!np) {
		dev_err(dev, "%s: non DT initialization\n", __func__);
		goto out;
	}

	snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", name);
	if (!of_parse_phandle(np, prop_name, 0)) {
		dev_info(dev, "%s: Unable to find %s regulator, assuming enabled\n",
				__func__, prop_name);
		goto out;
	}

	vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
	if (!vreg)
		return -ENOMEM;

	vreg->name = kstrdup(name, GFP_KERNEL);

	/* if fixed regulator no need further initialization */
	snprintf(prop_name, MAX_PROP_SIZE, "%s-fixed-regulator", name);
	if (of_property_read_bool(np, prop_name))
		goto out;

	snprintf(prop_name, MAX_PROP_SIZE, "%s-max-microamp", name);
	ret = of_property_read_u32(np, prop_name, &vreg->max_uA);
	if (ret) {
		dev_err(dev, "%s: unable to find %s err %d\n",
				__func__, prop_name, ret);
		goto out_free;
	}

	vreg->min_uA = 0;
	if (!strcmp(name, "vcc")) {
		if (of_property_read_bool(np, "vcc-supply-1p8")) {
			vreg->min_uV = UFS_VREG_VCC_1P8_MIN_UV;
			vreg->max_uV = UFS_VREG_VCC_1P8_MAX_UV;
		} else {
			vreg->min_uV = UFS_VREG_VCC_MIN_UV;
			vreg->max_uV = UFS_VREG_VCC_MAX_UV;
		}
	} else if (!strcmp(name, "vccq")) {
		vreg->min_uV = UFS_VREG_VCCQ_MIN_UV;
		vreg->max_uV = UFS_VREG_VCCQ_MAX_UV;
	} else if (!strcmp(name, "vccq2")) {
		vreg->min_uV = UFS_VREG_VCCQ2_MIN_UV;
		vreg->max_uV = UFS_VREG_VCCQ2_MAX_UV;
	}

	goto out;

out_free:
	devm_kfree(dev, vreg);
	vreg = NULL;
out:
	if (!ret)
		*out_vreg = vreg;
	return ret;
}

/**
 * ufshcd_parse_regulator_info - get regulator info from device tree
 * @hba: per adapter instance
 *
 * Get regulator info from device tree for vcc, vccq, vccq2 power supplies.
 * If any of the supplies are not defined it is assumed that they are always-on
 * and hence return zero. If the property is defined but parsing is failed
 * then return corresponding error.
 */
static int ufshcd_parse_regulator_info(struct ufs_hba *hba)
{
	int err;
	struct device *dev = hba->dev;
	struct ufs_vreg_info *info = &hba->vreg_info;

	err = ufshcd_populate_vreg(dev, "vdd-hba", &info->vdd_hba);
	if (err)
		goto out;

	err = ufshcd_populate_vreg(dev, "vcc", &info->vcc);
	if (err)
		goto out;

	err = ufshcd_populate_vreg(dev, "vccq", &info->vccq);
	if (err)
		goto out;

	err = ufshcd_populate_vreg(dev, "vccq2", &info->vccq2);
out:
	return err;
}

#ifdef CONFIG_PM
/**
 * ufshcd_pltfrm_suspend - suspend power management function
 * @dev: pointer to device handle
 *
 * Returns 0 if successful
 * Returns non-zero otherwise
 */
static int ufshcd_pltfrm_suspend(struct device *dev)
{
	return ufshcd_system_suspend(dev_get_drvdata(dev));
}

/**
 * ufshcd_pltfrm_resume - resume power management function
 * @dev: pointer to device handle
 *
 * Returns 0 if successful
 * Returns non-zero otherwise
 */
static int ufshcd_pltfrm_resume(struct device *dev)
{
	return ufshcd_system_resume(dev_get_drvdata(dev));
}

static int ufshcd_pltfrm_runtime_suspend(struct device *dev)
{
	return ufshcd_runtime_suspend(dev_get_drvdata(dev));
}
static int ufshcd_pltfrm_runtime_resume(struct device *dev)
{
	return ufshcd_runtime_resume(dev_get_drvdata(dev));
}
static int ufshcd_pltfrm_runtime_idle(struct device *dev)
{
	return ufshcd_runtime_idle(dev_get_drvdata(dev));
}
#else /* !CONFIG_PM */
#define ufshcd_pltfrm_suspend	NULL
#define ufshcd_pltfrm_resume	NULL
#define ufshcd_pltfrm_runtime_suspend	NULL
#define ufshcd_pltfrm_runtime_resume	NULL
#define ufshcd_pltfrm_runtime_idle	NULL
#endif /* CONFIG_PM */

static void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
{
	ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));
}

/**
 * ufshcd_pltfrm_probe - probe routine of the driver
 * @pdev: pointer to Platform device handle
 *
 * Returns 0 on success, non-zero value on failure
 */
static int ufshcd_pltfrm_probe(struct platform_device *pdev)
{
	struct ufs_hba *hba;
	void __iomem *mmio_base;
	struct resource *mem_res;
	int irq, err;
	struct device *dev = &pdev->dev;

	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	mmio_base = devm_ioremap_resource(dev, mem_res);
	if (IS_ERR(*(void **)&mmio_base)) {
		err = PTR_ERR(*(void **)&mmio_base);
		goto out;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(dev, "IRQ resource not available\n");
		err = -ENODEV;
		goto out;
	}

	err = ufshcd_alloc_host(dev, &hba);
	if (err) {
		dev_err(&pdev->dev, "Allocation failed\n");
		goto out;
	}

	hba->vops = get_variant_ops(&pdev->dev);

	err = ufshcd_parse_clock_info(hba);
	if (err) {
		dev_err(&pdev->dev, "%s: clock parse failed %d\n",
				__func__, err);
		goto out;
	}
	err = ufshcd_parse_regulator_info(hba);
	if (err) {
		dev_err(&pdev->dev, "%s: regulator init failed %d\n",
				__func__, err);
		goto out;
	}

	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);

	err = ufshcd_init(hba, mmio_base, irq);
	if (err) {
		dev_err(dev, "Intialization failed\n");
		goto out_disable_rpm;
	}

	platform_set_drvdata(pdev, hba);

	return 0;

out_disable_rpm:
	pm_runtime_disable(&pdev->dev);
	pm_runtime_set_suspended(&pdev->dev);
out:
	return err;
}

/**
 * ufshcd_pltfrm_remove - remove platform driver routine
 * @pdev: pointer to platform device handle
 *
 * Returns 0 on success, non-zero value on failure
 */
static int ufshcd_pltfrm_remove(struct platform_device *pdev)
{
	struct ufs_hba *hba =  platform_get_drvdata(pdev);

	pm_runtime_get_sync(&(pdev)->dev);
	ufshcd_remove(hba);
	return 0;
}

static const struct of_device_id ufs_of_match[] = {
	{ .compatible = "jedec,ufs-1.1"},
	{},
};

static const struct dev_pm_ops ufshcd_dev_pm_ops = {
	.suspend	= ufshcd_pltfrm_suspend,
	.resume		= ufshcd_pltfrm_resume,
	.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
	.runtime_resume  = ufshcd_pltfrm_runtime_resume,
	.runtime_idle    = ufshcd_pltfrm_runtime_idle,
};

static struct platform_driver ufshcd_pltfrm_driver = {
	.probe	= ufshcd_pltfrm_probe,
	.remove	= ufshcd_pltfrm_remove,
	.shutdown = ufshcd_pltfrm_shutdown,
	.driver	= {
		.name	= "ufshcd",
		.pm	= &ufshcd_dev_pm_ops,
		.of_match_table = ufs_of_match,
	},
};

module_platform_driver(ufshcd_pltfrm_driver);

MODULE_AUTHOR("Santosh Yaragnavi <[email protected]>");
MODULE_AUTHOR("Vinayak Holikatti <[email protected]>");
MODULE_DESCRIPTION("UFS host controller Pltform bus based glue driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(UFSHCD_DRIVER_VERSION);
Commit	Line	Data
03b1781a VH	1	/*
	2	* Universal Flash Storage Host controller Platform bus based glue driver
	3	*
	4	* This code is based on drivers/scsi/ufs/ufshcd-pltfrm.c
	5	* Copyright (C) 2011-2013 Samsung India Software Operations
	6	*
	7	* Authors:
	8	* Santosh Yaraganavi <[email protected]>
	9	* Vinayak Holikatti <[email protected]>
	10	*
	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License
	13	* as published by the Free Software Foundation; either version 2
	14	* of the License, or (at your option) any later version.
	15	* See the COPYING file in the top-level directory or visit
	16	* <http://www.gnu.org/licenses/gpl-2.0.html>
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* This program is provided "AS IS" and "WITH ALL FAULTS" and
	24	* without warranty of any kind. You are solely responsible for
	25	* determining the appropriateness of using and distributing
	26	* the program and assume all risks associated with your exercise
	27	* of rights with respect to the program, including but not limited
	28	* to infringement of third party rights, the risks and costs of
	29	* program errors, damage to or loss of data, programs or equipment,
	30	* and unavailability or interruption of operations. Under no
	31	* circumstances will the contributor of this Program be liable for
	32	* any damages of any kind arising from your use or distribution of
	33	* this program.
	34	*/
	35
03b1781a	36	#include <linux/platform_device.h>
62694735	37	#include <linux/pm_runtime.h>
5c0c28a8	38	#include <linux/of.h>
03b1781a	39
2953f850 SJ	40	#include "ufshcd.h"
2953f850 SJ	41
5c0c28a8 SRT	42	static const struct of_device_id ufs_of_match[];
	43	static struct ufs_hba_variant_ops get_variant_ops(struct device dev)
	44	{
	45	if (dev->of_node) {
	46	const struct of_device_id *match;
	47
	48	match = of_match_node(ufs_of_match, dev->of_node);
	49	if (match)
	50	return (struct ufs_hba_variant_ops *)match->data;
	51	}
	52
	53	return NULL;
	54	}
	55
c6e79dac SRT	56	static int ufshcd_parse_clock_info(struct ufs_hba *hba)
	57	{
	58	int ret = 0;
	59	int cnt;
	60	int i;
	61	struct device *dev = hba->dev;
	62	struct device_node *np = dev->of_node;
	63	char *name;
	64	u32 *clkfreq = NULL;
	65	struct ufs_clk_info *clki;
4cff6d99 ST	66	int len = 0;
4cff6d99 ST	67	size_t sz = 0;
c6e79dac SRT	68
	69	if (!np)
	70	goto out;
	71
	72	INIT_LIST_HEAD(&hba->clk_list_head);
	73
	74	cnt = of_property_count_strings(np, "clock-names");
	75	if (!cnt \|\| (cnt == -EINVAL)) {
	76	dev_info(dev, "%s: Unable to find clocks, assuming enabled\n",
	77	__func__);
	78	} else if (cnt < 0) {
	79	dev_err(dev, "%s: count clock strings failed, err %d\n",
	80	__func__, cnt);
	81	ret = cnt;
	82	}
	83
	84	if (cnt <= 0)
	85	goto out;
	86
4cff6d99 ST	87	if (!of_get_property(np, "freq-table-hz", &len)) {
	88	dev_info(dev, "freq-table-hz property not specified\n");
	89	goto out;
	90	}
	91
	92	if (len <= 0)
	93	goto out;
	94
	95	sz = len / sizeof(*clkfreq);
	96	if (sz != 2 * cnt) {
	97	dev_err(dev, "%s len mismatch\n", "freq-table-hz");
	98	ret = -EINVAL;
	99	goto out;
	100	}
	101
	102	clkfreq = devm_kzalloc(dev, sz * sizeof(*clkfreq),
	103	GFP_KERNEL);
c6e79dac SRT	104	if (!clkfreq) {
c6e79dac SRT	105	ret = -ENOMEM;
c6e79dac SRT	106	goto out;
	107	}
	108
4cff6d99 ST	109	ret = of_property_read_u32_array(np, "freq-table-hz",
4cff6d99 ST	110	clkfreq, sz);
c6e79dac	111	if (ret && (ret != -EINVAL)) {
4cff6d99 ST	112	dev_err(dev, "%s: error reading array %d\n",
4cff6d99 ST	113	"freq-table-hz", ret);
e8cb64db	114	return ret;
c6e79dac SRT	115	}
c6e79dac SRT	116
4cff6d99	117	for (i = 0; i < sz; i += 2) {
c6e79dac	118	ret = of_property_read_string_index(np,
4cff6d99	119	"clock-names", i/2, (const char **)&name);
c6e79dac	120	if (ret)
e8cb64db	121	goto out;
c6e79dac SRT	122
	123	clki = devm_kzalloc(dev, sizeof(*clki), GFP_KERNEL);
	124	if (!clki) {
	125	ret = -ENOMEM;
e8cb64db	126	goto out;
c6e79dac SRT	127	}
c6e79dac SRT	128
4cff6d99 ST	129	clki->min_freq = clkfreq[i];
4cff6d99 ST	130	clki->max_freq = clkfreq[i+1];
c6e79dac	131	clki->name = kstrdup(name, GFP_KERNEL);
4cff6d99 ST	132	dev_dbg(dev, "%s: min %u max %u name %s\n", "freq-table-hz",
4cff6d99 ST	133	clki->min_freq, clki->max_freq, clki->name);
c6e79dac SRT	134	list_add_tail(&clki->list, &hba->clk_list_head);
c6e79dac SRT	135	}
4cff6d99	136	out:
c6e79dac SRT	137	return ret;
	138	}
	139
aa497613 SRT	140	#define MAX_PROP_SIZE 32
	141	static int ufshcd_populate_vreg(struct device dev, const char name,
	142	struct ufs_vreg **out_vreg)
	143	{
	144	int ret = 0;
	145	char prop_name[MAX_PROP_SIZE];
	146	struct ufs_vreg *vreg = NULL;
	147	struct device_node *np = dev->of_node;
	148
	149	if (!np) {
	150	dev_err(dev, "%s: non DT initialization\n", __func__);
	151	goto out;
	152	}
	153
	154	snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", name);
	155	if (!of_parse_phandle(np, prop_name, 0)) {
	156	dev_info(dev, "%s: Unable to find %s regulator, assuming enabled\n",
	157	__func__, prop_name);
	158	goto out;
	159	}
	160
	161	vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
758581b9 DR	162	if (!vreg)
758581b9 DR	163	return -ENOMEM;
aa497613 SRT	164
	165	vreg->name = kstrdup(name, GFP_KERNEL);
	166
6a771a65 RS	167	/* if fixed regulator no need further initialization */
	168	snprintf(prop_name, MAX_PROP_SIZE, "%s-fixed-regulator", name);
	169	if (of_property_read_bool(np, prop_name))
	170	goto out;
	171
aa497613 SRT	172	snprintf(prop_name, MAX_PROP_SIZE, "%s-max-microamp", name);
	173	ret = of_property_read_u32(np, prop_name, &vreg->max_uA);
	174	if (ret) {
	175	dev_err(dev, "%s: unable to find %s err %d\n",
	176	__func__, prop_name, ret);
	177	goto out_free;
	178	}
	179
	180	vreg->min_uA = 0;
	181	if (!strcmp(name, "vcc")) {
	182	if (of_property_read_bool(np, "vcc-supply-1p8")) {
	183	vreg->min_uV = UFS_VREG_VCC_1P8_MIN_UV;
	184	vreg->max_uV = UFS_VREG_VCC_1P8_MAX_UV;
	185	} else {
	186	vreg->min_uV = UFS_VREG_VCC_MIN_UV;
	187	vreg->max_uV = UFS_VREG_VCC_MAX_UV;
	188	}
	189	} else if (!strcmp(name, "vccq")) {
	190	vreg->min_uV = UFS_VREG_VCCQ_MIN_UV;
	191	vreg->max_uV = UFS_VREG_VCCQ_MAX_UV;
	192	} else if (!strcmp(name, "vccq2")) {
	193	vreg->min_uV = UFS_VREG_VCCQ2_MIN_UV;
	194	vreg->max_uV = UFS_VREG_VCCQ2_MAX_UV;
	195	}
	196
	197	goto out;
	198
	199	out_free:
	200	devm_kfree(dev, vreg);
	201	vreg = NULL;
	202	out:
	203	if (!ret)
	204	*out_vreg = vreg;
	205	return ret;
	206	}
	207
	208	/**
	209	* ufshcd_parse_regulator_info - get regulator info from device tree
	210	* @hba: per adapter instance
	211	*
	212	* Get regulator info from device tree for vcc, vccq, vccq2 power supplies.
	213	* If any of the supplies are not defined it is assumed that they are always-on
	214	* and hence return zero. If the property is defined but parsing is failed
	215	* then return corresponding error.
	216	*/
	217	static int ufshcd_parse_regulator_info(struct ufs_hba *hba)
	218	{
	219	int err;
	220	struct device *dev = hba->dev;
	221	struct ufs_vreg_info *info = &hba->vreg_info;
	222
6a771a65 RS	223	err = ufshcd_populate_vreg(dev, "vdd-hba", &info->vdd_hba);
	224	if (err)
	225	goto out;
	226
aa497613 SRT	227	err = ufshcd_populate_vreg(dev, "vcc", &info->vcc);
	228	if (err)
	229	goto out;
	230
	231	err = ufshcd_populate_vreg(dev, "vccq", &info->vccq);
	232	if (err)
	233	goto out;
	234
	235	err = ufshcd_populate_vreg(dev, "vccq2", &info->vccq2);
	236	out:
	237	return err;
	238	}
	239
03b1781a VH	240	#ifdef CONFIG_PM
	241	/**
	242	* ufshcd_pltfrm_suspend - suspend power management function
	243	* @dev: pointer to device handle
	244	*
57d104c1 SJ	245	* Returns 0 if successful
57d104c1 SJ	246	* Returns non-zero otherwise
03b1781a VH	247	*/
	248	static int ufshcd_pltfrm_suspend(struct device *dev)
	249	{
57d104c1	250	return ufshcd_system_suspend(dev_get_drvdata(dev));
03b1781a VH	251	}
	252
	253	/**
	254	* ufshcd_pltfrm_resume - resume power management function
	255	* @dev: pointer to device handle
	256	*
57d104c1 SJ	257	* Returns 0 if successful
57d104c1 SJ	258	* Returns non-zero otherwise
03b1781a VH	259	*/
	260	static int ufshcd_pltfrm_resume(struct device *dev)
	261	{
57d104c1	262	return ufshcd_system_resume(dev_get_drvdata(dev));
03b1781a	263	}
03b1781a	264
62694735 SRT	265	static int ufshcd_pltfrm_runtime_suspend(struct device *dev)
62694735 SRT	266	{
57d104c1	267	return ufshcd_runtime_suspend(dev_get_drvdata(dev));
62694735 SRT	268	}
	269	static int ufshcd_pltfrm_runtime_resume(struct device *dev)
	270	{
57d104c1	271	return ufshcd_runtime_resume(dev_get_drvdata(dev));
62694735 SRT	272	}
	273	static int ufshcd_pltfrm_runtime_idle(struct device *dev)
	274	{
57d104c1	275	return ufshcd_runtime_idle(dev_get_drvdata(dev));
62694735	276	}
4f7ad521 RW	277	#else /* !CONFIG_PM */
	278	#define ufshcd_pltfrm_suspend NULL
	279	#define ufshcd_pltfrm_resume NULL
62694735 SRT	280	#define ufshcd_pltfrm_runtime_suspend NULL
	281	#define ufshcd_pltfrm_runtime_resume NULL
	282	#define ufshcd_pltfrm_runtime_idle NULL
4f7ad521	283	#endif /* CONFIG_PM */
62694735	284
57d104c1 SJ	285	static void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
	286	{
	287	ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));
	288	}
	289
03b1781a VH	290	/**
	291	* ufshcd_pltfrm_probe - probe routine of the driver
	292	* @pdev: pointer to Platform device handle
	293	*
	294	* Returns 0 on success, non-zero value on failure
	295	*/
	296	static int ufshcd_pltfrm_probe(struct platform_device *pdev)
	297	{
	298	struct ufs_hba *hba;
	299	void __iomem *mmio_base;
	300	struct resource *mem_res;
2953f850	301	int irq, err;
03b1781a VH	302	struct device *dev = &pdev->dev;
	303
	304	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2953f850	305	mmio_base = devm_ioremap_resource(dev, mem_res);
5c0c28a8 SRT	306	if (IS_ERR((void *)&mmio_base)) {
5c0c28a8 SRT	307	err = PTR_ERR((void *)&mmio_base);
2953f850	308	goto out;
03b1781a VH	309	}
03b1781a VH	310
2953f850 SJ	311	irq = platform_get_irq(pdev, 0);
	312	if (irq < 0) {
	313	dev_err(dev, "IRQ resource not available\n");
03b1781a	314	err = -ENODEV;
2953f850	315	goto out;
03b1781a VH	316	}
03b1781a VH	317
5c0c28a8 SRT	318	err = ufshcd_alloc_host(dev, &hba);
	319	if (err) {
	320	dev_err(&pdev->dev, "Allocation failed\n");
	321	goto out;
	322	}
	323
	324	hba->vops = get_variant_ops(&pdev->dev);
	325
c6e79dac SRT	326	err = ufshcd_parse_clock_info(hba);
	327	if (err) {
	328	dev_err(&pdev->dev, "%s: clock parse failed %d\n",
	329	__func__, err);
	330	goto out;
	331	}
aa497613 SRT	332	err = ufshcd_parse_regulator_info(hba);
	333	if (err) {
	334	dev_err(&pdev->dev, "%s: regulator init failed %d\n",
	335	__func__, err);
	336	goto out;
	337	}
	338
62694735 SRT	339	pm_runtime_set_active(&pdev->dev);
	340	pm_runtime_enable(&pdev->dev);
	341
5c0c28a8	342	err = ufshcd_init(hba, mmio_base, irq);
03b1781a	343	if (err) {
2953f850	344	dev_err(dev, "Intialization failed\n");
62694735	345	goto out_disable_rpm;
03b1781a VH	346	}
	347
	348	platform_set_drvdata(pdev, hba);
	349
62694735 SRT	350	return 0;
	351
	352	out_disable_rpm:
	353	pm_runtime_disable(&pdev->dev);
	354	pm_runtime_set_suspended(&pdev->dev);
2953f850	355	out:
03b1781a VH	356	return err;
	357	}
	358
	359	/**
	360	* ufshcd_pltfrm_remove - remove platform driver routine
	361	* @pdev: pointer to platform device handle
	362	*
	363	* Returns 0 on success, non-zero value on failure
	364	*/
	365	static int ufshcd_pltfrm_remove(struct platform_device *pdev)
	366	{
03b1781a VH	367	struct ufs_hba *hba = platform_get_drvdata(pdev);
03b1781a VH	368
62694735	369	pm_runtime_get_sync(&(pdev)->dev);
03b1781a	370	ufshcd_remove(hba);
03b1781a VH	371	return 0;
	372	}
	373
	374	static const struct of_device_id ufs_of_match[] = {
	375	{ .compatible = "jedec,ufs-1.1"},
2e2930a3	376	{},
03b1781a VH	377	};
	378
	379	static const struct dev_pm_ops ufshcd_dev_pm_ops = {
	380	.suspend = ufshcd_pltfrm_suspend,
	381	.resume = ufshcd_pltfrm_resume,
62694735 SRT	382	.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
	383	.runtime_resume = ufshcd_pltfrm_runtime_resume,
	384	.runtime_idle = ufshcd_pltfrm_runtime_idle,
03b1781a VH	385	};
	386
	387	static struct platform_driver ufshcd_pltfrm_driver = {
	388	.probe = ufshcd_pltfrm_probe,
	389	.remove = ufshcd_pltfrm_remove,
57d104c1	390	.shutdown = ufshcd_pltfrm_shutdown,
03b1781a VH	391	.driver = {
03b1781a VH	392	.name = "ufshcd",
03b1781a VH	393	.pm = &ufshcd_dev_pm_ops,
	394	.of_match_table = ufs_of_match,
	395	},
	396	};
	397
	398	module_platform_driver(ufshcd_pltfrm_driver);
	399
	400	MODULE_AUTHOR("Santosh Yaragnavi <[email protected]>");
	401	MODULE_AUTHOR("Vinayak Holikatti <[email protected]>");
	402	MODULE_DESCRIPTION("UFS host controller Pltform bus based glue driver");
	403	MODULE_LICENSE("GPL");
	404	MODULE_VERSION(UFSHCD_DRIVER_VERSION);