[linux-2.6-block.git] / drivers / mmc / host / dw_mmc-pltfm.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Synopsys DesignWare Multimedia Card Interface driver
 *
 * Copyright (C) 2009 NXP Semiconductors
 * Copyright (C) 2009, 2010 Imagination Technologies Ltd.
 */

#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/of.h>
#include <linux/mfd/altera-sysmgr.h>
#include <linux/regmap.h>

#include "dw_mmc.h"
#include "dw_mmc-pltfm.h"

#define SOCFPGA_DW_MMC_CLK_PHASE_STEP	45
#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel, reg_shift) \
	((((smplsel) & 0x7) << reg_shift) | (((drvsel) & 0x7) << 0))

int dw_mci_pltfm_register(struct platform_device *pdev,
			  const struct dw_mci_drv_data *drv_data)
{
	struct dw_mci *host;
	struct resource	*regs;

	host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
	if (!host)
		return -ENOMEM;

	host->irq = platform_get_irq(pdev, 0);
	if (host->irq < 0)
		return host->irq;

	host->drv_data = drv_data;
	host->dev = &pdev->dev;
	host->irq_flags = 0;
	host->pdata = pdev->dev.platform_data;

	host->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &regs);
	if (IS_ERR(host->regs))
		return PTR_ERR(host->regs);

	/* Get registers' physical base address */
	host->phy_regs = regs->start;

	platform_set_drvdata(pdev, host);
	return dw_mci_probe(host);
}
EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);

const struct dev_pm_ops dw_mci_pltfm_pmops = {
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
				pm_runtime_force_resume)
	SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
			   dw_mci_runtime_resume,
			   NULL)
};
EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);

static int dw_mci_socfpga_priv_init(struct dw_mci *host)
{
	struct device_node *np = host->dev->of_node;
	struct regmap *sys_mgr_base_addr;
	u32 clk_phase[2] = {0}, reg_offset, reg_shift;
	int i, rc, hs_timing;

	rc = of_property_read_variable_u32_array(np, "clk-phase-sd-hs", &clk_phase[0], 2, 0);
	if (rc < 0)
		return 0;

	sys_mgr_base_addr = altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
	if (IS_ERR(sys_mgr_base_addr)) {
		dev_warn(host->dev, "clk-phase-sd-hs was specified, but failed to find altr,sys-mgr regmap!\n");
		return 0;
	}

	of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, &reg_offset);
	of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, &reg_shift);

	for (i = 0; i < ARRAY_SIZE(clk_phase); i++)
		clk_phase[i] /= SOCFPGA_DW_MMC_CLK_PHASE_STEP;

	hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1], reg_shift);
	regmap_write(sys_mgr_base_addr, reg_offset, hs_timing);

	return 0;
}

static const struct dw_mci_drv_data socfpga_drv_data = {
	.init		= dw_mci_socfpga_priv_init,
};

static const struct of_device_id dw_mci_pltfm_match[] = {
	{ .compatible = "snps,dw-mshc", },
	{ .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, },
	{ .compatible = "img,pistachio-dw-mshc", },
	{},
};
MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);

static int dw_mci_pltfm_probe(struct platform_device *pdev)
{
	const struct dw_mci_drv_data *drv_data = NULL;
	const struct of_device_id *match;

	if (pdev->dev.of_node) {
		match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
		drv_data = match->data;
	}

	return dw_mci_pltfm_register(pdev, drv_data);
}

void dw_mci_pltfm_remove(struct platform_device *pdev)
{
	struct dw_mci *host = platform_get_drvdata(pdev);

	dw_mci_remove(host);
}
EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);

static struct platform_driver dw_mci_pltfm_driver = {
	.probe		= dw_mci_pltfm_probe,
	.remove_new	= dw_mci_pltfm_remove,
	.driver		= {
		.name		= "dw_mmc",
		.probe_type	= PROBE_PREFER_ASYNCHRONOUS,
		.of_match_table	= dw_mci_pltfm_match,
		.pm		= &dw_mci_pltfm_pmops,
	},
};

module_platform_driver(dw_mci_pltfm_driver);

MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
MODULE_AUTHOR("NXP Semiconductor VietNam");
MODULE_AUTHOR("Imagination Technologies Ltd");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
62ca8034 SH	2	/*
	3	* Synopsys DesignWare Multimedia Card Interface driver
	4	*
	5	* Copyright (C) 2009 NXP Semiconductors
	6	* Copyright (C) 2009, 2010 Imagination Technologies Ltd.
62ca8034 SH	7	*/
62ca8034 SH	8
a3e2cd7f	9	#include <linux/err.h>
62ca8034 SH	10	#include <linux/interrupt.h>
	11	#include <linux/module.h>
	12	#include <linux/io.h>
	13	#include <linux/irq.h>
	14	#include <linux/platform_device.h>
ee2112be	15	#include <linux/pm_runtime.h>
62ca8034 SH	16	#include <linux/slab.h>
	17	#include <linux/mmc/host.h>
	18	#include <linux/mmc/mmc.h>
c91eab4b	19	#include <linux/of.h>
ef87bd81 DN	20	#include <linux/mfd/altera-sysmgr.h>
ef87bd81 DN	21	#include <linux/regmap.h>
c91eab4b	22
62ca8034	23	#include "dw_mmc.h"
7725a52c	24	#include "dw_mmc-pltfm.h"
62ca8034	25
ef87bd81 DN	26	#define SOCFPGA_DW_MMC_CLK_PHASE_STEP 45
	27	#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel, reg_shift) \
	28	((((smplsel) & 0x7) << reg_shift) \| (((drvsel) & 0x7) << 0))
	29
800d78bf	30	int dw_mci_pltfm_register(struct platform_device *pdev,
bcc87666	31	const struct dw_mci_drv_data *drv_data)
62ca8034 SH	32	{
	33	struct dw_mci *host;
	34	struct resource *regs;
62ca8034	35
bb8bdc77	36	host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
62ca8034 SH	37	if (!host)
	38	return -ENOMEM;
	39
62ca8034	40	host->irq = platform_get_irq(pdev, 0);
bb8bdc77 TA	41	if (host->irq < 0)
bb8bdc77 TA	42	return host->irq;
62ca8034	43
800d78bf	44	host->drv_data = drv_data;
4a90920c	45	host->dev = &pdev->dev;
62ca8034 SH	46	host->irq_flags = 0;
62ca8034 SH	47	host->pdata = pdev->dev.platform_data;
bcc87666	48
220b484f	49	host->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &regs);
a3e2cd7f TR	50	if (IS_ERR(host->regs))
a3e2cd7f TR	51	return PTR_ERR(host->regs);
bb8bdc77	52
45c7a490 JC	53	/* Get registers' physical base address */
	54	host->phy_regs = regs->start;
	55
62ca8034	56	platform_set_drvdata(pdev, host);
dd369800	57	return dw_mci_probe(host);
62ca8034	58	}
17403f23 TA	59	EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
17403f23 TA	60
ee2112be SL	61	const struct dev_pm_ops dw_mci_pltfm_pmops = {
	62	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
	63	pm_runtime_force_resume)
	64	SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
	65	dw_mci_runtime_resume,
	66	NULL)
	67	};
17403f23	68	EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
62ca8034	69
ef87bd81 DN	70	static int dw_mci_socfpga_priv_init(struct dw_mci *host)
	71	{
	72	struct device_node *np = host->dev->of_node;
	73	struct regmap *sys_mgr_base_addr;
	74	u32 clk_phase[2] = {0}, reg_offset, reg_shift;
	75	int i, rc, hs_timing;
	76
	77	rc = of_property_read_variable_u32_array(np, "clk-phase-sd-hs", &clk_phase[0], 2, 0);
	78	if (rc < 0)
	79	return 0;
	80
	81	sys_mgr_base_addr = altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
	82	if (IS_ERR(sys_mgr_base_addr)) {
	83	dev_warn(host->dev, "clk-phase-sd-hs was specified, but failed to find altr,sys-mgr regmap!\n");
	84	return 0;
	85	}
	86
	87	of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, &reg_offset);
	88	of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, &reg_shift);
	89
	90	for (i = 0; i < ARRAY_SIZE(clk_phase); i++)
	91	clk_phase[i] /= SOCFPGA_DW_MMC_CLK_PHASE_STEP;
	92
	93	hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1], reg_shift);
	94	regmap_write(sys_mgr_base_addr, reg_offset, hs_timing);
	95
	96	return 0;
	97	}
	98
	99	static const struct dw_mci_drv_data socfpga_drv_data = {
	100	.init = dw_mci_socfpga_priv_init,
	101	};
	102
c91eab4b TA	103	static const struct of_device_id dw_mci_pltfm_match[] = {
c91eab4b TA	104	{ .compatible = "snps,dw-mshc", },
ef87bd81	105	{ .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, },
aaaaeb7a	106	{ .compatible = "img,pistachio-dw-mshc", },
c91eab4b TA	107	{},
	108	};
	109	MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
	110
b177a530 HS	111	static int dw_mci_pltfm_probe(struct platform_device *pdev)
b177a530 HS	112	{
c73e41c8 HS	113	const struct dw_mci_drv_data *drv_data = NULL;
	114	const struct of_device_id *match;
	115
	116	if (pdev->dev.of_node) {
	117	match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
	118	drv_data = match->data;
	119	}
	120
	121	return dw_mci_pltfm_register(pdev, drv_data);
b177a530 HS	122	}
b177a530 HS	123
982fe2e0	124	void dw_mci_pltfm_remove(struct platform_device *pdev)
b177a530 HS	125	{
	126	struct dw_mci *host = platform_get_drvdata(pdev);
	127
	128	dw_mci_remove(host);
b177a530 HS	129	}
	130	EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
	131
62ca8034	132	static struct platform_driver dw_mci_pltfm_driver = {
49480cf2	133	.probe = dw_mci_pltfm_probe,
982fe2e0	134	.remove_new = dw_mci_pltfm_remove,
62ca8034 SH	135	.driver = {
62ca8034 SH	136	.name = "dw_mmc",
21b2cec6	137	.probe_type = PROBE_PREFER_ASYNCHRONOUS,
cf109bc0	138	.of_match_table = dw_mci_pltfm_match,
62ca8034 SH	139	.pm = &dw_mci_pltfm_pmops,
	140	},
	141	};
	142
49480cf2	143	module_platform_driver(dw_mci_pltfm_driver);
62ca8034 SH	144
	145	MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
	146	MODULE_AUTHOR("NXP Semiconductor VietNam");
	147	MODULE_AUTHOR("Imagination Technologies Ltd");
	148	MODULE_LICENSE("GPL v2");