[people/arne_f/kernel.git] / drivers / remoteproc / imx_rproc.c

/*
 * Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
 *
 * 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.
 */

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/remoteproc.h>

#define IMX7D_SRC_SCR			0x0C
#define IMX7D_ENABLE_M4			BIT(3)
#define IMX7D_SW_M4P_RST		BIT(2)
#define IMX7D_SW_M4C_RST		BIT(1)
#define IMX7D_SW_M4C_NON_SCLR_RST	BIT(0)

#define IMX7D_M4_RST_MASK		(IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \
					 | IMX7D_SW_M4C_RST \
					 | IMX7D_SW_M4C_NON_SCLR_RST)

#define IMX7D_M4_START			(IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \
					 | IMX7D_SW_M4C_RST)
#define IMX7D_M4_STOP			IMX7D_SW_M4C_NON_SCLR_RST

/* Address: 0x020D8000 */
#define IMX6SX_SRC_SCR			0x00
#define IMX6SX_ENABLE_M4		BIT(22)
#define IMX6SX_SW_M4P_RST		BIT(12)
#define IMX6SX_SW_M4C_NON_SCLR_RST	BIT(4)
#define IMX6SX_SW_M4C_RST		BIT(3)

#define IMX6SX_M4_START			(IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \
					 | IMX6SX_SW_M4C_RST)
#define IMX6SX_M4_STOP			IMX6SX_SW_M4C_NON_SCLR_RST
#define IMX6SX_M4_RST_MASK		(IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \
					 | IMX6SX_SW_M4C_NON_SCLR_RST \
					 | IMX6SX_SW_M4C_RST)

#define IMX7D_RPROC_MEM_MAX		8

/**
 * struct imx_rproc_mem - slim internal memory structure
 * @cpu_addr: MPU virtual address of the memory region
 * @sys_addr: Bus address used to access the memory region
 * @size: Size of the memory region
 */
struct imx_rproc_mem {
	void __iomem *cpu_addr;
	phys_addr_t sys_addr;
	size_t size;
};

/* att flags */
/* M4 own area. Can be mapped at probe */
#define ATT_OWN		BIT(1)

/* address translation table */
struct imx_rproc_att {
	u32 da;	/* device address (From Cortex M4 view)*/
	u32 sa;	/* system bus address */
	u32 size; /* size of reg range */
	int flags;
};

struct imx_rproc_dcfg {
	u32				src_reg;
	u32				src_mask;
	u32				src_start;
	u32				src_stop;
	const struct imx_rproc_att	*att;
	size_t				att_size;
};

struct imx_rproc {
	struct device			*dev;
	struct regmap			*regmap;
	struct rproc			*rproc;
	const struct imx_rproc_dcfg	*dcfg;
	struct imx_rproc_mem		mem[IMX7D_RPROC_MEM_MAX];
	struct clk			*clk;
};

static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
	/* dev addr , sys addr  , size	    , flags */
	/* OCRAM_S (M4 Boot code) - alias */
	{ 0x00000000, 0x00180000, 0x00008000, 0 },
	/* OCRAM_S (Code) */
	{ 0x00180000, 0x00180000, 0x00008000, ATT_OWN },
	/* OCRAM (Code) - alias */
	{ 0x00900000, 0x00900000, 0x00020000, 0 },
	/* OCRAM_EPDC (Code) - alias */
	{ 0x00920000, 0x00920000, 0x00020000, 0 },
	/* OCRAM_PXP (Code) - alias */
	{ 0x00940000, 0x00940000, 0x00008000, 0 },
	/* TCML (Code) */
	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
	/* DDR (Code) - alias, first part of DDR (Data) */
	{ 0x10000000, 0x80000000, 0x0FFF0000, 0 },

	/* TCMU (Data) */
	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
	/* OCRAM (Data) */
	{ 0x20200000, 0x00900000, 0x00020000, 0 },
	/* OCRAM_EPDC (Data) */
	{ 0x20220000, 0x00920000, 0x00020000, 0 },
	/* OCRAM_PXP (Data) */
	{ 0x20240000, 0x00940000, 0x00008000, 0 },
	/* DDR (Data) */
	{ 0x80000000, 0x80000000, 0x60000000, 0 },
};

static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
	/* dev addr , sys addr  , size	    , flags */
	/* TCML (M4 Boot Code) - alias */
	{ 0x00000000, 0x007F8000, 0x00008000, 0 },
	/* OCRAM_S (Code) */
	{ 0x00180000, 0x008F8000, 0x00004000, 0 },
	/* OCRAM_S (Code) - alias */
	{ 0x00180000, 0x008FC000, 0x00004000, 0 },
	/* TCML (Code) */
	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
	/* DDR (Code) - alias, first part of DDR (Data) */
	{ 0x10000000, 0x80000000, 0x0FFF8000, 0 },

	/* TCMU (Data) */
	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
	/* OCRAM_S (Data) - alias? */
	{ 0x208F8000, 0x008F8000, 0x00004000, 0 },
	/* DDR (Data) */
	{ 0x80000000, 0x80000000, 0x60000000, 0 },
};

static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
	.src_reg	= IMX7D_SRC_SCR,
	.src_mask	= IMX7D_M4_RST_MASK,
	.src_start	= IMX7D_M4_START,
	.src_stop	= IMX7D_M4_STOP,
	.att		= imx_rproc_att_imx7d,
	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7d),
};

static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
	.src_reg	= IMX6SX_SRC_SCR,
	.src_mask	= IMX6SX_M4_RST_MASK,
	.src_start	= IMX6SX_M4_START,
	.src_stop	= IMX6SX_M4_STOP,
	.att		= imx_rproc_att_imx6sx,
	.att_size	= ARRAY_SIZE(imx_rproc_att_imx6sx),
};

static int imx_rproc_start(struct rproc *rproc)
{
	struct imx_rproc *priv = rproc->priv;
	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
	struct device *dev = priv->dev;
	int ret;

	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
				 dcfg->src_mask, dcfg->src_start);
	if (ret)
		dev_err(dev, "Filed to enable M4!\n");

	return ret;
}

static int imx_rproc_stop(struct rproc *rproc)
{
	struct imx_rproc *priv = rproc->priv;
	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
	struct device *dev = priv->dev;
	int ret;

	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
				 dcfg->src_mask, dcfg->src_stop);
	if (ret)
		dev_err(dev, "Filed to stop M4!\n");

	return ret;
}

static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
			       int len, u64 *sys)
{
	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
	int i;

	/* parse address translation table */
	for (i = 0; i < dcfg->att_size; i++) {
		const struct imx_rproc_att *att = &dcfg->att[i];

		if (da >= att->da && da + len < att->da + att->size) {
			unsigned int offset = da - att->da;

			*sys = att->sa + offset;
			return 0;
		}
	}

	dev_warn(priv->dev, "Translation filed: da = 0x%llx len = 0x%x\n",
		 da, len);
	return -ENOENT;
}

static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
{
	struct imx_rproc *priv = rproc->priv;
	void *va = NULL;
	u64 sys;
	int i;

	if (len <= 0)
		return NULL;

	/*
	 * On device side we have many aliases, so we need to convert device
	 * address (M4) to system bus address first.
	 */
	if (imx_rproc_da_to_sys(priv, da, len, &sys))
		return NULL;

	for (i = 0; i < IMX7D_RPROC_MEM_MAX; i++) {
		if (sys >= priv->mem[i].sys_addr && sys + len <
		    priv->mem[i].sys_addr +  priv->mem[i].size) {
			unsigned int offset = sys - priv->mem[i].sys_addr;
			/* __force to make sparse happy with type conversion */
			va = (__force void *)(priv->mem[i].cpu_addr + offset);
			break;
		}
	}

	dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va);

	return va;
}

static const struct rproc_ops imx_rproc_ops = {
	.start		= imx_rproc_start,
	.stop		= imx_rproc_stop,
	.da_to_va       = imx_rproc_da_to_va,
};

static int imx_rproc_addr_init(struct imx_rproc *priv,
			       struct platform_device *pdev)
{
	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	int a, b = 0, err, nph;

	/* remap required addresses */
	for (a = 0; a < dcfg->att_size; a++) {
		const struct imx_rproc_att *att = &dcfg->att[a];

		if (!(att->flags & ATT_OWN))
			continue;

		if (b >= IMX7D_RPROC_MEM_MAX)
			break;

		priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev,
						     att->sa, att->size);
		if (!priv->mem[b].cpu_addr) {
			dev_err(dev, "devm_ioremap_resource failed\n");
			return -ENOMEM;
		}
		priv->mem[b].sys_addr = att->sa;
		priv->mem[b].size = att->size;
		b++;
	}

	/* memory-region is optional property */
	nph = of_count_phandle_with_args(np, "memory-region", NULL);
	if (nph <= 0)
		return 0;

	/* remap optional addresses */
	for (a = 0; a < nph; a++) {
		struct device_node *node;
		struct resource res;

		node = of_parse_phandle(np, "memory-region", a);
		err = of_address_to_resource(node, 0, &res);
		if (err) {
			dev_err(dev, "unable to resolve memory region\n");
			return err;
		}

		if (b >= IMX7D_RPROC_MEM_MAX)
			break;

		priv->mem[b].cpu_addr = devm_ioremap_resource(&pdev->dev, &res);
		if (IS_ERR(priv->mem[b].cpu_addr)) {
			dev_err(dev, "devm_ioremap_resource failed\n");
			err = PTR_ERR(priv->mem[b].cpu_addr);
			return err;
		}
		priv->mem[b].sys_addr = res.start;
		priv->mem[b].size = resource_size(&res);
		b++;
	}

	return 0;
}

static int imx_rproc_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	struct imx_rproc *priv;
	struct rproc *rproc;
	struct regmap_config config = { .name = "imx-rproc" };
	const struct imx_rproc_dcfg *dcfg;
	struct regmap *regmap;
	int ret;

	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
	if (IS_ERR(regmap)) {
		dev_err(dev, "failed to find syscon\n");
		return PTR_ERR(regmap);
	}
	regmap_attach_dev(dev, regmap, &config);

	/* set some other name then imx */
	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
			    NULL, sizeof(*priv));
	if (!rproc) {
		ret = -ENOMEM;
		goto err;
	}

	dcfg = of_device_get_match_data(dev);
	if (!dcfg)
		return -EINVAL;

	priv = rproc->priv;
	priv->rproc = rproc;
	priv->regmap = regmap;
	priv->dcfg = dcfg;
	priv->dev = dev;

	dev_set_drvdata(dev, rproc);

	ret = imx_rproc_addr_init(priv, pdev);
	if (ret) {
		dev_err(dev, "filed on imx_rproc_addr_init\n");
		goto err_put_rproc;
	}

	priv->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(priv->clk)) {
		dev_err(dev, "Failed to get clock\n");
		rproc_free(rproc);
		return PTR_ERR(priv->clk);
	}

	/*
	 * clk for M4 block including memory. Should be
	 * enabled before .start for FW transfer.
	 */
	ret = clk_prepare_enable(priv->clk);
	if (ret) {
		dev_err(&rproc->dev, "Failed to enable clock\n");
		rproc_free(rproc);
		return ret;
	}

	ret = rproc_add(rproc);
	if (ret) {
		dev_err(dev, "rproc_add failed\n");
		goto err_put_clk;
	}

	return ret;

err_put_clk:
	clk_disable_unprepare(priv->clk);
err_put_rproc:
	rproc_free(rproc);
err:
	return ret;
}

static int imx_rproc_remove(struct platform_device *pdev)
{
	struct rproc *rproc = platform_get_drvdata(pdev);
	struct imx_rproc *priv = rproc->priv;

	clk_disable_unprepare(priv->clk);
	rproc_del(rproc);
	rproc_free(rproc);

	return 0;
}

static const struct of_device_id imx_rproc_of_match[] = {
	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
	{},
};
MODULE_DEVICE_TABLE(of, imx_rproc_of_match);

static struct platform_driver imx_rproc_driver = {
	.probe = imx_rproc_probe,
	.remove = imx_rproc_remove,
	.driver = {
		.name = "imx-rproc",
		.of_match_table = imx_rproc_of_match,
	},
};

module_platform_driver(imx_rproc_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("IMX6SX/7D remote processor control driver");
MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");
Commit	Line	Data
a0ff4aa6 OR	1	/*
	2	* Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2
	6	* as published by the Free Software Foundation.
	7	*/
	8
	9	#include <linux/clk.h>
	10	#include <linux/err.h>
	11	#include <linux/interrupt.h>
	12	#include <linux/kernel.h>
	13	#include <linux/mfd/syscon.h>
	14	#include <linux/module.h>
	15	#include <linux/of_address.h>
	16	#include <linux/of_device.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/regmap.h>
	19	#include <linux/remoteproc.h>
	20
	21	#define IMX7D_SRC_SCR 0x0C
	22	#define IMX7D_ENABLE_M4 BIT(3)
	23	#define IMX7D_SW_M4P_RST BIT(2)
	24	#define IMX7D_SW_M4C_RST BIT(1)
	25	#define IMX7D_SW_M4C_NON_SCLR_RST BIT(0)
	26
	27	#define IMX7D_M4_RST_MASK (IMX7D_ENABLE_M4 \| IMX7D_SW_M4P_RST \
	28	\| IMX7D_SW_M4C_RST \
	29	\| IMX7D_SW_M4C_NON_SCLR_RST)
	30
	31	#define IMX7D_M4_START (IMX7D_ENABLE_M4 \| IMX7D_SW_M4P_RST \
	32	\| IMX7D_SW_M4C_RST)
	33	#define IMX7D_M4_STOP IMX7D_SW_M4C_NON_SCLR_RST
	34
	35	/* Address: 0x020D8000 */
	36	#define IMX6SX_SRC_SCR 0x00
	37	#define IMX6SX_ENABLE_M4 BIT(22)
	38	#define IMX6SX_SW_M4P_RST BIT(12)
	39	#define IMX6SX_SW_M4C_NON_SCLR_RST BIT(4)
	40	#define IMX6SX_SW_M4C_RST BIT(3)
	41
	42	#define IMX6SX_M4_START (IMX6SX_ENABLE_M4 \| IMX6SX_SW_M4P_RST \
	43	\| IMX6SX_SW_M4C_RST)
	44	#define IMX6SX_M4_STOP IMX6SX_SW_M4C_NON_SCLR_RST
	45	#define IMX6SX_M4_RST_MASK (IMX6SX_ENABLE_M4 \| IMX6SX_SW_M4P_RST \
	46	\| IMX6SX_SW_M4C_NON_SCLR_RST \
	47	\| IMX6SX_SW_M4C_RST)
	48
	49	#define IMX7D_RPROC_MEM_MAX 8
	50
	51	/**
	52	* struct imx_rproc_mem - slim internal memory structure
	53	* @cpu_addr: MPU virtual address of the memory region
	54	* @sys_addr: Bus address used to access the memory region
	55	* @size: Size of the memory region
	56	*/
	57	struct imx_rproc_mem {
	58	void __iomem *cpu_addr;
	59	phys_addr_t sys_addr;
	60	size_t size;
	61	};
	62
	63	/* att flags */
	64	/* M4 own area. Can be mapped at probe */
65	#define ATT_OWN BIT(1)
66
67	/* address translation table */
68	struct imx_rproc_att {
69	u32 da; /* device address (From Cortex M4 view)*/
70	u32 sa; /* system bus address */
71	u32 size; /* size of reg range */
72	int flags;
73	};
74
75	struct imx_rproc_dcfg {
76	u32 src_reg;
77	u32 src_mask;
78	u32 src_start;
79	u32 src_stop;
80	const struct imx_rproc_att *att;
81	size_t att_size;
82	};
83
84	struct imx_rproc {
85	struct device *dev;
86	struct regmap *regmap;
87	struct rproc *rproc;
88	const struct imx_rproc_dcfg *dcfg;
89	struct imx_rproc_mem mem[IMX7D_RPROC_MEM_MAX];
90	struct clk *clk;
91	};
92
93	static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
94	/* dev addr , sys addr , size , flags */
95	/* OCRAM_S (M4 Boot code) - alias */
96	{ 0x00000000, 0x00180000, 0x00008000, 0 },
97	/* OCRAM_S (Code) */
98	{ 0x00180000, 0x00180000, 0x00008000, ATT_OWN },
99	/* OCRAM (Code) - alias */
100	{ 0x00900000, 0x00900000, 0x00020000, 0 },
101	/* OCRAM_EPDC (Code) - alias */
102	{ 0x00920000, 0x00920000, 0x00020000, 0 },
103	/* OCRAM_PXP (Code) - alias */
104	{ 0x00940000, 0x00940000, 0x00008000, 0 },
105	/* TCML (Code) */
106	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
107	/* DDR (Code) - alias, first part of DDR (Data) */
108	{ 0x10000000, 0x80000000, 0x0FFF0000, 0 },
109
110	/* TCMU (Data) */
111	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
112	/* OCRAM (Data) */
113	{ 0x20200000, 0x00900000, 0x00020000, 0 },
114	/* OCRAM_EPDC (Data) */
115	{ 0x20220000, 0x00920000, 0x00020000, 0 },
116	/* OCRAM_PXP (Data) */
117	{ 0x20240000, 0x00940000, 0x00008000, 0 },
118	/* DDR (Data) */
119	{ 0x80000000, 0x80000000, 0x60000000, 0 },
120	};
121
122	static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
123	/* dev addr , sys addr , size , flags */
124	/* TCML (M4 Boot Code) - alias */
125	{ 0x00000000, 0x007F8000, 0x00008000, 0 },
126	/* OCRAM_S (Code) */
127	{ 0x00180000, 0x008F8000, 0x00004000, 0 },
128	/* OCRAM_S (Code) - alias */
129	{ 0x00180000, 0x008FC000, 0x00004000, 0 },
130	/* TCML (Code) */
131	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
132	/* DDR (Code) - alias, first part of DDR (Data) */
133	{ 0x10000000, 0x80000000, 0x0FFF8000, 0 },
134
135	/* TCMU (Data) */
136	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
137	/* OCRAM_S (Data) - alias? */
138	{ 0x208F8000, 0x008F8000, 0x00004000, 0 },
139	/* DDR (Data) */
140	{ 0x80000000, 0x80000000, 0x60000000, 0 },
141	};
142
143	static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
144	.src_reg = IMX7D_SRC_SCR,
145	.src_mask = IMX7D_M4_RST_MASK,
146	.src_start = IMX7D_M4_START,
147	.src_stop = IMX7D_M4_STOP,
148	.att = imx_rproc_att_imx7d,
149	.att_size = ARRAY_SIZE(imx_rproc_att_imx7d),
150	};
151
152	static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
153	.src_reg = IMX6SX_SRC_SCR,
154	.src_mask = IMX6SX_M4_RST_MASK,
155	.src_start = IMX6SX_M4_START,
156	.src_stop = IMX6SX_M4_STOP,
157	.att = imx_rproc_att_imx6sx,
158	.att_size = ARRAY_SIZE(imx_rproc_att_imx6sx),
159	};
160
161	static int imx_rproc_start(struct rproc *rproc)
162	{
163	struct imx_rproc *priv = rproc->priv;
164	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
165	struct device *dev = priv->dev;
166	int ret;
167
168	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
169	dcfg->src_mask, dcfg->src_start);
170	if (ret)
171	dev_err(dev, "Filed to enable M4!\n");
172
173	return ret;
174	}
175
176	static int imx_rproc_stop(struct rproc *rproc)
177	{
178	struct imx_rproc *priv = rproc->priv;
179	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
180	struct device *dev = priv->dev;
181	int ret;
182
183	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
184	dcfg->src_mask, dcfg->src_stop);
185	if (ret)
186	dev_err(dev, "Filed to stop M4!\n");
187
188	return ret;
189	}
190
191	static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
192	int len, u64 *sys)
193	{
194	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
195	int i;
196
197	/* parse address translation table */
198	for (i = 0; i < dcfg->att_size; i++) {
199	const struct imx_rproc_att *att = &dcfg->att[i];
200
201	if (da >= att->da && da + len < att->da + att->size) {
202	unsigned int offset = da - att->da;
203
204	*sys = att->sa + offset;
205	return 0;
206	}
207	}
208
209	dev_warn(priv->dev, "Translation filed: da = 0x%llx len = 0x%x\n",
210	da, len);
211	return -ENOENT;
212	}
213
214	static void imx_rproc_da_to_va(struct rproc rproc, u64 da, int len)
215	{
216	struct imx_rproc *priv = rproc->priv;
217	void *va = NULL;
218	u64 sys;
219	int i;
220
221	if (len <= 0)
222	return NULL;
223
224	/*
225	* On device side we have many aliases, so we need to convert device
226	* address (M4) to system bus address first.
227	*/
228	if (imx_rproc_da_to_sys(priv, da, len, &sys))
229	return NULL;
230
231	for (i = 0; i < IMX7D_RPROC_MEM_MAX; i++) {
232	if (sys >= priv->mem[i].sys_addr && sys + len <
233	priv->mem[i].sys_addr + priv->mem[i].size) {
234	unsigned int offset = sys - priv->mem[i].sys_addr;
235	/* __force to make sparse happy with type conversion */
236	va = (__force void *)(priv->mem[i].cpu_addr + offset);
237	break;
238	}
239	}
240
241	dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va);
242
243	return va;
244	}
245
246	static const struct rproc_ops imx_rproc_ops = {
247	.start = imx_rproc_start,
248	.stop = imx_rproc_stop,
249	.da_to_va = imx_rproc_da_to_va,
250	};
251
252	static int imx_rproc_addr_init(struct imx_rproc *priv,
253	struct platform_device *pdev)
254	{
255	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
256	struct device *dev = &pdev->dev;
257	struct device_node *np = dev->of_node;
258	int a, b = 0, err, nph;
259
260	/* remap required addresses */
261	for (a = 0; a < dcfg->att_size; a++) {
262	const struct imx_rproc_att *att = &dcfg->att[a];
263
264	if (!(att->flags & ATT_OWN))
265	continue;
266
68c2d645	267	if (b >= IMX7D_RPROC_MEM_MAX)
a0ff4aa6 OR	268	break;
	269
	270	priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev,
	271	att->sa, att->size);
68a39a3e	272	if (!priv->mem[b].cpu_addr) {
a0ff4aa6	273	dev_err(dev, "devm_ioremap_resource failed\n");
68a39a3e	274	return -ENOMEM;
a0ff4aa6 OR	275	}
	276	priv->mem[b].sys_addr = att->sa;
	277	priv->mem[b].size = att->size;
	278	b++;
	279	}
	280
	281	/* memory-region is optional property */
	282	nph = of_count_phandle_with_args(np, "memory-region", NULL);
	283	if (nph <= 0)
	284	return 0;
	285
	286	/* remap optional addresses */
	287	for (a = 0; a < nph; a++) {
	288	struct device_node *node;
	289	struct resource res;
	290
	291	node = of_parse_phandle(np, "memory-region", a);
	292	err = of_address_to_resource(node, 0, &res);
	293	if (err) {
	294	dev_err(dev, "unable to resolve memory region\n");
	295	return err;
	296	}
	297
68c2d645	298	if (b >= IMX7D_RPROC_MEM_MAX)
a0ff4aa6 OR	299	break;
	300
	301	priv->mem[b].cpu_addr = devm_ioremap_resource(&pdev->dev, &res);
	302	if (IS_ERR(priv->mem[b].cpu_addr)) {
	303	dev_err(dev, "devm_ioremap_resource failed\n");
	304	err = PTR_ERR(priv->mem[b].cpu_addr);
	305	return err;
	306	}
	307	priv->mem[b].sys_addr = res.start;
	308	priv->mem[b].size = resource_size(&res);
	309	b++;
	310	}
	311
	312	return 0;
	313	}
	314
	315	static int imx_rproc_probe(struct platform_device *pdev)
	316	{
	317	struct device *dev = &pdev->dev;
	318	struct device_node *np = dev->of_node;
	319	struct imx_rproc *priv;
	320	struct rproc *rproc;
	321	struct regmap_config config = { .name = "imx-rproc" };
	322	const struct imx_rproc_dcfg *dcfg;
	323	struct regmap *regmap;
	324	int ret;
	325
	326	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
	327	if (IS_ERR(regmap)) {
	328	dev_err(dev, "failed to find syscon\n");
	329	return PTR_ERR(regmap);
	330	}
	331	regmap_attach_dev(dev, regmap, &config);
	332
	333	/* set some other name then imx */
	334	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
	335	NULL, sizeof(*priv));
	336	if (!rproc) {
	337	ret = -ENOMEM;
	338	goto err;
	339	}
	340
	341	dcfg = of_device_get_match_data(dev);
	342	if (!dcfg)
	343	return -EINVAL;
	344
	345	priv = rproc->priv;
	346	priv->rproc = rproc;
	347	priv->regmap = regmap;
	348	priv->dcfg = dcfg;
	349	priv->dev = dev;
	350
	351	dev_set_drvdata(dev, rproc);
	352
	353	ret = imx_rproc_addr_init(priv, pdev);
	354	if (ret) {
	355	dev_err(dev, "filed on imx_rproc_addr_init\n");
	356	goto err_put_rproc;
	357	}
	358
	359	priv->clk = devm_clk_get(dev, NULL);
	360	if (IS_ERR(priv->clk)) {
	361	dev_err(dev, "Failed to get clock\n");
	362	rproc_free(rproc);
363	return PTR_ERR(priv->clk);
364	}
365
366	/*
367	* clk for M4 block including memory. Should be
368	* enabled before .start for FW transfer.
369	*/
370	ret = clk_prepare_enable(priv->clk);
371	if (ret) {
372	dev_err(&rproc->dev, "Failed to enable clock\n");
373	rproc_free(rproc);
374	return ret;
375	}
376
377	ret = rproc_add(rproc);
378	if (ret) {
379	dev_err(dev, "rproc_add failed\n");
380	goto err_put_clk;
381	}
382
383	return ret;
384
385	err_put_clk:
386	clk_disable_unprepare(priv->clk);
387	err_put_rproc:
388	rproc_free(rproc);
389	err:
390	return ret;
391	}
392
393	static int imx_rproc_remove(struct platform_device *pdev)
394	{
395	struct rproc *rproc = platform_get_drvdata(pdev);
396	struct imx_rproc *priv = rproc->priv;
397
398	clk_disable_unprepare(priv->clk);
399	rproc_del(rproc);
400	rproc_free(rproc);
401
402	return 0;
403	}
404
405	static const struct of_device_id imx_rproc_of_match[] = {
406	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
407	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
408	{},
409	};
410	MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
411
412	static struct platform_driver imx_rproc_driver = {
413	.probe = imx_rproc_probe,
414	.remove = imx_rproc_remove,
415	.driver = {
416	.name = "imx-rproc",
417	.of_match_table = imx_rproc_of_match,
418	},
419	};
420
421	module_platform_driver(imx_rproc_driver);
422
423	MODULE_LICENSE("GPL v2");
424	MODULE_DESCRIPTION("IMX6SX/7D remote processor control driver");
425	MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");