[linux-block.git] / drivers / remoteproc / imx_rproc.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
 */

#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, "Failed 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, "Failed to stop M4!\n");

	return ret;
}

static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
			       size_t 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 failed: da = 0x%llx len = 0x%zx\n",
		 da, len);
	return -ENOENT;
}

static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, size_t 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%zx 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)
		return -ENOMEM;

	dcfg = of_device_get_match_data(dev);
	if (!dcfg) {
		ret = -EINVAL;
		goto err_put_rproc;
	}

	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, "failed 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");
		ret = PTR_ERR(priv->clk);
		goto err_put_rproc;
	}

	/*
	 * 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");
		goto err_put_rproc;
	}

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

	return 0;

err_put_clk:
	clk_disable_unprepare(priv->clk);
err_put_rproc:
	rproc_free(rproc);

	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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
a0ff4aa6 OR	2	/*
a0ff4aa6 OR	3	* Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
a0ff4aa6 OR	4	*/
	5
	6	#include <linux/clk.h>
	7	#include <linux/err.h>
	8	#include <linux/interrupt.h>
	9	#include <linux/kernel.h>
	10	#include <linux/mfd/syscon.h>
	11	#include <linux/module.h>
	12	#include <linux/of_address.h>
	13	#include <linux/of_device.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/regmap.h>
	16	#include <linux/remoteproc.h>
	17
	18	#define IMX7D_SRC_SCR 0x0C
	19	#define IMX7D_ENABLE_M4 BIT(3)
	20	#define IMX7D_SW_M4P_RST BIT(2)
	21	#define IMX7D_SW_M4C_RST BIT(1)
	22	#define IMX7D_SW_M4C_NON_SCLR_RST BIT(0)
	23
	24	#define IMX7D_M4_RST_MASK (IMX7D_ENABLE_M4 \| IMX7D_SW_M4P_RST \
	25	\| IMX7D_SW_M4C_RST \
	26	\| IMX7D_SW_M4C_NON_SCLR_RST)
	27
	28	#define IMX7D_M4_START (IMX7D_ENABLE_M4 \| IMX7D_SW_M4P_RST \
	29	\| IMX7D_SW_M4C_RST)
	30	#define IMX7D_M4_STOP IMX7D_SW_M4C_NON_SCLR_RST
	31
	32	/* Address: 0x020D8000 */
	33	#define IMX6SX_SRC_SCR 0x00
	34	#define IMX6SX_ENABLE_M4 BIT(22)
	35	#define IMX6SX_SW_M4P_RST BIT(12)
	36	#define IMX6SX_SW_M4C_NON_SCLR_RST BIT(4)
	37	#define IMX6SX_SW_M4C_RST BIT(3)
	38
	39	#define IMX6SX_M4_START (IMX6SX_ENABLE_M4 \| IMX6SX_SW_M4P_RST \
	40	\| IMX6SX_SW_M4C_RST)
	41	#define IMX6SX_M4_STOP IMX6SX_SW_M4C_NON_SCLR_RST
	42	#define IMX6SX_M4_RST_MASK (IMX6SX_ENABLE_M4 \| IMX6SX_SW_M4P_RST \
	43	\| IMX6SX_SW_M4C_NON_SCLR_RST \
	44	\| IMX6SX_SW_M4C_RST)
	45
	46	#define IMX7D_RPROC_MEM_MAX 8
	47
	48	/**
	49	* struct imx_rproc_mem - slim internal memory structure
	50	* @cpu_addr: MPU virtual address of the memory region
	51	* @sys_addr: Bus address used to access the memory region
	52	* @size: Size of the memory region
	53	*/
	54	struct imx_rproc_mem {
	55	void __iomem *cpu_addr;
	56	phys_addr_t sys_addr;
	57	size_t size;
	58	};
	59
	60	/* att flags */
	61	/* M4 own area. Can be mapped at probe */
	62	#define ATT_OWN BIT(1)
	63
	64	/* address translation table */
	65	struct imx_rproc_att {
	66	u32 da; /* device address (From Cortex M4 view)*/
	67	u32 sa; /* system bus address */
68	u32 size; /* size of reg range */
69	int flags;
70	};
71
72	struct imx_rproc_dcfg {
73	u32 src_reg;
74	u32 src_mask;
75	u32 src_start;
76	u32 src_stop;
77	const struct imx_rproc_att *att;
78	size_t att_size;
79	};
80
81	struct imx_rproc {
82	struct device *dev;
83	struct regmap *regmap;
84	struct rproc *rproc;
85	const struct imx_rproc_dcfg *dcfg;
86	struct imx_rproc_mem mem[IMX7D_RPROC_MEM_MAX];
87	struct clk *clk;
88	};
89
90	static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
91	/* dev addr , sys addr , size , flags */
92	/* OCRAM_S (M4 Boot code) - alias */
93	{ 0x00000000, 0x00180000, 0x00008000, 0 },
94	/* OCRAM_S (Code) */
95	{ 0x00180000, 0x00180000, 0x00008000, ATT_OWN },
96	/* OCRAM (Code) - alias */
97	{ 0x00900000, 0x00900000, 0x00020000, 0 },
98	/* OCRAM_EPDC (Code) - alias */
99	{ 0x00920000, 0x00920000, 0x00020000, 0 },
100	/* OCRAM_PXP (Code) - alias */
101	{ 0x00940000, 0x00940000, 0x00008000, 0 },
102	/* TCML (Code) */
103	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
104	/* DDR (Code) - alias, first part of DDR (Data) */
105	{ 0x10000000, 0x80000000, 0x0FFF0000, 0 },
106
107	/* TCMU (Data) */
108	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
109	/* OCRAM (Data) */
110	{ 0x20200000, 0x00900000, 0x00020000, 0 },
111	/* OCRAM_EPDC (Data) */
112	{ 0x20220000, 0x00920000, 0x00020000, 0 },
113	/* OCRAM_PXP (Data) */
114	{ 0x20240000, 0x00940000, 0x00008000, 0 },
115	/* DDR (Data) */
116	{ 0x80000000, 0x80000000, 0x60000000, 0 },
117	};
118
119	static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
120	/* dev addr , sys addr , size , flags */
121	/* TCML (M4 Boot Code) - alias */
122	{ 0x00000000, 0x007F8000, 0x00008000, 0 },
123	/* OCRAM_S (Code) */
124	{ 0x00180000, 0x008F8000, 0x00004000, 0 },
125	/* OCRAM_S (Code) - alias */
126	{ 0x00180000, 0x008FC000, 0x00004000, 0 },
127	/* TCML (Code) */
128	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
129	/* DDR (Code) - alias, first part of DDR (Data) */
130	{ 0x10000000, 0x80000000, 0x0FFF8000, 0 },
131
132	/* TCMU (Data) */
133	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
134	/* OCRAM_S (Data) - alias? */
135	{ 0x208F8000, 0x008F8000, 0x00004000, 0 },
136	/* DDR (Data) */
137	{ 0x80000000, 0x80000000, 0x60000000, 0 },
138	};
139
140	static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
141	.src_reg = IMX7D_SRC_SCR,
142	.src_mask = IMX7D_M4_RST_MASK,
143	.src_start = IMX7D_M4_START,
144	.src_stop = IMX7D_M4_STOP,
145	.att = imx_rproc_att_imx7d,
146	.att_size = ARRAY_SIZE(imx_rproc_att_imx7d),
147	};
148
149	static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
150	.src_reg = IMX6SX_SRC_SCR,
151	.src_mask = IMX6SX_M4_RST_MASK,
152	.src_start = IMX6SX_M4_START,
153	.src_stop = IMX6SX_M4_STOP,
154	.att = imx_rproc_att_imx6sx,
155	.att_size = ARRAY_SIZE(imx_rproc_att_imx6sx),
156	};
157
158	static int imx_rproc_start(struct rproc *rproc)
159	{
160	struct imx_rproc *priv = rproc->priv;
161	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
162	struct device *dev = priv->dev;
163	int ret;
164
165	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
166	dcfg->src_mask, dcfg->src_start);
167	if (ret)
16a3c637	168	dev_err(dev, "Failed to enable M4!\n");
a0ff4aa6 OR	169
	170	return ret;
	171	}
	172
	173	static int imx_rproc_stop(struct rproc *rproc)
	174	{
	175	struct imx_rproc *priv = rproc->priv;
	176	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
	177	struct device *dev = priv->dev;
	178	int ret;
	179
	180	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
	181	dcfg->src_mask, dcfg->src_stop);
	182	if (ret)
16a3c637	183	dev_err(dev, "Failed to stop M4!\n");
a0ff4aa6 OR	184
	185	return ret;
	186	}
	187
	188	static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
9ce3bf22	189	size_t len, u64 *sys)
a0ff4aa6 OR	190	{
	191	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
	192	int i;
	193
	194	/* parse address translation table */
	195	for (i = 0; i < dcfg->att_size; i++) {
	196	const struct imx_rproc_att *att = &dcfg->att[i];
	197
	198	if (da >= att->da && da + len < att->da + att->size) {
	199	unsigned int offset = da - att->da;
	200
	201	*sys = att->sa + offset;
	202	return 0;
	203	}
	204	}
	205
9ce3bf22	206	dev_warn(priv->dev, "Translation failed: da = 0x%llx len = 0x%zx\n",
a0ff4aa6 OR	207	da, len);
	208	return -ENOENT;
	209	}
	210
9ce3bf22	211	static void imx_rproc_da_to_va(struct rproc rproc, u64 da, size_t len)
a0ff4aa6 OR	212	{
	213	struct imx_rproc *priv = rproc->priv;
	214	void *va = NULL;
	215	u64 sys;
	216	int i;
	217
9ce3bf22	218	if (len == 0)
a0ff4aa6 OR	219	return NULL;
	220
	221	/*
	222	* On device side we have many aliases, so we need to convert device
	223	* address (M4) to system bus address first.
	224	*/
	225	if (imx_rproc_da_to_sys(priv, da, len, &sys))
	226	return NULL;
	227
	228	for (i = 0; i < IMX7D_RPROC_MEM_MAX; i++) {
	229	if (sys >= priv->mem[i].sys_addr && sys + len <
	230	priv->mem[i].sys_addr + priv->mem[i].size) {
	231	unsigned int offset = sys - priv->mem[i].sys_addr;
	232	/* __force to make sparse happy with type conversion */
	233	va = (__force void *)(priv->mem[i].cpu_addr + offset);
	234	break;
	235	}
	236	}
	237
9ce3bf22 CL	238	dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%zx va = 0x%p\n",
9ce3bf22 CL	239	da, len, va);
a0ff4aa6 OR	240
	241	return va;
	242	}
	243
	244	static const struct rproc_ops imx_rproc_ops = {
	245	.start = imx_rproc_start,
	246	.stop = imx_rproc_stop,
	247	.da_to_va = imx_rproc_da_to_va,
	248	};
	249
	250	static int imx_rproc_addr_init(struct imx_rproc *priv,
	251	struct platform_device *pdev)
	252	{
	253	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
	254	struct device *dev = &pdev->dev;
	255	struct device_node *np = dev->of_node;
	256	int a, b = 0, err, nph;
	257
	258	/* remap required addresses */
	259	for (a = 0; a < dcfg->att_size; a++) {
	260	const struct imx_rproc_att *att = &dcfg->att[a];
	261
	262	if (!(att->flags & ATT_OWN))
	263	continue;
	264
68c2d645	265	if (b >= IMX7D_RPROC_MEM_MAX)
a0ff4aa6 OR	266	break;
	267
	268	priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev,
	269	att->sa, att->size);
68a39a3e	270	if (!priv->mem[b].cpu_addr) {
a0ff4aa6	271	dev_err(dev, "devm_ioremap_resource failed\n");
68a39a3e	272	return -ENOMEM;
a0ff4aa6 OR	273	}
	274	priv->mem[b].sys_addr = att->sa;
	275	priv->mem[b].size = att->size;
	276	b++;
	277	}
	278
	279	/* memory-region is optional property */
	280	nph = of_count_phandle_with_args(np, "memory-region", NULL);
	281	if (nph <= 0)
	282	return 0;
	283
	284	/* remap optional addresses */
	285	for (a = 0; a < nph; a++) {
	286	struct device_node *node;
	287	struct resource res;
	288
	289	node = of_parse_phandle(np, "memory-region", a);
	290	err = of_address_to_resource(node, 0, &res);
	291	if (err) {
	292	dev_err(dev, "unable to resolve memory region\n");
	293	return err;
	294	}
	295
68c2d645	296	if (b >= IMX7D_RPROC_MEM_MAX)
a0ff4aa6 OR	297	break;
	298
	299	priv->mem[b].cpu_addr = devm_ioremap_resource(&pdev->dev, &res);
	300	if (IS_ERR(priv->mem[b].cpu_addr)) {
	301	dev_err(dev, "devm_ioremap_resource failed\n");
	302	err = PTR_ERR(priv->mem[b].cpu_addr);
	303	return err;
	304	}
	305	priv->mem[b].sys_addr = res.start;
	306	priv->mem[b].size = resource_size(&res);
	307	b++;
	308	}
	309
	310	return 0;
	311	}
	312
	313	static int imx_rproc_probe(struct platform_device *pdev)
	314	{
	315	struct device *dev = &pdev->dev;
	316	struct device_node *np = dev->of_node;
	317	struct imx_rproc *priv;
	318	struct rproc *rproc;
	319	struct regmap_config config = { .name = "imx-rproc" };
	320	const struct imx_rproc_dcfg *dcfg;
	321	struct regmap *regmap;
	322	int ret;
	323
	324	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
	325	if (IS_ERR(regmap)) {
	326	dev_err(dev, "failed to find syscon\n");
	327	return PTR_ERR(regmap);
	328	}
	329	regmap_attach_dev(dev, regmap, &config);
	330
	331	/* set some other name then imx */
	332	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
	333	NULL, sizeof(*priv));
99a31adf CJ	334	if (!rproc)
99a31adf CJ	335	return -ENOMEM;
a0ff4aa6 OR	336
a0ff4aa6 OR	337	dcfg = of_device_get_match_data(dev);
de6f83f8 CJ	338	if (!dcfg) {
	339	ret = -EINVAL;
	340	goto err_put_rproc;
	341	}
a0ff4aa6 OR	342
	343	priv = rproc->priv;
	344	priv->rproc = rproc;
	345	priv->regmap = regmap;
	346	priv->dcfg = dcfg;
	347	priv->dev = dev;
	348
	349	dev_set_drvdata(dev, rproc);
	350
	351	ret = imx_rproc_addr_init(priv, pdev);
	352	if (ret) {
16a3c637	353	dev_err(dev, "failed on imx_rproc_addr_init\n");
a0ff4aa6 OR	354	goto err_put_rproc;
	355	}
	356
	357	priv->clk = devm_clk_get(dev, NULL);
	358	if (IS_ERR(priv->clk)) {
	359	dev_err(dev, "Failed to get clock\n");
96a30d7f CJ	360	ret = PTR_ERR(priv->clk);
96a30d7f CJ	361	goto err_put_rproc;
a0ff4aa6 OR	362	}
	363
	364	/*
	365	* clk for M4 block including memory. Should be
	366	* enabled before .start for FW transfer.
	367	*/
	368	ret = clk_prepare_enable(priv->clk);
	369	if (ret) {
	370	dev_err(&rproc->dev, "Failed to enable clock\n");
96a30d7f	371	goto err_put_rproc;
a0ff4aa6 OR	372	}
	373
	374	ret = rproc_add(rproc);
	375	if (ret) {
	376	dev_err(dev, "rproc_add failed\n");
	377	goto err_put_clk;
	378	}
	379
99a31adf	380	return 0;
a0ff4aa6 OR	381
	382	err_put_clk:
	383	clk_disable_unprepare(priv->clk);
	384	err_put_rproc:
	385	rproc_free(rproc);
99a31adf	386
a0ff4aa6 OR	387	return ret;
	388	}
	389
	390	static int imx_rproc_remove(struct platform_device *pdev)
	391	{
	392	struct rproc *rproc = platform_get_drvdata(pdev);
	393	struct imx_rproc *priv = rproc->priv;
	394
	395	clk_disable_unprepare(priv->clk);
	396	rproc_del(rproc);
	397	rproc_free(rproc);
	398
	399	return 0;
	400	}
	401
	402	static const struct of_device_id imx_rproc_of_match[] = {
	403	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
	404	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
	405	{},
	406	};
	407	MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
	408
	409	static struct platform_driver imx_rproc_driver = {
	410	.probe = imx_rproc_probe,
	411	.remove = imx_rproc_remove,
	412	.driver = {
	413	.name = "imx-rproc",
	414	.of_match_table = imx_rproc_of_match,
	415	},
	416	};
	417
	418	module_platform_driver(imx_rproc_driver);
	419
	420	MODULE_LICENSE("GPL v2");
	421	MODULE_DESCRIPTION("IMX6SX/7D remote processor control driver");
	422	MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");