[mirror_ubuntu-zesty-kernel.git] / drivers / remoteproc / st_slim_rproc.c

/*
 * SLIM core rproc driver
 *
 * Copyright (C) 2016 STMicroelectronics
 *
 * Author: Peter Griffin <peter.griffin@linaro.org>
 *
 * 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.
 */

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/remoteproc.h>
#include <linux/remoteproc/st_slim_rproc.h>
#include "remoteproc_internal.h"

/* SLIM core registers */
#define SLIM_ID_OFST		0x0
#define SLIM_VER_OFST		0x4

#define SLIM_EN_OFST		0x8
#define SLIM_EN_RUN			BIT(0)

#define SLIM_CLK_GATE_OFST	0xC
#define SLIM_CLK_GATE_DIS		BIT(0)
#define SLIM_CLK_GATE_RESET		BIT(2)

#define SLIM_SLIM_PC_OFST	0x20

/* DMEM registers */
#define SLIM_REV_ID_OFST	0x0
#define SLIM_REV_ID_MIN_MASK		GENMASK(15, 8)
#define SLIM_REV_ID_MIN(id)		((id & SLIM_REV_ID_MIN_MASK) >> 8)
#define SLIM_REV_ID_MAJ_MASK		GENMASK(23, 16)
#define SLIM_REV_ID_MAJ(id)		((id & SLIM_REV_ID_MAJ_MASK) >> 16)


/* peripherals registers */
#define SLIM_STBUS_SYNC_OFST	0xF88
#define SLIM_STBUS_SYNC_DIS		BIT(0)

#define SLIM_INT_SET_OFST	0xFD4
#define SLIM_INT_CLR_OFST	0xFD8
#define SLIM_INT_MASK_OFST	0xFDC

#define SLIM_CMD_CLR_OFST	0xFC8
#define SLIM_CMD_MASK_OFST	0xFCC

static const char *mem_names[ST_SLIM_MEM_MAX] = {
	[ST_SLIM_DMEM]	= "dmem",
	[ST_SLIM_IMEM]	= "imem",
};

static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device *dev)
{
	int clk, err;

	for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
		slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
		if (IS_ERR(slim_rproc->clks[clk])) {
			err = PTR_ERR(slim_rproc->clks[clk]);
			if (err == -EPROBE_DEFER)
				goto err_put_clks;
			slim_rproc->clks[clk] = NULL;
			break;
		}
	}

	return 0;

err_put_clks:
	while (--clk >= 0)
		clk_put(slim_rproc->clks[clk]);

	return err;
}

static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
{
	int clk;

	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
		clk_disable_unprepare(slim_rproc->clks[clk]);
}

static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
{
	int clk, ret;

	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
		ret = clk_prepare_enable(slim_rproc->clks[clk]);
		if (ret)
			goto err_disable_clks;
	}

	return 0;

err_disable_clks:
	while (--clk >= 0)
		clk_disable_unprepare(slim_rproc->clks[clk]);

	return ret;
}

/*
 * Remoteproc slim specific device handlers
 */
static int slim_rproc_start(struct rproc *rproc)
{
	struct device *dev = &rproc->dev;
	struct st_slim_rproc *slim_rproc = rproc->priv;
	unsigned long hw_id, hw_ver, fw_rev;
	u32 val;

	/* disable CPU pipeline clock & reset CPU pipeline */
	val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
	writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

	/* disable SLIM core STBus sync */
	writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);

	/* enable cpu pipeline clock */
	writel(!SLIM_CLK_GATE_DIS,
		slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

	/* clear int & cmd mailbox */
	writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
	writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);

	/* enable all channels cmd & int */
	writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
	writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);

	/* enable cpu */
	writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);

	hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
	hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);

	fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
			SLIM_REV_ID_OFST);

	dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
		 SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
		 hw_id, hw_ver);

	return 0;
}

static int slim_rproc_stop(struct rproc *rproc)
{
	struct st_slim_rproc *slim_rproc = rproc->priv;
	u32 val;

	/* mask all (cmd & int) channels */
	writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
	writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);

	/* disable cpu pipeline clock */
	writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

	writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);

	val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
	if (val & SLIM_EN_RUN)
		dev_warn(&rproc->dev, "Failed to disable SLIM");

	dev_dbg(&rproc->dev, "slim stopped\n");

	return 0;
}

static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
{
	struct st_slim_rproc *slim_rproc = rproc->priv;
	void *va = NULL;
	int i;

	for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
		if (da != slim_rproc->mem[i].bus_addr)
			continue;

		if (len <= slim_rproc->mem[i].size) {
			/* __force to make sparse happy with type conversion */
			va = (__force void *)slim_rproc->mem[i].cpu_addr;
			break;
		}
	}

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

	return va;
}

static struct rproc_ops slim_rproc_ops = {
	.start		= slim_rproc_start,
	.stop		= slim_rproc_stop,
	.da_to_va       = slim_rproc_da_to_va,
};

/*
 * Firmware handler operations: sanity, boot address, load ...
 */

static struct resource_table empty_rsc_tbl = {
	.ver = 1,
	.num = 0,
};

static struct resource_table *slim_rproc_find_rsc_table(struct rproc *rproc,
					       const struct firmware *fw,
					       int *tablesz)
{
	*tablesz = sizeof(empty_rsc_tbl);
	return &empty_rsc_tbl;
}

static struct rproc_fw_ops slim_rproc_fw_ops = {
	.find_rsc_table = slim_rproc_find_rsc_table,
};

/**
 * st_slim_rproc_alloc() - allocate and initialise slim rproc
 * @pdev: Pointer to the platform_device struct
 * @fw_name: Name of firmware for rproc to use
 *
 * Function for allocating and initialising a slim rproc for use by
 * device drivers whose IP is based around the SLIM core. It
 * obtains and enables any clocks required by the SLIM core and also
 * ioremaps the various IO.
 *
 * Returns st_slim_rproc pointer or PTR_ERR() on error.
 */

struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
				char *fw_name)
{
	struct device *dev = &pdev->dev;
	struct st_slim_rproc *slim_rproc;
	struct device_node *np = dev->of_node;
	struct rproc *rproc;
	struct resource *res;
	int err, i;
	const struct rproc_fw_ops *elf_ops;

	if (!fw_name)
		return ERR_PTR(-EINVAL);

	if (!of_device_is_compatible(np, "st,slim-rproc"))
		return ERR_PTR(-EINVAL);

	rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
			fw_name, sizeof(*slim_rproc));
	if (!rproc)
		return ERR_PTR(-ENOMEM);

	rproc->has_iommu = false;

	slim_rproc = rproc->priv;
	slim_rproc->rproc = rproc;

	elf_ops = rproc->fw_ops;
	/* Use some generic elf ops */
	slim_rproc_fw_ops.load = elf_ops->load;
	slim_rproc_fw_ops.sanity_check = elf_ops->sanity_check;

	rproc->fw_ops = &slim_rproc_fw_ops;

	/* get imem and dmem */
	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
						mem_names[i]);

		slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
		if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
			dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
			err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
			goto err;
		}
		slim_rproc->mem[i].bus_addr = res->start;
		slim_rproc->mem[i].size = resource_size(res);
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
	slim_rproc->slimcore = devm_ioremap_resource(dev, res);
	if (IS_ERR(slim_rproc->slimcore)) {
		dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
		err = PTR_ERR(slim_rproc->slimcore);
		goto err;
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
	slim_rproc->peri = devm_ioremap_resource(dev, res);
	if (IS_ERR(slim_rproc->peri)) {
		dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
		err = PTR_ERR(slim_rproc->peri);
		goto err;
	}

	err = slim_clk_get(slim_rproc, dev);
	if (err)
		goto err;

	err = slim_clk_enable(slim_rproc);
	if (err) {
		dev_err(dev, "Failed to enable clocks\n");
		goto err_clk_put;
	}

	/* Register as a remoteproc device */
	err = rproc_add(rproc);
	if (err) {
		dev_err(dev, "registration of slim remoteproc failed\n");
		goto err_clk_dis;
	}

	return slim_rproc;

err_clk_dis:
	slim_clk_disable(slim_rproc);
err_clk_put:
	for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
		clk_put(slim_rproc->clks[i]);
err:
	rproc_free(rproc);
	return ERR_PTR(err);
}
EXPORT_SYMBOL(st_slim_rproc_alloc);

/**
  * st_slim_rproc_put() - put slim rproc resources
  * @slim_rproc: Pointer to the st_slim_rproc struct
  *
  * Function for calling respective _put() functions on slim_rproc resources.
  *
  */
void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
{
	int clk;

	if (!slim_rproc)
		return;

	slim_clk_disable(slim_rproc);

	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
		clk_put(slim_rproc->clks[clk]);

	rproc_del(slim_rproc->rproc);
	rproc_free(slim_rproc->rproc);
}
EXPORT_SYMBOL(st_slim_rproc_put);

MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
bb6869b2 PG	1	/*
	2	* SLIM core rproc driver
	3	*
	4	* Copyright (C) 2016 STMicroelectronics
	5	*
	6	* Author: Peter Griffin <peter.griffin@linaro.org>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*/
	13
	14	#include <linux/clk.h>
	15	#include <linux/err.h>
	16	#include <linux/kernel.h>
	17	#include <linux/module.h>
	18	#include <linux/of.h>
	19	#include <linux/of_device.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/remoteproc.h>
	22	#include <linux/remoteproc/st_slim_rproc.h>
	23	#include "remoteproc_internal.h"
	24
	25	/* SLIM core registers */
	26	#define SLIM_ID_OFST 0x0
	27	#define SLIM_VER_OFST 0x4
	28
	29	#define SLIM_EN_OFST 0x8
	30	#define SLIM_EN_RUN BIT(0)
	31
	32	#define SLIM_CLK_GATE_OFST 0xC
	33	#define SLIM_CLK_GATE_DIS BIT(0)
	34	#define SLIM_CLK_GATE_RESET BIT(2)
	35
	36	#define SLIM_SLIM_PC_OFST 0x20
	37
	38	/* DMEM registers */
	39	#define SLIM_REV_ID_OFST 0x0
	40	#define SLIM_REV_ID_MIN_MASK GENMASK(15, 8)
	41	#define SLIM_REV_ID_MIN(id) ((id & SLIM_REV_ID_MIN_MASK) >> 8)
	42	#define SLIM_REV_ID_MAJ_MASK GENMASK(23, 16)
	43	#define SLIM_REV_ID_MAJ(id) ((id & SLIM_REV_ID_MAJ_MASK) >> 16)
	44
	45
	46	/* peripherals registers */
	47	#define SLIM_STBUS_SYNC_OFST 0xF88
	48	#define SLIM_STBUS_SYNC_DIS BIT(0)
	49
	50	#define SLIM_INT_SET_OFST 0xFD4
	51	#define SLIM_INT_CLR_OFST 0xFD8
	52	#define SLIM_INT_MASK_OFST 0xFDC
	53
	54	#define SLIM_CMD_CLR_OFST 0xFC8
	55	#define SLIM_CMD_MASK_OFST 0xFCC
	56
	57	static const char *mem_names[ST_SLIM_MEM_MAX] = {
	58	[ST_SLIM_DMEM] = "dmem",
	59	[ST_SLIM_IMEM] = "imem",
	60	};
	61
	62	static int slim_clk_get(struct st_slim_rproc slim_rproc, struct device dev)
	63	{
	64	int clk, err;
65
66	for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
67	slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
68	if (IS_ERR(slim_rproc->clks[clk])) {
69	err = PTR_ERR(slim_rproc->clks[clk]);
70	if (err == -EPROBE_DEFER)
71	goto err_put_clks;
72	slim_rproc->clks[clk] = NULL;
73	break;
74	}
75	}
76
77	return 0;
78
79	err_put_clks:
80	while (--clk >= 0)
81	clk_put(slim_rproc->clks[clk]);
82
83	return err;
84	}
85
86	static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
87	{
88	int clk;
89
90	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
91	clk_disable_unprepare(slim_rproc->clks[clk]);
92	}
93
94	static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
95	{
96	int clk, ret;
97
98	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
99	ret = clk_prepare_enable(slim_rproc->clks[clk]);
100	if (ret)
101	goto err_disable_clks;
102	}
103
104	return 0;
105
106	err_disable_clks:
107	while (--clk >= 0)
108	clk_disable_unprepare(slim_rproc->clks[clk]);
109
110	return ret;
111	}
112
113	/*
114	* Remoteproc slim specific device handlers
115	*/
116	static int slim_rproc_start(struct rproc *rproc)
117	{
118	struct device *dev = &rproc->dev;
119	struct st_slim_rproc *slim_rproc = rproc->priv;
120	unsigned long hw_id, hw_ver, fw_rev;
121	u32 val;
122
123	/* disable CPU pipeline clock & reset CPU pipeline */
124	val = SLIM_CLK_GATE_DIS \| SLIM_CLK_GATE_RESET;
125	writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
126
127	/* disable SLIM core STBus sync */
128	writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
129
130	/* enable cpu pipeline clock */
131	writel(!SLIM_CLK_GATE_DIS,
132	slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
133
134	/* clear int & cmd mailbox */
135	writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
136	writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);
137
138	/* enable all channels cmd & int */
139	writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
140	writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);
141
142	/* enable cpu */
143	writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
144
145	hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
146	hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
147
148	fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
149	SLIM_REV_ID_OFST);
150
151	dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
152	SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
153	hw_id, hw_ver);
154
155	return 0;
156	}
157
158	static int slim_rproc_stop(struct rproc *rproc)
159	{
160	struct st_slim_rproc *slim_rproc = rproc->priv;
161	u32 val;
162
163	/* mask all (cmd & int) channels */
164	writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
165	writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
166
167	/* disable cpu pipeline clock */
168	writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
169
170	writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
171
172	val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
173	if (val & SLIM_EN_RUN)
174	dev_warn(&rproc->dev, "Failed to disable SLIM");
175
176	dev_dbg(&rproc->dev, "slim stopped\n");
177
178	return 0;
179	}
180
181	static void slim_rproc_da_to_va(struct rproc rproc, u64 da, int len)
182	{
183	struct st_slim_rproc *slim_rproc = rproc->priv;
184	void *va = NULL;
185	int i;
186
187	for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
188	if (da != slim_rproc->mem[i].bus_addr)
189	continue;
190
191	if (len <= slim_rproc->mem[i].size) {
192	/* __force to make sparse happy with type conversion */
193	va = (__force void *)slim_rproc->mem[i].cpu_addr;
194	break;
195	}
196	}
197
198	dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va);
199
200	return va;
201	}
202
203	static struct rproc_ops slim_rproc_ops = {
204	.start = slim_rproc_start,
205	.stop = slim_rproc_stop,
206	.da_to_va = slim_rproc_da_to_va,
207	};
208
209	/*
210	* Firmware handler operations: sanity, boot address, load ...
211	*/
212
213	static struct resource_table empty_rsc_tbl = {
214	.ver = 1,
215	.num = 0,
216	};
217
218	static struct resource_table slim_rproc_find_rsc_table(struct rproc rproc,
219	const struct firmware *fw,
220	int *tablesz)
221	{
222	*tablesz = sizeof(empty_rsc_tbl);
223	return &empty_rsc_tbl;
224	}
225
226	static struct rproc_fw_ops slim_rproc_fw_ops = {
227	.find_rsc_table = slim_rproc_find_rsc_table,
228	};
229
230	/**
231	* st_slim_rproc_alloc() - allocate and initialise slim rproc
232	* @pdev: Pointer to the platform_device struct
233	* @fw_name: Name of firmware for rproc to use
234	*
235	* Function for allocating and initialising a slim rproc for use by
236	* device drivers whose IP is based around the SLIM core. It
237	* obtains and enables any clocks required by the SLIM core and also
238	* ioremaps the various IO.
239	*
240	* Returns st_slim_rproc pointer or PTR_ERR() on error.
241	*/
242
243	struct st_slim_rproc st_slim_rproc_alloc(struct platform_device pdev,
244	char *fw_name)
245	{
246	struct device *dev = &pdev->dev;
247	struct st_slim_rproc *slim_rproc;
248	struct device_node *np = dev->of_node;
249	struct rproc *rproc;
250	struct resource *res;
251	int err, i;
252	const struct rproc_fw_ops *elf_ops;
253
254	if (!fw_name)
255	return ERR_PTR(-EINVAL);
256
257	if (!of_device_is_compatible(np, "st,slim-rproc"))
258	return ERR_PTR(-EINVAL);
259
260	rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
261	fw_name, sizeof(*slim_rproc));
262	if (!rproc)
263	return ERR_PTR(-ENOMEM);
264
265	rproc->has_iommu = false;
266
267	slim_rproc = rproc->priv;
268	slim_rproc->rproc = rproc;
269
270	elf_ops = rproc->fw_ops;
271	/* Use some generic elf ops */
272	slim_rproc_fw_ops.load = elf_ops->load;
273	slim_rproc_fw_ops.sanity_check = elf_ops->sanity_check;
274
275	rproc->fw_ops = &slim_rproc_fw_ops;
276
277	/* get imem and dmem */
278	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
279	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
280	mem_names[i]);
281
282	slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
283	if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
284	dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
285	err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
286	goto err;
287	}
288	slim_rproc->mem[i].bus_addr = res->start;
289	slim_rproc->mem[i].size = resource_size(res);
290	}
291
292	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
293	slim_rproc->slimcore = devm_ioremap_resource(dev, res);
294	if (IS_ERR(slim_rproc->slimcore)) {
295	dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
296	err = PTR_ERR(slim_rproc->slimcore);
297	goto err;
298	}
299
300	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
301	slim_rproc->peri = devm_ioremap_resource(dev, res);
302	if (IS_ERR(slim_rproc->peri)) {
303	dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
304	err = PTR_ERR(slim_rproc->peri);
305	goto err;
306	}
307
308	err = slim_clk_get(slim_rproc, dev);
309	if (err)
310	goto err;
311
312	err = slim_clk_enable(slim_rproc);
313	if (err) {
314	dev_err(dev, "Failed to enable clocks\n");
315	goto err_clk_put;
316	}
317
318	/* Register as a remoteproc device */
319	err = rproc_add(rproc);
320	if (err) {
321	dev_err(dev, "registration of slim remoteproc failed\n");
322	goto err_clk_dis;
323	}
324
325	return slim_rproc;
326
327	err_clk_dis:
328	slim_clk_disable(slim_rproc);
329	err_clk_put:
330	for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
331	clk_put(slim_rproc->clks[i]);
332	err:
90a80d88	333	rproc_free(rproc);
bb6869b2 PG	334	return ERR_PTR(err);
	335	}
	336	EXPORT_SYMBOL(st_slim_rproc_alloc);
	337
	338	/**
	339	* st_slim_rproc_put() - put slim rproc resources
	340	* @slim_rproc: Pointer to the st_slim_rproc struct
	341	*
	342	* Function for calling respective _put() functions on slim_rproc resources.
	343	*
	344	*/
	345	void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
	346	{
	347	int clk;
	348
	349	if (!slim_rproc)
	350	return;
	351
	352	slim_clk_disable(slim_rproc);
	353
	354	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
	355	clk_put(slim_rproc->clks[clk]);
	356
	357	rproc_del(slim_rproc->rproc);
90a80d88	358	rproc_free(slim_rproc->rproc);
bb6869b2 PG	359	}
	360	EXPORT_SYMBOL(st_slim_rproc_put);
	361
	362	MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
	363	MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
	364	MODULE_LICENSE("GPL v2");