[linux-2.6-block.git] / drivers / base / regmap / regmap-mdio.c

// SPDX-License-Identifier: GPL-2.0

#include <linux/errno.h>
#include <linux/mdio.h>
#include <linux/module.h>
#include <linux/regmap.h>

#define REGVAL_MASK		GENMASK(15, 0)
#define REGNUM_C22_MASK		GENMASK(4, 0)
/* Clause-45 mask includes the device type (5 bit) and actual register number (16 bit) */
#define REGNUM_C45_MASK		GENMASK(20, 0)

static int regmap_mdio_c22_read(void *context, unsigned int reg, unsigned int *val)
{
	struct mdio_device *mdio_dev = context;
	int ret;

	if (unlikely(reg & ~REGNUM_C22_MASK))
		return -ENXIO;

	ret = mdiodev_read(mdio_dev, reg);
	if (ret < 0)
		return ret;

	*val = ret & REGVAL_MASK;

	return 0;
}

static int regmap_mdio_c22_write(void *context, unsigned int reg, unsigned int val)
{
	struct mdio_device *mdio_dev = context;

	if (unlikely(reg & ~REGNUM_C22_MASK))
		return -ENXIO;

	return mdiodev_write(mdio_dev, reg, val);
}

static const struct regmap_bus regmap_mdio_c22_bus = {
	.reg_write = regmap_mdio_c22_write,
	.reg_read = regmap_mdio_c22_read,
};

static int regmap_mdio_c45_read(void *context, unsigned int reg, unsigned int *val)
{
	struct mdio_device *mdio_dev = context;
	unsigned int devad;
	int ret;

	if (unlikely(reg & ~REGNUM_C45_MASK))
		return -ENXIO;

	devad = reg >> REGMAP_MDIO_C45_DEVAD_SHIFT;
	reg = reg & REGMAP_MDIO_C45_REGNUM_MASK;

	ret = mdiodev_c45_read(mdio_dev, devad, reg);
	if (ret < 0)
		return ret;

	*val = ret & REGVAL_MASK;

	return 0;
}

static int regmap_mdio_c45_write(void *context, unsigned int reg, unsigned int val)
{
	struct mdio_device *mdio_dev = context;
	unsigned int devad;

	if (unlikely(reg & ~REGNUM_C45_MASK))
		return -ENXIO;

	devad = reg >> REGMAP_MDIO_C45_DEVAD_SHIFT;
	reg = reg & REGMAP_MDIO_C45_REGNUM_MASK;

	return mdiodev_c45_write(mdio_dev, devad, reg, val);
}

static const struct regmap_bus regmap_mdio_c45_bus = {
	.reg_write = regmap_mdio_c45_write,
	.reg_read = regmap_mdio_c45_read,
};

struct regmap *__regmap_init_mdio(struct mdio_device *mdio_dev,
	const struct regmap_config *config, struct lock_class_key *lock_key,
	const char *lock_name)
{
	const struct regmap_bus *bus;

	if (config->reg_bits == 5 && config->val_bits == 16)
		bus = &regmap_mdio_c22_bus;
	else if (config->reg_bits == 21 && config->val_bits == 16)
		bus = &regmap_mdio_c45_bus;
	else
		return ERR_PTR(-EOPNOTSUPP);

	return __regmap_init(&mdio_dev->dev, bus, mdio_dev, config, lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__regmap_init_mdio);

struct regmap *__devm_regmap_init_mdio(struct mdio_device *mdio_dev,
	const struct regmap_config *config, struct lock_class_key *lock_key,
	const char *lock_name)
{
	const struct regmap_bus *bus;

	if (config->reg_bits == 5 && config->val_bits == 16)
		bus = &regmap_mdio_c22_bus;
	else if (config->reg_bits == 21 && config->val_bits == 16)
		bus = &regmap_mdio_c45_bus;
	else
		return ERR_PTR(-EOPNOTSUPP);

	return __devm_regmap_init(&mdio_dev->dev, bus, mdio_dev, config, lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__devm_regmap_init_mdio);

MODULE_AUTHOR("Sander Vanheule <sander@svanheule.net>");
MODULE_DESCRIPTION("regmap MDIO Module");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
1f89d2fe SV	1	// SPDX-License-Identifier: GPL-2.0
	2
	3	#include <linux/errno.h>
	4	#include <linux/mdio.h>
	5	#include <linux/module.h>
	6	#include <linux/regmap.h>
	7
dff404de SV	8	#define REGVAL_MASK GENMASK(15, 0)
dff404de SV	9	#define REGNUM_C22_MASK GENMASK(4, 0)
f083be9d SV	10	/* Clause-45 mask includes the device type (5 bit) and actual register number (16 bit) */
f083be9d SV	11	#define REGNUM_C45_MASK GENMASK(20, 0)
dff404de	12
7b3c4c37	13	static int regmap_mdio_c22_read(void context, unsigned int reg, unsigned int val)
1f89d2fe	14	{
7b3c4c37	15	struct mdio_device *mdio_dev = context;
1f89d2fe SV	16	int ret;
1f89d2fe SV	17
7b3c4c37 AL	18	if (unlikely(reg & ~REGNUM_C22_MASK))
	19	return -ENXIO;
	20
65aa371e	21	ret = mdiodev_read(mdio_dev, reg);
e56360d6 AS	22	if (ret < 0)
e56360d6 AS	23	return ret;
1f89d2fe	24
dff404de	25	*val = ret & REGVAL_MASK;
0df02409	26
7b3c4c37	27	return 0;
f083be9d SV	28	}
	29
	30	static int regmap_mdio_c22_write(void *context, unsigned int reg, unsigned int val)
1f89d2fe SV	31	{
	32	struct mdio_device *mdio_dev = context;
	33
0df02409 SV	34	if (unlikely(reg & ~REGNUM_C22_MASK))
	35	return -ENXIO;
	36
65aa371e	37	return mdiodev_write(mdio_dev, reg, val);
1f89d2fe SV	38	}
1f89d2fe SV	39
f083be9d SV	40	static const struct regmap_bus regmap_mdio_c22_bus = {
	41	.reg_write = regmap_mdio_c22_write,
	42	.reg_read = regmap_mdio_c22_read,
	43	};
	44
	45	static int regmap_mdio_c45_read(void context, unsigned int reg, unsigned int val)
	46	{
	47	struct mdio_device *mdio_dev = context;
7b3c4c37 AL	48	unsigned int devad;
7b3c4c37 AL	49	int ret;
f083be9d	50
0df02409 SV	51	if (unlikely(reg & ~REGNUM_C45_MASK))
	52	return -ENXIO;
	53
7b3c4c37 AL	54	devad = reg >> REGMAP_MDIO_C45_DEVAD_SHIFT;
	55	reg = reg & REGMAP_MDIO_C45_REGNUM_MASK;
	56
	57	ret = mdiodev_c45_read(mdio_dev, devad, reg);
	58	if (ret < 0)
	59	return ret;
	60
	61	*val = ret & REGVAL_MASK;
	62
	63	return 0;
f083be9d SV	64	}
	65
	66	static int regmap_mdio_c45_write(void *context, unsigned int reg, unsigned int val)
	67	{
	68	struct mdio_device *mdio_dev = context;
7b3c4c37	69	unsigned int devad;
f083be9d	70
0df02409 SV	71	if (unlikely(reg & ~REGNUM_C45_MASK))
	72	return -ENXIO;
	73
7b3c4c37 AL	74	devad = reg >> REGMAP_MDIO_C45_DEVAD_SHIFT;
	75	reg = reg & REGMAP_MDIO_C45_REGNUM_MASK;
	76
	77	return mdiodev_c45_write(mdio_dev, devad, reg, val);
f083be9d SV	78	}
	79
	80	static const struct regmap_bus regmap_mdio_c45_bus = {
	81	.reg_write = regmap_mdio_c45_write,
	82	.reg_read = regmap_mdio_c45_read,
1f89d2fe SV	83	};
	84
	85	struct regmap __regmap_init_mdio(struct mdio_device mdio_dev,
	86	const struct regmap_config config, struct lock_class_key lock_key,
	87	const char *lock_name)
	88	{
ce62df22	89	const struct regmap_bus *bus;
f083be9d SV	90
	91	if (config->reg_bits == 5 && config->val_bits == 16)
	92	bus = &regmap_mdio_c22_bus;
	93	else if (config->reg_bits == 21 && config->val_bits == 16)
	94	bus = &regmap_mdio_c45_bus;
	95	else
1f89d2fe SV	96	return ERR_PTR(-EOPNOTSUPP);
1f89d2fe SV	97
f083be9d	98	return __regmap_init(&mdio_dev->dev, bus, mdio_dev, config, lock_key, lock_name);
1f89d2fe SV	99	}
	100	EXPORT_SYMBOL_GPL(__regmap_init_mdio);
	101
	102	struct regmap __devm_regmap_init_mdio(struct mdio_device mdio_dev,
	103	const struct regmap_config config, struct lock_class_key lock_key,
	104	const char *lock_name)
	105	{
f083be9d SV	106	const struct regmap_bus *bus;
	107
	108	if (config->reg_bits == 5 && config->val_bits == 16)
	109	bus = &regmap_mdio_c22_bus;
	110	else if (config->reg_bits == 21 && config->val_bits == 16)
	111	bus = &regmap_mdio_c45_bus;
	112	else
1f89d2fe SV	113	return ERR_PTR(-EOPNOTSUPP);
1f89d2fe SV	114
f083be9d	115	return __devm_regmap_init(&mdio_dev->dev, bus, mdio_dev, config, lock_key, lock_name);
1f89d2fe SV	116	}
	117	EXPORT_SYMBOL_GPL(__devm_regmap_init_mdio);
	118
	119	MODULE_AUTHOR("Sander Vanheule <sander@svanheule.net>");
c1ffff88	120	MODULE_DESCRIPTION("regmap MDIO Module");
1f89d2fe	121	MODULE_LICENSE("GPL v2");