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116 lines
3.0 KiB
116 lines
3.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/errno.h> |
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#include <linux/mdio.h> |
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#include <linux/module.h> |
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#include <linux/regmap.h> |
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#define REGVAL_MASK GENMASK(15, 0) |
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#define REGNUM_C22_MASK GENMASK(4, 0) |
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/* Clause-45 mask includes the device type (5 bit) and actual register number (16 bit) */ |
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#define REGNUM_C45_MASK GENMASK(20, 0) |
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static int regmap_mdio_read(struct mdio_device *mdio_dev, u32 reg, unsigned int *val) |
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{ |
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int ret; |
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ret = mdiodev_read(mdio_dev, reg); |
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if (ret < 0) |
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return ret; |
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*val = ret & REGVAL_MASK; |
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return 0; |
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} |
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static int regmap_mdio_write(struct mdio_device *mdio_dev, u32 reg, unsigned int val) |
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{ |
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return mdiodev_write(mdio_dev, reg, val); |
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} |
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static int regmap_mdio_c22_read(void *context, unsigned int reg, unsigned int *val) |
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{ |
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struct mdio_device *mdio_dev = context; |
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if (unlikely(reg & ~REGNUM_C22_MASK)) |
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return -ENXIO; |
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return regmap_mdio_read(mdio_dev, reg, val); |
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} |
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static int regmap_mdio_c22_write(void *context, unsigned int reg, unsigned int val) |
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{ |
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struct mdio_device *mdio_dev = context; |
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if (unlikely(reg & ~REGNUM_C22_MASK)) |
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return -ENXIO; |
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return mdiodev_write(mdio_dev, reg, val); |
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} |
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static const struct regmap_bus regmap_mdio_c22_bus = { |
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.reg_write = regmap_mdio_c22_write, |
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.reg_read = regmap_mdio_c22_read, |
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}; |
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static int regmap_mdio_c45_read(void *context, unsigned int reg, unsigned int *val) |
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{ |
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struct mdio_device *mdio_dev = context; |
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if (unlikely(reg & ~REGNUM_C45_MASK)) |
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return -ENXIO; |
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return regmap_mdio_read(mdio_dev, MII_ADDR_C45 | reg, val); |
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} |
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static int regmap_mdio_c45_write(void *context, unsigned int reg, unsigned int val) |
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{ |
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struct mdio_device *mdio_dev = context; |
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if (unlikely(reg & ~REGNUM_C45_MASK)) |
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return -ENXIO; |
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return regmap_mdio_write(mdio_dev, MII_ADDR_C45 | reg, val); |
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} |
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static const struct regmap_bus regmap_mdio_c45_bus = { |
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.reg_write = regmap_mdio_c45_write, |
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.reg_read = regmap_mdio_c45_read, |
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}; |
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struct regmap *__regmap_init_mdio(struct mdio_device *mdio_dev, |
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const struct regmap_config *config, struct lock_class_key *lock_key, |
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const char *lock_name) |
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{ |
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const struct regmap_bus *bus; |
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if (config->reg_bits == 5 && config->val_bits == 16) |
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bus = ®map_mdio_c22_bus; |
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else if (config->reg_bits == 21 && config->val_bits == 16) |
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bus = ®map_mdio_c45_bus; |
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else |
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return ERR_PTR(-EOPNOTSUPP); |
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return __regmap_init(&mdio_dev->dev, bus, mdio_dev, config, lock_key, lock_name); |
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} |
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EXPORT_SYMBOL_GPL(__regmap_init_mdio); |
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struct regmap *__devm_regmap_init_mdio(struct mdio_device *mdio_dev, |
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const struct regmap_config *config, struct lock_class_key *lock_key, |
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const char *lock_name) |
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{ |
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const struct regmap_bus *bus; |
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if (config->reg_bits == 5 && config->val_bits == 16) |
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bus = ®map_mdio_c22_bus; |
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else if (config->reg_bits == 21 && config->val_bits == 16) |
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bus = ®map_mdio_c45_bus; |
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else |
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return ERR_PTR(-EOPNOTSUPP); |
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return __devm_regmap_init(&mdio_dev->dev, bus, mdio_dev, config, lock_key, lock_name); |
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} |
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EXPORT_SYMBOL_GPL(__devm_regmap_init_mdio); |
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MODULE_AUTHOR("Sander Vanheule <[email protected]>"); |
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MODULE_DESCRIPTION("Regmap MDIO Module"); |
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MODULE_LICENSE("GPL v2");
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