| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef __LINUX_MDIO_BITBANG_H |
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| 3 | #define __LINUX_MDIO_BITBANG_H |
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| 4 | |
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| 5 | #include <linux/phy.h> |
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| 6 | |
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| 7 | struct module; |
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| 8 | |
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| 9 | struct mdiobb_ctrl; |
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| 10 | |
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| 11 | struct mdiobb_ops { |
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| 12 | struct module *owner; |
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| 13 | |
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| 14 | /* Set the Management Data Clock high if level is one, |
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| 15 | * low if level is zero. |
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| 16 | */ |
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| 17 | void (*set_mdc)(struct mdiobb_ctrl *ctrl, int level); |
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| 18 | |
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| 19 | /* Configure the Management Data I/O pin as an input if |
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| 20 | * "output" is zero, or an output if "output" is one. |
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| 21 | */ |
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| 22 | void (*set_mdio_dir)(struct mdiobb_ctrl *ctrl, int output); |
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| 23 | |
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| 24 | /* Set the Management Data I/O pin high if value is one, |
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| 25 | * low if "value" is zero. This may only be called |
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| 26 | * when the MDIO pin is configured as an output. |
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| 27 | */ |
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| 28 | void (*set_mdio_data)(struct mdiobb_ctrl *ctrl, int value); |
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| 29 | |
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| 30 | /* Retrieve the state Management Data I/O pin. */ |
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| 31 | int (*get_mdio_data)(struct mdiobb_ctrl *ctrl); |
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| 32 | }; |
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| 33 | |
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| 34 | struct mdiobb_ctrl { |
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| 35 | const struct mdiobb_ops *ops; |
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| 36 | unsigned int override_op_c22; |
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| 37 | u8 op_c22_read; |
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| 38 | u8 op_c22_write; |
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| 39 | }; |
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| 40 | |
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| 41 | int mdiobb_read_c22(struct mii_bus *bus, int phy, int reg); |
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| 42 | int mdiobb_write_c22(struct mii_bus *bus, int phy, int reg, u16 val); |
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| 43 | int mdiobb_read_c45(struct mii_bus *bus, int devad, int phy, int reg); |
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| 44 | int mdiobb_write_c45(struct mii_bus *bus, int devad, int phy, int reg, u16 val); |
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| 45 | |
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| 46 | /* The returned bus is not yet registered with the phy layer. */ |
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| 47 | struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl); |
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| 48 | |
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| 49 | /* The bus must already have been unregistered. */ |
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| 50 | void free_mdio_bitbang(struct mii_bus *bus); |
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| 51 | |
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| 52 | #endif |
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| 53 | |
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