| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __LINUX_MDIO_BITBANG_H |
| #define __LINUX_MDIO_BITBANG_H |
| |
| #include <linux/phy.h> |
| |
| struct module; |
| |
| struct mdiobb_ctrl; |
| |
| struct mdiobb_ops { |
| struct module *owner; |
| |
| /* Set the Management Data Clock high if level is one, |
| * low if level is zero. |
| */ |
| void (*set_mdc)(struct mdiobb_ctrl *ctrl, int level); |
| |
| /* Configure the Management Data I/O pin as an input if |
| * "output" is zero, or an output if "output" is one. |
| */ |
| void (*set_mdio_dir)(struct mdiobb_ctrl *ctrl, int output); |
| |
| /* Set the Management Data I/O pin high if value is one, |
| * low if "value" is zero. This may only be called |
| * when the MDIO pin is configured as an output. |
| */ |
| void (*set_mdio_data)(struct mdiobb_ctrl *ctrl, int value); |
| |
| /* Retrieve the state Management Data I/O pin. */ |
| int (*get_mdio_data)(struct mdiobb_ctrl *ctrl); |
| }; |
| |
| struct mdiobb_ctrl { |
| const struct mdiobb_ops *ops; |
| }; |
| |
| int mdiobb_read(struct mii_bus *bus, int phy, int reg); |
| int mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val); |
| |
| /* The returned bus is not yet registered with the phy layer. */ |
| struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl); |
| |
| /* The bus must already have been unregistered. */ |
| void free_mdio_bitbang(struct mii_bus *bus); |
| |
| #endif |