51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_MDIO_BITBANG_H
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#define __LINUX_MDIO_BITBANG_H
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#include <linux/phy.h>
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struct module;
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struct mdiobb_ctrl;
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struct mdiobb_ops {
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struct module *owner;
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/* Set the Management Data Clock high if level is one,
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* low if level is zero.
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*/
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void (*set_mdc)(struct mdiobb_ctrl *ctrl, int level);
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/* Configure the Management Data I/O pin as an input if
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* "output" is zero, or an output if "output" is one.
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*/
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void (*set_mdio_dir)(struct mdiobb_ctrl *ctrl, int output);
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/* Set the Management Data I/O pin high if value is one,
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* low if "value" is zero. This may only be called
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* when the MDIO pin is configured as an output.
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*/
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void (*set_mdio_data)(struct mdiobb_ctrl *ctrl, int value);
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/* Retrieve the state Management Data I/O pin. */
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int (*get_mdio_data)(struct mdiobb_ctrl *ctrl);
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};
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struct mdiobb_ctrl {
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const struct mdiobb_ops *ops;
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unsigned int override_op_c22;
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u8 op_c22_read;
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u8 op_c22_write;
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};
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int mdiobb_read(struct mii_bus *bus, int phy, int reg);
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int mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val);
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/* The returned bus is not yet registered with the phy layer. */
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struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl);
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/* The bus must already have been unregistered. */
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void free_mdio_bitbang(struct mii_bus *bus);
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#endif
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