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