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