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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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2 | #ifndef __LINUX_MDIO_BITBANG_H |
3 | #define __LINUX_MDIO_BITBANG_H | |
4 | ||
5 | #include <linux/phy.h> | |
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6 | |
7 | struct module; | |
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8 | |
9 | struct mdiobb_ctrl; | |
10 | ||
11 | struct mdiobb_ops { | |
12 | struct module *owner; | |
13 | ||
14 | /* Set the Management Data Clock high if level is one, | |
15 | * low if level is zero. | |
16 | */ | |
17 | void (*set_mdc)(struct mdiobb_ctrl *ctrl, int level); | |
18 | ||
19 | /* Configure the Management Data I/O pin as an input if | |
20 | * "output" is zero, or an output if "output" is one. | |
21 | */ | |
22 | void (*set_mdio_dir)(struct mdiobb_ctrl *ctrl, int output); | |
23 | ||
24 | /* Set the Management Data I/O pin high if value is one, | |
25 | * low if "value" is zero. This may only be called | |
26 | * when the MDIO pin is configured as an output. | |
27 | */ | |
28 | void (*set_mdio_data)(struct mdiobb_ctrl *ctrl, int value); | |
29 | ||
30 | /* Retrieve the state Management Data I/O pin. */ | |
31 | int (*get_mdio_data)(struct mdiobb_ctrl *ctrl); | |
32 | }; | |
33 | ||
34 | struct mdiobb_ctrl { | |
35 | const struct mdiobb_ops *ops; | |
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36 | /* reset callback */ |
37 | int (*reset)(struct mii_bus *bus); | |
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38 | }; |
39 | ||
40 | /* The returned bus is not yet registered with the phy layer. */ | |
41 | struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl); | |
42 | ||
43 | /* The bus must already have been unregistered. */ | |
44 | void free_mdio_bitbang(struct mii_bus *bus); | |
45 | ||
46 | #endif |