1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef __LINUX_MDIO_BITBANG_H |
3 | #define __LINUX_MDIO_BITBANG_H |
4 | |
5 | #include <linux/phy.h> |
6 | |
7 | struct module; |
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; |
36 | unsigned int override_op_c22; |
37 | u8 op_c22_read; |
38 | u8 op_c22_write; |
39 | }; |
40 | |
41 | int mdiobb_read_c22(struct mii_bus *bus, int phy, int reg); |
42 | int mdiobb_write_c22(struct mii_bus *bus, int phy, int reg, u16 val); |
43 | int mdiobb_read_c45(struct mii_bus *bus, int devad, int phy, int reg); |
44 | int mdiobb_write_c45(struct mii_bus *bus, int devad, int phy, int reg, u16 val); |
45 | |
46 | /* The returned bus is not yet registered with the phy layer. */ |
47 | struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl); |
48 | |
49 | /* The bus must already have been unregistered. */ |
50 | void free_mdio_bitbang(struct mii_bus *bus); |
51 | |
52 | #endif |
53 | |