linux/include/linux/mdio-bitbang.h
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   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
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