LXR linux/include/linux/mdio-bitbang.h

   1#ifndef __LINUX_MDIO_BITBANG_H
   2#define __LINUX_MDIO_BITBANG_H
   3
   4#include <linux/phy.h>
   5#include <linux/module.h>
   6
   7struct mdiobb_ctrl;
   8
   9struct 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
  32struct mdiobb_ctrl {
  33        const struct mdiobb_ops *ops;
  34};
  35
  36/* The returned bus is not yet registered with the phy layer. */
  37struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl);
  38
  39/* The bus must already have been unregistered. */
  40void free_mdio_bitbang(struct mii_bus *bus);
  41
  42#endif
  43