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
   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