include/linux/mdio-bitbang.h

   1 #ifndef __LINUX_MDIO_BITBANG_H
   2 #define __LINUX_MDIO_BITBANG_H
   3
   4 #include <linux/phy.h>
   5
   6 struct module;
   7
   8 struct mdiobb_ctrl;
   9
  10 struct 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
  33 struct 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. */
  40 struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl);
  41
  42 /* The bus must already have been unregistered. */
  43 void free_mdio_bitbang(struct mii_bus *bus);
  44
  45 #endif