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net: introduce MDIO DM class for MDIO devices

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Adds UCLASS_MDIO DM class supporting MDIO buses that are probed as
stand-alone devices.  Useful in particular for systems that support
DM_ETH and have a stand-alone MDIO hardware block shared by multiple
Ethernet interfaces.

Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Alex Marginean
2019-06-03 19:10:30 +03:00
committed by Joe Hershberger
parent 149468699e
commit c3452b50c3
6 changed files with 184 additions and 0 deletions
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1
include/dm/uclass-id.h
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@@ -58,6 +58,7 @@ enum uclass_id {
UCLASS_LPC, /* x86 'low pin count' interface */
UCLASS_MAILBOX, /* Mailbox controller */
UCLASS_MASS_STORAGE, /* Mass storage device */
UCLASS_MDIO, /* MDIO bus */
UCLASS_MISC, /* Miscellaneous device */
UCLASS_MMC, /* SD / MMC card or chip */
UCLASS_MOD_EXP, /* RSA Mod Exp device */

49
include/miiphy.h
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@@ -118,4 +118,53 @@ int bb_miiphy_write(struct mii_dev *miidev, int addr, int devad, int reg,
#define ESTATUS_1000XF 0x8000
#define ESTATUS_1000XH 0x4000
#ifdef CONFIG_DM_MDIO
/**
* struct mdio_perdev_priv - Per-device class data for MDIO DM
*
* @mii_bus: Supporting MII legacy bus
*/
struct mdio_perdev_priv {
struct mii_dev *mii_bus;
};
/**
* struct mdio_ops - MDIO bus operations
*
* @read: Read from a PHY register
* @write: Write to a PHY register
* @reset: Reset the MDIO bus, NULL if not supported
*/
struct mdio_ops {
int (*read)(struct udevice *mdio_dev, int addr, int devad, int reg);
int (*write)(struct udevice *mdio_dev, int addr, int devad, int reg,
u16 val);
int (*reset)(struct udevice *mdio_dev);
};
#define mdio_get_ops(dev) ((struct mdio_ops *)(dev)->driver->ops)
/**
* dm_mdio_probe_devices - Call probe on all MII devices, currently used for
* MDIO console commands.
*/
void dm_mdio_probe_devices(void);
/**
* dm_mdio_phy_connect - Wrapper over phy_connect for DM MDIO
*
* @dev: mdio dev
* @addr: PHY address on MDIO bus
* @ethdev: ethernet device to connect to the PHY
* @interface: MAC-PHY protocol
*
* @return pointer to phy_device, or 0 on error
*/
struct phy_device *dm_mdio_phy_connect(struct udevice *dev, int addr,
struct udevice *ethdev,
phy_interface_t interface);
#endif
#endif