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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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e2ec4581ad
Previously, bitbanged MDIO was only supported in individual hardware-specific drivers. This code factors out the higher level protocol implementation, reducing the hardware-specific portion to functions setting direction, data, and clock. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
#ifndef __LINUX_MDIO_BITBANG_H
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#define __LINUX_MDIO_BITBANG_H
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#include <linux/phy.h>
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#include <linux/module.h>
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struct mdiobb_ctrl;
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struct mdiobb_ops {
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struct module *owner;
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/* Set the Management Data Clock high if level is one,
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* low if level is zero.
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*/
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void (*set_mdc)(struct mdiobb_ctrl *ctrl, int level);
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/* Configure the Management Data I/O pin as an input if
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* "output" is zero, or an output if "output" is one.
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*/
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void (*set_mdio_dir)(struct mdiobb_ctrl *ctrl, int output);
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/* Set the Management Data I/O pin high if value is one,
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* low if "value" is zero. This may only be called
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* when the MDIO pin is configured as an output.
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*/
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void (*set_mdio_data)(struct mdiobb_ctrl *ctrl, int value);
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/* Retrieve the state Management Data I/O pin. */
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int (*get_mdio_data)(struct mdiobb_ctrl *ctrl);
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};
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struct mdiobb_ctrl {
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const struct mdiobb_ops *ops;
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};
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/* The returned bus is not yet registered with the phy layer. */
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struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl);
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/* The bus must already have been unregistered. */
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void free_mdio_bitbang(struct mii_bus *bus);
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#endif
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