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author | Scott Wood <scottwood@freescale.com> | 2007-10-01 14:20:56 -0500 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:54:03 -0700 |
commit | e2ec4581adf7e288c193e981c39ca01cdb20a272 (patch) | |
tree | 354c0afb64104457d2690e656f2d7ae883ff5722 /include/linux/mdio-bitbang.h | |
parent | 976de6a8c304dcc43e38efcb8a0bace7866b6242 (diff) | |
download | linux-stable-e2ec4581adf7e288c193e981c39ca01cdb20a272.tar.gz linux-stable-e2ec4581adf7e288c193e981c39ca01cdb20a272.tar.bz2 linux-stable-e2ec4581adf7e288c193e981c39ca01cdb20a272.zip |
Generic bitbanged MDIO library
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>
Diffstat (limited to 'include/linux/mdio-bitbang.h')
-rw-r--r-- | include/linux/mdio-bitbang.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/linux/mdio-bitbang.h b/include/linux/mdio-bitbang.h new file mode 100644 index 000000000000..8ea9a42a4c02 --- /dev/null +++ b/include/linux/mdio-bitbang.h @@ -0,0 +1,42 @@ +#ifndef __LINUX_MDIO_BITBANG_H +#define __LINUX_MDIO_BITBANG_H + +#include <linux/phy.h> +#include <linux/module.h> + +struct mdiobb_ctrl; + +struct mdiobb_ops { + struct module *owner; + + /* Set the Management Data Clock high if level is one, + * low if level is zero. + */ + void (*set_mdc)(struct mdiobb_ctrl *ctrl, int level); + + /* Configure the Management Data I/O pin as an input if + * "output" is zero, or an output if "output" is one. + */ + void (*set_mdio_dir)(struct mdiobb_ctrl *ctrl, int output); + + /* Set the Management Data I/O pin high if value is one, + * low if "value" is zero. This may only be called + * when the MDIO pin is configured as an output. + */ + void (*set_mdio_data)(struct mdiobb_ctrl *ctrl, int value); + + /* Retrieve the state Management Data I/O pin. */ + int (*get_mdio_data)(struct mdiobb_ctrl *ctrl); +}; + +struct mdiobb_ctrl { + const struct mdiobb_ops *ops; +}; + +/* The returned bus is not yet registered with the phy layer. */ +struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl); + +/* The bus must already have been unregistered. */ +void free_mdio_bitbang(struct mii_bus *bus); + +#endif |