1 // SPDX-License-Identifier: GPL-2.0-only
20 #include <linux/mdio-bitbang.h>
28 	struct mdiobb_ctrl ctrl;  member
35 /* FIXME: If any other users of GPIO crop up, then these will have to
38  * bind the ports to a GPIO driver, and have this be a client of it.
55 static inline void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)  in mdio_dir()  argument
57 	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);  in mdio_dir()
60 		bb_set(bitbang->dir, bitbang->mdio_msk);  in mdio_dir()
62 		bb_clr(bitbang->dir, bitbang->mdio_msk);  in mdio_dir()
65 	in_be32(bitbang->dir);  in mdio_dir()
68 static inline int mdio_read(struct mdiobb_ctrl *ctrl)  in mdio_read()  argument
70 	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);  in mdio_read()
71 	return bb_read(bitbang->dat, bitbang->mdio_msk);  in mdio_read()
74 static inline void mdio(struct mdiobb_ctrl *ctrl, int what)  in mdio()  argument
76 	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);  in mdio()
79 		bb_set(bitbang->dat, bitbang->mdio_msk);  in mdio()
81 		bb_clr(bitbang->dat, bitbang->mdio_msk);  in mdio()
84 	in_be32(bitbang->dat);  in mdio()
87 static inline void mdc(struct mdiobb_ctrl *ctrl, int what)  in mdc()  argument
89 	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);  in mdc()
92 		bb_set(bitbang->dat, bitbang->mdc_msk);  in mdc()
94 		bb_clr(bitbang->dat, bitbang->mdc_msk);  in mdc()
97 	in_be32(bitbang->dat);  in mdc()
113 	struct bb_info *bitbang = bus->priv;  in fs_mii_bitbang_init()
120 		return -ENODEV;  in fs_mii_bitbang_init()
126 	snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);  in fs_mii_bitbang_init()
128 	data = of_get_property(np, "fsl,mdio-pin", &len);  in fs_mii_bitbang_init()
130 		return -ENODEV;  in fs_mii_bitbang_init()
133 	data = of_get_property(np, "fsl,mdc-pin", &len);  in fs_mii_bitbang_init()
135 		return -ENODEV;  in fs_mii_bitbang_init()
138 	bitbang->dir = ioremap(res.start, resource_size(&res));  in fs_mii_bitbang_init()
139 	if (!bitbang->dir)  in fs_mii_bitbang_init()
140 		return -ENOMEM;  in fs_mii_bitbang_init()
142 	bitbang->dat = bitbang->dir + 4;  in fs_mii_bitbang_init()
143 	bitbang->mdio_msk = 1 << (31 - mdio_pin);  in fs_mii_bitbang_init()
144 	bitbang->mdc_msk = 1 << (31 - mdc_pin);  in fs_mii_bitbang_init()
153 	int ret = -ENOMEM;  in fs_enet_mdio_probe()
159 	bitbang->ctrl.ops = &bb_ops;  in fs_enet_mdio_probe()
161 	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);  in fs_enet_mdio_probe()
165 	new_bus->name = "CPM2 Bitbanged MII",  in fs_enet_mdio_probe()
167 	ret = fs_mii_bitbang_init(new_bus, ofdev->dev.of_node);  in fs_enet_mdio_probe()
171 	new_bus->phy_mask = ~0;  in fs_enet_mdio_probe()
173 	new_bus->parent = &ofdev->dev;  in fs_enet_mdio_probe()
176 	ret = of_mdiobus_register(new_bus, ofdev->dev.of_node);  in fs_enet_mdio_probe()
183 	iounmap(bitbang->dir);  in fs_enet_mdio_probe()
195 	struct bb_info *bitbang = bus->priv;  in fs_enet_mdio_remove()
199 	iounmap(bitbang->dir);  in fs_enet_mdio_remove()
205 		.compatible = "fsl,cpm2-mdio-bitbang",
213 		.name = "fsl-bb-mdio",