34 #define MDC_PIN(bus)	(((struct gpio_priv *)bus->priv)->mdc_pin)  argument
35 #define MDIO_PIN(bus)	(((struct gpio_priv *)bus->priv)->mdio_pin)  argument
37 static inline void mdio_lo(struct mii_bus *bus)  in mdio_lo()  argument
39 	out_le32(gpio_regs+0x10, 1 << MDIO_PIN(bus));  in mdio_lo()
42 static inline void mdio_hi(struct mii_bus *bus)  in mdio_hi()  argument
44 	out_le32(gpio_regs, 1 << MDIO_PIN(bus));  in mdio_hi()
47 static inline void mdc_lo(struct mii_bus *bus)  in mdc_lo()  argument
49 	out_le32(gpio_regs+0x10, 1 << MDC_PIN(bus));  in mdc_lo()
52 static inline void mdc_hi(struct mii_bus *bus)  in mdc_hi()  argument
54 	out_le32(gpio_regs, 1 << MDC_PIN(bus));  in mdc_hi()
57 static inline void mdio_active(struct mii_bus *bus)  in mdio_active()  argument
59 	out_le32(gpio_regs+0x20, (1 << MDC_PIN(bus)) | (1 << MDIO_PIN(bus)));  in mdio_active()
62 static inline void mdio_tristate(struct mii_bus *bus)  in mdio_tristate()  argument
64 	out_le32(gpio_regs+0x30, (1 << MDIO_PIN(bus)));  in mdio_tristate()
67 static inline int mdio_read(struct mii_bus *bus)  in mdio_read()  argument
69 	return !!(in_le32(gpio_regs+0x40) & (1 << MDIO_PIN(bus)));  in mdio_read()
72 static void clock_out(struct mii_bus *bus, int bit)  in clock_out()  argument
75 		mdio_hi(bus);  in clock_out()
77 		mdio_lo(bus);  in clock_out()
79 	mdc_hi(bus);  in clock_out()
81 	mdc_lo(bus);  in clock_out()
85 static void bitbang_pre(struct mii_bus *bus, int read, u8 addr, u8 reg)  in bitbang_pre()  argument
90 	mdio_active(bus);  in bitbang_pre()
92 		clock_out(bus, 1);  in bitbang_pre()
96 	clock_out(bus, 0);  in bitbang_pre()
97 	clock_out(bus, 1);  in bitbang_pre()
99 	clock_out(bus, read);  in bitbang_pre()
100 	clock_out(bus, !read);  in bitbang_pre()
104 		clock_out(bus, (addr & 0x10) != 0);  in bitbang_pre()
110 		clock_out(bus, (reg & 0x10) != 0);  in bitbang_pre()
115 static int gpio_mdio_read(struct mii_bus *bus, int phy_id, int location)  in gpio_mdio_read()  argument
122 	bitbang_pre(bus, 1, addr, reg);  in gpio_mdio_read()
125 	mdio_tristate(bus);  in gpio_mdio_read()
127 	mdc_hi(bus);  in gpio_mdio_read()
129 	mdc_lo(bus);  in gpio_mdio_read()
134 		mdc_lo(bus);  in gpio_mdio_read()
136 		mdc_hi(bus);  in gpio_mdio_read()
138 		mdc_lo(bus);  in gpio_mdio_read()
141 		rdreg |= mdio_read(bus);  in gpio_mdio_read()
144 	mdc_hi(bus);  in gpio_mdio_read()
146 	mdc_lo(bus);  in gpio_mdio_read()
154 static int gpio_mdio_write(struct mii_bus *bus, int phy_id, int location, u16 val)  in gpio_mdio_write()  argument
162 	bitbang_pre(bus, 0, addr, reg);  in gpio_mdio_write()
165 	mdc_lo(bus);  in gpio_mdio_write()
166 	mdio_hi(bus);  in gpio_mdio_write()
168 	mdc_hi(bus);  in gpio_mdio_write()
170 	mdc_lo(bus);  in gpio_mdio_write()
171 	mdio_lo(bus);  in gpio_mdio_write()
173 	mdc_hi(bus);  in gpio_mdio_write()
178 		mdc_lo(bus);  in gpio_mdio_write()
180 			mdio_hi(bus);  in gpio_mdio_write()
182 			mdio_lo(bus);  in gpio_mdio_write()
184 		mdc_hi(bus);  in gpio_mdio_write()
192 	mdio_tristate(bus);  in gpio_mdio_write()
193 	mdc_lo(bus);  in gpio_mdio_write()
195 	mdc_hi(bus);  in gpio_mdio_write()
200 static int gpio_mdio_reset(struct mii_bus *bus)  in gpio_mdio_reset()  argument
226 	new_bus->name = "pasemi gpio mdio bus";  in gpio_mdio_probe()
247 		pr_err("%s: Cannot register as MDIO bus, err %d\n",  in gpio_mdio_probe()
265 	struct mii_bus *bus = dev_get_drvdata(&dev->dev);  in gpio_mdio_remove()  local
267 	mdiobus_unregister(bus);  in gpio_mdio_remove()
271 	kfree(bus->priv);  in gpio_mdio_remove()
272 	bus->priv = NULL;  in gpio_mdio_remove()
273 	mdiobus_free(bus);  in gpio_mdio_remove()