47 static void mdiobb_send_bit(struct mdiobb_ctrl *ctrl, int val)  in mdiobb_send_bit()  argument
49 	const struct mdiobb_ops *ops = ctrl->ops;  in mdiobb_send_bit()
51 	ops->set_mdio_data(ctrl, val);  in mdiobb_send_bit()
53 	ops->set_mdc(ctrl, 1);  in mdiobb_send_bit()
55 	ops->set_mdc(ctrl, 0);  in mdiobb_send_bit()
59 static int mdiobb_get_bit(struct mdiobb_ctrl *ctrl)  in mdiobb_get_bit()  argument
61 	const struct mdiobb_ops *ops = ctrl->ops;  in mdiobb_get_bit()
64 	ops->set_mdc(ctrl, 1);  in mdiobb_get_bit()
66 	ops->set_mdc(ctrl, 0);  in mdiobb_get_bit()
68 	return ops->get_mdio_data(ctrl);  in mdiobb_get_bit()
72 static void mdiobb_send_num(struct mdiobb_ctrl *ctrl, u16 val, int bits)  in mdiobb_send_num()  argument
77 		mdiobb_send_bit(ctrl, (val >> i) & 1);  in mdiobb_send_num()
81 static u16 mdiobb_get_num(struct mdiobb_ctrl *ctrl, int bits)  in mdiobb_get_num()  argument
88 		ret |= mdiobb_get_bit(ctrl);  in mdiobb_get_num()
97 static void mdiobb_cmd(struct mdiobb_ctrl *ctrl, int op, u8 phy, u8 reg)  in mdiobb_cmd()  argument
99 	const struct mdiobb_ops *ops = ctrl->ops;  in mdiobb_cmd()
102 	ops->set_mdio_dir(ctrl, 1);  in mdiobb_cmd()
114 		mdiobb_send_bit(ctrl, 1);  in mdiobb_cmd()
119 	mdiobb_send_bit(ctrl, 0);  in mdiobb_cmd()
121 		mdiobb_send_bit(ctrl, 0);  in mdiobb_cmd()
123 		mdiobb_send_bit(ctrl, 1);  in mdiobb_cmd()
124 	mdiobb_send_bit(ctrl, (op >> 1) & 1);  in mdiobb_cmd()
125 	mdiobb_send_bit(ctrl, (op >> 0) & 1);  in mdiobb_cmd()
127 	mdiobb_send_num(ctrl, phy, 5);  in mdiobb_cmd()
128 	mdiobb_send_num(ctrl, reg, 5);  in mdiobb_cmd()
137 static int mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, u32 addr)  in mdiobb_cmd_addr()  argument
141 	mdiobb_cmd(ctrl, MDIO_C45_ADDR, phy, dev_addr);  in mdiobb_cmd_addr()
144 	mdiobb_send_bit(ctrl, 1);  in mdiobb_cmd_addr()
145 	mdiobb_send_bit(ctrl, 0);  in mdiobb_cmd_addr()
147 	mdiobb_send_num(ctrl, reg, 16);  in mdiobb_cmd_addr()
149 	ctrl->ops->set_mdio_dir(ctrl, 0);  in mdiobb_cmd_addr()
150 	mdiobb_get_bit(ctrl);  in mdiobb_cmd_addr()
157 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_read()  local
161 		reg = mdiobb_cmd_addr(ctrl, phy, reg);  in mdiobb_read()
162 		mdiobb_cmd(ctrl, MDIO_C45_READ, phy, reg);  in mdiobb_read()
164 		mdiobb_cmd(ctrl, MDIO_READ, phy, reg);  in mdiobb_read()
166 	ctrl->ops->set_mdio_dir(ctrl, 0);  in mdiobb_read()
171 	if (mdiobb_get_bit(ctrl) != 0 &&  in mdiobb_read()
177 			mdiobb_get_bit(ctrl);  in mdiobb_read()
182 	ret = mdiobb_get_num(ctrl, 16);  in mdiobb_read()
183 	mdiobb_get_bit(ctrl);  in mdiobb_read()
189 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_write()  local
192 		reg = mdiobb_cmd_addr(ctrl, phy, reg);  in mdiobb_write()
193 		mdiobb_cmd(ctrl, MDIO_C45_WRITE, phy, reg);  in mdiobb_write()
195 		mdiobb_cmd(ctrl, MDIO_WRITE, phy, reg);  in mdiobb_write()
198 	mdiobb_send_bit(ctrl, 1);  in mdiobb_write()
199 	mdiobb_send_bit(ctrl, 0);  in mdiobb_write()
201 	mdiobb_send_num(ctrl, val, 16);  in mdiobb_write()
203 	ctrl->ops->set_mdio_dir(ctrl, 0);  in mdiobb_write()
204 	mdiobb_get_bit(ctrl);  in mdiobb_write()
210 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_reset()  local
211 	if (ctrl->reset)  in mdiobb_reset()
212 		ctrl->reset(bus);  in mdiobb_reset()
216 struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl)  in alloc_mdio_bitbang()  argument
224 	__module_get(ctrl->ops->owner);  in alloc_mdio_bitbang()
229 	bus->priv = ctrl;  in alloc_mdio_bitbang()
237 	struct mdiobb_ctrl *ctrl = bus->priv;  in free_mdio_bitbang()  local
239 	module_put(ctrl->ops->owner);  in free_mdio_bitbang()