44 static void mdiobb_send_bit(struct mdiobb_ctrl *ctrl, int val)  in mdiobb_send_bit()  argument
46 	const struct mdiobb_ops *ops = ctrl->ops;  in mdiobb_send_bit()
48 	ops->set_mdio_data(ctrl, val);  in mdiobb_send_bit()
50 	ops->set_mdc(ctrl, 1);  in mdiobb_send_bit()
52 	ops->set_mdc(ctrl, 0);  in mdiobb_send_bit()
56 static int mdiobb_get_bit(struct mdiobb_ctrl *ctrl)  in mdiobb_get_bit()  argument
58 	const struct mdiobb_ops *ops = ctrl->ops;  in mdiobb_get_bit()
61 	ops->set_mdc(ctrl, 1);  in mdiobb_get_bit()
63 	ops->set_mdc(ctrl, 0);  in mdiobb_get_bit()
65 	return ops->get_mdio_data(ctrl);  in mdiobb_get_bit()
69 static void mdiobb_send_num(struct mdiobb_ctrl *ctrl, u16 val, int bits)  in mdiobb_send_num()  argument
74 		mdiobb_send_bit(ctrl, (val >> i) & 1);  in mdiobb_send_num()
78 static u16 mdiobb_get_num(struct mdiobb_ctrl *ctrl, int bits)  in mdiobb_get_num()  argument
85 		ret |= mdiobb_get_bit(ctrl);  in mdiobb_get_num()
94 static void mdiobb_cmd(struct mdiobb_ctrl *ctrl, int op, u8 phy, u8 reg)  in mdiobb_cmd()  argument
96 	const struct mdiobb_ops *ops = ctrl->ops;  in mdiobb_cmd()
99 	ops->set_mdio_dir(ctrl, 1);  in mdiobb_cmd()
111 		mdiobb_send_bit(ctrl, 1);  in mdiobb_cmd()
116 	mdiobb_send_bit(ctrl, 0);  in mdiobb_cmd()
118 		mdiobb_send_bit(ctrl, 0);  in mdiobb_cmd()
120 		mdiobb_send_bit(ctrl, 1);  in mdiobb_cmd()
121 	mdiobb_send_bit(ctrl, (op >> 1) & 1);  in mdiobb_cmd()
122 	mdiobb_send_bit(ctrl, (op >> 0) & 1);  in mdiobb_cmd()
124 	mdiobb_send_num(ctrl, phy, 5);  in mdiobb_cmd()
125 	mdiobb_send_num(ctrl, reg, 5);  in mdiobb_cmd()
133 static void mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, int dev_addr,  in mdiobb_cmd_addr()  argument
136 	mdiobb_cmd(ctrl, MDIO_C45_ADDR, phy, dev_addr);  in mdiobb_cmd_addr()
139 	mdiobb_send_bit(ctrl, 1);  in mdiobb_cmd_addr()
140 	mdiobb_send_bit(ctrl, 0);  in mdiobb_cmd_addr()
142 	mdiobb_send_num(ctrl, reg, 16);  in mdiobb_cmd_addr()
144 	ctrl->ops->set_mdio_dir(ctrl, 0);  in mdiobb_cmd_addr()
145 	mdiobb_get_bit(ctrl);  in mdiobb_cmd_addr()
150 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_read_common()  local
153 	ctrl->ops->set_mdio_dir(ctrl, 0);  in mdiobb_read_common()
158 	if (mdiobb_get_bit(ctrl) != 0 &&  in mdiobb_read_common()
164 			mdiobb_get_bit(ctrl);  in mdiobb_read_common()
169 	ret = mdiobb_get_num(ctrl, 16);  in mdiobb_read_common()
170 	mdiobb_get_bit(ctrl);  in mdiobb_read_common()
176 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_read_c22()  local
178 	mdiobb_cmd(ctrl, ctrl->op_c22_read, phy, reg);  in mdiobb_read_c22()
186 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_read_c45()  local
188 	mdiobb_cmd_addr(ctrl, phy, devad, reg);  in mdiobb_read_c45()
189 	mdiobb_cmd(ctrl, MDIO_C45_READ, phy, devad);  in mdiobb_read_c45()
197 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_write_common()  local
200 	mdiobb_send_bit(ctrl, 1);  in mdiobb_write_common()
201 	mdiobb_send_bit(ctrl, 0);  in mdiobb_write_common()
203 	mdiobb_send_num(ctrl, val, 16);  in mdiobb_write_common()
205 	ctrl->ops->set_mdio_dir(ctrl, 0);  in mdiobb_write_common()
206 	mdiobb_get_bit(ctrl);  in mdiobb_write_common()
212 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_write_c22()  local
214 	mdiobb_cmd(ctrl, ctrl->op_c22_write, phy, reg);  in mdiobb_write_c22()
222 	struct mdiobb_ctrl *ctrl = bus->priv;  in mdiobb_write_c45()  local
224 	mdiobb_cmd_addr(ctrl, phy, devad, reg);  in mdiobb_write_c45()
225 	mdiobb_cmd(ctrl, MDIO_C45_WRITE, phy, devad);  in mdiobb_write_c45()
231 struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl)  in alloc_mdio_bitbang()  argument
239 	__module_get(ctrl->ops->owner);  in alloc_mdio_bitbang()
246 	bus->priv = ctrl;  in alloc_mdio_bitbang()
247 	if (!ctrl->override_op_c22) {  in alloc_mdio_bitbang()
248 		ctrl->op_c22_read = MDIO_READ;  in alloc_mdio_bitbang()
249 		ctrl->op_c22_write = MDIO_WRITE;  in alloc_mdio_bitbang()
258 	struct mdiobb_ctrl *ctrl = bus->priv;  in free_mdio_bitbang()  local
260 	module_put(ctrl->ops->owner);  in free_mdio_bitbang()