24 #include "bus.h"
32 nvkm_i2c_drive_scl(struct nvkm_i2c_bus *bus, int state)  in nvkm_i2c_drive_scl()  argument
34 	bus->func->drive_scl(bus, state);  in nvkm_i2c_drive_scl()
38 nvkm_i2c_drive_sda(struct nvkm_i2c_bus *bus, int state)  in nvkm_i2c_drive_sda()  argument
40 	bus->func->drive_sda(bus, state);  in nvkm_i2c_drive_sda()
44 nvkm_i2c_sense_scl(struct nvkm_i2c_bus *bus)  in nvkm_i2c_sense_scl()  argument
46 	return bus->func->sense_scl(bus);  in nvkm_i2c_sense_scl()
50 nvkm_i2c_sense_sda(struct nvkm_i2c_bus *bus)  in nvkm_i2c_sense_sda()  argument
52 	return bus->func->sense_sda(bus);  in nvkm_i2c_sense_sda()
56 nvkm_i2c_delay(struct nvkm_i2c_bus *bus, u32 nsec)  in nvkm_i2c_delay()  argument
62 nvkm_i2c_raise_scl(struct nvkm_i2c_bus *bus)  in nvkm_i2c_raise_scl()  argument
66 	nvkm_i2c_drive_scl(bus, 1);  in nvkm_i2c_raise_scl()
68 		nvkm_i2c_delay(bus, T_RISEFALL);  in nvkm_i2c_raise_scl()
69 	} while (!nvkm_i2c_sense_scl(bus) && --timeout);  in nvkm_i2c_raise_scl()
75 i2c_start(struct nvkm_i2c_bus *bus)  in i2c_start()  argument
79 	if (!nvkm_i2c_sense_scl(bus) ||  in i2c_start()
80 	    !nvkm_i2c_sense_sda(bus)) {  in i2c_start()
81 		nvkm_i2c_drive_scl(bus, 0);  in i2c_start()
82 		nvkm_i2c_drive_sda(bus, 1);  in i2c_start()
83 		if (!nvkm_i2c_raise_scl(bus))  in i2c_start()
87 	nvkm_i2c_drive_sda(bus, 0);  in i2c_start()
88 	nvkm_i2c_delay(bus, T_HOLD);  in i2c_start()
89 	nvkm_i2c_drive_scl(bus, 0);  in i2c_start()
90 	nvkm_i2c_delay(bus, T_HOLD);  in i2c_start()
95 i2c_stop(struct nvkm_i2c_bus *bus)  in i2c_stop()  argument
97 	nvkm_i2c_drive_scl(bus, 0);  in i2c_stop()
98 	nvkm_i2c_drive_sda(bus, 0);  in i2c_stop()
99 	nvkm_i2c_delay(bus, T_RISEFALL);  in i2c_stop()
101 	nvkm_i2c_drive_scl(bus, 1);  in i2c_stop()
102 	nvkm_i2c_delay(bus, T_HOLD);  in i2c_stop()
103 	nvkm_i2c_drive_sda(bus, 1);  in i2c_stop()
104 	nvkm_i2c_delay(bus, T_HOLD);  in i2c_stop()
108 i2c_bitw(struct nvkm_i2c_bus *bus, int sda)  in i2c_bitw()  argument
110 	nvkm_i2c_drive_sda(bus, sda);  in i2c_bitw()
111 	nvkm_i2c_delay(bus, T_RISEFALL);  in i2c_bitw()
113 	if (!nvkm_i2c_raise_scl(bus))  in i2c_bitw()
115 	nvkm_i2c_delay(bus, T_HOLD);  in i2c_bitw()
117 	nvkm_i2c_drive_scl(bus, 0);  in i2c_bitw()
118 	nvkm_i2c_delay(bus, T_HOLD);  in i2c_bitw()
123 i2c_bitr(struct nvkm_i2c_bus *bus)  in i2c_bitr()  argument
127 	nvkm_i2c_drive_sda(bus, 1);  in i2c_bitr()
128 	nvkm_i2c_delay(bus, T_RISEFALL);  in i2c_bitr()
130 	if (!nvkm_i2c_raise_scl(bus))  in i2c_bitr()
132 	nvkm_i2c_delay(bus, T_HOLD);  in i2c_bitr()
134 	sda = nvkm_i2c_sense_sda(bus);  in i2c_bitr()
136 	nvkm_i2c_drive_scl(bus, 0);  in i2c_bitr()
137 	nvkm_i2c_delay(bus, T_HOLD);  in i2c_bitr()
142 nvkm_i2c_get_byte(struct nvkm_i2c_bus *bus, u8 *byte, bool last)  in nvkm_i2c_get_byte()  argument
148 		bit = i2c_bitr(bus);  in nvkm_i2c_get_byte()
154 	return i2c_bitw(bus, last ? 1 : 0);  in nvkm_i2c_get_byte()
158 nvkm_i2c_put_byte(struct nvkm_i2c_bus *bus, u8 byte)  in nvkm_i2c_put_byte()  argument
162 		ret = i2c_bitw(bus, !!(byte & (1 << i)));  in nvkm_i2c_put_byte()
167 	ret = i2c_bitr(bus);  in nvkm_i2c_put_byte()
174 i2c_addr(struct nvkm_i2c_bus *bus, struct i2c_msg *msg)  in i2c_addr()  argument
179 	return nvkm_i2c_put_byte(bus, addr);  in i2c_addr()
183 nvkm_i2c_bit_xfer(struct nvkm_i2c_bus *bus, struct i2c_msg *msgs, int num)  in nvkm_i2c_bit_xfer()  argument
192 		ret = i2c_start(bus);  in nvkm_i2c_bit_xfer()
194 			ret = i2c_addr(bus, msg);  in nvkm_i2c_bit_xfer()
198 				ret = nvkm_i2c_get_byte(bus, ptr++, !remaining);  in nvkm_i2c_bit_xfer()
201 				ret = nvkm_i2c_put_byte(bus, *ptr++);  in nvkm_i2c_bit_xfer()
207 	i2c_stop(bus);  in nvkm_i2c_bit_xfer()
212 nvkm_i2c_bit_xfer(struct nvkm_i2c_bus *bus, struct i2c_msg *msgs, int num)  in nvkm_i2c_bit_xfer()  argument