137 static uint8_t i2c_imx_get_clk(struct mxc_i2c_bus *i2c_bus, unsigned int rate)  in i2c_imx_get_clk()  argument
170 static int bus_i2c_set_bus_speed(struct mxc_i2c_bus *i2c_bus, int speed)  in bus_i2c_set_bus_speed()  argument
172 	ulong base = i2c_bus->base;  in bus_i2c_set_bus_speed()
173 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in bus_i2c_set_bus_speed()
174 	u8 clk_idx = i2c_imx_get_clk(i2c_bus, speed);  in bus_i2c_set_bus_speed()
194 static int wait_for_sr_state(struct mxc_i2c_bus *i2c_bus, unsigned state)  in wait_for_sr_state()  argument
198 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in wait_for_sr_state()
200 	ulong base = i2c_bus->base;  in wait_for_sr_state()
228 static int tx_byte(struct mxc_i2c_bus *i2c_bus, u8 byte)  in tx_byte()  argument
231 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in tx_byte()
233 	ulong base = i2c_bus->base;  in tx_byte()
238 	ret = wait_for_sr_state(i2c_bus, ST_IIF);  in tx_byte()
258 static void i2c_imx_stop(struct mxc_i2c_bus *i2c_bus)  in i2c_imx_stop()  argument
261 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_imx_stop()
263 	ulong base = i2c_bus->base;  in i2c_imx_stop()
268 	ret = wait_for_sr_state(i2c_bus, ST_BUS_IDLE);  in i2c_imx_stop()
277 static int i2c_init_transfer_(struct mxc_i2c_bus *i2c_bus, u8 chip,  in i2c_init_transfer_()  argument
282 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in i2c_init_transfer_()
283 	ulong base = i2c_bus->base;  in i2c_init_transfer_()
304 	ret = wait_for_sr_state(i2c_bus, ST_BUS_IDLE);  in i2c_init_transfer_()
313 	ret = wait_for_sr_state(i2c_bus, ST_BUS_BUSY);  in i2c_init_transfer_()
321 	ret = tx_byte(i2c_bus, chip << 1);  in i2c_init_transfer_()
326 		ret = tx_byte(i2c_bus, (addr >> (alen * 8)) & 0xff);  in i2c_init_transfer_()
334 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)  in i2c_idle_bus()  argument
336 	if (i2c_bus && i2c_bus->idle_bus_fn)  in i2c_idle_bus()
337 		return i2c_bus->idle_bus_fn(i2c_bus->idle_bus_data);  in i2c_idle_bus()
352 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)  in i2c_idle_bus()  argument
354 	struct udevice *bus = i2c_bus->bus;  in i2c_idle_bus()
355 	struct gpio_desc *scl_gpio = &i2c_bus->scl_gpio;  in i2c_idle_bus()
356 	struct gpio_desc *sda_gpio = &i2c_bus->sda_gpio;  in i2c_idle_bus()
412 static int i2c_init_transfer(struct mxc_i2c_bus *i2c_bus, u8 chip,  in i2c_init_transfer()  argument
417 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_init_transfer()
420 	if (!i2c_bus->base)  in i2c_init_transfer()
424 		ret = i2c_init_transfer_(i2c_bus, chip, addr, alen);  in i2c_init_transfer()
427 		i2c_imx_stop(i2c_bus);  in i2c_init_transfer()
435 			writeb(I2CR_IDIS, i2c_bus->base + (I2CR << reg_shift));  in i2c_init_transfer()
437 		if (i2c_idle_bus(i2c_bus) < 0)  in i2c_init_transfer()
440 	printf("%s: give up i2c_regs=0x%lx\n", __func__, i2c_bus->base);  in i2c_init_transfer()
445 static int i2c_write_data(struct mxc_i2c_bus *i2c_bus, u8 chip, const u8 *buf,  in i2c_write_data()  argument
458 		ret = tx_byte(i2c_bus, buf[i]);  in i2c_write_data()
468 static int i2c_read_data(struct mxc_i2c_bus *i2c_bus, uchar chip, uchar *buf,  in i2c_read_data()  argument
474 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_read_data()
476 	ulong base = i2c_bus->base;  in i2c_read_data()
492 		ret = wait_for_sr_state(i2c_bus, ST_IIF);  in i2c_read_data()
495 			i2c_imx_stop(i2c_bus);  in i2c_read_data()
504 			i2c_imx_stop(i2c_bus);  in i2c_read_data()
519 	i2c_imx_stop(i2c_bus);  in i2c_read_data()
527 static int bus_i2c_read(struct mxc_i2c_bus *i2c_bus, u8 chip, u32 addr,  in bus_i2c_read()  argument
532 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in bus_i2c_read()
534 	ulong base = i2c_bus->base;  in bus_i2c_read()
536 	ret = i2c_init_transfer(i2c_bus, chip, addr, alen);  in bus_i2c_read()
544 	ret = tx_byte(i2c_bus, (chip << 1) | 1);  in bus_i2c_read()
546 		i2c_imx_stop(i2c_bus);  in bus_i2c_read()
550 	ret = i2c_read_data(i2c_bus, chip, buf, len);  in bus_i2c_read()
552 	i2c_imx_stop(i2c_bus);  in bus_i2c_read()
559 static int bus_i2c_write(struct mxc_i2c_bus *i2c_bus, u8 chip, u32 addr,  in bus_i2c_write()  argument
564 	ret = i2c_init_transfer(i2c_bus, chip, addr, alen);  in bus_i2c_write()
568 	ret = i2c_write_data(i2c_bus, chip, buf, len);  in bus_i2c_write()
570 	i2c_imx_stop(i2c_bus);  in bus_i2c_write()
740 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
742 	return bus_i2c_set_bus_speed(i2c_bus, speed);
747 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
753 	i2c_bus->driver_data = dev_get_driver_data(bus);
759 	i2c_bus->base = addr;
760 	i2c_bus->index = bus->seq;
761 	i2c_bus->bus = bus;
774 		debug("i2c bus %d at 0x%2lx, no gpio pinctrl state.\n", bus->seq, i2c_bus->base);
777 				"scl-gpios", 0, &i2c_bus->scl_gpio,
780 				"sda-gpios", 0, &i2c_bus->sda_gpio,
782 		if (!dm_gpio_is_valid(&i2c_bus->sda_gpio) |
783 		    !dm_gpio_is_valid(&i2c_bus->scl_gpio) |
785 			dev_err(dev, "i2c bus %d at %lu, fail to request scl/sda gpio\n", bus->seq, i2c_bus->base);
790 	ret = i2c_idle_bus(i2c_bus);
803 	      bus->seq, i2c_bus->base,
804 	      i2c_bus->speed);
813 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
815 	ret = i2c_init_transfer(i2c_bus, chip_addr, 0, 0);
821 	i2c_imx_stop(i2c_bus);
828 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
830 	ulong base = i2c_bus->base;
831 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?
839 	ret = i2c_init_transfer(i2c_bus, msg->addr, 0, 0);
849 			ret = i2c_read_data(i2c_bus, msg->addr, msg->buf,
852 			ret = i2c_write_data(i2c_bus, msg->addr, msg->buf,
862 				ret = tx_byte(i2c_bus, (msg->addr << 1) | 1);
864 					i2c_imx_stop(i2c_bus);
874 	i2c_imx_stop(i2c_bus);