136 static uint8_t i2c_imx_get_clk(struct mxc_i2c_bus *i2c_bus, unsigned int rate)  in i2c_imx_get_clk()  argument
169 static int bus_i2c_set_bus_speed(struct mxc_i2c_bus *i2c_bus, int speed)  in bus_i2c_set_bus_speed()  argument
171 	ulong base = i2c_bus->base;  in bus_i2c_set_bus_speed()
172 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in bus_i2c_set_bus_speed()
173 	u8 clk_idx = i2c_imx_get_clk(i2c_bus, speed);  in bus_i2c_set_bus_speed()
193 static int wait_for_sr_state(struct mxc_i2c_bus *i2c_bus, unsigned state)  in wait_for_sr_state()  argument
197 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in wait_for_sr_state()
199 	ulong base = i2c_bus->base;  in wait_for_sr_state()
227 static int tx_byte(struct mxc_i2c_bus *i2c_bus, u8 byte)  in tx_byte()  argument
230 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in tx_byte()
232 	ulong base = i2c_bus->base;  in tx_byte()
237 	ret = wait_for_sr_state(i2c_bus, ST_IIF);  in tx_byte()
257 static void i2c_imx_stop(struct mxc_i2c_bus *i2c_bus)  in i2c_imx_stop()  argument
260 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_imx_stop()
262 	ulong base = i2c_bus->base;  in i2c_imx_stop()
267 	ret = wait_for_sr_state(i2c_bus, ST_BUS_IDLE);  in i2c_imx_stop()
276 static int i2c_init_transfer_(struct mxc_i2c_bus *i2c_bus, u8 chip,  in i2c_init_transfer_()  argument
281 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in i2c_init_transfer_()
282 	ulong base = i2c_bus->base;  in i2c_init_transfer_()
303 	ret = wait_for_sr_state(i2c_bus, ST_BUS_IDLE);  in i2c_init_transfer_()
312 	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_()
336 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)  in i2c_idle_bus()  argument
338 	if (i2c_bus && i2c_bus->idle_bus_fn)  in i2c_idle_bus()
339 		return i2c_bus->idle_bus_fn(i2c_bus->idle_bus_data);  in i2c_idle_bus()
354 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)  in i2c_idle_bus()  argument
356 	struct udevice *bus = i2c_bus->bus;  in i2c_idle_bus()
357 	struct gpio_desc *scl_gpio = &i2c_bus->scl_gpio;  in i2c_idle_bus()
358 	struct gpio_desc *sda_gpio = &i2c_bus->sda_gpio;  in i2c_idle_bus()
414 static int i2c_init_transfer(struct mxc_i2c_bus *i2c_bus, u8 chip,  in i2c_init_transfer()  argument
419 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_init_transfer()
422 	if (!i2c_bus->base)  in i2c_init_transfer()
426 		ret = i2c_init_transfer_(i2c_bus, chip, addr, alen);  in i2c_init_transfer()
429 		i2c_imx_stop(i2c_bus);  in i2c_init_transfer()
437 			writeb(I2CR_IDIS, i2c_bus->base + (I2CR << reg_shift));  in i2c_init_transfer()
439 		if (i2c_idle_bus(i2c_bus) < 0)  in i2c_init_transfer()
442 	printf("%s: give up i2c_regs=0x%lx\n", __func__, i2c_bus->base);  in i2c_init_transfer()
447 static int i2c_write_data(struct mxc_i2c_bus *i2c_bus, u8 chip, const u8 *buf,  in i2c_write_data()  argument
460 		ret = tx_byte(i2c_bus, buf[i]);  in i2c_write_data()
470 static int i2c_read_data(struct mxc_i2c_bus *i2c_bus, uchar chip, uchar *buf,  in i2c_read_data()  argument
476 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_read_data()
478 	ulong base = i2c_bus->base;  in i2c_read_data()
494 		ret = wait_for_sr_state(i2c_bus, ST_IIF);  in i2c_read_data()
497 			i2c_imx_stop(i2c_bus);  in i2c_read_data()
506 			i2c_imx_stop(i2c_bus);  in i2c_read_data()
521 	i2c_imx_stop(i2c_bus);  in i2c_read_data()
529 static int bus_i2c_read(struct mxc_i2c_bus *i2c_bus, u8 chip, u32 addr,  in bus_i2c_read()  argument
534 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in bus_i2c_read()
536 	ulong base = i2c_bus->base;  in bus_i2c_read()
538 	ret = i2c_init_transfer(i2c_bus, chip, addr, alen);  in bus_i2c_read()
548 	ret = tx_byte(i2c_bus, (chip << 1) | 1);  in bus_i2c_read()
550 		i2c_imx_stop(i2c_bus);  in bus_i2c_read()
554 	ret = i2c_read_data(i2c_bus, chip, buf, len);  in bus_i2c_read()
556 	i2c_imx_stop(i2c_bus);  in bus_i2c_read()
563 static int bus_i2c_write(struct mxc_i2c_bus *i2c_bus, u8 chip, u32 addr,  in bus_i2c_write()  argument
568 	ret = i2c_init_transfer(i2c_bus, chip, addr, alen);  in bus_i2c_write()
572 	ret = i2c_write_data(i2c_bus, chip, buf, len);  in bus_i2c_write()
574 	i2c_imx_stop(i2c_bus);  in bus_i2c_write()
800 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
802 	return bus_i2c_set_bus_speed(i2c_bus, speed);
807 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
813 	i2c_bus->driver_data = dev_get_driver_data(bus);
819 	i2c_bus->base = addr;
820 	i2c_bus->index = bus->seq;
821 	i2c_bus->bus = bus;
834 		debug("i2c bus %d at 0x%2lx, no gpio pinctrl state.\n", bus->seq, i2c_bus->base);
837 				"scl-gpios", 0, &i2c_bus->scl_gpio,
840 				"sda-gpios", 0, &i2c_bus->sda_gpio,
842 		if (!dm_gpio_is_valid(&i2c_bus->sda_gpio) ||
843 		    !dm_gpio_is_valid(&i2c_bus->scl_gpio) ||
845 			dev_err(dev, "i2c bus %d at %lu, fail to request scl/sda gpio\n", bus->seq, i2c_bus->base);
850 	ret = i2c_idle_bus(i2c_bus);
863 	      bus->seq, i2c_bus->base,
864 	      i2c_bus->speed);
873 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
875 	ret = i2c_init_transfer(i2c_bus, chip_addr, 0, 0);
881 	i2c_imx_stop(i2c_bus);
888 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
890 	ulong base = i2c_bus->base;
891 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?
899 	ret = i2c_init_transfer(i2c_bus, msg->addr, 0, 0);
909 			ret = i2c_read_data(i2c_bus, msg->addr, msg->buf,
912 			ret = i2c_write_data(i2c_bus, msg->addr, msg->buf,
922 				ret = tx_byte(i2c_bus, (msg->addr << 1) | 1);
924 					i2c_imx_stop(i2c_bus);
934 	i2c_imx_stop(i2c_bus);