4  * SPDX-License-Identifier: Apache-2.0
38 	0x0642, /*  3: jmp    x--, 2                 [6]  */
44 	0x2020, /*  0: wait   0 pin, 0                    */
47 	0x0642, /*  3: jmp    x--, 2                 [6]  */
48 	0x00c8, /*  4: jmp    pin, 8                      */
50 	0x20a0, /*  6: wait   1 pin, 0                    */
58 	uint32_t offset;  in pio_uart_tx_init()  local
62 		return -EBUSY;  in pio_uart_tx_init()
65 	offset = pio_add_program(pio, RPI_PICO_PIO_GET_PROGRAM(uart_tx));  in pio_uart_tx_init()
75 			   offset + RPI_PICO_PIO_GET_WRAP_TARGET(uart_tx),  in pio_uart_tx_init()
76 			   offset + RPI_PICO_PIO_GET_WRAP(uart_tx));  in pio_uart_tx_init()
80 	pio_sm_init(pio, sm, offset, &sm_config);  in pio_uart_tx_init()
89 	uint32_t offset;  in pio_uart_rx_init()  local
92 		return -EBUSY;  in pio_uart_rx_init()
95 	offset = pio_add_program(pio, RPI_PICO_PIO_GET_PROGRAM(uart_rx));  in pio_uart_rx_init()
105 			   offset + RPI_PICO_PIO_GET_WRAP_TARGET(uart_rx),  in pio_uart_rx_init()
106 			   offset + RPI_PICO_PIO_GET_WRAP(uart_rx));  in pio_uart_rx_init()
108 	pio_sm_init(pio, sm, offset, &sm_config);  in pio_uart_rx_init()
116 	const struct pio_uart_config *config = dev->config;  in pio_uart_poll_in()
117 	PIO pio = pio_rpi_pico_get_pio(config->piodev);  in pio_uart_poll_in()
118 	struct pio_uart_data *data = dev->data;  in pio_uart_poll_in()
125 	uart_rx_fifo_msb = (io_rw_8 *)&pio->rxf[data->rx_sm] + 3;  in pio_uart_poll_in()
126 	if (pio_sm_is_rx_fifo_empty(pio, data->rx_sm)) {  in pio_uart_poll_in()
127 		return -1;  in pio_uart_poll_in()
137 	const struct pio_uart_config *config = dev->config;  in pio_uart_poll_out()
138 	struct pio_uart_data *data = dev->data;  in pio_uart_poll_out()
140 	pio_sm_put_blocking(pio_rpi_pico_get_pio(config->piodev), data->tx_sm, (uint32_t)c);  in pio_uart_poll_out()
145 	const struct pio_uart_config *config = dev->config;  in pio_uart_init()
146 	struct pio_uart_data *data = dev->data;  in pio_uart_init()
153 	pio = pio_rpi_pico_get_pio(config->piodev);  in pio_uart_init()
154 	sm_clock_div = (float)clock_get_hz(clk_sys) / (CYCLES_PER_BIT * config->baudrate);  in pio_uart_init()
156 	retval = pio_rpi_pico_allocate_sm(config->piodev, &tx_sm);  in pio_uart_init()
157 	retval |= pio_rpi_pico_allocate_sm(config->piodev, &rx_sm);  in pio_uart_init()
163 	data->tx_sm = tx_sm;  in pio_uart_init()
164 	data->rx_sm = rx_sm;  in pio_uart_init()
166 	retval = pio_uart_tx_init(pio, tx_sm, config->tx_pin, sm_clock_div);  in pio_uart_init()
171 	retval = pio_uart_rx_init(pio, rx_sm, config->rx_pin, sm_clock_div);  in pio_uart_init()
176 	return pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);  in pio_uart_init()