4  * SPDX-License-Identifier: Apache-2.0
11 #include <zephyr/dt-bindings/led/led.h>
42 	const struct ws2812_led_strip_config *config = dev->config;  in ws2812_led_strip_sm_init()
44 		sys_clock_hw_cycles_per_sec() / (config->cycles_per_bit * config->frequency);  in ws2812_led_strip_sm_init()
49 	pio = pio_rpi_pico_get_pio(config->piodev);  in ws2812_led_strip_sm_init()
53 		return -EINVAL;  in ws2812_led_strip_sm_init()
57 	sm_config_set_sideset_pins(&sm_config, config->gpio_pin);  in ws2812_led_strip_sm_init()
58 	sm_config_set_out_shift(&sm_config, false, true, (config->num_colors == 4 ? 32 : 24));  in ws2812_led_strip_sm_init()
61 	pio_sm_set_consecutive_pindirs(pio, sm, config->gpio_pin, 1, true);  in ws2812_led_strip_sm_init()
62 	pio_sm_init(pio, sm, -1, &sm_config);  in ws2812_led_strip_sm_init()
79 	const struct ws2812_led_strip_config *config = dev->config;  in ws2812_led_strip_update_rgb()
80 	struct ws2812_led_strip_data *data = dev->data;  in ws2812_led_strip_update_rgb()
81 	PIO pio = pio_rpi_pico_get_pio(config->piodev);  in ws2812_led_strip_update_rgb()
86 		for (size_t j = 0; j < config->num_colors; j++) {  in ws2812_led_strip_update_rgb()
87 			switch (config->color_mapping[j]) {  in ws2812_led_strip_update_rgb()
93 				color |= pixels[i].r << (8 * (2 - j));  in ws2812_led_strip_update_rgb()
96 				color |= pixels[i].g << (8 * (2 - j));  in ws2812_led_strip_update_rgb()
99 				color |= pixels[i].b << (8 * (2 - j));  in ws2812_led_strip_update_rgb()
104 		pio_sm_put_blocking(pio, data->sm, color << (config->num_colors == 4 ? 0 : 8));  in ws2812_led_strip_update_rgb()
107 	ws2812_led_strip_reset_delay(config->reset_delay);  in ws2812_led_strip_update_rgb()
114 	const struct ws2812_led_strip_config *config = dev->config;  in ws2812_led_strip_length()
116 	return config->length;  in ws2812_led_strip_length()
126  * "color-mapping" DT property.
130 	const struct ws2812_led_strip_config *config = dev->config;  in ws2812_led_strip_init()
131 	struct ws2812_led_strip_data *data = dev->data;  in ws2812_led_strip_init()
134 	if (!device_is_ready(config->piodev)) {  in ws2812_led_strip_init()
135 		LOG_ERR("%s: PIO device not ready", dev->name);  in ws2812_led_strip_init()
136 		return -ENODEV;  in ws2812_led_strip_init()
139 	for (uint32_t i = 0; i < config->num_colors; i++) {  in ws2812_led_strip_init()
140 		switch (config->color_mapping[i]) {  in ws2812_led_strip_init()
148 				" Check the color-mapping DT property",  in ws2812_led_strip_init()
149 				dev->name);  in ws2812_led_strip_init()
150 			return -EINVAL;  in ws2812_led_strip_init()
159 	data->sm = sm;  in ws2812_led_strip_init()
166 	const struct ws2812_rpi_pico_pio_config *config = dev->config;  in ws2812_rpi_pico_pio_init()
169 	if (!device_is_ready(config->piodev)) {  in ws2812_rpi_pico_pio_init()
170 		LOG_ERR("%s: PIO device not ready", dev->name);  in ws2812_rpi_pico_pio_init()
171 		return -ENODEV;  in ws2812_rpi_pico_pio_init()
174 	pio = pio_rpi_pico_get_pio(config->piodev);  in ws2812_rpi_pico_pio_init()
176 	pio_add_program(pio, &config->program);  in ws2812_rpi_pico_pio_init()
178 	return pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);  in ws2812_rpi_pico_pio_init()
206 	(op | (((DT_INST_PROP_BY_IDX(inst, bit_waveform, i) - 1) & 0xF) << 8))
209  * This pio program runs [T0+T1+T2] cycles per 1 loop.
210  * The first `out` instruction outputs 0 by [T2] times to the sideset pin.
212  * The second `jmp` instruction output 1 by [T0] times to the sideset pin.
220  * In the case of configuration, T0=3, T1=3, T2 =4,
231 		SET_DELAY(0x6021, inst, 2), /*  0: out    x, 1  side 0 [T2 - 1]  */                \
232 		SET_DELAY(0x1023, inst, 0), /*  1: jmp    !x, 3 side 1 [T0 - 1]  */                \
233 		SET_DELAY(0x1000, inst, 1), /*  2: jmp    0     side 1 [T1 - 1]  */                \
234 		SET_DELAY(0x0000, inst, 1), /*  3: jmp    0     side 0 [T1 - 1]  */                \
244 				.origin = -1,                                                      \