You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
373 lines
11 KiB
373 lines
11 KiB
/* |
|
* Copyright (c) 2025 MASSDRIVER EI (massdriver.space) |
|
* |
|
* SPDX-License-Identifier: Apache-2.0 |
|
*/ |
|
|
|
#include <zephyr/logging/log.h> |
|
LOG_MODULE_REGISTER(ssd1331, CONFIG_DISPLAY_LOG_LEVEL); |
|
|
|
#include <string.h> |
|
#include <zephyr/device.h> |
|
#include <zephyr/init.h> |
|
#include <zephyr/drivers/display.h> |
|
#include <zephyr/drivers/gpio.h> |
|
#include <zephyr/drivers/mipi_dbi.h> |
|
#include <zephyr/kernel.h> |
|
|
|
#define SSD1331_DISPLAY_OFF 0xAE |
|
#define SSD1331_DISPLAY_ON 0xAF |
|
#define SSD1331_SET_NORMAL_DISPLAY 0xA4 |
|
#define SSD1331_SET_REVERSE_DISPLAY 0xA7 |
|
|
|
#define SSD1331_SET_COLUMN_ADDR 0x15 |
|
#define SSD1331_SET_ROW_ADDR 0x75 |
|
|
|
#define SSD1331_SET_DISPLAY_START_LINE 0xA1 |
|
#define SSD1331_SET_DISPLAY_OFFSET 0xA2 |
|
#define SSD1331_SET_MULTIPLEX_RATIO 0xA8 |
|
#define SSD1331_SET_PHASE_LENGTH 0xB1 |
|
#define SSD1331_SET_OSC_FREQ 0xB3 |
|
#define SSD1331_SET_PRECHARGE_A 0x8A |
|
#define SSD1331_SET_PRECHARGE_B 0x8B |
|
#define SSD1331_SET_PRECHARGE_C 0x8C |
|
#define SSD1331_SET_PRECHARGE_V 0xBB |
|
#define SSD1331_SET_VCOMH 0xBE |
|
#define SSD1331_SET_CURRENT_ATT 0x87 |
|
#define SSD1331_SET_REMAP 0xA0 |
|
#define SSD1331_DISABLE_SCROLL 0x2E |
|
|
|
#define SSD1331_SET_EXTERNAL_SUPPLY 0xAD |
|
#define SSD1331_EXTERNAL_SUPPLY 0x8E |
|
|
|
#define SSD1331_SET_POWER_SAVE 0xB0 |
|
#define SSD1331_POWER_SAVE 0x1A |
|
#define SSD1331_NOT_POWER_SAVE 0x0B |
|
|
|
#define SSD1331_CONTRASTA 0x81 |
|
#define SSD1331_CONTRASTB 0x82 |
|
#define SSD1331_CONTRASTC 0x83 |
|
|
|
#define SSD1331_RESET_DELAY 10 |
|
|
|
struct ssd1331_config { |
|
const struct device *mipi_dev; |
|
const struct mipi_dbi_config dbi_config; |
|
uint16_t height; |
|
uint16_t width; |
|
uint8_t start_line; |
|
uint8_t display_offset; |
|
uint8_t multiplex_ratio; |
|
uint8_t phase_length; |
|
uint8_t oscillator_freq; |
|
uint8_t precharge_time_a; |
|
uint8_t precharge_time_b; |
|
uint8_t precharge_time_c; |
|
uint8_t precharge_voltage; |
|
uint8_t vcomh_voltage; |
|
uint8_t current_att; |
|
uint8_t remap_value; |
|
bool power_save; |
|
bool color_inversion; |
|
}; |
|
|
|
/* SSD1331 doesn't follow typical DBI behavior with D/C pin so we do this to make it fit in DBI */ |
|
static inline int ssd1331_write_command(const struct device *dev, uint8_t cmd, const uint8_t *buf, |
|
size_t len) |
|
{ |
|
const struct ssd1331_config *config = dev->config; |
|
int err; |
|
|
|
err = mipi_dbi_command_write(config->mipi_dev, &config->dbi_config, cmd, NULL, 0); |
|
if (err < 0) { |
|
return err; |
|
} |
|
for (int x = 0; x < len; x++) { |
|
err = mipi_dbi_command_write(config->mipi_dev, &config->dbi_config, buf[x], NULL, |
|
0); |
|
if (err < 0) { |
|
return err; |
|
} |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static inline int ssd1331_set_hardware_config(const struct device *dev) |
|
{ |
|
const struct ssd1331_config *config = dev->config; |
|
int err; |
|
uint8_t tmp; |
|
|
|
err = ssd1331_write_command(dev, SSD1331_SET_REMAP, &config->remap_value, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_DISPLAY_START_LINE, &config->start_line, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_DISPLAY_OFFSET, &config->display_offset, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_MULTIPLEX_RATIO, &config->multiplex_ratio, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
tmp = SSD1331_EXTERNAL_SUPPLY; |
|
err = ssd1331_write_command(dev, SSD1331_SET_EXTERNAL_SUPPLY, &tmp, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
tmp = config->power_save ? SSD1331_POWER_SAVE : SSD1331_NOT_POWER_SAVE; |
|
err = ssd1331_write_command(dev, SSD1331_SET_POWER_SAVE, &tmp, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_PHASE_LENGTH, &config->phase_length, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_OSC_FREQ, &config->oscillator_freq, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_PRECHARGE_A, &config->precharge_time_a, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_PRECHARGE_B, &config->precharge_time_b, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_PRECHARGE_C, &config->precharge_time_c, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_PRECHARGE_V, &config->precharge_voltage, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_VCOMH, &config->vcomh_voltage, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
err = ssd1331_write_command(dev, SSD1331_SET_CURRENT_ATT, &config->current_att, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
return ssd1331_write_command(dev, SSD1331_DISABLE_SCROLL, NULL, 0); |
|
} |
|
|
|
static int ssd1331_resume(const struct device *dev) |
|
{ |
|
const struct ssd1331_config *config = dev->config; |
|
int err; |
|
|
|
err = ssd1331_write_command(dev, SSD1331_DISPLAY_ON, NULL, 0); |
|
if (err < 0) { |
|
return err; |
|
} |
|
return mipi_dbi_release(config->mipi_dev, &config->dbi_config); |
|
} |
|
|
|
static int ssd1331_suspend(const struct device *dev) |
|
{ |
|
const struct ssd1331_config *config = dev->config; |
|
int err; |
|
|
|
err = ssd1331_write_command(dev, SSD1331_DISPLAY_OFF, NULL, 0); |
|
if (err < 0) { |
|
return err; |
|
} |
|
return mipi_dbi_release(config->mipi_dev, &config->dbi_config); |
|
} |
|
|
|
static int ssd1331_write(const struct device *dev, const uint16_t x, const uint16_t y, |
|
const struct display_buffer_descriptor *desc, const void *buf) |
|
{ |
|
const struct ssd1331_config *config = dev->config; |
|
int err; |
|
size_t buf_len; |
|
struct display_buffer_descriptor mipi_desc = *desc; |
|
uint8_t x_position[] = {x, x + desc->width - 1}; |
|
uint8_t y_position[] = {y, y + desc->height - 1}; |
|
|
|
if (desc->pitch != desc->width) { |
|
LOG_ERR("Pitch is not width"); |
|
return -EINVAL; |
|
} |
|
|
|
/* Following the datasheet, two segment are split in one register */ |
|
buf_len = MIN(desc->buf_size, desc->height * desc->width * 2); |
|
if (buf == NULL || buf_len == 0U) { |
|
LOG_ERR("Display buffer is not available"); |
|
return -EINVAL; |
|
} |
|
|
|
LOG_DBG("x %u, y %u, pitch %u, width %u, height %u, buf_len %u", x, y, desc->pitch, |
|
desc->width, desc->height, buf_len); |
|
|
|
err = ssd1331_write_command(dev, SSD1331_SET_COLUMN_ADDR, x_position, 2); |
|
if (err < 0) { |
|
return err; |
|
} |
|
|
|
err = ssd1331_write_command(dev, SSD1331_SET_ROW_ADDR, y_position, 2); |
|
if (err < 0) { |
|
return err; |
|
} |
|
|
|
err = mipi_dbi_write_display(config->mipi_dev, &config->dbi_config, buf, &mipi_desc, |
|
PIXEL_FORMAT_RGB_565); |
|
if (err < 0) { |
|
return err; |
|
} |
|
return mipi_dbi_release(config->mipi_dev, &config->dbi_config); |
|
} |
|
|
|
static int ssd1331_set_contrast(const struct device *dev, const uint8_t contrast) |
|
{ |
|
int err; |
|
uint8_t tmp; |
|
|
|
tmp = (contrast * CONFIG_SSD1331_CONTRASTA) / 0xFF; |
|
err = ssd1331_write_command(dev, SSD1331_CONTRASTA, &tmp, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
tmp = (contrast * CONFIG_SSD1331_CONTRASTB) / 0xFF; |
|
err = ssd1331_write_command(dev, SSD1331_CONTRASTB, &tmp, 1); |
|
if (err < 0) { |
|
return err; |
|
} |
|
tmp = (contrast * CONFIG_SSD1331_CONTRASTC) / 0xFF; |
|
return ssd1331_write_command(dev, SSD1331_CONTRASTC, &tmp, 1); |
|
} |
|
|
|
static void ssd1331_get_capabilities(const struct device *dev, struct display_capabilities *caps) |
|
{ |
|
const struct ssd1331_config *config = dev->config; |
|
|
|
memset(caps, 0, sizeof(struct display_capabilities)); |
|
caps->x_resolution = config->width; |
|
caps->y_resolution = config->height; |
|
caps->supported_pixel_formats = PIXEL_FORMAT_RGB_565; |
|
caps->current_pixel_format = PIXEL_FORMAT_RGB_565; |
|
caps->screen_info = 0; |
|
} |
|
|
|
static int ssd1331_set_pixel_format(const struct device *dev, const enum display_pixel_format pf) |
|
{ |
|
if (pf == PIXEL_FORMAT_RGB_565) { |
|
return 0; |
|
} |
|
LOG_ERR("Unsupported pixel format"); |
|
return -ENOTSUP; |
|
} |
|
|
|
static int ssd1331_init_device(const struct device *dev) |
|
{ |
|
const struct ssd1331_config *config = dev->config; |
|
int err; |
|
|
|
/* Turn display off */ |
|
err = ssd1331_suspend(dev); |
|
if (err < 0) { |
|
return err; |
|
} |
|
|
|
err = ssd1331_set_hardware_config(dev); |
|
if (err < 0) { |
|
return err; |
|
} |
|
|
|
err = ssd1331_set_contrast(dev, CONFIG_SSD1331_DEFAULT_CONTRAST); |
|
if (err < 0) { |
|
return err; |
|
} |
|
|
|
err = ssd1331_write_command(dev, |
|
config->color_inversion ? SSD1331_SET_REVERSE_DISPLAY |
|
: SSD1331_SET_NORMAL_DISPLAY, |
|
NULL, 0); |
|
if (err < 0) { |
|
return err; |
|
} |
|
|
|
err = ssd1331_resume(dev); |
|
if (err < 0) { |
|
return err; |
|
} |
|
|
|
return mipi_dbi_release(config->mipi_dev, &config->dbi_config); |
|
} |
|
|
|
static int ssd1331_init(const struct device *dev) |
|
{ |
|
const struct ssd1331_config *config = dev->config; |
|
int err; |
|
|
|
LOG_DBG("Initializing device"); |
|
|
|
if (!device_is_ready(config->mipi_dev)) { |
|
LOG_ERR("MIPI Device not ready!"); |
|
return -EINVAL; |
|
} |
|
|
|
err = mipi_dbi_reset(config->mipi_dev, SSD1331_RESET_DELAY); |
|
if (err < 0) { |
|
LOG_ERR("Failed to reset device!"); |
|
return err; |
|
} |
|
|
|
err = ssd1331_init_device(dev); |
|
if (err < 0) { |
|
LOG_ERR("Failed to initialize device! %d", err); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static DEVICE_API(display, ssd1331_driver_api) = { |
|
.blanking_on = ssd1331_suspend, |
|
.blanking_off = ssd1331_resume, |
|
.write = ssd1331_write, |
|
.set_contrast = ssd1331_set_contrast, |
|
.get_capabilities = ssd1331_get_capabilities, |
|
.set_pixel_format = ssd1331_set_pixel_format, |
|
}; |
|
|
|
#define SSD1331_WORD_SIZE(inst) \ |
|
((DT_STRING_UPPER_TOKEN(inst, mipi_mode) == MIPI_DBI_MODE_SPI_4WIRE) ? SPI_WORD_SET(8) \ |
|
: SPI_WORD_SET(9)) |
|
|
|
#define SSD1331_DEFINE_MIPI(node_id) \ |
|
static const struct ssd1331_config config##node_id = { \ |
|
.mipi_dev = DEVICE_DT_GET(DT_PARENT(node_id)), \ |
|
.dbi_config = MIPI_DBI_CONFIG_DT( \ |
|
node_id, SSD1331_WORD_SIZE(node_id) | SPI_OP_MODE_MASTER, 0), \ |
|
.height = DT_PROP(node_id, height), \ |
|
.width = DT_PROP(node_id, width), \ |
|
.display_offset = DT_PROP(node_id, display_offset), \ |
|
.start_line = DT_PROP(node_id, start_line), \ |
|
.multiplex_ratio = DT_PROP(node_id, multiplex_ratio), \ |
|
.phase_length = DT_PROP(node_id, phase_length), \ |
|
.oscillator_freq = DT_PROP(node_id, oscillator_freq), \ |
|
.power_save = DT_PROP(node_id, power_save), \ |
|
.precharge_time_a = DT_PROP(node_id, precharge_time_a), \ |
|
.precharge_time_b = DT_PROP(node_id, precharge_time_b), \ |
|
.precharge_time_c = DT_PROP(node_id, precharge_time_c), \ |
|
.precharge_voltage = DT_PROP(node_id, precharge_voltage), \ |
|
.vcomh_voltage = DT_PROP(node_id, vcomh_voltage), \ |
|
.current_att = DT_PROP(node_id, current_att), \ |
|
.color_inversion = DT_PROP(node_id, inversion_on), \ |
|
.remap_value = DT_PROP(node_id, remap_value), \ |
|
}; \ |
|
\ |
|
DEVICE_DT_DEFINE(node_id, ssd1331_init, NULL, NULL, &config##node_id, \ |
|
POST_KERNEL, CONFIG_DISPLAY_INIT_PRIORITY, &ssd1331_driver_api); |
|
|
|
DT_FOREACH_STATUS_OKAY(solomon_ssd1331, SSD1331_DEFINE_MIPI)
|
|
|