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drivers: display: ssd1306: Support connecting SPI and I2C at the same

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Support connecting different display for each SPI and I2C
at the same time.

In a case like DTS below.

```
&spi1 {
        ssd1306_spi: ssd1306@0 {
		compatible = "solomon,ssd1306fb";
                ...
        };

};

&i2c0 {
        ssd1306_i2c: ssd1306@3c {
		compatible = "solomon,ssd1306fb";
		...
	};
};
```

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>
This commit is contained in:
TOKITA Hiroshi 2023-04-14 01:27:19 +09:00 • committed by Martí Bolívar
commit 9fcfb31c82
1 changed files with 97 additions and 55 deletions
Download patch file Download diff file Expand all files Collapse all files

152
drivers/display/ssd1306.c
View file

@ -4,12 +4,6 @@
* SPDX-License-Identifier: Apache-2.0
*/
#if defined(CONFIG_DT_HAS_SOLOMON_SSD1306FB_ENABLED)
#define DT_DRV_COMPAT solomon_ssd1306fb
#elif defined(CONFIG_DT_HAS_SINOWEALTH_SH1106_ENABLED)
#define DT_DRV_COMPAT sinowealth_sh1106
#endif
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(ssd1306, CONFIG_DISPLAY_LOG_LEVEL);
@ -33,14 +27,23 @@ LOG_MODULE_REGISTER(ssd1306, CONFIG_DISPLAY_LOG_LEVEL);
#define SSD1306_ADDRESSING_MODE (SSD1306_SET_MEM_ADDRESSING_HORIZONTAL)
#endif
union ssd1306_bus {
struct i2c_dt_spec i2c;
struct spi_dt_spec spi;
};
typedef bool (*ssd1306_bus_ready_fn)(const struct device *dev);
typedef int (*ssd1306_write_bus_fn)(const struct device *dev, uint8_t *buf, size_t len,
bool command);
typedef const char *(*ssd1306_bus_name_fn)(const struct device *dev);
struct ssd1306_config {
#if DT_INST_ON_BUS(0, i2c)
struct i2c_dt_spec bus;
#elif DT_INST_ON_BUS(0, spi)
struct spi_dt_spec bus;
union ssd1306_bus bus;
struct gpio_dt_spec data_cmd;
#endif
struct gpio_dt_spec reset;
ssd1306_bus_ready_fn bus_ready;
ssd1306_write_bus_fn write_bus;
ssd1306_bus_name_fn bus_name;
uint16_t height;
uint16_t width;
uint8_t segment_offset;
@ -61,29 +64,36 @@ struct ssd1306_data {
uint8_t scan_mode;
};
#if DT_INST_ON_BUS(0, i2c)
static inline bool ssd1306_bus_ready(const struct device *dev)
#if (DT_HAS_COMPAT_ON_BUS_STATUS_OKAY(solomon_ssd1306fb, i2c) || \
DT_HAS_COMPAT_ON_BUS_STATUS_OKAY(sinowealth_sh1106, i2c))
static bool ssd1306_bus_ready_i2c(const struct device *dev)
{
const struct ssd1306_config *config = dev->config;
return device_is_ready(config->bus.bus);
return i2c_is_ready_dt(&config->bus.i2c);
}
static inline int ssd1306_write_bus(const struct device *dev,
uint8_t *buf, size_t len, bool command)
static int ssd1306_write_bus_i2c(const struct device *dev, uint8_t *buf, size_t len, bool command)
{
const struct ssd1306_config *config = dev->config;
return i2c_burst_write_dt(&config->bus,
return i2c_burst_write_dt(&config->bus.i2c,
command ? SSD1306_CONTROL_ALL_BYTES_CMD :
SSD1306_CONTROL_ALL_BYTES_DATA,
buf, len);
}
#elif DT_INST_ON_BUS(0, spi)
static const char *ssd1306_bus_name_i2c(const struct device *dev)
{
const struct ssd1306_config *config = dev->config;
static inline bool ssd1306_bus_ready(const struct device *dev)
return config->bus.i2c.bus->name;
}
#endif
#if (DT_HAS_COMPAT_ON_BUS_STATUS_OKAY(solomon_ssd1306fb, spi) || \
DT_HAS_COMPAT_ON_BUS_STATUS_OKAY(sinowealth_sh1106, spi))
static bool ssd1306_bus_ready_spi(const struct device *dev)
{
const struct ssd1306_config *config = dev->config;
@ -91,11 +101,10 @@ static inline bool ssd1306_bus_ready(const struct device *dev)
return false;
}
return spi_is_ready_dt(&config->bus);
return spi_is_ready_dt(&config->bus.spi);
}
static inline int ssd1306_write_bus(const struct device *dev,
uint8_t *buf, size_t len, bool command)
static int ssd1306_write_bus_spi(const struct device *dev, uint8_t *buf, size_t len, bool command)
{
const struct ssd1306_config *config = dev->config;
int errno;
@ -111,12 +120,34 @@ static inline int ssd1306_write_bus(const struct device *dev,
.count = 1
};
errno = spi_write_dt(&config->bus, &tx_bufs);
errno = spi_write_dt(&config->bus.spi, &tx_bufs);
return errno;
}
static const char *ssd1306_bus_name_spi(const struct device *dev)
{
const struct ssd1306_config *config = dev->config;
return config->bus.spi.bus->name;
}
#endif
static inline bool ssd1306_bus_ready(const struct device *dev)
{
const struct ssd1306_config *config = dev->config;
return config->bus_ready(dev);
}
static inline int ssd1306_write_bus(const struct device *dev, uint8_t *buf, size_t len,
bool command)
{
const struct ssd1306_config *config = dev->config;
return config->write_bus(dev, buf, len, command);
}
static inline int ssd1306_set_panel_orientation(const struct device *dev)
{
const struct ssd1306_config *config = dev->config;
@ -410,7 +441,7 @@ static int ssd1306_init(const struct device *dev)
k_sleep(K_TIMEOUT_ABS_MS(config->ready_time_ms));
if (!ssd1306_bus_ready(dev)) {
LOG_ERR("Bus device %s not ready!", config->bus.bus->name);
LOG_ERR("Bus device %s not ready!", config->bus_name(dev));
return -EINVAL;
}
@ -432,32 +463,6 @@ static int ssd1306_init(const struct device *dev)
return 0;
}
static const struct ssd1306_config ssd1306_config = {
#if DT_INST_ON_BUS(0, i2c)
.bus = I2C_DT_SPEC_INST_GET(0),
#elif DT_INST_ON_BUS(0, spi)
.bus = SPI_DT_SPEC_INST_GET(
0, SPI_OP_MODE_MASTER | SPI_TRANSFER_MSB | SPI_WORD_SET(8), 0),
.data_cmd = GPIO_DT_SPEC_INST_GET(0, data_cmd_gpios),
#endif
.reset = GPIO_DT_SPEC_INST_GET_OR(0, reset_gpios, { 0 }),
.height = DT_INST_PROP(0, height),
.width = DT_INST_PROP(0, width),
.segment_offset = DT_INST_PROP(0, segment_offset),
.page_offset = DT_INST_PROP(0, page_offset),
.display_offset = DT_INST_PROP(0, display_offset),
.multiplex_ratio = DT_INST_PROP(0, multiplex_ratio),
.segment_remap = DT_INST_PROP(0, segment_remap),
.com_invdir = DT_INST_PROP(0, com_invdir),
.com_sequential = DT_INST_PROP(0, com_sequential),
.prechargep = DT_INST_PROP(0, prechargep),
.color_inversion = DT_INST_PROP(0, inversion_on),
.sh1106_compatible = DT_NODE_HAS_COMPAT(0, sinowealth_sh1106),
.ready_time_ms = DT_INST_PROP(0, ready_time_ms),
};
static struct ssd1306_data ssd1306_driver;
static struct display_driver_api ssd1306_driver_api = {
.blanking_on = ssd1306_suspend,
.blanking_off = ssd1306_resume,
@ -471,7 +476,44 @@ static struct display_driver_api ssd1306_driver_api = {
.set_orientation = ssd1306_set_orientation,
};
DEVICE_DT_INST_DEFINE(0, ssd1306_init, NULL,
&ssd1306_driver, &ssd1306_config,
POST_KERNEL, CONFIG_DISPLAY_INIT_PRIORITY,
&ssd1306_driver_api);
#define SSD1306_CONFIG_SPI(node_id) \
.bus = {.spi = SPI_DT_SPEC_GET( \
node_id, SPI_OP_MODE_MASTER | SPI_TRANSFER_MSB | SPI_WORD_SET(8), 0)}, \
.bus_ready = ssd1306_bus_ready_spi, \
.write_bus = ssd1306_write_bus_spi, \
.bus_name = ssd1306_bus_name_spi, \
.data_cmd = GPIO_DT_SPEC_GET(node_id, data_cmd_gpios),
#define SSD1306_CONFIG_I2C(node_id) \
.bus = {.i2c = I2C_DT_SPEC_GET(node_id)}, \
.bus_ready = ssd1306_bus_ready_i2c, \
.write_bus = ssd1306_write_bus_i2c, \
.bus_name = ssd1306_bus_name_i2c, \
.data_cmd = {0},
#define SSD1306_DEFINE(node_id) \
static struct ssd1306_data data##node_id; \
static const struct ssd1306_config config##node_id = { \
.reset = GPIO_DT_SPEC_GET_OR(node_id, reset_gpios, {0}), \
.height = DT_PROP(node_id, height), \
.width = DT_PROP(node_id, width), \
.segment_offset = DT_PROP(node_id, segment_offset), \
.page_offset = DT_PROP(node_id, page_offset), \
.display_offset = DT_PROP(node_id, display_offset), \
.multiplex_ratio = DT_PROP(node_id, multiplex_ratio), \
.segment_remap = DT_PROP(node_id, segment_remap), \
.com_invdir = DT_PROP(node_id, com_invdir), \
.com_sequential = DT_PROP(node_id, com_sequential), \
.prechargep = DT_PROP(node_id, prechargep), \
.color_inversion = DT_PROP(node_id, inversion_on), \
.sh1106_compatible = DT_NODE_HAS_COMPAT(node_id, sinowealth_sh1106), \
.ready_time_ms = DT_PROP(node_id, ready_time_ms), \
COND_CODE_1(DT_ON_BUS(node_id, spi), (SSD1306_CONFIG_SPI(node_id)), \
(SSD1306_CONFIG_I2C(node_id))) \
}; \
\
DEVICE_DT_DEFINE(node_id, ssd1306_init, NULL, &data##node_id, &config##node_id, \
POST_KERNEL, CONFIG_DISPLAY_INIT_PRIORITY, &ssd1306_driver_api);
DT_FOREACH_STATUS_OKAY(solomon_ssd1306fb, SSD1306_DEFINE)
DT_FOREACH_STATUS_OKAY(sinowealth_sh1106, SSD1306_DEFINE)