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drivers: video: Add MCUX CSI video driver

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Add support for CMOS Sensor Interface video driver.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
This commit is contained in:
Loic Poulain 2019-07-01 14:41:19 +02:00 • committed by Maureen Helm
commit 43e58aed34
7 changed files with 516 additions and 0 deletions
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1
drivers/CMakeLists.txt
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@ -35,6 +35,7 @@ add_subdirectory_if_kconfig(hwinfo)
add_subdirectory_if_kconfig(espi)
add_subdirectory_if_kconfig(ps2)
add_subdirectory_if_kconfig(kscan)
add_subdirectory_if_kconfig(video)
add_subdirectory_ifdef(CONFIG_FLASH_HAS_DRIVER_ENABLED flash)
add_subdirectory_ifdef(CONFIG_SERIAL_HAS_DRIVER serial)

2
drivers/Kconfig
View file

@ -89,4 +89,6 @@ source "drivers/ps2/Kconfig"
source "drivers/kscan/Kconfig"
source "drivers/video/Kconfig"
endmenu

7
drivers/video/CMakeLists.txt Normal file
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@ -0,0 +1,7 @@
# SPDX-License-Identifier: Apache-2.0
zephyr_library()
zephyr_library_sources(video_common.c)
zephyr_library_sources_ifdef(CONFIG_VIDEO_MCUX_CSI video_mcux_csi.c)

33
drivers/video/Kconfig Normal file
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@ -0,0 +1,33 @@
# Kconfig - VIDEO driver configuration options
#
# Copyright (c) 2019 Linaro Limited
#
# SPDX-License-Identifier: Apache-2.0
#
#
# VIDEO Drivers
#
menuconfig VIDEO
bool "VIDEO hardware support"
help
Enable support for the VIDEO.
if VIDEO
config VIDEO_BUFFER_POOL_SZ_MAX
int "Size of the largest buffer in the video pool"
default 1048576
config VIDEO_BUFFER_POOL_NUM_MAX
int "Number of maximum sized buffer in the video pool"
default 2
config VIDEO_BUFFER_POOL_ALIGN
int "Alignment of the video pool’s buffer"
default 64
source "drivers/video/Kconfig.mcux_csi"
endif # VIDEO

11
drivers/video/Kconfig.mcux_csi Normal file
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@ -0,0 +1,11 @@
# Kconfig - NXP MCUX CSI driver configuration options
#
# Copyright (c) 2019, Linaro Limited
#
# SPDX-License-Identifier: Apache-2.0
#
menuconfig VIDEO_MCUX_CSI
bool "NXP MCUX CMOS Sensor Interface (CSI) driver"
depends on HAS_MCUX_CSI

51
drivers/video/video_common.c Normal file
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@ -0,0 +1,51 @@
/*
* Copyright (c) 2019, Linaro Limited
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <drivers/video.h>
K_MEM_POOL_DEFINE(video_buffer_pool,
CONFIG_VIDEO_BUFFER_POOL_ALIGN,
CONFIG_VIDEO_BUFFER_POOL_SZ_MAX,
CONFIG_VIDEO_BUFFER_POOL_NUM_MAX,
CONFIG_VIDEO_BUFFER_POOL_ALIGN);
static struct video_buffer video_buf[CONFIG_VIDEO_BUFFER_POOL_NUM_MAX];
struct video_buffer *video_buffer_alloc(size_t size)
{
struct video_buffer *vbuf = NULL;
int i;
/* find available video buffer */
for (i = 0; i < ARRAY_SIZE(video_buf); i++) {
if (video_buf[i].buffer == NULL) {
vbuf = &video_buf[i];
break;
}
}
if (vbuf == NULL) {
return NULL;
}
/* Alloc buffer memory */
vbuf->buffer = k_mem_pool_malloc(&video_buffer_pool, size);
if (vbuf->buffer == NULL) {
return NULL;
}
vbuf->size = size;
vbuf->bytesused = 0;
return vbuf;
}
void video_buffer_release(struct video_buffer *vbuf)
{
k_free(vbuf->buffer);
vbuf->buffer = NULL;
}

411
drivers/video/video_mcux_csi.c Normal file
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@ -0,0 +1,411 @@
/*
* Copyright (c) 2019, Linaro Limited
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <fsl_csi.h>
#ifdef CONFIG_HAS_MCUX_CACHE
#include <fsl_cache.h>
#endif
#include <drivers/video.h>
struct video_mcux_csi_config {
CSI_Type *base;
char *sensor_label;
};
struct video_mcux_csi_data {
struct device *sensor_dev;
csi_config_t csi_config;
csi_handle_t csi_handle;
struct k_fifo fifo_in;
struct k_fifo fifo_out;
u32_t pixelformat;
struct k_poll_signal *signal;
};
static inline unsigned int video_pix_fmt_bpp(u32_t pixelformat)
{
switch (pixelformat) {
case VIDEO_PIX_FMT_BGGR8:
case VIDEO_PIX_FMT_GBRG8:
case VIDEO_PIX_FMT_GRBG8:
case VIDEO_PIX_FMT_RGGB8:
return 1;
case VIDEO_PIX_FMT_RGB565:
return 2;
default:
return 0;
}
}
static void __frame_done_cb(CSI_Type *base, csi_handle_t *handle,
status_t status, void *user_data)
{
struct device *dev = user_data;
const struct video_mcux_csi_config *config = dev->config->config_info;
struct video_mcux_csi_data *data = dev->driver_data;
enum video_signal_result result = VIDEO_BUF_DONE;
struct video_buffer *vbuf;
u32_t buffer_addr;
/* IRQ context */
if (status != kStatus_CSI_FrameDone) {
return;
}
status = CSI_TransferGetFullBuffer(config->base, &(data->csi_handle),
&buffer_addr);
if (status != kStatus_Success) {
result = VIDEO_BUF_ERROR;
goto done;
}
/* Get matching vbuf by addr */
while ((vbuf = k_fifo_get(&data->fifo_in, K_NO_WAIT))) {
if ((u32_t)vbuf->buffer == buffer_addr) {
break;
}
/* should never happen on ordered stream, requeue and break */
k_fifo_put(&data->fifo_in, vbuf);
vbuf = NULL;
break;
}
if (vbuf == NULL) {
result = VIDEO_BUF_ERROR;
goto done;
}
vbuf->timestamp = k_uptime_get_32();
#ifdef CONFIG_HAS_MCUX_CACHE
DCACHE_InvalidateByRange(buffer_addr, vbuf->bytesused);
#endif
k_fifo_put(&data->fifo_out, vbuf);
done:
/* Trigger Event */
if (data->signal) {
k_poll_signal_raise(data->signal, result);
}
}
static int video_mcux_csi_set_fmt(struct device *dev, enum video_endpoint_id ep,
struct video_format *fmt)
{
const struct video_mcux_csi_config *config = dev->config->config_info;
struct video_mcux_csi_data *data = dev->driver_data;
unsigned int bpp = video_pix_fmt_bpp(fmt->pixelformat);
status_t ret;
if (!bpp || ep != VIDEO_EP_OUT) {
return -EINVAL;
}
data->pixelformat = fmt->pixelformat;
data->csi_config.bytesPerPixel = bpp;
data->csi_config.linePitch_Bytes = fmt->pitch;
data->csi_config.polarityFlags = kCSI_HsyncActiveHigh | kCSI_DataLatchOnRisingEdge;
data->csi_config.workMode = kCSI_GatedClockMode; /* use VSYNC, HSYNC, and PIXCLK */
data->csi_config.dataBus = kCSI_DataBus8Bit;
data->csi_config.useExtVsync = true;
data->csi_config.height = fmt->height;
data->csi_config.width = fmt->width;
ret = CSI_Init(config->base, &data->csi_config);
if (ret != kStatus_Success) {
return -EIO;
}
ret = CSI_TransferCreateHandle(config->base, &data->csi_handle,
__frame_done_cb, dev);
if (ret != kStatus_Success) {
return -EIO;
}
if (data->sensor_dev && video_set_format(data->sensor_dev, ep, fmt)) {
return -EIO;
}
return 0;
}
static int video_mcux_csi_get_fmt(struct device *dev, enum video_endpoint_id ep,
struct video_format *fmt)
{
struct video_mcux_csi_data *data = dev->driver_data;
if (fmt == NULL || ep != VIDEO_EP_OUT) {
return -EINVAL;
}
if (data->sensor_dev && !video_get_format(data->sensor_dev, ep, fmt)) {
/* align CSI with sensor fmt */
return video_mcux_csi_set_fmt(dev, ep, fmt);
}
fmt->pixelformat = data->pixelformat;
fmt->height = data->csi_config.height;
fmt->width = data->csi_config.width;
fmt->pitch = data->csi_config.linePitch_Bytes;
return 0;
}
static int video_mcux_csi_stream_start(struct device *dev)
{
const struct video_mcux_csi_config *config = dev->config->config_info;
struct video_mcux_csi_data *data = dev->driver_data;
status_t ret;
ret = CSI_TransferStart(config->base, &data->csi_handle);
if (ret != kStatus_Success) {
return -EIO;
}
if (data->sensor_dev && video_stream_start(data->sensor_dev)) {
return -EIO;
}
return 0;
}
static int video_mcux_csi_stream_stop(struct device *dev)
{
const struct video_mcux_csi_config *config = dev->config->config_info;
struct video_mcux_csi_data *data = dev->driver_data;
status_t ret;
if (data->sensor_dev && video_stream_stop(data->sensor_dev)) {
return -EIO;
}
ret = CSI_TransferStop(config->base, &data->csi_handle);
if (ret != kStatus_Success) {
return -EIO;
}
return 0;
}
static int video_mcux_csi_flush(struct device *dev, enum video_endpoint_id ep,
bool cancel)
{
const struct video_mcux_csi_config *config = dev->config->config_info;
struct video_mcux_csi_data *data = dev->driver_data;
struct video_buf *vbuf;
u32_t buffer_addr;
status_t ret;
if (!cancel) {
/* wait for all buffer to be processed */
do {
k_sleep(1);
} while (!k_fifo_is_empty(&data->fifo_in));
} else {
/* Flush driver ouput queue */
do {
ret = CSI_TransferGetFullBuffer(config->base,
&(data->csi_handle),
&buffer_addr);
} while (ret == kStatus_Success);
while ((vbuf = k_fifo_get(&data->fifo_in, K_NO_WAIT))) {
k_fifo_put(&data->fifo_out, vbuf);
if (data->signal) {
k_poll_signal_raise(data->signal,
VIDEO_BUF_ABORTED);
}
}
}
return 0;
}
static int video_mcux_csi_enqueue(struct device *dev, enum video_endpoint_id ep,
struct video_buffer *vbuf)
{
const struct video_mcux_csi_config *config = dev->config->config_info;
struct video_mcux_csi_data *data = dev->driver_data;
unsigned int to_read;
status_t ret;
if (ep != VIDEO_EP_OUT) {
return -EINVAL;
}
to_read = data->csi_config.linePitch_Bytes * data->csi_config.height;
vbuf->bytesused = to_read;
ret = CSI_TransferSubmitEmptyBuffer(config->base, &data->csi_handle,
(u32_t)vbuf->buffer);
if (ret != kStatus_Success) {
return -EIO;
}
k_fifo_put(&data->fifo_in, vbuf);
return 0;
}
static int video_mcux_csi_dequeue(struct device *dev, enum video_endpoint_id ep,
struct video_buffer **vbuf,
u32_t timeout)
{
struct video_mcux_csi_data *data = dev->driver_data;
if (ep != VIDEO_EP_OUT) {
return -EINVAL;
}
*vbuf = k_fifo_get(&data->fifo_out, timeout);
if (*vbuf == NULL) {
return -EAGAIN;
}
return 0;
}
static inline int video_mcux_csi_set_ctrl(struct device *dev, unsigned int cid,
void *value)
{
struct video_mcux_csi_data *data = dev->driver_data;
int ret = -ENOTSUP;
/* Forward to sensor dev if any */
if (data->sensor_dev) {
ret = video_set_ctrl(data->sensor_dev, cid, value);
}
return ret;
}
static inline int video_mcux_csi_get_ctrl(struct device *dev, unsigned int cid,
void *value)
{
struct video_mcux_csi_data *data = dev->driver_data;
int ret = -ENOTSUP;
/* Forward to sensor dev if any */
if (data->sensor_dev) {
ret = video_get_ctrl(data->sensor_dev, cid, value);
}
return ret;
}
static int video_mcux_csi_get_caps(struct device *dev,
enum video_endpoint_id ep,
struct video_caps *caps)
{
struct video_mcux_csi_data *data = dev->driver_data;
int err = -ENODEV;
if (ep != VIDEO_EP_OUT) {
return -EINVAL;
}
/* Just forward to sensor dev for now */
if (data->sensor_dev) {
err = video_get_caps(data->sensor_dev, ep, caps);
}
/* NXP MCUX CSI request at least 2 buffer before starting */
caps->min_vbuf_count = 2;
/* no sensor dev */
return err;
}
extern void CSI_DriverIRQHandler(void);
static void video_mcux_csi_isr(void *p)
{
ARG_UNUSED(p);
CSI_DriverIRQHandler();
}
static int video_mcux_csi_init(struct device *dev)
{
const struct video_mcux_csi_config *config = dev->config->config_info;
struct video_mcux_csi_data *data = dev->driver_data;
k_fifo_init(&data->fifo_in);
k_fifo_init(&data->fifo_out);
CSI_GetDefaultConfig(&data->csi_config);
/* check if there is any sensor device (video ctrl device) */
if (config->sensor_label) {
data->sensor_dev = device_get_binding(config->sensor_label);
if (data->sensor_dev == NULL) {
return -ENODEV;
}
}
return 0;
}
static int video_mcux_csi_set_signal(struct device *dev,
enum video_endpoint_id ep,
struct k_poll_signal *signal)
{
struct video_mcux_csi_data *data = dev->driver_data;
if (data->signal && signal != NULL) {
return -EALREADY;
}
data->signal = signal;
return 0;
}
static const struct video_driver_api video_mcux_csi_driver_api = {
.set_format = video_mcux_csi_set_fmt,
.get_format = video_mcux_csi_get_fmt,
.stream_start = video_mcux_csi_stream_start,
.stream_stop = video_mcux_csi_stream_stop,
.flush = video_mcux_csi_flush,
.enqueue = video_mcux_csi_enqueue,
.dequeue = video_mcux_csi_dequeue,
.set_ctrl = video_mcux_csi_set_ctrl,
.get_ctrl = video_mcux_csi_get_ctrl,
.get_caps = video_mcux_csi_get_caps,
.set_signal = video_mcux_csi_set_signal,
};
#if 1 /* Unique Instance */
static const struct video_mcux_csi_config video_mcux_csi_config_0 = {
.base = (CSI_Type *)DT_VIDEO_MCUX_CSI_BASE_ADDRESS,
.sensor_label = DT_VIDEO_MCUX_CSI_SENSOR_NAME,
};
static struct video_mcux_csi_data video_mcux_csi_data_0;
static int video_mcux_csi_init_0(struct device *dev)
{
IRQ_CONNECT(DT_VIDEO_MCUX_CSI_IRQ, DT_VIDEO_MCUX_CSI_IRQ_PRI,
video_mcux_csi_isr, NULL, 0);
irq_enable(DT_VIDEO_MCUX_CSI_IRQ);
video_mcux_csi_init(dev);
return 0;
}
DEVICE_AND_API_INIT(video_mcux_csi, DT_VIDEO_MCUX_CSI_NAME,
&video_mcux_csi_init_0, &video_mcux_csi_data_0,
&video_mcux_csi_config_0,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&video_mcux_csi_driver_api);
#endif