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/*
* Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file ipu_still.c
*
* @brief IPU Use case for still image capture
*
* @ingroup IPU
*/
#include <linux/ipu.h>
#include <linux/semaphore.h>
#include <linux/ipu.h>
#include "mxc_v4l2_capture.h"
#include "ipu_prp_sw.h"
static int callback_eof_flag;
#ifndef CONFIG_MXC_IPU_V1
static int buffer_num;
#endif
#ifdef CONFIG_MXC_IPU_V1
static int callback_flag;
/*
* Function definitions
*/
/*!
* CSI EOF callback function.
*
* @param irq int irq line
* @param dev_id void * device id
*
* @return status IRQ_HANDLED for handled
*/
static irqreturn_t prp_csi_eof_callback(int irq, void *dev_id)
{
ipu_select_buffer(CSI_MEM, IPU_OUTPUT_BUFFER,
callback_flag%2 ? 1 : 0);
if (callback_flag == 0)
ipu_enable_channel(CSI_MEM);
callback_flag++;
return IRQ_HANDLED;
}
#endif
/*!
* CSI callback function.
*
* @param irq int irq line
* @param dev_id void * device id
*
* @return status IRQ_HANDLED for handled
*/
static irqreturn_t prp_still_callback(int irq, void *dev_id)
{
cam_data *cam = (cam_data *) dev_id;
callback_eof_flag++;
if (callback_eof_flag < 5) {
#ifndef CONFIG_MXC_IPU_V1
buffer_num = (buffer_num == 0) ? 1 : 0;
ipu_select_buffer(CSI_MEM, IPU_OUTPUT_BUFFER, buffer_num);
#endif
} else {
cam->still_counter++;
wake_up_interruptible(&cam->still_queue);
}
return IRQ_HANDLED;
}
/*!
* start csi->mem task
* @param private struct cam_data * mxc capture instance
*
* @return status
*/
static int prp_still_start(void *private)
{
cam_data *cam = (cam_data *) private;
u32 pixel_fmt;
int err;
ipu_channel_params_t params;
ipu_channel_t channel;
int ipu_irq_csi_out_eof;
if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
pixel_fmt = IPU_PIX_FMT_YUV420P;
else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_NV12)
pixel_fmt = IPU_PIX_FMT_NV12;
else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_YUV422P)
pixel_fmt = IPU_PIX_FMT_YUV422P;
else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_UYVY)
pixel_fmt = IPU_PIX_FMT_UYVY;
else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_BGR24)
pixel_fmt = IPU_PIX_FMT_BGR24;
else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB24)
pixel_fmt = IPU_PIX_FMT_RGB24;
else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB565)
pixel_fmt = IPU_PIX_FMT_RGB565;
else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_BGR32)
pixel_fmt = IPU_PIX_FMT_BGR32;
else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB32)
pixel_fmt = IPU_PIX_FMT_RGB32;
else {
printk(KERN_ERR "format not supported\n");
return -EINVAL;
}
ipu_csi_enable_mclk_if(CSI_MCLK_RAW, cam->csi, true, true);
if (cam->csi == 0) {
channel = CSI_MEM0;
ipu_irq_csi_out_eof = IPU_IRQ_CSI0_OUT_EOF;
}
else {
channel = CSI_MEM1;
ipu_irq_csi_out_eof = IPU_IRQ_CSI1_OUT_EOF;
}
memset(¶ms, 0, sizeof(params));
params.csi_mem.csi = cam->csi;
err = ipu_init_channel(channel, ¶ms);
if (err != 0)
return err;
err = ipu_init_channel_buffer(channel, IPU_OUTPUT_BUFFER,
pixel_fmt, cam->v2f.fmt.pix.width,
cam->v2f.fmt.pix.height,
cam->v2f.fmt.pix.width, IPU_ROTATE_NONE,
cam->still_buf[0], cam->still_buf[1],
0, 0);
if (err != 0)
return err;
#ifdef CONFIG_MXC_IPU_V1
ipu_clear_irq(IPU_IRQ_SENSOR_OUT_EOF);
err = ipu_request_irq(IPU_IRQ_SENSOR_OUT_EOF, prp_still_callback,
0, "Mxc Camera", cam);
if (err != 0) {
printk(KERN_ERR "Error registering irq.\n");
return err;
}
callback_flag = 0;
callback_eof_flag = 0;
ipu_clear_irq(IPU_IRQ_SENSOR_EOF);
err = ipu_request_irq(IPU_IRQ_SENSOR_EOF, prp_csi_eof_callback,
0, "Mxc Camera", NULL);
if (err != 0) {
printk(KERN_ERR "Error IPU_IRQ_SENSOR_EOF \n");
return err;
}
#else
ipu_clear_irq(ipu_irq_csi_out_eof);
err = ipu_request_irq(ipu_irq_csi_out_eof, prp_still_callback,
0, "Mxc Camera", cam);
if (err != 0) {
printk(KERN_ERR "Error registering irq.\n");
return err;
}
callback_eof_flag = 0;
ipu_select_buffer(channel, IPU_OUTPUT_BUFFER, 0);
ipu_enable_channel(channel);
ipu_enable_csi(cam->csi);
#endif
return err;
}
/*!
* stop csi->mem encoder task
* @param private struct cam_data * mxc capture instance
*
* @return status
*/
static int prp_still_stop(void *private)
{
cam_data *cam = (cam_data *) private;
int err = 0;
ipu_channel_t channel;
int ipu_irq_csi_out_eof;
if (cam->csi == 0) {
channel = CSI_MEM0;
ipu_irq_csi_out_eof = IPU_IRQ_CSI0_OUT_EOF;
}
else {
channel = CSI_MEM1;
ipu_irq_csi_out_eof = IPU_IRQ_CSI1_OUT_EOF;
}
#ifdef CONFIG_MXC_IPU_V1
ipu_free_irq(IPU_IRQ_SENSOR_EOF, NULL);
ipu_free_irq(IPU_IRQ_SENSOR_OUT_EOF, cam);
#else
ipu_free_irq(ipu_irq_csi_out_eof, cam);
#endif
ipu_disable_csi(cam->csi);
ipu_disable_channel(channel, true);
ipu_uninit_channel(channel);
ipu_csi_enable_mclk_if(CSI_MCLK_RAW, cam->csi, false, false);
return err;
}
/*!
* function to select CSI_MEM as the working path
*
* @param private struct cam_data * mxc capture instance
*
* @return status
*/
int prp_still_select(void *private)
{
cam_data *cam = (cam_data *) private;
if (cam) {
cam->csi_start = prp_still_start;
cam->csi_stop = prp_still_stop;
}
return 0;
}
/*!
* function to de-select CSI_MEM as the working path
*
* @param private struct cam_data * mxc capture instance
*
* @return status
*/
int prp_still_deselect(void *private)
{
cam_data *cam = (cam_data *) private;
int err = 0;
err = prp_still_stop(cam);
if (cam) {
cam->csi_start = NULL;
cam->csi_stop = NULL;
}
return err;
}
/*!
* Init the Encorder channels
*
* @return Error code indicating success or failure
*/
__init int prp_still_init(void)
{
return 0;
}
/*!
* Deinit the Encorder channels
*
*/
void __exit prp_still_exit(void)
{
}
module_init(prp_still_init);
module_exit(prp_still_exit);
EXPORT_SYMBOL(prp_still_select);
EXPORT_SYMBOL(prp_still_deselect);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("IPU PRP STILL IMAGE Driver");
MODULE_LICENSE("GPL");
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