| /* |
| * Copyright 2004-2014 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/module.h> |
| #include <linux/semaphore.h> |
| #include <linux/sched.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) |
| { |
| cam_data *cam = devid; |
| ipu_select_buffer(cam->ipu, CSI_MEM, IPU_OUTPUT_BUFFER, |
| callback_flag%2 ? 1 : 0); |
| if (callback_flag == 0) |
| ipu_enable_channel(cam->ipu, 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(cam->ipu, 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; |
| |
| 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_YUYV) |
| pixel_fmt = IPU_PIX_FMT_YUYV; |
| 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; |
| } |
| |
| memset(¶ms, 0, sizeof(params)); |
| err = ipu_init_channel(cam->ipu, CSI_MEM, ¶ms); |
| if (err != 0) |
| return err; |
| |
| err = ipu_init_channel_buffer(cam->ipu, CSI_MEM, 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, 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", cam); |
| if (err != 0) { |
| printk(KERN_ERR "Error IPU_IRQ_SENSOR_EOF\n"); |
| return err; |
| } |
| #else |
| callback_eof_flag = 0; |
| buffer_num = 0; |
| |
| ipu_clear_irq(cam->ipu, IPU_IRQ_CSI0_OUT_EOF); |
| err = ipu_request_irq(cam->ipu, IPU_IRQ_CSI0_OUT_EOF, |
| prp_still_callback, |
| 0, "Mxc Camera", cam); |
| if (err != 0) { |
| printk(KERN_ERR "Error registering irq.\n"); |
| return err; |
| } |
| |
| ipu_select_buffer(cam->ipu, CSI_MEM, IPU_OUTPUT_BUFFER, 0); |
| ipu_enable_channel(cam->ipu, CSI_MEM); |
| ipu_enable_csi(cam->ipu, 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; |
| |
| #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(cam->ipu, IPU_IRQ_CSI0_OUT_EOF, cam); |
| #endif |
| |
| ipu_disable_csi(cam->ipu, cam->csi); |
| ipu_disable_channel(cam->ipu, CSI_MEM, true); |
| ipu_uninit_channel(cam->ipu, CSI_MEM); |
| |
| 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; |
| } |
| EXPORT_SYMBOL(prp_still_select); |
| |
| /*! |
| * 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; |
| } |
| EXPORT_SYMBOL(prp_still_deselect); |
| |
| /*! |
| * 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); |
| |
| MODULE_AUTHOR("Freescale Semiconductor, Inc."); |
| MODULE_DESCRIPTION("IPU PRP STILL IMAGE Driver"); |
| MODULE_LICENSE("GPL"); |