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ipu_prp_vf_adc.c

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/*
 * Copyright 2004-2009 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_prp_vf_adc.c
 *
 * @brief IPU Use case for PRP-VF
 *
 * @ingroup IPU
 */

#include "mxc_v4l2_capture.h"
#include "ipu_prp_sw.h"
#include <mach/mxcfb.h>
#include <mach/ipu.h>
#include <linux/dma-mapping.h>

/*
 * Function definitions
 */

/*!
 * prpvf_start - start the vf task
 *
 * @param private    cam_data * mxc v4l2 main structure
 *
 */
00038 static int prpvf_start(void *private)
{
      cam_data *cam = (cam_data *) private;
      ipu_channel_params_t vf;
      ipu_channel_params_t params;
      u32 format = IPU_PIX_FMT_RGB565;
      u32 size = 2;
      int err = 0;

      if (!cam) {
            printk(KERN_ERR "prpvf_start private is NULL\n");
            return -ENXIO;
      }

      if (cam->overlay_active == true) {
            printk(KERN_ERR "prpvf_start already start.\n");
            return 0;
      }

      mxcfb_set_refresh_mode(cam->overlay_fb, MXCFB_REFRESH_OFF, 0);

      memset(&vf, 0, sizeof(ipu_channel_params_t));
      ipu_csi_get_window_size(&vf.csi_prp_vf_adc.in_width,
                        &vf.csi_prp_vf_adc.in_height);
      vf.csi_prp_vf_adc.in_pixel_fmt = IPU_PIX_FMT_UYVY;
      vf.csi_prp_vf_adc.out_width = cam->win.w.width;
      vf.csi_prp_vf_adc.out_height = cam->win.w.height;
      vf.csi_prp_vf_adc.graphics_combine_en = 0;
      vf.csi_prp_vf_adc.out_left = cam->win.w.left;

      /* hope to be removed when those offset taken cared by adc driver. */
#ifdef CONFIG_FB_MXC_EPSON_QVGA_PANEL
      vf.csi_prp_vf_adc.out_left += 12;
#endif
#ifdef CONFIG_FB_MXC_EPSON_PANEL
      vf.csi_prp_vf_adc.out_left += 2;
#endif

      vf.csi_prp_vf_adc.out_top = cam->win.w.top;

      if (cam->vf_rotation >= IPU_ROTATE_90_RIGHT) {
            vf.csi_prp_vf_adc.out_width = cam->win.w.height;
            vf.csi_prp_vf_adc.out_height = cam->win.w.width;

            size = cam->win.w.width * cam->win.w.height * size;
            vf.csi_prp_vf_adc.out_pixel_fmt = format;
            err = ipu_init_channel(CSI_PRP_VF_MEM, &vf);
            if (err != 0)
                  return err;

            ipu_csi_enable_mclk_if(CSI_MCLK_VF, cam->csi, true, true);

            if (cam->vf_bufs_vaddr[0]) {
                  dma_free_coherent(0, cam->vf_bufs_size[0],
                                cam->vf_bufs_vaddr[0],
                                cam->vf_bufs[0]);
            }
            if (cam->vf_bufs_vaddr[1]) {
                  dma_free_coherent(0, cam->vf_bufs_size[1],
                                cam->vf_bufs_vaddr[1],
                                cam->vf_bufs[1]);
            }
            cam->vf_bufs_size[0] = size;
            cam->vf_bufs_vaddr[0] = (void *)dma_alloc_coherent(0,
                                                   cam->
                                                   vf_bufs_size
                                                   [0],
                                                   &cam->
                                                   vf_bufs[0],
                                                   GFP_DMA |
                                                   GFP_KERNEL);
            if (cam->vf_bufs_vaddr[0] == NULL) {
                  printk(KERN_ERR
                         "prpvf_start: Error to allocate vf buffer\n");
                  err = -ENOMEM;
                  goto out_3;
            }
            cam->vf_bufs_size[1] = size;
            cam->vf_bufs_vaddr[1] = (void *)dma_alloc_coherent(0,
                                                   cam->
                                                   vf_bufs_size
                                                   [1],
                                                   &cam->
                                                   vf_bufs[1],
                                                   GFP_DMA |
                                                   GFP_KERNEL);
            if (cam->vf_bufs_vaddr[1] == NULL) {
                  printk(KERN_ERR
                         "prpvf_start: Error to allocate vf buffer\n");
                  err = -ENOMEM;
                  goto out_3;
            }

            err = ipu_init_channel_buffer(CSI_PRP_VF_MEM, IPU_OUTPUT_BUFFER,
                                    format,
                                    vf.csi_prp_vf_mem.out_width,
                                    vf.csi_prp_vf_mem.out_height,
                                    vf.csi_prp_vf_mem.out_width,
                                    IPU_ROTATE_NONE,
                                    cam->vf_bufs[0], cam->vf_bufs[1],
                                    0, 0);
            if (err != 0)
                  goto out_3;

            if (cam->rot_vf_bufs[0]) {
                  dma_free_coherent(0, cam->rot_vf_buf_size[0],
                                cam->rot_vf_bufs_vaddr[0],
                                cam->rot_vf_bufs[0]);
            }
            if (cam->rot_vf_bufs[1]) {
                  dma_free_coherent(0, cam->rot_vf_buf_size[1],
                                cam->rot_vf_bufs_vaddr[1],
                                cam->rot_vf_bufs[1]);
            }
            cam->rot_vf_buf_size[0] = PAGE_ALIGN(size);
            cam->rot_vf_bufs_vaddr[0] = (void *)dma_alloc_coherent(0,
                                                       cam->
                                                       rot_vf_buf_size
                                                       [0],
                                                       &cam->
                                                       rot_vf_bufs
                                                       [0],
                                                       GFP_DMA |
                                                       GFP_KERNEL);
            if (cam->rot_vf_bufs_vaddr[0] == NULL) {
                  printk(KERN_ERR
                         "prpvf_start: Error to allocate rot_vf_bufs\n");
                  err = -ENOMEM;
                  goto out_3;
            }
            cam->rot_vf_buf_size[1] = PAGE_ALIGN(size);
            cam->rot_vf_bufs_vaddr[1] = (void *)dma_alloc_coherent(0,
                                                       cam->
                                                       rot_vf_buf_size
                                                       [1],
                                                       &cam->
                                                       rot_vf_bufs
                                                       [1],
                                                       GFP_DMA |
                                                       GFP_KERNEL);
            if (cam->rot_vf_bufs_vaddr[1] == NULL) {
                  printk(KERN_ERR
                         "prpvf_start: Error to allocate rot_vf_bufs\n");
                  err = -ENOMEM;
                  goto out_3;
            }
            err = ipu_init_channel(MEM_ROT_VF_MEM, NULL);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start :Error "
                         "MEM_ROT_VF_MEM channel\n");
                  goto out_3;
            }

            err = ipu_init_channel_buffer(MEM_ROT_VF_MEM, IPU_INPUT_BUFFER,
                                    format,
                                    vf.csi_prp_vf_mem.out_width,
                                    vf.csi_prp_vf_mem.out_height,
                                    vf.csi_prp_vf_mem.out_width,
                                    cam->vf_rotation, cam->vf_bufs[0],
                                    cam->vf_bufs[1], 0, 0);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "MEM_ROT_VF_MEM input buffer\n");
                  goto out_2;
            }

            err = ipu_init_channel_buffer(MEM_ROT_VF_MEM, IPU_OUTPUT_BUFFER,
                                    format,
                                    vf.csi_prp_vf_mem.out_height,
                                    vf.csi_prp_vf_mem.out_width,
                                    vf.csi_prp_vf_mem.out_height,
                                    IPU_ROTATE_NONE,
                                    cam->rot_vf_bufs[0],
                                    cam->rot_vf_bufs[1], 0, 0);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "MEM_ROT_VF_MEM output buffer\n");
                  goto out_2;
            }

            err = ipu_link_channels(CSI_PRP_VF_MEM, MEM_ROT_VF_MEM);
            if (err < 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "linking CSI_PRP_VF_MEM-MEM_ROT_VF_MEM\n");
                  goto out_2;
            }

            ipu_disable_channel(ADC_SYS2, false);
            ipu_uninit_channel(ADC_SYS2);

            params.adc_sys2.disp = DISP0;
            params.adc_sys2.ch_mode = WriteTemplateNonSeq;
            params.adc_sys2.out_left = cam->win.w.left;
            /* going to be removed when those offset taken cared by adc driver. */
#ifdef CONFIG_FB_MXC_EPSON_QVGA_PANEL
            params.adc_sys2.out_left += 12;
#endif
#ifdef CONFIG_FB_MXC_EPSON_PANEL
            params.adc_sys2.out_left += 2;
#endif
            params.adc_sys2.out_top = cam->win.w.top;
            err = ipu_init_channel(ADC_SYS2, &params);
            if (err != 0) {
                  printk(KERN_ERR
                         "prpvf_start: Error initializing ADC SYS1\n");
                  goto out_2;
            }

            err = ipu_init_channel_buffer(ADC_SYS2, IPU_INPUT_BUFFER,
                                    format,
                                    vf.csi_prp_vf_mem.out_height,
                                    vf.csi_prp_vf_mem.out_width,
                                    vf.csi_prp_vf_mem.out_height,
                                    IPU_ROTATE_NONE,
                                    cam->rot_vf_bufs[0],
                                    cam->rot_vf_bufs[1], 0, 0);
            if (err != 0) {
                  printk(KERN_ERR "Error initializing ADC SYS1 buffer\n");
                  goto out_1;
            }

            err = ipu_link_channels(MEM_ROT_VF_MEM, ADC_SYS2);
            if (err < 0) {
                  printk(KERN_ERR
                         "Error linking MEM_ROT_VF_MEM-ADC_SYS2\n");
                  goto out_1;
            }

            ipu_enable_channel(CSI_PRP_VF_MEM);
            ipu_enable_channel(MEM_ROT_VF_MEM);
            ipu_enable_channel(ADC_SYS2);

            ipu_select_buffer(CSI_PRP_VF_MEM, IPU_OUTPUT_BUFFER, 0);
            ipu_select_buffer(CSI_PRP_VF_MEM, IPU_OUTPUT_BUFFER, 1);
            ipu_select_buffer(MEM_ROT_VF_MEM, IPU_OUTPUT_BUFFER, 0);
            ipu_select_buffer(MEM_ROT_VF_MEM, IPU_OUTPUT_BUFFER, 1);
      }
#ifndef CONFIG_MXC_IPU_PRP_VF_SDC
      else if (cam->vf_rotation == IPU_ROTATE_NONE) {
            vf.csi_prp_vf_adc.out_pixel_fmt = IPU_PIX_FMT_BGR32;
            err = ipu_init_channel(CSI_PRP_VF_ADC, &vf);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "initializing CSI_PRP_VF_ADC\n");
                  return err;
            }
            ipu_csi_enable_mclk_if(CSI_MCLK_VF, cam->csi, true, true);
            err = ipu_init_channel_buffer(CSI_PRP_VF_ADC, IPU_OUTPUT_BUFFER,
                                    format, cam->win.w.width,
                                    cam->win.w.height,
                                    cam->win.w.width, IPU_ROTATE_NONE,
                                    0, 0, 0, 0);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "initializing CSI_PRP_VF_MEM\n");
                  return err;
            }
            ipu_enable_channel(CSI_PRP_VF_ADC);
      }
#endif
      else {
            size = cam->win.w.width * cam->win.w.height * size;
            vf.csi_prp_vf_adc.out_pixel_fmt = format;
            err = ipu_init_channel(CSI_PRP_VF_MEM, &vf);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "initializing CSI_PRP_VF_MEM\n");
                  return err;
            }

            ipu_csi_enable_mclk_if(CSI_MCLK_VF, cam->csi, true, true);

            if (cam->vf_bufs[0]) {
                  dma_free_coherent(0, cam->vf_bufs_size[0],
                                cam->vf_bufs_vaddr[0],
                                cam->vf_bufs[0]);
            }
            if (cam->vf_bufs[1]) {
                  dma_free_coherent(0, cam->vf_bufs_size[1],
                                cam->vf_bufs_vaddr[1],
                                cam->vf_bufs[1]);
            }
            cam->vf_bufs_size[0] = PAGE_ALIGN(size);
            cam->vf_bufs_vaddr[0] = (void *)dma_alloc_coherent(0,
                                                   cam->
                                                   vf_bufs_size
                                                   [0],
                                                   &cam->
                                                   vf_bufs[0],
                                                   GFP_DMA |
                                                   GFP_KERNEL);
            if (cam->vf_bufs_vaddr[0] == NULL) {
                  printk(KERN_ERR
                         "prpvf_start: Error to allocate vf_bufs\n");
                  err = -ENOMEM;
                  goto out_3;
            }
            cam->vf_bufs_size[1] = PAGE_ALIGN(size);
            cam->vf_bufs_vaddr[1] = (void *)dma_alloc_coherent(0,
                                                   cam->
                                                   vf_bufs_size
                                                   [1],
                                                   &cam->
                                                   vf_bufs[1],
                                                   GFP_DMA |
                                                   GFP_KERNEL);
            if (cam->vf_bufs_vaddr[1] == NULL) {
                  printk(KERN_ERR
                         "prpvf_start: Error to allocate vf_bufs\n");
                  err = -ENOMEM;
                  goto out_3;
            }
            err = ipu_init_channel_buffer(CSI_PRP_VF_MEM, IPU_OUTPUT_BUFFER,
                                    format,
                                    vf.csi_prp_vf_mem.out_width,
                                    vf.csi_prp_vf_mem.out_height,
                                    vf.csi_prp_vf_mem.out_width,
                                    cam->vf_rotation,
                                    cam->vf_bufs[0], cam->vf_bufs[1],
                                    0, 0);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "initializing CSI_PRP_VF_MEM\n");
                  goto out_3;
            }

            ipu_disable_channel(ADC_SYS2, false);
            ipu_uninit_channel(ADC_SYS2);

            params.adc_sys2.disp = DISP0;
            params.adc_sys2.ch_mode = WriteTemplateNonSeq;
            params.adc_sys2.out_left = cam->win.w.left;
            // going to be removed when those offset taken cared by adc driver.
#ifdef CONFIG_FB_MXC_EPSON_QVGA_PANEL
            params.adc_sys2.out_left += 12;
#endif
#ifdef CONFIG_FB_MXC_EPSON_PANEL
            params.adc_sys2.out_left += 2;
#endif
            params.adc_sys2.out_top = cam->win.w.top;
            err = ipu_init_channel(ADC_SYS2, &params);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "initializing ADC_SYS2\n");
                  goto out_3;
            }

            err = ipu_init_channel_buffer(ADC_SYS2, IPU_INPUT_BUFFER,
                                    format,
                                    vf.csi_prp_vf_mem.out_width,
                                    vf.csi_prp_vf_mem.out_height,
                                    vf.csi_prp_vf_mem.out_width,
                                    IPU_ROTATE_NONE, cam->vf_bufs[0],
                                    cam->vf_bufs[1], 0, 0);
            if (err != 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "initializing ADC SYS1 buffer\n");
                  goto out_1;
            }

            err = ipu_link_channels(CSI_PRP_VF_MEM, ADC_SYS2);
            if (err < 0) {
                  printk(KERN_ERR "prpvf_start: Error "
                         "linking MEM_ROT_VF_MEM-ADC_SYS2\n");
                  goto out_1;
            }

            ipu_enable_channel(CSI_PRP_VF_MEM);
            ipu_enable_channel(ADC_SYS2);

            ipu_select_buffer(CSI_PRP_VF_MEM, IPU_OUTPUT_BUFFER, 0);
            ipu_select_buffer(CSI_PRP_VF_MEM, IPU_OUTPUT_BUFFER, 1);
      }

      cam->overlay_active = true;
      return err;

      out_1:
      ipu_uninit_channel(ADC_SYS2);
      out_2:
      if (cam->vf_rotation >= IPU_ROTATE_90_RIGHT) {
            ipu_uninit_channel(MEM_ROT_VF_MEM);
      }
      out_3:
      ipu_uninit_channel(CSI_PRP_VF_MEM);
      if (cam->rot_vf_bufs_vaddr[0]) {
            dma_free_coherent(0, cam->rot_vf_buf_size[0],
                          cam->rot_vf_bufs_vaddr[0],
                          cam->rot_vf_bufs[0]);
            cam->rot_vf_bufs_vaddr[0] = NULL;
            cam->rot_vf_bufs[0] = 0;
      }
      if (cam->rot_vf_bufs_vaddr[1]) {
            dma_free_coherent(0, cam->rot_vf_buf_size[1],
                          cam->rot_vf_bufs_vaddr[1],
                          cam->rot_vf_bufs[1]);
            cam->rot_vf_bufs_vaddr[1] = NULL;
            cam->rot_vf_bufs[1] = 0;
      }
      if (cam->vf_bufs_vaddr[0]) {
            dma_free_coherent(0, cam->vf_bufs_size[0],
                          cam->vf_bufs_vaddr[0], cam->vf_bufs[0]);
            cam->vf_bufs_vaddr[0] = NULL;
            cam->vf_bufs[0] = 0;
      }
      if (cam->vf_bufs_vaddr[1]) {
            dma_free_coherent(0, cam->vf_bufs_size[1],
                          cam->vf_bufs_vaddr[1], cam->vf_bufs[1]);
            cam->vf_bufs_vaddr[1] = NULL;
            cam->vf_bufs[1] = 0;
      }
      return err;
}

/*!
 * prpvf_stop - stop the vf task
 *
 * @param private    cam_data * mxc v4l2 main structure
 *
 */
00458 static int prpvf_stop(void *private)
{
      cam_data *cam = (cam_data *) private;
      int err = 0;

      if (cam->overlay_active == false)
            return 0;

      if (cam->vf_rotation >= IPU_ROTATE_90_RIGHT) {
            ipu_unlink_channels(CSI_PRP_VF_MEM, MEM_ROT_VF_MEM);
            ipu_unlink_channels(MEM_ROT_VF_MEM, ADC_SYS2);

            ipu_disable_channel(CSI_PRP_VF_MEM, true);
            ipu_disable_channel(MEM_ROT_VF_MEM, true);
            ipu_disable_channel(ADC_SYS2, true);

            ipu_uninit_channel(CSI_PRP_VF_MEM);
            ipu_uninit_channel(MEM_ROT_VF_MEM);
            ipu_uninit_channel(ADC_SYS2);

            ipu_csi_enable_mclk_if(CSI_MCLK_VF, cam->csi, false, false);
      }
#ifndef CONFIG_MXC_IPU_PRP_VF_SDC
      else if (cam->vf_rotation == IPU_ROTATE_NONE) {
            ipu_disable_channel(CSI_PRP_VF_ADC, false);
            ipu_uninit_channel(CSI_PRP_VF_ADC);
            ipu_csi_enable_mclk_if(CSI_MCLK_VF, cam->csi, false, false);
      }
#endif
      else {
            ipu_unlink_channels(CSI_PRP_VF_MEM, ADC_SYS2);

            ipu_disable_channel(CSI_PRP_VF_MEM, true);
            ipu_disable_channel(ADC_SYS2, true);

            ipu_uninit_channel(CSI_PRP_VF_MEM);
            ipu_uninit_channel(ADC_SYS2);

            ipu_csi_enable_mclk_if(CSI_MCLK_VF, cam->csi, false, false);
      }

      if (cam->vf_bufs_vaddr[0]) {
            dma_free_coherent(0, cam->vf_bufs_size[0],
                          cam->vf_bufs_vaddr[0], cam->vf_bufs[0]);
            cam->vf_bufs_vaddr[0] = NULL;
            cam->vf_bufs[0] = 0;
      }
      if (cam->vf_bufs_vaddr[1]) {
            dma_free_coherent(0, cam->vf_bufs_size[1],
                          cam->vf_bufs_vaddr[1], cam->vf_bufs[1]);
            cam->vf_bufs_vaddr[1] = NULL;
            cam->vf_bufs[1] = 0;
      }
      if (cam->rot_vf_bufs_vaddr[0]) {
            dma_free_coherent(0, cam->rot_vf_buf_size[0],
                          cam->rot_vf_bufs_vaddr[0],
                          cam->rot_vf_bufs[0]);
            cam->rot_vf_bufs_vaddr[0] = NULL;
            cam->rot_vf_bufs[0] = 0;
      }
      if (cam->rot_vf_bufs_vaddr[1]) {
            dma_free_coherent(0, cam->rot_vf_buf_size[1],
                          cam->rot_vf_bufs_vaddr[1],
                          cam->rot_vf_bufs[1]);
            cam->rot_vf_bufs_vaddr[1] = NULL;
            cam->rot_vf_bufs[1] = 0;
      }

      cam->overlay_active = false;

      mxcfb_set_refresh_mode(cam->overlay_fb, MXCFB_REFRESH_PARTIAL, 0);
      return err;
}

/*!
 * function to select PRP-VF as the working path
 *
 * @param private    cam_data * mxc v4l2 main structure
 *
 * @return  status
 */
00539 int prp_vf_adc_select(void *private)
{
      cam_data *cam;
      if (private) {
            cam = (cam_data *) private;
            cam->vf_start_adc = prpvf_start;
            cam->vf_stop_adc = prpvf_stop;
            cam->overlay_active = false;
      } else {
            return -EIO;
      }
      return 0;
}

/*!
 * function to de-select PRP-VF as the working path
 *
 * @param private    cam_data * mxc v4l2 main structure
 *
 * @return  status
 */
00560 int prp_vf_adc_deselect(void *private)
{
      cam_data *cam;
      int err = 0;
      err = prpvf_stop(private);

      if (private) {
            cam = (cam_data *) private;
            cam->vf_start_adc = NULL;
            cam->vf_stop_adc = NULL;
      }
      return err;
}

/*!
 * Init viewfinder task.
 *
 * @return  Error code indicating success or failure
 */
00579 __init int prp_vf_adc_init(void)
{
      return 0;
}

/*!
 * Deinit viewfinder task.
 *
 * @return  Error code indicating success or failure
 */
00589 void __exit prp_vf_adc_exit(void)
{
}

module_init(prp_vf_adc_init);
module_exit(prp_vf_adc_exit);

EXPORT_SYMBOL(prp_vf_adc_select);
EXPORT_SYMBOL(prp_vf_adc_deselect);

MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("IPU PRP VF ADC Driver");
MODULE_LICENSE("GPL");

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