/* * Copyright 2004-2007 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_sdc.c * * @brief IPU Use case for PRP-VF * * @ingroup IPU */#include "mxc_v4l2_capture.h"#include <asm/arch/ipu.h>#include "ipu_prp_sw.h"#include <linux/dma-mapping.h>/* * Function definitions *//*! * prpvf_start - start the vf task * * @param private    cam_data * mxc v4l2 main structure * */static int prpvf_start(void *private){	cam_data *cam = (cam_data *) private;	ipu_channel_params_t vf;	u32 format = IPU_PIX_FMT_RGB565;	u32 size = 2;	int err = 0;	if (!cam) {		printk(KERN_ERR "private is NULL\n");		return -EIO;	}	if (cam->overlay_active == true) {		pr_debug("already started.\n");		return 0;	}	memset(&vf, 0, sizeof(ipu_channel_params_t));	ipu_csi_get_window_size(&vf.csi_prp_vf_mem.in_width,				&vf.csi_prp_vf_mem.in_height);	vf.csi_prp_vf_mem.in_pixel_fmt = IPU_PIX_FMT_UYVY;	vf.csi_prp_vf_mem.out_width = cam->win.w.width;	vf.csi_prp_vf_mem.out_height = cam->win.w.height;	if (cam->rotation >= IPU_ROTATE_90_RIGHT) {		vf.csi_prp_vf_mem.out_width = cam->win.w.height;		vf.csi_prp_vf_mem.out_height = cam->win.w.width;	}	vf.csi_prp_vf_mem.out_pixel_fmt = format;	size = cam->win.w.width * cam->win.w.height * size;	//ipu_uninit_channel(CSI_PRP_VF_MEM);	err = ipu_init_channel(CSI_PRP_VF_MEM, &vf);	if (err != 0)		goto out_4;	ipu_csi_enable_mclk(CSI_MCLK_VF, true, true);	if (cam->vf_bufs_vaddr[0]) {		dma_free_coherent(0, cam->vf_bufs_size[0],				  cam->vf_bufs_vaddr[0],				  (dma_addr_t) cam->vf_bufs[0]);	}	if (cam->vf_bufs_vaddr[1]) {		dma_free_coherent(0, cam->vf_bufs_size[1],				  cam->vf_bufs_vaddr[1],				  (dma_addr_t) 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],							   (dma_addr_t *) &							   cam->vf_bufs[0],							   GFP_DMA |							   GFP_KERNEL);	if (cam->vf_bufs_vaddr[0] == NULL) {		printk(KERN_ERR "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],							   (dma_addr_t *) &							   cam->vf_bufs[1],							   GFP_DMA |							   GFP_KERNEL);	if (cam->vf_bufs_vaddr[1] == NULL) {		printk(KERN_ERR "Error to allocate vf buffer\n");		err = -ENOMEM;		goto out_3;	}	pr_debug("vf_bufs %x %x\n", cam->vf_bufs[0], cam->vf_bufs[1]);	if (cam->rotation >= IPU_ROTATE_90_RIGHT) {		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],					  (dma_addr_t) cam->rot_vf_bufs[0]);			cam->rot_vf_bufs_vaddr[0] = NULL;			cam->rot_vf_bufs[0] = 0;		}		if (cam->rot_vf_bufs[1]) {			dma_free_coherent(0, cam->rot_vf_buf_size[1],					  cam->rot_vf_bufs_vaddr[1],					  (dma_addr_t) cam->rot_vf_bufs[1]);			cam->rot_vf_bufs_vaddr[1] = NULL;			cam->rot_vf_bufs[1] = 0;		}		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 "alloc 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								       [0],								       &cam->								       rot_vf_bufs								       [1],								       GFP_DMA |								       GFP_KERNEL);		if (cam->rot_vf_bufs_vaddr[1] == NULL) {			printk(KERN_ERR "alloc rot_vf_bufs.\n");			err = -ENOMEM;			goto out_3;		}		pr_debug("rot_vf_bufs %x %x\n", cam->rot_vf_bufs[0],			 cam->rot_vf_bufs[1]);		//ipu_uninit_channel(MEM_ROT_VF_MEM);		err = ipu_init_channel(MEM_ROT_VF_MEM, NULL);		if (err != 0) {			printk(KERN_ERR "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->rotation, cam->vf_bufs[0],					      cam->vf_bufs[1], 0, 0);		if (err != 0) {			printk(KERN_ERR "Error MEM_ROT_VF_MEM input buffer\n");			goto out_3;		}		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 "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			       "Error link CSI_PRP_VF_MEM-MEM_ROT_VF_MEM\n");			goto out_2;		}		//ipu_uninit_channel(MEM_SDC_FG);		err = ipu_init_channel(MEM_SDC_FG, NULL);		if (err != 0)			goto out_2;		ipu_sdc_set_window_pos(MEM_SDC_FG, cam->win.w.left,				       cam->win.w.top);		err = ipu_init_channel_buffer(MEM_SDC_FG, 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 SDC FG buffer\n");			goto out_2;		}		err = ipu_link_channels(MEM_ROT_VF_MEM, MEM_SDC_FG);		if (err < 0) {			printk(KERN_ERR			       "Error link MEM_ROT_VF_MEM-MEM_SDC_FG\n");			goto out_1;		}		ipu_enable_channel(CSI_PRP_VF_MEM);		ipu_enable_channel(MEM_ROT_VF_MEM);		ipu_enable_channel(MEM_SDC_FG);		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);	} else {		err = ipu_init_channel_buffer(CSI_PRP_VF_MEM, IPU_OUTPUT_BUFFER,					      format, cam->win.w.width,					      cam->win.w.height,					      cam->win.w.width, cam->rotation,					      cam->vf_bufs[0], cam->vf_bufs[1],					      0, 0);		if (err != 0) {			printk(KERN_ERR "Error initializing CSI_PRP_VF_MEM\n");			goto out_4;		}		//ipu_uninit_channel(MEM_SDC_FG);		err = ipu_init_channel(MEM_SDC_FG, NULL);		if (err != 0)			goto out_3;		ipu_sdc_set_window_pos(MEM_SDC_FG, cam->win.w.left,				       cam->win.w.top);		err = ipu_init_channel_buffer(MEM_SDC_FG,					      IPU_INPUT_BUFFER, format,					      cam->win.w.width,					      cam->win.w.height,					      cam->win.w.width, IPU_ROTATE_NONE,					      cam->vf_bufs[0], cam->vf_bufs[1],					      0, 0);		if (err != 0) {			printk(KERN_ERR "Error initializing SDC FG buffer\n");			goto out_1;		}		err = ipu_link_channels(CSI_PRP_VF_MEM, MEM_SDC_FG);		if (err < 0) {			printk(KERN_ERR "Error linking ipu channels\n");			goto out_1;		}		ipu_enable_channel(CSI_PRP_VF_MEM);		ipu_enable_channel(MEM_SDC_FG);		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(MEM_SDC_FG);      out_2:	if (cam->rotation >= IPU_ROTATE_90_RIGHT) {		ipu_uninit_channel(MEM_ROT_VF_MEM);	}      out_3:	ipu_uninit_channel(CSI_PRP_VF_MEM);      out_4:	if (cam->vf_bufs_vaddr[0]) {		dma_free_coherent(0, cam->vf_bufs_size[0],				  cam->vf_bufs_vaddr[0],				  (dma_addr_t) 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],				  (dma_addr_t) 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],				  (dma_addr_t) 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],				  (dma_addr_t) cam->rot_vf_bufs[1]);		cam->rot_vf_bufs_vaddr[1] = NULL;		cam->rot_vf_bufs[1] = 0;	}	return err;}/*! * prpvf_stop - stop the vf task * * @param private    cam_data * mxc v4l2 main structure * */static int prpvf_stop(void *private){	cam_data *cam = (cam_data *) private;	int err = 0;	if (cam->overlay_active == false)		return 0;	if (cam->rotation >= IPU_ROTATE_90_RIGHT) {		ipu_unlink_channels(CSI_PRP_VF_MEM, MEM_ROT_VF_MEM);		ipu_unlink_channels(MEM_ROT_VF_MEM, MEM_SDC_FG);	} else {		ipu_unlink_channels(CSI_PRP_VF_MEM, MEM_SDC_FG);	}	ipu_disable_channel(MEM_SDC_FG, true);	ipu_disable_channel(CSI_PRP_VF_MEM, true);	ipu_uninit_channel(CSI_PRP_VF_MEM);	if (cam->rotation >= IPU_ROTATE_90_RIGHT) {		ipu_uninit_channel(MEM_ROT_VF_MEM);	}	ipu_uninit_channel(MEM_SDC_FG);	ipu_csi_enable_mclk(CSI_MCLK_VF, false, false);	if (cam->rotation >= IPU_ROTATE_90_RIGHT) {		ipu_disable_channel(MEM_ROT_VF_MEM, true);	}	if (cam->vf_bufs_vaddr[0]) {		dma_free_coherent(0, cam->vf_bufs_size[0],				  cam->vf_bufs_vaddr[0],				  (dma_addr_t) 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],				  (dma_addr_t) 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],				  (dma_addr_t) 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],				  (dma_addr_t) cam->rot_vf_bufs[1]);		cam->rot_vf_bufs_vaddr[1] = NULL;		cam->rot_vf_bufs[1] = 0;	}	cam->overlay_active = false;	return err;}/*! * function to select PRP-VF as the working path * * @param private    cam_data * mxc v4l2 main structure * * @return  status */int prp_vf_sdc_select(void *private){	cam_data *cam;	int err = 0;	if (private) {		cam = (cam_data *) private;		cam->vf_start_sdc = prpvf_start;		cam->vf_stop_sdc = prpvf_stop;		cam->overlay_active = false;	} else		err = -EIO;	return err;}/*! * function to de-select PRP-VF as the working path * * @param private    cam_data * mxc v4l2 main structure * * @return  int */int prp_vf_sdc_deselect(void *private){	cam_data *cam;	int err = 0;	err = prpvf_stop(private);	if (private) {		cam = (cam_data *) private;		cam->vf_start_sdc = NULL;		cam->vf_stop_sdc = NULL;	}	return err;}/*! * Init viewfinder task. * * @return  Error code indicating success or failure */__init int prp_vf_sdc_init(void){	return 0;}/*! * Deinit viewfinder task. * * @return  Error code indicating success or failure */void __exit prp_vf_sdc_exit(void){}module_init(prp_vf_sdc_init);module_exit(prp_vf_sdc_exit);EXPORT_SYMBOL(prp_vf_sdc_select);EXPORT_SYMBOL(prp_vf_sdc_deselect);MODULE_AUTHOR("Freescale Semiconductor, Inc.");MODULE_DESCRIPTION("IPU PRP VF SDC Driver");MODULE_LICENSE("GPL");