mx27_prpsw.c

freescale mx27 的TVP5150的源代码

 */
static int prp_rot_mem_alloc(cam_data * cam)
{
	int i;

	for (i = 0; i < 2; i++) {
		cam->rot_vf_buf_size[i] =
		    cam->win.w.width * cam->win.w.height * 2;
		cam->rot_vf_bufs_vaddr[i] =
		    dma_alloc_coherent(0, cam->rot_vf_buf_size[i],
				       &cam->rot_vf_bufs[i],
				       GFP_DMA | GFP_KERNEL);
		if (!cam->rot_vf_bufs_vaddr[i]) {
			pr_debug("Failed to alloc memory for vf rotation.\n");
			prp_rot_mem_free(cam);
			return -1;
		}

		g_vaddr_rotbuf[i] =
		    ioremap_cached(cam->rot_vf_bufs[i],
				   cam->rot_vf_buf_size[i]);
		if (!g_vaddr_rotbuf[i]) {
			pr_debug
			    ("Failed to ioremap_cached() for rotation buffer.\n");
			prp_rot_mem_free(cam);
			return -1;
		}
	}

	return 0;
}

/*!
 * @brief Free intermedaite memory for overlay rotation/mirroring.
 * @param cam	Pointer to cam_data structure
 * @return	Zero on success, others on failure
 */
static void prp_rot_mem_free(cam_data * cam)
{
	int i;

	for (i = 0; i < 2; i++) {
		if (cam->rot_vf_bufs_vaddr[i]) {
			dma_free_coherent(0,
					  cam->rot_vf_buf_size[i],
					  cam->rot_vf_bufs_vaddr[i],
					  cam->rot_vf_bufs[i]);
		}
		cam->rot_vf_bufs[i] = 0;
		cam->rot_vf_bufs_vaddr[i] = 0;
		cam->rot_vf_buf_size[i] = 0;
		if (g_vaddr_rotbuf[i]) {
			iounmap(g_vaddr_rotbuf[i]);
			g_vaddr_rotbuf[i] = 0;
		}
	}
}

/*!
 * @brief Start overlay (view finder).
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
static int prp_vf_start(void *private)
{
	cam_data *cam = (cam_data *) private;

	if (cam->v4l2_fb.flags == V4L2_FBUF_FLAG_OVERLAY) {
		prp_vf_mem_free(cam);
		if (prp_vf_mem_alloc(cam)) {
			pr_info("Error to allocate vf buffer\n");
			return -ENOMEM;
		}
	}

	if (cam->rotation != V4L2_MXC_ROTATE_NONE) {
		prp_rot_mem_free(cam);
		if (prp_rot_mem_alloc(cam)) {
			pr_info("Error to allocate rotation buffer\n");
			prp_vf_mem_free(cam);
			return -ENOMEM;
		}
	}

	if (prp_v4l2_cfg(&g_prp_cfg, cam)) {
		prp_vf_mem_free(cam);
		prp_rot_mem_free(cam);
		return -1;
	}

	csi_enable_mclk(CSI_MCLK_VF, true, true);
	prphw_reset();

	if (prphw_cfg(&g_prp_cfg)) {
		prp_vf_mem_free(cam);
		prp_rot_mem_free(cam);
		return -1;
	}
	g_vfbuf = g_rotbuf = 0;
	tasklet_init(&prp_vf_tasklet, rotation, (unsigned long)private);

	prphw_enable(cam->capture_on ? (PRP_CHANNEL_1 | PRP_CHANNEL_2)
		     : PRP_CHANNEL_1);

	return 0;
}

/*!
 * @brief Stop overlay (view finder).
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
static int prp_vf_stop(void *private)
{
	cam_data *cam = (cam_data *) private;

	prphw_disable(PRP_CHANNEL_1);

	csi_enable_mclk(CSI_MCLK_VF, false, false);
	tasklet_kill(&prp_vf_tasklet);

	if (cam->v4l2_fb.flags == V4L2_FBUF_FLAG_OVERLAY) {
		struct fb_gwinfo gwinfo;

		/* Disable graphic window */
		gwinfo.enabled = 0;
		mx2_gw_set(&gwinfo);

		prp_vf_mem_free(cam);
	}
	prp_rot_mem_free(cam);
	if (g_vaddr_fb) {
		iounmap(g_vaddr_fb);
		g_vaddr_fb = 0;
	}

	return 0;
}

/*!
 * @brief Setup overlay functions.
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
int prp_vf_select(void *private)
{
	int ret = 0;
	cam_data *cam = (cam_data *) private;

	if (cam) {
		cam->vf_start_sdc = prp_vf_start;
		cam->vf_stop_sdc = prp_vf_stop;
		cam->overlay_active = false;
	} else
		ret = -EIO;

	return ret;
}

/*!
 * @brief Uninstall overlay functions.
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
int prp_vf_deselect(void *private)
{
	int ret = 0;
	cam_data *cam = (cam_data *) private;

	ret = prp_vf_stop(private);

	if (cam) {
		cam->vf_start_sdc = NULL;
		cam->vf_stop_sdc = NULL;
	}

	return ret;
}

/*!
 * @brief Start still picture capture.
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
static int prp_still_start(void *private)
{
	cam_data *cam = (cam_data *) private;

	g_still_on = 1;
	g_prp_cfg.ch2_ptr = (unsigned int)cam->still_buf;
	g_prp_cfg.ch2_ptr2 = 0;

	if (prp_v4l2_cfg(&g_prp_cfg, cam))
		return -1;

	csi_enable_mclk(CSI_MCLK_RAW, true, true);
	prphw_reset();

	if (prphw_cfg(&g_prp_cfg)) {
		g_still_on = 0;
		return -1;
	}

	prphw_enable(cam->overlay_on ? (PRP_CHANNEL_1 | PRP_CHANNEL_2)
		     : PRP_CHANNEL_2);

	return 0;
}

/*!
 * @brief Stop still picture capture.
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
static int prp_still_stop(void *private)
{
	prphw_disable(PRP_CHANNEL_2);

	csi_enable_mclk(CSI_MCLK_RAW, false, false);

	g_still_on = 0;

	return 0;
}

/*!
 * @brief Setup functions for still picture capture.
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
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;
}

/*!
 * @brief Uninstall functions for still picture capture.
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
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;
}

/*!
 * @brief Perform software rotation or mirroring
 * @param private	Argument passed to the tasklet
 */
static void rotation(unsigned long private)
{
	char *src, *dst;
	int width, height, s_stride, d_stride;
	int size;
	cam_data *cam = (cam_data *) private;

	src = g_vaddr_rotbuf[g_rotbuf];
	size = cam->rot_vf_buf_size[g_rotbuf];

	if ((cam->rotation == V4L2_MXC_ROTATE_90_RIGHT)
	    || (cam->rotation == V4L2_MXC_ROTATE_90_RIGHT_VFLIP)
	    || (cam->rotation == V4L2_MXC_ROTATE_90_RIGHT_HFLIP)
	    || (cam->rotation == V4L2_MXC_ROTATE_90_LEFT)) {
		width = cam->win.w.height;
		height = cam->win.w.width;
		s_stride = cam->win.w.height << 1;
	} else {
		width = cam->win.w.width;
		height = cam->win.w.height;
		s_stride = cam->win.w.width << 1;
	}

	if (cam->v4l2_fb.flags == V4L2_FBUF_FLAG_OVERLAY) {
		dst = g_vaddr_vfbuf[g_vfbuf];
		d_stride = cam->win.w.width << 1;
	} else {		/* The destination is the framebuffer */
		struct fb_info *fb = cam->overlay_fb;
		if (!fb)
			return;
		dst = g_vaddr_fb;
		dst += cam->win.w.top * fb->var.xres_virtual
		    * (fb->var.bits_per_pixel >> 3)
		    + cam->win.w.left * (fb->var.bits_per_pixel >> 3);
		d_stride = fb->var.xres_virtual << 1;
	}

	/*
	 * Invalidate the data in cache before performing the SW rotaion
	 * or mirroring in case the image size is less than QVGA. For image
	 * larger than QVGA it is not invalidated becase the invalidation
	 * will consume much time while we don't see any artifacts on the
	 * output if we don't perform invalidation for them.
	 * Similarly we don't flush the data after SW rotation/mirroring.
	 */
	if (size < 320 * 240 * 2)
		consistent_sync(src, size, DMA_FROM_DEVICE);
	switch (cam->rotation) {
	case V4L2_MXC_ROTATE_VERT_FLIP:
		opl_vmirror_u16(src, s_stride, width, height, dst, d_stride);
		break;
	case V4L2_MXC_ROTATE_HORIZ_FLIP:
		opl_hmirror_u16(src, s_stride, width, height, dst, d_stride);
		break;
	case V4L2_MXC_ROTATE_180:
		opl_rotate180_u16(src, s_stride, width, height, dst, d_stride);
		break;
	case V4L2_MXC_ROTATE_90_RIGHT:
		opl_rotate90_u16(src, s_stride, width, height, dst, d_stride);
		break;
	case V4L2_MXC_ROTATE_90_RIGHT_VFLIP:
		opl_rotate90_vmirror_u16(src, s_stride, width, height, dst,
					 d_stride);
		break;
	case V4L2_MXC_ROTATE_90_RIGHT_HFLIP:
		/* ROTATE_90_RIGHT_HFLIP = ROTATE_270_RIGHT_VFLIP */
		opl_rotate270_vmirror_u16(src, s_stride, width, height, dst,
					  d_stride);
		break;
	case V4L2_MXC_ROTATE_90_LEFT:
		opl_rotate270_u16(src, s_stride, width, height, dst, d_stride);
		break;
	default:
		return;
	}

	/* Config and display the graphic window */
	if (cam->v4l2_fb.flags == V4L2_FBUF_FLAG_OVERLAY) {
		struct fb_gwinfo gwinfo;

		gwinfo.enabled = 1;
		gwinfo.alpha_value = 255;
		gwinfo.ck_enabled = 0;
		gwinfo.xpos = cam->win.w.left;
		gwinfo.ypos = cam->win.w.top;
		gwinfo.xres = cam->win.w.width;
		gwinfo.yres = cam->win.w.height;
		gwinfo.xres_virtual = cam->win.w.width;
		gwinfo.vs_reversed = 0;
		gwinfo.base = (unsigned long)cam->vf_bufs[g_vfbuf];
		mx2_gw_set(&gwinfo);

		g_vfbuf = g_vfbuf ? 0 : 1;
	}
}

/*
 * @brief Check if the resize ratio is supported based on the input and output
 *        dimension
 * @param	input	input dimension
 * @param	output	output dimension
 * @return	output dimension (should equal the parameter *output*)
 * 		-1 on failure
 */
static int check_simple(scale_t * scale, int input, int output, int ch)
{
	unsigned short int_out;	/* PrP internel width or height */
	unsigned short orig_out = output;

	if (prp_scale(scale, input, output, input, &orig_out, &int_out, ch))
		return -1;	/* resize failed */
	else
		return int_out;
}

/*!
 * @brief Check if the resize ratio is supported by PrP channel 1
 * @param cfg	Pointer to emma_prp_cfg structure
 * @return	Zero on success, others on failure
 */
static int prp_resize_check_ch1(emma_prp_cfg * cfg)
{
	int in_w, in_h, ch1_w, ch1_h, ch2_w, ch2_h, w, h;
	scale_t *pscale = &cfg->scale[0];	/* Ch1 width resize coeff */

	if (cfg->ch1_pix == PRP_PIX1_UNUSED)
		return 0;

	in_w = cfg->in_width;
	in_h = cfg->in_height;
	ch1_w = cfg->ch1_width;
	ch1_h = cfg->ch1_height;
	ch2_w = cfg->ch2_width;
	ch2_h = cfg->ch2_height;

	/*
	 * For channel 1, try parallel resize first. If the resize
	 * ratio is not exactly supported, try cascade resize. If it
	 * still fails, use parallel resize but with rounded value.
	 */
	w = check_simple(pscale, in_w, ch1_w, PRP_CHANNEL_1);
	h = check_simple(pscale + 1, in_h, ch1_h, PRP_CHANNEL_1);

	if ((in_w <= ch1_w * MAX_TBL) && (in_h <= MAX_TBL * ch1_h))
		goto exit_parallel;

	if (cfg->ch2_pix != PRP_PIX2_UNUSED) {
		/*
		 * Channel 2 is already used. The pscale is still pointing
		 * to ch1 resize coeff for temporary use.
		 */
		if ((ch2_w * MAX_TBL <= ch1_w) && (ch2_h * MAX_TBL <= ch1_h)) {
			w = check_simple(pscale, ch2_w, ch1_w, PRP_CHANNEL_1);
			h = check_simple(pscale + 1, ch2_h, ch1_h,
					 PRP_CHANNEL_1);
			goto exit_cascade;
		}
	} else {
		/*
		 * Try cascade resize for width, width is multiple of 2.
		 * Channel 2 is not used. So we have more values to pick
		 * for channel 2 resize.
		 */
		if (in_w * MAX_TBL > ch1_w) {
			for (w = in_w / 2; w > ch1_w; w /= 2) {
				/* Ch1 width resize */
				if (check_simple
				    (pscale, w, ch1_w, PRP_CHANNEL_1) < 0)
					continue;
				/* Ch2 width resize */
				ch2_w =
				    check_simple(pscale + 2, in_w, w,
						 PRP_CHANNEL_1);
				if (ch2_w < 0) {
					w = in_w / MAX_TBL;
					continue;
				}
				check_simple(pscale, ch2_w, ch1_w,
					     PRP_CHANNEL_1);
				break;
			}
		} else {
			w = check_simple(pscale, in_w, ch1_w, PRP_CHANNEL_1);
			ch2_w = check_simple(pscale + 2, w, w, PRP_CHANNEL_1);
		}
		if (ch2_w >= ch1_w) {
			if (in_h * MAX_TBL > ch1_h) {
				/* try cascade resize for height */
				for (h = in_h / 2; h > ch1_h; h /= 2) {
					/* Ch2 height resize */
					if (check_simple
					    (pscale + 1, h, ch1_h,
					     PRP_CHANNEL_1) < 0)
						continue;
					/* Ch1 height resize */
					ch2_h =
					    check_simple(pscale + 3, in_h, h,
							 PRP_CHANNEL_1);
					if (ch2_w < 0) {
						h = in_h / MAX_TBL;
						continue;
					}
					check_simple(pscale + 1, ch2_h, ch1_h,
						     PRP_CHANNEL_1);
					break;
				}
			} else {
				h = check_simple(pscale + 1, in_h, ch1_h,
						 PRP_CHANNEL_1);
				ch2_h =
				    check_simple(pscale + 3, h, h,
						 PRP_CHANNEL_1);
			}

			goto exit_cascade;
		}
	}


	pr_debug("Ch1 resize error.\n");
	return -1;

      exit_parallel:
	cfg->ch1_scale.algo |= PRP_ALGO_BYPASS;
	pr_debug("ch1 parallel resize.\n");
	pr_debug("original width = %d internel width = %d\n", ch1_w, w);
	pr_debug("original height = %d internel height = %d\n", ch1_h, h);
	return 0;

      exit_cascade:
	cfg->ch1_scale.algo &= ~PRP_ALGO_BYPASS;
	pr_debug("ch1 cascade resize.\n");
	pr_debug("[width] in : ch2 : ch1=%d : %d : %d\n", in_w, ch2_w, ch1_w);
	pr_debug("[height] in : ch2 : ch1=%d : %d : %d\n", in_h, ch2_h, ch1_h);
	return 0;
}

/*!
 * @brief Check if the resize ratio is supported by PrP channel 2
 * @param cfg	Pointer to emma_prp_cfg structure
 * @return	Zero on success, others on failure
 */
static int prp_resize_check_ch2(emma_prp_cfg * cfg)
{
	int w, h;
	scale_t *pscale = &cfg->scale[2];	/* Ch2 width resize coeff */

	if (cfg->ch2_pix == PRP_PIX2_UNUSED)
		return 0;

	w = check_simple(pscale, cfg->in_width, cfg->ch2_width, PRP_CHANNEL_2);
	h = check_simple(pscale + 1, cfg->in_height, cfg->ch2_height,
			 PRP_CHANNEL_2);
	if ((w != -1) && (h != -1)) {
		pr_debug("Ch2 resize.\n");
		pr_debug("Original width = %d internel width = %d\n",
			 cfg->ch2_width, w);
		pr_debug("Original height = %d internel height = %d\n",
			 cfg->ch2_height, h);
		return 0;
	} else {
		pr_debug("Ch2 resize error.\n");
		return -1;
	}
}