mx27_prpsw.c

freescale mx27 的TVP5150的源代码

/*
 * 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 mx27_prpsw.c
 *
 * @brief MX27 Video For Linux 2 capture driver
 *
 * @ingroup MXC_V4L2_CAPTURE
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <asm/irq.h>

#include "mxc_v4l2_capture.h"
#include "mx27_prp.h"
#include "mx27_csi.h"
#include "../drivers/video/mxc/mx2fb.h"
#include "../opl/opl.h"

#define MEAN_COEF	(SZ_COEF >> 1)

static char prp_dev[] = "emma_prp";
static int g_still_on = 0;
static emma_prp_cfg g_prp_cfg;
static int g_vfbuf, g_rotbuf;
static struct tasklet_struct prp_vf_tasklet;

/*
 * The following variables represents the virtual address for the cacheable
 * buffers accessed by SW rotation/mirroring. The rotation/mirroring in
 * cacheable buffers has significant performance improvement than it in
 * non-cacheable buffers.
 */
static char *g_vaddr_vfbuf[2] = { 0, 0 };
static char *g_vaddr_rotbuf[2] = { 0, 0 };
static char *g_vaddr_fb = 0;

static int set_ch1_addr(emma_prp_cfg * cfg, cam_data * cam);
static int prp_v4l2_cfg(emma_prp_cfg * cfg, cam_data * cam);
static int prp_vf_mem_alloc(cam_data * cam);
static void prp_vf_mem_free(cam_data * cam);
static int prp_rot_mem_alloc(cam_data * cam);
static void prp_rot_mem_free(cam_data * cam);
static int prp_enc_update_eba(u32 eba, int *buffer_num);
static int prp_enc_enable(void *private);
static int prp_enc_disable(void *private);
static int prp_vf_start(void *private);
static int prp_vf_stop(void *private);
static int prp_still_start(void *private);
static int prp_still_stop(void *private);
static irqreturn_t prp_isr(int irq, void *dev_id);
static void rotation(unsigned long private);
static int prp_resize_check_ch1(emma_prp_cfg * cfg);
static int prp_resize_check_ch2(emma_prp_cfg * cfg);

#define PRP_DUMP(val)	pr_debug("%s\t = 0x%08X\t%d\n", #val, val, val)

/*!
 * @brief Dump PrP configuration parameters.
 * @param cfg	The pointer to PrP configuration parameter
 */
static void prp_cfg_dump(emma_prp_cfg * cfg)
{
	PRP_DUMP(cfg->in_pix);
	PRP_DUMP(cfg->in_width);
	PRP_DUMP(cfg->in_height);
	PRP_DUMP(cfg->in_csi);
	PRP_DUMP(cfg->in_line_stride);
	PRP_DUMP(cfg->in_line_skip);
	PRP_DUMP(cfg->in_ptr);

	PRP_DUMP(cfg->ch1_pix);
	PRP_DUMP(cfg->ch1_width);
	PRP_DUMP(cfg->ch1_height);
	PRP_DUMP(cfg->ch1_scale.algo);
	PRP_DUMP(cfg->ch1_scale.width.num);
	PRP_DUMP(cfg->ch1_scale.width.den);
	PRP_DUMP(cfg->ch1_scale.height.num);
	PRP_DUMP(cfg->ch1_scale.height.den);
	PRP_DUMP(cfg->ch1_stride);
	PRP_DUMP(cfg->ch1_ptr);
	PRP_DUMP(cfg->ch1_ptr2);
	PRP_DUMP(cfg->ch1_csi);

	PRP_DUMP(cfg->ch2_pix);
	PRP_DUMP(cfg->ch2_width);
	PRP_DUMP(cfg->ch2_height);
	PRP_DUMP(cfg->ch2_scale.algo);
	PRP_DUMP(cfg->ch2_scale.width.num);
	PRP_DUMP(cfg->ch2_scale.width.den);
	PRP_DUMP(cfg->ch2_scale.height.num);
	PRP_DUMP(cfg->ch2_scale.height.den);
	PRP_DUMP(cfg->ch2_ptr);
	PRP_DUMP(cfg->ch2_ptr2);
	PRP_DUMP(cfg->ch2_csi);
}

/*!
 * @brief Set PrP channel 1 output address.
 * @param cfg	Pointer to emma_prp_cfg structure
 * @param cam	Pointer to cam_data structure
 * @return	Zero on success, others on failure
 */
static int set_ch1_addr(emma_prp_cfg * cfg, cam_data * cam)
{
	if (cam->rotation != V4L2_MXC_ROTATE_NONE) {
		cfg->ch1_ptr = (unsigned int)cam->rot_vf_bufs[0];
		cfg->ch1_ptr2 = (unsigned int)cam->rot_vf_bufs[1];
		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))
			cfg->ch1_stride = cam->win.w.height;
		else
			cfg->ch1_stride = cam->win.w.width;

		if (cam->v4l2_fb.flags != V4L2_FBUF_FLAG_OVERLAY) {
			struct fb_info *fb = cam->overlay_fb;
			if (!fb)
				return -1;
			if (g_vaddr_fb)
				iounmap(g_vaddr_fb);
			g_vaddr_fb = ioremap_cached(fb->fix.smem_start,
						    fb->fix.smem_len);
			if (!g_vaddr_fb)
				return -1;
		}
	} else if (cam->v4l2_fb.flags == V4L2_FBUF_FLAG_OVERLAY) {
		cfg->ch1_ptr = (unsigned int)cam->vf_bufs[0];
		cfg->ch1_ptr2 = (unsigned int)cam->vf_bufs[1];
		cfg->ch1_stride = cam->win.w.width;
	} else {
		struct fb_info *fb = cam->overlay_fb;

		if (!fb)
			return -1;

		cfg->ch1_ptr = fb->fix.smem_start;
		cfg->ch1_ptr += cam->win.w.top * fb->var.xres_virtual
		    * (fb->var.bits_per_pixel >> 3)
		    + cam->win.w.left * (fb->var.bits_per_pixel >> 3);
		cfg->ch1_ptr2 = cfg->ch1_ptr;
		cfg->ch1_stride = fb->var.xres_virtual;
	}

	return 0;
}

/*!
 * @brief Setup PrP configuration parameters.
 * @param cfg	Pointer to emma_prp_cfg structure
 * @param cam	Pointer to cam_data structure
 * @return	Zero on success, others on failure
 */
static int prp_v4l2_cfg(emma_prp_cfg * cfg, cam_data * cam)
{
	cfg->in_pix = PRP_PIXIN_YUYV;
	cfg->in_width = cam->crop_current.width;
	cfg->in_height = cam->crop_current.height;
	
//#ifdef CONFIG_MXC_TVIN_TVP5150 //gary modify			
#if defined(CONFIG_MXC_TVIN_TVP5150) || defined(CONFIG_MXC_TVIN_TVP5150_MODULE)
	cfg->in_line_stride = 16;
#else
	cfg->in_line_stride = cam->crop_current.left;
#endif
	cfg->in_line_skip = cam->crop_current.top;
	cfg->in_ptr = 0;
	cfg->in_csi = PRP_CSI_LOOP;
	memset(cfg->in_csc, 0, sizeof(cfg->in_csc));

	if (cam->overlay_on) {
		/* Convert V4L2 pixel format to PrP pixel format */
		switch (cam->v4l2_fb.fmt.pixelformat) {
		case V4L2_PIX_FMT_RGB332:
			cfg->ch1_pix = PRP_PIX1_RGB332;
			break;
		case V4L2_PIX_FMT_RGB32:
		case V4L2_PIX_FMT_BGR32:
			cfg->ch1_pix = PRP_PIX1_RGB888;
			break;
		case V4L2_PIX_FMT_YUYV:
			cfg->ch1_pix = PRP_PIX1_YUYV;
			break;
		case V4L2_PIX_FMT_UYVY:
			cfg->ch1_pix = PRP_PIX1_UYVY;
			break;
		case V4L2_PIX_FMT_RGB565:
		default:
			cfg->ch1_pix = PRP_PIX1_RGB565;
			break;
		}
		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)) {
			cfg->ch1_width = cam->win.w.height;
			cfg->ch1_height = cam->win.w.width;
		} else {
			cfg->ch1_width = cam->win.w.width;
			cfg->ch1_height = cam->win.w.height;
		}

		if (set_ch1_addr(cfg, cam))
			return -1;
	} else {
		cfg->ch1_pix = PRP_PIX1_UNUSED;
		cfg->ch1_width = cfg->in_width;
		cfg->ch1_height = cfg->in_height;
	}
	cfg->ch1_scale.algo = 0;
	cfg->ch1_scale.width.num = cfg->in_width;
	cfg->ch1_scale.width.den = cfg->ch1_width;
	cfg->ch1_scale.height.num = cfg->in_height;
	cfg->ch1_scale.height.den = cfg->ch1_height;
	cfg->ch1_csi = PRP_CSI_EN;

	if (cam->capture_on || g_still_on) {
		switch (cam->v2f.fmt.pix.pixelformat) {
		case V4L2_PIX_FMT_YUYV:
			cfg->ch2_pix = PRP_PIX2_YUV422;
			break;
		case V4L2_PIX_FMT_YUV420:
			cfg->ch2_pix = PRP_PIX2_YUV420;
			break;
			/*
			 * YUV444 is not defined by V4L2.
			 * We support it in default case.
			 */
		default:
			cfg->ch2_pix = PRP_PIX2_YUV444;
			break;
		}
		cfg->ch2_width = cam->v2f.fmt.pix.width;
		cfg->ch2_height = cam->v2f.fmt.pix.height;
	} else {
		cfg->ch2_pix = PRP_PIX2_UNUSED;
		cfg->ch2_width = cfg->in_width;
		cfg->ch2_height = cfg->in_height;
	}
	cfg->ch2_scale.algo = 0;
	cfg->ch2_scale.width.num = cfg->in_width;
	cfg->ch2_scale.width.den = cfg->ch2_width;
	cfg->ch2_scale.height.num = cfg->in_height;
	cfg->ch2_scale.height.den = cfg->ch2_height;
	cfg->ch2_csi = PRP_CSI_EN;

	memset(cfg->scale, 0, sizeof(cfg->scale));
	cfg->scale[0].algo = cfg->ch1_scale.algo & 3;
	cfg->scale[1].algo = (cfg->ch1_scale.algo >> 2) & 3;
	cfg->scale[2].algo = cfg->ch2_scale.algo & 3;
	cfg->scale[3].algo = (cfg->ch2_scale.algo >> 2) & 3;

	prp_cfg_dump(cfg);

	if (prp_resize_check_ch2(cfg))
		return -1;

	if (prp_resize_check_ch1(cfg))
		return -1;

	return 0;
}

/*!
 * @brief PrP interrupt handler
 */
static irqreturn_t prp_isr(int irq, void *dev_id)
{
	int status;
	cam_data *cam = (cam_data *) dev_id;

	status = prphw_isr();

	if (g_still_on && (status & PRP_INTRSTAT_CH2BUF1)) {
		prp_still_stop(cam);
		cam->still_counter++;
		wake_up_interruptible(&cam->still_queue);
		/*
		 * Still & video capture use the same PrP channel 2.
		 * They are execlusive.
		 */
	} else if (cam->capture_on) {
		if (status & PRP_INTRSTAT_CH2OVF) {
			prphw_disable(PRP_CHANNEL_2);
			prphw_enable(PRP_CHANNEL_2);
			cam->enc_callback(1, cam);
		}
		else if (status &
             (PRP_INTRSTAT_CH2BUF1 | PRP_INTRSTAT_CH2BUF2)) 		{
			cam->enc_callback(0, cam);
		}
	}
	if (cam->overlay_on
	    && (status & (PRP_INTRSTAT_CH1BUF1 | PRP_INTRSTAT_CH1BUF2))) {
		if (cam->rotation != V4L2_MXC_ROTATE_NONE) {
			g_rotbuf = (status & PRP_INTRSTAT_CH1BUF1) ? 0 : 1;
			tasklet_schedule(&prp_vf_tasklet);
		} else 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;

//#ifdef CONFIG_MXC_TVIN_TVP5150 //gary modify 2007-07-19			
//			gwinfo.base = (unsigned long)cam->vf_bufs[0];
//#else
			if (status & PRP_INTRSTAT_CH1BUF1)
				gwinfo.base = (unsigned long)cam->vf_bufs[0];
			else 
				gwinfo.base = (unsigned long)cam->vf_bufs[1];
//#endif

			mx2_gw_set(&gwinfo);
		}
	}

	return IRQ_HANDLED;
}

/*!
 * @brief PrP initialization.
 * @param dev_id	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
int prp_init(void *dev_id)
{
	enable_irq(INT_EMMAPRP);
	if (request_irq(INT_EMMAPRP, prp_isr, 0, prp_dev, dev_id))
		return -1;
	prphw_init();

	return 0;
}

/*!
 * @brief PrP initialization.
 * @param dev_id	Pointer to cam_data structure
 */
void prp_exit(void *dev_id)
{
	prphw_exit();
	disable_irq(INT_EMMAPRP);
	free_irq(INT_EMMAPRP, dev_id);
}

/*!
 * @brief Update PrP channel 2 output buffer address.
 * @param eba		Physical address for PrP output buffer
 * @param buffer_num	The PrP channel 2 buffer number to be updated
 * @return		Zero on success, others on failure
 */
static int prp_enc_update_eba(u32 eba, int *buffer_num)
{
	if (*buffer_num) {
		g_prp_cfg.ch2_ptr2 = eba;
		prphw_ch2ptr2(&g_prp_cfg);
		*buffer_num = 0;
	} else {
		g_prp_cfg.ch2_ptr = eba;
		prphw_ch2ptr(&g_prp_cfg);
		*buffer_num = 1;
	}

	return 0;
}

/*!
 * @brief Enable PrP for encoding.
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
static int prp_enc_enable(void *private)
{
	cam_data *cam = (cam_data *) private;

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

	csi_enable_mclk(CSI_MCLK_ENC, true, true);
	prphw_reset();

	if (prphw_cfg(&g_prp_cfg))
		return -1;

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

	return 0;
}

/*!
 * @brief Disable PrP for encoding.
 * @param private	Pointer to cam_data structure
 * @return		Zero on success, others on failure
 */
static int prp_enc_disable(void *private)
{
	prphw_disable(PRP_CHANNEL_2);
	csi_enable_mclk(CSI_MCLK_ENC, false, false);

	return 0;
}

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

	if (cam) {
		cam->enc_update_eba = prp_enc_update_eba;
		cam->enc_enable = prp_enc_enable;
		cam->enc_disable = prp_enc_disable;
	} else
		ret = -EIO;

	return ret;
}

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

	ret = prp_enc_disable(private);

	if (cam) {
		cam->enc_update_eba = NULL;
		cam->enc_enable = NULL;
		cam->enc_disable = NULL;
	}

	return ret;
}

/*!
 * @brief Allocate memory for overlay.
 * @param cam	Pointer to cam_data structure
 * @return	Zero on success, others on failure
 */
static int prp_vf_mem_alloc(cam_data * cam)
{
	int i;

	for (i = 0; i < 2; i++) {
		cam->vf_bufs_size[i] = cam->win.w.width * cam->win.w.height * 2;
		//cam->vf_bufs_size[i] = cam->win.w.width * cam->win.w.height * 4;//bsp
		
		cam->vf_bufs_vaddr[i] = dma_alloc_coherent(0,
							   cam->vf_bufs_size[i],
							   &cam->vf_bufs[i],
							   GFP_DMA |
							   GFP_KERNEL);
		if (!cam->vf_bufs_vaddr[i]) {
			pr_debug("Failed to alloc memory for vf.\n");
			prp_vf_mem_free(cam);
			return -1;
		}

		g_vaddr_vfbuf[i] =
		    ioremap_cached(cam->vf_bufs[i], cam->vf_bufs_size[i]);
		if (!g_vaddr_vfbuf[i]) {
			pr_debug("Failed to ioremap_cached() for vf.\n");
			prp_vf_mem_free(cam);
			return -1;
		}
	}

	return 0;
}

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

	for (i = 0; i < 2; i++) {
		if (cam->vf_bufs_vaddr[i]) {
			dma_free_coherent(0,
					  cam->vf_bufs_size[i],
					  cam->vf_bufs_vaddr[i],
					  cam->vf_bufs[i]);
		}
		cam->vf_bufs[i] = 0;
		cam->vf_bufs_vaddr[i] = 0;
		cam->vf_bufs_size[i] = 0;
		if (g_vaddr_vfbuf[i]) {
			iounmap(g_vaddr_vfbuf[i]);
			g_vaddr_vfbuf[i] = 0;
		}
	}
}

/*!
 * @brief Allocate intermediate memory for overlay rotation/mirroring.
 * @param cam	Pointer to cam_data structure
 * @return	Zero on success, others on failure