drivers/media/video/davinci/vpbe_venc.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (C) 2010 Texas Instruments Inc
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation version 2.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/ctype.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/videodev2.h>
 #include <linux/slab.h>

 #include <mach/hardware.h>
 #include <mach/mux.h>
 #include <mach/io.h>
 #include <mach/i2c.h>

 #include <linux/io.h>

 #include <media/davinci/vpbe_types.h>
 #include <media/davinci/vpbe_venc.h>
 #include <media/davinci/vpss.h>
 #include <media/v4l2-device.h>

 #include "vpbe_venc_regs.h"

 #define MODULE_NAME	VPBE_VENC_SUBDEV_NAME

 static int debug = 2;
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Debug level 0-2");

 struct venc_state {
 	struct v4l2_subdev sd;
 	struct venc_callback *callback;
 	struct venc_platform_data *pdata;
 	struct device *pdev;
 	u32 output;
 	v4l2_std_id std;
 	spinlock_t lock;
 	void __iomem *venc_base;
 	void __iomem *vdaccfg_reg;
 };

 static inline struct venc_state *to_state(struct v4l2_subdev *sd)
 {
 	return container_of(sd, struct venc_state, sd);
 }

 static inline u32 venc_read(struct v4l2_subdev *sd, u32 offset)
 {
 	struct venc_state *venc = to_state(sd);

 	return readl(venc->venc_base + offset);
 }

 static inline u32 venc_write(struct v4l2_subdev *sd, u32 offset, u32 val)
 {
 	struct venc_state *venc = to_state(sd);

 	writel(val, (venc->venc_base + offset));

 	return val;
 }

 static inline u32 venc_modify(struct v4l2_subdev *sd, u32 offset,
 				 u32 val, u32 mask)
 {
 	u32 new_val = (venc_read(sd, offset) & ~mask) | (val & mask);

 	venc_write(sd, offset, new_val);

 	return new_val;
 }

 static inline u32 vdaccfg_write(struct v4l2_subdev *sd, u32 val)
 {
 	struct venc_state *venc = to_state(sd);

 	writel(val, venc->vdaccfg_reg);

 	val = readl(venc->vdaccfg_reg);

 	return val;
 }

 #define VDAC_COMPONENT	0x543
 #define VDAC_S_VIDEO	0x210
 /* This function sets the dac of the VPBE for various outputs
  */
 static int venc_set_dac(struct v4l2_subdev *sd, u32 out_index)
 {
 	switch (out_index) {
 	case 0:
 		v4l2_dbg(debug, 1, sd, "Setting output to Composite\n");
 		venc_write(sd, VENC_DACSEL, 0);
 		break;
 	case 1:
 		v4l2_dbg(debug, 1, sd, "Setting output to Component\n");
 		venc_write(sd, VENC_DACSEL, VDAC_COMPONENT);
 		break;
 	case 2:
 		v4l2_dbg(debug, 1, sd, "Setting output to S-video\n");
 		venc_write(sd, VENC_DACSEL, VDAC_S_VIDEO);
 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static void venc_enabledigitaloutput(struct v4l2_subdev *sd, int benable)
 {
 	struct venc_state *venc = to_state(sd);
 	struct venc_platform_data *pdata = venc->pdata;
 	v4l2_dbg(debug, 2, sd, "venc_enabledigitaloutput\n");

 	if (benable) {
 		venc_write(sd, VENC_VMOD, 0);
 		venc_write(sd, VENC_CVBS, 0);
 		venc_write(sd, VENC_LCDOUT, 0);
 		venc_write(sd, VENC_HSPLS, 0);
 		venc_write(sd, VENC_HSTART, 0);
 		venc_write(sd, VENC_HVALID, 0);
 		venc_write(sd, VENC_HINT, 0);
 		venc_write(sd, VENC_VSPLS, 0);
 		venc_write(sd, VENC_VSTART, 0);
 		venc_write(sd, VENC_VVALID, 0);
 		venc_write(sd, VENC_VINT, 0);
 		venc_write(sd, VENC_YCCCTL, 0);
 		venc_write(sd, VENC_DACSEL, 0);

 	} else {
 		venc_write(sd, VENC_VMOD, 0);
 		/* disable VCLK output pin enable */
 		venc_write(sd, VENC_VIDCTL, 0x141);

 		/* Disable output sync pins */
 		venc_write(sd, VENC_SYNCCTL, 0);

 		/* Disable DCLOCK */
 		venc_write(sd, VENC_DCLKCTL, 0);
 		venc_write(sd, VENC_DRGBX1, 0x0000057C);

 		/* Disable LCD output control (accepting default polarity) */
 		venc_write(sd, VENC_LCDOUT, 0);
 		if (pdata->venc_type != VPBE_VERSION_3)
 			venc_write(sd, VENC_CMPNT, 0x100);
 		venc_write(sd, VENC_HSPLS, 0);
 		venc_write(sd, VENC_HINT, 0);
 		venc_write(sd, VENC_HSTART, 0);
 		venc_write(sd, VENC_HVALID, 0);

 		venc_write(sd, VENC_VSPLS, 0);
 		venc_write(sd, VENC_VINT, 0);
 		venc_write(sd, VENC_VSTART, 0);
 		venc_write(sd, VENC_VVALID, 0);

 		venc_write(sd, VENC_HSDLY, 0);
 		venc_write(sd, VENC_VSDLY, 0);

 		venc_write(sd, VENC_YCCCTL, 0);
 		venc_write(sd, VENC_VSTARTA, 0);

 		/* Set OSD clock and OSD Sync Adavance registers */
 		venc_write(sd, VENC_OSDCLK0, 1);
 		venc_write(sd, VENC_OSDCLK1, 2);
 	}
 }

 #define VDAC_CONFIG_SD_V3	0x0E21A6B6
 #define VDAC_CONFIG_SD_V2	0x081141CF
 /*
  * setting NTSC mode
  */
 static int venc_set_ntsc(struct v4l2_subdev *sd)
 {
 	u32 val;
 	struct venc_state *venc = to_state(sd);
 	struct venc_platform_data *pdata = venc->pdata;

 	v4l2_dbg(debug, 2, sd, "venc_set_ntsc\n");

 	/* Setup clock at VPSS & VENC for SD */
 	vpss_enable_clock(VPSS_VENC_CLOCK_SEL, 1);
 	if (pdata->setup_clock(VPBE_ENC_STD, V4L2_STD_525_60) < 0)
 		return -EINVAL;

 	venc_enabledigitaloutput(sd, 0);

 	if (pdata->venc_type == VPBE_VERSION_3) {
 		venc_write(sd, VENC_CLKCTL, 0x01);
 		venc_write(sd, VENC_VIDCTL, 0);
 		val = vdaccfg_write(sd, VDAC_CONFIG_SD_V3);
 	} else if (pdata->venc_type == VPBE_VERSION_2) {
 		venc_write(sd, VENC_CLKCTL, 0x01);
 		venc_write(sd, VENC_VIDCTL, 0);
 		vdaccfg_write(sd, VDAC_CONFIG_SD_V2);
 	} else {
 		/* to set VENC CLK DIV to 1 - final clock is 54 MHz */
 		venc_modify(sd, VENC_VIDCTL, 0, 1 << 1);
 		/* Set REC656 Mode */
 		venc_write(sd, VENC_YCCCTL, 0x1);
 		venc_modify(sd, VENC_VDPRO, 0, VENC_VDPRO_DAFRQ);
 		venc_modify(sd, VENC_VDPRO, 0, VENC_VDPRO_DAUPS);
 	}

 	venc_write(sd, VENC_VMOD, 0);
 	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
 			VENC_VMOD_VIE);
 	venc_modify(sd, VENC_VMOD, (0 << VENC_VMOD_VMD), VENC_VMOD_VMD);
 	venc_modify(sd, VENC_VMOD, (0 << VENC_VMOD_TVTYP_SHIFT),
 			VENC_VMOD_TVTYP);
 	venc_write(sd, VENC_DACTST, 0x0);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

 	return 0;
 }

 /*
  * setting PAL mode
  */
 static int venc_set_pal(struct v4l2_subdev *sd)
 {
 	struct venc_state *venc = to_state(sd);
 	struct venc_platform_data *pdata = venc->pdata;

 	v4l2_dbg(debug, 2, sd, "venc_set_pal\n");

 	/* Setup clock at VPSS & VENC for SD */
 	vpss_enable_clock(VPSS_VENC_CLOCK_SEL, 1);
 	if (venc->pdata->setup_clock(VPBE_ENC_STD, V4L2_STD_625_50) < 0)
 		return -EINVAL;

 	venc_enabledigitaloutput(sd, 0);

 	if (pdata->venc_type == VPBE_VERSION_3) {
 		venc_write(sd, VENC_CLKCTL, 0x1);
 		venc_write(sd, VENC_VIDCTL, 0);
 		vdaccfg_write(sd, VDAC_CONFIG_SD_V3);
 	} else if (pdata->venc_type == VPBE_VERSION_2) {
 		venc_write(sd, VENC_CLKCTL, 0x1);
 		venc_write(sd, VENC_VIDCTL, 0);
 		vdaccfg_write(sd, VDAC_CONFIG_SD_V2);
 	} else {
 		/* to set VENC CLK DIV to 1 - final clock is 54 MHz */
 		venc_modify(sd, VENC_VIDCTL, 0, 1 << 1);
 		/* Set REC656 Mode */
 		venc_write(sd, VENC_YCCCTL, 0x1);
 	}

 	venc_modify(sd, VENC_SYNCCTL, 1 << VENC_SYNCCTL_OVD_SHIFT,
 			VENC_SYNCCTL_OVD);
 	venc_write(sd, VENC_VMOD, 0);
 	venc_modify(sd, VENC_VMOD,
 			(1 << VENC_VMOD_VIE_SHIFT),
 			VENC_VMOD_VIE);
 	venc_modify(sd, VENC_VMOD,
 			(0 << VENC_VMOD_VMD), VENC_VMOD_VMD);
 	venc_modify(sd, VENC_VMOD,
 			(1 << VENC_VMOD_TVTYP_SHIFT),
 			VENC_VMOD_TVTYP);
 	venc_write(sd, VENC_DACTST, 0x0);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

 	return 0;
 }

 #define VDAC_CONFIG_HD_V2	0x081141EF
 /*
  * venc_set_480p59_94
  *
  * This function configures the video encoder to EDTV(525p) component setting.
  */
 static int venc_set_480p59_94(struct v4l2_subdev *sd)
 {
 	struct venc_state *venc = to_state(sd);
 	struct venc_platform_data *pdata = venc->pdata;

 	v4l2_dbg(debug, 2, sd, "venc_set_480p59_94\n");
 	if ((pdata->venc_type != VPBE_VERSION_1) &&
 	    (pdata->venc_type != VPBE_VERSION_2))
 		return -EINVAL;

 	/* Setup clock at VPSS & VENC for SD */
 	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_480P59_94) < 0)
 		return -EINVAL;

 	venc_enabledigitaloutput(sd, 0);

 	if (pdata->venc_type == VPBE_VERSION_2)
 		vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
 	venc_write(sd, VENC_OSDCLK0, 0);
 	venc_write(sd, VENC_OSDCLK1, 1);

 	if (pdata->venc_type == VPBE_VERSION_1) {
 		venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAFRQ,
 			    VENC_VDPRO_DAFRQ);
 		venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAUPS,
 			    VENC_VDPRO_DAUPS);
 	}

 	venc_write(sd, VENC_VMOD, 0);
 	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
 		    VENC_VMOD_VIE);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
 	venc_modify(sd, VENC_VMOD, (HDTV_525P << VENC_VMOD_TVTYP_SHIFT),
 		    VENC_VMOD_TVTYP);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_VDMD_YCBCR8 <<
 		    VENC_VMOD_VDMD_SHIFT, VENC_VMOD_VDMD);

 	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

 	return 0;
 }

 /*
  * venc_set_625p
  *
  * This function configures the video encoder to HDTV(625p) component setting
  */
 static int venc_set_576p50(struct v4l2_subdev *sd)
 {
 	struct venc_state *venc = to_state(sd);
 	struct venc_platform_data *pdata = venc->pdata;

 	v4l2_dbg(debug, 2, sd, "venc_set_576p50\n");

 	if ((pdata->venc_type != VPBE_VERSION_1) &&
 	  (pdata->venc_type != VPBE_VERSION_2))
 		return -EINVAL;
 	/* Setup clock at VPSS & VENC for SD */
 	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_576P50) < 0)
 		return -EINVAL;

 	venc_enabledigitaloutput(sd, 0);

 	if (pdata->venc_type == VPBE_VERSION_2)
 		vdaccfg_write(sd, VDAC_CONFIG_HD_V2);

 	venc_write(sd, VENC_OSDCLK0, 0);
 	venc_write(sd, VENC_OSDCLK1, 1);

 	if (pdata->venc_type == VPBE_VERSION_1) {
 		venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAFRQ,
 			    VENC_VDPRO_DAFRQ);
 		venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAUPS,
 			    VENC_VDPRO_DAUPS);
 	}

 	venc_write(sd, VENC_VMOD, 0);
 	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
 		    VENC_VMOD_VIE);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
 	venc_modify(sd, VENC_VMOD, (HDTV_625P << VENC_VMOD_TVTYP_SHIFT),
 		    VENC_VMOD_TVTYP);

 	venc_modify(sd, VENC_VMOD, VENC_VMOD_VDMD_YCBCR8 <<
 		    VENC_VMOD_VDMD_SHIFT, VENC_VMOD_VDMD);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

 	return 0;
 }

 /*
  * venc_set_720p60_internal - Setup 720p60 in venc for dm365 only
  */
 static int venc_set_720p60_internal(struct v4l2_subdev *sd)
 {
 	struct venc_state *venc = to_state(sd);
 	struct venc_platform_data *pdata = venc->pdata;

 	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_720P60) < 0)
 		return -EINVAL;

 	venc_enabledigitaloutput(sd, 0);

 	venc_write(sd, VENC_OSDCLK0, 0);
 	venc_write(sd, VENC_OSDCLK1, 1);

 	venc_write(sd, VENC_VMOD, 0);
 	/* DM365 component HD mode */
 	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
 	    VENC_VMOD_VIE);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
 	venc_modify(sd, VENC_VMOD, (HDTV_720P << VENC_VMOD_TVTYP_SHIFT),
 		    VENC_VMOD_TVTYP);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
 	venc_write(sd, VENC_XHINTVL, 0);
 	return 0;
 }

 /*
  * venc_set_1080i30_internal - Setup 1080i30 in venc for dm365 only
  */
 static int venc_set_1080i30_internal(struct v4l2_subdev *sd)
 {
 	struct venc_state *venc = to_state(sd);
 	struct venc_platform_data *pdata = venc->pdata;

 	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_1080P30) < 0)
 		return -EINVAL;

 	venc_enabledigitaloutput(sd, 0);

 	venc_write(sd, VENC_OSDCLK0, 0);
 	venc_write(sd, VENC_OSDCLK1, 1);


 	venc_write(sd, VENC_VMOD, 0);
 	/* DM365 component HD mode */
 	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
 		    VENC_VMOD_VIE);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
 	venc_modify(sd, VENC_VMOD, (HDTV_1080I << VENC_VMOD_TVTYP_SHIFT),
 		    VENC_VMOD_TVTYP);
 	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
 	venc_write(sd, VENC_XHINTVL, 0);
 	return 0;
 }

 static int venc_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm)
 {
 	v4l2_dbg(debug, 1, sd, "venc_s_std_output\n");

 	if (norm & V4L2_STD_525_60)
 		return venc_set_ntsc(sd);
 	else if (norm & V4L2_STD_625_50)
 		return venc_set_pal(sd);

 	return -EINVAL;
 }

 static int venc_s_dv_preset(struct v4l2_subdev *sd,
 			    struct v4l2_dv_preset *dv_preset)
 {
 	struct venc_state *venc = to_state(sd);
 	int ret;

 	v4l2_dbg(debug, 1, sd, "venc_s_dv_preset\n");

 	if (dv_preset->preset == V4L2_DV_576P50)
 		return venc_set_576p50(sd);
 	else if (dv_preset->preset == V4L2_DV_480P59_94)
 		return venc_set_480p59_94(sd);
 	else if ((dv_preset->preset == V4L2_DV_720P60) &&
 			(venc->pdata->venc_type == VPBE_VERSION_2)) {
 		/* TBD setup internal 720p mode here */
 		ret = venc_set_720p60_internal(sd);
 		/* for DM365 VPBE, there is DAC inside */
 		vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
 		return ret;
 	} else if ((dv_preset->preset == V4L2_DV_1080I30) &&
 		(venc->pdata->venc_type == VPBE_VERSION_2)) {
 		/* TBD setup internal 1080i mode here */
 		ret = venc_set_1080i30_internal(sd);
 		/* for DM365 VPBE, there is DAC inside */
 		vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
 		return ret;
 	}
 	return -EINVAL;
 }

 static int venc_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
 			  u32 config)
 {
 	struct venc_state *venc = to_state(sd);
 	int ret;

 	v4l2_dbg(debug, 1, sd, "venc_s_routing\n");

 	ret = venc_set_dac(sd, output);
 	if (!ret)
 		venc->output = output;

 	return ret;
 }

 static long venc_ioctl(struct v4l2_subdev *sd,
 			unsigned int cmd,
 			void *arg)
 {
 	u32 val;

 	switch (cmd) {
 	case VENC_GET_FLD:
 		val = venc_read(sd, VENC_VSTAT);
 		*((int *)arg) = ((val & VENC_VSTAT_FIDST) ==
 		VENC_VSTAT_FIDST);
 		break;
 	default:
 		v4l2_err(sd, "Wrong IOCTL cmd\n");
 		break;
 	}

 	return 0;
 }

 static const struct v4l2_subdev_core_ops venc_core_ops = {
 	.ioctl      = venc_ioctl,
 };

 static const struct v4l2_subdev_video_ops venc_video_ops = {
 	.s_routing = venc_s_routing,
 	.s_std_output = venc_s_std_output,
 	.s_dv_preset = venc_s_dv_preset,
 };

 static const struct v4l2_subdev_ops venc_ops = {
 	.core = &venc_core_ops,
 	.video = &venc_video_ops,
 };

 static int venc_initialize(struct v4l2_subdev *sd)
 {
 	struct venc_state *venc = to_state(sd);
 	int ret;

 	/* Set default to output to composite and std to NTSC */
 	venc->output = 0;
 	venc->std = V4L2_STD_525_60;

 	ret = venc_s_routing(sd, 0, venc->output, 0);
 	if (ret < 0) {
 		v4l2_err(sd, "Error setting output during init\n");
 		return -EINVAL;
 	}

 	ret = venc_s_std_output(sd, venc->std);
 	if (ret < 0) {
 		v4l2_err(sd, "Error setting std during init\n");
 		return -EINVAL;
 	}

 	return ret;
 }

 static int venc_device_get(struct device *dev, void *data)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct venc_state **venc = data;

 	if (strcmp(MODULE_NAME, pdev->name) == 0)
 		*venc = platform_get_drvdata(pdev);

 	return 0;
 }

 struct v4l2_subdev *venc_sub_dev_init(struct v4l2_device *v4l2_dev,
 		const char *venc_name)
 {
 	struct venc_state *venc;
 	int err;

 	err = bus_for_each_dev(&platform_bus_type, NULL, &venc,
 			venc_device_get);
 	if (venc == NULL)
 		return NULL;

 	v4l2_subdev_init(&venc->sd, &venc_ops);

 	strcpy(venc->sd.name, venc_name);
 	if (v4l2_device_register_subdev(v4l2_dev, &venc->sd) < 0) {
 		v4l2_err(v4l2_dev,
 			"vpbe unable to register venc sub device\n");
 		return NULL;
 	}
 	if (venc_initialize(&venc->sd)) {
 		v4l2_err(v4l2_dev,
 			"vpbe venc initialization failed\n");
 		return NULL;
 	}

 	return &venc->sd;
 }
 EXPORT_SYMBOL(venc_sub_dev_init);

 static int venc_probe(struct platform_device *pdev)
 {
 	struct venc_state *venc;
 	struct resource *res;
 	int ret;

 	venc = kzalloc(sizeof(struct venc_state), GFP_KERNEL);
 	if (venc == NULL)
 		return -ENOMEM;

 	venc->pdev = &pdev->dev;
 	venc->pdata = pdev->dev.platform_data;
 	if (NULL == venc->pdata) {
 		dev_err(venc->pdev, "Unable to get platform data for"
 			" VENC sub device");
 		ret = -ENOENT;
 		goto free_mem;
 	}
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(venc->pdev,
 			"Unable to get VENC register address map\n");
 		ret = -ENODEV;
 		goto free_mem;
 	}

 	if (!request_mem_region(res->start, resource_size(res), "venc")) {
 		dev_err(venc->pdev, "Unable to reserve VENC MMIO region\n");
 		ret = -ENODEV;
 		goto free_mem;
 	}

 	venc->venc_base = ioremap_nocache(res->start, resource_size(res));
 	if (!venc->venc_base) {
 		dev_err(venc->pdev, "Unable to map VENC IO space\n");
 		ret = -ENODEV;
 		goto release_venc_mem_region;
 	}

 	if (venc->pdata->venc_type != VPBE_VERSION_1) {
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 		if (!res) {
 			dev_err(venc->pdev,
 				"Unable to get VDAC_CONFIG address map\n");
 			ret = -ENODEV;
 			goto unmap_venc_io;
 		}

 		if (!request_mem_region(res->start,
 					resource_size(res), "venc")) {
 			dev_err(venc->pdev,
 				"Unable to reserve VDAC_CONFIG  MMIO region\n");
 			ret = -ENODEV;
 			goto unmap_venc_io;
 		}

 		venc->vdaccfg_reg = ioremap_nocache(res->start,
 						    resource_size(res));
 		if (!venc->vdaccfg_reg) {
 			dev_err(venc->pdev,
 				"Unable to map VDAC_CONFIG IO space\n");
 			ret = -ENODEV;
 			goto release_vdaccfg_mem_region;
 		}
 	}
 	spin_lock_init(&venc->lock);
 	platform_set_drvdata(pdev, venc);
 	dev_notice(venc->pdev, "VENC sub device probe success\n");
 	return 0;

 release_vdaccfg_mem_region:
 	release_mem_region(res->start, resource_size(res));
 unmap_venc_io:
 	iounmap(venc->venc_base);
 release_venc_mem_region:
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	release_mem_region(res->start, resource_size(res));
 free_mem:
 	kfree(venc);
 	return ret;
 }

 static int venc_remove(struct platform_device *pdev)
 {
 	struct venc_state *venc = platform_get_drvdata(pdev);
 	struct resource *res;

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	iounmap((void *)venc->venc_base);
 	release_mem_region(res->start, resource_size(res));
 	if (venc->pdata->venc_type != VPBE_VERSION_1) {
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 		iounmap((void *)venc->vdaccfg_reg);
 		release_mem_region(res->start, resource_size(res));
 	}
 	kfree(venc);

 	return 0;
 }

 static struct platform_driver venc_driver = {
 	.probe		= venc_probe,
 	.remove		= venc_remove,
 	.driver		= {
 		.name	= MODULE_NAME,
 		.owner	= THIS_MODULE,
 	},
 };

 module_platform_driver(venc_driver);

 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("VPBE VENC Driver");
 MODULE_AUTHOR("Texas Instruments");
	/*
	* Copyright (C) 2010 Texas Instruments Inc
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation version 2.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/ctype.h>
	#include <linux/delay.h>
	#include <linux/device.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/videodev2.h>
	#include <linux/slab.h>

	#include <mach/hardware.h>
	#include <mach/mux.h>
	#include <mach/io.h>
	#include <mach/i2c.h>

	#include <linux/io.h>

	#include <media/davinci/vpbe_types.h>
	#include <media/davinci/vpbe_venc.h>
	#include <media/davinci/vpss.h>
	#include <media/v4l2-device.h>

	#include "vpbe_venc_regs.h"

	#define MODULE_NAME VPBE_VENC_SUBDEV_NAME

	static int debug = 2;
	module_param(debug, int, 0644);
	MODULE_PARM_DESC(debug, "Debug level 0-2");

	struct venc_state {
	struct v4l2_subdev sd;
	struct venc_callback *callback;
	struct venc_platform_data *pdata;
	struct device *pdev;
	u32 output;
	v4l2_std_id std;
	spinlock_t lock;
	void __iomem *venc_base;
	void __iomem *vdaccfg_reg;
	};

	static inline struct venc_state to_state(struct v4l2_subdev sd)
	{
	return container_of(sd, struct venc_state, sd);
	}

	static inline u32 venc_read(struct v4l2_subdev *sd, u32 offset)
	{
	struct venc_state *venc = to_state(sd);

	return readl(venc->venc_base + offset);
	}

	static inline u32 venc_write(struct v4l2_subdev *sd, u32 offset, u32 val)
	{
	struct venc_state *venc = to_state(sd);

	writel(val, (venc->venc_base + offset));

	return val;
	}

	static inline u32 venc_modify(struct v4l2_subdev *sd, u32 offset,
	u32 val, u32 mask)
	{
	u32 new_val = (venc_read(sd, offset) & ~mask) \| (val & mask);

	venc_write(sd, offset, new_val);

	return new_val;
	}

	static inline u32 vdaccfg_write(struct v4l2_subdev *sd, u32 val)
	{
	struct venc_state *venc = to_state(sd);

	writel(val, venc->vdaccfg_reg);

	val = readl(venc->vdaccfg_reg);

	return val;
	}

	#define VDAC_COMPONENT 0x543
	#define VDAC_S_VIDEO 0x210
	/* This function sets the dac of the VPBE for various outputs
	*/
	static int venc_set_dac(struct v4l2_subdev *sd, u32 out_index)
	{
	switch (out_index) {
	case 0:
	v4l2_dbg(debug, 1, sd, "Setting output to Composite\n");
	venc_write(sd, VENC_DACSEL, 0);
	break;
	case 1:
	v4l2_dbg(debug, 1, sd, "Setting output to Component\n");
	venc_write(sd, VENC_DACSEL, VDAC_COMPONENT);
	break;
	case 2:
	v4l2_dbg(debug, 1, sd, "Setting output to S-video\n");
	venc_write(sd, VENC_DACSEL, VDAC_S_VIDEO);
	break;
	default:
	return -EINVAL;
	}

	return 0;
	}

	static void venc_enabledigitaloutput(struct v4l2_subdev *sd, int benable)
	{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;
	v4l2_dbg(debug, 2, sd, "venc_enabledigitaloutput\n");

	if (benable) {
	venc_write(sd, VENC_VMOD, 0);
	venc_write(sd, VENC_CVBS, 0);
	venc_write(sd, VENC_LCDOUT, 0);
	venc_write(sd, VENC_HSPLS, 0);
	venc_write(sd, VENC_HSTART, 0);
	venc_write(sd, VENC_HVALID, 0);
	venc_write(sd, VENC_HINT, 0);
	venc_write(sd, VENC_VSPLS, 0);
	venc_write(sd, VENC_VSTART, 0);
	venc_write(sd, VENC_VVALID, 0);
	venc_write(sd, VENC_VINT, 0);
	venc_write(sd, VENC_YCCCTL, 0);
	venc_write(sd, VENC_DACSEL, 0);

	} else {
	venc_write(sd, VENC_VMOD, 0);
	/* disable VCLK output pin enable */
	venc_write(sd, VENC_VIDCTL, 0x141);

	/* Disable output sync pins */
	venc_write(sd, VENC_SYNCCTL, 0);

	/* Disable DCLOCK */
	venc_write(sd, VENC_DCLKCTL, 0);
	venc_write(sd, VENC_DRGBX1, 0x0000057C);

	/* Disable LCD output control (accepting default polarity) */
	venc_write(sd, VENC_LCDOUT, 0);
	if (pdata->venc_type != VPBE_VERSION_3)
	venc_write(sd, VENC_CMPNT, 0x100);
	venc_write(sd, VENC_HSPLS, 0);
	venc_write(sd, VENC_HINT, 0);
	venc_write(sd, VENC_HSTART, 0);
	venc_write(sd, VENC_HVALID, 0);

	venc_write(sd, VENC_VSPLS, 0);
	venc_write(sd, VENC_VINT, 0);
	venc_write(sd, VENC_VSTART, 0);
	venc_write(sd, VENC_VVALID, 0);

	venc_write(sd, VENC_HSDLY, 0);
	venc_write(sd, VENC_VSDLY, 0);

	venc_write(sd, VENC_YCCCTL, 0);
	venc_write(sd, VENC_VSTARTA, 0);

	/* Set OSD clock and OSD Sync Adavance registers */
	venc_write(sd, VENC_OSDCLK0, 1);
	venc_write(sd, VENC_OSDCLK1, 2);
	}
	}

	#define VDAC_CONFIG_SD_V3 0x0E21A6B6
	#define VDAC_CONFIG_SD_V2 0x081141CF
	/*
	* setting NTSC mode
	*/
	static int venc_set_ntsc(struct v4l2_subdev *sd)
	{
	u32 val;
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	v4l2_dbg(debug, 2, sd, "venc_set_ntsc\n");

	/* Setup clock at VPSS & VENC for SD */
	vpss_enable_clock(VPSS_VENC_CLOCK_SEL, 1);
	if (pdata->setup_clock(VPBE_ENC_STD, V4L2_STD_525_60) < 0)
	return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	if (pdata->venc_type == VPBE_VERSION_3) {
	venc_write(sd, VENC_CLKCTL, 0x01);
	venc_write(sd, VENC_VIDCTL, 0);
	val = vdaccfg_write(sd, VDAC_CONFIG_SD_V3);
	} else if (pdata->venc_type == VPBE_VERSION_2) {
	venc_write(sd, VENC_CLKCTL, 0x01);
	venc_write(sd, VENC_VIDCTL, 0);
	vdaccfg_write(sd, VDAC_CONFIG_SD_V2);
	} else {
	/* to set VENC CLK DIV to 1 - final clock is 54 MHz */
	venc_modify(sd, VENC_VIDCTL, 0, 1 << 1);
	/* Set REC656 Mode */
	venc_write(sd, VENC_YCCCTL, 0x1);
	venc_modify(sd, VENC_VDPRO, 0, VENC_VDPRO_DAFRQ);
	venc_modify(sd, VENC_VDPRO, 0, VENC_VDPRO_DAUPS);
	}

	venc_write(sd, VENC_VMOD, 0);
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
	VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, (0 << VENC_VMOD_VMD), VENC_VMOD_VMD);
	venc_modify(sd, VENC_VMOD, (0 << VENC_VMOD_TVTYP_SHIFT),
	VENC_VMOD_TVTYP);
	venc_write(sd, VENC_DACTST, 0x0);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

	return 0;
	}

	/*
	* setting PAL mode
	*/
	static int venc_set_pal(struct v4l2_subdev *sd)
	{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	v4l2_dbg(debug, 2, sd, "venc_set_pal\n");

	/* Setup clock at VPSS & VENC for SD */
	vpss_enable_clock(VPSS_VENC_CLOCK_SEL, 1);
	if (venc->pdata->setup_clock(VPBE_ENC_STD, V4L2_STD_625_50) < 0)
	return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	if (pdata->venc_type == VPBE_VERSION_3) {
	venc_write(sd, VENC_CLKCTL, 0x1);
	venc_write(sd, VENC_VIDCTL, 0);
	vdaccfg_write(sd, VDAC_CONFIG_SD_V3);
	} else if (pdata->venc_type == VPBE_VERSION_2) {
	venc_write(sd, VENC_CLKCTL, 0x1);
	venc_write(sd, VENC_VIDCTL, 0);
	vdaccfg_write(sd, VDAC_CONFIG_SD_V2);
	} else {
	/* to set VENC CLK DIV to 1 - final clock is 54 MHz */
	venc_modify(sd, VENC_VIDCTL, 0, 1 << 1);
	/* Set REC656 Mode */
	venc_write(sd, VENC_YCCCTL, 0x1);
	}

	venc_modify(sd, VENC_SYNCCTL, 1 << VENC_SYNCCTL_OVD_SHIFT,
	VENC_SYNCCTL_OVD);
	venc_write(sd, VENC_VMOD, 0);
	venc_modify(sd, VENC_VMOD,
	(1 << VENC_VMOD_VIE_SHIFT),
	VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD,
	(0 << VENC_VMOD_VMD), VENC_VMOD_VMD);
	venc_modify(sd, VENC_VMOD,
	(1 << VENC_VMOD_TVTYP_SHIFT),
	VENC_VMOD_TVTYP);
	venc_write(sd, VENC_DACTST, 0x0);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

	return 0;
	}

	#define VDAC_CONFIG_HD_V2 0x081141EF
	/*
	* venc_set_480p59_94
	*
	* This function configures the video encoder to EDTV(525p) component setting.
	*/
	static int venc_set_480p59_94(struct v4l2_subdev *sd)
	{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	v4l2_dbg(debug, 2, sd, "venc_set_480p59_94\n");
	if ((pdata->venc_type != VPBE_VERSION_1) &&
	(pdata->venc_type != VPBE_VERSION_2))
	return -EINVAL;

	/* Setup clock at VPSS & VENC for SD */
	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_480P59_94) < 0)
	return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	if (pdata->venc_type == VPBE_VERSION_2)
	vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
	venc_write(sd, VENC_OSDCLK0, 0);
	venc_write(sd, VENC_OSDCLK1, 1);

	if (pdata->venc_type == VPBE_VERSION_1) {
	venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAFRQ,
	VENC_VDPRO_DAFRQ);
	venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAUPS,
	VENC_VDPRO_DAUPS);
	}

	venc_write(sd, VENC_VMOD, 0);
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
	VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
	venc_modify(sd, VENC_VMOD, (HDTV_525P << VENC_VMOD_TVTYP_SHIFT),
	VENC_VMOD_TVTYP);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VDMD_YCBCR8 <<
	VENC_VMOD_VDMD_SHIFT, VENC_VMOD_VDMD);

	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

	return 0;
	}

	/*
	* venc_set_625p
	*
	* This function configures the video encoder to HDTV(625p) component setting
	*/
	static int venc_set_576p50(struct v4l2_subdev *sd)
	{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	v4l2_dbg(debug, 2, sd, "venc_set_576p50\n");

	if ((pdata->venc_type != VPBE_VERSION_1) &&
	(pdata->venc_type != VPBE_VERSION_2))
	return -EINVAL;
	/* Setup clock at VPSS & VENC for SD */
	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_576P50) < 0)
	return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	if (pdata->venc_type == VPBE_VERSION_2)
	vdaccfg_write(sd, VDAC_CONFIG_HD_V2);

	venc_write(sd, VENC_OSDCLK0, 0);
	venc_write(sd, VENC_OSDCLK1, 1);

	if (pdata->venc_type == VPBE_VERSION_1) {
	venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAFRQ,
	VENC_VDPRO_DAFRQ);
	venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAUPS,
	VENC_VDPRO_DAUPS);
	}

	venc_write(sd, VENC_VMOD, 0);
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
	VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
	venc_modify(sd, VENC_VMOD, (HDTV_625P << VENC_VMOD_TVTYP_SHIFT),
	VENC_VMOD_TVTYP);

	venc_modify(sd, VENC_VMOD, VENC_VMOD_VDMD_YCBCR8 <<
	VENC_VMOD_VDMD_SHIFT, VENC_VMOD_VDMD);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);

	return 0;
	}

	/*
	* venc_set_720p60_internal - Setup 720p60 in venc for dm365 only
	*/
	static int venc_set_720p60_internal(struct v4l2_subdev *sd)
	{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_720P60) < 0)
	return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	venc_write(sd, VENC_OSDCLK0, 0);
	venc_write(sd, VENC_OSDCLK1, 1);

	venc_write(sd, VENC_VMOD, 0);
	/* DM365 component HD mode */
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
	VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
	venc_modify(sd, VENC_VMOD, (HDTV_720P << VENC_VMOD_TVTYP_SHIFT),
	VENC_VMOD_TVTYP);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
	venc_write(sd, VENC_XHINTVL, 0);
	return 0;
	}

	/*
	* venc_set_1080i30_internal - Setup 1080i30 in venc for dm365 only
	*/
	static int venc_set_1080i30_internal(struct v4l2_subdev *sd)
	{
	struct venc_state *venc = to_state(sd);
	struct venc_platform_data *pdata = venc->pdata;

	if (pdata->setup_clock(VPBE_ENC_DV_PRESET, V4L2_DV_1080P30) < 0)
	return -EINVAL;

	venc_enabledigitaloutput(sd, 0);

	venc_write(sd, VENC_OSDCLK0, 0);
	venc_write(sd, VENC_OSDCLK1, 1);


	venc_write(sd, VENC_VMOD, 0);
	/* DM365 component HD mode */
	venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
	VENC_VMOD_VIE);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
	venc_modify(sd, VENC_VMOD, (HDTV_1080I << VENC_VMOD_TVTYP_SHIFT),
	VENC_VMOD_TVTYP);
	venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
	venc_write(sd, VENC_XHINTVL, 0);
	return 0;
	}

	static int venc_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm)
	{
	v4l2_dbg(debug, 1, sd, "venc_s_std_output\n");

	if (norm & V4L2_STD_525_60)
	return venc_set_ntsc(sd);
	else if (norm & V4L2_STD_625_50)
	return venc_set_pal(sd);

	return -EINVAL;
	}

	static int venc_s_dv_preset(struct v4l2_subdev *sd,
	struct v4l2_dv_preset *dv_preset)
	{
	struct venc_state *venc = to_state(sd);
	int ret;

	v4l2_dbg(debug, 1, sd, "venc_s_dv_preset\n");

	if (dv_preset->preset == V4L2_DV_576P50)
	return venc_set_576p50(sd);
	else if (dv_preset->preset == V4L2_DV_480P59_94)
	return venc_set_480p59_94(sd);
	else if ((dv_preset->preset == V4L2_DV_720P60) &&
	(venc->pdata->venc_type == VPBE_VERSION_2)) {
	/* TBD setup internal 720p mode here */
	ret = venc_set_720p60_internal(sd);
	/* for DM365 VPBE, there is DAC inside */
	vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
	return ret;
	} else if ((dv_preset->preset == V4L2_DV_1080I30) &&
	(venc->pdata->venc_type == VPBE_VERSION_2)) {
	/* TBD setup internal 1080i mode here */
	ret = venc_set_1080i30_internal(sd);
	/* for DM365 VPBE, there is DAC inside */
	vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
	return ret;
	}
	return -EINVAL;
	}

	static int venc_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
	u32 config)
	{
	struct venc_state *venc = to_state(sd);
	int ret;

	v4l2_dbg(debug, 1, sd, "venc_s_routing\n");

	ret = venc_set_dac(sd, output);
	if (!ret)
	venc->output = output;

	return ret;
	}

	static long venc_ioctl(struct v4l2_subdev *sd,
	unsigned int cmd,
	void *arg)
	{
	u32 val;

	switch (cmd) {
	case VENC_GET_FLD:
	val = venc_read(sd, VENC_VSTAT);
	((int )arg) = ((val & VENC_VSTAT_FIDST) ==
	VENC_VSTAT_FIDST);
	break;
	default:
	v4l2_err(sd, "Wrong IOCTL cmd\n");
	break;
	}

	return 0;
	}

	static const struct v4l2_subdev_core_ops venc_core_ops = {
	.ioctl = venc_ioctl,
	};

	static const struct v4l2_subdev_video_ops venc_video_ops = {
	.s_routing = venc_s_routing,
	.s_std_output = venc_s_std_output,
	.s_dv_preset = venc_s_dv_preset,
	};

	static const struct v4l2_subdev_ops venc_ops = {
	.core = &venc_core_ops,
	.video = &venc_video_ops,
	};

	static int venc_initialize(struct v4l2_subdev *sd)
	{
	struct venc_state *venc = to_state(sd);
	int ret;

	/* Set default to output to composite and std to NTSC */
	venc->output = 0;
	venc->std = V4L2_STD_525_60;

	ret = venc_s_routing(sd, 0, venc->output, 0);
	if (ret < 0) {
	v4l2_err(sd, "Error setting output during init\n");
	return -EINVAL;
	}

	ret = venc_s_std_output(sd, venc->std);
	if (ret < 0) {
	v4l2_err(sd, "Error setting std during init\n");
	return -EINVAL;
	}

	return ret;
	}

	static int venc_device_get(struct device dev, void data)
	{
	struct platform_device *pdev = to_platform_device(dev);
	struct venc_state **venc = data;

	if (strcmp(MODULE_NAME, pdev->name) == 0)
	*venc = platform_get_drvdata(pdev);

	return 0;
	}

	struct v4l2_subdev venc_sub_dev_init(struct v4l2_device v4l2_dev,
	const char *venc_name)
	{
	struct venc_state *venc;
	int err;

	err = bus_for_each_dev(&platform_bus_type, NULL, &venc,
	venc_device_get);
	if (venc == NULL)
	return NULL;

	v4l2_subdev_init(&venc->sd, &venc_ops);

	strcpy(venc->sd.name, venc_name);
	if (v4l2_device_register_subdev(v4l2_dev, &venc->sd) < 0) {
	v4l2_err(v4l2_dev,
	"vpbe unable to register venc sub device\n");
	return NULL;
	}
	if (venc_initialize(&venc->sd)) {
	v4l2_err(v4l2_dev,
	"vpbe venc initialization failed\n");
	return NULL;
	}

	return &venc->sd;
	}
	EXPORT_SYMBOL(venc_sub_dev_init);

	static int venc_probe(struct platform_device *pdev)
	{
	struct venc_state *venc;
	struct resource *res;
	int ret;

	venc = kzalloc(sizeof(struct venc_state), GFP_KERNEL);
	if (venc == NULL)
	return -ENOMEM;

	venc->pdev = &pdev->dev;
	venc->pdata = pdev->dev.platform_data;
	if (NULL == venc->pdata) {
	dev_err(venc->pdev, "Unable to get platform data for"
	" VENC sub device");
	ret = -ENOENT;
	goto free_mem;
	}
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
	dev_err(venc->pdev,
	"Unable to get VENC register address map\n");
	ret = -ENODEV;
	goto free_mem;
	}

	if (!request_mem_region(res->start, resource_size(res), "venc")) {
	dev_err(venc->pdev, "Unable to reserve VENC MMIO region\n");
	ret = -ENODEV;
	goto free_mem;
	}

	venc->venc_base = ioremap_nocache(res->start, resource_size(res));
	if (!venc->venc_base) {
	dev_err(venc->pdev, "Unable to map VENC IO space\n");
	ret = -ENODEV;
	goto release_venc_mem_region;
	}

	if (venc->pdata->venc_type != VPBE_VERSION_1) {
	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!res) {
	dev_err(venc->pdev,
	"Unable to get VDAC_CONFIG address map\n");
	ret = -ENODEV;
	goto unmap_venc_io;
	}

	if (!request_mem_region(res->start,
	resource_size(res), "venc")) {
	dev_err(venc->pdev,
	"Unable to reserve VDAC_CONFIG MMIO region\n");
	ret = -ENODEV;
	goto unmap_venc_io;
	}

	venc->vdaccfg_reg = ioremap_nocache(res->start,
	resource_size(res));
	if (!venc->vdaccfg_reg) {
	dev_err(venc->pdev,
	"Unable to map VDAC_CONFIG IO space\n");
	ret = -ENODEV;
	goto release_vdaccfg_mem_region;
	}
	}
	spin_lock_init(&venc->lock);
	platform_set_drvdata(pdev, venc);
	dev_notice(venc->pdev, "VENC sub device probe success\n");
	return 0;

	release_vdaccfg_mem_region:
	release_mem_region(res->start, resource_size(res));
	unmap_venc_io:
	iounmap(venc->venc_base);
	release_venc_mem_region:
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(res->start, resource_size(res));
	free_mem:
	kfree(venc);
	return ret;
	}

	static int venc_remove(struct platform_device *pdev)
	{
	struct venc_state *venc = platform_get_drvdata(pdev);
	struct resource *res;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	iounmap((void *)venc->venc_base);
	release_mem_region(res->start, resource_size(res));
	if (venc->pdata->venc_type != VPBE_VERSION_1) {
	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	iounmap((void *)venc->vdaccfg_reg);
	release_mem_region(res->start, resource_size(res));
	}
	kfree(venc);

	return 0;
	}

	static struct platform_driver venc_driver = {
	.probe = venc_probe,
	.remove = venc_remove,
	.driver = {
	.name = MODULE_NAME,
	.owner = THIS_MODULE,
	},
	};

	module_platform_driver(venc_driver);

	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("VPBE VENC Driver");
	MODULE_AUTHOR("Texas Instruments");