linux/drivers/video/ti81xx/vpss/core.c

/*
 * linux/drivers/video/ti81xx/vpss/core.c
 *
 * VPSS Core driver for TI 81XX
 *
 * Copyright (C) 2009 TI
 * Author: Yihe Hu <yihehu@ti.com>
 *
 * Some code and ideas taken from drivers/video/omap2/ driver
 * by Tomi Valkeinen.
 *
 * 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; either version 2 of the License, or (at your
 * option) any later version.
 *
 * 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.
 */

#define VPSS_SUBMODULE_NAME  "CORE "

#include <linux/module.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/err.h>
#include <linux/mm.h>

#include <linux/vmalloc.h>

#include "core.h"

#define VPS_DRIVER_NAME  "vpss"



#ifdef DEBUG
unsigned int vpss_debug;
module_param_named(debug, vpss_debug, bool, S_IRUGO);
MODULE_PARM_DESC(vpss_debug, "debug on/off");
#endif
/*module parameters*/
static char *def_mode;
static int  def_tiedvencs;
static char *def_clksrc;
static char *def_sbsize;
static char *def_sbaddr;
/*time out value is 2 seconds*/
static u32  def_timeout = 2000;

static int vps_probe(struct platform_device *pdev)
{
	int r;

	r = vps_sbuf_init(def_sbaddr, def_sbsize);
	if (r) {
		VPSSERR("failed to allocate share buffer\n");
		return r;
	}
	r = vps_fvid2_init(pdev, def_timeout);
	if (r) {
		VPSSERR("Failed to init fvid2 interface,\n");
		goto exit0;
	}
	r = vps_system_init(pdev);
	if (r) {
		VPSSERR("failed to init system\n");
		goto exit1;
	}

	r = vps_dc_init(pdev, def_mode, def_tiedvencs, def_clksrc);
	if (r) {
		VPSSERR("failed to int display controller.\n");
		goto exit2;
	}
	r = vps_grpx_init(pdev);
	if (r) {
		VPSSERR("failed to int graphics.\n");
		goto exit3;

	}
	r = vps_video_init(pdev);
	if (r) {
		VPSSERR("failed to int video.\n");
		goto exit4;
	}
	return 0;

exit4:
	vps_grpx_deinit(pdev);
exit3:
	vps_dc_deinit(pdev);

exit2:
	vps_system_deinit(pdev);
exit1:
	vps_fvid2_deinit(pdev);
exit0:
	vps_sbuf_deinit();
	return r;
}

static int vps_remove(struct platform_device *pdev)
{
	int r;

	vps_video_deinit(pdev);

	vps_grpx_deinit(pdev);
	r = vps_dc_deinit(pdev);
	if (r) {
		VPSSERR("failed to remove display controller.\n");
		return r;
	}
	vps_system_deinit(pdev);
	vps_fvid2_deinit(pdev);

	vps_sbuf_deinit();
	return 0;
}

static struct platform_driver vps_driver = {
	.probe = vps_probe,
	.remove = vps_remove,
	.driver = {
		.name = VPS_DRIVER_NAME,
		.owner = THIS_MODULE,
	},
};

static int __init vps_init(void)
{
	VPSSDBG("core init\n");

	if (platform_driver_register(&vps_driver)) {
		VPSSERR("failed to register ti81xx-vpss driver\n");
		return -ENODEV;
	}
	return 0;
}

static void __exit vps_cleanup(void)
{
	VPSSDBG("core deinit\n");

	platform_driver_unregister(&vps_driver);
}

module_param_named(mode, def_mode, charp, S_IRUGO);
MODULE_PARM_DESC(def_mode,
	"Mode of VENCs to be set in the VPSS device");
module_param_named(tiedvencs, def_tiedvencs, int, S_IRUGO);
MODULE_PARM_DESC(def_tiedvencs,
	"tied vencs to be set in the VPSS device");
module_param_named(clksrc, def_clksrc, charp, S_IRUGO);
MODULE_PARM_DESC(def_clksrc,
	"VENC clock source to be set in the VPSS device");
module_param_named(sbufaddr, def_sbaddr, charp, S_IRUGO);
MODULE_PARM_DESC(def_pladdr,
	"sharing buffer address to be set in the VPSS device");
module_param_named(sbufsize, def_sbsize, charp, S_IRUGO);
MODULE_PARM_DESC(def_plsize,
	"sharing buffer size to be set in the VPSS device");
module_param_named(timeout, def_timeout, uint, S_IRUGO);
MODULE_PARM_DESC(def_timeout,
	"timeout value to be set in the VPSS device \
		for waiting the response from M3");

subsys_initcall(vps_init);
module_exit(vps_cleanup);


MODULE_AUTHOR("Yihe Hu <yihehu@ti.com");
MODULE_DESCRIPTION("TI81XX Video Processing Subsystem");
MODULE_LICENSE("GPL v2");