[deliverable/linux.git] / drivers / video / fbdev / omap2 / omapfb / dss / core.c

/*
 * linux/drivers/video/omap2/dss/core.c
 *
 * Copyright (C) 2009 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
 *
 * Some code and ideas taken from drivers/video/omap/ driver
 * by Imre Deak.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#define DSS_SUBSYS_NAME "CORE"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/io.h>
#include <linux/device.h>
#include <linux/regulator/consumer.h>
#include <linux/suspend.h>
#include <linux/slab.h>

#include <video/omapfb_dss.h>

#include "dss.h"
#include "dss_features.h"

static struct {
	struct platform_device *pdev;

	const char *default_display_name;
} core;

static char *def_disp_name;
module_param_named(def_disp, def_disp_name, charp, 0);
MODULE_PARM_DESC(def_disp, "default display name");

const char *omapdss_get_default_display_name(void)
{
	return core.default_display_name;
}
EXPORT_SYMBOL(omapdss_get_default_display_name);

enum omapdss_version omapdss_get_version(void)
{
	struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
	return pdata->version;
}
EXPORT_SYMBOL(omapdss_get_version);

struct platform_device *dss_get_core_pdev(void)
{
	return core.pdev;
}

int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
{
	struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;

	if (!board_data->dsi_enable_pads)
		return -ENOENT;

	return board_data->dsi_enable_pads(dsi_id, lane_mask);
}

void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
{
	struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;

	if (!board_data->dsi_disable_pads)
		return;

	return board_data->dsi_disable_pads(dsi_id, lane_mask);
}

int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
{
	struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;

	if (pdata->set_min_bus_tput)
		return pdata->set_min_bus_tput(dev, tput);
	else
		return 0;
}

#if defined(CONFIG_FB_OMAP2_DSS_DEBUGFS)
static int dss_debug_show(struct seq_file *s, void *unused)
{
	void (*func)(struct seq_file *) = s->private;
	func(s);
	return 0;
}

static int dss_debug_open(struct inode *inode, struct file *file)
{
	return single_open(file, dss_debug_show, inode->i_private);
}

static const struct file_operations dss_debug_fops = {
	.open           = dss_debug_open,
	.read           = seq_read,
	.llseek         = seq_lseek,
	.release        = single_release,
};

static struct dentry *dss_debugfs_dir;

static int dss_initialize_debugfs(void)
{
	dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
	if (IS_ERR(dss_debugfs_dir)) {
		int err = PTR_ERR(dss_debugfs_dir);
		dss_debugfs_dir = NULL;
		return err;
	}

	debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
			&dss_debug_dump_clocks, &dss_debug_fops);

	return 0;
}

static void dss_uninitialize_debugfs(void)
{
	if (dss_debugfs_dir)
		debugfs_remove_recursive(dss_debugfs_dir);
}

int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
{
	struct dentry *d;

	d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
			write, &dss_debug_fops);

	return PTR_ERR_OR_ZERO(d);
}
#else /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
static inline int dss_initialize_debugfs(void)
{
	return 0;
}
static inline void dss_uninitialize_debugfs(void)
{
}
int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
{
	return 0;
}
#endif /* CONFIG_FB_OMAP2_DSS_DEBUGFS */

/* PLATFORM DEVICE */
static int omap_dss_pm_notif(struct notifier_block *b, unsigned long v, void *d)
{
	DSSDBG("pm notif %lu\n", v);

	switch (v) {
	case PM_SUSPEND_PREPARE:
	case PM_HIBERNATION_PREPARE:
	case PM_RESTORE_PREPARE:
		DSSDBG("suspending displays\n");
		return dss_suspend_all_devices();

	case PM_POST_SUSPEND:
	case PM_POST_HIBERNATION:
	case PM_POST_RESTORE:
		DSSDBG("resuming displays\n");
		return dss_resume_all_devices();

	default:
		return 0;
	}
}

static struct notifier_block omap_dss_pm_notif_block = {
	.notifier_call = omap_dss_pm_notif,
};

static int __init omap_dss_probe(struct platform_device *pdev)
{
	struct omap_dss_board_info *pdata = pdev->dev.platform_data;
	int r;

	core.pdev = pdev;

	dss_features_init(omapdss_get_version());

	r = dss_initialize_debugfs();
	if (r)
		goto err_debugfs;

	if (def_disp_name)
		core.default_display_name = def_disp_name;
	else if (pdata->default_display_name)
		core.default_display_name = pdata->default_display_name;

	register_pm_notifier(&omap_dss_pm_notif_block);

	return 0;

err_debugfs:

	return r;
}

static int omap_dss_remove(struct platform_device *pdev)
{
	unregister_pm_notifier(&omap_dss_pm_notif_block);

	dss_uninitialize_debugfs();

	return 0;
}

static void omap_dss_shutdown(struct platform_device *pdev)
{
	DSSDBG("shutdown\n");
	dss_disable_all_devices();
}

static struct platform_driver omap_dss_driver = {
	.remove         = omap_dss_remove,
	.shutdown	= omap_dss_shutdown,
	.driver         = {
		.name   = "omapdss",
	},
};

/* INIT */
static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
	dss_init_platform_driver,
	dispc_init_platform_driver,
#ifdef CONFIG_FB_OMAP2_DSS_DSI
	dsi_init_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_DPI
	dpi_init_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_SDI
	sdi_init_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_RFBI
	rfbi_init_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_VENC
	venc_init_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP4_DSS_HDMI
	hdmi4_init_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP5_DSS_HDMI
	hdmi5_init_platform_driver,
#endif
};

static void (*dss_output_drv_unreg_funcs[])(void) = {
#ifdef CONFIG_FB_OMAP5_DSS_HDMI
	hdmi5_uninit_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP4_DSS_HDMI
	hdmi4_uninit_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_VENC
	venc_uninit_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_RFBI
	rfbi_uninit_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_SDI
	sdi_uninit_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_DPI
	dpi_uninit_platform_driver,
#endif
#ifdef CONFIG_FB_OMAP2_DSS_DSI
	dsi_uninit_platform_driver,
#endif
	dispc_uninit_platform_driver,
	dss_uninit_platform_driver,
};

static int __init omap_dss_init(void)
{
	int r;
	int i;

	r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
	if (r)
		return r;

	for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
		r = dss_output_drv_reg_funcs[i]();
		if (r)
			goto err_reg;
	}

	return 0;

err_reg:
	for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
			i < ARRAY_SIZE(dss_output_drv_reg_funcs);
			++i)
		dss_output_drv_unreg_funcs[i]();

	platform_driver_unregister(&omap_dss_driver);

	return r;
}

static void __exit omap_dss_exit(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
		dss_output_drv_unreg_funcs[i]();

	platform_driver_unregister(&omap_dss_driver);
}

module_init(omap_dss_init);
module_exit(omap_dss_exit);

MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
f76ee892 TV	1	/*
	2	* linux/drivers/video/omap2/dss/core.c
	3	*
	4	* Copyright (C) 2009 Nokia Corporation
	5	* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
	6	*
	7	* Some code and ideas taken from drivers/video/omap/ driver
	8	* by Imre Deak.
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License version 2 as published by
	12	* the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but WITHOUT
	15	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	17	* more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along with
	20	* this program. If not, see <http://www.gnu.org/licenses/>.
	21	*/
	22
	23	#define DSS_SUBSYS_NAME "CORE"
	24
	25	#include <linux/kernel.h>
	26	#include <linux/module.h>
	27	#include <linux/clk.h>
	28	#include <linux/err.h>
	29	#include <linux/platform_device.h>
	30	#include <linux/seq_file.h>
	31	#include <linux/debugfs.h>
	32	#include <linux/io.h>
	33	#include <linux/device.h>
	34	#include <linux/regulator/consumer.h>
	35	#include <linux/suspend.h>
	36	#include <linux/slab.h>
	37
62d9e44e	38	#include <video/omapfb_dss.h>
f76ee892 TV	39
	40	#include "dss.h"
	41	#include "dss_features.h"
	42
	43	static struct {
	44	struct platform_device *pdev;
	45
	46	const char *default_display_name;
	47	} core;
	48
	49	static char *def_disp_name;
	50	module_param_named(def_disp, def_disp_name, charp, 0);
	51	MODULE_PARM_DESC(def_disp, "default display name");
	52
	53	const char *omapdss_get_default_display_name(void)
	54	{
	55	return core.default_display_name;
	56	}
	57	EXPORT_SYMBOL(omapdss_get_default_display_name);
	58
	59	enum omapdss_version omapdss_get_version(void)
	60	{
	61	struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
	62	return pdata->version;
	63	}
	64	EXPORT_SYMBOL(omapdss_get_version);
	65
	66	struct platform_device *dss_get_core_pdev(void)
	67	{
	68	return core.pdev;
	69	}
	70
	71	int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
	72	{
	73	struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
	74
	75	if (!board_data->dsi_enable_pads)
	76	return -ENOENT;
	77
	78	return board_data->dsi_enable_pads(dsi_id, lane_mask);
	79	}
	80
	81	void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
	82	{
	83	struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
	84
	85	if (!board_data->dsi_disable_pads)
	86	return;
	87
	88	return board_data->dsi_disable_pads(dsi_id, lane_mask);
	89	}
	90
	91	int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
	92	{
	93	struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
	94
	95	if (pdata->set_min_bus_tput)
	96	return pdata->set_min_bus_tput(dev, tput);
	97	else
	98	return 0;
	99	}
	100
35b522cf	101	#if defined(CONFIG_FB_OMAP2_DSS_DEBUGFS)
f76ee892 TV	102	static int dss_debug_show(struct seq_file s, void unused)
	103	{
	104	void (func)(struct seq_file ) = s->private;
	105	func(s);
	106	return 0;
	107	}
	108
	109	static int dss_debug_open(struct inode inode, struct file file)
	110	{
	111	return single_open(file, dss_debug_show, inode->i_private);
	112	}
	113
	114	static const struct file_operations dss_debug_fops = {
	115	.open = dss_debug_open,
	116	.read = seq_read,
	117	.llseek = seq_lseek,
	118	.release = single_release,
	119	};
	120
	121	static struct dentry *dss_debugfs_dir;
	122
	123	static int dss_initialize_debugfs(void)
	124	{
	125	dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
	126	if (IS_ERR(dss_debugfs_dir)) {
	127	int err = PTR_ERR(dss_debugfs_dir);
	128	dss_debugfs_dir = NULL;
	129	return err;
	130	}
	131
	132	debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
	133	&dss_debug_dump_clocks, &dss_debug_fops);
	134
	135	return 0;
	136	}
	137
	138	static void dss_uninitialize_debugfs(void)
	139	{
	140	if (dss_debugfs_dir)
	141	debugfs_remove_recursive(dss_debugfs_dir);
	142	}
	143
	144	int dss_debugfs_create_file(const char name, void (write)(struct seq_file *))
	145	{
	146	struct dentry *d;
	147
	148	d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
	149	write, &dss_debug_fops);
	150
	151	return PTR_ERR_OR_ZERO(d);
	152	}
35b522cf	153	#else /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
f76ee892 TV	154	static inline int dss_initialize_debugfs(void)
	155	{
	156	return 0;
	157	}
	158	static inline void dss_uninitialize_debugfs(void)
	159	{
	160	}
	161	int dss_debugfs_create_file(const char name, void (write)(struct seq_file *))
	162	{
	163	return 0;
	164	}
35b522cf	165	#endif /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
f76ee892 TV	166
	167	/* PLATFORM DEVICE */
	168	static int omap_dss_pm_notif(struct notifier_block b, unsigned long v, void d)
	169	{
	170	DSSDBG("pm notif %lu\n", v);
	171
	172	switch (v) {
	173	case PM_SUSPEND_PREPARE:
	174	case PM_HIBERNATION_PREPARE:
	175	case PM_RESTORE_PREPARE:
	176	DSSDBG("suspending displays\n");
	177	return dss_suspend_all_devices();
	178
	179	case PM_POST_SUSPEND:
	180	case PM_POST_HIBERNATION:
	181	case PM_POST_RESTORE:
	182	DSSDBG("resuming displays\n");
	183	return dss_resume_all_devices();
	184
	185	default:
	186	return 0;
	187	}
	188	}
	189
	190	static struct notifier_block omap_dss_pm_notif_block = {
	191	.notifier_call = omap_dss_pm_notif,
	192	};
	193
	194	static int __init omap_dss_probe(struct platform_device *pdev)
	195	{
	196	struct omap_dss_board_info *pdata = pdev->dev.platform_data;
	197	int r;
	198
	199	core.pdev = pdev;
	200
	201	dss_features_init(omapdss_get_version());
	202
	203	r = dss_initialize_debugfs();
	204	if (r)
	205	goto err_debugfs;
	206
	207	if (def_disp_name)
	208	core.default_display_name = def_disp_name;
	209	else if (pdata->default_display_name)
	210	core.default_display_name = pdata->default_display_name;
f76ee892 TV	211
	212	register_pm_notifier(&omap_dss_pm_notif_block);
	213
	214	return 0;
	215
	216	err_debugfs:
	217
	218	return r;
	219	}
	220
	221	static int omap_dss_remove(struct platform_device *pdev)
	222	{
	223	unregister_pm_notifier(&omap_dss_pm_notif_block);
	224
	225	dss_uninitialize_debugfs();
	226
	227	return 0;
	228	}
	229
	230	static void omap_dss_shutdown(struct platform_device *pdev)
	231	{
	232	DSSDBG("shutdown\n");
	233	dss_disable_all_devices();
	234	}
	235
	236	static struct platform_driver omap_dss_driver = {
	237	.remove = omap_dss_remove,
	238	.shutdown = omap_dss_shutdown,
	239	.driver = {
	240	.name = "omapdss",
	241	},
	242	};
	243
	244	/* INIT */
	245	static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
	246	dss_init_platform_driver,
	247	dispc_init_platform_driver,
35b522cf	248	#ifdef CONFIG_FB_OMAP2_DSS_DSI
f76ee892 TV	249	dsi_init_platform_driver,
f76ee892 TV	250	#endif
35b522cf	251	#ifdef CONFIG_FB_OMAP2_DSS_DPI
f76ee892 TV	252	dpi_init_platform_driver,
f76ee892 TV	253	#endif
35b522cf	254	#ifdef CONFIG_FB_OMAP2_DSS_SDI
f76ee892 TV	255	sdi_init_platform_driver,
f76ee892 TV	256	#endif
35b522cf	257	#ifdef CONFIG_FB_OMAP2_DSS_RFBI
f76ee892 TV	258	rfbi_init_platform_driver,
f76ee892 TV	259	#endif
35b522cf	260	#ifdef CONFIG_FB_OMAP2_DSS_VENC
f76ee892 TV	261	venc_init_platform_driver,
f76ee892 TV	262	#endif
35b522cf	263	#ifdef CONFIG_FB_OMAP4_DSS_HDMI
f76ee892 TV	264	hdmi4_init_platform_driver,
f76ee892 TV	265	#endif
35b522cf	266	#ifdef CONFIG_FB_OMAP5_DSS_HDMI
f76ee892 TV	267	hdmi5_init_platform_driver,
	268	#endif
	269	};
	270
	271	static void (*dss_output_drv_unreg_funcs[])(void) = {
35b522cf	272	#ifdef CONFIG_FB_OMAP5_DSS_HDMI
f76ee892 TV	273	hdmi5_uninit_platform_driver,
f76ee892 TV	274	#endif
35b522cf	275	#ifdef CONFIG_FB_OMAP4_DSS_HDMI
f76ee892 TV	276	hdmi4_uninit_platform_driver,
f76ee892 TV	277	#endif
35b522cf	278	#ifdef CONFIG_FB_OMAP2_DSS_VENC
f76ee892 TV	279	venc_uninit_platform_driver,
f76ee892 TV	280	#endif
35b522cf	281	#ifdef CONFIG_FB_OMAP2_DSS_RFBI
f76ee892 TV	282	rfbi_uninit_platform_driver,
f76ee892 TV	283	#endif
35b522cf	284	#ifdef CONFIG_FB_OMAP2_DSS_SDI
f76ee892 TV	285	sdi_uninit_platform_driver,
f76ee892 TV	286	#endif
35b522cf	287	#ifdef CONFIG_FB_OMAP2_DSS_DPI
f76ee892 TV	288	dpi_uninit_platform_driver,
f76ee892 TV	289	#endif
35b522cf	290	#ifdef CONFIG_FB_OMAP2_DSS_DSI
f76ee892 TV	291	dsi_uninit_platform_driver,
	292	#endif
	293	dispc_uninit_platform_driver,
	294	dss_uninit_platform_driver,
	295	};
	296
	297	static int __init omap_dss_init(void)
	298	{
	299	int r;
	300	int i;
	301
	302	r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
	303	if (r)
	304	return r;
	305
	306	for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
	307	r = dss_output_drv_reg_funcs[i]();
	308	if (r)
	309	goto err_reg;
	310	}
	311
	312	return 0;
	313
	314	err_reg:
	315	for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
	316	i < ARRAY_SIZE(dss_output_drv_reg_funcs);
	317	++i)
	318	dss_output_drv_unreg_funcs[i]();
	319
	320	platform_driver_unregister(&omap_dss_driver);
	321
	322	return r;
	323	}
	324
	325	static void __exit omap_dss_exit(void)
	326	{
	327	int i;
	328
	329	for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
	330	dss_output_drv_unreg_funcs[i]();
	331
	332	platform_driver_unregister(&omap_dss_driver);
	333	}
	334
	335	module_init(omap_dss_init);
	336	module_exit(omap_dss_exit);
	337
	338	MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
	339	MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
	340	MODULE_LICENSE("GPL v2");
	341