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/*
* 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/omapdss.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");
static bool dss_initialized;
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);
bool omapdss_is_initialized(void)
{
return dss_initialized;
}
EXPORT_SYMBOL(omapdss_is_initialized);
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_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_RET(d);
}
#else /* CONFIG_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_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:
DSSDBG("suspending displays\n");
return dss_suspend_all_devices();
case PM_POST_SUSPEND:
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;
else if (pdata->default_device)
core.default_display_name = pdata->default_device->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",
.owner = THIS_MODULE,
},
};
/* INIT */
static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
#ifdef CONFIG_OMAP2_DSS_DSI
dsi_init_platform_driver,
#endif
#ifdef CONFIG_OMAP2_DSS_DPI
dpi_init_platform_driver,
#endif
#ifdef CONFIG_OMAP2_DSS_SDI
sdi_init_platform_driver,
#endif
#ifdef CONFIG_OMAP2_DSS_RFBI
rfbi_init_platform_driver,
#endif
#ifdef CONFIG_OMAP2_DSS_VENC
venc_init_platform_driver,
#endif
#ifdef CONFIG_OMAP4_DSS_HDMI
hdmi_init_platform_driver,
#endif
};
static void (*dss_output_drv_unreg_funcs[])(void) __exitdata = {
#ifdef CONFIG_OMAP2_DSS_DSI
dsi_uninit_platform_driver,
#endif
#ifdef CONFIG_OMAP2_DSS_DPI
dpi_uninit_platform_driver,
#endif
#ifdef CONFIG_OMAP2_DSS_SDI
sdi_uninit_platform_driver,
#endif
#ifdef CONFIG_OMAP2_DSS_RFBI
rfbi_uninit_platform_driver,
#endif
#ifdef CONFIG_OMAP2_DSS_VENC
venc_uninit_platform_driver,
#endif
#ifdef CONFIG_OMAP4_DSS_HDMI
hdmi_uninit_platform_driver,
#endif
};
static bool dss_output_drv_loaded[ARRAY_SIZE(dss_output_drv_reg_funcs)];
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;
r = dss_init_platform_driver();
if (r) {
DSSERR("Failed to initialize DSS platform driver\n");
goto err_dss;
}
r = dispc_init_platform_driver();
if (r) {
DSSERR("Failed to initialize dispc platform driver\n");
goto err_dispc;
}
/*
* It's ok if the output-driver register fails. It happens, for example,
* when there is no output-device (e.g. SDI for OMAP4).
*/
for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
r = dss_output_drv_reg_funcs[i]();
if (r == 0)
dss_output_drv_loaded[i] = true;
}
dss_initialized = true;
return 0;
err_dispc:
dss_uninit_platform_driver();
err_dss:
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) {
if (dss_output_drv_loaded[i])
dss_output_drv_unreg_funcs[i]();
}
dispc_uninit_platform_driver();
dss_uninit_platform_driver();
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");
|