blob: 5066eee10ccf78b641044e4541c022229617dbfc [file] [log] [blame]
/*
* 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 <video/omapdss.h>
#include "dss.h"
#include "dss_features.h"
static struct {
struct platform_device *pdev;
struct regulator *vdds_dsi_reg;
struct regulator *vdds_sdi_reg;
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");
#ifdef DEBUG
bool dss_debug;
module_param_named(debug, dss_debug, bool, 0644);
#endif
/* REGULATORS */
struct regulator *dss_get_vdds_dsi(void)
{
struct regulator *reg;
if (core.vdds_dsi_reg != NULL)
return core.vdds_dsi_reg;
reg = regulator_get(&core.pdev->dev, "vdds_dsi");
if (!IS_ERR(reg))
core.vdds_dsi_reg = reg;
return reg;
}
struct regulator *dss_get_vdds_sdi(void)
{
struct regulator *reg;
if (core.vdds_sdi_reg != NULL)
return core.vdds_sdi_reg;
reg = regulator_get(&core.pdev->dev, "vdds_sdi");
if (!IS_ERR(reg))
core.vdds_sdi_reg = reg;
return reg;
}
int dss_get_ctx_loss_count(struct device *dev)
{
struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
int cnt;
if (!board_data->get_context_loss_count)
return -ENOENT;
cnt = board_data->get_context_loss_count(dev);
WARN_ONCE(cnt < 0, "get_context_loss_count failed: %d\n", cnt);
return cnt;
}
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_enable_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_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT)
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);
if (IS_ERR(d))
return PTR_ERR(d);
return 0;
}
#else /* CONFIG_DEBUG_FS && CONFIG_OMAP2_DSS_DEBUG_SUPPORT */
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_DEBUG_FS && CONFIG_OMAP2_DSS_DEBUG_SUPPORT */
/* PLATFORM DEVICE */
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();
dss_apply_init();
dss_init_overlay_managers(pdev);
dss_init_overlays(pdev);
r = dss_initialize_debugfs();
if (r)
goto err_debugfs;
if (def_disp_name)
core.default_display_name = def_disp_name;
else if (pdata->default_device)
core.default_display_name = pdata->default_device->name;
return 0;
err_debugfs:
return r;
}
static int omap_dss_remove(struct platform_device *pdev)
{
dss_uninitialize_debugfs();
dss_uninit_overlays(pdev);
dss_uninit_overlay_managers(pdev);
return 0;
}
static void omap_dss_shutdown(struct platform_device *pdev)
{
DSSDBG("shutdown\n");
dss_disable_all_devices();
}
static int omap_dss_suspend(struct platform_device *pdev, pm_message_t state)
{
DSSDBG("suspend %d\n", state.event);
return dss_suspend_all_devices();
}
static int omap_dss_resume(struct platform_device *pdev)
{
DSSDBG("resume\n");
return dss_resume_all_devices();
}
static struct platform_driver omap_dss_driver = {
.remove = omap_dss_remove,
.shutdown = omap_dss_shutdown,
.suspend = omap_dss_suspend,
.resume = omap_dss_resume,
.driver = {
.name = "omapdss",
.owner = THIS_MODULE,
},
};
/* BUS */
static int dss_bus_match(struct device *dev, struct device_driver *driver)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
DSSDBG("bus_match. dev %s/%s, drv %s\n",
dev_name(dev), dssdev->driver_name, driver->name);
return strcmp(dssdev->driver_name, driver->name) == 0;
}
static ssize_t device_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
return snprintf(buf, PAGE_SIZE, "%s\n",
dssdev->name ?
dssdev->name : "");
}
static struct device_attribute default_dev_attrs[] = {
__ATTR(name, S_IRUGO, device_name_show, NULL),
__ATTR_NULL,
};
static ssize_t driver_name_show(struct device_driver *drv, char *buf)
{
struct omap_dss_driver *dssdrv = to_dss_driver(drv);
return snprintf(buf, PAGE_SIZE, "%s\n",
dssdrv->driver.name ?
dssdrv->driver.name : "");
}
static struct driver_attribute default_drv_attrs[] = {
__ATTR(name, S_IRUGO, driver_name_show, NULL),
__ATTR_NULL,
};
static struct bus_type dss_bus_type = {
.name = "omapdss",
.match = dss_bus_match,
.dev_attrs = default_dev_attrs,
.drv_attrs = default_drv_attrs,
};
static void dss_bus_release(struct device *dev)
{
DSSDBG("bus_release\n");
}
static struct device dss_bus = {
.release = dss_bus_release,
};
struct bus_type *dss_get_bus(void)
{
return &dss_bus_type;
}
/* DRIVER */
static int dss_driver_probe(struct device *dev)
{
int r;
struct omap_dss_driver *dssdrv = to_dss_driver(dev->driver);
struct omap_dss_device *dssdev = to_dss_device(dev);
bool force;
DSSDBG("driver_probe: dev %s/%s, drv %s\n",
dev_name(dev), dssdev->driver_name,
dssdrv->driver.name);
dss_init_device(core.pdev, dssdev);
force = core.default_display_name &&
strcmp(core.default_display_name, dssdev->name) == 0;
dss_recheck_connections(dssdev, force);
r = dssdrv->probe(dssdev);
if (r) {
DSSERR("driver probe failed: %d\n", r);
dss_uninit_device(core.pdev, dssdev);
return r;
}
DSSDBG("probe done for device %s\n", dev_name(dev));
dssdev->driver = dssdrv;
return 0;
}
static int dss_driver_remove(struct device *dev)
{
struct omap_dss_driver *dssdrv = to_dss_driver(dev->driver);
struct omap_dss_device *dssdev = to_dss_device(dev);
DSSDBG("driver_remove: dev %s/%s\n", dev_name(dev),
dssdev->driver_name);
dssdrv->remove(dssdev);
dss_uninit_device(core.pdev, dssdev);
dssdev->driver = NULL;
return 0;
}
int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
{
dssdriver->driver.bus = &dss_bus_type;
dssdriver->driver.probe = dss_driver_probe;
dssdriver->driver.remove = dss_driver_remove;
if (dssdriver->get_resolution == NULL)
dssdriver->get_resolution = omapdss_default_get_resolution;
if (dssdriver->get_recommended_bpp == NULL)
dssdriver->get_recommended_bpp =
omapdss_default_get_recommended_bpp;
if (dssdriver->get_timings == NULL)
dssdriver->get_timings = omapdss_default_get_timings;
return driver_register(&dssdriver->driver);
}
EXPORT_SYMBOL(omap_dss_register_driver);
void omap_dss_unregister_driver(struct omap_dss_driver *dssdriver)
{
driver_unregister(&dssdriver->driver);
}
EXPORT_SYMBOL(omap_dss_unregister_driver);
/* DEVICE */
static void reset_device(struct device *dev, int check)
{
u8 *dev_p = (u8 *)dev;
u8 *dev_end = dev_p + sizeof(*dev);
void *saved_pdata;
saved_pdata = dev->platform_data;
if (check) {
/*
* Check if there is any other setting than platform_data
* in struct device; warn that these will be reset by our
* init.
*/
dev->platform_data = NULL;
while (dev_p < dev_end) {
if (*dev_p) {
WARN("%s: struct device fields will be "
"discarded\n",
__func__);
break;
}
dev_p++;
}
}
memset(dev, 0, sizeof(*dev));
dev->platform_data = saved_pdata;
}
static void omap_dss_dev_release(struct device *dev)
{
reset_device(dev, 0);
}
int omap_dss_register_device(struct omap_dss_device *dssdev,
struct device *parent, int disp_num)
{
WARN_ON(!dssdev->driver_name);
reset_device(&dssdev->dev, 1);
dssdev->dev.bus = &dss_bus_type;
dssdev->dev.parent = parent;
dssdev->dev.release = omap_dss_dev_release;
dev_set_name(&dssdev->dev, "display%d", disp_num);
return device_register(&dssdev->dev);
}
void omap_dss_unregister_device(struct omap_dss_device *dssdev)
{
device_unregister(&dssdev->dev);
}
static int dss_unregister_dss_dev(struct device *dev, void *data)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
omap_dss_unregister_device(dssdev);
return 0;
}
void omap_dss_unregister_child_devices(struct device *parent)
{
device_for_each_child(parent, NULL, dss_unregister_dss_dev);
}
/* BUS */
static int __init omap_dss_bus_register(void)
{
int r;
r = bus_register(&dss_bus_type);
if (r) {
DSSERR("bus register failed\n");
return r;
}
dev_set_name(&dss_bus, "omapdss");
r = device_register(&dss_bus);
if (r) {
DSSERR("bus driver register failed\n");
bus_unregister(&dss_bus_type);
return r;
}
return 0;
}
/* INIT */
static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
#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_OMAP2_DSS_DSI
dsi_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_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_OMAP2_DSS_DSI
dsi_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_register_drivers(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;
}
return 0;
err_dispc:
dss_uninit_platform_driver();
err_dss:
platform_driver_unregister(&omap_dss_driver);
return r;
}
static void __exit omap_dss_unregister_drivers(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);
}
#ifdef CONFIG_OMAP2_DSS_MODULE
static void omap_dss_bus_unregister(void)
{
device_unregister(&dss_bus);
bus_unregister(&dss_bus_type);
}
static int __init omap_dss_init(void)
{
int r;
r = omap_dss_bus_register();
if (r)
return r;
r = omap_dss_register_drivers();
if (r) {
omap_dss_bus_unregister();
return r;
}
return 0;
}
static void __exit omap_dss_exit(void)
{
if (core.vdds_dsi_reg != NULL) {
regulator_put(core.vdds_dsi_reg);
core.vdds_dsi_reg = NULL;
}
if (core.vdds_sdi_reg != NULL) {
regulator_put(core.vdds_sdi_reg);
core.vdds_sdi_reg = NULL;
}
omap_dss_unregister_drivers();
omap_dss_bus_unregister();
}
module_init(omap_dss_init);
module_exit(omap_dss_exit);
#else
static int __init omap_dss_init(void)
{
return omap_dss_bus_register();
}
static int __init omap_dss_init2(void)
{
return omap_dss_register_drivers();
}
core_initcall(omap_dss_init);
device_initcall(omap_dss_init2);
#endif
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
MODULE_LICENSE("GPL v2");