325 lines
7.0 KiB
C
325 lines
7.0 KiB
C
/*
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* linux/drivers/video/omap2/dss/core.c
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*
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* Copyright (C) 2009 Nokia Corporation
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* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
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*
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* Some code and ideas taken from drivers/video/omap/ driver
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* by Imre Deak.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define DSS_SUBSYS_NAME "CORE"
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/seq_file.h>
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#include <linux/debugfs.h>
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#include <linux/io.h>
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#include <linux/device.h>
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#include <linux/regulator/consumer.h>
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#include <linux/suspend.h>
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#include <linux/slab.h>
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#include "omapdss.h"
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#include "dss.h"
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#include "dss_features.h"
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static struct {
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struct platform_device *pdev;
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const char *default_display_name;
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} core;
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static char *def_disp_name;
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module_param_named(def_disp, def_disp_name, charp, 0);
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MODULE_PARM_DESC(def_disp, "default display name");
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const char *omapdss_get_default_display_name(void)
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{
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return core.default_display_name;
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}
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EXPORT_SYMBOL(omapdss_get_default_display_name);
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enum omapdss_version omapdss_get_version(void)
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{
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struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
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return pdata->version;
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}
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EXPORT_SYMBOL(omapdss_get_version);
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struct platform_device *dss_get_core_pdev(void)
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{
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return core.pdev;
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}
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int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
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{
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struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
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if (!board_data->dsi_enable_pads)
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return -ENOENT;
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return board_data->dsi_enable_pads(dsi_id, lane_mask);
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}
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void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
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{
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struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
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if (!board_data->dsi_disable_pads)
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return;
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return board_data->dsi_disable_pads(dsi_id, lane_mask);
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}
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int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
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{
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struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
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if (pdata->set_min_bus_tput)
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return pdata->set_min_bus_tput(dev, tput);
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else
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return 0;
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}
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#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
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static int dss_debug_show(struct seq_file *s, void *unused)
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{
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void (*func)(struct seq_file *) = s->private;
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func(s);
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return 0;
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}
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static int dss_debug_open(struct inode *inode, struct file *file)
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{
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return single_open(file, dss_debug_show, inode->i_private);
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}
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static const struct file_operations dss_debug_fops = {
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.open = dss_debug_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct dentry *dss_debugfs_dir;
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static int dss_initialize_debugfs(void)
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{
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dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
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if (IS_ERR(dss_debugfs_dir)) {
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int err = PTR_ERR(dss_debugfs_dir);
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dss_debugfs_dir = NULL;
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return err;
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}
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debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
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&dss_debug_dump_clocks, &dss_debug_fops);
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return 0;
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}
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static void dss_uninitialize_debugfs(void)
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{
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if (dss_debugfs_dir)
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debugfs_remove_recursive(dss_debugfs_dir);
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}
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int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
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{
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struct dentry *d;
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d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
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write, &dss_debug_fops);
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return PTR_ERR_OR_ZERO(d);
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}
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#else /* CONFIG_OMAP2_DSS_DEBUGFS */
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static inline int dss_initialize_debugfs(void)
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{
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return 0;
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}
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static inline void dss_uninitialize_debugfs(void)
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{
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}
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int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
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{
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return 0;
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}
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#endif /* CONFIG_OMAP2_DSS_DEBUGFS */
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/* PLATFORM DEVICE */
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static void dss_disable_all_devices(void)
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{
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struct omap_dss_device *dssdev = NULL;
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for_each_dss_dev(dssdev) {
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if (!dssdev->driver)
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continue;
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if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
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dssdev->driver->disable(dssdev);
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}
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}
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static int __init omap_dss_probe(struct platform_device *pdev)
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{
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struct omap_dss_board_info *pdata = pdev->dev.platform_data;
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int r;
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core.pdev = pdev;
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dss_features_init(omapdss_get_version());
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r = dss_initialize_debugfs();
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if (r)
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goto err_debugfs;
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if (def_disp_name)
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core.default_display_name = def_disp_name;
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else if (pdata->default_display_name)
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core.default_display_name = pdata->default_display_name;
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return 0;
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err_debugfs:
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return r;
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}
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static int omap_dss_remove(struct platform_device *pdev)
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{
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dss_uninitialize_debugfs();
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return 0;
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}
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static void omap_dss_shutdown(struct platform_device *pdev)
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{
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DSSDBG("shutdown\n");
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dss_disable_all_devices();
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}
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static struct platform_driver omap_dss_driver = {
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.remove = omap_dss_remove,
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.shutdown = omap_dss_shutdown,
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.driver = {
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.name = "omapdss",
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},
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};
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/* INIT */
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static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
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dss_init_platform_driver,
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dispc_init_platform_driver,
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#ifdef CONFIG_OMAP2_DSS_DSI
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dsi_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_DPI
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dpi_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_SDI
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sdi_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_RFBI
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rfbi_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_VENC
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venc_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP4_DSS_HDMI
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hdmi4_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP5_DSS_HDMI
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hdmi5_init_platform_driver,
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#endif
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};
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static void (*dss_output_drv_unreg_funcs[])(void) = {
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#ifdef CONFIG_OMAP5_DSS_HDMI
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hdmi5_uninit_platform_driver,
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#endif
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#ifdef CONFIG_OMAP4_DSS_HDMI
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hdmi4_uninit_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_VENC
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venc_uninit_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_RFBI
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rfbi_uninit_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_SDI
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sdi_uninit_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_DPI
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dpi_uninit_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_DSI
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dsi_uninit_platform_driver,
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#endif
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dispc_uninit_platform_driver,
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dss_uninit_platform_driver,
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};
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static int __init omap_dss_init(void)
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{
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int r;
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int i;
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r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
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if (r)
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return r;
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for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
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r = dss_output_drv_reg_funcs[i]();
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if (r)
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goto err_reg;
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}
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return 0;
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err_reg:
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for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
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i < ARRAY_SIZE(dss_output_drv_reg_funcs);
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++i)
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dss_output_drv_unreg_funcs[i]();
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platform_driver_unregister(&omap_dss_driver);
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return r;
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}
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static void __exit omap_dss_exit(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
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dss_output_drv_unreg_funcs[i]();
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platform_driver_unregister(&omap_dss_driver);
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}
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module_init(omap_dss_init);
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module_exit(omap_dss_exit);
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MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
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MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
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MODULE_LICENSE("GPL v2");
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