| /* |
| * 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; |
| |
| struct regulator *vdds_dsi_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"); |
| |
| 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; |
| } |
| |
| /* REGULATORS */ |
| |
| struct regulator *dss_get_vdds_dsi(void) |
| { |
| struct regulator *reg; |
| |
| if (core.vdds_dsi_reg != NULL) |
| return core.vdds_dsi_reg; |
| |
| reg = devm_regulator_get(&core.pdev->dev, "vdds_dsi"); |
| if (!IS_ERR(reg)) |
| core.vdds_dsi_reg = reg; |
| |
| return reg; |
| } |
| |
| 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, |
| }, |
| }; |
| |
| /* 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 struct bus_type dss_bus_type = { |
| .name = "omapdss", |
| .match = dss_bus_match, |
| }; |
| |
| 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); |
| |
| DSSDBG("driver_probe: dev %s/%s, drv %s\n", |
| dev_name(dev), dssdev->driver_name, |
| dssdrv->driver.name); |
| |
| r = dssdrv->probe(dssdev); |
| |
| if (r) { |
| DSSERR("driver probe failed: %d\n", r); |
| 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); |
| |
| dssdev->driver = NULL; |
| |
| return 0; |
| } |
| |
| static int omapdss_default_connect(struct omap_dss_device *dssdev) |
| { |
| struct omap_dss_device *out; |
| struct omap_overlay_manager *mgr; |
| int r; |
| |
| out = dssdev->output; |
| |
| if (out == NULL) |
| return -ENODEV; |
| |
| mgr = omap_dss_get_overlay_manager(out->dispc_channel); |
| if (!mgr) |
| return -ENODEV; |
| |
| r = dss_mgr_connect(mgr, out); |
| if (r) |
| return r; |
| |
| return 0; |
| } |
| |
| static void omapdss_default_disconnect(struct omap_dss_device *dssdev) |
| { |
| struct omap_dss_device *out; |
| struct omap_overlay_manager *mgr; |
| |
| out = dssdev->output; |
| |
| if (out == NULL) |
| return; |
| |
| mgr = out->manager; |
| |
| if (mgr == NULL) |
| return; |
| |
| dss_mgr_disconnect(mgr, out); |
| } |
| |
| 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; |
| if (dssdriver->connect == NULL) |
| dssdriver->connect = omapdss_default_connect; |
| if (dssdriver->disconnect == NULL) |
| dssdriver->disconnect = omapdss_default_disconnect; |
| |
| 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 omap_dss_dev_release(struct device *dev) |
| { |
| struct omap_dss_device *dssdev = to_dss_device(dev); |
| kfree(dssdev); |
| } |
| |
| static int disp_num_counter; |
| |
| struct omap_dss_device *dss_alloc_and_init_device(struct device *parent) |
| { |
| struct omap_dss_device *dssdev; |
| |
| dssdev = kzalloc(sizeof(*dssdev), GFP_KERNEL); |
| if (!dssdev) |
| return NULL; |
| |
| dssdev->old_dev.bus = &dss_bus_type; |
| dssdev->old_dev.parent = parent; |
| dssdev->old_dev.release = omap_dss_dev_release; |
| dev_set_name(&dssdev->old_dev, "display%d", disp_num_counter++); |
| |
| device_initialize(&dssdev->old_dev); |
| |
| return dssdev; |
| } |
| |
| int dss_add_device(struct omap_dss_device *dssdev) |
| { |
| dssdev->dev = &dssdev->old_dev; |
| |
| omapdss_register_display(dssdev); |
| return device_add(&dssdev->old_dev); |
| } |
| |
| void dss_put_device(struct omap_dss_device *dssdev) |
| { |
| put_device(&dssdev->old_dev); |
| } |
| |
| void dss_unregister_device(struct omap_dss_device *dssdev) |
| { |
| device_unregister(&dssdev->old_dev); |
| omapdss_unregister_display(dssdev); |
| } |
| |
| static int dss_unregister_dss_dev(struct device *dev, void *data) |
| { |
| struct omap_dss_device *dssdev = to_dss_device(dev); |
| dss_unregister_device(dssdev); |
| return 0; |
| } |
| |
| void dss_unregister_child_devices(struct device *parent) |
| { |
| device_for_each_child(parent, NULL, dss_unregister_dss_dev); |
| } |
| |
| void dss_copy_device_pdata(struct omap_dss_device *dst, |
| const struct omap_dss_device *src) |
| { |
| u8 *d = (u8 *)dst; |
| u8 *s = (u8 *)src; |
| size_t dsize = sizeof(struct device); |
| |
| memcpy(d + dsize, s + dsize, sizeof(struct omap_dss_device) - dsize); |
| } |
| |
| /* 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_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_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; |
| } |
| |
| dss_initialized = true; |
| |
| return 0; |
| } |
| |
| static void __exit omap_dss_exit(void) |
| { |
| 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) |
| { |
| int r; |
| |
| r = omap_dss_register_drivers(); |
| if (r) |
| return r; |
| |
| dss_initialized = true; |
| |
| return 0; |
| } |
| |
| 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"); |
| |