| /* |
| * 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; |
| } 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 |
| unsigned int dss_debug; |
| module_param_named(debug, dss_debug, bool, 0644); |
| #endif |
| |
| static int omap_dss_register_device(struct omap_dss_device *); |
| static void omap_dss_unregister_device(struct omap_dss_device *); |
| |
| /* 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; |
| } |
| |
| #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); |
| |
| #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS |
| debugfs_create_file("dispc_irq", S_IRUGO, dss_debugfs_dir, |
| &dispc_dump_irqs, &dss_debug_fops); |
| #endif |
| |
| #if defined(CONFIG_OMAP2_DSS_DSI) && defined(CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS) |
| dsi_create_debugfs_files_irq(dss_debugfs_dir, &dss_debug_fops); |
| #endif |
| |
| debugfs_create_file("dss", S_IRUGO, dss_debugfs_dir, |
| &dss_dump_regs, &dss_debug_fops); |
| debugfs_create_file("dispc", S_IRUGO, dss_debugfs_dir, |
| &dispc_dump_regs, &dss_debug_fops); |
| #ifdef CONFIG_OMAP2_DSS_RFBI |
| debugfs_create_file("rfbi", S_IRUGO, dss_debugfs_dir, |
| &rfbi_dump_regs, &dss_debug_fops); |
| #endif |
| #ifdef CONFIG_OMAP2_DSS_DSI |
| dsi_create_debugfs_files_reg(dss_debugfs_dir, &dss_debug_fops); |
| #endif |
| #ifdef CONFIG_OMAP2_DSS_VENC |
| debugfs_create_file("venc", S_IRUGO, dss_debugfs_dir, |
| &venc_dump_regs, &dss_debug_fops); |
| #endif |
| #ifdef CONFIG_OMAP4_DSS_HDMI |
| debugfs_create_file("hdmi", S_IRUGO, dss_debugfs_dir, |
| &hdmi_dump_regs, &dss_debug_fops); |
| #endif |
| return 0; |
| } |
| |
| static void dss_uninitialize_debugfs(void) |
| { |
| if (dss_debugfs_dir) |
| debugfs_remove_recursive(dss_debugfs_dir); |
| } |
| #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) |
| { |
| } |
| #endif /* CONFIG_DEBUG_FS && CONFIG_OMAP2_DSS_DEBUG_SUPPORT */ |
| |
| /* PLATFORM DEVICE */ |
| static int omap_dss_probe(struct platform_device *pdev) |
| { |
| struct omap_dss_board_info *pdata = pdev->dev.platform_data; |
| int r; |
| int i; |
| |
| core.pdev = pdev; |
| |
| dss_features_init(); |
| |
| dss_init_overlay_managers(pdev); |
| dss_init_overlays(pdev); |
| |
| 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; |
| } |
| |
| r = rfbi_init_platform_driver(); |
| if (r) { |
| DSSERR("Failed to initialize rfbi platform driver\n"); |
| goto err_rfbi; |
| } |
| |
| r = venc_init_platform_driver(); |
| if (r) { |
| DSSERR("Failed to initialize venc platform driver\n"); |
| goto err_venc; |
| } |
| |
| r = dsi_init_platform_driver(); |
| if (r) { |
| DSSERR("Failed to initialize DSI platform driver\n"); |
| goto err_dsi; |
| } |
| |
| r = hdmi_init_platform_driver(); |
| if (r) { |
| DSSERR("Failed to initialize hdmi\n"); |
| goto err_hdmi; |
| } |
| |
| r = dss_initialize_debugfs(); |
| if (r) |
| goto err_debugfs; |
| |
| for (i = 0; i < pdata->num_devices; ++i) { |
| struct omap_dss_device *dssdev = pdata->devices[i]; |
| |
| r = omap_dss_register_device(dssdev); |
| if (r) { |
| DSSERR("device %d %s register failed %d\n", i, |
| dssdev->name ?: "unnamed", r); |
| |
| while (--i >= 0) |
| omap_dss_unregister_device(pdata->devices[i]); |
| |
| goto err_register; |
| } |
| |
| if (def_disp_name && strcmp(def_disp_name, dssdev->name) == 0) |
| pdata->default_device = dssdev; |
| } |
| |
| return 0; |
| |
| err_register: |
| dss_uninitialize_debugfs(); |
| err_debugfs: |
| hdmi_uninit_platform_driver(); |
| err_hdmi: |
| dsi_uninit_platform_driver(); |
| err_dsi: |
| venc_uninit_platform_driver(); |
| err_venc: |
| dispc_uninit_platform_driver(); |
| err_dispc: |
| rfbi_uninit_platform_driver(); |
| err_rfbi: |
| dss_uninit_platform_driver(); |
| err_dss: |
| |
| return r; |
| } |
| |
| static int omap_dss_remove(struct platform_device *pdev) |
| { |
| struct omap_dss_board_info *pdata = pdev->dev.platform_data; |
| int i; |
| |
| dss_uninitialize_debugfs(); |
| |
| hdmi_uninit_platform_driver(); |
| dsi_uninit_platform_driver(); |
| venc_uninit_platform_driver(); |
| rfbi_uninit_platform_driver(); |
| dispc_uninit_platform_driver(); |
| dss_uninit_platform_driver(); |
| |
| dss_uninit_overlays(pdev); |
| dss_uninit_overlay_managers(pdev); |
| |
| for (i = 0; i < pdata->num_devices; ++i) |
| omap_dss_unregister_device(pdata->devices[i]); |
| |
| 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 = { |
| .probe = omap_dss_probe, |
| .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); |
| struct omap_dss_board_info *pdata = core.pdev->dev.platform_data; |
| 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 = pdata->default_device == dssdev; |
| 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; |
| |
| 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); |
| } |
| |
| static int omap_dss_register_device(struct omap_dss_device *dssdev) |
| { |
| static int dev_num; |
| |
| WARN_ON(!dssdev->driver_name); |
| |
| reset_device(&dssdev->dev, 1); |
| dssdev->dev.bus = &dss_bus_type; |
| dssdev->dev.parent = &dss_bus; |
| dssdev->dev.release = omap_dss_dev_release; |
| dev_set_name(&dssdev->dev, "display%d", dev_num++); |
| return device_register(&dssdev->dev); |
| } |
| |
| static void omap_dss_unregister_device(struct omap_dss_device *dssdev) |
| { |
| device_unregister(&dssdev->dev); |
| } |
| |
| /* BUS */ |
| static int 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 */ |
| |
| #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 = platform_driver_register(&omap_dss_driver); |
| 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; |
| } |
| |
| platform_driver_unregister(&omap_dss_driver); |
| |
| 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 platform_driver_register(&omap_dss_driver); |
| } |
| |
| 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"); |
| |