| /* |
| * Copyright (C) 2014-2015 Broadcom |
| * Copyright (C) 2013 Red Hat |
| * |
| * 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. |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/component.h> |
| #include <linux/device.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| #include <linux/of_platform.h> |
| #include <linux/platform_device.h> |
| |
| #include "vc4_drv.h" |
| #include "vc4_regs.h" |
| |
| #define DRIVER_NAME "vc4" |
| #define DRIVER_DESC "Broadcom VC4 graphics" |
| #define DRIVER_DATE "20140616" |
| #define DRIVER_MAJOR 0 |
| #define DRIVER_MINOR 0 |
| #define DRIVER_PATCHLEVEL 0 |
| |
| /* Helper function for mapping the regs on a platform device. */ |
| void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index) |
| { |
| struct resource *res; |
| void __iomem *map; |
| |
| res = platform_get_resource(dev, IORESOURCE_MEM, index); |
| map = devm_ioremap_resource(&dev->dev, res); |
| if (IS_ERR(map)) { |
| DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map)); |
| return map; |
| } |
| |
| return map; |
| } |
| |
| static void vc4_drm_preclose(struct drm_device *dev, struct drm_file *file) |
| { |
| struct drm_crtc *crtc; |
| |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) |
| vc4_cancel_page_flip(crtc, file); |
| } |
| |
| static const struct file_operations vc4_drm_fops = { |
| .owner = THIS_MODULE, |
| .open = drm_open, |
| .release = drm_release, |
| .unlocked_ioctl = drm_ioctl, |
| .mmap = drm_gem_cma_mmap, |
| .poll = drm_poll, |
| .read = drm_read, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = drm_compat_ioctl, |
| #endif |
| .llseek = noop_llseek, |
| }; |
| |
| static const struct drm_ioctl_desc vc4_drm_ioctls[] = { |
| }; |
| |
| static struct drm_driver vc4_drm_driver = { |
| .driver_features = (DRIVER_MODESET | |
| DRIVER_ATOMIC | |
| DRIVER_GEM | |
| DRIVER_PRIME), |
| .preclose = vc4_drm_preclose, |
| |
| .enable_vblank = vc4_enable_vblank, |
| .disable_vblank = vc4_disable_vblank, |
| .get_vblank_counter = drm_vblank_count, |
| |
| #if defined(CONFIG_DEBUG_FS) |
| .debugfs_init = vc4_debugfs_init, |
| .debugfs_cleanup = vc4_debugfs_cleanup, |
| #endif |
| |
| .gem_free_object = drm_gem_cma_free_object, |
| .gem_vm_ops = &drm_gem_cma_vm_ops, |
| |
| .prime_handle_to_fd = drm_gem_prime_handle_to_fd, |
| .prime_fd_to_handle = drm_gem_prime_fd_to_handle, |
| .gem_prime_import = drm_gem_prime_import, |
| .gem_prime_export = drm_gem_prime_export, |
| .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, |
| .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, |
| .gem_prime_vmap = drm_gem_cma_prime_vmap, |
| .gem_prime_vunmap = drm_gem_cma_prime_vunmap, |
| .gem_prime_mmap = drm_gem_cma_prime_mmap, |
| |
| .dumb_create = vc4_dumb_create, |
| .dumb_map_offset = drm_gem_cma_dumb_map_offset, |
| .dumb_destroy = drm_gem_dumb_destroy, |
| |
| .ioctls = vc4_drm_ioctls, |
| .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), |
| .fops = &vc4_drm_fops, |
| |
| .name = DRIVER_NAME, |
| .desc = DRIVER_DESC, |
| .date = DRIVER_DATE, |
| .major = DRIVER_MAJOR, |
| .minor = DRIVER_MINOR, |
| .patchlevel = DRIVER_PATCHLEVEL, |
| }; |
| |
| static int compare_dev(struct device *dev, void *data) |
| { |
| return dev == data; |
| } |
| |
| static void vc4_match_add_drivers(struct device *dev, |
| struct component_match **match, |
| struct platform_driver *const *drivers, |
| int count) |
| { |
| int i; |
| |
| for (i = 0; i < count; i++) { |
| struct device_driver *drv = &drivers[i]->driver; |
| struct device *p = NULL, *d; |
| |
| while ((d = bus_find_device(&platform_bus_type, p, drv, |
| (void *)platform_bus_type.match))) { |
| put_device(p); |
| component_match_add(dev, match, compare_dev, d); |
| p = d; |
| } |
| put_device(p); |
| } |
| } |
| |
| static int vc4_drm_bind(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| struct drm_device *drm; |
| struct drm_connector *connector; |
| struct vc4_dev *vc4; |
| int ret = 0; |
| |
| dev->coherent_dma_mask = DMA_BIT_MASK(32); |
| |
| vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); |
| if (!vc4) |
| return -ENOMEM; |
| |
| drm = drm_dev_alloc(&vc4_drm_driver, dev); |
| if (!drm) |
| return -ENOMEM; |
| platform_set_drvdata(pdev, drm); |
| vc4->dev = drm; |
| drm->dev_private = vc4; |
| |
| drm_dev_set_unique(drm, dev_name(dev)); |
| |
| drm_mode_config_init(drm); |
| if (ret) |
| goto unref; |
| |
| ret = component_bind_all(dev, drm); |
| if (ret) |
| goto unref; |
| |
| ret = drm_dev_register(drm, 0); |
| if (ret < 0) |
| goto unbind_all; |
| |
| /* Connector registration has to occur after DRM device |
| * registration, because it creates sysfs entries based on the |
| * DRM device. |
| */ |
| list_for_each_entry(connector, &drm->mode_config.connector_list, head) { |
| ret = drm_connector_register(connector); |
| if (ret) |
| goto unregister; |
| } |
| |
| vc4_kms_load(drm); |
| |
| return 0; |
| |
| unregister: |
| drm_dev_unregister(drm); |
| unbind_all: |
| component_unbind_all(dev, drm); |
| unref: |
| drm_dev_unref(drm); |
| return ret; |
| } |
| |
| static void vc4_drm_unbind(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| struct drm_device *drm = platform_get_drvdata(pdev); |
| |
| drm_mode_config_cleanup(drm); |
| |
| drm_put_dev(drm); |
| } |
| |
| static const struct component_master_ops vc4_drm_ops = { |
| .bind = vc4_drm_bind, |
| .unbind = vc4_drm_unbind, |
| }; |
| |
| static struct platform_driver *const component_drivers[] = { |
| &vc4_hdmi_driver, |
| &vc4_crtc_driver, |
| &vc4_hvs_driver, |
| }; |
| |
| static int vc4_platform_drm_probe(struct platform_device *pdev) |
| { |
| struct component_match *match = NULL; |
| struct device *dev = &pdev->dev; |
| |
| vc4_match_add_drivers(dev, &match, |
| component_drivers, ARRAY_SIZE(component_drivers)); |
| |
| return component_master_add_with_match(dev, &vc4_drm_ops, match); |
| } |
| |
| static int vc4_platform_drm_remove(struct platform_device *pdev) |
| { |
| component_master_del(&pdev->dev, &vc4_drm_ops); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id vc4_of_match[] = { |
| { .compatible = "brcm,bcm2835-vc4", }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, vc4_of_match); |
| |
| static struct platform_driver vc4_platform_driver = { |
| .probe = vc4_platform_drm_probe, |
| .remove = vc4_platform_drm_remove, |
| .driver = { |
| .name = "vc4-drm", |
| .owner = THIS_MODULE, |
| .of_match_table = vc4_of_match, |
| }, |
| }; |
| |
| static int __init vc4_drm_register(void) |
| { |
| int i, ret; |
| |
| for (i = 0; i < ARRAY_SIZE(component_drivers); i++) { |
| ret = platform_driver_register(component_drivers[i]); |
| if (ret) { |
| while (--i >= 0) |
| platform_driver_unregister(component_drivers[i]); |
| return ret; |
| } |
| } |
| return platform_driver_register(&vc4_platform_driver); |
| } |
| |
| static void __exit vc4_drm_unregister(void) |
| { |
| int i; |
| |
| for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--) |
| platform_driver_unregister(component_drivers[i]); |
| |
| platform_driver_unregister(&vc4_platform_driver); |
| } |
| |
| module_init(vc4_drm_register); |
| module_exit(vc4_drm_unregister); |
| |
| MODULE_ALIAS("platform:vc4-drm"); |
| MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); |
| MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); |
| MODULE_LICENSE("GPL v2"); |