| /* -*- mode: c; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ |
| /* vi: set ts=8 sw=8 sts=8: */ |
| /*************************************************************************/ /*! |
| @File |
| @Title PowerVR DRM platform driver |
| @Codingstyle LinuxKernel |
| @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved |
| @License Dual MIT/GPLv2 |
| |
| The contents of this file are subject to the MIT license as set out below. |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), to deal |
| in the Software without restriction, including without limitation the rights |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| copies of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included in |
| all copies or substantial portions of the Software. |
| |
| Alternatively, the contents of this file may be used under the terms of |
| the GNU General Public License Version 2 ("GPL") in which case the provisions |
| of GPL are applicable instead of those above. |
| |
| If you wish to allow use of your version of this file only under the terms of |
| GPL, and not to allow others to use your version of this file under the terms |
| of the MIT license, indicate your decision by deleting the provisions above |
| and replace them with the notice and other provisions required by GPL as set |
| out in the file called "GPL-COPYING" included in this distribution. If you do |
| not delete the provisions above, a recipient may use your version of this file |
| under the terms of either the MIT license or GPL. |
| |
| This License is also included in this distribution in the file called |
| "MIT-COPYING". |
| |
| EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS |
| PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
| BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR |
| PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR |
| COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER |
| IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ /**************************************************************************/ |
| |
| #include <drm/drmP.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/version.h> |
| |
| #include "module_common.h" |
| #include "pvr_drv.h" |
| #include "pvrmodule.h" |
| #include "sysinfo.h" |
| |
| /* This header must always be included last */ |
| #include "kernel_compatibility.h" |
| |
| static struct drm_driver pvr_drm_platform_driver; |
| |
| #if defined(MODULE) && !defined(PVR_LDM_PLATFORM_PRE_REGISTERED) |
| /* |
| * This is an arbitrary value. If it's changed then the 'num_devices' module |
| * parameter description should also be updated to match. |
| */ |
| #define MAX_DEVICES 16 |
| |
| static unsigned int pvr_num_devices = 1; |
| static struct platform_device **pvr_devices; |
| |
| #if defined(NO_HARDWARE) |
| static int pvr_num_devices_set(const char *val, |
| const struct kernel_param *param) |
| { |
| int err; |
| |
| err = param_set_uint(val, param); |
| if (err) |
| return err; |
| |
| if (pvr_num_devices == 0 || pvr_num_devices > MAX_DEVICES) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static const struct kernel_param_ops pvr_num_devices_ops = { |
| .set = pvr_num_devices_set, |
| .get = param_get_uint, |
| }; |
| |
| module_param_cb(num_devices, &pvr_num_devices_ops, &pvr_num_devices, 0444); |
| MODULE_PARM_DESC(num_devices, |
| "Number of platform devices to register (default: 1 - max: 16)"); |
| #endif /* defined(NO_HARDWARE) */ |
| #endif /* defined(MODULE) && !defined(PVR_LDM_PLATFORM_PRE_REGISTERED) */ |
| |
| static int pvr_devices_register(void) |
| { |
| #if defined(MODULE) && !defined(PVR_LDM_PLATFORM_PRE_REGISTERED) |
| struct platform_device_info pvr_dev_info = { |
| .name = SYS_RGX_DEV_NAME, |
| .id = -2, |
| #if defined(NO_HARDWARE) |
| /* Not all cores have 40 bit physical support, but this |
| * will work unless > 32 bit address is returned on those cores. |
| * In the future this will be fixed more correctly. |
| */ |
| .dma_mask = DMA_BIT_MASK(40), |
| #else |
| .dma_mask = DMA_BIT_MASK(32), |
| #endif |
| }; |
| unsigned int i; |
| |
| BUG_ON(pvr_num_devices == 0 || pvr_num_devices > MAX_DEVICES); |
| |
| pvr_devices = kmalloc_array(pvr_num_devices, sizeof(*pvr_devices), |
| GFP_KERNEL); |
| if (!pvr_devices) |
| return -ENOMEM; |
| |
| for (i = 0; i < pvr_num_devices; i++) { |
| pvr_devices[i] = platform_device_register_full(&pvr_dev_info); |
| if (IS_ERR(pvr_devices[i])) { |
| DRM_ERROR("unable to register device %u (err=%ld)\n", |
| i, PTR_ERR(pvr_devices[i])); |
| pvr_devices[i] = NULL; |
| return -ENODEV; |
| } |
| } |
| #endif /* defined(MODULE) && !defined(PVR_LDM_PLATFORM_PRE_REGISTERED) */ |
| |
| return 0; |
| } |
| |
| static void pvr_devices_unregister(void) |
| { |
| #if defined(MODULE) && !defined(PVR_LDM_PLATFORM_PRE_REGISTERED) |
| unsigned int i; |
| |
| BUG_ON(!pvr_devices); |
| |
| for (i = 0; i < pvr_num_devices && pvr_devices[i]; i++) |
| platform_device_unregister(pvr_devices[i]); |
| |
| kfree(pvr_devices); |
| pvr_devices = NULL; |
| #endif /* defined(MODULE) && !defined(PVR_LDM_PLATFORM_PRE_REGISTERED) */ |
| } |
| |
| static int pvr_probe(struct platform_device *pdev) |
| { |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0)) |
| struct drm_device *ddev; |
| int ret; |
| |
| DRM_DEBUG_DRIVER("device %p\n", &pdev->dev); |
| |
| ddev = drm_dev_alloc(&pvr_drm_platform_driver, &pdev->dev); |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0)) |
| if (IS_ERR(ddev)) |
| return PTR_ERR(ddev); |
| #else |
| if (!ddev) |
| return -ENOMEM; |
| #endif |
| |
| #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)) |
| /* Needed by drm_platform_set_busid */ |
| ddev->platformdev = pdev; |
| #endif |
| |
| /* |
| * The load callback, called from drm_dev_register, is deprecated, |
| * because of potential race conditions. Calling the function here, |
| * before calling drm_dev_register, avoids those potential races. |
| */ |
| BUG_ON(pvr_drm_platform_driver.load != NULL); |
| ret = pvr_drm_load(ddev, 0); |
| if (ret) |
| goto err_drm_dev_put; |
| |
| ret = drm_dev_register(ddev, 0); |
| if (ret) |
| goto err_drm_dev_unload; |
| |
| #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0)) |
| DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", |
| pvr_drm_platform_driver.name, |
| pvr_drm_platform_driver.major, |
| pvr_drm_platform_driver.minor, |
| pvr_drm_platform_driver.patchlevel, |
| pvr_drm_platform_driver.date, |
| ddev->primary->index); |
| #endif |
| return 0; |
| |
| err_drm_dev_unload: |
| pvr_drm_unload(ddev); |
| err_drm_dev_put: |
| drm_dev_put(ddev); |
| return ret; |
| #else |
| DRM_DEBUG_DRIVER("device %p\n", &pdev->dev); |
| |
| return drm_platform_init(&pvr_drm_platform_driver, pdev); |
| #endif |
| } |
| |
| static int pvr_remove(struct platform_device *pdev) |
| { |
| struct drm_device *ddev = platform_get_drvdata(pdev); |
| |
| DRM_DEBUG_DRIVER("device %p\n", &pdev->dev); |
| |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0)) |
| drm_dev_unregister(ddev); |
| |
| /* The unload callback, called from drm_dev_unregister, is |
| * deprecated. Call the unload function directly. |
| */ |
| BUG_ON(pvr_drm_platform_driver.unload != NULL); |
| pvr_drm_unload(ddev); |
| |
| drm_dev_put(ddev); |
| #else |
| drm_put_dev(ddev); |
| #endif |
| return 0; |
| } |
| |
| static void pvr_shutdown(struct platform_device *pdev) |
| { |
| struct drm_device *ddev = platform_get_drvdata(pdev); |
| struct pvr_drm_private *priv = ddev->dev_private; |
| |
| DRM_DEBUG_DRIVER("device %p\n", &pdev->dev); |
| |
| PVRSRVCommonDeviceShutdown(priv->dev_node); |
| } |
| |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)) |
| static struct of_device_id pvr_of_ids[] = { |
| #if defined(SYS_RGX_OF_COMPATIBLE) |
| { .compatible = SYS_RGX_OF_COMPATIBLE, }, |
| #endif |
| {}, |
| }; |
| |
| #if !defined(CHROMIUMOS_KERNEL) || !defined(MODULE) |
| MODULE_DEVICE_TABLE(of, pvr_of_ids); |
| #endif |
| #endif |
| |
| static struct platform_device_id pvr_platform_ids[] = { |
| #if defined(SYS_RGX_DEV_NAME) |
| { SYS_RGX_DEV_NAME, 0 }, |
| #endif |
| { } |
| }; |
| |
| #if !defined(CHROMIUMOS_KERNEL) || !defined(MODULE) |
| MODULE_DEVICE_TABLE(platform, pvr_platform_ids); |
| #endif |
| |
| static struct platform_driver pvr_platform_driver = { |
| .driver = { |
| .name = DRVNAME, |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)) |
| .of_match_table = of_match_ptr(pvr_of_ids), |
| #endif |
| .pm = &pvr_pm_ops, |
| }, |
| .id_table = pvr_platform_ids, |
| .probe = pvr_probe, |
| .remove = pvr_remove, |
| .shutdown = pvr_shutdown, |
| }; |
| |
| static int __init pvr_init(void) |
| { |
| int err; |
| |
| DRM_DEBUG_DRIVER("\n"); |
| |
| pvr_drm_platform_driver = pvr_drm_generic_driver; |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0)) && \ |
| (LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)) |
| pvr_drm_platform_driver.set_busid = drm_platform_set_busid; |
| #endif |
| |
| err = PVRSRVCommonDriverInit(); |
| if (err) |
| return err; |
| |
| err = platform_driver_register(&pvr_platform_driver); |
| if (err) |
| return err; |
| |
| return pvr_devices_register(); |
| } |
| |
| static void __exit pvr_exit(void) |
| { |
| DRM_DEBUG_DRIVER("\n"); |
| |
| pvr_devices_unregister(); |
| platform_driver_unregister(&pvr_platform_driver); |
| PVRSRVCommonDriverDeinit(); |
| |
| DRM_DEBUG_DRIVER("done\n"); |
| } |
| |
| late_initcall(pvr_init); |
| module_exit(pvr_exit); |