Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Derived from drm_pci.c |
| 3 | * |
| 4 | * Copyright 2003 José Fonseca. |
| 5 | * Copyright 2003 Leif Delgass. |
| 6 | * Copyright (c) 2009, Code Aurora Forum. |
| 7 | * All Rights Reserved. |
| 8 | * |
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 10 | * copy of this software and associated documentation files (the "Software"), |
| 11 | * to deal in the Software without restriction, including without limitation |
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
| 14 | * Software is furnished to do so, subject to the following conditions: |
| 15 | * |
| 16 | * The above copyright notice and this permission notice (including the next |
| 17 | * paragraph) shall be included in all copies or substantial portions of the |
| 18 | * Software. |
| 19 | * |
| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 23 | * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 24 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| 25 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 26 | */ |
| 27 | |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 28 | #include <linux/export.h> |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 29 | #include <drm/drmP.h> |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 30 | |
Lespiau, Damien | 66cc8b6 | 2013-08-20 00:53:10 +0100 | [diff] [blame] | 31 | /* |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 32 | * Register. |
| 33 | * |
| 34 | * \param platdev - Platform device struture |
| 35 | * \return zero on success or a negative number on failure. |
| 36 | * |
| 37 | * Attempt to gets inter module "drm" information. If we are first |
| 38 | * then register the character device and inter module information. |
| 39 | * Try and register, if we fail to register, backout previous work. |
| 40 | */ |
| 41 | |
Lespiau, Damien | 66cc8b6 | 2013-08-20 00:53:10 +0100 | [diff] [blame] | 42 | static int drm_get_platform_dev(struct platform_device *platdev, |
| 43 | struct drm_driver *driver) |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 44 | { |
| 45 | struct drm_device *dev; |
| 46 | int ret; |
| 47 | |
| 48 | DRM_DEBUG("\n"); |
| 49 | |
David Herrmann | 1bb7253 | 2013-10-02 11:23:34 +0200 | [diff] [blame] | 50 | dev = drm_dev_alloc(driver, &platdev->dev); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 51 | if (!dev) |
| 52 | return -ENOMEM; |
| 53 | |
| 54 | dev->platformdev = platdev; |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 55 | |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 56 | ret = drm_dev_register(dev, 0); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 57 | if (ret) |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 58 | goto err_free; |
Dave Airlie | b64c115 | 2010-09-14 20:14:38 +1000 | [diff] [blame] | 59 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 60 | DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", |
| 61 | driver->name, driver->major, driver->minor, driver->patchlevel, |
| 62 | driver->date, dev->primary->index); |
| 63 | |
| 64 | return 0; |
| 65 | |
David Herrmann | c22f0ac | 2013-10-02 11:23:35 +0200 | [diff] [blame] | 66 | err_free: |
David Herrmann | 099d1c2 | 2014-01-29 10:21:36 +0100 | [diff] [blame^] | 67 | drm_dev_unref(dev); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 68 | return ret; |
| 69 | } |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 70 | |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 71 | static int drm_platform_get_irq(struct drm_device *dev) |
| 72 | { |
| 73 | return platform_get_irq(dev->platformdev, 0); |
| 74 | } |
| 75 | |
| 76 | static const char *drm_platform_get_name(struct drm_device *dev) |
| 77 | { |
| 78 | return dev->platformdev->name; |
| 79 | } |
| 80 | |
| 81 | static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master) |
| 82 | { |
Rob Clark | b19c19a | 2012-03-06 10:20:36 -0600 | [diff] [blame] | 83 | int len, ret, id; |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 84 | |
Rob Clark | 28a4a16 | 2011-07-14 03:12:43 +0000 | [diff] [blame] | 85 | master->unique_len = 13 + strlen(dev->platformdev->name); |
| 86 | master->unique_size = master->unique_len; |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 87 | master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL); |
| 88 | |
| 89 | if (master->unique == NULL) |
| 90 | return -ENOMEM; |
| 91 | |
Rob Clark | b19c19a | 2012-03-06 10:20:36 -0600 | [diff] [blame] | 92 | id = dev->platformdev->id; |
| 93 | |
| 94 | /* if only a single instance of the platform device, id will be |
| 95 | * set to -1.. use 0 instead to avoid a funny looking bus-id: |
| 96 | */ |
| 97 | if (id == -1) |
| 98 | id = 0; |
| 99 | |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 100 | len = snprintf(master->unique, master->unique_len, |
Rob Clark | b19c19a | 2012-03-06 10:20:36 -0600 | [diff] [blame] | 101 | "platform:%s:%02d", dev->platformdev->name, id); |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 102 | |
| 103 | if (len > master->unique_len) { |
| 104 | DRM_ERROR("Unique buffer overflowed\n"); |
| 105 | ret = -EINVAL; |
| 106 | goto err; |
| 107 | } |
| 108 | |
| 109 | dev->devname = |
| 110 | kmalloc(strlen(dev->platformdev->name) + |
| 111 | master->unique_len + 2, GFP_KERNEL); |
| 112 | |
| 113 | if (dev->devname == NULL) { |
| 114 | ret = -ENOMEM; |
| 115 | goto err; |
| 116 | } |
| 117 | |
| 118 | sprintf(dev->devname, "%s@%s", dev->platformdev->name, |
| 119 | master->unique); |
| 120 | return 0; |
| 121 | err: |
| 122 | return ret; |
| 123 | } |
| 124 | |
| 125 | static struct drm_bus drm_platform_bus = { |
| 126 | .bus_type = DRIVER_BUS_PLATFORM, |
| 127 | .get_irq = drm_platform_get_irq, |
| 128 | .get_name = drm_platform_get_name, |
| 129 | .set_busid = drm_platform_set_busid, |
| 130 | }; |
| 131 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 132 | /** |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 133 | * Platform device initialization. Called direct from modules. |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 134 | * |
| 135 | * \return zero on success or a negative number on failure. |
| 136 | * |
| 137 | * Initializes a drm_device structures,registering the |
| 138 | * stubs |
| 139 | * |
| 140 | * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and |
| 141 | * after the initialization for driver customization. |
| 142 | */ |
| 143 | |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 144 | int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device) |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 145 | { |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 146 | DRM_DEBUG("\n"); |
| 147 | |
| 148 | driver->kdriver.platform_device = platform_device; |
| 149 | driver->bus = &drm_platform_bus; |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 150 | return drm_get_platform_dev(platform_device, driver); |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 151 | } |
Dave Airlie | 8410ea3 | 2010-12-15 03:16:38 +1000 | [diff] [blame] | 152 | EXPORT_SYMBOL(drm_platform_init); |