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 #include <sys/cdefs.h>
28 #include <dev/drm2/drmP.h>
29
drm_platform_free_irq(struct drm_device * dev)30 static void drm_platform_free_irq(struct drm_device *dev)
31 {
32 if (dev->irqr == NULL)
33 return;
34
35 bus_release_resource(dev->dev, SYS_RES_IRQ,
36 dev->irqrid, dev->irqr);
37
38 dev->irqr = NULL;
39 dev->irq = 0;
40 }
41
drm_platform_get_name(struct drm_device * dev)42 static const char *drm_platform_get_name(struct drm_device *dev)
43 {
44 return dev->driver->name;
45 }
46
drm_platform_set_busid(struct drm_device * dev,struct drm_master * master)47 static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
48 {
49 int len, ret, id;
50
51 master->unique_len = 13 + strlen(dev->driver->name);
52 master->unique_size = master->unique_len;
53 master->unique = malloc(master->unique_len + 1, DRM_MEM_DRIVER, M_NOWAIT);
54
55 if (master->unique == NULL)
56 return -ENOMEM;
57
58 id = 0; // XXX dev->driver->id;
59
60 /* if only a single instance of the platform device, id will be
61 * set to -1.. use 0 instead to avoid a funny looking bus-id:
62 */
63 if (id == -1)
64 id = 0;
65
66 len = snprintf(master->unique, master->unique_len,
67 "platform:%s:%02d", dev->driver->name, id);
68
69 if (len > master->unique_len) {
70 DRM_ERROR("Unique buffer overflowed\n");
71 ret = -EINVAL;
72 goto err;
73 }
74
75 return 0;
76 err:
77 return ret;
78 }
79
drm_platform_get_irq(struct drm_device * dev)80 static int drm_platform_get_irq(struct drm_device *dev)
81 {
82 if (dev->irqr)
83 return (dev->irq);
84
85 dev->irqr = bus_alloc_resource_any(dev->dev, SYS_RES_IRQ,
86 &dev->irqrid, RF_SHAREABLE);
87 if (!dev->irqr) {
88 dev_err(dev->dev, "Failed to allocate IRQ\n");
89 return (0);
90 }
91
92 dev->irq = (int) rman_get_start(dev->irqr);
93
94 return (dev->irq);
95 }
96
97 static struct drm_bus drm_platform_bus = {
98 .bus_type = DRIVER_BUS_PLATFORM,
99 .get_irq = drm_platform_get_irq,
100 .free_irq = drm_platform_free_irq,
101 .get_name = drm_platform_get_name,
102 .set_busid = drm_platform_set_busid,
103 };
104
105 /**
106 * Register.
107 *
108 * \param platdev - Platform device structure
109 * \return zero on success or a negative number on failure.
110 *
111 * Attempt to gets inter module "drm" information. If we are first
112 * then register the character device and inter module information.
113 * Try and register, if we fail to register, backout previous work.
114 */
115
drm_get_platform_dev(device_t kdev,struct drm_device * dev,struct drm_driver * driver)116 int drm_get_platform_dev(device_t kdev, struct drm_device *dev,
117 struct drm_driver *driver)
118 {
119 int ret;
120
121 DRM_DEBUG("\n");
122
123 driver->bus = &drm_platform_bus;
124
125 dev->dev = kdev;
126
127 sx_xlock(&drm_global_mutex);
128
129 ret = drm_fill_in_dev(dev, driver);
130
131 if (ret) {
132 printf("DRM: Fill_in_dev failed.\n");
133 goto err_g1;
134 }
135
136 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
137 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
138 if (ret)
139 goto err_g1;
140 }
141
142 ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
143 if (ret)
144 goto err_g2;
145
146 if (dev->driver->load) {
147 ret = dev->driver->load(dev, 0);
148 if (ret)
149 goto err_g3;
150 }
151
152 /* setup the grouping for the legacy output */
153 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
154 ret = drm_mode_group_init_legacy_group(dev,
155 &dev->primary->mode_group);
156 if (ret)
157 goto err_g3;
158 }
159
160 #ifdef FREEBSD_NOTYET
161 list_add_tail(&dev->driver_item, &driver->device_list);
162 #endif /* FREEBSD_NOTYET */
163
164 sx_xunlock(&drm_global_mutex);
165
166 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
167 driver->name, driver->major, driver->minor, driver->patchlevel,
168 driver->date, dev->primary->index);
169
170 return 0;
171
172 err_g3:
173 drm_put_minor(&dev->primary);
174 err_g2:
175 if (drm_core_check_feature(dev, DRIVER_MODESET))
176 drm_put_minor(&dev->control);
177 err_g1:
178 sx_xunlock(&drm_global_mutex);
179 return ret;
180 }
181 EXPORT_SYMBOL(drm_get_platform_dev);
182