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 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 42 static const char *drm_platform_get_name(struct drm_device *dev) 43 { 44 return dev->driver->name; 45 } 46 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 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 */ 115 116 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