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 __FBSDID("$FreeBSD$"); 29 30 #include <dev/drm2/drmP.h> 31 32 static void drm_platform_free_irq(struct drm_device *dev) 33 { 34 if (dev->irqr == NULL) 35 return; 36 37 bus_release_resource(dev->dev, SYS_RES_IRQ, 38 dev->irqrid, dev->irqr); 39 40 dev->irqr = NULL; 41 dev->irq = 0; 42 } 43 44 static const char *drm_platform_get_name(struct drm_device *dev) 45 { 46 return dev->driver->name; 47 } 48 49 static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master) 50 { 51 int len, ret, id; 52 53 master->unique_len = 13 + strlen(dev->driver->name); 54 master->unique_size = master->unique_len; 55 master->unique = malloc(master->unique_len + 1, DRM_MEM_DRIVER, M_NOWAIT); 56 57 if (master->unique == NULL) 58 return -ENOMEM; 59 60 id = 0; // XXX dev->driver->id; 61 62 /* if only a single instance of the platform device, id will be 63 * set to -1.. use 0 instead to avoid a funny looking bus-id: 64 */ 65 if (id == -1) 66 id = 0; 67 68 len = snprintf(master->unique, master->unique_len, 69 "platform:%s:%02d", dev->driver->name, id); 70 71 if (len > master->unique_len) { 72 DRM_ERROR("Unique buffer overflowed\n"); 73 ret = -EINVAL; 74 goto err; 75 } 76 77 return 0; 78 err: 79 return ret; 80 } 81 82 static int drm_platform_get_irq(struct drm_device *dev) 83 { 84 if (dev->irqr) 85 return (dev->irq); 86 87 dev->irqr = bus_alloc_resource_any(dev->dev, SYS_RES_IRQ, 88 &dev->irqrid, RF_SHAREABLE); 89 if (!dev->irqr) { 90 dev_err(dev->dev, "Failed to allocate IRQ\n"); 91 return (0); 92 } 93 94 dev->irq = (int) rman_get_start(dev->irqr); 95 96 return (dev->irq); 97 } 98 99 static struct drm_bus drm_platform_bus = { 100 .bus_type = DRIVER_BUS_PLATFORM, 101 .get_irq = drm_platform_get_irq, 102 .free_irq = drm_platform_free_irq, 103 .get_name = drm_platform_get_name, 104 .set_busid = drm_platform_set_busid, 105 }; 106 107 /** 108 * Register. 109 * 110 * \param platdev - Platform device structure 111 * \return zero on success or a negative number on failure. 112 * 113 * Attempt to gets inter module "drm" information. If we are first 114 * then register the character device and inter module information. 115 * Try and register, if we fail to register, backout previous work. 116 */ 117 118 int drm_get_platform_dev(device_t kdev, struct drm_device *dev, 119 struct drm_driver *driver) 120 { 121 int ret; 122 123 DRM_DEBUG("\n"); 124 125 driver->bus = &drm_platform_bus; 126 127 dev->dev = kdev; 128 129 sx_xlock(&drm_global_mutex); 130 131 ret = drm_fill_in_dev(dev, driver); 132 133 if (ret) { 134 printf("DRM: Fill_in_dev failed.\n"); 135 goto err_g1; 136 } 137 138 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 139 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); 140 if (ret) 141 goto err_g1; 142 } 143 144 ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY); 145 if (ret) 146 goto err_g2; 147 148 if (dev->driver->load) { 149 ret = dev->driver->load(dev, 0); 150 if (ret) 151 goto err_g3; 152 } 153 154 /* setup the grouping for the legacy output */ 155 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 156 ret = drm_mode_group_init_legacy_group(dev, 157 &dev->primary->mode_group); 158 if (ret) 159 goto err_g3; 160 } 161 162 #ifdef FREEBSD_NOTYET 163 list_add_tail(&dev->driver_item, &driver->device_list); 164 #endif /* FREEBSD_NOTYET */ 165 166 sx_xunlock(&drm_global_mutex); 167 168 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", 169 driver->name, driver->major, driver->minor, driver->patchlevel, 170 driver->date, dev->primary->index); 171 172 return 0; 173 174 err_g3: 175 drm_put_minor(&dev->primary); 176 err_g2: 177 if (drm_core_check_feature(dev, DRIVER_MODESET)) 178 drm_put_minor(&dev->control); 179 err_g1: 180 sx_xunlock(&drm_global_mutex); 181 return ret; 182 } 183 EXPORT_SYMBOL(drm_get_platform_dev); 184