drivers/gpu/drm/ast/ast_drv.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  */
  25 /*
  26  * Authors: Dave Airlie <airlied@redhat.com>
  27  */
  28 #include <linux/module.h>
  29 #include <linux/console.h>
  30
  31 #include <drm/drmP.h>
  32 #include <drm/drm_crtc_helper.h>
  33
  34 #include "ast_drv.h"
  35
  36 int ast_modeset = -1;
  37
  38 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  39 module_param_named(modeset, ast_modeset, int, 0400);
  40
  41 #define PCI_VENDOR_ASPEED 0x1a03
  42
  43 static struct drm_driver driver;
  44
  45 #define AST_VGA_DEVICE(id, info) {              \
  46         .class = PCI_BASE_CLASS_DISPLAY << 16,  \
  47         .class_mask = 0xff0000,                 \
  48         .vendor = PCI_VENDOR_ASPEED,                    \
  49         .device = id,                           \
  50         .subvendor = PCI_ANY_ID,                \
  51         .subdevice = PCI_ANY_ID,                \
  52         .driver_data = (unsigned long) info }
  53
  54 static const struct pci_device_id pciidlist[] = {
  55         AST_VGA_DEVICE(PCI_CHIP_AST2000, NULL),
  56         AST_VGA_DEVICE(PCI_CHIP_AST2100, NULL),
  57         /*      AST_VGA_DEVICE(PCI_CHIP_AST1180, NULL), - don't bind to 1180 for now */
  58         {0, 0, 0},
  59 };
  60
  61 MODULE_DEVICE_TABLE(pci, pciidlist);
  62
  63 static void ast_kick_out_firmware_fb(struct pci_dev *pdev)
  64 {
  65         struct apertures_struct *ap;
  66         bool primary = false;
  67
  68         ap = alloc_apertures(1);
  69         if (!ap)
  70                 return;
  71
  72         ap->ranges[0].base = pci_resource_start(pdev, 0);
  73         ap->ranges[0].size = pci_resource_len(pdev, 0);
  74
  75 #ifdef CONFIG_X86
  76         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  77 #endif
  78         drm_fb_helper_remove_conflicting_framebuffers(ap, "astdrmfb", primary);
  79         kfree(ap);
  80 }
  81
  82 static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  83 {
  84         ast_kick_out_firmware_fb(pdev);
  85
  86         return drm_get_pci_dev(pdev, ent, &driver);
  87 }
  88
  89 static void
  90 ast_pci_remove(struct pci_dev *pdev)
  91 {
  92         struct drm_device *dev = pci_get_drvdata(pdev);
  93
  94         drm_put_dev(dev);
  95 }
  96
  97
  98
  99 static int ast_drm_freeze(struct drm_device *dev)
 100 {
 101         drm_kms_helper_poll_disable(dev);
 102
 103         pci_save_state(dev->pdev);
 104
 105         console_lock();
 106         ast_fbdev_set_suspend(dev, 1);
 107         console_unlock();
 108         return 0;
 109 }
 110
 111 static int ast_drm_thaw(struct drm_device *dev)
 112 {
 113         int error = 0;
 114
 115         ast_post_gpu(dev);
 116
 117         drm_mode_config_reset(dev);
 118         drm_helper_resume_force_mode(dev);
 119
 120         console_lock();
 121         ast_fbdev_set_suspend(dev, 0);
 122         console_unlock();
 123         return error;
 124 }
 125
 126 static int ast_drm_resume(struct drm_device *dev)
 127 {
 128         int ret;
 129
 130         if (pci_enable_device(dev->pdev))
 131                 return -EIO;
 132
 133         ret = ast_drm_thaw(dev);
 134         if (ret)
 135                 return ret;
 136
 137         drm_kms_helper_poll_enable(dev);
 138         return 0;
 139 }
 140
 141 static int ast_pm_suspend(struct device *dev)
 142 {
 143         struct pci_dev *pdev = to_pci_dev(dev);
 144         struct drm_device *ddev = pci_get_drvdata(pdev);
 145         int error;
 146
 147         error = ast_drm_freeze(ddev);
 148         if (error)
 149                 return error;
 150
 151         pci_disable_device(pdev);
 152         pci_set_power_state(pdev, PCI_D3hot);
 153         return 0;
 154 }
 155 static int ast_pm_resume(struct device *dev)
 156 {
 157         struct pci_dev *pdev = to_pci_dev(dev);
 158         struct drm_device *ddev = pci_get_drvdata(pdev);
 159         return ast_drm_resume(ddev);
 160 }
 161
 162 static int ast_pm_freeze(struct device *dev)
 163 {
 164         struct pci_dev *pdev = to_pci_dev(dev);
 165         struct drm_device *ddev = pci_get_drvdata(pdev);
 166
 167         if (!ddev || !ddev->dev_private)
 168                 return -ENODEV;
 169         return ast_drm_freeze(ddev);
 170
 171 }
 172
 173 static int ast_pm_thaw(struct device *dev)
 174 {
 175         struct pci_dev *pdev = to_pci_dev(dev);
 176         struct drm_device *ddev = pci_get_drvdata(pdev);
 177         return ast_drm_thaw(ddev);
 178 }
 179
 180 static int ast_pm_poweroff(struct device *dev)
 181 {
 182         struct pci_dev *pdev = to_pci_dev(dev);
 183         struct drm_device *ddev = pci_get_drvdata(pdev);
 184
 185         return ast_drm_freeze(ddev);
 186 }
 187
 188 static const struct dev_pm_ops ast_pm_ops = {
 189         .suspend = ast_pm_suspend,
 190         .resume = ast_pm_resume,
 191         .freeze = ast_pm_freeze,
 192         .thaw = ast_pm_thaw,
 193         .poweroff = ast_pm_poweroff,
 194         .restore = ast_pm_resume,
 195 };
 196
 197 static struct pci_driver ast_pci_driver = {
 198         .name = DRIVER_NAME,
 199         .id_table = pciidlist,
 200         .probe = ast_pci_probe,
 201         .remove = ast_pci_remove,
 202         .driver.pm = &ast_pm_ops,
 203 };
 204
 205 static const struct file_operations ast_fops = {
 206         .owner = THIS_MODULE,
 207         .open = drm_open,
 208         .release = drm_release,
 209         .unlocked_ioctl = drm_ioctl,
 210         .mmap = ast_mmap,
 211         .poll = drm_poll,
 212         .compat_ioctl = drm_compat_ioctl,
 213         .read = drm_read,
 214 };
 215
 216 static struct drm_driver driver = {
 217         .driver_features = DRIVER_MODESET | DRIVER_GEM,
 218
 219         .load = ast_driver_load,
 220         .unload = ast_driver_unload,
 221
 222         .fops = &ast_fops,
 223         .name = DRIVER_NAME,
 224         .desc = DRIVER_DESC,
 225         .date = DRIVER_DATE,
 226         .major = DRIVER_MAJOR,
 227         .minor = DRIVER_MINOR,
 228         .patchlevel = DRIVER_PATCHLEVEL,
 229
 230         .gem_free_object_unlocked = ast_gem_free_object,
 231         .dumb_create = ast_dumb_create,
 232         .dumb_map_offset = ast_dumb_mmap_offset,
 233
 234 };
 235
 236 static int __init ast_init(void)
 237 {
 238         if (vgacon_text_force() && ast_modeset == -1)
 239                 return -EINVAL;
 240
 241         if (ast_modeset == 0)
 242                 return -EINVAL;
 243         return pci_register_driver(&ast_pci_driver);
 244 }
 245 static void __exit ast_exit(void)
 246 {
 247         pci_unregister_driver(&ast_pci_driver);
 248 }
 249
 250 module_init(ast_init);
 251 module_exit(ast_exit);
 252
 253 MODULE_AUTHOR(DRIVER_AUTHOR);
 254 MODULE_DESCRIPTION(DRIVER_DESC);
 255 MODULE_LICENSE("GPL and additional rights");
 256