LXR linux/drivers/gpu/drm/ast/ast

   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
  29#include <linux/console.h>
  30#include <linux/module.h>
  31#include <linux/pci.h>
  32
  33#include <drm/drm_crtc_helper.h>
  34#include <drm/drm_drv.h>
  35#include <drm/drm_gem_vram_helper.h>
  36#include <drm/drm_pci.h>
  37#include <drm/drm_probe_helper.h>
  38
  39#include "ast_drv.h"
  40
  41int ast_modeset = -1;
  42
  43MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  44module_param_named(modeset, ast_modeset, int, 0400);
  45
  46#define PCI_VENDOR_ASPEED 0x1a03
  47
  48static struct drm_driver driver;
  49
  50#define AST_VGA_DEVICE(id, info) {              \
  51        .class = PCI_BASE_CLASS_DISPLAY << 16,  \
  52        .class_mask = 0xff0000,                 \
  53        .vendor = PCI_VENDOR_ASPEED,                    \
  54        .device = id,                           \
  55        .subvendor = PCI_ANY_ID,                \
  56        .subdevice = PCI_ANY_ID,                \
  57        .driver_data = (unsigned long) info }
  58
  59static const struct pci_device_id pciidlist[] = {
  60        AST_VGA_DEVICE(PCI_CHIP_AST2000, NULL),
  61        AST_VGA_DEVICE(PCI_CHIP_AST2100, NULL),
  62        /*      AST_VGA_DEVICE(PCI_CHIP_AST1180, NULL), - don't bind to 1180 for now */
  63        {0, 0, 0},
  64};
  65
  66MODULE_DEVICE_TABLE(pci, pciidlist);
  67
  68static void ast_kick_out_firmware_fb(struct pci_dev *pdev)
  69{
  70        struct apertures_struct *ap;
  71        bool primary = false;
  72
  73        ap = alloc_apertures(1);
  74        if (!ap)
  75                return;
  76
  77        ap->ranges[0].base = pci_resource_start(pdev, 0);
  78        ap->ranges[0].size = pci_resource_len(pdev, 0);
  79
  80#ifdef CONFIG_X86
  81        primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  82#endif
  83        drm_fb_helper_remove_conflicting_framebuffers(ap, "astdrmfb", primary);
  84        kfree(ap);
  85}
  86
  87static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  88{
  89        ast_kick_out_firmware_fb(pdev);
  90
  91        return drm_get_pci_dev(pdev, ent, &driver);
  92}
  93
  94static void
  95ast_pci_remove(struct pci_dev *pdev)
  96{
  97        struct drm_device *dev = pci_get_drvdata(pdev);
  98
  99        drm_put_dev(dev);
 100}
 101
 102
 103
 104static int ast_drm_freeze(struct drm_device *dev)
 105{
 106        drm_kms_helper_poll_disable(dev);
 107        pci_save_state(dev->pdev);
 108        drm_fb_helper_set_suspend_unlocked(dev->fb_helper, true);
 109
 110        return 0;
 111}
 112
 113static int ast_drm_thaw(struct drm_device *dev)
 114{
 115        ast_post_gpu(dev);
 116
 117        drm_mode_config_reset(dev);
 118        drm_helper_resume_force_mode(dev);
 119        drm_fb_helper_set_suspend_unlocked(dev->fb_helper, false);
 120
 121        return 0;
 122}
 123
 124static int ast_drm_resume(struct drm_device *dev)
 125{
 126        int ret;
 127
 128        if (pci_enable_device(dev->pdev))
 129                return -EIO;
 130
 131        ret = ast_drm_thaw(dev);
 132        if (ret)
 133                return ret;
 134
 135        drm_kms_helper_poll_enable(dev);
 136        return 0;
 137}
 138
 139static int ast_pm_suspend(struct device *dev)
 140{
 141        struct pci_dev *pdev = to_pci_dev(dev);
 142        struct drm_device *ddev = pci_get_drvdata(pdev);
 143        int error;
 144
 145        error = ast_drm_freeze(ddev);
 146        if (error)
 147                return error;
 148
 149        pci_disable_device(pdev);
 150        pci_set_power_state(pdev, PCI_D3hot);
 151        return 0;
 152}
 153static int ast_pm_resume(struct device *dev)
 154{
 155        struct pci_dev *pdev = to_pci_dev(dev);
 156        struct drm_device *ddev = pci_get_drvdata(pdev);
 157        return ast_drm_resume(ddev);
 158}
 159
 160static int ast_pm_freeze(struct device *dev)
 161{
 162        struct pci_dev *pdev = to_pci_dev(dev);
 163        struct drm_device *ddev = pci_get_drvdata(pdev);
 164
 165        if (!ddev || !ddev->dev_private)
 166                return -ENODEV;
 167        return ast_drm_freeze(ddev);
 168
 169}
 170
 171static int ast_pm_thaw(struct device *dev)
 172{
 173        struct pci_dev *pdev = to_pci_dev(dev);
 174        struct drm_device *ddev = pci_get_drvdata(pdev);
 175        return ast_drm_thaw(ddev);
 176}
 177
 178static int ast_pm_poweroff(struct device *dev)
 179{
 180        struct pci_dev *pdev = to_pci_dev(dev);
 181        struct drm_device *ddev = pci_get_drvdata(pdev);
 182
 183        return ast_drm_freeze(ddev);
 184}
 185
 186static const struct dev_pm_ops ast_pm_ops = {
 187        .suspend = ast_pm_suspend,
 188        .resume = ast_pm_resume,
 189        .freeze = ast_pm_freeze,
 190        .thaw = ast_pm_thaw,
 191        .poweroff = ast_pm_poweroff,
 192        .restore = ast_pm_resume,
 193};
 194
 195static struct pci_driver ast_pci_driver = {
 196        .name = DRIVER_NAME,
 197        .id_table = pciidlist,
 198        .probe = ast_pci_probe,
 199        .remove = ast_pci_remove,
 200        .driver.pm = &ast_pm_ops,
 201};
 202
 203DEFINE_DRM_GEM_FOPS(ast_fops);
 204
 205static struct drm_driver driver = {
 206        .driver_features = DRIVER_MODESET | DRIVER_GEM,
 207
 208        .load = ast_driver_load,
 209        .unload = ast_driver_unload,
 210
 211        .fops = &ast_fops,
 212        .name = DRIVER_NAME,
 213        .desc = DRIVER_DESC,
 214        .date = DRIVER_DATE,
 215        .major = DRIVER_MAJOR,
 216        .minor = DRIVER_MINOR,
 217        .patchlevel = DRIVER_PATCHLEVEL,
 218
 219        DRM_GEM_VRAM_DRIVER
 220};
 221
 222static int __init ast_init(void)
 223{
 224        if (vgacon_text_force() && ast_modeset == -1)
 225                return -EINVAL;
 226
 227        if (ast_modeset == 0)
 228                return -EINVAL;
 229        return pci_register_driver(&ast_pci_driver);
 230}
 231static void __exit ast_exit(void)
 232{
 233        pci_unregister_driver(&ast_pci_driver);
 234}
 235
 236module_init(ast_init);
 237module_exit(ast_exit);
 238
 239MODULE_AUTHOR(DRIVER_AUTHOR);
 240MODULE_DESCRIPTION(DRIVER_DESC);
 241MODULE_LICENSE("GPL and additional rights");
 242
 243