drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c

   1 /* Hisilicon Hibmc SoC drm driver
   2  *
   3  * Based on the bochs drm driver.
   4  *
   5  * Copyright (c) 2016 Huawei Limited.
   6  *
   7  * Author:
   8  *      Rongrong Zou <zourongrong@huawei.com>
   9  *      Rongrong Zou <zourongrong@gmail.com>
  10  *      Jianhua Li <lijianhua@huawei.com>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  */
  18
  19 #include <linux/console.h>
  20 #include <linux/module.h>
  21
  22 #include <drm/drm_atomic_helper.h>
  23 #include <drm/drm_crtc_helper.h>
  24
  25 #include "hibmc_drm_drv.h"
  26 #include "hibmc_drm_regs.h"
  27
  28 static const struct file_operations hibmc_fops = {
  29         .owner          = THIS_MODULE,
  30         .open           = drm_open,
  31         .release        = drm_release,
  32         .unlocked_ioctl = drm_ioctl,
  33         .compat_ioctl   = drm_compat_ioctl,
  34         .mmap           = hibmc_mmap,
  35         .poll           = drm_poll,
  36         .read           = drm_read,
  37         .llseek         = no_llseek,
  38 };
  39
  40 static int hibmc_enable_vblank(struct drm_device *dev, unsigned int pipe)
  41 {
  42         return 0;
  43 }
  44
  45 static void hibmc_disable_vblank(struct drm_device *dev, unsigned int pipe)
  46 {
  47 }
  48
  49 static struct drm_driver hibmc_driver = {
  50         .driver_features        = DRIVER_GEM | DRIVER_MODESET |
  51                                   DRIVER_ATOMIC,
  52         .fops                   = &hibmc_fops,
  53         .name                   = "hibmc",
  54         .date                   = "20160828",
  55         .desc                   = "hibmc drm driver",
  56         .major                  = 1,
  57         .minor                  = 0,
  58         .get_vblank_counter     = drm_vblank_no_hw_counter,
  59         .enable_vblank          = hibmc_enable_vblank,
  60         .disable_vblank         = hibmc_disable_vblank,
  61         .gem_free_object_unlocked = hibmc_gem_free_object,
  62         .dumb_create            = hibmc_dumb_create,
  63         .dumb_map_offset        = hibmc_dumb_mmap_offset,
  64         .dumb_destroy           = drm_gem_dumb_destroy,
  65 };
  66
  67 static int hibmc_pm_suspend(struct device *dev)
  68 {
  69         struct pci_dev *pdev = to_pci_dev(dev);
  70         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  71         struct hibmc_drm_private *priv = drm_dev->dev_private;
  72
  73         drm_kms_helper_poll_disable(drm_dev);
  74         priv->suspend_state = drm_atomic_helper_suspend(drm_dev);
  75         if (IS_ERR(priv->suspend_state)) {
  76                 DRM_ERROR("drm_atomic_helper_suspend failed: %ld\n",
  77                           PTR_ERR(priv->suspend_state));
  78                 drm_kms_helper_poll_enable(drm_dev);
  79                 return PTR_ERR(priv->suspend_state);
  80         }
  81
  82         return 0;
  83 }
  84
  85 static int hibmc_pm_resume(struct device *dev)
  86 {
  87         struct pci_dev *pdev = to_pci_dev(dev);
  88         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  89         struct hibmc_drm_private *priv = drm_dev->dev_private;
  90
  91         drm_atomic_helper_resume(drm_dev, priv->suspend_state);
  92         drm_kms_helper_poll_enable(drm_dev);
  93
  94         return 0;
  95 }
  96
  97 static const struct dev_pm_ops hibmc_pm_ops = {
  98         SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
  99                                 hibmc_pm_resume)
 100 };
 101
 102 static int hibmc_kms_init(struct hibmc_drm_private *priv)
 103 {
 104         int ret;
 105
 106         drm_mode_config_init(priv->dev);
 107         priv->mode_config_initialized = true;
 108
 109         priv->dev->mode_config.min_width = 0;
 110         priv->dev->mode_config.min_height = 0;
 111         priv->dev->mode_config.max_width = 1920;
 112         priv->dev->mode_config.max_height = 1440;
 113
 114         priv->dev->mode_config.fb_base = priv->fb_base;
 115         priv->dev->mode_config.preferred_depth = 24;
 116         priv->dev->mode_config.prefer_shadow = 0;
 117
 118         priv->dev->mode_config.funcs = (void *)&hibmc_mode_funcs;
 119
 120         ret = hibmc_de_init(priv);
 121         if (ret) {
 122                 DRM_ERROR("failed to init de: %d\n", ret);
 123                 return ret;
 124         }
 125
 126         return 0;
 127 }
 128
 129 static void hibmc_kms_fini(struct hibmc_drm_private *priv)
 130 {
 131         if (priv->mode_config_initialized) {
 132                 drm_mode_config_cleanup(priv->dev);
 133                 priv->mode_config_initialized = false;
 134         }
 135 }
 136
 137 /*
 138  * It can operate in one of three modes: 0, 1 or Sleep.
 139  */
 140 void hibmc_set_power_mode(struct hibmc_drm_private *priv,
 141                           unsigned int power_mode)
 142 {
 143         unsigned int control_value = 0;
 144         void __iomem   *mmio = priv->mmio;
 145         unsigned int input = 1;
 146
 147         if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
 148                 return;
 149
 150         if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
 151                 input = 0;
 152
 153         control_value = readl(mmio + HIBMC_POWER_MODE_CTRL);
 154         control_value &= ~(HIBMC_PW_MODE_CTL_MODE_MASK |
 155                            HIBMC_PW_MODE_CTL_OSC_INPUT_MASK);
 156         control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_MODE, power_mode);
 157         control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_OSC_INPUT, input);
 158         writel(control_value, mmio + HIBMC_POWER_MODE_CTRL);
 159 }
 160
 161 void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
 162 {
 163         unsigned int gate_reg;
 164         unsigned int mode;
 165         void __iomem   *mmio = priv->mmio;
 166
 167         /* Get current power mode. */
 168         mode = (readl(mmio + HIBMC_POWER_MODE_CTRL) &
 169                 HIBMC_PW_MODE_CTL_MODE_MASK) >> HIBMC_PW_MODE_CTL_MODE_SHIFT;
 170
 171         switch (mode) {
 172         case HIBMC_PW_MODE_CTL_MODE_MODE0:
 173                 gate_reg = HIBMC_MODE0_GATE;
 174                 break;
 175
 176         case HIBMC_PW_MODE_CTL_MODE_MODE1:
 177                 gate_reg = HIBMC_MODE1_GATE;
 178                 break;
 179
 180         default:
 181                 gate_reg = HIBMC_MODE0_GATE;
 182                 break;
 183         }
 184         writel(gate, mmio + gate_reg);
 185 }
 186
 187 static void hibmc_hw_config(struct hibmc_drm_private *priv)
 188 {
 189         unsigned int reg;
 190
 191         /* On hardware reset, power mode 0 is default. */
 192         hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
 193
 194         /* Enable display power gate & LOCALMEM power gate*/
 195         reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
 196         reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
 197         reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
 198         reg |= HIBMC_CURR_GATE_DISPLAY(1);
 199         reg |= HIBMC_CURR_GATE_LOCALMEM(1);
 200
 201         hibmc_set_current_gate(priv, reg);
 202
 203         /*
 204          * Reset the memory controller. If the memory controller
 205          * is not reset in chip,the system might hang when sw accesses
 206          * the memory.The memory should be resetted after
 207          * changing the MXCLK.
 208          */
 209         reg = readl(priv->mmio + HIBMC_MISC_CTRL);
 210         reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
 211         reg |= HIBMC_MSCCTL_LOCALMEM_RESET(0);
 212         writel(reg, priv->mmio + HIBMC_MISC_CTRL);
 213
 214         reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
 215         reg |= HIBMC_MSCCTL_LOCALMEM_RESET(1);
 216
 217         writel(reg, priv->mmio + HIBMC_MISC_CTRL);
 218 }
 219
 220 static int hibmc_hw_map(struct hibmc_drm_private *priv)
 221 {
 222         struct drm_device *dev = priv->dev;
 223         struct pci_dev *pdev = dev->pdev;
 224         resource_size_t addr, size, ioaddr, iosize;
 225
 226         ioaddr = pci_resource_start(pdev, 1);
 227         iosize = pci_resource_len(pdev, 1);
 228         priv->mmio = devm_ioremap_nocache(dev->dev, ioaddr, iosize);
 229         if (!priv->mmio) {
 230                 DRM_ERROR("Cannot map mmio region\n");
 231                 return -ENOMEM;
 232         }
 233
 234         addr = pci_resource_start(pdev, 0);
 235         size = pci_resource_len(pdev, 0);
 236         priv->fb_map = devm_ioremap(dev->dev, addr, size);
 237         if (!priv->fb_map) {
 238                 DRM_ERROR("Cannot map framebuffer\n");
 239                 return -ENOMEM;
 240         }
 241         priv->fb_base = addr;
 242         priv->fb_size = size;
 243
 244         return 0;
 245 }
 246
 247 static int hibmc_hw_init(struct hibmc_drm_private *priv)
 248 {
 249         int ret;
 250
 251         ret = hibmc_hw_map(priv);
 252         if (ret)
 253                 return ret;
 254
 255         hibmc_hw_config(priv);
 256
 257         return 0;
 258 }
 259
 260 static int hibmc_unload(struct drm_device *dev)
 261 {
 262         struct hibmc_drm_private *priv = dev->dev_private;
 263
 264         hibmc_fbdev_fini(priv);
 265         hibmc_kms_fini(priv);
 266         hibmc_mm_fini(priv);
 267         dev->dev_private = NULL;
 268         return 0;
 269 }
 270
 271 static int hibmc_load(struct drm_device *dev)
 272 {
 273         struct hibmc_drm_private *priv;
 274         int ret;
 275
 276         priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
 277         if (!priv) {
 278                 DRM_ERROR("no memory to allocate for hibmc_drm_private\n");
 279                 return -ENOMEM;
 280         }
 281         dev->dev_private = priv;
 282         priv->dev = dev;
 283
 284         ret = hibmc_hw_init(priv);
 285         if (ret)
 286                 goto err;
 287
 288         ret = hibmc_mm_init(priv);
 289         if (ret)
 290                 goto err;
 291
 292         ret = hibmc_kms_init(priv);
 293         if (ret)
 294                 goto err;
 295
 296         /* reset all the states of crtc/plane/encoder/connector */
 297         drm_mode_config_reset(dev);
 298
 299         ret = hibmc_fbdev_init(priv);
 300         if (ret) {
 301                 DRM_ERROR("failed to initialize fbdev: %d\n", ret);
 302                 goto err;
 303         }
 304
 305         return 0;
 306
 307 err:
 308         hibmc_unload(dev);
 309         DRM_ERROR("failed to initialize drm driver: %d\n", ret);
 310         return ret;
 311 }
 312
 313 static int hibmc_pci_probe(struct pci_dev *pdev,
 314                            const struct pci_device_id *ent)
 315 {
 316         struct drm_device *dev;
 317         int ret;
 318
 319         dev = drm_dev_alloc(&hibmc_driver, &pdev->dev);
 320         if (!dev) {
 321                 DRM_ERROR("failed to allocate drm_device\n");
 322                 return -ENOMEM;
 323         }
 324
 325         dev->pdev = pdev;
 326         pci_set_drvdata(pdev, dev);
 327
 328         ret = pci_enable_device(pdev);
 329         if (ret) {
 330                 DRM_ERROR("failed to enable pci device: %d\n", ret);
 331                 goto err_free;
 332         }
 333
 334         ret = hibmc_load(dev);
 335         if (ret) {
 336                 DRM_ERROR("failed to load hibmc: %d\n", ret);
 337                 goto err_disable;
 338         }
 339
 340         ret = drm_dev_register(dev, 0);
 341         if (ret) {
 342                 DRM_ERROR("failed to register drv for userspace access: %d\n",
 343                           ret);
 344                 goto err_unload;
 345         }
 346         return 0;
 347
 348 err_unload:
 349         hibmc_unload(dev);
 350 err_disable:
 351         pci_disable_device(pdev);
 352 err_free:
 353         drm_dev_unref(dev);
 354
 355         return ret;
 356 }
 357
 358 static void hibmc_pci_remove(struct pci_dev *pdev)
 359 {
 360         struct drm_device *dev = pci_get_drvdata(pdev);
 361
 362         drm_dev_unregister(dev);
 363         hibmc_unload(dev);
 364         drm_dev_unref(dev);
 365 }
 366
 367 static struct pci_device_id hibmc_pci_table[] = {
 368         {0x19e5, 0x1711, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 369         {0,}
 370 };
 371
 372 static struct pci_driver hibmc_pci_driver = {
 373         .name =         "hibmc-drm",
 374         .id_table =     hibmc_pci_table,
 375         .probe =        hibmc_pci_probe,
 376         .remove =       hibmc_pci_remove,
 377         .driver.pm =    &hibmc_pm_ops,
 378 };
 379
 380 static int __init hibmc_init(void)
 381 {
 382         return pci_register_driver(&hibmc_pci_driver);
 383 }
 384
 385 static void __exit hibmc_exit(void)
 386 {
 387         return pci_unregister_driver(&hibmc_pci_driver);
 388 }
 389
 390 module_init(hibmc_init);
 391 module_exit(hibmc_exit);
 392
 393 MODULE_DEVICE_TABLE(pci, hibmc_pci_table);
 394 MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>");
 395 MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc");
 396 MODULE_LICENSE("GPL v2");