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 irqreturn_t hibmc_drm_interrupt(int irq, void *arg)
  41 {
  42         struct drm_device *dev = (struct drm_device *)arg;
  43         struct hibmc_drm_private *priv =
  44                 (struct hibmc_drm_private *)dev->dev_private;
  45         u32 status;
  46
  47         status = readl(priv->mmio + HIBMC_RAW_INTERRUPT);
  48
  49         if (status & HIBMC_RAW_INTERRUPT_VBLANK(1)) {
  50                 writel(HIBMC_RAW_INTERRUPT_VBLANK(1),
  51                        priv->mmio + HIBMC_RAW_INTERRUPT);
  52                 drm_handle_vblank(dev, 0);
  53         }
  54
  55         return IRQ_HANDLED;
  56 }
  57
  58 static struct drm_driver hibmc_driver = {
  59         .driver_features        = DRIVER_GEM | DRIVER_MODESET |
  60                                   DRIVER_ATOMIC | DRIVER_HAVE_IRQ,
  61         .fops                   = &hibmc_fops,
  62         .name                   = "hibmc",
  63         .date                   = "20160828",
  64         .desc                   = "hibmc drm driver",
  65         .major                  = 1,
  66         .minor                  = 0,
  67         .gem_free_object_unlocked = hibmc_gem_free_object,
  68         .dumb_create            = hibmc_dumb_create,
  69         .dumb_map_offset        = hibmc_dumb_mmap_offset,
  70         .irq_handler            = hibmc_drm_interrupt,
  71 };
  72
  73 static int __maybe_unused hibmc_pm_suspend(struct device *dev)
  74 {
  75         struct pci_dev *pdev = to_pci_dev(dev);
  76         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  77         struct hibmc_drm_private *priv = drm_dev->dev_private;
  78
  79         drm_kms_helper_poll_disable(drm_dev);
  80         priv->suspend_state = drm_atomic_helper_suspend(drm_dev);
  81         if (IS_ERR(priv->suspend_state)) {
  82                 DRM_ERROR("drm_atomic_helper_suspend failed: %ld\n",
  83                           PTR_ERR(priv->suspend_state));
  84                 drm_kms_helper_poll_enable(drm_dev);
  85                 return PTR_ERR(priv->suspend_state);
  86         }
  87
  88         return 0;
  89 }
  90
  91 static int  __maybe_unused hibmc_pm_resume(struct device *dev)
  92 {
  93         struct pci_dev *pdev = to_pci_dev(dev);
  94         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  95         struct hibmc_drm_private *priv = drm_dev->dev_private;
  96
  97         drm_atomic_helper_resume(drm_dev, priv->suspend_state);
  98         drm_kms_helper_poll_enable(drm_dev);
  99
 100         return 0;
 101 }
 102
 103 static const struct dev_pm_ops hibmc_pm_ops = {
 104         SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
 105                                 hibmc_pm_resume)
 106 };
 107
 108 static int hibmc_kms_init(struct hibmc_drm_private *priv)
 109 {
 110         int ret;
 111
 112         drm_mode_config_init(priv->dev);
 113         priv->mode_config_initialized = true;
 114
 115         priv->dev->mode_config.min_width = 0;
 116         priv->dev->mode_config.min_height = 0;
 117         priv->dev->mode_config.max_width = 1920;
 118         priv->dev->mode_config.max_height = 1440;
 119
 120         priv->dev->mode_config.fb_base = priv->fb_base;
 121         priv->dev->mode_config.preferred_depth = 24;
 122         priv->dev->mode_config.prefer_shadow = 0;
 123
 124         priv->dev->mode_config.funcs = (void *)&hibmc_mode_funcs;
 125
 126         ret = hibmc_de_init(priv);
 127         if (ret) {
 128                 DRM_ERROR("failed to init de: %d\n", ret);
 129                 return ret;
 130         }
 131
 132         ret = hibmc_vdac_init(priv);
 133         if (ret) {
 134                 DRM_ERROR("failed to init vdac: %d\n", ret);
 135                 return ret;
 136         }
 137
 138         return 0;
 139 }
 140
 141 static void hibmc_kms_fini(struct hibmc_drm_private *priv)
 142 {
 143         if (priv->mode_config_initialized) {
 144                 drm_mode_config_cleanup(priv->dev);
 145                 priv->mode_config_initialized = false;
 146         }
 147 }
 148
 149 /*
 150  * It can operate in one of three modes: 0, 1 or Sleep.
 151  */
 152 void hibmc_set_power_mode(struct hibmc_drm_private *priv,
 153                           unsigned int power_mode)
 154 {
 155         unsigned int control_value = 0;
 156         void __iomem   *mmio = priv->mmio;
 157         unsigned int input = 1;
 158
 159         if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
 160                 return;
 161
 162         if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
 163                 input = 0;
 164
 165         control_value = readl(mmio + HIBMC_POWER_MODE_CTRL);
 166         control_value &= ~(HIBMC_PW_MODE_CTL_MODE_MASK |
 167                            HIBMC_PW_MODE_CTL_OSC_INPUT_MASK);
 168         control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_MODE, power_mode);
 169         control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_OSC_INPUT, input);
 170         writel(control_value, mmio + HIBMC_POWER_MODE_CTRL);
 171 }
 172
 173 void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
 174 {
 175         unsigned int gate_reg;
 176         unsigned int mode;
 177         void __iomem   *mmio = priv->mmio;
 178
 179         /* Get current power mode. */
 180         mode = (readl(mmio + HIBMC_POWER_MODE_CTRL) &
 181                 HIBMC_PW_MODE_CTL_MODE_MASK) >> HIBMC_PW_MODE_CTL_MODE_SHIFT;
 182
 183         switch (mode) {
 184         case HIBMC_PW_MODE_CTL_MODE_MODE0:
 185                 gate_reg = HIBMC_MODE0_GATE;
 186                 break;
 187
 188         case HIBMC_PW_MODE_CTL_MODE_MODE1:
 189                 gate_reg = HIBMC_MODE1_GATE;
 190                 break;
 191
 192         default:
 193                 gate_reg = HIBMC_MODE0_GATE;
 194                 break;
 195         }
 196         writel(gate, mmio + gate_reg);
 197 }
 198
 199 static void hibmc_hw_config(struct hibmc_drm_private *priv)
 200 {
 201         unsigned int reg;
 202
 203         /* On hardware reset, power mode 0 is default. */
 204         hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
 205
 206         /* Enable display power gate & LOCALMEM power gate*/
 207         reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
 208         reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
 209         reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
 210         reg |= HIBMC_CURR_GATE_DISPLAY(1);
 211         reg |= HIBMC_CURR_GATE_LOCALMEM(1);
 212
 213         hibmc_set_current_gate(priv, reg);
 214
 215         /*
 216          * Reset the memory controller. If the memory controller
 217          * is not reset in chip,the system might hang when sw accesses
 218          * the memory.The memory should be resetted after
 219          * changing the MXCLK.
 220          */
 221         reg = readl(priv->mmio + HIBMC_MISC_CTRL);
 222         reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
 223         reg |= HIBMC_MSCCTL_LOCALMEM_RESET(0);
 224         writel(reg, priv->mmio + HIBMC_MISC_CTRL);
 225
 226         reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
 227         reg |= HIBMC_MSCCTL_LOCALMEM_RESET(1);
 228
 229         writel(reg, priv->mmio + HIBMC_MISC_CTRL);
 230 }
 231
 232 static int hibmc_hw_map(struct hibmc_drm_private *priv)
 233 {
 234         struct drm_device *dev = priv->dev;
 235         struct pci_dev *pdev = dev->pdev;
 236         resource_size_t addr, size, ioaddr, iosize;
 237
 238         ioaddr = pci_resource_start(pdev, 1);
 239         iosize = pci_resource_len(pdev, 1);
 240         priv->mmio = devm_ioremap_nocache(dev->dev, ioaddr, iosize);
 241         if (!priv->mmio) {
 242                 DRM_ERROR("Cannot map mmio region\n");
 243                 return -ENOMEM;
 244         }
 245
 246         addr = pci_resource_start(pdev, 0);
 247         size = pci_resource_len(pdev, 0);
 248         priv->fb_map = devm_ioremap(dev->dev, addr, size);
 249         if (!priv->fb_map) {
 250                 DRM_ERROR("Cannot map framebuffer\n");
 251                 return -ENOMEM;
 252         }
 253         priv->fb_base = addr;
 254         priv->fb_size = size;
 255
 256         return 0;
 257 }
 258
 259 static int hibmc_hw_init(struct hibmc_drm_private *priv)
 260 {
 261         int ret;
 262
 263         ret = hibmc_hw_map(priv);
 264         if (ret)
 265                 return ret;
 266
 267         hibmc_hw_config(priv);
 268
 269         return 0;
 270 }
 271
 272 static int hibmc_unload(struct drm_device *dev)
 273 {
 274         struct hibmc_drm_private *priv = dev->dev_private;
 275
 276         hibmc_fbdev_fini(priv);
 277
 278         drm_atomic_helper_shutdown(dev);
 279
 280         if (dev->irq_enabled)
 281                 drm_irq_uninstall(dev);
 282         if (priv->msi_enabled)
 283                 pci_disable_msi(dev->pdev);
 284
 285         hibmc_kms_fini(priv);
 286         hibmc_mm_fini(priv);
 287         dev->dev_private = NULL;
 288         return 0;
 289 }
 290
 291 static int hibmc_load(struct drm_device *dev)
 292 {
 293         struct hibmc_drm_private *priv;
 294         int ret;
 295
 296         priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
 297         if (!priv) {
 298                 DRM_ERROR("no memory to allocate for hibmc_drm_private\n");
 299                 return -ENOMEM;
 300         }
 301         dev->dev_private = priv;
 302         priv->dev = dev;
 303
 304         ret = hibmc_hw_init(priv);
 305         if (ret)
 306                 goto err;
 307
 308         ret = hibmc_mm_init(priv);
 309         if (ret)
 310                 goto err;
 311
 312         ret = hibmc_kms_init(priv);
 313         if (ret)
 314                 goto err;
 315
 316         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 317         if (ret) {
 318                 DRM_ERROR("failed to initialize vblank: %d\n", ret);
 319                 goto err;
 320         }
 321
 322         priv->msi_enabled = 0;
 323         ret = pci_enable_msi(dev->pdev);
 324         if (ret) {
 325                 DRM_WARN("enabling MSI failed: %d\n", ret);
 326         } else {
 327                 priv->msi_enabled = 1;
 328                 ret = drm_irq_install(dev, dev->pdev->irq);
 329                 if (ret)
 330                         DRM_WARN("install irq failed: %d\n", ret);
 331         }
 332
 333         /* reset all the states of crtc/plane/encoder/connector */
 334         drm_mode_config_reset(dev);
 335
 336         ret = hibmc_fbdev_init(priv);
 337         if (ret) {
 338                 DRM_ERROR("failed to initialize fbdev: %d\n", ret);
 339                 goto err;
 340         }
 341
 342         return 0;
 343
 344 err:
 345         hibmc_unload(dev);
 346         DRM_ERROR("failed to initialize drm driver: %d\n", ret);
 347         return ret;
 348 }
 349
 350 static int hibmc_pci_probe(struct pci_dev *pdev,
 351                            const struct pci_device_id *ent)
 352 {
 353         struct drm_device *dev;
 354         int ret;
 355
 356         dev = drm_dev_alloc(&hibmc_driver, &pdev->dev);
 357         if (IS_ERR(dev)) {
 358                 DRM_ERROR("failed to allocate drm_device\n");
 359                 return PTR_ERR(dev);
 360         }
 361
 362         dev->pdev = pdev;
 363         pci_set_drvdata(pdev, dev);
 364
 365         ret = pci_enable_device(pdev);
 366         if (ret) {
 367                 DRM_ERROR("failed to enable pci device: %d\n", ret);
 368                 goto err_free;
 369         }
 370
 371         ret = hibmc_load(dev);
 372         if (ret) {
 373                 DRM_ERROR("failed to load hibmc: %d\n", ret);
 374                 goto err_disable;
 375         }
 376
 377         ret = drm_dev_register(dev, 0);
 378         if (ret) {
 379                 DRM_ERROR("failed to register drv for userspace access: %d\n",
 380                           ret);
 381                 goto err_unload;
 382         }
 383         return 0;
 384
 385 err_unload:
 386         hibmc_unload(dev);
 387 err_disable:
 388         pci_disable_device(pdev);
 389 err_free:
 390         drm_dev_unref(dev);
 391
 392         return ret;
 393 }
 394
 395 static void hibmc_pci_remove(struct pci_dev *pdev)
 396 {
 397         struct drm_device *dev = pci_get_drvdata(pdev);
 398
 399         drm_dev_unregister(dev);
 400         hibmc_unload(dev);
 401         drm_dev_unref(dev);
 402 }
 403
 404 static struct pci_device_id hibmc_pci_table[] = {
 405         {0x19e5, 0x1711, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 406         {0,}
 407 };
 408
 409 static struct pci_driver hibmc_pci_driver = {
 410         .name =         "hibmc-drm",
 411         .id_table =     hibmc_pci_table,
 412         .probe =        hibmc_pci_probe,
 413         .remove =       hibmc_pci_remove,
 414         .driver.pm =    &hibmc_pm_ops,
 415 };
 416
 417 static int __init hibmc_init(void)
 418 {
 419         return pci_register_driver(&hibmc_pci_driver);
 420 }
 421
 422 static void __exit hibmc_exit(void)
 423 {
 424         return pci_unregister_driver(&hibmc_pci_driver);
 425 }
 426
 427 module_init(hibmc_init);
 428 module_exit(hibmc_exit);
 429
 430 MODULE_DEVICE_TABLE(pci, hibmc_pci_table);
 431 MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>");
 432 MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc");
 433 MODULE_LICENSE("GPL v2");