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