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