1 /* Hisilicon Hibmc SoC drm driver
3 * Based on the bochs drm driver.
5 * Copyright (c) 2016 Huawei Limited.
8 * Rongrong Zou <zourongrong@huawei.com>
9 * Rongrong Zou <zourongrong@gmail.com>
10 * Jianhua Li <lijianhua@huawei.com>
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.
19 #include <linux/console.h>
20 #include <linux/module.h>
22 #include <drm/drm_atomic_helper.h>
23 #include <drm/drm_crtc_helper.h>
25 #include "hibmc_drm_drv.h"
26 #include "hibmc_drm_regs.h"
28 static const struct file_operations hibmc_fops = {
31 .release = drm_release,
32 .unlocked_ioctl = drm_ioctl,
33 .compat_ioctl = drm_compat_ioctl,
40 irqreturn_t hibmc_drm_interrupt(int irq, void *arg)
42 struct drm_device *dev = (struct drm_device *)arg;
43 struct hibmc_drm_private *priv =
44 (struct hibmc_drm_private *)dev->dev_private;
47 status = readl(priv->mmio + HIBMC_RAW_INTERRUPT);
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);
58 static struct drm_driver hibmc_driver = {
59 .driver_features = DRIVER_GEM | DRIVER_MODESET |
60 DRIVER_ATOMIC | DRIVER_HAVE_IRQ,
64 .desc = "hibmc drm driver",
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,
73 static int __maybe_unused hibmc_pm_suspend(struct device *dev)
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;
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);
91 static int __maybe_unused hibmc_pm_resume(struct device *dev)
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;
97 drm_atomic_helper_resume(drm_dev, priv->suspend_state);
98 drm_kms_helper_poll_enable(drm_dev);
103 static const struct dev_pm_ops hibmc_pm_ops = {
104 SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
108 static int hibmc_kms_init(struct hibmc_drm_private *priv)
112 drm_mode_config_init(priv->dev);
113 priv->mode_config_initialized = true;
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;
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;
124 priv->dev->mode_config.funcs = (void *)&hibmc_mode_funcs;
126 ret = hibmc_de_init(priv);
128 DRM_ERROR("failed to init de: %d\n", ret);
132 ret = hibmc_vdac_init(priv);
134 DRM_ERROR("failed to init vdac: %d\n", ret);
141 static void hibmc_kms_fini(struct hibmc_drm_private *priv)
143 if (priv->mode_config_initialized) {
144 drm_mode_config_cleanup(priv->dev);
145 priv->mode_config_initialized = false;
150 * It can operate in one of three modes: 0, 1 or Sleep.
152 void hibmc_set_power_mode(struct hibmc_drm_private *priv,
153 unsigned int power_mode)
155 unsigned int control_value = 0;
156 void __iomem *mmio = priv->mmio;
157 unsigned int input = 1;
159 if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
162 if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
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);
173 void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
175 unsigned int gate_reg;
177 void __iomem *mmio = priv->mmio;
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;
184 case HIBMC_PW_MODE_CTL_MODE_MODE0:
185 gate_reg = HIBMC_MODE0_GATE;
188 case HIBMC_PW_MODE_CTL_MODE_MODE1:
189 gate_reg = HIBMC_MODE1_GATE;
193 gate_reg = HIBMC_MODE0_GATE;
196 writel(gate, mmio + gate_reg);
199 static void hibmc_hw_config(struct hibmc_drm_private *priv)
203 /* On hardware reset, power mode 0 is default. */
204 hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
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);
213 hibmc_set_current_gate(priv, reg);
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.
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);
226 reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
227 reg |= HIBMC_MSCCTL_LOCALMEM_RESET(1);
229 writel(reg, priv->mmio + HIBMC_MISC_CTRL);
232 static int hibmc_hw_map(struct hibmc_drm_private *priv)
234 struct drm_device *dev = priv->dev;
235 struct pci_dev *pdev = dev->pdev;
236 resource_size_t addr, size, ioaddr, iosize;
238 ioaddr = pci_resource_start(pdev, 1);
239 iosize = pci_resource_len(pdev, 1);
240 priv->mmio = devm_ioremap_nocache(dev->dev, ioaddr, iosize);
242 DRM_ERROR("Cannot map mmio region\n");
246 addr = pci_resource_start(pdev, 0);
247 size = pci_resource_len(pdev, 0);
248 priv->fb_map = devm_ioremap(dev->dev, addr, size);
250 DRM_ERROR("Cannot map framebuffer\n");
253 priv->fb_base = addr;
254 priv->fb_size = size;
259 static int hibmc_hw_init(struct hibmc_drm_private *priv)
263 ret = hibmc_hw_map(priv);
267 hibmc_hw_config(priv);
272 static int hibmc_unload(struct drm_device *dev)
274 struct hibmc_drm_private *priv = dev->dev_private;
276 hibmc_fbdev_fini(priv);
278 drm_atomic_helper_shutdown(dev);
280 if (dev->irq_enabled)
281 drm_irq_uninstall(dev);
282 if (priv->msi_enabled)
283 pci_disable_msi(dev->pdev);
285 hibmc_kms_fini(priv);
287 dev->dev_private = NULL;
291 static int hibmc_load(struct drm_device *dev)
293 struct hibmc_drm_private *priv;
296 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
298 DRM_ERROR("no memory to allocate for hibmc_drm_private\n");
301 dev->dev_private = priv;
304 ret = hibmc_hw_init(priv);
308 ret = hibmc_mm_init(priv);
312 ret = hibmc_kms_init(priv);
316 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
318 DRM_ERROR("failed to initialize vblank: %d\n", ret);
322 priv->msi_enabled = 0;
323 ret = pci_enable_msi(dev->pdev);
325 DRM_WARN("enabling MSI failed: %d\n", ret);
327 priv->msi_enabled = 1;
328 ret = drm_irq_install(dev, dev->pdev->irq);
330 DRM_WARN("install irq failed: %d\n", ret);
333 /* reset all the states of crtc/plane/encoder/connector */
334 drm_mode_config_reset(dev);
336 ret = hibmc_fbdev_init(priv);
338 DRM_ERROR("failed to initialize fbdev: %d\n", ret);
346 DRM_ERROR("failed to initialize drm driver: %d\n", ret);
350 static int hibmc_pci_probe(struct pci_dev *pdev,
351 const struct pci_device_id *ent)
353 struct drm_device *dev;
356 dev = drm_dev_alloc(&hibmc_driver, &pdev->dev);
358 DRM_ERROR("failed to allocate drm_device\n");
363 pci_set_drvdata(pdev, dev);
365 ret = pci_enable_device(pdev);
367 DRM_ERROR("failed to enable pci device: %d\n", ret);
371 ret = hibmc_load(dev);
373 DRM_ERROR("failed to load hibmc: %d\n", ret);
377 ret = drm_dev_register(dev, 0);
379 DRM_ERROR("failed to register drv for userspace access: %d\n",
388 pci_disable_device(pdev);
395 static void hibmc_pci_remove(struct pci_dev *pdev)
397 struct drm_device *dev = pci_get_drvdata(pdev);
399 drm_dev_unregister(dev);
404 static struct pci_device_id hibmc_pci_table[] = {
405 {0x19e5, 0x1711, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
409 static struct pci_driver hibmc_pci_driver = {
411 .id_table = hibmc_pci_table,
412 .probe = hibmc_pci_probe,
413 .remove = hibmc_pci_remove,
414 .driver.pm = &hibmc_pm_ops,
417 static int __init hibmc_init(void)
419 return pci_register_driver(&hibmc_pci_driver);
422 static void __exit hibmc_exit(void)
424 return pci_unregister_driver(&hibmc_pci_driver);
427 module_init(hibmc_init);
428 module_exit(hibmc_exit);
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");