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// SPDX-License-Identifier: GPL-2.0-or-later
/* Hisilicon Hibmc SoC drm driver
*
* Based on the bochs drm driver.
*
* Copyright (c) 2016 Huawei Limited.
*
* Author:
* Rongrong Zou <zourongrong@huawei.com>
* Rongrong Zou <zourongrong@gmail.com>
* Jianhua Li <lijianhua@huawei.com>
*/
#include <linux/console.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_vram_helper.h>
#include <drm/drm_irq.h>
#include <drm/drm_managed.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "hibmc_drm_drv.h"
#include "hibmc_drm_regs.h"
DEFINE_DRM_GEM_FOPS(hibmc_fops);
static irqreturn_t hibmc_drm_interrupt(int irq, void *arg)
{
struct drm_device *dev = (struct drm_device *)arg;
struct hibmc_drm_private *priv =
(struct hibmc_drm_private *)dev->dev_private;
u32 status;
status = readl(priv->mmio + HIBMC_RAW_INTERRUPT);
if (status & HIBMC_RAW_INTERRUPT_VBLANK(1)) {
writel(HIBMC_RAW_INTERRUPT_VBLANK(1),
priv->mmio + HIBMC_RAW_INTERRUPT);
drm_handle_vblank(dev, 0);
}
return IRQ_HANDLED;
}
static struct drm_driver hibmc_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
.fops = &hibmc_fops,
.name = "hibmc",
.date = "20160828",
.desc = "hibmc drm driver",
.major = 1,
.minor = 0,
.debugfs_init = drm_vram_mm_debugfs_init,
.dumb_create = hibmc_dumb_create,
.dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset,
.gem_prime_mmap = drm_gem_prime_mmap,
.irq_handler = hibmc_drm_interrupt,
};
static int __maybe_unused hibmc_pm_suspend(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
return drm_mode_config_helper_suspend(drm_dev);
}
static int __maybe_unused hibmc_pm_resume(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
return drm_mode_config_helper_resume(drm_dev);
}
static const struct dev_pm_ops hibmc_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
hibmc_pm_resume)
};
static int hibmc_kms_init(struct hibmc_drm_private *priv)
{
int ret;
drm_mode_config_init(priv->dev);
priv->mode_config_initialized = true;
priv->dev->mode_config.min_width = 0;
priv->dev->mode_config.min_height = 0;
priv->dev->mode_config.max_width = 1920;
priv->dev->mode_config.max_height = 1200;
priv->dev->mode_config.fb_base = priv->fb_base;
priv->dev->mode_config.preferred_depth = 32;
priv->dev->mode_config.prefer_shadow = 1;
priv->dev->mode_config.funcs = (void *)&hibmc_mode_funcs;
ret = hibmc_de_init(priv);
if (ret) {
DRM_ERROR("failed to init de: %d\n", ret);
return ret;
}
ret = hibmc_vdac_init(priv);
if (ret) {
DRM_ERROR("failed to init vdac: %d\n", ret);
return ret;
}
return 0;
}
static void hibmc_kms_fini(struct hibmc_drm_private *priv)
{
if (priv->mode_config_initialized) {
drm_mode_config_cleanup(priv->dev);
priv->mode_config_initialized = false;
}
}
/*
* It can operate in one of three modes: 0, 1 or Sleep.
*/
void hibmc_set_power_mode(struct hibmc_drm_private *priv,
unsigned int power_mode)
{
unsigned int control_value = 0;
void __iomem *mmio = priv->mmio;
unsigned int input = 1;
if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
return;
if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
input = 0;
control_value = readl(mmio + HIBMC_POWER_MODE_CTRL);
control_value &= ~(HIBMC_PW_MODE_CTL_MODE_MASK |
HIBMC_PW_MODE_CTL_OSC_INPUT_MASK);
control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_MODE, power_mode);
control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_OSC_INPUT, input);
writel(control_value, mmio + HIBMC_POWER_MODE_CTRL);
}
void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
{
unsigned int gate_reg;
unsigned int mode;
void __iomem *mmio = priv->mmio;
/* Get current power mode. */
mode = (readl(mmio + HIBMC_POWER_MODE_CTRL) &
HIBMC_PW_MODE_CTL_MODE_MASK) >> HIBMC_PW_MODE_CTL_MODE_SHIFT;
switch (mode) {
case HIBMC_PW_MODE_CTL_MODE_MODE0:
gate_reg = HIBMC_MODE0_GATE;
break;
case HIBMC_PW_MODE_CTL_MODE_MODE1:
gate_reg = HIBMC_MODE1_GATE;
break;
default:
gate_reg = HIBMC_MODE0_GATE;
break;
}
writel(gate, mmio + gate_reg);
}
static void hibmc_hw_config(struct hibmc_drm_private *priv)
{
unsigned int reg;
/* On hardware reset, power mode 0 is default. */
hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
/* Enable display power gate & LOCALMEM power gate*/
reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
reg |= HIBMC_CURR_GATE_DISPLAY(1);
reg |= HIBMC_CURR_GATE_LOCALMEM(1);
hibmc_set_current_gate(priv, reg);
/*
* Reset the memory controller. If the memory controller
* is not reset in chip,the system might hang when sw accesses
* the memory.The memory should be resetted after
* changing the MXCLK.
*/
reg = readl(priv->mmio + HIBMC_MISC_CTRL);
reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
reg |= HIBMC_MSCCTL_LOCALMEM_RESET(0);
writel(reg, priv->mmio + HIBMC_MISC_CTRL);
reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
reg |= HIBMC_MSCCTL_LOCALMEM_RESET(1);
writel(reg, priv->mmio + HIBMC_MISC_CTRL);
}
static int hibmc_hw_map(struct hibmc_drm_private *priv)
{
struct drm_device *dev = priv->dev;
struct pci_dev *pdev = dev->pdev;
resource_size_t addr, size, ioaddr, iosize;
ioaddr = pci_resource_start(pdev, 1);
iosize = pci_resource_len(pdev, 1);
priv->mmio = devm_ioremap(dev->dev, ioaddr, iosize);
if (!priv->mmio) {
DRM_ERROR("Cannot map mmio region\n");
return -ENOMEM;
}
addr = pci_resource_start(pdev, 0);
size = pci_resource_len(pdev, 0);
priv->fb_map = devm_ioremap(dev->dev, addr, size);
if (!priv->fb_map) {
DRM_ERROR("Cannot map framebuffer\n");
return -ENOMEM;
}
priv->fb_base = addr;
priv->fb_size = size;
return 0;
}
static int hibmc_hw_init(struct hibmc_drm_private *priv)
{
int ret;
ret = hibmc_hw_map(priv);
if (ret)
return ret;
hibmc_hw_config(priv);
return 0;
}
static int hibmc_unload(struct drm_device *dev)
{
struct hibmc_drm_private *priv = dev->dev_private;
drm_atomic_helper_shutdown(dev);
if (dev->irq_enabled)
drm_irq_uninstall(dev);
pci_disable_msi(dev->pdev);
hibmc_kms_fini(priv);
hibmc_mm_fini(priv);
dev->dev_private = NULL;
return 0;
}
static int hibmc_load(struct drm_device *dev)
{
struct hibmc_drm_private *priv;
int ret;
priv = drmm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv) {
DRM_ERROR("no memory to allocate for hibmc_drm_private\n");
return -ENOMEM;
}
dev->dev_private = priv;
priv->dev = dev;
ret = hibmc_hw_init(priv);
if (ret)
goto err;
ret = hibmc_mm_init(priv);
if (ret)
goto err;
ret = hibmc_kms_init(priv);
if (ret)
goto err;
ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
if (ret) {
DRM_ERROR("failed to initialize vblank: %d\n", ret);
goto err;
}
ret = pci_enable_msi(dev->pdev);
if (ret) {
DRM_WARN("enabling MSI failed: %d\n", ret);
} else {
ret = drm_irq_install(dev, dev->pdev->irq);
if (ret)
DRM_WARN("install irq failed: %d\n", ret);
}
/* reset all the states of crtc/plane/encoder/connector */
drm_mode_config_reset(dev);
drm_fbdev_generic_setup(dev, dev->mode_config.preferred_depth);
return 0;
err:
hibmc_unload(dev);
DRM_ERROR("failed to initialize drm driver: %d\n", ret);
return ret;
}
static int hibmc_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct drm_device *dev;
int ret;
ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev,
"hibmcdrmfb");
if (ret)
return ret;
dev = drm_dev_alloc(&hibmc_driver, &pdev->dev);
if (IS_ERR(dev)) {
DRM_ERROR("failed to allocate drm_device\n");
return PTR_ERR(dev);
}
dev->pdev = pdev;
pci_set_drvdata(pdev, dev);
ret = pci_enable_device(pdev);
if (ret) {
DRM_ERROR("failed to enable pci device: %d\n", ret);
goto err_free;
}
ret = hibmc_load(dev);
if (ret) {
DRM_ERROR("failed to load hibmc: %d\n", ret);
goto err_disable;
}
ret = drm_dev_register(dev, 0);
if (ret) {
DRM_ERROR("failed to register drv for userspace access: %d\n",
ret);
goto err_unload;
}
return 0;
err_unload:
hibmc_unload(dev);
err_disable:
pci_disable_device(pdev);
err_free:
drm_dev_put(dev);
return ret;
}
static void hibmc_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
drm_dev_unregister(dev);
hibmc_unload(dev);
drm_dev_put(dev);
}
static struct pci_device_id hibmc_pci_table[] = {
{ PCI_VDEVICE(HUAWEI, 0x1711) },
{0,}
};
static struct pci_driver hibmc_pci_driver = {
.name = "hibmc-drm",
.id_table = hibmc_pci_table,
.probe = hibmc_pci_probe,
.remove = hibmc_pci_remove,
.driver.pm = &hibmc_pm_ops,
};
module_pci_driver(hibmc_pci_driver);
MODULE_DEVICE_TABLE(pci, hibmc_pci_table);
MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>");
MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc");
MODULE_LICENSE("GPL v2");
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