diff options
Diffstat (limited to 'drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c new file mode 100644 index 000000000000..6d20580f89b8 --- /dev/null +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c @@ -0,0 +1,308 @@ +/* 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> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/console.h> +#include <linux/module.h> + +#include "hibmc_drm_drv.h" +#include "hibmc_drm_regs.h" + +static const struct file_operations hibmc_fops = { + .owner = THIS_MODULE, + .open = drm_open, + .release = drm_release, + .unlocked_ioctl = drm_ioctl, + .compat_ioctl = drm_compat_ioctl, + .poll = drm_poll, + .read = drm_read, + .llseek = no_llseek, +}; + +static int hibmc_enable_vblank(struct drm_device *dev, unsigned int pipe) +{ + return 0; +} + +static void hibmc_disable_vblank(struct drm_device *dev, unsigned int pipe) +{ +} + +static struct drm_driver hibmc_driver = { + .fops = &hibmc_fops, + .name = "hibmc", + .date = "20160828", + .desc = "hibmc drm driver", + .major = 1, + .minor = 0, + .get_vblank_counter = drm_vblank_no_hw_counter, + .enable_vblank = hibmc_enable_vblank, + .disable_vblank = hibmc_disable_vblank, +}; + +static int hibmc_pm_suspend(struct device *dev) +{ + return 0; +} + +static int hibmc_pm_resume(struct device *dev) +{ + return 0; +} + +static const struct dev_pm_ops hibmc_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend, + hibmc_pm_resume) +}; + +/* + * 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_nocache(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) +{ + return 0; +} + +static int hibmc_load(struct drm_device *dev) +{ + struct hibmc_drm_private *priv; + int ret; + + priv = devm_kzalloc(dev->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; + + 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; + + dev = drm_dev_alloc(&hibmc_driver, &pdev->dev); + if (!dev) { + DRM_ERROR("failed to allocate drm_device\n"); + return -ENOMEM; + } + + 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_unref(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_unref(dev); +} + +static struct pci_device_id hibmc_pci_table[] = { + {0x19e5, 0x1711, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {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, +}; + +static int __init hibmc_init(void) +{ + return pci_register_driver(&hibmc_pci_driver); +} + +static void __exit hibmc_exit(void) +{ + return pci_unregister_driver(&hibmc_pci_driver); +} + +module_init(hibmc_init); +module_exit(hibmc_exit); + +MODULE_DEVICE_TABLE(pci, hibmc_pci_table); +MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>"); +MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc"); +MODULE_LICENSE("GPL v2"); |