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@@ -0,0 +1,308 @@
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+/* Hisilicon Hibmc SoC drm driver
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+ *
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+ * Based on the bochs drm driver.
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+ *
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+ * Copyright (c) 2016 Huawei Limited.
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+ *
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+ * Author:
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+ * Rongrong Zou <zourongrong@huawei.com>
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+ * Rongrong Zou <zourongrong@gmail.com>
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+ * Jianhua Li <lijianhua@huawei.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ */
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+
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+#include <linux/console.h>
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+#include <linux/module.h>
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+
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+#include "hibmc_drm_drv.h"
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+#include "hibmc_drm_regs.h"
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+
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+static const struct file_operations hibmc_fops = {
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+ .owner = THIS_MODULE,
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+ .open = drm_open,
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+ .release = drm_release,
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+ .unlocked_ioctl = drm_ioctl,
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+ .compat_ioctl = drm_compat_ioctl,
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+ .poll = drm_poll,
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+ .read = drm_read,
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+ .llseek = no_llseek,
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+};
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+
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+static int hibmc_enable_vblank(struct drm_device *dev, unsigned int pipe)
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+{
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+ return 0;
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+}
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+
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+static void hibmc_disable_vblank(struct drm_device *dev, unsigned int pipe)
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+{
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+}
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+
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+static struct drm_driver hibmc_driver = {
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+ .fops = &hibmc_fops,
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+ .name = "hibmc",
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+ .date = "20160828",
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+ .desc = "hibmc drm driver",
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+ .major = 1,
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+ .minor = 0,
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+ .get_vblank_counter = drm_vblank_no_hw_counter,
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+ .enable_vblank = hibmc_enable_vblank,
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+ .disable_vblank = hibmc_disable_vblank,
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+};
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+
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+static int hibmc_pm_suspend(struct device *dev)
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+{
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+ return 0;
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+}
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+
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+static int hibmc_pm_resume(struct device *dev)
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+{
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+ return 0;
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+}
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+
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+static const struct dev_pm_ops hibmc_pm_ops = {
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+ SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
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+ hibmc_pm_resume)
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+};
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+
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+/*
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+ * It can operate in one of three modes: 0, 1 or Sleep.
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+ */
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+void hibmc_set_power_mode(struct hibmc_drm_private *priv,
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+ unsigned int power_mode)
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+{
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+ unsigned int control_value = 0;
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+ void __iomem *mmio = priv->mmio;
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+ unsigned int input = 1;
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+
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+ if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
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+ return;
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+
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+ if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
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+ input = 0;
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+
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+ control_value = readl(mmio + HIBMC_POWER_MODE_CTRL);
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+ control_value &= ~(HIBMC_PW_MODE_CTL_MODE_MASK |
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+ HIBMC_PW_MODE_CTL_OSC_INPUT_MASK);
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+ control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_MODE, power_mode);
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+ control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_OSC_INPUT, input);
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+ writel(control_value, mmio + HIBMC_POWER_MODE_CTRL);
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+}
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+
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+void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
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+{
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+ unsigned int gate_reg;
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+ unsigned int mode;
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+ void __iomem *mmio = priv->mmio;
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+
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+ /* Get current power mode. */
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+ mode = (readl(mmio + HIBMC_POWER_MODE_CTRL) &
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+ HIBMC_PW_MODE_CTL_MODE_MASK) >> HIBMC_PW_MODE_CTL_MODE_SHIFT;
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+
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+ switch (mode) {
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+ case HIBMC_PW_MODE_CTL_MODE_MODE0:
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+ gate_reg = HIBMC_MODE0_GATE;
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+ break;
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+
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+ case HIBMC_PW_MODE_CTL_MODE_MODE1:
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+ gate_reg = HIBMC_MODE1_GATE;
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+ break;
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+
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+ default:
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+ gate_reg = HIBMC_MODE0_GATE;
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+ break;
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+ }
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+ writel(gate, mmio + gate_reg);
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+}
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+
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+static void hibmc_hw_config(struct hibmc_drm_private *priv)
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+{
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+ unsigned int reg;
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+
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+ /* On hardware reset, power mode 0 is default. */
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+ hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
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+
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+ /* Enable display power gate & LOCALMEM power gate*/
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+ reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
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+ reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
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+ reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
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+ reg |= HIBMC_CURR_GATE_DISPLAY(1);
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+ reg |= HIBMC_CURR_GATE_LOCALMEM(1);
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+
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+ hibmc_set_current_gate(priv, reg);
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+
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+ /*
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+ * Reset the memory controller. If the memory controller
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+ * is not reset in chip,the system might hang when sw accesses
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+ * the memory.The memory should be resetted after
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+ * changing the MXCLK.
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+ */
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+ reg = readl(priv->mmio + HIBMC_MISC_CTRL);
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+ reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
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+ reg |= HIBMC_MSCCTL_LOCALMEM_RESET(0);
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+ writel(reg, priv->mmio + HIBMC_MISC_CTRL);
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+
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+ reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
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+ reg |= HIBMC_MSCCTL_LOCALMEM_RESET(1);
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+
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+ writel(reg, priv->mmio + HIBMC_MISC_CTRL);
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+}
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+
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+static int hibmc_hw_map(struct hibmc_drm_private *priv)
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+{
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+ struct drm_device *dev = priv->dev;
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+ struct pci_dev *pdev = dev->pdev;
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+ resource_size_t addr, size, ioaddr, iosize;
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+
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+ ioaddr = pci_resource_start(pdev, 1);
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+ iosize = pci_resource_len(pdev, 1);
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+ priv->mmio = devm_ioremap_nocache(dev->dev, ioaddr, iosize);
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+ if (!priv->mmio) {
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+ DRM_ERROR("Cannot map mmio region\n");
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+ return -ENOMEM;
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+ }
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+
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+ addr = pci_resource_start(pdev, 0);
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+ size = pci_resource_len(pdev, 0);
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+ priv->fb_map = devm_ioremap(dev->dev, addr, size);
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+ if (!priv->fb_map) {
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+ DRM_ERROR("Cannot map framebuffer\n");
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+ return -ENOMEM;
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+ }
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+ priv->fb_base = addr;
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+ priv->fb_size = size;
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+
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+ return 0;
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+}
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+
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+static int hibmc_hw_init(struct hibmc_drm_private *priv)
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+{
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+ int ret;
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+
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+ ret = hibmc_hw_map(priv);
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+ if (ret)
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+ return ret;
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+
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+ hibmc_hw_config(priv);
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+
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+ return 0;
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+}
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+
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+static int hibmc_unload(struct drm_device *dev)
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+{
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+ return 0;
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+}
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+
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+static int hibmc_load(struct drm_device *dev)
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+{
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+ struct hibmc_drm_private *priv;
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+ int ret;
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+
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+ priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
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+ if (!priv) {
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+ DRM_ERROR("no memory to allocate for hibmc_drm_private\n");
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+ return -ENOMEM;
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+ }
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+ dev->dev_private = priv;
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+ priv->dev = dev;
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+
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+ ret = hibmc_hw_init(priv);
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+ if (ret)
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+ goto err;
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+
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+ return 0;
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+
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+err:
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+ hibmc_unload(dev);
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+ DRM_ERROR("failed to initialize drm driver: %d\n", ret);
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+ return ret;
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+}
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+
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+static int hibmc_pci_probe(struct pci_dev *pdev,
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+ const struct pci_device_id *ent)
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+{
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+ struct drm_device *dev;
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+ int ret;
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+
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+ dev = drm_dev_alloc(&hibmc_driver, &pdev->dev);
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+ if (!dev) {
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+ DRM_ERROR("failed to allocate drm_device\n");
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+ return -ENOMEM;
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+ }
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+
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+ dev->pdev = pdev;
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+ pci_set_drvdata(pdev, dev);
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+
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+ ret = pci_enable_device(pdev);
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+ if (ret) {
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+ DRM_ERROR("failed to enable pci device: %d\n", ret);
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+ goto err_free;
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+ }
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+
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+ ret = hibmc_load(dev);
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+ if (ret) {
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+ DRM_ERROR("failed to load hibmc: %d\n", ret);
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+ goto err_disable;
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+ }
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+
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+ ret = drm_dev_register(dev, 0);
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+ if (ret) {
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+ DRM_ERROR("failed to register drv for userspace access: %d\n",
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+ ret);
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+ goto err_unload;
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+ }
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+ return 0;
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+
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+err_unload:
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+ hibmc_unload(dev);
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+err_disable:
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+ pci_disable_device(pdev);
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+err_free:
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+ drm_dev_unref(dev);
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+
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+ return ret;
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+}
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+
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+static void hibmc_pci_remove(struct pci_dev *pdev)
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+{
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+ struct drm_device *dev = pci_get_drvdata(pdev);
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+
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+ drm_dev_unregister(dev);
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+ hibmc_unload(dev);
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+ drm_dev_unref(dev);
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+}
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+
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+static struct pci_device_id hibmc_pci_table[] = {
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+ {0x19e5, 0x1711, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
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+ {0,}
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+};
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+
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+static struct pci_driver hibmc_pci_driver = {
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+ .name = "hibmc-drm",
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+ .id_table = hibmc_pci_table,
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+ .probe = hibmc_pci_probe,
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+ .remove = hibmc_pci_remove,
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+ .driver.pm = &hibmc_pm_ops,
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+};
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+
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+static int __init hibmc_init(void)
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+{
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+ return pci_register_driver(&hibmc_pci_driver);
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+}
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+
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+static void __exit hibmc_exit(void)
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+{
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+ return pci_unregister_driver(&hibmc_pci_driver);
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+}
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+
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+module_init(hibmc_init);
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+module_exit(hibmc_exit);
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+
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+MODULE_DEVICE_TABLE(pci, hibmc_pci_table);
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+MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>");
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+MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc");
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+MODULE_LICENSE("GPL v2");
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