| // SPDX-License-Identifier: GPL-2.0-only |
| /************************************************************************** |
| * Copyright (c) 2011, Intel Corporation. |
| * All Rights Reserved. |
| * |
| **************************************************************************/ |
| |
| /* TODO |
| * - Split functions by vbt type |
| * - Make them all take drm_device |
| * - Check ioremap failures |
| */ |
| |
| #include <drm/drm.h> |
| |
| #include "mid_bios.h" |
| #include "psb_drv.h" |
| |
| static void mid_get_fuse_settings(struct drm_device *dev) |
| { |
| struct drm_psb_private *dev_priv = dev->dev_private; |
| struct pci_dev *pci_root = |
| pci_get_domain_bus_and_slot(pci_domain_nr(dev->pdev->bus), |
| 0, 0); |
| uint32_t fuse_value = 0; |
| uint32_t fuse_value_tmp = 0; |
| |
| #define FB_REG06 0xD0810600 |
| #define FB_MIPI_DISABLE (1 << 11) |
| #define FB_REG09 0xD0810900 |
| #define FB_SKU_MASK 0x7000 |
| #define FB_SKU_SHIFT 12 |
| #define FB_SKU_100 0 |
| #define FB_SKU_100L 1 |
| #define FB_SKU_83 2 |
| if (pci_root == NULL) { |
| WARN_ON(1); |
| return; |
| } |
| |
| |
| pci_write_config_dword(pci_root, 0xD0, FB_REG06); |
| pci_read_config_dword(pci_root, 0xD4, &fuse_value); |
| |
| /* FB_MIPI_DISABLE doesn't mean LVDS on with Medfield */ |
| if (IS_MRST(dev)) |
| dev_priv->iLVDS_enable = fuse_value & FB_MIPI_DISABLE; |
| |
| DRM_INFO("internal display is %s\n", |
| dev_priv->iLVDS_enable ? "LVDS display" : "MIPI display"); |
| |
| /* Prevent runtime suspend at start*/ |
| if (dev_priv->iLVDS_enable) { |
| dev_priv->is_lvds_on = true; |
| dev_priv->is_mipi_on = false; |
| } else { |
| dev_priv->is_mipi_on = true; |
| dev_priv->is_lvds_on = false; |
| } |
| |
| dev_priv->video_device_fuse = fuse_value; |
| |
| pci_write_config_dword(pci_root, 0xD0, FB_REG09); |
| pci_read_config_dword(pci_root, 0xD4, &fuse_value); |
| |
| dev_dbg(dev->dev, "SKU values is 0x%x.\n", fuse_value); |
| fuse_value_tmp = (fuse_value & FB_SKU_MASK) >> FB_SKU_SHIFT; |
| |
| dev_priv->fuse_reg_value = fuse_value; |
| |
| switch (fuse_value_tmp) { |
| case FB_SKU_100: |
| dev_priv->core_freq = 200; |
| break; |
| case FB_SKU_100L: |
| dev_priv->core_freq = 100; |
| break; |
| case FB_SKU_83: |
| dev_priv->core_freq = 166; |
| break; |
| default: |
| dev_warn(dev->dev, "Invalid SKU values, SKU value = 0x%08x\n", |
| fuse_value_tmp); |
| dev_priv->core_freq = 0; |
| } |
| dev_dbg(dev->dev, "LNC core clk is %dMHz.\n", dev_priv->core_freq); |
| pci_dev_put(pci_root); |
| } |
| |
| /* |
| * Get the revison ID, B0:D2:F0;0x08 |
| */ |
| static void mid_get_pci_revID(struct drm_psb_private *dev_priv) |
| { |
| uint32_t platform_rev_id = 0; |
| int domain = pci_domain_nr(dev_priv->dev->pdev->bus); |
| struct pci_dev *pci_gfx_root = |
| pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(2, 0)); |
| |
| if (pci_gfx_root == NULL) { |
| WARN_ON(1); |
| return; |
| } |
| pci_read_config_dword(pci_gfx_root, 0x08, &platform_rev_id); |
| dev_priv->platform_rev_id = (uint8_t) platform_rev_id; |
| pci_dev_put(pci_gfx_root); |
| dev_dbg(dev_priv->dev->dev, "platform_rev_id is %x\n", |
| dev_priv->platform_rev_id); |
| } |
| |
| struct mid_vbt_header { |
| u32 signature; |
| u8 revision; |
| } __packed; |
| |
| /* The same for r0 and r1 */ |
| struct vbt_r0 { |
| struct mid_vbt_header vbt_header; |
| u8 size; |
| u8 checksum; |
| } __packed; |
| |
| struct vbt_r10 { |
| struct mid_vbt_header vbt_header; |
| u8 checksum; |
| u16 size; |
| u8 panel_count; |
| u8 primary_panel_idx; |
| u8 secondary_panel_idx; |
| u8 __reserved[5]; |
| } __packed; |
| |
| static int read_vbt_r0(u32 addr, struct vbt_r0 *vbt) |
| { |
| void __iomem *vbt_virtual; |
| |
| vbt_virtual = ioremap(addr, sizeof(*vbt)); |
| if (vbt_virtual == NULL) |
| return -1; |
| |
| memcpy_fromio(vbt, vbt_virtual, sizeof(*vbt)); |
| iounmap(vbt_virtual); |
| |
| return 0; |
| } |
| |
| static int read_vbt_r10(u32 addr, struct vbt_r10 *vbt) |
| { |
| void __iomem *vbt_virtual; |
| |
| vbt_virtual = ioremap(addr, sizeof(*vbt)); |
| if (!vbt_virtual) |
| return -1; |
| |
| memcpy_fromio(vbt, vbt_virtual, sizeof(*vbt)); |
| iounmap(vbt_virtual); |
| |
| return 0; |
| } |
| |
| static int mid_get_vbt_data_r0(struct drm_psb_private *dev_priv, u32 addr) |
| { |
| struct vbt_r0 vbt; |
| void __iomem *gct_virtual; |
| struct gct_r0 gct; |
| u8 bpi; |
| |
| if (read_vbt_r0(addr, &vbt)) |
| return -1; |
| |
| gct_virtual = ioremap(addr + sizeof(vbt), vbt.size - sizeof(vbt)); |
| if (!gct_virtual) |
| return -1; |
| memcpy_fromio(&gct, gct_virtual, sizeof(gct)); |
| iounmap(gct_virtual); |
| |
| bpi = gct.PD.BootPanelIndex; |
| dev_priv->gct_data.bpi = bpi; |
| dev_priv->gct_data.pt = gct.PD.PanelType; |
| dev_priv->gct_data.DTD = gct.panel[bpi].DTD; |
| dev_priv->gct_data.Panel_Port_Control = |
| gct.panel[bpi].Panel_Port_Control; |
| dev_priv->gct_data.Panel_MIPI_Display_Descriptor = |
| gct.panel[bpi].Panel_MIPI_Display_Descriptor; |
| |
| return 0; |
| } |
| |
| static int mid_get_vbt_data_r1(struct drm_psb_private *dev_priv, u32 addr) |
| { |
| struct vbt_r0 vbt; |
| void __iomem *gct_virtual; |
| struct gct_r1 gct; |
| u8 bpi; |
| |
| if (read_vbt_r0(addr, &vbt)) |
| return -1; |
| |
| gct_virtual = ioremap(addr + sizeof(vbt), vbt.size - sizeof(vbt)); |
| if (!gct_virtual) |
| return -1; |
| memcpy_fromio(&gct, gct_virtual, sizeof(gct)); |
| iounmap(gct_virtual); |
| |
| bpi = gct.PD.BootPanelIndex; |
| dev_priv->gct_data.bpi = bpi; |
| dev_priv->gct_data.pt = gct.PD.PanelType; |
| dev_priv->gct_data.DTD = gct.panel[bpi].DTD; |
| dev_priv->gct_data.Panel_Port_Control = |
| gct.panel[bpi].Panel_Port_Control; |
| dev_priv->gct_data.Panel_MIPI_Display_Descriptor = |
| gct.panel[bpi].Panel_MIPI_Display_Descriptor; |
| |
| return 0; |
| } |
| |
| static int mid_get_vbt_data_r10(struct drm_psb_private *dev_priv, u32 addr) |
| { |
| struct vbt_r10 vbt; |
| void __iomem *gct_virtual; |
| struct gct_r10 *gct; |
| struct oaktrail_timing_info *dp_ti = &dev_priv->gct_data.DTD; |
| struct gct_r10_timing_info *ti; |
| int ret = -1; |
| |
| if (read_vbt_r10(addr, &vbt)) |
| return -1; |
| |
| gct = kmalloc_array(vbt.panel_count, sizeof(*gct), GFP_KERNEL); |
| if (!gct) |
| return -ENOMEM; |
| |
| gct_virtual = ioremap(addr + sizeof(vbt), |
| sizeof(*gct) * vbt.panel_count); |
| if (!gct_virtual) |
| goto out; |
| memcpy_fromio(gct, gct_virtual, sizeof(*gct)); |
| iounmap(gct_virtual); |
| |
| dev_priv->gct_data.bpi = vbt.primary_panel_idx; |
| dev_priv->gct_data.Panel_MIPI_Display_Descriptor = |
| gct[vbt.primary_panel_idx].Panel_MIPI_Display_Descriptor; |
| |
| ti = &gct[vbt.primary_panel_idx].DTD; |
| dp_ti->pixel_clock = ti->pixel_clock; |
| dp_ti->hactive_hi = ti->hactive_hi; |
| dp_ti->hactive_lo = ti->hactive_lo; |
| dp_ti->hblank_hi = ti->hblank_hi; |
| dp_ti->hblank_lo = ti->hblank_lo; |
| dp_ti->hsync_offset_hi = ti->hsync_offset_hi; |
| dp_ti->hsync_offset_lo = ti->hsync_offset_lo; |
| dp_ti->hsync_pulse_width_hi = ti->hsync_pulse_width_hi; |
| dp_ti->hsync_pulse_width_lo = ti->hsync_pulse_width_lo; |
| dp_ti->vactive_hi = ti->vactive_hi; |
| dp_ti->vactive_lo = ti->vactive_lo; |
| dp_ti->vblank_hi = ti->vblank_hi; |
| dp_ti->vblank_lo = ti->vblank_lo; |
| dp_ti->vsync_offset_hi = ti->vsync_offset_hi; |
| dp_ti->vsync_offset_lo = ti->vsync_offset_lo; |
| dp_ti->vsync_pulse_width_hi = ti->vsync_pulse_width_hi; |
| dp_ti->vsync_pulse_width_lo = ti->vsync_pulse_width_lo; |
| |
| ret = 0; |
| out: |
| kfree(gct); |
| return ret; |
| } |
| |
| static void mid_get_vbt_data(struct drm_psb_private *dev_priv) |
| { |
| struct drm_device *dev = dev_priv->dev; |
| u32 addr; |
| u8 __iomem *vbt_virtual; |
| struct mid_vbt_header vbt_header; |
| struct pci_dev *pci_gfx_root = |
| pci_get_domain_bus_and_slot(pci_domain_nr(dev->pdev->bus), |
| 0, PCI_DEVFN(2, 0)); |
| int ret = -1; |
| |
| /* Get the address of the platform config vbt */ |
| pci_read_config_dword(pci_gfx_root, 0xFC, &addr); |
| pci_dev_put(pci_gfx_root); |
| |
| dev_dbg(dev->dev, "drm platform config address is %x\n", addr); |
| |
| if (!addr) |
| goto out; |
| |
| /* get the virtual address of the vbt */ |
| vbt_virtual = ioremap(addr, sizeof(vbt_header)); |
| if (!vbt_virtual) |
| goto out; |
| |
| memcpy_fromio(&vbt_header, vbt_virtual, sizeof(vbt_header)); |
| iounmap(vbt_virtual); |
| |
| if (memcmp(&vbt_header.signature, "$GCT", 4)) |
| goto out; |
| |
| dev_dbg(dev->dev, "GCT revision is %02x\n", vbt_header.revision); |
| |
| switch (vbt_header.revision) { |
| case 0x00: |
| ret = mid_get_vbt_data_r0(dev_priv, addr); |
| break; |
| case 0x01: |
| ret = mid_get_vbt_data_r1(dev_priv, addr); |
| break; |
| case 0x10: |
| ret = mid_get_vbt_data_r10(dev_priv, addr); |
| break; |
| default: |
| dev_err(dev->dev, "Unknown revision of GCT!\n"); |
| } |
| |
| out: |
| if (ret) |
| dev_err(dev->dev, "Unable to read GCT!"); |
| else |
| dev_priv->has_gct = true; |
| } |
| |
| int mid_chip_setup(struct drm_device *dev) |
| { |
| struct drm_psb_private *dev_priv = dev->dev_private; |
| mid_get_fuse_settings(dev); |
| mid_get_vbt_data(dev_priv); |
| mid_get_pci_revID(dev_priv); |
| return 0; |
| } |
