gma500: Add the glue to the various BIOS and firmware interfaces
Some of this should one day become a library shared by i915 and gma500 I
suspct. Best however to deal with that later once it is all nice and
stably merged.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/gma500/mid_bios.c b/drivers/gpu/drm/gma500/mid_bios.c
new file mode 100644
index 0000000..7115d1a
--- /dev/null
+++ b/drivers/gpu/drm/gma500/mid_bios.c
@@ -0,0 +1,243 @@
+/**************************************************************************
+ * Copyright (c) 2011, Intel Corporation.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ **************************************************************************/
+
+/* TODO
+ * - Split functions by vbt type
+ * - Make them all take drm_device
+ * - Check ioremap failures
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm.h>
+#include "psb_drm.h"
+#include "psb_drv.h"
+#include "mid_bios.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_bus_and_slot(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_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
+ 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;
+ struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
+
+ 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);
+}
+
+static void mid_get_vbt_data(struct drm_psb_private *dev_priv)
+{
+ struct drm_device *dev = dev_priv->dev;
+ struct oaktrail_vbt *vbt = &dev_priv->vbt_data;
+ u32 addr;
+ u16 new_size;
+ u8 *vbt_virtual;
+ u8 bpi;
+ u8 number_desc = 0;
+ struct oaktrail_timing_info *dp_ti = &dev_priv->gct_data.DTD;
+ struct gct_r10_timing_info ti;
+ void *pGCT;
+ struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
+
+ /* Get the address of the platform config vbt, B0:D2:F0;0xFC */
+ 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);
+
+ /* check for platform config address == 0. */
+ /* this means fw doesn't support vbt */
+
+ if (addr == 0) {
+ vbt->size = 0;
+ return;
+ }
+
+ /* get the virtual address of the vbt */
+ vbt_virtual = ioremap(addr, sizeof(*vbt));
+
+ memcpy(vbt, vbt_virtual, sizeof(*vbt));
+ iounmap(vbt_virtual); /* Free virtual address space */
+
+ dev_dbg(dev->dev, "GCT revision is %x\n", vbt->revision);
+
+ switch (vbt->revision) {
+ case 0:
+ vbt->oaktrail_gct = ioremap(addr + sizeof(*vbt) - 4,
+ vbt->size - sizeof(*vbt) + 4);
+ pGCT = vbt->oaktrail_gct;
+ bpi = ((struct oaktrail_gct_v1 *)pGCT)->PD.BootPanelIndex;
+ dev_priv->gct_data.bpi = bpi;
+ dev_priv->gct_data.pt =
+ ((struct oaktrail_gct_v1 *)pGCT)->PD.PanelType;
+ memcpy(&dev_priv->gct_data.DTD,
+ &((struct oaktrail_gct_v1 *)pGCT)->panel[bpi].DTD,
+ sizeof(struct oaktrail_timing_info));
+ dev_priv->gct_data.Panel_Port_Control =
+ ((struct oaktrail_gct_v1 *)pGCT)->panel[bpi].Panel_Port_Control;
+ dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
+ ((struct oaktrail_gct_v1 *)pGCT)->panel[bpi].Panel_MIPI_Display_Descriptor;
+ break;
+ case 1:
+ vbt->oaktrail_gct = ioremap(addr + sizeof(*vbt) - 4,
+ vbt->size - sizeof(*vbt) + 4);
+ pGCT = vbt->oaktrail_gct;
+ bpi = ((struct oaktrail_gct_v2 *)pGCT)->PD.BootPanelIndex;
+ dev_priv->gct_data.bpi = bpi;
+ dev_priv->gct_data.pt =
+ ((struct oaktrail_gct_v2 *)pGCT)->PD.PanelType;
+ memcpy(&dev_priv->gct_data.DTD,
+ &((struct oaktrail_gct_v2 *)pGCT)->panel[bpi].DTD,
+ sizeof(struct oaktrail_timing_info));
+ dev_priv->gct_data.Panel_Port_Control =
+ ((struct oaktrail_gct_v2 *)pGCT)->panel[bpi].Panel_Port_Control;
+ dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
+ ((struct oaktrail_gct_v2 *)pGCT)->panel[bpi].Panel_MIPI_Display_Descriptor;
+ break;
+ case 0x10:
+ /*header definition changed from rev 01 (v2) to rev 10h. */
+ /*so, some values have changed location*/
+ new_size = vbt->checksum; /*checksum contains lo size byte*/
+ /*LSB of oaktrail_gct contains hi size byte*/
+ new_size |= ((0xff & (unsigned int)vbt->oaktrail_gct)) << 8;
+
+ vbt->checksum = vbt->size; /*size contains the checksum*/
+ if (new_size > 0xff)
+ vbt->size = 0xff; /*restrict size to 255*/
+ else
+ vbt->size = new_size;
+
+ /* number of descriptors defined in the GCT */
+ number_desc = ((0xff00 & (unsigned int)vbt->oaktrail_gct)) >> 8;
+ bpi = ((0xff0000 & (unsigned int)vbt->oaktrail_gct)) >> 16;
+ vbt->oaktrail_gct = ioremap(addr + GCT_R10_HEADER_SIZE,
+ GCT_R10_DISPLAY_DESC_SIZE * number_desc);
+ pGCT = vbt->oaktrail_gct;
+ pGCT = (u8 *)pGCT + (bpi*GCT_R10_DISPLAY_DESC_SIZE);
+ dev_priv->gct_data.bpi = bpi; /*save boot panel id*/
+
+ /*copy the GCT display timings into a temp structure*/
+ memcpy(&ti, pGCT, sizeof(struct gct_r10_timing_info));
+
+ /*now copy the temp struct into the dev_priv->gct_data*/
+ 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;
+
+ /* Move the MIPI_Display_Descriptor data from GCT to dev priv */
+ dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
+ *((u8 *)pGCT + 0x0d);
+ dev_priv->gct_data.Panel_MIPI_Display_Descriptor |=
+ (*((u8 *)pGCT + 0x0e)) << 8;
+ break;
+ default:
+ dev_err(dev->dev, "Unknown revision of GCT!\n");
+ vbt->size = 0;
+ }
+}
+
+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;
+}