drivers/gpu/drm/gma500/mid_bios.c

   1 /**************************************************************************
   2  * Copyright (c) 2011, Intel Corporation.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  **************************************************************************/
  19
  20 /* TODO
  21  * - Split functions by vbt type
  22  * - Make them all take drm_device
  23  * - Check ioremap failures
  24  */
  25
  26 #include <drm/drmP.h>
  27 #include <drm/drm.h>
  28 #include "gma_drm.h"
  29 #include "psb_drv.h"
  30 #include "mid_bios.h"
  31
  32 static void mid_get_fuse_settings(struct drm_device *dev)
  33 {
  34         struct drm_psb_private *dev_priv = dev->dev_private;
  35         struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
  36         uint32_t fuse_value = 0;
  37         uint32_t fuse_value_tmp = 0;
  38
  39 #define FB_REG06 0xD0810600
  40 #define FB_MIPI_DISABLE  (1 << 11)
  41 #define FB_REG09 0xD0810900
  42 #define FB_REG09 0xD0810900
  43 #define FB_SKU_MASK  0x7000
  44 #define FB_SKU_SHIFT 12
  45 #define FB_SKU_100 0
  46 #define FB_SKU_100L 1
  47 #define FB_SKU_83 2
  48         if (pci_root == NULL) {
  49                 WARN_ON(1);
  50                 return;
  51         }
  52
  53
  54         pci_write_config_dword(pci_root, 0xD0, FB_REG06);
  55         pci_read_config_dword(pci_root, 0xD4, &fuse_value);
  56
  57         /* FB_MIPI_DISABLE doesn't mean LVDS on with Medfield */
  58         if (IS_MRST(dev))
  59                 dev_priv->iLVDS_enable = fuse_value & FB_MIPI_DISABLE;
  60
  61         DRM_INFO("internal display is %s\n",
  62                  dev_priv->iLVDS_enable ? "LVDS display" : "MIPI display");
  63
  64          /* Prevent runtime suspend at start*/
  65          if (dev_priv->iLVDS_enable) {
  66                 dev_priv->is_lvds_on = true;
  67                 dev_priv->is_mipi_on = false;
  68         } else {
  69                 dev_priv->is_mipi_on = true;
  70                 dev_priv->is_lvds_on = false;
  71         }
  72
  73         dev_priv->video_device_fuse = fuse_value;
  74
  75         pci_write_config_dword(pci_root, 0xD0, FB_REG09);
  76         pci_read_config_dword(pci_root, 0xD4, &fuse_value);
  77
  78         dev_dbg(dev->dev, "SKU values is 0x%x.\n", fuse_value);
  79         fuse_value_tmp = (fuse_value & FB_SKU_MASK) >> FB_SKU_SHIFT;
  80
  81         dev_priv->fuse_reg_value = fuse_value;
  82
  83         switch (fuse_value_tmp) {
  84         case FB_SKU_100:
  85                 dev_priv->core_freq = 200;
  86                 break;
  87         case FB_SKU_100L:
  88                 dev_priv->core_freq = 100;
  89                 break;
  90         case FB_SKU_83:
  91                 dev_priv->core_freq = 166;
  92                 break;
  93         default:
  94                 dev_warn(dev->dev, "Invalid SKU values, SKU value = 0x%08x\n",
  95                                                                 fuse_value_tmp);
  96                 dev_priv->core_freq = 0;
  97         }
  98         dev_dbg(dev->dev, "LNC core clk is %dMHz.\n", dev_priv->core_freq);
  99         pci_dev_put(pci_root);
 100 }
 101
 102 /*
 103  *      Get the revison ID, B0:D2:F0;0x08
 104  */
 105 static void mid_get_pci_revID(struct drm_psb_private *dev_priv)
 106 {
 107         uint32_t platform_rev_id = 0;
 108         struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
 109
 110         if (pci_gfx_root == NULL) {
 111                 WARN_ON(1);
 112                 return;
 113         }
 114         pci_read_config_dword(pci_gfx_root, 0x08, &platform_rev_id);
 115         dev_priv->platform_rev_id = (uint8_t) platform_rev_id;
 116         pci_dev_put(pci_gfx_root);
 117         dev_dbg(dev_priv->dev->dev, "platform_rev_id is %x\n",
 118                                         dev_priv->platform_rev_id);
 119 }
 120
 121 static void mid_get_vbt_data(struct drm_psb_private *dev_priv)
 122 {
 123         struct drm_device *dev = dev_priv->dev;
 124         struct oaktrail_vbt *vbt = &dev_priv->vbt_data;
 125         u32 addr;
 126         u16 new_size;
 127         u8 *vbt_virtual;
 128         u8 bpi;
 129         u8 number_desc = 0;
 130         struct oaktrail_timing_info *dp_ti = &dev_priv->gct_data.DTD;
 131         struct gct_r10_timing_info ti;
 132         void *pGCT;
 133         struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
 134
 135         /* Get the address of the platform config vbt, B0:D2:F0;0xFC */
 136         pci_read_config_dword(pci_gfx_root, 0xFC, &addr);
 137         pci_dev_put(pci_gfx_root);
 138
 139         dev_dbg(dev->dev, "drm platform config address is %x\n", addr);
 140
 141         /* check for platform config address == 0. */
 142         /* this means fw doesn't support vbt */
 143
 144         if (addr == 0) {
 145                 vbt->size = 0;
 146                 return;
 147         }
 148
 149         /* get the virtual address of the vbt */
 150         vbt_virtual = ioremap(addr, sizeof(*vbt));
 151         if (vbt_virtual == NULL) {
 152                 vbt->size = 0;
 153                 return;
 154         }
 155
 156         memcpy(vbt, vbt_virtual, sizeof(*vbt));
 157         iounmap(vbt_virtual); /* Free virtual address space */
 158
 159         /* No matching signature don't process the data */
 160         if (memcmp(vbt->signature, "$GCT", 4)) {
 161                 vbt->size = 0;
 162                 return;
 163         }
 164
 165         dev_dbg(dev->dev, "GCT revision is %x\n", vbt->revision);
 166
 167         switch (vbt->revision) {
 168         case 0:
 169                 vbt->oaktrail_gct = ioremap(addr + sizeof(*vbt) - 4,
 170                                         vbt->size - sizeof(*vbt) + 4);
 171                 pGCT = vbt->oaktrail_gct;
 172                 bpi = ((struct oaktrail_gct_v1 *)pGCT)->PD.BootPanelIndex;
 173                 dev_priv->gct_data.bpi = bpi;
 174                 dev_priv->gct_data.pt =
 175                         ((struct oaktrail_gct_v1 *)pGCT)->PD.PanelType;
 176                 memcpy(&dev_priv->gct_data.DTD,
 177                         &((struct oaktrail_gct_v1 *)pGCT)->panel[bpi].DTD,
 178                                 sizeof(struct oaktrail_timing_info));
 179                 dev_priv->gct_data.Panel_Port_Control =
 180                   ((struct oaktrail_gct_v1 *)pGCT)->panel[bpi].Panel_Port_Control;
 181                 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
 182                         ((struct oaktrail_gct_v1 *)pGCT)->panel[bpi].Panel_MIPI_Display_Descriptor;
 183                 break;
 184         case 1:
 185                 vbt->oaktrail_gct = ioremap(addr + sizeof(*vbt) - 4,
 186                                         vbt->size - sizeof(*vbt) + 4);
 187                 pGCT = vbt->oaktrail_gct;
 188                 bpi = ((struct oaktrail_gct_v2 *)pGCT)->PD.BootPanelIndex;
 189                 dev_priv->gct_data.bpi = bpi;
 190                 dev_priv->gct_data.pt =
 191                         ((struct oaktrail_gct_v2 *)pGCT)->PD.PanelType;
 192                 memcpy(&dev_priv->gct_data.DTD,
 193                         &((struct oaktrail_gct_v2 *)pGCT)->panel[bpi].DTD,
 194                                 sizeof(struct oaktrail_timing_info));
 195                 dev_priv->gct_data.Panel_Port_Control =
 196                   ((struct oaktrail_gct_v2 *)pGCT)->panel[bpi].Panel_Port_Control;
 197                 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
 198                         ((struct oaktrail_gct_v2 *)pGCT)->panel[bpi].Panel_MIPI_Display_Descriptor;
 199                 break;
 200         case 0x10:
 201                 /*header definition changed from rev 01 (v2) to rev 10h. */
 202                 /*so, some values have changed location*/
 203                 new_size = vbt->checksum; /*checksum contains lo size byte*/
 204                 /*LSB of oaktrail_gct contains hi size byte*/
 205                 new_size |= ((0xff & (unsigned int)(long)vbt->oaktrail_gct)) << 8;
 206
 207                 vbt->checksum = vbt->size; /*size contains the checksum*/
 208                 if (new_size > 0xff)
 209                         vbt->size = 0xff; /*restrict size to 255*/
 210                 else
 211                         vbt->size = new_size;
 212
 213                 /* number of descriptors defined in the GCT */
 214                 number_desc = ((0xff00 & (unsigned int)(long)vbt->oaktrail_gct)) >> 8;
 215                 bpi = ((0xff0000 & (unsigned int)(long)vbt->oaktrail_gct)) >> 16;
 216                 vbt->oaktrail_gct = ioremap(addr + GCT_R10_HEADER_SIZE,
 217                                 GCT_R10_DISPLAY_DESC_SIZE * number_desc);
 218                 pGCT = vbt->oaktrail_gct;
 219                 pGCT = (u8 *)pGCT + (bpi*GCT_R10_DISPLAY_DESC_SIZE);
 220                 dev_priv->gct_data.bpi = bpi; /*save boot panel id*/
 221
 222                 /*copy the GCT display timings into a temp structure*/
 223                 memcpy(&ti, pGCT, sizeof(struct gct_r10_timing_info));
 224
 225                 /*now copy the temp struct into the dev_priv->gct_data*/
 226                 dp_ti->pixel_clock = ti.pixel_clock;
 227                 dp_ti->hactive_hi = ti.hactive_hi;
 228                 dp_ti->hactive_lo = ti.hactive_lo;
 229                 dp_ti->hblank_hi = ti.hblank_hi;
 230                 dp_ti->hblank_lo = ti.hblank_lo;
 231                 dp_ti->hsync_offset_hi = ti.hsync_offset_hi;
 232                 dp_ti->hsync_offset_lo = ti.hsync_offset_lo;
 233                 dp_ti->hsync_pulse_width_hi = ti.hsync_pulse_width_hi;
 234                 dp_ti->hsync_pulse_width_lo = ti.hsync_pulse_width_lo;
 235                 dp_ti->vactive_hi = ti.vactive_hi;
 236                 dp_ti->vactive_lo = ti.vactive_lo;
 237                 dp_ti->vblank_hi = ti.vblank_hi;
 238                 dp_ti->vblank_lo = ti.vblank_lo;
 239                 dp_ti->vsync_offset_hi = ti.vsync_offset_hi;
 240                 dp_ti->vsync_offset_lo = ti.vsync_offset_lo;
 241                 dp_ti->vsync_pulse_width_hi = ti.vsync_pulse_width_hi;
 242                 dp_ti->vsync_pulse_width_lo = ti.vsync_pulse_width_lo;
 243
 244                 /* Move the MIPI_Display_Descriptor data from GCT to dev priv */
 245                 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
 246                                                         *((u8 *)pGCT + 0x0d);
 247                 dev_priv->gct_data.Panel_MIPI_Display_Descriptor |=
 248                                                 (*((u8 *)pGCT + 0x0e)) << 8;
 249                 break;
 250         default:
 251                 dev_err(dev->dev, "Unknown revision of GCT!\n");
 252                 vbt->size = 0;
 253         }
 254 }
 255
 256 int mid_chip_setup(struct drm_device *dev)
 257 {
 258         struct drm_psb_private *dev_priv = dev->dev_private;
 259         mid_get_fuse_settings(dev);
 260         mid_get_vbt_data(dev_priv);
 261         mid_get_pci_revID(dev_priv);
 262         return 0;
 263 }