drivers/staging/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 <linux/moduleparam.h>
  27 #include <drm/drmP.h>
  28 #include <drm/drm.h>
  29 #include "psb_drm.h"
  30 #include "psb_drv.h"
  31 #include "mid_bios.h"
  32 #include "mdfld_output.h"
  33
  34 static int panel_id = GCT_DETECT;
  35 module_param_named(panel_id, panel_id, int, 0600);
  36 MODULE_PARM_DESC(panel_id, "Panel Identifier");
  37
  38
  39 static void mid_get_fuse_settings(struct drm_device *dev)
  40 {
  41         struct drm_psb_private *dev_priv = dev->dev_private;
  42         struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
  43         uint32_t fuse_value = 0;
  44         uint32_t fuse_value_tmp = 0;
  45
  46 #define FB_REG06 0xD0810600
  47 #define FB_MIPI_DISABLE  (1 << 11)
  48 #define FB_REG09 0xD0810900
  49 #define FB_REG09 0xD0810900
  50 #define FB_SKU_MASK  0x7000
  51 #define FB_SKU_SHIFT 12
  52 #define FB_SKU_100 0
  53 #define FB_SKU_100L 1
  54 #define FB_SKU_83 2
  55         pci_write_config_dword(pci_root, 0xD0, FB_REG06);
  56         pci_read_config_dword(pci_root, 0xD4, &fuse_value);
  57
  58         /* FB_MIPI_DISABLE doesn't mean LVDS on with Medfield */
  59         if (IS_MRST(dev))
  60                 dev_priv->iLVDS_enable = fuse_value & FB_MIPI_DISABLE;
  61
  62         DRM_INFO("internal display is %s\n",
  63                  dev_priv->iLVDS_enable ? "LVDS display" : "MIPI display");
  64
  65          /* Prevent runtime suspend at start*/
  66          if (dev_priv->iLVDS_enable) {
  67                 dev_priv->is_lvds_on = true;
  68                 dev_priv->is_mipi_on = false;
  69         } else {
  70                 dev_priv->is_mipi_on = true;
  71                 dev_priv->is_lvds_on = false;
  72         }
  73
  74         dev_priv->video_device_fuse = fuse_value;
  75
  76         pci_write_config_dword(pci_root, 0xD0, FB_REG09);
  77         pci_read_config_dword(pci_root, 0xD4, &fuse_value);
  78
  79         dev_dbg(dev->dev, "SKU values is 0x%x.\n", fuse_value);
  80         fuse_value_tmp = (fuse_value & FB_SKU_MASK) >> FB_SKU_SHIFT;
  81
  82         dev_priv->fuse_reg_value = fuse_value;
  83
  84         switch (fuse_value_tmp) {
  85         case FB_SKU_100:
  86                 dev_priv->core_freq = 200;
  87                 break;
  88         case FB_SKU_100L:
  89                 dev_priv->core_freq = 100;
  90                 break;
  91         case FB_SKU_83:
  92                 dev_priv->core_freq = 166;
  93                 break;
  94         default:
  95                 dev_warn(dev->dev, "Invalid SKU values, SKU value = 0x%08x\n",
  96                                                                 fuse_value_tmp);
  97                 dev_priv->core_freq = 0;
  98         }
  99         dev_dbg(dev->dev, "LNC core clk is %dMHz.\n", dev_priv->core_freq);
 100         pci_dev_put(pci_root);
 101 }
 102
 103 /*
 104  *      Get the revison ID, B0:D2:F0;0x08
 105  */
 106 static void mid_get_pci_revID(struct drm_psb_private *dev_priv)
 107 {
 108         uint32_t platform_rev_id = 0;
 109         struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
 110
 111         pci_read_config_dword(pci_gfx_root, 0x08, &platform_rev_id);
 112         dev_priv->platform_rev_id = (uint8_t) platform_rev_id;
 113         pci_dev_put(pci_gfx_root);
 114         dev_dbg(dev_priv->dev->dev, "platform_rev_id is %x\n",
 115                                         dev_priv->platform_rev_id);
 116 }
 117
 118 static void mid_get_vbt_data(struct drm_psb_private *dev_priv)
 119 {
 120         struct drm_device *dev = dev_priv->dev;
 121         struct mrst_vbt *vbt = &dev_priv->vbt_data;
 122         u32 addr;
 123         u16 new_size;
 124         u8 *vbt_virtual;
 125         u8 bpi;
 126         u8 number_desc = 0;
 127         struct mrst_timing_info *dp_ti = &dev_priv->gct_data.DTD;
 128         struct gct_r10_timing_info ti;
 129         void *pGCT;
 130         struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
 131
 132         /* Get the address of the platform config vbt, B0:D2:F0;0xFC */
 133         pci_read_config_dword(pci_gfx_root, 0xFC, &addr);
 134         pci_dev_put(pci_gfx_root);
 135
 136         dev_dbg(dev->dev, "drm platform config address is %x\n", addr);
 137
 138         /* check for platform config address == 0. */
 139         /* this means fw doesn't support vbt */
 140
 141         if (addr == 0) {
 142                 vbt->size = 0;
 143                 return;
 144         }
 145
 146         /* get the virtual address of the vbt */
 147         vbt_virtual = ioremap(addr, sizeof(*vbt));
 148
 149         memcpy(vbt, vbt_virtual, sizeof(*vbt));
 150         iounmap(vbt_virtual); /* Free virtual address space */
 151
 152         dev_dbg(dev->dev, "GCT revision is %x\n", vbt->revision);
 153
 154         switch (vbt->revision) {
 155         case 0:
 156                 vbt->mrst_gct = ioremap(addr + sizeof(*vbt) - 4,
 157                                         vbt->size - sizeof(*vbt) + 4);
 158                 pGCT = vbt->mrst_gct;
 159                 bpi = ((struct mrst_gct_v1 *)pGCT)->PD.BootPanelIndex;
 160                 dev_priv->gct_data.bpi = bpi;
 161                 dev_priv->gct_data.pt =
 162                         ((struct mrst_gct_v1 *)pGCT)->PD.PanelType;
 163                 memcpy(&dev_priv->gct_data.DTD,
 164                         &((struct mrst_gct_v1 *)pGCT)->panel[bpi].DTD,
 165                                 sizeof(struct mrst_timing_info));
 166                 dev_priv->gct_data.Panel_Port_Control =
 167                   ((struct mrst_gct_v1 *)pGCT)->panel[bpi].Panel_Port_Control;
 168                 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
 169                         ((struct mrst_gct_v1 *)pGCT)->panel[bpi].Panel_MIPI_Display_Descriptor;
 170                 break;
 171         case 1:
 172                 vbt->mrst_gct = ioremap(addr + sizeof(*vbt) - 4,
 173                                         vbt->size - sizeof(*vbt) + 4);
 174                 pGCT = vbt->mrst_gct;
 175                 bpi = ((struct mrst_gct_v2 *)pGCT)->PD.BootPanelIndex;
 176                 dev_priv->gct_data.bpi = bpi;
 177                 dev_priv->gct_data.pt =
 178                         ((struct mrst_gct_v2 *)pGCT)->PD.PanelType;
 179                 memcpy(&dev_priv->gct_data.DTD,
 180                         &((struct mrst_gct_v2 *)pGCT)->panel[bpi].DTD,
 181                                 sizeof(struct mrst_timing_info));
 182                 dev_priv->gct_data.Panel_Port_Control =
 183                   ((struct mrst_gct_v2 *)pGCT)->panel[bpi].Panel_Port_Control;
 184                 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
 185                         ((struct mrst_gct_v2 *)pGCT)->panel[bpi].Panel_MIPI_Display_Descriptor;
 186                 break;
 187         case 0x10:
 188                 /*header definition changed from rev 01 (v2) to rev 10h. */
 189                 /*so, some values have changed location*/
 190                 new_size = vbt->checksum; /*checksum contains lo size byte*/
 191                 /*LSB of mrst_gct contains hi size byte*/
 192                 new_size |= ((0xff & (unsigned int)vbt->mrst_gct)) << 8;
 193
 194                 vbt->checksum = vbt->size; /*size contains the checksum*/
 195                 if (new_size > 0xff)
 196                         vbt->size = 0xff; /*restrict size to 255*/
 197                 else
 198                         vbt->size = new_size;
 199
 200                 /* number of descriptors defined in the GCT */
 201                 number_desc = ((0xff00 & (unsigned int)vbt->mrst_gct)) >> 8;
 202                 bpi = ((0xff0000 & (unsigned int)vbt->mrst_gct)) >> 16;
 203                 vbt->mrst_gct = ioremap(addr + GCT_R10_HEADER_SIZE,
 204                                 GCT_R10_DISPLAY_DESC_SIZE * number_desc);
 205                 pGCT = vbt->mrst_gct;
 206                 pGCT = (u8 *)pGCT + (bpi*GCT_R10_DISPLAY_DESC_SIZE);
 207                 dev_priv->gct_data.bpi = bpi; /*save boot panel id*/
 208
 209                 /*copy the GCT display timings into a temp structure*/
 210                 memcpy(&ti, pGCT, sizeof(struct gct_r10_timing_info));
 211
 212                 /*now copy the temp struct into the dev_priv->gct_data*/
 213                 dp_ti->pixel_clock = ti.pixel_clock;
 214                 dp_ti->hactive_hi = ti.hactive_hi;
 215                 dp_ti->hactive_lo = ti.hactive_lo;
 216                 dp_ti->hblank_hi = ti.hblank_hi;
 217                 dp_ti->hblank_lo = ti.hblank_lo;
 218                 dp_ti->hsync_offset_hi = ti.hsync_offset_hi;
 219                 dp_ti->hsync_offset_lo = ti.hsync_offset_lo;
 220                 dp_ti->hsync_pulse_width_hi = ti.hsync_pulse_width_hi;
 221                 dp_ti->hsync_pulse_width_lo = ti.hsync_pulse_width_lo;
 222                 dp_ti->vactive_hi = ti.vactive_hi;
 223                 dp_ti->vactive_lo = ti.vactive_lo;
 224                 dp_ti->vblank_hi = ti.vblank_hi;
 225                 dp_ti->vblank_lo = ti.vblank_lo;
 226                 dp_ti->vsync_offset_hi = ti.vsync_offset_hi;
 227                 dp_ti->vsync_offset_lo = ti.vsync_offset_lo;
 228                 dp_ti->vsync_pulse_width_hi = ti.vsync_pulse_width_hi;
 229                 dp_ti->vsync_pulse_width_lo = ti.vsync_pulse_width_lo;
 230
 231                 /* Move the MIPI_Display_Descriptor data from GCT to dev priv */
 232                 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
 233                                                         *((u8 *)pGCT + 0x0d);
 234                 dev_priv->gct_data.Panel_MIPI_Display_Descriptor |=
 235                                                 (*((u8 *)pGCT + 0x0e)) << 8;
 236                 break;
 237         default:
 238                 dev_err(dev->dev, "Unknown revision of GCT!\n");
 239                 vbt->size = 0;
 240         }
 241         if (IS_MFLD(dev_priv->dev)) {
 242                 if (panel_id == GCT_DETECT) {
 243                         if (dev_priv->gct_data.bpi == 2) {
 244                                 dev_info(dev->dev, "[GFX] PYR Panel Detected\n");
 245                                 dev_priv->panel_id = PYR_CMD;
 246                                 panel_id = PYR_CMD;
 247                         } else if (dev_priv->gct_data.bpi == 0) {
 248                                 dev_info(dev->dev, "[GFX] TMD Panel Detected.\n");
 249                                 dev_priv->panel_id = TMD_VID;
 250                                 panel_id = TMD_VID;
 251                         } else {
 252                                 dev_info(dev->dev, "[GFX] Default Panel (TPO)\n");
 253                                 dev_priv->panel_id = TPO_CMD;
 254                                 panel_id = TPO_CMD;
 255                         }
 256                 } else {
 257                         dev_info(dev->dev, "[GFX] Panel Parameter Passed in through cmd line\n");
 258                         dev_priv->panel_id = panel_id;
 259                 }
 260         }
 261 }
 262
 263 int mid_chip_setup(struct drm_device *dev)
 264 {
 265         struct drm_psb_private *dev_priv = dev->dev_private;
 266         mid_get_fuse_settings(dev);
 267         mid_get_vbt_data(dev_priv);
 268         mid_get_pci_revID(dev_priv);
 269         return 0;
 270 }