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  1. /*
  2.  * Copyright 2008 Intel Corporation <hong.liu@intel.com>
  3.  * Copyright 2008 Red Hat <mjg@redhat.com>
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining
  6.  * a copy of this software and associated documentation files (the
  7.  * "Software"), to deal in the Software without restriction, including
  8.  * without limitation the rights to use, copy, modify, merge, publish,
  9.  * distribute, sub license, and/or sell copies of the Software, and to
  10.  * permit persons to whom the Software is furnished to do so, subject to
  11.  * the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice (including the
  14.  * next paragraph) shall be included in all copies or substantial
  15.  * portions of the Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18.  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20.  * NON-INFRINGEMENT.  IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
  21.  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  22.  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23.  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24.  * SOFTWARE.
  25.  *
  26.  */
  27.  
  28. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  29.  
  30. //#include <linux/acpi.h>
  31. //#include <linux/acpi_io.h>
  32. //#include <acpi/video.h>
  33. #include <linux/errno.h>
  34.  
  35.  
  36. #include <drm/drmP.h>
  37. #include <drm/i915_drm.h>
  38. #include "i915_drv.h"
  39. #include "intel_drv.h"
  40.  
  41. #define PCI_ASLE 0xe4
  42. #define PCI_ASLS 0xfc
  43.  
  44. #define OPREGION_HEADER_OFFSET 0
  45. #define OPREGION_ACPI_OFFSET   0x100
  46. #define   ACPI_CLID 0x01ac /* current lid state indicator */
  47. #define   ACPI_CDCK 0x01b0 /* current docking state indicator */
  48. #define OPREGION_SWSCI_OFFSET  0x200
  49. #define OPREGION_ASLE_OFFSET   0x300
  50. #define OPREGION_VBT_OFFSET    0x400
  51.  
  52. #define OPREGION_SIGNATURE "IntelGraphicsMem"
  53. #define MBOX_ACPI      (1<<0)
  54. #define MBOX_SWSCI     (1<<1)
  55. #define MBOX_ASLE      (1<<2)
  56.  
  57. struct opregion_header {
  58.        u8 signature[16];
  59.        u32 size;
  60.        u32 opregion_ver;
  61.        u8 bios_ver[32];
  62.        u8 vbios_ver[16];
  63.        u8 driver_ver[16];
  64.        u32 mboxes;
  65.        u8 reserved[164];
  66. } __attribute__((packed));
  67.  
  68. /* OpRegion mailbox #1: public ACPI methods */
  69. struct opregion_acpi {
  70.        u32 drdy;       /* driver readiness */
  71.        u32 csts;       /* notification status */
  72.        u32 cevt;       /* current event */
  73.        u8 rsvd1[20];
  74.        u32 didl[8];    /* supported display devices ID list */
  75.        u32 cpdl[8];    /* currently presented display list */
  76.        u32 cadl[8];    /* currently active display list */
  77.        u32 nadl[8];    /* next active devices list */
  78.        u32 aslp;       /* ASL sleep time-out */
  79.        u32 tidx;       /* toggle table index */
  80.        u32 chpd;       /* current hotplug enable indicator */
  81.        u32 clid;       /* current lid state*/
  82.        u32 cdck;       /* current docking state */
  83.        u32 sxsw;       /* Sx state resume */
  84.        u32 evts;       /* ASL supported events */
  85.        u32 cnot;       /* current OS notification */
  86.        u32 nrdy;       /* driver status */
  87.        u8 rsvd2[60];
  88. } __attribute__((packed));
  89.  
  90. /* OpRegion mailbox #2: SWSCI */
  91. struct opregion_swsci {
  92.        u32 scic;       /* SWSCI command|status|data */
  93.        u32 parm;       /* command parameters */
  94.        u32 dslp;       /* driver sleep time-out */
  95.        u8 rsvd[244];
  96. } __attribute__((packed));
  97.  
  98. /* OpRegion mailbox #3: ASLE */
  99. struct opregion_asle {
  100.        u32 ardy;       /* driver readiness */
  101.        u32 aslc;       /* ASLE interrupt command */
  102.        u32 tche;       /* technology enabled indicator */
  103.        u32 alsi;       /* current ALS illuminance reading */
  104.        u32 bclp;       /* backlight brightness to set */
  105.        u32 pfit;       /* panel fitting state */
  106.        u32 cblv;       /* current brightness level */
  107.        u16 bclm[20];   /* backlight level duty cycle mapping table */
  108.        u32 cpfm;       /* current panel fitting mode */
  109.        u32 epfm;       /* enabled panel fitting modes */
  110.        u8 plut[74];    /* panel LUT and identifier */
  111.        u32 pfmb;       /* PWM freq and min brightness */
  112.        u8 rsvd[102];
  113. } __attribute__((packed));
  114.  
  115. /* Driver readiness indicator */
  116. #define ASLE_ARDY_READY         (1 << 0)
  117. #define ASLE_ARDY_NOT_READY     (0 << 0)
  118.  
  119. /* ASLE irq request bits */
  120. #define ASLE_SET_ALS_ILLUM     (1 << 0)
  121. #define ASLE_SET_BACKLIGHT     (1 << 1)
  122. #define ASLE_SET_PFIT          (1 << 2)
  123. #define ASLE_SET_PWM_FREQ      (1 << 3)
  124. #define ASLE_REQ_MSK           0xf
  125.  
  126. /* response bits of ASLE irq request */
  127. #define ASLE_ALS_ILLUM_FAILED   (1<<10)
  128. #define ASLE_BACKLIGHT_FAILED   (1<<12)
  129. #define ASLE_PFIT_FAILED        (1<<14)
  130. #define ASLE_PWM_FREQ_FAILED    (1<<16)
  131.  
  132. /* Technology enabled indicator */
  133. #define ASLE_TCHE_ALS_EN        (1 << 0)
  134. #define ASLE_TCHE_BLC_EN        (1 << 1)
  135. #define ASLE_TCHE_PFIT_EN       (1 << 2)
  136. #define ASLE_TCHE_PFMB_EN       (1 << 3)
  137.  
  138. /* ASLE backlight brightness to set */
  139. #define ASLE_BCLP_VALID                (1<<31)
  140. #define ASLE_BCLP_MSK          (~(1<<31))
  141.  
  142. /* ASLE panel fitting request */
  143. #define ASLE_PFIT_VALID         (1<<31)
  144. #define ASLE_PFIT_CENTER (1<<0)
  145. #define ASLE_PFIT_STRETCH_TEXT (1<<1)
  146. #define ASLE_PFIT_STRETCH_GFX (1<<2)
  147.  
  148. /* PWM frequency and minimum brightness */
  149. #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
  150. #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
  151. #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
  152. #define ASLE_PFMB_PWM_VALID (1<<31)
  153.  
  154. #define ASLE_CBLV_VALID         (1<<31)
  155.  
  156. #define ACPI_OTHER_OUTPUT (0<<8)
  157. #define ACPI_VGA_OUTPUT (1<<8)
  158. #define ACPI_TV_OUTPUT (2<<8)
  159. #define ACPI_DIGITAL_OUTPUT (3<<8)
  160. #define ACPI_LVDS_OUTPUT (4<<8)
  161.  
  162. #ifdef CONFIG_ACPI
  163. #endif
  164.  
  165. int intel_opregion_setup(struct drm_device *dev)
  166. {
  167.         struct drm_i915_private *dev_priv = dev->dev_private;
  168.         struct intel_opregion *opregion = &dev_priv->opregion;
  169.         void __iomem *base;
  170.         u32 asls, mboxes;
  171.         char buf[sizeof(OPREGION_SIGNATURE)];
  172.         int err = 0;
  173.  
  174.         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
  175.         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
  176.         if (asls == 0) {
  177.                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
  178.                 return -ENOTSUPP;
  179.         }
  180.  
  181.     base = ioremap(asls, OPREGION_SIZE);
  182.         if (!base)
  183.                 return -ENOMEM;
  184.  
  185.         memcpy(buf, base, sizeof(buf));
  186.  
  187.         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
  188.                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
  189.                 err = -EINVAL;
  190.                 goto err_out;
  191.         }
  192.         opregion->header = base;
  193.         opregion->vbt = base + OPREGION_VBT_OFFSET;
  194.  
  195.         opregion->lid_state = base + ACPI_CLID;
  196.  
  197.         mboxes = ioread32(&opregion->header->mboxes);
  198.         if (mboxes & MBOX_ACPI) {
  199.                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
  200.                 opregion->acpi = base + OPREGION_ACPI_OFFSET;
  201.         }
  202.  
  203.         if (mboxes & MBOX_SWSCI) {
  204.                 DRM_DEBUG_DRIVER("SWSCI supported\n");
  205.                 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
  206.         }
  207.         if (mboxes & MBOX_ASLE) {
  208.                 DRM_DEBUG_DRIVER("ASLE supported\n");
  209.                 opregion->asle = base + OPREGION_ASLE_OFFSET;
  210.  
  211.                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
  212.         }
  213.  
  214.         return 0;
  215.  
  216. err_out:
  217.         iounmap(base);
  218.         return err;
  219. }
  220.