#include "i915_drv.h"
#include "intel_drv.h"
-#define PCI_ASLE 0xe4
-#define PCI_ASLS 0xfc
+#define PCI_ASLE 0xe4
+#define PCI_ASLS 0xfc
+#define PCI_SWSCI 0xe8
+#define PCI_SWSCI_SCISEL (1 << 15)
+#define PCI_SWSCI_GSSCIE (1 << 0)
#define OPREGION_HEADER_OFFSET 0
#define OPREGION_ACPI_OFFSET 0x100
#define ASLE_CBLV_VALID (1<<31)
+/* Software System Control Interrupt (SWSCI) */
+#define SWSCI_SCIC_INDICATOR (1 << 0)
+#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
+#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
+#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
+#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
+#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
+#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
+#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
+#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
+#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
+
+#define SWSCI_FUNCTION_CODE(main, sub) \
+ ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
+ (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
+
+/* SWSCI: Get BIOS Data (GBDA) */
+#define SWSCI_GBDA 4
+#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
+#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
+#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
+#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
+#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
+#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
+#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
+
+/* SWSCI: System BIOS Callbacks (SBCB) */
+#define SWSCI_SBCB 6
+#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
+#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
+#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
+#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
+#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
+#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
+#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
+#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
+#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
+#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
+#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
+#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
+#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
+#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
+#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
+#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
+
#define ACPI_OTHER_OUTPUT (0<<8)
#define ACPI_VGA_OUTPUT (1<<8)
#define ACPI_TV_OUTPUT (2<<8)
#define ACPI_LVDS_OUTPUT (4<<8)
#ifdef CONFIG_ACPI
+static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
+ u32 main_function, sub_function, scic;
+ u16 pci_swsci;
+ u32 dslp;
+
+ if (!swsci)
+ return -ENODEV;
+
+ main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
+ SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
+ sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
+ SWSCI_SCIC_SUB_FUNCTION_SHIFT;
+
+ /* Check if we can call the function. See swsci_setup for details. */
+ if (main_function == SWSCI_SBCB) {
+ if ((dev_priv->opregion.swsci_sbcb_sub_functions &
+ (1 << sub_function)) == 0)
+ return -EINVAL;
+ } else if (main_function == SWSCI_GBDA) {
+ if ((dev_priv->opregion.swsci_gbda_sub_functions &
+ (1 << sub_function)) == 0)
+ return -EINVAL;
+ }
+
+ /* Driver sleep timeout in ms. */
+ dslp = ioread32(&swsci->dslp);
+ if (!dslp) {
+ dslp = 2;
+ } else if (dslp > 500) {
+ /* Hey bios, trust must be earned. */
+ WARN_ONCE(1, "excessive driver sleep timeout (DSPL) %u\n", dslp);
+ dslp = 500;
+ }
+
+ /* The spec tells us to do this, but we are the only user... */
+ scic = ioread32(&swsci->scic);
+ if (scic & SWSCI_SCIC_INDICATOR) {
+ DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
+ return -EBUSY;
+ }
+
+ scic = function | SWSCI_SCIC_INDICATOR;
+
+ iowrite32(parm, &swsci->parm);
+ iowrite32(scic, &swsci->scic);
+
+ /* Ensure SCI event is selected and event trigger is cleared. */
+ pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
+ if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
+ pci_swsci |= PCI_SWSCI_SCISEL;
+ pci_swsci &= ~PCI_SWSCI_GSSCIE;
+ pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
+ }
+
+ /* Use event trigger to tell bios to check the mail. */
+ pci_swsci |= PCI_SWSCI_GSSCIE;
+ pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
+
+ /* Poll for the result. */
+#define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
+ if (wait_for(C, dslp)) {
+ DRM_DEBUG_DRIVER("SWSCI request timed out\n");
+ return -ETIMEDOUT;
+ }
+
+ scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
+ SWSCI_SCIC_EXIT_STATUS_SHIFT;
+
+ /* Note: scic == 0 is an error! */
+ if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
+ DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
+ return -EIO;
+ }
+
+ if (parm_out)
+ *parm_out = ioread32(&swsci->parm);
+
+ return 0;
+
+#undef C
+}
+
static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
{
struct drm_i915_private *dev_priv = dev->dev_private;
opregion->asle = NULL;
opregion->vbt = NULL;
}
-#endif
+
+static void swsci_setup(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_opregion *opregion = &dev_priv->opregion;
+ bool requested_callbacks = false;
+ u32 tmp;
+
+ /* Sub-function code 0 is okay, let's allow them. */
+ opregion->swsci_gbda_sub_functions = 1;
+ opregion->swsci_sbcb_sub_functions = 1;
+
+ /* We use GBDA to ask for supported GBDA calls. */
+ if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
+ /* make the bits match the sub-function codes */
+ tmp <<= 1;
+ opregion->swsci_gbda_sub_functions |= tmp;
+ }
+
+ /*
+ * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
+ * must not call interfaces that are not specifically requested by the
+ * bios.
+ */
+ if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
+ /* here, the bits already match sub-function codes */
+ opregion->swsci_sbcb_sub_functions |= tmp;
+ requested_callbacks = true;
+ }
+
+ /*
+ * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
+ * the callback is _requested_. But we still can't call interfaces that
+ * are not requested.
+ */
+ if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
+ /* make the bits match the sub-function codes */
+ u32 low = tmp & 0x7ff;
+ u32 high = tmp & ~0xfff; /* bit 11 is reserved */
+ tmp = (high << 4) | (low << 1) | 1;
+
+ /* best guess what to do with supported wrt requested */
+ if (requested_callbacks) {
+ u32 req = opregion->swsci_sbcb_sub_functions;
+ if ((req & tmp) != req)
+ DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
+ /* XXX: for now, trust the requested callbacks */
+ /* opregion->swsci_sbcb_sub_functions &= tmp; */
+ } else {
+ opregion->swsci_sbcb_sub_functions |= tmp;
+ }
+ }
+
+ DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
+ opregion->swsci_gbda_sub_functions,
+ opregion->swsci_sbcb_sub_functions);
+}
+#else /* CONFIG_ACPI */
+static inline void swsci_setup(struct drm_device *dev) {}
+#endif /* CONFIG_ACPI */
int intel_opregion_setup(struct drm_device *dev)
{
if (mboxes & MBOX_SWSCI) {
DRM_DEBUG_DRIVER("SWSCI supported\n");
opregion->swsci = base + OPREGION_SWSCI_OFFSET;
+ swsci_setup(dev);
}
if (mboxes & MBOX_ASLE) {
DRM_DEBUG_DRIVER("ASLE supported\n");
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