x86: Add initial video device init for Intel GMA

Intel's Graphics Media Accelerator (GMA) is a generic name for a wide range
of video devices. Add code to set up the hardware on ivybridge. Part of the
init happens in native code, part of it happens in a 16-bit option ROM for
those nostalgic for the 1970s.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 156 insertions, 0 deletions

diff --git a/arch/x86/cpu/ivybridge/gma.h b/arch/x86/cpu/ivybridge/gma.h
new file mode 100644
index 0000000..e7ec649
--- /dev/null
+++ b/arch/x86/cpu/ivybridge/gma.h
@@ -0,0 +1,156 @@
+/*
+ * From Coreboot file of the same name
+ *
+ * Copyright (C) 2012 Chromium OS Authors
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+/* mailbox 0: header */
+__packed struct opregion_header {
+	u8	signature[16];
+	u32	size;
+	u32	version;
+	u8	sbios_version[32];
+	u8	vbios_version[16];
+	u8	driver_version[16];
+	u32	mailboxes;
+	u8	reserved[164];
+};
+
+#define IGD_OPREGION_SIGNATURE "IntelGraphicsMem"
+#define IGD_OPREGION_VERSION  2
+
+#define IGD_MBOX1	(1 << 0)
+#define IGD_MBOX2	(1 << 1)
+#define IGD_MBOX3	(1 << 2)
+#define IGD_MBOX4	(1 << 3)
+#define IGD_MBOX5	(1 << 4)
+
+#define MAILBOXES_MOBILE  (IGD_MBOX1 | IGD_MBOX2 | IGD_MBOX3 | \
+			   IGD_MBOX4 | IGD_MBOX5)
+#define MAILBOXES_DESKTOP (IGD_MBOX2 | IGD_MBOX4)
+
+#define SBIOS_VERSION_SIZE 32
+
+/* mailbox 1: public acpi methods */
+__packed struct opregion_mailbox1 {
+	u32	drdy;
+	u32	csts;
+	u32	cevt;
+	u8	reserved1[20];
+	u32	didl[8];
+	u32	cpdl[8];
+	u32	cadl[8];
+	u32	nadl[8];
+	u32	aslp;
+	u32	tidx;
+	u32	chpd;
+	u32	clid;
+	u32	cdck;
+	u32	sxsw;
+	u32	evts;
+	u32	cnot;
+	u32	nrdy;
+	u8	reserved2[60];
+};
+
+/* mailbox 2: software sci interface */
+__packed struct opregion_mailbox2 {
+	u32	scic;
+	u32	parm;
+	u32	dslp;
+	u8	reserved[244];
+};
+
+/* mailbox 3: power conservation */
+__packed struct opregion_mailbox3 {
+	u32	ardy;
+	u32	aslc;
+	u32	tche;
+	u32	alsi;
+	u32	bclp;
+	u32	pfit;
+	u32	cblv;
+	u16	bclm[20];
+	u32	cpfm;
+	u32	epfm;
+	u8	plut[74];
+	u32	pfmb;
+	u32	ccdv;
+	u32	pcft;
+	u8	reserved[94];
+};
+
+#define IGD_BACKLIGHT_BRIGHTNESS 0xff
+#define IGD_INITIAL_BRIGHTNESS 0x64
+
+#define IGD_FIELD_VALID	(1 << 31)
+#define IGD_WORD_FIELD_VALID (1 << 15)
+#define IGD_PFIT_STRETCH 6
+
+/* mailbox 4: vbt */
+__packed struct {
+	u8 gvd1[7168];
+} opregion_vbt_t;
+
+/* IGD OpRegion */
+__packed struct igd_opregion {
+	opregion_header_t header;
+	opregion_mailbox1_t mailbox1;
+	opregion_mailbox2_t mailbox2;
+	opregion_mailbox3_t mailbox3;
+	opregion_vbt_t vbt;
+};
+
+/* Intel Video BIOS (Option ROM) */
+__packed struct optionrom_header {
+	u16	signature;
+	u8	size;
+	u8	reserved[21];
+	u16	pcir_offset;
+	u16	vbt_offset;
+};
+
+#define OPROM_SIGNATURE 0xaa55
+
+__packed struct optionrom_pcir {
+	u32 signature;
+	u16 vendor;
+	u16 device;
+	u16 reserved1;
+	u16 length;
+	u8  revision;
+	u8  classcode[3];
+	u16 imagelength;
+	u16 coderevision;
+	u8  codetype;
+	u8  indicator;
+	u16 reserved2;
+};
+
+__packed struct optionrom_vbt {
+	u8  hdr_signature[20];
+	u16 hdr_version;
+	u16 hdr_size;
+	u16 hdr_vbt_size;
+	u8  hdr_vbt_checksum;
+	u8  hdr_reserved;
+	u32 hdr_vbt_datablock;
+	u32 hdr_aim[4];
+	u8  datahdr_signature[16];
+	u16 datahdr_version;
+	u16 datahdr_size;
+	u16 datahdr_datablocksize;
+	u8  coreblock_id;
+	u16 coreblock_size;
+	u16 coreblock_biossize;
+	u8  coreblock_biostype;
+	u8  coreblock_releasestatus;
+	u8  coreblock_hwsupported;
+	u8  coreblock_integratedhw;
+	u8  coreblock_biosbuild[4];
+	u8  coreblock_biossignon[155];
+};
+
+#define VBT_SIGNATURE 0x54425624