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authorRonald G. Minnich <rminnich@google.com>2013-06-30 20:30:58 -0700
committerAlexandru Gagniuc <mr.nuke.me@gmail.com>2013-12-07 03:42:55 +0100
commit01ab2d14be086bd6fda82eaad000a34e6abb9047 (patch)
treef2eedc99fd9c790cadb8ca18b7ff90f6e46ef7a0 /src
parent6f0e160459aa7d1de34da85978df5f3282c973ce (diff)
downloadcoreboot-01ab2d14be086bd6fda82eaad000a34e6abb9047.tar.xz
Add kernel-derived support functions for DDI.
Newer mainboards that use haswell -- and, presumably, chipsets to come -- need some support functions. Add them in the drivers/intel/gma directory. Currently, this is one file: intel_ddi.c, but more may come. Compilation of this file is controlled by INTEL_DDI, defined in the Kconfig as default n and used in the Makefile.inc Change-Id: I501ee291c0d4589925ed3e478f67106337fcad31 Signed-off-by: Ronald G. Minnich <rminnich@google.com> Reviewed-on: https://gerrit.chromium.org/gerrit/60612 Tested-by: Ronald G. Minnich <rminnich@chromium.org> Reviewed-by: Ronald G. Minnich <rminnich@chromium.org> Commit-Queue: Ronald G. Minnich <rminnich@chromium.org> Reviewed-on: http://review.coreboot.org/4337 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Diffstat (limited to 'src')
-rw-r--r--src/drivers/intel/gma/Kconfig6
-rw-r--r--src/drivers/intel/gma/Makefile.inc1
-rw-r--r--src/drivers/intel/gma/intel_ddi.c107
3 files changed, 114 insertions, 0 deletions
diff --git a/src/drivers/intel/gma/Kconfig b/src/drivers/intel/gma/Kconfig
index 1a4212bd49..073f70819b 100644
--- a/src/drivers/intel/gma/Kconfig
+++ b/src/drivers/intel/gma/Kconfig
@@ -22,3 +22,9 @@ config INTEL_DP
default n
help
helper functions for intel display port operations
+
+config INTEL_DDI
+ bool
+ default n
+ help
+ helper functions for intel DDI operations
diff --git a/src/drivers/intel/gma/Makefile.inc b/src/drivers/intel/gma/Makefile.inc
index c90daa4f37..0c3f45a17e 100644
--- a/src/drivers/intel/gma/Makefile.inc
+++ b/src/drivers/intel/gma/Makefile.inc
@@ -18,4 +18,5 @@
##
ramstage-$(CONFIG_INTEL_DP) += intel_dp.c drm_dp_helper.c
+ramstage-$(CONFIG_INTEL_DDI) += intel_ddi.c
diff --git a/src/drivers/intel/gma/intel_ddi.c b/src/drivers/intel/gma/intel_ddi.c
new file mode 100644
index 0000000000..659d73ca04
--- /dev/null
+++ b/src/drivers/intel/gma/intel_ddi.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2013 Google Inc.
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Eugeni Dodonov <eugeni.dodonov@intel.com>
+ *
+ */
+#include <types.h>
+#include <string.h>
+#include <stdlib.h>
+#include <device/device.h>
+#include <device/device.h>
+#include <device/pci_def.h>
+#include <device/pci_ops.h>
+#include <console/console.h>
+#include <delay.h>
+#include <pc80/mc146818rtc.h>
+#include <arch/acpi.h>
+#include <arch/io.h>
+#include <arch/interrupt.h>
+#include <boot/coreboot_tables.h>
+#include <smbios.h>
+#include <device/pci.h>
+#include <ec/google/chromeec/ec.h>
+#include <cbfs_core.h>
+
+#include <cpu/x86/tsc.h>
+#include <cpu/x86/cache.h>
+#include <cpu/x86/mtrr.h>
+#include <cpu/x86/msr.h>
+#include <edid.h>
+#include <drivers/intel/gma/i915.h>
+
+/* HDMI/DVI modes ignore everything but the last 2 items. So we share
+ * them for both DP and FDI transports, allowing those ports to
+ * automatically adapt to HDMI connections as well.
+ */
+static u32 hsw_ddi_translations_dp[] = {
+ 0x00FFFFFF, 0x0006000E, /* DP parameters */
+ 0x00D75FFF, 0x0005000A,
+ 0x00C30FFF, 0x00040006,
+ 0x80AAAFFF, 0x000B0000,
+ 0x00FFFFFF, 0x0005000A,
+ 0x00D75FFF, 0x000C0004,
+ 0x80C30FFF, 0x000B0000,
+ 0x00FFFFFF, 0x00040006,
+ 0x80D75FFF, 0x000B0000,
+ 0x00FFFFFF, 0x00040006 /* HDMI parameters */
+};
+
+static u32 hsw_ddi_translations_fdi[] = {
+ 0x00FFFFFF, 0x0007000E, /* FDI parameters */
+ 0x00D75FFF, 0x000F000A,
+ 0x00C30FFF, 0x00060006,
+ 0x00AAAFFF, 0x001E0000,
+ 0x00FFFFFF, 0x000F000A,
+ 0x00D75FFF, 0x00160004,
+ 0x00C30FFF, 0x001E0000,
+ 0x00FFFFFF, 0x00060006,
+ 0x00D75FFF, 0x001E0000,
+ 0x00FFFFFF, 0x00040006 /* HDMI parameters */
+};
+
+/* On Haswell, DDI port buffers must be programmed with correct values
+ * in advance. The buffer values are different for FDI and DP modes,
+ * but the HDMI/DVI fields are shared among those. So we program the DDI
+ * in either FDI or DP modes only, as HDMI connections will work with both
+ * of those.
+ */
+void intel_prepare_ddi_buffers(int port, int use_fdi_mode)
+{
+ u32 reg;
+ int i;
+ u32 *ddi_translations = ((use_fdi_mode) ?
+ hsw_ddi_translations_fdi :
+ hsw_ddi_translations_dp);
+
+ printk(BIOS_SPEW, "Initializing DDI buffers for port %d in %s mode\n",
+ port,
+ use_fdi_mode ? "FDI" : "DP");
+
+ for (i=0,reg=DDI_BUF_TRANS(port);i < ARRAY_SIZE(hsw_ddi_translations_fdi);i++) {
+ io_i915_write32(ddi_translations[i], reg);
+ reg += 4;
+ }
+}
+