Add support for Google's Chromebook Pixel

Ladies and gentlemen, I'm very happy to announce coreboot support for
the latest and greatest Google Chromebook: The Chromebook Pixel.

See the link below for more information on the Chromebook Pixel, and
its exciting specs:
http://www.google.com/intl/en/chrome/devices/chromebooks.html#pixel

The device is running coreboot and open source firmware on the EC
(see ChromeEC commit for more information on that exciting topic)

Change-Id: I03d00cf391bbb1a32f330793fe9058493e088571
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2482
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 356 insertions, 0 deletions

diff --git a/src/mainboard/google/link/mainboard.c b/src/mainboard/google/link/mainboard.c
new file mode 100644
index 0000000000..a7ddb4ddfb
--- /dev/null
+++ b/src/mainboard/google/link/mainboard.c
@@ -0,0 +1,356 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2011 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <types.h>
+#include <string.h>
+#include <device/device.h>
+#include <device/device.h>
+#include <device/pci_def.h>
+#include <device/pci_ops.h>
+#include <console/console.h>
+#if defined(CONFIG_PCI_OPTION_ROM_RUN_YABEL) && CONFIG_PCI_OPTION_ROM_RUN_YABEL
+#include <x86emu/x86emu.h>
+#endif
+#include <pc80/mc146818rtc.h>
+#include <arch/acpi.h>
+#include <arch/io.h>
+#include <arch/interrupt.h>
+#include <arch/coreboot_tables.h>
+#include "hda_verb.h"
+#include "onboard.h"
+#include "ec.h"
+#include <southbridge/intel/bd82x6x/pch.h>
+#include <smbios.h>
+#include <device/pci.h>
+#include <ec/google/chromeec/ec.h>
+
+/* placeholder for evenual link post. Not sure what we'll
+ * do but it will look nice
+ */
+void mainboard_post(u8 value)
+{
+	/*
+	 * What you DO NOT want to do: push every post to the EC backlight.
+	 * it seems cute but in practice it looks like a hardware failure.
+	 * I'm leaving this here so we don't make this mistake again later.
+	 * And it seems to break the SMP startup.
+	 * google_chromeec_post(value);
+	 */
+}
+
+void mainboard_suspend_resume(void)
+{
+	/* Call SMM finalize() handlers before resume */
+	outb(0xcb, 0xb2);
+}
+
+#if defined(CONFIG_PCI_OPTION_ROM_RUN_REALMODE) && CONFIG_PCI_OPTION_ROM_RUN_REALMODE
+static int int15_handler(struct eregs *regs)
+{
+	int res=-1;
+
+	printk(BIOS_DEBUG, "%s: INT15 function %04x!\n",
+			__func__, regs->eax & 0xffff);
+
+	switch(regs->eax & 0xffff) {
+	case 0x5f34:
+		/*
+		 * Set Panel Fitting Hook:
+		 *  bit 2 = Graphics Stretching
+		 *  bit 1 = Text Stretching
+		 *  bit 0 = Centering (do not set with bit1 or bit2)
+		 *  0     = video bios default
+		 */
+		regs->eax &= 0xffff0000;
+		regs->eax |= 0x005f;
+		regs->ecx &= 0xffffff00;
+		regs->ecx |= 0x00; /* Use video bios default */
+		res = 0;
+		break;
+	case 0x5f35:
+		/*
+		 * Boot Display Device Hook:
+		 *  bit 0 = CRT
+		 *  bit 1 = TV (eDP)
+		 *  bit 2 = EFP
+		 *  bit 3 = LFP
+		 *  bit 4 = CRT2
+		 *  bit 5 = TV2 (eDP)
+		 *  bit 6 = EFP2
+		 *  bit 7 = LFP2
+		 */
+		regs->eax &= 0xffff0000;
+		regs->eax |= 0x005f;
+		regs->ecx &= 0xffff0000;
+		regs->ecx |= 0x0000; /* Use video bios default */
+		res = 0;
+		break;
+	case 0x5f51:
+		/*
+		 * Hook to select active LFP configuration:
+		 *  00h = No LVDS, VBIOS does not enable LVDS
+		 *  01h = Int-LVDS, LFP driven by integrated LVDS decoder
+		 *  02h = SVDO-LVDS, LFP driven by SVDO decoder
+		 *  03h = eDP, LFP Driven by Int-DisplayPort encoder
+		 */
+		regs->eax &= 0xffff0000;
+		regs->eax |= 0x005f;
+		regs->ecx &= 0xffff0000;
+		regs->ecx |= 0x0003; /* eDP */
+		res = 0;
+		break;
+	case 0x5f70:
+		switch ((regs->ecx >> 8) & 0xff) {
+		case 0:
+			/* Get Mux */
+			regs->eax &= 0xffff0000;
+			regs->eax |= 0x005f;
+			regs->ecx &= 0xffff0000;
+			regs->ecx |= 0x0000;
+			res = 0;
+			break;
+		case 1:
+			/* Set Mux */
+			regs->eax &= 0xffff0000;
+			regs->eax |= 0x005f;
+			regs->ecx &= 0xffff0000;
+			regs->ecx |= 0x0000;
+			res = 0;
+			break;
+		case 2:
+			/* Get SG/Non-SG mode */
+			regs->eax &= 0xffff0000;
+			regs->eax |= 0x005f;
+			regs->ecx &= 0xffff0000;
+			regs->ecx |= 0x0000;
+			res = 0;
+			break;
+		default:
+			/* Interrupt was not handled */
+			printk(BIOS_DEBUG, "Unknown INT15 5f70 function: 0x%02x\n",
+				((regs->ecx >> 8) & 0xff));
+			return 0;
+		}
+		break;
+	case 0x5fac:
+		res = 0;
+		break;
+        default:
+		printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
+				regs->eax & 0xffff);
+		break;
+	}
+	return res;
+}
+#endif
+
+#if defined(CONFIG_PCI_OPTION_ROM_RUN_YABEL) && CONFIG_PCI_OPTION_ROM_RUN_YABEL
+static int int15_handler(void)
+{
+	printk(BIOS_DEBUG, "%s: AX=%04x BX=%04x CX=%04x DX=%04x\n",
+			  __func__, M.x86.R_AX, M.x86.R_BX, M.x86.R_CX, M.x86.R_DX);
+
+	switch (M.x86.R_AX) {
+	case 0x5f34:
+		/*
+		 * Set Panel Fitting Hook:
+		 *  bit 2 = Graphics Stretching
+		 *  bit 1 = Text Stretching
+		 *  bit 0 = Centering (do not set with bit1 or bit2)
+		 */
+		M.x86.R_AX = 0x005f;
+		M.x86.R_CX = 0x00;
+		break;
+	case 0x5f35:
+		/*
+		 * Boot Display Device Hook:
+		 *  bit 0 = CRT
+		 *  bit 1 = TV (eDP)
+		 *  bit 2 = EFP
+		 *  bit 3 = LFP
+		 *  bit 4 = CRT2
+		 *  bit 5 = TV2 (eDP)
+		 *  bit 6 = EFP2
+		 *  bit 7 = LFP2
+		 */
+		M.x86.R_AX = 0x005f;
+		M.x86.R_CX = 0x0000; /* Use video bios default */
+		break;
+	case 0x5f51:
+		/*
+		 * Hook to select active LFP configuration:
+		 *  00h = No LVDS, VBIOS does not enable LVDS
+		 *  01h = Int-LVDS, LFP driven by integrated LVDS decoder
+		 *  02h = SVDO-LVDS, LFP driven by SVDO decoder
+		 *  03h = eDP, LFP Driven by Int-DisplayPort encoder
+		 */
+		M.x86.R_AX = 0x005f;
+		M.x86.R_CX = 3; /* eDP */
+		break;
+	case 0x5f70:
+		switch (M.x86.R_CH) {
+		case 0:
+			/* Get Mux */
+			M.x86.R_AX = 0x005f;
+			M.x86.R_CL = 0;
+			break;
+		case 1:
+			/* Set Mux */
+			M.x86.R_AX = 0x005f;
+			M.x86.R_CX = 0;
+			break;
+		case 2:
+			/* Get SG/Non-SG mode */
+			M.x86.R_AX = 0x005f;
+			M.x86.R_CX = 0;
+			break;
+		default:
+			/* Interrupt was not handled */
+			printk(BIOS_DEBUG, "Unknown INT15 5f70 function: 0x%02x\n",
+				M.x86.R_CH);
+			return 0;
+		}
+		break;
+	case 0x5fac:
+		break;
+	default:
+		/* Interrupt was not handled */
+		printk(BIOS_DEBUG, "Unknown INT15 function: 0x%04x\n",
+			M.x86.R_AX);
+		return 0;
+	}
+
+	/* Interrupt handled */
+	return 1;
+}
+#endif
+
+#if CONFIG_PCI_OPTION_ROM_RUN_YABEL || CONFIG_PCI_OPTION_ROM_RUN_REALMODE
+static void int15_install(void)
+{
+#if CONFIG_PCI_OPTION_ROM_RUN_YABEL
+	typedef int (* yabel_handleIntFunc)(void);
+	extern yabel_handleIntFunc yabel_intFuncArray[256];
+	yabel_intFuncArray[0x15] = int15_handler;
+#endif
+#ifdef CONFIG_PCI_OPTION_ROM_RUN_REALMODE
+	mainboard_interrupt_handlers(0x15, &int15_handler);
+#endif
+}
+#endif
+
+/* Audio Setup */
+
+extern const u32 * cim_verb_data;
+extern u32 cim_verb_data_size;
+extern const u32 * pc_beep_verbs;
+extern u32 pc_beep_verbs_size;
+
+static void verb_setup(void)
+{
+	cim_verb_data = mainboard_cim_verb_data;
+	cim_verb_data_size = sizeof(mainboard_cim_verb_data);
+	pc_beep_verbs = mainboard_pc_beep_verbs;
+	pc_beep_verbs_size = mainboard_pc_beep_verbs_size;
+}
+
+static void mainboard_init(device_t dev)
+{
+	/* Initialize the Embedded Controller */
+	link_ec_init();
+
+	if (google_chromeec_get_board_version() == 0) {
+		/* If running on proto1 - enable reversion of gpio11. */
+		u32 gpio_inv;
+		u16 gpio_base = pci_read_config16
+			(dev_find_slot(0, PCI_DEVFN(0x1f, 0)), GPIO_BASE) &
+			0xfffc;
+		u16 gpio_inv_addr = gpio_base + GPI_INV;
+		gpio_inv = inl(gpio_inv_addr);
+		outl(gpio_inv | (1 << 11), gpio_inv_addr);
+	}
+}
+
+static int link_smbios_type41(int *handle, unsigned long *current,
+			      const char *name, u8 irq, u8 addr)
+{
+	struct smbios_type41 *t = (struct smbios_type41 *)*current;
+	int len = sizeof(struct smbios_type41);
+
+	memset(t, 0, sizeof(struct smbios_type41));
+	t->type = SMBIOS_ONBOARD_DEVICES_EXTENDED_INFORMATION;
+	t->handle = *handle;
+	t->length = len - 2;
+	t->reference_designation = smbios_add_string(t->eos, name);
+	t->device_type = SMBIOS_DEVICE_TYPE_OTHER;
+	t->device_status = 1;
+	t->device_type_instance = irq;
+	t->segment_group_number = 0;
+	t->bus_number = addr;
+	t->function_number = 0;
+	t->device_number = 0;
+
+	len = t->length + smbios_string_table_len(t->eos);
+	*current += len;
+	*handle += 1;
+	return len;
+}
+
+static int link_onboard_smbios_data(device_t dev, int *handle,
+				     unsigned long *current)
+{
+	int len = 0;
+
+	len += link_smbios_type41(handle, current,
+				  LINK_LIGHTSENSOR_NAME,
+				  LINK_LIGHTSENSOR_IRQ,
+				  LINK_LIGHTSENSOR_I2C_ADDR);
+
+	len += link_smbios_type41(handle, current,
+				  LINK_TRACKPAD_NAME,
+				  LINK_TRACKPAD_IRQ,
+				  LINK_TRACKPAD_I2C_ADDR);
+
+	len += link_smbios_type41(handle, current,
+				  LINK_TOUCHSCREEN_NAME,
+				  LINK_TOUCHSCREEN_IRQ,
+				  LINK_TOUCHSCREEN_I2C_ADDR);
+
+	return len;
+}
+
+// mainboard_enable is executed as first thing after
+// enumerate_buses().
+
+static void mainboard_enable(device_t dev)
+{
+	dev->ops->init = mainboard_init;
+	dev->ops->get_smbios_data = link_onboard_smbios_data;
+#if CONFIG_PCI_OPTION_ROM_RUN_YABEL || CONFIG_PCI_OPTION_ROM_RUN_REALMODE
+	/* Install custom int15 handler for VGA OPROM */
+	int15_install();
+#endif
+	verb_setup();
+}
+
+struct chip_operations mainboard_ops = {
+	CHIP_NAME("Google Link Chromebook")
+	.enable_dev = mainboard_enable,
+};