Add support for "Butterfly" Chromebook

We're happy to announce coreboot support for the "Butterfly"
Chromebook, a.k.a HP Pavilion Chromebook.

More information at:
http://www.google.com/intl/en/chrome/devices/hp-pavilion-chromebook.html

This commit also includes support for the ENE KB3940Q embedded controller
running on Quanta's firmware.

Change-Id: I194f847a94005218ec04eeba091c3257ac459510
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2359
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins)

1 files changed, 307 insertions, 0 deletions

diff --git a/src/mainboard/google/butterfly/romstage.c b/src/mainboard/google/butterfly/romstage.c
new file mode 100644
index 0000000000..352f8d65eb
--- /dev/null
+++ b/src/mainboard/google/butterfly/romstage.c
@@ -0,0 +1,307 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2010 coresystems GmbH
+ * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
+ *
+ * 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 <stdint.h>
+#include <string.h>
+#include <lib.h>
+#include <timestamp.h>
+#include <arch/byteorder.h>
+#include <arch/io.h>
+#include <arch/romcc_io.h>
+#include <device/pci_def.h>
+#include <device/pnp_def.h>
+#include <cpu/x86/lapic.h>
+#include <pc80/mc146818rtc.h>
+#include <cbmem.h>
+#include <console/console.h>
+#include "northbridge/intel/sandybridge/sandybridge.h"
+#include "northbridge/intel/sandybridge/raminit.h"
+#include "southbridge/intel/bd82x6x/pch.h"
+#include "southbridge/intel/bd82x6x/gpio.h"
+#include <arch/cpu.h>
+#include <cpu/x86/bist.h>
+#include <cpu/x86/msr.h>
+#include "gpio.h"
+#if CONFIG_CHROMEOS
+#include <vendorcode/google/chromeos/chromeos.h>
+#endif
+#include <cbfs.h>
+
+static void pch_enable_lpc(void)
+{
+	/* EC Decode Range Port60/64 and Port62/66 */
+	/* Enable EC and PS/2 Keyboard/Mouse*/
+	pci_write_config16(PCH_LPC_DEV, LPC_EN, KBC_LPC_EN | MC_LPC_EN);
+
+	/* EC Decode Range Port68/6C */
+	pci_write_config32(PCH_LPC_DEV, LPC_GEN1_DEC, (0x68 & ~3) | 0x40001);
+
+	/* EC Decode Range Port 380-387 */
+	pci_write_config32(PCH_LPC_DEV, LPC_GEN2_DEC, 0x380 | 0x40001);
+
+}
+
+static void rcba_config(void)
+{
+	u32 reg32;
+
+	/*
+	 *             GFX    INTA -> PIRQA (MSI)
+	 * D28IP_P1IP  WLAN   INTA -> PIRQB
+	 * D28IP_P2IP  ETH0   INTB -> PIRQF
+	 * D28IP_P3IP  SDCARD INTC -> PIRQD
+	 * D29IP_E1P   EHCI1  INTA -> PIRQD
+	 * D26IP_E2P   EHCI2  INTA -> PIRQF
+	 * D31IP_SIP   SATA   INTA -> PIRQB (MSI)
+	 * D31IP_SMIP  SMBUS  INTB -> PIRQH
+	 * D31IP_TTIP  THRT   INTC -> PIRQA
+	 * D27IP_ZIP   HDA    INTA -> PIRQA (MSI)
+	 *
+	 * Trackpad interrupt is edge triggered and cannot be shared.
+	 * TRACKPAD                -> PIRQG
+
+	 */
+
+	/* Device interrupt pin register (board specific) */
+	RCBA32(D31IP) = (INTC << D31IP_TTIP) | (NOINT << D31IP_SIP2) |
+			(INTB << D31IP_SMIP) | (INTA << D31IP_SIP);
+	RCBA32(D29IP) = (INTA << D29IP_E1P);
+	RCBA32(D28IP) = (INTA << D28IP_P1IP) | (INTB << D28IP_P2IP) |
+			(INTC << D28IP_P3IP);
+	RCBA32(D27IP) = (INTA << D27IP_ZIP);
+	RCBA32(D26IP) = (INTA << D26IP_E2P);
+	RCBA32(D25IP) = (NOINT << D25IP_LIP);
+	RCBA32(D22IP) = (NOINT << D22IP_MEI1IP);
+
+	/* Device interrupt route registers */
+	DIR_ROUTE(D31IR, PIRQB, PIRQH, PIRQA, PIRQC);
+	DIR_ROUTE(D29IR, PIRQD, PIRQE, PIRQF, PIRQG);
+	DIR_ROUTE(D28IR, PIRQB, PIRQF, PIRQD, PIRQE);
+	DIR_ROUTE(D27IR, PIRQA, PIRQH, PIRQA, PIRQB);
+	DIR_ROUTE(D26IR, PIRQF, PIRQE, PIRQG, PIRQH);
+	DIR_ROUTE(D25IR, PIRQA, PIRQB, PIRQC, PIRQD);
+	DIR_ROUTE(D22IR, PIRQA, PIRQB, PIRQC, PIRQD);
+
+	/* Enable IOAPIC (generic) */
+	RCBA16(OIC) = 0x0100;
+	/* PCH BWG says to read back the IOAPIC enable register */
+	(void) RCBA16(OIC);
+
+	/* Disable unused devices (board specific) */
+	reg32 = RCBA32(FD);
+	reg32 |= PCH_DISABLE_ALWAYS;
+	/* Disable PCI bridge so MRC does not probe this bus */
+	reg32 |= PCH_DISABLE_P2P;
+	RCBA32(FD) = reg32;
+}
+
+void main(unsigned long bist)
+{
+	int boot_mode = 0;
+	int cbmem_was_initted;
+	u32 pm1_cnt;
+	u16 pm1_sts;
+
+#if CONFIG_COLLECT_TIMESTAMPS
+	tsc_t start_romstage_time;
+	tsc_t before_dram_time;
+	tsc_t after_dram_time;
+	tsc_t base_time = {
+		.lo = pci_read_config32(PCI_DEV(0, 0x00, 0), 0xdc),
+		.hi = pci_read_config32(PCI_DEV(0, 0x1f, 2), 0xd0)
+	};
+#endif
+	struct pei_data pei_data = {
+		pei_version: PEI_VERSION,
+		mchbar: DEFAULT_MCHBAR,
+		dmibar: DEFAULT_DMIBAR,
+		epbar: DEFAULT_EPBAR,
+		pciexbar: CONFIG_MMCONF_BASE_ADDRESS,
+		smbusbar: SMBUS_IO_BASE,
+		wdbbar: 0x4000000,
+		wdbsize: 0x1000,
+		hpet_address: CONFIG_HPET_ADDRESS,
+		rcba: DEFAULT_RCBABASE,
+		pmbase: DEFAULT_PMBASE,
+		gpiobase: DEFAULT_GPIOBASE,
+		thermalbase: 0xfed08000,
+		system_type: 0, // 0 Mobile, 1 Desktop/Server
+		tseg_size: CONFIG_SMM_TSEG_SIZE,
+		spd_addresses: { 0xA0, 0x00,0xA4,0x00 },
+		ts_addresses: { 0x00, 0x00, 0x00, 0x00 },
+		ec_present: 1,
+		ddr3lv_support: 0,
+		// 0 = leave channel enabled
+		// 1 = disable dimm 0 on channel
+		// 2 = disable dimm 1 on channel
+		// 3 = disable dimm 0+1 on channel
+		dimm_channel0_disabled: 2,
+		dimm_channel1_disabled: 2,
+		max_ddr3_freq: 1600,
+		usb_port_config: {
+			 /* enabled   usb oc pin    length */
+			{ 1, 0, 0x0040 }, /* P0: Right USB 3.0 #1 (no OC) */
+			{ 1, 0, 0x0040 }, /* P1: Right USB 3.0 #2 (no OC) */
+			{ 1, 0, 0x0040 }, /* P2: Camera (no OC) */
+			{ 0, 0, 0x0000 }, /* P3: Empty */
+			{ 0, 0, 0x0000 }, /* P4: Empty */
+			{ 0, 0, 0x0000 }, /* P5: Empty */
+			{ 0, 0, 0x0000 }, /* P6: Empty */
+			{ 0, 0, 0x0000 }, /* P7: Empty */
+			{ 0, 4, 0x0000 }, /* P8: Empty */
+			{ 1, 4, 0x0080 }, /* P9: Left USB 1 (no OC) */
+			{ 1, 4, 0x0040 }, /* P10: Mini PCIe - WLAN / BT (no OC) */
+			{ 0, 4, 0x0000 }, /* P11: Empty */
+			{ 0, 4, 0x0000 }, /* P12: Empty */
+			{ 0, 4, 0x0000 }, /* P13: Empty */
+		},
+	};
+
+#if CONFIG_COLLECT_TIMESTAMPS
+	start_romstage_time = rdtsc();
+#endif
+
+	if (bist == 0)
+		enable_lapic();
+
+	pch_enable_lpc();
+
+	/* Enable GPIOs */
+	pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE|1);
+	pci_write_config8(PCH_LPC_DEV, GPIO_CNTL, 0x10);
+	setup_pch_gpios(&butterfly_gpio_map);
+
+	/* Initialize console device(s) */
+	console_init();
+
+	/* Halt if there was a built in self test failure */
+	report_bist_failure(bist);
+
+	if (MCHBAR16(SSKPD) == 0xCAFE) {
+		printk(BIOS_DEBUG, "soft reset detected\n");
+		boot_mode = 1;
+
+		/* System is not happy after keyboard reset... */
+		printk(BIOS_DEBUG, "Issuing CF9 warm reset\n");
+		outb(0x6, 0xcf9);
+		hlt();
+	}
+
+	/* Perform some early chipset initialization required
+	 * before RAM initialization can work
+	 */
+	sandybridge_early_initialization(SANDYBRIDGE_MOBILE);
+	printk(BIOS_DEBUG, "Back from sandybridge_early_initialization()\n");
+
+	/* Check PM1_STS[15] to see if we are waking from Sx */
+	pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
+
+	/* Read PM1_CNT[12:10] to determine which Sx state */
+	pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
+
+	if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
+#if CONFIG_HAVE_ACPI_RESUME
+		printk(BIOS_DEBUG, "Resume from S3 detected.\n");
+		boot_mode = 2;
+		/* Clear SLP_TYPE. This will break stage2 but
+		 * we care for that when we get there.
+		 */
+		outl(pm1_cnt & ~(7 << 10), DEFAULT_PMBASE + PM1_CNT);
+#else
+		printk(BIOS_DEBUG, "Resume from S3 detected, but disabled.\n");
+#endif
+	}
+
+	post_code(0x38);
+	/* Enable SPD ROMs and DDR-III DRAM */
+	enable_smbus();
+
+	/* Prepare USB controller early in S3 resume */
+	if (boot_mode == 2)
+		enable_usb_bar();
+
+	post_code(0x39);
+
+	post_code(0x3a);
+	pei_data.boot_mode = boot_mode;
+#if CONFIG_COLLECT_TIMESTAMPS
+	before_dram_time = rdtsc();
+#endif
+	sdram_initialize(&pei_data);
+
+#if CONFIG_COLLECT_TIMESTAMPS
+	after_dram_time = rdtsc();
+#endif
+	post_code(0x3c);
+
+	rcba_config();
+	post_code(0x3d);
+
+	quick_ram_check();
+	post_code(0x3e);
+
+	MCHBAR16(SSKPD) = 0xCAFE;
+#if CONFIG_EARLY_CBMEM_INIT
+	cbmem_was_initted = !cbmem_initialize();
+#else
+	cbmem_was_initted = cbmem_reinit((uint64_t) (get_top_of_ram()
+						     - HIGH_MEMORY_SIZE));
+#endif
+
+#if CONFIG_HAVE_ACPI_RESUME
+	/* If there is no high memory area, we didn't boot before, so
+	 * this is not a resume. In that case we just create the cbmem toc.
+	 */
+
+	*(u32 *)CBMEM_BOOT_MODE = 0;
+	*(u32 *)CBMEM_RESUME_BACKUP = 0;
+
+	if ((boot_mode == 2) && cbmem_was_initted) {
+		void *resume_backup_memory = cbmem_find(CBMEM_ID_RESUME);
+		if (resume_backup_memory) {
+			*(u32 *)CBMEM_BOOT_MODE = boot_mode;
+			*(u32 *)CBMEM_RESUME_BACKUP = (u32)resume_backup_memory;
+		}
+		/* Magic for S3 resume */
+		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafed00d);
+	} else if (boot_mode == 2) {
+		/* Failed S3 resume, reset to come up cleanly */
+		outb(0x6, 0xcf9);
+		hlt();
+	} else {
+		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafebabe);
+	}
+#endif
+	post_code(0x3f);
+#if CONFIG_CHROMEOS
+	init_chromeos(boot_mode);
+#endif
+#if CONFIG_COLLECT_TIMESTAMPS
+	timestamp_init(base_time);
+	timestamp_add(TS_START_ROMSTAGE, start_romstage_time );
+	timestamp_add(TS_BEFORE_INITRAM, before_dram_time );
+	timestamp_add(TS_AFTER_INITRAM, after_dram_time );
+	timestamp_add_now(TS_END_ROMSTAGE);
+#endif
+#if CONFIG_CONSOLE_CBMEM
+	/* Keep this the last thing this function does. */
+	cbmemc_reinit();
+#endif
+}