Add initial support for the ASUS M4A78-EM.

Signed-off-by: Juhana Helovuo <juhe@iki.fi>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6141 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 210 insertions, 0 deletions

diff --git a/src/mainboard/asus/m4a78-em/mainboard.c b/src/mainboard/asus/m4a78-em/mainboard.c
new file mode 100644
index 000000000000..910fce159d86
--- /dev/null
+++ b/src/mainboard/asus/m4a78-em/mainboard.c
@@ -0,0 +1,210 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2010 Advanced Micro Devices, 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 <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <arch/io.h>
+#include <cpu/x86/msr.h>
+#include <cpu/amd/mtrr.h>
+#include <device/pci_def.h>
+#include <southbridge/amd/sb700/sb700.h>
+#include "chip.h"
+
+
+extern int do_smbus_read_byte(u32 smbus_io_base, u32 device, u32 address);
+extern int do_smbus_write_byte(u32 smbus_io_base, u32 device, u32 address,
+			       u8 val);
+
+
+#define SMBUS_IO_BASE 0x6000
+
+uint64_t uma_memory_base, uma_memory_size;
+
+void set_pcie_dereset(void);
+void set_pcie_reset(void);
+u8 is_dev3_present(void);
+
+void set_pcie_dereset()
+{
+	u8 byte;
+	u16 word;
+	device_t sm_dev;
+	/* set 0 to bit1 :disable GPM9 as SLP_S2 output */
+	/* set 0 to bit2 :disable GPM8 as AZ_RST output */
+	byte = pm_ioread(0x8d);
+	byte &= ~((1 << 1) | (1 << 2));
+	pm_iowrite(0x8d, byte);
+
+	/* set the GPM8 and GPM9 output enable and the value to 1 */
+	byte = pm_ioread(0x94);
+	byte &= ~((1 << 2) | (1 << 3));
+	byte |=  ((1 << 0) | (1 << 1));
+	pm_iowrite(0x94, byte);
+
+	/* set the GPIO65 output enable and the value is 1 */
+	sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
+	word = pci_read_config16(sm_dev, 0x7e);
+	word |= (1 << 0);
+	word &= ~(1 << 4);
+	pci_write_config16(sm_dev, 0x7e, word);
+}
+
+void set_pcie_reset()
+{
+	u8 byte;
+	u16 word;
+	device_t sm_dev;
+
+	/* set 0 to bit1 :disable GPM9 as SLP_S2 output */
+	/* set 0 to bit2 :disable GPM8 as AZ_RST output */
+	byte = pm_ioread(0x8d);
+	byte &= ~((1 << 1) | (1 << 2));
+	pm_iowrite(0x8d, byte);
+
+	/* set the GPM8 and GPM9 output enable and the value to 0 */
+	byte = pm_ioread(0x94);
+	byte &= ~((1 << 2) | (1 << 3));
+	byte &= ~((1 << 0) | (1 << 1));
+	pm_iowrite(0x94, byte);
+
+	/* set the GPIO65 output enable and the value is 0 */
+	sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
+	word = pci_read_config16(sm_dev, 0x7e);
+	word &= ~(1 << 0);
+	word &= ~(1 << 4);
+	pci_write_config16(sm_dev, 0x7e, word);
+}
+
+#if 0	     /* TODO: */
+/********************************************************
+* tilapia uses SB700 GPIO8 to detect IDE_DMA66.
+* IDE_DMA66 is routed to GPIO 8. So we read Gpio 8 to
+* get the cable type, 40 pin or 80 pin?
+********************************************************/
+static void get_ide_dma66(void)
+{
+	u8 byte;
+	/*u32 sm_dev, ide_dev; */
+	device_t sm_dev, ide_dev;
+
+	sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
+
+	byte = pci_read_config8(sm_dev, 0xA9);
+	byte |= (1 << 4);	/* Set Gpio8 as input */
+	pci_write_config8(sm_dev, 0xA9, byte);
+
+	ide_dev = dev_find_slot(0, PCI_DEVFN(0x14, 1));
+	byte = pci_read_config8(ide_dev, 0x56);
+	byte &= ~(7 << 0);
+	if ((1 << 4) & pci_read_config8(sm_dev, 0xAA))
+		byte |= 2 << 0;	/* mode 2 */
+	else
+		byte |= 5 << 0;	/* mode 5 */
+	pci_write_config8(ide_dev, 0x56, byte);
+}
+#endif
+
+/*
+ * justify the dev3 is exist or not
+ * NOTE: This just copied from AMD Tilapia code.
+ * It is completly unknown if it will work at all for this board.
+ */
+u8 is_dev3_present(void)
+{
+	u16 word;
+	device_t sm_dev;
+
+	/* access the smbus extended register */
+	sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
+
+	/* put the GPIO68 output to tristate */
+	word = pci_read_config16(sm_dev, 0x7e);
+	word |= 1 << 6;
+	pci_write_config16(sm_dev, 0x7e,word);
+
+	/* read the GPIO68 input status */
+	word = pci_read_config16(sm_dev, 0x7e);
+
+	if(word & (1 << 10)){
+		/*not exist*/
+		return 0;
+	}else{
+		/*exist*/
+		return 1;
+	}
+}
+
+
+/*************************************************
+* enable the dedicated function in this board.
+* This function called early than rs780_enable.
+*************************************************/
+static void m4a78em_enable(device_t dev)
+{
+	printk(BIOS_INFO, "Mainboard enable. dev=0x%p\n", dev);
+
+#if (CONFIG_GFXUMA == 1)
+	msr_t msr, msr2;
+
+	/* TOP_MEM: the top of DRAM below 4G */
+	msr = rdmsr(TOP_MEM);
+	printk(BIOS_INFO,
+	    "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
+	     __func__, msr.lo, msr.hi);
+
+	/* TOP_MEM2: the top of DRAM above 4G */
+	msr2 = rdmsr(TOP_MEM2);
+	printk(BIOS_INFO,
+	    "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
+	     __func__, msr2.lo, msr2.hi);
+
+	switch (msr.lo) {
+	case 0x10000000:	/* 256M system memory */
+		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
+		break;
+
+	case 0x20000000:	/* 512M system memory */
+		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
+		break;
+
+	default:		/* 1GB and above system memory */
+		uma_memory_size = 0x10000000;	/* 256M recommended UMA */
+		break;
+	}
+
+	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
+	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
+		    __func__, uma_memory_size, uma_memory_base);
+
+	/* TODO: TOP_MEM2 */
+#else
+	uma_memory_size = 0x8000000;	/* 128M recommended UMA */
+	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
+#endif
+
+	set_pcie_dereset();
+	/* get_ide_dma66(); */
+	/* set_thermal_config(); */
+}
+
+struct chip_operations mainboard_ops = {
+	CHIP_NAME("ASUS M4A78-EM Mainboard")
+	.enable_dev = m4a78em_enable,
+};