add framework for i440bx chipset

add support for NSC pc87351 SuperIO
add Bitworks/IMS manboard config

This is a very basic framework for the i440bx chipset and the 
Bitworks IMS board that uses it.  Most things are 
structure only.

Known issues:
- SMbus reads to the RAM SPD come back
all zero.
- dump_spd_registers() is commented out since it breaks with
the default setting of generic_dump_spd.c where it wants
2 memory controllers.



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2347 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

4 files changed, 331 insertions, 0 deletions

diff --git a/src/southbridge/intel/i440bx/chip.h b/src/southbridge/intel/i440bx/chip.h
new file mode 100644
index 0000000000..5952e38582
--- /dev/null
+++ b/src/southbridge/intel/i440bx/chip.h
@@ -0,0 +1,13 @@
+#ifndef I440BX_CHIP_H
+#define I440BX_CHIP_H
+
+struct southbridge_intel_i440bx_config 
+{
+	unsigned int ide0_enable : 1;
+	unsigned int ide1_enable : 1;
+};
+
+struct chip_operations;
+extern struct chip_operations southbridge_intel_i440bx_ops;
+
+#endif /* I440BX_CHIP_H */
diff --git a/src/southbridge/intel/i440bx/i440bx_early_smbus.c b/src/southbridge/intel/i440bx/i440bx_early_smbus.c
new file mode 100644
index 0000000000..a3db7b88c0
--- /dev/null
+++ b/src/southbridge/intel/i440bx/i440bx_early_smbus.c
@@ -0,0 +1,45 @@
+#include "i440bx_smbus.h"
+
+#define SMBUS_IO_BASE 0x0f00
+
+static void enable_smbus(void)
+{
+	device_t dev;
+	dev = pci_locate_device(PCI_ID(0x8086, 0x7113), 0);
+	if (dev == PCI_DEV_INVALID) {
+		die("SMBUS controller not found\r\n");
+	}
+	uint8_t enable;
+	print_spew("SMBus controller enabled\r\n");
+	pci_write_config32(dev, 0x90, SMBUS_IO_BASE );
+	// Enable and set SMBBus 
+	// 0x01 Interrupt to SMI# 
+	// (0x4<<1)|1 set interrupt to IRQ9
+	pci_write_config8(dev, 0xd2, (0x4<<1)|1);
+	
+	// Enable the IO space
+	pci_write_config16(dev, 0x04, 1);
+	
+	/* clear any lingering errors, so the transaction will run */
+	outb(0x1e, SMBUS_IO_BASE + SMBGSTATUS);
+}
+
+static int smbus_recv_byte(unsigned device)
+{
+	return do_smbus_recv_byte(SMBUS_IO_BASE, device);
+}
+
+static int smbus_send_byte(unsigned device, unsigned char val)
+{
+	return do_smbus_send_byte(SMBUS_IO_BASE, device, val);
+}
+
+static int smbus_read_byte(unsigned device, unsigned address)
+{
+	return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
+}
+
+static int smbus_write_byte(unsigned device, unsigned address, unsigned char val)
+{
+	return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val);
+}
diff --git a/src/southbridge/intel/i440bx/i440bx_smbus.c b/src/southbridge/intel/i440bx/i440bx_smbus.c
new file mode 100644
index 0000000000..9609e357c1
--- /dev/null
+++ b/src/southbridge/intel/i440bx/i440bx_smbus.c
@@ -0,0 +1,43 @@
+/*
+ * (C) 2004 Linux Networx
+ * (C) 2005 Bitworks
+*/
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <device/smbus.h>
+#include <arch/io.h>
+#include "i440bx.h"
+
+
+static void lpci_set_subsystem(device_t dev, unsigned vendor, unsigned device)
+{
+	pci_write_config32(dev, 0x44, 
+		((device & 0xffff) << 16) | (vendor & 0xffff));
+}
+
+static struct smbus_bus_operations lops_smbus_bus = {
+};
+
+static struct pci_operations lops_pci = {
+	.set_subsystem = lpci_set_subsystem,
+};
+static struct device_operations smbus_ops = {
+	.read_resources   = pci_dev_read_resources,
+	.set_resources    = pci_dev_set_resources,
+	.enable_resources = pci_dev_enable_resources,
+	.init             = 0,
+	.scan_bus         = scan_static_bus,
+	.enable           = i440bx_enable,
+	.ops_pci          = &lops_pci,
+	.ops_smbus_bus    = &lops_smbus_bus,
+};
+
+static struct pci_driver smbus_driver __pci_driver = {
+	.ops = &smbus_ops,
+	.vendor = PCI_VENDOR_ID_INTEL,
+	.device = PCI_DEVICE_INTEL_440BX_SMB,
+};
diff --git a/src/southbridge/intel/i440bx/i440bx_smbus.h b/src/southbridge/intel/i440bx/i440bx_smbus.h
new file mode 100644
index 0000000000..9a100c0f8b
--- /dev/null
+++ b/src/southbridge/intel/i440bx/i440bx_smbus.h
@@ -0,0 +1,230 @@
+#include <device/smbus_def.h>
+
+#define SMBGSTATUS 0x0
+#define SMBGCTL    0x2
+#define SMBHSTCMD  0x3
+#define SMBHSTADDR 0x4
+#define SMBHSTDAT  0x5
+
+#define SMBUS_TIMEOUT (100*1000*10)
+#define SMBUS_STATUS_MASK 0x1e
+
+static inline void smbus_delay(void)
+{
+	outb(0x80, 0x80);
+	outb(0x80, 0x80);
+	outb(0x80, 0x80);
+	outb(0x80, 0x80);
+	outb(0x80, 0x80);
+	outb(0x80, 0x80);
+}
+
+static int smbus_wait_until_ready(unsigned smbus_io_base)
+{
+	unsigned long loops;
+	loops = SMBUS_TIMEOUT;
+	do {
+		unsigned char val;
+		smbus_delay();
+		val = inb(smbus_io_base + SMBGSTATUS);
+		if ((val & 0x1) == 0) {
+			break;
+		}
+		if(loops == (SMBUS_TIMEOUT / 2)) {
+			outw(inw(smbus_io_base + SMBGSTATUS), 
+				smbus_io_base + SMBGSTATUS);
+		}
+	} while(--loops);
+	return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+}
+
+static int smbus_wait_until_done(unsigned smbus_io_base)
+{
+	unsigned long loops;
+	loops = SMBUS_TIMEOUT;
+	do {
+		unsigned short val;
+		smbus_delay();
+		
+		val = inb(smbus_io_base + SMBGSTATUS);
+		// Make sure the command is done
+		if ((val & 0x1) != 0) { 
+			continue;
+		}
+		// Don't break out until one of the interrupt
+		// flags is set.
+		if (val & 0xfe) {
+			break;
+		}
+	} while(--loops);
+	return loops?0:SMBUS_WAIT_UNTIL_DONE_TIMEOUT;
+}
+
+static int do_smbus_recv_byte(unsigned smbus_io_base, unsigned device)
+{
+	unsigned global_status_register;
+	unsigned byte;
+
+	if (smbus_wait_until_ready(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+	}
+	
+	/* setup transaction */
+	/* disable interrupts */
+	outw(inw(smbus_io_base + SMBGCTL) & ~((1<<10)|(1<<9)|(1<<8)|(1<<4)), smbus_io_base + SMBGCTL);
+	/* set the device I'm talking too */
+	outw(((device & 0x7f) << 1) | 1, smbus_io_base + SMBHSTADDR);
+	/* set the command/address... */
+	outb(0, smbus_io_base + SMBHSTCMD);
+	/* set up for a send byte */
+	outw((inw(smbus_io_base + SMBGCTL) & ~7) | (0x1), smbus_io_base + SMBGCTL);
+
+	/* clear any lingering errors, so the transaction will run */
+	/* Do I need to write the bits to a 1 to clear an error? */
+	outw(inw(smbus_io_base + SMBGSTATUS), smbus_io_base + SMBGSTATUS);
+
+	/* set the data word...*/
+	outw(0, smbus_io_base + SMBHSTDAT);
+
+	/* start the command */
+	outw((inw(smbus_io_base + SMBGCTL) | (1 << 3)), smbus_io_base + SMBGCTL);
+
+
+	/* poll for transaction completion */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_DONE_TIMEOUT;
+	}
+
+	global_status_register = inw(smbus_io_base + SMBGSTATUS);
+
+	/* read results of transaction */
+	byte = inb(smbus_io_base + SMBHSTDAT) & 0xff;
+
+	// Check for any result other than a command completion
+	if ((global_status_register & SMBUS_STATUS_MASK) != (1 << 1)) {
+		return SMBUS_ERROR;
+	}
+	return byte;
+}
+
+static int do_smbus_send_byte(unsigned smbus_io_base, unsigned device, unsigned value)
+{
+	unsigned global_status_register;
+
+	if (smbus_wait_until_ready(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+	}
+	
+	/* setup transaction */
+	/* disable interrupts */
+	outw(inw(smbus_io_base + SMBGCTL) & ~((1<<10)|(1<<9)|(1<<8)|(1<<4)), smbus_io_base + SMBGCTL);
+	/* set the device I'm talking too */
+	outw(((device & 0x7f) << 1) | 0, smbus_io_base + SMBHSTADDR);
+	/* set the command/address... */
+	outb(0, smbus_io_base + SMBHSTCMD);
+	/* set up for a send byte */
+	outw((inw(smbus_io_base + SMBGCTL) & ~7) | (0x1), smbus_io_base + SMBGCTL);
+
+	/* clear any lingering errors, so the transaction will run */
+	/* Do I need to write the bits to a 1 to clear an error? */
+	outw(inw(smbus_io_base + SMBGSTATUS), smbus_io_base + SMBGSTATUS);
+
+	/* set the data word...*/
+	outw(value, smbus_io_base + SMBHSTDAT);
+
+	/* start the command */
+	outw((inw(smbus_io_base + SMBGCTL) | (1 << 3)), smbus_io_base + SMBGCTL);
+
+
+	/* poll for transaction completion */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_DONE_TIMEOUT;
+	}
+	global_status_register = inw(smbus_io_base + SMBGSTATUS);
+
+	if ((global_status_register & SMBUS_STATUS_MASK) != (1 << 4)) {
+		return SMBUS_ERROR;
+	}
+	return 0;
+}
+
+
+static int do_smbus_read_byte(unsigned smbus_io_base, unsigned device, unsigned address)
+{
+	unsigned global_status_register;
+	unsigned byte;
+
+	if (smbus_wait_until_ready(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+	}
+	
+	/* setup transaction */
+
+	/* clear any lingering errors, so the transaction will run */
+	outb(0x1e, smbus_io_base + SMBGSTATUS);
+
+	/* set the device I'm talking too */
+	outb(((device & 0x7f) << 1) | 1, smbus_io_base + SMBHSTADDR);
+	/* set the command/address... */
+	outb(address & 0xFF, smbus_io_base + SMBHSTCMD);
+
+	/* clear the data word...*/
+	outb(0, smbus_io_base + SMBHSTDAT);
+
+	/* start a byte read with interrupts disabled */
+	outb( (0x02 << 2)|(1<<6), smbus_io_base + SMBGCTL);
+
+	/* poll for transaction completion */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_DONE_TIMEOUT;
+	}
+
+	global_status_register = inw(smbus_io_base + SMBGSTATUS);
+
+	/* read results of transaction */
+	byte = inw(smbus_io_base + SMBHSTDAT) & 0xff;
+
+	if ((global_status_register & SMBUS_STATUS_MASK) != (1 << 4)) {
+		return SMBUS_ERROR;
+	}
+	return byte;
+}
+
+static int do_smbus_write_byte(unsigned smbus_io_base, unsigned device, unsigned address, unsigned char val)
+{
+	unsigned global_status_register;
+
+	if (smbus_wait_until_ready(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+	}
+
+	/* setup transaction */
+	/* disable interrupts */
+	outw(inw(smbus_io_base + SMBGCTL) & ~((1<<10)|(1<<9)|(1<<8)|(1<<4)), smbus_io_base + SMBGCTL);
+	/* set the device I'm talking too */
+	outw(((device & 0x7f) << 1) | 0, smbus_io_base + SMBHSTADDR);
+	outb(address & 0xFF, smbus_io_base + SMBHSTCMD);
+	/* set up for a byte data write */ /* FIXME */
+	outw((inw(smbus_io_base + SMBGCTL) & ~7) | (0x2), smbus_io_base + SMBGCTL);
+	/* clear any lingering errors, so the transaction will run */
+	/* Do I need to write the bits to a 1 to clear an error? */
+	outw(inw(smbus_io_base + SMBGSTATUS), smbus_io_base + SMBGSTATUS);
+
+	/* write the data word...*/
+	outw(val, smbus_io_base + SMBHSTDAT);
+
+	/* start the command */
+	outw((inw(smbus_io_base + SMBGCTL) | (1 << 3)), smbus_io_base + SMBGCTL);
+
+	/* poll for transaction completion */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_DONE_TIMEOUT;
+	}
+	global_status_register = inw(smbus_io_base + SMBGSTATUS);
+
+	if ((global_status_register & SMBUS_STATUS_MASK) != (1 << 4)) {
+		return SMBUS_ERROR;
+	}
+	return 0;
+}
+