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-rw-r--r--src/southbridge/intel/i440bx/chip.h13
-rw-r--r--src/southbridge/intel/i440bx/i440bx_early_smbus.c45
-rw-r--r--src/southbridge/intel/i440bx/i440bx_smbus.c43
-rw-r--r--src/southbridge/intel/i440bx/i440bx_smbus.h230
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;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 18:54:19 +0000