The early init code of several Intel southbridge chipsets calls

pci_locate_device() to locate the SMBus controller and LPC bridge
devices on the PCI bus. Since these devices are always located at a
fixed PCI bus:device:function, the code can be simplified by
hardcoding the devices.

Signed-off-by: Ed Swierk <eswierk@arastra.com>
Acked-by: Corey Osgood <corey.osgood@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3205 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/southbridge/intel/esb6300/esb6300_early_smbus.c

@@ -4,12 +4,8 @@
 
 static void enable_smbus(void)
 {
-	device_t dev;
+	device_t dev = PCI_DEV(0x0, 0x1f, 0x3);
-	dev = pci_locate_device(PCI_ID(0x8086, 0x25a4), 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, 0x20, SMBUS_IO_BASE | 1);
 	pci_write_config8(dev, 0x40, 1);
@@ -19,11 +15,6 @@ static void enable_smbus(void)
 	
 	/* Disable interrupt generation */
 	outb(0, SMBUS_IO_BASE + SMBHSTCTL);
-
-	dev = pci_locate_device(PCI_ID(0x8086, 0x25a1), 0);
-	if (dev == PCI_DEV_INVALID) {
-		die("ISA bridge not found\r\n");
-	}
 }
 
 static int smbus_read_byte(unsigned device, unsigned address)

src/southbridge/intel/i3100/i3100_early_lpc.c

@@ -20,12 +20,7 @@
 
 static void i3100_enable_superio(void)
 {
-	device_t dev;
+	device_t dev = PCI_DEV(0x0, 0x1f, 0x0);
-	dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_INTEL,
-				       PCI_DEVICE_ID_INTEL_3100_LPC), 0);
-	if (dev == PCI_DEV_INVALID) {
-		die("LPC bridge not found\r\n");
-	}
 
 	/* Enable decoding of I/O locations for SuperIO devices */
 	pci_write_config16(dev, 0x82, 0x340f);
@@ -33,12 +28,7 @@ static void i3100_enable_superio(void)
 
 static void i3100_halt_tco_timer(void)
 {
-	device_t dev;
+	device_t dev = PCI_DEV(0, 0x1f, 0);
-	dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_INTEL,
-				       PCI_DEVICE_ID_INTEL_3100_LPC), 0);
-	if (dev == PCI_DEV_INVALID) {
-		die("LPC bridge not found\r\n");
-	}
 
 	/* Temporarily enable the ACPI I/O range at 0x4000 */
 	pci_write_config32(dev, 0x40, 0x4000 | (1 << 0));

src/southbridge/intel/i3100/i3100_early_smbus.c

@@ -24,12 +24,8 @@
 
 static void enable_smbus(void)
 {
-	device_t dev;
+	device_t dev = PCI_DEV(0x0, 0x1f, 0x3);
-	dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_INTEL,
+
-				       PCI_DEVICE_ID_INTEL_3100_SMB), 0);
-	if (dev == PCI_DEV_INVALID) {
-		die("SMBus controller not found\r\n");
-	}
 	print_spew("SMBus controller enabled\r\n");
 	pci_write_config32(dev, 0x20, SMBUS_IO_BASE | 1);
 	pci_write_config8(dev, 0x40, 1);

src/southbridge/intel/i82801ca/i82801ca_early_smbus.c

@@ -3,11 +3,7 @@
 
 static void enable_smbus(void)
 {
-	device_t dev;
+	device_t dev = PCI_DEV(0x0, 0x1f, 0x3);
-	dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_SMB), 0);
-	if (dev == PCI_DEV_INVALID) {
-		die("SMBUS controller not found\r\n");
-	}
 
 	print_debug("SMBus controller enabled\r\n");
 	/* set smbus iobase */

src/southbridge/intel/i82801db/i82801db_early_smbus.c

@@ -22,11 +22,8 @@
 
 static void enable_smbus(void)
 {
-	device_t dev;
+	device_t dev = PCI_DEV(0x0, 0x1f, 0x3);
-	dev = pci_locate_device(PCI_ID(0x8086, 0x24d3), 0);
+
-	if (dev == PCI_DEV_INVALID) {
-		die("SMBUS controller not found\r\n");
-	}
 	print_spew("SMBus controller enabled\r\n");
 
 	pci_write_config32(dev, 0x20, SMBUS_IO_BASE | 1);
@@ -42,13 +39,6 @@ static void enable_smbus(void)
 
 	/* clear any lingering errors, so the transaction will run */
 	outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
-
-#if 0	// It's unlikely that half the southbridge suddenly vanishes?
-	dev = pci_locate_device(PCI_ID(0x8086, 0x24d0), 0);
-	if (dev == PCI_DEV_INVALID) {
-		die("ISA bridge not found\r\n");
-	}
-#endif
 }
 
 static int smbus_read_byte(unsigned device, unsigned address)

src/southbridge/intel/i82801dbm/i82801dbm_early_smbus.c

@@ -21,11 +21,7 @@
 
 static void enable_smbus(void)
 {
-	device_t dev;
+	device_t dev = PCI_DEV(0x0, 0x1f, 0x3);
-	dev = pci_locate_device(PCI_ID(0x8086, 0x24c3), 0);
-	if (dev == PCI_DEV_INVALID) {
-		die("SMBUS controller not found\r\n");
-	}
 
 	print_debug("SMBus controller enabled\r\n");
 	/* set smbus iobase */

src/southbridge/intel/i82801er/i82801er_early_smbus.c

@@ -4,11 +4,8 @@
 
 static void enable_smbus(void)
 {
-	device_t dev;
+	device_t dev = PCI_DEV(0x0, 0x1f, 0x3);
-	dev = pci_locate_device(PCI_ID(0x8086, 0x24d3), 0);
+
-	if (dev == PCI_DEV_INVALID) {
-		die("SMBUS controller not found\r\n");
-	}
 	print_spew("SMBus controller enabled\r\n");
 
 	pci_write_config32(dev, 0x20, SMBUS_IO_BASE | 1);
@@ -24,13 +21,6 @@ static void enable_smbus(void)
 
 	/* clear any lingering errors, so the transaction will run */
 	outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
-
-#if 0	// It's unlikely that half the southbridge suddenly vanishes?
-	dev = pci_locate_device(PCI_ID(0x8086, 0x24d0), 0);
-	if (dev == PCI_DEV_INVALID) {
-		die("ISA bridge not found\r\n");
-	}
-#endif
 }
 
 static int smbus_read_byte(unsigned device, unsigned address)