amd/southbridge/lpc: SPI BAR has fixed size/location

The CIMX sb700/sb800/sb900 and agesa/hudson code was treating
the LPC SPI BAR as a normal PCI BAR. This will set the
resources for a fixed size at a fixed address. This was tested
on hp/abm, amd/persimmon, and gizmosphere/gizmo boards.

Change-Id: I1367efe0bbb53b7727258585963f61f4bd02ea1d
Signed-off-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-on: http://review.coreboot.org/5947
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

6 files changed, 32 insertions, 18 deletions

diff --git a/src/southbridge/amd/cimx/sb700/lpc.c b/src/southbridge/amd/cimx/sb700/lpc.c
index 91d7d2fd51..5d05762f55 100644
--- a/src/southbridge/amd/cimx/sb700/lpc.c
+++ b/src/southbridge/amd/cimx/sb700/lpc.c
@@ -46,8 +46,6 @@ void lpc_read_resources(device_t dev)
 	/* Get the normal pci resources of this device */
 	pci_dev_read_resources(dev);	/* We got one for APIC, or one more for TRAP */
 
-	pci_get_resource(dev, SPIROM_BASE_ADDRESS); /* SPI ROM base address */
-
 	/* Add an extra subtractive resource for both memory and I/O. */
 	res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
 	res->base = 0;
@@ -61,6 +59,9 @@ void lpc_read_resources(device_t dev)
 	res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
 		     IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 
+	/* Add a memory resource for the SPI BAR. */
+	fixed_mem_resource(dev, 2, SPI_BASE_ADDRESS / 1024, 1, IORESOURCE_SUBTRACTIVE);
+
 	res = new_resource(dev, 3);
 	res->base = IO_APIC_ADDR;
 	res->size = 0x00001000;
@@ -75,11 +76,13 @@ void lpc_set_resources(struct device *dev)
 	struct resource *res;
 
 	printk(BIOS_SPEW, "SB700 - Lpc.c - %s - Start.\n", __func__);
+
+	/* Special case. SPI Base Address. The SpiRomEnable should STAY set. */
+	res = find_resource(dev, 2);
+	pci_write_config32(dev, SPIROM_BASE_ADDRESS_REGISTER, res->base | SPI_ROM_ENABLE);
+
 	pci_dev_set_resources(dev);
 
-	/* Specical case. SPI Base Address. The SpiRomEnable should be set. */
-	res = find_resource(dev, SPIROM_BASE_ADDRESS);
-	pci_write_config32(dev, SPIROM_BASE_ADDRESS, res->base | 1 << 1);
 	printk(BIOS_SPEW, "SB700 - Lpc.c - %s - End.\n", __func__);
 }
 
diff --git a/src/southbridge/amd/cimx/sb700/lpc.h b/src/southbridge/amd/cimx/sb700/lpc.h
index e110026126..b30f2470d4 100644
--- a/src/southbridge/amd/cimx/sb700/lpc.h
+++ b/src/southbridge/amd/cimx/sb700/lpc.h
@@ -21,7 +21,9 @@
 #define _SB700_LPC_H_
 
 
-#define SPIROM_BASE_ADDRESS	0xA0 /* SPI ROM base address */
+#define SPIROM_BASE_ADDRESS_REGISTER  0xA0
+#define SPI_ROM_ENABLE                0x02
+#define SPI_BASE_ADDRESS              0xFEC10000
 
 void lpc_read_resources(device_t dev);
 void lpc_set_resources(device_t dev);
diff --git a/src/southbridge/amd/cimx/sb800/lpc.c b/src/southbridge/amd/cimx/sb800/lpc.c
index a1e0dc96df..519e3c1175 100644
--- a/src/southbridge/amd/cimx/sb800/lpc.c
+++ b/src/southbridge/amd/cimx/sb800/lpc.c
@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ * Copyright (C) 2014 Sage Electronic Engineering, LLC
  *
  * 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
@@ -33,8 +34,6 @@ void lpc_read_resources(device_t dev)
 	/* Get the normal pci resources of this device */
 	pci_dev_read_resources(dev);	/* We got one for APIC, or one more for TRAP */
 
-	pci_get_resource(dev, SPIROM_BASE_ADDRESS_REGISTER); /* SPI ROM base address */
-
 	/* Add an extra subtractive resource for both memory and I/O. */
 	res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
 	res->base = 0;
@@ -48,6 +47,9 @@ void lpc_read_resources(device_t dev)
 	res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
 		     IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 
+	/* Add a memory resource for the SPI BAR. */
+	fixed_mem_resource(dev, 2, SPI_BASE_ADDRESS / 1024, 1, IORESOURCE_SUBTRACTIVE);
+
 	res = new_resource(dev, 3);
 	res->base = IO_APIC_ADDR;
 	res->size = 0x00001000;
@@ -64,8 +66,8 @@ void lpc_set_resources(struct device *dev)
 	printk(BIOS_DEBUG, "SB800 - Lpc.c - lpc_set_resources - Start.\n");
 
 	/* Special case. SPI Base Address. The SpiRomEnable should STAY set. */
-	res = find_resource(dev, SPIROM_BASE_ADDRESS_REGISTER);
-	res->base |= PCI_COMMAND_MEMORY;
+	res = find_resource(dev, 2);
+	pci_write_config32(dev, SPIROM_BASE_ADDRESS_REGISTER, res->base | SPI_ROM_ENABLE);
 
 	pci_dev_set_resources(dev);
 
diff --git a/src/southbridge/amd/cimx/sb800/lpc.h b/src/southbridge/amd/cimx/sb800/lpc.h
index 575b9f7a75..8a657d8559 100644
--- a/src/southbridge/amd/cimx/sb800/lpc.h
+++ b/src/southbridge/amd/cimx/sb800/lpc.h
@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ * Copyright (C) 2014 Sage Electronic Engineering, LLC
  *
  * 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
@@ -20,7 +21,9 @@
 #ifndef _SB800_LPC_H_
 #define _SB800_LPC_H_
 
-#define SPIROM_BASE_ADDRESS_REGISTER	0xA0 /* SPI ROM base address */
+#define SPIROM_BASE_ADDRESS_REGISTER  0xA0
+#define SPI_ROM_ENABLE                0x02
+#define SPI_BASE_ADDRESS              0xFEC10000
 
 void lpc_read_resources(device_t dev);
 void lpc_set_resources(device_t dev);
diff --git a/src/southbridge/amd/cimx/sb900/lpc.c b/src/southbridge/amd/cimx/sb900/lpc.c
index 5b414f41a5..ce1be11da7 100644
--- a/src/southbridge/amd/cimx/sb900/lpc.c
+++ b/src/southbridge/amd/cimx/sb900/lpc.c
@@ -31,8 +31,6 @@ void lpc_read_resources(device_t dev)
 	/* Get the normal pci resources of this device */
 	pci_dev_read_resources(dev);	/* We got one for APIC, or one more for TRAP */
 
-	pci_get_resource(dev, SPIROM_BASE_ADDRESS); /* SPI ROM base address */
-
 	/* Add an extra subtractive resource for both memory and I/O. */
 	res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
 	res->base = 0;
@@ -46,6 +44,9 @@ void lpc_read_resources(device_t dev)
 	res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
 		     IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 
+	/* Add a memory resource for the SPI BAR. */
+	fixed_mem_resource(dev, 2, SPI_BASE_ADDRESS / 1024, 1, IORESOURCE_SUBTRACTIVE);
+
 	res = new_resource(dev, 3);
 	res->base = IO_APIC_ADDR;
 	res->size = 0x00001000;
@@ -60,11 +61,13 @@ void lpc_set_resources(struct device *dev)
 	struct resource *res;
 
 	printk(BIOS_DEBUG, "SB900 - Lpc.c - lpc_set_resources - Start.\n");
+
+	/* Special case. SPI Base Address. The SpiRomEnable should STAY set. */
+	res = find_resource(dev, 2);
+	pci_write_config32(dev, SPIROM_BASE_ADDRESS_REGISTER, res->base | SPI_ROM_ENABLE);
+
 	pci_dev_set_resources(dev);
 
-	/* Specical case. SPI Base Address. The SpiRomEnable should be set. */
-	res = find_resource(dev, SPIROM_BASE_ADDRESS);
-	pci_write_config32(dev, SPIROM_BASE_ADDRESS, res->base | 1 << 1);
 	printk(BIOS_DEBUG, "SB900 - Lpc.c - lpc_set_resources - End.\n");
 }
 
diff --git a/src/southbridge/amd/cimx/sb900/lpc.h b/src/southbridge/amd/cimx/sb900/lpc.h
index c0c5f20195..66f3ccd8cd 100644
--- a/src/southbridge/amd/cimx/sb900/lpc.h
+++ b/src/southbridge/amd/cimx/sb900/lpc.h
@@ -20,8 +20,9 @@
 #ifndef _SB900_LPC_H_
 #define _SB900_LPC_H_
 
-
-#define SPIROM_BASE_ADDRESS	0xA0 /* SPI ROM base address */
+#define SPIROM_BASE_ADDRESS_REGISTER  0xA0
+#define SPI_ROM_ENABLE                0x02
+#define SPI_BASE_ADDRESS              0xFEC10000
 
 void lpc_read_resources(device_t dev);
 void lpc_set_resources(device_t dev);