southbridge/hudson: Initialize ACPI IO ports separate of FADT

The ACPI IO ports, and the respective SMI (for HAVE_SMI_HANDLER), were
initialized when the FADT table was written. This works well on a cold
boot, but the ACPI ports are not initialized on S3 resume, as ACPI
tables are not written. This will not work on S3 resume if the default
ports are not what we set them, or if AGESA sets them to some other
value.

To solve this, move the port configuration to southbridge chip init.

Change-Id: Ib4043f0fa5e20f08d320acd12ce84d4d789cd035
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/5559
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@gmail.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/src/southbridge/amd/agesa/hudson/hudson.c b/src/southbridge/amd/agesa/hudson/hudson.c
index 39dab23d0d..0edca6eafe 100644
--- a/src/southbridge/amd/agesa/hudson/hudson.c
+++ b/src/southbridge/amd/agesa/hudson/hudson.c
@@ -29,6 +29,7 @@
 #include <cbmem.h>
 #include "hudson.h"
 #include "smbus.h"
+#include "smi.h"
 
 /* Offsets from ACPI_MMIO_BASE
  * This is defined by AGESA, but we don't include AGESA headers to avoid
@@ -129,7 +130,39 @@ unsigned long get_top_of_ram(void)
 }
 #endif
 
+static void hudson_init_acpi_ports(void)
+{
+	/* We use some of these ports in SMM regardless of whether or not
+	 * ACPI tables are generated. Enable these ports indiscriminately.
+	 */
+
+	pm_write16(0x60, ACPI_PM_EVT_BLK);
+	pm_write16(0x62, ACPI_PM1_CNT_BLK);
+	pm_write16(0x64, ACPI_PM_TMR_BLK);
+	pm_write16(0x68, ACPI_GPE0_BLK);
+	/* CpuControl is in \_PR.CPU0, 6 bytes */
+	pm_write16(0x66, ACPI_CPU_CONTROL);
+
+	if (IS_ENABLED(CONFIG_HAVE_SMI_HANDLER)) {
+		pm_write16(0x6a, ACPI_SMI_CTL_PORT);
+		hudson_enable_acpi_cmd_smi();
+	} else {
+		pm_write16(0x6a, 0);
+	}
+
+	/* AcpiDecodeEnable, When set, SB uses the contents of the PM registers
+	 * at index 60-6B to decode ACPI I/O address. AcpiSmiEn & SmiCmdEn
+	 */
+	pm_write8(0x74, 1<<0 | 1<<1 | 1<<4 | 1<<2);
+}
+
+static void hudson_init(void *chip_info)
+{
+	hudson_init_acpi_ports();
+}
+
 struct chip_operations southbridge_amd_agesa_hudson_ops = {
 	CHIP_NAME("ATI HUDSON")
 	.enable_dev = hudson_enable,
+	.init = hudson_init
 };