southbridge/hudson: Use MMIO instead of PIO to access PM space

The MMIO region is set up by AGESA very early on, so we can use it to
access the PM register space in ramstage. 16-bit accessors are also
provided to simplify some setup tasks. 16-bit accesses are not
possible via PIO.
The pm2_iowrite/read accessors are removed, as they are not used.

Change-Id: Ie7967b5086eb004525c39721338c6495aedc8165
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/5503
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@gmail.com>

3 files changed, 38 insertions, 57 deletions

diff --git a/src/southbridge/amd/agesa/hudson/fadt.c b/src/southbridge/amd/agesa/hudson/fadt.c
index 4c26a0b426..04c5a59b8e 100644
--- a/src/southbridge/amd/agesa/hudson/fadt.c
+++ b/src/southbridge/amd/agesa/hudson/fadt.c
@@ -69,23 +69,15 @@ void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt)
 	fadt->s4bios_req = 0;	/* unused if SMI_CMD = 0 */
 	fadt->pstate_cnt = 0;	/* unused if SMI_CMD = 0 */
 
-	pm_iowrite(0x60, ACPI_PM_EVT_BLK & 0xFF);
-	pm_iowrite(0x61, ACPI_PM_EVT_BLK >> 8);
-	pm_iowrite(0x62, ACPI_PM1_CNT_BLK & 0xFF);
-	pm_iowrite(0x63, ACPI_PM1_CNT_BLK >> 8);
-	pm_iowrite(0x64, ACPI_PM_TMR_BLK & 0xFF);
-	pm_iowrite(0x65, ACPI_PM_TMR_BLK >> 8);
-	pm_iowrite(0x68, ACPI_GPE0_BLK & 0xFF);
-	pm_iowrite(0x69, ACPI_GPE0_BLK >> 8);
-
+	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_iowrite(0x66, ACPI_CPU_CONTROL & 0xFF);
-	pm_iowrite(0x67, ACPI_CPU_CONTROL >> 8);
-
-	pm_iowrite(0x6A, 0);	/* AcpiSmiCmdLo */
-	pm_iowrite(0x6B, 0);	/* AcpiSmiCmdHi */
+	pm_write16(0x66, ACPI_CPU_CONTROL);
+	pm_write16(0x6A, 0);	/* AcpiSmiCmd */
 
-	pm_iowrite(0x74, 1<<0 | 1<<1 | 1<<4 | 1<<2); /* AcpiDecodeEnable, When set, SB uses
+	pm_write8(0x74, 1<<0 | 1<<1 | 1<<4 | 1<<2); /* AcpiDecodeEnable, When set, SB uses
 					* the contents of the PM registers at
 					* index 60-6B to decode ACPI I/O address.
 					* AcpiSmiEn & SmiCmdEn*/
diff --git a/src/southbridge/amd/agesa/hudson/hudson.c b/src/southbridge/amd/agesa/hudson/hudson.c
index 21399117f3..8289c7fef6 100644
--- a/src/southbridge/amd/agesa/hudson/hudson.c
+++ b/src/southbridge/amd/agesa/hudson/hudson.c
@@ -30,6 +30,13 @@
 #include "hudson.h"
 #include "smbus.h"
 
+/* Offsets from ACPI_MMIO_BASE
+ * This is defined by AGESA, but we don't include AGESA headers to avoid
+ * polluting the namesace.
+ */
+#define PM_MMIO_BASE 0xfed80300
+
+
 #if CONFIG_HAVE_ACPI_RESUME
 int acpi_get_sleep_type(void)
 {
@@ -64,39 +71,26 @@ void set_sm_enable_bits(device_t sm_dev, u32 reg_pos, u32 mask, u32 val)
 	}
 }
 
-static void pmio_write_index(u16 port_base, u8 reg, u8 value)
-{
-	outb(reg, port_base);
-	outb(value, port_base + 1);
-}
-
-static u8 pmio_read_index(u16 port_base, u8 reg)
+void pm_write8(u8 reg, u8 value)
 {
-	outb(reg, port_base);
-	return inb(port_base + 1);
+	write8(PM_MMIO_BASE + reg, value);
 }
 
-void pm_iowrite(u8 reg, u8 value)
+u8 pm_read8(u8 reg)
 {
-	pmio_write_index(PM_INDEX, reg, value);
+	return read8(PM_MMIO_BASE + reg);
 }
 
-u8 pm_ioread(u8 reg)
+void pm_write16(u8 reg, u16 value)
 {
-	return pmio_read_index(PM_INDEX, reg);
+	write16(PM_MMIO_BASE + reg, value);
 }
 
-void pm2_iowrite(u8 reg, u8 value)
+u16 pm_read16(u16 reg)
 {
-	pmio_write_index(PM2_INDEX, reg, value);
+	return read16(PM_MMIO_BASE + reg);
 }
 
-u8 pm2_ioread(u8 reg)
-{
-	return pmio_read_index(PM2_INDEX, reg);
-}
-
-
 void hudson_enable(device_t dev)
 {
 	printk(BIOS_DEBUG, "hudson_enable()\n");
@@ -107,24 +101,21 @@ void hudson_enable(device_t dev)
 			device_t sd_dev = dev_find_slot( 0, PCI_DEVFN( 0x14, 7));
 			u32 sd_device_id = pci_read_config32( sd_dev, 0) >> 16;
 			/* turn off the SDHC controller in the PM reg */
-			u8 sd_tmp;
+			u8 reg8;
 			if (sd_device_id == PCI_DEVICE_ID_AMD_HUDSON_SD) {
-				outb(0xE7, PM_INDEX);
-				sd_tmp = inb(PM_DATA);
-				sd_tmp &= ~(1 << 0);
-				outb(sd_tmp, PM_DATA);
+				reg8 = pm_read8(0xe7);
+				reg8 &= ~(1 << 0);
+				pm_write8(0xe7, reg8);
 			}
 			else if (sd_device_id == PCI_DEVICE_ID_AMD_YANGTZE_SD) {
-				outb(0xE8, PM_INDEX);
-				sd_tmp = inb(PM_DATA);
-				sd_tmp &= ~(1 << 0);
-				outb(sd_tmp, PM_DATA);
+				reg8 = pm_read8(0xe8);
+				reg8 &= ~(1 << 0);
+				pm_write8(0xe8, reg8);
 			}
 			/* remove device 0:14.7 from PCI space */
-			outb(0xD3, PM_INDEX);
-			sd_tmp = inb(PM_DATA);
-			sd_tmp &= ~(1 << 6);
-			outb(sd_tmp, PM_DATA);
+			reg8 = pm_read8(0xd3);
+			reg8 &= ~(1 << 6);
+			pm_write8(0xd3, reg8);
 		}
 		break;
 	default:
diff --git a/src/southbridge/amd/agesa/hudson/hudson.h b/src/southbridge/amd/agesa/hudson/hudson.h
index e8f80aaf4e..73e7bd4140 100644
--- a/src/southbridge/amd/agesa/hudson/hudson.h
+++ b/src/southbridge/amd/agesa/hudson/hudson.h
@@ -29,8 +29,6 @@
 #define BIOSRAM_DATA	0xcd5
 #define PM_INDEX	0xcd6
 #define PM_DATA		0xcd7
-#define PM2_INDEX	0xcd0
-#define PM2_DATA	0xcd1
 
 #define HUDSON_ACPI_IO_BASE 0x800
 
@@ -40,12 +38,6 @@
 #define ACPI_GPE0_BLK		(HUDSON_ACPI_IO_BASE + 0x10) /* 8 bytes */
 #define ACPI_CPU_CONTROL	(HUDSON_ACPI_IO_BASE + 0x08) /* 6 bytes */
 
-void pm_iowrite(u8 reg, u8 value);
-u8 pm_ioread(u8 reg);
-void pm2_iowrite(u8 reg, u8 value);
-u8 pm2_ioread(u8 reg);
-void set_sm_enable_bits(device_t sm_dev, u32 reg_pos, u32 mask, u32 val);
-
 #define REV_HUDSON_A11	0x11
 #define REV_HUDSON_A12	0x12
 
@@ -57,6 +49,12 @@ void set_sm_enable_bits(device_t sm_dev, u32 reg_pos, u32 mask, u32 val);
 #define SMI_CMD_PORT                            0xB0                            //      SmiCmdPortAddr;
 #define SPIROM_BASE_ADDRESS_REGISTER    0xA0
 
+void pm_write8(u8 reg, u8 value);
+u8 pm_read8(u8 reg);
+void pm_write16(u8 reg, u16 value);
+u16 pm_read16(u16 reg);
+void set_sm_enable_bits(device_t sm_dev, u32 reg_pos, u32 mask, u32 val);
+
 #ifdef __PRE_RAM__
 void hudson_lpc_port80(void);
 void hudson_pci_port80(void);