This add south-bridge (SB700/SB710/SB800 chipset) ACPI platform driver
for Loongson-3. This will be used by EC (Embedded Controller, used by
laptops) driver and STR (Suspend To RAM).
Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
---
arch/mips/loongson/common/pci.c | 6 ++
drivers/platform/mips/Makefile | 1 +
drivers/platform/mips/acpi_init.c | 131 +++++++++++++++++++++++++++++++++++++
3 files changed, 138 insertions(+), 0 deletions(-)
create mode 100644 drivers/platform/mips/acpi_init.c
diff --git a/arch/mips/loongson/common/pci.c b/arch/mips/loongson/common/pci.c
index 003ab4e..4e25756 100644
--- a/arch/mips/loongson/common/pci.c
+++ b/arch/mips/loongson/common/pci.c
@@ -78,6 +78,8 @@ static void __init setup_pcimap(void)
#endif
}
+extern int sbx00_acpi_init(void);
+
static int __init pcibios_init(void)
{
setup_pcimap();
@@ -89,6 +91,10 @@ static int __init pcibios_init(void)
#endif
register_pci_controller(&loongson_pci_controller);
+#ifdef CONFIG_CPU_LOONGSON3
+ sbx00_acpi_init();
+#endif
+
return 0;
}
diff --git a/drivers/platform/mips/Makefile b/drivers/platform/mips/Makefile
index 8dfd039..20e471d 100644
--- a/drivers/platform/mips/Makefile
+++ b/drivers/platform/mips/Makefile
@@ -1 +1,2 @@
+obj-y += acpi_init.o
obj-$(CONFIG_CPU_HWMON) += cpu_hwmon.o
diff --git a/drivers/platform/mips/acpi_init.c b/drivers/platform/mips/acpi_init.c
new file mode 100644
index 0000000..ee2825c
--- /dev/null
+++ b/drivers/platform/mips/acpi_init.c
@@ -0,0 +1,131 @@
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/export.h>
+
+#define SBX00_ACPI_IO_BASE 0x800
+#define SBX00_ACPI_IO_SIZE 0x100
+
+#define ACPI_PM_EVT_BLK (SBX00_ACPI_IO_BASE + 0x00) /* 4 bytes */
+#define ACPI_PM1_CNT_BLK (SBX00_ACPI_IO_BASE + 0x04) /* 2 bytes */
+#define ACPI_PMA_CNT_BLK (SBX00_ACPI_IO_BASE + 0x0F) /* 1 byte */
+#define ACPI_PM_TMR_BLK (SBX00_ACPI_IO_BASE + 0x18) /* 4 bytes */
+#define ACPI_GPE0_BLK (SBX00_ACPI_IO_BASE + 0x10) /* 8 bytes */
+#define ACPI_END (SBX00_ACPI_IO_BASE + 0x80)
+
+#define PM_INDEX 0xCD6
+#define PM_DATA 0xCD7
+#define PM2_INDEX 0xCD0
+#define PM2_DATA 0xCD1
+
+/*
+ * SCI interrupt need acpi space, allocate here
+ */
+
+static int __init register_acpi_resource(void)
+{
+ request_region(SBX00_ACPI_IO_BASE, SBX00_ACPI_IO_SIZE, "acpi");
+ return 0;
+}
+
+static void pmio_write_index(u16 index, u8 reg, u8 value)
+{
+ outb(reg, index);
+ outb(value, index + 1);
+}
+
+static u8 pmio_read_index(u16 index, u8 reg)
+{
+ outb(reg, index);
+ return inb(index + 1);
+}
+
+void pm_iowrite(u8 reg, u8 value)
+{
+ pmio_write_index(PM_INDEX, reg, value);
+}
+EXPORT_SYMBOL(pm_iowrite);
+
+u8 pm_ioread(u8 reg)
+{
+ return pmio_read_index(PM_INDEX, reg);
+}
+EXPORT_SYMBOL(pm_ioread);
+
+void pm2_iowrite(u8 reg, u8 value)
+{
+ pmio_write_index(PM2_INDEX, reg, value);
+}
+EXPORT_SYMBOL(pm2_iowrite);
+
+u8 pm2_ioread(u8 reg)
+{
+ return pmio_read_index(PM2_INDEX, reg);
+}
+EXPORT_SYMBOL(pm2_ioread);
+
+void sci_interrupt_setup(void)
+{
+ u32 temp32;
+
+ /* pm1 base */
+ pm_iowrite(0x22, ACPI_PM1_CNT_BLK & 0xff);
+ pm_iowrite(0x23, ACPI_PM1_CNT_BLK >> 8);
+
+ /* gpm base */
+ pm_iowrite(0x28, ACPI_GPE0_BLK & 0xFF);
+ pm_iowrite(0x29, ACPI_GPE0_BLK >> 8);
+
+ /* gpm base */
+ pm_iowrite(0x2e, ACPI_END & 0xFF);
+ pm_iowrite(0x2f, ACPI_END >> 8);
+
+ /* io decode: When AcpiDecodeEnable set, South-Bridge uses the contents
+ * of the PM registers at index 20-2B to decode ACPI I/O address. e.g.,
+ * AcpiSmiEn & SmiCmdEn */
+ pm_iowrite(0x0E, 1<<3 | 0<<2);
+
+ /* SCI_EN set */
+ outw(1, ACPI_PM1_CNT_BLK);
+
+ /* enable to generate SCI */
+ pm_iowrite(0x10, pm_ioread(0x10) | 1);
+
+ /* gpm3/gpm9 enable */
+ temp32 = inl(ACPI_GPE0_BLK + 4);
+ outl(temp32 | (1 << 14) | (1 << 22), ACPI_GPE0_BLK + 4);
+
+ /* set gpm9 as input */
+ pm_iowrite(0x8d, pm_ioread(0x8d) & (~(1 << 1)));
+
+ /* set gpm9 as non-output */
+ pm_iowrite(0x94, pm_ioread(0x94) | (1 << 3));
+
+ /* gpm3 config ACPI trigger SCIOUT */
+ pm_iowrite(0x33, pm_ioread(0x33) & (~(3 << 4)));
+
+ /* gpm9 config ACPI trigger SCIOUT */
+ pm_iowrite(0x3d, pm_ioread(0x3d) & (~(3 << 2)));
+
+ /* gpm3 config falling edge trigger */
+ pm_iowrite(0x37, pm_ioread(0x37) & (~(1 << 6)));
+
+ /* set gpm3 pull-down enable */
+ temp32 = pm2_ioread(0xf6);
+ temp32 |= ((1 << 7) | (1 << 3));
+ pm2_iowrite(0xf6, temp32);
+
+ /* set gpm9 pull-down enable */
+ temp32 = pm2_ioread(0xf8);
+ temp32 |= ((1 << 5) | (1 << 1));
+ pm2_iowrite(0xf8, temp32);
+}
+
+int __init sbx00_acpi_init(void)
+{
+ register_acpi_resource();
+
+ sci_interrupt_setup();
+
+ return 0;
+}
--
1.7.7.3
