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-rw-r--r--src/soc/intel/baytrail/baytrail/iosf.h16
-rw-r--r--src/soc/intel/baytrail/iosf.c21
2 files changed, 37 insertions, 0 deletions
diff --git a/src/soc/intel/baytrail/baytrail/iosf.h b/src/soc/intel/baytrail/baytrail/iosf.h
index 6ff087bdb6..444dc38fb1 100644
--- a/src/soc/intel/baytrail/baytrail/iosf.h
+++ b/src/soc/intel/baytrail/baytrail/iosf.h
@@ -51,6 +51,8 @@
uint32_t iosf_bunit_read(int reg);
void iosf_bunit_write(int reg, uint32_t val);
+uint32_t iosf_dunit_read(int reg);
+void iosf_dunit_write(int reg, uint32_t val);
/* IOSF ports. */
#define IOSF_PORT_AUNIT 0x00 /* IO Arbiter unit */
@@ -106,6 +108,20 @@ void iosf_bunit_write(int reg, uint32_t val);
#define BUNIT_SMRRH 0x2f
# define BUNIT_SMRR_ENABLE (1 << 31)
+/*
+ * DUNIT Registers.
+ */
+#define DRP 0x00
+# define DRP_CH0_RANK0_EN (0x01 << 0)
+# define DRP_CH0_RANK1_EN (0x01 << 1)
+# define DRP_CH1_RANK0_EN (0x01 << 2)
+# define DRP_CH1_RANK1_EN (0x01 << 3)
+#define DTR0 0x01
+# define DTR0_SPEED_MASK 0x03
+# define DTR0_SPEED_800 0x00
+# define DTR0_SPEED_1066 0x01
+# define DTR0_SPEED_1333 0x02
+# define DTR0_SPEED_1600 0x03
#endif /* _BAYTRAIL_IOSF_H_ */
diff --git a/src/soc/intel/baytrail/iosf.c b/src/soc/intel/baytrail/iosf.c
index 6d4cba9bb6..2373d81598 100644
--- a/src/soc/intel/baytrail/iosf.c
+++ b/src/soc/intel/baytrail/iosf.c
@@ -59,3 +59,24 @@ void iosf_bunit_write(int reg, uint32_t val)
write_iosf_reg(MCR_REG, cr);
write_iosf_reg(MDR_REG, val);
}
+
+uint32_t iosf_dunit_read(int reg)
+{
+ uint32_t cr = IOSF_OPCODE(IOSF_OP_READ_SYSMEMC) |
+ IOSF_PORT(IOSF_PORT_SYSMEMC) | IOSF_REG(reg) |
+ IOSF_BYTE_EN;
+
+ write_iosf_reg(MCR_REG, cr);
+ return read_iosf_reg(MDR_REG);
+}
+
+void iosf_dunit_write(int reg, uint32_t val)
+{
+ uint32_t cr = IOSF_OPCODE(IOSF_OP_WRITE_SYSMEMC) |
+ IOSF_PORT(IOSF_PORT_SYSMEMC) | IOSF_REG(reg) |
+ IOSF_BYTE_EN;
+
+
+ write_iosf_reg(MCR_REG, cr);
+ write_iosf_reg(MDR_REG, val);
+}