Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4853
-gerrit
commit 47aaf442d257c05f0c49c5a40bb142278c8640e3 Author: Aaron Durbin adurbin@chromium.org Date: Mon Sep 23 14:17:35 2013 -0500
baytrail: add dunit access and registers
The dunit on baytrail is the dram unit. Provide a means to access the configuration registers there using the proper IOSF mechanisms.
BUG=chrome-os-partner:22875 BRANCH=none TEST=Built and booted. Able to read dram registers.
Change-Id: I4d5c019720a7883fe93f3e1860bcd57ce2ea6542 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/170490 --- src/soc/intel/baytrail/baytrail/iosf.h | 16 ++++++++++++++++ src/soc/intel/baytrail/iosf.c | 21 +++++++++++++++++++++ 2 files changed, 37 insertions(+)
diff --git a/src/soc/intel/baytrail/baytrail/iosf.h b/src/soc/intel/baytrail/baytrail/iosf.h index 6ff087b..444dc38 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 6d4cba9..2373d81 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); +}