summaryrefslogtreecommitdiff
path: root/doc
diff options
context:
space:
mode:
Diffstat (limited to 'doc')
-rw-r--r--doc/README.fsl-ddr52
-rw-r--r--doc/README.p1_p2_rdb_pc46
2 files changed, 98 insertions, 0 deletions
diff --git a/doc/README.fsl-ddr b/doc/README.fsl-ddr
index c1ee0a6..abfb7f1 100644
--- a/doc/README.fsl-ddr
+++ b/doc/README.fsl-ddr
@@ -170,3 +170,55 @@ Single slot system
Reference http://www.xrosstalkmag.com/mag_issues/xrosstalk_oct08_final.pdf
http://download.micron.com/pdf/technotes/ddr3/tn4108_ddr3_design_guide.pdf
+
+
+Table for ODT for DDR2
+======================
+Two slots system
++-----------------------+----------+---------------+-----------------------------+-----------------------------+
+| Configuration | |DRAM controller| Slot 1 | Slot 2 |
++-----------+-----------+----------+-------+-------+--------------+--------------+--------------+--------------+
+| | | | | | Rank 1 | Rank 2 | Rank 1 | Rank 2 |
++ Slot 1 | Slot 2 |Write/Read| Write | Read |-------+------+-------+------+-------+------+-------+------+
+| | | | | | Write | Read | Write | Read | Write | Read | Write | Read |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 1 | off | 150 | off | off | off | off | 75 | 75 | off | off |
+| Dual Rank | Dual Rank |----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 2 | off | 150 | 75 | 75 | off | off | off | off | off | off |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 1 | off | 150 | off | off | off | off | 75 | 75 | | |
+| Dual Rank |Single Rank|----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 2 | off | 150 | 75 | 75 | off | off | off | off | | |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 1 | off | 150 | off | off | | | 75 | 75 | off | off |
+|Single Rank| Dual Rank |----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 2 | off | 150 | 75 | 75 | | | off | off | off | off |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 1 | off | 150 | off | off | | | 75 | 75 | | |
+|Single Rank|Single Rank|----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| | | Slot 2 | off | 150 | 75 | 75 | | | off | off | | |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| Dual Rank | Empty | Slot 1 | off | 75 | 150 | off | off | off | | | | |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| Empty | Dual Rank | Slot 2 | off | 75 | | | | | 150 | off | off | off |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+|Single Rank| Empty | Slot 1 | off | 75 | 150 | off | | | | | | |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+| Empty |Single Rank| Slot 2 | off | 75 | | | | | 150 | off | | |
++-----------+-----------+----------+-------+-------+-------+------+-------+------+-------+------+-------+------+
+
+Single slot system
++-------------+------------+---------------+-----------------------------+
+| | |DRAM controller| Rank 1 | Rank 2 |
+|Configuration| Write/Read |-------+-------+-------+------+-------+------+
+| | | Write | Read | Write | Read | Write | Read |
++-------------+------------+-------+-------+-------+------+-------+------+
+| | R1 | off | 75 | 150 | off | off | off |
+| Dual Rank |------------+-------+-------+-------+------+-------+------+
+| | R2 | off | 75 | 150 | off | off | off |
++-------------+------------+-------+-------+-------+------+-------+------+
+| Single Rank | R1 | off | 75 | 150 | off |
++-------------+------------+-------+-------+-------+------+
+
+Reference http://www.samsung.com/global/business/semiconductor/products/dram/downloads/applicationnote/ddr2_odt_control_200603.pdf
+
diff --git a/doc/README.p1_p2_rdb_pc b/doc/README.p1_p2_rdb_pc
new file mode 100644
index 0000000..4437731
--- /dev/null
+++ b/doc/README.p1_p2_rdb_pc
@@ -0,0 +1,46 @@
+Overview
+--------
+P1_P2_RDB_PC represents a set of boards including
+ P1020MSBG-PC
+ P1020RDB-PC
+ P1020UTM-PC
+ P1021RDB-PC
+ P1024RDB
+ P1025RDB
+ P2020RDB-PC
+
+They have similar design of P1020RDB but have DDR3 instead of DDR2. P2020RDB-PC
+has 64-bit DDR. All others have 32-bit DDR.
+
+Key features on these boards include:
+ * DDR3
+ * NOR flash
+ * NAND flash (on RDB's only)
+ * SPI flash (on RDB's only)
+ * SDHC/MMC card slot
+ * VSC7385 Ethernet switch (on P1020MBG, P1020RDB, & P1021RDB)
+ * PCIE slot and mini-PCIE slots
+
+As these boards use soldered DDR chips not regular DIMMs, an on-board EEPROM
+is used to store SPD data. In case of absent or corrupted SPD, falling back
+to timing data embedded in the source code will be used. Raw timing data is
+extracted from DDR chip datasheet. Different speeds of DDR are supported with
+this approach. ODT option is forced to fit this set of boards, again because
+they don't have regular DIMMs.
+
+CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS is defined as 5ms to meet specification
+for writing timing.
+
+VSC firmware Address is defined by default in config file for eTSEC1.
+
+SD width is based off DIP switch. DIP switch is detected on the
+board by reading i2c bus and setting the appropriate mux values.
+
+Some boards have QE module in the silicon (P1021 and P1025). QE and eLBC have
+pins multiplexing. QE function needs to be disabled to access Nor Flash and
+CPLD. QE-UEC and QE-UART can be enabled for linux kernel by setting "qe"
+in hwconfig. In addition, QE-UEC and QE-TDM also have pins multiplexing, to
+enable QE-TDM for linux kernel, set "qe;tdm" in hwconfig. Syntax is as below
+
+'setenv hwconfig qe' to enable QE UEC/UART and disable Nor-Flash/CPLD.
+'setenv hwconfig 'qe;tdm'' to enalbe QE TDM and disable Nor-Flash/CPLD.