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authorNico Huber <nico.h@gmx.de>2019-03-21 23:17:06 +0100
committerNico Huber <nico.h@gmx.de>2019-05-30 13:46:41 +0000
commit10490b98e2c8b7b0c6c275b6b809d48697f6ee2f (patch)
tree6c34b5d4ed95c3f50f8280dd2a94268f1d1b6ccf /Documentation
parent2b99a01e0d28ae3c755480e12beb130e8b1550ac (diff)
downloadcoreboot-10490b98e2c8b7b0c6c275b6b809d48697f6ee2f.tar.xz
mb/roda/rk9: Document flash header
Change-Id: I5bd131635340ffa0c6b8979fc8e263fc5f09fdc5 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32025 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/mainboard/index.md4
-rw-r--r--Documentation/mainboard/roda/rk9/flash_header.md23
2 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/mainboard/index.md b/Documentation/mainboard/index.md
index 7e0dab2f4c..fb4f5022aa 100644
--- a/Documentation/mainboard/index.md
+++ b/Documentation/mainboard/index.md
@@ -81,6 +81,10 @@ The boards in this section are not real mainboards, but emulators.
- [MS-7707](msi/ms7707/ms7707.md)
+## Roda
+
+- [RK9 Flash Header](roda/rk9/flash_header.md)
+
## SiFive
- [SiFive HiFive Unleashed](sifive/hifive-unleashed.md)
diff --git a/Documentation/mainboard/roda/rk9/flash_header.md b/Documentation/mainboard/roda/rk9/flash_header.md
new file mode 100644
index 0000000000..c2978cbe68
--- /dev/null
+++ b/Documentation/mainboard/roda/rk9/flash_header.md
@@ -0,0 +1,23 @@
+Roda RK9 Flash Header
+=====================
+
+There is a 5x2 pin, 1.27mm pitch header *J1* south of the BIOS flash. It
+follows the pinout of the Dediprog adaptor board:
+
+ +------+
+ | 1 2 | 1: HOLD 2 2: CS 2
+ | 3 4 | 3: CS 1 4: VCC
+ | 5 6 | 5: MISO 6: HOLD 1
+ | 7 8 | 7: 8: CLK
+ | 9 10 | 9: GND 10: MOSI
+ +------+
+
+Pins 3 to 10 directly map to the regular SPI flash pinout.
+
+There is also a *JP17* around. Ideally, it should be closed during
+programming (isolates the SPI bus from the southbridge):
+
+ +---+
+ | 1 | 1: SF100-I/O3
+ | 2 | 2: GND
+ +---+