From fd5c30f555012d8e93621e86d6eb918359532529 Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Wed, 10 Jul 2019 22:51:42 +0200
Subject: [PATCH] jtag tools: add config for RaspberryPi

---
 tools/jtag_openocd/interface-raspberrypi.cfg  | 37 +++++++++++++++++++
 tools/jtag_openocd/interface-raspberrypi2.cfg | 37 +++++++++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100644 tools/jtag_openocd/interface-raspberrypi.cfg
 create mode 100644 tools/jtag_openocd/interface-raspberrypi2.cfg

diff --git a/tools/jtag_openocd/interface-raspberrypi.cfg b/tools/jtag_openocd/interface-raspberrypi.cfg
new file mode 100644
index 000000000..984afe41b
--- /dev/null
+++ b/tools/jtag_openocd/interface-raspberrypi.cfg
@@ -0,0 +1,37 @@
+# Config for using Raspberry Pi's expansion header
+# Using BCM2835 chip present in models Pi1, Pi2 and Pi Zero
+
+# Use short cables!
+# Make sure the CPU is not busy with other processes!
+# Connect pm3 before booting to avoid power loss & reboot problems
+# Pinouts:
+# 22     <> TMS
+# 19     <> TDI
+# 21     <> TDO
+# 23     <> TCK
+#  6     <> GND
+#  1     <> 3.3
+
+interface bcm2835gpio
+
+# This file is meant for first versions of Raspberry Pi
+# You can check yours with:
+# dd if=/proc/device-tree/soc/ranges bs=4 skip=1 count=1 2>/dev/null|xxd -p
+# if it returns 20000000, you're fine
+# if it returns 3F000000, use interface-raspberrypi2.cfg
+bcm2835gpio_peripheral_base 0x20000000
+
+# Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
+# These depend on system clock, calibrated for stock 700MHz
+# bcm2835gpio_speed SPEED_COEFF SPEED_OFFSET
+bcm2835gpio_speed_coeffs 113714 28
+
+# Each of the JTAG lines need a gpio number set: tck tms tdi tdo
+# Header pin numbers: 23 22 19 21
+bcm2835gpio_jtag_nums 11 25 10 9
+
+bcm2835gpio_srst_num 18
+reset_config srst_only srst_push_pull
+
+transport select jtag
+adapter_khz 1000
diff --git a/tools/jtag_openocd/interface-raspberrypi2.cfg b/tools/jtag_openocd/interface-raspberrypi2.cfg
new file mode 100644
index 000000000..b779cd290
--- /dev/null
+++ b/tools/jtag_openocd/interface-raspberrypi2.cfg
@@ -0,0 +1,37 @@
+# Config for using Raspberry Pi's expansion header
+# Using BCM2835 chip present in models 2+ and above
+
+# Use short cables!
+# Make sure the CPU is not busy with other processes!
+# Connect pm3 before booting to avoid power loss & reboot problems
+# Pinouts:
+# 22     <> TMS
+# 19     <> TDI
+# 21     <> TDO
+# 23     <> TCK
+#  6     <> GND
+#  1     <> 3.3
+
+interface bcm2835gpio
+
+# This file is meant for recent versions of Raspberry Pi
+# You can check yours with:
+# dd if=/proc/device-tree/soc/ranges bs=4 skip=1 count=1 2>/dev/null|xxd -p
+# if it returns 20000000, use interface-raspberrypi2.cfg
+# if it returns 3F000000, you're fine
+bcm2835gpio_peripheral_base 0x3F000000
+
+# Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
+# These depend on system clock, calibrated for stock 700MHz
+# bcm2835gpio_speed SPEED_COEFF SPEED_OFFSET
+bcm2835gpio_speed_coeffs 146203 36
+
+# Each of the JTAG lines need a gpio number set: tck tms tdi tdo
+# Header pin numbers: 23 22 19 21
+bcm2835gpio_jtag_nums 11 25 10 9
+
+bcm2835gpio_srst_num 18
+reset_config srst_only srst_push_pull
+
+transport select jtag
+adapter_khz 1000