tcl/target: add config for Qualcomm QCA4531

The QCA4531 is a two stream (2x2) 802.11b/g/n single-band programmable
Wi-Fi System-on-Chip (SoC) for the Internet of Things (IoT).
https://www.qualcomm.com/products/qca4531

Change-Id: I58398c00943b005cfaf0ac1eaad92d1fa4e2cba7
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Reviewed-on: http://openocd.zylin.com/4405
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>

1 files changed, 154 insertions, 0 deletions

diff --git a/tcl/target/qualcomm_qca4531.cfg b/tcl/target/qualcomm_qca4531.cfg
new file mode 100644
index 0000000..3d21578
--- /dev/null
+++ b/tcl/target/qualcomm_qca4531.cfg
@@ -0,0 +1,154 @@
+# The QCA4531 is a two stream (2x2) 802.11b/g/n single-band programmable
+# Wi-Fi System-on-Chip (SoC) for the Internet of Things (IoT).
+#
+# Product page:
+# https://www.qualcomm.com/products/qca4531
+#
+# Notes:
+# - MIPS Processor ID (PRId): 0x00019374
+# - 24Kc MIPS processor with 64 KB I-Cache and 32 KB D-Cache,
+#   operating at up to 650 MHz
+# - External 16-bit DDR1, operating at up to 200 MHz, DDR2 operating at up
+#   to 300 MHz
+# - TRST is not available.
+# - EJTAG PrRst signal is not supported
+# - RESET_L pin B56 on the SoC will reset internal JTAG logic.
+#
+# Pins related for debug and bootstrap:
+# Name		Pin		Description
+#   JTAG
+# JTAG_TCK	GPIO0, (A27)	Software configurable, default JTAG
+# JTAG_TDI	GPIO1, (B23)	Software configurable, default JTAG
+# JTAG_TDO	GPIO2, (A28)	Software configurable, default JTAG
+# JTAG_TMS	GPIO3, (A29)	Software configurable, default JTAG
+#   Reset
+# RESET_L	-, (B56)	Input only
+# SYS_RST_L	GPIO17, (A79)	Output reset request or GPIO
+#   Bootstrap
+# JTAG_MODE	GPIO16, (A78)	0 - JTAG (Default); 1 - EJTAG
+# DDR_SELECT	GPIO10, (A57)	0 - DDR2; 1 - DDR1
+#   UART
+# UART0_SOUT	GPIO10, (A57)
+# UART0_SIN	GPIO9, (B49)
+
+# Per default we need to use "none" variant to be able properly "reset init"
+# or "reset halt" the CPU.
+reset_config none srst_pulls_trst
+
+# For SRST based variant we still need proper timings.
+# For ETH part the reset should be asserted at least for 10ms
+# Since there is no other information let's take 100ms to be sure.
+adapter_nsrst_assert_width 100
+
+# according to the SoC documentation it should take at least 5ms from
+# reset end till bootstrap end. In the practice we need 8ms to get JTAG back
+# to live.
+adapter_nsrst_delay 8
+
+if { [info exists CHIPNAME] } {
+	set _CHIPNAME $_CHIPNAME
+} else {
+	set _CHIPNAME qca4531
+}
+
+jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id 0x00000001
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME mips_m4k -endian big -chain-position $_TARGETNAME
+
+# provide watchdog helper.
+proc disable_watchdog { } {
+	mww 0xb8060008 0x0
+}
+
+$_TARGETNAME configure -event halted { disable_watchdog }
+
+# Since PrRst is not supported and SRST will reset complete chip
+# with JTAG engine, we need to reset CPU from CPU itself.
+$_TARGETNAME configure -event reset-assert-pre {
+	halt
+}
+
+$_TARGETNAME configure -event reset-assert {
+	catch "mww 0xb806001C 0x01000000"
+}
+
+# To be able to trigger complete chip reset, in case JTAG is blocked
+# or CPU not responding, we still can use this helper.
+proc full_reset { } {
+	reset_config srst_only
+	reset
+	halt
+	reset_config none
+}
+
+# Section with helpers which can be used by boards
+proc qca4531_ddr2_550_550_init {} {
+	# Clear reset flags for different SoC components
+	mww 0xb806001c 0xfeceffff
+	mww 0xb806001c 0xeeceffff
+	mww 0xb806001c 0xe6ceffff
+
+	# PMU configurations
+	# Internal Switcher
+	mww 0xb8116c40 0x633c8176
+	# Increase the DDR voltage
+	mww 0xb8116c44 0x10200000
+	# XTAL Configurations
+	mww 0xb81162c0 0x4b962100
+	mww 0xb81162c4 0x480
+	mww 0xb81162c8 0x04000144
+	# Recommended PLL configurations
+	mww 0xb81161c4 0x54086000
+	mww 0xb8116244 0x54086000
+
+	# PLL init
+	mww 0xb8050008 0x0131001c
+	mww 0xb8050000 0x40001580
+	mww 0xb8050004 0x40015800
+	mww 0xb8050008 0x0131001c
+	mww 0xb8050000 0x00001580
+	mww 0xb8050004 0x00015800
+	mww 0xb8050008 0x01310000
+	mww 0xb8050044 0x781003ff
+	mww 0xb8050048 0x003c103f
+
+	# DDR2 init
+	mww 0xb8000108 0x401f0042
+	mww 0xb80000b8 0x0000166d
+	mww 0xb8000000 0xcfaaf33b
+	mww 0xb800015c 0x0000000f
+	mww 0xb8000004 0xa272efa8
+	mww 0xb8000018 0x0000ffff
+	mww 0xb80000c4 0x74444444
+	mww 0xb80000c8 0x00000444
+	mww 0xb8000004 0xa210ee28
+	mww 0xb8000004 0xa2b2e1a8
+	mww 0xb8000010 0x8
+	mww 0xb80000bc 0x0
+	mww 0xb8000010 0x10
+	mww 0xb80000c0 0x0
+	mww 0xb8000010 0x40
+	mww 0xb800000c 0x2
+	mww 0xb8000010 0x2
+	mww 0xb8000008 0xb43
+	mww 0xb8000010 0x1
+	mww 0xb8000010 0x8
+	mww 0xb8000010 0x4
+	mww 0xb8000010 0x4
+	mww 0xb8000008 0xa43
+	mww 0xb8000010 0x1
+	mww 0xb800000c 0x382
+	mww 0xb8000010 0x2
+	mww 0xb800000c 0x402
+	mww 0xb8000010 0x2
+	mww 0xb8000014 0x40be
+	mww 0xb800001C 0x20
+	mww 0xb8000020 0x20
+	mww 0xb80000cc 0xfffff
+
+	# UART GPIO programming
+	mww 0xb8040000 0xff30b
+	mww 0xb8040044 0x908
+	mww 0xb8040034 0x160000
+}