tcl: Add default hooks for STM32F0x

Keep clocks running in low power modes. Stop watchdogs from interfering
with the debug session. Set up PLL and increase clock at reset init.

Change-Id: I232d769d893d54e4ea9411c46c56b19587b69919
Signed-off-by: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Reviewed-on: http://openocd.zylin.com/2707
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

diff --git a/tcl/target/stm32f0x.cfg b/tcl/target/stm32f0x.cfg
index ff6d7f14a111ec35ff63c972ee438a37d90e476a..2b48cfce3e93c5bce0b3719229901ebbd1873ae3 100644 (file)
--- a/tcl/target/stm32f0x.cfg
+++ b/tcl/target/stm32f0x.cfg
@@ -4,6 +4,7 @@
 # stm32 devices support SWD transports only.
 #
 source [find target/swj-dp.tcl]
+source [find mem_helper.tcl]
 
 if { [info exists CHIPNAME] } {
    set _CHIPNAME $CHIPNAME
@@ -53,3 +54,33 @@ if {![using_hla]} {
    # perform a soft reset
    cortex_m reset_config sysresetreq
 }
+
+proc stm32f0x_default_reset_start {} {
+       # Reset clock is HSI (8 MHz)
+       adapter_khz 1000
+}
+
+proc stm32f0x_default_examine_end {} {
+       # Enable debug during low power modes (uses more power)
+       mmw 0x40015804 0x00000006 0 ;# DBGMCU_CR |= DBG_STANDBY | DBG_STOP
+
+       # Stop watchdog counters during halt
+       mmw 0x40015808 0x00001800 0 ;# DBGMCU_APB1_FZ |= DBG_IWDG_STOP | DBG_WWDG_STOP
+}
+
+proc stm32f0x_default_reset_init {} {
+       # Configure PLL to boost clock to HSI x 6 (48 MHz)
+       mww 0x40021004 0x00100000   ;# RCC_CFGR = PLLMUL[2]
+       mmw 0x40021000 0x01000000 0 ;# RCC_CR[31:16] |= PLLON
+       mww 0x40022000 0x00000011   ;# FLASH_ACR = PRFTBE | LATENCY[0]
+       sleep 10                    ;# Wait for PLL to lock
+       mmw 0x40021004 0x00000002 0 ;# RCC_CFGR |= SW[1]
+
+       # Boost JTAG frequency
+       adapter_khz 8000
+}
+
+# Default hooks
+$_TARGETNAME configure -event examine-end { stm32f0x_default_examine_end }
+$_TARGETNAME configure -event reset-start { stm32f0x_default_reset_start }
+$_TARGETNAME configure -event reset-init { stm32f0x_default_reset_init }