luminary: add peripheral reset script

[openocd.git] / tcl / target / stellaris.cfg

diff --git a/tcl/target/stellaris.cfg b/tcl/target/stellaris.cfg
index b985de0561cb5c0614bf2e94f2ec64d3d9de1143..7fef4ec21ce7dd532ae1078f9a5a1fb53fa45c1e 100644 (file)
--- a/tcl/target/stellaris.cfg
+++ b/tcl/target/stellaris.cfg
@@ -70,6 +70,65 @@ adapter_khz 500
 
 source [find mem_helper.tcl]
 
+proc reset_peripherals {family} {
+
+       source [find chip/ti/lm3s/lm3s.tcl]
+
+       echo "Resetting Core Peripherals"
+
+       # Disable the PLL and the system clock divider (nop if disabled)
+       mmw $SYSCTL_RCC 0 $SYSCTL_RCC_USESYSDIV
+       mmw $SYSCTL_RCC2 $SYSCTL_RCC2_BYPASS2 0
+
+       # RCC and RCC2 to their reset values
+       mww $SYSCTL_RCC [expr (0x078e3ad0 | ([mrw $SYSCTL_RCC] & $SYSCTL_RCC_MOSCDIS))]
+       mww $SYSCTL_RCC2 0x07806810
+       mww $SYSCTL_RCC 0x078e3ad1
+
+       # Reset the deep sleep clock configuration register
+       mww $SYSCTL_DSLPCLKCFG 0x07800000
+
+       # Reset the clock gating registers
+       mww $SYSCTL_RCGC0 0x00000040
+       mww $SYSCTL_RCGC1 0
+       mww $SYSCTL_RCGC2 0
+       mww $SYSCTL_SCGC0 0x00000040
+       mww $SYSCTL_SCGC1 0
+       mww $SYSCTL_SCGC2 0
+       mww $SYSCTL_DCGC0 0x00000040
+       mww $SYSCTL_DCGC1 0
+       mww $SYSCTL_DCGC2 0
+
+       # Reset the remaining SysCtl registers
+       mww $SYSCTL_PBORCTL 0
+       mww $SYSCTL_IMC 0
+       mww $SYSCTL_GPIOHBCTL 0
+       mww $SYSCTL_MOSCCTL 0
+       mww $SYSCTL_PIOSCCAL 0
+       mww $SYSCTL_I2SMCLKCFG 0
+
+       # Reset the peripherals
+       mww $SYSCTL_SRCR0 0xffffffff
+       mww $SYSCTL_SRCR1 0xffffffff
+       mww $SYSCTL_SRCR2 0xffffffff
+       mww $SYSCTL_SRCR0 0
+       mww $SYSCTL_SRCR1 0
+       mww $SYSCTL_SRCR2 0
+
+       # Clear any pending SysCtl interrupts
+       mww $SYSCTL_MISC 0xffffffff
+
+       # Wait for any pending flash operations to complete
+       while {[expr [mrw $FLASH_FMC] & 0xffff] != 0} { sleep 1 }
+       while {[expr [mrw $FLASH_FMC2] & 0xffff] != 0} { sleep 1 }
+
+       # Reset the flash controller registers
+       mww $FLASH_FMA 0
+       mww $FLASH_FCIM 0
+       mww $FLASH_FCMISC 0xffffffff
+       mww $FLASH_FWBVAL 0
+}
+
 $_TARGETNAME configure -event reset-start {
        adapter_khz 500
 
@@ -99,12 +158,14 @@ $_TARGETNAME configure -event reset-start {
                cortex_m3 reset_config sysresetreq
        } else {
                # Tempest and newer default to using NVIC VECTRESET
-               # this does mean a reset-init event handler is required to reset
-               # any peripherals
+               # peripherals will need reseting manually, see proc reset_peripherals
                cortex_m3 reset_config vectreset
+
+               # reset peripherals, based on code in
+               # http://www.ti.com/lit/er/spmz573a/spmz573a.pdf
+               reset_peripherals $device_class
        }
 }
 
 # flash configuration ... autodetects sizes, autoprobed
 flash bank $_CHIPNAME.flash stellaris 0 0 0 0 $_TARGETNAME
-