Hoernchen has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-asf4-dfu/+/39435?usp=email )

Change subject: errata 2.6.10 ......................................................................

errata 2.6.10

set wdt urow bits to ensure nvm cache is clear

Change-Id: Ifbc6a3dfe91462029fce50ed42f20440debaa552 --- M gcc/gcc/startup_same54.c M hpl/nvmctrl/hpl_nvmctrl.c M usb_flash_main.c 3 files changed, 26 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-asf4-dfu refs/changes/35/39435/1

diff --git a/gcc/gcc/startup_same54.c b/gcc/gcc/startup_same54.c index 7d8015e..b943e54 100644 --- a/gcc/gcc/startup_same54.c +++ b/gcc/gcc/startup_same54.c @@ -627,7 +627,7 @@ * \brief This is the code that gets called on processor reset. * To initialize the device, and call the main() routine. */ -void Reset_Handler(void) +void _Reset_Handler(void) { uint32_t *pSrc, *pDest;

@@ -668,6 +668,19 @@ ; }

+__attribute__((naked,noreturn)) void Reset_Handler(void) +{ +// errata 2.6.10, do not remove this, ever. +// WDT->CTRLA.reg = 0; + __asm volatile ( + "movs r0, #0\n" + "ldr r1, =0x40002000\n" + "strb r0, [r1]\n" + "bl _Reset_Handler\n" + ::: "r0", "r1", "memory" + ); +} + /** * \brief Default interrupt handler for unused IRQs. */ diff --git a/hpl/nvmctrl/hpl_nvmctrl.c b/hpl/nvmctrl/hpl_nvmctrl.c index 63f6145..05db578 100644 --- a/hpl/nvmctrl/hpl_nvmctrl.c +++ b/hpl/nvmctrl/hpl_nvmctrl.c @@ -74,6 +74,10 @@

ASSERT(device && (hw == NVMCTRL));

+ // errata 2.6.10, do not remove this, ever. + hri_nvmctrl_set_CTRLA_CACHEDIS1_bit(hw); + hri_nvmctrl_clear_CTRLA_CACHEDIS1_bit(hw); + device->hw = hw; ctrla = hri_nvmctrl_read_CTRLA_reg(hw); ctrla &= ~(NVMCTRL_CTRLA_CACHEDIS0 | NVMCTRL_CTRLA_CACHEDIS1 | NVMCTRL_CTRLA_PRM_Msk); diff --git a/usb_flash_main.c b/usb_flash_main.c index 518cf2d..b057d0a 100644 --- a/usb_flash_main.c +++ b/usb_flash_main.c @@ -131,6 +131,14 @@ str_to_usb_desc(sernr_buf, sizeof(sernr_buf), sernr_buf_descr, sizeof(sernr_buf_descr)); #endif

+ // errata 2.6.10, do not remove this, ever. + bool chiprev_lower_revG = ((DSU->DID.reg >> 8) & 0xf) < 0x6; + bool startup_wdt_inactive = _user_area_read_bits((void*)NVMCTRL_USER, 62, 1) != 1; + if (chiprev_lower_revG && startup_wdt_inactive) + { + _user_area_write_bits((void*)NVMCTRL_USER, 50, 0, 4); + _user_area_write_bits((void*)NVMCTRL_USER, 62, 1, 1); + }

// set bootprot bits for (15-13)=2 x8192 byte // hri_nvmctrl_write_CTRLB_reg(NVMCTRL, NVMCTRL_CTRLB_CMD_SBPDIS | NVMCTRL_CTRLB_CMDEX_KEY);