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max32xxx: Support for MAX32XXX devices.

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Adding flash programming support for Maxim Integrated MAX32XXX
devices.

Change-Id: I5b0f57a885f9d813240e4bc2d9f765b743e1cfc3
Signed-off-by: Kevin Gillespie <kgills@gmail.com>
Reviewed-on: http://openocd.zylin.com/3543
Tested-by: jenkins
Reviewed-by: Ismail H. KOSE <ihkose@gmail.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
This commit is contained in:
Kevin Gillespie
2016-07-14 13:00:23 -05:00
committed by Tomas Vanek
parent 404495b191
commit 6060545458
10 changed files with 1180 additions and 0 deletions
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70
contrib/loaders/flash/max32xxx/max32xxx.s Normal file
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/***************************************************************************
* Copyright (C) 2016 by Maxim Integrated *
* Kevin Gillespie <kevin.gillespie@maximintegrated.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
.text
.syntax unified
.cpu cortex-m3
.thumb
.thumb_func
/*
* Params :
* r0 = workarea start
* r1 = workarea end
* r2 = target address
* r3 = count (32bit words)
* r4 = pFLASH_CTRL_BASE
*
* Clobbered:
* r5 = FLASHWRITECMD
* r7 - rp
* r8 - wp, tmp
*/
write:
wait_fifo:
ldr r8, [r0, #0] /* read wp */
cmp r8, #0 /* abort if wp == 0 */
beq exit
ldr r7, [r0, #4] /* read rp */
cmp r7, r8 /* wait until rp != wp */
beq wait_fifo
mainloop:
str r2, [r4, #0x00] /* FLSH_ADDR - write address */
add r2, r2, #4 /* increment target address */
ldr r8, [r7], #4
str r8, [r4, #0x30] /* FLSH_DATA0 - write data */
ldr r5, [r4, #0x08] /* FLSH_CN */
orr r5, r5, #1
str r5, [r4, #0x08] /* FLSH_CN - enable write */
busy:
ldr r8, [r4, #0x08] /* FLSH_CN */
tst r8, #1
bne busy
cmp r7, r1 /* wrap rp at end of buffer */
it cs
addcs r7, r0, #8 /* skip loader args */
str r7, [r0, #4] /* store rp */
subs r3, r3, #1 /* decrement word count */
cbz r3, exit /* loop if not done */
b wait_fifo
exit:
bkpt