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fc-shell TCH DL handler: add support for CSD modes TCH DL capture mechanism in FC Tourmaline firmware has been extended to support CSD modes in addition to speech - add the necessary support on the host tools side. It needs to be noted that this mechanism in its present state does NOT provide the debug utility value that was sought: as we learned only after the code was implemented, TI's DSP has a misfeature in that the buffer we are reading (a_dd_0[]) is zeroed out when the IDS block is enabled, i.e., we are reading all zeros and not the real DL bits we were after. But since the code has already been written, we are keeping it - perhaps we can do some tests with IDS disabled.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 26 Nov 2024 06:27:43 +0000
parents 21eec7569eb8
children
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	.text
	.org	0

#if THUMB_ENTRY
	.code	16
	bx	pc
	nop
#endif
	.code	32

/* delay loop like OsmocomBB does */
	mov	r1, #0xa0000
1:	subs	r1, r1, #1
	bne	1b
/* enable the Calypso boot ROM */
	ldr	r1, reg_addr
	mov	r2, #0x0100
	strh	r2, [r1]
/* jump to it! */
	mov	pc, #0
reg_addr:
	.word	0xFFFFFB10

#if PAD_TO_1003
/*
 * The older and most familiar versions of C139/140 boot code expect the
 * signature bytes to be "1003" or greater, but a recently encountered
 * newer version expects them to be "1004" or greater instead.  As the
 * actual comparison check in all currently known boot code versions is
 * an inequality (the signature bytes in the downloaded image need to be
 * greater than or equal to the hard-coded reference values), always
 * putting "1004" in our compalstage image instead of "1003" should satisfy
 * all existing C1xx boot code versions, or at least all currently known
 * ones.  However, having an image named compalstage-1003.bin with the
 * corresponding -c 1003 loadtools option that is actually "1004" inside
 * feels a little "wrong" in some sense, while getting rid of the -c 1003
 * option would break old user instructions, hence let's go ahead and do the
 * silly exercise of building both "1003" and "1004" versions.
 */
	.org	0x3be0
#if MAGIC_1004
	.ascii	"1004"
#else
	.ascii	"1003"
#endif
#endif