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Revert "ft2232_spi: Enhance csgpiol parameter for FT2232"

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This reverts commit ba6575de82f091b97ea0f2efcf2f79ef3739d64f.

Technically, the only thing that is wrong here is the lack of docu-
mentation (manpage update). However, as this change was succeeded by
a regressing fixup patch, it seems likely that the meaning of the
`csgpiol` parameter was just misunderstood and these changes were
not what the author intended.

Change-Id: I460237b9d275b1cd1d8a069f852d17dea393b14e
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/55694
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Nico Huber 2021-06-20 14:58:04 +02:00
parent c3f765917d
commit 2ac057cb39
1 changed files with 14 additions and 26 deletions
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32
ft2232_spi.c
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@ -88,17 +88,10 @@ static const struct dev_entry devs_ft2232spi[] = {
/* The variables cs_bits and pindir store the values for the "set data bits low byte" MPSSE command that
* sets the initial state and the direction of the I/O pins. The pin offsets are as follows:
* TCK/SK is bit 0.
* TDI/DO is bit 1.
* TDO/DI is bit 2.
* TMS/CS is bit 3.
* GPIOL0 is bit 4.
* GPIOL1 is bit 5.
* GPIOL2 is bit 6.
* GPIOL3 is bit 7.
*
* The pin signal direction bit offsets follow the same order; 0 means that
* pin at the matching bit index is an input, 1 means pin is an output.
* SCK is bit 0.
* DO is bit 1.
* DI is bit 2.
* CS is bit 3.
*
* The default values (set below in ft2232_spi_init) are used for most devices:
* value: 0x08 CS=high, DI=low, DO=low, SK=low
@ -459,25 +452,20 @@ static int ft2232_spi_init(void)
}
free(arg);
/* Allows setting multiple GPIOL states, for example: csgpiol=012 */
arg = extract_programmer_param("csgpiol");
if (arg) {
unsigned int ngpios = strlen(arg);
for (unsigned int i = 0; i <= ngpios; i++) {
int temp = arg[i] - '0';
if (ngpios == 0 || (ngpios != i && (temp < 0 || temp > 3))) {
msg_perr("Error: Invalid GPIOLs specified: \"%s\".\n"
"Valid values are numbers between 0 and 3. "
"Multiple GPIOLs can be specified.\n", arg);
char *endptr;
unsigned int temp = strtoul(arg, &endptr, 10);
if (*endptr || endptr == arg || temp > 3) {
msg_perr("Error: Invalid GPIOL specified: \"%s\".\n"
"Valid values are between 0 and 3.\n", arg);
free(arg);
return -2;
} else {
}
unsigned int pin = temp + 4;
cs_bits |= 1 << pin;
pindir |= 1 << pin;
}
}
}
free(arg);
msg_pdbg("Using device type %s %s ",