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ft2232_spi.c: Rename cs_bits to pinlvl

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Renames the variable cs_bits to pinlvl, to more accurately reflect its
role. pinlvl works in conjunction with pindir to specify GPIO pin state.

Signed-off-by: Alan Green <avg@google.com>
Change-Id: I53d1ccae8fa870f037b03762bec79fee1b7bad21
Reviewed-on: https://review.coreboot.org/c/flashrom/+/49780
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Alan Green 2021-01-21 09:48:25 +11:00 committed by Edward O'Callaghan
parent 3207844ec0
commit 180079632b
1 changed files with 12 additions and 12 deletions
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24
ft2232_spi.c
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@ -84,7 +84,7 @@ const struct dev_entry devs_ft2232spi[] = {
#define BITMODE_BITBANG_NORMAL 1
#define BITMODE_BITBANG_SPI 2
/* The variables cs_bits and pindir store the values for the "set data bits low byte" MPSSE command that
/* The variables pinlvl 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.
@ -102,7 +102,7 @@ const struct dev_entry devs_ft2232spi[] = {
* value: 0x08 CS=high, DI=low, DO=low, SK=low
* dir: 0x0b CS=output, DI=input, DO=output, SK=output
*/
static uint8_t cs_bits = 0x08;
static uint8_t pinlvl = 0x08;
static uint8_t pindir = 0x0b;
static struct ftdi_context ftdic_context;
@ -246,7 +246,7 @@ int ft2232_spi_init(void)
/* JTAGkey(2) needs to enable its output via Bit4 / GPIOL0
* value: 0x18 OE=high, CS=high, DI=low, DO=low, SK=low
* dir: 0x1b OE=output, CS=output, DI=input, DO=output, SK=output */
cs_bits = 0x18;
pinlvl = 0x18;
pindir = 0x1b;
} else if (!strcasecmp(arg, "picotap")) {
ft2232_vid = GOEPEL_VID;
@ -264,7 +264,7 @@ int ft2232_spi_init(void)
/* In its default configuration it is a jtagkey clone */
ft2232_type = FTDI_FT2232H_PID;
channel_count = 2;
cs_bits = 0x18;
pinlvl = 0x18;
pindir = 0x1b;
} else if (!strcasecmp(arg, "openmoko")) {
ft2232_vid = FIC_VID;
@ -277,7 +277,7 @@ int ft2232_spi_init(void)
/* arm-usb-ocd(-h) has an output buffer that needs to be enabled by pulling ADBUS4 low.
* value: 0x08 #OE=low, CS=high, DI=low, DO=low, SK=low
* dir: 0x1b #OE=output, CS=output, DI=input, DO=output, SK=output */
cs_bits = 0x08;
pinlvl = 0x08;
pindir = 0x1b;
} else if (!strcasecmp(arg, "arm-usb-tiny")) {
ft2232_vid = OLIMEX_VID;
@ -288,7 +288,7 @@ int ft2232_spi_init(void)
ft2232_type = OLIMEX_ARM_OCD_H_PID;
channel_count = 2;
/* See arm-usb-ocd */
cs_bits = 0x08;
pinlvl = 0x08;
pindir = 0x1b;
} else if (!strcasecmp(arg, "arm-usb-tiny-h")) {
ft2232_vid = OLIMEX_VID;
@ -381,7 +381,7 @@ int ft2232_spi_init(void)
return -2;
} else {
unsigned int pin = temp + 4;
cs_bits |= 1 << pin;
pinlvl |= 1 << pin;
pindir |= 1 << pin;
}
}
@ -398,11 +398,11 @@ int ft2232_spi_init(void)
unsigned int pin = i + 4;
switch (toupper(arg[i])) {
case 'H':
cs_bits |= 1 << pin;
pinlvl |= 1 << pin;
pindir |= 1 << pin;
break;
case 'L':
cs_bits &= ~(1 << pin);
pinlvl &= ~(1 << pin);
pindir |= 1 << pin;
break;
case 'Z':
@ -512,7 +512,7 @@ int ft2232_spi_init(void)
msg_pdbg("Set data bits\n");
buf[0] = SET_BITS_LOW;
buf[1] = cs_bits;
buf[1] = pinlvl;
buf[2] = pindir;
if (send_buf(ftdic, buf, 3)) {
ret = -8;
@ -569,7 +569,7 @@ static int ft2232_spi_send_command(const struct flashctx *flash,
*/
msg_pspew("Assert CS#\n");
buf[i++] = SET_BITS_LOW;
buf[i++] = ~ 0x08 & cs_bits; /* assert CS (3rd) bit only */
buf[i++] = ~ 0x08 & pinlvl; /* assert CS (3rd) bit only */
buf[i++] = pindir;
if (writecnt) {
@ -610,7 +610,7 @@ static int ft2232_spi_send_command(const struct flashctx *flash,
msg_pspew("De-assert CS#\n");
buf[i++] = SET_BITS_LOW;
buf[i++] = cs_bits;
buf[i++] = pinlvl;
buf[i++] = pindir;
ret = send_buf(ftdic, buf, i);
failed |= ret;