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pony_spi.c: Refactor singleton states into reentrant pattern

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Move global singleton states into a struct and store within
the bitbang_spi_master data field for the life-time of the driver.

This is one of the steps on the way to move spi_master data
memory management behind the initialisation API, for more
context see other patches under the same topic "register_master_api".

BUG=b:185191942
TEST=builds

Change-Id: Icf1125dadcdaa287ebe3c07ca95adb770bb19412
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/54997
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
This commit is contained in:
Anastasia Klimchuk 2021-05-27 09:46:23 +10:00 committed by Edward O'Callaghan
parent ab93e70387
commit f7b0674266
1 changed files with 49 additions and 28 deletions
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77
pony_spi.c
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@ -49,16 +49,20 @@ enum pony_type {
TYPE_AJAWE
};
/* Pins for master->slave direction */
static int pony_negate_cs = 1;
static int pony_negate_sck = 0;
static int pony_negate_mosi = 0;
/* Pins for slave->master direction */
static int pony_negate_miso = 0;
struct pony_spi_data {
/* Pins for master->slave direction */
int negate_cs;
int negate_sck;
int negate_mosi;
/* Pins for slave->master direction */
int negate_miso;
};
static void pony_bitbang_set_cs(int val, void *spi_data)
{
if (pony_negate_cs)
struct pony_spi_data *data = spi_data;
if (data->negate_cs)
val ^= 1;
sp_set_pin(PIN_TXD, val);
@ -66,7 +70,9 @@ static void pony_bitbang_set_cs(int val, void *spi_data)
static void pony_bitbang_set_sck(int val, void *spi_data)
{
if (pony_negate_sck)
struct pony_spi_data *data = spi_data;
if (data->negate_sck)
val ^= 1;
sp_set_pin(PIN_RTS, val);
@ -74,7 +80,9 @@ static void pony_bitbang_set_sck(int val, void *spi_data)
static void pony_bitbang_set_mosi(int val, void *spi_data)
{
if (pony_negate_mosi)
struct pony_spi_data *data = spi_data;
if (data->negate_mosi)
val ^= 1;
sp_set_pin(PIN_DTR, val);
@ -82,9 +90,10 @@ static void pony_bitbang_set_mosi(int val, void *spi_data)
static int pony_bitbang_get_miso(void *spi_data)
{
struct pony_spi_data *data = spi_data;
int tmp = sp_get_pin(PIN_CTS);
if (pony_negate_miso)
if (data->negate_miso)
tmp ^= 1;
return tmp;
@ -107,6 +116,7 @@ static int pony_spi_shutdown(void *data)
else
msg_pdbg("Pony SPI shutdown completed.\n");
free(data);
return ret;
}
@ -119,6 +129,16 @@ int pony_spi_init(void)
int have_device = 0;
int have_prog = 0;
struct pony_spi_data *data = calloc(1, sizeof(*data));
if (!data) {
msg_perr("Unable to allocate space for SPI master data\n");
return 1;
}
data->negate_cs = 1;
data->negate_sck = 0;
data->negate_mosi = 0;
data->negate_miso = 0;
/* The parameter is in format "dev=/dev/device,type=serbang" */
arg = extract_programmer_param("dev");
if (arg && strlen(arg)) {
@ -127,8 +147,9 @@ int pony_spi_init(void)
free(arg);
return 1;
}
if (register_shutdown(pony_spi_shutdown, NULL) != 0) {
if (register_shutdown(pony_spi_shutdown, data) != 0) {
free(arg);
free(data);
serialport_shutdown(NULL);
return 1;
}
@ -165,25 +186,25 @@ int pony_spi_init(void)
*/
switch (type) {
case TYPE_AJAWE:
pony_negate_cs = 1;
pony_negate_sck = 1;
pony_negate_mosi = 1;
pony_negate_miso = 1;
data->negate_cs = 1;
data->negate_sck = 1;
data->negate_mosi = 1;
data->negate_miso = 1;
name = "AJAWe";
break;
case TYPE_SERBANG:
pony_negate_cs = 0;
pony_negate_sck = 0;
pony_negate_mosi = 0;
pony_negate_miso = 1;
data->negate_cs = 0;
data->negate_sck = 0;
data->negate_mosi = 0;
data->negate_miso = 1;
name = "serbang";
break;
default:
case TYPE_SI_PROG:
pony_negate_cs = 1;
pony_negate_sck = 0;
pony_negate_mosi = 0;
pony_negate_miso = 0;
data->negate_cs = 1;
data->negate_sck = 0;
data->negate_mosi = 0;
data->negate_miso = 0;
name = "SI-Prog";
break;
}
@ -192,9 +213,9 @@ int pony_spi_init(void)
/*
* Detect if there is a compatible hardware programmer connected.
*/
pony_bitbang_set_cs(1, NULL);
pony_bitbang_set_sck(1, NULL);
pony_bitbang_set_mosi(1, NULL);
pony_bitbang_set_cs(1, data);
pony_bitbang_set_sck(1, data);
pony_bitbang_set_mosi(1, data);
switch (type) {
case TYPE_AJAWE:
@ -224,8 +245,8 @@ int pony_spi_init(void)
return 1;
}
if (register_spi_bitbang_master(&bitbang_spi_master_pony, NULL)) {
if (register_spi_bitbang_master(&bitbang_spi_master_pony, data))
return 1;
}
return 0;
}