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rayer_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: Idde4557d89f80fe5d5884ce6c8cdf538ad2e5d68
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/54998
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Anastasia Klimchuk 2021-05-27 11:12:44 +10:00 committed by Edward O'Callaghan
parent f7b0674266
commit 38c133438c
1 changed files with 93 additions and 40 deletions
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133
rayer_spi.c
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@ -31,11 +31,6 @@
#include "programmer.h"
#include "hwaccess.h"
static uint16_t lpt_iobase;
/* Cached value of last byte sent. */
static uint8_t lpt_outbyte;
/* We have two sets of pins, out and in. The numbers for both sets are
* independent and are bitshift values, not real pin numbers.
* Default settings are for the RayeR hardware.
@ -53,10 +48,18 @@ struct rayer_pinout {
uint8_t sck_bit;
uint8_t mosi_bit;
uint8_t miso_bit;
void (*preinit)(const void *);
void (*preinit)(void *);
int (*shutdown)(void *);
};
struct rayer_spi_data {
uint16_t lpt_iobase;
/* Cached value of last byte sent. */
uint8_t lpt_outbyte;
const struct rayer_pinout *pinout;
};
static const struct rayer_pinout rayer_spipgm = {
.cs_bit = 5,
.sck_bit = 6,
@ -64,18 +67,26 @@ static const struct rayer_pinout rayer_spipgm = {
.miso_bit = 6,
};
static void dlc5_preinit(const void *data) {
static void dlc5_preinit(void *spi_data)
{
struct rayer_spi_data *data = spi_data;
msg_pdbg("dlc5_preinit\n");
/* Assert pin 6 to receive MISO. */
lpt_outbyte |= (1<<4);
OUTB(lpt_outbyte, lpt_iobase);
data->lpt_outbyte |= (1<<4);
OUTB(data->lpt_outbyte, data->lpt_iobase);
}
static int dlc5_shutdown(void *data) {
static int dlc5_shutdown(void *spi_data)
{
struct rayer_spi_data *data = spi_data;
msg_pdbg("dlc5_shutdown\n");
/* De-assert pin 6 to force MISO low. */
lpt_outbyte &= ~(1<<4);
OUTB(lpt_outbyte, lpt_iobase);
data->lpt_outbyte &= ~(1<<4);
OUTB(data->lpt_outbyte, data->lpt_iobase);
free(data);
return 0;
}
@ -88,16 +99,24 @@ static const struct rayer_pinout xilinx_dlc5 = {
.shutdown = dlc5_shutdown,
};
static void byteblaster_preinit(const void *data){
static void byteblaster_preinit(void *spi_data)
{
struct rayer_spi_data *data = spi_data;
msg_pdbg("byteblaster_preinit\n");
/* Assert #EN signal. */
OUTB(2, lpt_iobase + 2 );
OUTB(2, data->lpt_iobase + 2 );
}
static int byteblaster_shutdown(void *data){
static int byteblaster_shutdown(void *spi_data)
{
struct rayer_spi_data *data = spi_data;
msg_pdbg("byteblaster_shutdown\n");
/* De-Assert #EN signal. */
OUTB(0, lpt_iobase + 2 );
OUTB(0, data->lpt_iobase + 2 );
free(data);
return 0;
}
@ -110,18 +129,26 @@ static const struct rayer_pinout altera_byteblastermv = {
.shutdown = byteblaster_shutdown,
};
static void stk200_preinit(const void *data) {
static void stk200_preinit(void *spi_data)
{
struct rayer_spi_data *data = spi_data;
msg_pdbg("stk200_init\n");
/* Assert #EN signals, set LED signal. */
lpt_outbyte = (1 << 6) ;
OUTB(lpt_outbyte, lpt_iobase);
data->lpt_outbyte = (1 << 6) ;
OUTB(data->lpt_outbyte, data->lpt_iobase);
}
static int stk200_shutdown(void *data) {
static int stk200_shutdown(void *spi_data)
{
struct rayer_spi_data *data = spi_data;
msg_pdbg("stk200_shutdown\n");
/* Assert #EN signals, clear LED signal. */
lpt_outbyte = (1 << 2) | (1 << 3);
OUTB(lpt_outbyte, lpt_iobase);
data->lpt_outbyte = (1 << 2) | (1 << 3);
OUTB(data->lpt_outbyte, data->lpt_iobase);
free(data);
return 0;
}
@ -158,38 +185,49 @@ static const struct rayer_programmer rayer_spi_types[] = {
{0},
};
static const struct rayer_pinout *pinout = NULL;
static void rayer_bitbang_set_cs(int val, void *spi_data)
{
lpt_outbyte &= ~(1 << pinout->cs_bit);
lpt_outbyte |= (val << pinout->cs_bit);
OUTB(lpt_outbyte, lpt_iobase);
struct rayer_spi_data *data = spi_data;
data->lpt_outbyte &= ~(1 << data->pinout->cs_bit);
data->lpt_outbyte |= (val << data->pinout->cs_bit);
OUTB(data->lpt_outbyte, data->lpt_iobase);
}
static void rayer_bitbang_set_sck(int val, void *spi_data)
{
lpt_outbyte &= ~(1 << pinout->sck_bit);
lpt_outbyte |= (val << pinout->sck_bit);
OUTB(lpt_outbyte, lpt_iobase);
struct rayer_spi_data *data = spi_data;
data->lpt_outbyte &= ~(1 << data->pinout->sck_bit);
data->lpt_outbyte |= (val << data->pinout->sck_bit);
OUTB(data->lpt_outbyte, data->lpt_iobase);
}
static void rayer_bitbang_set_mosi(int val, void *spi_data)
{
lpt_outbyte &= ~(1 << pinout->mosi_bit);
lpt_outbyte |= (val << pinout->mosi_bit);
OUTB(lpt_outbyte, lpt_iobase);
struct rayer_spi_data *data = spi_data;
data->lpt_outbyte &= ~(1 << data->pinout->mosi_bit);
data->lpt_outbyte |= (val << data->pinout->mosi_bit);
OUTB(data->lpt_outbyte, data->lpt_iobase);
}
static int rayer_bitbang_get_miso(void *spi_data)
{
struct rayer_spi_data *data = spi_data;
uint8_t tmp;
tmp = INB(lpt_iobase + 1) ^ 0x80; // bit.7 inverted
tmp = (tmp >> pinout->miso_bit) & 0x1;
tmp = INB(data->lpt_iobase + 1) ^ 0x80; // bit.7 inverted
tmp = (tmp >> data->pinout->miso_bit) & 0x1;
return tmp;
}
static int rayer_shutdown(void *spi_data)
{
free(spi_data);
return 0;
}
static const struct bitbang_spi_master bitbang_spi_master_rayer = {
.set_cs = rayer_bitbang_set_cs,
.set_sck = rayer_bitbang_set_sck,
@ -202,6 +240,9 @@ int rayer_spi_init(void)
{
const struct rayer_programmer *prog = rayer_spi_types;
char *arg = NULL;
struct rayer_pinout *pinout = NULL;
uint16_t lpt_iobase;
uint8_t lpt_outbyte;
/* Non-default port requested? */
arg = extract_programmer_param("iobase");
@ -260,12 +301,24 @@ int rayer_spi_init(void)
/* Get the initial value before writing to any line. */
lpt_outbyte = INB(lpt_iobase);
if (pinout->shutdown)
register_shutdown(pinout->shutdown, (void*)pinout);
if (pinout->preinit)
pinout->preinit(pinout);
struct rayer_spi_data *data = calloc(1, sizeof(*data));
if (!data) {
msg_perr("Unable to allocate space for SPI master data\n");
return 1;
}
data->pinout = pinout;
data->lpt_iobase = lpt_iobase;
data->lpt_outbyte = lpt_outbyte;
if (register_spi_bitbang_master(&bitbang_spi_master_rayer, NULL))
if (pinout->shutdown)
register_shutdown(pinout->shutdown, data);
else
register_shutdown(rayer_shutdown, data);
if (pinout->preinit)
pinout->preinit(data);
if (register_spi_bitbang_master(&bitbang_spi_master_rayer, data))
return 1;
return 0;