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bitbang_spi.c: Pass spi data into bitbang_spi_master functions

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BUG=b:185191942
TEST=builds

Change-Id: I90a340aeb9ed70605f5963aa66ee913d22bff865
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/54992
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
This commit is contained in:
Anastasia Klimchuk
2021-05-26 10:07:59 +10:00
committed by Edward O'Callaghan
parent 5f5eaeb7fa
commit 848bf9daa9
1 changed files with 36 additions and 34 deletions
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70
bitbang_spi.c
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@ -22,74 +22,76 @@
#include "spi.h"
/* Note that CS# is active low, so val=0 means the chip is active. */
static void bitbang_spi_set_cs(const struct bitbang_spi_master * const master, int val)
static void bitbang_spi_set_cs(const struct bitbang_spi_master * const master, int val, void *spi_data)
{
master->set_cs(val, NULL);
master->set_cs(val, spi_data);
}
static void bitbang_spi_set_sck(const struct bitbang_spi_master * const master, int val)
static void bitbang_spi_set_sck(const struct bitbang_spi_master * const master, int val, void *spi_data)
{
master->set_sck(val, NULL);
master->set_sck(val, spi_data);
}
static void bitbang_spi_request_bus(const struct bitbang_spi_master * const master)
static void bitbang_spi_request_bus(const struct bitbang_spi_master * const master, void *spi_data)
{
if (master->request_bus)
master->request_bus(NULL);
master->request_bus(spi_data);
}
static void bitbang_spi_release_bus(const struct bitbang_spi_master * const master)
static void bitbang_spi_release_bus(const struct bitbang_spi_master * const master, void *spi_data)
{
if (master->release_bus)
master->release_bus(NULL);
master->release_bus(spi_data);
}
static void bitbang_spi_set_sck_set_mosi(const struct bitbang_spi_master * const master, int sck, int mosi)
static void bitbang_spi_set_sck_set_mosi(const struct bitbang_spi_master * const master, int sck, int mosi,
void *spi_data)
{
if (master->set_sck_set_mosi) {
master->set_sck_set_mosi(sck, mosi, NULL);
master->set_sck_set_mosi(sck, mosi, spi_data);
return;
}
master->set_sck(sck, NULL);
master->set_mosi(mosi, NULL);
master->set_sck(sck, spi_data);
master->set_mosi(mosi, spi_data);
}
static int bitbang_spi_set_sck_get_miso(const struct bitbang_spi_master * const master, int sck)
static int bitbang_spi_set_sck_get_miso(const struct bitbang_spi_master * const master, int sck,
void *spi_data)
{
if (master->set_sck_get_miso)
return master->set_sck_get_miso(sck, NULL);
return master->set_sck_get_miso(sck, spi_data);
master->set_sck(sck, NULL);
return master->get_miso(NULL);
master->set_sck(sck, spi_data);
return master->get_miso(spi_data);
}
static uint8_t bitbang_spi_read_byte(const struct bitbang_spi_master *master)
static uint8_t bitbang_spi_read_byte(const struct bitbang_spi_master *master, void *spi_data)
{
uint8_t ret = 0;
int i;
for (i = 7; i >= 0; i--) {
if (i == 0)
bitbang_spi_set_sck_set_mosi(master, 0, 0);
bitbang_spi_set_sck_set_mosi(master, 0, 0, spi_data);
else
bitbang_spi_set_sck(master, 0);
bitbang_spi_set_sck(master, 0, spi_data);
programmer_delay(master->half_period);
ret <<= 1;
ret |= bitbang_spi_set_sck_get_miso(master, 1);
ret |= bitbang_spi_set_sck_get_miso(master, 1, spi_data);
programmer_delay(master->half_period);
}
return ret;
}
static void bitbang_spi_write_byte(const struct bitbang_spi_master *master, uint8_t val)
static void bitbang_spi_write_byte(const struct bitbang_spi_master *master, uint8_t val, void *spi_data)
{
int i;
for (i = 7; i >= 0; i--) {
bitbang_spi_set_sck_set_mosi(master, 0, (val >> i) & 1);
bitbang_spi_set_sck_set_mosi(master, 0, (val >> i) & 1, spi_data);
programmer_delay(master->half_period);
bitbang_spi_set_sck(master, 1);
bitbang_spi_set_sck(master, 1, spi_data);
programmer_delay(master->half_period);
}
}
@ -112,19 +114,19 @@ static int bitbang_spi_send_command(const struct flashctx *flash,
* Requesting and releasing the SPI bus is handled in here to allow the
* programmer to use its own SPI engine for native accesses.
*/
bitbang_spi_request_bus(master);
bitbang_spi_set_cs(master, 0);
bitbang_spi_request_bus(master, data->spi_data);
bitbang_spi_set_cs(master, 0, data->spi_data);
for (i = 0; i < writecnt; i++)
bitbang_spi_write_byte(master, writearr[i]);
bitbang_spi_write_byte(master, writearr[i], data->spi_data);
for (i = 0; i < readcnt; i++)
readarr[i] = bitbang_spi_read_byte(master);
readarr[i] = bitbang_spi_read_byte(master, data->spi_data);
bitbang_spi_set_sck(master, 0);
bitbang_spi_set_sck(master, 0, data->spi_data);
programmer_delay(master->half_period);
bitbang_spi_set_cs(master, 1);
bitbang_spi_set_cs(master, 1, data->spi_data);
programmer_delay(master->half_period);
/* FIXME: Run bitbang_spi_release_bus here or in programmer init? */
bitbang_spi_release_bus(master);
bitbang_spi_release_bus(master, data->spi_data);
return 0;
}
@ -169,12 +171,12 @@ int register_spi_bitbang_master(const struct bitbang_spi_master *master, void *s
register_shutdown(bitbang_spi_shutdown, data);
/* Only mess with the bus if we're sure nobody else uses it. */
bitbang_spi_request_bus(master);
bitbang_spi_set_cs(master, 1);
bitbang_spi_set_sck_set_mosi(master, 0, 0);
bitbang_spi_request_bus(master, spi_data);
bitbang_spi_set_cs(master, 1, spi_data);
bitbang_spi_set_sck_set_mosi(master, 0, 0, spi_data);
/* FIXME: Release SPI bus here and request it again for each command or
* don't release it now and only release it on programmer shutdown?
*/
bitbang_spi_release_bus(master);
bitbang_spi_release_bus(master, spi_data);
return 0;
}