static void completed(struct device *dev, int error)
{
struct spi_dw_config *info = dev->config->config_info;
struct spi_dw_data *spi = dev->driver_data;
if (error) {
goto out;
}
if (spi->fifo_diff ||
!((spi->tx_buf && !spi->tx_buf_len && !spi->rx_buf) ||
(spi->rx_buf && !spi->rx_buf_len && !spi->tx_buf) ||
(spi->tx_buf && !spi->tx_buf_len &&
spi->rx_buf && !spi->rx_buf_len))) {
return;
}
out:
spi->error = error;
/* Disabling interrupts */
write_imr(DW_SPI_IMR_MASK, info->regs);
/* Disabling the controller */
clear_bit_ssienr(info->regs);
_spi_control_cs(dev, 0);
DBG("SPI transaction completed %s error\n",
error ? "with" : "without");
device_sync_call_complete(&spi->sync);
}
int spi_dw_init(struct device *dev)
{
struct spi_dw_config *info = dev->config->config_info;
struct spi_dw_data *spi = dev->driver_data;
_clock_config(dev);
_clock_on(dev);
#ifndef CONFIG_SOC_QUARK_SE_SS
if (read_ssi_comp_version(info->regs) != DW_SSI_COMP_VERSION) {
_clock_off(dev);
return DEV_NOT_CONFIG;
}
#endif
dev->driver_api = &dw_spi_api;
info->config_func();
device_sync_call_init(&spi->sync);
_spi_config_cs(dev);
/* Masking interrupt and making sure controller is disabled */
write_imr(DW_SPI_IMR_MASK, info->regs);
clear_bit_ssienr(info->regs);
DBG("Designware SPI driver initialized on device: %p\n", dev);
return DEV_OK;
}
static void completed(struct device *dev, int error)
{
const struct spi_dw_config *info = dev->config->config_info;
struct spi_dw_data *spi = dev->driver_data;
if (error) {
goto out;
}
if (spi_context_tx_on(&spi->ctx) ||
spi_context_rx_on(&spi->ctx)) {
return;
}
out:
/* need to give time for FIFOs to drain before issuing more commands */
while (test_bit_sr_busy(info->regs)) {
}
/* Disabling interrupts */
write_imr(DW_SPI_IMR_MASK, info->regs);
/* Disabling the controller */
clear_bit_ssienr(info->regs);
spi_context_cs_control(&spi->ctx, false);
LOG_DBG("SPI transaction completed %s error",
error ? "with" : "without");
spi_context_complete(&spi->ctx, error);
}
static void completed(struct device *dev, int error)
{
const struct spi_dw_config *info = dev->config->config_info;
struct spi_dw_data *spi = dev->driver_data;
if (error) {
goto out;
}
/*
* There are several situations here.
* 1. spi_write w rx_buf - need last_tx && rx_buf_len zero to be done.
* 2. spi_write w/o rx_buf - only need to determine when write is done.
* 3. spi_read - need rx_buf_len zero.
*/
if (spi->tx_buf && spi->rx_buf) {
if (!spi->last_tx || spi->rx_buf_len) {
return;
}
} else if (spi->tx_buf) {
if (!spi->last_tx) {
return;
}
} else { /* or, spi->rx_buf!=0 */
if (spi->rx_buf_len) {
return;
}
}
out:
/* need to give time for FIFOs to drain before issuing more commands */
while (test_bit_sr_busy(info->regs)) {
}
spi->error = error;
/* Disabling interrupts */
write_imr(DW_SPI_IMR_MASK, info->regs);
/* Disabling the controller */
clear_bit_ssienr(info->regs);
_spi_control_cs(dev, 0);
SYS_LOG_DBG("SPI transaction completed %s error",
error ? "with" : "without");
k_sem_give(&spi->device_sync_sem);
}
int spi_dw_init(struct device *dev)
{
const struct spi_dw_config *info = dev->config->config_info;
struct spi_dw_data *spi = dev->driver_data;
_clock_config(dev);
_clock_on(dev);
info->config_func();
/* Masking interrupt and making sure controller is disabled */
write_imr(DW_SPI_IMR_MASK, info->regs);
clear_bit_ssienr(info->regs);
LOG_DBG("Designware SPI driver initialized on device: %p", dev);
spi_context_unlock_unconditionally(&spi->ctx);
return 0;
}
int spi_dw_init(struct device *dev)
{
const struct spi_dw_config *info = dev->config->config_info;
struct spi_dw_data *spi = dev->driver_data;
_clock_config(dev);
_clock_on(dev);
info->config_func();
k_sem_init(&spi->device_sync_sem, 0, UINT_MAX);
_spi_config_cs(dev);
/* Masking interrupt and making sure controller is disabled */
write_imr(DW_SPI_IMR_MASK, info->regs);
clear_bit_ssienr(info->regs);
SYS_LOG_DBG("Designware SPI driver initialized on device: %p", dev);
return 0;
}
