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spi master: lock APB frequency while in transaction

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This commit is contained in:
Ivan Grokhotkov 2017-09-24 14:59:15 +08:00
parent 330b6bd668
commit e4616588b7
1 changed files with 26 additions and 0 deletions
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26
components/driver/spi_master.c
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@ -47,6 +47,7 @@ queue and re-enabling the interrupt will trigger the interrupt again, which can
#include "esp_intr_alloc.h"
#include "esp_log.h"
#include "esp_err.h"
#include "esp_pm.h"
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"
#include "freertos/xtensa_api.h"
@ -84,6 +85,9 @@ typedef struct {
bool no_gpio_matrix;
int dma_chan;
int max_transfer_sz;
#ifdef CONFIG_PM_ENABLE
esp_pm_lock_handle_t pm_lock;
#endif
} spi_host_t;
struct spi_device_t {
@ -129,6 +133,13 @@ esp_err_t spi_bus_initialize(spi_host_device_t host, const spi_bus_config_t *bus
spihost[host]=malloc(sizeof(spi_host_t));
if (spihost[host]==NULL) goto nomem;
memset(spihost[host], 0, sizeof(spi_host_t));
#ifdef CONFIG_PM_ENABLE
esp_err_t err = esp_pm_lock_create(ESP_PM_APB_FREQ_MAX, 0, "spi_master",
&spihost[host]->pm_lock);
if (err != ESP_OK) {
goto nomem;
}
#endif //CONFIG_PM_ENABLE
spicommon_bus_initialize_io(host, bus_config, dma_chan, SPICOMMON_BUSFLAG_MASTER|SPICOMMON_BUSFLAG_QUAD, &native);
spihost[host]->no_gpio_matrix=native;
@ -180,6 +191,11 @@ nomem:
if (spihost[host]) {
free(spihost[host]->dmadesc_tx);
free(spihost[host]->dmadesc_rx);
#ifdef CONFIG_PM_ENABLE
if (spihost[host]->pm_lock) {
esp_pm_lock_delete(spihost[host]->pm_lock);
}
#endif
}
free(spihost[host]);
spicommon_periph_free(host);
@ -199,6 +215,9 @@ esp_err_t spi_bus_free(spi_host_device_t host)
if ( spihost[host]->dma_chan > 0 ) {
spicommon_dma_chan_free ( spihost[host]->dma_chan );
}
#ifdef CONFIG_PM_ENABLE
esp_pm_lock_delete(spihost[host]->pm_lock);
#endif
spihost[host]->hw->slave.trans_inten=0;
spihost[host]->hw->slave.trans_done=0;
esp_intr_free(spihost[host]->intr);
@ -412,6 +431,10 @@ static void IRAM_ATTR spi_intr(void *arg)
if (i==NO_CS) {
//No packet waiting. Disable interrupt.
esp_intr_disable(host->intr);
#ifdef CONFIG_PM_ENABLE
//Release APB frequency lock
esp_pm_lock_release(host->pm_lock);
#endif
} else {
host->hw->slave.trans_done=0; //clear int bit
//We have a transaction. Send it.
@ -649,6 +672,9 @@ esp_err_t spi_device_queue_trans(spi_device_handle_t handle, spi_transaction_t *
// else use the original buffer (forced-conversion) or assign to NULL
trans_buf.buffer_to_send = (uint32_t*)txdata;
}
#ifdef CONFIG_PM_ENABLE
esp_pm_lock_acquire(handle->host->pm_lock);
#endif
r=xQueueSend(handle->trans_queue, (void*)&trans_buf, ticks_to_wait);
if (!r) return ESP_ERR_TIMEOUT;