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Diffstat (limited to 'recipes-bsp/esp32spid/src/spi.c')
-rw-r--r--recipes-bsp/esp32spid/src/spi.c284
1 files changed, 0 insertions, 284 deletions
diff --git a/recipes-bsp/esp32spid/src/spi.c b/recipes-bsp/esp32spid/src/spi.c
deleted file mode 100644
index 5bd0718..0000000
--- a/recipes-bsp/esp32spid/src/spi.c
+++ /dev/null
@@ -1,284 +0,0 @@
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-
-#include <linux/spi/spidev.h>
-
-#include <gpiod.h>
-#include <pthread.h>
-
-#include "msgq.h"
-#include "tun.h"
-#include "spi.h"
-
-static pthread_t rtscts_thd;
-static pthread_t worker_thd;
-static pthread_t handler_thd;
-static pthread_mutex_t mutex;
-
-struct gpiod_line *gpio_rts, *gpio_cts;
-static struct gpiod_line_bulk gpio_rtscts;
-
-static MSGQueue spi_bufq;
-static unsigned char *spi_bufq_array[SPI_SIZE_BUFQ];
-
-static MSGQueue spi_msgq_in;
-static unsigned char *spi_msgq_in_array[SPI_SIZE_MSGQ];
-
-static MSGQueue spi_msgq_out;
-static unsigned char *spi_msgq_out_array[SPI_SIZE_MSGQ];
-
-static uint32_t spi_speed = 5000000;
-static int spi_fd;
-
-static int _spi_xchg(unsigned char *buffer) {
- int rv;
- uint16_t len_tx;
- uint16_t len_rx;
- struct spi_ioc_transfer tr;
-
- memset(&tr, 0, sizeof(tr));
- tr.tx_buf = (unsigned long)buffer;
- tr.rx_buf = (unsigned long)buffer;
- tr.speed_hz = spi_speed,
-
- len_tx = (uint16_t)buffer[1] << 8;
- len_tx |= (uint16_t)buffer[2] & 0xFF;
- if (len_tx > SPI_MTU) return SPI_ERR;
-
- len_tx += SPI_SIZE_HDR;
- // esp32 dma workaraund
- if (len_tx < 8) {
- len_tx = 8;
- } else if (len_tx % 4 != 0) {
- len_tx = (len_tx / 4 + 1) * 4;
- }
-
- tr.len = len_tx;
-
- pthread_mutex_lock(&mutex);
- rv = ioctl(spi_fd, SPI_IOC_MESSAGE(1), &tr);
- if (rv < 0) return SPI_ERR_MSG;
-
- len_rx = (uint16_t)buffer[1] << 8;
- len_rx |= (uint16_t)buffer[2] & 0xFF;
- if (len_rx > SPI_MTU) return SPI_ERR;
-
- len_rx += SPI_SIZE_HDR;
- if (len_rx > len_tx) {
- tr.tx_buf = (unsigned long)NULL;
- tr.rx_buf = (unsigned long)(buffer + len_tx);
-
- len_tx = len_rx - len_tx;
- // esp32 dma workaraund
- if (len_tx < 8) {
- len_tx = 8;
- } else if (len_tx % 4 != 0) {
- len_tx = (len_tx / 4 + 1) * 4;
- }
-
- tr.len = len_tx;
-
- pthread_mutex_lock(&mutex);
- rv = ioctl(spi_fd, SPI_IOC_MESSAGE(1), &tr);
- if (rv < 0) return SPI_ERR_MSG;
- }
-
- return SPI_OK;
-}
-
-static void *spi_rtscts_handler(void *arg) {
- MSGQueue *msgq_out = &spi_msgq_out;
- int i, rv;
- struct gpiod_line_bulk evt_lines;
- struct gpiod_line_event event;
-
- while (1) {
- rv = gpiod_line_event_wait_bulk(&gpio_rtscts, NULL, &evt_lines);
- if (rv < 0) continue;
-
- for (i=0; i<gpiod_line_bulk_num_lines(&evt_lines); i++) {
- struct gpiod_line *line;
-
- line = gpiod_line_bulk_get_line(&evt_lines, i);
- rv = gpiod_line_event_read(line, &event);
- if (rv || (event.event_type != GPIOD_LINE_EVENT_RISING_EDGE)) continue;
-
- switch (gpiod_line_offset(line)) {
- case SPI_GPIO_RTS:
- pthread_mutex_lock(&msgq_out->mutex);
- pthread_cond_signal(&msgq_out->cond);
- pthread_mutex_unlock(&msgq_out->mutex);
- break;
- case SPI_GPIO_CTS:
- pthread_mutex_unlock(&mutex);
- break;
- }
- }
- }
- return NULL;
-}
-
-static void *spi_worker(void *arg) {
- MSGQueue *bufq = &spi_bufq;
- MSGQueue *msgq_in = &spi_msgq_in;
- MSGQueue *msgq_out = &spi_msgq_out;
- int rv;
- unsigned char *buffer;
-
- while (1) {
- pthread_mutex_lock(&msgq_out->mutex);
- buffer = msgq_pop(msgq_out);
- if ((buffer == NULL) && (gpiod_line_get_value(gpio_rts) == 1)) {
- pthread_mutex_lock(&bufq->mutex);
- buffer = msgq_pop(bufq);
- pthread_mutex_unlock(&bufq->mutex);
- }
- if (buffer == NULL) {
- pthread_cond_wait(&msgq_out->cond, &msgq_out->mutex);
- buffer = msgq_pop(msgq_out);
- }
- pthread_mutex_unlock(&msgq_out->mutex);
- if (buffer) {
- rv = _spi_xchg(buffer);
- if (rv || (buffer[0] == 0)) {
- buffer[1] = 0;
- buffer[2] = 0;
- pthread_mutex_lock(&bufq->mutex);
- rv = msgq_push(bufq, buffer);
- pthread_mutex_unlock(&bufq->mutex);
- } else {
- pthread_mutex_lock(&msgq_in->mutex);
- rv = msgq_push(msgq_in, buffer);
- pthread_cond_signal(&msgq_in->cond);
- pthread_mutex_unlock(&msgq_in->mutex);
- }
- }
- }
- return NULL;
-}
-
-static void *spi_handler(void *arg) {
- MSGQueue *bufq = &spi_bufq;
- MSGQueue *msgq_in = &spi_msgq_in;
- unsigned char *buffer;
- unsigned char mtype;
- uint16_t len;
- int rv;
-
- while (1) {
- pthread_mutex_lock(&msgq_in->mutex);
- buffer = msgq_pop(msgq_in);
- if (buffer == NULL) {
- pthread_cond_wait(&msgq_in->cond, &msgq_in->mutex);
- buffer = msgq_pop(msgq_in);
- }
- pthread_mutex_unlock(&msgq_in->mutex);
- if (buffer) {
- mtype = buffer[0];
- len = (uint16_t)buffer[1] << 8;
- len |= (uint16_t)buffer[2] & 0xFF;
-
- switch (mtype) {
- case SPI_MTYPE_TUN:
- tun_write(buffer + SPI_SIZE_HDR, len);
- break;
- }
- buffer[0] = 0;
- buffer[1] = 0;
- buffer[2] = 0;
- pthread_mutex_lock(&bufq->mutex);
- rv = msgq_push(bufq, buffer);
- pthread_mutex_unlock(&bufq->mutex);
- }
- }
-}
-
-unsigned char *spi_alloc(void) {
- MSGQueue *bufq = &spi_bufq;
- unsigned char *ret;
-
- pthread_mutex_lock(&bufq->mutex);
- ret = msgq_pop(bufq);
- pthread_mutex_unlock(&bufq->mutex);
-
- return ret;
-}
-
-void spi_free(unsigned char *buffer) {
- MSGQueue *bufq = &spi_bufq;
-
- buffer[0] = 0;
- buffer[1] = 0;
- buffer[2] = 0;
- pthread_mutex_lock(&bufq->mutex);
- msgq_push(bufq, buffer);
- pthread_mutex_unlock(&bufq->mutex);
-}
-
-int spi_xchg(unsigned char mtype, unsigned char *buffer, uint16_t len) {
- int rv;
- MSGQueue *msgq_out = &spi_msgq_out;
-
- buffer[0] = mtype;
- buffer[1] = len >> 8;
- buffer[2] = len & 0xFF;
-
- pthread_mutex_lock(&msgq_out->mutex);
- rv = msgq_push(msgq_out, buffer);
- pthread_cond_signal(&msgq_out->cond);
- pthread_mutex_unlock(&msgq_out->mutex);
-
- return rv;
-}
-
-int spi_init(char *fname) {
- int rv, i;
- struct gpiod_chip *gpio_chip;
-
- spi_fd = open(fname, O_RDWR);
- if (spi_fd < 0) return SPI_ERR_OPEN;
-
- rv = ioctl(spi_fd, SPI_IOC_WR_MAX_SPEED_HZ, &spi_speed);
- if (rv == -1) return SPI_ERR;
-
- gpio_chip = gpiod_chip_open_by_name(SPI_GPIO_BANK);
- if (gpio_chip == NULL) return SPI_ERR;
-
- gpio_rts = gpiod_chip_get_line(gpio_chip, SPI_GPIO_RTS);
- gpio_cts = gpiod_chip_get_line(gpio_chip, SPI_GPIO_CTS);
- if ((gpio_rts == NULL) || (gpio_cts == NULL)) return SPI_ERR;
-
- gpiod_line_bulk_init(&gpio_rtscts);
- gpiod_line_bulk_add(&gpio_rtscts, gpio_rts);
- gpiod_line_bulk_add(&gpio_rtscts, gpio_cts);
- rv = gpiod_line_request_bulk_rising_edge_events(&gpio_rtscts, "rtscts");
- if (rv) return SPI_ERR;
-
- msgq_init(&spi_bufq, spi_bufq_array, SPI_SIZE_BUFQ);
- msgq_init(&spi_msgq_in, spi_msgq_in_array, SPI_SIZE_MSGQ);
- msgq_init(&spi_msgq_out, spi_msgq_out_array, SPI_SIZE_MSGQ);
- for (i=0; i<SPI_SIZE_BUFQ; i++) {
- msgq_push(&spi_bufq, malloc(SPI_SIZE_BUF));
- }
-
- rv = pthread_mutex_init(&mutex, NULL);
- rv = pthread_create(&rtscts_thd, NULL, spi_rtscts_handler, NULL);
- rv = pthread_create(&worker_thd, NULL, spi_worker, NULL);
- rv = pthread_create(&handler_thd, NULL, spi_handler, NULL);
-
- return SPI_OK;
-}
-
-int main(int argc, char *argv[]) {
- int rv;
-
- rv = spi_init("/dev/spidev0.0");
- if (rv) printf("SPI INIT ERR\n");
- rv = tun_init();
- if (rv) printf("TUN INIT ERR\n");
- tun_read(NULL);
-}
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