From 5c4ad4969514b82285ef37922f7acf61600c70de Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Thu, 8 Apr 2021 04:03:03 +0200
Subject: reintrodiced spi_dev

---
 fw/fe310/eos/spi_dev.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 fw/fe310/eos/spi_dev.c

(limited to 'fw/fe310/eos/spi_dev.c')

diff --git a/fw/fe310/eos/spi_dev.c b/fw/fe310/eos/spi_dev.c
new file mode 100644
index 0000000..d279faf
--- /dev/null
+++ b/fw/fe310/eos/spi_dev.c
@@ -0,0 +1,89 @@
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "encoding.h"
+#include "platform.h"
+
+#include "eos.h"
+#include "msgq.h"
+#include "interrupt.h"
+#include "event.h"
+
+#include "board.h"
+
+#include "net.h"
+#include "spi.h"
+#include "spi_priv.h"
+#include "spi_cfg.h"
+#include "spi_dev.h"
+
+static uint8_t spi_dev;
+static uint8_t spi_lock;
+static uint16_t spi_div[EOS_SPI_MAX_DEV];
+
+void eos_spi_dev_init(void) {
+    int i;
+
+    for (i=0; i<EOS_SPI_MAX_DEV; i++) {
+        spi_div[i] = spi_cfg[i].div;
+        if (spi_cfg[i].csid == SPI_CSID_NONE) {
+            GPIO_REG(GPIO_INPUT_EN)     &= ~(1 << spi_cfg[i].cspin);
+            GPIO_REG(GPIO_OUTPUT_EN)    |=  (1 << spi_cfg[i].cspin);
+            GPIO_REG(GPIO_PULLUP_EN)    &= ~(1 << spi_cfg[i].cspin);
+            GPIO_REG(GPIO_OUTPUT_XOR)   &= ~(1 << spi_cfg[i].cspin);
+            GPIO_REG(GPIO_OUTPUT_VAL)   |=  (1 << spi_cfg[i].cspin);
+        }
+    }
+}
+
+int eos_spi_select(unsigned char dev) {
+    if (dev == EOS_SPI_DEV_NET) return EOS_ERR;
+    if (spi_dev != EOS_SPI_DEV_NET) return EOS_ERR;
+
+    eos_net_stop();
+
+    spi_dev = dev;
+    eos_spi_start(spi_div[dev], spi_cfg[dev].csid, spi_cfg[dev].cspin, spi_cfg[dev].evt);
+
+    return EOS_OK;
+}
+
+int eos_spi_deselect(void) {
+    if (spi_lock) return EOS_ERR_BUSY;
+    if (spi_dev == EOS_SPI_DEV_NET) return EOS_ERR;
+
+    eos_spi_stop();
+
+    spi_dev = EOS_SPI_DEV_NET;
+    eos_net_start();
+
+    return EOS_OK;
+}
+
+uint8_t eos_spi_dev(void) {
+    return spi_dev;
+}
+
+uint16_t eos_spi_div(unsigned char dev) {
+    return spi_div[dev];
+}
+
+uint8_t eos_spi_csid(unsigned char dev) {
+    return spi_cfg[dev].csid;
+}
+
+uint8_t eos_spi_cspin(unsigned char dev) {
+    return spi_cfg[dev].cspin;
+}
+
+void eos_spi_lock(void) {
+    spi_lock = 1;
+}
+
+void eos_spi_unlock(void) {
+    spi_lock = 0;
+}
+
+void eos_spi_set_div(unsigned char dev, uint16_t div) {
+    spi_div[dev] = div;
+}
-- 
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