From 3f913efda03fd840cd526ef72e6f397c7da61bd7 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Tue, 9 Aug 2022 22:23:08 +0200
Subject: code layout

---
 fw/fe310/eos/dev/spi.c | 113 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 fw/fe310/eos/dev/spi.c

(limited to 'fw/fe310/eos/dev/spi.c')

diff --git a/fw/fe310/eos/dev/spi.c b/fw/fe310/eos/dev/spi.c
new file mode 100644
index 0000000..12549fc
--- /dev/null
+++ b/fw/fe310/eos/dev/spi.c
@@ -0,0 +1,113 @@
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "encoding.h"
+#include "platform.h"
+
+#include "eos.h"
+#include "msgq.h"
+#include "event.h"
+
+#include "board.h"
+
+#include "soc/interrupt.h"
+#include "soc/spi.h"
+
+#include "net.h"
+
+#include "spi.h"
+#include "spi_cfg.h"
+
+static uint8_t spi_dev;
+static uint8_t spi_lock;
+static uint16_t spi_div[EOS_SPI_MAX_DEV];
+
+int eos_spi_dev_init(uint8_t wakeup_cause) {
+    int i;
+
+    for (i=0; i<EOS_SPI_MAX_DEV; i++) {
+        spi_div[i] = spi_cfg[i].div;
+        if (!(spi_cfg[i].flags & SPI_DEV_FLAG_CSFLOAT) && (spi_cfg[i].cspin != -1)) {
+            GPIO_REG(GPIO_OUTPUT_VAL)   |=  (1 << spi_cfg[i].cspin);
+            GPIO_REG(GPIO_OUTPUT_EN)    |=  (1 << spi_cfg[i].cspin);
+        }
+    }
+
+    return EOS_OK;
+}
+
+int eos_spi_select(unsigned char dev) {
+    if (spi_lock) return EOS_ERR_BUSY;
+
+    if (spi_cfg[spi_dev].flags & SPI_DEV_FLAG_9BIT) {
+        eos_spi_enable();
+    } else {
+        if (spi_dev == EOS_SPI_DEV_NET) {
+            eos_net_stop();
+        } else {
+            eos_spi_stop();
+        }
+    }
+
+    spi_dev = dev;
+    if (spi_cfg[dev].flags & SPI_DEV_FLAG_9BIT) {
+        eos_spi_configure(spi_div[dev], spi_cfg[dev].csid, spi_cfg[dev].cspin, spi_cfg[dev].evt);
+        eos_spi_disable();
+    } else {
+        if (dev == EOS_SPI_DEV_NET) {
+            eos_net_start();
+        } else {
+            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;
+
+    if (spi_cfg[spi_dev].flags & SPI_DEV_FLAG_9BIT) {
+        eos_spi_enable();
+    } else {
+        eos_spi_stop();
+    }
+
+    spi_dev = EOS_SPI_DEV_NET;
+    eos_net_start();
+
+    return EOS_OK;
+}
+
+void eos_spi_dev_configure(unsigned char dev) {
+    eos_spi_configure(spi_div[dev], spi_cfg[dev].csid, spi_cfg[dev].cspin, spi_cfg[dev].evt);
+}
+
+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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