From 58f41971b1e801ad2fbcea08e5152afa2b18ca73 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Mon, 28 Jul 2025 23:27:12 +0200
Subject: sys logging added; power management reimplemented; bugfixes;

---
 fw/fe310/eos/dev/spi.c | 68 +++++++++++++++++++++++++++++---------------------
 1 file changed, 40 insertions(+), 28 deletions(-)

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

diff --git a/fw/fe310/eos/dev/spi.c b/fw/fe310/eos/dev/spi.c
index fef00e1..319816d 100644
--- a/fw/fe310/eos/dev/spi.c
+++ b/fw/fe310/eos/dev/spi.c
@@ -5,6 +5,7 @@
 #include "platform.h"
 
 #include "eos.h"
+#include "log.h"
 #include "msgq.h"
 #include "event.h"
 
@@ -13,33 +14,36 @@
 #include "soc/interrupt.h"
 #include "soc/spi.h"
 #include "soc/spi_priv.h"
+#include "soc/spi9bit.h"
 
 #include "net.h"
 #include "egpio.h"
+#include "egpio_priv.h"
 
 #include "spi.h"
 #include "spi_cfg.h"
 
-#ifdef EOS_DEBUG
-#include <stdio.h>
-#endif
-
 static unsigned char spi_dstack[EOS_SPI_MAX_DSTACK];
 static unsigned char spi_dstack_len;
-static uint16_t spi_div[EOS_SPI_MAX_DEV];
+static uint16_t spi_div[SPI_MAX_DEV];
 
 static uint8_t spi_dev(void) {
     return spi_dstack_len ? spi_dstack[spi_dstack_len - 1] : EOS_SPI_DEV_NET;
 }
 
-static void spi_stop(unsigned char dev) {
+static int spi_stop(unsigned char dev) {
     if (dev == EOS_SPI_DEV_NET) {
         eos_net_stop();
-    } else if (spi_cfg[dev].flags & SPI_DEV_FLAG_9BIT) {
-        eos_spi_enable();
     } else {
-        eos_spi_stop();
+        if (eos_spi_get_cs()) return EOS_ERR_BUSY;
+        if (spi_cfg[dev].flags & SPI_DEV_FLAG_9BIT) {
+            eos_spi9bit_stop();
+            eos_spi_enable();
+        } else {
+            eos_spi_stop();
+        }
     }
+    return EOS_OK;
 }
 
 static void spi_start(unsigned char dev) {
@@ -48,6 +52,7 @@ static void spi_start(unsigned char dev) {
     } else 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();
+        eos_spi9bit_start();
     } else {
         eos_spi_start(spi_div[dev], spi_cfg[dev].csid, spi_cfg[dev].cspin, spi_cfg[dev].evt);
     }
@@ -56,7 +61,8 @@ static void spi_start(unsigned char dev) {
 int eos_spi_dev_init(void) {
     int i;
 
-    for (i=0; i<EOS_SPI_MAX_DEV; i++) {
+    /* dev modules are responsibile for configuring cs gpio */
+    for (i=0; i<SPI_MAX_DEV; i++) {
         spi_div[i] = spi_cfg[i].div;
     }
 
@@ -71,14 +77,10 @@ int eos_spi_select(unsigned char dev) {
     int rv;
     int dsel;
 
-    if (eos_spi_cs_get()) rv = EOS_ERR_BUSY;
-    if (!rv && (spi_dstack_len == EOS_SPI_MAX_DSTACK)) rv = EOS_ERR_FULL;
-
-    if (rv) {
-#ifdef EOS_DEBUG
-        printf("SPI SELECT DEV:%d ERR:%d\n", dev, rv);
-#endif
-        return rv;
+    rv = EOS_OK;
+    if (spi_dstack_len == EOS_SPI_MAX_DSTACK) {
+        rv = EOS_ERR_FULL;
+        goto spi_select_fin;
     }
 
     dsel = 1;
@@ -87,13 +89,21 @@ int eos_spi_select(unsigned char dev) {
         dsel = 0;
     }
 
-    if (dsel) spi_stop(spi_dev());
+    if (dsel) {
+        rv = spi_stop(spi_dev());
+        if (rv) goto spi_select_fin;
+    }
 
     spi_dstack[spi_dstack_len] = dev;
     spi_dstack_len++;
 
     if (dsel) spi_start(dev);
 
+spi_select_fin:
+    if (rv) {
+        EOS_LOG(EOS_LOG_ERR, "SPI SELECT DEV:%d ERR:%d\n", dev, rv);
+        return rv;
+    }
     return EOS_OK;
 }
 
@@ -101,23 +111,25 @@ void eos_spi_deselect(void) {
     int rv;
     int dsel;
 
-    if (eos_spi_cs_get()) rv = EOS_ERR_BUSY;
-    if (!rv && (spi_dstack_len == 0)) rv = EOS_ERR_EMPTY;
-
-    if (rv) {
-#ifdef EOS_DEBUG
-        printf("SPI DESELECT ERR:%d\n", rv);
-#endif
-        return;
+    rv = EOS_OK;
+    if (spi_dstack_len == 0) {
+        rv = EOS_ERR_EMPTY;
+        goto spi_deselect_fin;
     }
 
     dsel = !(spi_dev() & EOS_SPI_DEV_FLAG_NDSEL);
-    if (dsel) spi_stop(spi_dev());
+    if (dsel) {
+        rv = spi_stop(spi_dev());
+        if (rv) goto spi_deselect_fin;
+    }
 
     spi_dstack_len--;
     spi_dstack[spi_dstack_len] = 0xff;
 
     if (dsel) spi_start(spi_dev());
+
+spi_deselect_fin:
+    if (rv) EOS_LOG(EOS_LOG_ERR, "SPI DESELECT ERR:%d\n", rv);
 }
 
 void eos_spi_dev_configure(unsigned char dev) {
-- 
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