From 0d9a111face4f3629bcae8e52af843792af3b453 Mon Sep 17 00:00:00 2001
From: "David A. Mellis" <d.mellis@arduino.cc>
Date: Thu, 13 Sep 2012 10:41:16 -0400
Subject: Moving into firmwares directory.

---
 firmwares/wifishield/wifiHD/src/nvram.c | 153 ++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 firmwares/wifishield/wifiHD/src/nvram.c

(limited to 'firmwares/wifishield/wifiHD/src/nvram.c')

diff --git a/firmwares/wifishield/wifiHD/src/nvram.c b/firmwares/wifishield/wifiHD/src/nvram.c
new file mode 100644
index 0000000..2c61c5f
--- /dev/null
+++ b/firmwares/wifishield/wifiHD/src/nvram.c
@@ -0,0 +1,153 @@
+/*! \page License
+ * Copyright (C) 2009, H&D Wireless AB All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. The name of H&D Wireless AB may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY H&D WIRELESS AB ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
+ * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <string.h>
+
+#include "compiler.h"
+#include "preprocessor.h"
+#include "board.h"
+#include "power_clocks_lib.h"
+#include "gpio.h"
+#include "spi.h"
+#include "conf_at45dbx.h"
+#include "at45dbx.h"
+#include <board_init.h>
+#include <nvram.h>
+
+
+static struct nvram {
+        uint8_t read;
+        void *data;
+        uint32_t len;
+        uint16_t off;
+} PRIV;
+
+int nvram_init(void)
+{
+        spi_options_t spiOptions = {
+                .reg          = AT45DBX_SPI_FIRST_NPCS,
+                .baudrate     = AT45DBX_SPI_MASTER_SPEED,
+                .bits         = AT45DBX_SPI_BITS,
+                .spck_delay   = 0,
+                .trans_delay  = 0,
+                .stay_act     = 1,
+                .spi_mode     = 0,
+                .modfdis      = 1
+        };
+    
+        at45dbx_init(spiOptions, FPBA_HZ);
+        return 0;
+}
+
+
+/**
+ * Invoked by at45dbx driver
+ *
+ */
+void at45dbx_read_multiple_sector_callback(const void *psector)
+{
+        struct nvram *priv = &PRIV;
+        const uint8_t *buf = psector;
+
+        if (!priv->read)
+                return;
+
+        memcpy(priv->data, buf + priv->off, priv->len);
+}
+
+
+/**
+ * Invoked by at45dbx driver
+ *
+ */
+void at45dbx_write_multiple_sector_callback(void *psector)
+{
+        struct nvram *priv = &PRIV;
+        uint8_t *buf = psector;
+        memcpy(buf + priv->off, priv->data, priv->len);
+}
+
+
+/**
+ * Write/read any number bytes into any offset of nor flash by taking care
+ * of cases where the length is not aligned to the sector size or where
+ * the addr is not aligned to the sector offsets.
+ *
+ */
+static int nvram_rw(uint32_t addr, void *data, uint16_t len, int write)
+{
+        struct nvram *priv = &PRIV;
+        priv->read = write ? 0 : 1;
+        
+        while (len) {
+                uint32_t sector = addr / AT45DBX_SECTOR_SIZE;
+                priv->data = data;
+                priv->off = addr % AT45DBX_SECTOR_SIZE;
+                priv->len = AT45DBX_SECTOR_SIZE;
+
+                if (len < AT45DBX_SECTOR_SIZE)
+                        priv->len = len;
+
+                if (priv->len > AT45DBX_SECTOR_SIZE - priv->off)
+                        priv->len = AT45DBX_SECTOR_SIZE - priv->off;
+
+                at45dbx_read_open(sector);
+                at45dbx_read_multiple_sector(1);
+                at45dbx_read_close();
+
+                if (write) {
+                        at45dbx_write_open(sector);
+                        at45dbx_write_multiple_sector(1);
+                        at45dbx_write_close();
+                }
+                
+                data += priv->len;
+                len -= priv->len;
+                addr += priv->len;
+        }
+        
+        return 0;
+}
+
+/**
+ * Write any number bytes into any offset of nor flash.
+ *
+ */
+int nvram_write(uint32_t addr, const void *data, uint32_t len)
+{
+        return nvram_rw(addr, (void *) data, len, 1);
+}
+
+
+/**
+ * Read any number bytes into any offset of nor flash.
+ *
+ */
+int nvram_read(uint32_t addr, void *data, uint32_t len)
+{
+        return nvram_rw(addr, data, len, 0);
+}
-- 
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