From a79d650d0df238b7286379ca5e11566eda3a2cfe Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Wed, 25 Apr 2018 10:32:28 +0200
Subject: bsp/mcf5206elite: Move nvram.c to bsps

This patch is a part of the BSP source reorganization.

Update #3285.
---
 bsps/m68k/mcf5206elite/nvram/nvram.c | 173 +++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100644 bsps/m68k/mcf5206elite/nvram/nvram.c

(limited to 'bsps')

diff --git a/bsps/m68k/mcf5206elite/nvram/nvram.c b/bsps/m68k/mcf5206elite/nvram/nvram.c
new file mode 100644
index 0000000000..d140272523
--- /dev/null
+++ b/bsps/m68k/mcf5206elite/nvram/nvram.c
@@ -0,0 +1,173 @@
+/*
+ * DS1307-based Non-Volatile memory device driver
+ *
+ * DS1307 chip is a I2C Real-Time Clock. It contains 56 bytes of
+ * non-volatile RAM storage. This driver provide file-like interface to
+ * this memory.
+ *
+ * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia
+ * Author: Victor V. Vengerov <vvv@oktet.ru>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ *
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#include <rtems.h>
+#include <rtems/libio.h>
+#include <errno.h>
+#include <string.h>
+#include <bsp.h>
+#include <nvram.h>
+#include <i2c.h>
+#include <ds1307.h>
+
+/* nvram_driver_initialize --
+ *     Non-volatile memory device driver initialization.
+ */
+rtems_device_driver
+nvram_driver_initialize(rtems_device_major_number major,
+                        rtems_device_minor_number minor,
+                        void *arg)
+{
+    rtems_status_code sc;
+    i2c_message_status status;
+    i2c_bus_number bus = DS1307_I2C_BUS_NUMBER;
+    i2c_address    addr = DS1307_I2C_ADDRESS;
+    int try = 0;
+    do {
+        status = i2c_wrbyte(bus, addr, 0);
+        if (status == I2C_NO_DEVICE)
+            break;
+        try++;
+    } while ((try < 15) && (status != I2C_SUCCESSFUL));
+
+    if (status == I2C_SUCCESSFUL)
+    {
+        sc = rtems_io_register_name("/dev/nvram", major, 0);
+        if (sc != RTEMS_SUCCESSFUL)
+        {
+            errno = EIO;
+            return RTEMS_UNSATISFIED;
+        }
+        else
+            return RTEMS_SUCCESSFUL;
+    }
+    else
+    {
+        errno = ENODEV;
+        return RTEMS_UNSATISFIED;
+    }
+}
+
+/* nvram_driver_open --
+ *     Non-volatile memory device driver open primitive.
+ */
+rtems_device_driver
+nvram_driver_open(rtems_device_major_number major,
+                  rtems_device_minor_number minor,
+                  void *arg)
+{
+    return RTEMS_SUCCESSFUL;
+}
+
+/* nvram_driver_close --
+ *     Non-volatile memory device driver close primitive.
+ */
+rtems_device_driver
+nvram_driver_close(rtems_device_major_number major,
+                   rtems_device_minor_number minor,
+                   void *arg)
+{
+    return RTEMS_SUCCESSFUL;
+}
+
+/* nvram_driver_read --
+ *     Non-volatile memory device driver read primitive.
+ */
+rtems_device_driver
+nvram_driver_read(rtems_device_major_number major,
+                  rtems_device_minor_number minor,
+                  void *arg)
+{
+    rtems_libio_rw_args_t *args = arg;
+    uint32_t   count;
+    i2c_bus_number bus = DS1307_I2C_BUS_NUMBER;
+    i2c_address    addr = DS1307_I2C_ADDRESS;
+    i2c_message_status status;
+    if (args->offset >= DS1307_NVRAM_SIZE)
+    {
+        count = 0;
+    }
+    else if (args->offset + args->count >= DS1307_NVRAM_SIZE)
+    {
+        count = DS1307_NVRAM_SIZE - args->offset;
+    }
+    else
+    {
+        count = args->count;
+    }
+    if (count > 0)
+    {
+        int try = 0;
+        do {
+            status = i2c_wbrd(bus, addr, DS1307_NVRAM_START + args->offset,
+                              args->buffer, count);
+            try++;
+        } while ((try < 15) && (status != I2C_SUCCESSFUL));
+        if (status != I2C_SUCCESSFUL)
+        {
+            errno = EIO;
+            return RTEMS_UNSATISFIED;
+        }
+    }
+    args->bytes_moved = count;
+    return RTEMS_SUCCESSFUL;
+}
+
+/* nvram_driver_write --
+ *     Non-volatile memory device driver write primitive.
+ */
+rtems_device_driver
+nvram_driver_write(rtems_device_major_number major,
+                   rtems_device_minor_number minor,
+                   void *arg)
+{
+    rtems_libio_rw_args_t *args = arg;
+    uint32_t   count;
+    i2c_bus_number bus = DS1307_I2C_BUS_NUMBER;
+    i2c_address    addr = DS1307_I2C_ADDRESS;
+    i2c_message_status status;
+
+    if (args->offset >= DS1307_NVRAM_SIZE)
+    {
+        count = 0;
+    }
+    else if (args->offset + args->count >= DS1307_NVRAM_SIZE)
+    {
+        count = DS1307_NVRAM_SIZE - args->offset;
+    }
+    else
+    {
+        count = args->count;
+    }
+    if (count > 0)
+    {
+        int try = 0;
+        do {
+            uint8_t         buf[DS1307_NVRAM_SIZE + 1];
+            buf[0] = DS1307_NVRAM_START + args->offset;
+            memcpy(buf+1, args->buffer, count);
+            status = i2c_write(bus, addr, buf, count+1);
+            try++;
+        } while ((try < 15) && (status != I2C_SUCCESSFUL));
+        if (status != I2C_SUCCESSFUL)
+        {
+            errno = EIO;
+            return RTEMS_UNSATISFIED;
+        }
+    }
+    args->bytes_moved = count;
+    return RTEMS_SUCCESSFUL;
+}
-- 
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