bsps: Move libchip to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/shared/dev/i2c/i2c-sc620.c

@@ -0,0 +1,91 @@
+/**
+ * @file
+ *
+ * @brief I2C Driver for SEMTECH SC620 Octal LED Driver
+ */
+
+/*
+ * Copyright (c) 2013 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * 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 <libchip/i2c-sc620.h>
+
+#include <rtems/libio.h>
+
+#define SC620_REG_COUNT 10
+
+static rtems_status_code i2c_sc620_write(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *arg
+)
+{
+  rtems_status_code sc = RTEMS_IO_ERROR;
+  rtems_libio_rw_args_t *rw = arg;
+  unsigned char *buf = (unsigned char *) &rw->buffer[0];
+
+  if (rw->count == 2 && buf[0] < SC620_REG_COUNT) {
+    int rv;
+
+    rv = rtems_libi2c_start_write_bytes(
+      minor, buf, 2
+    );
+    if (rv == 2) {
+      sc = rtems_libi2c_send_stop(minor);
+    }
+  }
+
+  rw->bytes_moved = sc == RTEMS_SUCCESSFUL ? 2 : 0;
+
+  return sc;
+}
+
+static rtems_status_code i2c_sc620_read(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *arg
+)
+{
+  rtems_status_code sc = RTEMS_IO_ERROR;
+  rtems_libio_rw_args_t *rw = arg;
+  unsigned char *buf = (unsigned char *) &rw->buffer[0];
+
+  if (rw->count == 1 && buf[0] < SC620_REG_COUNT) {
+    int rv;
+
+    rv = rtems_libi2c_start_write_bytes(minor, buf, 1);
+    if (rv == 1) {
+      sc = rtems_libi2c_send_addr(minor, 0);
+      if (sc == RTEMS_SUCCESSFUL) {
+        rv = rtems_libi2c_read_bytes(minor, buf, 1);
+        if (rv == 1) {
+          sc = rtems_libi2c_send_stop(minor);
+        }
+      }
+    }
+  }
+
+  rw->bytes_moved = sc == RTEMS_SUCCESSFUL ? 1 : 0;
+
+  return sc;
+}
+
+static rtems_driver_address_table i2c_sc620_ops = {
+  .read_entry =  i2c_sc620_read,
+  .write_entry = i2c_sc620_write
+};
+
+rtems_libi2c_drv_t i2c_sc620_driver = {
+  .ops = &i2c_sc620_ops,
+  .size = sizeof(i2c_sc620_driver)
+};