iPod Classic: implement HAVE_SERIAL

Change-Id: I24a861cd45095d858d1a7db39969f6eda17cc563

firmware/target/arm/s5l8702/ipod6g/serial-ipod6g.c

@@ -0,0 +1,87 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2014 by Cástor Muñoz
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#include "config.h"
+#include "cpu.h"
+#include "system.h"
+#include "kernel.h"
+
+#include "serial.h"
+#include "s5l8702.h"
+#include "uc8702.h"
+#include "uart-s5l8702.h"
+
+/* Define LOGF_ENABLE to enable logf output in this file */
+#define LOGF_ENABLE
+#include "logf.h"
+
+
+/* shall include serial HW configuracion for specific target */
+#define IPOD6G_UART_CLK_HZ      12000000    /* external OSC0 ??? */
+
+extern struct uartc s5l8702_uart;
+
+struct uartc_port ser_port IDATA_ATTR = {
+    /* location */
+    .uartc = &s5l8702_uart,
+    .id = 0,
+
+    /* configuration */
+    .rx_trg = UFCON_RX_FIFO_TRG_4,
+    .tx_trg = UFCON_TX_FIFO_TRG_EMPTY,
+    .clksel = UCON_CLKSEL_ECLK,
+    .clkhz = IPOD6G_UART_CLK_HZ,
+
+    /* interrupt callbacks */
+    .rx_cb = NULL,
+    .tx_cb = NULL,  /* polling */
+};
+
+/*
+ * serial driver API
+ */
+void serial_setup(void)
+{
+    uart_port_init(&ser_port);
+
+    /* set a default configuration, Tx and Rx modes are
+       disabled when the port is initialized */
+    uartc_port_config(&ser_port, 115200, ULCON_DATA_BITS_8,
+                        ULCON_PARITY_NONE, ULCON_STOP_BITS_1);
+
+    /* enable Tx interrupt request or POLLING mode */
+    uartc_port_set_tx_mode(&ser_port, UCON_MODE_INTREQ);
+
+    logf("[%lu] serial_setup(): port %d ready!", USEC_TIMER, ser_port.id);
+}
+
+int tx_rdy(void)
+{
+    return uartc_port_tx_ready(&ser_port) ? 1 : 0;
+}
+
+void tx_writec(unsigned char c)
+{
+    uartc_port_tx_byte(&ser_port, c);
+}