Add UART suuport for s5l8700 and s5l8701

Add UART support for s5l8700/1 using the UC870X UART controller,
actually the functionallity is disabled and must be enabled for
each individual target. Tested on iPod Nano 2G (s5l8701), not
tested on s5l8700.

Change-Id: Ic0f216bb871502d355a70e4b658e536a2c0976a9

1 files changed, 129 insertions, 0 deletions

diff --git a/firmware/target/arm/s5l8700/uart-s5l8700.c b/firmware/target/arm/s5l8700/uart-s5l8700.c
new file mode 100644
index 0000000000..80207e94df
--- /dev/null
+++ b/firmware/target/arm/s5l8700/uart-s5l8700.c
@@ -0,0 +1,129 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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 <stdint.h>
+#include <stdbool.h>
+
+#include "config.h"
+#include "system.h"
+
+#include "s5l8700.h"
+#include "uc870x.h"
+
+
+/*
+ * XXX: This code is based on datasheets and NEVER TESTED !!!
+ */
+
+
+/*
+ * s5l8700 UC870X HW: 1 UARTC, 2 ports
+ */
+static struct uartc_port *uartc_port_l[UARTC_N_PORTS];
+const struct uartc s5l8700_uartc =
+{
+    .id       = 0,
+    .baddr    = UARTC_BASE_ADDR,
+    .port_off = UARTC_PORT_OFFSET,
+    .n_ports  = UARTC_N_PORTS,
+    .port_l   = uartc_port_l,
+};
+
+static int intmsk_uart[S5L8700_N_PORTS] = { INTMSK_UART0, INTMSK_UART1 };
+
+/*
+ * Device level functions specific to S5L8700
+ */
+void uart_target_enable_gpio(int uart_id, int port_id)
+{
+    (void) uart_id;
+    switch (port_id) {
+        /* configure UARTx Tx/Rx GPIO ports */
+        case 0:
+            PCON0 = (PCON0 & 0x0fff) | 0xa000;
+            break;
+        case 1:
+            PCON6 = (PCON6 & 0xfff00fff) | 0x00044000;
+            break;
+    }
+}
+
+void uart_target_disable_gpio(int uart_id, int port_id)
+{
+    (void) uart_id;
+    switch (port_id) {
+        /* configure default reset values */
+        case 0:
+            PCON0 = (PCON0 & 0x0fff) | 0x0000;
+            break;
+        case 1:
+            PCON6 = (PCON6 & 0xfff00fff) | 0x00000000;
+            break;
+    }
+}
+
+void uart_target_enable_irq(int uart_id, int port_id)
+{
+    (void) uart_id;
+    INTMSK |= intmsk_uart[port_id];
+}
+
+void uart_target_disable_irq(int uart_id, int port_id)
+{
+    (void) uart_id;
+    INTMSK &= ~intmsk_uart[port_id];
+}
+
+void uart_target_clear_irq(int uart_id, int port_id)
+{
+    (void) uart_id;
+    SRCPND |= intmsk_uart[port_id];
+}
+
+void uart_target_enable_clocks(int uart_id)
+{
+    (void) uart_id;
+    PWRCON &= ~(1 << CLOCKGATE_UARTC);
+}
+
+void uart_target_disable_clocks(int uart_id)
+{
+    (void) uart_id;
+    PWRCON |= (1 << CLOCKGATE_UARTC);
+}
+
+/*
+ * ISRs
+ */
+void ICODE_ATTR INT_UART0(void)
+{
+    uartc_callback(&s5l8700_uartc, 0);
+}
+
+void ICODE_ATTR INT_UART1(void)
+{
+    uartc_callback(&s5l8700_uartc, 1);
+}
+
+/* Main init */
+void uart_init(void)
+{
+    uartc_open(&s5l8700_uartc);
+}