From 7abf2b53a462612808d46d6d77a7f35261a0e5a3 Mon Sep 17 00:00:00 2001
From: Michael Sevakis <jethead71@rockbox.org>
Date: Fri, 9 Apr 2010 01:21:53 +0000
Subject: Gigabeat S/i.MX31: Sort files in the /target tree into things that
 are SoC-generic (into /imx31) and player-specific (into /gigabeat-s, based
 upon current appearances). Move i2s clock init into the appropriate file.
 Housekeeping only-- no functional changes.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25547 a1c6a512-1295-4272-9138-f99709370657
---
 .../arm/imx31/gigabeat-s/kernel-gigabeat-s.c       | 84 ++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 firmware/target/arm/imx31/gigabeat-s/kernel-gigabeat-s.c

(limited to 'firmware/target/arm/imx31/gigabeat-s/kernel-gigabeat-s.c')

diff --git a/firmware/target/arm/imx31/gigabeat-s/kernel-gigabeat-s.c b/firmware/target/arm/imx31/gigabeat-s/kernel-gigabeat-s.c
new file mode 100644
index 0000000000..8e81447bd3
--- /dev/null
+++ b/firmware/target/arm/imx31/gigabeat-s/kernel-gigabeat-s.c
@@ -0,0 +1,84 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Michael Sevakis
+ *
+ * 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 "config.h"
+#include "system.h"
+#include "avic-imx31.h"
+#include "spi-imx31.h"
+#include "mc13783.h"
+#include "ccm-imx31.h"
+#include "sdma-imx31.h"
+#include "dvfs_dptc-imx31.h"
+#include "kernel.h"
+#include "thread.h"
+
+static __attribute__((interrupt("IRQ"))) void EPIT1_HANDLER(void)
+{
+    EPITSR1 = EPITSR_OCIF; /* Clear the pending status */
+
+    /* Run through the list of tick tasks */
+    call_tick_tasks();
+}
+
+void tick_start(unsigned int interval_in_ms)
+{
+    ccm_module_clock_gating(CG_EPIT1, CGM_ON_RUN_WAIT); /* EPIT1 module
+                                               clock ON - before writing
+                                               regs! */
+    EPITCR1 &= ~(EPITCR_OCIEN | EPITCR_EN); /* Disable the counter */
+    CCM_WIMR0 &= ~CCM_WIMR0_IPI_INT_EPIT1;  /* Clear wakeup mask */
+
+    /* mcu_main_clk = 528MHz = 27MHz * 2 * ((9 + 7/9) / 1)
+     * CLKSRC = ipg_clk = 528MHz / 4 / 2 = 66MHz,
+     * EPIT Output Disconnected,
+     * Enabled in wait mode
+     * Prescale 1/2640 for 25KHz
+     * Reload from modulus register,
+     * Compare interrupt enabled,
+     * Count from load value */
+    EPITCR1 = EPITCR_CLKSRC_IPG_CLK | EPITCR_WAITEN | EPITCR_IOVW |
+              ((2640-1) << EPITCR_PRESCALER_POS) | EPITCR_RLD |
+              EPITCR_OCIEN | EPITCR_ENMOD;
+ 
+    EPITLR1 = interval_in_ms*25; /* Count down from interval */
+    EPITCMPR1 = 0;               /* Event when counter reaches 0 */
+    EPITSR1 = EPITSR_OCIF;       /* Clear any pending interrupt */
+    avic_enable_int(INT_EPIT1, INT_TYPE_IRQ, INT_PRIO_DEFAULT,
+                    EPIT1_HANDLER);
+    EPITCR1 |= EPITCR_EN;        /* Enable the counter */
+}
+
+void kernel_device_init(void)
+{
+    sdma_init();
+    spi_init();
+    mc13783_init();
+    dvfs_dptc_start();
+}
+
+#ifdef BOOTLOADER
+void tick_stop(void)
+{
+    avic_disable_int(INT_EPIT1);            /* Disable insterrupt */
+    EPITCR1 &= ~(EPITCR_OCIEN | EPITCR_EN); /* Disable counter */
+    EPITSR1 = EPITSR_OCIF;                  /* Clear pending */
+    ccm_module_clock_gating(CG_EPIT1, CGM_OFF); /* Turn off module clock */
+}
+#endif
-- 
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