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authorAmaury Pouly <pamaury@rockbox.org>2011-05-01 13:02:46 +0000
committerAmaury Pouly <pamaury@rockbox.org>2011-05-01 13:02:46 +0000
commit08fb3f65745a237e2c1eae55d856ff27702246e5 (patch)
treea56ce11ac20e4df0e36de9195306c10b71752538 /firmware/target/arm/imx233/timrot-imx233.c
parentc0838cbfd8e45621fe3450aee1bf9458ff420d16 (diff)
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Sansa Fuze+: initial commit (bootloader only, LCD basically working)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29808 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/imx233/timrot-imx233.c')
-rw-r--r--firmware/target/arm/imx233/timrot-imx233.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/firmware/target/arm/imx233/timrot-imx233.c b/firmware/target/arm/imx233/timrot-imx233.c
new file mode 100644
index 0000000000..64a7c63f24
--- /dev/null
+++ b/firmware/target/arm/imx233/timrot-imx233.c
@@ -0,0 +1,76 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2011 by Amaury Pouly
+ *
+ * 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 "timrot-imx233.h"
+#include "clkctrl-imx233.h"
+
+imx233_timer_fn_t timer_fns[4];
+
+#define define_timer_irq(nr) \
+void INT_TIMER##nr(void) \
+{ \
+ if(timer_fns[nr]) \
+ timer_fns[nr](); \
+ __REG_CLR(HW_TIMROT_TIMCTRL(nr)) = HW_TIMROT_TIMCTRL__IRQ; \
+}
+
+define_timer_irq(0)
+define_timer_irq(1)
+define_timer_irq(2)
+define_timer_irq(3)
+
+void imx233_setup_timer(unsigned timer_nr, bool reload, unsigned count,
+ unsigned src, unsigned prescale, bool polarity, imx233_timer_fn_t fn)
+{
+ timer_fns[timer_nr] = fn;
+
+ HW_TIMROT_TIMCTRL(timer_nr) = src | prescale;
+ if(polarity)
+ __REG_SET(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__POLARITY;
+ if(reload)
+ {
+ __REG_SET(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__RELOAD;
+ /* manual says count - 1 for reload timers */
+ HW_TIMROT_TIMCOUNT(timer_nr) = count - 1;
+ }
+ else
+ HW_TIMROT_TIMCOUNT(timer_nr) = count;
+ /* only enable interrupt if function is set */
+ if(fn != NULL)
+ {
+ /* enable interrupt */
+ imx233_enable_interrupt(INT_SRC_TIMER(timer_nr), true);
+ /* clear irq bit and enable */
+ __REG_CLR(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__IRQ;
+ __REG_SET(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__IRQ_EN;
+ }
+ else
+ imx233_enable_interrupt(INT_SRC_TIMER(timer_nr), false);
+ /* finally update */
+ __REG_SET(HW_TIMROT_TIMCTRL(timer_nr)) = HW_TIMROT_TIMCTRL__UPDATE;
+}
+
+void imx233_timrot_init(void)
+{
+ __REG_CLR(HW_TIMROT_ROTCTRL) = __BLOCK_CLKGATE;
+ __REG_CLR(HW_TIMROT_ROTCTRL) = __BLOCK_SFTRST;
+ /* enable xtal path to timrot */
+ imx233_enable_timrot_xtal_clk32k(true);
+}