Add board implentation of the codec hw.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@4971 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/boards/sam3x-ek/hw/hw_wm8731.h b/boards/sam3x-ek/hw/hw_wm8731.h
new file mode 100644 (file)
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+++ b/boards/sam3x-ek/hw/hw_wm8731.h
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+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
+ * All Rights Reserved.
+ * -->
+ *
+ * \brief HW pin handling for WM8731 audio codec.
+ *
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ */
+
+#ifndef HW_WM8731_H
+#define HW_WM8731_H
+
+#include <cfg/macros.h>
+#include <io/cm3.h>
+
+#define WM8731_PIN_INIT() \
+       do { \
+               /* implement me */ \
+       } while (0)
+
+#define WM8731_MCLK_INIT() \
+       do { \
+               /* Disable PIO on PB22 connected to mclk of the wm8731 codec */ \
+               PIOB_PDR = BV(22); \
+               /* Select the output clock on same pin */ \
+               PIO_PERIPH_SEL(PIOB_BASE, BV(22), PIO_PERIPH_B); \
+               /* Prescale the cpu clock to the frequenzy that we want. */\
+               /* (multiply value of audio sample  rate) */\
+               PMC_PCK0 = PMC_PCK_CSS_PLL | PMC_PCK_PRES_CLK_4; \
+               /* Enable the clock and wait until it starts correctly */ \
+               PMC_SCER = BV(PMC_PCK0_ID); \
+               while ((PMC_SR & BV(PMC_PCKRDY0)) == 0); \
+       } while(0)
+
+
+#endif /* HW_WM8731_H */