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SAMV7 WM8904: Leverage WM8904 logic from the SAMA5D4-EK

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This commit is contained in:
Gregory Nutt 2015-04-01 12:13:51 -06:00
parent 97acb5d9ee
commit 6342459cdb
8 changed files with 761 additions and 4 deletions
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2
configs/sama5d4-ek/src/sama5d4-ek.h
View File

@ -415,7 +415,7 @@
# if !defined(CONFIG_SAMA5_PIOE_IRQ)
# warning CONFIG_SAMA5_PIOE_IRQ is required for audio support
# undef HAVE_HSMCI
# undef HAVE_WM8904
# endif
# ifndef CONFIG_AUDIO_FORMAT_PCM

26
configs/samv71-xult/Kconfig
View File

@ -68,4 +68,30 @@ config SAMV71XULT_HSMCI0_AUTOMOUNT_UDELAY
endif # SAMV71XULT_HSMCI0_AUTOMOUNT
if AUDIO_WM8904
config SAMV71XULT_WM8904_I2CFREQUENCY
int "WM8904 I2C Frequency"
default 400000
range 1 400000
---help---
This option selects the I2C frequency to use when communicating with
the WM8904 device. The default, 400KHz, is the maximum supported by
the WM8904. If you have problems communicating with the WM8904,
then you might want to try lowering this rate.
choice
prompt "WM8904 MCLK source"
default SAMV71XULT_WM8904_SRCMAIN
config SAMV71XULT_WM8904_SRCMAIN
bool "Main Clock (12MHz)"
config SAMV71XULT_WM8904_SRCSCK
bool "Slow XTAL (32.768KHz)"
select SAMV71XULT_SLOWCLOCK
endchoice # WM8904 MCLK source
endif # AUDIO_WM8904
endif # ARCH_BOARD_SAMV71_XULT

22
configs/samv71-xult/README.txt
View File

@ -18,6 +18,7 @@ Contents
- LEDs and Buttons
- AT24MAC402 Serial EEPROM
- Networking
- Audio Interface
- maXTouch Xplained Pro
- Debugging
- Configurations
@ -694,6 +695,27 @@ additional settings.
CONFIG_NSH_NETINIT_RETRYMSEC=2000 : Configure the network monitor as you like
CONFIG_NSH_NETINIT_SIGNO=18
Audio Interface
===============
WM8904 Audio Codec
------------------
SAMV71 Interface WM8904 Interface
---- ------------ ------- ----------------------------------
PIO Usage Pin Function
---- ------------ ------- ----------------------------------
PA3 TWD0 SDA I2C control interface, data line
PA4 TWCK0 SCLK I2C control interface, clock line
PA10 RD ADCDAT Digital audio output (microphone)
PB18 PCK2 MCLK Master clock
PB0 TF LRCLK Left/right data alignment clock
PB1 TK BCLK Bit clock, for synchronization
PD11 GPIO IRQ Audio interrupt
PD24 RF LRCLK Left/right data alignment clock
PD26 TD DACDAT Digital audio input (headphone)
---- ------------ ------- ----------------------------------
maXTouch Xplained Pro
=====================

19
configs/samv71-xult/include/board.h
View File

@ -329,7 +329,24 @@
* There are no alternative pin selections for USART1.
*/
/* SSC
/* WM8904 Audio Codec
*
* SAMV71 Interface WM8904 Interface
* ---- ------------ ------- ----------------------------------
* PIO Usage Pin Function
* ---- ------------ ------- ----------------------------------
* PA3 TWD0 SDA I2C control interface, data line
* PA4 TWCK0 SCLK I2C control interface, clock line
* PA10 RD ADCDAT Digital audio output (microphone)
* PB18 PCK2 MCLK Master clock
* PB0 TF LRCLK Left/right data alignment clock
* PB1 TK BCLK Bit clock, for synchronization
* PD11 GPIO IRQ Audio interrupt
* PD24 RF LRCLK Left/right data alignment clock
* PD26 TD DACDAT Digital audio input (headphone)
* ---- ------------ ------- ----------------------------------
*
* SSC
*
* Alternative pin selections are available only for SSC0 TD.
* On the SAMV71-XULT board, PD26 supports the I2S TD function

12
configs/samv71-xult/src/Makefile
View File

@ -86,6 +86,18 @@ ifeq ($(CONFIG_USBMSC),y)
CSRCS += sam_usbmsc.c
endif
ifeq ($(CONFIG_AUDIO_WM8904),y)
ifeq ($(CONFIG_SAMA5_TWI0),y)
ifeq ($(CONFIG_SAMA5_SSC0),y)
CSRCS += sam_wm8904.c
endif
endif
endif
ifeq ($(CONFIG_AUDIO_NULL),y)
CSRCS += sam_audio_null.c
endif
ifeq ($(CONFIG_MTD_CONFIG),y)
ifeq ($(CONFIG_SAMV7_TWIHS0),y)
ifeq ($(CONFIG_MTD_AT24XX),y)

168
configs/samv71-xult/src/sam_audio_null.c Normal file
View File

@ -0,0 +1,168 @@
/************************************************************************************
* configs/samv71-xult/src/sam_audio_null.c
*
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <stdio.h>
#include <debug.h>
#include <assert.h>
#include <errno.h>
#include <nuttx/audio/audio.h>
#include <nuttx/audio/pcm.h>
#include <nuttx/audio/audio_null.h>
#include "samv71-xult.h"
#ifdef HAVE_AUDIO_NULL
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_audio_null_initialize
*
* Description:
* Set up to use the NULL audio device for PCM unit-level testing.
*
* Input Parameters:
* minor - The input device minor number
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
int sam_audio_null_initialize(int minor)
{
FAR struct audio_lowerhalf_s *nullaudio;
FAR struct audio_lowerhalf_s *pcm;
static bool initialized = false;
char devname[12];
int ret;
auddbg("minor %d\n", minor);
DEBUGASSERT(minor >= 0 && minor <= 25);
/* Have we already initialized? Since we never uninitialize we must prevent
* multiple initializations. This is necessary, for example, when the
* touchscreen example is used as a built-in application in NSH and can be
* called numerous time. It will attempt to initialize each time.
*/
if (!initialized)
{
/* Get a null audio interface
*/
nullaudio = audio_null_initialize();
if (!nullaudio)
{
auddbg("Failed to get the NULL audio interface\n");
ret = -ENODEV;
goto errout;
}
/* No we can embed the null audio interface into a PCM decoder
* instance so that we will have a PCM front end for the NULL
* audio driver.
*/
pcm = pcm_decode_initialize(nullaudio);
if (!pcm)
{
auddbg("ERROR: Failed create the PCM decoder\n");
ret = -ENODEV;
goto errout_with_nullaudio;
}
/* Create a device name */
snprintf(devname, 12, "pcm%d", minor);
/* Finally, we can register the PCM/NULL audio device. */
ret = audio_register(devname, pcm);
if (ret < 0)
{
auddbg("ERROR: Failed to register /dev/%s device: %d\n", devname, ret);
goto errout_with_pcm;
}
/* Now we are initialized */
initialized = true;
}
return OK;
/* Error exits. Unfortunately there is no mechanism in place now to
* recover resources from most errors on initialization failures.
*/
errout_with_nullaudio:
errout_with_pcm:
errout:
return ret;
}
#endif /* HAVE_AUDIO_NULL */

382
configs/samv71-xult/src/sam_wm8904.c Normal file
View File

@ -0,0 +1,382 @@
/************************************************************************************
* configs/samv71-xult/src/sam_wm8904.c
*
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <stdio.h>
#include <debug.h>
#include <assert.h>
#include <errno.h>
#include <nuttx/i2c.h>
#include <nuttx/audio/i2s.h>
#include <nuttx/audio/pcm.h>
#include <nuttx/audio/wm8904.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "sam_gpio.h"
#include "sam_twihs.h"
#include "sam_ssc.h"
#include "sam_pck.h"
#include "samv71-xult.h"
#ifdef HAVE_WM8904
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct samv7xult_mwinfo_s
{
/* Standard MW8904 interface */
struct wm8904_lower_s lower;
/* Extensions for the samv7xult board */
wm8904_handler_t handler;
FAR void *arg;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* IRQ/PIO access callbacks. These operations all hidden behind
* callbacks to isolate the WM8904 driver from differences in PIO
* interrupt handling by varying boards and MCUs. If possible,
* interrupts should be configured on both rising and falling edges
* so that contact and loss-of-contact events can be detected.
*
* attach - Attach the WM8904 interrupt handler to the PIO interrupt
* enable - Enable or disable the PIO interrupt
*/
static int wm8904_attach(FAR const struct wm8904_lower_s *lower,
wm8904_handler_t isr, FAR void *arg);
static bool wm8904_enable(FAR const struct wm8904_lower_s *lower,
bool enable);
/****************************************************************************
* Private Data
****************************************************************************/
/* A reference to a structure of this type must be passed to the WM8904
* driver. This structure provides information about the configuration
* of the WM8904 and provides some board-specific hooks.
*
* Memory for this structure is provided by the caller. It is not copied
* by the driver and is presumed to persist while the driver is active.
*/
static struct samv7xult_mwinfo_s g_wm8904info =
{
.lower =
{
.address = WM8904_I2C_ADDRESS,
.frequency = CONFIG_SAMV7D4EK_WM8904_I2CFREQUENCY,
#ifdef CONFIG_SAMV7D4EK_WM8904_SRCSCK
.mclk = BOARD_SLOWCLK_FREQUENCY,
#else
.mclk = BOARD_MAINCK_FREQUENCY,
#endif
.attach = wm8904_attach,
.enable = wm8904_enable,
},
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* IRQ/PIO access callbacks. These operations all hidden behind
* callbacks to isolate the WM8904 driver from differences in PIO
* interrupt handling by varying boards and MCUs. If possible,
* interrupts should be configured on both rising and falling edges
* so that contact and loss-of-contact events can be detected.
*
* attach - Attach the WM8904 interrupt handler to the PIO interrupt
* enable - Enable or disable the PIO interrupt
* clear - Acknowledge/clear any pending PIO interrupt
*
****************************************************************************/
static int wm8904_attach(FAR const struct wm8904_lower_s *lower,
wm8904_handler_t isr, FAR void *arg)
{
if (isr)
{
/* Just save the address of the handler and its argument for now. The
* new handler will called via wm8904_interrupt() when the interrupt occurs.
*/
audvdbg("Attaching %p\n", isr);
g_wm8904info.handler = isr;
g_wm8904info.arg = arg;
}
else
{
audvdbg("Detaching %p\n", g_wm8904info.handler);
(void)wm8904_enable(lower, false);
g_wm8904info.handler = NULL;
g_wm8904info.arg = NULL;
}
return OK;
}
static bool wm8904_enable(FAR const struct wm8904_lower_s *lower, bool enable)
{
static bool enabled;
irqstate_t flags;
bool ret;
/* Has the interrupt state changed */
flags = irqsave();
if (enable != enabled)
{
/* Enable or disable interrupts */
if (enable && g_wm8904info.handler)
{
audvdbg("Enabling\n");
sam_gpioirqenable(IRQ_INT_WM8904);
enabled = true;
}
else
{
audvdbg("Disabling\n");
sam_gpioirqdisable(IRQ_INT_WM8904);
enabled = false;
}
}
ret = enabled;
irqrestore(flags);
return ret;
}
static int wm8904_interrupt(int irq, FAR void *context)
{
/* Just forward the interrupt to the WM8904 driver */
audvdbg("handler %p\n", g_wm8904info.handler);
if (g_wm8904info.handler)
{
return g_wm8904info.handler(&g_wm8904info.lower, g_wm8904info.arg);
}
/* We got an interrupt with no handler. This should not
* happen.
*/
sam_gpioirqdisable(IRQ_INT_WM8904);
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_wm8904_initialize
*
* Description:
* This function is called by platform-specific, setup logic to configure
* and register the WM8904 device. This function will register the driver
* as /dev/wm8904[x] where x is determined by the minor device number.
*
* Input Parameters:
* minor - The input device minor number
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
int sam_wm8904_initialize(int minor)
{
FAR struct audio_lowerhalf_s *wm8904;
FAR struct audio_lowerhalf_s *pcm;
FAR struct i2c_dev_s *i2c;
FAR struct i2s_dev_s *i2s;
static bool initialized = false;
char devname[12];
int ret;
auddbg("minor %d\n", minor);
DEBUGASSERT(minor >= 0 && minor <= 25);
/* Have we already initialized? Since we never uninitialize we must prevent
* multiple initializations. This is necessary, for example, when the
* touchscreen example is used as a built-in application in NSH and can be
* called numerous time. It will attempt to initialize each time.
*/
if (!initialized)
{
/* Configure the WM8904 interrupt pin */
(void)sam_configgpio(GPIO_INT_WM8904);
/* Get an instance of the I2C interface for the WM8904 chip select */
i2c = up_i2cinitialize(WM8904_TWI_BUS);
if (!i2c)
{
auddbg("Failed to initialize TWI%d\n", WM8904_TWI_BUS);
ret = -ENODEV;
goto errout;
}
/* Get an instance of the I2S interface for the WM8904 data channel */
i2s = sam_ssc_initialize(WM8904_SSC_BUS);
if (!i2s)
{
auddbg("Failed to initialize SSC%d\n", WM8904_SSC_BUS);
ret = -ENODEV;
goto errout_with_i2c;
}
/* Configure the DAC master clock. This clock is provided by PCK2 (PB10)
* that is connected to the WM8904 MCLK.
*/
#ifdef CONFIG_SAMV7D4EK_WM8904_SRCSCK
/* Drive the DAC with the slow clock (32.768 KHz). The slow clock was
* enabled in sam_boot.c if needed.
*/
(void)sam_pck_configure(PCK2, PCKSRC_SCK, BOARD_SLOWCLK_FREQUENCY);
#else
/* Drive the DAC with the main clock (12 MHz) */
(void)sam_pck_configure(PCK2, PCKSRC_MAINCK, BOARD_MAINCK_FREQUENCY);
#endif
/* Enable the DAC master clock */
sam_pck_enable(PCK2, true);
/* Configure WM8904 interrupts */
sam_gpioirq(GPIO_INT_WM8904);
ret = irq_attach(IRQ_INT_WM8904, wm8904_interrupt);
if (ret < 0)
{
auddbg("ERROR: Failed to attach WM8904 interrupt: %d\n", ret);
goto errout_with_i2s;
}
/* Now we can use these I2C and I2S interfaces to initialize the
* MW8904 which will return an audio interface.
*/
wm8904 = wm8904_initialize(i2c, i2s, &g_wm8904info.lower);
if (!wm8904)
{
auddbg("Failed to initialize the WM8904\n");
ret = -ENODEV;
goto errout_with_irq;
}
/* No we can embed the WM8904/I2C/I2S conglomerate into a PCM decoder
* instance so that we will have a PCM front end for the the WM8904
* driver.
*/
pcm = pcm_decode_initialize(wm8904);
if (!pcm)
{
auddbg("ERROR: Failed create the PCM decoder\n");
ret = -ENODEV;
goto errout_with_wm8904;
}
/* Create a device name */
snprintf(devname, 12, "pcm%d", minor);
/* Finally, we can register the PCM/WM8904/I2C/I2S audio device.
*
* Is anyone young enough to remember Rube Goldberg?
*/
ret = audio_register(devname, pcm);
if (ret < 0)
{
auddbg("ERROR: Failed to register /dev/%s device: %d\n", devname, ret);
goto errout_with_pcm;
}
/* Now we are initialized */
initialized = true;
}
return OK;
/* Error exits. Unfortunately there is no mechanism in place now to
* recover resources from most errors on initialization failures.
*/
errout_with_pcm:
errout_with_wm8904:
errout_with_irq:
irq_detach(IRQ_INT_WM8904);
errout_with_i2s:
errout_with_i2c:
errout:
return ret;
}
#endif /* HAVE_WM8904 */

134
configs/samv71-xult/src/samv71-xult.h
View File

@ -61,6 +61,8 @@
#define HAVE_NETWORK 1
#define HAVE_MACADDR 1
#define HAVE_MTDCONFIG 1
#define HAVE_WM8904 1
#define HAVE_AUDIO_NULL 1
/* HSMCI */
/* Can't support MMC/SD if the card interface is not enabled */
@ -179,6 +181,63 @@
# undef HAVE_MTDCONFIG
#endif
/* Audio */
/* PCM/WM8904 driver */
#ifndef CONFIG_AUDIO_WM8904
# undef HAVE_WM8904
#endif
#ifdef HAVE_WM8904
# ifndef CONFIG_SAMV7_TWI0
# warning CONFIG_SAMV7_TWI0 is required for audio support
# undef HAVE_WM8904
# endif
# ifndef CONFIG_SAMV7_SSC0
# warning CONFIG_SAMV7_SSC0 is required for audio support
# undef HAVE_WM8904
# endif
# if !defined(CONFIG_SAMV7_PIOD_IRQ)
# warning CONFIG_SAMV7_PIOD_IRQ is required for audio support
# undef HAVE_WM8904
# endif
# ifndef CONFIG_AUDIO_FORMAT_PCM
# warning CONFIG_AUDIO_FORMAT_PCM is required for audio support
# undef HAVE_WM8904
# endif
# ifndef CONFIG_SAMV7D4EK_WM8904_I2CFREQUENCY
# warning Defaulting to maximum WM8904 I2C frequency
# define CONFIG_SAMV7D4EK_WM8904_I2CFREQUENCY 400000
# endif
# if CONFIG_SAMV7D4EK_WM8904_I2CFREQUENCY > 400000
# warning WM8904 I2C frequency cannot exceed 400KHz
# undef CONFIG_SAMV7D4EK_WM8904_I2CFREQUENCY
# define CONFIG_SAMV7D4EK_WM8904_I2CFREQUENCY 400000
# endif
#endif
/* PCM/null driver */
#ifndef CONFIG_AUDIO_NULL
# undef HAVE_AUDIO_NULL
#endif
#ifndef HAVE_WM8904
# undef HAVE_AUDIO_NULL
#endif
#ifdef HAVE_AUDIO_NULL
# ifndef CONFIG_AUDIO_FORMAT_PCM
# warning CONFIG_AUDIO_FORMAT_PCM is required for audio support
# undef HAVE_AUDIO_NULL
# endif
#endif
/* SAMV71-XULT GPIO Pin Definitions *************************************************/
/* Ethernet MAC.
@ -304,10 +363,41 @@
#define GPIO_VBUSON (GPIO_OUTPUT | GPIO_CFG_DEFAULT | GPIO_OUTPUT_SET | \
GPIO_PORT_PIOC | GPIO_PIN16)
/* SPI Chip Selects
* to be provided
/* WM8904 Audio Codec ***************************************************************/
/* SAMV71 Interface WM8904 Interface
* ---- ------------ ------- ----------------------------------
* PIO Usage Pin Function
* ---- ------------ ------- ----------------------------------
* PA3 TWD0 SDA I2C control interface, data line
* PA4 TWCK0 SCLK I2C control interface, clock line
* PA10 RD ADCDAT Digital audio output (microphone)
* PB18 PCK2 MCLK Master clock
* PB0 TF LRCLK Left/right data alignment clock
* PB1 TK BCLK Bit clock, for synchronization
* PD11 GPIO IRQ Audio interrupt
* PD24 RF LRCLK Left/right data alignment clock
* PD26 TD DACDAT Digital audio input (headphone)
* ---- ------------ ------- ----------------------------------
*/
/* Audio Interrupt. All interrupts are default, active high level. Pull down
* internally in the WM8904. So we want no pull-up/downs and we want to
* interrupt on the high level.
*/
#define GPIO_INT_WM8904 (PIO_INPUT | PIO_CFG_DEFAULT | PIO_CFG_DEGLITCH | \
PIO_INT_HIGHLEVEL | PIO_PORT_PIOD | PIO_PIN11)
#define IRQ_INT_WM8904 SAM_IRQ_PD11
/* The MW8904 communicates on TWI0, I2C address 0x1a for control operations */
#define WM8904_TWI_BUS 0
#define WM8904_I2C_ADDRESS 0x1a
/* The MW8904 transfers data on SSC0 */
#define WM8904_SSC_BUS 0
/************************************************************************************
* Public Types
************************************************************************************/
@ -519,5 +609,45 @@ bool sam_writeprotected(int slotno);
int sam_at24config(void);
#endif
/****************************************************************************
* Name: sam_wm8904_initialize
*
* Description:
* This function is called by platform-specific, setup logic to configure
* and register the WM8904 device. This function will register the driver
* as /dev/wm8904[x] where x is determined by the minor device number.
*
* Input Parameters:
* minor - The input device minor number
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
#ifdef HAVE_WM8904
int sam_wm8904_initialize(int minor);
#endif /* HAVE_WM8904 */
/****************************************************************************
* Name: sam_audio_null_initialize
*
* Description:
* Set up to use the NULL audio device for PCM unit-level testing.
*
* Input Parameters:
* minor - The input device minor number
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
#ifdef HAVE_AUDIO_NULL
int sam_audio_null_initialize(int minor);
#endif /* HAVE_AUDIO_NULL */
#endif /* __ASSEMBLY__ */
#endif /* __CONFIGS_SAMV71_XULT_SRC_SAMV71_XULT_H */