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STM32F4: add cs43l22 audio driver and i2s driver

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This commit is contained in:
Taras Drozdovsky
2017-05-21 14:14:09 -06:00
committed by Gregory Nutt
parent 679a08e371
commit 4ab2a3661e
16 changed files with 6211 additions and 5 deletions
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configs/stm32f4discovery/include/board.h
+31 -3
View File
@@ -300,9 +300,9 @@
/* SPI - There is a MEMS device on SPI1 using these pins: */
#define GPIO_SPI1_MISO GPIO_SPI1_MISO_1
#define GPIO_SPI1_MOSI GPIO_SPI1_MOSI_1
#define GPIO_SPI1_SCK GPIO_SPI1_SCK_1
#define GPIO_SPI1_MISO GPIO_SPI1_MISO_1
#define GPIO_SPI1_MOSI GPIO_SPI1_MOSI_1
#define GPIO_SPI1_SCK GPIO_SPI1_SCK_1
/* SPI2 - Test MAX31855 on SPI2 PB10 = SCK, PB14 = MISO */
@@ -310,10 +310,38 @@
#define GPIO_SPI2_MOSI GPIO_SPI2_MOSI_1
#define GPIO_SPI2_SCK GPIO_SPI2_SCK_1
/* SPI3 - Onboard devices use SPI3 */
#define GPIO_SPI3_MISO GPIO_SPI3_MISO_2
#define GPIO_SPI3_MOSI GPIO_SPI3_MOSI_2
#define GPIO_SPI3_SCK GPIO_SPI3_SCK_2
#define GPIO_SPI3_NSS GPIO_SPI3_NSS_2
/* I2S3 - Onboard devices use I2S3 */
#define GPIO_I2S3_SD GPIO_I2S3_SD_2
#define GPIO_I2S3_CK GPIO_I2S3_CK_2
#define GPIO_I2S3_WS GPIO_I2S3_WS_1
#define DMACHAN_SPI3_RX DMAMAP_SPI3_RX_2
#define DMACHAN_SPI3_TX DMAMAP_SPI3_TX_2
/* I2C config to use with Nunchuk PB7 (SDA) and PB8 (SCL) */
#if 0
#define GPIO_I2C1_SCL GPIO_I2C1_SCL_2
#define GPIO_I2C1_SDA GPIO_I2C1_SDA_1
#endif
/* I2C. Only I2C1 is available on the stm32f4discovery. I2C1_SCL and I2C1_SDA are
* available on the following pins:
*
* - PB6 is I2C1_SCL
* - PB9 is I2C1_SDA
*/
#define GPIO_I2C1_SCL GPIO_I2C1_SCL_1
#define GPIO_I2C1_SDA GPIO_I2C1_SDA_2
/* Timer Inputs/Outputs (see the README.txt file for options) */
configs/stm32f4discovery/src/Makefile
+4
View File
@@ -44,6 +44,10 @@ else
CSRCS += stm32_userleds.c
endif
ifeq ($(CONFIG_AUDIO_CS43L22),y)
CSRCS += stm32_cs43l22.c
endif
ifeq ($(CONFIG_ARCH_BUTTONS),y)
CSRCS += stm32_buttons.c
endif
configs/stm32f4discovery/src/stm32_bringup.c
+10
View File
@@ -216,6 +216,16 @@ int stm32_bringup(void)
}
#endif
#ifdef HAVE_CS43L22
/* Configure CS43L22 audio */
ret = stm32_cs43l22_initialize(1);
if (ret != OK)
{
serr("Failed to initialize CS43L22 audio: %d\n", ret);
}
#endif
#ifdef HAVE_ELF
/* Initialize the ELF binary loader */
configs/stm32f4discovery/src/stm32_cs43l22.c
+389
View File
@@ -0,0 +1,389 @@
/************************************************************************************
* configs/stm32f4discovery/src/stm32_cs43l22.c
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Author: Taras Drozdovskiy <t.drozdovskiy@gmail.com>
*
* 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/irq.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/audio/i2s.h>
#include <nuttx/audio/pcm.h>
#include <nuttx/audio/cs43l22.h>
#include <arch/board/board.h>
#include "stm32.h"
#include "stm32f4discovery.h"
#ifdef HAVE_CS43L22
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct stm32_mwinfo_s
{
/* Standard CS43L22 interface */
struct cs43l22_lower_s lower;
/* Extensions for the stm32f4discovery board */
cs43l22_handler_t handler;
FAR void *arg;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* IRQ/PIO access callbacks. These operations all hidden behind
* callbacks to isolate the CS43L22 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 CS43L22 interrupt handler to the PIO interrupt
* enable - Enable or disable the PIO interrupt
*/
static int cs43l22_attach(FAR const struct cs43l22_lower_s *lower,
cs43l22_handler_t isr, FAR void *arg);
static bool cs43l22_enable(FAR const struct cs43l22_lower_s *lower,
bool enable);
static void cs43l22_hw_reset(FAR const struct cs43l22_lower_s *lower);
/****************************************************************************
* Private Data
****************************************************************************/
/* A reference to a structure of this type must be passed to the CS43L22
* driver. This structure provides information about the configuration
* of the CS43L22 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.
*/
#define CONFIG_STM32_CS43L22_I2CFREQUENCY 100000
#define BOARD_MAINCK_FREQUENCY 8000000
static struct stm32_mwinfo_s g_cs43l22info =
{
.lower =
{
.address = CS43L22_I2C_ADDRESS,
.frequency = CONFIG_STM32_CS43L22_I2CFREQUENCY,
#ifdef CONFIG_STM32_CS43L22_SRCSCK
.mclk = BOARD_SLOWCLK_FREQUENCY,
#else
.mclk = BOARD_MAINCK_FREQUENCY,
#endif
.attach = cs43l22_attach,
.enable = cs43l22_enable,
.reset = cs43l22_hw_reset,
},
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* IRQ/PIO access callbacks. These operations all hidden behind
* callbacks to isolate the CS43L22 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 CS43L22 interrupt handler to the PIO interrupt
* enable - Enable or disable the PIO interrupt
* clear - Acknowledge/clear any pending PIO interrupt
*
****************************************************************************/
static int cs43l22_attach(FAR const struct cs43l22_lower_s *lower,
cs43l22_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 cs43l22_interrupt() when the interrupt occurs.
*/
audinfo("Attaching %p\n", isr);
g_cs43l22info.handler = isr;
g_cs43l22info.arg = arg;
}
else
{
audinfo("Detaching %p\n", g_cs43l22info.handler);
(void)cs43l22_enable(lower, false);
g_cs43l22info.handler = NULL;
g_cs43l22info.arg = NULL;
}
return OK;
}
static bool cs43l22_enable(FAR const struct cs43l22_lower_s *lower, bool enable)
{
static bool enabled;
irqstate_t flags;
bool ret;
/* Has the interrupt state changed */
flags = enter_critical_section();
if (enable != enabled)
{
/* Enable or disable interrupts */
if (enable && g_cs43l22info.handler)
{
audinfo("Enabling\n");
/* TODO: stm32_pioirqenable(IRQ_INT_CS43L22); */
enabled = true;
}
else
{
audinfo("Disabling\n");
/* TODO: stm32_pioirqdisable(IRQ_INT_CS43L22); */
enabled = false;
}
}
ret = enabled;
leave_critical_section(flags);
return ret;
}
#if 0
static int cs43l22_interrupt(int irq, FAR void *context)
{
Just forward the interrupt to the CS43L22 driver
audinfo("handler %p\n", g_cs43l22info.handler);
if (g_cs43l22info.handler)
{
return g_cs43l22info.handler(&g_cs43l22info.lower, g_cs43l22info.arg);
}
We got an interrupt with no handler. This should not
happen.
TODO: stm32_pioirqdisable(IRQ_INT_CS43L22);
return OK;
}
#endif
static void cs43l22_hw_reset(FAR const struct cs43l22_lower_s *lower)
{
int i;
/* Reset the codec */
stm32_gpiowrite(GPIO_CS43L22_RESET, false);
for (i = 0; i < 0x4fff; i++)
{
__asm__ volatile("nop");
}
stm32_gpiowrite(GPIO_CS43L22_RESET, true);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_cs43l22_initialize
*
* Description:
* This function is called by platform-specific, setup logic to configure
* and register the CS43L22 device. This function will register the driver
* as /dev/audio/pcm[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 stm32_cs43l22_initialize(int minor)
{
FAR struct audio_lowerhalf_s *cs43l22;
FAR struct audio_lowerhalf_s *pcm;
FAR struct i2c_master_s *i2c;
FAR struct i2s_dev_s *i2s;
static bool initialized = false;
char devname[12];
int ret;
audinfo("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)
{
stm32_configgpio(GPIO_CS43L22_RESET);
/* Configure the CS43L22 interrupt pin */
/* TODO: (void)stm32_configgpio(PIO_INT_CS43L22); */
/* Get an instance of the I2C interface for the CS43L22 chip select */
i2c = stm32_i2cbus_initialize(CS43L22_I2C_BUS);
if (!i2c)
{
auderr("ERROR: Failed to initialize TWI%d\n", CS43L22_I2C_BUS);
ret = -ENODEV;
goto errout;
}
/* Get an instance of the I2S interface for the CS43L22 data channel */
i2s = stm32_i2sdev_initialize(CS43L22_I2S_BUS);
if (!i2s)
{
auderr("ERROR: Failed to initialize I2S%d\n", CS43L22_I2S_BUS);
ret = -ENODEV;
goto errout_with_i2c;
}
/* Configure the DAC master clock. This clock is provided by PCK2 (PB10)
* that is connected to the CS43L22 MCLK.
*/
/* Configure CS43L22 interrupts */
#if 0 /* TODO: */
stm32_pioirq(PIO_INT_CS43L22);
ret = irq_attach(IRQ_INT_CS43L22, cs43l22_interrupt);
if (ret < 0)
{
auderr("ERROR: Failed to attach CS43L22 interrupt: %d\n", ret);
goto errout_with_i2s;
}
#endif
/* Now we can use these I2C and I2S interfaces to initialize the
* CS43L22 which will return an audio interface.
*/
cs43l22 = cs43l22_initialize(i2c, i2s, &g_cs43l22info.lower);
if (!cs43l22)
{
auderr("ERROR: Failed to initialize the CS43L22\n");
ret = -ENODEV;
goto errout_with_irq;
}
/* No we can embed the CS43L22/I2C/I2S conglomerate into a PCM decoder
* instance so that we will have a PCM front end for the the CS43L22
* driver.
*/
pcm = pcm_decode_initialize(cs43l22);
if (!pcm)
{
auderr("ERROR: Failed create the PCM decoder\n");
ret = -ENODEV;
goto errout_with_cs43l22;
}
/* Create a device name */
snprintf(devname, 12, "pcm%d", minor);
/* Finally, we can register the PCM/CS43L22/I2C/I2S audio device.
*
* Is anyone young enough to remember Rube Goldberg?
*/
ret = audio_register(devname, pcm);
if (ret < 0)
{
auderr("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_cs43l22:
errout_with_irq:
#if 0
irq_detach(IRQ_INT_CS43L22);
errout_with_i2s:
#endif
errout_with_i2c:
errout:
return ret;
}
#endif /* HAVE_CS43L22 */
configs/stm32f4discovery/src/stm32f4discovery.h
+55
View File
@@ -77,6 +77,7 @@
#define HAVE_USBHOST 1
#define HAVE_USBMONITOR 1
#define HAVE_SDIO 1
#define HAVE_CS43L22 1
#define HAVE_RTC_DRIVER 1
#define HAVE_ELF 1
#define HAVE_NETMONITOR 1
@@ -148,6 +149,26 @@
# endif
#endif
/* The CS43L22 depends on the CS43L22 driver, I2C1, and I2S3 support */
#if !defiend(CONFIG_AUDIO_CS43L22) || !defined(CONFIG_STM32_I2C1) || \
!defined(CONFIG_STM32_I2S3)
# undef HAVE_CS43L22
#endif
#ifdef HAVE_CS43L22
/* The CS43L22 communicates on I2C1, I2C address 0x1a for control
* operations
*/
# define CS43L22_I2C_BUS 1
# define CS43L22_I2C_ADDRESS (0x94 >> 1)
/* The CS43L22 transfers data on I2S3 */
# define CS43L22_I2S_BUS 3
#endif
/* Check if we can support the RTC driver */
#if !defined(CONFIG_RTC) || !defined(CONFIG_RTC_DRIVER)
@@ -216,6 +237,8 @@
#define GPIO_ZEROCROSS (GPIO_INPUT|GPIO_FLOAT|GPIO_EXTI|GPIO_PORTD|GPIO_PIN0)
#define GPIO_CS43L22_RESET (GPIO_OUTPUT|GPIO_SPEED_50MHz|GPIO_PORTD|GPIO_PIN4)
/* PWM
*
* The STM32F4 Discovery has no real on-board PWM devices, but the board can be
@@ -369,6 +392,17 @@
void weak_function stm32_spidev_initialize(void);
/****************************************************************************
* Name: stm32_i2sdev_initialize
*
* Description:
* Called to configure I2S chip select GPIO pins for the stm32f4discovery
* board.
*
****************************************************************************/
FAR struct i2s_dev_s *stm32_i2sdev_initialize(int port);
/****************************************************************************
* Name: stm32_bh1750initialize
*
@@ -608,6 +642,27 @@ int stm32_zerocross_initialize(void);
int stm32_max6675initialize(FAR const char *devpath);
#endif
/****************************************************************************
* Name: stm32_cs43l22_initialize
*
* Description:
* This function is called by platform-specific, setup logic to configure
* and register the CS43L22 device. This function will register the driver
* as /dev/cs43l22[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_CS43L22
int stm32_cs43l22_initialize(int minor);
#endif /* HAVE_CS43L22 */
/****************************************************************************
* Name: stm32_pca9635_initialize
*