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SAMA5: Add slow clock support

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This commit is contained in:
Gregory Nutt 2014-07-19 13:07:55 -06:00
parent 140bb640d8
commit bad3ad58cb
21 changed files with 291 additions and 14 deletions
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2
arch/arm/src/sama5/Make.defs
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@ -99,7 +99,7 @@ CHIP_ASRCS =
CHIP_CSRCS = sam_allocateheap.c sam_boot.c sam_clockconfig.c sam_irq.c
CHIP_CSRCS += sam_lowputc.c sam_memories.c sam_pck.c sam_pio.c sam_pmc.c
CHIP_CSRCS += sam_serial.c sam_timerisr.c
CHIP_CSRCS += sam_sckc.c sam_serial.c sam_timerisr.c
# Configuration dependent C and assembly language files

63
arch/arm/src/sama5/chip/sam_sckc.h Normal file
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@ -0,0 +1,63 @@
/************************************************************************************
* arch/arm/src/sama5/chip/sam_sckc.h
*
* Copyright (C) 2014 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.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_SAMA5_CHIP_SAM_SCKC_H
#define __ARCH_ARM_SRC_SAMA5_CHIP_SAM_SCKC_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include "chip/sam_memorymap.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* SCKC Register Offsets ************************************************************/
#define SAM_SCKC_CR_OFFSET 0x0000 /* Slow Clock Controller Configuration Register */
/* SCKC Register Addresses **********************************************************/
#define SAM_SCKC_CR (SAM_SCKCR_VBASE+SAM_SCKC_CR_OFFSET)
/* SCKC Register Bit Definitions ****************************************************/
/* Slow Clock Controller Configuration Register */
#define SCKC_CR_OSCSEL (1 << 3) /* Bit 3: Slow Clock Selector */
#endif /* __ARCH_ARM_SRC_SAMA5_CHIP_SAM_SCKC_H */

103
arch/arm/src/sama5/sam_sckc.c Normal file
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@ -0,0 +1,103 @@
/****************************************************************************
* arch/arm/src/sama5/sam_sckc.c
*
* Copyright (C) 2014 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 <debug.h>
#include <nuttx/arch.h>
#include <nuttx/clock.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "sam_sckc.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_sckc_enable
*
* Description:
* Enable or disable the slow clock oscillator driver by an external
* crystal.
*
* Input Parameters:
* enable - True: enable the slow clock, False: disable the slow clock
*
* Returned Value:
* None
*
****************************************************************************/
void sam_sckc_enable(bool enable)
{
uint32_t regval;
/* Enable / disable the slow clock */
regval = enable ? SCKC_CR_OSCSEL : 0;
putreg32(regval, SAM_SCKC_CR);
/* Wait 5 slow clock cycles for internal resynchronization */
up_udelay(5 * USEC_PER_SEC / BOARD_SLOWCLK_FREQUENCY);
}

91
arch/arm/src/sama5/sam_sckc.h Normal file
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@ -0,0 +1,91 @@
/****************************************************************************
* arch/arm/src/sama5/sam_sckc.h
*
* Copyright (C) 2014 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.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_SAMA5_SAM_SCKC_H
#define __ARCH_ARM_SRC_SAMA5_SAM_SCKC_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include "chip.h"
#include "chip/sam_sckc.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef __ASSEMBLY__
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_sckc_enable
*
* Description:
* Enable or disable the slow clock oscillator driver by an external
* crystal.
*
* Input Parameters:
* enable - True: enable the slow clock, False: disable the slow clock
*
* Returned Value:
* None
*
****************************************************************************/
void sam_sckc_enable(bool enable);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_SRC_SAMA5_SAM_SCKC_H */

5
configs/sama5d3-xplained/include/board.h
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@ -52,6 +52,11 @@
* definitions will configure operational clocking.
*/
/* On-board crystal frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_SLOWCLK_FREQUENCY (32768) /* Slow Clock: 32.768KHz */
#if defined(CONFIG_SAMA5_BOOT_SDRAM)
/* When booting from SDRAM, NuttX is loaded in SDRAM by an intermediate bootloader.
* That bootloader had to have already configured the PLL and SDRAM for proper

1
configs/sama5d3-xplained/include/board_384mhz.h
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@ -161,7 +161,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (768000000) /* PLLACK: 64 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (384000000) /* CPU: PLLACK / 2 / 1 */
#define BOARD_MCK_FREQUENCY (128000000) /* MCK: PLLACK / 2 / 1 / 3 */

1
configs/sama5d3-xplained/include/board_396mhz.h
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@ -119,7 +119,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (792000000) /* PLLACK: 66 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (396000000) /* CPU: PLLACK / 2 / 1 */
#define BOARD_MCK_FREQUENCY (132000000) /* MCK: PLLACK / 2 / 1 / 3 */

1
configs/sama5d3-xplained/include/board_528mhz.h
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@ -118,7 +118,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (528000000) /* PLLACK: 44 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (528000000) /* CPU: PLLACK / 1 / 1 */
#define BOARD_MCK_FREQUENCY (132000000) /* MCK: PLLACK / 1 / 1 / 4 */

1
configs/sama5d3-xplained/include/board_sdram.h
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@ -57,7 +57,6 @@
* the Main clock source in the on-board 12MHz crystal.
*/
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (sam_pllack_frequency(BOARD_MAINOSC_FREQUENCY))
#define BOARD_PLLADIV2_FREQUENCY (sam_plladiv2_frequency(BOARD_MAINOSC_FREQUENCY))
#define BOARD_PCK_FREQUENCY (sam_pck_frequency(BOARD_MAINOSC_FREQUENCY))

5
configs/sama5d3x-ek/include/board.h
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@ -52,6 +52,11 @@
* definitions will configure operational clocking.
*/
/* On-board crystal frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_SLOWCLK_FREQUENCY (32768) /* Slow Clock: 32.768KHz */
#if defined(CONFIG_SAMA5_BOOT_SDRAM)
/* When booting from SDRAM, NuttX is loaded in SDRAM by an intermediate bootloader.
* That bootloader had to have already configured the PLL and SDRAM for proper

1
configs/sama5d3x-ek/include/board_384mhz.h
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@ -161,7 +161,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (768000000) /* PLLACK: 64 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (384000000) /* CPU: PLLACK / 2 / 1 */
#define BOARD_MCK_FREQUENCY (128000000) /* MCK: PLLACK / 2 / 1 / 3 */

1
configs/sama5d3x-ek/include/board_396mhz.h
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@ -119,7 +119,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (792000000) /* PLLACK: 66 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (396000000) /* CPU: PLLACK / 2 / 1 */
#define BOARD_MCK_FREQUENCY (132000000) /* MCK: PLLACK / 2 / 1 / 3 */

1
configs/sama5d3x-ek/include/board_528mhz.h
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@ -118,7 +118,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (528000000) /* PLLACK: 44 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (528000000) /* CPU: PLLACK / 1 / 1 */
#define BOARD_MCK_FREQUENCY (132000000) /* MCK: PLLACK / 1 / 1 / 4 */

1
configs/sama5d3x-ek/include/board_sdram.h
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@ -57,7 +57,6 @@
* the Main clock source in the on-board 12MHz crystal.
*/
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (sam_pllack_frequency(BOARD_MAINOSC_FREQUENCY))
#define BOARD_PLLADIV2_FREQUENCY (sam_plladiv2_frequency(BOARD_MAINOSC_FREQUENCY))
#define BOARD_PCK_FREQUENCY (sam_pck_frequency(BOARD_MAINOSC_FREQUENCY))

3
configs/sama5d4-ek/README.txt
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@ -2754,7 +2754,8 @@ Audio Support
CONFIG_SAMA5_SSC_MAXINFLIGHT=16 : Up to 16 pending DMA transfers
CONFIG_SAMA5_SSC0_MASTER=y : Master mode
CONFIG_SAMA5_SSC0_DATALEN=16 : 16-bit data
CONFIG_SAMA5_SSC0_RX=n : No receiver
CONFIG_SAMA5_SSC0_RX=y : Support a receiver
CONFIG_SAMA5_SSC0_RX_RKINPUT=y : Receiver gets clock from RK input
CONFIG_SAMA5_SSC0_TX=y : Support a transmitter
CONFIG_SAMA5_SSC0_TX_MCKDIV=y : Transmitter gets clock from MCK/2
CONFIG_SAMA5_SSC0_MCKDIV_SAMPLERATE=48000 : Sampling at 48K samples/sec

5
configs/sama5d4-ek/include/board.h
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@ -52,6 +52,11 @@
* definitions will configure operational clocking.
*/
/* On-board crystal frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_SLOWCLK_FREQUENCY (32768) /* Slow Clock: 32.768KHz */
#if defined(CONFIG_SAMA5_BOOT_SDRAM)
/* When booting from SDRAM, NuttX is loaded in SDRAM by an intermediate bootloader.
* That bootloader had to have already configured the PLL and SDRAM for proper

1
configs/sama5d4-ek/include/board_384mhz.h
View File

@ -159,7 +159,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (768000000) /* PLLACK: 64 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (384000000) /* CPU: PLLACK / 2 / 1 */
#define BOARD_MCK_FREQUENCY (128000000) /* MCK: PLLACK / 2 / 1 / 3 */

1
configs/sama5d4-ek/include/board_396mhz.h
View File

@ -117,7 +117,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (792000000) /* PLLACK: 66 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (396000000) /* CPU: PLLACK / 2 / 1 */
#define BOARD_MCK_FREQUENCY (132000000) /* MCK: PLLACK / 2 / 1 / 3 */

1
configs/sama5d4-ek/include/board_528mhz.h
View File

@ -116,7 +116,6 @@
/* Resulting frequencies */
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (528000000) /* PLLACK: 44 * 12Mhz / 1 */
#define BOARD_PCK_FREQUENCY (528000000) /* CPU: PLLACK / 1 / 1 */
#define BOARD_MCK_FREQUENCY (132000000) /* MCK: PLLACK / 1 / 1 / 4 */

1
configs/sama5d4-ek/include/board_sdram.h
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@ -57,7 +57,6 @@
* the Main clock source in the on-board 12MHz crystal.
*/
#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
#define BOARD_PLLA_FREQUENCY (sam_pllack_frequency(BOARD_MAINOSC_FREQUENCY))
#define BOARD_PLLADIV2_FREQUENCY (sam_plladiv2_frequency(BOARD_MAINOSC_FREQUENCY))
#define BOARD_PCK_FREQUENCY (sam_pck_frequency(BOARD_MAINOSC_FREQUENCY))

16
configs/sama5d4-ek/src/sam_wm8904.c
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@ -49,10 +49,14 @@
#include <nuttx/audio/i2s.h>
#include <nuttx/audio/wm8904.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "sam_pio.h"
#include "sam_twi.h"
#include "sam_ssc.h"
#include "sam_sckc.h"
#include "sam_pck.h"
#include "sama5d4-ek.h"
@ -270,6 +274,18 @@ int sam_wm8904_initialize(int minor)
goto errout_with_i2s;
}
/* Configure the DAC master clock. This clock is provided by PCK0 (PB26)
* that is connected to the WM8904 BCLK/GPIO4 and also drives the SSC
* TK0 input clock.
*/
sam_sckc_enable(true);
(void)sam_pck_configure(PCK0, BOARD_SLOWCLK_FREQUENCY);
/* Enable the DAC master clock */
sam_pck_enable(PCK0, true);
/* Configure WM8904 interrupts */
sam_pioirq(PIO_INT_WM8904);