SAMA5 ISI: Framework for ISI drivers. Not much there on initial check-in
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Gregory Nutt
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177
arch/arm/src/sama5/sam_isi.c
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177
arch/arm/src/sama5/sam_isi.c
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/****************************************************************************
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* arch/arm/src/sama5/sam_isi.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include "sam_pio.h"
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#include "sam_pck.h"
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#include "sam_isi.h"
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#ifdef CONFIG_SAMA5_ISI
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* The sensor master clock (ISI_MCK) is generated by the Advanced Power
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* Management Controller (APMC) through a Programmable Clock output.
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*/
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#ifndef CONFIG_ISI_MCKFREQ
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# error "CONFIG_ISI_MCKFREQ must be defined"
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#endif
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#if defined(CONFIG_ISI_PCK0)
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# define ISI_PCKID PCK0
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#elif defined(CONFIG_ISI_PCK1)
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# define ISI_PCKID PCK1
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#elif defined(CONFIG_ISI_PCK2)
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# define ISI_PCKID PCK2
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#else
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# error "No valid PCK selection"
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure defines the overall state of the ISI interface */
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struct sam_isi_s
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{
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uint32_t actual; /* Acutal ISI_MCK frequency */
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* ISI interface state */
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static struct sam_isi_s g_isi;
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: sam_isi_initialize
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*
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* Description:
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* Initialize the ISI driver.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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* Assumptions:
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* Called very early in the initialization sequence.
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*
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****************************************************************************/
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int sam_isi_initialize(void)
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{
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int ret;
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/* Configure PIO pins for the ISI (outputs) */
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/* Data pins */
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(void)sam_configpio(PIO_ISI_D0);
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(void)sam_configpio(PIO_ISI_D1);
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(void)sam_configpio(PIO_ISI_D2);
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(void)sam_configpio(PIO_ISI_D3);
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(void)sam_configpio(PIO_ISI_D4);
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(void)sam_configpio(PIO_ISI_D5);
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(void)sam_configpio(PIO_ISI_D6);
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(void)sam_configpio(PIO_ISI_D7);
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(void)sam_configpio(PIO_ISI_D8);
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(void)sam_configpio(PIO_ISI_D9);
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(void)sam_configpio(PIO_ISI_D10);
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(void)sam_configpio(PIO_ISI_D11);
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/* Horizontal and vertical sync pins (inputs) */
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(void)sam_configpio(PIO_ISI_HSYNC);
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(void)sam_configpio(PIO_ISI_VSYNC);
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/* Pixel clock input (ISI_PCK, not to be confused with the processor clock
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* (PCK) or the programmable clock (PCK).
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*
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* NOTE: "Several parts of the ISI controller use the pixel clock provided
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* by the image sensor (ISI_PCK). Thus the user must first program the
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* image sensor to provide this clock (ISI_PCK) before programming the
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* Image Sensor Controller."
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*/
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(void)sam_configpio(PIO_ISI_PCK);
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/* Configure ISI_MCK programmable clock output.
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*
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* REVISIT: Might this not be needed before the image sensor is
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* initialized?
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*/
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g_isi.actual = sam_pck_configure(ISI_PCKID, CONFIG_ISI_MCKFREQ);
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gvdbg("PCK%d frequency=%d actual=%d\n",
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ISI_PCKID, CONFIG_ISI_MCKFREQ, g_isi.actual);
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/* Enable the MCK (output) */
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sam_pck_enable(ISI_PCKID, true);
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/* Configure the pixel clock */
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#warning Missing logic
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/* Configure color */
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#warning Missing logic
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}
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#endif /* CONFIG_SAMA5_ISI && CONFIG_SAMA5_EMAC */
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92
arch/arm/src/sama5/sam_isi.h
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92
arch/arm/src/sama5/sam_isi.h
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@ -0,0 +1,92 @@
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/************************************************************************************
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* arch/arm/src/sama5/sam_isi.h
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
|
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
|
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_SAMA5_SAM_ISI_H
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#define __ARCH_ARM_SRC_SAMA5_SAM_ISI_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include "chip.h"
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#include "chip/sam_isi.h"
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Function: sam_isi_initialize
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*
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* Description:
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* Initialize the ISI driver.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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* Assumptions:
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* Called very early in the initialization sequence.
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*
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****************************************************************************/
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#ifdef CONFIG_SAMA5_ISI
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int sam_isi_initialize(void);
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_SAMA5_SAM_ISI_H */
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