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V4L/DVB (11350): Add camera (CSI) driver for MX1
Add support for CMOS Sensor Interface on i.MX1 and i.MXL SoCs. create mode 100644 arch/arm/mach-mx1/ksym_mx1.c create mode 100644 arch/arm/mach-mx1/mx1_camera_fiq.S create mode 100644 arch/arm/plat-mxc/include/mach/mx1_camera.h create mode 100644 drivers/media/video/mx1_camera.c Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Signed-off-by: Darius Augulis <augulis.darius@gmail.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Paulius Zaleckas
Mauro Carvalho Chehab
parent
b71df97a3f
commit
6acc81c394
9 changed files with 940 additions and 2 deletions
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@ -6,6 +6,9 @@
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obj-y += generic.o clock.o devices.o
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# Support for CMOS sensor interface
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obj-$(CONFIG_MX1_VIDEO) += ksym_mx1.o mx1_camera_fiq.o
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# Specific board support
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obj-$(CONFIG_ARCH_MX1ADS) += mx1ads.o
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obj-$(CONFIG_MACH_SCB9328) += scb9328.o
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@ -44,7 +44,7 @@ static struct resource imx_csi_resources[] = {
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static u64 imx_csi_dmamask = 0xffffffffUL;
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struct platform_device imx_csi_device = {
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.name = "imx-csi",
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.name = "mx1-camera",
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.id = 0, /* This is used to put cameras on this interface */
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.dev = {
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.dma_mask = &imx_csi_dmamask,
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18
arch/arm/mach-mx1/ksym_mx1.c
Normal file
18
arch/arm/mach-mx1/ksym_mx1.c
Normal file
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@ -0,0 +1,18 @@
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/*
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* Exported ksyms of ARCH_MX1
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*
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* Copyright (C) 2008, Darius Augulis <augulis.darius@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <mach/mx1_camera.h>
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/* IMX camera FIQ handler */
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EXPORT_SYMBOL(mx1_camera_sof_fiq_start);
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EXPORT_SYMBOL(mx1_camera_sof_fiq_end);
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35
arch/arm/mach-mx1/mx1_camera_fiq.S
Normal file
35
arch/arm/mach-mx1/mx1_camera_fiq.S
Normal file
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@ -0,0 +1,35 @@
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/*
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* Copyright (C) 2008 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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*
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* Based on linux/arch/arm/lib/floppydma.S
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* Copyright (C) 1995, 1996 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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.text
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.global mx1_camera_sof_fiq_end
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.global mx1_camera_sof_fiq_start
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mx1_camera_sof_fiq_start:
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@ enable dma
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ldr r12, [r9]
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orr r12, r12, #0x00000001
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str r12, [r9]
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@ unmask DMA interrupt
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ldr r12, [r8]
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bic r12, r12, r13
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str r12, [r8]
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@ disable SOF interrupt
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ldr r12, [r10]
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bic r12, r12, #0x00010000
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str r12, [r10]
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@ clear SOF flag
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mov r12, #0x00010000
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str r12, [r11]
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@ return from FIQ
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subs pc, lr, #4
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mx1_camera_sof_fiq_end:
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@ -24,4 +24,12 @@
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#define PHYS_OFFSET UL(0x80000000)
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#endif
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#if defined(CONFIG_MX1_VIDEO)
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/*
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* Increase size of DMA-consistent memory region.
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* This is required for i.MX camera driver to capture at least four VGA frames.
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*/
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#define CONSISTENT_DMA_SIZE SZ_4M
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#endif /* CONFIG_MX1_VIDEO */
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#endif /* __ASM_ARCH_MXC_MEMORY_H__ */
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35
arch/arm/plat-mxc/include/mach/mx1_camera.h
Normal file
35
arch/arm/plat-mxc/include/mach/mx1_camera.h
Normal file
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@ -0,0 +1,35 @@
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/*
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* mx1_camera.h - i.MX1/i.MXL camera driver header file
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*
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* Copyright (c) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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* Copyright (C) 2009, Darius Augulis <augulis.darius@gmail.com>
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*
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* Based on PXA camera.h file:
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* Copyright (C) 2003, Intel Corporation
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* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_ARCH_CAMERA_H_
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#define __ASM_ARCH_CAMERA_H_
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#define MX1_CAMERA_DATA_HIGH 1
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#define MX1_CAMERA_PCLK_RISING 2
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#define MX1_CAMERA_VSYNC_HIGH 4
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extern unsigned char mx1_camera_sof_fiq_start, mx1_camera_sof_fiq_end;
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/**
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* struct mx1_camera_pdata - i.MX1/i.MXL camera platform data
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* @mclk_10khz: master clock frequency in 10kHz units
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* @flags: MX1 camera platform flags
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*/
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struct mx1_camera_pdata {
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unsigned long mclk_10khz;
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unsigned long flags;
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};
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#endif /* __ASM_ARCH_CAMERA_H_ */
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@ -746,6 +746,18 @@ config SOC_CAMERA_OV772X
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help
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This is a ov772x camera driver
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config MX1_VIDEO
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bool
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config VIDEO_MX1
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tristate "i.MX1/i.MXL CMOS Sensor Interface driver"
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depends on VIDEO_DEV && ARCH_MX1 && SOC_CAMERA
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select FIQ
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select VIDEOBUF_DMA_CONTIG
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select MX1_VIDEO
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---help---
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This is a v4l2 driver for the i.MX1/i.MXL CMOS Sensor Interface
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config VIDEO_MX3
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tristate "i.MX3x Camera Sensor Interface driver"
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depends on VIDEO_DEV && MX3_IPU && SOC_CAMERA
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@ -904,5 +916,4 @@ config USB_S2255
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This driver can be compiled as a module, called s2255drv.
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endif # V4L_USB_DRIVERS
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endif # VIDEO_CAPTURE_DRIVERS
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@ -133,6 +133,7 @@ obj-$(CONFIG_VIDEO_CX18) += cx18/
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obj-$(CONFIG_VIDEO_VIVI) += vivi.o
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obj-$(CONFIG_VIDEO_CX23885) += cx23885/
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obj-$(CONFIG_VIDEO_MX1) += mx1_camera.o
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obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o
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obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
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obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o
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827
drivers/media/video/mx1_camera.c
Normal file
827
drivers/media/video/mx1_camera.c
Normal file
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@ -0,0 +1,827 @@
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/*
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* V4L2 Driver for i.MXL/i.MXL camera (CSI) host
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*
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* Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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* Copyright (C) 2009, Darius Augulis <augulis.darius@gmail.com>
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*
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* Based on PXA SoC camera driver
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* Copyright (C) 2006, Sascha Hauer, Pengutronix
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* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/mutex.h>
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#include <linux/platform_device.h>
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#include <linux/time.h>
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#include <linux/version.h>
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#include <linux/videodev2.h>
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#include <media/soc_camera.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-dev.h>
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#include <media/videobuf-dma-contig.h>
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#include <asm/dma.h>
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#include <asm/fiq.h>
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#include <mach/dma-mx1-mx2.h>
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#include <mach/hardware.h>
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#include <mach/mx1_camera.h>
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/*
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* CSI registers
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*/
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#define DMA_CCR(x) (0x8c + ((x) << 6)) /* Control Registers */
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#define DMA_DIMR 0x08 /* Interrupt mask Register */
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#define CSICR1 0x00 /* CSI Control Register 1 */
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#define CSISR 0x08 /* CSI Status Register */
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#define CSIRXR 0x10 /* CSI RxFIFO Register */
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#define CSICR1_RXFF_LEVEL(x) (((x) & 0x3) << 19)
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#define CSICR1_SOF_POL (1 << 17)
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#define CSICR1_SOF_INTEN (1 << 16)
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#define CSICR1_MCLKDIV(x) (((x) & 0xf) << 12)
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#define CSICR1_MCLKEN (1 << 9)
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#define CSICR1_FCC (1 << 8)
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#define CSICR1_BIG_ENDIAN (1 << 7)
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#define CSICR1_CLR_RXFIFO (1 << 5)
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#define CSICR1_GCLK_MODE (1 << 4)
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#define CSICR1_DATA_POL (1 << 2)
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#define CSICR1_REDGE (1 << 1)
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#define CSICR1_EN (1 << 0)
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#define CSISR_SFF_OR_INT (1 << 25)
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#define CSISR_RFF_OR_INT (1 << 24)
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#define CSISR_STATFF_INT (1 << 21)
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#define CSISR_RXFF_INT (1 << 18)
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#define CSISR_SOF_INT (1 << 16)
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#define CSISR_DRDY (1 << 0)
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#define VERSION_CODE KERNEL_VERSION(0, 0, 1)
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#define DRIVER_NAME "mx1-camera"
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#define CSI_IRQ_MASK (CSISR_SFF_OR_INT | CSISR_RFF_OR_INT | \
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CSISR_STATFF_INT | CSISR_RXFF_INT | CSISR_SOF_INT)
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#define CSI_BUS_FLAGS (SOCAM_MASTER | SOCAM_HSYNC_ACTIVE_HIGH | \
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SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW | \
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SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING | \
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SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW | \
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SOCAM_DATAWIDTH_8)
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#define MAX_VIDEO_MEM 16 /* Video memory limit in megabytes */
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/*
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* Structures
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*/
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/* buffer for one video frame */
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struct mx1_buffer {
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/* common v4l buffer stuff -- must be first */
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struct videobuf_buffer vb;
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const struct soc_camera_data_format *fmt;
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int inwork;
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};
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/* i.MX1/i.MXL is only supposed to handle one camera on its Camera Sensor
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* Interface. If anyone ever builds hardware to enable more than
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* one camera, they will have to modify this driver too */
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struct mx1_camera_dev {
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struct soc_camera_device *icd;
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struct mx1_camera_pdata *pdata;
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struct mx1_buffer *active;
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struct device *dev;
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struct resource *res;
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struct clk *clk;
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struct list_head capture;
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void __iomem *base;
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int dma_chan;
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unsigned int irq;
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unsigned long mclk;
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spinlock_t lock;
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};
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/*
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* Videobuf operations
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*/
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static int mx1_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
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unsigned int *size)
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{
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struct soc_camera_device *icd = vq->priv_data;
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*size = icd->width * icd->height *
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((icd->current_fmt->depth + 7) >> 3);
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if (!*count)
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*count = 32;
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while (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
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(*count)--;
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dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
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return 0;
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}
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static void free_buffer(struct videobuf_queue *vq, struct mx1_buffer *buf)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct videobuf_buffer *vb = &buf->vb;
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BUG_ON(in_interrupt());
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
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vb, vb->baddr, vb->bsize);
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/* This waits until this buffer is out of danger, i.e., until it is no
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* longer in STATE_QUEUED or STATE_ACTIVE */
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videobuf_waiton(vb, 0, 0);
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videobuf_dma_contig_free(vq, vb);
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vb->state = VIDEOBUF_NEEDS_INIT;
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}
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static int mx1_videobuf_prepare(struct videobuf_queue *vq,
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struct videobuf_buffer *vb, enum v4l2_field field)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb);
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int ret;
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
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vb, vb->baddr, vb->bsize);
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/* Added list head initialization on alloc */
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WARN_ON(!list_empty(&vb->queue));
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BUG_ON(NULL == icd->current_fmt);
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/* I think, in buf_prepare you only have to protect global data,
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* the actual buffer is yours */
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buf->inwork = 1;
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if (buf->fmt != icd->current_fmt ||
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vb->width != icd->width ||
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vb->height != icd->height ||
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vb->field != field) {
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buf->fmt = icd->current_fmt;
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vb->width = icd->width;
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vb->height = icd->height;
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vb->field = field;
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vb->state = VIDEOBUF_NEEDS_INIT;
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}
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vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
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if (0 != vb->baddr && vb->bsize < vb->size) {
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ret = -EINVAL;
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goto out;
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}
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if (vb->state == VIDEOBUF_NEEDS_INIT) {
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ret = videobuf_iolock(vq, vb, NULL);
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if (ret)
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goto fail;
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vb->state = VIDEOBUF_PREPARED;
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}
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buf->inwork = 0;
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return 0;
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fail:
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free_buffer(vq, buf);
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out:
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buf->inwork = 0;
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return ret;
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}
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static int mx1_camera_setup_dma(struct mx1_camera_dev *pcdev)
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{
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struct videobuf_buffer *vbuf = &pcdev->active->vb;
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int ret;
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if (unlikely(!pcdev->active)) {
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dev_err(pcdev->dev, "DMA End IRQ with no active buffer\n");
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return -EFAULT;
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}
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/* setup sg list for future DMA */
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ret = imx_dma_setup_single(pcdev->dma_chan,
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videobuf_to_dma_contig(vbuf),
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vbuf->size, pcdev->res->start +
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CSIRXR, DMA_MODE_READ);
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if (unlikely(ret))
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dev_err(pcdev->dev, "Failed to setup DMA sg list\n");
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return ret;
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}
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static void mx1_videobuf_queue(struct videobuf_queue *vq,
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struct videobuf_buffer *vb)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct mx1_camera_dev *pcdev = ici->priv;
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struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb);
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unsigned long flags;
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
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vb, vb->baddr, vb->bsize);
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spin_lock_irqsave(&pcdev->lock, flags);
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list_add_tail(&vb->queue, &pcdev->capture);
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vb->state = VIDEOBUF_ACTIVE;
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if (!pcdev->active) {
|
||||
pcdev->active = buf;
|
||||
|
||||
/* setup sg list for future DMA */
|
||||
if (!mx1_camera_setup_dma(pcdev)) {
|
||||
unsigned int temp;
|
||||
/* enable SOF irq */
|
||||
temp = __raw_readl(pcdev->base + CSICR1) |
|
||||
CSICR1_SOF_INTEN;
|
||||
__raw_writel(temp, pcdev->base + CSICR1);
|
||||
}
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&pcdev->lock, flags);
|
||||
}
|
||||
|
||||
static void mx1_videobuf_release(struct videobuf_queue *vq,
|
||||
struct videobuf_buffer *vb)
|
||||
{
|
||||
struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb);
|
||||
#ifdef DEBUG
|
||||
struct soc_camera_device *icd = vq->priv_data;
|
||||
|
||||
dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
|
||||
vb, vb->baddr, vb->bsize);
|
||||
|
||||
switch (vb->state) {
|
||||
case VIDEOBUF_ACTIVE:
|
||||
dev_dbg(&icd->dev, "%s (active)\n", __func__);
|
||||
break;
|
||||
case VIDEOBUF_QUEUED:
|
||||
dev_dbg(&icd->dev, "%s (queued)\n", __func__);
|
||||
break;
|
||||
case VIDEOBUF_PREPARED:
|
||||
dev_dbg(&icd->dev, "%s (prepared)\n", __func__);
|
||||
break;
|
||||
default:
|
||||
dev_dbg(&icd->dev, "%s (unknown)\n", __func__);
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
|
||||
free_buffer(vq, buf);
|
||||
}
|
||||
|
||||
static void mx1_camera_wakeup(struct mx1_camera_dev *pcdev,
|
||||
struct videobuf_buffer *vb,
|
||||
struct mx1_buffer *buf)
|
||||
{
|
||||
/* _init is used to debug races, see comment in mx1_camera_reqbufs() */
|
||||
list_del_init(&vb->queue);
|
||||
vb->state = VIDEOBUF_DONE;
|
||||
do_gettimeofday(&vb->ts);
|
||||
vb->field_count++;
|
||||
wake_up(&vb->done);
|
||||
|
||||
if (list_empty(&pcdev->capture)) {
|
||||
pcdev->active = NULL;
|
||||
return;
|
||||
}
|
||||
|
||||
pcdev->active = list_entry(pcdev->capture.next,
|
||||
struct mx1_buffer, vb.queue);
|
||||
|
||||
/* setup sg list for future DMA */
|
||||
if (likely(!mx1_camera_setup_dma(pcdev))) {
|
||||
unsigned int temp;
|
||||
|
||||
/* enable SOF irq */
|
||||
temp = __raw_readl(pcdev->base + CSICR1) | CSICR1_SOF_INTEN;
|
||||
__raw_writel(temp, pcdev->base + CSICR1);
|
||||
}
|
||||
}
|
||||
|
||||
static void mx1_camera_dma_irq(int channel, void *data)
|
||||
{
|
||||
struct mx1_camera_dev *pcdev = data;
|
||||
struct mx1_buffer *buf;
|
||||
struct videobuf_buffer *vb;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&pcdev->lock, flags);
|
||||
|
||||
imx_dma_disable(channel);
|
||||
|
||||
if (unlikely(!pcdev->active)) {
|
||||
dev_err(pcdev->dev, "DMA End IRQ with no active buffer\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
vb = &pcdev->active->vb;
|
||||
buf = container_of(vb, struct mx1_buffer, vb);
|
||||
WARN_ON(buf->inwork || list_empty(&vb->queue));
|
||||
dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
|
||||
vb, vb->baddr, vb->bsize);
|
||||
|
||||
mx1_camera_wakeup(pcdev, vb, buf);
|
||||
out:
|
||||
spin_unlock_irqrestore(&pcdev->lock, flags);
|
||||
}
|
||||
|
||||
static struct videobuf_queue_ops mx1_videobuf_ops = {
|
||||
.buf_setup = mx1_videobuf_setup,
|
||||
.buf_prepare = mx1_videobuf_prepare,
|
||||
.buf_queue = mx1_videobuf_queue,
|
||||
.buf_release = mx1_videobuf_release,
|
||||
};
|
||||
|
||||
static void mx1_camera_init_videobuf(struct videobuf_queue *q,
|
||||
struct soc_camera_device *icd)
|
||||
{
|
||||
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
||||
struct mx1_camera_dev *pcdev = ici->priv;
|
||||
|
||||
videobuf_queue_dma_contig_init(q, &mx1_videobuf_ops, pcdev->dev,
|
||||
&pcdev->lock,
|
||||
V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
||||
V4L2_FIELD_NONE,
|
||||
sizeof(struct mx1_buffer), icd);
|
||||
}
|
||||
|
||||
static int mclk_get_divisor(struct mx1_camera_dev *pcdev)
|
||||
{
|
||||
unsigned int mclk = pcdev->mclk;
|
||||
unsigned long div;
|
||||
unsigned long lcdclk;
|
||||
|
||||
lcdclk = clk_get_rate(pcdev->clk);
|
||||
|
||||
/* We verify platform_mclk_10khz != 0, so if anyone breaks it, here
|
||||
* they get a nice Oops */
|
||||
div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;
|
||||
|
||||
dev_dbg(pcdev->dev, "System clock %lukHz, target freq %dkHz, "
|
||||
"divisor %lu\n", lcdclk / 1000, mclk / 1000, div);
|
||||
|
||||
return div;
|
||||
}
|
||||
|
||||
static void mx1_camera_activate(struct mx1_camera_dev *pcdev)
|
||||
{
|
||||
unsigned int csicr1 = CSICR1_EN;
|
||||
|
||||
dev_dbg(pcdev->dev, "Activate device\n");
|
||||
|
||||
clk_enable(pcdev->clk);
|
||||
|
||||
/* enable CSI before doing anything else */
|
||||
__raw_writel(csicr1, pcdev->base + CSICR1);
|
||||
|
||||
csicr1 |= CSICR1_MCLKEN | CSICR1_FCC | CSICR1_GCLK_MODE;
|
||||
csicr1 |= CSICR1_MCLKDIV(mclk_get_divisor(pcdev));
|
||||
csicr1 |= CSICR1_RXFF_LEVEL(2); /* 16 words */
|
||||
|
||||
__raw_writel(csicr1, pcdev->base + CSICR1);
|
||||
}
|
||||
|
||||
static void mx1_camera_deactivate(struct mx1_camera_dev *pcdev)
|
||||
{
|
||||
dev_dbg(pcdev->dev, "Deactivate device\n");
|
||||
|
||||
/* Disable all CSI interface */
|
||||
__raw_writel(0x00, pcdev->base + CSICR1);
|
||||
|
||||
clk_disable(pcdev->clk);
|
||||
}
|
||||
|
||||
/* The following two functions absolutely depend on the fact, that
|
||||
* there can be only one camera on i.MX1/i.MXL camera sensor interface */
|
||||
static int mx1_camera_add_device(struct soc_camera_device *icd)
|
||||
{
|
||||
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
||||
struct mx1_camera_dev *pcdev = ici->priv;
|
||||
int ret;
|
||||
|
||||
if (pcdev->icd) {
|
||||
ret = -EBUSY;
|
||||
goto ebusy;
|
||||
}
|
||||
|
||||
dev_info(&icd->dev, "MX1 Camera driver attached to camera %d\n",
|
||||
icd->devnum);
|
||||
|
||||
mx1_camera_activate(pcdev);
|
||||
ret = icd->ops->init(icd);
|
||||
|
||||
if (!ret)
|
||||
pcdev->icd = icd;
|
||||
|
||||
ebusy:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void mx1_camera_remove_device(struct soc_camera_device *icd)
|
||||
{
|
||||
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
||||
struct mx1_camera_dev *pcdev = ici->priv;
|
||||
unsigned int csicr1;
|
||||
|
||||
BUG_ON(icd != pcdev->icd);
|
||||
|
||||
/* disable interrupts */
|
||||
csicr1 = __raw_readl(pcdev->base + CSICR1) & ~CSI_IRQ_MASK;
|
||||
__raw_writel(csicr1, pcdev->base + CSICR1);
|
||||
|
||||
/* Stop DMA engine */
|
||||
imx_dma_disable(pcdev->dma_chan);
|
||||
|
||||
dev_info(&icd->dev, "MX1 Camera driver detached from camera %d\n",
|
||||
icd->devnum);
|
||||
|
||||
icd->ops->release(icd);
|
||||
|
||||
mx1_camera_deactivate(pcdev);
|
||||
|
||||
pcdev->icd = NULL;
|
||||
}
|
||||
|
||||
static int mx1_camera_set_crop(struct soc_camera_device *icd,
|
||||
struct v4l2_rect *rect)
|
||||
{
|
||||
return icd->ops->set_crop(icd, rect);
|
||||
}
|
||||
|
||||
static int mx1_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
|
||||
{
|
||||
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
||||
struct mx1_camera_dev *pcdev = ici->priv;
|
||||
unsigned long camera_flags, common_flags;
|
||||
unsigned int csicr1;
|
||||
int ret;
|
||||
|
||||
camera_flags = icd->ops->query_bus_param(icd);
|
||||
|
||||
/* MX1 supports only 8bit buswidth */
|
||||
common_flags = soc_camera_bus_param_compatible(camera_flags,
|
||||
CSI_BUS_FLAGS);
|
||||
if (!common_flags)
|
||||
return -EINVAL;
|
||||
|
||||
icd->buswidth = 8;
|
||||
|
||||
/* Make choises, based on platform choice */
|
||||
if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
|
||||
(common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
|
||||
if (!pcdev->pdata ||
|
||||
pcdev->pdata->flags & MX1_CAMERA_VSYNC_HIGH)
|
||||
common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
|
||||
else
|
||||
common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
|
||||
}
|
||||
|
||||
if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) &&
|
||||
(common_flags & SOCAM_PCLK_SAMPLE_FALLING)) {
|
||||
if (!pcdev->pdata ||
|
||||
pcdev->pdata->flags & MX1_CAMERA_PCLK_RISING)
|
||||
common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING;
|
||||
else
|
||||
common_flags &= ~SOCAM_PCLK_SAMPLE_RISING;
|
||||
}
|
||||
|
||||
if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) &&
|
||||
(common_flags & SOCAM_DATA_ACTIVE_LOW)) {
|
||||
if (!pcdev->pdata ||
|
||||
pcdev->pdata->flags & MX1_CAMERA_DATA_HIGH)
|
||||
common_flags &= ~SOCAM_DATA_ACTIVE_LOW;
|
||||
else
|
||||
common_flags &= ~SOCAM_DATA_ACTIVE_HIGH;
|
||||
}
|
||||
|
||||
ret = icd->ops->set_bus_param(icd, common_flags);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
csicr1 = __raw_readl(pcdev->base + CSICR1);
|
||||
|
||||
if (common_flags & SOCAM_PCLK_SAMPLE_RISING)
|
||||
csicr1 |= CSICR1_REDGE;
|
||||
if (common_flags & SOCAM_VSYNC_ACTIVE_HIGH)
|
||||
csicr1 |= CSICR1_SOF_POL;
|
||||
if (common_flags & SOCAM_DATA_ACTIVE_LOW)
|
||||
csicr1 |= CSICR1_DATA_POL;
|
||||
|
||||
__raw_writel(csicr1, pcdev->base + CSICR1);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mx1_camera_set_fmt(struct soc_camera_device *icd,
|
||||
struct v4l2_format *f)
|
||||
{
|
||||
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
||||
const struct soc_camera_format_xlate *xlate;
|
||||
struct v4l2_pix_format *pix = &f->fmt.pix;
|
||||
int ret;
|
||||
|
||||
xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
|
||||
if (!xlate) {
|
||||
dev_warn(&ici->dev, "Format %x not found\n", pix->pixelformat);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = icd->ops->set_fmt(icd, f);
|
||||
if (!ret) {
|
||||
icd->buswidth = xlate->buswidth;
|
||||
icd->current_fmt = xlate->host_fmt;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mx1_camera_try_fmt(struct soc_camera_device *icd,
|
||||
struct v4l2_format *f)
|
||||
{
|
||||
/* TODO: limit to mx1 hardware capabilities */
|
||||
|
||||
/* limit to sensor capabilities */
|
||||
return icd->ops->try_fmt(icd, f);
|
||||
}
|
||||
|
||||
static int mx1_camera_reqbufs(struct soc_camera_file *icf,
|
||||
struct v4l2_requestbuffers *p)
|
||||
{
|
||||
int i;
|
||||
|
||||
/* This is for locking debugging only. I removed spinlocks and now I
|
||||
* check whether .prepare is ever called on a linked buffer, or whether
|
||||
* a dma IRQ can occur for an in-work or unlinked buffer. Until now
|
||||
* it hadn't triggered */
|
||||
for (i = 0; i < p->count; i++) {
|
||||
struct mx1_buffer *buf = container_of(icf->vb_vidq.bufs[i],
|
||||
struct mx1_buffer, vb);
|
||||
buf->inwork = 0;
|
||||
INIT_LIST_HEAD(&buf->vb.queue);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned int mx1_camera_poll(struct file *file, poll_table *pt)
|
||||
{
|
||||
struct soc_camera_file *icf = file->private_data;
|
||||
struct mx1_buffer *buf;
|
||||
|
||||
buf = list_entry(icf->vb_vidq.stream.next, struct mx1_buffer,
|
||||
vb.stream);
|
||||
|
||||
poll_wait(file, &buf->vb.done, pt);
|
||||
|
||||
if (buf->vb.state == VIDEOBUF_DONE ||
|
||||
buf->vb.state == VIDEOBUF_ERROR)
|
||||
return POLLIN | POLLRDNORM;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mx1_camera_querycap(struct soc_camera_host *ici,
|
||||
struct v4l2_capability *cap)
|
||||
{
|
||||
/* cap->name is set by the friendly caller:-> */
|
||||
strlcpy(cap->card, "i.MX1/i.MXL Camera", sizeof(cap->card));
|
||||
cap->version = VERSION_CODE;
|
||||
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct soc_camera_host_ops mx1_soc_camera_host_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.add = mx1_camera_add_device,
|
||||
.remove = mx1_camera_remove_device,
|
||||
.set_bus_param = mx1_camera_set_bus_param,
|
||||
.set_crop = mx1_camera_set_crop,
|
||||
.set_fmt = mx1_camera_set_fmt,
|
||||
.try_fmt = mx1_camera_try_fmt,
|
||||
.init_videobuf = mx1_camera_init_videobuf,
|
||||
.reqbufs = mx1_camera_reqbufs,
|
||||
.poll = mx1_camera_poll,
|
||||
.querycap = mx1_camera_querycap,
|
||||
};
|
||||
|
||||
/* Should be allocated dynamically too, but we have only one. */
|
||||
static struct soc_camera_host mx1_soc_camera_host = {
|
||||
.drv_name = DRIVER_NAME,
|
||||
.ops = &mx1_soc_camera_host_ops,
|
||||
};
|
||||
|
||||
static struct fiq_handler fh = {
|
||||
.name = "csi_sof"
|
||||
};
|
||||
|
||||
static int __init mx1_camera_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct mx1_camera_dev *pcdev;
|
||||
struct resource *res;
|
||||
struct pt_regs regs;
|
||||
struct clk *clk;
|
||||
void __iomem *base;
|
||||
unsigned int irq;
|
||||
int err = 0;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (!res || !irq) {
|
||||
err = -ENODEV;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
clk = clk_get(&pdev->dev, "csi_clk");
|
||||
if (IS_ERR(clk)) {
|
||||
err = PTR_ERR(clk);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
|
||||
if (!pcdev) {
|
||||
dev_err(&pdev->dev, "Could not allocate pcdev\n");
|
||||
err = -ENOMEM;
|
||||
goto exit_put_clk;
|
||||
}
|
||||
|
||||
dev_set_drvdata(&pdev->dev, pcdev);
|
||||
pcdev->res = res;
|
||||
pcdev->clk = clk;
|
||||
|
||||
pcdev->pdata = pdev->dev.platform_data;
|
||||
|
||||
if (pcdev->pdata)
|
||||
pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
|
||||
|
||||
if (!pcdev->mclk) {
|
||||
dev_warn(&pdev->dev,
|
||||
"mclk_10khz == 0! Please, fix your platform data. "
|
||||
"Using default 20MHz\n");
|
||||
pcdev->mclk = 20000000;
|
||||
}
|
||||
|
||||
INIT_LIST_HEAD(&pcdev->capture);
|
||||
spin_lock_init(&pcdev->lock);
|
||||
|
||||
/*
|
||||
* Request the regions.
|
||||
*/
|
||||
if (!request_mem_region(res->start, resource_size(res), DRIVER_NAME)) {
|
||||
err = -EBUSY;
|
||||
goto exit_kfree;
|
||||
}
|
||||
|
||||
base = ioremap(res->start, resource_size(res));
|
||||
if (!base) {
|
||||
err = -ENOMEM;
|
||||
goto exit_release;
|
||||
}
|
||||
pcdev->irq = irq;
|
||||
pcdev->base = base;
|
||||
pcdev->dev = &pdev->dev;
|
||||
|
||||
/* request dma */
|
||||
pcdev->dma_chan = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_HIGH);
|
||||
if (pcdev->dma_chan < 0) {
|
||||
dev_err(pcdev->dev, "Can't request DMA for MX1 CSI\n");
|
||||
err = -EBUSY;
|
||||
goto exit_iounmap;
|
||||
}
|
||||
dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chan);
|
||||
|
||||
imx_dma_setup_handlers(pcdev->dma_chan, mx1_camera_dma_irq, NULL,
|
||||
pcdev);
|
||||
|
||||
imx_dma_config_channel(pcdev->dma_chan, IMX_DMA_TYPE_FIFO,
|
||||
IMX_DMA_MEMSIZE_32, DMA_REQ_CSI_R, 0);
|
||||
/* burst length : 16 words = 64 bytes */
|
||||
imx_dma_config_burstlen(pcdev->dma_chan, 0);
|
||||
|
||||
/* request irq */
|
||||
err = claim_fiq(&fh);
|
||||
if (err) {
|
||||
dev_err(pcdev->dev, "Camera interrupt register failed \n");
|
||||
goto exit_free_dma;
|
||||
}
|
||||
|
||||
set_fiq_handler(&mx1_camera_sof_fiq_start, &mx1_camera_sof_fiq_end -
|
||||
&mx1_camera_sof_fiq_start);
|
||||
|
||||
regs.ARM_r8 = DMA_BASE + DMA_DIMR;
|
||||
regs.ARM_r9 = DMA_BASE + DMA_CCR(pcdev->dma_chan);
|
||||
regs.ARM_r10 = (long)pcdev->base + CSICR1;
|
||||
regs.ARM_fp = (long)pcdev->base + CSISR;
|
||||
regs.ARM_sp = 1 << pcdev->dma_chan;
|
||||
set_fiq_regs(®s);
|
||||
|
||||
mxc_set_irq_fiq(irq, 1);
|
||||
enable_fiq(irq);
|
||||
|
||||
mx1_soc_camera_host.priv = pcdev;
|
||||
mx1_soc_camera_host.dev.parent = &pdev->dev;
|
||||
mx1_soc_camera_host.nr = pdev->id;
|
||||
err = soc_camera_host_register(&mx1_soc_camera_host);
|
||||
if (err)
|
||||
goto exit_free_irq;
|
||||
|
||||
dev_info(&pdev->dev, "MX1 Camera driver loaded\n");
|
||||
|
||||
return 0;
|
||||
|
||||
exit_free_irq:
|
||||
disable_fiq(irq);
|
||||
mxc_set_irq_fiq(irq, 0);
|
||||
release_fiq(&fh);
|
||||
exit_free_dma:
|
||||
imx_dma_free(pcdev->dma_chan);
|
||||
exit_iounmap:
|
||||
iounmap(base);
|
||||
exit_release:
|
||||
release_mem_region(res->start, resource_size(res));
|
||||
exit_kfree:
|
||||
kfree(pcdev);
|
||||
exit_put_clk:
|
||||
clk_put(clk);
|
||||
exit:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __exit mx1_camera_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct mx1_camera_dev *pcdev = platform_get_drvdata(pdev);
|
||||
struct resource *res;
|
||||
|
||||
imx_dma_free(pcdev->dma_chan);
|
||||
disable_fiq(pcdev->irq);
|
||||
mxc_set_irq_fiq(pcdev->irq, 0);
|
||||
release_fiq(&fh);
|
||||
|
||||
clk_put(pcdev->clk);
|
||||
|
||||
soc_camera_host_unregister(&mx1_soc_camera_host);
|
||||
|
||||
iounmap(pcdev->base);
|
||||
|
||||
res = pcdev->res;
|
||||
release_mem_region(res->start, resource_size(res));
|
||||
|
||||
kfree(pcdev);
|
||||
|
||||
dev_info(&pdev->dev, "MX1 Camera driver unloaded\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver mx1_camera_driver = {
|
||||
.driver = {
|
||||
.name = DRIVER_NAME,
|
||||
},
|
||||
.remove = __exit_p(mx1_camera_remove),
|
||||
};
|
||||
|
||||
static int __init mx1_camera_init(void)
|
||||
{
|
||||
return platform_driver_probe(&mx1_camera_driver, mx1_camera_probe);
|
||||
}
|
||||
|
||||
static void __exit mx1_camera_exit(void)
|
||||
{
|
||||
return platform_driver_unregister(&mx1_camera_driver);
|
||||
}
|
||||
|
||||
module_init(mx1_camera_init);
|
||||
module_exit(mx1_camera_exit);
|
||||
|
||||
MODULE_DESCRIPTION("i.MX1/i.MXL SoC Camera Host driver");
|
||||
MODULE_AUTHOR("Paulius Zaleckas <paulius.zaleckas@teltonika.lt>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("platform:" DRIVER_NAME);
|
||||
Loading…
Reference in a new issue