[PATCH v2 11/34] media: mx1_camera: remove the driver
Mauro Carvalho Chehab
mchehab at redhat.com
Thu Sep 20 08:56:34 EDT 2012
Em 20-09-2012 03:45, Shawn Guo escreveu:
> The mx1_camera driver has been broken for a few release cycles since
> commit 6bd0812 (dmaengine: imx-dma: merge old dma-v1.c with imx-dma.c).
> It seems there is no one even compile tested it since then, as doing
> so will end up with the following error.
>
> CC drivers/media/video/mx1_camera.o
> In file included from drivers/media/video/mx1_camera.c:44:0:
> arch/arm/mach-imx/include/mach/dma-mx1-mx2.h:8:25: fatal error: mach/dma-v1.h: No such file or directory
>
> It looks that all the related folks have known the breakage [1], but
> no one shows the interest to bring it back to work. Thus it becomes
> a piece of unmaintained code, so let's remove it.
It is better to mark it as BROKEN for the next Kernel, and then to
move it to staging, before dropping a broken driver. That gives people
some time to fix it, if someone has interests on fixing the issues.
>
> [1] https://lkml.org/lkml/2012/2/9/171
>
> Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
> Cc: Paulius Zaleckas <paulius.zaleckas at teltonika.lt>
> Cc: Guennadi Liakhovetski <g.liakhovetski at gmx.de>
> Cc: Mauro Carvalho Chehab <mchehab at redhat.com>
> Cc: linux-media at vger.kernel.org
> ---
> arch/arm/mach-imx/Makefile | 3 -
> arch/arm/mach-imx/clk-imx1.c | 1 -
> arch/arm/mach-imx/devices/Kconfig | 3 -
> arch/arm/mach-imx/devices/Makefile | 1 -
> arch/arm/mach-imx/devices/devices-common.h | 10 -
> arch/arm/mach-imx/devices/platform-mx1-camera.c | 42 --
> arch/arm/mach-imx/mx1-camera-fiq-ksym.c | 18 -
> arch/arm/mach-imx/mx1-camera-fiq.S | 35 -
> drivers/media/video/Kconfig | 12 -
> drivers/media/video/Makefile | 1 -
> drivers/media/video/mx1_camera.c | 889 -----------------------
Btw, this conflicts with the tree renaming patches already at -staging, as
this driver location is elsewhere.
Regards,
Mauro
> include/linux/platform_data/camera-mx1.h | 35 -
> 12 files changed, 1050 deletions(-)
> delete mode 100644 arch/arm/mach-imx/devices/platform-mx1-camera.c
> delete mode 100644 arch/arm/mach-imx/mx1-camera-fiq-ksym.c
> delete mode 100644 arch/arm/mach-imx/mx1-camera-fiq.S
> delete mode 100644 drivers/media/video/mx1_camera.c
> delete mode 100644 include/linux/platform_data/camera-mx1.h
>
> diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
> index fe47b71..538d0ee 100644
> --- a/arch/arm/mach-imx/Makefile
> +++ b/arch/arm/mach-imx/Makefile
> @@ -35,9 +35,6 @@ obj-y += ssi-fiq.o
> obj-y += ssi-fiq-ksym.o
> endif
>
> -# Support for CMOS sensor interface
> -obj-$(CONFIG_MX1_VIDEO) += mx1-camera-fiq.o mx1-camera-fiq-ksym.o
> -
> # i.MX1 based machines
> obj-$(CONFIG_ARCH_MX1ADS) += mach-mx1ads.o
> obj-$(CONFIG_MACH_SCB9328) += mach-scb9328.o
> diff --git a/arch/arm/mach-imx/clk-imx1.c b/arch/arm/mach-imx/clk-imx1.c
> index b5f90cc..ebfffd2 100644
> --- a/arch/arm/mach-imx/clk-imx1.c
> +++ b/arch/arm/mach-imx/clk-imx1.c
> @@ -84,7 +84,6 @@ int __init mx1_clocks_init(unsigned long fref)
> i, PTR_ERR(clk[i]));
>
> clk_register_clkdev(clk[dma_gate], "ahb", "imx-dma");
> - clk_register_clkdev(clk[csi_gate], NULL, "mx1-camera.0");
> clk_register_clkdev(clk[mma_gate], "mma", NULL);
> clk_register_clkdev(clk[usbd_gate], NULL, "imx_udc.0");
> clk_register_clkdev(clk[per1], "per", "imx-gpt.0");
> diff --git a/arch/arm/mach-imx/devices/Kconfig b/arch/arm/mach-imx/devices/Kconfig
> index cb3e3ee..09d796e 100644
> --- a/arch/arm/mach-imx/devices/Kconfig
> +++ b/arch/arm/mach-imx/devices/Kconfig
> @@ -46,9 +46,6 @@ config IMX_HAVE_PLATFORM_IMX_UDC
> config IMX_HAVE_PLATFORM_IPU_CORE
> bool
>
> -config IMX_HAVE_PLATFORM_MX1_CAMERA
> - bool
> -
> config IMX_HAVE_PLATFORM_MX2_CAMERA
> bool
>
> diff --git a/arch/arm/mach-imx/devices/Makefile b/arch/arm/mach-imx/devices/Makefile
> index ff22ed1..3cfdc37 100644
> --- a/arch/arm/mach-imx/devices/Makefile
> +++ b/arch/arm/mach-imx/devices/Makefile
> @@ -17,7 +17,6 @@ obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_SSI) += platform-imx-ssi.o
> obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_UART) += platform-imx-uart.o
> obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_UDC) += platform-imx_udc.o
> obj-$(CONFIG_IMX_HAVE_PLATFORM_IPU_CORE) += platform-ipu-core.o
> -obj-$(CONFIG_IMX_HAVE_PLATFORM_MX1_CAMERA) += platform-mx1-camera.o
> obj-$(CONFIG_IMX_HAVE_PLATFORM_MX2_CAMERA) += platform-mx2-camera.o
> obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_EHCI) += platform-mxc-ehci.o
> obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_MMC) += platform-mxc-mmc.o
> diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
> index 9e3e3d8..34419b2 100644
> --- a/arch/arm/mach-imx/devices/devices-common.h
> +++ b/arch/arm/mach-imx/devices/devices-common.h
> @@ -199,16 +199,6 @@ struct platform_device *__init imx_add_mx3_sdc_fb(
> const struct imx_ipu_core_data *data,
> struct mx3fb_platform_data *pdata);
>
> -#include <linux/platform_data/camera-mx1.h>
> -struct imx_mx1_camera_data {
> - resource_size_t iobase;
> - resource_size_t iosize;
> - resource_size_t irq;
> -};
> -struct platform_device *__init imx_add_mx1_camera(
> - const struct imx_mx1_camera_data *data,
> - const struct mx1_camera_pdata *pdata);
> -
> #include <linux/platform_data/camera-mx2.h>
> struct imx_mx2_camera_data {
> resource_size_t iobasecsi;
> diff --git a/arch/arm/mach-imx/devices/platform-mx1-camera.c b/arch/arm/mach-imx/devices/platform-mx1-camera.c
> deleted file mode 100644
> index 756b0e6..0000000
> --- a/arch/arm/mach-imx/devices/platform-mx1-camera.c
> +++ /dev/null
> @@ -1,42 +0,0 @@
> -/*
> - * Copyright (C) 2010 Pengutronix
> - * Uwe Kleine-Koenig <u.kleine-koenig at pengutronix.de>
> - *
> - * This program is free software; you can redistribute it and/or modify it under
> - * the terms of the GNU General Public License version 2 as published by the
> - * Free Software Foundation.
> - */
> -#include <mach/hardware.h>
> -#include "devices-common.h"
> -
> -#define imx_mx1_camera_data_entry_single(soc, _size) \
> - { \
> - .iobase = soc ## _CSI ## _BASE_ADDR, \
> - .iosize = _size, \
> - .irq = soc ## _INT_CSI, \
> - }
> -
> -#ifdef CONFIG_SOC_IMX1
> -const struct imx_mx1_camera_data imx1_mx1_camera_data __initconst =
> - imx_mx1_camera_data_entry_single(MX1, 10);
> -#endif /* ifdef CONFIG_SOC_IMX1 */
> -
> -struct platform_device *__init imx_add_mx1_camera(
> - const struct imx_mx1_camera_data *data,
> - const struct mx1_camera_pdata *pdata)
> -{
> - struct resource res[] = {
> - {
> - .start = data->iobase,
> - .end = data->iobase + data->iosize - 1,
> - .flags = IORESOURCE_MEM,
> - }, {
> - .start = data->irq,
> - .end = data->irq,
> - .flags = IORESOURCE_IRQ,
> - },
> - };
> - return imx_add_platform_device_dmamask("mx1-camera", 0,
> - res, ARRAY_SIZE(res),
> - pdata, sizeof(*pdata), DMA_BIT_MASK(32));
> -}
> diff --git a/arch/arm/mach-imx/mx1-camera-fiq-ksym.c b/arch/arm/mach-imx/mx1-camera-fiq-ksym.c
> deleted file mode 100644
> index fb38436..0000000
> --- a/arch/arm/mach-imx/mx1-camera-fiq-ksym.c
> +++ /dev/null
> @@ -1,18 +0,0 @@
> -/*
> - * Exported ksyms of ARCH_MX1
> - *
> - * Copyright (C) 2008, Darius Augulis <augulis.darius at gmail.com>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - */
> -
> -#include <linux/platform_device.h>
> -#include <linux/module.h>
> -
> -#include <linux/platform_data/camera-mx1.h>
> -
> -/* IMX camera FIQ handler */
> -EXPORT_SYMBOL(mx1_camera_sof_fiq_start);
> -EXPORT_SYMBOL(mx1_camera_sof_fiq_end);
> diff --git a/arch/arm/mach-imx/mx1-camera-fiq.S b/arch/arm/mach-imx/mx1-camera-fiq.S
> deleted file mode 100644
> index 9c69aa6..0000000
> --- a/arch/arm/mach-imx/mx1-camera-fiq.S
> +++ /dev/null
> @@ -1,35 +0,0 @@
> -/*
> - * Copyright (C) 2008 Paulius Zaleckas <paulius.zaleckas at teltonika.lt>
> - *
> - * Based on linux/arch/arm/lib/floppydma.S
> - * Copyright (C) 1995, 1996 Russell King
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - */
> -#include <linux/linkage.h>
> -#include <asm/assembler.h>
> -
> - .text
> - .global mx1_camera_sof_fiq_end
> - .global mx1_camera_sof_fiq_start
> -mx1_camera_sof_fiq_start:
> - @ enable dma
> - ldr r12, [r9]
> - orr r12, r12, #0x00000001
> - str r12, [r9]
> - @ unmask DMA interrupt
> - ldr r12, [r8]
> - bic r12, r12, r13
> - str r12, [r8]
> - @ disable SOF interrupt
> - ldr r12, [r10]
> - bic r12, r12, #0x00010000
> - str r12, [r10]
> - @ clear SOF flag
> - mov r12, #0x00010000
> - str r12, [r11]
> - @ return from FIQ
> - subs pc, lr, #4
> -mx1_camera_sof_fiq_end:
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index c128fac..e8b89a9 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -1118,18 +1118,6 @@ config SOC_CAMERA_OV9740
> help
> This is a ov9740 camera driver
>
> -config MX1_VIDEO
> - bool
> -
> -config VIDEO_MX1
> - tristate "i.MX1/i.MXL CMOS Sensor Interface driver"
> - depends on VIDEO_DEV && ARCH_MX1 && SOC_CAMERA
> - select FIQ
> - select VIDEOBUF_DMA_CONTIG
> - select MX1_VIDEO
> - ---help---
> - This is a v4l2 driver for the i.MX1/i.MXL CMOS Sensor Interface
> -
> config MX3_VIDEO
> bool
>
> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
> index b7da9fa..8624228 100644
> --- a/drivers/media/video/Makefile
> +++ b/drivers/media/video/Makefile
> @@ -178,7 +178,6 @@ obj-$(CONFIG_VIDEO_OMAP2) += omap2cam.o
> obj-$(CONFIG_SOC_CAMERA) += soc_camera.o soc_mediabus.o
> obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o
> # soc-camera host drivers have to be linked after camera drivers
> -obj-$(CONFIG_VIDEO_MX1) += mx1_camera.o
> obj-$(CONFIG_VIDEO_MX2) += mx2_camera.o
> obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o
> obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
> diff --git a/drivers/media/video/mx1_camera.c b/drivers/media/video/mx1_camera.c
> deleted file mode 100644
> index bbe7099..0000000
> --- a/drivers/media/video/mx1_camera.c
> +++ /dev/null
> @@ -1,889 +0,0 @@
> -/*
> - * V4L2 Driver for i.MXL/i.MXL camera (CSI) host
> - *
> - * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas at teltonika.lt>
> - * Copyright (C) 2009, Darius Augulis <augulis.darius at gmail.com>
> - *
> - * Based on PXA SoC camera driver
> - * Copyright (C) 2006, Sascha Hauer, Pengutronix
> - * Copyright (C) 2008, Guennadi Liakhovetski <kernel at pengutronix.de>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - */
> -
> -#include <linux/clk.h>
> -#include <linux/delay.h>
> -#include <linux/device.h>
> -#include <linux/dma-mapping.h>
> -#include <linux/errno.h>
> -#include <linux/fs.h>
> -#include <linux/init.h>
> -#include <linux/interrupt.h>
> -#include <linux/io.h>
> -#include <linux/kernel.h>
> -#include <linux/mm.h>
> -#include <linux/module.h>
> -#include <linux/moduleparam.h>
> -#include <linux/mutex.h>
> -#include <linux/platform_device.h>
> -#include <linux/sched.h>
> -#include <linux/slab.h>
> -#include <linux/time.h>
> -#include <linux/videodev2.h>
> -
> -#include <media/soc_camera.h>
> -#include <media/v4l2-common.h>
> -#include <media/v4l2-dev.h>
> -#include <media/videobuf-dma-contig.h>
> -#include <media/soc_mediabus.h>
> -
> -#include <asm/dma.h>
> -#include <asm/fiq.h>
> -#include <mach/dma-mx1-mx2.h>
> -#include <mach/hardware.h>
> -#include <mach/irqs.h>
> -#include <linux/platform_data/camera-mx1.h>
> -
> -/*
> - * CSI registers
> - */
> -#define CSICR1 0x00 /* CSI Control Register 1 */
> -#define CSISR 0x08 /* CSI Status Register */
> -#define CSIRXR 0x10 /* CSI RxFIFO Register */
> -
> -#define CSICR1_RXFF_LEVEL(x) (((x) & 0x3) << 19)
> -#define CSICR1_SOF_POL (1 << 17)
> -#define CSICR1_SOF_INTEN (1 << 16)
> -#define CSICR1_MCLKDIV(x) (((x) & 0xf) << 12)
> -#define CSICR1_MCLKEN (1 << 9)
> -#define CSICR1_FCC (1 << 8)
> -#define CSICR1_BIG_ENDIAN (1 << 7)
> -#define CSICR1_CLR_RXFIFO (1 << 5)
> -#define CSICR1_GCLK_MODE (1 << 4)
> -#define CSICR1_DATA_POL (1 << 2)
> -#define CSICR1_REDGE (1 << 1)
> -#define CSICR1_EN (1 << 0)
> -
> -#define CSISR_SFF_OR_INT (1 << 25)
> -#define CSISR_RFF_OR_INT (1 << 24)
> -#define CSISR_STATFF_INT (1 << 21)
> -#define CSISR_RXFF_INT (1 << 18)
> -#define CSISR_SOF_INT (1 << 16)
> -#define CSISR_DRDY (1 << 0)
> -
> -#define DRIVER_VERSION "0.0.2"
> -#define DRIVER_NAME "mx1-camera"
> -
> -#define CSI_IRQ_MASK (CSISR_SFF_OR_INT | CSISR_RFF_OR_INT | \
> - CSISR_STATFF_INT | CSISR_RXFF_INT | CSISR_SOF_INT)
> -
> -#define CSI_BUS_FLAGS (V4L2_MBUS_MASTER | V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
> - V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW | \
> - V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING | \
> - V4L2_MBUS_DATA_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_LOW)
> -
> -#define MAX_VIDEO_MEM 16 /* Video memory limit in megabytes */
> -
> -/*
> - * Structures
> - */
> -
> -/* buffer for one video frame */
> -struct mx1_buffer {
> - /* common v4l buffer stuff -- must be first */
> - struct videobuf_buffer vb;
> - enum v4l2_mbus_pixelcode code;
> - int inwork;
> -};
> -
> -/*
> - * i.MX1/i.MXL is only supposed to handle one camera on its Camera Sensor
> - * Interface. If anyone ever builds hardware to enable more than
> - * one camera, they will have to modify this driver too
> - */
> -struct mx1_camera_dev {
> - struct soc_camera_host soc_host;
> - struct soc_camera_device *icd;
> - struct mx1_camera_pdata *pdata;
> - struct mx1_buffer *active;
> - struct resource *res;
> - struct clk *clk;
> - struct list_head capture;
> -
> - void __iomem *base;
> - int dma_chan;
> - unsigned int irq;
> - unsigned long mclk;
> -
> - spinlock_t lock;
> -};
> -
> -/*
> - * Videobuf operations
> - */
> -static int mx1_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
> - unsigned int *size)
> -{
> - struct soc_camera_device *icd = vq->priv_data;
> -
> - *size = icd->sizeimage;
> -
> - if (!*count)
> - *count = 32;
> -
> - if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
> - *count = (MAX_VIDEO_MEM * 1024 * 1024) / *size;
> -
> - dev_dbg(icd->parent, "count=%d, size=%d\n", *count, *size);
> -
> - return 0;
> -}
> -
> -static void free_buffer(struct videobuf_queue *vq, struct mx1_buffer *buf)
> -{
> - struct soc_camera_device *icd = vq->priv_data;
> - struct videobuf_buffer *vb = &buf->vb;
> -
> - BUG_ON(in_interrupt());
> -
> - dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
> - vb, vb->baddr, vb->bsize);
> -
> - /*
> - * This waits until this buffer is out of danger, i.e., until it is no
> - * longer in STATE_QUEUED or STATE_ACTIVE
> - */
> - videobuf_waiton(vq, vb, 0, 0);
> - videobuf_dma_contig_free(vq, vb);
> -
> - vb->state = VIDEOBUF_NEEDS_INIT;
> -}
> -
> -static int mx1_videobuf_prepare(struct videobuf_queue *vq,
> - struct videobuf_buffer *vb, enum v4l2_field field)
> -{
> - struct soc_camera_device *icd = vq->priv_data;
> - struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb);
> - int ret;
> -
> - dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
> - vb, vb->baddr, vb->bsize);
> -
> - /* Added list head initialization on alloc */
> - WARN_ON(!list_empty(&vb->queue));
> -
> - BUG_ON(NULL == icd->current_fmt);
> -
> - /*
> - * I think, in buf_prepare you only have to protect global data,
> - * the actual buffer is yours
> - */
> - buf->inwork = 1;
> -
> - if (buf->code != icd->current_fmt->code ||
> - vb->width != icd->user_width ||
> - vb->height != icd->user_height ||
> - vb->field != field) {
> - buf->code = icd->current_fmt->code;
> - vb->width = icd->user_width;
> - vb->height = icd->user_height;
> - vb->field = field;
> - vb->state = VIDEOBUF_NEEDS_INIT;
> - }
> -
> - vb->size = icd->sizeimage;
> - if (0 != vb->baddr && vb->bsize < vb->size) {
> - ret = -EINVAL;
> - goto out;
> - }
> -
> - if (vb->state == VIDEOBUF_NEEDS_INIT) {
> - ret = videobuf_iolock(vq, vb, NULL);
> - if (ret)
> - goto fail;
> -
> - vb->state = VIDEOBUF_PREPARED;
> - }
> -
> - buf->inwork = 0;
> -
> - return 0;
> -
> -fail:
> - free_buffer(vq, buf);
> -out:
> - buf->inwork = 0;
> - return ret;
> -}
> -
> -static int mx1_camera_setup_dma(struct mx1_camera_dev *pcdev)
> -{
> - struct videobuf_buffer *vbuf = &pcdev->active->vb;
> - struct device *dev = pcdev->icd->parent;
> - int ret;
> -
> - if (unlikely(!pcdev->active)) {
> - dev_err(dev, "DMA End IRQ with no active buffer\n");
> - return -EFAULT;
> - }
> -
> - /* setup sg list for future DMA */
> - ret = imx_dma_setup_single(pcdev->dma_chan,
> - videobuf_to_dma_contig(vbuf),
> - vbuf->size, pcdev->res->start +
> - CSIRXR, DMA_MODE_READ);
> - if (unlikely(ret))
> - dev_err(dev, "Failed to setup DMA sg list\n");
> -
> - return ret;
> -}
> -
> -/* Called under spinlock_irqsave(&pcdev->lock, ...) */
> -static void mx1_videobuf_queue(struct videobuf_queue *vq,
> - struct videobuf_buffer *vb)
> -{
> - struct soc_camera_device *icd = vq->priv_data;
> - struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> - struct mx1_camera_dev *pcdev = ici->priv;
> - struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb);
> -
> - dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
> - vb, vb->baddr, vb->bsize);
> -
> - list_add_tail(&vb->queue, &pcdev->capture);
> -
> - vb->state = VIDEOBUF_ACTIVE;
> -
> - 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);
> - }
> - }
> -}
> -
> -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;
> - struct device *dev = icd->parent;
> -
> - dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
> - vb, vb->baddr, vb->bsize);
> -
> - switch (vb->state) {
> - case VIDEOBUF_ACTIVE:
> - dev_dbg(dev, "%s (active)\n", __func__);
> - break;
> - case VIDEOBUF_QUEUED:
> - dev_dbg(dev, "%s (queued)\n", __func__);
> - break;
> - case VIDEOBUF_PREPARED:
> - dev_dbg(dev, "%s (prepared)\n", __func__);
> - break;
> - default:
> - dev_dbg(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 device *dev = pcdev->icd->parent;
> - 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(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(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->parent);
> - struct mx1_camera_dev *pcdev = ici->priv;
> -
> - videobuf_queue_dma_contig_init(q, &mx1_videobuf_ops, icd->parent,
> - &pcdev->lock, V4L2_BUF_TYPE_VIDEO_CAPTURE,
> - V4L2_FIELD_NONE,
> - sizeof(struct mx1_buffer), icd, &icd->video_lock);
> -}
> -
> -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->icd->parent,
> - "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->icd->parent, "Activate device\n");
> -
> - clk_prepare_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->icd->parent, "Deactivate device\n");
> -
> - /* Disable all CSI interface */
> - __raw_writel(0x00, pcdev->base + CSICR1);
> -
> - clk_disable_unprepare(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->parent);
> - struct mx1_camera_dev *pcdev = ici->priv;
> -
> - if (pcdev->icd)
> - return -EBUSY;
> -
> - dev_info(icd->parent, "MX1 Camera driver attached to camera %d\n",
> - icd->devnum);
> -
> - mx1_camera_activate(pcdev);
> -
> - pcdev->icd = icd;
> -
> - return 0;
> -}
> -
> -static void mx1_camera_remove_device(struct soc_camera_device *icd)
> -{
> - struct soc_camera_host *ici = to_soc_camera_host(icd->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->parent, "MX1 Camera driver detached from camera %d\n",
> - icd->devnum);
> -
> - mx1_camera_deactivate(pcdev);
> -
> - pcdev->icd = NULL;
> -}
> -
> -static int mx1_camera_set_crop(struct soc_camera_device *icd,
> - struct v4l2_crop *a)
> -{
> - struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
> -
> - return v4l2_subdev_call(sd, video, s_crop, a);
> -}
> -
> -static int mx1_camera_set_bus_param(struct soc_camera_device *icd)
> -{
> - struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
> - struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> - struct mx1_camera_dev *pcdev = ici->priv;
> - struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
> - unsigned long common_flags;
> - unsigned int csicr1;
> - int ret;
> -
> - /* MX1 supports only 8bit buswidth */
> - ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
> - if (!ret) {
> - common_flags = soc_mbus_config_compatible(&cfg, CSI_BUS_FLAGS);
> - if (!common_flags) {
> - dev_warn(icd->parent,
> - "Flags incompatible: camera 0x%x, host 0x%x\n",
> - cfg.flags, CSI_BUS_FLAGS);
> - return -EINVAL;
> - }
> - } else if (ret != -ENOIOCTLCMD) {
> - return ret;
> - } else {
> - common_flags = CSI_BUS_FLAGS;
> - }
> -
> - /* Make choises, based on platform choice */
> - if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
> - (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
> - if (!pcdev->pdata ||
> - pcdev->pdata->flags & MX1_CAMERA_VSYNC_HIGH)
> - common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
> - else
> - common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
> - }
> -
> - if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
> - (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
> - if (!pcdev->pdata ||
> - pcdev->pdata->flags & MX1_CAMERA_PCLK_RISING)
> - common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
> - else
> - common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
> - }
> -
> - if ((common_flags & V4L2_MBUS_DATA_ACTIVE_HIGH) &&
> - (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW)) {
> - if (!pcdev->pdata ||
> - pcdev->pdata->flags & MX1_CAMERA_DATA_HIGH)
> - common_flags &= ~V4L2_MBUS_DATA_ACTIVE_LOW;
> - else
> - common_flags &= ~V4L2_MBUS_DATA_ACTIVE_HIGH;
> - }
> -
> - cfg.flags = common_flags;
> - ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
> - if (ret < 0 && ret != -ENOIOCTLCMD) {
> - dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
> - common_flags, ret);
> - return ret;
> - }
> -
> - csicr1 = __raw_readl(pcdev->base + CSICR1);
> -
> - if (common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
> - csicr1 |= CSICR1_REDGE;
> - if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
> - csicr1 |= CSICR1_SOF_POL;
> - if (common_flags & V4L2_MBUS_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 v4l2_subdev *sd = soc_camera_to_subdev(icd);
> - const struct soc_camera_format_xlate *xlate;
> - struct v4l2_pix_format *pix = &f->fmt.pix;
> - struct v4l2_mbus_framefmt mf;
> - int ret, buswidth;
> -
> - xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
> - if (!xlate) {
> - dev_warn(icd->parent, "Format %x not found\n",
> - pix->pixelformat);
> - return -EINVAL;
> - }
> -
> - buswidth = xlate->host_fmt->bits_per_sample;
> - if (buswidth > 8) {
> - dev_warn(icd->parent,
> - "bits-per-sample %d for format %x unsupported\n",
> - buswidth, pix->pixelformat);
> - return -EINVAL;
> - }
> -
> - mf.width = pix->width;
> - mf.height = pix->height;
> - mf.field = pix->field;
> - mf.colorspace = pix->colorspace;
> - mf.code = xlate->code;
> -
> - ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
> - if (ret < 0)
> - return ret;
> -
> - if (mf.code != xlate->code)
> - return -EINVAL;
> -
> - pix->width = mf.width;
> - pix->height = mf.height;
> - pix->field = mf.field;
> - pix->colorspace = mf.colorspace;
> - icd->current_fmt = xlate;
> -
> - return ret;
> -}
> -
> -static int mx1_camera_try_fmt(struct soc_camera_device *icd,
> - struct v4l2_format *f)
> -{
> - struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
> - const struct soc_camera_format_xlate *xlate;
> - struct v4l2_pix_format *pix = &f->fmt.pix;
> - struct v4l2_mbus_framefmt mf;
> - int ret;
> - /* TODO: limit to mx1 hardware capabilities */
> -
> - xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
> - if (!xlate) {
> - dev_warn(icd->parent, "Format %x not found\n",
> - pix->pixelformat);
> - return -EINVAL;
> - }
> -
> - mf.width = pix->width;
> - mf.height = pix->height;
> - mf.field = pix->field;
> - mf.colorspace = pix->colorspace;
> - mf.code = xlate->code;
> -
> - /* limit to sensor capabilities */
> - ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
> - if (ret < 0)
> - return ret;
> -
> - pix->width = mf.width;
> - pix->height = mf.height;
> - pix->field = mf.field;
> - pix->colorspace = mf.colorspace;
> -
> - return 0;
> -}
> -
> -static int mx1_camera_reqbufs(struct soc_camera_device *icd,
> - 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(icd->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_device *icd = file->private_data;
> - struct mx1_buffer *buf;
> -
> - buf = list_entry(icd->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->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,
> -};
> -
> -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 || (int)irq <= 0) {
> - 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;
> - }
> -
> - 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;
> -
> - /* request dma */
> - pcdev->dma_chan = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_HIGH);
> - if (pcdev->dma_chan < 0) {
> - dev_err(&pdev->dev, "Can't request DMA for MX1 CSI\n");
> - err = -EBUSY;
> - goto exit_iounmap;
> - }
> - dev_dbg(&pdev->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, MX1_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(&pdev->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 = (long)MX1_DMA_DIMR;
> - regs.ARM_r9 = (long)MX1_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);
> -
> - pcdev->soc_host.drv_name = DRIVER_NAME;
> - pcdev->soc_host.ops = &mx1_soc_camera_host_ops;
> - pcdev->soc_host.priv = pcdev;
> - pcdev->soc_host.v4l2_dev.dev = &pdev->dev;
> - pcdev->soc_host.nr = pdev->id;
> - err = soc_camera_host_register(&pcdev->soc_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 soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
> - struct mx1_camera_dev *pcdev = container_of(soc_host,
> - struct mx1_camera_dev, soc_host);
> - 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(soc_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 at teltonika.lt>");
> -MODULE_LICENSE("GPL v2");
> -MODULE_VERSION(DRIVER_VERSION);
> -MODULE_ALIAS("platform:" DRIVER_NAME);
> diff --git a/include/linux/platform_data/camera-mx1.h b/include/linux/platform_data/camera-mx1.h
> deleted file mode 100644
> index 4fd6c70..0000000
> --- a/include/linux/platform_data/camera-mx1.h
> +++ /dev/null
> @@ -1,35 +0,0 @@
> -/*
> - * mx1_camera.h - i.MX1/i.MXL camera driver header file
> - *
> - * Copyright (c) 2008, Paulius Zaleckas <paulius.zaleckas at teltonika.lt>
> - * Copyright (C) 2009, Darius Augulis <augulis.darius at gmail.com>
> - *
> - * Based on PXA camera.h file:
> - * Copyright (C) 2003, Intel Corporation
> - * Copyright (C) 2008, Guennadi Liakhovetski <kernel at pengutronix.de>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - */
> -
> -#ifndef __ASM_ARCH_CAMERA_H_
> -#define __ASM_ARCH_CAMERA_H_
> -
> -#define MX1_CAMERA_DATA_HIGH 1
> -#define MX1_CAMERA_PCLK_RISING 2
> -#define MX1_CAMERA_VSYNC_HIGH 4
> -
> -extern unsigned char mx1_camera_sof_fiq_start, mx1_camera_sof_fiq_end;
> -
> -/**
> - * struct mx1_camera_pdata - i.MX1/i.MXL camera platform data
> - * @mclk_10khz: master clock frequency in 10kHz units
> - * @flags: MX1 camera platform flags
> - */
> -struct mx1_camera_pdata {
> - unsigned long mclk_10khz;
> - unsigned long flags;
> -};
> -
> -#endif /* __ASM_ARCH_CAMERA_H_ */
>
More information about the linux-arm-kernel
mailing list