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![Arnd Bergmann](/assets/img/avatar_default.png)
MMIO registers are __iomem tokens in virtual address space, not integers. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1881 lines
43 KiB
C
1881 lines
43 KiB
C
/*
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* drivers/media/video/omap24xxcam.c
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*
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* OMAP 2 camera block driver.
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*
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* Copyright (C) 2004 MontaVista Software, Inc.
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* Copyright (C) 2004 Texas Instruments.
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* Copyright (C) 2007-2008 Nokia Corporation.
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*
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* Contact: Sakari Ailus <sakari.ailus@nokia.com>
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*
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* Based on code from Andy Lowe <source@mvista.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/videodev2.h>
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#include <linux/pci.h> /* needed for videobufs */
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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#include "omap24xxcam.h"
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#define OMAP24XXCAM_VERSION "0.0.1"
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#define RESET_TIMEOUT_NS 10000
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static void omap24xxcam_reset(struct omap24xxcam_device *cam);
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static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam);
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static void omap24xxcam_device_unregister(struct v4l2_int_device *s);
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static int omap24xxcam_remove(struct platform_device *pdev);
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/* module parameters */
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static int video_nr = -1; /* video device minor (-1 ==> auto assign) */
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/*
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* Maximum amount of memory to use for capture buffers.
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* Default is 4800KB, enough to double-buffer SXGA.
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*/
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static int capture_mem = 1280 * 960 * 2 * 2;
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static struct v4l2_int_device omap24xxcam;
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/*
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*
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* Clocks.
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*
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*/
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static void omap24xxcam_clock_put(struct omap24xxcam_device *cam)
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{
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if (cam->ick != NULL && !IS_ERR(cam->ick))
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clk_put(cam->ick);
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if (cam->fck != NULL && !IS_ERR(cam->fck))
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clk_put(cam->fck);
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cam->ick = cam->fck = NULL;
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}
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static int omap24xxcam_clock_get(struct omap24xxcam_device *cam)
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{
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int rval = 0;
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cam->fck = clk_get(cam->dev, "fck");
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if (IS_ERR(cam->fck)) {
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dev_err(cam->dev, "can't get camera fck");
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rval = PTR_ERR(cam->fck);
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omap24xxcam_clock_put(cam);
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return rval;
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}
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cam->ick = clk_get(cam->dev, "ick");
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if (IS_ERR(cam->ick)) {
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dev_err(cam->dev, "can't get camera ick");
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rval = PTR_ERR(cam->ick);
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omap24xxcam_clock_put(cam);
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}
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return rval;
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}
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static void omap24xxcam_clock_on(struct omap24xxcam_device *cam)
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{
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clk_enable(cam->fck);
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clk_enable(cam->ick);
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}
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static void omap24xxcam_clock_off(struct omap24xxcam_device *cam)
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{
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clk_disable(cam->fck);
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clk_disable(cam->ick);
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}
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/*
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*
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* Camera core
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*
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*/
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/*
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* Set xclk.
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*
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* To disable xclk, use value zero.
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*/
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static void omap24xxcam_core_xclk_set(const struct omap24xxcam_device *cam,
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u32 xclk)
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{
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if (xclk) {
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u32 divisor = CAM_MCLK / xclk;
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if (divisor == 1)
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET,
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CC_CTRL_XCLK,
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CC_CTRL_XCLK_DIV_BYPASS);
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else
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET,
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CC_CTRL_XCLK, divisor);
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} else
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET,
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CC_CTRL_XCLK, CC_CTRL_XCLK_DIV_STABLE_LOW);
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}
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static void omap24xxcam_core_hwinit(const struct omap24xxcam_device *cam)
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{
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/*
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* Setting the camera core AUTOIDLE bit causes problems with frame
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* synchronization, so we will clear the AUTOIDLE bit instead.
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*/
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_SYSCONFIG,
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CC_SYSCONFIG_AUTOIDLE);
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/* program the camera interface DMA packet size */
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL_DMA,
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CC_CTRL_DMA_EN | (DMA_THRESHOLD / 4 - 1));
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/* enable camera core error interrupts */
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQENABLE,
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CC_IRQENABLE_FW_ERR_IRQ
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| CC_IRQENABLE_FSC_ERR_IRQ
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| CC_IRQENABLE_SSC_ERR_IRQ
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| CC_IRQENABLE_FIFO_OF_IRQ);
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}
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/*
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* Enable the camera core.
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*
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* Data transfer to the camera DMA starts from next starting frame.
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*/
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static void omap24xxcam_core_enable(const struct omap24xxcam_device *cam)
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{
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL,
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cam->cc_ctrl);
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}
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/*
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* Disable camera core.
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*
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* The data transfer will be stopped immediately (CC_CTRL_CC_RST). The
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* core internal state machines will be reset. Use
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* CC_CTRL_CC_FRAME_TRIG instead if you want to transfer the current
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* frame completely.
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*/
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static void omap24xxcam_core_disable(const struct omap24xxcam_device *cam)
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{
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL,
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CC_CTRL_CC_RST);
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}
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/* Interrupt service routine for camera core interrupts. */
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static void omap24xxcam_core_isr(struct omap24xxcam_device *cam)
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{
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u32 cc_irqstatus;
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const u32 cc_irqstatus_err =
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CC_IRQSTATUS_FW_ERR_IRQ
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| CC_IRQSTATUS_FSC_ERR_IRQ
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| CC_IRQSTATUS_SSC_ERR_IRQ
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| CC_IRQSTATUS_FIFO_UF_IRQ
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| CC_IRQSTATUS_FIFO_OF_IRQ;
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cc_irqstatus = omap24xxcam_reg_in(cam->mmio_base + CC_REG_OFFSET,
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CC_IRQSTATUS);
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omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQSTATUS,
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cc_irqstatus);
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if (cc_irqstatus & cc_irqstatus_err
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&& !atomic_read(&cam->in_reset)) {
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dev_dbg(cam->dev, "resetting camera, cc_irqstatus 0x%x\n",
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cc_irqstatus);
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omap24xxcam_reset(cam);
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}
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}
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/*
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*
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* videobuf_buffer handling.
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*
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* Memory for mmapped videobuf_buffers is not allocated
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* conventionally, but by several kmalloc allocations and then
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* creating the scatterlist on our own. User-space buffers are handled
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* normally.
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*
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*/
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/*
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* Free the memory-mapped buffer memory allocated for a
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* videobuf_buffer and the associated scatterlist.
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*/
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static void omap24xxcam_vbq_free_mmap_buffer(struct videobuf_buffer *vb)
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{
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struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
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size_t alloc_size;
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struct page *page;
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int i;
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if (dma->sglist == NULL)
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return;
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i = dma->sglen;
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while (i) {
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i--;
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alloc_size = sg_dma_len(&dma->sglist[i]);
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page = sg_page(&dma->sglist[i]);
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do {
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ClearPageReserved(page++);
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} while (alloc_size -= PAGE_SIZE);
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__free_pages(sg_page(&dma->sglist[i]),
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get_order(sg_dma_len(&dma->sglist[i])));
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}
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kfree(dma->sglist);
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dma->sglist = NULL;
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}
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/* Release all memory related to the videobuf_queue. */
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static void omap24xxcam_vbq_free_mmap_buffers(struct videobuf_queue *vbq)
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{
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int i;
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mutex_lock(&vbq->vb_lock);
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for (i = 0; i < VIDEO_MAX_FRAME; i++) {
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if (NULL == vbq->bufs[i])
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continue;
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if (V4L2_MEMORY_MMAP != vbq->bufs[i]->memory)
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continue;
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vbq->ops->buf_release(vbq, vbq->bufs[i]);
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omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]);
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kfree(vbq->bufs[i]);
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vbq->bufs[i] = NULL;
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}
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mutex_unlock(&vbq->vb_lock);
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videobuf_mmap_free(vbq);
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}
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/*
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* Allocate physically as contiguous as possible buffer for video
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* frame and allocate and build DMA scatter-gather list for it.
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*/
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static int omap24xxcam_vbq_alloc_mmap_buffer(struct videobuf_buffer *vb)
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{
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unsigned int order;
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size_t alloc_size, size = vb->bsize; /* vb->bsize is page aligned */
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struct page *page;
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int max_pages, err = 0, i = 0;
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struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
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/*
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* allocate maximum size scatter-gather list. Note this is
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* overhead. We may not use as many entries as we allocate
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*/
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max_pages = vb->bsize >> PAGE_SHIFT;
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dma->sglist = kcalloc(max_pages, sizeof(*dma->sglist), GFP_KERNEL);
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if (dma->sglist == NULL) {
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err = -ENOMEM;
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goto out;
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}
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while (size) {
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order = get_order(size);
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/*
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* do not over-allocate even if we would get larger
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* contiguous chunk that way
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*/
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if ((PAGE_SIZE << order) > size)
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order--;
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/* try to allocate as many contiguous pages as possible */
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page = alloc_pages(GFP_KERNEL, order);
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/* if allocation fails, try to allocate smaller amount */
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while (page == NULL) {
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order--;
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page = alloc_pages(GFP_KERNEL, order);
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if (page == NULL && !order) {
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err = -ENOMEM;
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goto out;
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}
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}
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size -= (PAGE_SIZE << order);
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/* append allocated chunk of pages into scatter-gather list */
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sg_set_page(&dma->sglist[i], page, PAGE_SIZE << order, 0);
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dma->sglen++;
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i++;
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alloc_size = (PAGE_SIZE << order);
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/* clear pages before giving them to user space */
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memset(page_address(page), 0, alloc_size);
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/* mark allocated pages reserved */
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do {
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SetPageReserved(page++);
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} while (alloc_size -= PAGE_SIZE);
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}
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/*
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* REVISIT: not fully correct to assign nr_pages == sglen but
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* video-buf is passing nr_pages for e.g. unmap_sg calls
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*/
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dma->nr_pages = dma->sglen;
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dma->direction = PCI_DMA_FROMDEVICE;
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return 0;
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out:
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omap24xxcam_vbq_free_mmap_buffer(vb);
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return err;
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}
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static int omap24xxcam_vbq_alloc_mmap_buffers(struct videobuf_queue *vbq,
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unsigned int count)
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{
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int i, err = 0;
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struct omap24xxcam_fh *fh =
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container_of(vbq, struct omap24xxcam_fh, vbq);
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mutex_lock(&vbq->vb_lock);
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for (i = 0; i < count; i++) {
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err = omap24xxcam_vbq_alloc_mmap_buffer(vbq->bufs[i]);
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if (err)
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goto out;
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dev_dbg(fh->cam->dev, "sglen is %d for buffer %d\n",
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videobuf_to_dma(vbq->bufs[i])->sglen, i);
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}
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mutex_unlock(&vbq->vb_lock);
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return 0;
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out:
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while (i) {
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i--;
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omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]);
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}
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mutex_unlock(&vbq->vb_lock);
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return err;
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}
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/*
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* This routine is called from interrupt context when a scatter-gather DMA
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* transfer of a videobuf_buffer completes.
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*/
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static void omap24xxcam_vbq_complete(struct omap24xxcam_sgdma *sgdma,
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u32 csr, void *arg)
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{
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struct omap24xxcam_device *cam =
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container_of(sgdma, struct omap24xxcam_device, sgdma);
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struct omap24xxcam_fh *fh = cam->streaming->private_data;
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struct videobuf_buffer *vb = (struct videobuf_buffer *)arg;
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const u32 csr_error = CAMDMA_CSR_MISALIGNED_ERR
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| CAMDMA_CSR_SUPERVISOR_ERR | CAMDMA_CSR_SECURE_ERR
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| CAMDMA_CSR_TRANS_ERR | CAMDMA_CSR_DROP;
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unsigned long flags;
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spin_lock_irqsave(&cam->core_enable_disable_lock, flags);
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if (--cam->sgdma_in_queue == 0)
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omap24xxcam_core_disable(cam);
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spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
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do_gettimeofday(&vb->ts);
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vb->field_count = atomic_add_return(2, &fh->field_count);
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if (csr & csr_error) {
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vb->state = VIDEOBUF_ERROR;
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if (!atomic_read(&fh->cam->in_reset)) {
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dev_dbg(cam->dev, "resetting camera, csr 0x%x\n", csr);
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omap24xxcam_reset(cam);
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}
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} else
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vb->state = VIDEOBUF_DONE;
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wake_up(&vb->done);
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}
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|
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static void omap24xxcam_vbq_release(struct videobuf_queue *vbq,
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struct videobuf_buffer *vb)
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{
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struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
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|
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/* wait for buffer, especially to get out of the sgdma queue */
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videobuf_waiton(vbq, vb, 0, 0);
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if (vb->memory == V4L2_MEMORY_MMAP) {
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dma_unmap_sg(vbq->dev, dma->sglist, dma->sglen,
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dma->direction);
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dma->direction = DMA_NONE;
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} else {
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videobuf_dma_unmap(vbq->dev, videobuf_to_dma(vb));
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videobuf_dma_free(videobuf_to_dma(vb));
|
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}
|
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|
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vb->state = VIDEOBUF_NEEDS_INIT;
|
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}
|
|
|
|
/*
|
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* Limit the number of available kernel image capture buffers based on the
|
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* number requested, the currently selected image size, and the maximum
|
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* amount of memory permitted for kernel capture buffers.
|
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*/
|
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static int omap24xxcam_vbq_setup(struct videobuf_queue *vbq, unsigned int *cnt,
|
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unsigned int *size)
|
|
{
|
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struct omap24xxcam_fh *fh = vbq->priv_data;
|
|
|
|
if (*cnt <= 0)
|
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*cnt = VIDEO_MAX_FRAME; /* supply a default number of buffers */
|
|
|
|
if (*cnt > VIDEO_MAX_FRAME)
|
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*cnt = VIDEO_MAX_FRAME;
|
|
|
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*size = fh->pix.sizeimage;
|
|
|
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/* accessing fh->cam->capture_mem is ok, it's constant */
|
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if (*size * *cnt > fh->cam->capture_mem)
|
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*cnt = fh->cam->capture_mem / *size;
|
|
|
|
return 0;
|
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}
|
|
|
|
static int omap24xxcam_dma_iolock(struct videobuf_queue *vbq,
|
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struct videobuf_dmabuf *dma)
|
|
{
|
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int err = 0;
|
|
|
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dma->direction = PCI_DMA_FROMDEVICE;
|
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if (!dma_map_sg(vbq->dev, dma->sglist, dma->sglen, dma->direction)) {
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kfree(dma->sglist);
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dma->sglist = NULL;
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dma->sglen = 0;
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err = -EIO;
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}
|
|
|
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return err;
|
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}
|
|
|
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static int omap24xxcam_vbq_prepare(struct videobuf_queue *vbq,
|
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struct videobuf_buffer *vb,
|
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enum v4l2_field field)
|
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{
|
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struct omap24xxcam_fh *fh = vbq->priv_data;
|
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int err = 0;
|
|
|
|
/*
|
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* Accessing pix here is okay since it's constant while
|
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* streaming is on (and we only get called then).
|
|
*/
|
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if (vb->baddr) {
|
|
/* This is a userspace buffer. */
|
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if (fh->pix.sizeimage > vb->bsize) {
|
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/* The buffer isn't big enough. */
|
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err = -EINVAL;
|
|
} else
|
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vb->size = fh->pix.sizeimage;
|
|
} else {
|
|
if (vb->state != VIDEOBUF_NEEDS_INIT) {
|
|
/*
|
|
* We have a kernel bounce buffer that has
|
|
* already been allocated.
|
|
*/
|
|
if (fh->pix.sizeimage > vb->size) {
|
|
/*
|
|
* The image size has been changed to
|
|
* a larger size since this buffer was
|
|
* allocated, so we need to free and
|
|
* reallocate it.
|
|
*/
|
|
omap24xxcam_vbq_release(vbq, vb);
|
|
vb->size = fh->pix.sizeimage;
|
|
}
|
|
} else {
|
|
/* We need to allocate a new kernel bounce buffer. */
|
|
vb->size = fh->pix.sizeimage;
|
|
}
|
|
}
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
vb->width = fh->pix.width;
|
|
vb->height = fh->pix.height;
|
|
vb->field = field;
|
|
|
|
if (vb->state == VIDEOBUF_NEEDS_INIT) {
|
|
if (vb->memory == V4L2_MEMORY_MMAP)
|
|
/*
|
|
* we have built the scatter-gather list by ourself so
|
|
* do the scatter-gather mapping as well
|
|
*/
|
|
err = omap24xxcam_dma_iolock(vbq, videobuf_to_dma(vb));
|
|
else
|
|
err = videobuf_iolock(vbq, vb, NULL);
|
|
}
|
|
|
|
if (!err)
|
|
vb->state = VIDEOBUF_PREPARED;
|
|
else
|
|
omap24xxcam_vbq_release(vbq, vb);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void omap24xxcam_vbq_queue(struct videobuf_queue *vbq,
|
|
struct videobuf_buffer *vb)
|
|
{
|
|
struct omap24xxcam_fh *fh = vbq->priv_data;
|
|
struct omap24xxcam_device *cam = fh->cam;
|
|
enum videobuf_state state = vb->state;
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
/*
|
|
* FIXME: We're marking the buffer active since we have no
|
|
* pretty way of marking it active exactly when the
|
|
* scatter-gather transfer starts.
|
|
*/
|
|
vb->state = VIDEOBUF_ACTIVE;
|
|
|
|
err = omap24xxcam_sgdma_queue(&fh->cam->sgdma,
|
|
videobuf_to_dma(vb)->sglist,
|
|
videobuf_to_dma(vb)->sglen, vb->size,
|
|
omap24xxcam_vbq_complete, vb);
|
|
|
|
if (!err) {
|
|
spin_lock_irqsave(&cam->core_enable_disable_lock, flags);
|
|
if (++cam->sgdma_in_queue == 1
|
|
&& !atomic_read(&cam->in_reset))
|
|
omap24xxcam_core_enable(cam);
|
|
spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
|
|
} else {
|
|
/*
|
|
* Oops. We're not supposed to get any errors here.
|
|
* The only way we could get an error is if we ran out
|
|
* of scatter-gather DMA slots, but we are supposed to
|
|
* have at least as many scatter-gather DMA slots as
|
|
* video buffers so that can't happen.
|
|
*/
|
|
dev_err(cam->dev, "failed to queue a video buffer for dma!\n");
|
|
dev_err(cam->dev, "likely a bug in the driver!\n");
|
|
vb->state = state;
|
|
}
|
|
}
|
|
|
|
static struct videobuf_queue_ops omap24xxcam_vbq_ops = {
|
|
.buf_setup = omap24xxcam_vbq_setup,
|
|
.buf_prepare = omap24xxcam_vbq_prepare,
|
|
.buf_queue = omap24xxcam_vbq_queue,
|
|
.buf_release = omap24xxcam_vbq_release,
|
|
};
|
|
|
|
/*
|
|
*
|
|
* OMAP main camera system
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Reset camera block to power-on state.
|
|
*/
|
|
static void omap24xxcam_poweron_reset(struct omap24xxcam_device *cam)
|
|
{
|
|
int max_loop = RESET_TIMEOUT_NS;
|
|
|
|
/* Reset whole camera subsystem */
|
|
omap24xxcam_reg_out(cam->mmio_base,
|
|
CAM_SYSCONFIG,
|
|
CAM_SYSCONFIG_SOFTRESET);
|
|
|
|
/* Wait till it's finished */
|
|
while (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS)
|
|
& CAM_SYSSTATUS_RESETDONE)
|
|
&& --max_loop) {
|
|
ndelay(1);
|
|
}
|
|
|
|
if (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS)
|
|
& CAM_SYSSTATUS_RESETDONE))
|
|
dev_err(cam->dev, "camera soft reset timeout\n");
|
|
}
|
|
|
|
/*
|
|
* (Re)initialise the camera block.
|
|
*/
|
|
static void omap24xxcam_hwinit(struct omap24xxcam_device *cam)
|
|
{
|
|
omap24xxcam_poweron_reset(cam);
|
|
|
|
/* set the camera subsystem autoidle bit */
|
|
omap24xxcam_reg_out(cam->mmio_base, CAM_SYSCONFIG,
|
|
CAM_SYSCONFIG_AUTOIDLE);
|
|
|
|
/* set the camera MMU autoidle bit */
|
|
omap24xxcam_reg_out(cam->mmio_base,
|
|
CAMMMU_REG_OFFSET + CAMMMU_SYSCONFIG,
|
|
CAMMMU_SYSCONFIG_AUTOIDLE);
|
|
|
|
omap24xxcam_core_hwinit(cam);
|
|
|
|
omap24xxcam_dma_hwinit(&cam->sgdma.dma);
|
|
}
|
|
|
|
/*
|
|
* Callback for dma transfer stalling.
|
|
*/
|
|
static void omap24xxcam_stalled_dma_reset(unsigned long data)
|
|
{
|
|
struct omap24xxcam_device *cam = (struct omap24xxcam_device *)data;
|
|
|
|
if (!atomic_read(&cam->in_reset)) {
|
|
dev_dbg(cam->dev, "dma stalled, resetting camera\n");
|
|
omap24xxcam_reset(cam);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Stop capture. Mark we're doing a reset, stop DMA transfers and
|
|
* core. (No new scatter-gather transfers will be queued whilst
|
|
* in_reset is non-zero.)
|
|
*
|
|
* If omap24xxcam_capture_stop is called from several places at
|
|
* once, only the first call will have an effect. Similarly, the last
|
|
* call omap24xxcam_streaming_cont will have effect.
|
|
*
|
|
* Serialisation is ensured by using cam->core_enable_disable_lock.
|
|
*/
|
|
static void omap24xxcam_capture_stop(struct omap24xxcam_device *cam)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cam->core_enable_disable_lock, flags);
|
|
|
|
if (atomic_inc_return(&cam->in_reset) != 1) {
|
|
spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
|
|
return;
|
|
}
|
|
|
|
omap24xxcam_core_disable(cam);
|
|
|
|
spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
|
|
|
|
omap24xxcam_sgdma_sync(&cam->sgdma);
|
|
}
|
|
|
|
/*
|
|
* Reset and continue streaming.
|
|
*
|
|
* Note: Resetting the camera FIFO via the CC_RST bit in the CC_CTRL
|
|
* register is supposed to be sufficient to recover from a camera
|
|
* interface error, but it doesn't seem to be enough. If we only do
|
|
* that then subsequent image captures are out of sync by either one
|
|
* or two times DMA_THRESHOLD bytes. Resetting and re-initializing the
|
|
* entire camera subsystem prevents the problem with frame
|
|
* synchronization.
|
|
*/
|
|
static void omap24xxcam_capture_cont(struct omap24xxcam_device *cam)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cam->core_enable_disable_lock, flags);
|
|
|
|
if (atomic_read(&cam->in_reset) != 1)
|
|
goto out;
|
|
|
|
omap24xxcam_hwinit(cam);
|
|
|
|
omap24xxcam_sensor_if_enable(cam);
|
|
|
|
omap24xxcam_sgdma_process(&cam->sgdma);
|
|
|
|
if (cam->sgdma_in_queue)
|
|
omap24xxcam_core_enable(cam);
|
|
|
|
out:
|
|
atomic_dec(&cam->in_reset);
|
|
spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags);
|
|
}
|
|
|
|
static ssize_t
|
|
omap24xxcam_streaming_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct omap24xxcam_device *cam = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%s\n", cam->streaming ? "active" : "inactive");
|
|
}
|
|
static DEVICE_ATTR(streaming, S_IRUGO, omap24xxcam_streaming_show, NULL);
|
|
|
|
/*
|
|
* Stop capture and restart it. I.e. reset the camera during use.
|
|
*/
|
|
static void omap24xxcam_reset(struct omap24xxcam_device *cam)
|
|
{
|
|
omap24xxcam_capture_stop(cam);
|
|
omap24xxcam_capture_cont(cam);
|
|
}
|
|
|
|
/*
|
|
* The main interrupt handler.
|
|
*/
|
|
static irqreturn_t omap24xxcam_isr(int irq, void *arg)
|
|
{
|
|
struct omap24xxcam_device *cam = (struct omap24xxcam_device *)arg;
|
|
u32 irqstatus;
|
|
unsigned int irqhandled = 0;
|
|
|
|
irqstatus = omap24xxcam_reg_in(cam->mmio_base, CAM_IRQSTATUS);
|
|
|
|
if (irqstatus &
|
|
(CAM_IRQSTATUS_DMA_IRQ2 | CAM_IRQSTATUS_DMA_IRQ1
|
|
| CAM_IRQSTATUS_DMA_IRQ0)) {
|
|
omap24xxcam_dma_isr(&cam->sgdma.dma);
|
|
irqhandled = 1;
|
|
}
|
|
if (irqstatus & CAM_IRQSTATUS_CC_IRQ) {
|
|
omap24xxcam_core_isr(cam);
|
|
irqhandled = 1;
|
|
}
|
|
if (irqstatus & CAM_IRQSTATUS_MMU_IRQ)
|
|
dev_err(cam->dev, "unhandled camera MMU interrupt!\n");
|
|
|
|
return IRQ_RETVAL(irqhandled);
|
|
}
|
|
|
|
/*
|
|
*
|
|
* Sensor handling.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Enable the external sensor interface. Try to negotiate interface
|
|
* parameters with the sensor and start using the new ones. The calls
|
|
* to sensor_if_enable and sensor_if_disable need not to be balanced.
|
|
*/
|
|
static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam)
|
|
{
|
|
int rval;
|
|
struct v4l2_ifparm p;
|
|
|
|
rval = vidioc_int_g_ifparm(cam->sdev, &p);
|
|
if (rval) {
|
|
dev_err(cam->dev, "vidioc_int_g_ifparm failed with %d\n", rval);
|
|
return rval;
|
|
}
|
|
|
|
cam->if_type = p.if_type;
|
|
|
|
cam->cc_ctrl = CC_CTRL_CC_EN;
|
|
|
|
switch (p.if_type) {
|
|
case V4L2_IF_TYPE_BT656:
|
|
if (p.u.bt656.frame_start_on_rising_vs)
|
|
cam->cc_ctrl |= CC_CTRL_NOBT_SYNCHRO;
|
|
if (p.u.bt656.bt_sync_correct)
|
|
cam->cc_ctrl |= CC_CTRL_BT_CORRECT;
|
|
if (p.u.bt656.swap)
|
|
cam->cc_ctrl |= CC_CTRL_PAR_ORDERCAM;
|
|
if (p.u.bt656.latch_clk_inv)
|
|
cam->cc_ctrl |= CC_CTRL_PAR_CLK_POL;
|
|
if (p.u.bt656.nobt_hs_inv)
|
|
cam->cc_ctrl |= CC_CTRL_NOBT_HS_POL;
|
|
if (p.u.bt656.nobt_vs_inv)
|
|
cam->cc_ctrl |= CC_CTRL_NOBT_VS_POL;
|
|
|
|
switch (p.u.bt656.mode) {
|
|
case V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT:
|
|
cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT8;
|
|
break;
|
|
case V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT:
|
|
cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT10;
|
|
break;
|
|
case V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT:
|
|
cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT12;
|
|
break;
|
|
case V4L2_IF_TYPE_BT656_MODE_BT_8BIT:
|
|
cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT8;
|
|
break;
|
|
case V4L2_IF_TYPE_BT656_MODE_BT_10BIT:
|
|
cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT10;
|
|
break;
|
|
default:
|
|
dev_err(cam->dev,
|
|
"bt656 interface mode %d not supported\n",
|
|
p.u.bt656.mode);
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* The clock rate that the sensor wants has changed.
|
|
* We have to adjust the xclk from OMAP 2 side to
|
|
* match the sensor's wish as closely as possible.
|
|
*/
|
|
if (p.u.bt656.clock_curr != cam->if_u.bt656.xclk) {
|
|
u32 xclk = p.u.bt656.clock_curr;
|
|
u32 divisor;
|
|
|
|
if (xclk == 0)
|
|
return -EINVAL;
|
|
|
|
if (xclk > CAM_MCLK)
|
|
xclk = CAM_MCLK;
|
|
|
|
divisor = CAM_MCLK / xclk;
|
|
if (divisor * xclk < CAM_MCLK)
|
|
divisor++;
|
|
if (CAM_MCLK / divisor < p.u.bt656.clock_min
|
|
&& divisor > 1)
|
|
divisor--;
|
|
if (divisor > 30)
|
|
divisor = 30;
|
|
|
|
xclk = CAM_MCLK / divisor;
|
|
|
|
if (xclk < p.u.bt656.clock_min
|
|
|| xclk > p.u.bt656.clock_max)
|
|
return -EINVAL;
|
|
|
|
cam->if_u.bt656.xclk = xclk;
|
|
}
|
|
omap24xxcam_core_xclk_set(cam, cam->if_u.bt656.xclk);
|
|
break;
|
|
default:
|
|
/* FIXME: how about other interfaces? */
|
|
dev_err(cam->dev, "interface type %d not supported\n",
|
|
p.if_type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void omap24xxcam_sensor_if_disable(const struct omap24xxcam_device *cam)
|
|
{
|
|
switch (cam->if_type) {
|
|
case V4L2_IF_TYPE_BT656:
|
|
omap24xxcam_core_xclk_set(cam, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialise the sensor hardware.
|
|
*/
|
|
static int omap24xxcam_sensor_init(struct omap24xxcam_device *cam)
|
|
{
|
|
int err = 0;
|
|
struct v4l2_int_device *sdev = cam->sdev;
|
|
|
|
omap24xxcam_clock_on(cam);
|
|
err = omap24xxcam_sensor_if_enable(cam);
|
|
if (err) {
|
|
dev_err(cam->dev, "sensor interface could not be enabled at "
|
|
"initialisation, %d\n", err);
|
|
cam->sdev = NULL;
|
|
goto out;
|
|
}
|
|
|
|
/* power up sensor during sensor initialization */
|
|
vidioc_int_s_power(sdev, 1);
|
|
|
|
err = vidioc_int_dev_init(sdev);
|
|
if (err) {
|
|
dev_err(cam->dev, "cannot initialize sensor, error %d\n", err);
|
|
/* Sensor init failed --- it's nonexistent to us! */
|
|
cam->sdev = NULL;
|
|
goto out;
|
|
}
|
|
|
|
dev_info(cam->dev, "sensor is %s\n", sdev->name);
|
|
|
|
out:
|
|
omap24xxcam_sensor_if_disable(cam);
|
|
omap24xxcam_clock_off(cam);
|
|
|
|
vidioc_int_s_power(sdev, 0);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void omap24xxcam_sensor_exit(struct omap24xxcam_device *cam)
|
|
{
|
|
if (cam->sdev)
|
|
vidioc_int_dev_exit(cam->sdev);
|
|
}
|
|
|
|
static void omap24xxcam_sensor_disable(struct omap24xxcam_device *cam)
|
|
{
|
|
omap24xxcam_sensor_if_disable(cam);
|
|
omap24xxcam_clock_off(cam);
|
|
vidioc_int_s_power(cam->sdev, 0);
|
|
}
|
|
|
|
/*
|
|
* Power-up and configure camera sensor. It's ready for capturing now.
|
|
*/
|
|
static int omap24xxcam_sensor_enable(struct omap24xxcam_device *cam)
|
|
{
|
|
int rval;
|
|
|
|
omap24xxcam_clock_on(cam);
|
|
|
|
omap24xxcam_sensor_if_enable(cam);
|
|
|
|
rval = vidioc_int_s_power(cam->sdev, 1);
|
|
if (rval)
|
|
goto out;
|
|
|
|
rval = vidioc_int_init(cam->sdev);
|
|
if (rval)
|
|
goto out;
|
|
|
|
return 0;
|
|
|
|
out:
|
|
omap24xxcam_sensor_disable(cam);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static void omap24xxcam_sensor_reset_work(struct work_struct *work)
|
|
{
|
|
struct omap24xxcam_device *cam =
|
|
container_of(work, struct omap24xxcam_device,
|
|
sensor_reset_work);
|
|
|
|
if (atomic_read(&cam->reset_disable))
|
|
return;
|
|
|
|
omap24xxcam_capture_stop(cam);
|
|
|
|
if (vidioc_int_reset(cam->sdev) == 0) {
|
|
vidioc_int_init(cam->sdev);
|
|
} else {
|
|
/* Can't reset it by vidioc_int_reset. */
|
|
omap24xxcam_sensor_disable(cam);
|
|
omap24xxcam_sensor_enable(cam);
|
|
}
|
|
|
|
omap24xxcam_capture_cont(cam);
|
|
}
|
|
|
|
/*
|
|
*
|
|
* IOCTL interface.
|
|
*
|
|
*/
|
|
|
|
static int vidioc_querycap(struct file *file, void *fh,
|
|
struct v4l2_capability *cap)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
|
|
strlcpy(cap->driver, CAM_NAME, sizeof(cap->driver));
|
|
strlcpy(cap->card, cam->vfd->name, sizeof(cap->card));
|
|
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh,
|
|
struct v4l2_fmtdesc *f)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
rval = vidioc_int_enum_fmt_cap(cam->sdev, f);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_g_fmt_vid_cap(struct file *file, void *fh,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
rval = vidioc_int_g_fmt_cap(cam->sdev, f);
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_s_fmt_vid_cap(struct file *file, void *fh,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (cam->streaming) {
|
|
rval = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
rval = vidioc_int_s_fmt_cap(cam->sdev, f);
|
|
|
|
out:
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
if (!rval) {
|
|
mutex_lock(&ofh->vbq.vb_lock);
|
|
ofh->pix = f->fmt.pix;
|
|
mutex_unlock(&ofh->vbq.vb_lock);
|
|
}
|
|
|
|
memset(f, 0, sizeof(*f));
|
|
vidioc_g_fmt_vid_cap(file, fh, f);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_try_fmt_vid_cap(struct file *file, void *fh,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
rval = vidioc_int_try_fmt_cap(cam->sdev, f);
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_reqbufs(struct file *file, void *fh,
|
|
struct v4l2_requestbuffers *b)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (cam->streaming) {
|
|
mutex_unlock(&cam->mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq);
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
rval = videobuf_reqbufs(&ofh->vbq, b);
|
|
|
|
/*
|
|
* Either videobuf_reqbufs failed or the buffers are not
|
|
* memory-mapped (which would need special attention).
|
|
*/
|
|
if (rval < 0 || b->memory != V4L2_MEMORY_MMAP)
|
|
goto out;
|
|
|
|
rval = omap24xxcam_vbq_alloc_mmap_buffers(&ofh->vbq, rval);
|
|
if (rval)
|
|
omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq);
|
|
|
|
out:
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_querybuf(struct file *file, void *fh,
|
|
struct v4l2_buffer *b)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
|
|
return videobuf_querybuf(&ofh->vbq, b);
|
|
}
|
|
|
|
static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
|
|
return videobuf_qbuf(&ofh->vbq, b);
|
|
}
|
|
|
|
static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
struct videobuf_buffer *vb;
|
|
int rval;
|
|
|
|
videobuf_dqbuf_again:
|
|
rval = videobuf_dqbuf(&ofh->vbq, b, file->f_flags & O_NONBLOCK);
|
|
if (rval)
|
|
goto out;
|
|
|
|
vb = ofh->vbq.bufs[b->index];
|
|
|
|
mutex_lock(&cam->mutex);
|
|
/* _needs_reset returns -EIO if reset is required. */
|
|
rval = vidioc_int_g_needs_reset(cam->sdev, (void *)vb->baddr);
|
|
mutex_unlock(&cam->mutex);
|
|
if (rval == -EIO)
|
|
schedule_work(&cam->sensor_reset_work);
|
|
else
|
|
rval = 0;
|
|
|
|
out:
|
|
/*
|
|
* This is a hack. We don't want to show -EIO to the user
|
|
* space. Requeue the buffer and try again if we're not doing
|
|
* this in non-blocking mode.
|
|
*/
|
|
if (rval == -EIO) {
|
|
videobuf_qbuf(&ofh->vbq, b);
|
|
if (!(file->f_flags & O_NONBLOCK))
|
|
goto videobuf_dqbuf_again;
|
|
/*
|
|
* We don't have a videobuf_buffer now --- maybe next
|
|
* time...
|
|
*/
|
|
rval = -EAGAIN;
|
|
}
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_streamon(struct file *file, void *fh, enum v4l2_buf_type i)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (cam->streaming) {
|
|
rval = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
rval = omap24xxcam_sensor_if_enable(cam);
|
|
if (rval) {
|
|
dev_dbg(cam->dev, "vidioc_int_g_ifparm failed\n");
|
|
goto out;
|
|
}
|
|
|
|
rval = videobuf_streamon(&ofh->vbq);
|
|
if (!rval) {
|
|
cam->streaming = file;
|
|
sysfs_notify(&cam->dev->kobj, NULL, "streaming");
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
struct videobuf_queue *q = &ofh->vbq;
|
|
int rval;
|
|
|
|
atomic_inc(&cam->reset_disable);
|
|
|
|
flush_work_sync(&cam->sensor_reset_work);
|
|
|
|
rval = videobuf_streamoff(q);
|
|
if (!rval) {
|
|
mutex_lock(&cam->mutex);
|
|
cam->streaming = NULL;
|
|
mutex_unlock(&cam->mutex);
|
|
sysfs_notify(&cam->dev->kobj, NULL, "streaming");
|
|
}
|
|
|
|
atomic_dec(&cam->reset_disable);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_enum_input(struct file *file, void *fh,
|
|
struct v4l2_input *inp)
|
|
{
|
|
if (inp->index > 0)
|
|
return -EINVAL;
|
|
|
|
strlcpy(inp->name, "camera", sizeof(inp->name));
|
|
inp->type = V4L2_INPUT_TYPE_CAMERA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_input(struct file *file, void *fh, unsigned int *i)
|
|
{
|
|
*i = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_input(struct file *file, void *fh, unsigned int i)
|
|
{
|
|
if (i > 0)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_queryctrl(struct file *file, void *fh,
|
|
struct v4l2_queryctrl *a)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
rval = vidioc_int_queryctrl(cam->sdev, a);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_g_ctrl(struct file *file, void *fh,
|
|
struct v4l2_control *a)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
rval = vidioc_int_g_ctrl(cam->sdev, a);
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_s_ctrl(struct file *file, void *fh,
|
|
struct v4l2_control *a)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
rval = vidioc_int_s_ctrl(cam->sdev, a);
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_g_parm(struct file *file, void *fh,
|
|
struct v4l2_streamparm *a) {
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
rval = vidioc_int_g_parm(cam->sdev, a);
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int vidioc_s_parm(struct file *file, void *fh,
|
|
struct v4l2_streamparm *a)
|
|
{
|
|
struct omap24xxcam_fh *ofh = fh;
|
|
struct omap24xxcam_device *cam = ofh->cam;
|
|
struct v4l2_streamparm old_streamparm;
|
|
int rval;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (cam->streaming) {
|
|
rval = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
old_streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
rval = vidioc_int_g_parm(cam->sdev, &old_streamparm);
|
|
if (rval)
|
|
goto out;
|
|
|
|
rval = vidioc_int_s_parm(cam->sdev, a);
|
|
if (rval)
|
|
goto out;
|
|
|
|
rval = omap24xxcam_sensor_if_enable(cam);
|
|
/*
|
|
* Revert to old streaming parameters if enabling sensor
|
|
* interface with the new ones failed.
|
|
*/
|
|
if (rval)
|
|
vidioc_int_s_parm(cam->sdev, &old_streamparm);
|
|
|
|
out:
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
return rval;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* File operations.
|
|
*
|
|
*/
|
|
|
|
static unsigned int omap24xxcam_poll(struct file *file,
|
|
struct poll_table_struct *wait)
|
|
{
|
|
struct omap24xxcam_fh *fh = file->private_data;
|
|
struct omap24xxcam_device *cam = fh->cam;
|
|
struct videobuf_buffer *vb;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (cam->streaming != file) {
|
|
mutex_unlock(&cam->mutex);
|
|
return POLLERR;
|
|
}
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
mutex_lock(&fh->vbq.vb_lock);
|
|
if (list_empty(&fh->vbq.stream)) {
|
|
mutex_unlock(&fh->vbq.vb_lock);
|
|
return POLLERR;
|
|
}
|
|
vb = list_entry(fh->vbq.stream.next, struct videobuf_buffer, stream);
|
|
mutex_unlock(&fh->vbq.vb_lock);
|
|
|
|
poll_wait(file, &vb->done, wait);
|
|
|
|
if (vb->state == VIDEOBUF_DONE || vb->state == VIDEOBUF_ERROR)
|
|
return POLLIN | POLLRDNORM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap24xxcam_mmap_buffers(struct file *file,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
struct omap24xxcam_fh *fh = file->private_data;
|
|
struct omap24xxcam_device *cam = fh->cam;
|
|
struct videobuf_queue *vbq = &fh->vbq;
|
|
unsigned int first, last, size, i, j;
|
|
int err = 0;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (cam->streaming) {
|
|
mutex_unlock(&cam->mutex);
|
|
return -EBUSY;
|
|
}
|
|
mutex_unlock(&cam->mutex);
|
|
mutex_lock(&vbq->vb_lock);
|
|
|
|
/* look for first buffer to map */
|
|
for (first = 0; first < VIDEO_MAX_FRAME; first++) {
|
|
if (NULL == vbq->bufs[first])
|
|
continue;
|
|
if (V4L2_MEMORY_MMAP != vbq->bufs[first]->memory)
|
|
continue;
|
|
if (vbq->bufs[first]->boff == (vma->vm_pgoff << PAGE_SHIFT))
|
|
break;
|
|
}
|
|
|
|
/* look for last buffer to map */
|
|
for (size = 0, last = first; last < VIDEO_MAX_FRAME; last++) {
|
|
if (NULL == vbq->bufs[last])
|
|
continue;
|
|
if (V4L2_MEMORY_MMAP != vbq->bufs[last]->memory)
|
|
continue;
|
|
size += vbq->bufs[last]->bsize;
|
|
if (size == (vma->vm_end - vma->vm_start))
|
|
break;
|
|
}
|
|
|
|
size = 0;
|
|
for (i = first; i <= last && i < VIDEO_MAX_FRAME; i++) {
|
|
struct videobuf_dmabuf *dma = videobuf_to_dma(vbq->bufs[i]);
|
|
|
|
for (j = 0; j < dma->sglen; j++) {
|
|
err = remap_pfn_range(
|
|
vma, vma->vm_start + size,
|
|
page_to_pfn(sg_page(&dma->sglist[j])),
|
|
sg_dma_len(&dma->sglist[j]), vma->vm_page_prot);
|
|
if (err)
|
|
goto out;
|
|
size += sg_dma_len(&dma->sglist[j]);
|
|
}
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&vbq->vb_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int omap24xxcam_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct omap24xxcam_fh *fh = file->private_data;
|
|
int rval;
|
|
|
|
/* let the video-buf mapper check arguments and set-up structures */
|
|
rval = videobuf_mmap_mapper(&fh->vbq, vma);
|
|
if (rval)
|
|
return rval;
|
|
|
|
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
|
|
|
|
/* do mapping to our allocated buffers */
|
|
rval = omap24xxcam_mmap_buffers(file, vma);
|
|
/*
|
|
* In case of error, free vma->vm_private_data allocated by
|
|
* videobuf_mmap_mapper.
|
|
*/
|
|
if (rval)
|
|
kfree(vma->vm_private_data);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int omap24xxcam_open(struct file *file)
|
|
{
|
|
struct omap24xxcam_device *cam = omap24xxcam.priv;
|
|
struct omap24xxcam_fh *fh;
|
|
struct v4l2_format format;
|
|
|
|
if (!cam || !cam->vfd)
|
|
return -ENODEV;
|
|
|
|
fh = kzalloc(sizeof(*fh), GFP_KERNEL);
|
|
if (fh == NULL)
|
|
return -ENOMEM;
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (cam->sdev == NULL || !try_module_get(cam->sdev->module)) {
|
|
mutex_unlock(&cam->mutex);
|
|
goto out_try_module_get;
|
|
}
|
|
|
|
if (atomic_inc_return(&cam->users) == 1) {
|
|
omap24xxcam_hwinit(cam);
|
|
if (omap24xxcam_sensor_enable(cam)) {
|
|
mutex_unlock(&cam->mutex);
|
|
goto out_omap24xxcam_sensor_enable;
|
|
}
|
|
}
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
fh->cam = cam;
|
|
mutex_lock(&cam->mutex);
|
|
vidioc_int_g_fmt_cap(cam->sdev, &format);
|
|
mutex_unlock(&cam->mutex);
|
|
/* FIXME: how about fh->pix when there are more users? */
|
|
fh->pix = format.fmt.pix;
|
|
|
|
file->private_data = fh;
|
|
|
|
spin_lock_init(&fh->vbq_lock);
|
|
|
|
videobuf_queue_sg_init(&fh->vbq, &omap24xxcam_vbq_ops, NULL,
|
|
&fh->vbq_lock, V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
|
V4L2_FIELD_NONE,
|
|
sizeof(struct videobuf_buffer), fh, NULL);
|
|
|
|
return 0;
|
|
|
|
out_omap24xxcam_sensor_enable:
|
|
omap24xxcam_poweron_reset(cam);
|
|
module_put(cam->sdev->module);
|
|
|
|
out_try_module_get:
|
|
kfree(fh);
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int omap24xxcam_release(struct file *file)
|
|
{
|
|
struct omap24xxcam_fh *fh = file->private_data;
|
|
struct omap24xxcam_device *cam = fh->cam;
|
|
|
|
atomic_inc(&cam->reset_disable);
|
|
|
|
flush_work_sync(&cam->sensor_reset_work);
|
|
|
|
/* stop streaming capture */
|
|
videobuf_streamoff(&fh->vbq);
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (cam->streaming == file) {
|
|
cam->streaming = NULL;
|
|
mutex_unlock(&cam->mutex);
|
|
sysfs_notify(&cam->dev->kobj, NULL, "streaming");
|
|
} else {
|
|
mutex_unlock(&cam->mutex);
|
|
}
|
|
|
|
atomic_dec(&cam->reset_disable);
|
|
|
|
omap24xxcam_vbq_free_mmap_buffers(&fh->vbq);
|
|
|
|
/*
|
|
* Make sure the reset work we might have scheduled is not
|
|
* pending! It may be run *only* if we have users. (And it may
|
|
* not be scheduled anymore since streaming is already
|
|
* disabled.)
|
|
*/
|
|
flush_work_sync(&cam->sensor_reset_work);
|
|
|
|
mutex_lock(&cam->mutex);
|
|
if (atomic_dec_return(&cam->users) == 0) {
|
|
omap24xxcam_sensor_disable(cam);
|
|
omap24xxcam_poweron_reset(cam);
|
|
}
|
|
mutex_unlock(&cam->mutex);
|
|
|
|
file->private_data = NULL;
|
|
|
|
module_put(cam->sdev->module);
|
|
kfree(fh);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct v4l2_file_operations omap24xxcam_fops = {
|
|
.ioctl = video_ioctl2,
|
|
.poll = omap24xxcam_poll,
|
|
.mmap = omap24xxcam_mmap,
|
|
.open = omap24xxcam_open,
|
|
.release = omap24xxcam_release,
|
|
};
|
|
|
|
/*
|
|
*
|
|
* Power management.
|
|
*
|
|
*/
|
|
|
|
#ifdef CONFIG_PM
|
|
static int omap24xxcam_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct omap24xxcam_device *cam = platform_get_drvdata(pdev);
|
|
|
|
if (atomic_read(&cam->users) == 0)
|
|
return 0;
|
|
|
|
if (!atomic_read(&cam->reset_disable))
|
|
omap24xxcam_capture_stop(cam);
|
|
|
|
omap24xxcam_sensor_disable(cam);
|
|
omap24xxcam_poweron_reset(cam);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap24xxcam_resume(struct platform_device *pdev)
|
|
{
|
|
struct omap24xxcam_device *cam = platform_get_drvdata(pdev);
|
|
|
|
if (atomic_read(&cam->users) == 0)
|
|
return 0;
|
|
|
|
omap24xxcam_hwinit(cam);
|
|
omap24xxcam_sensor_enable(cam);
|
|
|
|
if (!atomic_read(&cam->reset_disable))
|
|
omap24xxcam_capture_cont(cam);
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_PM */
|
|
|
|
static const struct v4l2_ioctl_ops omap24xxcam_ioctl_fops = {
|
|
.vidioc_querycap = vidioc_querycap,
|
|
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
|
|
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
|
|
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
|
|
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
|
|
.vidioc_reqbufs = vidioc_reqbufs,
|
|
.vidioc_querybuf = vidioc_querybuf,
|
|
.vidioc_qbuf = vidioc_qbuf,
|
|
.vidioc_dqbuf = vidioc_dqbuf,
|
|
.vidioc_streamon = vidioc_streamon,
|
|
.vidioc_streamoff = vidioc_streamoff,
|
|
.vidioc_enum_input = vidioc_enum_input,
|
|
.vidioc_g_input = vidioc_g_input,
|
|
.vidioc_s_input = vidioc_s_input,
|
|
.vidioc_queryctrl = vidioc_queryctrl,
|
|
.vidioc_g_ctrl = vidioc_g_ctrl,
|
|
.vidioc_s_ctrl = vidioc_s_ctrl,
|
|
.vidioc_g_parm = vidioc_g_parm,
|
|
.vidioc_s_parm = vidioc_s_parm,
|
|
};
|
|
|
|
/*
|
|
*
|
|
* Camera device (i.e. /dev/video).
|
|
*
|
|
*/
|
|
|
|
static int omap24xxcam_device_register(struct v4l2_int_device *s)
|
|
{
|
|
struct omap24xxcam_device *cam = s->u.slave->master->priv;
|
|
struct video_device *vfd;
|
|
int rval;
|
|
|
|
/* We already have a slave. */
|
|
if (cam->sdev)
|
|
return -EBUSY;
|
|
|
|
cam->sdev = s;
|
|
|
|
if (device_create_file(cam->dev, &dev_attr_streaming) != 0) {
|
|
dev_err(cam->dev, "could not register sysfs entry\n");
|
|
rval = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
/* initialize the video_device struct */
|
|
vfd = cam->vfd = video_device_alloc();
|
|
if (!vfd) {
|
|
dev_err(cam->dev, "could not allocate video device struct\n");
|
|
rval = -ENOMEM;
|
|
goto err;
|
|
}
|
|
vfd->release = video_device_release;
|
|
|
|
vfd->parent = cam->dev;
|
|
|
|
strlcpy(vfd->name, CAM_NAME, sizeof(vfd->name));
|
|
vfd->fops = &omap24xxcam_fops;
|
|
vfd->ioctl_ops = &omap24xxcam_ioctl_fops;
|
|
|
|
omap24xxcam_hwinit(cam);
|
|
|
|
rval = omap24xxcam_sensor_init(cam);
|
|
if (rval)
|
|
goto err;
|
|
|
|
if (video_register_device(vfd, VFL_TYPE_GRABBER, video_nr) < 0) {
|
|
dev_err(cam->dev, "could not register V4L device\n");
|
|
rval = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
omap24xxcam_poweron_reset(cam);
|
|
|
|
dev_info(cam->dev, "registered device %s\n",
|
|
video_device_node_name(vfd));
|
|
|
|
return 0;
|
|
|
|
err:
|
|
omap24xxcam_device_unregister(s);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static void omap24xxcam_device_unregister(struct v4l2_int_device *s)
|
|
{
|
|
struct omap24xxcam_device *cam = s->u.slave->master->priv;
|
|
|
|
omap24xxcam_sensor_exit(cam);
|
|
|
|
if (cam->vfd) {
|
|
if (!video_is_registered(cam->vfd)) {
|
|
/*
|
|
* The device was never registered, so release the
|
|
* video_device struct directly.
|
|
*/
|
|
video_device_release(cam->vfd);
|
|
} else {
|
|
/*
|
|
* The unregister function will release the
|
|
* video_device struct as well as
|
|
* unregistering it.
|
|
*/
|
|
video_unregister_device(cam->vfd);
|
|
}
|
|
cam->vfd = NULL;
|
|
}
|
|
|
|
device_remove_file(cam->dev, &dev_attr_streaming);
|
|
|
|
cam->sdev = NULL;
|
|
}
|
|
|
|
static struct v4l2_int_master omap24xxcam_master = {
|
|
.attach = omap24xxcam_device_register,
|
|
.detach = omap24xxcam_device_unregister,
|
|
};
|
|
|
|
static struct v4l2_int_device omap24xxcam = {
|
|
.module = THIS_MODULE,
|
|
.name = CAM_NAME,
|
|
.type = v4l2_int_type_master,
|
|
.u = {
|
|
.master = &omap24xxcam_master
|
|
},
|
|
};
|
|
|
|
/*
|
|
*
|
|
* Driver initialisation and deinitialisation.
|
|
*
|
|
*/
|
|
|
|
static int __devinit omap24xxcam_probe(struct platform_device *pdev)
|
|
{
|
|
struct omap24xxcam_device *cam;
|
|
struct resource *mem;
|
|
int irq;
|
|
|
|
cam = kzalloc(sizeof(*cam), GFP_KERNEL);
|
|
if (!cam) {
|
|
dev_err(&pdev->dev, "could not allocate memory\n");
|
|
goto err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, cam);
|
|
|
|
cam->dev = &pdev->dev;
|
|
|
|
/*
|
|
* Impose a lower limit on the amount of memory allocated for
|
|
* capture. We require at least enough memory to double-buffer
|
|
* QVGA (300KB).
|
|
*/
|
|
if (capture_mem < 320 * 240 * 2 * 2)
|
|
capture_mem = 320 * 240 * 2 * 2;
|
|
cam->capture_mem = capture_mem;
|
|
|
|
/* request the mem region for the camera registers */
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!mem) {
|
|
dev_err(cam->dev, "no mem resource?\n");
|
|
goto err;
|
|
}
|
|
if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
|
|
dev_err(cam->dev,
|
|
"cannot reserve camera register I/O region\n");
|
|
goto err;
|
|
}
|
|
cam->mmio_base_phys = mem->start;
|
|
cam->mmio_size = resource_size(mem);
|
|
|
|
/* map the region */
|
|
cam->mmio_base = ioremap_nocache(cam->mmio_base_phys, cam->mmio_size);
|
|
if (!cam->mmio_base) {
|
|
dev_err(cam->dev, "cannot map camera register I/O region\n");
|
|
goto err;
|
|
}
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq <= 0) {
|
|
dev_err(cam->dev, "no irq for camera?\n");
|
|
goto err;
|
|
}
|
|
|
|
/* install the interrupt service routine */
|
|
if (request_irq(irq, omap24xxcam_isr, 0, CAM_NAME, cam)) {
|
|
dev_err(cam->dev,
|
|
"could not install interrupt service routine\n");
|
|
goto err;
|
|
}
|
|
cam->irq = irq;
|
|
|
|
if (omap24xxcam_clock_get(cam))
|
|
goto err;
|
|
|
|
INIT_WORK(&cam->sensor_reset_work, omap24xxcam_sensor_reset_work);
|
|
|
|
mutex_init(&cam->mutex);
|
|
spin_lock_init(&cam->core_enable_disable_lock);
|
|
|
|
omap24xxcam_sgdma_init(&cam->sgdma,
|
|
cam->mmio_base + CAMDMA_REG_OFFSET,
|
|
omap24xxcam_stalled_dma_reset,
|
|
(unsigned long)cam);
|
|
|
|
omap24xxcam.priv = cam;
|
|
|
|
if (v4l2_int_device_register(&omap24xxcam))
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
omap24xxcam_remove(pdev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int omap24xxcam_remove(struct platform_device *pdev)
|
|
{
|
|
struct omap24xxcam_device *cam = platform_get_drvdata(pdev);
|
|
|
|
if (!cam)
|
|
return 0;
|
|
|
|
if (omap24xxcam.priv != NULL)
|
|
v4l2_int_device_unregister(&omap24xxcam);
|
|
omap24xxcam.priv = NULL;
|
|
|
|
omap24xxcam_clock_put(cam);
|
|
|
|
if (cam->irq) {
|
|
free_irq(cam->irq, cam);
|
|
cam->irq = 0;
|
|
}
|
|
|
|
if (cam->mmio_base) {
|
|
iounmap((void *)cam->mmio_base);
|
|
cam->mmio_base = 0;
|
|
}
|
|
|
|
if (cam->mmio_base_phys) {
|
|
release_mem_region(cam->mmio_base_phys, cam->mmio_size);
|
|
cam->mmio_base_phys = 0;
|
|
}
|
|
|
|
kfree(cam);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver omap24xxcam_driver = {
|
|
.probe = omap24xxcam_probe,
|
|
.remove = omap24xxcam_remove,
|
|
#ifdef CONFIG_PM
|
|
.suspend = omap24xxcam_suspend,
|
|
.resume = omap24xxcam_resume,
|
|
#endif
|
|
.driver = {
|
|
.name = CAM_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(omap24xxcam_driver);
|
|
|
|
MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>");
|
|
MODULE_DESCRIPTION("OMAP24xx Video for Linux camera driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(OMAP24XXCAM_VERSION);
|
|
module_param(video_nr, int, 0);
|
|
MODULE_PARM_DESC(video_nr,
|
|
"Minor number for video device (-1 ==> auto assign)");
|
|
module_param(capture_mem, int, 0);
|
|
MODULE_PARM_DESC(capture_mem, "Maximum amount of memory for capture "
|
|
"buffers (default 4800kiB)");
|