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1323 lines
34 KiB
1323 lines
34 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Driver for the VIA Chrome integrated camera controller. |
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* |
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* Copyright 2009,2010 Jonathan Corbet <[email protected]> |
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* |
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* This work was supported by the One Laptop Per Child project |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/device.h> |
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#include <linux/list.h> |
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#include <linux/pci.h> |
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#include <linux/gpio.h> |
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#include <linux/interrupt.h> |
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#include <linux/platform_device.h> |
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#include <linux/videodev2.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/v4l2-ctrls.h> |
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#include <media/v4l2-event.h> |
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#include <media/v4l2-image-sizes.h> |
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#include <media/i2c/ov7670.h> |
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#include <media/videobuf2-dma-sg.h> |
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#include <linux/delay.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/pm_qos.h> |
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#include <linux/via-core.h> |
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#include <linux/via-gpio.h> |
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#include <linux/via_i2c.h> |
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#ifdef CONFIG_X86 |
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#include <asm/olpc.h> |
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#else |
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#define machine_is_olpc(x) 0 |
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#endif |
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#include "via-camera.h" |
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MODULE_ALIAS("platform:viafb-camera"); |
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MODULE_AUTHOR("Jonathan Corbet <[email protected]>"); |
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MODULE_DESCRIPTION("VIA framebuffer-based camera controller driver"); |
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MODULE_LICENSE("GPL"); |
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static bool flip_image; |
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module_param(flip_image, bool, 0444); |
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MODULE_PARM_DESC(flip_image, |
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"If set, the sensor will be instructed to flip the image vertically."); |
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static bool override_serial; |
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module_param(override_serial, bool, 0444); |
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MODULE_PARM_DESC(override_serial, |
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"The camera driver will normally refuse to load if the XO 1.5 serial port is enabled. Set this option to force-enable the camera."); |
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/* |
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* The structure describing our camera. |
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*/ |
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enum viacam_opstate { S_IDLE = 0, S_RUNNING = 1 }; |
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struct via_camera { |
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struct v4l2_device v4l2_dev; |
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struct v4l2_ctrl_handler ctrl_handler; |
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struct video_device vdev; |
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struct v4l2_subdev *sensor; |
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struct platform_device *platdev; |
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struct viafb_dev *viadev; |
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struct mutex lock; |
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enum viacam_opstate opstate; |
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unsigned long flags; |
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struct pm_qos_request qos_request; |
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/* |
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* GPIO info for power/reset management |
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*/ |
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int power_gpio; |
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int reset_gpio; |
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/* |
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* I/O memory stuff. |
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*/ |
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void __iomem *mmio; /* Where the registers live */ |
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void __iomem *fbmem; /* Frame buffer memory */ |
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u32 fb_offset; /* Reserved memory offset (FB) */ |
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/* |
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* Capture buffers and related. The controller supports |
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* up to three, so that's what we have here. These buffers |
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* live in frame buffer memory, so we don't call them "DMA". |
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*/ |
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unsigned int cb_offsets[3]; /* offsets into fb mem */ |
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u8 __iomem *cb_addrs[3]; /* Kernel-space addresses */ |
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int n_cap_bufs; /* How many are we using? */ |
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struct vb2_queue vq; |
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struct list_head buffer_queue; |
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u32 sequence; |
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/* |
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* Video format information. sensor_format is kept in a form |
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* that we can use to pass to the sensor. We always run the |
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* sensor in VGA resolution, though, and let the controller |
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* downscale things if need be. So we keep the "real* |
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* dimensions separately. |
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*/ |
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struct v4l2_pix_format sensor_format; |
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struct v4l2_pix_format user_format; |
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u32 mbus_code; |
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}; |
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/* buffer for one video frame */ |
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struct via_buffer { |
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/* common v4l buffer stuff -- must be first */ |
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struct vb2_v4l2_buffer vbuf; |
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struct list_head queue; |
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}; |
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/* |
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* Yes, this is a hack, but there's only going to be one of these |
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* on any system we know of. |
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*/ |
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static struct via_camera *via_cam_info; |
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/* |
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* Flag values, manipulated with bitops |
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*/ |
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#define CF_DMA_ACTIVE 0 /* A frame is incoming */ |
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#define CF_CONFIG_NEEDED 1 /* Must configure hardware */ |
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/* |
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* Nasty ugly v4l2 boilerplate. |
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*/ |
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#define sensor_call(cam, optype, func, args...) \ |
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v4l2_subdev_call(cam->sensor, optype, func, ##args) |
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/* |
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* Debugging and related. |
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*/ |
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#define cam_err(cam, fmt, arg...) \ |
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dev_err(&(cam)->platdev->dev, fmt, ##arg); |
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#define cam_warn(cam, fmt, arg...) \ |
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dev_warn(&(cam)->platdev->dev, fmt, ##arg); |
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#define cam_dbg(cam, fmt, arg...) \ |
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dev_dbg(&(cam)->platdev->dev, fmt, ##arg); |
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/* |
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* Format handling. This is ripped almost directly from Hans's changes |
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* to cafe_ccic.c. It's a little unfortunate; until this change, we |
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* didn't need to know anything about the format except its byte depth; |
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* now this information must be managed at this level too. |
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*/ |
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static struct via_format { |
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__u32 pixelformat; |
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int bpp; /* Bytes per pixel */ |
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u32 mbus_code; |
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} via_formats[] = { |
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{ |
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.pixelformat = V4L2_PIX_FMT_YUYV, |
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.mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, |
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.bpp = 2, |
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}, |
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/* RGB444 and Bayer should be doable, but have never been |
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tested with this driver. RGB565 seems to work at the default |
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resolution, but results in color corruption when being scaled by |
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viacam_set_scaled(), and is disabled as a result. */ |
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}; |
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#define N_VIA_FMTS ARRAY_SIZE(via_formats) |
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static struct via_format *via_find_format(u32 pixelformat) |
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{ |
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unsigned i; |
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for (i = 0; i < N_VIA_FMTS; i++) |
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if (via_formats[i].pixelformat == pixelformat) |
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return via_formats + i; |
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/* Not found? Then return the first format. */ |
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return via_formats; |
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} |
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/*--------------------------------------------------------------------------*/ |
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/* |
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* Sensor power/reset management. This piece is OLPC-specific for |
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* sure; other configurations will have things connected differently. |
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*/ |
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static int via_sensor_power_setup(struct via_camera *cam) |
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{ |
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int ret; |
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cam->power_gpio = viafb_gpio_lookup("VGPIO3"); |
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cam->reset_gpio = viafb_gpio_lookup("VGPIO2"); |
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if (!gpio_is_valid(cam->power_gpio) || !gpio_is_valid(cam->reset_gpio)) { |
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dev_err(&cam->platdev->dev, "Unable to find GPIO lines\n"); |
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return -EINVAL; |
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} |
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ret = gpio_request(cam->power_gpio, "viafb-camera"); |
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if (ret) { |
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dev_err(&cam->platdev->dev, "Unable to request power GPIO\n"); |
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return ret; |
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} |
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ret = gpio_request(cam->reset_gpio, "viafb-camera"); |
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if (ret) { |
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dev_err(&cam->platdev->dev, "Unable to request reset GPIO\n"); |
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gpio_free(cam->power_gpio); |
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return ret; |
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} |
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gpio_direction_output(cam->power_gpio, 0); |
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gpio_direction_output(cam->reset_gpio, 0); |
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return 0; |
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} |
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/* |
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* Power up the sensor and perform the reset dance. |
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*/ |
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static void via_sensor_power_up(struct via_camera *cam) |
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{ |
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gpio_set_value(cam->power_gpio, 1); |
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gpio_set_value(cam->reset_gpio, 0); |
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msleep(20); /* Probably excessive */ |
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gpio_set_value(cam->reset_gpio, 1); |
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msleep(20); |
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} |
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static void via_sensor_power_down(struct via_camera *cam) |
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{ |
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gpio_set_value(cam->power_gpio, 0); |
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gpio_set_value(cam->reset_gpio, 0); |
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} |
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static void via_sensor_power_release(struct via_camera *cam) |
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{ |
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via_sensor_power_down(cam); |
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gpio_free(cam->power_gpio); |
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gpio_free(cam->reset_gpio); |
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} |
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/* --------------------------------------------------------------------------*/ |
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/* Sensor ops */ |
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/* |
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* Manage the ov7670 "flip" bit, which needs special help. |
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*/ |
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static int viacam_set_flip(struct via_camera *cam) |
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{ |
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struct v4l2_control ctrl; |
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memset(&ctrl, 0, sizeof(ctrl)); |
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ctrl.id = V4L2_CID_VFLIP; |
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ctrl.value = flip_image; |
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return v4l2_s_ctrl(NULL, cam->sensor->ctrl_handler, &ctrl); |
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} |
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/* |
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* Configure the sensor. It's up to the caller to ensure |
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* that the camera is in the correct operating state. |
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*/ |
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static int viacam_configure_sensor(struct via_camera *cam) |
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{ |
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struct v4l2_subdev_format format = { |
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.which = V4L2_SUBDEV_FORMAT_ACTIVE, |
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}; |
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int ret; |
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v4l2_fill_mbus_format(&format.format, &cam->sensor_format, cam->mbus_code); |
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ret = sensor_call(cam, core, init, 0); |
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if (ret == 0) |
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ret = sensor_call(cam, pad, set_fmt, NULL, &format); |
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/* |
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* OV7670 does weird things if flip is set *before* format... |
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*/ |
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if (ret == 0) |
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ret = viacam_set_flip(cam); |
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return ret; |
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} |
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/* --------------------------------------------------------------------------*/ |
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/* |
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* Some simple register accessors; they assume that the lock is held. |
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* |
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* Should we want to support the second capture engine, we could |
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* hide the register difference by adding 0x1000 to registers in the |
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* 0x300-350 range. |
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*/ |
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static inline void viacam_write_reg(struct via_camera *cam, |
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int reg, int value) |
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{ |
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iowrite32(value, cam->mmio + reg); |
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} |
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static inline int viacam_read_reg(struct via_camera *cam, int reg) |
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{ |
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return ioread32(cam->mmio + reg); |
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} |
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static inline void viacam_write_reg_mask(struct via_camera *cam, |
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int reg, int value, int mask) |
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{ |
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int tmp = viacam_read_reg(cam, reg); |
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tmp = (tmp & ~mask) | (value & mask); |
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viacam_write_reg(cam, reg, tmp); |
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} |
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/* --------------------------------------------------------------------------*/ |
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/* Interrupt management and handling */ |
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static irqreturn_t viacam_quick_irq(int irq, void *data) |
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{ |
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struct via_camera *cam = data; |
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irqreturn_t ret = IRQ_NONE; |
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int icv; |
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/* |
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* All we do here is to clear the interrupts and tell |
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* the handler thread to wake up. |
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*/ |
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spin_lock(&cam->viadev->reg_lock); |
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icv = viacam_read_reg(cam, VCR_INTCTRL); |
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if (icv & VCR_IC_EAV) { |
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icv |= VCR_IC_EAV|VCR_IC_EVBI|VCR_IC_FFULL; |
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viacam_write_reg(cam, VCR_INTCTRL, icv); |
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ret = IRQ_WAKE_THREAD; |
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} |
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spin_unlock(&cam->viadev->reg_lock); |
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return ret; |
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} |
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/* |
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* Find the next buffer which has somebody waiting on it. |
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*/ |
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static struct via_buffer *viacam_next_buffer(struct via_camera *cam) |
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{ |
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if (cam->opstate != S_RUNNING) |
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return NULL; |
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if (list_empty(&cam->buffer_queue)) |
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return NULL; |
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return list_entry(cam->buffer_queue.next, struct via_buffer, queue); |
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} |
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/* |
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* The threaded IRQ handler. |
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*/ |
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static irqreturn_t viacam_irq(int irq, void *data) |
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{ |
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struct via_camera *cam = data; |
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struct via_buffer *vb; |
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int bufn; |
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struct sg_table *sgt; |
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mutex_lock(&cam->lock); |
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/* |
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* If there is no place to put the data frame, don't bother |
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* with anything else. |
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*/ |
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vb = viacam_next_buffer(cam); |
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if (vb == NULL) |
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goto done; |
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/* |
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* Figure out which buffer we just completed. |
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*/ |
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bufn = (viacam_read_reg(cam, VCR_INTCTRL) & VCR_IC_ACTBUF) >> 3; |
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bufn -= 1; |
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if (bufn < 0) |
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bufn = cam->n_cap_bufs - 1; |
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/* |
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* Copy over the data and let any waiters know. |
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*/ |
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sgt = vb2_dma_sg_plane_desc(&vb->vbuf.vb2_buf, 0); |
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vb->vbuf.vb2_buf.timestamp = ktime_get_ns(); |
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viafb_dma_copy_out_sg(cam->cb_offsets[bufn], sgt->sgl, sgt->nents); |
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vb->vbuf.sequence = cam->sequence++; |
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vb->vbuf.field = V4L2_FIELD_NONE; |
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list_del(&vb->queue); |
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vb2_buffer_done(&vb->vbuf.vb2_buf, VB2_BUF_STATE_DONE); |
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done: |
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mutex_unlock(&cam->lock); |
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return IRQ_HANDLED; |
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} |
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/* |
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* These functions must mess around with the general interrupt |
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* control register, which is relevant to much more than just the |
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* camera. Nothing else uses interrupts, though, as of this writing. |
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* Should that situation change, we'll have to improve support at |
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* the via-core level. |
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*/ |
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static void viacam_int_enable(struct via_camera *cam) |
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{ |
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viacam_write_reg(cam, VCR_INTCTRL, |
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VCR_IC_INTEN|VCR_IC_EAV|VCR_IC_EVBI|VCR_IC_FFULL); |
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viafb_irq_enable(VDE_I_C0AVEN); |
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} |
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static void viacam_int_disable(struct via_camera *cam) |
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{ |
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viafb_irq_disable(VDE_I_C0AVEN); |
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viacam_write_reg(cam, VCR_INTCTRL, 0); |
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} |
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/* --------------------------------------------------------------------------*/ |
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/* Controller operations */ |
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/* |
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* Set up our capture buffers in framebuffer memory. |
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*/ |
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static int viacam_ctlr_cbufs(struct via_camera *cam) |
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{ |
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int nbuf = cam->viadev->camera_fbmem_size/cam->sensor_format.sizeimage; |
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int i; |
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unsigned int offset; |
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/* |
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* See how many buffers we can work with. |
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*/ |
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if (nbuf >= 3) { |
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cam->n_cap_bufs = 3; |
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viacam_write_reg_mask(cam, VCR_CAPINTC, VCR_CI_3BUFS, |
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VCR_CI_3BUFS); |
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} else if (nbuf == 2) { |
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cam->n_cap_bufs = 2; |
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viacam_write_reg_mask(cam, VCR_CAPINTC, 0, VCR_CI_3BUFS); |
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} else { |
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cam_warn(cam, "Insufficient frame buffer memory\n"); |
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return -ENOMEM; |
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} |
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/* |
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* Set them up. |
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*/ |
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offset = cam->fb_offset; |
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for (i = 0; i < cam->n_cap_bufs; i++) { |
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cam->cb_offsets[i] = offset; |
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cam->cb_addrs[i] = cam->fbmem + offset; |
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viacam_write_reg(cam, VCR_VBUF1 + i*4, offset & VCR_VBUF_MASK); |
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offset += cam->sensor_format.sizeimage; |
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} |
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return 0; |
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} |
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/* |
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* Set the scaling register for downscaling the image. |
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* |
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* This register works like this... Vertical scaling is enabled |
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* by bit 26; if that bit is set, downscaling is controlled by the |
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* value in bits 16:25. Those bits are divided by 1024 to get |
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* the scaling factor; setting just bit 25 thus cuts the height |
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* in half. |
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* |
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* Horizontal scaling works about the same, but it's enabled by |
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* bit 11, with bits 0:10 giving the numerator of a fraction |
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* (over 2048) for the scaling value. |
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* |
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* This function is naive in that, if the user departs from |
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* the 3x4 VGA scaling factor, the image will distort. We |
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* could work around that if it really seemed important. |
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*/ |
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static void viacam_set_scale(struct via_camera *cam) |
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{ |
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unsigned int avscale; |
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int sf; |
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if (cam->user_format.width == VGA_WIDTH) |
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avscale = 0; |
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else { |
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sf = (cam->user_format.width*2048)/VGA_WIDTH; |
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avscale = VCR_AVS_HEN | sf; |
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} |
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if (cam->user_format.height < VGA_HEIGHT) { |
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sf = (1024*cam->user_format.height)/VGA_HEIGHT; |
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avscale |= VCR_AVS_VEN | (sf << 16); |
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} |
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viacam_write_reg(cam, VCR_AVSCALE, avscale); |
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} |
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/* |
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* Configure image-related information into the capture engine. |
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*/ |
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static void viacam_ctlr_image(struct via_camera *cam) |
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{ |
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int cicreg; |
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|
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/* |
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* Disable clock before messing with stuff - from the via |
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* sample driver. |
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*/ |
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viacam_write_reg(cam, VCR_CAPINTC, ~(VCR_CI_ENABLE|VCR_CI_CLKEN)); |
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/* |
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* Set up the controller for VGA resolution, modulo magic |
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* offsets from the via sample driver. |
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*/ |
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viacam_write_reg(cam, VCR_HORRANGE, 0x06200120); |
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viacam_write_reg(cam, VCR_VERTRANGE, 0x01de0000); |
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viacam_set_scale(cam); |
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/* |
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* Image size info. |
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*/ |
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viacam_write_reg(cam, VCR_MAXDATA, |
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(cam->sensor_format.height << 16) | |
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(cam->sensor_format.bytesperline >> 3)); |
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viacam_write_reg(cam, VCR_MAXVBI, 0); |
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viacam_write_reg(cam, VCR_VSTRIDE, |
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cam->user_format.bytesperline & VCR_VS_STRIDE); |
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/* |
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* Set up the capture interface control register, |
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* everything but the "go" bit. |
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* |
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* The FIFO threshold is a bit of a magic number; 8 is what |
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* VIA's sample code uses. |
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*/ |
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cicreg = VCR_CI_CLKEN | |
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0x08000000 | /* FIFO threshold */ |
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VCR_CI_FLDINV | /* OLPC-specific? */ |
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VCR_CI_VREFINV | /* OLPC-specific? */ |
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VCR_CI_DIBOTH | /* Capture both fields */ |
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VCR_CI_CCIR601_8; |
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if (cam->n_cap_bufs == 3) |
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cicreg |= VCR_CI_3BUFS; |
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/* |
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* YUV formats need different byte swapping than RGB. |
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*/ |
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if (cam->user_format.pixelformat == V4L2_PIX_FMT_YUYV) |
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cicreg |= VCR_CI_YUYV; |
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else |
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cicreg |= VCR_CI_UYVY; |
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viacam_write_reg(cam, VCR_CAPINTC, cicreg); |
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} |
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|
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static int viacam_config_controller(struct via_camera *cam) |
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{ |
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int ret; |
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unsigned long flags; |
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|
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spin_lock_irqsave(&cam->viadev->reg_lock, flags); |
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ret = viacam_ctlr_cbufs(cam); |
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if (!ret) |
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viacam_ctlr_image(cam); |
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spin_unlock_irqrestore(&cam->viadev->reg_lock, flags); |
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clear_bit(CF_CONFIG_NEEDED, &cam->flags); |
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return ret; |
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} |
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|
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/* |
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* Make it start grabbing data. |
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*/ |
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static void viacam_start_engine(struct via_camera *cam) |
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{ |
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spin_lock_irq(&cam->viadev->reg_lock); |
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viacam_write_reg_mask(cam, VCR_CAPINTC, VCR_CI_ENABLE, VCR_CI_ENABLE); |
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viacam_int_enable(cam); |
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(void) viacam_read_reg(cam, VCR_CAPINTC); /* Force post */ |
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cam->opstate = S_RUNNING; |
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spin_unlock_irq(&cam->viadev->reg_lock); |
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} |
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|
|
|
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static void viacam_stop_engine(struct via_camera *cam) |
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{ |
|
spin_lock_irq(&cam->viadev->reg_lock); |
|
viacam_int_disable(cam); |
|
viacam_write_reg_mask(cam, VCR_CAPINTC, 0, VCR_CI_ENABLE); |
|
(void) viacam_read_reg(cam, VCR_CAPINTC); /* Force post */ |
|
cam->opstate = S_IDLE; |
|
spin_unlock_irq(&cam->viadev->reg_lock); |
|
} |
|
|
|
|
|
/* --------------------------------------------------------------------------*/ |
|
/* vb2 callback ops */ |
|
|
|
static struct via_buffer *vb2_to_via_buffer(struct vb2_buffer *vb) |
|
{ |
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
|
|
|
return container_of(vbuf, struct via_buffer, vbuf); |
|
} |
|
|
|
static void viacam_vb2_queue(struct vb2_buffer *vb) |
|
{ |
|
struct via_camera *cam = vb2_get_drv_priv(vb->vb2_queue); |
|
struct via_buffer *via = vb2_to_via_buffer(vb); |
|
|
|
list_add_tail(&via->queue, &cam->buffer_queue); |
|
} |
|
|
|
static int viacam_vb2_prepare(struct vb2_buffer *vb) |
|
{ |
|
struct via_camera *cam = vb2_get_drv_priv(vb->vb2_queue); |
|
|
|
if (vb2_plane_size(vb, 0) < cam->user_format.sizeimage) { |
|
cam_dbg(cam, |
|
"Plane size too small (%lu < %u)\n", |
|
vb2_plane_size(vb, 0), |
|
cam->user_format.sizeimage); |
|
return -EINVAL; |
|
} |
|
|
|
vb2_set_plane_payload(vb, 0, cam->user_format.sizeimage); |
|
|
|
return 0; |
|
} |
|
|
|
static int viacam_vb2_queue_setup(struct vb2_queue *vq, |
|
unsigned int *nbufs, |
|
unsigned int *num_planes, unsigned int sizes[], |
|
struct device *alloc_devs[]) |
|
{ |
|
struct via_camera *cam = vb2_get_drv_priv(vq); |
|
int size = cam->user_format.sizeimage; |
|
|
|
if (*num_planes) |
|
return sizes[0] < size ? -EINVAL : 0; |
|
|
|
*num_planes = 1; |
|
sizes[0] = size; |
|
return 0; |
|
} |
|
|
|
static int viacam_vb2_start_streaming(struct vb2_queue *vq, unsigned int count) |
|
{ |
|
struct via_camera *cam = vb2_get_drv_priv(vq); |
|
struct via_buffer *buf, *tmp; |
|
int ret = 0; |
|
|
|
if (cam->opstate != S_IDLE) { |
|
ret = -EBUSY; |
|
goto out; |
|
} |
|
/* |
|
* Configure things if need be. |
|
*/ |
|
if (test_bit(CF_CONFIG_NEEDED, &cam->flags)) { |
|
ret = viacam_configure_sensor(cam); |
|
if (ret) |
|
goto out; |
|
ret = viacam_config_controller(cam); |
|
if (ret) |
|
goto out; |
|
} |
|
cam->sequence = 0; |
|
/* |
|
* If the CPU goes into C3, the DMA transfer gets corrupted and |
|
* users start filing unsightly bug reports. Put in a "latency" |
|
* requirement which will keep the CPU out of the deeper sleep |
|
* states. |
|
*/ |
|
cpu_latency_qos_add_request(&cam->qos_request, 50); |
|
viacam_start_engine(cam); |
|
return 0; |
|
out: |
|
list_for_each_entry_safe(buf, tmp, &cam->buffer_queue, queue) { |
|
list_del(&buf->queue); |
|
vb2_buffer_done(&buf->vbuf.vb2_buf, VB2_BUF_STATE_QUEUED); |
|
} |
|
return ret; |
|
} |
|
|
|
static void viacam_vb2_stop_streaming(struct vb2_queue *vq) |
|
{ |
|
struct via_camera *cam = vb2_get_drv_priv(vq); |
|
struct via_buffer *buf, *tmp; |
|
|
|
cpu_latency_qos_remove_request(&cam->qos_request); |
|
viacam_stop_engine(cam); |
|
|
|
list_for_each_entry_safe(buf, tmp, &cam->buffer_queue, queue) { |
|
list_del(&buf->queue); |
|
vb2_buffer_done(&buf->vbuf.vb2_buf, VB2_BUF_STATE_ERROR); |
|
} |
|
} |
|
|
|
static const struct vb2_ops viacam_vb2_ops = { |
|
.queue_setup = viacam_vb2_queue_setup, |
|
.buf_queue = viacam_vb2_queue, |
|
.buf_prepare = viacam_vb2_prepare, |
|
.start_streaming = viacam_vb2_start_streaming, |
|
.stop_streaming = viacam_vb2_stop_streaming, |
|
.wait_prepare = vb2_ops_wait_prepare, |
|
.wait_finish = vb2_ops_wait_finish, |
|
}; |
|
|
|
/* --------------------------------------------------------------------------*/ |
|
/* File operations */ |
|
|
|
static int viacam_open(struct file *filp) |
|
{ |
|
struct via_camera *cam = video_drvdata(filp); |
|
int ret; |
|
|
|
/* |
|
* Note the new user. If this is the first one, we'll also |
|
* need to power up the sensor. |
|
*/ |
|
mutex_lock(&cam->lock); |
|
ret = v4l2_fh_open(filp); |
|
if (ret) |
|
goto out; |
|
if (v4l2_fh_is_singular_file(filp)) { |
|
ret = viafb_request_dma(); |
|
|
|
if (ret) { |
|
v4l2_fh_release(filp); |
|
goto out; |
|
} |
|
via_sensor_power_up(cam); |
|
set_bit(CF_CONFIG_NEEDED, &cam->flags); |
|
} |
|
out: |
|
mutex_unlock(&cam->lock); |
|
return ret; |
|
} |
|
|
|
static int viacam_release(struct file *filp) |
|
{ |
|
struct via_camera *cam = video_drvdata(filp); |
|
bool last_open; |
|
|
|
mutex_lock(&cam->lock); |
|
last_open = v4l2_fh_is_singular_file(filp); |
|
_vb2_fop_release(filp, NULL); |
|
/* |
|
* Last one out needs to turn out the lights. |
|
*/ |
|
if (last_open) { |
|
via_sensor_power_down(cam); |
|
viafb_release_dma(); |
|
} |
|
mutex_unlock(&cam->lock); |
|
return 0; |
|
} |
|
|
|
static const struct v4l2_file_operations viacam_fops = { |
|
.owner = THIS_MODULE, |
|
.open = viacam_open, |
|
.release = viacam_release, |
|
.read = vb2_fop_read, |
|
.poll = vb2_fop_poll, |
|
.mmap = vb2_fop_mmap, |
|
.unlocked_ioctl = video_ioctl2, |
|
}; |
|
|
|
/*----------------------------------------------------------------------------*/ |
|
/* |
|
* The long list of v4l2 ioctl ops |
|
*/ |
|
|
|
/* |
|
* Only one input. |
|
*/ |
|
static int viacam_enum_input(struct file *filp, void *priv, |
|
struct v4l2_input *input) |
|
{ |
|
if (input->index != 0) |
|
return -EINVAL; |
|
|
|
input->type = V4L2_INPUT_TYPE_CAMERA; |
|
strscpy(input->name, "Camera", sizeof(input->name)); |
|
return 0; |
|
} |
|
|
|
static int viacam_g_input(struct file *filp, void *priv, unsigned int *i) |
|
{ |
|
*i = 0; |
|
return 0; |
|
} |
|
|
|
static int viacam_s_input(struct file *filp, void *priv, unsigned int i) |
|
{ |
|
if (i != 0) |
|
return -EINVAL; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Video format stuff. Here is our default format until |
|
* user space messes with things. |
|
*/ |
|
static const struct v4l2_pix_format viacam_def_pix_format = { |
|
.width = VGA_WIDTH, |
|
.height = VGA_HEIGHT, |
|
.pixelformat = V4L2_PIX_FMT_YUYV, |
|
.field = V4L2_FIELD_NONE, |
|
.bytesperline = VGA_WIDTH * 2, |
|
.sizeimage = VGA_WIDTH * VGA_HEIGHT * 2, |
|
.colorspace = V4L2_COLORSPACE_SRGB, |
|
}; |
|
|
|
static const u32 via_def_mbus_code = MEDIA_BUS_FMT_YUYV8_2X8; |
|
|
|
static int viacam_enum_fmt_vid_cap(struct file *filp, void *priv, |
|
struct v4l2_fmtdesc *fmt) |
|
{ |
|
if (fmt->index >= N_VIA_FMTS) |
|
return -EINVAL; |
|
fmt->pixelformat = via_formats[fmt->index].pixelformat; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Figure out proper image dimensions, but always force the |
|
* sensor to VGA. |
|
*/ |
|
static void viacam_fmt_pre(struct v4l2_pix_format *userfmt, |
|
struct v4l2_pix_format *sensorfmt) |
|
{ |
|
*sensorfmt = *userfmt; |
|
if (userfmt->width < QCIF_WIDTH || userfmt->height < QCIF_HEIGHT) { |
|
userfmt->width = QCIF_WIDTH; |
|
userfmt->height = QCIF_HEIGHT; |
|
} |
|
if (userfmt->width > VGA_WIDTH || userfmt->height > VGA_HEIGHT) { |
|
userfmt->width = VGA_WIDTH; |
|
userfmt->height = VGA_HEIGHT; |
|
} |
|
sensorfmt->width = VGA_WIDTH; |
|
sensorfmt->height = VGA_HEIGHT; |
|
} |
|
|
|
static void viacam_fmt_post(struct v4l2_pix_format *userfmt, |
|
struct v4l2_pix_format *sensorfmt) |
|
{ |
|
struct via_format *f = via_find_format(userfmt->pixelformat); |
|
|
|
sensorfmt->bytesperline = sensorfmt->width * f->bpp; |
|
sensorfmt->sizeimage = sensorfmt->height * sensorfmt->bytesperline; |
|
userfmt->pixelformat = sensorfmt->pixelformat; |
|
userfmt->field = sensorfmt->field; |
|
userfmt->bytesperline = 2 * userfmt->width; |
|
userfmt->sizeimage = userfmt->bytesperline * userfmt->height; |
|
userfmt->colorspace = sensorfmt->colorspace; |
|
userfmt->ycbcr_enc = sensorfmt->ycbcr_enc; |
|
userfmt->quantization = sensorfmt->quantization; |
|
userfmt->xfer_func = sensorfmt->xfer_func; |
|
} |
|
|
|
|
|
/* |
|
* The real work of figuring out a workable format. |
|
*/ |
|
static int viacam_do_try_fmt(struct via_camera *cam, |
|
struct v4l2_pix_format *upix, struct v4l2_pix_format *spix) |
|
{ |
|
int ret; |
|
struct v4l2_subdev_pad_config pad_cfg; |
|
struct v4l2_subdev_state pad_state = { |
|
.pads = &pad_cfg |
|
}; |
|
struct v4l2_subdev_format format = { |
|
.which = V4L2_SUBDEV_FORMAT_TRY, |
|
}; |
|
struct via_format *f = via_find_format(upix->pixelformat); |
|
|
|
upix->pixelformat = f->pixelformat; |
|
viacam_fmt_pre(upix, spix); |
|
v4l2_fill_mbus_format(&format.format, spix, f->mbus_code); |
|
ret = sensor_call(cam, pad, set_fmt, &pad_state, &format); |
|
v4l2_fill_pix_format(spix, &format.format); |
|
viacam_fmt_post(upix, spix); |
|
return ret; |
|
} |
|
|
|
|
|
|
|
static int viacam_try_fmt_vid_cap(struct file *filp, void *priv, |
|
struct v4l2_format *fmt) |
|
{ |
|
struct via_camera *cam = video_drvdata(filp); |
|
struct v4l2_format sfmt; |
|
|
|
return viacam_do_try_fmt(cam, &fmt->fmt.pix, &sfmt.fmt.pix); |
|
} |
|
|
|
|
|
static int viacam_g_fmt_vid_cap(struct file *filp, void *priv, |
|
struct v4l2_format *fmt) |
|
{ |
|
struct via_camera *cam = video_drvdata(filp); |
|
|
|
fmt->fmt.pix = cam->user_format; |
|
return 0; |
|
} |
|
|
|
static int viacam_s_fmt_vid_cap(struct file *filp, void *priv, |
|
struct v4l2_format *fmt) |
|
{ |
|
struct via_camera *cam = video_drvdata(filp); |
|
int ret; |
|
struct v4l2_format sfmt; |
|
struct via_format *f = via_find_format(fmt->fmt.pix.pixelformat); |
|
|
|
/* |
|
* Camera must be idle or we can't mess with the |
|
* video setup. |
|
*/ |
|
if (cam->opstate != S_IDLE) |
|
return -EBUSY; |
|
/* |
|
* Let the sensor code look over and tweak the |
|
* requested formatting. |
|
*/ |
|
ret = viacam_do_try_fmt(cam, &fmt->fmt.pix, &sfmt.fmt.pix); |
|
if (ret) |
|
return ret; |
|
/* |
|
* OK, let's commit to the new format. |
|
*/ |
|
cam->user_format = fmt->fmt.pix; |
|
cam->sensor_format = sfmt.fmt.pix; |
|
cam->mbus_code = f->mbus_code; |
|
ret = viacam_configure_sensor(cam); |
|
if (!ret) |
|
ret = viacam_config_controller(cam); |
|
return ret; |
|
} |
|
|
|
static int viacam_querycap(struct file *filp, void *priv, |
|
struct v4l2_capability *cap) |
|
{ |
|
strscpy(cap->driver, "via-camera", sizeof(cap->driver)); |
|
strscpy(cap->card, "via-camera", sizeof(cap->card)); |
|
strscpy(cap->bus_info, "platform:via-camera", sizeof(cap->bus_info)); |
|
return 0; |
|
} |
|
|
|
/* G/S_PARM */ |
|
|
|
static int viacam_g_parm(struct file *filp, void *priv, |
|
struct v4l2_streamparm *parm) |
|
{ |
|
struct via_camera *cam = video_drvdata(filp); |
|
|
|
return v4l2_g_parm_cap(video_devdata(filp), cam->sensor, parm); |
|
} |
|
|
|
static int viacam_s_parm(struct file *filp, void *priv, |
|
struct v4l2_streamparm *parm) |
|
{ |
|
struct via_camera *cam = video_drvdata(filp); |
|
|
|
return v4l2_s_parm_cap(video_devdata(filp), cam->sensor, parm); |
|
} |
|
|
|
static int viacam_enum_framesizes(struct file *filp, void *priv, |
|
struct v4l2_frmsizeenum *sizes) |
|
{ |
|
unsigned int i; |
|
|
|
if (sizes->index != 0) |
|
return -EINVAL; |
|
for (i = 0; i < N_VIA_FMTS; i++) |
|
if (sizes->pixel_format == via_formats[i].pixelformat) |
|
break; |
|
if (i >= N_VIA_FMTS) |
|
return -EINVAL; |
|
sizes->type = V4L2_FRMSIZE_TYPE_CONTINUOUS; |
|
sizes->stepwise.min_width = QCIF_WIDTH; |
|
sizes->stepwise.min_height = QCIF_HEIGHT; |
|
sizes->stepwise.max_width = VGA_WIDTH; |
|
sizes->stepwise.max_height = VGA_HEIGHT; |
|
sizes->stepwise.step_width = sizes->stepwise.step_height = 1; |
|
return 0; |
|
} |
|
|
|
static int viacam_enum_frameintervals(struct file *filp, void *priv, |
|
struct v4l2_frmivalenum *interval) |
|
{ |
|
struct via_camera *cam = video_drvdata(filp); |
|
struct v4l2_subdev_frame_interval_enum fie = { |
|
.index = interval->index, |
|
.code = cam->mbus_code, |
|
.width = cam->sensor_format.width, |
|
.height = cam->sensor_format.height, |
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE, |
|
}; |
|
unsigned int i; |
|
int ret; |
|
|
|
for (i = 0; i < N_VIA_FMTS; i++) |
|
if (interval->pixel_format == via_formats[i].pixelformat) |
|
break; |
|
if (i >= N_VIA_FMTS) |
|
return -EINVAL; |
|
if (interval->width < QCIF_WIDTH || interval->width > VGA_WIDTH || |
|
interval->height < QCIF_HEIGHT || interval->height > VGA_HEIGHT) |
|
return -EINVAL; |
|
ret = sensor_call(cam, pad, enum_frame_interval, NULL, &fie); |
|
if (ret) |
|
return ret; |
|
interval->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
|
interval->discrete = fie.interval; |
|
return 0; |
|
} |
|
|
|
static const struct v4l2_ioctl_ops viacam_ioctl_ops = { |
|
.vidioc_enum_input = viacam_enum_input, |
|
.vidioc_g_input = viacam_g_input, |
|
.vidioc_s_input = viacam_s_input, |
|
.vidioc_enum_fmt_vid_cap = viacam_enum_fmt_vid_cap, |
|
.vidioc_try_fmt_vid_cap = viacam_try_fmt_vid_cap, |
|
.vidioc_g_fmt_vid_cap = viacam_g_fmt_vid_cap, |
|
.vidioc_s_fmt_vid_cap = viacam_s_fmt_vid_cap, |
|
.vidioc_querycap = viacam_querycap, |
|
.vidioc_reqbufs = vb2_ioctl_reqbufs, |
|
.vidioc_create_bufs = vb2_ioctl_create_bufs, |
|
.vidioc_querybuf = vb2_ioctl_querybuf, |
|
.vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
|
.vidioc_qbuf = vb2_ioctl_qbuf, |
|
.vidioc_dqbuf = vb2_ioctl_dqbuf, |
|
.vidioc_expbuf = vb2_ioctl_expbuf, |
|
.vidioc_streamon = vb2_ioctl_streamon, |
|
.vidioc_streamoff = vb2_ioctl_streamoff, |
|
.vidioc_g_parm = viacam_g_parm, |
|
.vidioc_s_parm = viacam_s_parm, |
|
.vidioc_enum_framesizes = viacam_enum_framesizes, |
|
.vidioc_enum_frameintervals = viacam_enum_frameintervals, |
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
|
}; |
|
|
|
/*----------------------------------------------------------------------------*/ |
|
|
|
/* |
|
* Power management. |
|
*/ |
|
#ifdef CONFIG_PM |
|
|
|
static int viacam_suspend(void *priv) |
|
{ |
|
struct via_camera *cam = priv; |
|
enum viacam_opstate state = cam->opstate; |
|
|
|
if (cam->opstate != S_IDLE) { |
|
viacam_stop_engine(cam); |
|
cam->opstate = state; /* So resume restarts */ |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int viacam_resume(void *priv) |
|
{ |
|
struct via_camera *cam = priv; |
|
int ret = 0; |
|
|
|
/* |
|
* Get back to a reasonable operating state. |
|
*/ |
|
via_write_reg_mask(VIASR, 0x78, 0, 0x80); |
|
via_write_reg_mask(VIASR, 0x1e, 0xc0, 0xc0); |
|
viacam_int_disable(cam); |
|
set_bit(CF_CONFIG_NEEDED, &cam->flags); |
|
/* |
|
* Make sure the sensor's power state is correct |
|
*/ |
|
if (!list_empty(&cam->vdev.fh_list)) |
|
via_sensor_power_up(cam); |
|
else |
|
via_sensor_power_down(cam); |
|
/* |
|
* If it was operating, try to restart it. |
|
*/ |
|
if (cam->opstate != S_IDLE) { |
|
mutex_lock(&cam->lock); |
|
ret = viacam_configure_sensor(cam); |
|
if (!ret) |
|
ret = viacam_config_controller(cam); |
|
mutex_unlock(&cam->lock); |
|
if (!ret) |
|
viacam_start_engine(cam); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static struct viafb_pm_hooks viacam_pm_hooks = { |
|
.suspend = viacam_suspend, |
|
.resume = viacam_resume |
|
}; |
|
|
|
#endif /* CONFIG_PM */ |
|
|
|
/* |
|
* Setup stuff. |
|
*/ |
|
|
|
static const struct video_device viacam_v4l_template = { |
|
.name = "via-camera", |
|
.minor = -1, |
|
.fops = &viacam_fops, |
|
.ioctl_ops = &viacam_ioctl_ops, |
|
.release = video_device_release_empty, /* Check this */ |
|
.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | |
|
V4L2_CAP_STREAMING, |
|
}; |
|
|
|
/* |
|
* The OLPC folks put the serial port on the same pin as |
|
* the camera. They also get grumpy if we break the |
|
* serial port and keep them from using it. So we have |
|
* to check the serial enable bit and not step on it. |
|
*/ |
|
#define VIACAM_SERIAL_DEVFN 0x88 |
|
#define VIACAM_SERIAL_CREG 0x46 |
|
#define VIACAM_SERIAL_BIT 0x40 |
|
|
|
static bool viacam_serial_is_enabled(void) |
|
{ |
|
struct pci_bus *pbus = pci_find_bus(0, 0); |
|
u8 cbyte; |
|
|
|
if (!pbus) |
|
return false; |
|
pci_bus_read_config_byte(pbus, VIACAM_SERIAL_DEVFN, |
|
VIACAM_SERIAL_CREG, &cbyte); |
|
if ((cbyte & VIACAM_SERIAL_BIT) == 0) |
|
return false; /* Not enabled */ |
|
if (!override_serial) { |
|
printk(KERN_NOTICE "Via camera: serial port is enabled, " \ |
|
"refusing to load.\n"); |
|
printk(KERN_NOTICE "Specify override_serial=1 to force " \ |
|
"module loading.\n"); |
|
return true; |
|
} |
|
printk(KERN_NOTICE "Via camera: overriding serial port\n"); |
|
pci_bus_write_config_byte(pbus, VIACAM_SERIAL_DEVFN, |
|
VIACAM_SERIAL_CREG, cbyte & ~VIACAM_SERIAL_BIT); |
|
return false; |
|
} |
|
|
|
static struct ov7670_config sensor_cfg = { |
|
/* The XO-1.5 (only known user) clocks the camera at 90MHz. */ |
|
.clock_speed = 90, |
|
}; |
|
|
|
static int viacam_probe(struct platform_device *pdev) |
|
{ |
|
int ret; |
|
struct i2c_adapter *sensor_adapter; |
|
struct viafb_dev *viadev = pdev->dev.platform_data; |
|
struct vb2_queue *vq; |
|
struct i2c_board_info ov7670_info = { |
|
.type = "ov7670", |
|
.addr = 0x42 >> 1, |
|
.platform_data = &sensor_cfg, |
|
}; |
|
|
|
/* |
|
* Note that there are actually two capture channels on |
|
* the device. We only deal with one for now. That |
|
* is encoded here; nothing else assumes it's dealing with |
|
* a unique capture device. |
|
*/ |
|
struct via_camera *cam; |
|
|
|
/* |
|
* Ensure that frame buffer memory has been set aside for |
|
* this purpose. As an arbitrary limit, refuse to work |
|
* with less than two frames of VGA 16-bit data. |
|
* |
|
* If we ever support the second port, we'll need to set |
|
* aside more memory. |
|
*/ |
|
if (viadev->camera_fbmem_size < (VGA_HEIGHT*VGA_WIDTH*4)) { |
|
printk(KERN_ERR "viacam: insufficient FB memory reserved\n"); |
|
return -ENOMEM; |
|
} |
|
if (viadev->engine_mmio == NULL) { |
|
printk(KERN_ERR "viacam: No I/O memory, so no pictures\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
if (machine_is_olpc() && viacam_serial_is_enabled()) |
|
return -EBUSY; |
|
|
|
/* |
|
* Basic structure initialization. |
|
*/ |
|
cam = kzalloc (sizeof(struct via_camera), GFP_KERNEL); |
|
if (cam == NULL) |
|
return -ENOMEM; |
|
via_cam_info = cam; |
|
cam->platdev = pdev; |
|
cam->viadev = viadev; |
|
cam->opstate = S_IDLE; |
|
cam->user_format = cam->sensor_format = viacam_def_pix_format; |
|
mutex_init(&cam->lock); |
|
INIT_LIST_HEAD(&cam->buffer_queue); |
|
cam->mmio = viadev->engine_mmio; |
|
cam->fbmem = viadev->fbmem; |
|
cam->fb_offset = viadev->camera_fbmem_offset; |
|
cam->flags = 1 << CF_CONFIG_NEEDED; |
|
cam->mbus_code = via_def_mbus_code; |
|
/* |
|
* Tell V4L that we exist. |
|
*/ |
|
ret = v4l2_device_register(&pdev->dev, &cam->v4l2_dev); |
|
if (ret) { |
|
dev_err(&pdev->dev, "Unable to register v4l2 device\n"); |
|
goto out_free; |
|
} |
|
ret = v4l2_ctrl_handler_init(&cam->ctrl_handler, 10); |
|
if (ret) |
|
goto out_unregister; |
|
cam->v4l2_dev.ctrl_handler = &cam->ctrl_handler; |
|
/* |
|
* Convince the system that we can do DMA. |
|
*/ |
|
pdev->dev.dma_mask = &viadev->pdev->dma_mask; |
|
dma_set_mask(&pdev->dev, 0xffffffff); |
|
/* |
|
* Fire up the capture port. The write to 0x78 looks purely |
|
* OLPCish; any system will need to tweak 0x1e. |
|
*/ |
|
via_write_reg_mask(VIASR, 0x78, 0, 0x80); |
|
via_write_reg_mask(VIASR, 0x1e, 0xc0, 0xc0); |
|
/* |
|
* Get the sensor powered up. |
|
*/ |
|
ret = via_sensor_power_setup(cam); |
|
if (ret) |
|
goto out_ctrl_hdl_free; |
|
via_sensor_power_up(cam); |
|
|
|
/* |
|
* See if we can't find it on the bus. The VIA_PORT_31 assumption |
|
* is OLPC-specific. 0x42 assumption is ov7670-specific. |
|
*/ |
|
sensor_adapter = viafb_find_i2c_adapter(VIA_PORT_31); |
|
cam->sensor = v4l2_i2c_new_subdev_board(&cam->v4l2_dev, sensor_adapter, |
|
&ov7670_info, NULL); |
|
if (cam->sensor == NULL) { |
|
dev_err(&pdev->dev, "Unable to find the sensor!\n"); |
|
ret = -ENODEV; |
|
goto out_power_down; |
|
} |
|
/* |
|
* Get the IRQ. |
|
*/ |
|
viacam_int_disable(cam); |
|
ret = request_threaded_irq(viadev->pdev->irq, viacam_quick_irq, |
|
viacam_irq, IRQF_SHARED, "via-camera", cam); |
|
if (ret) |
|
goto out_power_down; |
|
|
|
vq = &cam->vq; |
|
vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ; |
|
vq->drv_priv = cam; |
|
vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
|
vq->buf_struct_size = sizeof(struct via_buffer); |
|
vq->dev = cam->v4l2_dev.dev; |
|
|
|
vq->ops = &viacam_vb2_ops; |
|
vq->mem_ops = &vb2_dma_sg_memops; |
|
vq->lock = &cam->lock; |
|
|
|
ret = vb2_queue_init(vq); |
|
/* |
|
* Tell V4l2 that we exist. |
|
*/ |
|
cam->vdev = viacam_v4l_template; |
|
cam->vdev.v4l2_dev = &cam->v4l2_dev; |
|
cam->vdev.lock = &cam->lock; |
|
cam->vdev.queue = vq; |
|
video_set_drvdata(&cam->vdev, cam); |
|
ret = video_register_device(&cam->vdev, VFL_TYPE_VIDEO, -1); |
|
if (ret) |
|
goto out_irq; |
|
|
|
#ifdef CONFIG_PM |
|
/* |
|
* Hook into PM events |
|
*/ |
|
viacam_pm_hooks.private = cam; |
|
viafb_pm_register(&viacam_pm_hooks); |
|
#endif |
|
|
|
/* Power the sensor down until somebody opens the device */ |
|
via_sensor_power_down(cam); |
|
return 0; |
|
|
|
out_irq: |
|
free_irq(viadev->pdev->irq, cam); |
|
out_power_down: |
|
via_sensor_power_release(cam); |
|
out_ctrl_hdl_free: |
|
v4l2_ctrl_handler_free(&cam->ctrl_handler); |
|
out_unregister: |
|
v4l2_device_unregister(&cam->v4l2_dev); |
|
out_free: |
|
kfree(cam); |
|
return ret; |
|
} |
|
|
|
static int viacam_remove(struct platform_device *pdev) |
|
{ |
|
struct via_camera *cam = via_cam_info; |
|
struct viafb_dev *viadev = pdev->dev.platform_data; |
|
|
|
video_unregister_device(&cam->vdev); |
|
v4l2_device_unregister(&cam->v4l2_dev); |
|
#ifdef CONFIG_PM |
|
viafb_pm_unregister(&viacam_pm_hooks); |
|
#endif |
|
free_irq(viadev->pdev->irq, cam); |
|
via_sensor_power_release(cam); |
|
v4l2_ctrl_handler_free(&cam->ctrl_handler); |
|
kfree(cam); |
|
via_cam_info = NULL; |
|
return 0; |
|
} |
|
|
|
static struct platform_driver viacam_driver = { |
|
.driver = { |
|
.name = "viafb-camera", |
|
}, |
|
.probe = viacam_probe, |
|
.remove = viacam_remove, |
|
}; |
|
|
|
module_platform_driver(viacam_driver);
|
|
|