/* * This is the driver for the STA2x11 Video Input Port. * * Copyright (C) 2010 WindRiver Systems, Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * * The full GNU General Public License is included in this distribution in * the file called "COPYING". * * Author: Andreas Kies * Vlad Lungu * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sta2x11_vip.h" #define DRV_NAME "sta2x11_vip" #define DRV_VERSION "1.3" #ifndef PCI_DEVICE_ID_STMICRO_VIP #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D #endif #define MAX_FRAMES 4 /*Register offsets*/ #define DVP_CTL 0x00 #define DVP_TFO 0x04 #define DVP_TFS 0x08 #define DVP_BFO 0x0C #define DVP_BFS 0x10 #define DVP_VTP 0x14 #define DVP_VBP 0x18 #define DVP_VMP 0x1C #define DVP_ITM 0x98 #define DVP_ITS 0x9C #define DVP_STA 0xA0 #define DVP_HLFLN 0xA8 #define DVP_RGB 0xC0 #define DVP_PKZ 0xF0 /*Register fields*/ #define DVP_CTL_ENA 0x00000001 #define DVP_CTL_RST 0x80000000 #define DVP_CTL_DIS (~0x00040001) #define DVP_IT_VSB 0x00000008 #define DVP_IT_VST 0x00000010 #define DVP_IT_FIFO 0x00000020 #define DVP_HLFLN_SD 0x00000001 #define REG_WRITE(vip, reg, value) iowrite32((value), (vip->iomem)+(reg)) #define REG_READ(vip, reg) ioread32((vip->iomem)+(reg)) #define SAVE_COUNT 8 #define AUX_COUNT 3 #define IRQ_COUNT 1 /** * struct sta2x11_vip - All internal data for one instance of device * @v4l2_dev: device registered in v4l layer * @video_dev: properties of our device * @pdev: PCI device * @adapter: contains I2C adapter information * @register_save_area: All relevant register are saved here during suspend * @decoder: contains information about video DAC * @format: pixel format, fixed UYVY * @std: video standard (e.g. PAL/NTSC) * @input: input line for video signal ( 0 or 1 ) * @users: Number of open of device ( max. 1 ) * @disabled: Device is in power down state * @mutex: ensures exclusive opening of device * @slock: for excluse acces of registers * @vb_vidq: queue maintained by videobuf layer * @capture: linked list of capture buffer * @active: struct videobuf_buffer currently beingg filled * @started: device is ready to capture frame * @closing: device will be shut down * @tcount: Number of top frames * @bcount: Number of bottom frames * @overflow: Number of FIFO overflows * @mem_spare: small buffer of unused frame * @dma_spare: dma addres of mem_spare * @iomem: hardware base address * @config: I2C and gpio config from platform * * All non-local data is accessed via this structure. */ struct sta2x11_vip { struct v4l2_device v4l2_dev; struct video_device *video_dev; struct pci_dev *pdev; struct i2c_adapter *adapter; unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT]; struct v4l2_subdev *decoder; struct v4l2_pix_format format; v4l2_std_id std; unsigned int input; int users; int disabled; struct mutex mutex; /* exclusive access during open */ spinlock_t slock; /* spin lock for hardware and queue access */ struct videobuf_queue vb_vidq; struct list_head capture; struct videobuf_buffer *active; int started, closing, tcount, bcount; int overflow; void *mem_spare; dma_addr_t dma_spare; void *iomem; struct vip_config *config; }; static const unsigned int registers_to_save[AUX_COUNT] = { DVP_HLFLN, DVP_RGB, DVP_PKZ }; static struct v4l2_pix_format formats_50[] = { { /*PAL interlaced */ .width = 720, .height = 576, .pixelformat = V4L2_PIX_FMT_UYVY, .field = V4L2_FIELD_INTERLACED, .bytesperline = 720 * 2, .sizeimage = 720 * 2 * 576, .colorspace = V4L2_COLORSPACE_SMPTE170M}, { /*PAL top */ .width = 720, .height = 288, .pixelformat = V4L2_PIX_FMT_UYVY, .field = V4L2_FIELD_TOP, .bytesperline = 720 * 2, .sizeimage = 720 * 2 * 288, .colorspace = V4L2_COLORSPACE_SMPTE170M}, { /*PAL bottom */ .width = 720, .height = 288, .pixelformat = V4L2_PIX_FMT_UYVY, .field = V4L2_FIELD_BOTTOM, .bytesperline = 720 * 2, .sizeimage = 720 * 2 * 288, .colorspace = V4L2_COLORSPACE_SMPTE170M}, }; static struct v4l2_pix_format formats_60[] = { { /*NTSC interlaced */ .width = 720, .height = 480, .pixelformat = V4L2_PIX_FMT_UYVY, .field = V4L2_FIELD_INTERLACED, .bytesperline = 720 * 2, .sizeimage = 720 * 2 * 480, .colorspace = V4L2_COLORSPACE_SMPTE170M}, { /*NTSC top */ .width = 720, .height = 240, .pixelformat = V4L2_PIX_FMT_UYVY, .field = V4L2_FIELD_TOP, .bytesperline = 720 * 2, .sizeimage = 720 * 2 * 240, .colorspace = V4L2_COLORSPACE_SMPTE170M}, { /*NTSC bottom */ .width = 720, .height = 240, .pixelformat = V4L2_PIX_FMT_UYVY, .field = V4L2_FIELD_BOTTOM, .bytesperline = 720 * 2, .sizeimage = 720 * 2 * 240, .colorspace = V4L2_COLORSPACE_SMPTE170M}, }; /** * buf_setup - Get size and number of video buffer * @vq: queue in videobuf * @count: Number of buffers (1..MAX_FRAMES). * 0 use default value. * @size: size of buffer in bytes * * returns size and number of buffers * a preset value of 0 returns the default number. * return value: 0, always succesfull. */ static int buf_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) { struct sta2x11_vip *vip = vq->priv_data; *size = vip->format.width * vip->format.height * 2; if (0 == *count || MAX_FRAMES < *count) *count = MAX_FRAMES; return 0; }; /** * buf_prepare - prepare buffer for usage * @vq: queue in videobuf layer * @vb: buffer to be prepared * @field: type of video data (interlaced/non-interlaced) * * Allocate or realloc buffer * return value: 0, successful. * * -EINVAL, supplied buffer is too small. * * other, buffer could not be locked. */ static int buf_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, enum v4l2_field field) { struct sta2x11_vip *vip = vq->priv_data; int ret; vb->size = vip->format.width * vip->format.height * 2; if ((0 != vb->baddr) && (vb->bsize < vb->size)) return -EINVAL; vb->width = vip->format.width; vb->height = vip->format.height; vb->field = field; if (VIDEOBUF_NEEDS_INIT == vb->state) { ret = videobuf_iolock(vq, vb, NULL); if (ret) goto fail; } vb->state = VIDEOBUF_PREPARED; return 0; fail: videobuf_dma_contig_free(vq, vb); vb->state = VIDEOBUF_NEEDS_INIT; return ret; } /** * buf_queu - queue buffer for filling * @vq: queue in videobuf layer * @vb: buffer to be queued * * if capturing is already running, the buffer will be queued. Otherwise * capture is started and the buffer is used directly. */ static void buf_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) { struct sta2x11_vip *vip = vq->priv_data; u32 dma; vb->state = VIDEOBUF_QUEUED; if (vip->active) { list_add_tail(&vb->queue, &vip->capture); return; } vip->started = 1; vip->tcount = 0; vip->bcount = 0; vip->active = vb; vb->state = VIDEOBUF_ACTIVE; dma = videobuf_to_dma_contig(vb); REG_WRITE(vip, DVP_TFO, (0 << 16) | (0)); /* despite of interlace mode, upper and lower frames start at zero */ REG_WRITE(vip, DVP_BFO, (0 << 16) | (0)); switch (vip->format.field) { case V4L2_FIELD_INTERLACED: REG_WRITE(vip, DVP_TFS, ((vip->format.height / 2 - 1) << 16) | (2 * vip->format.width - 1)); REG_WRITE(vip, DVP_BFS, ((vip->format.height / 2 - 1) << 16) | (2 * vip->format.width - 1)); REG_WRITE(vip, DVP_VTP, dma); REG_WRITE(vip, DVP_VBP, dma + vip->format.width * 2); REG_WRITE(vip, DVP_VMP, 4 * vip->format.width); break; case V4L2_FIELD_TOP: REG_WRITE(vip, DVP_TFS, ((vip->format.height - 1) << 16) | (2 * vip->format.width - 1)); REG_WRITE(vip, DVP_BFS, ((0) << 16) | (2 * vip->format.width - 1)); REG_WRITE(vip, DVP_VTP, dma); REG_WRITE(vip, DVP_VBP, dma); REG_WRITE(vip, DVP_VMP, 2 * vip->format.width); break; case V4L2_FIELD_BOTTOM: REG_WRITE(vip, DVP_TFS, ((0) << 16) | (2 * vip->format.width - 1)); REG_WRITE(vip, DVP_BFS, ((vip->format.height) << 16) | (2 * vip->format.width - 1)); REG_WRITE(vip, DVP_VTP, dma); REG_WRITE(vip, DVP_VBP, dma); REG_WRITE(vip, DVP_VMP, 2 * vip->format.width); break; default: pr_warning("VIP: unknown field format\n"); return; } REG_WRITE(vip, DVP_CTL, DVP_CTL_ENA); } /** * buff_release - release buffer * @vq: queue in videobuf layer * @vb: buffer to be released * * release buffer in videobuf layer */ static void buf_release(struct videobuf_queue *vq, struct videobuf_buffer *vb) { videobuf_dma_contig_free(vq, vb); vb->state = VIDEOBUF_NEEDS_INIT; } static struct videobuf_queue_ops vip_qops = { .buf_setup = buf_setup, .buf_prepare = buf_prepare, .buf_queue = buf_queue, .buf_release = buf_release, }; /** * vip_open - open video device * @file: descriptor of device * * open device, make sure it is only opened once. * return value: 0, no error. * * -EBUSY, device is already opened * * -ENOMEM, no memory for auxiliary DMA buffer */ static int vip_open(struct file *file) { struct video_device *dev = video_devdata(file); struct sta2x11_vip *vip = video_get_drvdata(dev); mutex_lock(&vip->mutex); vip->users++; if (vip->users > 1) { vip->users--; mutex_unlock(&vip->mutex); return -EBUSY; } file->private_data = dev; vip->overflow = 0; vip->started = 0; vip->closing = 0; vip->active = NULL; INIT_LIST_HEAD(&vip->capture); vip->mem_spare = dma_alloc_coherent(&vip->pdev->dev, 64, &vip->dma_spare, GFP_KERNEL); if (!vip->mem_spare) { vip->users--; mutex_unlock(&vip->mutex); return -ENOMEM; } mutex_unlock(&vip->mutex); videobuf_queue_dma_contig_init_cached(&vip->vb_vidq, &vip_qops, &vip->pdev->dev, &vip->slock, V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_INTERLACED, sizeof(struct videobuf_buffer), vip, NULL); REG_READ(vip, DVP_ITS); REG_WRITE(vip, DVP_HLFLN, DVP_HLFLN_SD); REG_WRITE(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); REG_WRITE(vip, DVP_CTL, DVP_CTL_RST); REG_WRITE(vip, DVP_CTL, 0); REG_READ(vip, DVP_ITS); return 0; } /** * vip_close - close video device * @file: descriptor of device * * close video device, wait until all pending operations are finished * ( maximum FRAME_MAX buffers pending ) * Turn off interrupts. * * return value: 0, always succesful. */ static int vip_close(struct file *file) { struct video_device *dev = video_devdata(file); struct sta2x11_vip *vip = video_get_drvdata(dev); vip->closing = 1; if (vip->active) videobuf_waiton(&vip->vb_vidq, vip->active, 0, 0); spin_lock_irq(&vip->slock); REG_WRITE(vip, DVP_ITM, 0); REG_WRITE(vip, DVP_CTL, DVP_CTL_RST); REG_WRITE(vip, DVP_CTL, 0); REG_READ(vip, DVP_ITS); vip->started = 0; vip->active = NULL; spin_unlock_irq(&vip->slock); videobuf_stop(&vip->vb_vidq); videobuf_mmap_free(&vip->vb_vidq); dma_free_coherent(&vip->pdev->dev, 64, vip->mem_spare, vip->dma_spare); file->private_data = NULL; mutex_lock(&vip->mutex); vip->users--; mutex_unlock(&vip->mutex); return 0; } /** * vip_read - read from video input * @file: descriptor of device * @data: user buffer * @count: number of bytes to be read * @ppos: position within stream * * read video data from video device. * handling is done in generic videobuf layer * return value: provided by videobuf layer */ static ssize_t vip_read(struct file *file, char __user *data, size_t count, loff_t *ppos) { struct video_device *dev = file->private_data; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_read_stream(&vip->vb_vidq, data, count, ppos, 0, file->f_flags & O_NONBLOCK); } /** * vip_mmap - map user buffer * @file: descriptor of device * @vma: user buffer * * map user space buffer into kernel mode, including DMA address. * handling is done in generic videobuf layer. * return value: provided by videobuf layer */ static int vip_mmap(struct file *file, struct vm_area_struct *vma) { struct video_device *dev = file->private_data; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_mmap_mapper(&vip->vb_vidq, vma); } /** * vip_poll - poll for event * @file: descriptor of device * @wait: contains events to be waited for * * wait for event related to video device. * handling is done in generic videobuf layer. * return value: provided by videobuf layer */ static unsigned int vip_poll(struct file *file, struct poll_table_struct *wait) { struct video_device *dev = file->private_data; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_poll_stream(file, &vip->vb_vidq, wait); } /** * vidioc_querycap - return capabilities of device * @file: descriptor of device (not used) * @priv: points to current videodevice * @cap: contains return values * * the capabilities of the device are returned * * return value: 0, no error. */ static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); memset(cap, 0, sizeof(struct v4l2_capability)); strcpy(cap->driver, DRV_NAME); strcpy(cap->card, DRV_NAME); cap->version = 0; snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", pci_name(vip->pdev)); cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; return 0; } /** * vidioc_s_std - set video standard * @file: descriptor of device (not used) * @priv: points to current videodevice * @std: contains standard to be set * * the video standard is set * * return value: 0, no error. * * -EIO, no input signal detected * * other, returned from video DAC. */ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *std) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); v4l2_std_id oldstd = vip->std, newstd; int status; if (V4L2_STD_ALL == *std) { v4l2_subdev_call(vip->decoder, core, s_std, *std); ssleep(2); v4l2_subdev_call(vip->decoder, video, querystd, &newstd); v4l2_subdev_call(vip->decoder, video, g_input_status, &status); if (status & V4L2_IN_ST_NO_SIGNAL) return -EIO; *std = vip->std = newstd; if (oldstd != *std) { if (V4L2_STD_525_60 & (*std)) vip->format = formats_60[0]; else vip->format = formats_50[0]; } return 0; } if (oldstd != *std) { if (V4L2_STD_525_60 & (*std)) vip->format = formats_60[0]; else vip->format = formats_50[0]; } return v4l2_subdev_call(vip->decoder, core, s_std, *std); } /** * vidioc_g_std - get video standard * @file: descriptor of device (not used) * @priv: points to current videodevice * @std: contains return values * * the current video standard is returned * * return value: 0, no error. */ static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); *std = vip->std; return 0; } /** * vidioc_querystd - get possible video standards * @file: descriptor of device (not used) * @priv: points to current videodevice * @std: contains return values * * all possible video standards are returned * * return value: delivered by video DAC routine. */ static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return v4l2_subdev_call(vip->decoder, video, querystd, std); } /** * vidioc_queryctl - get possible control settings * @file: descriptor of device (not used) * @priv: points to current videodevice * @ctrl: contains return values * * return possible values for a control * return value: delivered by video DAC routine. */ static int vidioc_queryctrl(struct file *file, void *priv, struct v4l2_queryctrl *ctrl) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return v4l2_subdev_call(vip->decoder, core, queryctrl, ctrl); } /** * vidioc_g_ctl - get control value * @file: descriptor of device (not used) * @priv: points to current videodevice * @ctrl: contains return values * * return setting for a control value * return value: delivered by video DAC routine. */ static int vidioc_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return v4l2_subdev_call(vip->decoder, core, g_ctrl, ctrl); } /** * vidioc_s_ctl - set control value * @file: descriptor of device (not used) * @priv: points to current videodevice * @ctrl: contains value to be set * * set value for a specific control * return value: delivered by video DAC routine. */ static int vidioc_s_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return v4l2_subdev_call(vip->decoder, core, s_ctrl, ctrl); } /** * vidioc_enum_input - return name of input line * @file: descriptor of device (not used) * @priv: points to current videodevice * @inp: contains return values * * the user friendly name of the input line is returned * * return value: 0, no error. * * -EINVAL, input line number out of range */ static int vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *inp) { if (inp->index > 1) return -EINVAL; inp->type = V4L2_INPUT_TYPE_CAMERA; inp->std = V4L2_STD_ALL; sprintf(inp->name, "Camera %u", inp->index); return 0; } /** * vidioc_s_input - set input line * @file: descriptor of device ( not used) * @priv: points to current videodevice * @i: new input line number * * the current active input line is set * * return value: 0, no error. * * -EINVAL, line number out of range */ static int vidioc_s_input(struct file *file, void *priv, unsigned int i) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); int ret; if (i > 1) return -EINVAL; ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); if (!ret) vip->input = i; return 0; } /** * vidioc_g_input - return input line * @file: descriptor of device ( not used) * @priv: points to current videodevice * @i: returned input line number * * the current active input line is returned * * return value: always 0. */ static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); *i = vip->input; return 0; } /** * vidioc_enum_fmt_vid_cap - return video capture format * @file: descriptor of device ( not used) * @priv: points to current videodevice * @f: returned format information * * returns name and format of video capture * Only UYVY is supported by hardware. * * return value: always 0. */ static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { if (f->index != 0) return -EINVAL; strcpy(f->description, "4:2:2, packed, UYVY"); f->pixelformat = V4L2_PIX_FMT_UYVY; f->flags = 0; return 0; } /** * vidioc_try_fmt_vid_cap - set video capture format * @file: descriptor of device ( not used) * @priv: points to current videodevice * @f: new format * * new video format is set which includes width and * field type. width is fixed to 720, no scaling. * Only UYVY is supported by this hardware. * the minimum height is 200, the maximum is 576 (PAL) * * return value: 0, no error * * -EINVAL, pixel or field format not supported * */ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); int interlace_lim; if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) return -EINVAL; if (V4L2_STD_525_60 & vip->std) interlace_lim = 240; else interlace_lim = 288; switch (f->fmt.pix.field) { case V4L2_FIELD_ANY: if (interlace_lim < f->fmt.pix.height) f->fmt.pix.field = V4L2_FIELD_INTERLACED; else f->fmt.pix.field = V4L2_FIELD_BOTTOM; break; case V4L2_FIELD_TOP: case V4L2_FIELD_BOTTOM: if (interlace_lim < f->fmt.pix.height) f->fmt.pix.height = interlace_lim; break; case V4L2_FIELD_INTERLACED: break; default: return -EINVAL; } f->fmt.pix.height &= ~1; if (2 * interlace_lim < f->fmt.pix.height) f->fmt.pix.height = 2 * interlace_lim; if (200 > f->fmt.pix.height) f->fmt.pix.height = 200; f->fmt.pix.width = 720; f->fmt.pix.bytesperline = f->fmt.pix.width * 2; f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; f->fmt.pix.priv = 0; return 0; } /** * vidioc_s_fmt_vid_cap - set current video format parameters * @file: descriptor of device ( not used) * @priv: points to current videodevice * @f: returned format information * * set new capture format * return value: 0, no error * * other, delivered by video DAC routine. */ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); int ret; ret = vidioc_try_fmt_vid_cap(file, priv, f); if (ret) return ret; memcpy(&vip->format, &f->fmt.pix, sizeof(struct v4l2_pix_format)); return 0; } /** * vidioc_g_fmt_vid_cap - get current video format parameters * @file: descriptor of device ( not used) * @priv: points to current videodevice * @f: contains format information * * returns current video format parameters * * return value: 0, always successful */ static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); memcpy(&f->fmt.pix, &vip->format, sizeof(struct v4l2_pix_format)); return 0; } /** * vidioc_reqfs - request buffer * @file: descriptor of device ( not used) * @priv: points to current videodevice * @p: video buffer * * Handling is done in generic videobuf layer. */ static int vidioc_reqbufs(struct file *file, void *priv, struct v4l2_requestbuffers *p) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_reqbufs(&vip->vb_vidq, p); } /** * vidioc_querybuf - query buffer * @file: descriptor of device ( not used) * @priv: points to current videodevice * @p: video buffer * * query buffer state. * Handling is done in generic videobuf layer. */ static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_querybuf(&vip->vb_vidq, p); } /** * vidioc_qbuf - queue a buffer * @file: descriptor of device ( not used) * @priv: points to current videodevice * @p: video buffer * * Handling is done in generic videobuf layer. */ static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_qbuf(&vip->vb_vidq, p); } /** * vidioc_dqbuf - dequeue a buffer * @file: descriptor of device ( not used) * @priv: points to current videodevice * @p: video buffer * * Handling is done in generic videobuf layer. */ static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_dqbuf(&vip->vb_vidq, p, file->f_flags & O_NONBLOCK); } /** * vidioc_streamon - turn on streaming * @file: descriptor of device ( not used) * @priv: points to current videodevice * @type: type of capture * * turn on streaming. * Handling is done in generic videobuf layer. */ static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type type) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_streamon(&vip->vb_vidq); } /** * vidioc_streamoff - turn off streaming * @file: descriptor of device ( not used) * @priv: points to current videodevice * @type: type of capture * * turn off streaming. * Handling is done in generic videobuf layer. */ static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type type) { struct video_device *dev = priv; struct sta2x11_vip *vip = video_get_drvdata(dev); return videobuf_streamoff(&vip->vb_vidq); } static const struct v4l2_file_operations vip_fops = { .owner = THIS_MODULE, .open = vip_open, .release = vip_close, .ioctl = video_ioctl2, .read = vip_read, .mmap = vip_mmap, .poll = vip_poll }; static const struct v4l2_ioctl_ops vip_ioctl_ops = { .vidioc_querycap = vidioc_querycap, .vidioc_s_std = vidioc_s_std, .vidioc_g_std = vidioc_g_std, .vidioc_querystd = vidioc_querystd, .vidioc_queryctrl = vidioc_queryctrl, .vidioc_g_ctrl = vidioc_g_ctrl, .vidioc_s_ctrl = vidioc_s_ctrl, .vidioc_enum_input = vidioc_enum_input, .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, .vidioc_s_input = vidioc_s_input, .vidioc_g_input = vidioc_g_input, .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, .vidioc_g_fmt_vid_cap = vidioc_g_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, }; static struct video_device video_dev_template = { .name = DRV_NAME, .release = video_device_release, .fops = &vip_fops, .ioctl_ops = &vip_ioctl_ops, .tvnorms = V4L2_STD_ALL, }; /** * vip_irq - interrupt routine * @irq: Number of interrupt ( not used, correct number is assumed ) * @vip: local data structure containing all information * * check for both frame interrupts set ( top and bottom ). * check FIFO overflow, but limit number of log messages after open. * signal a complete buffer if done. * dequeue a new buffer if available. * disable VIP if no buffer available. * * return value: IRQ_NONE, interrupt was not generated by VIP * * IRQ_HANDLED, interrupt done. */ static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) { u32 status, dma; unsigned long flags; struct videobuf_buffer *vb; status = REG_READ(vip, DVP_ITS); if (!status) { pr_debug("VIP: irq ignored\n"); return IRQ_NONE; } if (!vip->started) return IRQ_HANDLED; if (status & DVP_IT_VSB) vip->bcount++; if (status & DVP_IT_VST) vip->tcount++; if ((DVP_IT_VSB | DVP_IT_VST) == (status & (DVP_IT_VST | DVP_IT_VSB))) { /* this is bad, we are too slow, hope the condition is gone * on the next frame */ pr_info("VIP: both irqs\n"); return IRQ_HANDLED; } if (status & DVP_IT_FIFO) { if (5 > vip->overflow++) pr_info("VIP: fifo overflow\n"); } if (2 > vip->tcount) return IRQ_HANDLED; if (status & DVP_IT_VSB) return IRQ_HANDLED; spin_lock_irqsave(&vip->slock, flags); REG_WRITE(vip, DVP_CTL, REG_READ(vip, DVP_CTL) & ~DVP_CTL_ENA); if (vip->active) { v4l2_get_timestamp(&vip->active->ts); vip->active->field_count++; vip->active->state = VIDEOBUF_DONE; wake_up(&vip->active->done); vip->active = NULL; } if (!vip->closing) { if (list_empty(&vip->capture)) goto done; vb = list_first_entry(&vip->capture, struct videobuf_buffer, queue); if (NULL == vb) { pr_info("VIP: no buffer\n"); goto done; } vb->state = VIDEOBUF_ACTIVE; list_del(&vb->queue); vip->active = vb; dma = videobuf_to_dma_contig(vb); switch (vip->format.field) { case V4L2_FIELD_INTERLACED: REG_WRITE(vip, DVP_VTP, dma); REG_WRITE(vip, DVP_VBP, dma + vip->format.width * 2); break; case V4L2_FIELD_TOP: case V4L2_FIELD_BOTTOM: REG_WRITE(vip, DVP_VTP, dma); REG_WRITE(vip, DVP_VBP, dma); break; default: pr_warning("VIP: unknown field format\n"); goto done; break; } REG_WRITE(vip, DVP_CTL, REG_READ(vip, DVP_CTL) | DVP_CTL_ENA); } done: spin_unlock_irqrestore(&vip->slock, flags); return IRQ_HANDLED; } /** * vip_gpio_reserve - reserve gpio pin * @dev: device * @pin: GPIO pin number * @dir: direction, input or output * @name: GPIO pin name * */ static int vip_gpio_reserve(struct device *dev, int pin, int dir, const char *name) { int ret; if (pin == -1) return 0; ret = gpio_request(pin, name); if (ret) { dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); return ret; } ret = gpio_direction_output(pin, dir); if (ret) { dev_err(dev, "Failed to set direction for pin %d (%s)\n", pin, name); gpio_free(pin); return ret; } ret = gpio_export(pin, false); if (ret) { dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); gpio_free(pin); return ret; } return 0; } /** * vip_gpio_release - release gpio pin * @dev: device * @pin: GPIO pin number * @name: GPIO pin name * */ static void vip_gpio_release(struct device *dev, int pin, const char *name) { if (pin != -1) { dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); gpio_unexport(pin); gpio_free(pin); } } /** * sta2x11_vip_init_one - init one instance of video device * @pdev: PCI device * @ent: (not used) * * allocate reset pins for DAC. * Reset video DAC, this is done via reset line. * allocate memory for managing device * request interrupt * map IO region * register device * find and initialize video DAC * * return value: 0, no error * * -ENOMEM, no memory * * -ENODEV, device could not be detected or registered */ static int __devinit sta2x11_vip_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { int ret; struct sta2x11_vip *vip; struct vip_config *config; ret = pci_enable_device(pdev); if (ret) return ret; config = dev_get_platdata(&pdev->dev); if (!config) { dev_info(&pdev->dev, "VIP slot disabled\n"); ret = -EINVAL; goto disable; } ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, config->pwr_name); if (ret) goto disable; if (config->reset_pin >= 0) { ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, config->reset_name); if (ret) { vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); goto disable; } } if (config->pwr_pin != -1) { /* Datasheet says 5ms between PWR and RST */ usleep_range(5000, 25000); ret = gpio_direction_output(config->pwr_pin, 1); } if (config->reset_pin != -1) { /* Datasheet says 5ms between PWR and RST */ usleep_range(5000, 25000); ret = gpio_direction_output(config->reset_pin, 1); } usleep_range(5000, 25000); vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); if (!vip) { ret = -ENOMEM; goto release_gpios; } vip->pdev = pdev; vip->std = V4L2_STD_PAL; vip->format = formats_50[0]; vip->config = config; if (v4l2_device_register(&pdev->dev, &vip->v4l2_dev)) goto free_mem; dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", (unsigned long)pci_resource_start(pdev, 0), (unsigned long)pci_resource_len(pdev, 0), pdev->irq); pci_set_master(pdev); ret = pci_request_regions(pdev, DRV_NAME); if (ret) goto unreg; vip->iomem = pci_iomap(pdev, 0, 0x100); if (!vip->iomem) { ret = -ENOMEM; /* FIXME */ goto release; } pci_enable_msi(pdev); INIT_LIST_HEAD(&vip->capture); spin_lock_init(&vip->slock); mutex_init(&vip->mutex); vip->started = 0; vip->disabled = 0; ret = request_irq(pdev->irq, (irq_handler_t) vip_irq, IRQF_SHARED, DRV_NAME, vip); if (ret) { dev_err(&pdev->dev, "request_irq failed\n"); ret = -ENODEV; goto unmap; } vip->video_dev = video_device_alloc(); if (!vip->video_dev) { ret = -ENOMEM; goto release_irq; } *(vip->video_dev) = video_dev_template; video_set_drvdata(vip->video_dev, vip); ret = video_register_device(vip->video_dev, VFL_TYPE_GRABBER, -1); if (ret) goto vrelease; vip->adapter = i2c_get_adapter(vip->config->i2c_id); if (!vip->adapter) { ret = -ENODEV; dev_err(&pdev->dev, "no I2C adapter found\n"); goto vunreg; } vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, "adv7180", vip->config->i2c_addr, NULL); if (!vip->decoder) { ret = -ENODEV; dev_err(&pdev->dev, "no decoder found\n"); goto vunreg; } i2c_put_adapter(vip->adapter); v4l2_subdev_call(vip->decoder, core, init, 0); pr_info("STA2X11 Video Input Port (VIP) loaded\n"); return 0; vunreg: video_set_drvdata(vip->video_dev, NULL); vrelease: if (video_is_registered(vip->video_dev)) video_unregister_device(vip->video_dev); else video_device_release(vip->video_dev); release_irq: free_irq(pdev->irq, vip); pci_disable_msi(pdev); unmap: pci_iounmap(pdev, vip->iomem); mutex_destroy(&vip->mutex); release: pci_release_regions(pdev); unreg: v4l2_device_unregister(&vip->v4l2_dev); free_mem: kfree(vip); release_gpios: vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); disable: /* * do not call pci_disable_device on sta2x11 because it break all * other Bus masters on this EP */ return ret; } /** * sta2x11_vip_remove_one - release device * @pdev: PCI device * * Undo everything done in .._init_one * * unregister video device * free interrupt * unmap ioadresses * free memory * free GPIO pins */ static void __devexit sta2x11_vip_remove_one(struct pci_dev *pdev) { struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); struct sta2x11_vip *vip = container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); video_set_drvdata(vip->video_dev, NULL); video_unregister_device(vip->video_dev); /*do not call video_device_release() here, is already done */ free_irq(pdev->irq, vip); pci_disable_msi(pdev); pci_iounmap(pdev, vip->iomem); pci_release_regions(pdev); v4l2_device_unregister(&vip->v4l2_dev); mutex_destroy(&vip->mutex); vip_gpio_release(&pdev->dev, vip->config->pwr_pin, vip->config->pwr_name); vip_gpio_release(&pdev->dev, vip->config->reset_pin, vip->config->reset_name); kfree(vip); /* * do not call pci_disable_device on sta2x11 because it break all * other Bus masters on this EP */ } #ifdef CONFIG_PM /** * sta2x11_vip_suspend - set device into power save mode * @pdev: PCI device * @state: new state of device * * all relevant registers are saved and an attempt to set a new state is made. * * return value: 0 always indicate success, * even if device could not be disabled. (workaround for hardware problem) * * reurn value : 0, always succesful, even if hardware does not not support * power down mode. */ static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state) { struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); struct sta2x11_vip *vip = container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); unsigned long flags; int i; spin_lock_irqsave(&vip->slock, flags); vip->register_save_area[0] = REG_READ(vip, DVP_CTL); REG_WRITE(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); vip->register_save_area[SAVE_COUNT] = REG_READ(vip, DVP_ITM); REG_WRITE(vip, DVP_ITM, 0); for (i = 1; i < SAVE_COUNT; i++) vip->register_save_area[i] = REG_READ(vip, 4 * i); for (i = 0; i < AUX_COUNT; i++) vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = REG_READ(vip, registers_to_save[i]); spin_unlock_irqrestore(&vip->slock, flags); /* save pci state */ pci_save_state(pdev); if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) { /* * do not call pci_disable_device on sta2x11 because it * break all other Bus masters on this EP */ vip->disabled = 1; } pr_info("VIP: suspend\n"); return 0; } /** * sta2x11_vip_resume - resume device operation * @pdev : PCI device * * re-enable device, set PCI state to powered and restore registers. * resume normal device operation afterwards. * * return value: 0, no error. * * other, could not set device to power on state. */ static int sta2x11_vip_resume(struct pci_dev *pdev) { struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); struct sta2x11_vip *vip = container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); unsigned long flags; int ret, i; pr_info("VIP: resume\n"); /* restore pci state */ if (vip->disabled) { ret = pci_enable_device(pdev); if (ret) { pr_warning("VIP: Can't enable device.\n"); return ret; } vip->disabled = 0; } ret = pci_set_power_state(pdev, PCI_D0); if (ret) { /* * do not call pci_disable_device on sta2x11 because it * break all other Bus masters on this EP */ pr_warning("VIP: Can't enable device.\n"); vip->disabled = 1; return ret; } pci_restore_state(pdev); spin_lock_irqsave(&vip->slock, flags); for (i = 1; i < SAVE_COUNT; i++) REG_WRITE(vip, 4 * i, vip->register_save_area[i]); for (i = 0; i < AUX_COUNT; i++) REG_WRITE(vip, registers_to_save[i], vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); REG_WRITE(vip, DVP_CTL, vip->register_save_area[0]); REG_WRITE(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); spin_unlock_irqrestore(&vip->slock, flags); return 0; } #endif static DEFINE_PCI_DEVICE_TABLE(sta2x11_vip_pci_tbl) = { {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, {0,} }; static struct pci_driver sta2x11_vip_driver = { .name = DRV_NAME, .probe = sta2x11_vip_init_one, .remove = __devexit_p(sta2x11_vip_remove_one), .id_table = sta2x11_vip_pci_tbl, #ifdef CONFIG_PM .suspend = sta2x11_vip_suspend, .resume = sta2x11_vip_resume, #endif }; static int __init sta2x11_vip_init_module(void) { return pci_register_driver(&sta2x11_vip_driver); } static void __exit sta2x11_vip_exit_module(void) { pci_unregister_driver(&sta2x11_vip_driver); } #ifdef MODULE module_init(sta2x11_vip_init_module); module_exit(sta2x11_vip_exit_module); #else late_initcall_sync(sta2x11_vip_init_module); #endif MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); MODULE_AUTHOR("Wind River"); MODULE_LICENSE("GPL v2"); MODULE_SUPPORTED_DEVICE("sta2x11 video input"); MODULE_VERSION(DRV_VERSION); MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl);