diff options
Diffstat (limited to 'drivers/media/pci/sta2x11/sta2x11_vip.c')
| -rw-r--r-- | drivers/media/pci/sta2x11/sta2x11_vip.c | 1550 |
1 files changed, 1550 insertions, 0 deletions
diff --git a/drivers/media/pci/sta2x11/sta2x11_vip.c b/drivers/media/pci/sta2x11/sta2x11_vip.c new file mode 100644 index 00000000000..4c10205264d --- /dev/null +++ b/drivers/media/pci/sta2x11/sta2x11_vip.c @@ -0,0 +1,1550 @@ +/* + * 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 <andreas.kies@windriver.com> + * Vlad Lungu <vlad.lungu@windriver.com> + * + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/vmalloc.h> + +#include <linux/videodev2.h> + +#include <linux/kmod.h> + +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/io.h> +#include <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <media/v4l2-common.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/videobuf-dma-contig.h> + +#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) { + do_gettimeofday(&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); |