| /* |
| * This is the driver for the STA2x11 Video Input Port. |
| * |
| * Copyright (C) 2012 ST Microelectronics |
| * author: Federico Vaga <federico.vaga@gmail.com> |
| * Copyright (C) 2010 WindRiver Systems, Inc. |
| * authors: Andreas Kies <andreas.kies@windriver.com> |
| * Vlad Lungu <vlad.lungu@windriver.com> |
| * |
| * 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". |
| * |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/videodev2.h> |
| #include <linux/kmod.h> |
| #include <linux/pci.h> |
| #include <linux/interrupt.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-ctrls.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-fh.h> |
| #include <media/v4l2-event.h> |
| #include <media/videobuf2-dma-contig.h> |
| |
| #include "sta2x11_vip.h" |
| |
| #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 SAVE_COUNT 8 |
| #define AUX_COUNT 3 |
| #define IRQ_COUNT 1 |
| |
| |
| struct vip_buffer { |
| struct vb2_v4l2_buffer vb; |
| struct list_head list; |
| dma_addr_t dma; |
| }; |
| static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2) |
| { |
| return container_of(vb2, struct vip_buffer, vb); |
| } |
| |
| /** |
| * 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 |
| * @ctrl_hdl: handler for control framework |
| * @format: pixel format, fixed UYVY |
| * @std: video standard (e.g. PAL/NTSC) |
| * @input: input line for video signal ( 0 or 1 ) |
| * @disabled: Device is in power down state |
| * @slock: for excluse acces of registers |
| * @vb_vidq: queue maintained by videobuf2 layer |
| * @buffer_list: list of buffer in use |
| * @sequence: sequence number of acquired buffer |
| * @active: current active buffer |
| * @lock: used in videobuf2 callback |
| * @tcount: Number of top frames |
| * @bcount: Number of bottom frames |
| * @overflow: Number of FIFO overflows |
| * @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_ctrl_handler ctrl_hdl; |
| |
| |
| struct v4l2_pix_format format; |
| v4l2_std_id std; |
| unsigned int input; |
| int disabled; |
| spinlock_t slock; |
| |
| struct vb2_queue vb_vidq; |
| struct list_head buffer_list; |
| unsigned int sequence; |
| struct vip_buffer *active; /* current active buffer */ |
| spinlock_t lock; /* Used in videobuf2 callback */ |
| |
| /* Interrupt counters */ |
| int tcount, bcount; |
| int overflow; |
| |
| void __iomem *iomem; /* I/O Memory */ |
| 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}, |
| }; |
| |
| /* Write VIP register */ |
| static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) |
| { |
| iowrite32((val), (vip->iomem)+(reg)); |
| } |
| /* Read VIP register */ |
| static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) |
| { |
| return ioread32((vip->iomem)+(reg)); |
| } |
| /* Start DMA acquisition */ |
| static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) |
| { |
| unsigned long offset = 0; |
| |
| if (vip->format.field == V4L2_FIELD_INTERLACED) |
| offset = vip->format.width * 2; |
| |
| spin_lock_irq(&vip->slock); |
| /* Enable acquisition */ |
| reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA); |
| /* Set Top and Bottom Field memory address */ |
| reg_write(vip, DVP_VTP, (u32)vip_buf->dma); |
| reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset); |
| spin_unlock_irq(&vip->slock); |
| } |
| |
| /* Fetch the next buffer to activate */ |
| static void vip_active_buf_next(struct sta2x11_vip *vip) |
| { |
| /* Get the next buffer */ |
| spin_lock(&vip->lock); |
| if (list_empty(&vip->buffer_list)) {/* No available buffer */ |
| spin_unlock(&vip->lock); |
| return; |
| } |
| vip->active = list_first_entry(&vip->buffer_list, |
| struct vip_buffer, |
| list); |
| /* Reset Top and Bottom counter */ |
| vip->tcount = 0; |
| vip->bcount = 0; |
| spin_unlock(&vip->lock); |
| if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */ |
| start_dma(vip, vip->active); /* start dma capture */ |
| } |
| } |
| |
| |
| /* Videobuf2 Operations */ |
| static int queue_setup(struct vb2_queue *vq, |
| unsigned int *nbuffers, unsigned int *nplanes, |
| unsigned int sizes[], struct device *alloc_devs[]) |
| { |
| struct sta2x11_vip *vip = vb2_get_drv_priv(vq); |
| |
| if (!(*nbuffers) || *nbuffers < MAX_FRAMES) |
| *nbuffers = MAX_FRAMES; |
| |
| *nplanes = 1; |
| sizes[0] = vip->format.sizeimage; |
| |
| vip->sequence = 0; |
| vip->active = NULL; |
| vip->tcount = 0; |
| vip->bcount = 0; |
| |
| return 0; |
| }; |
| static int buffer_init(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct vip_buffer *vip_buf = to_vip_buffer(vbuf); |
| |
| vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0); |
| INIT_LIST_HEAD(&vip_buf->list); |
| return 0; |
| } |
| |
| static int buffer_prepare(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); |
| struct vip_buffer *vip_buf = to_vip_buffer(vbuf); |
| unsigned long size; |
| |
| size = vip->format.sizeimage; |
| if (vb2_plane_size(vb, 0) < size) { |
| v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", |
| vb2_plane_size(vb, 0), size); |
| return -EINVAL; |
| } |
| |
| vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size); |
| |
| return 0; |
| } |
| static void buffer_queue(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); |
| struct vip_buffer *vip_buf = to_vip_buffer(vbuf); |
| |
| spin_lock(&vip->lock); |
| list_add_tail(&vip_buf->list, &vip->buffer_list); |
| if (!vip->active) { /* No active buffer, active the first one */ |
| vip->active = list_first_entry(&vip->buffer_list, |
| struct vip_buffer, |
| list); |
| if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */ |
| start_dma(vip, vip_buf); /* start dma capture */ |
| } |
| spin_unlock(&vip->lock); |
| } |
| static void buffer_finish(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); |
| struct vip_buffer *vip_buf = to_vip_buffer(vbuf); |
| |
| /* Buffer handled, remove it from the list */ |
| spin_lock(&vip->lock); |
| list_del_init(&vip_buf->list); |
| spin_unlock(&vip->lock); |
| |
| if (vb2_is_streaming(vb->vb2_queue)) |
| vip_active_buf_next(vip); |
| } |
| |
| static int start_streaming(struct vb2_queue *vq, unsigned int count) |
| { |
| struct sta2x11_vip *vip = vb2_get_drv_priv(vq); |
| |
| spin_lock_irq(&vip->slock); |
| /* Enable interrupt VSYNC Top and Bottom*/ |
| reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); |
| spin_unlock_irq(&vip->slock); |
| |
| if (count) |
| start_dma(vip, vip->active); |
| |
| return 0; |
| } |
| |
| /* abort streaming and wait for last buffer */ |
| static void stop_streaming(struct vb2_queue *vq) |
| { |
| struct sta2x11_vip *vip = vb2_get_drv_priv(vq); |
| struct vip_buffer *vip_buf, *node; |
| |
| /* Disable acquisition */ |
| reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); |
| /* Disable all interrupts */ |
| reg_write(vip, DVP_ITM, 0); |
| |
| /* Release all active buffers */ |
| spin_lock(&vip->lock); |
| list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { |
| vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
| list_del(&vip_buf->list); |
| } |
| spin_unlock(&vip->lock); |
| } |
| |
| static const struct vb2_ops vip_video_qops = { |
| .queue_setup = queue_setup, |
| .buf_init = buffer_init, |
| .buf_prepare = buffer_prepare, |
| .buf_finish = buffer_finish, |
| .buf_queue = buffer_queue, |
| .start_streaming = start_streaming, |
| .stop_streaming = stop_streaming, |
| }; |
| |
| |
| /* File Operations */ |
| static const struct v4l2_file_operations vip_fops = { |
| .owner = THIS_MODULE, |
| .open = v4l2_fh_open, |
| .release = vb2_fop_release, |
| .unlocked_ioctl = video_ioctl2, |
| .read = vb2_fop_read, |
| .mmap = vb2_fop_mmap, |
| .poll = vb2_fop_poll |
| }; |
| |
| |
| /** |
| * vidioc_querycap - return capabilities of device |
| * @file: descriptor of device |
| * @cap: contains return values |
| * @priv: unused |
| * |
| * 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 sta2x11_vip *vip = video_drvdata(file); |
| |
| strcpy(cap->driver, KBUILD_MODNAME); |
| strcpy(cap->card, KBUILD_MODNAME); |
| snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", |
| pci_name(vip->pdev)); |
| cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | |
| V4L2_CAP_STREAMING; |
| cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
| |
| return 0; |
| } |
| |
| /** |
| * vidioc_s_std - set video standard |
| * @file: descriptor of device |
| * @std: contains standard to be set |
| * @priv: unused |
| * |
| * 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 sta2x11_vip *vip = video_drvdata(file); |
| |
| /* |
| * This is here for backwards compatibility only. |
| * The use of V4L2_STD_ALL to trigger a querystd is non-standard. |
| */ |
| if (std == V4L2_STD_ALL) { |
| v4l2_subdev_call(vip->decoder, video, querystd, &std); |
| if (std == V4L2_STD_UNKNOWN) |
| return -EIO; |
| } |
| |
| if (vip->std != std) { |
| vip->std = std; |
| if (V4L2_STD_525_60 & std) |
| vip->format = formats_60[0]; |
| else |
| vip->format = formats_50[0]; |
| } |
| |
| return v4l2_subdev_call(vip->decoder, video, s_std, std); |
| } |
| |
| /** |
| * vidioc_g_std - get video standard |
| * @file: descriptor of device |
| * @priv: unused |
| * @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 sta2x11_vip *vip = video_drvdata(file); |
| |
| *std = vip->std; |
| return 0; |
| } |
| |
| /** |
| * vidioc_querystd - get possible video standards |
| * @file: descriptor of device |
| * @priv: unused |
| * @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 sta2x11_vip *vip = video_drvdata(file); |
| |
| return v4l2_subdev_call(vip->decoder, video, querystd, std); |
| } |
| |
| 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 |
| * @priv: unused |
| * @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 sta2x11_vip *vip = video_drvdata(file); |
| 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 |
| * @priv: unused |
| * @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 sta2x11_vip *vip = video_drvdata(file); |
| |
| *i = vip->input; |
| return 0; |
| } |
| |
| /** |
| * vidioc_enum_fmt_vid_cap - return video capture format |
| * @file: descriptor of device |
| * @priv: unused |
| * @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 |
| * @priv: unused |
| * @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 sta2x11_vip *vip = video_drvdata(file); |
| int interlace_lim; |
| |
| if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { |
| v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); |
| return -EINVAL; |
| } |
| |
| if (V4L2_STD_525_60 & vip->std) |
| interlace_lim = 240; |
| else |
| interlace_lim = 288; |
| |
| switch (f->fmt.pix.field) { |
| default: |
| 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; |
| } |
| |
| /* It is the only supported format */ |
| f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; |
| 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; |
| return 0; |
| } |
| |
| /** |
| * vidioc_s_fmt_vid_cap - set current video format parameters |
| * @file: descriptor of device |
| * @priv: unused |
| * @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 sta2x11_vip *vip = video_drvdata(file); |
| unsigned int t_stop, b_stop, pitch; |
| int ret; |
| |
| ret = vidioc_try_fmt_vid_cap(file, priv, f); |
| if (ret) |
| return ret; |
| |
| if (vb2_is_busy(&vip->vb_vidq)) { |
| /* Can't change format during acquisition */ |
| v4l2_err(&vip->v4l2_dev, "device busy\n"); |
| return -EBUSY; |
| } |
| vip->format = f->fmt.pix; |
| switch (vip->format.field) { |
| case V4L2_FIELD_INTERLACED: |
| t_stop = ((vip->format.height / 2 - 1) << 16) | |
| (2 * vip->format.width - 1); |
| b_stop = t_stop; |
| pitch = 4 * vip->format.width; |
| break; |
| case V4L2_FIELD_TOP: |
| t_stop = ((vip->format.height - 1) << 16) | |
| (2 * vip->format.width - 1); |
| b_stop = (0 << 16) | (2 * vip->format.width - 1); |
| pitch = 2 * vip->format.width; |
| break; |
| case V4L2_FIELD_BOTTOM: |
| t_stop = (0 << 16) | (2 * vip->format.width - 1); |
| b_stop = (vip->format.height << 16) | |
| (2 * vip->format.width - 1); |
| pitch = 2 * vip->format.width; |
| break; |
| default: |
| v4l2_err(&vip->v4l2_dev, "unknown field format\n"); |
| return -EINVAL; |
| } |
| |
| spin_lock_irq(&vip->slock); |
| /* Y-X Top Field Offset */ |
| reg_write(vip, DVP_TFO, 0); |
| /* Y-X Bottom Field Offset */ |
| reg_write(vip, DVP_BFO, 0); |
| /* Y-X Top Field Stop*/ |
| reg_write(vip, DVP_TFS, t_stop); |
| /* Y-X Bottom Field Stop */ |
| reg_write(vip, DVP_BFS, b_stop); |
| /* Video Memory Pitch */ |
| reg_write(vip, DVP_VMP, pitch); |
| spin_unlock_irq(&vip->slock); |
| |
| return 0; |
| } |
| |
| /** |
| * vidioc_g_fmt_vid_cap - get current video format parameters |
| * @file: descriptor of device |
| * @priv: unused |
| * @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 sta2x11_vip *vip = video_drvdata(file); |
| |
| f->fmt.pix = vip->format; |
| |
| return 0; |
| } |
| |
| static const struct v4l2_ioctl_ops vip_ioctl_ops = { |
| .vidioc_querycap = vidioc_querycap, |
| /* FMT handling */ |
| .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
| .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
| .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
| .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
| /* Buffer handlers */ |
| .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| .vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
| .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| .vidioc_querybuf = vb2_ioctl_querybuf, |
| .vidioc_qbuf = vb2_ioctl_qbuf, |
| .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| /* Stream on/off */ |
| .vidioc_streamon = vb2_ioctl_streamon, |
| .vidioc_streamoff = vb2_ioctl_streamoff, |
| /* Standard handling */ |
| .vidioc_g_std = vidioc_g_std, |
| .vidioc_s_std = vidioc_s_std, |
| .vidioc_querystd = vidioc_querystd, |
| /* Input handling */ |
| .vidioc_enum_input = vidioc_enum_input, |
| .vidioc_g_input = vidioc_g_input, |
| .vidioc_s_input = vidioc_s_input, |
| /* Log status ioctl */ |
| .vidioc_log_status = v4l2_ctrl_log_status, |
| /* Event handling */ |
| .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| }; |
| |
| static const struct video_device video_dev_template = { |
| .name = KBUILD_MODNAME, |
| .release = video_device_release_empty, |
| .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 |
| * |
| * 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) |
| { |
| unsigned int status; |
| |
| status = reg_read(vip, DVP_ITS); |
| |
| if (!status) /* No interrupt to handle */ |
| return IRQ_NONE; |
| |
| if (status & DVP_IT_FIFO) |
| if (vip->overflow++ > 5) |
| pr_info("VIP: fifo overflow\n"); |
| |
| if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { |
| /* this is bad, we are too slow, hope the condition is gone |
| * on the next frame */ |
| return IRQ_HANDLED; |
| } |
| |
| if (status & DVP_IT_VST) |
| if ((++vip->tcount) < 2) |
| return IRQ_HANDLED; |
| if (status & DVP_IT_VSB) { |
| vip->bcount++; |
| return IRQ_HANDLED; |
| } |
| |
| if (vip->active) { /* Acquisition is over on this buffer */ |
| /* Disable acquisition */ |
| reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); |
| /* Remove the active buffer from the list */ |
| vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); |
| vip->active->vb.sequence = vip->sequence++; |
| vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void sta2x11_vip_init_register(struct sta2x11_vip *vip) |
| { |
| /* Register initialization */ |
| spin_lock_irq(&vip->slock); |
| /* Clean interrupt */ |
| reg_read(vip, DVP_ITS); |
| /* Enable Half Line per vertical */ |
| reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); |
| /* Reset VIP control */ |
| reg_write(vip, DVP_CTL, DVP_CTL_RST); |
| /* Clear VIP control */ |
| reg_write(vip, DVP_CTL, 0); |
| spin_unlock_irq(&vip->slock); |
| } |
| static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) |
| { |
| spin_lock_irq(&vip->slock); |
| /* Disable interrupt */ |
| reg_write(vip, DVP_ITM, 0); |
| /* Reset VIP Control */ |
| reg_write(vip, DVP_CTL, DVP_CTL_RST); |
| /* Clear VIP Control */ |
| reg_write(vip, DVP_CTL, 0); |
| /* Clean VIP Interrupt */ |
| reg_read(vip, DVP_ITS); |
| spin_unlock_irq(&vip->slock); |
| } |
| static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) |
| { |
| int err; |
| |
| err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); |
| if (err) { |
| v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); |
| return err; |
| } |
| memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); |
| vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; |
| vip->vb_vidq.drv_priv = vip; |
| vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); |
| vip->vb_vidq.ops = &vip_video_qops; |
| vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; |
| vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| vip->vb_vidq.dev = &vip->pdev->dev; |
| err = vb2_queue_init(&vip->vb_vidq); |
| if (err) |
| return err; |
| INIT_LIST_HEAD(&vip->buffer_list); |
| spin_lock_init(&vip->lock); |
| return 0; |
| } |
| |
| static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) |
| { |
| /* |
| * Inititialize an empty control so VIP can inerithing controls |
| * from ADV7180 |
| */ |
| v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); |
| |
| vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; |
| if (vip->ctrl_hdl.error) { |
| int err = vip->ctrl_hdl.error; |
| |
| v4l2_ctrl_handler_free(&vip->ctrl_hdl); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * 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 = -ENODEV; |
| |
| if (!gpio_is_valid(pin)) |
| return ret; |
| |
| 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 (gpio_is_valid(pin)) { |
| 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 sta2x11_vip_init_one(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| int ret; |
| struct sta2x11_vip *vip; |
| struct vip_config *config; |
| |
| /* Check if hardware support 26-bit DMA */ |
| if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { |
| dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); |
| return -EINVAL; |
| } |
| /* Enable PCI */ |
| ret = pci_enable_device(pdev); |
| if (ret) |
| return ret; |
| |
| /* Get VIP platform data */ |
| config = dev_get_platdata(&pdev->dev); |
| if (!config) { |
| dev_info(&pdev->dev, "VIP slot disabled\n"); |
| ret = -EINVAL; |
| goto disable; |
| } |
| |
| /* Power configuration */ |
| ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, |
| config->pwr_name); |
| if (ret) |
| goto disable; |
| |
| 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 (gpio_is_valid(config->pwr_pin)) { |
| /* Datasheet says 5ms between PWR and RST */ |
| usleep_range(5000, 25000); |
| gpio_direction_output(config->pwr_pin, 1); |
| } |
| |
| if (gpio_is_valid(config->reset_pin)) { |
| /* Datasheet says 5ms between PWR and RST */ |
| usleep_range(5000, 25000); |
| gpio_direction_output(config->reset_pin, 1); |
| } |
| usleep_range(5000, 25000); |
| |
| /* Allocate a new VIP instance */ |
| 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; |
| |
| ret = sta2x11_vip_init_controls(vip); |
| if (ret) |
| goto free_mem; |
| ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); |
| if (ret) |
| 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, KBUILD_MODNAME); |
| if (ret) |
| goto unreg; |
| |
| vip->iomem = pci_iomap(pdev, 0, 0x100); |
| if (!vip->iomem) { |
| ret = -ENOMEM; |
| goto release; |
| } |
| |
| pci_enable_msi(pdev); |
| |
| /* Initialize buffer */ |
| ret = sta2x11_vip_init_buffer(vip); |
| if (ret) |
| goto unmap; |
| |
| spin_lock_init(&vip->slock); |
| |
| ret = request_irq(pdev->irq, |
| (irq_handler_t) vip_irq, |
| IRQF_SHARED, KBUILD_MODNAME, vip); |
| if (ret) { |
| dev_err(&pdev->dev, "request_irq failed\n"); |
| ret = -ENODEV; |
| goto release_buf; |
| } |
| |
| /* Initialize and register video device */ |
| vip->video_dev = video_dev_template; |
| vip->video_dev.v4l2_dev = &vip->v4l2_dev; |
| vip->video_dev.queue = &vip->vb_vidq; |
| video_set_drvdata(&vip->video_dev, vip); |
| |
| ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1); |
| if (ret) |
| goto vrelease; |
| |
| /* Get ADV7180 subdevice */ |
| 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); |
| |
| sta2x11_vip_init_register(vip); |
| |
| dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); |
| return 0; |
| |
| vunreg: |
| video_set_drvdata(&vip->video_dev, NULL); |
| vrelease: |
| video_unregister_device(&vip->video_dev); |
| free_irq(pdev->irq, vip); |
| release_buf: |
| pci_disable_msi(pdev); |
| unmap: |
| vb2_queue_release(&vip->vb_vidq); |
| pci_iounmap(pdev, vip->iomem); |
| 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 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); |
| |
| sta2x11_vip_clear_register(vip); |
| |
| video_set_drvdata(&vip->video_dev, NULL); |
| video_unregister_device(&vip->video_dev); |
| free_irq(pdev->irq, vip); |
| pci_disable_msi(pdev); |
| vb2_queue_release(&vip->vb_vidq); |
| pci_iounmap(pdev, vip->iomem); |
| pci_release_regions(pdev); |
| |
| v4l2_device_unregister(&vip->v4l2_dev); |
| |
| 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) |
| */ |
| 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_warn("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_warn("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 const struct pci_device_id sta2x11_vip_pci_tbl[] = { |
| {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, |
| {0,} |
| }; |
| |
| static struct pci_driver sta2x11_vip_driver = { |
| .name = KBUILD_MODNAME, |
| .probe = sta2x11_vip_init_one, |
| .remove = 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); |