/* * This is the driver for the STA2x11 Video Input Port. * * Copyright (C) 2012 ST Microelectronics * author: Federico Vaga * Copyright (C) 2010 WindRiver Systems, Inc. * authors: Andreas Kies * Vlad Lungu * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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_buffer vb; struct list_head list; dma_addr_t dma; }; static inline struct vip_buffer *to_vip_buffer(struct vb2_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 * @alloc_ctx: context for videobuf2 * @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_alloc_ctx *alloc_ctx; 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; /* 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, const struct v4l2_format *fmt, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[]) { struct sta2x11_vip *vip = vb2_get_drv_priv(vq); if (!(*nbuffers) || *nbuffers < MAX_FRAMES) *nbuffers = MAX_FRAMES; *nplanes = 1; sizes[0] = vip->format.sizeimage; alloc_ctxs[0] = vip->alloc_ctx; vip->sequence = 0; vip->active = NULL; vip->tcount = 0; vip->bcount = 0; return 0; }; static int buffer_init(struct vb2_buffer *vb) { struct vip_buffer *vip_buf = to_vip_buffer(vb); 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 sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); struct vip_buffer *vip_buf = to_vip_buffer(vb); 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, 0, size); return 0; } static void buffer_queue(struct vb2_buffer *vb) { struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); struct vip_buffer *vip_buf = to_vip_buffer(vb); 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 int buffer_finish(struct vb2_buffer *vb) { struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); struct vip_buffer *vip_buf = to_vip_buffer(vb); /* Buffer handled, remove it from the list */ spin_lock(&vip->lock); list_del_init(&vip_buf->list); spin_unlock(&vip->lock); vip_active_buf_next(vip); return 0; } 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 int 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_STATE_ERROR); list_del(&vip_buf->list); } spin_unlock(&vip->lock); return 0; } static 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 * * 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 * * 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); 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 * @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 * @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 * @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 * @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 * @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 * @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; f->fmt.pix.priv = 0; return 0; } /** * vidioc_s_fmt_vid_cap - set current video format parameters * @file: descriptor of device * @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 * @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 struct video_device video_dev_template = { .name = KBUILD_MODNAME, .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 * * 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 */ do_gettimeofday(&vip->active->vb.v4l2_buf.timestamp); vip->active->vb.v4l2_buf.sequence = vip->sequence++; vb2_buffer_done(&vip->active->vb, 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; err = vb2_queue_init(&vip->vb_vidq); if (err) return err; INIT_LIST_HEAD(&vip->buffer_list); spin_lock_init(&vip->lock); vip->alloc_ctx = vb2_dma_contig_init_ctx(&vip->pdev->dev); if (IS_ERR(vip->alloc_ctx)) { v4l2_err(&vip->v4l2_dev, "Can't allocate buffer context"); return PTR_ERR(vip->alloc_ctx); } return 0; } static void sta2x11_vip_release_buffer(struct sta2x11_vip *vip) { vb2_dma_contig_cleanup_ctx(vip->alloc_ctx); } 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; 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 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; 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); /* 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; } /* Alloc, initialize and register video device */ vip->video_dev = video_device_alloc(); if (!vip->video_dev) { ret = -ENOMEM; goto release_irq; } vip->video_dev = &video_dev_template; vip->video_dev->v4l2_dev = &vip->v4l2_dev; vip->video_dev->queue = &vip->vb_vidq; set_bit(V4L2_FL_USE_FH_PRIO, &vip->video_dev->flags); 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: 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); release_buf: sta2x11_vip_release_buffer(vip); 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); /*do not call video_device_release() here, is already done */ 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);