diff options
Diffstat (limited to 'drivers/media/pci/sta2x11/sta2x11_vip.c')
| -rw-r--r-- | drivers/media/pci/sta2x11/sta2x11_vip.c | 1343 |
1 files changed, 1343 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 0000000..7005695 --- /dev/null +++ b/drivers/media/pci/sta2x11/sta2x11_vip.c @@ -0,0 +1,1343 @@ +/* + * 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_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; + 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, 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 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 = 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); |