diff options
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-video.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-video.c | 2926 |
1 files changed, 2926 insertions, 0 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c new file mode 100644 index 000000000..25e0620de --- /dev/null +++ b/drivers/media/usb/em28xx/em28xx-video.c @@ -0,0 +1,2926 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB +// video capture devices +// +// Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> +// Markus Rechberger <mrechberger@gmail.com> +// Mauro Carvalho Chehab <mchehab@kernel.org> +// Sascha Sommer <saschasommer@freenet.de> +// Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com> +// +// Some parts based on SN9C10x PC Camera Controllers GPL driver made +// by Luca Risolia <luca.risolia@studio.unibo.it> + +#include "em28xx.h" + +#include <linux/init.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/bitmap.h> +#include <linux/usb.h> +#include <linux/i2c.h> +#include <linux/mm.h> +#include <linux/mutex.h> +#include <linux/slab.h> + +#include "em28xx-v4l.h" +#include <media/v4l2-common.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-event.h> +#include <media/drv-intf/msp3400.h> +#include <media/tuner.h> + +#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ + "Markus Rechberger <mrechberger@gmail.com>, " \ + "Mauro Carvalho Chehab <mchehab@kernel.org>, " \ + "Sascha Sommer <saschasommer@freenet.de>" + +static unsigned int isoc_debug; +module_param(isoc_debug, int, 0644); +MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); + +static unsigned int disable_vbi; +module_param(disable_vbi, int, 0644); +MODULE_PARM_DESC(disable_vbi, "disable vbi support"); + +static int alt; +module_param(alt, int, 0644); +MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); + +#define em28xx_videodbg(fmt, arg...) do { \ + if (video_debug) \ + dev_printk(KERN_DEBUG, &dev->intf->dev, \ + "video: %s: " fmt, __func__, ## arg); \ +} while (0) + +#define em28xx_isocdbg(fmt, arg...) do {\ + if (isoc_debug) \ + dev_printk(KERN_DEBUG, &dev->intf->dev, \ + "isoc: %s: " fmt, __func__, ## arg); \ +} while (0) + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(EM28XX_VERSION); + +#define EM25XX_FRMDATAHDR_BYTE1 0x02 +#define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20 +#define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02 +#define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01 +#define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \ + EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \ + EM25XX_FRMDATAHDR_BYTE2_FRAME_ID) + +static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; +static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; +static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; + +module_param_array(video_nr, int, NULL, 0444); +module_param_array(vbi_nr, int, NULL, 0444); +module_param_array(radio_nr, int, NULL, 0444); +MODULE_PARM_DESC(video_nr, "video device numbers"); +MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); +MODULE_PARM_DESC(radio_nr, "radio device numbers"); + +static unsigned int video_debug; +module_param(video_debug, int, 0644); +MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); + +/* supported video standards */ +static struct em28xx_fmt format[] = { + { + .fourcc = V4L2_PIX_FMT_YUYV, + .depth = 16, + .reg = EM28XX_OUTFMT_YUV422_Y0UY1V, + }, { + .fourcc = V4L2_PIX_FMT_RGB565, + .depth = 16, + .reg = EM28XX_OUTFMT_RGB_16_656, + }, { + .fourcc = V4L2_PIX_FMT_SRGGB8, + .depth = 8, + .reg = EM28XX_OUTFMT_RGB_8_RGRG, + }, { + .fourcc = V4L2_PIX_FMT_SBGGR8, + .depth = 8, + .reg = EM28XX_OUTFMT_RGB_8_BGBG, + }, { + .fourcc = V4L2_PIX_FMT_SGRBG8, + .depth = 8, + .reg = EM28XX_OUTFMT_RGB_8_GRGR, + }, { + .fourcc = V4L2_PIX_FMT_SGBRG8, + .depth = 8, + .reg = EM28XX_OUTFMT_RGB_8_GBGB, + }, { + .fourcc = V4L2_PIX_FMT_YUV411P, + .depth = 12, + .reg = EM28XX_OUTFMT_YUV411, + }, +}; + +/*FIXME: maxw should be dependent of alt mode */ +static inline unsigned int norm_maxw(struct em28xx *dev) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + if (dev->is_webcam) + return v4l2->sensor_xres; + + if (dev->board.max_range_640_480) + return 640; + + return 720; +} + +static inline unsigned int norm_maxh(struct em28xx *dev) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + if (dev->is_webcam) + return v4l2->sensor_yres; + + if (dev->board.max_range_640_480) + return 480; + + return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480; +} + +static int em28xx_vbi_supported(struct em28xx *dev) +{ + /* Modprobe option to manually disable */ + if (disable_vbi == 1) + return 0; + + if (dev->is_webcam) + return 0; + + /* FIXME: check subdevices for VBI support */ + + if (dev->chip_id == CHIP_ID_EM2860 || + dev->chip_id == CHIP_ID_EM2883) + return 1; + + /* Version of em28xx that does not support VBI */ + return 0; +} + +/* + * em28xx_wake_i2c() + * configure i2c attached devices + */ +static void em28xx_wake_i2c(struct em28xx *dev) +{ + struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; + + v4l2_device_call_all(v4l2_dev, 0, core, reset, 0); + v4l2_device_call_all(v4l2_dev, 0, video, s_routing, + INPUT(dev->ctl_input)->vmux, 0, 0); +} + +static int em28xx_colorlevels_set_default(struct em28xx *dev) +{ + em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT); + em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT); + em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT); + em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT); + em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT); + em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT); + + em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20); + em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20); + em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20); + em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20); + em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00); + em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00); + return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00); +} + +static int em28xx_set_outfmt(struct em28xx *dev) +{ + int ret; + u8 fmt, vinctrl; + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + fmt = v4l2->format->reg; + if (!dev->is_em25xx) + fmt |= 0x20; + /* + * NOTE: it's not clear if this is really needed ! + * The datasheets say bit 5 is a reserved bit and devices seem to work + * fine without it. But the Windows driver sets it for em2710/50+em28xx + * devices and we've always been setting it, too. + * + * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set, + * it's likely used for an additional (compressed ?) format there. + */ + ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt); + if (ret < 0) + return ret; + + ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode); + if (ret < 0) + return ret; + + vinctrl = v4l2->vinctl; + if (em28xx_vbi_supported(dev) == 1) { + vinctrl |= EM28XX_VINCTRL_VBI_RAW; + em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00); + em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, + v4l2->vbi_width / 4); + em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height); + if (v4l2->norm & V4L2_STD_525_60) { + /* NTSC */ + em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09); + } else if (v4l2->norm & V4L2_STD_625_50) { + /* PAL */ + em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07); + } + } + + return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl); +} + +static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, + u8 ymin, u8 ymax) +{ + em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n", + xmin, ymin, xmax, ymax); + + em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1); + em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1); + em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1); + return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1); +} + +static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, + u16 width, u16 height) +{ + u8 cwidth = width >> 2; + u8 cheight = height >> 2; + u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01); + /* NOTE: size limit: 2047x1023 = 2MPix */ + + em28xx_videodbg("capture area set to (%d,%d): %dx%d\n", + hstart, vstart, + ((overflow & 2) << 9 | cwidth << 2), + ((overflow & 1) << 10 | cheight << 2)); + + em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1); + em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1); + em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1); + em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1); + em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1); + + /* FIXME: function/meaning of these registers ? */ + /* FIXME: align width+height to multiples of 4 ?! */ + if (dev->is_em25xx) { + em28xx_write_reg(dev, 0x34, width >> 4); + em28xx_write_reg(dev, 0x35, height >> 4); + } +} + +static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) +{ + u8 mode = 0x00; + /* the em2800 scaler only supports scaling down to 50% */ + + if (dev->board.is_em2800) { + mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); + } else { + u8 buf[2]; + + buf[0] = h; + buf[1] = h >> 8; + em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2); + + buf[0] = v; + buf[1] = v >> 8; + em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2); + /* + * it seems that both H and V scalers must be active + * to work correctly + */ + mode = (h || v) ? 0x30 : 0x00; + } + return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode); +} + +/* FIXME: this only function read values from dev */ +static int em28xx_resolution_set(struct em28xx *dev) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + int width = norm_maxw(dev); + int height = norm_maxh(dev); + + /* Properly setup VBI */ + v4l2->vbi_width = 720; + if (v4l2->norm & V4L2_STD_525_60) + v4l2->vbi_height = 12; + else + v4l2->vbi_height = 18; + + em28xx_set_outfmt(dev); + + em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); + + /* + * If we don't set the start position to 2 in VBI mode, we end up + * with line 20/21 being YUYV encoded instead of being in 8-bit + * greyscale. The core of the issue is that line 21 (and line 23 for + * PAL WSS) are inside of active video region, and as a result they + * get the pixelformatting associated with that area. So by cropping + * it out, we end up with the same format as the rest of the VBI + * region + */ + if (em28xx_vbi_supported(dev) == 1) + em28xx_capture_area_set(dev, 0, 2, width, height); + else + em28xx_capture_area_set(dev, 0, 0, width, height); + + return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale); +} + +/* Set USB alternate setting for analog video */ +static int em28xx_set_alternate(struct em28xx *dev) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct usb_device *udev = interface_to_usbdev(dev->intf); + int err; + int i; + unsigned int min_pkt_size = v4l2->width * 2 + 4; + + /* + * NOTE: for isoc transfers, only alt settings > 0 are allowed + * bulk transfers seem to work only with alt=0 ! + */ + dev->alt = 0; + if (alt > 0 && alt < dev->num_alt) { + em28xx_videodbg("alternate forced to %d\n", dev->alt); + dev->alt = alt; + goto set_alt; + } + if (dev->analog_xfer_bulk) + goto set_alt; + + /* + * When image size is bigger than a certain value, + * the frame size should be increased, otherwise, only + * green screen will be received. + */ + if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2) + min_pkt_size *= 2; + + for (i = 0; i < dev->num_alt; i++) { + /* stop when the selected alt setting offers enough bandwidth */ + if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) { + dev->alt = i; + break; + /* + * otherwise make sure that we end up with the maximum + * bandwidth because the min_pkt_size equation might be wrong. + * + */ + } else if (dev->alt_max_pkt_size_isoc[i] > + dev->alt_max_pkt_size_isoc[dev->alt]) + dev->alt = i; + } + +set_alt: + /* + * NOTE: for bulk transfers, we need to call usb_set_interface() + * even if the previous settings were the same. Otherwise streaming + * fails with all urbs having status = -EOVERFLOW ! + */ + if (dev->analog_xfer_bulk) { + dev->max_pkt_size = 512; /* USB 2.0 spec */ + dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER; + } else { /* isoc */ + em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n", + min_pkt_size, dev->alt); + dev->max_pkt_size = + dev->alt_max_pkt_size_isoc[dev->alt]; + dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS; + } + em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n", + dev->alt, dev->max_pkt_size); + err = usb_set_interface(udev, dev->ifnum, dev->alt); + if (err < 0) { + dev_err(&dev->intf->dev, + "cannot change alternate number to %d (error=%i)\n", + dev->alt, err); + return err; + } + return 0; +} + +/* + * DMA and thread functions + */ + +/* + * Finish the current buffer + */ +static inline void finish_buffer(struct em28xx *dev, + struct em28xx_buffer *buf) +{ + em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field); + + buf->vb.sequence = dev->v4l2->field_count++; + if (dev->v4l2->progressive) + buf->vb.field = V4L2_FIELD_NONE; + else + buf->vb.field = V4L2_FIELD_INTERLACED; + buf->vb.vb2_buf.timestamp = ktime_get_ns(); + + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); +} + +/* + * Copy picture data from USB buffer to video buffer + */ +static void em28xx_copy_video(struct em28xx *dev, + struct em28xx_buffer *buf, + unsigned char *usb_buf, + unsigned long len) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + void *fieldstart, *startwrite, *startread; + int linesdone, currlinedone, offset, lencopy, remain; + int bytesperline = v4l2->width << 1; + + if (buf->pos + len > buf->length) + len = buf->length - buf->pos; + + startread = usb_buf; + remain = len; + + if (v4l2->progressive || buf->top_field) + fieldstart = buf->vb_buf; + else /* interlaced mode, even nr. of lines */ + fieldstart = buf->vb_buf + bytesperline; + + linesdone = buf->pos / bytesperline; + currlinedone = buf->pos % bytesperline; + + if (v4l2->progressive) + offset = linesdone * bytesperline + currlinedone; + else + offset = linesdone * bytesperline * 2 + currlinedone; + + startwrite = fieldstart + offset; + lencopy = bytesperline - currlinedone; + lencopy = lencopy > remain ? remain : lencopy; + + if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) { + em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n", + ((char *)startwrite + lencopy) - + ((char *)buf->vb_buf + buf->length)); + remain = (char *)buf->vb_buf + buf->length - + (char *)startwrite; + lencopy = remain; + } + if (lencopy <= 0) + return; + memcpy(startwrite, startread, lencopy); + + remain -= lencopy; + + while (remain > 0) { + if (v4l2->progressive) + startwrite += lencopy; + else + startwrite += lencopy + bytesperline; + startread += lencopy; + if (bytesperline > remain) + lencopy = remain; + else + lencopy = bytesperline; + + if ((char *)startwrite + lencopy > (char *)buf->vb_buf + + buf->length) { + em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n", + ((char *)startwrite + lencopy) - + ((char *)buf->vb_buf + buf->length)); + remain = (char *)buf->vb_buf + buf->length - + (char *)startwrite; + lencopy = remain; + } + if (lencopy <= 0) + break; + + memcpy(startwrite, startread, lencopy); + + remain -= lencopy; + } + + buf->pos += len; +} + +/* + * Copy VBI data from USB buffer to video buffer + */ +static void em28xx_copy_vbi(struct em28xx *dev, + struct em28xx_buffer *buf, + unsigned char *usb_buf, + unsigned long len) +{ + unsigned int offset; + + if (buf->pos + len > buf->length) + len = buf->length - buf->pos; + + offset = buf->pos; + /* Make sure the bottom field populates the second half of the frame */ + if (buf->top_field == 0) + offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height; + + memcpy(buf->vb_buf + offset, usb_buf, len); + buf->pos += len; +} + +static inline void print_err_status(struct em28xx *dev, + int packet, int status) +{ + char *errmsg = "Unknown"; + + switch (status) { + case -ENOENT: + errmsg = "unlinked synchronously"; + break; + case -ECONNRESET: + errmsg = "unlinked asynchronously"; + break; + case -ENOSR: + errmsg = "Buffer error (overrun)"; + break; + case -EPIPE: + errmsg = "Stalled (device not responding)"; + break; + case -EOVERFLOW: + errmsg = "Babble (bad cable?)"; + break; + case -EPROTO: + errmsg = "Bit-stuff error (bad cable?)"; + break; + case -EILSEQ: + errmsg = "CRC/Timeout (could be anything)"; + break; + case -ETIME: + errmsg = "Device does not respond"; + break; + } + if (packet < 0) { + em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); + } else { + em28xx_isocdbg("URB packet %d, status %d [%s].\n", + packet, status, errmsg); + } +} + +/* + * get the next available buffer from dma queue + */ +static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev, + struct em28xx_dmaqueue *dma_q) +{ + struct em28xx_buffer *buf; + + if (list_empty(&dma_q->active)) { + em28xx_isocdbg("No active queue to serve\n"); + return NULL; + } + + /* Get the next buffer */ + buf = list_entry(dma_q->active.next, struct em28xx_buffer, list); + /* Cleans up buffer - Useful for testing for frame/URB loss */ + list_del(&buf->list); + buf->pos = 0; + buf->vb_buf = buf->mem; + + return buf; +} + +/* + * Finish the current buffer if completed and prepare for the next field + */ +static struct em28xx_buffer * +finish_field_prepare_next(struct em28xx *dev, + struct em28xx_buffer *buf, + struct em28xx_dmaqueue *dma_q) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */ + if (buf) + finish_buffer(dev, buf); + buf = get_next_buf(dev, dma_q); + } + if (buf) { + buf->top_field = v4l2->top_field; + buf->pos = 0; + } + + return buf; +} + +/* + * Process data packet according to the em2710/em2750/em28xx frame data format + */ +static inline void process_frame_data_em28xx(struct em28xx *dev, + unsigned char *data_pkt, + unsigned int data_len) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; + struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf; + struct em28xx_dmaqueue *dma_q = &dev->vidq; + struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; + + /* + * capture type 0 = vbi start + * capture type 1 = vbi in progress + * capture type 2 = video start + * capture type 3 = video in progress + */ + if (data_len >= 4) { + /* + * NOTE: Headers are always 4 bytes and + * never split across packets + */ + if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 && + data_pkt[2] == 0x88 && data_pkt[3] == 0x88) { + /* Continuation */ + data_pkt += 4; + data_len -= 4; + } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) { + /* Field start (VBI mode) */ + v4l2->capture_type = 0; + v4l2->vbi_read = 0; + em28xx_isocdbg("VBI START HEADER !!!\n"); + v4l2->top_field = !(data_pkt[2] & 1); + data_pkt += 4; + data_len -= 4; + } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) { + /* Field start (VBI disabled) */ + v4l2->capture_type = 2; + em28xx_isocdbg("VIDEO START HEADER !!!\n"); + v4l2->top_field = !(data_pkt[2] & 1); + data_pkt += 4; + data_len -= 4; + } + } + /* + * NOTE: With bulk transfers, intermediate data packets + * have no continuation header + */ + + if (v4l2->capture_type == 0) { + vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q); + dev->usb_ctl.vbi_buf = vbi_buf; + v4l2->capture_type = 1; + } + + if (v4l2->capture_type == 1) { + int vbi_size = v4l2->vbi_width * v4l2->vbi_height; + int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ? + (vbi_size - v4l2->vbi_read) : data_len; + + /* Copy VBI data */ + if (vbi_buf) + em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len); + v4l2->vbi_read += vbi_data_len; + + if (vbi_data_len < data_len) { + /* Continue with copying video data */ + v4l2->capture_type = 2; + data_pkt += vbi_data_len; + data_len -= vbi_data_len; + } + } + + if (v4l2->capture_type == 2) { + buf = finish_field_prepare_next(dev, buf, dma_q); + dev->usb_ctl.vid_buf = buf; + v4l2->capture_type = 3; + } + + if (v4l2->capture_type == 3 && buf && data_len > 0) + em28xx_copy_video(dev, buf, data_pkt, data_len); +} + +/* + * Process data packet according to the em25xx/em276x/7x/8x frame data format + */ +static inline void process_frame_data_em25xx(struct em28xx *dev, + unsigned char *data_pkt, + unsigned int data_len) +{ + struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; + struct em28xx_dmaqueue *dmaq = &dev->vidq; + struct em28xx_v4l2 *v4l2 = dev->v4l2; + bool frame_end = false; + + /* Check for header */ + /* + * NOTE: at least with bulk transfers, only the first packet + * has a header and has always set the FRAME_END bit + */ + if (data_len >= 2) { /* em25xx header is only 2 bytes long */ + if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) && + ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) { + v4l2->top_field = !(data_pkt[1] & + EM25XX_FRMDATAHDR_BYTE2_FRAME_ID); + frame_end = data_pkt[1] & + EM25XX_FRMDATAHDR_BYTE2_FRAME_END; + data_pkt += 2; + data_len -= 2; + } + + /* Finish field and prepare next (BULK only) */ + if (dev->analog_xfer_bulk && frame_end) { + buf = finish_field_prepare_next(dev, buf, dmaq); + dev->usb_ctl.vid_buf = buf; + } + /* + * NOTE: in ISOC mode when a new frame starts and buf==NULL, + * we COULD already prepare a buffer here to avoid skipping the + * first frame. + */ + } + + /* Copy data */ + if (buf && data_len > 0) + em28xx_copy_video(dev, buf, data_pkt, data_len); + + /* Finish frame (ISOC only) => avoids lag of 1 frame */ + if (!dev->analog_xfer_bulk && frame_end) { + buf = finish_field_prepare_next(dev, buf, dmaq); + dev->usb_ctl.vid_buf = buf; + } + + /* + * NOTES: + * + * 1) Tested with USB bulk transfers only ! + * The wording in the datasheet suggests that isoc might work different. + * The current code assumes that with isoc transfers each packet has a + * header like with the other em28xx devices. + * + * 2) Support for interlaced mode is pure theory. It has not been + * tested and it is unknown if these devices actually support it. + */ +} + +/* Processes and copies the URB data content (video and VBI data) */ +static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb) +{ + int xfer_bulk, num_packets, i; + unsigned char *usb_data_pkt; + unsigned int usb_data_len; + + if (!dev) + return 0; + + if (dev->disconnected) + return 0; + + if (urb->status < 0) + print_err_status(dev, -1, urb->status); + + xfer_bulk = usb_pipebulk(urb->pipe); + + if (xfer_bulk) /* bulk */ + num_packets = 1; + else /* isoc */ + num_packets = urb->number_of_packets; + + for (i = 0; i < num_packets; i++) { + if (xfer_bulk) { /* bulk */ + usb_data_len = urb->actual_length; + + usb_data_pkt = urb->transfer_buffer; + } else { /* isoc */ + if (urb->iso_frame_desc[i].status < 0) { + print_err_status(dev, i, + urb->iso_frame_desc[i].status); + if (urb->iso_frame_desc[i].status != -EPROTO) + continue; + } + + usb_data_len = urb->iso_frame_desc[i].actual_length; + if (usb_data_len > dev->max_pkt_size) { + em28xx_isocdbg("packet bigger than packet size"); + continue; + } + + usb_data_pkt = urb->transfer_buffer + + urb->iso_frame_desc[i].offset; + } + + if (usb_data_len == 0) { + /* NOTE: happens very often with isoc transfers */ + /* em28xx_usbdbg("packet %d is empty",i); - spammy */ + continue; + } + + if (dev->is_em25xx) + process_frame_data_em25xx(dev, + usb_data_pkt, usb_data_len); + else + process_frame_data_em28xx(dev, + usb_data_pkt, usb_data_len); + } + return 1; +} + +static int get_resource(enum v4l2_buf_type f_type) +{ + switch (f_type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + return EM28XX_RESOURCE_VIDEO; + case V4L2_BUF_TYPE_VBI_CAPTURE: + return EM28XX_RESOURCE_VBI; + default: + WARN_ON(1); + return -1; /* Indicate that device is busy */ + } +} + +/* Usage lock check functions */ +static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type) +{ + int res_type = get_resource(f_type); + + /* is it free? */ + if (dev->resources & res_type) { + /* no, someone else uses it */ + return -EBUSY; + } + + /* it's free, grab it */ + dev->resources |= res_type; + em28xx_videodbg("res: get %d\n", res_type); + return 0; +} + +static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type) +{ + int res_type = get_resource(f_type); + + dev->resources &= ~res_type; + em28xx_videodbg("res: put %d\n", res_type); +} + +static void em28xx_v4l2_media_release(struct em28xx *dev) +{ +#ifdef CONFIG_MEDIA_CONTROLLER + int i; + + for (i = 0; i < MAX_EM28XX_INPUT; i++) { + if (!INPUT(i)->type) + return; + media_device_unregister_entity(&dev->input_ent[i]); + } +#endif +} + +/* + * Media Controller helper functions + */ + +static int em28xx_enable_analog_tuner(struct em28xx *dev) +{ +#ifdef CONFIG_MEDIA_CONTROLLER + struct media_device *mdev = dev->media_dev; + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct media_entity *source; + struct media_link *link, *found_link = NULL; + int ret, active_links = 0; + + if (!mdev || !v4l2->decoder) + return 0; + + /* + * This will find the tuner that is connected into the decoder. + * Technically, this is not 100% correct, as the device may be + * using an analog input instead of the tuner. However, as we can't + * do DVB streaming while the DMA engine is being used for V4L2, + * this should be enough for the actual needs. + */ + list_for_each_entry(link, &v4l2->decoder->links, list) { + if (link->sink->entity == v4l2->decoder) { + found_link = link; + if (link->flags & MEDIA_LNK_FL_ENABLED) + active_links++; + break; + } + } + + if (active_links == 1 || !found_link) + return 0; + + source = found_link->source->entity; + list_for_each_entry(link, &source->links, list) { + struct media_entity *sink; + int flags = 0; + + sink = link->sink->entity; + + if (sink == v4l2->decoder) + flags = MEDIA_LNK_FL_ENABLED; + + ret = media_entity_setup_link(link, flags); + if (ret) { + dev_err(&dev->intf->dev, + "Couldn't change link %s->%s to %s. Error %d\n", + source->name, sink->name, + flags ? "enabled" : "disabled", + ret); + return ret; + } + + em28xx_videodbg("link %s->%s was %s\n", + source->name, sink->name, + flags ? "ENABLED" : "disabled"); + } +#endif + return 0; +} + +static const char * const iname[] = { + [EM28XX_VMUX_COMPOSITE] = "Composite", + [EM28XX_VMUX_SVIDEO] = "S-Video", + [EM28XX_VMUX_TELEVISION] = "Television", + [EM28XX_RADIO] = "Radio", +}; + +static void em28xx_v4l2_create_entities(struct em28xx *dev) +{ +#if defined(CONFIG_MEDIA_CONTROLLER) + struct em28xx_v4l2 *v4l2 = dev->v4l2; + int ret, i; + + /* Initialize Video, VBI and Radio pads */ + v4l2->video_pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad); + if (ret < 0) + dev_err(&dev->intf->dev, + "failed to initialize video media entity!\n"); + + if (em28xx_vbi_supported(dev)) { + v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1, + &v4l2->vbi_pad); + if (ret < 0) + dev_err(&dev->intf->dev, + "failed to initialize vbi media entity!\n"); + } + + /* Webcams don't have input connectors */ + if (dev->is_webcam) + return; + + /* Create entities for each input connector */ + for (i = 0; i < MAX_EM28XX_INPUT; i++) { + struct media_entity *ent = &dev->input_ent[i]; + + if (!INPUT(i)->type) + break; + + ent->name = iname[INPUT(i)->type]; + ent->flags = MEDIA_ENT_FL_CONNECTOR; + dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE; + + switch (INPUT(i)->type) { + case EM28XX_VMUX_COMPOSITE: + ent->function = MEDIA_ENT_F_CONN_COMPOSITE; + break; + case EM28XX_VMUX_SVIDEO: + ent->function = MEDIA_ENT_F_CONN_SVIDEO; + break; + default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */ + if (dev->tuner_type != TUNER_ABSENT) + ent->function = MEDIA_ENT_F_CONN_RF; + break; + } + + ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]); + if (ret < 0) + dev_err(&dev->intf->dev, + "failed to initialize input pad[%d]!\n", i); + + ret = media_device_register_entity(dev->media_dev, ent); + if (ret < 0) + dev_err(&dev->intf->dev, + "failed to register input entity %d!\n", i); + } +#endif +} + +/* + * Videobuf2 operations + */ + +static int queue_setup(struct vb2_queue *vq, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], struct device *alloc_devs[]) +{ + struct em28xx *dev = vb2_get_drv_priv(vq); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + unsigned long size = + (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; + + if (*nplanes) + return sizes[0] < size ? -EINVAL : 0; + *nplanes = 1; + sizes[0] = size; + + em28xx_enable_analog_tuner(dev); + + return 0; +} + +static int +buffer_prepare(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + unsigned long size; + + em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field); + + size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; + + if (vb2_plane_size(vb, 0) < size) { + em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n", + __func__, vb2_plane_size(vb, 0), size); + return -EINVAL; + } + vb2_set_plane_payload(vb, 0, size); + + return 0; +} + +int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct em28xx *dev = vb2_get_drv_priv(vq); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct v4l2_frequency f; + struct v4l2_fh *owner; + int rc = 0; + + em28xx_videodbg("%s\n", __func__); + + dev->v4l2->field_count = 0; + + /* + * Make sure streaming is not already in progress for this type + * of filehandle (e.g. video, vbi) + */ + rc = res_get(dev, vq->type); + if (rc) + return rc; + + if (v4l2->streaming_users == 0) { + /* First active streaming user, so allocate all the URBs */ + + /* Allocate the USB bandwidth */ + em28xx_set_alternate(dev); + + /* + * Needed, since GPIO might have disabled power of + * some i2c device + */ + em28xx_wake_i2c(dev); + + v4l2->capture_type = -1; + rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, + dev->analog_xfer_bulk, + EM28XX_NUM_BUFS, + dev->max_pkt_size, + dev->packet_multiplier, + em28xx_urb_data_copy); + if (rc < 0) + return rc; + + /* + * djh: it's not clear whether this code is still needed. I'm + * leaving it in here for now entirely out of concern for + * backward compatibility (the old code did it) + */ + + /* Ask tuner to go to analog or radio mode */ + memset(&f, 0, sizeof(f)); + f.frequency = v4l2->frequency; + owner = (struct v4l2_fh *)vq->owner; + if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO) + f.type = V4L2_TUNER_RADIO; + else + f.type = V4L2_TUNER_ANALOG_TV; + v4l2_device_call_all(&v4l2->v4l2_dev, + 0, tuner, s_frequency, &f); + + /* Enable video stream at TV decoder */ + v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1); + } + + v4l2->streaming_users++; + + return rc; +} + +static void em28xx_stop_streaming(struct vb2_queue *vq) +{ + struct em28xx *dev = vb2_get_drv_priv(vq); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct em28xx_dmaqueue *vidq = &dev->vidq; + unsigned long flags = 0; + + em28xx_videodbg("%s\n", __func__); + + res_free(dev, vq->type); + + if (v4l2->streaming_users-- == 1) { + /* Disable video stream at TV decoder */ + v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0); + + /* Last active user, so shutdown all the URBS */ + em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); + } + + spin_lock_irqsave(&dev->slock, flags); + if (dev->usb_ctl.vid_buf) { + vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf, + VB2_BUF_STATE_ERROR); + dev->usb_ctl.vid_buf = NULL; + } + while (!list_empty(&vidq->active)) { + struct em28xx_buffer *buf; + + buf = list_entry(vidq->active.next, struct em28xx_buffer, list); + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + spin_unlock_irqrestore(&dev->slock, flags); +} + +void em28xx_stop_vbi_streaming(struct vb2_queue *vq) +{ + struct em28xx *dev = vb2_get_drv_priv(vq); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct em28xx_dmaqueue *vbiq = &dev->vbiq; + unsigned long flags = 0; + + em28xx_videodbg("%s\n", __func__); + + res_free(dev, vq->type); + + if (v4l2->streaming_users-- == 1) { + /* Disable video stream at TV decoder */ + v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0); + + /* Last active user, so shutdown all the URBS */ + em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); + } + + spin_lock_irqsave(&dev->slock, flags); + if (dev->usb_ctl.vbi_buf) { + vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf, + VB2_BUF_STATE_ERROR); + dev->usb_ctl.vbi_buf = NULL; + } + while (!list_empty(&vbiq->active)) { + struct em28xx_buffer *buf; + + buf = list_entry(vbiq->active.next, struct em28xx_buffer, list); + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + spin_unlock_irqrestore(&dev->slock, flags); +} + +static void +buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); + struct em28xx_buffer *buf = + container_of(vbuf, struct em28xx_buffer, vb); + struct em28xx_dmaqueue *vidq = &dev->vidq; + unsigned long flags = 0; + + em28xx_videodbg("%s\n", __func__); + buf->mem = vb2_plane_vaddr(vb, 0); + buf->length = vb2_plane_size(vb, 0); + + spin_lock_irqsave(&dev->slock, flags); + list_add_tail(&buf->list, &vidq->active); + spin_unlock_irqrestore(&dev->slock, flags); +} + +static const struct vb2_ops em28xx_video_qops = { + .queue_setup = queue_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .start_streaming = em28xx_start_analog_streaming, + .stop_streaming = em28xx_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +static int em28xx_vb2_setup(struct em28xx *dev) +{ + int rc; + struct vb2_queue *q; + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + /* Setup Videobuf2 for Video capture */ + q = &v4l2->vb_vidq; + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->drv_priv = dev; + q->buf_struct_size = sizeof(struct em28xx_buffer); + q->ops = &em28xx_video_qops; + q->mem_ops = &vb2_vmalloc_memops; + + rc = vb2_queue_init(q); + if (rc < 0) + return rc; + + /* Setup Videobuf2 for VBI capture */ + q = &v4l2->vb_vbiq; + q->type = V4L2_BUF_TYPE_VBI_CAPTURE; + q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->drv_priv = dev; + q->buf_struct_size = sizeof(struct em28xx_buffer); + q->ops = &em28xx_vbi_qops; + q->mem_ops = &vb2_vmalloc_memops; + + rc = vb2_queue_init(q); + if (rc < 0) + return rc; + + return 0; +} + +/* + * v4l2 interface + */ + +static void video_mux(struct em28xx *dev, int index) +{ + struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; + + dev->ctl_input = index; + dev->ctl_ainput = INPUT(index)->amux; + dev->ctl_aoutput = INPUT(index)->aout; + + if (!dev->ctl_aoutput) + dev->ctl_aoutput = EM28XX_AOUT_MASTER; + + v4l2_device_call_all(v4l2_dev, 0, video, s_routing, + INPUT(index)->vmux, 0, 0); + + if (dev->has_msp34xx) { + if (dev->i2s_speed) { + v4l2_device_call_all(v4l2_dev, 0, audio, + s_i2s_clock_freq, dev->i2s_speed); + } + /* Note: this is msp3400 specific */ + v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, + dev->ctl_ainput, + MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0); + } + + if (dev->board.adecoder != EM28XX_NOADECODER) { + v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, + dev->ctl_ainput, dev->ctl_aoutput, 0); + } + + em28xx_audio_analog_set(dev); +} + +static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv) +{ + struct em28xx *dev = priv; + + /* + * In the case of non-AC97 volume controls, we still need + * to do some setups at em28xx, in order to mute/unmute + * and to adjust audio volume. However, the value ranges + * should be checked by the corresponding V4L subdriver. + */ + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + dev->mute = ctrl->val; + em28xx_audio_analog_set(dev); + break; + case V4L2_CID_AUDIO_VOLUME: + dev->volume = ctrl->val; + em28xx_audio_analog_set(dev); + break; + } +} + +static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct em28xx_v4l2 *v4l2 = + container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler); + struct em28xx *dev = v4l2->dev; + int ret = -EINVAL; + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + dev->mute = ctrl->val; + ret = em28xx_audio_analog_set(dev); + break; + case V4L2_CID_AUDIO_VOLUME: + dev->volume = ctrl->val; + ret = em28xx_audio_analog_set(dev); + break; + case V4L2_CID_CONTRAST: + ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val); + break; + case V4L2_CID_BRIGHTNESS: + ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val); + break; + case V4L2_CID_SATURATION: + ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val); + break; + case V4L2_CID_BLUE_BALANCE: + ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val); + break; + case V4L2_CID_RED_BALANCE: + ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val); + break; + case V4L2_CID_SHARPNESS: + ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val); + break; + } + + return (ret < 0) ? ret : 0; +} + +static const struct v4l2_ctrl_ops em28xx_ctrl_ops = { + .s_ctrl = em28xx_s_ctrl, +}; + +static void size_to_scale(struct em28xx *dev, + unsigned int width, unsigned int height, + unsigned int *hscale, unsigned int *vscale) +{ + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + + *hscale = (((unsigned long)maxw) << 12) / width - 4096L; + if (*hscale > EM28XX_HVSCALE_MAX) + *hscale = EM28XX_HVSCALE_MAX; + + *vscale = (((unsigned long)maxh) << 12) / height - 4096L; + if (*vscale > EM28XX_HVSCALE_MAX) + *vscale = EM28XX_HVSCALE_MAX; +} + +static void scale_to_size(struct em28xx *dev, + unsigned int hscale, unsigned int vscale, + unsigned int *width, unsigned int *height) +{ + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + + *width = (((unsigned long)maxw) << 12) / (hscale + 4096L); + *height = (((unsigned long)maxh) << 12) / (vscale + 4096L); + + /* Don't let width or height to be zero */ + if (*width < 1) + *width = 1; + if (*height < 1) + *height = 1; +} + +/* + * IOCTL vidioc handling + */ + +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + f->fmt.pix.width = v4l2->width; + f->fmt.pix.height = v4l2->height; + f->fmt.pix.pixelformat = v4l2->format->fourcc; + f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3; + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + + /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ + if (v4l2->progressive) + f->fmt.pix.field = V4L2_FIELD_NONE; + else + f->fmt.pix.field = v4l2->interlaced_fieldmode ? + V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; + return 0; +} + +static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(format); i++) + if (format[i].fourcc == fourcc) + return &format[i]; + + return NULL; +} + +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + unsigned int width = f->fmt.pix.width; + unsigned int height = f->fmt.pix.height; + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + unsigned int hscale, vscale; + struct em28xx_fmt *fmt; + + fmt = format_by_fourcc(f->fmt.pix.pixelformat); + if (!fmt) { + fmt = &format[0]; + em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n", + f->fmt.pix.pixelformat, fmt->fourcc); + } + + if (dev->board.is_em2800) { + /* the em2800 can only scale down to 50% */ + height = height > (3 * maxh / 4) ? maxh : maxh / 2; + width = width > (3 * maxw / 4) ? maxw : maxw / 2; + /* + * MaxPacketSize for em2800 is too small to capture at full + * resolution use half of maxw as the scaler can only scale + * to 50% + */ + if (width == maxw && height == maxh) + width /= 2; + } else { + /* + * width must even because of the YUYV format + * height must be even because of interlacing + */ + v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, + 1, 0); + } + /* Avoid division by zero at size_to_scale */ + if (width < 1) + width = 1; + if (height < 1) + height = 1; + + size_to_scale(dev, width, height, &hscale, &vscale); + scale_to_size(dev, hscale, vscale, &width, &height); + + f->fmt.pix.width = width; + f->fmt.pix.height = height; + f->fmt.pix.pixelformat = fmt->fourcc; + f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3; + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + if (v4l2->progressive) + f->fmt.pix.field = V4L2_FIELD_NONE; + else + f->fmt.pix.field = v4l2->interlaced_fieldmode ? + V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; + + return 0; +} + +static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, + unsigned int width, unsigned int height) +{ + struct em28xx_fmt *fmt; + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + fmt = format_by_fourcc(fourcc); + if (!fmt) + return -EINVAL; + + v4l2->format = fmt; + v4l2->width = width; + v4l2->height = height; + + /* set new image size */ + size_to_scale(dev, v4l2->width, v4l2->height, + &v4l2->hscale, &v4l2->vscale); + + em28xx_resolution_set(dev); + + return 0; +} + +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + if (vb2_is_busy(&v4l2->vb_vidq)) + return -EBUSY; + + vidioc_try_fmt_vid_cap(file, priv, f); + + return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, + f->fmt.pix.width, f->fmt.pix.height); +} + +static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) +{ + struct em28xx *dev = video_drvdata(file); + + *norm = dev->v4l2->norm; + + return 0; +} + +static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) +{ + struct em28xx *dev = video_drvdata(file); + + v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm); + + return 0; +} + +static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) +{ + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct v4l2_format f; + + if (norm == v4l2->norm) + return 0; + + if (v4l2->streaming_users > 0) + return -EBUSY; + + v4l2->norm = norm; + + /* Adjusts width/height, if needed */ + f.fmt.pix.width = 720; + f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576; + vidioc_try_fmt_vid_cap(file, priv, &f); + + /* set new image size */ + v4l2->width = f.fmt.pix.width; + v4l2->height = f.fmt.pix.height; + size_to_scale(dev, v4l2->width, v4l2->height, + &v4l2->hscale, &v4l2->vscale); + + em28xx_resolution_set(dev); + v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); + + return 0; +} + +static int vidioc_g_parm(struct file *file, void *priv, + struct v4l2_streamparm *p) +{ + struct v4l2_subdev_frame_interval ival = { 0 }; + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + int rc = 0; + + if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && + p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) + return -EINVAL; + + p->parm.capture.readbuffers = EM28XX_MIN_BUF; + p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + if (dev->is_webcam) { + rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0, + video, g_frame_interval, &ival); + if (!rc) + p->parm.capture.timeperframe = ival.interval; + } else { + v4l2_video_std_frame_period(v4l2->norm, + &p->parm.capture.timeperframe); + } + + return rc; +} + +static int vidioc_s_parm(struct file *file, void *priv, + struct v4l2_streamparm *p) +{ + struct em28xx *dev = video_drvdata(file); + struct v4l2_subdev_frame_interval ival = { + 0, + p->parm.capture.timeperframe + }; + int rc = 0; + + if (!dev->is_webcam) + return -ENOTTY; + + if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && + p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) + return -EINVAL; + + memset(&p->parm, 0, sizeof(p->parm)); + p->parm.capture.readbuffers = EM28XX_MIN_BUF; + p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0, + video, s_frame_interval, &ival); + if (!rc) + p->parm.capture.timeperframe = ival.interval; + return rc; +} + +static int vidioc_enum_input(struct file *file, void *priv, + struct v4l2_input *i) +{ + struct em28xx *dev = video_drvdata(file); + unsigned int n; + int j; + + n = i->index; + if (n >= MAX_EM28XX_INPUT) + return -EINVAL; + if (!INPUT(n)->type) + return -EINVAL; + + i->type = V4L2_INPUT_TYPE_CAMERA; + + strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name)); + + if (INPUT(n)->type == EM28XX_VMUX_TELEVISION) + i->type = V4L2_INPUT_TYPE_TUNER; + + i->std = dev->v4l2->vdev.tvnorms; + /* webcams do not have the STD API */ + if (dev->is_webcam) + i->capabilities = 0; + + /* Dynamically generates an audioset bitmask */ + i->audioset = 0; + for (j = 0; j < MAX_EM28XX_INPUT; j++) + if (dev->amux_map[j] != EM28XX_AMUX_UNUSED) + i->audioset |= 1 << j; + + return 0; +} + +static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) +{ + struct em28xx *dev = video_drvdata(file); + + *i = dev->ctl_input; + + return 0; +} + +static int vidioc_s_input(struct file *file, void *priv, unsigned int i) +{ + struct em28xx *dev = video_drvdata(file); + + if (i >= MAX_EM28XX_INPUT) + return -EINVAL; + if (!INPUT(i)->type) + return -EINVAL; + + video_mux(dev, i); + return 0; +} + +static int em28xx_fill_audio_input(struct em28xx *dev, + const char *s, + struct v4l2_audio *a, + unsigned int index) +{ + unsigned int idx = dev->amux_map[index]; + + /* + * With msp3400, almost all mappings use the default (amux = 0). + * The only one may use a different value is WinTV USB2, where it + * can also be SCART1 input. + * As it is very doubtful that we would see new boards with msp3400, + * let's just reuse the existing switch. + */ + if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED) + idx = EM28XX_AMUX_LINE_IN; + + switch (idx) { + case EM28XX_AMUX_VIDEO: + strscpy(a->name, "Television", sizeof(a->name)); + break; + case EM28XX_AMUX_LINE_IN: + strscpy(a->name, "Line In", sizeof(a->name)); + break; + case EM28XX_AMUX_VIDEO2: + strscpy(a->name, "Television alt", sizeof(a->name)); + break; + case EM28XX_AMUX_PHONE: + strscpy(a->name, "Phone", sizeof(a->name)); + break; + case EM28XX_AMUX_MIC: + strscpy(a->name, "Mic", sizeof(a->name)); + break; + case EM28XX_AMUX_CD: + strscpy(a->name, "CD", sizeof(a->name)); + break; + case EM28XX_AMUX_AUX: + strscpy(a->name, "Aux", sizeof(a->name)); + break; + case EM28XX_AMUX_PCM_OUT: + strscpy(a->name, "PCM", sizeof(a->name)); + break; + case EM28XX_AMUX_UNUSED: + default: + return -EINVAL; + } + a->index = index; + a->capability = V4L2_AUDCAP_STEREO; + + em28xx_videodbg("%s: audio input index %d is '%s'\n", + s, a->index, a->name); + + return 0; +} + +static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a) +{ + struct em28xx *dev = video_drvdata(file); + + if (a->index >= MAX_EM28XX_INPUT) + return -EINVAL; + + return em28xx_fill_audio_input(dev, __func__, a, a->index); +} + +static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) +{ + struct em28xx *dev = video_drvdata(file); + int i; + + for (i = 0; i < MAX_EM28XX_INPUT; i++) + if (dev->ctl_ainput == dev->amux_map[i]) + return em28xx_fill_audio_input(dev, __func__, a, i); + + /* Should never happen! */ + return -EINVAL; +} + +static int vidioc_s_audio(struct file *file, void *priv, + const struct v4l2_audio *a) +{ + struct em28xx *dev = video_drvdata(file); + int idx, i; + + if (a->index >= MAX_EM28XX_INPUT) + return -EINVAL; + + idx = dev->amux_map[a->index]; + + if (idx == EM28XX_AMUX_UNUSED) + return -EINVAL; + + dev->ctl_ainput = idx; + + /* + * FIXME: This is wrong, as different inputs at em28xx_cards + * may have different audio outputs. So, the right thing + * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT. + * With the current board definitions, this would work fine, + * as, currently, all boards fit. + */ + for (i = 0; i < MAX_EM28XX_INPUT; i++) + if (idx == dev->amux_map[i]) + break; + if (i == MAX_EM28XX_INPUT) + return -EINVAL; + + dev->ctl_aoutput = INPUT(i)->aout; + + if (!dev->ctl_aoutput) + dev->ctl_aoutput = EM28XX_AOUT_MASTER; + + em28xx_videodbg("%s: set audio input to %d\n", __func__, + dev->ctl_ainput); + + return 0; +} + +static int vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *t) +{ + struct em28xx *dev = video_drvdata(file); + + if (t->index != 0) + return -EINVAL; + + strscpy(t->name, "Tuner", sizeof(t->name)); + + v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); + return 0; +} + +static int vidioc_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *t) +{ + struct em28xx *dev = video_drvdata(file); + + if (t->index != 0) + return -EINVAL; + + v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); + return 0; +} + +static int vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + if (f->tuner != 0) + return -EINVAL; + + f->frequency = v4l2->frequency; + return 0; +} + +static int vidioc_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *f) +{ + struct v4l2_frequency new_freq = *f; + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + if (f->tuner != 0) + return -EINVAL; + + v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f); + v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq); + v4l2->frequency = new_freq.frequency; + + return 0; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int vidioc_g_chip_info(struct file *file, void *priv, + struct v4l2_dbg_chip_info *chip) +{ + struct em28xx *dev = video_drvdata(file); + + if (chip->match.addr > 1) + return -EINVAL; + if (chip->match.addr == 1) + strscpy(chip->name, "ac97", sizeof(chip->name)); + else + strscpy(chip->name, + dev->v4l2->v4l2_dev.name, sizeof(chip->name)); + return 0; +} + +static int em28xx_reg_len(int reg) +{ + switch (reg) { + case EM28XX_R40_AC97LSB: + case EM28XX_R30_HSCALELOW: + case EM28XX_R32_VSCALELOW: + return 2; + default: + return 1; + } +} + +static int vidioc_g_register(struct file *file, void *priv, + struct v4l2_dbg_register *reg) +{ + struct em28xx *dev = video_drvdata(file); + int ret; + + if (reg->match.addr > 1) + return -EINVAL; + if (reg->match.addr) { + ret = em28xx_read_ac97(dev, reg->reg); + if (ret < 0) + return ret; + + reg->val = ret; + reg->size = 1; + return 0; + } + + /* Match host */ + reg->size = em28xx_reg_len(reg->reg); + if (reg->size == 1) { + ret = em28xx_read_reg(dev, reg->reg); + + if (ret < 0) + return ret; + + reg->val = ret; + } else { + __le16 val = 0; + + ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, + reg->reg, (char *)&val, 2); + if (ret < 0) + return ret; + + reg->val = le16_to_cpu(val); + } + + return 0; +} + +static int vidioc_s_register(struct file *file, void *priv, + const struct v4l2_dbg_register *reg) +{ + struct em28xx *dev = video_drvdata(file); + __le16 buf; + + if (reg->match.addr > 1) + return -EINVAL; + if (reg->match.addr) + return em28xx_write_ac97(dev, reg->reg, reg->val); + + /* Match host */ + buf = cpu_to_le16(reg->val); + + return em28xx_write_regs(dev, reg->reg, (char *)&buf, + em28xx_reg_len(reg->reg)); +} +#endif + +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct usb_device *udev = interface_to_usbdev(dev->intf); + + strscpy(cap->driver, "em28xx", sizeof(cap->driver)); + strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); + usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info)); + + cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE | + V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) + cap->capabilities |= V4L2_CAP_AUDIO; + if (dev->tuner_type != TUNER_ABSENT) + cap->capabilities |= V4L2_CAP_TUNER; + if (video_is_registered(&v4l2->vbi_dev)) + cap->capabilities |= V4L2_CAP_VBI_CAPTURE; + if (video_is_registered(&v4l2->radio_dev)) + cap->capabilities |= V4L2_CAP_RADIO; + return 0; +} + +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (unlikely(f->index >= ARRAY_SIZE(format))) + return -EINVAL; + + f->pixelformat = format[f->index].fourcc; + + return 0; +} + +static int vidioc_enum_framesizes(struct file *file, void *priv, + struct v4l2_frmsizeenum *fsize) +{ + struct em28xx *dev = video_drvdata(file); + struct em28xx_fmt *fmt; + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + + fmt = format_by_fourcc(fsize->pixel_format); + if (!fmt) { + em28xx_videodbg("Fourcc format (%08x) invalid.\n", + fsize->pixel_format); + return -EINVAL; + } + + if (dev->board.is_em2800) { + if (fsize->index > 1) + return -EINVAL; + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + fsize->discrete.width = maxw / (1 + fsize->index); + fsize->discrete.height = maxh / (1 + fsize->index); + return 0; + } + + if (fsize->index != 0) + return -EINVAL; + + /* Report a continuous range */ + fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; + scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX, + &fsize->stepwise.min_width, &fsize->stepwise.min_height); + if (fsize->stepwise.min_width < 48) + fsize->stepwise.min_width = 48; + if (fsize->stepwise.min_height < 38) + fsize->stepwise.min_height = 38; + fsize->stepwise.max_width = maxw; + fsize->stepwise.max_height = maxh; + fsize->stepwise.step_width = 1; + fsize->stepwise.step_height = 1; + return 0; +} + +/* RAW VBI ioctls */ + +static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, + struct v4l2_format *format) +{ + struct em28xx *dev = video_drvdata(file); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + format->fmt.vbi.samples_per_line = v4l2->vbi_width; + format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; + format->fmt.vbi.offset = 0; + format->fmt.vbi.flags = 0; + format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; + format->fmt.vbi.count[0] = v4l2->vbi_height; + format->fmt.vbi.count[1] = v4l2->vbi_height; + memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved)); + + /* Varies by video standard (NTSC, PAL, etc.) */ + if (v4l2->norm & V4L2_STD_525_60) { + /* NTSC */ + format->fmt.vbi.start[0] = 10; + format->fmt.vbi.start[1] = 273; + } else if (v4l2->norm & V4L2_STD_625_50) { + /* PAL */ + format->fmt.vbi.start[0] = 6; + format->fmt.vbi.start[1] = 318; + } + + return 0; +} + +/* + * RADIO ESPECIFIC IOCTLS + */ + +static int radio_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *t) +{ + struct em28xx *dev = video_drvdata(file); + + if (unlikely(t->index > 0)) + return -EINVAL; + + strscpy(t->name, "Radio", sizeof(t->name)); + + v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); + + return 0; +} + +static int radio_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *t) +{ + struct em28xx *dev = video_drvdata(file); + + if (t->index != 0) + return -EINVAL; + + v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); + + return 0; +} + +/* + * em28xx_free_v4l2() - Free struct em28xx_v4l2 + * + * @ref: struct kref for struct em28xx_v4l2 + * + * Called when all users of struct em28xx_v4l2 are gone + */ +static void em28xx_free_v4l2(struct kref *ref) +{ + struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref); + + v4l2->dev->v4l2 = NULL; + kfree(v4l2); +} + +/* + * em28xx_v4l2_open() + * inits the device and starts isoc transfer + */ +static int em28xx_v4l2_open(struct file *filp) +{ + struct video_device *vdev = video_devdata(filp); + struct em28xx *dev = video_drvdata(filp); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + enum v4l2_buf_type fh_type = 0; + int ret; + + switch (vdev->vfl_type) { + case VFL_TYPE_VIDEO: + fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + break; + case VFL_TYPE_VBI: + fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; + break; + case VFL_TYPE_RADIO: + break; + default: + return -EINVAL; + } + + em28xx_videodbg("open dev=%s type=%s users=%d\n", + video_device_node_name(vdev), v4l2_type_names[fh_type], + v4l2->users); + + if (mutex_lock_interruptible(&dev->lock)) + return -ERESTARTSYS; + + ret = v4l2_fh_open(filp); + if (ret) { + dev_err(&dev->intf->dev, + "%s: v4l2_fh_open() returned error %d\n", + __func__, ret); + mutex_unlock(&dev->lock); + return ret; + } + + if (v4l2->users == 0) { + em28xx_set_mode(dev, EM28XX_ANALOG_MODE); + + if (vdev->vfl_type != VFL_TYPE_RADIO) + em28xx_resolution_set(dev); + + /* + * Needed, since GPIO might have disabled power + * of some i2c devices + */ + em28xx_wake_i2c(dev); + } + + if (vdev->vfl_type == VFL_TYPE_RADIO) { + em28xx_videodbg("video_open: setting radio device\n"); + v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio); + } + + kref_get(&dev->ref); + kref_get(&v4l2->ref); + v4l2->users++; + + mutex_unlock(&dev->lock); + + return 0; +} + +/* + * em28xx_v4l2_fini() + * unregisters the v4l2,i2c and usb devices + * called when the device gets disconnected or at module unload + */ +static int em28xx_v4l2_fini(struct em28xx *dev) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + + if (dev->is_audio_only) { + /* Shouldn't initialize IR for this interface */ + return 0; + } + + if (!dev->has_video) { + /* This device does not support the v4l2 extension */ + return 0; + } + + if (!v4l2) + return 0; + + dev_info(&dev->intf->dev, "Closing video extension\n"); + + mutex_lock(&dev->lock); + + v4l2_device_disconnect(&v4l2->v4l2_dev); + + em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); + + em28xx_v4l2_media_release(dev); + + if (video_is_registered(&v4l2->radio_dev)) { + dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", + video_device_node_name(&v4l2->radio_dev)); + video_unregister_device(&v4l2->radio_dev); + } + if (video_is_registered(&v4l2->vbi_dev)) { + dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", + video_device_node_name(&v4l2->vbi_dev)); + video_unregister_device(&v4l2->vbi_dev); + } + if (video_is_registered(&v4l2->vdev)) { + dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", + video_device_node_name(&v4l2->vdev)); + video_unregister_device(&v4l2->vdev); + } + + v4l2_ctrl_handler_free(&v4l2->ctrl_handler); + v4l2_device_unregister(&v4l2->v4l2_dev); + + kref_put(&v4l2->ref, em28xx_free_v4l2); + + mutex_unlock(&dev->lock); + + kref_put(&dev->ref, em28xx_free_device); + + return 0; +} + +static int em28xx_v4l2_suspend(struct em28xx *dev) +{ + if (dev->is_audio_only) + return 0; + + if (!dev->has_video) + return 0; + + dev_info(&dev->intf->dev, "Suspending video extension\n"); + em28xx_stop_urbs(dev); + return 0; +} + +static int em28xx_v4l2_resume(struct em28xx *dev) +{ + if (dev->is_audio_only) + return 0; + + if (!dev->has_video) + return 0; + + dev_info(&dev->intf->dev, "Resuming video extension\n"); + /* what do we do here */ + return 0; +} + +/* + * em28xx_v4l2_close() + * stops streaming and deallocates all resources allocated by the v4l2 + * calls and ioctls + */ +static int em28xx_v4l2_close(struct file *filp) +{ + struct em28xx *dev = video_drvdata(filp); + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct usb_device *udev = interface_to_usbdev(dev->intf); + int err; + + em28xx_videodbg("users=%d\n", v4l2->users); + + vb2_fop_release(filp); + mutex_lock(&dev->lock); + + if (v4l2->users == 1) { + /* No sense to try to write to the device */ + if (dev->disconnected) + goto exit; + + /* Save some power by putting tuner to sleep */ + v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); + + /* do this before setting alternate! */ + em28xx_set_mode(dev, EM28XX_SUSPEND); + + /* set alternate 0 */ + dev->alt = 0; + em28xx_videodbg("setting alternate 0\n"); + err = usb_set_interface(udev, 0, 0); + if (err < 0) { + dev_err(&dev->intf->dev, + "cannot change alternate number to 0 (error=%i)\n", + err); + } + } + +exit: + v4l2->users--; + kref_put(&v4l2->ref, em28xx_free_v4l2); + mutex_unlock(&dev->lock); + kref_put(&dev->ref, em28xx_free_device); + + return 0; +} + +static const struct v4l2_file_operations em28xx_v4l_fops = { + .owner = THIS_MODULE, + .open = em28xx_v4l2_open, + .release = em28xx_v4l2_close, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops video_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, + .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, + .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, + .vidioc_enum_framesizes = vidioc_enum_framesizes, + .vidioc_enumaudio = vidioc_enumaudio, + .vidioc_g_audio = vidioc_g_audio, + .vidioc_s_audio = vidioc_s_audio, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + + .vidioc_g_std = vidioc_g_std, + .vidioc_querystd = vidioc_querystd, + .vidioc_s_std = vidioc_s_std, + .vidioc_g_parm = vidioc_g_parm, + .vidioc_s_parm = vidioc_s_parm, + .vidioc_enum_input = vidioc_enum_input, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + .vidioc_g_tuner = vidioc_g_tuner, + .vidioc_s_tuner = vidioc_s_tuner, + .vidioc_g_frequency = vidioc_g_frequency, + .vidioc_s_frequency = vidioc_s_frequency, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .vidioc_g_chip_info = vidioc_g_chip_info, + .vidioc_g_register = vidioc_g_register, + .vidioc_s_register = vidioc_s_register, +#endif +}; + +static const struct video_device em28xx_video_template = { + .fops = &em28xx_v4l_fops, + .ioctl_ops = &video_ioctl_ops, + .release = video_device_release_empty, + .tvnorms = V4L2_STD_ALL, +}; + +static const struct v4l2_file_operations radio_fops = { + .owner = THIS_MODULE, + .open = em28xx_v4l2_open, + .release = em28xx_v4l2_close, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops radio_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_g_tuner = radio_g_tuner, + .vidioc_s_tuner = radio_s_tuner, + .vidioc_g_frequency = vidioc_g_frequency, + .vidioc_s_frequency = vidioc_s_frequency, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .vidioc_g_chip_info = vidioc_g_chip_info, + .vidioc_g_register = vidioc_g_register, + .vidioc_s_register = vidioc_s_register, +#endif +}; + +static struct video_device em28xx_radio_template = { + .fops = &radio_fops, + .ioctl_ops = &radio_ioctl_ops, + .release = video_device_release_empty, +}; + +/* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */ +static unsigned short saa711x_addrs[] = { + 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */ + 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */ + I2C_CLIENT_END }; + +static unsigned short tvp5150_addrs[] = { + 0xb8 >> 1, + 0xba >> 1, + I2C_CLIENT_END +}; + +static unsigned short msp3400_addrs[] = { + 0x80 >> 1, + 0x88 >> 1, + I2C_CLIENT_END +}; + +/******************************** usb interface ******************************/ + +static void em28xx_vdev_init(struct em28xx *dev, + struct video_device *vfd, + const struct video_device *template, + const char *type_name) +{ + *vfd = *template; + vfd->v4l2_dev = &dev->v4l2->v4l2_dev; + vfd->lock = &dev->lock; + if (dev->is_webcam) + vfd->tvnorms = 0; + + snprintf(vfd->name, sizeof(vfd->name), "%s %s", + dev_name(&dev->intf->dev), type_name); + + video_set_drvdata(vfd, dev); +} + +static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr) +{ + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev; + struct tuner_setup tun_setup; + struct v4l2_frequency f; + + memset(&tun_setup, 0, sizeof(tun_setup)); + + tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; + tun_setup.tuner_callback = em28xx_tuner_callback; + + if (dev->board.radio.type) { + tun_setup.type = dev->board.radio.type; + tun_setup.addr = dev->board.radio_addr; + + v4l2_device_call_all(v4l2_dev, + 0, tuner, s_type_addr, &tun_setup); + } + + if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) { + tun_setup.type = dev->tuner_type; + tun_setup.addr = tuner_addr; + + v4l2_device_call_all(v4l2_dev, + 0, tuner, s_type_addr, &tun_setup); + } + + if (dev->board.tda9887_conf) { + struct v4l2_priv_tun_config tda9887_cfg; + + tda9887_cfg.tuner = TUNER_TDA9887; + tda9887_cfg.priv = &dev->board.tda9887_conf; + + v4l2_device_call_all(v4l2_dev, + 0, tuner, s_config, &tda9887_cfg); + } + + if (dev->tuner_type == TUNER_XC2028) { + struct v4l2_priv_tun_config xc2028_cfg; + struct xc2028_ctrl ctl; + + memset(&xc2028_cfg, 0, sizeof(xc2028_cfg)); + memset(&ctl, 0, sizeof(ctl)); + + em28xx_setup_xc3028(dev, &ctl); + + xc2028_cfg.tuner = TUNER_XC2028; + xc2028_cfg.priv = &ctl; + + v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg); + } + + /* configure tuner */ + f.tuner = 0; + f.type = V4L2_TUNER_ANALOG_TV; + f.frequency = 9076; /* just a magic number */ + v4l2->frequency = f.frequency; + v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f); +} + +static int em28xx_v4l2_init(struct em28xx *dev) +{ + u8 val; + int ret; + unsigned int maxw; + struct v4l2_ctrl_handler *hdl; + struct em28xx_v4l2 *v4l2; + + if (dev->is_audio_only) { + /* Shouldn't initialize IR for this interface */ + return 0; + } + + if (!dev->has_video) { + /* This device does not support the v4l2 extension */ + return 0; + } + + dev_info(&dev->intf->dev, "Registering V4L2 extension\n"); + + mutex_lock(&dev->lock); + + v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL); + if (!v4l2) { + mutex_unlock(&dev->lock); + return -ENOMEM; + } + kref_init(&v4l2->ref); + v4l2->dev = dev; + dev->v4l2 = v4l2; + +#ifdef CONFIG_MEDIA_CONTROLLER + v4l2->v4l2_dev.mdev = dev->media_dev; +#endif + ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev); + if (ret < 0) { + dev_err(&dev->intf->dev, + "Call to v4l2_device_register() failed!\n"); + goto err; + } + + hdl = &v4l2->ctrl_handler; + v4l2_ctrl_handler_init(hdl, 8); + v4l2->v4l2_dev.ctrl_handler = hdl; + + if (dev->is_webcam) + v4l2->progressive = true; + + /* + * Default format, used for tvp5150 or saa711x output formats + */ + v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY; + v4l2->vinctl = EM28XX_VINCTRL_INTERLACED | + EM28XX_VINCTRL_CCIR656_ENABLE; + + /* request some modules */ + + if (dev->has_msp34xx) + v4l2_i2c_new_subdev(&v4l2->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + "msp3400", 0, msp3400_addrs); + + if (dev->board.decoder == EM28XX_SAA711X) + v4l2_i2c_new_subdev(&v4l2->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + "saa7115_auto", 0, saa711x_addrs); + + if (dev->board.decoder == EM28XX_TVP5150) + v4l2_i2c_new_subdev(&v4l2->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + "tvp5150", 0, tvp5150_addrs); + + if (dev->board.adecoder == EM28XX_TVAUDIO) + v4l2_i2c_new_subdev(&v4l2->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + "tvaudio", dev->board.tvaudio_addr, NULL); + + /* Initialize tuner and camera */ + + if (dev->board.tuner_type != TUNER_ABSENT) { + unsigned short tuner_addr = dev->board.tuner_addr; + int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT); + + if (dev->board.radio.type) + v4l2_i2c_new_subdev(&v4l2->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + "tuner", dev->board.radio_addr, + NULL); + + if (has_demod) + v4l2_i2c_new_subdev(&v4l2->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + "tuner", 0, + v4l2_i2c_tuner_addrs(ADDRS_DEMOD)); + if (tuner_addr == 0) { + enum v4l2_i2c_tuner_type type = + has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV; + struct v4l2_subdev *sd; + + sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + "tuner", 0, + v4l2_i2c_tuner_addrs(type)); + + if (sd) + tuner_addr = v4l2_i2c_subdev_addr(sd); + } else { + v4l2_i2c_new_subdev(&v4l2->v4l2_dev, + &dev->i2c_adap[dev->def_i2c_bus], + "tuner", tuner_addr, NULL); + } + + em28xx_tuner_setup(dev, tuner_addr); + } + + if (dev->em28xx_sensor != EM28XX_NOSENSOR) + em28xx_init_camera(dev); + + /* Configure audio */ + ret = em28xx_audio_setup(dev); + if (ret < 0) { + dev_err(&dev->intf->dev, + "%s: Error while setting audio - error [%d]!\n", + __func__, ret); + goto unregister_dev; + } + if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { + v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, + V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); + v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, + V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f); + } else { + /* install the em28xx notify callback */ + v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE), + em28xx_ctrl_notify, dev); + v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME), + em28xx_ctrl_notify, dev); + } + + /* wake i2c devices */ + em28xx_wake_i2c(dev); + + /* init video dma queues */ + INIT_LIST_HEAD(&dev->vidq.active); + INIT_LIST_HEAD(&dev->vbiq.active); + + if (dev->has_msp34xx) { + /* Send a reset to other chips via gpio */ + ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7); + if (ret < 0) { + dev_err(&dev->intf->dev, + "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n", + __func__, ret); + goto unregister_dev; + } + usleep_range(10000, 11000); + + ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff); + if (ret < 0) { + dev_err(&dev->intf->dev, + "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n", + __func__, ret); + goto unregister_dev; + } + usleep_range(10000, 11000); + } + + /* set default norm */ + v4l2->norm = V4L2_STD_PAL; + v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); + v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT; + + /* Analog specific initialization */ + v4l2->format = &format[0]; + + maxw = norm_maxw(dev); + /* + * MaxPacketSize for em2800 is too small to capture at full resolution + * use half of maxw as the scaler can only scale to 50% + */ + if (dev->board.is_em2800) + maxw /= 2; + + em28xx_set_video_format(dev, format[0].fourcc, + maxw, norm_maxh(dev)); + + video_mux(dev, 0); + + /* Audio defaults */ + dev->mute = 1; + dev->volume = 0x1f; + +/* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ + val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); + em28xx_write_reg(dev, EM28XX_R0F_XCLK, + (EM28XX_XCLK_AUDIO_UNMUTE | val)); + + em28xx_set_outfmt(dev); + + /* Add image controls */ + + /* + * NOTE: at this point, the subdevices are already registered, so + * bridge controls are only added/enabled when no subdevice provides + * them + */ + if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST)) + v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, + V4L2_CID_CONTRAST, + 0, 0x1f, 1, CONTRAST_DEFAULT); + if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS)) + v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, + V4L2_CID_BRIGHTNESS, + -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT); + if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION)) + v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, + V4L2_CID_SATURATION, + 0, 0x1f, 1, SATURATION_DEFAULT); + if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE)) + v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, + V4L2_CID_BLUE_BALANCE, + -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT); + if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE)) + v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, + V4L2_CID_RED_BALANCE, + -0x30, 0x30, 1, RED_BALANCE_DEFAULT); + if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS)) + v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, + V4L2_CID_SHARPNESS, + 0, 0x0f, 1, SHARPNESS_DEFAULT); + + /* Reset image controls */ + em28xx_colorlevels_set_default(dev); + v4l2_ctrl_handler_setup(hdl); + ret = hdl->error; + if (ret) + goto unregister_dev; + + /* allocate and fill video video_device struct */ + em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video"); + mutex_init(&v4l2->vb_queue_lock); + mutex_init(&v4l2->vb_vbi_queue_lock); + v4l2->vdev.queue = &v4l2->vb_vidq; + v4l2->vdev.queue->lock = &v4l2->vb_queue_lock; + v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_STREAMING; + if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) + v4l2->vdev.device_caps |= V4L2_CAP_AUDIO; + if (dev->tuner_type != TUNER_ABSENT) + v4l2->vdev.device_caps |= V4L2_CAP_TUNER; + + + /* disable inapplicable ioctls */ + if (dev->is_webcam) { + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD); + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD); + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD); + } else { + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM); + } + if (dev->tuner_type == TUNER_ABSENT) { + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER); + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER); + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY); + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY); + } + if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO); + v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO); + } + + /* register v4l2 video video_device */ + ret = video_register_device(&v4l2->vdev, VFL_TYPE_VIDEO, + video_nr[dev->devno]); + if (ret) { + dev_err(&dev->intf->dev, + "unable to register video device (error=%i).\n", ret); + goto unregister_dev; + } + + /* Allocate and fill vbi video_device struct */ + if (em28xx_vbi_supported(dev) == 1) { + em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template, + "vbi"); + + v4l2->vbi_dev.queue = &v4l2->vb_vbiq; + v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock; + v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING | + V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE; + if (dev->tuner_type != TUNER_ABSENT) + v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER; + + /* disable inapplicable ioctls */ + v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM); + if (dev->tuner_type == TUNER_ABSENT) { + v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER); + v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER); + v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY); + v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY); + } + if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { + v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO); + v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO); + } + + /* register v4l2 vbi video_device */ + ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI, + vbi_nr[dev->devno]); + if (ret < 0) { + dev_err(&dev->intf->dev, + "unable to register vbi device\n"); + goto unregister_dev; + } + } + + if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { + em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template, + "radio"); + v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER; + ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO, + radio_nr[dev->devno]); + if (ret < 0) { + dev_err(&dev->intf->dev, + "can't register radio device\n"); + goto unregister_dev; + } + dev_info(&dev->intf->dev, + "Registered radio device as %s\n", + video_device_node_name(&v4l2->radio_dev)); + } + + /* Init entities at the Media Controller */ + em28xx_v4l2_create_entities(dev); + +#ifdef CONFIG_MEDIA_CONTROLLER + ret = v4l2_mc_create_media_graph(dev->media_dev); + if (ret) { + dev_err(&dev->intf->dev, + "failed to create media graph\n"); + em28xx_v4l2_media_release(dev); + goto unregister_dev; + } +#endif + + dev_info(&dev->intf->dev, + "V4L2 video device registered as %s\n", + video_device_node_name(&v4l2->vdev)); + + if (video_is_registered(&v4l2->vbi_dev)) + dev_info(&dev->intf->dev, + "V4L2 VBI device registered as %s\n", + video_device_node_name(&v4l2->vbi_dev)); + + /* Save some power by putting tuner to sleep */ + v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); + + /* initialize videobuf2 stuff */ + em28xx_vb2_setup(dev); + + dev_info(&dev->intf->dev, + "V4L2 extension successfully initialized\n"); + + kref_get(&dev->ref); + + mutex_unlock(&dev->lock); + return 0; + +unregister_dev: + if (video_is_registered(&v4l2->radio_dev)) { + dev_info(&dev->intf->dev, + "V4L2 device %s deregistered\n", + video_device_node_name(&v4l2->radio_dev)); + video_unregister_device(&v4l2->radio_dev); + } + if (video_is_registered(&v4l2->vbi_dev)) { + dev_info(&dev->intf->dev, + "V4L2 device %s deregistered\n", + video_device_node_name(&v4l2->vbi_dev)); + video_unregister_device(&v4l2->vbi_dev); + } + if (video_is_registered(&v4l2->vdev)) { + dev_info(&dev->intf->dev, + "V4L2 device %s deregistered\n", + video_device_node_name(&v4l2->vdev)); + video_unregister_device(&v4l2->vdev); + } + + v4l2_ctrl_handler_free(&v4l2->ctrl_handler); + v4l2_device_unregister(&v4l2->v4l2_dev); +err: + dev->v4l2 = NULL; + kref_put(&v4l2->ref, em28xx_free_v4l2); + mutex_unlock(&dev->lock); + return ret; +} + +static struct em28xx_ops v4l2_ops = { + .id = EM28XX_V4L2, + .name = "Em28xx v4l2 Extension", + .init = em28xx_v4l2_init, + .fini = em28xx_v4l2_fini, + .suspend = em28xx_v4l2_suspend, + .resume = em28xx_v4l2_resume, +}; + +static int __init em28xx_video_register(void) +{ + return em28xx_register_extension(&v4l2_ops); +} + +static void __exit em28xx_video_unregister(void) +{ + em28xx_unregister_extension(&v4l2_ops); +} + +module_init(em28xx_video_register); +module_exit(em28xx_video_unregister); |