diff options
author | Maciej S. Szmigiero <mail@maciej.szmigiero.name> | 2019-04-29 12:16:58 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-05-28 16:03:12 -0400 |
commit | e478d40540544e229c843fe0c698ebc7d0ca07e6 (patch) | |
tree | 4e93bfce9e81dcc071862fb545c978a9483c733c | |
parent | d525e5c2f1b7f3bf198aeb56b039a682de4b00df (diff) |
media: cxusb: add analog mode support for Medion MD95700
This patch adds support for analog part of Medion 95700 in the cxusb
driver.
What works:
* Video capture at various sizes with sequential fields,
* Input switching (TV Tuner, Composite, S-Video),
* TV and radio tuning,
* Video standard switching and auto detection,
* Radio mode switching (stereo / mono),
* Unplugging while capturing,
* DVB / analog coexistence.
What does not work yet:
* Audio,
* VBI,
* Picture controls.
Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: remove left-over commented-out debug message]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
-rw-r--r-- | drivers/media/usb/dvb-usb/Kconfig | 16 | ||||
-rw-r--r-- | drivers/media/usb/dvb-usb/Makefile | 3 | ||||
-rw-r--r-- | drivers/media/usb/dvb-usb/cxusb-analog.c | 1845 | ||||
-rw-r--r-- | drivers/media/usb/dvb-usb/cxusb.c | 2 | ||||
-rw-r--r-- | drivers/media/usb/dvb-usb/cxusb.h | 106 |
5 files changed, 1968 insertions, 4 deletions
diff --git a/drivers/media/usb/dvb-usb/Kconfig b/drivers/media/usb/dvb-usb/Kconfig index 87dbae875177..1a3e5f965ae4 100644 --- a/drivers/media/usb/dvb-usb/Kconfig +++ b/drivers/media/usb/dvb-usb/Kconfig @@ -139,12 +139,24 @@ config DVB_USB_CXUSB select MEDIA_TUNER_SI2157 if MEDIA_SUBDRV_AUTOSELECT help Say Y here to support the Conexant USB2.0 hybrid reference design. - Currently, only DVB and ATSC modes are supported, analog mode - shall be added in the future. Devices that require this module: + DVB and ATSC modes are supported, for a basic analog mode support + see the next option ("Analog support for the Conexant USB2.0 hybrid + reference design"). + Devices that require this module: Medion MD95700 hybrid USB2.0 device. DViCO FusionHDTV (Bluebird) USB2.0 devices +config DVB_USB_CXUSB_ANALOG + bool "Analog support for the Conexant USB2.0 hybrid reference design" + depends on DVB_USB_CXUSB && VIDEO_V4L2 + select VIDEO_CX25840 + select VIDEOBUF2_VMALLOC + help + Say Y here to enable basic analog mode support for the Conexant + USB2.0 hybrid reference design. + Currently this mode is supported only on a Medion MD95700 device. + config DVB_USB_M920X tristate "Uli m920x DVB-T USB2.0 support" depends on DVB_USB diff --git a/drivers/media/usb/dvb-usb/Makefile b/drivers/media/usb/dvb-usb/Makefile index 407d90ca8be0..28e4806a87cd 100644 --- a/drivers/media/usb/dvb-usb/Makefile +++ b/drivers/media/usb/dvb-usb/Makefile @@ -42,6 +42,9 @@ dvb-usb-digitv-objs := digitv.o obj-$(CONFIG_DVB_USB_DIGITV) += dvb-usb-digitv.o dvb-usb-cxusb-objs := cxusb.o +ifeq ($(CONFIG_DVB_USB_CXUSB_ANALOG),y) +dvb-usb-cxusb-objs += cxusb-analog.o +endif obj-$(CONFIG_DVB_USB_CXUSB) += dvb-usb-cxusb.o dvb-usb-ttusb2-objs := ttusb2.o diff --git a/drivers/media/usb/dvb-usb/cxusb-analog.c b/drivers/media/usb/dvb-usb/cxusb-analog.c new file mode 100644 index 000000000000..8df6c33bbbb1 --- /dev/null +++ b/drivers/media/usb/dvb-usb/cxusb-analog.c @@ -0,0 +1,1845 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// DVB USB compliant linux driver for Conexant USB reference design - +// (analog part). +// +// Copyright (C) 2011, 2017, 2018 +// Maciej S. Szmigiero (mail@maciej.szmigiero.name) +// +// In case there are new analog / DVB-T hybrid devices released in the market +// using the same general design as Medion MD95700: a CX25840 video decoder +// outputting a BT.656 stream to a USB bridge chip which then forwards it to +// the host in isochronous USB packets this code should be made generic, with +// board specific bits implemented via separate card structures. +// +// This is, however, unlikely as the Medion model was released +// years ago (in 2005). +// +// TODO: +// * audio support, +// * finish radio support (requires audio of course), +// * VBI support, +// * controls support + +#include <linux/bitops.h> +#include <linux/device.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/timekeeping.h> +#include <linux/vmalloc.h> +#include <media/drv-intf/cx25840.h> +#include <media/tuner.h> +#include <media/v4l2-fh.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-subdev.h> +#include <media/videobuf2-vmalloc.h> + +#include "cxusb.h" + +static int cxusb_medion_v_queue_setup(struct vb2_queue *q, + unsigned int *num_buffers, + unsigned int *num_planes, + unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct dvb_usb_device *dvbdev = vb2_get_drv_priv(q); + struct cxusb_medion_dev *cxdev = dvbdev->priv; + unsigned int size = cxdev->width * cxdev->height * 2; + + if (*num_planes > 0) { + if (*num_planes != 1) + return -EINVAL; + + if (sizes[0] < size) + return -EINVAL; + } else { + *num_planes = 1; + sizes[0] = size; + } + + return 0; +} + +static int cxusb_medion_v_buf_init(struct vb2_buffer *vb) +{ + struct dvb_usb_device *dvbdev = vb2_get_drv_priv(vb->vb2_queue); + struct cxusb_medion_dev *cxdev = dvbdev->priv; + + cxusb_vprintk(dvbdev, OPS, "buffer init\n"); + + if (vb2_plane_size(vb, 0) < cxdev->width * cxdev->height * 2) + return -ENOMEM; + + cxusb_vprintk(dvbdev, OPS, "buffer OK\n"); + + return 0; +} + +static void cxusb_auxbuf_init(struct dvb_usb_device *dvbdev, + struct cxusb_medion_auxbuf *auxbuf, + u8 *buf, unsigned int len) +{ + cxusb_vprintk(dvbdev, AUXB, "initializing auxbuf of len %u\n", len); + + auxbuf->buf = buf; + auxbuf->len = len; + auxbuf->paylen = 0; +} + +static void cxusb_auxbuf_head_trim(struct dvb_usb_device *dvbdev, + struct cxusb_medion_auxbuf *auxbuf, + unsigned int pos) +{ + if (pos == 0) + return; + + if (WARN_ON(pos > auxbuf->paylen)) + return; + + cxusb_vprintk(dvbdev, AUXB, + "trimming auxbuf len by %u to %u\n", + pos, auxbuf->paylen - pos); + + memmove(auxbuf->buf, auxbuf->buf + pos, auxbuf->paylen - pos); + auxbuf->paylen -= pos; +} + +static unsigned int cxusb_auxbuf_paylen(struct cxusb_medion_auxbuf *auxbuf) +{ + return auxbuf->paylen; +} + +static bool cxusb_auxbuf_make_space(struct dvb_usb_device *dvbdev, + struct cxusb_medion_auxbuf *auxbuf, + unsigned int howmuch) +{ + unsigned int freespace; + + if (WARN_ON(howmuch >= auxbuf->len)) + howmuch = auxbuf->len - 1; + + freespace = auxbuf->len - cxusb_auxbuf_paylen(auxbuf); + + cxusb_vprintk(dvbdev, AUXB, "freespace is %u\n", freespace); + + if (freespace >= howmuch) + return true; + + howmuch -= freespace; + + cxusb_vprintk(dvbdev, AUXB, "will overwrite %u bytes of buffer\n", + howmuch); + + cxusb_auxbuf_head_trim(dvbdev, auxbuf, howmuch); + + return false; +} + +/* returns false if some data was overwritten */ +static bool cxusb_auxbuf_append_urb(struct dvb_usb_device *dvbdev, + struct cxusb_medion_auxbuf *auxbuf, + struct urb *urb) +{ + unsigned long len; + int i; + bool ret; + + for (i = 0, len = 0; i < urb->number_of_packets; i++) + len += urb->iso_frame_desc[i].actual_length; + + ret = cxusb_auxbuf_make_space(dvbdev, auxbuf, len); + + for (i = 0; i < urb->number_of_packets; i++) { + unsigned int to_copy; + + to_copy = urb->iso_frame_desc[i].actual_length; + + memcpy(auxbuf->buf + auxbuf->paylen, urb->transfer_buffer + + urb->iso_frame_desc[i].offset, to_copy); + + auxbuf->paylen += to_copy; + } + + return ret; +} + +static bool cxusb_auxbuf_copy(struct cxusb_medion_auxbuf *auxbuf, + unsigned int pos, unsigned char *dest, + unsigned int len) +{ + if (pos + len > auxbuf->paylen) + return false; + + memcpy(dest, auxbuf->buf + pos, len); + + return true; +} + +static bool cxusb_medion_cf_refc_fld_chg(struct dvb_usb_device *dvbdev, + struct cxusb_bt656_params *bt656, + bool firstfield, + unsigned int maxlines, + unsigned int maxlinesamples, + unsigned char buf[4]) +{ + bool firstfield_code = (buf[3] & CXUSB_BT656_FIELD_MASK) == + CXUSB_BT656_FIELD_1; + unsigned int remlines; + + if (bt656->line == 0 || firstfield == firstfield_code) + return false; + + if (bt656->fmode == LINE_SAMPLES) { + unsigned int remsamples = maxlinesamples - + bt656->linesamples; + + cxusb_vprintk(dvbdev, BT656, + "field %c after line %u field change\n", + firstfield ? '1' : '2', bt656->line); + + if (bt656->buf != NULL && remsamples > 0) { + memset(bt656->buf, 0, remsamples); + bt656->buf += remsamples; + + cxusb_vprintk(dvbdev, BT656, + "field %c line %u %u samples still remaining (of %u)\n", + firstfield ? '1' : '2', + bt656->line, remsamples, + maxlinesamples); + } + + bt656->line++; + } + + remlines = maxlines - bt656->line; + if (bt656->buf != NULL && remlines > 0) { + memset(bt656->buf, 0, remlines * maxlinesamples); + bt656->buf += remlines * maxlinesamples; + + cxusb_vprintk(dvbdev, BT656, + "field %c %u lines still remaining (of %u)\n", + firstfield ? '1' : '2', remlines, + maxlines); + } + + return true; +} + +static void cxusb_medion_cf_refc_start_sch(struct dvb_usb_device *dvbdev, + struct cxusb_bt656_params *bt656, + bool firstfield, + unsigned char buf[4]) +{ + bool firstfield_code = (buf[3] & CXUSB_BT656_FIELD_MASK) == + CXUSB_BT656_FIELD_1; + bool sav_code = (buf[3] & CXUSB_BT656_SEAV_MASK) == + CXUSB_BT656_SEAV_SAV; + bool vbi_code = (buf[3] & CXUSB_BT656_VBI_MASK) == + CXUSB_BT656_VBI_ON; + + if (!sav_code || firstfield != firstfield_code) + return; + + if (!vbi_code) { + cxusb_vprintk(dvbdev, BT656, "line start @ pos %u\n", + bt656->pos); + + bt656->linesamples = 0; + bt656->fmode = LINE_SAMPLES; + } else { + cxusb_vprintk(dvbdev, BT656, "VBI start @ pos %u\n", + bt656->pos); + + bt656->fmode = VBI_SAMPLES; + } +} + +static void cxusb_medion_cf_refc_line_smpl(struct dvb_usb_device *dvbdev, + struct cxusb_bt656_params *bt656, + bool firstfield, + unsigned int maxlinesamples, + unsigned char buf[4]) +{ + bool sav_code = (buf[3] & CXUSB_BT656_SEAV_MASK) == + CXUSB_BT656_SEAV_SAV; + unsigned int remsamples; + + if (sav_code) + cxusb_vprintk(dvbdev, BT656, + "SAV in line samples @ line %u, pos %u\n", + bt656->line, bt656->pos); + + remsamples = maxlinesamples - bt656->linesamples; + if (bt656->buf != NULL && remsamples > 0) { + memset(bt656->buf, 0, remsamples); + bt656->buf += remsamples; + + cxusb_vprintk(dvbdev, BT656, + "field %c line %u %u samples still remaining (of %u)\n", + firstfield ? '1' : '2', bt656->line, remsamples, + maxlinesamples); + } + + bt656->fmode = START_SEARCH; + bt656->line++; +} + +static void cxusb_medion_cf_refc_vbi_smpl(struct dvb_usb_device *dvbdev, + struct cxusb_bt656_params *bt656, + unsigned char buf[4]) +{ + bool sav_code = (buf[3] & CXUSB_BT656_SEAV_MASK) == + CXUSB_BT656_SEAV_SAV; + + if (sav_code) + cxusb_vprintk(dvbdev, BT656, "SAV in VBI samples @ pos %u\n", + bt656->pos); + + bt656->fmode = START_SEARCH; +} + +/* returns whether the whole 4-byte code should be skipped in the buffer */ +static bool cxusb_medion_cf_ref_code(struct dvb_usb_device *dvbdev, + struct cxusb_bt656_params *bt656, + bool firstfield, + unsigned int maxlines, + unsigned int maxlinesamples, + unsigned char buf[4]) +{ + if (bt656->fmode == START_SEARCH) + cxusb_medion_cf_refc_start_sch(dvbdev, bt656, firstfield, buf); + else if (bt656->fmode == LINE_SAMPLES) { + cxusb_medion_cf_refc_line_smpl(dvbdev, bt656, firstfield, + maxlinesamples, buf); + return false; + } else if (bt656->fmode == VBI_SAMPLES) { + cxusb_medion_cf_refc_vbi_smpl(dvbdev, bt656, buf); + return false; + } + + return true; +} + +static bool cxusb_medion_cs_start_sch(struct dvb_usb_device *dvbdev, + struct cxusb_medion_auxbuf *auxbuf, + struct cxusb_bt656_params *bt656, + unsigned int maxlinesamples) +{ + unsigned char buf[64]; + unsigned int idx; + unsigned int tocheck = clamp_t(size_t, maxlinesamples / 4, 3, + sizeof(buf)); + + if (!cxusb_auxbuf_copy(auxbuf, bt656->pos + 1, buf, tocheck)) + return false; + + for (idx = 0; idx <= tocheck - 3; idx++) + if (memcmp(buf + idx, CXUSB_BT656_PREAMBLE, 3) == 0) { + bt656->pos += (1 + idx); + return true; + } + + cxusb_vprintk(dvbdev, BT656, "line %u early start, pos %u\n", + bt656->line, bt656->pos); + + bt656->linesamples = 0; + bt656->fmode = LINE_SAMPLES; + + return true; +} + +static void cxusb_medion_cs_line_smpl(struct cxusb_bt656_params *bt656, + unsigned int maxlinesamples, + unsigned char val) +{ + if (bt656->buf != NULL) + *(bt656->buf++) = val; + + bt656->linesamples++; + bt656->pos++; + + if (bt656->linesamples >= maxlinesamples) { + bt656->fmode = START_SEARCH; + bt656->line++; + } +} + +static bool cxusb_medion_copy_samples(struct dvb_usb_device *dvbdev, + struct cxusb_medion_auxbuf *auxbuf, + struct cxusb_bt656_params *bt656, + unsigned int maxlinesamples, + unsigned char val) +{ + if (bt656->fmode == START_SEARCH && bt656->line > 0) + return cxusb_medion_cs_start_sch(dvbdev, auxbuf, bt656, + maxlinesamples); + else if (bt656->fmode == LINE_SAMPLES) + cxusb_medion_cs_line_smpl(bt656, maxlinesamples, val); + else /* TODO: copy VBI samples */ + bt656->pos++; + + return true; +} + +static bool cxusb_medion_copy_field(struct dvb_usb_device *dvbdev, + struct cxusb_medion_auxbuf *auxbuf, + struct cxusb_bt656_params *bt656, + bool firstfield, + unsigned int maxlines, + unsigned int maxlinesmpls) +{ + while (bt656->line < maxlines) { + unsigned char val; + + if (!cxusb_auxbuf_copy(auxbuf, bt656->pos, &val, 1)) + break; + + if (val == CXUSB_BT656_PREAMBLE[0]) { + unsigned char buf[4]; + + buf[0] = val; + if (!cxusb_auxbuf_copy(auxbuf, bt656->pos + 1, + buf + 1, 3)) + break; + + if (buf[1] == CXUSB_BT656_PREAMBLE[1] && + buf[2] == CXUSB_BT656_PREAMBLE[2]) { + /* + * is this a field change? + * if so, terminate copying the current field + */ + if (cxusb_medion_cf_refc_fld_chg(dvbdev, + bt656, + firstfield, + maxlines, + maxlinesmpls, + buf)) + return true; + + if (cxusb_medion_cf_ref_code(dvbdev, bt656, + firstfield, + maxlines, + maxlinesmpls, + buf)) + bt656->pos += 4; + + continue; + } + } + + if (!cxusb_medion_copy_samples(dvbdev, auxbuf, bt656, + maxlinesmpls, val)) + break; + } + + if (bt656->line < maxlines) { + cxusb_vprintk(dvbdev, BT656, + "end of buffer pos = %u, line = %u\n", + bt656->pos, bt656->line); + return false; + } + + return true; +} + +static bool cxusb_medion_v_process_auxbuf(struct cxusb_medion_dev *cxdev, + bool reset) +{ + struct dvb_usb_device *dvbdev = cxdev->dvbdev; + struct cxusb_bt656_params *bt656 = &cxdev->bt656; + + /* + * if this is a new frame + * fetch a buffer from list + */ + if (bt656->mode == NEW_FRAME) { + if (!list_empty(&cxdev->buflist)) { + cxdev->vbuf = + list_first_entry(&cxdev->buflist, + struct cxusb_medion_vbuffer, + list); + list_del(&cxdev->vbuf->list); + } else + dev_warn(&dvbdev->udev->dev, "no free buffers\n"); + } + + if (bt656->mode == NEW_FRAME || reset) { + cxusb_vprintk(dvbdev, URB, "will copy field 1\n"); + bt656->pos = 0; + bt656->mode = FIRST_FIELD; + bt656->fmode = START_SEARCH; + bt656->line = 0; + + if (cxdev->vbuf != NULL) { + cxdev->vbuf->vb2.vb2_buf.timestamp = ktime_get_ns(); + bt656->buf = vb2_plane_vaddr(&cxdev->vbuf->vb2.vb2_buf, + 0); + } + } + + if (bt656->mode == FIRST_FIELD) { + if (!cxusb_medion_copy_field(dvbdev, &cxdev->auxbuf, bt656, + true, cxdev->height / 2, + cxdev->width * 2)) + return false; + + /* + * do not trim buffer there in case + * we need to reset the search later + */ + + cxusb_vprintk(dvbdev, URB, "will copy field 2\n"); + bt656->mode = SECOND_FIELD; + bt656->fmode = START_SEARCH; + bt656->line = 0; + } + + if (bt656->mode == SECOND_FIELD) { + if (!cxusb_medion_copy_field(dvbdev, &cxdev->auxbuf, bt656, + false, cxdev->height / 2, + cxdev->width * 2)) + return false; + + cxusb_auxbuf_head_trim(dvbdev, &cxdev->auxbuf, bt656->pos); + + bt656->mode = NEW_FRAME; + + if (cxdev->vbuf != NULL) { + vb2_set_plane_payload(&cxdev->vbuf->vb2.vb2_buf, 0, + cxdev->width * cxdev->height * 2); + + cxdev->vbuf->vb2.field = cxdev->field_order; + cxdev->vbuf->vb2.sequence = cxdev->vbuf_sequence++; + + vb2_buffer_done(&cxdev->vbuf->vb2.vb2_buf, + VB2_BUF_STATE_DONE); + + cxdev->vbuf = NULL; + cxdev->bt656.buf = NULL; + + cxusb_vprintk(dvbdev, URB, "frame done\n"); + } else { + cxusb_vprintk(dvbdev, URB, "frame skipped\n"); + cxdev->vbuf_sequence++; + } + } + + return true; +} + +static bool cxusb_medion_v_complete_handle_urb(struct cxusb_medion_dev *cxdev, + bool *auxbuf_reset) +{ + struct dvb_usb_device *dvbdev = cxdev->dvbdev; + unsigned int urbn; + struct urb *urb; + int ret; + + *auxbuf_reset = false; + + urbn = cxdev->nexturb; + if (!test_bit(urbn, &cxdev->urbcomplete)) + return false; + + clear_bit(urbn, &cxdev->urbcomplete); + + do { + cxdev->nexturb++; + cxdev->nexturb %= CXUSB_VIDEO_URBS; + urb = cxdev->streamurbs[cxdev->nexturb]; + } while (urb == NULL); + + urb = cxdev->streamurbs[urbn]; + cxusb_vprintk(dvbdev, URB, "URB %u status = %d\n", urbn, urb->status); + + if (urb->status == 0 || urb->status == -EXDEV) { + int i; + unsigned long len; + + for (i = 0, len = 0; i < urb->number_of_packets; i++) + len += urb->iso_frame_desc[i].actual_length; + + cxusb_vprintk(dvbdev, URB, "URB %u data len = %lu\n", urbn, + len); + + if (len > 0) { + cxusb_vprintk(dvbdev, URB, "appending URB\n"); + + /* + * append new data to auxbuf while + * overwriting old data if necessary + * + * if any overwrite happens then we can no + * longer rely on consistency of the whole + * data so let's start again the current + * auxbuf frame assembling process from + * the beginning + */ + *auxbuf_reset = + !cxusb_auxbuf_append_urb(dvbdev, + &cxdev->auxbuf, + urb); + } + } + + cxusb_vprintk(dvbdev, URB, "URB %u resubmit\n", urbn); + + ret = usb_submit_urb(urb, GFP_KERNEL); + if (ret != 0) + dev_err(&dvbdev->udev->dev, + "unable to resubmit URB %u (%d), you'll have to restart streaming\n", + urbn, ret); + + /* next URB is complete already? reschedule us then to handle it */ + return test_bit(cxdev->nexturb, &cxdev->urbcomplete); +} + +static void cxusb_medion_v_complete_work(struct work_struct *work) +{ + struct cxusb_medion_dev *cxdev = container_of(work, + struct cxusb_medion_dev, + urbwork); + struct dvb_usb_device *dvbdev = cxdev->dvbdev; + bool auxbuf_reset; + bool reschedule; + + mutex_lock(cxdev->videodev->lock); + + cxusb_vprintk(dvbdev, URB, "worker called, stop_streaming = %d\n", + (int)cxdev->stop_streaming); + + if (cxdev->stop_streaming) + goto unlock; + + reschedule = cxusb_medion_v_complete_handle_urb(cxdev, &auxbuf_reset); + + if (cxusb_medion_v_process_auxbuf(cxdev, auxbuf_reset)) + /* reschedule us until auxbuf no longer can produce any frame */ + reschedule = true; + + if (reschedule) { + cxusb_vprintk(dvbdev, URB, "rescheduling worker\n"); + schedule_work(&cxdev->urbwork); + } + +unlock: + mutex_unlock(cxdev->videodev->lock); +} + +static void cxusb_medion_v_complete(struct urb *u) +{ + struct dvb_usb_device *dvbdev = u->context; + struct cxusb_medion_dev *cxdev = dvbdev->priv; + unsigned int i; + + for (i = 0; i < CXUSB_VIDEO_URBS; i++) + if (cxdev->streamurbs[i] == u) + break; + + if (i >= CXUSB_VIDEO_URBS) { + dev_err(&dvbdev->udev->dev, + "complete on unknown URB\n"); + return; + } + + cxusb_vprintk(dvbdev, URB, "URB %u complete\n", i); + + set_bit(i, &cxdev->urbcomplete); + schedule_work(&cxdev->urbwork); +} + +static void cxusb_medion_urbs_free(struct cxusb_medion_dev *cxdev) +{ + unsigned int i; + + for (i = 0; i < CXUSB_VIDEO_URBS; i++) + if (cxdev->streamurbs[i] != NULL) { + kfree(cxdev->streamurbs[i]->transfer_buffer); + usb_free_urb(cxdev->streamurbs[i]); + cxdev->streamurbs[i] = NULL; + } +} + +static void cxusb_medion_return_buffers(struct cxusb_medion_dev *cxdev, + bool requeue) +{ + struct cxusb_medion_vbuffer *vbuf, *vbuf_tmp; + + list_for_each_entry_safe(vbuf, vbuf_tmp, &cxdev->buflist, + list) { + list_del(&vbuf->list); + vb2_buffer_done(&vbuf->vb2.vb2_buf, + requeue ? VB2_BUF_STATE_QUEUED : + VB2_BUF_STATE_ERROR); + } + + if (cxdev->vbuf != NULL) { + vb2_buffer_done(&cxdev->vbuf->vb2.vb2_buf, + requeue ? VB2_BUF_STATE_QUEUED : + VB2_BUF_STATE_ERROR); + + cxdev->vbuf = NULL; + cxdev->bt656.buf = NULL; + } +} + +static int cxusb_medion_v_ss_auxbuf_alloc(struct cxusb_medion_dev *cxdev, + int *npackets) +{ + struct dvb_usb_device *dvbdev = cxdev->dvbdev; + u8 *buf; + unsigned int framelen, urblen, auxbuflen; + + framelen = (cxdev->width * 2 + 4 + 4) * + (cxdev->height + 50 /* VBI lines */); + + /* + * try to fit a whole frame into each URB, as long as doing so + * does not require very high order memory allocations + */ + BUILD_BUG_ON(CXUSB_VIDEO_URB_MAX_SIZE / CXUSB_VIDEO_PKT_SIZE > + CXUSB_VIDEO_MAX_FRAME_PKTS); + *npackets = min_t(int, (framelen + CXUSB_VIDEO_PKT_SIZE - 1) / + CXUSB_VIDEO_PKT_SIZE, + CXUSB_VIDEO_URB_MAX_SIZE / CXUSB_VIDEO_PKT_SIZE); + urblen = *npackets * CXUSB_VIDEO_PKT_SIZE; + + cxusb_vprintk(dvbdev, URB, + "each URB will have %d packets for total of %u bytes (%u x %u @ %u)\n", + *npackets, urblen, (unsigned int)cxdev->width, + (unsigned int)cxdev->height, framelen); + + auxbuflen = framelen + urblen; + + buf = vmalloc(auxbuflen); + if (buf == NULL) + return -ENOMEM; + + cxusb_auxbuf_init(dvbdev, &cxdev->auxbuf, buf, auxbuflen); + + return 0; +} + +static u32 cxusb_medion_norm2field_order(v4l2_std_id norm) +{ + bool is625 = norm & V4L2_STD_625_50; + bool is525 = norm & V4L2_STD_525_60; + + if (!is625 && !is525) + return V4L2_FIELD_NONE; + + if (is625 && is525) + return V4L2_FIELD_NONE; + + if (is625) + return V4L2_FIELD_SEQ_TB; + else /* is525 */ + return V4L2_FIELD_SEQ_BT; +} + +static u32 cxusb_medion_field_order(struct cxusb_medion_dev *cxdev) +{ + struct dvb_usb_device *dvbdev = cxdev->dvbdev; + u32 field; + int ret; + v4l2_std_id norm; + + /* TV tuner is PAL-only so it is always TB */ + if (cxdev->input == 0) + return V4L2_FIELD_SEQ_TB; + + field = cxusb_medion_norm2field_order(cxdev->norm); + if (field != V4L2_FIELD_NONE) + return field; + + ret = v4l2_subdev_call(cxdev->cx25840, video, g_std, &norm); + if (ret != 0) + cxusb_vprintk(dvbdev, OPS, + "cannot get current standard for input %u\n", + (unsigned int)cxdev->input); + else { + field = cxusb_medion_norm2field_order(norm); + if (field != V4L2_FIELD_NONE) + return field; + } + + dev_warn(&dvbdev->udev->dev, + "cannot determine field order for the current standard setup and received signal, using TB\n"); + return V4L2_FIELD_SEQ_TB; +} + +static int cxusb_medion_v_start_streaming(struct vb2_queue *q, + unsigned int count) +{ + struct dvb_usb_device *dvbdev = vb2_get_drv_priv(q); + struct cxusb_medion_dev *cxdev = dvbdev->priv; + u8 streamon_params[2] = { 0x03, 0x00 }; + int npackets, i; + int ret; + + cxusb_vprintk(dvbdev, OPS, "should start streaming\n"); + + if (cxdev->stop_streaming) { + /* stream is being stopped */ + ret = -EBUSY; + goto ret_retbufs; + } + + cxdev->field_order = cxusb_medion_field_order(cxdev); + + ret = v4l2_subdev_call(cxdev->cx25840, video, s_stream, 1); + if (ret != 0) { + dev_err(&dvbdev->udev->dev, + "unable to start stream (%d)\n", ret); + goto ret_retbufs; + } + + ret = cxusb_ctrl_msg(dvbdev, CMD_STREAMING_ON, streamon_params, 2, + NULL, 0); + if (ret != 0) { + dev_err(&dvbdev->udev->dev, + "unable to start streaming (%d)\n", ret); + goto ret_unstream_cx; + } + + ret = cxusb_medion_v_ss_auxbuf_alloc(cxdev, &npackets); + if (ret != 0) + goto ret_unstream_md; + + for (i = 0; i < CXUSB_VIDEO_URBS; i++) { + int framen; + u8 *streambuf; + struct urb *surb; + + /* + * TODO: change this to an array of single pages to avoid + * doing a large continuous allocation when (if) + * s-g isochronous USB transfers are supported + */ + streambuf = kmalloc(npackets * CXUSB_VIDEO_PKT_SIZE, + GFP_KERNEL); + if (streambuf == NULL) { + if (i < 2) { + ret = -ENOMEM; + goto ret_freeab; + } else + break; + } + + surb = usb_alloc_urb(npackets, GFP_KERNEL); + if (surb == NULL) { + kfree(streambuf); + ret = -ENOMEM; + goto ret_freeu; + } + + cxdev->streamurbs[i] = surb; + surb->dev = dvbdev->udev; + surb->context = dvbdev; + surb->pipe = usb_rcvisocpipe(dvbdev->udev, 2); + + surb->interval = 1; + surb->transfer_flags = URB_ISO_ASAP; + + surb->transfer_buffer = streambuf; + + surb->complete = cxusb_medion_v_complete; + surb->number_of_packets = npackets; + surb->transfer_buffer_length = npackets * CXUSB_VIDEO_PKT_SIZE; + + for (framen = 0; framen < npackets; framen++) { + surb->iso_frame_desc[framen].offset = + CXUSB_VIDEO_PKT_SIZE * framen; + + surb->iso_frame_desc[framen].length = + CXUSB_VIDEO_PKT_SIZE; + } + } + + cxdev->urbcomplete = 0; + cxdev->nexturb = 0; + cxdev->vbuf_sequence = 0; + + cxdev->vbuf = NULL; + cxdev->bt656.mode = NEW_FRAME; + cxdev->bt656.buf = NULL; + + for (i = 0; i < CXUSB_VIDEO_URBS; i++) + if (cxdev->streamurbs[i] != NULL) { + ret = usb_submit_urb(cxdev->streamurbs[i], + GFP_KERNEL); + if (ret != 0) + dev_err(&dvbdev->udev->dev, + "URB %d submission failed (%d)\n", i, + ret); + } + + return 0; + +ret_freeu: + cxusb_medion_urbs_free(cxdev); + +ret_freeab: + vfree(cxdev->auxbuf.buf); + +ret_unstream_md: + cxusb_ctrl_msg(dvbdev, CMD_STREAMING_OFF, NULL, 0, NULL, 0); + +ret_unstream_cx: + v4l2_subdev_call(cxdev->cx25840, video, s_stream, 0); + +ret_retbufs: + cxusb_medion_return_buffers(cxdev, true); + + return ret; +} + +static void cxusb_medion_v_stop_streaming(struct vb2_queue *q) +{ + struct dvb_usb_device *dvbdev = vb2_get_drv_priv(q); + struct cxusb_medion_dev *cxdev = dvbdev->priv; + int ret; + unsigned int i; + + cxusb_vprintk(dvbdev, OPS, "should stop streaming\n"); + + if (WARN_ON(cxdev->stop_streaming)) + return; + + cxdev->stop_streaming = true; + + cxusb_ctrl_msg(dvbdev, CMD_STREAMING_OFF, NULL, 0, NULL, 0); + + ret = v4l2_subdev_call(cxdev->cx25840, video, s_stream, 0); + if (ret != 0) + dev_err(&dvbdev->udev->dev, "unable to stop stream (%d)\n", + ret); + + /* let URB completion run */ + mutex_unlock(cxdev->videodev->lock); + + for (i = 0; i < CXUSB_VIDEO_URBS; i++) + if (cxdev->streamurbs[i] != NULL) + usb_kill_urb(cxdev->streamurbs[i]); + + flush_work(&cxdev->urbwork); + + mutex_lock(cxdev->videodev->lock); + + /* free transfer buffer and URB */ + vfree(cxdev->auxbuf.buf); + + cxusb_medion_urbs_free(cxdev); + + cxusb_medion_return_buffers(cxdev, false); + + cxdev->stop_streaming = false; +} + +static void cxusub_medion_v_buf_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *v4l2buf = to_vb2_v4l2_buffer(vb); + struct cxusb_medion_vbuffer *vbuf = + container_of(v4l2buf, struct cxusb_medion_vbuffer, vb2); + struct dvb_usb_device *dvbdev = vb2_get_drv_priv(vb->vb2_queue); + struct cxusb_medion_dev *cxdev = dvbdev->priv; + + /* cxusb_vprintk(dvbdev, OPS, "mmmm.. a fresh buffer...\n"); */ + + list_add_tail(&vbuf->list, &cxdev->buflist); +} + +static const struct vb2_ops cxdev_video_qops = { + .queue_setup = cxusb_medion_v_queue_setup, + .buf_init = cxusb_medion_v_buf_init, + .start_streaming = cxusb_medion_v_start_streaming, + .stop_streaming = cxusb_medion_v_stop_streaming, + .buf_queue = cxusub_medion_v_buf_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish +}; + +static const __u32 videocaps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TUNER | + V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; +static const __u32 radiocaps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; + +static int cxusb_medion_v_querycap(struct file *file, void *fh, + struct v4l2_capability *cap) +{ + struct dvb_usb_device *dvbdev = video_drvdata(file); + + strscpy(cap->driver, dvbdev->udev->dev.driver->name, + sizeof(cap->driver)); + strscpy(cap->card, "Medion 95700", sizeof(cap->card)); + usb_make_path(dvbdev->udev, cap->bus_info, sizeof(cap->bus_info)); + + cap->capabilities = videocaps | radiocaps | V4L2_CAP_DEVICE_CAPS; + + return 0; +} + +static int cxusb_medion_v_enum_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_fmtdesc *f) +{ + if (f->index != 0) + return -EINVAL; + + f->pixelformat = V4L2_PIX_FMT_UYVY; + + return 0; +} + +static int cxusb_medion_g_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct dvb_usb_device *dvbdev = video_drvdata(file); + struct cxusb_medion_dev *cxdev = dvbdev->priv; + + f->fmt.pix.width = cxdev->width; + f->fmt.pix.height = cxdev->height; + f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; + f->fmt.pix.field = vb2_start_streaming_called(&cxdev->videoqueue) ? + cxdev->field_order : cxusb_medion_field_order(cxdev); + f->fmt.pix.bytesperline = cxdev->width * 2; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height; + + return 0; +} + +static int cxusb_medion_try_s_fmt_vid_cap(struct file *file, + struct v4l2_format *f, + bool isset) +{ + struct dvb_usb_device *dvbdev = video_drvdata(file); + struct cxusb_medion_dev *cxdev = dvbdev->priv; + struct v4l2_subdev_format subfmt; + u32 field; + int ret; + + if (isset && vb2_is_busy(&cxdev->videoqueue)) + return -EBUSY; + + field = vb2_start_streaming_called(&cxdev->videoqueue) ? + cxdev->field_order : cxusb_medion_field_order(cxdev); + + memset(&subfmt, 0, sizeof(subfmt)); + subfmt.which = isset ? V4L2_SUBDEV_FORMAT_ACTIVE : + V4L2_SUBDEV_FORMAT_TRY; + subfmt.format.width = f->fmt.pix.width & ~1; + subfmt.format.height = f->fmt.pix.height & ~1; + subfmt.format.code = MEDIA_BUS_FMT_FIXED; + subfmt.format.field = field; + subfmt.format.colorspace = V4L2_COLORSPACE_SMPTE170M; + + ret = v4l2_subdev_call(cxdev->cx25840, pad, set_fmt, NULL, &subfmt); + if (ret != 0) + return ret; + + f->fmt.pix.width = subfmt.format.width; + f->fmt.pix.height = subfmt.format.height; + f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; + f->fmt.pix.field = field; + f->fmt.pix.bytesperline = f->fmt.pix.width * 2; + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + + if (isset) { + cxdev->width = f->fmt.pix.width; + cxdev->height = f->fmt.pix.height; + } + + return 0; +} + +static int cxusb_medion_try_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + return cxusb_medion_try_s_fmt_vid_cap(file, f, false); +} + +static int cxusb_medion_s_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + return cxusb_medion_try_s_fmt_vid_cap(file, f, true); +} + +static const struct { + struct v4l2_input input; + u32 inputcfg; +} cxusb_medion_inputs[] = { + { .input = { .name = "TV tuner", .type = V4L2_INPUT_TYPE_TUNER, + .tuner = 0, .std = V4L2_STD_PAL }, + .inputcfg = CX25840_COMPOSITE2, }, + + { .input = { .name = "Composite", .type = V4L2_INPUT_TYPE_CAMERA, + .std = V4L2_STD_ALL }, + .inputcfg = CX25840_COMPOSITE1, }, + + { .input = { .name = "S-Video", .type = V4L2_INPUT_TYPE_CAMERA, + .std = V4L2_STD_ALL }, + |