1 files changed, 566 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c
new file mode 100644
index 000000000000..afb141b2027a
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-streams.c
@@ -0,0 +1,566 @@
+/*
+ *  cx18 init/start/stop/exit stream functions
+ *
+ *  Derived from ivtv-streams.c
+ *
+ *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ *  02111-1307  USA
+ */
+
+#include "cx18-driver.h"
+#include "cx18-fileops.h"
+#include "cx18-mailbox.h"
+#include "cx18-i2c.h"
+#include "cx18-queue.h"
+#include "cx18-ioctl.h"
+#include "cx18-streams.h"
+#include "cx18-cards.h"
+#include "cx18-scb.h"
+#include "cx18-av-core.h"
+#include "cx18-dvb.h"
+
+#define CX18_DSP0_INTERRUPT_MASK        0xd0004C
+
+static struct file_operations cx18_v4l2_enc_fops = {
+      .owner = THIS_MODULE,
+      .read = cx18_v4l2_read,
+      .open = cx18_v4l2_open,
+      .ioctl = cx18_v4l2_ioctl,
+      .release = cx18_v4l2_close,
+      .poll = cx18_v4l2_enc_poll,
+};
+
+/* offset from 0 to register ts v4l2 minors on */
+#define CX18_V4L2_ENC_TS_OFFSET   16
+/* offset from 0 to register pcm v4l2 minors on */
+#define CX18_V4L2_ENC_PCM_OFFSET  24
+/* offset from 0 to register yuv v4l2 minors on */
+#define CX18_V4L2_ENC_YUV_OFFSET  32
+
+static struct {
+        const char *name;
+        int vfl_type;
+        int minor_offset;
+        int dma;
+        enum v4l2_buf_type buf_type;
+        struct file_operations *fops;
+} cx18_stream_info[] = {
+        {       /* CX18_ENC_STREAM_TYPE_MPG */
+                "encoder MPEG",
+                VFL_TYPE_GRABBER, 0,
+                PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
+                &cx18_v4l2_enc_fops
+        },
+        {       /* CX18_ENC_STREAM_TYPE_TS */
+                "TS",
+                VFL_TYPE_GRABBER, -1,
+                PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
+                &cx18_v4l2_enc_fops
+        },
+        {       /* CX18_ENC_STREAM_TYPE_YUV */
+                "encoder YUV",
+                VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
+                PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
+                &cx18_v4l2_enc_fops
+        },
+        {       /* CX18_ENC_STREAM_TYPE_VBI */
+                "encoder VBI",
+                VFL_TYPE_VBI, 0,
+                PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
+                &cx18_v4l2_enc_fops
+        },
+        {       /* CX18_ENC_STREAM_TYPE_PCM */
+                "encoder PCM audio",
+                VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
+                PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
+                &cx18_v4l2_enc_fops
+        },
+        {       /* CX18_ENC_STREAM_TYPE_IDX */
+                "encoder IDX",
+                VFL_TYPE_GRABBER, -1,
+                PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
+                &cx18_v4l2_enc_fops
+        },
+        {       /* CX18_ENC_STREAM_TYPE_RAD */
+                "encoder radio",
+                VFL_TYPE_RADIO, 0,
+                PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
+                &cx18_v4l2_enc_fops
+        },
+};
+
+static void cx18_stream_init(struct cx18 *cx, int type)
+{
+        struct cx18_stream *s = &cx->streams[type];
+        struct video_device *dev = s->v4l2dev;
+        u32 max_size = cx->options.megabytes[type] * 1024 * 1024;
+
+        /* we need to keep v4l2dev, so restore it afterwards */
+        memset(s, 0, sizeof(*s));
+        s->v4l2dev = dev;
+
+        /* initialize cx18_stream fields */
+        s->cx = cx;
+        s->type = type;
+        s->name = cx18_stream_info[type].name;
+        s->handle = 0xffffffff;
+
+        s->dma = cx18_stream_info[type].dma;
+        s->buf_size = cx->stream_buf_size[type];
+        if (s->buf_size)
+                s->buffers = max_size / s->buf_size;
+        if (s->buffers > 63) {
+                /* Each stream has a maximum of 63 buffers,
+                   ensure we do not exceed that. */
+                s->buffers = 63;
+                s->buf_size = (max_size / s->buffers) & ~0xfff;
+        }
+        spin_lock_init(&s->qlock);
+        init_waitqueue_head(&s->waitq);
+        s->id = -1;
+        cx18_queue_init(&s->q_free);
+        cx18_queue_init(&s->q_full);
+        cx18_queue_init(&s->q_io);
+}
+
+static int cx18_prep_dev(struct cx18 *cx, int type)
+{
+        struct cx18_stream *s = &cx->streams[type];
+        u32 cap = cx->v4l2_cap;
+        int minor_offset = cx18_stream_info[type].minor_offset;
+        int minor;
+
+        /* These four fields are always initialized. If v4l2dev == NULL, then
+           this stream is not in use. In that case no other fields but these
+           four can be used. */
+        s->v4l2dev = NULL;
+        s->cx = cx;
+        s->type = type;
+        s->name = cx18_stream_info[type].name;
+
+        /* Check whether the radio is supported */
+        if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
+                return 0;
+
+        /* Check whether VBI is supported */
+        if (type == CX18_ENC_STREAM_TYPE_VBI &&
+            !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
+                return 0;
+
+        /* card number + user defined offset + device offset */
+        minor = cx->num + cx18_first_minor + minor_offset;
+
+        /* User explicitly selected 0 buffers for these streams, so don't
+           create them. */
+        if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
+            cx->options.megabytes[type] == 0) {
+                CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
+                return 0;
+        }
+
+        cx18_stream_init(cx, type);
+
+        if (minor_offset == -1)
+                return 0;
+
+        /* allocate and initialize the v4l2 video device structure */
+        s->v4l2dev = video_device_alloc();
+        if (s->v4l2dev == NULL) {
+                CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
+                                s->name);
+                return -ENOMEM;
+        }
+
+        s->v4l2dev->type =
+                VID_TYPE_CAPTURE | VID_TYPE_TUNER | VID_TYPE_TELETEXT |
+                VID_TYPE_CLIPPING | VID_TYPE_SCALES | VID_TYPE_MPEG_ENCODER;
+        snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18%d %s",
+                        cx->num, s->name);
+
+        s->v4l2dev->minor = minor;
+        s->v4l2dev->dev = &cx->dev->dev;
+        s->v4l2dev->fops = cx18_stream_info[type].fops;
+        s->v4l2dev->release = video_device_release;
+
+        return 0;
+}
+
+/* Initialize v4l2 variables and register v4l2 devices */
+int cx18_streams_setup(struct cx18 *cx)
+{
+        int type;
+
+        /* Setup V4L2 Devices */
+        for (type = 0; type < CX18_MAX_STREAMS; type++) {
+                /* Prepare device */
+                if (cx18_prep_dev(cx, type))
+                        break;
+
+                /* Allocate Stream */
+                if (cx18_stream_alloc(&cx->streams[type]))
+                        break;
+        }
+        if (type == CX18_MAX_STREAMS)
+                return 0;
+
+        /* One or more streams could not be initialized. Clean 'em all up. */
+        cx18_streams_cleanup(cx);
+        return -ENOMEM;
+}
+
+static int cx18_reg_dev(struct cx18 *cx, int type)
+{
+        struct cx18_stream *s = &cx->streams[type];
+        int vfl_type = cx18_stream_info[type].vfl_type;
+        int minor;
+
+        /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
+         * We need a VFL_TYPE_TS defined.
+         */
+        if (strcmp("TS", s->name) == 0) {
+                /* just return if no DVB is supported */
+                if ((cx->card->hw_all & CX18_HW_DVB) == 0)
+                        return 0;
+                if (cx18_dvb_register(s) < 0) {
+                        CX18_ERR("DVB failed to register\n");
+                        return -EINVAL;
+                }
+        }
+
+        if (s->v4l2dev == NULL)
+                return 0;
+
+        minor = s->v4l2dev->minor;
+
+        /* Register device. First try the desired minor, then any free one. */
+        if (video_register_device(s->v4l2dev, vfl_type, minor) &&
+                        video_register_device(s->v4l2dev, vfl_type, -1)) {
+                CX18_ERR("Couldn't register v4l2 device for %s minor %d\n",
+                        s->name, minor);
+                video_device_release(s->v4l2dev);
+                s->v4l2dev = NULL;
+                return -ENOMEM;
+        }
+        minor = s->v4l2dev->minor;
+
+        switch (vfl_type) {
+        case VFL_TYPE_GRABBER:
+                CX18_INFO("Registered device video%d for %s (%d MB)\n",
+                        minor, s->name, cx->options.megabytes[type]);
+                break;
+
+        case VFL_TYPE_RADIO:
+                CX18_INFO("Registered device radio%d for %s\n",
+                        minor - MINOR_VFL_TYPE_RADIO_MIN, s->name);
+                break;
+
+        case VFL_TYPE_VBI:
+                if (cx->options.megabytes[type])
+                        CX18_INFO("Registered device vbi%d for %s (%d MB)\n",
+                                minor - MINOR_VFL_TYPE_VBI_MIN,
+                                s->name, cx->options.megabytes[type]);
+                else
+                        CX18_INFO("Registered device vbi%d for %s\n",
+                                minor - MINOR_VFL_TYPE_VBI_MIN, s->name);
+                break;
+        }
+
+        return 0;
+}
+
+/* Register v4l2 devices */
+int cx18_streams_register(struct cx18 *cx)
+{
+        int type;
+        int err = 0;
+
+        /* Register V4L2 devices */
+        for (type = 0; type < CX18_MAX_STREAMS; type++)
+                err |= cx18_reg_dev(cx, type);
+
+        if (err == 0)
+                return 0;
+
+        /* One or more streams could not be initialized. Clean 'em all up. */
+        cx18_streams_cleanup(cx);
+        return -ENOMEM;
+}
+
+/* Unregister v4l2 devices */
+void cx18_streams_cleanup(struct cx18 *cx)
+{
+        struct video_device *vdev;
+        int type;
+
+        /* Teardown all streams */
+        for (type = 0; type < CX18_MAX_STREAMS; type++) {
+                if (cx->streams[type].dvb.enabled)
+                        cx18_dvb_unregister(&cx->streams[type]);
+
+                vdev = cx->streams[type].v4l2dev;
+
+                cx->streams[type].v4l2dev = NULL;
+                if (vdev == NULL)
+                        continue;
+
+                cx18_stream_free(&cx->streams[type]);
+
+                /* Unregister device */
+                video_unregister_device(vdev);
+        }
+}
+
+static void cx18_vbi_setup(struct cx18_stream *s)
+{
+        struct cx18 *cx = s->cx;
+        int raw = cx->vbi.sliced_in->service_set == 0;
+        u32 data[CX2341X_MBOX_MAX_DATA];
+        int lines;
+
+        if (cx->is_60hz) {
+                cx->vbi.count = 12;
+                cx->vbi.start[0] = 10;
+                cx->vbi.start[1] = 273;
+        } else {        /* PAL/SECAM */
+                cx->vbi.count = 18;
+                cx->vbi.start[0] = 6;
+                cx->vbi.start[1] = 318;
+        }
+
+        /* setup VBI registers */
+        cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
+
+        /* determine number of lines and total number of VBI bytes.
+           A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1
+           The '- 1' byte is probably an unused U or V byte. Or something...
+           A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
+           header, 42 data bytes + checksum (to be confirmed) */
+        if (raw) {
+                lines = cx->vbi.count * 2;
+        } else {
+                lines = cx->is_60hz ? 24 : 38;
+                if (cx->is_60hz)
+                        lines += 2;
+        }
+
+        cx->vbi.enc_size = lines *
+                (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
+
+        data[0] = s->handle;
+        /* Lines per field */
+        data[1] = (lines / 2) | ((lines / 2) << 16);
+        /* bytes per line */
+        data[2] = (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
+        /* Every X number of frames a VBI interrupt arrives
+           (frames as in 25 or 30 fps) */
+        data[3] = 1;
+        /* Setup VBI for the cx25840 digitizer */
+        if (raw) {
+                data[4] = 0x20602060;
+                data[5] = 0x30703070;
+        } else {
+                data[4] = 0xB0F0B0F0;
+                data[5] = 0xA0E0A0E0;
+        }
+
+        CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
+                        data[0], data[1], data[2], data[3], data[4], data[5]);
+
+        if (s->type == CX18_ENC_STREAM_TYPE_VBI)
+                cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
+}
+
+int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
+{
+        u32 data[MAX_MB_ARGUMENTS];
+        struct cx18 *cx = s->cx;
+        struct list_head *p;
+        int ts = 0;
+        int captype = 0;
+
+        if (s->v4l2dev == NULL && s->dvb.enabled == 0)
+                return -EINVAL;
+
+        CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
+
+        switch (s->type) {
+        case CX18_ENC_STREAM_TYPE_MPG:
+                captype = CAPTURE_CHANNEL_TYPE_MPEG;
+                cx->mpg_data_received = cx->vbi_data_inserted = 0;
+                cx->dualwatch_jiffies = jiffies;
+                cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
+                cx->search_pack_header = 0;
+                break;
+
+        case CX18_ENC_STREAM_TYPE_TS:
+                captype = CAPTURE_CHANNEL_TYPE_TS;
+                ts = 1;
+                break;
+        case CX18_ENC_STREAM_TYPE_YUV:
+                captype = CAPTURE_CHANNEL_TYPE_YUV;
+                break;
+        case CX18_ENC_STREAM_TYPE_PCM:
+                captype = CAPTURE_CHANNEL_TYPE_PCM;
+                break;
+        case CX18_ENC_STREAM_TYPE_VBI:
+                captype = cx->vbi.sliced_in->service_set ?
+                    CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_VBI;
+                cx->vbi.frame = 0;
+                cx->vbi.inserted_frame = 0;
+                memset(cx->vbi.sliced_mpeg_size,
+                        0, sizeof(cx->vbi.sliced_mpeg_size));
+                break;
+        default:
+                return -EINVAL;
+        }
+        s->buffers_stolen = 0;
+
+        /* mute/unmute video */
+        cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
+                  s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));
+
+        /* Clear Streamoff flags in case left from last capture */
+        clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
+
+        cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
+        s->handle = data[0];
+        cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
+
+        if (atomic_read(&cx->capturing) == 0 && !ts) {
+                /* Stuff from Windows, we don't know what it is */
+                cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
+                cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
+                cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
+                cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
+                cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);
+
+                cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
+                               s->handle, cx->digitizer, cx->digitizer);
+
+                /* Setup VBI */
+                if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
+                        cx18_vbi_setup(s);
+
+                /* assign program index info.
+                   Mask 7: select I/P/B, Num_req: 400 max */
+                cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
+
+                /* Setup API for Stream */
+                cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
+        }
+
+        if (atomic_read(&cx->capturing) == 0) {
+                clear_bit(CX18_F_I_EOS, &cx->i_flags);
+                write_reg(7, CX18_DSP0_INTERRUPT_MASK);
+        }
+
+        cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
+                (void *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
+                (void *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
+
+        list_for_each(p, &s->q_free.list) {
+                struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);
+
+                writel(buf->dma_handle, &cx->scb->cpu_mdl[buf->id].paddr);
+                writel(s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
+                cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
+                        (void *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem, 1,
+                        buf->id, s->buf_size);
+        }
+        /* begin_capture */
+        if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
+                CX18_DEBUG_WARN("Error starting capture!\n");
+                cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
+                return -EINVAL;
+        }
+
+        /* you're live! sit back and await interrupts :) */
+        atomic_inc(&cx->capturing);
+        return 0;
+}
+
+void cx18_stop_all_captures(struct cx18 *cx)
+{
+        int i;
+
+        for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
+                struct cx18_stream *s = &cx->streams[i];
+
+                if (s->v4l2dev == NULL && s->dvb.enabled == 0)
+                        continue;
+                if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
+                        cx18_stop_v4l2_encode_stream(s, 0);
+        }
+}
+
+int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
+{
+        struct cx18 *cx = s->cx;
+        unsigned long then;
+
+        if (s->v4l2dev == NULL && s->dvb.enabled == 0)
+                return -EINVAL;
+
+        /* This function assumes that you are allowed to stop the capture
+           and that we are actually capturing */
+
+        CX18_DEBUG_INFO("Stop Capture\n");
+
+        if (atomic_read(&cx->capturing) == 0)
+                return 0;
+
+        if (s->type == CX18_ENC_STREAM_TYPE_MPG)
+                cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
+        else
+                cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
+
+        then = jiffies;
+
+        if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
+                CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
+        }
+
+        atomic_dec(&cx->capturing);
+
+        /* Clear capture and no-read bits */
+        clear_bit(CX18_F_S_STREAMING, &s->s_flags);
+
+        cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
+        s->handle = 0xffffffff;
+
+        if (atomic_read(&cx->capturing) > 0)
+                return 0;
+
+        write_reg(5, CX18_DSP0_INTERRUPT_MASK);
+        wake_up(&s->waitq);
+
+        return 0;
+}
+
+u32 cx18_find_handle(struct cx18 *cx)
+{
+        int i;
+
+        /* find first available handle to be used for global settings */
+        for (i = 0; i < CX18_MAX_STREAMS; i++) {
+                struct cx18_stream *s = &cx->streams[i];
+
+                if (s->v4l2dev && s->handle)
+                        return s->handle;
+        }
+        return 0;
+}