diff options
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-video-v4l.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-video-v4l.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-video-v4l.c b/drivers/media/video/pvrusb2/pvrusb2-video-v4l.c new file mode 100644 index 00000000000..e4ec7f25194 --- /dev/null +++ b/drivers/media/video/pvrusb2/pvrusb2-video-v4l.c @@ -0,0 +1,253 @@ +/* + * + * $Id$ + * + * Copyright (C) 2005 Mike Isely <isely@pobox.com> + * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr> + * + * 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 + * + * 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 + * + */ + +/* + + This source file is specifically designed to interface with the + saa711x support that is available in the v4l available starting + with linux 2.6.15. + +*/ + +#include "pvrusb2-video-v4l.h" +#include "pvrusb2-i2c-cmd-v4l2.h" + + +#include "pvrusb2-hdw-internal.h" +#include "pvrusb2-debug.h" +#include <linux/videodev2.h> +#include <media/v4l2-common.h> +#include <media/saa7115.h> +#include <linux/errno.h> +#include <linux/slab.h> + +struct pvr2_v4l_decoder { + struct pvr2_i2c_handler handler; + struct pvr2_decoder_ctrl ctrl; + struct pvr2_i2c_client *client; + struct pvr2_hdw *hdw; + unsigned long stale_mask; +}; + + +static void set_input(struct pvr2_v4l_decoder *ctxt) +{ + struct pvr2_hdw *hdw = ctxt->hdw; + struct v4l2_routing route; + + pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val); + switch(hdw->input_val) { + case PVR2_CVAL_INPUT_TV: + route.input = SAA7115_COMPOSITE4; + break; + case PVR2_CVAL_INPUT_COMPOSITE: + route.input = SAA7115_COMPOSITE5; + break; + case PVR2_CVAL_INPUT_SVIDEO: + route.input = SAA7115_SVIDEO2; + break; + case PVR2_CVAL_INPUT_RADIO: + // ????? No idea yet what to do here + default: + return; + } + route.output = 0; + pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route); +} + + +static int check_input(struct pvr2_v4l_decoder *ctxt) +{ + struct pvr2_hdw *hdw = ctxt->hdw; + return hdw->input_dirty != 0; +} + + +static void set_audio(struct pvr2_v4l_decoder *ctxt) +{ + u32 val; + struct pvr2_hdw *hdw = ctxt->hdw; + + pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_audio %d", + hdw->srate_val); + switch (hdw->srate_val) { + default: + case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000: + val = 48000; + break; + case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100: + val = 44100; + break; + case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000: + val = 32000; + break; + } + pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val); +} + + +static int check_audio(struct pvr2_v4l_decoder *ctxt) +{ + struct pvr2_hdw *hdw = ctxt->hdw; + return hdw->srate_dirty != 0; +} + + +struct pvr2_v4l_decoder_ops { + void (*update)(struct pvr2_v4l_decoder *); + int (*check)(struct pvr2_v4l_decoder *); +}; + + +static const struct pvr2_v4l_decoder_ops decoder_ops[] = { + { .update = set_input, .check = check_input}, + { .update = set_audio, .check = check_audio}, +}; + + +static void decoder_detach(struct pvr2_v4l_decoder *ctxt) +{ + ctxt->client->handler = 0; + ctxt->hdw->decoder_ctrl = 0; + kfree(ctxt); +} + + +static int decoder_check(struct pvr2_v4l_decoder *ctxt) +{ + unsigned long msk; + unsigned int idx; + + for (idx = 0; idx < sizeof(decoder_ops)/sizeof(decoder_ops[0]); + idx++) { + msk = 1 << idx; + if (ctxt->stale_mask & msk) continue; + if (decoder_ops[idx].check(ctxt)) { + ctxt->stale_mask |= msk; + } + } + return ctxt->stale_mask != 0; +} + + +static void decoder_update(struct pvr2_v4l_decoder *ctxt) +{ + unsigned long msk; + unsigned int idx; + + for (idx = 0; idx < sizeof(decoder_ops)/sizeof(decoder_ops[0]); + idx++) { + msk = 1 << idx; + if (!(ctxt->stale_mask & msk)) continue; + ctxt->stale_mask &= ~msk; + decoder_ops[idx].update(ctxt); + } +} + + +static int decoder_detect(struct pvr2_i2c_client *cp) +{ + /* Attempt to query the decoder - let's see if it will answer */ + struct v4l2_tuner vt; + int ret; + + memset(&vt,0,sizeof(vt)); + ret = pvr2_i2c_client_cmd(cp,VIDIOC_G_TUNER,&vt); + return ret == 0; /* Return true if it answered */ +} + + +static void decoder_enable(struct pvr2_v4l_decoder *ctxt,int fl) +{ + pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 decoder_enable(%d)",fl); + pvr2_v4l2_cmd_stream(ctxt->client,fl); +} + + +static int decoder_is_tuned(struct pvr2_v4l_decoder *ctxt) +{ + struct v4l2_tuner vt; + int ret; + + memset(&vt,0,sizeof(vt)); + ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_G_TUNER,&vt); + if (ret < 0) return -EINVAL; + return vt.signal ? 1 : 0; +} + + +static unsigned int decoder_describe(struct pvr2_v4l_decoder *ctxt,char *buf,unsigned int cnt) +{ + return scnprintf(buf,cnt,"handler: pvrusb2-video-v4l"); +} + + +const static struct pvr2_i2c_handler_functions hfuncs = { + .detach = (void (*)(void *))decoder_detach, + .check = (int (*)(void *))decoder_check, + .update = (void (*)(void *))decoder_update, + .describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe, +}; + + +int pvr2_i2c_decoder_v4l_setup(struct pvr2_hdw *hdw, + struct pvr2_i2c_client *cp) +{ + struct pvr2_v4l_decoder *ctxt; + + if (hdw->decoder_ctrl) return 0; + if (cp->handler) return 0; + if (!decoder_detect(cp)) return 0; + + ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL); + if (!ctxt) return 0; + memset(ctxt,0,sizeof(*ctxt)); + + ctxt->handler.func_data = ctxt; + ctxt->handler.func_table = &hfuncs; + ctxt->ctrl.ctxt = ctxt; + ctxt->ctrl.detach = (void (*)(void *))decoder_detach; + ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable; + ctxt->ctrl.tuned = (int (*)(void *))decoder_is_tuned; + ctxt->client = cp; + ctxt->hdw = hdw; + ctxt->stale_mask = (1 << (sizeof(decoder_ops)/ + sizeof(decoder_ops[0]))) - 1; + hdw->decoder_ctrl = &ctxt->ctrl; + cp->handler = &ctxt->handler; + pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x saa711x V4L2 handler set up", + cp->client->addr); + return !0; +} + + + + +/* + Stuff for Emacs to see, in order to encourage consistent editing style: + *** Local Variables: *** + *** mode: c *** + *** fill-column: 70 *** + *** tab-width: 8 *** + *** c-basic-offset: 8 *** + *** End: *** + */ |