/* * * $Id$ * * Copyright (C) 2005 Mike Isely * Copyright (C) 2004 Aurelien Alleaume * * 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 #include #include #include #include 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: // In radio mode, we mute the video, but point at one // spot just to stay consistent route.input = SAA7115_COMPOSITE5; 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 = NULL; ctxt->hdw->decoder_ctrl = NULL; 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 unsigned int decoder_describe(struct pvr2_v4l_decoder *ctxt,char *buf,unsigned int cnt) { return scnprintf(buf,cnt,"handler: pvrusb2-video-v4l"); } static const 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->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: *** */