diff options
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-tuner.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-tuner.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-tuner.c b/drivers/media/video/pvrusb2/pvrusb2-tuner.c new file mode 100644 index 000000000000..af9f246f8d3f --- /dev/null +++ b/drivers/media/video/pvrusb2/pvrusb2-tuner.c @@ -0,0 +1,122 @@ +/* + * + * $Id$ + * + * 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 + * + */ + +#include "pvrusb2.h" +#include "pvrusb2-util.h" +#include "pvrusb2-tuner.h" +#include "pvrusb2-hdw-internal.h" +#include "pvrusb2-debug.h" +#include <linux/videodev2.h> +#include <media/tuner.h> +#include <media/v4l2-common.h> + +struct pvr2_tuner_handler { + struct pvr2_hdw *hdw; + struct pvr2_i2c_client *client; + struct pvr2_i2c_handler i2c_handler; + int type_update_fl; +}; + + +static void set_type(struct pvr2_tuner_handler *ctxt) +{ + struct pvr2_hdw *hdw = ctxt->hdw; + struct tuner_setup setup; + pvr2_trace(PVR2_TRACE_CHIPS,"i2c tuner set_type(%d)",hdw->tuner_type); + if (((int)(hdw->tuner_type)) < 0) return; + + setup.addr = ADDR_UNSET; + setup.type = hdw->tuner_type; + setup.mode_mask = T_RADIO | T_ANALOG_TV; + /* We may really want mode_mask to be T_ANALOG_TV for now */ + pvr2_i2c_client_cmd(ctxt->client,TUNER_SET_TYPE_ADDR,&setup); + ctxt->type_update_fl = 0; +} + + +static int tuner_check(struct pvr2_tuner_handler *ctxt) +{ + struct pvr2_hdw *hdw = ctxt->hdw; + if (hdw->tuner_updated) ctxt->type_update_fl = !0; + return ctxt->type_update_fl != 0; +} + + +static void tuner_update(struct pvr2_tuner_handler *ctxt) +{ + if (ctxt->type_update_fl) set_type(ctxt); +} + + +static void pvr2_tuner_detach(struct pvr2_tuner_handler *ctxt) +{ + ctxt->client->handler = NULL; + kfree(ctxt); +} + + +static unsigned int pvr2_tuner_describe(struct pvr2_tuner_handler *ctxt,char *buf,unsigned int cnt) +{ + return scnprintf(buf,cnt,"handler: pvrusb2-tuner"); +} + + +const static struct pvr2_i2c_handler_functions tuner_funcs = { + .detach = (void (*)(void *))pvr2_tuner_detach, + .check = (int (*)(void *))tuner_check, + .update = (void (*)(void *))tuner_update, + .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_tuner_describe, +}; + + +int pvr2_i2c_tuner_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp) +{ + struct pvr2_tuner_handler *ctxt; + if (cp->handler) return 0; + + ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL); + if (!ctxt) return 0; + memset(ctxt,0,sizeof(*ctxt)); + + ctxt->i2c_handler.func_data = ctxt; + ctxt->i2c_handler.func_table = &tuner_funcs; + ctxt->type_update_fl = !0; + ctxt->client = cp; + ctxt->hdw = hdw; + cp->handler = &ctxt->i2c_handler; + pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x tuner 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: *** + */ |