1/* 2 * 3 * $Id: pvrusb2-tuner.c,v 1.1.1.1 2007/08/03 18:52:41 Exp $ 4 * 5 * Copyright (C) 2005 Mike Isely <isely@pobox.com> 6 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 23#include "pvrusb2.h" 24#include "pvrusb2-util.h" 25#include "pvrusb2-tuner.h" 26#include "pvrusb2-hdw-internal.h" 27#include "pvrusb2-debug.h" 28#include <linux/videodev2.h> 29#include <media/tuner.h> 30#include <media/v4l2-common.h> 31 32struct pvr2_tuner_handler { 33 struct pvr2_hdw *hdw; 34 struct pvr2_i2c_client *client; 35 struct pvr2_i2c_handler i2c_handler; 36 int type_update_fl; 37}; 38 39 40static void set_type(struct pvr2_tuner_handler *ctxt) 41{ 42 struct pvr2_hdw *hdw = ctxt->hdw; 43 struct tuner_setup setup; 44 pvr2_trace(PVR2_TRACE_CHIPS,"i2c tuner set_type(%d)",hdw->tuner_type); 45 if (((int)(hdw->tuner_type)) < 0) return; 46 47 setup.addr = ADDR_UNSET; 48 setup.type = hdw->tuner_type; 49 setup.mode_mask = T_RADIO | T_ANALOG_TV; 50 /* We may really want mode_mask to be T_ANALOG_TV for now */ 51 pvr2_i2c_client_cmd(ctxt->client,TUNER_SET_TYPE_ADDR,&setup); 52 ctxt->type_update_fl = 0; 53} 54 55 56static int tuner_check(struct pvr2_tuner_handler *ctxt) 57{ 58 struct pvr2_hdw *hdw = ctxt->hdw; 59 if (hdw->tuner_updated) ctxt->type_update_fl = !0; 60 return ctxt->type_update_fl != 0; 61} 62 63 64static void tuner_update(struct pvr2_tuner_handler *ctxt) 65{ 66 if (ctxt->type_update_fl) set_type(ctxt); 67} 68 69 70static void pvr2_tuner_detach(struct pvr2_tuner_handler *ctxt) 71{ 72 ctxt->client->handler = NULL; 73 kfree(ctxt); 74} 75 76 77static unsigned int pvr2_tuner_describe(struct pvr2_tuner_handler *ctxt,char *buf,unsigned int cnt) 78{ 79 return scnprintf(buf,cnt,"handler: pvrusb2-tuner"); 80} 81 82 83static const struct pvr2_i2c_handler_functions tuner_funcs = { 84 .detach = (void (*)(void *))pvr2_tuner_detach, 85 .check = (int (*)(void *))tuner_check, 86 .update = (void (*)(void *))tuner_update, 87 .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_tuner_describe, 88}; 89 90 91int pvr2_i2c_tuner_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp) 92{ 93 struct pvr2_tuner_handler *ctxt; 94 if (cp->handler) return 0; 95 96 ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL); 97 if (!ctxt) return 0; 98 99 ctxt->i2c_handler.func_data = ctxt; 100 ctxt->i2c_handler.func_table = &tuner_funcs; 101 ctxt->type_update_fl = !0; 102 ctxt->client = cp; 103 ctxt->hdw = hdw; 104 cp->handler = &ctxt->i2c_handler; 105 pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x tuner handler set up", 106 cp->client->addr); 107 return !0; 108} 109 110 111 112 113/* 114 Stuff for Emacs to see, in order to encourage consistent editing style: 115 *** Local Variables: *** 116 *** mode: c *** 117 *** fill-column: 70 *** 118 *** tab-width: 8 *** 119 *** c-basic-offset: 8 *** 120 *** End: *** 121 */ 122