5 * Copyright (C) 2005 Mike Isely <isely@pobox.com>
6 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
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
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.
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
25 This source file is specifically designed to interface with the
30 #include "pvrusb2-wm8775.h"
31 #include "pvrusb2-i2c-cmd-v4l2.h"
34 #include "pvrusb2-hdw-internal.h"
35 #include "pvrusb2-debug.h"
36 #include <linux/videodev2.h>
37 #include <media/v4l2-common.h>
38 #include <linux/errno.h>
39 #include <linux/slab.h>
41 struct pvr2_v4l_wm8775 {
42 struct pvr2_i2c_handler handler;
43 struct pvr2_i2c_client *client;
45 unsigned long stale_mask;
49 static void set_input(struct pvr2_v4l_wm8775 *ctxt)
51 struct v4l2_routing route;
52 struct pvr2_hdw *hdw = ctxt->hdw;
54 memset(&route,0,sizeof(route));
56 switch(hdw->input_val) {
57 case PVR2_CVAL_INPUT_RADIO:
61 /* All other cases just use the second input */
65 pvr2_trace(PVR2_TRACE_CHIPS,"i2c wm8775 set_input(val=%d route=0x%x)",
66 hdw->input_val,route.input);
68 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
71 static int check_input(struct pvr2_v4l_wm8775 *ctxt)
73 struct pvr2_hdw *hdw = ctxt->hdw;
74 return hdw->input_dirty != 0;
78 struct pvr2_v4l_wm8775_ops {
79 void (*update)(struct pvr2_v4l_wm8775 *);
80 int (*check)(struct pvr2_v4l_wm8775 *);
84 static const struct pvr2_v4l_wm8775_ops wm8775_ops[] = {
85 { .update = set_input, .check = check_input},
89 static unsigned int wm8775_describe(struct pvr2_v4l_wm8775 *ctxt,
90 char *buf,unsigned int cnt)
92 return scnprintf(buf,cnt,"handler: pvrusb2-wm8775");
96 static void wm8775_detach(struct pvr2_v4l_wm8775 *ctxt)
98 ctxt->client->handler = NULL;
103 static int wm8775_check(struct pvr2_v4l_wm8775 *ctxt)
108 for (idx = 0; idx < ARRAY_SIZE(wm8775_ops); idx++) {
110 if (ctxt->stale_mask & msk) continue;
111 if (wm8775_ops[idx].check(ctxt)) {
112 ctxt->stale_mask |= msk;
115 return ctxt->stale_mask != 0;
119 static void wm8775_update(struct pvr2_v4l_wm8775 *ctxt)
124 for (idx = 0; idx < ARRAY_SIZE(wm8775_ops); idx++) {
126 if (!(ctxt->stale_mask & msk)) continue;
127 ctxt->stale_mask &= ~msk;
128 wm8775_ops[idx].update(ctxt);
133 static const struct pvr2_i2c_handler_functions hfuncs = {
134 .detach = (void (*)(void *))wm8775_detach,
135 .check = (int (*)(void *))wm8775_check,
136 .update = (void (*)(void *))wm8775_update,
137 .describe = (unsigned int (*)(void *,char *,unsigned int))wm8775_describe,
141 int pvr2_i2c_wm8775_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
143 struct pvr2_v4l_wm8775 *ctxt;
145 if (cp->handler) return 0;
147 ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
150 ctxt->handler.func_data = ctxt;
151 ctxt->handler.func_table = &hfuncs;
154 ctxt->stale_mask = (1 << ARRAY_SIZE(wm8775_ops)) - 1;
155 cp->handler = &ctxt->handler;
156 pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x wm8775 V4L2 handler set up",
165 Stuff for Emacs to see, in order to encourage consistent editing style:
166 *** Local Variables: ***
168 *** fill-column: 70 ***
170 *** c-basic-offset: 8 ***