| /* |
| * |
| * $Id$ |
| * |
| * 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 |
| wm8775. |
| |
| */ |
| |
| #include "pvrusb2-wm8775.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 <linux/errno.h> |
| #include <linux/slab.h> |
| |
| struct pvr2_v4l_wm8775 { |
| struct pvr2_i2c_handler handler; |
| struct pvr2_i2c_client *client; |
| struct pvr2_hdw *hdw; |
| unsigned long stale_mask; |
| }; |
| |
| |
| static void set_input(struct pvr2_v4l_wm8775 *ctxt) |
| { |
| struct v4l2_routing route; |
| struct pvr2_hdw *hdw = ctxt->hdw; |
| |
| memset(&route,0,sizeof(route)); |
| |
| switch(hdw->input_val) { |
| case PVR2_CVAL_INPUT_RADIO: |
| route.input = 1; |
| break; |
| default: |
| /* All other cases just use the second input */ |
| route.input = 2; |
| break; |
| } |
| pvr2_trace(PVR2_TRACE_CHIPS,"i2c wm8775 set_input(val=%d route=0x%x)", |
| hdw->input_val,route.input); |
| |
| pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route); |
| } |
| |
| static int check_input(struct pvr2_v4l_wm8775 *ctxt) |
| { |
| struct pvr2_hdw *hdw = ctxt->hdw; |
| return hdw->input_dirty != 0; |
| } |
| |
| |
| struct pvr2_v4l_wm8775_ops { |
| void (*update)(struct pvr2_v4l_wm8775 *); |
| int (*check)(struct pvr2_v4l_wm8775 *); |
| }; |
| |
| |
| static const struct pvr2_v4l_wm8775_ops wm8775_ops[] = { |
| { .update = set_input, .check = check_input}, |
| }; |
| |
| |
| static unsigned int wm8775_describe(struct pvr2_v4l_wm8775 *ctxt, |
| char *buf,unsigned int cnt) |
| { |
| return scnprintf(buf,cnt,"handler: pvrusb2-wm8775"); |
| } |
| |
| |
| static void wm8775_detach(struct pvr2_v4l_wm8775 *ctxt) |
| { |
| ctxt->client->handler = NULL; |
| kfree(ctxt); |
| } |
| |
| |
| static int wm8775_check(struct pvr2_v4l_wm8775 *ctxt) |
| { |
| unsigned long msk; |
| unsigned int idx; |
| |
| for (idx = 0; idx < sizeof(wm8775_ops)/sizeof(wm8775_ops[0]); |
| idx++) { |
| msk = 1 << idx; |
| if (ctxt->stale_mask & msk) continue; |
| if (wm8775_ops[idx].check(ctxt)) { |
| ctxt->stale_mask |= msk; |
| } |
| } |
| return ctxt->stale_mask != 0; |
| } |
| |
| |
| static void wm8775_update(struct pvr2_v4l_wm8775 *ctxt) |
| { |
| unsigned long msk; |
| unsigned int idx; |
| |
| for (idx = 0; idx < sizeof(wm8775_ops)/sizeof(wm8775_ops[0]); |
| idx++) { |
| msk = 1 << idx; |
| if (!(ctxt->stale_mask & msk)) continue; |
| ctxt->stale_mask &= ~msk; |
| wm8775_ops[idx].update(ctxt); |
| } |
| } |
| |
| |
| static const struct pvr2_i2c_handler_functions hfuncs = { |
| .detach = (void (*)(void *))wm8775_detach, |
| .check = (int (*)(void *))wm8775_check, |
| .update = (void (*)(void *))wm8775_update, |
| .describe = (unsigned int (*)(void *,char *,unsigned int))wm8775_describe, |
| }; |
| |
| |
| int pvr2_i2c_wm8775_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp) |
| { |
| struct pvr2_v4l_wm8775 *ctxt; |
| |
| if (cp->handler) 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->client = cp; |
| ctxt->hdw = hdw; |
| ctxt->stale_mask = (1 << (sizeof(wm8775_ops)/ |
| sizeof(wm8775_ops[0]))) - 1; |
| cp->handler = &ctxt->handler; |
| pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x wm8775 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: *** |
| */ |