/* * * $Id$ * * 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 < ARRAY_SIZE(wm8775_ops); 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 < ARRAY_SIZE(wm8775_ops); 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 = kzalloc(sizeof(*ctxt),GFP_KERNEL); if (!ctxt) return 0; ctxt->handler.func_data = ctxt; ctxt->handler.func_table = &hfuncs; ctxt->client = cp; ctxt->hdw = hdw; ctxt->stale_mask = (1 << ARRAY_SIZE(wm8775_ops)) - 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: *** */