sound/oss/cs4281/cs4281pm-24.c

   1 /*******************************************************************************
   2 *
   3 *      "cs4281pm.c" --  Cirrus Logic-Crystal CS4281 linux audio driver.
   4 *
   5 *      Copyright (C) 2000,2001  Cirrus Logic Corp.
   6 *            -- tom woller (twoller@crystal.cirrus.com) or
   7 *               (audio@crystal.cirrus.com).
   8 *
   9 *      This program is free software; you can redistribute it and/or modify
  10 *      it under the terms of the GNU General Public License as published by
  11 *      the Free Software Foundation; either version 2 of the License, or
  12 *      (at your option) any later version.
  13 *
  14 *      This program is distributed in the hope that it will be useful,
  15 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 *      GNU General Public License for more details.
  18 *
  19 *      You should have received a copy of the GNU General Public License
  20 *      along with this program; if not, write to the Free Software
  21 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 *
  23 * 12/22/00 trw - new file.
  24 *
  25 *******************************************************************************/
  26
  27 #ifndef NOT_CS4281_PM
  28 #include <linux/pm.h>
  29
  30 #define cs_pm_register(a, b, c) pm_register((a), (b), (c));
  31 #define cs_pm_unregister_all(a) pm_unregister_all((a));
  32
  33 static int cs4281_suspend(struct cs4281_state *s);
  34 static int cs4281_resume(struct cs4281_state *s);
  35 /*
  36 * for now (12/22/00) only enable the pm_register PM support.
  37 * allow these table entries to be null.
  38 #define CS4281_SUSPEND_TBL cs4281_suspend_tbl
  39 #define CS4281_RESUME_TBL cs4281_resume_tbl
  40 */
  41 #define CS4281_SUSPEND_TBL cs4281_suspend_null
  42 #define CS4281_RESUME_TBL cs4281_resume_null
  43
  44 static int cs4281_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
  45 {
  46         struct cs4281_state *state;
  47
  48         CS_DBGOUT(CS_PM, 2, printk(KERN_INFO
  49                 "cs4281: cs4281_pm_callback dev=%p rqst=0x%x state=%p\n",
  50                         dev,(unsigned)rqst,data));
  51         state = (struct cs4281_state *) dev->data;
  52         if (state) {
  53                 switch(rqst) {
  54                         case PM_SUSPEND:
  55                                 CS_DBGOUT(CS_PM, 2, printk(KERN_INFO
  56                                         "cs4281: PM suspend request\n"));
  57                                 if(cs4281_suspend(state))
  58                                 {
  59                                     CS_DBGOUT(CS_ERROR, 2, printk(KERN_INFO
  60                                         "cs4281: PM suspend request refused\n"));
  61                                         return 1;
  62                                 }
  63                                 break;
  64                         case PM_RESUME:
  65                                 CS_DBGOUT(CS_PM, 2, printk(KERN_INFO
  66                                         "cs4281: PM resume request\n"));
  67                                 if(cs4281_resume(state))
  68                                 {
  69                                     CS_DBGOUT(CS_ERROR, 2, printk(KERN_INFO
  70                                         "cs4281: PM resume request refused\n"));
  71                                         return 1;
  72                                 }
  73                                 break;
  74                 }
  75         }
  76
  77         return 0;
  78 }
  79
  80 #else /* CS4281_PM */
  81 #define CS4281_SUSPEND_TBL cs4281_suspend_null
  82 #define CS4281_RESUME_TBL cs4281_resume_null
  83 #endif /* CS4281_PM */
  84