patch-2.4.2 linux/drivers/sound/cs4281/cs4281pm-24.c

• Lines: 85
• Date: Sun Feb 4 10:05:29 2001
• Orig file: v2.4.1/linux/drivers/sound/cs4281/cs4281pm-24.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/drivers/sound/cs4281/cs4281pm-24.c linux/drivers/sound/cs4281/cs4281pm-24.c
@@ -0,0 +1,84 @@
+/*******************************************************************************
+*
+*      "cs4281pm.c" --  Cirrus Logic-Crystal CS4281 linux audio driver.
+*
+*      Copyright (C) 2000,2001  Cirrus Logic Corp.  
+*            -- tom woller (twoller@crystal.cirrus.com) or
+*               (audio@crystal.cirrus.com).
+*
+*      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, or
+*      (at your option) any later version.
+*
+*      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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*
+* 12/22/00 trw - new file. 
+*
+*******************************************************************************/
+
+#ifndef NOT_CS4281_PM
+#include <linux/pm.h>
+
+#define cs_pm_register(a, b, c) pm_register((a), (b), (c));
+#define cs_pm_unregister_all(a) pm_unregister_all((a));
+
+int cs4281_suspend(struct cs4281_state *s);
+int cs4281_resume(struct cs4281_state *s);
+/* 
+* for now (12/22/00) only enable the pm_register PM support.
+* allow these table entries to be null.
+#define CS4281_SUSPEND_TBL cs4281_suspend_tbl
+#define CS4281_RESUME_TBL cs4281_resume_tbl
+*/
+#define CS4281_SUSPEND_TBL cs4281_null
+#define CS4281_RESUME_TBL cs4281_null
+
+int cs4281_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
+{
+	struct cs4281_state *state;
+
+	CS_DBGOUT(CS_PM, 2, printk(KERN_INFO 
+		"cs4281: cs4281_pm_callback dev=0x%x rqst=0x%x state=%d\n",
+			(unsigned)dev,(unsigned)rqst,(unsigned)data));
+	state = (struct cs4281_state *) dev->data;
+	if (state) {
+		switch(rqst) {
+			case PM_SUSPEND:
+				CS_DBGOUT(CS_PM, 2, printk(KERN_INFO
+					"cs4281: PM suspend request\n"));
+				if(cs4281_suspend(state))
+				{
+				    CS_DBGOUT(CS_ERROR, 2, printk(KERN_INFO
+					"cs4281: PM suspend request refused\n"));
+					return 1; 
+				}
+				break;
+			case PM_RESUME:
+				CS_DBGOUT(CS_PM, 2, printk(KERN_INFO
+					"cs4281: PM resume request\n"));
+				if(cs4281_resume(state))
+				{
+				    CS_DBGOUT(CS_ERROR, 2, printk(KERN_INFO
+					"cs4281: PM resume request refused\n"));
+					return 1;
+				}
+				break;
+		}
+	}
+
+	return 0;
+}
+
+#else /* CS4281_PM */
+#define CS4281_SUSPEND_TBL cs4281_null
+#define CS4281_RESUME_TBL cs4281_null
+#endif /* CS4281_PM */
+