patch-2.4.6 linux/drivers/acpi/ospm/system/sm_osl.c

• Lines: 345
• Date: Wed Jun 20 17:47:40 2001
• Orig file: v2.4.5/linux/drivers/acpi/ospm/system/sm_osl.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/ospm/system/sm_osl.c linux/drivers/acpi/ospm/system/sm_osl.c
@@ -0,0 +1,344 @@
+/******************************************************************************
+ *
+ * Module Name: sm_osl.c
+ *   $Revision: 10 $
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000, 2001 Andrew Grover
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/pm.h>
+#include <asm/uaccess.h>
+
+#include <acpi.h>
+#include "sm.h"
+
+
+MODULE_AUTHOR("Andrew Grover");
+MODULE_DESCRIPTION("ACPI Component Architecture (CA) - ACPI System Driver");
+
+
+#define SM_PROC_INFO		"info"
+#define SM_PROC_DSDT		"dsdt"
+
+extern struct proc_dir_entry	*bm_proc_root;
+struct proc_dir_entry		*sm_proc_root = NULL;
+static void 			(*sm_pm_power_off)(void) = NULL;
+
+static ssize_t sm_osl_read_dsdt(struct file *, char *, size_t, loff_t *);
+
+static struct file_operations proc_dsdt_operations = {
+	read:		sm_osl_read_dsdt,
+};
+
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	sm_osl_proc_read_info
+ *
+ ****************************************************************************/
+
+static int
+sm_osl_proc_read_info (
+	char			*page,
+	char			**start,
+	off_t			off,
+	int 			count,
+	int 			*eof,
+	void			*context)
+{
+	ACPI_STATUS		status = AE_OK;
+	SM_CONTEXT		*system = NULL;
+	char			*p = page;
+	int			len;
+	ACPI_SYSTEM_INFO	system_info;
+	ACPI_BUFFER		buffer;
+	u32			i = 0;
+
+	if (!context) {
+		goto end;
+	}
+
+	system = (SM_CONTEXT*)context;
+
+	/* don't get status more than once for a single proc read */
+	if (off != 0) {
+		goto end;
+	}
+
+	/*
+	 * Get ACPI CA Information.
+	 */
+	buffer.length  = sizeof(system_info);
+	buffer.pointer = &system_info;
+
+	status = acpi_get_system_info(&buffer);
+	if (ACPI_FAILURE(status)) {
+		p += sprintf(p, "ACPI-CA Version:         unknown\n");
+	}
+	else {
+		p += sprintf(p, "ACPI-CA Version:         %x\n", 
+			system_info.acpi_ca_version);
+	}
+
+	p += sprintf(p, "Sx States Supported:     ");
+	for (i=0; i<SM_MAX_SYSTEM_STATES; i++) {
+		if (system->states[i]) {
+			p += sprintf(p, "S%d ", i);
+		}
+	}
+	p += sprintf(p, "\n");
+
+end:
+	len = (p - page);
+	if (len <= off+count) *eof = 1;
+	*start = page + off;
+	len -= off;
+	if (len>count) len = count;
+	if (len<0) len = 0;
+
+	return(len);
+}
+
+/****************************************************************************
+ *
+ * FUNCTION:	sm_osl_read_dsdt
+ *
+ ****************************************************************************/
+
+static ssize_t
+sm_osl_read_dsdt(
+	struct file		*file, 
+	char			*buf, 
+	size_t			count, 
+	loff_t			*ppos)
+{
+	ACPI_BUFFER		acpi_buf;
+	void			*data;
+	size_t			size = 0;
+
+	acpi_buf.length = 0;
+	acpi_buf.pointer = NULL;
+
+
+	/* determine what buffer size we will need */
+	if (acpi_get_table(ACPI_TABLE_DSDT, 1, &acpi_buf) != AE_BUFFER_OVERFLOW) {
+		return 0;
+	}
+
+	acpi_buf.pointer = kmalloc(acpi_buf.length, GFP_KERNEL);
+	if (!acpi_buf.pointer) {
+		return -ENOMEM;
+	}
+
+	/* get the table for real */
+	if (!ACPI_SUCCESS(acpi_get_table(ACPI_TABLE_DSDT, 1, &acpi_buf))) {
+		kfree(acpi_buf.pointer);
+		return 0;
+	}
+
+	if (*ppos < acpi_buf.length) {
+		data = acpi_buf.pointer + file->f_pos;
+		size = acpi_buf.length - file->f_pos;
+		if (size > count)
+			size = count;
+		if (copy_to_user(buf, data, size)) {
+			kfree(acpi_buf.pointer);
+			return -EFAULT;
+		}
+	}
+
+	kfree(acpi_buf.pointer);
+
+	*ppos += size;
+
+	return size;
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	sm_osl_power_down
+ *
+ ****************************************************************************/
+
+void
+sm_osl_power_down (void)
+{
+	ACPI_STATUS		status = AE_OK;
+
+	/* Power down the system (S5 = soft off). */
+	status = acpi_enter_sleep_state(ACPI_STATE_S5);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	sm_osl_add_device
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+sm_osl_add_device(
+	SM_CONTEXT		*system)
+{
+	u32			i = 0;
+	struct proc_dir_entry	*bm_proc_dsdt;
+
+	if (!system) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	printk("ACPI: System firmware supports");
+	for (i=0; i<SM_MAX_SYSTEM_STATES; i++) {
+		if (system->states[i]) {
+			printk(" S%d", i);
+		}
+	}
+	printk("\n");
+
+	if (system->states[ACPI_STATE_S5]) {
+		sm_pm_power_off = pm_power_off;
+		pm_power_off = sm_osl_power_down; 
+	}
+
+	create_proc_read_entry(SM_PROC_INFO, S_IRUGO, 
+		sm_proc_root, sm_osl_proc_read_info, (void*)system);
+
+	/* 
+	 * This returns more than a page, so we need to use our own file ops,
+	 * not proc's generic ones
+	 */
+	bm_proc_dsdt = create_proc_entry(SM_PROC_DSDT, S_IRUSR, sm_proc_root);
+	if (bm_proc_dsdt) {
+		bm_proc_dsdt->proc_fops = &proc_dsdt_operations;
+	}
+
+	return(AE_OK);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	sm_osl_remove_device
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+sm_osl_remove_device (
+	SM_CONTEXT		*system)
+{
+	if (!system) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	remove_proc_entry(SM_PROC_INFO, sm_proc_root);
+	remove_proc_entry(SM_PROC_DSDT, sm_proc_root);
+
+	return(AE_OK);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	sm_osl_generate_event
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+sm_osl_generate_event (
+	u32			event,
+	SM_CONTEXT		*system)
+{
+	ACPI_STATUS		status = AE_OK;
+
+	if (!system) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	switch (event) {
+
+	default:
+		return(AE_BAD_PARAMETER);
+		break;
+	}
+
+	return(status);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	sm_osl_init
+ *
+ * PARAMETERS:	<none>
+ *
+ * RETURN:	0: Success
+ *
+ * DESCRIPTION: Module initialization.
+ *
+ ****************************************************************************/
+
+static int __init 
+sm_osl_init (void)
+{
+	ACPI_STATUS		status = AE_OK;
+
+	sm_proc_root = bm_proc_root;
+	if (!sm_proc_root) {
+		status = AE_ERROR;
+	}
+	else {
+		status = sm_initialize();
+	}
+
+	return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	sm_osl_cleanup
+ *
+ * PARAMETERS:	<none>
+ *
+ * RETURN:	<none>
+ *
+ * DESCRIPTION: Module cleanup.
+ *
+ ****************************************************************************/
+
+static void __exit 
+sm_osl_cleanup (void)
+{
+	sm_terminate();
+
+	return;
+}
+
+
+module_init(sm_osl_init);
+module_exit(sm_osl_cleanup);