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