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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [acpi/] [fan.c] - Blame information for rev 1765

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/*
 *  acpi_fan.c - ACPI Fan Driver ($Revision: 1.1.1.1 $)
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.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.,
 *  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/compatmac.h>
#include <linux/proc_fs.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
 
 
#define _COMPONENT              ACPI_FAN_COMPONENT
ACPI_MODULE_NAME                ("acpi_fan")
 
MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION(ACPI_FAN_DRIVER_NAME);
MODULE_LICENSE("GPL");
 
#define PREFIX                  "ACPI: "
 
 
int acpi_fan_add (struct acpi_device *device);
int acpi_fan_remove (struct acpi_device *device, int type);
 
static struct acpi_driver acpi_fan_driver = {
        .name =         ACPI_FAN_DRIVER_NAME,
        .class =        ACPI_FAN_CLASS,
        .ids =          ACPI_FAN_HID,
        .ops =          {
                                .add =          acpi_fan_add,
                                .remove =       acpi_fan_remove,
                        },
};
 
struct acpi_fan {
        acpi_handle             handle;
};
 
 
/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */
 
struct proc_dir_entry           *acpi_fan_dir;
 
 
static int
acpi_fan_read_state (
        char                    *page,
        char                    **start,
        off_t                   off,
        int                     count,
        int                     *eof,
        void                    *data)
{
        struct acpi_fan         *fan = (struct acpi_fan *) data;
        char                    *p = page;
        int                     len = 0;
        int                     state = 0;
 
        ACPI_FUNCTION_TRACE("acpi_fan_read_state");
 
        if (!fan || (off != 0))
                goto end;
 
        if (acpi_bus_get_power(fan->handle, &state))
                goto end;
 
        p += sprintf(p, "status:                  %s\n",
                !state?"on":"off");
 
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_VALUE(len);
}
 
 
static int
acpi_fan_write_state (
        struct file             *file,
        const char              *buffer,
        unsigned long           count,
        void                    *data)
{
        int                     result = 0;
        struct acpi_fan         *fan = (struct acpi_fan *) data;
        char                    state_string[12] = {'\0'};
 
        ACPI_FUNCTION_TRACE("acpi_fan_write_state");
 
        if (!fan || (count > sizeof(state_string) - 1))
                return_VALUE(-EINVAL);
 
        if (copy_from_user(state_string, buffer, count))
                return_VALUE(-EFAULT);
 
        state_string[count] = '\0';
 
        result = acpi_bus_set_power(fan->handle,
                simple_strtoul(state_string, NULL, 0));
        if (result)
                return_VALUE(result);
 
        return_VALUE(count);
}
 
 
static int
acpi_fan_add_fs (
        struct acpi_device      *device)
{
        struct proc_dir_entry   *entry = NULL;
 
        ACPI_FUNCTION_TRACE("acpi_fan_add_fs");
 
        if (!device)
                return_VALUE(-EINVAL);
 
        if (!acpi_device_dir(device)) {
                acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
                        acpi_fan_dir);
                if (!acpi_device_dir(device))
                        return_VALUE(-ENODEV);
        }
 
        /* 'status' [R/W] */
        entry = create_proc_entry(ACPI_FAN_FILE_STATE,
                S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
        if (!entry)
                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                        "Unable to create '%s' fs entry\n",
                        ACPI_FAN_FILE_STATE));
        else {
                entry->read_proc = acpi_fan_read_state;
                entry->write_proc = acpi_fan_write_state;
                entry->data = acpi_driver_data(device);
        }
 
        return_VALUE(0);
}
 
 
static int
acpi_fan_remove_fs (
        struct acpi_device      *device)
{
        ACPI_FUNCTION_TRACE("acpi_fan_remove_fs");
 
        if (acpi_device_dir(device)) {
                remove_proc_entry(acpi_device_bid(device), acpi_fan_dir);
                acpi_device_dir(device) = NULL;
        }
 
        return_VALUE(0);
}
 
 
/* --------------------------------------------------------------------------
                                 Driver Interface
   -------------------------------------------------------------------------- */
 
int
acpi_fan_add (
        struct acpi_device      *device)
{
        int                     result = 0;
        struct acpi_fan         *fan = NULL;
        int                     state = 0;
 
        ACPI_FUNCTION_TRACE("acpi_fan_add");
 
        if (!device)
                return_VALUE(-EINVAL);
 
        fan = kmalloc(sizeof(struct acpi_fan), GFP_KERNEL);
        if (!fan)
                return_VALUE(-ENOMEM);
        memset(fan, 0, sizeof(struct acpi_fan));
 
        fan->handle = device->handle;
        sprintf(acpi_device_name(device), "%s", ACPI_FAN_DEVICE_NAME);
        sprintf(acpi_device_class(device), "%s", ACPI_FAN_CLASS);
        acpi_driver_data(device) = fan;
 
        result = acpi_bus_get_power(fan->handle, &state);
        if (result) {
                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                        "Error reading power state\n"));
                goto end;
        }
 
        result = acpi_fan_add_fs(device);
        if (result)
                goto end;
 
        printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
                acpi_device_name(device), acpi_device_bid(device),
                !device->power.state?"on":"off");
 
end:
        if (result)
                kfree(fan);
 
        return_VALUE(result);
}
 
 
int
acpi_fan_remove (
        struct acpi_device      *device,
        int                     type)
{
        struct acpi_fan         *fan = NULL;
 
        ACPI_FUNCTION_TRACE("acpi_fan_remove");
 
        if (!device || !acpi_driver_data(device))
                return_VALUE(-EINVAL);
 
        fan = (struct acpi_fan *) acpi_driver_data(device);
 
        acpi_fan_remove_fs(device);
 
        kfree(fan);
 
        return_VALUE(0);
}
 
 
int __init
acpi_fan_init (void)
{
        int                     result = 0;
 
        ACPI_FUNCTION_TRACE("acpi_fan_init");
 
        acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir);
        if (!acpi_fan_dir)
                return_VALUE(-ENODEV);
 
        result = acpi_bus_register_driver(&acpi_fan_driver);
        if (result < 0) {
                remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
                return_VALUE(-ENODEV);
        }
 
        return_VALUE(0);
}
 
 
void __exit
acpi_fan_exit (void)
{
        ACPI_FUNCTION_TRACE("acpi_fan_exit");
 
        acpi_bus_unregister_driver(&acpi_fan_driver);
 
        remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
 
        return_VOID;
}
 
 
module_init(acpi_fan_init);
module_exit(acpi_fan_exit);
 

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [acpi/] [fan.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* acpi_fan.c - ACPI Fan Driver ($Revision: 1.1.1.1 $)`
3			`*`
4			`* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>`
5			`* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>`
6			`*`
7			`* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
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 (at`
12			`* your option) any later version.`
13			`*`
14			`* This program is distributed in the hope that it will be useful, but`
15			`* WITHOUT ANY WARRANTY; without even the implied warranty of`
16			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
17			`* General Public License for more details.`
18			`*`
19			`* You should have received a copy of the GNU General Public License along`
20			`* with this program; if not, write to the Free Software Foundation, Inc.,`
21			`* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.`
22			`*`
23			`* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
24			`*/`
25
26			`#include <linux/kernel.h>`
27			`#include <linux/module.h>`
28			`#include <linux/init.h>`
29			`#include <linux/types.h>`
30			`#include <linux/compatmac.h>`
31			`#include <linux/proc_fs.h>`
32			`#include <acpi/acpi_bus.h>`
33			`#include <acpi/acpi_drivers.h>`
34
35
36			`#define _COMPONENT ACPI_FAN_COMPONENT`
37			`ACPI_MODULE_NAME ("acpi_fan")`
38
39			`MODULE_AUTHOR("Paul Diefenbaugh");`
40			`MODULE_DESCRIPTION(ACPI_FAN_DRIVER_NAME);`
41			`MODULE_LICENSE("GPL");`
42
43			`#define PREFIX "ACPI: "`
44
45
46			`int acpi_fan_add (struct acpi_device *device);`
47			`int acpi_fan_remove (struct acpi_device *device, int type);`
48
49			`static struct acpi_driver acpi_fan_driver = {`
50			`.name = ACPI_FAN_DRIVER_NAME,`
51			`.class = ACPI_FAN_CLASS,`
52			`.ids = ACPI_FAN_HID,`
53			`.ops = {`
54			`.add = acpi_fan_add,`
55			`.remove = acpi_fan_remove,`
56			`},`
57			`};`
58
59			`struct acpi_fan {`
60			`acpi_handle handle;`
61			`};`
62
63
64			`/* --------------------------------------------------------------------------`
65			`FS Interface (/proc)`
66			`-------------------------------------------------------------------------- */`
67
68			`struct proc_dir_entry *acpi_fan_dir;`
69
70
71			`static int`
72			`acpi_fan_read_state (`
73			`char *page,`
74			`char **start,`
75			`off_t off,`
76			`int count,`
77			`int *eof,`
78			`void *data)`
79			`{`
80			`struct acpi_fan fan = (struct acpi_fan ) data;`
81			`char *p = page;`
82			`int len = 0;`
83			`int state = 0;`
84
85			`ACPI_FUNCTION_TRACE("acpi_fan_read_state");`
86
87			`if (!fan \|\| (off != 0))`
88			`goto end;`
89
90			`if (acpi_bus_get_power(fan->handle, &state))`
91			`goto end;`
92
93			`p += sprintf(p, "status: %s\n",`
94			`!state?"on":"off");`
95
96			`end:`
97			`len = (p - page);`
98			`if (len <= off+count) *eof = 1;`
99			`*start = page + off;`
100			`len -= off;`
101			`if (len>count) len = count;`
102			`if (len<0) len = 0;`
103
104			`return_VALUE(len);`
105			`}`
106
107
108			`static int`
109			`acpi_fan_write_state (`
110			`struct file *file,`
111			`const char *buffer,`
112			`unsigned long count,`
113			`void *data)`
114			`{`
115			`int result = 0;`
116			`struct acpi_fan fan = (struct acpi_fan ) data;`
117			`char state_string[12] = {'\0'};`
118
119			`ACPI_FUNCTION_TRACE("acpi_fan_write_state");`
120
121			`if (!fan \|\| (count > sizeof(state_string) - 1))`
122			`return_VALUE(-EINVAL);`
123
124			`if (copy_from_user(state_string, buffer, count))`
125			`return_VALUE(-EFAULT);`
126
127			`state_string[count] = '\0';`
128
129			`result = acpi_bus_set_power(fan->handle,`
130			`simple_strtoul(state_string, NULL, 0));`
131			`if (result)`
132			`return_VALUE(result);`
133
134			`return_VALUE(count);`
135			`}`
136
137
138			`static int`
139			`acpi_fan_add_fs (`
140			`struct acpi_device *device)`
141			`{`
142			`struct proc_dir_entry *entry = NULL;`
143
144			`ACPI_FUNCTION_TRACE("acpi_fan_add_fs");`
145
146			`if (!device)`
147			`return_VALUE(-EINVAL);`
148
149			`if (!acpi_device_dir(device)) {`
150			`acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),`
151			`acpi_fan_dir);`
152			`if (!acpi_device_dir(device))`
153			`return_VALUE(-ENODEV);`
154			`}`
155
156			`/* 'status' [R/W] */`
157			`entry = create_proc_entry(ACPI_FAN_FILE_STATE,`
158			`S_IFREG\|S_IRUGO\|S_IWUSR, acpi_device_dir(device));`
159			`if (!entry)`
160			`ACPI_DEBUG_PRINT((ACPI_DB_ERROR,`
161			`"Unable to create '%s' fs entry\n",`
162			`ACPI_FAN_FILE_STATE));`
163			`else {`
164			`entry->read_proc = acpi_fan_read_state;`
165			`entry->write_proc = acpi_fan_write_state;`
166			`entry->data = acpi_driver_data(device);`
167			`}`
168
169			`return_VALUE(0);`
170			`}`
171
172
173			`static int`
174			`acpi_fan_remove_fs (`
175			`struct acpi_device *device)`
176			`{`
177			`ACPI_FUNCTION_TRACE("acpi_fan_remove_fs");`
178
179			`if (acpi_device_dir(device)) {`
180			`remove_proc_entry(acpi_device_bid(device), acpi_fan_dir);`
181			`acpi_device_dir(device) = NULL;`
182			`}`
183
184			`return_VALUE(0);`
185			`}`
186
187
188			`/* --------------------------------------------------------------------------`
189			`Driver Interface`
190			`-------------------------------------------------------------------------- */`
191
192			`int`
193			`acpi_fan_add (`
194			`struct acpi_device *device)`
195			`{`
196			`int result = 0;`
197			`struct acpi_fan *fan = NULL;`
198			`int state = 0;`
199
200			`ACPI_FUNCTION_TRACE("acpi_fan_add");`
201
202			`if (!device)`
203			`return_VALUE(-EINVAL);`
204
205			`fan = kmalloc(sizeof(struct acpi_fan), GFP_KERNEL);`
206			`if (!fan)`
207			`return_VALUE(-ENOMEM);`
208			`memset(fan, 0, sizeof(struct acpi_fan));`
209
210			`fan->handle = device->handle;`
211			`sprintf(acpi_device_name(device), "%s", ACPI_FAN_DEVICE_NAME);`
212			`sprintf(acpi_device_class(device), "%s", ACPI_FAN_CLASS);`
213			`acpi_driver_data(device) = fan;`
214
215			`result = acpi_bus_get_power(fan->handle, &state);`
216			`if (result) {`
217			`ACPI_DEBUG_PRINT((ACPI_DB_ERROR,`
218			`"Error reading power state\n"));`
219			`goto end;`
220			`}`
221
222			`result = acpi_fan_add_fs(device);`
223			`if (result)`
224			`goto end;`
225
226			`printk(KERN_INFO PREFIX "%s [%s] (%s)\n",`
227			`acpi_device_name(device), acpi_device_bid(device),`
228			`!device->power.state?"on":"off");`
229
230			`end:`
231			`if (result)`
232			`kfree(fan);`
233
234			`return_VALUE(result);`
235			`}`
236
237
238			`int`
239			`acpi_fan_remove (`
240			`struct acpi_device *device,`
241			`int type)`
242			`{`
243			`struct acpi_fan *fan = NULL;`
244
245			`ACPI_FUNCTION_TRACE("acpi_fan_remove");`
246
247			`if (!device \|\| !acpi_driver_data(device))`
248			`return_VALUE(-EINVAL);`
249
250			`fan = (struct acpi_fan *) acpi_driver_data(device);`
251
252			`acpi_fan_remove_fs(device);`
253
254			`kfree(fan);`
255
256			`return_VALUE(0);`
257			`}`
258
259
260			`int __init`
261			`acpi_fan_init (void)`
262			`{`
263			`int result = 0;`
264
265			`ACPI_FUNCTION_TRACE("acpi_fan_init");`
266
267			`acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir);`
268			`if (!acpi_fan_dir)`
269			`return_VALUE(-ENODEV);`
270
271			`result = acpi_bus_register_driver(&acpi_fan_driver);`
272			`if (result < 0) {`
273			`remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);`
274			`return_VALUE(-ENODEV);`
275			`}`
276
277			`return_VALUE(0);`
278			`}`
279
280
281			`void __exit`
282			`acpi_fan_exit (void)`
283			`{`
284			`ACPI_FUNCTION_TRACE("acpi_fan_exit");`
285
286			`acpi_bus_unregister_driver(&acpi_fan_driver);`
287
288			`remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);`
289
290			`return_VOID;`
291			`}`
292
293
294			`module_init(acpi_fan_init);`
295			`module_exit(acpi_fan_exit);`
296