| 1 |
1275 |
phoenix |
/*
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i2c-proc.c - Part of lm_sensors, Linux kernel modules for hardware
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monitoring
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Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl> and
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Mark D. Studebaker <mdsxyz123@yahoo.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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This driver puts entries in /proc/sys/dev/sensors for each I2C device
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/ctype.h>
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#include <linux/sysctl.h>
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#include <linux/proc_fs.h>
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#include <linux/ioport.h>
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#include <asm/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/i2c-proc.h>
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#include <linux/init.h>
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#ifndef THIS_MODULE
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#define THIS_MODULE NULL
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#endif
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static int i2c_create_name(char **name, const char *prefix,
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struct i2c_adapter *adapter, int addr);
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static int i2c_parse_reals(int *nrels, void *buffer, int bufsize,
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long *results, int magnitude);
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static int i2c_write_reals(int nrels, void *buffer, int *bufsize,
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long *results, int magnitude);
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static int i2c_proc_chips(ctl_table * ctl, int write,
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struct file *filp, void *buffer,
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size_t * lenp);
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static int i2c_sysctl_chips(ctl_table * table, int *name, int nlen,
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void *oldval, size_t * oldlenp,
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void *newval, size_t newlen,
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void **context);
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int __init sensors_init(void);
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#define SENSORS_ENTRY_MAX 20
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static struct ctl_table_header *i2c_entries[SENSORS_ENTRY_MAX];
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static struct i2c_client *i2c_clients[SENSORS_ENTRY_MAX];
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static unsigned short i2c_inodes[SENSORS_ENTRY_MAX];
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static ctl_table sysctl_table[] = {
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{CTL_DEV, "dev", NULL, 0, 0555},
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{0},
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{DEV_SENSORS, "sensors", NULL, 0, 0555},
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{0},
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{0, NULL, NULL, 0, 0555},
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{0}
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};
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static ctl_table i2c_proc_dev_sensors[] = {
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{SENSORS_CHIPS, "chips", NULL, 0, 0644, NULL, &i2c_proc_chips,
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&i2c_sysctl_chips},
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{0}
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};
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static ctl_table i2c_proc_dev[] = {
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{DEV_SENSORS, "sensors", NULL, 0, 0555, i2c_proc_dev_sensors},
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{0},
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};
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static ctl_table i2c_proc[] = {
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{CTL_DEV, "dev", NULL, 0, 0555, i2c_proc_dev},
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{0}
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};
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static struct ctl_table_header *i2c_proc_header;
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static int i2c_initialized;
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/* This returns a nice name for a new directory; for example lm78-isa-0310
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(for a LM78 chip on the ISA bus at port 0x310), or lm75-i2c-3-4e (for
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a LM75 chip on the third i2c bus at address 0x4e).
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name is allocated first. */
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int i2c_create_name(char **name, const char *prefix,
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struct i2c_adapter *adapter, int addr)
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{
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char name_buffer[50];
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int id;
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if (i2c_is_isa_adapter(adapter))
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sprintf(name_buffer, "%s-isa-%04x", prefix, addr);
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else {
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if ((id = i2c_adapter_id(adapter)) < 0)
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return -ENOENT;
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sprintf(name_buffer, "%s-i2c-%d-%02x", prefix, id, addr);
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}
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*name = kmalloc(strlen(name_buffer) + 1, GFP_KERNEL);
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if (!*name) {
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printk (KERN_WARNING "i2c_create_name: not enough memory\n");
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return -ENOMEM;
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}
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strcpy(*name, name_buffer);
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return 0;
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}
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/* This rather complex function must be called when you want to add an entry
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to /proc/sys/dev/sensors/chips. It also creates a new directory within
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/proc/sys/dev/sensors/.
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ctl_template should be a template of the newly created directory. It is
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copied in memory. The extra2 field of each file is set to point to client.
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If any driver wants subdirectories within the newly created directory,
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this function must be updated!
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controlling_mod is the controlling module. It should usually be
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THIS_MODULE when calling. Note that this symbol is not defined in
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kernels before 2.3.13; define it to NULL in that case. We will not use it
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for anything older than 2.3.27 anyway. */
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int i2c_register_entry(struct i2c_client *client, const char *prefix,
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ctl_table * ctl_template,
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struct module *controlling_mod)
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{
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int i, res, len, id;
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ctl_table *new_table;
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char *name;
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struct ctl_table_header *new_header;
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if ((res = i2c_create_name(&name, prefix, client->adapter,
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client->addr))) return res;
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for (id = 0; id < SENSORS_ENTRY_MAX; id++)
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if (!i2c_entries[id]) {
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break;
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}
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if (id == SENSORS_ENTRY_MAX) {
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kfree(name);
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return -ENOMEM;
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}
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id += 256;
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len = 0;
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while (ctl_template[len].procname)
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len++;
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len += 7;
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if (!(new_table = kmalloc(sizeof(ctl_table) * len, GFP_KERNEL))) {
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kfree(name);
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return -ENOMEM;
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}
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memcpy(new_table, sysctl_table, 6 * sizeof(ctl_table));
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new_table[0].child = &new_table[2];
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new_table[2].child = &new_table[4];
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new_table[4].child = &new_table[6];
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new_table[4].procname = name;
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new_table[4].ctl_name = id;
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memcpy(new_table + 6, ctl_template, (len - 6) * sizeof(ctl_table));
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for (i = 6; i < len; i++)
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new_table[i].extra2 = client;
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if (!(new_header = register_sysctl_table(new_table, 0))) {
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kfree(new_table);
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kfree(name);
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return -ENOMEM;
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}
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i2c_entries[id - 256] = new_header;
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i2c_clients[id - 256] = client;
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#ifdef DEBUG
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if (!new_header || !new_header->ctl_table ||
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!new_header->ctl_table->child ||
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!new_header->ctl_table->child->child ||
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!new_header->ctl_table->child->child->de) {
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printk
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("i2c-proc.o: NULL pointer when trying to install fill_inode fix!\n");
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return id;
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}
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#endif /* DEBUG */
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i2c_inodes[id - 256] =
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new_header->ctl_table->child->child->de->low_ino;
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new_header->ctl_table->child->child->de->owner = controlling_mod;
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return id;
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}
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| 199 |
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void i2c_deregister_entry(int id)
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{
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ctl_table *table;
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char *temp;
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id -= 256;
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if (i2c_entries[id]) {
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table = i2c_entries[id]->ctl_table;
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unregister_sysctl_table(i2c_entries[id]);
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/* 2-step kfree needed to keep gcc happy about const points */
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(const char *) temp = table[4].procname;
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kfree(temp);
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kfree(table);
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i2c_entries[id] = NULL;
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i2c_clients[id] = NULL;
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| 213 |
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}
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| 214 |
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}
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| 215 |
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| 216 |
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/* Monitor access for /proc/sys/dev/sensors; make unloading i2c-proc.o
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| 217 |
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impossible if some process still uses it or some file in it */
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| 218 |
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void i2c_fill_inode(struct inode *inode, int fill)
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| 219 |
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{
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| 220 |
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if (fill)
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| 221 |
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MOD_INC_USE_COUNT;
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| 222 |
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else
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| 223 |
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MOD_DEC_USE_COUNT;
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| 224 |
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}
|
| 225 |
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| 226 |
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/* Monitor access for /proc/sys/dev/sensors/ directories; make unloading
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| 227 |
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the corresponding module impossible if some process still uses it or
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| 228 |
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some file in it */
|
| 229 |
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void i2c_dir_fill_inode(struct inode *inode, int fill)
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| 230 |
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{
|
| 231 |
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int i;
|
| 232 |
|
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struct i2c_client *client;
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| 233 |
|
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|
| 234 |
|
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#ifdef DEBUG
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| 235 |
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if (!inode) {
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| 236 |
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printk("i2c-proc.o: Warning: inode NULL in fill_inode()\n");
|
| 237 |
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return;
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| 238 |
|
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}
|
| 239 |
|
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#endif /* def DEBUG */
|
| 240 |
|
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|
| 241 |
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for (i = 0; i < SENSORS_ENTRY_MAX; i++)
|
| 242 |
|
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if (i2c_clients[i]
|
| 243 |
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&& (i2c_inodes[i] == inode->i_ino)) break;
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| 244 |
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#ifdef DEBUG
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| 245 |
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if (i == SENSORS_ENTRY_MAX) {
|
| 246 |
|
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printk
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| 247 |
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("i2c-proc.o: Warning: inode (%ld) not found in fill_inode()\n",
|
| 248 |
|
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inode->i_ino);
|
| 249 |
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return;
|
| 250 |
|
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}
|
| 251 |
|
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#endif /* def DEBUG */
|
| 252 |
|
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client = i2c_clients[i];
|
| 253 |
|
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if (fill)
|
| 254 |
|
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client->driver->inc_use(client);
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| 255 |
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else
|
| 256 |
|
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client->driver->dec_use(client);
|
| 257 |
|
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}
|
| 258 |
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|
| 259 |
|
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int i2c_proc_chips(ctl_table * ctl, int write, struct file *filp,
|
| 260 |
|
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void *buffer, size_t * lenp)
|
| 261 |
|
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{
|
| 262 |
|
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char BUF[SENSORS_PREFIX_MAX + 30];
|
| 263 |
|
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int buflen, curbufsize, i;
|
| 264 |
|
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struct ctl_table *client_tbl;
|
| 265 |
|
|
|
| 266 |
|
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if (write)
|
| 267 |
|
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return 0;
|
| 268 |
|
|
|
| 269 |
|
|
/* If buffer is size 0, or we try to read when not at the start, we
|
| 270 |
|
|
return nothing. Note that I think writing when not at the start
|
| 271 |
|
|
does not work either, but anyway, this is straight from the kernel
|
| 272 |
|
|
sources. */
|
| 273 |
|
|
if (!*lenp || (filp->f_pos && !write)) {
|
| 274 |
|
|
*lenp = 0;
|
| 275 |
|
|
return 0;
|
| 276 |
|
|
}
|
| 277 |
|
|
curbufsize = 0;
|
| 278 |
|
|
for (i = 0; i < SENSORS_ENTRY_MAX; i++)
|
| 279 |
|
|
if (i2c_entries[i]) {
|
| 280 |
|
|
client_tbl =
|
| 281 |
|
|
i2c_entries[i]->ctl_table->child->child;
|
| 282 |
|
|
buflen =
|
| 283 |
|
|
sprintf(BUF, "%d\t%s\n", client_tbl->ctl_name,
|
| 284 |
|
|
client_tbl->procname);
|
| 285 |
|
|
if (buflen + curbufsize > *lenp)
|
| 286 |
|
|
buflen = *lenp - curbufsize;
|
| 287 |
|
|
if(copy_to_user(buffer, BUF, buflen))
|
| 288 |
|
|
return -EFAULT;
|
| 289 |
|
|
curbufsize += buflen;
|
| 290 |
|
|
(char *) buffer += buflen;
|
| 291 |
|
|
}
|
| 292 |
|
|
*lenp = curbufsize;
|
| 293 |
|
|
filp->f_pos += curbufsize;
|
| 294 |
|
|
return 0;
|
| 295 |
|
|
}
|
| 296 |
|
|
|
| 297 |
|
|
int i2c_sysctl_chips(ctl_table * table, int *name, int nlen,
|
| 298 |
|
|
void *oldval, size_t * oldlenp, void *newval,
|
| 299 |
|
|
size_t newlen, void **context)
|
| 300 |
|
|
{
|
| 301 |
|
|
struct i2c_chips_data data;
|
| 302 |
|
|
int i, oldlen, nrels, maxels,ret=0;
|
| 303 |
|
|
struct ctl_table *client_tbl;
|
| 304 |
|
|
|
| 305 |
|
|
if (oldval && oldlenp && !((ret = get_user(oldlen, oldlenp))) &&
|
| 306 |
|
|
oldlen) {
|
| 307 |
|
|
maxels = oldlen / sizeof(struct i2c_chips_data);
|
| 308 |
|
|
nrels = 0;
|
| 309 |
|
|
for (i = 0; (i < SENSORS_ENTRY_MAX) && (nrels < maxels);
|
| 310 |
|
|
i++)
|
| 311 |
|
|
if (i2c_entries[i]) {
|
| 312 |
|
|
client_tbl =
|
| 313 |
|
|
i2c_entries[i]->ctl_table->child->
|
| 314 |
|
|
child;
|
| 315 |
|
|
data.sysctl_id = client_tbl->ctl_name;
|
| 316 |
|
|
strcpy(data.name, client_tbl->procname);
|
| 317 |
|
|
if(copy_to_user(oldval, &data,
|
| 318 |
|
|
sizeof(struct
|
| 319 |
|
|
i2c_chips_data)))
|
| 320 |
|
|
return -EFAULT;
|
| 321 |
|
|
(char *) oldval +=
|
| 322 |
|
|
sizeof(struct i2c_chips_data);
|
| 323 |
|
|
nrels++;
|
| 324 |
|
|
}
|
| 325 |
|
|
oldlen = nrels * sizeof(struct i2c_chips_data);
|
| 326 |
|
|
if(put_user(oldlen, oldlenp))
|
| 327 |
|
|
return -EFAULT;
|
| 328 |
|
|
}
|
| 329 |
|
|
return ret;
|
| 330 |
|
|
}
|
| 331 |
|
|
|
| 332 |
|
|
|
| 333 |
|
|
/* This funcion reads or writes a 'real' value (encoded by the combination
|
| 334 |
|
|
of an integer and a magnitude, the last is the power of ten the value
|
| 335 |
|
|
should be divided with) to a /proc/sys directory. To use this function,
|
| 336 |
|
|
you must (before registering the ctl_table) set the extra2 field to the
|
| 337 |
|
|
client, and the extra1 field to a function of the form:
|
| 338 |
|
|
void func(struct i2c_client *client, int operation, int ctl_name,
|
| 339 |
|
|
int *nrels_mag, long *results)
|
| 340 |
|
|
This function can be called for three values of operation. If operation
|
| 341 |
|
|
equals SENSORS_PROC_REAL_INFO, the magnitude should be returned in
|
| 342 |
|
|
nrels_mag. If operation equals SENSORS_PROC_REAL_READ, values should
|
| 343 |
|
|
be read into results. nrels_mag should return the number of elements
|
| 344 |
|
|
read; the maximum number is put in it on entry. Finally, if operation
|
| 345 |
|
|
equals SENSORS_PROC_REAL_WRITE, the values in results should be
|
| 346 |
|
|
written to the chip. nrels_mag contains on entry the number of elements
|
| 347 |
|
|
found.
|
| 348 |
|
|
In all cases, client points to the client we wish to interact with,
|
| 349 |
|
|
and ctl_name is the SYSCTL id of the file we are accessing. */
|
| 350 |
|
|
int i2c_proc_real(ctl_table * ctl, int write, struct file *filp,
|
| 351 |
|
|
void *buffer, size_t * lenp)
|
| 352 |
|
|
{
|
| 353 |
|
|
#define MAX_RESULTS 32
|
| 354 |
|
|
int mag, nrels = MAX_RESULTS;
|
| 355 |
|
|
long results[MAX_RESULTS];
|
| 356 |
|
|
i2c_real_callback callback = ctl->extra1;
|
| 357 |
|
|
struct i2c_client *client = ctl->extra2;
|
| 358 |
|
|
int res;
|
| 359 |
|
|
|
| 360 |
|
|
/* If buffer is size 0, or we try to read when not at the start, we
|
| 361 |
|
|
return nothing. Note that I think writing when not at the start
|
| 362 |
|
|
does not work either, but anyway, this is straight from the kernel
|
| 363 |
|
|
sources. */
|
| 364 |
|
|
if (!*lenp || (filp->f_pos && !write)) {
|
| 365 |
|
|
*lenp = 0;
|
| 366 |
|
|
return 0;
|
| 367 |
|
|
}
|
| 368 |
|
|
|
| 369 |
|
|
/* Get the magnitude */
|
| 370 |
|
|
callback(client, SENSORS_PROC_REAL_INFO, ctl->ctl_name, &mag,
|
| 371 |
|
|
NULL);
|
| 372 |
|
|
|
| 373 |
|
|
if (write) {
|
| 374 |
|
|
/* Read the complete input into results, converting to longs */
|
| 375 |
|
|
res = i2c_parse_reals(&nrels, buffer, *lenp, results, mag);
|
| 376 |
|
|
if (res)
|
| 377 |
|
|
return res;
|
| 378 |
|
|
|
| 379 |
|
|
if (!nrels)
|
| 380 |
|
|
return 0;
|
| 381 |
|
|
|
| 382 |
|
|
/* Now feed this information back to the client */
|
| 383 |
|
|
callback(client, SENSORS_PROC_REAL_WRITE, ctl->ctl_name,
|
| 384 |
|
|
&nrels, results);
|
| 385 |
|
|
|
| 386 |
|
|
filp->f_pos += *lenp;
|
| 387 |
|
|
return 0;
|
| 388 |
|
|
} else { /* read */
|
| 389 |
|
|
/* Get the information from the client into results */
|
| 390 |
|
|
callback(client, SENSORS_PROC_REAL_READ, ctl->ctl_name,
|
| 391 |
|
|
&nrels, results);
|
| 392 |
|
|
|
| 393 |
|
|
/* And write them to buffer, converting to reals */
|
| 394 |
|
|
res = i2c_write_reals(nrels, buffer, lenp, results, mag);
|
| 395 |
|
|
if (res)
|
| 396 |
|
|
return res;
|
| 397 |
|
|
filp->f_pos += *lenp;
|
| 398 |
|
|
return 0;
|
| 399 |
|
|
}
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
/* This function is equivalent to i2c_proc_real, only it interacts with
|
| 403 |
|
|
the sysctl(2) syscall, and returns no reals, but integers */
|
| 404 |
|
|
int i2c_sysctl_real(ctl_table * table, int *name, int nlen,
|
| 405 |
|
|
void *oldval, size_t * oldlenp, void *newval,
|
| 406 |
|
|
size_t newlen, void **context)
|
| 407 |
|
|
{
|
| 408 |
|
|
long results[MAX_RESULTS];
|
| 409 |
|
|
int oldlen, nrels = MAX_RESULTS,ret=0;
|
| 410 |
|
|
i2c_real_callback callback = table->extra1;
|
| 411 |
|
|
struct i2c_client *client = table->extra2;
|
| 412 |
|
|
|
| 413 |
|
|
/* Check if we need to output the old values */
|
| 414 |
|
|
if (oldval && oldlenp && !((ret=get_user(oldlen, oldlenp))) && oldlen) {
|
| 415 |
|
|
callback(client, SENSORS_PROC_REAL_READ, table->ctl_name,
|
| 416 |
|
|
&nrels, results);
|
| 417 |
|
|
|
| 418 |
|
|
/* Note the rounding factor! */
|
| 419 |
|
|
if (nrels * sizeof(long) < oldlen)
|
| 420 |
|
|
oldlen = nrels * sizeof(long);
|
| 421 |
|
|
oldlen = (oldlen / sizeof(long)) * sizeof(long);
|
| 422 |
|
|
if(copy_to_user(oldval, results, oldlen))
|
| 423 |
|
|
return -EFAULT;
|
| 424 |
|
|
if(put_user(oldlen, oldlenp))
|
| 425 |
|
|
return -EFAULT;
|
| 426 |
|
|
}
|
| 427 |
|
|
|
| 428 |
|
|
if (newval && newlen) {
|
| 429 |
|
|
/* Note the rounding factor! */
|
| 430 |
|
|
newlen -= newlen % sizeof(long);
|
| 431 |
|
|
nrels = newlen / sizeof(long);
|
| 432 |
|
|
if(copy_from_user(results, newval, newlen))
|
| 433 |
|
|
return -EFAULT;
|
| 434 |
|
|
|
| 435 |
|
|
/* Get the new values back to the client */
|
| 436 |
|
|
callback(client, SENSORS_PROC_REAL_WRITE, table->ctl_name,
|
| 437 |
|
|
&nrels, results);
|
| 438 |
|
|
}
|
| 439 |
|
|
return ret;
|
| 440 |
|
|
}
|
| 441 |
|
|
|
| 442 |
|
|
|
| 443 |
|
|
/* nrels contains initially the maximum number of elements which can be
|
| 444 |
|
|
put in results, and finally the number of elements actually put there.
|
| 445 |
|
|
A magnitude of 1 will multiply everything with 10; etc.
|
| 446 |
|
|
buffer, bufsize is the character buffer we read from and its length.
|
| 447 |
|
|
results will finally contain the parsed integers.
|
| 448 |
|
|
|
| 449 |
|
|
Buffer should contain several reals, separated by whitespace. A real
|
| 450 |
|
|
has the following syntax:
|
| 451 |
|
|
[ Minus ] Digit* [ Dot Digit* ]
|
| 452 |
|
|
(everything between [] is optional; * means zero or more).
|
| 453 |
|
|
When the next character is unparsable, everything is skipped until the
|
| 454 |
|
|
next whitespace.
|
| 455 |
|
|
|
| 456 |
|
|
WARNING! This is tricky code. I have tested it, but there may still be
|
| 457 |
|
|
hidden bugs in it, even leading to crashes and things!
|
| 458 |
|
|
*/
|
| 459 |
|
|
int i2c_parse_reals(int *nrels, void *buffer, int bufsize,
|
| 460 |
|
|
long *results, int magnitude)
|
| 461 |
|
|
{
|
| 462 |
|
|
int maxels, min, mag;
|
| 463 |
|
|
long res,ret=0;
|
| 464 |
|
|
char nextchar = 0;
|
| 465 |
|
|
|
| 466 |
|
|
maxels = *nrels;
|
| 467 |
|
|
*nrels = 0;
|
| 468 |
|
|
|
| 469 |
|
|
while (bufsize && (*nrels < maxels)) {
|
| 470 |
|
|
|
| 471 |
|
|
/* Skip spaces at the start */
|
| 472 |
|
|
while (bufsize &&
|
| 473 |
|
|
!((ret=get_user(nextchar, (char *) buffer))) &&
|
| 474 |
|
|
isspace((int) nextchar)) {
|
| 475 |
|
|
bufsize--;
|
| 476 |
|
|
((char *) buffer)++;
|
| 477 |
|
|
}
|
| 478 |
|
|
|
| 479 |
|
|
if (ret)
|
| 480 |
|
|
return -EFAULT;
|
| 481 |
|
|
/* Well, we may be done now */
|
| 482 |
|
|
if (!bufsize)
|
| 483 |
|
|
return 0;
|
| 484 |
|
|
|
| 485 |
|
|
/* New defaults for our result */
|
| 486 |
|
|
min = 0;
|
| 487 |
|
|
res = 0;
|
| 488 |
|
|
mag = magnitude;
|
| 489 |
|
|
|
| 490 |
|
|
/* Check for a minus */
|
| 491 |
|
|
if (!((ret=get_user(nextchar, (char *) buffer)))
|
| 492 |
|
|
&& (nextchar == '-')) {
|
| 493 |
|
|
min = 1;
|
| 494 |
|
|
bufsize--;
|
| 495 |
|
|
((char *) buffer)++;
|
| 496 |
|
|
}
|
| 497 |
|
|
if (ret)
|
| 498 |
|
|
return -EFAULT;
|
| 499 |
|
|
|
| 500 |
|
|
/* Digits before a decimal dot */
|
| 501 |
|
|
while (bufsize &&
|
| 502 |
|
|
!((ret=get_user(nextchar, (char *) buffer))) &&
|
| 503 |
|
|
isdigit((int) nextchar)) {
|
| 504 |
|
|
res = res * 10 + nextchar - '0';
|
| 505 |
|
|
bufsize--;
|
| 506 |
|
|
((char *) buffer)++;
|
| 507 |
|
|
}
|
| 508 |
|
|
if (ret)
|
| 509 |
|
|
return -EFAULT;
|
| 510 |
|
|
|
| 511 |
|
|
/* If mag < 0, we must actually divide here! */
|
| 512 |
|
|
while (mag < 0) {
|
| 513 |
|
|
res = res / 10;
|
| 514 |
|
|
mag++;
|
| 515 |
|
|
}
|
| 516 |
|
|
|
| 517 |
|
|
if (bufsize && (nextchar == '.')) {
|
| 518 |
|
|
/* Skip the dot */
|
| 519 |
|
|
bufsize--;
|
| 520 |
|
|
((char *) buffer)++;
|
| 521 |
|
|
|
| 522 |
|
|
/* Read digits while they are significant */
|
| 523 |
|
|
while (bufsize && (mag > 0) &&
|
| 524 |
|
|
!((ret=get_user(nextchar, (char *) buffer))) &&
|
| 525 |
|
|
isdigit((int) nextchar)) {
|
| 526 |
|
|
res = res * 10 + nextchar - '0';
|
| 527 |
|
|
mag--;
|
| 528 |
|
|
bufsize--;
|
| 529 |
|
|
((char *) buffer)++;
|
| 530 |
|
|
}
|
| 531 |
|
|
if (ret)
|
| 532 |
|
|
return -EFAULT;
|
| 533 |
|
|
}
|
| 534 |
|
|
/* If we are out of data, but mag > 0, we need to scale here */
|
| 535 |
|
|
while (mag > 0) {
|
| 536 |
|
|
res = res * 10;
|
| 537 |
|
|
mag--;
|
| 538 |
|
|
}
|
| 539 |
|
|
|
| 540 |
|
|
/* Skip everything until we hit whitespace */
|
| 541 |
|
|
while (bufsize &&
|
| 542 |
|
|
!((ret=get_user(nextchar, (char *) buffer))) &&
|
| 543 |
|
|
isspace((int) nextchar)) {
|
| 544 |
|
|
bufsize--;
|
| 545 |
|
|
((char *) buffer)++;
|
| 546 |
|
|
}
|
| 547 |
|
|
if (ret)
|
| 548 |
|
|
return -EFAULT;
|
| 549 |
|
|
|
| 550 |
|
|
/* Put res in results */
|
| 551 |
|
|
results[*nrels] = (min ? -1 : 1) * res;
|
| 552 |
|
|
(*nrels)++;
|
| 553 |
|
|
}
|
| 554 |
|
|
|
| 555 |
|
|
/* Well, there may be more in the buffer, but we need no more data.
|
| 556 |
|
|
Ignore anything that is left. */
|
| 557 |
|
|
return 0;
|
| 558 |
|
|
}
|
| 559 |
|
|
|
| 560 |
|
|
int i2c_write_reals(int nrels, void *buffer, int *bufsize,
|
| 561 |
|
|
long *results, int magnitude)
|
| 562 |
|
|
{
|
| 563 |
|
|
#define BUFLEN 20
|
| 564 |
|
|
char BUF[BUFLEN + 1]; /* An individual representation should fit! */
|
| 565 |
|
|
char printfstr[10];
|
| 566 |
|
|
int nr = 0;
|
| 567 |
|
|
int buflen, mag, times;
|
| 568 |
|
|
int curbufsize = 0;
|
| 569 |
|
|
|
| 570 |
|
|
while ((nr < nrels) && (curbufsize < *bufsize)) {
|
| 571 |
|
|
mag = magnitude;
|
| 572 |
|
|
|
| 573 |
|
|
if (nr != 0) {
|
| 574 |
|
|
if(put_user(' ', (char *) buffer))
|
| 575 |
|
|
return -EFAULT;
|
| 576 |
|
|
curbufsize++;
|
| 577 |
|
|
((char *) buffer)++;
|
| 578 |
|
|
}
|
| 579 |
|
|
|
| 580 |
|
|
/* Fill BUF with the representation of the next string */
|
| 581 |
|
|
if (mag <= 0) {
|
| 582 |
|
|
buflen = sprintf(BUF, "%ld", results[nr]);
|
| 583 |
|
|
if (buflen < 0) { /* Oops, a sprintf error! */
|
| 584 |
|
|
*bufsize = 0;
|
| 585 |
|
|
return -EINVAL;
|
| 586 |
|
|
}
|
| 587 |
|
|
while ((mag < 0) && (buflen < BUFLEN)) {
|
| 588 |
|
|
BUF[buflen++] = '0';
|
| 589 |
|
|
mag++;
|
| 590 |
|
|
}
|
| 591 |
|
|
BUF[buflen] = 0;
|
| 592 |
|
|
} else {
|
| 593 |
|
|
times = 1;
|
| 594 |
|
|
for (times = 1; mag-- > 0; times *= 10);
|
| 595 |
|
|
if (results[nr] < 0) {
|
| 596 |
|
|
BUF[0] = '-';
|
| 597 |
|
|
buflen = 1;
|
| 598 |
|
|
} else
|
| 599 |
|
|
buflen = 0;
|
| 600 |
|
|
strcpy(printfstr, "%ld.%0Xld");
|
| 601 |
|
|
printfstr[6] = magnitude + '0';
|
| 602 |
|
|
buflen +=
|
| 603 |
|
|
sprintf(BUF + buflen, printfstr,
|
| 604 |
|
|
abs(results[nr]) / times,
|
| 605 |
|
|
abs(results[nr]) % times);
|
| 606 |
|
|
if (buflen < 0) { /* Oops, a sprintf error! */
|
| 607 |
|
|
*bufsize = 0;
|
| 608 |
|
|
return -EINVAL;
|
| 609 |
|
|
}
|
| 610 |
|
|
}
|
| 611 |
|
|
|
| 612 |
|
|
/* Now copy it to the user-space buffer */
|
| 613 |
|
|
if (buflen + curbufsize > *bufsize)
|
| 614 |
|
|
buflen = *bufsize - curbufsize;
|
| 615 |
|
|
if(copy_to_user(buffer, BUF, buflen))
|
| 616 |
|
|
return -EFAULT;
|
| 617 |
|
|
curbufsize += buflen;
|
| 618 |
|
|
(char *) buffer += buflen;
|
| 619 |
|
|
|
| 620 |
|
|
nr++;
|
| 621 |
|
|
}
|
| 622 |
|
|
if (curbufsize < *bufsize) {
|
| 623 |
|
|
if(put_user('\n', (char *) buffer))
|
| 624 |
|
|
return -EFAULT;
|
| 625 |
|
|
curbufsize++;
|
| 626 |
|
|
}
|
| 627 |
|
|
*bufsize = curbufsize;
|
| 628 |
|
|
return 0;
|
| 629 |
|
|
}
|
| 630 |
|
|
|
| 631 |
|
|
|
| 632 |
|
|
/* Very inefficient for ISA detects, and won't work for 10-bit addresses! */
|
| 633 |
|
|
int i2c_detect(struct i2c_adapter *adapter,
|
| 634 |
|
|
struct i2c_address_data *address_data,
|
| 635 |
|
|
i2c_found_addr_proc * found_proc)
|
| 636 |
|
|
{
|
| 637 |
|
|
int addr, i, found, j, err;
|
| 638 |
|
|
struct i2c_force_data *this_force;
|
| 639 |
|
|
int is_isa = i2c_is_isa_adapter(adapter);
|
| 640 |
|
|
int adapter_id =
|
| 641 |
|
|
is_isa ? SENSORS_ISA_BUS : i2c_adapter_id(adapter);
|
| 642 |
|
|
|
| 643 |
|
|
/* Forget it if we can't probe using SMBUS_QUICK */
|
| 644 |
|
|
if ((!is_isa)
|
| 645 |
|
|
&& !i2c_check_functionality(adapter,
|
| 646 |
|
|
I2C_FUNC_SMBUS_QUICK)) return -1;
|
| 647 |
|
|
|
| 648 |
|
|
for (addr = 0x00; addr <= (is_isa ? 0xffff : 0x7f); addr++) {
|
| 649 |
|
|
if ((is_isa && check_region(addr, 1)) ||
|
| 650 |
|
|
(!is_isa && i2c_check_addr(adapter, addr)))
|
| 651 |
|
|
continue;
|
| 652 |
|
|
|
| 653 |
|
|
/* If it is in one of the force entries, we don't do any
|
| 654 |
|
|
detection at all */
|
| 655 |
|
|
found = 0;
|
| 656 |
|
|
for (i = 0;
|
| 657 |
|
|
!found
|
| 658 |
|
|
&& (this_force =
|
| 659 |
|
|
address_data->forces + i, this_force->force); i++) {
|
| 660 |
|
|
for (j = 0;
|
| 661 |
|
|
!found
|
| 662 |
|
|
&& (this_force->force[j] != SENSORS_I2C_END);
|
| 663 |
|
|
j += 2) {
|
| 664 |
|
|
if (
|
| 665 |
|
|
((adapter_id == this_force->force[j])
|
| 666 |
|
|
||
|
| 667 |
|
|
((this_force->
|
| 668 |
|
|
force[j] == SENSORS_ANY_I2C_BUS)
|
| 669 |
|
|
&& !is_isa))
|
| 670 |
|
|
&& (addr == this_force->force[j + 1])) {
|
| 671 |
|
|
#ifdef DEBUG
|
| 672 |
|
|
printk
|
| 673 |
|
|
(KERN_DEBUG "i2c-proc.o: found force parameter for adapter %d, addr %04x\n",
|
| 674 |
|
|
adapter_id, addr);
|
| 675 |
|
|
#endif
|
| 676 |
|
|
if (
|
| 677 |
|
|
(err =
|
| 678 |
|
|
found_proc(adapter, addr, 0,
|
| 679 |
|
|
this_force->
|
| 680 |
|
|
kind))) return err;
|
| 681 |
|
|
found = 1;
|
| 682 |
|
|
}
|
| 683 |
|
|
}
|
| 684 |
|
|
}
|
| 685 |
|
|
if (found)
|
| 686 |
|
|
continue;
|
| 687 |
|
|
|
| 688 |
|
|
/* If this address is in one of the ignores, we can forget about it
|
| 689 |
|
|
right now */
|
| 690 |
|
|
for (i = 0;
|
| 691 |
|
|
!found
|
| 692 |
|
|
&& (address_data->ignore[i] != SENSORS_I2C_END);
|
| 693 |
|
|
i += 2) {
|
| 694 |
|
|
if (
|
| 695 |
|
|
((adapter_id == address_data->ignore[i])
|
| 696 |
|
|
||
|
| 697 |
|
|
((address_data->
|
| 698 |
|
|
ignore[i] == SENSORS_ANY_I2C_BUS)
|
| 699 |
|
|
&& !is_isa))
|
| 700 |
|
|
&& (addr == address_data->ignore[i + 1])) {
|
| 701 |
|
|
#ifdef DEBUG
|
| 702 |
|
|
printk
|
| 703 |
|
|
(KERN_DEBUG "i2c-proc.o: found ignore parameter for adapter %d, "
|
| 704 |
|
|
"addr %04x\n", adapter_id, addr);
|
| 705 |
|
|
#endif
|
| 706 |
|
|
found = 1;
|
| 707 |
|
|
}
|
| 708 |
|
|
}
|
| 709 |
|
|
for (i = 0;
|
| 710 |
|
|
!found
|
| 711 |
|
|
&& (address_data->ignore_range[i] != SENSORS_I2C_END);
|
| 712 |
|
|
i += 3) {
|
| 713 |
|
|
if (
|
| 714 |
|
|
((adapter_id == address_data->ignore_range[i])
|
| 715 |
|
|
||
|
| 716 |
|
|
((address_data->
|
| 717 |
|
|
ignore_range[i] ==
|
| 718 |
|
|
SENSORS_ANY_I2C_BUS) && !is_isa))
|
| 719 |
|
|
&& (addr >= address_data->ignore_range[i + 1])
|
| 720 |
|
|
&& (addr <= address_data->ignore_range[i + 2])) {
|
| 721 |
|
|
#ifdef DEBUG
|
| 722 |
|
|
printk
|
| 723 |
|
|
(KERN_DEBUG "i2c-proc.o: found ignore_range parameter for adapter %d, "
|
| 724 |
|
|
"addr %04x\n", adapter_id, addr);
|
| 725 |
|
|
#endif
|
| 726 |
|
|
found = 1;
|
| 727 |
|
|
}
|
| 728 |
|
|
}
|
| 729 |
|
|
if (found)
|
| 730 |
|
|
continue;
|
| 731 |
|
|
|
| 732 |
|
|
/* Now, we will do a detection, but only if it is in the normal or
|
| 733 |
|
|
probe entries */
|
| 734 |
|
|
if (is_isa) {
|
| 735 |
|
|
for (i = 0;
|
| 736 |
|
|
!found
|
| 737 |
|
|
&& (address_data->normal_isa[i] !=
|
| 738 |
|
|
SENSORS_ISA_END); i += 1) {
|
| 739 |
|
|
if (addr == address_data->normal_isa[i]) {
|
| 740 |
|
|
#ifdef DEBUG
|
| 741 |
|
|
printk
|
| 742 |
|
|
(KERN_DEBUG "i2c-proc.o: found normal isa entry for adapter %d, "
|
| 743 |
|
|
"addr %04x\n", adapter_id,
|
| 744 |
|
|
addr);
|
| 745 |
|
|
#endif
|
| 746 |
|
|
found = 1;
|
| 747 |
|
|
}
|
| 748 |
|
|
}
|
| 749 |
|
|
for (i = 0;
|
| 750 |
|
|
!found
|
| 751 |
|
|
&& (address_data->normal_isa_range[i] !=
|
| 752 |
|
|
SENSORS_ISA_END); i += 3) {
|
| 753 |
|
|
if ((addr >=
|
| 754 |
|
|
address_data->normal_isa_range[i])
|
| 755 |
|
|
&& (addr <=
|
| 756 |
|
|
address_data->normal_isa_range[i + 1])
|
| 757 |
|
|
&&
|
| 758 |
|
|
((addr -
|
| 759 |
|
|
address_data->normal_isa_range[i]) %
|
| 760 |
|
|
address_data->normal_isa_range[i + 2] ==
|
| 761 |
|
|
0)) {
|
| 762 |
|
|
#ifdef DEBUG
|
| 763 |
|
|
printk
|
| 764 |
|
|
(KERN_DEBUG "i2c-proc.o: found normal isa_range entry for adapter %d, "
|
| 765 |
|
|
"addr %04x", adapter_id, addr);
|
| 766 |
|
|
#endif
|
| 767 |
|
|
found = 1;
|
| 768 |
|
|
}
|
| 769 |
|
|
}
|
| 770 |
|
|
} else {
|
| 771 |
|
|
for (i = 0;
|
| 772 |
|
|
!found && (address_data->normal_i2c[i] !=
|
| 773 |
|
|
SENSORS_I2C_END); i += 1) {
|
| 774 |
|
|
if (addr == address_data->normal_i2c[i]) {
|
| 775 |
|
|
found = 1;
|
| 776 |
|
|
#ifdef DEBUG
|
| 777 |
|
|
printk
|
| 778 |
|
|
(KERN_DEBUG "i2c-proc.o: found normal i2c entry for adapter %d, "
|
| 779 |
|
|
"addr %02x", adapter_id, addr);
|
| 780 |
|
|
#endif
|
| 781 |
|
|
}
|
| 782 |
|
|
}
|
| 783 |
|
|
for (i = 0;
|
| 784 |
|
|
!found
|
| 785 |
|
|
&& (address_data->normal_i2c_range[i] !=
|
| 786 |
|
|
SENSORS_I2C_END); i += 2) {
|
| 787 |
|
|
if ((addr >=
|
| 788 |
|
|
address_data->normal_i2c_range[i])
|
| 789 |
|
|
&& (addr <=
|
| 790 |
|
|
address_data->normal_i2c_range[i + 1]))
|
| 791 |
|
|
{
|
| 792 |
|
|
#ifdef DEBUG
|
| 793 |
|
|
printk
|
| 794 |
|
|
(KERN_DEBUG "i2c-proc.o: found normal i2c_range entry for adapter %d, "
|
| 795 |
|
|
"addr %04x\n", adapter_id, addr);
|
| 796 |
|
|
#endif
|
| 797 |
|
|
found = 1;
|
| 798 |
|
|
}
|
| 799 |
|
|
}
|
| 800 |
|
|
}
|
| 801 |
|
|
|
| 802 |
|
|
for (i = 0;
|
| 803 |
|
|
!found && (address_data->probe[i] != SENSORS_I2C_END);
|
| 804 |
|
|
i += 2) {
|
| 805 |
|
|
if (((adapter_id == address_data->probe[i]) ||
|
| 806 |
|
|
((address_data->
|
| 807 |
|
|
probe[i] == SENSORS_ANY_I2C_BUS) && !is_isa))
|
| 808 |
|
|
&& (addr == address_data->probe[i + 1])) {
|
| 809 |
|
|
#ifdef DEBUG
|
| 810 |
|
|
printk
|
| 811 |
|
|
(KERN_DEBUG "i2c-proc.o: found probe parameter for adapter %d, "
|
| 812 |
|
|
"addr %04x\n", adapter_id, addr);
|
| 813 |
|
|
#endif
|
| 814 |
|
|
found = 1;
|
| 815 |
|
|
}
|
| 816 |
|
|
}
|
| 817 |
|
|
for (i = 0; !found &&
|
| 818 |
|
|
(address_data->probe_range[i] != SENSORS_I2C_END);
|
| 819 |
|
|
i += 3) {
|
| 820 |
|
|
if (
|
| 821 |
|
|
((adapter_id == address_data->probe_range[i])
|
| 822 |
|
|
||
|
| 823 |
|
|
((address_data->probe_range[i] ==
|
| 824 |
|
|
SENSORS_ANY_I2C_BUS) && !is_isa))
|
| 825 |
|
|
&& (addr >= address_data->probe_range[i + 1])
|
| 826 |
|
|
&& (addr <= address_data->probe_range[i + 2])) {
|
| 827 |
|
|
found = 1;
|
| 828 |
|
|
#ifdef DEBUG
|
| 829 |
|
|
printk
|
| 830 |
|
|
(KERN_DEBUG "i2c-proc.o: found probe_range parameter for adapter %d, "
|
| 831 |
|
|
"addr %04x\n", adapter_id, addr);
|
| 832 |
|
|
#endif
|
| 833 |
|
|
}
|
| 834 |
|
|
}
|
| 835 |
|
|
if (!found)
|
| 836 |
|
|
continue;
|
| 837 |
|
|
|
| 838 |
|
|
/* OK, so we really should examine this address. First check
|
| 839 |
|
|
whether there is some client here at all! */
|
| 840 |
|
|
if (is_isa ||
|
| 841 |
|
|
(i2c_smbus_xfer
|
| 842 |
|
|
(adapter, addr, 0, 0, 0, I2C_SMBUS_QUICK, NULL) >= 0))
|
| 843 |
|
|
if ((err = found_proc(adapter, addr, 0, -1)))
|
| 844 |
|
|
return err;
|
| 845 |
|
|
}
|
| 846 |
|
|
return 0;
|
| 847 |
|
|
}
|
| 848 |
|
|
|
| 849 |
|
|
int __init sensors_init(void)
|
| 850 |
|
|
{
|
| 851 |
|
|
printk(KERN_INFO "i2c-proc.o version %s (%s)\n", I2C_VERSION, I2C_DATE);
|
| 852 |
|
|
i2c_initialized = 0;
|
| 853 |
|
|
if (!
|
| 854 |
|
|
(i2c_proc_header =
|
| 855 |
|
|
register_sysctl_table(i2c_proc, 0))) return -ENOMEM;
|
| 856 |
|
|
i2c_proc_header->ctl_table->child->de->owner = THIS_MODULE;
|
| 857 |
|
|
i2c_initialized++;
|
| 858 |
|
|
return 0;
|
| 859 |
|
|
}
|
| 860 |
|
|
|
| 861 |
|
|
EXPORT_SYMBOL(i2c_deregister_entry);
|
| 862 |
|
|
EXPORT_SYMBOL(i2c_detect);
|
| 863 |
|
|
EXPORT_SYMBOL(i2c_proc_real);
|
| 864 |
|
|
EXPORT_SYMBOL(i2c_register_entry);
|
| 865 |
|
|
EXPORT_SYMBOL(i2c_sysctl_real);
|
| 866 |
|
|
|
| 867 |
|
|
#ifdef MODULE
|
| 868 |
|
|
|
| 869 |
|
|
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>");
|
| 870 |
|
|
MODULE_DESCRIPTION("i2c-proc driver");
|
| 871 |
|
|
MODULE_LICENSE("GPL");
|
| 872 |
|
|
|
| 873 |
|
|
int i2c_cleanup(void)
|
| 874 |
|
|
{
|
| 875 |
|
|
if (i2c_initialized >= 1) {
|
| 876 |
|
|
unregister_sysctl_table(i2c_proc_header);
|
| 877 |
|
|
i2c_initialized--;
|
| 878 |
|
|
}
|
| 879 |
|
|
return 0;
|
| 880 |
|
|
}
|
| 881 |
|
|
|
| 882 |
|
|
int init_module(void)
|
| 883 |
|
|
{
|
| 884 |
|
|
return sensors_init();
|
| 885 |
|
|
}
|
| 886 |
|
|
|
| 887 |
|
|
int cleanup_module(void)
|
| 888 |
|
|
{
|
| 889 |
|
|
return i2c_cleanup();
|
| 890 |
|
|
}
|
| 891 |
|
|
#endif /* MODULE */
|
