17fecb5582
This is a 1-wire/w1 DS2423 slave driver for reading the values from all 4 counters available DS2423 devices by using standard w1_slave file. In ds2423 the counters are tied to ram pages 12-15 in and each of those ram-pages. Each of these counter values (and asoociated ram page values) are represented as a own line in w1_slave file. Driver has been tested on mips and x86. usage example: cat /sys/bus/w1/devices/1d-00000009b964/w1_slave 00 02 00 00 00 00 00 00 00 6d 38 00 ff ff 00 00 fe ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2 00 02 00 00 00 00 00 00 00 e0 1f 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2 00 5a 0e 5f 18 00 00 00 00 0b 28 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=408882778 00 05 00 00 00 00 00 00 00 8d 39 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff crc=YES c=5 Patch includes also the documentation. [randy.dunlap@oracle.com: fix ds2423 build, needs to select CRC16] Signed-off-by: Mika Laitio <lamikr@pilppa.org> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* w1_family.h
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*
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* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
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*
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*
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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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*
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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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*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __W1_FAMILY_H
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#define __W1_FAMILY_H
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#include <linux/types.h>
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#include <linux/device.h>
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#include <asm/atomic.h>
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#define W1_FAMILY_DEFAULT 0
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#define W1_FAMILY_SMEM_01 0x01
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#define W1_FAMILY_SMEM_81 0x81
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#define W1_THERM_DS18S20 0x10
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#define W1_COUNTER_DS2423 0x1D
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#define W1_THERM_DS1822 0x22
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#define W1_EEPROM_DS2433 0x23
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#define W1_THERM_DS18B20 0x28
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#define W1_EEPROM_DS2431 0x2D
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#define W1_FAMILY_DS2760 0x30
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#define MAXNAMELEN 32
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struct w1_slave;
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struct w1_family_ops
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{
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int (* add_slave)(struct w1_slave *);
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void (* remove_slave)(struct w1_slave *);
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};
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struct w1_family
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{
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struct list_head family_entry;
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u8 fid;
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struct w1_family_ops *fops;
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atomic_t refcnt;
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};
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extern spinlock_t w1_flock;
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void w1_family_put(struct w1_family *);
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void __w1_family_get(struct w1_family *);
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struct w1_family * w1_family_registered(u8);
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void w1_unregister_family(struct w1_family *);
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int w1_register_family(struct w1_family *);
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#endif /* __W1_FAMILY_H */
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