mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6adf87bd7b
I've created reconnect feature - if on start there are no registered families all new devices will have defailt family, later when driver for appropriate family is loaded, slaves, which were faound earlier, will still have defult family instead of right one. Reconnect feature will force control thread to run through all master devices and all slaves found and search for slaves with default family id and try to reconnect them. It does not store newly registered family and does not check only those slaves which have reg_num.family the same as being registered one - all slaves with default family are reconnected. Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
175 lines
3.8 KiB
C
175 lines
3.8 KiB
C
/*
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* ds_w1_bridge.c
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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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#include <linux/module.h>
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#include <linux/types.h>
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#include "../w1/w1.h"
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#include "../w1/w1_int.h"
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#include "dscore.h"
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static struct ds_device *ds_dev;
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static struct w1_bus_master *ds_bus_master;
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static u8 ds9490r_touch_bit(unsigned long data, u8 bit)
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{
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u8 ret;
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struct ds_device *dev = (struct ds_device *)data;
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if (ds_touch_bit(dev, bit, &ret))
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return 0;
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return ret;
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}
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static void ds9490r_write_bit(unsigned long data, u8 bit)
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{
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struct ds_device *dev = (struct ds_device *)data;
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ds_write_bit(dev, bit);
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}
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static void ds9490r_write_byte(unsigned long data, u8 byte)
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{
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struct ds_device *dev = (struct ds_device *)data;
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ds_write_byte(dev, byte);
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}
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static u8 ds9490r_read_bit(unsigned long data)
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{
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struct ds_device *dev = (struct ds_device *)data;
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int err;
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u8 bit = 0;
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err = ds_touch_bit(dev, 1, &bit);
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if (err)
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return 0;
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//err = ds_read_bit(dev, &bit);
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//if (err)
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// return 0;
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return bit & 1;
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}
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static u8 ds9490r_read_byte(unsigned long data)
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{
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struct ds_device *dev = (struct ds_device *)data;
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int err;
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u8 byte = 0;
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err = ds_read_byte(dev, &byte);
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if (err)
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return 0;
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return byte;
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}
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static void ds9490r_write_block(unsigned long data, const u8 *buf, int len)
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{
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struct ds_device *dev = (struct ds_device *)data;
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ds_write_block(dev, (u8 *)buf, len);
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}
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static u8 ds9490r_read_block(unsigned long data, u8 *buf, int len)
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{
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struct ds_device *dev = (struct ds_device *)data;
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int err;
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err = ds_read_block(dev, buf, len);
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if (err < 0)
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return 0;
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return len;
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}
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static u8 ds9490r_reset(unsigned long data)
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{
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struct ds_device *dev = (struct ds_device *)data;
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struct ds_status st;
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int err;
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memset(&st, 0, sizeof(st));
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err = ds_reset(dev, &st);
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if (err)
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return 1;
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return 0;
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}
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static int __devinit ds_w1_init(void)
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{
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int err;
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ds_bus_master = kmalloc(sizeof(*ds_bus_master), GFP_KERNEL);
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if (!ds_bus_master) {
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printk(KERN_ERR "Failed to allocate DS9490R USB<->W1 bus_master structure.\n");
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return -ENOMEM;
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}
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ds_dev = ds_get_device();
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if (!ds_dev) {
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printk(KERN_ERR "DS9490R is not registered.\n");
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err = -ENODEV;
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goto err_out_free_bus_master;
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}
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memset(ds_bus_master, 0, sizeof(*ds_bus_master));
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ds_bus_master->data = (unsigned long)ds_dev;
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ds_bus_master->touch_bit = &ds9490r_touch_bit;
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ds_bus_master->read_bit = &ds9490r_read_bit;
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ds_bus_master->write_bit = &ds9490r_write_bit;
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ds_bus_master->read_byte = &ds9490r_read_byte;
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ds_bus_master->write_byte = &ds9490r_write_byte;
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ds_bus_master->read_block = &ds9490r_read_block;
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ds_bus_master->write_block = &ds9490r_write_block;
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ds_bus_master->reset_bus = &ds9490r_reset;
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err = w1_add_master_device(ds_bus_master);
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if (err)
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goto err_out_put_device;
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return 0;
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err_out_put_device:
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ds_put_device(ds_dev);
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err_out_free_bus_master:
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kfree(ds_bus_master);
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return err;
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}
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static void __devexit ds_w1_fini(void)
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{
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w1_remove_master_device(ds_bus_master);
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ds_put_device(ds_dev);
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kfree(ds_bus_master);
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}
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module_init(ds_w1_init);
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module_exit(ds_w1_fini);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
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