diff options
Diffstat (limited to 'drivers/w1')
| -rw-r--r-- | drivers/w1/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/w1/ds_w1_bridge.c | 4 | ||||
| -rw-r--r-- | drivers/w1/matrox_w1.c | 10 | ||||
| -rw-r--r-- | drivers/w1/w1.c | 564 | ||||
| -rw-r--r-- | drivers/w1/w1.h | 113 | ||||
| -rw-r--r-- | drivers/w1/w1_family.c | 10 | ||||
| -rw-r--r-- | drivers/w1/w1_family.h | 20 | ||||
| -rw-r--r-- | drivers/w1/w1_int.c | 41 | ||||
| -rw-r--r-- | drivers/w1/w1_int.h | 6 | ||||
| -rw-r--r-- | drivers/w1/w1_io.c | 117 | ||||
| -rw-r--r-- | drivers/w1/w1_io.h | 9 | ||||
| -rw-r--r-- | drivers/w1/w1_log.h | 4 | ||||
| -rw-r--r-- | drivers/w1/w1_netlink.h | 4 | ||||
| -rw-r--r-- | drivers/w1/w1_smem.c | 54 | ||||
| -rw-r--r-- | drivers/w1/w1_therm.c | 104 |
15 files changed, 640 insertions, 436 deletions
diff --git a/drivers/w1/Kconfig b/drivers/w1/Kconfig index 2ab65c902fe5..4f120796273e 100644 --- a/drivers/w1/Kconfig +++ b/drivers/w1/Kconfig @@ -3,9 +3,9 @@ menu "Dallas's 1-wire bus" config W1 tristate "Dallas's 1-wire support" ---help--- - Dallas's 1-wire bus is usefull to connect slow 1-pin devices + Dallas's 1-wire bus is usefull to connect slow 1-pin devices such as iButtons and thermal sensors. - + If you want W1 support, you should say Y here. This W1 support can also be built as a module. If so, the module @@ -17,8 +17,8 @@ config W1_MATROX help Say Y here if you want to communicate with your 1-wire devices using Matrox's G400 GPIO pins. - - This support is also available as a module. If so, the module + + This support is also available as a module. If so, the module will be called matrox_w1.ko. config W1_DS9490 @@ -27,17 +27,17 @@ config W1_DS9490 help Say Y here if you want to have a driver for DS9490R UWB <-> W1 bridge. - This support is also available as a module. If so, the module + This support is also available as a module. If so, the module will be called ds9490r.ko. -config W1_DS9490_BRIDGE +config W1_DS9490R_BRIDGE tristate "DS9490R USB <-> W1 transport layer for 1-wire" depends on W1_DS9490 help Say Y here if you want to communicate with your 1-wire devices using DS9490R USB bridge. - This support is also available as a module. If so, the module + This support is also available as a module. If so, the module will be called ds_w1_bridge.ko. config W1_THERM @@ -51,7 +51,7 @@ config W1_SMEM tristate "Simple 64bit memory family implementation" depends on W1 help - Say Y here if you want to connect 1-wire + Say Y here if you want to connect 1-wire simple 64bit memory rom(ds2401/ds2411/ds1990*) to you wire. endmenu diff --git a/drivers/w1/ds_w1_bridge.c b/drivers/w1/ds_w1_bridge.c index 0baaeb5fd630..7bddd8ac7d7f 100644 --- a/drivers/w1/ds_w1_bridge.c +++ b/drivers/w1/ds_w1_bridge.c @@ -83,11 +83,11 @@ static u8 ds9490r_read_byte(unsigned long data) return byte; } -static void ds9490r_write_block(unsigned long data, u8 *buf, int len) +static void ds9490r_write_block(unsigned long data, const u8 *buf, int len) { struct ds_device *dev = (struct ds_device *)data; - ds_write_block(dev, buf, len); + ds_write_block(dev, (u8 *)buf, len); } static u8 ds9490r_read_block(unsigned long data, u8 *buf, int len) diff --git a/drivers/w1/matrox_w1.c b/drivers/w1/matrox_w1.c index e565416458ea..0b03f8f93f63 100644 --- a/drivers/w1/matrox_w1.c +++ b/drivers/w1/matrox_w1.c @@ -1,8 +1,8 @@ /* - * matrox_w1.c + * matrox_w1.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -59,7 +59,7 @@ static struct pci_driver matrox_w1_pci_driver = { .remove = __devexit_p(matrox_w1_remove), }; -/* +/* * Matrox G400 DDC registers. */ @@ -177,8 +177,8 @@ static int __devinit matrox_w1_probe(struct pci_dev *pdev, const struct pci_devi dev->bus_master = (struct w1_bus_master *)(dev + 1); - /* - * True for G400, for some other we need resource 0, see drivers/video/matrox/matroxfb_base.c + /* + * True for G400, for some other we need resource 0, see drivers/video/matrox/matroxfb_base.c */ dev->phys_addr = pci_resource_start(pdev, 1); diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 8d7821899cc1..312cf3220f12 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -1,8 +1,8 @@ /* - * w1.c + * w1.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -59,6 +59,19 @@ static pid_t control_thread; static int control_needs_exit; static DECLARE_COMPLETION(w1_control_complete); +/* stuff for the default family */ +static ssize_t w1_famdefault_read_name(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + return(sprintf(buf, "%s\n", sl->name)); +} +static struct w1_family_ops w1_default_fops = { + .rname = &w1_famdefault_read_name, +}; +static struct w1_family w1_default_family = { + .fops = &w1_default_fops, +}; + static int w1_master_match(struct device *dev, struct device_driver *drv) { return 1; @@ -88,7 +101,7 @@ static void w1_slave_release(struct device *dev) complete(&sl->dev_released); } -static ssize_t w1_default_read_name(struct device *dev, char *buf) +static ssize_t w1_default_read_name(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "No family registered.\n"); } @@ -99,6 +112,20 @@ static ssize_t w1_default_read_bin(struct kobject *kobj, char *buf, loff_t off, return sprintf(buf, "No family registered.\n"); } +static struct device_attribute w1_slave_attribute = + __ATTR(name, S_IRUGO, w1_default_read_name, NULL); + +static struct bin_attribute w1_slave_bin_attribute = { + .attr = { + .name = "w1_slave", + .mode = S_IRUGO, + .owner = THIS_MODULE, + }, + .size = W1_SLAVE_DATA_SIZE, + .read = &w1_default_read_bin, +}; + + static struct bus_type w1_bus_type = { .name = "w1", .match = w1_master_match, @@ -119,104 +146,118 @@ struct device w1_device = { .release = &w1_master_release }; -static struct device_attribute w1_slave_attribute = { - .attr = { - .name = "name", - .mode = S_IRUGO, - .owner = THIS_MODULE - }, - .show = &w1_default_read_name, -}; +static ssize_t w1_master_attribute_show_name(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct w1_master *md = container_of(dev, struct w1_master, dev); + ssize_t count; -static struct device_attribute w1_slave_attribute_val = { - .attr = { - .name = "value", - .mode = S_IRUGO, - .owner = THIS_MODULE - }, - .show = &w1_default_read_name, -}; + if (down_interruptible (&md->mutex)) + return -EBUSY; -static ssize_t w1_master_attribute_show_name(struct device *dev, char *buf) + count = sprintf(buf, "%s\n", md->name); + + up(&md->mutex); + + return count; +} + +static ssize_t w1_master_attribute_store_search(struct device * dev, + struct device_attribute *attr, + const char * buf, size_t count) { - struct w1_master *md = container_of (dev, struct w1_master, dev); + struct w1_master *md = container_of(dev, struct w1_master, dev); + + if (down_interruptible (&md->mutex)) + return -EBUSY; + + md->search_count = simple_strtol(buf, NULL, 0); + + up(&md->mutex); + + return count; +} + +static ssize_t w1_master_attribute_show_search(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct w1_master *md = container_of(dev, struct w1_master, dev); ssize_t count; - + if (down_interruptible (&md->mutex)) return -EBUSY; - count = sprintf(buf, "%s\n", md->name); - + count = sprintf(buf, "%d\n", md->search_count); + up(&md->mutex); return count; } -static ssize_t w1_master_attribute_show_pointer(struct device *dev, char *buf) +static ssize_t w1_master_attribute_show_pointer(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_master *md = container_of(dev, struct w1_master, dev); ssize_t count; - + if (down_interruptible(&md->mutex)) return -EBUSY; count = sprintf(buf, "0x%p\n", md->bus_master); - + up(&md->mutex); return count; } -static ssize_t w1_master_attribute_show_timeout(struct device *dev, char *buf) +static ssize_t w1_master_attribute_show_timeout(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t count; count = sprintf(buf, "%d\n", w1_timeout); return count; } -static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, char *buf) +static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_master *md = container_of(dev, struct w1_master, dev); ssize_t count; - + if (down_interruptible(&md->mutex)) return -EBUSY; count = sprintf(buf, "%d\n", md->max_slave_count); - + up(&md->mutex); return count; } -static ssize_t w1_master_attribute_show_attempts(struct device *dev, char *buf) +static ssize_t w1_master_attribute_show_attempts(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_master *md = container_of(dev, struct w1_master, dev); ssize_t count; - + if (down_interruptible(&md->mutex)) return -EBUSY; count = sprintf(buf, "%lu\n", md->attempts); - + up(&md->mutex); return count; } -static ssize_t w1_master_attribute_show_slave_count(struct device *dev, char *buf) +static ssize_t w1_master_attribute_show_slave_count(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_master *md = container_of(dev, struct w1_master, dev); ssize_t count; - + if (down_interruptible(&md->mutex)) return -EBUSY; count = sprintf(buf, "%d\n", md->slave_count); - + up(&md->mutex); return count; } -static ssize_t w1_master_attribute_show_slaves(struct device *dev, char *buf) - +static ssize_t w1_master_attribute_show_slaves(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_master *md = container_of(dev, struct w1_master, dev); int c = PAGE_SIZE; @@ -233,7 +274,7 @@ static ssize_t w1_master_attribute_show_slaves(struct device *dev, char *buf) list_for_each_safe(ent, n, &md->slist) { sl = list_entry(ent, struct w1_slave, w1_slave_entry); - c -= snprintf(buf + PAGE_SIZE - c, c, "%s\n", sl->name); + c -= snprintf(buf + PAGE_SIZE - c, c, "%s\n", sl->name); } } @@ -242,73 +283,52 @@ static ssize_t w1_master_attribute_show_slaves(struct device *dev, char *buf) return PAGE_SIZE - c; } -static struct device_attribute w1_master_attribute_slaves = { - .attr = { - .name = "w1_master_slaves", - .mode = S_IRUGO, - .owner = THIS_MODULE, - }, - .show = &w1_master_attribute_show_slaves, -}; -static struct device_attribute w1_master_attribute_slave_count = { - .attr = { - .name = "w1_master_slave_count", - .mode = S_IRUGO, - .owner = THIS_MODULE - }, - .show = &w1_master_attribute_show_slave_count, -}; -static struct device_attribute w1_master_attribute_attempts = { - .attr = { - .name = "w1_master_attempts", - .mode = S_IRUGO, - .owner = THIS_MODULE - }, - .show = &w1_master_attribute_show_attempts, -}; -static struct device_attribute w1_master_attribute_max_slave_count = { - .attr = { - .name = "w1_master_max_slave_count", - .mode = S_IRUGO, - .owner = THIS_MODULE - }, - .show = &w1_master_attribute_show_max_slave_count, -}; -static struct device_attribute w1_master_attribute_timeout = { - .attr = { - .name = "w1_master_timeout", - .mode = S_IRUGO, - .owner = THIS_MODULE - }, - .show = &w1_master_attribute_show_timeout, -}; -static struct device_attribute w1_master_attribute_pointer = { - .attr = { - .name = "w1_master_pointer", - .mode = S_IRUGO, - .owner = THIS_MODULE - }, - .show = &w1_master_attribute_show_pointer, -}; -static struct device_attribute w1_master_attribute_name = { - .attr = { - .name = "w1_master_name", - .mode = S_IRUGO, - .owner = THIS_MODULE - }, - .show = &w1_master_attribute_show_name, +#define W1_MASTER_ATTR_RO(_name, _mode) \ + struct device_attribute w1_master_attribute_##_name = \ + __ATTR(w1_master_##_name, _mode, \ + w1_master_attribute_show_##_name, NULL) + +#define W1_MASTER_ATTR_RW(_name, _mode) \ + struct device_attribute w1_master_attribute_##_name = \ + __ATTR(w1_master_##_name, _mode, \ + w1_master_attribute_show_##_name, \ + w1_master_attribute_store_##_name) + +static W1_MASTER_ATTR_RO(name, S_IRUGO); +static W1_MASTER_ATTR_RO(slaves, S_IRUGO); +static W1_MASTER_ATTR_RO(slave_count, S_IRUGO); +static W1_MASTER_ATTR_RO(max_slave_count, S_IRUGO); +static W1_MASTER_ATTR_RO(attempts, S_IRUGO); +static W1_MASTER_ATTR_RO(timeout, S_IRUGO); +static W1_MASTER_ATTR_RO(pointer, S_IRUGO); +static W1_MASTER_ATTR_RW(search, S_IRUGO | S_IWUGO); + +static struct attribute *w1_master_default_attrs[] = { + &w1_master_attribute_name.attr, + &w1_master_attribute_slaves.attr, + &w1_master_attribute_slave_count.attr, + &w1_master_attribute_max_slave_count.attr, + &w1_master_attribute_attempts.attr, + &w1_master_attribute_timeout.attr, + &w1_master_attribute_pointer.attr, + &w1_master_attribute_search.attr, + NULL }; -static struct bin_attribute w1_slave_bin_attribute = { - .attr = { - .name = "w1_slave", - .mode = S_IRUGO, - .owner = THIS_MODULE, - }, - .size = W1_SLAVE_DATA_SIZE, - .read = &w1_default_read_bin, +static struct attribute_group w1_master_defattr_group = { + .attrs = w1_master_default_attrs, }; +int w1_create_master_attributes(struct w1_master *master) +{ + return sysfs_create_group(&master->dev.kobj, &w1_master_defattr_group); +} + +void w1_destroy_master_attributes(struct w1_master *master) +{ + sysfs_remove_group(&master->dev.kobj, &w1_master_defattr_group); +} + static int __w1_attach_slave_device(struct w1_slave *sl) { int err; @@ -319,13 +339,13 @@ static int __w1_attach_slave_device(struct w1_slave *sl) sl->dev.release = &w1_slave_release; snprintf(&sl->dev.bus_id[0], sizeof(sl->dev.bus_id), - "%02x-%012llx", - (unsigned int) sl->reg_num.family, - (unsigned long long) sl->reg_num.id); - snprintf (&sl->name[0], sizeof(sl->name), - "%02x-%012llx", - (unsigned int) sl->reg_num.family, - (unsigned long long) sl->reg_num.id); + "%02x-%012llx", + (unsigned int) sl->reg_num.family, + (unsigned long long) sl->reg_num.id); + snprintf(&sl->name[0], sizeof(sl->name), + "%02x-%012llx", + (unsigned int) sl->reg_num.family, + (unsigned long long) sl->reg_num.id); dev_dbg(&sl->dev, "%s: registering %s.\n", __func__, &sl->dev.bus_id[0]); @@ -333,48 +353,36 @@ static int __w1_attach_slave_device(struct w1_slave *sl) err = device_register(&sl->dev); if (err < 0) { dev_err(&sl->dev, - "Device registration [%s] failed. err=%d\n", - sl->dev.bus_id, err); + "Device registration [%s] failed. err=%d\n", + sl->dev.bus_id, err); return err; } memcpy(&sl->attr_bin, &w1_slave_bin_attribute, sizeof(sl->attr_bin)); memcpy(&sl->attr_name, &w1_slave_attribute, sizeof(sl->attr_name)); - memcpy(&sl->attr_val, &w1_slave_attribute_val, sizeof(sl->attr_val)); - + sl->attr_bin.read = sl->family->fops->rbin; sl->attr_name.show = sl->family->fops->rname; - sl->attr_val.show = sl->family->fops->rval; - sl->attr_val.attr.name = sl->family->fops->rvalname; err = device_create_file(&sl->dev, &sl->attr_name); if (err < 0) { dev_err(&sl->dev, - "sysfs file creation for [%s] failed. err=%d\n", - sl->dev.bus_id, err); - device_unregister(&sl->dev); - return err; - } - - err = device_create_file(&sl->dev, &sl->attr_val); - if (err < 0) { - dev_err(&sl->dev, - "sysfs file creation for [%s] failed. err=%d\n", - sl->dev.bus_id, err); - device_remove_file(&sl->dev, &sl->attr_name); + "sysfs file creation for [%s] failed. err=%d\n", + sl->dev.bus_id, err); device_unregister(&sl->dev); return err; } - err = sysfs_create_bin_file(&sl->dev.kobj, &sl->attr_bin); - if (err < 0) { - dev_err(&sl->dev, - "sysfs file creation for [%s] failed. err=%d\n", - sl->dev.bus_id, err); - device_remove_file(&sl->dev, &sl->attr_name); - device_remove_file(&sl->dev, &sl->attr_val); - device_unregister(&sl->dev); - return err; + if ( sl->attr_bin.read ) { + err = sysfs_create_bin_file(&sl->dev.kobj, &sl->attr_bin); + if (err < 0) { + dev_err(&sl->dev, + "sysfs file creation for [%s] failed. err=%d\n", + sl->dev.bus_id, err); + device_remove_file(&sl->dev, &sl->attr_name); + device_unregister(&sl->dev); + return err; + } } list_add_tail(&sl->w1_slave_entry, &sl->master->slist); @@ -410,12 +418,10 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn) spin_lock(&w1_flock); f = w1_family_registered(rn->family); if (!f) { - spin_unlock(&w1_flock); + f= &w1_default_family; dev_info(&dev->dev, "Family %x for %02x.%012llx.%02x is not registered.\n", rn->family, rn->family, (unsigned long long)rn->id, rn->crc); - kfree(sl); - return -ENODEV; } __w1_family_get(f); spin_unlock(&w1_flock); @@ -445,7 +451,7 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn) static void w1_slave_detach(struct w1_slave *sl) { struct w1_netlink_msg msg; - + dev_info(&sl->dev, "%s: detaching %s.\n", __func__, sl->name); while (atomic_read(&sl->refcnt)) { @@ -456,12 +462,15 @@ static void w1_slave_detach(struct w1_slave *sl) flush_signals(current); } - sysfs_remove_bin_file (&sl->dev.kobj, &sl->attr_bin); + if ( sl->attr_bin.read ) { + sysfs_remove_bin_file (&sl->dev.kobj, &sl->attr_bin); + } device_remove_file(&sl->dev, &sl->attr_name); - device_remove_file(&sl->dev, &sl->attr_val); device_unregister(&sl->dev); w1_family_put(sl->family); + sl->master->slave_count--; + memcpy(&msg.id.id, &sl->reg_num, sizeof(msg.id.id)); msg.type = W1_SLAVE_REMOVE; w1_netlink_send(sl->master, &msg); @@ -471,8 +480,8 @@ static struct w1_master *w1_search_master(unsigned long data) { struct w1_master *dev; int found = 0; - - spin_lock_irq(&w1_mlock); + + spin_lock_bh(&w1_mlock); list_for_each_entry(dev, &w1_masters, w1_master_entry) { if (dev->bus_master->data == data) { found = 1; @@ -480,12 +489,26 @@ static struct w1_master *w1_search_master(unsigned long data) break; } } - spin_unlock_irq(&w1_mlock); + spin_unlock_bh(&w1_mlock); return (found)?dev:NULL; } -void w1_slave_found(unsigned long data, u64 rn) +void w1_reconnect_slaves(struct w1_family *f) +{ + struct w1_master *dev; + + spin_lock_bh(&w1_mlock); + list_for_each_entry(dev, &w1_masters, w1_master_entry) { + dev_info(&dev->dev, "Reconnecting slaves in %s into new family %02x.\n", + dev->name, f->fid); + set_bit(W1_MASTER_NEED_RECONNECT, &dev->flags); + } + spin_unlock_bh(&w1_mlock); +} + + +static void w1_slave_found(unsigned long data, u64 rn) { int slave_count; struct w1_slave *sl; @@ -500,7 +523,7 @@ void w1_slave_found(unsigned long data, u64 rn) data); return; } - + tmp = (struct w1_reg_num *) &rn; slave_count = 0; @@ -513,8 +536,7 @@ void w1_slave_found(unsigned long data, u64 rn) sl->reg_num.crc == tmp->crc) { set_bit(W1_SLAVE_ACTIVE, (long *)&sl->flags); break; - } - else if (sl->reg_num.family == tmp->family) { + } else if (sl->reg_num.family == tmp->family) { family_found = 1; break; } @@ -528,30 +550,43 @@ void w1_slave_found(unsigned long data, u64 rn) rn && ((le64_to_cpu(rn) >> 56) & 0xff) == w1_calc_crc8((u8 *)&rn, 7)) { w1_attach_slave_device(dev, tmp); } - + atomic_dec(&dev->refcnt); } -void w1_search(struct w1_master *dev) +/** + * Performs a ROM Search & registers any devices found. + * The 1-wire search is a simple binary tree search. + * For each bit of the address, we read two bits and write one bit. + * The bit written will put to sleep all devies that don't match that bit. + * When the two reads differ, the direction choice is obvious. + * When both bits are 0, we must choose a path to take. + * When we can scan all 64 bits without having to choose a path, we are done. + * + * See "Application note 187 1-wire search algorithm" at www.maxim-ic.com + * + * @dev The master device to search + * @cb Function to call when a device is found + */ +void w1_search(struct w1_master *dev, w1_slave_found_callback cb) { - u64 last, rn, tmp; - int i, count = 0; - int last_family_desc, last_zero, last_device; - int search_bit, id_bit, comp_bit, desc_bit; + u64 last_rn, rn, tmp64; + int i, slave_count = 0; + int last_zero, last_device; + int search_bit, desc_bit; + u8 triplet_ret = 0; - search_bit = id_bit = comp_bit = 0; - rn = tmp = last = 0; - last_device = last_zero = last_family_desc = 0; + search_bit = 0; + rn = last_rn = 0; + last_device = 0; + last_zero = -1; desc_bit = 64; - while (!(id_bit && comp_bit) && !last_device - && count++ < dev->max_slave_count) { - last = rn; + while ( !last_device && (slave_count++ < dev->max_slave_count) ) { + last_rn = rn; rn = 0; - last_family_desc = 0; - /* * Reset bus and all 1-wire device state machines * so they can respond to our requests. @@ -563,94 +598,46 @@ void w1_search(struct w1_master *dev) break; } -#if 1 + /* Start the search */ w1_write_8(dev, W1_SEARCH); for (i = 0; i < 64; ++i) { - /* - * Read 2 bits from bus. - * All who don't sleep must send ID bit and COMPLEMENT ID bit. - * They actually are ANDed between all senders. - */ - id_bit = w1_touch_bit(dev, 1); - comp_bit = w1_touch_bit(dev, 1); - - if (id_bit && comp_bit) - break; - - if (id_bit == 0 && comp_bit == 0) { - if (i == desc_bit) - search_bit = 1; - else if (i > desc_bit) - search_bit = 0; - else - search_bit = ((last >> i) & 0x1); - - if (search_bit == 0) { - last_zero = i; - if (last_zero < 9) - last_family_desc = last_zero; - } - - } + /* Determine the direction/search bit */ + if (i == desc_bit) + search_bit = 1; /* took the 0 path last time, so take the 1 path */ + else if (i > desc_bit) + search_bit = 0; /* take the 0 path on the next branch */ else - search_bit = id_bit; + search_bit = ((last_rn >> i) & 0x1); - tmp = search_bit; - rn |= (tmp << i); + /** Read two bits and write one bit */ + triplet_ret = w1_triplet(dev, search_bit); - /* - * Write 1 bit to bus - * and make all who don't have "search_bit" in "i"'th position - * in it's registration number sleep. - */ - if (dev->bus_master->touch_bit) - w1_touch_bit(dev, search_bit); - else - w1_write_bit(dev, search_bit); + /* quit if no device responded */ + if ( (triplet_ret & 0x03) == 0x03 ) + break; - } -#endif + /* If both directions were valid, and we took the 0 path... */ + if (triplet_ret == 0) + last_zero = i; - if (desc_bit == last_zero) - last_device = 1; + /* extract the direction taken & update the device number */ + tmp64 = (triplet_ret >> 2); + rn |= (tmp64 << i); + } - desc_bit = last_zero; - - w1_slave_found(dev->bus_master->data, rn); + if ( (triplet_ret & 0x03) != 0x03 ) { + if ( (desc_bit == last_zero) || (last_zero < 0)) + last_device = 1; + desc_bit = last_zero; + cb(dev->bus_master->data, rn); + } } } -int w1_create_master_attributes(struct w1_master *dev) +static int w1_control(void *data) { - if ( device_create_file(&dev->dev, &w1_master_attribute_slaves) < 0 || - device_create_file(&dev->dev, &w1_master_attribute_slave_count) < 0 || - device_create_file(&dev->dev, &w1_master_attribute_attempts) < 0 || - device_create_file(&dev->dev, &w1_master_attribute_max_slave_count) < 0 || - device_create_file(&dev->dev, &w1_master_attribute_timeout) < 0|| - device_create_file(&dev->dev, &w1_master_attribute_pointer) < 0|| - device_create_file(&dev->dev, &w1_master_attribute_name) < 0) - return -EINVAL; - - return 0; -} - -void w1_destroy_master_attributes(struct w1_master *dev) -{ - device_remove_file(&dev->dev, &w1_master_attribute_slaves); - device_remove_file(&dev->dev, &w1_master_attribute_slave_count); - device_remove_file(&dev->dev, &w1_master_attribute_attempts); - device_remove_file(&dev->dev, &w1_master_attribute_max_slave_count); - device_remove_file(&dev->dev, &w1_master_attribute_timeout); - device_remove_file(&dev->dev, &w1_master_attribute_pointer); - device_remove_file(&dev->dev, &w1_master_attribute_name); -} - - -int w1_control(void *data) -{ - struct w1_slave *sl; - struct w1_master *dev; - struct list_head *ent, *ment, *n, *mn; + struct w1_slave *sl, *sln; + struct w1_master *dev, *n; int err, have_to_wait = 0; daemonize("w1_control"); @@ -659,16 +646,14 @@ int w1_control(void *data) while (!control_needs_exit || have_to_wait) { have_to_wait = 0; - try_to_freeze(PF_FREEZE); + try_to_freeze(); msleep_interruptible(w1_timeout * 1000); if (signal_pending(current)) flush_signals(current); - list_for_each_safe(ment, mn, &w1_masters) { - dev = list_entry(ment, struct w1_master, w1_master_entry); - - if (!control_needs_exit && !dev->need_exit) + list_for_each_entry_safe(dev, n, &w1_masters, w1_master_entry) { + if (!control_needs_exit && !dev->flags) continue; /* * Little race: we can create thread but not set the flag. @@ -679,12 +664,8 @@ int w1_control(void *data) continue; } - spin_lock(&w1_mlock); - list_del(&dev->w1_master_entry); - spin_unlock(&w1_mlock); - if (control_needs_exit) { - dev->need_exit = 1; + set_bit(W1_MASTER_NEED_EXIT, &dev->flags); err = kill_proc(dev->kpid, SIGTERM, 1); if (err) @@ -693,24 +674,42 @@ int w1_control(void *data) dev->kpid); } - wait_for_completion(&dev->dev_exited); - - list_for_each_safe(ent, n, &dev->slist) { - sl = list_entry(ent, struct w1_slave, w1_slave_entry); + if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { + wait_for_completion(&dev->dev_exited); + spin_lock_bh(&w1_mlock); + list_del(&dev->w1_master_entry); + spin_unlock_bh(&w1_mlock); - if (!sl) - dev_warn(&dev->dev, - "%s: slave entry is NULL.\n", - __func__); - else { + list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { list_del(&sl->w1_slave_entry); w1_slave_detach(sl); kfree(sl); } + w1_destroy_master_attributes(dev); + atomic_dec(&dev->refcnt); + continue; + } + + if (test_bit(W1_MASTER_NEED_RECONNECT, &dev->flags)) { + dev_info(&dev->dev, "Reconnecting slaves in device %s.\n", dev->name); + down(&dev->mutex); + list_for_each_entry(sl, &dev->slist, w1_slave_entry) { + if (sl->family->fid == W1_FAMILY_DEFAULT) { + struct w1_reg_num rn; + list_del(&sl->w1_slave_entry); + w1_slave_detach(sl); + + memcpy(&rn, &sl->reg_num, sizeof(rn)); + + kfree(sl); + + w1_attach_slave_device(dev, &rn); + } + } + clear_bit(W1_MASTER_NEED_RECONNECT, &dev->flags); + up(&dev->mutex); } - w1_destroy_master_attributes(dev); - atomic_dec(&dev->refcnt); } } @@ -720,51 +719,50 @@ int w1_control(void *data) int w1_process(void *data) { struct w1_master *dev = (struct w1_master *) data; - struct list_head *ent, *n; - struct w1_slave *sl; + struct w1_slave *sl, *sln; daemonize("%s", dev->name); allow_signal(SIGTERM); - while (!dev->need_exit) { - try_to_freeze(PF_FREEZE); + while (!test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) { + try_to_freeze(); msleep_interruptible(w1_timeout * 1000); if (signal_pending(current)) flush_signals(current); - if (dev->need_exit) + if (test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) break; if (!dev->initialized) continue; + if (dev->search_count == 0) + continue; + if (down_interruptible(&dev->mutex)) continue; - list_for_each_safe(ent, n, &dev->slist) { - sl = list_entry(ent, struct w1_slave, w1_slave_entry); + list_for_each_entry(sl, &dev->slist, w1_slave_entry) + clear_bit(W1_SLAVE_ACTIVE, (long *)&sl->flags); - if (sl) - clear_bit(W1_SLAVE_ACTIVE, (long *)&sl->flags); - } - w1_search_devices(dev, w1_slave_found); - list_for_each_safe(ent, n, &dev->slist) { - sl = list_entry(ent, struct w1_slave, w1_slave_entry); - - if (sl && !test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags) && !--sl->ttl) { + list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { + if (!test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags) && !--sl->ttl) { list_del (&sl->w1_slave_entry); w1_slave_detach (sl); kfree (sl); dev->slave_count--; - } - else if (test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags)) + } else if (test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags)) sl->ttl = dev->slave_ttl; } + + if (dev->search_count > 0) + dev->search_count--; + up(&dev->mutex); } @@ -774,7 +772,7 @@ int w1_process(void *data) return 0; } -int w1_init(void) +static int w1_init(void) { int retval; @@ -814,18 +812,14 @@ err_out_exit_init: return retval; } -void w1_fini(void) +static void w1_fini(void) { struct w1_master *dev; - struct list_head *ent, *n; - list_for_each_safe(ent, n, &w1_masters) { - dev = list_entry(ent, struct w1_master, w1_master_entry); + list_for_each_entry(dev, &w1_masters, w1_master_entry) __w1_remove_master_device(dev); - } control_needs_exit = 1; - wait_for_completion(&w1_control_complete); driver_unregister(&w1_driver); diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h index abbddaf3f8e2..4f0a986e33e3 100644 --- a/drivers/w1/w1.h +++ b/drivers/w1/w1.h @@ -1,8 +1,8 @@ /* - * w1.h + * w1.h * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -74,36 +74,86 @@ struct w1_slave int ttl; struct w1_master *master; - struct w1_family *family; - struct device dev; - struct completion dev_released; + struct w1_family *family; + struct device dev; + struct completion dev_released; - struct bin_attribute attr_bin; - struct device_attribute attr_name, attr_val; + struct bin_attribute attr_bin; + struct device_attribute attr_name; }; typedef void (* w1_slave_found_callback)(unsigned long, u64); + +/** + * Note: read_bit and write_bit are very low level functions and should only + * be used with hardware that doesn't really support 1-wire operations, + * like a parallel/serial port. + * Either define read_bit and write_bit OR define, at minimum, touch_bit and + * reset_bus. + */ struct w1_bus_master { - unsigned long data; - - u8 (*read_bit)(unsigned long); - void (*write_bit)(unsigned long, u8); - - u8 (*read_byte)(unsigned long); - void (*write_byte)(unsigned long, u8); - - u8 (*read_block)(unsigned long, u8 *, int); - void (*write_block)(unsigned long, u8 *, int); - - u8 (*touch_bit)(unsigned long, u8); - - u8 (*reset_bus)(unsigned long); - - void (*search)(unsigned long, w1_slave_found_callback); + /** the first parameter in all the functions below */ + unsigned long data; + + /** + * Sample the line level + * @return the level read (0 or 1) + */ + u8 (*read_bit)(unsigned long); + + /** Sets the line level */ + void (*write_bit)(unsigned long, u8); + + /** + * touch_bit is the lowest-level function for devices that really + * support the 1-wire protocol. + * touch_bit(0) = write-0 cycle + * touch_bit(1) = write-1 / read cycle + * @return the bit read (0 or 1) + */ + u8 (*touch_bit)(unsigned long, u8); + + /** + * Reads a bytes. Same as 8 touch_bit(1) calls. + * @return the byte read + */ + u8 (*read_byte)(unsigned long); + + /** + * Writes a byte. Same as 8 touch_bit(x) calls. + */ + void (*write_byte)(unsigned long, u8); + + /** + * Same as a series of read_byte() calls + * @return the number of bytes read + */ + u8 (*read_block)(unsigned long, u8 *, int); + + /** Same as a series of write_byte() calls */ + void (*write_block)(unsigned long, const u8 *, int); + + /** + * Combines two reads and a smart write for ROM searches + * @return bit0=Id bit1=comp_id bit2=dir_taken + */ + u8 (*triplet)(unsigned long, u8); + + /** + * long write-0 with a read for the presence pulse detection + * @return -1=Error, 0=Device present, 1=No device present + */ + u8 (*reset_bus)(unsigned long); + + /** Really nice hardware can handles the ROM searches */ + void (*search)(unsigned long, w1_slave_found_callback); }; +#define W1_MASTER_NEED_EXIT 0 +#define W1_MASTER_NEED_RECONNECT 1 + struct w1_master { struct list_head w1_master_entry; @@ -115,30 +165,31 @@ struct w1_master int slave_ttl; int initialized; u32 id; + int search_count; atomic_t refcnt; void *priv; int priv_size; - int need_exit; + long flags; + pid_t kpid; - struct semaphore mutex; + struct semaphore mutex; struct device_driver *driver; - struct device dev; - struct completion dev_released; - struct completion dev_exited; + struct device dev; + struct completion dev_released; + struct completion dev_exited; struct w1_bus_master *bus_master; u32 seq, groups; - struct sock *nls; + struct sock *nls; }; int w1_create_master_attributes(struct w1_master *); -void w1_destroy_master_attributes(struct w1_master *); -void w1_search(struct w1_master *dev); +void w1_search(struct w1_master *dev, w1_slave_found_callback cb); #endif /* __KERNEL__ */ diff --git a/drivers/w1/w1_family.c b/drivers/w1/w1_family.c index d1d56eca1061..02eee57d3c0c 100644 --- a/drivers/w1/w1_family.c +++ b/drivers/w1/w1_family.c @@ -1,8 +1,8 @@ /* - * w1_family.c + * w1_family.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -27,10 +27,11 @@ DEFINE_SPINLOCK(w1_flock); static LIST_HEAD(w1_families); +extern void w1_reconnect_slaves(struct w1_family *f); static int w1_check_family(struct w1_family *f) { - if (!f->fops->rname || !f->fops->rbin || !f->fops->rval || !f->fops->rvalname) + if (!f->fops->rname || !f->fops->rbin) return -EINVAL; return 0; @@ -60,9 +61,10 @@ int w1_register_family(struct w1_family *newf) newf->need_exit = 0; list_add_tail(&newf->family_entry, &w1_families); } - spin_unlock(&w1_flock); + w1_reconnect_slaves(newf); + return ret; } diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h index 03a2de7a601f..b26da01bbc38 100644 --- a/drivers/w1/w1_family.h +++ b/drivers/w1/w1_family.h @@ -1,8 +1,8 @@ /* - * w1_family.h + * w1_family.h * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -27,27 +27,27 @@ #include <asm/atomic.h> #define W1_FAMILY_DEFAULT 0 -#define W1_FAMILY_THERM 0x10 -#define W1_FAMILY_SMEM 0x01 +#define W1_FAMILY_SMEM_01 0x01 +#define W1_FAMILY_SMEM_81 0x81 +#define W1_THERM_DS18S20 0x10 +#define W1_THERM_DS1822 0x22 +#define W1_THERM_DS18B20 0x28 #define MAXNAMELEN 32 struct w1_family_ops { - ssize_t (* rname)(struct device *, char *); + ssize_t (* rname)(struct device *, struct device_attribute *, char *); ssize_t (* rbin)(struct kobject *, char *, loff_t, size_t); - - ssize_t (* rval)(struct device *, char *); - unsigned char rvalname[MAXNAMELEN]; }; struct w1_family { struct list_head family_entry; u8 fid; - + struct w1_family_ops *fops; - + atomic_t refcnt; u8 need_exit; }; diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c index 5f0bafbbd575..35e85d961702 100644 --- a/drivers/w1/w1_int.c +++ b/drivers/w1/w1_int.c @@ -1,8 +1,8 @@ /* - * w1_int.c + * w1_int.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -39,8 +39,9 @@ extern spinlock_t w1_mlock; extern int w1_process(void *); -struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, - struct device_driver *driver, struct device *device) +static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, + struct device_driver *driver, + struct device *device) { struct w1_master *dev; int err; @@ -60,14 +61,15 @@ struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, dev->bus_master = (struct w1_bus_master *)(dev + 1); - dev->owner = THIS_MODULE; - dev->max_slave_count = slave_count; - dev->slave_count = 0; - dev->attempts = 0; - dev->kpid = -1; - dev->initialized = 0; - dev->id = id; + dev->owner = THIS_MODULE; + dev->max_slave_count = slave_count; + dev->slave_count = 0; + dev->attempts = 0; + dev->kpid = -1; + dev->initialized = 0; + dev->id = id; dev->slave_ttl = slave_ttl; + dev->search_count = -1; /* continual scan */ atomic_set(&dev->refcnt, 2); @@ -105,7 +107,7 @@ struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, return dev; } -void w1_free_dev(struct w1_master *dev) +static void w1_free_dev(struct w1_master *dev) { device_unregister(&dev->dev); if (dev->nls && dev->nls->sk_socket) @@ -120,6 +122,13 @@ int w1_add_master_device(struct w1_bus_master *master) int retval = 0; struct w1_netlink_msg msg; + /* validate minimum functionality */ + if (!(master->touch_bit && master->reset_bus) && + !(master->write_bit && master->read_bit)) { + printk(KERN_ERR "w1_add_master_device: invalid function set\n"); + return(-EINVAL); + } + dev = w1_alloc_dev(w1_ids++, w1_max_slave_count, w1_max_slave_ttl, &w1_driver, &w1_device); if (!dev) return -ENOMEM; @@ -153,7 +162,7 @@ int w1_add_master_device(struct w1_bus_master *master) return 0; err_out_kill_thread: - dev->need_exit = 1; + set_bit(W1_MASTER_NEED_EXIT, &dev->flags); if (kill_proc(dev->kpid, SIGTERM, 1)) dev_err(&dev->dev, "Failed to send signal to w1 kernel thread %d.\n", @@ -171,7 +180,7 @@ void __w1_remove_master_device(struct w1_master *dev) int err; struct w1_netlink_msg msg; - dev->need_exit = 1; + set_bit(W1_MASTER_NEED_EXIT, &dev->flags); err = kill_proc(dev->kpid, SIGTERM, 1); if (err) dev_err(&dev->dev, @@ -197,10 +206,8 @@ void __w1_remove_master_device(struct w1_master *dev) void w1_remove_master_device(struct w1_bus_master *bm) { struct w1_master *dev = NULL; - struct list_head *ent, *n; - list_for_each_safe(ent, n, &w1_masters) { - dev = list_entry(ent, struct w1_master, w1_master_entry); + list_for_each_entry(dev, &w1_masters, w1_master_entry) { if (!dev->initialized) continue; diff --git a/drivers/w1/w1_int.h b/drivers/w1/w1_int.h index fdb531e87faa..4274082d2262 100644 --- a/drivers/w1/w1_int.h +++ b/drivers/w1/w1_int.h @@ -1,8 +1,8 @@ /* - * w1_int.h + * w1_int.h * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -27,8 +27,6 @@ #include "w1.h" -struct w1_master * w1_alloc_dev(u32, int, int, struct device_driver *, struct device *); -void w1_free_dev(struct w1_master *dev); int w1_add_master_device(struct w1_bus_master *); void w1_remove_master_device(struct w1_bus_master *); void __w1_remove_master_device(struct w1_master *); diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c index 02796b5a39f6..00f032220173 100644 --- a/drivers/w1/w1_io.c +++ b/drivers/w1/w1_io.c @@ -1,8 +1,8 @@ /* - * w1_io.c + * w1_io.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -55,15 +55,29 @@ void w1_delay(unsigned long tm) udelay(tm * w1_delay_parm); } +static void w1_write_bit(struct w1_master *dev, int bit); +static u8 w1_read_bit(struct w1_master *dev); + +/** + * Generates a write-0 or write-1 cycle and samples the level. + */ u8 w1_touch_bit(struct w1_master *dev, int bit) { if (dev->bus_master->touch_bit) return dev->bus_master->touch_bit(dev->bus_master->data, bit); - else + else if (bit) return w1_read_bit(dev); + else { + w1_write_bit(dev, 0); + return(0); + } } -void w1_write_bit(struct w1_master *dev, int bit) +/** + * Generates a write-0 or write-1 cycle. + * Only call if dev->bus_master->touch_bit is NULL + */ +static void w1_write_bit(struct w1_master *dev, int bit) { if (bit) { dev->bus_master->write_bit(dev->bus_master->data, 0); @@ -78,6 +92,12 @@ void w1_write_bit(struct w1_master *dev, int bit) } } +/** + * Writes 8 bits. + * + * @param dev the master device + * @param byte the byte to write + */ void w1_write_8(struct w1_master *dev, u8 byte) { int i; @@ -86,10 +106,15 @@ void w1_write_8(struct w1_master *dev, u8 byte) dev->bus_master->write_byte(dev->bus_master->data, byte); else for (i = 0; i < 8; ++i) - w1_write_bit(dev, (byte >> i) & 0x1); + w1_touch_bit(dev, (byte >> i) & 0x1); } -u8 w1_read_bit(struct w1_master *dev) + +/** + * Generates a write-1 cycle and samples the level. + * Only call if dev->bus_master->touch_bit is NULL + */ +static u8 w1_read_bit(struct w1_master *dev) { int result; @@ -104,6 +129,53 @@ u8 w1_read_bit(struct w1_master *dev) return result & 0x1; } +/** + * Does a triplet - used for searching ROM addresses. + * Return bits: + * bit 0 = id_bit + * bit 1 = comp_bit + * bit 2 = dir_taken + * If both bits 0 & 1 are set, the search should be restarted. + * + * @param dev the master device + * @param bdir the bit to write if both id_bit and comp_bit are 0 + * @return bit fields - see above + */ +u8 w1_triplet(struct w1_master *dev, int bdir) +{ + if ( dev->bus_master->triplet ) + return(dev->bus_master->triplet(dev->bus_master->data, bdir)); + else { + u8 id_bit = w1_touch_bit(dev, 1); + u8 comp_bit = w1_touch_bit(dev, 1); + u8 retval; + + if ( id_bit && comp_bit ) + return(0x03); /* error */ + + if ( !id_bit && !comp_bit ) { + /* Both bits are valid, take the direction given */ + retval = bdir ? 0x04 : 0; + } else { + /* Only one bit is valid, take that direction */ + bdir = id_bit; + retval = id_bit ? 0x05 : 0x02; + } + + if ( dev->bus_master->touch_bit ) + w1_touch_bit(dev, bdir); + else + w1_write_bit(dev, bdir); + return(retval); + } +} + +/** + * Reads 8 bits. + * + * @param dev the master device + * @return the byte read + */ u8 w1_read_8(struct w1_master * dev) { int i; @@ -113,12 +185,20 @@ u8 w1_read_8(struct w1_master * dev) res = dev->bus_master->read_byte(dev->bus_master->data); else for (i = 0; i < 8; ++i) - res |= (w1_read_bit(dev) << i); + res |= (w1_touch_bit(dev,1) << i); return res; } -void w1_write_block(struct w1_master *dev, u8 *buf, int len) +/** + * Writes a series of bytes. + * + * @param dev the master device + * @param buf pointer to the data to write + * @param len the number of bytes to write + * @return the byte read + */ +void w1_write_block(struct w1_master *dev, const u8 *buf, int len) { int i; @@ -129,6 +209,14 @@ void w1_write_block(struct w1_master *dev, u8 *buf, int len) w1_write_8(dev, buf[i]); } +/** + * Reads a series of bytes. + * + * @param dev the master device + * @param buf pointer to the buffer to fill + * @param len the number of bytes to read + * @return the number of bytes read + */ u8 w1_read_block(struct w1_master *dev, u8 *buf, int len) { int i; @@ -145,9 +233,15 @@ u8 w1_read_block(struct w1_master *dev, u8 *buf, int len) return ret; } +/** + * Issues a reset bus sequence. + * + * @param dev The bus master pointer + * @return 0=Device present, 1=No device present or error + */ int w1_reset_bus(struct w1_master *dev) { - int result = 0; + int result; if (dev->bus_master->reset_bus) result = dev->bus_master->reset_bus(dev->bus_master->data) & 0x1; @@ -180,12 +274,11 @@ void w1_search_devices(struct w1_master *dev, w1_slave_found_callback cb) if (dev->bus_master->search) dev->bus_master->search(dev->bus_master->data, cb); else - w1_search(dev); + w1_search(dev, cb); } -EXPORT_SYMBOL(w1_write_bit); +EXPORT_SYMBOL(w1_touch_bit); EXPORT_SYMBOL(w1_write_8); -EXPORT_SYMBOL(w1_read_bit); EXPORT_SYMBOL(w1_read_8); EXPORT_SYMBOL(w1_reset_bus); EXPORT_SYMBOL(w1_calc_crc8); diff --git a/drivers/w1/w1_io.h b/drivers/w1/w1_io.h index 6c573005a712..af5829778aaa 100644 --- a/drivers/w1/w1_io.h +++ b/drivers/w1/w1_io.h @@ -1,8 +1,8 @@ /* - * w1_io.h + * w1_io.h * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 @@ -26,13 +26,12 @@ void w1_delay(unsigned long); u8 w1_touch_bit(struct w1_master *, int); -void w1_write_bit(struct w1_master *, int); +u8 w1_triplet(struct w1_master *dev, int bdir); void w1_write_8(struct w1_master *, u8); -u8 w1_read_bit(struct w1_master *); u8 w1_read_8(struct w1_master *); int w1_reset_bus(struct w1_master *); u8 w1_calc_crc8(u8 *, int); -void w1_write_block(struct w1_master *, u8 *, int); +void w1_write_block(struct w1_master *, const u8 *, int); u8 w1_read_block(struct w1_master *, u8 *, int); void w1_search_devices(struct w1_master *dev, w1_slave_found_callback cb); diff --git a/drivers/w1/w1_log.h b/drivers/w1/w1_log.h index a6bf6f44dce2..fe6bdf43380f 100644 --- a/drivers/w1/w1_log.h +++ b/drivers/w1/w1_log.h @@ -1,8 +1,8 @@ /* - * w1_log.h + * w1_log.h * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * 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 diff --git a/drivers/w1/w1_netlink.h b/drivers/w1/w1_netlink.h index ea1b530abad0..8615756946df 100644 --- a/drivers/w1/w1_netlink.h +++ b/drivers/w1/w1_netlink.h @@ -33,13 +33,13 @@ enum w1_netlink_message_types { W1_MASTER_REMOVE, }; -struct w1_netlink_msg +struct w1_netlink_msg { __u8 type; __u8 reserved[3]; union { - struct w1_reg_num id; + struct w1_reg_num id; __u64 w1_id; struct { diff --git a/drivers/w1/w1_smem.c b/drivers/w1/w1_smem.c index a54e425217a0..70d2d469963c 100644 --- a/drivers/w1/w1_smem.c +++ b/drivers/w1/w1_smem.c @@ -1,8 +1,8 @@ /* - * w1_smem.c + * w1_smem.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * This program is free software; you can redistribute it and/or modify * it under the smems of the GNU General Public License as published by @@ -36,41 +36,25 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>"); MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, 64bit memory family."); -static ssize_t w1_smem_read_name(struct device *, char *); -static ssize_t w1_smem_read_val(struct device *, char *); +static ssize_t w1_smem_read_name(struct device *, struct device_attribute *attr, char *); static ssize_t w1_smem_read_bin(struct kobject *, char *, loff_t, size_t); static struct w1_family_ops w1_smem_fops = { .rname = &w1_smem_read_name, .rbin = &w1_smem_read_bin, - .rval = &w1_smem_read_val, - .rvalname = "id", }; -static ssize_t w1_smem_read_name(struct device *dev, char *buf) +static ssize_t w1_smem_read_name(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_slave *sl = container_of(dev, struct w1_slave, dev); return sprintf(buf, "%s\n", sl->name); } -static ssize_t w1_smem_read_val(struct device *dev, char *buf) -{ - struct w1_slave *sl = container_of(dev, struct w1_slave, dev); - int i; - ssize_t count = 0; - - for (i = 0; i < 8; ++i) - count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]); - count += sprintf(buf + count, "\n"); - - return count; -} - static ssize_t w1_smem_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count) { struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj), - struct w1_slave, dev); + struct w1_slave, dev); int i; atomic_inc(&sl->refcnt); @@ -90,7 +74,7 @@ static ssize_t w1_smem_read_bin(struct kobject *kobj, char *buf, loff_t off, siz for (i = 0; i < 8; ++i) count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]); count += sprintf(buf + count, "\n"); - + out: up(&sl->master->mutex); out_dec: @@ -99,19 +83,37 @@ out_dec: return count; } -static struct w1_family w1_smem_family = { - .fid = W1_FAMILY_SMEM, +static struct w1_family w1_smem_family_01 = { + .fid = W1_FAMILY_SMEM_01, + .fops = &w1_smem_fops, +}; + +static struct w1_family w1_smem_family_81 = { + .fid = W1_FAMILY_SMEM_81, .fops = &w1_smem_fops, }; static int __init w1_smem_init(void) { - return w1_register_family(&w1_smem_family); + int err; + + err = w1_register_family(&w1_smem_family_01); + if (err) + return err; + + err = w1_register_family(&w1_smem_family_81); + if (err) { + w1_unregister_family(&w1_smem_family_01); + return err; + } + + return 0; } static void __exit w1_smem_fini(void) { - w1_unregister_family(&w1_smem_family); + w1_unregister_family(&w1_smem_family_01); + w1_unregister_family(&w1_smem_family_81); } module_init(w1_smem_init); diff --git a/drivers/w1/w1_therm.c b/drivers/w1/w1_therm.c index 0b1817890503..165526c9360a 100644 --- a/drivers/w1/w1_therm.c +++ b/drivers/w1/w1_therm.c @@ -1,8 +1,8 @@ /* - * w1_therm.c + * w1_therm.c * * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> - * + * * * This program is free software; you can redistribute it and/or modify * it under the therms of the GNU General Public License as published by @@ -38,31 +38,78 @@ MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>"); MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, temperature family."); static u8 bad_roms[][9] = { - {0xaa, 0x00, 0x4b, 0x46, 0xff, 0xff, 0x0c, 0x10, 0x87}, + {0xaa, 0x00, 0x4b, 0x46, 0xff, 0xff, 0x0c, 0x10, 0x87}, {} }; -static ssize_t w1_therm_read_name(struct device *, char *); -static ssize_t w1_therm_read_temp(struct device *, char *); +static ssize_t w1_therm_read_name(struct device *, struct device_attribute *attr, char *); static ssize_t w1_therm_read_bin(struct kobject *, char *, loff_t, size_t); static struct w1_family_ops w1_therm_fops = { .rname = &w1_therm_read_name, .rbin = &w1_therm_read_bin, - .rval = &w1_therm_read_temp, - .rvalname = "temp1_input", }; -static ssize_t w1_therm_read_name(struct device *dev, char *buf) +static struct w1_family w1_therm_family_DS18S20 = { + .fid = W1_THERM_DS18S20, + .fops = &w1_therm_fops, +}; + +static struct w1_family w1_therm_family_DS18B20 = { + .fid = W1_THERM_DS18B20, + .fops = &w1_therm_fops, +}; +static struct w1_family w1_therm_family_DS1822 = { + .fid = W1_THERM_DS1822, + .fops = &w1_therm_fops, +}; + +struct w1_therm_family_converter +{ + u8 broken; + u16 reserved; + struct w1_family *f; + int (*convert)(u8 rom[9]); +}; + +static inline int w1_DS18B20_convert_temp(u8 rom[9]); +static inline int w1_DS18S20_convert_temp(u8 rom[9]); + +static struct w1_therm_family_converter w1_therm_families[] = { + { + .f = &w1_therm_family_DS18S20, + .convert = w1_DS18S20_convert_temp + }, + { + .f = &w1_therm_family_DS1822, + .convert = w1_DS18B20_convert_temp + }, + { + .f = &w1_therm_family_DS18B20, + .convert = w1_DS18B20_convert_temp + }, +}; + +static ssize_t w1_therm_read_name(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_slave *sl = container_of(dev, struct w1_slave, dev); return sprintf(buf, "%s\n", sl->name); } -static inline int w1_convert_temp(u8 rom[9]) +static inline int w1_DS18B20_convert_temp(u8 rom[9]) +{ + int t = (rom[1] << 8) | rom[0]; + t /= 16; + return t; +} + +static inline int w1_DS18S20_convert_temp(u8 rom[9]) { int t, h; + + if (!rom[7]) + return 0; if (rom[1] == 0) t = ((s32)rom[0] >> 1)*1000; @@ -77,11 +124,15 @@ static inline int w1_convert_temp(u8 rom[9]) return t; } -static ssize_t w1_therm_read_temp(struct device *dev, char *buf) +static inline int w1_convert_temp(u8 rom[9], u8 fid) { - struct w1_slave *sl = container_of(dev, struct w1_slave, dev); + int i; + + for (i=0; i<sizeof(w1_therm_families)/sizeof(w1_therm_families[0]); ++i) + if (w1_therm_families[i].f->fid == fid) + return w1_therm_families[i].convert(rom); - return sprintf(buf, "%d\n", w1_convert_temp(sl->rom)); + return 0; } static int w1_therm_check_rom(u8 rom[9]) @@ -98,7 +149,7 @@ static int w1_therm_check_rom(u8 rom[9]) static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count) { struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj), - struct w1_slave, dev); + struct w1_slave, dev); struct w1_master *dev = sl->master; u8 rom[9], crc, verdict; int i, max_trying = 10; @@ -133,7 +184,7 @@ static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, si unsigned int tm = 750; memcpy(&match[1], (u64 *) & sl->reg_num, 8); - + w1_write_block(dev, match, 9); w1_write_8(dev, W1_CONVERT_TEMP); @@ -146,7 +197,7 @@ static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, si if (!w1_reset_bus (dev)) { w1_write_block(dev, match, 9); - + w1_write_8(dev, W1_READ_SCRATCHPAD); if ((count = w1_read_block(dev, rom, 9)) != 9) { dev_warn(&dev->dev, "w1_read_block() returned %d instead of 9.\n", count); @@ -176,7 +227,7 @@ static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, si for (i = 0; i < 9; ++i) count += sprintf(buf + count, "%02x ", sl->rom[i]); - count += sprintf(buf + count, "t=%d\n", w1_convert_temp(rom)); + count += sprintf(buf + count, "t=%d\n", w1_convert_temp(rom, sl->family->fid)); out: up(&dev->mutex); out_dec: @@ -186,19 +237,26 @@ out_dec: return count; } -static struct w1_family w1_therm_family = { - .fid = W1_FAMILY_THERM, - .fops = &w1_therm_fops, -}; - static int __init w1_therm_init(void) { - return w1_register_family(&w1_therm_family); + int err, i; + + for (i=0; i<sizeof(w1_therm_families)/sizeof(w1_therm_families[0]); ++i) { + err = w1_register_family(w1_therm_families[i].f); + if (err) + w1_therm_families[i].broken = 1; + } + + return 0; } static void __exit w1_therm_fini(void) { - w1_unregister_family(&w1_therm_family); + int i; + + for (i=0; i<sizeof(w1_therm_families)/sizeof(w1_therm_families[0]); ++i) + if (!w1_therm_families[i].broken) + w1_unregister_family(w1_therm_families[i].f); } module_init(w1_therm_init); |