diff options
Diffstat (limited to 'drivers/w1/slaves/w1_ds2760.c')
| -rw-r--r-- | drivers/w1/slaves/w1_ds2760.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/drivers/w1/slaves/w1_ds2760.c b/drivers/w1/slaves/w1_ds2760.c deleted file mode 100644 index 93719d25d849..000000000000 --- a/drivers/w1/slaves/w1_ds2760.c +++ /dev/null @@ -1,206 +0,0 @@ -/* - * 1-Wire implementation for the ds2760 chip - * - * Copyright © 2004-2005, Szabolcs Gyurko <szabolcs.gyurko@tlt.hu> - * - * Use consistent with the GNU GPL is permitted, - * provided that this copyright notice is - * preserved in its entirety in all copies and derived works. - * - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/device.h> -#include <linux/types.h> -#include <linux/platform_device.h> -#include <linux/mutex.h> -#include <linux/idr.h> -#include <linux/gfp.h> - -#include "../w1.h" -#include "../w1_int.h" -#include "../w1_family.h" -#include "w1_ds2760.h" - -static int w1_ds2760_io(struct device *dev, char *buf, int addr, size_t count, - int io) -{ - struct w1_slave *sl = container_of(dev, struct w1_slave, dev); - - if (!dev) - return 0; - - mutex_lock(&sl->master->bus_mutex); - - if (addr > DS2760_DATA_SIZE || addr < 0) { - count = 0; - goto out; - } - if (addr + count > DS2760_DATA_SIZE) - count = DS2760_DATA_SIZE - addr; - - if (!w1_reset_select_slave(sl)) { - if (!io) { - w1_write_8(sl->master, W1_DS2760_READ_DATA); - w1_write_8(sl->master, addr); - count = w1_read_block(sl->master, buf, count); - } else { - w1_write_8(sl->master, W1_DS2760_WRITE_DATA); - w1_write_8(sl->master, addr); - w1_write_block(sl->master, buf, count); - /* XXX w1_write_block returns void, not n_written */ - } - } - -out: - mutex_unlock(&sl->master->bus_mutex); - - return count; -} - -int w1_ds2760_read(struct device *dev, char *buf, int addr, size_t count) -{ - return w1_ds2760_io(dev, buf, addr, count, 0); -} - -int w1_ds2760_write(struct device *dev, char *buf, int addr, size_t count) -{ - return w1_ds2760_io(dev, buf, addr, count, 1); -} - -static int w1_ds2760_eeprom_cmd(struct device *dev, int addr, int cmd) -{ - struct w1_slave *sl = container_of(dev, struct w1_slave, dev); - - if (!dev) - return -EINVAL; - - mutex_lock(&sl->master->bus_mutex); - - if (w1_reset_select_slave(sl) == 0) { - w1_write_8(sl->master, cmd); - w1_write_8(sl->master, addr); - } - - mutex_unlock(&sl->master->bus_mutex); - return 0; -} - -int w1_ds2760_store_eeprom(struct device *dev, int addr) -{ - return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_COPY_DATA); -} - -int w1_ds2760_recall_eeprom(struct device *dev, int addr) -{ - return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_RECALL_DATA); -} - -static ssize_t w1_ds2760_read_bin(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t count) -{ - struct device *dev = container_of(kobj, struct device, kobj); - return w1_ds2760_read(dev, buf, off, count); -} - -static struct bin_attribute w1_ds2760_bin_attr = { - .attr = { - .name = "w1_slave", - .mode = S_IRUGO, - }, - .size = DS2760_DATA_SIZE, - .read = w1_ds2760_read_bin, -}; - -static DEFINE_IDA(bat_ida); - -static int w1_ds2760_add_slave(struct w1_slave *sl) -{ - int ret; - int id; - struct platform_device *pdev; - - id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL); - if (id < 0) { - ret = id; - goto noid; - } - - pdev = platform_device_alloc("ds2760-battery", id); - if (!pdev) { - ret = -ENOMEM; - goto pdev_alloc_failed; - } - pdev->dev.parent = &sl->dev; - - ret = platform_device_add(pdev); - if (ret) - goto pdev_add_failed; - - ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr); - if (ret) - goto bin_attr_failed; - - dev_set_drvdata(&sl->dev, pdev); - - goto success; - -bin_attr_failed: - platform_device_del(pdev); -pdev_add_failed: - platform_device_put(pdev); -pdev_alloc_failed: - ida_simple_remove(&bat_ida, id); -noid: -success: - return ret; -} - -static void w1_ds2760_remove_slave(struct w1_slave *sl) -{ - struct platform_device *pdev = dev_get_drvdata(&sl->dev); - int id = pdev->id; - - platform_device_unregister(pdev); - ida_simple_remove(&bat_ida, id); - sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr); -} - -static struct w1_family_ops w1_ds2760_fops = { - .add_slave = w1_ds2760_add_slave, - .remove_slave = w1_ds2760_remove_slave, -}; - -static struct w1_family w1_ds2760_family = { - .fid = W1_FAMILY_DS2760, - .fops = &w1_ds2760_fops, -}; - -static int __init w1_ds2760_init(void) -{ - printk(KERN_INFO "1-Wire driver for the DS2760 battery monitor " - " chip - (c) 2004-2005, Szabolcs Gyurko\n"); - ida_init(&bat_ida); - return w1_register_family(&w1_ds2760_family); -} - -static void __exit w1_ds2760_exit(void) -{ - w1_unregister_family(&w1_ds2760_family); - ida_destroy(&bat_ida); -} - -EXPORT_SYMBOL(w1_ds2760_read); -EXPORT_SYMBOL(w1_ds2760_write); -EXPORT_SYMBOL(w1_ds2760_store_eeprom); -EXPORT_SYMBOL(w1_ds2760_recall_eeprom); - -module_init(w1_ds2760_init); -module_exit(w1_ds2760_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>"); -MODULE_DESCRIPTION("1-wire Driver Dallas 2760 battery monitor chip"); -MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_DS2760)); |