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Release 4.11 drivers/w1/slaves/w1_ds2760.c

/*
 * 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; }

Contributors

PersonTokensPropCommitsCommitProp
Anton Vorontsov18498.92%150.00%
Neil Brown21.08%150.00%
Total186100.00%2100.00%


int w1_ds2760_read(struct device *dev, char *buf, int addr, size_t count) { return w1_ds2760_io(dev, buf, addr, count, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Anton Vorontsov34100.00%1100.00%
Total34100.00%1100.00%


int w1_ds2760_write(struct device *dev, char *buf, int addr, size_t count) { return w1_ds2760_io(dev, buf, addr, count, 1); }

Contributors

PersonTokensPropCommitsCommitProp
Anton Vorontsov34100.00%1100.00%
Total34100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Mack9197.85%150.00%
Neil Brown22.15%150.00%
Total93100.00%2100.00%


int w1_ds2760_store_eeprom(struct device *dev, int addr) { return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_COPY_DATA); }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Mack23100.00%1100.00%
Total23100.00%1100.00%


int w1_ds2760_recall_eeprom(struct device *dev, int addr) { return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_RECALL_DATA); }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Mack23100.00%1100.00%
Total23100.00%1100.00%


static ssize_t w1_slave_read(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); }

Contributors

PersonTokensPropCommitsCommitProp
Anton Vorontsov4781.03%125.00%
Andrew Morton58.62%125.00%
Chris Wright58.62%125.00%
Greg Kroah-Hartman11.72%125.00%
Total58100.00%4100.00%

static BIN_ATTR_RO(w1_slave, DS2760_DATA_SIZE); static struct bin_attribute *w1_ds2760_bin_attrs[] = { &bin_attr_w1_slave, NULL, }; static const struct attribute_group w1_ds2760_group = { .bin_attrs = w1_ds2760_bin_attrs, }; static const struct attribute_group *w1_ds2760_groups[] = { &w1_ds2760_group, NULL, };
static int w1_ds2760_add_slave(struct w1_slave *sl) { int ret; struct platform_device *pdev; pdev = platform_device_alloc("ds2760-battery", PLATFORM_DEVID_AUTO); if (!pdev) return -ENOMEM; pdev->dev.parent = &sl->dev; ret = platform_device_add(pdev); if (ret) goto pdev_add_failed; dev_set_drvdata(&sl->dev, pdev); return 0; pdev_add_failed: platform_device_put(pdev); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Anton Vorontsov7891.76%133.33%
Andrew F. Davis67.06%133.33%
Wei Yongjun11.18%133.33%
Total85100.00%3100.00%


static void w1_ds2760_remove_slave(struct w1_slave *sl) { struct platform_device *pdev = dev_get_drvdata(&sl->dev); platform_device_unregister(pdev); }

Contributors

PersonTokensPropCommitsCommitProp
Anton Vorontsov29100.00%1100.00%
Total29100.00%1100.00%

static struct w1_family_ops w1_ds2760_fops = { .add_slave = w1_ds2760_add_slave, .remove_slave = w1_ds2760_remove_slave, .groups = w1_ds2760_groups, }; static struct w1_family w1_ds2760_family = { .fid = W1_FAMILY_DS2760, .fops = &w1_ds2760_fops, }; module_w1_family(w1_ds2760_family); EXPORT_SYMBOL(w1_ds2760_read); EXPORT_SYMBOL(w1_ds2760_write); EXPORT_SYMBOL(w1_ds2760_store_eeprom); EXPORT_SYMBOL(w1_ds2760_recall_eeprom); 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));

Overall Contributors

PersonTokensPropCommitsCommitProp
Anton Vorontsov51569.50%19.09%
Daniel Mack14719.84%19.09%
Greg Kroah-Hartman456.07%19.09%
Alexander Stein91.21%19.09%
Andrew F. Davis70.94%218.18%
Andrew Morton50.67%19.09%
Chris Wright50.67%19.09%
Neil Brown40.54%19.09%
Tejun Heo30.40%19.09%
Wei Yongjun10.13%19.09%
Total741100.00%11100.00%
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