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Diffstat (limited to 'meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files')
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diff --git a/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/COPYING b/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/COPYING new file mode 100644 index 0000000..6d45519 --- /dev/null +++ b/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/Makefile b/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/Makefile new file mode 100644 index 0000000..4be7b62 --- /dev/null +++ b/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/Makefile @@ -0,0 +1,31 @@ +# Copyright 2015-present Facebook. All Rights Reserved. +# +# This program file is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +# for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program in a file named COPYING; if not, write to the +# Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, +# Boston, MA 02110-1301 USA + +obj-m := i2c_dev_sysfs.o + +SRC := $(shell pwd) + +all: + $(MAKE) -C $(KERNEL_SRC) M=$(SRC) + +modules_install: + $(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install + +clean: + rm -f *.o *~ core .depend .*.cmd *.ko *.mod.c + rm -f Module.markers Module.symvers modules.order + rm -rf .tmp_versions Modules.symvers diff --git a/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/i2c_dev_sysfs.c b/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/i2c_dev_sysfs.c new file mode 100644 index 0000000..96c1b98 --- /dev/null +++ b/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/i2c_dev_sysfs.c @@ -0,0 +1,349 @@ +/* + * i2c_dev_sysfs.c - The i2c device sysfs library + * + * Copyright 2015-present Facebook. All Rights Reserved. + * + * 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 + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +//#define DEBUG + +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/sysfs.h> + +#include "i2c_dev_sysfs.h" + +#ifdef DEBUG + +#define PP_DEBUG(fmt, ...) do { \ + printk(KERN_DEBUG "%s:%d " fmt "\n", \ + __FUNCTION__, __LINE__, ##__VA_ARGS__); \ +} while (0) + +#else /* !DEBUG */ + +#define PP_DEBUG(fmt, ...) + +#endif + +ssize_t i2c_dev_show_label(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + i2c_sysfs_attr_st *i2c_attr = TO_I2C_SYSFS_ATTR(attr); + const i2c_dev_attr_st *dev_attr = i2c_attr->isa_i2c_attr; + + if (dev_attr->ida_help) { + return sprintf(buf, "%s\n", dev_attr->ida_help); + } + return sprintf(buf, "%s\n", dev_attr->ida_name); +} +EXPORT_SYMBOL_GPL(i2c_dev_show_label); + +int i2c_dev_read_byte(struct device *dev, + struct device_attribute *attr) +{ + struct i2c_client *client = to_i2c_client(dev); + i2c_dev_data_st *data = i2c_get_clientdata(client); + i2c_sysfs_attr_st *i2c_attr = TO_I2C_SYSFS_ATTR(attr); + const i2c_dev_attr_st *dev_attr = i2c_attr->isa_i2c_attr; + int val; + int val_mask; + + val_mask = ~(((-1) >> (dev_attr->ida_n_bits)) << (dev_attr->ida_n_bits)); + + mutex_lock(&data->idd_lock); + + val = i2c_smbus_read_byte_data(client, dev_attr->ida_reg); + + mutex_unlock(&data->idd_lock); + + if (val < 0) { + /* error case */ + return val; + } + + val = (val >> dev_attr->ida_bit_offset) & val_mask; + return val; +} +EXPORT_SYMBOL_GPL(i2c_dev_read_byte); + +int i2c_dev_read_nbytes(struct device *dev, + struct device_attribute *attr, + uint8_t values[], + int nbytes) +{ + struct i2c_client *client = to_i2c_client(dev); + i2c_dev_data_st *data = i2c_get_clientdata(client); + i2c_sysfs_attr_st *i2c_attr = TO_I2C_SYSFS_ATTR(attr); + const i2c_dev_attr_st *dev_attr = i2c_attr->isa_i2c_attr; + int i; + + mutex_lock(&data->idd_lock); + for (i = 0; i < nbytes; ++i) { + values[i] = i2c_smbus_read_byte_data(client, dev_attr->ida_reg + i); + if (values[i] < 0) { + mutex_unlock(&data->idd_lock); + return values[i]; + } + } + mutex_unlock(&data->idd_lock); + return nbytes; +} +EXPORT_SYMBOL_GPL(i2c_dev_read_nbytes); + +int i2c_dev_read_word_littleendian(struct device *dev, + struct device_attribute *attr) +{ + uint8_t values[2]; + int ret_val; + + ret_val = i2c_dev_read_nbytes(dev, attr, values, 2); + if (ret_val < 0) { + return ret_val; + } + // values[0] : LSB + // values[1] : MSB + return ((values[1]<<8) + values[0]); +} +EXPORT_SYMBOL_GPL(i2c_dev_read_word_littleendian); + +int i2c_dev_read_word_bigendian(struct device *dev, + struct device_attribute *attr) +{ + uint8_t values[2]; + int ret_val; + + ret_val = i2c_dev_read_nbytes(dev, attr, values, 2); + if (ret_val < 0) { + return ret_val; + } + // values[0] : MSB + // values[1] : LSB + return ((values[0]<<8) + values[1]); +} +EXPORT_SYMBOL_GPL(i2c_dev_read_word_bigendian); + +ssize_t i2c_dev_show_ascii(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + i2c_sysfs_attr_st *i2c_attr = TO_I2C_SYSFS_ATTR(attr); + const i2c_dev_attr_st *dev_attr = i2c_attr->isa_i2c_attr; + int nbytes, ret_val; + + nbytes = (dev_attr->ida_n_bits) / 8; + ret_val = i2c_dev_read_nbytes(dev, attr, buf, nbytes); + if (ret_val < 0) { + return ret_val; + } + //buf[] : ascii data + buf[nbytes] = '\n'; + return (nbytes + 1); +} +EXPORT_SYMBOL_GPL(i2c_dev_show_ascii); + +static ssize_t i2c_dev_sysfs_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + i2c_dev_data_st *data = i2c_get_clientdata(client); + i2c_sysfs_attr_st *i2c_attr = TO_I2C_SYSFS_ATTR(attr); + const i2c_dev_attr_st *dev_attr = i2c_attr->isa_i2c_attr; + int val; + int val_mask; + + if (!dev_attr->ida_show) { + return -EOPNOTSUPP; + } + + if (dev_attr->ida_show != I2C_DEV_ATTR_SHOW_DEFAULT) { + return dev_attr->ida_show(dev, attr, buf); + } + + val_mask = ~(((-1) >> (dev_attr->ida_n_bits)) << (dev_attr->ida_n_bits)); + + mutex_lock(&data->idd_lock); + + /* default handling */ + val = i2c_smbus_read_byte_data(client, dev_attr->ida_reg); + + mutex_unlock(&data->idd_lock); + + if (val < 0) { + /* error case */ + return val; + } + + val = (val >> dev_attr->ida_bit_offset) & val_mask; + + return scnprintf(buf, PAGE_SIZE, "0x%x%s%s\n", val, + (dev_attr->ida_help) ? "\n\nNote:\n" : "", + (dev_attr->ida_help) ? dev_attr->ida_help : ""); +} + +static ssize_t i2c_dev_sysfs_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + i2c_dev_data_st *data = i2c_get_clientdata(client); + i2c_sysfs_attr_st *i2c_attr = TO_I2C_SYSFS_ATTR(attr); + const i2c_dev_attr_st *dev_attr = i2c_attr->isa_i2c_attr; + int val; + int req_val; + int req_val_mask; + + if (!dev_attr->ida_store) { + return -EOPNOTSUPP; + } + + if (dev_attr->ida_store != I2C_DEV_ATTR_STORE_DEFAULT) { + return dev_attr->ida_store(dev, attr, buf, count); + } + + /* parse the buffer */ + if (sscanf(buf, "%i", &req_val) <= 0) { + return -EINVAL; + } + req_val_mask = ~(((-1) >> (dev_attr->ida_n_bits)) << (dev_attr->ida_n_bits)); + req_val &= req_val_mask; + + mutex_lock(&data->idd_lock); + + /* default handling, first read back the current value */ + val = i2c_smbus_read_byte_data(client, dev_attr->ida_reg); + + if (val < 0) { + /* fail to read */ + goto unlock_out; + } + + /* mask out all bits for the value requested */ + val &= ~(req_val_mask << dev_attr->ida_bit_offset); + val |= req_val << dev_attr->ida_bit_offset; + + val = i2c_smbus_write_byte_data(client, dev_attr->ida_reg, val); + + unlock_out: + mutex_unlock(&data->idd_lock); + + if (val < 0) { + /* error case */ + return val; + } + + return count; +} + +void i2c_dev_sysfs_data_clean(struct i2c_client *client, i2c_dev_data_st *data) +{ + if (!data) { + return; + } + if (data->idd_hwmon_dev) { + hwmon_device_unregister(data->idd_hwmon_dev); + } + if (data->idd_attr_group.attrs) { + sysfs_remove_group(&client->dev.kobj, &data->idd_attr_group); + kfree(data->idd_attr_group.attrs); + } + if (data->idd_attrs) { + kfree(data->idd_attrs); + } + memset(data, 0, sizeof(*data)); +} +EXPORT_SYMBOL_GPL(i2c_dev_sysfs_data_clean); + +int i2c_dev_sysfs_data_init(struct i2c_client *client, + i2c_dev_data_st *data, + const i2c_dev_attr_st *dev_attrs, + int n_attrs) +{ + int i; + int err; + i2c_sysfs_attr_st *cur_attr; + const i2c_dev_attr_st *cur_dev_attr; + struct attribute **cur_grp_attr; + + memset(data, 0, sizeof(*data)); + + i2c_set_clientdata(client, data); + mutex_init(&data->idd_lock); + + /* allocate all attribute */ + data->idd_attrs = kzalloc(sizeof(*data->idd_attrs) * n_attrs, GFP_KERNEL); + /* allocate the attribute group. +1 for the last NULL */ + data->idd_attr_group.attrs + = kzalloc(sizeof(*data->idd_attr_group.attrs) * (n_attrs + 1), GFP_KERNEL); + if (!data->idd_attrs || !data->idd_attr_group.attrs) { + err = -ENOMEM; + goto exit_cleanup; + } + PP_DEBUG("Allocated %u attributes", n_attrs); + + for (i = 0, + cur_attr = &data->idd_attrs[0], + cur_grp_attr = &data->idd_attr_group.attrs[0], + cur_dev_attr = dev_attrs; + i < n_attrs; + i++, cur_attr++, cur_grp_attr++, cur_dev_attr++) { + + mode_t mode = S_IRUGO; + if (cur_dev_attr->ida_store) { + mode |= S_IWUSR; + } + cur_attr->isa_dev_attr.attr.name = cur_dev_attr->ida_name; + cur_attr->isa_dev_attr.attr.mode = mode; + cur_attr->isa_dev_attr.show = i2c_dev_sysfs_show; + cur_attr->isa_dev_attr.store = i2c_dev_sysfs_store; + *cur_grp_attr = &cur_attr->isa_dev_attr.attr; + cur_attr->isa_i2c_attr = cur_dev_attr; + PP_DEBUG("Created attribute \"%s\"", cur_attr->isa_dev_attr.attr.name); + } + + /* Register sysfs hooks */ + if ((err = sysfs_create_group(&client->dev.kobj, &data->idd_attr_group))) { + goto exit_cleanup; + } + + data->idd_hwmon_dev = hwmon_device_register(&client->dev); + if (IS_ERR(data->idd_hwmon_dev)) { + err = PTR_ERR(data->idd_hwmon_dev); + data->idd_hwmon_dev = NULL; + goto exit_cleanup; + } + + PP_DEBUG("i2c device sysfs init data done"); + + return 0; + + exit_cleanup: + i2c_dev_sysfs_data_clean(client, data); + return err; +} +EXPORT_SYMBOL_GPL(i2c_dev_sysfs_data_init); + + +MODULE_AUTHOR("Tian Fang <tfang@fb.com>"); +MODULE_DESCRIPTION("i2c device sysfs attribute library"); +MODULE_LICENSE("GPL"); diff --git a/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/i2c_dev_sysfs.h b/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/i2c_dev_sysfs.h new file mode 100644 index 0000000..47862cc --- /dev/null +++ b/meta-raptor/meta-asus/recipes-kernel/i2c-dev-sysfs-mod/files/i2c_dev_sysfs.h @@ -0,0 +1,84 @@ +/* + * i2c_dev_sysfs.h - The i2c device sysfs library header + * + * Copyright 2015-present Facebook. All Rights Reserved. + * + * 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 + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef I2C_DEV_SYSFS_H +#define I2C_DEV_SYSFS_H + +#include <linux/device.h> +#include <linux/types.h> + +typedef ssize_t (*i2c_dev_attr_show_fn)(struct device *dev, + struct device_attribute *attr, + char *buf); +typedef ssize_t (*i2c_dev_attr_store_fn)(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count); + +#define I2C_DEV_ATTR_SHOW_DEFAULT (i2c_dev_attr_show_fn)(1) +#define I2C_DEV_ATTR_STORE_DEFAULT (i2c_dev_attr_store_fn)(1) + +typedef struct i2c_dev_attr_st_ { + const char *ida_name; + const char *ida_help; + i2c_dev_attr_show_fn ida_show; + i2c_dev_attr_store_fn ida_store; + int ida_reg; + int ida_bit_offset; + int ida_n_bits; +} i2c_dev_attr_st; + +typedef struct i2c_sysfs_attr_st_{ + struct device_attribute isa_dev_attr; + const i2c_dev_attr_st *isa_i2c_attr; +} i2c_sysfs_attr_st; + +#define TO_I2C_SYSFS_ATTR(_attr) \ + container_of(_attr, i2c_sysfs_attr_st, isa_dev_attr) + +typedef struct i2c_dev_data_st_ { + struct device *idd_hwmon_dev; + struct mutex idd_lock; + i2c_sysfs_attr_st *idd_attrs; + struct attribute_group idd_attr_group; +} i2c_dev_data_st; + +int i2c_dev_sysfs_data_init(struct i2c_client *client, + i2c_dev_data_st *data, + const i2c_dev_attr_st *dev_attrs, + int n_attrs); +void i2c_dev_sysfs_data_clean(struct i2c_client *client, i2c_dev_data_st *data); +int i2c_dev_read_byte(struct device *dev, + struct device_attribute *attr); +int i2c_dev_read_nbytes(struct device *dev, + struct device_attribute *attr, + uint8_t values[], + int nbytes); +int i2c_dev_read_word_littleendian(struct device *dev, + struct device_attribute *attr); +int i2c_dev_read_word_bigendian(struct device *dev, + struct device_attribute *attr); +ssize_t i2c_dev_show_label(struct device *dev, + struct device_attribute *attr, + char *buf); +ssize_t i2c_dev_show_ascii(struct device *dev, + struct device_attribute *attr, + char *buf); + +#endif |