mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 01:08:03 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
610
drivers/iio/inkern.c
Normal file
610
drivers/iio/inkern.c
Normal file
|
|
@ -0,0 +1,610 @@
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/* The industrial I/O core in kernel channel mapping
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*
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* Copyright (c) 2011 Jonathan Cameron
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/iio/iio.h>
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#include "iio_core.h"
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#include <linux/iio/machine.h>
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#include <linux/iio/driver.h>
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#include <linux/iio/consumer.h>
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struct iio_map_internal {
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struct iio_dev *indio_dev;
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struct iio_map *map;
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struct list_head l;
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};
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static LIST_HEAD(iio_map_list);
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static DEFINE_MUTEX(iio_map_list_lock);
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int iio_map_array_register(struct iio_dev *indio_dev, struct iio_map *maps)
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{
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int i = 0, ret = 0;
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struct iio_map_internal *mapi;
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if (maps == NULL)
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return 0;
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mutex_lock(&iio_map_list_lock);
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while (maps[i].consumer_dev_name != NULL) {
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mapi = kzalloc(sizeof(*mapi), GFP_KERNEL);
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if (mapi == NULL) {
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ret = -ENOMEM;
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goto error_ret;
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}
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mapi->map = &maps[i];
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mapi->indio_dev = indio_dev;
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list_add(&mapi->l, &iio_map_list);
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i++;
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}
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error_ret:
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mutex_unlock(&iio_map_list_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(iio_map_array_register);
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/*
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* Remove all map entries associated with the given iio device
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*/
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int iio_map_array_unregister(struct iio_dev *indio_dev)
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{
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int ret = -ENODEV;
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struct iio_map_internal *mapi;
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struct list_head *pos, *tmp;
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mutex_lock(&iio_map_list_lock);
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list_for_each_safe(pos, tmp, &iio_map_list) {
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mapi = list_entry(pos, struct iio_map_internal, l);
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if (indio_dev == mapi->indio_dev) {
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list_del(&mapi->l);
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kfree(mapi);
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ret = 0;
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}
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}
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mutex_unlock(&iio_map_list_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(iio_map_array_unregister);
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static const struct iio_chan_spec
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*iio_chan_spec_from_name(const struct iio_dev *indio_dev, const char *name)
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{
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int i;
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const struct iio_chan_spec *chan = NULL;
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for (i = 0; i < indio_dev->num_channels; i++)
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if (indio_dev->channels[i].datasheet_name &&
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strcmp(name, indio_dev->channels[i].datasheet_name) == 0) {
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chan = &indio_dev->channels[i];
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break;
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}
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return chan;
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}
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#ifdef CONFIG_OF
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static int iio_dev_node_match(struct device *dev, void *data)
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{
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return dev->of_node == data && dev->type == &iio_device_type;
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}
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static int __of_iio_channel_get(struct iio_channel *channel,
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struct device_node *np, int index)
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{
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struct device *idev;
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struct iio_dev *indio_dev;
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int err;
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struct of_phandle_args iiospec;
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err = of_parse_phandle_with_args(np, "io-channels",
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"#io-channel-cells",
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index, &iiospec);
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if (err)
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return err;
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idev = bus_find_device(&iio_bus_type, NULL, iiospec.np,
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iio_dev_node_match);
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of_node_put(iiospec.np);
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if (idev == NULL)
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return -EPROBE_DEFER;
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indio_dev = dev_to_iio_dev(idev);
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channel->indio_dev = indio_dev;
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index = iiospec.args_count ? iiospec.args[0] : 0;
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if (index >= indio_dev->num_channels) {
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err = -EINVAL;
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goto err_put;
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}
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channel->channel = &indio_dev->channels[index];
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return 0;
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err_put:
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iio_device_put(indio_dev);
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return err;
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}
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static struct iio_channel *of_iio_channel_get(struct device_node *np, int index)
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{
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struct iio_channel *channel;
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int err;
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if (index < 0)
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return ERR_PTR(-EINVAL);
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channel = kzalloc(sizeof(*channel), GFP_KERNEL);
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if (channel == NULL)
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return ERR_PTR(-ENOMEM);
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err = __of_iio_channel_get(channel, np, index);
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if (err)
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goto err_free_channel;
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return channel;
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err_free_channel:
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kfree(channel);
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return ERR_PTR(err);
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}
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static struct iio_channel *of_iio_channel_get_by_name(struct device_node *np,
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const char *name)
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{
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struct iio_channel *chan = NULL;
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/* Walk up the tree of devices looking for a matching iio channel */
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while (np) {
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int index = 0;
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/*
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* For named iio channels, first look up the name in the
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* "io-channel-names" property. If it cannot be found, the
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* index will be an error code, and of_iio_channel_get()
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* will fail.
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*/
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if (name)
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index = of_property_match_string(np, "io-channel-names",
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name);
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chan = of_iio_channel_get(np, index);
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if (!IS_ERR(chan) || PTR_ERR(chan) == -EPROBE_DEFER)
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break;
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else if (name && index >= 0) {
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pr_err("ERROR: could not get IIO channel %s:%s(%i)\n",
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np->full_name, name ? name : "", index);
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return NULL;
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}
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/*
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* No matching IIO channel found on this node.
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* If the parent node has a "io-channel-ranges" property,
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* then we can try one of its channels.
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*/
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np = np->parent;
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if (np && !of_get_property(np, "io-channel-ranges", NULL))
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return NULL;
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}
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return chan;
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}
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static struct iio_channel *of_iio_channel_get_all(struct device *dev)
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{
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struct iio_channel *chans;
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int i, mapind, nummaps = 0;
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int ret;
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do {
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ret = of_parse_phandle_with_args(dev->of_node,
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"io-channels",
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"#io-channel-cells",
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nummaps, NULL);
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if (ret < 0)
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break;
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} while (++nummaps);
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if (nummaps == 0) /* no error, return NULL to search map table */
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return NULL;
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/* NULL terminated array to save passing size */
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chans = kcalloc(nummaps + 1, sizeof(*chans), GFP_KERNEL);
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if (chans == NULL)
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return ERR_PTR(-ENOMEM);
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/* Search for OF matches */
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for (mapind = 0; mapind < nummaps; mapind++) {
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ret = __of_iio_channel_get(&chans[mapind], dev->of_node,
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mapind);
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if (ret)
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goto error_free_chans;
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}
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return chans;
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error_free_chans:
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for (i = 0; i < mapind; i++)
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iio_device_put(chans[i].indio_dev);
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kfree(chans);
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return ERR_PTR(ret);
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}
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#else /* CONFIG_OF */
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static inline struct iio_channel *
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of_iio_channel_get_by_name(struct device_node *np, const char *name)
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{
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return NULL;
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}
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static inline struct iio_channel *of_iio_channel_get_all(struct device *dev)
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{
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return NULL;
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}
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#endif /* CONFIG_OF */
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static struct iio_channel *iio_channel_get_sys(const char *name,
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const char *channel_name)
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{
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struct iio_map_internal *c_i = NULL, *c = NULL;
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struct iio_channel *channel;
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int err;
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if (name == NULL && channel_name == NULL)
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return ERR_PTR(-ENODEV);
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/* first find matching entry the channel map */
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mutex_lock(&iio_map_list_lock);
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list_for_each_entry(c_i, &iio_map_list, l) {
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if ((name && strcmp(name, c_i->map->consumer_dev_name) != 0) ||
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(channel_name &&
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strcmp(channel_name, c_i->map->consumer_channel) != 0))
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continue;
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c = c_i;
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iio_device_get(c->indio_dev);
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break;
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}
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mutex_unlock(&iio_map_list_lock);
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if (c == NULL)
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return ERR_PTR(-ENODEV);
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channel = kzalloc(sizeof(*channel), GFP_KERNEL);
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if (channel == NULL) {
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err = -ENOMEM;
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goto error_no_mem;
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||||
}
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channel->indio_dev = c->indio_dev;
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if (c->map->adc_channel_label) {
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channel->channel =
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iio_chan_spec_from_name(channel->indio_dev,
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c->map->adc_channel_label);
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if (channel->channel == NULL) {
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err = -EINVAL;
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goto error_no_chan;
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||||
}
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||||
}
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||||
|
||||
return channel;
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||||
|
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error_no_chan:
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kfree(channel);
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||||
error_no_mem:
|
||||
iio_device_put(c->indio_dev);
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||||
return ERR_PTR(err);
|
||||
}
|
||||
|
||||
struct iio_channel *iio_channel_get(struct device *dev,
|
||||
const char *channel_name)
|
||||
{
|
||||
const char *name = dev ? dev_name(dev) : NULL;
|
||||
struct iio_channel *channel;
|
||||
|
||||
if (dev) {
|
||||
channel = of_iio_channel_get_by_name(dev->of_node,
|
||||
channel_name);
|
||||
if (channel != NULL)
|
||||
return channel;
|
||||
}
|
||||
|
||||
return iio_channel_get_sys(name, channel_name);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_channel_get);
|
||||
|
||||
void iio_channel_release(struct iio_channel *channel)
|
||||
{
|
||||
iio_device_put(channel->indio_dev);
|
||||
kfree(channel);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_channel_release);
|
||||
|
||||
struct iio_channel *iio_channel_get_all(struct device *dev)
|
||||
{
|
||||
const char *name;
|
||||
struct iio_channel *chans;
|
||||
struct iio_map_internal *c = NULL;
|
||||
int nummaps = 0;
|
||||
int mapind = 0;
|
||||
int i, ret;
|
||||
|
||||
if (dev == NULL)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
chans = of_iio_channel_get_all(dev);
|
||||
if (chans)
|
||||
return chans;
|
||||
|
||||
name = dev_name(dev);
|
||||
|
||||
mutex_lock(&iio_map_list_lock);
|
||||
/* first count the matching maps */
|
||||
list_for_each_entry(c, &iio_map_list, l)
|
||||
if (name && strcmp(name, c->map->consumer_dev_name) != 0)
|
||||
continue;
|
||||
else
|
||||
nummaps++;
|
||||
|
||||
if (nummaps == 0) {
|
||||
ret = -ENODEV;
|
||||
goto error_ret;
|
||||
}
|
||||
|
||||
/* NULL terminated array to save passing size */
|
||||
chans = kzalloc(sizeof(*chans)*(nummaps + 1), GFP_KERNEL);
|
||||
if (chans == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto error_ret;
|
||||
}
|
||||
|
||||
/* for each map fill in the chans element */
|
||||
list_for_each_entry(c, &iio_map_list, l) {
|
||||
if (name && strcmp(name, c->map->consumer_dev_name) != 0)
|
||||
continue;
|
||||
chans[mapind].indio_dev = c->indio_dev;
|
||||
chans[mapind].data = c->map->consumer_data;
|
||||
chans[mapind].channel =
|
||||
iio_chan_spec_from_name(chans[mapind].indio_dev,
|
||||
c->map->adc_channel_label);
|
||||
if (chans[mapind].channel == NULL) {
|
||||
ret = -EINVAL;
|
||||
goto error_free_chans;
|
||||
}
|
||||
iio_device_get(chans[mapind].indio_dev);
|
||||
mapind++;
|
||||
}
|
||||
if (mapind == 0) {
|
||||
ret = -ENODEV;
|
||||
goto error_free_chans;
|
||||
}
|
||||
mutex_unlock(&iio_map_list_lock);
|
||||
|
||||
return chans;
|
||||
|
||||
error_free_chans:
|
||||
for (i = 0; i < nummaps; i++)
|
||||
iio_device_put(chans[i].indio_dev);
|
||||
kfree(chans);
|
||||
error_ret:
|
||||
mutex_unlock(&iio_map_list_lock);
|
||||
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_channel_get_all);
|
||||
|
||||
void iio_channel_release_all(struct iio_channel *channels)
|
||||
{
|
||||
struct iio_channel *chan = &channels[0];
|
||||
|
||||
while (chan->indio_dev) {
|
||||
iio_device_put(chan->indio_dev);
|
||||
chan++;
|
||||
}
|
||||
kfree(channels);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_channel_release_all);
|
||||
|
||||
static int iio_channel_read(struct iio_channel *chan, int *val, int *val2,
|
||||
enum iio_chan_info_enum info)
|
||||
{
|
||||
int unused;
|
||||
int vals[INDIO_MAX_RAW_ELEMENTS];
|
||||
int ret;
|
||||
int val_len = 2;
|
||||
|
||||
if (val2 == NULL)
|
||||
val2 = &unused;
|
||||
|
||||
if (chan->indio_dev->info->read_raw_multi) {
|
||||
ret = chan->indio_dev->info->read_raw_multi(chan->indio_dev,
|
||||
chan->channel, INDIO_MAX_RAW_ELEMENTS,
|
||||
vals, &val_len, info);
|
||||
*val = vals[0];
|
||||
*val2 = vals[1];
|
||||
} else
|
||||
ret = chan->indio_dev->info->read_raw(chan->indio_dev,
|
||||
chan->channel, val, val2, info);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int iio_read_channel_raw(struct iio_channel *chan, int *val)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&chan->indio_dev->info_exist_lock);
|
||||
if (chan->indio_dev->info == NULL) {
|
||||
ret = -ENODEV;
|
||||
goto err_unlock;
|
||||
}
|
||||
|
||||
ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW);
|
||||
err_unlock:
|
||||
mutex_unlock(&chan->indio_dev->info_exist_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_read_channel_raw);
|
||||
|
||||
int iio_read_channel_average_raw(struct iio_channel *chan, int *val)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&chan->indio_dev->info_exist_lock);
|
||||
if (chan->indio_dev->info == NULL) {
|
||||
ret = -ENODEV;
|
||||
goto err_unlock;
|
||||
}
|
||||
|
||||
ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_AVERAGE_RAW);
|
||||
err_unlock:
|
||||
mutex_unlock(&chan->indio_dev->info_exist_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_read_channel_average_raw);
|
||||
|
||||
static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan,
|
||||
int raw, int *processed, unsigned int scale)
|
||||
{
|
||||
int scale_type, scale_val, scale_val2, offset;
|
||||
s64 raw64 = raw;
|
||||
int ret;
|
||||
|
||||
ret = iio_channel_read(chan, &offset, NULL, IIO_CHAN_INFO_OFFSET);
|
||||
if (ret >= 0)
|
||||
raw64 += offset;
|
||||
|
||||
scale_type = iio_channel_read(chan, &scale_val, &scale_val2,
|
||||
IIO_CHAN_INFO_SCALE);
|
||||
if (scale_type < 0)
|
||||
return scale_type;
|
||||
|
||||
switch (scale_type) {
|
||||
case IIO_VAL_INT:
|
||||
*processed = raw64 * scale_val;
|
||||
break;
|
||||
case IIO_VAL_INT_PLUS_MICRO:
|
||||
if (scale_val2 < 0)
|
||||
*processed = -raw64 * scale_val;
|
||||
else
|
||||
*processed = raw64 * scale_val;
|
||||
*processed += div_s64(raw64 * (s64)scale_val2 * scale,
|
||||
1000000LL);
|
||||
break;
|
||||
case IIO_VAL_INT_PLUS_NANO:
|
||||
if (scale_val2 < 0)
|
||||
*processed = -raw64 * scale_val;
|
||||
else
|
||||
*processed = raw64 * scale_val;
|
||||
*processed += div_s64(raw64 * (s64)scale_val2 * scale,
|
||||
1000000000LL);
|
||||
break;
|
||||
case IIO_VAL_FRACTIONAL:
|
||||
*processed = div_s64(raw64 * (s64)scale_val * scale,
|
||||
scale_val2);
|
||||
break;
|
||||
case IIO_VAL_FRACTIONAL_LOG2:
|
||||
*processed = (raw64 * (s64)scale_val * scale) >> scale_val2;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int iio_convert_raw_to_processed(struct iio_channel *chan, int raw,
|
||||
int *processed, unsigned int scale)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&chan->indio_dev->info_exist_lock);
|
||||
if (chan->indio_dev->info == NULL) {
|
||||
ret = -ENODEV;
|
||||
goto err_unlock;
|
||||
}
|
||||
|
||||
ret = iio_convert_raw_to_processed_unlocked(chan, raw, processed,
|
||||
scale);
|
||||
err_unlock:
|
||||
mutex_unlock(&chan->indio_dev->info_exist_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_convert_raw_to_processed);
|
||||
|
||||
int iio_read_channel_processed(struct iio_channel *chan, int *val)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&chan->indio_dev->info_exist_lock);
|
||||
if (chan->indio_dev->info == NULL) {
|
||||
ret = -ENODEV;
|
||||
goto err_unlock;
|
||||
}
|
||||
|
||||
if (iio_channel_has_info(chan->channel, IIO_CHAN_INFO_PROCESSED)) {
|
||||
ret = iio_channel_read(chan, val, NULL,
|
||||
IIO_CHAN_INFO_PROCESSED);
|
||||
} else {
|
||||
ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW);
|
||||
if (ret < 0)
|
||||
goto err_unlock;
|
||||
ret = iio_convert_raw_to_processed_unlocked(chan, *val, val, 1);
|
||||
}
|
||||
|
||||
err_unlock:
|
||||
mutex_unlock(&chan->indio_dev->info_exist_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_read_channel_processed);
|
||||
|
||||
int iio_read_channel_scale(struct iio_channel *chan, int *val, int *val2)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&chan->indio_dev->info_exist_lock);
|
||||
if (chan->indio_dev->info == NULL) {
|
||||
ret = -ENODEV;
|
||||
goto err_unlock;
|
||||
}
|
||||
|
||||
ret = iio_channel_read(chan, val, val2, IIO_CHAN_INFO_SCALE);
|
||||
err_unlock:
|
||||
mutex_unlock(&chan->indio_dev->info_exist_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_read_channel_scale);
|
||||
|
||||
int iio_get_channel_type(struct iio_channel *chan, enum iio_chan_type *type)
|
||||
{
|
||||
int ret = 0;
|
||||
/* Need to verify underlying driver has not gone away */
|
||||
|
||||
mutex_lock(&chan->indio_dev->info_exist_lock);
|
||||
if (chan->indio_dev->info == NULL) {
|
||||
ret = -ENODEV;
|
||||
goto err_unlock;
|
||||
}
|
||||
|
||||
*type = chan->channel->type;
|
||||
err_unlock:
|
||||
mutex_unlock(&chan->indio_dev->info_exist_lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iio_get_channel_type);
|
||||
Loading…
Add table
Add a link
Reference in a new issue