mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-11-02 17:15:37 +01:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
368
arch/powerpc/platforms/pseries/mobility.c
Normal file
368
arch/powerpc/platforms/pseries/mobility.c
Normal file
|
|
@ -0,0 +1,368 @@
|
|||
/*
|
||||
* Support for Partition Mobility/Migration
|
||||
*
|
||||
* Copyright (C) 2010 Nathan Fontenot
|
||||
* Copyright (C) 2010 IBM Corporation
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License version
|
||||
* 2 as published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/kobject.h>
|
||||
#include <linux/smp.h>
|
||||
#include <linux/stat.h>
|
||||
#include <linux/completion.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include <asm/machdep.h>
|
||||
#include <asm/rtas.h>
|
||||
#include "pseries.h"
|
||||
|
||||
static struct kobject *mobility_kobj;
|
||||
|
||||
struct update_props_workarea {
|
||||
__be32 phandle;
|
||||
__be32 state;
|
||||
__be64 reserved;
|
||||
__be32 nprops;
|
||||
} __packed;
|
||||
|
||||
#define NODE_ACTION_MASK 0xff000000
|
||||
#define NODE_COUNT_MASK 0x00ffffff
|
||||
|
||||
#define DELETE_DT_NODE 0x01000000
|
||||
#define UPDATE_DT_NODE 0x02000000
|
||||
#define ADD_DT_NODE 0x03000000
|
||||
|
||||
#define MIGRATION_SCOPE (1)
|
||||
|
||||
static int mobility_rtas_call(int token, char *buf, s32 scope)
|
||||
{
|
||||
int rc;
|
||||
|
||||
spin_lock(&rtas_data_buf_lock);
|
||||
|
||||
memcpy(rtas_data_buf, buf, RTAS_DATA_BUF_SIZE);
|
||||
rc = rtas_call(token, 2, 1, NULL, rtas_data_buf, scope);
|
||||
memcpy(buf, rtas_data_buf, RTAS_DATA_BUF_SIZE);
|
||||
|
||||
spin_unlock(&rtas_data_buf_lock);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int delete_dt_node(__be32 phandle)
|
||||
{
|
||||
struct device_node *dn;
|
||||
|
||||
dn = of_find_node_by_phandle(be32_to_cpu(phandle));
|
||||
if (!dn)
|
||||
return -ENOENT;
|
||||
|
||||
dlpar_detach_node(dn);
|
||||
of_node_put(dn);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int update_dt_property(struct device_node *dn, struct property **prop,
|
||||
const char *name, u32 vd, char *value)
|
||||
{
|
||||
struct property *new_prop = *prop;
|
||||
int more = 0;
|
||||
|
||||
/* A negative 'vd' value indicates that only part of the new property
|
||||
* value is contained in the buffer and we need to call
|
||||
* ibm,update-properties again to get the rest of the value.
|
||||
*
|
||||
* A negative value is also the two's compliment of the actual value.
|
||||
*/
|
||||
if (vd & 0x80000000) {
|
||||
vd = ~vd + 1;
|
||||
more = 1;
|
||||
}
|
||||
|
||||
if (new_prop) {
|
||||
/* partial property fixup */
|
||||
char *new_data = kzalloc(new_prop->length + vd, GFP_KERNEL);
|
||||
if (!new_data)
|
||||
return -ENOMEM;
|
||||
|
||||
memcpy(new_data, new_prop->value, new_prop->length);
|
||||
memcpy(new_data + new_prop->length, value, vd);
|
||||
|
||||
kfree(new_prop->value);
|
||||
new_prop->value = new_data;
|
||||
new_prop->length += vd;
|
||||
} else {
|
||||
new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
|
||||
if (!new_prop)
|
||||
return -ENOMEM;
|
||||
|
||||
new_prop->name = kstrdup(name, GFP_KERNEL);
|
||||
if (!new_prop->name) {
|
||||
kfree(new_prop);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
new_prop->length = vd;
|
||||
new_prop->value = kzalloc(new_prop->length, GFP_KERNEL);
|
||||
if (!new_prop->value) {
|
||||
kfree(new_prop->name);
|
||||
kfree(new_prop);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
memcpy(new_prop->value, value, vd);
|
||||
*prop = new_prop;
|
||||
}
|
||||
|
||||
if (!more) {
|
||||
of_update_property(dn, new_prop);
|
||||
*prop = NULL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int update_dt_node(__be32 phandle, s32 scope)
|
||||
{
|
||||
struct update_props_workarea *upwa;
|
||||
struct device_node *dn;
|
||||
struct property *prop = NULL;
|
||||
int i, rc, rtas_rc;
|
||||
char *prop_data;
|
||||
char *rtas_buf;
|
||||
int update_properties_token;
|
||||
u32 nprops;
|
||||
u32 vd;
|
||||
|
||||
update_properties_token = rtas_token("ibm,update-properties");
|
||||
if (update_properties_token == RTAS_UNKNOWN_SERVICE)
|
||||
return -EINVAL;
|
||||
|
||||
rtas_buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
|
||||
if (!rtas_buf)
|
||||
return -ENOMEM;
|
||||
|
||||
dn = of_find_node_by_phandle(be32_to_cpu(phandle));
|
||||
if (!dn) {
|
||||
kfree(rtas_buf);
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
upwa = (struct update_props_workarea *)&rtas_buf[0];
|
||||
upwa->phandle = phandle;
|
||||
|
||||
do {
|
||||
rtas_rc = mobility_rtas_call(update_properties_token, rtas_buf,
|
||||
scope);
|
||||
if (rtas_rc < 0)
|
||||
break;
|
||||
|
||||
prop_data = rtas_buf + sizeof(*upwa);
|
||||
nprops = be32_to_cpu(upwa->nprops);
|
||||
|
||||
/* On the first call to ibm,update-properties for a node the
|
||||
* the first property value descriptor contains an empty
|
||||
* property name, the property value length encoded as u32,
|
||||
* and the property value is the node path being updated.
|
||||
*/
|
||||
if (*prop_data == 0) {
|
||||
prop_data++;
|
||||
vd = be32_to_cpu(*(__be32 *)prop_data);
|
||||
prop_data += vd + sizeof(vd);
|
||||
nprops--;
|
||||
}
|
||||
|
||||
for (i = 0; i < nprops; i++) {
|
||||
char *prop_name;
|
||||
|
||||
prop_name = prop_data;
|
||||
prop_data += strlen(prop_name) + 1;
|
||||
vd = be32_to_cpu(*(__be32 *)prop_data);
|
||||
prop_data += sizeof(vd);
|
||||
|
||||
switch (vd) {
|
||||
case 0x00000000:
|
||||
/* name only property, nothing to do */
|
||||
break;
|
||||
|
||||
case 0x80000000:
|
||||
prop = of_find_property(dn, prop_name, NULL);
|
||||
of_remove_property(dn, prop);
|
||||
prop = NULL;
|
||||
break;
|
||||
|
||||
default:
|
||||
rc = update_dt_property(dn, &prop, prop_name,
|
||||
vd, prop_data);
|
||||
if (rc) {
|
||||
printk(KERN_ERR "Could not update %s"
|
||||
" property\n", prop_name);
|
||||
}
|
||||
|
||||
prop_data += vd;
|
||||
}
|
||||
}
|
||||
} while (rtas_rc == 1);
|
||||
|
||||
of_node_put(dn);
|
||||
kfree(rtas_buf);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int add_dt_node(__be32 parent_phandle, __be32 drc_index)
|
||||
{
|
||||
struct device_node *dn;
|
||||
struct device_node *parent_dn;
|
||||
int rc;
|
||||
|
||||
parent_dn = of_find_node_by_phandle(be32_to_cpu(parent_phandle));
|
||||
if (!parent_dn)
|
||||
return -ENOENT;
|
||||
|
||||
dn = dlpar_configure_connector(drc_index, parent_dn);
|
||||
if (!dn)
|
||||
return -ENOENT;
|
||||
|
||||
rc = dlpar_attach_node(dn);
|
||||
if (rc)
|
||||
dlpar_free_cc_nodes(dn);
|
||||
|
||||
of_node_put(parent_dn);
|
||||
return rc;
|
||||
}
|
||||
|
||||
int pseries_devicetree_update(s32 scope)
|
||||
{
|
||||
char *rtas_buf;
|
||||
__be32 *data;
|
||||
int update_nodes_token;
|
||||
int rc;
|
||||
|
||||
update_nodes_token = rtas_token("ibm,update-nodes");
|
||||
if (update_nodes_token == RTAS_UNKNOWN_SERVICE)
|
||||
return -EINVAL;
|
||||
|
||||
rtas_buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
|
||||
if (!rtas_buf)
|
||||
return -ENOMEM;
|
||||
|
||||
do {
|
||||
rc = mobility_rtas_call(update_nodes_token, rtas_buf, scope);
|
||||
if (rc && rc != 1)
|
||||
break;
|
||||
|
||||
data = (__be32 *)rtas_buf + 4;
|
||||
while (be32_to_cpu(*data) & NODE_ACTION_MASK) {
|
||||
int i;
|
||||
u32 action = be32_to_cpu(*data) & NODE_ACTION_MASK;
|
||||
u32 node_count = be32_to_cpu(*data) & NODE_COUNT_MASK;
|
||||
|
||||
data++;
|
||||
|
||||
for (i = 0; i < node_count; i++) {
|
||||
__be32 phandle = *data++;
|
||||
__be32 drc_index;
|
||||
|
||||
switch (action) {
|
||||
case DELETE_DT_NODE:
|
||||
delete_dt_node(phandle);
|
||||
break;
|
||||
case UPDATE_DT_NODE:
|
||||
update_dt_node(phandle, scope);
|
||||
break;
|
||||
case ADD_DT_NODE:
|
||||
drc_index = *data++;
|
||||
add_dt_node(phandle, drc_index);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
} while (rc == 1);
|
||||
|
||||
kfree(rtas_buf);
|
||||
return rc;
|
||||
}
|
||||
|
||||
void post_mobility_fixup(void)
|
||||
{
|
||||
int rc;
|
||||
int activate_fw_token;
|
||||
|
||||
activate_fw_token = rtas_token("ibm,activate-firmware");
|
||||
if (activate_fw_token == RTAS_UNKNOWN_SERVICE) {
|
||||
printk(KERN_ERR "Could not make post-mobility "
|
||||
"activate-fw call.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
do {
|
||||
rc = rtas_call(activate_fw_token, 0, 1, NULL);
|
||||
} while (rtas_busy_delay(rc));
|
||||
|
||||
if (rc)
|
||||
printk(KERN_ERR "Post-mobility activate-fw failed: %d\n", rc);
|
||||
|
||||
rc = pseries_devicetree_update(MIGRATION_SCOPE);
|
||||
if (rc)
|
||||
printk(KERN_ERR "Post-mobility device tree update "
|
||||
"failed: %d\n", rc);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static ssize_t migrate_store(struct class *class, struct class_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct rtas_args args;
|
||||
u64 streamid;
|
||||
int rc;
|
||||
|
||||
rc = kstrtou64(buf, 0, &streamid);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
memset(&args, 0, sizeof(args));
|
||||
args.token = rtas_token("ibm,suspend-me");
|
||||
args.nargs = 2;
|
||||
args.nret = 1;
|
||||
|
||||
args.args[0] = streamid >> 32 ;
|
||||
args.args[1] = streamid & 0xffffffff;
|
||||
args.rets = &args.args[args.nargs];
|
||||
|
||||
do {
|
||||
args.rets[0] = 0;
|
||||
rc = rtas_ibm_suspend_me(&args);
|
||||
if (!rc && args.rets[0] == RTAS_NOT_SUSPENDABLE)
|
||||
ssleep(1);
|
||||
} while (!rc && args.rets[0] == RTAS_NOT_SUSPENDABLE);
|
||||
|
||||
if (rc)
|
||||
return rc;
|
||||
else if (args.rets[0])
|
||||
return args.rets[0];
|
||||
|
||||
post_mobility_fixup();
|
||||
return count;
|
||||
}
|
||||
|
||||
static CLASS_ATTR(migration, S_IWUSR, NULL, migrate_store);
|
||||
|
||||
static int __init mobility_sysfs_init(void)
|
||||
{
|
||||
int rc;
|
||||
|
||||
mobility_kobj = kobject_create_and_add("mobility", kernel_kobj);
|
||||
if (!mobility_kobj)
|
||||
return -ENOMEM;
|
||||
|
||||
rc = sysfs_create_file(mobility_kobj, &class_attr_migration.attr);
|
||||
|
||||
return rc;
|
||||
}
|
||||
machine_device_initcall(pseries, mobility_sysfs_init);
|
||||
Loading…
Add table
Add a link
Reference in a new issue