antifallobst
/
lineage_kernel_xcoverpro
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
lineage_kernel_xcoverpro/drivers/usb/gadget/configfs.c

2343 lines
58 KiB
C
Executable File
Raw Blame History

#include <linux/configfs.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/nls.h>
#include <linux/usb/composite.h>
#include <linux/usb/gadget_configfs.h>
#include "configfs.h"
#include "u_f.h"
#include "u_os_desc.h"
#include <linux/soc/samsung/exynos-soc.h>
#ifdef CONFIG_USB_CONFIGFS_UEVENT
#include <linux/platform_device.h>
#include <linux/kdev_t.h>
#include <linux/usb/ch9.h>
#ifdef CONFIG_USB_CONFIGFS_F_ACC
extern int acc_ctrlrequest(struct usb_composite_dev *cdev,
const struct usb_ctrlrequest *ctrl);
void acc_disconnect(void);
#endif
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
#include "function/u_ether.h"
extern int terminal_ctrl_request(struct usb_composite_dev *cdev,
const struct usb_ctrlrequest *ctrl);
#endif
static struct class *android_class;
static struct device *android_device;
static int index;
struct device *create_function_device(char *name)
{
if (android_device && !IS_ERR(android_device)) {
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
if (!strcmp(name, "terminal_version"))
return android_device;
else
#endif
{
return device_create(android_class, android_device,
MKDEV(0, index++), NULL, name);
}
} else {
return ERR_PTR(-EINVAL);
}
}
EXPORT_SYMBOL_GPL(create_function_device);
#endif
#ifdef CONFIG_USB_TYPEC_MANAGER_NOTIFIER
void set_usb_enumeration_state(int state);
void set_usb_enable_state(void);
extern int dwc3_gadget_get_cmply_link_state(struct usb_gadget *g);
#endif
#define CHIPID_SIZE (16)
int check_user_usb_string(const char *name,
struct usb_gadget_strings *stringtab_dev)
{
unsigned primary_lang;
unsigned sub_lang;
u16 num;
int ret;
ret = kstrtou16(name, 0, &num);
if (ret)
return ret;
primary_lang = num & 0x3ff;
sub_lang = num >> 10;
/* simple sanity check for valid langid */
switch (primary_lang) {
case 0:
case 0x62 ... 0xfe:
case 0x100 ... 0x3ff:
return -EINVAL;
}
if (!sub_lang)
return -EINVAL;
stringtab_dev->language = num;
return 0;
}
#define MAX_NAME_LEN 40
#define MAX_USB_STRING_LANGS 2
#define MAX_USB_STRING_LEN 126
#define MAX_USB_STRING_WITH_NULL_LEN (MAX_USB_STRING_LEN+1)
static const struct usb_descriptor_header *otg_desc[2];
struct gadget_info {
struct config_group group;
struct config_group functions_group;
struct config_group configs_group;
struct config_group strings_group;
struct config_group os_desc_group;
struct mutex lock;
struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1];
struct list_head string_list;
struct list_head available_func;
struct usb_composite_driver composite;
struct usb_composite_dev cdev;
bool use_os_desc;
char b_vendor_code;
char qw_sign[OS_STRING_QW_SIGN_LEN];
#ifdef CONFIG_USB_CONFIGFS_UEVENT
bool enabled;
bool connected;
bool sw_connected;
struct work_struct work;
struct device *dev;
struct list_head linked_func;
bool symboliclink_change_mode;
#endif
};
static inline struct gadget_info *to_gadget_info(struct config_item *item)
{
return container_of(to_config_group(item), struct gadget_info, group);
}
struct config_usb_cfg {
struct config_group group;
struct config_group strings_group;
struct list_head string_list;
struct usb_configuration c;
struct list_head func_list;
struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1];
};
static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item)
{
return container_of(to_config_group(item), struct config_usb_cfg,
group);
}
struct gadget_strings {
struct usb_gadget_strings stringtab_dev;
struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX];
char *manufacturer;
char *product;
char *serialnumber;
struct config_group group;
struct list_head list;
};
struct os_desc {
struct config_group group;
};
struct gadget_config_name {
struct usb_gadget_strings stringtab_dev;
struct usb_string strings;
char *configuration;
struct config_group group;
struct list_head list;
};
#ifdef CONFIG_USB_TYPEC_MANAGER_NOTIFIER
int dwc3_gadget_get_cmply_link_state_wrapper(void)
{
struct gadget_info *dev;
struct usb_composite_dev *cdev;
struct usb_gadget *gadget;
int ret = -ENODEV;
if (android_device && !IS_ERR(android_device)) {
dev = dev_get_drvdata(android_device);
cdev = &dev->cdev;
if (cdev) {
gadget = cdev->gadget;
if (gadget)
ret = dwc3_gadget_get_cmply_link_state(gadget);
else
pr_err("usb: %s:gadget pointer is null\n", __func__);
}
}
return ret;
}
EXPORT_SYMBOL(dwc3_gadget_get_cmply_link_state_wrapper);
#endif
static int usb_string_copy(const char *s, char **s_copy)
{
int ret;
char *str;
char *copy = *s_copy;
ret = strlen(s);
if (ret > MAX_USB_STRING_LEN)
return -EOVERFLOW;
if (copy) {
str = copy;
} else {
str = kmalloc(MAX_USB_STRING_WITH_NULL_LEN, GFP_KERNEL);
if (!str)
return -ENOMEM;
}
strncpy(str, s, MAX_USB_STRING_WITH_NULL_LEN);
if (str[ret - 1] == '\n')
str[ret - 1] = '\0';
*s_copy = str;
return 0;
}
#ifndef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
static int set_alt_serialnumber(struct gadget_strings *gs)
{
char *str;
int ret = -ENOMEM;
str = kmalloc(CHIPID_SIZE + 1, GFP_KERNEL);
if (!str) {
pr_err("%s: failed to alloc for string\n", __func__);
return ret;
}
snprintf(str, CHIPID_SIZE + 1, "%016lx", (long)exynos_soc_info.unique_id);
if (usb_string_copy(str, &gs->serialnumber))
pr_err("%s: failed to copy alternative string\n", __func__);
else
ret = 0;
kfree(str);
return ret;
}
#endif
#define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \
static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \
char *page) \
{ \
return sprintf(page, "0x%02x\n", \
to_gadget_info(item)->cdev.desc.__name); \
}
#define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \
static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \
char *page) \
{ \
return sprintf(page, "0x%04x\n", \
le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \
}
#define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \
static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \
const char *page, size_t len) \
{ \
u8 val; \
int ret; \
ret = kstrtou8(page, 0, &val); \
if (ret) \
return ret; \
to_gadget_info(item)->cdev.desc._name = val; \
return len; \
}
#define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \
static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \
const char *page, size_t len) \
{ \
u16 val; \
int ret; \
ret = kstrtou16(page, 0, &val); \
if (ret) \
return ret; \
to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val); \
return len; \
}
#define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \
GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \
GI_DEVICE_DESC_SIMPLE_W_##_type(_name)
GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB);
GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8);
GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8);
GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8);
GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8);
GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16);
GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16);
GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice);
static ssize_t is_valid_bcd(u16 bcd_val)
{
if ((bcd_val & 0xf) > 9)
return -EINVAL;
if (((bcd_val >> 4) & 0xf) > 9)
return -EINVAL;
if (((bcd_val >> 8) & 0xf) > 9)
return -EINVAL;
if (((bcd_val >> 12) & 0xf) > 9)
return -EINVAL;
return 0;
}
static ssize_t gadget_dev_desc_bcdDevice_store(struct config_item *item,
const char *page, size_t len)
{
u16 bcdDevice;
int ret;
ret = kstrtou16(page, 0, &bcdDevice);
if (ret)
return ret;
ret = is_valid_bcd(bcdDevice);
if (ret)
return ret;
to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice);
return len;
}
static ssize_t gadget_dev_desc_bcdUSB_store(struct config_item *item,
const char *page, size_t len)
{
u16 bcdUSB;
int ret;
ret = kstrtou16(page, 0, &bcdUSB);
if (ret)
return ret;
ret = is_valid_bcd(bcdUSB);
if (ret)
return ret;
to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB);
return len;
}
static ssize_t gadget_dev_desc_UDC_show(struct config_item *item, char *page)
{
char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name;
return sprintf(page, "%s\n", udc_name ?: "");
}
static int unregister_gadget(struct gadget_info *gi)
{
int ret;
if (!gi->composite.gadget_driver.udc_name)
return -ENODEV;
ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver);
if (ret)
return ret;
kfree(gi->composite.gadget_driver.udc_name);
gi->composite.gadget_driver.udc_name = NULL;
return 0;
}
static void clear_current_usb_link(struct usb_composite_dev *cdev)
{
struct usb_configuration *c;
struct config_usb_cfg *cfg;
struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
struct usb_function *f, *tmp;
pr_info("usb: %s: GSI_image : Clear cfg->func_list\n", __func__);
if (cdev != NULL) {
list_for_each_entry(c, &cdev->configs, list) {
cfg = container_of(c, struct config_usb_cfg, c);
list_for_each_entry_safe(f, tmp, &cfg->func_list, list) {
pr_info("usb: %s : f->name = %s\n", __func__, f->name);
list_move_tail(&f->list, &gi->linked_func);
}
c->next_interface_id = 0;
memset(c->interface, 0, sizeof(c->interface));
}
}
}
static ssize_t gadget_dev_desc_UDC_store(struct config_item *item,
const char *page, size_t len)
{
struct gadget_info *gi = to_gadget_info(item);
char *name;
int ret;
#ifdef CONFIG_USB_CONFIGFS_UEVENT
struct usb_composite_dev *cdev;
#endif
pr_info("%s: +++\n", __func__);
mdelay(50);
name = kstrdup(page, GFP_KERNEL);
if (!name)
return -ENOMEM;
if(!len || (strlen(name) != len)) {
kfree(name);
return -EINVAL;
}
if (name[len - 1] == '\n')
name[len - 1] = '\0';
#ifdef CONFIG_USB_CONFIGFS_UEVENT
cdev = &gi->cdev;
if (!cdev) {
printk("usb: %s : cdev is null, name = %s \n",__func__, name);
return -ENODEV;
}
#endif
mutex_lock(&gi->lock);
if (!strlen(name) || strcmp(name, "none") == 0) {
ret = unregister_gadget(gi);
if (ret)
goto err;
kfree(name);
#ifdef CONFIG_USB_CONFIGFS_UEVENT
if (!list_empty(&gi->linked_func) && gi->symboliclink_change_mode) {
pr_info("usb: %s: GSI_image : Clear cfg->func_list\n", __func__);
clear_current_usb_link(cdev);
}
#endif
} else {
if (gi->composite.gadget_driver.udc_name) {
ret = -EBUSY;
goto err;
}
gi->composite.gadget_driver.udc_name = name;
ret = usb_gadget_probe_driver(&gi->composite.gadget_driver);
if (ret) {
gi->composite.gadget_driver.udc_name = NULL;
goto err;
}
#ifdef CONFIG_USB_CONFIGFS_UEVENT
if (gi->symboliclink_change_mode) {
pr_info("usb: %s : gi->symboliclink_change_mode = %d\n", __func__,
gi->symboliclink_change_mode);
usb_gadget_connect(gi->cdev.gadget);
}
#endif
}
mutex_unlock(&gi->lock);
return len;
err:
pr_info("%s: err return ---\n", __func__);
kfree(name);
mutex_unlock(&gi->lock);
return ret;
}
CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass);
CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass);
CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol);
CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0);
CONFIGFS_ATTR(gadget_dev_desc_, idVendor);
CONFIGFS_ATTR(gadget_dev_desc_, idProduct);
CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice);
CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB);
CONFIGFS_ATTR(gadget_dev_desc_, UDC);
static struct configfs_attribute *gadget_root_attrs[] = {
&gadget_dev_desc_attr_bDeviceClass,
&gadget_dev_desc_attr_bDeviceSubClass,
&gadget_dev_desc_attr_bDeviceProtocol,
&gadget_dev_desc_attr_bMaxPacketSize0,
&gadget_dev_desc_attr_idVendor,
&gadget_dev_desc_attr_idProduct,
&gadget_dev_desc_attr_bcdDevice,
&gadget_dev_desc_attr_bcdUSB,
&gadget_dev_desc_attr_UDC,
NULL,
};
static inline struct gadget_strings *to_gadget_strings(struct config_item *item)
{
return container_of(to_config_group(item), struct gadget_strings,
group);
}
static inline struct gadget_config_name *to_gadget_config_name(
struct config_item *item)
{
return container_of(to_config_group(item), struct gadget_config_name,
group);
}
static inline struct usb_function_instance *to_usb_function_instance(
struct config_item *item)
{
return container_of(to_config_group(item),
struct usb_function_instance, group);
}
static void gadget_info_attr_release(struct config_item *item)
{
struct gadget_info *gi = to_gadget_info(item);
WARN_ON(!list_empty(&gi->cdev.configs));
WARN_ON(!list_empty(&gi->string_list));
WARN_ON(!list_empty(&gi->available_func));
kfree(gi->composite.gadget_driver.function);
kfree(gi);
}
static struct configfs_item_operations gadget_root_item_ops = {
.release = gadget_info_attr_release,
};
static void gadget_config_attr_release(struct config_item *item)
{
struct config_usb_cfg *cfg = to_config_usb_cfg(item);
WARN_ON(!list_empty(&cfg->c.functions));
list_del(&cfg->c.list);
kfree(cfg->c.label);
kfree(cfg);
}
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
static void set_unique_rndis_mac_address(
struct gadget_info *gi,
struct usb_function_instance *fi)
{
static u8 ethaddr[ETH_ALEN] = {0,};
int i;
char *src = NULL;
struct gadget_strings *gs;
list_for_each_entry(gs, &gi->string_list, list) {
src = gs->serialnumber;
}
if (src) {
for (i = 0; i < ETH_ALEN; i++)
ethaddr[i] = 0;
/*
* create a fake MAC address from our serial number.
* first byte is 0x02 to signify locally administered.
*/
ethaddr[0] = 0x02;
for (i = 0; (i < 256) && *src; i++) {
/* XOR the USB serial across the remaining bytes */
ethaddr[i % (ETH_ALEN - 1) + 1] ^= *src++;
}
fi->set_inst_eth_addr(fi, ethaddr);
}
}
#endif
#ifdef CONFIG_USB_CONFIGFS_UEVENT
static int check_symboliclink_change_mode (struct config_usb_cfg *cfg)
{
struct gadget_config_name *cn;
if (!list_empty(&cfg->string_list)) {
list_for_each_entry(cn, &cfg->string_list, list) {
if (strcmp(cn->configuration, "Conf 1") != 0) {
if (strcmp(cn->configuration, "adb") == 0
|| strcmp(cn->configuration, "fastboot") == 0)
return USB_MODE_FOR_VTS_ADB;
else
return USB_MODE_FOR_VTS_MTP;
}
}
}
return USB_MODE_FOR_SEC;
}
static struct usb_function *get_adb_function_from_linked_func(struct gadget_info *gi)
{
struct usb_function *f, *tmp;
list_for_each_entry_safe(f, tmp, &gi->linked_func, list) {
pr_info("usb: %s : f_name = %s\n", __func__, f->name);
if (strcmp(f->name, "adb") == 0)
return f;
}
return NULL;
}
static int make_adb_connection_for_gsi(
struct config_usb_cfg *cfg,
struct usb_function_instance *fi)
{
struct usb_composite_dev *cdev = cfg->c.cdev;
struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
struct usb_function *f;
int ret = 0;
if (!list_empty(&gi->linked_func) || !list_empty(&cfg->func_list))
clear_current_usb_link(cdev);
pr_info("usb: %s: ADB Only mode for recovery or VTS test\n", __func__);
f = usb_get_function(fi);
if (IS_ERR(f)) {
ret = PTR_ERR(f);
} else {
f = get_adb_function_from_linked_func(gi);
if (f)
list_move_tail(&f->list, &cfg->func_list);
else
ret = -EEXIST;
}
return ret;
}
#endif
static int config_usb_cfg_link(
struct config_item *usb_cfg_ci,
struct config_item *usb_func_ci)
{
struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci);
struct usb_composite_dev *cdev = cfg->c.cdev;
struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
struct config_group *group = to_config_group(usb_func_ci);
struct usb_function_instance *fi = container_of(group,
struct usb_function_instance, group);
struct usb_function_instance *a_fi;
struct usb_function *f;
#ifdef CONFIG_USB_CONFIGFS_UEVENT
int is_vts_mtp = 0;
#endif
int ret;
mutex_lock(&gi->lock);
/*
* Make sure this function is from within our _this_ gadget and not
* from another gadget or a random directory.
* Also a function instance can only be linked once.
*/
list_for_each_entry(a_fi, &gi->available_func, cfs_list) {
if (a_fi == fi)
break;
}
if (a_fi != fi) {
ret = -EINVAL;
goto out;
}
list_for_each_entry(f, &cfg->func_list, list) {
if (f->fi == fi) {
#ifdef CONFIG_USB_CONFIGFS_UEVENT
pr_info("usb: %s : usb function instance already exist (GSI)~\n", __func__);
gi->symboliclink_change_mode = 1;
if (list_empty(&gi->linked_func)) {
pr_info("usb: %s : usb function instance already exist (GSI)add cfg\n",
__func__);
f = usb_get_function(fi);
if (IS_ERR(f))
ret = PTR_ERR(f);
else {
list_add_tail(&f->list, &cfg->func_list);
ret = 0;
}
goto out;
} else {
is_vts_mtp = check_symboliclink_change_mode(cfg);
if (is_vts_mtp == USB_MODE_FOR_VTS_MTP)
goto out;
ret = make_adb_connection_for_gsi(cfg, fi);
cfg->c.next_interface_id = 0;
goto out;
}
#endif
ret = -EEXIST;
goto out;
}
}
/* usb tethering */
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
if (fi->set_inst_eth_addr) {
set_unique_rndis_mac_address(gi, fi);
}
#endif
#ifdef CONFIG_USB_CONFIGFS_UEVENT
/* Go through all configs, attach all functions */
is_vts_mtp = check_symboliclink_change_mode(cfg);
if (is_vts_mtp) {
gi->symboliclink_change_mode = 1;
if (is_vts_mtp == USB_MODE_FOR_VTS_MTP)
goto out;
if (list_empty(&gi->linked_func)) {
pr_info("usb: %s : add cfg func_list~\n", __func__);
f = usb_get_function(fi);
if (IS_ERR(f))
ret = PTR_ERR(f);
else {
list_add_tail(&f->list, &cfg->func_list);
ret = 0;
}
goto out;
} else {
ret = make_adb_connection_for_gsi(cfg, fi);
if (ret)
pr_err("usb: %s adb function setting fails %d\n", __func__, ret);
cfg->c.next_interface_id = 0;
goto out;
}
} else
gi->symboliclink_change_mode = 0;
#endif
f = usb_get_function(fi);
if (IS_ERR(f)) {
ret = PTR_ERR(f);
goto out;
}
#ifdef CONFIG_USB_CONFIGFS_UEVENT
list_add_tail(&f->list, &gi->linked_func);
#else
/* stash the function until we bind it to the gadget */
list_add_tail(&f->list, &cfg->func_list);
#endif
ret = 0;
out:
mutex_unlock(&gi->lock);
return ret;
}
static void config_usb_cfg_unlink(
struct config_item *usb_cfg_ci,
struct config_item *usb_func_ci)
{
struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci);
struct usb_composite_dev *cdev = cfg->c.cdev;
struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
struct config_group *group = to_config_group(usb_func_ci);
struct usb_function_instance *fi = container_of(group,
struct usb_function_instance, group);
struct usb_function *f;
/*
* ideally I would like to forbid to unlink functions while a gadget is
* bound to an UDC. Since this isn't possible at the moment, we simply
* force an unbind, the function is available here and then we can
* remove the function.
*/
mutex_lock(&gi->lock);
if (gi->composite.gadget_driver.udc_name)
unregister_gadget(gi);
WARN_ON(gi->composite.gadget_driver.udc_name);
list_for_each_entry(f, &cfg->func_list, list) {
if (f->fi == fi) {
list_del(&f->list);
usb_put_function(f);
mutex_unlock(&gi->lock);
return;
}
}
mutex_unlock(&gi->lock);
WARN(1, "Unable to locate function to unbind\n");
}
static struct configfs_item_operations gadget_config_item_ops = {
.release = gadget_config_attr_release,
.allow_link = config_usb_cfg_link,
.drop_link = config_usb_cfg_unlink,
};
static ssize_t gadget_config_desc_MaxPower_show(struct config_item *item,
char *page)
{
return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower);
}
static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item,
const char *page, size_t len)
{
u16 val;
int ret;
ret = kstrtou16(page, 0, &val);
if (ret)
return ret;
if (DIV_ROUND_UP(val, 8) > 0xff)
return -ERANGE;
to_config_usb_cfg(item)->c.MaxPower = val;
return len;
}
static ssize_t gadget_config_desc_bmAttributes_show(struct config_item *item,
char *page)
{
return sprintf(page, "0x%02x\n",
to_config_usb_cfg(item)->c.bmAttributes);
}
static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item,
const char *page, size_t len)
{
u8 val;
int ret;
ret = kstrtou8(page, 0, &val);
if (ret)
return ret;
if (!(val & USB_CONFIG_ATT_ONE))
return -EINVAL;
if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER |
USB_CONFIG_ATT_WAKEUP))
return -EINVAL;
to_config_usb_cfg(item)->c.bmAttributes = val;
return len;
}
CONFIGFS_ATTR(gadget_config_desc_, MaxPower);
CONFIGFS_ATTR(gadget_config_desc_, bmAttributes);
static struct configfs_attribute *gadget_config_attrs[] = {
&gadget_config_desc_attr_MaxPower,
&gadget_config_desc_attr_bmAttributes,
NULL,
};
static struct config_item_type gadget_config_type = {
.ct_item_ops = &gadget_config_item_ops,
.ct_attrs = gadget_config_attrs,
.ct_owner = THIS_MODULE,
};
static struct config_item_type gadget_root_type = {
.ct_item_ops = &gadget_root_item_ops,
.ct_attrs = gadget_root_attrs,
.ct_owner = THIS_MODULE,
};
static void composite_init_dev(struct usb_composite_dev *cdev)
{
spin_lock_init(&cdev->lock);
INIT_LIST_HEAD(&cdev->configs);
INIT_LIST_HEAD(&cdev->gstrings);
}
static struct config_group *function_make(
struct config_group *group,
const char *name)
{
struct gadget_info *gi;
struct usb_function_instance *fi;
char buf[MAX_NAME_LEN];
char *func_name;
char *instance_name;
int ret;
ret = snprintf(buf, MAX_NAME_LEN, "%s", name);
if (ret >= MAX_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
func_name = buf;
instance_name = strchr(func_name, '.');
if (!instance_name) {
pr_err("Unable to locate . in FUNC.INSTANCE\n");
return ERR_PTR(-EINVAL);
}
*instance_name = '\0';
instance_name++;
fi = usb_get_function_instance(func_name);
if (IS_ERR(fi))
return ERR_CAST(fi);
ret = config_item_set_name(&fi->group.cg_item, "%s", name);
if (ret) {
usb_put_function_instance(fi);
return ERR_PTR(ret);
}
if (fi->set_inst_name) {
ret = fi->set_inst_name(fi, instance_name);
if (ret) {
usb_put_function_instance(fi);
return ERR_PTR(ret);
}
}
gi = container_of(group, struct gadget_info, functions_group);
mutex_lock(&gi->lock);
list_add_tail(&fi->cfs_list, &gi->available_func);
mutex_unlock(&gi->lock);
return &fi->group;
}
static void function_drop(
struct config_group *group,
struct config_item *item)
{
struct usb_function_instance *fi = to_usb_function_instance(item);
struct gadget_info *gi;
gi = container_of(group, struct gadget_info, functions_group);
mutex_lock(&gi->lock);
list_del(&fi->cfs_list);
mutex_unlock(&gi->lock);
config_item_put(item);
}
static struct configfs_group_operations functions_ops = {
.make_group = &function_make,
.drop_item = &function_drop,
};
static struct config_item_type functions_type = {
.ct_group_ops = &functions_ops,
.ct_owner = THIS_MODULE,
};
GS_STRINGS_RW(gadget_config_name, configuration);
static struct configfs_attribute *gadget_config_name_langid_attrs[] = {
&gadget_config_name_attr_configuration,
NULL,
};
static void gadget_config_name_attr_release(struct config_item *item)
{
struct gadget_config_name *cn = to_gadget_config_name(item);
kfree(cn->configuration);
list_del(&cn->list);
kfree(cn);
}
USB_CONFIG_STRING_RW_OPS(gadget_config_name);
USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg);
static struct config_group *config_desc_make(
struct config_group *group,
const char *name)
{
struct gadget_info *gi;
struct config_usb_cfg *cfg;
char buf[MAX_NAME_LEN];
char *num_str;
u8 num;
int ret;
gi = container_of(group, struct gadget_info, configs_group);
ret = snprintf(buf, MAX_NAME_LEN, "%s", name);
if (ret >= MAX_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
num_str = strchr(buf, '.');
if (!num_str) {
pr_err("Unable to locate . in name.bConfigurationValue\n");
return ERR_PTR(-EINVAL);
}
*num_str = '\0';
num_str++;
if (!strlen(buf))
return ERR_PTR(-EINVAL);
ret = kstrtou8(num_str, 0, &num);
if (ret)
return ERR_PTR(ret);
cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
if (!cfg)
return ERR_PTR(-ENOMEM);
cfg->c.label = kstrdup(buf, GFP_KERNEL);
if (!cfg->c.label) {
ret = -ENOMEM;
goto err;
}
cfg->c.bConfigurationValue = num;
cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW;
cfg->c.bmAttributes = USB_CONFIG_ATT_ONE;
INIT_LIST_HEAD(&cfg->string_list);
INIT_LIST_HEAD(&cfg->func_list);
config_group_init_type_name(&cfg->group, name,
&gadget_config_type);
config_group_init_type_name(&cfg->strings_group, "strings",
&gadget_config_name_strings_type);
configfs_add_default_group(&cfg->strings_group, &cfg->group);
ret = usb_add_config_only(&gi->cdev, &cfg->c);
if (ret)
goto err;
return &cfg->group;
err:
kfree(cfg->c.label);
kfree(cfg);
return ERR_PTR(ret);
}
static void config_desc_drop(
struct config_group *group,
struct config_item *item)
{
config_item_put(item);
}
static struct configfs_group_operations config_desc_ops = {
.make_group = &config_desc_make,
.drop_item = &config_desc_drop,
};
static struct config_item_type config_desc_type = {
.ct_group_ops = &config_desc_ops,
.ct_owner = THIS_MODULE,
};
GS_STRINGS_RW(gadget_strings, manufacturer);
GS_STRINGS_RW(gadget_strings, product);
GS_STRINGS_RW(gadget_strings, serialnumber);
static struct configfs_attribute *gadget_strings_langid_attrs[] = {
&gadget_strings_attr_manufacturer,
&gadget_strings_attr_product,
&gadget_strings_attr_serialnumber,
NULL,
};
static void gadget_strings_attr_release(struct config_item *item)
{
struct gadget_strings *gs = to_gadget_strings(item);
kfree(gs->manufacturer);
kfree(gs->product);
kfree(gs->serialnumber);
list_del(&gs->list);
kfree(gs);
}
USB_CONFIG_STRING_RW_OPS(gadget_strings);
USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info);
static inline struct os_desc *to_os_desc(struct config_item *item)
{
return container_of(to_config_group(item), struct os_desc, group);
}
static inline struct gadget_info *os_desc_item_to_gadget_info(
struct config_item *item)
{
return to_gadget_info(to_os_desc(item)->group.cg_item.ci_parent);
}
static ssize_t os_desc_use_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n",
os_desc_item_to_gadget_info(item)->use_os_desc);
}
static ssize_t os_desc_use_store(struct config_item *item, const char *page,
size_t len)
{
struct gadget_info *gi = os_desc_item_to_gadget_info(item);
int ret;
bool use;
mutex_lock(&gi->lock);
ret = strtobool(page, &use);
if (!ret) {
gi->use_os_desc = use;
ret = len;
}
mutex_unlock(&gi->lock);
return ret;
}
static ssize_t os_desc_b_vendor_code_show(struct config_item *item, char *page)
{
return sprintf(page, "0x%02x\n",
os_desc_item_to_gadget_info(item)->b_vendor_code);
}
static ssize_t os_desc_b_vendor_code_store(struct config_item *item,
const char *page, size_t len)
{
struct gadget_info *gi = os_desc_item_to_gadget_info(item);
int ret;
u8 b_vendor_code;
mutex_lock(&gi->lock);
ret = kstrtou8(page, 0, &b_vendor_code);
if (!ret) {
gi->b_vendor_code = b_vendor_code;
ret = len;
}
mutex_unlock(&gi->lock);
return ret;
}
static ssize_t os_desc_qw_sign_show(struct config_item *item, char *page)
{
struct gadget_info *gi = os_desc_item_to_gadget_info(item);
int res;
res = utf16s_to_utf8s((wchar_t *) gi->qw_sign, OS_STRING_QW_SIGN_LEN,
UTF16_LITTLE_ENDIAN, page, PAGE_SIZE - 1);
page[res++] = '\n';
return res;
}
static ssize_t os_desc_qw_sign_store(struct config_item *item, const char *page,
size_t len)
{
struct gadget_info *gi = os_desc_item_to_gadget_info(item);
int res, l;
l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1);
if (page[l - 1] == '\n')
--l;
mutex_lock(&gi->lock);
res = utf8s_to_utf16s(page, l,
UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign,
OS_STRING_QW_SIGN_LEN);
if (res > 0)
res = len;
mutex_unlock(&gi->lock);
return res;
}
CONFIGFS_ATTR(os_desc_, use);
CONFIGFS_ATTR(os_desc_, b_vendor_code);
CONFIGFS_ATTR(os_desc_, qw_sign);
static struct configfs_attribute *os_desc_attrs[] = {
&os_desc_attr_use,
&os_desc_attr_b_vendor_code,
&os_desc_attr_qw_sign,
NULL,
};
static void os_desc_attr_release(struct config_item *item)
{
struct os_desc *os_desc = to_os_desc(item);
kfree(os_desc);
}
static int os_desc_link(struct config_item *os_desc_ci,
struct config_item *usb_cfg_ci)
{
struct gadget_info *gi = container_of(to_config_group(os_desc_ci),
struct gadget_info, os_desc_group);
struct usb_composite_dev *cdev = &gi->cdev;
struct config_usb_cfg *c_target =
container_of(to_config_group(usb_cfg_ci),
struct config_usb_cfg, group);
struct usb_configuration *c;
int ret;
mutex_lock(&gi->lock);
list_for_each_entry(c, &cdev->configs, list) {
if (c == &c_target->c)
break;
}
if (c != &c_target->c) {
ret = -EINVAL;
goto out;
}
if (cdev->os_desc_config) {
ret = -EBUSY;
goto out;
}
cdev->os_desc_config = &c_target->c;
ret = 0;
out:
mutex_unlock(&gi->lock);
return ret;
}
static void os_desc_unlink(struct config_item *os_desc_ci,
struct config_item *usb_cfg_ci)
{
struct gadget_info *gi = container_of(to_config_group(os_desc_ci),
struct gadget_info, os_desc_group);
struct usb_composite_dev *cdev = &gi->cdev;
mutex_lock(&gi->lock);
if (gi->composite.gadget_driver.udc_name)
unregister_gadget(gi);
cdev->os_desc_config = NULL;
WARN_ON(gi->composite.gadget_driver.udc_name);
mutex_unlock(&gi->lock);
}
static struct configfs_item_operations os_desc_ops = {
.release = os_desc_attr_release,
.allow_link = os_desc_link,
.drop_link = os_desc_unlink,
};
static struct config_item_type os_desc_type = {
.ct_item_ops = &os_desc_ops,
.ct_attrs = os_desc_attrs,
.ct_owner = THIS_MODULE,
};
static inline struct usb_os_desc_ext_prop
*to_usb_os_desc_ext_prop(struct config_item *item)
{
return container_of(item, struct usb_os_desc_ext_prop, item);
}
static ssize_t ext_prop_type_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n", to_usb_os_desc_ext_prop(item)->type);
}
static ssize_t ext_prop_type_store(struct config_item *item,
const char *page, size_t len)
{
struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item);
struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent);
u8 type;
int ret;
if (desc->opts_mutex)
mutex_lock(desc->opts_mutex);
ret = kstrtou8(page, 0, &type);
if (ret)
goto end;
if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) {
ret = -EINVAL;
goto end;
}
if ((ext_prop->type == USB_EXT_PROP_BINARY ||
ext_prop->type == USB_EXT_PROP_LE32 ||
ext_prop->type == USB_EXT_PROP_BE32) &&
(type == USB_EXT_PROP_UNICODE ||
type == USB_EXT_PROP_UNICODE_ENV ||
type == USB_EXT_PROP_UNICODE_LINK))
ext_prop->data_len <<= 1;
else if ((ext_prop->type == USB_EXT_PROP_UNICODE ||
ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||
ext_prop->type == USB_EXT_PROP_UNICODE_LINK) &&
(type == USB_EXT_PROP_BINARY ||
type == USB_EXT_PROP_LE32 ||
type == USB_EXT_PROP_BE32))
ext_prop->data_len >>= 1;
ext_prop->type = type;
ret = len;
end:
if (desc->opts_mutex)
mutex_unlock(desc->opts_mutex);
return ret;
}
static ssize_t ext_prop_data_show(struct config_item *item, char *page)
{
struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item);
int len = ext_prop->data_len;
if (ext_prop->type == USB_EXT_PROP_UNICODE ||
ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||
ext_prop->type == USB_EXT_PROP_UNICODE_LINK)
len >>= 1;
memcpy(page, ext_prop->data, len);
return len;
}
static ssize_t ext_prop_data_store(struct config_item *item,
const char *page, size_t len)
{
struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item);
struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent);
char *new_data;
size_t ret_len = len;
if (page[len - 1] == '\n' || page[len - 1] == '\0')
--len;
new_data = kmemdup(page, len, GFP_KERNEL);
if (!new_data)
return -ENOMEM;
if (desc->opts_mutex)
mutex_lock(desc->opts_mutex);
kfree(ext_prop->data);
ext_prop->data = new_data;
desc->ext_prop_len -= ext_prop->data_len;
ext_prop->data_len = len;
desc->ext_prop_len += ext_prop->data_len;
if (ext_prop->type == USB_EXT_PROP_UNICODE ||
ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||
ext_prop->type == USB_EXT_PROP_UNICODE_LINK) {
desc->ext_prop_len -= ext_prop->data_len;
ext_prop->data_len <<= 1;
ext_prop->data_len += 2;
desc->ext_prop_len += ext_prop->data_len;
}
if (desc->opts_mutex)
mutex_unlock(desc->opts_mutex);
return ret_len;
}
CONFIGFS_ATTR(ext_prop_, type);
CONFIGFS_ATTR(ext_prop_, data);
static struct configfs_attribute *ext_prop_attrs[] = {
&ext_prop_attr_type,
&ext_prop_attr_data,
NULL,
};
static void usb_os_desc_ext_prop_release(struct config_item *item)
{
struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item);
kfree(ext_prop); /* frees a whole chunk */
}
static struct configfs_item_operations ext_prop_ops = {
.release = usb_os_desc_ext_prop_release,
};
static struct config_item *ext_prop_make(
struct config_group *group,
const char *name)
{
struct usb_os_desc_ext_prop *ext_prop;
struct config_item_type *ext_prop_type;
struct usb_os_desc *desc;
char *vlabuf;
vla_group(data_chunk);
vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1);
vla_item(data_chunk, struct config_item_type, ext_prop_type, 1);
vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL);
if (!vlabuf)
return ERR_PTR(-ENOMEM);
ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop);
ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type);
desc = container_of(group, struct usb_os_desc, group);
ext_prop_type->ct_item_ops = &ext_prop_ops;
ext_prop_type->ct_attrs = ext_prop_attrs;
ext_prop_type->ct_owner = desc->owner;
config_item_init_type_name(&ext_prop->item, name, ext_prop_type);
ext_prop->name = kstrdup(name, GFP_KERNEL);
if (!ext_prop->name) {
kfree(vlabuf);
return ERR_PTR(-ENOMEM);
}
desc->ext_prop_len += 14;
ext_prop->name_len = 2 * strlen(ext_prop->name) + 2;
if (desc->opts_mutex)
mutex_lock(desc->opts_mutex);
desc->ext_prop_len += ext_prop->name_len;
list_add_tail(&ext_prop->entry, &desc->ext_prop);
++desc->ext_prop_count;
if (desc->opts_mutex)
mutex_unlock(desc->opts_mutex);
return &ext_prop->item;
}
static void ext_prop_drop(struct config_group *group, struct config_item *item)
{
struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item);
struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item);
if (desc->opts_mutex)
mutex_lock(desc->opts_mutex);
list_del(&ext_prop->entry);
--desc->ext_prop_count;
kfree(ext_prop->name);
desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14);
if (desc->opts_mutex)
mutex_unlock(desc->opts_mutex);
config_item_put(item);
}
static struct configfs_group_operations interf_grp_ops = {
.make_item = &ext_prop_make,
.drop_item = &ext_prop_drop,
};
static ssize_t interf_grp_compatible_id_show(struct config_item *item,
char *page)
{
memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8);
return 8;
}
static ssize_t interf_grp_compatible_id_store(struct config_item *item,
const char *page, size_t len)
{
struct usb_os_desc *desc = to_usb_os_desc(item);
int l;
l = min_t(int, 8, len);
if (page[l - 1] == '\n')
--l;
if (desc->opts_mutex)
mutex_lock(desc->opts_mutex);
memcpy(desc->ext_compat_id, page, l);
if (desc->opts_mutex)
mutex_unlock(desc->opts_mutex);
return len;
}
static ssize_t interf_grp_sub_compatible_id_show(struct config_item *item,
char *page)
{
memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8);
return 8;
}
static ssize_t interf_grp_sub_compatible_id_store(struct config_item *item,
const char *page, size_t len)
{
struct usb_os_desc *desc = to_usb_os_desc(item);
int l;
l = min_t(int, 8, len);
if (page[l - 1] == '\n')
--l;
if (desc->opts_mutex)
mutex_lock(desc->opts_mutex);
memcpy(desc->ext_compat_id + 8, page, l);
if (desc->opts_mutex)
mutex_unlock(desc->opts_mutex);
return len;
}
CONFIGFS_ATTR(interf_grp_, compatible_id);
CONFIGFS_ATTR(interf_grp_, sub_compatible_id);
static struct configfs_attribute *interf_grp_attrs[] = {
&interf_grp_attr_compatible_id,
&interf_grp_attr_sub_compatible_id,
NULL
};
struct config_group *usb_os_desc_prepare_interf_dir(
struct config_group *parent,
int n_interf,
struct usb_os_desc **desc,
char **names,
struct module *owner)
{
struct config_group *os_desc_group;
struct config_item_type *os_desc_type, *interface_type;
vla_group(data_chunk);
vla_item(data_chunk, struct config_group, os_desc_group, 1);
vla_item(data_chunk, struct config_item_type, os_desc_type, 1);
vla_item(data_chunk, struct config_item_type, interface_type, 1);
char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL);
if (!vlabuf)
return ERR_PTR(-ENOMEM);
os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group);
os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type);
interface_type = vla_ptr(vlabuf, data_chunk, interface_type);
os_desc_type->ct_owner = owner;
config_group_init_type_name(os_desc_group, "os_desc", os_desc_type);
configfs_add_default_group(os_desc_group, parent);
interface_type->ct_group_ops = &interf_grp_ops;
interface_type->ct_attrs = interf_grp_attrs;
interface_type->ct_owner = owner;
while (n_interf--) {
struct usb_os_desc *d;
d = desc[n_interf];
d->owner = owner;
config_group_init_type_name(&d->group, "", interface_type);
config_item_set_name(&d->group.cg_item, "interface.%s",
names[n_interf]);
configfs_add_default_group(&d->group, os_desc_group);
}
return os_desc_group;
}
EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir);
static int configfs_do_nothing(struct usb_composite_dev *cdev)
{
WARN_ON(1);
return -EINVAL;
}
int composite_dev_prepare(struct usb_composite_driver *composite,
struct usb_composite_dev *dev);
int composite_os_desc_req_prepare(struct usb_composite_dev *cdev,
struct usb_ep *ep0);
static void purge_configs_funcs(struct gadget_info *gi)
{
struct usb_configuration *c;
list_for_each_entry(c, &gi->cdev.configs, list) {
struct usb_function *f, *tmp;
struct config_usb_cfg *cfg;
cfg = container_of(c, struct config_usb_cfg, c);
list_for_each_entry_safe(f, tmp, &c->functions, list) {
list_move_tail(&f->list, &cfg->func_list);
if (f->unbind) {
dev_err(&gi->cdev.gadget->dev,
"unbind function '%s'/%pK\n",
f->name, f);
f->unbind(c, f);
}
}
c->next_interface_id = 0;
memset(c->interface, 0, sizeof(c->interface));
c->superspeed_plus = 0;
c->superspeed = 0;
c->highspeed = 0;
c->fullspeed = 0;
}
}
static int configfs_composite_bind(struct usb_gadget *gadget,
struct usb_gadget_driver *gdriver)
{
struct usb_composite_driver *composite = to_cdriver(gdriver);
struct gadget_info *gi = container_of(composite,
struct gadget_info, composite);
struct usb_composite_dev *cdev = &gi->cdev;
struct usb_configuration *c;
struct usb_string *s;
unsigned i;
int ret;
/* the gi->lock is hold by the caller */
cdev->gadget = gadget;
set_gadget_data(gadget, cdev);
ret = composite_dev_prepare(composite, cdev);
if (ret)
return ret;
/* and now the gadget bind */
ret = -EINVAL;
if (list_empty(&gi->cdev.configs)) {
pr_err("Need at least one configuration in %s.\n",
gi->composite.name);
goto err_comp_cleanup;
}
list_for_each_entry(c, &gi->cdev.configs, list) {
struct config_usb_cfg *cfg;
cfg = container_of(c, struct config_usb_cfg, c);
if (list_empty(&cfg->func_list)) {
pr_err("Config %s/%d of %s needs at least one function.\n",
c->label, c->bConfigurationValue,
gi->composite.name);
goto err_comp_cleanup;
}
}
/* init all strings */
if (!list_empty(&gi->string_list)) {
struct gadget_strings *gs;
i = 0;
list_for_each_entry(gs, &gi->string_list, list) {
gi->gstrings[i] = &gs->stringtab_dev;
gs->stringtab_dev.strings = gs->strings;
gs->strings[USB_GADGET_MANUFACTURER_IDX].s =
gs->manufacturer;
gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product;
#ifndef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
if (gs->serialnumber && !set_alt_serialnumber(gs))
pr_info("usb: serial number: %s\n",
gs->serialnumber);
#endif
gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber;
i++;
}
gi->gstrings[i] = NULL;
s = usb_gstrings_attach(&gi->cdev, gi->gstrings,
USB_GADGET_FIRST_AVAIL_IDX);
if (IS_ERR(s)) {
ret = PTR_ERR(s);
goto err_comp_cleanup;
}
gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id;
gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id;
gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id;
}
if (gi->use_os_desc) {
cdev->use_os_string = true;
cdev->b_vendor_code = gi->b_vendor_code;
memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN);
}
if (gadget_is_otg(gadget) && !otg_desc[0]) {
struct usb_descriptor_header *usb_desc;
usb_desc = usb_otg_descriptor_alloc(gadget);
if (!usb_desc) {
ret = -ENOMEM;
goto err_comp_cleanup;
}
usb_otg_descriptor_init(gadget, usb_desc);
otg_desc[0] = usb_desc;
otg_desc[1] = NULL;
}
/* Go through all configs, attach all functions */
list_for_each_entry(c, &gi->cdev.configs, list) {
struct config_usb_cfg *cfg;
struct usb_function *f;
struct usb_function *tmp;
struct gadget_config_name *cn;
if (gadget_is_otg(gadget))
c->descriptors = otg_desc;
cfg = container_of(c, struct config_usb_cfg, c);
if (!list_empty(&cfg->string_list)) {
i = 0;
list_for_each_entry(cn, &cfg->string_list, list) {
cfg->gstrings[i] = &cn->stringtab_dev;
cn->stringtab_dev.strings = &cn->strings;
cn->strings.s = cn->configuration;
i++;
}
cfg->gstrings[i] = NULL;
s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1);
if (IS_ERR(s)) {
ret = PTR_ERR(s);
goto err_comp_cleanup;
}
c->iConfiguration = s[0].id;
}
list_for_each_entry_safe(f, tmp, &cfg->func_list, list) {
list_del(&f->list);
ret = usb_add_function(c, f);
if (ret) {
list_add(&f->list, &cfg->func_list);
goto err_purge_funcs;
}
}
usb_ep_autoconfig_reset(cdev->gadget);
}
if (cdev->use_os_string) {
ret = composite_os_desc_req_prepare(cdev, gadget->ep0);
if (ret)
goto err_purge_funcs;
}
usb_ep_autoconfig_reset(cdev->gadget);
return 0;
err_purge_funcs:
purge_configs_funcs(gi);
err_comp_cleanup:
composite_dev_cleanup(cdev);
return ret;
}
#ifdef CONFIG_USB_CONFIGFS_UEVENT
static void android_work(struct work_struct *data)
{
struct gadget_info *gi = container_of(data, struct gadget_info, work);
struct usb_composite_dev *cdev = &gi->cdev;
char *disconnected[2] = { "USB_STATE=DISCONNECTED", NULL };
char *connected[2] = { "USB_STATE=CONNECTED", NULL };
char *configured[2] = { "USB_STATE=CONFIGURED", NULL };
/* 0-connected 1-configured 2-disconnected*/
bool status[3] = { false, false, false };
unsigned long flags;
bool uevent_sent = false;
if (!android_device && IS_ERR(android_device)) {
pr_info("usb: cannot send uevent because android_device not available \n");
return;
}
spin_lock_irqsave(&cdev->lock, flags);
if (cdev->config)
status[1] = true;
if (gi->connected != gi->sw_connected) {
if (gi->connected)
status[0] = true;
else
status[2] = true;
gi->sw_connected = gi->connected;
}
spin_unlock_irqrestore(&cdev->lock, flags);
if (status[0]) {
kobject_uevent_env(&android_device->kobj,
KOBJ_CHANGE, connected);
pr_info("usb: %s: sent uevent %s\n", __func__, connected[0]);
uevent_sent = true;
#ifdef CONFIG_USB_NOTIFY_PROC_LOG
store_usblog_notify(NOTIFY_USBSTATE, (void *)connected[0], NULL);
#endif
#ifdef CONFIG_USB_TYPEC_MANAGER_NOTIFIER
if (cdev->desc.bcdUSB == 0x310)
set_usb_enumeration_state(0x310); // Super-Speed
else
set_usb_enumeration_state(0x210); // High-Speed
#endif
}
if (status[1]) {
kobject_uevent_env(&android_device->kobj,
KOBJ_CHANGE, configured);
pr_info("usb: %s: sent uevent %s\n", __func__, configured[0]);
uevent_sent = true;
#ifdef CONFIG_USB_NOTIFY_PROC_LOG
store_usblog_notify(NOTIFY_USBSTATE, (void *)configured[0], NULL);
#endif
}
if (status[2]) {
kobject_uevent_env(&android_device->kobj,
KOBJ_CHANGE, disconnected);
pr_info("usb: %s: sent uevent %s\n", __func__, disconnected[0]);
uevent_sent = true;
#ifdef CONFIG_USB_NOTIFY_PROC_LOG
store_usblog_notify(NOTIFY_USBSTATE, (void *)disconnected[0], NULL);
#endif
}
if (!uevent_sent) {
pr_info("usb: %s: did not send uevent (%d %d %pK)\n", __func__,
gi->connected, gi->sw_connected, cdev->config);
}
}
#endif
static void configfs_composite_unbind(struct usb_gadget *gadget)
{
struct usb_composite_dev *cdev;
struct gadget_info *gi;
/* the gi->lock is hold by the caller */
cdev = get_gadget_data(gadget);
gi = container_of(cdev, struct gadget_info, cdev);
kfree(otg_desc[0]);
otg_desc[0] = NULL;
purge_configs_funcs(gi);
composite_dev_cleanup(cdev);
usb_ep_autoconfig_reset(cdev->gadget);
cdev->gadget = NULL;
set_gadget_data(gadget, NULL);
}
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
static void android_gadget_complete(struct usb_ep *ep, struct usb_request *req)
{
if (req->status || req->actual != req->length)
printk(KERN_DEBUG "usb: %s: %d, %d/%d\n", __func__,
req->status, req->actual, req->length);
}
#endif
#ifdef CONFIG_USB_CONFIGFS_UEVENT
static int android_setup(struct usb_gadget *gadget,
const struct usb_ctrlrequest *c)
{
struct usb_composite_dev *cdev = get_gadget_data(gadget);
unsigned long flags;
struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
int value = -EOPNOTSUPP;
struct usb_function_instance *fi;
struct usb_configuration *configuration;
struct usb_function *f;
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
struct usb_request *req = cdev->req;
req->complete = android_gadget_complete;
#endif
spin_lock_irqsave(&cdev->lock, flags);
if (!gi->connected) {
gi->connected = 1;
schedule_work(&gi->work);
}
spin_unlock_irqrestore(&cdev->lock, flags);
list_for_each_entry(fi, &gi->available_func, cfs_list) {
if (fi != NULL && fi->f != NULL && fi->f->setup != NULL) {
value = fi->f->setup(fi->f, c);
if (value >= 0)
break;
}
}
list_for_each_entry(configuration, &cdev->configs, list) {
list_for_each_entry(f, &configuration->functions, list) {
if (f != NULL && f->ctrlrequest != NULL) {
value = f->ctrlrequest(f, c);
if (value >= 0)
break;
}
}
}
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
if (value < 0)
value = terminal_ctrl_request(cdev, c);
#endif
#ifdef CONFIG_USB_CONFIGFS_F_ACC
if (value < 0)
value = acc_ctrlrequest(cdev, c);
#endif
if (value < 0)
value = composite_setup(gadget, c);
spin_lock_irqsave(&cdev->lock, flags);
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
if (c->bRequest == USB_REQ_SET_CONFIGURATION &&
cdev->mute_switch == true)
cdev->mute_switch = false;
#endif
if (c->bRequest == USB_REQ_SET_CONFIGURATION &&
cdev->config) {
schedule_work(&gi->work);
}
spin_unlock_irqrestore(&cdev->lock, flags);
return value;
}
static void android_disconnect(struct usb_gadget *gadget)
{
struct usb_composite_dev *cdev = get_gadget_data(gadget);
struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
/* FIXME: There's a race between usb_gadget_udc_stop() which is likely
* to set the gadget driver to NULL in the udc driver and this drivers
* gadget disconnect fn which likely checks for the gadget driver to
* be a null ptr. It happens that unbind (doing set_gadget_data(NULL))
* is called before the gadget driver is set to NULL and the udc driver
* calls disconnect fn which results in cdev being a null ptr.
*/
if (cdev == NULL) {
WARN(1, "%s: gadget driver already disconnected\n", __func__);
return;
}
/* accessory HID support can be active while the
accessory function is not actually enabled,
so we need to inform it when we are disconnected.
*/
#ifdef CONFIG_USB_CONFIGFS_F_ACC
acc_disconnect();
#endif
gi->connected = 0;
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
printk(KERN_DEBUG "usb: %s con(%d), sw(%d)\n",
__func__, gi->connected, gi->sw_connected);
/* avoid sending a disconnect switch event
* until after we disconnect.
*/
if (cdev->mute_switch) {
gi->sw_connected = gi->connected;
printk(KERN_DEBUG"usb: %s mute_switch con(%d) sw(%d)\n",
__func__, gi->connected, gi->sw_connected);
} else {
// set_ncm_ready(false);
if (cdev->force_disconnect) {
gi->sw_connected = 1;
printk(KERN_DEBUG"usb: %s force_disconnect\n",
__func__);
cdev->force_disconnect = 0;
}
printk(KERN_DEBUG"usb: %s schedule_work con(%d) sw(%d)\n",
__func__, gi->connected, gi->sw_connected);
schedule_work(&gi->work);
}
composite_disconnect(gadget);
#else
schedule_work(&gi->work);
composite_disconnect(gadget);
#endif
}
#endif
static const struct usb_gadget_driver configfs_driver_template = {
.bind = configfs_composite_bind,
.unbind = configfs_composite_unbind,
#ifdef CONFIG_USB_CONFIGFS_UEVENT
.setup = android_setup,
.reset = android_disconnect,
.disconnect = android_disconnect,
#else
.setup = composite_setup,
.reset = composite_disconnect,
.disconnect = composite_disconnect,
#endif
.suspend = composite_suspend,
.resume = composite_resume,
.max_speed = USB_SPEED_SUPER,
.driver = {
.owner = THIS_MODULE,
.name = "configfs-gadget",
},
.match_existing_only = 1,
};
#ifdef CONFIG_USB_CONFIGFS_UEVENT
static ssize_t
functions_show(struct device *pdev, struct device_attribute *attr, char *buf)
{
struct gadget_info *dev = dev_get_drvdata(pdev);
struct usb_composite_dev *cdev;
struct usb_configuration *c;
struct usb_function *f;
char *buff = buf;
cdev = &dev->cdev;
if (!cdev)
return -ENODEV;
mutex_lock(&dev->lock);
list_for_each_entry(c, &cdev->configs, list) {
list_for_each_entry(f, &c->functions, list) {
buff += sprintf(buff, "%s,", f->name);
}
}
mutex_unlock(&dev->lock);
if (buff != buf)
*(buff-1) = '\n';
return buff - buf;
}
static ssize_t
functions_store(struct device *pdev, struct device_attribute *attr,
const char *buff, size_t size)
{
struct gadget_info *dev = dev_get_drvdata(pdev);
struct usb_composite_dev *cdev;
struct usb_configuration *c;
struct config_usb_cfg *cfg;
struct usb_function *f, *tmp;
char *name;
char buf[256], *b;
cdev = &dev->cdev;
if (!cdev)
return -ENODEV;
mutex_lock(&dev->lock);
if (dev->enabled) {
mutex_unlock(&dev->lock);
pr_err("%s: gadget is enabled\n", __func__);
return -EBUSY;
}
strlcpy(buf, buff, sizeof(buf));
b = strim(buf);
printk("Function stored : %s\n", b);
#ifdef CONFIG_USB_NOTIFY_PROC_LOG
store_usblog_notify(NOTIFY_USBMODE, (void *)b, NULL);
#endif
while (b) {
name = strsep(&b, ",");
if (!name)
continue;
list_for_each_entry(c, &cdev->configs, list) {
cfg = container_of(c, struct config_usb_cfg, c);
list_for_each_entry_safe(f, tmp, &dev->linked_func, list) {
if (!strcmp(f->name, name)) {
pr_err("usb: %s: enable device[%s]\n", __func__, name);
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
if (!strcmp(f->name, "acm")) {
printk(KERN_DEBUG "usb: acm is enabled. (bcdDevice=0x400)\n");
/* Samsung KIES needs fixed bcdDevice number */
cdev->desc.bcdDevice = cpu_to_le16(0x0400);
}
#endif
list_move_tail(&f->list, &cfg->func_list);
}
}
}
}
mutex_unlock(&dev->lock);
return size;
}
static ssize_t enable_show(struct device *pdev, struct device_attribute *attr,
char *buf)
{
struct gadget_info *dev = dev_get_drvdata(pdev);
return sprintf(buf, "%d\n", dev->enabled);
}
static ssize_t enable_store(struct device *pdev, struct device_attribute *attr,
const char *buff, size_t size)
{
struct gadget_info *dev = dev_get_drvdata(pdev);
struct usb_composite_dev *cdev;
struct usb_gadget *gadget;
int enabled = 0;
if (!dev)
return -ENODEV;
cdev = &dev->cdev;
if (!cdev)
return -ENODEV;
gadget = cdev->gadget;
mutex_lock(&dev->lock);
sscanf(buff, "%d", &enabled);
if (enabled && !dev->enabled) {
pr_info("usb: %s: Connect gadget: enabled=%d, dev->enabled=%d\n",
__func__, enabled, dev->enabled);
#ifdef CONFIG_USB_NOTIFY_PROC_LOG
store_usblog_notify(NOTIFY_USBMODE_EXTRA, "enable 1", NULL);
#endif
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
cdev->next_string_id = 4; //composite string index
#else
cdev->next_string_id = 0;
#endif
if (!gadget) {
pr_info("usb: %s: Gadget is NULL\n", __func__);
mutex_unlock(&dev->lock);
return -ENODEV;
}
usb_gadget_connect(gadget);
dev->enabled = true;
#ifdef CONFIG_USB_TYPEC_MANAGER_NOTIFIER
set_usb_enable_state();
#endif
} else if (!enabled && dev->enabled) {
pr_info("usb: %s: Disconnect gadget: enabled=%d, dev->enabled=%d\n",
__func__, enabled, dev->enabled);
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
/* avoid sending a disconnect switch event
* until after we disconnect.
*/
cdev->mute_switch = true;
#endif
#ifdef CONFIG_USB_NOTIFY_PROC_LOG
store_usblog_notify(NOTIFY_USBMODE_EXTRA, "enable 0", NULL);
#endif
unregister_gadget(dev);
clear_current_usb_link(cdev);
dev->enabled = false;
} else {
#ifdef CONFIG_USB_NOTIFY_PROC_LOG
if (dev->enabled)
store_usblog_notify(NOTIFY_USBMODE_EXTRA, "already 1", NULL);
else
store_usblog_notify(NOTIFY_USBMODE_EXTRA, "already 0", NULL);
#endif
pr_err("usb: %s: already %s\n", __func__,
dev->enabled ? "enabled" : "disabled");
}
mutex_unlock(&dev->lock);
return size;
}
static ssize_t state_show(struct device *pdev, struct device_attribute *attr,
char *buf)
{
struct gadget_info *dev = dev_get_drvdata(pdev);
struct usb_composite_dev *cdev;
char *state = "DISCONNECTED";
unsigned long flags;
if (!dev)
goto out;
cdev = &dev->cdev;
if (!cdev)
goto out;
spin_lock_irqsave(&cdev->lock, flags);
if (cdev->config)
state = "CONFIGURED";
else if (dev->connected)
state = "CONNECTED";
spin_unlock_irqrestore(&cdev->lock, flags);
out:
return sprintf(buf, "%s\n", state);
}
static DEVICE_ATTR(functions, S_IRUGO | S_IWUSR, functions_show,
functions_store);
static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, enable_show, enable_store);
static DEVICE_ATTR(state, S_IRUGO, state_show, NULL);
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
static ssize_t
bcdUSB_show(struct device *pdev, struct device_attribute *attr, char *buf)
{
struct gadget_info *dev = dev_get_drvdata(pdev);
return sprintf(buf, "%04x\n", dev->cdev.desc.bcdUSB);
}
static DEVICE_ATTR(bcdUSB, S_IRUGO, bcdUSB_show, NULL);
#endif
static struct device_attribute *android_usb_attributes[] = {
&dev_attr_state,
&dev_attr_enable,
&dev_attr_functions,
#ifdef CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE
&dev_attr_bcdUSB,
#endif
NULL
};
static int android_device_create(struct gadget_info *gi)
{
struct device *device;
struct device_attribute **attrs;
struct device_attribute *attr;
INIT_WORK(&gi->work, android_work);
device = device_create(android_class, NULL,
MKDEV(0, 0), NULL, "android0");
if (IS_ERR(device))
return PTR_ERR(device);
android_device = device;
dev_set_drvdata(android_device, gi);
attrs = android_usb_attributes;
while ((attr = *attrs++)) {
int err;
err = device_create_file(android_device, attr);
if (err) {
device_destroy(android_device->class,
android_device->devt);
return err;
}
}
return 0;
}
static void android_device_destroy(void)
{
struct device_attribute **attrs;
struct device_attribute *attr;
attrs = android_usb_attributes;
while ((attr = *attrs++))
device_remove_file(android_device, attr);
device_destroy(android_device->class, android_device->devt);
}
#else
static inline int android_device_create(struct gadget_info *gi)
{
return 0;
}
static inline void android_device_destroy(void)
{
}
#endif
static struct config_group *gadgets_make(
struct config_group *group,
const char *name)
{
struct gadget_info *gi;
gi = kzalloc(sizeof(*gi), GFP_KERNEL);
if (!gi)
return ERR_PTR(-ENOMEM);
config_group_init_type_name(&gi->group, name, &gadget_root_type);
config_group_init_type_name(&gi->functions_group, "functions",
&functions_type);
configfs_add_default_group(&gi->functions_group, &gi->group);
config_group_init_type_name(&gi->configs_group, "configs",
&config_desc_type);
configfs_add_default_group(&gi->configs_group, &gi->group);
config_group_init_type_name(&gi->strings_group, "strings",
&gadget_strings_strings_type);
configfs_add_default_group(&gi->strings_group, &gi->group);
config_group_init_type_name(&gi->os_desc_group, "os_desc",
&os_desc_type);
configfs_add_default_group(&gi->os_desc_group, &gi->group);
gi->composite.bind = configfs_do_nothing;
gi->composite.unbind = configfs_do_nothing;
gi->composite.suspend = NULL;
gi->composite.resume = NULL;
gi->composite.max_speed = USB_SPEED_SUPER;
mutex_init(&gi->lock);
INIT_LIST_HEAD(&gi->string_list);
INIT_LIST_HEAD(&gi->available_func);
#ifdef CONFIG_USB_CONFIGFS_UEVENT
INIT_LIST_HEAD(&gi->linked_func);
#endif
composite_init_dev(&gi->cdev);
gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE;
gi->cdev.desc.bDescriptorType = USB_DT_DEVICE;
gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice());
gi->composite.gadget_driver = configfs_driver_template;
gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL);
gi->composite.name = gi->composite.gadget_driver.function;
if (!gi->composite.gadget_driver.function)
goto err;
if (android_device_create(gi) < 0) {
kfree(gi->composite.gadget_driver.function);
goto err;
}
return &gi->group;
err:
kfree(gi);
return ERR_PTR(-ENOMEM);
}
static void gadgets_drop(struct config_group *group, struct config_item *item)
{
config_item_put(item);
android_device_destroy();
}
static struct configfs_group_operations gadgets_ops = {
.make_group = &gadgets_make,
.drop_item = &gadgets_drop,
};
static struct config_item_type gadgets_type = {
.ct_group_ops = &gadgets_ops,
.ct_owner = THIS_MODULE,
};
static struct configfs_subsystem gadget_subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "usb_gadget",
.ci_type = &gadgets_type,
},
},
.su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex),
};
void unregister_gadget_item(struct config_item *item)
{
struct gadget_info *gi = to_gadget_info(item);
mutex_lock(&gi->lock);
unregister_gadget(gi);
mutex_unlock(&gi->lock);
}
EXPORT_SYMBOL_GPL(unregister_gadget_item);
static int __init gadget_cfs_init(void)
{
int ret;
config_group_init(&gadget_subsys.su_group);
ret = configfs_register_subsystem(&gadget_subsys);
#ifdef CONFIG_USB_CONFIGFS_UEVENT
android_class = class_create(THIS_MODULE, "android_usb");
if (IS_ERR(android_class))
return PTR_ERR(android_class);
#endif
return ret;
}
module_init(gadget_cfs_init);
static void __exit gadget_cfs_exit(void)
{
configfs_unregister_subsystem(&gadget_subsys);
#ifdef CONFIG_USB_CONFIGFS_UEVENT
if (!IS_ERR(android_class))
class_destroy(android_class);
#endif
}
module_exit(gadget_cfs_exit);
Reference in New Issue View Git Blame Copy Permalink