![Linus Torvalds](/assets/img/avatar_default.png)
- proper use of the bool type (Thomas Meyer) - constification of struct config_item_type (Bhumika Goyal) -----BEGIN PGP SIGNATURE----- iQI/BAABCAApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAloLSTALHGhjaEBsc3Qu ZGUACgkQD55TZVIEUYNxfhAAv3cunxiEPEAvs+1xuGd3cZYaxz7qinvIODPxIKoF kRWiuy5PUklRMnJ8seOgJ1p1QokX6Sk4cZ8HcctDJVByqODjOq4K5eaKVN1ZqJoz BUzO/gOqfs64r9yaFIlKfe8nFA+gpUftSeWyv3lThxAIJ1iSbue7OZ/A10tTOS1m RWp9FPepFv+nJMfWqeQU64BsoDQ4kgZ2NcEA+jFxNx5dlmIbLD49tk0lfddvZQXr j5WyAH73iugilLtNUGVOqSzHBY4kUvfCKUV7leirCegyMoGhFtA87m6Wzwbo6ZUI DwQLzWvuPaGv1P2PpNEHfKiNbfIEp75DRyyyf87DD3lc5ffAxQSm28mGuwcr7Rn5 Ow/yWL6ERMzCLExoCzEkXYJISy7T5LIzYDgNggKMpeWxysAduF7Onx7KfW1bTuhK mHvY7iOXCjEvaIVaF8uMKE6zvuY1vCMRXaJ+kC9jcIE3gwhg+2hmQvrdJ2uAFXY+ rkeF2Poj/JlblPU4IKWAjiPUbzB7Lv0gkypCB2pD4riaYIN5qCAgF8ULIGQp2hsO lYW1EEgp5FBop85oSO/HAGWeH9dFg0WaV7WqNRVv0AGXhKjgy+bVd7iYPpvs7mGw z9IqSQDORcG2ETLcFhZgiJpCk/itwqXBD+wgMOjJPP8lL+4kZ8FcuhtY9kc9WlJE Tew= =+tMO -----END PGP SIGNATURE----- Merge tag 'configfs-for-4.15' of git://git.infradead.org/users/hch/configfs Pull configfs updates from Christoph Hellwig: "A couple of configfs cleanups: - proper use of the bool type (Thomas Meyer) - constification of struct config_item_type (Bhumika Goyal)" * tag 'configfs-for-4.15' of git://git.infradead.org/users/hch/configfs: RDMA/cma: make config_item_type const stm class: make config_item_type const ACPI: configfs: make config_item_type const nvmet: make config_item_type const usb: gadget: configfs: make config_item_type const PCI: endpoint: make config_item_type const iio: make function argument and some structures const usb: gadget: make config_item_type structures const dlm: make config_item_type const netconsole: make config_item_type const nullb: make config_item_type const ocfs2/cluster: make config_item_type const target: make config_item_type const configfs: make ci_type field, some pointers and function arguments const configfs: make config_item_type const configfs: Fix bool initialization/comparison
1521 lines
37 KiB
C
1521 lines
37 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/configfs.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/nls.h>
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#include <linux/usb/composite.h>
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#include <linux/usb/gadget_configfs.h>
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#include "configfs.h"
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#include "u_f.h"
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#include "u_os_desc.h"
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int check_user_usb_string(const char *name,
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struct usb_gadget_strings *stringtab_dev)
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{
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unsigned primary_lang;
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unsigned sub_lang;
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u16 num;
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int ret;
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ret = kstrtou16(name, 0, &num);
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if (ret)
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return ret;
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primary_lang = num & 0x3ff;
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sub_lang = num >> 10;
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/* simple sanity check for valid langid */
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switch (primary_lang) {
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case 0:
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case 0x62 ... 0xfe:
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case 0x100 ... 0x3ff:
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return -EINVAL;
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}
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if (!sub_lang)
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return -EINVAL;
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stringtab_dev->language = num;
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return 0;
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}
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#define MAX_NAME_LEN 40
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#define MAX_USB_STRING_LANGS 2
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static const struct usb_descriptor_header *otg_desc[2];
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struct gadget_info {
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struct config_group group;
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struct config_group functions_group;
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struct config_group configs_group;
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struct config_group strings_group;
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struct config_group os_desc_group;
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struct mutex lock;
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struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1];
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struct list_head string_list;
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struct list_head available_func;
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struct usb_composite_driver composite;
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struct usb_composite_dev cdev;
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bool use_os_desc;
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char b_vendor_code;
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char qw_sign[OS_STRING_QW_SIGN_LEN];
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};
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static inline struct gadget_info *to_gadget_info(struct config_item *item)
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{
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return container_of(to_config_group(item), struct gadget_info, group);
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}
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struct config_usb_cfg {
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struct config_group group;
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struct config_group strings_group;
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struct list_head string_list;
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struct usb_configuration c;
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struct list_head func_list;
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struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1];
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};
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static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item)
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{
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return container_of(to_config_group(item), struct config_usb_cfg,
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group);
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}
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struct gadget_strings {
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struct usb_gadget_strings stringtab_dev;
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struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX];
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char *manufacturer;
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char *product;
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char *serialnumber;
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struct config_group group;
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struct list_head list;
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};
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struct os_desc {
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struct config_group group;
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};
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struct gadget_config_name {
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struct usb_gadget_strings stringtab_dev;
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struct usb_string strings;
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char *configuration;
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struct config_group group;
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struct list_head list;
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};
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static int usb_string_copy(const char *s, char **s_copy)
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{
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int ret;
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char *str;
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char *copy = *s_copy;
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ret = strlen(s);
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if (ret > 126)
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return -EOVERFLOW;
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str = kstrdup(s, GFP_KERNEL);
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if (!str)
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return -ENOMEM;
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if (str[ret - 1] == '\n')
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str[ret - 1] = '\0';
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kfree(copy);
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*s_copy = str;
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return 0;
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}
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#define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \
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static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \
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char *page) \
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{ \
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return sprintf(page, "0x%02x\n", \
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to_gadget_info(item)->cdev.desc.__name); \
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}
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#define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \
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static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \
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char *page) \
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{ \
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return sprintf(page, "0x%04x\n", \
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le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \
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}
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#define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \
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static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \
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const char *page, size_t len) \
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{ \
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u8 val; \
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int ret; \
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ret = kstrtou8(page, 0, &val); \
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if (ret) \
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return ret; \
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to_gadget_info(item)->cdev.desc._name = val; \
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return len; \
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}
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#define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \
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static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \
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const char *page, size_t len) \
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{ \
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u16 val; \
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int ret; \
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ret = kstrtou16(page, 0, &val); \
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if (ret) \
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return ret; \
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to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val); \
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return len; \
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}
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#define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \
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GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \
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GI_DEVICE_DESC_SIMPLE_W_##_type(_name)
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GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB);
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GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8);
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GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8);
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GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8);
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GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8);
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GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16);
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GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16);
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GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice);
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static ssize_t is_valid_bcd(u16 bcd_val)
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{
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if ((bcd_val & 0xf) > 9)
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return -EINVAL;
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if (((bcd_val >> 4) & 0xf) > 9)
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return -EINVAL;
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if (((bcd_val >> 8) & 0xf) > 9)
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return -EINVAL;
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if (((bcd_val >> 12) & 0xf) > 9)
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return -EINVAL;
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return 0;
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}
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static ssize_t gadget_dev_desc_bcdDevice_store(struct config_item *item,
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const char *page, size_t len)
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{
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u16 bcdDevice;
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int ret;
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ret = kstrtou16(page, 0, &bcdDevice);
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if (ret)
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return ret;
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ret = is_valid_bcd(bcdDevice);
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if (ret)
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return ret;
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to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice);
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return len;
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}
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static ssize_t gadget_dev_desc_bcdUSB_store(struct config_item *item,
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const char *page, size_t len)
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{
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u16 bcdUSB;
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int ret;
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ret = kstrtou16(page, 0, &bcdUSB);
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if (ret)
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return ret;
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ret = is_valid_bcd(bcdUSB);
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if (ret)
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return ret;
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to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB);
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return len;
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}
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static ssize_t gadget_dev_desc_UDC_show(struct config_item *item, char *page)
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{
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char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name;
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return sprintf(page, "%s\n", udc_name ?: "");
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}
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static int unregister_gadget(struct gadget_info *gi)
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{
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int ret;
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if (!gi->composite.gadget_driver.udc_name)
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return -ENODEV;
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ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver);
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if (ret)
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return ret;
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kfree(gi->composite.gadget_driver.udc_name);
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gi->composite.gadget_driver.udc_name = NULL;
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return 0;
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}
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static ssize_t gadget_dev_desc_UDC_store(struct config_item *item,
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const char *page, size_t len)
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{
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struct gadget_info *gi = to_gadget_info(item);
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char *name;
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int ret;
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name = kstrdup(page, GFP_KERNEL);
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if (!name)
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return -ENOMEM;
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if (name[len - 1] == '\n')
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name[len - 1] = '\0';
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mutex_lock(&gi->lock);
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if (!strlen(name)) {
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ret = unregister_gadget(gi);
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if (ret)
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goto err;
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kfree(name);
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} else {
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if (gi->composite.gadget_driver.udc_name) {
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ret = -EBUSY;
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goto err;
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}
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gi->composite.gadget_driver.udc_name = name;
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ret = usb_gadget_probe_driver(&gi->composite.gadget_driver);
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if (ret) {
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gi->composite.gadget_driver.udc_name = NULL;
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goto err;
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}
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}
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mutex_unlock(&gi->lock);
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return len;
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err:
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kfree(name);
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mutex_unlock(&gi->lock);
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return ret;
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}
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CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass);
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CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass);
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CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol);
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CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0);
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CONFIGFS_ATTR(gadget_dev_desc_, idVendor);
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CONFIGFS_ATTR(gadget_dev_desc_, idProduct);
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CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice);
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CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB);
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CONFIGFS_ATTR(gadget_dev_desc_, UDC);
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static struct configfs_attribute *gadget_root_attrs[] = {
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&gadget_dev_desc_attr_bDeviceClass,
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&gadget_dev_desc_attr_bDeviceSubClass,
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&gadget_dev_desc_attr_bDeviceProtocol,
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&gadget_dev_desc_attr_bMaxPacketSize0,
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&gadget_dev_desc_attr_idVendor,
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&gadget_dev_desc_attr_idProduct,
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&gadget_dev_desc_attr_bcdDevice,
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&gadget_dev_desc_attr_bcdUSB,
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&gadget_dev_desc_attr_UDC,
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NULL,
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};
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static inline struct gadget_strings *to_gadget_strings(struct config_item *item)
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{
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return container_of(to_config_group(item), struct gadget_strings,
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group);
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}
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static inline struct gadget_config_name *to_gadget_config_name(
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struct config_item *item)
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{
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return container_of(to_config_group(item), struct gadget_config_name,
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group);
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}
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static inline struct usb_function_instance *to_usb_function_instance(
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struct config_item *item)
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{
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return container_of(to_config_group(item),
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struct usb_function_instance, group);
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}
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static void gadget_info_attr_release(struct config_item *item)
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{
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struct gadget_info *gi = to_gadget_info(item);
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WARN_ON(!list_empty(&gi->cdev.configs));
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WARN_ON(!list_empty(&gi->string_list));
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WARN_ON(!list_empty(&gi->available_func));
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kfree(gi->composite.gadget_driver.function);
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kfree(gi);
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}
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static struct configfs_item_operations gadget_root_item_ops = {
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.release = gadget_info_attr_release,
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};
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static void gadget_config_attr_release(struct config_item *item)
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{
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struct config_usb_cfg *cfg = to_config_usb_cfg(item);
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WARN_ON(!list_empty(&cfg->c.functions));
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list_del(&cfg->c.list);
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kfree(cfg->c.label);
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kfree(cfg);
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}
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static int config_usb_cfg_link(
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struct config_item *usb_cfg_ci,
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struct config_item *usb_func_ci)
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{
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struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci);
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struct usb_composite_dev *cdev = cfg->c.cdev;
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struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
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struct config_group *group = to_config_group(usb_func_ci);
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struct usb_function_instance *fi = container_of(group,
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struct usb_function_instance, group);
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struct usb_function_instance *a_fi;
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struct usb_function *f;
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int ret;
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mutex_lock(&gi->lock);
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/*
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* Make sure this function is from within our _this_ gadget and not
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* from another gadget or a random directory.
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* Also a function instance can only be linked once.
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*/
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list_for_each_entry(a_fi, &gi->available_func, cfs_list) {
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if (a_fi == fi)
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break;
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}
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if (a_fi != fi) {
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ret = -EINVAL;
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goto out;
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}
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list_for_each_entry(f, &cfg->func_list, list) {
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if (f->fi == fi) {
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ret = -EEXIST;
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goto out;
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}
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}
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f = usb_get_function(fi);
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if (IS_ERR(f)) {
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ret = PTR_ERR(f);
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goto out;
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}
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/* stash the function until we bind it to the gadget */
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list_add_tail(&f->list, &cfg->func_list);
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ret = 0;
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out:
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mutex_unlock(&gi->lock);
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return ret;
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}
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|
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static void config_usb_cfg_unlink(
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struct config_item *usb_cfg_ci,
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struct config_item *usb_func_ci)
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{
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struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci);
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struct usb_composite_dev *cdev = cfg->c.cdev;
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struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
|
|
|
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struct config_group *group = to_config_group(usb_func_ci);
|
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struct usb_function_instance *fi = container_of(group,
|
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struct usb_function_instance, group);
|
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struct usb_function *f;
|
|
|
|
/*
|
|
* ideally I would like to forbid to unlink functions while a gadget is
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* bound to an UDC. Since this isn't possible at the moment, we simply
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* force an unbind, the function is available here and then we can
|
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* remove the function.
|
|
*/
|
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mutex_lock(&gi->lock);
|
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if (gi->composite.gadget_driver.udc_name)
|
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unregister_gadget(gi);
|
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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);
|
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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 const struct config_item_type gadget_config_type = {
|
|
.ct_item_ops = &gadget_config_item_ops,
|
|
.ct_attrs = gadget_config_attrs,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static const 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 const 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 const 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_dbg(&gi->cdev.gadget->dev,
|
|
"unbind function '%s'/%p\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;
|
|
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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static const struct usb_gadget_driver configfs_driver_template = {
|
|
.bind = configfs_composite_bind,
|
|
.unbind = configfs_composite_unbind,
|
|
|
|
.setup = composite_setup,
|
|
.reset = composite_disconnect,
|
|
.disconnect = composite_disconnect,
|
|
|
|
.suspend = composite_suspend,
|
|
.resume = composite_resume,
|
|
|
|
.max_speed = USB_SPEED_SUPER,
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "configfs-gadget",
|
|
},
|
|
.match_existing_only = 1,
|
|
};
|
|
|
|
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);
|
|
|
|
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;
|
|
|
|
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);
|
|
}
|
|
|
|
static struct configfs_group_operations gadgets_ops = {
|
|
.make_group = &gadgets_make,
|
|
.drop_item = &gadgets_drop,
|
|
};
|
|
|
|
static const 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);
|
|
return ret;
|
|
}
|
|
module_init(gadget_cfs_init);
|
|
|
|
static void __exit gadget_cfs_exit(void)
|
|
{
|
|
configfs_unregister_subsystem(&gadget_subsys);
|
|
}
|
|
module_exit(gadget_cfs_exit);
|