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1690 lines
41 KiB
1690 lines
41 KiB
// 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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|
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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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u16 num; |
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int ret; |
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|
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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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if (!usb_validate_langid(num)) |
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return -EINVAL; |
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|
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stringtab_dev->language = num; |
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return 0; |
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} |
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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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|
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static const struct usb_descriptor_header *otg_desc[2]; |
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|
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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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|
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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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|
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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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spinlock_t spinlock; |
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bool unbind; |
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}; |
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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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|
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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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|
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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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|
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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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|
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struct config_group group; |
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struct list_head list; |
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}; |
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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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|
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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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|
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struct config_group group; |
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struct list_head list; |
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}; |
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|
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#define USB_MAX_STRING_WITH_NULL_LEN (USB_MAX_STRING_LEN+1) |
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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 > USB_MAX_STRING_LEN) |
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return -EOVERFLOW; |
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|
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if (copy) { |
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str = copy; |
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} else { |
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str = kmalloc(USB_MAX_STRING_WITH_NULL_LEN, GFP_KERNEL); |
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if (!str) |
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return -ENOMEM; |
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} |
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strcpy(str, s); |
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if (str[ret - 1] == '\n') |
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str[ret - 1] = '\0'; |
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*s_copy = str; |
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return 0; |
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} |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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struct gadget_info *gi = to_gadget_info(item); |
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char *udc_name; |
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int ret; |
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|
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mutex_lock(&gi->lock); |
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udc_name = gi->composite.gadget_driver.udc_name; |
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ret = sprintf(page, "%s\n", udc_name ?: ""); |
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mutex_unlock(&gi->lock); |
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|
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return ret; |
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} |
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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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|
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if (!gi->composite.gadget_driver.udc_name) |
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return -ENODEV; |
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|
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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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|
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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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|
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if (strlen(page) < len) |
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return -EOVERFLOW; |
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|
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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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|
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mutex_lock(&gi->lock); |
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|
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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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|
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static ssize_t gadget_dev_desc_max_speed_show(struct config_item *item, |
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char *page) |
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{ |
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enum usb_device_speed speed = to_gadget_info(item)->composite.max_speed; |
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|
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return sprintf(page, "%s\n", usb_speed_string(speed)); |
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} |
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|
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static ssize_t gadget_dev_desc_max_speed_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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|
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mutex_lock(&gi->lock); |
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|
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/* Prevent changing of max_speed after the driver is binded */ |
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if (gi->composite.gadget_driver.udc_name) |
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goto err; |
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|
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if (strncmp(page, "super-speed-plus", 16) == 0) |
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gi->composite.max_speed = USB_SPEED_SUPER_PLUS; |
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else if (strncmp(page, "super-speed", 11) == 0) |
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gi->composite.max_speed = USB_SPEED_SUPER; |
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else if (strncmp(page, "high-speed", 10) == 0) |
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gi->composite.max_speed = USB_SPEED_HIGH; |
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else if (strncmp(page, "full-speed", 10) == 0) |
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gi->composite.max_speed = USB_SPEED_FULL; |
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else if (strncmp(page, "low-speed", 9) == 0) |
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gi->composite.max_speed = USB_SPEED_LOW; |
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else |
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goto err; |
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gi->composite.gadget_driver.max_speed = gi->composite.max_speed; |
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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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mutex_unlock(&gi->lock); |
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return -EINVAL; |
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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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CONFIGFS_ATTR(gadget_dev_desc_, max_speed); |
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|
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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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&gadget_dev_desc_attr_max_speed, |
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NULL, |
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}; |
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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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|
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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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|
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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; |
|
goto out; |
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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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/* 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; |
|
out: |
|
mutex_unlock(&gi->lock); |
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return ret; |
|
} |
|
|
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static void config_usb_cfg_unlink( |
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struct config_item *usb_cfg_ci, |
|
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); |
|
struct usb_composite_dev *cdev = cfg->c.cdev; |
|
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); |
|
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, |
|
}; |
|
|
|
|
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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_reverse(f, tmp, &c->functions, list) { |
|
|
|
list_move(&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 */ |
|
gi->unbind = 0; |
|
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; |
|
unsigned long flags; |
|
|
|
/* the gi->lock is hold by the caller */ |
|
|
|
cdev = get_gadget_data(gadget); |
|
gi = container_of(cdev, struct gadget_info, cdev); |
|
spin_lock_irqsave(&gi->spinlock, flags); |
|
gi->unbind = 1; |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
|
|
kfree(otg_desc[0]); |
|
otg_desc[0] = NULL; |
|
purge_configs_funcs(gi); |
|
composite_dev_cleanup(cdev); |
|
usb_ep_autoconfig_reset(cdev->gadget); |
|
spin_lock_irqsave(&gi->spinlock, flags); |
|
cdev->gadget = NULL; |
|
set_gadget_data(gadget, NULL); |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
} |
|
|
|
static int configfs_composite_setup(struct usb_gadget *gadget, |
|
const struct usb_ctrlrequest *ctrl) |
|
{ |
|
struct usb_composite_dev *cdev; |
|
struct gadget_info *gi; |
|
unsigned long flags; |
|
int ret; |
|
|
|
cdev = get_gadget_data(gadget); |
|
if (!cdev) |
|
return 0; |
|
|
|
gi = container_of(cdev, struct gadget_info, cdev); |
|
spin_lock_irqsave(&gi->spinlock, flags); |
|
cdev = get_gadget_data(gadget); |
|
if (!cdev || gi->unbind) { |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
return 0; |
|
} |
|
|
|
ret = composite_setup(gadget, ctrl); |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
return ret; |
|
} |
|
|
|
static void configfs_composite_disconnect(struct usb_gadget *gadget) |
|
{ |
|
struct usb_composite_dev *cdev; |
|
struct gadget_info *gi; |
|
unsigned long flags; |
|
|
|
cdev = get_gadget_data(gadget); |
|
if (!cdev) |
|
return; |
|
|
|
gi = container_of(cdev, struct gadget_info, cdev); |
|
spin_lock_irqsave(&gi->spinlock, flags); |
|
cdev = get_gadget_data(gadget); |
|
if (!cdev || gi->unbind) { |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
return; |
|
} |
|
|
|
composite_disconnect(gadget); |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
} |
|
|
|
static void configfs_composite_reset(struct usb_gadget *gadget) |
|
{ |
|
struct usb_composite_dev *cdev; |
|
struct gadget_info *gi; |
|
unsigned long flags; |
|
|
|
cdev = get_gadget_data(gadget); |
|
if (!cdev) |
|
return; |
|
|
|
gi = container_of(cdev, struct gadget_info, cdev); |
|
spin_lock_irqsave(&gi->spinlock, flags); |
|
cdev = get_gadget_data(gadget); |
|
if (!cdev || gi->unbind) { |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
return; |
|
} |
|
|
|
composite_reset(gadget); |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
} |
|
|
|
static void configfs_composite_suspend(struct usb_gadget *gadget) |
|
{ |
|
struct usb_composite_dev *cdev; |
|
struct gadget_info *gi; |
|
unsigned long flags; |
|
|
|
cdev = get_gadget_data(gadget); |
|
if (!cdev) |
|
return; |
|
|
|
gi = container_of(cdev, struct gadget_info, cdev); |
|
spin_lock_irqsave(&gi->spinlock, flags); |
|
cdev = get_gadget_data(gadget); |
|
if (!cdev || gi->unbind) { |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
return; |
|
} |
|
|
|
composite_suspend(gadget); |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
} |
|
|
|
static void configfs_composite_resume(struct usb_gadget *gadget) |
|
{ |
|
struct usb_composite_dev *cdev; |
|
struct gadget_info *gi; |
|
unsigned long flags; |
|
|
|
cdev = get_gadget_data(gadget); |
|
if (!cdev) |
|
return; |
|
|
|
gi = container_of(cdev, struct gadget_info, cdev); |
|
spin_lock_irqsave(&gi->spinlock, flags); |
|
cdev = get_gadget_data(gadget); |
|
if (!cdev || gi->unbind) { |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
return; |
|
} |
|
|
|
composite_resume(gadget); |
|
spin_unlock_irqrestore(&gi->spinlock, flags); |
|
} |
|
|
|
static const struct usb_gadget_driver configfs_driver_template = { |
|
.bind = configfs_composite_bind, |
|
.unbind = configfs_composite_unbind, |
|
|
|
.setup = configfs_composite_setup, |
|
.reset = configfs_composite_reset, |
|
.disconnect = configfs_composite_disconnect, |
|
|
|
.suspend = configfs_composite_suspend, |
|
.resume = configfs_composite_resume, |
|
|
|
.max_speed = USB_SPEED_SUPER_PLUS, |
|
.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_PLUS; |
|
|
|
spin_lock_init(&gi->spinlock); |
|
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); |
|
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static void __exit gadget_cfs_exit(void) |
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{ |
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configfs_unregister_subsystem(&gadget_subsys); |
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} |
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module_exit(gadget_cfs_exit);
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