diff options
Diffstat (limited to 'include/linux/usb/composite.h')
| -rw-r--r-- | include/linux/usb/composite.h | 97 |
1 files changed, 75 insertions, 22 deletions
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index 9d8c3b634493..f8dda0621800 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -34,6 +34,8 @@ * the composite model the host can use both functions at the same time. */ +#include <linux/bcd.h> +#include <linux/version.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> @@ -46,6 +48,9 @@ */ #define USB_GADGET_DELAYED_STATUS 0x7fff /* Impossibly large value */ +/* big enough to hold our biggest descriptor */ +#define USB_COMP_EP0_BUFSIZ 1024 + struct usb_configuration; /** @@ -245,24 +250,31 @@ int usb_add_config(struct usb_composite_dev *, void usb_remove_config(struct usb_composite_dev *, struct usb_configuration *); +/* predefined index for usb_composite_driver */ +enum { + USB_GADGET_MANUFACTURER_IDX = 0, + USB_GADGET_PRODUCT_IDX, + USB_GADGET_SERIAL_IDX, + USB_GADGET_FIRST_AVAIL_IDX, +}; + /** * struct usb_composite_driver - groups configurations into a gadget * @name: For diagnostics, identifies the driver. - * @iProduct: Used as iProduct override if @dev->iProduct is not set. - * If NULL value of @name is taken. - * @iManufacturer: Used as iManufacturer override if @dev->iManufacturer is - * not set. If NULL a default "<system> <release> with <udc>" value - * will be used. - * @iSerialNumber: Used as iSerialNumber override if @dev->iSerialNumber is - * not set. * @dev: Template descriptor for the device, including default device * identifiers. - * @strings: tables of strings, keyed by identifiers assigned during bind() - * and language IDs provided in control requests + * @strings: tables of strings, keyed by identifiers assigned during @bind + * and language IDs provided in control requests. Note: The first entries + * are predefined. The first entry that may be used is + * USB_GADGET_FIRST_AVAIL_IDX * @max_speed: Highest speed the driver supports. * @needs_serial: set to 1 if the gadget needs userspace to provide * a serial number. If one is not provided, warning will be printed. - * @unbind: Reverses bind; called as a side effect of unregistering + * @bind: (REQUIRED) Used to allocate resources that are shared across the + * whole device, such as string IDs, and add its configurations using + * @usb_add_config(). This may fail by returning a negative errno + * value; it should return zero on successful initialization. + * @unbind: Reverses @bind; called as a side effect of unregistering * this driver. * @disconnect: optional driver disconnect method * @suspend: Notifies when the host stops sending USB traffic, @@ -271,9 +283,9 @@ void usb_remove_config(struct usb_composite_dev *, * before function notifications * * Devices default to reporting self powered operation. Devices which rely - * on bus powered operation should report this in their @bind() method. + * on bus powered operation should report this in their @bind method. * - * Before returning from bind, various fields in the template descriptor + * Before returning from @bind, various fields in the template descriptor * may be overridden. These include the idVendor/idProduct/bcdDevice values * normally to bind the appropriate host side driver, and the three strings * (iManufacturer, iProduct, iSerialNumber) normally used to provide user @@ -283,14 +295,12 @@ void usb_remove_config(struct usb_composite_dev *, */ struct usb_composite_driver { const char *name; - const char *iProduct; - const char *iManufacturer; - const char *iSerialNumber; const struct usb_device_descriptor *dev; struct usb_gadget_strings **strings; enum usb_device_speed max_speed; unsigned needs_serial:1; + int (*bind)(struct usb_composite_dev *cdev); int (*unbind)(struct usb_composite_dev *); void (*disconnect)(struct usb_composite_dev *); @@ -298,10 +308,10 @@ struct usb_composite_driver { /* global suspend hooks */ void (*suspend)(struct usb_composite_dev *); void (*resume)(struct usb_composite_dev *); + struct usb_gadget_driver gadget_driver; }; -extern int usb_composite_probe(struct usb_composite_driver *driver, - int (*bind)(struct usb_composite_dev *cdev)); +extern int usb_composite_probe(struct usb_composite_driver *driver); extern void usb_composite_unregister(struct usb_composite_driver *driver); extern void usb_composite_setup_continue(struct usb_composite_dev *cdev); @@ -310,7 +320,6 @@ extern void usb_composite_setup_continue(struct usb_composite_dev *cdev); * struct usb_composite_device - represents one composite usb gadget * @gadget: read-only, abstracts the gadget's usb peripheral controller * @req: used for control responses; buffer is pre-allocated - * @bufsiz: size of buffer pre-allocated in @req * @config: the currently active configuration * * One of these devices is allocated and initialized before the @@ -341,7 +350,6 @@ extern void usb_composite_setup_continue(struct usb_composite_dev *cdev); struct usb_composite_dev { struct usb_gadget *gadget; struct usb_request *req; - unsigned bufsiz; struct usb_configuration *config; @@ -352,9 +360,7 @@ struct usb_composite_dev { struct list_head configs; struct usb_composite_driver *driver; u8 next_string_id; - u8 manufacturer_override; - u8 product_override; - u8 serial_override; + char *def_manufacturer; /* the gadget driver won't enable the data pullup * while the deactivation count is nonzero. @@ -375,6 +381,53 @@ extern int usb_string_ids_tab(struct usb_composite_dev *c, struct usb_string *str); extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n); +/* + * Some systems will need runtime overrides for the product identifiers + * published in the device descriptor, either numbers or strings or both. + * String parameters are in UTF-8 (superset of ASCII's 7 bit characters). + */ +struct usb_composite_overwrite { + u16 idVendor; + u16 idProduct; + u16 bcdDevice; + char *serial_number; + char *manufacturer; + char *product; +}; +#define USB_GADGET_COMPOSITE_OPTIONS() \ + static struct usb_composite_overwrite coverwrite; \ + \ + module_param_named(idVendor, coverwrite.idVendor, ushort, S_IRUGO); \ + MODULE_PARM_DESC(idVendor, "USB Vendor ID"); \ + \ + module_param_named(idProduct, coverwrite.idProduct, ushort, S_IRUGO); \ + MODULE_PARM_DESC(idProduct, "USB Product ID"); \ + \ + module_param_named(bcdDevice, coverwrite.bcdDevice, ushort, S_IRUGO); \ + MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); \ + \ + module_param_named(iSerialNumber, coverwrite.serial_number, charp, \ + S_IRUGO); \ + MODULE_PARM_DESC(iSerialNumber, "SerialNumber string"); \ + \ + module_param_named(iManufacturer, coverwrite.manufacturer, charp, \ + S_IRUGO); \ + MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); \ + \ + module_param_named(iProduct, coverwrite.product, charp, S_IRUGO); \ + MODULE_PARM_DESC(iProduct, "USB Product string") + +void usb_composite_overwrite_options(struct usb_composite_dev *cdev, + struct usb_composite_overwrite *covr); + +static inline u16 get_default_bcdDevice(void) +{ + u16 bcdDevice; + + bcdDevice = bin2bcd((LINUX_VERSION_CODE >> 16 & 0xff)) << 8; + bcdDevice |= bin2bcd((LINUX_VERSION_CODE >> 8 & 0xff)); + return bcdDevice; +} /* messaging utils */ #define DBG(d, fmt, args...) \ |