1f9d0fd8aSSam Protsenko# 2f9d0fd8aSSam Protsenko# USB Gadget support on a system involves 3f9d0fd8aSSam Protsenko# (a) a peripheral controller, and 4f9d0fd8aSSam Protsenko# (b) the gadget driver using it. 5f9d0fd8aSSam Protsenko# 6f9d0fd8aSSam Protsenko# NOTE: Gadget support ** DOES NOT ** depend on host-side CONFIG_USB !! 7f9d0fd8aSSam Protsenko# 8f9d0fd8aSSam Protsenko# - Host systems (like PCs) need CONFIG_USB (with "A" jacks). 9f9d0fd8aSSam Protsenko# - Peripherals (like PDAs) need CONFIG_USB_GADGET (with "B" jacks). 10f9d0fd8aSSam Protsenko# - Some systems have both kinds of controllers. 11f9d0fd8aSSam Protsenko# 12f9d0fd8aSSam Protsenko# With help from a special transceiver and a "Mini-AB" jack, systems with 13f9d0fd8aSSam Protsenko# both kinds of controller can also support "USB On-the-Go" (CONFIG_USB_OTG). 14f9d0fd8aSSam Protsenko# 15f9d0fd8aSSam Protsenko 16f9d0fd8aSSam Protsenkomenuconfig USB_GADGET 17f9d0fd8aSSam Protsenko bool "USB Gadget Support" 18f9d0fd8aSSam Protsenko help 19f9d0fd8aSSam Protsenko USB is a master/slave protocol, organized with one master 20f9d0fd8aSSam Protsenko host (such as a PC) controlling up to 127 peripheral devices. 21f9d0fd8aSSam Protsenko The USB hardware is asymmetric, which makes it easier to set up: 22f9d0fd8aSSam Protsenko you can't connect a "to-the-host" connector to a peripheral. 23f9d0fd8aSSam Protsenko 24f9d0fd8aSSam Protsenko U-Boot can run in the host, or in the peripheral. In both cases 25f9d0fd8aSSam Protsenko you need a low level bus controller driver, and some software 26f9d0fd8aSSam Protsenko talking to it. Peripheral controllers are often discrete silicon, 27f9d0fd8aSSam Protsenko or are integrated with the CPU in a microcontroller. The more 28f9d0fd8aSSam Protsenko familiar host side controllers have names like "EHCI", "OHCI", 29f9d0fd8aSSam Protsenko or "UHCI", and are usually integrated into southbridges on PC 30f9d0fd8aSSam Protsenko motherboards. 31f9d0fd8aSSam Protsenko 32f9d0fd8aSSam Protsenko Enable this configuration option if you want to run U-Boot inside 33f9d0fd8aSSam Protsenko a USB peripheral device. Configure one hardware driver for your 34f9d0fd8aSSam Protsenko peripheral/device side bus controller, and a "gadget driver" for 35f9d0fd8aSSam Protsenko your peripheral protocol. 36a59a77f8SSam Protsenko 37a59a77f8SSam Protsenkoif USB_GADGET 38a59a77f8SSam Protsenko 39*3457bbafSSam Protsenkoconfig USB_GADGET_ATMEL_USBA 40*3457bbafSSam Protsenko bool "Atmel USBA" 41*3457bbafSSam Protsenko select USB_GADGET_DUALSPEED 42*3457bbafSSam Protsenko help 43*3457bbafSSam Protsenko USBA is the integrated high-speed USB Device controller on 44*3457bbafSSam Protsenko the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel. 45*3457bbafSSam Protsenko 46*3457bbafSSam Protsenkoconfig USB_GADGET_DWC2_OTG 47*3457bbafSSam Protsenko bool "DesignWare USB2.0 HS OTG controller (gadget mode)" 48*3457bbafSSam Protsenko select USB_GADGET_DUALSPEED 49*3457bbafSSam Protsenko help 50*3457bbafSSam Protsenko The Designware USB2.0 high-speed gadget controller 51*3457bbafSSam Protsenko integrated into many SoCs. Select this option if you want the 52*3457bbafSSam Protsenko driver to operate in Peripheral mode. This option requires 53*3457bbafSSam Protsenko USB_GADGET to be enabled. 54*3457bbafSSam Protsenko 55*3457bbafSSam Protsenkoconfig CI_UDC 56*3457bbafSSam Protsenko bool "ChipIdea device controller" 57*3457bbafSSam Protsenko select USB_GADGET_DUALSPEED 58*3457bbafSSam Protsenko help 59*3457bbafSSam Protsenko Say Y here to enable device controller functionality of the 60*3457bbafSSam Protsenko ChipIdea driver. 61*3457bbafSSam Protsenko 62a59a77f8SSam Protsenkoconfig USB_GADGET_VBUS_DRAW 63a59a77f8SSam Protsenko int "Maximum VBUS Power usage (2-500 mA)" 64a59a77f8SSam Protsenko range 2 500 65a59a77f8SSam Protsenko default 2 66a59a77f8SSam Protsenko help 67a59a77f8SSam Protsenko Some devices need to draw power from USB when they are 68a59a77f8SSam Protsenko configured, perhaps to operate circuitry or to recharge 69a59a77f8SSam Protsenko batteries. This is in addition to any local power supply, 70a59a77f8SSam Protsenko such as an AC adapter or batteries. 71a59a77f8SSam Protsenko 72a59a77f8SSam Protsenko Enter the maximum power your device draws through USB, in 73a59a77f8SSam Protsenko milliAmperes. The permitted range of values is 2 - 500 mA; 74a59a77f8SSam Protsenko 0 mA would be legal, but can make some hosts misbehave. 75a59a77f8SSam Protsenko 76a59a77f8SSam Protsenko This value will be used except for system-specific gadget 77a59a77f8SSam Protsenko drivers that have more specific information. 78a59a77f8SSam Protsenko 79*3457bbafSSam Protsenko# Selected by UDC drivers that support high-speed operation. 80*3457bbafSSam Protsenkoconfig USB_GADGET_DUALSPEED 81*3457bbafSSam Protsenko bool 82*3457bbafSSam Protsenko 83a59a77f8SSam Protsenkoendif # USB_GADGET 84