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- Notes on the the generic USB-OHCI driver
- ========================================
- This driver (drivers/usb_ohci.[ch]) is the result of the merge of
- various existing OHCI drivers that were basically identical beside
- cpu/board dependant initalization. This initalization has been moved
- into cpu/board directories and are called via the hooks below.
- Configuration options
- ----------------------
- CONFIG_USB_OHCI_NEW: enable the new OHCI driver
- CFG_USB_OHCI_BOARD_INIT: call the board dependant hooks:
- - extern int usb_board_init(void);
- - extern int usb_board_stop(void);
- - extern int usb_cpu_init_fail(void);
- CFG_USB_OHCI_CPU_INIT: call the cpu dependant hooks:
- - extern int usb_cpu_init(void);
- - extern int usb_cpu_stop(void);
- - extern int usb_cpu_init_fail(void);
- CFG_USB_OHCI_REGS_BASE: defines the base address of the OHCI
- registers
- CFG_USB_OHCI_SLOT_NAME: slot name
- CFG_USB_OHCI_MAX_ROOT_PORTS: maximal number of ports of the
- root hub.
- Endianness issues
- ------------------
- The USB bus operates in little endian, but unfortunately there are
- OHCI controllers that operate in big endian such as ppc4xx and
- mpc5xxx. For these the config option
- CFG_OHCI_BE_CONTROLLER
- needs to be defined.
- PCI Controllers
- ----------------
- You'll need to define
- CONFIG_PCI_OHCI
- PCI Controllers need to do byte swapping on register accesses, so they
- should to define:
- CFG_OHCI_SWAP_REG_ACCESS
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