1
Notes on the the generic USB-OHCI driver
2
========================================
4
This driver (drivers/usb/usb_ohci.[ch]) is the result of the merge of
5
various existing OHCI drivers that were basically identical beside
6
cpu/board dependant initalization. This initalization has been moved
7
into cpu/board directories and are called via the hooks below.
10
----------------------
12
CONFIG_USB_OHCI_NEW: enable the new OHCI driver
14
CONFIG_SYS_USB_OHCI_BOARD_INIT: call the board dependant hooks:
16
- extern int usb_board_init(void);
17
- extern int usb_board_stop(void);
18
- extern int usb_cpu_init_fail(void);
20
CONFIG_SYS_USB_OHCI_CPU_INIT: call the cpu dependant hooks:
22
- extern int usb_cpu_init(void);
23
- extern int usb_cpu_stop(void);
24
- extern int usb_cpu_init_fail(void);
26
CONFIG_SYS_USB_OHCI_REGS_BASE: defines the base address of the OHCI
29
CONFIG_SYS_USB_OHCI_SLOT_NAME: slot name
31
CONFIG_SYS_USB_OHCI_MAX_ROOT_PORTS: maximal number of ports of the
38
The USB bus operates in little endian, but unfortunately there are
39
OHCI controllers that operate in big endian such as ppc4xx and
40
mpc5xxx. For these the config option
42
CONFIG_SYS_OHCI_BE_CONTROLLER
54
If you have several USB PCI controllers, define
56
CONFIG_PCI_OHCI_DEVNO: number of the OHCI device in PCI list
58
If undefined, the first instance found in PCI space will be used.
60
PCI Controllers need to do byte swapping on register accesses, so they
63
CONFIG_SYS_OHCI_SWAP_REG_ACCESS