readme.bfin

usb isp1761驱动源代码 可编进内核。

------------------------------------------------------------------------------
 ISP176x driver (version 2.0.0.0-bfin) for Linux-2.6.19.2
------------------------------------------------------------------------------

This driver for the ISP1760/ISP1761 on a Blackfin Processor is adapted from 
- Bernard Blackham抯 [e-mail] Gumstix port and from 
version 2.0.0.0 of the ISP176x host driver released by Philips 
at http://sourceforge.net/projects/isp176x-hcd

Changes from Bernard抯 original driver essentially involve:

 - porting to Linux 2.6.19

Changes:
1) Removed references to struct pt_regs *regs form all structs, functions and calls.
2) Changed (struct hcd_dev *)urb->dev->bus->hcpriv to (struct hcd_dev *) bus_to_hcd(urb->dev->bus)
3) Fixed various warnings
4) Added support for Blackfin Processors

The driver has been tested on has the ISP1761 and ISP1760 wired up as follows:
 - 16-bit data bus
 - 17-bits of address lines straight through
 - /CS = f(AMS3, A19, A18)
 - /WE to /AWE
 - /RD to /ARE

The bfin-isp1761 module must be loaded before pehci, else the pehci module
will not load.

Porting to your board will involve editing bfin-isp1761.c to find the correct
chip select lines, IRQ lines, and memory regions. 

#define ISP1761_BASE       0x203C0000
#define ISP1761_IRQ        IRQ_PF7

A 32-bit data bus will also require some changes to the mode register setting 
(set upon reset) in pehci.c and hal_pxa.c.

Isochronous support seems to work.

This driver only supports 3 HOST ports