1*8369ae33SRafał MiłeckiBroadcom introduced new bus as replacement for older SSB. It is based on AMBA, 2*8369ae33SRafał Miłeckihowever from programming point of view there is nothing AMBA specific we use. 3*8369ae33SRafał Miłecki 4*8369ae33SRafał MiłeckiStandard AMBA drivers are platform specific, have hardcoded addresses and use 5*8369ae33SRafał MiłeckiAMBA standard fields like CID and PID. 6*8369ae33SRafał Miłecki 7*8369ae33SRafał MiłeckiIn case of Broadcom's cards every device consists of: 8*8369ae33SRafał Miłecki1) Broadcom specific AMBA device. It is put on AMBA bus, but can not be treated 9*8369ae33SRafał Miłecki as standard AMBA device. Reading it's CID or PID can cause machine lockup. 10*8369ae33SRafał Miłecki2) AMBA standard devices called ports or wrappers. They have CIDs (AMBA_CID) 11*8369ae33SRafał Miłecki and PIDs (0x103BB369), but we do not use that info for anything. One of that 12*8369ae33SRafał Miłecki devices is used for managing Broadcom specific core. 13*8369ae33SRafał Miłecki 14*8369ae33SRafał MiłeckiAddresses of AMBA devices are not hardcoded in driver and have to be read from 15*8369ae33SRafał MiłeckiEPROM. 16*8369ae33SRafał Miłecki 17*8369ae33SRafał MiłeckiIn this situation we decided to introduce separated bus. It can contain up to 18*8369ae33SRafał Miłecki16 devices identified by Broadcom specific fields: manufacturer, id, revision 19*8369ae33SRafał Miłeckiand class. 20