about pxa255 pcmcia+ide

[sinkin]

Hello!
I want to support 2.5'' ide disk on my pxa255 board through pcmcia bus.
because pxa don't have a dma channel for pcmcia, and i don't want to add
a externel FPGA/CPLD to get a external dma controller for ide disk, so i
want to use a pxa255's internel dma channel for transfering data between
memory and pcmcia's data bus, and cut down the cpu's loadding when
transfer data from or to ide disk.
I don't know if this scheme can work well, maybe can you give me some
suggestion? Thanks!