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SubjectRe: Experimental driver for Ricoh Bay1Controller SD Card readers
Sascha Sommer wrote:
> Hi,
> Attached is a very experimental driver for a Ricoh SD Card reader that can be
> found in some notebooks like the Samsung P35.
> Whenever a sd card is inserted into one of these notebooks, a virtual pcmcia
> card will show up:
> Socket 0:
> product info: "RICOH", "Bay1Controller", "", ""
> manfid: 0x0000, 0x0000
> In order to write this driver I hacked qemu to have access to the cardbus
> bridge containing this card. I then logged the register accesses of the
> windows xp driver and tryed to analyse them.
> As the meanings of most of the register are still unknown to me, I consider
> this driver very experimental. It is possible that this driver might destroy
> your data or your hardware. Use at your own risk!
> Other problems:
> - I only implemented reading support
> - I only tested with a 128 MB SD card, no idea what would be needed to support
> other card types
> - irqs are not supported
> - dma is not supported
> - it is very slow
> - the registers can be found on the cardbus bridge and not on the virtual
> pcmcia card. The cardbus bridge is already claimed by yenta_socket.
> Therefore the driver currently uses pci_find_device to find the cardbus

- pci_find_device is no go today. Use pci_get_device (+ pci_dev_get, _put).
- ioremap->pci_iomap
- iobase should be __iomem.
- codingstyle (char* buffer, for(loop, if(data){, ...)

-- Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8 22A0 32CC 55C3 39D4 7A7E
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