Messages in this thread Patch in this message | | | Date | Sat, 28 Apr 2001 17:02:21 +0200 (MET DST) | From | Andries.Brouwer@cwi ... | Subject | Dane-Elec PhotoMate Combo |
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I just got a Dane-Elec PhotoMate Combo SmartMedia/CompactFlash reader manufactured by SCM Microsystems. It is a USB device with ID 04e6:0005.
The http://www.qbik.ch/usb/devices/ list of supported devices calls this thing unsupported, and mailhot@enst.fr writes: "I want this to work ! I'll help testing."
I think the status can be changed to fully supported, at least it works fine in my first tests.
Changes required: (i) in sd.c there is a peculiar code fragment that assumes that a removable disk is write protected in case the status is unknown; reversing this default allows writing to the flash card.
if (the_result) { - printk("%s: test WP failed, assume Write Protected\n", nbuff); - rscsi_disks[i].write_prot = 1; + printk("%s: test WP failed, assume Write Enabled\n", nbuff); } else { rscsi_disks[i].write_prot = ((buffer[2] & 0x80) != 0);
(ii) this card needs usb/storage/dpcm.c which is compiled when CONFIG_USB_STORAGE_DPCM is set, but this variable is missing from usb/Config.in. Add it.
(iii) add to unusual_devs.h:
diff -u --recursive --new-file ../linux-2.4.3/linux/drivers/usb/storage/unusual_devs.h ./l\ inux/drivers/usb/storage/unusual_devs.h --- ../linux-2.4.3/linux/drivers/usb/storage/unusual_devs.h Sun Apr 1 20:44:19 2001 +++ ./linux/drivers/usb/storage/unusual_devs.h Sat Apr 28 14:39:20 2001 @@ -79,6 +79,12 @@ "CameraMate (DPCM_USB)", US_SC_SCSI, US_PR_DPCM_USB, NULL, US_FL_START_STOP ), + +UNUSUAL_DEV( 0x04e6, 0x0005, 0x0100, 0x0208, + "SCM Microsystems Inc", + "eUSB SmartMedia / CompactFlash Adapter", + US_SC_SCSI, US_PR_DPCM_USB, NULL, + US_FL_START_STOP ), #endif
Maybe the device is slow, and I got read errors with a Compact Flash card in the reader at boot time. A "blockdev --rereadpt /dev/sdX" worked. Andries
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