Dear Schleifer, Alexander,
Thanks for your reply...
The CID part is: mmc: response: 1a50514d 53202020 1018301a ec007b8b Manufacturer ID: 1A OEM/Application ID: 5051 Product name: MS Product Revision: 1.0 Product Serial Number: 405805804 Manufacturing Date: 07/11
The CSD part is: mmc: response: 005e0032 5f5983cf edb6ff87 9640003f raw CSD data: 005e0032 5f5983cf edb6ff87 9640003f Read block length: 512 (Supports partial reads) Card capacity: 244 Mbytes Warning: Using maximum data timeout mmc: Using 983040 cycles data timeout (DTOR=0x7f)
I miss the clock messages here. Whats the MCK and which divider is calculated?
mmc: bread failed, status = 0040c0e5, card status = 00000900
0040c0e5= DTOE=1(data time out error) TXBUFE=1 RXBUFF=1(rx buffer full) and other bits
That seems to me like some timing problem, or a hardware problem, where reading data with slow clock (used to get CID/CSD) works, but reading at several MHz (depending on card) does not work. Besides the clock calculation in this driver rounds the divider down, so on a typical system a 25MHz card will receive a 48 MHz clock instead of a 24 MHz. I figured this out while testing the new driver...
If you really want to bother with this now old driver use this excerpt from the new driver:
debug("mci: bus_hz is %u, setting clock %u Hz, block size %u\n", bus_hz, hz, blklen); if (hz > 0) { /* find lowest clkdiv yielding a rate <= than requested */ for (clkdiv=0; clkdiv<255; clkdiv++) { if ((bus_hz / (clkdiv+1) / 2) <= hz) break; } } printf("mci: setting clock %u Hz, block size %u\n", (bus_hz / (clkdiv+1)) / 2, blklen);
If you have two days patience, wait for the new driver, I will be most happy to have a tester ;)
Best Regards, Reinhard