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| Trying to get SD/MMC working on AT91SAM9XE(9260) http://www.at91.com/samphpbb/viewtopic.php?f=12&t=19627 |
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| Author: | reinhardm [ Tue Oct 12, 2010 8:48 pm ] |
| Post subject: | Trying to get SD/MMC working on AT91SAM9XE(9260) |
Hello, I am trying to get SD or MMC running with top of tree kernel (2.6.35.rc7). I have defined: CONFIG_MMC=y CONFIG_MMC_BLOCK=y CONFIG_MMC_BLOCK_BOUNCE=y CONFIG_MMC_AT91=y also in the board-top9000: static struct at91_mmc_data __initdata top9000_mmc_data = { .slot_b = 0, .wire4 = 1, .det_pin = AT91_PIN_PC9, }; - also - /* MMC */ at91_add_device_mmc(0, &top9000_mmc_data); However there are no kernel messages whatsoever about detecting a card. It is worth mentioning that all sorts of cards actually do work under u-boot - so the hardware should be wired ok. And yes, the card is connected to the "A" slot pins. I also had commented out the .det_pin and had the card inserted during kernel boot. Also important mentioning is that USB sticks are well detected and the partitions are displayed and mountable - that means that partition support and FAT filesystems are properly compiled into the kernel. My questions are: 1. should TOT kernel work or are still some older patches required? 2. are there any special processes required to detect a card? 3. are there any other prerequisites necessary to initialize the MCI hardware beyond what is done by "at91_add_device_mmc" ? (I added some kprintf's to at91sam9260_devices.c and the "Slot A" part is really executed) Maybe someone has ideas where I should additionally look at to solve the puzzle..? Thanks in advance, Reinhard |
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