On 7 March 2015 at 18:39, Rafał Miłecki <zajec5@xxxxxxxxx> wrote: > It seems that brcmnand_ctlrdy_irq never fires on my device. Just like > controller was never generating any IRQ. > > > I started comparing your driver with OpenWrt's bcm_nand.c (which > should be very similar to Broadcom's SDK NAND driver for ARM). Below > are few things I've noticed. > > 1) In bcm_nand.c IRQ handler also doesn't seem to be fired (or very rarely). Oh, wait, I was wrong there. So in bcm_nand.c IRQ handler fires very often, just not during the early phase (RESET, READID), when we don't use IRQs. During standard read/program/etc IRQ is commonly used. So maybe all we're missing in case of brcmstb_nand.c is enabling/acking/disabling IRQ? It seem that my controller 6.01 has: 1) Following IRQs: DIREC_READ_MISS ERASE_COMPLETE COPYBACK_COMPLETE PROGRAM_COMPLETE CONTROLLER_RDY RDBSY_RDY ECC_UNCORRECTABLE ECC_CORRECTABLE 2) Registers for reading/acking above IRQs: 0xf00 DIREC_READ_MISS 0xf04 ERASE_COMPLETE 0xf08 COPYBACK_COMPLETE 0xf0c PROGRAM_COMPLETE 0xf10 CONTROLLER_RDY 0xf14 RDBSY_RDY 0xf18 ECC_UNCORRECTABLE 0xf1c ECC_CORRECTABLE (if 0x1 is set, it means IRQ was raised, writing 0x1 ack-es it) 3) Register 0x408 for enabling/disabling IRQs: 0x00000004 DIREC_READ_MISS 0x00000008 ERASE_COMPLETE 0x00000010 COPYBACK_COMPLETE 0x00000020 PROGRAM_COMPLETE 0x00000040 CONTROLLER_RDY 0x00000080 RDBSY_RDY 0x00000100 ECC_UNCORRECTABLE 0x00000200 ECC_CORRECTABLE -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
