Hi, I'm trying to port the imxrt SD Card driver (imxrt_usdhc.c) to the sama5d27. Both chips appear to use similar Cadence IP blocks... the registers appear to be almost identical. I know the SDMMC peripheral and the SD Card both work since I can boot from it using U-Boot on the SAMA5D2-XULT board.
I have the driver compiling and I can get SDMMC peripheral reset and the clock started and stabilized. (I think.) However, I can't seem to receive command responses from the SD Card... I just receive timeouts. See below for some debug logging. Source code is here on this branch <https://github.com/starcat-io/incubator-nuttx/tree/feature/sama5d27-sdmmc-support>. Here's the sam_sdmmc.c driver file, which corresponds to the imxrt_usdhc.c file. Does anyone have any tips about how to debug this driver? Did anyone do a port of this driver? If so how did you debug it or get it working? I know the Sony cxd5602 and imxrt family both use this driver. cheers adam -- Adam Feuer <a...@adamfeuer.com> [ 0.000000] sam_rng_initialize: Initializing TRNG hardware [ 3.450000] nsh_main: custinfo: Entry [ 3.450000] nsh_main: mcinfo: Entry [ 3.460000] nsh_initialize: Entry [ 3.460000] nsh_initialize: about to mount romfs [ 3.470000] board_app_initialize: custinfo: Here 0.1 [ 3.470000] board_app_initialize: mcinfo: Here 0.2 [ 3.480000] sam_sdmmc_initialize: Entry. [ 3.480000] sam_sdmmc_sdio_initialize: sdio init [ 3.490000] sam_reset: Reset complete [ 3.490000] sam_clock: DISABLED, SYSCTRL: 00000000 [ 3.500000] sam_reset: SYSCTL: 00000000 PRSSTAT: 01ff0000 IRQSTATEN: 117f01ff [ 3.500000] sam_dumpsample: SDMMC Registers: After reset [ 3.510000] sam_dumpsample: DSADDR[00000000]: 0000040e [ 3.520000] sam_dumpsample: BLKATTR[00000004]: 0010040e [ 3.520000] sam_dumpsample: CMDARG[00000008]: 0020040e [ 3.530000] sam_dumpsample: XFERTY[0000000c]: 00300416 [ 3.530000] sam_dumpsample: CMDRSP0[00000010]: 00400416 [ 3.540000] sam_dumpsample: CMDRSP1[00000014]: 00500416 [ 3.550000] sam_dumpsample: CMDRSP2[00000018]: 00600416 [ 3.550000] sam_dumpsample: CMDRSP3[0000001c]: 00700416 [ 3.560000] sam_dumpsample: PRSSTAT[00000024]: 00000000 [ 3.560000] sam_dumpsample: PROCTL[00000028]: 00000000 [ 3.570000] sam_dumpsample: SYSCTL[0000002c]: 00000000 [ 3.580000] sam_dumpsample: IRQSTAT[00000030]: 00000000 [ 3.580000] sam_dumpsample: IRQSTATEN[00000034]: 00000000 [ 3.590000] sam_dumpsample: IRQSIGEN[00000038]: 00000000 [ 3.590000] sam_dumpsample: AC12ERR[0000003c]: 00000000 [ 3.600000] sam_dumpsample: HTCAPBLT[00000040]: 00000000 [ 3.600000] sam_dumpsample: WML[00000044]: 00000000 [ 3.610000] sam_dumpsample: ADMAES[00000054]: 00000000 [ 3.620000] sam_dumpsample: ADSADDR[00000058]: 00000000 [ 3.620000] sam_dumpsample: VENDOR[000000c0]: 00000000 [ 3.630000] sam_dumpsample: MMCBOOT[000000c4]: 00000000 [ 3.630000] sam_sdmmc_sdio_initialize: sdio init complete [ 3.640000] mmcsd_slotinitialize: minor: 0 [ 3.640000] mmcsd_slotinitialize: in mmcd_slotinitnitialize [ 3.650000] mmcsd_slotinitialize: about to mmcd_hwinitialize [ 3.660000] mmcsd_hwinitialize: in mmcsd_hwinitialize [ 3.660000] mmcsd_hwinitialize: DMA supported: 0 [ 3.670000] mmcsd_hwinitialize: Attached MMC/SD interrupts [ 3.670000] sam_registercallback: Register 0x2007374c(0x200ad880) [ 3.680000] sam_status: cdstatus=01 [ 3.680000] mmcsd_probe: type: 0 probed: 0 [ 3.690000] sam_status: cdstatus=01 [ 3.690000] mmcsd_removed: type: 0 present: 1 [ 3.700000] sam_clock: DISABLED, SYSCTRL: 00000000 [ 3.700000] sam_status: cdstatus=01 [ 3.710000] sam_status: cdstatus=01 [ 3.710000] sam_clock: IDMODE [ 3.730000] sam_clock: Waiting for SDMMC clock to stablize. [ 3.730000] sam_clock: SYSCTRL: 00008003 [ 3.740000] mmcsd_cardidentify: About to mmcsd_sendcmdpoll 1... [ 3.740000] sam_sendcmd: in sendcmd[ 3.750000] sam_sendcmd: cmd: 00000000 arg: 00000000 regval: 00000000 mcrval: 80000000 [ 3.750000] sam_sendcmd: sendcmd complete. [ 3.860000] sam_waitresponse: ERROR: Timeout cmd: 00000000 IRQSTAT: 00000000 [ 3.860000] mmcsd_sendcmdpoll: ERROR: Wait for response to cmd: 00000000 failed: -116 [ 3.870000] mmcsd_cardidentify: About to mmcsd_sendcmdpoll 2... [ 3.880000] sam_sendcmd: in sendcmd[ 3.880000] sam_sendcmd: cmd: 00000000 arg: 00000000 regval: 00000000 mcrval: 80000000 [ 3.990000] sam_sendcmd: ERROR: Timeout (waiting CIHB) cmd: 00000000 PRSSTAT: 01ff0001
