Debugging shows CMD52 is sent from sdio_reset call in mmc_rescan_try_fteq. card does not exist at this time. I can make this a formal patch once others are happy that this is the answer. Philip diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 6625c05..39e8da0 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1495,7 +1495,9 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) mmc_hostname(host), __func__, host->f_init); #endif mmc_power_up(host); - sdio_reset(host); + + if (host->card) + sdio_reset(host); mmc_go_idle(host); mmc_send_if_cond(host, host->ocr_avail); On Feb 4, 2011, at 2:53 PM, Philip Rakity wrote: > using mmc-next -- NO changes -- last checkin was from linux Jan 26 > > > [ 1.881003] mmc0: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 21 width 0 timing 0 > [ 1.902580] NET: Registered protocol family 17 > [ 1.916121] Registering the dns_resolver key type > [ 1.930357] VFP support v0.3: > [ 1.939016] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0 > [ 1.962417] implementor 56 architecture 2 part 20 variant 9 rev 5 > [ 1.980607] ThumbEE CPU extension supported. > [ 1.993589] PJ4 iWMMXt coprocessor enabled. > [ 2.008449] max8925-rtc max8925-rtc: setting system clock to 2007-02-05 00:51:33 UTC (1170636693) > [ 2.034998] mmc0: starting CMD52 arg 00000c00 flags 00000195 > [ 2.052704] Waiting 15sec before mounting root device... > [ 2.068948] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000 > [ 2.087707] mmc0: req done (CMD52): -110: 00000000 00000000 00000000 00000000 > [ 2.109069] mmc0: starting CMD52 arg 80000c08 flags 00000195 > [ 2.126291] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000 > [ 2.145002] mmc0: req done (CMD52): -110: 00000000 00000000 00000000 00000000 > [ 2.166321] mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 21 width 0 timing 0 > > > longer log > > [ 0.000000] Linux version 2.6.38-rc2-22248-g6663050-dirty (philip@philip-laptop) (gcc version 4.2.0 20070413 (prerelease) (CodeSourcery 2007q1 > [ 0.000000] CPU: ARMv7 Processor [560f5815] revision 5 (ARMv7), cr=10c53c7f > [ 0.000000] CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache > [ 0.000000] Machine: Brownstone Development Platform > [ 0.000000] Ignoring unrecognised tag 0x41000403 > [ 0.000000] Memory policy: ECC disabled, Data cache writeback > [ 0.000000] On node 0 totalpages: 131072 > [ 0.000000] free_area_init_node: node 0, pgdat c03771c8, node_mem_map c0396000 > [ 0.000000] Normal zone: 1024 pages used for memmap > [ 0.000000] Normal zone: 0 pages reserved > [ 0.000000] Normal zone: 130048 pages, LIFO batch:31 > [ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 > [ 0.000000] pcpu-alloc: [0] 0 > [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048 > [ 0.000000] Kernel command line: debug rootdelay=15 root=/dev/mmcblk0p1 rootfstype=ext3 console=ttyS2,38400 mem=512M uart_dma mbr_offset=0x48 > [ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes) > [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) > [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) > [ 0.000000] Memory: 512MB = 512MB total > [ 0.000000] Memory: 516084k/516084k available, 8204k reserved, 0K highmem > [ 0.000000] Virtual kernel memory layout: > [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) > [ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) > [ 0.000000] DMA : 0xffc00000 - 0xffe00000 ( 2 MB) > [ 0.000000] vmalloc : 0xe0800000 - 0xfe000000 ( 472 MB) > [ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) > [ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB) > [ 0.000000] .init : 0xc0008000 - 0xc001f000 ( 92 kB) > [ 0.000000] .text : 0xc001f000 - 0xc035b0f0 (3313 kB) > [ 0.000000] .data : 0xc035c000 - 0xc03789e0 ( 115 kB) > [ 0.000000] Preemptable hierarchical RCU implementation. > [ 0.000000] RCU-based detection of stalled CPUs is disabled. > [ 0.000000] Verbose stalled-CPUs detection is disabled. > [ 0.000000] NR_IRQS:320 nr_irqs:360 360 > [ 0.000000] sched_clock: 32 bits at 6MHz, resolution 153ns, wraps every 660764ms > [ 0.000000] Console: colour dummy device 80x30 > [ 0.000642] Calibrating delay loop... 199.06 BogoMIPS (lpj=995328) > [ 0.200611] pid_max: default: 32768 minimum: 301 > [ 0.201201] Mount-cache hash table entries: 512 > [ 0.202298] CPU: Testing write buffer coherency: ok > [ 0.216586] print_constraints: dummy: > [ 0.217107] NET: Registered protocol family 16 > [ 0.217256] Tauros2: Disabling L2 prefetch. > [ 0.217303] Tauros2: Enabling L2 cache. > [ 0.217342] Tauros2: L2 cache support initialised in ARMv7 mode. > [ 0.226952] bio: create slab <bio-0> at 0 > [ 0.229449] max8649 0-0060: Detected MAX8649 (ID:20) > [ 0.232597] print_constraints: vcc_core range: 1150 <--> 1280 mV at 1350 mV > [ 0.232809] max8649 0-0060: Max8649 regulator device is detected. > [ 0.239168] max8925 0-003c: No interrupt support on TSC IRQ > [ 0.240351] I2C: i2c-0: PXA I2C adapter > [ 0.242014] Switching to clocksource clocksource > [ 0.256623] NET: Registered protocol family 2 > [ 0.257127] IP route cache hash table entries: 4096 (order: 2, 16384 bytes) > [ 0.258084] TCP established hash table entries: 16384 (order: 5, 131072 bytes) > [ 0.259147] TCP bind hash table entries: 16384 (order: 4, 65536 bytes) > [ 0.259611] TCP: Hash tables configured (established 16384 bind 16384) > [ 0.259659] TCP reno registered > [ 0.259707] UDP hash table entries: 256 (order: 0, 4096 bytes) > [ 0.259792] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) > [ 0.260740] NET: Registered protocol family 1 > [ 0.261823] RPC: Registered udp transport module. > [ 0.261872] RPC: Registered tcp transport module. > [ 0.261910] RPC: Registered tcp NFSv4.1 backchannel transport module. > [ 0.267089] JFFS2 version 2.2. (NAND) .. 2001-2006 Red Hat, Inc. > [ 0.267953] msgmni has been set to 1007 > [ 0.269488] io scheduler noop registered > [ 0.269534] io scheduler deadline registered > [ 0.269713] io scheduler cfq registered (default) > [ 0.270745] pxa2xx-uart.0: ttyS0 at MMIO 0xd4030000 (irq = 27) is a FFUART > [ 0.271191] pxa2xx-uart.2: ttyS2 at MMIO 0xd4018000 (irq = 24) is a STUART > [ 1.470447] console [ttyS2] enabled > [ 1.483131] mousedev: PS/2 mouse device common for all mice > [ 1.501122] max8925-rtc max8925-rtc: rtc core: registered max8925-rtc as rtc0 > [ 1.522800] sdhci: Secure Digital Host Controller Interface driver > [ 1.541258] sdhci: Copyright(c) Pierre Ossman > [ 1.554557] mmc0: no vmmc regulator found > [ 1.566568] sdhci: =========== REGISTER DUMP (mmc0)=========== > [ 1.583976] sdhci: Sys addr: 0x00000000 | Version: 0x00000002 > [ 1.601394] sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000 > [ 1.618815] sdhci: Argument: 0x00000000 | Trn mode: 0x00000000 > [ 1.636236] sdhci: Present: 0x01ff0000 | Host ctl: 0x00000000 > [ 1.653654] sdhci: Power: 0x00000000 | Blk gap: 0x00000000 > [ 1.671070] sdhci: Wake-up: 0x00000000 | Clock: 0x00000000 > [ 1.688494] sdhci: Timeout: 0x00000000 | Int stat: 0x00000000 > [ 1.705916] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003 > [ 1.723334] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000 > [ 1.740752] sdhci: Caps: 0x25fcc8b2 | Caps_1: 0x00002f77 > [ 1.758174] sdhci: Cmd: 0x00000000 | Max curr: 0x00000000 > [ 1.775595] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000 > [ 1.793010] sdhci: =========================================== > [ 1.810666] mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0 > [ 1.832358] mmc0: SDHCI controller on MMC [sdhci-pxa.0] using ADMA > [ 1.850929] mmc0: mmc_rescan_try_freq: trying to init card at 400000 Hz > [ 1.871287] TCP cubic registered > [ 1.881003] mmc0: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 21 width 0 timing 0 > [ 1.902580] NET: Registered protocol family 17 > [ 1.916121] Registering the dns_resolver key type > [ 1.930357] VFP support v0.3: > [ 1.939016] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0 > [ 1.962417] implementor 56 architecture 2 part 20 variant 9 rev 5 > [ 1.980607] ThumbEE CPU extension supported. > [ 1.993589] PJ4 iWMMXt coprocessor enabled. > [ 2.008449] max8925-rtc max8925-rtc: setting system clock to 2007-02-05 00:51:33 UTC (1170636693) > [ 2.034998] mmc0: starting CMD52 arg 00000c00 flags 00000195 > [ 2.052704] Waiting 15sec before mounting root device... > [ 2.068948] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000 > [ 2.087707] mmc0: req done (CMD52): -110: 00000000 00000000 00000000 00000000 > [ 2.109069] mmc0: starting CMD52 arg 80000c08 flags 00000195 > [ 2.126291] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000 > [ 2.145002] mmc0: req done (CMD52): -110: 00000000 00000000 00000000 00000000 > [ 2.166321] mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 21 width 0 timing 0 > [ 2.190178] mmc0: starting CMD0 arg 00000000 flags 000000c0 > [ 2.206971] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001 > [ 2.225689] mmc0: req done (CMD0): 0: 00000000 00000000 00000000 00000000 > [ 2.246970] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0 > [ 2.270840] mmc0: starting CMD8 arg 000001aa flags 000002f5 > [ 2.287769] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001 > [ 2.306484] mmc0: req done (CMD8): 0: 000001aa 00000000 00000000 00000000 > [ 2.326761] mmc0: starting CMD5 arg 00000000 flags 000002e1 > [ 2.343734] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000 > [ 2.362434] mmc0: req failed (CMD5): -110, retrying... > [ 2.378087] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000 > [ 2.396780] mmc0: req failed (CMD5): -110, retrying... > [ 2.412441] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000 > [ 2.431149] mmc0: req failed (CMD5): -110, retrying... > [ 2.446788] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000 > [ 2.465489] mmc0: req done (CMD5): -110: 00000000 00000000 00000000 00000000 > [ 2.486546] mmc0: starting CMD55 arg 00000000 flags 000000f5 > [ 2.503754] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001 > [ 2.522482] mmc0: req done (CMD55): 0: 00400120 00000000 00000000 00000000 > [ 2.543011] mmc0: starting CMD41 arg 00000000 flags 000000e1 > [ 2.560182] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001 > [ 2.578901] mmc0: req done (CMD41): 0: 40ff8000 00000000 00000000 00000000 > [ 2.599452] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 20 width 0 timing 0 > [ 2.622315] mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 20 width 0 timing 0 > [ 2.646171] mmc0: starting CMD0 arg 00000000 flags 000000c0 > [ 2.662972] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at 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