Re: [patch]: sdhci support emmc ddr50 mode [v3]

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On Dec 21, 2010, at 4:37 AM, zhangfei gao wrote:

> v3: sync to mmc-next
>
> Emmc speed could double if using ddr50 mode, help check
>
> From 895c3d15a200d5f5803f992dab46ff114ad26f90 Mon Sep 17 00:00:00 2001
> From: Zhangfei Gao <zhangfei.gao@xxxxxxxxxxx>
> Date: Tue, 21 Dec 2010 19:51:38 -0500
> Subject: [PATCH] mmc: sdhci support emmc ddr50 mode
>
>       1. spec sdhc 3.0 does not claim support 1.2v ddr mode
>       2. Call back function set_power is added, since some controller count
> on external pmic to provide power
>       3. According to spec sdhc 3.0, uhs mode, including emmc ddr50 takes
> effect only when 1.8v Signaling Enable bit, which used for providing
> 1.8v.
>          So emmc ddr50 mode works after 1.8v switching process, though emmc
> ddr50 could work at high voltage such as 3.3v if external pmic provide
> voltage.
>          Limitation: emmc ddr50 mode only workable when both host and emmc
> card support 1.70-1.90v
>       4. According to JESD84, power down and power up is required to
> provide low voltage 1.70-1.90v to mmc.
>
>       Verified: toshiba emmc on mmp2, with io voltage at 1.8v provided by
> external pmic.
>
> Signed-off-by: Zhangfei Gao <zhangfei.gao@xxxxxxxxxxx>
> ---
> drivers/mmc/core/core.c  |   13 +++++++++++++
> drivers/mmc/core/core.h  |    1 +
> drivers/mmc/core/mmc.c   |    6 +++++-
> drivers/mmc/host/sdhci.c |   44 +++++++++++++++++++++++++++++++++++++++++---
> drivers/mmc/host/sdhci.h |   14 +++++++++++++-
> 5 files changed, 73 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index a8e89f3..fd657f1 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1012,6 +1012,19 @@ static void mmc_power_off(struct mmc_host *host)
> }
>
> /*
> + * mmc select low voltage 1.70-1.95v
> + */
> +void mmc_select_low_voltage(struct mmc_host *host, u32 ocr)
> +{
> +     if (!(ocr & MMC_VDD_165_195))
> +             return;
> +
> +     mmc_power_off(host);
> +     host->ocr = ocr & host->ocr_avail;
> +     mmc_power_up(host);
> +}
> +
> +/*
>  * Cleanup when the last reference to the bus operator is dropped.
>  */
> static void __mmc_release_bus(struct mmc_host *host)
> diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
> index 026c975..b05c20a 100644
> --- a/drivers/mmc/core/core.h
> +++ b/drivers/mmc/core/core.h
> @@ -41,6 +41,7 @@ void mmc_set_bus_width(struct mmc_host *host,
> unsigned int width);
> void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width,
>                          unsigned int ddr);
> u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
> +void mmc_select_low_voltage(struct mmc_host *host, u32 ocr);
> void mmc_set_timing(struct mmc_host *host, unsigned int timing);
>
> static inline void mmc_delay(unsigned int ms)
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index 86cac0d..8779339 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -790,7 +790,11 @@ int mmc_attach_mmc(struct mmc_host *host, u32 ocr)
>               ocr &= ~0x7F;
>       }
>
> -     host->ocr = mmc_select_voltage(host, ocr);
> +     if ((ocr & MMC_VDD_165_195)
> +                     && (host->ocr_avail & MMC_VDD_165_195))
> +             mmc_select_low_voltage(host, ocr);
> +     else
> +             host->ocr = mmc_select_voltage(host, ocr);
>
>       /*
>        * Can we support the voltage of the card?
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index d5febe5..aafbb42 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -986,6 +986,22 @@ static void sdhci_finish_command(struct sdhci_host *host)
>       host->cmd = NULL;
> }
>
> +static void sdhci_set_ddr(struct sdhci_host *host, unsigned int ddr)
> +{
> +     u16 con;
> +
> +     if (ddr == MMC_SDR_MODE)
> +             return;
> +
> +     con = sdhci_readw(host, SDHCI_HOST_CONTROL2);
> +     if (con & SDHCI_CTRL2_1_8V) {
> +             con &= ~SDHCI_CTRL2_UHS_MASK;
> +             if (ddr & MMC_1_8V_DDR_MODE)
> +                     con |= SDHCI_CTRL2_DDR50;
> +             sdhci_writew(host, con, SDHCI_HOST_CONTROL2);
> +     }
> +}
> +
> static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
> {
>       int div;
> @@ -1084,6 +1100,18 @@ static void sdhci_set_power(struct sdhci_host
> *host, unsigned short power)
>               return;
>       }
>
> +     if ((pwr == SDHCI_POWER_180) &&
> +             (host->mmc->caps & MMC_CAP_1_8V_DDR)) {
> +             u16 con;
> +
> +             con = sdhci_readw(host, SDHCI_HOST_CONTROL2);
> +             con |= SDHCI_CTRL2_1_8V;
> +             sdhci_writew(host, con, SDHCI_HOST_CONTROL2);
> +
> +             if (host->ops->set_power)
> +                     host->ops->set_power(host, pwr);
> +     }
> +
>       /*
>        * Spec says that we should clear the power reg before setting
>        * a new value. Some controllers don't seem to like this though.
> @@ -1180,6 +1208,7 @@ static void sdhci_set_ios(struct mmc_host *mmc,
> struct mmc_ios *ios)
>       }
>
>       sdhci_set_clock(host, ios->clock);
> +     sdhci_set_ddr(host, ios->ddr);
>
>       if (ios->power_mode == MMC_POWER_OFF)
>               sdhci_set_power(host, -1);
> @@ -1744,7 +1773,7 @@ EXPORT_SYMBOL_GPL(sdhci_alloc_host);
> int sdhci_add_host(struct sdhci_host *host)
> {
>       struct mmc_host *mmc;
> -     unsigned int caps, ocr_avail;
> +     unsigned int caps, caps_h = 0, ocr_avail;
>       int ret;
>
>       WARN_ON(host == NULL);
> @@ -1767,8 +1796,17 @@ int sdhci_add_host(struct sdhci_host *host)
>                       host->version);
>       }
>
> -     caps = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps :
> -             sdhci_readl(host, SDHCI_CAPABILITIES);
> +     if (host->quirks & SDHCI_QUIRK_MISSING_CAPS)
> +             caps = host->caps;
> +     else {
> +             caps = sdhci_readl(host, SDHCI_CAPABILITIES);
> +             caps_h = sdhci_readl(host, SDHCI_CAPABILITIES_1);
> +     }
> +
> +     if (caps & SDHCI_CAN_VDD_180) {
> +             if (caps_h & SDHCI_CAN_SDR50)
> +                     mmc->caps |= (MMC_CAP_1_8V_DDR);
> +     }
>
>       if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
>               host->flags |= SDHCI_USE_SDMA;
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index 6e0969e..c4bd5dd 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -145,7 +145,14 @@
>
> #define SDHCI_ACMD12_ERR      0x3C
>
> -/* 3E-3F reserved */
> +#define SDHCI_HOST_CONTROL2  0x3E
> +#define  SDHCI_CTRL2_UHS_MASK        0x0007
> +#define   SDHCI_CTRL2_SDR12  0x0000
> +#define   SDHCI_CTRL2_SDR25  0x0001
> +#define   SDHCI_CTRL2_SDR50  0x0002
> +#define   SDHCI_CTRL2_SDR104 0x0003
> +#define   SDHCI_CTRL2_DDR50  0x0004
> +#define  SDHCI_CTRL2_1_8V    0x0008
>
> #define SDHCI_CAPABILITIES    0x40
> #define  SDHCI_TIMEOUT_CLK_MASK       0x0000003F
> @@ -167,6 +174,9 @@
> #define  SDHCI_CAN_64BIT      0x10000000
>
> #define SDHCI_CAPABILITIES_1  0x44
> +#define  SDHCI_CAN_SDR50     0x00000001
> +#define  SDHCI_CAN_SDR104    0x00000002
> +#define  SDHCI_CAN_DDR50     0x00000004
>
> #define SDHCI_MAX_CURRENT     0x48
>
> @@ -222,6 +232,8 @@ struct sdhci_ops {
>       void (*platform_send_init_74_clocks)(struct sdhci_host *host,
>                                            u8 power_mode);
>       unsigned int    (*get_ro)(struct sdhci_host *host);
> +     unsigned int    (*set_power)(struct sdhci_host *host,
> +                             unsigned short power);
> };
>
> #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
> --
> 1.7.0.4
> <0001-mmc-sdhci-support-emmc-ddr50-mode.patch>



Does not work for me on mmp2 using linux next.  Partition table not found
trace below
Loading: #################################################################




















         ########################################################
done
Bytes transferred = 1766924 (1af60c hex)
MMP2>> boot
Ready to boot zImage from 1100000


Starting kernel ...

[    0.000000] Linux version 2.6.37-rc6-next-20101220-00022-g8b35e00-dirty (root@philip-laptop) (gcc version 4.2.0 20070413 (prerelease) (CodeSourcery 2007q1-10. Marvell 2009q3-18 20090821)) #51 PREEMPT Tu0
[    0.000000] CPU: Marvell PJ4 processor [560f5815] revision 5 (ARMv7), cr=00c5387f
[    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 c03713d0, node_mem_map c0390000
[    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=0x4800
[    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: 516108k/516108k available, 8180k 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 - 0xc0354004   (3285 kB)
[    0.000000]       .data : 0xc0356000 - 0xc0372c40   ( 116 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
[    0.000023] Calibrating delay loop... 796.26 BogoMIPS (lpj=3981312)
[    0.220162] pid_max: default: 32768 minimum: 301
[    0.220323] Mount-cache hash table entries: 512
[    0.220629] CPU: Testing write buffer coherency: ok
[    0.224390] print_constraints: dummy: regulator:
[    0.224390] NET: Registered protocol family 16
[    0.224518] Tauros2: Disabling L2 prefetch.
[    0.224560] Tauros2: L2 cache support initialised in ARMv6 mode.
[    0.227660] bio: create slab <bio-0> at 0
[    0.228859] Switching to clocksource clocksource
[    0.233823] NET: Registered protocol family 2
[    0.233966] IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
[    0.234294] TCP established hash table entries: 16384 (order: 5, 131072 bytes)
[    0.234544] TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
[    0.234544] TCP: Hash tables configured (established 16384 bind 16384)
[    0.234661] TCP reno registered
[    0.234674] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.234688] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.234868] NET: Registered protocol family 1
[    0.235278] RPC: Registered udp transport module.
[    0.235278] RPC: Registered tcp transport module.
[    0.235295] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.237007] JFFS2 version 2.2. (NAND) .. 2001-2006 Red Hat, Inc.
[    0.237253] msgmni has been set to 1008
[    0.237921] io scheduler noop registered
[    0.237937] io scheduler deadline registered
[    0.237937] io scheduler cfq registered (default)
[    0.238510] pxa2xx-uart.0: ttyS0 at MMIO 0xd4030000 (irq = 27) is a FFUART
[    0.238510] pxa2xx-uart.2: ttyS2 at MMIO 0xd4018000 (irq = 24) is a STUART
[    1.352386] console [ttyS2] enabled
[    1.363462] mousedev: PS/2 mouse device common for all mice
[    1.380052] sdhci: Secure Digital Host Controller Interface driver
[    1.398589] sdhci: Copyright(c) Pierre Ossman
[    1.411584] set_clock_and_burst_size:mmc0: adjust = 1
[    1.426715] set_clock_and_burst_size:mmc0: (B) SD_CLOCK_AND_BURST = 00C5, delay = 15, sel = 1
[    1.452068] set_clock_and_burst_size:mmc0: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 1FC5
[    1.474880] mmc0: no vmmc regulator found
[    1.486806] set_clock_and_burst_size:mmc0: adjust = 1
[    1.501827] set_clock_and_burst_size:mmc0: (B) SD_CLOCK_AND_BURST = 00C5, delay = 15, sel = 1
[    1.527204] set_clock_and_burst_size:mmc0: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 1FC5
[    1.549982] sdhci: =========== REGISTER DUMP (mmc0)===========
[    1.567313] sdhci: Sys addr: 0x00000000 | Version:  0x00000002
[    1.584666] sdhci: Blk size: 0x00000000 | Blk cnt:  0x00000000
[    1.602003] sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
[    1.619344] sdhci: Present:  0x01fa0000 | Host ctl: 0x00000000
[    1.636685] sdhci: Power:    0x00000000 | Blk gap:  0x00000000
[    1.654029] sdhci: Wake-up:  0x00000000 | Clock:    0x00000000
[    1.671373] sdhci: Timeout:  0x00000000 | Int stat: 0x00000000
[    1.688713] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
[    1.706058] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
[    1.723399] sdhci: Caps:     0x25fcc8b2 | Caps_1:   0x00002f77
[    1.740741] sdhci: Cmd:      0x00000000 | Max curr: 0x00000000
[    1.758081] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
[    1.775432] sdhci: ===========================================
[    1.792896] mmc_power_off:mmc0: ENTER
[    1.803799] mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
[    1.825042] set_clock_and_burst_size:mmc0: adjust = 1
[    1.825042] set_clock_and_burst_size:mmc0: (B) SD_CLOCK_AND_BURST = 00C5, delay = 15, sel = 1
[    1.840029] set_clock_and_burst_size:mmc0: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 1FC5
[    1.888227] mmc0: SDHCI controller on MMC [sdhci-pxa.2] using ADMA
[    1.906642] mmc0: mmc_rescan: trying to init card at 400000 Hz
[    1.924028] mmc_power_up:mmc0: ENTER
[    1.934670] mmc0: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 21 width 0 timing 0
[    1.956225] set_clock_and_burst_size:mmc1: adjust = 1
[    1.971333] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0
[    1.994208] generate_initial_74_clocks:mmc0 ENTER: slot->power_mode = 1,ios->power_mode = 2
[    2.019862] set_clock_and_burst_size:mmc1: (B) SD_CLOCK_AND_BURST = 00C5, delay = 31, sel = 1
[    2.045262] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0
[    2.068038] mmc0: starting CMD52 arg 00000c00 flags 00000195
[    2.084902] set_clock_and_burst_size:mmc1: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 3FC5
[    2.107679] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.126336] mmc0: req done (CMD52): -110: 00000000 00000000 00000000 00000000
[    2.147563] mmc0: starting CMD52 arg 80000c08 flags 00000195
[    2.164426] mmc1: no vmmc regulator found
[    2.176382] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.195017] mmc0: req done (CMD52): -110: 00000000 00000000 00000000 00000000
[    2.216291] mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 21 width 0 timing 0
[    2.239066] mmc0: starting CMD0 arg 00000000 flags 000000c0
[    2.256653] set_clock_and_burst_size:mmc1: adjust = 1
[    2.271682] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    2.290309] mmc0: req done (CMD0): 0: 00000000 00000000 00000000 00000000
[    2.310497] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0
[    2.334306] mmc0: starting CMD8 arg 000001aa flags 000002f5
[    2.351886] set_clock_and_burst_size:mmc1: (B) SD_CLOCK_AND_BURST = 00C5, delay = 31, sel = 1
[    2.377254] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.395890] mmc0: req done (CMD8): -110: 00000000 00000000 00000000 00000000
[    2.416880] mmc0: starting CMD5 arg 00000000 flags 000002e1
[    2.433487] set_clock_and_burst_size:mmc1: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 3FC5
[    2.456268] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.474916] mmc0: req failed (CMD5): -110, retrying...
[    2.490186] sdhci: =========== REGISTER DUMP (mmc1)===========
[    2.507544] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.526177] mmc0: req failed (CMD5): -110, retrying...
[    2.541469] sdhci: Sys addr: 0x00000000 | Version:  0x00000002
[    2.558803] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.577433] mmc0: req failed (CMD5): -110, retrying...
[    2.592713] sdhci: Blk size: 0x00000000 | Blk cnt:  0x00000000
[    2.610051] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.628684] mmc0: req done (CMD5): -110: 00000000 00000000 00000000 00000000
[    2.649651] mmc0: starting CMD55 arg 00000000 flags 000000f5
[    2.666514] sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
[    2.683870] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.702501] mmc0: req done (CMD55): -110: 00000000 00000000 00000000 00000000
[    2.723725] mmc0: starting CMD55 arg 00000000 flags 000000f5
[    2.740589] sdhci: Present:  0x01fa0000 | Host ctl: 0x00000000
[    2.757949] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.776577] mmc0: req done (CMD55): -110: 00000000 00000000 00000000 00000000
[    2.797801] mmc0: starting CMD55 arg 00000000 flags 000000f5
[    2.814663] sdhci: Power:    0x00000000 | Blk gap:  0x00000000
[    2.832016] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.850651] mmc0: req done (CMD55): -110: 00000000 00000000 00000000 00000000
[    2.871875] mmc0: starting CMD55 arg 00000000 flags 000000f5
[    2.888737] sdhci: Wake-up:  0x00000000 | Clock:    0x00000000
[    2.906093] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00018000
[    2.924743] mmc0: req done (CMD55): -110: 00000000 00000000 00000000 00000000
[    2.945950] mmc0: starting CMD1 arg 00000000 flags 000000e1
[    2.962556] sdhci: Timeout:  0x00000000 | Int stat: 0x00000000
[    2.979910] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    2.998544] mmc0: req done (CMD1): 0: 40ff8080 00000000 00000000 00000000
[    3.018732] mmc_attach_mmc:mmc0: ocr = 40ff8080
[    3.032230] mmc_select_low_voltage:mmc0: ENTER
[    3.045435] mmc_power_off:mmc0: ENTER
[    3.056313] mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
[    3.077543] set_clock_and_burst_size:mmc0: adjust = 1
[    3.077543] set_clock_and_burst_size:mmc0: (B) SD_CLOCK_AND_BURST = 00C5, delay = 15, sel = 1
[    3.092534] set_clock_and_burst_size:mmc0: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 1FC5
[    3.140629] mmc_power_up:mmc0: ENTER
[    3.151255] mmc0: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 7 width 0 timing 0
[    3.172476] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
[    3.189836] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 7 width 0 timing 0
[    3.212432] generate_initial_74_clocks:mmc0 ENTER: slot->power_mode = 1,ios->power_mode = 2
[    3.238059] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
[    3.255427] mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 7 width 0 timing 0
[    3.278878] mmc0: starting CMD0 arg 00000000 flags 000000c0
[    3.295554] sdhci: Caps:     0x25fcc8b2 | Caps_1:   0x00002f77
[    3.312911] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    3.331547] mmc0: req done (CMD0): 0: 00000000 00000000 00000000 00000000
[    3.351734] mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 7 width 0 timing 0
[    3.375260] mmc0: starting CMD1 arg 40300080 flags 000000e1
[    3.392854] sdhci: Cmd:      0x00000000 | Max curr: 0x00000000
[    3.410196] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    3.428830] mmc0: req done (CMD1): 0: 40ff8080 00000000 00000000 00000000
[    3.449035] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
[    3.466388] sdhci: ===========================================
[    3.483748] mmc0: starting CMD1 arg 40300080 flags 000000e1
[    3.500460] mmc_power_off:mmc1: ENTER
[    3.511342] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    3.530016] mmc0: req done (CMD1): 0: c0ff8080 00000000 00000000 00000000
[    3.550235] mmc0: starting CMD2 arg 00000000 flags 00000067
[    3.566816] mmc1: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
[    3.588044] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    3.606698] mmc0: req done (CMD2): 0: 45010053 454d3038 479031ce 57f97d00
[    3.626919] mmc0: starting CMD3 arg 00010000 flags 00000015
[    3.643513] set_clock_and_burst_size:mmc1: adjust = 1
[    3.643513] set_clock_and_burst_size:mmc1: (B) SD_CLOCK_AND_BURST = 00C5, delay = 31, sel = 1
[    3.658512] set_clock_and_burst_size:mmc1: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 3FC5
[    3.706605] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    3.725253] mmc0: req done (CMD3): 0: 00000500 00000000 00000000 00000000
[    3.745474] mmc0: clock 400000Hz busmode 2 powermode 2 cs 0 Vdd 7 width 0 timing 0
[    3.767990] mmc0: starting CMD9 arg 00010000 flags 00000007
[    3.784621] mmc1: SDHCI controller on MMC [sdhci-pxa.0] using ADMA
[    3.803019] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    3.821642] mmc0: req done (CMD9): 0: d00f0032 0f5903ff ffffffff 92404000
[    3.841857] mmc0: starting CMD7 arg 00010000 flags 00000015
[    3.858458] set_clock_and_burst_size:mmc2: adjust = 1
[    3.873548] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    3.892206] mmc0: req done (CMD7): 0: 00000700 00000000 00000000 00000000
[    3.912445] mmc0: starting CMD8 arg 00000000 flags 000000b5
[    3.929016] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[    3.949502] set_clock_and_burst_size:mmc2: (B) SD_CLOCK_AND_BURST = 00C5, delay = 15, sel = 1
[    3.974859] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000003
[    3.993499] mmc0: req done (CMD8): 0: 00000900 00000000 00000000 00000000
[    4.013703] mmc0:     512 bytes transferred: 0
[    4.026910] mmc0: starting CMD6 arg 03b90101 flags 0000049d
[    4.043523] set_clock_and_burst_size:mmc2: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 1FC5
[    4.066302] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000003
[    4.084943] mmc0: req done (CMD6): 0: 00000800 00000000 00000000 00000000
[    4.105253] mmc0: starting CMD13 arg 00010000 flags 00000195
[    4.122127] mmc2: no vmmc regulator found
[    4.134099] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    4.152759] mmc0: req done (CMD13): 0: 00000900 00000000 00000000 00000000
[    4.173232] mmc0: clock 400000Hz busmode 2 powermode 2 cs 0 Vdd 7 width 0 timing 1
[    4.195775] mmc0: clock 52000000Hz busmode 2 powermode 2 cs 0 Vdd 7 width 0 timing 1
[    4.218842] mmc0: starting CMD6 arg 03b70201 flags 0000049d
[    4.235428] set_clock_and_burst_size:mmc2: adjust = 1
[    4.250456] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000003
[    4.269105] mmc0: req done (CMD6): 0: 00000800 00000000 00000000 00000000
[    4.289300] mmc0: starting CMD13 arg 00010000 flags 00000195
[    4.306152] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[    4.324792] mmc0: req done (CMD13): 0: 00000900 00000000 00000000 00000000
[    4.345235] ------------[ cut here ]------------
[    4.345249] WARNING: at kernel/sched.c:4000 schedule+0x25c/0x3ac()
[    4.377317] Modules linked in:
[    4.377317] [<c002abe8>] (unwind_backtrace+0x0/0x124) from [<c003834c>] (warn_slowpath_common+0x4c/0x64)
[    4.386390] [<c003834c>] (warn_slowpath_common+0x4c/0x64) from [<c0038380>] (warn_slowpath_null+0x1c/0x24)
[    4.414575] [<c0038380>] (warn_slowpath_null+0x1c/0x24) from [<c028909c>] (schedule+0x25c/0x3ac)
[    4.469417] [<c028909c>] (schedule+0x25c/0x3ac) from [<c028922c>] (preempt_schedule+0x40/0x70)
[    4.469417] [<c028922c>] (preempt_schedule+0x40/0x70) from [<c0039284>] (vprintk+0x36c/0x3a4)
[    4.520387] [<c0039284>] (vprintk+0x36c/0x3a4) from [<c00392dc>] (printk+0x20/0x30)
[    4.543167] [<c00392dc>] (printk+0x20/0x30) from [<c01efa18>] (platform_reset_exit+0x48/0x124)
[    4.543167] [<c01efa18>] (platform_reset_exit+0x48/0x124) from [<c01ed4a8>] (sdhci_reset+0xf4/0x11c)
[    4.595936] [<c01ed4a8>] (sdhci_reset+0xf4/0x11c) from [<c01ed878>] (sdhci_init+0x1c/0x5c)
[    4.595936] [<c01ed878>] (sdhci_init+0x1c/0x5c) from [<c01ef87c>] (sdhci_add_host+0x5fc/0x70c)
[    4.620516] [<c01ef87c>] (sdhci_add_host+0x5fc/0x70c) from [<c0288a44>] (sdhci_pxa_probe+0x1c0/0x27c)
[    4.673552] [<c0288a44>] (sdhci_pxa_probe+0x1c0/0x27c) from [<c01c10d0>] (platform_drv_probe+0x1c/0x24)
[    4.673552] [<c01c10d0>] (platform_drv_probe+0x1c/0x24) from [<c01bff94>] (driver_probe_device+0x124/0x22c)
[    4.701490] [<c01bff94>] (driver_probe_device+0x124/0x22c) from [<c01c027c>] (__driver_attach+0x60/0x84)
[    4.758661] [<c01c027c>] (__driver_attach+0x60/0x84) from [<c01bf074>] (bus_for_each_dev+0x4c/0x80)
[    4.785566] [<c01bf074>] (bus_for_each_dev+0x4c/0x80) from [<c01bf8d0>] (bus_add_driver+0xc0/0x248)
[    4.812472] [<c01bf8d0>] (bus_add_driver+0xc0/0x248) from [<c01c050c>] (driver_register+0xac/0x13c)
[    4.812472] [<c01c050c>] (driver_register+0xac/0x13c) from [<c001f434>] (do_one_initcall+0xbc/0x18c)
[    4.839390] [<c001f434>] (do_one_initcall+0xbc/0x18c) from [<c00086e0>] (kernel_init+0x98/0x14c)
[    4.866546] [<c00086e0>] (kernel_init+0x98/0x14c) from [<c00263e0>] (kernel_thread_exit+0x0/0x8)
[    4.892679] ---[ end trace 8b39c6115c20996a ]---
[    4.932567] set_clock_and_burst_size:mmc2: (B) SD_CLOCK_AND_BURST = 00C5, delay = 15, sel = 1
[    4.957952] mmc0: clock 52000000Hz busmode 2 powermode 2 cs 0 Vdd 7 width 3 timing 1
[    4.981020] mmc0: starting CMD19 arg 00000000 flags 000000b5
[    4.997867] mmc0:     blksz 8 blocks 1 flags 00000100 tsac 0 ms nsac 0
[    5.017307] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[    5.035948] set_clock_and_burst_size:mmc2: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 1FC5
[    5.058745] sdhci: =========== REGISTER DUMP (mmc2)===========
[    5.076090] sdhci: Sys addr: 0x00000000 | Version:  0x00000002
[    5.093431] sdhci: Blk size: 0x00000000 | Blk cnt:  0x00000000
[    5.110778] sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
[    5.128113] sdhci: Present:  0x01f20000 | Host ctl: 0x00000000
[    5.145458] sdhci: Power:    0x00000000 | Blk gap:  0x00000000
[    5.162801] sdhci: Wake-up:  0x00000000 | Clock:    0x00000000
[    5.180143] sdhci: Timeout:  0x00000000 | Int stat: 0x00000000
[    5.197490] sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00ff0003
[    5.214828] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
[    5.232170] sdhci: Caps:     0x25fcc8b2 | Caps_1:   0x00002f77
[    5.249514] sdhci: Cmd:      0x00000000 | Max curr: 0x00000000
[    5.266853] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
[    5.284200] sdhci: ===========================================
[    5.301664] mmc_power_off:mmc2: ENTER
[    5.312569] mmc2: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
[    5.333806] set_clock_and_burst_size:mmc2: adjust = 1
[    5.333816] set_clock_and_burst_size:mmc2: (B) SD_CLOCK_AND_BURST = 00C5, delay = 15, sel = 1
[    5.348826] set_clock_and_burst_size:mmc2: (A) SD_CLOCK_AND_BURST_SIZE_SETUP = 1FC5
[    5.396942] mmc2: SDHCI controller on MMC [sdhci-pxa.1] using ADMA
[    5.415519] TCP cubic registered
[    5.425136] NET: Registered protocol family 17
[    5.438418] Registering the dns_resolver key type
[    5.452421] VFP support v0.3: implementor 56 architecture 2 part 20 variant 9 rev 5
[    5.475688] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
[    5.494606] Waiting 15sec before mounting root device...
[   15.028875] mmc0: Timeout waiting for hardware interrupt.
[   15.028886] sdhci: =========== REGISTER DUMP (mmc0)===========
[   15.044932] sdhci: Sys addr: 0x00000000 | Version:  0x00000002
[   15.062248] sdhci: Blk size: 0x00007008 | Blk cnt:  0x00000000
[   15.096880] sdhci: Argument: 0x00000000 | Trn mode: 0x00000003
[   15.096880] sdhci: Present:  0x01fa0000 | Host ctl: 0x00000035
[   15.114198] sdhci: Power:    0x0000000b | Blk gap:  0x00000000
[   15.131514] sdhci: Wake-up:  0x00000000 | Clock:    0x00000207
[   15.148831] sdhci: Timeout:  0x0000000e | Int stat: 0x00000000
[   15.166148] sdhci: Int enab: 0x02ff000b | Sig enab: 0x02ff000b
[   15.200782] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
[   15.218099] sdhci: Caps:     0x25fcc8b2 | Caps_1:   0x00002f77
[   15.218099] sdhci: Cmd:      0x0000133a | Max curr: 0x00000000
[   15.235416] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x1f943808
[   15.252733] sdhci: ===========================================
[   15.287391] mmc0: req done (CMD19): 0: 00000000 00000000 00000000 00000000
[   15.307852] mmc0:     0 bytes transferred: -110
[   15.321336] mmc0: starting CMD14 arg 00000000 flags 000000b5
[   15.338178] mmc0:     blksz 8 blocks 1 flags 00000200 tsac 0 ms nsac 0
[   15.357630] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000003
[   15.376281] mmc0: req done (CMD14): 0: 00001300 00000000 00000000 00000000
[   15.396738] mmc0:     8 bytes transferred: 0
[   15.409456] mmc0: starting CMD6 arg 03b70601 flags 0000049d
[   15.426403] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000003
[   15.445051] mmc0: req done (CMD6): 0: 00000800 00000000 00000000 00000000
[   15.465275] mmc0: starting CMD13 arg 00010000 flags 00000195
[   15.482119] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   15.500770] mmc0: req done (CMD13): 0: 00000900 00000000 00000000 00000000
[   15.521225] mmc0: clock 52000000Hz busmode 2 powermode 2 cs 0 Vdd 7 width 3 timing 1
[   15.544295] mmc0: new high speed DDR MMC card at address 0001
[   15.561727] mmcblk0: mmc0:0001 SEM08G 7.39 GiB
[   15.575658] mmc0: starting CMD18 arg 00000000 flags 000000b5
[   15.592556] mmc0:     blksz 512 blocks 8 flags 00000200 tsac 100 ms nsac 0
[   15.613031] mmc0:     CMD12 arg 00000000 flags 0000049d
[   15.628605] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   15.647270] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00208002
[   15.665927] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000003
[   15.684563] mmc0: req done (CMD18): 0: 00000900 00000000 00000000 00000000
[   15.705030] mmc0:     0 bytes transferred: -84
[   15.718234] mmc0:     (CMD12): 0: 00000b00 00000000 00000000 00000000
[   15.737416] mmcblk0: retrying using single block read
[   15.752440] mmc0: starting CMD17 arg 00000000 flags 000000b5
[   15.769301] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   15.789746] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   15.808390] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00208002
[   15.827030] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   15.847496] mmc0:     0 bytes transferred: -84
[   15.860718] mmc0: starting CMD13 arg 00010000 flags 00000195
[   15.877566] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   15.896217] mmc0: req done (CMD13): 0: 00000900 00000000 00000000 00000000
[   15.916671] mmcblk0: error -84 transferring data, sector 0, nr 8, card status 0x900
[   15.939470] end_request: I/O error, dev mmcblk0, sector 0
[   15.955529] mmc0: starting CMD17 arg 00000001 flags 000000b5
[   15.972363] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   15.992831] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.011469] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00208002
[   16.030122] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   16.050567] mmc0:     0 bytes transferred: -84
[   16.063872] mmc0: starting CMD13 arg 00010000 flags 00000195
[   16.080731] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.099367] mmc0: req done (CMD13): 0: 00000900 00000000 00000000 00000000
[   16.119836] mmcblk0: error -84 transferring data, sector 1, nr 7, card status 0x900
[   16.142611] end_request: I/O error, dev mmcblk0, sector 1
[   16.158666] mmc0: starting CMD17 arg 00000002 flags 000000b5
[   16.175513] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   16.195980] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.214626] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   16.233256] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   16.253719] mmc0:     512 bytes transferred: 0
[   16.266939] mmc0: starting CMD17 arg 00000003 flags 000000b5
[   16.283786] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   16.304265] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.322913] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   16.341547] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   16.362015] mmc0:     512 bytes transferred: 0
[   16.375231] mmc0: starting CMD17 arg 00000004 flags 000000b5
[   16.392083] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   16.412574] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.431207] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   16.449845] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   16.470309] mmc0:     512 bytes transferred: 0
[   16.483526] mmc0: starting CMD17 arg 00000005 flags 000000b5
[   16.500375] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   16.520858] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.539504] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   16.558136] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   16.578611] mmc0:     512 bytes transferred: 0
[   16.591827] mmc0: starting CMD17 arg 00000006 flags 000000b5
[   16.608668] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   16.629138] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.647771] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   16.666410] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   16.686874] mmc0:     512 bytes transferred: 0
[   16.700094] mmc0: starting CMD17 arg 00000007 flags 000000b5
[   16.716938] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   16.737408] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.756042] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   16.774693] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   16.795145] mmc0:     512 bytes transferred: 0
[   16.808363] Buffer I/O error on device mmcblk0, logical block 0
[   16.826124] mmc0: starting CMD18 arg 00000000 flags 000000b5
[   16.842977] mmc0:     blksz 512 blocks 8 flags 00000200 tsac 100 ms nsac 0
[   16.863444] mmc0:     CMD12 arg 00000000 flags 0000049d
[   16.878990] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   16.897629] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00208002
[   16.916278] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000003
[   16.934938] mmc0: req done (CMD18): 0: 00000900 00000000 00000000 00000000
[   16.955390] mmc0:     0 bytes transferred: -84
[   16.968594] mmc0:     (CMD12): 0: 00000b00 00000000 00000000 00000000
[   16.987767] mmcblk0: retrying using single block read
[   17.002797] mmc0: starting CMD17 arg 00000000 flags 000000b5
[   17.019625] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   17.040106] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.058750] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00208002
[   17.077391] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   17.097855] mmc0:     0 bytes transferred: -84
[   17.111076] mmc0: starting CMD13 arg 00010000 flags 00000195
[   17.127925] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.146577] mmc0: req done (CMD13): 0: 00000900 00000000 00000000 00000000
[   17.167029] mmcblk0: error -84 transferring data, sector 0, nr 8, card status 0x900
[   17.189822] end_request: I/O error, dev mmcblk0, sector 0
[   17.205874] mmc0: starting CMD17 arg 00000001 flags 000000b5
[   17.222730] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   17.243181] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.261824] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00208002
[   17.280461] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   17.300927] mmc0:     0 bytes transferred: -84
[   17.314144] mmc0: starting CMD13 arg 00010000 flags 00000195
[   17.331009] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.349648] mmc0: req done (CMD13): 0: 00000900 00000000 00000000 00000000
[   17.370113] mmcblk0: error -84 transferring data, sector 1, nr 7, card status 0x900
[   17.392892] end_request: I/O error, dev mmcblk0, sector 1
[   17.408944] mmc0: starting CMD17 arg 00000002 flags 000000b5
[   17.425791] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   17.446265] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.464904] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   17.483535] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   17.504007] mmc0:     512 bytes transferred: 0
[   17.517236] mmc0: starting CMD17 arg 00000003 flags 000000b5
[   17.534069] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   17.554548] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.573192] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   17.591844] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   17.612301] mmc0:     512 bytes transferred: 0
[   17.625513] mmc0: starting CMD17 arg 00000004 flags 000000b5
[   17.642362] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   17.662846] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.681486] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   17.700125] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   17.720597] mmc0:     512 bytes transferred: 0
[   17.733811] mmc0: starting CMD17 arg 00000005 flags 000000b5
[   17.750656] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   17.771139] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.789791] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   17.808436] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   17.828888] mmc0:     512 bytes transferred: 0
[   17.842105] mmc0: starting CMD17 arg 00000006 flags 000000b5
[   17.858954] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   17.879432] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   17.898077] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   17.916717] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   17.937181] mmc0:     512 bytes transferred: 0
[   17.950419] mmc0: starting CMD17 arg 00000007 flags 000000b5
[   17.967247] mmc0:     blksz 512 blocks 1 flags 00000200 tsac 100 ms nsac 0
[   17.987702] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
[   18.006346] sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000002
[   18.025004] mmc0: req done (CMD17): 0: 00000900 00000000 00000000 00000000
[   18.045452] mmc0:     512 bytes transferred: 0
[   18.058788] Buffer I/O error on device mmcblk0, logical block 0
[   18.076456]  mmcblk0: unable to read partition table
[   18.091572] mmc0: clock 52000000Hz busmode 2 powermode 2 cs 0 Vdd 7 width 3 timing 1

[   20.519040] VFS: Cannot open root device "mmcblk0p1" or unknown-block(179,1)
[   20.540046] Please append a correct "root=" boot option; here are the available partitions:
[   20.564884] b300         7757824 mmcblk0  driver: mmcblk
[   20.580725] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,1)
[   20.605824] [<c002abe8>] (unwind_backtrace+0x0/0x124) from [<c0038518>] (panic+0x6c/0x18c)
[   20.630434] [<c0038518>] (panic+0x6c/0x18c) from [<c0008d94>] (mount_block_root+0x1c4/0x204)
[   20.655573] [<c0008d94>] (mount_block_root+0x1c4/0x204) from [<c0008e74>] (mount_root+0xa0/0xc4)
[   20.681727] [<c0008e74>] (mount_root+0xa0/0xc4) from [<c0008fb4>] (prepare_namespace+0x11c/0x174)
[   20.708124] [<c0008fb4>] (prepare_namespace+0x11c/0x174) from [<c0008750>] (kernel_init+0x108/0x14c)
[   20.735311] [<c0008750>] (kernel_init+0x108/0x14c) from [<c00263e0>] (kernel_thread_exit+0x0/0x8)


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