On Dec 21, 2010, at 6:24 PM, zhangfei gao wrote:
> On Wed, Dec 22, 2010 at 6:41 AM, Philip Rakity <prakity@xxxxxxxxxxx> wrote:
>>
>> On Dec 21, 2010, at 1:34 PM, Philip Rakity wrote:
>>
>>>
>>> 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)
>>>
>>>
>>
>>
>>
>>
>> If I use only the code in /drivers/mmc/core/ that handles dual voltage -- and no code in /drivers/mmc/host I can boot.
>>
>> The code for dual voltage should be a separate patch and not coupled to ddr since mmc cards may switch to lower
>> voltages after they come up in high voltage mode and NOT support ddr.
>>
>> trace (working) below
>>
>> [ 0.000000] Linux version 2.6.37-rc6-next-20101220-00022-g8b35e00-dirty (philip@philip-laptop) (gcc version 4.2.0 20070413 (prerelease) (CodeSourcery 2007q1-10. Marvell 2009q3-18 20090821)) #61 PREEMPT 0
>> [ 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 - 0xc0373020 ( 117 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
>> [ 0.000167] Calibrating delay loop... 796.26 BogoMIPS (lpj=3981312)
>> [ 0.220131] pid_max: default: 32768 minimum: 301
>> [ 0.220162] Mount-cache hash table entries: 512
>> [ 0.220631] CPU: Testing write buffer coherency: ok
>> [ 0.224391] print_constraints: dummy: regulator:
>> [ 0.224391] NET: Registered protocol family 16
>> [ 0.224517] Tauros2: Disabling L2 prefetch.
>> [ 0.224570] Tauros2: L2 cache support initialised in ARMv6 mode.
>> [ 0.227697] bio: create slab <bio-0> at 0
>> [ 0.228912] Switching to clocksource clocksource
>> [ 0.233930] NET: Registered protocol family 2
>> [ 0.234072] IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
>> [ 0.234401] TCP established hash table entries: 16384 (order: 5, 131072 bytes)
>> [ 0.234401] TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
>> [ 0.234650] TCP: Hash tables configured (established 16384 bind 16384)
>> [ 0.234780] TCP reno registered
>> [ 0.234780] UDP hash table entries: 256 (order: 0, 4096 bytes)
>> [ 0.234795] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
>> [ 0.234972] NET: Registered protocol family 1
>> [ 0.235374] RPC: Registered udp transport module.
>> [ 0.235374] RPC: Registered tcp transport module.
>> [ 0.235392] RPC: Registered tcp NFSv4.1 backchannel transport module.
>> [ 0.237085] JFFS2 version 2.2. (NAND) .. 2001-2006 Red Hat, Inc.
>> [ 0.237085] msgmni has been set to 1008
>> [ 0.238008] io scheduler noop registered
>> [ 0.238008] io scheduler deadline registered
>> [ 0.238090] io scheduler cfq registered (default)
>> [ 0.238599] pxa2xx-uart.0: ttyS0 at MMIO 0xd4030000 (irq = 27) is a FFUART
>> [ 0.238775] pxa2xx-uart.2: ttyS2 at MMIO 0xd4018000 (irq = 24) is a STUART
>> [ 1.352989] console [ttyS2] enabled
>> [ 1.363373] mousedev: PS/2 mouse device common for all mice
>> [ 1.380672] sdhci: Secure Digital Host Controller Interface driver
>> [ 1.399242] sdhci: Copyright(c) Pierre Ossman
>> [ 1.412215] mmc0: no vmmc regulator found
>> [ 1.424406] sdhci_set_power:mmc0: power = 00000000
>> [ 1.438778] mmc0: SDHCI controller on MMC [sdhci-pxa.2] using ADMA
>> [ 1.457200] sdhci_set_power:mmc0: power = 00200000
>> [ 1.471542] mmc1: no vmmc regulator found
>> [ 1.483715] sdhci_set_power:mmc1: power = 00000000
>> [ 1.498030] sdhci_set_power:mmc0: power = 00200000
>> [ 1.513088] mmc1: SDHCI controller on MMC [sdhci-pxa.0] using ADMA
>> [ 1.531472] sdhci_set_power:mmc0: power = 00200000
>> [ 1.545753] mmc2: no vmmc regulator found
>> [ 1.557943] sdhci_set_power:mmc2: power = 00000000
>> [ 1.572204] sdhci_set_power:mmc0: power = 00200000
>> [ 1.587505] mmc2: SDHCI controller on MMC [sdhci-pxa.1] using ADMA
>> [ 1.605918] sdhci_set_power:mmc0: power = 00200000
>> [ 1.622197] TCP cubic registered
>> [ 1.632049] NET: Registered protocol family 17
>> [ 1.645356] Registering the dns_resolver key type
>> [ 1.659409] VFP support v0.3: implementor 56 architecture 2 part 20 variant 9 rev 5
>> [ 1.682583] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
>> [ 1.701636] Waiting 15sec before mounting root device...
>> [ 1.718121] sdhci_set_power:mmc0: power = 00000000
>> [ 1.732404] sdhci_set_power:mmc0: power = 00000080
>> [ 1.758997] sdhci_set_power:mmc0: power = 00000080
>> [ 1.788946] sdhci_set_power:mmc0: power = 00000080
>> [ 1.804346] sdhci_set_power:mmc0: power = 00000080
>> [ 1.840050] sdhci_set_power:mmc0: power = 00000080
>> [ 1.867346] sdhci_set_power:mmc0: power = 00000080
>> [ 1.881618] sdhci_set_power:mmc0: power = 00000080
>> [ 1.896694] sdhci_set_power:mmc0: power = 00000080
>> [ 11.928938] mmc0: Timeout waiting for hardware interrupt.
>> [ 11.928938] sdhci: =========== REGISTER DUMP (mmc0)===========
>> [ 11.944969] sdhci: Sys addr: 0x00000000 | Version: 0x00000002
>> [ 11.979601] sdhci: Blk size: 0x00007008 | Blk cnt: 0x00000000
>> [ 11.979601] sdhci: Argument: 0x00000000 | Trn mode: 0x00000003
>> [ 11.996918] sdhci: Present: 0x01fa0000 | Host ctl: 0x00000035
>> [ 12.031551] sdhci: Power: 0x0000000b | Blk gap: 0x00000000
>> [ 12.031551] sdhci: Wake-up: 0x00000000 | Clock: 0x00000207
>> [ 12.048867] sdhci: Timeout: 0x0000000e | Int stat: 0x00000000
>> [ 12.066185] sdhci: Int enab: 0x02ff000b | Sig enab: 0x02ff000b
>> [ 12.083502] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
>> [ 12.100818] sdhci: Caps: 0x25fcc8b2 | Caps_1: 0x00002f77
>> [ 12.118137] sdhci: Cmd: 0x0000133a | Max curr: 0x00000000
>> [ 12.152770] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x1f943808
>> [ 12.170085] sdhci: ===========================================
>> [ 12.187575] sdhci_set_power:mmc0: power = 00000080
>> [ 12.201880] mmc0: new high speed MMC card at address 0001
>> [ 12.218242] mmcblk0: mmc0:0001 SEM08G 7.39 GiB
>> [ 12.236802] mmcblk0: p1
>> [ 12.244539] sdhci_set_power:mmc0: power = 00000080
>> [ 16.722250] EXT3-fs: barriers not enabled
>> [ 16.761481] EXT3-fs (mmcblk0p1):
>> [ 16.770850] kjournald starting. Commit interval 5 seconds
>> [ 16.787682] warning: mounting unchecked fs, running e2fsck is recommended
>> [ 16.809039] EXT3-fs (mmcblk0p1): using internal journal
>> [ 16.824079] EXT3-fs (mmcblk0p1): recovery complete
>> [ 16.839879] EXT3-fs (mmcblk0p1): mounted filesystem with ordered data mode
>> [ 16.859865] VFS: Mounted root (ext3 filesystem) on device 179:1.
>> [ 16.878365] Freeing init memory: 92K
>> init started: BusyBox v1.01 (2009.03.10-14:28+0000) multi-call binary
>> telnetd: daemon: No such file or directory
>> cannot open /dev/null
>> [ 17.221024] udevd (56): /proc/56/oom_adj is deprecated, please use /proc/56/oom_score_adj instead.
>> cannot open /dev/null
>> modprobe: could not parse modules.dep
>>
>> error initializing udevd socket
>> cannot open /dev/null
>> error initializing udevd socket
>> cannot open /dev/null
>> error initializing udevd socket
>> modprobe: could not parse modules.dep
>>
>
> The patch is tested on latest mmc-next, with sdhci-pxa interface,
> clk_delay=0x1f.
> The latest git log is.
> mmc: sdhci: Enable bus-width test for JMicron controllers.
>
> How about sending you patches used locally.
>
> Thanks
changed clk_delay from 15 to 31. in brownstone.c was the solution.
clk_delay = 31
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