* [BUG] CMD52 sent as first command not CMD0
@ 2011-02-04 22:53 Philip Rakity
2011-02-04 23:19 ` Philip Rakity
2011-02-06 0:38 ` Chris Ball
0 siblings, 2 replies; 13+ messages in thread
From: Philip Rakity @ 2011-02-04 22:53 UTC (permalink / raw)
To: linux-mmc
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
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-04 22:53 [BUG] CMD52 sent as first command not CMD0 Philip Rakity
@ 2011-02-04 23:19 ` Philip Rakity
2011-02-06 0:38 ` Chris Ball
1 sibling, 0 replies; 13+ messages in thread
From: Philip Rakity @ 2011-02-04 23:19 UTC (permalink / raw)
To: linux-mmc; +Cc: Nicolas Pitre
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@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-04 22:53 [BUG] CMD52 sent as first command not CMD0 Philip Rakity
2011-02-04 23:19 ` Philip Rakity
@ 2011-02-06 0:38 ` Chris Ball
2011-02-06 0:52 ` Philip Rakity
1 sibling, 1 reply; 13+ messages in thread
From: Chris Ball @ 2011-02-06 0:38 UTC (permalink / raw)
To: Philip Rakity; +Cc: linux-mmc, Albert Herranz
Hi Philip,
On Fri, Feb 04, 2011 at 02:53:59PM -0800, Philip Rakity wrote:
> using mmc-next -- NO changes -- last checkin was from linux Jan 26
[..]
> [ 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
This looks to be intentional, and dates back to:
commit 516a82422209e078345d0ca54b16793d7bfd4782
Author: Albert Herranz <albert_herranz@yahoo.es>
Date: Wed Mar 10 15:20:37 2010 -0800
sdio: recognize io card without powercycle
SDIO Simplified Specification V2.00 states that it is strongly recommended
that the host executes either a power reset or issues a CMD52 (I/O Reset)
to re-initialize an I/O only card or the I/O portion of a combo card.
Additionally, the CMD52 must be issued first because it cannot be issued
after a CMD0.
With this patch the Nintendo Wii SDIO-based WLAN card is detected after a
system reset, without requiring a complete system powercycle.
Are you seeing any negative effects from running the CMD52 before CMD0?
Thanks,
--
Chris Ball <cjb@laptop.org> <http://printf.net/>
One Laptop Per Child
^ permalink raw reply [flat|nested] 13+ messages in thread* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 0:38 ` Chris Ball
@ 2011-02-06 0:52 ` Philip Rakity
2011-02-06 1:11 ` Philip Rakity
` (2 more replies)
0 siblings, 3 replies; 13+ messages in thread
From: Philip Rakity @ 2011-02-06 0:52 UTC (permalink / raw)
To: Chris Ball; +Cc: linux-mmc, Albert Herranz
nothing negative but reset is meant to reinit the card. This is the power up sequence for the 1st time a card is detected.
There is no reason to do this if no card has yet enumerated. If a sdio card was there I completely agree with the mod since we need to reset
the card.
CMD0 should be the 1st command on an initial power up sequence. Does my code suggestion work for you ?
On Feb 5, 2011, at 4:38 PM, Chris Ball wrote:
> Hi Philip,
>
> On Fri, Feb 04, 2011 at 02:53:59PM -0800, Philip Rakity wrote:
>> using mmc-next -- NO changes -- last checkin was from linux Jan 26
> [..]
>> [ 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
>
> This looks to be intentional, and dates back to:
>
> commit 516a82422209e078345d0ca54b16793d7bfd4782
> Author: Albert Herranz <albert_herranz@yahoo.es>
> Date: Wed Mar 10 15:20:37 2010 -0800
>
> sdio: recognize io card without powercycle
>
> SDIO Simplified Specification V2.00 states that it is strongly recommended
> that the host executes either a power reset or issues a CMD52 (I/O Reset)
> to re-initialize an I/O only card or the I/O portion of a combo card.
> Additionally, the CMD52 must be issued first because it cannot be issued
> after a CMD0.
>
> With this patch the Nintendo Wii SDIO-based WLAN card is detected after a
> system reset, without requiring a complete system powercycle.
>
> Are you seeing any negative effects from running the CMD52 before CMD0?
>
> Thanks,
>
> --
> Chris Ball <cjb@laptop.org> <http://printf.net/>
> One Laptop Per Child
^ permalink raw reply [flat|nested] 13+ messages in thread* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 0:52 ` Philip Rakity
@ 2011-02-06 1:11 ` Philip Rakity
2011-02-06 1:15 ` Chris Ball
2011-02-06 16:09 ` Tardy, Pierre
2 siblings, 0 replies; 13+ messages in thread
From: Philip Rakity @ 2011-02-06 1:11 UTC (permalink / raw)
To: Albert Herranz, Chris Ball; +Cc: linux-mmc
The CMD52 was sent to a eMMC card. Not SDIO. Figure 6.2 in SDIO spec 2.0 -- clearly shows that the card needs to exist before cmd52 (reset) is legal.
Probably need to extend the proposed change to check card type to ensure only done for sdio.
On Feb 5, 2011, at 4:52 PM, Philip Rakity wrote:
>
> nothing negative but reset is meant to reinit the card. This is the power up sequence for the 1st time a card is detected.
> There is no reason to do this if no card has yet enumerated. If a sdio card was there I completely agree with the mod since we need to reset
> the card.
>
> CMD0 should be the 1st command on an initial power up sequence. Does my code suggestion work for you ?
>
> On Feb 5, 2011, at 4:38 PM, Chris Ball wrote:
>
>> Hi Philip,
>>
>> On Fri, Feb 04, 2011 at 02:53:59PM -0800, Philip Rakity wrote:
>>> using mmc-next -- NO changes -- last checkin was from linux Jan 26
>> [..]
>>> [ 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
>>
>> This looks to be intentional, and dates back to:
>>
>> commit 516a82422209e078345d0ca54b16793d7bfd4782
>> Author: Albert Herranz <albert_herranz@yahoo.es>
>> Date: Wed Mar 10 15:20:37 2010 -0800
>>
>> sdio: recognize io card without powercycle
>>
>> SDIO Simplified Specification V2.00 states that it is strongly recommended
>> that the host executes either a power reset or issues a CMD52 (I/O Reset)
>> to re-initialize an I/O only card or the I/O portion of a combo card.
>> Additionally, the CMD52 must be issued first because it cannot be issued
>> after a CMD0.
>>
>> With this patch the Nintendo Wii SDIO-based WLAN card is detected after a
>> system reset, without requiring a complete system powercycle.
>>
>> Are you seeing any negative effects from running the CMD52 before CMD0?
>>
>> Thanks,
>>
>> --
>> Chris Ball <cjb@laptop.org> <http://printf.net/>
>> One Laptop Per Child
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 0:52 ` Philip Rakity
2011-02-06 1:11 ` Philip Rakity
@ 2011-02-06 1:15 ` Chris Ball
2011-02-06 1:35 ` Philip Rakity
2011-02-06 16:09 ` Tardy, Pierre
2 siblings, 1 reply; 13+ messages in thread
From: Chris Ball @ 2011-02-06 1:15 UTC (permalink / raw)
To: Philip Rakity; +Cc: linux-mmc, Albert Herranz
On Sat, Feb 05, 2011 at 04:52:12PM -0800, Philip Rakity wrote:
> nothing negative but reset is meant to reinit the card. This is the power up sequence for the 1st time a card is detected.
> There is no reason to do this if no card has yet enumerated. If a sdio card was there I completely agree with the mod since we need to reset
> the card.
>
> CMD0 should be the 1st command on an initial power up sequence. Does my code suggestion work for you ?
Okay -- yes, looks fine. Let's add a comment beforehand; something like:
/* If reinitalizing, we must send CMD52 before CMD0 for SDIO. */
--
Chris Ball <cjb@laptop.org> <http://printf.net/>
One Laptop Per Child
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 1:15 ` Chris Ball
@ 2011-02-06 1:35 ` Philip Rakity
2011-02-06 1:50 ` Chris Ball
2011-02-06 11:13 ` Albert Herranz
0 siblings, 2 replies; 13+ messages in thread
From: Philip Rakity @ 2011-02-06 1:35 UTC (permalink / raw)
To: Chris Ball, Albert Herranz; +Cc: linux-mmc
proposed solution: I cannot verify this fix until Monday.
=====
CMD52 is a reset for SDIO cards. CMD0 is not sufficient when
the card is being re-initialized. Only send CMD52 if
a) doing a reinitialize
b) card is SDIO or SDIO_COMBO
Signed-off-by: Philip Rakity <prakity@marvell.com>
---
drivers/mmc/core/core.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 30d4da4..f0ce6f6 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1521,7 +1521,12 @@ 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);
+
+ /* reset sdio before CMD0 when card is being reinitialized */
+ if (host->card &&
+ (host->card->type == MMC_TYPE_SDIO ||
+ host->card->type == MMC_TYPE_SD_COMBO))
+ sdio_reset(host);
mmc_go_idle(host);
mmc_hwungate_clock(host);
--
1.7.0.4
On Feb 5, 2011, at 5:15 PM, Chris Ball wrote:
> On Sat, Feb 05, 2011 at 04:52:12PM -0800, Philip Rakity wrote:
>> nothing negative but reset is meant to reinit the card. This is the power up sequence for the 1st time a card is detected.
>> There is no reason to do this if no card has yet enumerated. If a sdio card was there I completely agree with the mod since we need to reset
>> the card.
>>
>> CMD0 should be the 1st command on an initial power up sequence. Does my code suggestion work for you ?
>
> Okay -- yes, looks fine. Let's add a comment beforehand; something like:
>
> /* If reinitalizing, we must send CMD52 before CMD0 for SDIO. */
>
> --
> Chris Ball <cjb@laptop.org> <http://printf.net/>
> One Laptop Per Child
^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 1:35 ` Philip Rakity
@ 2011-02-06 1:50 ` Chris Ball
2011-02-06 16:02 ` David Vrabel
2011-02-06 11:13 ` Albert Herranz
1 sibling, 1 reply; 13+ messages in thread
From: Chris Ball @ 2011-02-06 1:50 UTC (permalink / raw)
To: Philip Rakity; +Cc: Albert Herranz, linux-mmc
Hi,
On Sat, Feb 05, 2011 at 05:35:46PM -0800, Philip Rakity wrote:
>
> proposed solution: I cannot verify this fix until Monday.
> =====
>
> CMD52 is a reset for SDIO cards. CMD0 is not sufficient when
> the card is being re-initialized. Only send CMD52 if
> a) doing a reinitialize
> b) card is SDIO or SDIO_COMBO
>
> Signed-off-by: Philip Rakity <prakity@marvell.com>
> ---
> drivers/mmc/core/core.c | 7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 30d4da4..f0ce6f6 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1521,7 +1521,12 @@ 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);
> +
> + /* reset sdio before CMD0 when card is being reinitialized */
> + if (host->card &&
> + (host->card->type == MMC_TYPE_SDIO ||
> + host->card->type == MMC_TYPE_SD_COMBO))
> + sdio_reset(host);
> mmc_go_idle(host);
> mmc_hwungate_clock(host);
>
Thanks. We have macros for this, but need to add one for combo cards.
include/linux/mmc/card.h should get:
#define mmc_card_sd_combo(c) ((c)->type == MMC_TYPE_SD_COMBO)
and then:
/* reset sdio before CMD0 when card is being reinitialized */
if (host->card && (mmc_card_sdio(host->card) ||
mmc_card_sd_combo(host->card)))
sdio_reset(host);
(FYI your hwgate patches are applied above but aren't in mainline yet.)
--
Chris Ball <cjb@laptop.org> <http://printf.net/>
One Laptop Per Child
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 1:50 ` Chris Ball
@ 2011-02-06 16:02 ` David Vrabel
0 siblings, 0 replies; 13+ messages in thread
From: David Vrabel @ 2011-02-06 16:02 UTC (permalink / raw)
To: Chris Ball; +Cc: Philip Rakity, Albert Herranz, linux-mmc
On 06/02/2011 01:50, Chris Ball wrote:
>
>
> Thanks. We have macros for this, but need to add one for combo cards.
> include/linux/mmc/card.h should get:
>
> #define mmc_card_sd_combo(c) ((c)->type == MMC_TYPE_SD_COMBO)
How about something like:
#define mmc_card_has_sdio(c) \
({ \
struct mmc_card *__card = (c); \
mmc_card_sdio(__card) && mmc_card_sd_combo(__card); \
})
And similarly
#define mmc_card_has_sd(c) ...
David
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 1:35 ` Philip Rakity
2011-02-06 1:50 ` Chris Ball
@ 2011-02-06 11:13 ` Albert Herranz
2011-02-06 20:50 ` Philip Rakity
1 sibling, 1 reply; 13+ messages in thread
From: Albert Herranz @ 2011-02-06 11:13 UTC (permalink / raw)
To: Philip Rakity; +Cc: Chris Ball, linux-mmc
Hi,
On 02/06/2011 02:35 AM, Philip Rakity wrote:
>
> proposed solution: I cannot verify this fix until Monday.
> =====
>
> CMD52 is a reset for SDIO cards. CMD0 is not sufficient when
> the card is being re-initialized. Only send CMD52 if
> a) doing a reinitialize
> b) card is SDIO or SDIO_COMBO
>
> Signed-off-by: Philip Rakity <prakity@marvell.com>
> ---
> drivers/mmc/core/core.c | 7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 30d4da4..f0ce6f6 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1521,7 +1521,12 @@ 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);
> +
> + /* reset sdio before CMD0 when card is being reinitialized */
> + if (host->card &&
> + (host->card->type == MMC_TYPE_SDIO ||
> + host->card->type == MMC_TYPE_SD_COMBO))
> + sdio_reset(host);
> mmc_go_idle(host);
> mmc_hwungate_clock(host);
>
At least on the Nintendo Wii, a platform reset _does not_ reset the SDIO hardware, and there is no known way to power-off/power-on it.
So, in some cases like after a system reboot, we need to issue a CMD52 before a CMD0 (even if on that particular case host->card is NULL) to properly reset the Nintendo Wii SDIO-based Wireless LAN card from its previous state, otherwise the card is not detected.
The proposed fix breaks this and makes the card unavailable after a system reboot.
If you are concerned about unconditionally issuing a CMD52 then we can use a quirk to make sure that we always perform a SDIO reset at least for the Nintendo Wii.
Cheers,
Albert
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 11:13 ` Albert Herranz
@ 2011-02-06 20:50 ` Philip Rakity
2011-02-07 0:55 ` Nicolas Pitre
0 siblings, 1 reply; 13+ messages in thread
From: Philip Rakity @ 2011-02-06 20:50 UTC (permalink / raw)
To: Albert Herranz; +Cc: Chris Ball, linux-mmc
On Feb 6, 2011, at 3:13 AM, Albert Herranz wrote:
> Hi,
>
> On 02/06/2011 02:35 AM, Philip Rakity wrote:
>>
>> proposed solution: I cannot verify this fix until Monday.
>> =====
>>
>> CMD52 is a reset for SDIO cards. CMD0 is not sufficient when
>> the card is being re-initialized. Only send CMD52 if
>> a) doing a reinitialize
>> b) card is SDIO or SDIO_COMBO
>>
>> Signed-off-by: Philip Rakity <prakity@marvell.com>
>> ---
>> drivers/mmc/core/core.c | 7 ++++++-
>> 1 files changed, 6 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
>> index 30d4da4..f0ce6f6 100644
>> --- a/drivers/mmc/core/core.c
>> +++ b/drivers/mmc/core/core.c
>> @@ -1521,7 +1521,12 @@ 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);
>> +
>> + /* reset sdio before CMD0 when card is being reinitialized */
>> + if (host->card &&
>> + (host->card->type == MMC_TYPE_SDIO ||
>> + host->card->type == MMC_TYPE_SD_COMBO))
>> + sdio_reset(host);
>> mmc_go_idle(host);
>> mmc_hwungate_clock(host);
>>
>
> At least on the Nintendo Wii, a platform reset _does not_ reset the SDIO hardware, and there is no known way to power-off/power-on it.
> So, in some cases like after a system reboot, we need to issue a CMD52 before a CMD0 (even if on that particular case host->card is NULL) to properly reset the Nintendo Wii SDIO-based Wireless LAN card from its previous state, otherwise the card is not detected.
>
> The proposed fix breaks this and makes the card unavailable after a system reboot.
>
> If you are concerned about unconditionally issuing a CMD52 then we can use a quirk to make sure that we always perform a SDIO reset at least for the Nintendo Wii.
Would be happy with either a quirk or comment in the code. Comment seems easiest.
/* sdhci_reset will generate CMD52 to reset card. SD/eMMC cards are ignore this */
or something like that.
>
> Cheers,
> Albert
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [BUG] CMD52 sent as first command not CMD0
2011-02-06 20:50 ` Philip Rakity
@ 2011-02-07 0:55 ` Nicolas Pitre
0 siblings, 0 replies; 13+ messages in thread
From: Nicolas Pitre @ 2011-02-07 0:55 UTC (permalink / raw)
To: Philip Rakity; +Cc: Albert Herranz, Chris Ball, linux-mmc
On Sun, 6 Feb 2011, Philip Rakity wrote:
>
> On Feb 6, 2011, at 3:13 AM, Albert Herranz wrote:
>
> > Hi,
> >
> > On 02/06/2011 02:35 AM, Philip Rakity wrote:
> >>
> >> proposed solution: I cannot verify this fix until Monday.
> >> =====
> >>
> >> CMD52 is a reset for SDIO cards. CMD0 is not sufficient when
> >> the card is being re-initialized. Only send CMD52 if
> >> a) doing a reinitialize
> >> b) card is SDIO or SDIO_COMBO
> >>
> >> Signed-off-by: Philip Rakity <prakity@marvell.com>
> >> ---
> >> drivers/mmc/core/core.c | 7 ++++++-
> >> 1 files changed, 6 insertions(+), 1 deletions(-)
> >>
> >> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> >> index 30d4da4..f0ce6f6 100644
> >> --- a/drivers/mmc/core/core.c
> >> +++ b/drivers/mmc/core/core.c
> >> @@ -1521,7 +1521,12 @@ 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);
> >> +
> >> + /* reset sdio before CMD0 when card is being reinitialized */
> >> + if (host->card &&
> >> + (host->card->type == MMC_TYPE_SDIO ||
> >> + host->card->type == MMC_TYPE_SD_COMBO))
> >> + sdio_reset(host);
> >> mmc_go_idle(host);
> >> mmc_hwungate_clock(host);
> >>
> >
> > At least on the Nintendo Wii, a platform reset _does not_ reset the SDIO hardware, and there is no known way to power-off/power-on it.
> > So, in some cases like after a system reboot, we need to issue a CMD52 before a CMD0 (even if on that particular case host->card is NULL) to properly reset the Nintendo Wii SDIO-based Wireless LAN card from its previous state, otherwise the card is not detected.
> >
> > The proposed fix breaks this and makes the card unavailable after a system reboot.
> >
> > If you are concerned about unconditionally issuing a CMD52 then we can use a quirk to make sure that we always perform a SDIO reset at least for the Nintendo Wii.
>
> Would be happy with either a quirk or comment in the code. Comment seems easiest.
>
> /* sdhci_reset will generate CMD52 to reset card. SD/eMMC cards are ignore this */
>
> or something like that.
Indeed. If always issuing cmd52 doesn't bother other types of cards,
then I'd simply always send it without trying to be too smart. On some
other boards such as the SheevaPlug it is impossible to power off or
reset the card too.
Nicolas
^ permalink raw reply [flat|nested] 13+ messages in thread
* RE: [BUG] CMD52 sent as first command not CMD0
2011-02-06 0:52 ` Philip Rakity
2011-02-06 1:11 ` Philip Rakity
2011-02-06 1:15 ` Chris Ball
@ 2011-02-06 16:09 ` Tardy, Pierre
2 siblings, 0 replies; 13+ messages in thread
From: Tardy, Pierre @ 2011-02-06 16:09 UTC (permalink / raw)
To: Philip Rakity, Chris Ball; +Cc: linux-mmc, Albert Herranz
>
> nothing negative but reset is meant to reinit the card. This is the power up sequence for the 1st
> time a card is detected.
> There is no reason to do this if no card has yet enumerated. If a sdio card was there I completely
> agree with the mod since we need to reset
> the card.
What about using linux as a bootloader, or just using kexec?
The first linux could have initialized the card, and we want to put everything back to known state.
This is a valid reason why you want to make sure to reset the card at the first place.
Regards,
Pierre
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Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris,
92196 Meudon Cedex, France
Registration Number: 302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros
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^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2011-02-07 0:55 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-02-04 22:53 [BUG] CMD52 sent as first command not CMD0 Philip Rakity
2011-02-04 23:19 ` Philip Rakity
2011-02-06 0:38 ` Chris Ball
2011-02-06 0:52 ` Philip Rakity
2011-02-06 1:11 ` Philip Rakity
2011-02-06 1:15 ` Chris Ball
2011-02-06 1:35 ` Philip Rakity
2011-02-06 1:50 ` Chris Ball
2011-02-06 16:02 ` David Vrabel
2011-02-06 11:13 ` Albert Herranz
2011-02-06 20:50 ` Philip Rakity
2011-02-07 0:55 ` Nicolas Pitre
2011-02-06 16:09 ` Tardy, Pierre
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