Message-Id: <201202292121.58411.me@danielpalmer.co.uk>
Date:	Wed, 29 Feb 2012 21:21:58 +0900
From:	Daniel Palmer <me@...ielpalmer.co.uk>
To:	linux-kernel@...r.kernel.org
Cc:	nicolas.ferre@...el.com
Subject: at91: SAM9G45 doesn't seem to register HDMAC controller anymore

Hi,

I posted this on the linux-mmc list a few days ago: 

http://permalink.gmane.org/gmane.linux.kernel.mmc/13014 (oops is include below 
too)

The atmel-mmc driver oops when it's using PIO for transfers and the reason 
it's using PIO seems to be that the HDMAC isn't getting registered so the DMA 
channels aren't available.

I have a board file which is based on arch/arm/mach-at91/board-sam9m10g45ek.c 
with some minor differences. I also have some small changes to the mainline for 
the memory configuration on the board,.. but taking that out doesn't fix the 
issue.

>From what I gather by reading the LKML backlog is that a lot of stuff was 
changed to work out what hardware is available via device tree. I don't have 
the device tree option enabled and I don't need it either. My guess is that's 
what is stopping the HDMAC from getting registered.

Has anyone tested the changes without the device stuff enabled?

Please CC me as I'm not subscribed.

Cheers,

Daniel 

-- pico-SAM9G45 Bootstrap 3.0.1 --
-- AT91SAM9G45-EK
-- Compiled: Oct 17 2011 22:42:24 --
-I- RTC Config: rcen: 0 osc32en: 1 osc32byp: 0 oscsel: 1
-I- RTC Config: rcen: 0 osc32en: 1 osc32byp: 0 oscsel: 1
-I- Setting: MCK = 133MHz
-I- Init DDRAM
-I- Init second bank SDRAM
-I- Loading to 0x20000000
-I- MEDSdcard init
-I- DMAD_Initialize channel 0  
-I- Card Type 1, CSD_STRUCTURE 0
-I- SD/MMC TRANS SPEED 25000 KBit/s
-I- SD 4-BITS BUS
-I- CMD6(1) arg 0x80FFFF01
-I- SD HS Enable
-I- SD/MMC TRANS SPEED 50000 KBit/s
-I- SD/MMC card initialization successful
-I- Card size: 1886 MB
-I- Copy "linux.bin" from SdCard to 0x20000000
-I- load: 20008000 jump: 20008000
-I- Loading to 0x20007fc0 with size 0x0014f4b0
-I- MEDSdcard init
-I- DMAD_Initialize channel 0  
-I- Card Type 1, CSD_STRUCTURE 0
-I- SD/MMC TRANS SPEED 25000 KBit/s
-I- SD 4-BITS BUS
-I- CMD6(1) arg 0x80FFFF01
-I- SD HS Enable
-I- SD/MMC TRANS SPEED 50000 KBit/s
-I- SD/MMC card initialization successful
-I- Card size: 1886 MB
-I- Copy "linux.bin" from SdCard to 0x20007fc0
-I- Modified jump to 0x20008000
Uncompressing Linux... done, booting the kernel.
[    0.000000] Booting Linux on physical CPU 0
[    0.000000] Linux version 3.3.0-rc5dgp-8be930a+ (jenkins <at> ein) (gcc 
version 
4.6.2 (Debian 4.6.2-15) ) #3 Sun Feb 26 23:59:14 JST 2012
[    0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
[    0.000000] CPU: VIVT data cache, VIVT instruction cache
[    0.000000] Machine: Mini Box picoSAM9 G45 Board
[    0.000000] Memory policy: ECC disabled, Data cache writeback
[    0.000000] AT91: Detected soc type: at91sam9g45
[    0.000000] AT91: Detected soc subtype: Unknown
[    0.000000] AT91: sram at 0x300000 of 0x10000 mapped at 0xfef68000
[    0.000000] Clocks: CPU 400 MHz, master 133 MHz, main 12.000 MHz
[    0.000000] gpiochip_add: registered GPIOs 0 to 31 on device: pioA
[    0.000000] gpiochip_add: registered GPIOs 32 to 63 on device: pioB
[    0.000000] gpiochip_add: registered GPIOs 64 to 95 on device: pioC
[    0.000000] gpiochip_add: registered GPIOs 96 to 127 on device: pioD
[    0.000000] gpiochip_add: registered GPIOs 128 to 159 on device: pioE
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total 
pages: 62368
[    0.000000] Kernel command line: mem=128M <at> 0x20000000 mem=128M <at> 
0x70000000 
console=ttyS0,115200 console=tty0 root=/dev/mmcblk0p2 rw rootdelay=1 
rootwait=1
[    0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[    0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[    0.000000] Memory: 128MB 128MB = 256MB total
[    0.000000] Memory: 256844k/256844k available, 5300k 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]     vmalloc : 0xd0800000 - 0xff000000   ( 744 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xd0000000   ( 256 MB)
[    0.000000]     modules : 0xbf000000 - 0xc0000000   (  16 MB)
[    0.000000]       .text : 0xc0008000 - 0xc025ac44   (2380 kB)
[    0.000000]       .init : 0xc025b000 - 0xc0275000   ( 104 kB)
[    0.000000]       .data : 0xc0276000 - 0xc0292a40   ( 115 kB)
[    0.000000]        .bss : 0xc0292a64 - 0xc02a598c   (  76 kB)
[    0.000000] NR_IRQS:192
[    0.000000] AT91: 160 gpio irqs in 5 banks
[    0.000000] Console: colour dummy device 80x30
[    0.000000] console [tty0] enabled
[    0.000000] Calibrating delay loop... 199.06 BogoMIPS (lpj=995328)
[    0.070000] pid_max: default: 32768 minimum: 301
[    0.070000] Mount-cache hash table entries: 512
[    0.070000] CPU: Testing write buffer coherency: ok
[    0.080000] Setting up static identity map for 0x201fa8c0 - 0x201fa8fc
[    0.140000] NET: Registered protocol family 16
[    0.210000] AT91: Power Management
[    0.210000] AT91: Starting after power-restored wakeup
[    0.280000] bio: create slab <bio-0> at 0
[    0.310000] Switching to clocksource tcb_clksrc
[    0.480000] NET: Registered protocol family 2
[    0.480000] IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.490000] TCP established hash table entries: 8192 (order: 4, 65536 
bytes)
[    0.490000] TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
[    0.490000] TCP: Hash tables configured (established 8192 bind 8192)
[    0.490000] TCP reno registered
[    0.490000] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.490000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.510000] msgmni has been set to 501
[    0.510000] io scheduler noop registered
[    0.510000] io scheduler cfq registered (default)
[    0.530000] atmel_lcdfb atmel_lcdfb.0: 255KiB frame buffer at 76f80000 
(mapped at ffdc0000)
[    0.880000] Console: switching to colour frame buffer device 60x34
[    1.060000] atmel_lcdfb atmel_lcdfb.0: fb0: Atmel LCDC at 0x00500000 
(mapped at d0806000), irq 23
[    1.060000] atmel_usart.0: ttyS0 at MMIO 0xffffee00 (irq = 1) is a 
ATMEL_SERIAL
[    1.420000] console [ttyS0] enabled
[    1.430000] atmel_usart.1: ttyS1 at MMIO 0xfff8c000 (irq = 7) is a 
ATMEL_SERIAL
[    1.440000] atmel_usart.2: ttyS2 at MMIO 0xfff90000 (irq = 8) is a 
ATMEL_SERIAL
[    1.460000] atmel_usart.3: ttyS3 at MMIO 0xfff94000 (irq = 9) is a 
ATMEL_SERIAL
[    1.480000] atmel_spi atmel_spi.0: Atmel SPI Controller at 0xfffa4000 (irq 
14)
[    1.500000] atmel_spi atmel_spi.1: Atmel SPI Controller at 0xfffa8000 (irq 
15)
[    1.510000] atmel_tsadcc atmel_tsadcc: Master clock is set at: 133333333 Hz
[    1.530000] atmel_tsadcc atmel_tsadcc: Prescaler is set at: 221
[    1.540000] input: atmel touch screen controller as 
/devices/platform/atmel_tsadcc/input/input0
[    1.560000] rtc-at91sam9 at91_rtt.0: rtc core: registered at91_rtt as rtc0
[    1.580000] cpuidle: using governor ladder
[    1.590000] cpuidle: using governor menu
[    1.610000] TCP cubic registered
[    1.620000] Registering the dns_resolver key type
[    1.630000] VFP support v0.3: not present
[    1.640000] rtc-at91sam9 at91_rtt.0: setting system clock to 2012-02-26 
23:44:40 UTC (1330299880)
[    1.660000] atmel_mci atmel_mci.0: version: 0x410
[    1.660000] atmel_mci atmel_mci.0: using DMA
[    1.670000] atmel_mci atmel_mci.0: DMA not available, using PIO
[    1.680000] atmel_mci atmel_mci.0: Atmel MCI controller at 0xfff80000 irq 
11, 1 slots
[    1.700000] atmel_mci atmel_mci.1: version: 0x410
[    1.710000] atmel_mci atmel_mci.1: using DMA
[    1.710000] atmel_mci atmel_mci.1: DMA not available, using PIO
[    1.730000] atmel_mci atmel_mci.1: Atmel MCI controller at 0xfffd0000 irq 
29, 1 slots
[    1.740000] Waiting 1sec before mounting root device...
[    1.790000] Unable to handle kernel NULL pointer dereference at virtual 
address 00000004
[    1.790000] pgd = c0004000
[    1.790000] [00000004] *pgd=00000000
[    1.790000] Internal error: Oops - BUG: 5 [#1]
[    1.790000] Modules linked in:
[    1.790000] CPU: 0    Not tainted  (3.3.0-rc5dgp-8be930a+ #3)
[    1.790000] pc : [<c01794fc>]    lr : [<c0179b38>]    psr: 20000093
[    1.790000] sp : cf8c7d34  ip : 00010200  fp : c0600020
[    1.790000] r10: c02822c4  r9 : c029e908  r8 : c0600006
[    1.790000] r7 : 00000000  r6 : 04000024  r5 : 00000000  r4 : ce995f40
[    1.790000] r3 : c02978e0  r2 : c027f8a8  r1 : c0000000  r0 : ce995f40
[    1.790000] Flags: nzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment 
kernel
[    1.790000] Control: 0005317f  Table: 20004000  DAC: 00000017
[    1.790000] Process kworker/u:0 (pid: 5, stack limit = 0xcf8c6270)
[    1.790000] Stack: (0xcf8c7d34 to 0xcf8c8000)
[    1.790000] 7d20:                                              ce995f40 
04000024 04000024
[    1.790000] 7d40: 00000000 c0600006 c029de4c c02822c4 c0600020 c0179b38 
c02812c0 ce995f78
[    1.790000] 7d60: cf8c1d90 ce86c8a0 0000000b 00000000 00000000 0000000b 
c029de4c c02822c4
[    1.790000] 7d80: 00000001 c004cb38 00060000 c02822c4 0000000b 00000000 
cf8c7e0c 00000000
[    1.790000] 7da0: c016d514 ce997df4 00000012 c004cc8c c02822c4 c004e778 
c02896a8 c004c528
[    1.790000] 7dc0: 000000c0 c000e6ac c0179f48 60000013 fefff000 c000dab8 
00000000 00000000
[    1.790000] 7de0: 0005104d 00000001 ce997c00 ce995f40 cf8c7eb4 00000040 
00000000 c016d514
[    1.790000] 7e00: ce997df4 00000012 00000002 cf8c7e20 c0179de0 c0179f48 
60000013 ffffffff
[    1.790000] 7e20: cf8c7eb4 ce997c00 cf8c7ec4 c016b910 cf8c7eb4 ce997c00 
cf8c7e84 c016ba50
[    1.790000] 7e40: 0000000d ce9c3c00 0000000d c01726a0 ce978fe0 0000000d 
00000000 00000000
[    1.790000] 7e60: 00000000 00000000 00000000 000001b5 00000000 ffffff8d 
00000000 cf8c7e84
[    1.790000] 7e80: cf8c7eb4 05f5e100 00000000 00000040 00000001 ffffff8d 
00000200 00000000
[    1.790000] 7ea0: 00000000 cf8c7eb4 00000001 cf8c7ed4 00000000 00000000 
cf8c7e54 cf8c7e84
[    1.790000] 7ec0: 00000000 00000000 cf8c7ec8 cf8c7ec8 c016b844 87654321 
c04b0f32 00000660
[    1.790000] 7ee0: 00000040 00000000 00000008 ce86c660 ce9c3c00 00000000 
ce9c3c00 c0171530
[    1.790000] 7f00: ce997c00 ce9c3c00 00000000 c01719dc 00000000 ce997c00 
cf8c7f24 c0171b14
[    1.790000] 7f20: 000000e1 03534453 55303247 80a108b4 6700abed 80ff8000 
ce997c00 00000000
[    1.790000] 7f40: c020e800 00061a80 c020e80c c0171dac 00061a80 00ff8000 
c016d514 ce997c00
[    1.790000] 7f60: ce997c00 c016d0c0 ce997df4 c016d6b0 cf802ce0 cf16de00 
cf8c6000 00000000
[    1.790000] 7f80: 00000000 c002d694 ce997df4 cf802ce0 c0298aac c0298aa8 
c0280d0c cf8c6000
[    1.790000] 7fa0: 00000000 cf802cf0 00000000 c002e100 00000000 cf88df38 
cf802ce0 c002dfc0
[    1.790000] 7fc0: 00000013 00000000 00000000 c00315fc 00000000 00000000 
cf802ce0 00000000
[    1.790000] 7fe0: cf8c7fe0 cf8c7fe0 cf88df38 c0031578 c000e7a4 c000e7a4 
aaaaaaaa aaaaaaaa
[    1.790000] Function entered at [<c01794fc>] from [<0000000b>]
[    1.790000] Code: e92d4ff0 e59f9378 e5905004 e5991000 (e5952004) 
[    1.790000] ---[ end trace 0cf742e69e15cd43 ]---
[    1.790000] Kernel panic - not syncing: Fatal exception in interrupt
--
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