Cfi can't probe the flash(am29lv320db)

Wed Jul 6 01:57:15 EDT 2005

hi,
I have found the point which was caused by the 'cfi->device_type'. I
am using the 16bit flash, but the 8bit  device type is default. I
changed the 'cfi->device_type' value and it has work well.

Thank again.

2005/7/5, Koen Martens <gmc at sonologic.nl>:
> Hi,
> 
> I had something similar happening, with some broken chip. The problem
> was that the chip reported (through CFI) that it was 2mbyte, whereas in
> reality it was only 512kbytes (which was also the size of the mapping of
> the chip's address space in the linux address space). If this happens,
> the cfi probe routine skips certain initialisations, most notably the
> base offset and the wakeup queue are not initialized properly. The chip
> is registered nonetheles..
> 
> Result: as soon as I accessed the flash -> kernel panic.
> 
> Just my 2 cents..
> 
> Koen
> 
> red dot wrote:
> > If i use "map_rom" to probe the flash, the kernel can run normally.
> > When i probe it with "cfi_probe", it can be found.
> >
> > Following the messages:
> >
> > CPU: ARM720T [41807202] revision 2 (ARMv4T)
> > Machine: Hynix HMS30C7202
> > Warning: bad configuration page, trying to continue
> > Memory policy: ECC disabled, Data cache writeback
> > Built 1 zonelists
> > Kernel command line: console=ttyS2,57600 mem=8M rootfstype=romfs
> > root=/dev/mtdblock2 ro
> > Trying to install chained handler for IRQ16
> > PID hash table entries: 64 (order: 6, 1024 bytes)
> > Console: colour dummy device 80x30
> > Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)
> > Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)
> > Memory: 8MB = 8MB total
> > Memory: 6784KB available (991K code, 237K data, 52K init)
> > Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
> > CPU: Testing write buffer coherency: ok
> > Linux NoNET1.0 for Linux 2.6
> > NetWinder Floating Point Emulator V0.97 (double precision)
> > JFFS2 version 2.2. (C) 2001-2003 Red Hat, Inc.
> > Initializing Cryptographic API
> > h720x Framebuffer driver
> > h720xfb_init_fbinfo
> > h720xfb_set_par
> > var: xres=320 hslen=4 lm=0 rm=0
> > var: yres=240 vslen=0 um=0 bm=0
> > h720xfb_check_var
> > var->bits_per_pixel=4
> > RGBT length = 8:8:8:0
> > RGBT offset = 0:0:0:0
> > h7202 PS/2 port driver
> > Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled
> > ttyS0 at MMIO 0x0 (irq = 8) is a 16550A
> > ttyS1 at MMIO 0x0 (irq = 9) is a 16550A
> > ttyS2 at MMIO 0x0 (irq = 10) is a 16550A
> > ttyS3 at MMIO 0x0 (irq = 11) is a 16550A
> > Using anticipatory io scheduler
> > H720x remap virt=c1080000
> > H720x-MTD probing 16bit FLASH
> > file:drivers/mtd/chips/cfi_probe.c line:70 base=0
> > file:drivers/mtd/chips/cfi_probe.c line:86
> > file:drivers/mtd/chips/cfi_probe.c line:88
> > Unable to handle kernel paging request at virtual address c1080055
> > pgd = c0004000
> > [c1080055] *pgd=4019f031, *pte=000000a3, *ppte=00000552
> > Internal error: Oops: 1a00081f [#1]
> > Modules linked in:
> > CPU: 0
> > PC is at cfi_probe_chip+0x2c8/0x10d8
> > LR is at cfi_probe_chip+0x248/0x10d8
> > pc : [<c00ead84>]    lr : [<c00ead04>]    Not tainted
> > sp : c01a3eb0  ip : 00000000  fp : c01a3f34
> > r10: 00000000  r9 : 00000055  r8 : c01a3f3c
> > r7 : 00000002  r6 : c0122d38  r5 : 00000001  r4 : 00000002
> > r3 : c1080000  r2 : 00000098  r1 : 00000002  r0 : 00000001
> > Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  Segment kernel
> > Control: 217F  Table: 4000401D  DAC: 0000001D
> > Process swapper (pid: 1, stack limit = 0xc01a2190)
> > Stack: (0xc01a3eb0 to 0xc01a4000)
> > 3ea0:                                     0000001e c01a3f34 c01a3ec4 c0016ac0
> > 3ec0: c0017c38 00000000 0000000d 00000000 00000020 c0147920 00002702 00000020
> > 3ee0: c013c930 00000003 00000000 0000001e c01a3f34 00000002 c01a3f0c c01a3f34
> > 3f00: 00000098 000000ff 000000f0 00000001 00000002 00000000 c0014d38 c0122d38
> > 3f20: c01a3f3c c0122c9c c01a3f9c c01a3f38 c00f06c8 c00eaacc 00000763 00000000
> > 3f40: 00000000 00000001 00000001 00000000 00000000 00000000 00000000 00000000
> > 3f60: 00000000 00000000 00000000 00000000 00000000 c0122c84 c010b284 c0122d38
> > 3f80: c0014d38 00000000 00000000 00000000 c01a3fb8 c01a3fa0 c00ea6f8 c00f0658
> > 3fa0: c0122d38 c01a2000 00000000 c01a3fd4 c01a3fbc c00135dc c00ea6b0 c0014d1c
> > 3fc0: c01a2000 00000000 c01a3ff4 c01a3fd8 c00150e0 c001355c 00000000 00000000
> > 3fe0: 00000000 00000000 00000000 c01a3ff8 c002b030 c0015064 00000000 00000000
> > Backtrace:
> > [<c00eaabc>] (cfi_probe_chip+0x0/0x10d8) from [<c00f06c8>]
> > (mtd_do_chip_probe+0x80/0x304)
> > [<c00f0648>] (mtd_do_chip_probe+0x0/0x304) from [<c00ea6f8>]
> > (do_map_probe+0x58/0xa0)
> > [<c00ea6a0>] (do_map_probe+0x0/0xa0) from [<c00135dc>]
> > (h720x_mtd_init+0x90/0x164)
> >  r6 = 00000000  r5 = C01A2000  r4 = C0122D38
> > [<c001354c>] (h720x_mtd_init+0x0/0x164) from [<c00150e0>] (init+0x8c/0x1c8)
> >  r6 = 00000000  r5 = C01A2000  r4 = C0014D1C
> > [<c0015054>] (init+0x0/0x1c8) from [<c002b030>] (do_exit+0x0/0xae4)
> >  r7 = 00000000  r6 = 00000000  r5 = 00000000  r4 = 00000000
> > Code: 07c32009 0a000006 e3530002 0596300c (018320b9)
> >  <0>Kernel panic - not syncing: Attempted to kill init!
> >
> > The kernel is broken at cfi_send_gen_cmd(0x98, 0x55, base, map, cfi,
> > cfi->device_type, NULL).
> 
> --
> K.F.J. Martens, Sonologic, http://www.sonologic.nl/
> Networking, hosting, embedded systems, unix, artificial intelligence.
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