GSL1680 on A20

[Leonardo]

Hello everybody. I'm having such a hard time trying to get the GSL1680 touch panel working on my A20 device. Actually it's a INET K70 tablet and I would like to replace it's Android for a full Linux distro. Currently I'm booting using a SD card with Cubian (kernel 3.4.79), which is a distro made for Cubieboard, but as they're both A20, it works perfectly. I'm using this driver:

https://groups.google.com/d/topic/linux-sunxi/SZGxiTQcFyY/discussion
https://gitorious.org/gslx680-for-sunxi/gslx680-for-sunxi

It is the most recommended, according to http://linux-sunxi.org/GSL1680#Linux_driver

From the Android's driver I could extract the following firmwares:

• GSL1680D_FW_K70.fw
• GSL1680E_FW_K70.fw
• GSL1680E_FW_K70_GG.fw
• GSL1680E_FW_K70_SG_NSM.fw
• GSL1680E_FW_K702B_PG_GS00.fw
• GSL1680E_FW_K703_PG.fw
• GSL1680E_FW_K70L_PG_YPD.fw
• GSL1680E_FW_K70L_V2.fw
• GSL1680E_FW_K70T_PG.fw
• GSL1680E_FW_K70T_PG_80048.fw
• GSL1688E_FW_K71_GG_102460.fw
• GSL1688E_FW_K71_OGS_10246.fw
• GSL1688E_FW_K71_OGS_80048.fw
• GSL1688E_FW_K71_PG_102460.fw
• GSL1688E_FW_K71_PG_800480.fw
• GSL1688E_FW_K72EW_OGS.fw
• GSL1688E_FW_K72EW_OGS_800.fw
• GSL1688E_FW_K72EW_PG.fw
• GSL1688E_FW_K72EW_PG_8004.fw
• GSL2682A_FW_K70_TOPSUN_OG.fw
• GSL2682B_FW_K790_OGS.fw
• GSL2682B_FW_K790_OGS_QSD.fw
• GSL2682B_FW_K790_PG_C1961.fw
• GSL2682B_FW_K790_PG_V2.fw
• GSL3680_FW_K100_PG_QLT100.fw
• GSL3680_FW_K9701L2B_TOPSU.fw

Since on my chip it's written "GSL1680" and my tablet is a K70, I'm assuming the ones I colored blue are the good ones.

After compiling the driver, I started getting a "gslx680: probe of 2-0040 failed with error -22" error during boot. I got around this one by removing the IRQF_TRIGGER_FALLING flag from source code, as suggested here:

https://groups.google.com/d/msg/linux-sunxi/SZGxiTQcFyY/qAFBsbt_9doJ

It seems to be an A20 issue, as the same patch is required for the FT5x panel (see here).

Now the kernel crashes when I try to boot. Luckily SSH still works, so I am able to disable the module and recover the system. A few times, despite the crash, the desktop loads successfully and I can get the cursor to move, but it's rare. The boot log is bellow. Could anyone help me getting it right?

Thank you.

[  105.001094] ===========================gslx680_ts_init=====================
[  105.003649] _fetch_sysconfig_para.
[  105.007681] gslx680 firmware GSL1680E_FW_K70L_V2.fw.
[  105.016815] _fetch_sysconfig_para: after: ctp_twi_addr is 0x40, dirty_addr_buf: 0x40. dirty_addr_buf[1]: 0xfffe
[  105.020912] _fetch_sysconfig_para: ctp_twi_id is 2.
[  105.025235] _fetch_sysconfig_para: screen_max_x = 1024.
[  105.029424] _fetch_sysconfig_para: screen_max_y = 600.
[  105.033526] _fetch_sysconfig_para: revert_x_flag = 0.
[  105.037662] _fetch_sysconfig_para: revert_y_flag = 0.
[  105.042123] _fetch_sysconfig_para: exchange_x_y_flag = 0.
[  105.046904] _init_platform_resource: tp_io request gpio fail!
[  105.052219] i2c-core: driver [gslx680] using legacy suspend method
[  105.057347] i2c-core: driver [gslx680] using legacy resume method
[  105.059769] incomplete xfer (0x20)
[  105.065004] incomplete xfer (0x20)
[  105.071175] ctp_detect: Detected chip gslx680 at adapter 2, address 0x40
[  105.075078] ====gslx680_ts_probe begin=====.
[  105.077122] ==kzalloc success=
[  105.079955] [GSLX680] Enter gsl_ts_init_ts
[  105.084326] ctp_set_irq_mode: config gpio to int mode.
[  105.090373] ctp_set_irq_mode, 854: gpio_int_info, port = 8, port_num = 21.
[  105.092447]  INTERRUPT CONFIG
[  105.102321] input: gslx680 as /devices/platform/sunxi-i2c.2/i2c-2/2-0040/input/input1
[  105.193666] =============gsl_load_fw start==============
[  105.235179] usb 2-1: new high-speed USB device number 2 using sw-ehci
[  106.638105] =============gsl_load_fw end==============
[  106.952754] ==gslx680_ts_probe over =
[  112.663989] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode. Opts: (null)
[  117.500978] Installing knfsd (copyright (C) 1996 ok...@monad.swb.de).
[  128.578084] Unable to handle kernel paging request at virtual address 12d51004
[  128.579812] pgd = ee7b8000
[  128.603298] [12d51004] *pgd=00000000
[  128.610688] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[  128.612584] Modules linked in: nfsd exportfs gslx680_ts(O) 8188eu cp210x sunxi_cedar_mod mali ump gpio_sunxi
[  128.624646] CPU: 1    Tainted: G           O  (3.4.79-sun7i #14)
[  128.627862] PC is at module_refcount+0x3c/0xb0
[  128.631080] LR is at module_refcount+0x54/0xb0
[  128.640242] pc : [<c007f130>]    lr : [<c007f148>]    psr: 20000013
[  128.640262] sp : eeaf9eb8  ip : 00000000  fp : bf0f0534
[  128.644299] r10: 00000000  r9 : c0acc658  r8 : c0acbac8
[  128.649592] r7 : bf0f0530  r6 : c078ba34  r5 : 00000000  r4 : c0acc374
[  128.654884] r3 : 12d51000  r2 : 12d51000  r1 : 00000002  r0 : 00000000
[  128.660780] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[  128.665361] Control: 10c5387d  Table: 6e7b806a  DAC: 00000015
[  128.667099]
[  128.667108] PC: 0xc007f0b0:
[  128.667584] f0b0  e585300c e5943000 e0836186 e5856010 e28dd00c e8bd80f0 e5d53005 e3530000
[  128.674782] f0d0  0afffff1 e30203f0 e5951000 e34c0096 eb1beabb e302044c e34c0096 eb1beab8
[  128.681933] f0f0  eaffffe9 e92d43f8 e30b6a34 e30c4374 e34c6078 e30c9658 e1a07000 e5968000
[  128.689190] f110  e34c40ac e34c90ac e3e00000 e3a05000 ea000004 e7992100 e5973154 e0833002
[  128.696399] f130  e5933004 e0855003 e2802001 e3a01002 e1a00008 eb0ecc0d e5943000 e1530000
[  128.703547] f150  cafffff3 f57ff05f e30c9658 e5968000 e34c90ac e3e00000 e3a06000 ea000003
[  128.710723] f170  e7992100 e5973154 e7933002 e0866003 e2802001 e3a01002 e1a00008 eb0ecbfb
[  128.717864] f190  e5943000 e1530000 cafffff4 e0650006 e8bd83f8 e92d4010 e1a04000 e5900000
[  128.726265]
[  128.726285] LR: 0xc007f0c8:
[  128.726768] f0c8  e5d53005 e3530000 0afffff1 e30203f0 e5951000 e34c0096 eb1beabb e302044c
[  128.733974] f0e8  e34c0096 eb1beab8 eaffffe9 e92d43f8 e30b6a34 e30c4374 e34c6078 e30c9658
[  128.741058] f108  e1a07000 e5968000 e34c40ac e34c90ac e3e00000 e3a05000 ea000004 e7992100
[  128.748292] f128  e5973154 e0833002 e5933004 e0855003 e2802001 e3a01002 e1a00008 eb0ecc0d
[  128.755444] f148  e5943000 e1530000 cafffff3 f57ff05f e30c9658 e5968000 e34c90ac e3e00000
[  128.762604] f168  e3a06000 ea000003 e7992100 e5973154 e7933002 e0866003 e2802001 e3a01002
[  128.769671] f188  e1a00008 eb0ecbfb e5943000 e1530000 cafffff4 e0650006 e8bd83f8 e92d4010
[  128.776811] f1a8  e1a04000 e5900000 ebffffcf e3500000 15943008 13a02000 05943000 03a02002
[  128.785179]
[  128.785191] SP: 0xeeaf9e38:
[  128.785659] 9e38  00000008 ffffffff b6eb1000 ee7be5d8 00000001 ee6fa051 c096251d c096251d
[  128.792763] 9e58  c007f130 20000013 ffffffff eeaf9ea4 c0acbac8 c000e798 00000000 00000002
[  128.799958] 9e78  12d51000 12d51000 c0acc374 00000000 c078ba34 bf0f0530 c0acbac8 c0acc658
[  128.807043] 9e98  00000000 bf0f0534 00000000 eeaf9eb8 c007f148 c007f130 20000013 ffffffff
[  128.814095] 9eb8  00000046 ee52d700 ee52d700 bf0f0534 bf0f0534 bf0f0530 eeaf9f88 c007fb90
[  128.821163] 9ed8  c0107ad0 eeab2b40 ee52d700 00000046 00000000 eeab2b40 00000400 c0107de0
[  128.828221] 9ef8  b6f67000 ee52d728 00000001 00000000 00000002 00000000 00000001 ef3fc280
[  128.835251] 9f18  c0107ad0 eeab2b40 eeaf9f88 00000400 b6f67000 00000000 00000000 c013a030
[  128.843599]
[  128.843611] R4: 0xc0acc2f4:
[  128.844070] c2f4  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  128.851156] c314  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  128.858279] c334  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  128.865332] c354  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000001
[  128.872375] c374  00000002 00000001 00000000 00000001 00000000 ef3fc380 00000000 00000000
[  128.879488] c394  00000078 00008000 0000000a 00000000 00000000 00000000 00000001 00000001
[  128.886583] c3b4  0000003c 00000001 00000000 c0b31780 00000000 00000064 00000300 c0acc3d0
[  128.893638] c3d4  c0acc3d0 c00a9d44 00000000 00000000 00000000 c0bc8780 00000000 00000000
[  128.901999]
[  128.902013] R6: 0xc078b9b4:
[  128.902473] b9b4  00000020 00000040 00000080 00000100 00000200 00000400 00000800 00001000
[  128.909544] b9d4  00002000 00004000 00008000 00010000 00020000 00040000 00080000 00100000
[  128.916601] b9f4  00200000 00400000 00800000 01000000 02000000 04000000 08000000 10000000
[  128.923726] ba14  20000000 40000000 80000000 7570635f 0070755f c0acbacc c0acbac4 c0acbac0
[  128.930825] ba34  c0acbac8 00000003 00000063 c003e41c c003ddf0 c003e3e8 c003dd4c 00000000
[  128.937947] ba54  c01079c0 c0107ad0 00000000 00000000 00000000 00000000 00000000 00000000
[  128.945132] ba74  00000000 00000000 c003dd1c 00000000 c0107834 00000000 00000000 00000000
[  128.952174] ba94  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  128.960471]
[  128.960489] R8: 0xc0acba48:
[  128.960959] ba48  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  128.968138] ba68  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  128.975251] ba88  00000000 00000000 00000000 00000000 00000000 00000000 00000000 c0abb358
[  128.982337] baa8  c0abb35c ef0007c0 000000a0 00000000 00000000 00000000 00000003 00000003
[  128.989395] bac8  00000003 00000003 00000000 ef020880 ef020900 ef020980 ef020a00 ef020a80
[  128.996489] bae8  ef020b00 00000001 00000000 c0960684 c096069c c09606a8 c09606b8 c09606c4
[  129.003584] bb08  c09606d0 c09606e0 c09606ec c09606f4 c0960700 c0960708 c0960714 c0960724
[  129.010679] bb28  c0960730 c0960744 c0960758 00000000 00005e37 000003e8 00000001 00000001
[  129.018985]
[  129.018994] R9: 0xc0acc5d8:
[  129.019463] c5d8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  129.026606] c5f8  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  129.033721] c618  00000064 00008000 0000000f 00000002 00000008 d38170c0 d3817080 d3817040
[  129.040791] c638  d3808000 0000002c d380f000 d3817000 00000001 00001000 00000000 00000001
[  129.047909] c658  12d51000 12d59000 00010800 00000002 0006f799 0007ffff 00000000 00000032
[  129.055019] c678  0000fffa 00000001 ef004600 00000000 00000001 ef0066c0 c07715c8 c00e65e4
[  129.062099] c698  c00e3268 00000000 c00e69e4 c00e3264 c00e3160 00000000 00000000 c00e25e8
[  129.069316] c6b8  00000000 00000000 00000003 00000001 00000000 00000000 00000001 c0973e74
[  129.080856] Process lsmod (pid: 2238, stack limit = 0xeeaf82f0)
[  129.084303] Stack: (0xeeaf9eb8 to 0xeeafa000)
[  129.091661] 9ea0:                                                       00000046 ee52d700
[  129.098867] 9ec0: ee52d700 bf0f0534 bf0f0534 bf0f0530 eeaf9f88 c007fb90 c0107ad0 eeab2b40
[  129.106187] 9ee0: ee52d700 00000046 00000000 eeab2b40 00000400 c0107de0 b6f67000 ee52d728
[  129.113382] 9f00: 00000001 00000000 00000002 00000000 00000001 ef3fc280 c0107ad0 eeab2b40
[  129.120566] 9f20: eeaf9f88 00000400 b6f67000 00000000 00000000 c013a030 eeaf9f88 eeab2b40
[  129.127970] 9f40: b6f67000 eeaf8018 eeaf9f88 00000400 eeaf8000 c00ea578 00000001 00000001
[  129.135158] 9f60: eeaf9f74 00000000 00000000 eeab2b40 b6f67000 00000400 eeaf8000 c00eaa28
[  129.142345] 9f80: 00100073 00000000 00000000 00000000 b76d2d28 b6f01c78 00000000 00000003
[  129.149532] 9fa0: c000ed84 c000ec00 b76d2d28 b6f01c78 00000003 b6f67000 00000400 00000000
[  129.156709] 9fc0: b76d2d28 b6f01c78 00000000 00000003 bef9ac5c 0000000a bef9ac5c 00000000
[  129.164060] 9fe0: 00000000 bef9abb0 b6e71605 b6ea9fdc 40000010 00000003 00000000 00000000
[  129.171267] [<c007f130>] (module_refcount+0x3c/0xb0) from [<c007fb90>] (m_show+0x3c/0x178)
[  129.177859] [<c007fb90>] (m_show+0x3c/0x178) from [<c0107de0>] (seq_read+0x310/0x49c)
[  129.184975] [<c0107de0>] (seq_read+0x310/0x49c) from [<c013a030>] (proc_reg_read+0x70/0x94)
[  129.191985] [<c013a030>] (proc_reg_read+0x70/0x94) from [<c00ea578>] (vfs_read+0x98/0x174)
[  129.198576] [<c00ea578>] (vfs_read+0x98/0x174) from [<c00eaa28>] (sys_read+0x38/0x78)
[  129.205728] [<c00eaa28>] (sys_read+0x38/0x78) from [<c000ec00>] (ret_fast_syscall+0x0/0x30)
[  129.210967] Code: ea000004 e7992100 e5973154 e0833002 (e5933004)
[  129.242667] ---[ end trace cf7c7aa79bbac358 ]---

[Priit Laes]

On Wed, 2015-03-11 at 20:08 -0300, Leonardo wrote:
> Hello everybody. I'm having such a hard time trying to get the
> GSL1680 touch panel working on my A20 device. Actually it's a INET
> K70 tablet and I would like to replace it's Android for a full Linux
> distro.

This one? http://linux-sunxi.org/Inet_k70hc

If not, then please start here:
http://linux-sunxi.org/New_Device_howto

> [ 105.193666] =============gsl_load_fw start==============

> [ 105.235179] usb 2-1: new high-speed USB device number 2 using sw-

> ehci [ 106.638105] =============gsl_load_fw end==============

> [ 106.952754] ==gslx680_ts_probe over =
> [ 112.663989] EXT4-fs (mmcblk0p1): mounted filesystem with ordered
> data mode. Opts: (null)
> [ 117.500978] Installing knfsd (copyright (C) 1996 ok...@monad.swb.de

> ). [ 128.578084] Unable to handle kernel paging request at virtual

> --
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[Leonardo]

Yes, that one. Later I've decided to give this driver a try:

https://github.com/rastersoft/gsl1680

It worked like a charm. I just had to swap the x and y coordinates on code, because it was working in portrait mode, but that's all.