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Hello,
Stef, I think you are absolutely right with your diagnostic that the
genesys driver (written for gl646) fails with gl841 because the
registers of the gl841 are different to the regs from gl646.
So I've shortly compared the gl841 with the gl646. The result is in the
attached file.
As far as I am concerned, I think we mainly have to adapt the functions
handling the scanner controler registers (e.g. genesys_init_registers).
I think we can use the whole file genesys.c and the register/memory
write/read functions for a gl841 driver, but I don't have the overview
to decide this.
As I don't know the best way to support the gl841 controller without the
development of parts, that are equal to gl646, I'd be glad to get some
suggestions on this subject.
Thanks for your suggestions
Philipp
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This is a comparison of between the scanner controllers GL841 and GL646.
The bases of this comparision are the datasheets of this controllers.
(http://www.genesyslogic.com/econtents/product02.asp?SN=47&minicidx=3&lastcidx=18
and
http://www.genesyslogic.com/econtents/product02.asp?SN=48&minicidx=3&lastcidx=18)
Attention: This comparison isn't complete at all !
analogue frontend:
GL646 has a built-in 16-bit AFE. GL841 needs an external AFE. In lide50, it
is reported to be WM8199CDS (see
http://www.wolfsonmicro.com/products/digital_imaging/WM8199/)
PC interface:
GL646 has a built-in USB 1.1 interface. Optional there is an extern USB 2.0 or
IEEE 1394 interface controller.
The only interface in the GL841 is the built-in USB 2.0 controller.
registers:
view of GL 841:
0x01 Bit 4: nothing instead of FASTMOD
Bit 3: M16DRAM instead of COMPENB
0x02 Bit 2: HOMENEG
Bit 1: LONGCURV instead of STEPSEL[1:0]
0x03 Bit 7: LAMPDOG instead of TG3
Bit 4-0: LAMPTIM[3:0] instead of LAMPDOG, LAMPTIM[2:0]
0x04 Bit 5-4: AFEMOD[1:0] instead of ADTYPE[1:0]
0x05 Bit 5-4: MTLLAMP[1:0] instead of GMMITYPE[1:0]
Bit 2: nothing instead of LEDADD
Bit 1-0: MTLBASE[1:0] instead of BASESEL[1:0]
0x06 Bit 7-5: SCANMOD[2:0] instead of nothing
0x07 Bit 3: SRAMSEL instead of nothing
Bit 2: FASTDMA instead of nothing
0x08 Bit 6: DECFLAG instead of nothing
Bit 5: GMMFFR instead of nothing
Bit 4: GMMFFG
Bit 3: GMMFFB
Bit 2: GMMZR
Bit 1: GMMZG
Bit 0: GMMZB instead of RSH[4:0]
0x09 Bit 7-6: MCNTSET[1:0] instead of nothing
Bit 5-4: CLKSET[1:0]
Bit 3: BACKSCAN
Bit 2: ENHANCE
Bit 1: SHORTTG
Bit 0: NWAIT instead of RSL[4:0]
0x0A Bit 0: SRAMBUG instead of CPH[4:0] (Bit 4-0)
0x0B nothing instead of CPL[4:0] (Bit 4-0)
0x0C equal (nothing)
0x0D Bit 7: CLRLNCNT instead of nothing
0x0E equal (nothing)
0x0F equal (nothing)
0x10 equal (nothing)
0x11 equal (nothing)
0x12 equal (nothing)
0x13 equal (nothing)
0x14 equal (nothing)
0x15 equal (nothing)
0x16 Bit 6: TOSHIBA instead of SELINV
0x17 equal
0x18 equal
0x19 equal
0x1A Bit 5: MANUAL3
Bit 4: MANUAL1
Bit 3: CK4INV
Bit 2: CK3INV
Bit 1: LINECLP instead of CKH[4:0] (Bit 4-0)
0x1B nothing instead of CKL[4:0] (Bit 4-0)
0x1C Bit 7: CK3MTGL instead of CK3SEL
Bit 6: CK3MTGL instead of CK3INV
Bit 5: CK1MTGL
Bit 4: CKAREA
Bit 3: MTLWD
Bit 2-0: GGTIME[2:0] instead of TGSEL[5:0]
0x1D Bit 7: CK4LOW instead of CKMANUAL
Bit 6: CK3LOW instead of TCDFAST
Bit 5: CK1LOW instead of DMYPIY
0x1E equal
0x1F equal
0x20 equal
0x21 equal
0x22 equal
0x23 equal
0x24 equal
0x25 Bit 3-0: LINCNT[19:16] instead of LINCNT[17:16] (Bit 1-0)
0x26 equal
0x27 equal
0x28 Bit 7-0 "GMMWRDATA" instead of LAMPPWM[8] (Bit 0)
0x29 equal
0x2A/B RAMADDR[15:0] instead of RAMA[14:0]
(This registers have different names, but I think, the meaning is the
same exept for missing Bit 15 in gl646)
0x2C equal
0x2D equal
0x2E equal
0x2F equal
0x30 equal
0x31 equal
0x32 equal
0x33 equal
0x34 equal
0x35 MAXWD[19:16] instead of MAXWD[18:16]
0x36 equal
0x37 equal
0x38 equal
0x39 equal
0x3A FEWRDATA[8] instead of FEWDATA[9:8]
0x3B equal
0x3C equal
0x3D FEEDL[19:16] instead of FEEDL[17:16]
0x3E equal
0x3F equal
0x40 Bit 2: HISPDFLG
Bit 1: MOTMFGL
Bit 0: DATAENB instead of empty register
0x41 Bit 0: MOTORENB instead of MOTMFLG
0x42 equal
0x43 equal
0x44 equal
0x45 equal
0x46 equal
0x47 FERDATA[8] instead of FERDATA[9:8]
0x48 FEDCNT[19:16] instead of FEDCNT[17:16]
0x49 equal
0x4A equal
0x4B SCANCNT[19:16] instead of SCANCNT[17:16]
0x4C equal
0x4D equal
0x4E "GMMRDDATA" instead of LPERIODRD[15:8]
0x4F empty register instead of LPERIODRD[7:0]
0x50 equal
0x51 equal
0x52 equal
0x53 equal
0x54 equal
0x55 equal
0x56 equal
0x57 equal
0x58 equal
0x59 equal
0x5A Bit 1: ADCLKINV instead of WMSEL
0x5B GMMADDR[9:8] instead of CKFH[4:0]
0x5C GMMADDR[7:0] instead of CKFL[4:0]
0x5D HISPD[7:0] instead of CKSH[4:0]
0x5E Bit 7-5: DECSEL[2:0]
Bit 4-0: STOPTIM[4:0] instead of CKSL[4:0]
0x5F FMOVDEC[7:0] instead of empty register
Z1MOD and Z2MOD are 21 bit big instead of 18 bit on the gl646. In the gl841,
the Z1MOD[20:16] and ZIMOD[20:16] bits are next to the other Z1MOD and Z2MOD
bits.
In the gl646 Z1MOD[18:16] and Z2MOD[18:16] bits are behind the GPO bits in
register
0x6C.
So the differences after 0x5F are enourmous. gl841 has 0x87 registers wheras
gl646 has only 0x71 registers. Please read the datasheets to get the detailed
differences.
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