Hello Greg, This files come from the eTPU patch.
To have access to register, I made a driver who modified the SACU. uint8_t *gpacr = (uint8_t *) (0x40000030); uint8_t *pacr0 = (uint8_t *) (0x40000024); uint8_t *pacr1 = (uint8_t *) (0x40000025); uint8_t *pacr2 = (uint8_t *) (0x40000026); uint8_t *pacr3 = (uint8_t *) (0x40000027); uint8_t *pacr4 = (uint8_t *) (0x40000028); uint8_t *pacr5 = (uint8_t *) (0x4000002A); uint8_t *pacr6 = (uint8_t *) (0x4000002B); uint8_t *pacr7 = (uint8_t *) (0x4000002C); uint8_t *pacr8 = (uint8_t *) (0x4000002E); *gpacr = 0x0C; *pacr0 = 0x44; *pacr1 = 0x44; /* EIM required for Chip Select access */ *pacr2 = 0x44; *pacr3 = 0x44; *pacr4 = 0x44; /* I2C */ *pacr5 = 0x44; *pacr6 = 0x44; *pacr7 = 0x44; /* INTC0 & 1 handy for debug */ *pacr8 = 0x44; /* FEC MAC */ Now I have no error message : "Access Error Exception 12: Error on data read". Why build the system does not change the SACU while in the config.c file I specified the access rights? 2010/12/10 Greg Ungerer <g...@snapgear.com> > > Hi Sebastien, > > > On 09/12/10 23:24, Sébastien MENNETRIER wrote: > >> I am reading 0x40000030 to see the value of GPACR. >> In the file "arch/m68knommu/platform/523x/config.c", GPACR is defined : >> uint8_t *gpacr = (uint8_t *) (MCF_IPSBAR + MCF523x_GPACR); >> *gpacr = 0x0C; >> >> And "MCF523x_GPACR" is defined in file "arch/m68k/include/asm/m523xsim.h" >> : >> #define MCF523x_GPACR (0x30) >> > > Hmmm, this is not in the original source (uClinux-dist-20101026). > Did the etpu patch add it in? Did you add it in? > > Double check your reading and writing of the SACU registers. > Put trace all around it, and print the address you are accessing > as well - just to be sure. > > Regards > Greg > > > >> >> In the file "arch/m68k/include/asm/colfire.h", I see : >> #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || >> defined(CONFIG_M528x) || \ >> defined(CONFIG_M520x) >> #undef MCF_MBAR >> #define MCF_MBAR MCF_IPSBAR >> >> And MCF523x_ETPU is define : >> #define MCF523x_ETPU 0x1D0000 >> >> So I think that "MCF_MBAR + MCF523x_ETPU" = "IPSBAR + 0x1D0000" = >> 0x401D0000. >> >> And the structure is defined at this adresse. >> >> >> 2010/12/9 Jim Donelson <ucli...@jimdonelson.com >> <mailto:ucli...@jimdonelson.com>> >> >> >> Well, I'm not sure why you are reading 0x40000030, when the registers >> start at 0x401D0000. >> "MCF_MBAR + MCF523x_ETPU sounds wrong as the registers are defined to >> start at IPSBAR + 0x1D0000, so 0x401D0000 sound correct to me for the >> first register. >> >> >> On Thu, Dec 9, 2010 at 7:03 AM, Sébastien MENNETRIER >> <smennetr...@epsi.fr <mailto:smennetr...@epsi.fr>> wrote: >> > Hello, >> > Thanks for your help Jim. >> > The structure seem have the good alignement. >> > The structure is declaring at the adress : 0x401D0000 >> > struct eTPU_struct *eTPU = (struct eTPU_struct *)0x401D0000; >> > And in the kernel code : >> > In file "./arch/m68k/include/asm/m523xsim.h" : #define MCF523x_ETPU >> > 0x1D0000 >> > In the driver file "./drivers/misc/mcfetpu_serial.c", there are >> "MCF_MBAR + >> > MCF523x_ETPU" with MCF_MBAR = MCF_IPSBAR = 0x40000000 >> > So it's the same adress. >> > I made a driver to see the GPACR and the PACR* : >> > uint8_t *gpacr = (uint8_t *) (0x40000030); >> > uint8_t *pacr0 = (uint8_t *) (0x40000024); >> > uint8_t *pacr1 = (uint8_t *) (0x40000025); >> > uint8_t *pacr2 = (uint8_t *) (0x40000026); >> > uint8_t *pacr3 = (uint8_t *) (0x40000027); >> > uint8_t *pacr4 = (uint8_t *) (0x40000028); >> > uint8_t *pacr5 = (uint8_t *) (0x4000002A); >> > uint8_t *pacr6 = (uint8_t *) (0x4000002B); >> > uint8_t *pacr7 = (uint8_t *) (0x4000002C); >> > uint8_t *pacr8 = (uint8_t *) (0x4000002E); >> > printk(KERN_DEBUG "GPACR : %#x", *gpacr); >> > printk(KERN_DEBUG "PACR0 : %#x", *pacr0); >> > printk(KERN_DEBUG "PACR1 : %#x", *pacr1); >> > printk(KERN_DEBUG "PACR2 : %#x", *pacr2); >> > printk(KERN_DEBUG "PACR3 : %#x", *pacr3); >> > printk(KERN_DEBUG "PACR4 : %#x", *pacr4); >> > printk(KERN_DEBUG "PACR5 : %#x", *pacr5); >> > printk(KERN_DEBUG "PACR6 : %#x", *pacr6); >> > printk(KERN_DEBUG "PACR7 : %#x", *pacr7); >> > printk(KERN_DEBUG "PACR8 : %#x", *pacr8); >> > But they are all equal at "0x00". >> > It's very strange, isn't it? >> > Are they an other security to protect the register? >> > MENNETRIER Sébastien >> > FRANCE >> > >> > >> > 2010/12/9 Jim Donelson <ucli...@jimdonelson.com >> <mailto:ucli...@jimdonelson.com>> >> >> >> >> >> Probably has to do with structure alignment. Not sure what the >> packing >> >> options/pragmas are for that situation. >> >> >> >> On Thu, Dec 9, 2010 at 4:54 AM, Sébastien MENNETRIER >> <smennetr...@epsi.fr <mailto:smennetr...@epsi.fr>> >> >> >> wrote: >> >>> >> >>> Hello, >> >>> I work on a MCF5235 coldfire and with "uClinux-dist-20101026". >> I try to >> >>> use the eTPU. >> >>> I have install the driver and dowload the application to use >> eTPU on >> >>> freescale website. >> >>> When I start the programme, there are an error : "Access Error >> Exception >> >>> 12: Error on data read". >> >>> So I modify the file : >> >>> "uClinux-dist/linux-2.6.x/arch/m68knommu/platform/523x/config.c". >> >>> I have modify "*gpacr" and all "*pacrx" to obtain the access to >> the >> >>> register. >> >>> uint8_t *gpacr = (uint8_t *) (MCF_IPSBAR + MCF523x_GPACR); >> >>> uint8_t *pacr1 = (uint8_t *) (MCF_IPSBAR + MCF523x_PACR1); >> >>> uint8_t *pacr4 = (uint8_t *) (MCF_IPSBAR + MCF523x_PACR4); >> >>> uint8_t *pacr7 = (uint8_t *) (MCF_IPSBAR + MCF523x_PACR7); >> >>> uint8_t *pacr8 = (uint8_t *) (MCF_IPSBAR + MCF523x_PACR8); >> >>> >> >>> >> >> //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! >> >>> // *gpacr = 0x04; >> >>> // *pacr1 = 0x40; /* EIM required for Chip Select access */ >> >>> // *pacr4 = 0x40; /* I2C */ >> >>> // *pacr7 = 0x44; /* INTC0 & 1 handy for debug */ >> >>> // *pacr8 = 0x40; /* FEC MAC */ >> >>> >> >>> >> >> //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! >> >>> *gpacr = 0x0C; >> >>> *pacr1 = 0x44; /* EIM required for Chip Select access */ >> >>> *pacr4 = 0x44; /* I2C */ >> >>> *pacr7 = 0x44; /* INTC0 & 1 handy for debug */ >> >>> *pacr8 = 0x44; /* FEC MAC */ >> >>> >> >>> But this change did not solve the problem. >> >>> Can you help me please? >> >>> >> >>> MENNETRIER Sébastien >> >>> FRANCE >> >>> _______________________________________________ >> >>> uClinux-dev mailing list >> >>> uClinux-dev@uclinux.org <mailto:uClinux-dev@uclinux.org> >> >> >>> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >> >>> This message was resent by uclinux-dev@uclinux.org >> <mailto:uclinux-dev@uclinux.org> >> >> >>> To unsubscribe see: >> >>> http://mailman.uclinux.org/mailman/options/uclinux-dev >> >> >> >> >> >> _______________________________________________ >> >> uClinux-dev mailing list >> >> uClinux-dev@uclinux.org <mailto:uClinux-dev@uclinux.org> >> >> >> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >> >> This message was resent by uclinux-dev@uclinux.org >> <mailto:uclinux-dev@uclinux.org> >> >> >> To unsubscribe see: >> >> http://mailman.uclinux.org/mailman/options/uclinux-dev >> > >> > >> > _______________________________________________ >> > uClinux-dev mailing list >> > uClinux-dev@uclinux.org <mailto:uClinux-dev@uclinux.org> >> >> > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >> > This message was resent by uclinux-dev@uclinux.org >> <mailto:uclinux-dev@uclinux.org> >> >> > To unsubscribe see: >> > http://mailman.uclinux.org/mailman/options/uclinux-dev >> > >> _______________________________________________ >> uClinux-dev mailing list >> uClinux-dev@uclinux.org <mailto:uClinux-dev@uclinux.org> >> >> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >> This message was resent by uclinux-dev@uclinux.org >> <mailto:uclinux-dev@uclinux.org> >> >> To unsubscribe see: >> http://mailman.uclinux.org/mailman/options/uclinux-dev >> >> >> >> >> _______________________________________________ >> uClinux-dev mailing list >> uClinux-dev@uclinux.org >> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >> This message was resent by uclinux-dev@uclinux.org >> To unsubscribe see: >> http://mailman.uclinux.org/mailman/options/uclinux-dev >> > > > -- > ------------------------------------------------------------------------ > Greg Ungerer -- Principal Engineer EMAIL: g...@snapgear.com > SnapGear Group, McAfee PHONE: +61 7 3435 2888 > 8 Gardner Close FAX: +61 7 3217 5323 > Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com >
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