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> 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> >> >> 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> >> 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 >>> 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 >> >> >> _______________________________________________ >> 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 > > > _______________________________________________ > 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 > _______________________________________________ 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
