Add support for UPM configuration on the 85xx platform. In addition, on the MPC83xx, remove MPC834x precompiler condition, in order to support all MPC83xx processors.
Signed-off-by: David Saada david.saada@ecitele.com
--- a/include/mpc85xx.h 2008-02-07 12:11:35.873966000 +0200 +++ b/include/mpc85xx.h 2008-02-07 13:13:34.255165000 +0200 @@ -35,7 +35,10 @@ #define BRx_MS_UPMA 0x00000080 /* U.P.M.A Machine Select */ #define BRx_MS_UPMB 0x000000a0 /* U.P.M.B Machine Select */ #define BRx_MS_UPMC 0x000000c0 /* U.P.M.C Machine Select */ +#define BRx_MS_MSK 0x000000e0 /* Machine select mask */ +#define BRx_MS_SHIFT 5 /* Machine select shift */ #define BRx_PS_8 0x00000800 /* 8 bit port size */ +#define BRx_PS_16 0x00001000 /* 16 bit port size */ #define BRx_PS_32 0x00001800 /* 32 bit port size */ #define BRx_BA_MSK 0xffff8000 /* Base Address Mask */
@@ -53,8 +56,10 @@ #define ORxU_AM_MSK 0xffff8000 /* Address Mask Mask */
#define MxMR_OP_NORM 0x00000000 /* Normal Operation */ -#define MxMR_DSx_2_CYCL 0x00400000 /* 2 cycle Disable Period */ #define MxMR_OP_WARR 0x10000000 /* Write to Array */ +#define MxMR_DSx_2_CYCL 0x00400000 /* 2 cycle Disable Period */ +#define MxMR_DSx_3_CYCL 0x00800000 /* 3 cycle Disable Period */ +#define MxMR_GPL4_LPWT 0x00040000 /* LGPL4 Line in LUPWAIT mode */ #define MxMR_BSEL 0x80000000 /* Bus Select */
/* helpers to convert values into an OR address mask (GPCM mode) */ --- a/cpu/mpc83xx/cpu.c 2008-02-07 12:11:27.569737000 +0200 +++ b/cpu/mpc83xx/cpu.c 2008-02-07 13:14:44.975179000 +0200 @@ -227,7 +227,6 @@ int checkcpu(void) */ void upmconfig (uint upm, uint *table, uint size) { -#if defined(CONFIG_MPC834X) volatile immap_t *immap = (immap_t *) CFG_IMMR; volatile lbus83xx_t *lbus = &immap->lbus; volatile uchar *dummy = NULL; @@ -260,10 +259,6 @@ void upmconfig (uint upm, uint *table, u
/* Set the OP field in the MxMR to "normal" and the MAD field to 000000 */ *mxmr &= 0xCFFFFFC0; -#else - printf("Error: %s() not defined for this configuration.\n", __FUNCTION__); - hang(); -#endif }
--- a/cpu/mpc85xx/cpu.c 2008-02-07 12:11:27.616748000 +0200 +++ b/cpu/mpc85xx/cpu.c 2008-02-07 13:30:38.359554000 +0200 @@ -29,6 +29,7 @@ #include <watchdog.h> #include <command.h> #include <asm/cache.h> +#include "asm/immap_85xx.h"
int checkcpu (void) { @@ -263,3 +264,68 @@ int dma_xfer(void *dest, uint count, voi return dma_check(); } #endif + +/* + * Program a UPM with the code supplied in the table. + * + * The 'dummy' variable is used to increment the MAD. 'dummy' is + * supposed to be a pointer to the memory of the device being + * programmed by the UPM. The data in the MDR is written into + * memory and the MAD is incremented every time there's a read + * from 'dummy'. Unfortunately, the current prototype for this + * function doesn't allow for passing the address of this + * device, and changing the prototype will break a number lots + * of other code, so we need to use a round-about way of finding + * the value for 'dummy'. + * + * The value can be extracted from the base address bits of the + * Base Register (BR) associated with the specific UPM. To find + * that BR, we need to scan all BRs until we find the one that + * has its MSEL bits matching the UPM we want. Once we know the + * right BR, we can extract the base address bits from it. + * + * The MxMR and the BR and OR of the chosen bank should all be + * configured before calling this function. + * + * Parameters: + * upm: 0=UPMA, 1=UPMB, 2=UPMC + * table: Pointer to an array of values to program + * size: Number of elements in the array. Must be 64 or less. + */ +void upmconfig (uint upm, uint *table, uint size) +{ + volatile ccsr_lbc_t *lbc = (void *)(CFG_MPC85xx_LBC_ADDR); + volatile uchar *dummy = NULL; + const u32 msel = (upm + 4) << BRx_MS_SHIFT; /* What the MSEL field in BRn should be */ + volatile uint *mxmr = &lbc->mamr + upm; /* Pointer to mamr, mbmr, or mcmr */ + volatile uint *brx = &lbc->br0; /* Pointer to BRx */ + uint i; + + /* Scan all the banks to determine the base address of the device */ + for (i = 0; i < 8; i++) { + if ((*brx & BRx_MS_MSK) == msel) { + dummy = (uchar *) (*brx & BRx_BA_MSK); + break; + } + brx += 2; /* Skip to next BRx */ + } + + if (!dummy) { + printf("Error: %s() could not find matching BR\n", __FUNCTION__); + hang(); + } + + /* Set the OP field in the MxMR to "write" and the MAD field to 000000 */ + *mxmr = (*mxmr & 0xCFFFFFC0) | MxMR_OP_WARR; + + for (i = 0; i < size; i++) { + lbc->mdr = table[i]; + __asm__ __volatile__ ("sync"); + *dummy; /* Write the value to memory and increment MAD */ + __asm__ __volatile__ ("sync"); + } + + /* Set the OP field in the MxMR to "normal" and the MAD field to 000000 */ + *mxmr &= 0xCFFFFFC0; +} +