Each platform had its own version of the upmconfig, despite the init process being identical. Now that we have a spot for common lbc code, create a common upmconfig() there.
Signed-off-by: Becky Bruce beckyb@kernel.crashing.org --- arch/powerpc/cpu/mpc83xx/cpu.c | 66 ------------------------------------ arch/powerpc/cpu/mpc85xx/cpu.c | 61 --------------------------------- arch/powerpc/cpu/mpc8xxx/fsl_lbc.c | 51 +++++++++++++++++++++++++++ arch/powerpc/include/asm/fsl_lbc.h | 3 ++ 4 files changed, 54 insertions(+), 127 deletions(-)
diff --git a/arch/powerpc/cpu/mpc83xx/cpu.c b/arch/powerpc/cpu/mpc83xx/cpu.c index 24193ce..d37fc80 100644 --- a/arch/powerpc/cpu/mpc83xx/cpu.c +++ b/arch/powerpc/cpu/mpc83xx/cpu.c @@ -125,72 +125,6 @@ int checkcpu(void) return 0; }
- -/* - * 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 write - * to '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 8 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 immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; - volatile fsl_lbc_t *lbc = &immap->im_lbc; - volatile uchar *dummy = NULL; - const u32 msel = (upm + 4) << BR_MSEL_SHIFT; /* What the MSEL field in BRn should be */ - volatile u32 *mxmr = &lbc->mamr + upm; /* ptr to mamr, mbmr, or mcmr */ - uint i; - - /* Find the address for the dummy write transaction */ - for (i = 0; i < 8; i++) { - if ((get_lbc_br(i) & BR_MSEL) == msel) { - dummy = (uchar *) (get_lbc_br(i) & BR_BA); - break; - } - } - - 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) | 0x10000000; - - for (i = 0; i < size; i++) { - lbc->mdr = table[i]; - __asm__ __volatile__ ("sync"); - *dummy = 0; /* Write the value to memory and increment MAD */ - __asm__ __volatile__ ("sync"); - while(((*mxmr & 0x3f) != ((i + 1) & 0x3f))); - } - - /* Set the OP field in the MxMR to "normal" and the MAD field to 000000 */ - *mxmr &= 0xCFFFFFC0; -} - - int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) { diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c index 7ab4a2a..987eae4 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu.c +++ b/arch/powerpc/cpu/mpc85xx/cpu.c @@ -252,67 +252,6 @@ reset_85xx_watchdog(void) #endif /* CONFIG_WATCHDOG */
/* - * Configures a UPM. The function requires the respective MxMR to be set - * before calling this function. "size" is the number or entries, not a sizeof. - */ -void upmconfig (uint upm, uint * table, uint size) -{ - int i, mdr, mad, old_mad = 0; - volatile u32 *mxmr; - volatile fsl_lbc_t *lbc = LBC_BASE_ADDR; - volatile u8* dummy = NULL; - int upmmask; - - switch (upm) { - case UPMA: - mxmr = &lbc->mamr; - upmmask = BR_MS_UPMA; - break; - case UPMB: - mxmr = &lbc->mbmr; - upmmask = BR_MS_UPMB; - break; - case UPMC: - mxmr = &lbc->mcmr; - upmmask = BR_MS_UPMC; - break; - default: - printf("%s: Bad UPM index %d to configure\n", __FUNCTION__, upm); - hang(); - } - - /* Find the address for the dummy write transaction */ - for (i = 0; i < 8; i++) { - if ((get_lbc_br(i) & (BR_V | BR_MSEL)) == (BR_V | upmmask)) { - dummy = (volatile u8 *)(get_lbc_br(i) & BR_BA); - break; - } - } - - if (i == 8) { - printf("Error: %s() could not find matching BR\n", __FUNCTION__); - hang(); - } - - for (i = 0; i < size; i++) { - /* 1 */ - out_be32(mxmr, (in_be32(mxmr) & 0x4fffffc0) | MxMR_OP_WARR | i); - /* 2 */ - out_be32(&lbc->mdr, table[i]); - /* 3 */ - mdr = in_be32(&lbc->mdr); - /* 4 */ - *(volatile u8 *)dummy = 0; - /* 5 */ - do { - mad = in_be32(mxmr) & MxMR_MAD_MSK; - } while (mad <= old_mad && !(!mad && i == (size-1))); - old_mad = mad; - } - out_be32(mxmr, (in_be32(mxmr) & 0x4fffffc0) | MxMR_OP_NORM); -} - -/* * Initializes on-chip MMC controllers. * to override, implement board_mmc_init() */ diff --git a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c index e0a15c4..3ad2131 100644 --- a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c +++ b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c @@ -82,3 +82,54 @@ void init_early_memctl_regs(void) set_lbc_br(7, CONFIG_SYS_BR7_PRELIM); #endif } + +/* + * Configures a UPM. The function requires the respective MxMR to be set + * before calling this function. "size" is the number or entries, not a sizeof. + */ +void upmconfig(uint upm, uint *table, uint size) +{ + fsl_lbc_t *lbc = LBC_BASE_ADDR; + int i, mdr, mad, old_mad = 0; + u32 mask = (~MxMR_OP_MSK & ~MxMR_MAD_MSK); + u32 msel = BR_UPMx_TO_MSEL(upm); + u32 *mxmr = &lbc->mamr + upm; + volatile u8 *dummy = NULL; + + if (upm < UPMA || upm > UPMC) { + printf("Error: %s() Bad UPM index %d\n", __func__, upm); + hang(); + } + + /* + * Find the address for the dummy write - scan all of the BRs until we + * find one matching the UPM and extract the base address bits from it. + */ + for (i = 0; i < 8; i++) { + if ((get_lbc_br(i) & (BR_V | BR_MSEL)) == (BR_V | msel)) { + dummy = (volatile u8 *)(get_lbc_br(i) & BR_BA); + break; + } + } + + if (!dummy) { + printf("Error: %s() No matching BR\n", __func__); + hang(); + } + + /* Program UPM using steps outlined by the reference manual */ + for (i = 0; i < size; i++) { + out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_WARR | i); + out_be32(&lbc->mdr, table[i]); + mdr = in_be32(&lbc->mdr); + *dummy = 0; + do { + mad = in_be32(mxmr) & MxMR_MAD_MSK; + } while (mad <= old_mad && !(!mad && i == (size-1))); + old_mad = mad; + } + + /* Return to normal operation */ + out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_NORM); +} + diff --git a/arch/powerpc/include/asm/fsl_lbc.h b/arch/powerpc/include/asm/fsl_lbc.h index 33e6dd9..82d24ab 100644 --- a/arch/powerpc/include/asm/fsl_lbc.h +++ b/arch/powerpc/include/asm/fsl_lbc.h @@ -62,6 +62,8 @@ #define BR_V 0x00000001 #define BR_V_SHIFT 0
+#define BR_UPMx_TO_MSEL(x) ((x + 4) << BR_MSEL_SHIFT) + #define UPMA 0 #define UPMB 1 #define UPMC 2 @@ -458,6 +460,7 @@
extern void print_lbc_regs(void); extern void init_early_memctl_regs(void); +extern void upmconfig(uint upm, uint *table, uint size);
#define LBC_BASE_ADDR ((fsl_lbc_t *)CONFIG_SYS_LBC_ADDR) #define get_lbc_br(i) (in_be32(&(LBC_BASE_ADDR)->bank[i].br))