powerpc 83xx/85xx: Merge lbc upmconfig code

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>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/cpu/mpc83xx/cpu.c

@@ -126,72 +126,6 @@ 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 * const argv[])
 {

arch/powerpc/cpu/mpc85xx/cpu.c

@@ -251,67 +251,6 @@ 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()

arch/powerpc/cpu/mpc8xxx/fsl_lbc.c

@@ -82,3 +82,53 @@ 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);
+}

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))