[U-Boot-Users] [PATCH v2] MPC85xx, MPC83xx: Add/Fix UPM configuration support

[David Saada]

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 at 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;
+}
+

-- 
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