[U-Boot-Users] [PATCH] One more patch for the sequoia

[Stefan Roese]

Hi Jeff,

On Wednesday 09 May 2007, Jeff Mann wrote:
> I've tried again. (attched this time so that OUTLOOK does not mess up
> the formating.)
>
> Explanation of attached patch:
>
> Because the Sequoia board does not boot with an EBC faster than 66MHz,
> the clock divider are changed after the initial boot process.
>
> This allows for maximum clocking speeds  to be achieved on newer boards.
> Sequoia boards with 666.66 MHz processors require that the EBC divider
> be set to 3 in order to start the initial boot process at a slower EBC
> speed. After the initial boot process, the divider can be set back to 2,
>
> which will cause the boards to run at 83.333MHz. This is backward
> compatible with boards with 533.33 MHz processors, as these boards will
> already be set with an EBC divider of 2.

I made small cosmetic changes. Please give the attached version a try and
let me know if it still works for you. Thanks.

diff --git a/board/amcc/sequoia/sequoia.c b/board/amcc/sequoia/sequoia.c
index 930fa71..8704014 100644
--- a/board/amcc/sequoia/sequoia.c
+++ b/board/amcc/sequoia/sequoia.c
@@ -132,6 +132,12 @@ int board_early_init_f(void)
 		(0x80000000 >> (28 + CFG_NAND_CS));
 	mtsdr(SDR0_CUST0, sdr0_cust0);
 
+	/* Update EBC speed after booting from i2c bootstrap settings
+	 * on newer boards with 33.333 MHZ Clocks
+	 */
+	if (in8(CFG_BCSR_BASE + 3) & 0x80)
+		mtcpr(0xe0, 0x02000000);
+
 	return 0;
 }
 
@@ -363,8 +369,8 @@ int checkboard(void)
 	printf("Board: Rainier - AMCC PPC440GRx Evaluation Board");
 #endif
 
-	rev = *(u8 *)(CFG_BCSR_BASE + 0);
-	val = *(u8 *)(CFG_BCSR_BASE + 5) & 0x01;
+	rev = in8(CFG_BCSR_BASE + 0);
+	val = in8(CFG_BCSR_BASE + 5) & 0x01;
 	printf(", Rev. %X, PCI=%d MHz", rev, val ? 66 : 33);
 
 	if (s != NULL) {
diff --git a/include/ppc440.h b/include/ppc440.h
index bc1d7aa..07f75de 100644
--- a/include/ppc440.h
+++ b/include/ppc440.h
@@ -1425,9 +1425,6 @@
 /*----------------------------------------------------------------------------+
 | Clock / Power-on-reset DCR's.
 +----------------------------------------------------------------------------*/
-#define CPR0_CFGADDR			0x00C
-#define CPR0_CFGDATA			0x00D
-
 #define CPR0_CLKUPD			0x20
 #define CPR0_CLKUPD_BSY_MASK		0x80000000
 #define CPR0_CLKUPD_BSY_COMPLETED	0x00000000
@@ -3314,6 +3311,23 @@
 #define mtsdr(reg, data)	do { mtdcr(sdrcfga,reg);mtdcr(sdrcfgd,data); } while (0)
 #define mfsdr(reg, data)	do { mtdcr(sdrcfga,reg);data = mfdcr(sdrcfgd); } while (0)
 
+/*
+ * All 44x except 440GP have CPR registers (indirect DCR)
+ */
+#if !defined(CONFIG_440GP)
+#define CPR0_CFGADDR		0x00C
+#define CPR0_CFGDATA		0x00D
+
+#define mtcpr(reg, data)	do { \
+		mtdcr(CPR0_CFGADDR, reg); \
+		mtdcr(CPR0_CFGDATA, data); \
+	} while (0)
+
+#define mfcpr(reg, data)	do { \
+		mtdcr(CPR0_CFGADDR, reg); \
+		data = mfdcr(CPR0_CFGDATA); \
+	} while (0)
+#endif
 
 #ifndef __ASSEMBLY__