ppc4xx: Add initial Zeus (PPC405EP) board support

Signed-off-by: Stefan Roese <sr@denx.de>

3 files changed, 35 insertions, 42 deletions

diff --git a/cpu/ppc4xx/sdram.c b/cpu/ppc4xx/sdram.c
index 3a0ca17d9f..2724d91f0f 100644
--- a/cpu/ppc4xx/sdram.c
+++ b/cpu/ppc4xx/sdram.c
@@ -187,14 +187,14 @@ void sdram_init(void)
 		/*
 		 * Disable memory controller.
 		 */
-		mtsdram0(mem_mcopt1, 0x00000000);
+		mtsdram(mem_mcopt1, 0x00000000);
 
 		/*
 		 * Set MB0CF for bank 0.
 		 */
-		mtsdram0(mem_mb0cf, mb0cf[i].reg);
-		mtsdram0(mem_sdtr1, sdtr1);
-		mtsdram0(mem_rtr, compute_rtr(speed, mb0cf[i].rows, 64));
+		mtsdram(mem_mb0cf, mb0cf[i].reg);
+		mtsdram(mem_sdtr1, sdtr1);
+		mtsdram(mem_rtr, compute_rtr(speed, mb0cf[i].rows, 64));
 
 		udelay(200);
 
@@ -203,7 +203,7 @@ void sdram_init(void)
 		 * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst
 		 * read/prefetch.
 		 */
-		mtsdram0(mem_mcopt1, 0x80800000);
+		mtsdram(mem_mcopt1, 0x80800000);
 
 		udelay(10000);
 
@@ -215,10 +215,21 @@ void sdram_init(void)
 #ifdef CONFIG_SDRAM_BANK1
 			u32 b1cr = mb0cf[i].size | mb0cf[i].reg;
 
-			mtsdram0(mem_mcopt1, 0x00000000);
-			mtsdram0(mem_mb1cf, b1cr); /* SDRAM0_B1CR */
-			mtsdram0(mem_mcopt1, 0x80800000);
+			mtsdram(mem_mcopt1, 0x00000000);
+			mtsdram(mem_mb1cf, b1cr); /* SDRAM0_B1CR */
+			mtsdram(mem_mcopt1, 0x80800000);
 			udelay(10000);
+
+			/*
+			 * Check if 2nd bank is really available.
+			 * If the size not equal to the size of the first
+			 * bank, then disable the 2nd bank completely.
+			 */
+			if (get_ram_size((long *)mb0cf[i].size, mb0cf[i].size) !=
+			    mb0cf[i].size) {
+				mtsdram(mem_mb1cf, 0);
+				mtsdram(mem_mcopt1, 0);
+			}
 #endif
 			return;
 		}
diff --git a/cpu/ppc4xx/sdram.h b/cpu/ppc4xx/sdram.h
index 62b5442f3b..4fb9b1ae14 100644
--- a/cpu/ppc4xx/sdram.h
+++ b/cpu/ppc4xx/sdram.h
@@ -29,8 +29,6 @@
 
 #include <config.h>
 
-#define mtsdram0(reg, data)  mtdcr(memcfga,reg);mtdcr(memcfgd,data)
-
 #define ONE_BILLION	1000000000
 
 struct sdram_conf_s {
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 18d3445609..9626b65c88 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -1869,38 +1869,7 @@ ppc405ep_init:
 	ori	r3,r3,CFG_EBC_PB4CR@l
 	mtdcr	ebccfgd,r3
 #endif
-#ifdef CONFIG_TAIHU
-	mfdcr	r4, CPC0_BOOT
-	andi.	r5, r4, CPC0_BOOT_SEP@l
-	bne	strap_0			/* serial eeprom present */
-#endif
-
-#ifndef CFG_CPC0_PCI
-	li	r3,CPC0_PCI_HOST_CFG_EN
-#ifdef CONFIG_BUBINGA
-	/*
-	!-----------------------------------------------------------------------
-	! Check FPGA for PCI internal/external arbitration
-	!   If board is set to internal arbitration, update cpc0_pci
-	!-----------------------------------------------------------------------
-	*/
-	addis	r5,r0,FPGA_REG1@h      /* set offset for FPGA_REG1 */
-	ori	r5,r5,FPGA_REG1@l
-	lbz	r5,0x0(r5)		/* read to get PCI arb selection */
-	andi.	r6,r5,FPGA_REG1_PCI_INT_ARB  /* using internal arbiter ?*/
-	beq	..pci_cfg_set		  /* if not set, then bypass reg write*/
-#endif
-	ori	r3,r3,CPC0_PCI_ARBIT_EN
-#ifdef CONFIG_TAIHU
-	ori	r3,r3,CPC0_PCI_SPE
-#endif
-#else /* CFG_CPC0_PCI */
-	li	r3,CFG_CPC0_PCI
-#endif /* CFG_CPC0_PCI */
-..pci_cfg_set:
-	mtdcr	CPC0_PCI, r3		 /* Enable internal arbiter*/
 
-strap_0:
 	/*
 	!-----------------------------------------------------------------------
 	! Check to see if chip is in bypass mode.
@@ -1966,6 +1935,21 @@ strap_0:
 	bne	_pci_66mhz
 #endif /* CONFIG_TAIHU */
 
+#if defined(CONFIG_ZEUS)
+	mfdcr	r4, CPC0_BOOT
+	andi.	r5, r4, CPC0_BOOT_SEP@l
+	bne	strap_1  	/* serial eeprom present */
+	lis	r3,0x0000
+	addi	r3,r3,0x3030
+	lis	r4,0x8042
+	addi	r4,r4,0x223e
+	b	1f
+strap_1:
+	mfdcr	r3, CPC0_PLLMR0
+	mfdcr	r4, CPC0_PLLMR1
+	b	1f
+#endif
+
 	addis	r3,0,PLLMR0_DEFAULT@h	    /* PLLMR0 default value */
 	ori	r3,r3,PLLMR0_DEFAULT@l	   /* */
 	addis	r4,0,PLLMR1_DEFAULT@h	    /* PLLMR1 default value */
@@ -1982,9 +1966,9 @@ _pci_66mhz:
 strap_1:
 	mfdcr	r3, CPC0_PLLMR0
 	mfdcr	r4, CPC0_PLLMR1
-1:
 #endif /* CONFIG_TAIHU */
 
+1:
 	b	pll_write		  /* Write the CPC0_PLLMR with new value */
 
 pll_done: