From 5568e613ee38d4bb5dd601cdb2f74ed0d7de9902 Mon Sep 17 00:00:00 2001
From: Stefan Roese <sr@denx.de>
Date: Tue, 22 Nov 2005 13:20:42 +0100
Subject: Add support for Prodrive P3P440 board: - Added onboard PPC440 DDR
 autodetection in cpu/ppc/sdram.c - CFG_FLASH_QUIET_TEST added to use the
 common CFI driver   for bank autodetection Patch by Stefan Roese, 22 Nov 2005

---
 cpu/ppc4xx/405gp_pci.c | 12 ++++++---
 cpu/ppc4xx/sdram.c     | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++
 cpu/ppc4xx/start.S     |  2 ++
 3 files changed, 81 insertions(+), 3 deletions(-)

(limited to 'cpu')

diff --git a/cpu/ppc4xx/405gp_pci.c b/cpu/ppc4xx/405gp_pci.c
index 89be137a86..6a4128cd43 100644
--- a/cpu/ppc4xx/405gp_pci.c
+++ b/cpu/ppc4xx/405gp_pci.c
@@ -431,20 +431,24 @@ static struct pci_controller ppc440_hose = {0};
 void pci_440_init (struct pci_controller *hose)
 {
 	int reg_num = 0;
-	unsigned long strap;
 
+#ifndef CONFIG_DISABLE_PISE_TEST
 	/*--------------------------------------------------------------------------+
 	 * The PCI initialization sequence enable bit must be set ... if not abort
 	 * pci setup since updating the bit requires chip reset.
 	 *--------------------------------------------------------------------------*/
-#if defined (CONFIG_440GX) || defined (CONFIG_440EP) || defined(CONFIG_440GR)
+#if defined(CONFIG_440GX)
+	unsigned long strap;
+
 	mfsdr(sdr_sdstp1,strap);
 	if ( (strap & 0x00010000) == 0 ){
 		printf("PCI: SDR0_STRP1[PISE] not set.\n");
 		printf("PCI: Configuration aborted.\n");
 		return;
 	}
-#else
+#elif defined(CONFIG_440GP)
+	unsigned long strap;
+
 	strap = mfdcr(cpc0_strp1);
 	if( (strap & 0x00040000) == 0 ){
 		printf("PCI: CPC0_STRP1[PISE] not set.\n");
@@ -452,6 +456,8 @@ void pci_440_init (struct pci_controller *hose)
 		return;
 	}
 #endif
+#endif /* CONFIG_DISABLE_PISE_TEST */
+
 	/*--------------------------------------------------------------------------+
 	 * PCI controller init
 	 *--------------------------------------------------------------------------*/
diff --git a/cpu/ppc4xx/sdram.c b/cpu/ppc4xx/sdram.c
index d1ad21203d..e9548cdcf3 100644
--- a/cpu/ppc4xx/sdram.c
+++ b/cpu/ppc4xx/sdram.c
@@ -1,4 +1,7 @@
 /*
+ * (C) Copyright 2005
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
  * (C) Copyright 2002-2004
  * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
  *
@@ -39,6 +42,7 @@ struct sdram_conf_s {
 
 typedef struct sdram_conf_s sdram_conf_t;
 
+#ifndef CFG_SDRAM_TABLE
 sdram_conf_t mb0cf[] = {
 	{(128 << 20), 0x000A4001},      /* (0-128MB) Address Mode 3, 13x10(4) */
 	{(64 << 20),  0x00084001},      /* (0-64MB) Address Mode 3, 13x9(4)   */
@@ -46,9 +50,18 @@ sdram_conf_t mb0cf[] = {
 	{(16 << 20),  0x00046001},      /* (0-16MB) Address Mode 4, 12x8(4)   */
 	{(4 << 20),   0x00008001},      /* (0-4MB) Address Mode 5, 11x8(2)    */
 };
+#else
+sdram_conf_t mb0cf[] = CFG_SDRAM_TABLE;
+#endif
+
 #define	N_MB0CF (sizeof(mb0cf) / sizeof(mb0cf[0]))
 
 
+#ifndef CONFIG_440
+
+/*
+ * Autodetect onboard SDRAM on 405 platforms
+ */
 void sdram_init(void)
 {
 	ulong sdtr1;
@@ -105,4 +118,61 @@ void sdram_init(void)
 	}
 }
 
+#else /* CONFIG_440 */
+
+/*
+ * Autodetect onboard DDR SDRAM on 440 platforms
+ *
+ * NOTE: Some of the hardcoded values are hardware dependant,
+ *       so this should be extended for other future boards
+ *       using this routine!
+ */
+long int initdram(int board_type)
+{
+	int i;
+
+	for (i=0; i<N_MB0CF; i++) {
+		/*
+		 * Disable memory controller.
+		 */
+		mtsdram(mem_cfg0, 0x00000000);
+
+		/*
+		 * Setup some default
+		 */
+		mtsdram(mem_uabba, 0x00000000);	/* ubba=0 (default)             */
+		mtsdram(mem_slio, 0x00000000);	/* rdre=0 wrre=0 rarw=0         */
+		mtsdram(mem_devopt, 0x00000000); /* dll=0 ds=0 (normal)		*/
+		mtsdram(mem_wddctr, 0x00000000); /* wrcp=0 dcd=0		*/
+		mtsdram(mem_clktr, 0x40000000);	/* clkp=1 (90 deg wr) dcdt=0    */
+
+		/*
+		 * Following for CAS Latency = 2.5 @ 133 MHz PLB
+		 */
+		mtsdram(mem_b0cr, mb0cf[i].reg);
+		mtsdram(mem_tr0, 0x41094012);
+		mtsdram(mem_tr1, 0x80800800);	/* SS=T2 SL=STAGE 3 CD=1 CT=0x00*/
+		mtsdram(mem_rtr, 0x7e000000);	/* Interval 15.20µs @ 133MHz PLB*/
+		mtsdram(mem_cfg1, 0x00000000);	/* Self-refresh exit, disable PM*/
+		udelay(400);			/* Delay 200 usecs (min)	*/
+
+		/*
+		 * Enable the controller, then wait for DCEN to complete
+		 */
+		mtsdram(mem_cfg0, 0x86000000);	/* DCEN=1, PMUD=1, 64-bit       */
+		udelay(10000);
+
+		if (get_ram_size(0, mb0cf[i].size) == mb0cf[i].size) {
+			/*
+			 * OK, size detected -> all done
+			 */
+			return mb0cf[i].size;
+		}
+	}
+
+	return 0;				/* nothing found !		*/
+}
+
+#endif /* CONFIG_440 */
+
 #endif /* CONFIG_SDRAM_BANK0 */
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index f434e207d9..8f7e817eaa 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -444,6 +444,8 @@ __440gx_msr_continue:
 	stw	r0,+12(r1)		/* Save return addr (underflow vect) */
 
 	GET_GOT
+
+	bl	cpu_init_f	/* run low-level CPU init code	   (from Flash) */
 	bl	board_init_f
 
 #endif /* CONFIG_440 */
-- 
cgit