[PATCH] Add AMCC Acadia (405EZ) eval board support

This patch adds support for the new AMCC Acadia eval board.

Please note that this Acadia/405EZ support is still in a beta stage.
Still lot's of cleanup needed but we need a preliminary release now.

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

1 files changed, 564 insertions, 0 deletions

diff --git a/board/amcc/acadia/memory.c b/board/amcc/acadia/memory.c
new file mode 100644
index 0000000..0f1de71
--- /dev/null
+++ b/board/amcc/acadia/memory.c
@@ -0,0 +1,564 @@
+/*
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+
+#define CRAM_BANK0_BASE 		0x0
+#define CRAM_DIDR			0x00100000
+#define	MICRON_MT45W8MW16BGX_CRAM_ID	0x1b431b43
+#define	MICRON_MT45W8MW16BGX_CRAM_ID2	0x13431343
+#define	MICRON_DIDR_VENDOR_ID		0x00030003	/* 00011b */
+#define	CRAM_DIDR_VENDOR_ID_MASK	0x001f001f	/* DIDR[4:0] */
+#define	CRAM_DEVID_NOT_SUPPORTED	0x00000000
+
+#define PSRAM_PASS	0x50415353	/* "PASS" */
+#define PSRAM_FAIL	0x4641494C	/* "FAIL" */
+
+static u32 is_cram_inited(void);
+static u32 is_cram(void);
+static long int cram_init(u32);
+static void cram_bcr_write(u32);
+void udelay (unsigned long);
+
+void sdram_init(void)
+{
+	volatile unsigned long spr_reg;
+
+	/*
+	 * If CRAM not initialized or CRAM looks initialized because this
+	 * is after a warm reboot then set SPRG7 to indicate CRAM needs
+	 * initialization.  Note that CRAM is initialized by the SPI and
+	 * NAND preloader.
+	 */
+	spr_reg = (volatile unsigned long) mfspr(SPRG6);
+	if ((is_cram_inited() != 1) || (spr_reg != LOAK_SPL)) {
+		mtspr(SPRG7, LOAK_NONE);	/* "NONE" */
+	}
+
+#if 1
+	/*
+	 * When running the NAND SPL, the normal EBC configuration is not
+	 * done, so We need to enable EPLD access on EBC_CS_2 and the memory
+	 * on EBC_CS_3
+	 */
+
+	/* Enable CPLD - Needed for PSRAM Access */
+
+
+	/* Init SDRAM by setting EBC Bank 3 for PSRAM */
+	mtebc(pb1ap, CFG_EBC_PB1AP);
+	mtebc(pb1cr, CFG_EBC_PB1CR);
+
+	mtebc(pb2ap, CFG_EBC_PB2AP);
+	mtebc(pb2cr, CFG_EBC_PB2CR);
+
+	/* pre-boot loader code: we are in OCM */
+	mtspr(SPRG6, LOAK_SPL);	/* "SPL " */
+	mtspr(SPRG7, LOAK_OCM);	/* "OCM " */
+#endif
+
+	return;
+}
+
+static void cram_bcr_write(u32 wr_val)
+{
+	u32 tmp_reg;
+	u32 val;
+	volatile u32 gpio_reg;
+
+	/* # Program CRAM write */
+
+	/*
+	 * set CRAM_CRE = 0x1
+	 * set wr_val = wr_val << 2
+	 */
+	gpio_reg = in32(GPIO1_OR);
+	out32(GPIO1_OR,  gpio_reg | 0x00000400);
+	wr_val = wr_val << 2;
+	/* wr_val = 0x1c048; */
+
+
+	/*
+	 * # stop PLL clock before programming CRAM
+	 * set EPLD0_MUX_CTL.OESPR3 = 1
+	 * delay 2
+	 */
+
+
+	/*
+	 * # CS1
+	 * read 0x00200000
+	 * #shift 2 bit left before write
+	 * set val = wr_val + 0x00200000
+	 * write dmem val 0
+	 * read 0x00200000 val
+	 * print val/8x
+	 */
+	tmp_reg = in32(0x00200000);
+	val = wr_val + 0x00200000;
+	/* val = 0x0021c048; */
+	out32(val, 0x0000);
+	udelay(100000);
+	val = in32(0x00200000);
+
+	debug("CRAM VAL: %x for CS1 ", val);
+
+	/*
+	 * # CS2
+	 * read 0x02200000
+	 * #shift 2 bit left before write
+	 * set val = wr_val + 0x02200000
+	 * write dmem val 0
+	 * read 0x02200000 val
+	 * print val/8x
+	 */
+	tmp_reg = in32(0x02200000);
+	val = wr_val + 0x02200000;
+	/* val = 0x0221c048; */
+	out32(val, 0x0000);
+	udelay(100000);
+	val = in32(0x02200000);
+
+	debug("CRAM VAL: %x for CS2 ", val);
+
+	/*
+	 * # Start PLL clock before programming CRAM
+	 * set EPLD0_MUX_CTL.OESPR3 = 0
+	 */
+
+
+	/*
+	 * set CRAMCR = 0x1
+	 */
+	gpio_reg = in32(GPIO1_OR);
+	out32(GPIO1_OR,  gpio_reg | 0x00000400);
+
+	/*
+	 * # read CRAM config BCR ( bit19:18 = 10b )
+	 * #read 0x00200000
+	 * # 1001_1001_0001_1111 ( 991f ) =>
+	 * #10_0110_0100_0111_1100  =>   2647c => 0022647c
+	 * #0011_0010_0011_1110 (323e)
+	 * #
+	 */
+
+	/*
+	 * set EPLD0_MUX_CTL.CRAMCR = 0x0
+	 */
+	gpio_reg = in32(GPIO1_OR);
+	out32(GPIO1_OR,  gpio_reg & 0xFFFFFBFF);
+	return;
+}
+
+static u32 is_cram_inited()
+{
+	volatile unsigned long spr_reg;
+
+	/*
+ 	 * If CRAM is initialized already, then don't reinitialize it again.
+	 * In the case of NAND boot and SPI boot, CRAM will already be
+	 * initialized by the pre-loader
+	 */
+	spr_reg = (volatile unsigned long) mfspr(SPRG7);
+	if (spr_reg == LOAK_CRAM) {
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
+/******
+ * return 0 if not CRAM
+ * return 1 if CRAM and it's already inited by preloader
+ * else return cram_id (CRAM Device Identification Register)
+ ******/
+static u32 is_cram(void)
+{
+	u32 gpio_TCR, gpio_OSRL, gpio_OR, gpio_ISR1L;
+	volatile u32 gpio_reg;
+	volatile u32 cram_id = 0;
+
+	if (is_cram_inited() == 1) {
+		/* this is CRAM and it is already inited (by preloader) */
+		cram_id = 1;
+	} else {
+		/*
+		 * # CRAM CLOCK
+		 * set GPIO0_TCR.G8 = 1
+		 * set GPIO0_OSRL.G8 = 0
+		 * set GPIO0_OR.G8 = 0
+		 */
+		gpio_reg = in32(GPIO0_TCR);
+		gpio_TCR = gpio_reg;
+		out32(GPIO0_TCR, gpio_reg | 0x00800000);
+		gpio_reg = in32(GPIO0_OSRL);
+		gpio_OSRL = gpio_reg;
+		out32(GPIO0_OSRL, gpio_reg & 0xffffbfff);
+		gpio_reg = in32(GPIO0_OR);
+		gpio_OR = gpio_reg;
+		out32(GPIO0_OR, gpio_reg & 0xff7fffff);
+
+		/*
+		 * # CRAM Addreaa Valid
+		 * set GPIO0_TCR.G10 = 1
+		 * set GPIO0_OSRL.G10 = 0
+		 * set GPIO0_OR.G10 = 0
+		 */
+		gpio_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, gpio_reg | 0x00200000);
+		gpio_reg = in32(GPIO0_OSRL);
+		out32(GPIO0_OSRL, gpio_reg & 0xfffffbff);
+		gpio_reg = in32(GPIO0_OR);
+		out32(GPIO0_OR, gpio_reg & 0xffdfffff);
+
+		/*
+		 * # config input (EBC_WAIT)
+		 * set GPIO0_ISR1L.G9 = 1
+		 * set GPIO0_TCR.G9 = 0
+		 */
+		gpio_reg = in32(GPIO0_ISR1L);
+		gpio_ISR1L = gpio_reg;
+		out32(GPIO0_ISR1L, gpio_reg | 0x00001000);
+		gpio_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, gpio_reg & 0xffbfffff);
+
+		/*
+		 * Enable CRE to read Registers
+		 * set GPIO0_TCR.21 = 1
+		 * set GPIO1_OR.21 = 1
+		 */
+		gpio_reg = in32(GPIO1_TCR);
+		out32(GPIO1_TCR, gpio_reg | 0x00000400);
+
+		gpio_reg = in32(GPIO1_OR);
+		out32(GPIO1_OR,  gpio_reg | 0x00000400);
+
+
+
+
+		/* Read Version ID */
+		cram_id = (volatile u32) in32(CRAM_BANK0_BASE+CRAM_DIDR);
+		udelay(100000);
+
+		asm volatile("	sync");
+		asm volatile("	eieio");
+
+		debug("Cram ID: %X ", cram_id);
+
+		switch (cram_id) {
+		case MICRON_MT45W8MW16BGX_CRAM_ID:
+		case MICRON_MT45W8MW16BGX_CRAM_ID2:
+			/* supported CRAM vendor/part */
+			break;
+		case CRAM_DEVID_NOT_SUPPORTED:
+		default:
+			/* check for DIDR Vendor ID of Micron */
+			if ((cram_id & CRAM_DIDR_VENDOR_ID_MASK) ==
+						MICRON_DIDR_VENDOR_ID)
+			{
+				/* supported CRAM vendor */
+				break;
+			}
+			/* this is not CRAM or not supported CRAM vendor/part */
+			cram_id = 0;
+			/*
+			 * reset the GPIO registers to the values that were
+			 * there before this routine
+			 */
+			out32(GPIO0_TCR, gpio_TCR);
+			out32(GPIO0_OSRL, gpio_OSRL);
+			out32(GPIO0_OR, gpio_OR);
+			out32(GPIO0_ISR1L, gpio_ISR1L);
+			break;
+		}
+	}
+
+	return cram_id;
+}
+
+static long int cram_init(u32 already_inited)
+{
+	volatile u32 tmp_reg;
+	u32 cram_wr_val;
+
+	if (already_inited == 0) return 0;
+
+	/*
+	 * If CRAM is initialized already, then don't reinitialize it again.
+	 * In the case of NAND boot and SPI boot, CRAM will already be
+	 * initialized by the pre-loader
+	 */
+	if (already_inited != 1)
+	{
+		/*
+		 * #o CRAM Card
+		 * #  - CRAMCRE @reg16 = 1; for CRAM to use
+		 * #  - CRAMCRE @reg16 = 0; for CRAM to program
+		 *
+		 * # enable CRAM SEL, move from setEPLD.cmd
+		 * set EPLD0_MUX_CTL.OECRAM = 0
+		 * set EPLD0_MUX_CTL.CRAMCR = 1
+		 * set EPLD0_ETHRSTBOOT.SLCRAM = 0
+		 * #end
+		 */
+
+
+		/*
+		 * #1. EBC need to program READY, CLK, ADV for ASync mode
+		 * # config output
+		 */
+
+		/*
+		 * # CRAM CLOCK
+		 * set GPIO0_TCR.G8 = 1
+		 * set GPIO0_OSRL.G8 = 0
+		 * set GPIO0_OR.G8 = 0
+		 */
+		tmp_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, tmp_reg | 0x00800000);
+		tmp_reg = in32(GPIO0_OSRL);
+		out32(GPIO0_OSRL, tmp_reg & 0xffffbfff);
+		tmp_reg = in32(GPIO0_OR);
+		out32(GPIO0_OR, tmp_reg & 0xff7fffff);
+
+		/*
+		 * # CRAM Addreaa Valid
+		 * set GPIO0_TCR.G10 = 1
+		 * set GPIO0_OSRL.G10 = 0
+		 * set GPIO0_OR.G10 = 0
+		 */
+		tmp_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, tmp_reg | 0x00200000);
+		tmp_reg = in32(GPIO0_OSRL);
+		out32(GPIO0_OSRL, tmp_reg & 0xfffffbff);
+		tmp_reg = in32(GPIO0_OR);
+		out32(GPIO0_OR, tmp_reg & 0xffdfffff);
+
+		/*
+		 * # config input (EBC_WAIT)
+		 * set GPIO0_ISR1L.G9 = 1
+		 * set GPIO0_TCR.G9 = 0
+		 */
+		tmp_reg = in32(GPIO0_ISR1L);
+		out32(GPIO0_ISR1L, tmp_reg | 0x00001000);
+		tmp_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, tmp_reg & 0xffbfffff);
+
+		/*
+		 * # config CS4 from GPIO
+		 * set GPIO0_TCR.G0 = 1
+		 * set GPIO0_OSRL.G0 = 1
+		 */
+		tmp_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, tmp_reg | 0x80000000);
+		tmp_reg = in32(GPIO0_OSRL);
+		out32(GPIO0_OSRL, tmp_reg | 0x40000000);
+
+		/*
+		 * #2. EBC in Async mode
+		 * # set EBC0_PB1AP = 0x078f0ec0
+		 * set EBC0_PB1AP = 0x078f1ec0
+		 * set EBC0_PB2AP = 0x078f1ec0
+		 */
+		mtebc(pb1ap, 0x078F1EC0);
+		mtebc(pb2ap, 0x078F1EC0);
+
+		/*
+		 * #set EBC0_PB1CR = 0x000bc000
+		 * #enable CS2 for CRAM
+		 * set EBC0_PB2CR = 0x020bc000
+		 */
+		mtebc(pb1cr, 0x000BC000);
+		mtebc(pb2cr, 0x020BC000);
+
+		/*
+		 * #3. set CRAM in Sync mode
+		 * #exec cm_bcr_write.cmd { 0x701f }
+		 * #3. set CRAM in Sync mode (full drv strength)
+		 * exec cm_bcr_write.cmd { 0x701F }
+		 */
+		cram_wr_val = 0x7012;	/* CRAM burst setting */
+		cram_bcr_write(cram_wr_val);
+
+		/*
+		 * #4. EBC in Sync mode
+		 * #set EBC0_PB1AP = 0x9f800fc0
+		 * #set EBC0_PB1AP = 0x900001c0
+		 * set EBC0_PB2AP = 0x9C0201c0
+		 * set EBC0_PB2AP = 0x9C0201c0
+		 */
+		mtebc(pb1ap, 0x9C0201C0);
+		mtebc(pb2ap, 0x9C0201C0);
+
+		/*
+		 * #5. EBC need to program READY, CLK, ADV for Sync mode
+		 * # config output
+		 * set GPIO0_TCR.G8 = 1
+		 * set GPIO0_OSRL.G8 = 1
+		 * set GPIO0_TCR.G10 = 1
+		 * set GPIO0_OSRL.G10 = 1
+		 */
+		tmp_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, tmp_reg | 0x00800000);
+		tmp_reg = in32(GPIO0_OSRL);
+		out32(GPIO0_OSRL, tmp_reg | 0x00004000);
+		tmp_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, tmp_reg | 0x00200000);
+		tmp_reg = in32(GPIO0_OSRL);
+		out32(GPIO0_OSRL, tmp_reg | 0x00000400);
+
+		/*
+		 * # config input
+		 * set GPIO0_ISR1L.G9 = 1
+		 * set GPIO0_TCR.G9 = 0
+		 */
+		tmp_reg = in32(GPIO0_ISR1L);
+		out32(GPIO0_ISR1L, tmp_reg | 0x00001000);
+		tmp_reg = in32(GPIO0_TCR);
+		out32(GPIO0_TCR, tmp_reg & 0xffbfffff);
+
+		/*
+		 * # config EBC to use RDY
+		 * set SDR0_ULTRA0.EBCREN = 1
+		 */
+		mfsdr(sdrultra0, tmp_reg);
+		mtsdr(sdrultra0, tmp_reg | 0x04000000);
+
+		/*
+		 * set EPLD0_MUX_CTL.OESPR3 = 0
+		 */
+
+
+		mtspr(SPRG7, LOAK_CRAM);	/* "CRAM" */
+	} /* if (already_inited != 1) */
+
+	return (64 * 1024 * 1024);
+}
+
+/******
+ * return 0 if not PSRAM
+ * return 1 if is PSRAM
+ ******/
+static int is_psram(u32 addr)
+{
+	u32 test_pattern = 0xdeadbeef;
+	volatile u32 readback;
+
+	if (addr == CFG_SDRAM_BASE) {
+		/* This is to temp enable OE for PSRAM */
+		out16(EPLD_BASE+EPLD_MUXOE, 0x7f0f);
+		udelay(10000);
+	}
+
+	out32(addr, test_pattern);
+	asm volatile("	sync");
+	asm volatile("	eieio");
+
+	readback = (volatile u32) in32(addr);
+	asm volatile("	sync");
+	asm volatile("	eieio");
+	if (readback == test_pattern) {
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
+static long int psram_init(void)
+{
+	u32 readback;
+	long psramsize = 0;
+	int i;
+
+	/* This is to temp enable OE for PSRAM */
+	out16(EPLD_BASE+EPLD_MUXOE, 0x7f0f);
+	udelay(10000);
+
+	/*
+	 * PSRAM bank 1: read then write to address 0x00000000
+	 */
+	for (i = 0; i < 100; i++) {
+		if (is_psram(CFG_SDRAM_BASE + (i*256)) == 1) {
+			readback = PSRAM_PASS;
+		} else {
+			readback = PSRAM_FAIL;
+			break;
+		}
+	}
+	if (readback == PSRAM_PASS) {
+		debug("psram_init(bank0): pass\n");
+		psramsize = (16 * 1024 * 1024);
+	} else {
+		debug("psram_init(bank0): fail\n");
+		return 0;
+	}
+
+#if 0
+	/*
+	 * PSRAM bank 1: read then write to address 0x01000000
+	 */
+	for (i = 0; i < 100; i++) {
+		if (is_psram((1 << 24) + (i*256)) == 1) {
+			readback = PSRAM_PASS;
+		} else {
+			readback = PSRAM_FAIL;
+			break;
+		}
+	}
+	if (readback == PSRAM_PASS) {
+		debug("psram_init(bank1): pass\n");
+		psramsize = psramsize + (16 * 1024 * 1024);
+	}
+#endif
+
+	mtspr(SPRG7, LOAK_PSRAM);	/* "PSRA" - PSRAM */
+
+	return psramsize;
+}
+
+long int initdram(int board_type)
+{
+	long int sram_size;
+	u32 cram_inited;
+
+	/* Determine Attached Memory Expansion Card*/
+	cram_inited = is_cram();
+	if (cram_inited != 0) {					/* CRAM */
+		debug("CRAM Expansion Card attached\n");
+		sram_size = cram_init(cram_inited);
+	} else if (is_psram(CFG_SDRAM_BASE+4) == 1) {		/* PSRAM */
+		debug("PSRAM Expansion Card attached\n");
+		sram_size = psram_init();
+	} else { 						/* no SRAM */
+		debug("No Memory Card Attached!!\n");
+		sram_size = 0;
+	}
+
+	return sram_size;
+}
+
+int testdram(void)
+{
+	return (0);
+}