X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Fboard%2Fsheldon%2Fsimpc8313%2Fsdram.c;fp=qemu%2Froms%2Fu-boot%2Fboard%2Fsheldon%2Fsimpc8313%2Fsdram.c;h=7c12fe851cb3f279bd52d95fa7d979282680516d;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/roms/u-boot/board/sheldon/simpc8313/sdram.c b/qemu/roms/u-boot/board/sheldon/simpc8313/sdram.c
new file mode 100644
index 000000000..7c12fe851
--- /dev/null
+++ b/qemu/roms/u-boot/board/sheldon/simpc8313/sdram.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) Freescale Semiconductor, Inc. 2006-2007
+ * Copyright (C) Sheldon Instruments, Inc. 2008
+ *
+ * Author: Ron Madrid <info@sheldoninst.com>
+ *
+ * (C) Copyright 2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mpc83xx.h>
+#include <spd_sdram.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/mmu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static long fixed_sdram(void);
+
+#if defined(CONFIG_NAND_SPL)
+void si_wait_i2c(void)
+{
+	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
+
+	while (!(__raw_readb(&im->i2c[0].sr) & 0x02))
+		;
+
+	__raw_writeb(0x00, &im->i2c[0].sr);
+
+	sync();
+
+	return;
+}
+
+void si_read_i2c(u32 lbyte, int count, u8 *buffer)
+{
+	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
+	u32 i;
+	u8 chip = 0x50 << 1; /* boot sequencer I2C */
+	u32 ubyte = (lbyte & 0xff00) >> 8;
+
+	lbyte &= 0xff;
+
+	/*
+	 * Set up controller
+	 */
+	__raw_writeb(0x3f, &im->i2c[0].fdr);
+	__raw_writeb(0x00, &im->i2c[0].adr);
+	__raw_writeb(0x00, &im->i2c[0].sr);
+	__raw_writeb(0x00, &im->i2c[0].dr);
+
+	while (__raw_readb(&im->i2c[0].sr) & 0x20)
+		;
+
+	/*
+	 * Writing address to device
+	 */
+	__raw_writeb(0xb0, &im->i2c[0].cr);
+	sync();
+	__raw_writeb(chip, &im->i2c[0].dr);
+	si_wait_i2c();
+
+	__raw_writeb(0xb0, &im->i2c[0].cr);
+	sync();
+	__raw_writeb(ubyte, &im->i2c[0].dr);
+	si_wait_i2c();
+
+	__raw_writeb(lbyte, &im->i2c[0].dr);
+	si_wait_i2c();
+
+	__raw_writeb(0xb4, &im->i2c[0].cr);
+	sync();
+	__raw_writeb(chip + 1, &im->i2c[0].dr);
+	si_wait_i2c();
+
+	__raw_writeb(0xa0, &im->i2c[0].cr);
+	sync();
+
+	/*
+	 * Dummy read
+	 */
+	__raw_readb(&im->i2c[0].dr);
+
+	si_wait_i2c();
+
+	/*
+	 * Read actual data
+	 */
+	for (i = 0; i < count; i++)
+	{
+		if (i == (count - 2))	/* Reached next to last byte, No ACK */
+			__raw_writeb(0xa8, &im->i2c[0].cr);
+		if (i == (count - 1))	/* Reached last byte, STOP */
+			__raw_writeb(0x88, &im->i2c[0].cr);
+
+		/* Read byte of data */
+		buffer[i] = __raw_readb(&im->i2c[0].dr);
+
+		if (i == (count - 1))
+			break;
+		si_wait_i2c();
+	}
+
+	return;
+}
+#endif /* CONFIG_NAND_SPL */
+
+phys_size_t initdram(int board_type)
+{
+	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
+	volatile fsl_lbc_t *lbc = &im->im_lbc;
+	u32 msize;
+
+	if ((__raw_readl(&im->sysconf.immrbar) & IMMRBAR_BASE_ADDR) != (u32) im)
+		return -1;
+
+	/* DDR SDRAM - Main SODIMM */
+	__raw_writel(CONFIG_SYS_DDR_BASE & LAWBAR_BAR, &im->sysconf.ddrlaw[0].bar);
+
+	msize = fixed_sdram();
+
+	/* Local Bus setup lbcr and mrtpr */
+	__raw_writel(CONFIG_SYS_LBC_LBCR, &lbc->lbcr);
+	__raw_writel(CONFIG_SYS_LBC_MRTPR, &lbc->mrtpr);
+	sync();
+
+	/* return total bus SDRAM size(bytes)  -- DDR */
+	return (msize * 1024 * 1024);
+}
+
+/*************************************************************************
+ *  fixed sdram init -- reads values from boot sequencer I2C
+ ************************************************************************/
+static long fixed_sdram(void)
+{
+	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
+	u32 msizelog2, msize = 1;
+#if defined(CONFIG_NAND_SPL)
+	u32 i;
+	const u8 bytecount = 135;
+	u8 buffer[bytecount];
+	u32 addr, data;
+
+	si_read_i2c(0, bytecount, buffer);
+
+	for (i = 18; i < bytecount; i += 7){
+		addr = (u32)buffer[i];
+		addr <<= 8;
+		addr |= (u32)buffer[i + 1];
+		addr <<= 2;
+		data = (u32)buffer[i + 2];
+		data <<= 8;
+		data |= (u32)buffer[i + 3];
+		data <<= 8;
+		data |= (u32)buffer[i + 4];
+		data <<= 8;
+		data |= (u32)buffer[i + 5];
+
+		__raw_writel(data, (u32 *)(CONFIG_SYS_IMMR + addr));
+	}
+
+	sync();
+
+	/* enable DDR controller */
+	__raw_writel((__raw_readl(&im->ddr.sdram_cfg) | SDRAM_CFG_MEM_EN), &im->ddr.sdram_cfg);
+#endif /* (CONFIG_NAND_SPL) */
+
+	msizelog2 = ((__raw_readl(&im->sysconf.ddrlaw[0].ar) & LAWAR_SIZE) + 1);
+	msize <<= (msizelog2 - 20);
+
+	return msize;
+}