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+/*
+ * (C) Copyright 2005-2007
+ * Samsung Electronics,
+ * Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ * Derived from omap2420
+ *
+ * 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/arch/omap2420.h>
+#include <asm/io.h>
+#include <asm/arch/bits.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/mem.h>
+#include <asm/arch/clocks.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/sys_info.h>
+
+#include "mem.h"
+
+/************************************************************
+ * sdelay() - simple spin loop. Will be constant time as
+ * its generally used in 12MHz bypass conditions only. This
+ * is necessary until timers are accessible.
+ *
+ * not inline to increase chances its in cache when called
+ *************************************************************/
+void sdelay(unsigned long loops)
+{
+ __asm__("1:\n" "subs %0, %1, #1\n"
+ "bne 1b":"=r" (loops):"0"(loops));
+}
+
+/********************************************************************
+ * prcm_init() - inits clocks for PRCM as defined in clocks.h
+ * (config II default).
+ * -- called from SRAM, or Flash (using temp SRAM stack).
+ ********************************************************************/
+void prcm_init(void) { }
+
+/**************************************************************************
+ * make_cs1_contiguous() - for es2 and above remap cs1 behind cs0 to allow
+ * command line mem=xyz use all memory with out discontigious support
+ * compiled in. Could do it at the ATAG, but there really is two banks...
+ * Called as part of 2nd phase DDR init.
+ **************************************************************************/
+void make_cs1_contiguous(void)
+{
+ u32 size, a_add_low, a_add_high;
+
+ size = get_sdr_cs_size(SDRC_CS0_OSET);
+ size /= SZ_32M; /* find size to offset CS1 */
+ a_add_high = (size & 3) << 8; /* set up low field */
+ a_add_low = (size & 0x3C) >> 2; /* set up high field */
+ __raw_writel((a_add_high | a_add_low), SDRC_CS_CFG);
+
+}
+
+/********************************************************
+ * mem_ok() - test used to see if timings are correct
+ * for a part. Helps in gussing which part
+ * we are currently using.
+ *******************************************************/
+u32 mem_ok(void)
+{
+ u32 val1, val2;
+ u32 pattern = 0x12345678;
+
+ /* clear pos A */
+ __raw_writel(0x0, OMAP2420_SDRC_CS0 + 0x400);
+ /* pattern to pos B */
+ __raw_writel(pattern, OMAP2420_SDRC_CS0);
+ /* remove pattern off the bus */
+ __raw_writel(0x0, OMAP2420_SDRC_CS0 + 4);
+ /* get pos A value */
+ val1 = __raw_readl(OMAP2420_SDRC_CS0 + 0x400);
+ val2 = __raw_readl(OMAP2420_SDRC_CS0); /* get val2 */
+
+ /* see if pos A value changed */
+ if ((val1 != 0) || (val2 != pattern))
+ return (0);
+ else
+ return (1);
+}
+
+/********************************************************
+ * sdrc_init() - init the sdrc chip selects CS0 and CS1
+ * - early init routines, called from flash or
+ * SRAM.
+ *******************************************************/
+void sdrc_init(void)
+{
+#define EARLY_INIT 1
+ /* only init up first bank here */
+ do_sdrc_init(SDRC_CS0_OSET, EARLY_INIT);
+}
+
+/*************************************************************************
+ * do_sdrc_init(): initialize the SDRAM for use.
+ * -called from low level code with stack only.
+ * -code sets up SDRAM timing and muxing for 2422 or 2420.
+ * -optimal settings can be placed here, or redone after i2c
+ * inspection of board info
+ *
+ * This is a bit ugly, but should handle all memory moduels
+ * used with the APOLLON. The first time though this code from s_init()
+ * we configure the first chip select. Later on we come back and
+ * will configure the 2nd chip select if it exists.
+ *
+ **************************************************************************/
+void do_sdrc_init(u32 offset, u32 early)
+{
+}
+
+/*****************************************************
+ * gpmc_init(): init gpmc bus
+ * Init GPMC for x16, MuxMode (SDRAM in x32).
+ * This code can only be executed from SRAM or SDRAM.
+ *****************************************************/
+void gpmc_init(void)
+{
+ u32 mux = 0, mtype, mwidth, rev, tval;
+
+ rev = get_cpu_rev();
+ if (rev == CPU_2420_2422_ES1)
+ tval = 1;
+ else
+ tval = 0; /* disable bit switched meaning */
+
+ /* global settings */
+ __raw_writel(0x10, GPMC_SYSCONFIG); /* smart idle */
+ __raw_writel(0x0, GPMC_IRQENABLE); /* isr's sources masked */
+ __raw_writel(tval, GPMC_TIMEOUT_CONTROL); /* timeout disable */
+#ifdef CFG_NAND_BOOT
+ /* set nWP, disable limited addr */
+ __raw_writel(0x001, GPMC_CONFIG);
+#else
+ /* set nWP, disable limited addr */
+ __raw_writel(0x111, GPMC_CONFIG);
+#endif
+
+ /* discover bus connection from sysboot */
+ if (is_gpmc_muxed() == GPMC_MUXED)
+ mux = BIT9;
+ mtype = get_gpmc0_type();
+ mwidth = get_gpmc0_width();
+
+ /* setup cs0 */
+ __raw_writel(0x0, GPMC_CONFIG7_0); /* disable current map */
+ sdelay(1000);
+
+#ifdef CFG_NOR_BOOT
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG1_3, GPMC_CONFIG1_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG2_3, GPMC_CONFIG2_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG3_3, GPMC_CONFIG3_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG4_3, GPMC_CONFIG4_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG5_3, GPMC_CONFIG5_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG6_3, GPMC_CONFIG6_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG7_3, GPMC_CONFIG7_0);
+#else
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG1_0 | mux | mtype | mwidth,
+ GPMC_CONFIG1_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_0);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_0);
+#endif
+ sdelay(2000);
+
+ /* setup cs1 */
+ __raw_writel(0, GPMC_CONFIG7_1); /* disable any mapping */
+ sdelay(1000);
+
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG1_1, GPMC_CONFIG1_1);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG2_1, GPMC_CONFIG2_1);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG3_1, GPMC_CONFIG3_1);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG4_1, GPMC_CONFIG4_1);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG5_1, GPMC_CONFIG5_1);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG6_1, GPMC_CONFIG6_1);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG7_1, GPMC_CONFIG7_1);
+ sdelay(2000);
+
+ /* setup cs2 */
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG1_0 | mux | mtype | mwidth,
+ GPMC_CONFIG1_2);
+ /* It's same as cs 0 */
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_2);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_2);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_2);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_2);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_2);
+#ifdef CFG_NOR_BOOT
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_2);
+#else
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG7_2, GPMC_CONFIG7_2);
+#endif
+
+#ifndef CFG_NOR_BOOT
+ /* setup cs3 */
+ __raw_writel(0, GPMC_CONFIG7_3); /* disable any mapping */
+ sdelay(1000);
+
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG1_3, GPMC_CONFIG1_3);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG2_3, GPMC_CONFIG2_3);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG3_3, GPMC_CONFIG3_3);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG4_3, GPMC_CONFIG4_3);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG5_3, GPMC_CONFIG5_3);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG6_3, GPMC_CONFIG6_3);
+ __raw_writel(APOLLON_24XX_GPMC_CONFIG7_3, GPMC_CONFIG7_3);
+#endif
+
+#ifndef ASYNC_NOR
+ __raw_writew(0xaa, (APOLLON_CS3_BASE + 0xaaa));
+ __raw_writew(0x55, (APOLLON_CS3_BASE + 0x554));
+ __raw_writew(0xc0, (APOLLON_CS3_BASE | SYNC_NOR_VALUE));
+#endif
+ sdelay(2000);
+}