1 files changed, 452 insertions, 0 deletions
diff --git a/board/omap1610inn/lowlevel_init.S b/board/omap1610inn/lowlevel_init.S
new file mode 100644
index 000000000..eaf1742cc
--- /dev/null
+++ b/board/omap1610inn/lowlevel_init.S
@@ -0,0 +1,452 @@
+/*
+ * Board specific setup info
+ *
+ * (C) Copyright 2003
+ * Texas Instruments, <www.ti.com>
+ * Kshitij Gupta <Kshitij@ti.com>
+ *
+ * Modified for OMAP 1610 H2 board by Nishant Kamat, Jan 2004
+ *
+ * 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 <config.h>
+#include <version.h>
+
+#if defined(CONFIG_OMAP1610)
+#include <./configs/omap1510.h>
+#endif
+
+
+_TEXT_BASE:
+	.word	TEXT_BASE	/* sdram load addr from config.mk */
+
+.globl lowlevel_init
+lowlevel_init:
+
+
+	/*------------------------------------------------------*
+	 *mask all IRQs by setting all bits in the INTMR default*
+	 *------------------------------------------------------*/
+	mov	r1, #0xffffffff
+	ldr	r0, =REG_IHL1_MIR
+	str	r1, [r0]
+	ldr	r0, =REG_IHL2_MIR
+	str	r1, [r0]
+
+	/*------------------------------------------------------*
+	 * Set up ARM CLM registers (IDLECT1)                   *
+	 *------------------------------------------------------*/
+	ldr	r0,	REG_ARM_IDLECT1
+	ldr	r1,	VAL_ARM_IDLECT1
+	str	r1,	[r0]
+
+	/*------------------------------------------------------*
+	 * Set up ARM CLM registers (IDLECT2)  		        *
+	 *------------------------------------------------------*/
+	ldr	r0,	REG_ARM_IDLECT2
+	ldr	r1,	VAL_ARM_IDLECT2
+	str	r1,	[r0]
+
+	/*------------------------------------------------------*
+	 * Set up ARM CLM registers (IDLECT3)		        *
+	 *------------------------------------------------------*/
+	ldr	r0,	REG_ARM_IDLECT3
+	ldr	r1,	VAL_ARM_IDLECT3
+	str	r1,	[r0]
+
+#ifdef CONFIG_CS_AUTOBOOT		/* do the setup depending on boot mode */
+	ldr	r0, CONF_STATUS
+	ldr	r1, [r0]
+	tst	r1, #0x02
+	beq	disable_wd		/* booting from RAM, skip setup */
+#endif
+
+	mov	r1,	#0x01		/* PER_EN bit */
+	ldr	r0,	REG_ARM_RSTCT2
+	strh	r1,	[r0]		/* CLKM; Peripheral reset. */
+
+	/* Set CLKM to Sync-Scalable	*/
+	/* I supposedly need to enable the dsp clock before switching */
+	mov	r1,	#0x0000
+	ldr	r0,	REG_ARM_SYSST
+	strh	r1,	[r0]
+	mov	r0,	#0x400
+1:
+	subs	r0,	r0,	#0x1	/* wait for any bubbles to finish */
+	bne	1b
+	ldr	r1,	VAL_ARM_CKCTL
+	ldr	r0,	REG_ARM_CKCTL
+	strh	r1,	[r0]
+
+	/* a few nops to let settle */
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+
+	/* setup DPLL 1 */
+	/* Ramp up the clock to 96Mhz */
+	ldr	r1,	VAL_DPLL1_CTL
+	ldr	r0,	REG_DPLL1_CTL
+	strh	r1,	[r0]
+	ands	r1,	r1,	#0x10	/* Check if PLL is enabled. */
+	beq	lock_end	/* Do not look for lock if BYPASS selected */
+2:
+	ldrh	r1,	[r0]
+	ands	r1,	r1,	#0x01	/*	Check the LOCK bit.*/
+	beq 2b			/*	loop until bit goes hi. */
+lock_end:
+
+
+	/*------------------------------------------------------*
+	 * Turn off the watchdog during init...			*
+ 	 *------------------------------------------------------*/
+disable_wd:
+	ldr	r0,	REG_WATCHDOG
+	ldr	r1,	WATCHDOG_VAL1
+	str	r1,	[r0]
+	ldr	r1,	WATCHDOG_VAL2
+	str	r1,	[r0]
+	ldr	r0,	REG_WSPRDOG
+	ldr	r1,	WSPRDOG_VAL1
+	str	r1,	[r0]
+	ldr	r0,	REG_WWPSDOG
+
+watch1Wait:
+	ldr	r1,	[r0]
+	tst	r1,	#0x10
+	bne	watch1Wait
+
+	ldr	r0,	REG_WSPRDOG
+	ldr	r1,	WSPRDOG_VAL2
+	str	r1,	[r0]
+	ldr	r0,	REG_WWPSDOG
+watch2Wait:
+	ldr	r1,	[r0]
+	tst	r1,	#0x10
+	bne	watch2Wait
+
+
+	/* Set memory timings corresponding to the new clock speed */
+
+	/* Check execution location to determine current execution location
+	 * and branch to appropriate initialization code.
+	 */
+	/* Load physical SDRAM base. */
+	mov 	r0, 	#0x10000000
+	/* Get current execution location. */
+	mov 	r1, 	pc
+	/* Compare. */
+	cmp 	r1, 	r0
+	/* Skip over EMIF-fast initialization if running from SDRAM. */
+	bge 	skip_sdram
+
+	/*
+	* Delay for SDRAM initialization.
+	*/
+	mov	r3,	#0x1800		/* value should be checked */
+3:
+	subs	r3,	r3,	#0x1	/* Decrement count */
+	bne 	3b
+
+
+	/*
+	 * Set SDRAM control values. Disable refresh before MRS command.
+	 */
+
+	/* mobile ddr operation */
+	ldr	r0,	REG_SDRAM_OPERATION
+	mov	r2,	#07
+	str	r2,	[r0]
+
+	/* config register */
+	ldr	r0,	REG_SDRAM_CONFIG
+	ldr	r1,	SDRAM_CONFIG_VAL
+	str	r1,	[r0]
+
+	/* manual command register */
+	ldr	r0,	REG_SDRAM_MANUAL_CMD
+	/* issue set cke high */
+	mov	r1,	#CMD_SDRAM_CKE_SET_HIGH
+	str	r1,	[r0]
+	/* issue nop */
+	mov	r1,	#CMD_SDRAM_NOP
+	str	r1,	[r0]
+
+	mov	r2,	#0x0100
+waitMDDR1:
+	subs	r2,	r2,	 #1
+	bne	waitMDDR1	/* delay loop */
+
+	/* issue precharge */
+	mov	r1,	#CMD_SDRAM_PRECHARGE
+	str	r1,	[r0]
+
+	/* issue autorefresh x 2 */
+	mov	r1,	#CMD_SDRAM_AUTOREFRESH
+	str	r1,	[r0]
+	str	r1,	[r0]
+
+	/* mrs register ddr mobile */
+	ldr	r0,	REG_SDRAM_MRS
+	mov	r1,	#0x33
+	str	r1,	[r0]
+
+	/* emrs1 low-power register */
+	ldr	r0,	REG_SDRAM_EMRS1
+	/* self refresh on all banks */
+	mov	r1,	#0
+	str	r1,	[r0]
+
+	ldr	r0,	REG_DLL_URD_CONTROL
+	ldr	r1,	DLL_URD_CONTROL_VAL
+	str	r1,	[r0]
+
+	ldr	r0,	REG_DLL_LRD_CONTROL
+	ldr	r1,	DLL_LRD_CONTROL_VAL
+	str	r1,	[r0]
+
+	ldr	r0,	REG_DLL_WRT_CONTROL
+	ldr	r1,	DLL_WRT_CONTROL_VAL
+	str	r1,	[r0]
+
+	/* delay loop */
+	mov	r2,	#0x0100
+waitMDDR2:
+	subs	r2,	r2,	#1
+	bne	waitMDDR2
+
+	/*
+	 * Delay for SDRAM initialization.
+	 */
+	mov	r3,	#0x1800
+4:
+	subs	r3,	r3,	#1	/* Decrement count. */
+	bne	4b
+	b	common_tc
+
+skip_sdram:
+
+	ldr	r0,	REG_SDRAM_CONFIG
+	ldr	r1,	SDRAM_CONFIG_VAL
+	str	r1,	[r0]
+
+common_tc:
+	/* slow interface */
+	ldr	r1,	VAL_TC_EMIFS_CS0_CONFIG
+	ldr	r0,	REG_TC_EMIFS_CS0_CONFIG
+	str	r1,	[r0] /* Chip Select 0 */
+
+	ldr	r1,	VAL_TC_EMIFS_CS1_CONFIG
+	ldr	r0,	REG_TC_EMIFS_CS1_CONFIG
+	str	r1,	[r0] /* Chip Select 1 */
+	ldr	r1,	VAL_TC_EMIFS_CS3_CONFIG
+	ldr	r0,	REG_TC_EMIFS_CS3_CONFIG
+	str	r1,	[r0] /* Chip Select 3 */
+
+#ifdef CONFIG_H2_OMAP1610
+	/* inserting additional 2 clock cycle hold time for LAN */
+	ldr     r0,     REG_TC_EMIFS_CS1_ADVANCED
+	ldr    	r1,     VAL_TC_EMIFS_CS1_ADVANCED
+	str     r1,     [r0]
+#endif
+	/* Start MPU Timer 1 */
+	ldr	r0,	REG_MPU_LOAD_TIMER
+	ldr	r1,	VAL_MPU_LOAD_TIMER
+	str	r1,	[r0]
+
+	ldr	r0,	REG_MPU_CNTL_TIMER
+	ldr	r1,	VAL_MPU_CNTL_TIMER
+	str	r1,	[r0]
+
+	/* back to arch calling code */
+	mov	pc,	lr
+
+	/* the literal pools origin */
+	.ltorg
+
+#ifdef CONFIG_CS_AUTOBOOT
+CONF_STATUS:
+	.word 0xfffe1130	/* 32 bits */
+#endif
+
+REG_TC_EMIFS_CONFIG:		/* 32 bits */
+	.word 0xfffecc0c
+REG_TC_EMIFS_CS0_CONFIG:	/* 32 bits */
+	.word 0xfffecc10
+REG_TC_EMIFS_CS1_CONFIG:	/* 32 bits */
+	.word 0xfffecc14
+REG_TC_EMIFS_CS2_CONFIG:	/* 32 bits */
+	.word 0xfffecc18
+REG_TC_EMIFS_CS3_CONFIG:	/* 32 bits */
+	.word 0xfffecc1c
+
+#ifdef CONFIG_H2_OMAP1610
+REG_TC_EMIFS_CS1_ADVANCED:	/* 32 bits */
+	.word 0xfffecc54
+#endif
+
+/* MPU clock/reset/power mode control registers */
+REG_ARM_CKCTL:			/* 16 bits */
+	.word 0xfffece00
+
+REG_ARM_IDLECT3:		/* 16 bits */
+	.word 0xfffece24
+REG_ARM_IDLECT2:		/* 16 bits */
+	.word 0xfffece08
+REG_ARM_IDLECT1:		/* 16 bits */
+	.word 0xfffece04
+
+REG_ARM_RSTCT2:			/* 16 bits */
+	.word 0xfffece14
+REG_ARM_SYSST:			/* 16 bits */
+	.word 0xfffece18
+/* DPLL control registers */
+REG_DPLL1_CTL:			/* 16 bits */
+	.word 0xfffecf00
+
+/* Watch Dog register */
+/* secure watchdog stop */
+REG_WSPRDOG:
+	.word 0xfffeb048
+/* watchdog write pending */
+REG_WWPSDOG:
+	.word 0xfffeb034
+
+WSPRDOG_VAL1:
+	.word 0x0000aaaa
+WSPRDOG_VAL2:
+	.word 0x00005555
+
+/* SDRAM config is: auto refresh enabled, 16 bit 4 bank,
+ counter @8192 rows, 10 ns, 8 burst */
+REG_SDRAM_CONFIG:
+	.word 0xfffecc20
+
+/* Operation register */
+REG_SDRAM_OPERATION:
+	.word 0xfffecc80
+
+/* Manual command register */
+REG_SDRAM_MANUAL_CMD:
+	.word 0xfffecc84
+
+/* SDRAM MRS (New) config is: CAS latency is 2, burst length 8 */
+REG_SDRAM_MRS:
+	.word 0xfffecc70
+
+/* SDRAM MRS (New) config is: CAS latency is 2, burst length 8 */
+REG_SDRAM_EMRS1:
+	.word 0xfffecc78
+
+/* WRT DLL register */
+REG_DLL_WRT_CONTROL:
+	.word 0xfffecc68
+DLL_WRT_CONTROL_VAL:
+	.word 0x03f00002
+
+/* URD DLL register */
+REG_DLL_URD_CONTROL:
+	.word 0xfffeccc0
+DLL_URD_CONTROL_VAL:
+	.word 0x00800002
+
+/* LRD DLL register */
+REG_DLL_LRD_CONTROL:
+	.word 0xfffecccc
+
+REG_WATCHDOG:
+	.word 0xfffec808
+
+REG_MPU_LOAD_TIMER:
+	.word 0xfffec600
+REG_MPU_CNTL_TIMER:
+	.word 0xfffec500
+
+/* 96 MHz Samsung Mobile DDR */
+SDRAM_CONFIG_VAL:
+	.word 0x001200f4
+
+DLL_LRD_CONTROL_VAL:
+	.word 0x00800002
+
+VAL_ARM_CKCTL:
+	.word 0x3000
+VAL_DPLL1_CTL:
+	.word 0x2830
+
+#ifdef CONFIG_INNOVATOROMAP1610
+VAL_TC_EMIFS_CS0_CONFIG:
+	.word 0x002130b0
+VAL_TC_EMIFS_CS1_CONFIG:
+	.word 0x00001131
+VAL_TC_EMIFS_CS2_CONFIG:
+	.word 0x000055f0
+VAL_TC_EMIFS_CS3_CONFIG:
+	.word 0x88011131
+#endif
+
+#ifdef CONFIG_H2_OMAP1610
+VAL_TC_EMIFS_CS0_CONFIG:
+	.word 0x00203331
+VAL_TC_EMIFS_CS1_CONFIG:
+	.word 0x8180fff3
+VAL_TC_EMIFS_CS2_CONFIG:
+	.word 0xf800f22a
+VAL_TC_EMIFS_CS3_CONFIG:
+	.word 0x88011131
+VAL_TC_EMIFS_CS1_ADVANCED:
+	.word 0x00000022
+#endif
+
+VAL_TC_EMIFF_SDRAM_CONFIG:
+	.word 0x010290fc
+VAL_TC_EMIFF_MRS:
+	.word 0x00000027
+
+VAL_ARM_IDLECT1:
+	.word 0x00000400
+
+VAL_ARM_IDLECT2:
+	.word 0x00000886
+VAL_ARM_IDLECT3:
+	.word 0x00000015
+
+WATCHDOG_VAL1:
+	.word 0x000000f5
+WATCHDOG_VAL2:
+	.word 0x000000a0
+
+VAL_MPU_LOAD_TIMER:
+	.word 0xffffffff
+VAL_MPU_CNTL_TIMER:
+	.word 0xffffffa1
+
+/* command values */
+.equ CMD_SDRAM_NOP,		0x00000000
+.equ CMD_SDRAM_PRECHARGE,	0x00000001
+.equ CMD_SDRAM_AUTOREFRESH,	0x00000002
+.equ CMD_SDRAM_CKE_SET_HIGH,	0x00000007