/* * Low-level board setup code for TI DaVinci SoC based boards. * * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net> * * Partially based on TI sources, original copyrights follow: *//* * 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 * * Modified for OMAP 5912 OSK board by Rishi Bhattacharya, Apr 2004 * See file CREDITS for list of people who contributed to this * project. * * Modified for DV-EVM board by Rishi Bhattacharya, Apr 2005 * See file CREDITS for list of people who contributed to this * project. * * Modified for DV-EVM board by Swaminathan S, Nov 2005 * 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>.globl	lowlevel_initlowlevel_init:	/*-------------------------------------------------------*	 * Mask all IRQs by setting all bits in the EINT default *	 *-------------------------------------------------------*/	mov	r1, $0	ldr	r0, =EINT_ENABLE0	str	r1, [r0]	ldr	r0, =EINT_ENABLE1	str	r1, [r0]	/*------------------------------------------------------*	 * Put the GEM in reset					*	 *------------------------------------------------------*/	/* Put the GEM in reset */	ldr	r8, PSC_GEM_FLAG_CLEAR	ldr	r6, MDCTL_GEM	ldr	r7, [r6]	and	r7, r7, r8	str	r7, [r6]	/* Enable the Power Domain Transition Command */	ldr	r6, PTCMD	ldr	r7, [r6]	orr	r7, r7, $0x02	str	r7, [r6]	/* Check for Transition Complete(PTSTAT) */checkStatClkStopGem:	ldr	r6, PTSTAT	ldr	r7, [r6]	ands	r7, r7, $0x02	bne	checkStatClkStopGem	/* Check for GEM Reset Completion */checkGemStatClkStop:	ldr	r6, MDSTAT_GEM	ldr	r7, [r6]	ands	r7, r7, $0x100	bne	checkGemStatClkStop	/* Do this for enabling a WDT initiated reset this is a workaround	   for a chip bug.  Not required under normal situations */	ldr	r6, P1394	mov	r10, $0	str	r10, [r6]	/*------------------------------------------------------*	 * Enable L1 & L2 Memories in Fast mode                 *	 *------------------------------------------------------*/	ldr	r6, DFT_ENABLE	mov	r10, $0x01	str	r10, [r6]	ldr	r6, MMARG_BRF0	ldr	r10, MMARG_BRF0_VAL	str	r10, [r6]	ldr	r6, DFT_ENABLE	mov	r10, $0	str	r10, [r6]	/*------------------------------------------------------*	 * DDR2 PLL Initialization				*	 *------------------------------------------------------*/	/* Select the Clock Mode Depending on the Value written in the Boot Table by the run script */	mov	r10, $0	ldr	r6, PLL2_CTL	ldr	r7, PLL_CLKSRC_MASK	ldr	r8, [r6]	and	r8, r8, r7	mov	r9, r10, lsl $8	orr	r8, r8, r9	str	r8, [r6]	/* Select the PLLEN source */	ldr	r7, PLL_ENSRC_MASK	and	r8, r8, r7	str	r8, [r6]	/* Bypass the PLL */	ldr	r7, PLL_BYPASS_MASK	and	r8, r8, r7	str	r8, [r6]	/* Wait for few cycles to allow PLLEN Mux switch properly to bypass Clock */	mov	r10, $0x20WaitPPL2Loop:	subs	r10, r10, $1	bne	WaitPPL2Loop	/* Reset the PLL */	ldr	r7, PLL_RESET_MASK	and	r8, r8, r7	str	r8, [r6]	/* Power up the PLL */	ldr	r7, PLL_PWRUP_MASK	and	r8, r8, r7	str	r8, [r6]	/* Enable the PLL from Disable Mode */	ldr	r7, PLL_DISABLE_ENABLE_MASK	and	r8, r8, r7	str	r8, [r6]	/* Program the PLL Multiplier */	ldr	r6, PLL2_PLLM	mov	r2, $0x17	/* 162 MHz */	str	r2, [r6]	/* Program the PLL2 Divisor Value */	ldr	r6, PLL2_DIV2	mov	r3, $0x01	str	r3, [r6]	/* Program the PLL2 Divisor Value */	ldr	r6, PLL2_DIV1	mov	r4, $0x0b	/* 54 MHz */	str	r4, [r6]	/* PLL2 DIV2 MMR */	ldr	r8, PLL2_DIV_MASK	ldr	r6, PLL2_DIV2	ldr	r9, [r6]	and	r8, r8, r9	mov	r9, $0x01	mov	r9, r9, lsl $15	orr	r8, r8, r9	str	r8, [r6]	/* Program the GOSET bit to take new divider values */	ldr	r6, PLL2_PLLCMD	ldr	r7, [r6]	orr	r7, r7, $0x01	str	r7, [r6]	/* Wait for Done */	ldr	r6, PLL2_PLLSTATdoneLoop_0:	ldr	r7, [r6]	ands	r7, r7, $0x01	bne	doneLoop_0	/* PLL2 DIV1 MMR */	ldr	r8, PLL2_DIV_MASK	ldr	r6, PLL2_DIV1	ldr	r9, [r6]	and	r8, r8, r9	mov	r9, $0x01	mov	r9, r9, lsl $15	orr	r8, r8, r9	str	r8, [r6]	/* Program the GOSET bit to take new divider values */	ldr	r6, PLL2_PLLCMD	ldr	r7, [r6]	orr	r7, r7, $0x01	str	r7, [r6]	/* Wait for Done */	ldr	r6, PLL2_PLLSTATdoneLoop:	ldr	r7, [r6]	ands	r7, r7, $0x01	bne	doneLoop	/* Wait for PLL to Reset Properly */	mov	r10, $0x218ResetPPL2Loop:	subs	r10, r10, $1	bne	ResetPPL2Loop	/* Bring PLL out of Reset */	ldr	r6, PLL2_CTL	ldr	r8, [r6]	orr	r8, r8, $0x08	str	r8, [r6]	/* Wait for PLL to Lock */	ldr	r10, PLL_LOCK_COUNTPLL2Lock:	subs	r10, r10, $1	bne	PLL2Lock	/* Enable the PLL */	ldr	r6, PLL2_CTL	ldr	r8, [r6]	orr	r8, r8, $0x01	str	r8, [r6]	/*------------------------------------------------------*	 * Issue Soft Reset to DDR Module			*	 *------------------------------------------------------*/	/* Shut down the DDR2 LPSC Module */	ldr	r8, PSC_FLAG_CLEAR	ldr	r6, MDCTL_DDR2	ldr	r7, [r6]	and	r7, r7, r8	orr	r7, r7, $0x03	str	r7, [r6]	/* Enable the Power Domain Transition Command */	ldr	r6, PTCMD	ldr	r7, [r6]	orr	r7, r7, $0x01	str	r7, [r6]	/* Check for Transition Complete(PTSTAT) */checkStatClkStop:	ldr	r6, PTSTAT	ldr	r7, [r6]	ands	r7, r7, $0x01	bne	checkStatClkStop	/* Check for DDR2 Controller Enable Completion */checkDDRStatClkStop:	ldr	r6, MDSTAT_DDR2	ldr	r7, [r6]	and	r7, r7, $0x1f	cmp	r7, $0x03	bne	checkDDRStatClkStop	/*------------------------------------------------------*	 * Program DDR2 MMRs for 162MHz Setting			*	 *------------------------------------------------------*/	/* Program PHY Control Register */	ldr	r6, DDRCTL	ldr	r7, DDRCTL_VAL	str	r7, [r6]	/* Program SDRAM Bank Config Register */	ldr	r6, SDCFG	ldr	r7, SDCFG_VAL	str	r7, [r6]	/* Program SDRAM TIM-0 Config Register */	ldr	r6, SDTIM0	ldr	r7, SDTIM0_VAL_162MHz	str	r7, [r6]	/* Program SDRAM TIM-1 Config Register */	ldr	r6, SDTIM1	ldr	r7, SDTIM1_VAL_162MHz	str	r7, [r6]	/* Program the SDRAM Bank Config Control Register */	ldr	r10, MASK_VAL	ldr	r8, SDCFG	ldr	r9, SDCFG_VAL	and	r9, r9, r10	str	r9, [r8]	/* Program SDRAM SDREF Config Register */	ldr	r6, SDREF	ldr	r7, SDREF_VAL	str	r7, [r6]	/*------------------------------------------------------*	 * Issue Soft Reset to DDR Module			*	 *------------------------------------------------------*/	/* Issue a Dummy DDR2 read/write */	ldr	r8, DDR2_START_ADDR	ldr	r7, DUMMY_VAL	str	r7, [r8]	ldr	r7, [r8]	/* Shut down the DDR2 LPSC Module */	ldr	r8, PSC_FLAG_CLEAR	ldr	r6, MDCTL_DDR2	ldr	r7, [r6]	and	r7, r7, r8	orr	r7, r7, $0x01	str	r7, [r6]	/* Enable the Power Domain Transition Command */	ldr	r6, PTCMD	ldr	r7, [r6]	orr	r7, r7, $0x01	str	r7, [r6]	/* Check for Transition Complete(PTSTAT) */checkStatClkStop2:	ldr	r6, PTSTAT	ldr	r7, [r6]	ands	r7, r7, $0x01	bne	checkStatClkStop2	/* Check for DDR2 Controller Enable Completion */checkDDRStatClkStop2:	ldr	r6, MDSTAT_DDR2	ldr	r7, [r6]	and	r7, r7, $0x1f	cmp	r7, $0x01	bne	checkDDRStatClkStop2	/*------------------------------------------------------*	 * Turn DDR2 Controller Clocks On			*	 *------------------------------------------------------*/	/* Enable the DDR2 LPSC Module */	ldr	r6, MDCTL_DDR2	ldr	r7, [r6]	orr	r7, r7, $0x03	str	r7, [r6]	/* Enable the Power Domain Transition Command */	ldr	r6, PTCMD	ldr	r7, [r6]	orr	r7, r7, $0x01	str	r7, [r6]	/* Check for Transition Complete(PTSTAT) */checkStatClkEn2:	ldr	r6, PTSTAT	ldr	r7, [r6]	ands	r7, r7, $0x01	bne	checkStatClkEn2	/* Check for DDR2 Controller Enable Completion */checkDDRStatClkEn2:	ldr	r6, MDSTAT_DDR2	ldr	r7, [r6]	and	r7, r7, $0x1f	cmp	r7, $0x03	bne	checkDDRStatClkEn2	/*  DDR Writes and Reads */	ldr	r6, CFGTEST	mov	r3, $0x01	str	r3, [r6]	/*------------------------------------------------------*	 * System PLL Initialization				*	 *------------------------------------------------------*/	/* Select the Clock Mode Depending on the Value written in the Boot Table by the run script */	mov	r2, $0	ldr	r6, PLL1_CTL	ldr	r7, PLL_CLKSRC_MASK	ldr	r8, [r6]	and	r8, r8, r7	mov	r9, r2, lsl $8	orr	r8, r8, r9	str	r8, [r6]	/* Select the PLLEN source */	ldr	r7, PLL_ENSRC_MASK	and	r8, r8, r7	str	r8, [r6]	/* Bypass the PLL */	ldr	r7, PLL_BYPASS_MASK	and	r8, r8, r7	str	r8, [r6]	/* Wait for few cycles to allow PLLEN Mux switch properly to bypass Clock */	mov	r10, $0x20WaitLoop:	subs	r10, r10, $1	bne	WaitLoop	/* Reset the PLL */	ldr	r7, PLL_RESET_MASK	and	r8, r8, r7	str	r8, [r6]	/* Disable the PLL */	orr	r8, r8, $0x10	str	r8, [r6]	/* Power up the PLL */	ldr	r7, PLL_PWRUP_MASK	and	r8, r8, r7	str	r8, [r6]	/* Enable the PLL from Disable Mode */	ldr	r7, PLL_DISABLE_ENABLE_MASK	and	r8, r8, r7	str	r8, [r6]	/* Program the PLL Multiplier */	ldr	r6, PLL1_PLLM	mov	r3, $0x15	/* For 594MHz */	str	r3, [r6]	/* Wait for PLL to Reset Properly */	mov	r10, $0xffResetLoop:	subs	r10, r10, $1	bne	ResetLoop	/* Bring PLL out of Reset */	ldr	r6, PLL1_CTL	orr	r8, r8, $0x08	str	r8, [r6]	/* Wait for PLL to Lock */	ldr	r10, PLL_LOCK_COUNTPLL1Lock:	subs	r10, r10, $1	bne	PLL1Lock	/* Enable the PLL */	orr	r8, r8, $0x01	str	r8, [r6]	nop	nop	nop	nop	/*------------------------------------------------------*	 * AEMIF configuration for NOR Flash (double check)     *	 *------------------------------------------------------*/	ldr	r0, _PINMUX0	ldr	r1, _DEV_SETTING	str	r1, [r0]	ldr	r0, WAITCFG	ldr	r1, WAITCFG_VAL	ldr	r2, [r0]	orr	r2, r2, r1	str	r2, [r0]	ldr	r0, ACFG3	ldr	r1, ACFG3_VAL	ldr	r2, [r0]	and	r1, r2, r1	str	r1, [r0]	ldr	r0, ACFG4	ldr	r1, ACFG4_VAL	ldr	r2, [r0]	and	r1, r2, r1	str	r1, [r0]	ldr	r0, ACFG5	ldr	r1, ACFG5_VAL	ldr	r2, [r0]	and	r1, r2, r1	str	r1, [r0]	/*--------------------------------------*	 * VTP manual Calibration               *	 *--------------------------------------*/	ldr	r0, VTPIOCR	ldr	r1, VTP_MMR0	str	r1, [r0]	ldr	r0, VTPIOCR	ldr	r1, VTP_MMR1	str	r1, [r0]	/* Wait for 33 VTP CLK cycles.  VRP operates at 27 MHz */	ldr	r10, VTP_LOCK_COUNTVTPLock:	subs	r10, r10, $1	bne	VTPLock	ldr	r6, DFT_ENABLE	mov	r10, $0x01	str	r10, [r6]	ldr	r6, DDRVTPR	ldr	r7, [r6]	and	r7, r7, $0x1f	and	r8, r7, $0x3e0	orr	r8, r7, r8	ldr	r7, VTP_RECAL	orr	r8, r7, r8	ldr	r7, VTP_EN	orr	r8, r7, r8	str	r8, [r0]	/* Wait for 33 VTP CLK cycles.  VRP operates at 27 MHz */	ldr	r10, VTP_LOCK_COUNTVTP1Lock:	subs	r10, r10, $1	bne	VTP1Lock	ldr	r1, [r0]	ldr	r2, VTP_MASK	and	r2, r1, r2	str	r2, [r0]	ldr	r6, DFT_ENABLE	mov	r10, $0	str	r10, [r6]	/*	 * Call board-specific lowlevel init.	 * That MUST be present and THAT returns	 * back to arch calling code with "mov pc, lr."	 */	b	dv_board_init.ltorg_PINMUX0:	.word	0x01c40000		/* Device Configuration Registers */_PINMUX1:	.word	0x01c40004		/* Device Configuration Registers */_DEV_SETTING:	.word	0x00000c1fWAITCFG:	.word	0x01e00004WAITCFG_VAL:	.word	0ACFG3:	.word	0x01e00014ACFG3_VAL:	.word	0x3ffffffdACFG4:	.word	0x01e00018ACFG4_VAL:	.word	0x3ffffffdACFG5:	.word	0x01e0001cACFG5_VAL:	.word	0x3ffffffdMDCTL_DDR2:	.word	0x01c41a34MDSTAT_DDR2:	.word	0x01c41834PTCMD:	.word	0x01c41120PTSTAT:	.word	0x01c41128EINT_ENABLE0:	.word	0x01c48018EINT_ENABLE1:	.word	0x01c4801cPSC_FLAG_CLEAR:	.word	0xffffffe0PSC_GEM_FLAG_CLEAR:	.word	0xfffffeff/* DDR2 MMR & CONFIGURATION VALUES, 162 MHZ clock */DDRCTL:	.word	0x200000e4DDRCTL_VAL:	.word	0x50006405SDREF:	.word	0x2000000cSDREF_VAL:	.word	0x000005c3SDCFG:	.word	0x20000008SDCFG_VAL:#ifdef	DDR_4BANKS	.word	0x00178622#elif defined DDR_8BANKS	.word	0x00178632#else#error "Unknown DDR configuration!!!"#endifSDTIM0:	.word	0x20000010SDTIM0_VAL_162MHz:	.word	0x28923211SDTIM1:	.word	0x20000014SDTIM1_VAL_162MHz:	.word	0x0016c722VTPIOCR:	.word	0x200000f0	/* VTP IO Control register */DDRVTPR:	.word	0x01c42030	/* DDR VPTR MMR */VTP_MMR0:	.word	0x201fVTP_MMR1:	.word	0xa01fDFT_ENABLE:	.word	0x01c4004cVTP_LOCK_COUNT:	.word	0x5b0VTP_MASK:	.word	0xffffdfffVTP_RECAL:	.word	0x40000VTP_EN:	.word	0x02000CFGTEST:	.word	0x80010000MASK_VAL:	.word	0x00000fff/* GEM Power Up & LPSC Control Register */MDCTL_GEM:	.word	0x01c41a9cMDSTAT_GEM:	.word	0x01c4189c/* For WDT reset chip bug */P1394:	.word	0x01c41a20PLL_CLKSRC_MASK:	.word	0xfffffeff	/* Mask the Clock Mode bit */PLL_ENSRC_MASK:	.word	0xffffffdf	/* Select the PLLEN source */PLL_BYPASS_MASK:	.word	0xfffffffe	/* Put the PLL in BYPASS */PLL_RESET_MASK:	.word	0xfffffff7	/* Put the PLL in Reset Mode */PLL_PWRUP_MASK:	.word	0xfffffffd	/* PLL Power up Mask Bit  */PLL_DISABLE_ENABLE_MASK:	.word	0xffffffef	/* Enable the PLL from Disable */PLL_LOCK_COUNT:	.word	0x2000/* PLL1-SYSTEM PLL MMRs */PLL1_CTL:	.word	0x01c40900PLL1_PLLM:	.word	0x01c40910/* PLL2-SYSTEM PLL MMRs */PLL2_CTL:	.word	0x01c40d00PLL2_PLLM:	.word	0x01c40d10PLL2_DIV1:	.word	0x01c40d18PLL2_DIV2:	.word	0x01c40d1cPLL2_PLLCMD:	.word	0x01c40d38PLL2_PLLSTAT:	.word	0x01c40d3cPLL2_DIV_MASK:	.word	0xffff7fffMMARG_BRF0:	.word	0x01c42010	/* BRF margin mode 0 (R/W)*/MMARG_BRF0_VAL:	.word	0x00444400DDR2_START_ADDR:	.word	0x80000000DUMMY_VAL:	.word	0xa55aa55a