at91: unify nor boot support

the lowlevel init sequence is the same so unify it

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 278 insertions, 0 deletions

diff --git a/cpu/arm926ejs/at91/lowlevel_init.S b/cpu/arm926ejs/at91/lowlevel_init.S
new file mode 100644
index 0000000..5ed518c
--- /dev/null
+++ b/cpu/arm926ejs/at91/lowlevel_init.S
@@ -0,0 +1,278 @@
+/*
+ * Memory Setup stuff - taken from blob memsetup.S
+ *
+ * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) and
+ *		       Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl)
+ *
+ * Copyright (C) 2008 Ronetix Ilko Iliev (www.ronetix.at)
+ * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * 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>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_pio.h>
+#include <asm/arch/at91_rstc.h>
+#include <asm/arch/at91_wdt.h>
+#include <asm/arch/at91sam9_matrix.h>
+#include <asm/arch/at91sam9_sdramc.h>
+#include <asm/arch/at91sam9_smc.h>
+
+_TEXT_BASE:
+	.word	TEXT_BASE
+
+.globl lowlevel_init
+.type lowlevel_init,function
+lowlevel_init:
+
+	mov	r5, pc		/* r5 = POS1 + 4 current */
+POS1:
+	ldr	r0, =POS1	/* r0 = POS1 compile */
+	ldr	r2, _TEXT_BASE
+	sub	r0, r0, r2	/* r0 = POS1-_TEXT_BASE (POS1 relative) */
+	sub	r5, r5, r0	/* r0 = TEXT_BASE-1 */
+	sub	r5, r5, #4	/* r1 = text base - current */
+
+	/* memory control configuration 1 */
+	ldr	r0, =SMRDATA
+	ldr	r2, =SMRDATA1
+	ldr	r1, _TEXT_BASE
+	sub	r0, r0, r1
+	sub	r2, r2, r1
+	add	r0, r0, r5
+	add	r2, r2, r5
+0:
+	/* the address */
+	ldr	r1, [r0], #4
+	/* the value */
+	ldr	r3, [r0], #4
+	str	r3, [r1]
+	cmp	r2, r0
+	bne	0b
+
+/* ----------------------------------------------------------------------------
+ * PMC Init Step 1.
+ * ----------------------------------------------------------------------------
+ * - Check if the PLL is already initialized
+ * ----------------------------------------------------------------------------
+ */
+	ldr	r1, =(AT91_BASE_SYS + AT91_PMC_MCKR)
+	ldr	r0, [r1]
+	and	r0, r0, #3
+	cmp	r0, #0
+	bne	PLL_setup_end
+
+/* ---------------------------------------------------------------------------
+ * - Enable the Main Oscillator
+ * ---------------------------------------------------------------------------
+ */
+	ldr	r1, =(AT91_BASE_SYS + AT91_CKGR_MOR)
+	ldr	r2, =(AT91_BASE_SYS + AT91_PMC_SR)
+	/* Main oscillator Enable register PMC_MOR: */
+	ldr	r0, =CONFIG_SYS_MOR_VAL
+	str	r0, [r1]
+
+	/* Reading the PMC Status to detect when the Main Oscillator is enabled */
+	mov	r4, #AT91_PMC_MOSCS
+MOSCS_Loop:
+	ldr	r3, [r2]
+	and	r3, r4, r3
+	cmp	r3, #AT91_PMC_MOSCS
+	bne	MOSCS_Loop
+
+/* ----------------------------------------------------------------------------
+ * PMC Init Step 2.
+ * ----------------------------------------------------------------------------
+ * Setup PLLA
+ * ----------------------------------------------------------------------------
+ */
+	ldr	r1, =(AT91_BASE_SYS + AT91_CKGR_PLLAR)
+	ldr	r0, =CONFIG_SYS_PLLAR_VAL
+	str	r0, [r1]
+
+	/* Reading the PMC Status register to detect when the PLLA is locked */
+	mov	r4, #AT91_PMC_LOCKA
+MOSCS_Loop1:
+	ldr	r3, [r2]
+	and	r3, r4, r3
+	cmp	r3, #AT91_PMC_LOCKA
+	bne	MOSCS_Loop1
+
+/* ----------------------------------------------------------------------------
+ * PMC Init Step 3.
+ * ----------------------------------------------------------------------------
+ * - Switch on the Main Oscillator
+ * ----------------------------------------------------------------------------
+ */
+	ldr	r1, =(AT91_BASE_SYS + AT91_PMC_MCKR)
+
+	/* -Master Clock Controller register PMC_MCKR */
+	ldr	r0, =CONFIG_SYS_MCKR1_VAL
+	str	r0, [r1]
+
+	/* Reading the PMC Status to detect when the Master clock is ready */
+	mov	r4, #AT91_PMC_MCKRDY
+MCKRDY_Loop:
+	ldr	r3, [r2]
+	and	r3, r4, r3
+	cmp	r3, #AT91_PMC_MCKRDY
+	bne	MCKRDY_Loop
+
+	ldr	r0, =CONFIG_SYS_MCKR2_VAL
+	str	r0, [r1]
+
+	/* Reading the PMC Status to detect when the Master clock is ready */
+	mov	r4, #AT91_PMC_MCKRDY
+MCKRDY_Loop1:
+	ldr	r3, [r2]
+	and	r3, r4, r3
+	cmp	r3, #AT91_PMC_MCKRDY
+	bne	MCKRDY_Loop1
+
+PLL_setup_end:
+
+/* ----------------------------------------------------------------------------
+ * - memory control configuration 2
+ * ----------------------------------------------------------------------------
+ */
+	ldr	r0, =(AT91_BASE_SYS + AT91_SDRAMC_TR)
+	ldr	r1, [r0]
+	cmp	r1, #0
+	bne	SDRAM_setup_end
+
+	ldr	r0, =SMRDATA1
+	ldr	r2, =SMRDATA2
+	ldr	r1, _TEXT_BASE
+	sub	r0, r0, r1
+	sub	r2, r2, r1
+	add	r0, r0, r5
+	add	r2, r2, r5
+
+2:
+	/* the address */
+	ldr	r1, [r0], #4
+	/* the value */
+	ldr	r3, [r0], #4
+	str	r3, [r1]
+	cmp	r2, r0
+	bne	2b
+
+SDRAM_setup_end:
+	/* everything is fine now */
+	mov	pc, lr
+
+	.ltorg
+
+SMRDATA:
+	.word (AT91_BASE_SYS + AT91_WDT_MR)
+	.word CONFIG_SYS_WDTC_WDMR_VAL
+
+	/* configure PIOx as EBI0 D[16-31] */
+#if defined(CONFIG_AT91SAM9263)
+	.word (AT91_BASE_SYS + AT91_PIOD + PIO_PDR)
+	.word CONFIG_SYS_PIOD_PDR_VAL1
+	.word (AT91_BASE_SYS + AT91_PIOD + PIO_PUDR)
+	.word CONFIG_SYS_PIOD_PPUDR_VAL
+	.word (AT91_BASE_SYS + AT91_PIOD + PIO_ASR)
+	.word CONFIG_SYS_PIOD_PPUDR_VAL
+#elif defined(CONFIG_AT91SAM9261)
+	.word (AT91_BASE_SYS + AT91_PIOC + PIO_PDR)
+	.word CONFIG_SYS_PIOC_PDR_VAL1
+	.word (AT91_BASE_SYS + AT91_PIOC + PIO_PUDR)
+	.word CONFIG_SYS_PIOC_PPUDR_VAL
+#endif
+
+#if defined(AT91_MATRIX_EBI0CSA)
+	.word (AT91_BASE_SYS + AT91_MATRIX_EBI0CSA)
+	.word CONFIG_SYS_MATRIX_EBI0CSA_VAL
+#else /* AT91_MATRIX_EBICSA */
+	.word (AT91_BASE_SYS + AT91_MATRIX_EBICSA)
+	.word CONFIG_SYS_MATRIX_EBICSA_VAL
+#endif
+
+	/* flash */
+	.word (AT91_BASE_SYS + AT91_SMC_MODE(0))
+	.word CONFIG_SYS_SMC0_MODE0_VAL
+
+	.word (AT91_BASE_SYS + AT91_SMC_CYCLE(0))
+	.word CONFIG_SYS_SMC0_CYCLE0_VAL
+
+	.word (AT91_BASE_SYS + AT91_SMC_PULSE(0))
+	.word CONFIG_SYS_SMC0_PULSE0_VAL
+
+	.word (AT91_BASE_SYS + AT91_SMC_SETUP(0))
+	.word CONFIG_SYS_SMC0_SETUP0_VAL
+
+SMRDATA1:
+	.word (AT91_BASE_SYS + AT91_SDRAMC_MR)
+	.word CONFIG_SYS_SDRC_MR_VAL1
+	.word (AT91_BASE_SYS + AT91_SDRAMC_TR)
+	.word CONFIG_SYS_SDRC_TR_VAL1
+	.word (AT91_BASE_SYS + AT91_SDRAMC_CR)
+	.word CONFIG_SYS_SDRC_CR_VAL
+	.word (AT91_BASE_SYS + AT91_SDRAMC_MDR)
+	.word CONFIG_SYS_SDRC_MDR_VAL
+	.word (AT91_BASE_SYS + AT91_SDRAMC_MR)
+	.word CONFIG_SYS_SDRC_MR_VAL2
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL1
+	.word (AT91_BASE_SYS + AT91_SDRAMC_MR)
+	.word CONFIG_SYS_SDRC_MR_VAL3
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL2
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL3
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL4
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL5
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL6
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL7
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL8
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL9
+	.word (AT91_BASE_SYS + AT91_SDRAMC_MR)
+	.word CONFIG_SYS_SDRC_MR_VAL4
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL10
+	.word (AT91_BASE_SYS + AT91_SDRAMC_MR)
+	.word CONFIG_SYS_SDRC_MR_VAL5
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL11
+	.word (AT91_BASE_SYS + AT91_SDRAMC_TR)
+	.word CONFIG_SYS_SDRC_TR_VAL2
+	.word AT91_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL12
+	/* User reset enable*/
+	.word (AT91_BASE_SYS + AT91_RSTC_MR)
+	.word CONFIG_SYS_RSTC_RMR_VAL
+#ifdef CONFIG_SYS_MATRIX_MCFG_REMAP
+	/* MATRIX_MCFG - REMAP all masters */
+	.word (AT91_BASE_SYS + AT91_MATRIX_MCFG0)
+	.word 0x1FF
+#endif
+
+SMRDATA2:
+	.word 0