Merge remote-tracking branch 'u-boot/master' into 'u-boot-arm/master'

1 files changed, 246 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/arm926ejs/lowlevel_init.S b/arch/arm/mach-at91/arm926ejs/lowlevel_init.S
new file mode 100644
index 0000000000..a9ec81a75c
--- /dev/null
+++ b/arch/arm/mach-at91/arm926ejs/lowlevel_init.S
@@ -0,0 +1,246 @@
+/*
+ * 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>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_wdt.h>
+#include <asm/arch/at91_pio.h>
+#include <asm/arch/at91_matrix.h>
+#include <asm/arch/at91sam9_sdramc.h>
+#include <asm/arch/at91sam9_smc.h>
+#include <asm/arch/at91_rstc.h>
+#ifdef CONFIG_ATMEL_LEGACY
+#include <asm/arch/at91sam9_matrix.h>
+#endif
+#ifndef CONFIG_SYS_MATRIX_EBICSA_VAL
+#define CONFIG_SYS_MATRIX_EBICSA_VAL CONFIG_SYS_MATRIX_EBI0CSA_VAL
+#endif
+
+.globl lowlevel_init
+.type lowlevel_init,function
+lowlevel_init:
+
+POS1:
+	adr	r5, POS1	/* r5 = POS1 run time */
+	ldr	r0, =POS1	/* r0 = POS1 compile */
+	sub	r5, r5, r0	/* r0 = CONFIG_SYS_TEXT_BASE-1 */
+
+	/* memory control configuration 1 */
+	ldr	r0, =SMRDATA
+	ldr	r2, =SMRDATA1
+	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_ASM_PMC_MCKR)
+	ldr	r0, [r1]
+	and	r0, r0, #3
+	cmp	r0, #0
+	bne	PLL_setup_end
+
+/* ---------------------------------------------------------------------------
+ * - Enable the Main Oscillator
+ * ---------------------------------------------------------------------------
+ */
+	ldr	r1, =(AT91_ASM_PMC_MOR)
+	ldr	r2, =(AT91_ASM_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_IXR_MOSCS
+MOSCS_Loop:
+	ldr	r3, [r2]
+	and	r3, r4, r3
+	cmp	r3, #AT91_PMC_IXR_MOSCS
+	bne	MOSCS_Loop
+
+/* ----------------------------------------------------------------------------
+ * PMC Init Step 2.
+ * ----------------------------------------------------------------------------
+ * Setup PLLA
+ * ----------------------------------------------------------------------------
+ */
+	ldr	r1, =(AT91_ASM_PMC_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_IXR_LOCKA
+MOSCS_Loop1:
+	ldr	r3, [r2]
+	and	r3, r4, r3
+	cmp	r3, #AT91_PMC_IXR_LOCKA
+	bne	MOSCS_Loop1
+
+/* ----------------------------------------------------------------------------
+ * PMC Init Step 3.
+ * ----------------------------------------------------------------------------
+ * - Switch on the Main Oscillator
+ * ----------------------------------------------------------------------------
+ */
+	ldr	r1, =(AT91_ASM_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_IXR_MCKRDY
+MCKRDY_Loop:
+	ldr	r3, [r2]
+	and	r3, r4, r3
+	cmp	r3, #AT91_PMC_IXR_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_IXR_MCKRDY
+MCKRDY_Loop1:
+	ldr	r3, [r2]
+	and	r3, r4, r3
+	cmp	r3, #AT91_PMC_IXR_MCKRDY
+	bne	MCKRDY_Loop1
+PLL_setup_end:
+
+/* ----------------------------------------------------------------------------
+ * - memory control configuration 2
+ * ----------------------------------------------------------------------------
+ */
+	ldr	r0, =(AT91_ASM_SDRAMC_TR)
+	ldr	r1, [r0]
+	cmp	r1, #0
+	bne	SDRAM_setup_end
+
+	ldr	r0, =SMRDATA1
+	ldr	r2, =SMRDATA2
+	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_ASM_WDT_MR
+	.word CONFIG_SYS_WDTC_WDMR_VAL
+	/* configure PIOx as EBI0 D[16-31] */
+#if defined(CONFIG_AT91SAM9263)
+	.word AT91_ASM_PIOD_PDR
+	.word CONFIG_SYS_PIOD_PDR_VAL1
+	.word AT91_ASM_PIOD_PUDR
+	.word CONFIG_SYS_PIOD_PPUDR_VAL
+	.word AT91_ASM_PIOD_ASR
+	.word CONFIG_SYS_PIOD_PPUDR_VAL
+#elif defined(CONFIG_AT91SAM9260) || defined(CONFIG_AT91SAM9261) \
+	|| defined(CONFIG_AT91SAM9G20)
+	.word AT91_ASM_PIOC_PDR
+	.word CONFIG_SYS_PIOC_PDR_VAL1
+	.word AT91_ASM_PIOC_PUDR
+	.word CONFIG_SYS_PIOC_PPUDR_VAL
+#endif
+	.word AT91_ASM_MATRIX_CSA0
+	.word CONFIG_SYS_MATRIX_EBICSA_VAL
+
+	/* flash */
+	.word AT91_ASM_SMC_MODE0
+	.word CONFIG_SYS_SMC0_MODE0_VAL
+
+	.word AT91_ASM_SMC_CYCLE0
+	.word CONFIG_SYS_SMC0_CYCLE0_VAL
+
+	.word AT91_ASM_SMC_PULSE0
+	.word CONFIG_SYS_SMC0_PULSE0_VAL
+
+	.word AT91_ASM_SMC_SETUP0
+	.word CONFIG_SYS_SMC0_SETUP0_VAL
+
+SMRDATA1:
+	.word AT91_ASM_SDRAMC_MR
+	.word CONFIG_SYS_SDRC_MR_VAL1
+	.word AT91_ASM_SDRAMC_TR
+	.word CONFIG_SYS_SDRC_TR_VAL1
+	.word AT91_ASM_SDRAMC_CR
+	.word CONFIG_SYS_SDRC_CR_VAL
+	.word AT91_ASM_SDRAMC_MDR
+	.word CONFIG_SYS_SDRC_MDR_VAL
+	.word AT91_ASM_SDRAMC_MR
+	.word CONFIG_SYS_SDRC_MR_VAL2
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL1
+	.word AT91_ASM_SDRAMC_MR
+	.word CONFIG_SYS_SDRC_MR_VAL3
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL2
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL3
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL4
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL5
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL6
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL7
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL8
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL9
+	.word AT91_ASM_SDRAMC_MR
+	.word CONFIG_SYS_SDRC_MR_VAL4
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL10
+	.word AT91_ASM_SDRAMC_MR
+	.word CONFIG_SYS_SDRC_MR_VAL5
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL11
+	.word AT91_ASM_SDRAMC_TR
+	.word CONFIG_SYS_SDRC_TR_VAL2
+	.word CONFIG_SYS_SDRAM_BASE
+	.word CONFIG_SYS_SDRAM_VAL12
+	/* User reset enable*/
+	.word AT91_ASM_RSTC_MR
+	.word CONFIG_SYS_RSTC_RMR_VAL
+#ifdef CONFIG_SYS_MATRIX_MCFG_REMAP
+	/* MATRIX_MCFG - REMAP all masters */
+	.word AT91_ASM_MATRIX_MCFG
+	.word 0x1FF
+#endif
+SMRDATA2:
+	.word 0