| /* |
| * 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_AT91SAM9260) || 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 |
