diff options
Diffstat (limited to 'board/syteco/jadecpu/lowlevel_init.S')
| -rw-r--r-- | board/syteco/jadecpu/lowlevel_init.S | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/board/syteco/jadecpu/lowlevel_init.S b/board/syteco/jadecpu/lowlevel_init.S new file mode 100644 index 0000000000..5ad4dceb92 --- /dev/null +++ b/board/syteco/jadecpu/lowlevel_init.S @@ -0,0 +1,265 @@ +/* + * Board specific setup info + * + * (C) Copyright 2007, mycable GmbH + * Carsten Schneider <cs@mycable.de>, Alexander Bigga <ab@mycable.de> + * + * (C) Copyright 2003, ARM Ltd. + * Philippe Robin, <philippe.robin@arm.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/macro.h> +#include <asm/arch/mb86r0x.h> +#include <asm/arch/asm-offsets.h> + +/* Set up the platform, once the cpu has been initialized */ +.globl lowlevel_init +lowlevel_init: +/* + * Initialize Clock Reset Generator (CRG) + */ + + ldr r0, =MB86R0x_CRG_BASE + + /* Not change the initial value that is set by external pin.*/ +WAIT_PLL: + ldr r2, [r0, #CRG_CRPR] /* Wait for PLLREADY */ + tst r2, #MB86R0x_CRG_CRPR_PLLRDY + beq WAIT_PLL + + /* Set clock gate control */ + ldr r1, =CONFIG_SYS_CRG_CRHA_INIT + str r1, [r0, #CRG_CRHA] + ldr r1, =CONFIG_SYS_CRG_CRPA_INIT + str r1, [r0, #CRG_CRPA] + ldr r1, =CONFIG_SYS_CRG_CRPB_INIT + str r1, [r0, #CRG_CRPB] + ldr r1, =CONFIG_SYS_CRG_CRHB_INIT + str r1, [r0, #CRG_CRHB] + ldr r1, =CONFIG_SYS_CRG_CRAM_INIT + str r1, [r0, #CRG_CRAM] + +/* + * Initialize External Bus Interface + */ + ldr r0, =MB86R0x_MEMC_BASE + + ldr r1, =CONFIG_SYS_MEMC_MCFMODE0_INIT + str r1, [r0, #MEMC_MCFMODE0] + ldr r1, =CONFIG_SYS_MEMC_MCFMODE2_INIT + str r1, [r0, #MEMC_MCFMODE2] + ldr r1, =CONFIG_SYS_MEMC_MCFMODE4_INIT + str r1, [r0, #MEMC_MCFMODE4] + + ldr r1, =CONFIG_SYS_MEMC_MCFTIM0_INIT + str r1, [r0, #MEMC_MCFTIM0] + ldr r1, =CONFIG_SYS_MEMC_MCFTIM2_INIT + str r1, [r0, #MEMC_MCFTIM2] + ldr r1, =CONFIG_SYS_MEMC_MCFTIM4_INIT + str r1, [r0, #MEMC_MCFTIM4] + + ldr r1, =CONFIG_SYS_MEMC_MCFAREA0_INIT + str r1, [r0, #MEMC_MCFAREA0] + ldr r1, =CONFIG_SYS_MEMC_MCFAREA2_INIT + str r1, [r0, #MEMC_MCFAREA2] + ldr r1, =CONFIG_SYS_MEMC_MCFAREA4_INIT + str r1, [r0, #MEMC_MCFAREA4] + +/* + * Initialize DDR2 Controller + */ + + /* Wait for PLL LOCK up time or more */ + wait_timer 20 + + /* + * (2) Initialize DDRIF + */ + ldr r0, =MB86R0x_DDR2_BASE + ldr r1, =CONFIG_SYS_DDR2_DRIMS_INIT + strh r1, [r0, #DDR2_DRIMS] + + /* + * (3) Wait for 20MCKPs(120nsec) or more + */ + wait_timer 20 + + /* + * (4) IRESET/IUSRRST release + */ + ldr r0, =MB86R0x_CCNT_BASE + ldr r1, =CONFIG_SYS_CCNT_CDCRC_INIT_1 + str r1, [r0, #CCNT_CDCRC] + + /* + * (5) Wait for 20MCKPs(120nsec) or more + */ + wait_timer 20 + + /* + * (6) IDLLRST release + */ + ldr r0, =MB86R0x_CCNT_BASE + ldr r1, =CONFIG_SYS_CCNT_CDCRC_INIT_2 + str r1, [r0, #CCNT_CDCRC] + + /* + * (7+8) Wait for 200us(=200000ns) or more (DDR2 Spec) + */ + wait_timer 33536 + + /* + * (9) MCKE ON + */ + ldr r0, =MB86R0x_DDR2_BASE + ldr r1, =CONFIG_SYS_DDR2_DRIC1_INIT + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_DRIC2_INIT + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =CONFIG_SYS_DDR2_DRCA_INIT + strh r1, [r0, #DDR2_DRCA] + ldr r1, =MB86R0x_DDR2_DRCI_INIT + strh r1, [r0, #DDR2_DRIC] + + /* + * (10) Initialize SDRAM + */ + + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + wait_timer 67 /* 400ns wait */ + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_1 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_1 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_2 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_2 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_3 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_3 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_4 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_4 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_5 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_5 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + wait_timer 200 + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_6 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_6 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_7 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_7 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + wait_timer 18 /* 105ns wait */ + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_8 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_8 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + wait_timer 200 /* MRS to OCD: 200clock */ + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_9 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_9 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC1_10 + strh r1, [r0, #DDR2_DRIC1] + ldr r1, =CONFIG_SYS_DDR2_INIT_DRIC2_10 + strh r1, [r0, #DDR2_DRIC2] + ldr r1, =MB86R0x_DDR2_DRCI_CMD + strh r1, [r0, #DDR2_DRIC] + + ldr r1, =CONFIG_SYS_DDR2_DRCM_INIT + strh r1, [r0, #DDR2_DRCM] + + ldr r1, =CONFIG_SYS_DDR2_DRCST1_INIT + strh r1, [r0, #DDR2_DRCST1] + + ldr r1, =CONFIG_SYS_DDR2_DRCST2_INIT + strh r1, [r0, #DDR2_DRCST2] + + ldr r1, =CONFIG_SYS_DDR2_DRCR_INIT + strh r1, [r0, #DDR2_DRCR] + + ldr r1, =CONFIG_SYS_DDR2_DRCF_INIT + strh r1, [r0, #DDR2_DRCF] + + ldr r1, =CONFIG_SYS_DDR2_DRASR_INIT + strh r1, [r0, #DDR2_DRASR] + + /* + * (11) ODT setting + */ + ldr r1, =CONFIG_SYS_DDR2_DROBS_INIT + strh r1, [r0, #DDR2_DROBS] + ldr r1, =CONFIG_SYS_DDR2_DROABA_INIT + strh r1, [r0, #DDR2_DROABA] + ldr r1, =CONFIG_SYS_DDR2_DRIBSODT1_INIT + strh r1, [r0, #DDR2_DRIBSODT1] + + /* + * (12) Shift to ODTCONT ON (SDRAM side) and DDR2 usual operation mode + */ + ldr r1, =CONFIG_SYS_DDR2_DROS_INIT + strh r1, [r0, #DDR2_DROS] + ldr r1, =MB86R0x_DDR2_DRCI_NORMAL + strh r1, [r0, #DDR2_DRIC] + + mov pc, lr |
