--- /dev/null
+/*
+ * 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>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+#include <version.h>
+#include <asm/macro.h>
+#include <asm/arch/mb86r0x.h>
+#include <generated/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
Code Review / kvmfornfv.git / blobdiff