| Magnus Lilja | d08e5ca | 2009-07-04 10:31:24 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2009 Magnus Lilja <lilja.magnus@gmail.com> |
| 3 | * |
| Wolfgang Denk | 1a45966 | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 4 | * SPDX-License-Identifier: GPL-2.0+ |
| Magnus Lilja | d08e5ca | 2009-07-04 10:31:24 +0200 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <config.h> |
| Stefano Babic | 8627111 | 2011-03-14 15:43:56 +0100 | [diff] [blame] | 8 | #include <asm/arch/imx-regs.h> |
| Magnus Lilja | d08e5ca | 2009-07-04 10:31:24 +0200 | [diff] [blame] | 9 | #include <asm/macro.h> |
| 10 | |
| 11 | .globl lowlevel_init |
| 12 | lowlevel_init: |
| 13 | /* Also setup the Peripheral Port Remap register inside the core */ |
| 14 | ldr r0, =ARM_PPMRR /* start from AIPS 2GB region */ |
| 15 | mcr p15, 0, r0, c15, c2, 4 |
| 16 | |
| 17 | write32 IPU_CONF, IPU_CONF_DI_EN |
| 18 | write32 CCM_CCMR, CCM_CCMR_SETUP |
| 19 | |
| 20 | wait_timer 0x40000 |
| 21 | |
| 22 | write32 CCM_CCMR, CCM_CCMR_SETUP | CCMR_MPE |
| 23 | write32 CCM_CCMR, (CCM_CCMR_SETUP | CCMR_MPE) & ~CCMR_MDS |
| 24 | |
| 25 | /* Set up clock to 532MHz */ |
| 26 | write32 CCM_PDR0, CCM_PDR0_SETUP_532MHZ |
| 27 | write32 CCM_MPCTL, CCM_MPCTL_SETUP_532MHZ |
| 28 | |
| 29 | write32 CCM_SPCTL, PLL_PD(1) | PLL_MFD(4) | PLL_MFI(12) | PLL_MFN(1) |
| 30 | |
| 31 | /* Set up MX31 DDR pins */ |
| 32 | write32 IOMUXC_SW_PAD_CTL_SDCKE1_SDCLK_SDCLK_B, 0 |
| 33 | write32 IOMUXC_SW_PAD_CTL_CAS_SDWE_SDCKE0, 0 |
| 34 | write32 IOMUXC_SW_PAD_CTL_BCLK_RW_RAS, 0 |
| 35 | write32 IOMUXC_SW_PAD_CTL_CS2_CS3_CS4, 0x1000 |
| 36 | write32 IOMUXC_SW_PAD_CTL_DQM3_EB0_EB1, 0 |
| 37 | write32 IOMUXC_SW_PAD_CTL_DQM0_DQM1_DQM2, 0 |
| 38 | write32 IOMUXC_SW_PAD_CTL_SD29_SD30_SD31, 0 |
| 39 | write32 IOMUXC_SW_PAD_CTL_SD26_SD27_SD28, 0 |
| 40 | write32 IOMUXC_SW_PAD_CTL_SD23_SD24_SD25, 0 |
| 41 | write32 IOMUXC_SW_PAD_CTL_SD20_SD21_SD22, 0 |
| 42 | write32 IOMUXC_SW_PAD_CTL_SD17_SD18_SD19, 0 |
| 43 | write32 IOMUXC_SW_PAD_CTL_SD14_SD15_SD16, 0 |
| 44 | write32 IOMUXC_SW_PAD_CTL_SD11_SD12_SD13, 0 |
| 45 | write32 IOMUXC_SW_PAD_CTL_SD8_SD9_SD10, 0 |
| 46 | write32 IOMUXC_SW_PAD_CTL_SD5_SD6_SD7, 0 |
| 47 | write32 IOMUXC_SW_PAD_CTL_SD2_SD3_SD4, 0 |
| 48 | write32 IOMUXC_SW_PAD_CTL_SDBA0_SD0_SD1, 0 |
| 49 | write32 IOMUXC_SW_PAD_CTL_A24_A25_SDBA1, 0 |
| 50 | write32 IOMUXC_SW_PAD_CTL_A21_A22_A23, 0 |
| 51 | write32 IOMUXC_SW_PAD_CTL_A18_A19_A20, 0 |
| 52 | write32 IOMUXC_SW_PAD_CTL_A15_A16_A17, 0 |
| 53 | write32 IOMUXC_SW_PAD_CTL_A12_A13_A14, 0 |
| 54 | write32 IOMUXC_SW_PAD_CTL_A10_MA10_A11, 0 |
| 55 | write32 IOMUXC_SW_PAD_CTL_A7_A8_A9, 0 |
| 56 | write32 IOMUXC_SW_PAD_CTL_A4_A5_A6, 0 |
| 57 | write32 IOMUXC_SW_PAD_CTL_A1_A2_A3, 0 |
| 58 | write32 IOMUXC_SW_PAD_CTL_VPG0_VPG1_A0, 0 |
| 59 | |
| 60 | /* Set up MX31 DDR Memory Controller */ |
| 61 | write32 WEIM_ESDMISC, ESDMISC_MDDR_SETUP |
| 62 | write32 WEIM_ESDCFG0, ESDCFG0_MDDR_SETUP |
| 63 | |
| 64 | /* Perform DDR init sequence */ |
| 65 | write32 WEIM_ESDCTL0, ESDCTL_PRECHARGE |
| 66 | write32 CSD0_BASE | 0x0f00, 0x12344321 |
| 67 | write32 WEIM_ESDCTL0, ESDCTL_AUTOREFRESH |
| 68 | write32 CSD0_BASE, 0x12344321 |
| 69 | write32 CSD0_BASE, 0x12344321 |
| 70 | write32 WEIM_ESDCTL0, ESDCTL_LOADMODEREG |
| 71 | write8 CSD0_BASE | 0x00000033, 0xda |
| 72 | write8 CSD0_BASE | 0x01000000, 0xff |
| 73 | write32 WEIM_ESDCTL0, ESDCTL_RW |
| 74 | write32 CSD0_BASE, 0xDEADBEEF |
| 75 | write32 WEIM_ESDMISC, ESDMISC_MDDR_RESET_DL |
| 76 | |
| 77 | mov pc, lr |