| /* |
| * Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <asm/arch/imx-regs.h> |
| |
| .macro REG reg, val |
| ldr r2, =\reg |
| ldr r3, =\val |
| str r3, [r2] |
| .endm |
| |
| .macro REG8 reg, val |
| ldr r2, =\reg |
| ldr r3, =\val |
| strb r3, [r2] |
| .endm |
| |
| .macro DELAY loops |
| ldr r2, =\loops |
| 1: |
| subs r2, r2, #1 |
| nop |
| bcs 1b |
| .endm |
| |
| /* RedBoot: AIPS setup - Only setup MPROTx registers. |
| * The PACR default values are good.*/ |
| .macro init_aips |
| /* |
| * Set all MPROTx to be non-bufferable, trusted for R/W, |
| * not forced to user-mode. |
| */ |
| ldr r0, =0x43F00000 |
| ldr r1, =0x77777777 |
| str r1, [r0, #0x00] |
| str r1, [r0, #0x04] |
| ldr r0, =0x53F00000 |
| str r1, [r0, #0x00] |
| str r1, [r0, #0x04] |
| |
| /* |
| * Clear the on and off peripheral modules Supervisor Protect bit |
| * for SDMA to access them. Did not change the AIPS control registers |
| * (offset 0x20) access type |
| */ |
| ldr r0, =0x43F00000 |
| ldr r1, =0x0 |
| str r1, [r0, #0x40] |
| str r1, [r0, #0x44] |
| str r1, [r0, #0x48] |
| str r1, [r0, #0x4C] |
| ldr r1, [r0, #0x50] |
| and r1, r1, #0x00FFFFFF |
| str r1, [r0, #0x50] |
| |
| ldr r0, =0x53F00000 |
| ldr r1, =0x0 |
| str r1, [r0, #0x40] |
| str r1, [r0, #0x44] |
| str r1, [r0, #0x48] |
| str r1, [r0, #0x4C] |
| ldr r1, [r0, #0x50] |
| and r1, r1, #0x00FFFFFF |
| str r1, [r0, #0x50] |
| .endm /* init_aips */ |
| |
| /* RedBoot: MAX (Multi-Layer AHB Crossbar Switch) setup */ |
| .macro init_max |
| ldr r0, =0x43F04000 |
| /* MPR - priority is M4 > M2 > M3 > M5 > M0 > M1 */ |
| ldr r1, =0x00302154 |
| str r1, [r0, #0x000] /* for S0 */ |
| str r1, [r0, #0x100] /* for S1 */ |
| str r1, [r0, #0x200] /* for S2 */ |
| str r1, [r0, #0x300] /* for S3 */ |
| str r1, [r0, #0x400] /* for S4 */ |
| /* SGPCR - always park on last master */ |
| ldr r1, =0x10 |
| str r1, [r0, #0x010] /* for S0 */ |
| str r1, [r0, #0x110] /* for S1 */ |
| str r1, [r0, #0x210] /* for S2 */ |
| str r1, [r0, #0x310] /* for S3 */ |
| str r1, [r0, #0x410] /* for S4 */ |
| /* MGPCR - restore default values */ |
| ldr r1, =0x0 |
| str r1, [r0, #0x800] /* for M0 */ |
| str r1, [r0, #0x900] /* for M1 */ |
| str r1, [r0, #0xA00] /* for M2 */ |
| str r1, [r0, #0xB00] /* for M3 */ |
| str r1, [r0, #0xC00] /* for M4 */ |
| str r1, [r0, #0xD00] /* for M5 */ |
| .endm /* init_max */ |
| |
| /* RedBoot: M3IF setup */ |
| .macro init_m3if |
| /* Configure M3IF registers */ |
| ldr r1, =0xB8003000 |
| /* |
| * M3IF Control Register (M3IFCTL) |
| * MRRP[0] = L2CC0 not on priority list (0 << 0) = 0x00000000 |
| * MRRP[1] = L2CC1 not on priority list (0 << 0) = 0x00000000 |
| * MRRP[2] = MBX not on priority list (0 << 0) = 0x00000000 |
| * MRRP[3] = MAX1 not on priority list (0 << 0) = 0x00000000 |
| * MRRP[4] = SDMA not on priority list (0 << 0) = 0x00000000 |
| * MRRP[5] = MPEG4 not on priority list (0 << 0) = 0x00000000 |
| * MRRP[6] = IPU1 on priority list (1 << 6) = 0x00000040 |
| * MRRP[7] = IPU2 not on priority list (0 << 0) = 0x00000000 |
| * ------------ |
| * 0x00000040 |
| */ |
| ldr r0, =0x00000040 |
| str r0, [r1] /* M3IF control reg */ |
| .endm /* init_m3if */ |
| |
| /* RedBoot: To support 133MHz DDR */ |
| .macro init_drive_strength |
| /* |
| * Disable maximum drive strength SDRAM/DDR lines by clearing DSE1 bits |
| * in SW_PAD_CTL registers |
| */ |
| |
| /* SDCLK */ |
| ldr r1, =0x43FAC200 |
| ldr r0, [r1, #0x6C] |
| bic r0, r0, #(1 << 12) |
| str r0, [r1, #0x6C] |
| |
| /* CAS */ |
| ldr r0, [r1, #0x70] |
| bic r0, r0, #(1 << 22) |
| str r0, [r1, #0x70] |
| |
| /* RAS */ |
| ldr r0, [r1, #0x74] |
| bic r0, r0, #(1 << 2) |
| str r0, [r1, #0x74] |
| |
| /* CS2 (CSD0) */ |
| ldr r0, [r1, #0x7C] |
| bic r0, r0, #(1 << 22) |
| str r0, [r1, #0x7C] |
| |
| /* DQM3 */ |
| ldr r0, [r1, #0x84] |
| bic r0, r0, #(1 << 22) |
| str r0, [r1, #0x84] |
| |
| /* DQM2, DQM1, DQM0, SD31-SD0, A25-A0, MA10 (0x288..0x2DC) */ |
| ldr r2, =22 /* (0x2E0 - 0x288) / 4 = 22 */ |
| pad_loop: |
| ldr r0, [r1, #0x88] |
| bic r0, r0, #(1 << 22) |
| bic r0, r0, #(1 << 12) |
| bic r0, r0, #(1 << 2) |
| str r0, [r1, #0x88] |
| add r1, r1, #4 |
| subs r2, r2, #0x1 |
| bne pad_loop |
| .endm /* init_drive_strength */ |
| |
| /* CPLD on CS4 setup */ |
| .macro init_cs4 |
| ldr r0, =WEIM_BASE |
| ldr r1, =0x0000D843 |
| str r1, [r0, #0x40] |
| ldr r1, =0x22252521 |
| str r1, [r0, #0x44] |
| ldr r1, =0x22220A00 |
| str r1, [r0, #0x48] |
| .endm /* init_cs4 */ |
| |
| .globl lowlevel_init |
| lowlevel_init: |
| |
| /* Redboot initializes very early AIPS, what for? |
| * Then it also initializes Multi-Layer AHB Crossbar Switch, |
| * M3IF */ |
| /* Also setup the Peripheral Port Remap register inside the core */ |
| ldr r0, =0x40000015 /* start from AIPS 2GB region */ |
| mcr p15, 0, r0, c15, c2, 4 |
| |
| init_aips |
| |
| init_max |
| |
| init_m3if |
| |
| init_drive_strength |
| |
| init_cs4 |
| |
| /* Image Processing Unit: */ |
| /* Too early to switch display on? */ |
| REG IPU_CONF, IPU_CONF_DI_EN /* Switch on Display Interface */ |
| /* Clock Control Module: */ |
| REG CCM_CCMR, 0x074B0BF5 /* Use CKIH, MCU PLL off */ |
| |
| DELAY 0x40000 |
| |
| REG CCM_CCMR, 0x074B0BF5 | CCMR_MPE /* MCU PLL on */ |
| REG CCM_CCMR, (0x074B0BF5 | CCMR_MPE) & ~CCMR_MDS /* Switch to MCU PLL */ |
| |
| /* PBC CPLD on CS4 */ |
| mov r1, #CS4_BASE |
| ldrh r1, [r1, #0x2] |
| /* Is 27MHz switch set? */ |
| ands r1, r1, #0x10 |
| |
| /* 532-133-66.5 */ |
| ldr r0, =CCM_BASE |
| ldr r1, =0xFF871D58 |
| /* PDR0 */ |
| str r1, [r0, #0x4] |
| ldreq r1, MPCTL_PARAM_532 |
| ldrne r1, MPCTL_PARAM_532_27 |
| /* MPCTL */ |
| str r1, [r0, #0x10] |
| |
| /* Set UPLL=240MHz, USB=60MHz */ |
| ldr r1, =0x49FCFE7F |
| /* PDR1 */ |
| str r1, [r0, #0x8] |
| ldreq r1, UPCTL_PARAM_240 |
| ldrne r1, UPCTL_PARAM_240_27 |
| /* UPCTL */ |
| str r1, [r0, #0x14] |
| /* default CLKO to 1/8 of the ARM core */ |
| mov r1, #0x000002C0 |
| add r1, r1, #0x00000006 |
| /* COSR */ |
| str r1, [r0, #0x1c] |
| |
| /* RedBoot sets 0x3f, 7, 7, 3, 5, 1, 3, 0 */ |
| /* REG CCM_PDR0, PDR0_CSI_PODF(0x3f) | PDR0_CSI_PRDF(7) | PDR0_PER_PODF(7) | PDR0_HSP_PODF(2) | PDR0_NFC_PODF(6) | PDR0_IPG_PODF(1) | PDR0_MAX_PODF(2) | PDR0_MCU_PODF(0)*/ |
| |
| /* Redboot: 0, 51, 10, 12 / 0, 14, 9, 13 */ |
| /* REG CCM_MPCTL, PLL_PD(0) | PLL_MFD(0x33) | PLL_MFI(7) | PLL_MFN(0x23)*/ |
| /* Default: 1, 4, 12, 1 */ |
| REG CCM_SPCTL, PLL_PD(1) | PLL_MFD(4) | PLL_MFI(12) | PLL_MFN(1) |
| |
| /* B8xxxxxx - NAND, 8xxxxxxx - CSD0 RAM */ |
| REG 0xB8001010, 0x00000004 |
| REG 0xB8001004, 0x006ac73a |
| REG 0xB8001000, 0x92100000 |
| REG 0x80000f00, 0x12344321 |
| REG 0xB8001000, 0xa2100000 |
| REG 0x80000000, 0x12344321 |
| REG 0x80000000, 0x12344321 |
| REG 0xB8001000, 0xb2100000 |
| REG8 0x80000033, 0xda |
| REG8 0x81000000, 0xff |
| REG 0xB8001000, 0x82226080 |
| REG 0x80000000, 0xDEADBEEF |
| REG 0xB8001010, 0x0000000c |
| |
| mov pc, lr |
| |
| MPCTL_PARAM_532: |
| .word (((1-1) << 26) + ((52-1) << 16) + (10 << 10) + (12 << 0)) |
| MPCTL_PARAM_532_27: |
| .word (((1-1) << 26) + ((15-1) << 16) + (9 << 10) + (13 << 0)) |
| UPCTL_PARAM_240: |
| .word (((2-1) << 26) + ((13-1) << 16) + (9 << 10) + (3 << 0)) |
| UPCTL_PARAM_240_27: |
| .word (((2-1) << 26) + ((9 -1) << 16) + (8 << 10) + (8 << 0)) |