diff options
Diffstat (limited to 'board/davedenx/qong/lowlevel_init.S')
| -rw-r--r-- | board/davedenx/qong/lowlevel_init.S | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/board/davedenx/qong/lowlevel_init.S b/board/davedenx/qong/lowlevel_init.S deleted file mode 100644 index 8887023f8c..0000000000 --- a/board/davedenx/qong/lowlevel_init.S +++ /dev/null @@ -1,223 +0,0 @@ -/* - * Copyright (C) 2009, Emcraft Systems, Ilya Yanok <yanok@emcraft.com> - * - * Based on board/freescale/mx31ads/lowlevel_init.S - * by Guennadi Liakhovetski. - * - * 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 - -.macro SETUP_RAM cfg, ctl - /* B8xxxxxx - NAND, 8xxxxxxx - CSD0 RAM */ - REG 0xB8001010, 0x00000004 - ldr r3, =\cfg - ldr r2, =WEIM_ESDCFG0 - str r3, [r2] - REG 0xB8001000, 0x92100000 - REG 0x80000f00, 0x12344321 - REG 0xB8001000, 0xa2100000 - REG 0x80000000, 0x12344321 - REG 0x80000000, 0x12344321 - REG 0xB8001000, 0xb2100000 - REG8 0x80000033, 0xda - REG8 0x81000000, 0xff - ldr r3, =\ctl - ldr r2, =WEIM_ESDCTL0 - str r3, [r2] - REG 0x80000000, 0xDEADBEEF - REG 0xB8001010, 0x0000000c - -.endm -/* 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, =IOMUXC_SW_PAD_CTL(0x2b) - 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 */ - -.globl lowlevel_init -lowlevel_init: - - init_drive_strength - - /* Image Processing Unit: */ - /* Too early to switch display on? */ - /* Switch on Display Interface */ - REG IPU_CONF, IPU_CONF_DI_EN - /* Clock Control Module: */ - REG CCM_CCMR, 0x074B0BF5 /* Use CKIH, MCU PLL off */ - - DELAY 0x40000 - - REG CCM_CCMR, 0x074B0BF5 | CCMR_MPE /* MCU PLL on */ - /* Switch to MCU PLL */ - REG CCM_CCMR, (0x074B0BF5 | CCMR_MPE) & ~CCMR_MDS - - /* 399-133-66.5 */ - ldr r0, =CCM_BASE - ldr r1, =0xFF871650 - /* PDR0 */ - str r1, [r0, #0x4] - ldr r1, MPCTL_PARAM_399 - /* MPCTL */ - str r1, [r0, #0x10] - - /* Set UPLL=240MHz, USB=60MHz */ - ldr r1, =0x49FCFE7F - /* PDR1 */ - str r1, [r0, #0x8] - ldr r1, UPCTL_PARAM_240 - /* UPCTL */ - str r1, [r0, #0x14] - /* default CLKO to 1/8 of the ARM core */ - mov r1, #0x00000208 - /* COSR */ - str r1, [r0, #0x1c] - - /* Default: 1, 4, 12, 1 */ - REG CCM_SPCTL, PLL_PD(1) | PLL_MFD(4) | PLL_MFI(12) | PLL_MFN(1) - -check_ddr_module: -/* Set stackpointer in internal RAM to call get_ram_size */ - ldr sp, =(IRAM_BASE_ADDR + IRAM_SIZE - 16) - stmfd sp!, {r0-r11, ip, lr} - mov ip, lr /* save link reg across call */ - - ldr r0,=0x08000000 - SETUP_RAM ESDCFG0_256MB, ESDCTL0_256MB - ldr r0,=0x80000000 - ldr r1,=0x10000000 - bl get_ram_size - ldr r1,=0x10000000 - cmp r0,r1 - beq restore_regs - SETUP_RAM ESDCFG0_128MB, ESDCTL0_128MB - ldr r0,=0x80000000 - ldr r1,=0x08000000 - bl get_ram_size - ldr r1,=0x08000000 - cmp r0,r1 - beq restore_regs - -restore_regs: - ldmfd sp!, {r0-r11, ip, lr} - mov lr, ip /* restore link reg */ - - mov pc, lr - - -MPCTL_PARAM_399: - .word (((1 - 1) << 26) + ((52 - 1) << 16) + (7 << 10) + (35 << 0)) -UPCTL_PARAM_240: - .word (((2 - 1) << 26) + ((13 - 1) << 16) + (9 << 10) + (3 << 0)) - - .equ ESDCFG0_128MB, \ - (0 << 21) + /* tXP */ \ - (1 << 20) + /* tWTR */ \ - (2 << 18) + /* tRP */ \ - (1 << 16) + /* tMRD */ \ - (0 << 15) + /* tWR */ \ - (5 << 12) + /* tRAS */ \ - (1 << 10) + /* tRRD */ \ - (3 << 8) + /* tCAS */ \ - (2 << 4) + /* tRCD */ \ - (0x0F << 0) /* tRC */ - - .equ ESDCTL0_128MB, \ - (1 << 31) + /* enable */ \ - (0 << 28) + /* mode */ \ - (0 << 27) + /* supervisor protect */ \ - (2 << 24) + /* 13 rows */ \ - (2 << 20) + /* 10 cols */ \ - (2 << 16) + /* 32 bit */ \ - (3 << 13) + /* 7.81us (64ms/8192) */ \ - (0 << 10) + /* power down timer */ \ - (0 << 8) + /* full page */ \ - (1 << 7) + /* burst length */ \ - (0 << 0) /* precharge timer */ - - .equ ESDCFG0_256MB, \ - (3 << 21) + /* tXP */ \ - (0 << 20) + /* tWTR */ \ - (2 << 18) + /* tRP */ \ - (1 << 16) + /* tMRD */ \ - (0 << 15) + /* tWR */ \ - (5 << 12) + /* tRAS */ \ - (1 << 10) + /* tRRD */ \ - (3 << 8) + /* tCAS */ \ - (2 << 4) + /* tRCD */ \ - (7 << 0) /* tRC */ - - .equ ESDCTL0_256MB, \ - (1 << 31) + \ - (0 << 28) + \ - (0 << 27) + \ - (3 << 24) + /* 14 rows */ \ - (2 << 20) + /* 10 cols */ \ - (2 << 16) + \ - (4 << 13) + /* 3.91us (64ms/16384) */ \ - (0 << 10) + \ - (0 << 8) + \ - (1 << 7) + \ - (0 << 0) |