diff options
Diffstat (limited to 'arch/mips/mach-mt7620/lowlevel_init.S')
| -rw-r--r-- | arch/mips/mach-mt7620/lowlevel_init.S | 328 |
1 files changed, 0 insertions, 328 deletions
diff --git a/arch/mips/mach-mt7620/lowlevel_init.S b/arch/mips/mach-mt7620/lowlevel_init.S deleted file mode 100644 index aa707e0de6..0000000000 --- a/arch/mips/mach-mt7620/lowlevel_init.S +++ /dev/null @@ -1,328 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ */ -/* - * (c) 2018 Stefan Roese <sr@denx.de> - * - * This code is mostly based on the code extracted from this MediaTek - * github repository: - * - * https://github.com/MediaTek-Labs/linkit-smart-uboot.git - * - * I was not able to find a specific license or other developers - * copyrights here, so I can't add them here. - */ - -#include <config.h> -#include <asm/regdef.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/asm.h> -#include "mt76xx.h" - -#ifndef BIT -#define BIT(nr) (1 << (nr)) -#endif - -#define DELAY_USEC(us) ((us) / 100) - -#define DDR_CFG1_CHIP_WIDTH_MASK (0x3 << 16) -#define DDR_CFG1_BUS_WIDTH_MASK (0x3 << 12) - -#if defined(CONFIG_ONBOARD_DDR2_SIZE_256MBIT) -#define DDR_CFG1_SIZE_VAL 0x222e2323 -#define DDR_CFG4_SIZE_VAL 7 -#endif -#if defined(CONFIG_ONBOARD_DDR2_SIZE_512MBIT) -#define DDR_CFG1_SIZE_VAL 0x22322323 -#define DDR_CFG4_SIZE_VAL 9 -#endif -#if defined(CONFIG_ONBOARD_DDR2_SIZE_1024MBIT) -#define DDR_CFG1_SIZE_VAL 0x22362323 -#define DDR_CFG4_SIZE_VAL 9 -#endif -#if defined(CONFIG_ONBOARD_DDR2_SIZE_2048MBIT) -#define DDR_CFG1_SIZE_VAL 0x223a2323 -#define DDR_CFG4_SIZE_VAL 9 -#endif - -#if defined(CONFIG_ONBOARD_DDR2_CHIP_WIDTH_8BIT) -#define DDR_CFG1_CHIP_WIDTH_VAL (0x1 << 16) -#endif -#if defined(CONFIG_ONBOARD_DDR2_CHIP_WIDTH_16BIT) -#define DDR_CFG1_CHIP_WIDTH_VAL (0x2 << 16) -#endif - -#if defined(CONFIG_ONBOARD_DDR2_BUS_WIDTH_16BIT) -#define DDR_CFG1_BUS_WIDTH_VAL (0x2 << 12) -#endif -#if defined(CONFIG_ONBOARD_DDR2_BUS_WIDTH_32BIT) -#define DDR_CFG1_BUS_WIDTH_VAL (0x3 << 12) -#endif - - .set noreorder - -LEAF(lowlevel_init) - - /* Load base addresses as physical addresses for later usage */ - li s0, CKSEG1ADDR(MT76XX_SYSCTL_BASE) - li s1, CKSEG1ADDR(MT76XX_MEMCTRL_BASE) - li s2, CKSEG1ADDR(MT76XX_RGCTRL_BASE) - - /* polling CPLL is ready */ - li t1, DELAY_USEC(1000000) - la t5, MT76XX_ROM_STATUS_REG -1: - lw t2, 0(t5) - andi t2, t2, 0x1 - bnez t2, CPLL_READY - subu t1, t1, 1 - bgtz t1, 1b - nop - la t0, MT76XX_CLKCFG0_REG - lw t3, 0(t0) - ori t3, t3, 0x1 - sw t3, 0(t0) - b CPLL_DONE - nop -CPLL_READY: - la t0, MT76XX_CLKCFG0_REG - lw t1, 0(t0) - li t2, ~0x0c - and t1, t1, t2 - ori t1, t1, 0xc - sw t1, 0(t0) - la t0, MT76XX_DYN_CFG0_REG - lw t3, 0(t0) - li t5, ~((0x0f << 8) | (0x0f << 0)) - and t3, t3, t5 - li t5, (10 << 8) | (1 << 0) - or t3, t3, t5 - sw t3, 0(t0) - la t0, MT76XX_CLKCFG0_REG - lw t3, 0(t0) - li t4, ~0x0F - and t3, t3, t4 - ori t3, t3, 0xc - sw t3, 0(t0) - lw t3, 0(t0) - ori t3, t3, 0x08 - sw t3, 0(t0) - -CPLL_DONE: - /* Reset MC */ - lw t2, 0x34(s0) - ori t2, BIT(10) - sw t2, 0x34(s0) - nop - - /* - * SDR and DDR initialization: delay 200us - */ - li t0, DELAY_USEC(200 + 40) - li t1, 0x1 -1: - sub t0, t0, t1 - bnez t0, 1b - nop - - /* set DRAM IO PAD for MT7628IC */ - /* DDR LDO Enable */ - lw t4, 0x100(s2) - li t2, BIT(31) - or t4, t4, t2 - sw t4, 0x100(s2) - lw t4, 0x10c(s2) - j LDO_1P8V - nop -LDO_1P8V: - li t2, ~BIT(6) - and t4, t4, t2 - sw t4, 0x10c(s2) - j DDRLDO_SOFT_START -LDO_2P5V: - /* suppose external DDR1 LDO 2.5V */ - li t2, BIT(6) - or t4, t4, t2 - sw t4, 0x10c(s2) - -DDRLDO_SOFT_START: - lw t2, 0x10c(s2) - li t3, BIT(16) - or t2, t2, t3 - sw t2, 0x10c(s2) - li t3, DELAY_USEC(250*50) -LDO_DELAY: - subu t3, t3, 1 - bnez t3, LDO_DELAY - nop - - lw t2, 0x10c(s2) - li t3, BIT(18) - or t2, t2, t3 - sw t2, 0x10c(s2) - -SET_RG_BUCK_FPWM: - lw t2, 0x104(s2) - ori t2, t2, BIT(10) - sw t2, 0x104(s2) - -DDR_PAD_CFG: - /* clean CLK PAD */ - lw t2, 0x704(s2) - li t8, 0xfffff0f0 - and t2, t2, t8 - /* clean CMD PAD */ - lw t3, 0x70c(s2) - li t8, 0xfffff0f0 - and t3, t3, t8 - /* clean DQ IPAD */ - lw t4, 0x710(s2) - li t8, 0xfffff8ff - and t4, t4, t8 - /* clean DQ OPAD */ - lw t5, 0x714(s2) - li t8, 0xfffff0f0 - and t5, t5, t8 - /* clean DQS IPAD */ - lw t6, 0x718(s2) - li t8, 0xfffff8ff - and t6, t6, t8 - /* clean DQS OPAD */ - lw t7, 0x71c(s2) - li t8, 0xfffff0f0 - and t7, t7, t8 - - lw t9, 0xc(s0) - srl t9, t9, 16 - andi t9, t9, 0x1 - bnez t9, MT7628_AN_DDR1_PAD -MT7628_KN_PAD: - li t8, 0x00000303 - or t2, t2, t8 - or t3, t3, t8 - or t5, t5, t8 - or t7, t7, t8 - li t8, 0x00000000 - or t4, t4, t8 - or t6, t6, t8 - j SET_PAD_CFG -MT7628_AN_DDR1_PAD: - lw t1, 0x10(s0) - andi t1, t1, 0x1 - beqz t1, MT7628_AN_DDR2_PAD - li t8, 0x00000c0c - or t2, t2, t8 - li t8, 0x00000202 - or t3, t3, t8 - li t8, 0x00000707 - or t5, t5, t8 - li t8, 0x00000c0c - or t7, t7, t8 - li t8, 0x00000000 - or t4, t4, t8 - or t6, t6, t8 - j SET_PAD_CFG -MT7628_AN_DDR2_PAD: - li t8, 0x00000c0c - or t2, t2, t8 - li t8, 0x00000202 - or t3, t3, t8 - li t8, 0x00000404 - or t5, t5, t8 - li t8, 0x00000c0c - or t7, t7, t8 - li t8, 0x00000000 /* ODT off */ - or t4, t4, t8 - or t6, t6, t8 - -SET_PAD_CFG: - sw t2, 0x704(s2) - sw t3, 0x70c(s2) - sw t4, 0x710(s2) - sw t5, 0x714(s2) - sw t6, 0x718(s2) - sw t7, 0x71c(s2) - - /* - * DDR initialization: reset pin to 0 - */ - lw t2, 0x34(s0) - and t2, ~BIT(10) - sw t2, 0x34(s0) - nop - - /* - * DDR initialization: wait til reg DDR_CFG1 bit 21 equal to 1 (ready) - */ -DDR_READY: - li t1, DDR_CFG1_REG - lw t0, 0(t1) - nop - and t2, t0, BIT(21) - beqz t2, DDR_READY - nop - - /* - * DDR initialization - * - * Only DDR2 supported right now. DDR2 support can be added, once - * boards using it will get added to mainline U-Boot. - */ - li t1, DDR_CFG2_REG - lw t0, 0(t1) - nop - and t0, ~BIT(30) - and t0, ~(7 << 4) - or t0, (4 << 4) - or t0, BIT(30) - or t0, BIT(11) - sw t0, 0(t1) - nop - - li t1, DDR_CFG3_REG - lw t2, 0(t1) - /* Disable ODT; reference board ok, ev board fail */ - and t2, ~BIT(6) - or t2, BIT(2) - li t0, DDR_CFG4_REG - lw t1, 0(t0) - li t2, ~(0x01f | 0x0f0) - and t1, t1, t2 - ori t1, t1, DDR_CFG4_SIZE_VAL - sw t1, 0(t0) - nop - - /* - * DDR initialization: config size and width on reg DDR_CFG1 - */ - li t6, DDR_CFG1_SIZE_VAL - - and t6, ~DDR_CFG1_CHIP_WIDTH_MASK - or t6, DDR_CFG1_CHIP_WIDTH_VAL - - /* CONFIG DDR_CFG1[13:12] about TOTAL WIDTH */ - and t6, ~DDR_CFG1_BUS_WIDTH_MASK - or t6, DDR_CFG1_BUS_WIDTH_VAL - - li t5, DDR_CFG1_REG - sw t6, 0(t5) - nop - - /* - * DDR: enable self auto refresh for power saving - * enable it by default for both RAM and ROM version (for CoC) - */ - lw t1, 0x14(s1) - nop - and t1, 0xff000000 - or t1, 0x01 - sw t1, 0x14(s1) - nop - lw t1, 0x10(s1) - nop - or t1, 0x10 - sw t1, 0x10(s1) - nop - - jr ra - nop - END(lowlevel_init) |