[PATCH 08/16] mips: mtmips: rewrite lowlevel codes of mt7628
Daniel Schwierzeck
daniel.schwierzeck at gmail.com
Wed Jan 8 16:56:09 CET 2020
Am 08.01.20 um 04:01 schrieb Weijie Gao:
> This patch rewrites the mtmips architecture with the following changes:
>
> 1. Move MT7628 soc parts into a subfolder.
> 2. Lock parts of D-Cache as temporary stack.
> 3. Reimplement DDR initialization in C language.
> 4. Reimplement DDR calibration in a clear logic.
> 5. Add full support for auto size detection for DDR1 and DDR2.
> 6. Use accurate CPU clock depending for timer and delay functions.
> Xtal:25MHz -> CPU:575MHz / Xtal:40MHz -> CPU:580MHz.
> 7. Remove unusable nodes from mt7628a.dtsi
>
> Note:
>
> print_cpuinfo() has incompatible parts with MT7620 so it's moved into
> mt7628 subfolder.
could you refactor this patch a little bit and move the following to
separate patches:
- the change of sysreset driver
- the update of global_data.h
- the update of the device tree files
- the removal of the deprecated drivers could be done in a separate last
patch
>
> Signed-off-by: Weijie Gao <weijie.gao at mediatek.com>
> ---
> arch/mips/dts/mt7628a.dtsi | 76 +---
> arch/mips/include/asm/global_data.h | 3 +
> arch/mips/mach-mtmips/Kconfig | 71 +---
> arch/mips/mach-mtmips/Makefile | 7 +-
> arch/mips/mach-mtmips/cpu.c | 58 +---
> arch/mips/mach-mtmips/ddr_cal.c | 211 +++++++++++
> arch/mips/mach-mtmips/ddr_calibrate.c | 309 -----------------
> arch/mips/mach-mtmips/ddr_init.c | 194 +++++++++++
> arch/mips/mach-mtmips/include/mach/ddr.h | 52 +++
> arch/mips/mach-mtmips/include/mach/mc.h | 180 ++++++++++
> arch/mips/mach-mtmips/lowlevel_init.S | 328 ------------------
> arch/mips/mach-mtmips/mt7628/Makefile | 5 +
> arch/mips/mach-mtmips/mt7628/ddr.c | 173 +++++++++
> arch/mips/mach-mtmips/mt7628/init.c | 109 ++++++
> arch/mips/mach-mtmips/mt7628/lowlevel_init.S | 155 +++++++++
> arch/mips/mach-mtmips/mt7628/mt7628.h | 90 +++++
> arch/mips/mach-mtmips/mt76xx.h | 32 --
> ...gardena-smart-gateway-mt7688-ram_defconfig | 2 +-
> .../gardena-smart-gateway-mt7688_defconfig | 4 +-
> configs/linkit-smart-7688-ram_defconfig | 2 +-
> configs/linkit-smart-7688_defconfig | 4 +-
> 21 files changed, 1195 insertions(+), 870 deletions(-)
> create mode 100644 arch/mips/mach-mtmips/ddr_cal.c
> delete mode 100644 arch/mips/mach-mtmips/ddr_calibrate.c
> create mode 100644 arch/mips/mach-mtmips/ddr_init.c
> create mode 100644 arch/mips/mach-mtmips/include/mach/ddr.h
> create mode 100644 arch/mips/mach-mtmips/include/mach/mc.h
> delete mode 100644 arch/mips/mach-mtmips/lowlevel_init.S
> create mode 100644 arch/mips/mach-mtmips/mt7628/Makefile
> create mode 100644 arch/mips/mach-mtmips/mt7628/ddr.c
> create mode 100644 arch/mips/mach-mtmips/mt7628/init.c
> create mode 100644 arch/mips/mach-mtmips/mt7628/lowlevel_init.S
> create mode 100644 arch/mips/mach-mtmips/mt7628/mt7628.h
> delete mode 100644 arch/mips/mach-mtmips/mt76xx.h
>
> diff --git a/arch/mips/dts/mt7628a.dtsi b/arch/mips/dts/mt7628a.dtsi
> index 76a80c8952..3d7b839e6d 100644
> --- a/arch/mips/dts/mt7628a.dtsi
> +++ b/arch/mips/dts/mt7628a.dtsi
> @@ -7,24 +7,6 @@
> #size-cells = <1>;
> compatible = "ralink,mt7628a-soc";
>
> - cpus {
> - #address-cells = <1>;
> - #size-cells = <0>;
> -
> - cpu at 0 {
> - compatible = "mti,mips24KEc";
> - device_type = "cpu";
> - reg = <0>;
> - };
> - };
> -
> - cpuintc: interrupt-controller {
> - #address-cells = <0>;
> - #interrupt-cells = <1>;
> - interrupt-controller;
> - compatible = "mti,cpu-interrupt-controller";
> - };
> -
> clk48m: clk48m at 0 {
> compatible = "fixed-clock";
>
> @@ -41,16 +23,11 @@
> #address-cells = <1>;
> #size-cells = <1>;
>
> - sysc: system-controller at 0 {
> - compatible = "ralink,mt7620a-sysc", "syscon";
> - reg = <0x0 0x100>;
> - };
> + resetctl-reboot {
> + compatible = "resetctl-reboot";
>
> - syscon-reboot {
> - compatible = "syscon-reboot";
> - regmap = <&sysc>;
> - offset = <0x34>;
> - mask = <0x1>;
> + resets = <&rstctrl MT7628_SYS_RST>;
> + reset-names = "sysreset";
> };
>
> clkctrl: clkctrl at 0x2c {
> @@ -223,32 +200,6 @@
>
> resets = <&rstctrl MT7628_TIMER_RST>;
> reset-names = "wdt";
> -
> - interrupt-parent = <&intc>;
> - interrupts = <24>;
> - };
> -
> - intc: interrupt-controller at 200 {
> - compatible = "ralink,rt2880-intc";
> - reg = <0x200 0x100>;
> -
> - interrupt-controller;
> - #interrupt-cells = <1>;
> -
> - resets = <&rstctrl MT7628_INT_RST>;
> - reset-names = "intc";
> -
> - interrupt-parent = <&cpuintc>;
> - interrupts = <2>;
> -
> - ralink,intc-registers = <0x9c 0xa0
> - 0x6c 0xa4
> - 0x80 0x78>;
> - };
> -
> - memory-controller at 300 {
> - compatible = "ralink,mt7620a-memc";
> - reg = <0x300 0x100>;
> };
>
> gpio at 600 {
> @@ -261,9 +212,6 @@
> resets = <&rstctrl MT7628_PIO_RST>;
> reset-names = "pio";
>
> - interrupt-parent = <&intc>;
> - interrupts = <6>;
> -
> gpio0: bank at 0 {
> reg = <0>;
> compatible = "mtk,mt7621-gpio-bank";
> @@ -311,9 +259,6 @@
> resets = <&rstctrl MT7628_UART0_RST>;
> reset-names = "uart0";
>
> - interrupt-parent = <&intc>;
> - interrupts = <20>;
> -
> reg-shift = <2>;
> };
>
> @@ -329,9 +274,6 @@
> resets = <&rstctrl MT7628_UART1_RST>;
> reset-names = "uart1";
>
> - interrupt-parent = <&intc>;
> - interrupts = <21>;
> -
> reg-shift = <2>;
> };
>
> @@ -347,9 +289,6 @@
> resets = <&rstctrl MT7628_UART2_RST>;
> reset-names = "uart2";
>
> - interrupt-parent = <&intc>;
> - interrupts = <22>;
> -
> reg-shift = <2>;
> };
> };
> @@ -361,8 +300,6 @@
>
> resets = <&rstctrl MT7628_EPHY_RST>;
> reset-names = "ephy";
> -
> - syscon = <&sysc>;
> };
>
> usb_phy: usb-phy at 10120000 {
> @@ -371,8 +308,6 @@
>
> #phy-cells = <0>;
>
> - ralink,sysctl = <&sysc>;
> -
> resets = <&rstctrl MT7628_UPHY_RST>;
> reset-names = "phy";
>
> @@ -386,9 +321,6 @@
>
> phys = <&usb_phy>;
> phy-names = "usb";
> -
> - interrupt-parent = <&intc>;
> - interrupts = <18>;
> };
>
> mmc: mmc at 10130000 {
> diff --git a/arch/mips/include/asm/global_data.h b/arch/mips/include/asm/global_data.h
> index 7b4ad083ba..4c30fab871 100644
> --- a/arch/mips/include/asm/global_data.h
> +++ b/arch/mips/include/asm/global_data.h
> @@ -27,6 +27,9 @@ struct arch_global_data {
> #ifdef CONFIG_MIPS_L2_CACHE
> unsigned short l2_line_size;
> #endif
> +#ifdef CONFIG_ARCH_MTMIPS
> + unsigned long timer_freq;
> +#endif
> };
>
> #include <asm-generic/global_data.h>
> diff --git a/arch/mips/mach-mtmips/Kconfig b/arch/mips/mach-mtmips/Kconfig
> index 8e10719b27..e0076b613f 100644
> --- a/arch/mips/mach-mtmips/Kconfig
> +++ b/arch/mips/mach-mtmips/Kconfig
> @@ -19,14 +19,22 @@ config SYS_ICACHE_SIZE
> config SYS_ICACHE_LINE_SIZE
> default 32
>
> +config SYS_TEXT_BASE
> + default 0x9c000000
> +
> choice
> prompt "MediaTek MIPS SoC select"
>
> config SOC_MT7628
> bool "MT7628"
> select MIPS_L1_CACHE_SHIFT_5
> + select MIPS_INIT_STACK_IN_SRAM
> + select MIPS_SRAM_INIT
> + select SYS_MIPS_CACHE_INIT_RAM_LOAD
> + select MIPS_OVERRIDE_GET_TBCLK
> select PINCTRL_MT7628
> select MTK_SERIAL
> + select SYSRESET_RESETCTL
> help
> This supports MediaTek MT7628/MT7688.
>
> @@ -78,69 +86,6 @@ config BOOT_ROM
>
> endchoice
>
> -choice
> - prompt "DDR2 size"
> -
> -config ONBOARD_DDR2_SIZE_256MBIT
> - bool "256MBit (32MByte) total size"
> - depends on BOOT_ROM
> - help
> - Use 256MBit (32MByte) of DDR total size
> -
> -config ONBOARD_DDR2_SIZE_512MBIT
> - bool "512MBit (64MByte) total size"
> - depends on BOOT_ROM
> - help
> - Use 512MBit (64MByte) of DDR total size
> -
> -config ONBOARD_DDR2_SIZE_1024MBIT
> - bool "1024MBit (128MByte) total size"
> - depends on BOOT_ROM
> - help
> - Use 1024MBit (128MByte) of DDR total size
> -
> -config ONBOARD_DDR2_SIZE_2048MBIT
> - bool "2048MBit (256MByte) total size"
> - depends on BOOT_ROM
> - help
> - Use 2048MBit (256MByte) of DDR total size
> -
> -endchoice
> -
> -choice
> - prompt "DDR2 chip width"
> -
> -config ONBOARD_DDR2_CHIP_WIDTH_8BIT
> - bool "8bit DDR chip width"
> - depends on BOOT_ROM
> - help
> - Use DDR chips with 8bit width
> -
> -config ONBOARD_DDR2_CHIP_WIDTH_16BIT
> - bool "16bit DDR chip width"
> - depends on BOOT_ROM
> - help
> - Use DDR chips with 16bit width
> -
> -endchoice
> -
> -choice
> - prompt "DDR2 bus width"
> -
> -config ONBOARD_DDR2_BUS_WIDTH_16BIT
> - bool "16bit DDR bus width"
> - depends on BOOT_ROM
> - help
> - Use 16bit DDR bus width
> -
> -config ONBOARD_DDR2_BUS_WIDTH_32BIT
> - bool "32bit DDR bus width"
> - depends on BOOT_ROM
> - help
> - Use 32bit DDR bus width
> -
> -endchoice
> -
> config SUPPORTS_BOOT_RAM
> bool
>
> diff --git a/arch/mips/mach-mtmips/Makefile b/arch/mips/mach-mtmips/Makefile
> index 1f3e65e8a5..72f0369030 100644
> --- a/arch/mips/mach-mtmips/Makefile
> +++ b/arch/mips/mach-mtmips/Makefile
> @@ -1,8 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0+
>
> obj-y += cpu.o
> +obj-y += ddr_init.o
> +obj-y += ddr_cal.o
>
> -ifndef CONFIG_SKIP_LOWLEVEL_INIT
> -obj-y += ddr_calibrate.o
> -obj-y += lowlevel_init.o
> -endif
> +obj-$(CONFIG_SOC_MT7628) += mt7628/
> diff --git a/arch/mips/mach-mtmips/cpu.c b/arch/mips/mach-mtmips/cpu.c
> index 7afc2c5940..459a9673eb 100644
> --- a/arch/mips/mach-mtmips/cpu.c
> +++ b/arch/mips/mach-mtmips/cpu.c
> @@ -4,67 +4,17 @@
> */
>
> #include <common.h>
> -#include <dm.h>
> -#include <ram.h>
> -#include <wdt.h>
> -#include <asm/io.h>
> +#include <malloc.h>
> #include <linux/io.h>
> #include <linux/sizes.h>
> -#include "mt76xx.h"
>
> -#define STR_LEN 6
> -
> -#ifdef CONFIG_BOOT_ROM
> -int mach_cpu_init(void)
> -{
> - ddr_calibrate();
> -
> - return 0;
> -}
> -#endif
> +DECLARE_GLOBAL_DATA_PTR;
>
> int dram_init(void)
> {
> +#ifdef CONFIG_SKIP_LOWLEVEL_INIT
> gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, SZ_256M);
> -
> - return 0;
> -}
> -
> -int print_cpuinfo(void)
> -{
> - static const char * const boot_str[] = { "PLL (3-Byte SPI Addr)",
> - "PLL (4-Byte SPI Addr)",
> - "XTAL (3-Byte SPI Addr)",
> - "XTAL (4-Byte SPI Addr)" };
> - const void *blob = gd->fdt_blob;
> - void __iomem *sysc_base;
> - char buf[STR_LEN + 1];
> - fdt_addr_t base;
> - fdt_size_t size;
> - char *str;
> - int node;
> - u32 val;
> -
> - /* Get system controller base address */
> - node = fdt_node_offset_by_compatible(blob, -1, "ralink,mt7620a-sysc");
> - if (node < 0)
> - return -FDT_ERR_NOTFOUND;
> -
> - base = fdtdec_get_addr_size_auto_noparent(blob, node, "reg",
> - 0, &size, true);
> - if (base == FDT_ADDR_T_NONE)
> - return -EINVAL;
> -
> - sysc_base = ioremap_nocache(base, size);
> -
> - str = (char *)sysc_base + MT76XX_CHIPID_OFFS;
> - snprintf(buf, STR_LEN + 1, "%s", str);
> - val = readl(sysc_base + MT76XX_CHIP_REV_ID_OFFS);
> - printf("CPU: %-*s Rev %ld.%ld - ", STR_LEN, buf,
> - (val & GENMASK(11, 8)) >> 8, val & GENMASK(3, 0));
> -
> - val = (readl(sysc_base + MT76XX_SYSCFG0_OFFS) & GENMASK(3, 1)) >> 1;
> - printf("Boot from %s\n", boot_str[val]);
> +#endif
>
> return 0;
> }
> diff --git a/arch/mips/mach-mtmips/ddr_cal.c b/arch/mips/mach-mtmips/ddr_cal.c
> new file mode 100644
> index 0000000000..0ea7c7d5e1
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/ddr_cal.c
> @@ -0,0 +1,211 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + *
> + * Author: Weijie Gao <weijie.gao at mediatek.com>
> + */
> +
> +#include <common.h>
> +#include <asm/addrspace.h>
> +#include <asm/cacheops.h>
> +#include <linux/bitops.h>
> +#include <linux/io.h>
> +#include <mach/mc.h>
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +#define COARSE_MIN_START 6
> +#define FINE_MIN_START 15
> +#define COARSE_MAX_START 7
> +#define FINE_MAX_START 0
> +
> +#define NUM_OF_CACHELINE 128
> +#define TEST_PAT_SIZE (NUM_OF_CACHELINE * CONFIG_SYS_CACHELINE_SIZE)
> +
> +#define INIT_DQS_VAL ((7 << DQS1_DELAY_COARSE_TUNING_S) | \
> + (4 << DQS1_DELAY_FINE_TUNING_S) | \
> + (7 << DQS0_DELAY_COARSE_TUNING_S) | \
> + (4 << DQS0_DELAY_FINE_TUNING_S))
> +
> +static inline void pref_op(int op, const volatile void *addr)
> +{
> + __asm__ __volatile__("pref %0, 0(%1)" : : "i" (op), "r" (addr));
> +}
> +
> +static inline int dqs_test_valid(void __iomem *memc, u32 memsize, u32 dqsval,
> + u32 bias)
> +{
> + u32 *nca, *ca;
> + u32 off;
> + int i;
> +
> + for (off = 0; off < memsize - TEST_PAT_SIZE; off += (memsize >> 6)) {
> + nca = (u32 *)KSEG1ADDR(off);
> + ca = (u32 *)KSEG0ADDR(off);
> +
> + writel(INIT_DQS_VAL, memc + MEMCTL_DDR_DQS_DLY_REG);
> + wmb();
> +
> + for (i = 0; i < TEST_PAT_SIZE / sizeof(u32); i++)
> + ca[i] = 0x1f1f1f1f;
> +
> + for (i = 0; i < TEST_PAT_SIZE / sizeof(u32); i++)
> + nca[i] = (u32)nca + i + bias;
> +
> + writel(dqsval, memc + MEMCTL_DDR_DQS_DLY_REG);
> + wmb();
> +
> + for (i = 0; i < TEST_PAT_SIZE; i += CONFIG_SYS_CACHELINE_SIZE)
> + mips_cache(HIT_INVALIDATE_D, (u8 *)ca + i);
> + wmb();
> +
> + for (i = 0; i < TEST_PAT_SIZE; i += CONFIG_SYS_CACHELINE_SIZE)
> + pref_op(0, (u8 *)ca + i);
> +
> + for (i = 0; i < TEST_PAT_SIZE / sizeof(u32); i++) {
> + if (ca[i] != (u32)nca + i + bias)
> + return -1;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static inline u32 dqs_find_max(void __iomem *memc, u32 memsize, u32 initval,
> + u32 maxval, u32 shift, u32 regval)
> +{
> + u32 fieldval = initval, dqsval;
> +
> + do {
> + dqsval = regval | (fieldval << shift);
> +
> + if (dqs_test_valid(memc, memsize, dqsval, 3))
> + break;
> +
> + fieldval++;
> + } while (fieldval <= maxval);
> +
> + return fieldval;
> +}
> +
> +static inline u32 dqs_find_min(void __iomem *memc, u32 memsize, u32 initval,
> + u32 minval, u32 shift, u32 regval)
> +{
> + u32 fieldval = initval, dqsval;
> +
> + while (fieldval > minval) {
> + dqsval = regval | (fieldval << shift);
> +
> + if (dqs_test_valid(memc, memsize, dqsval, 1)) {
> + fieldval++;
> + break;
> + }
> +
> + fieldval--;
> + }
> +
> + return fieldval;
> +}
> +
> +void ddr_calibrate(void __iomem *memc, u32 memsize, u32 bw)
> +{
> + u32 dqs_coarse_min, dqs_coarse_max, dqs_coarse_val;
> + u32 dqs_fine_min, dqs_fine_max, dqs_fine_val;
> + u32 dqs_coarse_min_limit, dqs_fine_min_limit;
> + u32 dlls, dqs_dll, ddr_cfg2_reg;
> + u32 dqs_dly_tmp, dqs_dly, test_dqs, shift;
> + u32 rem, mask;
> + int i;
> +
> + /* Disable Self-refresh */
> + clrbits_32(memc + MEMCTL_DDR_SELF_REFRESH_REG, SR_AUTO_EN);
> +
> + /* Save DDR_CFG2 and modify its DQS gating window */
> + ddr_cfg2_reg = readl(memc + MEMCTL_DDR_CFG2_REG);
> + mask = DQS0_GATING_WINDOW_M;
> + if (bw == IND_SDRAM_WIDTH_16BIT)
> + mask |= DQS1_GATING_WINDOW_M;
> + clrbits_32(memc + MEMCTL_DDR_CFG2_REG, mask);
> +
> + /* Get minimum available DQS value */
> + dlls = readl(memc + MEMCTL_DLL_DBG_REG);
> + dlls = (dlls & MST_DLY_SEL_M) >> MST_DLY_SEL_S;
> +
> + dqs_dll = dlls >> 4;
> + if (dqs_dll <= 8)
> + dqs_coarse_min_limit = 8 - dqs_dll;
> + else
> + dqs_coarse_min_limit = 0;
> +
> + dqs_dll = dlls & 0xf;
> + if (dqs_dll <= 8)
> + dqs_fine_min_limit = 8 - dqs_dll;
> + else
> + dqs_fine_min_limit = 0;
> +
> + /* Initial DQS register value */
> + dqs_dly = INIT_DQS_VAL;
> +
> + /* Calibrate DQS0 and/or DQS1 */
> + for (i = 0; i < bw; i++) {
> + shift = i * 8;
> + dqs_dly &= ~(0xff << shift);
> +
> + /* Find maximum DQS coarse-grain */
> + dqs_dly_tmp = dqs_dly | (0xf << shift);
> + dqs_coarse_max = dqs_find_max(memc, memsize, COARSE_MAX_START,
> + 0xf, 4 + shift, dqs_dly_tmp);
> +
> + /* Find maximum DQS fine-grain */
> + dqs_dly_tmp = dqs_dly | (dqs_coarse_max << (4 + shift));
> + test_dqs = dqs_find_max(memc, memsize, FINE_MAX_START, 0xf,
> + shift, dqs_dly_tmp);
> +
> + if (test_dqs == FINE_MAX_START) {
> + dqs_coarse_max--;
> + dqs_fine_max = 0xf;
> + } else {
> + dqs_fine_max = test_dqs - 1;
> + }
> +
> + /* Find minimum DQS coarse-grain */
> + dqs_dly_tmp = dqs_dly;
> + dqs_coarse_min = dqs_find_min(memc, memsize, COARSE_MIN_START,
> + dqs_coarse_min_limit, 4 + shift,
> + dqs_dly_tmp);
> +
> + /* Find minimum DQS fine-grain */
> + dqs_dly_tmp = dqs_dly | (dqs_coarse_min << (4 + shift));
> + test_dqs = dqs_find_min(memc, memsize, FINE_MIN_START,
> + dqs_fine_min_limit, shift, dqs_dly_tmp);
> +
> + if (test_dqs == FINE_MIN_START + 1) {
> + dqs_coarse_min++;
> + dqs_fine_min = 0;
> + } else {
> + dqs_fine_min = test_dqs;
> + }
> +
> + /* Calculate central DQS coarse/fine value */
> + dqs_coarse_val = (dqs_coarse_max + dqs_coarse_min) >> 1;
> + rem = (dqs_coarse_max + dqs_coarse_min) % 2;
> +
> + dqs_fine_val = (rem * 4) + ((dqs_fine_max + dqs_fine_min) >> 1);
> + if (dqs_fine_val >= 0x10) {
> + dqs_coarse_val++;
> + dqs_fine_val -= 8;
> + }
> +
> + /* Save current DQS value */
> + dqs_dly |= ((dqs_coarse_val << 4) | dqs_fine_val) << shift;
> + }
> +
> + /* Set final DQS value */
> + writel(dqs_dly, memc + MEMCTL_DDR_DQS_DLY_REG);
> +
> + /* Restore DDR_CFG2 */
> + writel(ddr_cfg2_reg, memc + MEMCTL_DDR_CFG2_REG);
> +
> + /* Enable Self-refresh */
> + setbits_32(memc + MEMCTL_DDR_SELF_REFRESH_REG, SR_AUTO_EN);
> +}
> diff --git a/arch/mips/mach-mtmips/ddr_calibrate.c b/arch/mips/mach-mtmips/ddr_calibrate.c
> deleted file mode 100644
> index 3cd440804d..0000000000
> --- a/arch/mips/mach-mtmips/ddr_calibrate.c
> +++ /dev/null
> @@ -1,309 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0+
> -/*
> - * Copyright (C) 2018 Stefan Roese <sr at 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.
> - *
> - * Most functions in this file are copied from the MediaTek U-Boot
> - * repository. Without any documentation, it was impossible to really
> - * implement this differently. So its mostly a cleaned-up version of
> - * the original code, with only support for the MT7628 / MT7688 SoC.
> - */
> -
> -#include <common.h>
> -#include <cpu_func.h>
> -#include <linux/io.h>
> -#include <asm/cacheops.h>
> -#include <asm/io.h>
> -#include "mt76xx.h"
> -
> -#define NUM_OF_CACHELINE 128
> -#define MIN_START 6
> -#define MIN_FINE_START 0xf
> -#define MAX_START 7
> -#define MAX_FINE_START 0x0
> -
> -#define CPU_FRAC_DIV 1
> -
> -#if defined(CONFIG_ONBOARD_DDR2_SIZE_256MBIT)
> -#define DRAM_BUTTOM 0x02000000
> -#endif
> -#if defined(CONFIG_ONBOARD_DDR2_SIZE_512MBIT)
> -#define DRAM_BUTTOM 0x04000000
> -#endif
> -#if defined(CONFIG_ONBOARD_DDR2_SIZE_1024MBIT)
> -#define DRAM_BUTTOM 0x08000000
> -#endif
> -#if defined(CONFIG_ONBOARD_DDR2_SIZE_2048MBIT)
> -#define DRAM_BUTTOM 0x10000000
> -#endif
> -
> -static inline void cal_memcpy(void *src, void *dst, u32 size)
> -{
> - u8 *psrc = (u8 *)src;
> - u8 *pdst = (u8 *)dst;
> - int i;
> -
> - for (i = 0; i < size; i++, psrc++, pdst++)
> - *pdst = *psrc;
> -}
> -
> -static inline void cal_memset(void *src, u8 pat, u32 size)
> -{
> - u8 *psrc = (u8 *)src;
> - int i;
> -
> - for (i = 0; i < size; i++, psrc++)
> - *psrc = pat;
> -}
> -
> -#define pref_op(hint, addr) \
> - __asm__ __volatile__( \
> - ".set push\n" \
> - ".set noreorder\n" \
> - "pref %0, %1\n" \
> - ".set pop\n" \
> - : \
> - : "i" (hint), "R" (*(u8 *)(addr)))
> -
> -static inline void cal_patgen(u32 start_addr, u32 size, u32 bias)
> -{
> - u32 *addr = (u32 *)start_addr;
> - int i;
> -
> - for (i = 0; i < size; i++)
> - addr[i] = start_addr + i + bias;
> -}
> -
> -static inline int test_loop(int k, int dqs, u32 test_dqs, u32 *coarse_dqs,
> - u32 offs, u32 pat, u32 val)
> -{
> - u32 nc_addr;
> - u32 *c_addr;
> - int i;
> -
> - for (nc_addr = 0xa0000000;
> - nc_addr < (0xa0000000 + DRAM_BUTTOM - NUM_OF_CACHELINE * 32);
> - nc_addr += (DRAM_BUTTOM >> 6) + offs) {
> - writel(0x00007474, (void *)MT76XX_MEMCTRL_BASE + 0x64);
> - wmb(); /* Make sure store if finished */
> -
> - c_addr = (u32 *)(nc_addr & 0xdfffffff);
> - cal_memset(((u8 *)c_addr), 0x1F, NUM_OF_CACHELINE * 32);
> - cal_patgen(nc_addr, NUM_OF_CACHELINE * 8, pat);
> -
> - if (dqs > 0)
> - writel(0x00000074 |
> - (((k == 1) ? coarse_dqs[dqs] : test_dqs) << 12) |
> - (((k == 0) ? val : test_dqs) << 8),
> - (void *)MT76XX_MEMCTRL_BASE + 0x64);
> - else
> - writel(0x00007400 |
> - (((k == 1) ? coarse_dqs[dqs] : test_dqs) << 4) |
> - (((k == 0) ? val : test_dqs) << 0),
> - (void *)MT76XX_MEMCTRL_BASE + 0x64);
> - wmb(); /* Make sure store if finished */
> -
> - invalidate_dcache_range((u32)c_addr,
> - (u32)c_addr +
> - NUM_OF_CACHELINE * 32);
> - wmb(); /* Make sure store if finished */
> -
> - for (i = 0; i < NUM_OF_CACHELINE * 8; i++) {
> - if (i % 8 == 0)
> - pref_op(0, &c_addr[i]);
> - }
> -
> - for (i = 0; i < NUM_OF_CACHELINE * 8; i++) {
> - if (c_addr[i] != nc_addr + i + pat)
> - return -1;
> - }
> - }
> -
> - return 0;
> -}
> -
> -void ddr_calibrate(void)
> -{
> - u32 min_coarse_dqs[2];
> - u32 max_coarse_dqs[2];
> - u32 min_fine_dqs[2];
> - u32 max_fine_dqs[2];
> - u32 coarse_dqs[2];
> - u32 fine_dqs[2];
> - int reg = 0, ddr_cfg2_reg;
> - int flag;
> - int i, k;
> - int dqs = 0;
> - u32 min_coarse_dqs_bnd, min_fine_dqs_bnd, coarse_dqs_dll, fine_dqs_dll;
> - u32 val;
> - u32 fdiv = 0, frac = 0;
> -
> - /* Setup clock to run at full speed */
> - val = readl((void *)MT76XX_DYN_CFG0_REG);
> - fdiv = (u32)((val >> 8) & 0x0F);
> - if (CPU_FRAC_DIV < 1 || CPU_FRAC_DIV > 10)
> - frac = val & 0x0f;
> - else
> - frac = CPU_FRAC_DIV;
> -
> - while (frac < fdiv) {
> - val = readl((void *)MT76XX_DYN_CFG0_REG);
> - fdiv = (val >> 8) & 0x0f;
> - fdiv--;
> - val &= ~(0x0f << 8);
> - val |= (fdiv << 8);
> - writel(val, (void *)MT76XX_DYN_CFG0_REG);
> - udelay(500);
> - val = readl((void *)MT76XX_DYN_CFG0_REG);
> - fdiv = (val >> 8) & 0x0f;
> - }
> -
> - clrbits_le32((void *)MT76XX_MEMCTRL_BASE + 0x10, BIT(4));
> - ddr_cfg2_reg = readl((void *)MT76XX_MEMCTRL_BASE + 0x48);
> - clrbits_le32((void *)MT76XX_MEMCTRL_BASE + 0x48,
> - (0x3 << 28) | (0x3 << 26));
> -
> - min_coarse_dqs[0] = MIN_START;
> - min_coarse_dqs[1] = MIN_START;
> - min_fine_dqs[0] = MIN_FINE_START;
> - min_fine_dqs[1] = MIN_FINE_START;
> - max_coarse_dqs[0] = MAX_START;
> - max_coarse_dqs[1] = MAX_START;
> - max_fine_dqs[0] = MAX_FINE_START;
> - max_fine_dqs[1] = MAX_FINE_START;
> - dqs = 0;
> -
> - /* Add by KP, DQS MIN boundary */
> - reg = readl((void *)MT76XX_MEMCTRL_BASE + 0x20);
> - coarse_dqs_dll = (reg & 0xf00) >> 8;
> - fine_dqs_dll = (reg & 0xf0) >> 4;
> - if (coarse_dqs_dll <= 8)
> - min_coarse_dqs_bnd = 8 - coarse_dqs_dll;
> - else
> - min_coarse_dqs_bnd = 0;
> -
> - if (fine_dqs_dll <= 8)
> - min_fine_dqs_bnd = 8 - fine_dqs_dll;
> - else
> - min_fine_dqs_bnd = 0;
> - /* DQS MIN boundary */
> -
> -DQS_CAL:
> -
> - for (k = 0; k < 2; k++) {
> - u32 test_dqs;
> -
> - if (k == 0)
> - test_dqs = MAX_START;
> - else
> - test_dqs = MAX_FINE_START;
> -
> - do {
> - flag = test_loop(k, dqs, test_dqs, max_coarse_dqs,
> - 0x400, 0x3, 0xf);
> - if (flag == -1)
> - break;
> -
> - test_dqs++;
> - } while (test_dqs <= 0xf);
> -
> - if (k == 0) {
> - max_coarse_dqs[dqs] = test_dqs;
> - } else {
> - test_dqs--;
> -
> - if (test_dqs == MAX_FINE_START - 1) {
> - max_coarse_dqs[dqs]--;
> - max_fine_dqs[dqs] = 0xf;
> - } else {
> - max_fine_dqs[dqs] = test_dqs;
> - }
> - }
> - }
> -
> - for (k = 0; k < 2; k++) {
> - u32 test_dqs;
> -
> - if (k == 0)
> - test_dqs = MIN_START;
> - else
> - test_dqs = MIN_FINE_START;
> -
> - do {
> - flag = test_loop(k, dqs, test_dqs, min_coarse_dqs,
> - 0x480, 0x1, 0x0);
> - if (k == 0) {
> - if (flag == -1 ||
> - test_dqs == min_coarse_dqs_bnd)
> - break;
> -
> - test_dqs--;
> -
> - if (test_dqs < min_coarse_dqs_bnd)
> - break;
> - } else {
> - if (flag == -1) {
> - test_dqs++;
> - break;
> - } else if (test_dqs == min_fine_dqs_bnd) {
> - break;
> - }
> -
> - test_dqs--;
> -
> - if (test_dqs < min_fine_dqs_bnd)
> - break;
> - }
> - } while (test_dqs >= 0);
> -
> - if (k == 0) {
> - min_coarse_dqs[dqs] = test_dqs;
> - } else {
> - if (test_dqs == MIN_FINE_START + 1) {
> - min_coarse_dqs[dqs]++;
> - min_fine_dqs[dqs] = 0x0;
> - } else {
> - min_fine_dqs[dqs] = test_dqs;
> - }
> - }
> - }
> -
> - if (dqs == 0) {
> - dqs = 1;
> - goto DQS_CAL;
> - }
> -
> - for (i = 0; i < 2; i++) {
> - u32 temp;
> -
> - coarse_dqs[i] = (max_coarse_dqs[i] + min_coarse_dqs[i]) >> 1;
> - temp =
> - (((max_coarse_dqs[i] + min_coarse_dqs[i]) % 2) * 4) +
> - ((max_fine_dqs[i] + min_fine_dqs[i]) >> 1);
> - if (temp >= 0x10) {
> - coarse_dqs[i]++;
> - fine_dqs[i] = (temp - 0x10) + 0x8;
> - } else {
> - fine_dqs[i] = temp;
> - }
> - }
> - reg = (coarse_dqs[1] << 12) | (fine_dqs[1] << 8) |
> - (coarse_dqs[0] << 4) | fine_dqs[0];
> -
> - clrbits_le32((void *)MT76XX_MEMCTRL_BASE + 0x10, BIT(4));
> - writel(reg, (void *)MT76XX_MEMCTRL_BASE + 0x64);
> - writel(ddr_cfg2_reg, (void *)MT76XX_MEMCTRL_BASE + 0x48);
> - setbits_le32((void *)MT76XX_MEMCTRL_BASE + 0x10, BIT(4));
> -
> - for (i = 0; i < 2; i++)
> - debug("[%02X%02X%02X%02X]", min_coarse_dqs[i],
> - min_fine_dqs[i], max_coarse_dqs[i], max_fine_dqs[i]);
> - debug("\nDDR Calibration DQS reg = %08X\n", reg);
> -}
> diff --git a/arch/mips/mach-mtmips/ddr_init.c b/arch/mips/mach-mtmips/ddr_init.c
> new file mode 100644
> index 0000000000..cd355cc840
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/ddr_init.c
> @@ -0,0 +1,194 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + *
> + * Author: Weijie Gao <weijie.gao at mediatek.com>
> + */
> +
> +#include <common.h>
> +#include <linux/bitops.h>
> +#include <linux/io.h>
> +#include <linux/sizes.h>
> +#include <mach/ddr.h>
> +#include <mach/mc.h>
> +
> +#define DDR_BW_TEST_PAT 0xaa5555aa
> +
> +static const u32 dram_size[] = {
> + [DRAM_8MB] = SZ_8M,
> + [DRAM_16MB] = SZ_16M,
> + [DRAM_32MB] = SZ_32M,
> + [DRAM_64MB] = SZ_64M,
> + [DRAM_128MB] = SZ_128M,
> + [DRAM_256MB] = SZ_256M,
> +};
> +
> +static void dram_test_write(u32 addr, u32 val)
> +{
> + volatile ulong *target = (volatile ulong *)(KSEG1 + addr);
> +
> + sync();
> + *target = val;
> + sync();
> +}
> +
> +static u32 dram_test_read(u32 addr)
> +{
> + volatile ulong *target = (volatile ulong *)(KSEG1 + addr);
> + u32 val;
> +
> + sync();
> + val = *target;
> + sync();
> +
> + return val;
> +}
> +
> +static int dram_addr_test_bit(u32 bit)
> +{
> + u32 val;
> +
> + dram_test_write(0, 0);
> + dram_test_write(BIT(bit), DDR_BW_TEST_PAT);
> + val = dram_test_read(0);
> +
> + if (val == DDR_BW_TEST_PAT)
> + return 1;
> +
> + return 0;
> +}
> +
> +static void mc_ddr_init(void __iomem *memc, const struct mc_ddr_cfg *cfg,
> + u32 dq_dly, u32 dqs_dly, mc_reset_t mc_reset, u32 bw)
> +{
> + u32 val;
> +
> + mc_reset(1);
> + __udelay(200);
> + mc_reset(0);
> +
> + clrbits_32(memc + MEMCTL_SDRAM_CFG1_REG, RBC_MAPPING);
> +
> + writel(cfg->cfg2, memc + MEMCTL_DDR_CFG2_REG);
> + writel(cfg->cfg3, memc + MEMCTL_DDR_CFG3_REG);
> + writel(cfg->cfg4, memc + MEMCTL_DDR_CFG4_REG);
> + writel(dq_dly, memc + MEMCTL_DDR_DQ_DLY_REG);
> + writel(dqs_dly, memc + MEMCTL_DDR_DQS_DLY_REG);
> +
> + writel(cfg->cfg0, memc + MEMCTL_DDR_CFG0_REG);
> +
> + val = cfg->cfg1;
> + if (bw) {
> + val &= ~IND_SDRAM_WIDTH_M;
> + val |= (bw << IND_SDRAM_WIDTH_S) & IND_SDRAM_WIDTH_M;
> + }
> +
> + writel(val, memc + MEMCTL_DDR_CFG1_REG);
> +
> + clrsetbits_32(memc + MEMCTL_PWR_SAVE_CNT_REG, SR_TAR_CNT_M,
> + 1 << SR_TAR_CNT_S);
> +
> + setbits_32(memc + MEMCTL_DDR_SELF_REFRESH_REG, SR_AUTO_EN);
> +}
> +
> +void ddr1_init(struct mc_ddr_init_param *param)
> +{
> + enum mc_dram_size sz;
> + u32 bw = 0;
> +
> + /* First initialization, determine bus width */
> + mc_ddr_init(param->memc, ¶m->cfgs[DRAM_8MB], param->dq_dly,
> + param->dqs_dly, param->mc_reset, IND_SDRAM_WIDTH_16BIT);
> +
> + /* Test bus width */
> + dram_test_write(0, DDR_BW_TEST_PAT);
> + if (dram_test_read(0) == DDR_BW_TEST_PAT)
> + bw = IND_SDRAM_WIDTH_16BIT;
> + else
> + bw = IND_SDRAM_WIDTH_8BIT;
> +
> + /* Second initialization, determine DDR capacity */
> + mc_ddr_init(param->memc, ¶m->cfgs[DRAM_128MB], param->dq_dly,
> + param->dqs_dly, param->mc_reset, bw);
> +
> + if (dram_addr_test_bit(9)) {
> + sz = DRAM_8MB;
> + } else {
> + if (dram_addr_test_bit(10)) {
> + if (dram_addr_test_bit(23))
> + sz = DRAM_16MB;
> + else
> + sz = DRAM_32MB;
> + } else {
> + if (dram_addr_test_bit(24))
> + sz = DRAM_64MB;
> + else
> + sz = DRAM_128MB;
> + }
> + }
> +
> + /* Final initialization, with DDR calibration */
> + mc_ddr_init(param->memc, ¶m->cfgs[sz], param->dq_dly,
> + param->dqs_dly, param->mc_reset, bw);
> +
> + /* Return actual DDR configuration */
> + param->memsize = dram_size[sz];
> + param->bus_width = bw;
> +}
> +
> +void ddr2_init(struct mc_ddr_init_param *param)
> +{
> + enum mc_dram_size sz;
> + u32 bw = 0;
> +
> + /* First initialization, determine bus width */
> + mc_ddr_init(param->memc, ¶m->cfgs[DRAM_32MB], param->dq_dly,
> + param->dqs_dly, param->mc_reset, IND_SDRAM_WIDTH_16BIT);
> +
> + /* Test bus width */
> + dram_test_write(0, DDR_BW_TEST_PAT);
> + if (dram_test_read(0) == DDR_BW_TEST_PAT)
> + bw = IND_SDRAM_WIDTH_16BIT;
> + else
> + bw = IND_SDRAM_WIDTH_8BIT;
> +
> + /* Second initialization, determine DDR capacity */
> + mc_ddr_init(param->memc, ¶m->cfgs[DRAM_256MB], param->dq_dly,
> + param->dqs_dly, param->mc_reset, bw);
> +
> + if (bw == IND_SDRAM_WIDTH_16BIT) {
> + if (dram_addr_test_bit(10)) {
> + sz = DRAM_32MB;
> + } else {
> + if (dram_addr_test_bit(24)) {
> + if (dram_addr_test_bit(27))
> + sz = DRAM_64MB;
> + else
> + sz = DRAM_128MB;
> + } else {
> + sz = DRAM_256MB;
> + }
> + }
> + } else {
> + if (dram_addr_test_bit(23)) {
> + sz = DRAM_32MB;
> + } else {
> + if (dram_addr_test_bit(24)) {
> + if (dram_addr_test_bit(27))
> + sz = DRAM_64MB;
> + else
> + sz = DRAM_128MB;
> + } else {
> + sz = DRAM_256MB;
> + }
> + }
> + }
> +
> + /* Final initialization, with DDR calibration */
> + mc_ddr_init(param->memc, ¶m->cfgs[sz], param->dq_dly,
> + param->dqs_dly, param->mc_reset, bw);
> +
> + /* Return actual DDR configuration */
> + param->memsize = dram_size[sz];
> + param->bus_width = bw;
> +}
> diff --git a/arch/mips/mach-mtmips/include/mach/ddr.h b/arch/mips/mach-mtmips/include/mach/ddr.h
> new file mode 100644
> index 0000000000..f92198137b
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/include/mach/ddr.h
> @@ -0,0 +1,52 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + *
> + * Author: Weijie Gao <weijie.gao at mediatek.com>
> + */
> +
> +#ifndef _MTMIPS_DDR_H_
> +#define _MTMIPS_DDR_H_
> +
> +#include <linux/io.h>
> +#include <linux/types.h>
> +
> +enum mc_dram_size {
> + DRAM_8MB,
> + DRAM_16MB,
> + DRAM_32MB,
> + DRAM_64MB,
> + DRAM_128MB,
> + DRAM_256MB,
> +
> + __DRAM_SZ_MAX
> +};
> +
> +struct mc_ddr_cfg {
> + u32 cfg0;
> + u32 cfg1;
> + u32 cfg2;
> + u32 cfg3;
> + u32 cfg4;
> +};
> +
> +typedef void (*mc_reset_t)(int assert);
> +
> +struct mc_ddr_init_param {
> + void __iomem *memc;
> +
> + u32 dq_dly;
> + u32 dqs_dly;
> +
> + const struct mc_ddr_cfg *cfgs;
> + mc_reset_t mc_reset;
> +
> + u32 memsize;
> + u32 bus_width;
> +};
> +
> +void ddr1_init(struct mc_ddr_init_param *param);
> +void ddr2_init(struct mc_ddr_init_param *param);
> +void ddr_calibrate(void __iomem *memc, u32 memsize, u32 bw);
> +
> +#endif /* _MTMIPS_DDR_H_ */
> diff --git a/arch/mips/mach-mtmips/include/mach/mc.h b/arch/mips/mach-mtmips/include/mach/mc.h
> new file mode 100644
> index 0000000000..d7d623a63b
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/include/mach/mc.h
> @@ -0,0 +1,180 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + *
> + * Author: Weijie Gao <weijie.gao at mediatek.com>
> + */
> +
> +#ifndef _MTMIPS_MC_H_
> +#define _MTMIPS_MC_H_
> +
> +#define MEMCTL_SDRAM_CFG0_REG 0x00
> +#define DIS_CLK_GT 0x80000000
> +#define CLK_SLEW_S 29
> +#define CLK_SLEW_M 0x60000000
> +#define TWR 0x10000000
> +#define TMRD_S 24
> +#define TMRD_M 0xf000000
> +#define TRFC_S 20
> +#define TRFC_M 0xf00000
> +#define TCAS_S 16
> +#define TCAS_M 0x30000
> +#define TRAS_S 12
> +#define TRAS_M 0xf000
> +#define TRCD_S 8
> +#define TRCD_M 0x300
> +#define TRC_S 4
> +#define TRC_M 0xf0
> +#define TRP_S 0
> +#define TRP_M 0x03
> +
> +#define MEMCTL_SDRAM_CFG1_REG 0x04
> +#define SDRAM_INIT_START 0x80000000
> +#define SDRAM_INIT_DONE 0x40000000
> +#define RBC_MAPPING 0x20000000
> +#define PWR_DOWN_EN 0x10000000
> +#define PWR_DOWN_MODE 0x8000000
> +#define SDRAM_WIDTH 0x1000000
> +#define NUMCOLS_S 20
> +#define NUMCOLS_M 0x300000
> +#define NUMROWS_S 16
> +#define NUMROWS_M 0x30000
> +#define TREFR_S 0
> +#define TREFR_M 0xffff
> +
> +#define MEMCTL_DDR_SELF_REFRESH_REG 0x10
> +#define ODT_SRC_SEL_S 24
> +#define ODT_SRC_SEL_M 0xf000000
> +#define ODT_OFF_DLY_S 20
> +#define ODT_OFF_DLY_M 0xf00000
> +#define ODT_ON_DLY_S 16
> +#define ODT_ON_DLY_M 0xf0000
> +#define SR_AUTO_EN 0x10
> +#define SRACK_B 0x02
> +#define SRREQ_B 0x01
> +
> +#define MEMCTL_PWR_SAVE_CNT_REG 0x14
> +#define PD_CNT_S 24
> +#define PD_CNT_M 0xff000000
> +#define SR_TAR_CNT_S 0
> +#define SR_TAR_CNT_M 0xffffff
> +
> +#define MEMCTL_DLL_DBG_REG 0x20
> +#define TDC_STABLE_S 12
> +#define TDC_STABLE_M 0x3f000
> +#define MST_DLY_SEL_S 4
> +#define MST_DLY_SEL_M 0xff0
> +#define CURR_STATE_S 1
> +#define CURR_STATE_M 0x06
> +#define ADLL_LOCK_DONE 0x01
> +
> +#define MEMCTL_DDR_CFG0_REG 0x40
> +#define T_RRD_S 28
> +#define T_RRD_M 0xf0000000
> +#define T_RAS_S 23
> +#define T_RAS_M 0xf800000
> +#define T_RP_S 19
> +#define T_RP_M 0x780000
> +#define T_RFC_S 13
> +#define T_RFC_M 0x7e000
> +#define T_REFI_S 0
> +#define T_REFI_M 0x1fff
> +
> +#define MEMCTL_DDR_CFG1_REG 0x44
> +#define T_WTR_S 28
> +#define T_WTR_M 0xf0000000
> +#define T_RTP_S 24
> +#define T_RTP_M 0xf000000
> +#define USER_DATA_WIDTH 0x200000
> +#define IND_SDRAM_SIZE_S 18
> +#define IND_SDRAM_SIZE_M 0x1c0000
> +#define IND_SDRAM_SIZE_8MB 1
> +#define IND_SDRAM_SIZE_16MB 2
> +#define IND_SDRAM_SIZE_32MB 3
> +#define IND_SDRAM_SIZE_64MB 4
> +#define IND_SDRAM_SIZE_128MB 5
> +#define IND_SDRAM_SIZE_256MB 6
> +#define IND_SDRAM_WIDTH_S 16
> +#define IND_SDRAM_WIDTH_M 0x30000
> +#define IND_SDRAM_WIDTH_8BIT 1
> +#define IND_SDRAM_WIDTH_16BIT 2
> +#define EXT_BANK_S 14
> +#define EXT_BANK_M 0xc000
> +#define TOTAL_SDRAM_WIDTH_S 12
> +#define TOTAL_SDRAM_WIDTH_M 0x3000
> +#define T_WR_S 8
> +#define T_WR_M 0xf00
> +#define T_MRD_S 4
> +#define T_MRD_M 0xf0
> +#define T_RCD_S 0
> +#define T_RCD_M 0x0f
> +
> +#define MEMCTL_DDR_CFG2_REG 0x48
> +#define REGE 0x80000000
> +#define DDR2_MODE 0x40000000
> +#define DQS0_GATING_WINDOW_S 28
> +#define DQS0_GATING_WINDOW_M 0x30000000
> +#define DQS1_GATING_WINDOW_S 26
> +#define DQS1_GATING_WINDOW_M 0xc000000
> +#define PD 0x1000
> +#define WR_S 9
> +#define WR_M 0xe00
> +#define DLLRESET 0x100
> +#define TESTMODE 0x80
> +#define CAS_LATENCY_S 4
> +#define CAS_LATENCY_M 0x70
> +#define BURST_TYPE 0x08
> +#define BURST_LENGTH_S 0
> +#define BURST_LENGTH_M 0x07
> +
> +#define MEMCTL_DDR_CFG3_REG 0x4c
> +#define Q_OFF 0x1000
> +#define RDOS 0x800
> +#define DIS_DIFF_DQS 0x400
> +#define OCD_S 7
> +#define OCD_M 0x380
> +#define RTT1 0x40
> +#define ADDITIVE_LATENCY_S 3
> +#define ADDITIVE_LATENCY_M 0x38
> +#define RTT0 0x04
> +#define DS 0x02
> +#define DLL 0x01
> +
> +#define MEMCTL_DDR_CFG4_REG 0x50
> +#define FAW_S 0
> +#define FAW_M 0x0f
> +
> +#define MEMCTL_DDR_DQ_DLY_REG 0x60
> +#define DQ1_DELAY_SEL_S 24
> +#define DQ1_DELAY_SEL_M 0xff000000
> +#define DQ0_DELAY_SEL_S 16
> +#define DQ0_DELAY_SEL_M 0xff0000
> +#define DQ1_DELAY_COARSE_TUNING_S 12
> +#define DQ1_DELAY_COARSE_TUNING_M 0xf000
> +#define DQ1_DELAY_FINE_TUNING_S 8
> +#define DQ1_DELAY_FINE_TUNING_M 0xf00
> +#define DQ0_DELAY_COARSE_TUNING_S 4
> +#define DQ0_DELAY_COARSE_TUNING_M 0xf0
> +#define DQ0_DELAY_FINE_TUNING_S 0
> +#define DQ0_DELAY_FINE_TUNING_M 0x0f
> +
> +#define MEMCTL_DDR_DQS_DLY_REG 0x64
> +#define DQS1_DELAY_SEL_S 24
> +#define DQS1_DELAY_SEL_M 0xff000000
> +#define DQS0_DELAY_SEL_S 16
> +#define DQS0_DELAY_SEL_M 0xff0000
> +#define DQS1_DELAY_COARSE_TUNING_S 12
> +#define DQS1_DELAY_COARSE_TUNING_M 0xf000
> +#define DQS1_DELAY_FINE_TUNING_S 8
> +#define DQS1_DELAY_FINE_TUNING_M 0xf00
> +#define DQS0_DELAY_COARSE_TUNING_S 4
> +#define DQS0_DELAY_COARSE_TUNING_M 0xf0
> +#define DQS0_DELAY_FINE_TUNING_S 0
> +#define DQS0_DELAY_FINE_TUNING_M 0x0f
> +
> +#define MEMCTL_DDR_DLL_SLV_REG 0x68
> +#define DLL_SLV_UPDATE_MODE 0x100
> +#define DQS_DLY_SEL_EN 0x80
> +#define DQ_DLY_SEL_EN 0x01
> +
> +#endif /* _MTMIPS_MC_H_ */
> diff --git a/arch/mips/mach-mtmips/lowlevel_init.S b/arch/mips/mach-mtmips/lowlevel_init.S
> deleted file mode 100644
> index aa707e0de6..0000000000
> --- a/arch/mips/mach-mtmips/lowlevel_init.S
> +++ /dev/null
> @@ -1,328 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0+ */
> -/*
> - * (c) 2018 Stefan Roese <sr at 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)
> diff --git a/arch/mips/mach-mtmips/mt7628/Makefile b/arch/mips/mach-mtmips/mt7628/Makefile
> new file mode 100644
> index 0000000000..db62e90d77
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/mt7628/Makefile
> @@ -0,0 +1,5 @@
> +# SPDX-License-Identifier: GPL-2.0
> +
> +obj-y += lowlevel_init.o
> +obj-y += init.o
> +obj-y += ddr.o
> diff --git a/arch/mips/mach-mtmips/mt7628/ddr.c b/arch/mips/mach-mtmips/mt7628/ddr.c
> new file mode 100644
> index 0000000000..861a675beb
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/mt7628/ddr.c
> @@ -0,0 +1,173 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + *
> + * Author: Weijie Gao <weijie.gao at mediatek.com>
> + */
> +
> +#include <common.h>
> +#include <asm/addrspace.h>
> +#include <linux/bitops.h>
> +#include <linux/sizes.h>
> +#include <linux/io.h>
> +#include <mach/ddr.h>
> +#include <mach/mc.h>
> +#include "mt7628.h"
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +/* DDR2 DQ_DLY */
> +#define DDR2_DQ_DLY \
> + ((0x8 << DQ1_DELAY_COARSE_TUNING_S) | \
> + (0x2 << DQ1_DELAY_FINE_TUNING_S) | \
> + (0x8 << DQ0_DELAY_COARSE_TUNING_S) | \
> + (0x2 << DQ0_DELAY_FINE_TUNING_S))
> +
> +/* DDR2 DQS_DLY */
> +#define DDR2_DQS_DLY \
> + ((0x8 << DQS1_DELAY_COARSE_TUNING_S) | \
> + (0x3 << DQS1_DELAY_FINE_TUNING_S) | \
> + (0x8 << DQS0_DELAY_COARSE_TUNING_S) | \
> + (0x3 << DQS0_DELAY_FINE_TUNING_S))
> +
> +const struct mc_ddr_cfg ddr1_cfgs_200mhz[] = {
> + [DRAM_8MB] = { 0x34A1EB94, 0x20262324, 0x28000033, 0x00000002, 0x00000000 },
> + [DRAM_16MB] = { 0x34A1EB94, 0x202A2324, 0x28000033, 0x00000002, 0x00000000 },
> + [DRAM_32MB] = { 0x34A1E5CA, 0x202E2324, 0x28000033, 0x00000002, 0x00000000 },
> + [DRAM_64MB] = { 0x3421E5CA, 0x20322324, 0x28000033, 0x00000002, 0x00000000 },
> + [DRAM_128MB] = { 0x241B05CA, 0x20362334, 0x28000033, 0x00000002, 0x00000000 },
> +};
> +
> +const struct mc_ddr_cfg ddr1_cfgs_160mhz[] = {
> + [DRAM_8MB] = { 0x239964A1, 0x20262323, 0x00000033, 0x00000002, 0x00000000 },
> + [DRAM_16MB] = { 0x239964A1, 0x202A2323, 0x00000033, 0x00000002, 0x00000000 },
> + [DRAM_32MB] = { 0x239964A1, 0x202E2323, 0x00000033, 0x00000002, 0x00000000 },
> + [DRAM_64MB] = { 0x239984A1, 0x20322323, 0x00000033, 0x00000002, 0x00000000 },
> + [DRAM_128MB] = { 0x239AB4A1, 0x20362333, 0x00000033, 0x00000002, 0x00000000 },
> +};
> +
> +const struct mc_ddr_cfg ddr2_cfgs_200mhz[] = {
> + [DRAM_32MB] = { 0x2519E2E5, 0x222E2323, 0x68000C43, 0x00000452, 0x0000000A },
> + [DRAM_64MB] = { 0x249AA2E5, 0x22322323, 0x68000C43, 0x00000452, 0x0000000A },
> + [DRAM_128MB] = { 0x249B42E5, 0x22362323, 0x68000C43, 0x00000452, 0x0000000A },
> + [DRAM_256MB] = { 0x249CE2E5, 0x223A2323, 0x68000C43, 0x00000452, 0x0000000A },
> +};
> +
> +const struct mc_ddr_cfg ddr2_cfgs_160mhz[] = {
> + [DRAM_32MB] = { 0x23918250, 0x222E2322, 0x40000A43, 0x00000452, 0x00000006 },
> + [DRAM_64MB] = { 0x239A2250, 0x22322322, 0x40000A43, 0x00000452, 0x00000008 },
> + [DRAM_128MB] = { 0x2392A250, 0x22362322, 0x40000A43, 0x00000452, 0x00000008 },
> + [DRAM_256MB] = { 0x24140250, 0x223A2322, 0x40000A43, 0x00000452, 0x00000008 },
> +};
> +
> +static void mt7628_memc_reset(int assert)
> +{
> + void __iomem *sysc = ioremap_nocache(SYSCTL_BASE, SYSCTL_SIZE);
> +
> + if (assert)
> + setbits_32(sysc + SYSCTL_RSTCTL_REG, MC_RST);
> + else
> + clrbits_32(sysc + SYSCTL_RSTCTL_REG, MC_RST);
> +}
> +
> +static void mt7628_ddr_pad_ldo_config(int ddr_type, int pkg_type)
> +{
> + void __iomem *rgc = ioremap_nocache(RGCTL_BASE, RGCTL_SIZE);
> + u32 ck_pad1, cmd_pad1, dq_pad0, dq_pad1, dqs_pad0, dqs_pad1;
> +
> + setbits_32(rgc + RGCTL_PMU_G0_REG, PMU_CFG_EN);
> +
> + if (ddr_type == DRAM_DDR1)
> + setbits_32(rgc + RGCTL_PMU_G3_REG, RG_DDRLDO_VOSEL);
> + else
> + clrbits_32(rgc + RGCTL_PMU_G3_REG, RG_DDRLDO_VOSEL);
> +
> + setbits_32(rgc + RGCTL_PMU_G3_REG, NI_DDRLDO_EN);
> +
> + __udelay(250 * 50);
> +
> + setbits_32(rgc + RGCTL_PMU_G3_REG, NI_DDRLDO_STB);
> + setbits_32(rgc + RGCTL_PMU_G1_REG, RG_BUCK_FPWM);
> +
> + ck_pad1 = readl(rgc + RGCTL_DDR_PAD_CK_G1_REG);
> + cmd_pad1 = readl(rgc + RGCTL_DDR_PAD_CMD_G1_REG);
> + dq_pad0 = readl(rgc + RGCTL_DDR_PAD_DQ_G0_REG);
> + dq_pad1 = readl(rgc + RGCTL_DDR_PAD_DQ_G1_REG);
> + dqs_pad0 = readl(rgc + RGCTL_DDR_PAD_DQS_G0_REG);
> + dqs_pad1 = readl(rgc + RGCTL_DDR_PAD_DQS_G1_REG);
> +
> + ck_pad1 &= ~(DRVP_M | DRVN_M);
> + cmd_pad1 &= ~(DRVP_M | DRVN_M);
> + dq_pad0 &= ~RTT_M;
> + dq_pad1 &= ~(DRVP_M | DRVN_M);
> + dqs_pad0 &= ~RTT_M;
> + dqs_pad1 &= ~(DRVP_M | DRVN_M);
> +
> + if (pkg_type == PKG_ID_KN) {
> + ck_pad1 |= (3 << DRVP_S) | (3 << DRVN_S);
> + cmd_pad1 |= (3 << DRVP_S) | (3 << DRVN_S);
> + dq_pad1 |= (3 << DRVP_S) | (3 << DRVN_S);
> + dqs_pad1 |= (3 << DRVP_S) | (3 << DRVN_S);
> + } else {
> + ck_pad1 |= (12 << DRVP_S) | (12 << DRVN_S);
> + cmd_pad1 |= (2 << DRVP_S) | (2 << DRVN_S);
> + dqs_pad1 |= (12 << DRVP_S) | (12 << DRVN_S);
> + if (ddr_type == DRAM_DDR1)
> + dq_pad1 |= (7 << DRVP_S) | (7 << DRVN_S);
> + else
> + dq_pad1 |= (4 << DRVP_S) | (4 << DRVN_S);
> + }
> +
> + writel(ck_pad1, rgc + RGCTL_DDR_PAD_CK_G1_REG);
> + writel(cmd_pad1, rgc + RGCTL_DDR_PAD_CMD_G1_REG);
> + writel(dq_pad0, rgc + RGCTL_DDR_PAD_DQ_G0_REG);
> + writel(dq_pad1, rgc + RGCTL_DDR_PAD_DQ_G1_REG);
> + writel(dqs_pad0, rgc + RGCTL_DDR_PAD_DQS_G0_REG);
> + writel(dqs_pad1, rgc + RGCTL_DDR_PAD_DQS_G1_REG);
> +}
> +
> +void mt7628_ddr_init(void)
> +{
> + void __iomem *sysc;
> + int ddr_type, pkg_type, lspd;
> + struct mc_ddr_init_param param;
> +
> + sysc = ioremap_nocache(SYSCTL_BASE, SYSCTL_SIZE);
> + ddr_type = readl(sysc + SYSCTL_SYSCFG0_REG) & DRAM_TYPE;
> + pkg_type = !!(readl(sysc + SYSCTL_CHIP_REV_ID_REG) & PKG_ID);
> + lspd = readl(sysc + SYSCTL_CLKCFG0_REG) &
> + (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL);
> +
> + mt7628_memc_reset(1);
> + __udelay(200);
> +
> + mt7628_ddr_pad_ldo_config(ddr_type, pkg_type);
> +
> + param.memc = ioremap_nocache(MEMCTL_BASE, MEMCTL_SIZE);
> + param.dq_dly = DDR2_DQ_DLY;
> + param.dqs_dly = DDR2_DQS_DLY;
> + param.mc_reset = mt7628_memc_reset;
> + param.memsize = 0;
> + param.bus_width = 0;
> +
> + if (pkg_type == PKG_ID_KN)
> + ddr_type = DRAM_DDR1;
> +
> + if (ddr_type == DRAM_DDR1) {
> + if (lspd)
> + param.cfgs = ddr1_cfgs_160mhz;
> + else
> + param.cfgs = ddr1_cfgs_200mhz;
> + ddr1_init(¶m);
> + } else {
> + if (lspd)
> + param.cfgs = ddr2_cfgs_160mhz;
> + else
> + param.cfgs = ddr2_cfgs_200mhz;
> + ddr2_init(¶m);
> + }
> +
> + ddr_calibrate(param.memc, param.memsize, param.bus_width);
> +
> + gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, SZ_256M);
> +}
> diff --git a/arch/mips/mach-mtmips/mt7628/init.c b/arch/mips/mach-mtmips/mt7628/init.c
> new file mode 100644
> index 0000000000..77d1f2ea0d
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/mt7628/init.c
> @@ -0,0 +1,109 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + *
> + * Author: Weijie Gao <weijie.gao at mediatek.com>
> + */
> +
> +#include <common.h>
> +#include <clk.h>
> +#include <dm.h>
> +#include <dm/uclass.h>
> +#include <dt-bindings/clock/mt7628-clk.h>
> +#include <linux/io.h>
> +#include "mt7628.h"
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +static void set_init_timer_freq(void)
> +{
> + void __iomem *sysc;
> + u32 bs, val, timer_freq_post;
> +
> + sysc = ioremap_nocache(SYSCTL_BASE, SYSCTL_SIZE);
> +
> + /* We can't use the clk driver as the DM has not been initialized yet */
> + bs = readl(sysc + SYSCTL_SYSCFG0_REG);
> + if ((bs & XTAL_FREQ_SEL) == XTAL_25MHZ) {
> + gd->arch.timer_freq = 25000000;
> + timer_freq_post = 575000000;
> + } else {
> + gd->arch.timer_freq = 40000000;
> + timer_freq_post = 580000000;
> + }
> +
> + val = readl(sysc + SYSCTL_CLKCFG0_REG);
> + if (!(val & (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL)))
> + gd->arch.timer_freq = timer_freq_post;
> +}
> +
> +void mt7628_init(void)
> +{
> + set_init_timer_freq();
> +
> + mt7628_ddr_init();
> +}
> +
> +int print_cpuinfo(void)
> +{
> + void __iomem *sysc;
> + struct udevice *clkdev;
> + u32 val, ver, eco, pkg, ddr, chipmode, ee;
> + ulong cpu_clk, bus_clk, xtal_clk, timer_freq;
> + struct clk clk;
> + int ret;
> +
> + sysc = ioremap_nocache(SYSCTL_BASE, SYSCTL_SIZE);
> +
> + val = readl(sysc + SYSCTL_CHIP_REV_ID_REG);
> + ver = (val & VER_M) >> VER_S;
> + eco = (val & ECO_M) >> ECO_S;
> + pkg = !!(val & PKG_ID);
> +
> + val = readl(sysc + SYSCTL_SYSCFG0_REG);
> + ddr = val & DRAM_TYPE;
> + chipmode = (val & CHIP_MODE_M) >> CHIP_MODE_S;
> +
> + val = readl(sysc + SYSCTL_EFUSE_CFG_REG);
> + ee = val & EFUSE_MT7688;
> +
> + printf("CPU: MediaTek MT%u%c ver:%u eco:%u\n",
> + ee ? 7688 : 7628, pkg ? 'A' : 'K', ver, eco);
> +
> + printf("Boot: DDR%s, SPI-NOR %u-Byte Addr, CPU clock from %s\n",
> + ddr ? "" : "2", chipmode & 0x01 ? 4 : 3,
> + chipmode & 0x02 ? "XTAL" : "CPLL");
> +
> + ret = uclass_get_device_by_driver(UCLASS_CLK, DM_GET_DRIVER(mt7628_clk),
> + &clkdev);
> + if (ret)
> + return ret;
> +
> + clk.dev = clkdev;
> +
> + clk.id = CLK_CPU;
> + cpu_clk = clk_get_rate(&clk);
> +
> + clk.id = CLK_SYS;
> + bus_clk = clk_get_rate(&clk);
> +
> + clk.id = CLK_XTAL;
> + xtal_clk = clk_get_rate(&clk);
> +
> + clk.id = CLK_MIPS_CNT;
> + timer_freq = clk_get_rate(&clk);
> +
> + /* Set final timer frequency */
> + if (timer_freq)
> + gd->arch.timer_freq = timer_freq;
> +
> + printf("Clock: CPU: %luMHz, Bus: %luMHz, XTAL: %luMHz\n",
> + cpu_clk / 1000000, bus_clk / 1000000, xtal_clk / 1000000);
> +
> + return 0;
> +}
> +
> +ulong notrace get_tbclk(void)
> +{
> + return gd->arch.timer_freq;
> +}
> diff --git a/arch/mips/mach-mtmips/mt7628/lowlevel_init.S b/arch/mips/mach-mtmips/mt7628/lowlevel_init.S
> new file mode 100644
> index 0000000000..eeab2ca825
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/mt7628/lowlevel_init.S
> @@ -0,0 +1,155 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + *
> + * Author: Weijie Gao <weijie.gao at mediatek.com>
> + */
> +
> +#include <config.h>
> +#include <asm-offsets.h>
> +#include <asm/cacheops.h>
> +#include <asm/regdef.h>
> +#include <asm/mipsregs.h>
> +#include <asm/addrspace.h>
> +#include <asm/asm.h>
> +#include "mt7628.h"
> +
> +/* Set temporary stack address range */
> +#ifndef CONFIG_SYS_INIT_SP_ADDR
> +#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \
> + CONFIG_SYS_INIT_SP_OFFSET)
> +#endif
> +
> +#define CACHE_STACK_SIZE 0x4000
> +#define CACHE_STACK_BASE (CONFIG_SYS_INIT_SP_ADDR - CACHE_STACK_SIZE)
> +
> +#define DELAY_USEC(us) ((58 * (us)) / 3)
> +
> + .set noreorder
> +
> +LEAF(mips_sram_init)
> +#ifndef CONFIG_SKIP_LOWLEVEL_INIT
> + /* Setup CPU PLL */
> + li t0, DELAY_USEC(1000000)
> + li t1, KSEG1ADDR(SYSCTL_BASE + SYSCTL_ROM_STATUS_REG)
> + li t2, KSEG1ADDR(SYSCTL_BASE + SYSCTL_CLKCFG0_REG)
> +
> +_check_rom_status:
> + lw t3, 0(t1)
> + andi t3, t3, 1
> + bnez t3, _rom_normal
> + subu t0, t0, 1
> + bnez t0, _check_rom_status
> + nop
> +
> + lw t3, 0(t2)
> + ori t3, (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL)
> + xori t3, CPU_PLL_FROM_BBP
> + b _cpu_pll_done
> + nop
> +
> +_rom_normal:
> + lw t3, 0(t2)
> + ori t3, (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL | \
> + DIS_BBP_SLEEP | EN_BBP_CLK)
> + xori t3, (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL)
> +
> +_cpu_pll_done:
> + sw t3, 0(t2)
> +
> + li t2, KSEG1ADDR(RBUSCTL_BASE + RBUSCTL_DYN_CFG0_REG)
> + lw t3, 0(t2)
> + ori t3, t3, (CPU_FDIV_M | CPU_FFRAC_M)
> + xori t3, t3, (CPU_FDIV_M | CPU_FFRAC_M)
> + ori t3, t3, ((1 << CPU_FDIV_S) | (1 << CPU_FFRAC_S))
> + sw t3, 0(t2)
> +
> + /* Clear WST & SPR bits in ErrCtl */
> + mfc0 t0, CP0_ECC
> + ins t0, zero, 30, 2
> + mtc0 t0, CP0_ECC
> + ehb
> +
> + /* Simply initialize I-Cache */
> + li a0, 0
> + li a1, CONFIG_SYS_ICACHE_SIZE
> +
> + mtc0 zero, CP0_TAGLO /* Zero to DDataLo */
> +
> +1: cache INDEX_STORE_TAG_I, 0(a0)
> + addiu a0, CONFIG_SYS_ICACHE_LINE_SIZE
> + bne a0, a1, 1b
> + nop
> +
> + /* Simply initialize D-Cache */
> + li a0, 0
> + li a1, CONFIG_SYS_DCACHE_SIZE
> +
> + mtc0 zero, CP0_TAGLO, 2
> +
> +2: cache INDEX_STORE_TAG_D, 0(a0)
> + addiu a0, CONFIG_SYS_DCACHE_LINE_SIZE
> + bne a0, a1, 2b
> + nop
> +
> + /* Set KSEG0 Cachable */
> + mfc0 t0, CP0_CONFIG
> + and t0, t0, MIPS_CONF_IMPL
> + or t0, t0, CONF_CM_CACHABLE_NONCOHERENT
> + mtc0 t0, CP0_CONFIG
> + ehb
> +
> + /* Lock D-Cache */
> + PTR_LI a0, CACHE_STACK_BASE /* D-Cache lock base */
> + li a1, CACHE_STACK_SIZE /* D-Cache lock size */
> + li a2, 0x1ffff800 /* Mask of DTagLo[PTagLo] */
> +
> +3:
> + /* Lock one cacheline */
> + and t0, a0, a2
> + ori t0, 0xe0 /* Valid & Dirty & Lock bits */
> + mtc0 t0, CP0_TAGLO, 2 /* Write to DTagLo */
> + ehb
> + cache INDEX_STORE_TAG_D, 0(a0)
> +
> + addiu a0, CONFIG_SYS_DCACHE_LINE_SIZE
> + sub a1, CONFIG_SYS_DCACHE_LINE_SIZE
> + bnez a1, 3b
> + nop
> +#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
> +
> + jr ra
> + nop
> + END(mips_sram_init)
> +
> +NESTED(lowlevel_init, 0, ra)
> + /* Save ra and do real lowlevel initialization */
> + move s0, ra
> +
> + PTR_LA t9, mt7628_init
> + jalr t9
> + nop
> +
> + move ra, s0
> +
> + /* Write back data in locked cache to DRAM */
> + PTR_LI a0, CACHE_STACK_BASE /* D-Cache unlock base */
> + li a1, CACHE_STACK_SIZE /* D-Cache unlock size */
> +
> +1:
> + cache HIT_WRITEBACK_INV_D, 0(a0)
> + addiu a0, CONFIG_SYS_DCACHE_LINE_SIZE
> + sub a1, CONFIG_SYS_DCACHE_LINE_SIZE
> + bnez a1, 1b
> + nop
> +
> + /* Set KSEG0 Uncached */
> + mfc0 t0, CP0_CONFIG
> + and t0, t0, MIPS_CONF_IMPL
> + or t0, t0, CONF_CM_UNCACHED
> + mtc0 t0, CP0_CONFIG
> + ehb
> +
> + jr ra
> + nop
> + END(lowlevel_init)
I don't like this approach of misusing CONFIG_MIPS_INIT_STACK_IN_SRAM to
initialise gd in locked cache lines. The original idea was to allow an
early gd init if the machine has some SRAM or ScratchPad RAM immediately
available (e.g. through simple MMIO) to provide a C environment for
lowlevel_init() to avoid assembly code. But you still use assembly code
and also repeat exisiting generic code.
I think the init flow you need is:
reset:
...
CP0_CONFIG -> CONF_CM_UNCACHED
mips_early_init
mips_cache_reset
mips_cache_lock
setup_stack_gd
debug_uart_init
lowlevel_init
board_init_f
Instead of mips_sram_init we should introduce a mips_early_init or
cpu_early_init to provide room for stuff like PLL setup or custom CP0
register changes. This way we can split such code from lowlevel_init
which is actually intended to only init external memory.
mips_cache_lock could be implemented as a generic feature (alternatively
integrated directly in mips_cache_reset). By the way in the early days
MIPS U-Boot we already had this feature but it was removed years ago due
to a lack of users.
> diff --git a/arch/mips/mach-mtmips/mt7628/mt7628.h b/arch/mips/mach-mtmips/mt7628/mt7628.h
> new file mode 100644
> index 0000000000..b363c03480
> --- /dev/null
> +++ b/arch/mips/mach-mtmips/mt7628/mt7628.h
> @@ -0,0 +1,90 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2020 MediaTek Inc.
> + *
> + * Author: Weijie Gao <weijie.gao at mediatek.com>
> + */
> +
> +#ifndef _MT7628_H_
> +#define _MT7628_H_
> +
> +#define SYSCTL_BASE 0x10000000
> +#define SYSCTL_SIZE 0x100
> +#define MEMCTL_BASE 0x10000300
> +#define MEMCTL_SIZE 0x100
> +#define RBUSCTL_BASE 0x10000400
> +#define RBUSCTL_SIZE 0x100
> +#define RGCTL_BASE 0x10001000
> +#define RGCTL_SIZE 0x800
> +
> +#define SYSCTL_EFUSE_CFG_REG 0x08
> +#define EFUSE_MT7688 0x100000
> +
> +#define SYSCTL_CHIP_REV_ID_REG 0x0c
> +#define PKG_ID 0x10000
> +#define PKG_ID_AN 1
> +#define PKG_ID_KN 0
> +#define VER_S 8
> +#define VER_M 0xf00
> +#define ECO_S 0
> +#define ECO_M 0x0f
> +
> +#define SYSCTL_SYSCFG0_REG 0x10
> +#define XTAL_FREQ_SEL 0x40
> +#define XTAL_40MHZ 1
> +#define XTAL_25MHZ 0
> +#define CHIP_MODE_S 1
> +#define CHIP_MODE_M 0x0e
> +#define DRAM_TYPE 0x01
> +#define DRAM_DDR1 1
> +#define DRAM_DDR2 0
> +
> +#define SYSCTL_ROM_STATUS_REG 0x28
> +
> +#define SYSCTL_CLKCFG0_REG 0x2c
> +#define DIS_BBP_SLEEP 0x08
> +#define EN_BBP_CLK 0x04
> +#define CPU_PLL_FROM_BBP 0x02
> +#define CPU_PLL_FROM_XTAL 0x01
> +
> +#define SYSCTL_RSTCTL_REG 0x34
> +#define MC_RST 0x400
> +
> +#define RBUSCTL_DYN_CFG0_REG 0x40
> +#define CPU_FDIV_S 8
> +#define CPU_FDIV_M 0xf00
> +#define CPU_FFRAC_S 0
> +#define CPU_FFRAC_M 0x0f
> +
> +#define RGCTL_PMU_G0_REG 0x100
> +#define PMU_CFG_EN 0x80000000
> +
> +#define RGCTL_PMU_G1_REG 0x104
> +#define RG_BUCK_FPWM 0x02
> +
> +#define RGCTL_PMU_G3_REG 0x10c
> +#define NI_DDRLDO_STB 0x40000
> +#define NI_DDRLDO_EN 0x10000
> +#define RG_DDRLDO_VOSEL 0x40
> +
> +#define RGCTL_DDR_PAD_CK_G0_REG 0x700
> +#define RGCTL_DDR_PAD_CMD_G0_REG 0x708
> +#define RGCTL_DDR_PAD_DQ_G0_REG 0x710
> +#define RGCTL_DDR_PAD_DQS_G0_REG 0x718
> +#define RTT_S 8
> +#define RTT_M 0x700
> +
> +#define RGCTL_DDR_PAD_CK_G1_REG 0x704
> +#define RGCTL_DDR_PAD_CMD_G1_REG 0x70c
> +#define RGCTL_DDR_PAD_DQ_G1_REG 0x714
> +#define RGCTL_DDR_PAD_DQS_G1_REG 0x71c
> +#define DRVP_S 0
> +#define DRVP_M 0x0f
> +#define DRVN_S 8
> +#define DRVN_M 0xf00
> +
> +#ifndef __ASSEMBLY__
> +void mt7628_ddr_init(void);
> +#endif
> +
> +#endif /* _MT7628_H_ */
> diff --git a/arch/mips/mach-mtmips/mt76xx.h b/arch/mips/mach-mtmips/mt76xx.h
> deleted file mode 100644
> index 17473ea8f1..0000000000
> --- a/arch/mips/mach-mtmips/mt76xx.h
> +++ /dev/null
> @@ -1,32 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0+ */
> -/*
> - * Copyright (C) 2018 Stefan Roese <sr at denx.de>
> - */
> -
> -#ifndef __MT76XX_H
> -#define __MT76XX_H
> -
> -#define MT76XX_SYSCTL_BASE 0x10000000
> -
> -#define MT76XX_CHIPID_OFFS 0x00
> -#define MT76XX_CHIP_REV_ID_OFFS 0x0c
> -#define MT76XX_SYSCFG0_OFFS 0x10
> -
> -#define MT76XX_MEMCTRL_BASE (MT76XX_SYSCTL_BASE + 0x0300)
> -#define MT76XX_RGCTRL_BASE (MT76XX_SYSCTL_BASE + 0x1000)
> -
> -#define MT76XX_ROM_STATUS_REG (MT76XX_SYSCTL_BASE + 0x0028)
> -#define MT76XX_CLKCFG0_REG (MT76XX_SYSCTL_BASE + 0x002c)
> -#define MT76XX_DYN_CFG0_REG (MT76XX_SYSCTL_BASE + 0x0440)
> -
> -#define DDR_CFG1_REG (MT76XX_MEMCTRL_BASE + 0x44)
> -#define DDR_CFG2_REG (MT76XX_MEMCTRL_BASE + 0x48)
> -#define DDR_CFG3_REG (MT76XX_MEMCTRL_BASE + 0x4c)
> -#define DDR_CFG4_REG (MT76XX_MEMCTRL_BASE + 0x50)
> -
> -#ifndef __ASSEMBLY__
> -/* Prototypes */
> -void ddr_calibrate(void);
> -#endif
> -
> -#endif
> diff --git a/configs/gardena-smart-gateway-mt7688-ram_defconfig b/configs/gardena-smart-gateway-mt7688-ram_defconfig
> index 9324d9bb91..41e52a92cc 100644
> --- a/configs/gardena-smart-gateway-mt7688-ram_defconfig
> +++ b/configs/gardena-smart-gateway-mt7688-ram_defconfig
> @@ -8,6 +8,7 @@ CONFIG_SYS_BOOTCOUNT_ADDR=0xb000006c
> CONFIG_ENV_SECT_SIZE=0x10000
> CONFIG_ARCH_MTMIPS=y
> CONFIG_BOARD_GARDENA_SMART_GATEWAY_MT7688=y
> +CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
> # CONFIG_MIPS_BOOT_ENV_LEGACY is not set
> CONFIG_MIPS_BOOT_FDT=y
> CONFIG_ENV_VARS_UBOOT_CONFIG=y
> @@ -69,7 +70,6 @@ CONFIG_MT7628_ETH=y
> CONFIG_PHY=y
> CONFIG_SPI=y
> CONFIG_MT7621_SPI=y
> -CONFIG_SYSRESET_SYSCON=y
> CONFIG_WDT=y
> CONFIG_WDT_MT7621=y
> CONFIG_LZMA=y
> diff --git a/configs/gardena-smart-gateway-mt7688_defconfig b/configs/gardena-smart-gateway-mt7688_defconfig
> index 64b2c6a1c3..7cd06cb014 100644
> --- a/configs/gardena-smart-gateway-mt7688_defconfig
> +++ b/configs/gardena-smart-gateway-mt7688_defconfig
> @@ -9,8 +9,7 @@ CONFIG_ENV_SECT_SIZE=0x10000
> CONFIG_ARCH_MTMIPS=y
> CONFIG_BOARD_GARDENA_SMART_GATEWAY_MT7688=y
> CONFIG_BOOT_ROM=y
> -CONFIG_ONBOARD_DDR2_SIZE_1024MBIT=y
> -CONFIG_ONBOARD_DDR2_CHIP_WIDTH_16BIT=y
> +CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
> # CONFIG_MIPS_BOOT_ENV_LEGACY is not set
> CONFIG_MIPS_BOOT_FDT=y
> CONFIG_ENV_VARS_UBOOT_CONFIG=y
> @@ -72,7 +71,6 @@ CONFIG_MT7628_ETH=y
> CONFIG_PHY=y
> CONFIG_SPI=y
> CONFIG_MT7621_SPI=y
> -CONFIG_SYSRESET_SYSCON=y
> CONFIG_WDT=y
> CONFIG_WDT_MT7621=y
> CONFIG_LZMA=y
> diff --git a/configs/linkit-smart-7688-ram_defconfig b/configs/linkit-smart-7688-ram_defconfig
> index 6d2e9e4298..6d8969aacb 100644
> --- a/configs/linkit-smart-7688-ram_defconfig
> +++ b/configs/linkit-smart-7688-ram_defconfig
> @@ -6,6 +6,7 @@ CONFIG_NR_DRAM_BANKS=1
> CONFIG_ENV_SECT_SIZE=0x10000
> CONFIG_ARCH_MTMIPS=y
> CONFIG_BOARD_LINKIT_SMART_7688=y
> +CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
> # CONFIG_MIPS_BOOT_ENV_LEGACY is not set
> CONFIG_MIPS_BOOT_FDT=y
> CONFIG_FIT=y
> @@ -53,7 +54,6 @@ CONFIG_PHY=y
> CONFIG_MT76X8_USB_PHY=y
> CONFIG_SPI=y
> CONFIG_MT7621_SPI=y
> -CONFIG_SYSRESET_SYSCON=y
> CONFIG_USB=y
> CONFIG_DM_USB=y
> CONFIG_USB_EHCI_HCD=y
> diff --git a/configs/linkit-smart-7688_defconfig b/configs/linkit-smart-7688_defconfig
> index 28c8be2d53..9ddee9a861 100644
> --- a/configs/linkit-smart-7688_defconfig
> +++ b/configs/linkit-smart-7688_defconfig
> @@ -7,8 +7,7 @@ CONFIG_ENV_SECT_SIZE=0x10000
> CONFIG_ARCH_MTMIPS=y
> CONFIG_BOARD_LINKIT_SMART_7688=y
> CONFIG_BOOT_ROM=y
> -CONFIG_ONBOARD_DDR2_SIZE_1024MBIT=y
> -CONFIG_ONBOARD_DDR2_CHIP_WIDTH_16BIT=y
> +CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
> # CONFIG_MIPS_BOOT_ENV_LEGACY is not set
> CONFIG_MIPS_BOOT_FDT=y
> CONFIG_FIT=y
> @@ -57,7 +56,6 @@ CONFIG_PHY=y
> CONFIG_MT76X8_USB_PHY=y
> CONFIG_SPI=y
> CONFIG_MT7621_SPI=y
> -CONFIG_SYSRESET_SYSCON=y
> CONFIG_USB=y
> CONFIG_DM_USB=y
> CONFIG_USB_EHCI_HCD=y
>
--
- Daniel
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