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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/mips/ralink/mt7620.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/mips/ralink/mt7620.c')
-rw-r--r--arch/mips/ralink/mt7620.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c
new file mode 100644
index 0000000000..672249a13a
--- /dev/null
+++ b/arch/mips/ralink/mt7620.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2013 John Crispin <john@phrozen.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/bug.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+
+#include <asm/mipsregs.h>
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/mt7620.h>
+
+#include "common.h"
+
+/* analog */
+#define PMU0_CFG 0x88
+#define PMU_SW_SET BIT(28)
+#define A_DCDC_EN BIT(24)
+#define A_SSC_PERI BIT(19)
+#define A_SSC_GEN BIT(18)
+#define A_SSC_M 0x3
+#define A_SSC_S 16
+#define A_DLY_M 0x7
+#define A_DLY_S 8
+#define A_VTUNE_M 0xff
+
+/* digital */
+#define PMU1_CFG 0x8C
+#define DIG_SW_SEL BIT(25)
+
+/* EFUSE bits */
+#define EFUSE_MT7688 0x100000
+
+/* DRAM type bit */
+#define DRAM_TYPE_MT7628_MASK 0x1
+
+/* does the board have sdram or ddram */
+static int dram_type;
+
+static struct ralink_soc_info *soc_info_ptr;
+
+static __init void
+mt7620_dram_init(struct ralink_soc_info *soc_info)
+{
+ switch (dram_type) {
+ case SYSCFG0_DRAM_TYPE_SDRAM:
+ pr_info("Board has SDRAM\n");
+ soc_info->mem_size_min = MT7620_SDRAM_SIZE_MIN;
+ soc_info->mem_size_max = MT7620_SDRAM_SIZE_MAX;
+ break;
+
+ case SYSCFG0_DRAM_TYPE_DDR1:
+ pr_info("Board has DDR1\n");
+ soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
+ soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
+ break;
+
+ case SYSCFG0_DRAM_TYPE_DDR2:
+ pr_info("Board has DDR2\n");
+ soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
+ soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
+ break;
+ default:
+ BUG();
+ }
+}
+
+static __init void
+mt7628_dram_init(struct ralink_soc_info *soc_info)
+{
+ switch (dram_type) {
+ case SYSCFG0_DRAM_TYPE_DDR1_MT7628:
+ pr_info("Board has DDR1\n");
+ soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
+ soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
+ break;
+
+ case SYSCFG0_DRAM_TYPE_DDR2_MT7628:
+ pr_info("Board has DDR2\n");
+ soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
+ soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
+ break;
+ default:
+ BUG();
+ }
+}
+
+static unsigned int __init mt7620_get_soc_name0(void)
+{
+ return __raw_readl(MT7620_SYSC_BASE + SYSC_REG_CHIP_NAME0);
+}
+
+static unsigned int __init mt7620_get_soc_name1(void)
+{
+ return __raw_readl(MT7620_SYSC_BASE + SYSC_REG_CHIP_NAME1);
+}
+
+static bool __init mt7620_soc_valid(void)
+{
+ if (mt7620_get_soc_name0() == MT7620_CHIP_NAME0 &&
+ mt7620_get_soc_name1() == MT7620_CHIP_NAME1)
+ return true;
+ else
+ return false;
+}
+
+static bool __init mt7628_soc_valid(void)
+{
+ if (mt7620_get_soc_name0() == MT7620_CHIP_NAME0 &&
+ mt7620_get_soc_name1() == MT7628_CHIP_NAME1)
+ return true;
+ else
+ return false;
+}
+
+static unsigned int __init mt7620_get_rev(void)
+{
+ return __raw_readl(MT7620_SYSC_BASE + SYSC_REG_CHIP_REV);
+}
+
+static unsigned int __init mt7620_get_bga(void)
+{
+ return (mt7620_get_rev() >> CHIP_REV_PKG_SHIFT) & CHIP_REV_PKG_MASK;
+}
+
+static unsigned int __init mt7620_get_efuse(void)
+{
+ return __raw_readl(MT7620_SYSC_BASE + SYSC_REG_EFUSE_CFG);
+}
+
+static unsigned int __init mt7620_get_soc_ver(void)
+{
+ return (mt7620_get_rev() >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK;
+}
+
+static unsigned int __init mt7620_get_soc_eco(void)
+{
+ return (mt7620_get_rev() & CHIP_REV_ECO_MASK);
+}
+
+static const char __init *mt7620_get_soc_name(struct ralink_soc_info *soc_info)
+{
+ if (mt7620_soc_valid()) {
+ u32 bga = mt7620_get_bga();
+
+ if (bga) {
+ ralink_soc = MT762X_SOC_MT7620A;
+ soc_info->compatible = "ralink,mt7620a-soc";
+ return "MT7620A";
+ } else {
+ ralink_soc = MT762X_SOC_MT7620N;
+ soc_info->compatible = "ralink,mt7620n-soc";
+ return "MT7620N";
+ }
+ } else if (mt7628_soc_valid()) {
+ u32 efuse = mt7620_get_efuse();
+ unsigned char *name = NULL;
+
+ if (efuse & EFUSE_MT7688) {
+ ralink_soc = MT762X_SOC_MT7688;
+ name = "MT7688";
+ } else {
+ ralink_soc = MT762X_SOC_MT7628AN;
+ name = "MT7628AN";
+ }
+ soc_info->compatible = "ralink,mt7628an-soc";
+ return name;
+ } else {
+ panic("mt762x: unknown SoC, n0:%08x n1:%08x\n",
+ mt7620_get_soc_name0(), mt7620_get_soc_name1());
+ }
+}
+
+static const char __init *mt7620_get_soc_id_name(void)
+{
+ if (ralink_soc == MT762X_SOC_MT7620A)
+ return "mt7620a";
+ else if (ralink_soc == MT762X_SOC_MT7620N)
+ return "mt7620n";
+ else if (ralink_soc == MT762X_SOC_MT7688)
+ return "mt7688";
+ else if (ralink_soc == MT762X_SOC_MT7628AN)
+ return "mt7628n";
+ else
+ return "invalid";
+}
+
+static int __init mt7620_soc_dev_init(void)
+{
+ struct soc_device *soc_dev;
+ struct soc_device_attribute *soc_dev_attr;
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return -ENOMEM;
+
+ soc_dev_attr->family = "Ralink";
+ soc_dev_attr->soc_id = mt7620_get_soc_id_name();
+
+ soc_dev_attr->data = soc_info_ptr;
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev)) {
+ kfree(soc_dev_attr);
+ return PTR_ERR(soc_dev);
+ }
+
+ return 0;
+}
+device_initcall(mt7620_soc_dev_init);
+
+void __init prom_soc_init(struct ralink_soc_info *soc_info)
+{
+ const char *name = mt7620_get_soc_name(soc_info);
+ u32 cfg0;
+ u32 pmu0;
+ u32 pmu1;
+
+ snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
+ "MediaTek %s ver:%u eco:%u",
+ name, mt7620_get_soc_ver(), mt7620_get_soc_eco());
+
+ cfg0 = __raw_readl(MT7620_SYSC_BASE + SYSC_REG_SYSTEM_CONFIG0);
+ if (is_mt76x8()) {
+ dram_type = cfg0 & DRAM_TYPE_MT7628_MASK;
+ } else {
+ dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) &
+ SYSCFG0_DRAM_TYPE_MASK;
+ if (dram_type == SYSCFG0_DRAM_TYPE_UNKNOWN)
+ dram_type = SYSCFG0_DRAM_TYPE_SDRAM;
+ }
+
+ soc_info->mem_base = MT7620_DRAM_BASE;
+ if (is_mt76x8())
+ mt7628_dram_init(soc_info);
+ else
+ mt7620_dram_init(soc_info);
+
+ pmu0 = __raw_readl(MT7620_SYSC_BASE + PMU0_CFG);
+ pmu1 = __raw_readl(MT7620_SYSC_BASE + PMU1_CFG);
+
+ pr_info("Analog PMU set to %s control\n",
+ (pmu0 & PMU_SW_SET) ? ("sw") : ("hw"));
+ pr_info("Digital PMU set to %s control\n",
+ (pmu1 & DIG_SW_SEL) ? ("sw") : ("hw"));
+
+ soc_info_ptr = soc_info;
+}