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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/rt288x.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/rt288x.c')
-rw-r--r--arch/mips/ralink/rt288x.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/arch/mips/ralink/rt288x.c b/arch/mips/ralink/rt288x.c
new file mode 100644
index 0000000000..ce8b5b6025
--- /dev/null
+++ b/arch/mips/ralink/rt288x.c
@@ -0,0 +1,110 @@
+// 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/slab.h>
+#include <linux/sys_soc.h>
+
+#include <asm/mipsregs.h>
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/rt288x.h>
+
+#include "common.h"
+
+static struct ralink_soc_info *soc_info_ptr;
+
+static unsigned int __init rt2880_get_soc_name0(void)
+{
+ return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_NAME0);
+}
+
+static unsigned int __init rt2880_get_soc_name1(void)
+{
+ return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_NAME1);
+}
+
+static bool __init rt2880_soc_valid(void)
+{
+ if (rt2880_get_soc_name0() == RT2880_CHIP_NAME0 &&
+ rt2880_get_soc_name1() == RT2880_CHIP_NAME1)
+ return true;
+ else
+ return false;
+}
+
+static const char __init *rt2880_get_soc_name(void)
+{
+ if (rt2880_soc_valid())
+ return "RT2880";
+ else
+ return "invalid";
+}
+
+static unsigned int __init rt2880_get_soc_id(void)
+{
+ return __raw_readl(RT2880_SYSC_BASE + SYSC_REG_CHIP_ID);
+}
+
+static unsigned int __init rt2880_get_soc_ver(void)
+{
+ return (rt2880_get_soc_id() >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK;
+}
+
+static unsigned int __init rt2880_get_soc_rev(void)
+{
+ return (rt2880_get_soc_id() & CHIP_ID_REV_MASK);
+}
+
+static int __init rt2880_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 = rt2880_get_soc_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(rt2880_soc_dev_init);
+
+void __init prom_soc_init(struct ralink_soc_info *soc_info)
+{
+ if (rt2880_soc_valid())
+ soc_info->compatible = "ralink,r2880-soc";
+ else
+ panic("rt288x: unknown SoC, n0:%08x n1:%08x",
+ rt2880_get_soc_name0(), rt2880_get_soc_name1());
+
+ snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
+ "Ralink %s id:%u rev:%u",
+ rt2880_get_soc_name(),
+ rt2880_get_soc_ver(),
+ rt2880_get_soc_rev());
+
+ soc_info->mem_base = RT2880_SDRAM_BASE;
+ soc_info->mem_size_min = RT2880_MEM_SIZE_MIN;
+ soc_info->mem_size_max = RT2880_MEM_SIZE_MAX;
+
+ ralink_soc = RT2880_SOC;
+ soc_info_ptr = soc_info;
+}