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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/generic/board-ingenic.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/generic/board-ingenic.c')
-rw-r--r--arch/mips/generic/board-ingenic.c200
1 files changed, 200 insertions, 0 deletions
diff --git a/arch/mips/generic/board-ingenic.c b/arch/mips/generic/board-ingenic.c
new file mode 100644
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+++ b/arch/mips/generic/board-ingenic.c
@@ -0,0 +1,200 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Support for Ingenic SoCs
+ *
+ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
+ * Copyright (C) 2011, Maarten ter Huurne <maarten@treewalker.org>
+ * Copyright (C) 2020 Paul Cercueil <paul@crapouillou.net>
+ */
+
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/pm.h>
+#include <linux/sizes.h>
+#include <linux/suspend.h>
+#include <linux/types.h>
+
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/machine.h>
+#include <asm/reboot.h>
+
+static __init char *ingenic_get_system_type(unsigned long machtype)
+{
+ switch (machtype) {
+ case MACH_INGENIC_X2100:
+ return "X2100";
+ case MACH_INGENIC_X2000H:
+ return "X2000H";
+ case MACH_INGENIC_X2000E:
+ return "X2000E";
+ case MACH_INGENIC_X2000:
+ return "X2000";
+ case MACH_INGENIC_X1830:
+ return "X1830";
+ case MACH_INGENIC_X1000E:
+ return "X1000E";
+ case MACH_INGENIC_X1000:
+ return "X1000";
+ case MACH_INGENIC_JZ4780:
+ return "JZ4780";
+ case MACH_INGENIC_JZ4775:
+ return "JZ4775";
+ case MACH_INGENIC_JZ4770:
+ return "JZ4770";
+ case MACH_INGENIC_JZ4760B:
+ return "JZ4760B";
+ case MACH_INGENIC_JZ4760:
+ return "JZ4760";
+ case MACH_INGENIC_JZ4755:
+ return "JZ4755";
+ case MACH_INGENIC_JZ4750:
+ return "JZ4750";
+ case MACH_INGENIC_JZ4725B:
+ return "JZ4725B";
+ case MACH_INGENIC_JZ4730:
+ return "JZ4730";
+ default:
+ return "JZ4740";
+ }
+}
+
+#define INGENIC_CGU_BASE 0x10000000
+#define JZ4750_CGU_CPCCR_ECS BIT(30)
+#define JZ4760_CGU_CPCCR_ECS BIT(31)
+
+static __init void ingenic_force_12M_ext(const void *fdt, unsigned int mask)
+{
+ const __be32 *prop;
+ unsigned int cpccr;
+ void __iomem *cgu;
+ bool use_div;
+ int offset;
+
+ offset = fdt_path_offset(fdt, "/ext");
+ if (offset < 0)
+ return;
+
+ prop = fdt_getprop(fdt, offset, "clock-frequency", NULL);
+ if (!prop)
+ return;
+
+ /*
+ * If the external oscillator is 24 MHz, enable the /2 divider to
+ * drive it down to 12 MHz, since this is what the hardware can work
+ * with.
+ * The 16 MHz cutoff value is arbitrary; setting it to 12 MHz would not
+ * work as the crystal frequency (as reported in the Device Tree) might
+ * be slightly above this value.
+ */
+ use_div = be32_to_cpup(prop) >= 16000000;
+
+ cgu = ioremap(INGENIC_CGU_BASE, 0x4);
+ if (!cgu)
+ return;
+
+ cpccr = ioread32(cgu);
+ if (use_div)
+ cpccr |= mask;
+ else
+ cpccr &= ~mask;
+ iowrite32(cpccr, cgu);
+
+ iounmap(cgu);
+}
+
+static __init const void *ingenic_fixup_fdt(const void *fdt, const void *match_data)
+{
+ /*
+ * Old devicetree files for the qi,lb60 board did not have a /memory
+ * node. Hardcode the memory info here.
+ */
+ if (!fdt_node_check_compatible(fdt, 0, "qi,lb60") &&
+ fdt_path_offset(fdt, "/memory") < 0)
+ early_init_dt_add_memory_arch(0, SZ_32M);
+
+ mips_machtype = (unsigned long)match_data;
+ system_type = ingenic_get_system_type(mips_machtype);
+
+ switch (mips_machtype) {
+ case MACH_INGENIC_JZ4750:
+ case MACH_INGENIC_JZ4755:
+ ingenic_force_12M_ext(fdt, JZ4750_CGU_CPCCR_ECS);
+ break;
+ case MACH_INGENIC_JZ4760:
+ ingenic_force_12M_ext(fdt, JZ4760_CGU_CPCCR_ECS);
+ break;
+ default:
+ break;
+ }
+
+ return fdt;
+}
+
+static const struct of_device_id ingenic_of_match[] __initconst = {
+ { .compatible = "ingenic,jz4730", .data = (void *)MACH_INGENIC_JZ4730 },
+ { .compatible = "ingenic,jz4740", .data = (void *)MACH_INGENIC_JZ4740 },
+ { .compatible = "ingenic,jz4725b", .data = (void *)MACH_INGENIC_JZ4725B },
+ { .compatible = "ingenic,jz4750", .data = (void *)MACH_INGENIC_JZ4750 },
+ { .compatible = "ingenic,jz4755", .data = (void *)MACH_INGENIC_JZ4755 },
+ { .compatible = "ingenic,jz4760", .data = (void *)MACH_INGENIC_JZ4760 },
+ { .compatible = "ingenic,jz4760b", .data = (void *)MACH_INGENIC_JZ4760B },
+ { .compatible = "ingenic,jz4770", .data = (void *)MACH_INGENIC_JZ4770 },
+ { .compatible = "ingenic,jz4775", .data = (void *)MACH_INGENIC_JZ4775 },
+ { .compatible = "ingenic,jz4780", .data = (void *)MACH_INGENIC_JZ4780 },
+ { .compatible = "ingenic,x1000", .data = (void *)MACH_INGENIC_X1000 },
+ { .compatible = "ingenic,x1000e", .data = (void *)MACH_INGENIC_X1000E },
+ { .compatible = "ingenic,x1830", .data = (void *)MACH_INGENIC_X1830 },
+ { .compatible = "ingenic,x2000", .data = (void *)MACH_INGENIC_X2000 },
+ { .compatible = "ingenic,x2000e", .data = (void *)MACH_INGENIC_X2000E },
+ { .compatible = "ingenic,x2000h", .data = (void *)MACH_INGENIC_X2000H },
+ { .compatible = "ingenic,x2100", .data = (void *)MACH_INGENIC_X2100 },
+ {}
+};
+
+MIPS_MACHINE(ingenic) = {
+ .matches = ingenic_of_match,
+ .fixup_fdt = ingenic_fixup_fdt,
+};
+
+static void ingenic_wait_instr(void)
+{
+ __asm__(".set push;\n"
+ ".set mips3;\n"
+ "wait;\n"
+ ".set pop;\n"
+ );
+}
+
+static void ingenic_halt(void)
+{
+ for (;;)
+ ingenic_wait_instr();
+}
+
+static int ingenic_pm_enter(suspend_state_t state)
+{
+ ingenic_wait_instr();
+
+ return 0;
+}
+
+static const struct platform_suspend_ops ingenic_pm_ops = {
+ .valid = suspend_valid_only_mem,
+ .enter = ingenic_pm_enter,
+};
+
+static int __init ingenic_pm_init(void)
+{
+ if (boot_cpu_type() == CPU_XBURST) {
+ if (IS_ENABLED(CONFIG_PM_SLEEP))
+ suspend_set_ops(&ingenic_pm_ops);
+ _machine_halt = ingenic_halt;
+ }
+
+ return 0;
+
+}
+late_initcall(ingenic_pm_init);