[PATCH v2 10/13] MIPS: generic: Add support for Ingenic SoCs

From: Paul Cercueil
Date: Tue Aug 11 2020 - 20:16:35 EST

Add support for Ingenic SoCs in arch/mips/generic/.

The Kconfig changes are here to ensure that it is possible to compile
either a generic kernel that supports Ingenic SoCs, or a Ingenic-only
kernel, both using the same code base, to avoid duplicated code.

Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
---

Notes:
v2: Rework the code around "system_type" to match the changes
done in the previous patches.

arch/mips/Kbuild.platforms | 1 -
arch/mips/Kconfig | 32 +++++----
arch/mips/generic/Kconfig | 6 ++
arch/mips/generic/Makefile | 1 +
arch/mips/generic/board-ingenic.c | 108 ++++++++++++++++++++++++++++++
arch/mips/jz4740/Kconfig | 16 +++--
6 files changed, 146 insertions(+), 18 deletions(-)
create mode 100644 arch/mips/generic/board-ingenic.c

diff --git a/arch/mips/Kbuild.platforms b/arch/mips/Kbuild.platforms
index a13c4cf6e608..949222c09927 100644
--- a/arch/mips/Kbuild.platforms
+++ b/arch/mips/Kbuild.platforms
@@ -13,7 +13,6 @@ platform-$(CONFIG_MIPS_COBALT) += cobalt/
platform-$(CONFIG_MACH_DECSTATION) += dec/
platform-$(CONFIG_MIPS_GENERIC) += generic/
platform-$(CONFIG_MACH_JAZZ) += jazz/
-platform-$(CONFIG_MACH_INGENIC) += jz4740/
platform-$(CONFIG_LANTIQ) += lantiq/
platform-$(CONFIG_MACH_LOONGSON2EF) += loongson2ef/
platform-$(CONFIG_MACH_LOONGSON32) += loongson32/
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 4d57f46cd936..5b7c7c87f9b2 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -97,6 +97,23 @@ config MIPS_FIXUP_BIGPHYS_ADDR
config MIPS_GENERIC
bool

+config MACH_INGENIC
+ bool
+ select SYS_SUPPORTS_32BIT_KERNEL
+ select SYS_SUPPORTS_LITTLE_ENDIAN
+ select SYS_SUPPORTS_ZBOOT
+ select CPU_SUPPORTS_HUGEPAGES
+ select DMA_NONCOHERENT
+ select IRQ_MIPS_CPU
+ select PINCTRL
+ select GPIOLIB
+ select COMMON_CLK
+ select GENERIC_IRQ_CHIP
+ select BUILTIN_DTB if MIPS_NO_APPENDED_DTB
+ select USE_OF
+ select CPU_SUPPORTS_CPUFREQ
+ select MIPS_EXTERNAL_TIMER
+
menu "Machine selection"

choice
@@ -394,20 +411,11 @@ config MACH_JAZZ
Members include the Acer PICA, MIPS Magnum 4000, MIPS Millennium and
Olivetti M700-10 workstations.

-config MACH_INGENIC
+config MACH_INGENIC_SOC
bool "Ingenic SoC based machines"
- select SYS_SUPPORTS_32BIT_KERNEL
- select SYS_SUPPORTS_LITTLE_ENDIAN
+ select MIPS_GENERIC
+ select MACH_INGENIC
select SYS_SUPPORTS_ZBOOT_UART16550
- select CPU_SUPPORTS_HUGEPAGES
- select DMA_NONCOHERENT
- select IRQ_MIPS_CPU
- select PINCTRL
- select GPIOLIB
- select COMMON_CLK
- select GENERIC_IRQ_CHIP
- select BUILTIN_DTB if MIPS_NO_APPENDED_DTB
- select USE_OF

config LANTIQ
bool "Lantiq based platforms"
diff --git a/arch/mips/generic/Kconfig b/arch/mips/generic/Kconfig
index 5216c850b7e2..55d9aed7ced9 100644
--- a/arch/mips/generic/Kconfig
+++ b/arch/mips/generic/Kconfig
@@ -73,6 +73,12 @@ config FIT_IMAGE_FDT_OCELOT
from Microsemi in the FIT kernel image.
This requires u-boot on the platform.

+config BOARD_INGENIC
+ bool "Support boards based on Ingenic SoCs"
+ select MACH_INGENIC_GENERIC
+ help
+ Enable support for boards based on Ingenic SoCs.
+
config VIRT_BOARD_RANCHU
bool "Support Ranchu platform for Android emulator"
help
diff --git a/arch/mips/generic/Makefile b/arch/mips/generic/Makefile
index 2384a6b09e4c..e37a59bae0a6 100644
--- a/arch/mips/generic/Makefile
+++ b/arch/mips/generic/Makefile
@@ -11,4 +11,5 @@ obj-y += proc.o
obj-$(CONFIG_YAMON_DT_SHIM) += yamon-dt.o
obj-$(CONFIG_LEGACY_BOARD_SEAD3) += board-sead3.o
obj-$(CONFIG_LEGACY_BOARD_OCELOT) += board-ocelot.o
+obj-$(CONFIG_MACH_INGENIC) += board-ingenic.o
obj-$(CONFIG_VIRT_BOARD_RANCHU) += board-ranchu.o
diff --git a/arch/mips/generic/board-ingenic.c b/arch/mips/generic/board-ingenic.c
new file mode 100644
index 000000000000..0d7de8f9713d
--- /dev/null
+++ b/arch/mips/generic/board-ingenic.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Support for Ingenic SoCs
+ *
+ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@xxxxxxxxxx>
+ * Copyright (C) 2011, Maarten ter Huurne <maarten@xxxxxxxxxxxxxx>
+ * Copyright (C) 2020 Paul Cercueil <paul@xxxxxxxxxxxxxxx>
+ */
+
+#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/machine.h>
+#include <asm/reboot.h>
+
+static __init char *ingenic_get_system_type(unsigned long machtype)
+{
+ switch (machtype) {
+ case MACH_INGENIC_X1830:
+ return "X1830";
+ case MACH_INGENIC_X1000:
+ return "X1000";
+ case MACH_INGENIC_JZ4780:
+ return "JZ4780";
+ case MACH_INGENIC_JZ4770:
+ return "JZ4770";
+ case MACH_INGENIC_JZ4725B:
+ return "JZ4725B";
+ default:
+ return "JZ4740";
+ }
+}
+
+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);
+
+ return fdt;
+}
+
+static const struct of_device_id ingenic_of_match[] __initconst = {
+ { .compatible = "ingenic,jz4740", .data = (void *)MACH_INGENIC_JZ4740 },
+ { .compatible = "ingenic,jz4725b", .data = (void *)MACH_INGENIC_JZ4725B },
+ { .compatible = "ingenic,jz4770", .data = (void *)MACH_INGENIC_JZ4770 },
+ { .compatible = "ingenic,jz4780", .data = (void *)MACH_INGENIC_JZ4780 },
+ { .compatible = "ingenic,x1000", .data = (void *)MACH_INGENIC_X1000 },
+ { .compatible = "ingenic,x1830", .data = (void *)MACH_INGENIC_X1830 },
+ {}
+};
+
+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 __maybe_unused ingenic_pm_enter(suspend_state_t state)
+{
+ ingenic_wait_instr();
+
+ return 0;
+}
+
+static const struct platform_suspend_ops ingenic_pm_ops __maybe_unused = {
+ .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);
diff --git a/arch/mips/jz4740/Kconfig b/arch/mips/jz4740/Kconfig
index c2a6fbf8e411..3238e16febd5 100644
--- a/arch/mips/jz4740/Kconfig
+++ b/arch/mips/jz4740/Kconfig
@@ -1,15 +1,21 @@
# SPDX-License-Identifier: GPL-2.0
+
+config MACH_INGENIC_GENERIC
+ bool
+ select MACH_INGENIC
+ select MACH_JZ4740
+ select MACH_JZ4770
+ select MACH_JZ4780
+ select MACH_X1000
+
choice
prompt "Machine type"
- depends on MACH_INGENIC
+ depends on MACH_INGENIC_SOC
default INGENIC_GENERIC_BOARD

config INGENIC_GENERIC_BOARD
bool "Generic board"
- select MACH_JZ4740
- select MACH_JZ4770
- select MACH_JZ4780
- select MACH_X1000
+ select MACH_INGENIC_GENERIC

config JZ4740_QI_LB60
bool "Qi Hardware Ben NanoNote"
--
2.28.0