Introduce support for the MIPS based Microsemi Ocelot SoCs.
Signed-off-by: Alexandre Belloni <alexandre.bell...@bootlin.com>
---
arch/mips/Makefile | 4 ++
arch/mips/configs/generic/board-ocelot.config | 40 +++++++++++++
arch/mips/generic/Kconfig | 17 ++++++
arch/mips/generic/Makefile | 1 +
arch/mips/generic/board-ocelot.c | 83 +++++++++++++++++++++++++++
5 files changed, 145 insertions(+)
create mode 100644 arch/mips/configs/generic/board-ocelot.config
create mode 100644 arch/mips/generic/board-ocelot.c
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index d1ca839c3981..d2882244cf1f 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -543,6 +543,10 @@ generic_defconfig:
# now that the boards have been converted to use the generic kernel they are
# wrappers around the generic rules above.
#
+.PHONY: ocelot_defconfig
+ocelot_defconfig:
+ $(Q)$(MAKE) -f $(srctree)/Makefile 32r2el_defconfig BOARDS=ocelot
+
.PHONY: sead3_defconfig
sead3_defconfig:
$(Q)$(MAKE) -f $(srctree)/Makefile 32r2el_defconfig BOARDS=sead-3
diff --git a/arch/mips/configs/generic/board-ocelot.config
b/arch/mips/configs/generic/board-ocelot.config
new file mode 100644
index 000000000000..7f9e1eaccc34
--- /dev/null
+++ b/arch/mips/configs/generic/board-ocelot.config
@@ -0,0 +1,40 @@
+# require CONFIG_32BIT=y
+
+CONFIG_LEGACY_BOARD_OCELOT=y
+
+CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER=y
+
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_M25P80=y
+CONFIG_MTD_NAND=y
+CONFIG_MTD_NAND_PLATFORM=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_MTD_UBI=y
+
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+
+CONFIG_GPIO_SYSFS=y
+
+CONFIG_I2C=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_MUX=y
+
+CONFIG_SPI=y
+CONFIG_SPI_BITBANG=y
+CONFIG_SPI_DESIGNWARE=y
+CONFIG_SPI_SPIDEV=y
+
+CONFIG_POWER_RESET=y
+
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_XZ=y
+
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
diff --git a/arch/mips/generic/Kconfig b/arch/mips/generic/Kconfig
index 2ff3b17bfab1..04b8d2262f9d 100644
--- a/arch/mips/generic/Kconfig
+++ b/arch/mips/generic/Kconfig
@@ -27,6 +27,23 @@ config LEGACY_BOARD_SEAD3
Enable this to include support for booting on MIPS SEAD-3 FPGA-based
development boards, which boot using a legacy boot protocol.
+comment "MSCC Ocelot doesn't work with SEAD3 enabled"
+ depends on LEGACY_BOARD_SEAD3
+
+config LEGACY_BOARD_OCELOT
+ bool "Support MSCC Ocelot boards"
+ depends on LEGACY_BOARD_SEAD3=n
+ select LEGACY_BOARDS
+ select MSCC_OCELOT
+
+config MSCC_OCELOT
+ bool
+ select DMA_NONCOHERENT
+ select GPIOLIB
+ select MSCC_OCELOT_IRQ
+ select SYS_HAS_EARLY_PRINTK
+ select USE_GENERIC_EARLY_PRINTK_8250
+
comment "FIT/UHI Boards"
config FIT_IMAGE_FDT_BOSTON
diff --git a/arch/mips/generic/Makefile b/arch/mips/generic/Makefile
index 5c31e0c4697d..d03a36f869a4 100644
--- a/arch/mips/generic/Makefile
+++ b/arch/mips/generic/Makefile
@@ -14,5 +14,6 @@ obj-y += proc.o
obj-$(CONFIG_YAMON_DT_SHIM) += yamon-dt.o
obj-$(CONFIG_LEGACY_BOARD_SEAD3) += board-sead3.o
+obj-$(CONFIG_LEGACY_BOARD_OCELOT) += board-ocelot.o
obj-$(CONFIG_KEXEC) += kexec.o
obj-$(CONFIG_VIRT_BOARD_RANCHU) += board-ranchu.o
diff --git a/arch/mips/generic/board-ocelot.c b/arch/mips/generic/board-ocelot.c
new file mode 100644
index 000000000000..752c6edbe1d5
--- /dev/null
+++ b/arch/mips/generic/board-ocelot.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Microsemi MIPS SoC support
+ *
+ * Copyright (c) 2017 Microsemi Corporation
+ */
+#include <asm/machine.h>
+#include <asm/prom.h>
+
+#define DEVCPU_GCB_CHIP_REGS_CHIP_ID 0x71070000
+#define CHIP_ID_PART_ID GENMASK(27, 12)
+
+#define OCELOT_PART_ID (0x7514 << 12)
+
+#define UART_UART 0x70100000
+
+static __init bool ocelot_detect(void)
+{
+ u32 rev;
+
+ rev = __raw_readl((void *)DEVCPU_GCB_CHIP_REGS_CHIP_ID);
+
+ if ((rev & CHIP_ID_PART_ID) != OCELOT_PART_ID)
+ return 0;
+
+ /* Copy command line from bootloader early for Initrd detection */
+ if (fw_arg0 < 10 && (fw_arg1 & 0xFFF00000) == 0x80000000) {
+ unsigned int prom_argc = fw_arg0;
+ const char **prom_argv = (const char **)fw_arg1;
+
+ if (prom_argc > 1 && strlen(prom_argv[1]) > 0)
+ /* ignore all built-in args if any f/w args given */
+ strcpy(arcs_cmdline, prom_argv[1]);
+ }
+
+ return 1;
+}
+
+static __init unsigned int ocelot_measure_hpt_freq(void)
+{
+ struct device_node *np;
+ u32 freq;
+
+ np = of_find_node_by_name(NULL, "cpus");
+ if (!np)
+ panic("missing 'cpus' DT node");
+ if (of_property_read_u32(np, "mips-hpt-frequency", &freq) < 0)
+ panic("missing 'mips-hpt-frequency' property");
+ of_node_put(np);
+
+ return freq;
+}
+
+static void __init ocelot_earlyprintk_init(void)
+{
+ void __iomem *uart_base;
+
+ uart_base = ioremap_nocache(UART_UART, 0x20);
+ setup_8250_early_printk_port((unsigned long)uart_base, 2, 50000);
+}
+
+static void __init ocelot_late_init(void)
+{
+ ocelot_earlyprintk_init();
+}
+
+static __init const void *ocelot_fixup_fdt(const void *fdt,
+ const void *match_data)
+{
+ /* This has to be done so late because ioremap needs to work */
+ late_time_init = ocelot_late_init;
+
+ return fdt;
+}
+
+extern char __dtb_ocelot_pcb123_begin[];
+
+MIPS_MACHINE(ocelot) = {
+ .fdt = __dtb_ocelot_pcb123_begin,
+ .fixup_fdt = ocelot_fixup_fdt,
+ .detect = ocelot_detect,
+ .measure_hpt_freq = ocelot_measure_hpt_freq,
+};
--
2.16.2
