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Subject[PATCH v4 5/8] MIPS: ranchu: Add Ranchu as a new generic-based board
Date
From: Miodrag Dinic <miodrag.dinic@imgtec.com>

Provide amendments to the Mips generic platform framework so that
the new generic-based board Ranchu can be chosen to be built.

Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com>
Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
---
MAINTAINERS | 6 +++
arch/mips/configs/generic/board-ranchu.config | 30 +++++++++++
arch/mips/generic/Kconfig | 11 ++++
arch/mips/generic/Makefile | 1 +
arch/mips/generic/board-ranchu.c | 78 +++++++++++++++++++++++++++
5 files changed, 126 insertions(+)
create mode 100644 arch/mips/configs/generic/board-ranchu.config
create mode 100644 arch/mips/generic/board-ranchu.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 6426875..03403c9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11063,6 +11063,12 @@ S: Maintained
F: Documentation/blockdev/ramdisk.txt
F: drivers/block/brd.c

+RANCHU VIRTUAL BOARD FOR MIPS
+M: Miodrag Dinic <miodrag.dinic@imgtec.com>
+L: linux-mips@linux-mips.org
+S: Supported
+F: arch/mips/generic/board-ranchu.c
+
RANDOM NUMBER DRIVER
M: "Theodore Ts'o" <tytso@mit.edu>
S: Maintained
diff --git a/arch/mips/configs/generic/board-ranchu.config b/arch/mips/configs/generic/board-ranchu.config
new file mode 100644
index 0000000..fee9ad4
--- /dev/null
+++ b/arch/mips/configs/generic/board-ranchu.config
@@ -0,0 +1,30 @@
+CONFIG_VIRT_BOARD_RANCHU=y
+
+CONFIG_BATTERY_GOLDFISH=y
+CONFIG_FB=y
+CONFIG_FB_GOLDFISH=y
+CONFIG_GOLDFISH=y
+CONFIG_STAGING=y
+CONFIG_GOLDFISH_AUDIO=y
+CONFIG_GOLDFISH_PIC=y
+CONFIG_GOLDFISH_PIPE=y
+CONFIG_GOLDFISH_TTY=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_GOLDFISH=y
+
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_KEYBOARD=y
+CONFIG_KEYBOARD_GOLDFISH_EVENTS=y
+
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_POWER_SUPPLY=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SYSCON=y
+CONFIG_POWER_RESET_SYSCON_POWEROFF=y
+
+CONFIG_VIRTIO_BLK=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
+CONFIG_NETDEVICES=y
+CONFIG_VIRTIO_NET=y
diff --git a/arch/mips/generic/Kconfig b/arch/mips/generic/Kconfig
index 51ffbba..fe1231d 100644
--- a/arch/mips/generic/Kconfig
+++ b/arch/mips/generic/Kconfig
@@ -36,4 +36,15 @@ config FIT_IMAGE_FDT_BOSTON
enable this if you wish to boot on a MIPS Boston board, as it is
expected by the bootloader.

+config VIRT_BOARD_RANCHU
+ bool "Ranchu platform for Android emulator"
+ select LEGACY_BOARDS
+ help
+ This enables support for the platform used by Android emulator.
+
+ Ranchu platform consists of a set of virtual devices. This platform
+ enables emulation of variety of virtual configurations while using
+ Android emulator. Android emulator is based on Qemu, and contains
+ the support for the same set of virtual devices.
+
endif
diff --git a/arch/mips/generic/Makefile b/arch/mips/generic/Makefile
index 56b3ea5..14931f2 100644
--- a/arch/mips/generic/Makefile
+++ b/arch/mips/generic/Makefile
@@ -14,4 +14,5 @@ obj-y += proc.o

obj-$(CONFIG_YAMON_DT_SHIM) += yamon-dt.o
obj-$(CONFIG_LEGACY_BOARD_SEAD3) += board-sead3.o
+obj-$(CONFIG_VIRT_BOARD_RANCHU) += board-ranchu.o
obj-$(CONFIG_KEXEC) += kexec.o
diff --git a/arch/mips/generic/board-ranchu.c b/arch/mips/generic/board-ranchu.c
new file mode 100644
index 0000000..500874d
--- /dev/null
+++ b/arch/mips/generic/board-ranchu.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2017 Imagination Technologies Ltd.
+ * Author: Miodrag Dinic <miodrag.dinic@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/of_address.h>
+
+#include <asm/machine.h>
+#include <asm/time.h>
+
+#define GOLDFISH_TIMER_LOW 0x00
+#define GOLDFISH_TIMER_HIGH 0x04
+
+static __init uint64_t read_rtc_time(void __iomem *base)
+{
+ u64 time_low;
+ u64 time_high;
+
+ time_low = readl(base + GOLDFISH_TIMER_LOW);
+ time_high = readl(base + GOLDFISH_TIMER_HIGH);
+
+ return (time_high << 32) | time_low;
+}
+
+static __init unsigned int ranchu_measure_hpt_freq(void)
+{
+ u64 rtc_start, rtc_current, rtc_delta;
+ unsigned int start, count;
+ struct device_node *np;
+ void __iomem *rtc_base;
+
+ np = of_find_compatible_node(NULL, NULL, "google,goldfish-rtc");
+ if (!np)
+ panic("%s(): Failed to find 'google,goldfish-rtc' dt node!",
+ __func__);
+
+ rtc_base = of_iomap(np, 0);
+ if (!rtc_base)
+ panic("%s(): Failed to ioremap Goldfish RTC base!", __func__);
+
+ /*
+ * poll the nanosecond resolution RTC for 1 second
+ * to calibrate the CPU frequency
+ */
+ rtc_start = read_rtc_time(rtc_base);
+ start = read_c0_count();
+
+ do {
+ rtc_current = read_rtc_time(rtc_base);
+ rtc_delta = rtc_current - rtc_start;
+ } while (rtc_delta < NSEC_PER_SEC);
+
+ count = read_c0_count() - start;
+
+ count += 5000; /* round */
+ count -= count % 10000;
+
+ return count;
+}
+
+static const struct of_device_id ranchu_of_match[];
+
+MIPS_MACHINE(ranchu) = {
+ .matches = ranchu_of_match,
+ .measure_hpt_freq = ranchu_measure_hpt_freq,
+};
+
+static const struct of_device_id ranchu_of_match[] = {
+ {
+ .compatible = "mti,ranchu",
+ .data = &__mips_mach_ranchu,
+ },
+};
--
2.7.4
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