MIPS: xilfpga: Add mipsfpga platform code

The xilfpga platform will be DT only.

Add required platform code.
DT files have already been added separately.

Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: robh+dt@kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11364/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/Kbuild.platforms b/arch/mips/Kbuild.platforms
index a424e46b50afaa85f5e081f5f9ee8e31887816bb..a96c81d1d22e6afce0973161639024e93346fd0b 100644 (file)
--- a/arch/mips/Kbuild.platforms
+++ b/arch/mips/Kbuild.platforms
@@ -33,6 +33,7 @@ platforms += sibyte
 platforms += sni
 platforms += txx9
 platforms += vr41xx
+platforms += xilfpga
 
 # include the platform specific files
 include $(patsubst %, $(srctree)/arch/mips/%/Platform, $(platforms))

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index a65341a037123166493b15d4c0d02013b56aed94..218aa67a2c52bb5fe37b7ee3b1b15e60208d0f89 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -404,6 +404,28 @@ config MACH_PISTACHIO
        help
          This enables support for the IMG Pistachio SoC platform.
 
+config MACH_XILFPGA
+       bool "MIPSfpga Xilinx based boards"
+       select ARCH_REQUIRE_GPIOLIB
+       select BOOT_ELF32
+       select BOOT_RAW
+       select BUILTIN_DTB
+       select CEVT_R4K
+       select COMMON_CLK
+       select CSRC_R4K
+       select IRQ_MIPS_CPU
+       select LIBFDT
+       select MIPS_CPU_SCACHE
+       select SYS_HAS_EARLY_PRINTK
+       select SYS_HAS_CPU_MIPS32_R2
+       select SYS_SUPPORTS_32BIT_KERNEL
+       select SYS_SUPPORTS_LITTLE_ENDIAN
+       select SYS_SUPPORTS_ZBOOT_UART16550
+       select USE_OF
+       select USE_GENERIC_EARLY_PRINTK_8250
+       help
+         This enables support for the IMG University Program MIPSfpga platform.
+
 config MIPS_MALTA
        bool "MIPS Malta board"
        select ARCH_MAY_HAVE_PC_FDC
@@ -970,6 +992,7 @@ source "arch/mips/loongson32/Kconfig"
 source "arch/mips/loongson64/Kconfig"
 source "arch/mips/netlogic/Kconfig"
 source "arch/mips/paravirt/Kconfig"
+source "arch/mips/xilfpga/Kconfig"
 
 endmenu
 

diff --git a/arch/mips/include/asm/mach-xilfpga/irq.h b/arch/mips/include/asm/mach-xilfpga/irq.h
new file mode 100644 (file)
index 0000000..0132a5b
--- /dev/null
+++ b/arch/mips/include/asm/mach-xilfpga/irq.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@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.
+ */
+
+#ifndef __MIPS_ASM_MACH_XILFPGA_IRQ_H__
+#define __MIPS_ASM_MACH_XILFPGA_IRQ_H__
+
+#define NR_IRQS 32
+
+#include_next <irq.h>
+
+#endif /* __MIPS_ASM_MACH_XILFPGA_IRQ_H__ */

diff --git a/arch/mips/xilfpga/Kconfig b/arch/mips/xilfpga/Kconfig
new file mode 100644 (file)
index 0000000..42a030a
--- /dev/null
+++ b/arch/mips/xilfpga/Kconfig
@@ -0,0 +1,9 @@
+choice
+       prompt "Machine type"
+       depends on MACH_XILFPGA
+       default XILFPGA_NEXYS4DDR
+
+config XILFPGA_NEXYS4DDR
+       bool "Nexys4DDR by Digilent"
+
+endchoice

diff --git a/arch/mips/xilfpga/Makefile b/arch/mips/xilfpga/Makefile
new file mode 100644 (file)
index 0000000..a4deec6
--- /dev/null
+++ b/arch/mips/xilfpga/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the Xilfpga
+#
+
+obj-y +=       init.o
+obj-y +=       intc.o
+obj-y +=       time.o

diff --git a/arch/mips/xilfpga/Platform b/arch/mips/xilfpga/Platform
new file mode 100644 (file)
index 0000000..ed375af
--- /dev/null
+++ b/arch/mips/xilfpga/Platform
@@ -0,0 +1,3 @@
+platform-$(CONFIG_MACH_XILFPGA) += xilfpga/
+cflags-$(CONFIG_MACH_XILFPGA) += -I$(srctree)/arch/mips/include/asm/mach-xilfpga
+load-$(CONFIG_MACH_XILFPGA) += 0xffffffff80100000

diff --git a/arch/mips/xilfpga/init.c b/arch/mips/xilfpga/init.c
new file mode 100644 (file)
index 0000000..ce2aee2
--- /dev/null
+++ b/arch/mips/xilfpga/init.c
@@ -0,0 +1,57 @@
+/*
+ * Xilfpga platform setup
+ *
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+
+#include <asm/prom.h>
+
+#define XILFPGA_UART_BASE      0xb0401000
+
+const char *get_system_type(void)
+{
+       return "MIPSfpga";
+}
+
+void __init plat_mem_setup(void)
+{
+       __dt_setup_arch(__dtb_start);
+       strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+}
+
+void __init prom_init(void)
+{
+       setup_8250_early_printk_port(XILFPGA_UART_BASE, 2, 50000);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+void __init device_tree_init(void)
+{
+       if (!initial_boot_params)
+               return;
+
+       unflatten_and_copy_device_tree();
+}
+
+static int __init plat_of_setup(void)
+{
+       if (!of_have_populated_dt())
+               panic("Device tree not present");
+
+       if (of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL))
+               panic("Failed to populate DT");
+
+       return 0;
+}
+arch_initcall(plat_of_setup);

diff --git a/arch/mips/xilfpga/intc.c b/arch/mips/xilfpga/intc.c
new file mode 100644 (file)
index 0000000..c4d1a71
--- /dev/null
+++ b/arch/mips/xilfpga/intc.c
@@ -0,0 +1,25 @@
+/*
+ * Xilfpga interrupt controller setup
+ *
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/of.h>
+#include <linux/of_irq.h>
+
+#include <asm/irq_cpu.h>
+
+static struct of_device_id of_irq_ids[] __initdata = {
+       { .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_irq_of_init },
+       {},
+};
+
+void __init arch_init_irq(void)
+{
+       of_irq_init(of_irq_ids);
+}

diff --git a/arch/mips/xilfpga/time.c b/arch/mips/xilfpga/time.c
new file mode 100644 (file)
index 0000000..a1c0fc8
--- /dev/null
+++ b/arch/mips/xilfpga/time.c
@@ -0,0 +1,41 @@
+/*
+ * Xilfpga clocksource/timer setup
+ *
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/of.h>
+
+#include <asm/time.h>
+
+void __init plat_time_init(void)
+{
+       struct device_node *np;
+       struct clk *clk;
+
+       of_clk_init(NULL);
+       clocksource_of_init();
+
+       np = of_get_cpu_node(0, NULL);
+       if (!np) {
+               pr_err("Failed to get CPU node\n");
+               return;
+       }
+
+       clk = of_clk_get(np, 0);
+       if (IS_ERR(clk)) {
+               pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
+               return;
+       }
+
+       mips_hpt_frequency = clk_get_rate(clk) / 2;
+       clk_put(clk);
+}