[PATCH 19/28] nios2: Device tree support
From: Ley Foon Tan
Date: Fri Apr 18 2014 - 08:44:18 EST
Add device tree support to arch/nios2.
Signed-off-by: Ley Foon Tan <lftan@xxxxxxxxxx>
---
arch/nios2/boot/dts/3c120_devboard.dts | 205 +++++++++++++++++++++++++++++++++
arch/nios2/boot/linked_dtb.S | 19 +++
arch/nios2/include/asm/prom.h | 26 +++++
arch/nios2/kernel/prom.c | 67 +++++++++++
arch/nios2/platform/platform.c | 69 +++++++++++
5 files changed, 386 insertions(+)
create mode 100644 arch/nios2/boot/dts/3c120_devboard.dts
create mode 100644 arch/nios2/boot/linked_dtb.S
create mode 100644 arch/nios2/include/asm/prom.h
create mode 100644 arch/nios2/kernel/prom.c
create mode 100644 arch/nios2/platform/platform.c
diff --git a/arch/nios2/boot/dts/3c120_devboard.dts b/arch/nios2/boot/dts/3c120_devboard.dts
new file mode 100644
index 0000000..cad29a9
--- /dev/null
+++ b/arch/nios2/boot/dts/3c120_devboard.dts
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2013 Altera Corporation
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * This file is generated by sopc2dts.
+ */
+
+/dts-v1/;
+
+/ {
+ model = "ALTR,qsys_ghrd_3c120";
+ compatible = "ALTR,qsys_ghrd_3c120";
+ #address-cells = < 1 >;
+ #size-cells = < 1 >;
+
+ cpus {
+ #address-cells = < 1 >;
+ #size-cells = < 0 >;
+
+ cpu: cpu@0x0 {
+ device_type = "cpu";
+ compatible = "ALTR,nios2-1.0";
+ reg = < 0x00000000 >;
+ interrupt-controller;
+ #interrupt-cells = < 1 >;
+ clock-frequency = < 125000000 >;
+ dcache-line-size = < 32 >;
+ icache-line-size = < 32 >;
+ dcache-size = < 32768 >;
+ icache-size = < 32768 >;
+ ALTR,implementation = "fast";
+ ALTR,pid-num-bits = < 8 >;
+ ALTR,tlb-num-ways = < 16 >;
+ ALTR,tlb-num-entries = < 128 >;
+ ALTR,tlb-ptr-sz = < 7 >;
+ ALTR,has-div = < 1 >;
+ ALTR,has-mul = < 1 >;
+ ALTR,reset-addr = < 0xc2800000 >;
+ ALTR,fast-tlb-miss-addr = < 0xc7fff400 >;
+ ALTR,exception-addr = < 0xd0000020 >;
+ ALTR,has-initda = < 1 >;
+ ALTR,has-mmu = < 1 >;
+ }; //end cpu@0x0 (cpu)
+ }; //end cpus
+
+ memory@0 {
+ device_type = "memory";
+ reg = < 0x10000000 0x08000000
+ 0x07FFF400 0x00000400 >;
+ }; //end memory@0
+
+ sopc@0 {
+ device_type = "soc";
+ ranges;
+ #address-cells = < 1 >;
+ #size-cells = < 1 >;
+ compatible = "ALTR,avalon", "simple-bus";
+ bus-frequency = < 125000000 >;
+
+ pb_cpu_to_io: bridge@0x8000000 {
+ compatible = "simple-bus";
+ reg = < 0x08000000 0x00800000 >;
+ #address-cells = < 1 >;
+ #size-cells = < 1 >;
+ ranges = < 0x00400000 0x08400000 0x00000020
+ 0x00004D40 0x08004D40 0x00000008
+ 0x00004D50 0x08004D50 0x00000008
+ 0x00004000 0x08004000 0x00000400
+ 0x00004400 0x08004400 0x00000040
+ 0x00004800 0x08004800 0x00000040
+ 0x00002000 0x08002000 0x00002000
+ 0x00004C80 0x08004C80 0x00000020
+ 0x00004CC0 0x08004CC0 0x00000010
+ 0x00004CE0 0x08004CE0 0x00000010
+ 0x00004D00 0x08004D00 0x00000010 >;
+
+ timer_1ms: timer@0x400000 {
+ compatible = "ALTR,timer-1.0";
+ reg = < 0x00400000 0x00000020 >;
+ interrupt-parent = < &cpu >;
+ interrupts = < 11 >;
+ clock-frequency = < 125000000 >;
+ }; //end timer@0x400000 (timer_1ms)
+
+ sysid: sysid@0x4d40 {
+ compatible = "ALTR,sysid-1.0";
+ reg = < 0x00004D40 0x00000008 >;
+ id = < 0 >;
+ timestamp = < 1364882880 >;
+ }; //end sysid@0x4d40 (sysid)
+
+ jtag_uart: serial@0x4d50 {
+ compatible = "ALTR,juart-1.0";
+ reg = < 0x00004D50 0x00000008 >;
+ interrupt-parent = < &cpu >;
+ interrupts = < 1 >;
+ }; //end serial@0x4d50 (jtag_uart)
+
+ tse_mac: ethernet@0x4000 {
+ compatible = "ALTR,tse-1.0";
+ reg = < 0x00004000 0x00000400
+ 0x00004400 0x00000040
+ 0x00004800 0x00000040
+ 0x00002000 0x00002000 >;
+ reg-names = "control_port", "rx_csr", "tx_csr", "s1";
+ interrupt-parent = < &cpu >;
+ interrupts = < 2 3 >;
+ interrupt-names = "rx_irq", "tx_irq";
+ rx-fifo-depth = < 8192 >;
+ tx-fifo-depth = < 8192 >;
+ address-bits = < 48 >;
+ max-frame-size = < 1518 >;
+ local-mac-address = [ 02 00 00 00 00 00 ];
+ phy-mode = "rgmii-id";
+ ALTR,mii-id = < 0 >;
+ phy-handle = < &phy0 >;
+ tse_mac_mdio: mdio {
+ compatible = "altr,tse-mdio";
+ #address-cells = < 1 >;
+ #size-cells = < 0 >;
+ phy0: ethernet-phy@18 {
+ reg = < 18 >;
+ device_type = "ethernet-phy";
+ };
+ };
+ }; //end ethernet@0x4000 (tse_mac)
+
+ uart: serial@0x4c80 {
+ compatible = "ALTR,uart-1.0";
+ reg = < 0x00004C80 0x00000020 >;
+ interrupt-parent = < &cpu >;
+ interrupts = < 10 >;
+ current-speed = < 115200 >;
+ clock-frequency = < 62500000 >;
+ }; //end serial@0x4c80 (uart)
+
+ user_led_pio_8out: gpio@0x4cc0 {
+ compatible = "ALTR,pio-1.0";
+ reg = < 0x00004CC0 0x00000010 >;
+ width = < 8 >;
+ resetvalue = < 255 >;
+ #gpio-cells = < 2 >;
+ gpio-controller;
+ }; //end gpio@0x4cc0 (user_led_pio_8out)
+
+ user_dipsw_pio_8in: gpio@0x4ce0 {
+ compatible = "ALTR,pio-1.0";
+ reg = < 0x00004CE0 0x00000010 >;
+ interrupt-parent = < &cpu >;
+ interrupts = < 8 >;
+ width = < 8 >;
+ resetvalue = < 0 >;
+ edge_type = < 2 >;
+ level_trigger = < 0 >;
+ altr,interrupt_type = < 3 >;
+ #gpio-cells = < 2 >;
+ gpio-controller;
+ }; //end gpio@0x4ce0 (user_dipsw_pio_8in)
+
+ user_pb_pio_4in: gpio@0x4d00 {
+ compatible = "ALTR,pio-1.0";
+ reg = < 0x00004D00 0x00000010 >;
+ interrupt-parent = < &cpu >;
+ interrupts = < 9 >;
+ width = < 4 >;
+ resetvalue = < 0 >;
+ edge_type = < 2 >;
+ level_trigger = < 0 >;
+ altr,interrupt_type = < 3 >;
+ #gpio-cells = < 2 >;
+ gpio-controller;
+ }; //end gpio@0x4d00 (user_pb_pio_4in)
+ }; //end bridge@0x8000000 (pb_cpu_to_io)
+
+ cfi_flash_64m: flash@0x0 {
+ compatible = "cfi-flash";
+ reg = < 0x00000000 0x04000000 >;
+ bank-width = < 2 >;
+ device-width = < 1 >;
+ #address-cells = < 1 >;
+ #size-cells = < 1 >;
+
+ partition@800000 {
+ reg = < 0x00800000 0x01E00000 >;
+ label = "JFFS2 Filesystem";
+ }; //end partition@800000
+ }; //end flash@0x0 (cfi_flash_64m)
+ }; //end sopc@0
+
+ chosen {
+ bootargs = "debug console=ttyJ0,115200";
+ }; //end chosen
+}; //end /
diff --git a/arch/nios2/boot/linked_dtb.S b/arch/nios2/boot/linked_dtb.S
new file mode 100644
index 0000000..071f922db338e2cb4064bc77bf346f50e584d04f
--- /dev/null
+++ b/arch/nios2/boot/linked_dtb.S
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2011 Thomas Chou <thomas@xxxxxxxxxxxxx>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+.section .dtb.init.rodata,"a"
+.incbin "arch/nios2/boot/system.dtb"
diff --git a/arch/nios2/include/asm/prom.h b/arch/nios2/include/asm/prom.h
new file mode 100644
index 0000000..7a71e4c50a42134ffceabd233f83b5d1c48917c1
--- /dev/null
+++ b/arch/nios2/include/asm/prom.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2010 Thomas Chou <thomas@xxxxxxxxxxxxx>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef _ASM_NIOS2_PROM_H
+#define _ASM_NIOS2_PROM_H
+
+extern int __dtb_start;
+
+extern unsigned long early_altera_uart_or_juart_console(void);
+
+#endif /* _ASM_NIOS2_PROM_H */
diff --git a/arch/nios2/kernel/prom.c b/arch/nios2/kernel/prom.c
new file mode 100644
index 0000000..a2d8308b939c33496e1416253b37c018d88c0c7f
--- /dev/null
+++ b/arch/nios2/kernel/prom.c
@@ -0,0 +1,67 @@
+/*
+ * Device tree support
+ *
+ * Copyright (C) 2013 Altera Corporation
+ * Copyright (C) 2010 Thomas Chou <thomas@xxxxxxxxxxxxx>
+ *
+ * Based on MIPS support for CONFIG_OF device tree support
+ *
+ * Copyright (C) 2010 Cisco Systems Inc. <dediao@xxxxxxxxx>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/bootmem.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/io.h>
+
+#include <asm/prom.h>
+#include <asm/sections.h>
+
+void __init early_init_dt_add_memory_arch(u64 base, u64 size)
+{
+ u64 kernel_start = (u64)virt_to_phys(_text);
+
+ if (!memory_size &&
+ (kernel_start >= base) && (kernel_start < (base + size)))
+ memory_size = size;
+
+ return;
+}
+
+void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
+{
+ return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
+}
+
+void __init early_init_devtree(void *params)
+{
+ if (params && be32_to_cpup((__be32 *)params) == OF_DT_HEADER)
+ initial_boot_params = params;
+#if defined(CONFIG_NIOS2_DTB_AT_PHYS_ADDR)
+ else if (be32_to_cpup((__be32 *)CONFIG_NIOS2_DTB_PHYS_ADDR) ==
+ OF_DT_HEADER)
+ initial_boot_params = (void *)CONFIG_NIOS2_DTB_PHYS_ADDR;
+#endif
+ else if (be32_to_cpu((__be32)__dtb_start) == OF_DT_HEADER)
+ initial_boot_params = (void *)&__dtb_start;
+ else
+ return;
+
+ early_init_dt_scan(initial_boot_params);
+}
diff --git a/arch/nios2/platform/platform.c b/arch/nios2/platform/platform.c
new file mode 100644
index 0000000..2e5b8f624f4d593a2d9bf544ea7cc06b076b44b4
--- /dev/null
+++ b/arch/nios2/platform/platform.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2013 Altera Corporation
+ * Copyright (C) 2011 Thomas Chou
+ * Copyright (C) 2011 Walter Goossens
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+#include <linux/io.h>
+
+#define NIOS2_ID_DEFAULT (0x1)
+#define NIOS2_REVISION_DEFAULT (0x1)
+
+static struct of_device_id altera_of_bus_ids[] __initdata = {
+ { .compatible = "simple-bus", },
+ { .compatible = "altr,avalon", },
+ {}
+};
+
+static void __init nios2_soc_device_init(void)
+{
+ struct soc_device *soc_dev;
+ struct soc_device_attribute *soc_dev_attr;
+ const char *machine;
+
+ machine = of_flat_dt_get_machine_name();
+ if (!machine)
+ return;
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return;
+
+ soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%u", NIOS2_ID_DEFAULT);
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d",
+ NIOS2_REVISION_DEFAULT);
+ soc_dev_attr->machine = kasprintf(GFP_KERNEL, "%s", machine);
+ soc_dev_attr->family = "Nios II";
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR_OR_NULL(soc_dev)) {
+ kfree(soc_dev_attr->soc_id);
+ kfree(soc_dev_attr->machine);
+ kfree(soc_dev_attr->revision);
+ kfree(soc_dev_attr);
+ return;
+ }
+
+ return;
+}
+
+static int __init nios2_device_probe(void)
+{
+ nios2_soc_device_init();
+
+ of_platform_bus_probe(NULL, altera_of_bus_ids, NULL);
+ return 0;
+}
+
+device_initcall(nios2_device_probe);
--
1.8.3.2
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