[RFC PATCHv3 1/2] ARM: socfpga: initial support for Altera's SOCFPGA platform
dinguyen at altera.com
dinguyen at altera.com
Tue Jul 17 20:50:55 EDT 2012
From: Dinh Nguyen <dinguyen at altera.com>
Adding core definitions for Altera's SOCFPGA ARM platform.
Signed-off-by: Dinh Nguyen <dinguyen at altera.com>
Reviewed-by: Pavel Machek <pavel at denx.de>
Reviewed-by: Rob Herring <rob.herring at calxeda.com>
---
MAINTAINERS | 10 ++++
arch/arm/Kconfig | 19 +++++++
arch/arm/Makefile | 1 +
arch/arm/mach-socfpga/Makefile | 5 ++
arch/arm/mach-socfpga/Makefile.boot | 1 +
arch/arm/mach-socfpga/common.h | 24 +++++++++
arch/arm/mach-socfpga/include/mach/debug-macro.S | 16 ++++++
arch/arm/mach-socfpga/include/mach/timex.h | 19 +++++++
arch/arm/mach-socfpga/include/mach/uncompress.h | 9 ++++
arch/arm/mach-socfpga/socfpga.c | 62 ++++++++++++++++++++++
drivers/clk/Makefile | 1 +
drivers/clk/socfpga/Makefile | 1 +
drivers/clk/socfpga/clk.c | 47 ++++++++++++++++
13 files changed, 215 insertions(+)
create mode 100644 arch/arm/mach-socfpga/Makefile
create mode 100644 arch/arm/mach-socfpga/Makefile.boot
create mode 100644 arch/arm/mach-socfpga/common.h
create mode 100644 arch/arm/mach-socfpga/include/mach/debug-macro.S
create mode 100644 arch/arm/mach-socfpga/include/mach/timex.h
create mode 100644 arch/arm/mach-socfpga/include/mach/uncompress.h
create mode 100644 arch/arm/mach-socfpga/socfpga.c
create mode 100644 drivers/clk/socfpga/Makefile
create mode 100644 drivers/clk/socfpga/clk.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 1b71f6c..0239cdb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1103,6 +1103,16 @@ S: Supported
F: arch/arm/mach-shmobile/
F: drivers/sh/
+ARM/SOCFPGA ARCHITECTURE
+M: Dinh Nguyen <dinguyen at altera.com>
+S: Maintained
+F: arch/arm/mach-socfpga/
+
+ARM/SOCFPGA CLOCK FRAMEWORK SUPPORT
+M: Dinh Nguyen <dinguyen at altera.com>
+S: Maintained
+F: drivers/clk/socfpga/
+
ARM/TECHNOLOGIC SYSTEMS TS7250 MACHINE SUPPORT
M: Lennert Buytenhek <kernel at wantstofly.org>
L: linux-arm-kernel at lists.infradead.org (moderated for non-subscribers)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 57eb6ef..b9f5fc9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -250,6 +250,25 @@ choice
prompt "ARM system type"
default ARCH_VERSATILE
+config ARCH_SOCFPGA
+ bool "Altera SOCFPGA family"
+ select ARCH_WANT_OPTIONAL_GPIOLIB
+ select ARM_AMBA
+ select ARM_GIC
+ select CACHE_L2X0
+ select CLKDEV_LOOKUP
+ select COMMON_CLK
+ select CPU_V7
+ select DW_APB_TIMER
+ select DW_APB_TIMER_OF
+ select GENERIC_CLOCKEVENTS
+ select GPIO_PL061 if GPIOLIB
+ select HAVE_ARM_SCU
+ select SPARSE_IRQ
+ select USE_OF
+ help
+ This enables support for Altera SOCFPGA Cyclone V platform
+
config ARCH_INTEGRATOR
bool "ARM Ltd. Integrator family"
select ARM_AMBA
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 0298b00..1fe5702 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -193,6 +193,7 @@ machine-$(CONFIG_MACH_SPEAR310) := spear3xx
machine-$(CONFIG_MACH_SPEAR320) := spear3xx
machine-$(CONFIG_MACH_SPEAR600) := spear6xx
machine-$(CONFIG_ARCH_ZYNQ) := zynq
+machine-$(CONFIG_ARCH_SOCFPGA) := socfpga
# Platform directory name. This list is sorted alphanumerically
# by CONFIG_* macro name.
diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile
new file mode 100644
index 0000000..4fb9324
--- /dev/null
+++ b/arch/arm/mach-socfpga/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y := socfpga.o
diff --git a/arch/arm/mach-socfpga/Makefile.boot b/arch/arm/mach-socfpga/Makefile.boot
new file mode 100644
index 0000000..dae9661
--- /dev/null
+++ b/arch/arm/mach-socfpga/Makefile.boot
@@ -0,0 +1 @@
+zreladdr-y := 0x00008000
diff --git a/arch/arm/mach-socfpga/common.h b/arch/arm/mach-socfpga/common.h
new file mode 100644
index 0000000..edb7bde
--- /dev/null
+++ b/arch/arm/mach-socfpga/common.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2012 Altera Corporation <www.altera.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.
+ *
+ * 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 __MACH_SOCFPGA_COMMON_H
+#define __MACH_SOCFPGA_COMMON_H
+
+extern struct sys_timer dw_apb_timer;
+extern void socfpga_init_clocks(void);
+
+#endif
diff --git a/arch/arm/mach-socfpga/include/mach/debug-macro.S b/arch/arm/mach-socfpga/include/mach/debug-macro.S
new file mode 100644
index 0000000..d6f26d2
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/debug-macro.S
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+ .macro addruart, rp, rv, tmp
+ mov \rp, #DEBUG_LL_UART_OFFSET
+ orr \rp, \rp, #0x00c00000
+ orr \rv, \rp, #0xfe000000 @ virtual base
+ orr \rp, \rp, #0xff000000 @ physical base
+ .endm
+
diff --git a/arch/arm/mach-socfpga/include/mach/timex.h b/arch/arm/mach-socfpga/include/mach/timex.h
new file mode 100644
index 0000000..43df435
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/timex.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2003 ARM Limited
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define CLOCK_TICK_RATE (50000000 / 16)
diff --git a/arch/arm/mach-socfpga/include/mach/uncompress.h b/arch/arm/mach-socfpga/include/mach/uncompress.h
new file mode 100644
index 0000000..bbe20e6
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/uncompress.h
@@ -0,0 +1,9 @@
+#ifndef __MACH_UNCOMPRESS_H
+#define __MACH_UNCOMPRESS_H
+
+#define putc(c)
+#define flush()
+#define arch_decomp_setup()
+#define arch_decomp_wdog()
+
+#endif
diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c
new file mode 100644
index 0000000..022c233
--- /dev/null
+++ b/arch/arm/mach-socfpga/socfpga.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2012 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/>.
+ */
+#include <linux/dw_apb_timer.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/hardware/gic.h>
+#include <asm/mach/arch.h>
+
+#include "common.h"
+
+const static struct of_device_id irq_match[] = {
+ { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+ {}
+};
+
+static void __init gic_init_irq(void)
+{
+ of_irq_init(irq_match);
+}
+
+static void socfpga_cyclone5_restart(char mode, const char *cmd)
+{
+ /* TODO: */
+}
+
+static void __init socfpga_cyclone5_init(void)
+{
+ l2x0_of_init(0, ~0UL);
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+ socfpga_init_clocks();
+}
+
+static const char *altera_dt_match[] = {
+ "altr,socfpga",
+ "altr,socfpga-cyclone5",
+ NULL
+};
+
+DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
+ .init_irq = gic_init_irq,
+ .handle_irq = gic_handle_irq,
+ .timer = &dw_apb_timer,
+ .init_machine = socfpga_cyclone5_init,
+ .restart = socfpga_cyclone5_restart,
+ .dt_compat = altera_dt_match,
+MACHINE_END
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index b9a5158..96014e8 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -4,4 +4,5 @@ obj-$(CONFIG_COMMON_CLK) += clk.o clk-fixed-rate.o clk-gate.o \
clk-mux.o clk-divider.o clk-fixed-factor.o
# SoCs specific
obj-$(CONFIG_ARCH_MXS) += mxs/
+obj-$(CONFIG_ARCH_SOCFPGA) += socfpga/
obj-$(CONFIG_PLAT_SPEAR) += spear/
diff --git a/drivers/clk/socfpga/Makefile b/drivers/clk/socfpga/Makefile
new file mode 100644
index 0000000..0303c0b
--- /dev/null
+++ b/drivers/clk/socfpga/Makefile
@@ -0,0 +1 @@
+obj-y += clk.o
diff --git a/drivers/clk/socfpga/clk.c b/drivers/clk/socfpga/clk.c
new file mode 100644
index 0000000..fcd71aa
--- /dev/null
+++ b/drivers/clk/socfpga/clk.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2012 Altera Corporation <www.altera.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.
+ *
+ * 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/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+
+#define SOCFPGA_MPU_PERIHCLK_FREQ_HZ (800000000 / 4)
+#define SOCFPGA_L4_MAIN_CLK (400000000)
+
+struct clk {
+ unsigned long rate;
+};
+
+static struct clk apb_pclk = { .rate = 200000000};
+static struct clk i2c_clk = { .rate = 100000000};
+static struct clk spim_clk = { .rate = 100000000};
+static struct clk mpu_pclk = { .rate = SOCFPGA_MPU_PERIHCLK_FREQ_HZ};
+static struct clk l4_main_clk = { .rate = SOCFPGA_L4_MAIN_CLK};
+
+static struct clk_lookup lookups[] = {
+ { .clk = &apb_pclk, .con_id = "apb_pclk", },
+ { .clk = &i2c_clk, .dev_id = "ffc04000.i2c", },
+ { .clk = &i2c_clk, .dev_id = "ffc05000.i2c", },
+ { .clk = &spim_clk, .dev_id = "dw-spi-mmio.0", },
+ { .clk = &spim_clk, .dev_id = "dw-spi-mmio.1", },
+ { .clk = &mpu_pclk, .dev_id = "smp_twd", },
+ { .clk = &l4_main_clk, .dev_id = "dma-pl330", },
+};
+
+void __init socfpga_init_clocks(void)
+{
+ clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+}
--
1.7.9.5
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