16 files changed, 482 insertions, 0 deletions
diff --git a/arch/arm/mach-picoxcell/Makefile b/arch/arm/mach-picoxcell/Makefile
new file mode 100644
index 000000000000..e5ec4a8d9bcb
--- /dev/null
+++ b/arch/arm/mach-picoxcell/Makefile
@@ -0,0 +1,2 @@
+obj-y	:= common.o
+obj-y	+= time.o
diff --git a/arch/arm/mach-picoxcell/Makefile.boot b/arch/arm/mach-picoxcell/Makefile.boot
new file mode 100644
index 000000000000..b3271754e9fd
--- /dev/null
+++ b/arch/arm/mach-picoxcell/Makefile.boot
@@ -0,0 +1 @@
+zreladdr-y := 0x00008000
diff --git a/arch/arm/mach-picoxcell/common.c b/arch/arm/mach-picoxcell/common.c
new file mode 100644
index 000000000000..a2e8ae8b5821
--- /dev/null
+++ b/arch/arm/mach-picoxcell/common.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ *
+ * All enquiries to support@picochip.com
+ */
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+#include <asm/hardware/vic.h>
+#include <asm/mach/map.h>
+
+#include <mach/map.h>
+#include <mach/picoxcell_soc.h>
+
+#include "common.h"
+
+#define WDT_CTRL_REG_EN_MASK	(1 << 0)
+#define WDT_CTRL_REG_OFFS	(0x00)
+#define WDT_TIMEOUT_REG_OFFS	(0x04)
+static void __iomem *wdt_regs;
+
+/*
+ * The machine restart method can be called from an atomic context so we won't
+ * be able to ioremap the regs then.
+ */
+static void picoxcell_setup_restart(void)
+{
+	struct device_node *np = of_find_compatible_node(NULL, NULL,
+							 "snps,dw-apb-wdg");
+	if (WARN(!np, "unable to setup watchdog restart"))
+		return;
+
+	wdt_regs = of_iomap(np, 0);
+	WARN(!wdt_regs, "failed to remap watchdog regs");
+}
+
+static struct map_desc io_map __initdata = {
+	.virtual	= PHYS_TO_IO(PICOXCELL_PERIPH_BASE),
+	.pfn		= __phys_to_pfn(PICOXCELL_PERIPH_BASE),
+	.length		= PICOXCELL_PERIPH_LENGTH,
+	.type		= MT_DEVICE,
+};
+
+static void __init picoxcell_map_io(void)
+{
+	iotable_init(&io_map, 1);
+}
+
+static void __init picoxcell_init_machine(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+	picoxcell_setup_restart();
+}
+
+static const char *picoxcell_dt_match[] = {
+	"picochip,pc3x2",
+	"picochip,pc3x3",
+	NULL
+};
+
+static const struct of_device_id vic_of_match[] __initconst = {
+	{ .compatible = "arm,pl192-vic", .data = vic_of_init, },
+	{ /* Sentinel */ }
+};
+
+static void __init picoxcell_init_irq(void)
+{
+	of_irq_init(vic_of_match);
+}
+
+static void picoxcell_wdt_restart(char mode, const char *cmd)
+{
+	/*
+	 * Configure the watchdog to reset with the shortest possible timeout
+	 * and give it chance to do the reset.
+	 */
+	if (wdt_regs) {
+		writel_relaxed(WDT_CTRL_REG_EN_MASK, wdt_regs + WDT_CTRL_REG_OFFS);
+		writel_relaxed(0, wdt_regs + WDT_TIMEOUT_REG_OFFS);
+		/* No sleeping, possibly atomic. */
+		mdelay(500);
+	}
+}
+
+DT_MACHINE_START(PICOXCELL, "Picochip picoXcell")
+	.map_io		= picoxcell_map_io,
+	.nr_irqs	= NR_IRQS_LEGACY,
+	.init_irq	= picoxcell_init_irq,
+	.handle_irq	= vic_handle_irq,
+	.timer		= &picoxcell_timer,
+	.init_machine	= picoxcell_init_machine,
+	.dt_compat	= picoxcell_dt_match,
+	.restart	= picoxcell_wdt_restart,
+MACHINE_END
diff --git a/arch/arm/mach-picoxcell/common.h b/arch/arm/mach-picoxcell/common.h
new file mode 100644
index 000000000000..83d55ab956a4
--- /dev/null
+++ b/arch/arm/mach-picoxcell/common.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ *
+ * All enquiries to support@picochip.com
+ */
+#ifndef __PICOXCELL_COMMON_H__
+#define __PICOXCELL_COMMON_H__
+
+#include <asm/mach/time.h>
+
+extern struct sys_timer picoxcell_timer;
+
+#endif /* __PICOXCELL_COMMON_H__ */
diff --git a/arch/arm/mach-picoxcell/include/mach/debug-macro.S b/arch/arm/mach-picoxcell/include/mach/debug-macro.S
new file mode 100644
index 000000000000..58d4ee3ae949
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/debug-macro.S
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ *
+ * Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
+ * accesses to the 8250.
+ */
+#include <linux/serial_reg.h>
+#include <mach/hardware.h>
+#include <mach/map.h>
+
+#define UART_SHIFT 2
+
+		.macro	addruart, rp, rv, tmp
+		ldr	\rv, =PHYS_TO_IO(PICOXCELL_UART1_BASE)
+		ldr	\rp, =PICOXCELL_UART1_BASE
+		.endm
+
+		.macro	senduart,rd,rx
+		str	\rd, [\rx, #UART_TX << UART_SHIFT]
+		.endm
+
+		.macro	busyuart,rd,rx
+1002:		ldr	\rd, [\rx, #UART_LSR << UART_SHIFT]
+		and	\rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
+		teq	\rd, #UART_LSR_TEMT | UART_LSR_THRE
+		bne	1002b
+		.endm
+
+		/* The UART's don't have any flow control IO's wired up. */
+		.macro	waituart,rd,rx
+		.endm
diff --git a/arch/arm/mach-picoxcell/include/mach/entry-macro.S b/arch/arm/mach-picoxcell/include/mach/entry-macro.S
new file mode 100644
index 000000000000..9b505ac00be9
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/entry-macro.S
@@ -0,0 +1,16 @@
+/*
+ * entry-macro.S
+ *
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * Low-level IRQ helper macros for picoXcell platforms
+ *
+ * This file is licensed under  the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+	.macro  disable_fiq
+	.endm
+
+	.macro  arch_ret_to_user, tmp1, tmp2
+	.endm
diff --git a/arch/arm/mach-picoxcell/include/mach/gpio.h b/arch/arm/mach-picoxcell/include/mach/gpio.h
new file mode 100644
index 000000000000..40a8c178f10d
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/gpio.h
@@ -0,0 +1 @@
+/* empty */
diff --git a/arch/arm/mach-picoxcell/include/mach/hardware.h b/arch/arm/mach-picoxcell/include/mach/hardware.h
new file mode 100644
index 000000000000..70ff58192ec9
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/hardware.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * This file contains the hardware definitions of the picoXcell SoC devices.
+ *
+ * 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.
+ */
+#ifndef __ASM_ARCH_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+#include <mach/picoxcell_soc.h>
+
+#endif
diff --git a/arch/arm/mach-picoxcell/include/mach/io.h b/arch/arm/mach-picoxcell/include/mach/io.h
new file mode 100644
index 000000000000..7573ec7d10a3
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/io.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ */
+#ifndef __ASM_ARM_ARCH_IO_H
+#define __ASM_ARM_ARCH_IO_H
+
+/* No ioports, but needed for driver compatibility. */
+#define __io(a)			__typesafe_io(a)
+/* No PCI possible on picoxcell. */
+#define __mem_pci(a)		(a)
+
+#endif /* __ASM_ARM_ARCH_IO_H */
diff --git a/arch/arm/mach-picoxcell/include/mach/irqs.h b/arch/arm/mach-picoxcell/include/mach/irqs.h
new file mode 100644
index 000000000000..59eac1ee2820
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/irqs.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ */
+#ifndef __MACH_IRQS_H
+#define __MACH_IRQS_H
+
+/* We dynamically allocate our irq_desc's. */
+#define NR_IRQS				0
+
+#endif /* __MACH_IRQS_H */
diff --git a/arch/arm/mach-picoxcell/include/mach/map.h b/arch/arm/mach-picoxcell/include/mach/map.h
new file mode 100644
index 000000000000..c06afad218bb
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/map.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ */
+#ifndef __PICOXCELL_MAP_H__
+#define __PICOXCELL_MAP_H__
+
+#define PHYS_TO_IO(x)		(((x) & 0x00ffffff) | 0xfe000000)
+
+#ifdef __ASSEMBLY__
+#define IO_ADDRESS(x)		PHYS_TO_IO((x))
+#else
+#define IO_ADDRESS(x)		(void __iomem __force *)(PHYS_TO_IO((x)))
+#endif
+
+#endif /* __PICOXCELL_MAP_H__ */
diff --git a/arch/arm/mach-picoxcell/include/mach/picoxcell_soc.h b/arch/arm/mach-picoxcell/include/mach/picoxcell_soc.h
new file mode 100644
index 000000000000..5566fc88ddbc
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/picoxcell_soc.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * This file contains the hardware definitions of the picoXcell SoC devices.
+ *
+ * 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.
+ */
+#ifndef __PICOXCELL_SOC_H__
+#define __PICOXCELL_SOC_H__
+
+#define PICOXCELL_UART1_BASE		0x80230000
+#define PICOXCELL_PERIPH_BASE		0x80000000
+#define PICOXCELL_PERIPH_LENGTH		SZ_4M
+#define PICOXCELL_VIC0_BASE		0x80060000
+#define PICOXCELL_VIC1_BASE		0x80064000
+
+#endif /* __PICOXCELL_SOC_H__ */
diff --git a/arch/arm/mach-picoxcell/include/mach/system.h b/arch/arm/mach-picoxcell/include/mach/system.h
new file mode 100644
index 000000000000..1a5d8cb57df4
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/system.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ */
+#ifndef __ASM_ARCH_SYSTEM_H
+#define __ASM_ARCH_SYSTEM_H
+
+static inline void arch_idle(void)
+{
+	/*
+	 * This should do all the clock switching and wait for interrupt
+	 * tricks.
+	 */
+	cpu_do_idle();
+}
+
+#endif /* __ASM_ARCH_SYSTEM_H */
diff --git a/arch/arm/mach-picoxcell/include/mach/timex.h b/arch/arm/mach-picoxcell/include/mach/timex.h
new file mode 100644
index 000000000000..6c540a69f405
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/timex.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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
+ */
+#ifndef __TIMEX_H__
+#define __TIMEX_H__
+
+/* Bogus value to allow the kernel to compile. */
+#define CLOCK_TICK_RATE		1000000
+
+#endif /* __TIMEX_H__ */
+
diff --git a/arch/arm/mach-picoxcell/include/mach/uncompress.h b/arch/arm/mach-picoxcell/include/mach/uncompress.h
new file mode 100644
index 000000000000..b60b19d1d739
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/uncompress.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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 putc(c)
+#define flush()
+#define arch_decomp_setup()
+#define arch_decomp_wdog()
diff --git a/arch/arm/mach-picoxcell/time.c b/arch/arm/mach-picoxcell/time.c
new file mode 100644
index 000000000000..6c89cf8ab22e
--- /dev/null
+++ b/arch/arm/mach-picoxcell/time.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ *
+ * All enquiries to support@picochip.com
+ */
+#include <linux/dw_apb_timer.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include <asm/mach/time.h>
+#include <asm/sched_clock.h>
+
+#include "common.h"
+
+static void timer_get_base_and_rate(struct device_node *np,
+				    void __iomem **base, u32 *rate)
+{
+	*base = of_iomap(np, 0);
+
+	if (!*base)
+		panic("Unable to map regs for %s", np->name);
+
+	if (of_property_read_u32(np, "clock-freq", rate))
+		panic("No clock-freq property for %s", np->name);
+}
+
+static void picoxcell_add_clockevent(struct device_node *event_timer)
+{
+	void __iomem *iobase;
+	struct dw_apb_clock_event_device *ced;
+	u32 irq, rate;
+
+	irq = irq_of_parse_and_map(event_timer, 0);
+	if (irq == NO_IRQ)
+		panic("No IRQ for clock event timer");
+
+	timer_get_base_and_rate(event_timer, &iobase, &rate);
+
+	ced = dw_apb_clockevent_init(0, event_timer->name, 300, iobase, irq,
+				     rate);
+	if (!ced)
+		panic("Unable to initialise clockevent device");
+
+	dw_apb_clockevent_register(ced);
+}
+
+static void picoxcell_add_clocksource(struct device_node *source_timer)
+{
+	void __iomem *iobase;
+	struct dw_apb_clocksource *cs;
+	u32 rate;
+
+	timer_get_base_and_rate(source_timer, &iobase, &rate);
+
+	cs = dw_apb_clocksource_init(300, source_timer->name, iobase, rate);
+	if (!cs)
+		panic("Unable to initialise clocksource device");
+
+	dw_apb_clocksource_start(cs);
+	dw_apb_clocksource_register(cs);
+}
+
+static void __iomem *sched_io_base;
+
+unsigned u32 notrace picoxcell_read_sched_clock(void)
+{
+	return __raw_readl(sched_io_base);
+}
+
+static const struct of_device_id picoxcell_rtc_ids[] __initconst = {
+	{ .compatible = "picochip,pc3x2-rtc" },
+	{ /* Sentinel */ },
+};
+
+static void picoxcell_init_sched_clock(void)
+{
+	struct device_node *sched_timer;
+	u32 rate;
+
+	sched_timer = of_find_matching_node(NULL, picoxcell_rtc_ids);
+	if (!sched_timer)
+		panic("No RTC for sched clock to use");
+
+	timer_get_base_and_rate(sched_timer, &sched_io_base, &rate);
+	of_node_put(sched_timer);
+
+	setup_sched_clock(picoxcell_read_sched_clock, 32, rate);
+}
+
+static const struct of_device_id picoxcell_timer_ids[] __initconst = {
+	{ .compatible = "picochip,pc3x2-timer" },
+	{},
+};
+
+static void __init picoxcell_timer_init(void)
+{
+	struct device_node *event_timer, *source_timer;
+
+	event_timer = of_find_matching_node(NULL, picoxcell_timer_ids);
+	if (!event_timer)
+		panic("No timer for clockevent");
+	picoxcell_add_clockevent(event_timer);
+
+	source_timer = of_find_matching_node(event_timer, picoxcell_timer_ids);
+	if (!source_timer)
+		panic("No timer for clocksource");
+	picoxcell_add_clocksource(source_timer);
+
+	of_node_put(source_timer);
+
+	picoxcell_init_sched_clock();
+}
+
+struct sys_timer picoxcell_timer = {
+	.init = picoxcell_timer_init,
+};