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picoxcell: support for Picochip picoxcell devices

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picoXcell is a family of femtocell devices with an ARM application
processor and picoArray DSP processor array.

This patch adds support for picoXcell boards to be booted using the
device tree registering the VIC's, UART's and timers.

v3:	- fixup vic compatible string in binding
v2:	- cleanup empty mach headers
	- convert to of_platform_populate()
	- simplify uncompress.h
	- split vic node into 2 devices
	- add missing __initconst attributes

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
This commit is contained in:
Jamie Iles 2011-07-25 17:36:42 +01:00
parent c6a389f123
commit af75655c06
22 changed files with 584 additions and 0 deletions
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24
Documentation/devicetree/bindings/arm/picoxcell.txt Normal file
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@ -0,0 +1,24 @@
Picochip picoXcell device tree bindings.
========================================
Required root node properties:
- compatible:
- "picochip,pc7302-pc3x3" : PC7302 development board with PC3X3 device.
- "picochip,pc7302-pc3x2" : PC7302 development board with PC3X2 device.
- "picochip,pc3x3" : picoXcell PC3X3 device based board.
- "picochip,pc3x2" : picoXcell PC3X2 device based board.
Timers required properties:
- compatible = "picochip,pc3x2-timer"
- interrupts : The single IRQ line for the timer.
- clock-freq : The frequency in HZ of the timer.
- reg : The register bank for the timer.
Note: two timers are required - one for the scheduler clock and one for the
event tick/NOHZ.
VIC required properties:
- compatible = "arm,pl192-vic".
- interrupt-controller.
- reg : The register bank for the device.
- #interrupt-cells : Must be 1.

18
arch/arm/Kconfig
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@ -608,6 +608,24 @@ config ARCH_TEGRA
This enables support for NVIDIA Tegra based systems (Tegra APX,
Tegra 6xx and Tegra 2 series).
config ARCH_PICOXCELL
bool "Picochip picoXcell"
select ARCH_REQUIRE_GPIOLIB
select ARM_PATCH_PHYS_VIRT
select ARM_VIC
select CPU_V6K
select DW_APB_TIMER
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
select HAVE_SCHED_CLOCK
select HAVE_TCM
select NO_IOPORT
select USE_OF
help
This enables support for systems based on the Picochip picoXcell
family of Femtocell devices. The picoxcell support requires device tree
for all boards.
config ARCH_PNX4008
bool "Philips Nexperia PNX4008 Mobile"
select CPU_ARM926T

1
arch/arm/Makefile
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@ -167,6 +167,7 @@ machine-$(CONFIG_ARCH_OMAP2) := omap2
machine-$(CONFIG_ARCH_OMAP3) := omap2
machine-$(CONFIG_ARCH_OMAP4) := omap2
machine-$(CONFIG_ARCH_ORION5X) := orion5x
machine-$(CONFIG_ARCH_PICOXCELL) := picoxcell
machine-$(CONFIG_ARCH_PNX4008) := pnx4008
machine-$(CONFIG_ARCH_PRIMA2) := prima2
machine-$(CONFIG_ARCH_PXA) := pxa

3
arch/arm/mach-picoxcell/Makefile Normal file
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@ -0,0 +1,3 @@
obj-y := common.o
obj-y += time.o
obj-y += io.o

1
arch/arm/mach-picoxcell/Makefile.boot Normal file
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@ -0,0 +1 @@
zreladdr-y := 0x00008000

55
arch/arm/mach-picoxcell/common.c Normal file
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@ -0,0 +1,55 @@
/*
* 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/irq.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <asm/mach/arch.h>
#include <asm/hardware/vic.h>
#include <mach/map.h>
#include <mach/picoxcell_soc.h>
#include "common.h"
static void __init picoxcell_init_machine(void)
{
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
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" },
{ /* Sentinel */ }
};
static void __init picoxcell_init_irq(void)
{
vic_init(IO_ADDRESS(PICOXCELL_VIC0_BASE), 0, ~0, 0);
vic_init(IO_ADDRESS(PICOXCELL_VIC1_BASE), 32, ~0, 0);
irq_domain_generate_simple(vic_of_match, PICOXCELL_VIC0_BASE, 0);
irq_domain_generate_simple(vic_of_match, PICOXCELL_VIC1_BASE, 32);
}
DT_MACHINE_START(PICOXCELL, "Picochip picoXcell")
.map_io = picoxcell_map_io,
.nr_irqs = ARCH_NR_IRQS,
.init_irq = picoxcell_init_irq,
.timer = &picoxcell_timer,
.init_machine = picoxcell_init_machine,
.dt_compat = picoxcell_dt_match,
MACHINE_END

18
arch/arm/mach-picoxcell/common.h Normal file
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@ -0,0 +1,18 @@
/*
* 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;
extern void picoxcell_map_io(void);
#endif /* __PICOXCELL_COMMON_H__ */

35
arch/arm/mach-picoxcell/include/mach/debug-macro.S Normal file
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@ -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
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

19
arch/arm/mach-picoxcell/include/mach/entry-macro.S Normal file
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@ -0,0 +1,19 @@
/*
* 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.
*/
#include <mach/hardware.h>
#include <mach/irqs.h>
#include <mach/map.h>
#define VA_VIC0 IO_ADDRESS(PICOXCELL_VIC0_BASE)
#define VA_VIC1 IO_ADDRESS(PICOXCELL_VIC1_BASE)
#include <asm/entry-macro-vic2.S>

1
arch/arm/mach-picoxcell/include/mach/gpio.h Normal file
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@ -0,0 +1 @@
/* empty */

21
arch/arm/mach-picoxcell/include/mach/hardware.h Normal file
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@ -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

29
arch/arm/mach-picoxcell/include/mach/io.h Normal file
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@ -0,0 +1,29 @@
/*
* 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)
#define __arch_ioremap picoxcell_ioremap
#define __arch_iounmap picoxcell_iounmap
extern void __iomem *picoxcell_ioremap(unsigned long phys, size_t size,
unsigned int type);
extern void picoxcell_iounmap(volatile void __iomem *addr);
#endif /* __ASM_ARM_ARCH_IO_H */

25
arch/arm/mach-picoxcell/include/mach/irqs.h Normal file
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@ -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 __MACH_IRQS_H
#define __MACH_IRQS_H
#define ARCH_NR_IRQS 64
#define NR_IRQS (128 + ARCH_NR_IRQS)
#define IRQ_VIC0_BASE 0
#define IRQ_VIC1_BASE 32
#endif /* __MACH_IRQS_H */

25
arch/arm/mach-picoxcell/include/mach/map.h Normal file
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@ -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__ */

1
arch/arm/mach-picoxcell/include/mach/memory.h Normal file
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@ -0,0 +1 @@
/* empty */

25
arch/arm/mach-picoxcell/include/mach/picoxcell_soc.h Normal file
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@ -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__ */

31
arch/arm/mach-picoxcell/include/mach/system.h Normal file
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@ -0,0 +1,31 @@
/*
* 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();
}
static inline void arch_reset(int mode, const char *cmd)
{
/* Watchdog reset to go here. */
}
#endif /* __ASM_ARCH_SYSTEM_H */

25
arch/arm/mach-picoxcell/include/mach/timex.h Normal file
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@ -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__ */

21
arch/arm/mach-picoxcell/include/mach/uncompress.h Normal file
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@ -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()

18
arch/arm/mach-picoxcell/include/mach/vmalloc.h Normal file
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@ -0,0 +1,18 @@
/*
* 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 VMALLOC_END 0xFE000000UL

56
arch/arm/mach-picoxcell/io.c Normal file
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/*
* 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/io.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of.h>
#include <asm/mach/map.h>
#include <mach/map.h>
#include <mach/picoxcell_soc.h>
#include "common.h"
void __init picoxcell_map_io(void)
{
struct map_desc io_map = {
.virtual = PHYS_TO_IO(PICOXCELL_PERIPH_BASE),
.pfn = __phys_to_pfn(PICOXCELL_PERIPH_BASE),
.length = PICOXCELL_PERIPH_LENGTH,
.type = MT_DEVICE,
};
iotable_init(&io_map, 1);
}
void __iomem *picoxcell_ioremap(unsigned long p, size_t size,
unsigned int type)
{
if (unlikely(size == 0))
return NULL;
if (p >= PICOXCELL_PERIPH_BASE &&
p < PICOXCELL_PERIPH_BASE + PICOXCELL_PERIPH_LENGTH)
return IO_ADDRESS(p);
return __arm_ioremap_caller(p, size, type,
__builtin_return_address(0));
}
EXPORT_SYMBOL_GPL(picoxcell_ioremap);
void picoxcell_iounmap(volatile void __iomem *addr)
{
unsigned long virt = (unsigned long)addr;
if (virt >= VMALLOC_START && virt < VMALLOC_END)
__iounmap(addr);
}
EXPORT_SYMBOL_GPL(picoxcell_iounmap);

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arch/arm/mach-picoxcell/time.c Normal file
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/*
* 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 <linux/sched.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 DEFINE_CLOCK_DATA(cd);
static void __iomem *sched_io_base;
unsigned long long notrace sched_clock(void)
{
cycle_t cyc = sched_io_base ? __raw_readl(sched_io_base) : 0;
return cyc_to_sched_clock(&cd, cyc, (u32)~0);
}
static void notrace picoxcell_update_sched_clock(void)
{
cycle_t cyc = sched_io_base ? __raw_readl(sched_io_base) : 0;
update_sched_clock(&cd, cyc, (u32)~0);
}
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);
init_sched_clock(&cd, picoxcell_update_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,
};