diff options
Diffstat (limited to 'arch/arm/mach-picoxcell')
19 files changed, 541 insertions, 0 deletions
diff --git a/arch/arm/mach-picoxcell/Makefile b/arch/arm/mach-picoxcell/Makefile new file mode 100644 index 000000000000..c550b6363488 --- /dev/null +++ b/arch/arm/mach-picoxcell/Makefile @@ -0,0 +1,3 @@ +obj-y := common.o +obj-y += time.o +obj-y += io.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..34d08347be5f --- /dev/null +++ b/arch/arm/mach-picoxcell/common.c @@ -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 diff --git a/arch/arm/mach-picoxcell/common.h b/arch/arm/mach-picoxcell/common.h new file mode 100644 index 000000000000..5263f0fa095c --- /dev/null +++ b/arch/arm/mach-picoxcell/common.h @@ -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__ */ 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..8f2c234ed9d9 --- /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 + 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..a6b09f75d9df --- /dev/null +++ b/arch/arm/mach-picoxcell/include/mach/entry-macro.S @@ -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> 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..a863b0f6eeec --- /dev/null +++ b/arch/arm/mach-picoxcell/include/mach/io.h @@ -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 */ 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..4d13ed970919 --- /dev/null +++ b/arch/arm/mach-picoxcell/include/mach/irqs.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 __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 */ 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/memory.h b/arch/arm/mach-picoxcell/include/mach/memory.h new file mode 100644 index 000000000000..40a8c178f10d --- /dev/null +++ b/arch/arm/mach-picoxcell/include/mach/memory.h @@ -0,0 +1 @@ +/* empty */ 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..67c589b0c1bc --- /dev/null +++ b/arch/arm/mach-picoxcell/include/mach/system.h @@ -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 */ 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/include/mach/vmalloc.h b/arch/arm/mach-picoxcell/include/mach/vmalloc.h new file mode 100644 index 000000000000..62559e30888a --- /dev/null +++ b/arch/arm/mach-picoxcell/include/mach/vmalloc.h @@ -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 diff --git a/arch/arm/mach-picoxcell/io.c b/arch/arm/mach-picoxcell/io.c new file mode 100644 index 000000000000..935a2fae62e6 --- /dev/null +++ b/arch/arm/mach-picoxcell/io.c @@ -0,0 +1,56 @@ +/* + * 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); diff --git a/arch/arm/mach-picoxcell/time.c b/arch/arm/mach-picoxcell/time.c new file mode 100644 index 000000000000..90a554ff4499 --- /dev/null +++ b/arch/arm/mach-picoxcell/time.c @@ -0,0 +1,132 @@ +/* + * 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, +}; |