diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/Kconfig | 4 | ||||
| -rw-r--r-- | arch/mips/cobalt/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/cobalt/setup.c | 24 | ||||
| -rw-r--r-- | arch/mips/cobalt/time.c | 35 | ||||
| -rw-r--r-- | arch/mips/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/cevt-gt641xx.c | 144 |
6 files changed, 188 insertions, 22 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 3ecff5e9e4f..61262c5f9c6 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -66,6 +66,7 @@ config BCM47XX config MIPS_COBALT bool "Cobalt Server" select CEVT_R4K + select CEVT_GT641XX select DMA_NONCOHERENT select HW_HAS_PCI select I8253 @@ -729,6 +730,9 @@ config ARCH_MAY_HAVE_PC_FDC config BOOT_RAW bool +config CEVT_GT641XX + bool + config CEVT_R4K bool diff --git a/arch/mips/cobalt/Makefile b/arch/mips/cobalt/Makefile index 6b83f4ddc8f..d73833b7c78 100644 --- a/arch/mips/cobalt/Makefile +++ b/arch/mips/cobalt/Makefile @@ -2,7 +2,7 @@ # Makefile for the Cobalt micro systems family specific parts of the kernel # -obj-y := buttons.o irq.o led.o reset.o rtc.o serial.o setup.o +obj-y := buttons.o irq.o led.o reset.o rtc.o serial.o setup.o time.o obj-$(CONFIG_PCI) += pci.o obj-$(CONFIG_EARLY_PRINTK) += console.o diff --git a/arch/mips/cobalt/setup.c b/arch/mips/cobalt/setup.c index d11bb1bc7b6..dd23beb8604 100644 --- a/arch/mips/cobalt/setup.c +++ b/arch/mips/cobalt/setup.c @@ -9,19 +9,17 @@ * Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv) * */ -#include <linux/interrupt.h> #include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/ioport.h> #include <linux/pm.h> #include <asm/bootinfo.h> -#include <asm/time.h> -#include <asm/i8253.h> -#include <asm/io.h> #include <asm/reboot.h> #include <asm/gt64120.h> #include <cobalt.h> -#include <irq.h> extern void cobalt_machine_restart(char *command); extern void cobalt_machine_halt(void); @@ -41,17 +39,6 @@ const char *get_system_type(void) return "MIPS Cobalt"; } -void __init plat_timer_setup(struct irqaction *irq) -{ - /* Load timer value for HZ (TCLK is 50MHz) */ - GT_WRITE(GT_TC0_OFS, 50*1000*1000 / HZ); - - /* Enable timer0 */ - GT_WRITE(GT_TC_CONTROL_OFS, GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK); - - setup_irq(GT641XX_TIMER0_IRQ, irq); -} - /* * Cobalt doesn't have PS/2 keyboard/mouse interfaces, * keyboard conntroller is never used. @@ -84,11 +71,6 @@ static struct resource cobalt_reserved_resources[] = { }, }; -void __init plat_time_init(void) -{ - setup_pit_timer(); -} - void __init plat_mem_setup(void) { int i; diff --git a/arch/mips/cobalt/time.c b/arch/mips/cobalt/time.c new file mode 100644 index 00000000000..fa819fccd5d --- /dev/null +++ b/arch/mips/cobalt/time.c @@ -0,0 +1,35 @@ +/* + * Cobalt time initialization. + * + * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include <linux/init.h> + +#include <asm/gt64120.h> +#include <asm/i8253.h> +#include <asm/time.h> + +#define GT641XX_BASE_CLOCK 50000000 /* 50MHz */ + +void __init plat_time_init(void) +{ + setup_pit_timer(); + + gt641xx_set_base_clock(GT641XX_BASE_CLOCK); + + mips_timer_state = gt641xx_timer0_state; +} diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index a3afa39faae..d7745c8976f 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -9,6 +9,7 @@ obj-y += cpu-probe.o branch.o entry.o genex.o irq.o process.o \ time.o topology.o traps.o unaligned.o obj-$(CONFIG_CEVT_R4K) += cevt-r4k.o +obj-$(CONFIG_CEVT_GT641XX) += cevt-gt641xx.o binfmt_irix-objs := irixelf.o irixinv.o irixioctl.o irixsig.o \ irix5sys.o sysirix.o diff --git a/arch/mips/kernel/cevt-gt641xx.c b/arch/mips/kernel/cevt-gt641xx.c new file mode 100644 index 00000000000..4c651b2680f --- /dev/null +++ b/arch/mips/kernel/cevt-gt641xx.c @@ -0,0 +1,144 @@ +/* + * GT641xx clockevent routines. + * + * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include <linux/clockchips.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> + +#include <asm/gt64120.h> +#include <asm/time.h> + +#include <irq.h> + +static DEFINE_SPINLOCK(gt641xx_timer_lock); +static unsigned int gt641xx_base_clock; + +void gt641xx_set_base_clock(unsigned int clock) +{ + gt641xx_base_clock = clock; +} + +int gt641xx_timer0_state(void) +{ + if (GT_READ(GT_TC0_OFS)) + return 0; + + GT_WRITE(GT_TC0_OFS, gt641xx_base_clock / HZ); + GT_WRITE(GT_TC_CONTROL_OFS, GT_TC_CONTROL_ENTC0_MSK); + + return 1; +} + +static int gt641xx_timer0_set_next_event(unsigned long delta, + struct clock_event_device *evt) +{ + unsigned long flags; + u32 ctrl; + + spin_lock_irqsave(>641xx_timer_lock, flags); + + ctrl = GT_READ(GT_TC_CONTROL_OFS); + ctrl &= ~(GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK); + ctrl |= GT_TC_CONTROL_ENTC0_MSK; + + GT_WRITE(GT_TC0_OFS, delta); + GT_WRITE(GT_TC_CONTROL_OFS, ctrl); + + spin_unlock_irqrestore(>641xx_timer_lock, flags); + + return 0; +} + +static void gt641xx_timer0_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ + unsigned long flags; + u32 ctrl; + + spin_lock_irqsave(>641xx_timer_lock, flags); + + ctrl = GT_READ(GT_TC_CONTROL_OFS); + ctrl &= ~(GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK); + + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: + ctrl |= GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK; + break; + case CLOCK_EVT_MODE_ONESHOT: + ctrl |= GT_TC_CONTROL_ENTC0_MSK; + break; + default: + break; + } + + GT_WRITE(GT_TC_CONTROL_OFS, ctrl); + + spin_unlock_irqrestore(>641xx_timer_lock, flags); +} + +static void gt641xx_timer0_event_handler(struct clock_event_device *dev) +{ +} + +static struct clock_event_device gt641xx_timer0_clockevent = { + .name = "gt641xx-timer0", + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .cpumask = CPU_MASK_CPU0, + .irq = GT641XX_TIMER0_IRQ, + .set_next_event = gt641xx_timer0_set_next_event, + .set_mode = gt641xx_timer0_set_mode, + .event_handler = gt641xx_timer0_event_handler, +}; + +static irqreturn_t gt641xx_timer0_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *cd = >641xx_timer0_clockevent; + + cd->event_handler(cd); + + return IRQ_HANDLED; +} + +static struct irqaction gt641xx_timer0_irqaction = { + .handler = gt641xx_timer0_interrupt, + .flags = IRQF_DISABLED | IRQF_PERCPU, + .name = "gt641xx_timer0", +}; + +static int __init gt641xx_timer0_clockevent_init(void) +{ + struct clock_event_device *cd; + + if (!gt641xx_base_clock) + return 0; + + GT_WRITE(GT_TC0_OFS, gt641xx_base_clock / HZ); + + cd = >641xx_timer0_clockevent; + cd->rating = 200 + gt641xx_base_clock / 10000000; + cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd); + cd->min_delta_ns = clockevent_delta2ns(0x300, cd); + clockevent_set_clock(cd, gt641xx_base_clock); + + clockevents_register_device(>641xx_timer0_clockevent); + + return setup_irq(GT641XX_TIMER0_IRQ, >641xx_timer0_irqaction); +} +arch_initcall(gt641xx_timer0_clockevent_init); |