diff options
Diffstat (limited to 'arch/arm/mach-ks8695')
| -rw-r--r-- | arch/arm/mach-ks8695/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-ks8695/cpu.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-ks8695/devices.c | 21 | ||||
| -rw-r--r-- | arch/arm/mach-ks8695/include/mach/devices.h | 5 | ||||
| -rw-r--r-- | arch/arm/mach-ks8695/include/mach/hardware.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-ks8695/include/mach/regs-timer.h | 40 | ||||
| -rw-r--r-- | arch/arm/mach-ks8695/include/mach/uncompress.h | 6 | ||||
| -rw-r--r-- | arch/arm/mach-ks8695/leds.c | 92 | ||||
| -rw-r--r-- | arch/arm/mach-ks8695/time.c | 133 |
9 files changed, 95 insertions, 209 deletions
diff --git a/arch/arm/mach-ks8695/Makefile b/arch/arm/mach-ks8695/Makefile index 50980e6..e370caf 100644 --- a/arch/arm/mach-ks8695/Makefile +++ b/arch/arm/mach-ks8695/Makefile @@ -11,9 +11,6 @@ obj- := # PCI support is optional obj-$(CONFIG_PCI) += pci.o -# LEDs -obj-$(CONFIG_LEDS) += leds.o - # Board-specific support obj-$(CONFIG_MACH_KS8695) += board-micrel.o obj-$(CONFIG_MACH_DSM320) += board-dsm320.o diff --git a/arch/arm/mach-ks8695/cpu.c b/arch/arm/mach-ks8695/cpu.c index 7f3f240..ddb2422 100644 --- a/arch/arm/mach-ks8695/cpu.c +++ b/arch/arm/mach-ks8695/cpu.c @@ -36,7 +36,7 @@ static struct __initdata map_desc ks8695_io_desc[] = { { - .virtual = KS8695_IO_VA, + .virtual = (unsigned long)KS8695_IO_VA, .pfn = __phys_to_pfn(KS8695_IO_PA), .length = KS8695_IO_SIZE, .type = MT_DEVICE, diff --git a/arch/arm/mach-ks8695/devices.c b/arch/arm/mach-ks8695/devices.c index 73bd638..47399bc 100644 --- a/arch/arm/mach-ks8695/devices.c +++ b/arch/arm/mach-ks8695/devices.c @@ -182,27 +182,6 @@ static void __init ks8695_add_device_watchdog(void) } -/* -------------------------------------------------------------------- - * LEDs - * -------------------------------------------------------------------- */ - -#if defined(CONFIG_LEDS) -short ks8695_leds_cpu = -1; -short ks8695_leds_timer = -1; - -void __init ks8695_init_leds(u8 cpu_led, u8 timer_led) -{ - /* Enable GPIO to access the LEDs */ - gpio_direction_output(cpu_led, 1); - gpio_direction_output(timer_led, 1); - - ks8695_leds_cpu = cpu_led; - ks8695_leds_timer = timer_led; -} -#else -void __init ks8695_init_leds(u8 cpu_led, u8 timer_led) {} -#endif - /* -------------------------------------------------------------------- */ /* diff --git a/arch/arm/mach-ks8695/include/mach/devices.h b/arch/arm/mach-ks8695/include/mach/devices.h index 85a3c9a..1e6594a 100644 --- a/arch/arm/mach-ks8695/include/mach/devices.h +++ b/arch/arm/mach-ks8695/include/mach/devices.h @@ -18,11 +18,6 @@ extern void __init ks8695_add_device_wan(void); extern void __init ks8695_add_device_lan(void); extern void __init ks8695_add_device_hpna(void); - /* LEDs */ -extern short ks8695_leds_cpu; -extern short ks8695_leds_timer; -extern void __init ks8695_init_leds(u8 cpu_led, u8 timer_led); - /* PCI */ #define KS8695_MODE_PCI 0 #define KS8695_MODE_MINIPCI 1 diff --git a/arch/arm/mach-ks8695/include/mach/hardware.h b/arch/arm/mach-ks8695/include/mach/hardware.h index 5e0c388..5090338 100644 --- a/arch/arm/mach-ks8695/include/mach/hardware.h +++ b/arch/arm/mach-ks8695/include/mach/hardware.h @@ -33,7 +33,7 @@ * head debug code as the initial MMU setup only deals in L1 sections. */ #define KS8695_IO_PA 0x03F00000 -#define KS8695_IO_VA 0xF0000000 +#define KS8695_IO_VA IOMEM(0xF0000000) #define KS8695_IO_SIZE SZ_1M #define KS8695_PCIMEM_PA 0x60000000 diff --git a/arch/arm/mach-ks8695/include/mach/regs-timer.h b/arch/arm/mach-ks8695/include/mach/regs-timer.h deleted file mode 100644 index e620cda..0000000 --- a/arch/arm/mach-ks8695/include/mach/regs-timer.h +++ /dev/null @@ -1,40 +0,0 @@ -/* - * arch/arm/mach-ks8695/include/mach/regs-timer.h - * - * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk> - * Copyright (C) 2006 Simtec Electronics - * - * KS8695 - Timer registers and bit definitions. - * - * 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. - */ - -#ifndef KS8695_TIMER_H -#define KS8695_TIMER_H - -#define KS8695_TMR_OFFSET (0xF0000 + 0xE400) -#define KS8695_TMR_VA (KS8695_IO_VA + KS8695_TMR_OFFSET) -#define KS8695_TMR_PA (KS8695_IO_PA + KS8695_TMR_OFFSET) - - -/* - * Timer registers - */ -#define KS8695_TMCON (0x00) /* Timer Control Register */ -#define KS8695_T1TC (0x04) /* Timer 1 Timeout Count Register */ -#define KS8695_T0TC (0x08) /* Timer 0 Timeout Count Register */ -#define KS8695_T1PD (0x0C) /* Timer 1 Pulse Count Register */ -#define KS8695_T0PD (0x10) /* Timer 0 Pulse Count Register */ - - -/* Timer Control Register */ -#define TMCON_T1EN (1 << 1) /* Timer 1 Enable */ -#define TMCON_T0EN (1 << 0) /* Timer 0 Enable */ - -/* Timer0 Timeout Counter Register */ -#define T0TC_WATCHDOG (0xff) /* Enable watchdog mode */ - - -#endif diff --git a/arch/arm/mach-ks8695/include/mach/uncompress.h b/arch/arm/mach-ks8695/include/mach/uncompress.h index 9495cb4..8879d61 100644 --- a/arch/arm/mach-ks8695/include/mach/uncompress.h +++ b/arch/arm/mach-ks8695/include/mach/uncompress.h @@ -19,15 +19,15 @@ static void putc(char c) { - while (!(__raw_readl(KS8695_UART_PA + KS8695_URLS) & URLS_URTHRE)) + while (!(__raw_readl((void __iomem*)KS8695_UART_PA + KS8695_URLS) & URLS_URTHRE)) barrier(); - __raw_writel(c, KS8695_UART_PA + KS8695_URTH); + __raw_writel(c, (void __iomem*)KS8695_UART_PA + KS8695_URTH); } static inline void flush(void) { - while (!(__raw_readl(KS8695_UART_PA + KS8695_URLS) & URLS_URTE)) + while (!(__raw_readl((void __iomem*)KS8695_UART_PA + KS8695_URLS) & URLS_URTE)) barrier(); } diff --git a/arch/arm/mach-ks8695/leds.c b/arch/arm/mach-ks8695/leds.c deleted file mode 100644 index 4bd7075..0000000 --- a/arch/arm/mach-ks8695/leds.c +++ /dev/null @@ -1,92 +0,0 @@ -/* - * LED driver for KS8695-based boards. - * - * Copyright (C) Andrew Victor - * - * 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. - */ -#include <linux/gpio.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> - -#include <asm/leds.h> -#include <mach/devices.h> - - -static inline void ks8695_led_on(unsigned int led) -{ - gpio_set_value(led, 0); -} - -static inline void ks8695_led_off(unsigned int led) -{ - gpio_set_value(led, 1); -} - -static inline void ks8695_led_toggle(unsigned int led) -{ - unsigned long is_off = gpio_get_value(led); - if (is_off) - ks8695_led_on(led); - else - ks8695_led_off(led); -} - - -/* - * Handle LED events. - */ -static void ks8695_leds_event(led_event_t evt) -{ - unsigned long flags; - - local_irq_save(flags); - - switch(evt) { - case led_start: /* System startup */ - ks8695_led_on(ks8695_leds_cpu); - break; - - case led_stop: /* System stop / suspend */ - ks8695_led_off(ks8695_leds_cpu); - break; - -#ifdef CONFIG_LEDS_TIMER - case led_timer: /* Every 50 timer ticks */ - ks8695_led_toggle(ks8695_leds_timer); - break; -#endif - -#ifdef CONFIG_LEDS_CPU - case led_idle_start: /* Entering idle state */ - ks8695_led_off(ks8695_leds_cpu); - break; - - case led_idle_end: /* Exit idle state */ - ks8695_led_on(ks8695_leds_cpu); - break; -#endif - - default: - break; - } - - local_irq_restore(flags); -} - - -static int __init leds_init(void) -{ - if ((ks8695_leds_timer == -1) || (ks8695_leds_cpu == -1)) - return -ENODEV; - - leds_event = ks8695_leds_event; - - leds_event(led_start); - return 0; -} - -__initcall(leds_init); diff --git a/arch/arm/mach-ks8695/time.c b/arch/arm/mach-ks8695/time.c index ec783a3..46c84bc 100644 --- a/arch/arm/mach-ks8695/time.c +++ b/arch/arm/mach-ks8695/time.c @@ -25,53 +25,98 @@ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/io.h> +#include <linux/clockchips.h> #include <asm/mach/time.h> #include <asm/system_misc.h> -#include <mach/regs-timer.h> #include <mach/regs-irq.h> #include "generic.h" +#define KS8695_TMR_OFFSET (0xF0000 + 0xE400) +#define KS8695_TMR_VA (KS8695_IO_VA + KS8695_TMR_OFFSET) +#define KS8695_TMR_PA (KS8695_IO_PA + KS8695_TMR_OFFSET) + /* - * Returns number of ms since last clock interrupt. Note that interrupts - * will have been disabled by do_gettimeoffset() + * Timer registers */ -static unsigned long ks8695_gettimeoffset (void) +#define KS8695_TMCON (0x00) /* Timer Control Register */ +#define KS8695_T1TC (0x04) /* Timer 1 Timeout Count Register */ +#define KS8695_T0TC (0x08) /* Timer 0 Timeout Count Register */ +#define KS8695_T1PD (0x0C) /* Timer 1 Pulse Count Register */ +#define KS8695_T0PD (0x10) /* Timer 0 Pulse Count Register */ + +/* Timer Control Register */ +#define TMCON_T1EN (1 << 1) /* Timer 1 Enable */ +#define TMCON_T0EN (1 << 0) /* Timer 0 Enable */ + +/* Timer0 Timeout Counter Register */ +#define T0TC_WATCHDOG (0xff) /* Enable watchdog mode */ + +static void ks8695_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) { - unsigned long elapsed, tick2, intpending; + u32 tmcon; - /* - * Get the current number of ticks. Note that there is a race - * condition between us reading the timer and checking for an - * interrupt. We solve this by ensuring that the counter has not - * reloaded between our two reads. - */ - elapsed = __raw_readl(KS8695_TMR_VA + KS8695_T1TC) + __raw_readl(KS8695_TMR_VA + KS8695_T1PD); - do { - tick2 = elapsed; - intpending = __raw_readl(KS8695_IRQ_VA + KS8695_INTST) & (1 << KS8695_IRQ_TIMER1); - elapsed = __raw_readl(KS8695_TMR_VA + KS8695_T1TC) + __raw_readl(KS8695_TMR_VA + KS8695_T1PD); - } while (elapsed > tick2); - - /* Convert to number of ticks expired (not remaining) */ - elapsed = (CLOCK_TICK_RATE / HZ) - elapsed; - - /* Is interrupt pending? If so, then timer has been reloaded already. */ - if (intpending) - elapsed += (CLOCK_TICK_RATE / HZ); - - /* Convert ticks to usecs */ - return (unsigned long)(elapsed * (tick_nsec / 1000)) / LATCH; + if (mode == CLOCK_EVT_FEAT_PERIODIC) { + u32 rate = DIV_ROUND_CLOSEST(KS8695_CLOCK_RATE, HZ); + u32 half = DIV_ROUND_CLOSEST(rate, 2); + + /* Disable timer 1 */ + tmcon = readl_relaxed(KS8695_TMR_VA + KS8695_TMCON); + tmcon &= ~TMCON_T1EN; + writel_relaxed(tmcon, KS8695_TMR_VA + KS8695_TMCON); + + /* Both registers need to count down */ + writel_relaxed(half, KS8695_TMR_VA + KS8695_T1TC); + writel_relaxed(half, KS8695_TMR_VA + KS8695_T1PD); + + /* Re-enable timer1 */ + tmcon |= TMCON_T1EN; + writel_relaxed(tmcon, KS8695_TMR_VA + KS8695_TMCON); + } } +static int ks8695_set_next_event(unsigned long cycles, + struct clock_event_device *evt) + +{ + u32 half = DIV_ROUND_CLOSEST(cycles, 2); + u32 tmcon; + + /* Disable timer 1 */ + tmcon = readl_relaxed(KS8695_TMR_VA + KS8695_TMCON); + tmcon &= ~TMCON_T1EN; + writel_relaxed(tmcon, KS8695_TMR_VA + KS8695_TMCON); + + /* Both registers need to count down */ + writel_relaxed(half, KS8695_TMR_VA + KS8695_T1TC); + writel_relaxed(half, KS8695_TMR_VA + KS8695_T1PD); + + /* Re-enable timer1 */ + tmcon |= TMCON_T1EN; + writel_relaxed(tmcon, KS8695_TMR_VA + KS8695_TMCON); + + return 0; +} + +static struct clock_event_device clockevent_ks8695 = { + .name = "ks8695_t1tc", + .rating = 300, /* Reasonably fast and accurate clock event */ + .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC, + .set_next_event = ks8695_set_next_event, + .set_mode = ks8695_set_mode, +}; + /* * IRQ handler for the timer. */ static irqreturn_t ks8695_timer_interrupt(int irq, void *dev_id) { - timer_tick(); + struct clock_event_device *evt = &clockevent_ks8695; + + evt->event_handler(evt); return IRQ_HANDLED; } @@ -83,18 +128,22 @@ static struct irqaction ks8695_timer_irq = { static void ks8695_timer_setup(void) { - unsigned long tmout = CLOCK_TICK_RATE / HZ; unsigned long tmcon; - /* disable timer1 */ - tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON); - __raw_writel(tmcon & ~TMCON_T1EN, KS8695_TMR_VA + KS8695_TMCON); - - __raw_writel(tmout / 2, KS8695_TMR_VA + KS8695_T1TC); - __raw_writel(tmout / 2, KS8695_TMR_VA + KS8695_T1PD); + /* Disable timer 0 and 1 */ + tmcon = readl_relaxed(KS8695_TMR_VA + KS8695_TMCON); + tmcon &= ~TMCON_T0EN; + tmcon &= ~TMCON_T1EN; + writel_relaxed(tmcon, KS8695_TMR_VA + KS8695_TMCON); - /* re-enable timer1 */ - __raw_writel(tmcon | TMCON_T1EN, KS8695_TMR_VA + KS8695_TMCON); + /* + * Use timer 1 to fire IRQs on the timeline, minimum 2 cycles + * (one on each counter) maximum 2*2^32, but the API will only + * accept up to a 32bit full word (0xFFFFFFFFU). + */ + clockevents_config_and_register(&clockevent_ks8695, + KS8695_CLOCK_RATE, 2, + 0xFFFFFFFFU); } static void __init ks8695_timer_init (void) @@ -107,8 +156,6 @@ static void __init ks8695_timer_init (void) struct sys_timer ks8695_timer = { .init = ks8695_timer_init, - .offset = ks8695_gettimeoffset, - .resume = ks8695_timer_setup, }; void ks8695_restart(char mode, const char *cmd) @@ -119,12 +166,12 @@ void ks8695_restart(char mode, const char *cmd) soft_restart(0); /* disable timer0 */ - reg = __raw_readl(KS8695_TMR_VA + KS8695_TMCON); - __raw_writel(reg & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON); + reg = readl_relaxed(KS8695_TMR_VA + KS8695_TMCON); + writel_relaxed(reg & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON); /* enable watchdog mode */ - __raw_writel((10 << 8) | T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC); + writel_relaxed((10 << 8) | T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC); /* re-enable timer0 */ - __raw_writel(reg | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON); + writel_relaxed(reg | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON); } |
