diff options
Diffstat (limited to 'target/linux/brcm63xx/files/arch/mips/bcm63xx/timer.c')
| -rw-r--r-- | target/linux/brcm63xx/files/arch/mips/bcm63xx/timer.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/target/linux/brcm63xx/files/arch/mips/bcm63xx/timer.c b/target/linux/brcm63xx/files/arch/mips/bcm63xx/timer.c deleted file mode 100644 index ba522bdcd..000000000 --- a/target/linux/brcm63xx/files/arch/mips/bcm63xx/timer.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> - */ - -#include <linux/kernel.h> -#include <linux/err.h> -#include <linux/module.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <linux/clk.h> -#include <bcm63xx_cpu.h> -#include <bcm63xx_io.h> -#include <bcm63xx_timer.h> -#include <bcm63xx_regs.h> - -static DEFINE_SPINLOCK(timer_reg_lock); -static DEFINE_SPINLOCK(timer_data_lock); -static struct clk *periph_clk; - -static struct timer_data { - void (*cb)(void *); - void *data; -} timer_data[BCM63XX_TIMER_COUNT]; - -static irqreturn_t timer_interrupt(int irq, void *dev_id) -{ - u32 stat; - int i; - - spin_lock(&timer_reg_lock); - stat = bcm_timer_readl(TIMER_IRQSTAT_REG); - bcm_timer_writel(stat, TIMER_IRQSTAT_REG); - spin_unlock(&timer_reg_lock); - - for (i = 0; i < BCM63XX_TIMER_COUNT; i++) { - if (!(stat & TIMER_IRQSTAT_TIMER_CAUSE(i))) - continue; - - spin_lock(&timer_data_lock); - if (!timer_data[i].cb) { - spin_unlock(&timer_data_lock); - continue; - } - - timer_data[i].cb(timer_data[i].data); - spin_unlock(&timer_data_lock); - } - - return IRQ_HANDLED; -} - -int bcm63xx_timer_enable(int id) -{ - u32 reg; - unsigned long flags; - - if (id >= BCM63XX_TIMER_COUNT) - return -EINVAL; - - spin_lock_irqsave(&timer_reg_lock, flags); - - reg = bcm_timer_readl(TIMER_CTLx_REG(id)); - reg |= TIMER_CTL_ENABLE_MASK; - bcm_timer_writel(reg, TIMER_CTLx_REG(id)); - - reg = bcm_timer_readl(TIMER_IRQSTAT_REG); - reg |= TIMER_IRQSTAT_TIMER_IR_EN(id); - bcm_timer_writel(reg, TIMER_IRQSTAT_REG); - - spin_unlock_irqrestore(&timer_reg_lock, flags); - return 0; -} - -EXPORT_SYMBOL(bcm63xx_timer_enable); - -int bcm63xx_timer_disable(int id) -{ - u32 reg; - unsigned long flags; - - if (id >= BCM63XX_TIMER_COUNT) - return -EINVAL; - - spin_lock_irqsave(&timer_reg_lock, flags); - - reg = bcm_timer_readl(TIMER_CTLx_REG(id)); - reg &= ~TIMER_CTL_ENABLE_MASK; - bcm_timer_writel(reg, TIMER_CTLx_REG(id)); - - reg = bcm_timer_readl(TIMER_IRQSTAT_REG); - reg &= ~TIMER_IRQSTAT_TIMER_IR_EN(id); - bcm_timer_writel(reg, TIMER_IRQSTAT_REG); - - spin_unlock_irqrestore(&timer_reg_lock, flags); - return 0; -} - -EXPORT_SYMBOL(bcm63xx_timer_disable); - -int bcm63xx_timer_register(int id, void (*callback)(void *data), void *data) -{ - unsigned long flags; - int ret; - - if (id >= BCM63XX_TIMER_COUNT || !callback) - return -EINVAL; - - ret = 0; - spin_lock_irqsave(&timer_data_lock, flags); - if (timer_data[id].cb) { - ret = -EBUSY; - goto out; - } - - timer_data[id].cb = callback; - timer_data[id].data = data; - -out: - spin_unlock_irqrestore(&timer_data_lock, flags); - return ret; -} - -EXPORT_SYMBOL(bcm63xx_timer_register); - -void bcm63xx_timer_unregister(int id) -{ - unsigned long flags; - - if (id >= BCM63XX_TIMER_COUNT) - return; - - spin_lock_irqsave(&timer_data_lock, flags); - timer_data[id].cb = NULL; - spin_unlock_irqrestore(&timer_data_lock, flags); -} - -EXPORT_SYMBOL(bcm63xx_timer_unregister); - -unsigned int bcm63xx_timer_countdown(unsigned int countdown_us) -{ - return (clk_get_rate(periph_clk) / (1000 * 1000)) * countdown_us; -} - -EXPORT_SYMBOL(bcm63xx_timer_countdown); - -int bcm63xx_timer_set(int id, int monotonic, unsigned int countdown_us) -{ - u32 reg, countdown; - unsigned long flags; - - if (id >= BCM63XX_TIMER_COUNT) - return -EINVAL; - - countdown = bcm63xx_timer_countdown(countdown_us); - if (countdown & ~TIMER_CTL_COUNTDOWN_MASK) - return -EINVAL; - - spin_lock_irqsave(&timer_reg_lock, flags); - reg = bcm_timer_readl(TIMER_CTLx_REG(id)); - - if (monotonic) - reg &= ~TIMER_CTL_MONOTONIC_MASK; - else - reg |= TIMER_CTL_MONOTONIC_MASK; - - reg &= ~TIMER_CTL_COUNTDOWN_MASK; - reg |= countdown; - bcm_timer_writel(reg, TIMER_CTLx_REG(id)); - - spin_unlock_irqrestore(&timer_reg_lock, flags); - return 0; -} - -EXPORT_SYMBOL(bcm63xx_timer_set); - -int bcm63xx_timer_init(void) -{ - int ret, irq; - u32 reg; - - reg = bcm_timer_readl(TIMER_IRQSTAT_REG); - reg &= ~TIMER_IRQSTAT_TIMER0_IR_EN; - reg &= ~TIMER_IRQSTAT_TIMER1_IR_EN; - reg &= ~TIMER_IRQSTAT_TIMER2_IR_EN; - bcm_timer_writel(reg, TIMER_IRQSTAT_REG); - - periph_clk = clk_get(NULL, "periph"); - if (IS_ERR(periph_clk)) - return -ENODEV; - - irq = bcm63xx_get_irq_number(IRQ_TIMER); - ret = request_irq(irq, timer_interrupt, 0, "bcm63xx_timer", NULL); - if (ret) { - printk(KERN_ERR "bcm63xx_timer: failed to register irq\n"); - return ret; - } - - return 0; -} - -arch_initcall(bcm63xx_timer_init); |