/*
- * This file contains driver for the Xilinx PS Timer Counter IP.
+ * This file contains driver for the Cadence Triple Timer Counter Rev 06
*
* Copyright (C) 2011-2013 Xilinx
*
* Timer Register Offset Definitions of Timer 1, Increment base address by 4
* and use same offsets for Timer 2
*/
-#define XTTCPS_CLK_CNTRL_OFFSET 0x00 /* Clock Control Reg, RW */
-#define XTTCPS_CNT_CNTRL_OFFSET 0x0C /* Counter Control Reg, RW */
-#define XTTCPS_COUNT_VAL_OFFSET 0x18 /* Counter Value Reg, RO */
-#define XTTCPS_INTR_VAL_OFFSET 0x24 /* Interval Count Reg, RW */
-#define XTTCPS_ISR_OFFSET 0x54 /* Interrupt Status Reg, RO */
-#define XTTCPS_IER_OFFSET 0x60 /* Interrupt Enable Reg, RW */
+#define TTC_CLK_CNTRL_OFFSET 0x00 /* Clock Control Reg, RW */
+#define TTC_CNT_CNTRL_OFFSET 0x0C /* Counter Control Reg, RW */
+#define TTC_COUNT_VAL_OFFSET 0x18 /* Counter Value Reg, RO */
+#define TTC_INTR_VAL_OFFSET 0x24 /* Interval Count Reg, RW */
+#define TTC_ISR_OFFSET 0x54 /* Interrupt Status Reg, RO */
+#define TTC_IER_OFFSET 0x60 /* Interrupt Enable Reg, RW */
-#define XTTCPS_CNT_CNTRL_DISABLE_MASK 0x1
+#define TTC_CNT_CNTRL_DISABLE_MASK 0x1
/*
* Setup the timers to use pre-scaling, using a fixed value for now that will
#define CNT_CNTRL_RESET (1 << 4)
/**
- * struct xttcps_timer - This definition defines local timer structure
+ * struct ttc_timer - This definition defines local timer structure
*
* @base_addr: Base address of timer
* @clk: Associated clock source
* @clk_rate_change_nb Notifier block for clock rate changes
*/
-struct xttcps_timer {
+struct ttc_timer {
void __iomem *base_addr;
struct clk *clk;
struct notifier_block clk_rate_change_nb;
};
-#define to_xttcps_timer(x) \
- container_of(x, struct xttcps_timer, clk_rate_change_nb)
+#define to_ttc_timer(x) \
+ container_of(x, struct ttc_timer, clk_rate_change_nb)
-struct xttcps_timer_clocksource {
- struct xttcps_timer xttc;
+struct ttc_timer_clocksource {
+ struct ttc_timer ttc;
struct clocksource cs;
};
-#define to_xttcps_timer_clksrc(x) \
- container_of(x, struct xttcps_timer_clocksource, cs)
+#define to_ttc_timer_clksrc(x) \
+ container_of(x, struct ttc_timer_clocksource, cs)
-struct xttcps_timer_clockevent {
- struct xttcps_timer xttc;
+struct ttc_timer_clockevent {
+ struct ttc_timer ttc;
struct clock_event_device ce;
};
-#define to_xttcps_timer_clkevent(x) \
- container_of(x, struct xttcps_timer_clockevent, ce)
+#define to_ttc_timer_clkevent(x) \
+ container_of(x, struct ttc_timer_clockevent, ce)
/**
- * xttcps_set_interval - Set the timer interval value
+ * ttc_set_interval - Set the timer interval value
*
* @timer: Pointer to the timer instance
* @cycles: Timer interval ticks
**/
-static void xttcps_set_interval(struct xttcps_timer *timer,
+static void ttc_set_interval(struct ttc_timer *timer,
unsigned long cycles)
{
u32 ctrl_reg;
/* Disable the counter, set the counter value and re-enable counter */
- ctrl_reg = __raw_readl(timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
- ctrl_reg |= XTTCPS_CNT_CNTRL_DISABLE_MASK;
- __raw_writel(ctrl_reg, timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
+ ctrl_reg = __raw_readl(timer->base_addr + TTC_CNT_CNTRL_OFFSET);
+ ctrl_reg |= TTC_CNT_CNTRL_DISABLE_MASK;
+ __raw_writel(ctrl_reg, timer->base_addr + TTC_CNT_CNTRL_OFFSET);
- __raw_writel(cycles, timer->base_addr + XTTCPS_INTR_VAL_OFFSET);
+ __raw_writel(cycles, timer->base_addr + TTC_INTR_VAL_OFFSET);
/*
* Reset the counter (0x10) so that it starts from 0, one-shot
* mode makes this needed for timing to be right.
*/
ctrl_reg |= CNT_CNTRL_RESET;
- ctrl_reg &= ~XTTCPS_CNT_CNTRL_DISABLE_MASK;
- __raw_writel(ctrl_reg, timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
+ ctrl_reg &= ~TTC_CNT_CNTRL_DISABLE_MASK;
+ __raw_writel(ctrl_reg, timer->base_addr + TTC_CNT_CNTRL_OFFSET);
}
/**
- * xttcps_clock_event_interrupt - Clock event timer interrupt handler
+ * ttc_clock_event_interrupt - Clock event timer interrupt handler
*
* @irq: IRQ number of the Timer
- * @dev_id: void pointer to the xttcps_timer instance
+ * @dev_id: void pointer to the ttc_timer instance
*
* returns: Always IRQ_HANDLED - success
**/
-static irqreturn_t xttcps_clock_event_interrupt(int irq, void *dev_id)
+static irqreturn_t ttc_clock_event_interrupt(int irq, void *dev_id)
{
- struct xttcps_timer_clockevent *xttce = dev_id;
- struct xttcps_timer *timer = &xttce->xttc;
+ struct ttc_timer_clockevent *ttce = dev_id;
+ struct ttc_timer *timer = &ttce->ttc;
/* Acknowledge the interrupt and call event handler */
- __raw_readl(timer->base_addr + XTTCPS_ISR_OFFSET);
+ __raw_readl(timer->base_addr + TTC_ISR_OFFSET);
- xttce->ce.event_handler(&xttce->ce);
+ ttce->ce.event_handler(&ttce->ce);
return IRQ_HANDLED;
}
/**
- * __xttc_clocksource_read - Reads the timer counter register
+ * __ttc_clocksource_read - Reads the timer counter register
*
* returns: Current timer counter register value
**/
-static cycle_t __xttc_clocksource_read(struct clocksource *cs)
+static cycle_t __ttc_clocksource_read(struct clocksource *cs)
{
- struct xttcps_timer *timer = &to_xttcps_timer_clksrc(cs)->xttc;
+ struct ttc_timer *timer = &to_ttc_timer_clksrc(cs)->ttc;
return (cycle_t)__raw_readl(timer->base_addr +
- XTTCPS_COUNT_VAL_OFFSET);
+ TTC_COUNT_VAL_OFFSET);
}
/**
- * xttcps_set_next_event - Sets the time interval for next event
+ * ttc_set_next_event - Sets the time interval for next event
*
* @cycles: Timer interval ticks
* @evt: Address of clock event instance
*
* returns: Always 0 - success
**/
-static int xttcps_set_next_event(unsigned long cycles,
+static int ttc_set_next_event(unsigned long cycles,
struct clock_event_device *evt)
{
- struct xttcps_timer_clockevent *xttce = to_xttcps_timer_clkevent(evt);
- struct xttcps_timer *timer = &xttce->xttc;
+ struct ttc_timer_clockevent *ttce = to_ttc_timer_clkevent(evt);
+ struct ttc_timer *timer = &ttce->ttc;
- xttcps_set_interval(timer, cycles);
+ ttc_set_interval(timer, cycles);
return 0;
}
/**
- * xttcps_set_mode - Sets the mode of timer
+ * ttc_set_mode - Sets the mode of timer
*
* @mode: Mode to be set
* @evt: Address of clock event instance
**/
-static void xttcps_set_mode(enum clock_event_mode mode,
+static void ttc_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
- struct xttcps_timer_clockevent *xttce = to_xttcps_timer_clkevent(evt);
- struct xttcps_timer *timer = &xttce->xttc;
+ struct ttc_timer_clockevent *ttce = to_ttc_timer_clkevent(evt);
+ struct ttc_timer *timer = &ttce->ttc;
u32 ctrl_reg;
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
- xttcps_set_interval(timer,
- DIV_ROUND_CLOSEST(clk_get_rate(xttce->xttc.clk),
+ ttc_set_interval(timer,
+ DIV_ROUND_CLOSEST(clk_get_rate(ttce->ttc.clk),
PRESCALE * HZ));
break;
case CLOCK_EVT_MODE_ONESHOT:
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
ctrl_reg = __raw_readl(timer->base_addr +
- XTTCPS_CNT_CNTRL_OFFSET);
- ctrl_reg |= XTTCPS_CNT_CNTRL_DISABLE_MASK;
+ TTC_CNT_CNTRL_OFFSET);
+ ctrl_reg |= TTC_CNT_CNTRL_DISABLE_MASK;
__raw_writel(ctrl_reg,
- timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
+ timer->base_addr + TTC_CNT_CNTRL_OFFSET);
break;
case CLOCK_EVT_MODE_RESUME:
ctrl_reg = __raw_readl(timer->base_addr +
- XTTCPS_CNT_CNTRL_OFFSET);
- ctrl_reg &= ~XTTCPS_CNT_CNTRL_DISABLE_MASK;
+ TTC_CNT_CNTRL_OFFSET);
+ ctrl_reg &= ~TTC_CNT_CNTRL_DISABLE_MASK;
__raw_writel(ctrl_reg,
- timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
+ timer->base_addr + TTC_CNT_CNTRL_OFFSET);
break;
}
}
-static int xttcps_rate_change_clocksource_cb(struct notifier_block *nb,
+static int ttc_rate_change_clocksource_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct clk_notifier_data *ndata = data;
- struct xttcps_timer *xttcps = to_xttcps_timer(nb);
- struct xttcps_timer_clocksource *xttccs = container_of(xttcps,
- struct xttcps_timer_clocksource, xttc);
+ struct ttc_timer *ttc = to_ttc_timer(nb);
+ struct ttc_timer_clocksource *ttccs = container_of(ttc,
+ struct ttc_timer_clocksource, ttc);
switch (event) {
case POST_RATE_CHANGE:
* one unregister call, but only trigger one clocksource switch
* for the cost of another HW timer used by the OS.
*/
- clocksource_unregister(&xttccs->cs);
- clocksource_register_hz(&xttccs->cs,
+ clocksource_unregister(&ttccs->cs);
+ clocksource_register_hz(&ttccs->cs,
ndata->new_rate / PRESCALE);
/* fall through */
case PRE_RATE_CHANGE:
}
}
-static void __init xttc_setup_clocksource(struct clk *clk, void __iomem *base)
+static void __init ttc_setup_clocksource(struct clk *clk, void __iomem *base)
{
- struct xttcps_timer_clocksource *ttccs;
+ struct ttc_timer_clocksource *ttccs;
int err;
ttccs = kzalloc(sizeof(*ttccs), GFP_KERNEL);
if (WARN_ON(!ttccs))
return;
- ttccs->xttc.clk = clk;
+ ttccs->ttc.clk = clk;
- err = clk_prepare_enable(ttccs->xttc.clk);
+ err = clk_prepare_enable(ttccs->ttc.clk);
if (WARN_ON(err)) {
kfree(ttccs);
return;
}
- ttccs->xttc.clk_rate_change_nb.notifier_call =
- xttcps_rate_change_clocksource_cb;
- ttccs->xttc.clk_rate_change_nb.next = NULL;
- if (clk_notifier_register(ttccs->xttc.clk,
- &ttccs->xttc.clk_rate_change_nb))
+ ttccs->ttc.clk_rate_change_nb.notifier_call =
+ ttc_rate_change_clocksource_cb;
+ ttccs->ttc.clk_rate_change_nb.next = NULL;
+ if (clk_notifier_register(ttccs->ttc.clk,
+ &ttccs->ttc.clk_rate_change_nb))
pr_warn("Unable to register clock notifier.\n");
- ttccs->xttc.base_addr = base;
- ttccs->cs.name = "xttcps_clocksource";
+ ttccs->ttc.base_addr = base;
+ ttccs->cs.name = "ttc_clocksource";
ttccs->cs.rating = 200;
- ttccs->cs.read = __xttc_clocksource_read;
+ ttccs->cs.read = __ttc_clocksource_read;
ttccs->cs.mask = CLOCKSOURCE_MASK(16);
ttccs->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
* with no interrupt and it rolls over at 0xFFFF. Pre-scale
* it by 32 also. Let it start running now.
*/
- __raw_writel(0x0, ttccs->xttc.base_addr + XTTCPS_IER_OFFSET);
+ __raw_writel(0x0, ttccs->ttc.base_addr + TTC_IER_OFFSET);
__raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN,
- ttccs->xttc.base_addr + XTTCPS_CLK_CNTRL_OFFSET);
+ ttccs->ttc.base_addr + TTC_CLK_CNTRL_OFFSET);
__raw_writel(CNT_CNTRL_RESET,
- ttccs->xttc.base_addr + XTTCPS_CNT_CNTRL_OFFSET);
+ ttccs->ttc.base_addr + TTC_CNT_CNTRL_OFFSET);
err = clocksource_register_hz(&ttccs->cs,
- clk_get_rate(ttccs->xttc.clk) / PRESCALE);
+ clk_get_rate(ttccs->ttc.clk) / PRESCALE);
if (WARN_ON(err)) {
kfree(ttccs);
return;
}
}
-static int xttcps_rate_change_clockevent_cb(struct notifier_block *nb,
+static int ttc_rate_change_clockevent_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct clk_notifier_data *ndata = data;
- struct xttcps_timer *xttcps = to_xttcps_timer(nb);
- struct xttcps_timer_clockevent *xttcce = container_of(xttcps,
- struct xttcps_timer_clockevent, xttc);
+ struct ttc_timer *ttc = to_ttc_timer(nb);
+ struct ttc_timer_clockevent *ttcce = container_of(ttc,
+ struct ttc_timer_clockevent, ttc);
switch (event) {
case POST_RATE_CHANGE:
* cores.
*/
local_irq_save(flags);
- clockevents_update_freq(&xttcce->ce,
+ clockevents_update_freq(&ttcce->ce,
ndata->new_rate / PRESCALE);
local_irq_restore(flags);
}
}
-static void __init xttc_setup_clockevent(struct clk *clk,
+static void __init ttc_setup_clockevent(struct clk *clk,
void __iomem *base, u32 irq)
{
- struct xttcps_timer_clockevent *ttcce;
+ struct ttc_timer_clockevent *ttcce;
int err;
ttcce = kzalloc(sizeof(*ttcce), GFP_KERNEL);
if (WARN_ON(!ttcce))
return;
- ttcce->xttc.clk = clk;
+ ttcce->ttc.clk = clk;
- err = clk_prepare_enable(ttcce->xttc.clk);
+ err = clk_prepare_enable(ttcce->ttc.clk);
if (WARN_ON(err)) {
kfree(ttcce);
return;
}
- ttcce->xttc.clk_rate_change_nb.notifier_call =
- xttcps_rate_change_clockevent_cb;
- ttcce->xttc.clk_rate_change_nb.next = NULL;
- if (clk_notifier_register(ttcce->xttc.clk,
- &ttcce->xttc.clk_rate_change_nb))
+ ttcce->ttc.clk_rate_change_nb.notifier_call =
+ ttc_rate_change_clockevent_cb;
+ ttcce->ttc.clk_rate_change_nb.next = NULL;
+ if (clk_notifier_register(ttcce->ttc.clk,
+ &ttcce->ttc.clk_rate_change_nb))
pr_warn("Unable to register clock notifier.\n");
- ttcce->xttc.base_addr = base;
- ttcce->ce.name = "xttcps_clockevent";
+ ttcce->ttc.base_addr = base;
+ ttcce->ce.name = "ttc_clockevent";
ttcce->ce.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
- ttcce->ce.set_next_event = xttcps_set_next_event;
- ttcce->ce.set_mode = xttcps_set_mode;
+ ttcce->ce.set_next_event = ttc_set_next_event;
+ ttcce->ce.set_mode = ttc_set_mode;
ttcce->ce.rating = 200;
ttcce->ce.irq = irq;
ttcce->ce.cpumask = cpu_possible_mask;
* is prescaled by 32 using the interval interrupt. Leave it
* disabled for now.
*/
- __raw_writel(0x23, ttcce->xttc.base_addr + XTTCPS_CNT_CNTRL_OFFSET);
+ __raw_writel(0x23, ttcce->ttc.base_addr + TTC_CNT_CNTRL_OFFSET);
__raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN,
- ttcce->xttc.base_addr + XTTCPS_CLK_CNTRL_OFFSET);
- __raw_writel(0x1, ttcce->xttc.base_addr + XTTCPS_IER_OFFSET);
+ ttcce->ttc.base_addr + TTC_CLK_CNTRL_OFFSET);
+ __raw_writel(0x1, ttcce->ttc.base_addr + TTC_IER_OFFSET);
- err = request_irq(irq, xttcps_clock_event_interrupt,
+ err = request_irq(irq, ttc_clock_event_interrupt,
IRQF_DISABLED | IRQF_TIMER,
ttcce->ce.name, ttcce);
if (WARN_ON(err)) {
}
clockevents_config_and_register(&ttcce->ce,
- clk_get_rate(ttcce->xttc.clk) / PRESCALE, 1, 0xfffe);
+ clk_get_rate(ttcce->ttc.clk) / PRESCALE, 1, 0xfffe);
}
/**
- * xttcps_timer_init - Initialize the timer
+ * ttc_timer_init - Initialize the timer
*
* Initializes the timer hardware and register the clock source and clock event
* timers with Linux kernal timer framework
*/
-static void __init xttcps_timer_init(struct device_node *timer)
+static void __init ttc_timer_init(struct device_node *timer)
{
unsigned int irq;
void __iomem *timer_baseaddr;
BUG();
}
- xttc_setup_clocksource(clk, timer_baseaddr);
- xttc_setup_clockevent(clk, timer_baseaddr + 4, irq);
+ ttc_setup_clocksource(clk, timer_baseaddr);
+ ttc_setup_clockevent(clk, timer_baseaddr + 4, irq);
pr_info("%s #0 at %p, irq=%d\n", timer->name, timer_baseaddr, irq);
}
-CLOCKSOURCE_OF_DECLARE(ttc, "cdns,ttc", xttcps_timer_init);
+CLOCKSOURCE_OF_DECLARE(ttc, "cdns,ttc", ttc_timer_init);
projects / linux.git / commitdiff