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-rw-r--r--arch/arm/mach-zynq/timer.c324
1 files changed, 0 insertions, 324 deletions
diff --git a/arch/arm/mach-zynq/timer.c b/arch/arm/mach-zynq/timer.c
deleted file mode 100644
index f9fbc9c1e7a6..000000000000
--- a/arch/arm/mach-zynq/timer.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * This file contains driver for the Xilinx PS Timer Counter IP.
- *
- * Copyright (C) 2011 Xilinx
- *
- * based on arch/mips/kernel/time.c timer driver
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- */
-
-#include <linux/interrupt.h>
-#include <linux/clockchips.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/slab.h>
-#include <linux/clk-provider.h>
-#include "common.h"
-
-/*
- * 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 XTTCPS_CNT_CNTRL_DISABLE_MASK 0x1
-
-/*
- * Setup the timers to use pre-scaling, using a fixed value for now that will
- * work across most input frequency, but it may need to be more dynamic
- */
-#define PRESCALE_EXPONENT 11 /* 2 ^ PRESCALE_EXPONENT = PRESCALE */
-#define PRESCALE 2048 /* The exponent must match this */
-#define CLK_CNTRL_PRESCALE ((PRESCALE_EXPONENT - 1) << 1)
-#define CLK_CNTRL_PRESCALE_EN 1
-#define CNT_CNTRL_RESET (1<<4)
-
-/**
- * struct xttcps_timer - This definition defines local timer structure
- *
- * @base_addr: Base address of timer
- **/
-struct xttcps_timer {
- void __iomem *base_addr;
-};
-
-struct xttcps_timer_clocksource {
- struct xttcps_timer xttc;
- struct clocksource cs;
-};
-
-#define to_xttcps_timer_clksrc(x) \
- container_of(x, struct xttcps_timer_clocksource, cs)
-
-struct xttcps_timer_clockevent {
- struct xttcps_timer xttc;
- struct clock_event_device ce;
- struct clk *clk;
-};
-
-#define to_xttcps_timer_clkevent(x) \
- container_of(x, struct xttcps_timer_clockevent, ce)
-
-/**
- * xttcps_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,
- 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);
-
- __raw_writel(cycles, timer->base_addr + XTTCPS_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);
-}
-
-/**
- * xttcps_clock_event_interrupt - Clock event timer interrupt handler
- *
- * @irq: IRQ number of the Timer
- * @dev_id: void pointer to the xttcps_timer instance
- *
- * returns: Always IRQ_HANDLED - success
- **/
-static irqreturn_t xttcps_clock_event_interrupt(int irq, void *dev_id)
-{
- struct xttcps_timer_clockevent *xttce = dev_id;
- struct xttcps_timer *timer = &xttce->xttc;
-
- /* Acknowledge the interrupt and call event handler */
- __raw_readl(timer->base_addr + XTTCPS_ISR_OFFSET);
-
- xttce->ce.event_handler(&xttce->ce);
-
- return IRQ_HANDLED;
-}
-
-/**
- * __xttc_clocksource_read - Reads the timer counter register
- *
- * returns: Current timer counter register value
- **/
-static cycle_t __xttc_clocksource_read(struct clocksource *cs)
-{
- struct xttcps_timer *timer = &to_xttcps_timer_clksrc(cs)->xttc;
-
- return (cycle_t)__raw_readl(timer->base_addr +
- XTTCPS_COUNT_VAL_OFFSET);
-}
-
-/**
- * xttcps_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,
- struct clock_event_device *evt)
-{
- struct xttcps_timer_clockevent *xttce = to_xttcps_timer_clkevent(evt);
- struct xttcps_timer *timer = &xttce->xttc;
-
- xttcps_set_interval(timer, cycles);
- return 0;
-}
-
-/**
- * xttcps_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,
- struct clock_event_device *evt)
-{
- struct xttcps_timer_clockevent *xttce = to_xttcps_timer_clkevent(evt);
- struct xttcps_timer *timer = &xttce->xttc;
- u32 ctrl_reg;
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- xttcps_set_interval(timer,
- DIV_ROUND_CLOSEST(clk_get_rate(xttce->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;
- __raw_writel(ctrl_reg,
- timer->base_addr + XTTCPS_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;
- __raw_writel(ctrl_reg,
- timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
- break;
- }
-}
-
-static void __init zynq_ttc_setup_clocksource(struct device_node *np,
- void __iomem *base)
-{
- struct xttcps_timer_clocksource *ttccs;
- struct clk *clk;
- int err;
- u32 reg;
-
- ttccs = kzalloc(sizeof(*ttccs), GFP_KERNEL);
- if (WARN_ON(!ttccs))
- return;
-
- err = of_property_read_u32(np, "reg", &reg);
- if (WARN_ON(err))
- return;
-
- clk = of_clk_get_by_name(np, "cpu_1x");
- if (WARN_ON(IS_ERR(clk)))
- return;
-
- err = clk_prepare_enable(clk);
- if (WARN_ON(err))
- return;
-
- ttccs->xttc.base_addr = base + reg * 4;
-
- ttccs->cs.name = np->name;
- ttccs->cs.rating = 200;
- ttccs->cs.read = __xttc_clocksource_read;
- ttccs->cs.mask = CLOCKSOURCE_MASK(16);
- ttccs->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
-
- __raw_writel(0x0, ttccs->xttc.base_addr + XTTCPS_IER_OFFSET);
- __raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN,
- ttccs->xttc.base_addr + XTTCPS_CLK_CNTRL_OFFSET);
- __raw_writel(CNT_CNTRL_RESET,
- ttccs->xttc.base_addr + XTTCPS_CNT_CNTRL_OFFSET);
-
- err = clocksource_register_hz(&ttccs->cs, clk_get_rate(clk) / PRESCALE);
- if (WARN_ON(err))
- return;
-}
-
-static void __init zynq_ttc_setup_clockevent(struct device_node *np,
- void __iomem *base)
-{
- struct xttcps_timer_clockevent *ttcce;
- int err, irq;
- u32 reg;
-
- ttcce = kzalloc(sizeof(*ttcce), GFP_KERNEL);
- if (WARN_ON(!ttcce))
- return;
-
- err = of_property_read_u32(np, "reg", &reg);
- if (WARN_ON(err))
- return;
-
- ttcce->xttc.base_addr = base + reg * 4;
-
- ttcce->clk = of_clk_get_by_name(np, "cpu_1x");
- if (WARN_ON(IS_ERR(ttcce->clk)))
- return;
-
- err = clk_prepare_enable(ttcce->clk);
- if (WARN_ON(err))
- return;
-
- irq = irq_of_parse_and_map(np, 0);
- if (WARN_ON(!irq))
- return;
-
- ttcce->ce.name = np->name;
- 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.rating = 200;
- ttcce->ce.irq = irq;
- ttcce->ce.cpumask = cpu_possible_mask;
-
- __raw_writel(0x23, ttcce->xttc.base_addr + XTTCPS_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);
-
- err = request_irq(irq, xttcps_clock_event_interrupt, IRQF_TIMER,
- np->name, ttcce);
- if (WARN_ON(err))
- return;
-
- clockevents_config_and_register(&ttcce->ce,
- clk_get_rate(ttcce->clk) / PRESCALE,
- 1, 0xfffe);
-}
-
-static const __initconst struct of_device_id zynq_ttc_match[] = {
- { .compatible = "xlnx,ttc-counter-clocksource",
- .data = zynq_ttc_setup_clocksource, },
- { .compatible = "xlnx,ttc-counter-clockevent",
- .data = zynq_ttc_setup_clockevent, },
- {}
-};
-
-/**
- * xttcps_timer_init - Initialize the timer
- *
- * Initializes the timer hardware and register the clock source and clock event
- * timers with Linux kernal timer framework
- **/
-void __init xttcps_timer_init(void)
-{
- struct device_node *np;
-
- for_each_compatible_node(np, NULL, "xlnx,ttc") {
- struct device_node *np_chld;
- void __iomem *base;
-
- base = of_iomap(np, 0);
- if (WARN_ON(!base))
- return;
-
- for_each_available_child_of_node(np, np_chld) {
- int (*cb)(struct device_node *np, void __iomem *base);
- const struct of_device_id *match;
-
- match = of_match_node(zynq_ttc_match, np_chld);
- if (match) {
- cb = match->data;
- cb(np_chld, base);
- }
- }
- }
-}