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Diffstat (limited to 'drivers/clocksource/h8300_timer8.c')
-rw-r--r--drivers/clocksource/h8300_timer8.c211
1 files changed, 0 insertions, 211 deletions
diff --git a/drivers/clocksource/h8300_timer8.c b/drivers/clocksource/h8300_timer8.c
deleted file mode 100644
index 47114c2a7cb5..000000000000
--- a/drivers/clocksource/h8300_timer8.c
+++ /dev/null
@@ -1,211 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/arch/h8300/kernel/cpu/timer/timer8.c
- *
- * Yoshinori Sato <ysato@users.sourcefoge.jp>
- *
- * 8bit Timer driver
- *
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/clockchips.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-
-#define _8TCR 0
-#define _8TCSR 2
-#define TCORA 4
-#define TCORB 6
-#define _8TCNT 8
-
-#define CMIEA 6
-#define CMFA 6
-
-#define FLAG_STARTED (1 << 3)
-
-#define SCALE 64
-
-#define bset(b, a) iowrite8(ioread8(a) | (1 << (b)), (a))
-#define bclr(b, a) iowrite8(ioread8(a) & ~(1 << (b)), (a))
-
-struct timer8_priv {
- struct clock_event_device ced;
- void __iomem *mapbase;
- unsigned long flags;
- unsigned int rate;
-};
-
-static irqreturn_t timer8_interrupt(int irq, void *dev_id)
-{
- struct timer8_priv *p = dev_id;
-
- if (clockevent_state_oneshot(&p->ced))
- iowrite16be(0x0000, p->mapbase + _8TCR);
-
- p->ced.event_handler(&p->ced);
-
- bclr(CMFA, p->mapbase + _8TCSR);
-
- return IRQ_HANDLED;
-}
-
-static void timer8_set_next(struct timer8_priv *p, unsigned long delta)
-{
- if (delta >= 0x10000)
- pr_warn("delta out of range\n");
- bclr(CMIEA, p->mapbase + _8TCR);
- iowrite16be(delta, p->mapbase + TCORA);
- iowrite16be(0x0000, p->mapbase + _8TCNT);
- bclr(CMFA, p->mapbase + _8TCSR);
- bset(CMIEA, p->mapbase + _8TCR);
-}
-
-static int timer8_enable(struct timer8_priv *p)
-{
- iowrite16be(0xffff, p->mapbase + TCORA);
- iowrite16be(0x0000, p->mapbase + _8TCNT);
- iowrite16be(0x0c02, p->mapbase + _8TCR);
-
- return 0;
-}
-
-static int timer8_start(struct timer8_priv *p)
-{
- int ret;
-
- if ((p->flags & FLAG_STARTED))
- return 0;
-
- ret = timer8_enable(p);
- if (!ret)
- p->flags |= FLAG_STARTED;
-
- return ret;
-}
-
-static void timer8_stop(struct timer8_priv *p)
-{
- iowrite16be(0x0000, p->mapbase + _8TCR);
-}
-
-static inline struct timer8_priv *ced_to_priv(struct clock_event_device *ced)
-{
- return container_of(ced, struct timer8_priv, ced);
-}
-
-static void timer8_clock_event_start(struct timer8_priv *p, unsigned long delta)
-{
- timer8_start(p);
- timer8_set_next(p, delta);
-}
-
-static int timer8_clock_event_shutdown(struct clock_event_device *ced)
-{
- timer8_stop(ced_to_priv(ced));
- return 0;
-}
-
-static int timer8_clock_event_periodic(struct clock_event_device *ced)
-{
- struct timer8_priv *p = ced_to_priv(ced);
-
- pr_info("%s: used for periodic clock events\n", ced->name);
- timer8_stop(p);
- timer8_clock_event_start(p, (p->rate + HZ/2) / HZ);
-
- return 0;
-}
-
-static int timer8_clock_event_oneshot(struct clock_event_device *ced)
-{
- struct timer8_priv *p = ced_to_priv(ced);
-
- pr_info("%s: used for oneshot clock events\n", ced->name);
- timer8_stop(p);
- timer8_clock_event_start(p, 0x10000);
-
- return 0;
-}
-
-static int timer8_clock_event_next(unsigned long delta,
- struct clock_event_device *ced)
-{
- struct timer8_priv *p = ced_to_priv(ced);
-
- BUG_ON(!clockevent_state_oneshot(ced));
- timer8_set_next(p, delta - 1);
-
- return 0;
-}
-
-static struct timer8_priv timer8_priv = {
- .ced = {
- .name = "h8300_8timer",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .rating = 200,
- .set_next_event = timer8_clock_event_next,
- .set_state_shutdown = timer8_clock_event_shutdown,
- .set_state_periodic = timer8_clock_event_periodic,
- .set_state_oneshot = timer8_clock_event_oneshot,
- },
-};
-
-static int __init h8300_8timer_init(struct device_node *node)
-{
- void __iomem *base;
- int irq, ret;
- struct clk *clk;
-
- clk = of_clk_get(node, 0);
- if (IS_ERR(clk)) {
- pr_err("failed to get clock for clockevent\n");
- return PTR_ERR(clk);
- }
-
- ret = -ENXIO;
- base = of_iomap(node, 0);
- if (!base) {
- pr_err("failed to map registers for clockevent\n");
- goto free_clk;
- }
-
- ret = -EINVAL;
- irq = irq_of_parse_and_map(node, 0);
- if (!irq) {
- pr_err("failed to get irq for clockevent\n");
- goto unmap_reg;
- }
-
- timer8_priv.mapbase = base;
-
- timer8_priv.rate = clk_get_rate(clk) / SCALE;
- if (!timer8_priv.rate) {
- pr_err("Failed to get rate for the clocksource\n");
- goto unmap_reg;
- }
-
- if (request_irq(irq, timer8_interrupt, IRQF_TIMER,
- timer8_priv.ced.name, &timer8_priv) < 0) {
- pr_err("failed to request irq %d for clockevent\n", irq);
- goto unmap_reg;
- }
-
- clockevents_config_and_register(&timer8_priv.ced,
- timer8_priv.rate, 1, 0x0000ffff);
-
- return 0;
-unmap_reg:
- iounmap(base);
-free_clk:
- clk_put(clk);
- return ret;
-}
-
-TIMER_OF_DECLARE(h8300_8bit, "renesas,8bit-timer", h8300_8timer_init);