[PATCH 69/69] clocksource/drivers/h8300: Use ioread / iowrite

Daniel Lezcano
2015-12-18T14:20:12Z

From: Yoshinori Sato <ysato@users.sourceforge.jp>

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/h8300_timer16.c | 43 ++++++++++++++++++-------------------
drivers/clocksource/h8300_timer8.c | 28 ++++++++++++++----------
drivers/clocksource/h8300_tpu.c | 22 ++++++++++---------
3 files changed, 50 insertions(+), 43 deletions(-)

diff --git a/drivers/clocksource/h8300_timer16.c b/drivers/clocksource/h8300_timer16.c
index 934ed0b..75c4407 100644
--- a/drivers/clocksource/h8300_timer16.c
+++ b/drivers/clocksource/h8300_timer16.c
@@ -19,6 +19,9 @@
#define TCR 0
#define TCNT 2

+#define bset(b, a) iowrite8(ioread8(a) | (1 << (b)), (a))
+#define bclr(b, a) iowrite8(ioread8(a) & ~(1 << (b)), (a))
+
struct timer16_priv {
struct clocksource cs;
unsigned long total_cycles;
@@ -28,23 +31,22 @@ struct timer16_priv {
unsigned char enb;
unsigned char ovf;
unsigned char ovie;
- struct clk *clk;
};

static unsigned long timer16_get_counter(struct timer16_priv *p)
{
- unsigned long v1, v2, v3;
- int o1, o2;
+ unsigned short v1, v2, v3;
+ unsigned char o1, o2;

- o1 = readb(p->mapcommon + TISRC) & p->ovf;
+ o1 = ioread8(p->mapcommon + TISRC) & p->ovf;

/* Make sure the timer value is stable. Stolen from acpi_pm.c */
do {
o2 = o1;
- v1 = readw(p->mapbase + TCNT);
- v2 = readw(p->mapbase + TCNT);
- v3 = readw(p->mapbase + TCNT);
- o1 = readb(p->mapcommon + TISRC) & p->ovf;
+ v1 = ioread16be(p->mapbase + TCNT);
+ v2 = ioread16be(p->mapbase + TCNT);
+ v3 = ioread16be(p->mapbase + TCNT);
+ o1 = ioread8(p->mapcommon + TISRC) & p->ovf;
} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
|| (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));

@@ -59,8 +61,7 @@ static irqreturn_t timer16_interrupt(int irq, void *dev_id)
{
struct timer16_priv *p = (struct timer16_priv *)dev_id;

- writeb(readb(p->mapcommon + TISRC) & ~p->ovf,
- p->mapcommon + TISRC);
+ bclr(p->ovf, p->mapcommon + TISRC);
p->total_cycles += 0x10000;

return IRQ_HANDLED;
@@ -89,12 +90,10 @@ static int timer16_enable(struct clocksource *cs)
WARN_ON(p->cs_enabled);

p->total_cycles = 0;
- writew(0x0000, p->mapbase + TCNT);
- writeb(0x83, p->mapbase + TCR);
- writeb(readb(p->mapcommon + TSTR) | p->enb,
- p->mapcommon + TSTR);
- writeb(readb(p->mapcommon + TISRC) | p->ovie,
- p->mapcommon + TSTR);
+ iowrite16be(0x0000, p->mapbase + TCNT);
+ iowrite8(0x83, p->mapbase + TCR);
+ bset(p->ovie, p->mapcommon + TISRC);
+ bset(p->enb, p->mapcommon + TSTR);

p->cs_enabled = true;
return 0;
@@ -106,8 +105,8 @@ static void timer16_disable(struct clocksource *cs)

WARN_ON(!p->cs_enabled);

- writeb(readb(p->mapcommon + TSTR) & ~p->enb,
- p->mapcommon + TSTR);
+ bclr(p->ovie, p->mapcommon + TISRC);
+ bclr(p->enb, p->mapcommon + TSTR);

p->cs_enabled = false;
}
@@ -162,9 +161,9 @@ static void __init h8300_16timer_init(struct device_node *node)

timer16_priv.mapbase = base[REG_CH];
timer16_priv.mapcommon = base[REG_COMM];
- timer16_priv.enb = 1 << ch;
- timer16_priv.ovf = 1 << ch;
- timer16_priv.ovie = 1 << (4 + ch);
+ timer16_priv.enb = ch;
+ timer16_priv.ovf = ch;
+ timer16_priv.ovie = 4 + ch;

ret = request_irq(irq, timer16_interrupt,
IRQF_TIMER, timer16_priv.cs.name, &timer16_priv);
@@ -174,7 +173,7 @@ static void __init h8300_16timer_init(struct device_node *node)
}

clocksource_register_hz(&timer16_priv.cs,
- clk_get_rate(timer16_priv.clk) / 8);
+ clk_get_rate(clk) / 8);
return;

unmap_comm:
diff --git a/drivers/clocksource/h8300_timer8.c b/drivers/clocksource/h8300_timer8.c
index 9087dd2..c151941 100644
--- a/drivers/clocksource/h8300_timer8.c
+++ b/drivers/clocksource/h8300_timer8.c
@@ -24,10 +24,16 @@
#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;
@@ -40,12 +46,11 @@ static irqreturn_t timer8_interrupt(int irq, void *dev_id)
struct timer8_priv *p = dev_id;

if (clockevent_state_oneshot(&p->ced))
- writew(0x0000, p->mapbase + _8TCR);
+ iowrite16be(0x0000, p->mapbase + _8TCR);

p->ced.event_handler(&p->ced);

- writeb(readb(p->mapbase + _8TCSR) & ~0x40,
- p->mapbase + _8TCSR);
+ bclr(CMFA, p->mapbase + _8TCSR);

return IRQ_HANDLED;
}
@@ -54,17 +59,18 @@ static void timer8_set_next(struct timer8_priv *p, unsigned long delta)
{
if (delta >= 0x10000)
pr_warn("delta out of range\n");
- writeb(readb(p->mapbase + _8TCR) & ~0x40, p->mapbase + _8TCR);
- writew(0, p->mapbase + _8TCNT);
- writew(delta, p->mapbase + TCORA);
- writeb(readb(p->mapbase + _8TCR) | 0x40, p->mapbase + _8TCR);
+ 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)
{
- writew(0xffff, p->mapbase + TCORA);
- writew(0x0000, p->mapbase + _8TCNT);
- writew(0x0c02, p->mapbase + _8TCR);
+ iowrite16be(0xffff, p->mapbase + TCORA);
+ iowrite16be(0x0000, p->mapbase + _8TCNT);
+ iowrite16be(0x0c02, p->mapbase + _8TCR);

return 0;
}
@@ -85,7 +91,7 @@ static int timer8_start(struct timer8_priv *p)

static void timer8_stop(struct timer8_priv *p)
{
- writew(0x0000, p->mapbase + _8TCR);
+ iowrite16be(0x0000, p->mapbase + _8TCR);
}

static inline struct timer8_priv *ced_to_priv(struct clock_event_device *ced)
diff --git a/drivers/clocksource/h8300_tpu.c b/drivers/clocksource/h8300_tpu.c
index 91bf1992..d4c1a28 100644
--- a/drivers/clocksource/h8300_tpu.c
+++ b/drivers/clocksource/h8300_tpu.c
@@ -19,6 +19,8 @@
#define TSR 0x5
#define TCNT 0x6

+#define TCFV 0x10
+
struct tpu_priv {
struct clocksource cs;
void __iomem *mapbase1;
@@ -31,8 +33,8 @@ static inline unsigned long read_tcnt32(struct tpu_priv *p)
{
unsigned long tcnt;

- tcnt = readw(p->mapbase1 + TCNT) << 16;
- tcnt |= readw(p->mapbase2 + TCNT);
+ tcnt = ioread16be(p->mapbase1 + TCNT) << 16;
+ tcnt |= ioread16be(p->mapbase2 + TCNT);
return tcnt;
}

@@ -41,7 +43,7 @@ static int tpu_get_counter(struct tpu_priv *p, unsigned long long *val)
unsigned long v1, v2, v3;
int o1, o2;

- o1 = readb(p->mapbase1 + TSR) & 0x10;
+ o1 = ioread8(p->mapbase1 + TSR) & TCFV;

/* Make sure the timer value is stable. Stolen from acpi_pm.c */
do {
@@ -49,7 +51,7 @@ static int tpu_get_counter(struct tpu_priv *p, unsigned long long *val)
v1 = read_tcnt32(p);
v2 = read_tcnt32(p);
v3 = read_tcnt32(p);
- o1 = readb(p->mapbase1 + TSR) & 0x10;
+ o1 = ioread8(p->mapbase1 + TSR) & TCFV;
} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
|| (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));

@@ -82,10 +84,10 @@ static int tpu_clocksource_enable(struct clocksource *cs)

WARN_ON(p->cs_enabled);

- writew(0, p->mapbase1 + TCNT);
- writew(0, p->mapbase2 + TCNT);
- writeb(0x0f, p->mapbase1 + TCR);
- writeb(0x03, p->mapbase2 + TCR);
+ iowrite16be(0, p->mapbase1 + TCNT);
+ iowrite16be(0, p->mapbase2 + TCNT);
+ iowrite8(0x0f, p->mapbase1 + TCR);
+ iowrite8(0x03, p->mapbase2 + TCR);

p->cs_enabled = true;
return 0;
@@ -97,8 +99,8 @@ static void tpu_clocksource_disable(struct clocksource *cs)

WARN_ON(!p->cs_enabled);

- writeb(0, p->mapbase1 + TCR);
- writeb(0, p->mapbase2 + TCR);
+ iowrite8(0, p->mapbase1 + TCR);
+ iowrite8(0, p->mapbase2 + TCR);
p->cs_enabled = false;
}

--
1.9.1