1 files changed, 300 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/gptimers.c b/arch/blackfin/kernel/gptimers.c
new file mode 100644
index 00000000..06459f4b
--- /dev/null
+++ b/arch/blackfin/kernel/gptimers.c
@@ -0,0 +1,300 @@
+/*
+ * gptimers.c - Blackfin General Purpose Timer core API
+ *
+ * Copyright (c) 2005-2008 Analog Devices Inc.
+ * Copyright (C) 2005 John DeHority
+ * Copyright (C) 2006 Hella Aglaia GmbH (awe@aglaia-gmbh.de)
+ *
+ * Licensed under the GPLv2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+
+#include <asm/blackfin.h>
+#include <asm/gptimers.h>
+
+#ifdef DEBUG
+# define tassert(expr)
+#else
+# define tassert(expr) \
+	if (!(expr)) \
+		printk(KERN_DEBUG "%s:%s:%i: Assertion failed: " #expr "\n", __FILE__, __func__, __LINE__);
+#endif
+
+#define BFIN_TIMER_NUM_GROUP  (BFIN_TIMER_OCTET(MAX_BLACKFIN_GPTIMERS - 1) + 1)
+
+static struct bfin_gptimer_regs * const timer_regs[MAX_BLACKFIN_GPTIMERS] =
+{
+	(void *)TIMER0_CONFIG,
+	(void *)TIMER1_CONFIG,
+	(void *)TIMER2_CONFIG,
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+	(void *)TIMER3_CONFIG,
+	(void *)TIMER4_CONFIG,
+	(void *)TIMER5_CONFIG,
+	(void *)TIMER6_CONFIG,
+	(void *)TIMER7_CONFIG,
+# if (MAX_BLACKFIN_GPTIMERS > 8)
+	(void *)TIMER8_CONFIG,
+	(void *)TIMER9_CONFIG,
+	(void *)TIMER10_CONFIG,
+#  if (MAX_BLACKFIN_GPTIMERS > 11)
+	(void *)TIMER11_CONFIG,
+#  endif
+# endif
+#endif
+};
+
+static struct bfin_gptimer_group_regs * const group_regs[BFIN_TIMER_NUM_GROUP] =
+{
+	(void *)TIMER0_GROUP_REG,
+#if (MAX_BLACKFIN_GPTIMERS > 8)
+	(void *)TIMER8_GROUP_REG,
+#endif
+};
+
+static uint32_t const trun_mask[MAX_BLACKFIN_GPTIMERS] =
+{
+	TIMER_STATUS_TRUN0,
+	TIMER_STATUS_TRUN1,
+	TIMER_STATUS_TRUN2,
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+	TIMER_STATUS_TRUN3,
+	TIMER_STATUS_TRUN4,
+	TIMER_STATUS_TRUN5,
+	TIMER_STATUS_TRUN6,
+	TIMER_STATUS_TRUN7,
+# if (MAX_BLACKFIN_GPTIMERS > 8)
+	TIMER_STATUS_TRUN8,
+	TIMER_STATUS_TRUN9,
+	TIMER_STATUS_TRUN10,
+#  if (MAX_BLACKFIN_GPTIMERS > 11)
+	TIMER_STATUS_TRUN11,
+#  endif
+# endif
+#endif
+};
+
+static uint32_t const tovf_mask[MAX_BLACKFIN_GPTIMERS] =
+{
+	TIMER_STATUS_TOVF0,
+	TIMER_STATUS_TOVF1,
+	TIMER_STATUS_TOVF2,
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+	TIMER_STATUS_TOVF3,
+	TIMER_STATUS_TOVF4,
+	TIMER_STATUS_TOVF5,
+	TIMER_STATUS_TOVF6,
+	TIMER_STATUS_TOVF7,
+# if (MAX_BLACKFIN_GPTIMERS > 8)
+	TIMER_STATUS_TOVF8,
+	TIMER_STATUS_TOVF9,
+	TIMER_STATUS_TOVF10,
+#  if (MAX_BLACKFIN_GPTIMERS > 11)
+	TIMER_STATUS_TOVF11,
+#  endif
+# endif
+#endif
+};
+
+static uint32_t const timil_mask[MAX_BLACKFIN_GPTIMERS] =
+{
+	TIMER_STATUS_TIMIL0,
+	TIMER_STATUS_TIMIL1,
+	TIMER_STATUS_TIMIL2,
+#if (MAX_BLACKFIN_GPTIMERS > 3)
+	TIMER_STATUS_TIMIL3,
+	TIMER_STATUS_TIMIL4,
+	TIMER_STATUS_TIMIL5,
+	TIMER_STATUS_TIMIL6,
+	TIMER_STATUS_TIMIL7,
+# if (MAX_BLACKFIN_GPTIMERS > 8)
+	TIMER_STATUS_TIMIL8,
+	TIMER_STATUS_TIMIL9,
+	TIMER_STATUS_TIMIL10,
+#  if (MAX_BLACKFIN_GPTIMERS > 11)
+	TIMER_STATUS_TIMIL11,
+#  endif
+# endif
+#endif
+};
+
+void set_gptimer_pwidth(unsigned int timer_id, uint32_t value)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	bfin_write(&timer_regs[timer_id]->width, value);
+	SSYNC();
+}
+EXPORT_SYMBOL(set_gptimer_pwidth);
+
+uint32_t get_gptimer_pwidth(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	return bfin_read(&timer_regs[timer_id]->width);
+}
+EXPORT_SYMBOL(get_gptimer_pwidth);
+
+void set_gptimer_period(unsigned int timer_id, uint32_t period)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	bfin_write(&timer_regs[timer_id]->period, period);
+	SSYNC();
+}
+EXPORT_SYMBOL(set_gptimer_period);
+
+uint32_t get_gptimer_period(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	return bfin_read(&timer_regs[timer_id]->period);
+}
+EXPORT_SYMBOL(get_gptimer_period);
+
+uint32_t get_gptimer_count(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	return bfin_read(&timer_regs[timer_id]->counter);
+}
+EXPORT_SYMBOL(get_gptimer_count);
+
+uint32_t get_gptimer_status(unsigned int group)
+{
+	tassert(group < BFIN_TIMER_NUM_GROUP);
+	return bfin_read(&group_regs[group]->status);
+}
+EXPORT_SYMBOL(get_gptimer_status);
+
+void set_gptimer_status(unsigned int group, uint32_t value)
+{
+	tassert(group < BFIN_TIMER_NUM_GROUP);
+	bfin_write(&group_regs[group]->status, value);
+	SSYNC();
+}
+EXPORT_SYMBOL(set_gptimer_status);
+
+static uint32_t read_gptimer_status(unsigned int timer_id)
+{
+	return bfin_read(&group_regs[BFIN_TIMER_OCTET(timer_id)]->status);
+}
+
+int get_gptimer_intr(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	return !!(read_gptimer_status(timer_id) & timil_mask[timer_id]);
+}
+EXPORT_SYMBOL(get_gptimer_intr);
+
+void clear_gptimer_intr(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	bfin_write(&group_regs[BFIN_TIMER_OCTET(timer_id)]->status, timil_mask[timer_id]);
+}
+EXPORT_SYMBOL(clear_gptimer_intr);
+
+int get_gptimer_over(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	return !!(read_gptimer_status(timer_id) & tovf_mask[timer_id]);
+}
+EXPORT_SYMBOL(get_gptimer_over);
+
+void clear_gptimer_over(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	bfin_write(&group_regs[BFIN_TIMER_OCTET(timer_id)]->status, tovf_mask[timer_id]);
+}
+EXPORT_SYMBOL(clear_gptimer_over);
+
+int get_gptimer_run(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	return !!(read_gptimer_status(timer_id) & trun_mask[timer_id]);
+}
+EXPORT_SYMBOL(get_gptimer_run);
+
+void set_gptimer_config(unsigned int timer_id, uint16_t config)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	bfin_write(&timer_regs[timer_id]->config, config);
+	SSYNC();
+}
+EXPORT_SYMBOL(set_gptimer_config);
+
+uint16_t get_gptimer_config(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	return bfin_read(&timer_regs[timer_id]->config);
+}
+EXPORT_SYMBOL(get_gptimer_config);
+
+void enable_gptimers(uint16_t mask)
+{
+	int i;
+	tassert((mask & ~BLACKFIN_GPTIMER_IDMASK) == 0);
+	for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i) {
+		bfin_write(&group_regs[i]->enable, mask & 0xFF);
+		mask >>= 8;
+	}
+	SSYNC();
+}
+EXPORT_SYMBOL(enable_gptimers);
+
+static void _disable_gptimers(uint16_t mask)
+{
+	int i;
+	uint16_t m = mask;
+	tassert((mask & ~BLACKFIN_GPTIMER_IDMASK) == 0);
+	for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i) {
+		bfin_write(&group_regs[i]->disable, m & 0xFF);
+		m >>= 8;
+	}
+}
+
+void disable_gptimers(uint16_t mask)
+{
+	int i;
+	_disable_gptimers(mask);
+	for (i = 0; i < MAX_BLACKFIN_GPTIMERS; ++i)
+		if (mask & (1 << i))
+			bfin_write(&group_regs[BFIN_TIMER_OCTET(i)]->status, trun_mask[i]);
+	SSYNC();
+}
+EXPORT_SYMBOL(disable_gptimers);
+
+void disable_gptimers_sync(uint16_t mask)
+{
+	_disable_gptimers(mask);
+	SSYNC();
+}
+EXPORT_SYMBOL(disable_gptimers_sync);
+
+void set_gptimer_pulse_hi(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	bfin_write_or(&timer_regs[timer_id]->config, TIMER_PULSE_HI);
+	SSYNC();
+}
+EXPORT_SYMBOL(set_gptimer_pulse_hi);
+
+void clear_gptimer_pulse_hi(unsigned int timer_id)
+{
+	tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
+	bfin_write_and(&timer_regs[timer_id]->config, ~TIMER_PULSE_HI);
+	SSYNC();
+}
+EXPORT_SYMBOL(clear_gptimer_pulse_hi);
+
+uint16_t get_enabled_gptimers(void)
+{
+	int i;
+	uint16_t result = 0;
+	for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i)
+		result |= (bfin_read(&group_regs[i]->enable) << (i << 3));
+	return result;
+}
+EXPORT_SYMBOL(get_enabled_gptimers);
+
+MODULE_AUTHOR("Axel Weiss (awe@aglaia-gmbh.de)");
+MODULE_DESCRIPTION("Blackfin General Purpose Timers API");
+MODULE_LICENSE("GPL");