4ad1ec7154
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
283 lines
6.5 KiB
C
283 lines
6.5 KiB
C
/*
|
|
* bfin_gptimers.c - derived from bf53x_timers.c
|
|
* Driver for General Purpose Timer functions on the Blackfin processor
|
|
*
|
|
* 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 <asm/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)
|
|
|
|
typedef struct {
|
|
uint16_t config;
|
|
uint16_t __pad;
|
|
uint32_t counter;
|
|
uint32_t period;
|
|
uint32_t width;
|
|
} GPTIMER_timer_regs;
|
|
|
|
typedef struct {
|
|
uint16_t enable;
|
|
uint16_t __pad0;
|
|
uint16_t disable;
|
|
uint16_t __pad1;
|
|
uint32_t status;
|
|
} GPTIMER_group_regs;
|
|
|
|
static volatile GPTIMER_timer_regs *const timer_regs[MAX_BLACKFIN_GPTIMERS] =
|
|
{
|
|
(GPTIMER_timer_regs *)TIMER0_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER1_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER2_CONFIG,
|
|
#if (MAX_BLACKFIN_GPTIMERS > 3)
|
|
(GPTIMER_timer_regs *)TIMER3_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER4_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER5_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER6_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER7_CONFIG,
|
|
#endif
|
|
#if (MAX_BLACKFIN_GPTIMERS > 8)
|
|
(GPTIMER_timer_regs *)TIMER8_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER9_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER10_CONFIG,
|
|
(GPTIMER_timer_regs *)TIMER11_CONFIG,
|
|
#endif
|
|
};
|
|
|
|
static volatile GPTIMER_group_regs *const group_regs[BFIN_TIMER_NUM_GROUP] =
|
|
{
|
|
(GPTIMER_group_regs *)TIMER0_GROUP_REG,
|
|
#if (MAX_BLACKFIN_GPTIMERS > 8)
|
|
(GPTIMER_group_regs *)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,
|
|
#endif
|
|
#if (MAX_BLACKFIN_GPTIMERS > 8)
|
|
TIMER_STATUS_TRUN8,
|
|
TIMER_STATUS_TRUN9,
|
|
TIMER_STATUS_TRUN10,
|
|
TIMER_STATUS_TRUN11,
|
|
#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,
|
|
#endif
|
|
#if (MAX_BLACKFIN_GPTIMERS > 8)
|
|
TIMER_STATUS_TOVF8,
|
|
TIMER_STATUS_TOVF9,
|
|
TIMER_STATUS_TOVF10,
|
|
TIMER_STATUS_TOVF11,
|
|
#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,
|
|
#endif
|
|
#if (MAX_BLACKFIN_GPTIMERS > 8)
|
|
TIMER_STATUS_TIMIL8,
|
|
TIMER_STATUS_TIMIL9,
|
|
TIMER_STATUS_TIMIL10,
|
|
TIMER_STATUS_TIMIL11,
|
|
#endif
|
|
};
|
|
|
|
void set_gptimer_pwidth(int timer_id, uint32_t value)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
timer_regs[timer_id]->width = value;
|
|
SSYNC();
|
|
}
|
|
EXPORT_SYMBOL(set_gptimer_pwidth);
|
|
|
|
uint32_t get_gptimer_pwidth(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
return timer_regs[timer_id]->width;
|
|
}
|
|
EXPORT_SYMBOL(get_gptimer_pwidth);
|
|
|
|
void set_gptimer_period(int timer_id, uint32_t period)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
timer_regs[timer_id]->period = period;
|
|
SSYNC();
|
|
}
|
|
EXPORT_SYMBOL(set_gptimer_period);
|
|
|
|
uint32_t get_gptimer_period(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
return timer_regs[timer_id]->period;
|
|
}
|
|
EXPORT_SYMBOL(get_gptimer_period);
|
|
|
|
uint32_t get_gptimer_count(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
return timer_regs[timer_id]->counter;
|
|
}
|
|
EXPORT_SYMBOL(get_gptimer_count);
|
|
|
|
uint32_t get_gptimer_status(int group)
|
|
{
|
|
tassert(group < BFIN_TIMER_NUM_GROUP);
|
|
return group_regs[group]->status;
|
|
}
|
|
EXPORT_SYMBOL(get_gptimer_status);
|
|
|
|
void set_gptimer_status(int group, uint32_t value)
|
|
{
|
|
tassert(group < BFIN_TIMER_NUM_GROUP);
|
|
group_regs[group]->status = value;
|
|
SSYNC();
|
|
}
|
|
EXPORT_SYMBOL(set_gptimer_status);
|
|
|
|
uint16_t get_gptimer_intr(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
return (group_regs[BFIN_TIMER_OCTET(timer_id)]->status & timil_mask[timer_id]) ? 1 : 0;
|
|
}
|
|
EXPORT_SYMBOL(get_gptimer_intr);
|
|
|
|
void clear_gptimer_intr(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
group_regs[BFIN_TIMER_OCTET(timer_id)]->status = timil_mask[timer_id];
|
|
}
|
|
EXPORT_SYMBOL(clear_gptimer_intr);
|
|
|
|
uint16_t get_gptimer_over(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
return (group_regs[BFIN_TIMER_OCTET(timer_id)]->status & tovf_mask[timer_id]) ? 1 : 0;
|
|
}
|
|
EXPORT_SYMBOL(get_gptimer_over);
|
|
|
|
void clear_gptimer_over(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
group_regs[BFIN_TIMER_OCTET(timer_id)]->status = tovf_mask[timer_id];
|
|
}
|
|
EXPORT_SYMBOL(clear_gptimer_over);
|
|
|
|
void set_gptimer_config(int timer_id, uint16_t config)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
timer_regs[timer_id]->config = config;
|
|
SSYNC();
|
|
}
|
|
EXPORT_SYMBOL(set_gptimer_config);
|
|
|
|
uint16_t get_gptimer_config(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
return 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) {
|
|
group_regs[i]->enable = mask & 0xFF;
|
|
mask >>= 8;
|
|
}
|
|
SSYNC();
|
|
}
|
|
EXPORT_SYMBOL(enable_gptimers);
|
|
|
|
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) {
|
|
group_regs[i]->disable = m & 0xFF;
|
|
m >>= 8;
|
|
}
|
|
for (i = 0; i < MAX_BLACKFIN_GPTIMERS; ++i)
|
|
if (mask & (1 << i))
|
|
group_regs[BFIN_TIMER_OCTET(i)]->status |= trun_mask[i];
|
|
SSYNC();
|
|
}
|
|
EXPORT_SYMBOL(disable_gptimers);
|
|
|
|
void set_gptimer_pulse_hi(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
timer_regs[timer_id]->config |= TIMER_PULSE_HI;
|
|
SSYNC();
|
|
}
|
|
EXPORT_SYMBOL(set_gptimer_pulse_hi);
|
|
|
|
void clear_gptimer_pulse_hi(int timer_id)
|
|
{
|
|
tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
|
|
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 |= (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");
|