diff options
Diffstat (limited to 'arch/blackfin/kernel/gptimers.c')
| -rw-r--r-- | arch/blackfin/kernel/gptimers.c | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/gptimers.c b/arch/blackfin/kernel/gptimers.c new file mode 100644 index 000000000..d776773d3 --- /dev/null +++ b/arch/blackfin/kernel/gptimers.c @@ -0,0 +1,383 @@ +/* + * 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 + +#ifndef CONFIG_BF60x +# define BFIN_TIMER_NUM_GROUP (BFIN_TIMER_OCTET(MAX_BLACKFIN_GPTIMERS - 1) + 1) +#else +# define BFIN_TIMER_NUM_GROUP 1 +#endif + +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); + +#ifdef CONFIG_BF60x +void set_gptimer_delay(unsigned int timer_id, uint32_t delay) +{ + tassert(timer_id < MAX_BLACKFIN_GPTIMERS); + bfin_write(&timer_regs[timer_id]->delay, delay); + SSYNC(); +} +EXPORT_SYMBOL(set_gptimer_delay); + +uint32_t get_gptimer_delay(unsigned int timer_id) +{ + tassert(timer_id < MAX_BLACKFIN_GPTIMERS); + return bfin_read(&timer_regs[timer_id]->delay); +} +EXPORT_SYMBOL(get_gptimer_delay); +#endif + +#ifdef CONFIG_BF60x +int get_gptimer_intr(unsigned int timer_id) +{ + tassert(timer_id < MAX_BLACKFIN_GPTIMERS); + return !!(bfin_read(&group_regs[BFIN_TIMER_OCTET(timer_id)]->data_ilat) & 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)]->data_ilat, timil_mask[timer_id]); +} +EXPORT_SYMBOL(clear_gptimer_intr); + +int get_gptimer_over(unsigned int timer_id) +{ + tassert(timer_id < MAX_BLACKFIN_GPTIMERS); + return !!(bfin_read(&group_regs[BFIN_TIMER_OCTET(timer_id)]->stat_ilat) & 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)]->stat_ilat, tovf_mask[timer_id]); +} +EXPORT_SYMBOL(clear_gptimer_over); + +int get_gptimer_run(unsigned int timer_id) +{ + tassert(timer_id < MAX_BLACKFIN_GPTIMERS); + return !!(bfin_read(&group_regs[BFIN_TIMER_OCTET(timer_id)]->run) & trun_mask[timer_id]); +} +EXPORT_SYMBOL(get_gptimer_run); + +uint32_t get_gptimer_status(unsigned int group) +{ + tassert(group < BFIN_TIMER_NUM_GROUP); + return bfin_read(&group_regs[group]->data_ilat); +} +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]->data_ilat, value); + SSYNC(); +} +EXPORT_SYMBOL(set_gptimer_status); +#else +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); +#endif + +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; +#ifdef CONFIG_BF60x + uint16_t imask; + imask = bfin_read16(TIMER_DATA_IMSK); + imask &= ~mask; + bfin_write16(TIMER_DATA_IMSK, imask); +#endif + 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) +{ +#ifndef CONFIG_BF60x + 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(); +#else + _disable_gptimers(mask); +#endif +} +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"); |