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author | Mike Frysinger <michael.frysinger@analog.com> | 2007-10-21 23:37:54 +0800 |
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committer | Bryan Wu <bryan.wu@analog.com> | 2007-10-21 23:37:54 +0800 |
commit | 780431e397c82df7e20ee17536b97a08f97ef8ba (patch) | |
tree | 0a119b440b3a20665a25ed89227c6ac5058571ba /arch/blackfin | |
parent | 29cae113720c1520cdcc8b536cf56efcba5d63e0 (diff) | |
download | lwn-780431e397c82df7e20ee17536b97a08f97ef8ba.tar.gz lwn-780431e397c82df7e20ee17536b97a08f97ef8ba.zip |
Blackfin arch: cleanup and promote the general purpose timers api to a core blackfin component
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin')
-rw-r--r-- | arch/blackfin/Kconfig | 10 | ||||
-rw-r--r-- | arch/blackfin/Makefile | 15 | ||||
-rw-r--r-- | arch/blackfin/kernel/Makefile | 1 | ||||
-rw-r--r-- | arch/blackfin/kernel/gptimers.c | 250 |
4 files changed, 274 insertions, 2 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index 178305350993..7888551ed939 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -788,6 +788,16 @@ config LARGE_ALLOCS a lot of RAM, and you need to able to allocate very large contiguous chunks. If unsure, say N. +config BFIN_GPTIMERS + tristate "Enable Blackfin General Purpose Timers API" + default n + help + Enable support for the General Purpose Timers API. If you + are unsure, say N. + + To compile this driver as a module, choose M here: the module + will be called gptimers.ko. + config BFIN_DMA_5XX bool "Enable DMA Support" depends on (BF52x || BF53x || BF561 || BF54x) diff --git a/arch/blackfin/Makefile b/arch/blackfin/Makefile index 4a208f30f5c4..3c87291bcdab 100644 --- a/arch/blackfin/Makefile +++ b/arch/blackfin/Makefile @@ -105,12 +105,23 @@ archclean: $(Q)$(MAKE) $(clean)=$(boot) -all: vmImage boot := arch/$(ARCH)/boot BOOT_TARGETS = vmImage -.PHONY: $(BOOT_TARGETS) +PHONY += $(BOOT_TARGETS) install +KBUILD_IMAGE := $(boot)/vmImage + +all: vmImage + $(BOOT_TARGETS): vmlinux $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +install: + $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install + define archhelp echo '* vmImage - Kernel-only image for U-Boot (arch/$(ARCH)/boot/vmImage)' + echo ' install - Install kernel using' + echo ' (your) ~/bin/$(CROSS_COMPILE)installkernel or' + echo ' (distribution) PATH: $(CROSS_COMPILE)installkernel or' + echo ' install to $$(INSTALL_PATH)' endef diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile index 8aeb6066b19b..8a4cfb293b27 100644 --- a/arch/blackfin/kernel/Makefile +++ b/arch/blackfin/kernel/Makefile @@ -9,6 +9,7 @@ obj-y := \ sys_bfin.o time.o traps.o irqchip.o dma-mapping.o flat.o \ fixed_code.o cplbinit.o cacheinit.o reboot.o bfin_gpio.o +obj-$(CONFIG_BFIN_GPTIMERS) += gptimers.o obj-$(CONFIG_MODULES) += module.o obj-$(CONFIG_BFIN_DMA_5XX) += bfin_dma_5xx.o obj-$(CONFIG_DUAL_CORE_TEST_MODULE) += dualcore_test.o diff --git a/arch/blackfin/kernel/gptimers.c b/arch/blackfin/kernel/gptimers.c new file mode 100644 index 000000000000..cb7ba9bfc79c --- /dev/null +++ b/arch/blackfin/kernel/gptimers.c @@ -0,0 +1,250 @@ +/* + * 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 dis_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 irq_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 & irq_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 = irq_mask[timer_id]; +} +EXPORT_SYMBOL(clear_gptimer_intr); + +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 |= dis_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"); |