Blackfin arch: cleanup and promote the general purpose timers api to a core blackfin component

Signed-off-by: NMike Frysinger <michael.frysinger@analog.com>
Signed-off-by: NBryan Wu <bryan.wu@analog.com>

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)

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

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

arch/blackfin/kernel/gptimers.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 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");

include/asm-blackfin/bf5xx_timers.h → include/asm-blackfin/gptimers.h

@@ -12,9 +12,11 @@
 #ifndef _BLACKFIN_TIMERS_H_
 #define _BLACKFIN_TIMERS_H_
 
-#undef MAX_BLACKFIN_GPTIMERS
+#include <linux/types.h>
+#include <asm/blackfin.h>
+
 /*
- * BF537: 8 timers:
+ * BF537/BF527: 8 timers:
  */
 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
 # define MAX_BLACKFIN_GPTIMERS 8
@@ -101,8 +103,8 @@
 #endif
 
 /*
-** Timer Configuration Register Bits
-*/
+ * Timer Configuration Register Bits
+ */
 #define TIMER_ERR           0xC000
 #define TIMER_ERR_OVFL      0x4000
 #define TIMER_ERR_PROG_PER  0x8000
@@ -121,8 +123,8 @@
 #define TIMER_MODE_EXT_CLK  0x0003
 
 /*
-** Timer Status Register Bits
-*/
+ * Timer Status Register Bits
+ */
 #define TIMER_STATUS_TIMIL0 0x0001
 #define TIMER_STATUS_TIMIL1 0x0002
 #define TIMER_STATUS_TIMIL2 0x0004
@@ -164,8 +166,8 @@
 #endif
 
 /*
-** Timer Slave Enable Status : write 1 to clear
-*/
+ * Timer Slave Enable Status : write 1 to clear
+ */
 #define TIMER_STATUS_TRUN0  0x1000
 #define TIMER_STATUS_TRUN1  0x2000
 #define TIMER_STATUS_TRUN2  0x4000
@@ -186,24 +188,23 @@
 # define TIMER_STATUS_TRUN   0x7000
 #endif
 
-/*******************************************************************************
-*	GP_TIMER API's
-*******************************************************************************/
-
-void  set_gptimer_pwidth    (int timer_id, int width);
-int   get_gptimer_pwidth    (int timer_id);
-void  set_gptimer_period    (int timer_id, int period);
-int   get_gptimer_period    (int timer_id);
-int   get_gptimer_count     (int timer_id);
-short get_gptimer_intr      (int timer_id);
-void  set_gptimer_config    (int timer_id, short config);
-short get_gptimer_config    (int timer_id);
+/* The actual gptimer API */
+
+void     set_gptimer_pwidth    (int timer_id, uint32_t width);
+uint32_t get_gptimer_pwidth    (int timer_id);
+void     set_gptimer_period    (int timer_id, uint32_t period);
+uint32_t get_gptimer_period    (int timer_id);
+uint32_t get_gptimer_count     (int timer_id);
+uint16_t get_gptimer_intr      (int timer_id);
+void     clear_gptimer_intr    (int timer_id);
+void     set_gptimer_config    (int timer_id, uint16_t config);
+uint16_t get_gptimer_config    (int timer_id);
 void     set_gptimer_pulse_hi  (int timer_id);
 void     clear_gptimer_pulse_hi(int timer_id);
-void  enable_gptimers       (short mask);
-void  disable_gptimers      (short mask);
-short get_enabled_timers    (void);
-int   get_gptimer_status    (int octet);
-void  set_gptimer_status    (int octet, int value);
+void     enable_gptimers       (uint16_t mask);
+void     disable_gptimers      (uint16_t mask);
+uint16_t get_enabled_gptimers  (void);
+uint32_t get_gptimer_status    (int group);
+void     set_gptimer_status    (int group, uint32_t value);
 
 #endif