2 * gptimers.c - Blackfin General Purpose Timer core API
4 * Copyright (c) 2005-2008 Analog Devices Inc.
5 * Copyright (C) 2005 John DeHority
6 * Copyright (C) 2006 Hella Aglaia GmbH (awe@aglaia-gmbh.de)
8 * Licensed under the GPLv2.
11 #include <linux/kernel.h>
12 #include <linux/module.h>
15 #include <asm/blackfin.h>
16 #include <asm/gptimers.h>
19 # define tassert(expr)
21 # define tassert(expr) \
23 printk(KERN_DEBUG "%s:%s:%i: Assertion failed: " #expr "\n", __FILE__, __func__, __LINE__);
26 #define BFIN_TIMER_NUM_GROUP (BFIN_TIMER_OCTET(MAX_BLACKFIN_GPTIMERS - 1) + 1)
28 static struct bfin_gptimer_regs * const timer_regs[MAX_BLACKFIN_GPTIMERS] =
30 (void *)TIMER0_CONFIG,
31 (void *)TIMER1_CONFIG,
32 (void *)TIMER2_CONFIG,
33 #if (MAX_BLACKFIN_GPTIMERS > 3)
34 (void *)TIMER3_CONFIG,
35 (void *)TIMER4_CONFIG,
36 (void *)TIMER5_CONFIG,
37 (void *)TIMER6_CONFIG,
38 (void *)TIMER7_CONFIG,
39 # if (MAX_BLACKFIN_GPTIMERS > 8)
40 (void *)TIMER8_CONFIG,
41 (void *)TIMER9_CONFIG,
42 (void *)TIMER10_CONFIG,
43 # if (MAX_BLACKFIN_GPTIMERS > 11)
44 (void *)TIMER11_CONFIG,
50 static struct bfin_gptimer_group_regs * const group_regs[BFIN_TIMER_NUM_GROUP] =
52 (void *)TIMER0_GROUP_REG,
53 #if (MAX_BLACKFIN_GPTIMERS > 8)
54 (void *)TIMER8_GROUP_REG,
58 static uint32_t const trun_mask[MAX_BLACKFIN_GPTIMERS] =
63 #if (MAX_BLACKFIN_GPTIMERS > 3)
69 # if (MAX_BLACKFIN_GPTIMERS > 8)
73 # if (MAX_BLACKFIN_GPTIMERS > 11)
80 static uint32_t const tovf_mask[MAX_BLACKFIN_GPTIMERS] =
85 #if (MAX_BLACKFIN_GPTIMERS > 3)
91 # if (MAX_BLACKFIN_GPTIMERS > 8)
95 # if (MAX_BLACKFIN_GPTIMERS > 11)
102 static uint32_t const timil_mask[MAX_BLACKFIN_GPTIMERS] =
107 #if (MAX_BLACKFIN_GPTIMERS > 3)
113 # if (MAX_BLACKFIN_GPTIMERS > 8)
116 TIMER_STATUS_TIMIL10,
117 # if (MAX_BLACKFIN_GPTIMERS > 11)
118 TIMER_STATUS_TIMIL11,
124 void set_gptimer_pwidth(unsigned int timer_id, uint32_t value)
126 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
127 timer_regs[timer_id]->width = value;
130 EXPORT_SYMBOL(set_gptimer_pwidth);
132 uint32_t get_gptimer_pwidth(unsigned int timer_id)
134 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
135 return timer_regs[timer_id]->width;
137 EXPORT_SYMBOL(get_gptimer_pwidth);
139 void set_gptimer_period(unsigned int timer_id, uint32_t period)
141 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
142 timer_regs[timer_id]->period = period;
145 EXPORT_SYMBOL(set_gptimer_period);
147 uint32_t get_gptimer_period(unsigned int timer_id)
149 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
150 return timer_regs[timer_id]->period;
152 EXPORT_SYMBOL(get_gptimer_period);
154 uint32_t get_gptimer_count(unsigned int timer_id)
156 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
157 return timer_regs[timer_id]->counter;
159 EXPORT_SYMBOL(get_gptimer_count);
161 uint32_t get_gptimer_status(unsigned int group)
163 tassert(group < BFIN_TIMER_NUM_GROUP);
164 return group_regs[group]->status;
166 EXPORT_SYMBOL(get_gptimer_status);
168 void set_gptimer_status(unsigned int group, uint32_t value)
170 tassert(group < BFIN_TIMER_NUM_GROUP);
171 group_regs[group]->status = value;
174 EXPORT_SYMBOL(set_gptimer_status);
176 int get_gptimer_intr(unsigned int timer_id)
178 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
179 return !!(group_regs[BFIN_TIMER_OCTET(timer_id)]->status & timil_mask[timer_id]);
181 EXPORT_SYMBOL(get_gptimer_intr);
183 void clear_gptimer_intr(unsigned int timer_id)
185 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
186 group_regs[BFIN_TIMER_OCTET(timer_id)]->status = timil_mask[timer_id];
188 EXPORT_SYMBOL(clear_gptimer_intr);
190 int get_gptimer_over(unsigned int timer_id)
192 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
193 return !!(group_regs[BFIN_TIMER_OCTET(timer_id)]->status & tovf_mask[timer_id]);
195 EXPORT_SYMBOL(get_gptimer_over);
197 void clear_gptimer_over(unsigned int timer_id)
199 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
200 group_regs[BFIN_TIMER_OCTET(timer_id)]->status = tovf_mask[timer_id];
202 EXPORT_SYMBOL(clear_gptimer_over);
204 int get_gptimer_run(unsigned int timer_id)
206 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
207 return !!(group_regs[BFIN_TIMER_OCTET(timer_id)]->status & trun_mask[timer_id]);
209 EXPORT_SYMBOL(get_gptimer_run);
211 void set_gptimer_config(unsigned int timer_id, uint16_t config)
213 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
214 timer_regs[timer_id]->config = config;
217 EXPORT_SYMBOL(set_gptimer_config);
219 uint16_t get_gptimer_config(unsigned int timer_id)
221 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
222 return timer_regs[timer_id]->config;
224 EXPORT_SYMBOL(get_gptimer_config);
226 void enable_gptimers(uint16_t mask)
229 tassert((mask & ~BLACKFIN_GPTIMER_IDMASK) == 0);
230 for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i) {
231 group_regs[i]->enable = mask & 0xFF;
236 EXPORT_SYMBOL(enable_gptimers);
238 static void _disable_gptimers(uint16_t mask)
242 tassert((mask & ~BLACKFIN_GPTIMER_IDMASK) == 0);
243 for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i) {
244 group_regs[i]->disable = m & 0xFF;
249 void disable_gptimers(uint16_t mask)
252 _disable_gptimers(mask);
253 for (i = 0; i < MAX_BLACKFIN_GPTIMERS; ++i)
255 group_regs[BFIN_TIMER_OCTET(i)]->status = trun_mask[i];
258 EXPORT_SYMBOL(disable_gptimers);
260 void disable_gptimers_sync(uint16_t mask)
262 _disable_gptimers(mask);
265 EXPORT_SYMBOL(disable_gptimers_sync);
267 void set_gptimer_pulse_hi(unsigned int timer_id)
269 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
270 timer_regs[timer_id]->config |= TIMER_PULSE_HI;
273 EXPORT_SYMBOL(set_gptimer_pulse_hi);
275 void clear_gptimer_pulse_hi(unsigned int timer_id)
277 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
278 timer_regs[timer_id]->config &= ~TIMER_PULSE_HI;
281 EXPORT_SYMBOL(clear_gptimer_pulse_hi);
283 uint16_t get_enabled_gptimers(void)
287 for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i)
288 result |= (group_regs[i]->enable << (i << 3));
291 EXPORT_SYMBOL(get_enabled_gptimers);
293 MODULE_AUTHOR("Axel Weiss (awe@aglaia-gmbh.de)");
294 MODULE_DESCRIPTION("Blackfin General Purpose Timers API");
295 MODULE_LICENSE("GPL");