1
2
3
4
5
6
7
8
9
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/io.h>
14
15#include <asm/blackfin.h>
16#include <asm/gptimers.h>
17
18#ifdef DEBUG
19# define tassert(expr)
20#else
21# define tassert(expr) \
22 if (!(expr)) \
23 printk(KERN_DEBUG "%s:%s:%i: Assertion failed: " #expr "\n", __FILE__, __func__, __LINE__);
24#endif
25
26#ifndef CONFIG_BF60x
27# define BFIN_TIMER_NUM_GROUP (BFIN_TIMER_OCTET(MAX_BLACKFIN_GPTIMERS - 1) + 1)
28#else
29# define BFIN_TIMER_NUM_GROUP 1
30#endif
31
32static struct bfin_gptimer_regs * const timer_regs[MAX_BLACKFIN_GPTIMERS] =
33{
34 (void *)TIMER0_CONFIG,
35 (void *)TIMER1_CONFIG,
36 (void *)TIMER2_CONFIG,
37#if (MAX_BLACKFIN_GPTIMERS > 3)
38 (void *)TIMER3_CONFIG,
39 (void *)TIMER4_CONFIG,
40 (void *)TIMER5_CONFIG,
41 (void *)TIMER6_CONFIG,
42 (void *)TIMER7_CONFIG,
43# if (MAX_BLACKFIN_GPTIMERS > 8)
44 (void *)TIMER8_CONFIG,
45 (void *)TIMER9_CONFIG,
46 (void *)TIMER10_CONFIG,
47# if (MAX_BLACKFIN_GPTIMERS > 11)
48 (void *)TIMER11_CONFIG,
49# endif
50# endif
51#endif
52};
53
54static struct bfin_gptimer_group_regs * const group_regs[BFIN_TIMER_NUM_GROUP] =
55{
56 (void *)TIMER0_GROUP_REG,
57#if (MAX_BLACKFIN_GPTIMERS > 8)
58 (void *)TIMER8_GROUP_REG,
59#endif
60};
61
62static uint32_t const trun_mask[MAX_BLACKFIN_GPTIMERS] =
63{
64 TIMER_STATUS_TRUN0,
65 TIMER_STATUS_TRUN1,
66 TIMER_STATUS_TRUN2,
67#if (MAX_BLACKFIN_GPTIMERS > 3)
68 TIMER_STATUS_TRUN3,
69 TIMER_STATUS_TRUN4,
70 TIMER_STATUS_TRUN5,
71 TIMER_STATUS_TRUN6,
72 TIMER_STATUS_TRUN7,
73# if (MAX_BLACKFIN_GPTIMERS > 8)
74 TIMER_STATUS_TRUN8,
75 TIMER_STATUS_TRUN9,
76 TIMER_STATUS_TRUN10,
77# if (MAX_BLACKFIN_GPTIMERS > 11)
78 TIMER_STATUS_TRUN11,
79# endif
80# endif
81#endif
82};
83
84static uint32_t const tovf_mask[MAX_BLACKFIN_GPTIMERS] =
85{
86 TIMER_STATUS_TOVF0,
87 TIMER_STATUS_TOVF1,
88 TIMER_STATUS_TOVF2,
89#if (MAX_BLACKFIN_GPTIMERS > 3)
90 TIMER_STATUS_TOVF3,
91 TIMER_STATUS_TOVF4,
92 TIMER_STATUS_TOVF5,
93 TIMER_STATUS_TOVF6,
94 TIMER_STATUS_TOVF7,
95# if (MAX_BLACKFIN_GPTIMERS > 8)
96 TIMER_STATUS_TOVF8,
97 TIMER_STATUS_TOVF9,
98 TIMER_STATUS_TOVF10,
99# if (MAX_BLACKFIN_GPTIMERS > 11)
100 TIMER_STATUS_TOVF11,
101# endif
102# endif
103#endif
104};
105
106static uint32_t const timil_mask[MAX_BLACKFIN_GPTIMERS] =
107{
108 TIMER_STATUS_TIMIL0,
109 TIMER_STATUS_TIMIL1,
110 TIMER_STATUS_TIMIL2,
111#if (MAX_BLACKFIN_GPTIMERS > 3)
112 TIMER_STATUS_TIMIL3,
113 TIMER_STATUS_TIMIL4,
114 TIMER_STATUS_TIMIL5,
115 TIMER_STATUS_TIMIL6,
116 TIMER_STATUS_TIMIL7,
117# if (MAX_BLACKFIN_GPTIMERS > 8)
118 TIMER_STATUS_TIMIL8,
119 TIMER_STATUS_TIMIL9,
120 TIMER_STATUS_TIMIL10,
121# if (MAX_BLACKFIN_GPTIMERS > 11)
122 TIMER_STATUS_TIMIL11,
123# endif
124# endif
125#endif
126};
127
128void set_gptimer_pwidth(unsigned int timer_id, uint32_t value)
129{
130 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
131 bfin_write(&timer_regs[timer_id]->width, value);
132 SSYNC();
133}
134EXPORT_SYMBOL(set_gptimer_pwidth);
135
136uint32_t get_gptimer_pwidth(unsigned int timer_id)
137{
138 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
139 return bfin_read(&timer_regs[timer_id]->width);
140}
141EXPORT_SYMBOL(get_gptimer_pwidth);
142
143void set_gptimer_period(unsigned int timer_id, uint32_t period)
144{
145 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
146 bfin_write(&timer_regs[timer_id]->period, period);
147 SSYNC();
148}
149EXPORT_SYMBOL(set_gptimer_period);
150
151uint32_t get_gptimer_period(unsigned int timer_id)
152{
153 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
154 return bfin_read(&timer_regs[timer_id]->period);
155}
156EXPORT_SYMBOL(get_gptimer_period);
157
158uint32_t get_gptimer_count(unsigned int timer_id)
159{
160 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
161 return bfin_read(&timer_regs[timer_id]->counter);
162}
163EXPORT_SYMBOL(get_gptimer_count);
164
165#ifdef CONFIG_BF60x
166void set_gptimer_delay(unsigned int timer_id, uint32_t delay)
167{
168 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
169 bfin_write(&timer_regs[timer_id]->delay, delay);
170 SSYNC();
171}
172EXPORT_SYMBOL(set_gptimer_delay);
173
174uint32_t get_gptimer_delay(unsigned int timer_id)
175{
176 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
177 return bfin_read(&timer_regs[timer_id]->delay);
178}
179EXPORT_SYMBOL(get_gptimer_delay);
180#endif
181
182#ifdef CONFIG_BF60x
183int get_gptimer_intr(unsigned int timer_id)
184{
185 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
186 return !!(bfin_read(&group_regs[BFIN_TIMER_OCTET(timer_id)]->data_ilat) & timil_mask[timer_id]);
187}
188EXPORT_SYMBOL(get_gptimer_intr);
189
190void clear_gptimer_intr(unsigned int timer_id)
191{
192 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
193 bfin_write(&group_regs[BFIN_TIMER_OCTET(timer_id)]->data_ilat, timil_mask[timer_id]);
194}
195EXPORT_SYMBOL(clear_gptimer_intr);
196
197int get_gptimer_over(unsigned int timer_id)
198{
199 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
200 return !!(bfin_read(&group_regs[BFIN_TIMER_OCTET(timer_id)]->stat_ilat) & tovf_mask[timer_id]);
201}
202EXPORT_SYMBOL(get_gptimer_over);
203
204void clear_gptimer_over(unsigned int timer_id)
205{
206 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
207 bfin_write(&group_regs[BFIN_TIMER_OCTET(timer_id)]->stat_ilat, tovf_mask[timer_id]);
208}
209EXPORT_SYMBOL(clear_gptimer_over);
210
211int get_gptimer_run(unsigned int timer_id)
212{
213 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
214 return !!(bfin_read(&group_regs[BFIN_TIMER_OCTET(timer_id)]->run) & trun_mask[timer_id]);
215}
216EXPORT_SYMBOL(get_gptimer_run);
217
218uint32_t get_gptimer_status(unsigned int group)
219{
220 tassert(group < BFIN_TIMER_NUM_GROUP);
221 return bfin_read(&group_regs[group]->data_ilat);
222}
223EXPORT_SYMBOL(get_gptimer_status);
224
225void set_gptimer_status(unsigned int group, uint32_t value)
226{
227 tassert(group < BFIN_TIMER_NUM_GROUP);
228 bfin_write(&group_regs[group]->data_ilat, value);
229 SSYNC();
230}
231EXPORT_SYMBOL(set_gptimer_status);
232#else
233uint32_t get_gptimer_status(unsigned int group)
234{
235 tassert(group < BFIN_TIMER_NUM_GROUP);
236 return bfin_read(&group_regs[group]->status);
237}
238EXPORT_SYMBOL(get_gptimer_status);
239
240void set_gptimer_status(unsigned int group, uint32_t value)
241{
242 tassert(group < BFIN_TIMER_NUM_GROUP);
243 bfin_write(&group_regs[group]->status, value);
244 SSYNC();
245}
246EXPORT_SYMBOL(set_gptimer_status);
247
248static uint32_t read_gptimer_status(unsigned int timer_id)
249{
250 return bfin_read(&group_regs[BFIN_TIMER_OCTET(timer_id)]->status);
251}
252
253int get_gptimer_intr(unsigned int timer_id)
254{
255 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
256 return !!(read_gptimer_status(timer_id) & timil_mask[timer_id]);
257}
258EXPORT_SYMBOL(get_gptimer_intr);
259
260void clear_gptimer_intr(unsigned int timer_id)
261{
262 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
263 bfin_write(&group_regs[BFIN_TIMER_OCTET(timer_id)]->status, timil_mask[timer_id]);
264}
265EXPORT_SYMBOL(clear_gptimer_intr);
266
267int get_gptimer_over(unsigned int timer_id)
268{
269 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
270 return !!(read_gptimer_status(timer_id) & tovf_mask[timer_id]);
271}
272EXPORT_SYMBOL(get_gptimer_over);
273
274void clear_gptimer_over(unsigned int timer_id)
275{
276 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
277 bfin_write(&group_regs[BFIN_TIMER_OCTET(timer_id)]->status, tovf_mask[timer_id]);
278}
279EXPORT_SYMBOL(clear_gptimer_over);
280
281int get_gptimer_run(unsigned int timer_id)
282{
283 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
284 return !!(read_gptimer_status(timer_id) & trun_mask[timer_id]);
285}
286EXPORT_SYMBOL(get_gptimer_run);
287#endif
288
289void set_gptimer_config(unsigned int timer_id, uint16_t config)
290{
291 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
292 bfin_write(&timer_regs[timer_id]->config, config);
293 SSYNC();
294}
295EXPORT_SYMBOL(set_gptimer_config);
296
297uint16_t get_gptimer_config(unsigned int timer_id)
298{
299 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
300 return bfin_read(&timer_regs[timer_id]->config);
301}
302EXPORT_SYMBOL(get_gptimer_config);
303
304void enable_gptimers(uint16_t mask)
305{
306 int i;
307#ifdef CONFIG_BF60x
308 uint16_t imask;
309 imask = bfin_read16(TIMER_DATA_IMSK);
310 imask &= ~mask;
311 bfin_write16(TIMER_DATA_IMSK, imask);
312#endif
313 tassert((mask & ~BLACKFIN_GPTIMER_IDMASK) == 0);
314 for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i) {
315 bfin_write(&group_regs[i]->enable, mask & 0xFF);
316 mask >>= 8;
317 }
318 SSYNC();
319}
320EXPORT_SYMBOL(enable_gptimers);
321
322static void _disable_gptimers(uint16_t mask)
323{
324 int i;
325 uint16_t m = mask;
326 tassert((mask & ~BLACKFIN_GPTIMER_IDMASK) == 0);
327 for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i) {
328 bfin_write(&group_regs[i]->disable, m & 0xFF);
329 m >>= 8;
330 }
331}
332
333void disable_gptimers(uint16_t mask)
334{
335#ifndef CONFIG_BF60x
336 int i;
337 _disable_gptimers(mask);
338 for (i = 0; i < MAX_BLACKFIN_GPTIMERS; ++i)
339 if (mask & (1 << i))
340 bfin_write(&group_regs[BFIN_TIMER_OCTET(i)]->status, trun_mask[i]);
341 SSYNC();
342#else
343 _disable_gptimers(mask);
344#endif
345}
346EXPORT_SYMBOL(disable_gptimers);
347
348void disable_gptimers_sync(uint16_t mask)
349{
350 _disable_gptimers(mask);
351 SSYNC();
352}
353EXPORT_SYMBOL(disable_gptimers_sync);
354
355void set_gptimer_pulse_hi(unsigned int timer_id)
356{
357 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
358 bfin_write_or(&timer_regs[timer_id]->config, TIMER_PULSE_HI);
359 SSYNC();
360}
361EXPORT_SYMBOL(set_gptimer_pulse_hi);
362
363void clear_gptimer_pulse_hi(unsigned int timer_id)
364{
365 tassert(timer_id < MAX_BLACKFIN_GPTIMERS);
366 bfin_write_and(&timer_regs[timer_id]->config, ~TIMER_PULSE_HI);
367 SSYNC();
368}
369EXPORT_SYMBOL(clear_gptimer_pulse_hi);
370
371uint16_t get_enabled_gptimers(void)
372{
373 int i;
374 uint16_t result = 0;
375 for (i = 0; i < BFIN_TIMER_NUM_GROUP; ++i)
376 result |= (bfin_read(&group_regs[i]->enable) << (i << 3));
377 return result;
378}
379EXPORT_SYMBOL(get_enabled_gptimers);
380
381MODULE_AUTHOR("Axel Weiss (awe@aglaia-gmbh.de)");
382MODULE_DESCRIPTION("Blackfin General Purpose Timers API");
383MODULE_LICENSE("GPL");
384
