Commit | Line | Data |
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317a6104 PM |
1 | /* |
2 | * SuperH On-Chip RTC Support | |
3 | * | |
4 | * Copyright (C) 2006 Paul Mundt | |
1b73e6ae | 5 | * Copyright (C) 2006 Jamie Lenehan |
317a6104 PM |
6 | * |
7 | * Based on the old arch/sh/kernel/cpu/rtc.c by: | |
8 | * | |
9 | * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> | |
10 | * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka | |
11 | * | |
12 | * This file is subject to the terms and conditions of the GNU General Public | |
13 | * License. See the file "COPYING" in the main directory of this archive | |
14 | * for more details. | |
15 | */ | |
16 | #include <linux/module.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/bcd.h> | |
19 | #include <linux/rtc.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/seq_file.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/spinlock.h> | |
31ccb081 | 25 | #include <linux/io.h> |
317a6104 | 26 | |
1b73e6ae JL |
27 | #define DRV_NAME "sh-rtc" |
28 | #define DRV_VERSION "0.1.2" | |
29 | ||
317a6104 PM |
30 | #ifdef CONFIG_CPU_SH3 |
31 | #define rtc_reg_size sizeof(u16) | |
32 | #define RTC_BIT_INVERTED 0 /* No bug on SH7708, SH7709A */ | |
33 | #elif defined(CONFIG_CPU_SH4) | |
34 | #define rtc_reg_size sizeof(u32) | |
35 | #define RTC_BIT_INVERTED 0x40 /* bug on SH7750, SH7750S */ | |
36 | #endif | |
37 | ||
38 | #define RTC_REG(r) ((r) * rtc_reg_size) | |
39 | ||
31ccb081 | 40 | #define R64CNT RTC_REG(0) |
1b73e6ae JL |
41 | |
42 | #define RSECCNT RTC_REG(1) /* RTC sec */ | |
43 | #define RMINCNT RTC_REG(2) /* RTC min */ | |
44 | #define RHRCNT RTC_REG(3) /* RTC hour */ | |
45 | #define RWKCNT RTC_REG(4) /* RTC week */ | |
46 | #define RDAYCNT RTC_REG(5) /* RTC day */ | |
47 | #define RMONCNT RTC_REG(6) /* RTC month */ | |
48 | #define RYRCNT RTC_REG(7) /* RTC year */ | |
49 | #define RSECAR RTC_REG(8) /* ALARM sec */ | |
50 | #define RMINAR RTC_REG(9) /* ALARM min */ | |
51 | #define RHRAR RTC_REG(10) /* ALARM hour */ | |
52 | #define RWKAR RTC_REG(11) /* ALARM week */ | |
53 | #define RDAYAR RTC_REG(12) /* ALARM day */ | |
54 | #define RMONAR RTC_REG(13) /* ALARM month */ | |
55 | #define RCR1 RTC_REG(14) /* Control */ | |
56 | #define RCR2 RTC_REG(15) /* Control */ | |
57 | ||
58 | /* ALARM Bits - or with BCD encoded value */ | |
59 | #define AR_ENB 0x80 /* Enable for alarm cmp */ | |
317a6104 PM |
60 | |
61 | /* RCR1 Bits */ | |
62 | #define RCR1_CF 0x80 /* Carry Flag */ | |
63 | #define RCR1_CIE 0x10 /* Carry Interrupt Enable */ | |
64 | #define RCR1_AIE 0x08 /* Alarm Interrupt Enable */ | |
65 | #define RCR1_AF 0x01 /* Alarm Flag */ | |
66 | ||
67 | /* RCR2 Bits */ | |
68 | #define RCR2_PEF 0x80 /* PEriodic interrupt Flag */ | |
69 | #define RCR2_PESMASK 0x70 /* Periodic interrupt Set */ | |
70 | #define RCR2_RTCEN 0x08 /* ENable RTC */ | |
71 | #define RCR2_ADJ 0x04 /* ADJustment (30-second) */ | |
72 | #define RCR2_RESET 0x02 /* Reset bit */ | |
73 | #define RCR2_START 0x01 /* Start bit */ | |
74 | ||
75 | struct sh_rtc { | |
76 | void __iomem *regbase; | |
77 | unsigned long regsize; | |
78 | struct resource *res; | |
79 | unsigned int alarm_irq, periodic_irq, carry_irq; | |
80 | struct rtc_device *rtc_dev; | |
81 | spinlock_t lock; | |
1b73e6ae | 82 | int rearm_aie; |
317a6104 PM |
83 | }; |
84 | ||
31ccb081 | 85 | static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id) |
317a6104 | 86 | { |
31ccb081 | 87 | struct platform_device *pdev = to_platform_device(dev_id); |
317a6104 PM |
88 | struct sh_rtc *rtc = platform_get_drvdata(pdev); |
89 | unsigned int tmp, events = 0; | |
90 | ||
91 | spin_lock(&rtc->lock); | |
92 | ||
93 | tmp = readb(rtc->regbase + RCR1); | |
1b73e6ae | 94 | tmp &= ~RCR1_CF; |
317a6104 | 95 | |
1b73e6ae JL |
96 | if (rtc->rearm_aie) { |
97 | if (tmp & RCR1_AF) | |
98 | tmp &= ~RCR1_AF; /* try to clear AF again */ | |
99 | else { | |
100 | tmp |= RCR1_AIE; /* AF has cleared, rearm IRQ */ | |
101 | rtc->rearm_aie = 0; | |
102 | } | |
103 | } | |
317a6104 PM |
104 | |
105 | writeb(tmp, rtc->regbase + RCR1); | |
106 | ||
a361a68b | 107 | rtc_update_irq(rtc->rtc_dev, 1, events); |
317a6104 PM |
108 | |
109 | spin_unlock(&rtc->lock); | |
110 | ||
111 | return IRQ_HANDLED; | |
112 | } | |
113 | ||
1b73e6ae JL |
114 | static irqreturn_t sh_rtc_alarm(int irq, void *dev_id) |
115 | { | |
116 | struct platform_device *pdev = to_platform_device(dev_id); | |
117 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
118 | unsigned int tmp, events = 0; | |
119 | ||
120 | spin_lock(&rtc->lock); | |
121 | ||
122 | tmp = readb(rtc->regbase + RCR1); | |
123 | ||
124 | /* | |
125 | * If AF is set then the alarm has triggered. If we clear AF while | |
126 | * the alarm time still matches the RTC time then AF will | |
127 | * immediately be set again, and if AIE is enabled then the alarm | |
128 | * interrupt will immediately be retrigger. So we clear AIE here | |
129 | * and use rtc->rearm_aie so that the carry interrupt will keep | |
130 | * trying to clear AF and once it stays cleared it'll re-enable | |
131 | * AIE. | |
132 | */ | |
133 | if (tmp & RCR1_AF) { | |
134 | events |= RTC_AF | RTC_IRQF; | |
135 | ||
136 | tmp &= ~(RCR1_AF|RCR1_AIE); | |
137 | ||
138 | writeb(tmp, rtc->regbase + RCR1); | |
139 | ||
140 | rtc->rearm_aie = 1; | |
141 | ||
a361a68b | 142 | rtc_update_irq(rtc->rtc_dev, 1, events); |
1b73e6ae JL |
143 | } |
144 | ||
145 | spin_unlock(&rtc->lock); | |
146 | return IRQ_HANDLED; | |
147 | } | |
148 | ||
31ccb081 | 149 | static irqreturn_t sh_rtc_periodic(int irq, void *dev_id) |
317a6104 | 150 | { |
31ccb081 JL |
151 | struct platform_device *pdev = to_platform_device(dev_id); |
152 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
317a6104 PM |
153 | |
154 | spin_lock(&rtc->lock); | |
155 | ||
a361a68b | 156 | rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF); |
317a6104 PM |
157 | |
158 | spin_unlock(&rtc->lock); | |
159 | ||
160 | return IRQ_HANDLED; | |
161 | } | |
162 | ||
163 | static inline void sh_rtc_setpie(struct device *dev, unsigned int enable) | |
164 | { | |
165 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
166 | unsigned int tmp; | |
167 | ||
168 | spin_lock_irq(&rtc->lock); | |
169 | ||
170 | tmp = readb(rtc->regbase + RCR2); | |
171 | ||
172 | if (enable) { | |
173 | tmp &= ~RCR2_PESMASK; | |
174 | tmp |= RCR2_PEF | (2 << 4); | |
175 | } else | |
176 | tmp &= ~(RCR2_PESMASK | RCR2_PEF); | |
177 | ||
178 | writeb(tmp, rtc->regbase + RCR2); | |
179 | ||
180 | spin_unlock_irq(&rtc->lock); | |
181 | } | |
182 | ||
183 | static inline void sh_rtc_setaie(struct device *dev, unsigned int enable) | |
184 | { | |
185 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
186 | unsigned int tmp; | |
187 | ||
188 | spin_lock_irq(&rtc->lock); | |
189 | ||
190 | tmp = readb(rtc->regbase + RCR1); | |
191 | ||
1b73e6ae | 192 | if (!enable) { |
317a6104 | 193 | tmp &= ~RCR1_AIE; |
1b73e6ae JL |
194 | rtc->rearm_aie = 0; |
195 | } else if (rtc->rearm_aie == 0) | |
196 | tmp |= RCR1_AIE; | |
317a6104 PM |
197 | |
198 | writeb(tmp, rtc->regbase + RCR1); | |
199 | ||
200 | spin_unlock_irq(&rtc->lock); | |
201 | } | |
202 | ||
203 | static int sh_rtc_open(struct device *dev) | |
204 | { | |
205 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
206 | unsigned int tmp; | |
207 | int ret; | |
208 | ||
209 | tmp = readb(rtc->regbase + RCR1); | |
210 | tmp &= ~RCR1_CF; | |
211 | tmp |= RCR1_CIE; | |
212 | writeb(tmp, rtc->regbase + RCR1); | |
213 | ||
35f3c518 | 214 | ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, IRQF_DISABLED, |
317a6104 PM |
215 | "sh-rtc period", dev); |
216 | if (unlikely(ret)) { | |
217 | dev_err(dev, "request period IRQ failed with %d, IRQ %d\n", | |
218 | ret, rtc->periodic_irq); | |
219 | return ret; | |
220 | } | |
221 | ||
35f3c518 | 222 | ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, IRQF_DISABLED, |
317a6104 PM |
223 | "sh-rtc carry", dev); |
224 | if (unlikely(ret)) { | |
225 | dev_err(dev, "request carry IRQ failed with %d, IRQ %d\n", | |
226 | ret, rtc->carry_irq); | |
227 | free_irq(rtc->periodic_irq, dev); | |
228 | goto err_bad_carry; | |
229 | } | |
230 | ||
1b73e6ae | 231 | ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, IRQF_DISABLED, |
317a6104 PM |
232 | "sh-rtc alarm", dev); |
233 | if (unlikely(ret)) { | |
234 | dev_err(dev, "request alarm IRQ failed with %d, IRQ %d\n", | |
235 | ret, rtc->alarm_irq); | |
236 | goto err_bad_alarm; | |
237 | } | |
238 | ||
239 | return 0; | |
240 | ||
241 | err_bad_alarm: | |
242 | free_irq(rtc->carry_irq, dev); | |
243 | err_bad_carry: | |
244 | free_irq(rtc->periodic_irq, dev); | |
245 | ||
246 | return ret; | |
247 | } | |
248 | ||
249 | static void sh_rtc_release(struct device *dev) | |
250 | { | |
251 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
252 | ||
253 | sh_rtc_setpie(dev, 0); | |
1b73e6ae | 254 | sh_rtc_setaie(dev, 0); |
317a6104 PM |
255 | |
256 | free_irq(rtc->periodic_irq, dev); | |
257 | free_irq(rtc->carry_irq, dev); | |
258 | free_irq(rtc->alarm_irq, dev); | |
259 | } | |
260 | ||
261 | static int sh_rtc_proc(struct device *dev, struct seq_file *seq) | |
262 | { | |
263 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
264 | unsigned int tmp; | |
265 | ||
266 | tmp = readb(rtc->regbase + RCR1); | |
317a6104 PM |
267 | seq_printf(seq, "carry_IRQ\t: %s\n", |
268 | (tmp & RCR1_CIE) ? "yes" : "no"); | |
269 | ||
270 | tmp = readb(rtc->regbase + RCR2); | |
271 | seq_printf(seq, "periodic_IRQ\t: %s\n", | |
272 | (tmp & RCR2_PEF) ? "yes" : "no"); | |
273 | ||
274 | return 0; | |
275 | } | |
276 | ||
277 | static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
278 | { | |
279 | unsigned int ret = -ENOIOCTLCMD; | |
280 | ||
281 | switch (cmd) { | |
282 | case RTC_PIE_OFF: | |
283 | case RTC_PIE_ON: | |
284 | sh_rtc_setpie(dev, cmd == RTC_PIE_ON); | |
285 | ret = 0; | |
286 | break; | |
287 | case RTC_AIE_OFF: | |
288 | case RTC_AIE_ON: | |
289 | sh_rtc_setaie(dev, cmd == RTC_AIE_ON); | |
290 | ret = 0; | |
291 | break; | |
292 | } | |
293 | ||
294 | return ret; | |
295 | } | |
296 | ||
297 | static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
298 | { | |
299 | struct platform_device *pdev = to_platform_device(dev); | |
300 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
301 | unsigned int sec128, sec2, yr, yr100, cf_bit; | |
302 | ||
303 | do { | |
304 | unsigned int tmp; | |
305 | ||
306 | spin_lock_irq(&rtc->lock); | |
307 | ||
308 | tmp = readb(rtc->regbase + RCR1); | |
309 | tmp &= ~RCR1_CF; /* Clear CF-bit */ | |
310 | tmp |= RCR1_CIE; | |
311 | writeb(tmp, rtc->regbase + RCR1); | |
312 | ||
313 | sec128 = readb(rtc->regbase + R64CNT); | |
314 | ||
315 | tm->tm_sec = BCD2BIN(readb(rtc->regbase + RSECCNT)); | |
316 | tm->tm_min = BCD2BIN(readb(rtc->regbase + RMINCNT)); | |
317 | tm->tm_hour = BCD2BIN(readb(rtc->regbase + RHRCNT)); | |
318 | tm->tm_wday = BCD2BIN(readb(rtc->regbase + RWKCNT)); | |
319 | tm->tm_mday = BCD2BIN(readb(rtc->regbase + RDAYCNT)); | |
a1614796 | 320 | tm->tm_mon = BCD2BIN(readb(rtc->regbase + RMONCNT)) - 1; |
317a6104 PM |
321 | |
322 | #if defined(CONFIG_CPU_SH4) | |
323 | yr = readw(rtc->regbase + RYRCNT); | |
324 | yr100 = BCD2BIN(yr >> 8); | |
325 | yr &= 0xff; | |
326 | #else | |
327 | yr = readb(rtc->regbase + RYRCNT); | |
328 | yr100 = BCD2BIN((yr == 0x99) ? 0x19 : 0x20); | |
329 | #endif | |
330 | ||
331 | tm->tm_year = (yr100 * 100 + BCD2BIN(yr)) - 1900; | |
332 | ||
333 | sec2 = readb(rtc->regbase + R64CNT); | |
334 | cf_bit = readb(rtc->regbase + RCR1) & RCR1_CF; | |
335 | ||
336 | spin_unlock_irq(&rtc->lock); | |
337 | } while (cf_bit != 0 || ((sec128 ^ sec2) & RTC_BIT_INVERTED) != 0); | |
338 | ||
339 | #if RTC_BIT_INVERTED != 0 | |
340 | if ((sec128 & RTC_BIT_INVERTED)) | |
341 | tm->tm_sec--; | |
342 | #endif | |
343 | ||
435c55d1 | 344 | dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, " |
317a6104 PM |
345 | "mday=%d, mon=%d, year=%d, wday=%d\n", |
346 | __FUNCTION__, | |
347 | tm->tm_sec, tm->tm_min, tm->tm_hour, | |
a1614796 | 348 | tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday); |
317a6104 PM |
349 | |
350 | if (rtc_valid_tm(tm) < 0) | |
351 | dev_err(dev, "invalid date\n"); | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
357 | { | |
358 | struct platform_device *pdev = to_platform_device(dev); | |
359 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
360 | unsigned int tmp; | |
361 | int year; | |
362 | ||
363 | spin_lock_irq(&rtc->lock); | |
364 | ||
365 | /* Reset pre-scaler & stop RTC */ | |
366 | tmp = readb(rtc->regbase + RCR2); | |
367 | tmp |= RCR2_RESET; | |
699bc661 | 368 | tmp &= ~RCR2_START; |
317a6104 PM |
369 | writeb(tmp, rtc->regbase + RCR2); |
370 | ||
371 | writeb(BIN2BCD(tm->tm_sec), rtc->regbase + RSECCNT); | |
372 | writeb(BIN2BCD(tm->tm_min), rtc->regbase + RMINCNT); | |
373 | writeb(BIN2BCD(tm->tm_hour), rtc->regbase + RHRCNT); | |
374 | writeb(BIN2BCD(tm->tm_wday), rtc->regbase + RWKCNT); | |
375 | writeb(BIN2BCD(tm->tm_mday), rtc->regbase + RDAYCNT); | |
a1614796 | 376 | writeb(BIN2BCD(tm->tm_mon + 1), rtc->regbase + RMONCNT); |
317a6104 PM |
377 | |
378 | #ifdef CONFIG_CPU_SH3 | |
379 | year = tm->tm_year % 100; | |
380 | writeb(BIN2BCD(year), rtc->regbase + RYRCNT); | |
381 | #else | |
382 | year = (BIN2BCD((tm->tm_year + 1900) / 100) << 8) | | |
383 | BIN2BCD(tm->tm_year % 100); | |
384 | writew(year, rtc->regbase + RYRCNT); | |
385 | #endif | |
386 | ||
387 | /* Start RTC */ | |
388 | tmp = readb(rtc->regbase + RCR2); | |
389 | tmp &= ~RCR2_RESET; | |
390 | tmp |= RCR2_RTCEN | RCR2_START; | |
391 | writeb(tmp, rtc->regbase + RCR2); | |
392 | ||
393 | spin_unlock_irq(&rtc->lock); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
1b73e6ae JL |
398 | static inline int sh_rtc_read_alarm_value(struct sh_rtc *rtc, int reg_off) |
399 | { | |
400 | unsigned int byte; | |
401 | int value = 0xff; /* return 0xff for ignored values */ | |
402 | ||
403 | byte = readb(rtc->regbase + reg_off); | |
404 | if (byte & AR_ENB) { | |
405 | byte &= ~AR_ENB; /* strip the enable bit */ | |
406 | value = BCD2BIN(byte); | |
407 | } | |
408 | ||
409 | return value; | |
410 | } | |
411 | ||
412 | static int sh_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) | |
413 | { | |
414 | struct platform_device *pdev = to_platform_device(dev); | |
415 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
416 | struct rtc_time* tm = &wkalrm->time; | |
417 | ||
418 | spin_lock_irq(&rtc->lock); | |
419 | ||
420 | tm->tm_sec = sh_rtc_read_alarm_value(rtc, RSECAR); | |
421 | tm->tm_min = sh_rtc_read_alarm_value(rtc, RMINAR); | |
422 | tm->tm_hour = sh_rtc_read_alarm_value(rtc, RHRAR); | |
423 | tm->tm_wday = sh_rtc_read_alarm_value(rtc, RWKAR); | |
424 | tm->tm_mday = sh_rtc_read_alarm_value(rtc, RDAYAR); | |
425 | tm->tm_mon = sh_rtc_read_alarm_value(rtc, RMONAR); | |
426 | if (tm->tm_mon > 0) | |
427 | tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */ | |
428 | tm->tm_year = 0xffff; | |
429 | ||
0d103e90 DB |
430 | wkalrm->enabled = (readb(rtc->regbase + RCR1) & RCR1_AIE) ? 1 : 0; |
431 | ||
1b73e6ae JL |
432 | spin_unlock_irq(&rtc->lock); |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
437 | static inline void sh_rtc_write_alarm_value(struct sh_rtc *rtc, | |
438 | int value, int reg_off) | |
439 | { | |
440 | /* < 0 for a value that is ignored */ | |
441 | if (value < 0) | |
442 | writeb(0, rtc->regbase + reg_off); | |
443 | else | |
444 | writeb(BIN2BCD(value) | AR_ENB, rtc->regbase + reg_off); | |
445 | } | |
446 | ||
447 | static int sh_rtc_check_alarm(struct rtc_time* tm) | |
448 | { | |
449 | /* | |
450 | * The original rtc says anything > 0xc0 is "don't care" or "match | |
451 | * all" - most users use 0xff but rtc-dev uses -1 for the same thing. | |
452 | * The original rtc doesn't support years - some things use -1 and | |
453 | * some 0xffff. We use -1 to make out tests easier. | |
454 | */ | |
455 | if (tm->tm_year == 0xffff) | |
456 | tm->tm_year = -1; | |
457 | if (tm->tm_mon >= 0xff) | |
458 | tm->tm_mon = -1; | |
459 | if (tm->tm_mday >= 0xff) | |
460 | tm->tm_mday = -1; | |
461 | if (tm->tm_wday >= 0xff) | |
462 | tm->tm_wday = -1; | |
463 | if (tm->tm_hour >= 0xff) | |
464 | tm->tm_hour = -1; | |
465 | if (tm->tm_min >= 0xff) | |
466 | tm->tm_min = -1; | |
467 | if (tm->tm_sec >= 0xff) | |
468 | tm->tm_sec = -1; | |
469 | ||
470 | if (tm->tm_year > 9999 || | |
471 | tm->tm_mon >= 12 || | |
472 | tm->tm_mday == 0 || tm->tm_mday >= 32 || | |
473 | tm->tm_wday >= 7 || | |
474 | tm->tm_hour >= 24 || | |
475 | tm->tm_min >= 60 || | |
476 | tm->tm_sec >= 60) | |
477 | return -EINVAL; | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | static int sh_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) | |
483 | { | |
484 | struct platform_device *pdev = to_platform_device(dev); | |
485 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
486 | unsigned int rcr1; | |
487 | struct rtc_time *tm = &wkalrm->time; | |
488 | int mon, err; | |
489 | ||
490 | err = sh_rtc_check_alarm(tm); | |
491 | if (unlikely(err < 0)) | |
492 | return err; | |
493 | ||
494 | spin_lock_irq(&rtc->lock); | |
495 | ||
15c945c3 | 496 | /* disable alarm interrupt and clear the alarm flag */ |
1b73e6ae | 497 | rcr1 = readb(rtc->regbase + RCR1); |
15c945c3 JL |
498 | rcr1 &= ~(RCR1_AF|RCR1_AIE); |
499 | writeb(rcr1, rtc->regbase + RCR1); | |
1b73e6ae JL |
500 | |
501 | rtc->rearm_aie = 0; | |
502 | ||
503 | /* set alarm time */ | |
504 | sh_rtc_write_alarm_value(rtc, tm->tm_sec, RSECAR); | |
505 | sh_rtc_write_alarm_value(rtc, tm->tm_min, RMINAR); | |
506 | sh_rtc_write_alarm_value(rtc, tm->tm_hour, RHRAR); | |
507 | sh_rtc_write_alarm_value(rtc, tm->tm_wday, RWKAR); | |
508 | sh_rtc_write_alarm_value(rtc, tm->tm_mday, RDAYAR); | |
509 | mon = tm->tm_mon; | |
510 | if (mon >= 0) | |
511 | mon += 1; | |
512 | sh_rtc_write_alarm_value(rtc, mon, RMONAR); | |
513 | ||
15c945c3 JL |
514 | if (wkalrm->enabled) { |
515 | rcr1 |= RCR1_AIE; | |
516 | writeb(rcr1, rtc->regbase + RCR1); | |
517 | } | |
1b73e6ae JL |
518 | |
519 | spin_unlock_irq(&rtc->lock); | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
317a6104 PM |
524 | static struct rtc_class_ops sh_rtc_ops = { |
525 | .open = sh_rtc_open, | |
526 | .release = sh_rtc_release, | |
527 | .ioctl = sh_rtc_ioctl, | |
528 | .read_time = sh_rtc_read_time, | |
529 | .set_time = sh_rtc_set_time, | |
1b73e6ae JL |
530 | .read_alarm = sh_rtc_read_alarm, |
531 | .set_alarm = sh_rtc_set_alarm, | |
317a6104 PM |
532 | .proc = sh_rtc_proc, |
533 | }; | |
534 | ||
535 | static int __devinit sh_rtc_probe(struct platform_device *pdev) | |
536 | { | |
537 | struct sh_rtc *rtc; | |
538 | struct resource *res; | |
539 | int ret = -ENOENT; | |
540 | ||
541 | rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL); | |
542 | if (unlikely(!rtc)) | |
543 | return -ENOMEM; | |
544 | ||
545 | spin_lock_init(&rtc->lock); | |
546 | ||
547 | rtc->periodic_irq = platform_get_irq(pdev, 0); | |
548 | if (unlikely(rtc->periodic_irq < 0)) { | |
549 | dev_err(&pdev->dev, "No IRQ for period\n"); | |
550 | goto err_badres; | |
551 | } | |
552 | ||
553 | rtc->carry_irq = platform_get_irq(pdev, 1); | |
554 | if (unlikely(rtc->carry_irq < 0)) { | |
555 | dev_err(&pdev->dev, "No IRQ for carry\n"); | |
556 | goto err_badres; | |
557 | } | |
558 | ||
559 | rtc->alarm_irq = platform_get_irq(pdev, 2); | |
560 | if (unlikely(rtc->alarm_irq < 0)) { | |
561 | dev_err(&pdev->dev, "No IRQ for alarm\n"); | |
562 | goto err_badres; | |
563 | } | |
564 | ||
565 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
566 | if (unlikely(res == NULL)) { | |
567 | dev_err(&pdev->dev, "No IO resource\n"); | |
568 | goto err_badres; | |
569 | } | |
570 | ||
571 | rtc->regsize = res->end - res->start + 1; | |
572 | ||
573 | rtc->res = request_mem_region(res->start, rtc->regsize, pdev->name); | |
574 | if (unlikely(!rtc->res)) { | |
575 | ret = -EBUSY; | |
576 | goto err_badres; | |
577 | } | |
578 | ||
579 | rtc->regbase = (void __iomem *)rtc->res->start; | |
580 | if (unlikely(!rtc->regbase)) { | |
581 | ret = -EINVAL; | |
582 | goto err_badmap; | |
583 | } | |
584 | ||
585 | rtc->rtc_dev = rtc_device_register("sh", &pdev->dev, | |
586 | &sh_rtc_ops, THIS_MODULE); | |
587 | if (IS_ERR(rtc)) { | |
588 | ret = PTR_ERR(rtc->rtc_dev); | |
589 | goto err_badmap; | |
590 | } | |
591 | ||
592 | platform_set_drvdata(pdev, rtc); | |
593 | ||
594 | return 0; | |
595 | ||
596 | err_badmap: | |
597 | release_resource(rtc->res); | |
598 | err_badres: | |
599 | kfree(rtc); | |
600 | ||
601 | return ret; | |
602 | } | |
603 | ||
604 | static int __devexit sh_rtc_remove(struct platform_device *pdev) | |
605 | { | |
606 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
607 | ||
608 | if (likely(rtc->rtc_dev)) | |
609 | rtc_device_unregister(rtc->rtc_dev); | |
610 | ||
611 | sh_rtc_setpie(&pdev->dev, 0); | |
612 | sh_rtc_setaie(&pdev->dev, 0); | |
613 | ||
614 | release_resource(rtc->res); | |
615 | ||
616 | platform_set_drvdata(pdev, NULL); | |
617 | ||
618 | kfree(rtc); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | static struct platform_driver sh_rtc_platform_driver = { | |
623 | .driver = { | |
1b73e6ae | 624 | .name = DRV_NAME, |
317a6104 PM |
625 | .owner = THIS_MODULE, |
626 | }, | |
627 | .probe = sh_rtc_probe, | |
628 | .remove = __devexit_p(sh_rtc_remove), | |
629 | }; | |
630 | ||
631 | static int __init sh_rtc_init(void) | |
632 | { | |
633 | return platform_driver_register(&sh_rtc_platform_driver); | |
634 | } | |
635 | ||
636 | static void __exit sh_rtc_exit(void) | |
637 | { | |
638 | platform_driver_unregister(&sh_rtc_platform_driver); | |
639 | } | |
640 | ||
641 | module_init(sh_rtc_init); | |
642 | module_exit(sh_rtc_exit); | |
643 | ||
644 | MODULE_DESCRIPTION("SuperH on-chip RTC driver"); | |
1b73e6ae JL |
645 | MODULE_VERSION(DRV_VERSION); |
646 | MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, Jamie Lenehan <lenehan@twibble.org>"); | |
317a6104 | 647 | MODULE_LICENSE("GPL"); |