Commit | Line | Data |
---|---|---|
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 | ||
107 | rtc_update_irq(&rtc->rtc_dev->class_dev, 1, events); | |
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 | ||
142 | rtc_update_irq(&rtc->rtc_dev->class_dev, 1, events); | |
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 | ||
156 | rtc_update_irq(&rtc->rtc_dev->class_dev, 1, RTC_PF | RTC_IRQF); | |
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); | |
267 | seq_printf(seq, "alarm_IRQ\t: %s\n", | |
268 | (tmp & RCR1_AIE) ? "yes" : "no"); | |
269 | seq_printf(seq, "carry_IRQ\t: %s\n", | |
270 | (tmp & RCR1_CIE) ? "yes" : "no"); | |
271 | ||
272 | tmp = readb(rtc->regbase + RCR2); | |
273 | seq_printf(seq, "periodic_IRQ\t: %s\n", | |
274 | (tmp & RCR2_PEF) ? "yes" : "no"); | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
280 | { | |
281 | unsigned int ret = -ENOIOCTLCMD; | |
282 | ||
283 | switch (cmd) { | |
284 | case RTC_PIE_OFF: | |
285 | case RTC_PIE_ON: | |
286 | sh_rtc_setpie(dev, cmd == RTC_PIE_ON); | |
287 | ret = 0; | |
288 | break; | |
289 | case RTC_AIE_OFF: | |
290 | case RTC_AIE_ON: | |
291 | sh_rtc_setaie(dev, cmd == RTC_AIE_ON); | |
292 | ret = 0; | |
293 | break; | |
294 | } | |
295 | ||
296 | return ret; | |
297 | } | |
298 | ||
299 | static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
300 | { | |
301 | struct platform_device *pdev = to_platform_device(dev); | |
302 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
303 | unsigned int sec128, sec2, yr, yr100, cf_bit; | |
304 | ||
305 | do { | |
306 | unsigned int tmp; | |
307 | ||
308 | spin_lock_irq(&rtc->lock); | |
309 | ||
310 | tmp = readb(rtc->regbase + RCR1); | |
311 | tmp &= ~RCR1_CF; /* Clear CF-bit */ | |
312 | tmp |= RCR1_CIE; | |
313 | writeb(tmp, rtc->regbase + RCR1); | |
314 | ||
315 | sec128 = readb(rtc->regbase + R64CNT); | |
316 | ||
317 | tm->tm_sec = BCD2BIN(readb(rtc->regbase + RSECCNT)); | |
318 | tm->tm_min = BCD2BIN(readb(rtc->regbase + RMINCNT)); | |
319 | tm->tm_hour = BCD2BIN(readb(rtc->regbase + RHRCNT)); | |
320 | tm->tm_wday = BCD2BIN(readb(rtc->regbase + RWKCNT)); | |
321 | tm->tm_mday = BCD2BIN(readb(rtc->regbase + RDAYCNT)); | |
a1614796 | 322 | tm->tm_mon = BCD2BIN(readb(rtc->regbase + RMONCNT)) - 1; |
317a6104 PM |
323 | |
324 | #if defined(CONFIG_CPU_SH4) | |
325 | yr = readw(rtc->regbase + RYRCNT); | |
326 | yr100 = BCD2BIN(yr >> 8); | |
327 | yr &= 0xff; | |
328 | #else | |
329 | yr = readb(rtc->regbase + RYRCNT); | |
330 | yr100 = BCD2BIN((yr == 0x99) ? 0x19 : 0x20); | |
331 | #endif | |
332 | ||
333 | tm->tm_year = (yr100 * 100 + BCD2BIN(yr)) - 1900; | |
334 | ||
335 | sec2 = readb(rtc->regbase + R64CNT); | |
336 | cf_bit = readb(rtc->regbase + RCR1) & RCR1_CF; | |
337 | ||
338 | spin_unlock_irq(&rtc->lock); | |
339 | } while (cf_bit != 0 || ((sec128 ^ sec2) & RTC_BIT_INVERTED) != 0); | |
340 | ||
341 | #if RTC_BIT_INVERTED != 0 | |
342 | if ((sec128 & RTC_BIT_INVERTED)) | |
343 | tm->tm_sec--; | |
344 | #endif | |
345 | ||
346 | dev_dbg(&dev, "%s: tm is secs=%d, mins=%d, hours=%d, " | |
347 | "mday=%d, mon=%d, year=%d, wday=%d\n", | |
348 | __FUNCTION__, | |
349 | tm->tm_sec, tm->tm_min, tm->tm_hour, | |
a1614796 | 350 | tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday); |
317a6104 PM |
351 | |
352 | if (rtc_valid_tm(tm) < 0) | |
353 | dev_err(dev, "invalid date\n"); | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
359 | { | |
360 | struct platform_device *pdev = to_platform_device(dev); | |
361 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
362 | unsigned int tmp; | |
363 | int year; | |
364 | ||
365 | spin_lock_irq(&rtc->lock); | |
366 | ||
367 | /* Reset pre-scaler & stop RTC */ | |
368 | tmp = readb(rtc->regbase + RCR2); | |
369 | tmp |= RCR2_RESET; | |
370 | writeb(tmp, rtc->regbase + RCR2); | |
371 | ||
372 | writeb(BIN2BCD(tm->tm_sec), rtc->regbase + RSECCNT); | |
373 | writeb(BIN2BCD(tm->tm_min), rtc->regbase + RMINCNT); | |
374 | writeb(BIN2BCD(tm->tm_hour), rtc->regbase + RHRCNT); | |
375 | writeb(BIN2BCD(tm->tm_wday), rtc->regbase + RWKCNT); | |
376 | writeb(BIN2BCD(tm->tm_mday), rtc->regbase + RDAYCNT); | |
a1614796 | 377 | writeb(BIN2BCD(tm->tm_mon + 1), rtc->regbase + RMONCNT); |
317a6104 PM |
378 | |
379 | #ifdef CONFIG_CPU_SH3 | |
380 | year = tm->tm_year % 100; | |
381 | writeb(BIN2BCD(year), rtc->regbase + RYRCNT); | |
382 | #else | |
383 | year = (BIN2BCD((tm->tm_year + 1900) / 100) << 8) | | |
384 | BIN2BCD(tm->tm_year % 100); | |
385 | writew(year, rtc->regbase + RYRCNT); | |
386 | #endif | |
387 | ||
388 | /* Start RTC */ | |
389 | tmp = readb(rtc->regbase + RCR2); | |
390 | tmp &= ~RCR2_RESET; | |
391 | tmp |= RCR2_RTCEN | RCR2_START; | |
392 | writeb(tmp, rtc->regbase + RCR2); | |
393 | ||
394 | spin_unlock_irq(&rtc->lock); | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
1b73e6ae JL |
399 | static inline int sh_rtc_read_alarm_value(struct sh_rtc *rtc, int reg_off) |
400 | { | |
401 | unsigned int byte; | |
402 | int value = 0xff; /* return 0xff for ignored values */ | |
403 | ||
404 | byte = readb(rtc->regbase + reg_off); | |
405 | if (byte & AR_ENB) { | |
406 | byte &= ~AR_ENB; /* strip the enable bit */ | |
407 | value = BCD2BIN(byte); | |
408 | } | |
409 | ||
410 | return value; | |
411 | } | |
412 | ||
413 | static int sh_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) | |
414 | { | |
415 | struct platform_device *pdev = to_platform_device(dev); | |
416 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
417 | struct rtc_time* tm = &wkalrm->time; | |
418 | ||
419 | spin_lock_irq(&rtc->lock); | |
420 | ||
421 | tm->tm_sec = sh_rtc_read_alarm_value(rtc, RSECAR); | |
422 | tm->tm_min = sh_rtc_read_alarm_value(rtc, RMINAR); | |
423 | tm->tm_hour = sh_rtc_read_alarm_value(rtc, RHRAR); | |
424 | tm->tm_wday = sh_rtc_read_alarm_value(rtc, RWKAR); | |
425 | tm->tm_mday = sh_rtc_read_alarm_value(rtc, RDAYAR); | |
426 | tm->tm_mon = sh_rtc_read_alarm_value(rtc, RMONAR); | |
427 | if (tm->tm_mon > 0) | |
428 | tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */ | |
429 | tm->tm_year = 0xffff; | |
430 | ||
431 | spin_unlock_irq(&rtc->lock); | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | static inline void sh_rtc_write_alarm_value(struct sh_rtc *rtc, | |
437 | int value, int reg_off) | |
438 | { | |
439 | /* < 0 for a value that is ignored */ | |
440 | if (value < 0) | |
441 | writeb(0, rtc->regbase + reg_off); | |
442 | else | |
443 | writeb(BIN2BCD(value) | AR_ENB, rtc->regbase + reg_off); | |
444 | } | |
445 | ||
446 | static int sh_rtc_check_alarm(struct rtc_time* tm) | |
447 | { | |
448 | /* | |
449 | * The original rtc says anything > 0xc0 is "don't care" or "match | |
450 | * all" - most users use 0xff but rtc-dev uses -1 for the same thing. | |
451 | * The original rtc doesn't support years - some things use -1 and | |
452 | * some 0xffff. We use -1 to make out tests easier. | |
453 | */ | |
454 | if (tm->tm_year == 0xffff) | |
455 | tm->tm_year = -1; | |
456 | if (tm->tm_mon >= 0xff) | |
457 | tm->tm_mon = -1; | |
458 | if (tm->tm_mday >= 0xff) | |
459 | tm->tm_mday = -1; | |
460 | if (tm->tm_wday >= 0xff) | |
461 | tm->tm_wday = -1; | |
462 | if (tm->tm_hour >= 0xff) | |
463 | tm->tm_hour = -1; | |
464 | if (tm->tm_min >= 0xff) | |
465 | tm->tm_min = -1; | |
466 | if (tm->tm_sec >= 0xff) | |
467 | tm->tm_sec = -1; | |
468 | ||
469 | if (tm->tm_year > 9999 || | |
470 | tm->tm_mon >= 12 || | |
471 | tm->tm_mday == 0 || tm->tm_mday >= 32 || | |
472 | tm->tm_wday >= 7 || | |
473 | tm->tm_hour >= 24 || | |
474 | tm->tm_min >= 60 || | |
475 | tm->tm_sec >= 60) | |
476 | return -EINVAL; | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static int sh_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) | |
482 | { | |
483 | struct platform_device *pdev = to_platform_device(dev); | |
484 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
485 | unsigned int rcr1; | |
486 | struct rtc_time *tm = &wkalrm->time; | |
487 | int mon, err; | |
488 | ||
489 | err = sh_rtc_check_alarm(tm); | |
490 | if (unlikely(err < 0)) | |
491 | return err; | |
492 | ||
493 | spin_lock_irq(&rtc->lock); | |
494 | ||
495 | /* disable alarm interrupt and clear flag */ | |
496 | rcr1 = readb(rtc->regbase + RCR1); | |
497 | rcr1 &= ~RCR1_AF; | |
498 | writeb(rcr1 & ~RCR1_AIE, rtc->regbase + RCR1); | |
499 | ||
500 | rtc->rearm_aie = 0; | |
501 | ||
502 | /* set alarm time */ | |
503 | sh_rtc_write_alarm_value(rtc, tm->tm_sec, RSECAR); | |
504 | sh_rtc_write_alarm_value(rtc, tm->tm_min, RMINAR); | |
505 | sh_rtc_write_alarm_value(rtc, tm->tm_hour, RHRAR); | |
506 | sh_rtc_write_alarm_value(rtc, tm->tm_wday, RWKAR); | |
507 | sh_rtc_write_alarm_value(rtc, tm->tm_mday, RDAYAR); | |
508 | mon = tm->tm_mon; | |
509 | if (mon >= 0) | |
510 | mon += 1; | |
511 | sh_rtc_write_alarm_value(rtc, mon, RMONAR); | |
512 | ||
513 | /* Restore interrupt activation status */ | |
514 | writeb(rcr1, rtc->regbase + RCR1); | |
515 | ||
516 | spin_unlock_irq(&rtc->lock); | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
317a6104 PM |
521 | static struct rtc_class_ops sh_rtc_ops = { |
522 | .open = sh_rtc_open, | |
523 | .release = sh_rtc_release, | |
524 | .ioctl = sh_rtc_ioctl, | |
525 | .read_time = sh_rtc_read_time, | |
526 | .set_time = sh_rtc_set_time, | |
1b73e6ae JL |
527 | .read_alarm = sh_rtc_read_alarm, |
528 | .set_alarm = sh_rtc_set_alarm, | |
317a6104 PM |
529 | .proc = sh_rtc_proc, |
530 | }; | |
531 | ||
532 | static int __devinit sh_rtc_probe(struct platform_device *pdev) | |
533 | { | |
534 | struct sh_rtc *rtc; | |
535 | struct resource *res; | |
536 | int ret = -ENOENT; | |
537 | ||
538 | rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL); | |
539 | if (unlikely(!rtc)) | |
540 | return -ENOMEM; | |
541 | ||
542 | spin_lock_init(&rtc->lock); | |
543 | ||
544 | rtc->periodic_irq = platform_get_irq(pdev, 0); | |
545 | if (unlikely(rtc->periodic_irq < 0)) { | |
546 | dev_err(&pdev->dev, "No IRQ for period\n"); | |
547 | goto err_badres; | |
548 | } | |
549 | ||
550 | rtc->carry_irq = platform_get_irq(pdev, 1); | |
551 | if (unlikely(rtc->carry_irq < 0)) { | |
552 | dev_err(&pdev->dev, "No IRQ for carry\n"); | |
553 | goto err_badres; | |
554 | } | |
555 | ||
556 | rtc->alarm_irq = platform_get_irq(pdev, 2); | |
557 | if (unlikely(rtc->alarm_irq < 0)) { | |
558 | dev_err(&pdev->dev, "No IRQ for alarm\n"); | |
559 | goto err_badres; | |
560 | } | |
561 | ||
562 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
563 | if (unlikely(res == NULL)) { | |
564 | dev_err(&pdev->dev, "No IO resource\n"); | |
565 | goto err_badres; | |
566 | } | |
567 | ||
568 | rtc->regsize = res->end - res->start + 1; | |
569 | ||
570 | rtc->res = request_mem_region(res->start, rtc->regsize, pdev->name); | |
571 | if (unlikely(!rtc->res)) { | |
572 | ret = -EBUSY; | |
573 | goto err_badres; | |
574 | } | |
575 | ||
576 | rtc->regbase = (void __iomem *)rtc->res->start; | |
577 | if (unlikely(!rtc->regbase)) { | |
578 | ret = -EINVAL; | |
579 | goto err_badmap; | |
580 | } | |
581 | ||
582 | rtc->rtc_dev = rtc_device_register("sh", &pdev->dev, | |
583 | &sh_rtc_ops, THIS_MODULE); | |
584 | if (IS_ERR(rtc)) { | |
585 | ret = PTR_ERR(rtc->rtc_dev); | |
586 | goto err_badmap; | |
587 | } | |
588 | ||
589 | platform_set_drvdata(pdev, rtc); | |
590 | ||
591 | return 0; | |
592 | ||
593 | err_badmap: | |
594 | release_resource(rtc->res); | |
595 | err_badres: | |
596 | kfree(rtc); | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
601 | static int __devexit sh_rtc_remove(struct platform_device *pdev) | |
602 | { | |
603 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
604 | ||
605 | if (likely(rtc->rtc_dev)) | |
606 | rtc_device_unregister(rtc->rtc_dev); | |
607 | ||
608 | sh_rtc_setpie(&pdev->dev, 0); | |
609 | sh_rtc_setaie(&pdev->dev, 0); | |
610 | ||
611 | release_resource(rtc->res); | |
612 | ||
613 | platform_set_drvdata(pdev, NULL); | |
614 | ||
615 | kfree(rtc); | |
616 | ||
617 | return 0; | |
618 | } | |
619 | static struct platform_driver sh_rtc_platform_driver = { | |
620 | .driver = { | |
1b73e6ae | 621 | .name = DRV_NAME, |
317a6104 PM |
622 | .owner = THIS_MODULE, |
623 | }, | |
624 | .probe = sh_rtc_probe, | |
625 | .remove = __devexit_p(sh_rtc_remove), | |
626 | }; | |
627 | ||
628 | static int __init sh_rtc_init(void) | |
629 | { | |
630 | return platform_driver_register(&sh_rtc_platform_driver); | |
631 | } | |
632 | ||
633 | static void __exit sh_rtc_exit(void) | |
634 | { | |
635 | platform_driver_unregister(&sh_rtc_platform_driver); | |
636 | } | |
637 | ||
638 | module_init(sh_rtc_init); | |
639 | module_exit(sh_rtc_exit); | |
640 | ||
641 | MODULE_DESCRIPTION("SuperH on-chip RTC driver"); | |
1b73e6ae JL |
642 | MODULE_VERSION(DRV_VERSION); |
643 | MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, Jamie Lenehan <lenehan@twibble.org>"); | |
317a6104 | 644 | MODULE_LICENSE("GPL"); |