Commit | Line | Data |
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317a6104 PM |
1 | /* |
2 | * SuperH On-Chip RTC Support | |
3 | * | |
ad89f87a | 4 | * Copyright (C) 2006, 2007 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> |
ad89f87a | 26 | #include <asm/rtc.h> |
317a6104 | 27 | |
1b73e6ae | 28 | #define DRV_NAME "sh-rtc" |
ad89f87a | 29 | #define DRV_VERSION "0.1.3" |
1b73e6ae | 30 | |
317a6104 PM |
31 | #ifdef CONFIG_CPU_SH3 |
32 | #define rtc_reg_size sizeof(u16) | |
33 | #define RTC_BIT_INVERTED 0 /* No bug on SH7708, SH7709A */ | |
ad89f87a | 34 | #define RTC_DEF_CAPABILITIES 0UL |
317a6104 PM |
35 | #elif defined(CONFIG_CPU_SH4) |
36 | #define rtc_reg_size sizeof(u32) | |
37 | #define RTC_BIT_INVERTED 0x40 /* bug on SH7750, SH7750S */ | |
ad89f87a | 38 | #define RTC_DEF_CAPABILITIES RTC_CAP_4_DIGIT_YEAR |
317a6104 PM |
39 | #endif |
40 | ||
41 | #define RTC_REG(r) ((r) * rtc_reg_size) | |
42 | ||
31ccb081 | 43 | #define R64CNT RTC_REG(0) |
1b73e6ae JL |
44 | |
45 | #define RSECCNT RTC_REG(1) /* RTC sec */ | |
46 | #define RMINCNT RTC_REG(2) /* RTC min */ | |
47 | #define RHRCNT RTC_REG(3) /* RTC hour */ | |
48 | #define RWKCNT RTC_REG(4) /* RTC week */ | |
49 | #define RDAYCNT RTC_REG(5) /* RTC day */ | |
50 | #define RMONCNT RTC_REG(6) /* RTC month */ | |
51 | #define RYRCNT RTC_REG(7) /* RTC year */ | |
52 | #define RSECAR RTC_REG(8) /* ALARM sec */ | |
53 | #define RMINAR RTC_REG(9) /* ALARM min */ | |
54 | #define RHRAR RTC_REG(10) /* ALARM hour */ | |
55 | #define RWKAR RTC_REG(11) /* ALARM week */ | |
56 | #define RDAYAR RTC_REG(12) /* ALARM day */ | |
57 | #define RMONAR RTC_REG(13) /* ALARM month */ | |
58 | #define RCR1 RTC_REG(14) /* Control */ | |
59 | #define RCR2 RTC_REG(15) /* Control */ | |
60 | ||
61 | /* ALARM Bits - or with BCD encoded value */ | |
62 | #define AR_ENB 0x80 /* Enable for alarm cmp */ | |
317a6104 PM |
63 | |
64 | /* RCR1 Bits */ | |
65 | #define RCR1_CF 0x80 /* Carry Flag */ | |
66 | #define RCR1_CIE 0x10 /* Carry Interrupt Enable */ | |
67 | #define RCR1_AIE 0x08 /* Alarm Interrupt Enable */ | |
68 | #define RCR1_AF 0x01 /* Alarm Flag */ | |
69 | ||
70 | /* RCR2 Bits */ | |
71 | #define RCR2_PEF 0x80 /* PEriodic interrupt Flag */ | |
72 | #define RCR2_PESMASK 0x70 /* Periodic interrupt Set */ | |
73 | #define RCR2_RTCEN 0x08 /* ENable RTC */ | |
74 | #define RCR2_ADJ 0x04 /* ADJustment (30-second) */ | |
75 | #define RCR2_RESET 0x02 /* Reset bit */ | |
76 | #define RCR2_START 0x01 /* Start bit */ | |
77 | ||
78 | struct sh_rtc { | |
79 | void __iomem *regbase; | |
80 | unsigned long regsize; | |
81 | struct resource *res; | |
82 | unsigned int alarm_irq, periodic_irq, carry_irq; | |
83 | struct rtc_device *rtc_dev; | |
84 | spinlock_t lock; | |
1b73e6ae | 85 | int rearm_aie; |
ad89f87a | 86 | unsigned long capabilities; /* See asm-sh/rtc.h for cap bits */ |
317a6104 PM |
87 | }; |
88 | ||
31ccb081 | 89 | static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id) |
317a6104 | 90 | { |
31ccb081 | 91 | struct platform_device *pdev = to_platform_device(dev_id); |
317a6104 PM |
92 | struct sh_rtc *rtc = platform_get_drvdata(pdev); |
93 | unsigned int tmp, events = 0; | |
94 | ||
95 | spin_lock(&rtc->lock); | |
96 | ||
97 | tmp = readb(rtc->regbase + RCR1); | |
1b73e6ae | 98 | tmp &= ~RCR1_CF; |
317a6104 | 99 | |
1b73e6ae JL |
100 | if (rtc->rearm_aie) { |
101 | if (tmp & RCR1_AF) | |
102 | tmp &= ~RCR1_AF; /* try to clear AF again */ | |
103 | else { | |
104 | tmp |= RCR1_AIE; /* AF has cleared, rearm IRQ */ | |
105 | rtc->rearm_aie = 0; | |
106 | } | |
107 | } | |
317a6104 PM |
108 | |
109 | writeb(tmp, rtc->regbase + RCR1); | |
110 | ||
a361a68b | 111 | rtc_update_irq(rtc->rtc_dev, 1, events); |
317a6104 PM |
112 | |
113 | spin_unlock(&rtc->lock); | |
114 | ||
115 | return IRQ_HANDLED; | |
116 | } | |
117 | ||
1b73e6ae JL |
118 | static irqreturn_t sh_rtc_alarm(int irq, void *dev_id) |
119 | { | |
120 | struct platform_device *pdev = to_platform_device(dev_id); | |
121 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
122 | unsigned int tmp, events = 0; | |
123 | ||
124 | spin_lock(&rtc->lock); | |
125 | ||
126 | tmp = readb(rtc->regbase + RCR1); | |
127 | ||
128 | /* | |
129 | * If AF is set then the alarm has triggered. If we clear AF while | |
130 | * the alarm time still matches the RTC time then AF will | |
131 | * immediately be set again, and if AIE is enabled then the alarm | |
132 | * interrupt will immediately be retrigger. So we clear AIE here | |
133 | * and use rtc->rearm_aie so that the carry interrupt will keep | |
134 | * trying to clear AF and once it stays cleared it'll re-enable | |
135 | * AIE. | |
136 | */ | |
137 | if (tmp & RCR1_AF) { | |
138 | events |= RTC_AF | RTC_IRQF; | |
139 | ||
140 | tmp &= ~(RCR1_AF|RCR1_AIE); | |
141 | ||
142 | writeb(tmp, rtc->regbase + RCR1); | |
143 | ||
144 | rtc->rearm_aie = 1; | |
145 | ||
a361a68b | 146 | rtc_update_irq(rtc->rtc_dev, 1, events); |
1b73e6ae JL |
147 | } |
148 | ||
149 | spin_unlock(&rtc->lock); | |
150 | return IRQ_HANDLED; | |
151 | } | |
152 | ||
31ccb081 | 153 | static irqreturn_t sh_rtc_periodic(int irq, void *dev_id) |
317a6104 | 154 | { |
31ccb081 JL |
155 | struct platform_device *pdev = to_platform_device(dev_id); |
156 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
317a6104 PM |
157 | |
158 | spin_lock(&rtc->lock); | |
159 | ||
a361a68b | 160 | rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF); |
317a6104 PM |
161 | |
162 | spin_unlock(&rtc->lock); | |
163 | ||
164 | return IRQ_HANDLED; | |
165 | } | |
166 | ||
167 | static inline void sh_rtc_setpie(struct device *dev, unsigned int enable) | |
168 | { | |
169 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
170 | unsigned int tmp; | |
171 | ||
172 | spin_lock_irq(&rtc->lock); | |
173 | ||
174 | tmp = readb(rtc->regbase + RCR2); | |
175 | ||
176 | if (enable) { | |
177 | tmp &= ~RCR2_PESMASK; | |
178 | tmp |= RCR2_PEF | (2 << 4); | |
179 | } else | |
180 | tmp &= ~(RCR2_PESMASK | RCR2_PEF); | |
181 | ||
182 | writeb(tmp, rtc->regbase + RCR2); | |
183 | ||
184 | spin_unlock_irq(&rtc->lock); | |
185 | } | |
186 | ||
187 | static inline void sh_rtc_setaie(struct device *dev, unsigned int enable) | |
188 | { | |
189 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
190 | unsigned int tmp; | |
191 | ||
192 | spin_lock_irq(&rtc->lock); | |
193 | ||
194 | tmp = readb(rtc->regbase + RCR1); | |
195 | ||
1b73e6ae | 196 | if (!enable) { |
317a6104 | 197 | tmp &= ~RCR1_AIE; |
1b73e6ae JL |
198 | rtc->rearm_aie = 0; |
199 | } else if (rtc->rearm_aie == 0) | |
200 | tmp |= RCR1_AIE; | |
317a6104 PM |
201 | |
202 | writeb(tmp, rtc->regbase + RCR1); | |
203 | ||
204 | spin_unlock_irq(&rtc->lock); | |
205 | } | |
206 | ||
207 | static int sh_rtc_open(struct device *dev) | |
208 | { | |
209 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
210 | unsigned int tmp; | |
211 | int ret; | |
212 | ||
213 | tmp = readb(rtc->regbase + RCR1); | |
214 | tmp &= ~RCR1_CF; | |
215 | tmp |= RCR1_CIE; | |
216 | writeb(tmp, rtc->regbase + RCR1); | |
217 | ||
35f3c518 | 218 | ret = request_irq(rtc->periodic_irq, sh_rtc_periodic, IRQF_DISABLED, |
317a6104 PM |
219 | "sh-rtc period", dev); |
220 | if (unlikely(ret)) { | |
221 | dev_err(dev, "request period IRQ failed with %d, IRQ %d\n", | |
222 | ret, rtc->periodic_irq); | |
223 | return ret; | |
224 | } | |
225 | ||
35f3c518 | 226 | ret = request_irq(rtc->carry_irq, sh_rtc_interrupt, IRQF_DISABLED, |
317a6104 PM |
227 | "sh-rtc carry", dev); |
228 | if (unlikely(ret)) { | |
229 | dev_err(dev, "request carry IRQ failed with %d, IRQ %d\n", | |
230 | ret, rtc->carry_irq); | |
231 | free_irq(rtc->periodic_irq, dev); | |
232 | goto err_bad_carry; | |
233 | } | |
234 | ||
1b73e6ae | 235 | ret = request_irq(rtc->alarm_irq, sh_rtc_alarm, IRQF_DISABLED, |
317a6104 PM |
236 | "sh-rtc alarm", dev); |
237 | if (unlikely(ret)) { | |
238 | dev_err(dev, "request alarm IRQ failed with %d, IRQ %d\n", | |
239 | ret, rtc->alarm_irq); | |
240 | goto err_bad_alarm; | |
241 | } | |
242 | ||
243 | return 0; | |
244 | ||
245 | err_bad_alarm: | |
246 | free_irq(rtc->carry_irq, dev); | |
247 | err_bad_carry: | |
248 | free_irq(rtc->periodic_irq, dev); | |
249 | ||
250 | return ret; | |
251 | } | |
252 | ||
253 | static void sh_rtc_release(struct device *dev) | |
254 | { | |
255 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
256 | ||
257 | sh_rtc_setpie(dev, 0); | |
1b73e6ae | 258 | sh_rtc_setaie(dev, 0); |
317a6104 PM |
259 | |
260 | free_irq(rtc->periodic_irq, dev); | |
261 | free_irq(rtc->carry_irq, dev); | |
262 | free_irq(rtc->alarm_irq, dev); | |
263 | } | |
264 | ||
265 | static int sh_rtc_proc(struct device *dev, struct seq_file *seq) | |
266 | { | |
267 | struct sh_rtc *rtc = dev_get_drvdata(dev); | |
268 | unsigned int tmp; | |
269 | ||
270 | tmp = readb(rtc->regbase + RCR1); | |
317a6104 PM |
271 | seq_printf(seq, "carry_IRQ\t: %s\n", |
272 | (tmp & RCR1_CIE) ? "yes" : "no"); | |
273 | ||
274 | tmp = readb(rtc->regbase + RCR2); | |
275 | seq_printf(seq, "periodic_IRQ\t: %s\n", | |
276 | (tmp & RCR2_PEF) ? "yes" : "no"); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) | |
282 | { | |
283 | unsigned int ret = -ENOIOCTLCMD; | |
284 | ||
285 | switch (cmd) { | |
286 | case RTC_PIE_OFF: | |
287 | case RTC_PIE_ON: | |
288 | sh_rtc_setpie(dev, cmd == RTC_PIE_ON); | |
289 | ret = 0; | |
290 | break; | |
291 | case RTC_AIE_OFF: | |
292 | case RTC_AIE_ON: | |
293 | sh_rtc_setaie(dev, cmd == RTC_AIE_ON); | |
294 | ret = 0; | |
295 | break; | |
296 | } | |
297 | ||
298 | return ret; | |
299 | } | |
300 | ||
301 | static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
302 | { | |
303 | struct platform_device *pdev = to_platform_device(dev); | |
304 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
305 | unsigned int sec128, sec2, yr, yr100, cf_bit; | |
306 | ||
307 | do { | |
308 | unsigned int tmp; | |
309 | ||
310 | spin_lock_irq(&rtc->lock); | |
311 | ||
312 | tmp = readb(rtc->regbase + RCR1); | |
313 | tmp &= ~RCR1_CF; /* Clear CF-bit */ | |
314 | tmp |= RCR1_CIE; | |
315 | writeb(tmp, rtc->regbase + RCR1); | |
316 | ||
317 | sec128 = readb(rtc->regbase + R64CNT); | |
318 | ||
319 | tm->tm_sec = BCD2BIN(readb(rtc->regbase + RSECCNT)); | |
320 | tm->tm_min = BCD2BIN(readb(rtc->regbase + RMINCNT)); | |
321 | tm->tm_hour = BCD2BIN(readb(rtc->regbase + RHRCNT)); | |
322 | tm->tm_wday = BCD2BIN(readb(rtc->regbase + RWKCNT)); | |
323 | tm->tm_mday = BCD2BIN(readb(rtc->regbase + RDAYCNT)); | |
a1614796 | 324 | tm->tm_mon = BCD2BIN(readb(rtc->regbase + RMONCNT)) - 1; |
317a6104 | 325 | |
ad89f87a PM |
326 | if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) { |
327 | yr = readw(rtc->regbase + RYRCNT); | |
328 | yr100 = BCD2BIN(yr >> 8); | |
329 | yr &= 0xff; | |
330 | } else { | |
331 | yr = readb(rtc->regbase + RYRCNT); | |
332 | yr100 = BCD2BIN((yr == 0x99) ? 0x19 : 0x20); | |
333 | } | |
317a6104 PM |
334 | |
335 | tm->tm_year = (yr100 * 100 + BCD2BIN(yr)) - 1900; | |
336 | ||
337 | sec2 = readb(rtc->regbase + R64CNT); | |
338 | cf_bit = readb(rtc->regbase + RCR1) & RCR1_CF; | |
339 | ||
340 | spin_unlock_irq(&rtc->lock); | |
341 | } while (cf_bit != 0 || ((sec128 ^ sec2) & RTC_BIT_INVERTED) != 0); | |
342 | ||
343 | #if RTC_BIT_INVERTED != 0 | |
344 | if ((sec128 & RTC_BIT_INVERTED)) | |
345 | tm->tm_sec--; | |
346 | #endif | |
347 | ||
435c55d1 | 348 | dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, " |
317a6104 PM |
349 | "mday=%d, mon=%d, year=%d, wday=%d\n", |
350 | __FUNCTION__, | |
351 | tm->tm_sec, tm->tm_min, tm->tm_hour, | |
a1614796 | 352 | tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday); |
317a6104 PM |
353 | |
354 | if (rtc_valid_tm(tm) < 0) | |
355 | dev_err(dev, "invalid date\n"); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
361 | { | |
362 | struct platform_device *pdev = to_platform_device(dev); | |
363 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
364 | unsigned int tmp; | |
365 | int year; | |
366 | ||
367 | spin_lock_irq(&rtc->lock); | |
368 | ||
369 | /* Reset pre-scaler & stop RTC */ | |
370 | tmp = readb(rtc->regbase + RCR2); | |
371 | tmp |= RCR2_RESET; | |
699bc661 | 372 | tmp &= ~RCR2_START; |
317a6104 PM |
373 | writeb(tmp, rtc->regbase + RCR2); |
374 | ||
375 | writeb(BIN2BCD(tm->tm_sec), rtc->regbase + RSECCNT); | |
376 | writeb(BIN2BCD(tm->tm_min), rtc->regbase + RMINCNT); | |
377 | writeb(BIN2BCD(tm->tm_hour), rtc->regbase + RHRCNT); | |
378 | writeb(BIN2BCD(tm->tm_wday), rtc->regbase + RWKCNT); | |
379 | writeb(BIN2BCD(tm->tm_mday), rtc->regbase + RDAYCNT); | |
a1614796 | 380 | writeb(BIN2BCD(tm->tm_mon + 1), rtc->regbase + RMONCNT); |
317a6104 | 381 | |
ad89f87a PM |
382 | if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) { |
383 | year = (BIN2BCD((tm->tm_year + 1900) / 100) << 8) | | |
384 | BIN2BCD(tm->tm_year % 100); | |
385 | writew(year, rtc->regbase + RYRCNT); | |
386 | } else { | |
387 | year = tm->tm_year % 100; | |
388 | writeb(BIN2BCD(year), rtc->regbase + RYRCNT); | |
389 | } | |
317a6104 PM |
390 | |
391 | /* Start RTC */ | |
392 | tmp = readb(rtc->regbase + RCR2); | |
393 | tmp &= ~RCR2_RESET; | |
394 | tmp |= RCR2_RTCEN | RCR2_START; | |
395 | writeb(tmp, rtc->regbase + RCR2); | |
396 | ||
397 | spin_unlock_irq(&rtc->lock); | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
1b73e6ae JL |
402 | static inline int sh_rtc_read_alarm_value(struct sh_rtc *rtc, int reg_off) |
403 | { | |
404 | unsigned int byte; | |
405 | int value = 0xff; /* return 0xff for ignored values */ | |
406 | ||
407 | byte = readb(rtc->regbase + reg_off); | |
408 | if (byte & AR_ENB) { | |
409 | byte &= ~AR_ENB; /* strip the enable bit */ | |
410 | value = BCD2BIN(byte); | |
411 | } | |
412 | ||
413 | return value; | |
414 | } | |
415 | ||
416 | static int sh_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) | |
417 | { | |
418 | struct platform_device *pdev = to_platform_device(dev); | |
419 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
420 | struct rtc_time* tm = &wkalrm->time; | |
421 | ||
422 | spin_lock_irq(&rtc->lock); | |
423 | ||
424 | tm->tm_sec = sh_rtc_read_alarm_value(rtc, RSECAR); | |
425 | tm->tm_min = sh_rtc_read_alarm_value(rtc, RMINAR); | |
426 | tm->tm_hour = sh_rtc_read_alarm_value(rtc, RHRAR); | |
427 | tm->tm_wday = sh_rtc_read_alarm_value(rtc, RWKAR); | |
428 | tm->tm_mday = sh_rtc_read_alarm_value(rtc, RDAYAR); | |
429 | tm->tm_mon = sh_rtc_read_alarm_value(rtc, RMONAR); | |
430 | if (tm->tm_mon > 0) | |
431 | tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */ | |
432 | tm->tm_year = 0xffff; | |
433 | ||
0d103e90 DB |
434 | wkalrm->enabled = (readb(rtc->regbase + RCR1) & RCR1_AIE) ? 1 : 0; |
435 | ||
1b73e6ae JL |
436 | spin_unlock_irq(&rtc->lock); |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
441 | static inline void sh_rtc_write_alarm_value(struct sh_rtc *rtc, | |
442 | int value, int reg_off) | |
443 | { | |
444 | /* < 0 for a value that is ignored */ | |
445 | if (value < 0) | |
446 | writeb(0, rtc->regbase + reg_off); | |
447 | else | |
448 | writeb(BIN2BCD(value) | AR_ENB, rtc->regbase + reg_off); | |
449 | } | |
450 | ||
451 | static int sh_rtc_check_alarm(struct rtc_time* tm) | |
452 | { | |
453 | /* | |
454 | * The original rtc says anything > 0xc0 is "don't care" or "match | |
455 | * all" - most users use 0xff but rtc-dev uses -1 for the same thing. | |
456 | * The original rtc doesn't support years - some things use -1 and | |
457 | * some 0xffff. We use -1 to make out tests easier. | |
458 | */ | |
459 | if (tm->tm_year == 0xffff) | |
460 | tm->tm_year = -1; | |
461 | if (tm->tm_mon >= 0xff) | |
462 | tm->tm_mon = -1; | |
463 | if (tm->tm_mday >= 0xff) | |
464 | tm->tm_mday = -1; | |
465 | if (tm->tm_wday >= 0xff) | |
466 | tm->tm_wday = -1; | |
467 | if (tm->tm_hour >= 0xff) | |
468 | tm->tm_hour = -1; | |
469 | if (tm->tm_min >= 0xff) | |
470 | tm->tm_min = -1; | |
471 | if (tm->tm_sec >= 0xff) | |
472 | tm->tm_sec = -1; | |
473 | ||
474 | if (tm->tm_year > 9999 || | |
475 | tm->tm_mon >= 12 || | |
476 | tm->tm_mday == 0 || tm->tm_mday >= 32 || | |
477 | tm->tm_wday >= 7 || | |
478 | tm->tm_hour >= 24 || | |
479 | tm->tm_min >= 60 || | |
480 | tm->tm_sec >= 60) | |
481 | return -EINVAL; | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | static int sh_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) | |
487 | { | |
488 | struct platform_device *pdev = to_platform_device(dev); | |
489 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
490 | unsigned int rcr1; | |
491 | struct rtc_time *tm = &wkalrm->time; | |
492 | int mon, err; | |
493 | ||
494 | err = sh_rtc_check_alarm(tm); | |
495 | if (unlikely(err < 0)) | |
496 | return err; | |
497 | ||
498 | spin_lock_irq(&rtc->lock); | |
499 | ||
15c945c3 | 500 | /* disable alarm interrupt and clear the alarm flag */ |
1b73e6ae | 501 | rcr1 = readb(rtc->regbase + RCR1); |
15c945c3 JL |
502 | rcr1 &= ~(RCR1_AF|RCR1_AIE); |
503 | writeb(rcr1, rtc->regbase + RCR1); | |
1b73e6ae JL |
504 | |
505 | rtc->rearm_aie = 0; | |
506 | ||
507 | /* set alarm time */ | |
508 | sh_rtc_write_alarm_value(rtc, tm->tm_sec, RSECAR); | |
509 | sh_rtc_write_alarm_value(rtc, tm->tm_min, RMINAR); | |
510 | sh_rtc_write_alarm_value(rtc, tm->tm_hour, RHRAR); | |
511 | sh_rtc_write_alarm_value(rtc, tm->tm_wday, RWKAR); | |
512 | sh_rtc_write_alarm_value(rtc, tm->tm_mday, RDAYAR); | |
513 | mon = tm->tm_mon; | |
514 | if (mon >= 0) | |
515 | mon += 1; | |
516 | sh_rtc_write_alarm_value(rtc, mon, RMONAR); | |
517 | ||
15c945c3 JL |
518 | if (wkalrm->enabled) { |
519 | rcr1 |= RCR1_AIE; | |
520 | writeb(rcr1, rtc->regbase + RCR1); | |
521 | } | |
1b73e6ae JL |
522 | |
523 | spin_unlock_irq(&rtc->lock); | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
317a6104 PM |
528 | static struct rtc_class_ops sh_rtc_ops = { |
529 | .open = sh_rtc_open, | |
530 | .release = sh_rtc_release, | |
531 | .ioctl = sh_rtc_ioctl, | |
532 | .read_time = sh_rtc_read_time, | |
533 | .set_time = sh_rtc_set_time, | |
1b73e6ae JL |
534 | .read_alarm = sh_rtc_read_alarm, |
535 | .set_alarm = sh_rtc_set_alarm, | |
317a6104 PM |
536 | .proc = sh_rtc_proc, |
537 | }; | |
538 | ||
539 | static int __devinit sh_rtc_probe(struct platform_device *pdev) | |
540 | { | |
541 | struct sh_rtc *rtc; | |
542 | struct resource *res; | |
543 | int ret = -ENOENT; | |
544 | ||
545 | rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL); | |
546 | if (unlikely(!rtc)) | |
547 | return -ENOMEM; | |
548 | ||
549 | spin_lock_init(&rtc->lock); | |
550 | ||
551 | rtc->periodic_irq = platform_get_irq(pdev, 0); | |
552 | if (unlikely(rtc->periodic_irq < 0)) { | |
553 | dev_err(&pdev->dev, "No IRQ for period\n"); | |
554 | goto err_badres; | |
555 | } | |
556 | ||
557 | rtc->carry_irq = platform_get_irq(pdev, 1); | |
558 | if (unlikely(rtc->carry_irq < 0)) { | |
559 | dev_err(&pdev->dev, "No IRQ for carry\n"); | |
560 | goto err_badres; | |
561 | } | |
562 | ||
563 | rtc->alarm_irq = platform_get_irq(pdev, 2); | |
564 | if (unlikely(rtc->alarm_irq < 0)) { | |
565 | dev_err(&pdev->dev, "No IRQ for alarm\n"); | |
566 | goto err_badres; | |
567 | } | |
568 | ||
569 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
570 | if (unlikely(res == NULL)) { | |
571 | dev_err(&pdev->dev, "No IO resource\n"); | |
572 | goto err_badres; | |
573 | } | |
574 | ||
575 | rtc->regsize = res->end - res->start + 1; | |
576 | ||
577 | rtc->res = request_mem_region(res->start, rtc->regsize, pdev->name); | |
578 | if (unlikely(!rtc->res)) { | |
579 | ret = -EBUSY; | |
580 | goto err_badres; | |
581 | } | |
582 | ||
583 | rtc->regbase = (void __iomem *)rtc->res->start; | |
584 | if (unlikely(!rtc->regbase)) { | |
585 | ret = -EINVAL; | |
586 | goto err_badmap; | |
587 | } | |
588 | ||
589 | rtc->rtc_dev = rtc_device_register("sh", &pdev->dev, | |
590 | &sh_rtc_ops, THIS_MODULE); | |
29dd0dae | 591 | if (IS_ERR(rtc->rtc_dev)) { |
317a6104 PM |
592 | ret = PTR_ERR(rtc->rtc_dev); |
593 | goto err_badmap; | |
594 | } | |
595 | ||
ad89f87a PM |
596 | rtc->capabilities = RTC_DEF_CAPABILITIES; |
597 | if (pdev->dev.platform_data) { | |
598 | struct sh_rtc_platform_info *pinfo = pdev->dev.platform_data; | |
599 | ||
600 | /* | |
601 | * Some CPUs have special capabilities in addition to the | |
602 | * default set. Add those in here. | |
603 | */ | |
604 | rtc->capabilities |= pinfo->capabilities; | |
605 | } | |
606 | ||
317a6104 PM |
607 | platform_set_drvdata(pdev, rtc); |
608 | ||
609 | return 0; | |
610 | ||
611 | err_badmap: | |
612 | release_resource(rtc->res); | |
613 | err_badres: | |
614 | kfree(rtc); | |
615 | ||
616 | return ret; | |
617 | } | |
618 | ||
619 | static int __devexit sh_rtc_remove(struct platform_device *pdev) | |
620 | { | |
621 | struct sh_rtc *rtc = platform_get_drvdata(pdev); | |
622 | ||
623 | if (likely(rtc->rtc_dev)) | |
624 | rtc_device_unregister(rtc->rtc_dev); | |
625 | ||
626 | sh_rtc_setpie(&pdev->dev, 0); | |
627 | sh_rtc_setaie(&pdev->dev, 0); | |
628 | ||
629 | release_resource(rtc->res); | |
630 | ||
631 | platform_set_drvdata(pdev, NULL); | |
632 | ||
633 | kfree(rtc); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | static struct platform_driver sh_rtc_platform_driver = { | |
638 | .driver = { | |
1b73e6ae | 639 | .name = DRV_NAME, |
317a6104 PM |
640 | .owner = THIS_MODULE, |
641 | }, | |
642 | .probe = sh_rtc_probe, | |
643 | .remove = __devexit_p(sh_rtc_remove), | |
644 | }; | |
645 | ||
646 | static int __init sh_rtc_init(void) | |
647 | { | |
648 | return platform_driver_register(&sh_rtc_platform_driver); | |
649 | } | |
650 | ||
651 | static void __exit sh_rtc_exit(void) | |
652 | { | |
653 | platform_driver_unregister(&sh_rtc_platform_driver); | |
654 | } | |
655 | ||
656 | module_init(sh_rtc_init); | |
657 | module_exit(sh_rtc_exit); | |
658 | ||
659 | MODULE_DESCRIPTION("SuperH on-chip RTC driver"); | |
1b73e6ae JL |
660 | MODULE_VERSION(DRV_VERSION); |
661 | MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, Jamie Lenehan <lenehan@twibble.org>"); | |
317a6104 | 662 | MODULE_LICENSE("GPL"); |