diff options
-rw-r--r-- | drivers/rtc/Kconfig | 9 | ||||
-rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
-rw-r--r-- | drivers/rtc/rtc-msm6242.c | 269 |
3 files changed, 279 insertions, 0 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 3c20dae43ce2..16c8268da33c 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig | |||
@@ -509,6 +509,15 @@ config RTC_DRV_M48T59 | |||
509 | This driver can also be built as a module, if so, the module | 509 | This driver can also be built as a module, if so, the module |
510 | will be called "rtc-m48t59". | 510 | will be called "rtc-m48t59". |
511 | 511 | ||
512 | config RTC_DRV_MSM6242 | ||
513 | tristate "Oki MSM6242" | ||
514 | help | ||
515 | If you say yes here you get support for the Oki MSM6242 | ||
516 | timekeeping chip. It is used in some Amiga models (e.g. A2000). | ||
517 | |||
518 | This driver can also be built as a module. If so, the module | ||
519 | will be called rtc-msm6242. | ||
520 | |||
512 | config RTC_MXC | 521 | config RTC_MXC |
513 | tristate "Freescale MXC Real Time Clock" | 522 | tristate "Freescale MXC Real Time Clock" |
514 | depends on ARCH_MXC | 523 | depends on ARCH_MXC |
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index aa3fbd5517a1..7e704f67199b 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile | |||
@@ -52,6 +52,7 @@ obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o | |||
52 | obj-$(CONFIG_RTC_MXC) += rtc-mxc.o | 52 | obj-$(CONFIG_RTC_MXC) += rtc-mxc.o |
53 | obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o | 53 | obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o |
54 | obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o | 54 | obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o |
55 | obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o | ||
55 | obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o | 56 | obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o |
56 | obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o | 57 | obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o |
57 | obj-$(CONFIG_RTC_DRV_PCAP) += rtc-pcap.o | 58 | obj-$(CONFIG_RTC_DRV_PCAP) += rtc-pcap.o |
diff --git a/drivers/rtc/rtc-msm6242.c b/drivers/rtc/rtc-msm6242.c new file mode 100644 index 000000000000..5f5968a48925 --- /dev/null +++ b/drivers/rtc/rtc-msm6242.c | |||
@@ -0,0 +1,269 @@ | |||
1 | /* | ||
2 | * Oki MSM6242 RTC Driver | ||
3 | * | ||
4 | * Copyright 2009 Geert Uytterhoeven | ||
5 | * | ||
6 | * Based on the A2000 TOD code in arch/m68k/amiga/config.c | ||
7 | * Copyright (C) 1993 Hamish Macdonald | ||
8 | */ | ||
9 | |||
10 | #include <linux/delay.h> | ||
11 | #include <linux/io.h> | ||
12 | #include <linux/kernel.h> | ||
13 | #include <linux/module.h> | ||
14 | #include <linux/platform_device.h> | ||
15 | #include <linux/rtc.h> | ||
16 | |||
17 | |||
18 | enum { | ||
19 | MSM6242_SECOND1 = 0x0, /* 1-second digit register */ | ||
20 | MSM6242_SECOND10 = 0x1, /* 10-second digit register */ | ||
21 | MSM6242_MINUTE1 = 0x2, /* 1-minute digit register */ | ||
22 | MSM6242_MINUTE10 = 0x3, /* 10-minute digit register */ | ||
23 | MSM6242_HOUR1 = 0x4, /* 1-hour digit register */ | ||
24 | MSM6242_HOUR10 = 0x5, /* PM/AM, 10-hour digit register */ | ||
25 | MSM6242_DAY1 = 0x6, /* 1-day digit register */ | ||
26 | MSM6242_DAY10 = 0x7, /* 10-day digit register */ | ||
27 | MSM6242_MONTH1 = 0x8, /* 1-month digit register */ | ||
28 | MSM6242_MONTH10 = 0x9, /* 10-month digit register */ | ||
29 | MSM6242_YEAR1 = 0xa, /* 1-year digit register */ | ||
30 | MSM6242_YEAR10 = 0xb, /* 10-year digit register */ | ||
31 | MSM6242_WEEK = 0xc, /* Week register */ | ||
32 | MSM6242_CD = 0xd, /* Control Register D */ | ||
33 | MSM6242_CE = 0xe, /* Control Register E */ | ||
34 | MSM6242_CF = 0xf, /* Control Register F */ | ||
35 | }; | ||
36 | |||
37 | #define MSM6242_HOUR10_AM (0 << 2) | ||
38 | #define MSM6242_HOUR10_PM (1 << 2) | ||
39 | #define MSM6242_HOUR10_HR_MASK (3 << 0) | ||
40 | |||
41 | #define MSM6242_WEEK_SUNDAY 0 | ||
42 | #define MSM6242_WEEK_MONDAY 1 | ||
43 | #define MSM6242_WEEK_TUESDAY 2 | ||
44 | #define MSM6242_WEEK_WEDNESDAY 3 | ||
45 | #define MSM6242_WEEK_THURSDAY 4 | ||
46 | #define MSM6242_WEEK_FRIDAY 5 | ||
47 | #define MSM6242_WEEK_SATURDAY 6 | ||
48 | |||
49 | #define MSM6242_CD_30_S_ADJ (1 << 3) /* 30-second adjustment */ | ||
50 | #define MSM6242_CD_IRQ_FLAG (1 << 2) | ||
51 | #define MSM6242_CD_BUSY (1 << 1) | ||
52 | #define MSM6242_CD_HOLD (1 << 0) | ||
53 | |||
54 | #define MSM6242_CE_T_MASK (3 << 2) | ||
55 | #define MSM6242_CE_T_64HZ (0 << 2) /* period 1/64 second */ | ||
56 | #define MSM6242_CE_T_1HZ (1 << 2) /* period 1 second */ | ||
57 | #define MSM6242_CE_T_1MINUTE (2 << 2) /* period 1 minute */ | ||
58 | #define MSM6242_CE_T_1HOUR (3 << 2) /* period 1 hour */ | ||
59 | |||
60 | #define MSM6242_CE_ITRPT_STND (1 << 1) | ||
61 | #define MSM6242_CE_MASK (1 << 0) /* STD.P output control */ | ||
62 | |||
63 | #define MSM6242_CF_TEST (1 << 3) | ||
64 | #define MSM6242_CF_12H (0 << 2) | ||
65 | #define MSM6242_CF_24H (1 << 2) | ||
66 | #define MSM6242_CF_STOP (1 << 1) | ||
67 | #define MSM6242_CF_REST (1 << 0) /* reset */ | ||
68 | |||
69 | |||
70 | struct msm6242_priv { | ||
71 | u32 __iomem *regs; | ||
72 | struct rtc_device *rtc; | ||
73 | }; | ||
74 | |||
75 | static inline unsigned int msm6242_read(struct msm6242_priv *priv, | ||
76 | unsigned int reg) | ||
77 | { | ||
78 | return __raw_readl(&priv->regs[reg]) & 0xf; | ||
79 | } | ||
80 | |||
81 | static inline void msm6242_write(struct msm6242_priv *priv, unsigned int val, | ||
82 | unsigned int reg) | ||
83 | { | ||
84 | return __raw_writel(val, &priv->regs[reg]); | ||
85 | } | ||
86 | |||
87 | static inline void msm6242_set(struct msm6242_priv *priv, unsigned int val, | ||
88 | unsigned int reg) | ||
89 | { | ||
90 | msm6242_write(priv, msm6242_read(priv, reg) | val, reg); | ||
91 | } | ||
92 | |||
93 | static inline void msm6242_clear(struct msm6242_priv *priv, unsigned int val, | ||
94 | unsigned int reg) | ||
95 | { | ||
96 | msm6242_write(priv, msm6242_read(priv, reg) & ~val, reg); | ||
97 | } | ||
98 | |||
99 | static void msm6242_lock(struct msm6242_priv *priv) | ||
100 | { | ||
101 | int cnt = 5; | ||
102 | |||
103 | msm6242_set(priv, MSM6242_CD_HOLD, MSM6242_CD); | ||
104 | |||
105 | while ((msm6242_read(priv, MSM6242_CD) & MSM6242_CD_BUSY) && cnt) { | ||
106 | msm6242_clear(priv, MSM6242_CD_HOLD, MSM6242_CD); | ||
107 | udelay(70); | ||
108 | msm6242_set(priv, MSM6242_CD_HOLD, MSM6242_CD); | ||
109 | cnt--; | ||
110 | } | ||
111 | |||
112 | if (!cnt) | ||
113 | pr_warning("msm6242: timed out waiting for RTC (0x%x)\n", | ||
114 | msm6242_read(priv, MSM6242_CD)); | ||
115 | } | ||
116 | |||
117 | static void msm6242_unlock(struct msm6242_priv *priv) | ||
118 | { | ||
119 | msm6242_clear(priv, MSM6242_CD_HOLD, MSM6242_CD); | ||
120 | } | ||
121 | |||
122 | static int msm6242_read_time(struct device *dev, struct rtc_time *tm) | ||
123 | { | ||
124 | struct msm6242_priv *priv = dev_get_drvdata(dev); | ||
125 | |||
126 | msm6242_lock(priv); | ||
127 | |||
128 | tm->tm_sec = msm6242_read(priv, MSM6242_SECOND10) * 10 + | ||
129 | msm6242_read(priv, MSM6242_SECOND1); | ||
130 | tm->tm_min = msm6242_read(priv, MSM6242_MINUTE10) * 10 + | ||
131 | msm6242_read(priv, MSM6242_MINUTE1); | ||
132 | tm->tm_hour = (msm6242_read(priv, MSM6242_HOUR10 & 3)) * 10 + | ||
133 | msm6242_read(priv, MSM6242_HOUR1); | ||
134 | tm->tm_mday = msm6242_read(priv, MSM6242_DAY10) * 10 + | ||
135 | msm6242_read(priv, MSM6242_DAY1); | ||
136 | tm->tm_wday = msm6242_read(priv, MSM6242_WEEK); | ||
137 | tm->tm_mon = msm6242_read(priv, MSM6242_MONTH10) * 10 + | ||
138 | msm6242_read(priv, MSM6242_MONTH1) - 1; | ||
139 | tm->tm_year = msm6242_read(priv, MSM6242_YEAR10) * 10 + | ||
140 | msm6242_read(priv, MSM6242_YEAR1); | ||
141 | if (tm->tm_year <= 69) | ||
142 | tm->tm_year += 100; | ||
143 | |||
144 | if (!(msm6242_read(priv, MSM6242_CF) & MSM6242_CF_24H)) { | ||
145 | unsigned int pm = msm6242_read(priv, MSM6242_HOUR10) & | ||
146 | MSM6242_HOUR10_PM; | ||
147 | if (!pm && tm->tm_hour == 12) | ||
148 | tm->tm_hour = 0; | ||
149 | else if (pm && tm->tm_hour != 12) | ||
150 | tm->tm_hour += 12; | ||
151 | } | ||
152 | |||
153 | msm6242_unlock(priv); | ||
154 | |||
155 | return rtc_valid_tm(tm); | ||
156 | } | ||
157 | |||
158 | static int msm6242_set_time(struct device *dev, struct rtc_time *tm) | ||
159 | { | ||
160 | struct msm6242_priv *priv = dev_get_drvdata(dev); | ||
161 | |||
162 | msm6242_lock(priv); | ||
163 | |||
164 | msm6242_write(priv, tm->tm_sec / 10, MSM6242_SECOND10); | ||
165 | msm6242_write(priv, tm->tm_sec % 10, MSM6242_SECOND1); | ||
166 | msm6242_write(priv, tm->tm_min / 10, MSM6242_MINUTE10); | ||
167 | msm6242_write(priv, tm->tm_min % 10, MSM6242_MINUTE1); | ||
168 | if (msm6242_read(priv, MSM6242_CF) & MSM6242_CF_24H) | ||
169 | msm6242_write(priv, tm->tm_hour / 10, MSM6242_HOUR10); | ||
170 | else if (tm->tm_hour >= 12) | ||
171 | msm6242_write(priv, MSM6242_HOUR10_PM + (tm->tm_hour - 12) / 10, | ||
172 | MSM6242_HOUR10); | ||
173 | else | ||
174 | msm6242_write(priv, tm->tm_hour / 10, MSM6242_HOUR10); | ||
175 | msm6242_write(priv, tm->tm_hour % 10, MSM6242_HOUR1); | ||
176 | msm6242_write(priv, tm->tm_mday / 10, MSM6242_DAY10); | ||
177 | msm6242_write(priv, tm->tm_mday % 10, MSM6242_DAY1); | ||
178 | if (tm->tm_wday != -1) | ||
179 | msm6242_write(priv, tm->tm_wday, MSM6242_WEEK); | ||
180 | msm6242_write(priv, (tm->tm_mon + 1) / 10, MSM6242_MONTH10); | ||
181 | msm6242_write(priv, (tm->tm_mon + 1) % 10, MSM6242_MONTH1); | ||
182 | if (tm->tm_year >= 100) | ||
183 | tm->tm_year -= 100; | ||
184 | msm6242_write(priv, tm->tm_year / 10, MSM6242_YEAR10); | ||
185 | msm6242_write(priv, tm->tm_year % 10, MSM6242_YEAR1); | ||
186 | |||
187 | msm6242_unlock(priv); | ||
188 | return 0; | ||
189 | } | ||
190 | |||
191 | static const struct rtc_class_ops msm6242_rtc_ops = { | ||
192 | .read_time = msm6242_read_time, | ||
193 | .set_time = msm6242_set_time, | ||
194 | }; | ||
195 | |||
196 | static int __init msm6242_rtc_probe(struct platform_device *dev) | ||
197 | { | ||
198 | struct resource *res; | ||
199 | struct msm6242_priv *priv; | ||
200 | struct rtc_device *rtc; | ||
201 | int error; | ||
202 | |||
203 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); | ||
204 | if (!res) | ||
205 | return -ENODEV; | ||
206 | |||
207 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | ||
208 | if (!priv) | ||
209 | return -ENOMEM; | ||
210 | |||
211 | priv->regs = ioremap(res->start, resource_size(res)); | ||
212 | if (!priv->regs) { | ||
213 | error = -ENOMEM; | ||
214 | goto out_free_priv; | ||
215 | } | ||
216 | |||
217 | rtc = rtc_device_register("rtc-msm6242", &dev->dev, &msm6242_rtc_ops, | ||
218 | THIS_MODULE); | ||
219 | if (IS_ERR(rtc)) { | ||
220 | error = PTR_ERR(rtc); | ||
221 | goto out_unmap; | ||
222 | } | ||
223 | |||
224 | priv->rtc = rtc; | ||
225 | platform_set_drvdata(dev, priv); | ||
226 | return 0; | ||
227 | |||
228 | out_unmap: | ||
229 | iounmap(priv->regs); | ||
230 | out_free_priv: | ||
231 | kfree(priv); | ||
232 | return error; | ||
233 | } | ||
234 | |||
235 | static int __exit msm6242_rtc_remove(struct platform_device *dev) | ||
236 | { | ||
237 | struct msm6242_priv *priv = platform_get_drvdata(dev); | ||
238 | |||
239 | rtc_device_unregister(priv->rtc); | ||
240 | iounmap(priv->regs); | ||
241 | kfree(priv); | ||
242 | return 0; | ||
243 | } | ||
244 | |||
245 | static struct platform_driver msm6242_rtc_driver = { | ||
246 | .driver = { | ||
247 | .name = "rtc-msm6242", | ||
248 | .owner = THIS_MODULE, | ||
249 | }, | ||
250 | .remove = __exit_p(msm6242_rtc_remove), | ||
251 | }; | ||
252 | |||
253 | static int __init msm6242_rtc_init(void) | ||
254 | { | ||
255 | return platform_driver_probe(&msm6242_rtc_driver, msm6242_rtc_probe); | ||
256 | } | ||
257 | |||
258 | static void __exit msm6242_rtc_fini(void) | ||
259 | { | ||
260 | platform_driver_unregister(&msm6242_rtc_driver); | ||
261 | } | ||
262 | |||
263 | module_init(msm6242_rtc_init); | ||
264 | module_exit(msm6242_rtc_fini); | ||
265 | |||
266 | MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>"); | ||
267 | MODULE_LICENSE("GPL"); | ||
268 | MODULE_DESCRIPTION("Oki MSM6242 RTC driver"); | ||
269 | MODULE_ALIAS("platform:rtc-msm6242"); | ||