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-rw-r--r--drivers/rtc/Kconfig165
-rw-r--r--drivers/rtc/Makefile21
-rw-r--r--drivers/rtc/class.c145
-rw-r--r--drivers/rtc/hctosys.c69
-rw-r--r--drivers/rtc/interface.c277
-rw-r--r--drivers/rtc/rtc-dev.c382
-rw-r--r--drivers/rtc/rtc-ds1672.c233
-rw-r--r--drivers/rtc/rtc-ep93xx.c162
-rw-r--r--drivers/rtc/rtc-lib.c101
-rw-r--r--drivers/rtc/rtc-m48t86.c209
-rw-r--r--drivers/rtc/rtc-pcf8563.c353
-rw-r--r--drivers/rtc/rtc-proc.c162
-rw-r--r--drivers/rtc/rtc-rs5c372.c294
-rw-r--r--drivers/rtc/rtc-sa1100.c388
-rw-r--r--drivers/rtc/rtc-sysfs.c124
-rw-r--r--drivers/rtc/rtc-test.c204
-rw-r--r--drivers/rtc/rtc-x1205.c619
17 files changed, 3908 insertions, 0 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
new file mode 100644
index 000000000000..929dd8090578
--- /dev/null
+++ b/drivers/rtc/Kconfig
@@ -0,0 +1,165 @@
1\#
2# RTC class/drivers configuration
3#
4
5menu "Real Time Clock"
6
7config RTC_LIB
8 tristate
9
10config RTC_CLASS
11 tristate "RTC class"
12 depends on EXPERIMENTAL
13 default n
14 select RTC_LIB
15 help
16 Generic RTC class support. If you say yes here, you will
17 be allowed to plug one or more RTCs to your system. You will
18 probably want to enable one of more of the interfaces below.
19
20 This driver can also be built as a module. If so, the module
21 will be called rtc-class.
22
23config RTC_HCTOSYS
24 bool "Set system time from RTC on startup"
25 depends on RTC_CLASS = y
26 default y
27 help
28 If you say yes here, the system time will be set using
29 the value read from the specified RTC device. This is useful
30 in order to avoid unnecessary fschk runs.
31
32config RTC_HCTOSYS_DEVICE
33 string "The RTC to read the time from"
34 depends on RTC_HCTOSYS = y
35 default "rtc0"
36 help
37 The RTC device that will be used as the source for
38 the system time, usually rtc0.
39
40comment "RTC interfaces"
41 depends on RTC_CLASS
42
43config RTC_INTF_SYSFS
44 tristate "sysfs"
45 depends on RTC_CLASS && SYSFS
46 default RTC_CLASS
47 help
48 Say yes here if you want to use your RTC using the sysfs
49 interface, /sys/class/rtc/rtcX .
50
51 This driver can also be built as a module. If so, the module
52 will be called rtc-sysfs.
53
54config RTC_INTF_PROC
55 tristate "proc"
56 depends on RTC_CLASS && PROC_FS
57 default RTC_CLASS
58 help
59 Say yes here if you want to use your RTC using the proc
60 interface, /proc/driver/rtc .
61
62 This driver can also be built as a module. If so, the module
63 will be called rtc-proc.
64
65config RTC_INTF_DEV
66 tristate "dev"
67 depends on RTC_CLASS
68 default RTC_CLASS
69 help
70 Say yes here if you want to use your RTC using the dev
71 interface, /dev/rtc .
72
73 This driver can also be built as a module. If so, the module
74 will be called rtc-dev.
75
76comment "RTC drivers"
77 depends on RTC_CLASS
78
79config RTC_DRV_X1205
80 tristate "Xicor/Intersil X1205"
81 depends on RTC_CLASS && I2C
82 help
83 If you say yes here you get support for the
84 Xicor/Intersil X1205 RTC chip.
85
86 This driver can also be built as a module. If so, the module
87 will be called rtc-x1205.
88
89config RTC_DRV_DS1672
90 tristate "Dallas/Maxim DS1672"
91 depends on RTC_CLASS && I2C
92 help
93 If you say yes here you get support for the
94 Dallas/Maxim DS1672 timekeeping chip.
95
96 This driver can also be built as a module. If so, the module
97 will be called rtc-ds1672.
98
99config RTC_DRV_PCF8563
100 tristate "Philips PCF8563/Epson RTC8564"
101 depends on RTC_CLASS && I2C
102 help
103 If you say yes here you get support for the
104 Philips PCF8563 RTC chip. The Epson RTC8564
105 should work as well.
106
107 This driver can also be built as a module. If so, the module
108 will be called rtc-pcf8563.
109
110config RTC_DRV_RS5C372
111 tristate "Ricoh RS5C372A/B"
112 depends on RTC_CLASS && I2C
113 help
114 If you say yes here you get support for the
115 Ricoh RS5C372A and RS5C372B RTC chips.
116
117 This driver can also be built as a module. If so, the module
118 will be called rtc-rs5c372.
119
120config RTC_DRV_M48T86
121 tristate "ST M48T86/Dallas DS12887"
122 depends on RTC_CLASS
123 help
124 If you say Y here you will get support for the
125 ST M48T86 and Dallas DS12887 RTC chips.
126
127 This driver can also be built as a module. If so, the module
128 will be called rtc-m48t86.
129
130config RTC_DRV_EP93XX
131 tristate "Cirrus Logic EP93XX"
132 depends on RTC_CLASS && ARCH_EP93XX
133 help
134 If you say yes here you get support for the
135 RTC embedded in the Cirrus Logic EP93XX processors.
136
137 This driver can also be built as a module. If so, the module
138 will be called rtc-ep93xx.
139
140config RTC_DRV_SA1100
141 tristate "SA11x0/PXA2xx"
142 depends on RTC_CLASS && (ARCH_SA1100 || ARCH_PXA)
143 help
144 If you say Y here you will get access to the real time clock
145 built into your SA11x0 or PXA2xx CPU.
146
147 To compile this driver as a module, choose M here: the
148 module will be called rtc-sa1100.
149
150config RTC_DRV_TEST
151 tristate "Test driver/device"
152 depends on RTC_CLASS
153 help
154 If you say yes here you get support for the
155 RTC test driver. It's a software RTC which can be
156 used to test the RTC subsystem APIs. It gets
157 the time from the system clock.
158 You want this driver only if you are doing development
159 on the RTC subsystem. Please read the source code
160 for further details.
161
162 This driver can also be built as a module. If so, the module
163 will be called rtc-test.
164
165endmenu
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
new file mode 100644
index 000000000000..8d4c7fe88d58
--- /dev/null
+++ b/drivers/rtc/Makefile
@@ -0,0 +1,21 @@
1#
2# Makefile for RTC class/drivers.
3#
4
5obj-$(CONFIG_RTC_LIB) += rtc-lib.o
6obj-$(CONFIG_RTC_HCTOSYS) += hctosys.o
7obj-$(CONFIG_RTC_CLASS) += rtc-core.o
8rtc-core-y := class.o interface.o
9
10obj-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o
11obj-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o
12obj-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o
13
14obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
15obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o
16obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o
17obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o
18obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
19obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o
20obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
21obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o
diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
new file mode 100644
index 000000000000..8533936d50d8
--- /dev/null
+++ b/drivers/rtc/class.c
@@ -0,0 +1,145 @@
1/*
2 * RTC subsystem, base class
3 *
4 * Copyright (C) 2005 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * class skeleton from drivers/hwmon/hwmon.c
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/module.h>
15#include <linux/rtc.h>
16#include <linux/kdev_t.h>
17#include <linux/idr.h>
18
19static DEFINE_IDR(rtc_idr);
20static DEFINE_MUTEX(idr_lock);
21struct class *rtc_class;
22
23static void rtc_device_release(struct class_device *class_dev)
24{
25 struct rtc_device *rtc = to_rtc_device(class_dev);
26 mutex_lock(&idr_lock);
27 idr_remove(&rtc_idr, rtc->id);
28 mutex_unlock(&idr_lock);
29 kfree(rtc);
30}
31
32/**
33 * rtc_device_register - register w/ RTC class
34 * @dev: the device to register
35 *
36 * rtc_device_unregister() must be called when the class device is no
37 * longer needed.
38 *
39 * Returns the pointer to the new struct class device.
40 */
41struct rtc_device *rtc_device_register(const char *name, struct device *dev,
42 struct rtc_class_ops *ops,
43 struct module *owner)
44{
45 struct rtc_device *rtc;
46 int id, err;
47
48 if (idr_pre_get(&rtc_idr, GFP_KERNEL) == 0) {
49 err = -ENOMEM;
50 goto exit;
51 }
52
53
54 mutex_lock(&idr_lock);
55 err = idr_get_new(&rtc_idr, NULL, &id);
56 mutex_unlock(&idr_lock);
57
58 if (err < 0)
59 goto exit;
60
61 id = id & MAX_ID_MASK;
62
63 rtc = kzalloc(sizeof(struct rtc_device), GFP_KERNEL);
64 if (rtc == NULL) {
65 err = -ENOMEM;
66 goto exit_idr;
67 }
68
69 rtc->id = id;
70 rtc->ops = ops;
71 rtc->owner = owner;
72 rtc->class_dev.dev = dev;
73 rtc->class_dev.class = rtc_class;
74 rtc->class_dev.release = rtc_device_release;
75
76 mutex_init(&rtc->ops_lock);
77 spin_lock_init(&rtc->irq_lock);
78 spin_lock_init(&rtc->irq_task_lock);
79
80 strlcpy(rtc->name, name, RTC_DEVICE_NAME_SIZE);
81 snprintf(rtc->class_dev.class_id, BUS_ID_SIZE, "rtc%d", id);
82
83 err = class_device_register(&rtc->class_dev);
84 if (err)
85 goto exit_kfree;
86
87 dev_info(dev, "rtc core: registered %s as %s\n",
88 rtc->name, rtc->class_dev.class_id);
89
90 return rtc;
91
92exit_kfree:
93 kfree(rtc);
94
95exit_idr:
96 idr_remove(&rtc_idr, id);
97
98exit:
99 return ERR_PTR(err);
100}
101EXPORT_SYMBOL_GPL(rtc_device_register);
102
103
104/**
105 * rtc_device_unregister - removes the previously registered RTC class device
106 *
107 * @rtc: the RTC class device to destroy
108 */
109void rtc_device_unregister(struct rtc_device *rtc)
110{
111 mutex_lock(&rtc->ops_lock);
112 rtc->ops = NULL;
113 mutex_unlock(&rtc->ops_lock);
114 class_device_unregister(&rtc->class_dev);
115}
116EXPORT_SYMBOL_GPL(rtc_device_unregister);
117
118int rtc_interface_register(struct class_interface *intf)
119{
120 intf->class = rtc_class;
121 return class_interface_register(intf);
122}
123EXPORT_SYMBOL_GPL(rtc_interface_register);
124
125static int __init rtc_init(void)
126{
127 rtc_class = class_create(THIS_MODULE, "rtc");
128 if (IS_ERR(rtc_class)) {
129 printk(KERN_ERR "%s: couldn't create class\n", __FILE__);
130 return PTR_ERR(rtc_class);
131 }
132 return 0;
133}
134
135static void __exit rtc_exit(void)
136{
137 class_destroy(rtc_class);
138}
139
140module_init(rtc_init);
141module_exit(rtc_exit);
142
143MODULE_AUTHOR("Alessandro Zummo <a.zummo@towerteh.it>");
144MODULE_DESCRIPTION("RTC class support");
145MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/hctosys.c b/drivers/rtc/hctosys.c
new file mode 100644
index 000000000000..d02fe9a0001f
--- /dev/null
+++ b/drivers/rtc/hctosys.c
@@ -0,0 +1,69 @@
1/*
2 * RTC subsystem, initialize system time on startup
3 *
4 * Copyright (C) 2005 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10*/
11
12#include <linux/rtc.h>
13
14/* IMPORTANT: the RTC only stores whole seconds. It is arbitrary
15 * whether it stores the most close value or the value with partial
16 * seconds truncated. However, it is important that we use it to store
17 * the truncated value. This is because otherwise it is necessary,
18 * in an rtc sync function, to read both xtime.tv_sec and
19 * xtime.tv_nsec. On some processors (i.e. ARM), an atomic read
20 * of >32bits is not possible. So storing the most close value would
21 * slow down the sync API. So here we have the truncated value and
22 * the best guess is to add 0.5s.
23 */
24
25static int __init rtc_hctosys(void)
26{
27 int err;
28 struct rtc_time tm;
29 struct class_device *class_dev = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE);
30
31 if (class_dev == NULL) {
32 printk("%s: unable to open rtc device (%s)\n",
33 __FILE__, CONFIG_RTC_HCTOSYS_DEVICE);
34 return -ENODEV;
35 }
36
37 err = rtc_read_time(class_dev, &tm);
38 if (err == 0) {
39 err = rtc_valid_tm(&tm);
40 if (err == 0) {
41 struct timespec tv;
42
43 tv.tv_nsec = NSEC_PER_SEC >> 1;
44
45 rtc_tm_to_time(&tm, &tv.tv_sec);
46
47 do_settimeofday(&tv);
48
49 dev_info(class_dev->dev,
50 "setting the system clock to "
51 "%d-%02d-%02d %02d:%02d:%02d (%u)\n",
52 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
53 tm.tm_hour, tm.tm_min, tm.tm_sec,
54 (unsigned int) tv.tv_sec);
55 }
56 else
57 dev_err(class_dev->dev,
58 "hctosys: invalid date/time\n");
59 }
60 else
61 dev_err(class_dev->dev,
62 "hctosys: unable to read the hardware clock\n");
63
64 rtc_class_close(class_dev);
65
66 return 0;
67}
68
69late_initcall(rtc_hctosys);
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
new file mode 100644
index 000000000000..56e490709b87
--- /dev/null
+++ b/drivers/rtc/interface.c
@@ -0,0 +1,277 @@
1/*
2 * RTC subsystem, interface functions
3 *
4 * Copyright (C) 2005 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * based on arch/arm/common/rtctime.c
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/rtc.h>
15
16int rtc_read_time(struct class_device *class_dev, struct rtc_time *tm)
17{
18 int err;
19 struct rtc_device *rtc = to_rtc_device(class_dev);
20
21 err = mutex_lock_interruptible(&rtc->ops_lock);
22 if (err)
23 return -EBUSY;
24
25 if (!rtc->ops)
26 err = -ENODEV;
27 else if (!rtc->ops->read_time)
28 err = -EINVAL;
29 else {
30 memset(tm, 0, sizeof(struct rtc_time));
31 err = rtc->ops->read_time(class_dev->dev, tm);
32 }
33
34 mutex_unlock(&rtc->ops_lock);
35 return err;
36}
37EXPORT_SYMBOL_GPL(rtc_read_time);
38
39int rtc_set_time(struct class_device *class_dev, struct rtc_time *tm)
40{
41 int err;
42 struct rtc_device *rtc = to_rtc_device(class_dev);
43
44 err = rtc_valid_tm(tm);
45 if (err != 0)
46 return err;
47
48 err = mutex_lock_interruptible(&rtc->ops_lock);
49 if (err)
50 return -EBUSY;
51
52 if (!rtc->ops)
53 err = -ENODEV;
54 else if (!rtc->ops->set_time)
55 err = -EINVAL;
56 else
57 err = rtc->ops->set_time(class_dev->dev, tm);
58
59 mutex_unlock(&rtc->ops_lock);
60 return err;
61}
62EXPORT_SYMBOL_GPL(rtc_set_time);
63
64int rtc_set_mmss(struct class_device *class_dev, unsigned long secs)
65{
66 int err;
67 struct rtc_device *rtc = to_rtc_device(class_dev);
68
69 err = mutex_lock_interruptible(&rtc->ops_lock);
70 if (err)
71 return -EBUSY;
72
73 if (!rtc->ops)
74 err = -ENODEV;
75 else if (rtc->ops->set_mmss)
76 err = rtc->ops->set_mmss(class_dev->dev, secs);
77 else if (rtc->ops->read_time && rtc->ops->set_time) {
78 struct rtc_time new, old;
79
80 err = rtc->ops->read_time(class_dev->dev, &old);
81 if (err == 0) {
82 rtc_time_to_tm(secs, &new);
83
84 /*
85 * avoid writing when we're going to change the day of
86 * the month. We will retry in the next minute. This
87 * basically means that if the RTC must not drift
88 * by more than 1 minute in 11 minutes.
89 */
90 if (!((old.tm_hour == 23 && old.tm_min == 59) ||
91 (new.tm_hour == 23 && new.tm_min == 59)))
92 err = rtc->ops->set_time(class_dev->dev, &new);
93 }
94 }
95 else
96 err = -EINVAL;
97
98 mutex_unlock(&rtc->ops_lock);
99
100 return err;
101}
102EXPORT_SYMBOL_GPL(rtc_set_mmss);
103
104int rtc_read_alarm(struct class_device *class_dev, struct rtc_wkalrm *alarm)
105{
106 int err;
107 struct rtc_device *rtc = to_rtc_device(class_dev);
108
109 err = mutex_lock_interruptible(&rtc->ops_lock);
110 if (err)
111 return -EBUSY;
112
113 if (rtc->ops == NULL)
114 err = -ENODEV;
115 else if (!rtc->ops->read_alarm)
116 err = -EINVAL;
117 else {
118 memset(alarm, 0, sizeof(struct rtc_wkalrm));
119 err = rtc->ops->read_alarm(class_dev->dev, alarm);
120 }
121
122 mutex_unlock(&rtc->ops_lock);
123 return err;
124}
125EXPORT_SYMBOL_GPL(rtc_read_alarm);
126
127int rtc_set_alarm(struct class_device *class_dev, struct rtc_wkalrm *alarm)
128{
129 int err;
130 struct rtc_device *rtc = to_rtc_device(class_dev);
131
132 err = mutex_lock_interruptible(&rtc->ops_lock);
133 if (err)
134 return -EBUSY;
135
136 if (!rtc->ops)
137 err = -ENODEV;
138 else if (!rtc->ops->set_alarm)
139 err = -EINVAL;
140 else
141 err = rtc->ops->set_alarm(class_dev->dev, alarm);
142
143 mutex_unlock(&rtc->ops_lock);
144 return err;
145}
146EXPORT_SYMBOL_GPL(rtc_set_alarm);
147
148void rtc_update_irq(struct class_device *class_dev,
149 unsigned long num, unsigned long events)
150{
151 struct rtc_device *rtc = to_rtc_device(class_dev);
152
153 spin_lock(&rtc->irq_lock);
154 rtc->irq_data = (rtc->irq_data + (num << 8)) | events;
155 spin_unlock(&rtc->irq_lock);
156
157 spin_lock(&rtc->irq_task_lock);
158 if (rtc->irq_task)
159 rtc->irq_task->func(rtc->irq_task->private_data);
160 spin_unlock(&rtc->irq_task_lock);
161
162 wake_up_interruptible(&rtc->irq_queue);
163 kill_fasync(&rtc->async_queue, SIGIO, POLL_IN);
164}
165EXPORT_SYMBOL_GPL(rtc_update_irq);
166
167struct class_device *rtc_class_open(char *name)
168{
169 struct class_device *class_dev = NULL,
170 *class_dev_tmp;
171
172 down(&rtc_class->sem);
173 list_for_each_entry(class_dev_tmp, &rtc_class->children, node) {
174 if (strncmp(class_dev_tmp->class_id, name, BUS_ID_SIZE) == 0) {
175 class_dev = class_dev_tmp;
176 break;
177 }
178 }
179
180 if (class_dev) {
181 if (!try_module_get(to_rtc_device(class_dev)->owner))
182 class_dev = NULL;
183 }
184 up(&rtc_class->sem);
185
186 return class_dev;
187}
188EXPORT_SYMBOL_GPL(rtc_class_open);
189
190void rtc_class_close(struct class_device *class_dev)
191{
192 module_put(to_rtc_device(class_dev)->owner);
193}
194EXPORT_SYMBOL_GPL(rtc_class_close);
195
196int rtc_irq_register(struct class_device *class_dev, struct rtc_task *task)
197{
198 int retval = -EBUSY;
199 struct rtc_device *rtc = to_rtc_device(class_dev);
200
201 if (task == NULL || task->func == NULL)
202 return -EINVAL;
203
204 spin_lock(&rtc->irq_task_lock);
205 if (rtc->irq_task == NULL) {
206 rtc->irq_task = task;
207 retval = 0;
208 }
209 spin_unlock(&rtc->irq_task_lock);
210
211 return retval;
212}
213EXPORT_SYMBOL_GPL(rtc_irq_register);
214
215void rtc_irq_unregister(struct class_device *class_dev, struct rtc_task *task)
216{
217 struct rtc_device *rtc = to_rtc_device(class_dev);
218
219 spin_lock(&rtc->irq_task_lock);
220 if (rtc->irq_task == task)
221 rtc->irq_task = NULL;
222 spin_unlock(&rtc->irq_task_lock);
223}
224EXPORT_SYMBOL_GPL(rtc_irq_unregister);
225
226int rtc_irq_set_state(struct class_device *class_dev, struct rtc_task *task, int enabled)
227{
228 int err = 0;
229 unsigned long flags;
230 struct rtc_device *rtc = to_rtc_device(class_dev);
231
232 spin_lock_irqsave(&rtc->irq_task_lock, flags);
233 if (rtc->irq_task != task)
234 err = -ENXIO;
235 spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
236
237 if (err == 0)
238 err = rtc->ops->irq_set_state(class_dev->dev, enabled);
239
240 return err;
241}
242EXPORT_SYMBOL_GPL(rtc_irq_set_state);
243
244int rtc_irq_set_freq(struct class_device *class_dev, struct rtc_task *task, int freq)
245{
246 int err = 0, tmp = 0;
247 unsigned long flags;
248 struct rtc_device *rtc = to_rtc_device(class_dev);
249
250 /* allowed range is 2-8192 */
251 if (freq < 2 || freq > 8192)
252 return -EINVAL;
253/*
254 FIXME: this does not belong here, will move where appropriate
255 at a later stage. It cannot hurt right now, trust me :)
256 if ((freq > rtc_max_user_freq) && (!capable(CAP_SYS_RESOURCE)))
257 return -EACCES;
258*/
259 /* check if freq is a power of 2 */
260 while (freq > (1 << tmp))
261 tmp++;
262
263 if (freq != (1 << tmp))
264 return -EINVAL;
265
266 spin_lock_irqsave(&rtc->irq_task_lock, flags);
267 if (rtc->irq_task != task)
268 err = -ENXIO;
269 spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
270
271 if (err == 0) {
272 err = rtc->ops->irq_set_freq(class_dev->dev, freq);
273 if (err == 0)
274 rtc->irq_freq = freq;
275 }
276 return err;
277}
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
new file mode 100644
index 000000000000..b1e3e6179e56
--- /dev/null
+++ b/drivers/rtc/rtc-dev.c
@@ -0,0 +1,382 @@
1/*
2 * RTC subsystem, dev interface
3 *
4 * Copyright (C) 2005 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * based on arch/arm/common/rtctime.c
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/module.h>
15#include <linux/rtc.h>
16
17static struct class *rtc_dev_class;
18static dev_t rtc_devt;
19
20#define RTC_DEV_MAX 16 /* 16 RTCs should be enough for everyone... */
21
22static int rtc_dev_open(struct inode *inode, struct file *file)
23{
24 int err;
25 struct rtc_device *rtc = container_of(inode->i_cdev,
26 struct rtc_device, char_dev);
27 struct rtc_class_ops *ops = rtc->ops;
28
29 /* We keep the lock as long as the device is in use
30 * and return immediately if busy
31 */
32 if (!(mutex_trylock(&rtc->char_lock)))
33 return -EBUSY;
34
35 file->private_data = &rtc->class_dev;
36
37 err = ops->open ? ops->open(rtc->class_dev.dev) : 0;
38 if (err == 0) {
39 spin_lock_irq(&rtc->irq_lock);
40 rtc->irq_data = 0;
41 spin_unlock_irq(&rtc->irq_lock);
42
43 return 0;
44 }
45
46 /* something has gone wrong, release the lock */
47 mutex_unlock(&rtc->char_lock);
48 return err;
49}
50
51
52static ssize_t
53rtc_dev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
54{
55 struct rtc_device *rtc = to_rtc_device(file->private_data);
56
57 DECLARE_WAITQUEUE(wait, current);
58 unsigned long data;
59 ssize_t ret;
60
61 if (count < sizeof(unsigned long))
62 return -EINVAL;
63
64 add_wait_queue(&rtc->irq_queue, &wait);
65 do {
66 __set_current_state(TASK_INTERRUPTIBLE);
67
68 spin_lock_irq(&rtc->irq_lock);
69 data = rtc->irq_data;
70 rtc->irq_data = 0;
71 spin_unlock_irq(&rtc->irq_lock);
72
73 if (data != 0) {
74 ret = 0;
75 break;
76 }
77 if (file->f_flags & O_NONBLOCK) {
78 ret = -EAGAIN;
79 break;
80 }
81 if (signal_pending(current)) {
82 ret = -ERESTARTSYS;
83 break;
84 }
85 schedule();
86 } while (1);
87 set_current_state(TASK_RUNNING);
88 remove_wait_queue(&rtc->irq_queue, &wait);
89
90 if (ret == 0) {
91 /* Check for any data updates */
92 if (rtc->ops->read_callback)
93 data = rtc->ops->read_callback(rtc->class_dev.dev, data);
94
95 ret = put_user(data, (unsigned long __user *)buf);
96 if (ret == 0)
97 ret = sizeof(unsigned long);
98 }
99 return ret;
100}
101
102static unsigned int rtc_dev_poll(struct file *file, poll_table *wait)
103{
104 struct rtc_device *rtc = to_rtc_device(file->private_data);
105 unsigned long data;
106
107 poll_wait(file, &rtc->irq_queue, wait);
108
109 data = rtc->irq_data;
110
111 return (data != 0) ? (POLLIN | POLLRDNORM) : 0;
112}
113
114static int rtc_dev_ioctl(struct inode *inode, struct file *file,
115 unsigned int cmd, unsigned long arg)
116{
117 int err = 0;
118 struct class_device *class_dev = file->private_data;
119 struct rtc_device *rtc = to_rtc_device(class_dev);
120 struct rtc_class_ops *ops = rtc->ops;
121 struct rtc_time tm;
122 struct rtc_wkalrm alarm;
123 void __user *uarg = (void __user *) arg;
124
125 /* avoid conflicting IRQ users */
126 if (cmd == RTC_PIE_ON || cmd == RTC_PIE_OFF || cmd == RTC_IRQP_SET) {
127 spin_lock(&rtc->irq_task_lock);
128 if (rtc->irq_task)
129 err = -EBUSY;
130 spin_unlock(&rtc->irq_task_lock);
131
132 if (err < 0)
133 return err;
134 }
135
136 /* try the driver's ioctl interface */
137 if (ops->ioctl) {
138 err = ops->ioctl(class_dev->dev, cmd, arg);
139 if (err != -EINVAL)
140 return err;
141 }
142
143 /* if the driver does not provide the ioctl interface
144 * or if that particular ioctl was not implemented
145 * (-EINVAL), we will try to emulate here.
146 */
147
148 switch (cmd) {
149 case RTC_ALM_READ:
150 err = rtc_read_alarm(class_dev, &alarm);
151 if (err < 0)
152 return err;
153
154 if (copy_to_user(uarg, &alarm.time, sizeof(tm)))
155 return -EFAULT;
156 break;
157
158 case RTC_ALM_SET:
159 if (copy_from_user(&alarm.time, uarg, sizeof(tm)))
160 return -EFAULT;
161
162 alarm.enabled = 0;
163 alarm.pending = 0;
164 alarm.time.tm_mday = -1;
165 alarm.time.tm_mon = -1;
166 alarm.time.tm_year = -1;
167 alarm.time.tm_wday = -1;
168 alarm.time.tm_yday = -1;
169 alarm.time.tm_isdst = -1;
170 err = rtc_set_alarm(class_dev, &alarm);
171 break;
172
173 case RTC_RD_TIME:
174 err = rtc_read_time(class_dev, &tm);
175 if (err < 0)
176 return err;
177
178 if (copy_to_user(uarg, &tm, sizeof(tm)))
179 return -EFAULT;
180 break;
181
182 case RTC_SET_TIME:
183 if (!capable(CAP_SYS_TIME))
184 return -EACCES;
185
186 if (copy_from_user(&tm, uarg, sizeof(tm)))
187 return -EFAULT;
188
189 err = rtc_set_time(class_dev, &tm);
190 break;
191#if 0
192 case RTC_EPOCH_SET:
193#ifndef rtc_epoch
194 /*
195 * There were no RTC clocks before 1900.
196 */
197 if (arg < 1900) {
198 err = -EINVAL;
199 break;
200 }
201 if (!capable(CAP_SYS_TIME)) {
202 err = -EACCES;
203 break;
204 }
205 rtc_epoch = arg;
206 err = 0;
207#endif
208 break;
209
210 case RTC_EPOCH_READ:
211 err = put_user(rtc_epoch, (unsigned long __user *)uarg);
212 break;
213#endif
214 case RTC_WKALM_SET:
215 if (copy_from_user(&alarm, uarg, sizeof(alarm)))
216 return -EFAULT;
217
218 err = rtc_set_alarm(class_dev, &alarm);
219 break;
220
221 case RTC_WKALM_RD:
222 err = rtc_read_alarm(class_dev, &alarm);
223 if (err < 0)
224 return err;
225
226 if (copy_to_user(uarg, &alarm, sizeof(alarm)))
227 return -EFAULT;
228 break;
229
230 default:
231 err = -EINVAL;
232 break;
233 }
234
235 return err;
236}
237
238static int rtc_dev_release(struct inode *inode, struct file *file)
239{
240 struct rtc_device *rtc = to_rtc_device(file->private_data);
241
242 if (rtc->ops->release)
243 rtc->ops->release(rtc->class_dev.dev);
244
245 mutex_unlock(&rtc->char_lock);
246 return 0;
247}
248
249static int rtc_dev_fasync(int fd, struct file *file, int on)
250{
251 struct rtc_device *rtc = to_rtc_device(file->private_data);
252 return fasync_helper(fd, file, on, &rtc->async_queue);
253}
254
255static struct file_operations rtc_dev_fops = {
256 .owner = THIS_MODULE,
257 .llseek = no_llseek,
258 .read = rtc_dev_read,
259 .poll = rtc_dev_poll,
260 .ioctl = rtc_dev_ioctl,
261 .open = rtc_dev_open,
262 .release = rtc_dev_release,
263 .fasync = rtc_dev_fasync,
264};
265
266/* insertion/removal hooks */
267
268static int rtc_dev_add_device(struct class_device *class_dev,
269 struct class_interface *class_intf)
270{
271 int err = 0;
272 struct rtc_device *rtc = to_rtc_device(class_dev);
273
274 if (rtc->id >= RTC_DEV_MAX) {
275 dev_err(class_dev->dev, "too many RTCs\n");
276 return -EINVAL;
277 }
278
279 mutex_init(&rtc->char_lock);
280 spin_lock_init(&rtc->irq_lock);
281 init_waitqueue_head(&rtc->irq_queue);
282
283 cdev_init(&rtc->char_dev, &rtc_dev_fops);
284 rtc->char_dev.owner = rtc->owner;
285
286 if (cdev_add(&rtc->char_dev, MKDEV(MAJOR(rtc_devt), rtc->id), 1)) {
287 cdev_del(&rtc->char_dev);
288 dev_err(class_dev->dev,
289 "failed to add char device %d:%d\n",
290 MAJOR(rtc_devt), rtc->id);
291 return -ENODEV;
292 }
293
294 rtc->rtc_dev = class_device_create(rtc_dev_class, NULL,
295 MKDEV(MAJOR(rtc_devt), rtc->id),
296 class_dev->dev, "rtc%d", rtc->id);
297 if (IS_ERR(rtc->rtc_dev)) {
298 dev_err(class_dev->dev, "cannot create rtc_dev device\n");
299 err = PTR_ERR(rtc->rtc_dev);
300 goto err_cdev_del;
301 }
302
303 dev_info(class_dev->dev, "rtc intf: dev (%d:%d)\n",
304 MAJOR(rtc->rtc_dev->devt),
305 MINOR(rtc->rtc_dev->devt));
306
307 return 0;
308
309err_cdev_del:
310
311 cdev_del(&rtc->char_dev);
312 return err;
313}
314
315static void rtc_dev_remove_device(struct class_device *class_dev,
316 struct class_interface *class_intf)
317{
318 struct rtc_device *rtc = to_rtc_device(class_dev);
319
320 if (rtc->rtc_dev) {
321 dev_dbg(class_dev->dev, "removing char %d:%d\n",
322 MAJOR(rtc->rtc_dev->devt),
323 MINOR(rtc->rtc_dev->devt));
324
325 class_device_unregister(rtc->rtc_dev);
326 cdev_del(&rtc->char_dev);
327 }
328}
329
330/* interface registration */
331
332static struct class_interface rtc_dev_interface = {
333 .add = &rtc_dev_add_device,
334 .remove = &rtc_dev_remove_device,
335};
336
337static int __init rtc_dev_init(void)
338{
339 int err;
340
341 rtc_dev_class = class_create(THIS_MODULE, "rtc-dev");
342 if (IS_ERR(rtc_dev_class))
343 return PTR_ERR(rtc_dev_class);
344
345 err = alloc_chrdev_region(&rtc_devt, 0, RTC_DEV_MAX, "rtc");
346 if (err < 0) {
347 printk(KERN_ERR "%s: failed to allocate char dev region\n",
348 __FILE__);
349 goto err_destroy_class;
350 }
351
352 err = rtc_interface_register(&rtc_dev_interface);
353 if (err < 0) {
354 printk(KERN_ERR "%s: failed to register the interface\n",
355 __FILE__);
356 goto err_unregister_chrdev;
357 }
358
359 return 0;
360
361err_unregister_chrdev:
362 unregister_chrdev_region(rtc_devt, RTC_DEV_MAX);
363
364err_destroy_class:
365 class_destroy(rtc_dev_class);
366
367 return err;
368}
369
370static void __exit rtc_dev_exit(void)
371{
372 class_interface_unregister(&rtc_dev_interface);
373 class_destroy(rtc_dev_class);
374 unregister_chrdev_region(rtc_devt, RTC_DEV_MAX);
375}
376
377module_init(rtc_dev_init);
378module_exit(rtc_dev_exit);
379
380MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
381MODULE_DESCRIPTION("RTC class dev interface");
382MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c
new file mode 100644
index 000000000000..358695a416f3
--- /dev/null
+++ b/drivers/rtc/rtc-ds1672.c
@@ -0,0 +1,233 @@
1/*
2 * An rtc/i2c driver for the Dallas DS1672
3 * Copyright 2005 Alessandro Zummo
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#include <linux/module.h>
11#include <linux/i2c.h>
12#include <linux/rtc.h>
13
14#define DRV_VERSION "0.2"
15
16/* Addresses to scan: none. This chip cannot be detected. */
17static unsigned short normal_i2c[] = { I2C_CLIENT_END };
18
19/* Insmod parameters */
20I2C_CLIENT_INSMOD;
21
22/* Registers */
23
24#define DS1672_REG_CNT_BASE 0
25#define DS1672_REG_CONTROL 4
26#define DS1672_REG_TRICKLE 5
27
28
29/* Prototypes */
30static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind);
31
32/*
33 * In the routines that deal directly with the ds1672 hardware, we use
34 * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch
35 * Epoch is initialized as 2000. Time is set to UTC.
36 */
37static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm)
38{
39 unsigned long time;
40 unsigned char addr = DS1672_REG_CNT_BASE;
41 unsigned char buf[4];
42
43 struct i2c_msg msgs[] = {
44 { client->addr, 0, 1, &addr }, /* setup read ptr */
45 { client->addr, I2C_M_RD, 4, buf }, /* read date */
46 };
47
48 /* read date registers */
49 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
50 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
51 return -EIO;
52 }
53
54 dev_dbg(&client->dev,
55 "%s: raw read data - counters=%02x,%02x,%02x,%02x\n"
56 __FUNCTION__,
57 buf[0], buf[1], buf[2], buf[3]);
58
59 time = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
60
61 rtc_time_to_tm(time, tm);
62
63 dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
64 "mday=%d, mon=%d, year=%d, wday=%d\n",
65 __FUNCTION__,
66 tm->tm_sec, tm->tm_min, tm->tm_hour,
67 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
68
69 return 0;
70}
71
72static int ds1672_set_mmss(struct i2c_client *client, unsigned long secs)
73{
74 int xfer;
75 unsigned char buf[5];
76
77 buf[0] = DS1672_REG_CNT_BASE;
78 buf[1] = secs & 0x000000FF;
79 buf[2] = (secs & 0x0000FF00) >> 8;
80 buf[3] = (secs & 0x00FF0000) >> 16;
81 buf[4] = (secs & 0xFF000000) >> 24;
82
83 xfer = i2c_master_send(client, buf, 5);
84 if (xfer != 5) {
85 dev_err(&client->dev, "%s: send: %d\n", __FUNCTION__, xfer);
86 return -EIO;
87 }
88
89 return 0;
90}
91
92static int ds1672_set_datetime(struct i2c_client *client, struct rtc_time *tm)
93{
94 unsigned long secs;
95
96 dev_dbg(&client->dev,
97 "%s: secs=%d, mins=%d, hours=%d, ",
98 "mday=%d, mon=%d, year=%d, wday=%d\n",
99 __FUNCTION__,
100 tm->tm_sec, tm->tm_min, tm->tm_hour,
101 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
102
103 rtc_tm_to_time(tm, &secs);
104
105 return ds1672_set_mmss(client, secs);
106}
107
108static int ds1672_rtc_read_time(struct device *dev, struct rtc_time *tm)
109{
110 return ds1672_get_datetime(to_i2c_client(dev), tm);
111}
112
113static int ds1672_rtc_set_time(struct device *dev, struct rtc_time *tm)
114{
115 return ds1672_set_datetime(to_i2c_client(dev), tm);
116}
117
118static int ds1672_rtc_set_mmss(struct device *dev, unsigned long secs)
119{
120 return ds1672_set_mmss(to_i2c_client(dev), secs);
121}
122
123static struct rtc_class_ops ds1672_rtc_ops = {
124 .read_time = ds1672_rtc_read_time,
125 .set_time = ds1672_rtc_set_time,
126 .set_mmss = ds1672_rtc_set_mmss,
127};
128
129static int ds1672_attach(struct i2c_adapter *adapter)
130{
131 dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
132 return i2c_probe(adapter, &addr_data, ds1672_probe);
133}
134
135static int ds1672_detach(struct i2c_client *client)
136{
137 int err;
138 struct rtc_device *rtc = i2c_get_clientdata(client);
139
140 dev_dbg(&client->dev, "%s\n", __FUNCTION__);
141
142 if (rtc)
143 rtc_device_unregister(rtc);
144
145 if ((err = i2c_detach_client(client)))
146 return err;
147
148 kfree(client);
149
150 return 0;
151}
152
153static struct i2c_driver ds1672_driver = {
154 .driver = {
155 .name = "ds1672",
156 },
157 .id = I2C_DRIVERID_DS1672,
158 .attach_adapter = &ds1672_attach,
159 .detach_client = &ds1672_detach,
160};
161
162static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
163{
164 int err = 0;
165 struct i2c_client *client;
166 struct rtc_device *rtc;
167
168 dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
169
170 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
171 err = -ENODEV;
172 goto exit;
173 }
174
175 if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
176 err = -ENOMEM;
177 goto exit;
178 }
179
180 /* I2C client */
181 client->addr = address;
182 client->driver = &ds1672_driver;
183 client->adapter = adapter;
184
185 strlcpy(client->name, ds1672_driver.driver.name, I2C_NAME_SIZE);
186
187 /* Inform the i2c layer */
188 if ((err = i2c_attach_client(client)))
189 goto exit_kfree;
190
191 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
192
193 rtc = rtc_device_register(ds1672_driver.driver.name, &client->dev,
194 &ds1672_rtc_ops, THIS_MODULE);
195
196 if (IS_ERR(rtc)) {
197 err = PTR_ERR(rtc);
198 dev_err(&client->dev,
199 "unable to register the class device\n");
200 goto exit_detach;
201 }
202
203 i2c_set_clientdata(client, rtc);
204
205 return 0;
206
207exit_detach:
208 i2c_detach_client(client);
209
210exit_kfree:
211 kfree(client);
212
213exit:
214 return err;
215}
216
217static int __init ds1672_init(void)
218{
219 return i2c_add_driver(&ds1672_driver);
220}
221
222static void __exit ds1672_exit(void)
223{
224 i2c_del_driver(&ds1672_driver);
225}
226
227MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
228MODULE_DESCRIPTION("Dallas/Maxim DS1672 timekeeper driver");
229MODULE_LICENSE("GPL");
230MODULE_VERSION(DRV_VERSION);
231
232module_init(ds1672_init);
233module_exit(ds1672_exit);
diff --git a/drivers/rtc/rtc-ep93xx.c b/drivers/rtc/rtc-ep93xx.c
new file mode 100644
index 000000000000..0dd80ea686a9
--- /dev/null
+++ b/drivers/rtc/rtc-ep93xx.c
@@ -0,0 +1,162 @@
1/*
2 * A driver for the RTC embedded in the Cirrus Logic EP93XX processors
3 * Copyright (c) 2006 Tower Technologies
4 *
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/module.h>
13#include <linux/rtc.h>
14#include <linux/platform_device.h>
15#include <asm/hardware.h>
16
17#define EP93XX_RTC_REG(x) (EP93XX_RTC_BASE + (x))
18#define EP93XX_RTC_DATA EP93XX_RTC_REG(0x0000)
19#define EP93XX_RTC_LOAD EP93XX_RTC_REG(0x000C)
20#define EP93XX_RTC_SWCOMP EP93XX_RTC_REG(0x0108)
21
22#define DRV_VERSION "0.2"
23
24static int ep93xx_get_swcomp(struct device *dev, unsigned short *preload,
25 unsigned short *delete)
26{
27 unsigned short comp = __raw_readl(EP93XX_RTC_SWCOMP);
28
29 if (preload)
30 *preload = comp & 0xffff;
31
32 if (delete)
33 *delete = (comp >> 16) & 0x1f;
34
35 return 0;
36}
37
38static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm)
39{
40 unsigned long time = __raw_readl(EP93XX_RTC_DATA);
41
42 rtc_time_to_tm(time, tm);
43 return 0;
44}
45
46static int ep93xx_rtc_set_mmss(struct device *dev, unsigned long secs)
47{
48 __raw_writel(secs + 1, EP93XX_RTC_LOAD);
49 return 0;
50}
51
52static int ep93xx_rtc_set_time(struct device *dev, struct rtc_time *tm)
53{
54 int err;
55 unsigned long secs;
56
57 err = rtc_tm_to_time(tm, &secs);
58 if (err != 0)
59 return err;
60
61 return ep93xx_rtc_set_mmss(dev, secs);
62}
63
64static int ep93xx_rtc_proc(struct device *dev, struct seq_file *seq)
65{
66 unsigned short preload, delete;
67
68 ep93xx_get_swcomp(dev, &preload, &delete);
69
70 seq_printf(seq, "24hr\t\t: yes\n");
71 seq_printf(seq, "preload\t\t: %d\n", preload);
72 seq_printf(seq, "delete\t\t: %d\n", delete);
73
74 return 0;
75}
76
77static struct rtc_class_ops ep93xx_rtc_ops = {
78 .read_time = ep93xx_rtc_read_time,
79 .set_time = ep93xx_rtc_set_time,
80 .set_mmss = ep93xx_rtc_set_mmss,
81 .proc = ep93xx_rtc_proc,
82};
83
84static ssize_t ep93xx_sysfs_show_comp_preload(struct device *dev,
85 struct device_attribute *attr, char *buf)
86{
87 unsigned short preload;
88
89 ep93xx_get_swcomp(dev, &preload, NULL);
90
91 return sprintf(buf, "%d\n", preload);
92}
93static DEVICE_ATTR(comp_preload, S_IRUGO, ep93xx_sysfs_show_comp_preload, NULL);
94
95static ssize_t ep93xx_sysfs_show_comp_delete(struct device *dev,
96 struct device_attribute *attr, char *buf)
97{
98 unsigned short delete;
99
100 ep93xx_get_swcomp(dev, NULL, &delete);
101
102 return sprintf(buf, "%d\n", delete);
103}
104static DEVICE_ATTR(comp_delete, S_IRUGO, ep93xx_sysfs_show_comp_delete, NULL);
105
106
107static int __devinit ep93xx_rtc_probe(struct platform_device *dev)
108{
109 struct rtc_device *rtc = rtc_device_register("ep93xx",
110 &dev->dev, &ep93xx_rtc_ops, THIS_MODULE);
111
112 if (IS_ERR(rtc)) {
113 dev_err(&dev->dev, "unable to register\n");
114 return PTR_ERR(rtc);
115 }
116
117 platform_set_drvdata(dev, rtc);
118
119 device_create_file(&dev->dev, &dev_attr_comp_preload);
120 device_create_file(&dev->dev, &dev_attr_comp_delete);
121
122 return 0;
123}
124
125static int __devexit ep93xx_rtc_remove(struct platform_device *dev)
126{
127 struct rtc_device *rtc = platform_get_drvdata(dev);
128
129 if (rtc)
130 rtc_device_unregister(rtc);
131
132 platform_set_drvdata(dev, NULL);
133
134 return 0;
135}
136
137static struct platform_driver ep93xx_rtc_platform_driver = {
138 .driver = {
139 .name = "ep93xx-rtc",
140 .owner = THIS_MODULE,
141 },
142 .probe = ep93xx_rtc_probe,
143 .remove = __devexit_p(ep93xx_rtc_remove),
144};
145
146static int __init ep93xx_rtc_init(void)
147{
148 return platform_driver_register(&ep93xx_rtc_platform_driver);
149}
150
151static void __exit ep93xx_rtc_exit(void)
152{
153 platform_driver_unregister(&ep93xx_rtc_platform_driver);
154}
155
156MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
157MODULE_DESCRIPTION("EP93XX RTC driver");
158MODULE_LICENSE("GPL");
159MODULE_VERSION(DRV_VERSION);
160
161module_init(ep93xx_rtc_init);
162module_exit(ep93xx_rtc_exit);
diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c
new file mode 100644
index 000000000000..cfedc1d28ee1
--- /dev/null
+++ b/drivers/rtc/rtc-lib.c
@@ -0,0 +1,101 @@
1/*
2 * rtc and date/time utility functions
3 *
4 * Copyright (C) 2005-06 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * based on arch/arm/common/rtctime.c and other bits
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/module.h>
15#include <linux/rtc.h>
16
17static const unsigned char rtc_days_in_month[] = {
18 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
19};
20
21#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
22#define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year % 400))
23
24int rtc_month_days(unsigned int month, unsigned int year)
25{
26 return rtc_days_in_month[month] + (LEAP_YEAR(year) && month == 1);
27}
28EXPORT_SYMBOL(rtc_month_days);
29
30/*
31 * Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
32 */
33void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
34{
35 register int days, month, year;
36
37 days = time / 86400;
38 time -= days * 86400;
39
40 /* day of the week, 1970-01-01 was a Thursday */
41 tm->tm_wday = (days + 4) % 7;
42
43 year = 1970 + days / 365;
44 days -= (year - 1970) * 365
45 + LEAPS_THRU_END_OF(year - 1)
46 - LEAPS_THRU_END_OF(1970 - 1);
47 if (days < 0) {
48 year -= 1;
49 days += 365 + LEAP_YEAR(year);
50 }
51 tm->tm_year = year - 1900;
52 tm->tm_yday = days + 1;
53
54 for (month = 0; month < 11; month++) {
55 int newdays;
56
57 newdays = days - rtc_month_days(month, year);
58 if (newdays < 0)
59 break;
60 days = newdays;
61 }
62 tm->tm_mon = month;
63 tm->tm_mday = days + 1;
64
65 tm->tm_hour = time / 3600;
66 time -= tm->tm_hour * 3600;
67 tm->tm_min = time / 60;
68 tm->tm_sec = time - tm->tm_min * 60;
69}
70EXPORT_SYMBOL(rtc_time_to_tm);
71
72/*
73 * Does the rtc_time represent a valid date/time?
74 */
75int rtc_valid_tm(struct rtc_time *tm)
76{
77 if (tm->tm_year < 70
78 || tm->tm_mon >= 12
79 || tm->tm_mday < 1
80 || tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + 1900)
81 || tm->tm_hour >= 24
82 || tm->tm_min >= 60
83 || tm->tm_sec >= 60)
84 return -EINVAL;
85
86 return 0;
87}
88EXPORT_SYMBOL(rtc_valid_tm);
89
90/*
91 * Convert Gregorian date to seconds since 01-01-1970 00:00:00.
92 */
93int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
94{
95 *time = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
96 tm->tm_hour, tm->tm_min, tm->tm_sec);
97 return 0;
98}
99EXPORT_SYMBOL(rtc_tm_to_time);
100
101MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c
new file mode 100644
index 000000000000..db445c872b1b
--- /dev/null
+++ b/drivers/rtc/rtc-m48t86.c
@@ -0,0 +1,209 @@
1/*
2 * ST M48T86 / Dallas DS12887 RTC driver
3 * Copyright (c) 2006 Tower Technologies
4 *
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This drivers only supports the clock running in BCD and 24H mode.
12 * If it will be ever adapted to binary and 12H mode, care must be taken
13 * to not introduce bugs.
14 */
15
16#include <linux/module.h>
17#include <linux/rtc.h>
18#include <linux/platform_device.h>
19#include <linux/m48t86.h>
20#include <linux/bcd.h>
21
22#define M48T86_REG_SEC 0x00
23#define M48T86_REG_SECALRM 0x01
24#define M48T86_REG_MIN 0x02
25#define M48T86_REG_MINALRM 0x03
26#define M48T86_REG_HOUR 0x04
27#define M48T86_REG_HOURALRM 0x05
28#define M48T86_REG_DOW 0x06 /* 1 = sunday */
29#define M48T86_REG_DOM 0x07
30#define M48T86_REG_MONTH 0x08 /* 1 - 12 */
31#define M48T86_REG_YEAR 0x09 /* 0 - 99 */
32#define M48T86_REG_A 0x0A
33#define M48T86_REG_B 0x0B
34#define M48T86_REG_C 0x0C
35#define M48T86_REG_D 0x0D
36
37#define M48T86_REG_B_H24 (1 << 1)
38#define M48T86_REG_B_DM (1 << 2)
39#define M48T86_REG_B_SET (1 << 7)
40#define M48T86_REG_D_VRT (1 << 7)
41
42#define DRV_VERSION "0.1"
43
44
45static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm)
46{
47 unsigned char reg;
48 struct platform_device *pdev = to_platform_device(dev);
49 struct m48t86_ops *ops = pdev->dev.platform_data;
50
51 reg = ops->readb(M48T86_REG_B);
52
53 if (reg & M48T86_REG_B_DM) {
54 /* data (binary) mode */
55 tm->tm_sec = ops->readb(M48T86_REG_SEC);
56 tm->tm_min = ops->readb(M48T86_REG_MIN);
57 tm->tm_hour = ops->readb(M48T86_REG_HOUR) & 0x3F;
58 tm->tm_mday = ops->readb(M48T86_REG_DOM);
59 /* tm_mon is 0-11 */
60 tm->tm_mon = ops->readb(M48T86_REG_MONTH) - 1;
61 tm->tm_year = ops->readb(M48T86_REG_YEAR) + 100;
62 tm->tm_wday = ops->readb(M48T86_REG_DOW);
63 } else {
64 /* bcd mode */
65 tm->tm_sec = BCD2BIN(ops->readb(M48T86_REG_SEC));
66 tm->tm_min = BCD2BIN(ops->readb(M48T86_REG_MIN));
67 tm->tm_hour = BCD2BIN(ops->readb(M48T86_REG_HOUR) & 0x3F);
68 tm->tm_mday = BCD2BIN(ops->readb(M48T86_REG_DOM));
69 /* tm_mon is 0-11 */
70 tm->tm_mon = BCD2BIN(ops->readb(M48T86_REG_MONTH)) - 1;
71 tm->tm_year = BCD2BIN(ops->readb(M48T86_REG_YEAR)) + 100;
72 tm->tm_wday = BCD2BIN(ops->readb(M48T86_REG_DOW));
73 }
74
75 /* correct the hour if the clock is in 12h mode */
76 if (!(reg & M48T86_REG_B_H24))
77 if (ops->readb(M48T86_REG_HOUR) & 0x80)
78 tm->tm_hour += 12;
79
80 return 0;
81}
82
83static int m48t86_rtc_set_time(struct device *dev, struct rtc_time *tm)
84{
85 unsigned char reg;
86 struct platform_device *pdev = to_platform_device(dev);
87 struct m48t86_ops *ops = pdev->dev.platform_data;
88
89 reg = ops->readb(M48T86_REG_B);
90
91 /* update flag and 24h mode */
92 reg |= M48T86_REG_B_SET | M48T86_REG_B_H24;
93 ops->writeb(reg, M48T86_REG_B);
94
95 if (reg & M48T86_REG_B_DM) {
96 /* data (binary) mode */
97 ops->writeb(tm->tm_sec, M48T86_REG_SEC);
98 ops->writeb(tm->tm_min, M48T86_REG_MIN);
99 ops->writeb(tm->tm_hour, M48T86_REG_HOUR);
100 ops->writeb(tm->tm_mday, M48T86_REG_DOM);
101 ops->writeb(tm->tm_mon + 1, M48T86_REG_MONTH);
102 ops->writeb(tm->tm_year % 100, M48T86_REG_YEAR);
103 ops->writeb(tm->tm_wday, M48T86_REG_DOW);
104 } else {
105 /* bcd mode */
106 ops->writeb(BIN2BCD(tm->tm_sec), M48T86_REG_SEC);
107 ops->writeb(BIN2BCD(tm->tm_min), M48T86_REG_MIN);
108 ops->writeb(BIN2BCD(tm->tm_hour), M48T86_REG_HOUR);
109 ops->writeb(BIN2BCD(tm->tm_mday), M48T86_REG_DOM);
110 ops->writeb(BIN2BCD(tm->tm_mon + 1), M48T86_REG_MONTH);
111 ops->writeb(BIN2BCD(tm->tm_year % 100), M48T86_REG_YEAR);
112 ops->writeb(BIN2BCD(tm->tm_wday), M48T86_REG_DOW);
113 }
114
115 /* update ended */
116 reg &= ~M48T86_REG_B_SET;
117 ops->writeb(reg, M48T86_REG_B);
118
119 return 0;
120}
121
122static int m48t86_rtc_proc(struct device *dev, struct seq_file *seq)
123{
124 unsigned char reg;
125 struct platform_device *pdev = to_platform_device(dev);
126 struct m48t86_ops *ops = pdev->dev.platform_data;
127
128 reg = ops->readb(M48T86_REG_B);
129
130 seq_printf(seq, "24hr\t\t: %s\n",
131 (reg & M48T86_REG_B_H24) ? "yes" : "no");
132
133 seq_printf(seq, "mode\t\t: %s\n",
134 (reg & M48T86_REG_B_DM) ? "binary" : "bcd");
135
136 reg = ops->readb(M48T86_REG_D);
137
138 seq_printf(seq, "battery\t\t: %s\n",
139 (reg & M48T86_REG_D_VRT) ? "ok" : "exhausted");
140
141 return 0;
142}
143
144static struct rtc_class_ops m48t86_rtc_ops = {
145 .read_time = m48t86_rtc_read_time,
146 .set_time = m48t86_rtc_set_time,
147 .proc = m48t86_rtc_proc,
148};
149
150static int __devinit m48t86_rtc_probe(struct platform_device *dev)
151{
152 unsigned char reg;
153 struct m48t86_ops *ops = dev->dev.platform_data;
154 struct rtc_device *rtc = rtc_device_register("m48t86",
155 &dev->dev, &m48t86_rtc_ops, THIS_MODULE);
156
157 if (IS_ERR(rtc)) {
158 dev_err(&dev->dev, "unable to register\n");
159 return PTR_ERR(rtc);
160 }
161
162 platform_set_drvdata(dev, rtc);
163
164 /* read battery status */
165 reg = ops->readb(M48T86_REG_D);
166 dev_info(&dev->dev, "battery %s\n",
167 (reg & M48T86_REG_D_VRT) ? "ok" : "exhausted");
168
169 return 0;
170}
171
172static int __devexit m48t86_rtc_remove(struct platform_device *dev)
173{
174 struct rtc_device *rtc = platform_get_drvdata(dev);
175
176 if (rtc)
177 rtc_device_unregister(rtc);
178
179 platform_set_drvdata(dev, NULL);
180
181 return 0;
182}
183
184static struct platform_driver m48t86_rtc_platform_driver = {
185 .driver = {
186 .name = "rtc-m48t86",
187 .owner = THIS_MODULE,
188 },
189 .probe = m48t86_rtc_probe,
190 .remove = __devexit_p(m48t86_rtc_remove),
191};
192
193static int __init m48t86_rtc_init(void)
194{
195 return platform_driver_register(&m48t86_rtc_platform_driver);
196}
197
198static void __exit m48t86_rtc_exit(void)
199{
200 platform_driver_unregister(&m48t86_rtc_platform_driver);
201}
202
203MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
204MODULE_DESCRIPTION("M48T86 RTC driver");
205MODULE_LICENSE("GPL");
206MODULE_VERSION(DRV_VERSION);
207
208module_init(m48t86_rtc_init);
209module_exit(m48t86_rtc_exit);
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
new file mode 100644
index 000000000000..d857d45bdbe8
--- /dev/null
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -0,0 +1,353 @@
1/*
2 * An I2C driver for the Philips PCF8563 RTC
3 * Copyright 2005-06 Tower Technologies
4 *
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 * Maintainers: http://www.nslu2-linux.org/
7 *
8 * based on the other drivers in this same directory.
9 *
10 * http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17#include <linux/i2c.h>
18#include <linux/bcd.h>
19#include <linux/rtc.h>
20
21#define DRV_VERSION "0.4.2"
22
23/* Addresses to scan: none
24 * This chip cannot be reliably autodetected. An empty eeprom
25 * located at 0x51 will pass the validation routine due to
26 * the way the registers are implemented.
27 */
28static unsigned short normal_i2c[] = { I2C_CLIENT_END };
29
30/* Module parameters */
31I2C_CLIENT_INSMOD;
32
33#define PCF8563_REG_ST1 0x00 /* status */
34#define PCF8563_REG_ST2 0x01
35
36#define PCF8563_REG_SC 0x02 /* datetime */
37#define PCF8563_REG_MN 0x03
38#define PCF8563_REG_HR 0x04
39#define PCF8563_REG_DM 0x05
40#define PCF8563_REG_DW 0x06
41#define PCF8563_REG_MO 0x07
42#define PCF8563_REG_YR 0x08
43
44#define PCF8563_REG_AMN 0x09 /* alarm */
45#define PCF8563_REG_AHR 0x0A
46#define PCF8563_REG_ADM 0x0B
47#define PCF8563_REG_ADW 0x0C
48
49#define PCF8563_REG_CLKO 0x0D /* clock out */
50#define PCF8563_REG_TMRC 0x0E /* timer control */
51#define PCF8563_REG_TMR 0x0F /* timer */
52
53#define PCF8563_SC_LV 0x80 /* low voltage */
54#define PCF8563_MO_C 0x80 /* century */
55
56static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind);
57static int pcf8563_detach(struct i2c_client *client);
58
59/*
60 * In the routines that deal directly with the pcf8563 hardware, we use
61 * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
62 */
63static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
64{
65 unsigned char buf[13] = { PCF8563_REG_ST1 };
66
67 struct i2c_msg msgs[] = {
68 { client->addr, 0, 1, buf }, /* setup read ptr */
69 { client->addr, I2C_M_RD, 13, buf }, /* read status + date */
70 };
71
72 /* read registers */
73 if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
74 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
75 return -EIO;
76 }
77
78 if (buf[PCF8563_REG_SC] & PCF8563_SC_LV)
79 dev_info(&client->dev,
80 "low voltage detected, date/time is not reliable.\n");
81
82 dev_dbg(&client->dev,
83 "%s: raw data is st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, "
84 "mday=%02x, wday=%02x, mon=%02x, year=%02x\n",
85 __FUNCTION__,
86 buf[0], buf[1], buf[2], buf[3],
87 buf[4], buf[5], buf[6], buf[7],
88 buf[8]);
89
90
91 tm->tm_sec = BCD2BIN(buf[PCF8563_REG_SC] & 0x7F);
92 tm->tm_min = BCD2BIN(buf[PCF8563_REG_MN] & 0x7F);
93 tm->tm_hour = BCD2BIN(buf[PCF8563_REG_HR] & 0x3F); /* rtc hr 0-23 */
94 tm->tm_mday = BCD2BIN(buf[PCF8563_REG_DM] & 0x3F);
95 tm->tm_wday = buf[PCF8563_REG_DW] & 0x07;
96 tm->tm_mon = BCD2BIN(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
97 tm->tm_year = BCD2BIN(buf[PCF8563_REG_YR])
98 + (buf[PCF8563_REG_MO] & PCF8563_MO_C ? 100 : 0);
99
100 dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
101 "mday=%d, mon=%d, year=%d, wday=%d\n",
102 __FUNCTION__,
103 tm->tm_sec, tm->tm_min, tm->tm_hour,
104 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
105
106 /* the clock can give out invalid datetime, but we cannot return
107 * -EINVAL otherwise hwclock will refuse to set the time on bootup.
108 */
109 if (rtc_valid_tm(tm) < 0)
110 dev_err(&client->dev, "retrieved date/time is not valid.\n");
111
112 return 0;
113}
114
115static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm)
116{
117 int i, err;
118 unsigned char buf[9];
119
120 dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
121 "mday=%d, mon=%d, year=%d, wday=%d\n",
122 __FUNCTION__,
123 tm->tm_sec, tm->tm_min, tm->tm_hour,
124 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
125
126 /* hours, minutes and seconds */
127 buf[PCF8563_REG_SC] = BIN2BCD(tm->tm_sec);
128 buf[PCF8563_REG_MN] = BIN2BCD(tm->tm_min);
129 buf[PCF8563_REG_HR] = BIN2BCD(tm->tm_hour);
130
131 buf[PCF8563_REG_DM] = BIN2BCD(tm->tm_mday);
132
133 /* month, 1 - 12 */
134 buf[PCF8563_REG_MO] = BIN2BCD(tm->tm_mon + 1);
135
136 /* year and century */
137 buf[PCF8563_REG_YR] = BIN2BCD(tm->tm_year % 100);
138 if (tm->tm_year / 100)
139 buf[PCF8563_REG_MO] |= PCF8563_MO_C;
140
141 buf[PCF8563_REG_DW] = tm->tm_wday & 0x07;
142
143 /* write register's data */
144 for (i = 0; i < 7; i++) {
145 unsigned char data[2] = { PCF8563_REG_SC + i,
146 buf[PCF8563_REG_SC + i] };
147
148 err = i2c_master_send(client, data, sizeof(data));
149 if (err != sizeof(data)) {
150 dev_err(&client->dev,
151 "%s: err=%d addr=%02x, data=%02x\n",
152 __FUNCTION__, err, data[0], data[1]);
153 return -EIO;
154 }
155 };
156
157 return 0;
158}
159
160struct pcf8563_limit
161{
162 unsigned char reg;
163 unsigned char mask;
164 unsigned char min;
165 unsigned char max;
166};
167
168static int pcf8563_validate_client(struct i2c_client *client)
169{
170 int i;
171
172 static const struct pcf8563_limit pattern[] = {
173 /* register, mask, min, max */
174 { PCF8563_REG_SC, 0x7F, 0, 59 },
175 { PCF8563_REG_MN, 0x7F, 0, 59 },
176 { PCF8563_REG_HR, 0x3F, 0, 23 },
177 { PCF8563_REG_DM, 0x3F, 0, 31 },
178 { PCF8563_REG_MO, 0x1F, 0, 12 },
179 };
180
181 /* check limits (only registers with bcd values) */
182 for (i = 0; i < ARRAY_SIZE(pattern); i++) {
183 int xfer;
184 unsigned char value;
185 unsigned char buf = pattern[i].reg;
186
187 struct i2c_msg msgs[] = {
188 { client->addr, 0, 1, &buf },
189 { client->addr, I2C_M_RD, 1, &buf },
190 };
191
192 xfer = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
193
194 if (xfer != ARRAY_SIZE(msgs)) {
195 dev_err(&client->adapter->dev,
196 "%s: could not read register 0x%02X\n",
197 __FUNCTION__, pattern[i].reg);
198
199 return -EIO;
200 }
201
202 value = BCD2BIN(buf & pattern[i].mask);
203
204 if (value > pattern[i].max ||
205 value < pattern[i].min) {
206 dev_dbg(&client->adapter->dev,
207 "%s: pattern=%d, reg=%x, mask=0x%02x, min=%d, "
208 "max=%d, value=%d, raw=0x%02X\n",
209 __FUNCTION__, i, pattern[i].reg, pattern[i].mask,
210 pattern[i].min, pattern[i].max,
211 value, buf);
212
213 return -ENODEV;
214 }
215 }
216
217 return 0;
218}
219
220static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
221{
222 return pcf8563_get_datetime(to_i2c_client(dev), tm);
223}
224
225static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
226{
227 return pcf8563_set_datetime(to_i2c_client(dev), tm);
228}
229
230static int pcf8563_rtc_proc(struct device *dev, struct seq_file *seq)
231{
232 seq_printf(seq, "24hr\t\t: yes\n");
233 return 0;
234}
235
236static struct rtc_class_ops pcf8563_rtc_ops = {
237 .proc = pcf8563_rtc_proc,
238 .read_time = pcf8563_rtc_read_time,
239 .set_time = pcf8563_rtc_set_time,
240};
241
242static int pcf8563_attach(struct i2c_adapter *adapter)
243{
244 return i2c_probe(adapter, &addr_data, pcf8563_probe);
245}
246
247static struct i2c_driver pcf8563_driver = {
248 .driver = {
249 .name = "pcf8563",
250 },
251 .id = I2C_DRIVERID_PCF8563,
252 .attach_adapter = &pcf8563_attach,
253 .detach_client = &pcf8563_detach,
254};
255
256static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
257{
258 struct i2c_client *client;
259 struct rtc_device *rtc;
260
261 int err = 0;
262
263 dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
264
265 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
266 err = -ENODEV;
267 goto exit;
268 }
269
270 if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
271 err = -ENOMEM;
272 goto exit;
273 }
274
275 client->addr = address;
276 client->driver = &pcf8563_driver;
277 client->adapter = adapter;
278
279 strlcpy(client->name, pcf8563_driver.driver.name, I2C_NAME_SIZE);
280
281 /* Verify the chip is really an PCF8563 */
282 if (kind < 0) {
283 if (pcf8563_validate_client(client) < 0) {
284 err = -ENODEV;
285 goto exit_kfree;
286 }
287 }
288
289 /* Inform the i2c layer */
290 if ((err = i2c_attach_client(client)))
291 goto exit_kfree;
292
293 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
294
295 rtc = rtc_device_register(pcf8563_driver.driver.name, &client->dev,
296 &pcf8563_rtc_ops, THIS_MODULE);
297
298 if (IS_ERR(rtc)) {
299 err = PTR_ERR(rtc);
300 dev_err(&client->dev,
301 "unable to register the class device\n");
302 goto exit_detach;
303 }
304
305 i2c_set_clientdata(client, rtc);
306
307 return 0;
308
309exit_detach:
310 i2c_detach_client(client);
311
312exit_kfree:
313 kfree(client);
314
315exit:
316 return err;
317}
318
319static int pcf8563_detach(struct i2c_client *client)
320{
321 int err;
322 struct rtc_device *rtc = i2c_get_clientdata(client);
323
324 dev_dbg(&client->dev, "%s\n", __FUNCTION__);
325
326 if (rtc)
327 rtc_device_unregister(rtc);
328
329 if ((err = i2c_detach_client(client)))
330 return err;
331
332 kfree(client);
333
334 return 0;
335}
336
337static int __init pcf8563_init(void)
338{
339 return i2c_add_driver(&pcf8563_driver);
340}
341
342static void __exit pcf8563_exit(void)
343{
344 i2c_del_driver(&pcf8563_driver);
345}
346
347MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
348MODULE_DESCRIPTION("Philips PCF8563/Epson RTC8564 RTC driver");
349MODULE_LICENSE("GPL");
350MODULE_VERSION(DRV_VERSION);
351
352module_init(pcf8563_init);
353module_exit(pcf8563_exit);
diff --git a/drivers/rtc/rtc-proc.c b/drivers/rtc/rtc-proc.c
new file mode 100644
index 000000000000..90b8a97a0919
--- /dev/null
+++ b/drivers/rtc/rtc-proc.c
@@ -0,0 +1,162 @@
1/*
2 * RTC subsystem, proc interface
3 *
4 * Copyright (C) 2005-06 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * based on arch/arm/common/rtctime.c
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/module.h>
15#include <linux/rtc.h>
16#include <linux/proc_fs.h>
17#include <linux/seq_file.h>
18
19static struct class_device *rtc_dev = NULL;
20static DEFINE_MUTEX(rtc_lock);
21
22static int rtc_proc_show(struct seq_file *seq, void *offset)
23{
24 int err;
25 struct class_device *class_dev = seq->private;
26 struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops;
27 struct rtc_wkalrm alrm;
28 struct rtc_time tm;
29
30 err = rtc_read_time(class_dev, &tm);
31 if (err == 0) {
32 seq_printf(seq,
33 "rtc_time\t: %02d:%02d:%02d\n"
34 "rtc_date\t: %04d-%02d-%02d\n",
35 tm.tm_hour, tm.tm_min, tm.tm_sec,
36 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
37 }
38
39 err = rtc_read_alarm(class_dev, &alrm);
40 if (err == 0) {
41 seq_printf(seq, "alrm_time\t: ");
42 if ((unsigned int)alrm.time.tm_hour <= 24)
43 seq_printf(seq, "%02d:", alrm.time.tm_hour);
44 else
45 seq_printf(seq, "**:");
46 if ((unsigned int)alrm.time.tm_min <= 59)
47 seq_printf(seq, "%02d:", alrm.time.tm_min);
48 else
49 seq_printf(seq, "**:");
50 if ((unsigned int)alrm.time.tm_sec <= 59)
51 seq_printf(seq, "%02d\n", alrm.time.tm_sec);
52 else
53 seq_printf(seq, "**\n");
54
55 seq_printf(seq, "alrm_date\t: ");
56 if ((unsigned int)alrm.time.tm_year <= 200)
57 seq_printf(seq, "%04d-", alrm.time.tm_year + 1900);
58 else
59 seq_printf(seq, "****-");
60 if ((unsigned int)alrm.time.tm_mon <= 11)
61 seq_printf(seq, "%02d-", alrm.time.tm_mon + 1);
62 else
63 seq_printf(seq, "**-");
64 if ((unsigned int)alrm.time.tm_mday <= 31)
65 seq_printf(seq, "%02d\n", alrm.time.tm_mday);
66 else
67 seq_printf(seq, "**\n");
68 seq_printf(seq, "alrm_wakeup\t: %s\n",
69 alrm.enabled ? "yes" : "no");
70 seq_printf(seq, "alrm_pending\t: %s\n",
71 alrm.pending ? "yes" : "no");
72 }
73
74 if (ops->proc)
75 ops->proc(class_dev->dev, seq);
76
77 return 0;
78}
79
80static int rtc_proc_open(struct inode *inode, struct file *file)
81{
82 struct class_device *class_dev = PDE(inode)->data;
83
84 if (!try_module_get(THIS_MODULE))
85 return -ENODEV;
86
87 return single_open(file, rtc_proc_show, class_dev);
88}
89
90static int rtc_proc_release(struct inode *inode, struct file *file)
91{
92 int res = single_release(inode, file);
93 module_put(THIS_MODULE);
94 return res;
95}
96
97static struct file_operations rtc_proc_fops = {
98 .open = rtc_proc_open,
99 .read = seq_read,
100 .llseek = seq_lseek,
101 .release = rtc_proc_release,
102};
103
104static int rtc_proc_add_device(struct class_device *class_dev,
105 struct class_interface *class_intf)
106{
107 mutex_lock(&rtc_lock);
108 if (rtc_dev == NULL) {
109 struct proc_dir_entry *ent;
110
111 rtc_dev = class_dev;
112
113 ent = create_proc_entry("driver/rtc", 0, NULL);
114 if (ent) {
115 struct rtc_device *rtc = to_rtc_device(class_dev);
116
117 ent->proc_fops = &rtc_proc_fops;
118 ent->owner = rtc->owner;
119 ent->data = class_dev;
120
121 dev_info(class_dev->dev, "rtc intf: proc\n");
122 }
123 else
124 rtc_dev = NULL;
125 }
126 mutex_unlock(&rtc_lock);
127
128 return 0;
129}
130
131static void rtc_proc_remove_device(struct class_device *class_dev,
132 struct class_interface *class_intf)
133{
134 mutex_lock(&rtc_lock);
135 if (rtc_dev == class_dev) {
136 remove_proc_entry("driver/rtc", NULL);
137 rtc_dev = NULL;
138 }
139 mutex_unlock(&rtc_lock);
140}
141
142static struct class_interface rtc_proc_interface = {
143 .add = &rtc_proc_add_device,
144 .remove = &rtc_proc_remove_device,
145};
146
147static int __init rtc_proc_init(void)
148{
149 return rtc_interface_register(&rtc_proc_interface);
150}
151
152static void __exit rtc_proc_exit(void)
153{
154 class_interface_unregister(&rtc_proc_interface);
155}
156
157module_init(rtc_proc_init);
158module_exit(rtc_proc_exit);
159
160MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
161MODULE_DESCRIPTION("RTC class proc interface");
162MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c
new file mode 100644
index 000000000000..396c8681f66c
--- /dev/null
+++ b/drivers/rtc/rtc-rs5c372.c
@@ -0,0 +1,294 @@
1/*
2 * An I2C driver for the Ricoh RS5C372 RTC
3 *
4 * Copyright (C) 2005 Pavel Mironchik <pmironchik@optifacio.net>
5 * Copyright (C) 2006 Tower Technologies
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/i2c.h>
13#include <linux/rtc.h>
14#include <linux/bcd.h>
15
16#define DRV_VERSION "0.2"
17
18/* Addresses to scan */
19static unsigned short normal_i2c[] = { /* 0x32,*/ I2C_CLIENT_END };
20
21/* Insmod parameters */
22I2C_CLIENT_INSMOD;
23
24#define RS5C372_REG_SECS 0
25#define RS5C372_REG_MINS 1
26#define RS5C372_REG_HOURS 2
27#define RS5C372_REG_WDAY 3
28#define RS5C372_REG_DAY 4
29#define RS5C372_REG_MONTH 5
30#define RS5C372_REG_YEAR 6
31#define RS5C372_REG_TRIM 7
32
33#define RS5C372_TRIM_XSL 0x80
34#define RS5C372_TRIM_MASK 0x7F
35
36#define RS5C372_REG_BASE 0
37
38static int rs5c372_attach(struct i2c_adapter *adapter);
39static int rs5c372_detach(struct i2c_client *client);
40static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind);
41
42static struct i2c_driver rs5c372_driver = {
43 .driver = {
44 .name = "rs5c372",
45 },
46 .attach_adapter = &rs5c372_attach,
47 .detach_client = &rs5c372_detach,
48};
49
50static int rs5c372_get_datetime(struct i2c_client *client, struct rtc_time *tm)
51{
52 unsigned char buf[7] = { RS5C372_REG_BASE };
53
54 /* this implements the 1st reading method, according
55 * to the datasheet. buf[0] is initialized with
56 * address ptr and transmission format register.
57 */
58 struct i2c_msg msgs[] = {
59 { client->addr, 0, 1, buf },
60 { client->addr, I2C_M_RD, 7, buf },
61 };
62
63 if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
64 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
65 return -EIO;
66 }
67
68 tm->tm_sec = BCD2BIN(buf[RS5C372_REG_SECS] & 0x7f);
69 tm->tm_min = BCD2BIN(buf[RS5C372_REG_MINS] & 0x7f);
70 tm->tm_hour = BCD2BIN(buf[RS5C372_REG_HOURS] & 0x3f);
71 tm->tm_wday = BCD2BIN(buf[RS5C372_REG_WDAY] & 0x07);
72 tm->tm_mday = BCD2BIN(buf[RS5C372_REG_DAY] & 0x3f);
73
74 /* tm->tm_mon is zero-based */
75 tm->tm_mon = BCD2BIN(buf[RS5C372_REG_MONTH] & 0x1f) - 1;
76
77 /* year is 1900 + tm->tm_year */
78 tm->tm_year = BCD2BIN(buf[RS5C372_REG_YEAR]) + 100;
79
80 dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
81 "mday=%d, mon=%d, year=%d, wday=%d\n",
82 __FUNCTION__,
83 tm->tm_sec, tm->tm_min, tm->tm_hour,
84 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
85
86 return 0;
87}
88
89static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm)
90{
91 unsigned char buf[8] = { RS5C372_REG_BASE };
92
93 dev_dbg(&client->dev,
94 "%s: secs=%d, mins=%d, hours=%d ",
95 "mday=%d, mon=%d, year=%d, wday=%d\n",
96 __FUNCTION__, tm->tm_sec, tm->tm_min, tm->tm_hour,
97 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
98
99 buf[1] = BIN2BCD(tm->tm_sec);
100 buf[2] = BIN2BCD(tm->tm_min);
101 buf[3] = BIN2BCD(tm->tm_hour);
102 buf[4] = BIN2BCD(tm->tm_wday);
103 buf[5] = BIN2BCD(tm->tm_mday);
104 buf[6] = BIN2BCD(tm->tm_mon + 1);
105 buf[7] = BIN2BCD(tm->tm_year - 100);
106
107 if ((i2c_master_send(client, buf, 8)) != 8) {
108 dev_err(&client->dev, "%s: write error\n", __FUNCTION__);
109 return -EIO;
110 }
111
112 return 0;
113}
114
115static int rs5c372_get_trim(struct i2c_client *client, int *osc, int *trim)
116{
117 unsigned char buf = RS5C372_REG_TRIM;
118
119 struct i2c_msg msgs[] = {
120 { client->addr, 0, 1, &buf },
121 { client->addr, I2C_M_RD, 1, &buf },
122 };
123
124 if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
125 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
126 return -EIO;
127 }
128
129 dev_dbg(&client->dev, "%s: raw trim=%x\n", __FUNCTION__, trim);
130
131 if (osc)
132 *osc = (buf & RS5C372_TRIM_XSL) ? 32000 : 32768;
133
134 if (trim)
135 *trim = buf & RS5C372_TRIM_MASK;
136
137 return 0;
138}
139
140static int rs5c372_rtc_read_time(struct device *dev, struct rtc_time *tm)
141{
142 return rs5c372_get_datetime(to_i2c_client(dev), tm);
143}
144
145static int rs5c372_rtc_set_time(struct device *dev, struct rtc_time *tm)
146{
147 return rs5c372_set_datetime(to_i2c_client(dev), tm);
148}
149
150static int rs5c372_rtc_proc(struct device *dev, struct seq_file *seq)
151{
152 int err, osc, trim;
153
154 seq_printf(seq, "24hr\t\t: yes\n");
155
156 if ((err = rs5c372_get_trim(to_i2c_client(dev), &osc, &trim)) == 0) {
157 seq_printf(seq, "%d.%03d KHz\n", osc / 1000, osc % 1000);
158 seq_printf(seq, "trim\t: %d\n", trim);
159 }
160
161 return 0;
162}
163
164static struct rtc_class_ops rs5c372_rtc_ops = {
165 .proc = rs5c372_rtc_proc,
166 .read_time = rs5c372_rtc_read_time,
167 .set_time = rs5c372_rtc_set_time,
168};
169
170static ssize_t rs5c372_sysfs_show_trim(struct device *dev,
171 struct device_attribute *attr, char *buf)
172{
173 int trim;
174
175 if (rs5c372_get_trim(to_i2c_client(dev), NULL, &trim) == 0)
176 return sprintf(buf, "0x%2x\n", trim);
177
178 return 0;
179}
180static DEVICE_ATTR(trim, S_IRUGO, rs5c372_sysfs_show_trim, NULL);
181
182static ssize_t rs5c372_sysfs_show_osc(struct device *dev,
183 struct device_attribute *attr, char *buf)
184{
185 int osc;
186
187 if (rs5c372_get_trim(to_i2c_client(dev), &osc, NULL) == 0)
188 return sprintf(buf, "%d.%03d KHz\n", osc / 1000, osc % 1000);
189
190 return 0;
191}
192static DEVICE_ATTR(osc, S_IRUGO, rs5c372_sysfs_show_osc, NULL);
193
194static int rs5c372_attach(struct i2c_adapter *adapter)
195{
196 dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
197 return i2c_probe(adapter, &addr_data, rs5c372_probe);
198}
199
200static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
201{
202 int err = 0;
203 struct i2c_client *client;
204 struct rtc_device *rtc;
205
206 dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
207
208 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
209 err = -ENODEV;
210 goto exit;
211 }
212
213 if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
214 err = -ENOMEM;
215 goto exit;
216 }
217
218 /* I2C client */
219 client->addr = address;
220 client->driver = &rs5c372_driver;
221 client->adapter = adapter;
222
223 strlcpy(client->name, rs5c372_driver.driver.name, I2C_NAME_SIZE);
224
225 /* Inform the i2c layer */
226 if ((err = i2c_attach_client(client)))
227 goto exit_kfree;
228
229 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
230
231 rtc = rtc_device_register(rs5c372_driver.driver.name, &client->dev,
232 &rs5c372_rtc_ops, THIS_MODULE);
233
234 if (IS_ERR(rtc)) {
235 err = PTR_ERR(rtc);
236 dev_err(&client->dev,
237 "unable to register the class device\n");
238 goto exit_detach;
239 }
240
241 i2c_set_clientdata(client, rtc);
242
243 device_create_file(&client->dev, &dev_attr_trim);
244 device_create_file(&client->dev, &dev_attr_osc);
245
246 return 0;
247
248exit_detach:
249 i2c_detach_client(client);
250
251exit_kfree:
252 kfree(client);
253
254exit:
255 return err;
256}
257
258static int rs5c372_detach(struct i2c_client *client)
259{
260 int err;
261 struct rtc_device *rtc = i2c_get_clientdata(client);
262
263 dev_dbg(&client->dev, "%s\n", __FUNCTION__);
264
265 if (rtc)
266 rtc_device_unregister(rtc);
267
268 if ((err = i2c_detach_client(client)))
269 return err;
270
271 kfree(client);
272
273 return 0;
274}
275
276static __init int rs5c372_init(void)
277{
278 return i2c_add_driver(&rs5c372_driver);
279}
280
281static __exit void rs5c372_exit(void)
282{
283 i2c_del_driver(&rs5c372_driver);
284}
285
286module_init(rs5c372_init);
287module_exit(rs5c372_exit);
288
289MODULE_AUTHOR(
290 "Pavel Mironchik <pmironchik@optifacio.net>, "
291 "Alessandro Zummo <a.zummo@towertech.it>");
292MODULE_DESCRIPTION("Ricoh RS5C372 RTC driver");
293MODULE_LICENSE("GPL");
294MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
new file mode 100644
index 000000000000..83b2bb480a16
--- /dev/null
+++ b/drivers/rtc/rtc-sa1100.c
@@ -0,0 +1,388 @@
1/*
2 * Real Time Clock interface for StrongARM SA1x00 and XScale PXA2xx
3 *
4 * Copyright (c) 2000 Nils Faerber
5 *
6 * Based on rtc.c by Paul Gortmaker
7 *
8 * Original Driver by Nils Faerber <nils@kernelconcepts.de>
9 *
10 * Modifications from:
11 * CIH <cih@coventive.com>
12 * Nicolas Pitre <nico@cam.org>
13 * Andrew Christian <andrew.christian@hp.com>
14 *
15 * Converted to the RTC subsystem and Driver Model
16 * by Richard Purdie <rpurdie@rpsys.net>
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 */
23
24#include <linux/platform_device.h>
25#include <linux/module.h>
26#include <linux/rtc.h>
27#include <linux/init.h>
28#include <linux/fs.h>
29#include <linux/interrupt.h>
30#include <linux/string.h>
31#include <linux/pm.h>
32
33#include <asm/bitops.h>
34#include <asm/hardware.h>
35#include <asm/irq.h>
36#include <asm/rtc.h>
37
38#ifdef CONFIG_ARCH_PXA
39#include <asm/arch/pxa-regs.h>
40#endif
41
42#define TIMER_FREQ CLOCK_TICK_RATE
43#define RTC_DEF_DIVIDER 32768 - 1
44#define RTC_DEF_TRIM 0
45
46static unsigned long rtc_freq = 1024;
47static struct rtc_time rtc_alarm;
48static spinlock_t sa1100_rtc_lock = SPIN_LOCK_UNLOCKED;
49
50static int rtc_update_alarm(struct rtc_time *alrm)
51{
52 struct rtc_time alarm_tm, now_tm;
53 unsigned long now, time;
54 int ret;
55
56 do {
57 now = RCNR;
58 rtc_time_to_tm(now, &now_tm);
59 rtc_next_alarm_time(&alarm_tm, &now_tm, alrm);
60 ret = rtc_tm_to_time(&alarm_tm, &time);
61 if (ret != 0)
62 break;
63
64 RTSR = RTSR & (RTSR_HZE|RTSR_ALE|RTSR_AL);
65 RTAR = time;
66 } while (now != RCNR);
67
68 return ret;
69}
70
71static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id,
72 struct pt_regs *regs)
73{
74 struct platform_device *pdev = to_platform_device(dev_id);
75 struct rtc_device *rtc = platform_get_drvdata(pdev);
76 unsigned int rtsr;
77 unsigned long events = 0;
78
79 spin_lock(&sa1100_rtc_lock);
80
81 rtsr = RTSR;
82 /* clear interrupt sources */
83 RTSR = 0;
84 RTSR = (RTSR_AL | RTSR_HZ) & (rtsr >> 2);
85
86 /* clear alarm interrupt if it has occurred */
87 if (rtsr & RTSR_AL)
88 rtsr &= ~RTSR_ALE;
89 RTSR = rtsr & (RTSR_ALE | RTSR_HZE);
90
91 /* update irq data & counter */
92 if (rtsr & RTSR_AL)
93 events |= RTC_AF | RTC_IRQF;
94 if (rtsr & RTSR_HZ)
95 events |= RTC_UF | RTC_IRQF;
96
97 rtc_update_irq(&rtc->class_dev, 1, events);
98
99 if (rtsr & RTSR_AL && rtc_periodic_alarm(&rtc_alarm))
100 rtc_update_alarm(&rtc_alarm);
101
102 spin_unlock(&sa1100_rtc_lock);
103
104 return IRQ_HANDLED;
105}
106
107static int rtc_timer1_count;
108
109static irqreturn_t timer1_interrupt(int irq, void *dev_id,
110 struct pt_regs *regs)
111{
112 struct platform_device *pdev = to_platform_device(dev_id);
113 struct rtc_device *rtc = platform_get_drvdata(pdev);
114
115 /*
116 * If we match for the first time, rtc_timer1_count will be 1.
117 * Otherwise, we wrapped around (very unlikely but
118 * still possible) so compute the amount of missed periods.
119 * The match reg is updated only when the data is actually retrieved
120 * to avoid unnecessary interrupts.
121 */
122 OSSR = OSSR_M1; /* clear match on timer1 */
123
124 rtc_update_irq(&rtc->class_dev, rtc_timer1_count, RTC_PF | RTC_IRQF);
125
126 if (rtc_timer1_count == 1)
127 rtc_timer1_count = (rtc_freq * ((1<<30)/(TIMER_FREQ>>2)));
128
129 return IRQ_HANDLED;
130}
131
132static int sa1100_rtc_read_callback(struct device *dev, int data)
133{
134 if (data & RTC_PF) {
135 /* interpolate missed periods and set match for the next */
136 unsigned long period = TIMER_FREQ/rtc_freq;
137 unsigned long oscr = OSCR;
138 unsigned long osmr1 = OSMR1;
139 unsigned long missed = (oscr - osmr1)/period;
140 data += missed << 8;
141 OSSR = OSSR_M1; /* clear match on timer 1 */
142 OSMR1 = osmr1 + (missed + 1)*period;
143 /* Ensure we didn't miss another match in the mean time.
144 * Here we compare (match - OSCR) 8 instead of 0 --
145 * see comment in pxa_timer_interrupt() for explanation.
146 */
147 while( (signed long)((osmr1 = OSMR1) - OSCR) <= 8 ) {
148 data += 0x100;
149 OSSR = OSSR_M1; /* clear match on timer 1 */
150 OSMR1 = osmr1 + period;
151 }
152 }
153 return data;
154}
155
156static int sa1100_rtc_open(struct device *dev)
157{
158 int ret;
159
160 ret = request_irq(IRQ_RTC1Hz, sa1100_rtc_interrupt, SA_INTERRUPT,
161 "rtc 1Hz", dev);
162 if (ret) {
163 printk(KERN_ERR "rtc: IRQ%d already in use.\n", IRQ_RTC1Hz);
164 goto fail_ui;
165 }
166 ret = request_irq(IRQ_RTCAlrm, sa1100_rtc_interrupt, SA_INTERRUPT,
167 "rtc Alrm", dev);
168 if (ret) {
169 printk(KERN_ERR "rtc: IRQ%d already in use.\n", IRQ_RTCAlrm);
170 goto fail_ai;
171 }
172 ret = request_irq(IRQ_OST1, timer1_interrupt, SA_INTERRUPT,
173 "rtc timer", dev);
174 if (ret) {
175 printk(KERN_ERR "rtc: IRQ%d already in use.\n", IRQ_OST1);
176 goto fail_pi;
177 }
178 return 0;
179
180 fail_pi:
181 free_irq(IRQ_RTCAlrm, NULL);
182 fail_ai:
183 free_irq(IRQ_RTC1Hz, NULL);
184 fail_ui:
185 return ret;
186}
187
188static void sa1100_rtc_release(struct device *dev)
189{
190 spin_lock_irq(&sa1100_rtc_lock);
191 RTSR = 0;
192 OIER &= ~OIER_E1;
193 OSSR = OSSR_M1;
194 spin_unlock_irq(&sa1100_rtc_lock);
195
196 free_irq(IRQ_OST1, dev);
197 free_irq(IRQ_RTCAlrm, dev);
198 free_irq(IRQ_RTC1Hz, dev);
199}
200
201
202static int sa1100_rtc_ioctl(struct device *dev, unsigned int cmd,
203 unsigned long arg)
204{
205 switch(cmd) {
206 case RTC_AIE_OFF:
207 spin_lock_irq(&sa1100_rtc_lock);
208 RTSR &= ~RTSR_ALE;
209 spin_unlock_irq(&sa1100_rtc_lock);
210 return 0;
211 case RTC_AIE_ON:
212 spin_lock_irq(&sa1100_rtc_lock);
213 RTSR |= RTSR_ALE;
214 spin_unlock_irq(&sa1100_rtc_lock);
215 return 0;
216 case RTC_UIE_OFF:
217 spin_lock_irq(&sa1100_rtc_lock);
218 RTSR &= ~RTSR_HZE;
219 spin_unlock_irq(&sa1100_rtc_lock);
220 return 0;
221 case RTC_UIE_ON:
222 spin_lock_irq(&sa1100_rtc_lock);
223 RTSR |= RTSR_HZE;
224 spin_unlock_irq(&sa1100_rtc_lock);
225 return 0;
226 case RTC_PIE_OFF:
227 spin_lock_irq(&sa1100_rtc_lock);
228 OIER &= ~OIER_E1;
229 spin_unlock_irq(&sa1100_rtc_lock);
230 return 0;
231 case RTC_PIE_ON:
232 if ((rtc_freq > 64) && !capable(CAP_SYS_RESOURCE))
233 return -EACCES;
234 spin_lock_irq(&sa1100_rtc_lock);
235 OSMR1 = TIMER_FREQ/rtc_freq + OSCR;
236 OIER |= OIER_E1;
237 rtc_timer1_count = 1;
238 spin_unlock_irq(&sa1100_rtc_lock);
239 return 0;
240 case RTC_IRQP_READ:
241 return put_user(rtc_freq, (unsigned long *)arg);
242 case RTC_IRQP_SET:
243 if (arg < 1 || arg > TIMER_FREQ)
244 return -EINVAL;
245 if ((arg > 64) && (!capable(CAP_SYS_RESOURCE)))
246 return -EACCES;
247 rtc_freq = arg;
248 return 0;
249 }
250 return -EINVAL;
251}
252
253static int sa1100_rtc_read_time(struct device *dev, struct rtc_time *tm)
254{
255 rtc_time_to_tm(RCNR, tm);
256 return 0;
257}
258
259static int sa1100_rtc_set_time(struct device *dev, struct rtc_time *tm)
260{
261 unsigned long time;
262 int ret;
263
264 ret = rtc_tm_to_time(tm, &time);
265 if (ret == 0)
266 RCNR = time;
267 return ret;
268}
269
270static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
271{
272 memcpy(&alrm->time, &rtc_alarm, sizeof(struct rtc_time));
273 alrm->pending = RTSR & RTSR_AL ? 1 : 0;
274 return 0;
275}
276
277static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
278{
279 int ret;
280
281 spin_lock_irq(&sa1100_rtc_lock);
282 ret = rtc_update_alarm(&alrm->time);
283 if (ret == 0) {
284 memcpy(&rtc_alarm, &alrm->time, sizeof(struct rtc_time));
285
286 if (alrm->enabled)
287 enable_irq_wake(IRQ_RTCAlrm);
288 else
289 disable_irq_wake(IRQ_RTCAlrm);
290 }
291 spin_unlock_irq(&sa1100_rtc_lock);
292
293 return ret;
294}
295
296static int sa1100_rtc_proc(struct device *dev, struct seq_file *seq)
297{
298 seq_printf(seq, "trim/divider\t: 0x%08x\n", RTTR);
299 seq_printf(seq, "alarm_IRQ\t: %s\n",
300 (RTSR & RTSR_ALE) ? "yes" : "no" );
301 seq_printf(seq, "update_IRQ\t: %s\n",
302 (RTSR & RTSR_HZE) ? "yes" : "no");
303 seq_printf(seq, "periodic_IRQ\t: %s\n",
304 (OIER & OIER_E1) ? "yes" : "no");
305 seq_printf(seq, "periodic_freq\t: %ld\n", rtc_freq);
306
307 return 0;
308}
309
310static struct rtc_class_ops sa1100_rtc_ops = {
311 .open = sa1100_rtc_open,
312 .read_callback = sa1100_rtc_read_callback,
313 .release = sa1100_rtc_release,
314 .ioctl = sa1100_rtc_ioctl,
315 .read_time = sa1100_rtc_read_time,
316 .set_time = sa1100_rtc_set_time,
317 .read_alarm = sa1100_rtc_read_alarm,
318 .set_alarm = sa1100_rtc_set_alarm,
319 .proc = sa1100_rtc_proc,
320};
321
322static int sa1100_rtc_probe(struct platform_device *pdev)
323{
324 struct rtc_device *rtc;
325
326 /*
327 * According to the manual we should be able to let RTTR be zero
328 * and then a default diviser for a 32.768KHz clock is used.
329 * Apparently this doesn't work, at least for my SA1110 rev 5.
330 * If the clock divider is uninitialized then reset it to the
331 * default value to get the 1Hz clock.
332 */
333 if (RTTR == 0) {
334 RTTR = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16);
335 printk(KERN_WARNING "rtc: warning: initializing default clock divider/trim value\n");
336 /* The current RTC value probably doesn't make sense either */
337 RCNR = 0;
338 }
339
340 rtc = rtc_device_register(pdev->name, &pdev->dev, &sa1100_rtc_ops,
341 THIS_MODULE);
342
343 if (IS_ERR(rtc)) {
344 dev_err(&pdev->dev, "Unable to register the RTC device\n");
345 return PTR_ERR(rtc);
346 }
347
348 platform_set_drvdata(pdev, rtc);
349
350 dev_info(&pdev->dev, "SA11xx/PXA2xx RTC Registered\n");
351
352 return 0;
353}
354
355static int sa1100_rtc_remove(struct platform_device *pdev)
356{
357 struct rtc_device *rtc = platform_get_drvdata(pdev);
358
359 if (rtc)
360 rtc_device_unregister(rtc);
361
362 return 0;
363}
364
365static struct platform_driver sa1100_rtc_driver = {
366 .probe = sa1100_rtc_probe,
367 .remove = sa1100_rtc_remove,
368 .driver = {
369 .name = "sa1100-rtc",
370 },
371};
372
373static int __init sa1100_rtc_init(void)
374{
375 return platform_driver_register(&sa1100_rtc_driver);
376}
377
378static void __exit sa1100_rtc_exit(void)
379{
380 platform_driver_unregister(&sa1100_rtc_driver);
381}
382
383module_init(sa1100_rtc_init);
384module_exit(sa1100_rtc_exit);
385
386MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
387MODULE_DESCRIPTION("SA11x0/PXA2xx Realtime Clock Driver (RTC)");
388MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
new file mode 100644
index 000000000000..7c1f3d2e53c4
--- /dev/null
+++ b/drivers/rtc/rtc-sysfs.c
@@ -0,0 +1,124 @@
1/*
2 * RTC subsystem, sysfs interface
3 *
4 * Copyright (C) 2005 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10*/
11
12#include <linux/module.h>
13#include <linux/rtc.h>
14
15/* device attributes */
16
17static ssize_t rtc_sysfs_show_name(struct class_device *dev, char *buf)
18{
19 return sprintf(buf, "%s\n", to_rtc_device(dev)->name);
20}
21static CLASS_DEVICE_ATTR(name, S_IRUGO, rtc_sysfs_show_name, NULL);
22
23static ssize_t rtc_sysfs_show_date(struct class_device *dev, char *buf)
24{
25 ssize_t retval;
26 struct rtc_time tm;
27
28 retval = rtc_read_time(dev, &tm);
29 if (retval == 0) {
30 retval = sprintf(buf, "%04d-%02d-%02d\n",
31 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
32 }
33
34 return retval;
35}
36static CLASS_DEVICE_ATTR(date, S_IRUGO, rtc_sysfs_show_date, NULL);
37
38static ssize_t rtc_sysfs_show_time(struct class_device *dev, char *buf)
39{
40 ssize_t retval;
41 struct rtc_time tm;
42
43 retval = rtc_read_time(dev, &tm);
44 if (retval == 0) {
45 retval = sprintf(buf, "%02d:%02d:%02d\n",
46 tm.tm_hour, tm.tm_min, tm.tm_sec);
47 }
48
49 return retval;
50}
51static CLASS_DEVICE_ATTR(time, S_IRUGO, rtc_sysfs_show_time, NULL);
52
53static ssize_t rtc_sysfs_show_since_epoch(struct class_device *dev, char *buf)
54{
55 ssize_t retval;
56 struct rtc_time tm;
57
58 retval = rtc_read_time(dev, &tm);
59 if (retval == 0) {
60 unsigned long time;
61 rtc_tm_to_time(&tm, &time);
62 retval = sprintf(buf, "%lu\n", time);
63 }
64
65 return retval;
66}
67static CLASS_DEVICE_ATTR(since_epoch, S_IRUGO, rtc_sysfs_show_since_epoch, NULL);
68
69static struct attribute *rtc_attrs[] = {
70 &class_device_attr_name.attr,
71 &class_device_attr_date.attr,
72 &class_device_attr_time.attr,
73 &class_device_attr_since_epoch.attr,
74 NULL,
75};
76
77static struct attribute_group rtc_attr_group = {
78 .attrs = rtc_attrs,
79};
80
81static int __devinit rtc_sysfs_add_device(struct class_device *class_dev,
82 struct class_interface *class_intf)
83{
84 int err;
85
86 dev_info(class_dev->dev, "rtc intf: sysfs\n");
87
88 err = sysfs_create_group(&class_dev->kobj, &rtc_attr_group);
89 if (err)
90 dev_err(class_dev->dev,
91 "failed to create sysfs attributes\n");
92
93 return err;
94}
95
96static void rtc_sysfs_remove_device(struct class_device *class_dev,
97 struct class_interface *class_intf)
98{
99 sysfs_remove_group(&class_dev->kobj, &rtc_attr_group);
100}
101
102/* interface registration */
103
104static struct class_interface rtc_sysfs_interface = {
105 .add = &rtc_sysfs_add_device,
106 .remove = &rtc_sysfs_remove_device,
107};
108
109static int __init rtc_sysfs_init(void)
110{
111 return rtc_interface_register(&rtc_sysfs_interface);
112}
113
114static void __exit rtc_sysfs_exit(void)
115{
116 class_interface_unregister(&rtc_sysfs_interface);
117}
118
119module_init(rtc_sysfs_init);
120module_exit(rtc_sysfs_exit);
121
122MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
123MODULE_DESCRIPTION("RTC class sysfs interface");
124MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
new file mode 100644
index 000000000000..43d107487820
--- /dev/null
+++ b/drivers/rtc/rtc-test.c
@@ -0,0 +1,204 @@
1/*
2 * An RTC test device/driver
3 * Copyright (C) 2005 Tower Technologies
4 * Author: Alessandro Zummo <a.zummo@towertech.it>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/module.h>
12#include <linux/err.h>
13#include <linux/rtc.h>
14#include <linux/platform_device.h>
15
16static struct platform_device *test0 = NULL, *test1 = NULL;
17
18static int test_rtc_read_alarm(struct device *dev,
19 struct rtc_wkalrm *alrm)
20{
21 return 0;
22}
23
24static int test_rtc_set_alarm(struct device *dev,
25 struct rtc_wkalrm *alrm)
26{
27 return 0;
28}
29
30static int test_rtc_read_time(struct device *dev,
31 struct rtc_time *tm)
32{
33 rtc_time_to_tm(get_seconds(), tm);
34 return 0;
35}
36
37static int test_rtc_set_time(struct device *dev,
38 struct rtc_time *tm)
39{
40 return 0;
41}
42
43static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
44{
45 return 0;
46}
47
48static int test_rtc_proc(struct device *dev, struct seq_file *seq)
49{
50 struct platform_device *plat_dev = to_platform_device(dev);
51
52 seq_printf(seq, "24hr\t\t: yes\n");
53 seq_printf(seq, "test\t\t: yes\n");
54 seq_printf(seq, "id\t\t: %d\n", plat_dev->id);
55
56 return 0;
57}
58
59static int test_rtc_ioctl(struct device *dev, unsigned int cmd,
60 unsigned long arg)
61{
62 /* We do support interrupts, they're generated
63 * using the sysfs interface.
64 */
65 switch (cmd) {
66 case RTC_PIE_ON:
67 case RTC_PIE_OFF:
68 case RTC_UIE_ON:
69 case RTC_UIE_OFF:
70 case RTC_AIE_ON:
71 case RTC_AIE_OFF:
72 return 0;
73
74 default:
75 return -EINVAL;
76 }
77}
78
79static struct rtc_class_ops test_rtc_ops = {
80 .proc = test_rtc_proc,
81 .read_time = test_rtc_read_time,
82 .set_time = test_rtc_set_time,
83 .read_alarm = test_rtc_read_alarm,
84 .set_alarm = test_rtc_set_alarm,
85 .set_mmss = test_rtc_set_mmss,
86 .ioctl = test_rtc_ioctl,
87};
88
89static ssize_t test_irq_show(struct device *dev,
90 struct device_attribute *attr, char *buf)
91{
92 return sprintf(buf, "%d\n", 42);
93}
94static ssize_t test_irq_store(struct device *dev,
95 struct device_attribute *attr,
96 const char *buf, size_t count)
97{
98 int retval;
99 struct platform_device *plat_dev = to_platform_device(dev);
100 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
101
102 retval = count;
103 if (strncmp(buf, "tick", 4) == 0)
104 rtc_update_irq(&rtc->class_dev, 1, RTC_PF | RTC_IRQF);
105 else if (strncmp(buf, "alarm", 5) == 0)
106 rtc_update_irq(&rtc->class_dev, 1, RTC_AF | RTC_IRQF);
107 else if (strncmp(buf, "update", 6) == 0)
108 rtc_update_irq(&rtc->class_dev, 1, RTC_UF | RTC_IRQF);
109 else
110 retval = -EINVAL;
111
112 return retval;
113}
114static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
115
116static int test_probe(struct platform_device *plat_dev)
117{
118 int err;
119 struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
120 &test_rtc_ops, THIS_MODULE);
121 if (IS_ERR(rtc)) {
122 err = PTR_ERR(rtc);
123 dev_err(&plat_dev->dev,
124 "unable to register the class device\n");
125 return err;
126 }
127 device_create_file(&plat_dev->dev, &dev_attr_irq);
128
129 platform_set_drvdata(plat_dev, rtc);
130
131 return 0;
132}
133
134static int __devexit test_remove(struct platform_device *plat_dev)
135{
136 struct rtc_device *rtc = platform_get_drvdata(plat_dev);
137
138 rtc_device_unregister(rtc);
139 device_remove_file(&plat_dev->dev, &dev_attr_irq);
140
141 return 0;
142}
143
144static struct platform_driver test_drv = {
145 .probe = test_probe,
146 .remove = __devexit_p(test_remove),
147 .driver = {
148 .name = "rtc-test",
149 .owner = THIS_MODULE,
150 },
151};
152
153static int __init test_init(void)
154{
155 int err;
156
157 if ((err = platform_driver_register(&test_drv)))
158 return err;
159
160 if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
161 err = -ENOMEM;
162 goto exit_driver_unregister;
163 }
164
165 if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
166 err = -ENOMEM;
167 goto exit_free_test0;
168 }
169
170 if ((err = platform_device_add(test0)))
171 goto exit_free_test1;
172
173 if ((err = platform_device_add(test1)))
174 goto exit_device_unregister;
175
176 return 0;
177
178exit_device_unregister:
179 platform_device_unregister(test0);
180
181exit_free_test1:
182 platform_device_put(test1);
183
184exit_free_test0:
185 platform_device_put(test0);
186
187exit_driver_unregister:
188 platform_driver_unregister(&test_drv);
189 return err;
190}
191
192static void __exit test_exit(void)
193{
194 platform_device_unregister(test0);
195 platform_device_unregister(test1);
196 platform_driver_unregister(&test_drv);
197}
198
199MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
200MODULE_DESCRIPTION("RTC test driver/device");
201MODULE_LICENSE("GPL");
202
203module_init(test_init);
204module_exit(test_exit);
diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c
new file mode 100644
index 000000000000..621d17afc0d9
--- /dev/null
+++ b/drivers/rtc/rtc-x1205.c
@@ -0,0 +1,619 @@
1/*
2 * An i2c driver for the Xicor/Intersil X1205 RTC
3 * Copyright 2004 Karen Spearel
4 * Copyright 2005 Alessandro Zummo
5 *
6 * please send all reports to:
7 * Karen Spearel <kas111 at gmail dot com>
8 * Alessandro Zummo <a.zummo@towertech.it>
9 *
10 * based on a lot of other RTC drivers.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17#include <linux/i2c.h>
18#include <linux/bcd.h>
19#include <linux/rtc.h>
20#include <linux/delay.h>
21
22#define DRV_VERSION "1.0.6"
23
24/* Addresses to scan: none. This chip is located at
25 * 0x6f and uses a two bytes register addressing.
26 * Two bytes need to be written to read a single register,
27 * while most other chips just require one and take the second
28 * one as the data to be written. To prevent corrupting
29 * unknown chips, the user must explicitely set the probe parameter.
30 */
31
32static unsigned short normal_i2c[] = { I2C_CLIENT_END };
33
34/* Insmod parameters */
35I2C_CLIENT_INSMOD;
36
37/* offsets into CCR area */
38
39#define CCR_SEC 0
40#define CCR_MIN 1
41#define CCR_HOUR 2
42#define CCR_MDAY 3
43#define CCR_MONTH 4
44#define CCR_YEAR 5
45#define CCR_WDAY 6
46#define CCR_Y2K 7
47
48#define X1205_REG_SR 0x3F /* status register */
49#define X1205_REG_Y2K 0x37
50#define X1205_REG_DW 0x36
51#define X1205_REG_YR 0x35
52#define X1205_REG_MO 0x34
53#define X1205_REG_DT 0x33
54#define X1205_REG_HR 0x32
55#define X1205_REG_MN 0x31
56#define X1205_REG_SC 0x30
57#define X1205_REG_DTR 0x13
58#define X1205_REG_ATR 0x12
59#define X1205_REG_INT 0x11
60#define X1205_REG_0 0x10
61#define X1205_REG_Y2K1 0x0F
62#define X1205_REG_DWA1 0x0E
63#define X1205_REG_YRA1 0x0D
64#define X1205_REG_MOA1 0x0C
65#define X1205_REG_DTA1 0x0B
66#define X1205_REG_HRA1 0x0A
67#define X1205_REG_MNA1 0x09
68#define X1205_REG_SCA1 0x08
69#define X1205_REG_Y2K0 0x07
70#define X1205_REG_DWA0 0x06
71#define X1205_REG_YRA0 0x05
72#define X1205_REG_MOA0 0x04
73#define X1205_REG_DTA0 0x03
74#define X1205_REG_HRA0 0x02
75#define X1205_REG_MNA0 0x01
76#define X1205_REG_SCA0 0x00
77
78#define X1205_CCR_BASE 0x30 /* Base address of CCR */
79#define X1205_ALM0_BASE 0x00 /* Base address of ALARM0 */
80
81#define X1205_SR_RTCF 0x01 /* Clock failure */
82#define X1205_SR_WEL 0x02 /* Write Enable Latch */
83#define X1205_SR_RWEL 0x04 /* Register Write Enable */
84
85#define X1205_DTR_DTR0 0x01
86#define X1205_DTR_DTR1 0x02
87#define X1205_DTR_DTR2 0x04
88
89#define X1205_HR_MIL 0x80 /* Set in ccr.hour for 24 hr mode */
90
91/* Prototypes */
92static int x1205_attach(struct i2c_adapter *adapter);
93static int x1205_detach(struct i2c_client *client);
94static int x1205_probe(struct i2c_adapter *adapter, int address, int kind);
95
96static struct i2c_driver x1205_driver = {
97 .driver = {
98 .name = "x1205",
99 },
100 .id = I2C_DRIVERID_X1205,
101 .attach_adapter = &x1205_attach,
102 .detach_client = &x1205_detach,
103};
104
105/*
106 * In the routines that deal directly with the x1205 hardware, we use
107 * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch
108 * Epoch is initialized as 2000. Time is set to UTC.
109 */
110static int x1205_get_datetime(struct i2c_client *client, struct rtc_time *tm,
111 unsigned char reg_base)
112{
113 unsigned char dt_addr[2] = { 0, reg_base };
114
115 unsigned char buf[8];
116
117 struct i2c_msg msgs[] = {
118 { client->addr, 0, 2, dt_addr }, /* setup read ptr */
119 { client->addr, I2C_M_RD, 8, buf }, /* read date */
120 };
121
122 /* read date registers */
123 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
124 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
125 return -EIO;
126 }
127
128 dev_dbg(&client->dev,
129 "%s: raw read data - sec=%02x, min=%02x, hr=%02x, "
130 "mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n",
131 __FUNCTION__,
132 buf[0], buf[1], buf[2], buf[3],
133 buf[4], buf[5], buf[6], buf[7]);
134
135 tm->tm_sec = BCD2BIN(buf[CCR_SEC]);
136 tm->tm_min = BCD2BIN(buf[CCR_MIN]);
137 tm->tm_hour = BCD2BIN(buf[CCR_HOUR] & 0x3F); /* hr is 0-23 */
138 tm->tm_mday = BCD2BIN(buf[CCR_MDAY]);
139 tm->tm_mon = BCD2BIN(buf[CCR_MONTH]) - 1; /* mon is 0-11 */
140 tm->tm_year = BCD2BIN(buf[CCR_YEAR])
141 + (BCD2BIN(buf[CCR_Y2K]) * 100) - 1900;
142 tm->tm_wday = buf[CCR_WDAY];
143
144 dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
145 "mday=%d, mon=%d, year=%d, wday=%d\n",
146 __FUNCTION__,
147 tm->tm_sec, tm->tm_min, tm->tm_hour,
148 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
149
150 return 0;
151}
152
153static int x1205_get_status(struct i2c_client *client, unsigned char *sr)
154{
155 static unsigned char sr_addr[2] = { 0, X1205_REG_SR };
156
157 struct i2c_msg msgs[] = {
158 { client->addr, 0, 2, sr_addr }, /* setup read ptr */
159 { client->addr, I2C_M_RD, 1, sr }, /* read status */
160 };
161
162 /* read status register */
163 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
164 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
165 return -EIO;
166 }
167
168 return 0;
169}
170
171static int x1205_set_datetime(struct i2c_client *client, struct rtc_time *tm,
172 int datetoo, u8 reg_base)
173{
174 int i, xfer;
175 unsigned char buf[8];
176
177 static const unsigned char wel[3] = { 0, X1205_REG_SR,
178 X1205_SR_WEL };
179
180 static const unsigned char rwel[3] = { 0, X1205_REG_SR,
181 X1205_SR_WEL | X1205_SR_RWEL };
182
183 static const unsigned char diswe[3] = { 0, X1205_REG_SR, 0 };
184
185 dev_dbg(&client->dev,
186 "%s: secs=%d, mins=%d, hours=%d\n",
187 __FUNCTION__,
188 tm->tm_sec, tm->tm_min, tm->tm_hour);
189
190 buf[CCR_SEC] = BIN2BCD(tm->tm_sec);
191 buf[CCR_MIN] = BIN2BCD(tm->tm_min);
192
193 /* set hour and 24hr bit */
194 buf[CCR_HOUR] = BIN2BCD(tm->tm_hour) | X1205_HR_MIL;
195
196 /* should we also set the date? */
197 if (datetoo) {
198 dev_dbg(&client->dev,
199 "%s: mday=%d, mon=%d, year=%d, wday=%d\n",
200 __FUNCTION__,
201 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
202
203 buf[CCR_MDAY] = BIN2BCD(tm->tm_mday);
204
205 /* month, 1 - 12 */
206 buf[CCR_MONTH] = BIN2BCD(tm->tm_mon + 1);
207
208 /* year, since the rtc epoch*/
209 buf[CCR_YEAR] = BIN2BCD(tm->tm_year % 100);
210 buf[CCR_WDAY] = tm->tm_wday & 0x07;
211 buf[CCR_Y2K] = BIN2BCD(tm->tm_year / 100);
212 }
213
214 /* this sequence is required to unlock the chip */
215 if ((xfer = i2c_master_send(client, wel, 3)) != 3) {
216 dev_err(&client->dev, "%s: wel - %d\n", __FUNCTION__, xfer);
217 return -EIO;
218 }
219
220 if ((xfer = i2c_master_send(client, rwel, 3)) != 3) {
221 dev_err(&client->dev, "%s: rwel - %d\n", __FUNCTION__, xfer);
222 return -EIO;
223 }
224
225 /* write register's data */
226 for (i = 0; i < (datetoo ? 8 : 3); i++) {
227 unsigned char rdata[3] = { 0, reg_base + i, buf[i] };
228
229 xfer = i2c_master_send(client, rdata, 3);
230 if (xfer != 3) {
231 dev_err(&client->dev,
232 "%s: xfer=%d addr=%02x, data=%02x\n",
233 __FUNCTION__,
234 xfer, rdata[1], rdata[2]);
235 return -EIO;
236 }
237 };
238
239 /* disable further writes */
240 if ((xfer = i2c_master_send(client, diswe, 3)) != 3) {
241 dev_err(&client->dev, "%s: diswe - %d\n", __FUNCTION__, xfer);
242 return -EIO;
243 }
244
245 return 0;
246}
247
248static int x1205_fix_osc(struct i2c_client *client)
249{
250 int err;
251 struct rtc_time tm;
252
253 tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
254
255 if ((err = x1205_set_datetime(client, &tm, 0, X1205_CCR_BASE)) < 0)
256 dev_err(&client->dev,
257 "unable to restart the oscillator\n");
258
259 return err;
260}
261
262static int x1205_get_dtrim(struct i2c_client *client, int *trim)
263{
264 unsigned char dtr;
265 static unsigned char dtr_addr[2] = { 0, X1205_REG_DTR };
266
267 struct i2c_msg msgs[] = {
268 { client->addr, 0, 2, dtr_addr }, /* setup read ptr */
269 { client->addr, I2C_M_RD, 1, &dtr }, /* read dtr */
270 };
271
272 /* read dtr register */
273 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
274 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
275 return -EIO;
276 }
277
278 dev_dbg(&client->dev, "%s: raw dtr=%x\n", __FUNCTION__, dtr);
279
280 *trim = 0;
281
282 if (dtr & X1205_DTR_DTR0)
283 *trim += 20;
284
285 if (dtr & X1205_DTR_DTR1)
286 *trim += 10;
287
288 if (dtr & X1205_DTR_DTR2)
289 *trim = -*trim;
290
291 return 0;
292}
293
294static int x1205_get_atrim(struct i2c_client *client, int *trim)
295{
296 s8 atr;
297 static unsigned char atr_addr[2] = { 0, X1205_REG_ATR };
298
299 struct i2c_msg msgs[] = {
300 { client->addr, 0, 2, atr_addr }, /* setup read ptr */
301 { client->addr, I2C_M_RD, 1, &atr }, /* read atr */
302 };
303
304 /* read atr register */
305 if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
306 dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
307 return -EIO;
308 }
309
310 dev_dbg(&client->dev, "%s: raw atr=%x\n", __FUNCTION__, atr);
311
312 /* atr is a two's complement value on 6 bits,
313 * perform sign extension. The formula is
314 * Catr = (atr * 0.25pF) + 11.00pF.
315 */
316 if (atr & 0x20)
317 atr |= 0xC0;
318
319 dev_dbg(&client->dev, "%s: raw atr=%x (%d)\n", __FUNCTION__, atr, atr);
320
321 *trim = (atr * 250) + 11000;
322
323 dev_dbg(&client->dev, "%s: real=%d\n", __FUNCTION__, *trim);
324
325 return 0;
326}
327
328struct x1205_limit
329{
330 unsigned char reg, mask, min, max;
331};
332
333static int x1205_validate_client(struct i2c_client *client)
334{
335 int i, xfer;
336
337 /* Probe array. We will read the register at the specified
338 * address and check if the given bits are zero.
339 */
340 static const unsigned char probe_zero_pattern[] = {
341 /* register, mask */
342 X1205_REG_SR, 0x18,
343 X1205_REG_DTR, 0xF8,
344 X1205_REG_ATR, 0xC0,
345 X1205_REG_INT, 0x18,
346 X1205_REG_0, 0xFF,
347 };
348
349 static const struct x1205_limit probe_limits_pattern[] = {
350 /* register, mask, min, max */
351 { X1205_REG_Y2K, 0xFF, 19, 20 },
352 { X1205_REG_DW, 0xFF, 0, 6 },
353 { X1205_REG_YR, 0xFF, 0, 99 },
354 { X1205_REG_MO, 0xFF, 0, 12 },
355 { X1205_REG_DT, 0xFF, 0, 31 },
356 { X1205_REG_HR, 0x7F, 0, 23 },
357 { X1205_REG_MN, 0xFF, 0, 59 },
358 { X1205_REG_SC, 0xFF, 0, 59 },
359 { X1205_REG_Y2K1, 0xFF, 19, 20 },
360 { X1205_REG_Y2K0, 0xFF, 19, 20 },
361 };
362
363 /* check that registers have bits a 0 where expected */
364 for (i = 0; i < ARRAY_SIZE(probe_zero_pattern); i += 2) {
365 unsigned char buf;
366
367 unsigned char addr[2] = { 0, probe_zero_pattern[i] };
368
369 struct i2c_msg msgs[2] = {
370 { client->addr, 0, 2, addr },
371 { client->addr, I2C_M_RD, 1, &buf },
372 };
373
374 if ((xfer = i2c_transfer(client->adapter, msgs, 2)) != 2) {
375 dev_err(&client->adapter->dev,
376 "%s: could not read register %x\n",
377 __FUNCTION__, probe_zero_pattern[i]);
378
379 return -EIO;
380 }
381
382 if ((buf & probe_zero_pattern[i+1]) != 0) {
383 dev_err(&client->adapter->dev,
384 "%s: register=%02x, zero pattern=%d, value=%x\n",
385 __FUNCTION__, probe_zero_pattern[i], i, buf);
386
387 return -ENODEV;
388 }
389 }
390
391 /* check limits (only registers with bcd values) */
392 for (i = 0; i < ARRAY_SIZE(probe_limits_pattern); i++) {
393 unsigned char reg, value;
394
395 unsigned char addr[2] = { 0, probe_limits_pattern[i].reg };
396
397 struct i2c_msg msgs[2] = {
398 { client->addr, 0, 2, addr },
399 { client->addr, I2C_M_RD, 1, &reg },
400 };
401
402 if ((xfer = i2c_transfer(client->adapter, msgs, 2)) != 2) {
403 dev_err(&client->adapter->dev,
404 "%s: could not read register %x\n",
405 __FUNCTION__, probe_limits_pattern[i].reg);
406
407 return -EIO;
408 }
409
410 value = BCD2BIN(reg & probe_limits_pattern[i].mask);
411
412 if (value > probe_limits_pattern[i].max ||
413 value < probe_limits_pattern[i].min) {
414 dev_dbg(&client->adapter->dev,
415 "%s: register=%x, lim pattern=%d, value=%d\n",
416 __FUNCTION__, probe_limits_pattern[i].reg,
417 i, value);
418
419 return -ENODEV;
420 }
421 }
422
423 return 0;
424}
425
426static int x1205_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
427{
428 return x1205_get_datetime(to_i2c_client(dev),
429 &alrm->time, X1205_ALM0_BASE);
430}
431
432static int x1205_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
433{
434 return x1205_set_datetime(to_i2c_client(dev),
435 &alrm->time, 1, X1205_ALM0_BASE);
436}
437
438static int x1205_rtc_read_time(struct device *dev, struct rtc_time *tm)
439{
440 return x1205_get_datetime(to_i2c_client(dev),
441 tm, X1205_CCR_BASE);
442}
443
444static int x1205_rtc_set_time(struct device *dev, struct rtc_time *tm)
445{
446 return x1205_set_datetime(to_i2c_client(dev),
447 tm, 1, X1205_CCR_BASE);
448}
449
450static int x1205_rtc_proc(struct device *dev, struct seq_file *seq)
451{
452 int err, dtrim, atrim;
453
454 seq_printf(seq, "24hr\t\t: yes\n");
455
456 if ((err = x1205_get_dtrim(to_i2c_client(dev), &dtrim)) == 0)
457 seq_printf(seq, "digital_trim\t: %d ppm\n", dtrim);
458
459 if ((err = x1205_get_atrim(to_i2c_client(dev), &atrim)) == 0)
460 seq_printf(seq, "analog_trim\t: %d.%02d pF\n",
461 atrim / 1000, atrim % 1000);
462 return 0;
463}
464
465static struct rtc_class_ops x1205_rtc_ops = {
466 .proc = x1205_rtc_proc,
467 .read_time = x1205_rtc_read_time,
468 .set_time = x1205_rtc_set_time,
469 .read_alarm = x1205_rtc_read_alarm,
470 .set_alarm = x1205_rtc_set_alarm,
471};
472
473static ssize_t x1205_sysfs_show_atrim(struct device *dev,
474 struct device_attribute *attr, char *buf)
475{
476 int atrim;
477
478 if (x1205_get_atrim(to_i2c_client(dev), &atrim) == 0)
479 return sprintf(buf, "%d.%02d pF\n",
480 atrim / 1000, atrim % 1000);
481 return 0;
482}
483static DEVICE_ATTR(atrim, S_IRUGO, x1205_sysfs_show_atrim, NULL);
484
485static ssize_t x1205_sysfs_show_dtrim(struct device *dev,
486 struct device_attribute *attr, char *buf)
487{
488 int dtrim;
489
490 if (x1205_get_dtrim(to_i2c_client(dev), &dtrim) == 0)
491 return sprintf(buf, "%d ppm\n", dtrim);
492
493 return 0;
494}
495static DEVICE_ATTR(dtrim, S_IRUGO, x1205_sysfs_show_dtrim, NULL);
496
497static int x1205_attach(struct i2c_adapter *adapter)
498{
499 dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
500 return i2c_probe(adapter, &addr_data, x1205_probe);
501}
502
503static int x1205_probe(struct i2c_adapter *adapter, int address, int kind)
504{
505 int err = 0;
506 unsigned char sr;
507 struct i2c_client *client;
508 struct rtc_device *rtc;
509
510 dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
511
512 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
513 err = -ENODEV;
514 goto exit;
515 }
516
517 if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
518 err = -ENOMEM;
519 goto exit;
520 }
521
522 /* I2C client */
523 client->addr = address;
524 client->driver = &x1205_driver;
525 client->adapter = adapter;
526
527 strlcpy(client->name, x1205_driver.driver.name, I2C_NAME_SIZE);
528
529 /* Verify the chip is really an X1205 */
530 if (kind < 0) {
531 if (x1205_validate_client(client) < 0) {
532 err = -ENODEV;
533 goto exit_kfree;
534 }
535 }
536
537 /* Inform the i2c layer */
538 if ((err = i2c_attach_client(client)))
539 goto exit_kfree;
540
541 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
542
543 rtc = rtc_device_register(x1205_driver.driver.name, &client->dev,
544 &x1205_rtc_ops, THIS_MODULE);
545
546 if (IS_ERR(rtc)) {
547 err = PTR_ERR(rtc);
548 dev_err(&client->dev,
549 "unable to register the class device\n");
550 goto exit_detach;
551 }
552
553 i2c_set_clientdata(client, rtc);
554
555 /* Check for power failures and eventualy enable the osc */
556 if ((err = x1205_get_status(client, &sr)) == 0) {
557 if (sr & X1205_SR_RTCF) {
558 dev_err(&client->dev,
559 "power failure detected, "
560 "please set the clock\n");
561 udelay(50);
562 x1205_fix_osc(client);
563 }
564 }
565 else
566 dev_err(&client->dev, "couldn't read status\n");
567
568 device_create_file(&client->dev, &dev_attr_atrim);
569 device_create_file(&client->dev, &dev_attr_dtrim);
570
571 return 0;
572
573exit_detach:
574 i2c_detach_client(client);
575
576exit_kfree:
577 kfree(client);
578
579exit:
580 return err;
581}
582
583static int x1205_detach(struct i2c_client *client)
584{
585 int err;
586 struct rtc_device *rtc = i2c_get_clientdata(client);
587
588 dev_dbg(&client->dev, "%s\n", __FUNCTION__);
589
590 if (rtc)
591 rtc_device_unregister(rtc);
592
593 if ((err = i2c_detach_client(client)))
594 return err;
595
596 kfree(client);
597
598 return 0;
599}
600
601static int __init x1205_init(void)
602{
603 return i2c_add_driver(&x1205_driver);
604}
605
606static void __exit x1205_exit(void)
607{
608 i2c_del_driver(&x1205_driver);
609}
610
611MODULE_AUTHOR(
612 "Karen Spearel <kas111 at gmail dot com>, "
613 "Alessandro Zummo <a.zummo@towertech.it>");
614MODULE_DESCRIPTION("Xicor/Intersil X1205 RTC driver");
615MODULE_LICENSE("GPL");
616MODULE_VERSION(DRV_VERSION);
617
618module_init(x1205_init);
619module_exit(x1205_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-02 08:41:26 -0500