Loading...
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * pcap rtc code for Motorola EZX phones
4 *
5 * Copyright (c) 2008 guiming zhuo <gmzhuo@gmail.com>
6 * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com>
7 *
8 * Based on Motorola's rtc.c Copyright (c) 2003-2005 Motorola
9 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/mfd/ezx-pcap.h>
15#include <linux/rtc.h>
16#include <linux/slab.h>
17#include <linux/platform_device.h>
18
19struct pcap_rtc {
20 struct pcap_chip *pcap;
21 struct rtc_device *rtc;
22};
23
24static irqreturn_t pcap_rtc_irq(int irq, void *_pcap_rtc)
25{
26 struct pcap_rtc *pcap_rtc = _pcap_rtc;
27 unsigned long rtc_events;
28
29 if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ))
30 rtc_events = RTC_IRQF | RTC_UF;
31 else if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA))
32 rtc_events = RTC_IRQF | RTC_AF;
33 else
34 rtc_events = 0;
35
36 rtc_update_irq(pcap_rtc->rtc, 1, rtc_events);
37 return IRQ_HANDLED;
38}
39
40static int pcap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
41{
42 struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
43 struct rtc_time *tm = &alrm->time;
44 unsigned long secs;
45 u32 tod; /* time of day, seconds since midnight */
46 u32 days; /* days since 1/1/1970 */
47
48 ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TODA, &tod);
49 secs = tod & PCAP_RTC_TOD_MASK;
50
51 ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, &days);
52 secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY;
53
54 rtc_time64_to_tm(secs, tm);
55
56 return 0;
57}
58
59static int pcap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
60{
61 struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
62 unsigned long secs = rtc_tm_to_time64(&alrm->time);
63 u32 tod, days;
64
65 tod = secs % SEC_PER_DAY;
66 ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_TODA, tod);
67
68 days = secs / SEC_PER_DAY;
69 ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, days);
70
71 return 0;
72}
73
74static int pcap_rtc_read_time(struct device *dev, struct rtc_time *tm)
75{
76 struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
77 unsigned long secs;
78 u32 tod, days;
79
80 ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TOD, &tod);
81 secs = tod & PCAP_RTC_TOD_MASK;
82
83 ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAY, &days);
84 secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY;
85
86 rtc_time64_to_tm(secs, tm);
87
88 return 0;
89}
90
91static int pcap_rtc_set_time(struct device *dev, struct rtc_time *tm)
92{
93 struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
94 unsigned long secs = rtc_tm_to_time64(tm);
95 u32 tod, days;
96
97 tod = secs % SEC_PER_DAY;
98 ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_TOD, tod);
99
100 days = secs / SEC_PER_DAY;
101 ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_DAY, days);
102
103 return 0;
104}
105
106static int pcap_rtc_irq_enable(struct device *dev, int pirq, unsigned int en)
107{
108 struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
109
110 if (en)
111 enable_irq(pcap_to_irq(pcap_rtc->pcap, pirq));
112 else
113 disable_irq(pcap_to_irq(pcap_rtc->pcap, pirq));
114
115 return 0;
116}
117
118static int pcap_rtc_alarm_irq_enable(struct device *dev, unsigned int en)
119{
120 return pcap_rtc_irq_enable(dev, PCAP_IRQ_TODA, en);
121}
122
123static const struct rtc_class_ops pcap_rtc_ops = {
124 .read_time = pcap_rtc_read_time,
125 .set_time = pcap_rtc_set_time,
126 .read_alarm = pcap_rtc_read_alarm,
127 .set_alarm = pcap_rtc_set_alarm,
128 .alarm_irq_enable = pcap_rtc_alarm_irq_enable,
129};
130
131static int __init pcap_rtc_probe(struct platform_device *pdev)
132{
133 struct pcap_rtc *pcap_rtc;
134 int timer_irq, alarm_irq;
135 int err = -ENOMEM;
136
137 pcap_rtc = devm_kzalloc(&pdev->dev, sizeof(struct pcap_rtc),
138 GFP_KERNEL);
139 if (!pcap_rtc)
140 return err;
141
142 pcap_rtc->pcap = dev_get_drvdata(pdev->dev.parent);
143
144 platform_set_drvdata(pdev, pcap_rtc);
145
146 pcap_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
147 if (IS_ERR(pcap_rtc->rtc))
148 return PTR_ERR(pcap_rtc->rtc);
149
150 pcap_rtc->rtc->ops = &pcap_rtc_ops;
151 pcap_rtc->rtc->range_max = (1 << 14) * 86400ULL - 1;
152
153 timer_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ);
154 alarm_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA);
155
156 err = devm_request_irq(&pdev->dev, timer_irq, pcap_rtc_irq, 0,
157 "RTC Timer", pcap_rtc);
158 if (err)
159 return err;
160
161 err = devm_request_irq(&pdev->dev, alarm_irq, pcap_rtc_irq, 0,
162 "RTC Alarm", pcap_rtc);
163 if (err)
164 return err;
165
166 return rtc_register_device(pcap_rtc->rtc);
167}
168
169static int __exit pcap_rtc_remove(struct platform_device *pdev)
170{
171 return 0;
172}
173
174static struct platform_driver pcap_rtc_driver = {
175 .remove = __exit_p(pcap_rtc_remove),
176 .driver = {
177 .name = "pcap-rtc",
178 },
179};
180
181module_platform_driver_probe(pcap_rtc_driver, pcap_rtc_probe);
182
183MODULE_DESCRIPTION("Motorola pcap rtc driver");
184MODULE_AUTHOR("guiming zhuo <gmzhuo@gmail.com>");
185MODULE_LICENSE("GPL");
1/*
2 * pcap rtc code for Motorola EZX phones
3 *
4 * Copyright (c) 2008 guiming zhuo <gmzhuo@gmail.com>
5 * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com>
6 *
7 * Based on Motorola's rtc.c Copyright (c) 2003-2005 Motorola
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
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/mfd/ezx-pcap.h>
19#include <linux/rtc.h>
20#include <linux/slab.h>
21#include <linux/platform_device.h>
22
23struct pcap_rtc {
24 struct pcap_chip *pcap;
25 struct rtc_device *rtc;
26};
27
28static irqreturn_t pcap_rtc_irq(int irq, void *_pcap_rtc)
29{
30 struct pcap_rtc *pcap_rtc = _pcap_rtc;
31 unsigned long rtc_events;
32
33 if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ))
34 rtc_events = RTC_IRQF | RTC_UF;
35 else if (irq == pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA))
36 rtc_events = RTC_IRQF | RTC_AF;
37 else
38 rtc_events = 0;
39
40 rtc_update_irq(pcap_rtc->rtc, 1, rtc_events);
41 return IRQ_HANDLED;
42}
43
44static int pcap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
45{
46 struct platform_device *pdev = to_platform_device(dev);
47 struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
48 struct rtc_time *tm = &alrm->time;
49 unsigned long secs;
50 u32 tod; /* time of day, seconds since midnight */
51 u32 days; /* days since 1/1/1970 */
52
53 ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TODA, &tod);
54 secs = tod & PCAP_RTC_TOD_MASK;
55
56 ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, &days);
57 secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY;
58
59 rtc_time_to_tm(secs, tm);
60
61 return 0;
62}
63
64static int pcap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
65{
66 struct platform_device *pdev = to_platform_device(dev);
67 struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
68 struct rtc_time *tm = &alrm->time;
69 unsigned long secs;
70 u32 tod, days;
71
72 rtc_tm_to_time(tm, &secs);
73
74 tod = secs % SEC_PER_DAY;
75 ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_TODA, tod);
76
77 days = secs / SEC_PER_DAY;
78 ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_DAYA, days);
79
80 return 0;
81}
82
83static int pcap_rtc_read_time(struct device *dev, struct rtc_time *tm)
84{
85 struct platform_device *pdev = to_platform_device(dev);
86 struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
87 unsigned long secs;
88 u32 tod, days;
89
90 ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_TOD, &tod);
91 secs = tod & PCAP_RTC_TOD_MASK;
92
93 ezx_pcap_read(pcap_rtc->pcap, PCAP_REG_RTC_DAY, &days);
94 secs += (days & PCAP_RTC_DAY_MASK) * SEC_PER_DAY;
95
96 rtc_time_to_tm(secs, tm);
97
98 return rtc_valid_tm(tm);
99}
100
101static int pcap_rtc_set_mmss(struct device *dev, unsigned long secs)
102{
103 struct platform_device *pdev = to_platform_device(dev);
104 struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
105 u32 tod, days;
106
107 tod = secs % SEC_PER_DAY;
108 ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_TOD, tod);
109
110 days = secs / SEC_PER_DAY;
111 ezx_pcap_write(pcap_rtc->pcap, PCAP_REG_RTC_DAY, days);
112
113 return 0;
114}
115
116static int pcap_rtc_irq_enable(struct device *dev, int pirq, unsigned int en)
117{
118 struct platform_device *pdev = to_platform_device(dev);
119 struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
120
121 if (en)
122 enable_irq(pcap_to_irq(pcap_rtc->pcap, pirq));
123 else
124 disable_irq(pcap_to_irq(pcap_rtc->pcap, pirq));
125
126 return 0;
127}
128
129static int pcap_rtc_alarm_irq_enable(struct device *dev, unsigned int en)
130{
131 return pcap_rtc_irq_enable(dev, PCAP_IRQ_TODA, en);
132}
133
134static const struct rtc_class_ops pcap_rtc_ops = {
135 .read_time = pcap_rtc_read_time,
136 .read_alarm = pcap_rtc_read_alarm,
137 .set_alarm = pcap_rtc_set_alarm,
138 .set_mmss = pcap_rtc_set_mmss,
139 .alarm_irq_enable = pcap_rtc_alarm_irq_enable,
140};
141
142static int __devinit pcap_rtc_probe(struct platform_device *pdev)
143{
144 struct pcap_rtc *pcap_rtc;
145 int timer_irq, alarm_irq;
146 int err = -ENOMEM;
147
148 pcap_rtc = kmalloc(sizeof(struct pcap_rtc), GFP_KERNEL);
149 if (!pcap_rtc)
150 return err;
151
152 pcap_rtc->pcap = dev_get_drvdata(pdev->dev.parent);
153
154 platform_set_drvdata(pdev, pcap_rtc);
155
156 pcap_rtc->rtc = rtc_device_register("pcap", &pdev->dev,
157 &pcap_rtc_ops, THIS_MODULE);
158 if (IS_ERR(pcap_rtc->rtc)) {
159 err = PTR_ERR(pcap_rtc->rtc);
160 goto fail_rtc;
161 }
162
163
164 timer_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ);
165 alarm_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA);
166
167 err = request_irq(timer_irq, pcap_rtc_irq, 0, "RTC Timer", pcap_rtc);
168 if (err)
169 goto fail_timer;
170
171 err = request_irq(alarm_irq, pcap_rtc_irq, 0, "RTC Alarm", pcap_rtc);
172 if (err)
173 goto fail_alarm;
174
175 return 0;
176fail_alarm:
177 free_irq(timer_irq, pcap_rtc);
178fail_timer:
179 rtc_device_unregister(pcap_rtc->rtc);
180fail_rtc:
181 platform_set_drvdata(pdev, NULL);
182 kfree(pcap_rtc);
183 return err;
184}
185
186static int __devexit pcap_rtc_remove(struct platform_device *pdev)
187{
188 struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
189
190 free_irq(pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ), pcap_rtc);
191 free_irq(pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA), pcap_rtc);
192 rtc_device_unregister(pcap_rtc->rtc);
193 kfree(pcap_rtc);
194
195 return 0;
196}
197
198static struct platform_driver pcap_rtc_driver = {
199 .remove = __devexit_p(pcap_rtc_remove),
200 .driver = {
201 .name = "pcap-rtc",
202 .owner = THIS_MODULE,
203 },
204};
205
206static int __init rtc_pcap_init(void)
207{
208 return platform_driver_probe(&pcap_rtc_driver, pcap_rtc_probe);
209}
210
211static void __exit rtc_pcap_exit(void)
212{
213 platform_driver_unregister(&pcap_rtc_driver);
214}
215
216module_init(rtc_pcap_init);
217module_exit(rtc_pcap_exit);
218
219MODULE_DESCRIPTION("Motorola pcap rtc driver");
220MODULE_AUTHOR("guiming zhuo <gmzhuo@gmail.com>");
221MODULE_LICENSE("GPL");