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-rw-r--r--arch/arm/mach-integrator/Makefile2
-rw-r--r--arch/arm/mach-integrator/time.c223
-rw-r--r--drivers/rtc/Kconfig10
-rw-r--r--drivers/rtc/Makefile1
-rw-r--r--drivers/rtc/rtc-pl030.c217
5 files changed, 229 insertions, 224 deletions
diff --git a/arch/arm/mach-integrator/Makefile b/arch/arm/mach-integrator/Makefile
index 158daaf9e3b0..6a5ef8d30b10 100644
--- a/arch/arm/mach-integrator/Makefile
+++ b/arch/arm/mach-integrator/Makefile
@@ -4,7 +4,7 @@
4 4
5# Object file lists. 5# Object file lists.
6 6
7obj-y := clock.o core.o lm.o time.o 7obj-y := clock.o core.o lm.o
8obj-$(CONFIG_ARCH_INTEGRATOR_AP) += integrator_ap.o 8obj-$(CONFIG_ARCH_INTEGRATOR_AP) += integrator_ap.o
9obj-$(CONFIG_ARCH_INTEGRATOR_CP) += integrator_cp.o 9obj-$(CONFIG_ARCH_INTEGRATOR_CP) += integrator_cp.o
10 10
diff --git a/arch/arm/mach-integrator/time.c b/arch/arm/mach-integrator/time.c
deleted file mode 100644
index 8508a0db3eaf..000000000000
--- a/arch/arm/mach-integrator/time.c
+++ /dev/null
@@ -1,223 +0,0 @@
1/*
2 * linux/arch/arm/mach-integrator/time.c
3 *
4 * Copyright (C) 2000-2001 Deep Blue Solutions Ltd.
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#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/time.h>
13#include <linux/mc146818rtc.h>
14#include <linux/interrupt.h>
15#include <linux/init.h>
16#include <linux/device.h>
17#include <linux/amba/bus.h>
18
19#include <asm/hardware.h>
20#include <asm/io.h>
21#include <asm/uaccess.h>
22#include <asm/rtc.h>
23
24#include <asm/mach/time.h>
25
26#define RTC_DR (0)
27#define RTC_MR (4)
28#define RTC_STAT (8)
29#define RTC_EOI (8)
30#define RTC_LR (12)
31#define RTC_CR (16)
32#define RTC_CR_MIE (1 << 0)
33
34extern int (*set_rtc)(void);
35static void __iomem *rtc_base;
36
37static int integrator_set_rtc(void)
38{
39 __raw_writel(xtime.tv_sec, rtc_base + RTC_LR);
40 return 1;
41}
42
43static int integrator_rtc_read_alarm(struct rtc_wkalrm *alrm)
44{
45 rtc_time_to_tm(readl(rtc_base + RTC_MR), &alrm->time);
46 return 0;
47}
48
49static inline int integrator_rtc_set_alarm(struct rtc_wkalrm *alrm)
50{
51 unsigned long time;
52 int ret;
53
54 /*
55 * At the moment, we can only deal with non-wildcarded alarm times.
56 */
57 ret = rtc_valid_tm(&alrm->time);
58 if (ret == 0)
59 ret = rtc_tm_to_time(&alrm->time, &time);
60 if (ret == 0)
61 writel(time, rtc_base + RTC_MR);
62 return ret;
63}
64
65static int integrator_rtc_read_time(struct rtc_time *tm)
66{
67 rtc_time_to_tm(readl(rtc_base + RTC_DR), tm);
68 return 0;
69}
70
71/*
72 * Set the RTC time. Unfortunately, we can't accurately set
73 * the point at which the counter updates.
74 *
75 * Also, since RTC_LR is transferred to RTC_CR on next rising
76 * edge of the 1Hz clock, we must write the time one second
77 * in advance.
78 */
79static inline int integrator_rtc_set_time(struct rtc_time *tm)
80{
81 unsigned long time;
82 int ret;
83
84 ret = rtc_tm_to_time(tm, &time);
85 if (ret == 0)
86 writel(time + 1, rtc_base + RTC_LR);
87
88 return ret;
89}
90
91static struct rtc_ops rtc_ops = {
92 .owner = THIS_MODULE,
93 .read_time = integrator_rtc_read_time,
94 .set_time = integrator_rtc_set_time,
95 .read_alarm = integrator_rtc_read_alarm,
96 .set_alarm = integrator_rtc_set_alarm,
97};
98
99static irqreturn_t arm_rtc_interrupt(int irq, void *dev_id)
100{
101 writel(0, rtc_base + RTC_EOI);
102 return IRQ_HANDLED;
103}
104
105static int rtc_probe(struct amba_device *dev, void *id)
106{
107 int ret;
108
109 if (rtc_base)
110 return -EBUSY;
111
112 ret = amba_request_regions(dev, NULL);
113 if (ret)
114 goto out;
115
116 rtc_base = ioremap(dev->res.start, SZ_4K);
117 if (!rtc_base) {
118 ret = -ENOMEM;
119 goto res_out;
120 }
121
122 __raw_writel(0, rtc_base + RTC_CR);
123 __raw_writel(0, rtc_base + RTC_EOI);
124
125 xtime.tv_sec = __raw_readl(rtc_base + RTC_DR);
126
127 /* note that 'dev' is merely used for irq disambiguation;
128 * it is not actually referenced in the irq handler
129 */
130 ret = request_irq(dev->irq[0], arm_rtc_interrupt, IRQF_DISABLED,
131 "rtc-pl030", dev);
132 if (ret)
133 goto map_out;
134
135 ret = register_rtc(&rtc_ops);
136 if (ret)
137 goto irq_out;
138
139 set_rtc = integrator_set_rtc;
140 return 0;
141
142 irq_out:
143 free_irq(dev->irq[0], dev);
144 map_out:
145 iounmap(rtc_base);
146 rtc_base = NULL;
147 res_out:
148 amba_release_regions(dev);
149 out:
150 return ret;
151}
152
153static int rtc_remove(struct amba_device *dev)
154{
155 set_rtc = NULL;
156
157 writel(0, rtc_base + RTC_CR);
158
159 free_irq(dev->irq[0], dev);
160 unregister_rtc(&rtc_ops);
161
162 iounmap(rtc_base);
163 rtc_base = NULL;
164 amba_release_regions(dev);
165
166 return 0;
167}
168
169static struct timespec rtc_delta;
170
171static int rtc_suspend(struct amba_device *dev, pm_message_t state)
172{
173 struct timespec rtc;
174
175 rtc.tv_sec = readl(rtc_base + RTC_DR);
176 rtc.tv_nsec = 0;
177 save_time_delta(&rtc_delta, &rtc);
178
179 return 0;
180}
181
182static int rtc_resume(struct amba_device *dev)
183{
184 struct timespec rtc;
185
186 rtc.tv_sec = readl(rtc_base + RTC_DR);
187 rtc.tv_nsec = 0;
188 restore_time_delta(&rtc_delta, &rtc);
189
190 return 0;
191}
192
193static struct amba_id rtc_ids[] = {
194 {
195 .id = 0x00041030,
196 .mask = 0x000fffff,
197 },
198 { 0, 0 },
199};
200
201static struct amba_driver rtc_driver = {
202 .drv = {
203 .name = "rtc-pl030",
204 },
205 .probe = rtc_probe,
206 .remove = rtc_remove,
207 .suspend = rtc_suspend,
208 .resume = rtc_resume,
209 .id_table = rtc_ids,
210};
211
212static int __init integrator_rtc_init(void)
213{
214 return amba_driver_register(&rtc_driver);
215}
216
217static void __exit integrator_rtc_exit(void)
218{
219 amba_driver_unregister(&rtc_driver);
220}
221
222module_init(integrator_rtc_init);
223module_exit(integrator_rtc_exit);
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 6cc2c0330230..1b26eeb52c97 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -458,6 +458,16 @@ config RTC_DRV_VR41XX
458 To compile this driver as a module, choose M here: the 458 To compile this driver as a module, choose M here: the
459 module will be called rtc-vr41xx. 459 module will be called rtc-vr41xx.
460 460
461config RTC_DRV_PL030
462 tristate "ARM AMBA PL030 RTC"
463 depends on ARM_AMBA
464 help
465 If you say Y here you will get access to ARM AMBA
466 PrimeCell PL030 RTC found on certain ARM SOCs.
467
468 To compile this driver as a module, choose M here: the
469 module will be called rtc-pl030.
470
461config RTC_DRV_PL031 471config RTC_DRV_PL031
462 tristate "ARM AMBA PL031 RTC" 472 tristate "ARM AMBA PL031 RTC"
463 depends on ARM_AMBA 473 depends on ARM_AMBA
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 872f1218ff9f..af3ee6652ce5 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
40obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o 40obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o
41obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o 41obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o
42obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o 42obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o
43obj-$(CONFIG_RTC_DRV_PL030) += rtc-pl030.o
43obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o 44obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o
44obj-$(CONFIG_RTC_DRV_R9701) += rtc-r9701.o 45obj-$(CONFIG_RTC_DRV_R9701) += rtc-r9701.o
45obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o 46obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c
new file mode 100644
index 000000000000..8448eeb9d675
--- /dev/null
+++ b/drivers/rtc/rtc-pl030.c
@@ -0,0 +1,217 @@
1/*
2 * linux/drivers/rtc/rtc-pl030.c
3 *
4 * Copyright (C) 2000-2001 Deep Blue Solutions Ltd.
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#include <linux/module.h>
11#include <linux/rtc.h>
12#include <linux/init.h>
13#include <linux/interrupt.h>
14#include <linux/amba/bus.h>
15#include <linux/io.h>
16
17#define RTC_DR (0)
18#define RTC_MR (4)
19#define RTC_STAT (8)
20#define RTC_EOI (8)
21#define RTC_LR (12)
22#define RTC_CR (16)
23#define RTC_CR_MIE (1 << 0)
24
25struct pl030_rtc {
26 struct rtc_device *rtc;
27 void __iomem *base;
28};
29
30static irqreturn_t pl030_interrupt(int irq, void *dev_id)
31{
32 struct pl030_rtc *rtc = dev_id;
33 writel(0, rtc->base + RTC_EOI);
34 return IRQ_HANDLED;
35}
36
37static int pl030_open(struct device *dev)
38{
39 return 0;
40}
41
42static void pl030_release(struct device *dev)
43{
44}
45
46static int pl030_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
47{
48 return -ENOIOCTLCMD;
49}
50
51static int pl030_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
52{
53 struct pl030_rtc *rtc = dev_get_drvdata(dev);
54
55 rtc_time_to_tm(readl(rtc->base + RTC_MR), &alrm->time);
56 return 0;
57}
58
59static int pl030_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
60{
61 struct pl030_rtc *rtc = dev_get_drvdata(dev);
62 unsigned long time;
63 int ret;
64
65 /*
66 * At the moment, we can only deal with non-wildcarded alarm times.
67 */
68 ret = rtc_valid_tm(&alrm->time);
69 if (ret == 0)
70 ret = rtc_tm_to_time(&alrm->time, &time);
71 if (ret == 0)
72 writel(time, rtc->base + RTC_MR);
73 return ret;
74}
75
76static int pl030_read_time(struct device *dev, struct rtc_time *tm)
77{
78 struct pl030_rtc *rtc = dev_get_drvdata(dev);
79
80 rtc_time_to_tm(readl(rtc->base + RTC_DR), tm);
81
82 return 0;
83}
84
85/*
86 * Set the RTC time. Unfortunately, we can't accurately set
87 * the point at which the counter updates.
88 *
89 * Also, since RTC_LR is transferred to RTC_CR on next rising
90 * edge of the 1Hz clock, we must write the time one second
91 * in advance.
92 */
93static int pl030_set_time(struct device *dev, struct rtc_time *tm)
94{
95 struct pl030_rtc *rtc = dev_get_drvdata(dev);
96 unsigned long time;
97 int ret;
98
99 ret = rtc_tm_to_time(tm, &time);
100 if (ret == 0)
101 writel(time + 1, rtc->base + RTC_LR);
102
103 return ret;
104}
105
106static const struct rtc_class_ops pl030_ops = {
107 .open = pl030_open,
108 .release = pl030_release,
109 .ioctl = pl030_ioctl,
110 .read_time = pl030_read_time,
111 .set_time = pl030_set_time,
112 .read_alarm = pl030_read_alarm,
113 .set_alarm = pl030_set_alarm,
114};
115
116static int pl030_probe(struct amba_device *dev, void *id)
117{
118 struct pl030_rtc *rtc;
119 int ret;
120
121 ret = amba_request_regions(dev, NULL);
122 if (ret)
123 goto err_req;
124
125 rtc = kmalloc(sizeof(*rtc), GFP_KERNEL);
126 if (!rtc) {
127 ret = -ENOMEM;
128 goto err_rtc;
129 }
130
131 rtc->base = ioremap(dev->res.start, SZ_4K);
132 if (!rtc->base) {
133 ret = -ENOMEM;
134 goto err_map;
135 }
136
137 __raw_writel(0, rtc->base + RTC_CR);
138 __raw_writel(0, rtc->base + RTC_EOI);
139
140 amba_set_drvdata(dev, rtc);
141
142 ret = request_irq(dev->irq[0], pl030_interrupt, IRQF_DISABLED,
143 "rtc-pl030", rtc);
144 if (ret)
145 goto err_irq;
146
147 rtc->rtc = rtc_device_register("pl030", &dev->dev, &pl030_ops,
148 THIS_MODULE);
149 if (IS_ERR(rtc->rtc)) {
150 ret = PTR_ERR(rtc->rtc);
151 goto err_reg;
152 }
153
154 return 0;
155
156 err_reg:
157 free_irq(dev->irq[0], rtc);
158 err_irq:
159 iounmap(rtc->base);
160 err_map:
161 kfree(rtc);
162 err_rtc:
163 amba_release_regions(dev);
164 err_req:
165 return ret;
166}
167
168static int pl030_remove(struct amba_device *dev)
169{
170 struct pl030_rtc *rtc = amba_get_drvdata(dev);
171
172 amba_set_drvdata(dev, NULL);
173
174 writel(0, rtc->base + RTC_CR);
175
176 free_irq(dev->irq[0], rtc);
177 rtc_device_unregister(rtc->rtc);
178 iounmap(rtc->base);
179 kfree(rtc);
180 amba_release_regions(dev);
181
182 return 0;
183}
184
185static struct amba_id pl030_ids[] = {
186 {
187 .id = 0x00041030,
188 .mask = 0x000fffff,
189 },
190 { 0, 0 },
191};
192
193static struct amba_driver pl030_driver = {
194 .drv = {
195 .name = "rtc-pl030",
196 },
197 .probe = pl030_probe,
198 .remove = pl030_remove,
199 .id_table = pl030_ids,
200};
201
202static int __init pl030_init(void)
203{
204 return amba_driver_register(&pl030_driver);
205}
206
207static void __exit pl030_exit(void)
208{
209 amba_driver_unregister(&pl030_driver);
210}
211
212module_init(pl030_init);
213module_exit(pl030_exit);
214
215MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
216MODULE_DESCRIPTION("ARM AMBA PL030 RTC Driver");
217MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-27 21:07:16 -0500