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rtc: s3c: add s3c_rtc_data structure to use variant data instead of s3c_cpu_type 

Add s3c_rtc_data structure to variant data according to SoC type.  The
s3c_rtc_data structure includes some functions to control RTC operation
and specific data dependent on SoC type.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Chanwoo Choi 2014-10-13 15:52:33 -07:00 committed by Linus Torvalds
parent d67288da51
commit ae05c95074
1 changed files with 297 additions and 180 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

477
drivers/rtc/rtc-s3c.c
View File

@ -32,17 +32,6 @@
#include <asm/irq.h>
#include "rtc-s3c.h"
enum s3c_cpu_type {
TYPE_S3C2410,
TYPE_S3C2416,
TYPE_S3C2443,
TYPE_S3C64XX,
};
struct s3c_rtc_drv_data {
int cpu_type;
};
struct s3c_rtc {
struct device *dev;
struct rtc_device *rtc;
@ -51,7 +40,7 @@ struct s3c_rtc {
struct clk *rtc_clk;
bool enabled;
enum s3c_cpu_type cpu_type;
struct s3c_rtc_data *data;
int irq_alarm;
int irq_tick;
@ -63,6 +52,19 @@ struct s3c_rtc {
bool wake_en;
};
struct s3c_rtc_data {
int max_user_freq;
void (*irq_handler) (struct s3c_rtc *info, int mask);
void (*set_freq) (struct s3c_rtc *info, int freq);
void (*enable_tick) (struct s3c_rtc *info, struct seq_file *seq);
void (*select_tick_clk) (struct s3c_rtc *info);
void (*save_tick_cnt) (struct s3c_rtc *info);
void (*restore_tick_cnt) (struct s3c_rtc *info);
void (*enable) (struct s3c_rtc *info);
void (*disable) (struct s3c_rtc *info);
};
static void s3c_rtc_alarm_clk_enable(struct s3c_rtc *info, bool enable)
{
unsigned long irq_flags;
@ -83,34 +85,22 @@ static void s3c_rtc_alarm_clk_enable(struct s3c_rtc *info, bool enable)
}
/* IRQ Handlers */
static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
{
struct s3c_rtc *info = (struct s3c_rtc *)id;
clk_enable(info->rtc_clk);
rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
if (info->cpu_type == TYPE_S3C64XX)
writeb(S3C2410_INTP_ALM, info->base + S3C2410_INTP);
clk_disable(info->rtc_clk);
s3c_rtc_alarm_clk_enable(info, false);
return IRQ_HANDLED;
}
static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
{
struct s3c_rtc *info = (struct s3c_rtc *)id;
clk_enable(info->rtc_clk);
rtc_update_irq(info->rtc, 1, RTC_PF | RTC_IRQF);
if (info->data->irq_handler)
info->data->irq_handler(info, S3C2410_INTP_TIC);
if (info->cpu_type == TYPE_S3C64XX)
writeb(S3C2410_INTP_TIC, info->base + S3C2410_INTP);
return IRQ_HANDLED;
}
clk_disable(info->rtc_clk);
static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
{
struct s3c_rtc *info = (struct s3c_rtc *)id;
if (info->data->irq_handler)
info->data->irq_handler(info, S3C2410_INTP_ALM);
return IRQ_HANDLED;
}
@ -137,36 +127,18 @@ static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
return 0;
}
/* Set RTC frequency */
static int s3c_rtc_setfreq(struct s3c_rtc *info, int freq)
{
unsigned int tmp = 0;
int val;
if (!is_power_of_2(freq))
return -EINVAL;
clk_enable(info->rtc_clk);
spin_lock_irq(&info->pie_lock);
if (info->cpu_type != TYPE_S3C64XX) {
tmp = readb(info->base + S3C2410_TICNT);
tmp &= S3C2410_TICNT_ENABLE;
}
if (info->data->set_freq)
info->data->set_freq(info, freq);
val = (info->rtc->max_user_freq / freq) - 1;
if (info->cpu_type == TYPE_S3C2416 || info->cpu_type == TYPE_S3C2443) {
tmp |= S3C2443_TICNT_PART(val);
writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
if (info->cpu_type == TYPE_S3C2416)
writel(S3C2416_TICNT2_PART(val),
info->base + S3C2416_TICNT2);
} else {
tmp |= val;
}
writel(tmp, info->base + S3C2410_TICNT);
spin_unlock_irq(&info->pie_lock);
clk_disable(info->rtc_clk);
@ -174,7 +146,6 @@ static int s3c_rtc_setfreq(struct s3c_rtc *info, int freq)
}
/* Time read/write */
static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
{
struct s3c_rtc *info = dev_get_drvdata(dev);
@ -355,19 +326,14 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
{
struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int ticnt;
clk_enable(info->rtc_clk);
if (info->cpu_type == TYPE_S3C64XX) {
ticnt = readw(info->base + S3C2410_RTCCON);
ticnt &= S3C64XX_RTCCON_TICEN;
} else {
ticnt = readb(info->base + S3C2410_TICNT);
ticnt &= S3C2410_TICNT_ENABLE;
}
seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
if (info->data->enable_tick)
info->data->enable_tick(info, seq);
clk_disable(info->rtc_clk);
return 0;
}
@ -380,50 +346,69 @@ static const struct rtc_class_ops s3c_rtcops = {
.alarm_irq_enable = s3c_rtc_setaie,
};
static void s3c_rtc_enable(struct s3c_rtc *info, int en)
static void s3c24xx_rtc_enable(struct s3c_rtc *info)
{
unsigned int con, tmp;
clk_enable(info->rtc_clk);
con = readw(info->base + S3C2410_RTCCON);
if (!en) {
if (info->cpu_type == TYPE_S3C64XX)
con &= ~S3C64XX_RTCCON_TICEN;
con &= ~S3C2410_RTCCON_RTCEN;
writew(con, info->base + S3C2410_RTCCON);
/* re-enable the device, and check it is ok */
if ((con & S3C2410_RTCCON_RTCEN) == 0) {
dev_info(info->dev, "rtc disabled, re-enabling\n");
if (info->cpu_type != TYPE_S3C64XX) {
con = readb(info->base + S3C2410_TICNT);
con &= ~S3C2410_TICNT_ENABLE;
writeb(con, info->base + S3C2410_TICNT);
}
} else {
/* re-enable the device, and check it is ok */
if ((con & S3C2410_RTCCON_RTCEN) == 0) {
dev_info(info->dev, "rtc disabled, re-enabling\n");
tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp | S3C2410_RTCCON_RTCEN,
info->base + S3C2410_RTCCON);
}
if (con & S3C2410_RTCCON_CNTSEL) {
dev_info(info->dev, "removing RTCCON_CNTSEL\n");
tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp & ~S3C2410_RTCCON_CNTSEL,
info->base + S3C2410_RTCCON);
}
if (con & S3C2410_RTCCON_CLKRST) {
dev_info(info->dev, "removing RTCCON_CLKRST\n");
tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp & ~S3C2410_RTCCON_CLKRST,
info->base + S3C2410_RTCCON);
}
tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp | S3C2410_RTCCON_RTCEN,
info->base + S3C2410_RTCCON);
}
if (con & S3C2410_RTCCON_CNTSEL) {
dev_info(info->dev, "removing RTCCON_CNTSEL\n");
tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp & ~S3C2410_RTCCON_CNTSEL,
info->base + S3C2410_RTCCON);
}
if (con & S3C2410_RTCCON_CLKRST) {
dev_info(info->dev, "removing RTCCON_CLKRST\n");
tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp & ~S3C2410_RTCCON_CLKRST,
info->base + S3C2410_RTCCON);
}
clk_disable(info->rtc_clk);
}
static void s3c24xx_rtc_disable(struct s3c_rtc *info)
{
unsigned int con;
clk_enable(info->rtc_clk);
con = readw(info->base + S3C2410_RTCCON);
con &= ~S3C2410_RTCCON_RTCEN;
writew(con, info->base + S3C2410_RTCCON);
con = readb(info->base + S3C2410_TICNT);
con &= ~S3C2410_TICNT_ENABLE;
writeb(con, info->base + S3C2410_TICNT);
clk_disable(info->rtc_clk);
}
static void s3c6410_rtc_disable(struct s3c_rtc *info)
{
unsigned int con;
clk_enable(info->rtc_clk);
con = readw(info->base + S3C2410_RTCCON);
con &= ~S3C64XX_RTCCON_TICEN;
con &= ~S3C2410_RTCCON_RTCEN;
writew(con, info->base + S3C2410_RTCCON);
clk_disable(info->rtc_clk);
}
@ -441,20 +426,12 @@ static int s3c_rtc_remove(struct platform_device *pdev)
static const struct of_device_id s3c_rtc_dt_match[];
static inline int s3c_rtc_get_driver_data(struct platform_device *pdev)
static struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev)
{
#ifdef CONFIG_OF
struct s3c_rtc_drv_data *data;
const struct of_device_id *match;
if (pdev->dev.of_node) {
const struct of_device_id *match;
match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
data = (struct s3c_rtc_drv_data *) match->data;
return data->cpu_type;
}
#endif
return platform_get_device_id(pdev)->driver_data;
match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
return (struct s3c_rtc_data *)match->data;
}
static int s3c_rtc_probe(struct platform_device *pdev)
@ -463,7 +440,6 @@ static int s3c_rtc_probe(struct platform_device *pdev)
struct rtc_time rtc_tm;
struct resource *res;
int ret;
int tmp;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
@ -477,7 +453,11 @@ static int s3c_rtc_probe(struct platform_device *pdev)
}
info->dev = &pdev->dev;
info->cpu_type = s3c_rtc_get_driver_data(pdev);
info->data = s3c_rtc_get_data(pdev);
if (!info->data) {
dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
return -EINVAL;
}
spin_lock_init(&info->pie_lock);
spin_lock_init(&info->alarm_clk_lock);
@ -506,7 +486,8 @@ static int s3c_rtc_probe(struct platform_device *pdev)
clk_prepare_enable(info->rtc_clk);
/* check to see if everything is setup correctly */
s3c_rtc_enable(info, 1);
if (info->data->enable)
info->data->enable(info);
dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
readw(info->base + S3C2410_RTCCON));
@ -552,16 +533,8 @@ static int s3c_rtc_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
}
if (info->cpu_type != TYPE_S3C2410)
info->rtc->max_user_freq = 32768;
else
info->rtc->max_user_freq = 128;
if (info->cpu_type == TYPE_S3C2416 || info->cpu_type == TYPE_S3C2443) {
tmp = readw(info->base + S3C2410_RTCCON);
tmp |= S3C2443_RTCCON_TICSEL;
writew(tmp, info->base + S3C2410_RTCCON);
}
if (info->data->select_tick_clk)
info->data->select_tick_clk(info);
s3c_rtc_setfreq(info, 1);
@ -570,7 +543,8 @@ static int s3c_rtc_probe(struct platform_device *pdev)
return 0;
err_nortc:
s3c_rtc_enable(info, 0);
if (info->data->disable)
info->data->disable(info);
clk_disable_unprepare(info->rtc_clk);
return ret;
@ -583,15 +557,13 @@ static int s3c_rtc_suspend(struct device *dev)
struct s3c_rtc *info = dev_get_drvdata(dev);
clk_enable(info->rtc_clk);
/* save TICNT for anyone using periodic interrupts */
if (info->cpu_type == TYPE_S3C64XX) {
info->ticnt_en_save = readw(info->base + S3C2410_RTCCON);
info->ticnt_en_save &= S3C64XX_RTCCON_TICEN;
info->ticnt_save = readl(info->base + S3C2410_TICNT);
} else {
info->ticnt_save = readb(info->base + S3C2410_TICNT);
}
s3c_rtc_enable(info, 0);
if (info->data->save_tick_cnt)
info->data->save_tick_cnt(info);
if (info->data->disable)
info->data->disable(info);
if (device_may_wakeup(dev) && !info->wake_en) {
if (enable_irq_wake(info->irq_alarm) == 0)
@ -599,6 +571,7 @@ static int s3c_rtc_suspend(struct device *dev)
else
dev_err(dev, "enable_irq_wake failed\n");
}
clk_disable(info->rtc_clk);
return 0;
@ -607,25 +580,20 @@ static int s3c_rtc_suspend(struct device *dev)
static int s3c_rtc_resume(struct device *dev)
{
struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int tmp;
clk_enable(info->rtc_clk);
s3c_rtc_enable(info, 1);
if (info->cpu_type == TYPE_S3C64XX) {
writel(info->ticnt_save, info->base + S3C2410_TICNT);
if (info->ticnt_en_save) {
tmp = readw(info->base + S3C2410_RTCCON);
writew(tmp | info->ticnt_en_save,
info->base + S3C2410_RTCCON);
}
} else {
writeb(info->ticnt_save, info->base + S3C2410_TICNT);
}
if (info->data->enable)
info->data->enable(info);
if (info->data->restore_tick_cnt)
info->data->restore_tick_cnt(info);
if (device_may_wakeup(dev) && info->wake_en) {
disable_irq_wake(info->irq_alarm);
info->wake_en = false;
}
clk_disable(info->rtc_clk);
return 0;
@ -633,56 +601,206 @@ static int s3c_rtc_resume(struct device *dev)
#endif
static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
#ifdef CONFIG_OF
static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = {
[TYPE_S3C2410] = { TYPE_S3C2410 },
[TYPE_S3C2416] = { TYPE_S3C2416 },
[TYPE_S3C2443] = { TYPE_S3C2443 },
[TYPE_S3C64XX] = { TYPE_S3C64XX },
static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
{
clk_enable(info->rtc_clk);
rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
clk_disable(info->rtc_clk);
s3c_rtc_alarm_clk_enable(info, false);
}
static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
{
clk_enable(info->rtc_clk);
rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
writeb(mask, info->base + S3C2410_INTP);
clk_disable(info->rtc_clk);
s3c_rtc_alarm_clk_enable(info, false);
}
static void s3c2410_rtc_setfreq(struct s3c_rtc *info, int freq)
{
unsigned int tmp = 0;
int val;
tmp = readb(info->base + S3C2410_TICNT);
tmp &= S3C2410_TICNT_ENABLE;
val = (info->rtc->max_user_freq / freq) - 1;
tmp |= val;
writel(tmp, info->base + S3C2410_TICNT);
}
static void s3c2416_rtc_setfreq(struct s3c_rtc *info, int freq)
{
unsigned int tmp = 0;
int val;
tmp = readb(info->base + S3C2410_TICNT);
tmp &= S3C2410_TICNT_ENABLE;
val = (info->rtc->max_user_freq / freq) - 1;
tmp |= S3C2443_TICNT_PART(val);
writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2);
writel(tmp, info->base + S3C2410_TICNT);
}
static void s3c2443_rtc_setfreq(struct s3c_rtc *info, int freq)
{
unsigned int tmp = 0;
int val;
tmp = readb(info->base + S3C2410_TICNT);
tmp &= S3C2410_TICNT_ENABLE;
val = (info->rtc->max_user_freq / freq) - 1;
tmp |= S3C2443_TICNT_PART(val);
writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
writel(tmp, info->base + S3C2410_TICNT);
}
static void s3c6410_rtc_setfreq(struct s3c_rtc *info, int freq)
{
int val;
val = (info->rtc->max_user_freq / freq) - 1;
writel(val, info->base + S3C2410_TICNT);
}
static void s3c24xx_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
{
unsigned int ticnt;
ticnt = readb(info->base + S3C2410_TICNT);
ticnt &= S3C2410_TICNT_ENABLE;
seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
}
static void s3c2416_rtc_select_tick_clk(struct s3c_rtc *info)
{
unsigned int con;
con = readw(info->base + S3C2410_RTCCON);
con |= S3C2443_RTCCON_TICSEL;
writew(con, info->base + S3C2410_RTCCON);
}
static void s3c6410_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
{
unsigned int ticnt;
ticnt = readw(info->base + S3C2410_RTCCON);
ticnt &= S3C64XX_RTCCON_TICEN;
seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
}
static void s3c24xx_rtc_save_tick_cnt(struct s3c_rtc *info)
{
info->ticnt_save = readb(info->base + S3C2410_TICNT);
}
static void s3c24xx_rtc_restore_tick_cnt(struct s3c_rtc *info)
{
writeb(info->ticnt_save, info->base + S3C2410_TICNT);
}
static void s3c6410_rtc_save_tick_cnt(struct s3c_rtc *info)
{
info->ticnt_en_save = readw(info->base + S3C2410_RTCCON);
info->ticnt_en_save &= S3C64XX_RTCCON_TICEN;
info->ticnt_save = readl(info->base + S3C2410_TICNT);
}
static void s3c6410_rtc_restore_tick_cnt(struct s3c_rtc *info)
{
unsigned int con;
writel(info->ticnt_save, info->base + S3C2410_TICNT);
if (info->ticnt_en_save) {
con = readw(info->base + S3C2410_RTCCON);
writew(con | info->ticnt_en_save,
info->base + S3C2410_RTCCON);
}
}
static struct s3c_rtc_data const s3c2410_rtc_data = {
.max_user_freq = 128,
.irq_handler = s3c24xx_rtc_irq,
.set_freq = s3c2410_rtc_setfreq,
.enable_tick = s3c24xx_rtc_enable_tick,
.save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
.restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
.enable = s3c24xx_rtc_enable,
.disable = s3c24xx_rtc_disable,
};
static struct s3c_rtc_data const s3c2416_rtc_data = {
.max_user_freq = 32768,
.irq_handler = s3c24xx_rtc_irq,
.set_freq = s3c2416_rtc_setfreq,
.enable_tick = s3c24xx_rtc_enable_tick,
.select_tick_clk = s3c2416_rtc_select_tick_clk,
.save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
.restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
.enable = s3c24xx_rtc_enable,
.disable = s3c24xx_rtc_disable,
};
static struct s3c_rtc_data const s3c2443_rtc_data = {
.max_user_freq = 32768,
.irq_handler = s3c24xx_rtc_irq,
.set_freq = s3c2443_rtc_setfreq,
.enable_tick = s3c24xx_rtc_enable_tick,
.select_tick_clk = s3c2416_rtc_select_tick_clk,
.save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
.restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
.enable = s3c24xx_rtc_enable,
.disable = s3c24xx_rtc_disable,
};
static struct s3c_rtc_data const s3c6410_rtc_data = {
.max_user_freq = 32768,
.irq_handler = s3c6410_rtc_irq,
.set_freq = s3c6410_rtc_setfreq,
.enable_tick = s3c6410_rtc_enable_tick,
.save_tick_cnt = s3c6410_rtc_save_tick_cnt,
.restore_tick_cnt = s3c6410_rtc_restore_tick_cnt,
.enable = s3c24xx_rtc_enable,
.disable = s3c6410_rtc_disable,
};
static const struct of_device_id s3c_rtc_dt_match[] = {
{
.compatible = "samsung,s3c2410-rtc",
.data = &s3c_rtc_drv_data_array[TYPE_S3C2410],
.data = (void *)&s3c2410_rtc_data,
}, {
.compatible = "samsung,s3c2416-rtc",
.data = &s3c_rtc_drv_data_array[TYPE_S3C2416],
.data = (void *)&s3c2416_rtc_data,
}, {
.compatible = "samsung,s3c2443-rtc",
.data = &s3c_rtc_drv_data_array[TYPE_S3C2443],
.data = (void *)&s3c2443_rtc_data,
}, {
.compatible = "samsung,s3c6410-rtc",
.data = &s3c_rtc_drv_data_array[TYPE_S3C64XX],
.data = (void *)&s3c6410_rtc_data,
},
{},
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
#endif
static struct platform_device_id s3c_rtc_driver_ids[] = {
{
.name = "s3c2410-rtc",
.driver_data = TYPE_S3C2410,
}, {
.name = "s3c2416-rtc",
.driver_data = TYPE_S3C2416,
}, {
.name = "s3c2443-rtc",
.driver_data = TYPE_S3C2443,
}, {
.name = "s3c64xx-rtc",
.driver_data = TYPE_S3C64XX,
},
{ }
};
MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
static struct platform_driver s3c_rtc_driver = {
.probe = s3c_rtc_probe,
.remove = s3c_rtc_remove,
.id_table = s3c_rtc_driver_ids,
.driver = {
.name = "s3c-rtc",
.owner = THIS_MODULE,
@ -690,7 +808,6 @@ static struct platform_driver s3c_rtc_driver = {
.of_match_table = of_match_ptr(s3c_rtc_dt_match),
},
};
module_platform_driver(s3c_rtc_driver);
MODULE_DESCRIPTION("Samsung S3C RTC Driver");