static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
struct sh_rtc *rtc = dev_get_drvdata(dev);
unsigned int ret = 0;
switch (cmd) {
case RTC_PIE_OFF:
case RTC_PIE_ON:
sh_rtc_setpie(dev, cmd == RTC_PIE_ON);
break;
case RTC_AIE_OFF:
case RTC_AIE_ON:
sh_rtc_setaie(dev, cmd == RTC_AIE_ON);
break;
case RTC_UIE_OFF:
rtc->periodic_freq &= ~PF_OXS;
sh_rtc_setcie(dev, 0);
break;
case RTC_UIE_ON:
rtc->periodic_freq |= PF_OXS;
sh_rtc_setcie(dev, 1);
break;
case RTC_IRQP_READ:
ret = put_user(rtc->rtc_dev->irq_freq,
(unsigned long __user *)arg);
break;
case RTC_IRQP_SET:
ret = sh_rtc_setfreq(dev, arg);
break;
default:
ret = -ENOIOCTLCMD;
}
return ret;
}
static int sh_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
struct sh_rtc *rtc = dev_get_drvdata(dev);
unsigned int ret = 0;
switch (cmd) {
case RTC_AIE_OFF:
case RTC_AIE_ON:
sh_rtc_setaie(dev, cmd == RTC_AIE_ON);
break;
case RTC_UIE_OFF:
rtc->periodic_freq &= ~PF_OXS;
sh_rtc_setcie(dev, 0);
break;
case RTC_UIE_ON:
rtc->periodic_freq |= PF_OXS;
sh_rtc_setcie(dev, 1);
break;
default:
ret = -ENOIOCTLCMD;
}
return ret;
}
static int __init sh_rtc_probe(struct platform_device *pdev)
{
struct sh_rtc *rtc;
struct resource *res;
struct rtc_time r;
char clk_name[6];
int clk_id, ret;
rtc = kzalloc(sizeof(struct sh_rtc), GFP_KERNEL);
if (unlikely(!rtc))
return -ENOMEM;
spin_lock_init(&rtc->lock);
/* get periodic/carry/alarm irqs */
ret = platform_get_irq(pdev, 0);
if (unlikely(ret <= 0)) {
ret = -ENOENT;
dev_err(&pdev->dev, "No IRQ resource\n");
goto err_badres;
}
rtc->periodic_irq = ret;
rtc->carry_irq = platform_get_irq(pdev, 1);
rtc->alarm_irq = platform_get_irq(pdev, 2);
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (unlikely(res == NULL)) {
ret = -ENOENT;
dev_err(&pdev->dev, "No IO resource\n");
goto err_badres;
}
rtc->regsize = resource_size(res);
rtc->res = request_mem_region(res->start, rtc->regsize, pdev->name);
if (unlikely(!rtc->res)) {
ret = -EBUSY;
goto err_badres;
}
rtc->regbase = ioremap_nocache(rtc->res->start, rtc->regsize);
if (unlikely(!rtc->regbase)) {
ret = -EINVAL;
goto err_badmap;
}
clk_id = pdev->id;
/* With a single device, the clock id is still "rtc0" */
if (clk_id < 0)
clk_id = 0;
snprintf(clk_name, sizeof(clk_name), "rtc%d", clk_id);
rtc->clk = clk_get(&pdev->dev, clk_name);
if (IS_ERR(rtc->clk)) {
/*
* No error handling for rtc->clk intentionally, not all
* platforms will have a unique clock for the RTC, and
* the clk API can handle the struct clk pointer being
* NULL.
*/
rtc->clk = NULL;
}
clk_enable(rtc->clk);
rtc->capabilities = RTC_DEF_CAPABILITIES;
if (pdev->dev.platform_data) {
struct sh_rtc_platform_info *pinfo = pdev->dev.platform_data;
/*
* Some CPUs have special capabilities in addition to the
* default set. Add those in here.
*/
rtc->capabilities |= pinfo->capabilities;
}
if (rtc->carry_irq <= 0) {
/* register shared periodic/carry/alarm irq */
ret = request_irq(rtc->periodic_irq, sh_rtc_shared,
IRQF_DISABLED, "sh-rtc", rtc);
if (unlikely(ret)) {
dev_err(&pdev->dev,
"request IRQ failed with %d, IRQ %d\n", ret,
rtc->periodic_irq);
goto err_unmap;
}
} else {
/* register periodic/carry/alarm irqs */
ret = request_irq(rtc->periodic_irq, sh_rtc_periodic,
IRQF_DISABLED, "sh-rtc period", rtc);
if (unlikely(ret)) {
dev_err(&pdev->dev,
"request period IRQ failed with %d, IRQ %d\n",
ret, rtc->periodic_irq);
goto err_unmap;
}
ret = request_irq(rtc->carry_irq, sh_rtc_interrupt,
IRQF_DISABLED, "sh-rtc carry", rtc);
if (unlikely(ret)) {
dev_err(&pdev->dev,
"request carry IRQ failed with %d, IRQ %d\n",
ret, rtc->carry_irq);
free_irq(rtc->periodic_irq, rtc);
goto err_unmap;
}
ret = request_irq(rtc->alarm_irq, sh_rtc_alarm,
IRQF_DISABLED, "sh-rtc alarm", rtc);
if (unlikely(ret)) {
dev_err(&pdev->dev,
"request alarm IRQ failed with %d, IRQ %d\n",
ret, rtc->alarm_irq);
free_irq(rtc->carry_irq, rtc);
free_irq(rtc->periodic_irq, rtc);
goto err_unmap;
}
}
platform_set_drvdata(pdev, rtc);
/* everything disabled by default */
sh_rtc_irq_set_freq(&pdev->dev, 0);
sh_rtc_irq_set_state(&pdev->dev, 0);
sh_rtc_setaie(&pdev->dev, 0);
sh_rtc_setcie(&pdev->dev, 0);
rtc->rtc_dev = rtc_device_register("sh", &pdev->dev,
&sh_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc->rtc_dev)) {
ret = PTR_ERR(rtc->rtc_dev);
free_irq(rtc->periodic_irq, rtc);
free_irq(rtc->carry_irq, rtc);
free_irq(rtc->alarm_irq, rtc);
goto err_unmap;
}
rtc->rtc_dev->max_user_freq = 256;
/* reset rtc to epoch 0 if time is invalid */
if (rtc_read_time(rtc->rtc_dev, &r) < 0) {
rtc_time_to_tm(0, &r);
rtc_set_time(rtc->rtc_dev, &r);
}
device_init_wakeup(&pdev->dev, 1);
return 0;
err_unmap:
clk_disable(rtc->clk);
clk_put(rtc->clk);
iounmap(rtc->regbase);
err_badmap:
release_resource(rtc->res);
err_badres:
kfree(rtc);
return ret;
}