diff options
Diffstat (limited to 'drivers/rtc/rtc-cmos.c')
| -rw-r--r-- | drivers/rtc/rtc-cmos.c | 156 |
1 files changed, 118 insertions, 38 deletions
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index 24e733c98f8..b0e4a3eb33c 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -34,11 +34,11 @@ #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/platform_device.h> -#include <linux/mod_devicetable.h> #include <linux/log2.h> #include <linux/pm.h> #include <linux/of.h> #include <linux/of_platform.h> +#include <linux/dmi.h> /* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */ #include <asm-generic/rtc.h> @@ -377,6 +377,51 @@ static int cmos_set_alarm(struct device *dev, struct rtc_wkalrm *t) return 0; } +/* + * Do not disable RTC alarm on shutdown - workaround for b0rked BIOSes. + */ +static bool alarm_disable_quirk; + +static int __init set_alarm_disable_quirk(const struct dmi_system_id *id) +{ + alarm_disable_quirk = true; + pr_info("rtc-cmos: BIOS has alarm-disable quirk. "); + pr_info("RTC alarms disabled\n"); + return 0; +} + +static const struct dmi_system_id rtc_quirks[] __initconst = { + /* https://bugzilla.novell.com/show_bug.cgi?id=805740 */ + { + .callback = set_alarm_disable_quirk, + .ident = "IBM Truman", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "4852570"), + }, + }, + /* https://bugzilla.novell.com/show_bug.cgi?id=812592 */ + { + .callback = set_alarm_disable_quirk, + .ident = "Gigabyte GA-990XA-UD3", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, + "Gigabyte Technology Co., Ltd."), + DMI_MATCH(DMI_PRODUCT_NAME, "GA-990XA-UD3"), + }, + }, + /* http://permalink.gmane.org/gmane.linux.kernel/1604474 */ + { + .callback = set_alarm_disable_quirk, + .ident = "Toshiba Satellite L300", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), + DMI_MATCH(DMI_PRODUCT_NAME, "Satellite L300"), + }, + }, + {} +}; + static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct cmos_rtc *cmos = dev_get_drvdata(dev); @@ -385,6 +430,9 @@ static int cmos_alarm_irq_enable(struct device *dev, unsigned int enabled) if (!is_valid_irq(cmos->irq)) return -EINVAL; + if (alarm_disable_quirk) + return 0; + spin_lock_irqsave(&rtc_lock, flags); if (enabled) @@ -595,10 +643,11 @@ static irqreturn_t cmos_interrupt(int irq, void *p) static int INITSECTION cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) { - struct cmos_rtc_board_info *info = dev->platform_data; + struct cmos_rtc_board_info *info = dev_get_platdata(dev); int retval = 0; unsigned char rtc_control; unsigned address_space; + u32 flags = 0; /* there can be only one ... */ if (cmos_rtc.dev) @@ -612,9 +661,12 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) * REVISIT non-x86 systems may instead use memory space resources * (needing ioremap etc), not i/o space resources like this ... */ - ports = request_region(ports->start, - resource_size(ports), - driver_name); + if (RTC_IOMAPPED) + ports = request_region(ports->start, resource_size(ports), + driver_name); + else + ports = request_mem_region(ports->start, resource_size(ports), + driver_name); if (!ports) { dev_dbg(dev, "i/o registers already in use\n"); return -EBUSY; @@ -651,6 +703,11 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) * expect CMOS_READ and friends to handle. */ if (info) { + if (info->flags) + flags = info->flags; + if (info->address_space) + address_space = info->address_space; + if (info->rtc_day_alarm && info->rtc_day_alarm < 128) cmos_rtc.day_alrm = info->rtc_day_alarm; if (info->rtc_mon_alarm && info->rtc_mon_alarm < 128) @@ -678,18 +735,21 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) spin_lock_irq(&rtc_lock); - /* force periodic irq to CMOS reset default of 1024Hz; - * - * REVISIT it's been reported that at least one x86_64 ALI mobo - * doesn't use 32KHz here ... for portability we might need to - * do something about other clock frequencies. - */ - cmos_rtc.rtc->irq_freq = 1024; - hpet_set_periodic_freq(cmos_rtc.rtc->irq_freq); - CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x06, RTC_FREQ_SELECT); + if (!(flags & CMOS_RTC_FLAGS_NOFREQ)) { + /* force periodic irq to CMOS reset default of 1024Hz; + * + * REVISIT it's been reported that at least one x86_64 ALI + * mobo doesn't use 32KHz here ... for portability we might + * need to do something about other clock frequencies. + */ + cmos_rtc.rtc->irq_freq = 1024; + hpet_set_periodic_freq(cmos_rtc.rtc->irq_freq); + CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x06, RTC_FREQ_SELECT); + } /* disable irqs */ - cmos_irq_disable(&cmos_rtc, RTC_PIE | RTC_AIE | RTC_UIE); + if (is_valid_irq(rtc_irq)) + cmos_irq_disable(&cmos_rtc, RTC_PIE | RTC_AIE | RTC_UIE); rtc_control = CMOS_READ(RTC_CONTROL); @@ -708,11 +768,9 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) irq_handler_t rtc_cmos_int_handler; if (is_hpet_enabled()) { - int err; - rtc_cmos_int_handler = hpet_rtc_interrupt; - err = hpet_register_irq_handler(cmos_interrupt); - if (err != 0) { + retval = hpet_register_irq_handler(cmos_interrupt); + if (retval) { dev_warn(dev, "hpet_register_irq_handler " " failed in rtc_init()."); goto cleanup1; @@ -756,14 +814,18 @@ cleanup1: cmos_rtc.dev = NULL; rtc_device_unregister(cmos_rtc.rtc); cleanup0: - release_region(ports->start, resource_size(ports)); + if (RTC_IOMAPPED) + release_region(ports->start, resource_size(ports)); + else + release_mem_region(ports->start, resource_size(ports)); return retval; } -static void cmos_do_shutdown(void) +static void cmos_do_shutdown(int rtc_irq) { spin_lock_irq(&rtc_lock); - cmos_irq_disable(&cmos_rtc, RTC_IRQMASK); + if (is_valid_irq(rtc_irq)) + cmos_irq_disable(&cmos_rtc, RTC_IRQMASK); spin_unlock_irq(&rtc_lock); } @@ -772,7 +834,7 @@ static void __exit cmos_do_remove(struct device *dev) struct cmos_rtc *cmos = dev_get_drvdata(dev); struct resource *ports; - cmos_do_shutdown(); + cmos_do_shutdown(cmos->irq); sysfs_remove_bin_file(&dev->kobj, &nvram); @@ -785,14 +847,16 @@ static void __exit cmos_do_remove(struct device *dev) cmos->rtc = NULL; ports = cmos->iomem; - release_region(ports->start, resource_size(ports)); + if (RTC_IOMAPPED) + release_region(ports->start, resource_size(ports)); + else + release_mem_region(ports->start, resource_size(ports)); cmos->iomem = NULL; cmos->dev = NULL; - dev_set_drvdata(dev, NULL); } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int cmos_suspend(struct device *dev) { @@ -890,8 +954,6 @@ static int cmos_resume(struct device *dev) return 0; } -static SIMPLE_DEV_PM_OPS(cmos_pm_ops, cmos_suspend, cmos_resume); - #else static inline int cmos_poweroff(struct device *dev) @@ -901,6 +963,8 @@ static inline int cmos_poweroff(struct device *dev) #endif +static SIMPLE_DEV_PM_OPS(cmos_pm_ops, cmos_suspend, cmos_resume); + /*----------------------------------------------------------------*/ /* On non-x86 systems, a "CMOS" RTC lives most naturally on platform_bus. @@ -1020,10 +1084,13 @@ static void __exit cmos_pnp_remove(struct pnp_dev *pnp) static void cmos_pnp_shutdown(struct pnp_dev *pnp) { - if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(&pnp->dev)) + struct device *dev = &pnp->dev; + struct cmos_rtc *cmos = dev_get_drvdata(dev); + + if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(dev)) return; - cmos_do_shutdown(); + cmos_do_shutdown(cmos->irq); } static const struct pnp_device_id rtc_ids[] = { @@ -1043,11 +1110,9 @@ static struct pnp_driver cmos_pnp_driver = { /* flag ensures resume() gets called, and stops syslog spam */ .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, -#ifdef CONFIG_PM_SLEEP .driver = { .pm = &cmos_pm_ops, }, -#endif }; #endif /* CONFIG_PNP */ @@ -1100,11 +1165,21 @@ static inline void cmos_of_init(struct platform_device *pdev) {} static int __init cmos_platform_probe(struct platform_device *pdev) { + struct resource *resource; + int irq; + cmos_of_init(pdev); cmos_wake_setup(&pdev->dev); - return cmos_do_probe(&pdev->dev, - platform_get_resource(pdev, IORESOURCE_IO, 0), - platform_get_irq(pdev, 0)); + + if (RTC_IOMAPPED) + resource = platform_get_resource(pdev, IORESOURCE_IO, 0); + else + resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); + irq = platform_get_irq(pdev, 0); + if (irq < 0) + irq = -1; + + return cmos_do_probe(&pdev->dev, resource, irq); } static int __exit cmos_platform_remove(struct platform_device *pdev) @@ -1115,10 +1190,13 @@ static int __exit cmos_platform_remove(struct platform_device *pdev) static void cmos_platform_shutdown(struct platform_device *pdev) { - if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(&pdev->dev)) + struct device *dev = &pdev->dev; + struct cmos_rtc *cmos = dev_get_drvdata(dev); + + if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(dev)) return; - cmos_do_shutdown(); + cmos_do_shutdown(cmos->irq); } /* work with hotplug and coldplug */ @@ -1128,7 +1206,7 @@ static struct platform_driver cmos_platform_driver = { .remove = __exit_p(cmos_platform_remove), .shutdown = cmos_platform_shutdown, .driver = { - .name = (char *) driver_name, + .name = driver_name, #ifdef CONFIG_PM .pm = &cmos_pm_ops, #endif @@ -1158,6 +1236,8 @@ static int __init cmos_init(void) platform_driver_registered = true; } + dmi_check_system(rtc_quirks); + if (retval == 0) return 0; |