litmus-rt.git - The LITMUS^RT kernel.

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author	Herbert Xu <herbert@gondor.apana.org.au>	2008-03-04 17:29:21 -0500
committer	David S. Miller <davem@davemloft.net>	2008-03-04 17:29:21 -0500
commit	ed58dd41f3aeefc11a7f634db90687f92ea8632e (patch)
tree	4d73cb9b13fb8742cd9da21b7e98420efaa4e70a /kernel/rtmutex-debug.h
parent	7adc3830f90df04a13366914d80a3ed407db5381 (diff)

[ESP]: Add select on AUTHENC

Now the ESP uses the AEAD interface even for algorithms which are not combined mode, we need to select CONFIG_CRYPTO_AUTHENC as otherwise only combined mode algorithms will work. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>

Diffstat (limited to 'kernel/rtmutex-debug.h')

0 files changed, 0 insertions, 0 deletions

/* * Real Time Clock interface for StrongARM SA1x00 and XScale PXA2xx * * Copyright (c) 2000 Nils Faerber * * Based on rtc.c by Paul Gortmaker * * Original Driver by Nils Faerber <nils@kernelconcepts.de> * * Modifications from: * CIH <cih@coventive.com> * Nicolas Pitre <nico@fluxnic.net> * Andrew Christian <andrew.christian@hp.com> * * Converted to the RTC subsystem and Driver Model * by Richard Purdie <rpurdie@rpsys.net> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/platform_device.h> #include <linux/module.h> #include <linux/rtc.h> #include <linux/init.h> #include <linux/fs.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/pm.h> #include <linux/bitops.h> #include <mach/hardware.h> #include <asm/irq.h> #if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP) #include <mach/regs-rtc.h> #endif #define RTC_DEF_DIVIDER (32768 - 1) #define RTC_DEF_TRIM 0 #define RTC_FREQ 1024 struct sa1100_rtc { spinlock_t lock; int irq_1hz; int irq_alarm; struct rtc_device *rtc; }; static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) { struct sa1100_rtc *info = dev_get_drvdata(dev_id); struct rtc_device *rtc = info->rtc; unsigned int rtsr; unsigned long events = 0; spin_lock(&info->lock); rtsr = RTSR; /* clear interrupt sources */ RTSR = 0; /* Fix for a nasty initialization problem the in SA11xx RTSR register. * See also the comments in sa1100_rtc_probe(). */ if (rtsr & (RTSR_ALE | RTSR_HZE)) { /* This is the original code, before there was the if test * above. This code does not clear interrupts that were not * enabled. */ RTSR = (RTSR_AL | RTSR_HZ) & (rtsr >> 2); } else { /* For some reason, it is possible to enter this routine * without interruptions enabled, it has been tested with * several units (Bug in SA11xx chip?). * * This situation leads to an infinite "loop" of interrupt * routine calling and as a result the processor seems to * lock on its first call to open(). */ RTSR = RTSR_AL | RTSR_HZ; } /* clear alarm interrupt if it has occurred */ if (rtsr & RTSR_AL) rtsr &= ~RTSR_ALE; RTSR = rtsr & (RTSR_ALE | RTSR_HZE); /* update irq data & counter */ if (rtsr & RTSR_AL) events |= RTC_AF | RTC_IRQF; if (rtsr & RTSR_HZ) events |= RTC_UF | RTC_IRQF; rtc_update_irq(rtc, 1, events); spin_unlock(&info->lock); return IRQ_HANDLED; } static int sa1100_rtc_open(struct device *dev) { struct sa1100_rtc *info = dev_get_drvdata(dev); struct rtc_device *rtc = info->rtc; int ret; ret = request_irq(info->irq_1hz, sa1100_rtc_interrupt, IRQF_DISABLED, "rtc 1Hz", dev); if (ret) { dev_err(dev, "IRQ %d already in use.\n", info->irq_1hz); goto fail_ui; } ret = request_irq(info->irq_alarm, sa1100_rtc_interrupt, IRQF_DISABLED, "rtc Alrm", dev); if (ret) { dev_err(dev, "IRQ %d already in use.\n", info->irq_alarm); goto fail_ai; } rtc->max_user_freq = RTC_FREQ; rtc_irq_set_freq(rtc, NULL, RTC_FREQ); return 0; fail_ai: free_irq(info->irq_1hz, dev); fail_ui: return ret; } static void sa1100_rtc_release(struct device *dev) { struct sa1100_rtc *info = dev_get_drvdata(dev); spin_lock_irq(&info->lock); RTSR = 0; spin_unlock_irq(&info->lock); free_irq(info->irq_alarm, dev); free_irq(info->irq_1hz, dev); } static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct sa1100_rtc *info = dev_get_drvdata(dev); spin_lock_irq(&info->lock); if (enabled) RTSR |= RTSR_ALE; else RTSR &= ~RTSR_ALE; spin_unlock_irq(&info->lock); return 0; } static int sa1100_rtc_read_time(struct device *dev, struct rtc_time *tm) { rtc_time_to_tm(RCNR, tm); return 0; } static int sa1100_rtc_set_time(struct device *dev, struct rtc_time *tm) { unsigned long time; int ret; ret = rtc_tm_to_time(tm, &time); if (ret == 0) RCNR = time; return ret; } static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { u32 rtsr; rtsr = RTSR; alrm->enabled = (rtsr & RTSR_ALE) ? 1 : 0; alrm->pending = (rtsr & RTSR_AL) ? 1 : 0; return 0; } static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct sa1100_rtc *info = dev_get_drvdata(dev); unsigned long time; int ret; spin_lock_irq(&info->lock); ret = rtc_tm_to_time(&alrm->time, &time); if (ret != 0) goto out; RTSR = RTSR & (RTSR_HZE|RTSR_ALE|RTSR_AL); RTAR = time; if (alrm->enabled) RTSR |= RTSR_ALE; else RTSR &= ~RTSR_ALE; out: spin_unlock_irq(&info->lock); return ret; } static int sa1100_rtc_proc(struct device *dev, struct seq_file *seq) { seq_printf(seq, "trim/divider\t\t: 0x%08x\n", (u32) RTTR); seq_printf(seq, "RTSR\t\t\t: 0x%08x\n", (u32)RTSR); return 0; } static const struct rtc_class_ops sa1100_rtc_ops = { .open = sa1100_rtc_open, .release = sa1100_rtc_release, .read_time = sa1100_rtc_read_time, .set_time = sa1100_rtc_set_time, .read_alarm = sa1100_rtc_read_alarm, .set_alarm = sa1100_rtc_set_alarm, .proc = sa1100_rtc_proc, .alarm_irq_enable = sa1100_rtc_alarm_irq_enable, }; static int sa1100_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; struct sa1100_rtc *info; int irq_1hz, irq_alarm, ret = 0; irq_1hz = platform_get_irq_byname(pdev, "rtc 1Hz"); irq_alarm = platform_get_irq_byname(pdev, "rtc alarm"); if (irq_1hz < 0 || irq_alarm < 0) return -ENODEV; info = kzalloc(sizeof(struct sa1100_rtc), GFP_KERNEL); if (!info) return -ENOMEM; info->irq_1hz = irq_1hz; info->irq_alarm = irq_alarm; spin_lock_init(&info->lock); platform_set_drvdata(pdev, info); /* * According to the manual we should be able to let RTTR be zero * and then a default diviser for a 32.768KHz clock is used. * Apparently this doesn't work, at least for my SA1110 rev 5. * If the clock divider is uninitialized then reset it to the * default value to get the 1Hz clock. */ if (RTTR == 0) { RTTR = RTC_DEF_DIVIDER + (RTC_DEF_TRIM << 16); dev_warn(&pdev->dev, "warning: " "initializing default clock divider/trim value\n"); /* The current RTC value probably doesn't make sense either */ RCNR = 0; } device_init_wakeup(&pdev->dev, 1); rtc = rtc_device_register(pdev->name, &pdev->dev, &sa1100_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { ret = PTR_ERR(rtc); goto err_dev; } info->rtc = rtc; /* Fix for a nasty initialization problem the in SA11xx RTSR register. * See also the comments in sa1100_rtc_interrupt(). * * Sometimes bit 1 of the RTSR (RTSR_HZ) will wake up 1, which means an * interrupt pending, even though interrupts were never enabled. * In this case, this bit it must be reset before enabling * interruptions to avoid a nonexistent interrupt to occur. * * In principle, the same problem would apply to bit 0, although it has * never been observed to happen. * * This issue is addressed both here and in sa1100_rtc_interrupt(). * If the issue is not addressed here, in the times when the processor * wakes up with the bit set there will be one spurious interrupt. * * The issue is also dealt with in sa1100_rtc_interrupt() to be on the * safe side, once the condition that lead to this strange * initialization is unknown and could in principle happen during * normal processing. * * Notice that clearing bit 1 and 0 is accomplished by writting ONES to * the corresponding bits in RTSR. */ RTSR = RTSR_AL | RTSR_HZ; return 0; err_dev: platform_set_drvdata(pdev, NULL); kfree(info); return ret; } static int sa1100_rtc_remove(struct platform_device *pdev) { struct sa1100_rtc *info = platform_get_drvdata(pdev); if (info) { rtc_device_unregister(info->rtc); platform_set_drvdata(pdev, NULL); kfree(info); } return 0; } #ifdef CONFIG_PM static int sa1100_rtc_suspend(struct device *dev) { struct sa1100_rtc *info = dev_get_drvdata(dev); if (device_may_wakeup(dev)) enable_irq_wake(info->irq_alarm); return 0; } static int sa1100_rtc_resume(struct device *dev) { struct sa1100_rtc *info = dev_get_drvdata(dev); if (device_may_wakeup(dev)) disable_irq_wake(info->irq_alarm); return 0; } static const struct dev_pm_ops sa1100_rtc_pm_ops = { .suspend = sa1100_rtc_suspend, .resume = sa1100_rtc_resume, }; #endif static struct platform_driver sa1100_rtc_driver = { .probe = sa1100_rtc_probe, .remove = sa1100_rtc_remove, .driver = { .name = "sa1100-rtc", #ifdef CONFIG_PM .pm = &sa1100_rtc_pm_ops, #endif }, }; module_platform_driver(sa1100_rtc_driver); MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); MODULE_DESCRIPTION("SA11x0/PXA2xx Realtime Clock Driver (RTC)"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:sa1100-rtc");


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