From 989a3c578011cad60fc167cdb1b9a0e603f43072 Mon Sep 17 00:00:00 2001 From: Marcin Juszkiewicz Date: Fri, 28 Apr 2006 19:06:59 +0000 Subject: * add initial support for gumstix (xscale pxa255) platform (gumstix.com) * add GMUstix distro for gumstix (GMU = George Mason University) * add linux-gumstix-2.6.15 with gumstix patchset * close bug #861 --- .../rmk-2022-2-rtctime-sa110-pxa255-driver.patch | 329 +++++++++++++++++++++ 1 file changed, 329 insertions(+) create mode 100644 packages/linux/linux-gumstix-2.6.15/rmk-2022-2-rtctime-sa110-pxa255-driver.patch (limited to 'packages/linux/linux-gumstix-2.6.15/rmk-2022-2-rtctime-sa110-pxa255-driver.patch') diff --git a/packages/linux/linux-gumstix-2.6.15/rmk-2022-2-rtctime-sa110-pxa255-driver.patch b/packages/linux/linux-gumstix-2.6.15/rmk-2022-2-rtctime-sa110-pxa255-driver.patch new file mode 100644 index 0000000000..87f4ebdc38 --- /dev/null +++ b/packages/linux/linux-gumstix-2.6.15/rmk-2022-2-rtctime-sa110-pxa255-driver.patch @@ -0,0 +1,329 @@ +Index: linux-2.6.15gum/drivers/char/sa1100-rtc.c +=================================================================== +--- /dev/null ++++ linux-2.6.15gum/drivers/char/sa1100-rtc.c +@@ -0,0 +1,297 @@ ++/* ++ * Real Time Clock interface for Linux on StrongARM SA1100 ++ * ++ * Copyright (c) 2000 Nils Faerber ++ * ++ * Based on rtc.c by Paul Gortmaker ++ * Date/time conversion routines taken from arch/arm/kernel/time.c ++ * by Linus Torvalds and Russel King ++ * and the GNU C Library ++ * ( ... I love the GPL ... just take what you need! ;) ++ * ++ * 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. ++ * ++ * 1.00 2001-06-08 Nicolas Pitre ++ * - added periodic timer capability using OSMR1 ++ * - flag compatibility with other RTC chips ++ * - permission checks for ioctls ++ * - major cleanup, partial rewrite ++ * ++ * 0.03 2001-03-07 CIH ++ * - Modify the bug setups RTC clock. ++ * ++ * 0.02 2001-02-27 Nils Faerber ++ * - removed mktime(), added alarm irq clear ++ * ++ * 0.01 2000-10-01 Nils Faerber ++ * - initial release ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#ifdef CONFIG_ARCH_PXA ++#include ++#endif ++ ++#include ++#include ++#include ++#include ++ ++#define TIMER_FREQ 3686400 ++ ++#define RTC_DEF_DIVIDER 32768 - 1 ++#define RTC_DEF_TRIM 0 ++ ++/* Those are the bits from a classic RTC we want to mimic */ ++#define RTC_IRQF 0x80 /* any of the following 3 is active */ ++#define RTC_PF 0x40 ++#define RTC_AF 0x20 ++#define RTC_UF 0x10 ++ ++static unsigned long rtc_freq = 1024; ++static struct rtc_time rtc_alarm = { ++ .tm_year = 0, ++ .tm_mon = 0, ++ .tm_mday = 0, ++ .tm_hour = 0, ++ .tm_mon = 0, ++ .tm_sec = 0, ++}; ++ ++extern spinlock_t rtc_lock; ++ ++static int rtc_update_alarm(struct rtc_time *alrm) ++{ ++ struct rtc_time alarm_tm, now_tm; ++ unsigned long now, time; ++ int ret; ++ ++ printk("Updating alarm\n"); ++ do { ++ now = RCNR; ++ rtc_time_to_tm(now, &now_tm); ++ rtc_next_alarm_time(&alarm_tm, &now_tm, alrm); ++ ret = rtc_tm_to_time(&alarm_tm, &time); ++ if (ret != 0) ++ break; ++ ++ RTSR = RTSR & (RTSR_HZE|RTSR_ALE|RTSR_AL); ++ RTAR = time; ++ } while (now != RCNR); ++ printk("set RTAR to %lx, now is %lx\n", time, now); ++ ++ return ret; ++} ++ ++static irqreturn_t rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs) ++{ ++ unsigned int rtsr; ++ unsigned long events = 0; ++ ++ spin_lock(&rtc_lock); ++ ++ rtsr = RTSR; ++ /* clear interrupt sources */ ++ RTSR = 0; ++ RTSR = (RTSR_AL|RTSR_HZ) & (rtsr >> 2); ++ ++ printk(KERN_CRIT "rtc_interrupt: rtsr = %x\n", rtsr); ++ ++ /* clear alarm interrupt if it has occurred */ ++ if (rtsr & RTSR_AL) { ++ printk(KERN_CRIT "ALARM INTRRUPT\n"); ++ 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(1, events); ++ ++ if (rtsr & RTSR_AL && rtc_periodic_alarm(&rtc_alarm)) ++ rtc_update_alarm(&rtc_alarm); ++ ++ spin_unlock(&rtc_lock); ++ ++ return IRQ_HANDLED; ++} ++ ++ ++static int sa1100_rtc_open(void) ++{ ++ int ret; ++ ++ ret = request_irq(IRQ_RTC1Hz, rtc_interrupt, SA_INTERRUPT, "rtc 1Hz", NULL); ++ if (ret) { ++ printk(KERN_ERR "rtc: IRQ%d already in use.\n", IRQ_RTC1Hz); ++ goto fail_ui; ++ } ++ ret = request_irq(IRQ_RTCAlrm, rtc_interrupt, SA_INTERRUPT, "rtc Alrm", NULL); ++ if (ret) { ++ printk(KERN_ERR "rtc: IRQ%d already in use.\n", IRQ_RTCAlrm); ++ goto fail_ai; ++ } ++ return 0; ++ ++ fail_ai: ++ free_irq(IRQ_RTC1Hz, NULL); ++ fail_ui: ++ return ret; ++} ++ ++static void sa1100_rtc_release(void) ++{ ++ spin_lock_irq (&rtc_lock); ++ RTSR = 0; ++ OIER &= ~OIER_E1; ++ OSSR = OSSR_M1; ++ spin_unlock_irq (&rtc_lock); ++ ++ free_irq(IRQ_RTCAlrm, NULL); ++ free_irq(IRQ_RTC1Hz, NULL); ++} ++ ++static int sa1100_rtc_ioctl(unsigned int cmd, unsigned long arg) ++{ ++ switch (cmd) { ++ case RTC_AIE_OFF: ++ spin_lock_irq(&rtc_lock); ++ RTSR &= ~RTSR_ALE; ++ spin_unlock_irq(&rtc_lock); ++ return 0; ++ case RTC_AIE_ON: ++ spin_lock_irq(&rtc_lock); ++ RTSR |= RTSR_ALE; ++ spin_unlock_irq(&rtc_lock); ++ return 0; ++ case RTC_UIE_OFF: ++ spin_lock_irq(&rtc_lock); ++ RTSR &= ~RTSR_HZE; ++ spin_unlock_irq(&rtc_lock); ++ return 0; ++ case RTC_UIE_ON: ++ spin_lock_irq(&rtc_lock); ++ RTSR |= RTSR_HZE; ++ spin_unlock_irq(&rtc_lock); ++ return 0; ++ } ++ return -EINVAL; ++} ++ ++static void sa1100_rtc_read_time(struct rtc_time *tm) ++{ ++ rtc_time_to_tm(RCNR, tm); ++} ++ ++static int sa1100_rtc_set_time(struct rtc_time *tm) ++{ ++ unsigned long time; ++ int ret; ++ ++ ret = rtc_tm_to_time(tm, &time); ++ if (ret == 0) ++ RCNR = time; ++ return ret; ++} ++ ++static void sa1100_rtc_read_alarm(struct rtc_wkalrm *alrm) ++{ ++ memcpy(&alrm->time, &rtc_alarm, sizeof(struct rtc_time)); ++ alrm->pending = RTSR & RTSR_AL ? 1 : 0; ++} ++ ++static int sa1100_rtc_set_alarm(struct rtc_wkalrm *alrm) ++{ ++ int ret; ++ ++ printk("sa1100_rtc_set_alarm\n"); ++ ++ spin_lock_irq(&rtc_lock); ++ ret = rtc_update_alarm(&alrm->time); ++ if (ret == 0) { ++ memcpy(&rtc_alarm, &alrm->time, sizeof(struct rtc_time)); ++ ++ if (alrm->enabled) ++ enable_irq_wake(IRQ_RTCAlrm); ++ else ++ disable_irq_wake(IRQ_RTCAlrm); ++ } ++ spin_unlock_irq(&rtc_lock); ++ ++ return ret; ++} ++ ++static int sa1100_rtc_proc(char *buf) ++{ ++ char *p = buf; ++ ++ p += sprintf(p, "trim/divider\t: 0x%08x\n", RTTR); ++ p += sprintf(p, "alarm_IRQ\t: %s\n", (RTSR & RTSR_ALE) ? "yes" : "no" ); ++ p += sprintf(p, "update_IRQ\t: %s\n", (RTSR & RTSR_HZE) ? "yes" : "no"); ++ p += sprintf(p, "periodic_IRQ\t: %s\n", (OIER & OIER_E1) ? "yes" : "no"); ++ p += sprintf(p, "periodic_freq\t: %ld\n", rtc_freq); ++ ++ return p - buf; ++} ++ ++static struct rtc_ops sa1100_rtc_ops = { ++ .owner = THIS_MODULE, ++ .open = sa1100_rtc_open, ++ .release = sa1100_rtc_release, ++ .ioctl = sa1100_rtc_ioctl, ++ ++ .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, ++}; ++ ++static int __init rtc_init(void) ++{ ++ /* ++ * 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); ++ printk(KERN_WARNING "rtc: warning: initializing default clock divider/trim value\n"); ++ /* The current RTC value probably doesn't make sense either */ ++ RCNR = 0; ++ } ++ ++ register_rtc(&sa1100_rtc_ops); ++ ++ return 0; ++} ++ ++static void __exit rtc_exit(void) ++{ ++ unregister_rtc(&sa1100_rtc_ops); ++} ++ ++module_init(rtc_init); ++module_exit(rtc_exit); ++ ++MODULE_AUTHOR("Nils Faerber "); ++MODULE_DESCRIPTION("SA1100 Realtime Clock Driver (RTC)"); ++MODULE_LICENSE("GPL"); /* so says the header */ +Index: linux-2.6.15gum/drivers/char/Makefile +=================================================================== +--- linux-2.6.15gum.orig/drivers/char/Makefile ++++ linux-2.6.15gum/drivers/char/Makefile +@@ -60,6 +60,7 @@ obj-$(CONFIG_RTC) += rtc.o + obj-$(CONFIG_HPET) += hpet.o + obj-$(CONFIG_GEN_RTC) += genrtc.o + obj-$(CONFIG_EFI_RTC) += efirtc.o ++obj-$(CONFIG_SA1100_RTC) += sa1100-rtc.o + obj-$(CONFIG_SGI_DS1286) += ds1286.o + obj-$(CONFIG_SGI_IP27_RTC) += ip27-rtc.o + obj-$(CONFIG_DS1302) += ds1302.o +Index: linux-2.6.15gum/drivers/char/Kconfig +=================================================================== +--- linux-2.6.15gum.orig/drivers/char/Kconfig ++++ linux-2.6.15gum/drivers/char/Kconfig +@@ -790,6 +790,10 @@ config COBALT_LCD + This option enables support for the LCD display and buttons found + on Cobalt systems through a misc device. + ++config SA1100_RTC ++ tristate "SA1100/PXA2xx Real Time Clock" ++ depends on ARCH_SA1100 || ARCH_PXA ++ + config DTLK + tristate "Double Talk PC internal speech card support" + help -- cgit v1.2.3