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![Linus Torvalds](/assets/img/avatar_default.png)
This cleans up two ancient timer features that were never completed in the past, CONFIG_GENERIC_CLOCKEVENTS and CONFIG_ARCH_USES_GETTIMEOFFSET. There was only one user left for the ARCH_USES_GETTIMEOFFSET variant of clocksource implementations, the ARM EBSA110 platform. Rather than changing to use modern timekeeping, we remove the platform entirely as Russell no longer uses his machine and nobody else seems to have one any more. The conditional code for using arch_gettimeoffset() is removed as a result. For CONFIG_GENERIC_CLOCKEVENTS, there are still a couple of platforms not using clockevent drivers: parisc, ia64, most of m68k, and one Arm platform. These all do timer ticks slighly differently, and this gets cleaned up to the point they at least all call the same helper function. Instead of most platforms using 'select GENERIC_CLOCKEVENTS' in Kconfig, the polarity is now reversed, with the few remaining ones selecting LEGACY_TIMER_TICK instead. Signed-off-by: Arnd Bergmann <arnd@arndb.de> -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEo6/YBQwIrVS28WGKmmx57+YAGNkFAl/Y1v8ACgkQmmx57+YA GNmCvQ/9EDlgCt92r8SB+LGafDtgB8TUQZeIrs9S2mByzdxwnw0lxObIXFCnhQgh RpG3dR+ONRDnC5eI149B377JOEFMZWe2+BtYHUHkFARtUEWatslQcz7yAGvVRK/l TS/qReb6piKltlzuanF1bMZbjy2OhlaDRcm+OlC3y5mALR33M4emb+rJ6cSdfk3K v1iZhrxtfQT77ztesh/oPkPiyQ6kNcz7SfpyYOb6f5VLlml2BZ7YwBSVyGY7urHk RL3XqOUP4KKlMEAI8w0E2nvft6Fk+luziBhrMYWK0GvbmI1OESENuX/c6tgT2OQ1 DRaVHvcPG/EAY8adOKxxVyHhEJDSoz5GJV/EtjlOegsJk6RomczR1uuiT3Kvm7Ah PktMKv4xQht1E15KPSKbOvNIEP18w2s5z6gw+jVDv8pw42pVEQManm1D+BICqrhl fcpw6T1drf9UxAjwX4+zXtmNs+a+mqiFG8puU4VVgT4GpQ8umHvunXz2WUjZO0jc 3m8ErJHBvtJwW5TOHGyXnjl9SkwPzHOfF6IcXTYWEDU4/gQIK9TwUvCjLc0lE27t FMCV2ds7/K1CXwRgpa5IrefSkb8yOXSbRZ56NqqF7Ekxw4J5bYRSaY7jb+qD/e+3 5O1y+iPxFrpH+16hSahvzrtcdFNbLQvBBuRtEQOYuHLt2UJrNoU= =QpNs -----END PGP SIGNATURE----- Merge tag 'asm-generic-timers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic cross-architecture timer cleanup from Arnd Bergmann: "This cleans up two ancient timer features that were never completed in the past, CONFIG_GENERIC_CLOCKEVENTS and CONFIG_ARCH_USES_GETTIMEOFFSET. There was only one user left for the ARCH_USES_GETTIMEOFFSET variant of clocksource implementations, the ARM EBSA110 platform. Rather than changing to use modern timekeeping, we remove the platform entirely as Russell no longer uses his machine and nobody else seems to have one any more. The conditional code for using arch_gettimeoffset() is removed as a result. For CONFIG_GENERIC_CLOCKEVENTS, there are still a couple of platforms not using clockevent drivers: parisc, ia64, most of m68k, and one Arm platform. These all do timer ticks slighly differently, and this gets cleaned up to the point they at least all call the same helper function. Instead of most platforms using 'select GENERIC_CLOCKEVENTS' in Kconfig, the polarity is now reversed, with the few remaining ones selecting LEGACY_TIMER_TICK instead" * tag 'asm-generic-timers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: timekeeping: default GENERIC_CLOCKEVENTS to enabled timekeeping: remove xtime_update m68k: remove timer_interrupt() function m68k: change remaining timers to legacy_timer_tick m68k: m68328: use legacy_timer_tick() m68k: sun3/sun3c: use legacy_timer_tick m68k: split heartbeat out of timer function m68k: coldfire: use legacy_timer_tick() parisc: use legacy_timer_tick ARM: rpc: use legacy_timer_tick ia64: convert to legacy_timer_tick timekeeping: add CONFIG_LEGACY_TIMER_TICK timekeeping: remove arch_gettimeoffset net: remove am79c961a driver ARM: remove ebsa110 platform
299 lines
6.2 KiB
C
299 lines
6.2 KiB
C
/*
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* arch/m68k/q40/config.c
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*
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* Copyright (C) 1999 Richard Zidlicky
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*
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* originally based on:
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*
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* linux/bvme/config.c
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file README.legal in the main directory of this archive
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* for more details.
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*/
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/tty.h>
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#include <linux/console.h>
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <linux/major.h>
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#include <linux/serial_reg.h>
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#include <linux/rtc.h>
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#include <linux/vt_kern.h>
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#include <linux/bcd.h>
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#include <linux/platform_device.h>
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#include <asm/io.h>
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#include <asm/bootinfo.h>
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#include <asm/setup.h>
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#include <asm/irq.h>
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#include <asm/traps.h>
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#include <asm/machdep.h>
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#include <asm/q40_master.h>
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extern void q40_init_IRQ(void);
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static void q40_get_model(char *model);
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extern void q40_sched_init(void);
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static int q40_hwclk(int, struct rtc_time *);
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static unsigned int q40_get_ss(void);
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static int q40_get_rtc_pll(struct rtc_pll_info *pll);
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static int q40_set_rtc_pll(struct rtc_pll_info *pll);
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extern void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/);
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static void q40_mem_console_write(struct console *co, const char *b,
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unsigned int count);
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extern int ql_ticks;
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static struct console q40_console_driver = {
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.name = "debug",
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.write = q40_mem_console_write,
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.flags = CON_PRINTBUFFER,
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.index = -1,
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};
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/* early debugging function:*/
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extern char *q40_mem_cptr; /*=(char *)0xff020000;*/
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static int _cpleft;
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static void q40_mem_console_write(struct console *co, const char *s,
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unsigned int count)
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{
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const char *p = s;
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if (count < _cpleft) {
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while (count-- > 0) {
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*q40_mem_cptr = *p++;
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q40_mem_cptr += 4;
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_cpleft--;
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}
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}
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}
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static int __init q40_debug_setup(char *arg)
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{
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/* useful for early debugging stages - writes kernel messages into SRAM */
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if (MACH_IS_Q40 && !strncmp(arg, "mem", 3)) {
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/*pr_info("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/
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_cpleft = 2000 - ((long)q40_mem_cptr-0xff020000) / 4;
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register_console(&q40_console_driver);
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}
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return 0;
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}
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early_param("debug", q40_debug_setup);
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#if 0
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void printq40(char *str)
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{
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int l = strlen(str);
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char *p = q40_mem_cptr;
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while (l-- > 0 && _cpleft-- > 0) {
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*p = *str++;
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p += 4;
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}
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q40_mem_cptr = p;
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}
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#endif
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static int halted;
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#ifdef CONFIG_HEARTBEAT
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static void q40_heartbeat(int on)
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{
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if (halted)
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return;
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if (on)
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Q40_LED_ON();
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else
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Q40_LED_OFF();
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}
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#endif
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static void q40_reset(void)
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{
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halted = 1;
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pr_info("*******************************************\n"
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"Called q40_reset : press the RESET button!!\n"
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"*******************************************\n");
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Q40_LED_ON();
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while (1)
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;
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}
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static void q40_halt(void)
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{
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halted = 1;
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pr_info("*******************\n"
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" Called q40_halt\n"
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"*******************\n");
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Q40_LED_ON();
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while (1)
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;
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}
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static void q40_get_model(char *model)
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{
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sprintf(model, "Q40");
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}
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static unsigned int serports[] =
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{
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0x3f8,0x2f8,0x3e8,0x2e8,0
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};
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static void __init q40_disable_irqs(void)
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{
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unsigned i, j;
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j = 0;
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while ((i = serports[j++]))
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outb(0, i + UART_IER);
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master_outb(0, EXT_ENABLE_REG);
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master_outb(0, KEY_IRQ_ENABLE_REG);
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}
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void __init config_q40(void)
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{
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mach_sched_init = q40_sched_init;
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mach_init_IRQ = q40_init_IRQ;
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mach_hwclk = q40_hwclk;
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mach_get_ss = q40_get_ss;
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mach_get_rtc_pll = q40_get_rtc_pll;
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mach_set_rtc_pll = q40_set_rtc_pll;
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mach_reset = q40_reset;
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mach_get_model = q40_get_model;
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#if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
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mach_beep = q40_mksound;
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#endif
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#ifdef CONFIG_HEARTBEAT
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mach_heartbeat = q40_heartbeat;
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#endif
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mach_halt = q40_halt;
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/* disable a few things that SMSQ might have left enabled */
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q40_disable_irqs();
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}
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int __init q40_parse_bootinfo(const struct bi_record *rec)
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{
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return 1;
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}
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/*
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* Looks like op is non-zero for setting the clock, and zero for
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* reading the clock.
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*
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* struct hwclk_time {
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* unsigned sec; 0..59
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* unsigned min; 0..59
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* unsigned hour; 0..23
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* unsigned day; 1..31
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* unsigned mon; 0..11
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* unsigned year; 00...
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* int wday; 0..6, 0 is Sunday, -1 means unknown/don't set
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* };
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*/
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static int q40_hwclk(int op, struct rtc_time *t)
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{
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if (op) {
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/* Write.... */
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Q40_RTC_CTRL |= Q40_RTC_WRITE;
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Q40_RTC_SECS = bin2bcd(t->tm_sec);
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Q40_RTC_MINS = bin2bcd(t->tm_min);
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Q40_RTC_HOUR = bin2bcd(t->tm_hour);
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Q40_RTC_DATE = bin2bcd(t->tm_mday);
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Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1);
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Q40_RTC_YEAR = bin2bcd(t->tm_year%100);
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if (t->tm_wday >= 0)
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Q40_RTC_DOW = bin2bcd(t->tm_wday+1);
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Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
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} else {
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/* Read.... */
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Q40_RTC_CTRL |= Q40_RTC_READ;
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t->tm_year = bcd2bin (Q40_RTC_YEAR);
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t->tm_mon = bcd2bin (Q40_RTC_MNTH)-1;
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t->tm_mday = bcd2bin (Q40_RTC_DATE);
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t->tm_hour = bcd2bin (Q40_RTC_HOUR);
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t->tm_min = bcd2bin (Q40_RTC_MINS);
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t->tm_sec = bcd2bin (Q40_RTC_SECS);
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Q40_RTC_CTRL &= ~(Q40_RTC_READ);
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if (t->tm_year < 70)
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t->tm_year += 100;
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t->tm_wday = bcd2bin(Q40_RTC_DOW)-1;
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}
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return 0;
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}
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static unsigned int q40_get_ss(void)
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{
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return bcd2bin(Q40_RTC_SECS);
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}
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/* get and set PLL calibration of RTC clock */
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#define Q40_RTC_PLL_MASK ((1<<5)-1)
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#define Q40_RTC_PLL_SIGN (1<<5)
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static int q40_get_rtc_pll(struct rtc_pll_info *pll)
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{
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int tmp = Q40_RTC_CTRL;
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pll->pll_ctrl = 0;
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pll->pll_value = tmp & Q40_RTC_PLL_MASK;
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if (tmp & Q40_RTC_PLL_SIGN)
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pll->pll_value = -pll->pll_value;
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pll->pll_max = 31;
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pll->pll_min = -31;
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pll->pll_posmult = 512;
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pll->pll_negmult = 256;
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pll->pll_clock = 125829120;
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return 0;
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}
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static int q40_set_rtc_pll(struct rtc_pll_info *pll)
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{
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if (!pll->pll_ctrl) {
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/* the docs are a bit unclear so I am doublesetting */
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/* RTC_WRITE here ... */
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int tmp = (pll->pll_value & 31) | (pll->pll_value<0 ? 32 : 0) |
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Q40_RTC_WRITE;
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Q40_RTC_CTRL |= Q40_RTC_WRITE;
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Q40_RTC_CTRL = tmp;
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Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
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return 0;
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} else
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return -EINVAL;
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}
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static __init int q40_add_kbd_device(void)
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{
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struct platform_device *pdev;
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if (!MACH_IS_Q40)
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return -ENODEV;
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pdev = platform_device_register_simple("q40kbd", -1, NULL, 0);
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return PTR_ERR_OR_ZERO(pdev);
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}
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arch_initcall(q40_add_kbd_device);
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