^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* time.c: UltraSparc timer and TOD clock support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 1997, 2008 David S. Miller (davem@davemloft.net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Based largely on code which is:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/param.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/timex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/mc146818rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/profile.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/bcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/cpufreq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/rtc/m48t59.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/clockchips.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/clocksource.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/ftrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <asm/oplib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <asm/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <asm/starfire.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <asm/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <asm/cpudata.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <asm/irq_regs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include "entry.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include "kernel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) DEFINE_SPINLOCK(rtc_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned long profile_pc(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned long pc = instruction_pointer(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (in_lock_functions(pc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return regs->u_regs[UREG_RETPC];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) EXPORT_SYMBOL(profile_pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static void tick_disable_protection(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* Set things up so user can access tick register for profiling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * purposes. Also workaround BB_ERRATA_1 by doing a dummy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * read back of %tick after writing it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) " ba,pt %%xcc, 1f\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) " nop\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) " .align 64\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) "1: rd %%tick, %%g2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) " add %%g2, 6, %%g2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) " andn %%g2, %0, %%g2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) " wrpr %%g2, 0, %%tick\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) " rdpr %%tick, %%g0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) : "r" (TICK_PRIV_BIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) : "g2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static void tick_disable_irq(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) " ba,pt %%xcc, 1f\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) " nop\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) " .align 64\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) "1: wr %0, 0x0, %%tick_cmpr\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) " rd %%tick_cmpr, %%g0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) : "r" (TICKCMP_IRQ_BIT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static void tick_init_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) tick_disable_protection();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) tick_disable_irq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static unsigned long long tick_get_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) unsigned long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) __asm__ __volatile__("rd %%tick, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) "mov %0, %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) : "=r" (ret));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return ret & ~TICK_PRIV_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int tick_add_compare(unsigned long adj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) unsigned long orig_tick, new_tick, new_compare;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) __asm__ __volatile__("rd %%tick, %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) : "=r" (orig_tick));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) orig_tick &= ~TICKCMP_IRQ_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* Workaround for Spitfire Errata (#54 I think??), I discovered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * this via Sun BugID 4008234, mentioned in Solaris-2.5.1 patch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * number 103640.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * On Blackbird writes to %tick_cmpr can fail, the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * workaround seems to be to execute the wr instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * at the start of an I-cache line, and perform a dummy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * read back from %tick_cmpr right after writing to it. -DaveM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) __asm__ __volatile__("ba,pt %%xcc, 1f\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) " add %1, %2, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ".align 64\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) "1:\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) "wr %0, 0, %%tick_cmpr\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) "rd %%tick_cmpr, %%g0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) : "=r" (new_compare)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) : "r" (orig_tick), "r" (adj));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) __asm__ __volatile__("rd %%tick, %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) : "=r" (new_tick));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) new_tick &= ~TICKCMP_IRQ_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return ((long)(new_tick - (orig_tick+adj))) > 0L;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static unsigned long tick_add_tick(unsigned long adj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) unsigned long new_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* Also need to handle Blackbird bug here too. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) __asm__ __volatile__("rd %%tick, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) "add %0, %1, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) "wrpr %0, 0, %%tick\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) : "=&r" (new_tick)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) : "r" (adj));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return new_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* Searches for cpu clock frequency with given cpuid in OpenBoot tree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static unsigned long cpuid_to_freq(phandle node, int cpuid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) bool is_cpu_node = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) unsigned long freq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) char type[128];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (!node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (prom_getproperty(node, "device_type", type, sizeof(type)) != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) is_cpu_node = (strcmp(type, "cpu") == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /* try upa-portid then cpuid to get cpuid, see prom_64.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (is_cpu_node && (prom_getint(node, "upa-portid") == cpuid ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) prom_getint(node, "cpuid") == cpuid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) freq = prom_getintdefault(node, "clock-frequency", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (!freq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) freq = cpuid_to_freq(prom_getchild(node), cpuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (!freq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) freq = cpuid_to_freq(prom_getsibling(node), cpuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static unsigned long tick_get_frequency(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return cpuid_to_freq(prom_root_node, hard_smp_processor_id());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static struct sparc64_tick_ops tick_operations __cacheline_aligned = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .name = "tick",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .init_tick = tick_init_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .disable_irq = tick_disable_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) .get_tick = tick_get_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) .add_tick = tick_add_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) .add_compare = tick_add_compare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) .get_frequency = tick_get_frequency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) .softint_mask = 1UL << 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct sparc64_tick_ops *tick_ops __read_mostly = &tick_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) EXPORT_SYMBOL(tick_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static void stick_disable_irq(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) "wr %0, 0x0, %%asr25"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) : "r" (TICKCMP_IRQ_BIT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static void stick_init_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /* Writes to the %tick and %stick register are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * allowed on sun4v. The Hypervisor controls that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * bit, per-strand.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (tlb_type != hypervisor) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) tick_disable_protection();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) tick_disable_irq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* Let the user get at STICK too. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) " rd %%asr24, %%g2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) " andn %%g2, %0, %%g2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) " wr %%g2, 0, %%asr24"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) : "r" (TICK_PRIV_BIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) : "g1", "g2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) stick_disable_irq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static unsigned long long stick_get_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) unsigned long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) __asm__ __volatile__("rd %%asr24, %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) : "=r" (ret));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return ret & ~TICK_PRIV_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static unsigned long stick_add_tick(unsigned long adj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) unsigned long new_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) __asm__ __volatile__("rd %%asr24, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) "add %0, %1, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) "wr %0, 0, %%asr24\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) : "=&r" (new_tick)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) : "r" (adj));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) return new_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static int stick_add_compare(unsigned long adj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) unsigned long orig_tick, new_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) __asm__ __volatile__("rd %%asr24, %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) : "=r" (orig_tick));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) orig_tick &= ~TICKCMP_IRQ_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) __asm__ __volatile__("wr %0, 0, %%asr25"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) : "r" (orig_tick + adj));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) __asm__ __volatile__("rd %%asr24, %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) : "=r" (new_tick));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) new_tick &= ~TICKCMP_IRQ_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return ((long)(new_tick - (orig_tick+adj))) > 0L;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static unsigned long stick_get_frequency(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return prom_getintdefault(prom_root_node, "stick-frequency", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static struct sparc64_tick_ops stick_operations __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) .name = "stick",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) .init_tick = stick_init_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) .disable_irq = stick_disable_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) .get_tick = stick_get_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) .add_tick = stick_add_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) .add_compare = stick_add_compare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) .get_frequency = stick_get_frequency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) .softint_mask = 1UL << 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) /* On Hummingbird the STICK/STICK_CMPR register is implemented
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * in I/O space. There are two 64-bit registers each, the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * first holds the low 32-bits of the value and the second holds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * the high 32-bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * Since STICK is constantly updating, we have to access it carefully.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * The sequence we use to read is:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * 1) read high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * 2) read low
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * 3) read high again, if it rolled re-read both low and high again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * Writing STICK safely is also tricky:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * 1) write low to zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * 2) write high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * 3) write low
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static unsigned long __hbird_read_stick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) unsigned long ret, tmp1, tmp2, tmp3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) unsigned long addr = HBIRD_STICK_ADDR+8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) __asm__ __volatile__("ldxa [%1] %5, %2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) "1:\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) "sub %1, 0x8, %1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) "ldxa [%1] %5, %3\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) "add %1, 0x8, %1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) "ldxa [%1] %5, %4\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) "cmp %4, %2\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) "bne,a,pn %%xcc, 1b\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) " mov %4, %2\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) "sllx %4, 32, %4\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) "or %3, %4, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) : "=&r" (ret), "=&r" (addr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) : "i" (ASI_PHYS_BYPASS_EC_E), "1" (addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static void __hbird_write_stick(unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) unsigned long low = (val & 0xffffffffUL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) unsigned long high = (val >> 32UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) unsigned long addr = HBIRD_STICK_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) __asm__ __volatile__("stxa %%g0, [%0] %4\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) "add %0, 0x8, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) "stxa %3, [%0] %4\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) "sub %0, 0x8, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) "stxa %2, [%0] %4"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) : "=&r" (addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) : "0" (addr), "r" (low), "r" (high),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) "i" (ASI_PHYS_BYPASS_EC_E));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static void __hbird_write_compare(unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) unsigned long low = (val & 0xffffffffUL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) unsigned long high = (val >> 32UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) unsigned long addr = HBIRD_STICKCMP_ADDR + 0x8UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) __asm__ __volatile__("stxa %3, [%0] %4\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) "sub %0, 0x8, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) "stxa %2, [%0] %4"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) : "=&r" (addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) : "0" (addr), "r" (low), "r" (high),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) "i" (ASI_PHYS_BYPASS_EC_E));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static void hbtick_disable_irq(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) __hbird_write_compare(TICKCMP_IRQ_BIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static void hbtick_init_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) tick_disable_protection();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /* XXX This seems to be necessary to 'jumpstart' Hummingbird
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * XXX into actually sending STICK interrupts. I think because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * XXX of how we store %tick_cmpr in head.S this somehow resets the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * XXX {TICK + STICK} interrupt mux. -DaveM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) __hbird_write_stick(__hbird_read_stick());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) hbtick_disable_irq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) static unsigned long long hbtick_get_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) return __hbird_read_stick() & ~TICK_PRIV_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static unsigned long hbtick_add_tick(unsigned long adj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) val = __hbird_read_stick() + adj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) __hbird_write_stick(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) static int hbtick_add_compare(unsigned long adj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) unsigned long val = __hbird_read_stick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) unsigned long val2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) val &= ~TICKCMP_IRQ_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) val += adj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) __hbird_write_compare(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) val2 = __hbird_read_stick() & ~TICKCMP_IRQ_BIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) return ((long)(val2 - val)) > 0L;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) static unsigned long hbtick_get_frequency(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return prom_getintdefault(prom_root_node, "stick-frequency", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) static struct sparc64_tick_ops hbtick_operations __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) .name = "hbtick",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) .init_tick = hbtick_init_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) .disable_irq = hbtick_disable_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) .get_tick = hbtick_get_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) .add_tick = hbtick_add_tick,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) .add_compare = hbtick_add_compare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) .get_frequency = hbtick_get_frequency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) .softint_mask = 1UL << 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) unsigned long cmos_regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) EXPORT_SYMBOL(cmos_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) static struct resource rtc_cmos_resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) static struct platform_device rtc_cmos_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) .name = "rtc_cmos",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) .id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) .resource = &rtc_cmos_resource,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) .num_resources = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) static int rtc_probe(struct platform_device *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct resource *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) printk(KERN_INFO "%pOF: RTC regs at 0x%llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) op->dev.of_node, op->resource[0].start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) /* The CMOS RTC driver only accepts IORESOURCE_IO, so cons
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) * up a fake resource so that the probe works for all cases.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * When the RTC is behind an ISA bus it will have IORESOURCE_IO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * already, whereas when it's behind EBUS is will be IORESOURCE_MEM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) r = &rtc_cmos_resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) r->flags = IORESOURCE_IO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) r->name = op->resource[0].name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) r->start = op->resource[0].start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) r->end = op->resource[0].end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) cmos_regs = op->resource[0].start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) return platform_device_register(&rtc_cmos_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) static const struct of_device_id rtc_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) .name = "rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) .compatible = "m5819",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) .name = "rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) .compatible = "isa-m5819p",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) .name = "rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) .compatible = "isa-m5823p",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) .name = "rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) .compatible = "ds1287",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) static struct platform_driver rtc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) .probe = rtc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) .name = "rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) .of_match_table = rtc_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) static struct platform_device rtc_bq4802_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) .name = "rtc-bq4802",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) .id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) .num_resources = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) static int bq4802_probe(struct platform_device *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) printk(KERN_INFO "%pOF: BQ4802 regs at 0x%llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) op->dev.of_node, op->resource[0].start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) rtc_bq4802_device.resource = &op->resource[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) return platform_device_register(&rtc_bq4802_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) static const struct of_device_id bq4802_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) .name = "rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) .compatible = "bq4802",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) static struct platform_driver bq4802_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) .probe = bq4802_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) .name = "bq4802",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) .of_match_table = bq4802_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) static unsigned char mostek_read_byte(struct device *dev, u32 ofs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) void __iomem *regs = (void __iomem *) pdev->resource[0].start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) return readb(regs + ofs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) static void mostek_write_byte(struct device *dev, u32 ofs, u8 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) void __iomem *regs = (void __iomem *) pdev->resource[0].start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) writeb(val, regs + ofs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) static struct m48t59_plat_data m48t59_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) .read_byte = mostek_read_byte,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) .write_byte = mostek_write_byte,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) static struct platform_device m48t59_rtc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) .name = "rtc-m48t59",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) .id = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) .num_resources = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) .dev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) .platform_data = &m48t59_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) static int mostek_probe(struct platform_device *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) struct device_node *dp = op->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* On an Enterprise system there can be multiple mostek clocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) * We should only match the one that is on the central FHC bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) if (of_node_name_eq(dp->parent, "fhc") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) !of_node_name_eq(dp->parent->parent, "central"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) printk(KERN_INFO "%pOF: Mostek regs at 0x%llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) dp, op->resource[0].start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) m48t59_rtc.resource = &op->resource[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) return platform_device_register(&m48t59_rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) static const struct of_device_id mostek_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) .name = "eeprom",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) static struct platform_driver mostek_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) .probe = mostek_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) .name = "mostek",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) .of_match_table = mostek_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) static struct platform_device rtc_sun4v_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) .name = "rtc-sun4v",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) .id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) static struct platform_device rtc_starfire_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) .name = "rtc-starfire",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) .id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) static int __init clock_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) if (this_is_starfire)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) return platform_device_register(&rtc_starfire_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (tlb_type == hypervisor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return platform_device_register(&rtc_sun4v_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) (void) platform_driver_register(&rtc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) (void) platform_driver_register(&mostek_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) (void) platform_driver_register(&bq4802_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) /* Must be after subsys_initcall() so that busses are probed. Must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) * be before device_initcall() because things like the RTC driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * need to see the clock registers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) fs_initcall(clock_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) /* Return true if this is Hummingbird, aka Ultra-IIe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) static bool is_hummingbird(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) unsigned long ver, manuf, impl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) __asm__ __volatile__ ("rdpr %%ver, %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) : "=&r" (ver));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) manuf = ((ver >> 48) & 0xffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) impl = ((ver >> 32) & 0xffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) return (manuf == 0x17 && impl == 0x13);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) struct freq_table {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) unsigned long clock_tick_ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) unsigned int ref_freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) static DEFINE_PER_CPU(struct freq_table, sparc64_freq_table) = { 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) unsigned long sparc64_get_clock_tick(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) struct freq_table *ft = &per_cpu(sparc64_freq_table, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if (ft->clock_tick_ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) return ft->clock_tick_ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) return cpu_data(cpu).clock_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) EXPORT_SYMBOL(sparc64_get_clock_tick);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) #ifdef CONFIG_CPU_FREQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) static int sparc64_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) struct cpufreq_freqs *freq = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) unsigned int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) struct freq_table *ft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) for_each_cpu(cpu, freq->policy->cpus) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) ft = &per_cpu(sparc64_freq_table, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (!ft->ref_freq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) ft->ref_freq = freq->old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) ft->clock_tick_ref = cpu_data(cpu).clock_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if ((val == CPUFREQ_PRECHANGE && freq->old < freq->new) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) (val == CPUFREQ_POSTCHANGE && freq->old > freq->new)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) cpu_data(cpu).clock_tick =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) cpufreq_scale(ft->clock_tick_ref, ft->ref_freq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) freq->new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) static struct notifier_block sparc64_cpufreq_notifier_block = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) .notifier_call = sparc64_cpufreq_notifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) static int __init register_sparc64_cpufreq_notifier(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) cpufreq_register_notifier(&sparc64_cpufreq_notifier_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) CPUFREQ_TRANSITION_NOTIFIER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) core_initcall(register_sparc64_cpufreq_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) #endif /* CONFIG_CPU_FREQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) static int sparc64_next_event(unsigned long delta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) struct clock_event_device *evt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return tick_operations.add_compare(delta) ? -ETIME : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) static int sparc64_timer_shutdown(struct clock_event_device *evt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) tick_operations.disable_irq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) static struct clock_event_device sparc64_clockevent = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) .features = CLOCK_EVT_FEAT_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) .set_state_shutdown = sparc64_timer_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) .set_next_event = sparc64_next_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) .rating = 100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) .shift = 30,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) .irq = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) static DEFINE_PER_CPU(struct clock_event_device, sparc64_events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) void __irq_entry timer_interrupt(int irq, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) struct pt_regs *old_regs = set_irq_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) unsigned long tick_mask = tick_operations.softint_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) int cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) struct clock_event_device *evt = &per_cpu(sparc64_events, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) clear_softint(tick_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) irq_enter();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) local_cpu_data().irq0_irqs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) kstat_incr_irq_this_cpu(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) if (unlikely(!evt->event_handler)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) printk(KERN_WARNING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) "Spurious SPARC64 timer interrupt on cpu %d\n", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) evt->event_handler(evt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) irq_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) set_irq_regs(old_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) void setup_sparc64_timer(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) struct clock_event_device *sevt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) unsigned long pstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) /* Guarantee that the following sequences execute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) * uninterrupted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) __asm__ __volatile__("rdpr %%pstate, %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) "wrpr %0, %1, %%pstate"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) : "=r" (pstate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) : "i" (PSTATE_IE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) tick_operations.init_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) /* Restore PSTATE_IE. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) __asm__ __volatile__("wrpr %0, 0x0, %%pstate"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) : "r" (pstate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) sevt = this_cpu_ptr(&sparc64_events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) memcpy(sevt, &sparc64_clockevent, sizeof(*sevt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) sevt->cpumask = cpumask_of(smp_processor_id());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) clockevents_register_device(sevt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) #define SPARC64_NSEC_PER_CYC_SHIFT 10UL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) static struct clocksource clocksource_tick = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) .rating = 100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) .mask = CLOCKSOURCE_MASK(64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) .flags = CLOCK_SOURCE_IS_CONTINUOUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) static unsigned long tb_ticks_per_usec __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) void __delay(unsigned long loops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) unsigned long bclock = get_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) while ((get_tick() - bclock) < loops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) EXPORT_SYMBOL(__delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) void udelay(unsigned long usecs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) __delay(tb_ticks_per_usec * usecs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) EXPORT_SYMBOL(udelay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) static u64 clocksource_tick_read(struct clocksource *cs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) return get_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) static void __init get_tick_patch(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) unsigned int *addr, *instr, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) struct get_tick_patch *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) if (tlb_type == spitfire && is_hummingbird())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) for (p = &__get_tick_patch; p < &__get_tick_patch_end; p++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) instr = (tlb_type == spitfire) ? p->tick : p->stick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) addr = (unsigned int *)(unsigned long)p->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) for (i = 0; i < GET_TICK_NINSTR; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) addr[i] = instr[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) /* ensure that address is modified before flush */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) flushi(&addr[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) static void __init init_tick_ops(struct sparc64_tick_ops *ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) unsigned long freq, quotient, tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) freq = ops->get_frequency();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) quotient = clocksource_hz2mult(freq, SPARC64_NSEC_PER_CYC_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) tick = ops->get_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) ops->offset = (tick * quotient) >> SPARC64_NSEC_PER_CYC_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) ops->ticks_per_nsec_quotient = quotient;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) ops->frequency = freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) tick_operations = *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) get_tick_patch();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) void __init time_init_early(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) if (tlb_type == spitfire) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) if (is_hummingbird()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) init_tick_ops(&hbtick_operations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) clocksource_tick.archdata.vclock_mode = VCLOCK_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) init_tick_ops(&tick_operations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) clocksource_tick.archdata.vclock_mode = VCLOCK_TICK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) init_tick_ops(&stick_operations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) clocksource_tick.archdata.vclock_mode = VCLOCK_STICK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) void __init time_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) unsigned long freq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) freq = tick_operations.frequency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) tb_ticks_per_usec = freq / USEC_PER_SEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) clocksource_tick.name = tick_operations.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) clocksource_tick.read = clocksource_tick_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) clocksource_register_hz(&clocksource_tick, freq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) printk("clocksource: mult[%x] shift[%d]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) clocksource_tick.mult, clocksource_tick.shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) sparc64_clockevent.name = tick_operations.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) clockevents_calc_mult_shift(&sparc64_clockevent, freq, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) sparc64_clockevent.max_delta_ns =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) clockevent_delta2ns(0x7fffffffffffffffUL, &sparc64_clockevent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) sparc64_clockevent.max_delta_ticks = 0x7fffffffffffffffUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) sparc64_clockevent.min_delta_ns =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) clockevent_delta2ns(0xF, &sparc64_clockevent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) sparc64_clockevent.min_delta_ticks = 0xF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) printk("clockevent: mult[%x] shift[%d]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) sparc64_clockevent.mult, sparc64_clockevent.shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) setup_sparc64_timer();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) unsigned long long sched_clock(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) unsigned long quotient = tick_operations.ticks_per_nsec_quotient;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) unsigned long offset = tick_operations.offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) /* Use barrier so the compiler emits the loads first and overlaps load
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) * latency with reading tick, because reading %tick/%stick is a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) * post-sync instruction that will flush and restart subsequent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) * instructions after it commits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) return ((get_tick() * quotient) >> SPARC64_NSEC_PER_CYC_SHIFT) - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) int read_current_timer(unsigned long *timer_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) *timer_val = get_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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