mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-25 03:55:09 +08:00
616355cc81
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmI0+GcQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgprUpD/9aTJEnj7VCw7UouSsg098sdjtoy9ilslU3 ew47K8CIXHbCB4CDqLnFyvCwAdG1XGgS+fUmFAxvTr29R9SZeS5d+bXL6sZzEo0C bwxsJy9MM2QRtMvB+giAt1myXbwB8cG+ketMBWXqwXXRHRzPbbQfMZia7FqWMnfY KQanH9IwYHp1oa5U/W6Qcjm4oCnLgBMRwqByzUCtiF3y9qgaLkK+3IgkNwjJQjLA DTeUJ/9CgxGQQbzA+LPktbw2xfTqiUfcKq0mWx6Zt4wwNXn1ClqUDUXX6QSM8/5u 3OimbscSkEPPTIYZbVBPkhFnAlQb4JaJEgOrbXvYKVV2Dh+eZY81XwNeE/E8gdBY TnHOTOCjkN/4sR3hIrWazlJzPLdpPA0eOYrhguCraQsX9mcsYNxlJ9otRv/Ve99g uqL0RZg3+NoK84fm79FCGy/ZmPQJvJttlBT9CKVwylv/Lky42xWe7AdM3OipKluY 2nh+zN5Ai7WxZdTKXQFRhCSWfWQ+1qW51tB3dcGW+BooZr/oox47qKQVcHsEWbq1 RNR45F5a4AuPwYUHF/P36WviLnEuq9AvX7OTTyYOplyVQohKIoDXp9chVzLNzBiZ KBR00W6MLKKKN+8foalQWgNyb2i2PH7Ib4xRXvXj/22Vwxg5UmUoBmSDSas9SZUS +dMo7CtNgA== =DpgP -----END PGP SIGNATURE----- Merge tag 'for-5.18/block-2022-03-18' of git://git.kernel.dk/linux-block Pull block updates from Jens Axboe: - BFQ cleanups and fixes (Yu, Zhang, Yahu, Paolo) - blk-rq-qos completion fix (Tejun) - blk-cgroup merge fix (Tejun) - Add offline error return value to distinguish it from an IO error on the device (Song) - IO stats fixes (Zhang, Christoph) - blkcg refcount fixes (Ming, Yu) - Fix for indefinite dispatch loop softlockup (Shin'ichiro) - blk-mq hardware queue management improvements (Ming) - sbitmap dead code removal (Ming, John) - Plugging merge improvements (me) - Show blk-crypto capabilities in sysfs (Eric) - Multiple delayed queue run improvement (David) - Block throttling fixes (Ming) - Start deprecating auto module loading based on dev_t (Christoph) - bio allocation improvements (Christoph, Chaitanya) - Get rid of bio_devname (Christoph) - bio clone improvements (Christoph) - Block plugging improvements (Christoph) - Get rid of genhd.h header (Christoph) - Ensure drivers use appropriate flush helpers (Christoph) - Refcounting improvements (Christoph) - Queue initialization and teardown improvements (Ming, Christoph) - Misc fixes/improvements (Barry, Chaitanya, Colin, Dan, Jiapeng, Lukas, Nian, Yang, Eric, Chengming) * tag 'for-5.18/block-2022-03-18' of git://git.kernel.dk/linux-block: (127 commits) block: cancel all throttled bios in del_gendisk() block: let blkcg_gq grab request queue's refcnt block: avoid use-after-free on throttle data block: limit request dispatch loop duration block/bfq-iosched: Fix spelling mistake "tenative" -> "tentative" sr: simplify the local variable initialization in sr_block_open() block: don't merge across cgroup boundaries if blkcg is enabled block: fix rq-qos breakage from skipping rq_qos_done_bio() block: flush plug based on hardware and software queue order block: ensure plug merging checks the correct queue at least once block: move rq_qos_exit() into disk_release() block: do more work in elevator_exit block: move blk_exit_queue into disk_release block: move q_usage_counter release into blk_queue_release block: don't remove hctx debugfs dir from blk_mq_exit_queue block: move blkcg initialization/destroy into disk allocation/release handler sr: implement ->free_disk to simplify refcounting sd: implement ->free_disk to simplify refcounting sd: delay calling free_opal_dev sd: call sd_zbc_release_disk before releasing the scsi_device reference ...
326 lines
9.0 KiB
C
326 lines
9.0 KiB
C
/*
|
|
* arch/m68k/bvme6000/config.c
|
|
*
|
|
* Copyright (C) 1997 Richard Hirst [richard@sleepie.demon.co.uk]
|
|
*
|
|
* Based on:
|
|
*
|
|
* linux/amiga/config.c
|
|
*
|
|
* Copyright (C) 1993 Hamish Macdonald
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file README.legal in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/console.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/init.h>
|
|
#include <linux/major.h>
|
|
#include <linux/rtc.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/bcd.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/bootinfo-vme.h>
|
|
#include <asm/byteorder.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/traps.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/bvme6000hw.h>
|
|
#include <asm/config.h>
|
|
|
|
static void bvme6000_get_model(char *model);
|
|
extern void bvme6000_sched_init(void);
|
|
extern int bvme6000_hwclk (int, struct rtc_time *);
|
|
extern void bvme6000_reset (void);
|
|
void bvme6000_set_vectors (void);
|
|
|
|
|
|
int __init bvme6000_parse_bootinfo(const struct bi_record *bi)
|
|
{
|
|
if (be16_to_cpu(bi->tag) == BI_VME_TYPE)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
void bvme6000_reset(void)
|
|
{
|
|
volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
|
|
|
|
pr_info("\r\n\nCalled bvme6000_reset\r\n"
|
|
"\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
|
|
/* The string of returns is to delay the reset until the whole
|
|
* message is output. */
|
|
/* Enable the watchdog, via PIT port C bit 4 */
|
|
|
|
pit->pcddr |= 0x10; /* WDOG enable */
|
|
|
|
while(1)
|
|
;
|
|
}
|
|
|
|
static void bvme6000_get_model(char *model)
|
|
{
|
|
sprintf(model, "BVME%d000", m68k_cputype == CPU_68060 ? 6 : 4);
|
|
}
|
|
|
|
/*
|
|
* This function is called during kernel startup to initialize
|
|
* the bvme6000 IRQ handling routines.
|
|
*/
|
|
static void __init bvme6000_init_IRQ(void)
|
|
{
|
|
m68k_setup_user_interrupt(VEC_USER, 192);
|
|
}
|
|
|
|
void __init config_bvme6000(void)
|
|
{
|
|
volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
|
|
|
|
/* Board type is only set by newer versions of vmelilo/tftplilo */
|
|
if (!vme_brdtype) {
|
|
if (m68k_cputype == CPU_68060)
|
|
vme_brdtype = VME_TYPE_BVME6000;
|
|
else
|
|
vme_brdtype = VME_TYPE_BVME4000;
|
|
}
|
|
#if 0
|
|
/* Call bvme6000_set_vectors() so ABORT will work, along with BVMBug
|
|
* debugger. Note trap_init() will splat the abort vector, but
|
|
* bvme6000_init_IRQ() will put it back again. Hopefully. */
|
|
|
|
bvme6000_set_vectors();
|
|
#endif
|
|
|
|
mach_sched_init = bvme6000_sched_init;
|
|
mach_init_IRQ = bvme6000_init_IRQ;
|
|
mach_hwclk = bvme6000_hwclk;
|
|
mach_reset = bvme6000_reset;
|
|
mach_get_model = bvme6000_get_model;
|
|
|
|
pr_info("Board is %sconfigured as a System Controller\n",
|
|
*config_reg_ptr & BVME_CONFIG_SW1 ? "" : "not ");
|
|
|
|
/* Now do the PIT configuration */
|
|
|
|
pit->pgcr = 0x00; /* Unidirectional 8 bit, no handshake for now */
|
|
pit->psrr = 0x18; /* PIACK and PIRQ functions enabled */
|
|
pit->pacr = 0x00; /* Sub Mode 00, H2 i/p, no DMA */
|
|
pit->padr = 0x00; /* Just to be tidy! */
|
|
pit->paddr = 0x00; /* All inputs for now (safest) */
|
|
pit->pbcr = 0x80; /* Sub Mode 1x, H4 i/p, no DMA */
|
|
pit->pbdr = 0xbc | (*config_reg_ptr & BVME_CONFIG_SW1 ? 0 : 0x40);
|
|
/* PRI, SYSCON?, Level3, SCC clks from xtal */
|
|
pit->pbddr = 0xf3; /* Mostly outputs */
|
|
pit->pcdr = 0x01; /* PA transceiver disabled */
|
|
pit->pcddr = 0x03; /* WDOG disable */
|
|
|
|
/* Disable snooping for Ethernet and VME accesses */
|
|
|
|
bvme_acr_addrctl = 0;
|
|
}
|
|
|
|
|
|
irqreturn_t bvme6000_abort_int (int irq, void *dev_id)
|
|
{
|
|
unsigned long *new = (unsigned long *)vectors;
|
|
unsigned long *old = (unsigned long *)0xf8000000;
|
|
|
|
/* Wait for button release */
|
|
while (*(volatile unsigned char *)BVME_LOCAL_IRQ_STAT & BVME_ABORT_STATUS)
|
|
;
|
|
|
|
*(new+4) = *(old+4); /* Illegal instruction */
|
|
*(new+9) = *(old+9); /* Trace */
|
|
*(new+47) = *(old+47); /* Trap #15 */
|
|
*(new+0x1f) = *(old+0x1f); /* ABORT switch */
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static u64 bvme6000_read_clk(struct clocksource *cs);
|
|
|
|
static struct clocksource bvme6000_clk = {
|
|
.name = "rtc",
|
|
.rating = 250,
|
|
.read = bvme6000_read_clk,
|
|
.mask = CLOCKSOURCE_MASK(32),
|
|
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
|
|
};
|
|
|
|
static u32 clk_total, clk_offset;
|
|
|
|
#define RTC_TIMER_CLOCK_FREQ 8000000
|
|
#define RTC_TIMER_CYCLES (RTC_TIMER_CLOCK_FREQ / HZ)
|
|
#define RTC_TIMER_COUNT ((RTC_TIMER_CYCLES / 2) - 1)
|
|
|
|
static irqreturn_t bvme6000_timer_int (int irq, void *dev_id)
|
|
{
|
|
unsigned long flags;
|
|
volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
|
|
unsigned char msr;
|
|
|
|
local_irq_save(flags);
|
|
msr = rtc->msr & 0xc0;
|
|
rtc->msr = msr | 0x20; /* Ack the interrupt */
|
|
clk_total += RTC_TIMER_CYCLES;
|
|
clk_offset = 0;
|
|
legacy_timer_tick(1);
|
|
local_irq_restore(flags);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* Set up the RTC timer 1 to mode 2, so T1 output toggles every 5ms
|
|
* (40000 x 125ns). It will interrupt every 10ms, when T1 goes low.
|
|
* So, when reading the elapsed time, you should read timer1,
|
|
* subtract it from 39999, and then add 40000 if T1 is high.
|
|
* That gives you the number of 125ns ticks in to the 10ms period,
|
|
* so divide by 8 to get the microsecond result.
|
|
*/
|
|
|
|
void bvme6000_sched_init (void)
|
|
{
|
|
volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
|
|
unsigned char msr = rtc->msr & 0xc0;
|
|
|
|
rtc->msr = 0; /* Ensure timer registers accessible */
|
|
|
|
if (request_irq(BVME_IRQ_RTC, bvme6000_timer_int, IRQF_TIMER, "timer",
|
|
NULL))
|
|
panic ("Couldn't register timer int");
|
|
|
|
rtc->t1cr_omr = 0x04; /* Mode 2, ext clk */
|
|
rtc->t1msb = RTC_TIMER_COUNT >> 8;
|
|
rtc->t1lsb = RTC_TIMER_COUNT & 0xff;
|
|
rtc->irr_icr1 &= 0xef; /* Route timer 1 to INTR pin */
|
|
rtc->msr = 0x40; /* Access int.cntrl, etc */
|
|
rtc->pfr_icr0 = 0x80; /* Just timer 1 ints enabled */
|
|
rtc->irr_icr1 = 0;
|
|
rtc->t1cr_omr = 0x0a; /* INTR+T1 active lo, push-pull */
|
|
rtc->t0cr_rtmr &= 0xdf; /* Stop timers in standby */
|
|
rtc->msr = 0; /* Access timer 1 control */
|
|
rtc->t1cr_omr = 0x05; /* Mode 2, ext clk, GO */
|
|
|
|
rtc->msr = msr;
|
|
|
|
clocksource_register_hz(&bvme6000_clk, RTC_TIMER_CLOCK_FREQ);
|
|
|
|
if (request_irq(BVME_IRQ_ABORT, bvme6000_abort_int, 0,
|
|
"abort", bvme6000_abort_int))
|
|
panic ("Couldn't register abort int");
|
|
}
|
|
|
|
|
|
/*
|
|
* NOTE: Don't accept any readings within 5us of rollover, as
|
|
* the T1INT bit may be a little slow getting set. There is also
|
|
* a fault in the chip, meaning that reads may produce invalid
|
|
* results...
|
|
*/
|
|
|
|
static u64 bvme6000_read_clk(struct clocksource *cs)
|
|
{
|
|
unsigned long flags;
|
|
volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
|
|
volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
|
|
unsigned char msr, msb;
|
|
unsigned char t1int, t1op;
|
|
u32 v = 800000, ov;
|
|
|
|
local_irq_save(flags);
|
|
|
|
msr = rtc->msr & 0xc0;
|
|
rtc->msr = 0; /* Ensure timer registers accessible */
|
|
|
|
do {
|
|
ov = v;
|
|
t1int = rtc->msr & 0x20;
|
|
t1op = pit->pcdr & 0x04;
|
|
rtc->t1cr_omr |= 0x40; /* Latch timer1 */
|
|
msb = rtc->t1msb; /* Read timer1 */
|
|
v = (msb << 8) | rtc->t1lsb; /* Read timer1 */
|
|
} while (t1int != (rtc->msr & 0x20) ||
|
|
t1op != (pit->pcdr & 0x04) ||
|
|
abs(ov-v) > 80 ||
|
|
v > RTC_TIMER_COUNT - (RTC_TIMER_COUNT / 100));
|
|
|
|
v = RTC_TIMER_COUNT - v;
|
|
if (!t1op) /* If in second half cycle.. */
|
|
v += RTC_TIMER_CYCLES / 2;
|
|
if (msb > 0 && t1int)
|
|
clk_offset = RTC_TIMER_CYCLES;
|
|
rtc->msr = msr;
|
|
|
|
v += clk_offset + clk_total;
|
|
|
|
local_irq_restore(flags);
|
|
|
|
return v;
|
|
}
|
|
|
|
/*
|
|
* Looks like op is non-zero for setting the clock, and zero for
|
|
* reading the clock.
|
|
*
|
|
* struct hwclk_time {
|
|
* unsigned sec; 0..59
|
|
* unsigned min; 0..59
|
|
* unsigned hour; 0..23
|
|
* unsigned day; 1..31
|
|
* unsigned mon; 0..11
|
|
* unsigned year; 00...
|
|
* int wday; 0..6, 0 is Sunday, -1 means unknown/don't set
|
|
* };
|
|
*/
|
|
|
|
int bvme6000_hwclk(int op, struct rtc_time *t)
|
|
{
|
|
volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
|
|
unsigned char msr = rtc->msr & 0xc0;
|
|
|
|
rtc->msr = 0x40; /* Ensure clock and real-time-mode-register
|
|
* are accessible */
|
|
if (op)
|
|
{ /* Write.... */
|
|
rtc->t0cr_rtmr = t->tm_year%4;
|
|
rtc->bcd_tenms = 0;
|
|
rtc->bcd_sec = bin2bcd(t->tm_sec);
|
|
rtc->bcd_min = bin2bcd(t->tm_min);
|
|
rtc->bcd_hr = bin2bcd(t->tm_hour);
|
|
rtc->bcd_dom = bin2bcd(t->tm_mday);
|
|
rtc->bcd_mth = bin2bcd(t->tm_mon + 1);
|
|
rtc->bcd_year = bin2bcd(t->tm_year%100);
|
|
if (t->tm_wday >= 0)
|
|
rtc->bcd_dow = bin2bcd(t->tm_wday+1);
|
|
rtc->t0cr_rtmr = t->tm_year%4 | 0x08;
|
|
}
|
|
else
|
|
{ /* Read.... */
|
|
do {
|
|
t->tm_sec = bcd2bin(rtc->bcd_sec);
|
|
t->tm_min = bcd2bin(rtc->bcd_min);
|
|
t->tm_hour = bcd2bin(rtc->bcd_hr);
|
|
t->tm_mday = bcd2bin(rtc->bcd_dom);
|
|
t->tm_mon = bcd2bin(rtc->bcd_mth)-1;
|
|
t->tm_year = bcd2bin(rtc->bcd_year);
|
|
if (t->tm_year < 70)
|
|
t->tm_year += 100;
|
|
t->tm_wday = bcd2bin(rtc->bcd_dow)-1;
|
|
} while (t->tm_sec != bcd2bin(rtc->bcd_sec));
|
|
}
|
|
|
|
rtc->msr = msr;
|
|
|
|
return 0;
|
|
}
|