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-rw-r--r--arch/mips/ite-boards/generic/time.c249
1 files changed, 0 insertions, 249 deletions
diff --git a/arch/mips/ite-boards/generic/time.c b/arch/mips/ite-boards/generic/time.c
deleted file mode 100644
index 3dc55569ff7f4..0000000000000
--- a/arch/mips/ite-boards/generic/time.c
+++ /dev/null
@@ -1,249 +0,0 @@
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
- *
- * Copyright (C) 2003 MontaVista Software Inc.
- * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
- *
- * ########################################################################
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
- *
- * Setting up the clock on the MIPS boards.
- */
-#include <linux/init.h>
-#include <linux/kernel_stat.h>
-#include <linux/sched.h>
-#include <linux/time.h>
-#include <linux/spinlock.h>
-#include <linux/mc146818rtc.h>
-
-#include <asm/time.h>
-#include <asm/mipsregs.h>
-#include <asm/ptrace.h>
-#include <asm/it8172/it8172.h>
-#include <asm/it8172/it8172_int.h>
-#include <asm/debug.h>
-
-#define IT8172_RTC_ADR_REG (IT8172_PCI_IO_BASE + IT_RTC_BASE)
-#define IT8172_RTC_DAT_REG (IT8172_RTC_ADR_REG + 1)
-#define IT8172_RTC_CENTURY_REG (IT8172_PCI_IO_BASE + IT_RTC_CENTURY)
-
-static volatile char *rtc_adr_reg = (char*)KSEG1ADDR(IT8172_RTC_ADR_REG);
-static volatile char *rtc_dat_reg = (char*)KSEG1ADDR(IT8172_RTC_DAT_REG);
-static volatile char *rtc_century_reg = (char*)KSEG1ADDR(IT8172_RTC_CENTURY_REG);
-
-unsigned char it8172_rtc_read_data(unsigned long addr)
-{
- unsigned char retval;
-
- *rtc_adr_reg = addr;
- retval = *rtc_dat_reg;
- return retval;
-}
-
-void it8172_rtc_write_data(unsigned char data, unsigned long addr)
-{
- *rtc_adr_reg = addr;
- *rtc_dat_reg = data;
-}
-
-#undef CMOS_READ
-#undef CMOS_WRITE
-#define CMOS_READ(addr) it8172_rtc_read_data(addr)
-#define CMOS_WRITE(data, addr) it8172_rtc_write_data(data, addr)
-
-static unsigned char saved_control; /* remember rtc control reg */
-static inline int rtc_24h(void) { return saved_control & RTC_24H; }
-static inline int rtc_dm_binary(void) { return saved_control & RTC_DM_BINARY; }
-
-static inline unsigned char
-bin_to_hw(unsigned char c)
-{
- if (rtc_dm_binary())
- return c;
- else
- return ((c/10) << 4) + (c%10);
-}
-
-static inline unsigned char
-hw_to_bin(unsigned char c)
-{
- if (rtc_dm_binary())
- return c;
- else
- return (c>>4)*10 + (c &0xf);
-}
-
-/* 0x80 bit indicates pm in 12-hour format */
-static inline unsigned char
-hour_bin_to_hw(unsigned char c)
-{
- if (rtc_24h())
- return bin_to_hw(c);
- if (c >= 12)
- return 0x80 | bin_to_hw((c==12)?12:c-12); /* 12 is 12pm */
- else
- return bin_to_hw((c==0)?12:c); /* 0 is 12 AM, not 0 am */
-}
-
-static inline unsigned char
-hour_hw_to_bin(unsigned char c)
-{
- unsigned char tmp = hw_to_bin(c&0x3f);
- if (rtc_24h())
- return tmp;
- if (c & 0x80)
- return (tmp==12)?12:tmp+12; /* 12pm is 12, not 24 */
- else
- return (tmp==12)?0:tmp; /* 12am is 0 */
-}
-
-static unsigned long r4k_offset; /* Amount to increment compare reg each time */
-static unsigned long r4k_cur; /* What counter should be at next timer irq */
-extern unsigned int mips_hpt_frequency;
-
-/*
- * Figure out the r4k offset, the amount to increment the compare
- * register for each time tick.
- * Use the RTC to calculate offset.
- */
-static unsigned long __init cal_r4koff(void)
-{
- unsigned int flags;
-
- local_irq_save(flags);
-
- /* Start counter exactly on falling edge of update flag */
- while (CMOS_READ(RTC_REG_A) & RTC_UIP);
- while (!(CMOS_READ(RTC_REG_A) & RTC_UIP));
-
- /* Start r4k counter. */
- write_c0_count(0);
-
- /* Read counter exactly on falling edge of update flag */
- while (CMOS_READ(RTC_REG_A) & RTC_UIP);
- while (!(CMOS_READ(RTC_REG_A) & RTC_UIP));
-
- mips_hpt_frequency = read_c0_count();
-
- /* restore interrupts */
- local_irq_restore(flags);
-
- return (mips_hpt_frequency / HZ);
-}
-
-static unsigned long
-it8172_rtc_get_time(void)
-{
- unsigned int year, mon, day, hour, min, sec;
- unsigned int flags;
-
- /* avoid update-in-progress. */
- for (;;) {
- local_irq_save(flags);
- if (! (CMOS_READ(RTC_REG_A) & RTC_UIP))
- break;
- /* don't hold intr closed all the time */
- local_irq_restore(flags);
- }
-
- /* Read regs. */
- sec = hw_to_bin(CMOS_READ(RTC_SECONDS));
- min = hw_to_bin(CMOS_READ(RTC_MINUTES));
- hour = hour_hw_to_bin(CMOS_READ(RTC_HOURS));
- day = hw_to_bin(CMOS_READ(RTC_DAY_OF_MONTH));
- mon = hw_to_bin(CMOS_READ(RTC_MONTH));
- year = hw_to_bin(CMOS_READ(RTC_YEAR)) +
- hw_to_bin(*rtc_century_reg) * 100;
-
- /* restore interrupts */
- local_irq_restore(flags);
-
- return mktime(year, mon, day, hour, min, sec);
-}
-
-static int
-it8172_rtc_set_time(unsigned long t)
-{
- struct rtc_time tm;
- unsigned int flags;
-
- /* convert */
- to_tm(t, &tm);
-
- /* avoid update-in-progress. */
- for (;;) {
- local_irq_save(flags);
- if (! (CMOS_READ(RTC_REG_A) & RTC_UIP))
- break;
- /* don't hold intr closed all the time */
- local_irq_restore(flags);
- }
-
- *rtc_century_reg = bin_to_hw(tm.tm_year/100);
- CMOS_WRITE(bin_to_hw(tm.tm_sec), RTC_SECONDS);
- CMOS_WRITE(bin_to_hw(tm.tm_min), RTC_MINUTES);
- CMOS_WRITE(hour_bin_to_hw(tm.tm_hour), RTC_HOURS);
- CMOS_WRITE(bin_to_hw(tm.tm_mday), RTC_DAY_OF_MONTH);
- CMOS_WRITE(bin_to_hw(tm.tm_mon+1), RTC_MONTH); /* tm_mon starts from 0 */
- CMOS_WRITE(bin_to_hw(tm.tm_year%100), RTC_YEAR);
-
- /* restore interrupts */
- local_irq_restore(flags);
-
- return 0;
-}
-
-void __init it8172_time_init(void)
-{
- unsigned int est_freq, flags;
-
- local_irq_save(flags);
-
- saved_control = CMOS_READ(RTC_CONTROL);
-
- printk("calculating r4koff... ");
- r4k_offset = cal_r4koff();
- printk("%08lx(%d)\n", r4k_offset, (int) r4k_offset);
-
- est_freq = 2*r4k_offset*HZ;
- est_freq += 5000; /* round */
- est_freq -= est_freq%10000;
- printk("CPU frequency %d.%02d MHz\n", est_freq/1000000,
- (est_freq%1000000)*100/1000000);
-
- local_irq_restore(flags);
-
- rtc_mips_get_time = it8172_rtc_get_time;
- rtc_mips_set_time = it8172_rtc_set_time;
-}
-
-#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5)
-
-void __init plat_timer_setup(struct irqaction *irq)
-{
- puts("timer_setup\n");
- put32(NR_IRQS);
- puts("");
- /* we are using the cpu counter for timer interrupts */
- setup_irq(MIPS_CPU_TIMER_IRQ, irq);
-
- /* to generate the first timer interrupt */
- r4k_cur = (read_c0_count() + r4k_offset);
- write_c0_compare(r4k_cur);
- set_c0_status(ALLINTS);
-}
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-12 16:09:48 +0000