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Diffstat (limited to 'arch/m68k/mvme16x/config.c')
-rw-r--r--arch/m68k/mvme16x/config.c169
1 files changed, 101 insertions, 68 deletions
diff --git a/arch/m68k/mvme16x/config.c b/arch/m68k/mvme16x/config.c
index 6ee36a5b528d..99768fe8da73 100644
--- a/arch/m68k/mvme16x/config.c
+++ b/arch/m68k/mvme16x/config.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/m68k/mvme16x/config.c
*
@@ -8,10 +9,6 @@
* 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>
@@ -19,43 +16,34 @@
#include <linux/mm.h>
#include <linux/seq_file.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/genhd.h>
-#include <linux/rtc.h>
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rtc/m48t59.h>
#include <asm/bootinfo.h>
#include <asm/bootinfo-vme.h>
#include <asm/byteorder.h>
-#include <asm/pgtable.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/mvme16xhw.h>
+#include <asm/config.h>
-extern t_bdid mvme_bdid;
+#include "mvme16x.h"
-static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
+extern t_bdid mvme_bdid;
static void mvme16x_get_model(char *model);
-extern void mvme16x_sched_init(irq_handler_t handler);
-extern u32 mvme16x_gettimeoffset(void);
-extern int mvme16x_hwclk (int, struct rtc_time *);
+extern void mvme16x_sched_init(void);
extern void mvme16x_reset (void);
-int bcd2int (unsigned char b);
-
-/* Save tick handler routine pointer, will point to xtime_update() in
- * kernel/time/timekeeping.c, called via mvme16x_process_int() */
-
-static irq_handler_t tick_handler;
-
-
unsigned short mvme16x_config;
EXPORT_SYMBOL(mvme16x_config);
@@ -120,11 +108,11 @@ static void __init mvme16x_init_IRQ (void)
m68k_setup_user_interrupt(VEC_USER, 192);
}
-#define pcc2chip ((volatile u_char *)0xfff42000)
-#define PccSCCMICR 0x1d
-#define PccSCCTICR 0x1e
-#define PccSCCRICR 0x1f
-#define PccTPIACKR 0x25
+#define PCC2CHIP (0xfff42000)
+#define PCCSCCMICR (PCC2CHIP + 0x1d)
+#define PCCSCCTICR (PCC2CHIP + 0x1e)
+#define PCCSCCRICR (PCC2CHIP + 0x1f)
+#define PCCTPIACKR (PCC2CHIP + 0x25)
#ifdef CONFIG_EARLY_PRINTK
@@ -214,7 +202,6 @@ static void __init mvme16x_init_IRQ (void)
void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
{
volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
- volatile u_char sink;
u_char ier;
int port;
u_char do_lf = 0;
@@ -232,10 +219,10 @@ void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
base_addr[CyIER] = CyTxMpty;
while (1) {
- if (pcc2chip[PccSCCTICR] & 0x20)
+ if (in_8(PCCSCCTICR) & 0x20)
{
/* We have a Tx int. Acknowledge it */
- sink = pcc2chip[PccTPIACKR];
+ in_8(PCCTPIACKR);
if ((base_addr[CyLICR] >> 2) == port) {
if (i == count) {
/* Last char of string is now output */
@@ -274,11 +261,8 @@ void __init config_mvme16x(void)
char id[40];
uint16_t brdno = be16_to_cpu(p->brdno);
- mach_max_dma_address = 0xffffffff;
mach_sched_init = mvme16x_sched_init;
mach_init_IRQ = mvme16x_init_IRQ;
- arch_gettimeoffset = mvme16x_gettimeoffset;
- mach_hwclk = mvme16x_hwclk;
mach_reset = mvme16x_reset;
mach_get_model = mvme16x_get_model;
mach_get_hardware_list = mvme16x_get_hardware_list;
@@ -322,6 +306,28 @@ void __init config_mvme16x(void)
}
}
+static struct resource m48t59_rsrc[] = {
+ DEFINE_RES_MEM(MVME_RTC_BASE, 0x2000),
+};
+
+static struct m48t59_plat_data m48t59_data = {
+ .type = M48T59RTC_TYPE_M48T08,
+ .yy_offset = 70,
+};
+
+static int __init mvme16x_platform_init(void)
+{
+ if (!MACH_IS_MVME16x)
+ return 0;
+
+ platform_device_register_resndata(NULL, "rtc-m48t59", -1,
+ m48t59_rsrc, ARRAY_SIZE(m48t59_rsrc),
+ &m48t59_data, sizeof(m48t59_data));
+ return 0;
+}
+
+arch_initcall(mvme16x_platform_init);
+
static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
{
unsigned long *new = (unsigned long *)vectors;
@@ -350,27 +356,65 @@ static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
return IRQ_HANDLED;
}
+static u64 mvme16x_read_clk(struct clocksource *cs);
+
+static struct clocksource mvme16x_clk = {
+ .name = "pcc",
+ .rating = 250,
+ .read = mvme16x_read_clk,
+ .mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static u32 clk_total;
+
+#define PCC_TIMER_CLOCK_FREQ 1000000
+#define PCC_TIMER_CYCLES (PCC_TIMER_CLOCK_FREQ / HZ)
+
+#define PCCTCMP1 (PCC2CHIP + 0x04)
+#define PCCTCNT1 (PCC2CHIP + 0x08)
+#define PCCTOVR1 (PCC2CHIP + 0x17)
+#define PCCTIC1 (PCC2CHIP + 0x1b)
+
+#define PCCTOVR1_TIC_EN 0x01
+#define PCCTOVR1_COC_EN 0x02
+#define PCCTOVR1_OVR_CLR 0x04
+
+#define PCCTIC1_INT_LEVEL 6
+#define PCCTIC1_INT_CLR 0x08
+#define PCCTIC1_INT_EN 0x10
+
static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
{
- *(volatile unsigned char *)0xfff4201b |= 8;
- return tick_handler(irq, dev_id);
+ unsigned long flags;
+
+ local_irq_save(flags);
+ out_8(PCCTOVR1, PCCTOVR1_OVR_CLR | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN);
+ out_8(PCCTIC1, PCCTIC1_INT_EN | PCCTIC1_INT_CLR | PCCTIC1_INT_LEVEL);
+ clk_total += PCC_TIMER_CYCLES;
+ legacy_timer_tick(1);
+ local_irq_restore(flags);
+
+ return IRQ_HANDLED;
}
-void mvme16x_sched_init (irq_handler_t timer_routine)
+void mvme16x_sched_init(void)
{
uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
int irq;
- tick_handler = timer_routine;
/* Using PCCchip2 or MC2 chip tick timer 1 */
- *(volatile unsigned long *)0xfff42008 = 0;
- *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */
- *(volatile unsigned char *)0xfff42017 |= 3;
- *(volatile unsigned char *)0xfff4201b = 0x16;
- if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
- "timer", mvme16x_timer_int))
+ if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, IRQF_TIMER, "timer",
+ NULL))
panic ("Couldn't register timer int");
+ out_be32(PCCTCNT1, 0);
+ out_be32(PCCTCMP1, PCC_TIMER_CYCLES);
+ out_8(PCCTOVR1, PCCTOVR1_OVR_CLR | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN);
+ out_8(PCCTIC1, PCCTIC1_INT_EN | PCCTIC1_INT_CLR | PCCTIC1_INT_LEVEL);
+
+ clocksource_register_hz(&mvme16x_clk, PCC_TIMER_CLOCK_FREQ);
+
if (brdno == 0x0162 || brdno == 0x172)
irq = MVME162_IRQ_ABORT;
else
@@ -380,32 +424,21 @@ void mvme16x_sched_init (irq_handler_t timer_routine)
panic ("Couldn't register abort int");
}
-
-/* This is always executed with interrupts disabled. */
-u32 mvme16x_gettimeoffset(void)
+static u64 mvme16x_read_clk(struct clocksource *cs)
{
- return (*(volatile u32 *)0xfff42008) * 1000;
-}
-
-int bcd2int (unsigned char b)
-{
- return ((b>>4)*10 + (b&15));
-}
-
-int mvme16x_hwclk(int op, struct rtc_time *t)
-{
-#warning check me!
- if (!op) {
- rtc->ctrl = RTC_READ;
- t->tm_year = bcd2int (rtc->bcd_year);
- t->tm_mon = bcd2int(rtc->bcd_mth) - 1;
- t->tm_mday = bcd2int (rtc->bcd_dom);
- t->tm_hour = bcd2int (rtc->bcd_hr);
- t->tm_min = bcd2int (rtc->bcd_min);
- t->tm_sec = bcd2int (rtc->bcd_sec);
- rtc->ctrl = 0;
- if (t->tm_year < 70)
- t->tm_year += 100;
- }
- return 0;
+ unsigned long flags;
+ u8 overflow, tmp;
+ u32 ticks;
+
+ local_irq_save(flags);
+ tmp = in_8(PCCTOVR1) >> 4;
+ ticks = in_be32(PCCTCNT1);
+ overflow = in_8(PCCTOVR1) >> 4;
+ if (overflow != tmp)
+ ticks = in_be32(PCCTCNT1);
+ ticks += overflow * PCC_TIMER_CYCLES;
+ ticks += clk_total;
+ local_irq_restore(flags);
+
+ return ticks;
}
generated by cgit (git 2.34.1) at 2025-12-25 14:51:43 +0000