Commit 3668b45d authored by Dan Williams's avatar Dan Williams Committed by Russell King

[ARM] 4187/1: iop: unify time implementation across iop32x, iop33x, and iop13xx

* architecture specific details are handled in asm/arch/time.h
* ARCH_IOP13XX now selects PLAT_IOP
* as suggested by Lennert use ifdef CONFIG_XSCALE to skip the cp_wait on
XSC3
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 4434c5c7
......@@ -5,7 +5,6 @@ obj- :=
obj-$(CONFIG_ARCH_IOP13XX) += setup.o
obj-$(CONFIG_ARCH_IOP13XX) += irq.o
obj-$(CONFIG_ARCH_IOP13XX) += time.o
obj-$(CONFIG_ARCH_IOP13XX) += pci.o
obj-$(CONFIG_ARCH_IOP13XX) += io.o
obj-$(CONFIG_MACH_IQ81340SC) += iq81340sc.o
......
......@@ -25,6 +25,7 @@
#include <asm/mach/arch.h>
#include <asm/arch/pci.h>
#include <asm/mach/time.h>
#include <asm/arch/time.h>
extern int init_atu; /* Flag to select which ATU(s) to initialize / disable */
......@@ -78,12 +79,12 @@ static void __init iq81340mc_init(void)
static void __init iq81340mc_timer_init(void)
{
iop13xx_init_time(400000000);
iop_init_time(400000000);
}
static struct sys_timer iq81340mc_timer = {
.init = iq81340mc_timer_init,
.offset = iop13xx_gettimeoffset,
.offset = iop_gettimeoffset,
};
MACHINE_START(IQ81340MC, "Intel IQ81340MC")
......
......@@ -25,6 +25,7 @@
#include <asm/mach/arch.h>
#include <asm/arch/pci.h>
#include <asm/mach/time.h>
#include <asm/arch/time.h>
extern int init_atu;
......@@ -80,12 +81,12 @@ static void __init iq81340sc_init(void)
static void __init iq81340sc_timer_init(void)
{
iop13xx_init_time(400000000);
iop_init_time(400000000);
}
static struct sys_timer iq81340sc_timer = {
.init = iq81340sc_timer_init,
.offset = iop13xx_gettimeoffset,
.offset = iop_gettimeoffset,
};
MACHINE_START(IQ81340SC, "Intel IQ81340SC")
......
/*
* arch/arm/mach-iop13xx/time.c
*
* Timer code for IOP13xx (copied from IOP32x/IOP33x implementation)
*
* Author: Deepak Saxena <dsaxena@mvista.com>
*
* Copyright 2002-2003 MontaVista Software Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/init.h>
#include <linux/timex.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
static unsigned long ticks_per_jiffy;
static unsigned long ticks_per_usec;
static unsigned long next_jiffy_time;
static inline u32 read_tcr1(void)
{
u32 val;
asm volatile("mrc p6, 0, %0, c3, c9, 0" : "=r" (val));
return val;
}
unsigned long iop13xx_gettimeoffset(void)
{
unsigned long offset;
offset = next_jiffy_time - read_tcr1();
return offset / ticks_per_usec;
}
static irqreturn_t
iop13xx_timer_interrupt(int irq, void *dev_id)
{
write_seqlock(&xtime_lock);
asm volatile("mcr p6, 0, %0, c6, c9, 0" : : "r" (1));
while ((signed long)(next_jiffy_time - read_tcr1())
>= ticks_per_jiffy) {
timer_tick();
next_jiffy_time -= ticks_per_jiffy;
}
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
}
static struct irqaction iop13xx_timer_irq = {
.name = "IOP13XX Timer Tick",
.handler = iop13xx_timer_interrupt,
.flags = IRQF_DISABLED | IRQF_TIMER,
};
void __init iop13xx_init_time(unsigned long tick_rate)
{
u32 timer_ctl;
ticks_per_jiffy = (tick_rate + HZ/2) / HZ;
ticks_per_usec = tick_rate / 1000000;
next_jiffy_time = 0xffffffff;
timer_ctl = IOP13XX_TMR_EN | IOP13XX_TMR_PRIVILEGED |
IOP13XX_TMR_RELOAD | IOP13XX_TMR_RATIO_1_1;
/*
* We use timer 0 for our timer interrupt, and timer 1 as
* monotonic counter for tracking missed jiffies.
*/
asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (ticks_per_jiffy - 1));
asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (timer_ctl));
asm volatile("mcr p6, 0, %0, c5, c9, 0" : : "r" (0xffffffff));
asm volatile("mcr p6, 0, %0, c1, c9, 0" : : "r" (timer_ctl));
setup_irq(IRQ_IOP13XX_TIMER0, &iop13xx_timer_irq);
}
......@@ -31,6 +31,7 @@
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/arch/time.h>
/*
* GLAN Tank timer tick configuration.
......@@ -38,12 +39,12 @@
static void __init glantank_timer_init(void)
{
/* 33.333 MHz crystal. */
iop3xx_init_time(200000000);
iop_init_time(200000000);
}
static struct sys_timer glantank_timer = {
.init = glantank_timer_init,
.offset = iop3xx_gettimeoffset,
.offset = iop_gettimeoffset,
};
......
......@@ -36,7 +36,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/arch/time.h>
/*
* The EP80219 and IQ31244 use the same machine ID. To find out
......@@ -56,16 +56,16 @@ static void __init iq31244_timer_init(void)
{
if (is_80219()) {
/* 33.333 MHz crystal. */
iop3xx_init_time(200000000);
iop_init_time(200000000);
} else {
/* 33.000 MHz crystal. */
iop3xx_init_time(198000000);
iop_init_time(198000000);
}
}
static struct sys_timer iq31244_timer = {
.init = iq31244_timer_init,
.offset = iop3xx_gettimeoffset,
.offset = iop_gettimeoffset,
};
......
......@@ -33,6 +33,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/arch/time.h>
/*
* IQ80321 timer tick configuration.
......@@ -40,12 +41,12 @@
static void __init iq80321_timer_init(void)
{
/* 33.333 MHz crystal. */
iop3xx_init_time(200000000);
iop_init_time(200000000);
}
static struct sys_timer iq80321_timer = {
.init = iq80321_timer_init,
.offset = iop3xx_gettimeoffset,
.offset = iop_gettimeoffset,
};
......
......@@ -37,6 +37,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/arch/time.h>
/*
* N2100 timer tick configuration.
......@@ -44,12 +45,12 @@
static void __init n2100_timer_init(void)
{
/* 33.000 MHz crystal. */
iop3xx_init_time(198000000);
iop_init_time(198000000);
}
static struct sys_timer n2100_timer = {
.init = n2100_timer_init,
.offset = iop3xx_gettimeoffset,
.offset = iop_gettimeoffset,
};
......
......@@ -32,6 +32,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/arch/time.h>
/*
* IQ80331 timer tick configuration.
......@@ -40,14 +41,14 @@ static void __init iq80331_timer_init(void)
{
/* D-Step parts run at a higher internal bus frequency */
if (*IOP3XX_ATURID >= 0xa)
iop3xx_init_time(333000000);
iop_init_time(333000000);
else
iop3xx_init_time(266000000);
iop_init_time(266000000);
}
static struct sys_timer iq80331_timer = {
.init = iq80331_timer_init,
.offset = iop3xx_gettimeoffset,
.offset = iop_gettimeoffset,
};
......
......@@ -32,6 +32,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/arch/time.h>
/*
* IQ80332 timer tick configuration.
......@@ -40,14 +41,14 @@ static void __init iq80332_timer_init(void)
{
/* D-Step parts and the iop333 run at a higher internal bus frequency */
if (*IOP3XX_ATURID >= 0xa || *IOP3XX_ATUDID == 0x374)
iop3xx_init_time(333000000);
iop_init_time(333000000);
else
iop3xx_init_time(266000000);
iop_init_time(266000000);
}
static struct sys_timer iq80332_timer = {
.init = iq80332_timer_init,
.offset = iop3xx_gettimeoffset,
.offset = iop_gettimeoffset,
};
......
......@@ -24,6 +24,7 @@ obj-$(CONFIG_ARCH_IOP33X) += cp6.o
# IOP13XX
obj-$(CONFIG_ARCH_IOP13XX) += cp6.o
obj-$(CONFIG_ARCH_IOP13XX) += time.o
obj-m :=
obj-n :=
......
......@@ -24,37 +24,45 @@
#include <asm/uaccess.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#ifdef CONFIG_ARCH_IOP32X
#define IRQ_IOP3XX_TIMER0 IRQ_IOP32X_TIMER0
#else
#ifdef CONFIG_ARCH_IOP33X
#define IRQ_IOP3XX_TIMER0 IRQ_IOP33X_TIMER0
#endif
#endif
#include <asm/arch/time.h>
static unsigned long ticks_per_jiffy;
static unsigned long ticks_per_usec;
static unsigned long next_jiffy_time;
unsigned long iop3xx_gettimeoffset(void)
unsigned long iop_gettimeoffset(void)
{
unsigned long offset;
unsigned long offset, temp1, temp2;
/* enable cp6, if necessary, to avoid taking the overhead of an
* undefined instruction trap
*/
asm volatile (
"mrc p15, 0, %0, c15, c1, 0\n\t"
"ands %1, %0, #(1 << 6)\n\t"
"orreq %0, %0, #(1 << 6)\n\t"
"mcreq p15, 0, %0, c15, c1, 0\n\t"
#ifdef CONFIG_XSCALE
"mrceq p15, 0, %0, c15, c1, 0\n\t"
"moveq %0, %0\n\t"
"subeq pc, pc, #4\n\t"
#endif
: "=r"(temp1), "=r"(temp2) : : "cc");
offset = next_jiffy_time - *IOP3XX_TU_TCR1;
offset = next_jiffy_time - read_tcr1();
return offset / ticks_per_usec;
}
static irqreturn_t
iop3xx_timer_interrupt(int irq, void *dev_id)
iop_timer_interrupt(int irq, void *dev_id)
{
write_seqlock(&xtime_lock);
asm volatile("mcr p6, 0, %0, c6, c1, 0" : : "r" (1));
write_tisr(1);
while ((signed long)(next_jiffy_time - *IOP3XX_TU_TCR1)
>= ticks_per_jiffy) {
while ((signed long)(next_jiffy_time - read_tcr1())
>= ticks_per_jiffy) {
timer_tick();
next_jiffy_time -= ticks_per_jiffy;
}
......@@ -64,13 +72,13 @@ iop3xx_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
static struct irqaction iop3xx_timer_irq = {
.name = "IOP3XX Timer Tick",
.handler = iop3xx_timer_interrupt,
static struct irqaction iop_timer_irq = {
.name = "IOP Timer Tick",
.handler = iop_timer_interrupt,
.flags = IRQF_DISABLED | IRQF_TIMER,
};
void __init iop3xx_init_time(unsigned long tick_rate)
void __init iop_init_time(unsigned long tick_rate)
{
u32 timer_ctl;
......@@ -78,17 +86,17 @@ void __init iop3xx_init_time(unsigned long tick_rate)
ticks_per_usec = tick_rate / 1000000;
next_jiffy_time = 0xffffffff;
timer_ctl = IOP3XX_TMR_EN | IOP3XX_TMR_PRIVILEGED |
IOP3XX_TMR_RELOAD | IOP3XX_TMR_RATIO_1_1;
timer_ctl = IOP_TMR_EN | IOP_TMR_PRIVILEGED |
IOP_TMR_RELOAD | IOP_TMR_RATIO_1_1;
/*
* We use timer 0 for our timer interrupt, and timer 1 as
* monotonic counter for tracking missed jiffies.
*/
asm volatile("mcr p6, 0, %0, c4, c1, 0" : : "r" (ticks_per_jiffy - 1));
asm volatile("mcr p6, 0, %0, c0, c1, 0" : : "r" (timer_ctl));
asm volatile("mcr p6, 0, %0, c5, c1, 0" : : "r" (0xffffffff));
asm volatile("mcr p6, 0, %0, c1, c1, 0" : : "r" (timer_ctl));
write_trr0(ticks_per_jiffy - 1);
write_tmr0(timer_ctl);
write_trr1(0xffffffff);
write_tmr1(timer_ctl);
setup_irq(IRQ_IOP3XX_TIMER0, &iop3xx_timer_irq);
setup_irq(IRQ_IOP_TIMER0, &iop_timer_irq);
}
......@@ -9,8 +9,6 @@ void iop13xx_init_irq(void);
void iop13xx_map_io(void);
void iop13xx_platform_init(void);
void iop13xx_init_irq(void);
void iop13xx_init_time(unsigned long tickrate);
unsigned long iop13xx_gettimeoffset(void);
/* CPUID CP6 R0 Page 0 */
static inline int iop13xx_cpu_id(void)
......@@ -453,14 +451,4 @@ static inline int iop13xx_cpu_id(void)
#define IOP13XX_PBI_BAR1 IOP13XX_PBI_OFFSET(0x10)
#define IOP13XX_PBI_LR1 IOP13XX_PBI_OFFSET(0x14)
#define IOP13XX_TMR_TC 0x01
#define IOP13XX_TMR_EN 0x02
#define IOP13XX_TMR_RELOAD 0x04
#define IOP13XX_TMR_PRIVILEGED 0x08
#define IOP13XX_TMR_RATIO_1_1 0x00
#define IOP13XX_TMR_RATIO_4_1 0x10
#define IOP13XX_TMR_RATIO_8_1 0x20
#define IOP13XX_TMR_RATIO_16_1 0x30
#endif /* _IOP13XX_HW_H_ */
#ifndef _IOP13XX_TIME_H_
#define _IOP13XX_TIME_H_
#define IRQ_IOP_TIMER0 IRQ_IOP13XX_TIMER0
#define IOP_TMR_EN 0x02
#define IOP_TMR_RELOAD 0x04
#define IOP_TMR_PRIVILEGED 0x08
#define IOP_TMR_RATIO_1_1 0x00
void iop_init_time(unsigned long tickrate);
unsigned long iop_gettimeoffset(void);
static inline void write_tmr0(u32 val)
{
asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (val));
}
static inline void write_tmr1(u32 val)
{
asm volatile("mcr p6, 0, %0, c1, c9, 0" : : "r" (val));
}
static inline u32 read_tcr0(void)
{
u32 val;
asm volatile("mrc p6, 0, %0, c2, c9, 0" : "=r" (val));
return val;
}
static inline u32 read_tcr1(void)
{
u32 val;
asm volatile("mrc p6, 0, %0, c3, c9, 0" : "=r" (val));
return val;
}
static inline void write_trr0(u32 val)
{
asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (val));
}
static inline void write_trr1(u32 val)
{
asm volatile("mcr p6, 0, %0, c5, c9, 0" : : "r" (val));
}
static inline void write_tisr(u32 val)
{
asm volatile("mcr p6, 0, %0, c6, c9, 0" : : "r" (val));
}
#endif
#ifndef _IOP32X_TIME_H_
#define _IOP32X_TIME_H_
#define IRQ_IOP_TIMER0 IRQ_IOP32X_TIMER0
#endif
#ifndef _IOP33X_TIME_H_
#define _IOP33X_TIME_H_
#define IRQ_IOP_TIMER0 IRQ_IOP33X_TIMER0
#endif
......@@ -188,14 +188,10 @@ extern void gpio_line_set(int line, int value);
#define IOP3XX_TU_TRR1 (volatile u32 *)IOP3XX_TIMER_REG(0x0014)
#define IOP3XX_TU_TISR (volatile u32 *)IOP3XX_TIMER_REG(0x0018)
#define IOP3XX_TU_WDTCR (volatile u32 *)IOP3XX_TIMER_REG(0x001c)
#define IOP3XX_TMR_TC 0x01
#define IOP3XX_TMR_EN 0x02
#define IOP3XX_TMR_RELOAD 0x04
#define IOP3XX_TMR_PRIVILEGED 0x09
#define IOP3XX_TMR_RATIO_1_1 0x00
#define IOP3XX_TMR_RATIO_4_1 0x10
#define IOP3XX_TMR_RATIO_8_1 0x20
#define IOP3XX_TMR_RATIO_16_1 0x30
#define IOP_TMR_EN 0x02
#define IOP_TMR_RELOAD 0x04
#define IOP_TMR_PRIVILEGED 0x08
#define IOP_TMR_RATIO_1_1 0x00
/* Application accelerator unit */
#define IOP3XX_AAU_ACR (volatile u32 *)IOP3XX_REG_ADDR(0x0800)
......@@ -276,9 +272,48 @@ extern void gpio_line_set(int line, int value);
#ifndef __ASSEMBLY__
void iop3xx_map_io(void);
void iop3xx_init_time(unsigned long);
unsigned long iop3xx_gettimeoffset(void);
void iop_init_cp6_handler(void);
void iop_init_time(unsigned long tickrate);
unsigned long iop_gettimeoffset(void);
static inline void write_tmr0(u32 val)
{
asm volatile("mcr p6, 0, %0, c0, c1, 0" : : "r" (val));
}
static inline void write_tmr1(u32 val)
{
asm volatile("mcr p6, 0, %0, c1, c1, 0" : : "r" (val));
}
static inline u32 read_tcr0(void)
{
u32 val;
asm volatile("mrc p6, 0, %0, c2, c1, 0" : "=r" (val));
return val;
}
static inline u32 read_tcr1(void)
{
u32 val;
asm volatile("mrc p6, 0, %0, c3, c1, 0" : "=r" (val));
return val;
}
static inline void write_trr0(u32 val)
{
asm volatile("mcr p6, 0, %0, c4, c1, 0" : : "r" (val));
}
static inline void write_trr1(u32 val)
{
asm volatile("mcr p6, 0, %0, c5, c1, 0" : : "r" (val));
}
static inline void write_tisr(u32 val)
{
asm volatile("mcr p6, 0, %0, c6, c1, 0" : : "r" (val));
}
extern struct platform_device iop3xx_i2c0_device;
extern struct platform_device iop3xx_i2c1_device;
......
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