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authorRalf Baechle <ralf@linux-mips.org>2007-10-31 21:57:55 -0400
committerRalf Baechle <ralf@linux-mips.org>2007-11-02 12:13:47 -0400
commit217dd11e9d0442767fa13c9c188be0b92dc93d7e (patch)
tree9557e15fbad397fcc5a707e85cf1a68132ee6c31 /arch/mips/kernel
parentf3f9ad0edcc1b7bf154bb34fe3b3f71e5379c9f0 (diff)
[MIPS] Sibyte: Split and move clock code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/Makefile4
-rw-r--r--arch/mips/kernel/cevt-bcm1480.c149
-rw-r--r--arch/mips/kernel/cevt-sb1250.c148
-rw-r--r--arch/mips/kernel/csrc-bcm1480.c54
-rw-r--r--arch/mips/kernel/csrc-sb1250.c70
5 files changed, 425 insertions, 0 deletions
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 3196509a28d5..b551535b7e48 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -8,9 +8,13 @@ obj-y += cpu-probe.o branch.o entry.o genex.o irq.o process.o \
8 ptrace.o reset.o semaphore.o setup.o signal.o syscall.o \ 8 ptrace.o reset.o semaphore.o setup.o signal.o syscall.o \
9 time.o topology.o traps.o unaligned.o 9 time.o topology.o traps.o unaligned.o
10 10
11obj-$(CONFIG_CEVT_BCM1480) += cevt-bcm1480.o
11obj-$(CONFIG_CEVT_R4K) += cevt-r4k.o 12obj-$(CONFIG_CEVT_R4K) += cevt-r4k.o
12obj-$(CONFIG_CEVT_GT641XX) += cevt-gt641xx.o 13obj-$(CONFIG_CEVT_GT641XX) += cevt-gt641xx.o
14obj-$(CONFIG_CEVT_SB1250) += cevt-sb1250.o
13obj-$(CONFIG_CEVT_TXX9) += cevt-txx9.o 15obj-$(CONFIG_CEVT_TXX9) += cevt-txx9.o
16obj-$(CONFIG_CSRC_BCM1480) += csrc-bcm1480.o
17obj-$(CONFIG_CSRC_SB1250) += csrc-sb1250.o
14 18
15binfmt_irix-objs := irixelf.o irixinv.o irixioctl.o irixsig.o \ 19binfmt_irix-objs := irixelf.o irixinv.o irixioctl.o irixsig.o \
16 irix5sys.o sysirix.o 20 irix5sys.o sysirix.o
diff --git a/arch/mips/kernel/cevt-bcm1480.c b/arch/mips/kernel/cevt-bcm1480.c
new file mode 100644
index 000000000000..21e6d63eb4d1
--- /dev/null
+++ b/arch/mips/kernel/cevt-bcm1480.c
@@ -0,0 +1,149 @@
1/*
2 * Copyright (C) 2000,2001,2004 Broadcom Corporation
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18#include <linux/clockchips.h>
19#include <linux/interrupt.h>
20#include <linux/percpu.h>
21
22#include <asm/addrspace.h>
23#include <asm/io.h>
24#include <asm/time.h>
25
26#include <asm/sibyte/bcm1480_regs.h>
27#include <asm/sibyte/sb1250_regs.h>
28#include <asm/sibyte/bcm1480_int.h>
29#include <asm/sibyte/bcm1480_scd.h>
30
31#include <asm/sibyte/sb1250.h>
32
33#define IMR_IP2_VAL K_BCM1480_INT_MAP_I0
34#define IMR_IP3_VAL K_BCM1480_INT_MAP_I1
35#define IMR_IP4_VAL K_BCM1480_INT_MAP_I2
36
37/*
38 * The general purpose timer ticks at 1MHz independent if
39 * the rest of the system
40 */
41static void sibyte_set_mode(enum clock_event_mode mode,
42 struct clock_event_device *evt)
43{
44 unsigned int cpu = smp_processor_id();
45 void __iomem *cfg, *init;
46
47 cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
48 init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
49
50 switch (mode) {
51 case CLOCK_EVT_MODE_PERIODIC:
52 __raw_writeq(0, cfg);
53 __raw_writeq((V_SCD_TIMER_FREQ / HZ) - 1, init);
54 __raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
55 cfg);
56 break;
57
58 case CLOCK_EVT_MODE_ONESHOT:
59 /* Stop the timer until we actually program a shot */
60 case CLOCK_EVT_MODE_SHUTDOWN:
61 __raw_writeq(0, cfg);
62 break;
63
64 case CLOCK_EVT_MODE_UNUSED: /* shuddup gcc */
65 case CLOCK_EVT_MODE_RESUME:
66 ;
67 }
68}
69
70static int sibyte_next_event(unsigned long delta, struct clock_event_device *cd)
71{
72 unsigned int cpu = smp_processor_id();
73 void __iomem *cfg, *init;
74
75 cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
76 init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
77
78 __raw_writeq(delta - 1, init);
79 __raw_writeq(M_SCD_TIMER_ENABLE, cfg);
80
81 return 0;
82}
83
84static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
85{
86 unsigned int cpu = smp_processor_id();
87 struct clock_event_device *cd = dev_id;
88 void __iomem *cfg;
89 unsigned long tmode;
90
91 if (cd->mode == CLOCK_EVT_MODE_PERIODIC)
92 tmode = M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS;
93 else
94 tmode = 0;
95
96 /* ACK interrupt */
97 cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
98 ____raw_writeq(tmode, cfg);
99
100 cd->event_handler(cd);
101
102 return IRQ_HANDLED;
103}
104
105static DEFINE_PER_CPU(struct clock_event_device, sibyte_hpt_clockevent);
106static DEFINE_PER_CPU(struct irqaction, sibyte_hpt_irqaction);
107static DEFINE_PER_CPU(char [18], sibyte_hpt_name);
108
109void __cpuinit sb1480_clockevent_init(void)
110{
111 unsigned int cpu = smp_processor_id();
112 unsigned int irq = K_BCM1480_INT_TIMER_0 + cpu;
113 struct irqaction *action = &per_cpu(sibyte_hpt_irqaction, cpu);
114 struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
115 unsigned char *name = per_cpu(sibyte_hpt_name, cpu);
116
117 BUG_ON(cpu > 3); /* Only have 4 general purpose timers */
118
119 sprintf(name, "bcm1480-counter-%d", cpu);
120 cd->name = name;
121 cd->features = CLOCK_EVT_FEAT_PERIODIC |
122 CLOCK_EVT_FEAT_ONESHOT;
123 clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
124 cd->max_delta_ns = clockevent_delta2ns(0x7fffff, cd);
125 cd->min_delta_ns = clockevent_delta2ns(1, cd);
126 cd->rating = 200;
127 cd->irq = irq;
128 cd->cpumask = cpumask_of_cpu(cpu);
129 cd->set_next_event = sibyte_next_event;
130 cd->set_mode = sibyte_set_mode;
131 clockevents_register_device(cd);
132
133 bcm1480_mask_irq(cpu, irq);
134
135 /*
136 * Map the timer interrupt to IP[4] of this cpu
137 */
138 __raw_writeq(IMR_IP4_VAL,
139 IOADDR(A_BCM1480_IMR_REGISTER(cpu,
140 R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) + (irq << 3)));
141
142 bcm1480_unmask_irq(cpu, irq);
143
144 action->handler = sibyte_counter_handler;
145 action->flags = IRQF_DISABLED | IRQF_PERCPU;
146 action->name = name;
147 action->dev_id = cd;
148 setup_irq(irq, action);
149}
diff --git a/arch/mips/kernel/cevt-sb1250.c b/arch/mips/kernel/cevt-sb1250.c
new file mode 100644
index 000000000000..e2029d0fc39b
--- /dev/null
+++ b/arch/mips/kernel/cevt-sb1250.c
@@ -0,0 +1,148 @@
1/*
2 * Copyright (C) 2000, 2001 Broadcom Corporation
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18#include <linux/clockchips.h>
19#include <linux/interrupt.h>
20#include <linux/percpu.h>
21
22#include <asm/addrspace.h>
23#include <asm/io.h>
24#include <asm/time.h>
25
26#include <asm/sibyte/sb1250.h>
27#include <asm/sibyte/sb1250_regs.h>
28#include <asm/sibyte/sb1250_int.h>
29#include <asm/sibyte/sb1250_scd.h>
30
31#define IMR_IP2_VAL K_INT_MAP_I0
32#define IMR_IP3_VAL K_INT_MAP_I1
33#define IMR_IP4_VAL K_INT_MAP_I2
34
35/*
36 * The general purpose timer ticks at 1MHz independent if
37 * the rest of the system
38 */
39static void sibyte_set_mode(enum clock_event_mode mode,
40 struct clock_event_device *evt)
41{
42 unsigned int cpu = smp_processor_id();
43 void __iomem *cfg, *init;
44
45 cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
46 init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
47
48 switch (mode) {
49 case CLOCK_EVT_MODE_PERIODIC:
50 __raw_writeq(0, cfg);
51 __raw_writeq((V_SCD_TIMER_FREQ / HZ) - 1, init);
52 __raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
53 cfg);
54 break;
55
56 case CLOCK_EVT_MODE_ONESHOT:
57 /* Stop the timer until we actually program a shot */
58 case CLOCK_EVT_MODE_SHUTDOWN:
59 __raw_writeq(0, cfg);
60 break;
61
62 case CLOCK_EVT_MODE_UNUSED: /* shuddup gcc */
63 case CLOCK_EVT_MODE_RESUME:
64 ;
65 }
66}
67
68static int sibyte_next_event(unsigned long delta, struct clock_event_device *cd)
69{
70 unsigned int cpu = smp_processor_id();
71 void __iomem *cfg, *init;
72
73 cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
74 init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
75
76 __raw_writeq(delta - 1, init);
77 __raw_writeq(M_SCD_TIMER_ENABLE, cfg);
78
79 return 0;
80}
81
82static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
83{
84 unsigned int cpu = smp_processor_id();
85 struct clock_event_device *cd = dev_id;
86 void __iomem *cfg;
87 unsigned long tmode;
88
89 if (cd->mode == CLOCK_EVT_MODE_PERIODIC)
90 tmode = M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS;
91 else
92 tmode = 0;
93
94 /* ACK interrupt */
95 cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
96 ____raw_writeq(tmode, cfg);
97
98 cd->event_handler(cd);
99
100 return IRQ_HANDLED;
101}
102
103static DEFINE_PER_CPU(struct clock_event_device, sibyte_hpt_clockevent);
104static DEFINE_PER_CPU(struct irqaction, sibyte_hpt_irqaction);
105static DEFINE_PER_CPU(char [18], sibyte_hpt_name);
106
107void __cpuinit sb1250_clockevent_init(void)
108{
109 unsigned int cpu = smp_processor_id();
110 unsigned int irq = K_INT_TIMER_0 + cpu;
111 struct irqaction *action = &per_cpu(sibyte_hpt_irqaction, cpu);
112 struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
113 unsigned char *name = per_cpu(sibyte_hpt_name, cpu);
114
115 /* Only have 4 general purpose timers, and we use last one as hpt */
116 BUG_ON(cpu > 2);
117
118 sprintf(name, "sb1250-counter-%d", cpu);
119 cd->name = name;
120 cd->features = CLOCK_EVT_FEAT_PERIODIC |
121 CLOCK_EVT_FEAT_ONESHOT;
122 clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
123 cd->max_delta_ns = clockevent_delta2ns(0x7fffff, cd);
124 cd->min_delta_ns = clockevent_delta2ns(1, cd);
125 cd->rating = 200;
126 cd->irq = irq;
127 cd->cpumask = cpumask_of_cpu(cpu);
128 cd->set_next_event = sibyte_next_event;
129 cd->set_mode = sibyte_set_mode;
130 clockevents_register_device(cd);
131
132 sb1250_mask_irq(cpu, irq);
133
134 /*
135 * Map the timer interrupt to IP[4] of this cpu
136 */
137 __raw_writeq(IMR_IP4_VAL,
138 IOADDR(A_IMR_REGISTER(cpu, R_IMR_INTERRUPT_MAP_BASE) +
139 (irq << 3)));
140
141 sb1250_unmask_irq(cpu, irq);
142
143 action->handler = sibyte_counter_handler;
144 action->flags = IRQF_DISABLED | IRQF_PERCPU;
145 action->name = name;
146 action->dev_id = cd;
147 setup_irq(irq, action);
148}
diff --git a/arch/mips/kernel/csrc-bcm1480.c b/arch/mips/kernel/csrc-bcm1480.c
new file mode 100644
index 000000000000..868745e7184b
--- /dev/null
+++ b/arch/mips/kernel/csrc-bcm1480.c
@@ -0,0 +1,54 @@
1/*
2 * Copyright (C) 2000,2001,2004 Broadcom Corporation
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18#include <linux/clocksource.h>
19
20#include <asm/addrspace.h>
21#include <asm/io.h>
22#include <asm/time.h>
23
24#include <asm/sibyte/bcm1480_regs.h>
25#include <asm/sibyte/sb1250_regs.h>
26#include <asm/sibyte/bcm1480_int.h>
27#include <asm/sibyte/bcm1480_scd.h>
28
29#include <asm/sibyte/sb1250.h>
30
31static cycle_t bcm1480_hpt_read(void)
32{
33 return (cycle_t) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
34}
35
36struct clocksource bcm1480_clocksource = {
37 .name = "zbbus-cycles",
38 .rating = 200,
39 .read = bcm1480_hpt_read,
40 .mask = CLOCKSOURCE_MASK(64),
41 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
42};
43
44void __init sb1480_clocksource_init(void)
45{
46 struct clocksource *cs = &bcm1480_clocksource;
47 unsigned int plldiv;
48 unsigned long zbbus;
49
50 plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
51 zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
52 clocksource_set_clock(cs, zbbus);
53 clocksource_register(cs);
54}
diff --git a/arch/mips/kernel/csrc-sb1250.c b/arch/mips/kernel/csrc-sb1250.c
new file mode 100644
index 000000000000..ebb16e668877
--- /dev/null
+++ b/arch/mips/kernel/csrc-sb1250.c
@@ -0,0 +1,70 @@
1/*
2 * Copyright (C) 2000, 2001 Broadcom Corporation
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18#include <linux/clocksource.h>
19
20#include <asm/addrspace.h>
21#include <asm/io.h>
22#include <asm/time.h>
23
24#include <asm/sibyte/sb1250.h>
25#include <asm/sibyte/sb1250_regs.h>
26#include <asm/sibyte/sb1250_int.h>
27#include <asm/sibyte/sb1250_scd.h>
28
29#define SB1250_HPT_NUM 3
30#define SB1250_HPT_VALUE M_SCD_TIMER_CNT /* max value */
31
32/*
33 * The HPT is free running from SB1250_HPT_VALUE down to 0 then starts over
34 * again.
35 */
36static cycle_t sb1250_hpt_read(void)
37{
38 unsigned int count;
39
40 count = G_SCD_TIMER_CNT(__raw_readq(IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM, R_SCD_TIMER_CNT))));
41
42 return SB1250_HPT_VALUE - count;
43}
44
45struct clocksource bcm1250_clocksource = {
46 .name = "MIPS",
47 .rating = 200,
48 .read = sb1250_hpt_read,
49 .mask = CLOCKSOURCE_MASK(23),
50 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
51};
52
53void __init sb1250_clocksource_init(void)
54{
55 struct clocksource *cs = &bcm1250_clocksource;
56
57 /* Setup hpt using timer #3 but do not enable irq for it */
58 __raw_writeq(0,
59 IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
60 R_SCD_TIMER_CFG)));
61 __raw_writeq(SB1250_HPT_VALUE,
62 IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
63 R_SCD_TIMER_INIT)));
64 __raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
65 IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
66 R_SCD_TIMER_CFG)));
67
68 clocksource_set_clock(cs, V_SCD_TIMER_FREQ);
69 clocksource_register(cs);
70}
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