diff options
-rw-r--r-- | arch/avr32/kernel/time.c | 150 | ||||
-rw-r--r-- | arch/avr32/mach-at32ap/Makefile | 1 | ||||
-rw-r--r-- | arch/avr32/mach-at32ap/at32ap7000.c | 18 | ||||
-rw-r--r-- | arch/avr32/mach-at32ap/time-tc.c | 217 | ||||
-rw-r--r-- | include/asm-avr32/arch-at32ap/time.h | 112 |
5 files changed, 425 insertions, 73 deletions
diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c index c10833f2ee0c..7014a3571ec0 100644 --- a/arch/avr32/kernel/time.c +++ b/arch/avr32/kernel/time.c | |||
@@ -1,5 +1,5 @@ | |||
1 | /* | 1 | /* |
2 | * Copyright (C) 2004-2006 Atmel Corporation | 2 | * Copyright (C) 2004-2007 Atmel Corporation |
3 | * | 3 | * |
4 | * Based on MIPS implementation arch/mips/kernel/time.c | 4 | * Based on MIPS implementation arch/mips/kernel/time.c |
5 | * Copyright 2001 MontaVista Software Inc. | 5 | * Copyright 2001 MontaVista Software Inc. |
@@ -20,18 +20,25 @@ | |||
20 | #include <linux/init.h> | 20 | #include <linux/init.h> |
21 | #include <linux/profile.h> | 21 | #include <linux/profile.h> |
22 | #include <linux/sysdev.h> | 22 | #include <linux/sysdev.h> |
23 | #include <linux/err.h> | ||
23 | 24 | ||
24 | #include <asm/div64.h> | 25 | #include <asm/div64.h> |
25 | #include <asm/sysreg.h> | 26 | #include <asm/sysreg.h> |
26 | #include <asm/io.h> | 27 | #include <asm/io.h> |
27 | #include <asm/sections.h> | 28 | #include <asm/sections.h> |
28 | 29 | ||
29 | static cycle_t read_cycle_count(void) | 30 | /* how many counter cycles in a jiffy? */ |
31 | static u32 cycles_per_jiffy; | ||
32 | |||
33 | /* the count value for the next timer interrupt */ | ||
34 | static u32 expirelo; | ||
35 | |||
36 | cycle_t __weak read_cycle_count(void) | ||
30 | { | 37 | { |
31 | return (cycle_t)sysreg_read(COUNT); | 38 | return (cycle_t)sysreg_read(COUNT); |
32 | } | 39 | } |
33 | 40 | ||
34 | static struct clocksource clocksource_avr32 = { | 41 | struct clocksource __weak clocksource_avr32 = { |
35 | .name = "avr32", | 42 | .name = "avr32", |
36 | .rating = 350, | 43 | .rating = 350, |
37 | .read = read_cycle_count, | 44 | .read = read_cycle_count, |
@@ -40,12 +47,20 @@ static struct clocksource clocksource_avr32 = { | |||
40 | .flags = CLOCK_SOURCE_IS_CONTINUOUS, | 47 | .flags = CLOCK_SOURCE_IS_CONTINUOUS, |
41 | }; | 48 | }; |
42 | 49 | ||
50 | irqreturn_t __weak timer_interrupt(int irq, void *dev_id); | ||
51 | |||
52 | struct irqaction timer_irqaction = { | ||
53 | .handler = timer_interrupt, | ||
54 | .flags = IRQF_DISABLED, | ||
55 | .name = "timer", | ||
56 | }; | ||
57 | |||
43 | /* | 58 | /* |
44 | * By default we provide the null RTC ops | 59 | * By default we provide the null RTC ops |
45 | */ | 60 | */ |
46 | static unsigned long null_rtc_get_time(void) | 61 | static unsigned long null_rtc_get_time(void) |
47 | { | 62 | { |
48 | return mktime(2004, 1, 1, 0, 0, 0); | 63 | return mktime(2007, 1, 1, 0, 0, 0); |
49 | } | 64 | } |
50 | 65 | ||
51 | static int null_rtc_set_time(unsigned long sec) | 66 | static int null_rtc_set_time(unsigned long sec) |
@@ -56,23 +71,14 @@ static int null_rtc_set_time(unsigned long sec) | |||
56 | static unsigned long (*rtc_get_time)(void) = null_rtc_get_time; | 71 | static unsigned long (*rtc_get_time)(void) = null_rtc_get_time; |
57 | static int (*rtc_set_time)(unsigned long) = null_rtc_set_time; | 72 | static int (*rtc_set_time)(unsigned long) = null_rtc_set_time; |
58 | 73 | ||
59 | /* how many counter cycles in a jiffy? */ | ||
60 | static unsigned long cycles_per_jiffy; | ||
61 | |||
62 | /* cycle counter value at the previous timer interrupt */ | ||
63 | static unsigned int timerhi, timerlo; | ||
64 | |||
65 | /* the count value for the next timer interrupt */ | ||
66 | static unsigned int expirelo; | ||
67 | |||
68 | static void avr32_timer_ack(void) | 74 | static void avr32_timer_ack(void) |
69 | { | 75 | { |
70 | unsigned int count; | 76 | u32 count; |
71 | 77 | ||
72 | /* Ack this timer interrupt and set the next one */ | 78 | /* Ack this timer interrupt and set the next one */ |
73 | expirelo += cycles_per_jiffy; | 79 | expirelo += cycles_per_jiffy; |
80 | /* setting COMPARE to 0 stops the COUNT-COMPARE */ | ||
74 | if (expirelo == 0) { | 81 | if (expirelo == 0) { |
75 | printk(KERN_DEBUG "expirelo == 0\n"); | ||
76 | sysreg_write(COMPARE, expirelo + 1); | 82 | sysreg_write(COMPARE, expirelo + 1); |
77 | } else { | 83 | } else { |
78 | sysreg_write(COMPARE, expirelo); | 84 | sysreg_write(COMPARE, expirelo); |
@@ -86,27 +92,56 @@ static void avr32_timer_ack(void) | |||
86 | } | 92 | } |
87 | } | 93 | } |
88 | 94 | ||
89 | static unsigned int avr32_hpt_read(void) | 95 | int __weak avr32_hpt_init(void) |
90 | { | 96 | { |
91 | return sysreg_read(COUNT); | 97 | int ret; |
98 | unsigned long mult, shift, count_hz; | ||
99 | |||
100 | count_hz = clk_get_rate(boot_cpu_data.clk); | ||
101 | shift = clocksource_avr32.shift; | ||
102 | mult = clocksource_hz2mult(count_hz, shift); | ||
103 | clocksource_avr32.mult = mult; | ||
104 | |||
105 | { | ||
106 | u64 tmp; | ||
107 | |||
108 | tmp = TICK_NSEC; | ||
109 | tmp <<= shift; | ||
110 | tmp += mult / 2; | ||
111 | do_div(tmp, mult); | ||
112 | |||
113 | cycles_per_jiffy = tmp; | ||
114 | } | ||
115 | |||
116 | ret = setup_irq(0, &timer_irqaction); | ||
117 | if (ret) { | ||
118 | pr_debug("timer: could not request IRQ 0: %d\n", ret); | ||
119 | return -ENODEV; | ||
120 | } | ||
121 | |||
122 | printk(KERN_INFO "timer: AT32AP COUNT-COMPARE at irq 0, " | ||
123 | "%lu.%03lu MHz\n", | ||
124 | ((count_hz + 500) / 1000) / 1000, | ||
125 | ((count_hz + 500) / 1000) % 1000); | ||
126 | |||
127 | return 0; | ||
92 | } | 128 | } |
93 | 129 | ||
94 | /* | 130 | /* |
95 | * Taken from MIPS c0_hpt_timer_init(). | 131 | * Taken from MIPS c0_hpt_timer_init(). |
96 | * | 132 | * |
97 | * Why is it so complicated, and what is "count"? My assumption is | 133 | * The reason COUNT is written twice is probably to make sure we don't get any |
98 | * that `count' specifies the "reference cycle", i.e. the cycle since | 134 | * timer interrupts while we are messing with the counter. |
99 | * reset that should mean "zero". The reason COUNT is written twice is | ||
100 | * probably to make sure we don't get any timer interrupts while we | ||
101 | * are messing with the counter. | ||
102 | */ | 135 | */ |
103 | static void avr32_hpt_init(unsigned int count) | 136 | int __weak avr32_hpt_start(void) |
104 | { | 137 | { |
105 | count = sysreg_read(COUNT) - count; | 138 | u32 count = sysreg_read(COUNT); |
106 | expirelo = (count / cycles_per_jiffy + 1) * cycles_per_jiffy; | 139 | expirelo = (count / cycles_per_jiffy + 1) * cycles_per_jiffy; |
107 | sysreg_write(COUNT, expirelo - cycles_per_jiffy); | 140 | sysreg_write(COUNT, expirelo - cycles_per_jiffy); |
108 | sysreg_write(COMPARE, expirelo); | 141 | sysreg_write(COMPARE, expirelo); |
109 | sysreg_write(COUNT, count); | 142 | sysreg_write(COUNT, count); |
143 | |||
144 | return 0; | ||
110 | } | 145 | } |
111 | 146 | ||
112 | /* | 147 | /* |
@@ -115,26 +150,18 @@ static void avr32_hpt_init(unsigned int count) | |||
115 | * | 150 | * |
116 | * In UP mode, it is invoked from the (global) timer_interrupt. | 151 | * In UP mode, it is invoked from the (global) timer_interrupt. |
117 | */ | 152 | */ |
118 | static void local_timer_interrupt(int irq, void *dev_id) | 153 | void local_timer_interrupt(int irq, void *dev_id) |
119 | { | 154 | { |
120 | if (current->pid) | 155 | if (current->pid) |
121 | profile_tick(CPU_PROFILING); | 156 | profile_tick(CPU_PROFILING); |
122 | update_process_times(user_mode(get_irq_regs())); | 157 | update_process_times(user_mode(get_irq_regs())); |
123 | } | 158 | } |
124 | 159 | ||
125 | static irqreturn_t | 160 | irqreturn_t __weak timer_interrupt(int irq, void *dev_id) |
126 | timer_interrupt(int irq, void *dev_id) | ||
127 | { | 161 | { |
128 | unsigned int count; | ||
129 | |||
130 | /* ack timer interrupt and try to set next interrupt */ | 162 | /* ack timer interrupt and try to set next interrupt */ |
131 | count = avr32_hpt_read(); | ||
132 | avr32_timer_ack(); | 163 | avr32_timer_ack(); |
133 | 164 | ||
134 | /* Update timerhi/timerlo for intra-jiffy calibration */ | ||
135 | timerhi += count < timerlo; /* Wrap around */ | ||
136 | timerlo = count; | ||
137 | |||
138 | /* | 165 | /* |
139 | * Call the generic timer interrupt handler | 166 | * Call the generic timer interrupt handler |
140 | */ | 167 | */ |
@@ -153,60 +180,37 @@ timer_interrupt(int irq, void *dev_id) | |||
153 | return IRQ_HANDLED; | 180 | return IRQ_HANDLED; |
154 | } | 181 | } |
155 | 182 | ||
156 | static struct irqaction timer_irqaction = { | ||
157 | .handler = timer_interrupt, | ||
158 | .flags = IRQF_DISABLED, | ||
159 | .name = "timer", | ||
160 | }; | ||
161 | |||
162 | void __init time_init(void) | 183 | void __init time_init(void) |
163 | { | 184 | { |
164 | unsigned long mult, shift, count_hz; | ||
165 | int ret; | 185 | int ret; |
166 | 186 | ||
187 | /* | ||
188 | * Make sure we don't get any COMPARE interrupts before we can | ||
189 | * handle them. | ||
190 | */ | ||
191 | sysreg_write(COMPARE, 0); | ||
192 | |||
167 | xtime.tv_sec = rtc_get_time(); | 193 | xtime.tv_sec = rtc_get_time(); |
168 | xtime.tv_nsec = 0; | 194 | xtime.tv_nsec = 0; |
169 | 195 | ||
170 | set_normalized_timespec(&wall_to_monotonic, | 196 | set_normalized_timespec(&wall_to_monotonic, |
171 | -xtime.tv_sec, -xtime.tv_nsec); | 197 | -xtime.tv_sec, -xtime.tv_nsec); |
172 | 198 | ||
173 | printk("Before time_init: count=%08lx, compare=%08lx\n", | 199 | ret = avr32_hpt_init(); |
174 | (unsigned long)sysreg_read(COUNT), | 200 | if (ret) { |
175 | (unsigned long)sysreg_read(COMPARE)); | 201 | pr_debug("timer: failed setup: %d\n", ret); |
176 | 202 | return; | |
177 | count_hz = clk_get_rate(boot_cpu_data.clk); | ||
178 | shift = clocksource_avr32.shift; | ||
179 | mult = clocksource_hz2mult(count_hz, shift); | ||
180 | clocksource_avr32.mult = mult; | ||
181 | |||
182 | printk("Cycle counter: mult=%lu, shift=%lu\n", mult, shift); | ||
183 | |||
184 | { | ||
185 | u64 tmp; | ||
186 | |||
187 | tmp = TICK_NSEC; | ||
188 | tmp <<= shift; | ||
189 | tmp += mult / 2; | ||
190 | do_div(tmp, mult); | ||
191 | |||
192 | cycles_per_jiffy = tmp; | ||
193 | } | 203 | } |
194 | 204 | ||
195 | /* This sets up the high precision timer for the first interrupt. */ | ||
196 | avr32_hpt_init(avr32_hpt_read()); | ||
197 | |||
198 | printk("After time_init: count=%08lx, compare=%08lx\n", | ||
199 | (unsigned long)sysreg_read(COUNT), | ||
200 | (unsigned long)sysreg_read(COMPARE)); | ||
201 | |||
202 | ret = clocksource_register(&clocksource_avr32); | 205 | ret = clocksource_register(&clocksource_avr32); |
203 | if (ret) | 206 | if (ret) |
204 | printk(KERN_ERR | 207 | pr_debug("timer: could not register clocksource: %d\n", ret); |
205 | "timer: could not register clocksource: %d\n", ret); | ||
206 | 208 | ||
207 | ret = setup_irq(0, &timer_irqaction); | 209 | ret = avr32_hpt_start(); |
208 | if (ret) | 210 | if (ret) { |
209 | printk("timer: could not request IRQ 0: %d\n", ret); | 211 | pr_debug("timer: failed starting: %d\n", ret); |
212 | return; | ||
213 | } | ||
210 | } | 214 | } |
211 | 215 | ||
212 | static struct sysdev_class timer_class = { | 216 | static struct sysdev_class timer_class = { |
diff --git a/arch/avr32/mach-at32ap/Makefile b/arch/avr32/mach-at32ap/Makefile index b21bea9af8b1..f1d395724ac6 100644 --- a/arch/avr32/mach-at32ap/Makefile +++ b/arch/avr32/mach-at32ap/Makefile | |||
@@ -1,2 +1,3 @@ | |||
1 | obj-y += at32ap.o clock.o intc.o extint.o pio.o hsmc.o | 1 | obj-y += at32ap.o clock.o intc.o extint.o pio.o hsmc.o |
2 | obj-$(CONFIG_CPU_AT32AP7000) += at32ap7000.o | 2 | obj-$(CONFIG_CPU_AT32AP7000) += at32ap7000.o |
3 | obj-$(CONFIG_CPU_AT32AP7000) += time-tc.o | ||
diff --git a/arch/avr32/mach-at32ap/at32ap7000.c b/arch/avr32/mach-at32ap/at32ap7000.c index 32c7045141c2..6eeda60b8288 100644 --- a/arch/avr32/mach-at32ap/at32ap7000.c +++ b/arch/avr32/mach-at32ap/at32ap7000.c | |||
@@ -504,6 +504,21 @@ static inline void set_ebi_sfr_bits(u32 mask) | |||
504 | } | 504 | } |
505 | 505 | ||
506 | /* -------------------------------------------------------------------- | 506 | /* -------------------------------------------------------------------- |
507 | * System Timer/Counter (TC) | ||
508 | * -------------------------------------------------------------------- */ | ||
509 | static struct resource at32_systc0_resource[] = { | ||
510 | PBMEM(0xfff00c00), | ||
511 | IRQ(22), | ||
512 | }; | ||
513 | struct platform_device at32_systc0_device = { | ||
514 | .name = "systc", | ||
515 | .id = 0, | ||
516 | .resource = at32_systc0_resource, | ||
517 | .num_resources = ARRAY_SIZE(at32_systc0_resource), | ||
518 | }; | ||
519 | DEV_CLK(pclk, at32_systc0, pbb, 3); | ||
520 | |||
521 | /* -------------------------------------------------------------------- | ||
507 | * PIO | 522 | * PIO |
508 | * -------------------------------------------------------------------- */ | 523 | * -------------------------------------------------------------------- */ |
509 | 524 | ||
@@ -551,6 +566,8 @@ void __init at32_add_system_devices(void) | |||
551 | platform_device_register(&smc0_device); | 566 | platform_device_register(&smc0_device); |
552 | platform_device_register(&pdc_device); | 567 | platform_device_register(&pdc_device); |
553 | 568 | ||
569 | platform_device_register(&at32_systc0_device); | ||
570 | |||
554 | platform_device_register(&pio0_device); | 571 | platform_device_register(&pio0_device); |
555 | platform_device_register(&pio1_device); | 572 | platform_device_register(&pio1_device); |
556 | platform_device_register(&pio2_device); | 573 | platform_device_register(&pio2_device); |
@@ -1000,6 +1017,7 @@ struct clk *at32_clock_list[] = { | |||
1000 | &pio2_mck, | 1017 | &pio2_mck, |
1001 | &pio3_mck, | 1018 | &pio3_mck, |
1002 | &pio4_mck, | 1019 | &pio4_mck, |
1020 | &at32_systc0_pclk, | ||
1003 | &atmel_usart0_usart, | 1021 | &atmel_usart0_usart, |
1004 | &atmel_usart1_usart, | 1022 | &atmel_usart1_usart, |
1005 | &atmel_usart2_usart, | 1023 | &atmel_usart2_usart, |
diff --git a/arch/avr32/mach-at32ap/time-tc.c b/arch/avr32/mach-at32ap/time-tc.c new file mode 100644 index 000000000000..7ac0e94d8ed5 --- /dev/null +++ b/arch/avr32/mach-at32ap/time-tc.c | |||
@@ -0,0 +1,217 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2004-2007 Atmel Corporation | ||
3 | * | ||
4 | * Based on MIPS implementation arch/mips/kernel/time.c | ||
5 | * Copyright 2001 MontaVista Software Inc. | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License version 2 as | ||
9 | * published by the Free Software Foundation. | ||
10 | */ | ||
11 | |||
12 | #include <linux/clk.h> | ||
13 | #include <linux/clocksource.h> | ||
14 | #include <linux/time.h> | ||
15 | #include <linux/module.h> | ||
16 | #include <linux/interrupt.h> | ||
17 | #include <linux/irq.h> | ||
18 | #include <linux/kernel_stat.h> | ||
19 | #include <linux/errno.h> | ||
20 | #include <linux/init.h> | ||
21 | #include <linux/profile.h> | ||
22 | #include <linux/sysdev.h> | ||
23 | #include <linux/err.h> | ||
24 | |||
25 | #include <asm/div64.h> | ||
26 | #include <asm/sysreg.h> | ||
27 | #include <asm/io.h> | ||
28 | #include <asm/sections.h> | ||
29 | |||
30 | #include <asm/arch/time.h> | ||
31 | |||
32 | /* how many counter cycles in a jiffy? */ | ||
33 | static u32 cycles_per_jiffy; | ||
34 | |||
35 | /* the count value for the next timer interrupt */ | ||
36 | static u32 expirelo; | ||
37 | |||
38 | /* the I/O registers of the TC module */ | ||
39 | static void __iomem *ioregs; | ||
40 | |||
41 | cycle_t read_cycle_count(void) | ||
42 | { | ||
43 | return (cycle_t)timer_read(ioregs, 0, CV); | ||
44 | } | ||
45 | |||
46 | struct clocksource clocksource_avr32 = { | ||
47 | .name = "avr32", | ||
48 | .rating = 342, | ||
49 | .read = read_cycle_count, | ||
50 | .mask = CLOCKSOURCE_MASK(16), | ||
51 | .shift = 16, | ||
52 | .flags = CLOCK_SOURCE_IS_CONTINUOUS, | ||
53 | }; | ||
54 | |||
55 | static void avr32_timer_ack(void) | ||
56 | { | ||
57 | u16 count = expirelo; | ||
58 | |||
59 | /* Ack this timer interrupt and set the next one, use a u16 | ||
60 | * variable so it will wrap around correctly */ | ||
61 | count += cycles_per_jiffy; | ||
62 | expirelo = count; | ||
63 | timer_write(ioregs, 0, RC, expirelo); | ||
64 | |||
65 | /* Check to see if we have missed any timer interrupts */ | ||
66 | count = timer_read(ioregs, 0, CV); | ||
67 | if ((count - expirelo) < 0x7fff) { | ||
68 | expirelo = count + cycles_per_jiffy; | ||
69 | timer_write(ioregs, 0, RC, expirelo); | ||
70 | } | ||
71 | } | ||
72 | |||
73 | u32 avr32_hpt_read(void) | ||
74 | { | ||
75 | return timer_read(ioregs, 0, CV); | ||
76 | } | ||
77 | |||
78 | static int avr32_timer_calc_div_and_set_jiffies(struct clk *pclk) | ||
79 | { | ||
80 | unsigned int cycles_max = (clocksource_avr32.mask + 1) / 2; | ||
81 | unsigned int divs[] = { 4, 8, 16, 32 }; | ||
82 | int divs_size = sizeof(divs) / sizeof(*divs); | ||
83 | int i = 0; | ||
84 | unsigned long count_hz; | ||
85 | unsigned long shift; | ||
86 | unsigned long mult; | ||
87 | int clock_div = -1; | ||
88 | u64 tmp; | ||
89 | |||
90 | shift = clocksource_avr32.shift; | ||
91 | |||
92 | do { | ||
93 | count_hz = clk_get_rate(pclk) / divs[i]; | ||
94 | mult = clocksource_hz2mult(count_hz, shift); | ||
95 | clocksource_avr32.mult = mult; | ||
96 | |||
97 | tmp = TICK_NSEC; | ||
98 | tmp <<= shift; | ||
99 | tmp += mult / 2; | ||
100 | do_div(tmp, mult); | ||
101 | |||
102 | cycles_per_jiffy = tmp; | ||
103 | } while (cycles_per_jiffy > cycles_max && ++i < divs_size); | ||
104 | |||
105 | clock_div = i + 1; | ||
106 | |||
107 | if (clock_div > divs_size) { | ||
108 | pr_debug("timer: could not calculate clock divider\n"); | ||
109 | return -EFAULT; | ||
110 | } | ||
111 | |||
112 | /* Set the clock divider */ | ||
113 | timer_write(ioregs, 0, CMR, TIMER_BF(CMR_TCCLKS, clock_div)); | ||
114 | |||
115 | return 0; | ||
116 | } | ||
117 | |||
118 | int avr32_hpt_init(unsigned int count) | ||
119 | { | ||
120 | struct resource *regs; | ||
121 | struct clk *pclk; | ||
122 | int irq = -1; | ||
123 | int ret = 0; | ||
124 | |||
125 | ret = -ENXIO; | ||
126 | |||
127 | irq = platform_get_irq(&at32_systc0_device, 0); | ||
128 | if (irq < 0) { | ||
129 | pr_debug("timer: could not get irq\n"); | ||
130 | goto out_error; | ||
131 | } | ||
132 | |||
133 | pclk = clk_get(&at32_systc0_device.dev, "pclk"); | ||
134 | if (IS_ERR(pclk)) { | ||
135 | pr_debug("timer: could not get clk: %ld\n", PTR_ERR(pclk)); | ||
136 | goto out_error; | ||
137 | } | ||
138 | |||
139 | regs = platform_get_resource(&at32_systc0_device, IORESOURCE_MEM, 0); | ||
140 | if (!regs) { | ||
141 | pr_debug("timer: could not get resource\n"); | ||
142 | goto out_error_clk; | ||
143 | } | ||
144 | |||
145 | ioregs = ioremap(regs->start, regs->end - regs->start + 1); | ||
146 | if (!ioregs) { | ||
147 | pr_debug("timer: could not get ioregs\n"); | ||
148 | goto out_error_clk; | ||
149 | } | ||
150 | |||
151 | ret = avr32_timer_calc_div_and_set_jiffies(pclk); | ||
152 | if (ret) | ||
153 | goto out_error_io; | ||
154 | |||
155 | ret = setup_irq(irq, &timer_irqaction); | ||
156 | if (ret) { | ||
157 | pr_debug("timer: could not request irq %d: %d\n", | ||
158 | irq, ret); | ||
159 | goto out_error_io; | ||
160 | } | ||
161 | |||
162 | expirelo = (timer_read(ioregs, 0, CV) / cycles_per_jiffy + 1) | ||
163 | * cycles_per_jiffy; | ||
164 | |||
165 | /* Enable clock and interrupts on RC compare */ | ||
166 | timer_write(ioregs, 0, CCR, TIMER_BIT(CCR_CLKEN)); | ||
167 | timer_write(ioregs, 0, IER, TIMER_BIT(IER_CPCS)); | ||
168 | /* Set cycles to first interrupt */ | ||
169 | timer_write(ioregs, 0, RC, expirelo); | ||
170 | |||
171 | printk(KERN_INFO "timer: AT32AP system timer/counter at 0x%p irq %d\n", | ||
172 | ioregs, irq); | ||
173 | |||
174 | return 0; | ||
175 | |||
176 | out_error_io: | ||
177 | iounmap(ioregs); | ||
178 | out_error_clk: | ||
179 | clk_put(pclk); | ||
180 | out_error: | ||
181 | return ret; | ||
182 | } | ||
183 | |||
184 | int avr32_hpt_start(void) | ||
185 | { | ||
186 | timer_write(ioregs, 0, CCR, TIMER_BIT(CCR_SWTRG)); | ||
187 | return 0; | ||
188 | } | ||
189 | |||
190 | irqreturn_t timer_interrupt(int irq, void *dev_id) | ||
191 | { | ||
192 | unsigned int sr = timer_read(ioregs, 0, SR); | ||
193 | |||
194 | if (sr & TIMER_BIT(SR_CPCS)) { | ||
195 | /* ack timer interrupt and try to set next interrupt */ | ||
196 | avr32_timer_ack(); | ||
197 | |||
198 | /* | ||
199 | * Call the generic timer interrupt handler | ||
200 | */ | ||
201 | write_seqlock(&xtime_lock); | ||
202 | do_timer(1); | ||
203 | write_sequnlock(&xtime_lock); | ||
204 | |||
205 | /* | ||
206 | * In UP mode, we call local_timer_interrupt() to do profiling | ||
207 | * and process accounting. | ||
208 | * | ||
209 | * SMP is not supported yet. | ||
210 | */ | ||
211 | local_timer_interrupt(irq, dev_id); | ||
212 | |||
213 | return IRQ_HANDLED; | ||
214 | } | ||
215 | |||
216 | return IRQ_NONE; | ||
217 | } | ||
diff --git a/include/asm-avr32/arch-at32ap/time.h b/include/asm-avr32/arch-at32ap/time.h new file mode 100644 index 000000000000..cc8a43418a4d --- /dev/null +++ b/include/asm-avr32/arch-at32ap/time.h | |||
@@ -0,0 +1,112 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2007 Atmel Corporation | ||
3 | * | ||
4 | * This program is free software; you can redistribute it and/or modify | ||
5 | * it under the terms of the GNU General Public License version 2 as | ||
6 | * published by the Free Software Foundation. | ||
7 | */ | ||
8 | |||
9 | #ifndef _ASM_AVR32_ARCH_AT32AP_TIME_H | ||
10 | #define _ASM_AVR32_ARCH_AT32AP_TIME_H | ||
11 | |||
12 | #include <linux/platform_device.h> | ||
13 | |||
14 | extern struct irqaction timer_irqaction; | ||
15 | extern struct platform_device at32_systc0_device; | ||
16 | extern void local_timer_interrupt(int irq, void *dev_id); | ||
17 | |||
18 | #define TIMER_BCR 0x000000c0 | ||
19 | #define TIMER_BCR_SYNC 0 | ||
20 | #define TIMER_BMR 0x000000c4 | ||
21 | #define TIMER_BMR_TC0XC0S 0 | ||
22 | #define TIMER_BMR_TC1XC1S 2 | ||
23 | #define TIMER_BMR_TC2XC2S 4 | ||
24 | #define TIMER_CCR 0x00000000 | ||
25 | #define TIMER_CCR_CLKDIS 1 | ||
26 | #define TIMER_CCR_CLKEN 0 | ||
27 | #define TIMER_CCR_SWTRG 2 | ||
28 | #define TIMER_CMR 0x00000004 | ||
29 | #define TIMER_CMR_ABETRG 10 | ||
30 | #define TIMER_CMR_ACPA 16 | ||
31 | #define TIMER_CMR_ACPC 18 | ||
32 | #define TIMER_CMR_AEEVT 20 | ||
33 | #define TIMER_CMR_ASWTRG 22 | ||
34 | #define TIMER_CMR_BCPB 24 | ||
35 | #define TIMER_CMR_BCPC 26 | ||
36 | #define TIMER_CMR_BEEVT 28 | ||
37 | #define TIMER_CMR_BSWTRG 30 | ||
38 | #define TIMER_CMR_BURST 4 | ||
39 | #define TIMER_CMR_CLKI 3 | ||
40 | #define TIMER_CMR_CPCDIS 7 | ||
41 | #define TIMER_CMR_CPCSTOP 6 | ||
42 | #define TIMER_CMR_CPCTRG 14 | ||
43 | #define TIMER_CMR_EEVT 10 | ||
44 | #define TIMER_CMR_EEVTEDG 8 | ||
45 | #define TIMER_CMR_ENETRG 12 | ||
46 | #define TIMER_CMR_ETRGEDG 8 | ||
47 | #define TIMER_CMR_LDBDIS 7 | ||
48 | #define TIMER_CMR_LDBSTOP 6 | ||
49 | #define TIMER_CMR_LDRA 16 | ||
50 | #define TIMER_CMR_LDRB 18 | ||
51 | #define TIMER_CMR_TCCLKS 0 | ||
52 | #define TIMER_CMR_WAVE 15 | ||
53 | #define TIMER_CMR_WAVSEL 13 | ||
54 | #define TIMER_CV 0x00000010 | ||
55 | #define TIMER_CV_CV 0 | ||
56 | #define TIMER_IDR 0x00000028 | ||
57 | #define TIMER_IDR_COVFS 0 | ||
58 | #define TIMER_IDR_CPAS 2 | ||
59 | #define TIMER_IDR_CPBS 3 | ||
60 | #define TIMER_IDR_CPCS 4 | ||
61 | #define TIMER_IDR_ETRGS 7 | ||
62 | #define TIMER_IDR_LDRAS 5 | ||
63 | #define TIMER_IDR_LDRBS 6 | ||
64 | #define TIMER_IDR_LOVRS 1 | ||
65 | #define TIMER_IER 0x00000024 | ||
66 | #define TIMER_IER_COVFS 0 | ||
67 | #define TIMER_IER_CPAS 2 | ||
68 | #define TIMER_IER_CPBS 3 | ||
69 | #define TIMER_IER_CPCS 4 | ||
70 | #define TIMER_IER_ETRGS 7 | ||
71 | #define TIMER_IER_LDRAS 5 | ||
72 | #define TIMER_IER_LDRBS 6 | ||
73 | #define TIMER_IER_LOVRS 1 | ||
74 | #define TIMER_IMR 0x0000002c | ||
75 | #define TIMER_IMR_COVFS 0 | ||
76 | #define TIMER_IMR_CPAS 2 | ||
77 | #define TIMER_IMR_CPBS 3 | ||
78 | #define TIMER_IMR_CPCS 4 | ||
79 | #define TIMER_IMR_ETRGS 7 | ||
80 | #define TIMER_IMR_LDRAS 5 | ||
81 | #define TIMER_IMR_LDRBS 6 | ||
82 | #define TIMER_IMR_LOVRS 1 | ||
83 | #define TIMER_RA 0x00000014 | ||
84 | #define TIMER_RA_RA 0 | ||
85 | #define TIMER_RB 0x00000018 | ||
86 | #define TIMER_RB_RB 0 | ||
87 | #define TIMER_RC 0x0000001c | ||
88 | #define TIMER_RC_RC 0 | ||
89 | #define TIMER_SR 0x00000020 | ||
90 | #define TIMER_SR_CLKSTA 16 | ||
91 | #define TIMER_SR_COVFS 0 | ||
92 | #define TIMER_SR_CPAS 2 | ||
93 | #define TIMER_SR_CPBS 3 | ||
94 | #define TIMER_SR_CPCS 4 | ||
95 | #define TIMER_SR_ETRGS 7 | ||
96 | #define TIMER_SR_LDRAS 5 | ||
97 | #define TIMER_SR_LDRBS 6 | ||
98 | #define TIMER_SR_LOVRS 1 | ||
99 | #define TIMER_SR_MTIOA 17 | ||
100 | #define TIMER_SR_MTIOB 18 | ||
101 | |||
102 | /* Bit manipulation macros */ | ||
103 | #define TIMER_BIT(name) (1 << TIMER_##name) | ||
104 | #define TIMER_BF(name,value) ((value) << TIMER_##name) | ||
105 | |||
106 | /* Register access macros */ | ||
107 | #define timer_read(port,instance,reg) \ | ||
108 | __raw_readl(port + (0x40 * instance) + TIMER_##reg) | ||
109 | #define timer_write(port,instance,reg,value) \ | ||
110 | __raw_writel((value), port + (0x40 * instance) + TIMER_##reg) | ||
111 | |||
112 | #endif /* _ASM_AVR32_ARCH_AT32AP_TIME_H */ | ||