Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * arch/m68k/mvme147/config.c | |
3 | * | |
4 | * Copyright (C) 1996 Dave Frascone [chaos@mindspring.com] | |
5 | * Cloned from Richard Hirst [richard@sleepie.demon.co.uk] | |
6 | * | |
7 | * Based on: | |
8 | * | |
9 | * Copyright (C) 1993 Hamish Macdonald | |
10 | * | |
11 | * This file is subject to the terms and conditions of the GNU General Public | |
12 | * License. See the file README.legal in the main directory of this archive | |
13 | * for more details. | |
14 | */ | |
15 | ||
16 | #include <linux/types.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/tty.h> | |
fc4c47b3 | 20 | #include <linux/clocksource.h> |
1da177e4 LT |
21 | #include <linux/console.h> |
22 | #include <linux/linkage.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/major.h> | |
1da177e4 LT |
25 | #include <linux/rtc.h> |
26 | #include <linux/interrupt.h> | |
27 | ||
28 | #include <asm/bootinfo.h> | |
4c3c522b | 29 | #include <asm/bootinfo-vme.h> |
abe48101 | 30 | #include <asm/byteorder.h> |
1da177e4 LT |
31 | #include <asm/setup.h> |
32 | #include <asm/irq.h> | |
33 | #include <asm/traps.h> | |
1da177e4 LT |
34 | #include <asm/machdep.h> |
35 | #include <asm/mvme147hw.h> | |
91d7b75a | 36 | #include <asm/config.h> |
1da177e4 LT |
37 | |
38 | ||
1da177e4 | 39 | static void mvme147_get_model(char *model); |
f9a01539 | 40 | extern void mvme147_sched_init(void); |
1da177e4 | 41 | extern int mvme147_hwclk (int, struct rtc_time *); |
1da177e4 | 42 | extern void mvme147_reset (void); |
1da177e4 LT |
43 | |
44 | ||
45 | static int bcd2int (unsigned char b); | |
46 | ||
1da177e4 | 47 | |
a4df02a2 | 48 | int __init mvme147_parse_bootinfo(const struct bi_record *bi) |
1da177e4 | 49 | { |
abe48101 GU |
50 | uint16_t tag = be16_to_cpu(bi->tag); |
51 | if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO) | |
1da177e4 LT |
52 | return 0; |
53 | else | |
54 | return 1; | |
55 | } | |
56 | ||
57 | void mvme147_reset(void) | |
58 | { | |
0c29d757 | 59 | pr_info("\r\n\nCalled mvme147_reset\r\n"); |
1da177e4 LT |
60 | m147_pcc->watchdog = 0x0a; /* Clear timer */ |
61 | m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */ | |
62 | while (1) | |
63 | ; | |
64 | } | |
65 | ||
66 | static void mvme147_get_model(char *model) | |
67 | { | |
68 | sprintf(model, "Motorola MVME147"); | |
69 | } | |
70 | ||
200a3d35 RZ |
71 | /* |
72 | * This function is called during kernel startup to initialize | |
73 | * the mvme147 IRQ handling routines. | |
74 | */ | |
75 | ||
66a3f820 | 76 | void __init mvme147_init_IRQ(void) |
200a3d35 | 77 | { |
f30a6484 | 78 | m68k_setup_user_interrupt(VEC_USER, 192); |
200a3d35 | 79 | } |
1da177e4 LT |
80 | |
81 | void __init config_mvme147(void) | |
82 | { | |
1da177e4 LT |
83 | mach_sched_init = mvme147_sched_init; |
84 | mach_init_IRQ = mvme147_init_IRQ; | |
1da177e4 | 85 | mach_hwclk = mvme147_hwclk; |
1da177e4 | 86 | mach_reset = mvme147_reset; |
1da177e4 | 87 | mach_get_model = mvme147_get_model; |
1da177e4 LT |
88 | |
89 | /* Board type is only set by newer versions of vmelilo/tftplilo */ | |
90 | if (!vme_brdtype) | |
91 | vme_brdtype = VME_TYPE_MVME147; | |
92 | } | |
93 | ||
fc4c47b3 FT |
94 | static u64 mvme147_read_clk(struct clocksource *cs); |
95 | ||
96 | static struct clocksource mvme147_clk = { | |
97 | .name = "pcc", | |
98 | .rating = 250, | |
99 | .read = mvme147_read_clk, | |
100 | .mask = CLOCKSOURCE_MASK(32), | |
101 | .flags = CLOCK_SOURCE_IS_CONTINUOUS, | |
102 | }; | |
103 | ||
104 | static u32 clk_total; | |
105 | ||
106 | #define PCC_TIMER_CLOCK_FREQ 160000 | |
107 | #define PCC_TIMER_CYCLES (PCC_TIMER_CLOCK_FREQ / HZ) | |
108 | #define PCC_TIMER_PRELOAD (0x10000 - PCC_TIMER_CYCLES) | |
1da177e4 LT |
109 | |
110 | /* Using pcc tick timer 1 */ | |
111 | ||
2850bc27 | 112 | static irqreturn_t mvme147_timer_int (int irq, void *dev_id) |
1da177e4 | 113 | { |
1efdd4bd FT |
114 | unsigned long flags; |
115 | ||
116 | local_irq_save(flags); | |
43262178 FT |
117 | m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN | |
118 | PCC_TIMER_TIC_EN; | |
119 | m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR | | |
120 | PCC_LEVEL_TIMER1; | |
fc4c47b3 | 121 | clk_total += PCC_TIMER_CYCLES; |
42f1d57f | 122 | legacy_timer_tick(1); |
1efdd4bd FT |
123 | local_irq_restore(flags); |
124 | ||
125 | return IRQ_HANDLED; | |
1da177e4 LT |
126 | } |
127 | ||
128 | ||
f9a01539 | 129 | void mvme147_sched_init (void) |
1da177e4 | 130 | { |
fc4c47b3 | 131 | if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, IRQF_TIMER, |
42f1d57f | 132 | "timer 1", NULL)) |
41904f8f | 133 | pr_err("Couldn't register timer interrupt\n"); |
1da177e4 LT |
134 | |
135 | /* Init the clock with a value */ | |
fc4c47b3 | 136 | /* The clock counter increments until 0xFFFF then reloads */ |
1da177e4 | 137 | m147_pcc->t1_preload = PCC_TIMER_PRELOAD; |
43262178 FT |
138 | m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN | |
139 | PCC_TIMER_TIC_EN; | |
140 | m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR | | |
141 | PCC_LEVEL_TIMER1; | |
fc4c47b3 FT |
142 | |
143 | clocksource_register_hz(&mvme147_clk, PCC_TIMER_CLOCK_FREQ); | |
1da177e4 LT |
144 | } |
145 | ||
fc4c47b3 | 146 | static u64 mvme147_read_clk(struct clocksource *cs) |
1da177e4 | 147 | { |
fc4c47b3 | 148 | unsigned long flags; |
7529b90d FT |
149 | u8 overflow, tmp; |
150 | u16 count; | |
fc4c47b3 | 151 | u32 ticks; |
1da177e4 | 152 | |
fc4c47b3 | 153 | local_irq_save(flags); |
7529b90d FT |
154 | tmp = m147_pcc->t1_cntrl >> 4; |
155 | count = m147_pcc->t1_count; | |
156 | overflow = m147_pcc->t1_cntrl >> 4; | |
157 | if (overflow != tmp) | |
158 | count = m147_pcc->t1_count; | |
159 | count -= PCC_TIMER_PRELOAD; | |
160 | ticks = count + overflow * PCC_TIMER_CYCLES; | |
161 | ticks += clk_total; | |
fc4c47b3 FT |
162 | local_irq_restore(flags); |
163 | ||
164 | return ticks; | |
1da177e4 LT |
165 | } |
166 | ||
167 | static int bcd2int (unsigned char b) | |
168 | { | |
169 | return ((b>>4)*10 + (b&15)); | |
170 | } | |
171 | ||
172 | int mvme147_hwclk(int op, struct rtc_time *t) | |
173 | { | |
1da177e4 LT |
174 | if (!op) { |
175 | m147_rtc->ctrl = RTC_READ; | |
176 | t->tm_year = bcd2int (m147_rtc->bcd_year); | |
b65769fc | 177 | t->tm_mon = bcd2int(m147_rtc->bcd_mth) - 1; |
1da177e4 LT |
178 | t->tm_mday = bcd2int (m147_rtc->bcd_dom); |
179 | t->tm_hour = bcd2int (m147_rtc->bcd_hr); | |
180 | t->tm_min = bcd2int (m147_rtc->bcd_min); | |
181 | t->tm_sec = bcd2int (m147_rtc->bcd_sec); | |
182 | m147_rtc->ctrl = 0; | |
b65769fc FT |
183 | if (t->tm_year < 70) |
184 | t->tm_year += 100; | |
a7b68ed1 GU |
185 | } else { |
186 | /* FIXME Setting the time is not yet supported */ | |
187 | return -EOPNOTSUPP; | |
1da177e4 LT |
188 | } |
189 | return 0; | |
190 | } |