Commit | Line | Data |
---|---|---|
d94f944e AV |
1 | /* |
2 | * Copyright 1999 - 2003 ARM Limited | |
3 | * Copyright 2000 Deep Blue Solutions Ltd | |
4 | * Copyright 2008 Cavium Networks | |
5 | * | |
6 | * This file is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License, Version 2, as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/init.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/clockchips.h> | |
14 | #include <linux/io.h> | |
15 | #include <asm/mach/map.h> | |
16 | #include <asm/mach/time.h> | |
17 | #include <asm/mach/irq.h> | |
18 | #include <asm/hardware/gic.h> | |
19 | #include <mach/cns3xxx.h> | |
20 | #include "core.h" | |
21 | ||
22 | static struct map_desc cns3xxx_io_desc[] __initdata = { | |
23 | { | |
24 | .virtual = CNS3XXX_TC11MP_TWD_BASE_VIRT, | |
25 | .pfn = __phys_to_pfn(CNS3XXX_TC11MP_TWD_BASE), | |
26 | .length = SZ_4K, | |
27 | .type = MT_DEVICE, | |
28 | }, { | |
29 | .virtual = CNS3XXX_TC11MP_GIC_CPU_BASE_VIRT, | |
30 | .pfn = __phys_to_pfn(CNS3XXX_TC11MP_GIC_CPU_BASE), | |
31 | .length = SZ_4K, | |
32 | .type = MT_DEVICE, | |
33 | }, { | |
34 | .virtual = CNS3XXX_TC11MP_GIC_DIST_BASE_VIRT, | |
35 | .pfn = __phys_to_pfn(CNS3XXX_TC11MP_GIC_DIST_BASE), | |
36 | .length = SZ_4K, | |
37 | .type = MT_DEVICE, | |
38 | }, { | |
39 | .virtual = CNS3XXX_TIMER1_2_3_BASE_VIRT, | |
40 | .pfn = __phys_to_pfn(CNS3XXX_TIMER1_2_3_BASE), | |
41 | .length = SZ_4K, | |
42 | .type = MT_DEVICE, | |
43 | }, { | |
44 | .virtual = CNS3XXX_GPIOA_BASE_VIRT, | |
45 | .pfn = __phys_to_pfn(CNS3XXX_GPIOA_BASE), | |
46 | .length = SZ_4K, | |
47 | .type = MT_DEVICE, | |
48 | }, { | |
49 | .virtual = CNS3XXX_GPIOB_BASE_VIRT, | |
50 | .pfn = __phys_to_pfn(CNS3XXX_GPIOB_BASE), | |
51 | .length = SZ_4K, | |
52 | .type = MT_DEVICE, | |
53 | }, { | |
54 | .virtual = CNS3XXX_MISC_BASE_VIRT, | |
55 | .pfn = __phys_to_pfn(CNS3XXX_MISC_BASE), | |
56 | .length = SZ_4K, | |
57 | .type = MT_DEVICE, | |
58 | }, { | |
59 | .virtual = CNS3XXX_PM_BASE_VIRT, | |
60 | .pfn = __phys_to_pfn(CNS3XXX_PM_BASE), | |
61 | .length = SZ_4K, | |
62 | .type = MT_DEVICE, | |
63 | }, | |
64 | }; | |
65 | ||
66 | void __init cns3xxx_map_io(void) | |
67 | { | |
68 | iotable_init(cns3xxx_io_desc, ARRAY_SIZE(cns3xxx_io_desc)); | |
69 | } | |
70 | ||
71 | /* used by entry-macro.S */ | |
d94f944e AV |
72 | void __init cns3xxx_init_irq(void) |
73 | { | |
b580b899 | 74 | gic_init(0, 29, __io(CNS3XXX_TC11MP_GIC_DIST_BASE_VIRT), |
ff2e27ae | 75 | __io(CNS3XXX_TC11MP_GIC_CPU_BASE_VIRT)); |
d94f944e AV |
76 | } |
77 | ||
78 | void cns3xxx_power_off(void) | |
79 | { | |
80 | u32 __iomem *pm_base = __io(CNS3XXX_PM_BASE_VIRT); | |
81 | u32 clkctrl; | |
82 | ||
83 | printk(KERN_INFO "powering system down...\n"); | |
84 | ||
85 | clkctrl = readl(pm_base + PM_SYS_CLK_CTRL_OFFSET); | |
86 | clkctrl &= 0xfffff1ff; | |
87 | clkctrl |= (0x5 << 9); /* Hibernate */ | |
88 | writel(clkctrl, pm_base + PM_SYS_CLK_CTRL_OFFSET); | |
89 | ||
90 | } | |
91 | ||
92 | /* | |
93 | * Timer | |
94 | */ | |
95 | static void __iomem *cns3xxx_tmr1; | |
96 | ||
97 | static void cns3xxx_timer_set_mode(enum clock_event_mode mode, | |
98 | struct clock_event_device *clk) | |
99 | { | |
100 | unsigned long ctrl = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
101 | int pclk = cns3xxx_cpu_clock() / 8; | |
102 | int reload; | |
103 | ||
104 | switch (mode) { | |
105 | case CLOCK_EVT_MODE_PERIODIC: | |
106 | reload = pclk * 20 / (3 * HZ) * 0x25000; | |
107 | writel(reload, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); | |
108 | ctrl |= (1 << 0) | (1 << 2) | (1 << 9); | |
109 | break; | |
110 | case CLOCK_EVT_MODE_ONESHOT: | |
111 | /* period set, and timer enabled in 'next_event' hook */ | |
112 | ctrl |= (1 << 2) | (1 << 9); | |
113 | break; | |
114 | case CLOCK_EVT_MODE_UNUSED: | |
115 | case CLOCK_EVT_MODE_SHUTDOWN: | |
116 | default: | |
117 | ctrl = 0; | |
118 | } | |
119 | ||
120 | writel(ctrl, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
121 | } | |
122 | ||
123 | static int cns3xxx_timer_set_next_event(unsigned long evt, | |
124 | struct clock_event_device *unused) | |
125 | { | |
126 | unsigned long ctrl = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
127 | ||
128 | writel(evt, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); | |
129 | writel(ctrl | (1 << 0), cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static struct clock_event_device cns3xxx_tmr1_clockevent = { | |
135 | .name = "cns3xxx timer1", | |
136 | .shift = 8, | |
137 | .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, | |
138 | .set_mode = cns3xxx_timer_set_mode, | |
139 | .set_next_event = cns3xxx_timer_set_next_event, | |
140 | .rating = 350, | |
141 | .cpumask = cpu_all_mask, | |
142 | }; | |
143 | ||
144 | static void __init cns3xxx_clockevents_init(unsigned int timer_irq) | |
145 | { | |
146 | cns3xxx_tmr1_clockevent.irq = timer_irq; | |
147 | cns3xxx_tmr1_clockevent.mult = | |
148 | div_sc((cns3xxx_cpu_clock() >> 3) * 1000000, NSEC_PER_SEC, | |
149 | cns3xxx_tmr1_clockevent.shift); | |
150 | cns3xxx_tmr1_clockevent.max_delta_ns = | |
151 | clockevent_delta2ns(0xffffffff, &cns3xxx_tmr1_clockevent); | |
152 | cns3xxx_tmr1_clockevent.min_delta_ns = | |
153 | clockevent_delta2ns(0xf, &cns3xxx_tmr1_clockevent); | |
154 | ||
155 | clockevents_register_device(&cns3xxx_tmr1_clockevent); | |
156 | } | |
157 | ||
158 | /* | |
159 | * IRQ handler for the timer | |
160 | */ | |
161 | static irqreturn_t cns3xxx_timer_interrupt(int irq, void *dev_id) | |
162 | { | |
163 | struct clock_event_device *evt = &cns3xxx_tmr1_clockevent; | |
164 | u32 __iomem *stat = cns3xxx_tmr1 + TIMER1_2_INTERRUPT_STATUS_OFFSET; | |
165 | u32 val; | |
166 | ||
167 | /* Clear the interrupt */ | |
168 | val = readl(stat); | |
169 | writel(val & ~(1 << 2), stat); | |
170 | ||
171 | evt->event_handler(evt); | |
172 | ||
173 | return IRQ_HANDLED; | |
174 | } | |
175 | ||
176 | static struct irqaction cns3xxx_timer_irq = { | |
177 | .name = "timer", | |
178 | .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, | |
179 | .handler = cns3xxx_timer_interrupt, | |
180 | }; | |
181 | ||
182 | /* | |
183 | * Set up the clock source and clock events devices | |
184 | */ | |
185 | static void __init __cns3xxx_timer_init(unsigned int timer_irq) | |
186 | { | |
187 | u32 val; | |
188 | u32 irq_mask; | |
189 | ||
190 | /* | |
191 | * Initialise to a known state (all timers off) | |
192 | */ | |
193 | ||
194 | /* disable timer1 and timer2 */ | |
195 | writel(0, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
196 | /* stop free running timer3 */ | |
197 | writel(0, cns3xxx_tmr1 + TIMER_FREERUN_CONTROL_OFFSET); | |
198 | ||
199 | /* timer1 */ | |
200 | writel(0x5C800, cns3xxx_tmr1 + TIMER1_COUNTER_OFFSET); | |
201 | writel(0x5C800, cns3xxx_tmr1 + TIMER1_AUTO_RELOAD_OFFSET); | |
202 | ||
203 | writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V1_OFFSET); | |
204 | writel(0, cns3xxx_tmr1 + TIMER1_MATCH_V2_OFFSET); | |
205 | ||
206 | /* mask irq, non-mask timer1 overflow */ | |
207 | irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); | |
208 | irq_mask &= ~(1 << 2); | |
209 | irq_mask |= 0x03; | |
210 | writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); | |
211 | ||
212 | /* down counter */ | |
213 | val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
214 | val |= (1 << 9); | |
215 | writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
216 | ||
217 | /* timer2 */ | |
218 | writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V1_OFFSET); | |
219 | writel(0, cns3xxx_tmr1 + TIMER2_MATCH_V2_OFFSET); | |
220 | ||
221 | /* mask irq */ | |
222 | irq_mask = readl(cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); | |
223 | irq_mask |= ((1 << 3) | (1 << 4) | (1 << 5)); | |
224 | writel(irq_mask, cns3xxx_tmr1 + TIMER1_2_INTERRUPT_MASK_OFFSET); | |
225 | ||
226 | /* down counter */ | |
227 | val = readl(cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
228 | val |= (1 << 10); | |
229 | writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET); | |
230 | ||
231 | /* Make irqs happen for the system timer */ | |
232 | setup_irq(timer_irq, &cns3xxx_timer_irq); | |
233 | ||
234 | cns3xxx_clockevents_init(timer_irq); | |
235 | } | |
236 | ||
237 | static void __init cns3xxx_timer_init(void) | |
238 | { | |
239 | cns3xxx_tmr1 = __io(CNS3XXX_TIMER1_2_3_BASE_VIRT); | |
240 | ||
241 | __cns3xxx_timer_init(IRQ_CNS3XXX_TIMER0); | |
242 | } | |
243 | ||
244 | struct sys_timer cns3xxx_timer = { | |
245 | .init = cns3xxx_timer_init, | |
246 | }; |