1 | /* |
2 | * Microsemi SmartFusion2 Timer. |
3 | * |
4 | * Copyright (c) 2017 Subbaraya Sundeep <sundeep.lkml@gmail.com> |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal |
8 | * in the Software without restriction, including without limitation the rights |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
10 | * copies of the Software, and to permit persons to whom the Software is |
11 | * furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
22 | * THE SOFTWARE. |
23 | */ |
24 | |
25 | #ifndef HW_MSS_TIMER_H |
26 | #define HW_MSS_TIMER_H |
27 | |
28 | #include "hw/sysbus.h" |
29 | #include "hw/ptimer.h" |
30 | |
31 | #define TYPE_MSS_TIMER "mss-timer" |
32 | #define MSS_TIMER(obj) OBJECT_CHECK(MSSTimerState, \ |
33 | (obj), TYPE_MSS_TIMER) |
34 | |
35 | /* |
36 | * There are two 32-bit down counting timers. |
37 | * Timers 1 and 2 can be concatenated into a single 64-bit Timer |
38 | * that operates either in Periodic mode or in One-shot mode. |
39 | * Writing 1 to the TIM64_MODE register bit 0 sets the Timers in 64-bit mode. |
40 | * In 64-bit mode, writing to the 32-bit registers has no effect. |
41 | * Similarly, in 32-bit mode, writing to the 64-bit mode registers |
42 | * has no effect. Only two 32-bit timers are supported currently. |
43 | */ |
44 | #define NUM_TIMERS 2 |
45 | |
46 | #define R_TIM1_MAX 6 |
47 | |
48 | struct Msf2Timer { |
49 | QEMUBH *bh; |
50 | ptimer_state *ptimer; |
51 | |
52 | uint32_t regs[R_TIM1_MAX]; |
53 | qemu_irq irq; |
54 | }; |
55 | |
56 | typedef struct MSSTimerState { |
57 | SysBusDevice parent_obj; |
58 | |
59 | MemoryRegion mmio; |
60 | uint32_t freq_hz; |
61 | struct Msf2Timer timers[NUM_TIMERS]; |
62 | } MSSTimerState; |
63 | |
64 | #endif /* HW_MSS_TIMER_H */ |
65 | |