1 | /* |
2 | * i.MX EPIT Timer |
3 | * |
4 | * Copyright (c) 2008 OK Labs |
5 | * Copyright (c) 2011 NICTA Pty Ltd |
6 | * Originally written by Hans Jiang |
7 | * Updated by Peter Chubb |
8 | * Updated by Jean-Christophe Dubois <jcd@tribudubois.net> |
9 | * |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
11 | * of this software and associated documentation files (the "Software"), to deal |
12 | * in the Software without restriction, including without limitation the rights |
13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
14 | * copies of the Software, and to permit persons to whom the Software is |
15 | * furnished to do so, subject to the following conditions: |
16 | * |
17 | * The above copyright notice and this permission notice shall be included in |
18 | * all copies or substantial portions of the Software. |
19 | * |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
23 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
26 | * THE SOFTWARE. |
27 | */ |
28 | |
29 | #ifndef IMX_EPIT_H |
30 | #define IMX_EPIT_H |
31 | |
32 | #include "hw/sysbus.h" |
33 | #include "hw/ptimer.h" |
34 | #include "hw/misc/imx_ccm.h" |
35 | |
36 | /* |
37 | * EPIT: Enhanced periodic interrupt timer |
38 | */ |
39 | |
40 | #define CR_EN (1 << 0) |
41 | #define CR_ENMOD (1 << 1) |
42 | #define CR_OCIEN (1 << 2) |
43 | #define CR_RLD (1 << 3) |
44 | #define CR_PRESCALE_SHIFT (4) |
45 | #define CR_PRESCALE_MASK (0xfff) |
46 | #define CR_SWR (1 << 16) |
47 | #define CR_IOVW (1 << 17) |
48 | #define CR_DBGEN (1 << 18) |
49 | #define CR_WAITEN (1 << 19) |
50 | #define CR_DOZEN (1 << 20) |
51 | #define CR_STOPEN (1 << 21) |
52 | #define CR_CLKSRC_SHIFT (24) |
53 | #define CR_CLKSRC_MASK (0x3 << CR_CLKSRC_SHIFT) |
54 | |
55 | #define EPIT_TIMER_MAX 0XFFFFFFFFUL |
56 | |
57 | #define TYPE_IMX_EPIT "imx.epit" |
58 | #define IMX_EPIT(obj) OBJECT_CHECK(IMXEPITState, (obj), TYPE_IMX_EPIT) |
59 | |
60 | typedef struct IMXEPITState{ |
61 | /*< private >*/ |
62 | SysBusDevice parent_obj; |
63 | |
64 | /*< public >*/ |
65 | ptimer_state *timer_reload; |
66 | ptimer_state *timer_cmp; |
67 | MemoryRegion iomem; |
68 | IMXCCMState *ccm; |
69 | |
70 | uint32_t cr; |
71 | uint32_t sr; |
72 | uint32_t lr; |
73 | uint32_t cmp; |
74 | uint32_t cnt; |
75 | |
76 | uint32_t freq; |
77 | qemu_irq irq; |
78 | } IMXEPITState; |
79 | |
80 | #endif /* IMX_EPIT_H */ |
81 | |