xref: /openbmc/qemu/include/hw/timer/imx_epit.h (revision e662449a)
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 #include "qom/object.h"
36 
37 /*
38  * EPIT: Enhanced periodic interrupt timer
39  */
40 
41 #define CR_EN       (1 << 0)
42 #define CR_ENMOD    (1 << 1)
43 #define CR_OCIEN    (1 << 2)
44 #define CR_RLD      (1 << 3)
45 #define CR_PRESCALE_SHIFT (4)
46 #define CR_PRESCALE_BITS  (12)
47 #define CR_SWR      (1 << 16)
48 #define CR_IOVW     (1 << 17)
49 #define CR_DBGEN    (1 << 18)
50 #define CR_WAITEN   (1 << 19)
51 #define CR_DOZEN    (1 << 20)
52 #define CR_STOPEN   (1 << 21)
53 #define CR_CLKSRC_SHIFT (24)
54 #define CR_CLKSRC_BITS  (2)
55 
56 #define SR_OCIF     (1 << 0)
57 
58 #define EPIT_TIMER_MAX  0XFFFFFFFFUL
59 
60 #define TYPE_IMX_EPIT "imx.epit"
61 OBJECT_DECLARE_SIMPLE_TYPE(IMXEPITState, IMX_EPIT)
62 
63 struct IMXEPITState {
64     /*< private >*/
65     SysBusDevice parent_obj;
66 
67     /*< public >*/
68     ptimer_state *timer_reload;
69     ptimer_state *timer_cmp;
70     MemoryRegion  iomem;
71     IMXCCMState  *ccm;
72 
73     uint32_t cr;
74     uint32_t sr;
75     uint32_t lr;
76     uint32_t cmp;
77 
78     qemu_irq irq;
79 };
80 
81 #endif /* IMX_EPIT_H */
82