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
60typedef 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