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