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