2  * Renesas 16bit Compare-match timer
9  * SPDX-License-Identifier: GPL-2.0-or-later
13  * version 2 or later, as published by the Free Software Foundation.
28 #include "hw/qdev-properties.h"
33  *  +0 CMSTR - common control
34  *  +2 CMCR  - ch0
35  *  +4 CMCNT - ch0
36  *  +6 CMCOR - ch0
37  *  +8 CMCR  - ch1
38  * +10 CMCNT - ch1
39  * +12 CMCOR - ch1
40  * If we think that the address of CH 0 has an offset of +2,
46   FIELD(CMSTR, STR,  0, 2)
49   FIELD(CMCR, CKS,  0, 2)
51 REG16(CMCNT, 2)
58     if ((cmt->cmstr & (1 << ch)) == 0) {  in update_events()
62     next_time = cmt->cmcor[ch] - cmt->cmcnt[ch];  in update_events()
64     next_time /= cmt->input_freq;  in update_events()
66      * CKS -> div rate  in update_events()
67      *  0 -> 8 (1 << 3)  in update_events()
68      *  1 -> 32 (1 << 5)  in update_events()
69      *  2 -> 128 (1 << 7)  in update_events()
70      *  3 -> 512 (1 << 9)  in update_events()
72     next_time *= 1 << (3 + FIELD_EX16(cmt->cmcr[ch], CMCR, CKS) * 2);  in update_events()
74     timer_mod(&cmt->timer[ch], next_time);  in update_events()
81     if (cmt->cmstr & (1 << ch)) {  in read_cmcnt()
82         delta = (now - cmt->tick[ch]);  in read_cmcnt()
84         delta /= cmt->input_freq;  in read_cmcnt()
85         delta /= 1 << (3 + FIELD_EX16(cmt->cmcr[ch], CMCR, CKS) * 2);  in read_cmcnt()
86         cmt->tick[ch] = now;  in read_cmcnt()
87         return cmt->cmcnt[ch] + delta;  in read_cmcnt()
89         return cmt->cmcnt[ch];  in read_cmcnt()
102                          FIELD_EX16(cmt->cmstr, CMSTR, STR));  in cmt_read()
107             offset -= 0x02;  in cmt_read()
113                              FIELD_EX16(cmt->cmstr, CMCR, CKS));  in cmt_read()
115                              FIELD_EX16(cmt->cmstr, CMCR, CMIE));  in cmt_read()
120             return cmt->cmcor[ch];  in cmt_read()
134         timer_del(&cmt->timer[ch]);  in start_stop()
144         cmt->cmstr = FIELD_EX16(val, CMSTR, STR);  in cmt_write()
145         start_stop(cmt, 0, FIELD_EX16(cmt->cmstr, CMSTR, STR0));  in cmt_write()
146         start_stop(cmt, 1, FIELD_EX16(cmt->cmstr, CMSTR, STR1));  in cmt_write()
150             offset -= 0x02;  in cmt_write()
154             cmt->cmcr[ch] = FIELD_DP16(cmt->cmcr[ch], CMCR, CKS,  in cmt_write()
156             cmt->cmcr[ch] = FIELD_DP16(cmt->cmcr[ch], CMCR, CMIE,  in cmt_write()
159         case 2:  in cmt_write()
160             cmt->cmcnt[ch] = val;  in cmt_write()
163             cmt->cmcor[ch] = val;  in cmt_write()
171         if (FIELD_EX16(cmt->cmstr, CMSTR, STR) & (1 << ch)) {  in cmt_write()
182         .min_access_size = 2,
183         .max_access_size = 2,
186         .min_access_size = 2,
187         .max_access_size = 2,
193     cmt->cmcnt[ch] = 0;  in timer_events()
194     cmt->tick[ch] = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);  in timer_events()
196     if (FIELD_EX16(cmt->cmcr[ch], CMCR, CMIE)) {  in timer_events()
197         qemu_irq_pulse(cmt->cmi[ch]);  in timer_events()
218     cmt->cmstr = 0;  in rcmt_reset()
219     cmt->cmcr[0] = cmt->cmcr[1] = 0;  in rcmt_reset()
220     cmt->cmcnt[0] = cmt->cmcnt[1] = 0;  in rcmt_reset()
221     cmt->cmcor[0] = cmt->cmcor[1] = 0xffff;  in rcmt_reset()
230     memory_region_init_io(&cmt->memory, OBJECT(cmt), &cmt_ops,  in rcmt_init()
231                           cmt, "renesas-cmt", 0x10);  in rcmt_init()
232     sysbus_init_mmio(d, &cmt->memory);  in rcmt_init()
234     for (i = 0; i < ARRAY_SIZE(cmt->cmi); i++) {  in rcmt_init()
235         sysbus_init_irq(d, &cmt->cmi[i]);  in rcmt_init()
237     timer_init_ns(&cmt->timer[0], QEMU_CLOCK_VIRTUAL, timer_event0, cmt);  in rcmt_init()
238     timer_init_ns(&cmt->timer[1], QEMU_CLOCK_VIRTUAL, timer_event1, cmt);  in rcmt_init()
242     .name = "rx-cmt",
257     DEFINE_PROP_UINT64("input-freq", RCMTState, input_freq, 0),
265     dc->vmsd = &vmstate_rcmt;  in rcmt_class_init()