From 5bf6f1acdda980a4ad0e8f01fe515c6d6e130fce Mon Sep 17 00:00:00 2001 From: Alistair Francis Date: Thu, 9 Sep 2021 13:55:02 +1000 Subject: hw/timer: Add SiFive PWM support This is the initial commit of the SiFive PWM timer. This is used by guest software as a timer and is included in the SiFive FU540 SoC. Signed-off-by: Justin Restivo Signed-off-by: Alexandra Clifford Signed-off-by: Amanda Strnad Signed-off-by: Alistair Francis Reviewed-by: Bin Meng Message-id: 9f70a210acbfaf0e1ea6ad311ab892ac69134d8b.1631159656.git.alistair.francis@wdc.com --- include/hw/timer/sifive_pwm.h | 62 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 include/hw/timer/sifive_pwm.h (limited to 'include') diff --git a/include/hw/timer/sifive_pwm.h b/include/hw/timer/sifive_pwm.h new file mode 100644 index 0000000..6a8cf7b --- /dev/null +++ b/include/hw/timer/sifive_pwm.h @@ -0,0 +1,62 @@ +/* + * SiFive PWM + * + * Copyright (c) 2020 Western Digital + * + * Author: Alistair Francis + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#ifndef HW_SIFIVE_PWM_H +#define HW_SIFIVE_PWM_H + +#include "hw/sysbus.h" +#include "qemu/timer.h" +#include "qom/object.h" + +#define TYPE_SIFIVE_PWM "sifive-pwm" + +#define SIFIVE_PWM(obj) \ + OBJECT_CHECK(SiFivePwmState, (obj), TYPE_SIFIVE_PWM) + +#define SIFIVE_PWM_CHANS 4 +#define SIFIVE_PWM_IRQS SIFIVE_PWM_CHANS + +typedef struct SiFivePwmState { + /* */ + SysBusDevice parent_obj; + + /* */ + MemoryRegion mmio; + QEMUTimer timer[SIFIVE_PWM_CHANS]; + /* + * if en bit(s) set, is the number of ticks when pwmcount was 0 + * if en bit(s) not set, is the number of ticks in pwmcount + */ + uint64_t tick_offset; + uint64_t freq_hz; + + uint32_t pwmcfg; + uint32_t pwmcmp[SIFIVE_PWM_CHANS]; + + qemu_irq irqs[SIFIVE_PWM_IRQS]; +} SiFivePwmState; + +#endif /* HW_SIFIVE_PWM_H */ -- cgit v1.1