From 74fcbd22d20a2fbc1a47a7b00cce5bf98fd7be5f Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Thu, 12 Nov 2015 09:54:55 -0800 Subject: hw/misc: Add support for ADC controller in Xilinx Zynq 7000 Add support for the Xilinx XADC core used in Zynq 7000. References: - Zynq-7000 All Programmable SoC Technical Reference Manual - 7 Series FPGAs and Zynq-7000 All Programmable SoC XADC Dual 12-Bit 1 MSPS Analog-to-Digital Converter Tested with Linux using QEMU machine xilinx-zynq-a9 with devicetree files zynq-zc702.dtb and zynq-zc706.dtb, and kernel configuration multi_v7_defconfig. Reviewed-by: Alistair Francis Signed-off-by: Guenter Roeck [ PC changes: * Changed macro names to match TRM where possible * Made programmers model macro scheme consistent * Dropped XADC_ZYNQ_ prefix on local macros * Fix ALM field width * Update threshold-comparison interrupts in _update_ints() * factored out DFIFO pushes into helper. Renamed to "push/pop" * Changed xadc_reg to 10 bits and added OOB check. * Reduced scope of MCTL reset to just stop channel coms. * Added dummy read data to write commands * Changed _ to - seperators in string names and filenames * Dropped ------------ in header comment * Catchall'ed _update_ints() in _write handler. * Minor whitespace changes. * Use ZYNQ_XADC_FIFO_DEPTH instead of ARRAY_SIZE() ] Signed-off-by: Peter Crosthwaite Tested-by: Guenter Roeck Signed-off-by: Peter Maydell --- include/hw/misc/zynq-xadc.h | 46 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 include/hw/misc/zynq-xadc.h (limited to 'include') diff --git a/include/hw/misc/zynq-xadc.h b/include/hw/misc/zynq-xadc.h new file mode 100644 index 0000000000..f1a410a376 --- /dev/null +++ b/include/hw/misc/zynq-xadc.h @@ -0,0 +1,46 @@ +/* + * Device model for Zynq ADC controller + * + * Copyright (c) 2015 Guenter Roeck + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + */ + +#ifndef ZYNQ_XADC_H +#define ZYNQ_XADC_H + +#include "hw/sysbus.h" + +#define ZYNQ_XADC_MMIO_SIZE 0x0020 +#define ZYNQ_XADC_NUM_IO_REGS (ZYNQ_XADC_MMIO_SIZE / 4) +#define ZYNQ_XADC_NUM_ADC_REGS 128 +#define ZYNQ_XADC_FIFO_DEPTH 15 + +#define TYPE_ZYNQ_XADC "xlnx,zynq-xadc" +#define ZYNQ_XADC(obj) \ + OBJECT_CHECK(ZynqXADCState, (obj), TYPE_ZYNQ_XADC) + +typedef struct ZynqXADCState { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion iomem; + + uint32_t regs[ZYNQ_XADC_NUM_IO_REGS]; + uint16_t xadc_regs[ZYNQ_XADC_NUM_ADC_REGS]; + uint16_t xadc_read_reg_previous; + uint16_t xadc_dfifo[ZYNQ_XADC_FIFO_DEPTH]; + uint16_t xadc_dfifo_entries; + + struct IRQState *qemu_irq; + +} ZynqXADCState; + +#endif /* ZYNQ_XADC_H */ -- cgit v1.2.3-55-g7522