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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 <alistair.francis@xilinx.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> [ 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 <crosthwaite.peter@gmail.com> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/*
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* Device model for Zynq ADC controller
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*
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* Copyright (c) 2015 Guenter Roeck <linux@roeck-us.net>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ZYNQ_XADC_H
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#define ZYNQ_XADC_H
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#include "hw/sysbus.h"
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#define ZYNQ_XADC_MMIO_SIZE 0x0020
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#define ZYNQ_XADC_NUM_IO_REGS (ZYNQ_XADC_MMIO_SIZE / 4)
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#define ZYNQ_XADC_NUM_ADC_REGS 128
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#define ZYNQ_XADC_FIFO_DEPTH 15
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#define TYPE_ZYNQ_XADC "xlnx,zynq-xadc"
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#define ZYNQ_XADC(obj) \
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OBJECT_CHECK(ZynqXADCState, (obj), TYPE_ZYNQ_XADC)
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typedef struct ZynqXADCState {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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MemoryRegion iomem;
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uint32_t regs[ZYNQ_XADC_NUM_IO_REGS];
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uint16_t xadc_regs[ZYNQ_XADC_NUM_ADC_REGS];
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uint16_t xadc_read_reg_previous;
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uint16_t xadc_dfifo[ZYNQ_XADC_FIFO_DEPTH];
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uint16_t xadc_dfifo_entries;
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struct IRQState *qemu_irq;
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} ZynqXADCState;
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#endif /* ZYNQ_XADC_H */
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