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authorGuenter Roeck <linux@roeck-us.net>2015-11-12 09:54:55 -0800
committerPeter Maydell <peter.maydell@linaro.org>2015-11-12 21:30:42 +0000
commit74fcbd22d20a2fbc1a47a7b00cce5bf98fd7be5f (patch)
tree742001da3f35cd5a999fcccd7caeaa5cd52e6a1b /include
parentf3bcfc5663646f74e62fe9d3d8774b8f0adda7bf (diff)
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 <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>
Diffstat (limited to 'include')
-rw-r--r--include/hw/misc/zynq-xadc.h46
1 files changed, 46 insertions, 0 deletions
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 <linux@roeck-us.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#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 */