71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/*
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* Device model for Cadence UART
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*
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* Copyright (c) 2010 Xilinx Inc.
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* Copyright (c) 2012 Peter A.G. Crosthwaite (peter.crosthwaite@petalogix.com)
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* Copyright (c) 2012 PetaLogix Pty Ltd.
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* Written by Haibing Ma
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* M.Habib
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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 CADENCE_UART_H
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#include "hw/sysbus.h"
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#include "chardev/char-fe.h"
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#include "qemu/timer.h"
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#define CADENCE_UART_RX_FIFO_SIZE 16
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#define CADENCE_UART_TX_FIFO_SIZE 16
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#define CADENCE_UART_R_MAX (0x48/4)
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#define TYPE_CADENCE_UART "cadence_uart"
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#define CADENCE_UART(obj) OBJECT_CHECK(CadenceUARTState, (obj), \
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TYPE_CADENCE_UART)
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typedef struct {
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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 r[CADENCE_UART_R_MAX];
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uint8_t rx_fifo[CADENCE_UART_RX_FIFO_SIZE];
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uint8_t tx_fifo[CADENCE_UART_TX_FIFO_SIZE];
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uint32_t rx_wpos;
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uint32_t rx_count;
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uint32_t tx_count;
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uint64_t char_tx_time;
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CharBackend chr;
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qemu_irq irq;
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QEMUTimer *fifo_trigger_handle;
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} CadenceUARTState;
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static inline DeviceState *cadence_uart_create(hwaddr addr,
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qemu_irq irq,
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Chardev *chr)
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{
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DeviceState *dev;
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SysBusDevice *s;
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dev = qdev_create(NULL, TYPE_CADENCE_UART);
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s = SYS_BUS_DEVICE(dev);
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qdev_prop_set_chr(dev, "chardev", chr);
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qdev_init_nofail(dev);
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sysbus_mmio_map(s, 0, addr);
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sysbus_connect_irq(s, 0, irq);
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return dev;
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}
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#define CADENCE_UART_H
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#endif
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