LXR qemu/include/hw/char/cadence

   1/*
   2 * Device model for Cadence UART
   3 *
   4 * Copyright (c) 2010 Xilinx Inc.
   5 * Copyright (c) 2012 Peter A.G. Crosthwaite (peter.crosthwaite@petalogix.com)
   6 * Copyright (c) 2012 PetaLogix Pty Ltd.
   7 * Written by Haibing Ma
   8 *            M.Habib
   9 *
  10 * This program is free software; you can redistribute it and/or
  11 * modify it under the terms of the GNU General Public License
  12 * as published by the Free Software Foundation; either version
  13 * 2 of the License, or (at your option) any later version.
  14 *
  15 * You should have received a copy of the GNU General Public License along
  16 * with this program; if not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19#ifndef CADENCE_UART_H
  20
  21#include "hw/sysbus.h"
  22#include "sysemu/char.h"
  23#include "qemu/timer.h"
  24
  25#define CADENCE_UART_RX_FIFO_SIZE           16
  26#define CADENCE_UART_TX_FIFO_SIZE           16
  27
  28#define CADENCE_UART_R_MAX (0x48/4)
  29
  30#define TYPE_CADENCE_UART "cadence_uart"
  31#define CADENCE_UART(obj) OBJECT_CHECK(CadenceUARTState, (obj), \
  32                                       TYPE_CADENCE_UART)
  33
  34typedef struct {
  35    /*< private >*/
  36    SysBusDevice parent_obj;
  37
  38    /*< public >*/
  39    MemoryRegion iomem;
  40    uint32_t r[CADENCE_UART_R_MAX];
  41    uint8_t rx_fifo[CADENCE_UART_RX_FIFO_SIZE];
  42    uint8_t tx_fifo[CADENCE_UART_TX_FIFO_SIZE];
  43    uint32_t rx_wpos;
  44    uint32_t rx_count;
  45    uint32_t tx_count;
  46    uint64_t char_tx_time;
  47    CharBackend chr;
  48    qemu_irq irq;
  49    QEMUTimer *fifo_trigger_handle;
  50} CadenceUARTState;
  51
  52static inline DeviceState *cadence_uart_create(hwaddr addr,
  53                                        qemu_irq irq,
  54                                        CharDriverState *chr)
  55{
  56    DeviceState *dev;
  57    SysBusDevice *s;
  58
  59    dev = qdev_create(NULL, TYPE_CADENCE_UART);
  60    s = SYS_BUS_DEVICE(dev);
  61    qdev_prop_set_chr(dev, "chardev", chr);
  62    qdev_init_nofail(dev);
  63    sysbus_mmio_map(s, 0, addr);
  64    sysbus_connect_irq(s, 0, irq);
  65
  66    return dev;
  67}
  68
  69#define CADENCE_UART_H
  70#endif
  71