include/hw/char/cadence_uart.h

   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 "chardev/char-fe.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
  34 typedef 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
  52 static inline DeviceState *cadence_uart_create(hwaddr addr,
  53                                         qemu_irq irq,
  54                                         Chardev *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