xref: /openbmc/qemu/include/hw/char/cadence_uart.h (revision c122bca9)
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 #define CADENCE_UART_H
21 
22 #include "hw/qdev-properties.h"
23 #include "hw/sysbus.h"
24 #include "chardev/char-fe.h"
25 #include "qapi/error.h"
26 #include "qemu/timer.h"
27 #include "qom/object.h"
28 
29 #define CADENCE_UART_RX_FIFO_SIZE           16
30 #define CADENCE_UART_TX_FIFO_SIZE           16
31 
32 #define CADENCE_UART_R_MAX (0x48/4)
33 
34 #define TYPE_CADENCE_UART "cadence_uart"
35 OBJECT_DECLARE_SIMPLE_TYPE(CadenceUARTState, CADENCE_UART)
36 
37 struct CadenceUARTState {
38     /*< private >*/
39     SysBusDevice parent_obj;
40 
41     /*< public >*/
42     MemoryRegion iomem;
43     uint32_t r[CADENCE_UART_R_MAX];
44     uint8_t rx_fifo[CADENCE_UART_RX_FIFO_SIZE];
45     uint8_t tx_fifo[CADENCE_UART_TX_FIFO_SIZE];
46     uint32_t rx_wpos;
47     uint32_t rx_count;
48     uint32_t tx_count;
49     uint64_t char_tx_time;
50     CharBackend chr;
51     qemu_irq irq;
52     QEMUTimer *fifo_trigger_handle;
53     Clock *refclk;
54 };
55 
56 #endif
57