Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
[qemu.git] / include / hw / char / shakti_uart.h
1 /*
2 * SHAKTI UART
3 *
4 * Copyright (c) 2021 Vijai Kumar K <vijai@behindbytes.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #ifndef HW_SHAKTI_UART_H
26 #define HW_SHAKTI_UART_H
27
28 #include "hw/sysbus.h"
29 #include "chardev/char-fe.h"
30
31 #define SHAKTI_UART_BAUD 0x00
32 #define SHAKTI_UART_TX 0x04
33 #define SHAKTI_UART_RX 0x08
34 #define SHAKTI_UART_STATUS 0x0C
35 #define SHAKTI_UART_DELAY 0x10
36 #define SHAKTI_UART_CONTROL 0x14
37 #define SHAKTI_UART_INT_EN 0x18
38 #define SHAKTI_UART_IQ_CYCLES 0x1C
39 #define SHAKTI_UART_RX_THRES 0x20
40
41 #define SHAKTI_UART_STATUS_TX_EMPTY (1 << 0)
42 #define SHAKTI_UART_STATUS_TX_FULL (1 << 1)
43 #define SHAKTI_UART_STATUS_RX_NOT_EMPTY (1 << 2)
44 #define SHAKTI_UART_STATUS_RX_FULL (1 << 3)
45 /* 9600 8N1 is the default setting */
46 /* Reg value = (50000000 Hz)/(16 * 9600)*/
47 #define SHAKTI_UART_BAUD_DEFAULT 0x0145
48 #define SHAKTI_UART_CONTROL_DEFAULT 0x0100
49
50 #define TYPE_SHAKTI_UART "shakti-uart"
51 #define SHAKTI_UART(obj) \
52 OBJECT_CHECK(ShaktiUartState, (obj), TYPE_SHAKTI_UART)
53
54 typedef struct {
55 /* <private> */
56 SysBusDevice parent_obj;
57
58 /* <public> */
59 MemoryRegion mmio;
60
61 uint32_t uart_baud;
62 uint32_t uart_tx;
63 uint32_t uart_rx;
64 uint32_t uart_status;
65 uint32_t uart_delay;
66 uint32_t uart_control;
67 uint32_t uart_interrupt;
68 uint32_t uart_iq_cycles;
69 uint32_t uart_rx_threshold;
70
71 CharBackend chr;
72 } ShaktiUartState;
73
74 #endif /* HW_SHAKTI_UART_H */