xref: /openbmc/qemu/include/hw/ssi/mss-spi.h (revision c122bca9)
1 /*
2  * Microsemi SmartFusion2 SPI
3  *
4  * Copyright (c) 2017 Subbaraya Sundeep <sundeep.lkml@gmail.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_MSS_SPI_H
26 #define HW_MSS_SPI_H
27 
28 #include "hw/sysbus.h"
29 #include "hw/ssi/ssi.h"
30 #include "qemu/fifo32.h"
31 #include "qom/object.h"
32 
33 #define TYPE_MSS_SPI   "mss-spi"
34 OBJECT_DECLARE_SIMPLE_TYPE(MSSSpiState, MSS_SPI)
35 
36 #define R_SPI_MAX             16
37 
38 struct MSSSpiState {
39     SysBusDevice parent_obj;
40 
41     MemoryRegion mmio;
42 
43     qemu_irq irq;
44 
45     qemu_irq cs_line;
46 
47     SSIBus *spi;
48 
49     Fifo32 rx_fifo;
50     Fifo32 tx_fifo;
51 
52     int fifo_depth;
53     uint32_t frame_count;
54     bool enabled;
55 
56     uint32_t regs[R_SPI_MAX];
57 };
58 
59 #endif /* HW_MSS_SPI_H */
60