1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SYSTEM_PERIPHERALMANAGER_DAEMON_SPI_MANAGER_H_
#define SYSTEM_PERIPHERALMANAGER_DAEMON_SPI_MANAGER_H_
#include <stdint.h>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include <base/macros.h>
#include "peripheralmanager/constants.h"
#include "pin_mux_manager.h"
#include "spi_driver.h"
namespace android {
struct SpiDevBus {
SpiDevBus(uint32_t b, uint32_t c) : bus(b), cs(c) {}
uint32_t bus;
uint32_t cs;
std::string mux;
std::string mux_group;
std::unique_ptr<SpiDriverInterface> driver_;
};
class SpiDevice {
public:
SpiDevice(SpiDevBus* bus) : bus_(bus) {}
~SpiDevice() {
if (!bus_->mux.empty()) {
PinMuxManager::GetPinMuxManager()->ReleaseSource(bus_->mux,
bus_->mux_group);
}
bus_->driver_.reset();
}
bool WriteByte(uint8_t val) { return Transfer(&val, nullptr, sizeof(val)); }
bool WriteBuffer(const void* data, size_t len) {
return Transfer(data, nullptr, len);
}
bool Transfer(const void* tx_data, void* rx_data, size_t len) {
return bus_->driver_->Transfer(tx_data, rx_data, len);
}
bool SetFrequency(uint32_t speed_hz) {
return bus_->driver_->SetFrequency(speed_hz);
}
bool SetMode(SpiMode mode) { return bus_->driver_->SetMode(mode); }
bool SetBitJustification(bool lsb_first) {
return bus_->driver_->SetBitJustification(lsb_first);
}
bool SetBitsPerWord(uint8_t bits_per_word) {
return bus_->driver_->SetBitsPerWord(bits_per_word);
}
bool SetDelay(uint16_t delay_usecs) {
return bus_->driver_->SetDelay(delay_usecs);
}
private:
SpiDevBus* bus_;
};
class SpiManager {
public:
friend class SpiManagerTest;
~SpiManager();
// Get the singleton.
static SpiManager* GetSpiManager();
// Reset the Spi manager.
static void ResetSpiManager();
// Used by the BSP to tell PMan of an SPI bus
// that can be used by a PMan client.
// Will return false if the bus has already been registered.
bool RegisterSpiDevBus(const std::string& name, uint32_t bus, uint32_t cs);
std::vector<std::string> GetSpiDevBuses();
bool HasSpiDevBus(const std::string& name);
bool SetPinMux(const std::string& name, const std::string& mux);
bool SetPinMuxWithGroup(const std::string& name,
const std::string& mux,
const std::string& group);
bool RegisterDriver(std::unique_ptr<SpiDriverInfoBase> driver_info);
std::unique_ptr<SpiDevice> OpenSpiDevice(const std::string& name);
private:
SpiManager();
std::map<std::string, std::unique_ptr<SpiDriverInfoBase>> driver_infos_;
std::map<std::string, SpiDevBus> spidev_buses_;
DISALLOW_COPY_AND_ASSIGN(SpiManager);
};
} // namespace android
#endif // SYSTEM_PERIPHERALMANAGER_DAEMON_SPI_MANAGER_H_
|
