summaryrefslogtreecommitdiff
path: root/include/driver/usbh_device_driver.h
blob: 03bbd3a105233a5241dcda0e6a5d9e142a4adf8e (plain)
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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
/*
 * This file is part of the libusbhost library
 * hosted at http://github.com/libusbhost/libusbhost
 *
 * Copyright (C) 2015 Amir Hammad <amir.hammad@hotmail.com>
 *
 *
 * libusbhost is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef USBH_DEVICE_DRIVER_
#define USBH_DEVICE_DRIVER_

#include "usbh_config.h"
#include "usbh_core.h"

#include <libopencm3/usb/usbstd.h>
#include <stdint.h>

BEGIN_DECLS

enum USBH_ENDPOINT_TYPE {
	USBH_ENDPOINT_TYPE_CONTROL = 0,
	USBH_ENDPOINT_TYPE_ISOCHRONOUS = 1,
	USBH_ENDPOINT_TYPE_BULK = 2,
	USBH_ENDPOINT_TYPE_INTERRUPT = 3,
};

enum USBH_SPEED {
	USBH_SPEED_FULL = 0,
	USBH_SPEED_LOW = 1,
	USBH_SPEED_HIGH = 2,
};

enum USBH_PACKET_CALLBACK_STATUS {
	USBH_PACKET_CALLBACK_STATUS_OK = 0,
	USBH_PACKET_CALLBACK_STATUS_ERRSIZ = 1,
	USBH_PACKET_CALLBACK_STATUS_EAGAIN = 2, // -- TODO: automatic handling of transmit errors 3xTXERR->FATAL
	USBH_PACKET_CALLBACK_STATUS_EFATAL = 3
};

enum USBH_POLL_STATUS {
	USBH_POLL_STATUS_NONE,
	USBH_POLL_STATUS_DEVICE_CONNECTED,
	USBH_POLL_STATUS_DEVICE_DISCONNECTED
};

enum USBH_CONTROL_TYPE {
	USBH_CONTROL_TYPE_SETUP,
	USBH_CONTROL_TYPE_DATA
};

enum USBH_ENUM_STATE {
	USBH_ENUM_STATE_SET_ADDRESS,
	USBH_ENUM_STATE_FIRST = USBH_ENUM_STATE_SET_ADDRESS,
	USBH_ENUM_STATE_DEVICE_DT_READ_SETUP,
	USBH_ENUM_STATE_DEVICE_DT_READ_COMPLETE,
	USBH_ENUM_STATE_CONFIGURATION_DT_HEADER_READ_SETUP,
	USBH_ENUM_STATE_CONFIGURATION_DT_HEADER_READ,
	USBH_ENUM_STATE_CONFIGURATION_DT_HEADER_READ_COMPLETE,
	USBH_ENUM_STATE_CONFIGURATION_DT_READ_SETUP,
	USBH_ENUM_STATE_CONFIGURATION_DT_READ,
	USBH_ENUM_STATE_CONFIGURATION_DT_READ_COMPLETE,
	USBH_ENUM_STATE_SET_CONFIGURATION_SETUP,
	USBH_ENUM_STATE_SET_CONFIGURATION_COMPLETE,
	USBH_ENUM_STATE_FIND_DRIVER,
};

enum USBH_CONTROL_STATE {
	USBH_CONTROL_STATE_NONE,
	USBH_CONTROL_STATE_SETUP,
	USBH_CONTROL_STATE_DATA,
	USBH_CONTROL_STATE_STATUS,
};

typedef struct _usbh_device usbh_device_t;

struct _usbh_packet_callback_data {
	/// status - it is used for reporting of the errors
	enum USBH_PACKET_CALLBACK_STATUS status;

	/// count of bytes that has been actually transferred
	uint32_t transferred_length;
};
typedef struct _usbh_packet_callback_data usbh_packet_callback_data_t;

typedef void (*usbh_packet_callback_t)(usbh_device_t *dev, usbh_packet_callback_data_t status);

struct _usbh_control {
	enum USBH_CONTROL_STATE state;
	usbh_packet_callback_t callback;
	union {
		const void *out;
		void *in;
	} data;
	uint16_t data_length;
	struct usb_setup_data setup_data;
};
typedef struct _usbh_control usbh_control_t;

/**
 * @brief The _usbh_device struct
 *
 * This represents exactly one connected device.
 */
struct _usbh_device {
	/// max packet size for control endpoint(0)
	uint16_t packet_size_max0;

	/// Device's address
	int8_t address;

	/// @see USBH_SPEED
	enum USBH_SPEED speed;

	/// state used for enumeration purposes
	enum USBH_ENUM_STATE state;
	usbh_control_t control;

	/// toggle bit
	uint8_t toggle0;

	/**
	 * @brief drv - device driver used for this connected device
	 */

	const usbh_dev_driver_t *drv;
	/**
	 * @brief drvdata - device driver's private data
	 */
	void *drvdata;

	/**
	 * @brief lld - pointer to a low-level driver's instance
	 */
	const void *lld;
};
typedef struct _usbh_device usbh_device_t;

struct _usbh_packet {
	/// pointer to data
	union {
		const void *out;
		void *in;
	} data;

	/// length of the data (up to 1023)
	uint16_t datalen;

	/// Device's address
	int8_t address;

	/**
	 * @brief Endpoint type
	 * @see USBH_ENDPOINT_TYPE
	 */
	enum USBH_ENDPOINT_TYPE endpoint_type;

	enum USBH_CONTROL_TYPE control_type;

	/// Endpoint number 0..15
	uint8_t endpoint_address;

	/// Max packet size for an endpoint
	uint16_t endpoint_size_max;

	/// @see USBH_SPEED
	enum USBH_SPEED speed;
	uint8_t *toggle;

	/**
	 * @brief callback this will be called when the packet is finished - either successfuly or not.
	 */
	usbh_packet_callback_t callback;

	/**
	 * @brief callback_arg argument passed into callback
	 *
	 * Low level driver is not allowed to alter the data pointed by callback_arg
	 */
	void *callback_arg;
};
typedef struct _usbh_packet usbh_packet_t;

struct _usbh_low_level_driver {
	/**
	 * @brief init initialization routine of the low-level driver
	 *
	 *
	 * This function is called during the initialization of the library
	 *
	 * @see usbh_init()
	 */
	void (*init)(void *drvdata);

	/**
	 * write - perform a write to a device
	 * @see usbh_packet_t
	 */
	void (*write)(void *drvdata, const usbh_packet_t *packet);

	/**
	 * @brief read - perform a read from a device
	 * @see usbh_packet_t
	 */
	void (*read)(void *drvdata, usbh_packet_t *packet);

	/**
	 * @brief this is called as a part of @ref usbh_poll() routine
	 */
	enum USBH_POLL_STATUS (*poll)(void *drvdata, uint32_t time_curr_us);

	/**
	 * @brief speed of the low-level bus
	 */
	enum USBH_SPEED (*root_speed)(void *drvdata);

	/**
	 * @brief Pointer to Low-level driver data
	 *
	 * Data pointed by this pointer should not be altered by the logic other from low-level driver's logic
	 */
	void *driver_data;
};
typedef struct _usbh_low_level_driver usbh_low_level_driver_t;

struct _usbh_generic_data {
	usbh_device_t usbh_device[USBH_MAX_DEVICES];
	uint8_t usbh_buffer[BUFFER_ONE_BYTES];
};
typedef struct _usbh_generic_data usbh_generic_data_t;


#define ERROR(arg) LOG_PRINTF("UNHANDLED_ERROR %d: file: %s, line: %d",\
							arg, __FILE__, __LINE__)


/* Hub related functions */

usbh_device_t *usbh_get_free_device(const usbh_device_t *dev);
bool usbh_enum_available(void);
void device_enumeration_start(usbh_device_t *dev);

/* All devices functions */
void usbh_read(usbh_device_t *dev, usbh_packet_t *packet);
void usbh_write(usbh_device_t *dev, const usbh_packet_t *packet);

/* Helper functions used by device drivers */
void device_control(usbh_device_t *dev, usbh_packet_callback_t callback, const struct usb_setup_data *setup_data, void *data);
void device_remove(usbh_device_t *dev);

END_DECLS

#endif