summaryrefslogtreecommitdiff
path: root/payloads/libpayload/include/usb/usb.h
blob: a3516904182602558d2c289af1b9c9d29661d7c6 (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
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
/*
 * This file is part of the libpayload project.
 *
 * Copyright (C) 2008 coresystems GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef __USB_H
#define __USB_H
#include <libpayload.h>
#include <pci/pci.h>

typedef enum { host_to_device = 0, device_to_host = 1 } dev_req_dir;
typedef enum { standard_type = 0, class_type = 1, vendor_type =
		2, reserved_type = 3
} dev_req_type;
typedef enum { dev_recp = 0, iface_recp = 1, endp_recp = 2, other_recp = 3
} dev_req_recp;

typedef enum {
	GET_STATUS = 0,
	CLEAR_FEATURE = 1,
	SET_FEATURE = 3,
	SET_ADDRESS = 5,
	GET_DESCRIPTOR = 6,
	SET_DESCRIPTOR = 7,
	GET_CONFIGURATION = 8,
	SET_CONFIGURATION = 9,
	GET_INTERFACE = 10,
	SET_INTERFACE = 11,
	SYNCH_FRAME = 12
} bRequest_Codes;

typedef enum {
	ENDPOINT_HALT = 0,
	DEVICE_REMOTE_WAKEUP = 1,
	TEST_MODE = 2
} feature_selectors;

typedef struct {
	union {
		struct {
			dev_req_recp req_recp:5;
			dev_req_type req_type:2;
			dev_req_dir data_dir:1;
		} __attribute__ ((packed));
		unsigned char bmRequestType;
	} __attribute__ ((packed));
	unsigned char bRequest;
	unsigned short wValue;
	unsigned short wIndex;
	unsigned short wLength;
} __attribute__ ((packed)) dev_req_t;

struct usbdev_hc;
typedef struct usbdev_hc hci_t;

struct usbdev;
typedef struct usbdev usbdev_t;

typedef enum { SETUP, IN, OUT } direction_t;
typedef enum { CONTROL = 0, ISOCHRONOUS = 1, BULK = 2, INTERRUPT = 3
} endpoint_type;

typedef struct {
	usbdev_t *dev;
	int endpoint;
	direction_t direction;
	int toggle;
	int maxpacketsize;
	endpoint_type type;
	int interval; /* expressed as binary logarithm of the number
			 of microframes (i.e. t = 125us * 2^interval) */
} endpoint_t;

enum { FULL_SPEED = 0, LOW_SPEED = 1, HIGH_SPEED = 2, SUPER_SPEED = 3 };

struct usbdev {
	hci_t *controller;
	endpoint_t endpoints[32];
	int num_endp;
	int address;		// usb address
	int hub;		// hub, device is attached to
	int port;		// port where device is attached
	int speed;		// 1: lowspeed, 0: fullspeed, 2: highspeed
	u32 quirks;		// quirks field. got to love usb
	void *data;
	u8 *descriptor;
	u8 *configuration;
	void (*init) (usbdev_t *dev);
	void (*destroy) (usbdev_t *dev);
	void (*poll) (usbdev_t *dev);
};

typedef enum { OHCI = 0, UHCI = 1, EHCI = 2, XHCI = 3} hc_type;

struct usbdev_hc {
	hci_t *next;
	u32 reg_base;
	hc_type type;
	usbdev_t *devices[128];	// dev 0 is root hub, 127 is last addressable

	/* start():     Resume operation. */
	void (*start) (hci_t *controller);
	/* stop():      Stop operation but keep controller initialized. */
	void (*stop) (hci_t *controller);
	/* reset():     Perform a controller reset. The controller needs to
	                be (re)initialized afterwards to work (again). */
	void (*reset) (hci_t *controller);
	/* init():      Initialize a (previously reset) controller
	                to a working state. */
	void (*init) (hci_t *controller);
	/* shutdown():  Stop operation, detach host controller and shutdown
	                this driver instance. After calling shutdown() any
			other usage of this hci_t* is invalid. */
	void (*shutdown) (hci_t *controller);

	int (*bulk) (endpoint_t *ep, int size, u8 *data, int finalize);
	int (*control) (usbdev_t *dev, direction_t pid, int dr_length,
			void *devreq, int data_length, u8 *data);
	void* (*create_intr_queue) (endpoint_t *ep, int reqsize, int reqcount, int reqtiming);
	void (*destroy_intr_queue) (endpoint_t *ep, void *queue);
	u8* (*poll_intr_queue) (void *queue);
	void *instance;

	/* set_address():		Tell the usb device its address and
					return it. xHCI controllers want to
					do this by themself. Also, the usbdev
					structure has to be allocated and
					initialized. */
	int (*set_address) (hci_t *controller, int speed, int hubport, int hubaddr);
	/* finish_device_config():	Another hook for xHCI,
					returns 0 on success. */
	int (*finish_device_config) (usbdev_t *dev);
	/* destroy_device():		Finally, destroy all structures that
					were allocated during set_address()
					and finish_device_config(). */
	void (*destroy_device) (hci_t *controller, int devaddr);
};

typedef struct {
	unsigned char bDescLength;
	unsigned char bDescriptorType;
	unsigned char bNbrPorts;
	union {
		struct {
			unsigned long logicalPowerSwitchingMode:2;
			unsigned long isCompoundDevice:1;
			unsigned long overcurrentProtectionMode:2;
			unsigned long ttThinkTime:2;
			unsigned long arePortIndicatorsSupported:1;
			unsigned long:8;
		} __attribute__ ((packed));
		unsigned short wHubCharacteristics;
	} __attribute__ ((packed));
	unsigned char bPowerOn2PwrGood;
	unsigned char bHubContrCurrent;
	char DeviceRemovable[];
} __attribute__ ((packed)) hub_descriptor_t;

typedef struct {
	unsigned char bLength;
	unsigned char bDescriptorType;
	unsigned short bcdUSB;
	unsigned char bDeviceClass;
	unsigned char bDeviceSubClass;
	unsigned char bDeviceProtocol;
	unsigned char bMaxPacketSize0;
	unsigned short idVendor;
	unsigned short idProduct;
	unsigned short bcdDevice;
	unsigned char iManufacturer;
	unsigned char iProduct;
	unsigned char iSerialNumber;
	unsigned char bNumConfigurations;
} __attribute__ ((packed)) device_descriptor_t;

typedef struct {
	unsigned char bLength;
	unsigned char bDescriptorType;
	unsigned short wTotalLength;
	unsigned char bNumInterfaces;
	unsigned char bConfigurationValue;
	unsigned char iConfiguration;
	unsigned char bmAttributes;
	unsigned char bMaxPower;
} __attribute__ ((packed)) configuration_descriptor_t;

typedef struct {
	unsigned char bLength;
	unsigned char bDescriptorType;
	unsigned char bInterfaceNumber;
	unsigned char bAlternateSetting;
	unsigned char bNumEndpoints;
	unsigned char bInterfaceClass;
	unsigned char bInterfaceSubClass;
	unsigned char bInterfaceProtocol;
	unsigned char iInterface;
} __attribute__ ((packed)) interface_descriptor_t;

typedef struct {
	unsigned char bLength;
	unsigned char bDescriptorType;
	unsigned char bEndpointAddress;
	unsigned char bmAttributes;
	unsigned short wMaxPacketSize;
	unsigned char bInterval;
} __attribute__ ((packed)) endpoint_descriptor_t;

typedef struct {
	unsigned char bLength;
	unsigned char bDescriptorType;
	unsigned short bcdHID;
	unsigned char bCountryCode;
	unsigned char bNumDescriptors;
	unsigned char bReportDescriptorType;
	unsigned short wReportDescriptorLength;
} __attribute__ ((packed)) hid_descriptor_t;

hci_t *new_controller (void);
void detach_controller (hci_t *controller);
void usb_poll (void);
void init_device_entry (hci_t *controller, int num);

void set_feature (usbdev_t *dev, int endp, int feature, int rtype);
void get_status (usbdev_t *dev, int endp, int rtype, int len, void *data);
void set_configuration (usbdev_t *dev);
int clear_feature (usbdev_t *dev, int endp, int feature, int rtype);
int clear_stall (endpoint_t *ep);

void usb_nop_init (usbdev_t *dev);
void usb_hub_init (usbdev_t *dev);
void usb_hid_init (usbdev_t *dev);
void usb_msc_init (usbdev_t *dev);
void usb_generic_init (usbdev_t *dev);

u8 *get_descriptor (usbdev_t *dev, unsigned char bmRequestType,
		    int descType, int descIdx, int langID);

static inline unsigned char
gen_bmRequestType (dev_req_dir dir, dev_req_type type, dev_req_recp recp)
{
	return (dir << 7) | (type << 5) | recp;
}

/* default "set address" handler */
int generic_set_address (hci_t *controller, int speed, int hubport, int hubaddr);

void usb_detach_device(hci_t *controller, int devno);
int usb_attach_device(hci_t *controller, int hubaddress, int port, int speed);

u32 usb_quirk_check(u16 vendor, u16 device);
int usb_interface_check(u16 vendor, u16 device);

#define USB_QUIRK_MSC_FORCE_PROTO_SCSI		(1 <<  0)
#define USB_QUIRK_MSC_FORCE_PROTO_ATAPI		(1 <<  1)
#define USB_QUIRK_MSC_FORCE_PROTO_UFI		(1 <<  2)
#define USB_QUIRK_MSC_FORCE_PROTO_RBC		(1 <<  3)
#define USB_QUIRK_MSC_FORCE_TRANS_BBB		(1 <<  4)
#define USB_QUIRK_MSC_FORCE_TRANS_CBI		(1 <<  5)
#define USB_QUIRK_MSC_FORCE_TRANS_CBI_I		(1 <<  6)
#define USB_QUIRK_MSC_NO_TEST_UNIT_READY	(1 <<  7)
#define USB_QUIRK_MSC_SHORT_INQUIRY		(1 <<  8)
#define USB_QUIRK_TEST				(1 << 31)
#define USB_QUIRK_NONE				 0

static inline void usb_debug(const char *fmt, ...)
{
#ifdef USB_DEBUG
	va_list ap;
	va_start(ap, fmt);
	vprintf(fmt, ap);
	va_end(ap);
#endif
}

/**
 * To be implemented by libpayload-client. It's called by the USB stack
 * when a new USB device is found which isn't claimed by a built in driver,
 * so the client has the chance to know about it.
 *
 * @param dev descriptor for the USB device
 */
void __attribute__((weak)) usb_generic_create (usbdev_t *dev);

/**
 * To be implemented by libpayload-client. It's called by the USB stack
 * when it finds out that a USB device is removed which wasn't claimed by a
 * built in driver.
 *
 * @param dev descriptor for the USB device
 */
void __attribute__((weak)) usb_generic_remove (usbdev_t *dev);

#endif