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
|
/* SPDX-License-Identifier: GPL-2.0 */
/**
* xhci-dbgcap.h - xHCI debug capability support
*
* Copyright (C) 2017 Intel Corporation
*
* Author: Lu Baolu <baolu.lu@linux.intel.com>
*/
#ifndef __LINUX_XHCI_DBGCAP_H
#define __LINUX_XHCI_DBGCAP_H
#include <linux/tty.h>
#include <linux/kfifo.h>
struct dbc_regs {
__le32 capability;
__le32 doorbell;
__le32 ersts; /* Event Ring Segment Table Size*/
__le32 __reserved_0; /* 0c~0f reserved bits */
__le64 erstba; /* Event Ring Segment Table Base Address */
__le64 erdp; /* Event Ring Dequeue Pointer */
__le32 control;
__le32 status;
__le32 portsc; /* Port status and control */
__le32 __reserved_1; /* 2b~28 reserved bits */
__le64 dccp; /* Debug Capability Context Pointer */
__le32 devinfo1; /* Device Descriptor Info Register 1 */
__le32 devinfo2; /* Device Descriptor Info Register 2 */
};
struct dbc_info_context {
__le64 string0;
__le64 manufacturer;
__le64 product;
__le64 serial;
__le32 length;
__le32 __reserved_0[7];
};
#define DBC_CTRL_DBC_RUN BIT(0)
#define DBC_CTRL_PORT_ENABLE BIT(1)
#define DBC_CTRL_HALT_OUT_TR BIT(2)
#define DBC_CTRL_HALT_IN_TR BIT(3)
#define DBC_CTRL_DBC_RUN_CHANGE BIT(4)
#define DBC_CTRL_DBC_ENABLE BIT(31)
#define DBC_CTRL_MAXBURST(p) (((p) >> 16) & 0xff)
#define DBC_DOOR_BELL_TARGET(p) (((p) & 0xff) << 8)
#define DBC_MAX_PACKET 1024
#define DBC_MAX_STRING_LENGTH 64
#define DBC_STRING_MANUFACTURER "Linux Foundation"
#define DBC_STRING_PRODUCT "Linux USB Debug Target"
#define DBC_STRING_SERIAL "0001"
#define DBC_CONTEXT_SIZE 64
/*
* Port status:
*/
#define DBC_PORTSC_CONN_STATUS BIT(0)
#define DBC_PORTSC_PORT_ENABLED BIT(1)
#define DBC_PORTSC_CONN_CHANGE BIT(17)
#define DBC_PORTSC_RESET_CHANGE BIT(21)
#define DBC_PORTSC_LINK_CHANGE BIT(22)
#define DBC_PORTSC_CONFIG_CHANGE BIT(23)
struct dbc_str_descs {
char string0[DBC_MAX_STRING_LENGTH];
char manufacturer[DBC_MAX_STRING_LENGTH];
char product[DBC_MAX_STRING_LENGTH];
char serial[DBC_MAX_STRING_LENGTH];
};
#define DBC_PROTOCOL 1 /* GNU Remote Debug Command */
#define DBC_VENDOR_ID 0x1d6b /* Linux Foundation 0x1d6b */
#define DBC_PRODUCT_ID 0x0010 /* device 0010 */
#define DBC_DEVICE_REV 0x0010 /* 0.10 */
enum dbc_state {
DS_DISABLED = 0,
DS_INITIALIZED,
DS_ENABLED,
DS_CONNECTED,
DS_CONFIGURED,
DS_STALLED,
};
struct dbc_request {
void *buf;
unsigned int length;
dma_addr_t dma;
void (*complete)(struct xhci_hcd *xhci,
struct dbc_request *req);
struct list_head list_pool;
int status;
unsigned int actual;
struct dbc_ep *dep;
struct list_head list_pending;
dma_addr_t trb_dma;
union xhci_trb *trb;
unsigned direction:1;
};
struct dbc_ep {
struct xhci_dbc *dbc;
struct list_head list_pending;
struct xhci_ring *ring;
unsigned direction:1;
};
#define DBC_QUEUE_SIZE 16
#define DBC_WRITE_BUF_SIZE 8192
/*
* Private structure for DbC hardware state:
*/
struct dbc_port {
struct tty_port port;
spinlock_t port_lock; /* port access */
struct list_head read_pool;
struct list_head read_queue;
unsigned int n_read;
struct tasklet_struct push;
struct list_head write_pool;
struct kfifo write_fifo;
bool registered;
struct dbc_ep *in;
struct dbc_ep *out;
};
struct xhci_dbc {
spinlock_t lock; /* device access */
struct xhci_hcd *xhci;
struct dbc_regs __iomem *regs;
struct xhci_ring *ring_evt;
struct xhci_ring *ring_in;
struct xhci_ring *ring_out;
struct xhci_erst erst;
struct xhci_container_ctx *ctx;
struct dbc_str_descs *string;
dma_addr_t string_dma;
size_t string_size;
enum dbc_state state;
struct delayed_work event_work;
unsigned resume_required:1;
struct dbc_ep eps[2];
struct dbc_port port;
};
#define dbc_bulkout_ctx(d) \
((struct xhci_ep_ctx *)((d)->ctx->bytes + DBC_CONTEXT_SIZE))
#define dbc_bulkin_ctx(d) \
((struct xhci_ep_ctx *)((d)->ctx->bytes + DBC_CONTEXT_SIZE * 2))
#define dbc_bulkout_enq(d) \
xhci_trb_virt_to_dma((d)->ring_out->enq_seg, (d)->ring_out->enqueue)
#define dbc_bulkin_enq(d) \
xhci_trb_virt_to_dma((d)->ring_in->enq_seg, (d)->ring_in->enqueue)
#define dbc_epctx_info2(t, p, b) \
cpu_to_le32(EP_TYPE(t) | MAX_PACKET(p) | MAX_BURST(b))
#define dbc_ep_dma_direction(d) \
((d)->direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE)
#define BULK_OUT 0
#define BULK_IN 1
#define EPID_OUT 2
#define EPID_IN 3
enum evtreturn {
EVT_ERR = -1,
EVT_DONE,
EVT_GSER,
EVT_DISC,
};
static inline struct dbc_ep *get_in_ep(struct xhci_hcd *xhci)
{
struct xhci_dbc *dbc = xhci->dbc;
return &dbc->eps[BULK_IN];
}
static inline struct dbc_ep *get_out_ep(struct xhci_hcd *xhci)
{
struct xhci_dbc *dbc = xhci->dbc;
return &dbc->eps[BULK_OUT];
}
#ifdef CONFIG_USB_XHCI_DBGCAP
int xhci_dbc_init(struct xhci_hcd *xhci);
void xhci_dbc_exit(struct xhci_hcd *xhci);
int xhci_dbc_tty_register_driver(struct xhci_hcd *xhci);
void xhci_dbc_tty_unregister_driver(void);
int xhci_dbc_tty_register_device(struct xhci_hcd *xhci);
void xhci_dbc_tty_unregister_device(struct xhci_hcd *xhci);
struct dbc_request *dbc_alloc_request(struct dbc_ep *dep, gfp_t gfp_flags);
void dbc_free_request(struct dbc_ep *dep, struct dbc_request *req);
int dbc_ep_queue(struct dbc_ep *dep, struct dbc_request *req, gfp_t gfp_flags);
#ifdef CONFIG_PM
int xhci_dbc_suspend(struct xhci_hcd *xhci);
int xhci_dbc_resume(struct xhci_hcd *xhci);
#endif /* CONFIG_PM */
#else
static inline int xhci_dbc_init(struct xhci_hcd *xhci)
{
return 0;
}
static inline void xhci_dbc_exit(struct xhci_hcd *xhci)
{
}
static inline int xhci_dbc_suspend(struct xhci_hcd *xhci)
{
return 0;
}
static inline int xhci_dbc_resume(struct xhci_hcd *xhci)
{
return 0;
}
#endif /* CONFIG_USB_XHCI_DBGCAP */
#endif /* __LINUX_XHCI_DBGCAP_H */
|
