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9#ifndef __LINUX_XHCI_DBGCAP_H
10#define __LINUX_XHCI_DBGCAP_H
11
12#include <linux/tty.h>
13#include <linux/kfifo.h>
14
15struct dbc_regs {
16 __le32 capability;
17 __le32 doorbell;
18 __le32 ersts;
19 __le32 __reserved_0;
20 __le64 erstba;
21 __le64 erdp;
22 __le32 control;
23 __le32 status;
24 __le32 portsc;
25 __le32 __reserved_1;
26 __le64 dccp;
27 __le32 devinfo1;
28 __le32 devinfo2;
29};
30
31struct dbc_info_context {
32 __le64 string0;
33 __le64 manufacturer;
34 __le64 product;
35 __le64 serial;
36 __le32 length;
37 __le32 __reserved_0[7];
38};
39
40#define DBC_CTRL_DBC_RUN BIT(0)
41#define DBC_CTRL_PORT_ENABLE BIT(1)
42#define DBC_CTRL_HALT_OUT_TR BIT(2)
43#define DBC_CTRL_HALT_IN_TR BIT(3)
44#define DBC_CTRL_DBC_RUN_CHANGE BIT(4)
45#define DBC_CTRL_DBC_ENABLE BIT(31)
46#define DBC_CTRL_MAXBURST(p) (((p) >> 16) & 0xff)
47#define DBC_DOOR_BELL_TARGET(p) (((p) & 0xff) << 8)
48
49#define DBC_MAX_PACKET 1024
50#define DBC_MAX_STRING_LENGTH 64
51#define DBC_STRING_MANUFACTURER "Linux Foundation"
52#define DBC_STRING_PRODUCT "Linux USB Debug Target"
53#define DBC_STRING_SERIAL "0001"
54#define DBC_CONTEXT_SIZE 64
55
56
57
58
59#define DBC_PORTSC_CONN_STATUS BIT(0)
60#define DBC_PORTSC_PORT_ENABLED BIT(1)
61#define DBC_PORTSC_CONN_CHANGE BIT(17)
62#define DBC_PORTSC_RESET_CHANGE BIT(21)
63#define DBC_PORTSC_LINK_CHANGE BIT(22)
64#define DBC_PORTSC_CONFIG_CHANGE BIT(23)
65
66struct dbc_str_descs {
67 char string0[DBC_MAX_STRING_LENGTH];
68 char manufacturer[DBC_MAX_STRING_LENGTH];
69 char product[DBC_MAX_STRING_LENGTH];
70 char serial[DBC_MAX_STRING_LENGTH];
71};
72
73#define DBC_PROTOCOL 1
74#define DBC_VENDOR_ID 0x1d6b
75#define DBC_PRODUCT_ID 0x0010
76#define DBC_DEVICE_REV 0x0010
77
78enum dbc_state {
79 DS_DISABLED = 0,
80 DS_INITIALIZED,
81 DS_ENABLED,
82 DS_CONNECTED,
83 DS_CONFIGURED,
84 DS_STALLED,
85};
86
87struct dbc_ep {
88 struct xhci_dbc *dbc;
89 struct list_head list_pending;
90 struct xhci_ring *ring;
91 unsigned int direction:1;
92};
93
94#define DBC_QUEUE_SIZE 16
95#define DBC_WRITE_BUF_SIZE 8192
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98
99
100struct dbc_port {
101 struct tty_port port;
102 spinlock_t port_lock;
103
104 struct list_head read_pool;
105 struct list_head read_queue;
106 unsigned int n_read;
107 struct tasklet_struct push;
108
109 struct list_head write_pool;
110 struct kfifo write_fifo;
111
112 bool registered;
113};
114
115struct dbc_driver {
116 int (*configure)(struct xhci_dbc *dbc);
117 void (*disconnect)(struct xhci_dbc *dbc);
118};
119
120struct xhci_dbc {
121 spinlock_t lock;
122 struct device *dev;
123 struct xhci_hcd *xhci;
124 struct dbc_regs __iomem *regs;
125 struct xhci_ring *ring_evt;
126 struct xhci_ring *ring_in;
127 struct xhci_ring *ring_out;
128 struct xhci_erst erst;
129 struct xhci_container_ctx *ctx;
130
131 struct dbc_str_descs *string;
132 dma_addr_t string_dma;
133 size_t string_size;
134
135 enum dbc_state state;
136 struct delayed_work event_work;
137 unsigned resume_required:1;
138 struct dbc_ep eps[2];
139
140 const struct dbc_driver *driver;
141 void *priv;
142};
143
144struct dbc_request {
145 void *buf;
146 unsigned int length;
147 dma_addr_t dma;
148 void (*complete)(struct xhci_dbc *dbc,
149 struct dbc_request *req);
150 struct list_head list_pool;
151 int status;
152 unsigned int actual;
153
154 struct xhci_dbc *dbc;
155 struct list_head list_pending;
156 dma_addr_t trb_dma;
157 union xhci_trb *trb;
158 unsigned direction:1;
159};
160
161#define dbc_bulkout_ctx(d) \
162 ((struct xhci_ep_ctx *)((d)->ctx->bytes + DBC_CONTEXT_SIZE))
163#define dbc_bulkin_ctx(d) \
164 ((struct xhci_ep_ctx *)((d)->ctx->bytes + DBC_CONTEXT_SIZE * 2))
165#define dbc_bulkout_enq(d) \
166 xhci_trb_virt_to_dma((d)->ring_out->enq_seg, (d)->ring_out->enqueue)
167#define dbc_bulkin_enq(d) \
168 xhci_trb_virt_to_dma((d)->ring_in->enq_seg, (d)->ring_in->enqueue)
169#define dbc_epctx_info2(t, p, b) \
170 cpu_to_le32(EP_TYPE(t) | MAX_PACKET(p) | MAX_BURST(b))
171#define dbc_ep_dma_direction(d) \
172 ((d)->direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE)
173
174#define BULK_OUT 0
175#define BULK_IN 1
176#define EPID_OUT 2
177#define EPID_IN 3
178
179enum evtreturn {
180 EVT_ERR = -1,
181 EVT_DONE,
182 EVT_GSER,
183 EVT_DISC,
184};
185
186static inline struct dbc_ep *get_in_ep(struct xhci_dbc *dbc)
187{
188 return &dbc->eps[BULK_IN];
189}
190
191static inline struct dbc_ep *get_out_ep(struct xhci_dbc *dbc)
192{
193 return &dbc->eps[BULK_OUT];
194}
195
196#ifdef CONFIG_USB_XHCI_DBGCAP
197int xhci_dbc_init(struct xhci_hcd *xhci);
198void xhci_dbc_exit(struct xhci_hcd *xhci);
199int xhci_dbc_tty_probe(struct xhci_hcd *xhci);
200void xhci_dbc_tty_remove(struct xhci_dbc *dbc);
201struct dbc_request *dbc_alloc_request(struct xhci_dbc *dbc,
202 unsigned int direction,
203 gfp_t flags);
204void dbc_free_request(struct dbc_request *req);
205int dbc_ep_queue(struct dbc_request *req);
206#ifdef CONFIG_PM
207int xhci_dbc_suspend(struct xhci_hcd *xhci);
208int xhci_dbc_resume(struct xhci_hcd *xhci);
209#endif
210#else
211static inline int xhci_dbc_init(struct xhci_hcd *xhci)
212{
213 return 0;
214}
215
216static inline void xhci_dbc_exit(struct xhci_hcd *xhci)
217{
218}
219
220static inline int xhci_dbc_suspend(struct xhci_hcd *xhci)
221{
222 return 0;
223}
224
225static inline int xhci_dbc_resume(struct xhci_hcd *xhci)
226{
227 return 0;
228}
229#endif
230#endif
231
