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
|
/* OpenPCD USB handler - handle incoming USB requests on OUT pipe
* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sys/types.h>
#include <errno.h>
#include <string.h>
#include <openpcd.h>
#include <os/pcd_enumerate.h>
#include <os/usb_handler.h>
#include <os/req_ctx.h>
#include <os/led.h>
#include <os/dbgu.h>
#include "../openpcd.h"
static usb_cmd_fn *cmd_hdlrs[16];
int usb_hdlr_register(usb_cmd_fn *hdlr, u_int8_t class)
{
cmd_hdlrs[class] = hdlr;
return 0;
}
void usb_hdlr_unregister(u_int8_t class)
{
cmd_hdlrs[class] = NULL;
}
static int usb_in(struct req_ctx *rctx)
{
struct openpcd_hdr *poh = (struct openpcd_hdr *) rctx->data;
usb_cmd_fn *hdlr;
int ret;
DEBUGP("usb_in(cls=%d) ", OPENPCD_CMD_CLS(poh->cmd));
if (rctx->tot_len < sizeof(*poh))
return -EINVAL;
hdlr = cmd_hdlrs[OPENPCD_CMD_CLS(poh->cmd)];
if (!hdlr) {
DEBUGPCR("no handler for this class ");
ret = USB_ERR(USB_ERR_CMD_UNKNOWN);
} else
ret = (hdlr)(rctx);
if (ret & USB_RET_ERR) {
poh->val = ret & 0xff;
poh->flags = OPENPCD_FLAG_ERROR;
}
if (ret & USB_RET_RESPOND) {
req_ctx_set_state(rctx, RCTX_STATE_UDP_EP2_PENDING);
udp_refill_ep(2);
}
DEBUGPCR("");
return (ret & USB_RET_ERR) ? 1 : 0;
}
/* Process all pending request contexts that want to Tx on either
* IN or INTERRUPT endpoint */
void usb_out_process(void)
{
/* interrupts are likely to be more urgent than bulk */
udp_refill_ep(3);
udp_refill_ep(2);
}
/* process incoming USB packets (OUT pipe) that have already been
* put into request contexts by the UDP IRQ handler */
void usb_in_process(void)
{
struct req_ctx *rctx;
while (rctx = req_ctx_find_get(0, RCTX_STATE_UDP_RCV_DONE,
RCTX_STATE_MAIN_PROCESSING)) {
DEBUGPCRF("found used ctx %u: len=%u",
req_ctx_num(rctx), rctx->tot_len);
usb_in(rctx);
}
udp_unthrottle();
}
|
