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/* 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->rx.data[0];
struct openpcd_hdr *pih = (struct openpcd_hdr *) &rctx->tx.data[0];
usb_cmd_fn *hdlr;
DEBUGP("usb_in(cls=%d) ", OPENPCD_CMD_CLS(poh->cmd));
if (rctx->rx.tot_len < sizeof(*poh))
return -EINVAL;
memcpy(pih, poh, sizeof(*poh));
rctx->tx.tot_len = sizeof(*poh);
hdlr = cmd_hdlrs[OPENPCD_CMD_CLS(poh->cmd)];
if (hdlr)
return (hdlr)(rctx);
else
DEBUGPCR("no handler for this class\n");
}
/* Process all pending request contexts that want to Tx on either
* IN or INTERRUPT endpoint */
void usb_out_process(void)
{
struct req_ctx *rctx;
while (rctx = req_ctx_find_get(RCTX_STATE_UDP_EP3_PENDING,
RCTX_STATE_UDP_EP3_BUSY)) {
DEBUGPCRF("EP3_BUSY for ctx %u", req_ctx_num(rctx));
if (udp_refill_ep(3, rctx) < 0)
req_ctx_set_state(rctx, RCTX_STATE_UDP_EP3_PENDING);
}
while (rctx = req_ctx_find_get(RCTX_STATE_UDP_EP2_PENDING,
RCTX_STATE_UDP_EP2_BUSY)) {
DEBUGPCRF("EP2_BUSY for ctx %u", req_ctx_num(rctx));
if (udp_refill_ep(2, rctx) < 0)
req_ctx_set_state(rctx, RCTX_STATE_UDP_EP2_PENDING);
}
}
/* 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(RCTX_STATE_UDP_RCV_DONE,
RCTX_STATE_MAIN_PROCESSING)) {
DEBUGPCRF("found used ctx %u: len=%u",
req_ctx_num(rctx), rctx->rx.tot_len);
usb_in(rctx);
}
udp_unthrottle();
}
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