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/* OpenPCD USB handler - handle incoming USB requests on OUT pipe
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* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <string.h>
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#include <openpcd.h>
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#include <os/pcd_enumerate.h>
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#include <os/usb_handler.h>
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#include <os/req_ctx.h>
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#include <os/led.h>
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#include <os/dbgu.h>
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#include "../openpcd.h"
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static usb_cmd_fn *cmd_hdlrs[16];
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int usb_hdlr_register(usb_cmd_fn *hdlr, uint8_t class)
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{
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cmd_hdlrs[class] = hdlr;
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return 0;
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}
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void usb_hdlr_unregister(uint8_t class)
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{
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cmd_hdlrs[class] = NULL;
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}
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static int usb_in(struct req_ctx *rctx)
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{
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struct openpcd_hdr *poh = (struct openpcd_hdr *) rctx->data;
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usb_cmd_fn *hdlr;
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int ret;
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/* DEBUGP("usb_in(cls=%d) ", OPENPCD_CMD_CLS(poh->cmd));*/
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if (rctx->tot_len < sizeof(*poh))
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return -EINVAL;
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hdlr = cmd_hdlrs[OPENPCD_CMD_CLS(poh->cmd)];
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if (!hdlr) {
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DEBUGPCR("no handler for this class ");
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ret = USB_ERR(USB_ERR_CMD_UNKNOWN);
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} else
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ret = (hdlr)(rctx);
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if (ret & USB_RET_ERR) {
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poh->val = ret & 0xff;
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poh->flags = OPENPCD_FLAG_ERROR;
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}
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if (ret & USB_RET_RESPOND) {
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req_ctx_set_state(rctx, RCTX_STATE_UDP_EP2_PENDING);
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udp_refill_ep(2);
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}
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/* DEBUGPCR("");*/
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return (ret & USB_RET_ERR) ? 1 : 0;
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}
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/* Process all pending request contexts that want to Tx on either
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* IN or INTERRUPT endpoint */
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void usb_out_process(void)
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{
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/* interrupts are likely to be more urgent than bulk */
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udp_refill_ep(3);
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udp_refill_ep(2);
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}
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/* process incoming USB packets (OUT pipe) that have already been
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* put into request contexts by the UDP IRQ handler */
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void usb_in_process(void)
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{
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struct req_ctx *rctx;
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while (rctx = req_ctx_find_get(0, RCTX_STATE_UDP_RCV_DONE,
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RCTX_STATE_MAIN_PROCESSING)) {
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/* DEBUGPCRF("found used ctx %u: len=%u",
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req_ctx_num(rctx), rctx->tot_len);*/
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usb_in(rctx);
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}
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udp_unthrottle();
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}
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