/*
 * Original Copyright (c) 2001 by David Brownell
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/* this file is part of ehci.c */


static inline void ehci_qtd_init(struct ehci_qtd *qtd
				  )
{
        dma_addr_t dma = ehci_virt_to_dma(qtd);
	memset (qtd, 0, sizeof *qtd);
	qtd->qtd_dma = dma;
	qtd->hw_token = (QTD_STS_HALT);
	qtd->hw_next = EHCI_LIST_END();
	qtd->hw_alt_next = EHCI_LIST_END();
}

int qtd_alt_mem=0; // double buffer qtd

static inline struct ehci_qtd * ehci_qtd_alloc(void)
{
        struct ehci_qtd *qtd ;
        //debug_printf("ehci_qtd used=%x\n",ehci->qtd_used);
        if(ehci->qtd_used>=(EHCI_MAX_QTD)) return NULL;
        //qtd = ehci->qtds[ehci->qtd_used++];
		qtd = (void *) (((char *) ehci->qtds[0])+(ehci->qtd_used+EHCI_MAX_QTD*qtd_alt_mem)*((sizeof(struct ehci_qtd)+31) & ~31));
		ehci->qtd_used++;
        ehci_qtd_init(qtd);
        return qtd;
}





int ehci_mem_init (void)
{
	int i;
#if 1
		ehci->periodic = ehci_maligned(DEFAULT_I_TDPS * sizeof(__le32),32,4096);
        ehci->periodic_dma = ehci_virt_to_dma(ehci->periodic);

	for (i = 0; i < DEFAULT_I_TDPS; i++)
		ehci->periodic [i] = EHCI_LIST_END();
	ehci_writel(ehci->periodic_dma, &ehci->regs->frame_list);
#else
        debug_printf("ehci periodic:%x\n",ehci_readl(ehci,  &ehci->regs->frame_list));
        debug_printf("ehci *periodic:%x\n",*(u32*)ehci_readl(ehci,  &ehci->regs->frame_list));
#endif
        for(i=0;i<EHCI_MAX_QTD;i++)
                ehci->qtds[i] = ehci_maligned(sizeof(struct ehci_qtd),(i==0) ? 4096 : 32,4096);
        ehci->qtd_used = 0;

		ehci->async = ehci_maligned(sizeof(struct ehci_qh),/*32*/4096,4096);
		ehci->async->ehci = ehci;
		ehci->async->qh_dma = ehci_virt_to_dma(ehci->async);
        ehci->async->qtd_head = NULL;

        ehci->asyncqh = ehci_maligned(sizeof(struct ehci_qh),32,4096);
		ehci->asyncqh->ehci = ehci;
		ehci->asyncqh->qh_dma = ehci_virt_to_dma(ehci->asyncqh);
        ehci->asyncqh->qtd_head = NULL;

       

        return 0;
}