| 1 | /*
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| 2 | * Copyright (c) 2011 Jan Vesely
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 | /** @addtogroup drvusbohci
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| 29 | * @{
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| 30 | */
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| 31 | /** @file
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| 32 | * @brief OHCI driver
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| 33 | */
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| 34 | #include "endpoint_descriptor.h"
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| 35 | #include "macros.h"
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| 36 |
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| 37 | /** USB direction to OHCI values translation table. */
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| 38 | static const uint32_t dir[] = {
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| 39 | [USB_DIRECTION_IN] = ED_STATUS_D_IN,
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| 40 | [USB_DIRECTION_OUT] = ED_STATUS_D_OUT,
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| 41 | [USB_DIRECTION_BOTH] = ED_STATUS_D_TD,
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| 42 | };
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| 43 |
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| 44 | /**
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| 45 | * Initialize ED.
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| 46 | *
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| 47 | * @param instance ED structure to initialize.
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| 48 | * @param ep Driver endpoint to use.
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| 49 | * @param td TD to put in the list.
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| 50 | *
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| 51 | * If @param ep is NULL, dummy ED is initalized with only skip flag set.
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| 52 | */
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| 53 | void ed_init(ed_t *instance, const endpoint_t *ep, const td_t *td)
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| 54 | {
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| 55 | assert(instance);
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| 56 | memset(instance, 0, sizeof(ed_t));
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| 57 |
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| 58 | if (ep == NULL) {
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| 59 | /* Mark as dead, used for dummy EDs at the beginning of
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| 60 | * endpoint lists. */
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| 61 | OHCI_MEM32_WR(instance->status, ED_STATUS_K_FLAG);
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| 62 | return;
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| 63 | }
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| 64 | /* Non-dummy ED must have corresponding EP and TD assigned */
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| 65 | assert(td);
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| 66 | assert(ep);
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| 67 | assert(ep->direction < ARRAY_SIZE(dir));
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| 68 |
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| 69 | /* Status: address, endpoint nr, direction mask and max packet size. */
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| 70 | OHCI_MEM32_WR(instance->status,
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| 71 | ((ep->address & ED_STATUS_FA_MASK) << ED_STATUS_FA_SHIFT)
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| 72 | | ((ep->endpoint & ED_STATUS_EN_MASK) << ED_STATUS_EN_SHIFT)
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| 73 | | ((dir[ep->direction] & ED_STATUS_D_MASK) << ED_STATUS_D_SHIFT)
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| 74 | | ((ep->max_packet_size & ED_STATUS_MPS_MASK)
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| 75 | << ED_STATUS_MPS_SHIFT));
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| 76 |
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| 77 | /* Low speed flag */
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| 78 | if (ep->speed == USB_SPEED_LOW)
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| 79 | OHCI_MEM32_SET(instance->status, ED_STATUS_S_FLAG);
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| 80 |
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| 81 | /* Isochronous format flag */
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| 82 | // TODO: We need iTD instead of TD for iso transfers
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| 83 | if (ep->transfer_type == USB_TRANSFER_ISOCHRONOUS)
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| 84 | OHCI_MEM32_SET(instance->status, ED_STATUS_F_FLAG);
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| 85 |
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| 86 | /* Set TD to the list */
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| 87 | const uintptr_t pa = addr_to_phys(td);
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| 88 | OHCI_MEM32_WR(instance->td_head, pa & ED_TDHEAD_PTR_MASK);
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| 89 | OHCI_MEM32_WR(instance->td_tail, pa & ED_TDTAIL_PTR_MASK);
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| 90 |
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| 91 | /* Set toggle bit */
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| 92 | if (ep->toggle)
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| 93 | OHCI_MEM32_SET(instance->td_head, ED_TDHEAD_TOGGLE_CARRY);
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| 94 |
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| 95 | }
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| 96 | /**
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| 97 | * @}
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| 98 | */
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