| 1 | /*
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| 2 | * Copyright (c) 2013 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 drvusbehci
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| 29 | * @{
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| 30 | */
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| 31 | /** @file
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| 32 | * @brief EHCI driver
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| 33 | */
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| 34 |
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| 35 | #include <assert.h>
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| 36 | #include <usb/usb.h>
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| 37 | #include <mem.h>
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| 38 | #include <macros.h>
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| 39 |
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| 40 | #include "mem_access.h"
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| 41 |
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| 42 | #include "queue_head.h"
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| 43 |
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| 44 | const uint32_t speed[] = {
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| 45 | [USB_SPEED_LOW] = QH_EP_CHAR_EPS_LS,
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| 46 | [USB_SPEED_FULL] = QH_EP_CHAR_EPS_FS,
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| 47 | [USB_SPEED_HIGH] = QH_EP_CHAR_EPS_HS,
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| 48 | };
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| 49 |
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| 50 | void qh_init(qh_t *instance, const endpoint_t *ep)
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| 51 | {
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| 52 | assert(instance);
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| 53 | memset(instance, 0, sizeof(*instance));
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| 54 |
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| 55 | EHCI_MEM32_WR(instance->horizontal, LINK_POINTER_TERM);
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| 56 | EHCI_MEM32_WR(instance->current, LINK_POINTER_TERM);
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| 57 | EHCI_MEM32_WR(instance->next, LINK_POINTER_TERM);
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| 58 | EHCI_MEM32_WR(instance->alternate, LINK_POINTER_TERM);
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| 59 | if (ep == NULL) {
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| 60 | /* Mark as halted and list head, used by endpoint lists
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| 61 | * as dummy */
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| 62 | EHCI_MEM32_WR(instance->ep_char, QH_EP_CHAR_H_FLAG);
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| 63 | EHCI_MEM32_WR(instance->status, QH_STATUS_HALTED_FLAG);
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| 64 | return;
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| 65 | }
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| 66 | assert(ep->speed < ARRAY_SIZE(speed));
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| 67 | EHCI_MEM32_WR(instance->ep_char,
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| 68 | QH_EP_CHAR_ADDR_SET(ep->address) |
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| 69 | QH_EP_CHAR_EP_SET(ep->endpoint) |
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| 70 | speed[ep->speed] |
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| 71 | QH_EP_CHAR_MAX_LENGTH_SET(ep->max_packet_size)
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| 72 | );
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| 73 | if (ep->transfer_type == USB_TRANSFER_CONTROL) {
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| 74 | if (ep->speed != USB_SPEED_HIGH)
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| 75 | EHCI_MEM32_SET(instance->ep_char, QH_EP_CHAR_C_FLAG);
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| 76 | /* Let BULK and INT use queue head managed toggle,
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| 77 | * CONTROL needs special toggle handling anyway */
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| 78 | EHCI_MEM32_SET(instance->ep_char, QH_EP_CHAR_DTC_FLAG);
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| 79 | }
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| 80 |
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| 81 | // TODO Figure out how to correctly use CMASK and SMASK for LS/FS
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| 82 | // INT transfers. Current values are just guesses
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| 83 | /* Setting TT stuff on HS endpoints is OK, the fields are ignored,
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| 84 | * and so is setting multi on async (should be 1 anyway)*/
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| 85 | EHCI_MEM32_WR(instance->ep_cap,
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| 86 | QH_EP_CAP_MULTI_SET(ep->packets) |
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| 87 | QH_EP_CAP_TT_PORT_SET(ep->tt.port) |
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| 88 | QH_EP_CAP_TT_ADDR_SET(ep->tt.address) |
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| 89 | QH_EP_CAP_C_MASK_SET(3 << 2) |
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| 90 | QH_EP_CAP_S_MASK_SET(3)
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| 91 | );
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| 92 | /* The rest of the fields are transfer working area, it should be ok to
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| 93 | * leave it NULL */
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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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