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 | #ifndef DRV_EHCI_HW_STRUCT_LINK_POINTER_H
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35 | #define DRV_EHCI_HW_STRUCT_LINK_POINTER_H
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36 |
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37 | #include <stdint.h>
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38 |
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39 | /** EHCI link pointer, used by many data structures */
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40 | typedef volatile uint32_t link_pointer_t;
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41 |
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42 | #define LINK_POINTER_ADDRESS_MASK 0xfffffff0 /* upper 28 bits */
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43 |
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44 | #define LINK_POINTER_TERMINATE_FLAG (1 << 0)
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45 |
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46 | enum {
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47 | LINK_POINTER_TYPE_iTD = 0x0 << 1,
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48 | LINK_POINTER_TYPE_QH = 0x1 << 1,
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49 | LINK_POINTER_TYPE_siTD = 0x2 << 1,
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50 | LINK_POINTER_TYPE_FSTN = 0x3 << 1,
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51 | LINK_POINTER_TYPE_MASK = 0x3 << 1,
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52 | };
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53 |
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54 | #define LINK_POINTER_QH(address) \
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55 | ((address & LINK_POINTER_ADDRESS_MASK) | LINK_POINTER_TYPE_QH)
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56 |
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57 | #define LINK_POINTER_TD(address) \
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58 | (address & LINK_POINTER_ADDRESS_MASK)
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59 |
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60 | #define LINK_POINTER_TERM \
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61 | ((link_pointer_t)LINK_POINTER_TERMINATE_FLAG)
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62 |
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63 | #endif
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64 | /**
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65 | * @}
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66 | */
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