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Dependencies:   mbed

NetServices/drv/usb/usb_mem.c@1:f5ac63519541, 2014-03-05 (annotated)

Committer:
Michael J. Spencer
Date:
Wed Mar 05 06:14:02 2014 -0800
Revision:
1:f5ac63519541
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michael J. Spencer 1:f5ac63519541 1
Michael J. Spencer 1:f5ac63519541 2 /*
Michael J. Spencer 1:f5ac63519541 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
Michael J. Spencer 1:f5ac63519541 4
Michael J. Spencer 1:f5ac63519541 5 Permission is hereby granted, free of charge, to any person obtaining a copy
Michael J. Spencer 1:f5ac63519541 6 of this software and associated documentation files (the "Software"), to deal
Michael J. Spencer 1:f5ac63519541 7 in the Software without restriction, including without limitation the rights
Michael J. Spencer 1:f5ac63519541 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Michael J. Spencer 1:f5ac63519541 9 copies of the Software, and to permit persons to whom the Software is
Michael J. Spencer 1:f5ac63519541 10 furnished to do so, subject to the following conditions:
Michael J. Spencer 1:f5ac63519541 11
Michael J. Spencer 1:f5ac63519541 12 The above copyright notice and this permission notice shall be included in
Michael J. Spencer 1:f5ac63519541 13 all copies or substantial portions of the Software.
Michael J. Spencer 1:f5ac63519541 14
Michael J. Spencer 1:f5ac63519541 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Michael J. Spencer 1:f5ac63519541 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Michael J. Spencer 1:f5ac63519541 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Michael J. Spencer 1:f5ac63519541 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Michael J. Spencer 1:f5ac63519541 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Michael J. Spencer 1:f5ac63519541 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Michael J. Spencer 1:f5ac63519541 21 THE SOFTWARE.
Michael J. Spencer 1:f5ac63519541 22 */
Michael J. Spencer 1:f5ac63519541 23
Michael J. Spencer 1:f5ac63519541 24 #include "usb_mem.h"
Michael J. Spencer 1:f5ac63519541 25
Michael J. Spencer 1:f5ac63519541 26 #include "string.h" //For memcpy, memmove, memset
Michael J. Spencer 1:f5ac63519541 27
Michael J. Spencer 1:f5ac63519541 28 #include "netCfg.h"
Michael J. Spencer 1:f5ac63519541 29 #if NET_USB
Michael J. Spencer 1:f5ac63519541 30
Michael J. Spencer 1:f5ac63519541 31 #define EDS_COUNT 4
Michael J. Spencer 1:f5ac63519541 32 #define TDS_COUNT 8
Michael J. Spencer 1:f5ac63519541 33
Michael J. Spencer 1:f5ac63519541 34 #define HCCA_SIZE 0x100
Michael J. Spencer 1:f5ac63519541 35 #define ED_SIZE 0x10
Michael J. Spencer 1:f5ac63519541 36 #define TD_SIZE 0x10
Michael J. Spencer 1:f5ac63519541 37
Michael J. Spencer 1:f5ac63519541 38 #define TOTAL_SIZE (HCCA_SIZE + (EDS_COUNT*ED_SIZE) + (TDS_COUNT*TD_SIZE))
Michael J. Spencer 1:f5ac63519541 39
Michael J. Spencer 1:f5ac63519541 40
Michael J. Spencer 1:f5ac63519541 41 static volatile __align(256) byte usb_buf[TOTAL_SIZE] __attribute((section("AHBSRAM1"),aligned)); //256 bytes aligned!
Michael J. Spencer 1:f5ac63519541 42
Michael J. Spencer 1:f5ac63519541 43 static volatile byte* usb_hcca; //256 bytes aligned!
Michael J. Spencer 1:f5ac63519541 44
Michael J. Spencer 1:f5ac63519541 45 static volatile byte* usb_edBuf; //4 bytes aligned!
Michael J. Spencer 1:f5ac63519541 46 static volatile byte* usb_tdBuf; //4 bytes aligned!
Michael J. Spencer 1:f5ac63519541 47
Michael J. Spencer 1:f5ac63519541 48 static byte usb_edBufAlloc[EDS_COUNT] __attribute((section("AHBSRAM1"),aligned));
Michael J. Spencer 1:f5ac63519541 49 static byte usb_tdBufAlloc[TDS_COUNT] __attribute((section("AHBSRAM1"),aligned));
Michael J. Spencer 1:f5ac63519541 50
Michael J. Spencer 1:f5ac63519541 51 void usb_mem_init()
Michael J. Spencer 1:f5ac63519541 52 {
Michael J. Spencer 1:f5ac63519541 53 usb_hcca = usb_buf;
Michael J. Spencer 1:f5ac63519541 54 usb_edBuf = usb_buf + HCCA_SIZE;
Michael J. Spencer 1:f5ac63519541 55 usb_tdBuf = usb_buf + HCCA_SIZE + (EDS_COUNT*ED_SIZE);
Michael J. Spencer 1:f5ac63519541 56 memset(usb_edBufAlloc, 0, EDS_COUNT);
Michael J. Spencer 1:f5ac63519541 57 memset(usb_tdBufAlloc, 0, TDS_COUNT);
Michael J. Spencer 1:f5ac63519541 58 }
Michael J. Spencer 1:f5ac63519541 59
Michael J. Spencer 1:f5ac63519541 60 volatile byte* usb_get_hcca()
Michael J. Spencer 1:f5ac63519541 61 {
Michael J. Spencer 1:f5ac63519541 62 return usb_hcca;
Michael J. Spencer 1:f5ac63519541 63 }
Michael J. Spencer 1:f5ac63519541 64
Michael J. Spencer 1:f5ac63519541 65 volatile byte* usb_get_ed()
Michael J. Spencer 1:f5ac63519541 66 {
Michael J. Spencer 1:f5ac63519541 67 int i;
Michael J. Spencer 1:f5ac63519541 68 for(i = 0; i < EDS_COUNT; i++)
Michael J. Spencer 1:f5ac63519541 69 {
Michael J. Spencer 1:f5ac63519541 70 if( !usb_edBufAlloc[i] )
Michael J. Spencer 1:f5ac63519541 71 {
Michael J. Spencer 1:f5ac63519541 72 usb_edBufAlloc[i] = 1;
Michael J. Spencer 1:f5ac63519541 73 return usb_edBuf + i*ED_SIZE;
Michael J. Spencer 1:f5ac63519541 74 }
Michael J. Spencer 1:f5ac63519541 75 }
Michael J. Spencer 1:f5ac63519541 76 return NULL; //Could not alloc ED
Michael J. Spencer 1:f5ac63519541 77 }
Michael J. Spencer 1:f5ac63519541 78
Michael J. Spencer 1:f5ac63519541 79 volatile byte* usb_get_td()
Michael J. Spencer 1:f5ac63519541 80 {
Michael J. Spencer 1:f5ac63519541 81 int i;
Michael J. Spencer 1:f5ac63519541 82 for(i = 0; i < TDS_COUNT; i++)
Michael J. Spencer 1:f5ac63519541 83 {
Michael J. Spencer 1:f5ac63519541 84 if( !usb_tdBufAlloc[i] )
Michael J. Spencer 1:f5ac63519541 85 {
Michael J. Spencer 1:f5ac63519541 86 usb_tdBufAlloc[i] = 1;
Michael J. Spencer 1:f5ac63519541 87 return usb_tdBuf + i*TD_SIZE;
Michael J. Spencer 1:f5ac63519541 88 }
Michael J. Spencer 1:f5ac63519541 89 }
Michael J. Spencer 1:f5ac63519541 90 return NULL; //Could not alloc TD
Michael J. Spencer 1:f5ac63519541 91 }
Michael J. Spencer 1:f5ac63519541 92
Michael J. Spencer 1:f5ac63519541 93 void usb_free_ed(volatile byte* ed)
Michael J. Spencer 1:f5ac63519541 94 {
Michael J. Spencer 1:f5ac63519541 95 int i;
Michael J. Spencer 1:f5ac63519541 96 i = (ed - usb_edBuf) / ED_SIZE;
Michael J. Spencer 1:f5ac63519541 97 usb_edBufAlloc[i] = 0;
Michael J. Spencer 1:f5ac63519541 98 }
Michael J. Spencer 1:f5ac63519541 99
Michael J. Spencer 1:f5ac63519541 100 void usb_free_td(volatile byte* td)
Michael J. Spencer 1:f5ac63519541 101 {
Michael J. Spencer 1:f5ac63519541 102 int i;
Michael J. Spencer 1:f5ac63519541 103 i = (td - usb_tdBuf) / TD_SIZE;
Michael J. Spencer 1:f5ac63519541 104 usb_tdBufAlloc[i] = 0;
Michael J. Spencer 1:f5ac63519541 105 }
Michael J. Spencer 1:f5ac63519541 106
Michael J. Spencer 1:f5ac63519541 107
Michael J. Spencer 1:f5ac63519541 108 #endif