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drv/usb/usb_mem.c@0:ac1725ba162c, 2010-11-09 (annotated)
- Committer:
- segundo
- Date:
- Tue Nov 09 20:54:15 2010 +0000
- Revision:
- 0:ac1725ba162c
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| segundo | 0:ac1725ba162c | 1 | |
| segundo | 0:ac1725ba162c | 2 | /* |
| segundo | 0:ac1725ba162c | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| segundo | 0:ac1725ba162c | 4 | |
| segundo | 0:ac1725ba162c | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| segundo | 0:ac1725ba162c | 6 | of this software and associated documentation files (the "Software"), to deal |
| segundo | 0:ac1725ba162c | 7 | in the Software without restriction, including without limitation the rights |
| segundo | 0:ac1725ba162c | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| segundo | 0:ac1725ba162c | 9 | copies of the Software, and to permit persons to whom the Software is |
| segundo | 0:ac1725ba162c | 10 | furnished to do so, subject to the following conditions: |
| segundo | 0:ac1725ba162c | 11 | |
| segundo | 0:ac1725ba162c | 12 | The above copyright notice and this permission notice shall be included in |
| segundo | 0:ac1725ba162c | 13 | all copies or substantial portions of the Software. |
| segundo | 0:ac1725ba162c | 14 | |
| segundo | 0:ac1725ba162c | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| segundo | 0:ac1725ba162c | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| segundo | 0:ac1725ba162c | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| segundo | 0:ac1725ba162c | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| segundo | 0:ac1725ba162c | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| segundo | 0:ac1725ba162c | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| segundo | 0:ac1725ba162c | 21 | THE SOFTWARE. |
| segundo | 0:ac1725ba162c | 22 | */ |
| segundo | 0:ac1725ba162c | 23 | |
| segundo | 0:ac1725ba162c | 24 | #include "usb_mem.h" |
| segundo | 0:ac1725ba162c | 25 | |
| segundo | 0:ac1725ba162c | 26 | #include "string.h" //For memcpy, memmove, memset |
| segundo | 0:ac1725ba162c | 27 | |
| segundo | 0:ac1725ba162c | 28 | #include "netCfg.h" |
| segundo | 0:ac1725ba162c | 29 | #if NET_USB |
| segundo | 0:ac1725ba162c | 30 | |
| segundo | 0:ac1725ba162c | 31 | #define EDS_COUNT 4 |
| segundo | 0:ac1725ba162c | 32 | #define TDS_COUNT 8 |
| segundo | 0:ac1725ba162c | 33 | |
| segundo | 0:ac1725ba162c | 34 | #define HCCA_SIZE 0x100 |
| segundo | 0:ac1725ba162c | 35 | #define ED_SIZE 0x10 |
| segundo | 0:ac1725ba162c | 36 | #define TD_SIZE 0x10 |
| segundo | 0:ac1725ba162c | 37 | |
| segundo | 0:ac1725ba162c | 38 | #define TOTAL_SIZE (HCCA_SIZE + (EDS_COUNT*ED_SIZE) + (TDS_COUNT*TD_SIZE)) |
| segundo | 0:ac1725ba162c | 39 | |
| segundo | 0:ac1725ba162c | 40 | |
| segundo | 0:ac1725ba162c | 41 | static volatile __align(256) byte usb_buf[TOTAL_SIZE] __attribute((section("AHBSRAM1"),aligned)); //256 bytes aligned! |
| segundo | 0:ac1725ba162c | 42 | |
| segundo | 0:ac1725ba162c | 43 | static volatile byte* usb_hcca; //256 bytes aligned! |
| segundo | 0:ac1725ba162c | 44 | |
| segundo | 0:ac1725ba162c | 45 | static volatile byte* usb_edBuf; //4 bytes aligned! |
| segundo | 0:ac1725ba162c | 46 | static volatile byte* usb_tdBuf; //4 bytes aligned! |
| segundo | 0:ac1725ba162c | 47 | |
| segundo | 0:ac1725ba162c | 48 | static byte usb_edBufAlloc[EDS_COUNT] __attribute((section("AHBSRAM1"),aligned)); |
| segundo | 0:ac1725ba162c | 49 | static byte usb_tdBufAlloc[TDS_COUNT] __attribute((section("AHBSRAM1"),aligned)); |
| segundo | 0:ac1725ba162c | 50 | |
| segundo | 0:ac1725ba162c | 51 | void usb_mem_init() |
| segundo | 0:ac1725ba162c | 52 | { |
| segundo | 0:ac1725ba162c | 53 | usb_hcca = usb_buf; |
| segundo | 0:ac1725ba162c | 54 | usb_edBuf = usb_buf + HCCA_SIZE; |
| segundo | 0:ac1725ba162c | 55 | usb_tdBuf = usb_buf + HCCA_SIZE + (EDS_COUNT*ED_SIZE); |
| segundo | 0:ac1725ba162c | 56 | memset(usb_edBufAlloc, 0, EDS_COUNT); |
| segundo | 0:ac1725ba162c | 57 | memset(usb_tdBufAlloc, 0, TDS_COUNT); |
| segundo | 0:ac1725ba162c | 58 | } |
| segundo | 0:ac1725ba162c | 59 | |
| segundo | 0:ac1725ba162c | 60 | volatile byte* usb_get_hcca() |
| segundo | 0:ac1725ba162c | 61 | { |
| segundo | 0:ac1725ba162c | 62 | return usb_hcca; |
| segundo | 0:ac1725ba162c | 63 | } |
| segundo | 0:ac1725ba162c | 64 | |
| segundo | 0:ac1725ba162c | 65 | volatile byte* usb_get_ed() |
| segundo | 0:ac1725ba162c | 66 | { |
| segundo | 0:ac1725ba162c | 67 | int i; |
| segundo | 0:ac1725ba162c | 68 | for(i = 0; i < EDS_COUNT; i++) |
| segundo | 0:ac1725ba162c | 69 | { |
| segundo | 0:ac1725ba162c | 70 | if( !usb_edBufAlloc[i] ) |
| segundo | 0:ac1725ba162c | 71 | { |
| segundo | 0:ac1725ba162c | 72 | usb_edBufAlloc[i] = 1; |
| segundo | 0:ac1725ba162c | 73 | return usb_edBuf + i*ED_SIZE; |
| segundo | 0:ac1725ba162c | 74 | } |
| segundo | 0:ac1725ba162c | 75 | } |
| segundo | 0:ac1725ba162c | 76 | return NULL; //Could not alloc ED |
| segundo | 0:ac1725ba162c | 77 | } |
| segundo | 0:ac1725ba162c | 78 | |
| segundo | 0:ac1725ba162c | 79 | volatile byte* usb_get_td() |
| segundo | 0:ac1725ba162c | 80 | { |
| segundo | 0:ac1725ba162c | 81 | int i; |
| segundo | 0:ac1725ba162c | 82 | for(i = 0; i < TDS_COUNT; i++) |
| segundo | 0:ac1725ba162c | 83 | { |
| segundo | 0:ac1725ba162c | 84 | if( !usb_tdBufAlloc[i] ) |
| segundo | 0:ac1725ba162c | 85 | { |
| segundo | 0:ac1725ba162c | 86 | usb_tdBufAlloc[i] = 1; |
| segundo | 0:ac1725ba162c | 87 | return usb_tdBuf + i*TD_SIZE; |
| segundo | 0:ac1725ba162c | 88 | } |
| segundo | 0:ac1725ba162c | 89 | } |
| segundo | 0:ac1725ba162c | 90 | return NULL; //Could not alloc TD |
| segundo | 0:ac1725ba162c | 91 | } |
| segundo | 0:ac1725ba162c | 92 | |
| segundo | 0:ac1725ba162c | 93 | void usb_free_ed(volatile byte* ed) |
| segundo | 0:ac1725ba162c | 94 | { |
| segundo | 0:ac1725ba162c | 95 | int i; |
| segundo | 0:ac1725ba162c | 96 | i = (ed - usb_edBuf) / ED_SIZE; |
| segundo | 0:ac1725ba162c | 97 | usb_edBufAlloc[i] = 0; |
| segundo | 0:ac1725ba162c | 98 | } |
| segundo | 0:ac1725ba162c | 99 | |
| segundo | 0:ac1725ba162c | 100 | void usb_free_td(volatile byte* td) |
| segundo | 0:ac1725ba162c | 101 | { |
| segundo | 0:ac1725ba162c | 102 | int i; |
| segundo | 0:ac1725ba162c | 103 | i = (td - usb_tdBuf) / TD_SIZE; |
| segundo | 0:ac1725ba162c | 104 | usb_tdBufAlloc[i] = 0; |
| segundo | 0:ac1725ba162c | 105 | } |
| segundo | 0:ac1725ba162c | 106 | |
| segundo | 0:ac1725ba162c | 107 | |
| segundo | 0:ac1725ba162c | 108 | #endif |