[11] | 1 | /* |
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| 2 | * 2nd - OMAP "second stage" tt-loader |
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| 3 | * |
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| 4 | * Copyright (C) 2008 Guillaume Bougard <gbougard@pkg.fr> |
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| 5 | * Copyright (C) 2005 Luis Recuerda <lrec@helios.homeip.net> |
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| 6 | * |
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| 7 | * This program is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU General Public License |
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| 9 | * as published by the Free Software Foundation; either version 2 |
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| 10 | * of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * This program is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | * GNU General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU General Public License |
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| 18 | * along with this program; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 20 | * |
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| 21 | */ |
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| 22 | |
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| 23 | #include "config.h" |
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| 24 | #include "usb.h" |
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| 25 | |
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| 26 | #define _LSR_ ((volatile u8 *) 0xfffb0014) |
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| 27 | #define _THR_ ((volatile u8 *) 0xfffb0000) |
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| 28 | #define _RHR_ ((volatile u8 *) 0xfffb0000) |
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| 29 | |
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| 30 | #define MEM_READ_SIZE 32 |
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| 31 | |
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| 32 | static char *usb_hdr = "TIS" ; |
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| 33 | static char usb_outbuffer[64]; |
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| 34 | |
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| 35 | // limited strcpy |
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| 36 | static u32 strcpy ( char *dest, char *src ) |
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| 37 | { |
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| 38 | u32 count = 0 ; |
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| 39 | char *tmp = dest, *s = src; |
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| 40 | |
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| 41 | while ( ++count < 256 && *s != '\0' ) |
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| 42 | *tmp++ = *s++ ; |
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| 43 | |
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| 44 | *tmp = '\0' ; |
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| 45 | |
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| 46 | return count ; |
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| 47 | } |
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| 48 | |
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| 49 | static u32 memcpy ( char *dest, char *src, u32 count ) |
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| 50 | { |
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| 51 | char *tmp = dest, *s = src; |
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| 52 | u32 step = count ; |
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| 53 | |
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| 54 | while (step--) |
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| 55 | *tmp++ = *s++; |
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| 56 | |
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| 57 | return count ; |
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| 58 | } |
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| 59 | |
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| 60 | static void bsend (char ch) |
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| 61 | { |
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| 62 | while (!((*_LSR_) & 0x20)); |
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| 63 | *_THR_= ch; |
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| 64 | } |
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| 65 | |
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| 66 | static inline int check_serial (void) { return (*_LSR_) & 0x01; } |
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| 67 | |
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| 68 | static char brecv (void) |
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| 69 | { |
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| 70 | while (!((*_LSR_) & 0x01)); |
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| 71 | return *_RHR_; |
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| 72 | } |
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| 73 | |
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| 74 | char crecv (void) |
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| 75 | { |
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| 76 | return brecv (); |
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| 77 | } |
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| 78 | |
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| 79 | void csend (char ch) |
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| 80 | { |
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| 81 | if (ch == '\n') |
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| 82 | bsend ('\r'); |
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| 83 | bsend (ch); |
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| 84 | } |
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| 85 | |
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| 86 | void tsend (const char *text) |
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| 87 | { |
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| 88 | while (*text) |
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| 89 | csend (*text++); |
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| 90 | } |
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| 91 | |
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| 92 | void xsend (unsigned value) |
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| 93 | { |
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| 94 | if (value < 10) |
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| 95 | bsend (value + '0'); |
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| 96 | else |
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| 97 | bsend (value + ('A'-10)); |
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| 98 | } |
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| 99 | |
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| 100 | void x8send (u8 value) |
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| 101 | { |
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| 102 | xsend (value >> 4); |
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| 103 | xsend (value & 0xf); |
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| 104 | } |
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| 105 | |
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| 106 | void x16send (u16 value) |
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| 107 | { |
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| 108 | int i; |
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| 109 | for (i= 0; i < 4; ++i) |
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| 110 | { |
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| 111 | xsend (value >> 12); |
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| 112 | value<<= 4; |
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| 113 | } |
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| 114 | } |
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| 115 | |
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| 116 | void x32send (u32 value) |
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| 117 | { |
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| 118 | int i; |
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| 119 | for (i= 0; i < 8; ++i) |
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| 120 | { |
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| 121 | xsend (value >> 28); |
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| 122 | value<<= 4; |
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| 123 | } |
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| 124 | } |
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| 125 | |
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| 126 | static void usb_msg (const char cmd, const char *msg) |
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| 127 | { |
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| 128 | u32 len = strcpy(usb_outbuffer,usb_hdr); |
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| 129 | usb_outbuffer[len-1] = cmd ; |
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| 130 | |
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| 131 | len += strcpy(&usb_outbuffer[len], msg ? (char *)msg : "" ); |
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| 132 | |
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| 133 | usb_send ( usb_outbuffer, len); |
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| 134 | while (!usb_sent ()); |
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| 135 | } |
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| 136 | |
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| 137 | static u32 usb_code (char cmd, u32 code) |
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| 138 | { |
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| 139 | u32 len = strcpy(usb_outbuffer,usb_hdr); |
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| 140 | usb_outbuffer[len-1] = cmd ; |
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| 141 | (*(u32 *)(usb_outbuffer+len)) = code ; |
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| 142 | len += sizeof(u32); |
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| 143 | |
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| 144 | usb_send ( usb_outbuffer, len ); |
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| 145 | while (!usb_sent ()); |
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| 146 | return code ; |
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| 147 | } |
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| 148 | |
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| 149 | static void usb_blk (const char cmd, char *mem, u32 size) |
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| 150 | { |
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| 151 | u32 len = strcpy(usb_outbuffer,usb_hdr); |
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| 152 | usb_outbuffer[len-1] = cmd ; |
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| 153 | |
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| 154 | len += memcpy(usb_outbuffer+len,mem,size); |
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| 155 | |
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| 156 | usb_send ( usb_outbuffer, len ); |
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| 157 | while (!usb_sent ()); |
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| 158 | } |
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| 159 | |
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| 160 | // Code from linux-2.6.24.3/arch/arm/mach-omap1/id.c source |
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| 161 | static u16 omap_get_jtag_id(void) |
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| 162 | { |
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| 163 | u32 prod_id, jtag_id; |
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| 164 | |
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| 165 | prod_id = omap_readl(OMAP_PRODUCTION_ID_1); |
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| 166 | jtag_id = omap_readl(OMAP32_ID_1); |
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| 167 | |
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| 168 | /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730 */ |
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| 169 | if (((prod_id >> 20) == 0) || (prod_id == jtag_id)) |
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| 170 | prod_id = 0; |
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| 171 | else |
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| 172 | prod_id &= 0xffff; |
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| 173 | |
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| 174 | if (prod_id) |
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| 175 | return prod_id; |
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| 176 | |
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| 177 | /* Use OMAP32_ID_1 as fallback */ |
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| 178 | prod_id = ((jtag_id >> 12) & 0xffff); |
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| 179 | |
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| 180 | return prod_id; |
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| 181 | } |
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| 182 | |
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| 183 | u32 _main (void) |
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| 184 | { |
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| 185 | u32 address = CFG_LOADADDR ; |
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| 186 | usb_msg ('m', "In omap plateform"); |
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| 187 | |
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| 188 | u16 prod_id = omap_get_jtag_id(); |
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| 189 | switch (prod_id) |
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| 190 | { |
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| 191 | case 0xb55f: |
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| 192 | usb_msg ('m', "Found supported omap730"); |
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| 193 | break; |
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| 194 | default: |
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| 195 | usb_msg ('m', "Unsupported plateform found"); |
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| 196 | usb_code ('v', (u32) prod_id); |
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| 197 | break; |
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| 198 | } |
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| 199 | |
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| 200 | // Ready to manage requests |
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| 201 | usb_msg ('r', "Waiting first request"); |
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| 202 | |
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| 203 | for (;;) |
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| 204 | { |
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| 205 | u32 total, cmd, index = 0 ; |
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| 206 | |
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| 207 | u8 usb_inbuffer[64]; |
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| 208 | usb_recv (usb_inbuffer, sizeof (usb_inbuffer)); |
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| 209 | while (!usb_rcvd ()); |
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| 210 | |
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| 211 | // Check we are knowing the provided header |
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| 212 | while ( usb_inbuffer[index] == (u8) usb_hdr[index] && usb_hdr[index] != '\0' ) |
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| 213 | index++ ; |
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| 214 | |
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| 215 | if ( usb_hdr[index] != '\0' ) |
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| 216 | continue ; |
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| 217 | |
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| 218 | cmd = usb_inbuffer[index++] ; |
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| 219 | |
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| 220 | if ((char)cmd == 's') // Ask size to upload |
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| 221 | { |
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| 222 | total= *(u32 *) &usb_inbuffer[index]; |
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| 223 | u32 size = 0; |
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| 224 | |
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| 225 | usb_code ('n', total); |
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| 226 | |
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| 227 | while (size < total) |
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| 228 | { |
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| 229 | u32 r; |
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| 230 | |
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| 231 | usb_recv ((u8 *)address, sizeof (usb_inbuffer)); |
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| 232 | while ((r= usb_rcvd ()) == 0); |
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| 233 | |
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| 234 | address += r ; |
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| 235 | size += r ; |
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| 236 | } |
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| 237 | |
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| 238 | usb_code ('o', size); |
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| 239 | |
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| 240 | } else |
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| 241 | if ((char)cmd == 'f') // load file ACK |
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| 242 | { |
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| 243 | usb_msg ('f', (const char *)&usb_inbuffer[index]); |
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| 244 | |
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| 245 | } else |
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| 246 | if ((char)cmd == 'M') // dump memory command |
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| 247 | { |
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| 248 | usb_blk ('M', (char *)address, MEM_READ_SIZE); |
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| 249 | address += MEM_READ_SIZE ; |
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| 250 | |
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| 251 | } else |
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| 252 | if ((char)cmd == 'a') // set address command |
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| 253 | { |
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| 254 | address = *(u32 *) &usb_inbuffer[index]; |
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| 255 | usb_code ('i', address); |
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| 256 | |
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| 257 | } else |
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| 258 | if ((char)cmd == 'c') // call command |
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| 259 | { |
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| 260 | index = ((u32_fnc_t *)address)(); |
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| 261 | usb_code ('i', index); |
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| 262 | |
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| 263 | } else |
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| 264 | if ((char)cmd == 'b') // boot command |
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| 265 | { |
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| 266 | usb_code ('b', address ); |
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| 267 | // Just return the address where is store the branch to do |
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| 268 | u32 bootaddress = (u32) &address ; // Convert/cast address just to avoid gcc warning |
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| 269 | return bootaddress ; |
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| 270 | } |
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| 271 | } |
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| 272 | } |
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