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Add basic communication shell for Legic RF in reader mode. Needs the new receive...
[proxmark3-svn] / bootrom / bootrom.c
... / ...
CommitLineData
1#include <proxmark3.h>\r
2\r
3struct common_area common_area __attribute__((section(".commonarea")));\r
4unsigned int start_addr, end_addr, bootrom_unlocked;\r
5extern char _bootrom_start, _bootrom_end, _flash_start, _flash_end;\r
6\r
7static void ConfigClocks(void)\r
8{\r
9 // we are using a 16 MHz crystal as the basis for everything\r
10 // slow clock runs at 32Khz typical regardless of crystal\r
11\r
12 // enable system clock and USB clock\r
13 AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_PCK | AT91C_PMC_UDP;\r
14\r
15 // enable the clock to the following peripherals\r
16 AT91C_BASE_PMC->PMC_PCER =\r
17 (1<<AT91C_ID_PIOA) |\r
18 (1<<AT91C_ID_ADC) |\r
19 (1<<AT91C_ID_SPI) |\r
20 (1<<AT91C_ID_SSC) |\r
21 (1<<AT91C_ID_PWMC) |\r
22 (1<<AT91C_ID_UDP);\r
23\r
24 // worst case scenario, with 16Mhz xtal startup delay is 14.5ms\r
25 // with a slow clock running at it worst case (max) frequency of 42khz\r
26 // max startup delay = (14.5ms*42k)/8 = 76 = 0x4C round up to 0x50\r
27\r
28 // enable main oscillator and set startup delay\r
29 AT91C_BASE_PMC->PMC_MOR =\r
30 PMC_MAIN_OSC_ENABLE |\r
31 PMC_MAIN_OSC_STARTUP_DELAY(0x50);\r
32\r
33 // wait for main oscillator to stabilize\r
34 while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_STABILIZED) )\r
35 ;\r
36\r
37 // minimum PLL clock frequency is 80 MHz in range 00 (96 here so okay)\r
38 // frequency is crystal * multiplier / divisor = 16Mhz * 12 / 2 = 96Mhz\r
39 AT91C_BASE_PMC->PMC_PLLR =\r
40 PMC_PLL_DIVISOR(2) |\r
41 PMC_PLL_COUNT_BEFORE_LOCK(0x50) |\r
42 PMC_PLL_FREQUENCY_RANGE(0) |\r
43 PMC_PLL_MULTIPLIER(12) |\r
44 PMC_PLL_USB_DIVISOR(1);\r
45\r
46 // wait for PLL to lock\r
47 while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_PLL_LOCK) )\r
48 ;\r
49\r
50 // we want a master clock (MCK) to be PLL clock / 2 = 96Mhz / 2 = 48Mhz\r
51 // as per datasheet, this register must be programmed in two operations\r
52 // when changing to PLL, program the prescaler first then the source\r
53 AT91C_BASE_PMC->PMC_MCKR = PMC_CLK_PRESCALE_DIV_2;\r
54\r
55 // wait for main clock ready signal\r
56 while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_MCK_READY) )\r
57 ;\r
58\r
59 // set the source to PLL\r
60 AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK | PMC_CLK_PRESCALE_DIV_2;\r
61\r
62 // wait for main clock ready signal\r
63 while ( !(AT91C_BASE_PMC->PMC_SR & PMC_MAIN_OSC_MCK_READY) )\r
64 ;\r
65}\r
66\r
67static void Fatal(void)\r
68{\r
69 for(;;);\r
70}\r
71\r
72void UsbPacketReceived(BYTE *packet, int len)\r
73{\r
74 int i, dont_ack=0;\r
75 UsbCommand *c = (UsbCommand *)packet;\r
76 volatile DWORD *p;\r
77\r
78 if(len != sizeof(*c)) {\r
79 Fatal();\r
80 }\r
81\r
82 switch(c->cmd) {\r
83 case CMD_DEVICE_INFO:\r
84 dont_ack = 1;\r
85 c->cmd = CMD_DEVICE_INFO;\r
86 c->ext1 = DEVICE_INFO_FLAG_BOOTROM_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM |\r
87 DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH;\r
88 if(common_area.flags.osimage_present) c->ext1 |= DEVICE_INFO_FLAG_OSIMAGE_PRESENT;\r
89 UsbSendPacket(packet, len);\r
90 break;\r
91\r
92 case CMD_SETUP_WRITE:\r
93 /* The temporary write buffer of the embedded flash controller is mapped to the\r
94 * whole memory region, only the last 8 bits are decoded.\r
95 */\r
96 p = (volatile DWORD *)&_flash_start;\r
97 for(i = 0; i < 12; i++) {\r
98 p[i+c->ext1] = c->d.asDwords[i];\r
99 }\r
100 break;\r
101\r
102 case CMD_FINISH_WRITE:\r
103 p = (volatile DWORD *)&_flash_start;\r
104 for(i = 0; i < 4; i++) {\r
105 p[i+60] = c->d.asDwords[i];\r
106 }\r
107\r
108 /* Check that the address that we are supposed to write to is within our allowed region */\r
109 if( ((c->ext1+AT91C_IFLASH_PAGE_SIZE-1) >= end_addr) || (c->ext1 < start_addr) ) {\r
110 /* Disallow write */\r
111 dont_ack = 1;\r
112 c->cmd = CMD_NACK;\r
113 UsbSendPacket(packet, len);\r
114 } else {\r
115 /* Translate address to flash page and do flash, update here for the 512k part */\r
116 AT91C_BASE_EFC0->EFC_FCR = MC_FLASH_COMMAND_KEY |\r
117 MC_FLASH_COMMAND_PAGEN((c->ext1-(int)&_flash_start)/AT91C_IFLASH_PAGE_SIZE) |\r
118 AT91C_MC_FCMD_START_PROG;\r
119 }\r
120 while(!(AT91C_BASE_EFC0->EFC_FSR & MC_FLASH_STATUS_READY))\r
121 ;\r
122 break;\r
123\r
124 case CMD_HARDWARE_RESET:\r
125 USB_D_PLUS_PULLUP_OFF();\r
126 AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;\r
127 break;\r
128\r
129 case CMD_START_FLASH:\r
130 if(c->ext3 == START_FLASH_MAGIC) bootrom_unlocked = 1;\r
131 else bootrom_unlocked = 0;\r
132 {\r
133 int prot_start = (int)&_bootrom_start;\r
134 int prot_end = (int)&_bootrom_end;\r
135 int allow_start = (int)&_flash_start;\r
136 int allow_end = (int)&_flash_end;\r
137 int cmd_start = c->ext1;\r
138 int cmd_end = c->ext2;\r
139\r
140 /* Only allow command if the bootrom is unlocked, or the parameters are outside of the protected\r
141 * bootrom area. In any case they must be within the flash area.\r
142 */\r
143 if( (bootrom_unlocked || ((cmd_start >= prot_end) || (cmd_end < prot_start)))\r
144 && (cmd_start >= allow_start) && (cmd_end <= allow_end) ) {\r
145 start_addr = cmd_start;\r
146 end_addr = cmd_end;\r
147 } else {\r
148 start_addr = end_addr = 0;\r
149 dont_ack = 1;\r
150 c->cmd = CMD_NACK;\r
151 UsbSendPacket(packet, len);\r
152 }\r
153 }\r
154 break;\r
155\r
156 default:\r
157 Fatal();\r
158 break;\r
159 }\r
160\r
161 if(!dont_ack) {\r
162 c->cmd = CMD_ACK;\r
163 UsbSendPacket(packet, len);\r
164 }\r
165}\r
166\r
167static void flash_mode(int externally_entered)\r
168{\r
169 start_addr = 0;\r
170 end_addr = 0;\r
171 bootrom_unlocked = 0;\r
172\r
173 UsbStart();\r
174 for(;;) {\r
175 WDT_HIT();\r
176\r
177 UsbPoll(TRUE);\r
178\r
179 if(!externally_entered && !BUTTON_PRESS()) {\r
180 /* Perform a reset to leave flash mode */\r
181 USB_D_PLUS_PULLUP_OFF();\r
182 LED_B_ON();\r
183 AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;\r
184 for(;;);\r
185 }\r
186 if(externally_entered && BUTTON_PRESS()) {\r
187 /* Let the user's button press override the automatic leave */\r
188 externally_entered = 0;\r
189 }\r
190 }\r
191}\r
192\r
193extern char _osimage_entry;\r
194void BootROM(void)\r
195{\r
196 //------------\r
197 // First set up all the I/O pins; GPIOs configured directly, other ones\r
198 // just need to be assigned to the appropriate peripheral.\r
199\r
200 // Kill all the pullups, especially the one on USB D+; leave them for\r
201 // the unused pins, though.\r
202 AT91C_BASE_PIOA->PIO_PPUDR =\r
203 GPIO_USB_PU |\r
204 GPIO_LED_A |\r
205 GPIO_LED_B |\r
206 GPIO_LED_C |\r
207 GPIO_LED_D |\r
208 GPIO_FPGA_DIN |\r
209 GPIO_FPGA_DOUT |\r
210 GPIO_FPGA_CCLK |\r
211 GPIO_FPGA_NINIT |\r
212 GPIO_FPGA_NPROGRAM |\r
213 GPIO_FPGA_DONE |\r
214 GPIO_MUXSEL_HIPKD |\r
215 GPIO_MUXSEL_HIRAW |\r
216 GPIO_MUXSEL_LOPKD |\r
217 GPIO_MUXSEL_LORAW |\r
218 GPIO_RELAY |\r
219 GPIO_NVDD_ON;\r
220 // (and add GPIO_FPGA_ON)\r
221 // These pins are outputs\r
222 AT91C_BASE_PIOA->PIO_OER =\r
223 GPIO_LED_A |\r
224 GPIO_LED_B |\r
225 GPIO_LED_C |\r
226 GPIO_LED_D |\r
227 GPIO_RELAY |\r
228 GPIO_NVDD_ON;\r
229 // PIO controls the following pins\r
230 AT91C_BASE_PIOA->PIO_PER =\r
231 GPIO_USB_PU |\r
232 GPIO_LED_A |\r
233 GPIO_LED_B |\r
234 GPIO_LED_C |\r
235 GPIO_LED_D;\r
236\r
237 USB_D_PLUS_PULLUP_OFF();\r
238 LED_D_OFF();\r
239 LED_C_ON();\r
240 LED_B_OFF();\r
241 LED_A_OFF();\r
242\r
243 // if 512K FLASH part - TODO make some defines :)\r
244 if ((AT91C_BASE_DBGU->DBGU_CIDR | 0xf00) == 0xa00) {\r
245 AT91C_BASE_EFC0->EFC_FMR =\r
246 MC_FLASH_MODE_FLASH_WAIT_STATES(1) |\r
247 MC_FLASH_MODE_MASTER_CLK_IN_MHZ(0x48);\r
248 AT91C_BASE_EFC1->EFC_FMR =\r
249 MC_FLASH_MODE_FLASH_WAIT_STATES(1) |\r
250 MC_FLASH_MODE_MASTER_CLK_IN_MHZ(0x48);\r
251 } else {\r
252 AT91C_BASE_EFC0->EFC_FMR =\r
253 MC_FLASH_MODE_FLASH_WAIT_STATES(0) |\r
254 MC_FLASH_MODE_MASTER_CLK_IN_MHZ(48);\r
255 }\r
256\r
257 // Initialize all system clocks\r
258 ConfigClocks();\r
259\r
260 LED_A_ON();\r
261\r
262 int common_area_present = 0;\r
263 switch(AT91C_BASE_RSTC->RSTC_RSR & AT91C_RSTC_RSTTYP) {\r
264 case AT91C_RSTC_RSTTYP_WATCHDOG:\r
265 case AT91C_RSTC_RSTTYP_SOFTWARE:\r
266 case AT91C_RSTC_RSTTYP_USER:\r
267 /* In these cases the common_area in RAM should be ok, retain it if it's there */\r
268 if(common_area.magic == COMMON_AREA_MAGIC && common_area.version == 1) {\r
269 common_area_present = 1;\r
270 }\r
271 break;\r
272 default: /* Otherwise, initialize it from scratch */\r
273 break;\r
274 }\r
275\r
276 if(!common_area_present){\r
277 /* Common area not ok, initialize it */\r
278 int i; for(i=0; i<sizeof(common_area); i++) { /* Makeshift memset, no need to drag util.c into this */\r
279 ((char*)&common_area)[i] = 0;\r
280 }\r
281 common_area.magic = COMMON_AREA_MAGIC;\r
282 common_area.version = 1;\r
283 common_area.flags.bootrom_present = 1;\r
284 }\r
285\r
286 common_area.flags.bootrom_present = 1;\r
287 if(common_area.command == COMMON_AREA_COMMAND_ENTER_FLASH_MODE) {\r
288 common_area.command = COMMON_AREA_COMMAND_NONE;\r
289 flash_mode(1);\r
290 } else if(BUTTON_PRESS()) {\r
291 flash_mode(0);\r
292 } else {\r
293 // jump to Flash address of the osimage entry point (LSBit set for thumb mode)\r
294 asm("bx %0\n" : : "r" ( ((int)&_osimage_entry) | 0x1 ) );\r
295 }\r
296}\r
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