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1 | /* | |
2 | * (C) Copyright 2001-2004 | |
3 | * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com | |
4 | * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com | |
5 | * | |
6 | * SPDX-License-Identifier: GPL-2.0+ | |
7 | */ | |
8 | ||
9 | #include <common.h> | |
10 | #include <asm/processor.h> | |
11 | #include <asm/io.h> | |
12 | #include <command.h> | |
13 | ||
14 | /* ------------------------------------------------------------------------- */ | |
15 | ||
16 | #ifdef FPGA_DEBUG | |
17 | #define DBG(x...) printf(x) | |
18 | #else | |
19 | #define DBG(x...) | |
20 | #endif /* DEBUG */ | |
21 | ||
22 | #define MAX_ONES 226 | |
23 | ||
24 | #ifdef CONFIG_SYS_FPGA_PRG | |
25 | # define FPGA_PRG CONFIG_SYS_FPGA_PRG /* FPGA program pin (ppc output) */ | |
26 | # define FPGA_CLK CONFIG_SYS_FPGA_CLK /* FPGA clk pin (ppc output) */ | |
27 | # define FPGA_DATA CONFIG_SYS_FPGA_DATA /* FPGA data pin (ppc output) */ | |
28 | # define FPGA_DONE CONFIG_SYS_FPGA_DONE /* FPGA done pin (ppc input) */ | |
29 | # define FPGA_INIT CONFIG_SYS_FPGA_INIT /* FPGA init pin (ppc input) */ | |
30 | #else | |
31 | # define FPGA_PRG 0x04000000 /* FPGA program pin (ppc output) */ | |
32 | # define FPGA_CLK 0x02000000 /* FPGA clk pin (ppc output) */ | |
33 | # define FPGA_DATA 0x01000000 /* FPGA data pin (ppc output) */ | |
34 | # define FPGA_DONE 0x00800000 /* FPGA done pin (ppc input) */ | |
35 | # define FPGA_INIT 0x00400000 /* FPGA init pin (ppc input) */ | |
36 | #endif | |
37 | ||
38 | #define ERROR_FPGA_PRG_INIT_LOW -1 /* Timeout after PRG* asserted */ | |
39 | #define ERROR_FPGA_PRG_INIT_HIGH -2 /* Timeout after PRG* deasserted */ | |
40 | #define ERROR_FPGA_PRG_DONE -3 /* Timeout after programming */ | |
41 | ||
42 | #ifndef SET_FPGA | |
43 | # define SET_FPGA(data) out_be32((void *)GPIO0_OR, data) | |
44 | #endif | |
45 | ||
46 | #ifdef FPGA_PROG_ACTIVE_HIGH | |
47 | # define FPGA_PRG_LOW FPGA_PRG | |
48 | # define FPGA_PRG_HIGH 0 | |
49 | #else | |
50 | # define FPGA_PRG_LOW 0 | |
51 | # define FPGA_PRG_HIGH FPGA_PRG | |
52 | #endif | |
53 | ||
54 | #define FPGA_CLK_LOW 0 | |
55 | #define FPGA_CLK_HIGH FPGA_CLK | |
56 | ||
57 | #define FPGA_DATA_LOW 0 | |
58 | #define FPGA_DATA_HIGH FPGA_DATA | |
59 | ||
60 | #define FPGA_WRITE_1 { \ | |
61 | SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set clock to 0 */ \ | |
62 | SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set data to 1 */ \ | |
63 | SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set clock to 1 */ \ | |
64 | SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH);} /* set data to 1 */ | |
65 | ||
66 | #define FPGA_WRITE_0 { \ | |
67 | SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set clock to 0 */ \ | |
68 | SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_LOW); /* set data to 0 */ \ | |
69 | SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_LOW); /* set clock to 1 */ \ | |
70 | SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH);} /* set data to 1 */ | |
71 | ||
72 | #ifndef FPGA_DONE_STATE | |
73 | # define FPGA_DONE_STATE (in_be32((void *)GPIO0_IR) & FPGA_DONE) | |
74 | #endif | |
75 | #ifndef FPGA_INIT_STATE | |
76 | # define FPGA_INIT_STATE (in_be32((void *)GPIO0_IR) & FPGA_INIT) | |
77 | #endif | |
78 | ||
79 | ||
80 | static int fpga_boot (const unsigned char *fpgadata, int size) | |
81 | { | |
82 | int i, index, len; | |
83 | int count; | |
84 | unsigned char b; | |
85 | ||
86 | #ifdef CONFIG_SYS_FPGA_SPARTAN2 | |
87 | int j; | |
88 | #else | |
89 | int bit; | |
90 | #endif | |
91 | ||
92 | /* display infos on fpgaimage */ | |
93 | index = 15; | |
94 | for (i = 0; i < 4; i++) { | |
95 | len = fpgadata[index]; | |
96 | DBG ("FPGA: %s\n", &(fpgadata[index + 1])); | |
97 | index += len + 3; | |
98 | } | |
99 | ||
100 | #ifdef CONFIG_SYS_FPGA_SPARTAN2 | |
101 | /* search for preamble 0xFFFFFFFF */ | |
102 | while (1) { | |
103 | if ((fpgadata[index] == 0xff) && (fpgadata[index + 1] == 0xff) | |
104 | && (fpgadata[index + 2] == 0xff) | |
105 | && (fpgadata[index + 3] == 0xff)) | |
106 | break; /* preamble found */ | |
107 | else | |
108 | index++; | |
109 | } | |
110 | #else | |
111 | /* search for preamble 0xFF2X */ | |
112 | for (index = 0; index < size - 1; index++) { | |
113 | if ((fpgadata[index] == 0xff) | |
114 | && ((fpgadata[index + 1] & 0xf0) == 0x30)) | |
115 | break; | |
116 | } | |
117 | index += 2; | |
118 | #endif | |
119 | ||
120 | DBG ("FPGA: configdata starts at position 0x%x\n", index); | |
121 | DBG ("FPGA: length of fpga-data %d\n", size - index); | |
122 | ||
123 | /* | |
124 | * Setup port pins for fpga programming | |
125 | */ | |
126 | #ifndef CONFIG_M5249 | |
127 | out_be32 ((void *)GPIO0_ODR, 0x00000000); /* no open drain pins */ | |
128 | /* setup for output */ | |
129 | out_be32 ((void *)GPIO0_TCR, | |
130 | in_be32 ((void *)GPIO0_TCR) | | |
131 | FPGA_PRG | FPGA_CLK | FPGA_DATA); | |
132 | #endif | |
133 | SET_FPGA (FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set pins to high */ | |
134 | ||
135 | DBG ("%s, ", (FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE"); | |
136 | DBG ("%s\n", (FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT"); | |
137 | ||
138 | /* | |
139 | * Init fpga by asserting and deasserting PROGRAM* | |
140 | */ | |
141 | SET_FPGA (FPGA_PRG_LOW | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set prog active */ | |
142 | ||
143 | /* Wait for FPGA init line low */ | |
144 | count = 0; | |
145 | while (FPGA_INIT_STATE) { | |
146 | udelay (1000); /* wait 1ms */ | |
147 | /* Check for timeout - 100us max, so use 3ms */ | |
148 | if (count++ > 3) { | |
149 | DBG ("FPGA: Booting failed!\n"); | |
150 | return ERROR_FPGA_PRG_INIT_LOW; | |
151 | } | |
152 | } | |
153 | ||
154 | DBG ("%s, ", (FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE"); | |
155 | DBG ("%s\n", (FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT"); | |
156 | ||
157 | /* deassert PROGRAM* */ | |
158 | SET_FPGA (FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set prog inactive */ | |
159 | ||
160 | /* Wait for FPGA end of init period . */ | |
161 | count = 0; | |
162 | while (!(FPGA_INIT_STATE)) { | |
163 | udelay (1000); /* wait 1ms */ | |
164 | /* Check for timeout */ | |
165 | if (count++ > 3) { | |
166 | DBG ("FPGA: Booting failed!\n"); | |
167 | return ERROR_FPGA_PRG_INIT_HIGH; | |
168 | } | |
169 | } | |
170 | ||
171 | DBG ("%s, ", (FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE"); | |
172 | DBG ("%s\n", (FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT"); | |
173 | ||
174 | DBG ("write configuration data into fpga\n"); | |
175 | /* write configuration-data into fpga... */ | |
176 | ||
177 | #ifdef CONFIG_SYS_FPGA_SPARTAN2 | |
178 | /* | |
179 | * Load uncompressed image into fpga | |
180 | */ | |
181 | for (i = index; i < size; i++) { | |
182 | b = fpgadata[i]; | |
183 | for (j = 0; j < 8; j++) { | |
184 | if ((b & 0x80) == 0x80) { | |
185 | FPGA_WRITE_1; | |
186 | } else { | |
187 | FPGA_WRITE_0; | |
188 | } | |
189 | b <<= 1; | |
190 | } | |
191 | } | |
192 | #else | |
193 | /* send 0xff 0x20 */ | |
194 | FPGA_WRITE_1; | |
195 | FPGA_WRITE_1; | |
196 | FPGA_WRITE_1; | |
197 | FPGA_WRITE_1; | |
198 | FPGA_WRITE_1; | |
199 | FPGA_WRITE_1; | |
200 | FPGA_WRITE_1; | |
201 | FPGA_WRITE_1; | |
202 | FPGA_WRITE_0; | |
203 | FPGA_WRITE_0; | |
204 | FPGA_WRITE_1; | |
205 | FPGA_WRITE_0; | |
206 | FPGA_WRITE_0; | |
207 | FPGA_WRITE_0; | |
208 | FPGA_WRITE_0; | |
209 | FPGA_WRITE_0; | |
210 | ||
211 | /* | |
212 | ** Bit_DeCompression | |
213 | ** Code 1 .. maxOnes : n '1's followed by '0' | |
214 | ** maxOnes + 1 .. maxOnes + 1 : n - 1 '1's no '0' | |
215 | ** maxOnes + 2 .. 254 : n - (maxOnes + 2) '0's followed by '1' | |
216 | ** 255 : '1' | |
217 | */ | |
218 | ||
219 | for (i = index; i < size; i++) { | |
220 | b = fpgadata[i]; | |
221 | if ((b >= 1) && (b <= MAX_ONES)) { | |
222 | for (bit = 0; bit < b; bit++) { | |
223 | FPGA_WRITE_1; | |
224 | } | |
225 | FPGA_WRITE_0; | |
226 | } else if (b == (MAX_ONES + 1)) { | |
227 | for (bit = 1; bit < b; bit++) { | |
228 | FPGA_WRITE_1; | |
229 | } | |
230 | } else if ((b >= (MAX_ONES + 2)) && (b <= 254)) { | |
231 | for (bit = 0; bit < (b - (MAX_ONES + 2)); bit++) { | |
232 | FPGA_WRITE_0; | |
233 | } | |
234 | FPGA_WRITE_1; | |
235 | } else if (b == 255) { | |
236 | FPGA_WRITE_1; | |
237 | } | |
238 | } | |
239 | #endif | |
240 | ||
241 | DBG ("%s, ", (FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE"); | |
242 | DBG ("%s\n", (FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT"); | |
243 | ||
244 | /* | |
245 | * Check if fpga's DONE signal - correctly booted ? | |
246 | */ | |
247 | ||
248 | /* Wait for FPGA end of programming period . */ | |
249 | count = 0; | |
250 | while (!(FPGA_DONE_STATE)) { | |
251 | udelay (1000); /* wait 1ms */ | |
252 | /* Check for timeout */ | |
253 | if (count++ > 3) { | |
254 | DBG ("FPGA: Booting failed!\n"); | |
255 | return ERROR_FPGA_PRG_DONE; | |
256 | } | |
257 | } | |
258 | ||
259 | DBG ("FPGA: Booting successful!\n"); | |
260 | return 0; | |
261 | } |