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
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/processor.h>
29 /* ------------------------------------------------------------------------- */
32 #define DBG(x...) printf(x)
40 # define FPGA_PRG CFG_FPGA_PRG /* FPGA program pin (ppc output)*/
41 # define FPGA_CLK CFG_FPGA_CLK /* FPGA clk pin (ppc output) */
42 # define FPGA_DATA CFG_FPGA_DATA /* FPGA data pin (ppc output) */
43 # define FPGA_DONE CFG_FPGA_DONE /* FPGA done pin (ppc input) */
44 # define FPGA_INIT CFG_FPGA_INIT /* FPGA init pin (ppc input) */
46 # define FPGA_PRG 0x04000000 /* FPGA program pin (ppc output) */
47 # define FPGA_CLK 0x02000000 /* FPGA clk pin (ppc output) */
48 # define FPGA_DATA 0x01000000 /* FPGA data pin (ppc output) */
49 # define FPGA_DONE 0x00800000 /* FPGA done pin (ppc input) */
50 # define FPGA_INIT 0x00400000 /* FPGA init pin (ppc input) */
53 #define ERROR_FPGA_PRG_INIT_LOW -1 /* Timeout after PRG* asserted */
54 #define ERROR_FPGA_PRG_INIT_HIGH -2 /* Timeout after PRG* deasserted */
55 #define ERROR_FPGA_PRG_DONE -3 /* Timeout after programming */
58 # define SET_FPGA(data) out32(GPIO0_OR, data)
61 #ifdef FPGA_PROG_ACTIVE_HIGH
62 # define FPGA_PRG_LOW FPGA_PRG
63 # define FPGA_PRG_HIGH 0
65 # define FPGA_PRG_LOW 0
66 # define FPGA_PRG_HIGH FPGA_PRG
69 #define FPGA_CLK_LOW 0
70 #define FPGA_CLK_HIGH FPGA_CLK
72 #define FPGA_DATA_LOW 0
73 #define FPGA_DATA_HIGH FPGA_DATA
75 #define FPGA_WRITE_1 { \
76 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set clock to 0 */ \
77 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set data to 1 */ \
78 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set clock to 1 */ \
79 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH);} /* set data to 1 */
81 #define FPGA_WRITE_0 { \
82 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set clock to 0 */ \
83 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_LOW); /* set data to 0 */ \
84 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_LOW); /* set clock to 1 */ \
85 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH);} /* set data to 1 */
87 #ifndef FPGA_DONE_STATE
88 # define FPGA_DONE_STATE (in32(GPIO0_IR) & FPGA_DONE)
90 #ifndef FPGA_INIT_STATE
91 # define FPGA_INIT_STATE (in32(GPIO0_IR) & FPGA_INIT)
95 static int fpga_boot(const unsigned char *fpgadata, int size)
99 #ifdef CFG_FPGA_SPARTAN2
106 /* display infos on fpgaimage */
110 len = fpgadata[index];
111 DBG("FPGA: %s\n", &(fpgadata[index+1]));
115 #ifdef CFG_FPGA_SPARTAN2
116 /* search for preamble 0xFFFFFFFF */
119 if ((fpgadata[index] == 0xff) && (fpgadata[index+1] == 0xff) &&
120 (fpgadata[index+2] == 0xff) && (fpgadata[index+3] == 0xff))
121 break; /* preamble found */
126 /* search for preamble 0xFF2X */
127 for (index = 0; index < size-1 ; index++)
129 if ((fpgadata[index] == 0xff) && ((fpgadata[index+1] & 0xf0) == 0x30))
135 DBG("FPGA: configdata starts at position 0x%x\n",index);
136 DBG("FPGA: length of fpga-data %d\n", size-index);
139 * Setup port pins for fpga programming
142 out32(GPIO0_ODR, 0x00000000); /* no open drain pins */
143 out32(GPIO0_TCR, in32(GPIO0_TCR) | FPGA_PRG | FPGA_CLK | FPGA_DATA); /* setup for output */
145 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set pins to high */
147 DBG("%s, ",(FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE" );
148 DBG("%s\n",(FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT" );
151 * Init fpga by asserting and deasserting PROGRAM*
153 SET_FPGA(FPGA_PRG_LOW | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set prog active */
155 /* Wait for FPGA init line low */
157 while (FPGA_INIT_STATE)
159 udelay(1000); /* wait 1ms */
160 /* Check for timeout - 100us max, so use 3ms */
163 DBG("FPGA: Booting failed!\n");
164 return ERROR_FPGA_PRG_INIT_LOW;
168 DBG("%s, ",(FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE" );
169 DBG("%s\n",(FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT" );
171 /* deassert PROGRAM* */
172 SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set prog inactive */
174 /* Wait for FPGA end of init period . */
176 while (!(FPGA_INIT_STATE))
178 udelay(1000); /* wait 1ms */
179 /* Check for timeout */
182 DBG("FPGA: Booting failed!\n");
183 return ERROR_FPGA_PRG_INIT_HIGH;
187 DBG("%s, ",(FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE" );
188 DBG("%s\n",(FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT" );
190 DBG("write configuration data into fpga\n");
191 /* write configuration-data into fpga... */
193 #ifdef CFG_FPGA_SPARTAN2
195 * Load uncompressed image into fpga
197 for (i=index; i<size; i++)
201 if ((fpgadata[i] & 0x80) == 0x80)
214 FPGA_WRITE_1; FPGA_WRITE_1; FPGA_WRITE_1; FPGA_WRITE_1;
215 FPGA_WRITE_1; FPGA_WRITE_1; FPGA_WRITE_1; FPGA_WRITE_1;
216 FPGA_WRITE_0; FPGA_WRITE_0; FPGA_WRITE_1; FPGA_WRITE_0;
217 FPGA_WRITE_0; FPGA_WRITE_0; FPGA_WRITE_0; FPGA_WRITE_0;
221 ** Code 1 .. maxOnes : n '1's followed by '0'
222 ** maxOnes + 1 .. maxOnes + 1 : n - 1 '1's no '0'
223 ** maxOnes + 2 .. 254 : n - (maxOnes + 2) '0's followed by '1'
227 for (i=index; i<size; i++)
230 if ((b >= 1) && (b <= MAX_ONES))
232 for(bit=0; bit<b; bit++)
238 else if (b == (MAX_ONES+1))
240 for(bit=1; bit<b; bit++)
245 else if ((b >= (MAX_ONES+2)) && (b <= 254))
247 for(bit=0; bit<(b-(MAX_ONES+2)); bit++)
260 DBG("%s, ",(FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE" );
261 DBG("%s\n",(FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT" );
264 * Check if fpga's DONE signal - correctly booted ?
267 /* Wait for FPGA end of programming period . */
269 while (!(FPGA_DONE_STATE))
271 udelay(1000); /* wait 1ms */
272 /* Check for timeout */
275 DBG("FPGA: Booting failed!\n");
276 return ERROR_FPGA_PRG_DONE;
280 DBG("FPGA: Booting successful!\n");