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/*
* (C) Copyright 2001-2003
* Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com
* Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
*
* SPDX-License-Identifier: GPL-2.0+
*/
/* The DEBUG define must be before common to enable debugging */
#undef DEBUG
#include <common.h>
#include <asm/processor.h>
#include <command.h>
#include "fpga.h"
/* ------------------------------------------------------------------------- */
#define MAX_ONES 226
/* MPC850 port D */
#define PD(bit) (1 << (15 - (bit)))
# define FPGA_INIT PD(11) /* FPGA init pin (ppc input) */
# define FPGA_PRG PD(12) /* FPGA program pin (ppc output) */
# define FPGA_CLK PD(13) /* FPGA clk pin (ppc output) */
# define FPGA_DATA PD(14) /* FPGA data pin (ppc output) */
# define FPGA_DONE PD(15) /* FPGA done pin (ppc input) */
/* DDR 0 - input, 1 - output */
#define FPGA_INIT_PDDIR FPGA_PRG | FPGA_CLK | FPGA_DATA /* just set outputs */
#define SET_FPGA(data) immr->im_ioport.iop_pddat = (data)
#define GET_FPGA immr->im_ioport.iop_pddat
#define FPGA_WRITE_1 { \
SET_FPGA(FPGA_PRG | FPGA_DATA); /* set clock to 0 */ \
SET_FPGA(FPGA_PRG | FPGA_DATA); /* set data to 1 */ \
SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA); /* set clock to 1 */ \
SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA);} /* set data to 1 */
#define FPGA_WRITE_0 { \
SET_FPGA(FPGA_PRG | FPGA_DATA); /* set clock to 0 */ \
SET_FPGA(FPGA_PRG); /* set data to 0 */ \
SET_FPGA(FPGA_PRG | FPGA_CLK); /* set clock to 1 */ \
SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA);} /* set data to 1 */
int fpga_boot (unsigned char *fpgadata, int size)
{
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
int i, index, len;
int count;
#ifdef CONFIG_SYS_FPGA_SPARTAN2
int j;
unsigned char data;
#else
unsigned char b;
int bit;
#endif
debug ("fpga_boot: fpgadata = %p, size = %d\n", fpgadata, size);
/* display infos on fpgaimage */
printf ("FPGA:");
index = 15;
for (i = 0; i < 4; i++) {
len = fpgadata[index];
printf (" %s", &(fpgadata[index + 1]));
index += len + 3;
}
printf ("\n");
index = 0;
#ifdef CONFIG_SYS_FPGA_SPARTAN2
/* search for preamble 0xFFFFFFFF */
while (1) {
if ((fpgadata[index] == 0xff) && (fpgadata[index + 1] == 0xff)
&& (fpgadata[index + 2] == 0xff)
&& (fpgadata[index + 3] == 0xff))
break; /* preamble found */
else
index++;
}
#else
/* search for preamble 0xFF2X */
for (index = 0; index < size - 1; index++) {
if ((fpgadata[index] == 0xff)
&& ((fpgadata[index + 1] & 0xf0) == 0x30))
break;
}
index += 2;
#endif
debug ("FPGA: configdata starts at position 0x%x\n", index);
debug ("FPGA: length of fpga-data %d\n", size - index);
/*
* Setup port pins for fpga programming
*/
immr->im_ioport.iop_pddir = FPGA_INIT_PDDIR;
debug ("%s, ", ((GET_FPGA & FPGA_DONE) == 0) ? "NOT DONE" : "DONE");
debug ("%s\n", ((GET_FPGA & FPGA_INIT) == 0) ? "NOT INIT" : "INIT");
/*
* Init fpga by asserting and deasserting PROGRAM*
*/
SET_FPGA (FPGA_CLK | FPGA_DATA);
/* Wait for FPGA init line low */
count = 0;
while (GET_FPGA & FPGA_INIT) {
udelay (1000); /* wait 1ms */
/* Check for timeout - 100us max, so use 3ms */
if (count++ > 3) {
debug ("FPGA: Booting failed!\n");
return ERROR_FPGA_PRG_INIT_LOW;
}
}
debug ("%s, ", ((GET_FPGA & FPGA_DONE) == 0) ? "NOT DONE" : "DONE");
debug ("%s\n", ((GET_FPGA & FPGA_INIT) == 0) ? "NOT INIT" : "INIT");
/* deassert PROGRAM* */
SET_FPGA (FPGA_PRG | FPGA_CLK | FPGA_DATA);
/* Wait for FPGA end of init period . */
count = 0;
while (!(GET_FPGA & FPGA_INIT)) {
udelay (1000); /* wait 1ms */
/* Check for timeout */
if (count++ > 3) {
debug ("FPGA: Booting failed!\n");
return ERROR_FPGA_PRG_INIT_HIGH;
}
}
debug ("%s, ", ((GET_FPGA & FPGA_DONE) == 0) ? "NOT DONE" : "DONE");
debug ("%s\n", ((GET_FPGA & FPGA_INIT) == 0) ? "NOT INIT" : "INIT");
debug ("write configuration data into fpga\n");
/* write configuration-data into fpga... */
#ifdef CONFIG_SYS_FPGA_SPARTAN2
/*
* Load uncompressed image into fpga
*/
for (i = index; i < size; i++) {
#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
if ((i % 1024) == 0)
printf ("%6d out of %6d\r", i, size); /* let them know we are alive */
#endif
data = fpgadata[i];
for (j = 0; j < 8; j++) {
if ((data & 0x80) == 0x80) {
FPGA_WRITE_1;
} else {
FPGA_WRITE_0;
}
data <<= 1;
}
}
/* add some 0xff to the end of the file */
for (i = 0; i < 8; i++) {
data = 0xff;
for (j = 0; j < 8; j++) {
if ((data & 0x80) == 0x80) {
FPGA_WRITE_1;
} else {
FPGA_WRITE_0;
}
data <<= 1;
}
}
#else
/* send 0xff 0x20 */
FPGA_WRITE_1;
FPGA_WRITE_1;
FPGA_WRITE_1;
FPGA_WRITE_1;
FPGA_WRITE_1;
FPGA_WRITE_1;
FPGA_WRITE_1;
FPGA_WRITE_1;
FPGA_WRITE_0;
FPGA_WRITE_0;
FPGA_WRITE_1;
FPGA_WRITE_0;
FPGA_WRITE_0;
FPGA_WRITE_0;
FPGA_WRITE_0;
FPGA_WRITE_0;
/*
** Bit_DeCompression
** Code 1 .. maxOnes : n '1's followed by '0'
** maxOnes + 1 .. maxOnes + 1 : n - 1 '1's no '0'
** maxOnes + 2 .. 254 : n - (maxOnes + 2) '0's followed by '1'
** 255 : '1'
*/
for (i = index; i < size; i++) {
b = fpgadata[i];
if ((b >= 1) && (b <= MAX_ONES)) {
for (bit = 0; bit < b; bit++) {
FPGA_WRITE_1;
}
FPGA_WRITE_0;
} else if (b == (MAX_ONES + 1)) {
for (bit = 1; bit < b; bit++) {
FPGA_WRITE_1;
}
} else if ((b >= (MAX_ONES + 2)) && (b <= 254)) {
for (bit = 0; bit < (b - (MAX_ONES + 2)); bit++) {
FPGA_WRITE_0;
}
FPGA_WRITE_1;
} else if (b == 255) {
FPGA_WRITE_1;
}
}
#endif
debug ("\n\n");
debug ("%s, ", ((GET_FPGA & FPGA_DONE) == 0) ? "NOT DONE" : "DONE");
debug ("%s\n", ((GET_FPGA & FPGA_INIT) == 0) ? "NOT INIT" : "INIT");
/*
* Check if fpga's DONE signal - correctly booted ?
*/
/* Wait for FPGA end of programming period . */
count = 0;
while (!(GET_FPGA & FPGA_DONE)) {
udelay (1000); /* wait 1ms */
/* Check for timeout */
if (count++ > 3) {
debug ("FPGA: Booting failed!\n");
return ERROR_FPGA_PRG_DONE;
}
}
debug ("FPGA: Booting successful!\n");
return 0;
}
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