/* * (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 #include #include #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; }