/* * (C) Copyright 2001-2004 * 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+ */ #include #include #include #include /* ------------------------------------------------------------------------- */ #ifdef FPGA_DEBUG #define DBG(x...) printf(x) #else #define DBG(x...) #endif /* DEBUG */ #define MAX_ONES 226 #ifdef CONFIG_SYS_FPGA_PRG # define FPGA_PRG CONFIG_SYS_FPGA_PRG /* FPGA program pin (ppc output) */ # define FPGA_CLK CONFIG_SYS_FPGA_CLK /* FPGA clk pin (ppc output) */ # define FPGA_DATA CONFIG_SYS_FPGA_DATA /* FPGA data pin (ppc output) */ # define FPGA_DONE CONFIG_SYS_FPGA_DONE /* FPGA done pin (ppc input) */ # define FPGA_INIT CONFIG_SYS_FPGA_INIT /* FPGA init pin (ppc input) */ #else # define FPGA_PRG 0x04000000 /* FPGA program pin (ppc output) */ # define FPGA_CLK 0x02000000 /* FPGA clk pin (ppc output) */ # define FPGA_DATA 0x01000000 /* FPGA data pin (ppc output) */ # define FPGA_DONE 0x00800000 /* FPGA done pin (ppc input) */ # define FPGA_INIT 0x00400000 /* FPGA init pin (ppc input) */ #endif #define ERROR_FPGA_PRG_INIT_LOW -1 /* Timeout after PRG* asserted */ #define ERROR_FPGA_PRG_INIT_HIGH -2 /* Timeout after PRG* deasserted */ #define ERROR_FPGA_PRG_DONE -3 /* Timeout after programming */ #ifndef SET_FPGA # define SET_FPGA(data) out_be32((void *)GPIO0_OR, data) #endif #ifdef FPGA_PROG_ACTIVE_HIGH # define FPGA_PRG_LOW FPGA_PRG # define FPGA_PRG_HIGH 0 #else # define FPGA_PRG_LOW 0 # define FPGA_PRG_HIGH FPGA_PRG #endif #define FPGA_CLK_LOW 0 #define FPGA_CLK_HIGH FPGA_CLK #define FPGA_DATA_LOW 0 #define FPGA_DATA_HIGH FPGA_DATA #define FPGA_WRITE_1 { \ SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set clock to 0 */ \ SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set data to 1 */ \ SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set clock to 1 */ \ SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH);} /* set data to 1 */ #define FPGA_WRITE_0 { \ SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_HIGH); /* set clock to 0 */ \ SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_LOW | FPGA_DATA_LOW); /* set data to 0 */ \ SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_LOW); /* set clock to 1 */ \ SET_FPGA(FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH);} /* set data to 1 */ #ifndef FPGA_DONE_STATE # define FPGA_DONE_STATE (in_be32((void *)GPIO0_IR) & FPGA_DONE) #endif #ifndef FPGA_INIT_STATE # define FPGA_INIT_STATE (in_be32((void *)GPIO0_IR) & FPGA_INIT) #endif static int fpga_boot (const unsigned char *fpgadata, int size) { int i, index, len; int count; unsigned char b; #ifdef CONFIG_SYS_FPGA_SPARTAN2 int j; #else int bit; #endif /* display infos on fpgaimage */ index = 15; for (i = 0; i < 4; i++) { len = fpgadata[index]; DBG ("FPGA: %s\n", &(fpgadata[index + 1])); index += len + 3; } #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 DBG ("FPGA: configdata starts at position 0x%x\n", index); DBG ("FPGA: length of fpga-data %d\n", size - index); /* * Setup port pins for fpga programming */ #ifndef CONFIG_M5249 out_be32 ((void *)GPIO0_ODR, 0x00000000); /* no open drain pins */ /* setup for output */ out_be32 ((void *)GPIO0_TCR, in_be32 ((void *)GPIO0_TCR) | FPGA_PRG | FPGA_CLK | FPGA_DATA); #endif SET_FPGA (FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set pins to high */ DBG ("%s, ", (FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE"); DBG ("%s\n", (FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT"); /* * Init fpga by asserting and deasserting PROGRAM* */ SET_FPGA (FPGA_PRG_LOW | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set prog active */ /* Wait for FPGA init line low */ count = 0; while (FPGA_INIT_STATE) { udelay (1000); /* wait 1ms */ /* Check for timeout - 100us max, so use 3ms */ if (count++ > 3) { DBG ("FPGA: Booting failed!\n"); return ERROR_FPGA_PRG_INIT_LOW; } } DBG ("%s, ", (FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE"); DBG ("%s\n", (FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT"); /* deassert PROGRAM* */ SET_FPGA (FPGA_PRG_HIGH | FPGA_CLK_HIGH | FPGA_DATA_HIGH); /* set prog inactive */ /* Wait for FPGA end of init period . */ count = 0; while (!(FPGA_INIT_STATE)) { udelay (1000); /* wait 1ms */ /* Check for timeout */ if (count++ > 3) { DBG ("FPGA: Booting failed!\n"); return ERROR_FPGA_PRG_INIT_HIGH; } } DBG ("%s, ", (FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE"); DBG ("%s\n", (FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT"); DBG ("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++) { b = fpgadata[i]; for (j = 0; j < 8; j++) { if ((b & 0x80) == 0x80) { FPGA_WRITE_1; } else { FPGA_WRITE_0; } b <<= 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 DBG ("%s, ", (FPGA_DONE_STATE == 0) ? "NOT DONE" : "DONE"); DBG ("%s\n", (FPGA_INIT_STATE == 0) ? "NOT INIT" : "INIT"); /* * Check if fpga's DONE signal - correctly booted ? */ /* Wait for FPGA end of programming period . */ count = 0; while (!(FPGA_DONE_STATE)) { udelay (1000); /* wait 1ms */ /* Check for timeout */ if (count++ > 3) { DBG ("FPGA: Booting failed!\n"); return ERROR_FPGA_PRG_DONE; } } DBG ("FPGA: Booting successful!\n"); return 0; }