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- /* sd2snes - SD card based universal cartridge for the SNES
- Copyright (C) 2009-2010 Maximilian Rehkopf <otakon@gmx.net>
- AVR firmware portion
- Inspired by and based on code from sd2iec, written by Ingo Korb et al.
- See sdcard.c|h, config.h.
- FAT file system access based on code by ChaN, Jim Brain, Ingo Korb,
- see ff.c|h.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; version 2 of the License only.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- fpga.c: FPGA (re)configuration
- */
- /*
- FPGA pin mapping
- ================
- CCLK P0.11 out
- PROG_B P1.15 out
- INIT_B P2.9 in
- DIN P2.8 out
- DONE P0.22 in
- */
- #include <arm/NXP/LPC17xx/LPC17xx.h>
- #include "bits.h"
- #include "fpga.h"
- #include "fpga_spi.h"
- #include "config.h"
- #include "uart.h"
- #include "diskio.h"
- #include "integer.h"
- #include "ff.h"
- #include "fileops.h"
- #include "spi.h"
- #include "led.h"
- #include "timer.h"
- #include "rle.h"
- #include "cfgware.h"
- void fpga_set_prog_b( uint8_t val )
- {
- if ( val )
- {
- BITBAND( PROGBREG->FIOSET, PROGBBIT ) = 1;
- }
- else
- {
- BITBAND( PROGBREG->FIOCLR, PROGBBIT ) = 1;
- }
- }
- void fpga_set_cclk( uint8_t val )
- {
- if ( val )
- {
- BITBAND( CCLKREG->FIOSET, CCLKBIT ) = 1;
- }
- else
- {
- BITBAND( CCLKREG->FIOCLR, CCLKBIT ) = 1;
- }
- }
- int fpga_get_initb()
- {
- return BITBAND( INITBREG->FIOPIN, INITBBIT );
- }
- void fpga_init()
- {
- /* mainly GPIO directions */
- BITBAND( CCLKREG->FIODIR, CCLKBIT ) = 1; /* CCLK */
- BITBAND( DONEREG->FIODIR, DONEBIT ) = 0; /* DONE */
- BITBAND( PROGBREG->FIODIR, PROGBBIT ) = 1; /* PROG_B */
- BITBAND( DINREG->FIODIR, DINBIT ) = 1; /* DIN */
- BITBAND( INITBREG->FIODIR, INITBBIT ) = 0; /* INIT_B */
- LPC_GPIO2->FIOMASK1 = 0;
- SPI_OFFLOAD = 0;
- fpga_set_cclk( 0 ); /* initial clk=0 */
- }
- int fpga_get_done( void )
- {
- return BITBAND( DONEREG->FIOPIN, DONEBIT );
- }
- void fpga_postinit()
- {
- LPC_GPIO2->FIOMASK1 = 0;
- }
- void fpga_pgm( uint8_t *filename )
- {
- int MAXRETRIES = 10;
- int retries = MAXRETRIES;
- uint8_t data;
- int i;
- tick_t timeout;
- do
- {
- i = 0;
- timeout = getticks() + 100;
- fpga_set_prog_b( 0 );
- if ( BITBAND( PROGBREG->FIOPIN, PROGBBIT ) )
- {
- printf( "PROGB is stuck high!\n" );
- led_panic();
- }
- uart_putc( 'P' );
- fpga_set_prog_b( 1 );
- while ( !fpga_get_initb() )
- {
- if ( getticks() > timeout )
- {
- printf( "no response from FPGA trying to initiate configuration!\n" );
- led_panic();
- }
- };
- if ( fpga_get_done() )
- {
- printf( "DONE is stuck high!\n" );
- led_panic();
- }
- LPC_GPIO2->FIOMASK1 = ~( BV( 0 ) );
- uart_putc( 'p' );
- /* open configware file */
- file_open( filename, FA_READ );
- if ( file_res )
- {
- uart_putc( '?' );
- uart_putc( 0x30 + file_res );
- return;
- }
- uart_putc( 'C' );
- for ( ;; )
- {
- data = rle_file_getc();
- i++;
- if ( file_status || file_res )
- {
- break; /* error or eof */
- }
- FPGA_SEND_BYTE_SERIAL( data );
- }
- uart_putc( 'c' );
- file_close();
- printf( "fpga_pgm: %d bytes programmed\n", i );
- delay_ms( 1 );
- }
- while ( !fpga_get_done() && retries-- );
- if ( !fpga_get_done() )
- {
- printf( "FPGA failed to configure after %d tries.\n", MAXRETRIES );
- led_panic();
- }
- printf( "FPGA configured\n" );
- fpga_postinit();
- }
- void fpga_rompgm()
- {
- int MAXRETRIES = 10;
- int retries = MAXRETRIES;
- uint8_t data;
- int i;
- tick_t timeout;
- do
- {
- i = 0;
- timeout = getticks() + 100;
- fpga_set_prog_b( 0 );
- uart_putc( 'P' );
- fpga_set_prog_b( 1 );
- while ( !fpga_get_initb() )
- {
- if ( getticks() > timeout )
- {
- printf( "no response from FPGA trying to initiate configuration!\n" );
- led_panic();
- }
- };
- if ( fpga_get_done() )
- {
- printf( "DONE is stuck high!\n" );
- led_panic();
- }
- LPC_GPIO2->FIOMASK1 = ~( BV( 0 ) );
- uart_putc( 'p' );
- /* open configware file */
- rle_mem_init( cfgware, sizeof( cfgware ) );
- printf( "sizeof(cfgware) = %d\n", sizeof( cfgware ) );
- for ( ;; )
- {
- data = rle_mem_getc();
- if ( rle_state )
- {
- break;
- }
- i++;
- FPGA_SEND_BYTE_SERIAL( data );
- }
- uart_putc( 'c' );
- printf( "fpga_pgm: %d bytes programmed\n", i );
- delay_ms( 1 );
- }
- while ( !fpga_get_done() && retries-- );
- if ( !fpga_get_done() )
- {
- printf( "FPGA failed to configure after %d tries.\n", MAXRETRIES );
- led_panic();
- }
- printf( "FPGA configured\n" );
- fpga_postinit();
- }
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