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Diffstat (limited to 'board/mvblm7/fpga.c')
| -rw-r--r-- | board/mvblm7/fpga.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/board/mvblm7/fpga.c b/board/mvblm7/fpga.c new file mode 100644 index 0000000..a60af01 --- /dev/null +++ b/board/mvblm7/fpga.c @@ -0,0 +1,188 @@ +/* + * (C) Copyright 2002 + * Rich Ireland, Enterasys Networks, rireland@enterasys.com. + * Keith Outwater, keith_outwater@mvis.com. + * + * (C) Copyright 2008 + * Andre Schwarz, Matrix Vision GmbH, andre.schwarz@matrix-vision.de + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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; either version 2 of + * the License, or (at your option) any later version. + * + * 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 + * + */ + +#include <common.h> +#include <ACEX1K.h> +#include <command.h> +#include "fpga.h" +#include "mvblm7.h" + +#ifdef FPGA_DEBUG +#define fpga_debug(fmt, args...) printf("%s: "fmt, __func__, ##args) +#else +#define fpga_debug(fmt, args...) +#endif + +Altera_CYC2_Passive_Serial_fns altera_fns = { + fpga_null_fn, + fpga_config_fn, + fpga_status_fn, + fpga_done_fn, + fpga_wr_fn, + fpga_null_fn, + fpga_null_fn, + 0 +}; + +Altera_desc cyclone2 = { + Altera_CYC2, + passive_serial, + Altera_EP2C20_SIZE, + (void *) &altera_fns, + NULL, + 0 +}; + +DECLARE_GLOBAL_DATA_PTR; + +int mvblm7_init_fpga(void) +{ + fpga_debug("Initialize FPGA interface (reloc 0x%.8lx)\n", + gd->reloc_off); + fpga_init(gd->reloc_off); + fpga_add(fpga_altera, &cyclone2); + fpga_config_fn(0, 1, 0); + udelay(60); + + return 1; +} + +int fpga_null_fn(int cookie) +{ + return 0; +} + +int fpga_config_fn(int assert, int flush, int cookie) +{ + volatile immap_t *im = (volatile immap_t *)CFG_IMMR; + volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0]; + u32 dvo = gpio->dat; + + fpga_debug("SET config : %s\n", assert ? "low" : "high"); + if (assert) + dvo |= FPGA_CONFIG; + else + dvo &= ~FPGA_CONFIG; + + if (flush) + gpio->dat = dvo; + + return assert; +} + +int fpga_done_fn(int cookie) +{ + volatile immap_t *im = (volatile immap_t *)CFG_IMMR; + volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0]; + int result = 0; + + udelay(10); + fpga_debug("CONF_DONE check ... "); + if (gpio->dat & FPGA_CONF_DONE) { + fpga_debug("high\n"); + result = 1; + } else + fpga_debug("low\n"); + + return result; +} + +int fpga_status_fn(int cookie) +{ + volatile immap_t *im = (volatile immap_t *)CFG_IMMR; + volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0]; + int result = 0; + + fpga_debug("STATUS check ... "); + if (gpio->dat & FPGA_STATUS) { + fpga_debug("high\n"); + result = 1; + } else + fpga_debug("low\n"); + + return result; +} + +int fpga_clk_fn(int assert_clk, int flush, int cookie) +{ + volatile immap_t *im = (volatile immap_t *)CFG_IMMR; + volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0]; + u32 dvo = gpio->dat; + + fpga_debug("CLOCK %s\n", assert_clk ? "high" : "low"); + if (assert_clk) + dvo |= FPGA_CCLK; + else + dvo &= ~FPGA_CCLK; + + if (flush) + gpio->dat = dvo; + + return assert_clk; +} + +static inline int _write_fpga(u8 val, int dump) +{ + volatile immap_t *im = (volatile immap_t *)CFG_IMMR; + volatile gpio83xx_t *gpio = (volatile gpio83xx_t *)&im->gpio[0]; + int i; + u32 dvo = gpio->dat; + + if (dump) + fpga_debug(" %02x -> ", val); + for (i = 0; i < 8; i++) { + dvo &= ~FPGA_CCLK; + gpio->dat = dvo; + dvo &= ~FPGA_DIN; + if (dump) + fpga_debug("%d ", val&1); + if (val & 1) + dvo |= FPGA_DIN; + gpio->dat = dvo; + dvo |= FPGA_CCLK; + gpio->dat = dvo; + val >>= 1; + } + if (dump) + fpga_debug("\n"); + + return 0; +} + +int fpga_wr_fn(void *buf, size_t len, int flush, int cookie) +{ + unsigned char *data = (unsigned char *) buf; + int i; + + fpga_debug("fpga_wr: buf %p / size %d\n", buf, len); + for (i = 0; i < len; i++) + _write_fpga(data[i], 0); + fpga_debug("\n"); + + return FPGA_SUCCESS; +} |