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/*
* (C) Copyright 2002
* Rich Ireland, Enterasys Networks, rireland@enterasys.com.
* Keith Outwater, keith_outwater@mvis.com.
*
* (C) Copyright 2011
* 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 "mergerbox.h"
#include "fpga.h"
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,
};
Altera_desc cyclone2 = {
Altera_CYC2,
passive_serial,
Altera_EP2C20_SIZE,
(void *) &altera_fns,
NULL,
0
};
DECLARE_GLOBAL_DATA_PTR;
int mergerbox_init_fpga(void)
{
debug("Initialize FPGA interface\n");
fpga_init();
fpga_add(fpga_altera, &cyclone2);
return 1;
}
int fpga_null_fn(int cookie)
{
return 0;
}
int fpga_config_fn(int assert, int flush, int cookie)
{
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
volatile gpio83xx_t *gpio = (gpio83xx_t *)&im->gpio[0];
u32 dvo = gpio->dat;
dvo &= ~FPGA_CONFIG;
gpio->dat = dvo;
udelay(5);
dvo |= FPGA_CONFIG;
gpio->dat = dvo;
return assert;
}
int fpga_done_fn(int cookie)
{
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
volatile gpio83xx_t *gpio = (gpio83xx_t *)&im->gpio[0];
int result = 0;
udelay(10);
debug("CONF_DONE check ... ");
if (gpio->dat & FPGA_CONF_DONE) {
debug("high\n");
result = 1;
} else
debug("low\n");
return result;
}
int fpga_status_fn(int cookie)
{
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
volatile gpio83xx_t *gpio = (gpio83xx_t *)&im->gpio[0];
int result = 0;
debug("STATUS check ... ");
if (gpio->dat & FPGA_STATUS) {
debug("high\n");
result = 1;
} else
debug("low\n");
return result;
}
int fpga_clk_fn(int assert_clk, int flush, int cookie)
{
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
volatile gpio83xx_t *gpio = (gpio83xx_t *)&im->gpio[0];
u32 dvo = gpio->dat;
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 = (immap_t *)CONFIG_SYS_IMMR;
volatile gpio83xx_t *gpio = (gpio83xx_t *)&im->gpio[0];
int i;
u32 dvo = gpio->dat;
if (dump)
debug(" %02x -> ", val);
for (i = 0; i < 8; i++) {
dvo &= ~FPGA_CCLK;
gpio->dat = dvo;
dvo &= ~FPGA_DIN;
if (dump)
debug("%d ", val&1);
if (val & 1)
dvo |= FPGA_DIN;
gpio->dat = dvo;
dvo |= FPGA_CCLK;
gpio->dat = dvo;
val >>= 1;
}
if (dump)
debug("\n");
return 0;
}
int fpga_wr_fn(const void *buf, size_t len, int flush, int cookie)
{
unsigned char *data = (unsigned char *) buf;
int i;
debug("fpga_wr: buf %p / size %d\n", buf, len);
for (i = 0; i < len; i++)
_write_fpga(data[i], 0);
debug("\n");
return FPGA_SUCCESS;
}
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