fpga.c
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/*
* (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
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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,
};
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\n");
fpga_init();
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 *)CONFIG_SYS_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 *)CONFIG_SYS_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 *)CONFIG_SYS_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 *)CONFIG_SYS_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 *)CONFIG_SYS_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(const 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;
}