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/*
* (C) Copyright 2002-2013
* Eric Jarrige <eric.jarrige@armadeus.org>
*
* based on the files by
* Rich Ireland, Enterasys Networks, rireland@enterasys.com
* and
* Keith Outwater, keith_outwater@mvis.com
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/imx-regs.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <command.h>
#include <config.h>
#include "fpga.h"
#include <spartan3.h>
#include "apf27.h"
/*
* Note that these are pointers to code that is in Flash. They will be
* relocated at runtime.
* Spartan2 code is used to download our Spartan 3 :) code is compatible.
* Just take care about the file size
*/
xilinx_spartan3_slave_parallel_fns fpga_fns = {
fpga_pre_fn,
fpga_pgm_fn,
fpga_init_fn,
NULL,
fpga_done_fn,
fpga_clk_fn,
fpga_cs_fn,
fpga_wr_fn,
fpga_rdata_fn,
fpga_wdata_fn,
fpga_busy_fn,
fpga_abort_fn,
fpga_post_fn,
};
xilinx_desc fpga[CONFIG_FPGA_COUNT] = {
{xilinx_spartan3,
slave_parallel,
1196128l/8,
(void *)&fpga_fns,
0,
&spartan3_op,
"3s200aft256"}
};
/*
* Initialize GPIO port B before download
*/
int fpga_pre_fn(int cookie)
{
/* Initialize GPIO pins */
gpio_set_value(ACFG_FPGA_PWR, 1);
imx_gpio_mode(ACFG_FPGA_INIT | GPIO_IN | GPIO_PUEN | GPIO_GPIO);
imx_gpio_mode(ACFG_FPGA_DONE | GPIO_IN | GPIO_PUEN | GPIO_GPIO);
imx_gpio_mode(ACFG_FPGA_PRG | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
imx_gpio_mode(ACFG_FPGA_CLK | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
imx_gpio_mode(ACFG_FPGA_RW | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
imx_gpio_mode(ACFG_FPGA_CS | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
imx_gpio_mode(ACFG_FPGA_SUSPEND|GPIO_OUT|GPIO_PUEN|GPIO_GPIO);
gpio_set_value(ACFG_FPGA_RESET, 1);
imx_gpio_mode(ACFG_FPGA_RESET | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
imx_gpio_mode(ACFG_FPGA_PWR | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
gpio_set_value(ACFG_FPGA_PRG, 1);
gpio_set_value(ACFG_FPGA_CLK, 1);
gpio_set_value(ACFG_FPGA_RW, 1);
gpio_set_value(ACFG_FPGA_CS, 1);
gpio_set_value(ACFG_FPGA_SUSPEND, 0);
gpio_set_value(ACFG_FPGA_PWR, 0);
udelay(30000); /*wait until supply started*/
return cookie;
}
/*
* Set the FPGA's active-low program line to the specified level
*/
int fpga_pgm_fn(int assert, int flush, int cookie)
{
debug("%s:%d: FPGA PROGRAM %s", __func__, __LINE__,
assert ? "high" : "low");
gpio_set_value(ACFG_FPGA_PRG, !assert);
return assert;
}
/*
* Set the FPGA's active-high clock line to the specified level
*/
int fpga_clk_fn(int assert_clk, int flush, int cookie)
{
debug("%s:%d: FPGA CLOCK %s", __func__, __LINE__,
assert_clk ? "high" : "low");
gpio_set_value(ACFG_FPGA_CLK, !assert_clk);
return assert_clk;
}
/*
* Test the state of the active-low FPGA INIT line. Return 1 on INIT
* asserted (low).
*/
int fpga_init_fn(int cookie)
{
int value;
debug("%s:%d: INIT check... ", __func__, __LINE__);
value = gpio_get_value(ACFG_FPGA_INIT);
/* printf("init value read %x",value); */
#ifdef CONFIG_SYS_FPGA_IS_PROTO
return value;
#else
return !value;
#endif
}
/*
* Test the state of the active-high FPGA DONE pin
*/
int fpga_done_fn(int cookie)
{
debug("%s:%d: DONE check... %s", __func__, __LINE__,
gpio_get_value(ACFG_FPGA_DONE) ? "high" : "low");
return gpio_get_value(ACFG_FPGA_DONE) ? FPGA_SUCCESS : FPGA_FAIL;
}
/*
* Set the FPGA's wr line to the specified level
*/
int fpga_wr_fn(int assert_write, int flush, int cookie)
{
debug("%s:%d: FPGA RW... %s ", __func__, __LINE__,
assert_write ? "high" : "low");
gpio_set_value(ACFG_FPGA_RW, !assert_write);
return assert_write;
}
int fpga_cs_fn(int assert_cs, int flush, int cookie)
{
debug("%s:%d: FPGA CS %s ", __func__, __LINE__,
assert_cs ? "high" : "low");
gpio_set_value(ACFG_FPGA_CS, !assert_cs);
return assert_cs;
}
int fpga_rdata_fn(unsigned char *data, int cookie)
{
debug("%s:%d: FPGA READ DATA %02X ", __func__, __LINE__,
*((char *)ACFG_FPGA_RDATA));
*data = (unsigned char)
((*((unsigned short *)ACFG_FPGA_RDATA))&0x00FF);
return *data;
}
int fpga_wdata_fn(unsigned char data, int flush, int cookie)
{
debug("%s:%d: FPGA WRITE DATA %02X ", __func__, __LINE__,
data);
*((unsigned short *)ACFG_FPGA_WDATA) = data;
return data;
}
int fpga_abort_fn(int cookie)
{
return fpga_post_fn(cookie);
}
int fpga_busy_fn(int cookie)
{
return 1;
}
int fpga_post_fn(int cookie)
{
debug("%s:%d: FPGA POST ", __func__, __LINE__);
imx_gpio_mode(ACFG_FPGA_RW | GPIO_PF | GPIO_PUEN);
imx_gpio_mode(ACFG_FPGA_CS | GPIO_PF | GPIO_PUEN);
imx_gpio_mode(ACFG_FPGA_CLK | GPIO_PF | GPIO_PUEN);
gpio_set_value(ACFG_FPGA_PRG, 1);
gpio_set_value(ACFG_FPGA_RESET, 0);
imx_gpio_mode(ACFG_FPGA_RESET | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
return cookie;
}
void apf27_fpga_setup(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
struct system_control_regs *system =
(struct system_control_regs *)IMX_SYSTEM_CTL_BASE;
/* Configure FPGA CLKO */
writel(ACFG_CCSR_VAL, &pll->ccsr);
/* Configure strentgh for FPGA */
writel(ACFG_DSCR10_VAL, &system->dscr10);
writel(ACFG_DSCR3_VAL, &system->dscr3);
writel(ACFG_DSCR7_VAL, &system->dscr7);
writel(ACFG_DSCR2_VAL, &system->dscr2);
}
/*
* Initialize the fpga. Return 1 on success, 0 on failure.
*/
void APF27_init_fpga(void)
{
int i;
apf27_fpga_setup();
fpga_init();
for (i = 0; i < CONFIG_FPGA_COUNT; i++) {
debug("%s:%d: Adding fpga %d\n", __func__, __LINE__, i);
fpga_add(fpga_xilinx, &fpga[i]);
}
return;
}
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