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https://github.com/AsahiLinux/u-boot
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446 lines
8.8 KiB
C
446 lines
8.8 KiB
C
/*
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* (C) Copyright 2007
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* Matthias Fuchs, esd gmbh, matthias.fuchs@esd-electronics.com.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <spartan2.h>
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#include <spartan3.h>
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#include <command.h>
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#include "fpga.h"
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#include "pmc440.h"
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DECLARE_GLOBAL_DATA_PTR;
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#if defined(CONFIG_FPGA)
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#define USE_SP_CODE
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#ifdef USE_SP_CODE
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xilinx_spartan3_slave_parallel_fns pmc440_fpga_fns = {
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fpga_pre_config_fn,
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fpga_pgm_fn,
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fpga_init_fn,
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NULL, /* err */
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fpga_done_fn,
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fpga_clk_fn,
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fpga_cs_fn,
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fpga_wr_fn,
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NULL, /* rdata */
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fpga_wdata_fn,
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fpga_busy_fn,
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fpga_abort_fn,
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fpga_post_config_fn,
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};
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#else
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xilinx_spartan3_slave_serial_fns pmc440_fpga_fns = {
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fpga_pre_config_fn,
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fpga_pgm_fn,
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fpga_clk_fn,
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fpga_init_fn,
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fpga_done_fn,
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fpga_wr_fn,
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fpga_post_config_fn,
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};
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#endif
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xilinx_spartan2_slave_serial_fns ngcc_fpga_fns = {
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ngcc_fpga_pre_config_fn,
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ngcc_fpga_pgm_fn,
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ngcc_fpga_clk_fn,
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ngcc_fpga_init_fn,
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ngcc_fpga_done_fn,
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ngcc_fpga_wr_fn,
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ngcc_fpga_post_config_fn
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};
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xilinx_desc fpga[CONFIG_FPGA_COUNT] = {
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XILINX_XC3S1200E_DESC(
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#ifdef USE_SP_CODE
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slave_parallel,
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#else
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slave_serial,
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#endif
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(void *)&pmc440_fpga_fns,
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0),
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XILINX_XC2S200_DESC(
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slave_serial,
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(void *)&ngcc_fpga_fns,
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0)
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};
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/*
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* Set the active-low FPGA reset signal.
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*/
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void fpga_reset(int assert)
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{
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debug("%s:%d: RESET ", __FUNCTION__, __LINE__);
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if (assert) {
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_FPGA_DATA);
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debug("asserted\n");
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} else {
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_FPGA_DATA);
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debug("deasserted\n");
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}
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}
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/*
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* Initialize the SelectMap interface. We assume that the mode and the
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* initial state of all of the port pins have already been set!
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*/
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void fpga_serialslave_init(void)
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{
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debug("%s:%d: Initialize serial slave interface\n", __FUNCTION__,
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__LINE__);
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fpga_pgm_fn(false, false, 0); /* make sure program pin is inactive */
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}
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/*
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* Set the FPGA's active-low SelectMap program line to the specified level
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*/
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int fpga_pgm_fn(int assert, int flush, int cookie)
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{
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debug("%s:%d: FPGA PROGRAM ",
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__FUNCTION__, __LINE__);
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if (assert) {
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_FPGA_PRG);
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debug("asserted\n");
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} else {
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_FPGA_PRG);
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debug("deasserted\n");
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}
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return assert;
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}
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/*
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* Test the state of the active-low FPGA INIT line. Return 1 on INIT
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* asserted (low).
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*/
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int fpga_init_fn(int cookie)
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{
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if (in_be32((void*)GPIO1_IR) & GPIO1_FPGA_INIT)
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return 0;
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else
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return 1;
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}
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#ifdef USE_SP_CODE
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int fpga_abort_fn(int cookie)
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{
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return 0;
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}
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int fpga_cs_fn(int assert_cs, int flush, int cookie)
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{
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return assert_cs;
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}
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int fpga_busy_fn(int cookie)
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{
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return 1;
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}
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#endif
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/*
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* Test the state of the active-high FPGA DONE pin
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*/
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int fpga_done_fn(int cookie)
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{
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if (in_be32((void*)GPIO1_IR) & GPIO1_FPGA_DONE)
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return 1;
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else
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return 0;
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}
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/*
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* FPGA pre-configuration function. Just make sure that
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* FPGA reset is asserted to keep the FPGA from starting up after
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* configuration.
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*/
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int fpga_pre_config_fn(int cookie)
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{
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debug("%s:%d: FPGA pre-configuration\n", __FUNCTION__, __LINE__);
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fpga_reset(true);
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/* release init# */
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out_be32((void*)GPIO0_OR, in_be32((void*)GPIO0_OR) | GPIO0_FPGA_FORCEINIT);
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/* disable PLD IOs */
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_IOEN_N);
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return 0;
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}
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/*
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* FPGA post configuration function. Blip the FPGA reset line and then see if
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* the FPGA appears to be running.
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*/
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int fpga_post_config_fn(int cookie)
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{
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pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
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int rc=0;
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char *s;
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debug("%s:%d: FPGA post configuration\n", __FUNCTION__, __LINE__);
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/* enable PLD0..7 pins */
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_IOEN_N);
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fpga_reset(true);
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udelay (100);
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fpga_reset(false);
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udelay (100);
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FPGA_OUT32(&fpga->status, (gd->board_type << STATUS_HWREV_SHIFT) & STATUS_HWREV_MASK);
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/* NGCC/CANDES only: enable ledlink */
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if ((s = getenv("bd_type")) &&
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((!strcmp(s, "ngcc")) || (!strcmp(s, "candes"))))
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FPGA_SETBITS(&fpga->ctrla, 0x29f8c000);
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return rc;
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}
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int fpga_clk_fn(int assert_clk, int flush, int cookie)
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{
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if (assert_clk)
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_FPGA_CLK);
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else
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_FPGA_CLK);
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return assert_clk;
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}
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int fpga_wr_fn(int assert_write, int flush, int cookie)
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{
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if (assert_write)
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_FPGA_DATA);
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else
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out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_FPGA_DATA);
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return assert_write;
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}
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#ifdef USE_SP_CODE
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int fpga_wdata_fn(uchar data, int flush, int cookie)
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{
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uchar val = data;
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ulong or = in_be32((void*)GPIO1_OR);
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int i = 7;
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do {
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/* Write data */
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if (val & 0x80)
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or = (or & ~GPIO1_FPGA_CLK) | GPIO1_FPGA_DATA;
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else
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or = or & ~(GPIO1_FPGA_CLK | GPIO1_FPGA_DATA);
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out_be32((void*)GPIO1_OR, or);
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/* Assert the clock */
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or |= GPIO1_FPGA_CLK;
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out_be32((void*)GPIO1_OR, or);
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val <<= 1;
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i --;
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} while (i > 0);
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/* Write last data bit (the 8th clock comes from the sp_load() code */
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if (val & 0x80)
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or = (or & ~GPIO1_FPGA_CLK) | GPIO1_FPGA_DATA;
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else
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or = or & ~(GPIO1_FPGA_CLK | GPIO1_FPGA_DATA);
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out_be32((void*)GPIO1_OR, or);
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return 0;
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}
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#endif
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#define NGCC_FPGA_PRG CLOCK_EN
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#define NGCC_FPGA_DATA RESET_OUT
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#define NGCC_FPGA_DONE CLOCK_IN
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#define NGCC_FPGA_INIT IRIGB_R_IN
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#define NGCC_FPGA_CLK CLOCK_OUT
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void ngcc_fpga_serialslave_init(void)
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{
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debug("%s:%d: Initialize serial slave interface\n",
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__FUNCTION__, __LINE__);
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/* make sure program pin is inactive */
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ngcc_fpga_pgm_fn(false, false, 0);
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}
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/*
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* Set the active-low FPGA reset signal.
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*/
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void ngcc_fpga_reset(int assert)
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{
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debug("%s:%d: RESET ", __FUNCTION__, __LINE__);
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if (assert) {
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FPGA_CLRBITS(NGCC_CTRL_BASE, NGCC_CTRL_FPGARST_N);
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debug("asserted\n");
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} else {
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FPGA_SETBITS(NGCC_CTRL_BASE, NGCC_CTRL_FPGARST_N);
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debug("deasserted\n");
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}
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}
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/*
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* Set the FPGA's active-low SelectMap program line to the specified level
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*/
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int ngcc_fpga_pgm_fn(int assert, int flush, int cookie)
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{
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pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
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debug("%s:%d: FPGA PROGRAM ", __FUNCTION__, __LINE__);
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if (assert) {
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FPGA_CLRBITS(&fpga->ctrla, NGCC_FPGA_PRG);
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debug("asserted\n");
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} else {
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FPGA_SETBITS(&fpga->ctrla, NGCC_FPGA_PRG);
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debug("deasserted\n");
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}
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return assert;
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}
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/*
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* Test the state of the active-low FPGA INIT line. Return 1 on INIT
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* asserted (low).
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*/
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int ngcc_fpga_init_fn(int cookie)
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{
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pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
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debug("%s:%d: INIT check... ", __FUNCTION__, __LINE__);
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if (FPGA_IN32(&fpga->status) & NGCC_FPGA_INIT) {
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debug("high\n");
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return 0;
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} else {
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debug("low\n");
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return 1;
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}
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}
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/*
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* Test the state of the active-high FPGA DONE pin
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*/
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int ngcc_fpga_done_fn(int cookie)
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{
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pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
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debug("%s:%d: DONE check... ", __FUNCTION__, __LINE__);
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if (FPGA_IN32(&fpga->status) & NGCC_FPGA_DONE) {
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debug("DONE high\n");
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return 1;
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} else {
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debug("low\n");
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return 0;
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}
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}
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/*
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* FPGA pre-configuration function.
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*/
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int ngcc_fpga_pre_config_fn(int cookie)
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{
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pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
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debug("%s:%d: FPGA pre-configuration\n", __FUNCTION__, __LINE__);
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ngcc_fpga_reset(true);
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FPGA_CLRBITS(&fpga->ctrla, 0xfffffe00);
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ngcc_fpga_reset(true);
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return 0;
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}
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/*
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* FPGA post configuration function. Blip the FPGA reset line and then see if
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* the FPGA appears to be running.
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*/
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int ngcc_fpga_post_config_fn(int cookie)
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{
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pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
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debug("%s:%d: NGCC FPGA post configuration\n", __FUNCTION__, __LINE__);
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udelay (100);
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ngcc_fpga_reset(false);
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FPGA_SETBITS(&fpga->ctrla, 0x29f8c000);
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return 0;
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}
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int ngcc_fpga_clk_fn(int assert_clk, int flush, int cookie)
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{
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pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
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if (assert_clk)
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FPGA_SETBITS(&fpga->ctrla, NGCC_FPGA_CLK);
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else
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FPGA_CLRBITS(&fpga->ctrla, NGCC_FPGA_CLK);
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return assert_clk;
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}
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int ngcc_fpga_wr_fn(int assert_write, int flush, int cookie)
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{
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pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
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if (assert_write)
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FPGA_SETBITS(&fpga->ctrla, NGCC_FPGA_DATA);
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else
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FPGA_CLRBITS(&fpga->ctrla, NGCC_FPGA_DATA);
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return assert_write;
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}
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/*
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* Initialize the fpga. Return 1 on success, 0 on failure.
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*/
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int pmc440_init_fpga(void)
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{
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char *s;
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debug("%s:%d: Initialize FPGA interface\n",
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__FUNCTION__, __LINE__);
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fpga_init();
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fpga_serialslave_init ();
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debug("%s:%d: Adding fpga 0\n", __FUNCTION__, __LINE__);
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fpga_add (fpga_xilinx, &fpga[0]);
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/* NGCC only */
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if ((s = getenv("bd_type")) && !strcmp(s, "ngcc")) {
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ngcc_fpga_serialslave_init ();
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debug("%s:%d: Adding fpga 1\n", __FUNCTION__, __LINE__);
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fpga_add (fpga_xilinx, &fpga[1]);
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}
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return 0;
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}
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#endif /* CONFIG_FPGA */
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