ppc4xx: Add FPGA support and BSP commands for PMC440 boards

This patch adds some BSP commands and FPGA booting support
for esd's PMC440 boards.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>

1 files changed, 461 insertions, 0 deletions

diff --git a/board/esd/pmc440/fpga.c b/board/esd/pmc440/fpga.c
new file mode 100644
index 0000000..a35f42b
--- /dev/null
+++ b/board/esd/pmc440/fpga.c
@@ -0,0 +1,461 @@
+/*
+ * (C) Copyright 2007
+ * Matthias Fuchs, esd gmbh, matthias.fuchs@esd-electronics.com.
+ *
+ * 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 <asm/io.h>
+#include <spartan2.h>
+#include <spartan3.h>
+#include <command.h>
+#include "fpga.h"
+#include "pmc440.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_FPGA)
+
+#define USE_SP_CODE
+
+#ifdef USE_SP_CODE
+Xilinx_Spartan3_Slave_Parallel_fns pmc440_fpga_fns = {
+	fpga_pre_config_fn,
+	fpga_pgm_fn,
+	fpga_init_fn,
+	NULL, /* err */
+	fpga_done_fn,
+	fpga_clk_fn,
+	fpga_cs_fn,
+	fpga_wr_fn,
+	NULL, /* rdata */
+	fpga_wdata_fn,
+	fpga_busy_fn,
+	fpga_abort_fn,
+	fpga_post_config_fn,
+};
+#else
+Xilinx_Spartan3_Slave_Serial_fns pmc440_fpga_fns = {
+	fpga_pre_config_fn,
+	fpga_pgm_fn,
+	fpga_clk_fn,
+	fpga_init_fn,
+	fpga_done_fn,
+	fpga_wr_fn,
+	fpga_post_config_fn,
+};
+#endif
+
+Xilinx_Spartan2_Slave_Serial_fns ngcc_fpga_fns = {
+	ngcc_fpga_pre_config_fn,
+	ngcc_fpga_pgm_fn,
+	ngcc_fpga_clk_fn,
+	ngcc_fpga_init_fn,
+	ngcc_fpga_done_fn,
+	ngcc_fpga_wr_fn,
+	ngcc_fpga_post_config_fn
+};
+
+Xilinx_desc fpga[CONFIG_FPGA_COUNT] = {
+	XILINX_XC3S1200E_DESC(
+#ifdef USE_SP_CODE
+		slave_parallel,
+#else
+		slave_serial,
+#endif
+		(void *)&pmc440_fpga_fns,
+		0),
+	XILINX_XC2S200_DESC(
+		slave_serial,
+		(void *)&ngcc_fpga_fns,
+		0)
+};
+
+
+/*
+ * Set the active-low FPGA reset signal.
+ */
+void fpga_reset(int assert)
+{
+	debug("%s:%d: RESET ", __FUNCTION__, __LINE__);
+	if (assert) {
+		out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_FPGA_DATA);
+		debug("asserted\n");
+	} else {
+		out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_FPGA_DATA);
+		debug("deasserted\n");
+	}
+}
+
+
+/*
+ * Initialize the SelectMap interface.  We assume that the mode and the
+ * initial state of all of the port pins have already been set!
+ */
+void fpga_serialslave_init(void)
+{
+	debug("%s:%d: Initialize serial slave interface\n", __FUNCTION__,
+	      __LINE__);
+	fpga_pgm_fn(FALSE, FALSE, 0);	/* make sure program pin is inactive */
+}
+
+
+/*
+ * Set the FPGA's active-low SelectMap program line to the specified level
+ */
+int fpga_pgm_fn(int assert, int flush, int cookie)
+{
+	debug("%s:%d: FPGA PROGRAM ",
+	      __FUNCTION__, __LINE__);
+
+	if (assert) {
+		out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_FPGA_PRG);
+		debug("asserted\n");
+	} else {
+		out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_FPGA_PRG);
+		debug("deasserted\n");
+	}
+	return assert;
+}
+
+
+/*
+ * Test the state of the active-low FPGA INIT line.  Return 1 on INIT
+ * asserted (low).
+ */
+int fpga_init_fn(int cookie)
+{
+	if (in_be32((void*)GPIO1_IR) & GPIO1_FPGA_INIT)
+		return 0;
+	else
+		return 1;
+}
+
+#ifdef USE_SP_CODE
+int fpga_abort_fn(int cookie)
+{
+	return 0;
+}
+
+
+int fpga_cs_fn(int assert_cs, int flush, int cookie)
+{
+	return assert_cs;
+}
+
+
+int fpga_busy_fn(int cookie)
+{
+	return 1;
+}
+#endif
+
+
+/*
+ * Test the state of the active-high FPGA DONE pin
+ */
+int fpga_done_fn(int cookie)
+{
+	if (in_be32((void*)GPIO1_IR) & GPIO1_FPGA_DONE)
+		return 1;
+	else
+		return 0;
+}
+
+
+/*
+ * FPGA pre-configuration function. Just make sure that
+ * FPGA reset is asserted to keep the FPGA from starting up after
+ * configuration.
+ */
+int fpga_pre_config_fn(int cookie)
+{
+	debug("%s:%d: FPGA pre-configuration\n", __FUNCTION__, __LINE__);
+	fpga_reset(TRUE);
+
+	/* release init# */
+	out_be32((void*)GPIO0_OR, in_be32((void*)GPIO0_OR) | GPIO0_FPGA_FORCEINIT);
+	/* disable PLD IOs */
+	out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_IOEN_N);
+	return 0;
+}
+
+
+/*
+ * FPGA post configuration function. Blip the FPGA reset line and then see if
+ * the FPGA appears to be running.
+ */
+int fpga_post_config_fn(int cookie)
+{
+	pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
+	int rc=0;
+	char *s;
+
+	debug("%s:%d: FPGA post configuration\n", __FUNCTION__, __LINE__);
+
+	/* enable PLD0..7 pins */
+	out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_IOEN_N);
+
+	fpga_reset(TRUE);
+	udelay (100);
+	fpga_reset(FALSE);
+	udelay (100);
+
+	FPGA_OUT32(&fpga->status, (gd->board_type << STATUS_HWREV_SHIFT) & STATUS_HWREV_MASK);
+
+	/* NGCC only: enable ledlink */
+	if ((s = getenv("bd_type")) && !strcmp(s, "ngcc"))
+		FPGA_SETBITS(&fpga->ctrla, 0x29f8c000);
+
+	return rc;
+}
+
+
+int fpga_clk_fn(int assert_clk, int flush, int cookie)
+{
+	if (assert_clk)
+		out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_FPGA_CLK);
+	else
+		out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_FPGA_CLK);
+
+	return assert_clk;
+}
+
+
+int fpga_wr_fn(int assert_write, int flush, int cookie)
+{
+	if (assert_write)
+		out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) | GPIO1_FPGA_DATA);
+	else
+		out_be32((void*)GPIO1_OR, in_be32((void*)GPIO1_OR) & ~GPIO1_FPGA_DATA);
+
+	return assert_write;
+}
+
+#ifdef USE_SP_CODE
+int fpga_wdata_fn(uchar data, int flush, int cookie)
+{
+	uchar val = data;
+	ulong or = in_be32((void*)GPIO1_OR);
+	int i = 7;
+	do {
+		/* Write data */
+		if (val & 0x80)
+			or = (or & ~GPIO1_FPGA_CLK) | GPIO1_FPGA_DATA;
+		else
+			or = or & ~(GPIO1_FPGA_CLK | GPIO1_FPGA_DATA);
+
+		out_be32((void*)GPIO1_OR, or);
+
+		/* Assert the clock */
+		or |= GPIO1_FPGA_CLK;
+		out_be32((void*)GPIO1_OR, or);
+		val <<= 1;
+		i --;
+	} while (i > 0);
+
+	/* Write last data bit (the 8th clock comes from the sp_load() code */
+	if (val & 0x80)
+		or = (or & ~GPIO1_FPGA_CLK) | GPIO1_FPGA_DATA;
+	else
+		or = or & ~(GPIO1_FPGA_CLK | GPIO1_FPGA_DATA);
+
+	out_be32((void*)GPIO1_OR, or);
+
+	return 0;
+}
+#endif
+
+#define NGCC_FPGA_PRG  CLOCK_EN
+#define NGCC_FPGA_DATA RESET_OUT
+#define NGCC_FPGA_DONE CLOCK_IN
+#define NGCC_FPGA_INIT IRIGB_R_IN
+#define NGCC_FPGA_CLK  CLOCK_OUT
+
+void ngcc_fpga_serialslave_init(void)
+{
+	debug("%s:%d: Initialize serial slave interface\n",
+	      __FUNCTION__, __LINE__);
+
+	/* make sure program pin is inactive */
+	ngcc_fpga_pgm_fn (FALSE, FALSE, 0);
+}
+
+/*
+ * Set the active-low FPGA reset signal.
+ */
+void ngcc_fpga_reset(int assert)
+{
+	debug("%s:%d: RESET ", __FUNCTION__, __LINE__);
+
+	if (assert) {
+		FPGA_CLRBITS(NGCC_CTRL_BASE, NGCC_CTRL_FPGARST_N);
+		debug("asserted\n");
+	} else {
+		FPGA_SETBITS(NGCC_CTRL_BASE, NGCC_CTRL_FPGARST_N);
+		debug("deasserted\n");
+	}
+}
+
+
+/*
+ * Set the FPGA's active-low SelectMap program line to the specified level
+ */
+int ngcc_fpga_pgm_fn(int assert, int flush, int cookie)
+{
+	pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
+
+	debug("%s:%d: FPGA PROGRAM ", __FUNCTION__, __LINE__);
+
+	if (assert) {
+		FPGA_CLRBITS(&fpga->ctrla, NGCC_FPGA_PRG);
+		debug("asserted\n");
+	} else {
+		FPGA_SETBITS(&fpga->ctrla, NGCC_FPGA_PRG);
+		debug("deasserted\n");
+	}
+
+	return assert;
+}
+
+
+/*
+ * Test the state of the active-low FPGA INIT line.  Return 1 on INIT
+ * asserted (low).
+ */
+int ngcc_fpga_init_fn(int cookie)
+{
+	pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
+
+	debug("%s:%d: INIT check... ", __FUNCTION__, __LINE__);
+	if (FPGA_IN32(&fpga->status) & NGCC_FPGA_INIT) {
+		debug("high\n");
+		return 0;
+	} else {
+		debug("low\n");
+		return 1;
+	}
+}
+
+
+/*
+ * Test the state of the active-high FPGA DONE pin
+ */
+int ngcc_fpga_done_fn(int cookie)
+{
+	pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
+
+	debug("%s:%d: DONE check... ", __FUNCTION__, __LINE__);
+	if (FPGA_IN32(&fpga->status) & NGCC_FPGA_DONE) {
+		debug("DONE high\n");
+		return 1;
+	} else {
+		debug("low\n");
+		return 0;
+	}
+}
+
+
+/*
+ * FPGA pre-configuration function.
+ */
+int ngcc_fpga_pre_config_fn(int cookie)
+{
+	pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
+	debug("%s:%d: FPGA pre-configuration\n", __FUNCTION__, __LINE__);
+
+	ngcc_fpga_reset(TRUE);
+	FPGA_CLRBITS(&fpga->ctrla, 0xfffffe00);
+
+	ngcc_fpga_reset(TRUE);
+	return 0;
+}
+
+
+/*
+ * FPGA post configuration function. Blip the FPGA reset line and then see if
+ * the FPGA appears to be running.
+ */
+int ngcc_fpga_post_config_fn(int cookie)
+{
+	pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
+
+	debug("%s:%d: NGCC FPGA post configuration\n", __FUNCTION__, __LINE__);
+
+	udelay (100);
+	ngcc_fpga_reset(FALSE);
+
+	FPGA_SETBITS(&fpga->ctrla, 0x29f8c000);
+
+	return 0;
+}
+
+
+int ngcc_fpga_clk_fn(int assert_clk, int flush, int cookie)
+{
+	pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
+
+	if (assert_clk)
+		FPGA_SETBITS(&fpga->ctrla, NGCC_FPGA_CLK);
+	else
+		FPGA_CLRBITS(&fpga->ctrla, NGCC_FPGA_CLK);
+
+	return assert_clk;
+}
+
+
+int ngcc_fpga_wr_fn(int assert_write, int flush, int cookie)
+{
+	pmc440_fpga_t *fpga = (pmc440_fpga_t *)FPGA_BA;
+
+	if (assert_write)
+		FPGA_SETBITS(&fpga->ctrla, NGCC_FPGA_DATA);
+	else
+		FPGA_CLRBITS(&fpga->ctrla, NGCC_FPGA_DATA);
+
+	return assert_write;
+}
+
+
+/*
+ * Initialize the fpga.  Return 1 on success, 0 on failure.
+ */
+int pmc440_init_fpga(void)
+{
+	char *s;
+
+	debug("%s:%d: Initialize FPGA interface (relocation offset = 0x%.8lx)\n",
+	      __FUNCTION__, __LINE__, gd->reloc_off);
+	fpga_init(gd->reloc_off);
+
+	fpga_serialslave_init ();
+	debug("%s:%d: Adding fpga 0\n", __FUNCTION__, __LINE__);
+	fpga_add (fpga_xilinx, &fpga[0]);
+
+	/* NGCC only */
+	if ((s = getenv("bd_type")) && !strcmp(s, "ngcc")) {
+		ngcc_fpga_serialslave_init ();
+		debug("%s:%d: Adding fpga 1\n", __FUNCTION__, __LINE__);
+		fpga_add (fpga_xilinx, &fpga[1]);
+	}
+
+	return 0;
+}
+#endif /* CONFIG_FPGA */