1/*
 2 * Copyright Altera Corporation (C) 2016. All rights reserved.
 3 *
 4 * This program is free software; you can redistribute it and/or modify it
 5 * under the terms and conditions of the GNU General Public License,
 6 * version 2, as published by the Free Software Foundation.
 7 *
 8 * This program is distributed in the hope it will be useful, but WITHOUT
 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program.  If not, see <http://www.gnu.org/licenses/>.
15 */
16#include <linux/io.h>
17#include <linux/genalloc.h>
18#include <linux/module.h>
19#include <linux/of_address.h>
20#include <linux/of_platform.h>
21
22#define ALTR_OCRAM_CLEAR_ECC          0x00000018
23#define ALTR_OCRAM_ECC_EN             0x00000019
24
25void socfpga_init_ocram_ecc(void)
26{
27	struct device_node *np;
28	void __iomem *mapped_ocr_edac_addr;
29
30	/* Find the OCRAM EDAC device tree node */
31	np = of_find_compatible_node(NULL, NULL, "altr,socfpga-ocram-ecc");
32	if (!np) {
33		pr_err("Unable to find socfpga-ocram-ecc\n");
34		return;
35	}
36
37	mapped_ocr_edac_addr = of_iomap(np, 0);
38	of_node_put(np);
39	if (!mapped_ocr_edac_addr) {
40		pr_err("Unable to map OCRAM ecc regs.\n");
41		return;
42	}
43
44	/* Clear any pending OCRAM ECC interrupts, then enable ECC */
45	writel(ALTR_OCRAM_CLEAR_ECC, mapped_ocr_edac_addr);
46	writel(ALTR_OCRAM_ECC_EN, mapped_ocr_edac_addr);
47
48	iounmap(mapped_ocr_edac_addr);
49}