| Thor Thayer | 7cc5a5d | 2016-02-10 13:26:24 -0600 | [diff] [blame^] | 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 | |
| 25 | void 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 | } |