/*
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* Copyright Altera Corporation (C) 2016. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/io.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include "core.h"
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/* A10 System Manager L2 ECC Control register */
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#define A10_MPU_CTRL_L2_ECC_OFST 0x0
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#define A10_MPU_CTRL_L2_ECC_EN BIT(0)
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/* A10 System Manager Global IRQ Mask register */
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#define A10_SYSMGR_ECC_INTMASK_CLR_OFST 0x98
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#define A10_SYSMGR_ECC_INTMASK_CLR_L2 BIT(0)
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/* A10 System Manager L2 ECC IRQ Clear register */
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#define A10_SYSMGR_MPU_CLEAR_L2_ECC_OFST 0xA8
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#define A10_SYSMGR_MPU_CLEAR_L2_ECC (BIT(31) | BIT(15))
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void socfpga_init_l2_ecc(void)
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{
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struct device_node *np;
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void __iomem *mapped_l2_edac_addr;
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np = of_find_compatible_node(NULL, NULL, "altr,socfpga-l2-ecc");
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if (!np) {
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pr_err("Unable to find socfpga-l2-ecc in dtb\n");
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return;
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}
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mapped_l2_edac_addr = of_iomap(np, 0);
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of_node_put(np);
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if (!mapped_l2_edac_addr) {
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pr_err("Unable to find L2 ECC mapping in dtb\n");
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return;
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}
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/* Enable ECC */
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writel(0x01, mapped_l2_edac_addr);
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iounmap(mapped_l2_edac_addr);
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}
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void socfpga_init_arria10_l2_ecc(void)
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{
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struct device_node *np;
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void __iomem *mapped_l2_edac_addr;
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/* Find the L2 EDAC device tree node */
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np = of_find_compatible_node(NULL, NULL, "altr,socfpga-a10-l2-ecc");
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if (!np) {
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pr_err("Unable to find socfpga-a10-l2-ecc in dtb\n");
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return;
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}
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mapped_l2_edac_addr = of_iomap(np, 0);
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of_node_put(np);
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if (!mapped_l2_edac_addr) {
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pr_err("Unable to find L2 ECC mapping in dtb\n");
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return;
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}
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if (!sys_manager_base_addr) {
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pr_err("System Manager not mapped for L2 ECC\n");
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goto exit;
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}
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/* Clear any pending IRQs */
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writel(A10_SYSMGR_MPU_CLEAR_L2_ECC, (sys_manager_base_addr +
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A10_SYSMGR_MPU_CLEAR_L2_ECC_OFST));
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/* Enable ECC */
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writel(A10_SYSMGR_ECC_INTMASK_CLR_L2, sys_manager_base_addr +
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A10_SYSMGR_ECC_INTMASK_CLR_OFST);
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writel(A10_MPU_CTRL_L2_ECC_EN, mapped_l2_edac_addr +
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A10_MPU_CTRL_L2_ECC_OFST);
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exit:
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iounmap(mapped_l2_edac_addr);
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}
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