diff options
Diffstat (limited to 'target/linux/ramips/patches-3.18/0005-MIPS-ralink-add-illegal-access-driver.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.18/0005-MIPS-ralink-add-illegal-access-driver.patch | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.18/0005-MIPS-ralink-add-illegal-access-driver.patch b/target/linux/ramips/patches-3.18/0005-MIPS-ralink-add-illegal-access-driver.patch new file mode 100644 index 0000000..fa9cd21 --- /dev/null +++ b/target/linux/ramips/patches-3.18/0005-MIPS-ralink-add-illegal-access-driver.patch @@ -0,0 +1,115 @@ +From 60999174904c731e55992a4087999bbd4e5f2051 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Thu, 16 May 2013 23:28:23 +0200 +Subject: [PATCH 05/57] MIPS: ralink: add illegal access driver + +these SoCs have a special irq that fires upon an illegal memmory access. + +Signed-off-by: John Crispin <blogic@openwrt.org> +--- + arch/mips/ralink/Makefile | 2 + + arch/mips/ralink/ill_acc.c | 87 ++++++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 89 insertions(+) + create mode 100644 arch/mips/ralink/ill_acc.c + +--- a/arch/mips/ralink/Makefile ++++ b/arch/mips/ralink/Makefile +@@ -10,6 +10,8 @@ obj-y := prom.o of.o reset.o clk.o irq.o + + obj-$(CONFIG_CLKEVT_RT3352) += cevt-rt3352.o + ++obj-$(CONFIG_RALINK_ILL_ACC) += ill_acc.o ++ + obj-$(CONFIG_SOC_RT288X) += rt288x.o + obj-$(CONFIG_SOC_RT305X) += rt305x.o + obj-$(CONFIG_SOC_RT3883) += rt3883.o +--- /dev/null ++++ b/arch/mips/ralink/ill_acc.c +@@ -0,0 +1,87 @@ ++/* ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published ++ * by the Free Software Foundation. ++ * ++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org> ++ */ ++ ++#include <linux/interrupt.h> ++#include <linux/of_platform.h> ++#include <linux/of_irq.h> ++ ++#include <asm/mach-ralink/ralink_regs.h> ++ ++#define REG_ILL_ACC_ADDR 0x10 ++#define REG_ILL_ACC_TYPE 0x14 ++ ++#define ILL_INT_STATUS BIT(31) ++#define ILL_ACC_WRITE BIT(30) ++#define ILL_ACC_LEN_M 0xff ++#define ILL_ACC_OFF_M 0xf ++#define ILL_ACC_OFF_S 16 ++#define ILL_ACC_ID_M 0x7 ++#define ILL_ACC_ID_S 8 ++ ++#define DRV_NAME "ill_acc" ++ ++static const char *ill_acc_ids[] = { ++ "cpu", "dma", "ppe", "pdma rx","pdma tx", "pci/e", "wmac", "usb", ++}; ++ ++static irqreturn_t ill_acc_irq_handler(int irq, void *_priv) ++{ ++ struct device *dev = (struct device *) _priv; ++ u32 addr = rt_memc_r32(REG_ILL_ACC_ADDR); ++ u32 type = rt_memc_r32(REG_ILL_ACC_TYPE); ++ ++ dev_err(dev, "illegal %s access from %s - addr:0x%08x offset:%d len:%d\n", ++ (type & ILL_ACC_WRITE) ? ("write") : ("read"), ++ ill_acc_ids[(type >> ILL_ACC_ID_S) & ILL_ACC_ID_M], ++ addr, (type >> ILL_ACC_OFF_S) & ILL_ACC_OFF_M, ++ type & ILL_ACC_LEN_M); ++ ++ rt_memc_w32(REG_ILL_ACC_TYPE, REG_ILL_ACC_TYPE); ++ ++ return IRQ_HANDLED; ++} ++ ++static int __init ill_acc_of_setup(void) ++{ ++ struct platform_device *pdev; ++ struct device_node *np; ++ int irq; ++ ++ /* somehow this driver breaks on RT5350 */ ++ if (of_machine_is_compatible("ralink,rt5350-soc")) ++ return -EINVAL; ++ ++ np = of_find_compatible_node(NULL, NULL, "ralink,rt3050-memc"); ++ if (!np) ++ return -EINVAL; ++ ++ pdev = of_find_device_by_node(np); ++ if (!pdev) { ++ pr_err("%s: failed to lookup pdev\n", np->name); ++ return -EINVAL; ++ } ++ ++ irq = irq_of_parse_and_map(np, 0); ++ if (!irq) { ++ dev_err(&pdev->dev, "failed to get irq\n"); ++ return -EINVAL; ++ } ++ ++ if (request_irq(irq, ill_acc_irq_handler, 0, "ill_acc", &pdev->dev)) { ++ dev_err(&pdev->dev, "failed to request irq\n"); ++ return -EINVAL; ++ } ++ ++ rt_memc_w32(ILL_INT_STATUS, REG_ILL_ACC_TYPE); ++ ++ dev_info(&pdev->dev, "irq registered\n"); ++ ++ return 0; ++} ++ ++arch_initcall(ill_acc_of_setup); |