88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/*
|
|
* 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 <john@phrozen.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 * const 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(ILL_INT_STATUS, 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);
|