2011-03-07 23:23:10 +08:00
|
|
|
/*
|
2014-04-12 02:09:36 +08:00
|
|
|
* OMAP L3 Interconnect error handling driver
|
2011-08-24 22:37:45 +08:00
|
|
|
*
|
2014-04-12 02:15:43 +08:00
|
|
|
* Copyright (C) 2011-2014 Texas Instruments Incorporated - http://www.ti.com/
|
2011-08-24 22:37:45 +08:00
|
|
|
* Santosh Shilimkar <santosh.shilimkar@ti.com>
|
|
|
|
* Sricharan <r.sricharan@ti.com>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
2014-04-12 02:15:43 +08:00
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
2011-08-24 22:37:45 +08:00
|
|
|
*
|
2014-04-12 02:15:43 +08:00
|
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
|
|
* kind, whether express or implied; without even the implied warranty
|
|
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
2011-08-24 22:37:45 +08:00
|
|
|
* GNU General Public License for more details.
|
|
|
|
*/
|
2011-11-02 09:40:11 +08:00
|
|
|
#include <linux/module.h>
|
2011-03-07 23:23:10 +08:00
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/io.h>
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
|
|
|
|
#include "omap_l3_noc.h"
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Interrupt Handler for L3 error detection.
|
|
|
|
* 1) Identify the L3 clockdomain partition to which the error belongs to.
|
|
|
|
* 2) Identify the slave where the error information is logged
|
|
|
|
* 3) Print the logged information.
|
|
|
|
* 4) Add dump stack to provide kernel trace.
|
|
|
|
*
|
|
|
|
* Two Types of errors :
|
|
|
|
* 1) Custom errors in L3 :
|
|
|
|
* Target like DMM/FW/EMIF generates SRESP=ERR error
|
|
|
|
* 2) Standard L3 error:
|
|
|
|
* - Unsupported CMD.
|
|
|
|
* L3 tries to access target while it is idle
|
|
|
|
* - OCP disconnect.
|
|
|
|
* - Address hole error:
|
|
|
|
* If DSS/ISS/FDIF/USBHOSTFS access a target where they
|
|
|
|
* do not have connectivity, the error is logged in
|
|
|
|
* their default target which is DMM2.
|
|
|
|
*
|
|
|
|
* On High Secure devices, firewall errors are possible and those
|
|
|
|
* can be trapped as well. But the trapping is implemented as part
|
|
|
|
* secure software and hence need not be implemented here.
|
|
|
|
*/
|
|
|
|
static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
|
|
|
|
{
|
|
|
|
|
2014-04-12 02:09:36 +08:00
|
|
|
struct omap_l3 *l3 = _l3;
|
2011-09-07 19:55:16 +08:00
|
|
|
int inttype, i, k;
|
2011-03-07 23:23:10 +08:00
|
|
|
int err_src = 0;
|
2011-09-07 19:55:16 +08:00
|
|
|
u32 std_err_main, err_reg, clear, masterid;
|
2011-08-23 15:28:48 +08:00
|
|
|
void __iomem *base, *l3_targ_base;
|
2014-04-12 00:21:47 +08:00
|
|
|
void __iomem *l3_targ_stderr, *l3_targ_slvofslsb, *l3_targ_mstaddr;
|
2011-09-07 19:55:16 +08:00
|
|
|
char *target_name, *master_name = "UN IDENTIFIED";
|
2014-04-12 00:38:10 +08:00
|
|
|
struct l3_target_data *l3_targ_inst;
|
2011-03-07 23:23:10 +08:00
|
|
|
|
|
|
|
/* Get the Type of interrupt */
|
2011-04-19 00:39:42 +08:00
|
|
|
inttype = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
|
2011-03-07 23:23:10 +08:00
|
|
|
|
|
|
|
for (i = 0; i < L3_MODULES; i++) {
|
|
|
|
/*
|
|
|
|
* Read the regerr register of the clock domain
|
|
|
|
* to determine the source
|
|
|
|
*/
|
2011-08-23 15:28:48 +08:00
|
|
|
base = l3->l3_base[i];
|
2014-04-12 00:21:47 +08:00
|
|
|
err_reg = readl_relaxed(base + l3_flagmux[i] +
|
|
|
|
L3_FLAGMUX_REGERR0 + (inttype << 3));
|
2011-03-07 23:23:10 +08:00
|
|
|
|
|
|
|
/* Get the corresponding error and analyse */
|
|
|
|
if (err_reg) {
|
|
|
|
/* Identify the source from control status register */
|
2011-08-24 21:41:39 +08:00
|
|
|
err_src = __ffs(err_reg);
|
2014-04-12 00:38:10 +08:00
|
|
|
l3_targ_inst = &l3_targ[i][err_src];
|
|
|
|
target_name = l3_targ_inst->name;
|
|
|
|
l3_targ_base = base + l3_targ_inst->offset;
|
2011-03-07 23:23:10 +08:00
|
|
|
|
|
|
|
/* Read the stderrlog_main_source from clk domain */
|
2014-04-12 00:21:47 +08:00
|
|
|
l3_targ_stderr = l3_targ_base + L3_TARG_STDERRLOG_MAIN;
|
|
|
|
l3_targ_slvofslsb = l3_targ_base +
|
|
|
|
L3_TARG_STDERRLOG_SLVOFSLSB;
|
|
|
|
l3_targ_mstaddr = l3_targ_base +
|
|
|
|
L3_TARG_STDERRLOG_MSTADDR;
|
|
|
|
|
|
|
|
std_err_main = readl_relaxed(l3_targ_stderr);
|
|
|
|
masterid = readl_relaxed(l3_targ_mstaddr);
|
2011-03-07 23:23:10 +08:00
|
|
|
|
2011-04-19 00:39:42 +08:00
|
|
|
switch (std_err_main & CUSTOM_ERROR) {
|
2011-03-07 23:23:10 +08:00
|
|
|
case STANDARD_ERROR:
|
2011-09-07 19:55:16 +08:00
|
|
|
WARN(true, "L3 standard error: TARGET:%s at address 0x%x\n",
|
|
|
|
target_name,
|
2014-04-12 00:21:47 +08:00
|
|
|
readl_relaxed(l3_targ_slvofslsb));
|
2011-03-07 23:23:10 +08:00
|
|
|
/* clear the std error log*/
|
|
|
|
clear = std_err_main | CLEAR_STDERR_LOG;
|
2014-04-12 00:21:47 +08:00
|
|
|
writel_relaxed(clear, l3_targ_stderr);
|
2011-03-07 23:23:10 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
case CUSTOM_ERROR:
|
2011-09-07 19:55:16 +08:00
|
|
|
for (k = 0; k < NUM_OF_L3_MASTERS; k++) {
|
|
|
|
if (masterid == l3_masters[k].id)
|
|
|
|
master_name =
|
|
|
|
l3_masters[k].name;
|
|
|
|
}
|
|
|
|
WARN(true, "L3 custom error: MASTER:%s TARGET:%s\n",
|
|
|
|
master_name, target_name);
|
2011-03-07 23:23:10 +08:00
|
|
|
/* clear the std error log*/
|
|
|
|
clear = std_err_main | CLEAR_STDERR_LOG;
|
2014-04-12 00:21:47 +08:00
|
|
|
writel_relaxed(clear, l3_targ_stderr);
|
2011-03-07 23:23:10 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
/* Nothing to be handled here as of now */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/* Error found so break the for loop */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
2014-04-12 02:09:36 +08:00
|
|
|
static int omap_l3_probe(struct platform_device *pdev)
|
2011-03-07 23:23:10 +08:00
|
|
|
{
|
2014-04-12 02:09:36 +08:00
|
|
|
static struct omap_l3 *l3;
|
2014-04-01 21:23:47 +08:00
|
|
|
int ret, i;
|
2011-03-07 23:23:10 +08:00
|
|
|
|
2014-04-01 21:23:46 +08:00
|
|
|
l3 = devm_kzalloc(&pdev->dev, sizeof(*l3), GFP_KERNEL);
|
2011-03-07 23:23:10 +08:00
|
|
|
if (!l3)
|
2011-04-19 00:39:41 +08:00
|
|
|
return -ENOMEM;
|
2011-03-07 23:23:10 +08:00
|
|
|
|
2014-04-12 01:04:01 +08:00
|
|
|
l3->dev = &pdev->dev;
|
2011-03-07 23:23:10 +08:00
|
|
|
platform_set_drvdata(pdev, l3);
|
|
|
|
|
2014-04-01 21:23:47 +08:00
|
|
|
/* Get mem resources */
|
|
|
|
for (i = 0; i < L3_MODULES; i++) {
|
|
|
|
struct resource *res = platform_get_resource(pdev,
|
|
|
|
IORESOURCE_MEM, i);
|
2011-03-07 23:23:10 +08:00
|
|
|
|
2014-04-01 21:23:47 +08:00
|
|
|
l3->l3_base[i] = devm_ioremap_resource(&pdev->dev, res);
|
|
|
|
if (IS_ERR(l3->l3_base[i])) {
|
2014-04-12 01:04:01 +08:00
|
|
|
dev_err(l3->dev, "ioremap %d failed\n", i);
|
2014-04-01 21:23:47 +08:00
|
|
|
return PTR_ERR(l3->l3_base[i]);
|
|
|
|
}
|
2011-03-07 23:23:10 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Setup interrupt Handlers
|
|
|
|
*/
|
2011-08-29 20:12:23 +08:00
|
|
|
l3->debug_irq = platform_get_irq(pdev, 0);
|
2014-04-12 01:04:01 +08:00
|
|
|
ret = devm_request_irq(l3->dev, l3->debug_irq, l3_interrupt_handler,
|
2014-04-01 21:23:48 +08:00
|
|
|
IRQF_DISABLED, "l3-dbg-irq", l3);
|
2011-03-07 23:23:10 +08:00
|
|
|
if (ret) {
|
2014-04-12 01:04:01 +08:00
|
|
|
dev_err(l3->dev, "request_irq failed for %d\n",
|
2014-04-01 21:23:50 +08:00
|
|
|
l3->debug_irq);
|
2014-04-01 21:23:47 +08:00
|
|
|
return ret;
|
2011-03-07 23:23:10 +08:00
|
|
|
}
|
|
|
|
|
2011-08-29 20:12:23 +08:00
|
|
|
l3->app_irq = platform_get_irq(pdev, 1);
|
2014-04-12 01:04:01 +08:00
|
|
|
ret = devm_request_irq(l3->dev, l3->app_irq, l3_interrupt_handler,
|
2014-04-01 21:23:48 +08:00
|
|
|
IRQF_DISABLED, "l3-app-irq", l3);
|
|
|
|
if (ret)
|
2014-04-12 01:04:01 +08:00
|
|
|
dev_err(l3->dev, "request_irq failed for %d\n", l3->app_irq);
|
2011-04-19 00:39:41 +08:00
|
|
|
|
2011-03-07 23:23:10 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2011-08-12 19:52:50 +08:00
|
|
|
#if defined(CONFIG_OF)
|
|
|
|
static const struct of_device_id l3_noc_match[] = {
|
|
|
|
{.compatible = "ti,omap4-l3-noc", },
|
|
|
|
{},
|
2011-11-24 06:45:37 +08:00
|
|
|
};
|
2011-08-12 19:52:50 +08:00
|
|
|
MODULE_DEVICE_TABLE(of, l3_noc_match);
|
|
|
|
#else
|
|
|
|
#define l3_noc_match NULL
|
|
|
|
#endif
|
|
|
|
|
2014-04-12 02:09:36 +08:00
|
|
|
static struct platform_driver omap_l3_driver = {
|
|
|
|
.probe = omap_l3_probe,
|
2011-08-12 19:52:50 +08:00
|
|
|
.driver = {
|
|
|
|
.name = "omap_l3_noc",
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.of_match_table = l3_noc_match,
|
2011-03-07 23:23:10 +08:00
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2014-04-12 02:09:36 +08:00
|
|
|
static int __init omap_l3_init(void)
|
2011-03-07 23:23:10 +08:00
|
|
|
{
|
2014-04-12 02:09:36 +08:00
|
|
|
return platform_driver_register(&omap_l3_driver);
|
2011-03-07 23:23:10 +08:00
|
|
|
}
|
2014-04-12 02:09:36 +08:00
|
|
|
postcore_initcall_sync(omap_l3_init);
|
2011-03-07 23:23:10 +08:00
|
|
|
|
2014-04-12 02:09:36 +08:00
|
|
|
static void __exit omap_l3_exit(void)
|
2011-03-07 23:23:10 +08:00
|
|
|
{
|
2014-04-12 02:09:36 +08:00
|
|
|
platform_driver_unregister(&omap_l3_driver);
|
2011-03-07 23:23:10 +08:00
|
|
|
}
|
2014-04-12 02:09:36 +08:00
|
|
|
module_exit(omap_l3_exit);
|