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kernel_samsung_sm7125/drivers/edac/mpc85xx_edac.c

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/*
* Freescale MPC85xx Memory Controller kenel module
*
* Author: Dave Jiang <djiang@mvista.com>
*
* 2006-2007 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/ctype.h>
#include <linux/io.h>
#include <linux/mod_devicetable.h>
#include <linux/edac.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include <asm/mpc85xx.h>
#include "edac_module.h"
#include "edac_core.h"
#include "mpc85xx_edac.h"
static int edac_dev_idx;
static int edac_pci_idx;
static int edac_mc_idx;
static u32 orig_ddr_err_disable;
static u32 orig_ddr_err_sbe;
/*
* PCI Err defines
*/
#ifdef CONFIG_PCI
static u32 orig_pci_err_cap_dr;
static u32 orig_pci_err_en;
#endif
static u32 orig_l2_err_disable;
static u32 orig_hid1;
static const char *mpc85xx_ctl_name = "MPC85xx";
/************************ MC SYSFS parts ***********************************/
static ssize_t mpc85xx_mc_inject_data_hi_show(struct mem_ctl_info *mci,
char *data)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->mc_vbase +
MPC85XX_MC_DATA_ERR_INJECT_HI));
}
static ssize_t mpc85xx_mc_inject_data_lo_show(struct mem_ctl_info *mci,
char *data)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->mc_vbase +
MPC85XX_MC_DATA_ERR_INJECT_LO));
}
static ssize_t mpc85xx_mc_inject_ctrl_show(struct mem_ctl_info *mci, char *data)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT));
}
static ssize_t mpc85xx_mc_inject_data_hi_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_HI,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static ssize_t mpc85xx_mc_inject_data_lo_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_LO,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static ssize_t mpc85xx_mc_inject_ctrl_store(struct mem_ctl_info *mci,
const char *data, size_t count)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static struct mcidev_sysfs_attribute mpc85xx_mc_sysfs_attributes[] = {
{
.attr = {
.name = "inject_data_hi",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_mc_inject_data_hi_show,
.store = mpc85xx_mc_inject_data_hi_store},
{
.attr = {
.name = "inject_data_lo",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_mc_inject_data_lo_show,
.store = mpc85xx_mc_inject_data_lo_store},
{
.attr = {
.name = "inject_ctrl",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_mc_inject_ctrl_show,
.store = mpc85xx_mc_inject_ctrl_store},
/* End of list */
{
.attr = {.name = NULL}
}
};
static void mpc85xx_set_mc_sysfs_attributes(struct mem_ctl_info *mci)
{
mci->mc_driver_sysfs_attributes = mpc85xx_mc_sysfs_attributes;
}
/**************************** PCI Err device ***************************/
#ifdef CONFIG_PCI
static void mpc85xx_pci_check(struct edac_pci_ctl_info *pci)
{
struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
/* master aborts can happen during PCI config cycles */
if (!(err_detect & ~(PCI_EDE_MULTI_ERR | PCI_EDE_MST_ABRT))) {
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
return;
}
printk(KERN_ERR "PCI error(s) detected\n");
printk(KERN_ERR "PCI/X ERR_DR register: %#08x\n", err_detect);
printk(KERN_ERR "PCI/X ERR_ATTRIB register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ATTRIB));
printk(KERN_ERR "PCI/X ERR_ADDR register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR));
printk(KERN_ERR "PCI/X ERR_EXT_ADDR register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EXT_ADDR));
printk(KERN_ERR "PCI/X ERR_DL register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DL));
printk(KERN_ERR "PCI/X ERR_DH register: %#08x\n",
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DH));
/* clear error bits */
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
if (err_detect & PCI_EDE_PERR_MASK)
edac_pci_handle_pe(pci, pci->ctl_name);
if ((err_detect & ~PCI_EDE_MULTI_ERR) & ~PCI_EDE_PERR_MASK)
edac_pci_handle_npe(pci, pci->ctl_name);
}
static irqreturn_t mpc85xx_pci_isr(int irq, void *dev_id)
{
struct edac_pci_ctl_info *pci = dev_id;
struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
if (!err_detect)
return IRQ_NONE;
mpc85xx_pci_check(pci);
return IRQ_HANDLED;
}
static int __devinit mpc85xx_pci_err_probe(struct platform_device *pdev)
{
struct edac_pci_ctl_info *pci;
struct mpc85xx_pci_pdata *pdata;
struct resource *r;
int res = 0;
if (!devres_open_group(&pdev->dev, mpc85xx_pci_err_probe, GFP_KERNEL))
return -ENOMEM;
pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mpc85xx_pci_err");
if (!pci)
return -ENOMEM;
pdata = pci->pvt_info;
pdata->name = "mpc85xx_pci_err";
pdata->irq = NO_IRQ;
platform_set_drvdata(pdev, pci);
pci->dev = &pdev->dev;
pci->mod_name = EDAC_MOD_STR;
pci->ctl_name = pdata->name;
pci->dev_name = pdev->dev.bus_id;
if (edac_op_state == EDAC_OPSTATE_POLL)
pci->edac_check = mpc85xx_pci_check;
pdata->edac_idx = edac_pci_idx++;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r) {
printk(KERN_ERR "%s: Unable to get resource for "
"PCI err regs\n", __func__);
goto err;
}
if (!devm_request_mem_region(&pdev->dev, r->start,
r->end - r->start + 1, pdata->name)) {
printk(KERN_ERR "%s: Error while requesting mem region\n",
__func__);
res = -EBUSY;
goto err;
}
pdata->pci_vbase = devm_ioremap(&pdev->dev, r->start,
r->end - r->start + 1);
if (!pdata->pci_vbase) {
printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__);
res = -ENOMEM;
goto err;
}
orig_pci_err_cap_dr =
in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR);
/* PCI master abort is expected during config cycles */
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR, 0x40);
orig_pci_err_en = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN);
/* disable master abort reporting */
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, ~0x40);
/* clear error bits */
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, ~0);
if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
debugf3("%s(): failed edac_pci_add_device()\n", __func__);
goto err;
}
if (edac_op_state == EDAC_OPSTATE_INT) {
pdata->irq = platform_get_irq(pdev, 0);
res = devm_request_irq(&pdev->dev, pdata->irq,
mpc85xx_pci_isr, IRQF_DISABLED,
"[EDAC] PCI err", pci);
if (res < 0) {
printk(KERN_ERR
"%s: Unable to requiest irq %d for "
"MPC85xx PCI err\n", __func__, pdata->irq);
res = -ENODEV;
goto err2;
}
printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for PCI Err\n",
pdata->irq);
}
devres_remove_group(&pdev->dev, mpc85xx_pci_err_probe);
debugf3("%s(): success\n", __func__);
printk(KERN_INFO EDAC_MOD_STR " PCI err registered\n");
return 0;
err2:
edac_pci_del_device(&pdev->dev);
err:
edac_pci_free_ctl_info(pci);
devres_release_group(&pdev->dev, mpc85xx_pci_err_probe);
return res;
}
static int mpc85xx_pci_err_remove(struct platform_device *pdev)
{
struct edac_pci_ctl_info *pci = platform_get_drvdata(pdev);
struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
debugf0("%s()\n", __func__);
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR,
orig_pci_err_cap_dr);
out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, orig_pci_err_en);
edac_pci_del_device(pci->dev);
if (edac_op_state == EDAC_OPSTATE_INT)
irq_dispose_mapping(pdata->irq);
edac_pci_free_ctl_info(pci);
return 0;
}
static struct platform_driver mpc85xx_pci_err_driver = {
.probe = mpc85xx_pci_err_probe,
.remove = __devexit_p(mpc85xx_pci_err_remove),
.driver = {
.name = "mpc85xx_pci_err",
}
};
#endif /* CONFIG_PCI */
/**************************** L2 Err device ***************************/
/************************ L2 SYSFS parts ***********************************/
static ssize_t mpc85xx_l2_inject_data_hi_show(struct edac_device_ctl_info
*edac_dev, char *data)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI));
}
static ssize_t mpc85xx_l2_inject_data_lo_show(struct edac_device_ctl_info
*edac_dev, char *data)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO));
}
static ssize_t mpc85xx_l2_inject_ctrl_show(struct edac_device_ctl_info
*edac_dev, char *data)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
return sprintf(data, "0x%08x",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL));
}
static ssize_t mpc85xx_l2_inject_data_hi_store(struct edac_device_ctl_info
*edac_dev, const char *data,
size_t count)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static ssize_t mpc85xx_l2_inject_data_lo_store(struct edac_device_ctl_info
*edac_dev, const char *data,
size_t count)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static ssize_t mpc85xx_l2_inject_ctrl_store(struct edac_device_ctl_info
*edac_dev, const char *data,
size_t count)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
if (isdigit(*data)) {
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL,
simple_strtoul(data, NULL, 0));
return count;
}
return 0;
}
static struct edac_dev_sysfs_attribute mpc85xx_l2_sysfs_attributes[] = {
{
.attr = {
.name = "inject_data_hi",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_l2_inject_data_hi_show,
.store = mpc85xx_l2_inject_data_hi_store},
{
.attr = {
.name = "inject_data_lo",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_l2_inject_data_lo_show,
.store = mpc85xx_l2_inject_data_lo_store},
{
.attr = {
.name = "inject_ctrl",
.mode = (S_IRUGO | S_IWUSR)
},
.show = mpc85xx_l2_inject_ctrl_show,
.store = mpc85xx_l2_inject_ctrl_store},
/* End of list */
{
.attr = {.name = NULL}
}
};
static void mpc85xx_set_l2_sysfs_attributes(struct edac_device_ctl_info
*edac_dev)
{
edac_dev->sysfs_attributes = mpc85xx_l2_sysfs_attributes;
}
/***************************** L2 ops ***********************************/
static void mpc85xx_l2_check(struct edac_device_ctl_info *edac_dev)
{
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
if (!(err_detect & L2_EDE_MASK))
return;
printk(KERN_ERR "ECC Error in CPU L2 cache\n");
printk(KERN_ERR "L2 Error Detect Register: 0x%08x\n", err_detect);
printk(KERN_ERR "L2 Error Capture Data High Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATAHI));
printk(KERN_ERR "L2 Error Capture Data Lo Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATALO));
printk(KERN_ERR "L2 Error Syndrome Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTECC));
printk(KERN_ERR "L2 Error Attributes Capture Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRATTR));
printk(KERN_ERR "L2 Error Address Capture Register: 0x%08x\n",
in_be32(pdata->l2_vbase + MPC85XX_L2_ERRADDR));
/* clear error detect register */
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, err_detect);
if (err_detect & L2_EDE_CE_MASK)
edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
if (err_detect & L2_EDE_UE_MASK)
edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
}
static irqreturn_t mpc85xx_l2_isr(int irq, void *dev_id)
{
struct edac_device_ctl_info *edac_dev = dev_id;
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
if (!(err_detect & L2_EDE_MASK))
return IRQ_NONE;
mpc85xx_l2_check(edac_dev);
return IRQ_HANDLED;
}
static int __devinit mpc85xx_l2_err_probe(struct of_device *op,
const struct of_device_id *match)
{
struct edac_device_ctl_info *edac_dev;
struct mpc85xx_l2_pdata *pdata;
struct resource r;
int res;
if (!devres_open_group(&op->dev, mpc85xx_l2_err_probe, GFP_KERNEL))
return -ENOMEM;
edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata),
"cpu", 1, "L", 1, 2, NULL, 0,
edac_dev_idx);
if (!edac_dev) {
devres_release_group(&op->dev, mpc85xx_l2_err_probe);
return -ENOMEM;
}
pdata = edac_dev->pvt_info;
pdata->name = "mpc85xx_l2_err";
pdata->irq = NO_IRQ;
edac_dev->dev = &op->dev;
dev_set_drvdata(edac_dev->dev, edac_dev);
edac_dev->ctl_name = pdata->name;
edac_dev->dev_name = pdata->name;
res = of_address_to_resource(op->node, 0, &r);
if (res) {
printk(KERN_ERR "%s: Unable to get resource for "
"L2 err regs\n", __func__);
goto err;
}
/* we only need the error registers */
r.start += 0xe00;
if (!devm_request_mem_region(&op->dev, r.start,
r.end - r.start + 1, pdata->name)) {
printk(KERN_ERR "%s: Error while requesting mem region\n",
__func__);
res = -EBUSY;
goto err;
}
pdata->l2_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
if (!pdata->l2_vbase) {
printk(KERN_ERR "%s: Unable to setup L2 err regs\n", __func__);
res = -ENOMEM;
goto err;
}
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, ~0);
orig_l2_err_disable = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS);
/* clear the err_dis */
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, 0);
edac_dev->mod_name = EDAC_MOD_STR;
if (edac_op_state == EDAC_OPSTATE_POLL)
edac_dev->edac_check = mpc85xx_l2_check;
mpc85xx_set_l2_sysfs_attributes(edac_dev);
pdata->edac_idx = edac_dev_idx++;
if (edac_device_add_device(edac_dev) > 0) {
debugf3("%s(): failed edac_device_add_device()\n", __func__);
goto err;
}
if (edac_op_state == EDAC_OPSTATE_INT) {
pdata->irq = irq_of_parse_and_map(op->node, 0);
res = devm_request_irq(&op->dev, pdata->irq,
mpc85xx_l2_isr, IRQF_DISABLED,
"[EDAC] L2 err", edac_dev);
if (res < 0) {
printk(KERN_ERR
"%s: Unable to requiest irq %d for "
"MPC85xx L2 err\n", __func__, pdata->irq);
irq_dispose_mapping(pdata->irq);
res = -ENODEV;
goto err2;
}
printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for L2 Err\n",
pdata->irq);
edac_dev->op_state = OP_RUNNING_INTERRUPT;
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, L2_EIE_MASK);
}
devres_remove_group(&op->dev, mpc85xx_l2_err_probe);
debugf3("%s(): success\n", __func__);
printk(KERN_INFO EDAC_MOD_STR " L2 err registered\n");
return 0;
err2:
edac_device_del_device(&op->dev);
err:
devres_release_group(&op->dev, mpc85xx_l2_err_probe);
edac_device_free_ctl_info(edac_dev);
return res;
}
static int mpc85xx_l2_err_remove(struct of_device *op)
{
struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&op->dev);
struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
debugf0("%s()\n", __func__);
if (edac_op_state == EDAC_OPSTATE_INT) {
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, 0);
irq_dispose_mapping(pdata->irq);
}
out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, orig_l2_err_disable);
edac_device_del_device(&op->dev);
edac_device_free_ctl_info(edac_dev);
return 0;
}
static struct of_device_id mpc85xx_l2_err_of_match[] = {
{
.compatible = "fsl,8540-l2-cache-controller",
},
{
.compatible = "fsl,8541-l2-cache-controller",
},
{
.compatible = "fsl,8544-l2-cache-controller",
},
{
.compatible = "fsl,8548-l2-cache-controller",
},
{
.compatible = "fsl,8555-l2-cache-controller",
},
{
.compatible = "fsl,8568-l2-cache-controller",
},
{},
};
static struct of_platform_driver mpc85xx_l2_err_driver = {
.owner = THIS_MODULE,
.name = "mpc85xx_l2_err",
.match_table = mpc85xx_l2_err_of_match,
.probe = mpc85xx_l2_err_probe,
.remove = mpc85xx_l2_err_remove,
.driver = {
.name = "mpc85xx_l2_err",
.owner = THIS_MODULE,
},
};
/**************************** MC Err device ***************************/
static void mpc85xx_mc_check(struct mem_ctl_info *mci)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
struct csrow_info *csrow;
u32 err_detect;
u32 syndrome;
u32 err_addr;
u32 pfn;
int row_index;
err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
if (err_detect)
return;
mpc85xx_mc_printk(mci, KERN_ERR, "Err Detect Register: %#8.8x\n",
err_detect);
/* no more processing if not ECC bit errors */
if (!(err_detect & (DDR_EDE_SBE | DDR_EDE_MBE))) {
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
return;
}
syndrome = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ECC);
err_addr = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ADDRESS);
pfn = err_addr >> PAGE_SHIFT;
for (row_index = 0; row_index < mci->nr_csrows; row_index++) {
csrow = &mci->csrows[row_index];
if ((pfn >= csrow->first_page) && (pfn <= csrow->last_page))
break;
}
mpc85xx_mc_printk(mci, KERN_ERR, "Capture Data High: %#8.8x\n",
in_be32(pdata->mc_vbase +
MPC85XX_MC_CAPTURE_DATA_HI));
mpc85xx_mc_printk(mci, KERN_ERR, "Capture Data Low: %#8.8x\n",
in_be32(pdata->mc_vbase +
MPC85XX_MC_CAPTURE_DATA_LO));
mpc85xx_mc_printk(mci, KERN_ERR, "syndrome: %#8.8x\n", syndrome);
mpc85xx_mc_printk(mci, KERN_ERR, "err addr: %#8.8x\n", err_addr);
mpc85xx_mc_printk(mci, KERN_ERR, "PFN: %#8.8x\n", pfn);
/* we are out of range */
if (row_index == mci->nr_csrows)
mpc85xx_mc_printk(mci, KERN_ERR, "PFN out of range!\n");
if (err_detect & DDR_EDE_SBE)
edac_mc_handle_ce(mci, pfn, err_addr & PAGE_MASK,
syndrome, row_index, 0, mci->ctl_name);
if (err_detect & DDR_EDE_MBE)
edac_mc_handle_ue(mci, pfn, err_addr & PAGE_MASK,
row_index, mci->ctl_name);
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
}
static irqreturn_t mpc85xx_mc_isr(int irq, void *dev_id)
{
struct mem_ctl_info *mci = dev_id;
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
u32 err_detect;
err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
if (!err_detect)
return IRQ_NONE;
mpc85xx_mc_check(mci);
return IRQ_HANDLED;
}
static void __devinit mpc85xx_init_csrows(struct mem_ctl_info *mci)
{
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
struct csrow_info *csrow;
u32 sdram_ctl;
u32 sdtype;
enum mem_type mtype;
u32 cs_bnds;
int index;
sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
sdtype = sdram_ctl & DSC_SDTYPE_MASK;
if (sdram_ctl & DSC_RD_EN) {
switch (sdtype) {
case DSC_SDTYPE_DDR:
mtype = MEM_RDDR;
break;
case DSC_SDTYPE_DDR2:
mtype = MEM_RDDR2;
break;
default:
mtype = MEM_UNKNOWN;
break;
}
} else {
switch (sdtype) {
case DSC_SDTYPE_DDR:
mtype = MEM_DDR;
break;
case DSC_SDTYPE_DDR2:
mtype = MEM_DDR2;
break;
default:
mtype = MEM_UNKNOWN;
break;
}
}
for (index = 0; index < mci->nr_csrows; index++) {
u32 start;
u32 end;
csrow = &mci->csrows[index];
cs_bnds = in_be32(pdata->mc_vbase + MPC85XX_MC_CS_BNDS_0 +
(index * MPC85XX_MC_CS_BNDS_OFS));
start = (cs_bnds & 0xfff0000) << 4;
end = ((cs_bnds & 0xfff) << 20);
if (start)
start |= 0xfffff;
if (end)
end |= 0xfffff;
if (start == end)
continue; /* not populated */
csrow->first_page = start >> PAGE_SHIFT;
csrow->last_page = end >> PAGE_SHIFT;
csrow->nr_pages = csrow->last_page + 1 - csrow->first_page;
csrow->grain = 8;
csrow->mtype = mtype;
csrow->dtype = DEV_UNKNOWN;
if (sdram_ctl & DSC_X32_EN)
csrow->dtype = DEV_X32;
csrow->edac_mode = EDAC_SECDED;
}
}
static int __devinit mpc85xx_mc_err_probe(struct of_device *op,
const struct of_device_id *match)
{
struct mem_ctl_info *mci;
struct mpc85xx_mc_pdata *pdata;
struct resource r;
u32 sdram_ctl;
int res;
if (!devres_open_group(&op->dev, mpc85xx_mc_err_probe, GFP_KERNEL))
return -ENOMEM;
mci = edac_mc_alloc(sizeof(*pdata), 4, 1, edac_mc_idx);
if (!mci) {
devres_release_group(&op->dev, mpc85xx_mc_err_probe);
return -ENOMEM;
}
pdata = mci->pvt_info;
pdata->name = "mpc85xx_mc_err";
pdata->irq = NO_IRQ;
mci->dev = &op->dev;
pdata->edac_idx = edac_mc_idx++;
dev_set_drvdata(mci->dev, mci);
mci->ctl_name = pdata->name;
mci->dev_name = pdata->name;
res = of_address_to_resource(op->node, 0, &r);
if (res) {
printk(KERN_ERR "%s: Unable to get resource for MC err regs\n",
__func__);
goto err;
}
if (!devm_request_mem_region(&op->dev, r.start,
r.end - r.start + 1, pdata->name)) {
printk(KERN_ERR "%s: Error while requesting mem region\n",
__func__);
res = -EBUSY;
goto err;
}
pdata->mc_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
if (!pdata->mc_vbase) {
printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__);
res = -ENOMEM;
goto err;
}
sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
if (!(sdram_ctl & DSC_ECC_EN)) {
/* no ECC */
printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__);
res = -ENODEV;
goto err;
}
debugf3("%s(): init mci\n", __func__);
mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_RDDR2 |
MEM_FLAG_DDR | MEM_FLAG_DDR2;
mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
mci->edac_cap = EDAC_FLAG_SECDED;
mci->mod_name = EDAC_MOD_STR;
mci->mod_ver = MPC85XX_REVISION;
if (edac_op_state == EDAC_OPSTATE_POLL)
mci->edac_check = mpc85xx_mc_check;
mci->ctl_page_to_phys = NULL;
mci->scrub_mode = SCRUB_SW_SRC;
mpc85xx_set_mc_sysfs_attributes(mci);
mpc85xx_init_csrows(mci);
#ifdef CONFIG_EDAC_DEBUG
edac_mc_register_mcidev_debug((struct attribute **)debug_attr);
#endif
/* store the original error disable bits */
orig_ddr_err_disable =
in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE);
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE, 0);
/* clear all error bits */
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, ~0);
if (edac_mc_add_mc(mci)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
goto err;
}
if (edac_op_state == EDAC_OPSTATE_INT) {
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN,
DDR_EIE_MBEE | DDR_EIE_SBEE);
/* store the original error management threshold */
orig_ddr_err_sbe = in_be32(pdata->mc_vbase +
MPC85XX_MC_ERR_SBE) & 0xff0000;
/* set threshold to 1 error per interrupt */
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, 0x10000);
/* register interrupts */
pdata->irq = irq_of_parse_and_map(op->node, 0);
res = devm_request_irq(&op->dev, pdata->irq,
mpc85xx_mc_isr, IRQF_DISABLED,
"[EDAC] MC err", mci);
if (res < 0) {
printk(KERN_ERR "%s: Unable to request irq %d for "
"MPC85xx DRAM ERR\n", __func__, pdata->irq);
irq_dispose_mapping(pdata->irq);
res = -ENODEV;
goto err2;
}
printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC\n",
pdata->irq);
}
devres_remove_group(&op->dev, mpc85xx_mc_err_probe);
debugf3("%s(): success\n", __func__);
printk(KERN_INFO EDAC_MOD_STR " MC err registered\n");
return 0;
err2:
edac_mc_del_mc(&op->dev);
err:
devres_release_group(&op->dev, mpc85xx_mc_err_probe);
edac_mc_free(mci);
return res;
}
static int mpc85xx_mc_err_remove(struct of_device *op)
{
struct mem_ctl_info *mci = dev_get_drvdata(&op->dev);
struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
debugf0("%s()\n", __func__);
if (edac_op_state == EDAC_OPSTATE_INT) {
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN, 0);
irq_dispose_mapping(pdata->irq);
}
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE,
orig_ddr_err_disable);
out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, orig_ddr_err_sbe);
edac_mc_del_mc(&op->dev);
edac_mc_free(mci);
return 0;
}
static struct of_device_id mpc85xx_mc_err_of_match[] = {
{
.compatible = "fsl,8540-memory-controller",
},
{
.compatible = "fsl,8541-memory-controller",
},
{
.compatible = "fsl,8544-memory-controller",
},
{
.compatible = "fsl,8548-memory-controller",
},
{
.compatible = "fsl,8555-memory-controller",
},
{
.compatible = "fsl,8568-memory-controller",
},
{},
};
static struct of_platform_driver mpc85xx_mc_err_driver = {
.owner = THIS_MODULE,
.name = "mpc85xx_mc_err",
.match_table = mpc85xx_mc_err_of_match,
.probe = mpc85xx_mc_err_probe,
.remove = mpc85xx_mc_err_remove,
.driver = {
.name = "mpc85xx_mc_err",
.owner = THIS_MODULE,
},
};
static int __init mpc85xx_mc_init(void)
{
int res = 0;
printk(KERN_INFO "Freescale(R) MPC85xx EDAC driver, "
"(C) 2006 Montavista Software\n");
/* make sure error reporting method is sane */
switch (edac_op_state) {
case EDAC_OPSTATE_POLL:
case EDAC_OPSTATE_INT:
break;
default:
edac_op_state = EDAC_OPSTATE_INT;
break;
}
res = of_register_platform_driver(&mpc85xx_mc_err_driver);
if (res)
printk(KERN_WARNING EDAC_MOD_STR "MC fails to register\n");
res = of_register_platform_driver(&mpc85xx_l2_err_driver);
if (res)
printk(KERN_WARNING EDAC_MOD_STR "L2 fails to register\n");
#ifdef CONFIG_PCI
res = platform_driver_register(&mpc85xx_pci_err_driver);
if (res)
printk(KERN_WARNING EDAC_MOD_STR "PCI fails to register\n");
#endif
/*
* need to clear HID1[RFXE] to disable machine check int
* so we can catch it
*/
if (edac_op_state == EDAC_OPSTATE_INT) {
orig_hid1 = mfspr(SPRN_HID1);
mtspr(SPRN_HID1, (orig_hid1 & ~0x20000));
}
return 0;
}
module_init(mpc85xx_mc_init);
static void __exit mpc85xx_mc_exit(void)
{
mtspr(SPRN_HID1, orig_hid1);
#ifdef CONFIG_PCI
platform_driver_unregister(&mpc85xx_pci_err_driver);
#endif
of_unregister_platform_driver(&mpc85xx_l2_err_driver);
of_unregister_platform_driver(&mpc85xx_mc_err_driver);
}
module_exit(mpc85xx_mc_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Montavista Software, Inc.");
module_param(edac_op_state, int, 0444);
MODULE_PARM_DESC(edac_op_state,
"EDAC Error Reporting state: 0=Poll, 2=Interrupt");