Commit 0ec8579e authored by Robert Richter's avatar Robert Richter Committed by Robert Richter
Browse files

edac, highbank: Add Calxeda ECX-2000 support 



Implement edac support for Calxeda ECX-2000.

The ECX-2000 memory controller is similar to Highbank but has
different register bases for error and interrupt registers. There is
an own device tree name "calxeda,ecx-2000-ddr-ctrl" for identification
and initialization of the ECX-2000 and its base addresses.

Signed-off-by: default avatarRobert Richter <robert.richter@linaro.org>
Acked-by: default avatarRob Herring <rob.herring@calxeda.com>
Signed-off-by: default avatarRobert Richter <rric@kernel.org>
parent 982ac2a7

drivers/edac/highbank_mc_edac.c

+70 −35
Original line number Diff line number Diff line
@@ -26,31 +26,40 @@ 
#include "edac_module.h"



/* DDR Ctrlr Error Registers */

#define HB_DDR_ECC_OPT			0x128

#define HB_DDR_ECC_U_ERR_ADDR		0x130

#define HB_DDR_ECC_U_ERR_STAT		0x134

#define HB_DDR_ECC_U_ERR_DATAL		0x138

#define HB_DDR_ECC_U_ERR_DATAH		0x13c

#define HB_DDR_ECC_C_ERR_ADDR		0x140

#define HB_DDR_ECC_C_ERR_STAT		0x144

#define HB_DDR_ECC_C_ERR_DATAL		0x148

#define HB_DDR_ECC_C_ERR_DATAH		0x14c

#define HB_DDR_ECC_INT_STATUS		0x180

#define HB_DDR_ECC_INT_ACK		0x184

#define HB_DDR_ECC_U_ERR_ID		0x424

#define HB_DDR_ECC_C_ERR_ID		0x428



#define HB_DDR_ECC_INT_STAT_CE		0x8

#define HB_DDR_ECC_INT_STAT_DOUBLE_CE	0x10

#define HB_DDR_ECC_INT_STAT_UE		0x20

#define HB_DDR_ECC_INT_STAT_DOUBLE_UE	0x40

#define HB_DDR_ECC_ERR_BASE		0x128

#define MW_DDR_ECC_ERR_BASE		0x1b4



#define HB_DDR_ECC_OPT			0x00

#define HB_DDR_ECC_U_ERR_ADDR		0x08

#define HB_DDR_ECC_U_ERR_STAT		0x0c

#define HB_DDR_ECC_U_ERR_DATAL		0x10

#define HB_DDR_ECC_U_ERR_DATAH		0x14

#define HB_DDR_ECC_C_ERR_ADDR		0x18

#define HB_DDR_ECC_C_ERR_STAT		0x1c

#define HB_DDR_ECC_C_ERR_DATAL		0x20

#define HB_DDR_ECC_C_ERR_DATAH		0x24



#define HB_DDR_ECC_OPT_MODE_MASK	0x3

#define HB_DDR_ECC_OPT_FWC		0x100

#define HB_DDR_ECC_OPT_XOR_SHIFT	16



/* DDR Ctrlr Interrupt Registers */



#define HB_DDR_ECC_INT_BASE		0x180

#define MW_DDR_ECC_INT_BASE		0x218



#define HB_DDR_ECC_INT_STATUS		0x00

#define HB_DDR_ECC_INT_ACK		0x04



#define HB_DDR_ECC_INT_STAT_CE		0x8

#define HB_DDR_ECC_INT_STAT_DOUBLE_CE	0x10

#define HB_DDR_ECC_INT_STAT_UE		0x20

#define HB_DDR_ECC_INT_STAT_DOUBLE_UE	0x40



struct hb_mc_drvdata {

	void __iomem *mc_vbase;

	void __iomem *mc_err_base;

	void __iomem *mc_int_base;

};



static irqreturn_t highbank_mc_err_handler(int irq, void *dev_id)
@@ -60,10 +69,10 @@ static irqreturn_t highbank_mc_err_handler(int irq, void *dev_id) 
	u32 status, err_addr;



	/* Read the interrupt status register */

	status = readl(drvdata->mc_vbase + HB_DDR_ECC_INT_STATUS);

	status = readl(drvdata->mc_int_base + HB_DDR_ECC_INT_STATUS);



	if (status & HB_DDR_ECC_INT_STAT_UE) {

		err_addr = readl(drvdata->mc_vbase + HB_DDR_ECC_U_ERR_ADDR);

		err_addr = readl(drvdata->mc_err_base + HB_DDR_ECC_U_ERR_ADDR);

		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,

				     err_addr >> PAGE_SHIFT,

				     err_addr & ~PAGE_MASK, 0,
@@ -71,9 +80,9 @@ static irqreturn_t highbank_mc_err_handler(int irq, void *dev_id) 
				     mci->ctl_name, "");

	}

	if (status & HB_DDR_ECC_INT_STAT_CE) {

		u32 syndrome = readl(drvdata->mc_vbase + HB_DDR_ECC_C_ERR_STAT);

		u32 syndrome = readl(drvdata->mc_err_base + HB_DDR_ECC_C_ERR_STAT);

		syndrome = (syndrome >> 8) & 0xff;

		err_addr = readl(drvdata->mc_vbase + HB_DDR_ECC_C_ERR_ADDR);

		err_addr = readl(drvdata->mc_err_base + HB_DDR_ECC_C_ERR_ADDR);

		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,

				     err_addr >> PAGE_SHIFT,

				     err_addr & ~PAGE_MASK, syndrome,
@@ -82,7 +91,7 @@ static irqreturn_t highbank_mc_err_handler(int irq, void *dev_id) 
	}



	/* clear the error, clears the interrupt */

	writel(status, drvdata->mc_vbase + HB_DDR_ECC_INT_ACK);

	writel(status, drvdata->mc_int_base + HB_DDR_ECC_INT_ACK);

	return IRQ_HANDLED;

}
@@ -104,10 +113,10 @@ static ssize_t highbank_mc_err_inject_write(struct file *file, 
	buf[buf_size] = 0;



	if (!kstrtou8(buf, 16, &synd)) {

		reg = readl(pdata->mc_vbase + HB_DDR_ECC_OPT);

		reg = readl(pdata->mc_err_base + HB_DDR_ECC_OPT);

		reg &= HB_DDR_ECC_OPT_MODE_MASK;

		reg |= (synd << HB_DDR_ECC_OPT_XOR_SHIFT) | HB_DDR_ECC_OPT_FWC;

		writel(reg, pdata->mc_vbase + HB_DDR_ECC_OPT);

		writel(reg, pdata->mc_err_base + HB_DDR_ECC_OPT);

	}



	return count;
@@ -131,17 +140,46 @@ static void highbank_mc_create_debugfs_nodes(struct mem_ctl_info *mci) 
{}

#endif



struct hb_mc_settings {

	int	err_offset;

	int	int_offset;

};



static struct hb_mc_settings hb_settings = {

	.err_offset = HB_DDR_ECC_ERR_BASE,

	.int_offset = HB_DDR_ECC_INT_BASE,

};



static struct hb_mc_settings mw_settings = {

	.err_offset = MW_DDR_ECC_ERR_BASE,

	.int_offset = MW_DDR_ECC_INT_BASE,

};



static struct of_device_id hb_ddr_ctrl_of_match[] = {

	{ .compatible = "calxeda,hb-ddr-ctrl",		.data = &hb_settings },

	{ .compatible = "calxeda,ecx-2000-ddr-ctrl",	.data = &mw_settings },

	{},

};

MODULE_DEVICE_TABLE(of, hb_ddr_ctrl_of_match);



static int highbank_mc_probe(struct platform_device *pdev)

{

	const struct of_device_id *id;

	const struct hb_mc_settings *settings;

	struct edac_mc_layer layers[2];

	struct mem_ctl_info *mci;

	struct hb_mc_drvdata *drvdata;

	struct dimm_info *dimm;

	struct resource *r;

	void __iomem *base;

	u32 control;

	int irq;

	int res = 0;



	id = of_match_device(hb_ddr_ctrl_of_match, &pdev->dev);

	if (!id)

		return -ENODEV;



	layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;

	layers[0].size = 1;

	layers[0].is_virt_csrow = true;
@@ -174,15 +212,18 @@ static int highbank_mc_probe(struct platform_device *pdev) 
		goto err;

	}



	drvdata->mc_vbase = devm_ioremap(&pdev->dev,

					  r->start, resource_size(r));

	if (!drvdata->mc_vbase) {

	base = devm_ioremap(&pdev->dev, r->start, resource_size(r));

	if (!base) {

		dev_err(&pdev->dev, "Unable to map regs\n");

		res = -ENOMEM;

		goto err;

	}



	control = readl(drvdata->mc_vbase + HB_DDR_ECC_OPT) & 0x3;

	settings = id->data;

	drvdata->mc_err_base = base + settings->err_offset;

	drvdata->mc_int_base = base + settings->int_offset;



	control = readl(drvdata->mc_err_base + HB_DDR_ECC_OPT) & 0x3;

	if (!control || (control == 0x2)) {

		dev_err(&pdev->dev, "No ECC present, or ECC disabled\n");

		res = -ENODEV;
@@ -238,12 +279,6 @@ static int highbank_mc_remove(struct platform_device *pdev) 
	return 0;

}



static const struct of_device_id hb_ddr_ctrl_of_match[] = {

	{ .compatible = "calxeda,hb-ddr-ctrl", },

	{},

};

MODULE_DEVICE_TABLE(of, hb_ddr_ctrl_of_match);



static struct platform_driver highbank_mc_edac_driver = {

	.probe = highbank_mc_probe,

	.remove = highbank_mc_remove,

CRA Git | Maintained and supported by SUSTech CRA and CCSE