From: Robert Richter robert.richter@linaro.org
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: Robert Richter robert.richter@linaro.org Signed-off-by: Robert Richter rric@kernel.org --- drivers/edac/highbank_mc_edac.c | 105 ++++++++++++++++++++++++++-------------- 1 file changed, 70 insertions(+), 35 deletions(-)
diff --git a/drivers/edac/highbank_mc_edac.c b/drivers/edac/highbank_mc_edac.c index 7a78307..79cb872 100644 --- a/drivers/edac/highbank_mc_edac.c +++ b/drivers/edac/highbank_mc_edac.c @@ -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,