diff options
Diffstat (limited to 'drivers/edac/mv64x60_edac.c')
| -rw-r--r-- | drivers/edac/mv64x60_edac.c | 883 |
1 files changed, 883 insertions, 0 deletions
diff --git a/drivers/edac/mv64x60_edac.c b/drivers/edac/mv64x60_edac.c new file mode 100644 index 000000000..3c68bb525 --- /dev/null +++ b/drivers/edac/mv64x60_edac.c @@ -0,0 +1,883 @@ +/* + * Marvell MV64x60 Memory Controller kernel module for PPC platforms + * + * 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/interrupt.h> +#include <linux/io.h> +#include <linux/edac.h> +#include <linux/gfp.h> + +#include "edac_module.h" +#include "mv64x60_edac.h" + +static const char *mv64x60_ctl_name = "MV64x60"; +static int edac_dev_idx; +static int edac_pci_idx; +static int edac_mc_idx; + +/*********************** PCI err device **********************************/ +#ifdef CONFIG_PCI +static void mv64x60_pci_check(struct edac_pci_ctl_info *pci) +{ + struct mv64x60_pci_pdata *pdata = pci->pvt_info; + u32 cause; + + cause = readl(pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE); + if (!cause) + return; + + printk(KERN_ERR "Error in PCI %d Interface\n", pdata->pci_hose); + printk(KERN_ERR "Cause register: 0x%08x\n", cause); + printk(KERN_ERR "Address Low: 0x%08x\n", + readl(pdata->pci_vbase + MV64X60_PCI_ERROR_ADDR_LO)); + printk(KERN_ERR "Address High: 0x%08x\n", + readl(pdata->pci_vbase + MV64X60_PCI_ERROR_ADDR_HI)); + printk(KERN_ERR "Attribute: 0x%08x\n", + readl(pdata->pci_vbase + MV64X60_PCI_ERROR_ATTR)); + printk(KERN_ERR "Command: 0x%08x\n", + readl(pdata->pci_vbase + MV64X60_PCI_ERROR_CMD)); + writel(~cause, pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE); + + if (cause & MV64X60_PCI_PE_MASK) + edac_pci_handle_pe(pci, pci->ctl_name); + + if (!(cause & MV64X60_PCI_PE_MASK)) + edac_pci_handle_npe(pci, pci->ctl_name); +} + +static irqreturn_t mv64x60_pci_isr(int irq, void *dev_id) +{ + struct edac_pci_ctl_info *pci = dev_id; + struct mv64x60_pci_pdata *pdata = pci->pvt_info; + u32 val; + + val = readl(pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE); + if (!val) + return IRQ_NONE; + + mv64x60_pci_check(pci); + + return IRQ_HANDLED; +} + +/* + * Bit 0 of MV64x60_PCIx_ERR_MASK does not exist on the 64360 and because of + * errata FEr-#11 and FEr-##16 for the 64460, it should be 0 on that chip as + * well. IOW, don't set bit 0. + */ + +/* Erratum FEr PCI-#16: clear bit 0 of PCI SERRn Mask reg. */ +static int __init mv64x60_pci_fixup(struct platform_device *pdev) +{ + struct resource *r; + void __iomem *pci_serr; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!r) { + printk(KERN_ERR "%s: Unable to get resource for " + "PCI err regs\n", __func__); + return -ENOENT; + } + + pci_serr = ioremap(r->start, resource_size(r)); + if (!pci_serr) + return -ENOMEM; + + writel(readl(pci_serr) & ~0x1, pci_serr); + iounmap(pci_serr); + + return 0; +} + +static int mv64x60_pci_err_probe(struct platform_device *pdev) +{ + struct edac_pci_ctl_info *pci; + struct mv64x60_pci_pdata *pdata; + struct resource *r; + int res = 0; + + if (!devres_open_group(&pdev->dev, mv64x60_pci_err_probe, GFP_KERNEL)) + return -ENOMEM; + + pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mv64x60_pci_err"); + if (!pci) + return -ENOMEM; + + pdata = pci->pvt_info; + + pdata->pci_hose = pdev->id; + pdata->name = "mv64x60_pci_err"; + platform_set_drvdata(pdev, pci); + pci->dev = &pdev->dev; + pci->dev_name = dev_name(&pdev->dev); + pci->mod_name = EDAC_MOD_STR; + pci->ctl_name = pdata->name; + + if (edac_op_state == EDAC_OPSTATE_POLL) + pci->edac_check = mv64x60_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__); + res = -ENOENT; + goto err; + } + + if (!devm_request_mem_region(&pdev->dev, + r->start, + resource_size(r), + 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, + resource_size(r)); + if (!pdata->pci_vbase) { + printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__); + res = -ENOMEM; + goto err; + } + + res = mv64x60_pci_fixup(pdev); + if (res < 0) { + printk(KERN_ERR "%s: PCI fixup failed\n", __func__); + goto err; + } + + writel(0, pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE); + writel(0, pdata->pci_vbase + MV64X60_PCI_ERROR_MASK); + writel(MV64X60_PCIx_ERR_MASK_VAL, + pdata->pci_vbase + MV64X60_PCI_ERROR_MASK); + + if (edac_pci_add_device(pci, pdata->edac_idx) > 0) { + edac_dbg(3, "failed edac_pci_add_device()\n"); + goto err; + } + + if (edac_op_state == EDAC_OPSTATE_INT) { + pdata->irq = platform_get_irq(pdev, 0); + res = devm_request_irq(&pdev->dev, + pdata->irq, + mv64x60_pci_isr, + 0, + "[EDAC] PCI err", + pci); + if (res < 0) { + printk(KERN_ERR "%s: Unable to request irq %d for " + "MV64x60 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, mv64x60_pci_err_probe); + + /* get this far and it's successful */ + edac_dbg(3, "success\n"); + + return 0; + +err2: + edac_pci_del_device(&pdev->dev); +err: + edac_pci_free_ctl_info(pci); + devres_release_group(&pdev->dev, mv64x60_pci_err_probe); + return res; +} + +static int mv64x60_pci_err_remove(struct platform_device *pdev) +{ + struct edac_pci_ctl_info *pci = platform_get_drvdata(pdev); + + edac_dbg(0, "\n"); + + edac_pci_del_device(&pdev->dev); + + edac_pci_free_ctl_info(pci); + + return 0; +} + +static struct platform_driver mv64x60_pci_err_driver = { + .probe = mv64x60_pci_err_probe, + .remove = mv64x60_pci_err_remove, + .driver = { + .name = "mv64x60_pci_err", + } +}; + +#endif /* CONFIG_PCI */ + +/*********************** SRAM err device **********************************/ +static void mv64x60_sram_check(struct edac_device_ctl_info *edac_dev) +{ + struct mv64x60_sram_pdata *pdata = edac_dev->pvt_info; + u32 cause; + + cause = readl(pdata->sram_vbase + MV64X60_SRAM_ERR_CAUSE); + if (!cause) + return; + + printk(KERN_ERR "Error in internal SRAM\n"); + printk(KERN_ERR "Cause register: 0x%08x\n", cause); + printk(KERN_ERR "Address Low: 0x%08x\n", + readl(pdata->sram_vbase + MV64X60_SRAM_ERR_ADDR_LO)); + printk(KERN_ERR "Address High: 0x%08x\n", + readl(pdata->sram_vbase + MV64X60_SRAM_ERR_ADDR_HI)); + printk(KERN_ERR "Data Low: 0x%08x\n", + readl(pdata->sram_vbase + MV64X60_SRAM_ERR_DATA_LO)); + printk(KERN_ERR "Data High: 0x%08x\n", + readl(pdata->sram_vbase + MV64X60_SRAM_ERR_DATA_HI)); + printk(KERN_ERR "Parity: 0x%08x\n", + readl(pdata->sram_vbase + MV64X60_SRAM_ERR_PARITY)); + writel(0, pdata->sram_vbase + MV64X60_SRAM_ERR_CAUSE); + + edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name); +} + +static irqreturn_t mv64x60_sram_isr(int irq, void *dev_id) +{ + struct edac_device_ctl_info *edac_dev = dev_id; + struct mv64x60_sram_pdata *pdata = edac_dev->pvt_info; + u32 cause; + + cause = readl(pdata->sram_vbase + MV64X60_SRAM_ERR_CAUSE); + if (!cause) + return IRQ_NONE; + + mv64x60_sram_check(edac_dev); + + return IRQ_HANDLED; +} + +static int mv64x60_sram_err_probe(struct platform_device *pdev) +{ + struct edac_device_ctl_info *edac_dev; + struct mv64x60_sram_pdata *pdata; + struct resource *r; + int res = 0; + + if (!devres_open_group(&pdev->dev, mv64x60_sram_err_probe, GFP_KERNEL)) + return -ENOMEM; + + edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata), + "sram", 1, NULL, 0, 0, NULL, 0, + edac_dev_idx); + if (!edac_dev) { + devres_release_group(&pdev->dev, mv64x60_sram_err_probe); + return -ENOMEM; + } + + pdata = edac_dev->pvt_info; + pdata->name = "mv64x60_sram_err"; + edac_dev->dev = &pdev->dev; + platform_set_drvdata(pdev, edac_dev); + edac_dev->dev_name = dev_name(&pdev->dev); + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) { + printk(KERN_ERR "%s: Unable to get resource for " + "SRAM err regs\n", __func__); + res = -ENOENT; + goto err; + } + + if (!devm_request_mem_region(&pdev->dev, + r->start, + resource_size(r), + pdata->name)) { + printk(KERN_ERR "%s: Error while request mem region\n", + __func__); + res = -EBUSY; + goto err; + } + + pdata->sram_vbase = devm_ioremap(&pdev->dev, + r->start, + resource_size(r)); + if (!pdata->sram_vbase) { + printk(KERN_ERR "%s: Unable to setup SRAM err regs\n", + __func__); + res = -ENOMEM; + goto err; + } + + /* setup SRAM err registers */ + writel(0, pdata->sram_vbase + MV64X60_SRAM_ERR_CAUSE); + + edac_dev->mod_name = EDAC_MOD_STR; + edac_dev->ctl_name = pdata->name; + + if (edac_op_state == EDAC_OPSTATE_POLL) + edac_dev->edac_check = mv64x60_sram_check; + + pdata->edac_idx = edac_dev_idx++; + + if (edac_device_add_device(edac_dev) > 0) { + edac_dbg(3, "failed edac_device_add_device()\n"); + goto err; + } + + if (edac_op_state == EDAC_OPSTATE_INT) { + pdata->irq = platform_get_irq(pdev, 0); + res = devm_request_irq(&pdev->dev, + pdata->irq, + mv64x60_sram_isr, + 0, + "[EDAC] SRAM err", + edac_dev); + if (res < 0) { + printk(KERN_ERR + "%s: Unable to request irq %d for " + "MV64x60 SRAM ERR\n", __func__, pdata->irq); + res = -ENODEV; + goto err2; + } + + printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for SRAM Err\n", + pdata->irq); + } + + devres_remove_group(&pdev->dev, mv64x60_sram_err_probe); + + /* get this far and it's successful */ + edac_dbg(3, "success\n"); + + return 0; + +err2: + edac_device_del_device(&pdev->dev); +err: + devres_release_group(&pdev->dev, mv64x60_sram_err_probe); + edac_device_free_ctl_info(edac_dev); + return res; +} + +static int mv64x60_sram_err_remove(struct platform_device *pdev) +{ + struct edac_device_ctl_info *edac_dev = platform_get_drvdata(pdev); + + edac_dbg(0, "\n"); + + edac_device_del_device(&pdev->dev); + edac_device_free_ctl_info(edac_dev); + + return 0; +} + +static struct platform_driver mv64x60_sram_err_driver = { + .probe = mv64x60_sram_err_probe, + .remove = mv64x60_sram_err_remove, + .driver = { + .name = "mv64x60_sram_err", + } +}; + +/*********************** CPU err device **********************************/ +static void mv64x60_cpu_check(struct edac_device_ctl_info *edac_dev) +{ + struct mv64x60_cpu_pdata *pdata = edac_dev->pvt_info; + u32 cause; + + cause = readl(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_CAUSE) & + MV64x60_CPU_CAUSE_MASK; + if (!cause) + return; + + printk(KERN_ERR "Error on CPU interface\n"); + printk(KERN_ERR "Cause register: 0x%08x\n", cause); + printk(KERN_ERR "Address Low: 0x%08x\n", + readl(pdata->cpu_vbase[0] + MV64x60_CPU_ERR_ADDR_LO)); + printk(KERN_ERR "Address High: 0x%08x\n", + readl(pdata->cpu_vbase[0] + MV64x60_CPU_ERR_ADDR_HI)); + printk(KERN_ERR "Data Low: 0x%08x\n", + readl(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_DATA_LO)); + printk(KERN_ERR "Data High: 0x%08x\n", + readl(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_DATA_HI)); + printk(KERN_ERR "Parity: 0x%08x\n", + readl(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_PARITY)); + writel(0, pdata->cpu_vbase[1] + MV64x60_CPU_ERR_CAUSE); + + edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name); +} + +static irqreturn_t mv64x60_cpu_isr(int irq, void *dev_id) +{ + struct edac_device_ctl_info *edac_dev = dev_id; + struct mv64x60_cpu_pdata *pdata = edac_dev->pvt_info; + u32 cause; + + cause = readl(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_CAUSE) & + MV64x60_CPU_CAUSE_MASK; + if (!cause) + return IRQ_NONE; + + mv64x60_cpu_check(edac_dev); + + return IRQ_HANDLED; +} + +static int mv64x60_cpu_err_probe(struct platform_device *pdev) +{ + struct edac_device_ctl_info *edac_dev; + struct resource *r; + struct mv64x60_cpu_pdata *pdata; + int res = 0; + + if (!devres_open_group(&pdev->dev, mv64x60_cpu_err_probe, GFP_KERNEL)) + return -ENOMEM; + + edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata), + "cpu", 1, NULL, 0, 0, NULL, 0, + edac_dev_idx); + if (!edac_dev) { + devres_release_group(&pdev->dev, mv64x60_cpu_err_probe); + return -ENOMEM; + } + + pdata = edac_dev->pvt_info; + pdata->name = "mv64x60_cpu_err"; + edac_dev->dev = &pdev->dev; + platform_set_drvdata(pdev, edac_dev); + edac_dev->dev_name = dev_name(&pdev->dev); + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) { + printk(KERN_ERR "%s: Unable to get resource for " + "CPU err regs\n", __func__); + res = -ENOENT; + goto err; + } + + if (!devm_request_mem_region(&pdev->dev, + r->start, + resource_size(r), + pdata->name)) { + printk(KERN_ERR "%s: Error while requesting mem region\n", + __func__); + res = -EBUSY; + goto err; + } + + pdata->cpu_vbase[0] = devm_ioremap(&pdev->dev, + r->start, + resource_size(r)); + if (!pdata->cpu_vbase[0]) { + printk(KERN_ERR "%s: Unable to setup CPU err regs\n", __func__); + res = -ENOMEM; + goto err; + } + + r = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!r) { + printk(KERN_ERR "%s: Unable to get resource for " + "CPU err regs\n", __func__); + res = -ENOENT; + goto err; + } + + if (!devm_request_mem_region(&pdev->dev, + r->start, + resource_size(r), + pdata->name)) { + printk(KERN_ERR "%s: Error while requesting mem region\n", + __func__); + res = -EBUSY; + goto err; + } + + pdata->cpu_vbase[1] = devm_ioremap(&pdev->dev, + r->start, + resource_size(r)); + if (!pdata->cpu_vbase[1]) { + printk(KERN_ERR "%s: Unable to setup CPU err regs\n", __func__); + res = -ENOMEM; + goto err; + } + + /* setup CPU err registers */ + writel(0, pdata->cpu_vbase[1] + MV64x60_CPU_ERR_CAUSE); + writel(0, pdata->cpu_vbase[1] + MV64x60_CPU_ERR_MASK); + writel(0x000000ff, pdata->cpu_vbase[1] + MV64x60_CPU_ERR_MASK); + + edac_dev->mod_name = EDAC_MOD_STR; + edac_dev->ctl_name = pdata->name; + if (edac_op_state == EDAC_OPSTATE_POLL) + edac_dev->edac_check = mv64x60_cpu_check; + + pdata->edac_idx = edac_dev_idx++; + + if (edac_device_add_device(edac_dev) > 0) { + edac_dbg(3, "failed edac_device_add_device()\n"); + goto err; + } + + if (edac_op_state == EDAC_OPSTATE_INT) { + pdata->irq = platform_get_irq(pdev, 0); + res = devm_request_irq(&pdev->dev, + pdata->irq, + mv64x60_cpu_isr, + 0, + "[EDAC] CPU err", + edac_dev); + if (res < 0) { + printk(KERN_ERR + "%s: Unable to request irq %d for MV64x60 " + "CPU ERR\n", __func__, pdata->irq); + res = -ENODEV; + goto err2; + } + + printk(KERN_INFO EDAC_MOD_STR + " acquired irq %d for CPU Err\n", pdata->irq); + } + + devres_remove_group(&pdev->dev, mv64x60_cpu_err_probe); + + /* get this far and it's successful */ + edac_dbg(3, "success\n"); + + return 0; + +err2: + edac_device_del_device(&pdev->dev); +err: + devres_release_group(&pdev->dev, mv64x60_cpu_err_probe); + edac_device_free_ctl_info(edac_dev); + return res; +} + +static int mv64x60_cpu_err_remove(struct platform_device *pdev) +{ + struct edac_device_ctl_info *edac_dev = platform_get_drvdata(pdev); + + edac_dbg(0, "\n"); + + edac_device_del_device(&pdev->dev); + edac_device_free_ctl_info(edac_dev); + return 0; +} + +static struct platform_driver mv64x60_cpu_err_driver = { + .probe = mv64x60_cpu_err_probe, + .remove = mv64x60_cpu_err_remove, + .driver = { + .name = "mv64x60_cpu_err", + } +}; + +/*********************** DRAM err device **********************************/ + +static void mv64x60_mc_check(struct mem_ctl_info *mci) +{ + struct mv64x60_mc_pdata *pdata = mci->pvt_info; + u32 reg; + u32 err_addr; + u32 sdram_ecc; + u32 comp_ecc; + u32 syndrome; + + reg = readl(pdata->mc_vbase + MV64X60_SDRAM_ERR_ADDR); + if (!reg) + return; + + err_addr = reg & ~0x3; + sdram_ecc = readl(pdata->mc_vbase + MV64X60_SDRAM_ERR_ECC_RCVD); + comp_ecc = readl(pdata->mc_vbase + MV64X60_SDRAM_ERR_ECC_CALC); + syndrome = sdram_ecc ^ comp_ecc; + + /* first bit clear in ECC Err Reg, 1 bit error, correctable by HW */ + if (!(reg & 0x1)) + edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, + err_addr >> PAGE_SHIFT, + err_addr & PAGE_MASK, syndrome, + 0, 0, -1, + mci->ctl_name, ""); + else /* 2 bit error, UE */ + edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, + err_addr >> PAGE_SHIFT, + err_addr & PAGE_MASK, 0, + 0, 0, -1, + mci->ctl_name, ""); + + /* clear the error */ + writel(0, pdata->mc_vbase + MV64X60_SDRAM_ERR_ADDR); +} + +static irqreturn_t mv64x60_mc_isr(int irq, void *dev_id) +{ + struct mem_ctl_info *mci = dev_id; + struct mv64x60_mc_pdata *pdata = mci->pvt_info; + u32 reg; + + reg = readl(pdata->mc_vbase + MV64X60_SDRAM_ERR_ADDR); + if (!reg) + return IRQ_NONE; + + /* writing 0's to the ECC err addr in check function clears irq */ + mv64x60_mc_check(mci); + + return IRQ_HANDLED; +} + +static void get_total_mem(struct mv64x60_mc_pdata *pdata) +{ + struct device_node *np = NULL; + const unsigned int *reg; + + np = of_find_node_by_type(NULL, "memory"); + if (!np) + return; + + reg = of_get_property(np, "reg", NULL); + + pdata->total_mem = reg[1]; +} + +static void mv64x60_init_csrows(struct mem_ctl_info *mci, + struct mv64x60_mc_pdata *pdata) +{ + struct csrow_info *csrow; + struct dimm_info *dimm; + + u32 devtype; + u32 ctl; + + get_total_mem(pdata); + + ctl = readl(pdata->mc_vbase + MV64X60_SDRAM_CONFIG); + + csrow = mci->csrows[0]; + dimm = csrow->channels[0]->dimm; + + dimm->nr_pages = pdata->total_mem >> PAGE_SHIFT; + dimm->grain = 8; + + dimm->mtype = (ctl & MV64X60_SDRAM_REGISTERED) ? MEM_RDDR : MEM_DDR; + + devtype = (ctl >> 20) & 0x3; + switch (devtype) { + case 0x0: + dimm->dtype = DEV_X32; + break; + case 0x2: /* could be X8 too, but no way to tell */ + dimm->dtype = DEV_X16; + break; + case 0x3: + dimm->dtype = DEV_X4; + break; + default: + dimm->dtype = DEV_UNKNOWN; + break; + } + + dimm->edac_mode = EDAC_SECDED; +} + +static int mv64x60_mc_err_probe(struct platform_device *pdev) +{ + struct mem_ctl_info *mci; + struct edac_mc_layer layers[2]; + struct mv64x60_mc_pdata *pdata; + struct resource *r; + u32 ctl; + int res = 0; + + if (!devres_open_group(&pdev->dev, mv64x60_mc_err_probe, GFP_KERNEL)) + return -ENOMEM; + + layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; + layers[0].size = 1; + layers[0].is_virt_csrow = true; + layers[1].type = EDAC_MC_LAYER_CHANNEL; + layers[1].size = 1; + layers[1].is_virt_csrow = false; + mci = edac_mc_alloc(edac_mc_idx, ARRAY_SIZE(layers), layers, + sizeof(struct mv64x60_mc_pdata)); + if (!mci) { + printk(KERN_ERR "%s: No memory for CPU err\n", __func__); + devres_release_group(&pdev->dev, mv64x60_mc_err_probe); + return -ENOMEM; + } + + pdata = mci->pvt_info; + mci->pdev = &pdev->dev; + platform_set_drvdata(pdev, mci); + pdata->name = "mv64x60_mc_err"; + mci->dev_name = dev_name(&pdev->dev); + pdata->edac_idx = edac_mc_idx++; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) { + printk(KERN_ERR "%s: Unable to get resource for " + "MC err regs\n", __func__); + res = -ENOENT; + goto err; + } + + if (!devm_request_mem_region(&pdev->dev, + r->start, + resource_size(r), + pdata->name)) { + printk(KERN_ERR "%s: Error while requesting mem region\n", + __func__); + res = -EBUSY; + goto err; + } + + pdata->mc_vbase = devm_ioremap(&pdev->dev, + r->start, + resource_size(r)); + if (!pdata->mc_vbase) { + printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__); + res = -ENOMEM; + goto err; + } + + ctl = readl(pdata->mc_vbase + MV64X60_SDRAM_CONFIG); + if (!(ctl & MV64X60_SDRAM_ECC)) { + /* Non-ECC RAM? */ + printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__); + res = -ENODEV; + goto err; + } + + edac_dbg(3, "init mci\n"); + mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_DDR; + mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED; + mci->edac_cap = EDAC_FLAG_SECDED; + mci->mod_name = EDAC_MOD_STR; + mci->ctl_name = mv64x60_ctl_name; + + if (edac_op_state == EDAC_OPSTATE_POLL) + mci->edac_check = mv64x60_mc_check; + + mci->ctl_page_to_phys = NULL; + + mci->scrub_mode = SCRUB_SW_SRC; + + mv64x60_init_csrows(mci, pdata); + + /* setup MC registers */ + writel(0, pdata->mc_vbase + MV64X60_SDRAM_ERR_ADDR); + ctl = readl(pdata->mc_vbase + MV64X60_SDRAM_ERR_ECC_CNTL); + ctl = (ctl & 0xff00ffff) | 0x10000; + writel(ctl, pdata->mc_vbase + MV64X60_SDRAM_ERR_ECC_CNTL); + + res = edac_mc_add_mc(mci); + if (res) { + edac_dbg(3, "failed edac_mc_add_mc()\n"); + goto err; + } + + if (edac_op_state == EDAC_OPSTATE_INT) { + /* acquire interrupt that reports errors */ + pdata->irq = platform_get_irq(pdev, 0); + res = devm_request_irq(&pdev->dev, + pdata->irq, + mv64x60_mc_isr, + 0, + "[EDAC] MC err", + mci); + if (res < 0) { + printk(KERN_ERR "%s: Unable to request irq %d for " + "MV64x60 DRAM ERR\n", __func__, pdata->irq); + res = -ENODEV; + goto err2; + } + + printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC Err\n", + pdata->irq); + } + + /* get this far and it's successful */ + edac_dbg(3, "success\n"); + + return 0; + +err2: + edac_mc_del_mc(&pdev->dev); +err: + devres_release_group(&pdev->dev, mv64x60_mc_err_probe); + edac_mc_free(mci); + return res; +} + +static int mv64x60_mc_err_remove(struct platform_device *pdev) +{ + struct mem_ctl_info *mci = platform_get_drvdata(pdev); + + edac_dbg(0, "\n"); + + edac_mc_del_mc(&pdev->dev); + edac_mc_free(mci); + return 0; +} + +static struct platform_driver mv64x60_mc_err_driver = { + .probe = mv64x60_mc_err_probe, + .remove = mv64x60_mc_err_remove, + .driver = { + .name = "mv64x60_mc_err", + } +}; + +static struct platform_driver * const drivers[] = { + &mv64x60_mc_err_driver, + &mv64x60_cpu_err_driver, + &mv64x60_sram_err_driver, +#ifdef CONFIG_PCI + &mv64x60_pci_err_driver, +#endif +}; + +static int __init mv64x60_edac_init(void) +{ + + printk(KERN_INFO "Marvell MV64x60 EDAC driver " MV64x60_REVISION "\n"); + printk(KERN_INFO "\t(C) 2006-2007 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; + } + + return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); +} +module_init(mv64x60_edac_init); + +static void __exit mv64x60_edac_exit(void) +{ + platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); +} +module_exit(mv64x60_edac_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"); |