drivers/edac/altera_edac.c

Source file repositories/reference/linux-study-clean/drivers/edac/altera_edac.c

File Facts

System
Linux kernel
Corpus path
drivers/edac/altera_edac.c
Extension
.c
Size
62285 bytes
Lines
2226
Domain
Driver Families
Bucket
drivers/edac
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct file_operations altr_sdr_mc_debug_inject_fops = {
	.open = simple_open,
	.write = altr_sdr_mc_err_inject_write,
	.llseek = generic_file_llseek,
};

static void altr_sdr_mc_create_debugfs_nodes(struct mem_ctl_info *mci)
{
	if (!IS_ENABLED(CONFIG_EDAC_DEBUG))
		return;

	if (!mci->debugfs)
		return;

	edac_debugfs_create_file("altr_trigger", S_IWUSR, mci->debugfs, mci,
				 &altr_sdr_mc_debug_inject_fops);
}

/* Get total memory size from Open Firmware DTB */
static unsigned long get_total_mem(void)
{
	struct device_node *np = NULL;
	struct resource res;
	int ret;
	unsigned long total_mem = 0;

	for_each_node_by_type(np, "memory") {
		ret = of_address_to_resource(np, 0, &res);
		if (ret)
			continue;

		total_mem += resource_size(&res);
	}
	edac_dbg(0, "total_mem 0x%lx\n", total_mem);
	return total_mem;
}

static const struct of_device_id altr_sdram_ctrl_of_match[] = {
	{ .compatible = "altr,sdram-edac", .data = &c5_data},
	{ .compatible = "altr,sdram-edac-a10", .data = &a10_data},
	{},
};
MODULE_DEVICE_TABLE(of, altr_sdram_ctrl_of_match);

static int a10_init(struct regmap *mc_vbase)
{
	if (regmap_update_bits(mc_vbase, A10_INTMODE_OFST,
			       A10_INTMODE_SB_INT, A10_INTMODE_SB_INT)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Error setting SB IRQ mode\n");
		return -ENODEV;
	}

	if (regmap_write(mc_vbase, A10_SERRCNTREG_OFST, 1)) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Error setting trigger count\n");
		return -ENODEV;
	}

	return 0;
}

static int a10_unmask_irq(struct platform_device *pdev, u32 mask)
{
	void __iomem  *sm_base;
	int  ret = 0;

	if (!request_mem_region(A10_SYMAN_INTMASK_CLR, sizeof(u32),
				dev_name(&pdev->dev))) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Unable to request mem region\n");
		return -EBUSY;
	}

	sm_base = ioremap(A10_SYMAN_INTMASK_CLR, sizeof(u32));
	if (!sm_base) {
		edac_printk(KERN_ERR, EDAC_MC,
			    "Unable to ioremap device\n");

		ret = -ENOMEM;
		goto release;
	}

	iowrite32(mask, sm_base);

	iounmap(sm_base);

release:
	release_mem_region(A10_SYMAN_INTMASK_CLR, sizeof(u32));

Annotation

Implementation Notes