drivers/sh/intc/handle.c

Source file repositories/reference/linux-study-clean/drivers/sh/intc/handle.c

File Facts

System
Linux kernel
Corpus path
drivers/sh/intc/handle.c
Extension
.c
Size
7013 bytes
Lines
307
Domain
Driver Families
Bucket
drivers/sh
Inferred role
Driver Families: implementation source
Status
source 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

if (mr->set_reg && mr->clr_reg) {
				fn = REG_FN_WRITE_BASE;
				mode = MODE_DUAL_REG;
				reg_e = mr->clr_reg;
				reg_d = mr->set_reg;
			} else {
				fn = REG_FN_MODIFY_BASE;
				if (mr->set_reg) {
					mode = MODE_ENABLE_REG;
					reg_e = mr->set_reg;
					reg_d = mr->set_reg;
				} else {
					mode = MODE_MASK_REG;
					reg_e = mr->clr_reg;
					reg_d = mr->clr_reg;
				}
			}

			fn += (mr->reg_width >> 3) - 1;
			return _INTC_MK(fn, mode,
					intc_get_reg(d, reg_e),
					intc_get_reg(d, reg_d),
					1,
					(mr->reg_width - 1) - *fld_idx);
		}

		*fld_idx = 0;
		(*reg_idx)++;
	}

	return 0;
}

unsigned int __init
intc_get_mask_handle(struct intc_desc *desc, struct intc_desc_int *d,
		     intc_enum enum_id, int do_grps)
{
	unsigned int i = 0;
	unsigned int j = 0;
	unsigned int ret;

	ret = _intc_mask_data(desc, d, enum_id, &i, &j);
	if (ret)
		return ret;

	if (do_grps)
		return intc_get_mask_handle(desc, d, intc_grp_id(desc, enum_id), 0);

	return 0;
}

static unsigned int __init _intc_prio_data(struct intc_desc *desc,
					   struct intc_desc_int *d,
					   intc_enum enum_id,
					   unsigned int *reg_idx,
					   unsigned int *fld_idx)
{
	struct intc_prio_reg *pr = desc->hw.prio_regs;
	unsigned int fn, n, mode, bit;
	unsigned long reg_e, reg_d;

	while (pr && enum_id && *reg_idx < desc->hw.nr_prio_regs) {
		pr = desc->hw.prio_regs + *reg_idx;

		for (; *fld_idx < ARRAY_SIZE(pr->enum_ids); (*fld_idx)++) {
			if (pr->enum_ids[*fld_idx] != enum_id)
				continue;

			if (pr->set_reg && pr->clr_reg) {
				fn = REG_FN_WRITE_BASE;
				mode = MODE_PCLR_REG;
				reg_e = pr->set_reg;
				reg_d = pr->clr_reg;
			} else {
				fn = REG_FN_MODIFY_BASE;
				mode = MODE_PRIO_REG;
				if (!pr->set_reg)
					BUG();
				reg_e = pr->set_reg;
				reg_d = pr->set_reg;
			}

			fn += (pr->reg_width >> 3) - 1;
			n = *fld_idx + 1;

			BUG_ON(n * pr->field_width > pr->reg_width);

			bit = pr->reg_width - (n * pr->field_width);

			return _INTC_MK(fn, mode,

Annotation

Implementation Notes