/**
* acpi_irq_parse_one_match - Handle a matching IRQ resource.
* @fwnode: matching fwnode
* @hwirq: hardware IRQ number
* @triggering: triggering attributes of hwirq
* @polarity: polarity attributes of hwirq
* @polarity: polarity attributes of hwirq
* @shareable: shareable attributes of hwirq
* @ctx: acpi_irq_parse_one_ctx updated by this function
*
* Description:
* Handle a matching IRQ resource by populating the given ctx with
* the information passed.
*/
static inline void acpi_irq_parse_one_match(struct fwnode_handle *fwnode,
u32 hwirq, u8 triggering,
u8 polarity, u8 shareable,
struct acpi_irq_parse_one_ctx *ctx)
{
if (!fwnode)
return;
ctx->rc = 0;
*ctx->res_flags = acpi_dev_irq_flags(triggering, polarity, shareable);
ctx->fwspec->fwnode = fwnode;
ctx->fwspec->param[0] = hwirq;
ctx->fwspec->param[1] = acpi_dev_get_irq_type(triggering, polarity);
ctx->fwspec->param_count = 2;
}
static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
unsigned int option_flags,
struct acpi_resource_irq *p)
{
int i;
pnp_irq_mask_t map;
unsigned char flags;
bitmap_zero(map.bits, PNP_IRQ_NR);
for (i = 0; i < p->interrupt_count; i++)
if (p->interrupts[i])
__set_bit(p->interrupts[i], map.bits);
flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable);
pnp_register_irq_resource(dev, option_flags, &map, flags);
}
static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
u8 triggering, u8 polarity, u8 shareable,
bool legacy)
{
int irq, p, t;
if (!valid_IRQ(gsi)) {
acpi_dev_irqresource_disabled(res, gsi);
return;
}
/*
* In IO-APIC mode, use overrided attribute. Two reasons:
* 1. BIOS bug in DSDT
* 2. BIOS uses IO-APIC mode Interrupt Source Override
*
* We do this only if we are dealing with IRQ() or IRQNoFlags()
* resource (the legacy ISA resources). With modern ACPI 5 devices
* using extended IRQ descriptors we take the IRQ configuration
* from _CRS directly.
*/
if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
if (triggering != trig || polarity != pol) {
pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi,
t ? "level" : "edge", p ? "low" : "high");
triggering = trig;
polarity = pol;
}
}
res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
if (irq >= 0) {
res->start = irq;
res->end = irq;
} else {
acpi_dev_irqresource_disabled(res, gsi);
}
}
static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
unsigned int option_flags,
struct acpi_resource_extended_irq *p)
{
int i;
pnp_irq_mask_t map;
unsigned char flags;
bitmap_zero(map.bits, PNP_IRQ_NR);
for (i = 0; i < p->interrupt_count; i++) {
if (p->interrupts[i]) {
if (p->interrupts[i] < PNP_IRQ_NR)
__set_bit(p->interrupts[i], map.bits);
else
dev_err(&dev->dev, "ignoring IRQ %d option "
"(too large for %d entry bitmap)\n",
p->interrupts[i], PNP_IRQ_NR);
}
}
flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable);
pnp_register_irq_resource(dev, option_flags, &map, flags);
}
static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
void *data)
{
struct pnp_dev *dev = data;
struct acpi_resource_dma *dma;
struct acpi_resource_vendor_typed *vendor_typed;
struct acpi_resource_gpio *gpio;
struct resource_win win = {{0}, 0};
struct resource *r = &win.res;
int i, flags;
if (acpi_dev_resource_address_space(res, &win)
|| acpi_dev_resource_ext_address_space(res, &win)) {
pnp_add_resource(dev, &win.res);
return AE_OK;
}
r->flags = 0;
if (acpi_dev_resource_interrupt(res, 0, r)) {
pnpacpi_add_irqresource(dev, r);
for (i = 1; acpi_dev_resource_interrupt(res, i, r); i++)
pnpacpi_add_irqresource(dev, r);
if (i > 1) {
/*
* The IRQ encoder puts a single interrupt in each
* descriptor, so if a _CRS descriptor has more than
* one interrupt, we won't be able to re-encode it.
*/
if (pnp_can_write(dev)) {
dev_warn(&dev->dev,
"multiple interrupts in _CRS descriptor; configuration can't be changed\n");
dev->capabilities &= ~PNP_WRITE;
}
}
return AE_OK;
} else if (acpi_gpio_get_irq_resource(res, &gpio)) {
/*
* If the resource is GpioInt() type then extract the IRQ
* from GPIO resource and fill it into IRQ resource type.
*/
i = acpi_dev_gpio_irq_get(dev->data, 0);
if (i >= 0) {
flags = acpi_dev_irq_flags(gpio->triggering,
gpio->polarity,
gpio->shareable);
} else {
flags = IORESOURCE_DISABLED;
}
pnp_add_irq_resource(dev, i, flags);
return AE_OK;
} else if (r->flags & IORESOURCE_DISABLED) {
pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
return AE_OK;
}
switch (res->type) {
case ACPI_RESOURCE_TYPE_MEMORY24:
case ACPI_RESOURCE_TYPE_MEMORY32:
case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
if (acpi_dev_resource_memory(res, r))
pnp_add_resource(dev, r);
break;
case ACPI_RESOURCE_TYPE_IO:
case ACPI_RESOURCE_TYPE_FIXED_IO:
if (acpi_dev_resource_io(res, r))
pnp_add_resource(dev, r);
break;
case ACPI_RESOURCE_TYPE_DMA:
dma = &res->data.dma;
if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
flags = dma_flags(dev, dma->type, dma->bus_master,
dma->transfer);
else
flags = IORESOURCE_DISABLED;
pnp_add_dma_resource(dev, dma->channels[0], flags);
break;
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
case ACPI_RESOURCE_TYPE_END_DEPENDENT:
break;
case ACPI_RESOURCE_TYPE_VENDOR:
vendor_typed = &res->data.vendor_typed;
pnpacpi_parse_allocated_vendor(dev, vendor_typed);
break;
case ACPI_RESOURCE_TYPE_END_TAG:
break;
case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
break;
case ACPI_RESOURCE_TYPE_SERIAL_BUS:
/* serial bus connections (I2C/SPI/UART) are not pnp */
break;
default:
dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
res->type);
return AE_ERROR;
}
return AE_OK;
}