diff options
Diffstat (limited to 'drivers/pnp/resource.c')
-rw-r--r-- | drivers/pnp/resource.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c index ff79aa6168c..786fd356916 100644 --- a/drivers/pnp/resource.c +++ b/drivers/pnp/resource.c @@ -624,6 +624,68 @@ struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev, return pnp_res; } +static int pnp_possible_option(struct pnp_option *option, int type, + resource_size_t start, resource_size_t size) +{ + struct pnp_option *tmp; + struct pnp_port *port; + struct pnp_mem *mem; + struct pnp_irq *irq; + struct pnp_dma *dma; + + if (!option) + return 0; + + for (tmp = option; tmp; tmp = tmp->next) { + switch (type) { + case IORESOURCE_IO: + for (port = tmp->port; port; port = port->next) { + if (port->min == start && port->size == size) + return 1; + } + break; + case IORESOURCE_MEM: + for (mem = tmp->mem; mem; mem = mem->next) { + if (mem->min == start && mem->size == size) + return 1; + } + break; + case IORESOURCE_IRQ: + for (irq = tmp->irq; irq; irq = irq->next) { + if (start < PNP_IRQ_NR && + test_bit(start, irq->map)) + return 1; + } + break; + case IORESOURCE_DMA: + for (dma = tmp->dma; dma; dma = dma->next) { + if (dma->map & (1 << start)) + return 1; + } + break; + } + } + + return 0; +} + +/* + * Determine whether the specified resource is a possible configuration + * for this device. + */ +int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start, + resource_size_t size) +{ + if (pnp_possible_option(dev->independent, type, start, size)) + return 1; + + if (pnp_possible_option(dev->dependent, type, start, size)) + return 1; + + return 0; +} +EXPORT_SYMBOL(pnp_possible_config); + /* format is: pnp_reserve_irq=irq1[,irq2] .... */ static int __init pnp_setup_reserve_irq(char *str) { |