![Grant Likely](/assets/img/avatar_default.png)
This patch makes IRQ_DOMAIN usable on MIPS. It uses an ugly workaround to preserve current behaviour so that MIPS has time to add irq_domain registration to the irq controller drivers. The workaround will be removed in Linux v3.6 Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mips@linux-mips.org
794 lines
22 KiB
C
794 lines
22 KiB
C
#include <linux/debugfs.h>
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#include <linux/hardirq.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqdesc.h>
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#include <linux/irqdomain.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/smp.h>
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#include <linux/fs.h>
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#define IRQ_DOMAIN_MAP_LEGACY 0 /* driver allocated fixed range of irqs.
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* ie. legacy 8259, gets irqs 1..15 */
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#define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */
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#define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */
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#define IRQ_DOMAIN_MAP_TREE 3 /* radix tree */
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static LIST_HEAD(irq_domain_list);
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static DEFINE_MUTEX(irq_domain_mutex);
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static DEFINE_MUTEX(revmap_trees_mutex);
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static unsigned int irq_virq_count = NR_IRQS;
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static struct irq_domain *irq_default_domain;
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/**
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* irq_domain_alloc() - Allocate a new irq_domain data structure
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* @of_node: optional device-tree node of the interrupt controller
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* @revmap_type: type of reverse mapping to use
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* @ops: map/unmap domain callbacks
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* @host_data: Controller private data pointer
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*
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* Allocates and initialize and irq_domain structure. Caller is expected to
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* register allocated irq_domain with irq_domain_register(). Returns pointer
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* to IRQ domain, or NULL on failure.
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*/
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static struct irq_domain *irq_domain_alloc(struct device_node *of_node,
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unsigned int revmap_type,
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const struct irq_domain_ops *ops,
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void *host_data)
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{
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struct irq_domain *domain;
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domain = kzalloc(sizeof(*domain), GFP_KERNEL);
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if (WARN_ON(!domain))
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return NULL;
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/* Fill structure */
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domain->revmap_type = revmap_type;
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domain->ops = ops;
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domain->host_data = host_data;
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domain->of_node = of_node_get(of_node);
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return domain;
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}
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static void irq_domain_add(struct irq_domain *domain)
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{
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mutex_lock(&irq_domain_mutex);
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list_add(&domain->link, &irq_domain_list);
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mutex_unlock(&irq_domain_mutex);
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pr_debug("irq: Allocated domain of type %d @0x%p\n",
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domain->revmap_type, domain);
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}
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static unsigned int irq_domain_legacy_revmap(struct irq_domain *domain,
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irq_hw_number_t hwirq)
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{
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irq_hw_number_t first_hwirq = domain->revmap_data.legacy.first_hwirq;
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int size = domain->revmap_data.legacy.size;
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if (WARN_ON(hwirq < first_hwirq || hwirq >= first_hwirq + size))
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return 0;
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return hwirq - first_hwirq + domain->revmap_data.legacy.first_irq;
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}
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/**
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* irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
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* @of_node: pointer to interrupt controller's device tree node.
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* @size: total number of irqs in legacy mapping
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* @first_irq: first number of irq block assigned to the domain
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* @first_hwirq: first hwirq number to use for the translation. Should normally
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* be '0', but a positive integer can be used if the effective
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* hwirqs numbering does not begin at zero.
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* @ops: map/unmap domain callbacks
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* @host_data: Controller private data pointer
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*
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* Note: the map() callback will be called before this function returns
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* for all legacy interrupts except 0 (which is always the invalid irq for
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* a legacy controller).
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*/
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struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
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unsigned int size,
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unsigned int first_irq,
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irq_hw_number_t first_hwirq,
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const struct irq_domain_ops *ops,
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void *host_data)
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{
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struct irq_domain *domain;
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unsigned int i;
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domain = irq_domain_alloc(of_node, IRQ_DOMAIN_MAP_LEGACY, ops, host_data);
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if (!domain)
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return NULL;
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domain->revmap_data.legacy.first_irq = first_irq;
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domain->revmap_data.legacy.first_hwirq = first_hwirq;
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domain->revmap_data.legacy.size = size;
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mutex_lock(&irq_domain_mutex);
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/* Verify that all the irqs are available */
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for (i = 0; i < size; i++) {
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int irq = first_irq + i;
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struct irq_data *irq_data = irq_get_irq_data(irq);
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if (WARN_ON(!irq_data || irq_data->domain)) {
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mutex_unlock(&irq_domain_mutex);
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of_node_put(domain->of_node);
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kfree(domain);
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return NULL;
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}
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}
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/* Claim all of the irqs before registering a legacy domain */
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for (i = 0; i < size; i++) {
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struct irq_data *irq_data = irq_get_irq_data(first_irq + i);
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irq_data->hwirq = first_hwirq + i;
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irq_data->domain = domain;
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}
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mutex_unlock(&irq_domain_mutex);
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for (i = 0; i < size; i++) {
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int irq = first_irq + i;
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int hwirq = first_hwirq + i;
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/* IRQ0 gets ignored */
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if (!irq)
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continue;
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/* Legacy flags are left to default at this point,
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* one can then use irq_create_mapping() to
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* explicitly change them
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*/
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ops->map(domain, irq, hwirq);
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/* Clear norequest flags */
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irq_clear_status_flags(irq, IRQ_NOREQUEST);
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}
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irq_domain_add(domain);
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return domain;
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}
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/**
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* irq_domain_add_linear() - Allocate and register a legacy revmap irq_domain.
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* @of_node: pointer to interrupt controller's device tree node.
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* @ops: map/unmap domain callbacks
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* @host_data: Controller private data pointer
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*/
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struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
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unsigned int size,
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const struct irq_domain_ops *ops,
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void *host_data)
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{
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struct irq_domain *domain;
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unsigned int *revmap;
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revmap = kzalloc(sizeof(*revmap) * size, GFP_KERNEL);
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if (WARN_ON(!revmap))
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return NULL;
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domain = irq_domain_alloc(of_node, IRQ_DOMAIN_MAP_LINEAR, ops, host_data);
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if (!domain) {
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kfree(revmap);
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return NULL;
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}
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domain->revmap_data.linear.size = size;
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domain->revmap_data.linear.revmap = revmap;
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irq_domain_add(domain);
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return domain;
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}
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struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
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const struct irq_domain_ops *ops,
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void *host_data)
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{
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struct irq_domain *domain = irq_domain_alloc(of_node,
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IRQ_DOMAIN_MAP_NOMAP, ops, host_data);
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if (domain)
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irq_domain_add(domain);
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return domain;
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}
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/**
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* irq_domain_add_tree()
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* @of_node: pointer to interrupt controller's device tree node.
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* @ops: map/unmap domain callbacks
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*
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* Note: The radix tree will be allocated later during boot automatically
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* (the reverse mapping will use the slow path until that happens).
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*/
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struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
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const struct irq_domain_ops *ops,
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void *host_data)
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{
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struct irq_domain *domain = irq_domain_alloc(of_node,
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IRQ_DOMAIN_MAP_TREE, ops, host_data);
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if (domain) {
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INIT_RADIX_TREE(&domain->revmap_data.tree, GFP_KERNEL);
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irq_domain_add(domain);
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}
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return domain;
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}
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/**
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* irq_find_host() - Locates a domain for a given device node
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* @node: device-tree node of the interrupt controller
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*/
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struct irq_domain *irq_find_host(struct device_node *node)
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{
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struct irq_domain *h, *found = NULL;
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int rc;
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/* We might want to match the legacy controller last since
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* it might potentially be set to match all interrupts in
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* the absence of a device node. This isn't a problem so far
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* yet though...
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*/
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mutex_lock(&irq_domain_mutex);
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list_for_each_entry(h, &irq_domain_list, link) {
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if (h->ops->match)
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rc = h->ops->match(h, node);
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else
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rc = (h->of_node != NULL) && (h->of_node == node);
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if (rc) {
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found = h;
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break;
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}
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}
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mutex_unlock(&irq_domain_mutex);
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return found;
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}
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EXPORT_SYMBOL_GPL(irq_find_host);
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/**
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* irq_set_default_host() - Set a "default" irq domain
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* @domain: default domain pointer
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*
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* For convenience, it's possible to set a "default" domain that will be used
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* whenever NULL is passed to irq_create_mapping(). It makes life easier for
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* platforms that want to manipulate a few hard coded interrupt numbers that
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* aren't properly represented in the device-tree.
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*/
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void irq_set_default_host(struct irq_domain *domain)
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{
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pr_debug("irq: Default domain set to @0x%p\n", domain);
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irq_default_domain = domain;
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}
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/**
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* irq_set_virq_count() - Set the maximum number of linux irqs
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* @count: number of linux irqs, capped with NR_IRQS
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*
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* This is mainly for use by platforms like iSeries who want to program
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* the virtual irq number in the controller to avoid the reverse mapping
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*/
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void irq_set_virq_count(unsigned int count)
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{
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pr_debug("irq: Trying to set virq count to %d\n", count);
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BUG_ON(count < NUM_ISA_INTERRUPTS);
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if (count < NR_IRQS)
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irq_virq_count = count;
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}
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static int irq_setup_virq(struct irq_domain *domain, unsigned int virq,
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irq_hw_number_t hwirq)
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{
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struct irq_data *irq_data = irq_get_irq_data(virq);
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irq_data->hwirq = hwirq;
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irq_data->domain = domain;
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if (domain->ops->map(domain, virq, hwirq)) {
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pr_debug("irq: -> mapping failed, freeing\n");
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irq_data->domain = NULL;
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irq_data->hwirq = 0;
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return -1;
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}
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irq_clear_status_flags(virq, IRQ_NOREQUEST);
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return 0;
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}
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/**
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* irq_create_direct_mapping() - Allocate an irq for direct mapping
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* @domain: domain to allocate the irq for or NULL for default domain
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*
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* This routine is used for irq controllers which can choose the hardware
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* interrupt numbers they generate. In such a case it's simplest to use
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* the linux irq as the hardware interrupt number.
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*/
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unsigned int irq_create_direct_mapping(struct irq_domain *domain)
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{
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unsigned int virq;
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if (domain == NULL)
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domain = irq_default_domain;
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BUG_ON(domain == NULL);
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WARN_ON(domain->revmap_type != IRQ_DOMAIN_MAP_NOMAP);
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virq = irq_alloc_desc_from(1, 0);
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if (!virq) {
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pr_debug("irq: create_direct virq allocation failed\n");
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return 0;
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}
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if (virq >= irq_virq_count) {
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pr_err("ERROR: no free irqs available below %i maximum\n",
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irq_virq_count);
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irq_free_desc(virq);
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return 0;
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}
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pr_debug("irq: create_direct obtained virq %d\n", virq);
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if (irq_setup_virq(domain, virq, virq)) {
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irq_free_desc(virq);
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return 0;
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}
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return virq;
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}
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/**
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* irq_create_mapping() - Map a hardware interrupt into linux irq space
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* @domain: domain owning this hardware interrupt or NULL for default domain
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* @hwirq: hardware irq number in that domain space
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*
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* Only one mapping per hardware interrupt is permitted. Returns a linux
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* irq number.
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* If the sense/trigger is to be specified, set_irq_type() should be called
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* on the number returned from that call.
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*/
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unsigned int irq_create_mapping(struct irq_domain *domain,
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irq_hw_number_t hwirq)
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{
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unsigned int virq, hint;
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pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
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/* Look for default domain if nececssary */
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if (domain == NULL)
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domain = irq_default_domain;
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if (domain == NULL) {
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printk(KERN_WARNING "irq_create_mapping called for"
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" NULL domain, hwirq=%lx\n", hwirq);
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WARN_ON(1);
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return 0;
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}
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pr_debug("irq: -> using domain @%p\n", domain);
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/* Check if mapping already exists */
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virq = irq_find_mapping(domain, hwirq);
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if (virq) {
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pr_debug("irq: -> existing mapping on virq %d\n", virq);
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return virq;
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}
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/* Get a virtual interrupt number */
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if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
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return irq_domain_legacy_revmap(domain, hwirq);
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/* Allocate a virtual interrupt number */
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hint = hwirq % irq_virq_count;
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if (hint == 0)
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hint++;
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virq = irq_alloc_desc_from(hint, 0);
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if (!virq)
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virq = irq_alloc_desc_from(1, 0);
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if (!virq) {
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pr_debug("irq: -> virq allocation failed\n");
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return 0;
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}
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if (irq_setup_virq(domain, virq, hwirq)) {
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if (domain->revmap_type != IRQ_DOMAIN_MAP_LEGACY)
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irq_free_desc(virq);
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return 0;
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}
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pr_debug("irq: irq %lu on domain %s mapped to virtual irq %u\n",
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hwirq, domain->of_node ? domain->of_node->full_name : "null", virq);
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return virq;
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}
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EXPORT_SYMBOL_GPL(irq_create_mapping);
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unsigned int irq_create_of_mapping(struct device_node *controller,
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const u32 *intspec, unsigned int intsize)
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{
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struct irq_domain *domain;
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irq_hw_number_t hwirq;
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unsigned int type = IRQ_TYPE_NONE;
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unsigned int virq;
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domain = controller ? irq_find_host(controller) : irq_default_domain;
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if (!domain) {
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#ifdef CONFIG_MIPS
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/*
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* Workaround to avoid breaking interrupt controller drivers
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* that don't yet register an irq_domain. This is temporary
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* code. ~~~gcl, Feb 24, 2012
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*
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* Scheduled for removal in Linux v3.6. That should be enough
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* time.
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*/
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if (intsize > 0)
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return intspec[0];
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#endif
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printk(KERN_WARNING "irq: no irq domain found for %s !\n",
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controller->full_name);
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return 0;
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}
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/* If domain has no translation, then we assume interrupt line */
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if (domain->ops->xlate == NULL)
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hwirq = intspec[0];
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else {
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if (domain->ops->xlate(domain, controller, intspec, intsize,
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&hwirq, &type))
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return 0;
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}
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/* Create mapping */
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virq = irq_create_mapping(domain, hwirq);
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if (!virq)
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return virq;
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/* Set type if specified and different than the current one */
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if (type != IRQ_TYPE_NONE &&
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type != (irqd_get_trigger_type(irq_get_irq_data(virq))))
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irq_set_irq_type(virq, type);
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return virq;
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}
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EXPORT_SYMBOL_GPL(irq_create_of_mapping);
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/**
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* irq_dispose_mapping() - Unmap an interrupt
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* @virq: linux irq number of the interrupt to unmap
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*/
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void irq_dispose_mapping(unsigned int virq)
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{
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struct irq_data *irq_data = irq_get_irq_data(virq);
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struct irq_domain *domain;
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irq_hw_number_t hwirq;
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if (!virq || !irq_data)
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return;
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domain = irq_data->domain;
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if (WARN_ON(domain == NULL))
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return;
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/* Never unmap legacy interrupts */
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if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
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return;
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irq_set_status_flags(virq, IRQ_NOREQUEST);
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/* remove chip and handler */
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irq_set_chip_and_handler(virq, NULL, NULL);
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/* Make sure it's completed */
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synchronize_irq(virq);
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/* Tell the PIC about it */
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if (domain->ops->unmap)
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domain->ops->unmap(domain, virq);
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smp_mb();
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/* Clear reverse map */
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hwirq = irq_data->hwirq;
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switch(domain->revmap_type) {
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case IRQ_DOMAIN_MAP_LINEAR:
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if (hwirq < domain->revmap_data.linear.size)
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domain->revmap_data.linear.revmap[hwirq] = 0;
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break;
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case IRQ_DOMAIN_MAP_TREE:
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mutex_lock(&revmap_trees_mutex);
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radix_tree_delete(&domain->revmap_data.tree, hwirq);
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mutex_unlock(&revmap_trees_mutex);
|
|
break;
|
|
}
|
|
|
|
irq_free_desc(virq);
|
|
}
|
|
EXPORT_SYMBOL_GPL(irq_dispose_mapping);
|
|
|
|
/**
|
|
* irq_find_mapping() - Find a linux irq from an hw irq number.
|
|
* @domain: domain owning this hardware interrupt
|
|
* @hwirq: hardware irq number in that domain space
|
|
*
|
|
* This is a slow path, for use by generic code. It's expected that an
|
|
* irq controller implementation directly calls the appropriate low level
|
|
* mapping function.
|
|
*/
|
|
unsigned int irq_find_mapping(struct irq_domain *domain,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
unsigned int i;
|
|
unsigned int hint = hwirq % irq_virq_count;
|
|
|
|
/* Look for default domain if nececssary */
|
|
if (domain == NULL)
|
|
domain = irq_default_domain;
|
|
if (domain == NULL)
|
|
return 0;
|
|
|
|
/* legacy -> bail early */
|
|
if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
|
|
return irq_domain_legacy_revmap(domain, hwirq);
|
|
|
|
/* Slow path does a linear search of the map */
|
|
if (hint == 0)
|
|
hint = 1;
|
|
i = hint;
|
|
do {
|
|
struct irq_data *data = irq_get_irq_data(i);
|
|
if (data && (data->domain == domain) && (data->hwirq == hwirq))
|
|
return i;
|
|
i++;
|
|
if (i >= irq_virq_count)
|
|
i = 1;
|
|
} while(i != hint);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(irq_find_mapping);
|
|
|
|
/**
|
|
* irq_radix_revmap_lookup() - Find a linux irq from a hw irq number.
|
|
* @domain: domain owning this hardware interrupt
|
|
* @hwirq: hardware irq number in that domain space
|
|
*
|
|
* This is a fast path, for use by irq controller code that uses radix tree
|
|
* revmaps
|
|
*/
|
|
unsigned int irq_radix_revmap_lookup(struct irq_domain *domain,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
struct irq_data *irq_data;
|
|
|
|
if (WARN_ON_ONCE(domain->revmap_type != IRQ_DOMAIN_MAP_TREE))
|
|
return irq_find_mapping(domain, hwirq);
|
|
|
|
/*
|
|
* Freeing an irq can delete nodes along the path to
|
|
* do the lookup via call_rcu.
|
|
*/
|
|
rcu_read_lock();
|
|
irq_data = radix_tree_lookup(&domain->revmap_data.tree, hwirq);
|
|
rcu_read_unlock();
|
|
|
|
/*
|
|
* If found in radix tree, then fine.
|
|
* Else fallback to linear lookup - this should not happen in practice
|
|
* as it means that we failed to insert the node in the radix tree.
|
|
*/
|
|
return irq_data ? irq_data->irq : irq_find_mapping(domain, hwirq);
|
|
}
|
|
|
|
/**
|
|
* irq_radix_revmap_insert() - Insert a hw irq to linux irq number mapping.
|
|
* @domain: domain owning this hardware interrupt
|
|
* @virq: linux irq number
|
|
* @hwirq: hardware irq number in that domain space
|
|
*
|
|
* This is for use by irq controllers that use a radix tree reverse
|
|
* mapping for fast lookup.
|
|
*/
|
|
void irq_radix_revmap_insert(struct irq_domain *domain, unsigned int virq,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
struct irq_data *irq_data = irq_get_irq_data(virq);
|
|
|
|
if (WARN_ON(domain->revmap_type != IRQ_DOMAIN_MAP_TREE))
|
|
return;
|
|
|
|
if (virq) {
|
|
mutex_lock(&revmap_trees_mutex);
|
|
radix_tree_insert(&domain->revmap_data.tree, hwirq, irq_data);
|
|
mutex_unlock(&revmap_trees_mutex);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* irq_linear_revmap() - Find a linux irq from a hw irq number.
|
|
* @domain: domain owning this hardware interrupt
|
|
* @hwirq: hardware irq number in that domain space
|
|
*
|
|
* This is a fast path, for use by irq controller code that uses linear
|
|
* revmaps. It does fallback to the slow path if the revmap doesn't exist
|
|
* yet and will create the revmap entry with appropriate locking
|
|
*/
|
|
unsigned int irq_linear_revmap(struct irq_domain *domain,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
unsigned int *revmap;
|
|
|
|
if (WARN_ON_ONCE(domain->revmap_type != IRQ_DOMAIN_MAP_LINEAR))
|
|
return irq_find_mapping(domain, hwirq);
|
|
|
|
/* Check revmap bounds */
|
|
if (unlikely(hwirq >= domain->revmap_data.linear.size))
|
|
return irq_find_mapping(domain, hwirq);
|
|
|
|
/* Check if revmap was allocated */
|
|
revmap = domain->revmap_data.linear.revmap;
|
|
if (unlikely(revmap == NULL))
|
|
return irq_find_mapping(domain, hwirq);
|
|
|
|
/* Fill up revmap with slow path if no mapping found */
|
|
if (unlikely(!revmap[hwirq]))
|
|
revmap[hwirq] = irq_find_mapping(domain, hwirq);
|
|
|
|
return revmap[hwirq];
|
|
}
|
|
|
|
#ifdef CONFIG_VIRQ_DEBUG
|
|
static int virq_debug_show(struct seq_file *m, void *private)
|
|
{
|
|
unsigned long flags;
|
|
struct irq_desc *desc;
|
|
const char *p;
|
|
static const char none[] = "none";
|
|
void *data;
|
|
int i;
|
|
|
|
seq_printf(m, "%-5s %-7s %-15s %-18s %s\n", "virq", "hwirq",
|
|
"chip name", "chip data", "domain name");
|
|
|
|
for (i = 1; i < nr_irqs; i++) {
|
|
desc = irq_to_desc(i);
|
|
if (!desc)
|
|
continue;
|
|
|
|
raw_spin_lock_irqsave(&desc->lock, flags);
|
|
|
|
if (desc->action && desc->action->handler) {
|
|
struct irq_chip *chip;
|
|
|
|
seq_printf(m, "%5d ", i);
|
|
seq_printf(m, "0x%05lx ", desc->irq_data.hwirq);
|
|
|
|
chip = irq_desc_get_chip(desc);
|
|
if (chip && chip->name)
|
|
p = chip->name;
|
|
else
|
|
p = none;
|
|
seq_printf(m, "%-15s ", p);
|
|
|
|
data = irq_desc_get_chip_data(desc);
|
|
seq_printf(m, "0x%16p ", data);
|
|
|
|
if (desc->irq_data.domain->of_node)
|
|
p = desc->irq_data.domain->of_node->full_name;
|
|
else
|
|
p = none;
|
|
seq_printf(m, "%s\n", p);
|
|
}
|
|
|
|
raw_spin_unlock_irqrestore(&desc->lock, flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int virq_debug_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, virq_debug_show, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations virq_debug_fops = {
|
|
.open = virq_debug_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int __init irq_debugfs_init(void)
|
|
{
|
|
if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root,
|
|
NULL, &virq_debug_fops) == NULL)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
__initcall(irq_debugfs_init);
|
|
#endif /* CONFIG_VIRQ_DEBUG */
|
|
|
|
int irq_domain_simple_map(struct irq_domain *d, unsigned int irq,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
|
|
*
|
|
* Device Tree IRQ specifier translation function which works with one cell
|
|
* bindings where the cell value maps directly to the hwirq number.
|
|
*/
|
|
int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
|
|
const u32 *intspec, unsigned int intsize,
|
|
unsigned long *out_hwirq, unsigned int *out_type)
|
|
{
|
|
if (WARN_ON(intsize < 1))
|
|
return -EINVAL;
|
|
*out_hwirq = intspec[0];
|
|
*out_type = IRQ_TYPE_NONE;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
|
|
|
|
/**
|
|
* irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
|
|
*
|
|
* Device Tree IRQ specifier translation function which works with two cell
|
|
* bindings where the cell values map directly to the hwirq number
|
|
* and linux irq flags.
|
|
*/
|
|
int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
|
|
const u32 *intspec, unsigned int intsize,
|
|
irq_hw_number_t *out_hwirq, unsigned int *out_type)
|
|
{
|
|
if (WARN_ON(intsize < 2))
|
|
return -EINVAL;
|
|
*out_hwirq = intspec[0];
|
|
*out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
|
|
|
|
/**
|
|
* irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
|
|
*
|
|
* Device Tree IRQ specifier translation function which works with either one
|
|
* or two cell bindings where the cell values map directly to the hwirq number
|
|
* and linux irq flags.
|
|
*
|
|
* Note: don't use this function unless your interrupt controller explicitly
|
|
* supports both one and two cell bindings. For the majority of controllers
|
|
* the _onecell() or _twocell() variants above should be used.
|
|
*/
|
|
int irq_domain_xlate_onetwocell(struct irq_domain *d,
|
|
struct device_node *ctrlr,
|
|
const u32 *intspec, unsigned int intsize,
|
|
unsigned long *out_hwirq, unsigned int *out_type)
|
|
{
|
|
if (WARN_ON(intsize < 1))
|
|
return -EINVAL;
|
|
*out_hwirq = intspec[0];
|
|
*out_type = (intsize > 1) ? intspec[1] : IRQ_TYPE_NONE;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
|
|
|
|
const struct irq_domain_ops irq_domain_simple_ops = {
|
|
.map = irq_domain_simple_map,
|
|
.xlate = irq_domain_xlate_onetwocell,
|
|
};
|
|
EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
|
|
|
|
#ifdef CONFIG_OF_IRQ
|
|
void irq_domain_generate_simple(const struct of_device_id *match,
|
|
u64 phys_base, unsigned int irq_start)
|
|
{
|
|
struct device_node *node;
|
|
pr_debug("looking for phys_base=%llx, irq_start=%i\n",
|
|
(unsigned long long) phys_base, (int) irq_start);
|
|
node = of_find_matching_node_by_address(NULL, match, phys_base);
|
|
if (node)
|
|
irq_domain_add_legacy(node, 32, irq_start, 0,
|
|
&irq_domain_simple_ops, NULL);
|
|
}
|
|
EXPORT_SYMBOL_GPL(irq_domain_generate_simple);
|
|
#endif
|