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kernel-fxtec-pro1x/include/linux/of_irq.h

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of/irq: Move irq_of_parse_and_map() to common code Merge common code between PowerPC and Microblaze. SPARC implements irq_of_parse_and_map(), but the implementation is different, so it does not use this code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michal Simek <monstr@monstr.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
2010-06-18 11:09:59 -06:00
#ifndef __OF_IRQ_H
#define __OF_IRQ_H
#if defined(CONFIG_OF)
struct of_irq;
#include <linux/types.h>
of/irq: merge irq mapping code Merge common irq mapping code between PowerPC and Microblaze. This patch merges of_irq_find_parent(), of_irq_map_raw() and of_irq_map_one(). The functions are dependent on one another, so all three are merged in a single patch. Other than cosmetic difference (ie. DBG() vs. pr_debug()), the implementations are identical. of_irq_to_resource() is also merged, but in this case the implementations are different. This patch drops the microblaze version and uses the powerpc implementation unchanged. The microblaze version essentially open-coded irq_of_parse_and_map() which it does not need to do. Therefore the powerpc version is safe to adopt. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au>
2010-06-08 07:48:06 -06:00
#include <linux/errno.h>
of/irq: of_irq.c needs to include linux/irq.h It works on current architectures simply because asm/prom.h includes it, but it broke when x86 turned on CONFIG_OF. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-21 11:34:55 -06:00
#include <linux/irq.h>
of/irq: merge irq mapping code Merge common irq mapping code between PowerPC and Microblaze. This patch merges of_irq_find_parent(), of_irq_map_raw() and of_irq_map_one(). The functions are dependent on one another, so all three are merged in a single patch. Other than cosmetic difference (ie. DBG() vs. pr_debug()), the implementations are identical. of_irq_to_resource() is also merged, but in this case the implementations are different. This patch drops the microblaze version and uses the powerpc implementation unchanged. The microblaze version essentially open-coded irq_of_parse_and_map() which it does not need to do. Therefore the powerpc version is safe to adopt. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au>
2010-06-08 07:48:06 -06:00
#include <linux/ioport.h>
of/irq: Move irq_of_parse_and_map() to common code Merge common code between PowerPC and Microblaze. SPARC implements irq_of_parse_and_map(), but the implementation is different, so it does not use this code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michal Simek <monstr@monstr.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
2010-06-18 11:09:59 -06:00
#include <linux/of.h>
/*
* irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
* implements it differently. However, the prototype is the same for all,
* so declare it here regardless of the CONFIG_OF_IRQ setting.
*/
extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
#if defined(CONFIG_OF_IRQ)
/**
* of_irq - container for device_node/irq_specifier pair for an irq controller
* @controller: pointer to interrupt controller device tree node
* @size: size of interrupt specifier
* @specifier: array of cells @size long specifing the specific interrupt
*
* This structure is returned when an interrupt is mapped. The controller
* field needs to be put() after use
*/
#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
struct of_irq {
struct device_node *controller; /* Interrupt controller node */
u32 size; /* Specifier size */
u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
};
of/irq: introduce of_irq_init of_irq_init will scan the devicetree for matching interrupt controller nodes. Then it calls an initialization function for each found controller in the proper order with parent nodes initialized before child nodes. Based on initial pseudo code from Grant Likely. Changes in v4: - Drop unnecessary empty list check - Be more verbose on errors - Simplify "if (!desc) WARN_ON(1)" to "if (WARN_ON(!desc))" Changes in v3: - add missing kfree's found by Jamie - Implement Grant's comments to simplify the init loop - fix function comments Changes in v2: - Complete re-write of list searching code from Grant Likely Signed-off-by: Rob Herring <rob.herring@calxeda.com> Reviewed-by: Jamie Iles <jamie@jamieiles.com> Tested-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-20 14:13:50 -06:00
typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
of/irq: merge irq mapping code Merge common irq mapping code between PowerPC and Microblaze. This patch merges of_irq_find_parent(), of_irq_map_raw() and of_irq_map_one(). The functions are dependent on one another, so all three are merged in a single patch. Other than cosmetic difference (ie. DBG() vs. pr_debug()), the implementations are identical. of_irq_to_resource() is also merged, but in this case the implementations are different. This patch drops the microblaze version and uses the powerpc implementation unchanged. The microblaze version essentially open-coded irq_of_parse_and_map() which it does not need to do. Therefore the powerpc version is safe to adopt. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au>
2010-06-08 07:48:06 -06:00
/*
* Workarounds only applied to 32bit powermac machines
*/
#define OF_IMAP_OLDWORLD_MAC 0x00000001
#define OF_IMAP_NO_PHANDLE 0x00000002
#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
extern unsigned int of_irq_workarounds;
extern struct device_node *of_irq_dflt_pic;
extern int of_irq_map_oldworld(struct device_node *device, int index,
struct of_irq *out_irq);
#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
#define of_irq_workarounds (0)
#define of_irq_dflt_pic (NULL)
static inline int of_irq_map_oldworld(struct device_node *device, int index,
struct of_irq *out_irq)
{
return -EINVAL;
}
#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
u32 ointsize, const u32 *addr,
struct of_irq *out_irq);
of/irq: Move irq_of_parse_and_map() to common code Merge common code between PowerPC and Microblaze. SPARC implements irq_of_parse_and_map(), but the implementation is different, so it does not use this code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michal Simek <monstr@monstr.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
2010-06-18 11:09:59 -06:00
extern int of_irq_map_one(struct device_node *device, int index,
struct of_irq *out_irq);
extern unsigned int irq_create_of_mapping(struct device_node *controller,
const u32 *intspec,
unsigned int intsize);
irq: add irq_domain translation infrastructure This patch adds irq_domain infrastructure for translating from hardware irq numbers to linux irqs. This is particularly important for architectures adding device tree support because the current implementation (excluding PowerPC and SPARC) cannot handle translation for more than a single interrupt controller. irq_domain supports device tree translation for any number of interrupt controllers. This patch converts x86, Microblaze, ARM and MIPS to use irq_domain for device tree irq translation. x86 is untested beyond compiling it, irq_domain is enabled for MIPS and Microblaze, but the old behaviour is preserved until the core code is modified to actually register an irq_domain yet. On ARM it works and is required for much of the new ARM device tree board support. PowerPC has /not/ been converted to use this new infrastructure. It is still missing some features before it can replace the virq infrastructure already in powerpc (see documentation on irq_domain_map/unmap for details). Followup patches will add the missing pieces and migrate PowerPC to use irq_domain. SPARC has its own method of managing interrupts from the device tree and is unaffected by this change. Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-26 03:19:06 -06:00
#ifdef CONFIG_IRQ_DOMAIN
extern void irq_dispose_mapping(unsigned int irq);
#endif
of/irq: merge irq mapping code Merge common irq mapping code between PowerPC and Microblaze. This patch merges of_irq_find_parent(), of_irq_map_raw() and of_irq_map_one(). The functions are dependent on one another, so all three are merged in a single patch. Other than cosmetic difference (ie. DBG() vs. pr_debug()), the implementations are identical. of_irq_to_resource() is also merged, but in this case the implementations are different. This patch drops the microblaze version and uses the powerpc implementation unchanged. The microblaze version essentially open-coded irq_of_parse_and_map() which it does not need to do. Therefore the powerpc version is safe to adopt. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au>
2010-06-08 07:48:06 -06:00
extern int of_irq_to_resource(struct device_node *dev, int index,
struct resource *r);
of/irq: remove references to NO_IRQ in drivers/of/platform.c Instead of referencing NO_IRQ in platform.c, define some helper functions in irq.c to call instead from platform.c. Keep NO_IRQ usage local to irq.c, and define NO_IRQ if not defined in headers. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-10 21:35:05 -06:00
extern int of_irq_count(struct device_node *dev);
extern int of_irq_to_resource_table(struct device_node *dev,
struct resource *res, int nr_irqs);
of: Export of_irq_find_parent() We have platform code that needs to find a node's interrupt parent, so export of_irq_find_parent() so we can use it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-04-14 16:31:57 -06:00
extern struct device_node *of_irq_find_parent(struct device_node *child);
of/irq: Move irq_of_parse_and_map() to common code Merge common code between PowerPC and Microblaze. SPARC implements irq_of_parse_and_map(), but the implementation is different, so it does not use this code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michal Simek <monstr@monstr.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
2010-06-18 11:09:59 -06:00
of/irq: introduce of_irq_init of_irq_init will scan the devicetree for matching interrupt controller nodes. Then it calls an initialization function for each found controller in the proper order with parent nodes initialized before child nodes. Based on initial pseudo code from Grant Likely. Changes in v4: - Drop unnecessary empty list check - Be more verbose on errors - Simplify "if (!desc) WARN_ON(1)" to "if (WARN_ON(!desc))" Changes in v3: - add missing kfree's found by Jamie - Implement Grant's comments to simplify the init loop - fix function comments Changes in v2: - Complete re-write of list searching code from Grant Likely Signed-off-by: Rob Herring <rob.herring@calxeda.com> Reviewed-by: Jamie Iles <jamie@jamieiles.com> Tested-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-20 14:13:50 -06:00
extern void of_irq_init(const struct of_device_id *matches);
irq: add irq_domain translation infrastructure This patch adds irq_domain infrastructure for translating from hardware irq numbers to linux irqs. This is particularly important for architectures adding device tree support because the current implementation (excluding PowerPC and SPARC) cannot handle translation for more than a single interrupt controller. irq_domain supports device tree translation for any number of interrupt controllers. This patch converts x86, Microblaze, ARM and MIPS to use irq_domain for device tree irq translation. x86 is untested beyond compiling it, irq_domain is enabled for MIPS and Microblaze, but the old behaviour is preserved until the core code is modified to actually register an irq_domain yet. On ARM it works and is required for much of the new ARM device tree board support. PowerPC has /not/ been converted to use this new infrastructure. It is still missing some features before it can replace the virq infrastructure already in powerpc (see documentation on irq_domain_map/unmap for details). Followup patches will add the missing pieces and migrate PowerPC to use irq_domain. SPARC has its own method of managing interrupts from the device tree and is unaffected by this change. Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-26 03:19:06 -06:00
of/irq: Move irq_of_parse_and_map() to common code Merge common code between PowerPC and Microblaze. SPARC implements irq_of_parse_and_map(), but the implementation is different, so it does not use this code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michal Simek <monstr@monstr.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
2010-06-18 11:09:59 -06:00
#endif /* CONFIG_OF_IRQ */
#endif /* CONFIG_OF */
#endif /* __OF_IRQ_H */
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