提交 12e84142 编写于 作者: M Michal Simek
上级 406107da
/*
* Copyright (C) 2007-2008 Michal Simek <monstr@monstr.eu>
*
* based on PowerPC of_device.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef _ASM_MICROBLAZE_OF_DEVICE_H
#define _ASM_MICROBLAZE_OF_DEVICE_H
#ifdef __KERNEL__
#include <linux/device.h>
#include <linux/of.h>
/*
* The of_device is a kind of "base class" that is a superset of
* struct device for use by devices attached to an OF node and
* probed using OF properties.
*/
struct of_device {
struct device_node *node; /* to be obsoleted */
u64 dma_mask; /* DMA mask */
struct device dev; /* Generic device interface */
};
extern ssize_t of_device_get_modalias(struct of_device *ofdev,
char *str, ssize_t len);
extern struct of_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent);
extern int of_device_uevent(struct device *dev,
struct kobj_uevent_env *env);
extern void of_device_make_bus_id(struct of_device *dev);
/* This is just here during the transition */
#include <linux/of_device.h>
#endif /* __KERNEL__ */
#endif /* _ASM_MICROBLAZE_OF_DEVICE_H */
/*
* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
* <benh@kernel.crashing.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_MICROBLAZE_OF_PLATFORM_H
#define _ASM_MICROBLAZE_OF_PLATFORM_H
/* This is just here during the transition */
#include <linux/of_platform.h>
/*
* The list of OF IDs below is used for matching bus types in the
* system whose devices are to be exposed as of_platform_devices.
*
* This is the default list valid for most platforms. This file provides
* functions who can take an explicit list if necessary though
*
* The search is always performed recursively looking for children of
* the provided device_node and recursively if such a children matches
* a bus type in the list
*/
static const struct of_device_id of_default_bus_ids[] = {
{ .type = "soc", },
{ .compatible = "soc", },
{ .type = "plb5", },
{ .type = "plb4", },
{ .type = "opb", },
{ .type = "simple", },
{},
};
/* Platform drivers register/unregister */
static inline int of_register_platform_driver(struct of_platform_driver *drv)
{
return of_register_driver(drv, &of_platform_bus_type);
}
static inline void of_unregister_platform_driver(struct of_platform_driver *drv)
{
of_unregister_driver(drv);
}
/* Platform devices and busses creation */
extern struct of_device *of_platform_device_create(struct device_node *np,
const char *bus_id,
struct device *parent);
/* pseudo "matches" value to not do deep probe */
#define OF_NO_DEEP_PROBE ((struct of_device_id *)-1)
extern int of_platform_bus_probe(struct device_node *root,
const struct of_device_id *matches,
struct device *parent);
extern struct of_device *of_find_device_by_phandle(phandle ph);
extern void of_instantiate_rtc(void);
#endif /* _ASM_MICROBLAZE_OF_PLATFORM_H */
/*
* Definitions for talking to the Open Firmware PROM on
* Power Macintosh computers.
*
* Copyright (C) 1996-2005 Paul Mackerras.
*
* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_MICROBLAZE_PROM_H
#define _ASM_MICROBLAZE_PROM_H
#ifdef __KERNEL__
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/platform_device.h>
#include <asm/irq.h>
#include <asm/atomic.h>
#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
#define of_compat_cmp(s1, s2, l) strncasecmp((s1), (s2), (l))
#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
/* Definitions used by the flattened device tree */
#define OF_DT_HEADER 0xd00dfeed /* marker */
#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
#define OF_DT_END_NODE 0x2 /* End node */
#define OF_DT_PROP 0x3 /* Property: name off, size, content */
#define OF_DT_NOP 0x4 /* nop */
#define OF_DT_END 0x9
#define OF_DT_VERSION 0x10
/*
* This is what gets passed to the kernel by prom_init or kexec
*
* The dt struct contains the device tree structure, full pathes and
* property contents. The dt strings contain a separate block with just
* the strings for the property names, and is fully page aligned and
* self contained in a page, so that it can be kept around by the kernel,
* each property name appears only once in this page (cheap compression)
*
* the mem_rsvmap contains a map of reserved ranges of physical memory,
* passing it here instead of in the device-tree itself greatly simplifies
* the job of everybody. It's just a list of u64 pairs (base/size) that
* ends when size is 0
*/
struct boot_param_header {
u32 magic; /* magic word OF_DT_HEADER */
u32 totalsize; /* total size of DT block */
u32 off_dt_struct; /* offset to structure */
u32 off_dt_strings; /* offset to strings */
u32 off_mem_rsvmap; /* offset to memory reserve map */
u32 version; /* format version */
u32 last_comp_version; /* last compatible version */
/* version 2 fields below */
u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
/* version 3 fields below */
u32 dt_strings_size; /* size of the DT strings block */
/* version 17 fields below */
u32 dt_struct_size; /* size of the DT structure block */
};
typedef u32 phandle;
typedef u32 ihandle;
struct property {
char *name;
int length;
void *value;
struct property *next;
};
struct device_node {
const char *name;
const char *type;
phandle node;
phandle linux_phandle;
char *full_name;
struct property *properties;
struct property *deadprops; /* removed properties */
struct device_node *parent;
struct device_node *child;
struct device_node *sibling;
struct device_node *next; /* next device of same type */
struct device_node *allnext; /* next in list of all nodes */
struct proc_dir_entry *pde; /* this node's proc directory */
struct kref kref;
unsigned long _flags;
void *data;
};
extern struct device_node *of_chosen;
static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
{
return test_bit(flag, &n->_flags);
}
static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
{
set_bit(flag, &n->_flags);
}
#define HAVE_ARCH_DEVTREE_FIXUPS
static inline void set_node_proc_entry(struct device_node *dn,
struct proc_dir_entry *de)
{
dn->pde = de;
}
extern struct device_node *allnodes; /* temporary while merging */
extern rwlock_t devtree_lock; /* temporary while merging */
extern struct device_node *of_find_all_nodes(struct device_node *prev);
extern struct device_node *of_node_get(struct device_node *node);
extern void of_node_put(struct device_node *node);
/* For scanning the flat device-tree at boot time */
extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
const char *uname, int depth,
void *data),
void *data);
extern void *__init of_get_flat_dt_prop(unsigned long node, const char *name,
unsigned long *size);
extern int __init
of_flat_dt_is_compatible(unsigned long node, const char *name);
extern unsigned long __init of_get_flat_dt_root(void);
/* For updating the device tree at runtime */
extern void of_attach_node(struct device_node *);
extern void of_detach_node(struct device_node *);
/* Other Prototypes */
extern void finish_device_tree(void);
extern void unflatten_device_tree(void);
extern int early_uartlite_console(void);
extern void early_init_devtree(void *);
extern int machine_is_compatible(const char *compat);
extern void print_properties(struct device_node *node);
extern int prom_n_intr_cells(struct device_node *np);
extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
extern int prom_add_property(struct device_node *np, struct property *prop);
extern int prom_remove_property(struct device_node *np, struct property *prop);
extern int prom_update_property(struct device_node *np,
struct property *newprop,
struct property *oldprop);
extern struct resource *request_OF_resource(struct device_node *node,
int index, const char *name_postfix);
extern int release_OF_resource(struct device_node *node, int index);
/*
* OF address retreival & translation
*/
/* Helper to read a big number; size is in cells (not bytes) */
static inline u64 of_read_number(const u32 *cell, int size)
{
u64 r = 0;
while (size--)
r = (r << 32) | *(cell++);
return r;
}
/* Like of_read_number, but we want an unsigned long result */
#define of_read_ulong(cell, size) of_read_number(cell, size)
/* Translate an OF address block into a CPU physical address
*/
extern u64 of_translate_address(struct device_node *np, const u32 *addr);
/* Extract an address from a device, returns the region size and
* the address space flags too. The PCI version uses a BAR number
* instead of an absolute index
*/
extern const u32 *of_get_address(struct device_node *dev, int index,
u64 *size, unsigned int *flags);
extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
u64 *size, unsigned int *flags);
/* Get an address as a resource. Note that if your address is
* a PIO address, the conversion will fail if the physical address
* can't be internally converted to an IO token with
* pci_address_to_pio(), that is because it's either called to early
* or it can't be matched to any host bridge IO space
*/
extern int of_address_to_resource(struct device_node *dev, int index,
struct resource *r);
extern int of_pci_address_to_resource(struct device_node *dev, int bar,
struct resource *r);
/* Parse the ibm,dma-window property of an OF node into the busno, phys and
* size parameters.
*/
void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
unsigned long *busno, unsigned long *phys, unsigned long *size);
extern void kdump_move_device_tree(void);
/* CPU OF node matching */
struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
/* Get the MAC address */
extern const void *of_get_mac_address(struct device_node *np);
/*
* OF interrupt mapping
*/
/* 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_map_init - Initialize the irq remapper
* @flags: flags defining workarounds to enable
*
* Some machines have bugs in the device-tree which require certain workarounds
* to be applied. Call this before any interrupt mapping attempts to enable
* those workarounds.
*/
#define OF_IMAP_OLDWORLD_MAC 0x00000001
#define OF_IMAP_NO_PHANDLE 0x00000002
extern void of_irq_map_init(unsigned int flags);
/**
* of_irq_map_raw - Low level interrupt tree parsing
* @parent: the device interrupt parent
* @intspec: interrupt specifier ("interrupts" property of the device)
* @ointsize: size of the passed in interrupt specifier
* @addr: address specifier (start of "reg" property of the device)
* @out_irq: structure of_irq filled by this function
*
* Returns 0 on success and a negative number on error
*
* This function is a low-level interrupt tree walking function. It
* can be used to do a partial walk with synthetized reg and interrupts
* properties, for example when resolving PCI interrupts when no device
* node exist for the parent.
*
*/
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_map_one - Resolve an interrupt for a device
* @device: the device whose interrupt is to be resolved
* @index: index of the interrupt to resolve
* @out_irq: structure of_irq filled by this function
*
* This function resolves an interrupt, walking the tree, for a given
* device-tree node. It's the high level pendant to of_irq_map_raw().
* It also implements the workarounds for OldWolrd Macs.
*/
extern int of_irq_map_one(struct device_node *device, int index,
struct of_irq *out_irq);
/**
* of_irq_map_pci - Resolve the interrupt for a PCI device
* @pdev: the device whose interrupt is to be resolved
* @out_irq: structure of_irq filled by this function
*
* This function resolves the PCI interrupt for a given PCI device. If a
* device-node exists for a given pci_dev, it will use normal OF tree
* walking. If not, it will implement standard swizzling and walk up the
* PCI tree until an device-node is found, at which point it will finish
* resolving using the OF tree walking.
*/
struct pci_dev;
extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
extern int of_irq_to_resource(struct device_node *dev, int index,
struct resource *r);
/**
* of_iomap - Maps the memory mapped IO for a given device_node
* @device: the device whose io range will be mapped
* @index: index of the io range
*
* Returns a pointer to the mapped memory
*/
extern void __iomem *of_iomap(struct device_node *device, int index);
/*
* NB: This is here while we transition from using asm/prom.h
* to linux/of.h
*/
#include <linux/of.h>
#endif /* __KERNEL__ */
#endif /* _ASM_MICROBLAZE_PROM_H */
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <linux/errno.h>
void of_device_make_bus_id(struct of_device *dev)
{
static atomic_t bus_no_reg_magic;
struct device_node *node = dev->node;
char *name = dev->dev.bus_id;
const u32 *reg;
u64 addr;
int magic;
/*
* For MMIO, get the physical address
*/
reg = of_get_property(node, "reg", NULL);
if (reg) {
addr = of_translate_address(node, reg);
if (addr != OF_BAD_ADDR) {
snprintf(name, BUS_ID_SIZE,
"%llx.%s", (unsigned long long)addr,
node->name);
return;
}
}
/*
* No BusID, use the node name and add a globally incremented
* counter (and pray...)
*/
magic = atomic_add_return(1, &bus_no_reg_magic);
snprintf(name, BUS_ID_SIZE, "%s.%d", node->name, magic - 1);
}
EXPORT_SYMBOL(of_device_make_bus_id);
struct of_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent)
{
struct of_device *dev;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
dev->node = of_node_get(np);
dev->dev.dma_mask = &dev->dma_mask;
dev->dev.parent = parent;
dev->dev.release = of_release_dev;
dev->dev.archdata.of_node = np;
if (bus_id)
strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
else
of_device_make_bus_id(dev);
return dev;
}
EXPORT_SYMBOL(of_device_alloc);
int of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct of_device *ofdev;
const char *compat;
int seen = 0, cplen, sl;
if (!dev)
return -ENODEV;
ofdev = to_of_device(dev);
if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name))
return -ENOMEM;
if (add_uevent_var(env, "OF_TYPE=%s", ofdev->node->type))
return -ENOMEM;
/* Since the compatible field can contain pretty much anything
* it's not really legal to split it out with commas. We split it
* up using a number of environment variables instead. */
compat = of_get_property(ofdev->node, "compatible", &cplen);
while (compat && *compat && cplen > 0) {
if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat))
return -ENOMEM;
sl = strlen(compat) + 1;
compat += sl;
cplen -= sl;
seen++;
}
if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen))
return -ENOMEM;
/* modalias is trickier, we add it in 2 steps */
if (add_uevent_var(env, "MODALIAS="))
return -ENOMEM;
sl = of_device_get_modalias(ofdev, &env->buf[env->buflen-1],
sizeof(env->buf) - env->buflen);
if (sl >= (sizeof(env->buf) - env->buflen))
return -ENOMEM;
env->buflen += sl;
return 0;
}
EXPORT_SYMBOL(of_device_uevent);
/*
* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
* <benh@kernel.crashing.org>
* and Arnd Bergmann, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#undef DEBUG
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/errno.h>
#include <linux/topology.h>
#include <asm/atomic.h>
struct bus_type of_platform_bus_type = {
.uevent = of_device_uevent,
};
EXPORT_SYMBOL(of_platform_bus_type);
static int __init of_bus_driver_init(void)
{
return of_bus_type_init(&of_platform_bus_type, "of_platform");
}
postcore_initcall(of_bus_driver_init);
struct of_device *of_platform_device_create(struct device_node *np,
const char *bus_id,
struct device *parent)
{
struct of_device *dev;
dev = of_device_alloc(np, bus_id, parent);
if (!dev)
return NULL;
dev->dma_mask = 0xffffffffUL;
dev->dev.bus = &of_platform_bus_type;
/* We do not fill the DMA ops for platform devices by default.
* This is currently the responsibility of the platform code
* to do such, possibly using a device notifier
*/
if (of_device_register(dev) != 0) {
of_device_free(dev);
return NULL;
}
return dev;
}
EXPORT_SYMBOL(of_platform_device_create);
/**
* of_platform_bus_create - Create an OF device for a bus node and all its
* children. Optionally recursively instanciate matching busses.
* @bus: device node of the bus to instanciate
* @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to
* disallow recursive creation of child busses
*/
static int of_platform_bus_create(const struct device_node *bus,
const struct of_device_id *matches,
struct device *parent)
{
struct device_node *child;
struct of_device *dev;
int rc = 0;
for_each_child_of_node(bus, child) {
pr_debug(" create child: %s\n", child->full_name);
dev = of_platform_device_create(child, NULL, parent);
if (dev == NULL)
rc = -ENOMEM;
else if (!of_match_node(matches, child))
continue;
if (rc == 0) {
pr_debug(" and sub busses\n");
rc = of_platform_bus_create(child, matches, &dev->dev);
}
if (rc) {
of_node_put(child);
break;
}
}
return rc;
}
/**
* of_platform_bus_probe - Probe the device-tree for platform busses
* @root: parent of the first level to probe or NULL for the root of the tree
* @matches: match table, NULL to use the default
* @parent: parent to hook devices from, NULL for toplevel
*
* Note that children of the provided root are not instanciated as devices
* unless the specified root itself matches the bus list and is not NULL.
*/
int of_platform_bus_probe(struct device_node *root,
const struct of_device_id *matches,
struct device *parent)
{
struct device_node *child;
struct of_device *dev;
int rc = 0;
if (matches == NULL)
matches = of_default_bus_ids;
if (matches == OF_NO_DEEP_PROBE)
return -EINVAL;
if (root == NULL)
root = of_find_node_by_path("/");
else
of_node_get(root);
pr_debug("of_platform_bus_probe()\n");
pr_debug(" starting at: %s\n", root->full_name);
/* Do a self check of bus type, if there's a match, create
* children
*/
if (of_match_node(matches, root)) {
pr_debug(" root match, create all sub devices\n");
dev = of_platform_device_create(root, NULL, parent);
if (dev == NULL) {
rc = -ENOMEM;
goto bail;
}
pr_debug(" create all sub busses\n");
rc = of_platform_bus_create(root, matches, &dev->dev);
goto bail;
}
for_each_child_of_node(root, child) {
if (!of_match_node(matches, child))
continue;
pr_debug(" match: %s\n", child->full_name);
dev = of_platform_device_create(child, NULL, parent);
if (dev == NULL)
rc = -ENOMEM;
else
rc = of_platform_bus_create(child, matches, &dev->dev);
if (rc) {
of_node_put(child);
break;
}
}
bail:
of_node_put(root);
return rc;
}
EXPORT_SYMBOL(of_platform_bus_probe);
static int of_dev_node_match(struct device *dev, void *data)
{
return to_of_device(dev)->node == data;
}
struct of_device *of_find_device_by_node(struct device_node *np)
{
struct device *dev;
dev = bus_find_device(&of_platform_bus_type,
NULL, np, of_dev_node_match);
if (dev)
return to_of_device(dev);
return NULL;
}
EXPORT_SYMBOL(of_find_device_by_node);
static int of_dev_phandle_match(struct device *dev, void *data)
{
phandle *ph = data;
return to_of_device(dev)->node->linux_phandle == *ph;
}
struct of_device *of_find_device_by_phandle(phandle ph)
{
struct device *dev;
dev = bus_find_device(&of_platform_bus_type,
NULL, &ph, of_dev_phandle_match);
if (dev)
return to_of_device(dev);
return NULL;
}
EXPORT_SYMBOL(of_find_device_by_phandle);
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