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    Subject[PATCH 06/58] microblaze_v5: Open firmware common files
    Date
    From: Michal Simek <monstr@monstr.eu>

    Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
    Signed-off-by: Michal Simek <monstr@monstr.eu>
    ---
    drivers/of/Makefile | 2 +-
    drivers/of/device.c | 128 ++++++
    drivers/of/platform.c | 175 ++++++++
    drivers/of/prom_parse.c | 1025 +++++++++++++++++++++++++++++++++++++++++++
    include/linux/of_device.h | 9 +
    include/linux/of_platform.h | 25 +
    6 files changed, 1363 insertions(+), 1 deletions(-)
    create mode 100644 drivers/of/prom_parse.c

    diff --git a/drivers/of/Makefile b/drivers/of/Makefile
    index 548772e..8d4961c 100644
    --- a/drivers/of/Makefile
    +++ b/drivers/of/Makefile
    @@ -1,4 +1,4 @@
    obj-y = base.o
    -obj-$(CONFIG_OF_DEVICE) += device.o platform.o
    +obj-$(CONFIG_OF_DEVICE) += device.o platform.o prom_parse.o
    obj-$(CONFIG_OF_GPIO) += gpio.o
    obj-$(CONFIG_OF_I2C) += of_i2c.o
    diff --git a/drivers/of/device.c b/drivers/of/device.c
    index 29681c4..ef735ee 100644
    --- a/drivers/of/device.c
    +++ b/drivers/of/device.c
    @@ -100,3 +100,131 @@ void of_device_unregister(struct of_device *ofdev)
    device_unregister(&ofdev->dev);
    }
    EXPORT_SYMBOL(of_device_unregister);
    +
    +
    +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;
    +#ifdef CONFIG_NUMA
    + dev->dev.archdata.numa_node = of_node_to_nid(np);
    +#endif
    +
    + 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);
    +
    +ssize_t of_device_get_modalias(struct of_device *ofdev,
    + char *str, ssize_t len)
    +{
    + const char *compat;
    + int cplen, i;
    + ssize_t tsize, csize, repend;
    +
    + /* Name & Type */
    + csize = snprintf(str, len, "of:N%sT%s",
    + ofdev->node->name, ofdev->node->type);
    +
    + /* Get compatible property if any */
    + compat = of_get_property(ofdev->node, "compatible", &cplen);
    + if (!compat)
    + return csize;
    +
    + /* Find true end (we tolerate multiple \0 at the end */
    + for (i = (cplen-1); i >= 0 && !compat[i]; i--)
    + cplen--;
    + if (!cplen)
    + return csize;
    + cplen++;
    +
    + /* Check space (need cplen+1 chars including final \0) */
    + tsize = csize + cplen;
    + repend = tsize;
    +
    + /* @ the limit, all is already filled */
    + if (csize >= len)
    + return tsize;
    +
    + /* limit compat list */
    + if (tsize >= len) {
    + cplen = len - csize - 1;
    + repend = len;
    + }
    +
    + /* Copy and do char replacement */
    + memcpy(&str[csize+1], compat, cplen);
    + for (i = csize; i < repend; i++) {
    + char c = str[i];
    + if (c == '\0')
    + str[i] = 'C';
    + else if (c == ' ')
    + str[i] = '_';
    + }
    +
    + return tsize;
    +}
    +EXPORT_SYMBOL(of_device_get_modalias);
    +
    +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);
    diff --git a/drivers/of/platform.c b/drivers/of/platform.c
    index ca09a63..06581e4 100644
    --- a/drivers/of/platform.c
    +++ b/drivers/of/platform.c
    @@ -17,6 +17,17 @@
    #include <linux/of_device.h>
    #include <linux/of_platform.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);
    +
    static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
    {
    struct of_device *of_dev = to_of_device(dev);
    @@ -125,3 +136,167 @@ void of_unregister_driver(struct of_platform_driver *drv)
    driver_unregister(&drv->driver);
    }
    EXPORT_SYMBOL(of_unregister_driver);
    +
    +
    +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);
    +
    diff --git a/drivers/of/prom_parse.c b/drivers/of/prom_parse.c
    new file mode 100644
    index 0000000..6d0d619
    --- /dev/null
    +++ b/drivers/of/prom_parse.c
    @@ -0,0 +1,1025 @@
    +#undef DEBUG
    +
    +#include <linux/kernel.h>
    +#include <linux/string.h>
    +#include <linux/pci_regs.h>
    +#include <linux/module.h>
    +#include <linux/ioport.h>
    +#include <linux/etherdevice.h>
    +#include <asm/prom.h>
    +#include <asm/pci-bridge.h>
    +
    +#define PRu64 "%llx"
    +
    +/* Max address size we deal with */
    +#define OF_MAX_ADDR_CELLS 4
    +#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
    + (ns) > 0)
    +
    +static struct of_bus *of_match_bus(struct device_node *np);
    +static int __of_address_to_resource(struct device_node *dev,
    + const u32 *addrp, u64 size, unsigned int flags,
    + struct resource *r);
    +
    +/* Debug utility */
    +#ifdef DEBUG
    +static void of_dump_addr(const char *s, const u32 *addr, int na)
    +{
    + printk("%s", s);
    + while (na--)
    + printk(KERN_INFO " %08x", *(addr++));
    + printk("\n");
    +}
    +#else
    +static void of_dump_addr(const char *s, const u32 *addr, int na) { }
    +#endif
    +
    +/* Callbacks for bus specific translators */
    +struct of_bus {
    + const char *name;
    + const char *addresses;
    + int (*match)(struct device_node *parent);
    + void (*count_cells)(struct device_node *child,
    + int *addrc, int *sizec);
    + u64 (*map)(u32 *addr, const u32 *range,
    + int na, int ns, int pna);
    + int (*translate)(u32 *addr, u64 offset, int na);
    + unsigned int (*get_flags)(const u32 *addr);
    +};
    +
    +/*
    + * Default translator (generic bus)
    + */
    +
    +static void of_bus_default_count_cells(struct device_node *dev,
    + int *addrc, int *sizec)
    +{
    + if (addrc)
    + *addrc = of_n_addr_cells(dev);
    + if (sizec)
    + *sizec = of_n_size_cells(dev);
    +}
    +
    +static u64 of_bus_default_map(u32 *addr, const u32 *range,
    + int na, int ns, int pna)
    +{
    + u64 cp, s, da;
    +
    + cp = of_read_number(range, na);
    + s = of_read_number(range + na + pna, ns);
    + da = of_read_number(addr, na);
    +
    + pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
    + cp, s, da);
    +
    + if (da < cp || da >= (cp + s))
    + return OF_BAD_ADDR;
    + return da - cp;
    +}
    +
    +static int of_bus_default_translate(u32 *addr, u64 offset, int na)
    +{
    + u64 a = of_read_number(addr, na);
    + memset(addr, 0, na * 4);
    + a += offset;
    + if (na > 1)
    + addr[na - 2] = a >> 32;
    + addr[na - 1] = a & 0xffffffffu;
    +
    + return 0;
    +}
    +
    +static unsigned int of_bus_default_get_flags(const u32 *addr)
    +{
    + return IORESOURCE_MEM;
    +}
    +
    +#ifdef CONFIG_PCI
    +/*
    + * PCI bus specific translator
    + */
    +
    +static int of_bus_pci_match(struct device_node *np)
    +{
    + /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
    + return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
    +}
    +
    +static void of_bus_pci_count_cells(struct device_node *np,
    + int *addrc, int *sizec)
    +{
    + if (addrc)
    + *addrc = 3;
    + if (sizec)
    + *sizec = 2;
    +}
    +
    +static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
    +{
    + u64 cp, s, da;
    +
    + /* Check address type match */
    + if ((addr[0] ^ range[0]) & 0x03000000)
    + return OF_BAD_ADDR;
    +
    + /* Read address values, skipping high cell */
    + cp = of_read_number(range + 1, na - 1);
    + s = of_read_number(range + na + pna, ns);
    + da = of_read_number(addr + 1, na - 1);
    +
    + pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
    +
    + if (da < cp || da >= (cp + s))
    + return OF_BAD_ADDR;
    + return da - cp;
    +}
    +
    +static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
    +{
    + return of_bus_default_translate(addr + 1, offset, na - 1);
    +}
    +
    +static unsigned int of_bus_pci_get_flags(const u32 *addr)
    +{
    + unsigned int flags = 0;
    + u32 w = addr[0];
    +
    + switch ((w >> 24) & 0x03) {
    + case 0x01:
    + flags |= IORESOURCE_IO;
    + break;
    + case 0x02: /* 32 bits */
    + case 0x03: /* 64 bits */
    + flags |= IORESOURCE_MEM;
    + break;
    + }
    + if (w & 0x40000000)
    + flags |= IORESOURCE_PREFETCH;
    + return flags;
    +}
    +
    +const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
    + unsigned int *flags)
    +{
    + const u32 *prop;
    + unsigned int psize;
    + struct device_node *parent;
    + struct of_bus *bus;
    + int onesize, i, na, ns;
    +
    + /* Get parent & match bus type */
    + parent = of_get_parent(dev);
    + if (parent == NULL)
    + return NULL;
    + bus = of_match_bus(parent);
    + if (strcmp(bus->name, "pci")) {
    + of_node_put(parent);
    + return NULL;
    + }
    + bus->count_cells(dev, &na, &ns);
    + of_node_put(parent);
    + if (!OF_CHECK_COUNTS(na, ns))
    + return NULL;
    +
    + /* Get "reg" or "assigned-addresses" property */
    + prop = of_get_property(dev, bus->addresses, &psize);
    + if (prop == NULL)
    + return NULL;
    + psize /= 4;
    +
    + onesize = na + ns;
    + for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
    + if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
    + if (size)
    + *size = of_read_number(prop + na, ns);
    + if (flags)
    + *flags = bus->get_flags(prop);
    + return prop;
    + }
    + return NULL;
    +}
    +EXPORT_SYMBOL(of_get_pci_address);
    +
    +int of_pci_address_to_resource(struct device_node *dev, int bar,
    + struct resource *r)
    +{
    + const u32 *addrp;
    + u64 size;
    + unsigned int flags;
    +
    + addrp = of_get_pci_address(dev, bar, &size, &flags);
    + if (addrp == NULL)
    + return -EINVAL;
    + return __of_address_to_resource(dev, addrp, size, flags, r);
    +}
    +EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
    +
    +static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
    +{
    + return (((pin - 1) + slot) % 4) + 1;
    +}
    +
    +int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
    +{
    + struct device_node *dn, *ppnode;
    + struct pci_dev *ppdev;
    + u32 lspec;
    + u32 laddr[3];
    + u8 pin;
    + int rc;
    +
    + /* Check if we have a device node, if yes, fallback to standard OF
    + * parsing
    + */
    + dn = pci_device_to_OF_node(pdev);
    + if (dn)
    + return of_irq_map_one(dn, 0, out_irq);
    +
    + /* Ok, we don't, time to have fun. Let's start by building up an
    + * interrupt spec. we assume #interrupt-cells is 1, which is standard
    + * for PCI. If you do different, then don't use that routine.
    + */
    + rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
    + if (rc != 0)
    + return rc;
    + /* No pin, exit */
    + if (pin == 0)
    + return -ENODEV;
    +
    + /* Now we walk up the PCI tree */
    + lspec = pin;
    + for (;;) {
    + /* Get the pci_dev of our parent */
    + ppdev = pdev->bus->self;
    +
    + /* Ouch, it's a host bridge... */
    + if (ppdev == NULL) {
    + struct pci_controller *host;
    + host = pci_bus_to_host(pdev->bus);
    + ppnode = host ? host->arch_data : NULL;
    + /* No node for host bridge ? give up */
    + if (ppnode == NULL)
    + return -EINVAL;
    + } else
    + /* We found a P2P bridge, check if it has a node */
    + ppnode = pci_device_to_OF_node(ppdev);
    +
    + /* Ok, we have found a parent with a device-node, hand over to
    + * the OF parsing code.
    + * We build a unit address from the linux device to be used for
    + * resolution. Note that we use the linux bus number which may
    + * not match your firmware bus numbering.
    + * Fortunately, in most cases, interrupt-map-mask doesn't
    + * include the bus number as part of the matching.
    + * You should still be careful about that though if you intend
    + * to rely on this function (you ship a firmware that doesn't
    + * create device nodes for all PCI devices).
    + */
    + if (ppnode)
    + break;
    +
    + /* We can only get here if we hit a P2P bridge with no node,
    + * let's do standard swizzling and try again
    + */
    + lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec);
    + pdev = ppdev;
    + }
    +
    + laddr[0] = (pdev->bus->number << 16)
    + | (pdev->devfn << 8);
    + laddr[1] = laddr[2] = 0;
    + return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
    +}
    +EXPORT_SYMBOL_GPL(of_irq_map_pci);
    +#endif /* CONFIG_PCI */
    +
    +/*
    + * ISA bus specific translator
    + */
    +
    +static int of_bus_isa_match(struct device_node *np)
    +{
    + return !strcmp(np->name, "isa");
    +}
    +
    +static void of_bus_isa_count_cells(struct device_node *child,
    + int *addrc, int *sizec)
    +{
    + if (addrc)
    + *addrc = 2;
    + if (sizec)
    + *sizec = 1;
    +}
    +
    +static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna)
    +{
    + u64 cp, s, da;
    +
    + /* Check address type match */
    + if ((addr[0] ^ range[0]) & 0x00000001)
    + return OF_BAD_ADDR;
    +
    + /* Read address values, skipping high cell */
    + cp = of_read_number(range + 1, na - 1);
    + s = of_read_number(range + na + pna, ns);
    + da = of_read_number(addr + 1, na - 1);
    +
    + pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
    +
    + if (da < cp || da >= (cp + s))
    + return OF_BAD_ADDR;
    + return da - cp;
    +}
    +
    +static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
    +{
    + return of_bus_default_translate(addr + 1, offset, na - 1);
    +}
    +
    +static unsigned int of_bus_isa_get_flags(const u32 *addr)
    +{
    + unsigned int flags = 0;
    + u32 w = addr[0];
    +
    + if (w & 1)
    + flags |= IORESOURCE_IO;
    + else
    + flags |= IORESOURCE_MEM;
    + return flags;
    +}
    +
    +/*
    + * Array of bus specific translators
    + */
    +
    +static struct of_bus of_busses[] = {
    +#ifdef CONFIG_PCI
    + /* PCI */
    + {
    + .name = "pci",
    + .addresses = "assigned-addresses",
    + .match = of_bus_pci_match,
    + .count_cells = of_bus_pci_count_cells,
    + .map = of_bus_pci_map,
    + .translate = of_bus_pci_translate,
    + .get_flags = of_bus_pci_get_flags,
    + },
    +#endif /* CONFIG_PCI */
    + /* ISA */
    + {
    + .name = "isa",
    + .addresses = "reg",
    + .match = of_bus_isa_match,
    + .count_cells = of_bus_isa_count_cells,
    + .map = of_bus_isa_map,
    + .translate = of_bus_isa_translate,
    + .get_flags = of_bus_isa_get_flags,
    + },
    + /* Default */
    + {
    + .name = "default",
    + .addresses = "reg",
    + .match = NULL,
    + .count_cells = of_bus_default_count_cells,
    + .map = of_bus_default_map,
    + .translate = of_bus_default_translate,
    + .get_flags = of_bus_default_get_flags,
    + },
    +};
    +
    +static struct of_bus *of_match_bus(struct device_node *np)
    +{
    + int i;
    +
    + for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
    + if (!of_busses[i].match || of_busses[i].match(np))
    + return &of_busses[i];
    + BUG();
    + return NULL;
    +}
    +
    +static int of_translate_one(struct device_node *parent, struct of_bus *bus,
    + struct of_bus *pbus, u32 *addr,
    + int na, int ns, int pna)
    +{
    + const u32 *ranges;
    + unsigned int rlen;
    + int rone;
    + u64 offset = OF_BAD_ADDR;
    +
    + /* Normally, an absence of a "ranges" property means we are
    + * crossing a non-translatable boundary, and thus the addresses
    + * below the current not cannot be converted to CPU physical ones.
    + * Unfortunately, while this is very clear in the spec, it's not
    + * what Apple understood, and they do have things like /uni-n or
    + * /ht nodes with no "ranges" property and a lot of perfectly
    + * useable mapped devices below them. Thus we treat the absence of
    + * "ranges" as equivalent to an empty "ranges" property which means
    + * a 1:1 translation at that level. It's up to the caller not to try
    + * to translate addresses that aren't supposed to be translated in
    + * the first place. --BenH.
    + */
    + ranges = of_get_property(parent, "ranges", (int *) &rlen);
    + if (ranges == NULL || rlen == 0) {
    + offset = of_read_number(addr, na);
    + memset(addr, 0, pna * 4);
    + pr_debug("OF: no ranges, 1:1 translation\n");
    + goto finish;
    + }
    +
    + pr_debug("OF: walking ranges...\n");
    +
    + /* Now walk through the ranges */
    + rlen /= 4;
    + rone = na + pna + ns;
    + for (; rlen >= rone; rlen -= rone, ranges += rone) {
    + offset = bus->map(addr, ranges, na, ns, pna);
    + if (offset != OF_BAD_ADDR)
    + break;
    + }
    + if (offset == OF_BAD_ADDR) {
    + pr_debug("OF: not found !\n");
    + return 1;
    + }
    + memcpy(addr, ranges + na, 4 * pna);
    +
    + finish:
    + of_dump_addr("OF: parent translation for:", addr, pna);
    + pr_debug("OF: with offset: "PRu64"\n", offset);
    +
    + /* Translate it into parent bus space */
    + return pbus->translate(addr, offset, pna);
    +}
    +
    +/*
    + * Translate an address from the device-tree into a CPU physical address,
    + * this walks up the tree and applies the various bus mappings on the
    + * way.
    + *
    + * Note: We consider that crossing any level with #size-cells == 0 to mean
    + * that translation is impossible (that is we are not dealing with a value
    + * that can be mapped to a cpu physical address). This is not really specified
    + * that way, but this is traditionally the way IBM at least do things
    + */
    +u64 of_translate_address(struct device_node *dev, const u32 *in_addr)
    +{
    + struct device_node *parent = NULL;
    + struct of_bus *bus, *pbus;
    + u32 addr[OF_MAX_ADDR_CELLS];
    + int na, ns, pna, pns;
    + u64 result = OF_BAD_ADDR;
    +
    + pr_debug("OF: ** translation for device %s **\n", dev->full_name);
    +
    + /* Increase refcount at current level */
    + of_node_get(dev);
    +
    + /* Get parent & match bus type */
    + parent = of_get_parent(dev);
    + if (parent == NULL)
    + goto bail;
    + bus = of_match_bus(parent);
    +
    + /* Cound address cells & copy address locally */
    + bus->count_cells(dev, &na, &ns);
    + if (!OF_CHECK_COUNTS(na, ns)) {
    + printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
    + dev->full_name);
    + goto bail;
    + }
    + memcpy(addr, in_addr, na * 4);
    +
    + pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
    + bus->name, na, ns, parent->full_name);
    + of_dump_addr("OF: translating address:", addr, na);
    +
    + /* Translate */
    + for (;;) {
    + /* Switch to parent bus */
    + of_node_put(dev);
    + dev = parent;
    + parent = of_get_parent(dev);
    +
    + /* If root, we have finished */
    + if (parent == NULL) {
    + pr_debug("OF: reached root node\n");
    + result = of_read_number(addr, na);
    + break;
    + }
    +
    + /* Get new parent bus and counts */
    + pbus = of_match_bus(parent);
    + pbus->count_cells(dev, &pna, &pns);
    + if (!OF_CHECK_COUNTS(pna, pns)) {
    + printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
    + dev->full_name);
    + break;
    + }
    +
    + pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
    + pbus->name, pna, pns, parent->full_name);
    +
    + /* Apply bus translation */
    + if (of_translate_one(dev, bus, pbus, addr, na, ns, pna))
    + break;
    +
    + /* Complete the move up one level */
    + na = pna;
    + ns = pns;
    + bus = pbus;
    +
    + of_dump_addr("OF: one level translation:", addr, na);
    + }
    + bail:
    + of_node_put(parent);
    + of_node_put(dev);
    +
    + return result;
    +}
    +EXPORT_SYMBOL(of_translate_address);
    +
    +const u32 *of_get_address(struct device_node *dev, int index, u64 *size,
    + unsigned int *flags)
    +{
    + const u32 *prop;
    + unsigned int psize;
    + struct device_node *parent;
    + struct of_bus *bus;
    + int onesize, i, na, ns;
    +
    + /* Get parent & match bus type */
    + parent = of_get_parent(dev);
    + if (parent == NULL)
    + return NULL;
    + bus = of_match_bus(parent);
    + bus->count_cells(dev, &na, &ns);
    + of_node_put(parent);
    + if (!OF_CHECK_COUNTS(na, ns))
    + return NULL;
    +
    + /* Get "reg" or "assigned-addresses" property */
    + prop = of_get_property(dev, bus->addresses, (int *) &psize);
    + if (prop == NULL)
    + return NULL;
    + psize /= 4;
    +
    + onesize = na + ns;
    + for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
    + if (i == index) {
    + if (size)
    + *size = of_read_number(prop + na, ns);
    + if (flags)
    + *flags = bus->get_flags(prop);
    + return prop;
    + }
    + return NULL;
    +}
    +EXPORT_SYMBOL(of_get_address);
    +
    +static int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
    + u64 size, unsigned int flags,
    + struct resource *r)
    +{
    + u64 taddr;
    +
    + if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
    + return -EINVAL;
    + taddr = of_translate_address(dev, addrp);
    + if (taddr == OF_BAD_ADDR)
    + return -EINVAL;
    + memset(r, 0, sizeof(struct resource));
    + if (flags & IORESOURCE_IO) {
    + unsigned long port;
    + port = -1; /* pci_address_to_pio(taddr); */
    + if (port == (unsigned long)-1)
    + return -EINVAL;
    + r->start = port;
    + r->end = port + size - 1;
    + } else {
    + r->start = taddr;
    + r->end = taddr + size - 1;
    + }
    + r->flags = flags;
    + r->name = dev->name;
    + return 0;
    +}
    +
    +int of_address_to_resource(struct device_node *dev, int index,
    + struct resource *r)
    +{
    + const u32 *addrp;
    + u64 size;
    + unsigned int flags;
    +
    + addrp = of_get_address(dev, index, &size, &flags);
    + if (addrp == NULL)
    + return -EINVAL;
    + return __of_address_to_resource(dev, addrp, size, flags, r);
    +}
    +EXPORT_SYMBOL_GPL(of_address_to_resource);
    +
    +void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
    + unsigned long *busno, unsigned long *phys, unsigned long *size)
    +{
    + const u32 *dma_window;
    + u32 cells;
    + const unsigned char *prop;
    +
    + dma_window = dma_window_prop;
    +
    + /* busno is always one cell */
    + *busno = *(dma_window++);
    +
    + prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
    + if (!prop)
    + prop = of_get_property(dn, "#address-cells", NULL);
    +
    + cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
    + *phys = of_read_number(dma_window, cells);
    +
    + dma_window += cells;
    +
    + prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
    + cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
    + *size = of_read_number(dma_window, cells);
    +}
    +
    +/*
    + * Interrupt remapper
    + */
    +
    +static unsigned int of_irq_workarounds;
    +static struct device_node *of_irq_dflt_pic;
    +
    +static struct device_node *of_irq_find_parent(struct device_node *child)
    +{
    + struct device_node *p;
    + const phandle *parp;
    +
    + if (!of_node_get(child))
    + return NULL;
    +
    + do {
    + parp = of_get_property(child, "interrupt-parent", NULL);
    + if (parp == NULL)
    + p = of_get_parent(child);
    + else {
    + if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
    + p = of_node_get(of_irq_dflt_pic);
    + else
    + p = of_find_node_by_phandle(*parp);
    + }
    + of_node_put(child);
    + child = p;
    + } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
    +
    + return p;
    +}
    +
    +/* This doesn't need to be called if you don't have any special workaround
    + * flags to pass
    + */
    +void of_irq_map_init(unsigned int flags)
    +{
    + of_irq_workarounds = flags;
    +
    + /* OldWorld, don't bother looking at other things */
    + if (flags & OF_IMAP_OLDWORLD_MAC)
    + return;
    +
    + /* If we don't have phandles, let's try to locate a default interrupt
    + * controller (happens when booting with BootX). We do a first match
    + * here, hopefully, that only ever happens on machines with one
    + * controller.
    + */
    + if (flags & OF_IMAP_NO_PHANDLE) {
    + struct device_node *np;
    +
    + for (np = NULL; (np = of_find_all_nodes(np)) != NULL;) {
    + if (of_get_property(np, "interrupt-controller", NULL)
    + == NULL)
    + continue;
    + /* Skip /chosen/interrupt-controller */
    + if (strcmp(np->name, "chosen") == 0)
    + continue;
    + /* It seems like at least one person on this planet
    + * wants to use BootX on a machine with an AppleKiwi
    + * controller which happens to pretend to be an
    + * interrupt controller too.
    + */
    + if (strcmp(np->name, "AppleKiwi") == 0)
    + continue;
    + /* I think we found one ! */
    + of_irq_dflt_pic = np;
    + break;
    + }
    + }
    +
    +}
    +
    +int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
    + const u32 *addr, struct of_irq *out_irq)
    +{
    + struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
    + const u32 *tmp, *imap, *imask;
    + u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
    + int imaplen, match, i;
    +
    + pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],"
    + "ointsize=%d\n",
    + parent->full_name, intspec[0], intspec[1], ointsize);
    +
    + ipar = of_node_get(parent);
    +
    + /* First get the #interrupt-cells property of the current cursor
    + * that tells us how to interpret the passed-in intspec. If there
    + * is none, we are nice and just walk up the tree
    + */
    + do {
    + tmp = of_get_property(ipar, "#interrupt-cells", NULL);
    + if (tmp != NULL) {
    + intsize = *tmp;
    + break;
    + }
    + tnode = ipar;
    + ipar = of_irq_find_parent(ipar);
    + of_node_put(tnode);
    + } while (ipar);
    + if (ipar == NULL) {
    + pr_debug(" -> no parent found !\n");
    + goto fail;
    + }
    +
    + pr_debug("of_irq_map_raw: ipar=%s, size=%d\n",
    + ipar->full_name, intsize);
    +
    + if (ointsize != intsize)
    + return -EINVAL;
    +
    + /* Look for this #address-cells. We have to implement the old linux
    + * trick of looking for the parent here as some device-trees rely on it
    + */
    + old = of_node_get(ipar);
    + do {
    + tmp = of_get_property(old, "#address-cells", NULL);
    + tnode = of_get_parent(old);
    + of_node_put(old);
    + old = tnode;
    + } while (old && tmp == NULL);
    + of_node_put(old);
    + old = NULL;
    + addrsize = (tmp == NULL) ? 2 : *tmp;
    +
    + pr_debug(" -> addrsize=%d\n", addrsize);
    +
    + /* Now start the actual "proper" walk of the interrupt tree */
    + while (ipar != NULL) {
    + /* Now check if cursor is an interrupt-controller and if it is
    + * then we are done
    + */
    + if (of_get_property(ipar, "interrupt-controller", NULL) !=
    + NULL) {
    + pr_debug(" -> got it !\n");
    + memcpy(out_irq->specifier, intspec,
    + intsize * sizeof(u32));
    + out_irq->size = intsize;
    + out_irq->controller = ipar;
    + of_node_put(old);
    + return 0;
    + }
    +
    + /* Now look for an interrupt-map */
    + imap = of_get_property(ipar, "interrupt-map", &imaplen);
    + /* No interrupt map, check for an interrupt parent */
    + if (imap == NULL) {
    + pr_debug(" -> no map, getting parent\n");
    + newpar = of_irq_find_parent(ipar);
    + goto skiplevel;
    + }
    + imaplen /= sizeof(u32);
    +
    + /* Look for a mask */
    + imask = of_get_property(ipar, "interrupt-map-mask", NULL);
    +
    + /* If we were passed no "reg" property and we attempt to parse
    + * an interrupt-map, then #address-cells must be 0.
    + * Fail if it's not.
    + */
    + if (addr == NULL && addrsize != 0) {
    + pr_debug(" -> no reg passed in when needed !\n");
    + goto fail;
    + }
    +
    + /* Parse interrupt-map */
    + match = 0;
    + while (imaplen > (addrsize + intsize + 1) && !match) {
    + /* Compare specifiers */
    + match = 1;
    + for (i = 0; i < addrsize && match; ++i) {
    + u32 mask = imask ? imask[i] : 0xffffffffu;
    + match = ((addr[i] ^ imap[i]) & mask) == 0;
    + }
    + for (; i < (addrsize + intsize) && match; ++i) {
    + u32 mask = imask ? imask[i] : 0xffffffffu;
    + match =
    + ((intspec[i-addrsize] ^ imap[i])
    + & mask) == 0;
    + }
    + imap += addrsize + intsize;
    + imaplen -= addrsize + intsize;
    +
    + pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen);
    +
    + /* Get the interrupt parent */
    + if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
    + newpar = of_node_get(of_irq_dflt_pic);
    + else
    + newpar =
    + of_find_node_by_phandle((phandle)*imap);
    + imap++;
    + --imaplen;
    +
    + /* Check if not found */
    + if (newpar == NULL) {
    + pr_debug(" -> imap parent not found !\n");
    + goto fail;
    + }
    +
    + /* Get #interrupt-cells and #address-cells of new
    + * parent
    + */
    + tmp = of_get_property(newpar, "#interrupt-cells", NULL);
    + if (tmp == NULL) {
    + pr_debug(" -> parent lacks "
    + "#interrupt-cells!\n");
    + goto fail;
    + }
    + newintsize = *tmp;
    + tmp = of_get_property(newpar, "#address-cells", NULL);
    + newaddrsize = (tmp == NULL) ? 0 : *tmp;
    +
    + pr_debug(" -> newintsize=%d, newaddrsize=%d\n",
    + newintsize, newaddrsize);
    +
    + /* Check for malformed properties */
    + if (imaplen < (newaddrsize + newintsize))
    + goto fail;
    +
    + imap += newaddrsize + newintsize;
    + imaplen -= newaddrsize + newintsize;
    +
    + pr_debug(" -> imaplen=%d\n", imaplen);
    + }
    + if (!match)
    + goto fail;
    +
    + of_node_put(old);
    + old = of_node_get(newpar);
    + addrsize = newaddrsize;
    + intsize = newintsize;
    + intspec = imap - intsize;
    + addr = intspec - addrsize;
    +
    +skiplevel:
    + /* Iterate again with new parent */
    + pr_debug(" -> new parent: %s\n",
    + newpar ? newpar->full_name : "<>");
    + of_node_put(ipar);
    + ipar = newpar;
    + newpar = NULL;
    + }
    +fail:
    + of_node_put(ipar);
    + of_node_put(old);
    + of_node_put(newpar);
    +
    + return -EINVAL;
    +}
    +EXPORT_SYMBOL_GPL(of_irq_map_raw);
    +
    +int of_irq_map_one(struct device_node *device,
    + int index, struct of_irq *out_irq)
    +{
    + struct device_node *p;
    + const u32 *intspec, *tmp, *addr;
    + u32 intsize, intlen;
    + int res;
    +
    + pr_debug("of_irq_map_one: dev=%s, index=%d\n",
    + device->full_name, index);
    +
    + /* Get the interrupts property */
    + intspec = of_get_property(device, "interrupts", (int *) &intlen);
    + if (intspec == NULL)
    + return -EINVAL;
    + intlen /= sizeof(u32);
    +
    + pr_debug(" intspec=%d intlen=%d\n", *intspec, intlen);
    +
    + /* Get the reg property (if any) */
    + addr = of_get_property(device, "reg", NULL);
    +
    + /* Look for the interrupt parent. */
    + p = of_irq_find_parent(device);
    + if (p == NULL)
    + return -EINVAL;
    +
    + /* Get size of interrupt specifier */
    + tmp = of_get_property(p, "#interrupt-cells", NULL);
    + if (tmp == NULL) {
    + of_node_put(p);
    + return -EINVAL;
    + }
    + intsize = *tmp;
    +
    + pr_debug(" intsize=%d intlen=%d\n", intsize, intlen);
    +
    + /* Check index */
    + if ((index + 1) * intsize > intlen)
    + return -EINVAL;
    +
    + /* Get new specifier and map it */
    + res = of_irq_map_raw(p, intspec + index * intsize, intsize,
    + addr, out_irq);
    + of_node_put(p);
    + return res;
    +}
    +EXPORT_SYMBOL_GPL(of_irq_map_one);
    +
    +/**
    + * Search the device tree for the best MAC address to use. 'mac-address' is
    + * checked first, because that is supposed to contain to "most recent" MAC
    + * address. If that isn't set, then 'local-mac-address' is checked next,
    + * because that is the default address. If that isn't set, then the obsolete
    + * 'address' is checked, just in case we're using an old device tree.
    + *
    + * Note that the 'address' property is supposed to contain a virtual address of
    + * the register set, but some DTS files have redefined that property to be the
    + * MAC address.
    + *
    + * All-zero MAC addresses are rejected, because those could be properties that
    + * exist in the device tree, but were not set by U-Boot. For example, the
    + * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
    + * addresses. Some older U-Boots only initialized 'local-mac-address'. In
    + * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
    + * but is all zeros.
    +*/
    +const void *of_get_mac_address(struct device_node *np)
    +{
    + struct property *pp;
    +
    + pp = of_find_property(np, "mac-address", NULL);
    + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
    + return pp->value;
    +
    + pp = of_find_property(np, "local-mac-address", NULL);
    + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
    + return pp->value;
    +
    + pp = of_find_property(np, "address", NULL);
    + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
    + return pp->value;
    +
    + return NULL;
    +}
    +EXPORT_SYMBOL(of_get_mac_address);
    +
    +int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
    +{
    + struct of_irq out_irq;
    + int irq;
    + int res;
    +
    + res = of_irq_map_one(dev, index, &out_irq);
    +
    + /* Get irq for the device */
    + if (res) {
    + pr_debug("IRQ not found... code = %d", res);
    + return NO_IRQ;
    + }
    + /* Assuming single interrupt controller... */
    + irq = out_irq.specifier[0];
    +
    + pr_debug("IRQ found = %d", irq);
    +
    + /* Only dereference the resource if both the
    + * resource and the irq are valid. */
    + if (r && irq != NO_IRQ) {
    + r->start = r->end = irq;
    + r->flags = IORESOURCE_IRQ;
    + }
    +
    + return irq;
    +}
    +EXPORT_SYMBOL_GPL(of_irq_to_resource);
    +
    +void __iomem *of_iomap(struct device_node *np, int index)
    +{
    + struct resource res;
    +
    + if (of_address_to_resource(np, index, &res))
    + return NULL;
    +
    + return ioremap(res.start, 1 + res.end - res.start);
    +}
    +EXPORT_SYMBOL(of_iomap);
    diff --git a/include/linux/of_device.h b/include/linux/of_device.h
    index afe3382..060612e 100644
    --- a/include/linux/of_device.h
    +++ b/include/linux/of_device.h
    @@ -24,4 +24,13 @@ static inline void of_device_free(struct of_device *dev)
    of_release_dev(&dev->dev);
    }

    +extern struct of_device *of_device_alloc(struct device_node *np,
    + const char *bus_id,
    + struct device *parent);
    +
    +extern ssize_t of_device_get_modalias(struct of_device *ofdev,
    + char *str, ssize_t len);
    +extern int of_device_uevent(struct device *dev,
    + struct kobj_uevent_env *env);
    +
    #endif /* _LINUX_OF_DEVICE_H */
    diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h
    index a8efcfe..cbcc569 100644
    --- a/include/linux/of_platform.h
    +++ b/include/linux/of_platform.h
    @@ -58,4 +58,29 @@ extern struct of_device *of_find_device_by_node(struct device_node *np);

    extern int of_bus_type_init(struct bus_type *bus, const char *name);

    +/* 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 /* _LINUX_OF_PLATFORM_H */
    --
    1.5.4.GIT


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