* Copyright (c) 2001 Matthew Wilcox for Hewlett Packard
* Copyright (c) 2001 Helge Deller <deller@gmx.de>
* Copyright (c) 2001,2002 Ryan Bradetich
+ * Copyright (c) 2004 Thibaut VARENE <varenet@parisc-linux.org>
*
* The file handles registering devices and drivers, then matching them.
* It's the closest we get to a dating agency.
+ *
+ * If you're thinking about modifying this file, here are some gotchas to
+ * bear in mind:
+ * - 715/Mirage device paths have a dummy device between Lasi and its children
+ * - The EISA adapter may show up as a sibling or child of Wax
+ * - Dino has an optionally functional serial port. If firmware enables it,
+ * it shows up as a child of Dino. If firmware disables it, the buswalk
+ * finds it and it shows up as a child of Cujo
+ * - Dino has both parisc and pci devices as children
+ * - parisc devices are discovered in a random order, including children
+ * before parents in some cases.
*/
#include <linux/slab.h>
struct hppa_dma_ops *hppa_dma_ops;
EXPORT_SYMBOL(hppa_dma_ops);
-static struct parisc_device root;
+static struct device root = {
+ .bus_id = "parisc",
+};
-#define for_each_padev(dev) \
- for (dev = root.child; dev != NULL; dev = next_dev(dev))
+#define for_each_padev(padev) \
+ for (padev = next_dev(&root); padev != NULL; \
+ padev = next_dev(&padev->dev))
-#define check_dev(dev) \
- (dev->id.hw_type != HPHW_FAULTY) ? dev : next_dev(dev)
+#define check_dev(padev) \
+ (padev->id.hw_type != HPHW_FAULTY) ? padev : next_dev(&padev->dev)
/**
* next_dev - enumerates registered devices
* next_dev does a depth-first search of the tree, returning parents
* before children. Returns NULL when there are no more devices.
*/
-struct parisc_device *next_dev(struct parisc_device *dev)
+static struct parisc_device *next_dev(struct device *dev)
{
- if (dev->child) {
- return check_dev(dev->child);
- } else if (dev->sibling) {
- return dev->sibling;
+ if (!list_empty(&dev->children)) {
+ dev = list_to_dev(dev->children.next);
+ return check_dev(to_parisc_device(dev));
}
- /* Exhausted tree at this level, time to go up. */
- do {
+ while (dev != &root) {
+ if (dev->node.next != &dev->parent->children) {
+ dev = list_to_dev(dev->node.next);
+ return to_parisc_device(dev);
+ }
dev = dev->parent;
- if (dev && dev->sibling)
- return dev->sibling;
- } while (dev != &root);
+ }
return NULL;
}
* Walks up the device tree looking for a device of the specified type.
* If it finds it, it returns it. If not, it returns NULL.
*/
-const struct parisc_device *find_pa_parent_type(const struct parisc_device *dev, int type)
+const struct parisc_device *
+find_pa_parent_type(const struct parisc_device *padev, int type)
{
+ const struct device *dev = &padev->dev;
while (dev != &root) {
- if (dev->id.hw_type == type)
- return dev;
+ struct parisc_device *candidate = to_parisc_device(dev);
+ if (candidate->id.hw_type == type)
+ return candidate;
dev = dev->parent;
}
return NULL;
}
-static void
-get_node_path(struct parisc_device *dev, struct hardware_path *path)
+#ifdef CONFIG_PCI
+static inline int is_pci_dev(struct device *dev)
+{
+ return dev->bus == &pci_bus_type;
+}
+#else
+static inline int is_pci_dev(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+/*
+ * get_node_path fills in @path with the firmware path to the device.
+ * Note that if @node is a parisc device, we don't fill in the 'mod' field.
+ * This is because both callers pass the parent and fill in the mod
+ * themselves. If @node is a PCI device, we do fill it in, even though this
+ * is inconsistent.
+ */
+static void get_node_path(struct device *dev, struct hardware_path *path)
{
int i = 5;
memset(&path->bc, -1, 6);
+
+ if (is_pci_dev(dev)) {
+ unsigned int devfn = to_pci_dev(dev)->devfn;
+ path->mod = PCI_FUNC(devfn);
+ path->bc[i--] = PCI_SLOT(devfn);
+ dev = dev->parent;
+ }
+
while (dev != &root) {
- path->bc[i--] = dev->hw_path;
+ if (is_pci_dev(dev)) {
+ unsigned int devfn = to_pci_dev(dev)->devfn;
+ path->bc[i--] = PCI_SLOT(devfn) | (PCI_FUNC(devfn)<< 5);
+ } else if (dev->bus == &parisc_bus_type) {
+ path->bc[i--] = to_parisc_device(dev)->hw_path;
+ }
dev = dev->parent;
}
}
{
struct hardware_path path;
- get_node_path(dev->parent, &path);
+ get_node_path(dev->dev.parent, &path);
path.mod = dev->hw_path;
return print_hwpath(&path, output);
}
#if defined(CONFIG_PCI) || defined(CONFIG_ISA)
/**
- * get_pci_node_path - Returns hardware path for PCI devices
- * dev: The device to return the path for
- * output: Pointer to a previously-allocated array to place the path in.
+ * get_pci_node_path - Determines the hardware path for a PCI device
+ * @pdev: The device to return the path for
+ * @path: Pointer to a previously-allocated array to place the path in.
*
* This function fills in the hardware_path structure with the route to
* the specified PCI device. This structure is suitable for passing to
* PDC calls.
*/
-void get_pci_node_path(struct pci_dev *dev, struct hardware_path *path)
+void get_pci_node_path(struct pci_dev *pdev, struct hardware_path *path)
{
- struct pci_bus *bus;
- const struct parisc_device *padev;
- int i = 5;
-
- memset(&path->bc, -1, 6);
- path->mod = PCI_FUNC(dev->devfn);
- path->bc[i--] = PCI_SLOT(dev->devfn);
- for (bus = dev->bus; bus->parent; bus = bus->parent) {
- unsigned int devfn = bus->self->devfn;
- path->bc[i--] = PCI_SLOT(devfn) | (PCI_FUNC(devfn) << 5);
- }
-
- padev = HBA_DATA(bus->bridge->platform_data)->dev;
- while (padev != &root) {
- path->bc[i--] = padev->hw_path;
- padev = padev->parent;
- }
+ get_node_path(&pdev->dev, path);
}
EXPORT_SYMBOL(get_pci_node_path);
#endif /* defined(CONFIG_PCI) || defined(CONFIG_ISA) */
+static void setup_bus_id(struct parisc_device *padev)
+{
+ struct hardware_path path;
+ char *output = padev->dev.bus_id;
+ int i;
+
+ get_node_path(padev->dev.parent, &path);
-struct parisc_device * create_tree_node(char id, struct parisc_device *parent,
- struct parisc_device **insert)
+ for (i = 0; i < 6; i++) {
+ if (path.bc[i] == -1)
+ continue;
+ output += sprintf(output, "%u:", (unsigned char) path.bc[i]);
+ }
+ sprintf(output, "%u", (unsigned char) padev->hw_path);
+}
+
+struct parisc_device * create_tree_node(char id, struct device *parent)
{
struct parisc_device *dev = kmalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
+
memset(dev, 0, sizeof(*dev));
dev->hw_path = id;
dev->id.hw_type = HPHW_FAULTY;
- dev->parent = parent;
- dev->sibling = *insert;
- *insert = dev;
+
+ dev->dev.parent = parent;
+ setup_bus_id(dev);
+
+ dev->dev.bus = &parisc_bus_type;
+ dev->dma_mask = 0xffffffffUL; /* PARISC devices are 32-bit */
+
+ /* make the generic dma mask a pointer to the parisc one */
+ dev->dev.dma_mask = &dev->dma_mask;
+ dev->dev.coherent_dma_mask = dev->dma_mask;
+ device_register(&dev->dev);
+
return dev;
}
* Checks all the children of @parent for a matching @id. If none
* found, it allocates a new device and returns it.
*/
-struct parisc_device *
-alloc_tree_node(struct parisc_device *parent, char id)
+static struct parisc_device * alloc_tree_node(struct device *parent, char id)
{
- struct parisc_device *prev;
- if ((!parent->child) || (parent->child->hw_path > id)) {
- return create_tree_node(id, parent, &parent->child);
- }
+ struct device *dev;
- prev = parent->child;
- if (prev->hw_path == id)
- return prev;
-
- while (prev->sibling && prev->sibling->hw_path < id) {
- prev = prev->sibling;
+ list_for_each_entry(dev, &parent->children, node) {
+ struct parisc_device *padev = to_parisc_device(dev);
+ if (padev->hw_path == id)
+ return padev;
}
- if ((prev->sibling) && (prev->sibling->hw_path == id))
- return prev->sibling;
-
- return create_tree_node(id, parent, &prev->sibling);
+ return create_tree_node(id, parent);
}
-static struct parisc_device *find_parisc_device(struct hardware_path *modpath)
+static struct parisc_device *create_parisc_device(struct hardware_path *modpath)
{
int i;
- struct parisc_device *parent = &root;
+ struct device *parent = &root;
for (i = 0; i < 6; i++) {
if (modpath->bc[i] == -1)
continue;
- parent = alloc_tree_node(parent, modpath->bc[i]);
+ parent = &alloc_tree_node(parent, modpath->bc[i])->dev;
}
return alloc_tree_node(parent, modpath->mod);
}
if (status != PDC_OK)
return NULL;
- dev = find_parisc_device(mod_path);
+ dev = create_parisc_device(mod_path);
if (dev->id.hw_type != HPHW_FAULTY) {
char p[64];
print_pa_hwpath(dev, p);
static int parisc_generic_match(struct device *dev, struct device_driver *drv)
{
- return match_device(to_parisc_driver(drv), to_parisc_device(dev));
+ return match_device(to_parisc_driver(drv), to_parisc_device(dev));
+}
+
+#define pa_dev_attr(name, field, format_string) \
+static ssize_t name##_show(struct device *dev, char *buf) \
+{ \
+ struct parisc_device *padev = to_parisc_device(dev); \
+ return sprintf(buf, format_string, padev->field); \
}
+#define pa_dev_attr_id(field, format) pa_dev_attr(field, id.field, format)
+
+pa_dev_attr(irq, irq, "%u\n");
+pa_dev_attr_id(hw_type, "0x%02x\n");
+pa_dev_attr(rev, id.hversion_rev, "0x%x\n");
+pa_dev_attr_id(hversion, "0x%03x\n");
+pa_dev_attr_id(sversion, "0x%05x\n");
+
+static struct device_attribute parisc_device_attrs[] = {
+ __ATTR_RO(irq),
+ __ATTR_RO(hw_type),
+ __ATTR_RO(rev),
+ __ATTR_RO(hversion),
+ __ATTR_RO(sversion),
+ __ATTR_NULL,
+};
+
struct bus_type parisc_bus_type = {
.name = "parisc",
.match = parisc_generic_match,
+ .dev_attrs = parisc_device_attrs,
};
/**
return 0;
}
+/**
+ * match_pci_device - Matches a pci device against a given hardware path
+ * entry.
+ * @dev: the generic device (known to be contained by a pci_dev).
+ * @index: the current BC index
+ * @modpath: the hardware path.
+ * @return: true if the device matches the hardware path.
+ */
+static int match_pci_device(struct device *dev, int index,
+ struct hardware_path *modpath)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ int id;
+
+ if (index == 5) {
+ /* we are at the end of the path, and on the actual device */
+ unsigned int devfn = pdev->devfn;
+ return ((modpath->bc[5] == PCI_SLOT(devfn)) &&
+ (modpath->mod == PCI_FUNC(devfn)));
+ }
+
+ id = PCI_SLOT(pdev->devfn) | (PCI_FUNC(pdev->devfn) << 5);
+ return (modpath->bc[index] == id);
+}
+
+/**
+ * match_parisc_device - Matches a parisc device against a given hardware
+ * path entry.
+ * @dev: the generic device (known to be contained by a parisc_device).
+ * @index: the current BC index
+ * @modpath: the hardware path.
+ * @return: true if the device matches the hardware path.
+ */
+static int match_parisc_device(struct device *dev, int index,
+ struct hardware_path *modpath)
+{
+ struct parisc_device *curr = to_parisc_device(dev);
+ char id = (index == 6) ? modpath->mod : modpath->bc[index];
+
+ return (curr->hw_path == id);
+}
+
+/**
+ * parse_tree_node - returns a device entry in the iotree
+ * @parent: the parent node in the tree
+ * @index: the current BC index
+ * @modpath: the hardware_path struct to match a device against
+ * @return: The corresponding device if found, NULL otherwise.
+ *
+ * Checks all the children of @parent for a matching @id. If none
+ * found, it returns NULL.
+ */
+static struct device *
+parse_tree_node(struct device *parent, int index, struct hardware_path *modpath)
+{
+ struct device *device;
+
+ list_for_each_entry(device, &parent->children, node) {
+ if (device->bus == &parisc_bus_type) {
+ if (match_parisc_device(device, index, modpath))
+ return device;
+ } else if (is_pci_dev(device)) {
+ if (match_pci_device(device, index, modpath))
+ return device;
+ } else if (device->bus == NULL) {
+ /* we are on a bus bridge */
+ struct device *new = parse_tree_node(device, index, modpath);
+ if (new)
+ return new;
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * hwpath_to_device - Finds the generic device corresponding to a given hardware path.
+ * @modpath: the hardware path.
+ * @return: The target device, NULL if not found.
+ */
+struct device *hwpath_to_device(struct hardware_path *modpath)
+{
+ int i;
+ struct device *parent = &root;
+ for (i = 0; i < 6; i++) {
+ if (modpath->bc[i] == -1)
+ continue;
+ parent = parse_tree_node(parent, i, modpath);
+ if (!parent)
+ return NULL;
+ }
+ if (is_pci_dev(parent)) /* pci devices already parse MOD */
+ return parent;
+ else
+ return parse_tree_node(parent, 6, modpath);
+}
+EXPORT_SYMBOL(hwpath_to_device);
+
#define BC_PORT_MASK 0x8
#define BC_LOWER_PORT 0x8
((dev->id.hw_type == HPHW_IOA) || (dev->id.hw_type == HPHW_BCPORT))
#define IS_LOWER_PORT(dev) \
- ((gsc_readl(&((struct bc_module *)dev->hpa)->io_status) \
+ ((gsc_readl(dev->hpa + offsetof(struct bc_module, io_status)) \
& BC_PORT_MASK) == BC_LOWER_PORT)
#define MAX_NATIVE_DEVICES 64
#define FLEX_MASK F_EXTEND(0xfffc0000)
#define IO_IO_LOW offsetof(struct bc_module, io_io_low)
#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)
-#define READ_IO_IO_LOW(dev) (unsigned long)(signed int)__raw_readl(dev->hpa + IO_IO_LOW)
-#define READ_IO_IO_HIGH(dev) (unsigned long)(signed int)__raw_readl(dev->hpa + IO_IO_HIGH)
+#define READ_IO_IO_LOW(dev) (unsigned long)(signed int)gsc_readl(dev->hpa + IO_IO_LOW)
+#define READ_IO_IO_HIGH(dev) (unsigned long)(signed int)gsc_readl(dev->hpa + IO_IO_HIGH)
static void walk_native_bus(unsigned long io_io_low, unsigned long io_io_high,
- struct parisc_device *parent);
+ struct device *parent);
void walk_lower_bus(struct parisc_device *dev)
{
io_io_high = (READ_IO_IO_HIGH(dev)+ ~FLEX_MASK) & FLEX_MASK;
}
- walk_native_bus(io_io_low, io_io_high, dev);
+ walk_native_bus(io_io_low, io_io_high, &dev->dev);
}
/**
* keyboard ports). This problem is not yet solved.
*/
static void walk_native_bus(unsigned long io_io_low, unsigned long io_io_high,
- struct parisc_device *parent)
+ struct device *parent)
{
int i, devices_found = 0;
unsigned long hpa = io_io_low;
&root);
}
-void fixup_child_irqs(struct parisc_device *parent, int base,
- int (*choose_irq)(struct parisc_device *))
-{
- struct parisc_device *dev;
-
- if (!parent->child)
- return;
-
- for (dev = check_dev(parent->child); dev; dev = dev->sibling) {
- int irq = choose_irq(dev);
- if (irq > 0) {
-#ifdef __LP64__
- irq += 32;
-#endif
- dev->irq = base + irq;
- }
- }
-}
-
static void print_parisc_device(struct parisc_device *dev)
{
char hw_path[64];
printk("\n");
}
-void print_subdevices(struct parisc_device *parent)
-{
- struct parisc_device *dev;
- for (dev = parent->child; dev != parent->sibling; dev = next_dev(dev)) {
- print_parisc_device(dev);
- }
-}
-
-
-/*
- * parisc_generic_device_register_recursive() - internal function to recursively
- * register all parisc devices
- */
-static void parisc_generic_device_register_recursive( struct parisc_device *dev )
-{
- char tmp1[32];
-
- /* has this device been registered already ? */
- if (dev->dev.dma_mask != NULL)
- return;
-
- /* register all parents recursively */
- if (dev->parent && dev->parent!=&root)
- parisc_generic_device_register_recursive(dev->parent);
-
- /* set up the generic device tree for this */
- snprintf(tmp1, sizeof(tmp1), "%d", dev->hw_path);
- if (dev->parent && dev->parent != &root) {
- struct parisc_device *ndev;
- char tmp2[32];
-
- dev->dev.parent = &dev->parent->dev;
- for(ndev = dev->parent; ndev != &root;
- ndev = ndev->parent) {
- snprintf(tmp2, sizeof(tmp2), "%d:%s",
- ndev->hw_path, tmp1);
- strlcpy(tmp1, tmp2, sizeof(tmp1));
- }
- }
-
- dev->dev.bus = &parisc_bus_type;
- snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id), "parisc%s",
- tmp1);
- /* make the generic dma mask a pointer to the parisc one */
- dev->dev.dma_mask = &dev->dma_mask;
- dev->dev.coherent_dma_mask = dev->dma_mask;
- pr_debug("device_register(%s)\n", dev->dev.bus_id);
- device_register(&dev->dev);
-}
-
-/*
- * parisc_generic_device_register() - register all parisc devices
+/**
+ * init_parisc_bus - Some preparation to be done before inventory
*/
-void parisc_generic_device_register(void)
+void init_parisc_bus(void)
{
- struct parisc_device *dev;
-
bus_register(&parisc_bus_type);
-
- for_each_padev(dev) {
- parisc_generic_device_register_recursive( dev );
- }
+ device_register(&root);
+ get_device(&root);
}
/**
git://git.onelab.eu / linux-2.6.git / blobdiff