diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/parisc/kernel/drivers.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/parisc/kernel/drivers.c | 923 |
1 files changed, 0 insertions, 923 deletions
diff --git a/ANDROID_3.4.5/arch/parisc/kernel/drivers.c b/ANDROID_3.4.5/arch/parisc/kernel/drivers.c deleted file mode 100644 index 5709c5e5..00000000 --- a/ANDROID_3.4.5/arch/parisc/kernel/drivers.c +++ /dev/null @@ -1,923 +0,0 @@ -/* - * drivers.c - * - * 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. - * - * Copyright (c) 1999 The Puffin Group - * Copyright (c) 2001 Matthew Wilcox for Hewlett Packard - * Copyright (c) 2001 Helge Deller <deller@gmx.de> - * Copyright (c) 2001,2002 Ryan Bradetich - * Copyright (c) 2004-2005 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> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/spinlock.h> -#include <linux/string.h> -#include <linux/export.h> -#include <asm/hardware.h> -#include <asm/io.h> -#include <asm/pdc.h> -#include <asm/parisc-device.h> - -/* See comments in include/asm-parisc/pci.h */ -struct hppa_dma_ops *hppa_dma_ops __read_mostly; -EXPORT_SYMBOL(hppa_dma_ops); - -static struct device root = { - .init_name = "parisc", -}; - -static inline int check_dev(struct device *dev) -{ - if (dev->bus == &parisc_bus_type) { - struct parisc_device *pdev; - pdev = to_parisc_device(dev); - return pdev->id.hw_type != HPHW_FAULTY; - } - return 1; -} - -static struct device * -parse_tree_node(struct device *parent, int index, struct hardware_path *modpath); - -struct recurse_struct { - void * obj; - int (*fn)(struct device *, void *); -}; - -static int descend_children(struct device * dev, void * data) -{ - struct recurse_struct * recurse_data = (struct recurse_struct *)data; - - if (recurse_data->fn(dev, recurse_data->obj)) - return 1; - else - return device_for_each_child(dev, recurse_data, descend_children); -} - -/** - * for_each_padev - Iterate over all devices in the tree - * @fn: Function to call for each device. - * @data: Data to pass to the called function. - * - * This performs a depth-first traversal of the tree, calling the - * function passed for each node. It calls the function for parents - * before children. - */ - -static int for_each_padev(int (*fn)(struct device *, void *), void * data) -{ - struct recurse_struct recurse_data = { - .obj = data, - .fn = fn, - }; - return device_for_each_child(&root, &recurse_data, descend_children); -} - -/** - * match_device - Report whether this driver can handle this device - * @driver: the PA-RISC driver to try - * @dev: the PA-RISC device to try - */ -static int match_device(struct parisc_driver *driver, struct parisc_device *dev) -{ - const struct parisc_device_id *ids; - - for (ids = driver->id_table; ids->sversion; ids++) { - if ((ids->sversion != SVERSION_ANY_ID) && - (ids->sversion != dev->id.sversion)) - continue; - - if ((ids->hw_type != HWTYPE_ANY_ID) && - (ids->hw_type != dev->id.hw_type)) - continue; - - if ((ids->hversion != HVERSION_ANY_ID) && - (ids->hversion != dev->id.hversion)) - continue; - - return 1; - } - return 0; -} - -static int parisc_driver_probe(struct device *dev) -{ - int rc; - struct parisc_device *pa_dev = to_parisc_device(dev); - struct parisc_driver *pa_drv = to_parisc_driver(dev->driver); - - rc = pa_drv->probe(pa_dev); - - if (!rc) - pa_dev->driver = pa_drv; - - return rc; -} - -static int parisc_driver_remove(struct device *dev) -{ - struct parisc_device *pa_dev = to_parisc_device(dev); - struct parisc_driver *pa_drv = to_parisc_driver(dev->driver); - if (pa_drv->remove) - pa_drv->remove(pa_dev); - - return 0; -} - - -/** - * register_parisc_driver - Register this driver if it can handle a device - * @driver: the PA-RISC driver to try - */ -int register_parisc_driver(struct parisc_driver *driver) -{ - /* FIXME: we need this because apparently the sti - * driver can be registered twice */ - if(driver->drv.name) { - printk(KERN_WARNING - "BUG: skipping previously registered driver %s\n", - driver->name); - return 1; - } - - if (!driver->probe) { - printk(KERN_WARNING - "BUG: driver %s has no probe routine\n", - driver->name); - return 1; - } - - driver->drv.bus = &parisc_bus_type; - - /* We install our own probe and remove routines */ - WARN_ON(driver->drv.probe != NULL); - WARN_ON(driver->drv.remove != NULL); - - driver->drv.name = driver->name; - - return driver_register(&driver->drv); -} -EXPORT_SYMBOL(register_parisc_driver); - - -struct match_count { - struct parisc_driver * driver; - int count; -}; - -static int match_and_count(struct device * dev, void * data) -{ - struct match_count * m = data; - struct parisc_device * pdev = to_parisc_device(dev); - - if (check_dev(dev)) { - if (match_device(m->driver, pdev)) - m->count++; - } - return 0; -} - -/** - * count_parisc_driver - count # of devices this driver would match - * @driver: the PA-RISC driver to try - * - * Use by IOMMU support to "guess" the right size IOPdir. - * Formula is something like memsize/(num_iommu * entry_size). - */ -int count_parisc_driver(struct parisc_driver *driver) -{ - struct match_count m = { - .driver = driver, - .count = 0, - }; - - for_each_padev(match_and_count, &m); - - return m.count; -} - - - -/** - * unregister_parisc_driver - Unregister this driver from the list of drivers - * @driver: the PA-RISC driver to unregister - */ -int unregister_parisc_driver(struct parisc_driver *driver) -{ - driver_unregister(&driver->drv); - return 0; -} -EXPORT_SYMBOL(unregister_parisc_driver); - -struct find_data { - unsigned long hpa; - struct parisc_device * dev; -}; - -static int find_device(struct device * dev, void * data) -{ - struct parisc_device * pdev = to_parisc_device(dev); - struct find_data * d = (struct find_data*)data; - - if (check_dev(dev)) { - if (pdev->hpa.start == d->hpa) { - d->dev = pdev; - return 1; - } - } - return 0; -} - -static struct parisc_device *find_device_by_addr(unsigned long hpa) -{ - struct find_data d = { - .hpa = hpa, - }; - int ret; - - ret = for_each_padev(find_device, &d); - return ret ? d.dev : NULL; -} - -/** - * find_pa_parent_type - Find a parent of a specific type - * @dev: The device to start searching from - * @type: The device type to search for. - * - * 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 *padev, int type) -{ - const struct device *dev = &padev->dev; - while (dev != &root) { - struct parisc_device *candidate = to_parisc_device(dev); - if (candidate->id.hw_type == type) - return candidate; - dev = dev->parent; - } - - return NULL; -} - -#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) { - 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; - } -} - -static char *print_hwpath(struct hardware_path *path, char *output) -{ - int i; - for (i = 0; i < 6; i++) { - if (path->bc[i] == -1) - continue; - output += sprintf(output, "%u/", (unsigned char) path->bc[i]); - } - output += sprintf(output, "%u", (unsigned char) path->mod); - return output; -} - -/** - * print_pa_hwpath - Returns hardware path for PA devices - * dev: The device to return the path for - * output: Pointer to a previously-allocated array to place the path in. - * - * This function fills in the output array with a human-readable path - * to a PA device. This string is compatible with that used by PDC, and - * may be printed on the outside of the box. - */ -char *print_pa_hwpath(struct parisc_device *dev, char *output) -{ - struct hardware_path path; - - get_node_path(dev->dev.parent, &path); - path.mod = dev->hw_path; - return print_hwpath(&path, output); -} -EXPORT_SYMBOL(print_pa_hwpath); - -#if defined(CONFIG_PCI) || defined(CONFIG_ISA) -/** - * 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 *pdev, struct hardware_path *path) -{ - get_node_path(&pdev->dev, path); -} -EXPORT_SYMBOL(get_pci_node_path); - -/** - * print_pci_hwpath - 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. - * - * This function fills in the output array with a human-readable path - * to a PCI device. This string is compatible with that used by PDC, and - * may be printed on the outside of the box. - */ -char *print_pci_hwpath(struct pci_dev *dev, char *output) -{ - struct hardware_path path; - - get_pci_node_path(dev, &path); - return print_hwpath(&path, output); -} -EXPORT_SYMBOL(print_pci_hwpath); - -#endif /* defined(CONFIG_PCI) || defined(CONFIG_ISA) */ - -static void setup_bus_id(struct parisc_device *padev) -{ - struct hardware_path path; - char name[20]; - char *output = name; - int i; - - get_node_path(padev->dev.parent, &path); - - 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); - dev_set_name(&padev->dev, name); -} - -struct parisc_device * create_tree_node(char id, struct device *parent) -{ - struct parisc_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL); - if (!dev) - return NULL; - - dev->hw_path = id; - dev->id.hw_type = HPHW_FAULTY; - - 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; - if (device_register(&dev->dev)) { - kfree(dev); - return NULL; - } - - return dev; -} - -struct match_id_data { - char id; - struct parisc_device * dev; -}; - -static int match_by_id(struct device * dev, void * data) -{ - struct parisc_device * pdev = to_parisc_device(dev); - struct match_id_data * d = data; - - if (pdev->hw_path == d->id) { - d->dev = pdev; - return 1; - } - return 0; -} - -/** - * alloc_tree_node - returns a device entry in the iotree - * @parent: the parent node in the tree - * @id: the element of the module path for this entry - * - * Checks all the children of @parent for a matching @id. If none - * found, it allocates a new device and returns it. - */ -static struct parisc_device * alloc_tree_node(struct device *parent, char id) -{ - struct match_id_data d = { - .id = id, - }; - if (device_for_each_child(parent, &d, match_by_id)) - return d.dev; - else - return create_tree_node(id, parent); -} - -static struct parisc_device *create_parisc_device(struct hardware_path *modpath) -{ - int i; - struct device *parent = &root; - for (i = 0; i < 6; i++) { - if (modpath->bc[i] == -1) - continue; - parent = &alloc_tree_node(parent, modpath->bc[i])->dev; - } - return alloc_tree_node(parent, modpath->mod); -} - -struct parisc_device * -alloc_pa_dev(unsigned long hpa, struct hardware_path *mod_path) -{ - int status; - unsigned long bytecnt; - u8 iodc_data[32]; - struct parisc_device *dev; - const char *name; - - /* Check to make sure this device has not already been added - Ryan */ - if (find_device_by_addr(hpa) != NULL) - return NULL; - - status = pdc_iodc_read(&bytecnt, hpa, 0, &iodc_data, 32); - if (status != PDC_OK) - return NULL; - - dev = create_parisc_device(mod_path); - if (dev->id.hw_type != HPHW_FAULTY) { - printk(KERN_ERR "Two devices have hardware path [%s]. " - "IODC data for second device: " - "%02x%02x%02x%02x%02x%02x\n" - "Rearranging GSC cards sometimes helps\n", - parisc_pathname(dev), iodc_data[0], iodc_data[1], - iodc_data[3], iodc_data[4], iodc_data[5], iodc_data[6]); - return NULL; - } - - dev->id.hw_type = iodc_data[3] & 0x1f; - dev->id.hversion = (iodc_data[0] << 4) | ((iodc_data[1] & 0xf0) >> 4); - dev->id.hversion_rev = iodc_data[1] & 0x0f; - dev->id.sversion = ((iodc_data[4] & 0x0f) << 16) | - (iodc_data[5] << 8) | iodc_data[6]; - dev->hpa.name = parisc_pathname(dev); - dev->hpa.start = hpa; - /* This is awkward. The STI spec says that gfx devices may occupy - * 32MB or 64MB. Unfortunately, we don't know how to tell whether - * it's the former or the latter. Assumptions either way can hurt us. - */ - if (hpa == 0xf4000000 || hpa == 0xf8000000) { - dev->hpa.end = hpa + 0x03ffffff; - } else if (hpa == 0xf6000000 || hpa == 0xfa000000) { - dev->hpa.end = hpa + 0x01ffffff; - } else { - dev->hpa.end = hpa + 0xfff; - } - dev->hpa.flags = IORESOURCE_MEM; - name = parisc_hardware_description(&dev->id); - if (name) { - strlcpy(dev->name, name, sizeof(dev->name)); - } - - /* Silently fail things like mouse ports which are subsumed within - * the keyboard controller - */ - if ((hpa & 0xfff) == 0 && insert_resource(&iomem_resource, &dev->hpa)) - printk("Unable to claim HPA %lx for device %s\n", - hpa, name); - - return dev; -} - -static int parisc_generic_match(struct device *dev, struct device_driver *drv) -{ - return match_device(to_parisc_driver(drv), to_parisc_device(dev)); -} - -static ssize_t make_modalias(struct device *dev, char *buf) -{ - const struct parisc_device *padev = to_parisc_device(dev); - const struct parisc_device_id *id = &padev->id; - - return sprintf(buf, "parisc:t%02Xhv%04Xrev%02Xsv%08X\n", - (u8)id->hw_type, (u16)id->hversion, (u8)id->hversion_rev, - (u32)id->sversion); -} - -static int parisc_uevent(struct device *dev, struct kobj_uevent_env *env) -{ - const struct parisc_device *padev; - char modalias[40]; - - if (!dev) - return -ENODEV; - - padev = to_parisc_device(dev); - if (!padev) - return -ENODEV; - - if (add_uevent_var(env, "PARISC_NAME=%s", padev->name)) - return -ENOMEM; - - make_modalias(dev, modalias); - if (add_uevent_var(env, "MODALIAS=%s", modalias)) - return -ENOMEM; - - return 0; -} - -#define pa_dev_attr(name, field, format_string) \ -static ssize_t name##_show(struct device *dev, struct device_attribute *attr, 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 ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) -{ - return make_modalias(dev, buf); -} - -static struct device_attribute parisc_device_attrs[] = { - __ATTR_RO(irq), - __ATTR_RO(hw_type), - __ATTR_RO(rev), - __ATTR_RO(hversion), - __ATTR_RO(sversion), - __ATTR_RO(modalias), - __ATTR_NULL, -}; - -struct bus_type parisc_bus_type = { - .name = "parisc", - .match = parisc_generic_match, - .uevent = parisc_uevent, - .dev_attrs = parisc_device_attrs, - .probe = parisc_driver_probe, - .remove = parisc_driver_remove, -}; - -/** - * register_parisc_device - Locate a driver to manage this device. - * @dev: The parisc device. - * - * Search the driver list for a driver that is willing to manage - * this device. - */ -int register_parisc_device(struct parisc_device *dev) -{ - if (!dev) - return 0; - - if (dev->driver) - return 1; - - 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); -} - -struct parse_tree_data { - int index; - struct hardware_path * modpath; - struct device * dev; -}; - -static int check_parent(struct device * dev, void * data) -{ - struct parse_tree_data * d = data; - - if (check_dev(dev)) { - if (dev->bus == &parisc_bus_type) { - if (match_parisc_device(dev, d->index, d->modpath)) - d->dev = dev; - } else if (is_pci_dev(dev)) { - if (match_pci_device(dev, d->index, d->modpath)) - d->dev = dev; - } else if (dev->bus == NULL) { - /* we are on a bus bridge */ - struct device *new = parse_tree_node(dev, d->index, d->modpath); - if (new) - d->dev = new; - } - } - return d->dev != NULL; -} - -/** - * 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 parse_tree_data d = { - .index = index, - .modpath = modpath, - }; - - struct recurse_struct recurse_data = { - .obj = &d, - .fn = check_parent, - }; - - if (device_for_each_child(parent, &recurse_data, descend_children)) - /* nothing */; - - return d.dev; -} - -/** - * 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); - -/** - * device_to_hwpath - Populates the hwpath corresponding to the given device. - * @param dev the target device - * @param path pointer to a previously allocated hwpath struct to be filled in - */ -void device_to_hwpath(struct device *dev, struct hardware_path *path) -{ - struct parisc_device *padev; - if (dev->bus == &parisc_bus_type) { - padev = to_parisc_device(dev); - get_node_path(dev->parent, path); - path->mod = padev->hw_path; - } else if (is_pci_dev(dev)) { - get_node_path(dev, path); - } -} -EXPORT_SYMBOL(device_to_hwpath); - -#define BC_PORT_MASK 0x8 -#define BC_LOWER_PORT 0x8 - -#define BUS_CONVERTER(dev) \ - ((dev->id.hw_type == HPHW_IOA) || (dev->id.hw_type == HPHW_BCPORT)) - -#define IS_LOWER_PORT(dev) \ - ((gsc_readl(dev->hpa.start + offsetof(struct bc_module, io_status)) \ - & BC_PORT_MASK) == BC_LOWER_PORT) - -#define MAX_NATIVE_DEVICES 64 -#define NATIVE_DEVICE_OFFSET 0x1000 - -#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)gsc_readl(dev->hpa.start + IO_IO_LOW) -#define READ_IO_IO_HIGH(dev) (unsigned long)(signed int)gsc_readl(dev->hpa.start + IO_IO_HIGH) - -static void walk_native_bus(unsigned long io_io_low, unsigned long io_io_high, - struct device *parent); - -void walk_lower_bus(struct parisc_device *dev) -{ - unsigned long io_io_low, io_io_high; - - if (!BUS_CONVERTER(dev) || IS_LOWER_PORT(dev)) - return; - - if (dev->id.hw_type == HPHW_IOA) { - io_io_low = (unsigned long)(signed int)(READ_IO_IO_LOW(dev) << 16); - io_io_high = io_io_low + MAX_NATIVE_DEVICES * NATIVE_DEVICE_OFFSET; - } else { - io_io_low = (READ_IO_IO_LOW(dev) + ~FLEX_MASK) & FLEX_MASK; - io_io_high = (READ_IO_IO_HIGH(dev)+ ~FLEX_MASK) & FLEX_MASK; - } - - walk_native_bus(io_io_low, io_io_high, &dev->dev); -} - -/** - * walk_native_bus -- Probe a bus for devices - * @io_io_low: Base address of this bus. - * @io_io_high: Last address of this bus. - * @parent: The parent bus device. - * - * A native bus (eg Runway or GSC) may have up to 64 devices on it, - * spaced at intervals of 0x1000 bytes. PDC may not inform us of these - * devices, so we have to probe for them. Unfortunately, we may find - * devices which are not physically connected (such as extra serial & - * keyboard ports). This problem is not yet solved. - */ -static void walk_native_bus(unsigned long io_io_low, unsigned long io_io_high, - struct device *parent) -{ - int i, devices_found = 0; - unsigned long hpa = io_io_low; - struct hardware_path path; - - get_node_path(parent, &path); - do { - for(i = 0; i < MAX_NATIVE_DEVICES; i++, hpa += NATIVE_DEVICE_OFFSET) { - struct parisc_device *dev; - - /* Was the device already added by Firmware? */ - dev = find_device_by_addr(hpa); - if (!dev) { - path.mod = i; - dev = alloc_pa_dev(hpa, &path); - if (!dev) - continue; - - register_parisc_device(dev); - devices_found++; - } - walk_lower_bus(dev); - } - } while(!devices_found && hpa < io_io_high); -} - -#define CENTRAL_BUS_ADDR F_EXTEND(0xfff80000) - -/** - * walk_central_bus - Find devices attached to the central bus - * - * PDC doesn't tell us about all devices in the system. This routine - * finds devices connected to the central bus. - */ -void walk_central_bus(void) -{ - walk_native_bus(CENTRAL_BUS_ADDR, - CENTRAL_BUS_ADDR + (MAX_NATIVE_DEVICES * NATIVE_DEVICE_OFFSET), - &root); -} - -static void print_parisc_device(struct parisc_device *dev) -{ - char hw_path[64]; - static int count; - - print_pa_hwpath(dev, hw_path); - printk(KERN_INFO "%d. %s at 0x%p [%s] { %d, 0x%x, 0x%.3x, 0x%.5x }", - ++count, dev->name, (void*) dev->hpa.start, hw_path, dev->id.hw_type, - dev->id.hversion_rev, dev->id.hversion, dev->id.sversion); - - if (dev->num_addrs) { - int k; - printk(", additional addresses: "); - for (k = 0; k < dev->num_addrs; k++) - printk("0x%lx ", dev->addr[k]); - } - printk("\n"); -} - -/** - * init_parisc_bus - Some preparation to be done before inventory - */ -void init_parisc_bus(void) -{ - if (bus_register(&parisc_bus_type)) - panic("Could not register PA-RISC bus type\n"); - if (device_register(&root)) - panic("Could not register PA-RISC root device\n"); - get_device(&root); -} - - -static int print_one_device(struct device * dev, void * data) -{ - struct parisc_device * pdev = to_parisc_device(dev); - - if (check_dev(dev)) - print_parisc_device(pdev); - return 0; -} - -/** - * print_parisc_devices - Print out a list of devices found in this system - */ -void print_parisc_devices(void) -{ - for_each_padev(print_one_device, NULL); -} |