| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * drivers.c |
| * |
| * 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 <linux/dma-map-ops.h> |
| #include <asm/hardware.h> |
| #include <asm/io.h> |
| #include <asm/pdc.h> |
| #include <asm/parisc-device.h> |
| #include <asm/ropes.h> |
| |
| /* See comments in include/asm-parisc/pci.h */ |
| const struct dma_map_ops *hppa_dma_ops __ro_after_init; |
| 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 void __exit 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); |
| } |
| |
| |
| /** |
| * 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) { |
| pr_warn("BUG: skipping previously registered driver %s\n", |
| driver->name); |
| return 1; |
| } |
| |
| if (!driver->probe) { |
| pr_warn("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 __init 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; |
| } |
| |
| static int __init is_IKE_device(struct device *dev, void *data) |
| { |
| struct parisc_device *pdev = to_parisc_device(dev); |
| |
| if (!check_dev(dev)) |
| return 0; |
| if (pdev->id.hw_type != HPHW_BCPORT) |
| return 0; |
| if (IS_IKE(pdev) || |
| (pdev->id.hversion == REO_MERCED_PORT) || |
| (pdev->id.hversion == REOG_MERCED_PORT)) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| int __init machine_has_merced_bus(void) |
| { |
| int ret; |
| |
| ret = for_each_padev(is_IKE_device, NULL); |
| return ret ? 1 : 0; |
| } |
| |
| /** |
| * 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; |
| } |
| |
| /* |
| * 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 (dev_is_pci(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 (dev_is_pci(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[28]; |
| 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 * __init 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 * __init 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 * __init |
| 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) { |
| pr_err("Two devices have hardware path [%s]. IODC data for second device: %7phN\n" |
| "Rearranging GSC cards sometimes helps\n", |
| parisc_pathname(dev), iodc_data); |
| 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.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; |
| dev->hpa.name = dev->name; |
| name = parisc_hardware_description(&dev->id) ? : "unknown"; |
| snprintf(dev->name, sizeof(dev->name), "%s [%s]", |
| name, parisc_pathname(dev)); |
| |
| /* Silently fail things like mouse ports which are subsumed within |
| * the keyboard controller |
| */ |
| if ((hpa & 0xfff) == 0 && insert_resource(&iomem_resource, &dev->hpa)) |
| pr_warn("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); \ |
| } \ |
| static DEVICE_ATTR_RO(name); |
| |
| #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 DEVICE_ATTR_RO(modalias); |
| |
| static struct attribute *parisc_device_attrs[] = { |
| &dev_attr_irq.attr, |
| &dev_attr_hw_type.attr, |
| &dev_attr_rev.attr, |
| &dev_attr_hversion.attr, |
| &dev_attr_sversion.attr, |
| &dev_attr_modalias.attr, |
| NULL, |
| }; |
| ATTRIBUTE_GROUPS(parisc_device); |
| |
| struct bus_type parisc_bus_type = { |
| .name = "parisc", |
| .match = parisc_generic_match, |
| .uevent = parisc_uevent, |
| .dev_groups = parisc_device_groups, |
| .probe = parisc_driver_probe, |
| .remove = __exit_p(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 __init 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))); |
| } |
| |
| /* index might be out of bounds for bc[] */ |
| if (index >= 6) |
| return 0; |
| |
| 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 (dev_is_pci(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 (dev_is_pci(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 (dev_is_pci(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); |
| |
| static void __init 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 __init 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 __init walk_central_bus(void) |
| { |
| walk_native_bus(CENTRAL_BUS_ADDR, |
| CENTRAL_BUS_ADDR + (MAX_NATIVE_DEVICES * NATIVE_DEVICE_OFFSET), |
| &root); |
| } |
| |
| static __init void print_parisc_device(struct parisc_device *dev) |
| { |
| static int count __initdata; |
| |
| pr_info("%d. %s at %pap { type:%d, hv:%#x, sv:%#x, rev:%#x }", |
| ++count, dev->name, &(dev->hpa.start), dev->id.hw_type, |
| dev->id.hversion, dev->id.sversion, dev->id.hversion_rev); |
| |
| if (dev->num_addrs) { |
| int k; |
| pr_cont(", additional addresses: "); |
| for (k = 0; k < dev->num_addrs; k++) |
| pr_cont("0x%lx ", dev->addr[k]); |
| } |
| pr_cont("\n"); |
| } |
| |
| /** |
| * init_parisc_bus - Some preparation to be done before inventory |
| */ |
| void __init 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 __init void qemu_header(void) |
| { |
| int num; |
| unsigned long *p; |
| |
| pr_info("--- cut here ---\n"); |
| pr_info("/* AUTO-GENERATED HEADER FILE FOR SEABIOS FIRMWARE */\n"); |
| pr_cont("/* generated with Linux kernel */\n"); |
| pr_cont("/* search for PARISC_QEMU_MACHINE_HEADER in Linux */\n\n"); |
| |
| pr_info("#define PARISC_MODEL \"%s\"\n\n", |
| boot_cpu_data.pdc.sys_model_name); |
| |
| pr_info("#define PARISC_PDC_MODEL 0x%lx, 0x%lx, 0x%lx, " |
| "0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx\n\n", |
| #define p ((unsigned long *)&boot_cpu_data.pdc.model) |
| p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]); |
| #undef p |
| |
| pr_info("#define PARISC_PDC_VERSION 0x%04lx\n\n", |
| boot_cpu_data.pdc.versions); |
| |
| pr_info("#define PARISC_PDC_CPUID 0x%04lx\n\n", |
| boot_cpu_data.pdc.cpuid); |
| |
| pr_info("#define PARISC_PDC_CAPABILITIES 0x%04lx\n\n", |
| boot_cpu_data.pdc.capabilities); |
| |
| pr_info("#define PARISC_PDC_ENTRY_ORG 0x%04lx\n\n", |
| #ifdef CONFIG_64BIT |
| (unsigned long)(PAGE0->mem_pdc_hi) << 32 | |
| #endif |
| (unsigned long)PAGE0->mem_pdc); |
| |
| pr_info("#define PARISC_PDC_CACHE_INFO"); |
| p = (unsigned long *) &cache_info; |
| for (num = 0; num < sizeof(cache_info); num += sizeof(unsigned long)) { |
| if (((num % 5) == 0)) { |
| pr_cont(" \\\n"); |
| pr_info("\t"); |
| } |
| pr_cont("%s0x%04lx", |
| num?", ":"", *p++); |
| } |
| pr_cont("\n\n"); |
| } |
| |
| static __init int qemu_print_hpa(struct device *lin_dev, void *data) |
| { |
| struct parisc_device *dev = to_parisc_device(lin_dev); |
| unsigned long hpa = dev->hpa.start; |
| |
| pr_cont("\t{\t.hpa = 0x%08lx,\\\n", hpa); |
| pr_cont("\t\t.iodc = &iodc_data_hpa_%08lx,\\\n", hpa); |
| pr_cont("\t\t.mod_info = &mod_info_hpa_%08lx,\\\n", hpa); |
| pr_cont("\t\t.mod_path = &mod_path_hpa_%08lx,\\\n", hpa); |
| pr_cont("\t\t.num_addr = HPA_%08lx_num_addr,\\\n", hpa); |
| pr_cont("\t\t.add_addr = { HPA_%08lx_add_addr } },\\\n", hpa); |
| return 0; |
| } |
| |
| |
| static __init void qemu_footer(void) |
| { |
| pr_info("\n\n#define PARISC_DEVICE_LIST \\\n"); |
| for_each_padev(qemu_print_hpa, NULL); |
| pr_cont("\t{ 0, }\n"); |
| pr_info("--- cut here ---\n"); |
| } |
| |
| /* print iodc data of the various hpa modules for qemu inclusion */ |
| static __init int qemu_print_iodc_data(struct device *lin_dev, void *data) |
| { |
| struct parisc_device *dev = to_parisc_device(lin_dev); |
| unsigned long count; |
| unsigned long hpa = dev->hpa.start; |
| int status; |
| struct pdc_iodc iodc_data; |
| |
| int mod_index; |
| struct pdc_system_map_mod_info pdc_mod_info; |
| struct pdc_module_path mod_path; |
| |
| status = pdc_iodc_read(&count, hpa, 0, |
| &iodc_data, sizeof(iodc_data)); |
| if (status != PDC_OK) { |
| pr_info("No IODC data for hpa 0x%08lx\n", hpa); |
| return 0; |
| } |
| |
| pr_info("\n"); |
| |
| pr_info("#define HPA_%08lx_DESCRIPTION \"%s\"\n", |
| hpa, parisc_hardware_description(&dev->id)); |
| |
| mod_index = 0; |
| do { |
| status = pdc_system_map_find_mods(&pdc_mod_info, |
| &mod_path, mod_index++); |
| } while (status == PDC_OK && pdc_mod_info.mod_addr != hpa); |
| |
| pr_info("static struct pdc_system_map_mod_info" |
| " mod_info_hpa_%08lx = {\n", hpa); |
| #define DO(member) \ |
| pr_cont("\t." #member " = 0x%x,\n", \ |
| (unsigned int)pdc_mod_info.member) |
| DO(mod_addr); |
| DO(mod_pgs); |
| DO(add_addrs); |
| pr_cont("};\n"); |
| #undef DO |
| pr_info("static struct pdc_module_path " |
| "mod_path_hpa_%08lx = {\n", hpa); |
| pr_cont("\t.path = { "); |
| pr_cont(".flags = 0x%x, ", mod_path.path.flags); |
| pr_cont(".bc = { 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x }, ", |
| (unsigned char)mod_path.path.bc[0], |
| (unsigned char)mod_path.path.bc[1], |
| (unsigned char)mod_path.path.bc[2], |
| (unsigned char)mod_path.path.bc[3], |
| (unsigned char)mod_path.path.bc[4], |
| (unsigned char)mod_path.path.bc[5]); |
| pr_cont(".mod = 0x%x ", mod_path.path.mod); |
| pr_cont(" },\n"); |
| pr_cont("\t.layers = { 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x }\n", |
| mod_path.layers[0], mod_path.layers[1], mod_path.layers[2], |
| mod_path.layers[3], mod_path.layers[4], mod_path.layers[5]); |
| pr_cont("};\n"); |
| |
| pr_info("static struct pdc_iodc iodc_data_hpa_%08lx = {\n", hpa); |
| #define DO(member) \ |
| pr_cont("\t." #member " = 0x%04lx,\n", \ |
| (unsigned long)iodc_data.member) |
| DO(hversion_model); |
| DO(hversion); |
| DO(spa); |
| DO(type); |
| DO(sversion_rev); |
| DO(sversion_model); |
| DO(sversion_opt); |
| DO(rev); |
| DO(dep); |
| DO(features); |
| DO(checksum); |
| DO(length); |
| #undef DO |
| pr_cont("\t/* pad: 0x%04x, 0x%04x */\n", |
| iodc_data.pad[0], iodc_data.pad[1]); |
| pr_cont("};\n"); |
| |
| pr_info("#define HPA_%08lx_num_addr %d\n", hpa, dev->num_addrs); |
| pr_info("#define HPA_%08lx_add_addr ", hpa); |
| count = 0; |
| if (dev->num_addrs == 0) |
| pr_cont("0"); |
| while (count < dev->num_addrs) { |
| pr_cont("0x%08lx, ", dev->addr[count]); |
| count++; |
| } |
| pr_cont("\n\n"); |
| |
| return 0; |
| } |
| |
| |
| |
| static __init 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 __init print_parisc_devices(void) |
| { |
| for_each_padev(print_one_device, NULL); |
| #define PARISC_QEMU_MACHINE_HEADER 0 |
| if (PARISC_QEMU_MACHINE_HEADER) { |
| qemu_header(); |
| for_each_padev(qemu_print_iodc_data, NULL); |
| qemu_footer(); |
| } |
| } |