![Helge Deller](/assets/img/avatar_default.png)
parisc: add uevent helper for parisc bus udev device-driver auto detection was failing to work on the GSC bus, since udev didn't knew wich driver to load due to a missing MODALIAS environment variable from kernel. This patch fixes this by adding the MODALIAS environment variable to the uevent kernel notifications. Since modalias_show() generated the modalias string already, I splitted this out and created a new static function make_modalias() which is now used by modalias_show() and the new parisc_uevent() function. Tested on 715/64 and c3000. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
923 lines
24 KiB
C
923 lines
24 KiB
C
/*
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* drivers.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Copyright (c) 1999 The Puffin Group
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* Copyright (c) 2001 Matthew Wilcox for Hewlett Packard
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* Copyright (c) 2001 Helge Deller <deller@gmx.de>
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* Copyright (c) 2001,2002 Ryan Bradetich
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* Copyright (c) 2004-2005 Thibaut VARENE <varenet@parisc-linux.org>
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*
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* The file handles registering devices and drivers, then matching them.
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* It's the closest we get to a dating agency.
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*
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* If you're thinking about modifying this file, here are some gotchas to
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* bear in mind:
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* - 715/Mirage device paths have a dummy device between Lasi and its children
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* - The EISA adapter may show up as a sibling or child of Wax
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* - Dino has an optionally functional serial port. If firmware enables it,
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* it shows up as a child of Dino. If firmware disables it, the buswalk
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* finds it and it shows up as a child of Cujo
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* - Dino has both parisc and pci devices as children
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* - parisc devices are discovered in a random order, including children
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* before parents in some cases.
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*/
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/pdc.h>
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#include <asm/parisc-device.h>
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/* See comments in include/asm-parisc/pci.h */
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struct hppa_dma_ops *hppa_dma_ops __read_mostly;
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EXPORT_SYMBOL(hppa_dma_ops);
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static struct device root = {
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.init_name = "parisc",
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};
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static inline int check_dev(struct device *dev)
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{
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if (dev->bus == &parisc_bus_type) {
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struct parisc_device *pdev;
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pdev = to_parisc_device(dev);
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return pdev->id.hw_type != HPHW_FAULTY;
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}
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return 1;
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}
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static struct device *
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parse_tree_node(struct device *parent, int index, struct hardware_path *modpath);
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struct recurse_struct {
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void * obj;
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int (*fn)(struct device *, void *);
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};
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static int descend_children(struct device * dev, void * data)
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{
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struct recurse_struct * recurse_data = (struct recurse_struct *)data;
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if (recurse_data->fn(dev, recurse_data->obj))
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return 1;
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else
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return device_for_each_child(dev, recurse_data, descend_children);
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}
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/**
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* for_each_padev - Iterate over all devices in the tree
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* @fn: Function to call for each device.
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* @data: Data to pass to the called function.
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*
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* This performs a depth-first traversal of the tree, calling the
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* function passed for each node. It calls the function for parents
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* before children.
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*/
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static int for_each_padev(int (*fn)(struct device *, void *), void * data)
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{
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struct recurse_struct recurse_data = {
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.obj = data,
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.fn = fn,
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};
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return device_for_each_child(&root, &recurse_data, descend_children);
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}
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/**
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* match_device - Report whether this driver can handle this device
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* @driver: the PA-RISC driver to try
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* @dev: the PA-RISC device to try
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*/
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static int match_device(struct parisc_driver *driver, struct parisc_device *dev)
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{
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const struct parisc_device_id *ids;
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for (ids = driver->id_table; ids->sversion; ids++) {
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if ((ids->sversion != SVERSION_ANY_ID) &&
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(ids->sversion != dev->id.sversion))
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continue;
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if ((ids->hw_type != HWTYPE_ANY_ID) &&
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(ids->hw_type != dev->id.hw_type))
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continue;
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if ((ids->hversion != HVERSION_ANY_ID) &&
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(ids->hversion != dev->id.hversion))
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continue;
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return 1;
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}
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return 0;
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}
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static int parisc_driver_probe(struct device *dev)
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{
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int rc;
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struct parisc_device *pa_dev = to_parisc_device(dev);
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struct parisc_driver *pa_drv = to_parisc_driver(dev->driver);
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rc = pa_drv->probe(pa_dev);
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if (!rc)
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pa_dev->driver = pa_drv;
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return rc;
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}
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static int parisc_driver_remove(struct device *dev)
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{
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struct parisc_device *pa_dev = to_parisc_device(dev);
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struct parisc_driver *pa_drv = to_parisc_driver(dev->driver);
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if (pa_drv->remove)
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pa_drv->remove(pa_dev);
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return 0;
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}
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/**
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* register_parisc_driver - Register this driver if it can handle a device
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* @driver: the PA-RISC driver to try
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*/
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int register_parisc_driver(struct parisc_driver *driver)
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{
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/* FIXME: we need this because apparently the sti
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* driver can be registered twice */
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if(driver->drv.name) {
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printk(KERN_WARNING
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"BUG: skipping previously registered driver %s\n",
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driver->name);
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return 1;
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}
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if (!driver->probe) {
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printk(KERN_WARNING
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"BUG: driver %s has no probe routine\n",
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driver->name);
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return 1;
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}
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driver->drv.bus = &parisc_bus_type;
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/* We install our own probe and remove routines */
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WARN_ON(driver->drv.probe != NULL);
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WARN_ON(driver->drv.remove != NULL);
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driver->drv.name = driver->name;
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return driver_register(&driver->drv);
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}
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EXPORT_SYMBOL(register_parisc_driver);
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struct match_count {
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struct parisc_driver * driver;
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int count;
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};
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static int match_and_count(struct device * dev, void * data)
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{
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struct match_count * m = data;
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struct parisc_device * pdev = to_parisc_device(dev);
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if (check_dev(dev)) {
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if (match_device(m->driver, pdev))
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m->count++;
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}
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return 0;
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}
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/**
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* count_parisc_driver - count # of devices this driver would match
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* @driver: the PA-RISC driver to try
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*
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* Use by IOMMU support to "guess" the right size IOPdir.
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* Formula is something like memsize/(num_iommu * entry_size).
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*/
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int count_parisc_driver(struct parisc_driver *driver)
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{
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struct match_count m = {
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.driver = driver,
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.count = 0,
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};
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for_each_padev(match_and_count, &m);
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return m.count;
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}
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/**
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* unregister_parisc_driver - Unregister this driver from the list of drivers
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* @driver: the PA-RISC driver to unregister
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*/
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int unregister_parisc_driver(struct parisc_driver *driver)
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{
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driver_unregister(&driver->drv);
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return 0;
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}
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EXPORT_SYMBOL(unregister_parisc_driver);
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struct find_data {
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unsigned long hpa;
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struct parisc_device * dev;
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};
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static int find_device(struct device * dev, void * data)
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{
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struct parisc_device * pdev = to_parisc_device(dev);
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struct find_data * d = (struct find_data*)data;
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if (check_dev(dev)) {
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if (pdev->hpa.start == d->hpa) {
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d->dev = pdev;
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return 1;
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}
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}
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return 0;
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}
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static struct parisc_device *find_device_by_addr(unsigned long hpa)
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{
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struct find_data d = {
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.hpa = hpa,
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};
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int ret;
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ret = for_each_padev(find_device, &d);
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return ret ? d.dev : NULL;
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}
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/**
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* find_pa_parent_type - Find a parent of a specific type
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* @dev: The device to start searching from
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* @type: The device type to search for.
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*
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* Walks up the device tree looking for a device of the specified type.
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* If it finds it, it returns it. If not, it returns NULL.
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*/
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const struct parisc_device *
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find_pa_parent_type(const struct parisc_device *padev, int type)
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{
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const struct device *dev = &padev->dev;
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while (dev != &root) {
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struct parisc_device *candidate = to_parisc_device(dev);
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if (candidate->id.hw_type == type)
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return candidate;
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dev = dev->parent;
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}
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return NULL;
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}
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#ifdef CONFIG_PCI
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static inline int is_pci_dev(struct device *dev)
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{
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return dev->bus == &pci_bus_type;
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}
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#else
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static inline int is_pci_dev(struct device *dev)
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{
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return 0;
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}
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#endif
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/*
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* get_node_path fills in @path with the firmware path to the device.
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* Note that if @node is a parisc device, we don't fill in the 'mod' field.
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* This is because both callers pass the parent and fill in the mod
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* themselves. If @node is a PCI device, we do fill it in, even though this
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* is inconsistent.
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*/
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static void get_node_path(struct device *dev, struct hardware_path *path)
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{
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int i = 5;
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memset(&path->bc, -1, 6);
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if (is_pci_dev(dev)) {
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unsigned int devfn = to_pci_dev(dev)->devfn;
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path->mod = PCI_FUNC(devfn);
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path->bc[i--] = PCI_SLOT(devfn);
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dev = dev->parent;
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}
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while (dev != &root) {
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if (is_pci_dev(dev)) {
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unsigned int devfn = to_pci_dev(dev)->devfn;
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path->bc[i--] = PCI_SLOT(devfn) | (PCI_FUNC(devfn)<< 5);
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} else if (dev->bus == &parisc_bus_type) {
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path->bc[i--] = to_parisc_device(dev)->hw_path;
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}
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dev = dev->parent;
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}
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}
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static char *print_hwpath(struct hardware_path *path, char *output)
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{
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int i;
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for (i = 0; i < 6; i++) {
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if (path->bc[i] == -1)
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continue;
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output += sprintf(output, "%u/", (unsigned char) path->bc[i]);
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}
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output += sprintf(output, "%u", (unsigned char) path->mod);
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return output;
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}
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/**
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* print_pa_hwpath - Returns hardware path for PA devices
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* dev: The device to return the path for
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* output: Pointer to a previously-allocated array to place the path in.
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*
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* This function fills in the output array with a human-readable path
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* to a PA device. This string is compatible with that used by PDC, and
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* may be printed on the outside of the box.
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*/
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char *print_pa_hwpath(struct parisc_device *dev, char *output)
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{
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struct hardware_path path;
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get_node_path(dev->dev.parent, &path);
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path.mod = dev->hw_path;
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return print_hwpath(&path, output);
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}
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EXPORT_SYMBOL(print_pa_hwpath);
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#if defined(CONFIG_PCI) || defined(CONFIG_ISA)
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/**
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* get_pci_node_path - Determines the hardware path for a PCI device
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* @pdev: The device to return the path for
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* @path: Pointer to a previously-allocated array to place the path in.
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*
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* This function fills in the hardware_path structure with the route to
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* the specified PCI device. This structure is suitable for passing to
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* PDC calls.
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*/
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void get_pci_node_path(struct pci_dev *pdev, struct hardware_path *path)
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{
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get_node_path(&pdev->dev, path);
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}
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EXPORT_SYMBOL(get_pci_node_path);
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/**
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* print_pci_hwpath - Returns hardware path for PCI devices
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* dev: The device to return the path for
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* output: Pointer to a previously-allocated array to place the path in.
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*
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* This function fills in the output array with a human-readable path
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* to a PCI device. This string is compatible with that used by PDC, and
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* may be printed on the outside of the box.
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*/
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char *print_pci_hwpath(struct pci_dev *dev, char *output)
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{
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struct hardware_path path;
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get_pci_node_path(dev, &path);
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return print_hwpath(&path, output);
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}
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EXPORT_SYMBOL(print_pci_hwpath);
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#endif /* defined(CONFIG_PCI) || defined(CONFIG_ISA) */
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static void setup_bus_id(struct parisc_device *padev)
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{
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struct hardware_path path;
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char name[20];
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char *output = name;
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int i;
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get_node_path(padev->dev.parent, &path);
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for (i = 0; i < 6; i++) {
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if (path.bc[i] == -1)
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continue;
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output += sprintf(output, "%u:", (unsigned char) path.bc[i]);
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}
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sprintf(output, "%u", (unsigned char) padev->hw_path);
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dev_set_name(&padev->dev, name);
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}
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struct parisc_device * create_tree_node(char id, struct device *parent)
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{
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struct parisc_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return NULL;
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dev->hw_path = id;
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dev->id.hw_type = HPHW_FAULTY;
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dev->dev.parent = parent;
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setup_bus_id(dev);
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dev->dev.bus = &parisc_bus_type;
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dev->dma_mask = 0xffffffffUL; /* PARISC devices are 32-bit */
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/* make the generic dma mask a pointer to the parisc one */
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dev->dev.dma_mask = &dev->dma_mask;
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dev->dev.coherent_dma_mask = dev->dma_mask;
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if (device_register(&dev->dev)) {
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kfree(dev);
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return NULL;
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}
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return dev;
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}
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struct match_id_data {
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char id;
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struct parisc_device * dev;
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};
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static int match_by_id(struct device * dev, void * data)
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{
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struct parisc_device * pdev = to_parisc_device(dev);
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struct match_id_data * d = data;
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if (pdev->hw_path == d->id) {
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d->dev = pdev;
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return 1;
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}
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return 0;
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}
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/**
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* alloc_tree_node - returns a device entry in the iotree
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* @parent: the parent node in the tree
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* @id: the element of the module path for this entry
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*
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* Checks all the children of @parent for a matching @id. If none
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* found, it allocates a new device and returns it.
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*/
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static struct parisc_device * alloc_tree_node(struct device *parent, char id)
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{
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struct match_id_data d = {
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.id = id,
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};
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if (device_for_each_child(parent, &d, match_by_id))
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return d.dev;
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else
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return create_tree_node(id, parent);
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}
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static struct parisc_device *create_parisc_device(struct hardware_path *modpath)
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{
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int i;
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struct device *parent = &root;
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for (i = 0; i < 6; i++) {
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if (modpath->bc[i] == -1)
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continue;
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parent = &alloc_tree_node(parent, modpath->bc[i])->dev;
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}
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return alloc_tree_node(parent, modpath->mod);
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}
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struct parisc_device *
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alloc_pa_dev(unsigned long hpa, struct hardware_path *mod_path)
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{
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int status;
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unsigned long bytecnt;
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u8 iodc_data[32];
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struct parisc_device *dev;
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const char *name;
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/* Check to make sure this device has not already been added - Ryan */
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if (find_device_by_addr(hpa) != NULL)
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return NULL;
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status = pdc_iodc_read(&bytecnt, hpa, 0, &iodc_data, 32);
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if (status != PDC_OK)
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return NULL;
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dev = create_parisc_device(mod_path);
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if (dev->id.hw_type != HPHW_FAULTY) {
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printk(KERN_ERR "Two devices have hardware path [%s]. "
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"IODC data for second device: "
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"%02x%02x%02x%02x%02x%02x\n"
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"Rearranging GSC cards sometimes helps\n",
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parisc_pathname(dev), iodc_data[0], iodc_data[1],
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iodc_data[3], iodc_data[4], iodc_data[5], iodc_data[6]);
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return NULL;
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}
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dev->id.hw_type = iodc_data[3] & 0x1f;
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dev->id.hversion = (iodc_data[0] << 4) | ((iodc_data[1] & 0xf0) >> 4);
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dev->id.hversion_rev = iodc_data[1] & 0x0f;
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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);
|
|
}
|