firewire: Add device probing and sysfs integration.
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
parent
3038e353cf
commit
19a15b937b
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@ -2,6 +2,7 @@
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# Makefile for the Linux IEEE 1394 implementation
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#
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fw-core-objs := fw-card.o fw-topology.o fw-transaction.o fw-iso.o
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fw-core-objs := fw-card.o fw-topology.o fw-transaction.o fw-iso.o \
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fw-device.o fw-device-cdev.o
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obj-$(CONFIG_FW) += fw-core.o
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@ -24,6 +24,7 @@
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#include <linux/device.h>
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#include "fw-transaction.h"
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#include "fw-topology.h"
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#include "fw-device.h"
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/* The lib/crc16.c implementation uses the standard (0x8005)
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* polynomial, but we need the ITU-T (or CCITT) polynomial (0x1021).
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@ -185,6 +186,59 @@ fw_core_remove_descriptor (struct fw_descriptor *desc)
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}
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EXPORT_SYMBOL(fw_core_remove_descriptor);
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static void
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fw_card_irm_work(struct work_struct *work)
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{
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struct fw_card *card =
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container_of(work, struct fw_card, work.work);
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struct fw_device *root;
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unsigned long flags;
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int new_irm_id, generation;
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/* FIXME: This simple bus management unconditionally picks a
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* cycle master if the current root can't do it. We need to
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* not do this if there is a bus manager already. Also, some
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* hubs set the contender bit, which is bogus, so we should
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* probably do a little sanity check on the IRM (like, read
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* the bandwidth register) if it's not us. */
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spin_lock_irqsave(&card->lock, flags);
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generation = card->generation;
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root = card->root_node->data;
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if (root == NULL)
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/* Either link_on is false, or we failed to read the
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* config rom. In either case, pick another root. */
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new_irm_id = card->local_node->node_id;
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else if (root->state != FW_DEVICE_RUNNING)
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/* If we haven't probed this device yet, bail out now
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* and let's try again once that's done. */
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new_irm_id = -1;
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else if (root->config_rom[2] & bib_cmc)
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/* FIXME: I suppose we should set the cmstr bit in the
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* STATE_CLEAR register of this node, as described in
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* 1394-1995, 8.4.2.6. Also, send out a force root
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* packet for this node. */
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new_irm_id = -1;
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else
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/* Current root has an active link layer and we
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* successfully read the config rom, but it's not
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* cycle master capable. */
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new_irm_id = card->local_node->node_id;
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if (card->irm_retries++ > 5)
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new_irm_id = -1;
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spin_unlock_irqrestore(&card->lock, flags);
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if (new_irm_id > 0) {
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fw_notify("Trying to become root (card %d)\n", card->index);
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fw_send_force_root(card, new_irm_id, generation);
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fw_core_initiate_bus_reset(card, 1);
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}
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}
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static void
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release_card(struct device *device)
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{
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@ -222,6 +276,8 @@ fw_card_initialize(struct fw_card *card, struct fw_card_driver *driver,
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card->local_node = NULL;
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INIT_DELAYED_WORK(&card->work, fw_card_irm_work);
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card->card_device.bus = &fw_bus_type;
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card->card_device.release = release_card;
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card->card_device.parent = card->device;
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617
drivers/firewire/fw-device-cdev.c
Normal file
617
drivers/firewire/fw-device-cdev.c
Normal file
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/* -*- c-basic-offset: 8 -*-
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*
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* fw-device-cdev.c - Char device for device raw access
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*
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* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/wait.h>
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#include <linux/errno.h>
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#include <linux/device.h>
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#include <linux/vmalloc.h>
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#include <linux/poll.h>
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#include <linux/delay.h>
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#include <linux/mm.h>
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#include <linux/compat.h>
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#include <asm/uaccess.h>
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#include "fw-transaction.h"
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#include "fw-topology.h"
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#include "fw-device.h"
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#include "fw-device-cdev.h"
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/*
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* todo
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*
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* - bus resets sends a new packet with new generation and node id
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*
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*/
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/* dequeue_event() just kfree()'s the event, so the event has to be
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* the first field in the struct. */
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struct event {
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struct { void *data; size_t size; } v[2];
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struct list_head link;
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};
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struct response {
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struct event event;
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struct fw_transaction transaction;
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struct client *client;
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struct fw_cdev_event_response response;
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};
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struct iso_interrupt {
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struct event event;
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struct fw_cdev_event_iso_interrupt interrupt;
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};
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struct client {
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struct fw_device *device;
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spinlock_t lock;
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struct list_head handler_list;
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struct list_head request_list;
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u32 request_serial;
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struct list_head event_list;
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struct semaphore event_list_sem;
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wait_queue_head_t wait;
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unsigned long vm_start;
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struct fw_iso_context *iso_context;
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};
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static inline void __user *
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u64_to_uptr(__u64 value)
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{
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return (void __user *)(unsigned long)value;
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}
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static inline __u64
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uptr_to_u64(void __user *ptr)
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{
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return (__u64)(unsigned long)ptr;
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}
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static int fw_device_op_open(struct inode *inode, struct file *file)
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{
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struct fw_device *device;
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struct client *client;
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device = container_of(inode->i_cdev, struct fw_device, cdev);
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client = kzalloc(sizeof *client, GFP_KERNEL);
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if (client == NULL)
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return -ENOMEM;
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client->device = fw_device_get(device);
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INIT_LIST_HEAD(&client->event_list);
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sema_init(&client->event_list_sem, 0);
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INIT_LIST_HEAD(&client->handler_list);
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INIT_LIST_HEAD(&client->request_list);
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spin_lock_init(&client->lock);
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init_waitqueue_head(&client->wait);
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file->private_data = client;
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return 0;
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}
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static void queue_event(struct client *client, struct event *event,
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void *data0, size_t size0, void *data1, size_t size1)
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{
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unsigned long flags;
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event->v[0].data = data0;
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event->v[0].size = size0;
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event->v[1].data = data1;
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event->v[1].size = size1;
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spin_lock_irqsave(&client->lock, flags);
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list_add_tail(&event->link, &client->event_list);
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up(&client->event_list_sem);
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wake_up_interruptible(&client->wait);
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spin_unlock_irqrestore(&client->lock, flags);
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}
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static int dequeue_event(struct client *client, char __user *buffer, size_t count)
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{
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unsigned long flags;
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struct event *event;
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size_t size, total;
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int i, retval = -EFAULT;
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if (down_interruptible(&client->event_list_sem) < 0)
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return -EINTR;
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spin_lock_irqsave(&client->lock, flags);
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event = container_of(client->event_list.next, struct event, link);
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list_del(&event->link);
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spin_unlock_irqrestore(&client->lock, flags);
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if (buffer == NULL)
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goto out;
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total = 0;
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for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
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size = min(event->v[i].size, count - total);
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if (copy_to_user(buffer + total, event->v[i].data, size))
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goto out;
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total += size;
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}
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retval = total;
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out:
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kfree(event);
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return retval;
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}
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static ssize_t
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fw_device_op_read(struct file *file,
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char __user *buffer, size_t count, loff_t *offset)
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{
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struct client *client = file->private_data;
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return dequeue_event(client, buffer, count);
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}
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static int ioctl_config_rom(struct client *client, void __user *arg)
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{
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struct fw_cdev_get_config_rom rom;
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rom.length = client->device->config_rom_length;
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memcpy(rom.data, client->device->config_rom, rom.length * 4);
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if (copy_to_user(arg, &rom,
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(char *)&rom.data[rom.length] - (char *)&rom))
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return -EFAULT;
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return 0;
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}
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static void
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complete_transaction(struct fw_card *card, int rcode,
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void *payload, size_t length, void *data)
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{
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struct response *response = data;
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struct client *client = response->client;
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if (length < response->response.length)
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response->response.length = length;
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if (rcode == RCODE_COMPLETE)
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memcpy(response->response.data, payload,
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response->response.length);
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response->response.type = FW_CDEV_EVENT_RESPONSE;
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response->response.rcode = rcode;
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queue_event(client, &response->event,
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&response->response, sizeof response->response,
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response->response.data, response->response.length);
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}
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static ssize_t ioctl_send_request(struct client *client, void __user *arg)
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{
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struct fw_device *device = client->device;
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struct fw_cdev_send_request request;
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struct response *response;
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if (copy_from_user(&request, arg, sizeof request))
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return -EFAULT;
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/* What is the biggest size we'll accept, really? */
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if (request.length > 4096)
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return -EINVAL;
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response = kmalloc(sizeof *response + request.length, GFP_KERNEL);
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if (response == NULL)
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return -ENOMEM;
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response->client = client;
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response->response.length = request.length;
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response->response.closure = request.closure;
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if (request.data &&
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copy_from_user(response->response.data,
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u64_to_uptr(request.data), request.length)) {
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kfree(response);
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return -EFAULT;
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}
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fw_send_request(device->card, &response->transaction,
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request.tcode,
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device->node->node_id | LOCAL_BUS,
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device->card->generation,
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device->node->max_speed,
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request.offset,
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response->response.data, request.length,
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complete_transaction, response);
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if (request.data)
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return sizeof request + request.length;
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else
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return sizeof request;
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}
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struct address_handler {
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struct fw_address_handler handler;
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__u64 closure;
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struct client *client;
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struct list_head link;
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};
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struct request {
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struct fw_request *request;
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void *data;
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size_t length;
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u32 serial;
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struct list_head link;
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};
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struct request_event {
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struct event event;
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struct fw_cdev_event_request request;
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};
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static void
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handle_request(struct fw_card *card, struct fw_request *r,
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int tcode, int destination, int source,
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int generation, int speed,
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unsigned long long offset,
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void *payload, size_t length, void *callback_data)
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{
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struct address_handler *handler = callback_data;
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struct request *request;
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struct request_event *e;
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unsigned long flags;
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struct client *client = handler->client;
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request = kmalloc(sizeof *request, GFP_ATOMIC);
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e = kmalloc(sizeof *e, GFP_ATOMIC);
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if (request == NULL || e == NULL) {
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kfree(request);
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kfree(e);
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fw_send_response(card, r, RCODE_CONFLICT_ERROR);
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return;
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}
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request->request = r;
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request->data = payload;
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request->length = length;
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spin_lock_irqsave(&client->lock, flags);
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request->serial = client->request_serial++;
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list_add_tail(&request->link, &client->request_list);
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spin_unlock_irqrestore(&client->lock, flags);
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e->request.type = FW_CDEV_EVENT_REQUEST;
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e->request.tcode = tcode;
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e->request.offset = offset;
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e->request.length = length;
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e->request.serial = request->serial;
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e->request.closure = handler->closure;
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queue_event(client, &e->event,
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&e->request, sizeof e->request, payload, length);
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}
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static int ioctl_allocate(struct client *client, void __user *arg)
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{
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struct fw_cdev_allocate request;
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struct address_handler *handler;
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unsigned long flags;
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struct fw_address_region region;
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if (copy_from_user(&request, arg, sizeof request))
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return -EFAULT;
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handler = kmalloc(sizeof *handler, GFP_KERNEL);
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if (handler == NULL)
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return -ENOMEM;
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region.start = request.offset;
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region.end = request.offset + request.length;
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handler->handler.length = request.length;
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handler->handler.address_callback = handle_request;
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handler->handler.callback_data = handler;
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handler->closure = request.closure;
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handler->client = client;
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if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) {
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kfree(handler);
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return -EBUSY;
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}
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spin_lock_irqsave(&client->lock, flags);
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list_add_tail(&handler->link, &client->handler_list);
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spin_unlock_irqrestore(&client->lock, flags);
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return 0;
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}
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static int ioctl_send_response(struct client *client, void __user *arg)
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{
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struct fw_cdev_send_response request;
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struct request *r;
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unsigned long flags;
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if (copy_from_user(&request, arg, sizeof request))
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return -EFAULT;
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spin_lock_irqsave(&client->lock, flags);
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list_for_each_entry(r, &client->request_list, link) {
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if (r->serial == request.serial) {
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list_del(&r->link);
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break;
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}
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}
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spin_unlock_irqrestore(&client->lock, flags);
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if (&r->link == &client->request_list)
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return -EINVAL;
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if (request.length < r->length)
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r->length = request.length;
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if (copy_from_user(r->data, u64_to_uptr(request.data), r->length))
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return -EFAULT;
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fw_send_response(client->device->card, r->request, request.rcode);
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kfree(r);
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return 0;
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}
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static void
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iso_callback(struct fw_iso_context *context, int status, u32 cycle, void *data)
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{
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struct client *client = data;
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struct iso_interrupt *interrupt;
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interrupt = kzalloc(sizeof *interrupt, GFP_ATOMIC);
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if (interrupt == NULL)
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return;
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interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
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interrupt->interrupt.closure = 0;
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interrupt->interrupt.cycle = cycle;
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queue_event(client, &interrupt->event,
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&interrupt->interrupt, sizeof interrupt->interrupt, NULL, 0);
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}
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static int ioctl_create_iso_context(struct client *client, void __user *arg)
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{
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struct fw_cdev_create_iso_context request;
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if (copy_from_user(&request, arg, sizeof request))
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return -EFAULT;
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client->iso_context = fw_iso_context_create(client->device->card,
|
||||
FW_ISO_CONTEXT_TRANSMIT,
|
||||
request.buffer_size,
|
||||
iso_callback, client);
|
||||
if (IS_ERR(client->iso_context))
|
||||
return PTR_ERR(client->iso_context);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ioctl_queue_iso(struct client *client, void __user *arg)
|
||||
{
|
||||
struct fw_cdev_queue_iso request;
|
||||
struct fw_cdev_iso_packet __user *p, *end, *next;
|
||||
void *payload, *payload_end;
|
||||
unsigned long index;
|
||||
int count;
|
||||
struct {
|
||||
struct fw_iso_packet packet;
|
||||
u8 header[256];
|
||||
} u;
|
||||
|
||||
if (client->iso_context == NULL)
|
||||
return -EINVAL;
|
||||
if (copy_from_user(&request, arg, sizeof request))
|
||||
return -EFAULT;
|
||||
|
||||
/* If the user passes a non-NULL data pointer, has mmap()'ed
|
||||
* the iso buffer, and the pointer points inside the buffer,
|
||||
* we setup the payload pointers accordingly. Otherwise we
|
||||
* set them both to NULL, which will still let packets with
|
||||
* payload_length == 0 through. In other words, if no packets
|
||||
* use the indirect payload, the iso buffer need not be mapped
|
||||
* and the request.data pointer is ignored.*/
|
||||
|
||||
index = (unsigned long)request.data - client->vm_start;
|
||||
if (request.data != 0 && client->vm_start != 0 &&
|
||||
index <= client->iso_context->buffer_size) {
|
||||
payload = client->iso_context->buffer + index;
|
||||
payload_end = client->iso_context->buffer +
|
||||
client->iso_context->buffer_size;
|
||||
} else {
|
||||
payload = NULL;
|
||||
payload_end = NULL;
|
||||
}
|
||||
|
||||
if (!access_ok(VERIFY_READ, request.packets, request.size))
|
||||
return -EFAULT;
|
||||
|
||||
p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request.packets);
|
||||
end = (void __user *)p + request.size;
|
||||
count = 0;
|
||||
while (p < end) {
|
||||
if (__copy_from_user(&u.packet, p, sizeof *p))
|
||||
return -EFAULT;
|
||||
next = (struct fw_cdev_iso_packet __user *)
|
||||
&p->header[u.packet.header_length / 4];
|
||||
if (next > end)
|
||||
return -EINVAL;
|
||||
if (__copy_from_user
|
||||
(u.packet.header, p->header, u.packet.header_length))
|
||||
return -EFAULT;
|
||||
if (u.packet.skip &&
|
||||
u.packet.header_length + u.packet.payload_length > 0)
|
||||
return -EINVAL;
|
||||
if (payload + u.packet.payload_length > payload_end)
|
||||
return -EINVAL;
|
||||
|
||||
if (fw_iso_context_queue(client->iso_context,
|
||||
&u.packet, payload))
|
||||
break;
|
||||
|
||||
p = next;
|
||||
payload += u.packet.payload_length;
|
||||
count++;
|
||||
}
|
||||
|
||||
request.size -= uptr_to_u64(p) - request.packets;
|
||||
request.packets = uptr_to_u64(p);
|
||||
request.data =
|
||||
client->vm_start + (payload - client->iso_context->buffer);
|
||||
|
||||
if (copy_to_user(arg, &request, sizeof request))
|
||||
return -EFAULT;
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static int ioctl_send_iso(struct client *client, void __user *arg)
|
||||
{
|
||||
struct fw_cdev_send_iso request;
|
||||
|
||||
if (copy_from_user(&request, arg, sizeof request))
|
||||
return -EFAULT;
|
||||
|
||||
return fw_iso_context_send(client->iso_context, request.channel,
|
||||
request.speed, request.cycle);
|
||||
}
|
||||
|
||||
static int
|
||||
dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
|
||||
{
|
||||
switch (cmd) {
|
||||
case FW_CDEV_IOC_GET_CONFIG_ROM:
|
||||
return ioctl_config_rom(client, arg);
|
||||
case FW_CDEV_IOC_SEND_REQUEST:
|
||||
return ioctl_send_request(client, arg);
|
||||
case FW_CDEV_IOC_ALLOCATE:
|
||||
return ioctl_allocate(client, arg);
|
||||
case FW_CDEV_IOC_SEND_RESPONSE:
|
||||
return ioctl_send_response(client, arg);
|
||||
case FW_CDEV_IOC_CREATE_ISO_CONTEXT:
|
||||
return ioctl_create_iso_context(client, arg);
|
||||
case FW_CDEV_IOC_QUEUE_ISO:
|
||||
return ioctl_queue_iso(client, arg);
|
||||
case FW_CDEV_IOC_SEND_ISO:
|
||||
return ioctl_send_iso(client, arg);
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static long
|
||||
fw_device_op_ioctl(struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
|
||||
return dispatch_ioctl(client, cmd, (void __user *) arg);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
static long
|
||||
fw_device_op_compat_ioctl(struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
|
||||
return dispatch_ioctl(client, cmd, compat_ptr(arg));
|
||||
}
|
||||
#endif
|
||||
|
||||
static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
|
||||
if (client->iso_context->buffer == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
client->vm_start = vma->vm_start;
|
||||
|
||||
return remap_vmalloc_range(vma, client->iso_context->buffer, 0);
|
||||
}
|
||||
|
||||
static int fw_device_op_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
struct address_handler *h, *next;
|
||||
struct request *r, *next_r;
|
||||
|
||||
if (client->iso_context)
|
||||
fw_iso_context_destroy(client->iso_context);
|
||||
|
||||
list_for_each_entry_safe(h, next, &client->handler_list, link) {
|
||||
fw_core_remove_address_handler(&h->handler);
|
||||
kfree(h);
|
||||
}
|
||||
|
||||
list_for_each_entry_safe(r, next_r, &client->request_list, link) {
|
||||
fw_send_response(client->device->card, r->request,
|
||||
RCODE_CONFLICT_ERROR);
|
||||
kfree(r);
|
||||
}
|
||||
|
||||
/* TODO: wait for all transactions to finish so
|
||||
* complete_transaction doesn't try to queue up responses
|
||||
* after we free client. */
|
||||
while (!list_empty(&client->event_list))
|
||||
dequeue_event(client, NULL, 0);
|
||||
|
||||
fw_device_put(client->device);
|
||||
kfree(client);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
|
||||
poll_wait(file, &client->wait, pt);
|
||||
|
||||
if (!list_empty(&client->event_list))
|
||||
return POLLIN | POLLRDNORM;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct file_operations fw_device_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = fw_device_op_open,
|
||||
.read = fw_device_op_read,
|
||||
.unlocked_ioctl = fw_device_op_ioctl,
|
||||
.poll = fw_device_op_poll,
|
||||
.release = fw_device_op_release,
|
||||
.mmap = fw_device_op_mmap,
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
.compat_ioctl = fw_device_op_compat_ioctl
|
||||
#endif
|
||||
};
|
146
drivers/firewire/fw-device-cdev.h
Normal file
146
drivers/firewire/fw-device-cdev.h
Normal file
|
@ -0,0 +1,146 @@
|
|||
/* -*- c-basic-offset: 8 -*-
|
||||
*
|
||||
* fw-device-cdev.h -- Char device interface.
|
||||
*
|
||||
* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software Foundation,
|
||||
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#ifndef __fw_cdev_h
|
||||
#define __fw_cdev_h
|
||||
|
||||
#include <asm/ioctl.h>
|
||||
#include <asm/types.h>
|
||||
|
||||
#define TCODE_WRITE_QUADLET_REQUEST 0
|
||||
#define TCODE_WRITE_BLOCK_REQUEST 1
|
||||
#define TCODE_WRITE_RESPONSE 2
|
||||
#define TCODE_READ_QUADLET_REQUEST 4
|
||||
#define TCODE_READ_BLOCK_REQUEST 5
|
||||
#define TCODE_READ_QUADLET_RESPONSE 6
|
||||
#define TCODE_READ_BLOCK_RESPONSE 7
|
||||
#define TCODE_CYCLE_START 8
|
||||
#define TCODE_LOCK_REQUEST 9
|
||||
#define TCODE_STREAM_DATA 10
|
||||
#define TCODE_LOCK_RESPONSE 11
|
||||
|
||||
#define RCODE_COMPLETE 0x0
|
||||
#define RCODE_CONFLICT_ERROR 0x4
|
||||
#define RCODE_DATA_ERROR 0x5
|
||||
#define RCODE_TYPE_ERROR 0x6
|
||||
#define RCODE_ADDRESS_ERROR 0x7
|
||||
|
||||
#define SCODE_100 0x0
|
||||
#define SCODE_200 0x1
|
||||
#define SCODE_400 0x2
|
||||
#define SCODE_800 0x3
|
||||
#define SCODE_1600 0x4
|
||||
#define SCODE_3200 0x5
|
||||
|
||||
#define FW_CDEV_EVENT_RESPONSE 0x00
|
||||
#define FW_CDEV_EVENT_REQUEST 0x01
|
||||
#define FW_CDEV_EVENT_ISO_INTERRUPT 0x02
|
||||
|
||||
/* The 'closure' fields are for user space to use. Data passed in the
|
||||
* 'closure' field for a request will be returned in the corresponding
|
||||
* event. It's a 64-bit type so that it's a fixed size type big
|
||||
* enough to hold a pointer on all platforms. */
|
||||
|
||||
struct fw_cdev_event_response {
|
||||
__u32 type;
|
||||
__u32 rcode;
|
||||
__u64 closure;
|
||||
__u32 length;
|
||||
__u32 data[0];
|
||||
};
|
||||
|
||||
struct fw_cdev_event_request {
|
||||
__u32 type;
|
||||
__u32 tcode;
|
||||
__u64 offset;
|
||||
__u64 closure;
|
||||
__u32 serial;
|
||||
__u32 length;
|
||||
__u32 data[0];
|
||||
};
|
||||
|
||||
struct fw_cdev_event_iso_interrupt {
|
||||
__u32 type;
|
||||
__u32 cycle;
|
||||
__u64 closure;
|
||||
};
|
||||
|
||||
#define FW_CDEV_IOC_GET_CONFIG_ROM _IOR('#', 0x00, struct fw_cdev_get_config_rom)
|
||||
#define FW_CDEV_IOC_SEND_REQUEST _IO('#', 0x01)
|
||||
#define FW_CDEV_IOC_ALLOCATE _IO('#', 0x02)
|
||||
#define FW_CDEV_IOC_SEND_RESPONSE _IO('#', 0x03)
|
||||
#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IO('#', 0x04)
|
||||
#define FW_CDEV_IOC_QUEUE_ISO _IO('#', 0x05)
|
||||
#define FW_CDEV_IOC_SEND_ISO _IO('#', 0x06)
|
||||
|
||||
struct fw_cdev_get_config_rom {
|
||||
__u32 length;
|
||||
__u32 data[256];
|
||||
};
|
||||
|
||||
struct fw_cdev_send_request {
|
||||
__u32 tcode;
|
||||
__u32 length;
|
||||
__u64 offset;
|
||||
__u64 closure;
|
||||
__u64 data;
|
||||
};
|
||||
|
||||
struct fw_cdev_send_response {
|
||||
__u32 rcode;
|
||||
__u32 length;
|
||||
__u64 data;
|
||||
__u32 serial;
|
||||
};
|
||||
|
||||
struct fw_cdev_allocate {
|
||||
__u64 offset;
|
||||
__u64 closure;
|
||||
__u32 length;
|
||||
};
|
||||
|
||||
struct fw_cdev_create_iso_context {
|
||||
__u32 buffer_size;
|
||||
};
|
||||
|
||||
struct fw_cdev_iso_packet {
|
||||
__u16 payload_length; /* Length of indirect payload. */
|
||||
__u32 interrupt : 1; /* Generate interrupt on this packet */
|
||||
__u32 skip : 1; /* Set to not send packet at all. */
|
||||
__u32 tag : 2;
|
||||
__u32 sy : 4;
|
||||
__u32 header_length : 8; /* Length of immediate header. */
|
||||
__u32 header[0];
|
||||
};
|
||||
|
||||
struct fw_cdev_queue_iso {
|
||||
__u32 size;
|
||||
__u64 packets;
|
||||
__u64 data;
|
||||
};
|
||||
|
||||
struct fw_cdev_send_iso {
|
||||
__u32 channel;
|
||||
__u32 speed;
|
||||
__s32 cycle;
|
||||
};
|
||||
|
||||
#endif
|
613
drivers/firewire/fw-device.c
Normal file
613
drivers/firewire/fw-device.c
Normal file
|
@ -0,0 +1,613 @@
|
|||
/* -*- c-basic-offset: 8 -*-
|
||||
*
|
||||
* fw-device.c - Device probing and sysfs code.
|
||||
*
|
||||
* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software Foundation,
|
||||
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/delay.h>
|
||||
#include "fw-transaction.h"
|
||||
#include "fw-topology.h"
|
||||
#include "fw-device.h"
|
||||
|
||||
void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 * p)
|
||||
{
|
||||
ci->p = p + 1;
|
||||
ci->end = ci->p + (p[0] >> 16);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(fw_csr_iterator_init);
|
||||
|
||||
int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value)
|
||||
{
|
||||
*key = *ci->p >> 24;
|
||||
*value = *ci->p & 0xffffff;
|
||||
|
||||
return ci->p++ < ci->end;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(fw_csr_iterator_next);
|
||||
|
||||
static int is_fw_unit(struct device *dev);
|
||||
|
||||
static int match_unit_directory(u32 * directory, struct fw_device_id *id)
|
||||
{
|
||||
struct fw_csr_iterator ci;
|
||||
int key, value, match;
|
||||
|
||||
match = 0;
|
||||
fw_csr_iterator_init(&ci, directory);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
if (key == CSR_VENDOR && value == id->vendor)
|
||||
match |= FW_MATCH_VENDOR;
|
||||
if (key == CSR_MODEL && value == id->model)
|
||||
match |= FW_MATCH_MODEL;
|
||||
if (key == CSR_SPECIFIER_ID && value == id->specifier_id)
|
||||
match |= FW_MATCH_SPECIFIER_ID;
|
||||
if (key == CSR_VERSION && value == id->version)
|
||||
match |= FW_MATCH_VERSION;
|
||||
}
|
||||
|
||||
return (match & id->match_flags) == id->match_flags;
|
||||
}
|
||||
|
||||
static int fw_unit_match(struct device *dev, struct device_driver *drv)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
struct fw_driver *driver = fw_driver(drv);
|
||||
int i;
|
||||
|
||||
/* We only allow binding to fw_units. */
|
||||
if (!is_fw_unit(dev))
|
||||
return 0;
|
||||
|
||||
for (i = 0; driver->id_table[i].match_flags != 0; i++) {
|
||||
if (match_unit_directory(unit->directory, &driver->id_table[i]))
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size)
|
||||
{
|
||||
struct fw_device *device = fw_device(unit->device.parent);
|
||||
struct fw_csr_iterator ci;
|
||||
|
||||
int key, value;
|
||||
int vendor = 0;
|
||||
int model = 0;
|
||||
int specifier_id = 0;
|
||||
int version = 0;
|
||||
|
||||
fw_csr_iterator_init(&ci, &device->config_rom[5]);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
switch (key) {
|
||||
case CSR_VENDOR:
|
||||
vendor = value;
|
||||
break;
|
||||
case CSR_MODEL:
|
||||
model = value;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
fw_csr_iterator_init(&ci, unit->directory);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
switch (key) {
|
||||
case CSR_SPECIFIER_ID:
|
||||
specifier_id = value;
|
||||
break;
|
||||
case CSR_VERSION:
|
||||
version = value;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return snprintf(buffer, buffer_size,
|
||||
"ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
|
||||
vendor, model, specifier_id, version);
|
||||
}
|
||||
|
||||
static int
|
||||
fw_unit_uevent(struct device *dev, char **envp, int num_envp,
|
||||
char *buffer, int buffer_size)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
char modalias[64];
|
||||
int length = 0;
|
||||
int i = 0;
|
||||
|
||||
if (!is_fw_unit(dev))
|
||||
goto out;
|
||||
|
||||
get_modalias(unit, modalias, sizeof modalias);
|
||||
|
||||
if (add_uevent_var(envp, num_envp, &i,
|
||||
buffer, buffer_size, &length,
|
||||
"MODALIAS=%s", modalias))
|
||||
return -ENOMEM;
|
||||
|
||||
out:
|
||||
envp[i] = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct bus_type fw_bus_type = {
|
||||
.name = "fw",
|
||||
.match = fw_unit_match,
|
||||
.uevent = fw_unit_uevent
|
||||
};
|
||||
|
||||
EXPORT_SYMBOL(fw_bus_type);
|
||||
|
||||
extern struct fw_device *fw_device_get(struct fw_device *device)
|
||||
{
|
||||
get_device(&device->device);
|
||||
|
||||
return device;
|
||||
}
|
||||
|
||||
extern void fw_device_put(struct fw_device *device)
|
||||
{
|
||||
put_device(&device->device);
|
||||
}
|
||||
|
||||
static void fw_device_release(struct device *dev)
|
||||
{
|
||||
struct fw_device *device = fw_device(dev);
|
||||
unsigned long flags;
|
||||
|
||||
/* Take the card lock so we don't set this to NULL while a
|
||||
* FW_NODE_UPDATED callback is being handled. */
|
||||
spin_lock_irqsave(&device->card->lock, flags);
|
||||
device->node->data = NULL;
|
||||
spin_unlock_irqrestore(&device->card->lock, flags);
|
||||
|
||||
fw_node_put(device->node);
|
||||
fw_card_put(device->card);
|
||||
kfree(device->config_rom);
|
||||
kfree(device);
|
||||
}
|
||||
|
||||
int fw_device_enable_phys_dma(struct fw_device *device)
|
||||
{
|
||||
return device->card->driver->enable_phys_dma(device->card,
|
||||
device->node_id,
|
||||
device->generation);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(fw_device_enable_phys_dma);
|
||||
|
||||
static ssize_t
|
||||
show_modalias_attribute(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
int length;
|
||||
|
||||
length = get_modalias(unit, buf, PAGE_SIZE);
|
||||
strcpy(buf + length, "\n");
|
||||
|
||||
return length + 1;
|
||||
}
|
||||
|
||||
static struct device_attribute modalias_attribute = {
|
||||
.attr = {.name = "modalias",.mode = S_IRUGO},
|
||||
.show = show_modalias_attribute
|
||||
};
|
||||
|
||||
static ssize_t
|
||||
show_config_rom_attribute(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct fw_device *device = fw_device(dev);
|
||||
|
||||
memcpy(buf, device->config_rom, device->config_rom_length * 4);
|
||||
|
||||
return device->config_rom_length * 4;
|
||||
}
|
||||
|
||||
static struct device_attribute config_rom_attribute = {
|
||||
.attr = {.name = "config_rom",.mode = S_IRUGO},
|
||||
.show = show_config_rom_attribute,
|
||||
};
|
||||
|
||||
struct read_quadlet_callback_data {
|
||||
struct completion done;
|
||||
int rcode;
|
||||
u32 data;
|
||||
};
|
||||
|
||||
static void
|
||||
complete_transaction(struct fw_card *card, int rcode,
|
||||
void *payload, size_t length, void *data)
|
||||
{
|
||||
struct read_quadlet_callback_data *callback_data = data;
|
||||
|
||||
if (rcode == RCODE_COMPLETE)
|
||||
callback_data->data = be32_to_cpu(*(__be32 *)payload);
|
||||
callback_data->rcode = rcode;
|
||||
complete(&callback_data->done);
|
||||
}
|
||||
|
||||
static int read_rom(struct fw_device *device, int index, u32 * data)
|
||||
{
|
||||
struct read_quadlet_callback_data callback_data;
|
||||
struct fw_transaction t;
|
||||
u64 offset;
|
||||
|
||||
init_completion(&callback_data.done);
|
||||
|
||||
offset = 0xfffff0000400ULL + index * 4;
|
||||
fw_send_request(device->card, &t, TCODE_READ_QUADLET_REQUEST,
|
||||
device->node_id | LOCAL_BUS,
|
||||
device->generation, SCODE_100,
|
||||
offset, NULL, 4, complete_transaction, &callback_data);
|
||||
|
||||
wait_for_completion(&callback_data.done);
|
||||
|
||||
*data = callback_data.data;
|
||||
|
||||
return callback_data.rcode;
|
||||
}
|
||||
|
||||
static int read_bus_info_block(struct fw_device *device)
|
||||
{
|
||||
static u32 rom[256];
|
||||
u32 stack[16], sp, key;
|
||||
int i, end, length;
|
||||
|
||||
/* First read the bus info block. */
|
||||
for (i = 0; i < 5; i++) {
|
||||
if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
|
||||
return -1;
|
||||
/* As per IEEE1212 7.2, during power-up, devices can
|
||||
* reply with a 0 for the first quadlet of the config
|
||||
* rom to indicate that they are booting (for example,
|
||||
* if the firmware is on the disk of a external
|
||||
* harddisk). In that case we just fail, and the
|
||||
* retry mechanism will try again later. */
|
||||
if (i == 0 && rom[i] == 0)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Now parse the config rom. The config rom is a recursive
|
||||
* directory structure so we parse it using a stack of
|
||||
* references to the blocks that make up the structure. We
|
||||
* push a reference to the root directory on the stack to
|
||||
* start things off. */
|
||||
length = i;
|
||||
sp = 0;
|
||||
stack[sp++] = 0xc0000005;
|
||||
while (sp > 0) {
|
||||
/* Pop the next block reference of the stack. The
|
||||
* lower 24 bits is the offset into the config rom,
|
||||
* the upper 8 bits are the type of the reference the
|
||||
* block. */
|
||||
key = stack[--sp];
|
||||
i = key & 0xffffff;
|
||||
if (i >= ARRAY_SIZE(rom))
|
||||
/* The reference points outside the standard
|
||||
* config rom area, something's fishy. */
|
||||
return -1;
|
||||
|
||||
/* Read header quadlet for the block to get the length. */
|
||||
if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
|
||||
return -1;
|
||||
end = i + (rom[i] >> 16) + 1;
|
||||
i++;
|
||||
if (end > ARRAY_SIZE(rom))
|
||||
/* This block extends outside standard config
|
||||
* area (and the array we're reading it
|
||||
* into). That's broken, so ignore this
|
||||
* device. */
|
||||
return -1;
|
||||
|
||||
/* Now read in the block. If this is a directory
|
||||
* block, check the entries as we read them to see if
|
||||
* it references another block, and push it in that case. */
|
||||
while (i < end) {
|
||||
if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
|
||||
return -1;
|
||||
if ((key >> 30) == 3 && (rom[i] >> 30) > 1 &&
|
||||
sp < ARRAY_SIZE(stack))
|
||||
stack[sp++] = i + rom[i];
|
||||
i++;
|
||||
}
|
||||
if (length < i)
|
||||
length = i;
|
||||
}
|
||||
|
||||
device->config_rom = kmalloc(length * 4, GFP_KERNEL);
|
||||
if (device->config_rom == NULL)
|
||||
return -1;
|
||||
memcpy(device->config_rom, rom, length * 4);
|
||||
device->config_rom_length = length;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void fw_unit_release(struct device *dev)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
|
||||
kfree(unit);
|
||||
}
|
||||
|
||||
static int is_fw_unit(struct device *dev)
|
||||
{
|
||||
return dev->release == fw_unit_release;
|
||||
}
|
||||
|
||||
static void create_units(struct fw_device *device)
|
||||
{
|
||||
struct fw_csr_iterator ci;
|
||||
struct fw_unit *unit;
|
||||
int key, value, i;
|
||||
|
||||
i = 0;
|
||||
fw_csr_iterator_init(&ci, &device->config_rom[5]);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
if (key != (CSR_UNIT | CSR_DIRECTORY))
|
||||
continue;
|
||||
|
||||
/* Get the address of the unit directory and try to
|
||||
* match the drivers id_tables against it. */
|
||||
unit = kzalloc(sizeof *unit, GFP_KERNEL);
|
||||
if (unit == NULL) {
|
||||
fw_error("failed to allocate memory for unit\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
unit->directory = ci.p + value - 1;
|
||||
unit->device.bus = &fw_bus_type;
|
||||
unit->device.release = fw_unit_release;
|
||||
unit->device.parent = &device->device;
|
||||
snprintf(unit->device.bus_id, sizeof unit->device.bus_id,
|
||||
"%s.%d", device->device.bus_id, i++);
|
||||
|
||||
if (device_register(&unit->device) < 0) {
|
||||
kfree(unit);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (device_create_file(&unit->device, &modalias_attribute) < 0) {
|
||||
device_unregister(&unit->device);
|
||||
kfree(unit);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int shutdown_unit(struct device *device, void *data)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(device);
|
||||
|
||||
if (is_fw_unit(device)) {
|
||||
device_remove_file(&unit->device, &modalias_attribute);
|
||||
device_unregister(&unit->device);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void fw_device_shutdown(struct work_struct *work)
|
||||
{
|
||||
struct fw_device *device =
|
||||
container_of(work, struct fw_device, work.work);
|
||||
|
||||
device_remove_file(&device->device, &config_rom_attribute);
|
||||
cdev_del(&device->cdev);
|
||||
unregister_chrdev_region(device->device.devt, 1);
|
||||
device_for_each_child(&device->device, NULL, shutdown_unit);
|
||||
device_unregister(&device->device);
|
||||
}
|
||||
|
||||
/* These defines control the retry behavior for reading the config
|
||||
* rom. It shouldn't be necessary to tweak these; if the device
|
||||
* doesn't respond to a config rom read within 10 seconds, it's not
|
||||
* going to respond at all. As for the initial delay, a lot of
|
||||
* devices will be able to respond within half a second after bus
|
||||
* reset. On the other hand, it's not really worth being more
|
||||
* aggressive than that, since it scales pretty well; if 10 devices
|
||||
* are plugged in, they're all getting read within one second. */
|
||||
|
||||
#define MAX_RETRIES 5
|
||||
#define RETRY_DELAY (2 * HZ)
|
||||
#define INITIAL_DELAY (HZ / 2)
|
||||
|
||||
static void fw_device_init(struct work_struct *work)
|
||||
{
|
||||
static int serial;
|
||||
struct fw_device *device =
|
||||
container_of(work, struct fw_device, work.work);
|
||||
|
||||
/* All failure paths here set node->data to NULL, so that we
|
||||
* don't try to do device_for_each_child() on a kfree()'d
|
||||
* device. */
|
||||
|
||||
if (read_bus_info_block(device) < 0) {
|
||||
if (device->config_rom_retries < MAX_RETRIES) {
|
||||
device->config_rom_retries++;
|
||||
schedule_delayed_work(&device->work, RETRY_DELAY);
|
||||
} else {
|
||||
fw_notify("giving up on config rom for node id %d\n",
|
||||
device->node_id);
|
||||
fw_device_release(&device->device);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
device->device.bus = &fw_bus_type;
|
||||
device->device.release = fw_device_release;
|
||||
device->device.parent = device->card->device;
|
||||
snprintf(device->device.bus_id, sizeof device->device.bus_id,
|
||||
"fw%d", serial++);
|
||||
|
||||
if (alloc_chrdev_region(&device->device.devt, 0, 1, "fw")) {
|
||||
fw_error("Failed to register char device region.\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
cdev_init(&device->cdev, &fw_device_ops);
|
||||
device->cdev.owner = THIS_MODULE;
|
||||
kobject_set_name(&device->cdev.kobj, device->device.bus_id);
|
||||
if (cdev_add(&device->cdev, device->device.devt, 1)) {
|
||||
fw_error("Failed to register char device.\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (device_add(&device->device)) {
|
||||
fw_error("Failed to add device.\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (device_create_file(&device->device, &config_rom_attribute) < 0) {
|
||||
fw_error("Failed to create config rom file.\n");
|
||||
goto error_with_device;
|
||||
}
|
||||
|
||||
create_units(device);
|
||||
|
||||
/* Transition the device to running state. If it got pulled
|
||||
* out from under us while we did the intialization work, we
|
||||
* have to shut down the device again here. Normally, though,
|
||||
* fw_node_event will be responsible for shutting it down when
|
||||
* necessary. We have to use the atomic cmpxchg here to avoid
|
||||
* racing with the FW_NODE_DESTROYED case in
|
||||
* fw_node_event(). */
|
||||
if (cmpxchg(&device->state,
|
||||
FW_DEVICE_INITIALIZING,
|
||||
FW_DEVICE_RUNNING) == FW_DEVICE_SHUTDOWN)
|
||||
fw_device_shutdown(&device->work.work);
|
||||
else
|
||||
fw_notify("created new fw device %s (%d config rom retries)\n",
|
||||
device->device.bus_id, device->config_rom_retries);
|
||||
|
||||
/* Reschedule the IRM work if we just finished reading the
|
||||
* root node config rom. If this races with a bus reset we
|
||||
* just end up running the IRM work a couple of extra times -
|
||||
* pretty harmless. */
|
||||
if (device->node == device->card->root_node)
|
||||
schedule_delayed_work(&device->card->work, 0);
|
||||
|
||||
return;
|
||||
|
||||
error_with_device:
|
||||
device_del(&device->device);
|
||||
error:
|
||||
cdev_del(&device->cdev);
|
||||
unregister_chrdev_region(device->device.devt, 1);
|
||||
put_device(&device->device);
|
||||
}
|
||||
|
||||
static int update_unit(struct device *dev, void *data)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
struct fw_driver *driver = (struct fw_driver *)dev->driver;
|
||||
|
||||
if (is_fw_unit(dev) && driver != NULL && driver->update != NULL)
|
||||
driver->update(unit);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
|
||||
{
|
||||
struct fw_device *device;
|
||||
|
||||
/* Ignore events for the local node (i.e. the node that
|
||||
* corresponds to the ieee1394 controller in this linux box). */
|
||||
if (node == card->local_node)
|
||||
return;
|
||||
|
||||
switch (event) {
|
||||
case FW_NODE_CREATED:
|
||||
case FW_NODE_LINK_ON:
|
||||
if (!node->link_on)
|
||||
break;
|
||||
|
||||
device = kzalloc(sizeof(*device), GFP_ATOMIC);
|
||||
if (device == NULL)
|
||||
break;
|
||||
|
||||
/* Do minimal intialization of the device here, the
|
||||
* rest will happen in fw_device_init(). We need the
|
||||
* card and node so we can read the config rom and we
|
||||
* need to do device_initialize() now so
|
||||
* device_for_each_child() in FW_NODE_UPDATED is
|
||||
* doesn't freak out. */
|
||||
device_initialize(&device->device);
|
||||
device->state = FW_DEVICE_INITIALIZING;
|
||||
device->card = fw_card_get(card);
|
||||
device->node = fw_node_get(node);
|
||||
device->node_id = node->node_id;
|
||||
device->generation = card->generation;
|
||||
|
||||
/* Set the node data to point back to this device so
|
||||
* FW_NODE_UPDATED callbacks can update the node_id
|
||||
* and generation for the device. */
|
||||
node->data = device;
|
||||
|
||||
/* Many devices are slow to respond after bus resets,
|
||||
* especially if they are bus powered and go through
|
||||
* power-up after getting plugged in. We schedule the
|
||||
* first config rom scan half a second after bus reset. */
|
||||
INIT_DELAYED_WORK(&device->work, fw_device_init);
|
||||
schedule_delayed_work(&device->work, INITIAL_DELAY);
|
||||
break;
|
||||
|
||||
case FW_NODE_UPDATED:
|
||||
if (!node->link_on || node->data == NULL)
|
||||
break;
|
||||
|
||||
device = node->data;
|
||||
device->node_id = node->node_id;
|
||||
device->generation = card->generation;
|
||||
device_for_each_child(&device->device, NULL, update_unit);
|
||||
break;
|
||||
|
||||
case FW_NODE_DESTROYED:
|
||||
case FW_NODE_LINK_OFF:
|
||||
if (!node->data)
|
||||
break;
|
||||
|
||||
/* Destroy the device associated with the node. There
|
||||
* are two cases here: either the device is fully
|
||||
* initialized (FW_DEVICE_RUNNING) or we're in the
|
||||
* process of reading its config rom
|
||||
* (FW_DEVICE_INITIALIZING). If it is fully
|
||||
* initialized we can reuse device->work to schedule a
|
||||
* full fw_device_shutdown(). If not, there's work
|
||||
* scheduled to read it's config rom, and we just put
|
||||
* the device in shutdown state to have that code fail
|
||||
* to create the device. */
|
||||
device = node->data;
|
||||
if (xchg(&device->state,
|
||||
FW_DEVICE_SHUTDOWN) == FW_DEVICE_RUNNING) {
|
||||
INIT_DELAYED_WORK(&device->work, fw_device_shutdown);
|
||||
schedule_delayed_work(&device->work, 0);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
127
drivers/firewire/fw-device.h
Normal file
127
drivers/firewire/fw-device.h
Normal file
|
@ -0,0 +1,127 @@
|
|||
/* -*- c-basic-offset: 8 -*-
|
||||
*
|
||||
* fw-device.h - Device probing and sysfs code.
|
||||
*
|
||||
* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software Foundation,
|
||||
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#ifndef __fw_device_h
|
||||
#define __fw_device_h
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/cdev.h>
|
||||
|
||||
enum fw_device_state {
|
||||
FW_DEVICE_INITIALIZING,
|
||||
FW_DEVICE_RUNNING,
|
||||
FW_DEVICE_SHUTDOWN
|
||||
};
|
||||
|
||||
struct fw_device {
|
||||
int state;
|
||||
struct fw_node *node;
|
||||
int node_id;
|
||||
int generation;
|
||||
struct fw_card *card;
|
||||
struct device device;
|
||||
struct cdev cdev;
|
||||
__be32 *config_rom;
|
||||
size_t config_rom_length;
|
||||
int config_rom_retries;
|
||||
struct delayed_work work;
|
||||
};
|
||||
|
||||
static inline struct fw_device *
|
||||
fw_device(struct device *dev)
|
||||
{
|
||||
return container_of(dev, struct fw_device, device);
|
||||
}
|
||||
|
||||
struct fw_device *fw_device_get(struct fw_device *device);
|
||||
void fw_device_put(struct fw_device *device);
|
||||
int fw_device_enable_phys_dma(struct fw_device *device);
|
||||
|
||||
struct fw_unit {
|
||||
struct device device;
|
||||
u32 *directory;
|
||||
};
|
||||
|
||||
static inline struct fw_unit *
|
||||
fw_unit(struct device *dev)
|
||||
{
|
||||
return container_of(dev, struct fw_unit, device);
|
||||
}
|
||||
|
||||
#define CSR_OFFSET 0x40
|
||||
#define CSR_LEAF 0x80
|
||||
#define CSR_DIRECTORY 0xc0
|
||||
|
||||
#define CSR_DESCRIPTOR 0x01
|
||||
#define CSR_VENDOR 0x03
|
||||
#define CSR_HARDWARE_VERSION 0x04
|
||||
#define CSR_NODE_CAPABILITIES 0x0c
|
||||
#define CSR_UNIT 0x11
|
||||
#define CSR_SPECIFIER_ID 0x12
|
||||
#define CSR_VERSION 0x13
|
||||
#define CSR_DEPENDENT_INFO 0x14
|
||||
#define CSR_MODEL 0x17
|
||||
#define CSR_INSTANCE 0x18
|
||||
|
||||
#define SBP2_COMMAND_SET_SPECIFIER 0x38
|
||||
#define SBP2_COMMAND_SET 0x39
|
||||
#define SBP2_COMMAND_SET_REVISION 0x3b
|
||||
#define SBP2_FIRMWARE_REVISION 0x3c
|
||||
|
||||
struct fw_csr_iterator {
|
||||
u32 *p;
|
||||
u32 *end;
|
||||
};
|
||||
|
||||
void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
|
||||
int fw_csr_iterator_next(struct fw_csr_iterator *ci,
|
||||
int *key, int *value);
|
||||
|
||||
#define FW_MATCH_VENDOR 0x0001
|
||||
#define FW_MATCH_MODEL 0x0002
|
||||
#define FW_MATCH_SPECIFIER_ID 0x0004
|
||||
#define FW_MATCH_VERSION 0x0008
|
||||
|
||||
struct fw_device_id {
|
||||
u32 match_flags;
|
||||
u32 vendor;
|
||||
u32 model;
|
||||
u32 specifier_id;
|
||||
u32 version;
|
||||
void *driver_data;
|
||||
};
|
||||
|
||||
struct fw_driver {
|
||||
struct device_driver driver;
|
||||
/* Called when the parent device sits through a bus reset. */
|
||||
void (*update) (struct fw_unit *unit);
|
||||
struct fw_device_id *id_table;
|
||||
};
|
||||
|
||||
static inline struct fw_driver *
|
||||
fw_driver(struct device_driver *drv)
|
||||
{
|
||||
return container_of(drv, struct fw_driver, driver);
|
||||
}
|
||||
|
||||
extern struct file_operations fw_device_ops;
|
||||
|
||||
#endif
|
|
@ -26,6 +26,7 @@
|
|||
|
||||
#include "fw-transaction.h"
|
||||
#include "fw-topology.h"
|
||||
#include "fw-device.h"
|
||||
|
||||
static int
|
||||
setup_iso_buffer(struct fw_iso_context *ctx, size_t size,
|
||||
|
|
|
@ -434,13 +434,15 @@ fw_core_handle_bus_reset(struct fw_card *card,
|
|||
for_each_fw_node(card, local_node, report_found_node);
|
||||
} else {
|
||||
update_tree(card, local_node, &changed);
|
||||
if (changed)
|
||||
card->irm_retries = 0;
|
||||
}
|
||||
|
||||
/* If we're not the root node, we may have to do some IRM work. */
|
||||
if (card->local_node != card->root_node)
|
||||
schedule_delayed_work(&card->work, 0);
|
||||
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(fw_core_handle_bus_reset);
|
||||
|
||||
void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
|
||||
{
|
||||
}
|
||||
|
|
|
@ -33,6 +33,7 @@
|
|||
|
||||
#include "fw-transaction.h"
|
||||
#include "fw-topology.h"
|
||||
#include "fw-device.h"
|
||||
|
||||
#define header_pri(pri) ((pri) << 0)
|
||||
#define header_tcode(tcode) ((tcode) << 4)
|
||||
|
@ -702,10 +703,6 @@ static struct fw_descriptor vendor_textual_descriptor = {
|
|||
.data = vendor_textual_descriptor_data
|
||||
};
|
||||
|
||||
struct bus_type fw_bus_type = {
|
||||
.name = "fw",
|
||||
};
|
||||
|
||||
static int __init fw_core_init(void)
|
||||
{
|
||||
int retval;
|
||||
|
|
|
@ -265,6 +265,10 @@ struct fw_card {
|
|||
struct device card_device;
|
||||
|
||||
struct list_head link;
|
||||
|
||||
/* Work struct for IRM duties. */
|
||||
struct delayed_work work;
|
||||
int irm_retries;
|
||||
};
|
||||
|
||||
struct fw_card *fw_card_get(struct fw_card *card);
|
||||
|
|
Loading…
Reference in a new issue