1530 lines
34 KiB
C
1530 lines
34 KiB
C
/*
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* VME Bridge Framework
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*
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* Author: Martyn Welch <martyn.welch@ge.com>
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* Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
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*
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* Based on work by Tom Armistead and Ajit Prem
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* Copyright 2004 Motorola Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/mm.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/pci.h>
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#include <linux/poll.h>
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#include <linux/highmem.h>
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#include <linux/interrupt.h>
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#include <linux/pagemap.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/syscalls.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/vme.h>
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#include "vme_bridge.h"
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/* Bitmask and list of registered buses both protected by common mutex */
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static unsigned int vme_bus_numbers;
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static LIST_HEAD(vme_bus_list);
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static DEFINE_MUTEX(vme_buses_lock);
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static void __exit vme_exit(void);
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static int __init vme_init(void);
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static struct vme_dev *dev_to_vme_dev(struct device *dev)
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{
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return container_of(dev, struct vme_dev, dev);
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}
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/*
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* Find the bridge that the resource is associated with.
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*/
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static struct vme_bridge *find_bridge(struct vme_resource *resource)
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{
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/* Get list to search */
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switch (resource->type) {
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case VME_MASTER:
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return list_entry(resource->entry, struct vme_master_resource,
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list)->parent;
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break;
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case VME_SLAVE:
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return list_entry(resource->entry, struct vme_slave_resource,
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list)->parent;
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break;
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case VME_DMA:
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return list_entry(resource->entry, struct vme_dma_resource,
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list)->parent;
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break;
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case VME_LM:
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return list_entry(resource->entry, struct vme_lm_resource,
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list)->parent;
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break;
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default:
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printk(KERN_ERR "Unknown resource type\n");
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return NULL;
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break;
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}
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}
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/*
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* Allocate a contiguous block of memory for use by the driver. This is used to
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* create the buffers for the slave windows.
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*/
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void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
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dma_addr_t *dma)
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{
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struct vme_bridge *bridge;
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if (resource == NULL) {
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printk(KERN_ERR "No resource\n");
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return NULL;
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}
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bridge = find_bridge(resource);
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find bridge\n");
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return NULL;
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}
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if (bridge->parent == NULL) {
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printk(KERN_ERR "Dev entry NULL for bridge %s\n", bridge->name);
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return NULL;
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}
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if (bridge->alloc_consistent == NULL) {
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printk(KERN_ERR "alloc_consistent not supported by bridge %s\n",
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bridge->name);
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return NULL;
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}
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return bridge->alloc_consistent(bridge->parent, size, dma);
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}
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EXPORT_SYMBOL(vme_alloc_consistent);
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/*
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* Free previously allocated contiguous block of memory.
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*/
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void vme_free_consistent(struct vme_resource *resource, size_t size,
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void *vaddr, dma_addr_t dma)
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{
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struct vme_bridge *bridge;
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if (resource == NULL) {
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printk(KERN_ERR "No resource\n");
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return;
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}
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bridge = find_bridge(resource);
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find bridge\n");
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return;
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}
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if (bridge->parent == NULL) {
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printk(KERN_ERR "Dev entry NULL for bridge %s\n", bridge->name);
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return;
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}
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if (bridge->free_consistent == NULL) {
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printk(KERN_ERR "free_consistent not supported by bridge %s\n",
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bridge->name);
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return;
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}
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bridge->free_consistent(bridge->parent, size, vaddr, dma);
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}
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EXPORT_SYMBOL(vme_free_consistent);
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size_t vme_get_size(struct vme_resource *resource)
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{
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int enabled, retval;
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unsigned long long base, size;
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dma_addr_t buf_base;
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u32 aspace, cycle, dwidth;
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switch (resource->type) {
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case VME_MASTER:
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retval = vme_master_get(resource, &enabled, &base, &size,
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&aspace, &cycle, &dwidth);
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return size;
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break;
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case VME_SLAVE:
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retval = vme_slave_get(resource, &enabled, &base, &size,
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&buf_base, &aspace, &cycle);
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return size;
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break;
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case VME_DMA:
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return 0;
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break;
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default:
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printk(KERN_ERR "Unknown resource type\n");
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return 0;
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break;
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}
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}
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EXPORT_SYMBOL(vme_get_size);
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static int vme_check_window(u32 aspace, unsigned long long vme_base,
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unsigned long long size)
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{
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int retval = 0;
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switch (aspace) {
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case VME_A16:
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if (((vme_base + size) > VME_A16_MAX) ||
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(vme_base > VME_A16_MAX))
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retval = -EFAULT;
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break;
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case VME_A24:
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if (((vme_base + size) > VME_A24_MAX) ||
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(vme_base > VME_A24_MAX))
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retval = -EFAULT;
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break;
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case VME_A32:
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if (((vme_base + size) > VME_A32_MAX) ||
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(vme_base > VME_A32_MAX))
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retval = -EFAULT;
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break;
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case VME_A64:
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/*
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* Any value held in an unsigned long long can be used as the
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* base
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*/
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break;
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case VME_CRCSR:
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if (((vme_base + size) > VME_CRCSR_MAX) ||
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(vme_base > VME_CRCSR_MAX))
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retval = -EFAULT;
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break;
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case VME_USER1:
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case VME_USER2:
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case VME_USER3:
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case VME_USER4:
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/* User Defined */
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break;
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default:
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printk(KERN_ERR "Invalid address space\n");
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retval = -EINVAL;
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break;
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}
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return retval;
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}
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/*
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* Request a slave image with specific attributes, return some unique
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* identifier.
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*/
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struct vme_resource *vme_slave_request(struct vme_dev *vdev, u32 address,
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u32 cycle)
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{
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struct vme_bridge *bridge;
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struct list_head *slave_pos = NULL;
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struct vme_slave_resource *allocated_image = NULL;
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struct vme_slave_resource *slave_image = NULL;
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struct vme_resource *resource = NULL;
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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goto err_bus;
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}
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/* Loop through slave resources */
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list_for_each(slave_pos, &bridge->slave_resources) {
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slave_image = list_entry(slave_pos,
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struct vme_slave_resource, list);
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if (slave_image == NULL) {
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printk(KERN_ERR "Registered NULL Slave resource\n");
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continue;
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}
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/* Find an unlocked and compatible image */
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mutex_lock(&slave_image->mtx);
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if (((slave_image->address_attr & address) == address) &&
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((slave_image->cycle_attr & cycle) == cycle) &&
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(slave_image->locked == 0)) {
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slave_image->locked = 1;
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mutex_unlock(&slave_image->mtx);
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allocated_image = slave_image;
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break;
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}
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mutex_unlock(&slave_image->mtx);
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}
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/* No free image */
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if (allocated_image == NULL)
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goto err_image;
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resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
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if (resource == NULL) {
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printk(KERN_WARNING "Unable to allocate resource structure\n");
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goto err_alloc;
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}
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resource->type = VME_SLAVE;
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resource->entry = &allocated_image->list;
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return resource;
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err_alloc:
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/* Unlock image */
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mutex_lock(&slave_image->mtx);
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slave_image->locked = 0;
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mutex_unlock(&slave_image->mtx);
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err_image:
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err_bus:
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return NULL;
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}
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EXPORT_SYMBOL(vme_slave_request);
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int vme_slave_set(struct vme_resource *resource, int enabled,
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unsigned long long vme_base, unsigned long long size,
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dma_addr_t buf_base, u32 aspace, u32 cycle)
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{
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struct vme_bridge *bridge = find_bridge(resource);
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struct vme_slave_resource *image;
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int retval;
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if (resource->type != VME_SLAVE) {
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printk(KERN_ERR "Not a slave resource\n");
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return -EINVAL;
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}
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image = list_entry(resource->entry, struct vme_slave_resource, list);
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if (bridge->slave_set == NULL) {
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printk(KERN_ERR "Function not supported\n");
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return -ENOSYS;
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}
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if (!(((image->address_attr & aspace) == aspace) &&
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((image->cycle_attr & cycle) == cycle))) {
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printk(KERN_ERR "Invalid attributes\n");
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return -EINVAL;
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}
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retval = vme_check_window(aspace, vme_base, size);
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if (retval)
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return retval;
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return bridge->slave_set(image, enabled, vme_base, size, buf_base,
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aspace, cycle);
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}
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EXPORT_SYMBOL(vme_slave_set);
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int vme_slave_get(struct vme_resource *resource, int *enabled,
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unsigned long long *vme_base, unsigned long long *size,
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dma_addr_t *buf_base, u32 *aspace, u32 *cycle)
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{
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struct vme_bridge *bridge = find_bridge(resource);
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struct vme_slave_resource *image;
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if (resource->type != VME_SLAVE) {
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printk(KERN_ERR "Not a slave resource\n");
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return -EINVAL;
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}
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image = list_entry(resource->entry, struct vme_slave_resource, list);
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if (bridge->slave_get == NULL) {
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printk(KERN_ERR "vme_slave_get not supported\n");
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return -EINVAL;
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}
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return bridge->slave_get(image, enabled, vme_base, size, buf_base,
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aspace, cycle);
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}
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EXPORT_SYMBOL(vme_slave_get);
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void vme_slave_free(struct vme_resource *resource)
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{
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struct vme_slave_resource *slave_image;
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if (resource->type != VME_SLAVE) {
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printk(KERN_ERR "Not a slave resource\n");
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return;
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}
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slave_image = list_entry(resource->entry, struct vme_slave_resource,
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list);
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if (slave_image == NULL) {
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printk(KERN_ERR "Can't find slave resource\n");
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return;
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}
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/* Unlock image */
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mutex_lock(&slave_image->mtx);
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if (slave_image->locked == 0)
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printk(KERN_ERR "Image is already free\n");
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slave_image->locked = 0;
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mutex_unlock(&slave_image->mtx);
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/* Free up resource memory */
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kfree(resource);
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}
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EXPORT_SYMBOL(vme_slave_free);
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/*
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* Request a master image with specific attributes, return some unique
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* identifier.
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*/
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struct vme_resource *vme_master_request(struct vme_dev *vdev, u32 address,
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u32 cycle, u32 dwidth)
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{
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struct vme_bridge *bridge;
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struct list_head *master_pos = NULL;
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struct vme_master_resource *allocated_image = NULL;
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struct vme_master_resource *master_image = NULL;
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struct vme_resource *resource = NULL;
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bridge = vdev->bridge;
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if (bridge == NULL) {
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printk(KERN_ERR "Can't find VME bus\n");
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goto err_bus;
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}
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/* Loop through master resources */
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list_for_each(master_pos, &bridge->master_resources) {
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master_image = list_entry(master_pos,
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struct vme_master_resource, list);
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if (master_image == NULL) {
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printk(KERN_WARNING "Registered NULL master resource\n");
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continue;
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}
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/* Find an unlocked and compatible image */
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spin_lock(&master_image->lock);
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if (((master_image->address_attr & address) == address) &&
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((master_image->cycle_attr & cycle) == cycle) &&
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((master_image->width_attr & dwidth) == dwidth) &&
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(master_image->locked == 0)) {
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master_image->locked = 1;
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spin_unlock(&master_image->lock);
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allocated_image = master_image;
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break;
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}
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spin_unlock(&master_image->lock);
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}
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/* Check to see if we found a resource */
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if (allocated_image == NULL) {
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printk(KERN_ERR "Can't find a suitable resource\n");
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goto err_image;
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}
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resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
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if (resource == NULL) {
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printk(KERN_ERR "Unable to allocate resource structure\n");
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goto err_alloc;
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}
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resource->type = VME_MASTER;
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resource->entry = &allocated_image->list;
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return resource;
|
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|
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err_alloc:
|
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/* Unlock image */
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spin_lock(&master_image->lock);
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master_image->locked = 0;
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spin_unlock(&master_image->lock);
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err_image:
|
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err_bus:
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return NULL;
|
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}
|
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EXPORT_SYMBOL(vme_master_request);
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|
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int vme_master_set(struct vme_resource *resource, int enabled,
|
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unsigned long long vme_base, unsigned long long size, u32 aspace,
|
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u32 cycle, u32 dwidth)
|
|
{
|
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struct vme_bridge *bridge = find_bridge(resource);
|
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struct vme_master_resource *image;
|
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int retval;
|
|
|
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if (resource->type != VME_MASTER) {
|
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printk(KERN_ERR "Not a master resource\n");
|
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return -EINVAL;
|
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}
|
|
|
|
image = list_entry(resource->entry, struct vme_master_resource, list);
|
|
|
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if (bridge->master_set == NULL) {
|
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printk(KERN_WARNING "vme_master_set not supported\n");
|
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return -EINVAL;
|
|
}
|
|
|
|
if (!(((image->address_attr & aspace) == aspace) &&
|
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((image->cycle_attr & cycle) == cycle) &&
|
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((image->width_attr & dwidth) == dwidth))) {
|
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printk(KERN_WARNING "Invalid attributes\n");
|
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return -EINVAL;
|
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}
|
|
|
|
retval = vme_check_window(aspace, vme_base, size);
|
|
if (retval)
|
|
return retval;
|
|
|
|
return bridge->master_set(image, enabled, vme_base, size, aspace,
|
|
cycle, dwidth);
|
|
}
|
|
EXPORT_SYMBOL(vme_master_set);
|
|
|
|
int vme_master_get(struct vme_resource *resource, int *enabled,
|
|
unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
|
|
u32 *cycle, u32 *dwidth)
|
|
{
|
|
struct vme_bridge *bridge = find_bridge(resource);
|
|
struct vme_master_resource *image;
|
|
|
|
if (resource->type != VME_MASTER) {
|
|
printk(KERN_ERR "Not a master resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
image = list_entry(resource->entry, struct vme_master_resource, list);
|
|
|
|
if (bridge->master_get == NULL) {
|
|
printk(KERN_WARNING "vme_master_set not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return bridge->master_get(image, enabled, vme_base, size, aspace,
|
|
cycle, dwidth);
|
|
}
|
|
EXPORT_SYMBOL(vme_master_get);
|
|
|
|
/*
|
|
* Read data out of VME space into a buffer.
|
|
*/
|
|
ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count,
|
|
loff_t offset)
|
|
{
|
|
struct vme_bridge *bridge = find_bridge(resource);
|
|
struct vme_master_resource *image;
|
|
size_t length;
|
|
|
|
if (bridge->master_read == NULL) {
|
|
printk(KERN_WARNING "Reading from resource not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (resource->type != VME_MASTER) {
|
|
printk(KERN_ERR "Not a master resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
image = list_entry(resource->entry, struct vme_master_resource, list);
|
|
|
|
length = vme_get_size(resource);
|
|
|
|
if (offset > length) {
|
|
printk(KERN_WARNING "Invalid Offset\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
if ((offset + count) > length)
|
|
count = length - offset;
|
|
|
|
return bridge->master_read(image, buf, count, offset);
|
|
|
|
}
|
|
EXPORT_SYMBOL(vme_master_read);
|
|
|
|
/*
|
|
* Write data out to VME space from a buffer.
|
|
*/
|
|
ssize_t vme_master_write(struct vme_resource *resource, void *buf,
|
|
size_t count, loff_t offset)
|
|
{
|
|
struct vme_bridge *bridge = find_bridge(resource);
|
|
struct vme_master_resource *image;
|
|
size_t length;
|
|
|
|
if (bridge->master_write == NULL) {
|
|
printk(KERN_WARNING "Writing to resource not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (resource->type != VME_MASTER) {
|
|
printk(KERN_ERR "Not a master resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
image = list_entry(resource->entry, struct vme_master_resource, list);
|
|
|
|
length = vme_get_size(resource);
|
|
|
|
if (offset > length) {
|
|
printk(KERN_WARNING "Invalid Offset\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
if ((offset + count) > length)
|
|
count = length - offset;
|
|
|
|
return bridge->master_write(image, buf, count, offset);
|
|
}
|
|
EXPORT_SYMBOL(vme_master_write);
|
|
|
|
/*
|
|
* Perform RMW cycle to provided location.
|
|
*/
|
|
unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask,
|
|
unsigned int compare, unsigned int swap, loff_t offset)
|
|
{
|
|
struct vme_bridge *bridge = find_bridge(resource);
|
|
struct vme_master_resource *image;
|
|
|
|
if (bridge->master_rmw == NULL) {
|
|
printk(KERN_WARNING "Writing to resource not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (resource->type != VME_MASTER) {
|
|
printk(KERN_ERR "Not a master resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
image = list_entry(resource->entry, struct vme_master_resource, list);
|
|
|
|
return bridge->master_rmw(image, mask, compare, swap, offset);
|
|
}
|
|
EXPORT_SYMBOL(vme_master_rmw);
|
|
|
|
void vme_master_free(struct vme_resource *resource)
|
|
{
|
|
struct vme_master_resource *master_image;
|
|
|
|
if (resource->type != VME_MASTER) {
|
|
printk(KERN_ERR "Not a master resource\n");
|
|
return;
|
|
}
|
|
|
|
master_image = list_entry(resource->entry, struct vme_master_resource,
|
|
list);
|
|
if (master_image == NULL) {
|
|
printk(KERN_ERR "Can't find master resource\n");
|
|
return;
|
|
}
|
|
|
|
/* Unlock image */
|
|
spin_lock(&master_image->lock);
|
|
if (master_image->locked == 0)
|
|
printk(KERN_ERR "Image is already free\n");
|
|
|
|
master_image->locked = 0;
|
|
spin_unlock(&master_image->lock);
|
|
|
|
/* Free up resource memory */
|
|
kfree(resource);
|
|
}
|
|
EXPORT_SYMBOL(vme_master_free);
|
|
|
|
/*
|
|
* Request a DMA controller with specific attributes, return some unique
|
|
* identifier.
|
|
*/
|
|
struct vme_resource *vme_dma_request(struct vme_dev *vdev, u32 route)
|
|
{
|
|
struct vme_bridge *bridge;
|
|
struct list_head *dma_pos = NULL;
|
|
struct vme_dma_resource *allocated_ctrlr = NULL;
|
|
struct vme_dma_resource *dma_ctrlr = NULL;
|
|
struct vme_resource *resource = NULL;
|
|
|
|
/* XXX Not checking resource attributes */
|
|
printk(KERN_ERR "No VME resource Attribute tests done\n");
|
|
|
|
bridge = vdev->bridge;
|
|
if (bridge == NULL) {
|
|
printk(KERN_ERR "Can't find VME bus\n");
|
|
goto err_bus;
|
|
}
|
|
|
|
/* Loop through DMA resources */
|
|
list_for_each(dma_pos, &bridge->dma_resources) {
|
|
dma_ctrlr = list_entry(dma_pos,
|
|
struct vme_dma_resource, list);
|
|
|
|
if (dma_ctrlr == NULL) {
|
|
printk(KERN_ERR "Registered NULL DMA resource\n");
|
|
continue;
|
|
}
|
|
|
|
/* Find an unlocked and compatible controller */
|
|
mutex_lock(&dma_ctrlr->mtx);
|
|
if (((dma_ctrlr->route_attr & route) == route) &&
|
|
(dma_ctrlr->locked == 0)) {
|
|
|
|
dma_ctrlr->locked = 1;
|
|
mutex_unlock(&dma_ctrlr->mtx);
|
|
allocated_ctrlr = dma_ctrlr;
|
|
break;
|
|
}
|
|
mutex_unlock(&dma_ctrlr->mtx);
|
|
}
|
|
|
|
/* Check to see if we found a resource */
|
|
if (allocated_ctrlr == NULL)
|
|
goto err_ctrlr;
|
|
|
|
resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
|
|
if (resource == NULL) {
|
|
printk(KERN_WARNING "Unable to allocate resource structure\n");
|
|
goto err_alloc;
|
|
}
|
|
resource->type = VME_DMA;
|
|
resource->entry = &allocated_ctrlr->list;
|
|
|
|
return resource;
|
|
|
|
err_alloc:
|
|
/* Unlock image */
|
|
mutex_lock(&dma_ctrlr->mtx);
|
|
dma_ctrlr->locked = 0;
|
|
mutex_unlock(&dma_ctrlr->mtx);
|
|
err_ctrlr:
|
|
err_bus:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_request);
|
|
|
|
/*
|
|
* Start new list
|
|
*/
|
|
struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
|
|
{
|
|
struct vme_dma_resource *ctrlr;
|
|
struct vme_dma_list *dma_list;
|
|
|
|
if (resource->type != VME_DMA) {
|
|
printk(KERN_ERR "Not a DMA resource\n");
|
|
return NULL;
|
|
}
|
|
|
|
ctrlr = list_entry(resource->entry, struct vme_dma_resource, list);
|
|
|
|
dma_list = kmalloc(sizeof(struct vme_dma_list), GFP_KERNEL);
|
|
if (dma_list == NULL) {
|
|
printk(KERN_ERR "Unable to allocate memory for new dma list\n");
|
|
return NULL;
|
|
}
|
|
INIT_LIST_HEAD(&dma_list->entries);
|
|
dma_list->parent = ctrlr;
|
|
mutex_init(&dma_list->mtx);
|
|
|
|
return dma_list;
|
|
}
|
|
EXPORT_SYMBOL(vme_new_dma_list);
|
|
|
|
/*
|
|
* Create "Pattern" type attributes
|
|
*/
|
|
struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern, u32 type)
|
|
{
|
|
struct vme_dma_attr *attributes;
|
|
struct vme_dma_pattern *pattern_attr;
|
|
|
|
attributes = kmalloc(sizeof(struct vme_dma_attr), GFP_KERNEL);
|
|
if (attributes == NULL) {
|
|
printk(KERN_ERR "Unable to allocate memory for attributes structure\n");
|
|
goto err_attr;
|
|
}
|
|
|
|
pattern_attr = kmalloc(sizeof(struct vme_dma_pattern), GFP_KERNEL);
|
|
if (pattern_attr == NULL) {
|
|
printk(KERN_ERR "Unable to allocate memory for pattern attributes\n");
|
|
goto err_pat;
|
|
}
|
|
|
|
attributes->type = VME_DMA_PATTERN;
|
|
attributes->private = (void *)pattern_attr;
|
|
|
|
pattern_attr->pattern = pattern;
|
|
pattern_attr->type = type;
|
|
|
|
return attributes;
|
|
|
|
err_pat:
|
|
kfree(attributes);
|
|
err_attr:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_pattern_attribute);
|
|
|
|
/*
|
|
* Create "PCI" type attributes
|
|
*/
|
|
struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t address)
|
|
{
|
|
struct vme_dma_attr *attributes;
|
|
struct vme_dma_pci *pci_attr;
|
|
|
|
/* XXX Run some sanity checks here */
|
|
|
|
attributes = kmalloc(sizeof(struct vme_dma_attr), GFP_KERNEL);
|
|
if (attributes == NULL) {
|
|
printk(KERN_ERR "Unable to allocate memory for attributes structure\n");
|
|
goto err_attr;
|
|
}
|
|
|
|
pci_attr = kmalloc(sizeof(struct vme_dma_pci), GFP_KERNEL);
|
|
if (pci_attr == NULL) {
|
|
printk(KERN_ERR "Unable to allocate memory for pci attributes\n");
|
|
goto err_pci;
|
|
}
|
|
|
|
|
|
|
|
attributes->type = VME_DMA_PCI;
|
|
attributes->private = (void *)pci_attr;
|
|
|
|
pci_attr->address = address;
|
|
|
|
return attributes;
|
|
|
|
err_pci:
|
|
kfree(attributes);
|
|
err_attr:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_pci_attribute);
|
|
|
|
/*
|
|
* Create "VME" type attributes
|
|
*/
|
|
struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address,
|
|
u32 aspace, u32 cycle, u32 dwidth)
|
|
{
|
|
struct vme_dma_attr *attributes;
|
|
struct vme_dma_vme *vme_attr;
|
|
|
|
attributes = kmalloc(
|
|
sizeof(struct vme_dma_attr), GFP_KERNEL);
|
|
if (attributes == NULL) {
|
|
printk(KERN_ERR "Unable to allocate memory for attributes structure\n");
|
|
goto err_attr;
|
|
}
|
|
|
|
vme_attr = kmalloc(sizeof(struct vme_dma_vme), GFP_KERNEL);
|
|
if (vme_attr == NULL) {
|
|
printk(KERN_ERR "Unable to allocate memory for vme attributes\n");
|
|
goto err_vme;
|
|
}
|
|
|
|
attributes->type = VME_DMA_VME;
|
|
attributes->private = (void *)vme_attr;
|
|
|
|
vme_attr->address = address;
|
|
vme_attr->aspace = aspace;
|
|
vme_attr->cycle = cycle;
|
|
vme_attr->dwidth = dwidth;
|
|
|
|
return attributes;
|
|
|
|
err_vme:
|
|
kfree(attributes);
|
|
err_attr:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_vme_attribute);
|
|
|
|
/*
|
|
* Free attribute
|
|
*/
|
|
void vme_dma_free_attribute(struct vme_dma_attr *attributes)
|
|
{
|
|
kfree(attributes->private);
|
|
kfree(attributes);
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_free_attribute);
|
|
|
|
int vme_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src,
|
|
struct vme_dma_attr *dest, size_t count)
|
|
{
|
|
struct vme_bridge *bridge = list->parent->parent;
|
|
int retval;
|
|
|
|
if (bridge->dma_list_add == NULL) {
|
|
printk(KERN_WARNING "Link List DMA generation not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!mutex_trylock(&list->mtx)) {
|
|
printk(KERN_ERR "Link List already submitted\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
retval = bridge->dma_list_add(list, src, dest, count);
|
|
|
|
mutex_unlock(&list->mtx);
|
|
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_list_add);
|
|
|
|
int vme_dma_list_exec(struct vme_dma_list *list)
|
|
{
|
|
struct vme_bridge *bridge = list->parent->parent;
|
|
int retval;
|
|
|
|
if (bridge->dma_list_exec == NULL) {
|
|
printk(KERN_ERR "Link List DMA execution not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&list->mtx);
|
|
|
|
retval = bridge->dma_list_exec(list);
|
|
|
|
mutex_unlock(&list->mtx);
|
|
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_list_exec);
|
|
|
|
int vme_dma_list_free(struct vme_dma_list *list)
|
|
{
|
|
struct vme_bridge *bridge = list->parent->parent;
|
|
int retval;
|
|
|
|
if (bridge->dma_list_empty == NULL) {
|
|
printk(KERN_WARNING "Emptying of Link Lists not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!mutex_trylock(&list->mtx)) {
|
|
printk(KERN_ERR "Link List in use\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Empty out all of the entries from the dma list. We need to go to the
|
|
* low level driver as dma entries are driver specific.
|
|
*/
|
|
retval = bridge->dma_list_empty(list);
|
|
if (retval) {
|
|
printk(KERN_ERR "Unable to empty link-list entries\n");
|
|
mutex_unlock(&list->mtx);
|
|
return retval;
|
|
}
|
|
mutex_unlock(&list->mtx);
|
|
kfree(list);
|
|
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_list_free);
|
|
|
|
int vme_dma_free(struct vme_resource *resource)
|
|
{
|
|
struct vme_dma_resource *ctrlr;
|
|
|
|
if (resource->type != VME_DMA) {
|
|
printk(KERN_ERR "Not a DMA resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ctrlr = list_entry(resource->entry, struct vme_dma_resource, list);
|
|
|
|
if (!mutex_trylock(&ctrlr->mtx)) {
|
|
printk(KERN_ERR "Resource busy, can't free\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (!(list_empty(&ctrlr->pending) && list_empty(&ctrlr->running))) {
|
|
printk(KERN_WARNING "Resource still processing transfers\n");
|
|
mutex_unlock(&ctrlr->mtx);
|
|
return -EBUSY;
|
|
}
|
|
|
|
ctrlr->locked = 0;
|
|
|
|
mutex_unlock(&ctrlr->mtx);
|
|
|
|
kfree(resource);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vme_dma_free);
|
|
|
|
void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
|
|
{
|
|
void (*call)(int, int, void *);
|
|
void *priv_data;
|
|
|
|
call = bridge->irq[level - 1].callback[statid].func;
|
|
priv_data = bridge->irq[level - 1].callback[statid].priv_data;
|
|
|
|
if (call != NULL)
|
|
call(level, statid, priv_data);
|
|
else
|
|
printk(KERN_WARNING "Spurilous VME interrupt, level:%x, vector:%x\n",
|
|
level, statid);
|
|
}
|
|
EXPORT_SYMBOL(vme_irq_handler);
|
|
|
|
int vme_irq_request(struct vme_dev *vdev, int level, int statid,
|
|
void (*callback)(int, int, void *),
|
|
void *priv_data)
|
|
{
|
|
struct vme_bridge *bridge;
|
|
|
|
bridge = vdev->bridge;
|
|
if (bridge == NULL) {
|
|
printk(KERN_ERR "Can't find VME bus\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((level < 1) || (level > 7)) {
|
|
printk(KERN_ERR "Invalid interrupt level\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (bridge->irq_set == NULL) {
|
|
printk(KERN_ERR "Configuring interrupts not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&bridge->irq_mtx);
|
|
|
|
if (bridge->irq[level - 1].callback[statid].func) {
|
|
mutex_unlock(&bridge->irq_mtx);
|
|
printk(KERN_WARNING "VME Interrupt already taken\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
bridge->irq[level - 1].count++;
|
|
bridge->irq[level - 1].callback[statid].priv_data = priv_data;
|
|
bridge->irq[level - 1].callback[statid].func = callback;
|
|
|
|
/* Enable IRQ level */
|
|
bridge->irq_set(bridge, level, 1, 1);
|
|
|
|
mutex_unlock(&bridge->irq_mtx);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vme_irq_request);
|
|
|
|
void vme_irq_free(struct vme_dev *vdev, int level, int statid)
|
|
{
|
|
struct vme_bridge *bridge;
|
|
|
|
bridge = vdev->bridge;
|
|
if (bridge == NULL) {
|
|
printk(KERN_ERR "Can't find VME bus\n");
|
|
return;
|
|
}
|
|
|
|
if ((level < 1) || (level > 7)) {
|
|
printk(KERN_ERR "Invalid interrupt level\n");
|
|
return;
|
|
}
|
|
|
|
if (bridge->irq_set == NULL) {
|
|
printk(KERN_ERR "Configuring interrupts not supported\n");
|
|
return;
|
|
}
|
|
|
|
mutex_lock(&bridge->irq_mtx);
|
|
|
|
bridge->irq[level - 1].count--;
|
|
|
|
/* Disable IRQ level if no more interrupts attached at this level*/
|
|
if (bridge->irq[level - 1].count == 0)
|
|
bridge->irq_set(bridge, level, 0, 1);
|
|
|
|
bridge->irq[level - 1].callback[statid].func = NULL;
|
|
bridge->irq[level - 1].callback[statid].priv_data = NULL;
|
|
|
|
mutex_unlock(&bridge->irq_mtx);
|
|
}
|
|
EXPORT_SYMBOL(vme_irq_free);
|
|
|
|
int vme_irq_generate(struct vme_dev *vdev, int level, int statid)
|
|
{
|
|
struct vme_bridge *bridge;
|
|
|
|
bridge = vdev->bridge;
|
|
if (bridge == NULL) {
|
|
printk(KERN_ERR "Can't find VME bus\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((level < 1) || (level > 7)) {
|
|
printk(KERN_WARNING "Invalid interrupt level\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (bridge->irq_generate == NULL) {
|
|
printk(KERN_WARNING "Interrupt generation not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return bridge->irq_generate(bridge, level, statid);
|
|
}
|
|
EXPORT_SYMBOL(vme_irq_generate);
|
|
|
|
/*
|
|
* Request the location monitor, return resource or NULL
|
|
*/
|
|
struct vme_resource *vme_lm_request(struct vme_dev *vdev)
|
|
{
|
|
struct vme_bridge *bridge;
|
|
struct list_head *lm_pos = NULL;
|
|
struct vme_lm_resource *allocated_lm = NULL;
|
|
struct vme_lm_resource *lm = NULL;
|
|
struct vme_resource *resource = NULL;
|
|
|
|
bridge = vdev->bridge;
|
|
if (bridge == NULL) {
|
|
printk(KERN_ERR "Can't find VME bus\n");
|
|
goto err_bus;
|
|
}
|
|
|
|
/* Loop through DMA resources */
|
|
list_for_each(lm_pos, &bridge->lm_resources) {
|
|
lm = list_entry(lm_pos,
|
|
struct vme_lm_resource, list);
|
|
|
|
if (lm == NULL) {
|
|
printk(KERN_ERR "Registered NULL Location Monitor resource\n");
|
|
continue;
|
|
}
|
|
|
|
/* Find an unlocked controller */
|
|
mutex_lock(&lm->mtx);
|
|
if (lm->locked == 0) {
|
|
lm->locked = 1;
|
|
mutex_unlock(&lm->mtx);
|
|
allocated_lm = lm;
|
|
break;
|
|
}
|
|
mutex_unlock(&lm->mtx);
|
|
}
|
|
|
|
/* Check to see if we found a resource */
|
|
if (allocated_lm == NULL)
|
|
goto err_lm;
|
|
|
|
resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
|
|
if (resource == NULL) {
|
|
printk(KERN_ERR "Unable to allocate resource structure\n");
|
|
goto err_alloc;
|
|
}
|
|
resource->type = VME_LM;
|
|
resource->entry = &allocated_lm->list;
|
|
|
|
return resource;
|
|
|
|
err_alloc:
|
|
/* Unlock image */
|
|
mutex_lock(&lm->mtx);
|
|
lm->locked = 0;
|
|
mutex_unlock(&lm->mtx);
|
|
err_lm:
|
|
err_bus:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(vme_lm_request);
|
|
|
|
int vme_lm_count(struct vme_resource *resource)
|
|
{
|
|
struct vme_lm_resource *lm;
|
|
|
|
if (resource->type != VME_LM) {
|
|
printk(KERN_ERR "Not a Location Monitor resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
lm = list_entry(resource->entry, struct vme_lm_resource, list);
|
|
|
|
return lm->monitors;
|
|
}
|
|
EXPORT_SYMBOL(vme_lm_count);
|
|
|
|
int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base,
|
|
u32 aspace, u32 cycle)
|
|
{
|
|
struct vme_bridge *bridge = find_bridge(resource);
|
|
struct vme_lm_resource *lm;
|
|
|
|
if (resource->type != VME_LM) {
|
|
printk(KERN_ERR "Not a Location Monitor resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
lm = list_entry(resource->entry, struct vme_lm_resource, list);
|
|
|
|
if (bridge->lm_set == NULL) {
|
|
printk(KERN_ERR "vme_lm_set not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return bridge->lm_set(lm, lm_base, aspace, cycle);
|
|
}
|
|
EXPORT_SYMBOL(vme_lm_set);
|
|
|
|
int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base,
|
|
u32 *aspace, u32 *cycle)
|
|
{
|
|
struct vme_bridge *bridge = find_bridge(resource);
|
|
struct vme_lm_resource *lm;
|
|
|
|
if (resource->type != VME_LM) {
|
|
printk(KERN_ERR "Not a Location Monitor resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
lm = list_entry(resource->entry, struct vme_lm_resource, list);
|
|
|
|
if (bridge->lm_get == NULL) {
|
|
printk(KERN_ERR "vme_lm_get not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return bridge->lm_get(lm, lm_base, aspace, cycle);
|
|
}
|
|
EXPORT_SYMBOL(vme_lm_get);
|
|
|
|
int vme_lm_attach(struct vme_resource *resource, int monitor,
|
|
void (*callback)(int))
|
|
{
|
|
struct vme_bridge *bridge = find_bridge(resource);
|
|
struct vme_lm_resource *lm;
|
|
|
|
if (resource->type != VME_LM) {
|
|
printk(KERN_ERR "Not a Location Monitor resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
lm = list_entry(resource->entry, struct vme_lm_resource, list);
|
|
|
|
if (bridge->lm_attach == NULL) {
|
|
printk(KERN_ERR "vme_lm_attach not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return bridge->lm_attach(lm, monitor, callback);
|
|
}
|
|
EXPORT_SYMBOL(vme_lm_attach);
|
|
|
|
int vme_lm_detach(struct vme_resource *resource, int monitor)
|
|
{
|
|
struct vme_bridge *bridge = find_bridge(resource);
|
|
struct vme_lm_resource *lm;
|
|
|
|
if (resource->type != VME_LM) {
|
|
printk(KERN_ERR "Not a Location Monitor resource\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
lm = list_entry(resource->entry, struct vme_lm_resource, list);
|
|
|
|
if (bridge->lm_detach == NULL) {
|
|
printk(KERN_ERR "vme_lm_detach not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return bridge->lm_detach(lm, monitor);
|
|
}
|
|
EXPORT_SYMBOL(vme_lm_detach);
|
|
|
|
void vme_lm_free(struct vme_resource *resource)
|
|
{
|
|
struct vme_lm_resource *lm;
|
|
|
|
if (resource->type != VME_LM) {
|
|
printk(KERN_ERR "Not a Location Monitor resource\n");
|
|
return;
|
|
}
|
|
|
|
lm = list_entry(resource->entry, struct vme_lm_resource, list);
|
|
|
|
mutex_lock(&lm->mtx);
|
|
|
|
/* XXX
|
|
* Check to see that there aren't any callbacks still attached, if
|
|
* there are we should probably be detaching them!
|
|
*/
|
|
|
|
lm->locked = 0;
|
|
|
|
mutex_unlock(&lm->mtx);
|
|
|
|
kfree(resource);
|
|
}
|
|
EXPORT_SYMBOL(vme_lm_free);
|
|
|
|
int vme_slot_num(struct vme_dev *vdev)
|
|
{
|
|
struct vme_bridge *bridge;
|
|
|
|
bridge = vdev->bridge;
|
|
if (bridge == NULL) {
|
|
printk(KERN_ERR "Can't find VME bus\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (bridge->slot_get == NULL) {
|
|
printk(KERN_WARNING "vme_slot_num not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return bridge->slot_get(bridge);
|
|
}
|
|
EXPORT_SYMBOL(vme_slot_num);
|
|
|
|
int vme_bus_num(struct vme_dev *vdev)
|
|
{
|
|
struct vme_bridge *bridge;
|
|
|
|
bridge = vdev->bridge;
|
|
if (bridge == NULL) {
|
|
pr_err("Can't find VME bus\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return bridge->num;
|
|
}
|
|
EXPORT_SYMBOL(vme_bus_num);
|
|
|
|
/* - Bridge Registration --------------------------------------------------- */
|
|
|
|
static void vme_dev_release(struct device *dev)
|
|
{
|
|
kfree(dev_to_vme_dev(dev));
|
|
}
|
|
|
|
int vme_register_bridge(struct vme_bridge *bridge)
|
|
{
|
|
int i;
|
|
int ret = -1;
|
|
|
|
mutex_lock(&vme_buses_lock);
|
|
for (i = 0; i < sizeof(vme_bus_numbers) * 8; i++) {
|
|
if ((vme_bus_numbers & (1 << i)) == 0) {
|
|
vme_bus_numbers |= (1 << i);
|
|
bridge->num = i;
|
|
INIT_LIST_HEAD(&bridge->devices);
|
|
list_add_tail(&bridge->bus_list, &vme_bus_list);
|
|
ret = 0;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&vme_buses_lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(vme_register_bridge);
|
|
|
|
void vme_unregister_bridge(struct vme_bridge *bridge)
|
|
{
|
|
struct vme_dev *vdev;
|
|
struct vme_dev *tmp;
|
|
|
|
mutex_lock(&vme_buses_lock);
|
|
vme_bus_numbers &= ~(1 << bridge->num);
|
|
list_for_each_entry_safe(vdev, tmp, &bridge->devices, bridge_list) {
|
|
list_del(&vdev->drv_list);
|
|
list_del(&vdev->bridge_list);
|
|
device_unregister(&vdev->dev);
|
|
}
|
|
list_del(&bridge->bus_list);
|
|
mutex_unlock(&vme_buses_lock);
|
|
}
|
|
EXPORT_SYMBOL(vme_unregister_bridge);
|
|
|
|
/* - Driver Registration --------------------------------------------------- */
|
|
|
|
static int __vme_register_driver_bus(struct vme_driver *drv,
|
|
struct vme_bridge *bridge, unsigned int ndevs)
|
|
{
|
|
int err;
|
|
unsigned int i;
|
|
struct vme_dev *vdev;
|
|
struct vme_dev *tmp;
|
|
|
|
for (i = 0; i < ndevs; i++) {
|
|
vdev = kzalloc(sizeof(struct vme_dev), GFP_KERNEL);
|
|
if (!vdev) {
|
|
err = -ENOMEM;
|
|
goto err_devalloc;
|
|
}
|
|
vdev->num = i;
|
|
vdev->bridge = bridge;
|
|
vdev->dev.platform_data = drv;
|
|
vdev->dev.release = vme_dev_release;
|
|
vdev->dev.parent = bridge->parent;
|
|
vdev->dev.bus = &vme_bus_type;
|
|
dev_set_name(&vdev->dev, "%s.%u-%u", drv->name, bridge->num,
|
|
vdev->num);
|
|
|
|
err = device_register(&vdev->dev);
|
|
if (err)
|
|
goto err_reg;
|
|
|
|
if (vdev->dev.platform_data) {
|
|
list_add_tail(&vdev->drv_list, &drv->devices);
|
|
list_add_tail(&vdev->bridge_list, &bridge->devices);
|
|
} else
|
|
device_unregister(&vdev->dev);
|
|
}
|
|
return 0;
|
|
|
|
err_reg:
|
|
put_device(&vdev->dev);
|
|
kfree(vdev);
|
|
err_devalloc:
|
|
list_for_each_entry_safe(vdev, tmp, &drv->devices, drv_list) {
|
|
list_del(&vdev->drv_list);
|
|
list_del(&vdev->bridge_list);
|
|
device_unregister(&vdev->dev);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int __vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
|
|
{
|
|
struct vme_bridge *bridge;
|
|
int err = 0;
|
|
|
|
mutex_lock(&vme_buses_lock);
|
|
list_for_each_entry(bridge, &vme_bus_list, bus_list) {
|
|
/*
|
|
* This cannot cause trouble as we already have vme_buses_lock
|
|
* and if the bridge is removed, it will have to go through
|
|
* vme_unregister_bridge() to do it (which calls remove() on
|
|
* the bridge which in turn tries to acquire vme_buses_lock and
|
|
* will have to wait).
|
|
*/
|
|
err = __vme_register_driver_bus(drv, bridge, ndevs);
|
|
if (err)
|
|
break;
|
|
}
|
|
mutex_unlock(&vme_buses_lock);
|
|
return err;
|
|
}
|
|
|
|
int vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
|
|
{
|
|
int err;
|
|
|
|
drv->driver.name = drv->name;
|
|
drv->driver.bus = &vme_bus_type;
|
|
INIT_LIST_HEAD(&drv->devices);
|
|
|
|
err = driver_register(&drv->driver);
|
|
if (err)
|
|
return err;
|
|
|
|
err = __vme_register_driver(drv, ndevs);
|
|
if (err)
|
|
driver_unregister(&drv->driver);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(vme_register_driver);
|
|
|
|
void vme_unregister_driver(struct vme_driver *drv)
|
|
{
|
|
struct vme_dev *dev, *dev_tmp;
|
|
|
|
mutex_lock(&vme_buses_lock);
|
|
list_for_each_entry_safe(dev, dev_tmp, &drv->devices, drv_list) {
|
|
list_del(&dev->drv_list);
|
|
list_del(&dev->bridge_list);
|
|
device_unregister(&dev->dev);
|
|
}
|
|
mutex_unlock(&vme_buses_lock);
|
|
|
|
driver_unregister(&drv->driver);
|
|
}
|
|
EXPORT_SYMBOL(vme_unregister_driver);
|
|
|
|
/* - Bus Registration ------------------------------------------------------ */
|
|
|
|
static int vme_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct vme_driver *vme_drv;
|
|
|
|
vme_drv = container_of(drv, struct vme_driver, driver);
|
|
|
|
if (dev->platform_data == vme_drv) {
|
|
struct vme_dev *vdev = dev_to_vme_dev(dev);
|
|
|
|
if (vme_drv->match && vme_drv->match(vdev))
|
|
return 1;
|
|
|
|
dev->platform_data = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int vme_bus_probe(struct device *dev)
|
|
{
|
|
int retval = -ENODEV;
|
|
struct vme_driver *driver;
|
|
struct vme_dev *vdev = dev_to_vme_dev(dev);
|
|
|
|
driver = dev->platform_data;
|
|
|
|
if (driver->probe != NULL)
|
|
retval = driver->probe(vdev);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int vme_bus_remove(struct device *dev)
|
|
{
|
|
int retval = -ENODEV;
|
|
struct vme_driver *driver;
|
|
struct vme_dev *vdev = dev_to_vme_dev(dev);
|
|
|
|
driver = dev->platform_data;
|
|
|
|
if (driver->remove != NULL)
|
|
retval = driver->remove(vdev);
|
|
|
|
return retval;
|
|
}
|
|
|
|
struct bus_type vme_bus_type = {
|
|
.name = "vme",
|
|
.match = vme_bus_match,
|
|
.probe = vme_bus_probe,
|
|
.remove = vme_bus_remove,
|
|
};
|
|
EXPORT_SYMBOL(vme_bus_type);
|
|
|
|
static int __init vme_init(void)
|
|
{
|
|
return bus_register(&vme_bus_type);
|
|
}
|
|
|
|
static void __exit vme_exit(void)
|
|
{
|
|
bus_unregister(&vme_bus_type);
|
|
}
|
|
|
|
subsys_initcall(vme_init);
|
|
module_exit(vme_exit);
|