798 lines
20 KiB
C
798 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Bus & driver management routines for devices within
|
|
* a MacIO ASIC. Interface to new driver model mostly
|
|
* stolen from the PCI version.
|
|
*
|
|
* Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
|
|
*
|
|
* TODO:
|
|
*
|
|
* - Don't probe below media bay by default, but instead provide
|
|
* some hooks for media bay to dynamically add/remove it's own
|
|
* sub-devices.
|
|
*/
|
|
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/pci_ids.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_irq.h>
|
|
|
|
#include <asm/machdep.h>
|
|
#include <asm/macio.h>
|
|
#include <asm/pmac_feature.h>
|
|
|
|
#undef DEBUG
|
|
|
|
#define MAX_NODE_NAME_SIZE (20 - 12)
|
|
|
|
static struct macio_chip *macio_on_hold;
|
|
|
|
static int macio_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
const struct of_device_id * matches = drv->of_match_table;
|
|
|
|
if (!matches)
|
|
return 0;
|
|
|
|
return of_match_device(matches, dev) != NULL;
|
|
}
|
|
|
|
struct macio_dev *macio_dev_get(struct macio_dev *dev)
|
|
{
|
|
struct device *tmp;
|
|
|
|
if (!dev)
|
|
return NULL;
|
|
tmp = get_device(&dev->ofdev.dev);
|
|
if (tmp)
|
|
return to_macio_device(tmp);
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
void macio_dev_put(struct macio_dev *dev)
|
|
{
|
|
if (dev)
|
|
put_device(&dev->ofdev.dev);
|
|
}
|
|
|
|
|
|
static int macio_device_probe(struct device *dev)
|
|
{
|
|
int error = -ENODEV;
|
|
struct macio_driver *drv;
|
|
struct macio_dev *macio_dev;
|
|
const struct of_device_id *match;
|
|
|
|
drv = to_macio_driver(dev->driver);
|
|
macio_dev = to_macio_device(dev);
|
|
|
|
if (!drv->probe)
|
|
return error;
|
|
|
|
macio_dev_get(macio_dev);
|
|
|
|
match = of_match_device(drv->driver.of_match_table, dev);
|
|
if (match)
|
|
error = drv->probe(macio_dev, match);
|
|
if (error)
|
|
macio_dev_put(macio_dev);
|
|
|
|
return error;
|
|
}
|
|
|
|
static void macio_device_remove(struct device *dev)
|
|
{
|
|
struct macio_dev * macio_dev = to_macio_device(dev);
|
|
struct macio_driver * drv = to_macio_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->remove)
|
|
drv->remove(macio_dev);
|
|
macio_dev_put(macio_dev);
|
|
}
|
|
|
|
static void macio_device_shutdown(struct device *dev)
|
|
{
|
|
struct macio_dev * macio_dev = to_macio_device(dev);
|
|
struct macio_driver * drv = to_macio_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->shutdown)
|
|
drv->shutdown(macio_dev);
|
|
}
|
|
|
|
static int macio_device_suspend(struct device *dev, pm_message_t state)
|
|
{
|
|
struct macio_dev * macio_dev = to_macio_device(dev);
|
|
struct macio_driver * drv = to_macio_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->suspend)
|
|
return drv->suspend(macio_dev, state);
|
|
return 0;
|
|
}
|
|
|
|
static int macio_device_resume(struct device * dev)
|
|
{
|
|
struct macio_dev * macio_dev = to_macio_device(dev);
|
|
struct macio_driver * drv = to_macio_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->resume)
|
|
return drv->resume(macio_dev);
|
|
return 0;
|
|
}
|
|
|
|
static int macio_device_modalias(const struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
return of_device_uevent_modalias(dev, env);
|
|
}
|
|
|
|
extern const struct attribute_group *macio_dev_groups[];
|
|
|
|
struct bus_type macio_bus_type = {
|
|
.name = "macio",
|
|
.match = macio_bus_match,
|
|
.uevent = macio_device_modalias,
|
|
.probe = macio_device_probe,
|
|
.remove = macio_device_remove,
|
|
.shutdown = macio_device_shutdown,
|
|
.suspend = macio_device_suspend,
|
|
.resume = macio_device_resume,
|
|
.dev_groups = macio_dev_groups,
|
|
};
|
|
|
|
static int __init macio_bus_driver_init(void)
|
|
{
|
|
return bus_register(&macio_bus_type);
|
|
}
|
|
|
|
postcore_initcall(macio_bus_driver_init);
|
|
|
|
|
|
/**
|
|
* macio_release_dev - free a macio device structure when all users of it are
|
|
* finished.
|
|
* @dev: device that's been disconnected
|
|
*
|
|
* Will be called only by the device core when all users of this macio device
|
|
* are done. This currently means never as we don't hot remove any macio
|
|
* device yet, though that will happen with mediabay based devices in a later
|
|
* implementation.
|
|
*/
|
|
static void macio_release_dev(struct device *dev)
|
|
{
|
|
struct macio_dev *mdev;
|
|
|
|
mdev = to_macio_device(dev);
|
|
kfree(mdev);
|
|
}
|
|
|
|
/**
|
|
* macio_resource_quirks - tweak or skip some resources for a device
|
|
* @np: pointer to the device node
|
|
* @res: resulting resource
|
|
* @index: index of resource in node
|
|
*
|
|
* If this routine returns non-null, then the resource is completely
|
|
* skipped.
|
|
*/
|
|
static int macio_resource_quirks(struct device_node *np, struct resource *res,
|
|
int index)
|
|
{
|
|
/* Only quirks for memory resources for now */
|
|
if ((res->flags & IORESOURCE_MEM) == 0)
|
|
return 0;
|
|
|
|
/* Grand Central has too large resource 0 on some machines */
|
|
if (index == 0 && of_node_name_eq(np, "gc"))
|
|
res->end = res->start + 0x1ffff;
|
|
|
|
/* Airport has bogus resource 2 */
|
|
if (index >= 2 && of_node_name_eq(np, "radio"))
|
|
return 1;
|
|
|
|
#ifndef CONFIG_PPC64
|
|
/* DBDMAs may have bogus sizes */
|
|
if ((res->start & 0x0001f000) == 0x00008000)
|
|
res->end = res->start + 0xff;
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
/* ESCC parent eats child resources. We could have added a
|
|
* level of hierarchy, but I don't really feel the need
|
|
* for it
|
|
*/
|
|
if (of_node_name_eq(np, "escc"))
|
|
return 1;
|
|
|
|
/* ESCC has bogus resources >= 3 */
|
|
if (index >= 3 && (of_node_name_eq(np, "ch-a") ||
|
|
of_node_name_eq(np, "ch-b")))
|
|
return 1;
|
|
|
|
/* Media bay has too many resources, keep only first one */
|
|
if (index > 0 && of_node_name_eq(np, "media-bay"))
|
|
return 1;
|
|
|
|
/* Some older IDE resources have bogus sizes */
|
|
if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
|
|
of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
|
|
if (index == 0 && (res->end - res->start) > 0xfff)
|
|
res->end = res->start + 0xfff;
|
|
if (index == 1 && (res->end - res->start) > 0xff)
|
|
res->end = res->start + 0xff;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void macio_create_fixup_irq(struct macio_dev *dev, int index,
|
|
unsigned int line)
|
|
{
|
|
unsigned int irq;
|
|
|
|
irq = irq_create_mapping(NULL, line);
|
|
if (!irq) {
|
|
dev->interrupt[index].start = irq;
|
|
dev->interrupt[index].flags = IORESOURCE_IRQ;
|
|
dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
|
|
}
|
|
if (dev->n_interrupts <= index)
|
|
dev->n_interrupts = index + 1;
|
|
}
|
|
|
|
static void macio_add_missing_resources(struct macio_dev *dev)
|
|
{
|
|
struct device_node *np = dev->ofdev.dev.of_node;
|
|
unsigned int irq_base;
|
|
|
|
/* Gatwick has some missing interrupts on child nodes */
|
|
if (dev->bus->chip->type != macio_gatwick)
|
|
return;
|
|
|
|
/* irq_base is always 64 on gatwick. I have no cleaner way to get
|
|
* that value from here at this point
|
|
*/
|
|
irq_base = 64;
|
|
|
|
/* Fix SCC */
|
|
if (of_node_name_eq(np, "ch-a")) {
|
|
macio_create_fixup_irq(dev, 0, 15 + irq_base);
|
|
macio_create_fixup_irq(dev, 1, 4 + irq_base);
|
|
macio_create_fixup_irq(dev, 2, 5 + irq_base);
|
|
printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
|
|
}
|
|
|
|
/* Fix media-bay */
|
|
if (of_node_name_eq(np, "media-bay")) {
|
|
macio_create_fixup_irq(dev, 0, 29 + irq_base);
|
|
printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
|
|
}
|
|
|
|
/* Fix left media bay childs */
|
|
if (dev->media_bay != NULL && of_node_name_eq(np, "floppy")) {
|
|
macio_create_fixup_irq(dev, 0, 19 + irq_base);
|
|
macio_create_fixup_irq(dev, 1, 1 + irq_base);
|
|
printk(KERN_INFO "macio: fixed left floppy irqs\n");
|
|
}
|
|
if (dev->media_bay != NULL && of_node_name_eq(np, "ata4")) {
|
|
macio_create_fixup_irq(dev, 0, 14 + irq_base);
|
|
macio_create_fixup_irq(dev, 0, 3 + irq_base);
|
|
printk(KERN_INFO "macio: fixed left ide irqs\n");
|
|
}
|
|
}
|
|
|
|
static void macio_setup_interrupts(struct macio_dev *dev)
|
|
{
|
|
struct device_node *np = dev->ofdev.dev.of_node;
|
|
unsigned int irq;
|
|
int i = 0, j = 0;
|
|
|
|
for (;;) {
|
|
struct resource *res;
|
|
|
|
if (j >= MACIO_DEV_COUNT_IRQS)
|
|
break;
|
|
res = &dev->interrupt[j];
|
|
irq = irq_of_parse_and_map(np, i++);
|
|
if (!irq)
|
|
break;
|
|
res->start = irq;
|
|
res->flags = IORESOURCE_IRQ;
|
|
res->name = dev_name(&dev->ofdev.dev);
|
|
if (macio_resource_quirks(np, res, i - 1)) {
|
|
memset(res, 0, sizeof(struct resource));
|
|
continue;
|
|
} else
|
|
j++;
|
|
}
|
|
dev->n_interrupts = j;
|
|
}
|
|
|
|
static void macio_setup_resources(struct macio_dev *dev,
|
|
struct resource *parent_res)
|
|
{
|
|
struct device_node *np = dev->ofdev.dev.of_node;
|
|
struct resource r;
|
|
int index;
|
|
|
|
for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
|
|
struct resource *res;
|
|
if (index >= MACIO_DEV_COUNT_RESOURCES)
|
|
break;
|
|
res = &dev->resource[index];
|
|
*res = r;
|
|
res->name = dev_name(&dev->ofdev.dev);
|
|
|
|
if (macio_resource_quirks(np, res, index)) {
|
|
memset(res, 0, sizeof(struct resource));
|
|
continue;
|
|
}
|
|
/* Currently, we consider failure as harmless, this may
|
|
* change in the future, once I've found all the device
|
|
* tree bugs in older machines & worked around them
|
|
*/
|
|
if (insert_resource(parent_res, res)) {
|
|
printk(KERN_WARNING "Can't request resource "
|
|
"%d for MacIO device %s\n",
|
|
index, dev_name(&dev->ofdev.dev));
|
|
}
|
|
}
|
|
dev->n_resources = index;
|
|
}
|
|
|
|
/**
|
|
* macio_add_one_device - Add one device from OF node to the device tree
|
|
* @chip: pointer to the macio_chip holding the device
|
|
* @np: pointer to the device node in the OF tree
|
|
* @in_bay: set to 1 if device is part of a media-bay
|
|
*
|
|
* When media-bay is changed to hotswap drivers, this function will
|
|
* be exposed to the bay driver some way...
|
|
*/
|
|
static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
|
|
struct device *parent,
|
|
struct device_node *np,
|
|
struct macio_dev *in_bay,
|
|
struct resource *parent_res)
|
|
{
|
|
char name[MAX_NODE_NAME_SIZE + 1];
|
|
struct macio_dev *dev;
|
|
const u32 *reg;
|
|
|
|
if (np == NULL)
|
|
return NULL;
|
|
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
|
if (!dev)
|
|
return NULL;
|
|
|
|
dev->bus = &chip->lbus;
|
|
dev->media_bay = in_bay;
|
|
dev->ofdev.dev.of_node = np;
|
|
dev->ofdev.archdata.dma_mask = 0xffffffffUL;
|
|
dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
|
|
dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask;
|
|
dev->ofdev.dev.parent = parent;
|
|
dev->ofdev.dev.bus = &macio_bus_type;
|
|
dev->ofdev.dev.release = macio_release_dev;
|
|
dev->ofdev.dev.dma_parms = &dev->dma_parms;
|
|
|
|
/* Standard DMA paremeters */
|
|
dma_set_max_seg_size(&dev->ofdev.dev, 65536);
|
|
dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
|
|
|
|
#if defined(CONFIG_PCI) && defined(CONFIG_DMA_OPS)
|
|
/* Set the DMA ops to the ones from the PCI device, this could be
|
|
* fishy if we didn't know that on PowerMac it's always direct ops
|
|
* or iommu ops that will work fine
|
|
*
|
|
* To get all the fields, copy all archdata
|
|
*/
|
|
dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
|
|
dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
|
|
#endif /* CONFIG_PCI && CONFIG_DMA_OPS */
|
|
|
|
#ifdef DEBUG
|
|
printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
|
|
dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
|
|
#endif
|
|
|
|
/* MacIO itself has a different reg, we use it's PCI base */
|
|
snprintf(name, sizeof(name), "%pOFn", np);
|
|
if (np == chip->of_node) {
|
|
dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
|
|
chip->lbus.index,
|
|
#ifdef CONFIG_PCI
|
|
(unsigned int)pci_resource_start(chip->lbus.pdev, 0),
|
|
#else
|
|
0, /* NuBus may want to do something better here */
|
|
#endif
|
|
MAX_NODE_NAME_SIZE, name);
|
|
} else {
|
|
reg = of_get_property(np, "reg", NULL);
|
|
dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
|
|
chip->lbus.index,
|
|
reg ? *reg : 0, MAX_NODE_NAME_SIZE, name);
|
|
}
|
|
|
|
/* Setup interrupts & resources */
|
|
macio_setup_interrupts(dev);
|
|
macio_setup_resources(dev, parent_res);
|
|
macio_add_missing_resources(dev);
|
|
|
|
/* Register with core */
|
|
if (of_device_register(&dev->ofdev) != 0) {
|
|
printk(KERN_DEBUG"macio: device registration error for %s!\n",
|
|
dev_name(&dev->ofdev.dev));
|
|
put_device(&dev->ofdev.dev);
|
|
return NULL;
|
|
}
|
|
|
|
return dev;
|
|
}
|
|
|
|
static int macio_skip_device(struct device_node *np)
|
|
{
|
|
return of_node_name_prefix(np, "battery") ||
|
|
of_node_name_prefix(np, "escc-legacy");
|
|
}
|
|
|
|
/**
|
|
* macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
|
|
* @chip: pointer to the macio_chip holding the devices
|
|
*
|
|
* This function will do the job of extracting devices from the
|
|
* Open Firmware device tree, build macio_dev structures and add
|
|
* them to the Linux device tree.
|
|
*
|
|
* For now, childs of media-bay are added now as well. This will
|
|
* change rsn though.
|
|
*/
|
|
static void macio_pci_add_devices(struct macio_chip *chip)
|
|
{
|
|
struct device_node *np, *pnode;
|
|
struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
|
|
struct device *parent = NULL;
|
|
struct resource *root_res = &iomem_resource;
|
|
|
|
/* Add a node for the macio bus itself */
|
|
#ifdef CONFIG_PCI
|
|
if (chip->lbus.pdev) {
|
|
parent = &chip->lbus.pdev->dev;
|
|
root_res = &chip->lbus.pdev->resource[0];
|
|
}
|
|
#endif
|
|
pnode = of_node_get(chip->of_node);
|
|
if (pnode == NULL)
|
|
return;
|
|
|
|
/* Add macio itself to hierarchy */
|
|
rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
|
|
if (rdev == NULL)
|
|
return;
|
|
root_res = &rdev->resource[0];
|
|
|
|
/* First scan 1st level */
|
|
for_each_child_of_node(pnode, np) {
|
|
if (macio_skip_device(np))
|
|
continue;
|
|
of_node_get(np);
|
|
mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
|
|
root_res);
|
|
if (mdev == NULL)
|
|
of_node_put(np);
|
|
else if (of_node_name_prefix(np, "media-bay"))
|
|
mbdev = mdev;
|
|
else if (of_node_name_prefix(np, "escc"))
|
|
sdev = mdev;
|
|
}
|
|
|
|
/* Add media bay devices if any */
|
|
if (mbdev) {
|
|
pnode = mbdev->ofdev.dev.of_node;
|
|
for_each_child_of_node(pnode, np) {
|
|
if (macio_skip_device(np))
|
|
continue;
|
|
of_node_get(np);
|
|
if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
|
|
mbdev, root_res) == NULL)
|
|
of_node_put(np);
|
|
}
|
|
}
|
|
|
|
/* Add serial ports if any */
|
|
if (sdev) {
|
|
pnode = sdev->ofdev.dev.of_node;
|
|
for_each_child_of_node(pnode, np) {
|
|
if (macio_skip_device(np))
|
|
continue;
|
|
of_node_get(np);
|
|
if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
|
|
NULL, root_res) == NULL)
|
|
of_node_put(np);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* macio_register_driver - Registers a new MacIO device driver
|
|
* @drv: pointer to the driver definition structure
|
|
*/
|
|
int macio_register_driver(struct macio_driver *drv)
|
|
{
|
|
/* initialize common driver fields */
|
|
drv->driver.bus = &macio_bus_type;
|
|
|
|
/* register with core */
|
|
return driver_register(&drv->driver);
|
|
}
|
|
|
|
/**
|
|
* macio_unregister_driver - Unregisters a new MacIO device driver
|
|
* @drv: pointer to the driver definition structure
|
|
*/
|
|
void macio_unregister_driver(struct macio_driver *drv)
|
|
{
|
|
driver_unregister(&drv->driver);
|
|
}
|
|
|
|
/* Managed MacIO resources */
|
|
struct macio_devres {
|
|
u32 res_mask;
|
|
};
|
|
|
|
static void maciom_release(struct device *gendev, void *res)
|
|
{
|
|
struct macio_dev *dev = to_macio_device(gendev);
|
|
struct macio_devres *dr = res;
|
|
int i, max;
|
|
|
|
max = min(dev->n_resources, 32);
|
|
for (i = 0; i < max; i++) {
|
|
if (dr->res_mask & (1 << i))
|
|
macio_release_resource(dev, i);
|
|
}
|
|
}
|
|
|
|
int macio_enable_devres(struct macio_dev *dev)
|
|
{
|
|
struct macio_devres *dr;
|
|
|
|
dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
|
|
if (!dr) {
|
|
dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
|
|
if (!dr)
|
|
return -ENOMEM;
|
|
}
|
|
return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
|
|
}
|
|
|
|
static struct macio_devres * find_macio_dr(struct macio_dev *dev)
|
|
{
|
|
return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
|
|
}
|
|
|
|
/**
|
|
* macio_request_resource - Request an MMIO resource
|
|
* @dev: pointer to the device holding the resource
|
|
* @resource_no: resource number to request
|
|
* @name: resource name
|
|
*
|
|
* Mark memory region number @resource_no associated with MacIO
|
|
* device @dev as being reserved by owner @name. Do not access
|
|
* any address inside the memory regions unless this call returns
|
|
* successfully.
|
|
*
|
|
* Returns 0 on success, or %EBUSY on error. A warning
|
|
* message is also printed on failure.
|
|
*/
|
|
int macio_request_resource(struct macio_dev *dev, int resource_no,
|
|
const char *name)
|
|
{
|
|
struct macio_devres *dr = find_macio_dr(dev);
|
|
|
|
if (macio_resource_len(dev, resource_no) == 0)
|
|
return 0;
|
|
|
|
if (!request_mem_region(macio_resource_start(dev, resource_no),
|
|
macio_resource_len(dev, resource_no),
|
|
name))
|
|
goto err_out;
|
|
|
|
if (dr && resource_no < 32)
|
|
dr->res_mask |= 1 << resource_no;
|
|
|
|
return 0;
|
|
|
|
err_out:
|
|
printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
|
|
" for device %s\n",
|
|
resource_no,
|
|
macio_resource_len(dev, resource_no),
|
|
macio_resource_start(dev, resource_no),
|
|
dev_name(&dev->ofdev.dev));
|
|
return -EBUSY;
|
|
}
|
|
|
|
/**
|
|
* macio_release_resource - Release an MMIO resource
|
|
* @dev: pointer to the device holding the resource
|
|
* @resource_no: resource number to release
|
|
*/
|
|
void macio_release_resource(struct macio_dev *dev, int resource_no)
|
|
{
|
|
struct macio_devres *dr = find_macio_dr(dev);
|
|
|
|
if (macio_resource_len(dev, resource_no) == 0)
|
|
return;
|
|
release_mem_region(macio_resource_start(dev, resource_no),
|
|
macio_resource_len(dev, resource_no));
|
|
if (dr && resource_no < 32)
|
|
dr->res_mask &= ~(1 << resource_no);
|
|
}
|
|
|
|
/**
|
|
* macio_request_resources - Reserve all memory resources
|
|
* @dev: MacIO device whose resources are to be reserved
|
|
* @name: Name to be associated with resource.
|
|
*
|
|
* Mark all memory regions associated with MacIO device @dev as
|
|
* being reserved by owner @name. Do not access any address inside
|
|
* the memory regions unless this call returns successfully.
|
|
*
|
|
* Returns 0 on success, or %EBUSY on error. A warning
|
|
* message is also printed on failure.
|
|
*/
|
|
int macio_request_resources(struct macio_dev *dev, const char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < dev->n_resources; i++)
|
|
if (macio_request_resource(dev, i, name))
|
|
goto err_out;
|
|
return 0;
|
|
|
|
err_out:
|
|
while(--i >= 0)
|
|
macio_release_resource(dev, i);
|
|
|
|
return -EBUSY;
|
|
}
|
|
|
|
/**
|
|
* macio_release_resources - Release reserved memory resources
|
|
* @dev: MacIO device whose resources were previously reserved
|
|
*/
|
|
|
|
void macio_release_resources(struct macio_dev *dev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < dev->n_resources; i++)
|
|
macio_release_resource(dev, i);
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
struct device_node* np;
|
|
struct macio_chip* chip;
|
|
|
|
if (ent->vendor != PCI_VENDOR_ID_APPLE)
|
|
return -ENODEV;
|
|
|
|
/* Note regarding refcounting: We assume pci_device_to_OF_node() is
|
|
* ported to new OF APIs and returns a node with refcount incremented.
|
|
*/
|
|
np = pci_device_to_OF_node(pdev);
|
|
if (np == NULL)
|
|
return -ENODEV;
|
|
|
|
/* The above assumption is wrong !!!
|
|
* fix that here for now until I fix the arch code
|
|
*/
|
|
of_node_get(np);
|
|
|
|
/* We also assume that pmac_feature will have done a get() on nodes
|
|
* stored in the macio chips array
|
|
*/
|
|
chip = macio_find(np, macio_unknown);
|
|
of_node_put(np);
|
|
if (chip == NULL)
|
|
return -ENODEV;
|
|
|
|
/* XXX Need locking ??? */
|
|
if (chip->lbus.pdev == NULL) {
|
|
chip->lbus.pdev = pdev;
|
|
chip->lbus.chip = chip;
|
|
pci_set_drvdata(pdev, &chip->lbus);
|
|
pci_set_master(pdev);
|
|
}
|
|
|
|
printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
|
|
chip->name);
|
|
|
|
/*
|
|
* HACK ALERT: The WallStreet PowerBook and some OHare based machines
|
|
* have 2 macio ASICs. I must probe the "main" one first or IDE
|
|
* ordering will be incorrect. So I put on "hold" the second one since
|
|
* it seem to appear first on PCI
|
|
*/
|
|
if (chip->type == macio_gatwick || chip->type == macio_ohareII)
|
|
if (macio_chips[0].lbus.pdev == NULL) {
|
|
macio_on_hold = chip;
|
|
return 0;
|
|
}
|
|
|
|
macio_pci_add_devices(chip);
|
|
if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
|
|
macio_pci_add_devices(macio_on_hold);
|
|
macio_on_hold = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void macio_pci_remove(struct pci_dev* pdev)
|
|
{
|
|
panic("removing of macio-asic not supported !\n");
|
|
}
|
|
|
|
/*
|
|
* MacIO is matched against any Apple ID, it's probe() function
|
|
* will then decide wether it applies or not
|
|
*/
|
|
static const struct pci_device_id pci_ids[] = { {
|
|
.vendor = PCI_VENDOR_ID_APPLE,
|
|
.device = PCI_ANY_ID,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
|
|
}, { /* end: all zeroes */ }
|
|
};
|
|
MODULE_DEVICE_TABLE (pci, pci_ids);
|
|
|
|
/* pci driver glue; this is a "new style" PCI driver module */
|
|
static struct pci_driver macio_pci_driver = {
|
|
.name = "macio",
|
|
.id_table = pci_ids,
|
|
|
|
.probe = macio_pci_probe,
|
|
.remove = macio_pci_remove,
|
|
};
|
|
|
|
#endif /* CONFIG_PCI */
|
|
|
|
static int __init macio_module_init (void)
|
|
{
|
|
#ifdef CONFIG_PCI
|
|
int rc;
|
|
|
|
rc = pci_register_driver(&macio_pci_driver);
|
|
if (rc)
|
|
return rc;
|
|
#endif /* CONFIG_PCI */
|
|
return 0;
|
|
}
|
|
|
|
module_init(macio_module_init);
|
|
|
|
EXPORT_SYMBOL(macio_register_driver);
|
|
EXPORT_SYMBOL(macio_unregister_driver);
|
|
EXPORT_SYMBOL(macio_dev_get);
|
|
EXPORT_SYMBOL(macio_dev_put);
|
|
EXPORT_SYMBOL(macio_request_resource);
|
|
EXPORT_SYMBOL(macio_release_resource);
|
|
EXPORT_SYMBOL(macio_request_resources);
|
|
EXPORT_SYMBOL(macio_release_resources);
|
|
EXPORT_SYMBOL(macio_enable_devres);
|
|
|