diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/macintosh/macio_asic.c | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/macintosh/macio_asic.c')
-rw-r--r-- | drivers/macintosh/macio_asic.c | 636 |
1 files changed, 636 insertions, 0 deletions
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c new file mode 100644 index 0000000..3a609ec --- /dev/null +++ b/drivers/macintosh/macio_asic.c @@ -0,0 +1,636 @@ +/* + * Bus & driver management routines for devices within + * a MacIO ASIC. Interface to new driver model mostly + * stolen from the PCI version. + * + * 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/config.h> +#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 <asm/machdep.h> +#include <asm/macio.h> +#include <asm/pmac_feature.h> +#include <asm/prom.h> +#include <asm/pci-bridge.h> + +#undef DEBUG + +#define MAX_NODE_NAME_SIZE (BUS_ID_SIZE - 12) + +static struct macio_chip *macio_on_hold; + +static int macio_bus_match(struct device *dev, struct device_driver *drv) +{ + struct macio_dev * macio_dev = to_macio_device(dev); + struct macio_driver * macio_drv = to_macio_driver(drv); + const struct of_match * matches = macio_drv->match_table; + + if (!matches) + return 0; + + return of_match_device(matches, &macio_dev->ofdev) != 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_match *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->match_table, &macio_dev->ofdev); + if (match) + error = drv->probe(macio_dev, match); + if (error) + macio_dev_put(macio_dev); + + return error; +} + +static int 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); + + return 0; +} + +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, u32 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; +} + +struct bus_type macio_bus_type = { + .name = "macio", + .match = macio_bus_match, + .suspend = macio_device_suspend, + .resume = macio_device_resume, +}; + +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) +{ + if (res->flags & IORESOURCE_MEM) { + /* Grand Central has too large resource 0 on some machines */ + if (index == 0 && !strcmp(np->name, "gc")) { + np->addrs[0].size = 0x20000; + res->end = res->start + 0x1ffff; + } + /* Airport has bogus resource 2 */ + if (index >= 2 && !strcmp(np->name, "radio")) + return 1; + /* DBDMAs may have bogus sizes */ + if ((res->start & 0x0001f000) == 0x00008000) { + np->addrs[index].size = 0x100; + res->end = res->start + 0xff; + } + /* ESCC parent eats child resources. We could have added a level of hierarchy, + * but I don't really feel the need for it */ + if (!strcmp(np->name, "escc")) + return 1; + /* ESCC has bogus resources >= 3 */ + if (index >= 3 && !(strcmp(np->name, "ch-a") && strcmp(np->name, "ch-b"))) + return 1; + /* Media bay has too many resources, keep only first one */ + if (index > 0 && !strcmp(np->name, "media-bay")) + return 1; + /* Some older IDE resources have bogus sizes */ + if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") && + strcmp(np->type, "ide") && strcmp(np->type, "ata"))) { + if (index == 0 && np->addrs[0].size > 0x1000) { + np->addrs[0].size = 0x1000; + res->end = res->start + 0xfff; + } + if (index == 1 && np->addrs[1].size > 0x100) { + np->addrs[1].size = 0x100; + res->end = res->start + 0xff; + } + } + } + return 0; +} + + +/** + * 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) +{ + struct macio_dev *dev; + int i, j; + u32 *reg; + + if (np == NULL) + return NULL; + + dev = kmalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return NULL; + memset(dev, 0, sizeof(*dev)); + + dev->bus = &chip->lbus; + dev->media_bay = in_bay; + dev->ofdev.node = np; + dev->ofdev.dma_mask = 0xffffffffUL; + dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask; + dev->ofdev.dev.parent = parent; + dev->ofdev.dev.bus = &macio_bus_type; + dev->ofdev.dev.release = macio_release_dev; + +#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 */ + if (np == chip->of_node) { + sprintf(dev->ofdev.dev.bus_id, "%1d.%08lx:%.*s", chip->lbus.index, +#ifdef CONFIG_PCI + pci_resource_start(chip->lbus.pdev, 0), +#else + 0, /* NuBus may want to do something better here */ +#endif + MAX_NODE_NAME_SIZE, np->name); + } else { + reg = (u32 *)get_property(np, "reg", NULL); + sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s", chip->lbus.index, + reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name); + } + + /* For now, we use pre-parsed entries in the device-tree for + * interrupt routing and addresses, but we should change that + * to dynamically parsed entries and so get rid of most of the + * clutter in struct device_node + */ + for (i = j = 0; i < np->n_intrs; i++) { + struct resource *res = &dev->interrupt[j]; + + if (j >= MACIO_DEV_COUNT_IRQS) + break; + res->start = np->intrs[i].line; + res->flags = IORESOURCE_IO; + if (np->intrs[j].sense) + res->flags |= IORESOURCE_IRQ_LOWLEVEL; + else + res->flags |= IORESOURCE_IRQ_HIGHEDGE; + res->name = dev->ofdev.dev.bus_id; + if (macio_resource_quirks(np, res, i)) + memset(res, 0, sizeof(struct resource)); + else + j++; + } + dev->n_interrupts = j; + for (i = j = 0; i < np->n_addrs; i++) { + struct resource *res = &dev->resource[j]; + + if (j >= MACIO_DEV_COUNT_RESOURCES) + break; + res->start = np->addrs[i].address; + res->end = np->addrs[i].address + np->addrs[i].size - 1; + res->flags = IORESOURCE_MEM; + res->name = dev->ofdev.dev.bus_id; + if (macio_resource_quirks(np, res, i)) + memset(res, 0, sizeof(struct resource)); + else { + j++; + /* 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", i, dev->ofdev.dev.bus_id); + } + } + dev->n_resources = j; + + if (of_device_register(&dev->ofdev) != 0) { + printk(KERN_DEBUG"macio: device registration error for %s!\n", + dev->ofdev.dev.bus_id); + kfree(dev); + return NULL; + } + + return dev; +} + +static int macio_skip_device(struct device_node *np) +{ + if (strncmp(np->name, "battery", 7) == 0) + return 1; + if (strncmp(np->name, "escc-legacy", 11) == 0) + return 1; + return 0; +} + +/** + * 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 (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { + if (!macio_skip_device(np)) { + 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 (strncmp(np->name, "media-bay", 9) == 0) + mbdev = mdev; + else if (strncmp(np->name, "escc", 4) == 0) + sdev = mdev; + } + } + + /* Add media bay devices if any */ + if (mbdev) + for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np)) != NULL;) + if (!macio_skip_device(np)) { + 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) { + for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np)) != NULL;) + if (!macio_skip_device(np)) { + 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) +{ + int count = 0; + + /* initialize common driver fields */ + drv->driver.name = drv->name; + drv->driver.bus = &macio_bus_type; + drv->driver.probe = macio_device_probe; + drv->driver.remove = macio_device_remove; + drv->driver.shutdown = macio_device_shutdown; + + /* register with core */ + count = driver_register(&drv->driver); + return count ? count : 1; +} + +/** + * 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); +} + +/** + * 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) +{ + 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; + + 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->ofdev.dev.bus_id); + 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) +{ + if (macio_resource_len(dev, resource_no) == 0) + return; + release_mem_region(macio_resource_start(dev, resource_no), + macio_resource_len(dev, 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 __devinit 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. This isn't + * the case today, but on the other hand ppc32 doesn't do refcounting. This + * will have to be fixed when going to ppc64. --BenH. + */ + np = pci_device_to_OF_node(pdev); + if (np == NULL) + return -ENODEV; + + /* This assumption is wrong, fix that here for now until I fix the arch */ + 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 __devexit 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 __devinitdata 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 = (char *) "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); |