mirror of https://gitee.com/openkylin/linux.git
[PATCH] powerpc: convert macio_asic to use prom_parse
Converts the macio_asic core to use the new OF parsing routines instead of relying on the pre-parsed values in struct device_node. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt
Paul Mackerras
parent
d7f3945420
commit
2c5bd01f8f
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@ -3,6 +3,13 @@
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* a MacIO ASIC. Interface to new driver model mostly
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* stolen from the PCI version.
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*
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* Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* TODO:
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*
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* - Don't probe below media bay by default, but instead provide
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@ -218,12 +225,14 @@ postcore_initcall(macio_bus_driver_init);
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/**
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* macio_release_dev - free a macio device structure when all users of it are finished.
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* macio_release_dev - free a macio device structure when all users of it are
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* finished.
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* @dev: device that's been disconnected
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*
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* Will be called only by the device core when all users of this macio device are
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* done. This currently means never as we don't hot remove any macio device yet,
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* though that will happen with mediabay based devices in a later implementation.
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* Will be called only by the device core when all users of this macio device
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* are done. This currently means never as we don't hot remove any macio
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* device yet, though that will happen with mediabay based devices in a later
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* implementation.
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*/
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static void macio_release_dev(struct device *dev)
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{
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@ -242,7 +251,8 @@ static void macio_release_dev(struct device *dev)
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* If this routine returns non-null, then the resource is completely
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* skipped.
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*/
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static int macio_resource_quirks(struct device_node *np, struct resource *res, int index)
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static int macio_resource_quirks(struct device_node *np, struct resource *res,
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int index)
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{
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if (res->flags & IORESOURCE_MEM) {
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/* Grand Central has too large resource 0 on some machines */
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@ -258,12 +268,15 @@ static int macio_resource_quirks(struct device_node *np, struct resource *res, i
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np->addrs[index].size = 0x100;
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res->end = res->start + 0xff;
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}
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/* ESCC parent eats child resources. We could have added a level of hierarchy,
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* but I don't really feel the need for it */
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/* ESCC parent eats child resources. We could have added a
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* level of hierarchy, but I don't really feel the need
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* for it
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*/
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if (!strcmp(np->name, "escc"))
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return 1;
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/* ESCC has bogus resources >= 3 */
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if (index >= 3 && !(strcmp(np->name, "ch-a") && strcmp(np->name, "ch-b")))
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if (index >= 3 && !(strcmp(np->name, "ch-a") &&
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strcmp(np->name, "ch-b")))
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return 1;
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/* Media bay has too many resources, keep only first one */
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if (index > 0 && !strcmp(np->name, "media-bay"))
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@ -285,6 +298,71 @@ static int macio_resource_quirks(struct device_node *np, struct resource *res, i
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}
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static void macio_setup_interrupts(struct macio_dev *dev)
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{
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struct device_node *np = dev->ofdev.node;
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int i,j;
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/* For now, we use pre-parsed entries in the device-tree for
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* interrupt routing and addresses, but we should change that
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* to dynamically parsed entries and so get rid of most of the
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* clutter in struct device_node
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*/
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for (i = j = 0; i < np->n_intrs; i++) {
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struct resource *res = &dev->interrupt[j];
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if (j >= MACIO_DEV_COUNT_IRQS)
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break;
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res->start = np->intrs[i].line;
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res->flags = IORESOURCE_IO;
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if (np->intrs[j].sense)
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res->flags |= IORESOURCE_IRQ_LOWLEVEL;
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else
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res->flags |= IORESOURCE_IRQ_HIGHEDGE;
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res->name = dev->ofdev.dev.bus_id;
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if (macio_resource_quirks(np, res, i))
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memset(res, 0, sizeof(struct resource));
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else
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j++;
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}
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dev->n_interrupts = j;
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}
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static void macio_setup_resources(struct macio_dev *dev,
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struct resource *parent_res)
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{
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struct device_node *np = dev->ofdev.node;
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u32 *addr;
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u64 size;
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int index;
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for (index = 0; (addr = of_get_address(np, index, &size)) != NULL;
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index++) {
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struct resource *res = &dev->resource[index];
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if (index >= MACIO_DEV_COUNT_RESOURCES)
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break;
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res->start = of_translate_address(np, addr);
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res->end = res->start + (unsigned long)size - 1;
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res->flags = IORESOURCE_MEM;
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res->name = dev->ofdev.dev.bus_id;
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if (macio_resource_quirks(np, res, index)) {
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memset(res, 0, sizeof(struct resource));
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continue;
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}
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/* Currently, we consider failure as harmless, this may
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* change in the future, once I've found all the device
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* tree bugs in older machines & worked around them
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*/
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if (insert_resource(parent_res, res)) {
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printk(KERN_WARNING "Can't request resource "
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"%d for MacIO device %s\n",
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index, dev->ofdev.dev.bus_id);
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}
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}
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dev->n_resources = index;
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}
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/**
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* macio_add_one_device - Add one device from OF node to the device tree
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* @chip: pointer to the macio_chip holding the device
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@ -294,12 +372,13 @@ static int macio_resource_quirks(struct device_node *np, struct resource *res, i
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* When media-bay is changed to hotswap drivers, this function will
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* be exposed to the bay driver some way...
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*/
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static struct macio_dev * macio_add_one_device(struct macio_chip *chip, struct device *parent,
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struct device_node *np, struct macio_dev *in_bay,
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static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
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struct device *parent,
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struct device_node *np,
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struct macio_dev *in_bay,
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struct resource *parent_res)
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{
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struct macio_dev *dev;
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int i, j;
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u32 *reg;
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if (np == NULL)
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@ -326,7 +405,8 @@ static struct macio_dev * macio_add_one_device(struct macio_chip *chip, struct d
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/* MacIO itself has a different reg, we use it's PCI base */
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if (np == chip->of_node) {
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sprintf(dev->ofdev.dev.bus_id, "%1d.%08lx:%.*s", chip->lbus.index,
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sprintf(dev->ofdev.dev.bus_id, "%1d.%08lx:%.*s",
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chip->lbus.index,
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#ifdef CONFIG_PCI
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pci_resource_start(chip->lbus.pdev, 0),
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#else
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@ -335,57 +415,16 @@ static struct macio_dev * macio_add_one_device(struct macio_chip *chip, struct d
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MAX_NODE_NAME_SIZE, np->name);
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} else {
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reg = (u32 *)get_property(np, "reg", NULL);
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sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s", chip->lbus.index,
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sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s",
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chip->lbus.index,
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reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
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}
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/* For now, we use pre-parsed entries in the device-tree for
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* interrupt routing and addresses, but we should change that
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* to dynamically parsed entries and so get rid of most of the
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* clutter in struct device_node
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*/
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for (i = j = 0; i < np->n_intrs; i++) {
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struct resource *res = &dev->interrupt[j];
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if (j >= MACIO_DEV_COUNT_IRQS)
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break;
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res->start = np->intrs[i].line;
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res->flags = IORESOURCE_IO;
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if (np->intrs[j].sense)
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res->flags |= IORESOURCE_IRQ_LOWLEVEL;
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else
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res->flags |= IORESOURCE_IRQ_HIGHEDGE;
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res->name = dev->ofdev.dev.bus_id;
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if (macio_resource_quirks(np, res, i))
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memset(res, 0, sizeof(struct resource));
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else
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j++;
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}
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dev->n_interrupts = j;
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for (i = j = 0; i < np->n_addrs; i++) {
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struct resource *res = &dev->resource[j];
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if (j >= MACIO_DEV_COUNT_RESOURCES)
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break;
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res->start = np->addrs[i].address;
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res->end = np->addrs[i].address + np->addrs[i].size - 1;
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res->flags = IORESOURCE_MEM;
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res->name = dev->ofdev.dev.bus_id;
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if (macio_resource_quirks(np, res, i))
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memset(res, 0, sizeof(struct resource));
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else {
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j++;
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/* Currently, we consider failure as harmless, this may
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* change in the future, once I've found all the device
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* tree bugs in older machines & worked around them
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*/
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if (insert_resource(parent_res, res))
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printk(KERN_WARNING "Can't request resource %d for MacIO"
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" device %s\n", i, dev->ofdev.dev.bus_id);
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}
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}
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dev->n_resources = j;
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/* Setup interrupts & resources */
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macio_setup_interrupts(dev);
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macio_setup_resources(dev, parent_res);
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/* Register with core */
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if (of_device_register(&dev->ofdev) != 0) {
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printk(KERN_DEBUG"macio: device registration error for %s!\n",
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dev->ofdev.dev.bus_id);
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@ -442,36 +481,42 @@ static void macio_pci_add_devices(struct macio_chip *chip)
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/* First scan 1st level */
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for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
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if (!macio_skip_device(np)) {
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of_node_get(np);
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mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL, root_res);
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if (mdev == NULL)
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of_node_put(np);
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else if (strncmp(np->name, "media-bay", 9) == 0)
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mbdev = mdev;
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else if (strncmp(np->name, "escc", 4) == 0)
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sdev = mdev;
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}
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if (macio_skip_device(np))
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continue;
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of_node_get(np);
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mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
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root_res);
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if (mdev == NULL)
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of_node_put(np);
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else if (strncmp(np->name, "media-bay", 9) == 0)
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mbdev = mdev;
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else if (strncmp(np->name, "escc", 4) == 0)
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sdev = mdev;
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}
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/* Add media bay devices if any */
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if (mbdev)
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for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np)) != NULL;)
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if (!macio_skip_device(np)) {
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of_node_get(np);
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if (macio_add_one_device(chip, &mbdev->ofdev.dev, np, mbdev,
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root_res) == NULL)
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of_node_put(np);
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}
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for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np))
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!= NULL;) {
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if (macio_skip_device(np))
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continue;
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of_node_get(np);
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if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
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mbdev, root_res) == NULL)
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of_node_put(np);
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}
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/* Add serial ports if any */
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if (sdev) {
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for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np)) != NULL;)
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if (!macio_skip_device(np)) {
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of_node_get(np);
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if (macio_add_one_device(chip, &sdev->ofdev.dev, np, NULL,
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root_res) == NULL)
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of_node_put(np);
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}
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for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np))
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!= NULL;) {
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if (macio_skip_device(np))
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continue;
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of_node_get(np);
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if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
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NULL, root_res) == NULL)
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of_node_put(np);
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}
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}
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}
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@ -519,7 +564,8 @@ void macio_unregister_driver(struct macio_driver *drv)
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* Returns 0 on success, or %EBUSY on error. A warning
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* message is also printed on failure.
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*/
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int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name)
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int macio_request_resource(struct macio_dev *dev, int resource_no,
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const char *name)
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{
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if (macio_resource_len(dev, resource_no) == 0)
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return 0;
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@ -606,20 +652,20 @@ static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_devi
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if (ent->vendor != PCI_VENDOR_ID_APPLE)
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return -ENODEV;
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/* Note regarding refcounting: We assume pci_device_to_OF_node() is ported
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* to new OF APIs and returns a node with refcount incremented. This isn't
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* the case today, but on the other hand ppc32 doesn't do refcounting. This
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* will have to be fixed when going to ppc64. --BenH.
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/* Note regarding refcounting: We assume pci_device_to_OF_node() is
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* ported to new OF APIs and returns a node with refcount incremented.
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*/
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np = pci_device_to_OF_node(pdev);
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if (np == NULL)
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return -ENODEV;
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/* This assumption is wrong, fix that here for now until I fix the arch */
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/* The above assumption is wrong !!!
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* fix that here for now until I fix the arch code
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*/
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of_node_get(np);
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/* We also assume that pmac_feature will have done a get() on nodes stored
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* in the macio chips array
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/* We also assume that pmac_feature will have done a get() on nodes
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* stored in the macio chips array
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*/
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chip = macio_find(np, macio_unknown);
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of_node_put(np);
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@ -639,9 +685,9 @@ static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_devi
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/*
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* HACK ALERT: The WallStreet PowerBook and some OHare based machines
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* have 2 macio ASICs. I must probe the "main" one first or IDE ordering
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* will be incorrect. So I put on "hold" the second one since it seem to
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* appear first on PCI
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* have 2 macio ASICs. I must probe the "main" one first or IDE
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* ordering will be incorrect. So I put on "hold" the second one since
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* it seem to appear first on PCI
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*/
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if (chip->type == macio_gatwick || chip->type == macio_ohareII)
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if (macio_chips[0].lbus.pdev == NULL) {
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