of/irq: merge irq mapping code
Merge common irq mapping code between PowerPC and Microblaze. This patch merges of_irq_find_parent(), of_irq_map_raw() and of_irq_map_one(). The functions are dependent on one another, so all three are merged in a single patch. Other than cosmetic difference (ie. DBG() vs. pr_debug()), the implementations are identical. of_irq_to_resource() is also merged, but in this case the implementations are different. This patch drops the microblaze version and uses the powerpc implementation unchanged. The microblaze version essentially open-coded irq_of_parse_and_map() which it does not need to do. Therefore the powerpc version is safe to adopt. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au>
This commit is contained in:
Grant Likely
parent
b83da291b4
commit
7dc2e1134a
6 changed files with 330 additions and 634 deletions
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@ -89,34 +89,6 @@ struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
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/* Get the MAC address */
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/* Get the MAC address */
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extern const void *of_get_mac_address(struct device_node *np);
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extern const void *of_get_mac_address(struct device_node *np);
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/*
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* OF interrupt mapping
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*/
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#define OF_IMAP_OLDWORLD_MAC 0x00000001
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#define OF_IMAP_NO_PHANDLE 0x00000002
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/**
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* of_irq_map_raw - Low level interrupt tree parsing
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* @parent: the device interrupt parent
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* @intspec: interrupt specifier ("interrupts" property of the device)
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* @ointsize: size of the passed in interrupt specifier
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* @addr: address specifier (start of "reg" property of the device)
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* @out_irq: structure of_irq filled by this function
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*
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* Returns 0 on success and a negative number on error
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*
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* This function is a low-level interrupt tree walking function. It
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* can be used to do a partial walk with synthetized reg and interrupts
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* properties, for example when resolving PCI interrupts when no device
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* node exist for the parent.
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*
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*/
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extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
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u32 ointsize, const u32 *addr,
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struct of_irq *out_irq);
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/**
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/**
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* of_irq_map_pci - Resolve the interrupt for a PCI device
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* of_irq_map_pci - Resolve the interrupt for a PCI device
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* @pdev: the device whose interrupt is to be resolved
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* @pdev: the device whose interrupt is to be resolved
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@ -131,9 +103,6 @@ extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
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struct pci_dev;
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struct pci_dev;
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extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
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extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
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extern int of_irq_to_resource(struct device_node *dev, int index,
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struct resource *r);
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/**
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/**
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* of_iomap - Maps the memory mapped IO for a given device_node
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* of_iomap - Maps the memory mapped IO for a given device_node
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* @device: the device whose io range will be mapped
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* @device: the device whose io range will be mapped
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@ -644,267 +644,6 @@ void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
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*size = of_read_number(dma_window, cells);
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*size = of_read_number(dma_window, cells);
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}
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}
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/*
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* Interrupt remapper
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*/
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static unsigned int of_irq_workarounds;
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static struct device_node *of_irq_dflt_pic;
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static struct device_node *of_irq_find_parent(struct device_node *child)
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{
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struct device_node *p;
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const phandle *parp;
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if (!of_node_get(child))
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return NULL;
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do {
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parp = of_get_property(child, "interrupt-parent", NULL);
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if (parp == NULL)
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p = of_get_parent(child);
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else {
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if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
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p = of_node_get(of_irq_dflt_pic);
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else
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p = of_find_node_by_phandle(*parp);
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}
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of_node_put(child);
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child = p;
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} while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
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return p;
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}
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int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
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const u32 *addr, struct of_irq *out_irq)
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{
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struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
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const u32 *tmp, *imap, *imask;
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u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
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int imaplen, match, i;
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pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],"
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"ointsize=%d\n",
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parent->full_name, intspec[0], intspec[1], ointsize);
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ipar = of_node_get(parent);
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/* First get the #interrupt-cells property of the current cursor
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* that tells us how to interpret the passed-in intspec. If there
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* is none, we are nice and just walk up the tree
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*/
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do {
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tmp = of_get_property(ipar, "#interrupt-cells", NULL);
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if (tmp != NULL) {
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intsize = *tmp;
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break;
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}
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tnode = ipar;
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ipar = of_irq_find_parent(ipar);
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of_node_put(tnode);
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} while (ipar);
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if (ipar == NULL) {
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pr_debug(" -> no parent found !\n");
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goto fail;
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}
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pr_debug("of_irq_map_raw: ipar=%s, size=%d\n",
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ipar->full_name, intsize);
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if (ointsize != intsize)
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return -EINVAL;
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/* Look for this #address-cells. We have to implement the old linux
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* trick of looking for the parent here as some device-trees rely on it
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*/
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old = of_node_get(ipar);
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do {
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tmp = of_get_property(old, "#address-cells", NULL);
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tnode = of_get_parent(old);
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of_node_put(old);
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old = tnode;
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} while (old && tmp == NULL);
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of_node_put(old);
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old = NULL;
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addrsize = (tmp == NULL) ? 2 : *tmp;
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pr_debug(" -> addrsize=%d\n", addrsize);
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/* Now start the actual "proper" walk of the interrupt tree */
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while (ipar != NULL) {
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/* Now check if cursor is an interrupt-controller and if it is
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* then we are done
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*/
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if (of_get_property(ipar, "interrupt-controller", NULL) !=
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NULL) {
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pr_debug(" -> got it !\n");
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memcpy(out_irq->specifier, intspec,
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intsize * sizeof(u32));
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out_irq->size = intsize;
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out_irq->controller = ipar;
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of_node_put(old);
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return 0;
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}
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/* Now look for an interrupt-map */
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imap = of_get_property(ipar, "interrupt-map", &imaplen);
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/* No interrupt map, check for an interrupt parent */
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if (imap == NULL) {
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pr_debug(" -> no map, getting parent\n");
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newpar = of_irq_find_parent(ipar);
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goto skiplevel;
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}
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imaplen /= sizeof(u32);
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/* Look for a mask */
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imask = of_get_property(ipar, "interrupt-map-mask", NULL);
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/* If we were passed no "reg" property and we attempt to parse
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* an interrupt-map, then #address-cells must be 0.
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* Fail if it's not.
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*/
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if (addr == NULL && addrsize != 0) {
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pr_debug(" -> no reg passed in when needed !\n");
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goto fail;
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}
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/* Parse interrupt-map */
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match = 0;
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while (imaplen > (addrsize + intsize + 1) && !match) {
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/* Compare specifiers */
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match = 1;
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for (i = 0; i < addrsize && match; ++i) {
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u32 mask = imask ? imask[i] : 0xffffffffu;
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match = ((addr[i] ^ imap[i]) & mask) == 0;
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}
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for (; i < (addrsize + intsize) && match; ++i) {
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u32 mask = imask ? imask[i] : 0xffffffffu;
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match =
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((intspec[i-addrsize] ^ imap[i])
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& mask) == 0;
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}
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imap += addrsize + intsize;
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imaplen -= addrsize + intsize;
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pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen);
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/* Get the interrupt parent */
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if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
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newpar = of_node_get(of_irq_dflt_pic);
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else
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newpar =
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of_find_node_by_phandle((phandle)*imap);
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imap++;
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--imaplen;
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/* Check if not found */
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if (newpar == NULL) {
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pr_debug(" -> imap parent not found !\n");
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goto fail;
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}
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/* Get #interrupt-cells and #address-cells of new
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* parent
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*/
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tmp = of_get_property(newpar, "#interrupt-cells", NULL);
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if (tmp == NULL) {
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pr_debug(" -> parent lacks "
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"#interrupt-cells!\n");
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goto fail;
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}
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newintsize = *tmp;
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tmp = of_get_property(newpar, "#address-cells", NULL);
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newaddrsize = (tmp == NULL) ? 0 : *tmp;
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pr_debug(" -> newintsize=%d, newaddrsize=%d\n",
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newintsize, newaddrsize);
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/* Check for malformed properties */
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if (imaplen < (newaddrsize + newintsize))
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goto fail;
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imap += newaddrsize + newintsize;
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imaplen -= newaddrsize + newintsize;
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pr_debug(" -> imaplen=%d\n", imaplen);
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}
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if (!match)
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goto fail;
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of_node_put(old);
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old = of_node_get(newpar);
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addrsize = newaddrsize;
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intsize = newintsize;
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intspec = imap - intsize;
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addr = intspec - addrsize;
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skiplevel:
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/* Iterate again with new parent */
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pr_debug(" -> new parent: %s\n",
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newpar ? newpar->full_name : "<>");
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of_node_put(ipar);
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ipar = newpar;
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newpar = NULL;
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}
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fail:
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of_node_put(ipar);
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of_node_put(old);
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of_node_put(newpar);
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(of_irq_map_raw);
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int of_irq_map_one(struct device_node *device,
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int index, struct of_irq *out_irq)
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{
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struct device_node *p;
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const u32 *intspec, *tmp, *addr;
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u32 intsize, intlen;
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int res;
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pr_debug("of_irq_map_one: dev=%s, index=%d\n",
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device->full_name, index);
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/* Get the interrupts property */
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intspec = of_get_property(device, "interrupts", (int *) &intlen);
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if (intspec == NULL)
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return -EINVAL;
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intlen /= sizeof(u32);
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pr_debug(" intspec=%d intlen=%d\n", *intspec, intlen);
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/* Get the reg property (if any) */
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addr = of_get_property(device, "reg", NULL);
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/* Look for the interrupt parent. */
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p = of_irq_find_parent(device);
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if (p == NULL)
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return -EINVAL;
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/* Get size of interrupt specifier */
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tmp = of_get_property(p, "#interrupt-cells", NULL);
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if (tmp == NULL) {
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of_node_put(p);
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return -EINVAL;
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}
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intsize = *tmp;
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pr_debug(" intsize=%d intlen=%d\n", intsize, intlen);
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/* Check index */
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if ((index + 1) * intsize > intlen)
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return -EINVAL;
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/* Get new specifier and map it */
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res = of_irq_map_raw(p, intspec + index * intsize, intsize,
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addr, out_irq);
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of_node_put(p);
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return res;
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}
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EXPORT_SYMBOL_GPL(of_irq_map_one);
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/**
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/**
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* Search the device tree for the best MAC address to use. 'mac-address' is
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* Search the device tree for the best MAC address to use. 'mac-address' is
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* checked first, because that is supposed to contain to "most recent" MAC
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* checked first, because that is supposed to contain to "most recent" MAC
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@ -943,35 +682,6 @@ const void *of_get_mac_address(struct device_node *np)
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}
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}
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EXPORT_SYMBOL(of_get_mac_address);
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EXPORT_SYMBOL(of_get_mac_address);
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int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
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{
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struct of_irq out_irq;
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int irq;
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int res;
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res = of_irq_map_one(dev, index, &out_irq);
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/* Get irq for the device */
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if (res) {
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pr_debug("IRQ not found... code = %d", res);
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return NO_IRQ;
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}
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/* Assuming single interrupt controller... */
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irq = out_irq.specifier[0];
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pr_debug("IRQ found = %d", irq);
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/* Only dereference the resource if both the
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* resource and the irq are valid. */
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if (r && irq != NO_IRQ) {
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r->start = r->end = irq;
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r->flags = IORESOURCE_IRQ;
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}
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return irq;
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}
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EXPORT_SYMBOL_GPL(of_irq_to_resource);
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void __iomem *of_iomap(struct device_node *np, int index)
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void __iomem *of_iomap(struct device_node *np, int index)
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{
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{
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struct resource res;
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struct resource res;
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@ -105,50 +105,6 @@ struct device_node *of_find_next_cache_node(struct device_node *np);
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/* Get the MAC address */
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/* Get the MAC address */
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extern const void *of_get_mac_address(struct device_node *np);
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extern const void *of_get_mac_address(struct device_node *np);
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/*
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* OF interrupt mapping
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*/
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#define OF_IMAP_OLDWORLD_MAC 0x00000001
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#define OF_IMAP_NO_PHANDLE 0x00000002
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#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
|
|
||||||
/* Workarounds only needed for 32bit powermac machines */
|
|
||||||
extern unsigned int of_irq_workarounds;
|
|
||||||
extern struct device_node *of_irq_dflt_pic;
|
|
||||||
extern int of_irq_map_oldworld(struct device_node *device, int index,
|
|
||||||
struct of_irq *out_irq);
|
|
||||||
#else
|
|
||||||
#define of_irq_workarounds (0)
|
|
||||||
#define of_irq_dflt_pic (NULL)
|
|
||||||
static inline int of_irq_map_oldworld(struct device_node *device, int index,
|
|
||||||
struct of_irq *out_irq)
|
|
||||||
{
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/**
|
|
||||||
* of_irq_map_raw - Low level interrupt tree parsing
|
|
||||||
* @parent: the device interrupt parent
|
|
||||||
* @intspec: interrupt specifier ("interrupts" property of the device)
|
|
||||||
* @ointsize: size of the passed in interrupt specifier
|
|
||||||
* @addr: address specifier (start of "reg" property of the device)
|
|
||||||
* @out_irq: structure of_irq filled by this function
|
|
||||||
*
|
|
||||||
* Returns 0 on success and a negative number on error
|
|
||||||
*
|
|
||||||
* This function is a low-level interrupt tree walking function. It
|
|
||||||
* can be used to do a partial walk with synthetized reg and interrupts
|
|
||||||
* properties, for example when resolving PCI interrupts when no device
|
|
||||||
* node exist for the parent.
|
|
||||||
*
|
|
||||||
*/
|
|
||||||
|
|
||||||
extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
|
|
||||||
u32 ointsize, const u32 *addr,
|
|
||||||
struct of_irq *out_irq);
|
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* of_irq_map_pci - Resolve the interrupt for a PCI device
|
* of_irq_map_pci - Resolve the interrupt for a PCI device
|
||||||
* @pdev: the device whose interrupt is to be resolved
|
* @pdev: the device whose interrupt is to be resolved
|
||||||
|
|
@ -163,9 +119,6 @@ extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
|
||||||
struct pci_dev;
|
struct pci_dev;
|
||||||
extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
|
extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
|
||||||
|
|
||||||
extern int of_irq_to_resource(struct device_node *dev, int index,
|
|
||||||
struct resource *r);
|
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* of_iomap - Maps the memory mapped IO for a given device_node
|
* of_iomap - Maps the memory mapped IO for a given device_node
|
||||||
* @device: the device whose io range will be mapped
|
* @device: the device whose io range will be mapped
|
||||||
|
|
|
||||||
|
|
@ -678,257 +678,6 @@ void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
|
||||||
*size = of_read_number(dma_window, cells);
|
*size = of_read_number(dma_window, cells);
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
|
||||||
* Interrupt remapper
|
|
||||||
*/
|
|
||||||
|
|
||||||
static struct device_node *of_irq_find_parent(struct device_node *child)
|
|
||||||
{
|
|
||||||
struct device_node *p;
|
|
||||||
const phandle *parp;
|
|
||||||
|
|
||||||
if (!of_node_get(child))
|
|
||||||
return NULL;
|
|
||||||
|
|
||||||
do {
|
|
||||||
parp = of_get_property(child, "interrupt-parent", NULL);
|
|
||||||
if (parp == NULL)
|
|
||||||
p = of_get_parent(child);
|
|
||||||
else {
|
|
||||||
if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
|
|
||||||
p = of_node_get(of_irq_dflt_pic);
|
|
||||||
else
|
|
||||||
p = of_find_node_by_phandle(*parp);
|
|
||||||
}
|
|
||||||
of_node_put(child);
|
|
||||||
child = p;
|
|
||||||
} while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
|
|
||||||
|
|
||||||
return p;
|
|
||||||
}
|
|
||||||
|
|
||||||
int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
|
|
||||||
const u32 *addr, struct of_irq *out_irq)
|
|
||||||
{
|
|
||||||
struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
|
|
||||||
const u32 *tmp, *imap, *imask;
|
|
||||||
u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
|
|
||||||
int imaplen, match, i;
|
|
||||||
|
|
||||||
DBG("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],ointsize=%d\n",
|
|
||||||
parent->full_name, intspec[0], intspec[1], ointsize);
|
|
||||||
|
|
||||||
ipar = of_node_get(parent);
|
|
||||||
|
|
||||||
/* First get the #interrupt-cells property of the current cursor
|
|
||||||
* that tells us how to interpret the passed-in intspec. If there
|
|
||||||
* is none, we are nice and just walk up the tree
|
|
||||||
*/
|
|
||||||
do {
|
|
||||||
tmp = of_get_property(ipar, "#interrupt-cells", NULL);
|
|
||||||
if (tmp != NULL) {
|
|
||||||
intsize = *tmp;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
tnode = ipar;
|
|
||||||
ipar = of_irq_find_parent(ipar);
|
|
||||||
of_node_put(tnode);
|
|
||||||
} while (ipar);
|
|
||||||
if (ipar == NULL) {
|
|
||||||
DBG(" -> no parent found !\n");
|
|
||||||
goto fail;
|
|
||||||
}
|
|
||||||
|
|
||||||
DBG("of_irq_map_raw: ipar=%s, size=%d\n", ipar->full_name, intsize);
|
|
||||||
|
|
||||||
if (ointsize != intsize)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
/* Look for this #address-cells. We have to implement the old linux
|
|
||||||
* trick of looking for the parent here as some device-trees rely on it
|
|
||||||
*/
|
|
||||||
old = of_node_get(ipar);
|
|
||||||
do {
|
|
||||||
tmp = of_get_property(old, "#address-cells", NULL);
|
|
||||||
tnode = of_get_parent(old);
|
|
||||||
of_node_put(old);
|
|
||||||
old = tnode;
|
|
||||||
} while(old && tmp == NULL);
|
|
||||||
of_node_put(old);
|
|
||||||
old = NULL;
|
|
||||||
addrsize = (tmp == NULL) ? 2 : *tmp;
|
|
||||||
|
|
||||||
DBG(" -> addrsize=%d\n", addrsize);
|
|
||||||
|
|
||||||
/* Now start the actual "proper" walk of the interrupt tree */
|
|
||||||
while (ipar != NULL) {
|
|
||||||
/* Now check if cursor is an interrupt-controller and if it is
|
|
||||||
* then we are done
|
|
||||||
*/
|
|
||||||
if (of_get_property(ipar, "interrupt-controller", NULL) !=
|
|
||||||
NULL) {
|
|
||||||
DBG(" -> got it !\n");
|
|
||||||
memcpy(out_irq->specifier, intspec,
|
|
||||||
intsize * sizeof(u32));
|
|
||||||
out_irq->size = intsize;
|
|
||||||
out_irq->controller = ipar;
|
|
||||||
of_node_put(old);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Now look for an interrupt-map */
|
|
||||||
imap = of_get_property(ipar, "interrupt-map", &imaplen);
|
|
||||||
/* No interrupt map, check for an interrupt parent */
|
|
||||||
if (imap == NULL) {
|
|
||||||
DBG(" -> no map, getting parent\n");
|
|
||||||
newpar = of_irq_find_parent(ipar);
|
|
||||||
goto skiplevel;
|
|
||||||
}
|
|
||||||
imaplen /= sizeof(u32);
|
|
||||||
|
|
||||||
/* Look for a mask */
|
|
||||||
imask = of_get_property(ipar, "interrupt-map-mask", NULL);
|
|
||||||
|
|
||||||
/* If we were passed no "reg" property and we attempt to parse
|
|
||||||
* an interrupt-map, then #address-cells must be 0.
|
|
||||||
* Fail if it's not.
|
|
||||||
*/
|
|
||||||
if (addr == NULL && addrsize != 0) {
|
|
||||||
DBG(" -> no reg passed in when needed !\n");
|
|
||||||
goto fail;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Parse interrupt-map */
|
|
||||||
match = 0;
|
|
||||||
while (imaplen > (addrsize + intsize + 1) && !match) {
|
|
||||||
/* Compare specifiers */
|
|
||||||
match = 1;
|
|
||||||
for (i = 0; i < addrsize && match; ++i) {
|
|
||||||
u32 mask = imask ? imask[i] : 0xffffffffu;
|
|
||||||
match = ((addr[i] ^ imap[i]) & mask) == 0;
|
|
||||||
}
|
|
||||||
for (; i < (addrsize + intsize) && match; ++i) {
|
|
||||||
u32 mask = imask ? imask[i] : 0xffffffffu;
|
|
||||||
match =
|
|
||||||
((intspec[i-addrsize] ^ imap[i]) & mask) == 0;
|
|
||||||
}
|
|
||||||
imap += addrsize + intsize;
|
|
||||||
imaplen -= addrsize + intsize;
|
|
||||||
|
|
||||||
DBG(" -> match=%d (imaplen=%d)\n", match, imaplen);
|
|
||||||
|
|
||||||
/* Get the interrupt parent */
|
|
||||||
if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
|
|
||||||
newpar = of_node_get(of_irq_dflt_pic);
|
|
||||||
else
|
|
||||||
newpar = of_find_node_by_phandle((phandle)*imap);
|
|
||||||
imap++;
|
|
||||||
--imaplen;
|
|
||||||
|
|
||||||
/* Check if not found */
|
|
||||||
if (newpar == NULL) {
|
|
||||||
DBG(" -> imap parent not found !\n");
|
|
||||||
goto fail;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Get #interrupt-cells and #address-cells of new
|
|
||||||
* parent
|
|
||||||
*/
|
|
||||||
tmp = of_get_property(newpar, "#interrupt-cells", NULL);
|
|
||||||
if (tmp == NULL) {
|
|
||||||
DBG(" -> parent lacks #interrupt-cells !\n");
|
|
||||||
goto fail;
|
|
||||||
}
|
|
||||||
newintsize = *tmp;
|
|
||||||
tmp = of_get_property(newpar, "#address-cells", NULL);
|
|
||||||
newaddrsize = (tmp == NULL) ? 0 : *tmp;
|
|
||||||
|
|
||||||
DBG(" -> newintsize=%d, newaddrsize=%d\n",
|
|
||||||
newintsize, newaddrsize);
|
|
||||||
|
|
||||||
/* Check for malformed properties */
|
|
||||||
if (imaplen < (newaddrsize + newintsize))
|
|
||||||
goto fail;
|
|
||||||
|
|
||||||
imap += newaddrsize + newintsize;
|
|
||||||
imaplen -= newaddrsize + newintsize;
|
|
||||||
|
|
||||||
DBG(" -> imaplen=%d\n", imaplen);
|
|
||||||
}
|
|
||||||
if (!match)
|
|
||||||
goto fail;
|
|
||||||
|
|
||||||
of_node_put(old);
|
|
||||||
old = of_node_get(newpar);
|
|
||||||
addrsize = newaddrsize;
|
|
||||||
intsize = newintsize;
|
|
||||||
intspec = imap - intsize;
|
|
||||||
addr = intspec - addrsize;
|
|
||||||
|
|
||||||
skiplevel:
|
|
||||||
/* Iterate again with new parent */
|
|
||||||
DBG(" -> new parent: %s\n", newpar ? newpar->full_name : "<>");
|
|
||||||
of_node_put(ipar);
|
|
||||||
ipar = newpar;
|
|
||||||
newpar = NULL;
|
|
||||||
}
|
|
||||||
fail:
|
|
||||||
of_node_put(ipar);
|
|
||||||
of_node_put(old);
|
|
||||||
of_node_put(newpar);
|
|
||||||
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL_GPL(of_irq_map_raw);
|
|
||||||
|
|
||||||
int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq)
|
|
||||||
{
|
|
||||||
struct device_node *p;
|
|
||||||
const u32 *intspec, *tmp, *addr;
|
|
||||||
u32 intsize, intlen;
|
|
||||||
int res = -EINVAL;
|
|
||||||
|
|
||||||
DBG("of_irq_map_one: dev=%s, index=%d\n", device->full_name, index);
|
|
||||||
|
|
||||||
/* OldWorld mac stuff is "special", handle out of line */
|
|
||||||
if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
|
|
||||||
return of_irq_map_oldworld(device, index, out_irq);
|
|
||||||
|
|
||||||
/* Get the interrupts property */
|
|
||||||
intspec = of_get_property(device, "interrupts", &intlen);
|
|
||||||
if (intspec == NULL)
|
|
||||||
return -EINVAL;
|
|
||||||
intlen /= sizeof(u32);
|
|
||||||
|
|
||||||
/* Get the reg property (if any) */
|
|
||||||
addr = of_get_property(device, "reg", NULL);
|
|
||||||
|
|
||||||
/* Look for the interrupt parent. */
|
|
||||||
p = of_irq_find_parent(device);
|
|
||||||
if (p == NULL)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
/* Get size of interrupt specifier */
|
|
||||||
tmp = of_get_property(p, "#interrupt-cells", NULL);
|
|
||||||
if (tmp == NULL)
|
|
||||||
goto out;
|
|
||||||
intsize = *tmp;
|
|
||||||
|
|
||||||
DBG(" intsize=%d intlen=%d\n", intsize, intlen);
|
|
||||||
|
|
||||||
/* Check index */
|
|
||||||
if ((index + 1) * intsize > intlen)
|
|
||||||
goto out;
|
|
||||||
|
|
||||||
/* Get new specifier and map it */
|
|
||||||
res = of_irq_map_raw(p, intspec + index * intsize, intsize,
|
|
||||||
addr, out_irq);
|
|
||||||
out:
|
|
||||||
of_node_put(p);
|
|
||||||
return res;
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL_GPL(of_irq_map_one);
|
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* Search the device tree for the best MAC address to use. 'mac-address' is
|
* Search the device tree for the best MAC address to use. 'mac-address' is
|
||||||
* checked first, because that is supposed to contain to "most recent" MAC
|
* checked first, because that is supposed to contain to "most recent" MAC
|
||||||
|
|
@ -967,21 +716,6 @@ const void *of_get_mac_address(struct device_node *np)
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL(of_get_mac_address);
|
EXPORT_SYMBOL(of_get_mac_address);
|
||||||
|
|
||||||
int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
|
|
||||||
{
|
|
||||||
int irq = irq_of_parse_and_map(dev, index);
|
|
||||||
|
|
||||||
/* Only dereference the resource if both the
|
|
||||||
* resource and the irq are valid. */
|
|
||||||
if (r && irq != NO_IRQ) {
|
|
||||||
r->start = r->end = irq;
|
|
||||||
r->flags = IORESOURCE_IRQ;
|
|
||||||
}
|
|
||||||
|
|
||||||
return irq;
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL_GPL(of_irq_to_resource);
|
|
||||||
|
|
||||||
void __iomem *of_iomap(struct device_node *np, int index)
|
void __iomem *of_iomap(struct device_node *np, int index)
|
||||||
{
|
{
|
||||||
struct resource res;
|
struct resource res;
|
||||||
|
|
|
||||||
301
drivers/of/irq.c
301
drivers/of/irq.c
|
|
@ -43,3 +43,304 @@ unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
|
||||||
oirq.size);
|
oirq.size);
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
|
EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* of_irq_find_parent - Given a device node, find its interrupt parent node
|
||||||
|
* @child: pointer to device node
|
||||||
|
*
|
||||||
|
* Returns a pointer to the interrupt parent node, or NULL if the interrupt
|
||||||
|
* parent could not be determined.
|
||||||
|
*/
|
||||||
|
static struct device_node *of_irq_find_parent(struct device_node *child)
|
||||||
|
{
|
||||||
|
struct device_node *p;
|
||||||
|
const phandle *parp;
|
||||||
|
|
||||||
|
if (!of_node_get(child))
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
do {
|
||||||
|
parp = of_get_property(child, "interrupt-parent", NULL);
|
||||||
|
if (parp == NULL)
|
||||||
|
p = of_get_parent(child);
|
||||||
|
else {
|
||||||
|
if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
|
||||||
|
p = of_node_get(of_irq_dflt_pic);
|
||||||
|
else
|
||||||
|
p = of_find_node_by_phandle(*parp);
|
||||||
|
}
|
||||||
|
of_node_put(child);
|
||||||
|
child = p;
|
||||||
|
} while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
|
||||||
|
|
||||||
|
return p;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* of_irq_map_raw - Low level interrupt tree parsing
|
||||||
|
* @parent: the device interrupt parent
|
||||||
|
* @intspec: interrupt specifier ("interrupts" property of the device)
|
||||||
|
* @ointsize: size of the passed in interrupt specifier
|
||||||
|
* @addr: address specifier (start of "reg" property of the device)
|
||||||
|
* @out_irq: structure of_irq filled by this function
|
||||||
|
*
|
||||||
|
* Returns 0 on success and a negative number on error
|
||||||
|
*
|
||||||
|
* This function is a low-level interrupt tree walking function. It
|
||||||
|
* can be used to do a partial walk with synthetized reg and interrupts
|
||||||
|
* properties, for example when resolving PCI interrupts when no device
|
||||||
|
* node exist for the parent.
|
||||||
|
*/
|
||||||
|
int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
|
||||||
|
const u32 *addr, struct of_irq *out_irq)
|
||||||
|
{
|
||||||
|
struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
|
||||||
|
const u32 *tmp, *imap, *imask;
|
||||||
|
u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
|
||||||
|
int imaplen, match, i;
|
||||||
|
|
||||||
|
pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],ointsize=%d\n",
|
||||||
|
parent->full_name, intspec[0], intspec[1], ointsize);
|
||||||
|
|
||||||
|
ipar = of_node_get(parent);
|
||||||
|
|
||||||
|
/* First get the #interrupt-cells property of the current cursor
|
||||||
|
* that tells us how to interpret the passed-in intspec. If there
|
||||||
|
* is none, we are nice and just walk up the tree
|
||||||
|
*/
|
||||||
|
do {
|
||||||
|
tmp = of_get_property(ipar, "#interrupt-cells", NULL);
|
||||||
|
if (tmp != NULL) {
|
||||||
|
intsize = *tmp;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
tnode = ipar;
|
||||||
|
ipar = of_irq_find_parent(ipar);
|
||||||
|
of_node_put(tnode);
|
||||||
|
} while (ipar);
|
||||||
|
if (ipar == NULL) {
|
||||||
|
pr_debug(" -> no parent found !\n");
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
|
||||||
|
pr_debug("of_irq_map_raw: ipar=%s, size=%d\n", ipar->full_name, intsize);
|
||||||
|
|
||||||
|
if (ointsize != intsize)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
/* Look for this #address-cells. We have to implement the old linux
|
||||||
|
* trick of looking for the parent here as some device-trees rely on it
|
||||||
|
*/
|
||||||
|
old = of_node_get(ipar);
|
||||||
|
do {
|
||||||
|
tmp = of_get_property(old, "#address-cells", NULL);
|
||||||
|
tnode = of_get_parent(old);
|
||||||
|
of_node_put(old);
|
||||||
|
old = tnode;
|
||||||
|
} while (old && tmp == NULL);
|
||||||
|
of_node_put(old);
|
||||||
|
old = NULL;
|
||||||
|
addrsize = (tmp == NULL) ? 2 : *tmp;
|
||||||
|
|
||||||
|
pr_debug(" -> addrsize=%d\n", addrsize);
|
||||||
|
|
||||||
|
/* Now start the actual "proper" walk of the interrupt tree */
|
||||||
|
while (ipar != NULL) {
|
||||||
|
/* Now check if cursor is an interrupt-controller and if it is
|
||||||
|
* then we are done
|
||||||
|
*/
|
||||||
|
if (of_get_property(ipar, "interrupt-controller", NULL) !=
|
||||||
|
NULL) {
|
||||||
|
pr_debug(" -> got it !\n");
|
||||||
|
memcpy(out_irq->specifier, intspec,
|
||||||
|
intsize * sizeof(u32));
|
||||||
|
out_irq->size = intsize;
|
||||||
|
out_irq->controller = ipar;
|
||||||
|
of_node_put(old);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Now look for an interrupt-map */
|
||||||
|
imap = of_get_property(ipar, "interrupt-map", &imaplen);
|
||||||
|
/* No interrupt map, check for an interrupt parent */
|
||||||
|
if (imap == NULL) {
|
||||||
|
pr_debug(" -> no map, getting parent\n");
|
||||||
|
newpar = of_irq_find_parent(ipar);
|
||||||
|
goto skiplevel;
|
||||||
|
}
|
||||||
|
imaplen /= sizeof(u32);
|
||||||
|
|
||||||
|
/* Look for a mask */
|
||||||
|
imask = of_get_property(ipar, "interrupt-map-mask", NULL);
|
||||||
|
|
||||||
|
/* If we were passed no "reg" property and we attempt to parse
|
||||||
|
* an interrupt-map, then #address-cells must be 0.
|
||||||
|
* Fail if it's not.
|
||||||
|
*/
|
||||||
|
if (addr == NULL && addrsize != 0) {
|
||||||
|
pr_debug(" -> no reg passed in when needed !\n");
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Parse interrupt-map */
|
||||||
|
match = 0;
|
||||||
|
while (imaplen > (addrsize + intsize + 1) && !match) {
|
||||||
|
/* Compare specifiers */
|
||||||
|
match = 1;
|
||||||
|
for (i = 0; i < addrsize && match; ++i) {
|
||||||
|
u32 mask = imask ? imask[i] : 0xffffffffu;
|
||||||
|
match = ((addr[i] ^ imap[i]) & mask) == 0;
|
||||||
|
}
|
||||||
|
for (; i < (addrsize + intsize) && match; ++i) {
|
||||||
|
u32 mask = imask ? imask[i] : 0xffffffffu;
|
||||||
|
match =
|
||||||
|
((intspec[i-addrsize] ^ imap[i]) & mask) == 0;
|
||||||
|
}
|
||||||
|
imap += addrsize + intsize;
|
||||||
|
imaplen -= addrsize + intsize;
|
||||||
|
|
||||||
|
pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen);
|
||||||
|
|
||||||
|
/* Get the interrupt parent */
|
||||||
|
if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
|
||||||
|
newpar = of_node_get(of_irq_dflt_pic);
|
||||||
|
else
|
||||||
|
newpar = of_find_node_by_phandle((phandle)*imap);
|
||||||
|
imap++;
|
||||||
|
--imaplen;
|
||||||
|
|
||||||
|
/* Check if not found */
|
||||||
|
if (newpar == NULL) {
|
||||||
|
pr_debug(" -> imap parent not found !\n");
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Get #interrupt-cells and #address-cells of new
|
||||||
|
* parent
|
||||||
|
*/
|
||||||
|
tmp = of_get_property(newpar, "#interrupt-cells", NULL);
|
||||||
|
if (tmp == NULL) {
|
||||||
|
pr_debug(" -> parent lacks #interrupt-cells!\n");
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
newintsize = *tmp;
|
||||||
|
tmp = of_get_property(newpar, "#address-cells", NULL);
|
||||||
|
newaddrsize = (tmp == NULL) ? 0 : *tmp;
|
||||||
|
|
||||||
|
pr_debug(" -> newintsize=%d, newaddrsize=%d\n",
|
||||||
|
newintsize, newaddrsize);
|
||||||
|
|
||||||
|
/* Check for malformed properties */
|
||||||
|
if (imaplen < (newaddrsize + newintsize))
|
||||||
|
goto fail;
|
||||||
|
|
||||||
|
imap += newaddrsize + newintsize;
|
||||||
|
imaplen -= newaddrsize + newintsize;
|
||||||
|
|
||||||
|
pr_debug(" -> imaplen=%d\n", imaplen);
|
||||||
|
}
|
||||||
|
if (!match)
|
||||||
|
goto fail;
|
||||||
|
|
||||||
|
of_node_put(old);
|
||||||
|
old = of_node_get(newpar);
|
||||||
|
addrsize = newaddrsize;
|
||||||
|
intsize = newintsize;
|
||||||
|
intspec = imap - intsize;
|
||||||
|
addr = intspec - addrsize;
|
||||||
|
|
||||||
|
skiplevel:
|
||||||
|
/* Iterate again with new parent */
|
||||||
|
pr_debug(" -> new parent: %s\n", newpar ? newpar->full_name : "<>");
|
||||||
|
of_node_put(ipar);
|
||||||
|
ipar = newpar;
|
||||||
|
newpar = NULL;
|
||||||
|
}
|
||||||
|
fail:
|
||||||
|
of_node_put(ipar);
|
||||||
|
of_node_put(old);
|
||||||
|
of_node_put(newpar);
|
||||||
|
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(of_irq_map_raw);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* of_irq_map_one - Resolve an interrupt for a device
|
||||||
|
* @device: the device whose interrupt is to be resolved
|
||||||
|
* @index: index of the interrupt to resolve
|
||||||
|
* @out_irq: structure of_irq filled by this function
|
||||||
|
*
|
||||||
|
* This function resolves an interrupt, walking the tree, for a given
|
||||||
|
* device-tree node. It's the high level pendant to of_irq_map_raw().
|
||||||
|
*/
|
||||||
|
int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq)
|
||||||
|
{
|
||||||
|
struct device_node *p;
|
||||||
|
const u32 *intspec, *tmp, *addr;
|
||||||
|
u32 intsize, intlen;
|
||||||
|
int res = -EINVAL;
|
||||||
|
|
||||||
|
pr_debug("of_irq_map_one: dev=%s, index=%d\n", device->full_name, index);
|
||||||
|
|
||||||
|
/* OldWorld mac stuff is "special", handle out of line */
|
||||||
|
if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
|
||||||
|
return of_irq_map_oldworld(device, index, out_irq);
|
||||||
|
|
||||||
|
/* Get the interrupts property */
|
||||||
|
intspec = of_get_property(device, "interrupts", &intlen);
|
||||||
|
if (intspec == NULL)
|
||||||
|
return -EINVAL;
|
||||||
|
intlen /= sizeof(u32);
|
||||||
|
|
||||||
|
pr_debug(" intspec=%d intlen=%d\n", *intspec, intlen);
|
||||||
|
|
||||||
|
/* Get the reg property (if any) */
|
||||||
|
addr = of_get_property(device, "reg", NULL);
|
||||||
|
|
||||||
|
/* Look for the interrupt parent. */
|
||||||
|
p = of_irq_find_parent(device);
|
||||||
|
if (p == NULL)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
/* Get size of interrupt specifier */
|
||||||
|
tmp = of_get_property(p, "#interrupt-cells", NULL);
|
||||||
|
if (tmp == NULL)
|
||||||
|
goto out;
|
||||||
|
intsize = *tmp;
|
||||||
|
|
||||||
|
pr_debug(" intsize=%d intlen=%d\n", intsize, intlen);
|
||||||
|
|
||||||
|
/* Check index */
|
||||||
|
if ((index + 1) * intsize > intlen)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
/* Get new specifier and map it */
|
||||||
|
res = of_irq_map_raw(p, intspec + index * intsize, intsize,
|
||||||
|
addr, out_irq);
|
||||||
|
out:
|
||||||
|
of_node_put(p);
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(of_irq_map_one);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* of_irq_to_resource - Decode a node's IRQ and return it as a resource
|
||||||
|
* @dev: pointer to device tree node
|
||||||
|
* @index: zero-based index of the irq
|
||||||
|
* @r: pointer to resource structure to return result into.
|
||||||
|
*/
|
||||||
|
int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
|
||||||
|
{
|
||||||
|
int irq = irq_of_parse_and_map(dev, index);
|
||||||
|
|
||||||
|
/* Only dereference the resource if both the
|
||||||
|
* resource and the irq are valid. */
|
||||||
|
if (r && irq != NO_IRQ) {
|
||||||
|
r->start = r->end = irq;
|
||||||
|
r->flags = IORESOURCE_IRQ;
|
||||||
|
}
|
||||||
|
|
||||||
|
return irq;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(of_irq_to_resource);
|
||||||
|
|
|
||||||
|
|
@ -4,6 +4,8 @@
|
||||||
#if defined(CONFIG_OF)
|
#if defined(CONFIG_OF)
|
||||||
struct of_irq;
|
struct of_irq;
|
||||||
#include <linux/types.h>
|
#include <linux/types.h>
|
||||||
|
#include <linux/errno.h>
|
||||||
|
#include <linux/ioport.h>
|
||||||
#include <linux/of.h>
|
#include <linux/of.h>
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
|
@ -30,11 +32,38 @@ struct of_irq {
|
||||||
u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
|
u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
|
||||||
};
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Workarounds only applied to 32bit powermac machines
|
||||||
|
*/
|
||||||
|
#define OF_IMAP_OLDWORLD_MAC 0x00000001
|
||||||
|
#define OF_IMAP_NO_PHANDLE 0x00000002
|
||||||
|
|
||||||
|
#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
|
||||||
|
extern unsigned int of_irq_workarounds;
|
||||||
|
extern struct device_node *of_irq_dflt_pic;
|
||||||
|
extern int of_irq_map_oldworld(struct device_node *device, int index,
|
||||||
|
struct of_irq *out_irq);
|
||||||
|
#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
|
||||||
|
#define of_irq_workarounds (0)
|
||||||
|
#define of_irq_dflt_pic (NULL)
|
||||||
|
static inline int of_irq_map_oldworld(struct device_node *device, int index,
|
||||||
|
struct of_irq *out_irq)
|
||||||
|
{
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
|
||||||
|
|
||||||
|
|
||||||
|
extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
|
||||||
|
u32 ointsize, const u32 *addr,
|
||||||
|
struct of_irq *out_irq);
|
||||||
extern int of_irq_map_one(struct device_node *device, int index,
|
extern int of_irq_map_one(struct device_node *device, int index,
|
||||||
struct of_irq *out_irq);
|
struct of_irq *out_irq);
|
||||||
extern unsigned int irq_create_of_mapping(struct device_node *controller,
|
extern unsigned int irq_create_of_mapping(struct device_node *controller,
|
||||||
const u32 *intspec,
|
const u32 *intspec,
|
||||||
unsigned int intsize);
|
unsigned int intsize);
|
||||||
|
extern int of_irq_to_resource(struct device_node *dev, int index,
|
||||||
|
struct resource *r);
|
||||||
|
|
||||||
#endif /* CONFIG_OF_IRQ */
|
#endif /* CONFIG_OF_IRQ */
|
||||||
#endif /* CONFIG_OF */
|
#endif /* CONFIG_OF */
|
||||||
|
|
|
||||||
Loading…
Add table
Reference in a new issue