#include <linux/interrupt.h>
#include <linux/irq.h>
-#include <linux/ioport.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
REISWAITEN = 0x508, /* Reissue Wait Control*/
};
-#define SPIDER_CHIP_COUNT 4
-#define SPIDER_SRC_COUNT 64
-#define SPIDER_IRQ_INVALID 63
+static void __iomem *spider_pics[4];
-struct spider_pic {
- struct irq_host *host;
- struct device_node *of_node;
- void __iomem *regs;
- unsigned int node_id;
-};
-static struct spider_pic spider_pics[SPIDER_CHIP_COUNT];
-
-static struct spider_pic *spider_virq_to_pic(unsigned int virq)
+static void __iomem *spider_get_pic(int irq)
{
- return irq_map[virq].host->host_data;
+ int node = irq / IIC_NODE_STRIDE;
+ irq %= IIC_NODE_STRIDE;
+
+ if (irq >= IIC_EXT_OFFSET &&
+ irq < IIC_EXT_OFFSET + IIC_NUM_EXT &&
+ spider_pics)
+ return spider_pics[node];
+ return NULL;
}
-static void __iomem *spider_get_irq_config(struct spider_pic *pic,
- unsigned int src)
+static int spider_get_nr(unsigned int irq)
{
- return pic->regs + TIR_CFGA + 8 * src;
+ return (irq % IIC_NODE_STRIDE) - IIC_EXT_OFFSET;
}
-static void spider_unmask_irq(unsigned int virq)
+static void __iomem *spider_get_irq_config(int irq)
{
- struct spider_pic *pic = spider_virq_to_pic(virq);
- void __iomem *cfg = spider_get_irq_config(pic, irq_map[virq].hwirq);
-
- out_be32(cfg, in_be32(cfg) | 0x30000000u);
+ void __iomem *pic;
+ pic = spider_get_pic(irq);
+ return pic + TIR_CFGA + 8 * spider_get_nr(irq);
}
-static void spider_mask_irq(unsigned int virq)
+static void spider_enable_irq(unsigned int irq)
{
- struct spider_pic *pic = spider_virq_to_pic(virq);
- void __iomem *cfg = spider_get_irq_config(pic, irq_map[virq].hwirq);
+ void __iomem *cfg = spider_get_irq_config(irq);
+ irq = spider_get_nr(irq);
- out_be32(cfg, in_be32(cfg) & ~0x30000000u);
+ out_be32(cfg, in_be32(cfg) | 0x3107000eu);
+ out_be32(cfg + 4, in_be32(cfg + 4) | 0x00020000u | irq);
}
-static void spider_ack_irq(unsigned int virq)
+static void spider_disable_irq(unsigned int irq)
{
- struct spider_pic *pic = spider_virq_to_pic(virq);
- unsigned int src = irq_map[virq].hwirq;
-
- /* Reset edge detection logic if necessary
- */
- if (get_irq_desc(virq)->status & IRQ_LEVEL)
- return;
-
- /* Only interrupts 47 to 50 can be set to edge */
- if (src < 47 || src > 50)
- return;
+ void __iomem *cfg = spider_get_irq_config(irq);
+ irq = spider_get_nr(irq);
- /* Perform the clear of the edge logic */
- out_be32(pic->regs + TIR_EDC, 0x100 | (src & 0xf));
+ out_be32(cfg, in_be32(cfg) & ~0x30000000u);
}
-static int spider_set_irq_type(unsigned int virq, unsigned int type)
+static unsigned int spider_startup_irq(unsigned int irq)
{
- unsigned int sense = type & IRQ_TYPE_SENSE_MASK;
- struct spider_pic *pic = spider_virq_to_pic(virq);
- unsigned int hw = irq_map[virq].hwirq;
- void __iomem *cfg = spider_get_irq_config(pic, hw);
- struct irq_desc *desc = get_irq_desc(virq);
- u32 old_mask;
- u32 ic;
-
- /* Note that only level high is supported for most interrupts */
- if (sense != IRQ_TYPE_NONE && sense != IRQ_TYPE_LEVEL_HIGH &&
- (hw < 47 || hw > 50))
- return -EINVAL;
-
- /* Decode sense type */
- switch(sense) {
- case IRQ_TYPE_EDGE_RISING:
- ic = 0x3;
- break;
- case IRQ_TYPE_EDGE_FALLING:
- ic = 0x2;
- break;
- case IRQ_TYPE_LEVEL_LOW:
- ic = 0x0;
- break;
- case IRQ_TYPE_LEVEL_HIGH:
- case IRQ_TYPE_NONE:
- ic = 0x1;
- break;
- default:
- return -EINVAL;
- }
-
- /* Update irq_desc */
- desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
- desc->status |= type & IRQ_TYPE_SENSE_MASK;
- if (type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
- desc->status |= IRQ_LEVEL;
-
- /* Configure the source. One gross hack that was there before and
- * that I've kept around is the priority to the BE which I set to
- * be the same as the interrupt source number. I don't know wether
- * that's supposed to make any kind of sense however, we'll have to
- * decide that, but for now, I'm not changing the behaviour.
- */
- old_mask = in_be32(cfg) & 0x30000000u;
- out_be32(cfg, old_mask | (ic << 24) | (0x7 << 16) |
- (pic->node_id << 4) | 0xe);
- out_be32(cfg + 4, (0x2 << 16) | (hw & 0xff));
-
+ spider_enable_irq(irq);
return 0;
}
-static struct irq_chip spider_pic = {
- .typename = " SPIDER ",
- .unmask = spider_unmask_irq,
- .mask = spider_mask_irq,
- .ack = spider_ack_irq,
- .set_type = spider_set_irq_type,
-};
-
-static int spider_host_match(struct irq_host *h, struct device_node *node)
+static void spider_shutdown_irq(unsigned int irq)
{
- struct spider_pic *pic = h->host_data;
- return node == pic->of_node;
+ spider_disable_irq(irq);
}
-static int spider_host_map(struct irq_host *h, unsigned int virq,
- irq_hw_number_t hw)
+static void spider_end_irq(unsigned int irq)
{
- set_irq_chip_and_handler(virq, &spider_pic, handle_level_irq);
-
- /* Set default irq type */
- set_irq_type(virq, IRQ_TYPE_NONE);
-
- return 0;
+ spider_enable_irq(irq);
}
-static int spider_host_xlate(struct irq_host *h, struct device_node *ct,
- u32 *intspec, unsigned int intsize,
- irq_hw_number_t *out_hwirq, unsigned int *out_flags)
-
+static void spider_ack_irq(unsigned int irq)
{
- /* Spider interrupts have 2 cells, first is the interrupt source,
- * second, well, I don't know for sure yet ... We mask the top bits
- * because old device-trees encode a node number in there
- */
- *out_hwirq = intspec[0] & 0x3f;
- *out_flags = IRQ_TYPE_LEVEL_HIGH;
- return 0;
+ spider_disable_irq(irq);
+ iic_local_enable();
}
-static struct irq_host_ops spider_host_ops = {
- .match = spider_host_match,
- .map = spider_host_map,
- .xlate = spider_host_xlate,
+static struct hw_interrupt_type spider_pic = {
+ .typename = " SPIDER ",
+ .startup = spider_startup_irq,
+ .shutdown = spider_shutdown_irq,
+ .enable = spider_enable_irq,
+ .disable = spider_disable_irq,
+ .ack = spider_ack_irq,
+ .end = spider_end_irq,
};
-static void spider_irq_cascade(unsigned int irq, struct irq_desc *desc,
- struct pt_regs *regs)
-{
- struct spider_pic *pic = desc->handler_data;
- unsigned int cs, virq;
-
- cs = in_be32(pic->regs + TIR_CS) >> 24;
- if (cs == SPIDER_IRQ_INVALID)
- virq = NO_IRQ;
- else
- virq = irq_linear_revmap(pic->host, cs);
- if (virq != NO_IRQ)
- generic_handle_irq(virq, regs);
- desc->chip->eoi(irq);
-}
-/* For hooking up the cascace we have a problem. Our device-tree is
- * crap and we don't know on which BE iic interrupt we are hooked on at
- * least not the "standard" way. We can reconstitute it based on two
- * informations though: which BE node we are connected to and wether
- * we are connected to IOIF0 or IOIF1. Right now, we really only care
- * about the IBM cell blade and we know that its firmware gives us an
- * interrupt-map property which is pretty strange.
- */
-static unsigned int __init spider_find_cascade_and_node(struct spider_pic *pic)
+int spider_get_irq(unsigned long int_pending)
{
- unsigned int virq;
- u32 *imap, *tmp;
- int imaplen, intsize, unit;
- struct device_node *iic;
- struct irq_host *iic_host;
+ void __iomem *regs = spider_get_pic(int_pending);
+ unsigned long cs;
+ int irq;
-#if 0 /* Enable that when we have a way to retreive the node as well */
- /* First, we check wether we have a real "interrupts" in the device
- * tree in case the device-tree is ever fixed
- */
- struct of_irq oirq;
- if (of_irq_map_one(pic->of_node, 0, &oirq) == 0) {
- virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
- oirq.size);
- goto bail;
- }
-#endif
+ cs = in_be32(regs + TIR_CS);
- /* Now do the horrible hacks */
- tmp = (u32 *)get_property(pic->of_node, "#interrupt-cells", NULL);
- if (tmp == NULL)
- return NO_IRQ;
- intsize = *tmp;
- imap = (u32 *)get_property(pic->of_node, "interrupt-map", &imaplen);
- if (imap == NULL || imaplen < (intsize + 1))
- return NO_IRQ;
- iic = of_find_node_by_phandle(imap[intsize]);
- if (iic == NULL)
- return NO_IRQ;
- imap += intsize + 1;
- tmp = (u32 *)get_property(iic, "#interrupt-cells", NULL);
- if (tmp == NULL)
- return NO_IRQ;
- intsize = *tmp;
- /* Assume unit is last entry of interrupt specifier */
- unit = imap[intsize - 1];
- /* Ok, we have a unit, now let's try to get the node */
- tmp = (u32 *)get_property(iic, "ibm,interrupt-server-ranges", NULL);
- if (tmp == NULL) {
- of_node_put(iic);
- return NO_IRQ;
- }
- /* ugly as hell but works for now */
- pic->node_id = (*tmp) >> 1;
- of_node_put(iic);
+ irq = cs >> 24;
+ if (irq != 63)
+ return irq;
- /* Ok, now let's get cracking. You may ask me why I just didn't match
- * the iic host from the iic OF node, but that way I'm still compatible
- * with really really old old firmwares for which we don't have a node
- */
- iic_host = iic_get_irq_host(pic->node_id);
- if (iic_host == NULL)
- return NO_IRQ;
- /* Manufacture an IIC interrupt number of class 2 */
- virq = irq_create_mapping(iic_host, 0x20 | unit);
- if (virq == NO_IRQ)
- printk(KERN_ERR "spider_pic: failed to map cascade !");
- return virq;
+ return -1;
}
-
-
-static void __init spider_init_one(struct device_node *of_node, int chip,
- unsigned long addr)
+
+void spider_init_IRQ(void)
{
- struct spider_pic *pic = &spider_pics[chip];
- int i, virq;
-
- /* Map registers */
- pic->regs = ioremap(addr, 0x1000);
- if (pic->regs == NULL)
- panic("spider_pic: can't map registers !");
-
- /* Allocate a host */
- pic->host = irq_alloc_host(IRQ_HOST_MAP_LINEAR, SPIDER_SRC_COUNT,
- &spider_host_ops, SPIDER_IRQ_INVALID);
- if (pic->host == NULL)
- panic("spider_pic: can't allocate irq host !");
- pic->host->host_data = pic;
-
- /* Fill out other bits */
- pic->of_node = of_node_get(of_node);
-
- /* Go through all sources and disable them */
- for (i = 0; i < SPIDER_SRC_COUNT; i++) {
- void __iomem *cfg = pic->regs + TIR_CFGA + 8 * i;
- out_be32(cfg, in_be32(cfg) & ~0x30000000u);
- }
-
- /* do not mask any interrupts because of level */
- out_be32(pic->regs + TIR_MSK, 0x0);
-
- /* enable interrupt packets to be output */
- out_be32(pic->regs + TIR_PIEN, in_be32(pic->regs + TIR_PIEN) | 0x1);
-
- /* Hook up the cascade interrupt to the iic and nodeid */
- virq = spider_find_cascade_and_node(pic);
- if (virq == NO_IRQ)
- return;
- set_irq_data(virq, pic);
- set_irq_chained_handler(virq, spider_irq_cascade);
-
- printk(KERN_INFO "spider_pic: node %d, addr: 0x%lx %s\n",
- pic->node_id, addr, of_node->full_name);
-
- /* Enable the interrupt detection enable bit. Do this last! */
- out_be32(pic->regs + TIR_DEN, in_be32(pic->regs + TIR_DEN) | 0x1);
-}
-
-void __init spider_init_IRQ(void)
-{
- struct resource r;
+ int node;
struct device_node *dn;
- int chip = 0;
-
- /* XXX node numbers are totally bogus. We _hope_ we get the device
- * nodes in the right order here but that's definitely not guaranteed,
- * we need to get the node from the device tree instead.
- * There is currently no proper property for it (but our whole
- * device-tree is bogus anyway) so all we can do is pray or maybe test
- * the address and deduce the node-id
- */
- for (dn = NULL;
- (dn = of_find_node_by_name(dn, "interrupt-controller"));) {
- if (device_is_compatible(dn, "CBEA,platform-spider-pic")) {
- if (of_address_to_resource(dn, 0, &r)) {
- printk(KERN_WARNING "spider-pic: Failed\n");
- continue;
- }
- } else if (device_is_compatible(dn, "sti,platform-spider-pic")
- && (chip < 2)) {
- static long hard_coded_pics[] =
- { 0x24000008000, 0x34000008000 };
- r.start = hard_coded_pics[chip];
- } else
+ unsigned int *property;
+ long spiderpic;
+ int n;
+
+/* FIXME: detect multiple PICs as soon as the device tree has them */
+ for (node = 0; node < 1; node++) {
+ dn = of_find_node_by_path("/");
+ n = prom_n_addr_cells(dn);
+ property = (unsigned int *) get_property(dn,
+ "platform-spider-pic", NULL);
+
+ if (!property)
continue;
- spider_init_one(dn, chip++, r.start);
+ for (spiderpic = 0; n > 0; --n)
+ spiderpic = (spiderpic << 32) + *property++;
+ printk(KERN_DEBUG "SPIDER addr: %lx\n", spiderpic);
+ spider_pics[node] = __ioremap(spiderpic, 0x800, _PAGE_NO_CACHE);
+ for (n = 0; n < IIC_NUM_EXT; n++) {
+ int irq = n + IIC_EXT_OFFSET + node * IIC_NODE_STRIDE;
+ get_irq_desc(irq)->handler = &spider_pic;
+
+ /* do not mask any interrupts because of level */
+ out_be32(spider_pics[node] + TIR_MSK, 0x0);
+
+ /* disable edge detection clear */
+ /* out_be32(spider_pics[node] + TIR_EDC, 0x0); */
+
+ /* enable interrupt packets to be output */
+ out_be32(spider_pics[node] + TIR_PIEN,
+ in_be32(spider_pics[node] + TIR_PIEN) | 0x1);
+
+ /* Enable the interrupt detection enable bit. Do this last! */
+ out_be32(spider_pics[node] + TIR_DEN,
+ in_be32(spider_pics[node] +TIR_DEN) | 0x1);
+
+ }
}
}
git://git.onelab.eu / linux-2.6.git / blobdiff