#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/msi.h>
-#include <linux/reboot.h>
+#include <linux/of_platform.h>
#include <asm/dcr.h>
#include <asm/machdep.h>
struct axon_msic {
- struct device_node *dn;
struct irq_host *irq_host;
- __le32 *fifo;
+ __le32 *fifo_virt;
+ dma_addr_t fifo_phys;
dcr_host_t dcr_host;
- struct list_head list;
u32 read_offset;
- u32 dcr_base;
};
-static LIST_HEAD(axon_msic_list);
-
static void msic_dcr_write(struct axon_msic *msic, unsigned int dcr_n, u32 val)
{
pr_debug("axon_msi: dcr_write(0x%x, 0x%x)\n", val, dcr_n);
- dcr_write(msic->dcr_host, msic->dcr_base + dcr_n, val);
-}
-
-static u32 msic_dcr_read(struct axon_msic *msic, unsigned int dcr_n)
-{
- return dcr_read(msic->dcr_host, msic->dcr_base + dcr_n);
+ dcr_write(msic->dcr_host, dcr_n, val);
}
static void axon_msi_cascade(unsigned int irq, struct irq_desc *desc)
u32 write_offset, msi;
int idx;
- write_offset = msic_dcr_read(msic, MSIC_WRITE_OFFSET_REG);
+ write_offset = dcr_read(msic->dcr_host, MSIC_WRITE_OFFSET_REG);
pr_debug("axon_msi: original write_offset 0x%x\n", write_offset);
/* write_offset doesn't wrap properly, so we have to mask it */
while (msic->read_offset != write_offset) {
idx = msic->read_offset / sizeof(__le32);
- msi = le32_to_cpu(msic->fifo[idx]);
+ msi = le32_to_cpu(msic->fifo_virt[idx]);
msi &= 0xFFFF;
pr_debug("axon_msi: woff %x roff %x msi %x\n",
const phandle *ph;
struct axon_msic *msic = NULL;
- dn = pci_device_to_OF_node(dev);
+ dn = of_node_get(pci_device_to_OF_node(dev));
if (!dn) {
dev_dbg(&dev->dev, "axon_msi: no pci_dn found\n");
return NULL;
tmp = dn;
dn = of_find_node_by_phandle(*ph);
+ of_node_put(tmp);
if (!dn) {
dev_dbg(&dev->dev,
"axon_msi: msi-translator doesn't point to a node\n");
out_error:
of_node_put(dn);
- of_node_put(tmp);
return msic;
}
int len;
const u32 *prop;
- dn = pci_device_to_OF_node(dev);
+ dn = of_node_get(pci_device_to_OF_node(dev));
if (!dn) {
dev_dbg(&dev->dev, "axon_msi: no pci_dn found\n");
return -ENODEV;
return 0;
}
-static int msic_host_match(struct irq_host *host, struct device_node *dn)
-{
- struct axon_msic *msic = host->host_data;
-
- return msic->dn == dn;
-}
-
static struct irq_host_ops msic_host_ops = {
- .match = msic_host_match,
.map = msic_host_map,
};
-static int axon_msi_notify_reboot(struct notifier_block *nb,
- unsigned long code, void *data)
+static int axon_msi_shutdown(struct of_device *device)
{
- struct axon_msic *msic;
+ struct axon_msic *msic = device->dev.platform_data;
u32 tmp;
- list_for_each_entry(msic, &axon_msic_list, list) {
- pr_debug("axon_msi: disabling %s\n", msic->dn->full_name);
- tmp = msic_dcr_read(msic, MSIC_CTRL_REG);
- tmp &= ~MSIC_CTRL_ENABLE & ~MSIC_CTRL_IRQ_ENABLE;
- msic_dcr_write(msic, MSIC_CTRL_REG, tmp);
- }
+ pr_debug("axon_msi: disabling %s\n",
+ msic->irq_host->of_node->full_name);
+ tmp = dcr_read(msic->dcr_host, MSIC_CTRL_REG);
+ tmp &= ~MSIC_CTRL_ENABLE & ~MSIC_CTRL_IRQ_ENABLE;
+ msic_dcr_write(msic, MSIC_CTRL_REG, tmp);
return 0;
}
-static struct notifier_block axon_msi_reboot_notifier = {
- .notifier_call = axon_msi_notify_reboot
-};
-
-static int axon_msi_setup_one(struct device_node *dn)
+static int axon_msi_probe(struct of_device *device,
+ const struct of_device_id *device_id)
{
- struct page *page;
+ struct device_node *dn = device->node;
struct axon_msic *msic;
unsigned int virq;
- int dcr_len;
+ int dcr_base, dcr_len;
pr_debug("axon_msi: setting up dn %s\n", dn->full_name);
goto out;
}
- msic->dcr_base = dcr_resource_start(dn, 0);
+ dcr_base = dcr_resource_start(dn, 0);
dcr_len = dcr_resource_len(dn, 0);
- if (msic->dcr_base == 0 || dcr_len == 0) {
+ if (dcr_base == 0 || dcr_len == 0) {
printk(KERN_ERR
"axon_msi: couldn't parse dcr properties on %s\n",
dn->full_name);
goto out;
}
- msic->dcr_host = dcr_map(dn, msic->dcr_base, dcr_len);
+ msic->dcr_host = dcr_map(dn, dcr_base, dcr_len);
if (!DCR_MAP_OK(msic->dcr_host)) {
printk(KERN_ERR "axon_msi: dcr_map failed for %s\n",
dn->full_name);
goto out_free_msic;
}
- page = alloc_pages_node(of_node_to_nid(dn), GFP_KERNEL,
- get_order(MSIC_FIFO_SIZE_BYTES));
- if (!page) {
+ msic->fifo_virt = dma_alloc_coherent(&device->dev, MSIC_FIFO_SIZE_BYTES,
+ &msic->fifo_phys, GFP_KERNEL);
+ if (!msic->fifo_virt) {
printk(KERN_ERR "axon_msi: couldn't allocate fifo for %s\n",
dn->full_name);
goto out_free_msic;
}
- msic->fifo = page_address(page);
-
- msic->irq_host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, NR_IRQS,
- &msic_host_ops, 0);
+ msic->irq_host = irq_alloc_host(of_node_get(dn), IRQ_HOST_MAP_NOMAP,
+ NR_IRQS, &msic_host_ops, 0);
if (!msic->irq_host) {
printk(KERN_ERR "axon_msi: couldn't allocate irq_host for %s\n",
dn->full_name);
goto out_free_host;
}
- msic->dn = of_node_get(dn);
-
set_irq_data(virq, msic);
set_irq_chained_handler(virq, axon_msi_cascade);
pr_debug("axon_msi: irq 0x%x setup for axon_msi\n", virq);
/* Enable the MSIC hardware */
- msic_dcr_write(msic, MSIC_BASE_ADDR_HI_REG, (u64)msic->fifo >> 32);
+ msic_dcr_write(msic, MSIC_BASE_ADDR_HI_REG, msic->fifo_phys >> 32);
msic_dcr_write(msic, MSIC_BASE_ADDR_LO_REG,
- (u64)msic->fifo & 0xFFFFFFFF);
+ msic->fifo_phys & 0xFFFFFFFF);
msic_dcr_write(msic, MSIC_CTRL_REG,
MSIC_CTRL_IRQ_ENABLE | MSIC_CTRL_ENABLE |
MSIC_CTRL_FIFO_SIZE);
- list_add(&msic->list, &axon_msic_list);
+ device->dev.platform_data = msic;
+
+ ppc_md.setup_msi_irqs = axon_msi_setup_msi_irqs;
+ ppc_md.teardown_msi_irqs = axon_msi_teardown_msi_irqs;
+ ppc_md.msi_check_device = axon_msi_check_device;
printk(KERN_DEBUG "axon_msi: setup MSIC on %s\n", dn->full_name);
out_free_host:
kfree(msic->irq_host);
out_free_fifo:
- __free_pages(virt_to_page(msic->fifo), get_order(MSIC_FIFO_SIZE_BYTES));
+ dma_free_coherent(&device->dev, MSIC_FIFO_SIZE_BYTES, msic->fifo_virt,
+ msic->fifo_phys);
out_free_msic:
kfree(msic);
out:
return -1;
}
-static int axon_msi_init(void)
-{
- struct device_node *dn;
- int found = 0;
-
- pr_debug("axon_msi: initialising ...\n");
-
- for_each_compatible_node(dn, NULL, "ibm,axon-msic") {
- if (axon_msi_setup_one(dn) == 0)
- found++;
- }
-
- if (found) {
- ppc_md.setup_msi_irqs = axon_msi_setup_msi_irqs;
- ppc_md.teardown_msi_irqs = axon_msi_teardown_msi_irqs;
- ppc_md.msi_check_device = axon_msi_check_device;
-
- register_reboot_notifier(&axon_msi_reboot_notifier);
+static const struct of_device_id axon_msi_device_id[] = {
+ {
+ .compatible = "ibm,axon-msic"
+ },
+ {}
+};
- pr_debug("axon_msi: registered callbacks!\n");
- }
+static struct of_platform_driver axon_msi_driver = {
+ .match_table = axon_msi_device_id,
+ .probe = axon_msi_probe,
+ .shutdown = axon_msi_shutdown,
+ .driver = {
+ .name = "axon-msi"
+ },
+};
- return 0;
+static int __init axon_msi_init(void)
+{
+ return of_register_platform_driver(&axon_msi_driver);
}
-arch_initcall(axon_msi_init);
+subsys_initcall(axon_msi_init);
projects / linux-2.6-omap-h63xx.git / blobdiff