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FPGA Configuration Space
Commit ee1e2292 authored by Piotr Miedzik's avatar Piotr Miedzik Committed by root
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spec_wb: MSI is now optional

parent 279d8071
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Showing with 21 additions and 7 deletions
pcie-wb/spec_wb.c
View file @ ee1e2292
......@@ -28,6 +28,7 @@
#endif
static unsigned int debug = 0;
static unsigned int sdb_addr = 0x100;
static void wb_cycle(struct wishbone* wb, int on)
{
......@@ -157,7 +158,7 @@ static wb_data_t wb_read_cfg(struct wishbone *wb, wb_addr_t addr)
case 0: out = 0; break;
case 4: out = 0; break;
case 8: out = 0; break;
case 12: out = 0x30000; break;
case 12: out = sdb_addr; break;
default: out = 0; break;
}
......@@ -260,6 +261,7 @@ static int probe(struct pci_dev *pdev, const struct pci_device_id *id)
dev->pci_dev = pdev;
dev->wb.wops = &wb_ops;
dev->wb.parent = &pdev->dev;
dev->msi = 1;
mutex_init(&dev->mutex);
dev->window_offset = 0;
dev->low_addr = 0;
......@@ -271,7 +273,12 @@ static int probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (pci_enable_msi(pdev) != 0) {
/* resort to legacy interrupts */
printk(KERN_ALERT SPEC_WB ": could not enable MSI interrupting\n");
goto fail_free;
dev->msi = 0;
}
if (dev->msi) {
/* disable legacy interrupts when using MSI */
pci_intx(pdev, 0);
}
if (setup_bar(pdev, &dev->pci_res[0], 0) < 0) goto fail_msi;
......@@ -292,9 +299,11 @@ fail_bar1:
destroy_bar(&dev->pci_res[1]);
fail_bar0:
destroy_bar(&dev->pci_res[0]);
fail_msi:
pci_disable_msi(pdev);
fail_free:
fail_msi:
if (dev->msi) {
pci_intx(pdev, 1);
pci_disable_msi(pdev);
}
kfree(dev);
fail_out:
return -EIO;
......@@ -314,8 +323,10 @@ static void remove(struct pci_dev *pdev)
destroy_bar(&dev->pci_res[2]);
destroy_bar(&dev->pci_res[1]);
destroy_bar(&dev->pci_res[0]);
pci_disable_msi(pdev);
if (dev->msi) {
pci_intx(pdev, 1);
pci_disable_msi(pdev);
}
kfree(dev);
}
......@@ -348,6 +359,8 @@ MODULE_AUTHOR("Wesley W. Terpstra <w.tersptra@gsi.de>");
MODULE_DESCRIPTION("CERN SPEC card bridge");
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Enable debugging information");
module_param(sdb_addr, int, 0644);
MODULE_PARM_DESC(sdb_addr, "SDB address");
MODULE_LICENSE("GPL");
MODULE_VERSION(SPEC_WB_VERSION);
......
pcie-wb/spec_wb.h
View file @ ee1e2292
......@@ -31,6 +31,7 @@ struct spec_wb_dev {
struct pci_dev* pci_dev;
struct spec_wb_resource pci_res[3];
int pci_irq[4];
int msi;
struct wishbone wb;
struct mutex mutex; /* only one user can open a cycle at a time */
......
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