check in the original version of dde linux26.

1 files changed, 189 insertions, 0 deletions

diff --git a/libdde_linux26/lib/src/arch/l4/pci.c b/libdde_linux26/lib/src/arch/l4/pci.c
new file mode 100644
index 00000000..2a0391f2
--- /dev/null
+++ b/libdde_linux26/lib/src/arch/l4/pci.c
@@ -0,0 +1,189 @@
+#include "local.h"
+
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/init.h>
+
+/* will include $(CONTRIB)/drivers/pci/pci.h */
+#include "pci.h"
+
+DECLARE_INITVAR(dde26_pci);
+
+/** PCI device descriptor */
+typedef struct l4dde_pci_dev {
+	struct list_head      next;         /**< chain info */
+	struct ddekit_pci_dev *ddekit_dev;  /**< corresponding DDEKit descriptor */
+	struct pci_dev        *linux_dev;   /**< Linux descriptor */
+} l4dde_pci_dev_t;
+
+
+/*******************************************************************************************
+ ** PCI data                                                                              **
+ *******************************************************************************************/
+/** List of Linux-DDEKit PCIDev mappings */
+static LIST_HEAD(pcidev_mappings);
+
+/** PCI bus */
+static struct pci_bus *pci_bus = NULL;
+
+static int l4dde26_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
+static int l4dde26_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
+
+/** PCI operations for our virtual PCI bus */
+static struct pci_ops dde_pcibus_ops = {
+	.read = l4dde26_pci_read,
+	.write = l4dde26_pci_write,
+};
+
+
+/*******************************************************************************************
+ ** Read/write PCI config space. This is simply mapped to the DDEKit functions.           **
+ *******************************************************************************************/
+static int l4dde26_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val)
+{
+  return ddekit_pci_read(bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val);
+}
+
+static int l4dde26_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
+{
+  return ddekit_pci_write(bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val);
+}
+
+int pci_irq_enable(struct pci_dev *dev)
+{
+	int irq = dev->irq;
+	int pin = 0;
+	int ret;
+
+	DEBUG_MSG("dev %p", dev);
+	if (!dev)
+		return -EINVAL;
+
+	pin = (int)dev->pin;
+	DEBUG_MSG("irq %d, pin %d", dev->irq, dev->pin);
+	if (!pin) {
+		dev_warn(&dev->dev,
+		         "No interrupt pin configured for device %s\n",
+		         pci_name(dev));
+		return 0;
+	}
+	pin--;
+
+	ret = ddekit_pci_irq_enable(dev->bus->number, PCI_SLOT(dev->devfn),
+	                            PCI_FUNC(dev->devfn), pin, &irq);
+	if (ret) {
+		dev_warn(&dev->dev, "Interrupt enable failed for device %s (%d)\n",
+		         pci_name(dev), ret);
+		return -1;
+	}
+
+	dev_info(&dev->dev, "PCI INT %c -> GSI %d -> IRQ %d\n",
+	         'A' + pin, irq, dev->irq);
+
+	dev->irq = irq;
+	return 0;
+}
+
+int __pci_enable_device(struct pci_dev *dev)
+{
+	WARN_UNIMPL;
+	return 0;
+}
+
+
+/**
+  * pci_enable_device - Initialize device before it's used by a driver.
+  *
+  * Initialize device before it's used by a driver. Ask low-level code
+  * to enable I/O and memory. Wake up the device if it was suspended.
+  * Beware, this function can fail.
+  *
+  * \param dev     PCI device to be initialized
+  *
+  */
+int
+pci_enable_device(struct pci_dev *dev)
+{
+	CHECK_INITVAR(dde26_pci);
+//	WARN_UNIMPL;
+	return pci_irq_enable(dev);
+}
+
+
+/**
+ * pci_disable_device - Disable PCI device after use
+ *
+ * Signal to the system that the PCI device is not in use by the system
+ * anymore.  This only involves disabling PCI bus-mastering, if active.
+ *
+ * \param dev     PCI device to be disabled
+ */
+void pci_disable_device(struct pci_dev *dev)
+{
+	CHECK_INITVAR(dde26_pci);
+	WARN_UNIMPL;
+}
+
+
+void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
+{
+	//WARN_UNIMPL;
+}
+
+void pci_set_master(struct pci_dev *dev)
+{
+	CHECK_INITVAR(dde26_pci);
+	WARN_UNIMPL;
+}
+
+
+int pci_create_sysfs_dev_files(struct pci_dev *pdev)
+{
+	return 0;
+}
+
+unsigned int pcibios_assign_all_busses(void)
+{
+  return 1;
+}
+
+void
+pcibios_align_resource(void *data, struct resource *res,
+			resource_size_t size, resource_size_t align)
+{
+	WARN_UNIMPL;
+}
+
+int pcibios_enable_device(struct pci_dev *dev, int mask)
+{
+#if 0
+	int err;
+
+	if ((err = pcibios_enable_resources(dev, mask)) < 0)
+		return err;
+
+	return pcibios_enable_irq(dev);
+#endif
+	return 0;
+}
+
+/*******************************************************************************************
+ ** Initialization function                                                               **
+ *******************************************************************************************/
+
+/** Initialize DDELinux PCI subsystem.
+ */
+void __init l4dde26_init_pci(void)
+{
+	ddekit_pci_init();
+
+	pci_bus = pci_create_bus(NULL, 0, &dde_pcibus_ops, NULL);
+	Assert(pci_bus);
+
+	pci_do_scan_bus(pci_bus);
+
+	INITIALIZE_INITVAR(dde26_pci);
+}
+
+arch_initcall(l4dde26_init_pci);