shpchp_core.c

优龙2410linux2.6.8内核源代码

	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	retval = slot->hpc_ops->get_adapter_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->adapter_status;

	return 0;
}

static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
{
	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	
	retval = slot->hpc_ops->get_max_bus_speed(slot, value);
	if (retval < 0)
		*value = PCI_SPEED_UNKNOWN;

	return 0;
}

static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
{
	struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	
	retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
	if (retval < 0)
		*value = PCI_SPEED_UNKNOWN;

	return 0;
}

static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	int rc;
	struct controller *ctrl;
	struct slot *t_slot;
	int first_device_num;	/* first PCI device number supported by this SHPC */
	int num_ctlr_slots;	/* number of slots supported by this SHPC */

	ctrl = (struct controller *) kmalloc(sizeof(struct controller), GFP_KERNEL);
	if (!ctrl) {
		err("%s : out of memory\n", __FUNCTION__);
		goto err_out_none;
	}
	memset(ctrl, 0, sizeof(struct controller));

	dbg("DRV_thread pid = %d\n", current->pid);

	rc = shpc_init(ctrl, pdev,
			(php_intr_callback_t) shpchp_handle_attention_button,
			(php_intr_callback_t) shpchp_handle_switch_change,
			(php_intr_callback_t) shpchp_handle_presence_change,
			(php_intr_callback_t) shpchp_handle_power_fault);
	if (rc) {
		dbg("%s: controller initialization failed\n", SHPC_MODULE_NAME);
		goto err_out_free_ctrl;
	}

	dbg("%s: controller initialization success\n", __FUNCTION__);
	ctrl->pci_dev = pdev;  /* pci_dev of the P2P bridge */

	pci_set_drvdata(pdev, ctrl);

	ctrl->pci_bus = kmalloc (sizeof (*ctrl->pci_bus), GFP_KERNEL);
	if (!ctrl->pci_bus) {
		err("out of memory\n");
		rc = -ENOMEM;
		goto err_out_unmap_mmio_region;
	}
	
	memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus));
	ctrl->bus = pdev->bus->number;
	ctrl->slot_bus = pdev->subordinate->number;

	ctrl->device = PCI_SLOT(pdev->devfn);
	ctrl->function = PCI_FUNC(pdev->devfn);
	dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", ctrl->bus, ctrl->device, ctrl->function, pdev->irq);

	/*
	 *	Save configuration headers for this and subordinate PCI buses
	 */

	rc = get_ctlr_slot_config(ctrl);
	if (rc) {
		err(msg_initialization_err, rc);
		goto err_out_free_ctrl_bus;
	}
	first_device_num = ctrl->slot_device_offset;
	num_ctlr_slots = ctrl->num_slots;

	/* Store PCI Config Space for all devices on this bus */
	rc = shpchp_save_config(ctrl, ctrl->slot_bus, num_ctlr_slots, first_device_num);
	if (rc) {
		err("%s: unable to save PCI configuration data, error %d\n", __FUNCTION__, rc);
		goto err_out_free_ctrl_bus;
	}

	/* Get IO, memory, and IRQ resources for new devices */
	rc = shpchprm_find_available_resources(ctrl);
	ctrl->add_support = !rc;
	
	if (rc) {
		dbg("shpchprm_find_available_resources = %#x\n", rc);
		err("unable to locate PCI configuration resources for hot plug add.\n");
		goto err_out_free_ctrl_bus;
	}

	/* Setup the slot information structures */
	rc = init_slots(ctrl);
	if (rc) {
		err(msg_initialization_err, 6);
		goto err_out_free_ctrl_slot;
	}

	/* Now hpc_functions (slot->hpc_ops->functions) are ready  */
	t_slot = shpchp_find_slot(ctrl, first_device_num);

	/* Check for operation bus speed */
	rc = t_slot->hpc_ops->get_cur_bus_speed(t_slot, &ctrl->speed);
	dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__,t_slot->hp_slot);

	if (rc || ctrl->speed == PCI_SPEED_UNKNOWN) {
		err(SHPC_MODULE_NAME ": Can't get current bus speed. Set to 33MHz PCI.\n");
		ctrl->speed = PCI_SPEED_33MHz;
	}

	/* Finish setting up the hot plug ctrl device */
	ctrl->next_event = 0;

	if (!shpchp_ctrl_list) {
		shpchp_ctrl_list = ctrl;
		ctrl->next = NULL;
	} else {
		ctrl->next = shpchp_ctrl_list;
		shpchp_ctrl_list = ctrl;
	}

	shpchp_create_ctrl_files(ctrl);

	return 0;

err_out_free_ctrl_slot:
	cleanup_slots(ctrl);
err_out_free_ctrl_bus:
	kfree(ctrl->pci_bus);
err_out_unmap_mmio_region:
	ctrl->hpc_ops->release_ctlr(ctrl);
err_out_free_ctrl:
	kfree(ctrl);
err_out_none:
	return -ENODEV;
}


static int shpc_start_thread(void)
{
	int loop;
	int retval = 0;
	
	dbg("Initialize + Start the notification/polling mechanism \n");

	retval = shpchp_event_start_thread();
	if (retval) {
		dbg("shpchp_event_start_thread() failed\n");
		return retval;
	}

	dbg("Initialize slot lists\n");
	/* One slot list for each bus in the system */
	for (loop = 0; loop < 256; loop++) {
		shpchp_slot_list[loop] = NULL;
	}

	return retval;
}

static inline void __exit
free_shpchp_res(struct pci_resource *res)
{
	struct pci_resource *tres;

	while (res) {
		tres = res;
		res = res->next;
		kfree(tres);
	}
}

static void __exit unload_shpchpd(void)
{
	struct pci_func *next;
	struct pci_func *TempSlot;
	int loop;
	struct controller *ctrl;
	struct controller *tctrl;

	ctrl = shpchp_ctrl_list;

	while (ctrl) {
		cleanup_slots(ctrl);

		free_shpchp_res(ctrl->io_head);
		free_shpchp_res(ctrl->mem_head);
		free_shpchp_res(ctrl->p_mem_head);
		free_shpchp_res(ctrl->bus_head);

		kfree (ctrl->pci_bus);

		dbg("%s: calling release_ctlr\n", __FUNCTION__);
		ctrl->hpc_ops->release_ctlr(ctrl);

		tctrl = ctrl;
		ctrl = ctrl->next;

		kfree(tctrl);
	}

	for (loop = 0; loop < 256; loop++) {
		next = shpchp_slot_list[loop];
		while (next != NULL) {
			free_shpchp_res(next->io_head);
			free_shpchp_res(next->mem_head);
			free_shpchp_res(next->p_mem_head);
			free_shpchp_res(next->bus_head);

			TempSlot = next;
			next = next->next;
			kfree(TempSlot);
		}
	}

	/* Stop the notification mechanism */
	shpchp_event_stop_thread();

}


static struct pci_device_id shpcd_pci_tbl[] = {
	{
	.class =        ((PCI_CLASS_BRIDGE_PCI << 8) | 0x00),
	.class_mask =	~0,
	.vendor =       PCI_ANY_ID,
	.device =       PCI_ANY_ID,
	.subvendor =    PCI_ANY_ID,
	.subdevice =    PCI_ANY_ID,
	},
	
	{ /* end: all zeroes */ }
};

MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);



static struct pci_driver shpc_driver = {
	.name =		SHPC_MODULE_NAME,
	.id_table =	shpcd_pci_tbl,
	.probe =	shpc_probe,
	/* remove:	shpc_remove_one, */
};



static int __init shpcd_init(void)
{
	int retval = 0;

#ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE
	shpchp_poll_mode = 1;
#endif

	retval = shpc_start_thread();
	if (retval)
		goto error_hpc_init;

	retval = shpchprm_init(PCI);
	if (!retval) {
		retval = pci_module_init(&shpc_driver);
		dbg("%s: pci_module_init = %d\n", __FUNCTION__, retval);
		info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	}

error_hpc_init:
	if (retval) {
		shpchprm_cleanup();
		shpchp_event_stop_thread();
	} else
		shpchprm_print_pirt();

	return retval;
}

static void __exit shpcd_cleanup(void)
{
	dbg("unload_shpchpd()\n");
	unload_shpchpd();

	shpchprm_cleanup();

	dbg("pci_unregister_driver\n");
	pci_unregister_driver(&shpc_driver);

	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}

module_init(shpcd_init);
module_exit(shpcd_cleanup);