shpchp_ctrl.c

优龙2410linux2.6.8内核源代码

						/* Wait for the command to complete */
						wait_for_ctrl_irq (ctrl);

						/* Done with exclusive hardware access */
						up(&ctrl->crit_sect);
						break;
					case BLINKINGON_STATE:
						/* Wait for exclusive access to hardware */
						down(&ctrl->crit_sect);

						p_slot->hpc_ops->green_led_off(p_slot);
						/* Wait for the command to complete */
						wait_for_ctrl_irq (ctrl);

						p_slot->hpc_ops->set_attention_status(p_slot, 0);
						/* Wait for the command to complete */
						wait_for_ctrl_irq (ctrl);

						/* Done with exclusive hardware access */
						up(&ctrl->crit_sect);

						break;
					default:
						warn("Not a valid state\n");
						return;
					}
					info(msg_button_cancel, p_slot->number);
					p_slot->state = STATIC_STATE;
				} else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
					/* Button Pressed (No action on 1st press...) */
					dbg("%s: Button pressed\n", __FUNCTION__);

					p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
					if (getstatus) {
						/* slot is on */
						dbg("%s: slot is on\n", __FUNCTION__);
						p_slot->state = BLINKINGOFF_STATE;
						info(msg_button_off, p_slot->number);
					} else {
						/* slot is off */
						dbg("%s: slot is off\n", __FUNCTION__);
						p_slot->state = BLINKINGON_STATE;
						info(msg_button_on, p_slot->number);
					}

					/* Wait for exclusive access to hardware */
					down(&ctrl->crit_sect);

					/* blink green LED and turn off amber */
					p_slot->hpc_ops->green_led_blink(p_slot);
					/* Wait for the command to complete */
					wait_for_ctrl_irq (ctrl);
					
					p_slot->hpc_ops->set_attention_status(p_slot, 0);

					/* Wait for the command to complete */
					wait_for_ctrl_irq (ctrl);

					/* Done with exclusive hardware access */
					up(&ctrl->crit_sect);

					init_timer(&p_slot->task_event);
					p_slot->task_event.expires = jiffies + 5 * HZ;   /* 5 second delay */
					p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
					p_slot->task_event.data = (unsigned long) p_slot;

					dbg("%s: add_timer p_slot = %p\n", __FUNCTION__,(void *) p_slot);
					add_timer(&p_slot->task_event);
				} else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
					/***********POWER FAULT********************/
					dbg("%s: power fault\n", __FUNCTION__);
					/* Wait for exclusive access to hardware */
					down(&ctrl->crit_sect);

					p_slot->hpc_ops->set_attention_status(p_slot, 1);
					/* Wait for the command to complete */
					wait_for_ctrl_irq (ctrl);
					
					p_slot->hpc_ops->green_led_off(p_slot);
					/* Wait for the command to complete */
					wait_for_ctrl_irq (ctrl);

					/* Done with exclusive hardware access */
					up(&ctrl->crit_sect);
				} else {
					/* refresh notification */
					if (p_slot)
						update_slot_info(p_slot);
				}

				ctrl->event_queue[loop].event_type = 0;

				change = 1;
			}
		}		/* End of FOR loop */
	}

	return;
}


int shpchp_enable_slot (struct slot *p_slot)
{
	u8 getstatus = 0;
	int rc;
	struct pci_func *func;

	func = shpchp_slot_find(p_slot->bus, p_slot->device, 0);
	if (!func) {
		dbg("%s: Error! slot NULL\n", __FUNCTION__);
		return 1;
	}

	/* Check to see if (latch closed, card present, power off) */
	down(&p_slot->ctrl->crit_sect);
	rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
	if (rc || !getstatus) {
		info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
		up(&p_slot->ctrl->crit_sect);
		return 1;
	}
	rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
	if (rc || getstatus) {
		info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
		up(&p_slot->ctrl->crit_sect);
		return 1;
	}
	rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
	if (rc || getstatus) {
		info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
		up(&p_slot->ctrl->crit_sect);
		return 1;
	}
	up(&p_slot->ctrl->crit_sect);

	slot_remove(func);

	func = shpchp_slot_create(p_slot->bus);
	if (func == NULL)
		return 1;

	func->bus = p_slot->bus;
	func->device = p_slot->device;
	func->function = 0;
	func->configured = 0;
	func->is_a_board = 1;

	/* We have to save the presence info for these slots */
	p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
	p_slot->hpc_ops->get_power_status(p_slot, &(func->pwr_save));
	dbg("%s: func->pwr_save %x\n", __FUNCTION__, func->pwr_save);
	p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
	func->switch_save = !getstatus? 0x10:0;

	rc = board_added(func, p_slot->ctrl);
	if (rc) {
		if (is_bridge(func))
			bridge_slot_remove(func);
		else
			slot_remove(func);

		/* Setup slot structure with entry for empty slot */
		func = shpchp_slot_create(p_slot->bus);
		if (func == NULL)
			return (1);	/* Out of memory */

		func->bus = p_slot->bus;
		func->device = p_slot->device;
		func->function = 0;
		func->configured = 0;
		func->is_a_board = 1;

		/* We have to save the presence info for these slots */
		p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
		p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
		func->switch_save = !getstatus? 0x10:0;
	}

	if (p_slot)
		update_slot_info(p_slot);

	return rc;
}


int shpchp_disable_slot (struct slot *p_slot)
{
	u8 class_code, header_type, BCR;
	u8 index = 0;
	u8 getstatus = 0;
	u32 rc = 0;
	int ret = 0;
	unsigned int devfn;
	struct pci_bus *pci_bus = p_slot->ctrl->pci_dev->subordinate;
	struct pci_func *func;

	if (!p_slot->ctrl)
		return 1;

	/* Check to see if (latch closed, card present, power on) */
	down(&p_slot->ctrl->crit_sect);

	ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
	if (ret || !getstatus) {
		info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
		up(&p_slot->ctrl->crit_sect);
		return 1;
	}
	ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
	if (ret || getstatus) {
		info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
		up(&p_slot->ctrl->crit_sect);
		return 1;
	}
	ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
	if (ret || !getstatus) {
		info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
		up(&p_slot->ctrl->crit_sect);
		return 1;
	}
	up(&p_slot->ctrl->crit_sect);

	func = shpchp_slot_find(p_slot->bus, p_slot->device, index++);

	/* Make sure there are no video controllers here
	 * for all func of p_slot
	 */
	while (func && !rc) {
		pci_bus->number = func->bus;
		devfn = PCI_DEVFN(func->device, func->function);

		/* Check the Class Code */
		rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
		if (rc)
			return rc;

		if (class_code == PCI_BASE_CLASS_DISPLAY) {
			/* Display/Video adapter (not supported) */
			rc = REMOVE_NOT_SUPPORTED;
		} else {
			/* See if it's a bridge */
			rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
			if (rc)
				return rc;

			/* If it's a bridge, check the VGA Enable bit */
			if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
				rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
				if (rc)
					return rc;

				/* If the VGA Enable bit is set, remove isn't supported */
				if (BCR & PCI_BRIDGE_CTL_VGA) {
					rc = REMOVE_NOT_SUPPORTED;
				}
			}
		}

		func = shpchp_slot_find(p_slot->bus, p_slot->device, index++);
	}

	func = shpchp_slot_find(p_slot->bus, p_slot->device, 0);
	if ((func != NULL) && !rc) {
		rc = remove_board(func, p_slot->ctrl);
	} else if (!rc)
		rc = 1;

	if (p_slot)
		update_slot_info(p_slot);

	return(rc);
}


/**
 * configure_new_device - Configures the PCI header information of one board.
 *
 * @ctrl: pointer to controller structure
 * @func: pointer to function structure
 * @behind_bridge: 1 if this is a recursive call, 0 if not
 * @resources: pointer to set of resource lists
 *
 * Returns 0 if success
 *
 */
static u32 configure_new_device (struct controller * ctrl, struct pci_func * func,
	u8 behind_bridge, struct resource_lists * resources, u8 bridge_bus, u8 bridge_dev)
{
	u8 temp_byte, function, max_functions, stop_it;
	int rc;
	u32 ID;
	struct pci_func *new_slot;
	struct pci_bus lpci_bus, *pci_bus;
	int index;

	new_slot = func;

	dbg("%s\n", __FUNCTION__);
	memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
	pci_bus = &lpci_bus;
	pci_bus->number = func->bus;

	/* Check for Multi-function device */
	rc = pci_bus_read_config_byte(pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
	if (rc) {
		dbg("%s: rc = %d\n", __FUNCTION__, rc);
		return rc;
	}

	if (temp_byte & 0x80)	/* Multi-function device */
		max_functions = 8;
	else
		max_functions = 1;

	function = 0;

	do {
		rc = configure_new_function(ctrl, new_slot, behind_bridge, resources, bridge_bus, bridge_dev);

		if (rc) {
			dbg("configure_new_function failed %d\n",rc);
			index = 0;

			while (new_slot) {
				new_slot = shpchp_slot_find(new_slot->bus, new_slot->device, index++);

				if (new_slot)
					shpchp_return_board_resources(new_slot, resources);
			}

			return(rc);
		}

		function++;

		stop_it = 0;

		/*  The following loop skips to the next present function
		 *  and creates a board structure
		 */

		while ((function < max_functions) && (!stop_it)) {
			pci_bus_read_config_dword(pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);

			if (ID == 0xFFFFFFFF) {	  /* There's nothing there. */
				function++;
			} else {  /* There's something there */
				/* Setup slot structure. */
				new_slot = shpchp_slot_create(func->bus);

				if (new_slot == NULL) {
					/* Out of memory */
					return(1);
				}

				new_slot->bus = func->bus;
				new_slot->device = func->device;
				new_slot->function = function;
				new_slot->is_a_board = 1;
				new_slot->status = 0;

				stop_it++;
			}
		}

	} while (function < max_functions);
	dbg("returning from configure_new_device\n");

	return 0;
}


/*
 * Configuration logic that involves the hotplug data structures and 
 * their bookkeeping
 */


/**
 * configure_new_function - Configures the PCI header information of one device
 *
 * @ctrl: pointer to controller structure
 * @func: pointer to function structure
 * @behind_bridge: 1 if this is a recursive call, 0 if not
 * @resources: pointer to set of resource lists
 *
 * Calls itself recursively for bridged devices.
 * Returns 0 if success
 *
 */
static int configure_new_function (struct controller * ctrl, struct pci_func * func,
	u8 behind_bridge, struct resource_lists *resources, u8 bridge_bus, u8 bridge_dev)
{
	int cloop;
	u8 temp_byte;
	u8 device;
	u8 class_code;
	u16 temp_word;
	u32 rc;
	u32 temp_register;
	u32 base;
	u32 ID;
	unsigned int devfn;
	struct pci_resource *mem_node;
	struct pci_resource *p_mem_node;
	struct pci_resource *io_node;
	struct pci_resource *bus_node;
	struct pci_resource *hold_mem_node;
	struct pci_resource *hold_p_mem_node;
	struct pci_resource *hold_IO_node;
	struct pci_resource *hold_bus_node;
	struct irq_mapping irqs;
	struct pci_func *new_slot;
	struct pci_bus lpci_bus, *pci_bus;
	struct resource_lists temp_resources;
#if defined(CONFIG_X86_64)
	u8 IRQ=0;
#endif

	memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
	pci_bus = &lpci_bus;
	pci_bus->number = func->bus;
	devfn = PCI_DEVFN(func->device, func->function);

	/* Check for Bridge */
	rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
	if (rc)
		return rc;

	if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* PCI-PCI Bridge */
		/* set Primary bus */
		dbg("set Primary bus = 0x%x\n", func->bus);
		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
		if (rc)
			return rc;

		/* find range of busses to use */
		bus_node = get_max_resource(&resources->bus_head, 1L);

		/* If we don't have any busses to allocate, we can't continue */
		if (!bus_node) {
			err("Got NO bus resource to use\n");
			return -ENOMEM;
		}
		dbg("Got ranges of buses to use: base:len=0x%x:%x\n", bus_node->base, bus_node->length);

		/* set Secondary bus */
		temp_byte = (u8)bus_node->base;
		dbg("set Secondary bus = 0x%x\n", temp_byte);
		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
		if (rc)
			return rc;

		/* set subordinate bus */
		temp_byte = (u8)(bus_node->base + bus_node->length - 1);
		dbg("set subordinate bus = 0x%x\n", temp_byte);
		rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
		if (rc)
			return rc;

		/* Set HP parameters (Cache Line Size, Latency Timer) */
		rc = shpchprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
		if (rc)
			return rc;

		/* Setup the IO, memory, and prefetchable windows */

		io_node = get_max_resource(&(resources->io_head), 0x1000L);
		if (io_node) {
			dbg("io_node(base, len, next) (%x, %x, %p)\n", io_node->base, io_node->length, io_node->next);
		}

		mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
		if (mem_node) {
			dbg("mem_node(base, len, next) (%x, %x, %p)\n", mem_node->base, mem_node->length, mem_node->next);
		}

		if (resources->p_mem_head)
			p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000L);
		else {
			/*
			 * In some platform implementation, MEM and PMEM are not
			 *  distinguished, and hence ACPI _CRS has only MEM entries
			 *  for both MEM and PMEM.
			 */
			dbg("using MEM for PMEM\n");
			p_mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
		}
		if (p_mem_node) {
			dbg("p_mem_node(