1 // SPDX-License-Identifier: GPL-2.0-or-later
7  * Copyright (c) 2001-2023 Helge Deller <deller@gmx.de>
9  * Copyright (c) 2004-2005 Thibaut VARENE <varenet@parisc-linux.org>
16  *  - 715/Mirage device paths have a dummy device between Lasi and its children
17  *  - The EISA adapter may show up as a sibling or child of Wax
18  *  - Dino has an optionally functional serial port.  If firmware enables it,
21  *  - Dino has both parisc and pci devices as children
22  *  - parisc devices are discovered in a random order, including children
33 #include <linux/dma-map-ops.h>
37 #include <asm/parisc-device.h>
40 /* See comments in include/asm-parisc/pci.h */
50 	if (dev->bus == &parisc_bus_type) {  in check_dev()
53 		return pdev->id.hw_type != HPHW_FAULTY;  in check_dev()
70 	if (recurse_data->fn(dev, recurse_data->obj))  in descend_children()
77  * for_each_padev - Iterate over all devices in the tree
81  * This performs a depth-first traversal of the tree, calling the
96  * match_device - Report whether this driver can handle this device
97  * @driver: the PA-RISC driver to try
98  * @dev: the PA-RISC device to try
102 	const struct parisc_device_id *ids;  in match_device()  local
104 	for (ids = driver->id_table; ids->sversion; ids++) {  in match_device()
105 		if ((ids->sversion != SVERSION_ANY_ID) &&  in match_device()
106 		    (ids->sversion != dev->id.sversion))  in match_device()
109 		if ((ids->hw_type != HWTYPE_ANY_ID) &&  in match_device()
110 		    (ids->hw_type != dev->id.hw_type))  in match_device()
113 		if ((ids->hversion != HVERSION_ANY_ID) &&  in match_device()
114 		    (ids->hversion != dev->id.hversion))  in match_device()
126 	struct parisc_driver *pa_drv = to_parisc_driver(dev->driver);  in parisc_driver_probe()
128 	rc = pa_drv->probe(pa_dev);  in parisc_driver_probe()
131 		pa_dev->driver = pa_drv;  in parisc_driver_probe()
139 	struct parisc_driver *pa_drv = to_parisc_driver(dev->driver);  in parisc_driver_remove()
141 	if (pa_drv->remove)  in parisc_driver_remove()
142 		pa_drv->remove(pa_dev);  in parisc_driver_remove()
147  * register_parisc_driver - Register this driver if it can handle a device
148  * @driver: the PA-RISC driver to try
154 	if (driver->drv.name) {  in register_parisc_driver()
156 			driver->name);  in register_parisc_driver()
160 	if (!driver->probe) {  in register_parisc_driver()
161 		pr_warn("BUG: driver %s has no probe routine\n", driver->name);  in register_parisc_driver()
165 	driver->drv.bus = &parisc_bus_type;  in register_parisc_driver()
168 	WARN_ON(driver->drv.probe != NULL);  in register_parisc_driver()
169 	WARN_ON(driver->drv.remove != NULL);  in register_parisc_driver()
171 	driver->drv.name = driver->name;  in register_parisc_driver()
173 	return driver_register(&driver->drv);  in register_parisc_driver()
189 		if (match_device(m->driver, pdev))  in match_and_count()
190 			m->count++;  in match_and_count()
196  * count_parisc_driver - count # of devices this driver would match
197  * @driver: the PA-RISC driver to try
217  * unregister_parisc_driver - Unregister this driver from the list of drivers
218  * @driver: the PA-RISC driver to unregister
222 	driver_unregister(&driver->drv);  in unregister_parisc_driver()
238 		if (pdev->hpa.start == d->hpa) {  in find_device()
239 			d->dev = pdev;  in find_device()
263 	if (pdev->id.hw_type != HPHW_BCPORT)  in is_IKE_device()
266 		(pdev->id.hversion == REO_MERCED_PORT) ||  in is_IKE_device()
267 		(pdev->id.hversion == REOG_MERCED_PORT)) {  in is_IKE_device()
282  * find_pa_parent_type - Find a parent of a specific type
292 	const struct device *dev = &padev->dev;  in find_pa_parent_type()
295 		if (candidate->id.hw_type == type)  in find_pa_parent_type()
297 		dev = dev->parent;  in find_pa_parent_type()
313 	memset(&path->bc, -1, 6);  in get_node_path()
316 		unsigned int devfn = to_pci_dev(dev)->devfn;  in get_node_path()
317 		path->mod = PCI_FUNC(devfn);  in get_node_path()
318 		path->bc[i--] = PCI_SLOT(devfn);  in get_node_path()
319 		dev = dev->parent;  in get_node_path()
324 			unsigned int devfn = to_pci_dev(dev)->devfn;  in get_node_path()
325 			path->bc[i--] = PCI_SLOT(devfn) | (PCI_FUNC(devfn)<< 5);  in get_node_path()
326 		} else if (dev->bus == &parisc_bus_type) {  in get_node_path()
327 			path->bc[i--] = to_parisc_device(dev)->hw_path;  in get_node_path()
329 		dev = dev->parent;  in get_node_path()
337 		if (path->bc[i] == -1)  in print_hwpath()
339 		output += sprintf(output, "%u/", (unsigned char) path->bc[i]);  in print_hwpath()
341 	output += sprintf(output, "%u", (unsigned char) path->mod);  in print_hwpath()
346  * print_pa_hwpath - Returns hardware path for PA devices
348  * @output: Pointer to a previously-allocated array to place the path in.
350  * This function fills in the output array with a human-readable path
358 	get_node_path(dev->dev.parent, &path);  in print_pa_hwpath()
359 	path.mod = dev->hw_path;  in print_pa_hwpath()
366  * get_pci_node_path - Determines the hardware path for a PCI device
368  * @path: Pointer to a previously-allocated array to place the path in.
376 	get_node_path(&pdev->dev, path);  in get_pci_node_path()
381  * print_pci_hwpath - Returns hardware path for PCI devices
383  * @output: Pointer to a previously-allocated array to place the path in.
385  * This function fills in the output array with a human-readable path
407 	get_node_path(padev->dev.parent, &path);  in setup_bus_id()
410 		if (path.bc[i] == -1)  in setup_bus_id()
414 	sprintf(output, "%u", (unsigned char) padev->hw_path);  in setup_bus_id()
415 	dev_set_name(&padev->dev, name);  in setup_bus_id()
425 	dev->hw_path = id;  in create_tree_node()
426 	dev->id.hw_type = HPHW_FAULTY;  in create_tree_node()
428 	dev->dev.parent = parent;  in create_tree_node()
431 	dev->dev.bus = &parisc_bus_type;  in create_tree_node()
432 	dev->dma_mask = 0xffffffffUL;	/* PARISC devices are 32-bit */  in create_tree_node()
435 	dev->dev.dma_mask = &dev->dma_mask;  in create_tree_node()
436 	dev->dev.coherent_dma_mask = dev->dma_mask;  in create_tree_node()
437 	if (device_register(&dev->dev)) {  in create_tree_node()
455 	if (pdev->hw_path == d->id) {  in match_by_id()
456 		d->dev = pdev;  in match_by_id()
463  * alloc_tree_node - returns a device entry in the iotree
487 		if (modpath->bc[i] == -1)  in create_parisc_device()
489 		parent = &alloc_tree_node(parent, modpath->bc[i])->dev;  in create_parisc_device()
491 	return alloc_tree_node(parent, modpath->mod);  in create_parisc_device()
503 	/* Check to make sure this device has not already been added - Ryan */  in alloc_pa_dev()
512 	if (dev->id.hw_type != HPHW_FAULTY) {  in alloc_pa_dev()
519 	dev->id.hw_type = iodc_data[3] & 0x1f;  in alloc_pa_dev()
520 	dev->id.hversion = (iodc_data[0] << 4) | ((iodc_data[1] & 0xf0) >> 4);  in alloc_pa_dev()
521 	dev->id.hversion_rev = iodc_data[1] & 0x0f;  in alloc_pa_dev()
522 	dev->id.sversion = ((iodc_data[4] & 0x0f) << 16) |  in alloc_pa_dev()
524 	dev->hpa.start = hpa;  in alloc_pa_dev()
530 		dev->hpa.end = hpa + 0x03ffffff;  in alloc_pa_dev()
532 		dev->hpa.end = hpa + 0x01ffffff;  in alloc_pa_dev()
534 		dev->hpa.end = hpa + 0xfff;  in alloc_pa_dev()
536 	dev->hpa.flags = IORESOURCE_MEM;  in alloc_pa_dev()
537 	dev->hpa.name = dev->name;  in alloc_pa_dev()
538 	name = parisc_hardware_description(&dev->id) ? : "unknown";  in alloc_pa_dev()
539 	snprintf(dev->name, sizeof(dev->name), "%s [%s]",  in alloc_pa_dev()
545 	if ((hpa & 0xfff) == 0 && insert_resource(&iomem_resource, &dev->hpa))  in alloc_pa_dev()
559 	const struct parisc_device_id *id = &padev->id;  in make_modalias()
562 		(u8)id->hw_type, (u16)id->hversion, (u8)id->hversion_rev,  in make_modalias()
563 		(u32)id->sversion);  in make_modalias()
572 		return -ENODEV;  in parisc_uevent()
576 		return -ENODEV;  in parisc_uevent()
578 	if (add_uevent_var(env, "PARISC_NAME=%s", padev->name))  in parisc_uevent()
579 		return -ENOMEM;  in parisc_uevent()
583 		return -ENOMEM;  in parisc_uevent()
592 	return sprintf(buf, format_string, padev->field);		\
631  * register_parisc_device - Locate a driver to manage this device.
642 	if (dev->driver)  in register_parisc_device()
649  * match_pci_device - Matches a pci device against a given hardware path
664 		unsigned int devfn = pdev->devfn;  in match_pci_device()
665 		return ((modpath->bc[5] == PCI_SLOT(devfn)) &&  in match_pci_device()
666 					(modpath->mod == PCI_FUNC(devfn)));  in match_pci_device()
673 	id = PCI_SLOT(pdev->devfn) | (PCI_FUNC(pdev->devfn) << 5);  in match_pci_device()
674 	return (modpath->bc[index] == id);  in match_pci_device()
678  * match_parisc_device - Matches a parisc device against a given hardware
689 	char id = (index == 6) ? modpath->mod : modpath->bc[index];  in match_parisc_device()
691 	return (curr->hw_path == id);  in match_parisc_device()
705 		if (dev->bus == &parisc_bus_type) {  in check_parent()
706 			if (match_parisc_device(dev, d->index, d->modpath))  in check_parent()
707 				d->dev = dev;  in check_parent()
709 			if (match_pci_device(dev, d->index, d->modpath))  in check_parent()
710 				d->dev = dev;  in check_parent()
711 		} else if (dev->bus == NULL) {  in check_parent()
713 			struct device *new = parse_tree_node(dev, d->index, d->modpath);  in check_parent()
715 				d->dev = new;  in check_parent()
718 	return d->dev != NULL;  in check_parent()
722  * parse_tree_node - returns a device entry in the iotree
751  * hwpath_to_device - Finds the generic device corresponding to a given hardware path.
760 		if (modpath->bc[i] == -1)  in hwpath_to_device()
774  * device_to_hwpath - Populates the hwpath corresponding to the given device.
781 	if (dev->bus == &parisc_bus_type) {  in device_to_hwpath()
783 		get_node_path(dev->parent, path);  in device_to_hwpath()
784 		path->mod = padev->hw_path;  in device_to_hwpath()
795         ((dev->id.hw_type == HPHW_IOA) || (dev->id.hw_type == HPHW_BCPORT))
798         ((gsc_readl(dev->hpa.start + offsetof(struct bc_module, io_status)) \
807 #define READ_IO_IO_LOW(dev)  (unsigned long)(signed int)gsc_readl(dev->hpa.start + IO_IO_LOW)
808 #define READ_IO_IO_HIGH(dev) (unsigned long)(signed int)gsc_readl(dev->hpa.start + IO_IO_HIGH)
820 	if (dev->id.hw_type == HPHW_IOA) {  in walk_lower_bus()
828 	walk_native_bus(io_io_low, io_io_high, &dev->dev);  in walk_lower_bus()
832  * walk_native_bus -- Probe a bus for devices
874  * walk_central_bus - Find devices attached to the central bus
891 		++count, dev->name, &(dev->hpa.start), dev->id.hw_type,  in print_parisc_device()
892 		dev->id.hversion, dev->id.sversion, dev->id.hversion_rev);  in print_parisc_device()
894 	if (dev->num_addrs) {  in print_parisc_device()
897 		for (k = 0; k < dev->num_addrs; k++)  in print_parisc_device()
898 			pr_cont("0x%lx ", dev->addr[k]);  in print_parisc_device()
904  * init_parisc_bus - Some preparation to be done before inventory
909 		panic("Could not register PA-RISC bus type\n");  in init_parisc_bus()
911 		panic("Could not register PA-RISC root device\n");  in init_parisc_bus()
917 	int num;  in qemu_header()  local
920 	pr_info("--- cut here ---\n");  in qemu_header()
921 	pr_info("/* AUTO-GENERATED HEADER FILE FOR SEABIOS FIRMWARE */\n");  in qemu_header()
945 		(unsigned long)(PAGE0->mem_pdc_hi) << 32 |  in qemu_header()
947 		(unsigned long)PAGE0->mem_pdc);  in qemu_header()
951 	for (num = 0; num < sizeof(cache_info); num += sizeof(unsigned long)) {  in qemu_header()
952 		if (((num % 5) == 0)) {  in qemu_header()
957 			num?", ":"", *p++);  in qemu_header()
965 	unsigned long hpa = dev->hpa.start;  in qemu_print_hpa()
982 	pr_info("--- cut here ---\n");  in qemu_footer()
990 	unsigned long hpa = dev->hpa.start;  in qemu_print_iodc_data()
1011 		hpa, parisc_hardware_description(&dev->id));  in qemu_print_iodc_data()
1068 	pr_info("#define HPA_%08lx_num_addr %d\n", hpa, dev->num_addrs);  in qemu_print_iodc_data()
1071 	if (dev->num_addrs == 0)  in qemu_print_iodc_data()
1073 	while (count < dev->num_addrs) {  in qemu_print_iodc_data()
1074 		pr_cont("0x%08lx, ", dev->addr[count]);  in qemu_print_iodc_data()
1094  * print_parisc_devices - Print out a list of devices found in this system