| /* |
| * Freescale Management Complex (MC) bus driver |
| * |
| * Copyright (C) 2014 Freescale Semiconductor, Inc. |
| * Author: German Rivera <German.Rivera@freescale.com> |
| * |
| * This file is licensed under the terms of the GNU General Public |
| * License version 2. This program is licensed "as is" without any |
| * warranty of any kind, whether express or implied. |
| */ |
| |
| #include "../include/mc-private.h" |
| #include <linux/module.h> |
| #include <linux/of_device.h> |
| #include <linux/of_address.h> |
| #include <linux/ioport.h> |
| #include <linux/slab.h> |
| #include <linux/limits.h> |
| #include "../include/dpmng.h" |
| #include "../include/mc-sys.h" |
| #include "dprc-cmd.h" |
| |
| static struct kmem_cache *mc_dev_cache; |
| |
| /** |
| * fsl_mc_bus_match - device to driver matching callback |
| * @dev: the MC object device structure to match against |
| * @drv: the device driver to search for matching MC object device id |
| * structures |
| * |
| * Returns 1 on success, 0 otherwise. |
| */ |
| static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv) |
| { |
| const struct fsl_mc_device_match_id *id; |
| struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); |
| struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv); |
| bool found = false; |
| |
| if (WARN_ON(!fsl_mc_bus_type.dev_root)) |
| goto out; |
| |
| if (!mc_drv->match_id_table) |
| goto out; |
| |
| /* |
| * If the object is not 'plugged' don't match. |
| * Only exception is the root DPRC, which is a special case. |
| */ |
| if ((mc_dev->obj_desc.state & DPRC_OBJ_STATE_PLUGGED) == 0 && |
| &mc_dev->dev != fsl_mc_bus_type.dev_root) |
| goto out; |
| |
| /* |
| * Traverse the match_id table of the given driver, trying to find |
| * a matching for the given MC object device. |
| */ |
| for (id = mc_drv->match_id_table; id->vendor != 0x0; id++) { |
| if (id->vendor == mc_dev->obj_desc.vendor && |
| strcmp(id->obj_type, mc_dev->obj_desc.type) == 0 && |
| id->ver_major == mc_dev->obj_desc.ver_major && |
| id->ver_minor == mc_dev->obj_desc.ver_minor) { |
| found = true; |
| break; |
| } |
| } |
| |
| out: |
| dev_dbg(dev, "%smatched\n", found ? "" : "not "); |
| return found; |
| } |
| |
| /** |
| * fsl_mc_bus_uevent - callback invoked when a device is added |
| */ |
| static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
| { |
| pr_debug("%s invoked\n", __func__); |
| return 0; |
| } |
| |
| struct bus_type fsl_mc_bus_type = { |
| .name = "fsl-mc", |
| .match = fsl_mc_bus_match, |
| .uevent = fsl_mc_bus_uevent, |
| }; |
| EXPORT_SYMBOL_GPL(fsl_mc_bus_type); |
| |
| static int fsl_mc_driver_probe(struct device *dev) |
| { |
| struct fsl_mc_driver *mc_drv; |
| struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); |
| int error; |
| |
| if (WARN_ON(!dev->driver)) |
| return -EINVAL; |
| |
| mc_drv = to_fsl_mc_driver(dev->driver); |
| if (WARN_ON(!mc_drv->probe)) |
| return -EINVAL; |
| |
| error = mc_drv->probe(mc_dev); |
| if (error < 0) { |
| dev_err(dev, "MC object device probe callback failed: %d\n", |
| error); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int fsl_mc_driver_remove(struct device *dev) |
| { |
| struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver); |
| struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); |
| int error; |
| |
| if (WARN_ON(!dev->driver)) |
| return -EINVAL; |
| |
| error = mc_drv->remove(mc_dev); |
| if (error < 0) { |
| dev_err(dev, |
| "MC object device remove callback failed: %d\n", |
| error); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static void fsl_mc_driver_shutdown(struct device *dev) |
| { |
| struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver); |
| struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); |
| |
| mc_drv->shutdown(mc_dev); |
| } |
| |
| /** |
| * __fsl_mc_driver_register - registers a child device driver with the |
| * MC bus |
| * |
| * This function is implicitly invoked from the registration function of |
| * fsl_mc device drivers, which is generated by the |
| * module_fsl_mc_driver() macro. |
| */ |
| int __fsl_mc_driver_register(struct fsl_mc_driver *mc_driver, |
| struct module *owner) |
| { |
| int error; |
| |
| mc_driver->driver.owner = owner; |
| mc_driver->driver.bus = &fsl_mc_bus_type; |
| |
| if (mc_driver->probe) |
| mc_driver->driver.probe = fsl_mc_driver_probe; |
| |
| if (mc_driver->remove) |
| mc_driver->driver.remove = fsl_mc_driver_remove; |
| |
| if (mc_driver->shutdown) |
| mc_driver->driver.shutdown = fsl_mc_driver_shutdown; |
| |
| error = driver_register(&mc_driver->driver); |
| if (error < 0) { |
| pr_err("driver_register() failed for %s: %d\n", |
| mc_driver->driver.name, error); |
| return error; |
| } |
| |
| pr_info("MC object device driver %s registered\n", |
| mc_driver->driver.name); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(__fsl_mc_driver_register); |
| |
| /** |
| * fsl_mc_driver_unregister - unregisters a device driver from the |
| * MC bus |
| */ |
| void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver) |
| { |
| driver_unregister(&mc_driver->driver); |
| } |
| EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister); |
| |
| static int get_dprc_icid(struct fsl_mc_io *mc_io, |
| int container_id, uint16_t *icid) |
| { |
| uint16_t dprc_handle; |
| struct dprc_attributes attr; |
| int error; |
| |
| error = dprc_open(mc_io, container_id, &dprc_handle); |
| if (error < 0) { |
| pr_err("dprc_open() failed: %d\n", error); |
| return error; |
| } |
| |
| memset(&attr, 0, sizeof(attr)); |
| error = dprc_get_attributes(mc_io, dprc_handle, &attr); |
| if (error < 0) { |
| pr_err("dprc_get_attributes() failed: %d\n", error); |
| goto common_cleanup; |
| } |
| |
| *icid = attr.icid; |
| error = 0; |
| |
| common_cleanup: |
| (void)dprc_close(mc_io, dprc_handle); |
| return error; |
| } |
| |
| static int translate_mc_addr(uint64_t mc_addr, phys_addr_t *phys_addr) |
| { |
| int i; |
| struct fsl_mc *mc = dev_get_drvdata(fsl_mc_bus_type.dev_root->parent); |
| |
| if (mc->num_translation_ranges == 0) { |
| /* |
| * Do identity mapping: |
| */ |
| *phys_addr = mc_addr; |
| return 0; |
| } |
| |
| for (i = 0; i < mc->num_translation_ranges; i++) { |
| struct fsl_mc_addr_translation_range *range = |
| &mc->translation_ranges[i]; |
| |
| if (mc_addr >= range->start_mc_addr && |
| mc_addr < range->end_mc_addr) { |
| *phys_addr = range->start_phys_addr + |
| (mc_addr - range->start_mc_addr); |
| return 0; |
| } |
| } |
| |
| return -EFAULT; |
| } |
| |
| static int fsl_mc_device_get_mmio_regions(struct fsl_mc_device *mc_dev, |
| struct fsl_mc_device *mc_bus_dev) |
| { |
| int i; |
| int error; |
| struct resource *regions; |
| struct dprc_obj_desc *obj_desc = &mc_dev->obj_desc; |
| struct device *parent_dev = mc_dev->dev.parent; |
| |
| regions = kmalloc_array(obj_desc->region_count, |
| sizeof(regions[0]), GFP_KERNEL); |
| if (!regions) |
| return -ENOMEM; |
| |
| for (i = 0; i < obj_desc->region_count; i++) { |
| struct dprc_region_desc region_desc; |
| |
| error = dprc_get_obj_region(mc_bus_dev->mc_io, |
| mc_bus_dev->mc_handle, |
| obj_desc->type, |
| obj_desc->id, i, ®ion_desc); |
| if (error < 0) { |
| dev_err(parent_dev, |
| "dprc_get_obj_region() failed: %d\n", error); |
| goto error_cleanup_regions; |
| } |
| |
| WARN_ON(region_desc.base_paddr == 0x0); |
| WARN_ON(region_desc.size == 0); |
| error = translate_mc_addr(region_desc.base_paddr, |
| ®ions[i].start); |
| if (error < 0) { |
| dev_err(parent_dev, |
| "Invalid MC address: %#llx\n", |
| region_desc.base_paddr); |
| goto error_cleanup_regions; |
| } |
| |
| regions[i].end = regions[i].start + region_desc.size - 1; |
| regions[i].name = "fsl-mc object MMIO region"; |
| regions[i].flags = IORESOURCE_IO; |
| } |
| |
| mc_dev->regions = regions; |
| return 0; |
| |
| error_cleanup_regions: |
| kfree(regions); |
| return error; |
| } |
| |
| /** |
| * Add a newly discovered MC object device to be visible in Linux |
| */ |
| int fsl_mc_device_add(struct dprc_obj_desc *obj_desc, |
| struct fsl_mc_io *mc_io, |
| struct device *parent_dev, |
| struct fsl_mc_device **new_mc_dev) |
| { |
| int error; |
| struct fsl_mc_device *mc_dev = NULL; |
| struct fsl_mc_bus *mc_bus = NULL; |
| struct fsl_mc_device *parent_mc_dev; |
| |
| if (parent_dev->bus == &fsl_mc_bus_type) |
| parent_mc_dev = to_fsl_mc_device(parent_dev); |
| else |
| parent_mc_dev = NULL; |
| |
| if (strcmp(obj_desc->type, "dprc") == 0) { |
| /* |
| * Allocate an MC bus device object: |
| */ |
| mc_bus = devm_kzalloc(parent_dev, sizeof(*mc_bus), GFP_KERNEL); |
| if (!mc_bus) |
| return -ENOMEM; |
| |
| mc_dev = &mc_bus->mc_dev; |
| } else { |
| /* |
| * Allocate a regular fsl_mc_device object: |
| */ |
| mc_dev = kmem_cache_zalloc(mc_dev_cache, GFP_KERNEL); |
| if (!mc_dev) |
| return -ENOMEM; |
| } |
| |
| mc_dev->obj_desc = *obj_desc; |
| mc_dev->mc_io = mc_io; |
| device_initialize(&mc_dev->dev); |
| mc_dev->dev.parent = parent_dev; |
| mc_dev->dev.bus = &fsl_mc_bus_type; |
| dev_set_name(&mc_dev->dev, "%s.%d", obj_desc->type, obj_desc->id); |
| |
| if (strcmp(obj_desc->type, "dprc") == 0) { |
| struct fsl_mc_io *mc_io2; |
| |
| mc_dev->flags |= FSL_MC_IS_DPRC; |
| |
| /* |
| * To get the DPRC's ICID, we need to open the DPRC |
| * in get_dprc_icid(). For child DPRCs, we do so using the |
| * parent DPRC's MC portal instead of the child DPRC's MC |
| * portal, in case the child DPRC is already opened with |
| * its own portal (e.g., the DPRC used by AIOP). |
| * |
| * NOTE: There cannot be more than one active open for a |
| * given MC object, using the same MC portal. |
| */ |
| if (parent_mc_dev) { |
| /* |
| * device being added is a child DPRC device |
| */ |
| mc_io2 = parent_mc_dev->mc_io; |
| } else { |
| /* |
| * device being added is the root DPRC device |
| */ |
| if (WARN_ON(!mc_io)) { |
| error = -EINVAL; |
| goto error_cleanup_dev; |
| } |
| |
| mc_io2 = mc_io; |
| |
| if (!fsl_mc_bus_type.dev_root) |
| fsl_mc_bus_type.dev_root = &mc_dev->dev; |
| } |
| |
| error = get_dprc_icid(mc_io2, obj_desc->id, &mc_dev->icid); |
| if (error < 0) |
| goto error_cleanup_dev; |
| } else { |
| /* |
| * A non-DPRC MC object device has to be a child of another |
| * MC object (specifically a DPRC object) |
| */ |
| mc_dev->icid = parent_mc_dev->icid; |
| mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK; |
| mc_dev->dev.dma_mask = &mc_dev->dma_mask; |
| } |
| |
| /* |
| * Get MMIO regions for the device from the MC: |
| * |
| * NOTE: the root DPRC is a special case as its MMIO region is |
| * obtained from the device tree |
| */ |
| if (parent_mc_dev && obj_desc->region_count != 0) { |
| error = fsl_mc_device_get_mmio_regions(mc_dev, |
| parent_mc_dev); |
| if (error < 0) |
| goto error_cleanup_dev; |
| } |
| |
| /* |
| * The device-specific probe callback will get invoked by device_add() |
| */ |
| error = device_add(&mc_dev->dev); |
| if (error < 0) { |
| dev_err(parent_dev, |
| "device_add() failed for device %s: %d\n", |
| dev_name(&mc_dev->dev), error); |
| goto error_cleanup_dev; |
| } |
| |
| (void)get_device(&mc_dev->dev); |
| dev_dbg(parent_dev, "Added MC object device %s\n", |
| dev_name(&mc_dev->dev)); |
| |
| *new_mc_dev = mc_dev; |
| return 0; |
| |
| error_cleanup_dev: |
| kfree(mc_dev->regions); |
| if (mc_bus) |
| devm_kfree(parent_dev, mc_bus); |
| else |
| kmem_cache_free(mc_dev_cache, mc_dev); |
| |
| return error; |
| } |
| EXPORT_SYMBOL_GPL(fsl_mc_device_add); |
| |
| /** |
| * fsl_mc_device_remove - Remove a MC object device from being visible to |
| * Linux |
| * |
| * @mc_dev: Pointer to a MC object device object |
| */ |
| void fsl_mc_device_remove(struct fsl_mc_device *mc_dev) |
| { |
| struct fsl_mc_bus *mc_bus = NULL; |
| |
| kfree(mc_dev->regions); |
| |
| /* |
| * The device-specific remove callback will get invoked by device_del() |
| */ |
| device_del(&mc_dev->dev); |
| put_device(&mc_dev->dev); |
| |
| if (strcmp(mc_dev->obj_desc.type, "dprc") == 0) { |
| struct fsl_mc_io *mc_io = mc_dev->mc_io; |
| |
| mc_bus = to_fsl_mc_bus(mc_dev); |
| fsl_destroy_mc_io(mc_io); |
| if (&mc_dev->dev == fsl_mc_bus_type.dev_root) |
| fsl_mc_bus_type.dev_root = NULL; |
| } |
| |
| mc_dev->mc_io = NULL; |
| if (mc_bus) |
| devm_kfree(mc_dev->dev.parent, mc_bus); |
| else |
| kmem_cache_free(mc_dev_cache, mc_dev); |
| } |
| EXPORT_SYMBOL_GPL(fsl_mc_device_remove); |
| |
| static int parse_mc_ranges(struct device *dev, |
| int *paddr_cells, |
| int *mc_addr_cells, |
| int *mc_size_cells, |
| const __be32 **ranges_start, |
| uint8_t *num_ranges) |
| { |
| const __be32 *prop; |
| int range_tuple_cell_count; |
| int ranges_len; |
| int tuple_len; |
| struct device_node *mc_node = dev->of_node; |
| |
| *ranges_start = of_get_property(mc_node, "ranges", &ranges_len); |
| if (!(*ranges_start) || !ranges_len) { |
| dev_warn(dev, |
| "missing or empty ranges property for device tree node '%s'\n", |
| mc_node->name); |
| |
| *num_ranges = 0; |
| return 0; |
| } |
| |
| *paddr_cells = of_n_addr_cells(mc_node); |
| |
| prop = of_get_property(mc_node, "#address-cells", NULL); |
| if (prop) |
| *mc_addr_cells = be32_to_cpup(prop); |
| else |
| *mc_addr_cells = *paddr_cells; |
| |
| prop = of_get_property(mc_node, "#size-cells", NULL); |
| if (prop) |
| *mc_size_cells = be32_to_cpup(prop); |
| else |
| *mc_size_cells = of_n_size_cells(mc_node); |
| |
| range_tuple_cell_count = *paddr_cells + *mc_addr_cells + |
| *mc_size_cells; |
| |
| tuple_len = range_tuple_cell_count * sizeof(__be32); |
| if (ranges_len % tuple_len != 0) { |
| dev_err(dev, "malformed ranges property '%s'\n", mc_node->name); |
| return -EINVAL; |
| } |
| |
| *num_ranges = ranges_len / tuple_len; |
| return 0; |
| } |
| |
| static int get_mc_addr_translation_ranges(struct device *dev, |
| struct fsl_mc_addr_translation_range |
| **ranges, |
| uint8_t *num_ranges) |
| { |
| int error; |
| int paddr_cells; |
| int mc_addr_cells; |
| int mc_size_cells; |
| int i; |
| const __be32 *ranges_start; |
| const __be32 *cell; |
| |
| error = parse_mc_ranges(dev, |
| &paddr_cells, |
| &mc_addr_cells, |
| &mc_size_cells, |
| &ranges_start, |
| num_ranges); |
| if (error < 0) |
| return error; |
| |
| if (!(*num_ranges)) { |
| /* |
| * Missing or empty ranges property ("ranges;") for the |
| * 'fsl,qoriq-mc' node. In this case, identity mapping |
| * will be used. |
| */ |
| *ranges = NULL; |
| return 0; |
| } |
| |
| *ranges = devm_kcalloc(dev, *num_ranges, |
| sizeof(struct fsl_mc_addr_translation_range), |
| GFP_KERNEL); |
| if (!(*ranges)) |
| return -ENOMEM; |
| |
| cell = ranges_start; |
| for (i = 0; i < *num_ranges; ++i) { |
| struct fsl_mc_addr_translation_range *range = &(*ranges)[i]; |
| |
| range->start_mc_addr = of_read_number(cell, mc_addr_cells); |
| cell += mc_addr_cells; |
| range->start_phys_addr = of_read_number(cell, paddr_cells); |
| cell += paddr_cells; |
| range->end_mc_addr = range->start_mc_addr + |
| of_read_number(cell, mc_size_cells); |
| |
| cell += mc_size_cells; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * fsl_mc_bus_probe - callback invoked when the root MC bus is being |
| * added |
| */ |
| static int fsl_mc_bus_probe(struct platform_device *pdev) |
| { |
| struct dprc_obj_desc obj_desc; |
| int error; |
| struct fsl_mc *mc; |
| struct fsl_mc_device *mc_bus_dev = NULL; |
| struct fsl_mc_io *mc_io = NULL; |
| int container_id; |
| phys_addr_t mc_portal_phys_addr; |
| uint32_t mc_portal_size; |
| struct mc_version mc_version; |
| struct resource res; |
| |
| dev_info(&pdev->dev, "Root MC bus device probed"); |
| |
| mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL); |
| if (!mc) |
| return -ENOMEM; |
| |
| platform_set_drvdata(pdev, mc); |
| |
| /* |
| * Get physical address of MC portal for the root DPRC: |
| */ |
| error = of_address_to_resource(pdev->dev.of_node, 0, &res); |
| if (error < 0) { |
| dev_err(&pdev->dev, |
| "of_address_to_resource() failed for %s\n", |
| pdev->dev.of_node->full_name); |
| return error; |
| } |
| |
| mc_portal_phys_addr = res.start; |
| mc_portal_size = resource_size(&res); |
| error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr, |
| mc_portal_size, NULL, 0, &mc_io); |
| if (error < 0) |
| return error; |
| |
| error = mc_get_version(mc_io, &mc_version); |
| if (error != 0) { |
| dev_err(&pdev->dev, |
| "mc_get_version() failed with error %d\n", error); |
| goto error_cleanup_mc_io; |
| } |
| |
| dev_info(&pdev->dev, |
| "Freescale Management Complex Firmware version: %u.%u.%u\n", |
| mc_version.major, mc_version.minor, mc_version.revision); |
| |
| if (mc_version.major < MC_VER_MAJOR) { |
| dev_err(&pdev->dev, |
| "ERROR: MC firmware version not supported by driver (driver version: %u.%u)\n", |
| MC_VER_MAJOR, MC_VER_MINOR); |
| error = -ENOTSUPP; |
| goto error_cleanup_mc_io; |
| } |
| |
| if (mc_version.major > MC_VER_MAJOR) { |
| dev_warn(&pdev->dev, |
| "WARNING: driver may not support newer MC firmware features (driver version: %u.%u)\n", |
| MC_VER_MAJOR, MC_VER_MINOR); |
| } |
| |
| error = get_mc_addr_translation_ranges(&pdev->dev, |
| &mc->translation_ranges, |
| &mc->num_translation_ranges); |
| if (error < 0) |
| goto error_cleanup_mc_io; |
| |
| error = dpmng_get_container_id(mc_io, &container_id); |
| if (error < 0) { |
| dev_err(&pdev->dev, |
| "dpmng_get_container_id() failed: %d\n", error); |
| goto error_cleanup_mc_io; |
| } |
| |
| obj_desc.vendor = FSL_MC_VENDOR_FREESCALE; |
| strcpy(obj_desc.type, "dprc"); |
| obj_desc.id = container_id; |
| obj_desc.ver_major = DPRC_VER_MAJOR; |
| obj_desc.ver_minor = DPRC_VER_MINOR; |
| obj_desc.region_count = 0; |
| |
| error = fsl_mc_device_add(&obj_desc, mc_io, &pdev->dev, &mc_bus_dev); |
| if (error < 0) |
| goto error_cleanup_mc_io; |
| |
| mc->root_mc_bus_dev = mc_bus_dev; |
| return 0; |
| |
| error_cleanup_mc_io: |
| fsl_destroy_mc_io(mc_io); |
| return error; |
| } |
| |
| /** |
| * fsl_mc_bus_remove - callback invoked when the root MC bus is being |
| * removed |
| */ |
| static int fsl_mc_bus_remove(struct platform_device *pdev) |
| { |
| struct fsl_mc *mc = platform_get_drvdata(pdev); |
| |
| if (WARN_ON(&mc->root_mc_bus_dev->dev != fsl_mc_bus_type.dev_root)) |
| return -EINVAL; |
| |
| fsl_mc_device_remove(mc->root_mc_bus_dev); |
| dev_info(&pdev->dev, "Root MC bus device removed"); |
| return 0; |
| } |
| |
| static const struct of_device_id fsl_mc_bus_match_table[] = { |
| {.compatible = "fsl,qoriq-mc",}, |
| {}, |
| }; |
| |
| MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table); |
| |
| static struct platform_driver fsl_mc_bus_driver = { |
| .driver = { |
| .name = "fsl_mc_bus", |
| .owner = THIS_MODULE, |
| .pm = NULL, |
| .of_match_table = fsl_mc_bus_match_table, |
| }, |
| .probe = fsl_mc_bus_probe, |
| .remove = fsl_mc_bus_remove, |
| }; |
| |
| static int __init fsl_mc_bus_driver_init(void) |
| { |
| int error; |
| |
| mc_dev_cache = kmem_cache_create("fsl_mc_device", |
| sizeof(struct fsl_mc_device), 0, 0, |
| NULL); |
| if (!mc_dev_cache) { |
| pr_err("Could not create fsl_mc_device cache\n"); |
| return -ENOMEM; |
| } |
| |
| error = bus_register(&fsl_mc_bus_type); |
| if (error < 0) { |
| pr_err("fsl-mc bus type registration failed: %d\n", error); |
| goto error_cleanup_cache; |
| } |
| |
| pr_info("fsl-mc bus type registered\n"); |
| |
| error = platform_driver_register(&fsl_mc_bus_driver); |
| if (error < 0) { |
| pr_err("platform_driver_register() failed: %d\n", error); |
| goto error_cleanup_bus; |
| } |
| |
| error = dprc_driver_init(); |
| if (error < 0) |
| goto error_cleanup_driver; |
| |
| return 0; |
| |
| error_cleanup_driver: |
| platform_driver_unregister(&fsl_mc_bus_driver); |
| |
| error_cleanup_bus: |
| bus_unregister(&fsl_mc_bus_type); |
| |
| error_cleanup_cache: |
| kmem_cache_destroy(mc_dev_cache); |
| return error; |
| } |
| |
| postcore_initcall(fsl_mc_bus_driver_init); |
| |
| static void __exit fsl_mc_bus_driver_exit(void) |
| { |
| if (WARN_ON(!mc_dev_cache)) |
| return; |
| |
| dprc_driver_exit(); |
| platform_driver_unregister(&fsl_mc_bus_driver); |
| bus_unregister(&fsl_mc_bus_type); |
| kmem_cache_destroy(mc_dev_cache); |
| pr_info("MC bus unregistered\n"); |
| } |
| |
| module_exit(fsl_mc_bus_driver_exit); |
| |
| MODULE_AUTHOR("Freescale Semiconductor Inc."); |
| MODULE_DESCRIPTION("Freescale Management Complex (MC) bus driver"); |
| MODULE_LICENSE("GPL"); |