/* * Broadcom specific AMBA * Bus subsystem * * Licensed under the GNU/GPL. See COPYING for details. */ #include "bcma_private.h" #include <linux/module.h> #include <linux/platform_device.h> #include <linux/bcma/bcma.h> #include <linux/slab.h> MODULE_DESCRIPTION("Broadcom's specific AMBA driver"); MODULE_LICENSE("GPL"); /* contains the number the next bus should get. */ static unsigned int bcma_bus_next_num = 0; /* bcma_buses_mutex locks the bcma_bus_next_num */ static DEFINE_MUTEX(bcma_buses_mutex); static int bcma_bus_match(struct device *dev, struct device_driver *drv); static int bcma_device_probe(struct device *dev); static int bcma_device_remove(struct device *dev); static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env); static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); return sprintf(buf, "0x%03X\n", core->id.manuf); } static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); return sprintf(buf, "0x%03X\n", core->id.id); } static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); return sprintf(buf, "0x%02X\n", core->id.rev); } static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); return sprintf(buf, "0x%X\n", core->id.class); } static struct device_attribute bcma_device_attrs[] = { __ATTR_RO(manuf), __ATTR_RO(id), __ATTR_RO(rev), __ATTR_RO(class), __ATTR_NULL, }; static struct bus_type bcma_bus_type = { .name = "bcma", .match = bcma_bus_match, .probe = bcma_device_probe, .remove = bcma_device_remove, .uevent = bcma_device_uevent, .dev_attrs = bcma_device_attrs, }; static u16 bcma_cc_core_id(struct bcma_bus *bus) { if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) return BCMA_CORE_4706_CHIPCOMMON; return BCMA_CORE_CHIPCOMMON; } struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid) { struct bcma_device *core; list_for_each_entry(core, &bus->cores, list) { if (core->id.id == coreid) return core; } return NULL; } EXPORT_SYMBOL_GPL(bcma_find_core); struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid, u8 unit) { struct bcma_device *core; list_for_each_entry(core, &bus->cores, list) { if (core->id.id == coreid && core->core_unit == unit) return core; } return NULL; } static void bcma_release_core_dev(struct device *dev) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); if (core->io_addr) iounmap(core->io_addr); if (core->io_wrap) iounmap(core->io_wrap); kfree(core); } static int bcma_register_cores(struct bcma_bus *bus) { struct bcma_device *core; int err, dev_id = 0; list_for_each_entry(core, &bus->cores, list) { /* We support that cores ourself */ switch (core->id.id) { case BCMA_CORE_4706_CHIPCOMMON: case BCMA_CORE_CHIPCOMMON: case BCMA_CORE_PCI: case BCMA_CORE_PCIE: case BCMA_CORE_MIPS_74K: case BCMA_CORE_4706_MAC_GBIT_COMMON: continue; } /* Only first GMAC core on BCM4706 is connected and working */ if (core->id.id == BCMA_CORE_4706_MAC_GBIT && core->core_unit > 0) continue; core->dev.release = bcma_release_core_dev; core->dev.bus = &bcma_bus_type; dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); switch (bus->hosttype) { case BCMA_HOSTTYPE_PCI: core->dev.parent = &bus->host_pci->dev; core->dma_dev = &bus->host_pci->dev; core->irq = bus->host_pci->irq; break; case BCMA_HOSTTYPE_SOC: core->dev.dma_mask = &core->dev.coherent_dma_mask; core->dma_dev = &core->dev; break; case BCMA_HOSTTYPE_SDIO: break; } err = device_register(&core->dev); if (err) { bcma_err(bus, "Could not register dev for core 0x%03X\n", core->id.id); continue; } core->dev_registered = true; dev_id++; } #ifdef CONFIG_BCMA_DRIVER_MIPS if (bus->drv_cc.pflash.present) { err = platform_device_register(&bcma_pflash_dev); if (err) bcma_err(bus, "Error registering parallel flash\n"); } #endif #ifdef CONFIG_BCMA_SFLASH if (bus->drv_cc.sflash.present) { err = platform_device_register(&bcma_sflash_dev); if (err) bcma_err(bus, "Error registering serial flash\n"); } #endif #ifdef CONFIG_BCMA_NFLASH if (bus->drv_cc.nflash.present) { err = platform_device_register(&bcma_nflash_dev); if (err) bcma_err(bus, "Error registering NAND flash\n"); } #endif err = bcma_gpio_init(&bus->drv_cc); if (err == -ENOTSUPP) bcma_debug(bus, "GPIO driver not activated\n"); else if (err) bcma_err(bus, "Error registering GPIO driver: %i\n", err); if (bus->hosttype == BCMA_HOSTTYPE_SOC) { err = bcma_chipco_watchdog_register(&bus->drv_cc); if (err) bcma_err(bus, "Error registering watchdog driver\n"); } return 0; } static void bcma_unregister_cores(struct bcma_bus *bus) { struct bcma_device *core, *tmp; list_for_each_entry_safe(core, tmp, &bus->cores, list) { list_del(&core->list); if (core->dev_registered) device_unregister(&core->dev); } if (bus->hosttype == BCMA_HOSTTYPE_SOC) platform_device_unregister(bus->drv_cc.watchdog); } int bcma_bus_register(struct bcma_bus *bus) { int err; struct bcma_device *core; mutex_lock(&bcma_buses_mutex); bus->num = bcma_bus_next_num++; mutex_unlock(&bcma_buses_mutex); /* Scan for devices (cores) */ err = bcma_bus_scan(bus); if (err) { bcma_err(bus, "Failed to scan: %d\n", err); return -1; } /* Early init CC core */ core = bcma_find_core(bus, bcma_cc_core_id(bus)); if (core) { bus->drv_cc.core = core; bcma_core_chipcommon_early_init(&bus->drv_cc); } /* Try to get SPROM */ err = bcma_sprom_get(bus); if (err == -ENOENT) { bcma_err(bus, "No SPROM available\n"); } else if (err) bcma_err(bus, "Failed to get SPROM: %d\n", err); /* Init CC core */ core = bcma_find_core(bus, bcma_cc_core_id(bus)); if (core) { bus->drv_cc.core = core; bcma_core_chipcommon_init(&bus->drv_cc); } /* Init MIPS core */ core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); if (core) { bus->drv_mips.core = core; bcma_core_mips_init(&bus->drv_mips); } /* Init PCIE core */ core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0); if (core) { bus->drv_pci[0].core = core; bcma_core_pci_init(&bus->drv_pci[0]); } /* Init PCIE core */ core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1); if (core) { bus->drv_pci[1].core = core; bcma_core_pci_init(&bus->drv_pci[1]); } /* Init GBIT MAC COMMON core */ core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); if (core) { bus->drv_gmac_cmn.core = core; bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); } /* Register found cores */ bcma_register_cores(bus); bcma_info(bus, "Bus registered\n"); return 0; } void bcma_bus_unregister(struct bcma_bus *bus) { struct bcma_device *cores[3]; int err; err = bcma_gpio_unregister(&bus->drv_cc); if (err == -EBUSY) bcma_err(bus, "Some GPIOs are still in use.\n"); else if (err) bcma_err(bus, "Can not unregister GPIO driver: %i\n", err); cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); bcma_unregister_cores(bus); kfree(cores[2]); kfree(cores[1]); kfree(cores[0]); } int __init bcma_bus_early_register(struct bcma_bus *bus, struct bcma_device *core_cc, struct bcma_device *core_mips) { int err; struct bcma_device *core; struct bcma_device_id match; bcma_init_bus(bus); match.manuf = BCMA_MANUF_BCM; match.id = bcma_cc_core_id(bus); match.class = BCMA_CL_SIM; match.rev = BCMA_ANY_REV; /* Scan for chip common core */ err = bcma_bus_scan_early(bus, &match, core_cc); if (err) { bcma_err(bus, "Failed to scan for common core: %d\n", err); return -1; } match.manuf = BCMA_MANUF_MIPS; match.id = BCMA_CORE_MIPS_74K; match.class = BCMA_CL_SIM; match.rev = BCMA_ANY_REV; /* Scan for mips core */ err = bcma_bus_scan_early(bus, &match, core_mips); if (err) { bcma_err(bus, "Failed to scan for mips core: %d\n", err); return -1; } /* Early init CC core */ core = bcma_find_core(bus, bcma_cc_core_id(bus)); if (core) { bus->drv_cc.core = core; bcma_core_chipcommon_early_init(&bus->drv_cc); } /* Early init MIPS core */ core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); if (core) { bus->drv_mips.core = core; bcma_core_mips_early_init(&bus->drv_mips); } bcma_info(bus, "Early bus registered\n"); return 0; } #ifdef CONFIG_PM int bcma_bus_suspend(struct bcma_bus *bus) { struct bcma_device *core; list_for_each_entry(core, &bus->cores, list) { struct device_driver *drv = core->dev.driver; if (drv) { struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); if (adrv->suspend) adrv->suspend(core); } } return 0; } int bcma_bus_resume(struct bcma_bus *bus) { struct bcma_device *core; /* Init CC core */ if (bus->drv_cc.core) { bus->drv_cc.setup_done = false; bcma_core_chipcommon_init(&bus->drv_cc); } list_for_each_entry(core, &bus->cores, list) { struct device_driver *drv = core->dev.driver; if (drv) { struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); if (adrv->resume) adrv->resume(core); } } return 0; } #endif int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) { drv->drv.name = drv->name; drv->drv.bus = &bcma_bus_type; drv->drv.owner = owner; return driver_register(&drv->drv); } EXPORT_SYMBOL_GPL(__bcma_driver_register); void bcma_driver_unregister(struct bcma_driver *drv) { driver_unregister(&drv->drv); } EXPORT_SYMBOL_GPL(bcma_driver_unregister); static int bcma_bus_match(struct device *dev, struct device_driver *drv) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); const struct bcma_device_id *cid = &core->id; const struct bcma_device_id *did; for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && (did->id == cid->id || did->id == BCMA_ANY_ID) && (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && (did->class == cid->class || did->class == BCMA_ANY_CLASS)) return 1; } return 0; } static int bcma_device_probe(struct device *dev) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, drv); int err = 0; if (adrv->probe) err = adrv->probe(core); return err; } static int bcma_device_remove(struct device *dev) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, drv); if (adrv->remove) adrv->remove(core); return 0; } static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) { struct bcma_device *core = container_of(dev, struct bcma_device, dev); return add_uevent_var(env, "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", core->id.manuf, core->id.id, core->id.rev, core->id.class); } static int __init bcma_modinit(void) { int err; err = bus_register(&bcma_bus_type); if (err) return err; #ifdef CONFIG_BCMA_HOST_PCI err = bcma_host_pci_init(); if (err) { pr_err("PCI host initialization failed\n"); err = 0; } #endif return err; } fs_initcall(bcma_modinit); static void __exit bcma_modexit(void) { #ifdef CONFIG_BCMA_HOST_PCI bcma_host_pci_exit(); #endif bus_unregister(&bcma_bus_type); } module_exit(bcma_modexit)