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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include "bcma_private.h"#include <linux/module.h>#include <linux/mmc/sdio_func.h>#include <linux/platform_device.h>#include <linux/pci.h>#include <linux/bcma/bcma.h>#include <linux/slab.h>#include <linux/of_address.h>#include <linux/of_irq.h>#include <linux/of_device.h>#include <linux/of_platform.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;
/* bcma_buses_mutex locks the bcma_bus_next_num */static DEFINE_MUTEX(bcma_buses_mutex);
static int bcma_bus_match(struct device *dev, const struct device_driver *drv);static int bcma_device_probe(struct device *dev);static void bcma_device_remove(struct device *dev);static int bcma_device_uevent(const 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 DEVICE_ATTR_RO(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 DEVICE_ATTR_RO(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 DEVICE_ATTR_RO(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 DEVICE_ATTR_RO(class);
static struct attribute *bcma_device_attrs[] = { &dev_attr_manuf.attr, &dev_attr_id.attr, &dev_attr_rev.attr, &dev_attr_class.attr, NULL,};ATTRIBUTE_GROUPS(bcma_device);
static const 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_groups = bcma_device_groups,};
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_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;}EXPORT_SYMBOL_GPL(bcma_find_core_unit);
bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value, int timeout){ unsigned long deadline = jiffies + timeout; u32 val;
do { val = bcma_read32(core, reg); if ((val & mask) == value) return true; cpu_relax(); udelay(10); } while (!time_after_eq(jiffies, deadline));
bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
return false;}
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 bool bcma_is_core_needed_early(u16 core_id){ switch (core_id) { case BCMA_CORE_NS_NAND: case BCMA_CORE_NS_QSPI: return true; }
return false;}
static struct device_node *bcma_of_find_child_device(struct device *parent, struct bcma_device *core){ struct device_node *node; int ret;
if (!parent->of_node) return NULL;
for_each_child_of_node(parent->of_node, node) { struct resource res; ret = of_address_to_resource(node, 0, &res); if (ret) continue; if (res.start == core->addr) return node; } return NULL;}
static int bcma_of_irq_parse(struct device *parent, struct bcma_device *core, struct of_phandle_args *out_irq, int num){ __be32 laddr[1]; int rc;
if (core->dev.of_node) { rc = of_irq_parse_one(core->dev.of_node, num, out_irq); if (!rc) return rc; }
out_irq->np = parent->of_node; out_irq->args_count = 1; out_irq->args[0] = num;
laddr[0] = cpu_to_be32(core->addr); return of_irq_parse_raw(laddr, out_irq);}
static unsigned int bcma_of_get_irq(struct device *parent, struct bcma_device *core, int num){ struct of_phandle_args out_irq; int ret;
if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent->of_node) return 0;
ret = bcma_of_irq_parse(parent, core, &out_irq, num); if (ret) { bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n", ret); return 0; }
return irq_create_of_mapping(&out_irq);}
static void bcma_of_fill_device(struct device *parent, struct bcma_device *core){ struct device_node *node;
node = bcma_of_find_child_device(parent, core); if (node) core->dev.of_node = node;
core->irq = bcma_of_get_irq(parent, core, 0);
of_dma_configure(&core->dev, node, false);}
unsigned int bcma_core_irq(struct bcma_device *core, int num){ struct bcma_bus *bus = core->bus; unsigned int mips_irq;
switch (bus->hosttype) { case BCMA_HOSTTYPE_PCI: return bus->host_pci->irq; case BCMA_HOSTTYPE_SOC: if (bus->drv_mips.core && num == 0) { mips_irq = bcma_core_mips_irq(core); return mips_irq <= 4 ? mips_irq + 2 : 0; } if (bus->dev) return bcma_of_get_irq(bus->dev, core, num); return 0; case BCMA_HOSTTYPE_SDIO: return 0; }
return 0;}EXPORT_SYMBOL(bcma_core_irq);
void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core){ device_initialize(&core->dev); core->dev.release = bcma_release_core_dev; core->dev.bus = &bcma_bus_type; dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index); core->dev.parent = bus->dev; if (bus->dev) bcma_of_fill_device(bus->dev, core);
switch (bus->hosttype) { case BCMA_HOSTTYPE_PCI: core->dma_dev = bus->dev; core->irq = bus->host_pci->irq; break; case BCMA_HOSTTYPE_SOC: if (IS_ENABLED(CONFIG_OF) && bus->dev) { core->dma_dev = bus->dev; } else { core->dev.dma_mask = &core->dev.coherent_dma_mask; core->dma_dev = &core->dev; } break; case BCMA_HOSTTYPE_SDIO: break; }}
void bcma_init_bus(struct bcma_bus *bus){ mutex_lock(&bcma_buses_mutex); bus->num = bcma_bus_next_num++; mutex_unlock(&bcma_buses_mutex);
INIT_LIST_HEAD(&bus->cores); bus->nr_cores = 0;
bcma_detect_chip(bus);}
static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core){ int err;
err = device_add(&core->dev); if (err) { bcma_err(bus, "Could not register dev for core 0x%03X\n", core->id.id); return; } core->dev_registered = true;}
static int bcma_register_devices(struct bcma_bus *bus){ struct bcma_device *core; int err;
list_for_each_entry(core, &bus->cores, list) { struct device_node *np;
/* We support that core ourselves */ switch (core->id.id) { case BCMA_CORE_4706_CHIPCOMMON: case BCMA_CORE_CHIPCOMMON: case BCMA_CORE_NS_CHIPCOMMON_B: case BCMA_CORE_PCI: case BCMA_CORE_PCIE: case BCMA_CORE_PCIE2: case BCMA_CORE_MIPS_74K: case BCMA_CORE_4706_MAC_GBIT_COMMON: continue; }
/* Early cores were already registered */ if (bcma_is_core_needed_early(core->id.id)) continue;
np = core->dev.of_node; if (np && !of_device_is_available(np)) 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;
bcma_register_core(bus, core); }
#ifdef CONFIG_BCMA_PFLASH 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); return 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;}
void bcma_unregister_cores(struct bcma_bus *bus){ struct bcma_device *core, *tmp;
list_for_each_entry_safe(core, tmp, &bus->cores, list) { if (!core->dev_registered) continue; list_del(&core->list); device_unregister(&core->dev); } if (bus->hosttype == BCMA_HOSTTYPE_SOC) platform_device_unregister(bus->drv_cc.watchdog);
/* Now no one uses internally-handled cores, we can free them */ list_for_each_entry_safe(core, tmp, &bus->cores, list) { list_del(&core->list); put_device(&core->dev); }}
int bcma_bus_register(struct bcma_bus *bus){ int err; struct bcma_device *core;
/* Scan for devices (cores) */ err = bcma_bus_scan(bus); if (err) { bcma_err(bus, "Failed to scan: %d\n", err); return err; }
/* 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 PCIE core */ core = bcma_find_core(bus, BCMA_CORE_PCIE); if (core) { bus->drv_pci[0].core = core; bcma_core_pci_early_init(&bus->drv_pci[0]); }
if (bus->dev) of_platform_default_populate(bus->dev->of_node, NULL, bus->dev);
/* Cores providing flash access go before SPROM init */ list_for_each_entry(core, &bus->cores, list) { if (bcma_is_core_needed_early(core->id.id)) bcma_register_core(bus, core); }
/* 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 CC core */ core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B); if (core) { bus->drv_cc_b.core = core; bcma_core_chipcommon_b_init(&bus->drv_cc_b); }
/* 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 PCIe Gen 2 core */ core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0); if (core) { bus->drv_pcie2.core = core; bcma_core_pcie2_init(&bus->drv_pcie2); }
/* 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_devices(bus);
bcma_info(bus, "Bus registered\n");
return 0;}
void bcma_bus_unregister(struct bcma_bus *bus){ 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);
bcma_core_chipcommon_b_free(&bus->drv_cc_b);
bcma_unregister_cores(bus);}
/* * This is a special version of bus registration function designed for SoCs. * It scans bus and performs basic initialization of main cores only. * Please note it requires memory allocation, however it won't try to sleep. */int __init bcma_bus_early_register(struct bcma_bus *bus){ int err; struct bcma_device *core;
/* Scan for devices (cores) */ err = bcma_bus_scan(bus); if (err) { bcma_err(bus, "Failed to scan bus: %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_PMint 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, const struct device_driver *drv){ struct bcma_device *core = container_of(dev, struct bcma_device, dev); const struct bcma_driver *adrv = container_of_const(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;
get_device(dev); if (adrv->probe) err = adrv->probe(core); if (err) put_device(dev);
return err;}
static void 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); put_device(dev);}
static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env){ const struct bcma_device *core = container_of_const(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 unsigned int bcma_bus_registered;
/* * If built-in, bus has to be registered early, before any driver calls * bcma_driver_register. * Otherwise registering driver would trigger BUG in driver_register. */static int __init bcma_init_bus_register(void){ int err;
if (bcma_bus_registered) return 0;
err = bus_register(&bcma_bus_type); if (!err) bcma_bus_registered = 1;
return err;}#ifndef MODULEfs_initcall(bcma_init_bus_register);#endif
/* Main initialization has to be done with SPI/mtd/NAND/SPROM available */static int __init bcma_modinit(void){ int err;
err = bcma_init_bus_register(); if (err) return err;
err = bcma_host_soc_register_driver(); if (err) { pr_err("SoC host initialization failed\n"); err = 0; }#ifdef CONFIG_BCMA_HOST_PCI err = bcma_host_pci_init(); if (err) { pr_err("PCI host initialization failed\n"); err = 0; }#endif
return err;}module_init(bcma_modinit);
static void __exit bcma_modexit(void){#ifdef CONFIG_BCMA_HOST_PCI bcma_host_pci_exit();#endif bcma_host_soc_unregister_driver(); bus_unregister(&bcma_bus_type);}module_exit(bcma_modexit)