--- zzzz-none-000/linux-3.10.107/drivers/bcma/main.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/bcma/main.c 2021-02-04 17:41:59.000000000 +0000 @@ -7,9 +7,14 @@ #include "bcma_private.h" #include +#include #include +#include #include #include +#include +#include +#include MODULE_DESCRIPTION("Broadcom's specific AMBA driver"); MODULE_LICENSE("GPL"); @@ -30,28 +35,37 @@ 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 struct device_attribute bcma_device_attrs[] = { - __ATTR_RO(manuf), - __ATTR_RO(id), - __ATTR_RO(rev), - __ATTR_RO(class), - __ATTR_NULL, +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 struct bus_type bcma_bus_type = { .name = "bcma", @@ -59,7 +73,7 @@ .probe = bcma_device_probe, .remove = bcma_device_remove, .uevent = bcma_device_uevent, - .dev_attrs = bcma_device_attrs, + .dev_groups = bcma_device_groups, }; static u16 bcma_cc_core_id(struct bcma_bus *bus) @@ -69,28 +83,36 @@ return BCMA_CORE_CHIPCOMMON; } -struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid) +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) + if (core->id.id == coreid && core->core_unit == unit) return core; } return NULL; } -EXPORT_SYMBOL_GPL(bcma_find_core); +EXPORT_SYMBOL_GPL(bcma_find_core_unit); -struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid, - u8 unit) +bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value, + int timeout) { - struct bcma_device *core; + unsigned long deadline = jiffies + timeout; + u32 val; - list_for_each_entry(core, &bus->cores, list) { - if (core->id.id == coreid && core->core_unit == unit) - return core; - } - return NULL; + 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) @@ -103,55 +125,229 @@ kfree(core); } -static int bcma_register_cores(struct bcma_bus *bus) +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; +} + +#if defined(CONFIG_OF) && defined(CONFIG_OF_ADDRESS) +static struct device_node *bcma_of_find_child_device(struct platform_device *parent, + struct bcma_device *core) +{ + struct device_node *node; + u64 size; + const __be32 *reg; + + if (!parent || !parent->dev.of_node) + return NULL; + + for_each_child_of_node(parent->dev.of_node, node) { + reg = of_get_address(node, 0, &size, NULL); + if (!reg) + continue; + if (of_translate_address(node, reg) == core->addr) + return node; + } + return NULL; +} + +static int bcma_of_irq_parse(struct platform_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->dev.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 platform_device *parent, + struct bcma_device *core, int num) +{ + struct of_phandle_args out_irq; + int ret; + + if (!parent || !parent->dev.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 platform_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); +} +#else +static void bcma_of_fill_device(struct platform_device *parent, + struct bcma_device *core) +{ +} +static inline unsigned int bcma_of_get_irq(struct platform_device *parent, + struct bcma_device *core, int num) +{ + return 0; +} +#endif /* CONFIG_OF */ + +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->host_pdev) + return bcma_of_get_irq(bus->host_pdev, 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) +{ + 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); + + 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; + if (bus->host_pdev) { + core->dma_dev = &bus->host_pdev->dev; + core->dev.parent = &bus->host_pdev->dev; + bcma_of_fill_device(bus->host_pdev, core); + } else { + core->dma_dev = &core->dev; + } + break; + case BCMA_HOSTTYPE_SDIO: + break; + } +} + +struct device *bcma_bus_get_host_dev(struct bcma_bus *bus) +{ + switch (bus->hosttype) { + case BCMA_HOSTTYPE_PCI: + if (bus->host_pci) + return &bus->host_pci->dev; + else + return NULL; + case BCMA_HOSTTYPE_SOC: + if (bus->host_pdev) + return &bus->host_pdev->dev; + else + return NULL; + case BCMA_HOSTTYPE_SDIO: + if (bus->host_sdio) + return &bus->host_sdio->dev; + else + return NULL; + } + return NULL; +} + +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_register(&core->dev); + if (err) { + bcma_err(bus, "Could not register dev for core 0x%03X\n", + core->id.id); + put_device(&core->dev); + return; + } + core->dev_registered = true; +} + +static int bcma_register_devices(struct bcma_bus *bus) { struct bcma_device *core; - int err, dev_id = 0; + int err; 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_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; + /* 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++; + bcma_register_core(bus, core); } #ifdef CONFIG_BCMA_DRIVER_MIPS @@ -192,33 +388,37 @@ return 0; } -static void bcma_unregister_cores(struct bcma_bus *bus) +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); - if (core->dev_registered) - device_unregister(&core->dev); + device_unregister(&core->dev); } if (bus->hosttype == BCMA_HOSTTYPE_SOC) platform_device_unregister(bus->drv_cc.watchdog); + + /* Now noone uses internally-handled cores, we can free them */ + list_for_each_entry_safe(core, tmp, &bus->cores, list) { + list_del(&core->list); + kfree(core); + } } 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); + struct device *dev; /* Scan for devices (cores) */ err = bcma_bus_scan(bus); if (err) { bcma_err(bus, "Failed to scan: %d\n", err); - return -1; + return err; } /* Early init CC core */ @@ -228,6 +428,24 @@ 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]); + } + + dev = bcma_bus_get_host_dev(bus); + if (dev) { + of_platform_default_populate(dev->of_node, NULL, 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) { @@ -242,6 +460,13 @@ 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) { @@ -263,6 +488,13 @@ 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) { @@ -271,7 +503,7 @@ } /* Register found cores */ - bcma_register_cores(bus); + bcma_register_devices(bus); bcma_info(bus, "Bus registered\n"); @@ -280,7 +512,6 @@ void bcma_bus_unregister(struct bcma_bus *bus) { - struct bcma_device *cores[3]; int err; err = bcma_gpio_unregister(&bus->drv_cc); @@ -289,48 +520,25 @@ 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_core_chipcommon_b_free(&bus->drv_cc_b); 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) +/* + * 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; - 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); + /* Scan for devices (cores) */ + err = bcma_bus_scan(bus); if (err) { - bcma_err(bus, "Failed to scan for mips core: %d\n", err); + bcma_err(bus, "Failed to scan bus: %d\n", err); return -1; } @@ -464,14 +672,44 @@ core->id.rev, core->id.class); } -static int __init bcma_modinit(void) +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 MODULE +fs_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) { @@ -482,13 +720,14 @@ return err; } -fs_initcall(bcma_modinit); +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)