--- /dev/null
+/*
+ * 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>
+#include <linux/of_address.h>
+#include <linux/of_irq.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 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 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;
+}
+
+#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;
+ }
+}
+
+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;
+
+ 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;
+
+ bcma_register_core(bus, core);
+ }
+
+#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;
+}
+
+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 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;
+
+ /* 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]);
+ }
+
+ /* 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_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;
+
+ 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;
+}
+fs_initcall(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)
Code Review / kvmfornfv.git / blobdiff