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698 lines
16 KiB
698 lines
16 KiB
/* |
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* Broadcom specific AMBA |
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* Bus subsystem |
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* |
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* Licensed under the GNU/GPL. See COPYING for details. |
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*/ |
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|
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#include "bcma_private.h" |
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#include <linux/module.h> |
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#include <linux/mmc/sdio_func.h> |
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#include <linux/platform_device.h> |
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#include <linux/pci.h> |
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#include <linux/bcma/bcma.h> |
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#include <linux/slab.h> |
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#include <linux/of_address.h> |
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#include <linux/of_irq.h> |
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#include <linux/of_platform.h> |
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MODULE_DESCRIPTION("Broadcom's specific AMBA driver"); |
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MODULE_LICENSE("GPL"); |
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/* contains the number the next bus should get. */ |
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static unsigned int bcma_bus_next_num = 0; |
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/* bcma_buses_mutex locks the bcma_bus_next_num */ |
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static DEFINE_MUTEX(bcma_buses_mutex); |
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static int bcma_bus_match(struct device *dev, struct device_driver *drv); |
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static int bcma_device_probe(struct device *dev); |
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static int bcma_device_remove(struct device *dev); |
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static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env); |
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static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct bcma_device *core = container_of(dev, struct bcma_device, dev); |
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return sprintf(buf, "0x%03X\n", core->id.manuf); |
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} |
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static DEVICE_ATTR_RO(manuf); |
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static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct bcma_device *core = container_of(dev, struct bcma_device, dev); |
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return sprintf(buf, "0x%03X\n", core->id.id); |
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} |
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static DEVICE_ATTR_RO(id); |
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static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct bcma_device *core = container_of(dev, struct bcma_device, dev); |
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return sprintf(buf, "0x%02X\n", core->id.rev); |
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} |
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static DEVICE_ATTR_RO(rev); |
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static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct bcma_device *core = container_of(dev, struct bcma_device, dev); |
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return sprintf(buf, "0x%X\n", core->id.class); |
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} |
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static DEVICE_ATTR_RO(class); |
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static struct attribute *bcma_device_attrs[] = { |
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&dev_attr_manuf.attr, |
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&dev_attr_id.attr, |
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&dev_attr_rev.attr, |
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&dev_attr_class.attr, |
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NULL, |
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}; |
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ATTRIBUTE_GROUPS(bcma_device); |
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static struct bus_type bcma_bus_type = { |
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.name = "bcma", |
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.match = bcma_bus_match, |
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.probe = bcma_device_probe, |
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.remove = bcma_device_remove, |
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.uevent = bcma_device_uevent, |
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.dev_groups = bcma_device_groups, |
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}; |
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static u16 bcma_cc_core_id(struct bcma_bus *bus) |
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{ |
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if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) |
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return BCMA_CORE_4706_CHIPCOMMON; |
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return BCMA_CORE_CHIPCOMMON; |
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} |
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struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid, |
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u8 unit) |
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{ |
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struct bcma_device *core; |
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list_for_each_entry(core, &bus->cores, list) { |
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if (core->id.id == coreid && core->core_unit == unit) |
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return core; |
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} |
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return NULL; |
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} |
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EXPORT_SYMBOL_GPL(bcma_find_core_unit); |
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bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value, |
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int timeout) |
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{ |
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unsigned long deadline = jiffies + timeout; |
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u32 val; |
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do { |
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val = bcma_read32(core, reg); |
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if ((val & mask) == value) |
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return true; |
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cpu_relax(); |
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udelay(10); |
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} while (!time_after_eq(jiffies, deadline)); |
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bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg); |
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return false; |
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} |
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static void bcma_release_core_dev(struct device *dev) |
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{ |
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struct bcma_device *core = container_of(dev, struct bcma_device, dev); |
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if (core->io_addr) |
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iounmap(core->io_addr); |
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if (core->io_wrap) |
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iounmap(core->io_wrap); |
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kfree(core); |
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} |
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static bool bcma_is_core_needed_early(u16 core_id) |
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{ |
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switch (core_id) { |
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case BCMA_CORE_NS_NAND: |
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case BCMA_CORE_NS_QSPI: |
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return true; |
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} |
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return false; |
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} |
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static struct device_node *bcma_of_find_child_device(struct device *parent, |
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struct bcma_device *core) |
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{ |
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struct device_node *node; |
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u64 size; |
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const __be32 *reg; |
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if (!parent->of_node) |
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return NULL; |
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for_each_child_of_node(parent->of_node, node) { |
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reg = of_get_address(node, 0, &size, NULL); |
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if (!reg) |
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continue; |
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if (of_translate_address(node, reg) == core->addr) |
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return node; |
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} |
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return NULL; |
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} |
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static int bcma_of_irq_parse(struct device *parent, |
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struct bcma_device *core, |
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struct of_phandle_args *out_irq, int num) |
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{ |
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__be32 laddr[1]; |
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int rc; |
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if (core->dev.of_node) { |
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rc = of_irq_parse_one(core->dev.of_node, num, out_irq); |
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if (!rc) |
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return rc; |
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} |
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out_irq->np = parent->of_node; |
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out_irq->args_count = 1; |
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out_irq->args[0] = num; |
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laddr[0] = cpu_to_be32(core->addr); |
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return of_irq_parse_raw(laddr, out_irq); |
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} |
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static unsigned int bcma_of_get_irq(struct device *parent, |
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struct bcma_device *core, int num) |
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{ |
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struct of_phandle_args out_irq; |
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int ret; |
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if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent->of_node) |
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return 0; |
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ret = bcma_of_irq_parse(parent, core, &out_irq, num); |
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if (ret) { |
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bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n", |
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ret); |
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return 0; |
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} |
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return irq_create_of_mapping(&out_irq); |
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} |
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static void bcma_of_fill_device(struct device *parent, |
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struct bcma_device *core) |
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{ |
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struct device_node *node; |
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node = bcma_of_find_child_device(parent, core); |
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if (node) |
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core->dev.of_node = node; |
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core->irq = bcma_of_get_irq(parent, core, 0); |
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of_dma_configure(&core->dev, node, false); |
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} |
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unsigned int bcma_core_irq(struct bcma_device *core, int num) |
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{ |
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struct bcma_bus *bus = core->bus; |
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unsigned int mips_irq; |
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switch (bus->hosttype) { |
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case BCMA_HOSTTYPE_PCI: |
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return bus->host_pci->irq; |
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case BCMA_HOSTTYPE_SOC: |
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if (bus->drv_mips.core && num == 0) { |
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mips_irq = bcma_core_mips_irq(core); |
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return mips_irq <= 4 ? mips_irq + 2 : 0; |
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} |
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if (bus->dev) |
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return bcma_of_get_irq(bus->dev, core, num); |
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return 0; |
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case BCMA_HOSTTYPE_SDIO: |
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return 0; |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL(bcma_core_irq); |
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void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core) |
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{ |
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core->dev.release = bcma_release_core_dev; |
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core->dev.bus = &bcma_bus_type; |
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dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index); |
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core->dev.parent = bus->dev; |
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if (bus->dev) |
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bcma_of_fill_device(bus->dev, core); |
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switch (bus->hosttype) { |
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case BCMA_HOSTTYPE_PCI: |
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core->dma_dev = bus->dev; |
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core->irq = bus->host_pci->irq; |
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break; |
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case BCMA_HOSTTYPE_SOC: |
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if (IS_ENABLED(CONFIG_OF) && bus->dev) { |
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core->dma_dev = bus->dev; |
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} else { |
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core->dev.dma_mask = &core->dev.coherent_dma_mask; |
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core->dma_dev = &core->dev; |
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} |
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break; |
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case BCMA_HOSTTYPE_SDIO: |
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break; |
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} |
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} |
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void bcma_init_bus(struct bcma_bus *bus) |
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{ |
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mutex_lock(&bcma_buses_mutex); |
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bus->num = bcma_bus_next_num++; |
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mutex_unlock(&bcma_buses_mutex); |
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INIT_LIST_HEAD(&bus->cores); |
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bus->nr_cores = 0; |
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bcma_detect_chip(bus); |
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} |
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static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core) |
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{ |
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int err; |
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err = device_register(&core->dev); |
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if (err) { |
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bcma_err(bus, "Could not register dev for core 0x%03X\n", |
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core->id.id); |
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put_device(&core->dev); |
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return; |
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} |
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core->dev_registered = true; |
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} |
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static int bcma_register_devices(struct bcma_bus *bus) |
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{ |
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struct bcma_device *core; |
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int err; |
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list_for_each_entry(core, &bus->cores, list) { |
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/* We support that cores ourself */ |
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switch (core->id.id) { |
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case BCMA_CORE_4706_CHIPCOMMON: |
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case BCMA_CORE_CHIPCOMMON: |
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case BCMA_CORE_NS_CHIPCOMMON_B: |
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case BCMA_CORE_PCI: |
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case BCMA_CORE_PCIE: |
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case BCMA_CORE_PCIE2: |
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case BCMA_CORE_MIPS_74K: |
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case BCMA_CORE_4706_MAC_GBIT_COMMON: |
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continue; |
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} |
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/* Early cores were already registered */ |
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if (bcma_is_core_needed_early(core->id.id)) |
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continue; |
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/* Only first GMAC core on BCM4706 is connected and working */ |
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if (core->id.id == BCMA_CORE_4706_MAC_GBIT && |
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core->core_unit > 0) |
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continue; |
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bcma_register_core(bus, core); |
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} |
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#ifdef CONFIG_BCMA_PFLASH |
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if (bus->drv_cc.pflash.present) { |
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err = platform_device_register(&bcma_pflash_dev); |
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if (err) |
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bcma_err(bus, "Error registering parallel flash\n"); |
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} |
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#endif |
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#ifdef CONFIG_BCMA_SFLASH |
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if (bus->drv_cc.sflash.present) { |
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err = platform_device_register(&bcma_sflash_dev); |
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if (err) |
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bcma_err(bus, "Error registering serial flash\n"); |
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} |
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#endif |
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#ifdef CONFIG_BCMA_NFLASH |
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if (bus->drv_cc.nflash.present) { |
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err = platform_device_register(&bcma_nflash_dev); |
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if (err) |
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bcma_err(bus, "Error registering NAND flash\n"); |
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} |
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#endif |
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err = bcma_gpio_init(&bus->drv_cc); |
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if (err == -ENOTSUPP) |
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bcma_debug(bus, "GPIO driver not activated\n"); |
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else if (err) |
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bcma_err(bus, "Error registering GPIO driver: %i\n", err); |
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if (bus->hosttype == BCMA_HOSTTYPE_SOC) { |
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err = bcma_chipco_watchdog_register(&bus->drv_cc); |
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if (err) |
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bcma_err(bus, "Error registering watchdog driver\n"); |
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} |
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return 0; |
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} |
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void bcma_unregister_cores(struct bcma_bus *bus) |
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{ |
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struct bcma_device *core, *tmp; |
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list_for_each_entry_safe(core, tmp, &bus->cores, list) { |
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if (!core->dev_registered) |
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continue; |
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list_del(&core->list); |
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device_unregister(&core->dev); |
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} |
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if (bus->hosttype == BCMA_HOSTTYPE_SOC) |
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platform_device_unregister(bus->drv_cc.watchdog); |
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/* Now noone uses internally-handled cores, we can free them */ |
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list_for_each_entry_safe(core, tmp, &bus->cores, list) { |
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list_del(&core->list); |
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kfree(core); |
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} |
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} |
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int bcma_bus_register(struct bcma_bus *bus) |
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{ |
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int err; |
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struct bcma_device *core; |
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/* Scan for devices (cores) */ |
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err = bcma_bus_scan(bus); |
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if (err) { |
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bcma_err(bus, "Failed to scan: %d\n", err); |
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return err; |
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} |
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/* Early init CC core */ |
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core = bcma_find_core(bus, bcma_cc_core_id(bus)); |
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if (core) { |
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bus->drv_cc.core = core; |
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bcma_core_chipcommon_early_init(&bus->drv_cc); |
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} |
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/* Early init PCIE core */ |
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core = bcma_find_core(bus, BCMA_CORE_PCIE); |
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if (core) { |
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bus->drv_pci[0].core = core; |
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bcma_core_pci_early_init(&bus->drv_pci[0]); |
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} |
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if (bus->dev) |
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of_platform_default_populate(bus->dev->of_node, NULL, bus->dev); |
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/* Cores providing flash access go before SPROM init */ |
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list_for_each_entry(core, &bus->cores, list) { |
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if (bcma_is_core_needed_early(core->id.id)) |
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bcma_register_core(bus, core); |
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} |
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/* Try to get SPROM */ |
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err = bcma_sprom_get(bus); |
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if (err == -ENOENT) { |
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bcma_err(bus, "No SPROM available\n"); |
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} else if (err) |
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bcma_err(bus, "Failed to get SPROM: %d\n", err); |
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/* Init CC core */ |
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core = bcma_find_core(bus, bcma_cc_core_id(bus)); |
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if (core) { |
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bus->drv_cc.core = core; |
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bcma_core_chipcommon_init(&bus->drv_cc); |
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} |
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/* Init CC core */ |
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core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B); |
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if (core) { |
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bus->drv_cc_b.core = core; |
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bcma_core_chipcommon_b_init(&bus->drv_cc_b); |
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} |
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/* Init MIPS core */ |
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core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); |
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if (core) { |
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bus->drv_mips.core = core; |
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bcma_core_mips_init(&bus->drv_mips); |
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} |
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/* Init PCIE core */ |
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core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0); |
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if (core) { |
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bus->drv_pci[0].core = core; |
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bcma_core_pci_init(&bus->drv_pci[0]); |
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} |
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/* Init PCIE core */ |
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core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1); |
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if (core) { |
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bus->drv_pci[1].core = core; |
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bcma_core_pci_init(&bus->drv_pci[1]); |
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} |
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/* Init PCIe Gen 2 core */ |
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core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0); |
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if (core) { |
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bus->drv_pcie2.core = core; |
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bcma_core_pcie2_init(&bus->drv_pcie2); |
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} |
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/* Init GBIT MAC COMMON core */ |
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core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); |
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if (core) { |
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bus->drv_gmac_cmn.core = core; |
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bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); |
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} |
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/* Register found cores */ |
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bcma_register_devices(bus); |
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bcma_info(bus, "Bus registered\n"); |
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return 0; |
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} |
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void bcma_bus_unregister(struct bcma_bus *bus) |
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{ |
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int err; |
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err = bcma_gpio_unregister(&bus->drv_cc); |
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if (err == -EBUSY) |
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bcma_err(bus, "Some GPIOs are still in use.\n"); |
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else if (err) |
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bcma_err(bus, "Can not unregister GPIO driver: %i\n", err); |
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bcma_core_chipcommon_b_free(&bus->drv_cc_b); |
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bcma_unregister_cores(bus); |
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} |
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/* |
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* This is a special version of bus registration function designed for SoCs. |
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* It scans bus and performs basic initialization of main cores only. |
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* Please note it requires memory allocation, however it won't try to sleep. |
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*/ |
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int __init bcma_bus_early_register(struct bcma_bus *bus) |
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{ |
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int err; |
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struct bcma_device *core; |
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/* Scan for devices (cores) */ |
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err = bcma_bus_scan(bus); |
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if (err) { |
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bcma_err(bus, "Failed to scan bus: %d\n", err); |
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return -1; |
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} |
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/* Early init CC core */ |
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core = bcma_find_core(bus, bcma_cc_core_id(bus)); |
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if (core) { |
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bus->drv_cc.core = core; |
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bcma_core_chipcommon_early_init(&bus->drv_cc); |
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} |
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/* Early init MIPS core */ |
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core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); |
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if (core) { |
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bus->drv_mips.core = core; |
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bcma_core_mips_early_init(&bus->drv_mips); |
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} |
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bcma_info(bus, "Early bus registered\n"); |
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return 0; |
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} |
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#ifdef CONFIG_PM |
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int bcma_bus_suspend(struct bcma_bus *bus) |
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{ |
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struct bcma_device *core; |
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list_for_each_entry(core, &bus->cores, list) { |
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struct device_driver *drv = core->dev.driver; |
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if (drv) { |
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struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); |
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if (adrv->suspend) |
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adrv->suspend(core); |
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} |
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} |
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return 0; |
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} |
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int bcma_bus_resume(struct bcma_bus *bus) |
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{ |
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struct bcma_device *core; |
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/* Init CC core */ |
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if (bus->drv_cc.core) { |
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bus->drv_cc.setup_done = false; |
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bcma_core_chipcommon_init(&bus->drv_cc); |
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} |
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list_for_each_entry(core, &bus->cores, list) { |
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struct device_driver *drv = core->dev.driver; |
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if (drv) { |
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struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); |
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if (adrv->resume) |
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adrv->resume(core); |
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} |
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} |
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return 0; |
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} |
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#endif |
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int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) |
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{ |
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drv->drv.name = drv->name; |
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drv->drv.bus = &bcma_bus_type; |
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drv->drv.owner = owner; |
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return driver_register(&drv->drv); |
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} |
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EXPORT_SYMBOL_GPL(__bcma_driver_register); |
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void bcma_driver_unregister(struct bcma_driver *drv) |
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{ |
|
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; |
|
|
|
get_device(dev); |
|
if (adrv->probe) |
|
err = adrv->probe(core); |
|
if (err) |
|
put_device(dev); |
|
|
|
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); |
|
put_device(dev); |
|
|
|
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 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) { |
|
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)
|
|
|