510 lines
12 KiB
C
510 lines
12 KiB
C
/*
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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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#include "bcma_private.h"
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/bcma/bcma.h>
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#include <linux/slab.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 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 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 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 struct device_attribute bcma_device_attrs[] = {
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__ATTR_RO(manuf),
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__ATTR_RO(id),
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__ATTR_RO(rev),
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__ATTR_RO(class),
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__ATTR_NULL,
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};
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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_attrs = bcma_device_attrs,
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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(struct bcma_bus *bus, u16 coreid)
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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)
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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);
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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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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 int bcma_register_cores(struct bcma_bus *bus)
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{
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struct bcma_device *core;
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int err, dev_id = 0;
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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_PCI:
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case BCMA_CORE_PCIE:
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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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/* 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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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, dev_id);
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switch (bus->hosttype) {
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case BCMA_HOSTTYPE_PCI:
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core->dev.parent = &bus->host_pci->dev;
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core->dma_dev = &bus->host_pci->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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core->dev.dma_mask = &core->dev.coherent_dma_mask;
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core->dma_dev = &core->dev;
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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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err = device_register(&core->dev);
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if (err) {
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bcma_err(bus,
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"Could not register dev for core 0x%03X\n",
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core->id.id);
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continue;
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}
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core->dev_registered = true;
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dev_id++;
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}
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#ifdef CONFIG_BCMA_DRIVER_MIPS
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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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static 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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list_del(&core->list);
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if (core->dev_registered)
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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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}
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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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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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/* 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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/* 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 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 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_cores(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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struct bcma_device *cores[3];
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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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cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
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cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
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cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
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bcma_unregister_cores(bus);
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kfree(cores[2]);
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kfree(cores[1]);
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kfree(cores[0]);
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}
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int __init bcma_bus_early_register(struct bcma_bus *bus,
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struct bcma_device *core_cc,
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struct bcma_device *core_mips)
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{
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int err;
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struct bcma_device *core;
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struct bcma_device_id match;
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bcma_init_bus(bus);
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match.manuf = BCMA_MANUF_BCM;
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match.id = bcma_cc_core_id(bus);
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match.class = BCMA_CL_SIM;
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match.rev = BCMA_ANY_REV;
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/* Scan for chip common core */
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err = bcma_bus_scan_early(bus, &match, core_cc);
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if (err) {
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bcma_err(bus, "Failed to scan for common core: %d\n", err);
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return -1;
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}
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match.manuf = BCMA_MANUF_MIPS;
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match.id = BCMA_CORE_MIPS_74K;
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match.class = BCMA_CL_SIM;
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match.rev = BCMA_ANY_REV;
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/* Scan for mips core */
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err = bcma_bus_scan_early(bus, &match, core_mips);
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if (err) {
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bcma_err(bus, "Failed to scan for mips core: %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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{
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driver_unregister(&drv->drv);
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}
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EXPORT_SYMBOL_GPL(bcma_driver_unregister);
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static int bcma_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct bcma_device *core = container_of(dev, struct bcma_device, dev);
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struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
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const struct bcma_device_id *cid = &core->id;
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const struct bcma_device_id *did;
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for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
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if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
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(did->id == cid->id || did->id == BCMA_ANY_ID) &&
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(did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
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(did->class == cid->class || did->class == BCMA_ANY_CLASS))
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return 1;
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}
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return 0;
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}
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static int bcma_device_probe(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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struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
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drv);
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int err = 0;
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if (adrv->probe)
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err = adrv->probe(core);
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return err;
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}
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static int bcma_device_remove(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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struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
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drv);
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if (adrv->remove)
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adrv->remove(core);
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return 0;
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}
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static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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struct bcma_device *core = container_of(dev, struct bcma_device, dev);
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return add_uevent_var(env,
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"MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
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core->id.manuf, core->id.id,
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core->id.rev, core->id.class);
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}
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static int __init bcma_modinit(void)
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{
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int err;
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err = bus_register(&bcma_bus_type);
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if (err)
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return err;
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#ifdef CONFIG_BCMA_HOST_PCI
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err = bcma_host_pci_init();
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if (err) {
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pr_err("PCI host initialization failed\n");
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err = 0;
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}
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#endif
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return err;
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}
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fs_initcall(bcma_modinit);
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static void __exit bcma_modexit(void)
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{
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#ifdef CONFIG_BCMA_HOST_PCI
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bcma_host_pci_exit();
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#endif
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bus_unregister(&bcma_bus_type);
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}
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module_exit(bcma_modexit)
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