- 根目录:
- drivers
- bcma
- main.c
/*
* 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>
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 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 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 ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct bcma_device *core = container_of(dev, struct bcma_device, dev);
return sprintf(buf, "0x%X\n", core->id.class);
}
static struct device_attribute bcma_device_attrs[] = {
__ATTR_RO(manuf),
__ATTR_RO(id),
__ATTR_RO(rev),
__ATTR_RO(class),
__ATTR_NULL,
};
static 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_attrs = bcma_device_attrs,
};
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(struct bcma_bus *bus, u16 coreid)
{
struct bcma_device *core;
list_for_each_entry(core, &bus->cores, list) {
if (core->id.id == coreid)
return core;
}
return NULL;
}
EXPORT_SYMBOL_GPL(bcma_find_core);
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;
}
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 int bcma_register_cores(struct bcma_bus *bus)
{
struct bcma_device *core;
int err, dev_id = 0;
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_PCI:
case BCMA_CORE_PCIE:
case BCMA_CORE_MIPS_74K:
case BCMA_CORE_4706_MAC_GBIT_COMMON:
continue;
}
/* Only first GMAC core on BCM4706 is connected and working */
if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
core->core_unit > 0)
continue;
core->dev.release = bcma_release_core_dev;
core->dev.bus = &bcma_bus_type;
dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);
switch (bus->hosttype) {
case BCMA_HOSTTYPE_PCI:
core->dev.parent = &bus->host_pci->dev;
core->dma_dev = &bus->host_pci->dev;
core->irq = bus->host_pci->irq;
break;
case BCMA_HOSTTYPE_SOC:
core->dev.dma_mask = &core->dev.coherent_dma_mask;
core->dma_dev = &core->dev;
break;
case BCMA_HOSTTYPE_SDIO:
break;
}
err = device_register(&core->dev);
if (err) {
bcma_err(bus,
"Could not register dev for core 0x%03X\n",
core->id.id);
continue;
}
core->dev_registered = true;
dev_id++;
}
#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;
}
static void bcma_unregister_cores(struct bcma_bus *bus)
{
struct bcma_device *core, *tmp;
list_for_each_entry_safe(core, tmp, &bus->cores, list) {
list_del(&core->list);
if (core->dev_registered)
device_unregister(&core->dev);
}
if (bus->hosttype == BCMA_HOSTTYPE_SOC)
platform_device_unregister(bus->drv_cc.watchdog);
}
int bcma_bus_register(struct bcma_bus *bus)
{
int err;
struct bcma_device *core;
mutex_lock(&bcma_buses_mutex);
bus->num = bcma_bus_next_num++;
mutex_unlock(&bcma_buses_mutex);
/* Scan for devices (cores) */
err = bcma_bus_scan(bus);
if (err) {
bcma_err(bus, "Failed to scan: %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);
}
/* 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 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 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_cores(bus);
bcma_info(bus, "Bus registered\n");
return 0;
}
void bcma_bus_unregister(struct bcma_bus *bus)
{
struct bcma_device *cores[3];
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);
cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
bcma_unregister_cores(bus);
kfree(cores[2]);
kfree(cores[1]);
kfree(cores[0]);
}
int __init bcma_bus_early_register(struct bcma_bus *bus,
struct bcma_device *core_cc,
struct bcma_device *core_mips)
{
int err;
struct bcma_device *core;
struct bcma_device_id match;
bcma_init_bus(bus);
match.manuf = BCMA_MANUF_BCM;
match.id = bcma_cc_core_id(bus);
match.class = BCMA_CL_SIM;
match.rev = BCMA_ANY_REV;
/* Scan for chip common core */
err = bcma_bus_scan_early(bus, &match, core_cc);
if (err) {
bcma_err(bus, "Failed to scan for common core: %d\n", err);
return -1;
}
match.manuf = BCMA_MANUF_MIPS;
match.id = BCMA_CORE_MIPS_74K;
match.class = BCMA_CL_SIM;
match.rev = BCMA_ANY_REV;
/* Scan for mips core */
err = bcma_bus_scan_early(bus, &match, core_mips);
if (err) {
bcma_err(bus, "Failed to scan for mips core: %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;
#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
bus_unregister(&bcma_bus_type);
}
module_exit(bcma_modexit)