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linux-hardened/drivers/bcma/main.c
Henrik Rydberg 2e6b411971 bcma: don't fail for bad SPROM CRC 
The brcmsmac driver is now using the bcma SPROM CRC check, which does
not recognize all chipsets that were functional prior to the switch. In
particular, the current code bails out on odd CRC errors in recent
Macbooks. This patch ignores those errors, with the argument that an
unrecognized SPROM should be treated similarly to a non-existing one.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-02-06 14:37:52 -05:00

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/*
* Broadcom specific AMBA
* Bus subsystem
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include "bcma_private.h"
#include <linux/module.h>
#include <linux/bcma/bcma.h>
#include <linux/slab.h>
MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
MODULE_LICENSE("GPL");
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 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;
}
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_CHIPCOMMON:
case BCMA_CORE_PCI:
case BCMA_CORE_PCIE:
case BCMA_CORE_MIPS_74K:
continue;
}
core->dev.release = bcma_release_core_dev;
core->dev.bus = &bcma_bus_type;
dev_set_name(&core->dev, "bcma%d:%d", 0/*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) {
pr_err("Could not register dev for core 0x%03X\n",
core->id.id);
continue;
}
core->dev_registered = true;
dev_id++;
}
return 0;
}
static void bcma_unregister_cores(struct bcma_bus *bus)
{
struct bcma_device *core;
list_for_each_entry(core, &bus->cores, list) {
if (core->dev_registered)
device_unregister(&core->dev);
}
}
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) {
pr_err("Failed to scan: %d\n", err);
return -1;
}
/* Init CC core */
core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
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(bus, BCMA_CORE_PCIE);
if (core) {
bus->drv_pci.core = core;
bcma_core_pci_init(&bus->drv_pci);
}
/* Try to get SPROM */
err = bcma_sprom_get(bus);
if (err == -ENOENT) {
pr_err("No SPROM available\n");
} else if (err)
pr_err("Failed to get SPROM: %d\n", err);
/* Register found cores */
bcma_register_cores(bus);
pr_info("Bus registered\n");
return 0;
}
void bcma_bus_unregister(struct bcma_bus *bus)
{
bcma_unregister_cores(bus);
}
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_CORE_CHIPCOMMON;
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) {
pr_err("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) {
pr_err("Failed to scan for mips core: %d\n", err);
return -1;
}
/* Init CC core */
core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
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);
}
pr_info("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 */
core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
if (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)
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