summaryrefslogtreecommitdiff
path: root/drivers/ssb
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ssb')
-rw-r--r--drivers/ssb/driver_pcicore.c4
-rw-r--r--drivers/ssb/main.c126
-rw-r--r--drivers/ssb/scan.c2
-rw-r--r--drivers/ssb/sprom.c30
-rw-r--r--drivers/ssb/ssb_private.h12
5 files changed, 97 insertions, 77 deletions
diff --git a/drivers/ssb/driver_pcicore.c b/drivers/ssb/driver_pcicore.c
index 538c570df337..f1dcd7969a5c 100644
--- a/drivers/ssb/driver_pcicore.c
+++ b/drivers/ssb/driver_pcicore.c
@@ -551,13 +551,13 @@ int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc,
might_sleep_if(pdev->id.coreid != SSB_DEV_PCI);
/* Enable interrupts for this device. */
- if (bus->host_pci &&
- ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE))) {
+ if ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE)) {
u32 coremask;
/* Calculate the "coremask" for the device. */
coremask = (1 << dev->core_index);
+ SSB_WARN_ON(bus->bustype != SSB_BUSTYPE_PCI);
err = pci_read_config_dword(bus->host_pci, SSB_PCI_IRQMASK, &tmp);
if (err)
goto out;
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index 579b114be412..5681ebed9c65 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -140,6 +140,19 @@ static void ssb_device_put(struct ssb_device *dev)
put_device(dev->dev);
}
+static inline struct ssb_driver *ssb_driver_get(struct ssb_driver *drv)
+{
+ if (drv)
+ get_driver(&drv->drv);
+ return drv;
+}
+
+static inline void ssb_driver_put(struct ssb_driver *drv)
+{
+ if (drv)
+ put_driver(&drv->drv);
+}
+
static int ssb_device_resume(struct device *dev)
{
struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
@@ -210,90 +223,81 @@ int ssb_bus_suspend(struct ssb_bus *bus)
EXPORT_SYMBOL(ssb_bus_suspend);
#ifdef CONFIG_SSB_SPROM
-int ssb_devices_freeze(struct ssb_bus *bus)
+/** ssb_devices_freeze - Freeze all devices on the bus.
+ *
+ * After freezing no device driver will be handling a device
+ * on this bus anymore. ssb_devices_thaw() must be called after
+ * a successful freeze to reactivate the devices.
+ *
+ * @bus: The bus.
+ * @ctx: Context structure. Pass this to ssb_devices_thaw().
+ */
+int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
{
- struct ssb_device *dev;
- struct ssb_driver *drv;
- int err = 0;
- int i;
- pm_message_t state = PMSG_FREEZE;
+ struct ssb_device *sdev;
+ struct ssb_driver *sdrv;
+ unsigned int i;
+
+ memset(ctx, 0, sizeof(*ctx));
+ ctx->bus = bus;
+ SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
- /* First check that we are capable to freeze all devices. */
for (i = 0; i < bus->nr_devices; i++) {
- dev = &(bus->devices[i]);
- if (!dev->dev ||
- !dev->dev->driver ||
- !device_is_registered(dev->dev))
- continue;
- drv = drv_to_ssb_drv(dev->dev->driver);
- if (!drv)
+ sdev = ssb_device_get(&bus->devices[i]);
+
+ if (!sdev->dev || !sdev->dev->driver ||
+ !device_is_registered(sdev->dev)) {
+ ssb_device_put(sdev);
continue;
- if (!drv->suspend) {
- /* Nope, can't suspend this one. */
- return -EOPNOTSUPP;
}
- }
- /* Now suspend all devices */
- for (i = 0; i < bus->nr_devices; i++) {
- dev = &(bus->devices[i]);
- if (!dev->dev ||
- !dev->dev->driver ||
- !device_is_registered(dev->dev))
- continue;
- drv = drv_to_ssb_drv(dev->dev->driver);
- if (!drv)
+ sdrv = ssb_driver_get(drv_to_ssb_drv(sdev->dev->driver));
+ if (!sdrv || SSB_WARN_ON(!sdrv->remove)) {
+ ssb_device_put(sdev);
continue;
- err = drv->suspend(dev, state);
- if (err) {
- ssb_printk(KERN_ERR PFX "Failed to freeze device %s\n",
- dev_name(dev->dev));
- goto err_unwind;
}
+ sdrv->remove(sdev);
+ ctx->device_frozen[i] = 1;
}
return 0;
-err_unwind:
- for (i--; i >= 0; i--) {
- dev = &(bus->devices[i]);
- if (!dev->dev ||
- !dev->dev->driver ||
- !device_is_registered(dev->dev))
- continue;
- drv = drv_to_ssb_drv(dev->dev->driver);
- if (!drv)
- continue;
- if (drv->resume)
- drv->resume(dev);
- }
- return err;
}
-int ssb_devices_thaw(struct ssb_bus *bus)
+/** ssb_devices_thaw - Unfreeze all devices on the bus.
+ *
+ * This will re-attach the device drivers and re-init the devices.
+ *
+ * @ctx: The context structure from ssb_devices_freeze()
+ */
+int ssb_devices_thaw(struct ssb_freeze_context *ctx)
{
- struct ssb_device *dev;
- struct ssb_driver *drv;
- int err;
- int i;
+ struct ssb_bus *bus = ctx->bus;
+ struct ssb_device *sdev;
+ struct ssb_driver *sdrv;
+ unsigned int i;
+ int err, result = 0;
for (i = 0; i < bus->nr_devices; i++) {
- dev = &(bus->devices[i]);
- if (!dev->dev ||
- !dev->dev->driver ||
- !device_is_registered(dev->dev))
+ if (!ctx->device_frozen[i])
continue;
- drv = drv_to_ssb_drv(dev->dev->driver);
- if (!drv)
+ sdev = &bus->devices[i];
+
+ if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
continue;
- if (SSB_WARN_ON(!drv->resume))
+ sdrv = drv_to_ssb_drv(sdev->dev->driver);
+ if (SSB_WARN_ON(!sdrv || !sdrv->probe))
continue;
- err = drv->resume(dev);
+
+ err = sdrv->probe(sdev, &sdev->id);
if (err) {
ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
- dev_name(dev->dev));
+ dev_name(sdev->dev));
+ result = err;
}
+ ssb_driver_put(sdrv);
+ ssb_device_put(sdev);
}
- return 0;
+ return result;
}
#endif /* CONFIG_SSB_SPROM */
diff --git a/drivers/ssb/scan.c b/drivers/ssb/scan.c
index e8b89e8ac9bd..0d6c0280eb34 100644
--- a/drivers/ssb/scan.c
+++ b/drivers/ssb/scan.c
@@ -354,7 +354,7 @@ int ssb_bus_scan(struct ssb_bus *bus,
dev->bus = bus;
dev->ops = bus->ops;
- ssb_dprintk(KERN_INFO PFX
+ printk(KERN_DEBUG PFX
"Core %d found: %s "
"(cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
i, ssb_core_name(dev->id.coreid),
diff --git a/drivers/ssb/sprom.c b/drivers/ssb/sprom.c
index 8943015a3eef..d0e6762fec50 100644
--- a/drivers/ssb/sprom.c
+++ b/drivers/ssb/sprom.c
@@ -13,6 +13,8 @@
#include "ssb_private.h"
+#include <linux/ctype.h>
+
static const struct ssb_sprom *fallback_sprom;
@@ -33,17 +35,27 @@ static int sprom2hex(const u16 *sprom, char *buf, size_t buf_len,
static int hex2sprom(u16 *sprom, const char *dump, size_t len,
size_t sprom_size_words)
{
- char tmp[5] = { 0 };
- int cnt = 0;
+ char c, tmp[5] = { 0 };
+ int err, cnt = 0;
unsigned long parsed;
- if (len < sprom_size_words * 2)
+ /* Strip whitespace at the end. */
+ while (len) {
+ c = dump[len - 1];
+ if (!isspace(c) && c != '\0')
+ break;
+ len--;
+ }
+ /* Length must match exactly. */
+ if (len != sprom_size_words * 4)
return -EINVAL;
while (cnt < sprom_size_words) {
memcpy(tmp, dump, 4);
dump += 4;
- parsed = simple_strtoul(tmp, NULL, 16);
+ err = strict_strtoul(tmp, 16, &parsed);
+ if (err)
+ return err;
sprom[cnt++] = swab16((u16)parsed);
}
@@ -90,6 +102,7 @@ ssize_t ssb_attr_sprom_store(struct ssb_bus *bus,
u16 *sprom;
int res = 0, err = -ENOMEM;
size_t sprom_size_words = bus->sprom_size;
+ struct ssb_freeze_context freeze;
sprom = kcalloc(bus->sprom_size, sizeof(u16), GFP_KERNEL);
if (!sprom)
@@ -111,18 +124,13 @@ ssize_t ssb_attr_sprom_store(struct ssb_bus *bus,
err = -ERESTARTSYS;
if (mutex_lock_interruptible(&bus->sprom_mutex))
goto out_kfree;
- err = ssb_devices_freeze(bus);
- if (err == -EOPNOTSUPP) {
- ssb_printk(KERN_ERR PFX "SPROM write: Could not freeze devices. "
- "No suspend support. Is CONFIG_PM enabled?\n");
- goto out_unlock;
- }
+ err = ssb_devices_freeze(bus, &freeze);
if (err) {
ssb_printk(KERN_ERR PFX "SPROM write: Could not freeze all devices\n");
goto out_unlock;
}
res = sprom_write(bus, sprom);
- err = ssb_devices_thaw(bus);
+ err = ssb_devices_thaw(&freeze);
if (err)
ssb_printk(KERN_ERR PFX "SPROM write: Could not thaw all devices\n");
out_unlock:
diff --git a/drivers/ssb/ssb_private.h b/drivers/ssb/ssb_private.h
index 25433565dfda..56054be4d113 100644
--- a/drivers/ssb/ssb_private.h
+++ b/drivers/ssb/ssb_private.h
@@ -176,13 +176,21 @@ extern const struct ssb_sprom *ssb_get_fallback_sprom(void);
/* core.c */
extern u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m);
-extern int ssb_devices_freeze(struct ssb_bus *bus);
-extern int ssb_devices_thaw(struct ssb_bus *bus);
extern struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev);
int ssb_for_each_bus_call(unsigned long data,
int (*func)(struct ssb_bus *bus, unsigned long data));
extern struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev);
+struct ssb_freeze_context {
+ /* Pointer to the bus */
+ struct ssb_bus *bus;
+ /* Boolean list to indicate whether a device is frozen on this bus. */
+ bool device_frozen[SSB_MAX_NR_CORES];
+};
+extern int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx);
+extern int ssb_devices_thaw(struct ssb_freeze_context *ctx);
+
+
/* b43_pci_bridge.c */
#ifdef CONFIG_SSB_B43_PCI_BRIDGE
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-27 09:07:58 +0000