diff options
Diffstat (limited to 'drivers/net/wireless/bcm43xx')
| -rw-r--r-- | drivers/net/wireless/bcm43xx/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/bcm43xx/bcm43xx.h | 6 | ||||
| -rw-r--r-- | drivers/net/wireless/bcm43xx/bcm43xx_main.c | 37 |
3 files changed, 44 insertions, 0 deletions
diff --git a/drivers/net/wireless/bcm43xx/Kconfig b/drivers/net/wireless/bcm43xx/Kconfig index 25ea4748f0b..533993f538f 100644 --- a/drivers/net/wireless/bcm43xx/Kconfig +++ b/drivers/net/wireless/bcm43xx/Kconfig @@ -2,6 +2,7 @@ config BCM43XX tristate "Broadcom BCM43xx wireless support" depends on PCI && IEEE80211 && IEEE80211_SOFTMAC && NET_RADIO && EXPERIMENTAL select FW_LOADER + select HW_RANDOM ---help--- This is an experimental driver for the Broadcom 43xx wireless chip, found in the Apple Airport Extreme and various other devices. diff --git a/drivers/net/wireless/bcm43xx/bcm43xx.h b/drivers/net/wireless/bcm43xx/bcm43xx.h index d8f917c21ea..17a56828e23 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx.h +++ b/drivers/net/wireless/bcm43xx/bcm43xx.h @@ -1,6 +1,7 @@ #ifndef BCM43xx_H_ #define BCM43xx_H_ +#include <linux/hw_random.h> #include <linux/version.h> #include <linux/kernel.h> #include <linux/spinlock.h> @@ -82,6 +83,7 @@ #define BCM43xx_MMIO_TSF_1 0x634 /* core rev < 3 only */ #define BCM43xx_MMIO_TSF_2 0x636 /* core rev < 3 only */ #define BCM43xx_MMIO_TSF_3 0x638 /* core rev < 3 only */ +#define BCM43xx_MMIO_RNG 0x65A #define BCM43xx_MMIO_POWERUP_DELAY 0x6A8 /* SPROM offsets. */ @@ -750,6 +752,10 @@ struct bcm43xx_private { const struct firmware *initvals0; const struct firmware *initvals1; + /* Random Number Generator. */ + struct hwrng rng; + char rng_name[20 + 1]; + /* Debugging stuff follows. */ #ifdef CONFIG_BCM43XX_DEBUG struct bcm43xx_dfsentry *dfsentry; diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.c b/drivers/net/wireless/bcm43xx/bcm43xx_main.c index 085d7857fe3..27bcf47228e 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_main.c +++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.c @@ -3237,6 +3237,39 @@ static void bcm43xx_security_init(struct bcm43xx_private *bcm) bcm43xx_clear_keys(bcm); } +static int bcm43xx_rng_read(struct hwrng *rng, u32 *data) +{ + struct bcm43xx_private *bcm = (struct bcm43xx_private *)rng->priv; + unsigned long flags; + + bcm43xx_lock_irqonly(bcm, flags); + *data = bcm43xx_read16(bcm, BCM43xx_MMIO_RNG); + bcm43xx_unlock_irqonly(bcm, flags); + + return (sizeof(u16)); +} + +static void bcm43xx_rng_exit(struct bcm43xx_private *bcm) +{ + hwrng_unregister(&bcm->rng); +} + +static int bcm43xx_rng_init(struct bcm43xx_private *bcm) +{ + int err; + + snprintf(bcm->rng_name, ARRAY_SIZE(bcm->rng_name), + "%s_%s", KBUILD_MODNAME, bcm->net_dev->name); + bcm->rng.name = bcm->rng_name; + bcm->rng.data_read = bcm43xx_rng_read; + bcm->rng.priv = (unsigned long)bcm; + err = hwrng_register(&bcm->rng); + if (err) + printk(KERN_ERR PFX "RNG init failed (%d)\n", err); + + return err; +} + /* This is the opposite of bcm43xx_init_board() */ static void bcm43xx_free_board(struct bcm43xx_private *bcm) { @@ -3248,6 +3281,7 @@ static void bcm43xx_free_board(struct bcm43xx_private *bcm) bcm43xx_set_status(bcm, BCM43xx_STAT_SHUTTINGDOWN); + bcm43xx_rng_exit(bcm); for (i = 0; i < BCM43xx_MAX_80211_CORES; i++) { if (!bcm->core_80211[i].available) continue; @@ -3325,6 +3359,9 @@ static int bcm43xx_init_board(struct bcm43xx_private *bcm) bcm43xx_switch_core(bcm, &bcm->core_80211[0]); bcm43xx_mac_enable(bcm); } + err = bcm43xx_rng_init(bcm); + if (err) + goto err_80211_unwind; bcm43xx_macfilter_clear(bcm, BCM43xx_MACFILTER_ASSOC); bcm43xx_macfilter_set(bcm, BCM43xx_MACFILTER_SELF, (u8 *)(bcm->net_dev->dev_addr)); dprintk(KERN_INFO PFX "80211 cores initialized\n"); |