From: Rafał Miłecki <[email protected]> This includes bus reset & reloading a firmware. It should be sufficient for a user space to (setup and) use a wireless device again.
Support for reset on USB & SDIO can be added later. Signed-off-by: Rafał Miłecki <[email protected]> --- .../broadcom/brcm80211/brcmfmac/bus.h | 10 ++++++ .../broadcom/brcm80211/brcmfmac/core.c | 12 +++++++ .../broadcom/brcm80211/brcmfmac/core.h | 2 ++ .../broadcom/brcm80211/brcmfmac/pcie.c | 35 +++++++++++++++++++ 4 files changed, 59 insertions(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bus.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bus.h index 801106583ae7..2fe167eae22c 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bus.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bus.h @@ -91,6 +91,7 @@ struct brcmf_bus_ops { int (*get_fwname)(struct device *dev, const char *ext, unsigned char *fw_name); void (*debugfs_create)(struct device *dev); + int (*reset)(struct device *dev); }; @@ -245,6 +246,15 @@ void brcmf_bus_debugfs_create(struct brcmf_bus *bus) return bus->ops->debugfs_create(bus->dev); } +static inline +int brcmf_bus_reset(struct brcmf_bus *bus) +{ + if (!bus->ops->reset) + return -EOPNOTSUPP; + + return bus->ops->reset(bus->dev); +} + /* * interface functions from common layer */ diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c index 7f4d9356b79e..5f3548b13639 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c @@ -1084,6 +1084,14 @@ static int brcmf_revinfo_read(struct seq_file *s, void *data) return 0; } +static void brcmf_core_bus_reset(struct work_struct *work) +{ + struct brcmf_pub *drvr = container_of(work, struct brcmf_pub, + bus_reset); + + brcmf_bus_reset(drvr->bus_if); +} + static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops) { int ret = -1; @@ -1155,6 +1163,8 @@ static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops) #endif #endif /* CONFIG_INET */ + INIT_WORK(&drvr->bus_reset, brcmf_core_bus_reset); + /* populate debugfs */ brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read); brcmf_feat_debugfs_create(drvr); @@ -1281,6 +1291,8 @@ void brcmf_fw_crashed(struct device *dev) bphy_err(drvr, "Firmware has halted or crashed\n"); brcmf_dev_coredump(dev); + + schedule_work(&drvr->bus_reset); } void brcmf_detach(struct device *dev) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h index d8085ce579f4..9f09aa31eeda 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.h @@ -143,6 +143,8 @@ struct brcmf_pub { struct notifier_block inet6addr_notifier; struct brcmf_mp_device *settings; + struct work_struct bus_reset; + u8 clmver[BRCMF_DCMD_SMLEN]; }; diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c index cfa34672315f..e941039ee1c3 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c @@ -345,6 +345,10 @@ static const u32 brcmf_ring_itemsize[BRCMF_NROF_COMMON_MSGRINGS] = { BRCMF_D2H_MSGRING_RX_COMPLETE_ITEMSIZE }; +static void brcmf_pcie_setup(struct device *dev, int ret, + struct brcmf_fw_request *fwreq); +static struct brcmf_fw_request * +brcmf_pcie_prepare_fw_request(struct brcmf_pciedev_info *devinfo); static u32 brcmf_pcie_read_reg32(struct brcmf_pciedev_info *devinfo, u32 reg_offset) @@ -1409,6 +1413,36 @@ int brcmf_pcie_get_fwname(struct device *dev, const char *ext, u8 *fw_name) return 0; } +static int brcmf_pcie_reset(struct device *dev) +{ + struct brcmf_bus *bus_if = dev_get_drvdata(dev); + struct brcmf_pciedev *buspub = bus_if->bus_priv.pcie; + struct brcmf_pciedev_info *devinfo = buspub->devinfo; + struct brcmf_fw_request *fwreq; + int err; + + brcmf_detach(dev); + + brcmf_pcie_release_irq(devinfo); + brcmf_pcie_release_scratchbuffers(devinfo); + brcmf_pcie_release_ringbuffers(devinfo); + brcmf_pcie_reset_device(devinfo); + + fwreq = brcmf_pcie_prepare_fw_request(devinfo); + if (!fwreq) { + dev_err(dev, "Failed to prepare FW request\n"); + return -ENOMEM; + } + + err = brcmf_fw_get_firmwares(dev, fwreq, brcmf_pcie_setup); + if (err) { + dev_err(dev, "Failed to prepare FW request\n"); + kfree(fwreq); + } + + return err; +} + static const struct brcmf_bus_ops brcmf_pcie_bus_ops = { .txdata = brcmf_pcie_tx, .stop = brcmf_pcie_down, @@ -1418,6 +1452,7 @@ static const struct brcmf_bus_ops brcmf_pcie_bus_ops = { .get_ramsize = brcmf_pcie_get_ramsize, .get_memdump = brcmf_pcie_get_memdump, .get_fwname = brcmf_pcie_get_fwname, + .reset = brcmf_pcie_reset, }; -- 2.20.1
