On 8/28/2017 11:25 AM, Wright Feng wrote:
From: Chung-Hsien Hsu <stanley.hsu@xxxxxxxxxxx>
The firmware for brcmfmac devices includes information regarding
regulatory constraints. For certain devices this information is kept
separately in a binary form that needs to be downloaded to the device.
This patch adds support to download this so-called CLM blob file. It
uses the same naming scheme as the other firmware files with extension
of .clm_blob.
The CLM blob file is optional. If the file does not exist, the download
process will be bypassed. It will not affect the driver loading.
Signed-off-by: Chung-Hsien Hsu <stanley.hsu@xxxxxxxxxxx>
---
v2: Revise commit message to describe in more detail
v3: Add error handling in brcmf_c_get_clm_name function
v4: Correct the length of dload_buf in brcmf_c_download function
---
.../net/wireless/broadcom/brcm80211/brcmfmac/bus.h | 10 ++
.../wireless/broadcom/brcm80211/brcmfmac/common.c | 161 +++++++++++++++++++++
.../wireless/broadcom/brcm80211/brcmfmac/core.c | 2 +
.../wireless/broadcom/brcm80211/brcmfmac/core.h | 2 +
.../broadcom/brcm80211/brcmfmac/fwil_types.h | 31 ++++
.../wireless/broadcom/brcm80211/brcmfmac/pcie.c | 19 +++
.../wireless/broadcom/brcm80211/brcmfmac/sdio.c | 19 +++
.../net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 18 +++
8 files changed, 262 insertions(+)
[...]
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
index 7a2b495..d09922b 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
[...]
@@ -104,12 +106,139 @@ void brcmf_c_set_joinpref_default(struct brcmf_if *ifp)
brcmf_err("Set join_pref error (%d)\n", err);
}
+static int brcmf_c_download(struct brcmf_if *ifp, u16 flag,
+ struct brcmf_dload_data_le *dload_buf,
+ u32 len)
+{
+ s32 err;
+
+ flag |= (DLOAD_HANDLER_VER << DLOAD_FLAG_VER_SHIFT);
+ dload_buf->flag = cpu_to_le16(flag);
+ dload_buf->dload_type = cpu_to_le16(DL_TYPE_CLM);
+ dload_buf->len = cpu_to_le32(len);
+ dload_buf->crc = cpu_to_le32(0);
+ len = sizeof(*dload_buf) + len - 1;
+ len = len + 8 - (len % 8);
In case len is 8 this will result in 16. So better use roundup() macro
from include/linux/kernel.h [1]. However, this means
brcmf_fil_iovar_data_set() will read after the allocated buffer space.
By the way, where does the alignment requirement come from?
+
+ err = brcmf_fil_iovar_data_set(ifp, "clmload", (void *)dload_buf, len);
The cast is not necessary so please remove.
Regards,
Arend
[1]
http://elixir.free-electrons.com/linux/latest/source/include/linux/kernel.h#L90
