diff options
| author | Prameela Rani Garnepudi <prameela.j04cs@gmail.com> | 2017-05-16 13:01:13 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2017-05-24 16:37:51 +0300 |
| commit | 88fa51e1b33c27bba6080f04f218e9d17632aec7 (patch) | |
| tree | 8c0eff6417c3b30a5b14b52c63c1e931bf328fba /drivers/net/wireless/rsi | |
| parent | ea3336ac0094b9d461fdde22127087ee293e609a (diff) | |
| download | linux-88fa51e1b33c27bba6080f04f218e9d17632aec7.tar.xz | |
rsi: Add usb multi-byte read operation
USB multibyte read will be used in the new firmware loading method
for RS9113 chipset.
Signed-off-by: Prameela Rani Garnepudi <prameela.j04cs@gmail.com>
Signed-off-by: Amitkumar Karwar <amit.karwar@redpinesignals.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/rsi')
| -rw-r--r-- | drivers/net/wireless/rsi/rsi_91x_usb.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/net/wireless/rsi/rsi_91x_usb.c b/drivers/net/wireless/rsi/rsi_91x_usb.c index a900a7288acb..31f96f0f6e30 100644 --- a/drivers/net/wireless/rsi/rsi_91x_usb.c +++ b/drivers/net/wireless/rsi/rsi_91x_usb.c @@ -276,6 +276,46 @@ static int rsi_rx_urb_submit(struct rsi_hw *adapter) return status; } +static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr, + u8 *data, u16 count) +{ + struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; + u8 *buf; + u16 transfer; + int status; + + if (!addr) + return -EINVAL; + + buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + while (count) { + transfer = min_t(u16, count, RSI_USB_BUF_SIZE); + status = usb_control_msg(dev->usbdev, + usb_rcvctrlpipe(dev->usbdev, 0), + USB_VENDOR_REGISTER_READ, + RSI_USB_REQ_IN, + ((addr & 0xffff0000) >> 16), + (addr & 0xffff), (void *)buf, + transfer, USB_CTRL_GET_TIMEOUT); + if (status < 0) { + rsi_dbg(ERR_ZONE, + "Reg read failed with error code :%d\n", + status); + kfree(buf); + return status; + } + memcpy(data, buf, transfer); + count -= transfer; + data += transfer; + addr += transfer; + } + kfree(buf); + return 0; +} + /** * rsi_usb_write_register_multiple() - This function writes multiple bytes of * information to multiple registers. |