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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>
This commit is contained in:
Prameela Rani Garnepudi 2017-05-16 15:31:13 +05:30 committed by Kalle Valo
parent ea3336ac00
commit 88fa51e1b3
1 changed files with 40 additions and 0 deletions
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40
drivers/net/wireless/rsi/rsi_91x_usb.c
View File

@ -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.