Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 88fa51e1 authored by Prameela Rani Garnepudi's avatar Prameela Rani Garnepudi Committed by Kalle Valo
Browse files

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: default avatarPrameela Rani Garnepudi <prameela.j04cs@gmail.com>
Signed-off-by: default avatarAmitkumar Karwar <amit.karwar@redpinesignals.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent ea3336ac

drivers/net/wireless/rsi/rsi_91x_usb.c

+40 −0
Original line number Diff line number Diff line
@@ -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.