path: root/drivers/net/wireless/realtek/rtlwifi/usb.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2009-2012  Realtek Corporation.*/

#include "wifi.h"
#include "core.h"
#include "usb.h"
#include "base.h"
#include "ps.h"
#include "rtl8192c/fw_common.h"
#include <linux/export.h>
#include <linux/module.h>

MODULE_AUTHOR("lizhaoming	<chaoming_li@realsil.com.cn>");
MODULE_AUTHOR("Realtek WlanFAE	<wlanfae@realtek.com>");
MODULE_AUTHOR("Larry Finger	<Larry.FInger@lwfinger.net>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("USB basic driver for rtlwifi");

#define	REALTEK_USB_VENQT_READ			0xC0
#define	REALTEK_USB_VENQT_WRITE			0x40
#define REALTEK_USB_VENQT_CMD_REQ		0x05
#define	REALTEK_USB_VENQT_CMD_IDX		0x00

#define MAX_USBCTRL_VENDORREQ_TIMES		10

static void _rtl_usb_cleanup_tx(struct ieee80211_hw *hw);

static void _usbctrl_vendorreq_sync(struct usb_device *udev, u8 reqtype,
				   u16 value, void *pdata, u16 len)
{
	unsigned int pipe;
	int status;
	int vendorreq_times = 0;
	static int count;

	if (reqtype == REALTEK_USB_VENQT_READ)
		pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
	else
		pipe = usb_sndctrlpipe(udev, 0); /* write_out */

	do {
		status = usb_control_msg(udev, pipe, REALTEK_USB_VENQT_CMD_REQ,
					 reqtype, value, REALTEK_USB_VENQT_CMD_IDX,
					 pdata, len, 1000);
		if (status < 0) {
			/* firmware download is checksumed, don't retry */
			if ((value >= FW_8192C_START_ADDRESS &&
			    value <= FW_8192C_END_ADDRESS))
				break;
		} else {
			break;
		}
	} while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);

	if (status < 0 && count++ < 4)
		dev_err(&udev->dev, "reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x reqtype=0x%x\n",
		       value, status, *(u32 *)pdata, reqtype);
}

static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
{
	struct device *dev = rtlpriv->io.dev;
	struct usb_device *udev = to_usb_device(dev);
	u16 wvalue;
	__le32 *data;
	unsigned long flags;

	spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
	if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
		rtlpriv->usb_data_index = 0;
	data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
	spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);

	wvalue = (u16)addr;
	_usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_READ, wvalue, data, len);
	return le32_to_cpu(*data);
}


static void _usb_write_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val, u16 len)
{
	struct device *dev = rtlpriv->io.dev;
	struct usb_device *udev = to_usb_device(dev);
	unsigned long flags;
	__le32 *data;
	u16 wvalue;

	spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
	if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
		rtlpriv->usb_data_index = 0;
	data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
	spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);

	wvalue = (u16)(addr & 0x0000ffff);
	*data = cpu_to_le32(val);

	_usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, wvalue, data, len);
}

static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
{
	return (u8)_usb_read_sync(rtlpriv, addr, 1);
}

static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
{
	return (u16)_usb_read_sync(rtlpriv, addr, 2);
}

static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
{
	return _usb_read_sync(rtlpriv, addr, 4);
}

static void _usb_write8_sync(struct rtl_priv *rtlpriv, u32 addr, u8 val)
{
	_usb_write_sync(rtlpriv, addr, val, 1);
}

static void _usb_write16_sync(struct rtl_priv *rtlpriv, u32 addr, u16 val)
{
	_usb_write_sync(rtlpriv, addr, val, 2);
}

static void _usb_write32_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val)
{
	_usb_write_sync(rtlpriv, addr, val, 4);
}

static void _usb_write_chunk_sync(struct rtl_priv *rtlpriv, u32 addr,
				  u32 length, u8 *data)
{
	struct usb_device *udev = to_usb_device(rtlpriv->io.dev);

	_usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE