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Commit 33928eed authored by hayeswang's avatar hayeswang Committed by David S. Miller
Browse files

r8152: check hw version first 



Check hw version first in probe(). Do nothing if the driver doesn't
support the chip.

Signed-off-by: default avatarHayes Wang <hayeswang@realtek.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b6e13aea

drivers/net/usb/r8152.c

+63 −39
Original line number Diff line number Diff line
@@ -4236,44 +4236,6 @@ static const struct net_device_ops rtl8152_netdev_ops = { 
	.ndo_features_check	= rtl8152_features_check,

};



static void r8152b_get_version(struct r8152 *tp)

{

	u32	ocp_data;

	u16	version;



	ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_TCR1);

	version = (u16)(ocp_data & VERSION_MASK);



	switch (version) {

	case 0x4c00:

		tp->version = RTL_VER_01;

		break;

	case 0x4c10:

		tp->version = RTL_VER_02;

		break;

	case 0x5c00:

		tp->version = RTL_VER_03;

		tp->mii.supports_gmii = 1;

		break;

	case 0x5c10:

		tp->version = RTL_VER_04;

		tp->mii.supports_gmii = 1;

		break;

	case 0x5c20:

		tp->version = RTL_VER_05;

		tp->mii.supports_gmii = 1;

		break;

	case 0x5c30:

		tp->version = RTL_VER_06;

		tp->mii.supports_gmii = 1;

		break;

	default:

		netif_info(tp, probe, tp->netdev,

			   "Unknown version 0x%04x\n", version);

		break;

	}

}



static void rtl8152_unload(struct r8152 *tp)

{

	if (test_bit(RTL8152_UNPLUG, &tp->flags))
@@ -4338,14 +4300,66 @@ static int rtl_ops_init(struct r8152 *tp) 
	return ret;

}



static u8 rtl_get_version(struct usb_interface *intf)

{

	struct usb_device *udev = interface_to_usbdev(intf);

	u32 ocp_data = 0;

	__le32 *tmp;

	u8 version;

	int ret;



	tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);

	if (!tmp)

		return 0;



	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),

			      RTL8152_REQ_GET_REGS, RTL8152_REQT_READ,

			      PLA_TCR0, MCU_TYPE_PLA, tmp, sizeof(*tmp), 500);

	if (ret > 0)

		ocp_data = (__le32_to_cpu(*tmp) >> 16) & VERSION_MASK;



	kfree(tmp);



	switch (ocp_data) {

	case 0x4c00:

		version = RTL_VER_01;

		break;

	case 0x4c10:

		version = RTL_VER_02;

		break;

	case 0x5c00:

		version = RTL_VER_03;

		break;

	case 0x5c10:

		version = RTL_VER_04;

		break;

	case 0x5c20:

		version = RTL_VER_05;

		break;

	case 0x5c30:

		version = RTL_VER_06;

		break;

	default:

		version = RTL_VER_UNKNOWN;

		dev_info(&intf->dev, "Unknown version 0x%04x\n", ocp_data);

		break;

	}



	return version;

}



static int rtl8152_probe(struct usb_interface *intf,

			 const struct usb_device_id *id)

{

	struct usb_device *udev = interface_to_usbdev(intf);

	u8 version = rtl_get_version(intf);

	struct r8152 *tp;

	struct net_device *netdev;

	int ret;



	if (version == RTL_VER_UNKNOWN)

		return -ENODEV;



	if (udev->actconfig->desc.bConfigurationValue != 1) {

		usb_driver_set_configuration(udev, 1);

		return -ENODEV;
@@ -4365,8 +4379,18 @@ static int rtl8152_probe(struct usb_interface *intf, 
	tp->udev = udev;

	tp->netdev = netdev;

	tp->intf = intf;

	tp->version = version;



	switch (version) {

	case RTL_VER_01:

	case RTL_VER_02:

		tp->mii.supports_gmii = 0;

		break;

	default:

		tp->mii.supports_gmii = 1;

		break;

	}



	r8152b_get_version(tp);

	ret = rtl_ops_init(tp);

	if (ret)

		goto out;