forked from Minki/linux
00e499131e
ChangeLog: - spelling corrections / whitespace Signed-off-by: Andreas Mohr <andi@lisas.de> Signed-off-by: David S. Miller <davem@davemloft.net>
647 lines
16 KiB
C
647 lines
16 KiB
C
/*
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* MOSCHIP MCS7830 based USB 2.0 Ethernet Devices
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*
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* based on usbnet.c, asix.c and the vendor provided mcs7830 driver
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*
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* Copyright (C) 2010 Andreas Mohr <andi@lisas.de>
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* Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>
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* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
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* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
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* Copyright (c) 2002-2003 TiVo Inc.
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*
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* Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!).
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*
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* TODO:
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* - add .reset_resume support (iface is _gone_ after resume w/ power loss)
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* - verify that mcs7830_get_regs() does have same output pre-/post-suspend
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* - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?)
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* - implement ethtool_ops get_pauseparam/set_pauseparam
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* via HIF_REG_PAUSE_THRESHOLD (>= revision C only!)
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* - implement get_eeprom/[set_eeprom]
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* - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII)
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* - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs,
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* can access only ~ 24, remaining user buffer is uninitialized garbage
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* - anything else?
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/crc32.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/init.h>
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#include <linux/mii.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/usb.h>
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#include <linux/usb/usbnet.h>
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/* requests */
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#define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \
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USB_RECIP_DEVICE)
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#define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \
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USB_RECIP_DEVICE)
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#define MCS7830_RD_BREQ 0x0E
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#define MCS7830_WR_BREQ 0x0D
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#define MCS7830_CTRL_TIMEOUT 1000
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#define MCS7830_MAX_MCAST 64
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#define MCS7830_VENDOR_ID 0x9710
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#define MCS7830_PRODUCT_ID 0x7830
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#define MCS7730_PRODUCT_ID 0x7730
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#define SITECOM_VENDOR_ID 0x0DF6
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#define LN_030_PRODUCT_ID 0x0021
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#define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
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ADVERTISE_100HALF | ADVERTISE_10FULL | \
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ADVERTISE_10HALF | ADVERTISE_CSMA)
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/* HIF_REG_XX corresponding index value */
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enum {
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HIF_REG_MULTICAST_HASH = 0x00,
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HIF_REG_PACKET_GAP1 = 0x08,
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HIF_REG_PACKET_GAP2 = 0x09,
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HIF_REG_PHY_DATA = 0x0a,
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HIF_REG_PHY_CMD1 = 0x0c,
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HIF_REG_PHY_CMD1_READ = 0x40,
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HIF_REG_PHY_CMD1_WRITE = 0x20,
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HIF_REG_PHY_CMD1_PHYADDR = 0x01,
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HIF_REG_PHY_CMD2 = 0x0d,
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HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80,
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HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40,
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HIF_REG_CONFIG = 0x0e,
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HIF_REG_CONFIG_CFG = 0x80,
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HIF_REG_CONFIG_SPEED100 = 0x40,
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HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20,
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HIF_REG_CONFIG_RXENABLE = 0x10,
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HIF_REG_CONFIG_TXENABLE = 0x08,
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HIF_REG_CONFIG_SLEEPMODE = 0x04,
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HIF_REG_CONFIG_ALLMULTICAST = 0x02,
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HIF_REG_CONFIG_PROMISCUOUS = 0x01,
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HIF_REG_ETHERNET_ADDR = 0x0f,
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HIF_REG_22 = 0x15,
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HIF_REG_PAUSE_THRESHOLD = 0x16,
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HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0,
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};
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/* Trailing status byte in Ethernet Rx frame */
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enum {
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MCS7830_RX_SHORT_FRAME = 0x01, /* < 64 bytes */
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MCS7830_RX_LENGTH_ERROR = 0x02, /* framelen != Ethernet length field */
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MCS7830_RX_ALIGNMENT_ERROR = 0x04, /* non-even number of nibbles */
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MCS7830_RX_CRC_ERROR = 0x08,
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MCS7830_RX_LARGE_FRAME = 0x10, /* > 1518 bytes */
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MCS7830_RX_FRAME_CORRECT = 0x20, /* frame is correct */
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/* [7:6] reserved */
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};
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struct mcs7830_data {
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u8 multi_filter[8];
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u8 config;
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};
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static const char driver_name[] = "MOSCHIP usb-ethernet driver";
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static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
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{
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struct usb_device *xdev = dev->udev;
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int ret;
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void *buffer;
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buffer = kmalloc(size, GFP_NOIO);
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if (buffer == NULL)
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return -ENOMEM;
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ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ,
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MCS7830_RD_BMREQ, 0x0000, index, buffer,
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size, MCS7830_CTRL_TIMEOUT);
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memcpy(data, buffer, size);
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kfree(buffer);
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return ret;
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}
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static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, void *data)
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{
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struct usb_device *xdev = dev->udev;
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int ret;
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void *buffer;
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buffer = kmalloc(size, GFP_NOIO);
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if (buffer == NULL)
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return -ENOMEM;
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memcpy(buffer, data, size);
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ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,
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MCS7830_WR_BMREQ, 0x0000, index, buffer,
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size, MCS7830_CTRL_TIMEOUT);
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kfree(buffer);
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return ret;
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}
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static void mcs7830_async_cmd_callback(struct urb *urb)
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{
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struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
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int status = urb->status;
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if (status < 0)
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printk(KERN_DEBUG "%s() failed with %d\n",
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__func__, status);
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kfree(req);
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usb_free_urb(urb);
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}
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static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
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{
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struct usb_ctrlrequest *req;
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int ret;
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struct urb *urb;
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb) {
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dev_dbg(&dev->udev->dev,
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"Error allocating URB in write_cmd_async!\n");
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return;
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}
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req = kmalloc(sizeof *req, GFP_ATOMIC);
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if (!req) {
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dev_err(&dev->udev->dev,
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"Failed to allocate memory for control request\n");
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goto out;
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}
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req->bRequestType = MCS7830_WR_BMREQ;
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req->bRequest = MCS7830_WR_BREQ;
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req->wValue = 0;
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req->wIndex = cpu_to_le16(index);
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req->wLength = cpu_to_le16(size);
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usb_fill_control_urb(urb, dev->udev,
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usb_sndctrlpipe(dev->udev, 0),
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(void *)req, data, size,
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mcs7830_async_cmd_callback, req);
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ret = usb_submit_urb(urb, GFP_ATOMIC);
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if (ret < 0) {
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dev_err(&dev->udev->dev,
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"Error submitting the control message: ret=%d\n", ret);
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goto out;
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}
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return;
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out:
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kfree(req);
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usb_free_urb(urb);
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}
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static int mcs7830_get_address(struct usbnet *dev)
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{
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int ret;
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ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
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dev->net->dev_addr);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int mcs7830_read_phy(struct usbnet *dev, u8 index)
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{
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int ret;
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int i;
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__le16 val;
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u8 cmd[2] = {
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HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
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HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
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};
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mutex_lock(&dev->phy_mutex);
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/* write the MII command */
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ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
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if (ret < 0)
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goto out;
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/* wait for the data to become valid, should be within < 1ms */
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for (i = 0; i < 10; i++) {
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ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
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if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
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break;
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ret = -EIO;
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msleep(1);
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}
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if (ret < 0)
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goto out;
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/* read actual register contents */
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ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
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if (ret < 0)
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goto out;
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ret = le16_to_cpu(val);
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dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
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index, val, i);
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out:
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mutex_unlock(&dev->phy_mutex);
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return ret;
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}
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static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
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{
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int ret;
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int i;
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__le16 le_val;
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u8 cmd[2] = {
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HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
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HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
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};
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mutex_lock(&dev->phy_mutex);
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/* write the new register contents */
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le_val = cpu_to_le16(val);
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ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
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if (ret < 0)
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goto out;
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/* write the MII command */
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ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
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if (ret < 0)
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goto out;
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/* wait for the command to be accepted by the PHY */
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for (i = 0; i < 10; i++) {
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ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
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if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
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break;
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ret = -EIO;
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msleep(1);
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}
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if (ret < 0)
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goto out;
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ret = 0;
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dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
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index, val, i);
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out:
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mutex_unlock(&dev->phy_mutex);
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return ret;
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}
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/*
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* This algorithm comes from the original mcs7830 version 1.4 driver,
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* not sure if it is needed.
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*/
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static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
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{
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int ret;
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/* Enable all media types */
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ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
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/* First reset BMCR */
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if (!ret)
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ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
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/* Enable Auto Neg */
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if (!ret)
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ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
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/* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
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if (!ret)
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ret = mcs7830_write_phy(dev, MII_BMCR,
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BMCR_ANENABLE | BMCR_ANRESTART );
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return ret < 0 ? : 0;
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}
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/*
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* if we can read register 22, the chip revision is C or higher
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*/
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static int mcs7830_get_rev(struct usbnet *dev)
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{
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u8 dummy[2];
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int ret;
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ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
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if (ret > 0)
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return 2; /* Rev C or later */
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return 1; /* earlier revision */
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}
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/*
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* On rev. C we need to set the pause threshold
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*/
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static void mcs7830_rev_C_fixup(struct usbnet *dev)
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{
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u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
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int retry;
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for (retry = 0; retry < 2; retry++) {
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if (mcs7830_get_rev(dev) == 2) {
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dev_info(&dev->udev->dev, "applying rev.C fixup\n");
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mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
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1, &pause_threshold);
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}
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msleep(1);
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}
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}
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static int mcs7830_init_dev(struct usbnet *dev)
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{
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int ret;
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int retry;
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/* Read MAC address from EEPROM */
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ret = -EINVAL;
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for (retry = 0; retry < 5 && ret; retry++)
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ret = mcs7830_get_address(dev);
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if (ret) {
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dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
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goto out;
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}
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/* Set up PHY */
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ret = mcs7830_set_autoneg(dev, 0);
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if (ret) {
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dev_info(&dev->udev->dev, "Cannot set autoneg\n");
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goto out;
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}
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mcs7830_rev_C_fixup(dev);
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ret = 0;
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out:
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return ret;
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}
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static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
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int location)
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{
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struct usbnet *dev = netdev_priv(netdev);
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return mcs7830_read_phy(dev, location);
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}
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static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
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int location, int val)
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{
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struct usbnet *dev = netdev_priv(netdev);
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mcs7830_write_phy(dev, location, val);
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}
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static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
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{
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struct usbnet *dev = netdev_priv(net);
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return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
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}
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/* credits go to asix_set_multicast */
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static void mcs7830_set_multicast(struct net_device *net)
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{
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struct usbnet *dev = netdev_priv(net);
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struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
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data->config = HIF_REG_CONFIG_TXENABLE;
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/* this should not be needed, but it doesn't work otherwise */
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data->config |= HIF_REG_CONFIG_ALLMULTICAST;
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if (net->flags & IFF_PROMISC) {
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data->config |= HIF_REG_CONFIG_PROMISCUOUS;
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} else if (net->flags & IFF_ALLMULTI ||
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net->mc_count > MCS7830_MAX_MCAST) {
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data->config |= HIF_REG_CONFIG_ALLMULTICAST;
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} else if (net->mc_count == 0) {
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/* just broadcast and directed */
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} else {
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/* We use the 20 byte dev->data
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* for our 8 byte filter buffer
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* to avoid allocating memory that
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* is tricky to free later */
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struct dev_mc_list *mc_list = net->mc_list;
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u32 crc_bits;
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int i;
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memset(data->multi_filter, 0, sizeof data->multi_filter);
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/* Build the multicast hash filter. */
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for (i = 0; i < net->mc_count; i++) {
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crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
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data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
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mc_list = mc_list->next;
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}
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mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
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sizeof data->multi_filter,
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data->multi_filter);
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}
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mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
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}
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static int mcs7830_get_regs_len(struct net_device *net)
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{
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struct usbnet *dev = netdev_priv(net);
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switch (mcs7830_get_rev(dev)) {
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case 1:
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return 21;
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case 2:
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return 32;
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}
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return 0;
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}
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static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
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{
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usbnet_get_drvinfo(net, drvinfo);
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drvinfo->regdump_len = mcs7830_get_regs_len(net);
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}
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static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
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{
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struct usbnet *dev = netdev_priv(net);
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regs->version = mcs7830_get_rev(dev);
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mcs7830_get_reg(dev, 0, regs->len, data);
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}
|
|
|
|
static const struct ethtool_ops mcs7830_ethtool_ops = {
|
|
.get_drvinfo = mcs7830_get_drvinfo,
|
|
.get_regs_len = mcs7830_get_regs_len,
|
|
.get_regs = mcs7830_get_regs,
|
|
|
|
/* common usbnet calls */
|
|
.get_link = usbnet_get_link,
|
|
.get_msglevel = usbnet_get_msglevel,
|
|
.set_msglevel = usbnet_set_msglevel,
|
|
.get_settings = usbnet_get_settings,
|
|
.set_settings = usbnet_set_settings,
|
|
.nway_reset = usbnet_nway_reset,
|
|
};
|
|
|
|
static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
|
|
{
|
|
int ret;
|
|
struct usbnet *dev = netdev_priv(netdev);
|
|
struct sockaddr *addr = p;
|
|
|
|
if (netif_running(netdev))
|
|
return -EBUSY;
|
|
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
|
return -EINVAL;
|
|
|
|
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
|
|
|
|
ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
|
|
netdev->dev_addr);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_device_ops mcs7830_netdev_ops = {
|
|
.ndo_open = usbnet_open,
|
|
.ndo_stop = usbnet_stop,
|
|
.ndo_start_xmit = usbnet_start_xmit,
|
|
.ndo_tx_timeout = usbnet_tx_timeout,
|
|
.ndo_change_mtu = usbnet_change_mtu,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_do_ioctl = mcs7830_ioctl,
|
|
.ndo_set_multicast_list = mcs7830_set_multicast,
|
|
.ndo_set_mac_address = mcs7830_set_mac_address,
|
|
};
|
|
|
|
static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
|
|
{
|
|
struct net_device *net = dev->net;
|
|
int ret;
|
|
|
|
ret = mcs7830_init_dev(dev);
|
|
if (ret)
|
|
goto out;
|
|
|
|
net->ethtool_ops = &mcs7830_ethtool_ops;
|
|
net->netdev_ops = &mcs7830_netdev_ops;
|
|
mcs7830_set_multicast(net);
|
|
|
|
/* reserve space for the status byte on rx */
|
|
dev->rx_urb_size = ETH_FRAME_LEN + 1;
|
|
|
|
dev->mii.mdio_read = mcs7830_mdio_read;
|
|
dev->mii.mdio_write = mcs7830_mdio_write;
|
|
dev->mii.dev = net;
|
|
dev->mii.phy_id_mask = 0x3f;
|
|
dev->mii.reg_num_mask = 0x1f;
|
|
dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
|
|
|
|
ret = usbnet_get_endpoints(dev, udev);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/* The chip always appends a status byte that we need to strip */
|
|
static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
|
|
{
|
|
u8 status;
|
|
|
|
if (skb->len == 0) {
|
|
dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
|
|
return 0;
|
|
}
|
|
|
|
skb_trim(skb, skb->len - 1);
|
|
status = skb->data[skb->len];
|
|
|
|
if (status != MCS7830_RX_FRAME_CORRECT) {
|
|
dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
|
|
|
|
/* hmm, perhaps usbnet.c already sees a globally visible
|
|
frame error and increments rx_errors on its own already? */
|
|
dev->net->stats.rx_errors++;
|
|
|
|
if (status & (MCS7830_RX_SHORT_FRAME
|
|
|MCS7830_RX_LENGTH_ERROR
|
|
|MCS7830_RX_LARGE_FRAME))
|
|
dev->net->stats.rx_length_errors++;
|
|
if (status & MCS7830_RX_ALIGNMENT_ERROR)
|
|
dev->net->stats.rx_frame_errors++;
|
|
if (status & MCS7830_RX_CRC_ERROR)
|
|
dev->net->stats.rx_crc_errors++;
|
|
}
|
|
|
|
return skb->len > 0;
|
|
}
|
|
|
|
static const struct driver_info moschip_info = {
|
|
.description = "MOSCHIP 7830/7730 usb-NET adapter",
|
|
.bind = mcs7830_bind,
|
|
.rx_fixup = mcs7830_rx_fixup,
|
|
.flags = FLAG_ETHER,
|
|
.in = 1,
|
|
.out = 2,
|
|
};
|
|
|
|
static const struct driver_info sitecom_info = {
|
|
.description = "Sitecom LN-30 usb-NET adapter",
|
|
.bind = mcs7830_bind,
|
|
.rx_fixup = mcs7830_rx_fixup,
|
|
.flags = FLAG_ETHER,
|
|
.in = 1,
|
|
.out = 2,
|
|
};
|
|
|
|
static const struct usb_device_id products[] = {
|
|
{
|
|
USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
|
|
.driver_info = (unsigned long) &moschip_info,
|
|
},
|
|
{
|
|
USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
|
|
.driver_info = (unsigned long) &moschip_info,
|
|
},
|
|
{
|
|
USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
|
|
.driver_info = (unsigned long) &sitecom_info,
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, products);
|
|
|
|
static struct usb_driver mcs7830_driver = {
|
|
.name = driver_name,
|
|
.id_table = products,
|
|
.probe = usbnet_probe,
|
|
.disconnect = usbnet_disconnect,
|
|
.suspend = usbnet_suspend,
|
|
.resume = usbnet_resume,
|
|
};
|
|
|
|
static int __init mcs7830_init(void)
|
|
{
|
|
return usb_register(&mcs7830_driver);
|
|
}
|
|
module_init(mcs7830_init);
|
|
|
|
static void __exit mcs7830_exit(void)
|
|
{
|
|
usb_deregister(&mcs7830_driver);
|
|
}
|
|
module_exit(mcs7830_exit);
|
|
|
|
MODULE_DESCRIPTION("USB to network adapter MCS7830)");
|
|
MODULE_LICENSE("GPL");
|