626 lines
14 KiB
C
Executable File
626 lines
14 KiB
C
Executable File
/*
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* QF9700 one chip USB 1.1 ethernet devices
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*
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* Author : jokeliujl <jokeliu@163.com>
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* Date : 2010-10-01
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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//#define DEBUG
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/stddef.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/usb.h>
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#include <linux/crc32.h>
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#include <linux/usb/usbnet.h>
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#include "qf9700.h"
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static const char driver_name[] = "qf9700";
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/* ------------------------------------------------------------------------------------------ */
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/* qf9700 mac and phy operations */
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/* qf9700 read some registers from MAC */
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static int qf_read(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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void *buf;
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int err = -ENOMEM;
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netdev_dbg(dev->net, "qf_read() reg=0x%02x length=%d", reg, length);
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buf = kmalloc(length, GFP_KERNEL);
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if (!buf)
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goto out;
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err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
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QF_RD_REGS, QF_REQ_RD_REG,
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0, reg, buf, length, USB_CTRL_SET_TIMEOUT);
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if (err == length)
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memcpy(data, buf, length);
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else if (err >= 0)
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err = -EINVAL;
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kfree(buf);
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out:
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return err;
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}
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/* qf9700 write some registers to MAC */
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static int qf_write(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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void *buf = NULL;
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int err = -ENOMEM;
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netdev_dbg(dev->net, "qf_write() reg=0x%02x, length=%d", reg, length);
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if (data) {
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buf = kmemdup(data, length, GFP_KERNEL);
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if (!buf)
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goto out;
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}
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err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
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QF_WR_REGS, QF_REQ_WR_REG,
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0, reg, buf, length, USB_CTRL_SET_TIMEOUT);
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kfree(buf);
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if (err >= 0 && err < length)
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err = -EINVAL;
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out:
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return err;
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}
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/* qf9700 read one register from MAC */
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static int qf_read_reg(struct usbnet *dev, u8 reg, u8 *value)
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{
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return qf_read(dev, reg, 1, value);
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}
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/* qf9700 write one register to MAC */
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static int qf_write_reg(struct usbnet *dev, u8 reg, u8 value)
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{
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netdev_dbg(dev->net, "qf_write_reg() reg=0x%02x, value=0x%02x", reg, value);
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return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
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QF_WR_REG, QF_REQ_WR_REG,
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value, reg, NULL, 0, USB_CTRL_SET_TIMEOUT);
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}
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/* async mode for writing registers or reg blocks */
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static void qf_write_async_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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if (urb->status < 0)
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printk(KERN_DEBUG "qf_write_async_callback() failed with %d\n", urb->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 qf_write_async_helper(struct usbnet *dev, u8 reg, u8 value, u16 length, void *data)
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{
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struct usb_ctrlrequest *req;
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struct urb *urb;
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int status;
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb) {
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netdev_err(dev->net, "Error allocating URB in qf_write_async_helper!");
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return;
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}
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req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
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if (!req) {
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netdev_err(dev->net, "Failed to allocate memory for control request");
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usb_free_urb(urb);
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return;
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}
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req->bRequestType = QF_REQ_WR_REG;
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req->bRequest = length ? QF_WR_REGS : QF_WR_REG;
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req->wValue = cpu_to_le16(value);
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req->wIndex = cpu_to_le16(reg);
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req->wLength = cpu_to_le16(length);
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usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
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(void *)req, data, length,
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qf_write_async_callback, req);
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status = usb_submit_urb(urb, GFP_ATOMIC);
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if (status < 0) {
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netdev_err(dev->net, "Error submitting the control message: status=%d",
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status);
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kfree(req);
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usb_free_urb(urb);
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}
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return;
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}
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static void qf_write_async(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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netdev_dbg(dev->net, "qf_write_async() reg=0x%02x length=%d", reg, length);
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qf_write_async_helper(dev, reg, 0, length, data);
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}
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static void qf_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
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{
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netdev_dbg(dev->net, "qf_write_reg_async() reg=0x%02x value=0x%02x", reg, value);
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qf_write_async_helper(dev, reg, value, 0, NULL);
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}
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/* qf9700 read one word from phy or eeprom */
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static int qf_share_read_word(struct usbnet *dev, int phy, u8 reg, __le16 *value)
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{
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int ret, i;
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mutex_lock(&dev->phy_mutex);
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qf_write_reg(dev, EPAR, phy ? (reg | 0x40) : reg);
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qf_write_reg(dev, EPCR, phy ? 0xc : 0x4);
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for (i = 0; i < QF_SHARE_TIMEOUT; i++) {
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u8 tmp;
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udelay(1);
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ret = qf_read_reg(dev, EPCR, &tmp);
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if (ret < 0)
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goto out;
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/* ready */
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if ((tmp & 1) == 0)
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break;
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}
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if (i >= QF_SHARE_TIMEOUT) {
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netdev_err(dev->net, "%s read timed out!", phy ? "phy" : "eeprom");
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ret = -EIO;
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goto out;
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}
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qf_write_reg(dev, EPCR, 0x0);
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ret = qf_read(dev, EPDR, 2, value);
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netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d",
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phy, reg, *value, ret);
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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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/* write one word to phy or eeprom */
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static int qf_share_write_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
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{
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int ret, i;
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mutex_lock(&dev->phy_mutex);
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ret = qf_write(dev, EPDR, 2, &value);
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if (ret < 0)
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goto out;
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qf_write_reg(dev, EPAR, phy ? (reg | 0x40) : reg);
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qf_write_reg(dev, EPCR, phy ? 0x1a : 0x12);
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for (i = 0; i < QF_SHARE_TIMEOUT; i++) {
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u8 tmp;
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udelay(1);
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ret = qf_read_reg(dev, EPCR, &tmp);
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if (ret < 0)
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goto out;
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/* ready */
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if ((tmp & 1) == 0)
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break;
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}
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if (i >= QF_SHARE_TIMEOUT) {
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netdev_err(dev->net, "%s write timed out!", phy ? "phy" : "eeprom");
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ret = -EIO;
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goto out;
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}
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qf_write_reg(dev, EPCR, 0x0);
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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 qf_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
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{
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return qf_share_read_word(dev, 0, offset, value);
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}
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static int qf9700_get_eeprom_len(struct net_device *dev)
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{
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return QF_EEPROM_LEN;
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}
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/* get qf9700 eeprom information */
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static int qf9700_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, u8 * data)
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{
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struct usbnet *dev = netdev_priv(net);
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__le16 *ebuf = (__le16 *) data;
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int i;
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/* access is 16bit */
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if ((eeprom->offset % 2) || (eeprom->len % 2))
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return -EINVAL;
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for (i = 0; i < eeprom->len / 2; i++) {
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if (qf_read_eeprom_word(dev, eeprom->offset / 2 + i, &ebuf[i]) < 0)
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return -EINVAL;
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}
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return 0;
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}
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/* qf9700 mii-phy register read by word */
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static int qf9700_mdio_read(struct net_device *netdev, int phy_id, int loc)
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{
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struct usbnet *dev = netdev_priv(netdev);
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__le16 res;
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if (phy_id) {
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netdev_dbg(dev->net, "Only internal phy supported");
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return 0;
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}
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qf_share_read_word(dev, 1, loc, &res);
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netdev_dbg(dev->net,
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"qf9700_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x",
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phy_id, loc, le16_to_cpu(res));
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return le16_to_cpu(res);
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}
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/* qf9700 mii-phy register write by word */
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static void qf9700_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
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{
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struct usbnet *dev = netdev_priv(netdev);
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__le16 res = cpu_to_le16(val);
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if (phy_id) {
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netdev_dbg(dev->net, "Only internal phy supported");
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return;
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}
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netdev_dbg(dev->net,"qf9700_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x",
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phy_id, loc, val);
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qf_share_write_word(dev, 1, loc, res);
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}
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/*-------------------------------------------------------------------------------------------*/
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static void qf9700_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
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{
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/* Inherit standard device info */
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usbnet_get_drvinfo(net, info);
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strncpy (info->driver, driver_name, sizeof info->driver);
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info->eedump_len = QF_EEPROM_LEN;
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}
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static u32 qf9700_get_link(struct net_device *net)
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{
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struct usbnet *dev = netdev_priv(net);
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int rc = 0;
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u8 value = 0;
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#if 0
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rc = mii_link_ok(&dev->mii);
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#else
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qf_read_reg(dev, NSR, &value);
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if(value & NQF_LINKST) {
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rc = 1;
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}
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#endif
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return rc;
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}
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static int qf9700_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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static struct ethtool_ops qf9700_ethtool_ops = {
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.get_drvinfo = qf9700_get_drvinfo,
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.get_link = qf9700_get_link,
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.get_msglevel = usbnet_get_msglevel,
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.set_msglevel = usbnet_set_msglevel,
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.get_eeprom_len = qf9700_get_eeprom_len,
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.get_eeprom = qf9700_get_eeprom,
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.get_settings = usbnet_get_settings,
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.set_settings = usbnet_set_settings,
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.nway_reset = usbnet_nway_reset,
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};
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static void qf9700_set_multicast(struct net_device *net)
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{
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struct usbnet *dev = netdev_priv(net);
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/* We use the 20 byte dev->data for our 8 byte filter buffer
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* to avoid allocating memory that is tricky to free later */
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u8 *hashes = (u8 *) & dev->data;
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u8 rx_ctl = 0x31; // enable, disable_long, disable_crc
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memset(hashes, 0x00, QF_MCAST_SIZE);
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hashes[QF_MCAST_SIZE - 1] |= 0x80; /* broadcast address */
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if (net->flags & IFF_PROMISC) {
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rx_ctl |= 0x02;
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} else if (net->flags & IFF_ALLMULTI ||
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netdev_mc_count(net) > QF_MCAST_MAX) {
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rx_ctl |= 0x04;
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} else if (netdev_mc_count(net)) {
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struct netdev_hw_addr *ha;
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netdev_for_each_mc_addr(ha, net){
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u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
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hashes[crc >> 3] |= 1 << (crc & 0x7);
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}
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}
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qf_write_async(dev, MAR, QF_MCAST_SIZE, hashes);
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qf_write_reg_async(dev, RCR, rx_ctl);
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}
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static int qf9700_set_mac_address(struct net_device *net, void *p)
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{
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struct sockaddr *addr = p;
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struct usbnet *dev = netdev_priv(net);
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if(netif_running(net))
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return -EBUSY;
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if(!is_valid_ether_addr(addr->sa_data)){
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dev_err(&net->dev, "not setting invalid mac address %pM\n", addr->sa_data);
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return -EADDRNOTAVAIL;
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}
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memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
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qf_write_async(dev, PAR, ETH_ALEN, addr->sa_data);
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return 0;
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}
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static const struct net_device_ops qf9700_netdev_ops = {
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.ndo_open = usbnet_open,
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.ndo_stop = usbnet_stop,
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.ndo_start_xmit = usbnet_start_xmit,
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.ndo_tx_timeout = usbnet_tx_timeout,
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.ndo_change_mtu = usbnet_change_mtu,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_do_ioctl = qf9700_ioctl,
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.ndo_set_mac_address = qf9700_set_mac_address,
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.ndo_set_rx_mode = qf9700_set_multicast,
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};
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static int qf9700_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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int ret;
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ret = usbnet_get_endpoints(dev, intf);
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if (ret)
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goto out;
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dev->net->ethtool_ops = &qf9700_ethtool_ops;
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dev->net->netdev_ops = &qf9700_netdev_ops;
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dev->net->hard_header_len += QF_TX_OVERHEAD;
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dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
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dev->rx_urb_size = dev->net->mtu + ETH_HLEN + QF_RX_OVERHEAD;
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dev->mii.dev = dev->net;
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dev->mii.mdio_read = qf9700_mdio_read;
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dev->mii.mdio_write = qf9700_mdio_write;
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dev->mii.phy_id_mask = 0x1f;
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dev->mii.reg_num_mask = 0x1f;
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/* reset the qf9700 */
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qf_write_reg(dev, NCR, 1);
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udelay(20);
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/* read MAC */
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if (qf_read(dev, PAR, ETH_ALEN, dev->net->dev_addr) < 0) {
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printk(KERN_ERR "Error reading MAC address\n");
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ret = -ENODEV;
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goto out;
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}
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/* power up and reset phy */
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qf_write_reg(dev, PRR, 1);
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mdelay(20 ); // at least 10ms, here 20ms for safe
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qf_write_reg(dev, PRR, 0);
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mdelay(2); // at least 1ms, here 2ms for reading right register
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/* receive broadcast packets */
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qf9700_set_multicast(dev->net);
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qf9700_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
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qf9700_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
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mii_nway_restart(&dev->mii);
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out:
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return ret;
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}
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static int qf9700_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
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{
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struct net_device *netdev = dev->net;
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u8 status;
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int len;
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/* format:
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b0: rx status
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b1: packet length (incl crc) low
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b2: packet length (incl crc) high
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b3..n-4: packet data
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bn-3..bn: ethernet crc
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*/
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if (unlikely(skb->len < QF_RX_OVERHEAD)) {
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dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
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return 0;
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}
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status = skb->data[0];
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len = (skb->data[1] | (skb->data[2] << 8)) - 4;
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if (unlikely(status & 0xbf)) {
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if (status & 0x01) netdev->stats.rx_fifo_errors++;
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if (status & 0x02) netdev->stats.rx_crc_errors++;
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if (status & 0x04) netdev->stats.rx_frame_errors++;
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if (status & 0x20) netdev->stats.rx_missed_errors++;
|
|
if (status & 0x90) netdev->stats.rx_length_errors++;
|
|
return 0;
|
|
}
|
|
|
|
skb_pull(skb, 3);
|
|
skb_trim(skb, len);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct sk_buff *qf9700_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
|
|
{
|
|
int len;
|
|
|
|
/* format:
|
|
b0: packet length low
|
|
b1: packet length high
|
|
b3..n: packet data
|
|
*/
|
|
|
|
len = skb->len;
|
|
|
|
if (skb_headroom(skb) < QF_TX_OVERHEAD) {
|
|
struct sk_buff *skb2;
|
|
|
|
skb2 = skb_copy_expand(skb, QF_TX_OVERHEAD, 0, flags);
|
|
dev_kfree_skb_any(skb);
|
|
skb = skb2;
|
|
if (!skb)
|
|
return NULL;
|
|
}
|
|
|
|
__skb_push(skb, QF_TX_OVERHEAD);
|
|
|
|
/* usbnet adds padding if length is a multiple of packet size
|
|
if so, adjust length value in header */
|
|
if ((skb->len % dev->maxpacket) == 0)
|
|
len++;
|
|
|
|
skb->data[0] = len;
|
|
skb->data[1] = len >> 8;
|
|
|
|
return skb;
|
|
}
|
|
|
|
static void qf9700_status(struct usbnet *dev, struct urb *urb)
|
|
{
|
|
int link;
|
|
u8 *buf;
|
|
|
|
/* format:
|
|
b0: net status
|
|
b1: tx status 1
|
|
b2: tx status 2
|
|
b3: rx status
|
|
b4: rx overflow
|
|
b5: rx count
|
|
b6: tx count
|
|
b7: gpr
|
|
*/
|
|
|
|
if (urb->actual_length < 8)
|
|
return;
|
|
|
|
buf = urb->transfer_buffer;
|
|
|
|
link = !!(buf[0] & 0x40);
|
|
if (netif_carrier_ok(dev->net) != link) {
|
|
if (link) {
|
|
netif_carrier_on(dev->net);
|
|
usbnet_defer_kevent (dev, EVENT_LINK_RESET);
|
|
}else
|
|
netif_carrier_off(dev->net);
|
|
netdev_dbg(dev->net, "Link Status is: %d", link);
|
|
}
|
|
}
|
|
|
|
static int qf9700_link_reset(struct usbnet *dev)
|
|
{
|
|
struct ethtool_cmd ecmd;
|
|
|
|
mii_check_media(&dev->mii, 1, 1);
|
|
mii_ethtool_gset(&dev->mii, &ecmd);
|
|
|
|
netdev_dbg(dev->net, "link_reset() speed: %d duplex: %d",
|
|
ecmd.speed, ecmd.duplex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct driver_info qf9700_info = {
|
|
.description = "QF9700 USB Ethernet",
|
|
.flags = FLAG_ETHER,
|
|
.bind = qf9700_bind,
|
|
.rx_fixup = qf9700_rx_fixup,
|
|
.tx_fixup = qf9700_tx_fixup,
|
|
.status = qf9700_status,
|
|
.link_reset = qf9700_link_reset,
|
|
.reset = qf9700_link_reset,
|
|
};
|
|
|
|
static const struct usb_device_id products[] = {
|
|
{
|
|
USB_DEVICE(0x0fe6, 0x9700), /* QF9700 */
|
|
.driver_info = (unsigned long)&qf9700_info,
|
|
},
|
|
{}, // END
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, products);
|
|
|
|
static struct usb_driver qf9700_driver = {
|
|
.name = "qf9700",
|
|
.id_table = products,
|
|
.probe = usbnet_probe,
|
|
.disconnect = usbnet_disconnect,
|
|
.suspend = usbnet_suspend,
|
|
.resume = usbnet_resume,
|
|
};
|
|
|
|
static int __init qf9700_init(void)
|
|
{
|
|
return usb_register(&qf9700_driver);
|
|
}
|
|
|
|
static void __exit qf9700_exit(void)
|
|
{
|
|
usb_deregister(&qf9700_driver);
|
|
}
|
|
|
|
module_init(qf9700_init);
|
|
module_exit(qf9700_exit);
|
|
|
|
MODULE_AUTHOR("jokeliu <jokeliu@163.com>");
|
|
MODULE_DESCRIPTION("QF9700 one chip USB 2.0 ethernet devices");
|
|
MODULE_LICENSE("GPL");
|