598 lines
14 KiB
C
598 lines
14 KiB
C
/*
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* Davicom DM9601 USB 1.1 10/100Mbps ethernet devices
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*
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* Peter Korsgaard <jacmet@sunsite.dk>
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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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/* datasheet:
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http://www.davicom.com.tw/big5/download/Data%20Sheet/DM9601-DS-P01-930914.pdf
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*/
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/* control requests */
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#define DM_READ_REGS 0x00
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#define DM_WRITE_REGS 0x01
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#define DM_READ_MEMS 0x02
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#define DM_WRITE_REG 0x03
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#define DM_WRITE_MEMS 0x05
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#define DM_WRITE_MEM 0x07
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/* registers */
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#define DM_NET_CTRL 0x00
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#define DM_RX_CTRL 0x05
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#define DM_SHARED_CTRL 0x0b
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#define DM_SHARED_ADDR 0x0c
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#define DM_SHARED_DATA 0x0d /* low + high */
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#define DM_PHY_ADDR 0x10 /* 6 bytes */
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#define DM_MCAST_ADDR 0x16 /* 8 bytes */
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#define DM_GPR_CTRL 0x1e
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#define DM_GPR_DATA 0x1f
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#define DM_MAX_MCAST 64
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#define DM_MCAST_SIZE 8
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#define DM_EEPROM_LEN 256
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#define DM_TX_OVERHEAD 2 /* 2 byte header */
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#define DM_RX_OVERHEAD 7 /* 3 byte header + 4 byte crc tail */
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#define DM_TIMEOUT 1000
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static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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devdbg(dev, "dm_read() reg=0x%02x length=%d", reg, length);
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return usb_control_msg(dev->udev,
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usb_rcvctrlpipe(dev->udev, 0),
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DM_READ_REGS,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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0, reg, data, length, USB_CTRL_SET_TIMEOUT);
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}
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static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
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{
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return dm_read(dev, reg, 1, value);
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}
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static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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devdbg(dev, "dm_write() reg=0x%02x, length=%d", reg, length);
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return usb_control_msg(dev->udev,
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usb_sndctrlpipe(dev->udev, 0),
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DM_WRITE_REGS,
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USB_DIR_OUT | USB_TYPE_VENDOR |USB_RECIP_DEVICE,
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0, reg, data, length, USB_CTRL_SET_TIMEOUT);
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}
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static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value)
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{
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devdbg(dev, "dm_write_reg() reg=0x%02x, value=0x%02x", reg, value);
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return usb_control_msg(dev->udev,
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usb_sndctrlpipe(dev->udev, 0),
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DM_WRITE_REG,
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USB_DIR_OUT | USB_TYPE_VENDOR |USB_RECIP_DEVICE,
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value, reg, NULL, 0, USB_CTRL_SET_TIMEOUT);
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}
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static void dm_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 "dm_write_async_callback() failed with %d\n",
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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 dm_write_async_helper(struct usbnet *dev, u8 reg, u8 value,
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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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deverr(dev, "Error allocating URB in dm_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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deverr(dev, "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 = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
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req->bRequest = length ? DM_WRITE_REGS : DM_WRITE_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,
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usb_sndctrlpipe(dev->udev, 0),
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(void *)req, data, length,
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dm_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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deverr(dev, "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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}
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static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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devdbg(dev, "dm_write_async() reg=0x%02x length=%d", reg, length);
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dm_write_async_helper(dev, reg, 0, length, data);
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}
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static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
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{
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devdbg(dev, "dm_write_reg_async() reg=0x%02x value=0x%02x",
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reg, value);
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dm_write_async_helper(dev, reg, value, 0, NULL);
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}
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static int dm_read_shared_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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dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
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dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);
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for (i = 0; i < DM_TIMEOUT; i++) {
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u8 tmp;
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udelay(1);
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ret = dm_read_reg(dev, DM_SHARED_CTRL, &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 == DM_TIMEOUT) {
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deverr(dev, "%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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dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
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ret = dm_read(dev, DM_SHARED_DATA, 2, value);
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devdbg(dev, "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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static int dm_write_shared_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 = dm_write(dev, DM_SHARED_DATA, 2, &value);
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if (ret < 0)
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goto out;
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dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
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dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1c : 0x14);
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for (i = 0; i < DM_TIMEOUT; i++) {
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u8 tmp;
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udelay(1);
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ret = dm_read_reg(dev, DM_SHARED_CTRL, &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 == DM_TIMEOUT) {
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deverr(dev, "%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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dm_write_reg(dev, DM_SHARED_CTRL, 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 dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
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{
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return dm_read_shared_word(dev, 0, offset, value);
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}
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static int dm9601_get_eeprom_len(struct net_device *dev)
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{
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return DM_EEPROM_LEN;
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}
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static int dm9601_get_eeprom(struct net_device *net,
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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 (dm_read_eeprom_word(dev, eeprom->offset / 2 + i,
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&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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static int dm9601_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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devdbg(dev, "Only internal phy supported");
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return 0;
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}
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dm_read_shared_word(dev, 1, loc, &res);
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devdbg(dev,
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"dm9601_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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static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
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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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devdbg(dev, "Only internal phy supported");
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return;
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}
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devdbg(dev,"dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x",
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phy_id, loc, val);
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dm_write_shared_word(dev, 1, loc, res);
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}
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static void dm9601_get_drvinfo(struct net_device *net,
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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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info->eedump_len = DM_EEPROM_LEN;
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}
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static u32 dm9601_get_link(struct net_device *net)
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{
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struct usbnet *dev = netdev_priv(net);
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return mii_link_ok(&dev->mii);
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}
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static int dm9601_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 dm9601_ethtool_ops = {
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.get_drvinfo = dm9601_get_drvinfo,
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.get_link = dm9601_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 = dm9601_get_eeprom_len,
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.get_eeprom = dm9601_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 dm9601_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;
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memset(hashes, 0x00, DM_MCAST_SIZE);
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hashes[DM_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 || net->mc_count > DM_MAX_MCAST) {
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rx_ctl |= 0x04;
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} else if (net->mc_count) {
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struct dev_mc_list *mc_list = net->mc_list;
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int i;
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for (i = 0; i < net->mc_count; i++) {
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u32 crc = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
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hashes[crc >> 3] |= 1 << (crc & 0x7);
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}
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}
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dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes);
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dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
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}
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static int dm9601_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->do_ioctl = dm9601_ioctl;
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dev->net->set_multicast_list = dm9601_set_multicast;
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dev->net->ethtool_ops = &dm9601_ethtool_ops;
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dev->net->hard_header_len += DM_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 + DM_RX_OVERHEAD;
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dev->mii.dev = dev->net;
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dev->mii.mdio_read = dm9601_mdio_read;
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dev->mii.mdio_write = dm9601_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 */
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dm_write_reg(dev, DM_NET_CTRL, 1);
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udelay(20);
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/* read MAC */
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if (dm_read(dev, DM_PHY_ADDR, 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 phy */
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dm_write_reg(dev, DM_GPR_CTRL, 1);
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dm_write_reg(dev, DM_GPR_DATA, 0);
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/* receive broadcast packets */
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dm9601_set_multicast(dev->net);
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dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
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dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
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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 dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
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{
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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 < DM_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) dev->stats.rx_fifo_errors++;
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if (status & 0x02) dev->stats.rx_crc_errors++;
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if (status & 0x04) dev->stats.rx_frame_errors++;
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if (status & 0x20) dev->stats.rx_missed_errors++;
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if (status & 0x90) dev->stats.rx_length_errors++;
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return 0;
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}
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skb_pull(skb, 3);
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skb_trim(skb, len);
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return 1;
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}
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static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
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gfp_t flags)
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{
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int len;
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/* format:
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b0: packet length low
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b1: packet length high
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b3..n: packet data
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*/
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len = skb->len;
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if (skb_headroom(skb) < DM_TX_OVERHEAD) {
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struct sk_buff *skb2;
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skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, 0, flags);
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dev_kfree_skb_any(skb);
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skb = skb2;
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if (!skb)
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return NULL;
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}
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__skb_push(skb, DM_TX_OVERHEAD);
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/* usbnet adds padding if length is a multiple of packet size
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if so, adjust length value in header */
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if ((skb->len % dev->maxpacket) == 0)
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len++;
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skb->data[0] = len;
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skb->data[1] = len >> 8;
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return skb;
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}
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static void dm9601_status(struct usbnet *dev, struct urb *urb)
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{
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int link;
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u8 *buf;
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/* format:
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b0: net status
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b1: tx status 1
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b2: tx status 2
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b3: rx status
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b4: rx overflow
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b5: rx count
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b6: tx count
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b7: gpr
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*/
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if (urb->actual_length < 8)
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return;
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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);
|
|
devdbg(dev, "Link Status is: %d", link);
|
|
}
|
|
}
|
|
|
|
static int dm9601_link_reset(struct usbnet *dev)
|
|
{
|
|
struct ethtool_cmd ecmd;
|
|
|
|
mii_check_media(&dev->mii, 1, 1);
|
|
mii_ethtool_gset(&dev->mii, &ecmd);
|
|
|
|
devdbg(dev, "link_reset() speed: %d duplex: %d",
|
|
ecmd.speed, ecmd.duplex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct driver_info dm9601_info = {
|
|
.description = "Davicom DM9601 USB Ethernet",
|
|
.flags = FLAG_ETHER,
|
|
.bind = dm9601_bind,
|
|
.rx_fixup = dm9601_rx_fixup,
|
|
.tx_fixup = dm9601_tx_fixup,
|
|
.status = dm9601_status,
|
|
.link_reset = dm9601_link_reset,
|
|
.reset = dm9601_link_reset,
|
|
};
|
|
|
|
static const struct usb_device_id products[] = {
|
|
{
|
|
USB_DEVICE(0x07aa, 0x9601), /* Corega FEther USB-TXC */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x9601), /* Davicom USB-100 */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x6688), /* ZT6688 USB NIC */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x0268), /* ShanTou ST268 USB NIC */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x8515), /* ADMtek ADM8515 USB NIC */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a47, 0x9601), /* Hirose USB-100 */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{}, // END
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, products);
|
|
|
|
static struct usb_driver dm9601_driver = {
|
|
.name = "dm9601",
|
|
.id_table = products,
|
|
.probe = usbnet_probe,
|
|
.disconnect = usbnet_disconnect,
|
|
.suspend = usbnet_suspend,
|
|
.resume = usbnet_resume,
|
|
};
|
|
|
|
static int __init dm9601_init(void)
|
|
{
|
|
return usb_register(&dm9601_driver);
|
|
}
|
|
|
|
static void __exit dm9601_exit(void)
|
|
{
|
|
usb_deregister(&dm9601_driver);
|
|
}
|
|
|
|
module_init(dm9601_init);
|
|
module_exit(dm9601_exit);
|
|
|
|
MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
|
|
MODULE_DESCRIPTION("Davicom DM9601 USB 1.1 ethernet devices");
|
|
MODULE_LICENSE("GPL");
|