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Greg Ungerer net: usbnet: support 64bit stats c8b5d12 Apr 3, 2017
15 contributors

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@jacmet @davem330 @fengguang @htejun @eecsninja @shaharha @paulgortmaker @jkivilin @JuliaLawall @JoePerches @jkrzyszt @herbertx @gregkh @DavidDecotigny @bwhacks
648 lines (531 sloc) 15.3 KB
/*
* Davicom DM96xx USB 10/100Mbps ethernet devices
*
* Peter Korsgaard <jacmet@sunsite.dk>
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
//#define DEBUG
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/stddef.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/crc32.h>
#include <linux/usb/usbnet.h>
#include <linux/slab.h>
/* datasheet:
http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf
*/
/* control requests */
#define DM_READ_REGS 0x00
#define DM_WRITE_REGS 0x01
#define DM_READ_MEMS 0x02
#define DM_WRITE_REG 0x03
#define DM_WRITE_MEMS 0x05
#define DM_WRITE_MEM 0x07
/* registers */
#define DM_NET_CTRL 0x00
#define DM_RX_CTRL 0x05
#define DM_SHARED_CTRL 0x0b
#define DM_SHARED_ADDR 0x0c
#define DM_SHARED_DATA 0x0d /* low + high */
#define DM_PHY_ADDR 0x10 /* 6 bytes */
#define DM_MCAST_ADDR 0x16 /* 8 bytes */
#define DM_GPR_CTRL 0x1e
#define DM_GPR_DATA 0x1f
#define DM_CHIP_ID 0x2c
#define DM_MODE_CTRL 0x91 /* only on dm9620 */
/* chip id values */
#define ID_DM9601 0
#define ID_DM9620 1
#define DM_MAX_MCAST 64
#define DM_MCAST_SIZE 8
#define DM_EEPROM_LEN 256
#define DM_TX_OVERHEAD 2 /* 2 byte header */
#define DM_RX_OVERHEAD 7 /* 3 byte header + 4 byte crc tail */
#define DM_TIMEOUT 1000
static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
{
int err;
err = usbnet_read_cmd(dev, DM_READ_REGS,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, reg, data, length);
if(err != length && err >= 0)
err = -EINVAL;
return err;
}
static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
{
return dm_read(dev, reg, 1, value);
}
static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data)
{
int err;
err = usbnet_write_cmd(dev, DM_WRITE_REGS,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, reg, data, length);
if (err >= 0 && err < length)
err = -EINVAL;
return err;
}
static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value)
{
return usbnet_write_cmd(dev, DM_WRITE_REG,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, reg, NULL, 0);
}
static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data)
{
usbnet_write_cmd_async(dev, DM_WRITE_REGS,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, reg, data, length);
}
static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
{
usbnet_write_cmd_async(dev, DM_WRITE_REG,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, reg, NULL, 0);
}
static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value)
{
int ret, i;
mutex_lock(&dev->phy_mutex);
dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);
for (i = 0; i < DM_TIMEOUT; i++) {
u8 tmp = 0;
udelay(1);
ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
if (ret < 0)
goto out;
/* ready */
if ((tmp & 1) == 0)
break;
}
if (i == DM_TIMEOUT) {
netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom");
ret = -EIO;
goto out;
}
dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
ret = dm_read(dev, DM_SHARED_DATA, 2, value);
netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n",
phy, reg, *value, ret);
out:
mutex_unlock(&dev->phy_mutex);
return ret;
}
static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
{
int ret, i;
mutex_lock(&dev->phy_mutex);
ret = dm_write(dev, DM_SHARED_DATA, 2, &value);
if (ret < 0)
goto out;
dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);
for (i = 0; i < DM_TIMEOUT; i++) {
u8 tmp = 0;
udelay(1);
ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
if (ret < 0)
goto out;
/* ready */
if ((tmp & 1) == 0)
break;
}
if (i == DM_TIMEOUT) {
netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom");
ret = -EIO;
goto out;
}
dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
out:
mutex_unlock(&dev->phy_mutex);
return ret;
}
static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
{
return dm_read_shared_word(dev, 0, offset, value);
}
static int dm9601_get_eeprom_len(struct net_device *dev)
{
return DM_EEPROM_LEN;
}
static int dm9601_get_eeprom(struct net_device *net,
struct ethtool_eeprom *eeprom, u8 * data)
{
struct usbnet *dev = netdev_priv(net);
__le16 *ebuf = (__le16 *) data;
int i;
/* access is 16bit */
if ((eeprom->offset % 2) || (eeprom->len % 2))
return -EINVAL;
for (i = 0; i < eeprom->len / 2; i++) {
if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i,
&ebuf[i]) < 0)
return -EINVAL;
}
return 0;
}
static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc)
{
struct usbnet *dev = netdev_priv(netdev);
__le16 res;
if (phy_id) {
netdev_dbg(dev->net, "Only internal phy supported\n");
return 0;
}
dm_read_shared_word(dev, 1, loc, &res);
netdev_dbg(dev->net,
"dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
phy_id, loc, le16_to_cpu(res));
return le16_to_cpu(res);
}
static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
int val)
{
struct usbnet *dev = netdev_priv(netdev);
__le16 res = cpu_to_le16(val);
if (phy_id) {
netdev_dbg(dev->net, "Only internal phy supported\n");
return;
}
netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
phy_id, loc, val);
dm_write_shared_word(dev, 1, loc, res);
}
static void dm9601_get_drvinfo(struct net_device *net,
struct ethtool_drvinfo *info)
{
/* Inherit standard device info */
usbnet_get_drvinfo(net, info);
}
static u32 dm9601_get_link(struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
return mii_link_ok(&dev->mii);
}
static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
{
struct usbnet *dev = netdev_priv(net);
return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
}
static const struct ethtool_ops dm9601_ethtool_ops = {
.get_drvinfo = dm9601_get_drvinfo,
.get_link = dm9601_get_link,
.get_msglevel = usbnet_get_msglevel,
.set_msglevel = usbnet_set_msglevel,
.get_eeprom_len = dm9601_get_eeprom_len,
.get_eeprom = dm9601_get_eeprom,
.nway_reset = usbnet_nway_reset,
.get_link_ksettings = usbnet_get_link_ksettings,
.set_link_ksettings = usbnet_set_link_ksettings,
};
static void dm9601_set_multicast(struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
/* We use the 20 byte dev->data for our 8 byte filter buffer
* to avoid allocating memory that is tricky to free later */
u8 *hashes = (u8 *) & dev->data;
u8 rx_ctl = 0x31;
memset(hashes, 0x00, DM_MCAST_SIZE);
hashes[DM_MCAST_SIZE - 1] |= 0x80; /* broadcast address */
if (net->flags & IFF_PROMISC) {
rx_ctl |= 0x02;
} else if (net->flags & IFF_ALLMULTI ||
netdev_mc_count(net) > DM_MAX_MCAST) {
rx_ctl |= 0x08;
} else if (!netdev_mc_empty(net)) {
struct netdev_hw_addr *ha;
netdev_for_each_mc_addr(ha, net) {
u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
hashes[crc >> 3] |= 1 << (crc & 0x7);
}
}
dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes);
dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
}
static void __dm9601_set_mac_address(struct usbnet *dev)
{
dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
}
static int dm9601_set_mac_address(struct net_device *net, void *p)
{
struct sockaddr *addr = p;
struct usbnet *dev = netdev_priv(net);
if (!is_valid_ether_addr(addr->sa_data)) {
dev_err(&net->dev, "not setting invalid mac address %pM\n",
addr->sa_data);
return -EINVAL;
}
memcpy(net->dev_addr, addr->sa_data, net->addr_len);
__dm9601_set_mac_address(dev);
return 0;
}
static const struct net_device_ops dm9601_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_get_stats64 = usbnet_get_stats64,
.ndo_validate_addr = eth_validate_addr,
.ndo_do_ioctl = dm9601_ioctl,
.ndo_set_rx_mode = dm9601_set_multicast,
.ndo_set_mac_address = dm9601_set_mac_address,
};
static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
{
int ret;
u8 mac[ETH_ALEN], id;
ret = usbnet_get_endpoints(dev, intf);
if (ret)
goto out;
dev->net->netdev_ops = &dm9601_netdev_ops;
dev->net->ethtool_ops = &dm9601_ethtool_ops;
dev->net->hard_header_len += DM_TX_OVERHEAD;
dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
/* dm9620/21a require room for 4 byte padding, even in dm9601
* mode, so we need +1 to be able to receive full size
* ethernet frames.
*/
dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1;
dev->mii.dev = dev->net;
dev->mii.mdio_read = dm9601_mdio_read;
dev->mii.mdio_write = dm9601_mdio_write;
dev->mii.phy_id_mask = 0x1f;
dev->mii.reg_num_mask = 0x1f;
/* reset */
dm_write_reg(dev, DM_NET_CTRL, 1);
udelay(20);
/* read MAC */
if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) {
printk(KERN_ERR "Error reading MAC address\n");
ret = -ENODEV;
goto out;
}
/*
* Overwrite the auto-generated address only with good ones.
*/
if (is_valid_ether_addr(mac))
memcpy(dev->net->dev_addr, mac, ETH_ALEN);
else {
printk(KERN_WARNING
"dm9601: No valid MAC address in EEPROM, using %pM\n",
dev->net->dev_addr);
__dm9601_set_mac_address(dev);
}
if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) {
netdev_err(dev->net, "Error reading chip ID\n");
ret = -ENODEV;
goto out;
}
/* put dm9620 devices in dm9601 mode */
if (id == ID_DM9620) {
u8 mode;
if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) {
netdev_err(dev->net, "Error reading MODE_CTRL\n");
ret = -ENODEV;
goto out;
}
dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
}
/* power up phy */
dm_write_reg(dev, DM_GPR_CTRL, 1);
dm_write_reg(dev, DM_GPR_DATA, 0);
/* receive broadcast packets */
dm9601_set_multicast(dev->net);
dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
mii_nway_restart(&dev->mii);
out:
return ret;
}
static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
u8 status;
int len;
/* format:
b1: rx status
b2: packet length (incl crc) low
b3: packet length (incl crc) high
b4..n-4: packet data
bn-3..bn: ethernet crc
*/
if (unlikely(skb->len < DM_RX_OVERHEAD)) {
dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
return 0;
}
status = skb->data[0];
len = (skb->data[1] | (skb->data[2] << 8)) - 4;
if (unlikely(status & 0xbf)) {
if (status & 0x01) dev->net->stats.rx_fifo_errors++;
if (status & 0x02) dev->net->stats.rx_crc_errors++;
if (status & 0x04) dev->net->stats.rx_frame_errors++;
if (status & 0x20) dev->net->stats.rx_missed_errors++;
if (status & 0x90) dev->net->stats.rx_length_errors++;
return 0;
}
skb_pull(skb, 3);
skb_trim(skb, len);
return 1;
}
static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
gfp_t flags)
{
int len, pad;
/* format:
b1: packet length low
b2: packet length high
b3..n: packet data
*/
len = skb->len + DM_TX_OVERHEAD;
/* workaround for dm962x errata with tx fifo getting out of
* sync if a USB bulk transfer retry happens right after a
* packet with odd / maxpacket length by adding up to 3 bytes
* padding.
*/
while ((len & 1) || !(len % dev->maxpacket))
len++;
len -= DM_TX_OVERHEAD; /* hw header doesn't count as part of length */
pad = len - skb->len;
if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) {
struct sk_buff *skb2;
skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags);
dev_kfree_skb_any(skb);
skb = skb2;
if (!skb)
return NULL;
}
__skb_push(skb, DM_TX_OVERHEAD);
if (pad) {
memset(skb->data + skb->len, 0, pad);
__skb_put(skb, pad);
}
skb->data[0] = len;
skb->data[1] = len >> 8;
return skb;
}
static void dm9601_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) {
usbnet_link_change(dev, link, 1);
netdev_dbg(dev->net, "Link Status is: %d\n", link);
}
}
static int dm9601_link_reset(struct usbnet *dev)
{
struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
mii_check_media(&dev->mii, 1, 1);
mii_ethtool_gset(&dev->mii, &ecmd);
netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n",
ethtool_cmd_speed(&ecmd), ecmd.duplex);
return 0;
}
static const struct driver_info dm9601_info = {
.description = "Davicom DM96xx USB 10/100 Ethernet",
.flags = FLAG_ETHER | FLAG_LINK_INTR,
.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,
},
{
USB_DEVICE(0x0fe6, 0x8101), /* DM9601 USB to Fast Ethernet Adapter */
.driver_info = (unsigned long)&dm9601_info,
},
{
USB_DEVICE(0x0fe6, 0x9700), /* DM9601 USB to Fast Ethernet Adapter */
.driver_info = (unsigned long)&dm9601_info,
},
{
USB_DEVICE(0x0a46, 0x9000), /* DM9000E */
.driver_info = (unsigned long)&dm9601_info,
},
{
USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */
.driver_info = (unsigned long)&dm9601_info,
},
{
USB_DEVICE(0x0a46, 0x9621), /* DM9621A USB to Fast Ethernet Adapter */
.driver_info = (unsigned long)&dm9601_info,
},
{
USB_DEVICE(0x0a46, 0x9622), /* DM9622 USB to Fast Ethernet Adapter */
.driver_info = (unsigned long)&dm9601_info,
},
{
USB_DEVICE(0x0a46, 0x0269), /* DM962OA USB to Fast Ethernet Adapter */
.driver_info = (unsigned long)&dm9601_info,
},
{
USB_DEVICE(0x0a46, 0x1269), /* DM9621A USB to Fast Ethernet Adapter */
.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,
.disable_hub_initiated_lpm = 1,
};
module_usb_driver(dm9601_driver);
MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices");
MODULE_LICENSE("GPL");
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