diff options
Diffstat (limited to 'drivers/net/usb/dm9601.c')
| -rw-r--r-- | drivers/net/usb/dm9601.c | 619 |
1 files changed, 619 insertions, 0 deletions
diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c new file mode 100644 index 00000000000..a6763860147 --- /dev/null +++ b/drivers/net/usb/dm9601.c @@ -0,0 +1,619 @@ +/* + * Davicom DM9601 USB 1.1 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/init.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 "usbnet.h" + +/* datasheet: + http://www.davicom.com.tw/big5/download/Data%20Sheet/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_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) +{ + devdbg(dev, "dm_read() reg=0x%02x length=%d", reg, length); + return usb_control_msg(dev->udev, + usb_rcvctrlpipe(dev->udev, 0), + DM_READ_REGS, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, reg, data, length, USB_CTRL_SET_TIMEOUT); +} + +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) +{ + devdbg(dev, "dm_write() reg=0x%02x, length=%d", reg, length); + return usb_control_msg(dev->udev, + usb_sndctrlpipe(dev->udev, 0), + DM_WRITE_REGS, + USB_DIR_OUT | USB_TYPE_VENDOR |USB_RECIP_DEVICE, + 0, reg, data, length, USB_CTRL_SET_TIMEOUT); +} + +static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value) +{ + devdbg(dev, "dm_write_reg() reg=0x%02x, value=0x%02x", reg, value); + return usb_control_msg(dev->udev, + usb_sndctrlpipe(dev->udev, 0), + DM_WRITE_REG, + USB_DIR_OUT | USB_TYPE_VENDOR |USB_RECIP_DEVICE, + value, reg, NULL, 0, USB_CTRL_SET_TIMEOUT); +} + +static void dm_write_async_callback(struct urb *urb) +{ + struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; + + if (urb->status < 0) + printk(KERN_DEBUG "dm_write_async_callback() failed with %d", + urb->status); + + kfree(req); + usb_free_urb(urb); +} + +static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data) +{ + struct usb_ctrlrequest *req; + struct urb *urb; + int status; + + devdbg(dev, "dm_write_async() reg=0x%02x length=%d", reg, length); + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) { + deverr(dev, "Error allocating URB in dm_write_async!"); + return; + } + + req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); + if (!req) { + deverr(dev, "Failed to allocate memory for control request"); + usb_free_urb(urb); + return; + } + + req->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE; + req->bRequest = DM_WRITE_REGS; + req->wValue = 0; + req->wIndex = cpu_to_le16(reg); + req->wLength = cpu_to_le16(length); + + usb_fill_control_urb(urb, dev->udev, + usb_sndctrlpipe(dev->udev, 0), + (void *)req, data, length, + dm_write_async_callback, req); + + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status < 0) { + deverr(dev, "Error submitting the control message: status=%d", + status); + kfree(req); + usb_free_urb(urb); + } +} + +static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value) +{ + struct usb_ctrlrequest *req; + struct urb *urb; + int status; + + devdbg(dev, "dm_write_reg_async() reg=0x%02x value=0x%02x", + reg, value); + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) { + deverr(dev, "Error allocating URB in dm_write_async!"); + return; + } + + req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); + if (!req) { + deverr(dev, "Failed to allocate memory for control request"); + usb_free_urb(urb); + return; + } + + req->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE; + req->bRequest = DM_WRITE_REG; + req->wValue = cpu_to_le16(value); + req->wIndex = cpu_to_le16(reg); + req->wLength = 0; + + usb_fill_control_urb(urb, dev->udev, + usb_sndctrlpipe(dev->udev, 0), + (void *)req, NULL, 0, dm_write_async_callback, req); + + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status < 0) { + deverr(dev, "Error submitting the control message: status=%d", + status); + kfree(req); + usb_free_urb(urb); + } +} + +static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, u16 *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; + + 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) { + deverr(dev, "%s read timed out!", phy ? "phy" : "eeprom"); + ret = -EIO; + goto out; + } + + dm_write_reg(dev, DM_SHARED_CTRL, 0x0); + ret = dm_read(dev, DM_SHARED_DATA, 2, value); + + devdbg(dev, "read shared %d 0x%02x returned 0x%04x, %d", + 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, u16 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 ? 0x1c : 0x14); + + for (i = 0; i < DM_TIMEOUT; i++) { + u8 tmp; + + 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) { + deverr(dev, "%s write timed out!", 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); + u16 *ebuf = (u16 *) 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); + + u16 res; + + if (phy_id) { + devdbg(dev, "Only internal phy supported"); + return 0; + } + + dm_read_shared_word(dev, 1, loc, &res); + + devdbg(dev, + "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x", + 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); + u16 res = cpu_to_le16(val); + + if (phy_id) { + devdbg(dev, "Only internal phy supported"); + return; + } + + devdbg(dev,"dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x", + 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); + info->eedump_len = DM_EEPROM_LEN; +} + +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 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, + .get_settings = usbnet_get_settings, + .set_settings = usbnet_set_settings, + .nway_reset = usbnet_nway_reset, +}; + +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 = 0x01; + + 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 || net->mc_count > DM_MAX_MCAST) { + rx_ctl |= 0x04; + } else if (net->mc_count) { + struct dev_mc_list *mc_list = net->mc_list; + int i; + + for (i = 0; i < net->mc_count; i++) { + u32 crc = ether_crc(ETH_ALEN, mc_list->dmi_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 int dm9601_bind(struct usbnet *dev, struct usb_interface *intf) +{ + int ret; + + ret = usbnet_get_endpoints(dev, intf); + if (ret) + goto out; + + dev->net->do_ioctl = dm9601_ioctl; + dev->net->set_multicast_list = dm9601_set_multicast; + 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; + dev->rx_urb_size = dev->net->mtu + DM_RX_OVERHEAD; + + 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 */ + ret = dm_write_reg(dev, DM_NET_CTRL, 1); + udelay(20); + + /* read MAC */ + ret = dm_read(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr); + if (ret < 0) { + printk(KERN_ERR "Error reading MAC address\n"); + ret = -ENODEV; + goto out; + } + + + /* 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: + b0: rx status + b1: packet length (incl crc) low + b2: packet length (incl crc) high + b3..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->stats.rx_fifo_errors++; + if (status & 0x02) dev->stats.rx_crc_errors++; + if (status & 0x04) dev->stats.rx_frame_errors++; + if (status & 0x20) dev->stats.rx_missed_errors++; + if (status & 0x90) dev->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; + + /* format: + b0: packet length low + b1: packet length high + b3..n: packet data + */ + + if (skb_headroom(skb) < DM_TX_OVERHEAD) { + struct sk_buff *skb2; + + skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, 0, flags); + dev_kfree_skb_any(skb); + skb = skb2; + if (!skb) + return NULL; + } + + __skb_push(skb, DM_TX_OVERHEAD); + + len = skb->len; + /* usbnet adds padding if length is a multiple of packet size + if so, adjust length value in header */ + if ((len % dev->maxpacket) == 0) + len++; + + 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) { + 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, + }, + {}, // 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"); |