diff options
Diffstat (limited to 'drivers/net/usb/pegasus.c')
| -rw-r--r-- | drivers/net/usb/pegasus.c | 1362 |
1 files changed, 1362 insertions, 0 deletions
diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c new file mode 100644 index 000000000..138279bbb --- /dev/null +++ b/drivers/net/usb/pegasus.c @@ -0,0 +1,1362 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 1999-2013 Petko Manolov (petkan@nucleusys.com) + * + * ChangeLog: + * .... Most of the time spent on reading sources & docs. + * v0.2.x First official release for the Linux kernel. + * v0.3.0 Beutified and structured, some bugs fixed. + * v0.3.x URBifying bulk requests and bugfixing. First relatively + * stable release. Still can touch device's registers only + * from top-halves. + * v0.4.0 Control messages remained unurbified are now URBs. + * Now we can touch the HW at any time. + * v0.4.9 Control urbs again use process context to wait. Argh... + * Some long standing bugs (enable_net_traffic) fixed. + * Also nasty trick about resubmiting control urb from + * interrupt context used. Please let me know how it + * behaves. Pegasus II support added since this version. + * TODO: suppressing HCD warnings spewage on disconnect. + * v0.4.13 Ethernet address is now set at probe(), not at open() + * time as this seems to break dhcpd. + * v0.5.0 branch to 2.5.x kernels + * v0.5.1 ethtool support added + * v0.5.5 rx socket buffers are in a pool and the their allocation + * is out of the interrupt routine. + * ... + * v0.9.3 simplified [get|set]_register(s), async update registers + * logic revisited, receive skb_pool removed. + */ + +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/usb.h> +#include <linux/module.h> +#include <asm/byteorder.h> +#include <linux/uaccess.h> +#include "pegasus.h" + +/* + * Version Information + */ +#define DRIVER_VERSION "v0.9.3 (2013/04/25)" +#define DRIVER_AUTHOR "Petko Manolov <petkan@nucleusys.com>" +#define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver" + +static const char driver_name[] = "pegasus"; + +#undef PEGASUS_WRITE_EEPROM +#define BMSR_MEDIA (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \ + BMSR_100FULL | BMSR_ANEGCAPABLE) +#define CARRIER_CHECK_DELAY (2 * HZ) + +static bool loopback; +static bool mii_mode; +static char *devid; + +static struct usb_eth_dev usb_dev_id[] = { +#define PEGASUS_DEV(pn, vid, pid, flags) \ + {.name = pn, .vendor = vid, .device = pid, .private = flags}, +#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \ + PEGASUS_DEV(pn, vid, pid, flags) +#include "pegasus.h" +#undef PEGASUS_DEV +#undef PEGASUS_DEV_CLASS + {NULL, 0, 0, 0}, + {NULL, 0, 0, 0} +}; + +static struct usb_device_id pegasus_ids[] = { +#define PEGASUS_DEV(pn, vid, pid, flags) \ + {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid}, +/* + * The Belkin F8T012xx1 bluetooth adaptor has the same vendor and product + * IDs as the Belkin F5D5050, so we need to teach the pegasus driver to + * ignore adaptors belonging to the "Wireless" class 0xE0. For this one + * case anyway, seeing as the pegasus is for "Wired" adaptors. + */ +#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \ + {.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \ + .idVendor = vid, .idProduct = pid, .bDeviceClass = dclass}, +#include "pegasus.h" +#undef PEGASUS_DEV +#undef PEGASUS_DEV_CLASS + {}, + {} +}; + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +module_param(loopback, bool, 0); +module_param(mii_mode, bool, 0); +module_param(devid, charp, 0); +MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)"); +MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0"); +MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'"); + +/* use ethtool to change the level for any given device */ +static int msg_level = -1; +module_param(msg_level, int, 0); +MODULE_PARM_DESC(msg_level, "Override default message level"); + +MODULE_DEVICE_TABLE(usb, pegasus_ids); +static const struct net_device_ops pegasus_netdev_ops; + +/*****/ + +static void async_ctrl_callback(struct urb *urb) +{ + struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; + int status = urb->status; + + if (status < 0) + dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status); + kfree(req); + usb_free_urb(urb); +} + +static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size, void *data) +{ + return usb_control_msg_recv(pegasus->usb, 0, PEGASUS_REQ_GET_REGS, + PEGASUS_REQT_READ, 0, indx, data, size, + 1000, GFP_NOIO); +} + +static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size, + const void *data) +{ + int ret; + + ret = usb_control_msg_send(pegasus->usb, 0, PEGASUS_REQ_SET_REGS, + PEGASUS_REQT_WRITE, 0, indx, data, size, + 1000, GFP_NOIO); + if (ret < 0) + netif_dbg(pegasus, drv, pegasus->net, "%s failed with %d\n", __func__, ret); + + return ret; +} + +/* + * There is only one way to write to a single ADM8511 register and this is via + * specific control request. 'data' is ignored by the device, but it is here to + * not break the API. + */ +static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data) +{ + void *buf = &data; + int ret; + + ret = usb_control_msg_send(pegasus->usb, 0, PEGASUS_REQ_SET_REG, + PEGASUS_REQT_WRITE, data, indx, buf, 1, + 1000, GFP_NOIO); + if (ret < 0) + netif_dbg(pegasus, drv, pegasus->net, "%s failed with %d\n", __func__, ret); + + return ret; +} + +static int update_eth_regs_async(pegasus_t *pegasus) +{ + int ret = -ENOMEM; + struct urb *async_urb; + struct usb_ctrlrequest *req; + + req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); + if (req == NULL) + return ret; + + async_urb = usb_alloc_urb(0, GFP_ATOMIC); + if (async_urb == NULL) { + kfree(req); + return ret; + } + req->bRequestType = PEGASUS_REQT_WRITE; + req->bRequest = PEGASUS_REQ_SET_REGS; + req->wValue = cpu_to_le16(0); + req->wIndex = cpu_to_le16(EthCtrl0); + req->wLength = cpu_to_le16(3); + + usb_fill_control_urb(async_urb, pegasus->usb, + usb_sndctrlpipe(pegasus->usb, 0), (void *)req, + pegasus->eth_regs, 3, async_ctrl_callback, req); + + ret = usb_submit_urb(async_urb, GFP_ATOMIC); + if (ret) { + if (ret == -ENODEV) + netif_device_detach(pegasus->net); + netif_err(pegasus, drv, pegasus->net, + "%s returned %d\n", __func__, ret); + } + return ret; +} + +static int __mii_op(pegasus_t *p, __u8 phy, __u8 indx, __u16 *regd, __u8 cmd) +{ + int i, ret; + __le16 regdi; + __u8 data[4] = { phy, 0, 0, indx }; + + if (cmd & PHY_WRITE) { + __le16 *t = (__le16 *) & data[1]; + *t = cpu_to_le16(*regd); + } + set_register(p, PhyCtrl, 0); + set_registers(p, PhyAddr, sizeof(data), data); + set_register(p, PhyCtrl, (indx | cmd)); + for (i = 0; i < REG_TIMEOUT; i++) { + ret = get_registers(p, PhyCtrl, 1, data); + if (ret < 0) + goto fail; + if (data[0] & PHY_DONE) + break; + } + if (i >= REG_TIMEOUT) { + ret = -ETIMEDOUT; + goto fail; + } + if (cmd & PHY_READ) { + ret = get_registers(p, PhyData, 2, ®di); + if (ret < 0) + goto fail; + *regd = le16_to_cpu(regdi); + } + return 0; +fail: + netif_dbg(p, drv, p->net, "%s failed\n", __func__); + return ret; +} + +/* Returns non-negative int on success, error on failure */ +static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd) +{ + return __mii_op(pegasus, phy, indx, regd, PHY_READ); +} + +/* Returns zero on success, error on failure */ +static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd) +{ + return __mii_op(pegasus, phy, indx, regd, PHY_WRITE); +} + +static int mdio_read(struct net_device *dev, int phy_id, int loc) +{ + pegasus_t *pegasus = netdev_priv(dev); + int ret; + u16 res; + + ret = read_mii_word(pegasus, phy_id, loc, &res); + if (ret < 0) + return ret; + + return (int)res; +} + +static void mdio_write(struct net_device *dev, int phy_id, int loc, int val) +{ + pegasus_t *pegasus = netdev_priv(dev); + u16 data = val; + + write_mii_word(pegasus, phy_id, loc, &data); +} + +static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata) +{ + int ret, i; + __le16 retdatai; + __u8 tmp = 0; + + set_register(pegasus, EpromCtrl, 0); + set_register(pegasus, EpromOffset, index); + set_register(pegasus, EpromCtrl, EPROM_READ); + + for (i = 0; i < REG_TIMEOUT; i++) { + ret = get_registers(pegasus, EpromCtrl, 1, &tmp); + if (ret < 0) + goto fail; + if (tmp & EPROM_DONE) + break; + } + if (i >= REG_TIMEOUT) { + ret = -ETIMEDOUT; + goto fail; + } + + ret = get_registers(pegasus, EpromData, 2, &retdatai); + if (ret < 0) + goto fail; + *retdata = le16_to_cpu(retdatai); + return ret; + +fail: + netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__); + return ret; +} + +#ifdef PEGASUS_WRITE_EEPROM +static inline void enable_eprom_write(pegasus_t *pegasus) +{ + __u8 tmp; + + get_registers(pegasus, EthCtrl2, 1, &tmp); + set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE); +} + +static inline void disable_eprom_write(pegasus_t *pegasus) +{ + __u8 tmp; + + get_registers(pegasus, EthCtrl2, 1, &tmp); + set_register(pegasus, EpromCtrl, 0); + set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE); +} + +static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data) +{ + int i; + __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE }; + int ret; + __le16 le_data = cpu_to_le16(data); + + set_registers(pegasus, EpromOffset, 4, d); + enable_eprom_write(pegasus); + set_register(pegasus, EpromOffset, index); + set_registers(pegasus, EpromData, 2, &le_data); + set_register(pegasus, EpromCtrl, EPROM_WRITE); + + for (i = 0; i < REG_TIMEOUT; i++) { + ret = get_registers(pegasus, EpromCtrl, 1, &tmp); + if (ret == -ESHUTDOWN) + goto fail; + if (tmp & EPROM_DONE) + break; + } + disable_eprom_write(pegasus); + if (i >= REG_TIMEOUT) + goto fail; + + return ret; + +fail: + netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__); + return -ETIMEDOUT; +} +#endif /* PEGASUS_WRITE_EEPROM */ + +static inline int get_node_id(pegasus_t *pegasus, u8 *id) +{ + int i, ret; + u16 w16; + + for (i = 0; i < 3; i++) { + ret = read_eprom_word(pegasus, i, &w16); + if (ret < 0) + return ret; + ((__le16 *) id)[i] = cpu_to_le16(w16); + } + + return 0; +} + +static void set_ethernet_addr(pegasus_t *pegasus) +{ + int ret; + u8 node_id[6]; + + if (pegasus->features & PEGASUS_II) { + ret = get_registers(pegasus, 0x10, sizeof(node_id), node_id); + if (ret < 0) + goto err; + } else { + ret = get_node_id(pegasus, node_id); + if (ret < 0) + goto err; + ret = set_registers(pegasus, EthID, sizeof(node_id), node_id); + if (ret < 0) + goto err; + } + + memcpy(pegasus->net->dev_addr, node_id, sizeof(node_id)); + + return; +err: + eth_hw_addr_random(pegasus->net); + netif_dbg(pegasus, drv, pegasus->net, "software assigned MAC address.\n"); + + return; +} + +static inline int reset_mac(pegasus_t *pegasus) +{ + int ret, i; + __u8 data = 0x8; + + set_register(pegasus, EthCtrl1, data); + for (i = 0; i < REG_TIMEOUT; i++) { + ret = get_registers(pegasus, EthCtrl1, 1, &data); + if (ret < 0) + goto fail; + if (~data & 0x08) { + if (loopback) + break; + if (mii_mode && (pegasus->features & HAS_HOME_PNA)) + set_register(pegasus, Gpio1, 0x34); + else + set_register(pegasus, Gpio1, 0x26); + set_register(pegasus, Gpio0, pegasus->features); + set_register(pegasus, Gpio0, DEFAULT_GPIO_SET); + break; + } + } + if (i == REG_TIMEOUT) + return -ETIMEDOUT; + + if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS || + usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) { + set_register(pegasus, Gpio0, 0x24); + set_register(pegasus, Gpio0, 0x26); + } + if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) { + __u16 auxmode; + ret = read_mii_word(pegasus, 3, 0x1b, &auxmode); + if (ret < 0) + goto fail; + auxmode |= 4; + write_mii_word(pegasus, 3, 0x1b, &auxmode); + } + + return 0; +fail: + netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__); + return ret; +} + +static int enable_net_traffic(struct net_device *dev, struct usb_device *usb) +{ + pegasus_t *pegasus = netdev_priv(dev); + int ret; + __u16 linkpart; + __u8 data[4]; + + ret = read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart); + if (ret < 0) + goto fail; + data[0] = 0xc8; /* TX & RX enable, append status, no CRC */ + data[1] = 0; + if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL)) + data[1] |= 0x20; /* set full duplex */ + if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF)) + data[1] |= 0x10; /* set 100 Mbps */ + if (mii_mode) + data[1] = 0; + data[2] = loopback ? 0x09 : 0x01; + + memcpy(pegasus->eth_regs, data, sizeof(data)); + ret = set_registers(pegasus, EthCtrl0, 3, data); + + if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS || + usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 || + usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) { + u16 auxmode; + ret = read_mii_word(pegasus, 0, 0x1b, &auxmode); + if (ret < 0) + goto fail; + auxmode |= 4; + write_mii_word(pegasus, 0, 0x1b, &auxmode); + } + + return ret; +fail: + netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__); + return ret; +} + +static void read_bulk_callback(struct urb *urb) +{ + pegasus_t *pegasus = urb->context; + struct net_device *net; + u8 *buf = urb->transfer_buffer; + int rx_status, count = urb->actual_length; + int status = urb->status; + __u16 pkt_len; + + if (!pegasus) + return; + + net = pegasus->net; + if (!netif_device_present(net) || !netif_running(net)) + return; + + switch (status) { + case 0: + break; + case -ETIME: + netif_dbg(pegasus, rx_err, net, "reset MAC\n"); + pegasus->flags &= ~PEGASUS_RX_BUSY; + break; + case -EPIPE: /* stall, or disconnect from TT */ + /* FIXME schedule work to clear the halt */ + netif_warn(pegasus, rx_err, net, "no rx stall recovery\n"); + return; + case -ENOENT: + case -ECONNRESET: + case -ESHUTDOWN: + netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status); + return; + default: + netif_dbg(pegasus, rx_err, net, "RX status %d\n", status); + goto goon; + } + + if (count < 4) + goto goon; + + rx_status = buf[count - 2]; + if (rx_status & 0x1c) { + netif_dbg(pegasus, rx_err, net, + "RX packet error %x\n", rx_status); + net->stats.rx_errors++; + if (rx_status & 0x04) /* runt */ + net->stats.rx_length_errors++; + if (rx_status & 0x08) + net->stats.rx_crc_errors++; + if (rx_status & 0x10) /* extra bits */ + net->stats.rx_frame_errors++; + goto goon; + } + if (pegasus->chip == 0x8513) { + pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer); + pkt_len &= 0x0fff; + pegasus->rx_skb->data += 2; + } else { + pkt_len = buf[count - 3] << 8; + pkt_len += buf[count - 4]; + pkt_len &= 0xfff; + pkt_len -= 4; + } + + /* + * If the packet is unreasonably long, quietly drop it rather than + * kernel panicing by calling skb_put. + */ + if (pkt_len > PEGASUS_MTU) + goto goon; + + /* + * at this point we are sure pegasus->rx_skb != NULL + * so we go ahead and pass up the packet. + */ + skb_put(pegasus->rx_skb, pkt_len); + pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net); + netif_rx(pegasus->rx_skb); + net->stats.rx_packets++; + net->stats.rx_bytes += pkt_len; + + if (pegasus->flags & PEGASUS_UNPLUG) + return; + + pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU, + GFP_ATOMIC); + + if (pegasus->rx_skb == NULL) + goto tl_sched; +goon: + usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb, + usb_rcvbulkpipe(pegasus->usb, 1), + pegasus->rx_skb->data, PEGASUS_MTU, + read_bulk_callback, pegasus); + rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC); + if (rx_status == -ENODEV) + netif_device_detach(pegasus->net); + else if (rx_status) { + pegasus->flags |= PEGASUS_RX_URB_FAIL; + goto tl_sched; + } else { + pegasus->flags &= ~PEGASUS_RX_URB_FAIL; + } + + return; + +tl_sched: + tasklet_schedule(&pegasus->rx_tl); +} + +static void rx_fixup(unsigned long data) +{ + pegasus_t *pegasus; + int status; + + pegasus = (pegasus_t *) data; + if (pegasus->flags & PEGASUS_UNPLUG) + return; + + if (pegasus->flags & PEGASUS_RX_URB_FAIL) + if (pegasus->rx_skb) + goto try_again; + if (pegasus->rx_skb == NULL) + pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, + PEGASUS_MTU, + GFP_ATOMIC); + if (pegasus->rx_skb == NULL) { + netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n"); + tasklet_schedule(&pegasus->rx_tl); + return; + } + usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb, + usb_rcvbulkpipe(pegasus->usb, 1), + pegasus->rx_skb->data, PEGASUS_MTU, + read_bulk_callback, pegasus); +try_again: + status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC); + if (status == -ENODEV) + netif_device_detach(pegasus->net); + else if (status) { + pegasus->flags |= PEGASUS_RX_URB_FAIL; + tasklet_schedule(&pegasus->rx_tl); + } else { + pegasus->flags &= ~PEGASUS_RX_URB_FAIL; + } +} + +static void write_bulk_callback(struct urb *urb) +{ + pegasus_t *pegasus = urb->context; + struct net_device *net; + int status = urb->status; + + if (!pegasus) + return; + + net = pegasus->net; + + if (!netif_device_present(net) || !netif_running(net)) + return; + + switch (status) { + case -EPIPE: + /* FIXME schedule_work() to clear the tx halt */ + netif_stop_queue(net); + netif_warn(pegasus, tx_err, net, "no tx stall recovery\n"); + return; + case -ENOENT: + case -ECONNRESET: + case -ESHUTDOWN: + netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status); + return; + default: + netif_info(pegasus, tx_err, net, "TX status %d\n", status); + fallthrough; + case 0: + break; + } + + netif_trans_update(net); /* prevent tx timeout */ + netif_wake_queue(net); +} + +static void intr_callback(struct urb *urb) +{ + pegasus_t *pegasus = urb->context; + struct net_device *net; + int res, status = urb->status; + + if (!pegasus) + return; + net = pegasus->net; + + switch (status) { + case 0: + break; + case -ECONNRESET: /* unlink */ + case -ENOENT: + case -ESHUTDOWN: + return; + default: + /* some Pegasus-I products report LOTS of data + * toggle errors... avoid log spamming + */ + netif_dbg(pegasus, timer, net, "intr status %d\n", status); + } + + if (urb->actual_length >= 6) { + u8 *d = urb->transfer_buffer; + + /* byte 0 == tx_status1, reg 2B */ + if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL + |LATE_COL|JABBER_TIMEOUT)) { + net->stats.tx_errors++; + if (d[0] & TX_UNDERRUN) + net->stats.tx_fifo_errors++; + if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT)) + net->stats.tx_aborted_errors++; + if (d[0] & LATE_COL) + net->stats.tx_window_errors++; + } + + /* d[5].LINK_STATUS lies on some adapters. + * d[0].NO_CARRIER kicks in only with failed TX. + * ... so monitoring with MII may be safest. + */ + + /* bytes 3-4 == rx_lostpkt, reg 2E/2F */ + net->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4]; + } + + res = usb_submit_urb(urb, GFP_ATOMIC); + if (res == -ENODEV) + netif_device_detach(pegasus->net); + if (res) + netif_err(pegasus, timer, net, + "can't resubmit interrupt urb, %d\n", res); +} + +static void pegasus_tx_timeout(struct net_device *net, unsigned int txqueue) +{ + pegasus_t *pegasus = netdev_priv(net); + netif_warn(pegasus, timer, net, "tx timeout\n"); + usb_unlink_urb(pegasus->tx_urb); + net->stats.tx_errors++; +} + +static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb, + struct net_device *net) +{ + pegasus_t *pegasus = netdev_priv(net); + int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3; + int res; + __u16 l16 = skb->len; + + netif_stop_queue(net); + + ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16); + skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len); + usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb, + usb_sndbulkpipe(pegasus->usb, 2), + pegasus->tx_buff, count, + write_bulk_callback, pegasus); + if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) { + netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res); + switch (res) { + case -EPIPE: /* stall, or disconnect from TT */ + /* cleanup should already have been scheduled */ + break; + case -ENODEV: /* disconnect() upcoming */ + case -EPERM: + netif_device_detach(pegasus->net); + break; + default: + net->stats.tx_errors++; + netif_start_queue(net); + } + } else { + net->stats.tx_packets++; + net->stats.tx_bytes += skb->len; + } + dev_kfree_skb(skb); + + return NETDEV_TX_OK; +} + +static inline void disable_net_traffic(pegasus_t *pegasus) +{ + __le16 tmp = cpu_to_le16(0); + + set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp); +} + +static inline int get_interrupt_interval(pegasus_t *pegasus) +{ + u16 data; + u8 interval; + int ret; + + ret = read_eprom_word(pegasus, 4, &data); + if (ret < 0) + return ret; + + interval = data >> 8; + if (pegasus->usb->speed != USB_SPEED_HIGH) { + if (interval < 0x80) { + netif_info(pegasus, timer, pegasus->net, + "intr interval changed from %ums to %ums\n", + interval, 0x80); + interval = 0x80; + data = (data & 0x00FF) | ((u16)interval << 8); +#ifdef PEGASUS_WRITE_EEPROM + write_eprom_word(pegasus, 4, data); +#endif + } + } + pegasus->intr_interval = interval; + + return 0; +} + +static void set_carrier(struct net_device *net) +{ + pegasus_t *pegasus = netdev_priv(net); + u16 tmp; + + if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp)) + return; + + if (tmp & BMSR_LSTATUS) + netif_carrier_on(net); + else + netif_carrier_off(net); +} + +static void free_all_urbs(pegasus_t *pegasus) +{ + usb_free_urb(pegasus->intr_urb); + usb_free_urb(pegasus->tx_urb); + usb_free_urb(pegasus->rx_urb); +} + +static void unlink_all_urbs(pegasus_t *pegasus) +{ + usb_kill_urb(pegasus->intr_urb); + usb_kill_urb(pegasus->tx_urb); + usb_kill_urb(pegasus->rx_urb); +} + +static int alloc_urbs(pegasus_t *pegasus) +{ + int res = -ENOMEM; + + pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!pegasus->rx_urb) { + return res; + } + pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!pegasus->tx_urb) { + usb_free_urb(pegasus->rx_urb); + return res; + } + pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!pegasus->intr_urb) { + usb_free_urb(pegasus->tx_urb); + usb_free_urb(pegasus->rx_urb); + return res; + } + + return 0; +} + +static int pegasus_open(struct net_device *net) +{ + pegasus_t *pegasus = netdev_priv(net); + int res=-ENOMEM; + + if (pegasus->rx_skb == NULL) + pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, + PEGASUS_MTU, + GFP_KERNEL); + if (!pegasus->rx_skb) + goto exit; + + set_registers(pegasus, EthID, 6, net->dev_addr); + + usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb, + usb_rcvbulkpipe(pegasus->usb, 1), + pegasus->rx_skb->data, PEGASUS_MTU, + read_bulk_callback, pegasus); + if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) { + if (res == -ENODEV) + netif_device_detach(pegasus->net); + netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res); + goto exit; + } + + usb_fill_int_urb(pegasus->intr_urb, pegasus->usb, + usb_rcvintpipe(pegasus->usb, 3), + pegasus->intr_buff, sizeof(pegasus->intr_buff), + intr_callback, pegasus, pegasus->intr_interval); + if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) { + if (res == -ENODEV) + netif_device_detach(pegasus->net); + netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res); + usb_kill_urb(pegasus->rx_urb); + goto exit; + } + res = enable_net_traffic(net, pegasus->usb); + if (res < 0) { + netif_dbg(pegasus, ifup, net, + "can't enable_net_traffic() - %d\n", res); + res = -EIO; + usb_kill_urb(pegasus->rx_urb); + usb_kill_urb(pegasus->intr_urb); + goto exit; + } + set_carrier(net); + netif_start_queue(net); + netif_dbg(pegasus, ifup, net, "open\n"); + res = 0; +exit: + return res; +} + +static int pegasus_close(struct net_device *net) +{ + pegasus_t *pegasus = netdev_priv(net); + + netif_stop_queue(net); + if (!(pegasus->flags & PEGASUS_UNPLUG)) + disable_net_traffic(pegasus); + tasklet_kill(&pegasus->rx_tl); + unlink_all_urbs(pegasus); + + return 0; +} + +static void pegasus_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + pegasus_t *pegasus = netdev_priv(dev); + + strlcpy(info->driver, driver_name, sizeof(info->driver)); + strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); + usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info)); +} + +/* also handles three patterns of some kind in hardware */ +#define WOL_SUPPORTED (WAKE_MAGIC|WAKE_PHY) + +static void +pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) +{ + pegasus_t *pegasus = netdev_priv(dev); + + wol->supported = WAKE_MAGIC | WAKE_PHY; + wol->wolopts = pegasus->wolopts; +} + +static int +pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) +{ + pegasus_t *pegasus = netdev_priv(dev); + u8 reg78 = 0x04; + int ret; + + if (wol->wolopts & ~WOL_SUPPORTED) + return -EINVAL; + + if (wol->wolopts & WAKE_MAGIC) + reg78 |= 0x80; + if (wol->wolopts & WAKE_PHY) + reg78 |= 0x40; + /* FIXME this 0x10 bit still needs to get set in the chip... */ + if (wol->wolopts) + pegasus->eth_regs[0] |= 0x10; + else + pegasus->eth_regs[0] &= ~0x10; + pegasus->wolopts = wol->wolopts; + + ret = set_register(pegasus, WakeupControl, reg78); + if (!ret) + ret = device_set_wakeup_enable(&pegasus->usb->dev, + wol->wolopts); + return ret; +} + +static inline void pegasus_reset_wol(struct net_device *dev) +{ + struct ethtool_wolinfo wol; + + memset(&wol, 0, sizeof wol); + (void) pegasus_set_wol(dev, &wol); +} + +static int +pegasus_get_link_ksettings(struct net_device *dev, + struct ethtool_link_ksettings *ecmd) +{ + pegasus_t *pegasus; + + pegasus = netdev_priv(dev); + mii_ethtool_get_link_ksettings(&pegasus->mii, ecmd); + return 0; +} + +static int +pegasus_set_link_ksettings(struct net_device *dev, + const struct ethtool_link_ksettings *ecmd) +{ + pegasus_t *pegasus = netdev_priv(dev); + return mii_ethtool_set_link_ksettings(&pegasus->mii, ecmd); +} + +static int pegasus_nway_reset(struct net_device *dev) +{ + pegasus_t *pegasus = netdev_priv(dev); + return mii_nway_restart(&pegasus->mii); +} + +static u32 pegasus_get_link(struct net_device *dev) +{ + pegasus_t *pegasus = netdev_priv(dev); + return mii_link_ok(&pegasus->mii); +} + +static u32 pegasus_get_msglevel(struct net_device *dev) +{ + pegasus_t *pegasus = netdev_priv(dev); + return pegasus->msg_enable; +} + +static void pegasus_set_msglevel(struct net_device *dev, u32 v) +{ + pegasus_t *pegasus = netdev_priv(dev); + pegasus->msg_enable = v; +} + +static const struct ethtool_ops ops = { + .get_drvinfo = pegasus_get_drvinfo, + .nway_reset = pegasus_nway_reset, + .get_link = pegasus_get_link, + .get_msglevel = pegasus_get_msglevel, + .set_msglevel = pegasus_set_msglevel, + .get_wol = pegasus_get_wol, + .set_wol = pegasus_set_wol, + .get_link_ksettings = pegasus_get_link_ksettings, + .set_link_ksettings = pegasus_set_link_ksettings, +}; + +static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd) +{ + __u16 *data = (__u16 *) &rq->ifr_ifru; + pegasus_t *pegasus = netdev_priv(net); + int res; + + switch (cmd) { + case SIOCDEVPRIVATE: + data[0] = pegasus->phy; + fallthrough; + case SIOCDEVPRIVATE + 1: + res = read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]); + break; + case SIOCDEVPRIVATE + 2: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, &data[2]); + res = 0; + break; + default: + res = -EOPNOTSUPP; + } + return res; +} + +static void pegasus_set_multicast(struct net_device *net) +{ + pegasus_t *pegasus = netdev_priv(net); + + if (net->flags & IFF_PROMISC) { + pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS; + netif_info(pegasus, link, net, "Promiscuous mode enabled\n"); + } else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) { + pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST; + pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS; + netif_dbg(pegasus, link, net, "set allmulti\n"); + } else { + pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST; + pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS; + } + update_eth_regs_async(pegasus); +} + +static __u8 mii_phy_probe(pegasus_t *pegasus) +{ + int i, ret; + __u16 tmp; + + for (i = 0; i < 32; i++) { + ret = read_mii_word(pegasus, i, MII_BMSR, &tmp); + if (ret < 0) + goto fail; + if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0) + continue; + else + return i; + } +fail: + return 0xff; +} + +static inline void setup_pegasus_II(pegasus_t *pegasus) +{ + int ret; + __u8 data = 0xa5; + + set_register(pegasus, Reg1d, 0); + set_register(pegasus, Reg7b, 1); + msleep(100); + if ((pegasus->features & HAS_HOME_PNA) && mii_mode) + set_register(pegasus, Reg7b, 0); + else + set_register(pegasus, Reg7b, 2); + + set_register(pegasus, 0x83, data); + ret = get_registers(pegasus, 0x83, 1, &data); + if (ret < 0) + goto fail; + + if (data == 0xa5) + pegasus->chip = 0x8513; + else + pegasus->chip = 0; + + set_register(pegasus, 0x80, 0xc0); + set_register(pegasus, 0x83, 0xff); + set_register(pegasus, 0x84, 0x01); + + if (pegasus->features & HAS_HOME_PNA && mii_mode) + set_register(pegasus, Reg81, 6); + else + set_register(pegasus, Reg81, 2); + + return; +fail: + netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__); +} + +static void check_carrier(struct work_struct *work) +{ + pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work); + set_carrier(pegasus->net); + if (!(pegasus->flags & PEGASUS_UNPLUG)) { + queue_delayed_work(system_long_wq, &pegasus->carrier_check, + CARRIER_CHECK_DELAY); + } +} + +static int pegasus_blacklisted(struct usb_device *udev) +{ + struct usb_device_descriptor *udd = &udev->descriptor; + + /* Special quirk to keep the driver from handling the Belkin Bluetooth + * dongle which happens to have the same ID. + */ + if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) && + (udd->idProduct == cpu_to_le16(0x0121)) && + (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) && + (udd->bDeviceProtocol == 1)) + return 1; + + return 0; +} + +static int pegasus_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev(intf); + struct net_device *net; + pegasus_t *pegasus; + int dev_index = id - pegasus_ids; + int res = -ENOMEM; + + if (pegasus_blacklisted(dev)) + return -ENODEV; + + net = alloc_etherdev(sizeof(struct pegasus)); + if (!net) + goto out; + + pegasus = netdev_priv(net); + pegasus->dev_index = dev_index; + + res = alloc_urbs(pegasus); + if (res < 0) { + dev_err(&intf->dev, "can't allocate %s\n", "urbs"); + goto out1; + } + + tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus); + + INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier); + + pegasus->intf = intf; + pegasus->usb = dev; + pegasus->net = net; + + + net->watchdog_timeo = PEGASUS_TX_TIMEOUT; + net->netdev_ops = &pegasus_netdev_ops; + net->ethtool_ops = &ops; + pegasus->mii.dev = net; + pegasus->mii.mdio_read = mdio_read; + pegasus->mii.mdio_write = mdio_write; + pegasus->mii.phy_id_mask = 0x1f; + pegasus->mii.reg_num_mask = 0x1f; + pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV + | NETIF_MSG_PROBE | NETIF_MSG_LINK); + + pegasus->features = usb_dev_id[dev_index].private; + res = get_interrupt_interval(pegasus); + if (res) + goto out2; + if (reset_mac(pegasus)) { + dev_err(&intf->dev, "can't reset MAC\n"); + res = -EIO; + goto out2; + } + set_ethernet_addr(pegasus); + if (pegasus->features & PEGASUS_II) { + dev_info(&intf->dev, "setup Pegasus II specific registers\n"); + setup_pegasus_II(pegasus); + } + pegasus->phy = mii_phy_probe(pegasus); + if (pegasus->phy == 0xff) { + dev_warn(&intf->dev, "can't locate MII phy, using default\n"); + pegasus->phy = 1; + } + pegasus->mii.phy_id = pegasus->phy; + usb_set_intfdata(intf, pegasus); + SET_NETDEV_DEV(net, &intf->dev); + pegasus_reset_wol(net); + res = register_netdev(net); + if (res) + goto out3; + queue_delayed_work(system_long_wq, &pegasus->carrier_check, + CARRIER_CHECK_DELAY); + dev_info(&intf->dev, "%s, %s, %pM\n", net->name, + usb_dev_id[dev_index].name, net->dev_addr); + return 0; + +out3: + usb_set_intfdata(intf, NULL); +out2: + free_all_urbs(pegasus); +out1: + free_netdev(net); +out: + return res; +} + +static void pegasus_disconnect(struct usb_interface *intf) +{ + struct pegasus *pegasus = usb_get_intfdata(intf); + + usb_set_intfdata(intf, NULL); + if (!pegasus) { + dev_dbg(&intf->dev, "unregistering non-bound device?\n"); + return; + } + + pegasus->flags |= PEGASUS_UNPLUG; + cancel_delayed_work_sync(&pegasus->carrier_check); + unregister_netdev(pegasus->net); + unlink_all_urbs(pegasus); + free_all_urbs(pegasus); + if (pegasus->rx_skb != NULL) { + dev_kfree_skb(pegasus->rx_skb); + pegasus->rx_skb = NULL; + } + free_netdev(pegasus->net); +} + +static int pegasus_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct pegasus *pegasus = usb_get_intfdata(intf); + + netif_device_detach(pegasus->net); + cancel_delayed_work_sync(&pegasus->carrier_check); + if (netif_running(pegasus->net)) { + usb_kill_urb(pegasus->rx_urb); + usb_kill_urb(pegasus->intr_urb); + } + return 0; +} + +static int pegasus_resume(struct usb_interface *intf) +{ + struct pegasus *pegasus = usb_get_intfdata(intf); + + netif_device_attach(pegasus->net); + if (netif_running(pegasus->net)) { + pegasus->rx_urb->status = 0; + pegasus->rx_urb->actual_length = 0; + read_bulk_callback(pegasus->rx_urb); + + pegasus->intr_urb->status = 0; + pegasus->intr_urb->actual_length = 0; + intr_callback(pegasus->intr_urb); + } + queue_delayed_work(system_long_wq, &pegasus->carrier_check, + CARRIER_CHECK_DELAY); + return 0; +} + +static const struct net_device_ops pegasus_netdev_ops = { + .ndo_open = pegasus_open, + .ndo_stop = pegasus_close, + .ndo_do_ioctl = pegasus_ioctl, + .ndo_start_xmit = pegasus_start_xmit, + .ndo_set_rx_mode = pegasus_set_multicast, + .ndo_tx_timeout = pegasus_tx_timeout, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static struct usb_driver pegasus_driver = { + .name = driver_name, + .probe = pegasus_probe, + .disconnect = pegasus_disconnect, + .id_table = pegasus_ids, + .suspend = pegasus_suspend, + .resume = pegasus_resume, + .disable_hub_initiated_lpm = 1, +}; + +static void __init parse_id(char *id) +{ + unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0; + char *token, *name = NULL; + + if ((token = strsep(&id, ":")) != NULL) + name = token; + /* name now points to a null terminated string*/ + if ((token = strsep(&id, ":")) != NULL) + vendor_id = simple_strtoul(token, NULL, 16); + if ((token = strsep(&id, ":")) != NULL) + device_id = simple_strtoul(token, NULL, 16); + flags = simple_strtoul(id, NULL, 16); + pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n", + driver_name, name, vendor_id, device_id, flags); + + if (vendor_id > 0x10000 || vendor_id == 0) + return; + if (device_id > 0x10000 || device_id == 0) + return; + + for (i = 0; usb_dev_id[i].name; i++); + usb_dev_id[i].name = name; + usb_dev_id[i].vendor = vendor_id; + usb_dev_id[i].device = device_id; + usb_dev_id[i].private = flags; + pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE; + pegasus_ids[i].idVendor = vendor_id; + pegasus_ids[i].idProduct = device_id; +} + +static int __init pegasus_init(void) +{ + pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION); + if (devid) + parse_id(devid); + return usb_register(&pegasus_driver); +} + +static void __exit pegasus_exit(void) +{ + usb_deregister(&pegasus_driver); +} + +module_init(pegasus_init); +module_exit(pegasus_exit); 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