/*
- * MosChips MCS7830 based USB 2.0 Ethernet Devices
+ * MOSCHIP MCS7830 based USB 2.0 Ethernet Devices
*
* based on usbnet.c, asix.c and the vendor provided mcs7830 driver
*
+ * Copyright (C) 2010 Andreas Mohr <andi@lisas.de>
* Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>
* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
* Copyright (c) 2002-2003 TiVo Inc.
*
+ * Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!).
+ *
+ * TODO:
+ * - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?)
+ * - implement ethtool_ops get_pauseparam/set_pauseparam
+ * via HIF_REG_PAUSE_THRESHOLD (>= revision C only!)
+ * - implement get_eeprom/[set_eeprom]
+ * - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII)
+ * - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs,
+ * can access only ~ 24, remaining user buffer is uninitialized garbage
+ * - anything else?
+ *
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
ADVERTISE_100HALF | ADVERTISE_10FULL | \
ADVERTISE_10HALF | ADVERTISE_CSMA)
-/* HIF_REG_XX coressponding index value */
+/* HIF_REG_XX corresponding index value */
enum {
HIF_REG_MULTICAST_HASH = 0x00,
HIF_REG_PACKET_GAP1 = 0x08,
HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80,
HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40,
HIF_REG_CONFIG = 0x0e,
+ /* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */
HIF_REG_CONFIG_CFG = 0x80,
HIF_REG_CONFIG_SPEED100 = 0x40,
HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20,
HIF_REG_CONFIG_TXENABLE = 0x08,
HIF_REG_CONFIG_SLEEPMODE = 0x04,
HIF_REG_CONFIG_ALLMULTICAST = 0x02,
- HIF_REG_CONFIG_PROMISCIOUS = 0x01,
+ HIF_REG_CONFIG_PROMISCUOUS = 0x01,
HIF_REG_ETHERNET_ADDR = 0x0f,
- HIF_REG_22 = 0x15,
+ HIF_REG_FRAME_DROP_COUNTER = 0x15, /* 0..ff; reset: 0 */
HIF_REG_PAUSE_THRESHOLD = 0x16,
HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0,
};
+/* Trailing status byte in Ethernet Rx frame */
+enum {
+ MCS7830_RX_SHORT_FRAME = 0x01, /* < 64 bytes */
+ MCS7830_RX_LENGTH_ERROR = 0x02, /* framelen != Ethernet length field */
+ MCS7830_RX_ALIGNMENT_ERROR = 0x04, /* non-even number of nibbles */
+ MCS7830_RX_CRC_ERROR = 0x08,
+ MCS7830_RX_LARGE_FRAME = 0x10, /* > 1518 bytes */
+ MCS7830_RX_FRAME_CORRECT = 0x20, /* frame is correct */
+ /* [7:6] reserved */
+};
+
struct mcs7830_data {
u8 multi_filter[8];
u8 config;
return ret;
}
-static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, void *data)
+static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data)
{
struct usb_device *xdev = dev->udev;
int ret;
usb_free_urb(urb);
}
-static int mcs7830_get_address(struct usbnet *dev)
+static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr)
+{
+ int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr)
+{
+ int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
+
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
{
int ret;
- ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
- dev->net->dev_addr);
+ struct usbnet *dev = netdev_priv(netdev);
+ struct sockaddr *addr = p;
+
+ if (netif_running(netdev))
+ return -EBUSY;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EINVAL;
+
+ ret = mcs7830_hif_set_mac_address(dev, addr->sa_data);
+
if (ret < 0)
return ret;
+
+ /* it worked --> adopt it on netdev side */
+ memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+
return 0;
}
{
u8 dummy[2];
int ret;
- ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
+ ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy);
if (ret > 0)
return 2; /* Rev C or later */
return 1; /* earlier revision */
}
}
-static int mcs7830_init_dev(struct usbnet *dev)
-{
- int ret;
- int retry;
-
- /* Read MAC address from EEPROM */
- ret = -EINVAL;
- for (retry = 0; retry < 5 && ret; retry++)
- ret = mcs7830_get_address(dev);
- if (ret) {
- dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
- goto out;
- }
-
- /* Set up PHY */
- ret = mcs7830_set_autoneg(dev, 0);
- if (ret) {
- dev_info(&dev->udev->dev, "Cannot set autoneg\n");
- goto out;
- }
-
- mcs7830_rev_C_fixup(dev);
- ret = 0;
-out:
- return ret;
-}
-
static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
int location)
{
return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
}
-/* credits go to asix_set_multicast */
-static void mcs7830_set_multicast(struct net_device *net)
+static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev)
+{
+ return (struct mcs7830_data *)&dev->data;
+}
+
+static void mcs7830_hif_update_multicast_hash(struct usbnet *dev)
+{
+ struct mcs7830_data *data = mcs7830_get_data(dev);
+ mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
+ sizeof data->multi_filter,
+ data->multi_filter);
+}
+
+static void mcs7830_hif_update_config(struct usbnet *dev)
+{
+ /* implementation specific to data->config
+ (argument needs to be heap-based anyway - USB DMA!) */
+ struct mcs7830_data *data = mcs7830_get_data(dev);
+ mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
+}
+
+static void mcs7830_data_set_multicast(struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
- struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
+ struct mcs7830_data *data = mcs7830_get_data(dev);
+
+ memset(data->multi_filter, 0, sizeof data->multi_filter);
data->config = HIF_REG_CONFIG_TXENABLE;
data->config |= HIF_REG_CONFIG_ALLMULTICAST;
if (net->flags & IFF_PROMISC) {
- data->config |= HIF_REG_CONFIG_PROMISCIOUS;
+ data->config |= HIF_REG_CONFIG_PROMISCUOUS;
} else if (net->flags & IFF_ALLMULTI ||
- net->mc_count > MCS7830_MAX_MCAST) {
+ netdev_mc_count(net) > MCS7830_MAX_MCAST) {
data->config |= HIF_REG_CONFIG_ALLMULTICAST;
- } else if (net->mc_count == 0) {
+ } else if (netdev_mc_empty(net)) {
/* just broadcast and directed */
} else {
/* We use the 20 byte dev->data
* for our 8 byte filter buffer
* to avoid allocating memory that
* is tricky to free later */
- struct dev_mc_list *mc_list = net->mc_list;
+ struct dev_mc_list *mc_list;
u32 crc_bits;
- int i;
-
- memset(data->multi_filter, 0, sizeof data->multi_filter);
/* Build the multicast hash filter. */
- for (i = 0; i < net->mc_count; i++) {
+ netdev_for_each_mc_addr(mc_list, net) {
crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
- mc_list = mc_list->next;
}
+ }
+}
- mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
- sizeof data->multi_filter,
- data->multi_filter);
+static int mcs7830_apply_base_config(struct usbnet *dev)
+{
+ int ret;
+
+ /* re-configure known MAC (suspend case etc.) */
+ ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr);
+ if (ret) {
+ dev_info(&dev->udev->dev, "Cannot set MAC address\n");
+ goto out;
}
- mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
+ /* Set up PHY */
+ ret = mcs7830_set_autoneg(dev, 0);
+ if (ret) {
+ dev_info(&dev->udev->dev, "Cannot set autoneg\n");
+ goto out;
+ }
+
+ mcs7830_hif_update_multicast_hash(dev);
+ mcs7830_hif_update_config(dev);
+
+ mcs7830_rev_C_fixup(dev);
+ ret = 0;
+out:
+ return ret;
+}
+
+/* credits go to asix_set_multicast */
+static void mcs7830_set_multicast(struct net_device *net)
+{
+ struct usbnet *dev = netdev_priv(net);
+
+ mcs7830_data_set_multicast(net);
+
+ mcs7830_hif_update_multicast_hash(dev);
+ mcs7830_hif_update_config(dev);
}
static int mcs7830_get_regs_len(struct net_device *net)
.nway_reset = usbnet_nway_reset,
};
-static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
-{
- int ret;
- struct usbnet *dev = netdev_priv(netdev);
- struct sockaddr *addr = p;
-
- if (netif_running(netdev))
- return -EBUSY;
-
- if (!is_valid_ether_addr(addr->sa_data))
- return -EINVAL;
-
- memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
-
- ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
- netdev->dev_addr);
-
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
static const struct net_device_ops mcs7830_netdev_ops = {
.ndo_open = usbnet_open,
.ndo_stop = usbnet_stop,
.ndo_validate_addr = eth_validate_addr,
.ndo_do_ioctl = mcs7830_ioctl,
.ndo_set_multicast_list = mcs7830_set_multicast,
- .ndo_set_mac_address = mcs7830_set_mac_address,
+ .ndo_set_mac_address = mcs7830_set_mac_address,
};
static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
{
struct net_device *net = dev->net;
int ret;
+ int retry;
- ret = mcs7830_init_dev(dev);
+ /* Initial startup: Gather MAC address setting from EEPROM */
+ ret = -EINVAL;
+ for (retry = 0; retry < 5 && ret; retry++)
+ ret = mcs7830_hif_get_mac_address(dev, net->dev_addr);
+ if (ret) {
+ dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
+ goto out;
+ }
+
+ mcs7830_data_set_multicast(net);
+
+ ret = mcs7830_apply_base_config(dev);
if (ret)
goto out;
net->ethtool_ops = &mcs7830_ethtool_ops;
net->netdev_ops = &mcs7830_netdev_ops;
- mcs7830_set_multicast(net);
/* reserve space for the status byte on rx */
dev->rx_urb_size = ETH_FRAME_LEN + 1;
return ret;
}
-/* The chip always appends a status bytes that we need to strip */
+/* The chip always appends a status byte that we need to strip */
static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
u8 status;
skb_trim(skb, skb->len - 1);
status = skb->data[skb->len];
- if (status != 0x20)
+ if (status != MCS7830_RX_FRAME_CORRECT) {
dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
+ /* hmm, perhaps usbnet.c already sees a globally visible
+ frame error and increments rx_errors on its own already? */
+ dev->net->stats.rx_errors++;
+
+ if (status & (MCS7830_RX_SHORT_FRAME
+ |MCS7830_RX_LENGTH_ERROR
+ |MCS7830_RX_LARGE_FRAME))
+ dev->net->stats.rx_length_errors++;
+ if (status & MCS7830_RX_ALIGNMENT_ERROR)
+ dev->net->stats.rx_frame_errors++;
+ if (status & MCS7830_RX_CRC_ERROR)
+ dev->net->stats.rx_crc_errors++;
+ }
+
return skb->len > 0;
}
};
MODULE_DEVICE_TABLE(usb, products);
+static int mcs7830_reset_resume (struct usb_interface *intf)
+{
+ /* YES, this function is successful enough that ethtool -d
+ does show same output pre-/post-suspend */
+
+ struct usbnet *dev = usb_get_intfdata(intf);
+
+ mcs7830_apply_base_config(dev);
+
+ usbnet_resume(intf);
+
+ return 0;
+}
+
static struct usb_driver mcs7830_driver = {
.name = driver_name,
.id_table = products,
.disconnect = usbnet_disconnect,
.suspend = usbnet_suspend,
.resume = usbnet_resume,
+ .reset_resume = mcs7830_reset_resume,
};
static int __init mcs7830_init(void)
projects / linux-2.6-block.git / blobdiff