From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/net/usb/sr9700.c | 558 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 558 insertions(+) create mode 100644 drivers/net/usb/sr9700.c (limited to 'drivers/net/usb/sr9700.c') diff --git a/drivers/net/usb/sr9700.c b/drivers/net/usb/sr9700.c new file mode 100644 index 0000000000..3164451e10 --- /dev/null +++ b/drivers/net/usb/sr9700.c @@ -0,0 +1,558 @@ +/* + * CoreChip-sz SR9700 one chip USB 1.1 Ethernet Devices + * + * Author : Liu Junliang + * + * Based on dm9601.c + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sr9700.h" + +static int sr_read(struct usbnet *dev, u8 reg, u16 length, void *data) +{ + int err; + + err = usbnet_read_cmd(dev, SR_RD_REGS, SR_REQ_RD_REG, 0, reg, data, + length); + if ((err != length) && (err >= 0)) + err = -EINVAL; + return err; +} + +static int sr_write(struct usbnet *dev, u8 reg, u16 length, void *data) +{ + int err; + + err = usbnet_write_cmd(dev, SR_WR_REGS, SR_REQ_WR_REG, 0, reg, data, + length); + if ((err >= 0) && (err < length)) + err = -EINVAL; + return err; +} + +static int sr_read_reg(struct usbnet *dev, u8 reg, u8 *value) +{ + return sr_read(dev, reg, 1, value); +} + +static int sr_write_reg(struct usbnet *dev, u8 reg, u8 value) +{ + return usbnet_write_cmd(dev, SR_WR_REGS, SR_REQ_WR_REG, + value, reg, NULL, 0); +} + +static void sr_write_async(struct usbnet *dev, u8 reg, u16 length, + const void *data) +{ + usbnet_write_cmd_async(dev, SR_WR_REGS, SR_REQ_WR_REG, + 0, reg, data, length); +} + +static void sr_write_reg_async(struct usbnet *dev, u8 reg, u8 value) +{ + usbnet_write_cmd_async(dev, SR_WR_REGS, SR_REQ_WR_REG, + value, reg, NULL, 0); +} + +static int wait_phy_eeprom_ready(struct usbnet *dev, int phy) +{ + int i; + + for (i = 0; i < SR_SHARE_TIMEOUT; i++) { + u8 tmp = 0; + int ret; + + udelay(1); + ret = sr_read_reg(dev, SR_EPCR, &tmp); + if (ret < 0) + return ret; + + /* ready */ + if (!(tmp & EPCR_ERRE)) + return 0; + } + + netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom"); + + return -EIO; +} + +static int sr_share_read_word(struct usbnet *dev, int phy, u8 reg, + __le16 *value) +{ + int ret; + + mutex_lock(&dev->phy_mutex); + + sr_write_reg(dev, SR_EPAR, phy ? (reg | EPAR_PHY_ADR) : reg); + sr_write_reg(dev, SR_EPCR, phy ? (EPCR_EPOS | EPCR_ERPRR) : EPCR_ERPRR); + + ret = wait_phy_eeprom_ready(dev, phy); + if (ret < 0) + goto out_unlock; + + sr_write_reg(dev, SR_EPCR, 0x0); + ret = sr_read(dev, SR_EPDR, 2, value); + + netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n", + phy, reg, *value, ret); + +out_unlock: + mutex_unlock(&dev->phy_mutex); + return ret; +} + +static int sr_share_write_word(struct usbnet *dev, int phy, u8 reg, + __le16 value) +{ + int ret; + + mutex_lock(&dev->phy_mutex); + + ret = sr_write(dev, SR_EPDR, 2, &value); + if (ret < 0) + goto out_unlock; + + sr_write_reg(dev, SR_EPAR, phy ? (reg | EPAR_PHY_ADR) : reg); + sr_write_reg(dev, SR_EPCR, phy ? (EPCR_WEP | EPCR_EPOS | EPCR_ERPRW) : + (EPCR_WEP | EPCR_ERPRW)); + + ret = wait_phy_eeprom_ready(dev, phy); + if (ret < 0) + goto out_unlock; + + sr_write_reg(dev, SR_EPCR, 0x0); + +out_unlock: + mutex_unlock(&dev->phy_mutex); + return ret; +} + +static int sr_read_eeprom_word(struct usbnet *dev, u8 offset, void *value) +{ + return sr_share_read_word(dev, 0, offset, value); +} + +static int sr9700_get_eeprom_len(struct net_device *netdev) +{ + return SR_EEPROM_LEN; +} + +static int sr9700_get_eeprom(struct net_device *netdev, + struct ethtool_eeprom *eeprom, u8 *data) +{ + struct usbnet *dev = netdev_priv(netdev); + __le16 *buf = (__le16 *)data; + int ret = 0; + int i; + + /* access is 16bit */ + if ((eeprom->offset & 0x01) || (eeprom->len & 0x01)) + return -EINVAL; + + for (i = 0; i < eeprom->len / 2; i++) { + ret = sr_read_eeprom_word(dev, eeprom->offset / 2 + i, buf + i); + if (ret < 0) + break; + } + + return ret; +} + +static int sr_mdio_read(struct net_device *netdev, int phy_id, int loc) +{ + struct usbnet *dev = netdev_priv(netdev); + __le16 res; + int rc = 0; + + if (phy_id) { + netdev_dbg(netdev, "Only internal phy supported\n"); + return 0; + } + + /* Access NSR_LINKST bit for link status instead of MII_BMSR */ + if (loc == MII_BMSR) { + u8 value; + + sr_read_reg(dev, SR_NSR, &value); + if (value & NSR_LINKST) + rc = 1; + } + sr_share_read_word(dev, 1, loc, &res); + if (rc == 1) + res = le16_to_cpu(res) | BMSR_LSTATUS; + else + res = le16_to_cpu(res) & ~BMSR_LSTATUS; + + netdev_dbg(netdev, "sr_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", + phy_id, loc, res); + + return res; +} + +static void sr_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(netdev, "Only internal phy supported\n"); + return; + } + + netdev_dbg(netdev, "sr_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", + phy_id, loc, val); + + sr_share_write_word(dev, 1, loc, res); +} + +static u32 sr9700_get_link(struct net_device *netdev) +{ + struct usbnet *dev = netdev_priv(netdev); + u8 value = 0; + int rc = 0; + + /* Get the Link Status directly */ + sr_read_reg(dev, SR_NSR, &value); + if (value & NSR_LINKST) + rc = 1; + + return rc; +} + +static int sr9700_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) +{ + struct usbnet *dev = netdev_priv(netdev); + + return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); +} + +static const struct ethtool_ops sr9700_ethtool_ops = { + .get_drvinfo = usbnet_get_drvinfo, + .get_link = sr9700_get_link, + .get_msglevel = usbnet_get_msglevel, + .set_msglevel = usbnet_set_msglevel, + .get_eeprom_len = sr9700_get_eeprom_len, + .get_eeprom = sr9700_get_eeprom, + .nway_reset = usbnet_nway_reset, + .get_link_ksettings = usbnet_get_link_ksettings_mii, + .set_link_ksettings = usbnet_set_link_ksettings_mii, +}; + +static void sr9700_set_multicast(struct net_device *netdev) +{ + struct usbnet *dev = netdev_priv(netdev); + /* 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; + /* rx_ctl setting : enable, disable_long, disable_crc */ + u8 rx_ctl = RCR_RXEN | RCR_DIS_CRC | RCR_DIS_LONG; + + memset(hashes, 0x00, SR_MCAST_SIZE); + /* broadcast address */ + hashes[SR_MCAST_SIZE - 1] |= SR_MCAST_ADDR_FLAG; + if (netdev->flags & IFF_PROMISC) { + rx_ctl |= RCR_PRMSC; + } else if (netdev->flags & IFF_ALLMULTI || + netdev_mc_count(netdev) > SR_MCAST_MAX) { + rx_ctl |= RCR_RUNT; + } else if (!netdev_mc_empty(netdev)) { + struct netdev_hw_addr *ha; + + netdev_for_each_mc_addr(ha, netdev) { + u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26; + hashes[crc >> 3] |= 1 << (crc & 0x7); + } + } + + sr_write_async(dev, SR_MAR, SR_MCAST_SIZE, hashes); + sr_write_reg_async(dev, SR_RCR, rx_ctl); +} + +static int sr9700_set_mac_address(struct net_device *netdev, void *p) +{ + struct usbnet *dev = netdev_priv(netdev); + struct sockaddr *addr = p; + + if (!is_valid_ether_addr(addr->sa_data)) { + netdev_err(netdev, "not setting invalid mac address %pM\n", + addr->sa_data); + return -EINVAL; + } + + eth_hw_addr_set(netdev, addr->sa_data); + sr_write_async(dev, SR_PAR, 6, netdev->dev_addr); + + return 0; +} + +static const struct net_device_ops sr9700_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 = dev_get_tstats64, + .ndo_validate_addr = eth_validate_addr, + .ndo_eth_ioctl = sr9700_ioctl, + .ndo_set_rx_mode = sr9700_set_multicast, + .ndo_set_mac_address = sr9700_set_mac_address, +}; + +static int sr9700_bind(struct usbnet *dev, struct usb_interface *intf) +{ + struct net_device *netdev; + struct mii_if_info *mii; + u8 addr[ETH_ALEN]; + int ret; + + ret = usbnet_get_endpoints(dev, intf); + if (ret) + goto out; + + netdev = dev->net; + + netdev->netdev_ops = &sr9700_netdev_ops; + netdev->ethtool_ops = &sr9700_ethtool_ops; + netdev->hard_header_len += SR_TX_OVERHEAD; + dev->hard_mtu = netdev->mtu + netdev->hard_header_len; + /* bulkin buffer is preferably not less than 3K */ + dev->rx_urb_size = 3072; + + mii = &dev->mii; + mii->dev = netdev; + mii->mdio_read = sr_mdio_read; + mii->mdio_write = sr_mdio_write; + mii->phy_id_mask = 0x1f; + mii->reg_num_mask = 0x1f; + + sr_write_reg(dev, SR_NCR, NCR_RST); + udelay(20); + + /* read MAC + * After Chip Power on, the Chip will reload the MAC from + * EEPROM automatically to PAR. In case there is no EEPROM externally, + * a default MAC address is stored in PAR for making chip work properly. + */ + if (sr_read(dev, SR_PAR, ETH_ALEN, addr) < 0) { + netdev_err(netdev, "Error reading MAC address\n"); + ret = -ENODEV; + goto out; + } + eth_hw_addr_set(netdev, addr); + + /* power up and reset phy */ + sr_write_reg(dev, SR_PRR, PRR_PHY_RST); + /* at least 10ms, here 20ms for safe */ + msleep(20); + sr_write_reg(dev, SR_PRR, 0); + /* at least 1ms, here 2ms for reading right register */ + udelay(2 * 1000); + + /* receive broadcast packets */ + sr9700_set_multicast(netdev); + + sr_mdio_write(netdev, mii->phy_id, MII_BMCR, BMCR_RESET); + sr_mdio_write(netdev, mii->phy_id, MII_ADVERTISE, ADVERTISE_ALL | + ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP); + mii_nway_restart(mii); + +out: + return ret; +} + +static int sr9700_rx_fixup(struct usbnet *dev, struct sk_buff *skb) +{ + struct sk_buff *sr_skb; + int len; + + /* skb content (packets) format : + * p0 p1 p2 ...... pm + * / \ + * / \ + * / \ + * / \ + * p0b0 p0b1 p0b2 p0b3 ...... p0b(n-4) p0b(n-3)...p0bn + * + * p0 : packet 0 + * p0b0 : packet 0 byte 0 + * + * b0: rx status + * b1: packet length (incl crc) low + * b2: packet length (incl crc) high + * b3..n-4: packet data + * bn-3..bn: ethernet packet crc + */ + if (unlikely(skb->len < SR_RX_OVERHEAD)) { + netdev_err(dev->net, "unexpected tiny rx frame\n"); + return 0; + } + + /* one skb may contains multiple packets */ + while (skb->len > SR_RX_OVERHEAD) { + if (skb->data[0] != 0x40) + return 0; + + /* ignore the CRC length */ + len = (skb->data[1] | (skb->data[2] << 8)) - 4; + + if (len > ETH_FRAME_LEN || len > skb->len || len < 0) + return 0; + + /* the last packet of current skb */ + if (skb->len == (len + SR_RX_OVERHEAD)) { + skb_pull(skb, 3); + skb->len = len; + skb_set_tail_pointer(skb, len); + skb->truesize = len + sizeof(struct sk_buff); + return 2; + } + + /* skb_clone is used for address align */ + sr_skb = skb_clone(skb, GFP_ATOMIC); + if (!sr_skb) + return 0; + + sr_skb->len = len; + sr_skb->data = skb->data + 3; + skb_set_tail_pointer(sr_skb, len); + sr_skb->truesize = len + sizeof(struct sk_buff); + usbnet_skb_return(dev, sr_skb); + + skb_pull(skb, len + SR_RX_OVERHEAD); + } + + return 0; +} + +static struct sk_buff *sr9700_tx_fixup(struct usbnet *dev, struct sk_buff *skb, + gfp_t flags) +{ + int len; + + /* SR9700 can only send out one ethernet packet at once. + * + * b0 b1 b2 b3 ...... b(n-4) b(n-3)...bn + * + * b0: rx status + * b1: packet length (incl crc) low + * b2: packet length (incl crc) high + * b3..n-4: packet data + * bn-3..bn: ethernet packet crc + */ + + len = skb->len; + + if (skb_cow_head(skb, SR_TX_OVERHEAD)) { + dev_kfree_skb_any(skb); + return NULL; + } + + __skb_push(skb, SR_TX_OVERHEAD); + + /* usbnet adds padding if length is a multiple of packet size + * if so, adjust length value in header + */ + if ((skb->len % dev->maxpacket) == 0) + len++; + + skb->data[0] = len; + skb->data[1] = len >> 8; + + return skb; +} + +static void sr9700_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 sr9700_link_reset(struct usbnet *dev) +{ + struct ethtool_cmd ecmd; + + mii_check_media(&dev->mii, 1, 1); + mii_ethtool_gset(&dev->mii, &ecmd); + + netdev_dbg(dev->net, "link_reset() speed: %d duplex: %d\n", + ecmd.speed, ecmd.duplex); + + return 0; +} + +static const struct driver_info sr9700_driver_info = { + .description = "CoreChip SR9700 USB Ethernet", + .flags = FLAG_ETHER, + .bind = sr9700_bind, + .rx_fixup = sr9700_rx_fixup, + .tx_fixup = sr9700_tx_fixup, + .status = sr9700_status, + .link_reset = sr9700_link_reset, + .reset = sr9700_link_reset, +}; + +static const struct usb_device_id products[] = { + { + USB_DEVICE(0x0fe6, 0x9700), /* SR9700 device */ + .driver_info = (unsigned long)&sr9700_driver_info, + }, + {}, /* END */ +}; + +MODULE_DEVICE_TABLE(usb, products); + +static struct usb_driver sr9700_usb_driver = { + .name = "sr9700", + .id_table = products, + .probe = usbnet_probe, + .disconnect = usbnet_disconnect, + .suspend = usbnet_suspend, + .resume = usbnet_resume, + .disable_hub_initiated_lpm = 1, +}; + +module_usb_driver(sr9700_usb_driver); + +MODULE_AUTHOR("liujl "); +MODULE_DESCRIPTION("SR9700 one chip USB 1.1 USB to Ethernet device from http://www.corechip-sz.com/"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3