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Message-ID: <CACVXFVMdgx1we67poF5yU5pAYRYoA9Ao1EJqQgGBaaORuARFQQ@mail.gmail.com>
Date: Fri, 11 Jan 2013 10:45:38 +0800
From: Ming Lei <ming.lei@...onical.com>
To: freddy@...x.com.tw
Cc: davem@...emloft.net, linux-kernel@...r.kernel.org,
louis@...x.com.tw, netdev@...r.kernel.org,
linux-usb@...r.kernel.org
Subject: Re: [PATCH] ax88179_178a: ASIX AX88179_178A USB 3.0/2.0 to gigabit
ethernet adapter driver
Cc netdev and usb lists.
On Fri, Jan 11, 2013 at 9:17 AM, <freddy@...x.com.tw> wrote:
> From: Freddy Xin <freddy@...x.com.tw>
>
> This patch adds a driver for ASIX's AX88179 family of USB 3.0/2.0
> to gigabit ethernet adapters. It's based on the AX88xxx driver but
> the usb commands used to access registers for AX88179 are completely different.
> This driver had been verified on x86 system with AX88179/AX88178A and
> Sitcomm LN-032 USB dongles.
>
> Signed-off-by: Freddy Xin <freddy@...x.com.tw>
> ---
> drivers/net/usb/Kconfig | 18 +
> drivers/net/usb/Makefile | 1 +
> drivers/net/usb/ax88179_178a.c | 1457 ++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 1476 insertions(+)
> create mode 100644 drivers/net/usb/ax88179_178a.c
>
> diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
> index ef97621..75af401 100644
> --- a/drivers/net/usb/Kconfig
> +++ b/drivers/net/usb/Kconfig
> @@ -158,6 +158,24 @@ config USB_NET_AX8817X
> This driver creates an interface named "ethX", where X depends on
> what other networking devices you have in use.
>
> +config USB_NET_AX88179_178A
> + tristate "ASIX AX88179/178A USB 3.0/2.0 to Gigabit Ethernet"
> + depends on USB_USBNET
> + select CRC32
> + select PHYLIB
> + default y
> + help
> + This option adds support for ASIX AX88179 based USB 3.0/2.0
> + to Gigabit Ethernet adapters.
> +
> + This driver should work with at least the following devices:
> + * ASIX AX88179
> + * ASIX AX88178A
> + * Sitcomm LN-032
> +
> + This driver creates an interface named "ethX", where X depends on
> + what other networking devices you have in use.
> +
> config USB_NET_CDCETHER
> tristate "CDC Ethernet support (smart devices such as cable modems)"
> depends on USB_USBNET
> diff --git a/drivers/net/usb/Makefile b/drivers/net/usb/Makefile
> index 4786913..ce01578 100644
> --- a/drivers/net/usb/Makefile
> +++ b/drivers/net/usb/Makefile
> @@ -9,6 +9,7 @@ obj-$(CONFIG_USB_RTL8150) += rtl8150.o
> obj-$(CONFIG_USB_HSO) += hso.o
> obj-$(CONFIG_USB_NET_AX8817X) += asix.o
> asix-y := asix_devices.o asix_common.o ax88172a.o
> +obj-$(CONFIG_USB_NET_AX88179_178A) += ax88179_178a.o
> obj-$(CONFIG_USB_NET_CDCETHER) += cdc_ether.o
> obj-$(CONFIG_USB_NET_CDC_EEM) += cdc_eem.o
> obj-$(CONFIG_USB_NET_DM9601) += dm9601.o
> diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c
> new file mode 100644
> index 0000000..47504ea
> --- /dev/null
> +++ b/drivers/net/usb/ax88179_178a.c
> @@ -0,0 +1,1457 @@
> +/*
> + * ASIX AX88179/178A USB 3.0/2.0 to Gigabit Ethernet Devices
> + *
> + * Copyright (C) 20011-2012 ASIX
> + *
> + * 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 (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
> + *
> + */
> +
> +#include <linux/module.h>
> +#include <linux/etherdevice.h>
> +#include <linux/mii.h>
> +#include <linux/usb.h>
> +#include <linux/crc32.h>
> +#include <linux/usb/usbnet.h>
> +
> +
> +#define AX88179_PHY_ID 0x03
> +#define AX_EEPROM_LEN 0x100
> +#define AX_MCAST_FILTER_SIZE 8
> +#define AX_MAX_MCAST 64
> +#define AX_RX_CHECKSUM 1
> +#define AX_TX_CHECKSUM 2
> +#define AX_INT_PPLS_LINK BIT(0)
> +#define AX_RXHDR_L4_TYPE_UDP 1
> +#define AX_RXHDR_L4_TYPE_TCP 4
> +#define AX_ACCESS_MAC 0x01
> +#define AX_ACCESS_PHY 0x02
> +#define AX_ACCESS_EEPROM 0x04
> +#define AX_ACCESS_EFUSE 0x05
> +#define AX_PAUSE_WATERLVL_HIGH 0x54
> +#define AX_PAUSE_WATERLVL_LOW 0x55
> +
> +#define PHYSICAL_LINK_STATUS 0x02
> + #define AX_USB_SS 0x04
> + #define AX_USB_HS 0x02
> + #define AX_USB_FS 0x01
> +
> +#define GENERAL_STATUS 0x03
> +/* Check AX88179 version. UA1:Bit2 = 0, UA2:Bit2 = 1 */
> + #define AX_SECLD 0x04
> +
> +#define AX_SROM_ADDR 0x07
> +#define AX_SROM_CMD 0x0a
> + #define EEP_RD 0x04
> + #define EEP_BUSY 0x10
> +
> +
> +#define AX_SROM_DATA_LOW 0x08
> +#define AX_SROM_DATA_HIGH 0x09
> +
> +#define AX_RX_CTL 0x0b
> + #define AX_RX_CTL_DROPCRCERR 0x0100
> + #define AX_RX_CTL_IPE 0x0200
> + #define AX_RX_CTL_START 0x0080
> + #define AX_RX_CTL_AP 0x0020
> + #define AX_RX_CTL_AM 0x0010
> + #define AX_RX_CTL_AB 0x0008
> + #define AX_RX_CTL_AMALL 0x0002
> + #define AX_RX_CTL_PRO 0x0001
> + #define AX_RX_CTL_STOP 0x0000
> +
> +#define AX_NODE_ID 0x10
> +#define AX_MULTI_FILTER_ARRY 0x16
> +
> +#define AX_MEDIUM_STATUS_MODE 0x22
> + #define AX_MEDIUM_GIGAMODE 0x01
> + #define AX_MEDIUM_FULL_DUPLEX 0x02
> + #define AX_MEDIUM_ALWAYS_ONE 0x04
> + #define AX_MEDIUM_RXFLOW_CTRLEN 0x10
> + #define AX_MEDIUM_TXFLOW_CTRLEN 0x20
> + #define AX_MEDIUM_RECEIVE_EN 0x100
> + #define AX_MEDIUM_PS 0x200
> +
> +#define AX_MONITOR_MODE 0x24
> + #define AX_MONITOR_MODE_RWLC 0x02
> + #define AX_MONITOR_MODE_RWMP 0x04
> + #define AX_MONITOR_MODE_PMEPOL 0x20
> + #define AX_MONITOR_MODE_PMETYPE 0x40
> +
> +#define AX_GPIO_CTRL 0x25
> + #define AX_GPIO_CTRL_GPIO3EN 0x80
> + #define AX_GPIO_CTRL_GPIO2EN 0x40
> + #define AX_GPIO_CTRL_GPIO1EN 0x20
> +
> +#define AX_PHYPWR_RSTCTL 0x26
> + #define AX_PHYPWR_RSTCTL_BZ 0x0010
> + #define AX_PHYPWR_RSTCTL_IPRL 0x0020
> + #define AX_PHYPWR_RSTCTL_AT 0x1000
> +
> +#define AX_RX_BULKIN_QCTRL 0x2e
> +#define AX_CLK_SELECT 0x33
> + #define AX_CLK_SELECT_BCS 0x01
> + #define AX_CLK_SELECT_ACS 0x02
> + #define AX_CLK_SELECT_ULR 0x08
> +
> +#define AX_RXCOE_CTL 0x34
> + #define AX_RXCOE_IP 0x01
> + #define AX_RXCOE_TCP 0x02
> + #define AX_RXCOE_UDP 0x04
> + #define AX_RXCOE_TCPV6 0x20
> + #define AX_RXCOE_UDPV6 0x40
> +
> +#define AX_TXCOE_CTL 0x35
> + #define AX_TXCOE_IP 0x01
> + #define AX_TXCOE_TCP 0x02
> + #define AX_TXCOE_UDP 0x04
> + #define AX_TXCOE_TCPV6 0x20
> + #define AX_TXCOE_UDPV6 0x40
> +
> +#define AX_LEDCTRL 0x73
> +
> +#define GMII_PHY_CONTROL 0x00
> + #define GMII_CONTROL_1000MB 0x0040
> + #define GMII_CONTROL_ENAUTO 0x1000
> + #define GMII_CONTROL_START_AUTO 0x0200
> + #define GMII_CONTROL_FULLDUPLEX 0x0100
> +
> +#define GMII_PHY_PHYSR 0x11
> + #define GMII_PHY_PHYSR_SMASK 0xc000
> + #define GMII_PHY_PHYSR_GIGA 0x8000
> + #define GMII_PHY_PHYSR_100 0x4000
> + #define GMII_PHY_PHYSR_FULL 0x2000
> + #define GMII_PHY_PHYSR_LINK 0x400
> +
> +#define GMII_LED_ACTIVE 0x1a
> + #define GMII_LED_ACTIVE_MASK 0xff8fd
> + #define GMII_LED0_ACTIVE BIT(4)
> + #define GMII_LED1_ACTIVE BIT(5)
> + #define GMII_LED2_ACTIVE BIT(6)
> +
> +#define GMII_LED_LINK 0x1c
> + #define GMII_LED_LINK_MASK 0xf888
> +
> + #define GMII_LED0_LINK_10 BIT(0)
> + #define GMII_LED0_LINK_100 BIT(1)
> + #define GMII_LED0_LINK_1000 BIT(2)
> + #define GMII_LED1_LINK_10 BIT(4)
> + #define GMII_LED1_LINK_100 BIT(5)
> + #define GMII_LED1_LINK_1000 BIT(6)
> + #define GMII_LED2_LINK_10 BIT(8)
> + #define GMII_LED2_LINK_100 BIT(9)
> + #define GMII_LED2_LINK_1000 BIT(10)
> +
> + #define LED0_ACTIVE BIT(0)
> + #define LED0_LINK_10 BIT(1)
> + #define LED0_LINK_100 BIT(2)
> + #define LED0_LINK_1000 BIT(3)
> + #define LED0_FD BIT(4)
> + #define LED0_USB3_MASK 0x001f
> +
> + #define LED1_ACTIVE BIT(5)
> + #define LED1_LINK_10 BIT(6)
> + #define LED1_LINK_100 BIT(7)
> + #define LED1_LINK_1000 BIT(8)
> + #define LED1_FD BIT(9)
> + #define LED1_USB3_MASK 0x03e0
> +
> + #define LED2_ACTIVE BIT(10)
> + #define LED2_LINK_1000 BIT(13)
> + #define LED2_LINK_100 BIT(12)
> + #define LED2_LINK_10 BIT(11)
> + #define LED2_FD BIT(14)
> + #define LED_VALID BIT(15)
> + #define LED2_USB3_MASK 0x7c00
> +
> +#define GMII_PHYPAGE 0x1e
> +#define GMII_PHY_PAGE_SELECT 0x1f
> + #define GMII_PHY_PGSEL_EXT 0x0007
> + #define GMII_PHY_PGSEL_PAGE0 0X0000
> +
> +struct ax88179_data {
> + u16 rxctl;
> +};
> +
> +struct ax88179_int_data {
> + u16 res1;
> + u8 link;
> + u16 res2;
> + u8 status;
> + u16 res3;
> +} __packed;
> +
> +struct {unsigned char ctrl, timer_l, timer_h, size, ifg; }
> +AX88179_BULKIN_SIZE[] = {
> + {7, 0xa3, 0, 0x14, 0xff},
> + {7, 0x1e, 5, 0x18, 0xff},
> + {7, 0xae, 7, 0x18, 0xff},
> + {7, 0xcc, 0x4c, 0x18, 8},
> +};
> +
> +struct ax88179_rx_pkt_header {
> +
> + u8 l4_csum_err:1,
> + l3_csum_err:1,
> + l4_type:3,
> + l3_type:2,
> + ce:1;
> +
> + u8 vlan_ind:3,
> + rx_ok:1,
> + pri:3,
> + bmc:1;
> +
> + u16 len:13,
> + crc:1,
> + mii:1,
> + drop:1;
> +
> +} __packed;
> +
> +static int ax88179_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
> + u16 size, void *data)
> +{
> + int ret;
> + ret = usbnet_read_cmd(dev, cmd,
> + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
> + value, index, data, size);
> +
> + if (ret != size && ret >= 0)
> + return -EINVAL;
> + return ret;
> +}
> +
> +static int ax88179_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
> + u16 size, void *data)
> +{
> + return usbnet_write_cmd(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR
> + | USB_RECIP_DEVICE, value, index, data, size);
> +}
> +
> +static void
> +ax88179_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
> + u16 size, void *data)
> +{
> + usbnet_write_cmd_async(dev, cmd,
> + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
> + value, index, data, size);
> +}
> +
> +static void ax88179_status(struct usbnet *dev, struct urb *urb)
> +{
> + struct ax88179_int_data *event;
> + int link;
> +
> + if (urb->actual_length < 8)
> + return;
> +
> + event = urb->transfer_buffer;
> + link = event->link & AX_INT_PPLS_LINK;
> + if (netif_carrier_ok(dev->net) != link) {
> + if (link)
> + usbnet_defer_kevent(dev, EVENT_LINK_RESET);
> + else
> + netif_carrier_off(dev->net);
> + netdev_info(dev->net, "ax8817X - Link status is: %d\n", link);
> + }
> +}
> +
> +static int ax88179_mdio_read(struct net_device *netdev, int phy_id, int loc)
> +{
> + struct usbnet *dev = netdev_priv(netdev);
> + __u16 *res;
> + u16 ret;
> +
> + res = kmalloc(2, GFP_ATOMIC);
You needn't to allocate several bytes just for transferring one command
any more since usbnet_{read|write}_cmd() has handled that already,
so one simple stack variable is OK.
Also GFP_ATOMIC should be changed to GFP_KERNEL.
> + if (!res)
> + return 0;
> +
> + ax88179_read_cmd(dev, AX_ACCESS_PHY, phy_id, (__u16)loc, 2, res);
> +
> + ret = *res & 0xffff;
> + kfree(res);
> +
> + return le16_to_cpu(ret);
> +}
> +
> +static void
> +ax88179_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
> +{
> + struct usbnet *dev = netdev_priv(netdev);
> + __le16 *res;
> +
> + res = kmalloc(2, GFP_ATOMIC);
Same with above.
> + if (!res)
> + return;
> +
> + *res = cpu_to_le16(val);
> +
> + ax88179_write_cmd(dev, AX_ACCESS_PHY, phy_id, (__u16)loc, 2, res);
> +
> + kfree(res);
> +}
> +
> +static int ax88179_suspend(struct usb_interface *intf, pm_message_t message)
> +{
> + struct usbnet *dev = usb_get_intfdata(intf);
> + u16 *tmp16;
> +
> + usbnet_suspend(intf, message);
> +
> + tmp16 = kmalloc(2, GFP_KERNEL);
Same with above.
> + if (!tmp16)
> + return 0;
> +
> + /* Disable RX path */
> + ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_MEDIUM_STATUS_MODE, 2, 2, tmp16);
> + *tmp16 &= ~AX_MEDIUM_RECEIVE_EN;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_MEDIUM_STATUS_MODE, 2, 2, tmp16);
> +
> + /* Force bulk-in zero length */
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
> + *tmp16 |= AX_PHYPWR_RSTCTL_BZ | AX_PHYPWR_RSTCTL_IPRL;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
> +
> + /* change clock */
> + *tmp16 = 0;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp16);
> +
> + /* Configure RX control register => stop operation */
> + *tmp16 = AX_RX_CTL_STOP;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, tmp16);
All the above ax88179_{write|read}_cmd in PM callback should be converted
to its _nopm version, see example in drivers/net/usb/smsc95xx.c. Otherwise,
deadlock will be caused during runtime PM.
> + kfree(tmp16);
> + return 0;
> +}
> +
> +/* This function is used to enable the autodetach function. */
> +/* This function is determined by offset 0x43 of EEPROM */
> +static int ax88179_auto_detach(struct usbnet *dev, int flags)
> +{
> + u16 *tmp;
> +
> + tmp = kmalloc(2, flags);
> + if (!tmp)
> + return -ENOMEM;
> +
> + if (ax88179_read_cmd(dev, AX_ACCESS_EEPROM, 0x43, 1, 2, tmp) < 0) {
> + kfree(tmp);
> + return 0;
> + }
> +
> + if ((*tmp == 0xFFFF) || (!(*tmp & 0x0100))) {
> + kfree(tmp);
> + return 0;
> + }
> +
> + /* Enable Auto Detach bit */
> + *tmp = 0;
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp);
> + *tmp |= AX_CLK_SELECT_ULR;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp);
> + *tmp |= AX_PHYPWR_RSTCTL_AT;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp);
> + kfree(tmp);
> +
> + return 0;
> +}
Considered that ax88179_auto_detach() is called in both non-PM and
PM path, so it is better to pass one 'in_pm' parameter to support the
two cases, see example of smsc95xx_start_rx_path().
> +
> +static int ax88179_resume(struct usb_interface *intf)
> +{
> + struct usbnet *dev = usb_get_intfdata(intf);
> + u16 *tmp16;
> +
> + tmp16 = kmalloc(2, GFP_KERNEL);
Same with above.
> + if (!tmp16)
> + return usbnet_resume(intf);
> +
> + netif_carrier_off(dev->net);
> +
> + /* Power up ethernet PHY */
> + *tmp16 = 0;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
> + udelay(1000);
> + *tmp16 = AX_PHYPWR_RSTCTL_IPRL;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
> + msleep(200);
> +
> + /* Ethernet PHY Auto Detach*/
> + ax88179_auto_detach(dev, GFP_ATOMIC);
> +
> + /* enable clock */
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp16);
> + *tmp16 |= AX_CLK_SELECT_ACS | AX_CLK_SELECT_BCS;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp16);
> + msleep(100);
> +
> + /* Configure RX control register => start operation */
> + *tmp16 = AX_RX_CTL_DROPCRCERR | AX_RX_CTL_IPE | AX_RX_CTL_START |
> + AX_RX_CTL_AP | AX_RX_CTL_AMALL | AX_RX_CTL_AB;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, tmp16);
All the above ax88179_{write|read}_cmd in PM callback should be converted
to its _nopm version, see example in drivers/net/usb/smsc95xx.c. Otherwise,
deadlock will be caused during runtime PM.
> +
> + kfree(tmp16);
> + return usbnet_resume(intf);
> +}
> +
> +static void
> +ax88179_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
> +{
> + struct usbnet *dev = netdev_priv(net);
> + u8 *opt;
> +
> + wolinfo->supported = 0;
> + wolinfo->wolopts = 0;
> +
> + opt = kmalloc(1, GFP_KERNEL);
Same with above.
> + if (!opt)
> + return;
> +
> + if (ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_MONITOR_MODE, 1, 1, opt) < 0) {
> + kfree(opt);
> + return;
> + }
> +
> + wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
> +
> + if (*opt & AX_MONITOR_MODE_RWLC)
> + wolinfo->wolopts |= WAKE_PHY;
> + if (*opt & AX_MONITOR_MODE_RWMP)
> + wolinfo->wolopts |= WAKE_MAGIC;
> +
> + kfree(opt);
> +}
> +
> +static int
> +ax88179_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
> +{
> + struct usbnet *dev = netdev_priv(net);
> + u8 *opt;
> +
> + opt = kmalloc(1, GFP_KERNEL);
Same with above.
> + if (!opt)
> + return -ENOMEM;
> +
> + *opt = 0;
> + if (ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_MONITOR_MODE, 1, 1, opt) < 0) {
> + kfree(opt);
> + return 0;
> + }
> +
> + if (wolinfo->wolopts & WAKE_PHY)
> + *opt |= AX_MONITOR_MODE_RWLC;
> + else
> + *opt &= ~AX_MONITOR_MODE_RWLC;
> +
> + if (wolinfo->wolopts & WAKE_MAGIC)
> + *opt |= AX_MONITOR_MODE_RWMP;
> + else
> + *opt &= ~AX_MONITOR_MODE_RWMP;
> +
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MODE, 1, 1, opt);
> + kfree(opt);
> +
> + return 0;
> +}
> +
> +static int ax88179_get_eeprom_len(struct net_device *net)
> +{
> + return AX_EEPROM_LEN;
> +}
> +
> +static int ax88179_get_eeprom(struct net_device *net,
> + struct ethtool_eeprom *eeprom, u8 *data)
> +{
> + struct usbnet *dev = netdev_priv(net);
> + u16 *ebuf = (u16 *)data;
> + int i;
> +
> + /* Crude hack to ensure that we don't overwrite memory
> + * if an odd length is supplied
> + */
> + if (eeprom->len % 2)
> + return -EINVAL;
> +
> + /* ax8817x returns 2 bytes from eeprom on read */
> + for (i = 0; i < eeprom->len / 2; i++) {
> + if (ax88179_read_cmd(dev, AX_ACCESS_EEPROM,
> + eeprom->offset + i, 1, 2, &ebuf[i]) < 0)
> + return -EINVAL;
> + }
> + return 0;
> +}
> +
> +static int ax88179_get_settings(struct net_device *net, struct ethtool_cmd *cmd)
> +{
> + struct usbnet *dev = netdev_priv(net);
> + return mii_ethtool_gset(&dev->mii, cmd);
> +}
> +
> +static int ax88179_set_settings(struct net_device *net, struct ethtool_cmd *cmd)
> +{
> + struct usbnet *dev = netdev_priv(net);
> + return mii_ethtool_sset(&dev->mii, cmd);
> +}
> +
> +
> +static int ax88179_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 ax88179_ethtool_ops = {
> + .get_link = ethtool_op_get_link,
> + .get_msglevel = usbnet_get_msglevel,
> + .set_msglevel = usbnet_set_msglevel,
> + .get_wol = ax88179_get_wol,
> + .set_wol = ax88179_set_wol,
> + .get_eeprom_len = ax88179_get_eeprom_len,
> + .get_eeprom = ax88179_get_eeprom,
> + .get_settings = ax88179_get_settings,
> + .set_settings = ax88179_set_settings,
> + .nway_reset = usbnet_nway_reset,
> +};
> +
> +static void ax88179_set_multicast(struct net_device *net)
> +{
> + struct usbnet *dev = netdev_priv(net);
> + struct ax88179_data *data = (struct ax88179_data *)dev->data;
> + u8 *m_filter = ((u8 *)dev->data) + 12;
> + u16 rx_ctl = (AX_RX_CTL_START | AX_RX_CTL_AB | AX_RX_CTL_IPE);
> + int mc_count;
> +
> + mc_count = netdev_mc_count(net);
> +
> + if (net->flags & IFF_PROMISC) {
> + rx_ctl |= AX_RX_CTL_PRO;
> + } else if (net->flags & IFF_ALLMULTI
> + || mc_count > AX_MAX_MCAST) {
> + rx_ctl |= AX_RX_CTL_AMALL;
> + } else if (mc_count == 0) {
> + /* 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
> + */
> + u32 crc_bits;
> + struct netdev_hw_addr *ha;
> + memset(m_filter, 0, AX_MCAST_FILTER_SIZE);
> + netdev_for_each_mc_addr(ha, net) {
> + crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
> + *(m_filter + (crc_bits >> 3)) |=
> + 1 << (crc_bits & 7);
> + }
> +
> + ax88179_write_cmd_async(dev, AX_ACCESS_MAC,
> + AX_MULTI_FILTER_ARRY, AX_MCAST_FILTER_SIZE,
> + AX_MCAST_FILTER_SIZE, m_filter);
> +
> + rx_ctl |= AX_RX_CTL_AM;
> + }
> +
> + data->rxctl = rx_ctl;
> + ax88179_write_cmd_async(dev, AX_ACCESS_MAC,
> + AX_RX_CTL, 2, 2, &data->rxctl);
> +}
> +
> +static struct net_device_stats *ax88179_get_stats(struct net_device *net)
> +{
> + return &net->stats;
> +}
> +
> +static int
> +ax88179_set_features(struct net_device *net, netdev_features_t features)
> +{
> + u8 *tmp;
> + struct usbnet *dev = netdev_priv(net);
> + netdev_features_t changed = net->features ^ features;
> +
> + tmp = kmalloc(1, GFP_KERNEL);
Same with above.
> + if (!tmp)
> + return -ENOMEM;
> +
> + if (changed & NETIF_F_TSO)
> + net->features ^= NETIF_F_TSO;
> +
> + if (changed & NETIF_F_SG)
> + net->features ^= NETIF_F_SG;
> +
> + if (changed & NETIF_F_IP_CSUM) {
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, tmp);
> +
> + *tmp ^= AX_TXCOE_TCP | AX_TXCOE_UDP;
> +
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, tmp);
> +
> + net->features ^= NETIF_F_IP_CSUM;
> + }
> +
> + if (changed & NETIF_F_IPV6_CSUM) {
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, tmp);
> +
> + *tmp ^= AX_TXCOE_TCPV6 | AX_TXCOE_UDPV6;
> +
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, tmp);
> +
> + net->features ^= NETIF_F_IPV6_CSUM;
> + }
> +
> + if (changed & NETIF_F_RXCSUM) {
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_RXCOE_CTL, 1, 1, tmp);
> +
> + *tmp ^= AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
> + AX_RXCOE_TCPV6 | AX_RXCOE_UDPV6;
> +
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RXCOE_CTL, 1, 1, tmp);
> +
> + net->features ^= NETIF_F_RXCSUM;
> + }
> +
> + kfree(tmp);
> +
> + return 0;
> +}
> +
> +static int ax88179_set_mac_addr(struct net_device *net, void *p)
> +{
> + struct usbnet *dev = netdev_priv(net);
> + struct sockaddr *addr = p;
> +
> + memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
> +
> + /* Set the MAC address */
> + return ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_NODE_ID, ETH_ALEN,
> + ETH_ALEN, net->dev_addr);
> +}
> +
> +static const struct net_device_ops ax88179_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_stats = ax88179_get_stats,
> + .ndo_set_mac_address = ax88179_set_mac_addr,
> + .ndo_validate_addr = eth_validate_addr,
> + .ndo_do_ioctl = ax88179_ioctl,
> + .ndo_set_rx_mode = ax88179_set_multicast,
> + .ndo_set_features = ax88179_set_features,
> +};
> +
> +static int ax88179_check_eeprom(struct usbnet *dev, int flags)
> +{
> + u8 i;
> + u8 buf;
> + u8 *eeprom;
> + u16 csum, delay = HZ / 10;
> + unsigned long jtimeout;
> +
> + eeprom = kmalloc(20, flags);
Same with above, also I am wondering if the 'flags' parameter is needed
since ax88179_write_cmd() should be called only in process context.
> + if (!eeprom)
> + return -ENOMEM;
> +
> + /* Read EEPROM content */
> + for (i = 0; i < 6; i++) {
> + buf = i;
> + if (ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_ADDR, 1, 1, &buf) < 0) {
> + kfree(eeprom);
> + return -EINVAL;
> + }
> +
> + buf = EEP_RD;
> + if (ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_CMD, 1, 1, &buf) < 0) {
> + kfree(eeprom);
> + return -EINVAL;
> + }
> +
> + jtimeout = jiffies + delay;
> + do {
> + ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_CMD, 1, 1, &buf);
> +
> + if (time_after(jiffies, jtimeout)) {
> + kfree(eeprom);
> + return -EINVAL;
> + }
> + } while (buf & EEP_BUSY);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_DATA_LOW, 2, 2, eeprom + (i * 2));
> +
> + if ((i == 0) && (*eeprom == 0xFF)) {
> + kfree(eeprom);
> + return -EINVAL;
> + }
> + }
> +
> + csum = *(eeprom + 6) + *(eeprom + 7) + *(eeprom + 8) + *(eeprom + 9);
> + csum = (csum >> 8) + (csum & 0xff);
> +
> + if ((csum + *(eeprom + 10)) != 0xff) {
> + kfree(eeprom);
> + return -EINVAL;
> + }
> +
> + kfree(eeprom);
> + return 0;
> +}
> +
> +static int ax88179_check_efuse(struct usbnet *dev, u16 *ledmode, int flags)
> +{
> + u8 i;
> + u8 *efuse;
> + u16 csum = 0;
> +
> + efuse = kzalloc(64, flags);
Same with above.
> + if (!efuse)
> + return -ENOMEM;
> +
> + if (ax88179_read_cmd(dev, AX_ACCESS_EFUSE, 0, 64, 64, efuse) < 0) {
> + kfree(efuse);
> + return -EINVAL;
> + }
> +
> + if (*efuse == 0xFF) {
> + kfree(efuse);
> + return -EINVAL;
> + }
> +
> + for (i = 0; i < 64; i++)
> + csum = csum + *(efuse + i);
> +
> + while (csum > 255)
> + csum = (csum & 0x00FF) + ((csum >> 8) & 0x00FF);
> +
> + if (csum != 0xFF) {
> + kfree(efuse);
> + return -EINVAL;
> + }
> +
> + memcpy((u8 *)ledmode, efuse + 51, 2);
> + kfree(efuse);
> + return 0;
> +
> +}
> +
> +static int ax88179_convert_old_led(struct usbnet *dev, u8 efuse, u16 *ledvalue)
> +{
> + u16 led;
> +
> + /* Loaded the old eFuse LED Mode */
> + if (efuse) {
> + if (ax88179_read_cmd(dev, AX_ACCESS_EFUSE,
> + 0x18, 1, 2, &led) < 0)
> + return -EINVAL;
> + led &= 0xFF;
> + } else {
> + if (ax88179_read_cmd(dev, AX_ACCESS_EEPROM,
> + 0x3C, 1, 2, &led) < 0)
> + return -EINVAL;
> + led >>= 8;
> + }
> +
> + switch (led) {
> + case 0xFF:
> + led = LED0_ACTIVE | LED1_LINK_10 | LED1_LINK_100 |
> + LED1_LINK_1000 | LED2_ACTIVE | LED2_LINK_10 |
> + LED2_LINK_100 | LED2_LINK_1000 | LED_VALID;
> + break;
> + case 0xFE:
> + led = LED0_ACTIVE | LED1_LINK_1000 | LED2_LINK_100 | LED_VALID;
> + break;
> + case 0xFD:
> + led = LED0_ACTIVE | LED1_LINK_1000 | LED2_LINK_100 |
> + LED2_LINK_10 | LED_VALID;
> + break;
> + case 0xFC:
> + led = LED0_ACTIVE | LED1_ACTIVE | LED1_LINK_1000 | LED2_ACTIVE |
> + LED2_LINK_100 | LED2_LINK_10 | LED_VALID;
> + break;
> + default:
> + led = LED0_ACTIVE | LED1_LINK_10 | LED1_LINK_100 |
> + LED1_LINK_1000 | LED2_ACTIVE | LED2_LINK_10 |
> + LED2_LINK_100 | LED2_LINK_1000 | LED_VALID;
> + break;
> + }
> +
> + memcpy((u8 *)ledvalue, &led, 2);
> + return 0;
> +}
> +
> +static int ax88179_led_setting(struct usbnet *dev, int flags)
> +{
> + u8 ledfd, value = 0;
> + u16 tmp, ledact, ledlink, ledvalue = 0, delay = HZ / 10;
> + unsigned long jtimeout;
> +
> + /* Check AX88179 version. UA1 or UA2*/
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, GENERAL_STATUS, 1, 1, &value);
> +
> + if (!(value & AX_SECLD)) { /* UA1 */
> + value = AX_GPIO_CTRL_GPIO3EN | AX_GPIO_CTRL_GPIO2EN |
> + AX_GPIO_CTRL_GPIO1EN;
> + if (ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_GPIO_CTRL, 1, 1, &value) < 0)
> + return -EINVAL;
> + }
> +
> + /* Check EEPROM */
> + if (!ax88179_check_eeprom(dev, flags)) {
> + value = 0x42;
> + if (ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_ADDR, 1, 1, &value) < 0)
> + return -EINVAL;
> +
> + value = EEP_RD;
> + if (ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_CMD, 1, 1, &value) < 0)
> + return -EINVAL;
> +
> + jtimeout = jiffies + delay;
> + do {
> + ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_CMD, 1, 1, &value);
> +
> + if (time_after(jiffies, jtimeout))
> + return -EINVAL;
> + } while (value & EEP_BUSY);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_DATA_HIGH, 1, 1, &value);
> + ledvalue = (value << 8);
> + ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_SROM_DATA_LOW, 1, 1, &value);
> + ledvalue |= value;
> +
> + /* load internal ROM for defaule setting */
> + if ((ledvalue == 0xFFFF) || ((ledvalue & LED_VALID) == 0))
> + ax88179_convert_old_led(dev, 0, &ledvalue);
> + }
> +
> + /* Check eFuse */
> + else if (!ax88179_check_efuse(dev, &ledvalue, flags)) {
> + if ((ledvalue == 0xFFFF) || ((ledvalue & LED_VALID) == 0))
> + ax88179_convert_old_led(dev, 0, &ledvalue);
> + } else
> + ax88179_convert_old_led(dev, 0, &ledvalue);
> +
> + tmp = GMII_PHY_PGSEL_EXT;
> + ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
> + GMII_PHY_PAGE_SELECT, 2, &tmp);
> +
> + tmp = 0x2c;
> + ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
> + GMII_PHYPAGE, 2, &tmp);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
> + GMII_LED_ACTIVE, 2, &ledact);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
> + GMII_LED_LINK, 2, &ledlink);
> +
> + ledact &= GMII_LED_ACTIVE_MASK;
> + ledlink &= GMII_LED_LINK_MASK;
> +
> +
> + if (ledvalue & LED0_ACTIVE)
> + ledact |= GMII_LED0_ACTIVE;
> +
> + if (ledvalue & LED1_ACTIVE)
> + ledact |= GMII_LED1_ACTIVE;
> +
> + if (ledvalue & LED2_ACTIVE)
> + ledact |= GMII_LED2_ACTIVE;
> +
> + if (ledvalue & LED0_LINK_10)
> + ledlink |= GMII_LED0_LINK_10;
> +
> + if (ledvalue & LED1_LINK_10)
> + ledlink |= GMII_LED1_LINK_10;
> +
> + if (ledvalue & LED2_LINK_10)
> + ledlink |= GMII_LED2_LINK_10;
> +
> + if (ledvalue & LED0_LINK_100)
> + ledlink |= GMII_LED0_LINK_100;
> +
> + if (ledvalue & LED1_LINK_100)
> + ledlink |= GMII_LED1_LINK_100;
> +
> + if (ledvalue & LED2_LINK_100)
> + ledlink |= GMII_LED2_LINK_100;
> +
> + if (ledvalue & LED0_LINK_1000)
> + ledlink |= GMII_LED0_LINK_1000;
> +
> + if (ledvalue & LED1_LINK_1000)
> + ledlink |= GMII_LED1_LINK_1000;
> +
> + if (ledvalue & LED2_LINK_1000)
> + ledlink |= GMII_LED2_LINK_1000;
> +
> +
> + tmp = ledact;
> + ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
> + GMII_LED_ACTIVE, 2, &tmp);
> +
> + tmp = ledlink;
> + ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
> + GMII_LED_LINK, 2, &tmp);
> +
> + tmp = GMII_PHY_PGSEL_PAGE0;
> + ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
> + GMII_PHY_PAGE_SELECT, 2, &tmp);
> +
> + /* LED full duplex setting */
> + ledfd = 0;
> + if (ledvalue & LED0_FD)
> + ledfd |= 0x01;
> + else if ((ledvalue & LED0_USB3_MASK) == 0)
> + ledfd |= 0x02;
> +
> + if (ledvalue & LED1_FD)
> + ledfd |= 0x04;
> + else if ((ledvalue & LED1_USB3_MASK) == 0)
> + ledfd |= 0x08;
> +
> + if (ledvalue & LED2_FD)
> + ledfd |= 0x10;
> + else if ((ledvalue & LED2_USB3_MASK) == 0)
> + ledfd |= 0x20;
> +
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_LEDCTRL, 1, 1, &ledfd);
> + return 0;
> +}
> +
> +static int ax88179_bind(struct usbnet *dev, struct usb_interface *intf)
> +{
> + void *buf;
> + u16 *tmp16;
> + u8 *tmp;
> + struct ax88179_data *ax179_data =
> + (struct ax88179_data *)dev->data;
> +
> + usbnet_get_endpoints(dev, intf);
> +
> + buf = kmalloc(6, GFP_KERNEL);
Same with above.
> + if (!buf) {
> + netdev_err(dev->net, "Cannot allocate memory for buffer");
> + return -ENOMEM;
> + }
> + tmp16 = (u16 *)buf;
> + tmp = (u8 *)buf;
> +
> + memset(ax179_data, 0, sizeof(*ax179_data));
> +
> + /* Power up ethernet PHY */
> + *tmp16 = 0;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
> + *tmp16 = AX_PHYPWR_RSTCTL_IPRL;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
> + msleep(200);
> +
> + *tmp = AX_CLK_SELECT_ACS | AX_CLK_SELECT_BCS;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp);
> + msleep(100);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_NODE_ID, ETH_ALEN, ETH_ALEN,
> + dev->net->dev_addr);
> + memcpy(dev->net->perm_addr, dev->net->dev_addr, ETH_ALEN);
> +
> + /* RX bulk configuration */
> + memcpy(tmp, &AX88179_BULKIN_SIZE[0], 5);
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_BULKIN_QCTRL, 5, 5, tmp);
> + dev->rx_urb_size = 1024 * 20;
> +
> + *tmp = 0x34;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PAUSE_WATERLVL_LOW, 1, 1, tmp);
> +
> + *tmp = 0x52;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_PAUSE_WATERLVL_HIGH, 1, 1, tmp);
> +
> + dev->net->hard_header_len += 12;
> + dev->net->netdev_ops = &ax88179_netdev_ops;
> + dev->net->ethtool_ops = &ax88179_ethtool_ops;
> + dev->net->needed_headroom = 8;
> +
> + /* Initialize MII structure */
> + dev->mii.dev = dev->net;
> + dev->mii.mdio_read = ax88179_mdio_read;
> + dev->mii.mdio_write = ax88179_mdio_write;
> + dev->mii.phy_id_mask = 0xff;
> + dev->mii.reg_num_mask = 0xff;
> + dev->mii.phy_id = 0x03;
> + dev->mii.supports_gmii = 1;
> +
> + dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
> + NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO;
> +
> + dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
> + NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO;
> +
> + /* Enable checksum offload */
> + *tmp = AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
> + AX_RXCOE_TCPV6 | AX_RXCOE_UDPV6;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RXCOE_CTL, 1, 1, tmp);
> +
> + *tmp = AX_TXCOE_IP | AX_TXCOE_TCP | AX_TXCOE_UDP |
> + AX_TXCOE_TCPV6 | AX_TXCOE_UDPV6;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, tmp);
> +
> + /* Configure RX control register => start operation */
> + *tmp16 = AX_RX_CTL_DROPCRCERR | AX_RX_CTL_IPE | AX_RX_CTL_START |
> + AX_RX_CTL_AP | AX_RX_CTL_AMALL | AX_RX_CTL_AB;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, 0x0b, 2, 2, tmp16);
> +
> + *tmp = AX_MONITOR_MODE_PMETYPE | AX_MONITOR_MODE_PMEPOL |
> + AX_MONITOR_MODE_RWMP;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MODE, 1, 1, tmp);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MODE, 1, 1, tmp);
> +
> + /* Configure default medium type => giga */
> + *tmp16 = AX_MEDIUM_RECEIVE_EN | AX_MEDIUM_TXFLOW_CTRLEN |
> + AX_MEDIUM_RXFLOW_CTRLEN | AX_MEDIUM_ALWAYS_ONE |
> + AX_MEDIUM_FULL_DUPLEX | AX_MEDIUM_GIGAMODE;
> +
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_MEDIUM_STATUS_MODE, 2, 2, tmp16);
> +
> + ax88179_led_setting(dev, GFP_KERNEL);
> +
> + /* Restart autoneg */
> + mii_nway_restart(&dev->mii);
> +
> + netif_carrier_off(dev->net);
> + kfree(buf);
> + return 0;
> +}
> +
> +static void ax88179_unbind(struct usbnet *dev, struct usb_interface *intf)
> +{
> + u16 tmp16;
> +
> + /* Configure RX control register => stop operation */
> + tmp16 = AX_RX_CTL_STOP;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, &tmp16);
> +
> + tmp16 = 0x0;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_CLK_SELECT, 1, 1, &tmp16);
> +
> + /* Power down ethernet PHY */
> + tmp16 = 0;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_PHYPWR_RSTCTL, 2, 2, &tmp16);
> +}
> +
> +static void
> +ax88179_rx_checksum(struct sk_buff *skb, struct ax88179_rx_pkt_header *pkt_hdr)
> +{
> + skb->ip_summed = CHECKSUM_NONE;
> +
> + /* checksum error bit is set */
> + if (pkt_hdr->l3_csum_err || pkt_hdr->l4_csum_err)
> + return;
> +
> + /* It must be a TCP or UDP packet with a valid checksum */
> + if ((pkt_hdr->l4_type == AX_RXHDR_L4_TYPE_TCP) ||
> + (pkt_hdr->l4_type == AX_RXHDR_L4_TYPE_UDP))
> + skb->ip_summed = CHECKSUM_UNNECESSARY;
> +}
> +
> +static int ax88179_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
> +{
> + struct sk_buff *ax_skb;
> + int pkt_cnt;
> + u32 rx_hdr;
> + u16 hdr_off;
> + struct ax88179_rx_pkt_header *pkt_hdr;
> +
> + skb_trim(skb, skb->len - 4);
> + memcpy(&rx_hdr, skb_tail_pointer(skb), sizeof(rx_hdr));
> + le32_to_cpus(&rx_hdr);
> +
> + pkt_cnt = (u16)rx_hdr;
> + hdr_off = (u16)(rx_hdr >> 16);
> + pkt_hdr = (struct ax88179_rx_pkt_header *)(skb->data + hdr_off);
> +
> + while (pkt_cnt--) {
> +
> + u16 pkt_len;
> +
> + le32_to_cpus((u32 *)pkt_hdr);
> + pkt_len = pkt_hdr->len;
> +
> + /* Check CRC or runt packet */
> + if (pkt_hdr->crc || pkt_hdr->drop) {
> + skb_pull(skb, (pkt_len + 7) & 0xFFF8);
> + pkt_hdr++;
> + continue;
> + }
> +
> + if (pkt_cnt == 0) {
> + /* Skip IP alignment psudo header */
> + skb_pull(skb, 2);
> +
> + skb->len = pkt_len;
> +
> + skb_set_tail_pointer(skb, pkt_len);
> +
> + skb->truesize = pkt_len + sizeof(struct sk_buff);
> +
> + ax88179_rx_checksum(skb, pkt_hdr);
> +
> + return 2;
> + }
> +
> + ax_skb = skb_clone(skb, GFP_ATOMIC);
> + if (ax_skb) {
> + ax_skb->len = pkt_len;
> + ax_skb->data = skb->data + 2;
> +
> + skb_set_tail_pointer(ax_skb, pkt_len);
> +
> + ax_skb->truesize = pkt_len + sizeof(struct sk_buff);
> +
> + ax88179_rx_checksum(ax_skb, pkt_hdr);
> +
> + usbnet_skb_return(dev, ax_skb);
> + } else {
> + return 0;
> + }
> +
> + skb_pull(skb, (pkt_len + 7) & 0xFFF8);
> + pkt_hdr++;
> + }
> + return 0;
> +}
> +
> +static struct sk_buff *
> +ax88179_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
> +{
> + u32 tx_hdr1, tx_hdr2;
> + int frame_size = dev->maxpacket;
> + int mss = skb_shinfo(skb)->gso_size;
> + int headroom;
> + int tailroom;
> +
> + tx_hdr1 = skb->len;
> + tx_hdr2 = mss;
> + if (((skb->len + 8) % frame_size) == 0) {
> + tx_hdr2 |= 0x80008000; /* Enable padding */
> + skb->len += 2;
> + }
> +
> + skb_linearize(skb);
> + headroom = skb_headroom(skb);
> + tailroom = skb_tailroom(skb);
> +
> + if (!skb_header_cloned(skb) && !skb_cloned(skb) &&
> + (headroom + tailroom) >= 8) {
> + if (headroom < 8) {
> + skb->data = memmove(skb->head + 8, skb->data, skb->len);
> + skb_set_tail_pointer(skb, skb->len);
> + }
> + } else {
> + struct sk_buff *skb2;
> + skb2 = skb_copy_expand(skb, 8, 0, flags);
> + dev_kfree_skb_any(skb);
> + skb = skb2;
> + if (!skb)
> + return NULL;
> + }
> +
> + skb_push(skb, 4);
> + cpu_to_le32s(&tx_hdr2);
> +
> + skb_copy_to_linear_data(skb, &tx_hdr2, 4);
> +
> + skb_push(skb, 4);
> + cpu_to_le32s(&tx_hdr1);
> +
> + skb_copy_to_linear_data(skb, &tx_hdr1, 4);
> +
> + return skb;
> +}
> +
> +static int ax88179_link_reset(struct usbnet *dev)
> +{
> + struct ax88179_data *ax179_data = (struct ax88179_data *)dev->data;
> + u8 *tmp, link_sts;
> + u16 mode, tmp16, delay = HZ / 10;
> + u32 tmp32 = 0x40000000;
> + unsigned long jtimeout;
> +
> + jtimeout = jiffies + delay;
> +
> + while (tmp32 & 0x40000000) {
> + mode = 0;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_RX_CTL, 2, 2, &mode);
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_RX_CTL, 2, 2, &ax179_data->rxctl);
> +
> + /*link up, check the usb device control TX FIFO full or empty*/
> + ax88179_read_cmd(dev, 0x81, 0x8c, 0, 4, &tmp32);
> +
> + if (time_after(jiffies, jtimeout))
> + return 0;
> + }
> +
> + mode = AX_MEDIUM_RECEIVE_EN | AX_MEDIUM_TXFLOW_CTRLEN |
> + AX_MEDIUM_RXFLOW_CTRLEN | AX_MEDIUM_ALWAYS_ONE;
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + PHYSICAL_LINK_STATUS, 1, 1, &link_sts);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
> + GMII_PHY_PHYSR, 2, &tmp16);
> +
> + tmp = kmalloc(5, GFP_KERNEL);
Same with above.
> + if (!tmp)
> + return -ENOMEM;
> +
> + if (!(tmp16 & GMII_PHY_PHYSR_LINK)) {
> + kfree(tmp);
> + return 0;
> + } else if (GMII_PHY_PHYSR_GIGA == (tmp16 & GMII_PHY_PHYSR_SMASK)) {
> + mode |= AX_MEDIUM_GIGAMODE;
> + if (link_sts & AX_USB_SS)
> + memcpy(tmp, &AX88179_BULKIN_SIZE[0], 5);
> + else if (link_sts & AX_USB_HS)
> + memcpy(tmp, &AX88179_BULKIN_SIZE[1], 5);
> + else
> + memcpy(tmp, &AX88179_BULKIN_SIZE[3], 5);
> + } else if (GMII_PHY_PHYSR_100 == (tmp16 & GMII_PHY_PHYSR_SMASK)) {
> + mode |= AX_MEDIUM_PS;
> + if (link_sts & (AX_USB_SS | AX_USB_HS))
> + memcpy(tmp, &AX88179_BULKIN_SIZE[2], 5);
> + else
> + memcpy(tmp, &AX88179_BULKIN_SIZE[3], 5);
> + } else {
> + memcpy(tmp, &AX88179_BULKIN_SIZE[3], 5);
> + }
> +
> + /* RX bulk configuration */
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_BULKIN_QCTRL, 5, 5, tmp);
> +
> + if (tmp16 & GMII_PHY_PHYSR_FULL)
> + mode |= AX_MEDIUM_FULL_DUPLEX;
> +
> + dev->rx_urb_size = (1024 * (*(tmp + 3)));
> +
> + mode |= 0x08;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_MEDIUM_STATUS_MODE, 2, 2, &mode);
> +
> + netif_carrier_on(dev->net);
> + kfree(tmp);
> + return 0;
> +}
> +
> +static int ax88179_reset(struct usbnet *dev)
> +{
> + void *buf;
> + u16 *tmp16;
> + u8 *tmp;
> +
> + buf = kmalloc(6, GFP_KERNEL);
> + if (!buf)
> + return -ENOMEM;
> +
> + tmp16 = (u16 *)buf;
> + tmp = (u8 *)buf;
> +
> + /* Power up ethernet PHY */
> + *tmp16 = 0;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
> + *tmp16 = AX_PHYPWR_RSTCTL_IPRL;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
> + msleep(200);
> + *tmp = AX_CLK_SELECT_ACS | AX_CLK_SELECT_BCS;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp);
> + msleep(100);
> +
> + /* Ethernet PHY Auto Detach*/
> + ax88179_auto_detach(dev, GFP_KERNEL);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_NODE_ID, ETH_ALEN,
> + ETH_ALEN, dev->net->dev_addr);
> + memcpy(dev->net->perm_addr, dev->net->dev_addr, ETH_ALEN);
> +
> + /* RX bulk configuration */
> + memcpy(tmp, &AX88179_BULKIN_SIZE[0], 5);
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_BULKIN_QCTRL, 5, 5, tmp);
> +
> + dev->rx_urb_size = 1024 * 20;
> +
> + *tmp = 0x34;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PAUSE_WATERLVL_LOW, 1, 1, tmp);
> +
> + *tmp = 0x52;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_PAUSE_WATERLVL_HIGH, 1, 1, tmp);
> +
> + dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
> + NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO;
> +
> + dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
> + NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO;
> +
> + /* Enable checksum offload */
> + *tmp = AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
> + AX_RXCOE_TCPV6 | AX_RXCOE_UDPV6;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RXCOE_CTL, 1, 1, tmp);
> +
> + *tmp = AX_TXCOE_IP | AX_TXCOE_TCP | AX_TXCOE_UDP |
> + AX_TXCOE_TCPV6 | AX_TXCOE_UDPV6;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, tmp);
> +
> + /* Configure RX control register => start operation */
> + *tmp16 = AX_RX_CTL_DROPCRCERR | AX_RX_CTL_IPE | AX_RX_CTL_START |
> + AX_RX_CTL_AP | AX_RX_CTL_AMALL | AX_RX_CTL_AB;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, 0x0b, 2, 2, tmp16);
> +
> + *tmp = AX_MONITOR_MODE_PMETYPE | AX_MONITOR_MODE_PMEPOL |
> + AX_MONITOR_MODE_RWMP;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MODE, 1, 1, tmp);
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MODE, 1, 1, tmp);
> +
> + /* Configure default medium type => giga */
> + *tmp16 = AX_MEDIUM_RECEIVE_EN | AX_MEDIUM_TXFLOW_CTRLEN |
> + AX_MEDIUM_RXFLOW_CTRLEN | AX_MEDIUM_ALWAYS_ONE |
> + AX_MEDIUM_FULL_DUPLEX | AX_MEDIUM_GIGAMODE;
> +
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_MEDIUM_STATUS_MODE, 2, 2, tmp16);
> +
> + ax88179_led_setting(dev, GFP_KERNEL);
> +
> + /* Restart autoneg */
> + mii_nway_restart(&dev->mii);
> +
> + netif_carrier_off(dev->net);
> +
> + kfree(buf);
> +
> + return 0;
> +}
> +
> +static int ax88179_stop(struct usbnet *dev)
> +{
> + u16 tmp16;
> +
> + ax88179_read_cmd(dev, AX_ACCESS_MAC,
> + AX_MEDIUM_STATUS_MODE, 2, 2, &tmp16);
> + tmp16 &= ~AX_MEDIUM_RECEIVE_EN;
> + ax88179_write_cmd(dev, AX_ACCESS_MAC,
> + AX_MEDIUM_STATUS_MODE, 2, 2, &tmp16);
> +
> + return 0;
> +}
> +
> +static const struct driver_info ax88179_info = {
> + .description = "ASIX AX88179 USB 3.0 Gigibit Ethernet",
> + .bind = ax88179_bind,
> + .unbind = ax88179_unbind,
> + .status = ax88179_status,
> + .link_reset = ax88179_link_reset,
> + .reset = ax88179_reset,
> + .stop = ax88179_stop,
> + .flags = FLAG_ETHER | FLAG_FRAMING_AX,
> + .rx_fixup = ax88179_rx_fixup,
> + .tx_fixup = ax88179_tx_fixup,
> +};
> +
> +static const struct driver_info ax88178a_info = {
> + .description = "ASIX AX88178A USB 2.0 Gigibit Ethernet",
> + .bind = ax88179_bind,
> + .unbind = ax88179_unbind,
> + .status = ax88179_status,
> + .link_reset = ax88179_link_reset,
> + .reset = ax88179_reset,
> + .stop = ax88179_stop,
> + .flags = FLAG_ETHER | FLAG_FRAMING_AX,
> + .rx_fixup = ax88179_rx_fixup,
> + .tx_fixup = ax88179_tx_fixup,
> +};
> +
> +static const struct driver_info sitecom_info = {
> + .description = "Sitecom USB 3.0 to Gigabit Adapter",
> + .bind = ax88179_bind,
> + .unbind = ax88179_unbind,
> + .status = ax88179_status,
> + .link_reset = ax88179_link_reset,
> + .reset = ax88179_reset,
> + .stop = ax88179_stop,
> + .flags = FLAG_ETHER | FLAG_FRAMING_AX,
> + .rx_fixup = ax88179_rx_fixup,
> + .tx_fixup = ax88179_tx_fixup,
> +};
> +
> +static const struct usb_device_id products[] = {
> +{
> + /* ASIX AX88179 10/100/1000 */
> + USB_DEVICE(0x0b95, 0x1790),
> + .driver_info = (unsigned long)&ax88179_info,
> +}, {
> + /* ASIX AX88178A 10/100/1000 */
> + USB_DEVICE(0x0b95, 0x178a),
> + .driver_info = (unsigned long)&ax88178a_info,
> +}, {
> + /* Sitecom USB 3.0 to Gigabit Adapter */
> + USB_DEVICE(0x0df6, 0x0072),
> + .driver_info = (unsigned long) &sitecom_info,
> +},
> + { },
> +};
> +MODULE_DEVICE_TABLE(usb, products);
> +
> +static struct usb_driver asix_driver = {
> + .name = "ax88179_178a",
> + .id_table = products,
> + .probe = usbnet_probe,
> + .suspend = ax88179_suspend,
> + .resume = ax88179_resume,
> + .disconnect = usbnet_disconnect,
> +};
> +
> +static int __init asix_init(void)
> +{
> + return usb_register(&asix_driver);
> +}
> +module_init(asix_init);
> +
> +static void __exit asix_exit(void)
> +{
> + usb_deregister(&asix_driver);
> +}
> +module_exit(asix_exit);
> +
> +MODULE_DESCRIPTION("ASIX AX88179/178A based USB 3.0/2.0 Gigabit Ethernet Devices");
> +MODULE_LICENSE("GPL");
Thanks,
--
Ming Lei
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