ASIX AX88796[1] is a versatile ethernet adapter chip, that can be connected to a CPU with a 8/16-bit bus or with an SPI. This driver supports SPI connection. The driver has been ported from the vendor kernel for ARTIK5[2] boards. Several changes were made to adapt it to the current kernel which include: + updated DT configuration, + clock configuration moved to DT, + new timer, ethtool and gpio APIs, + dev_* instead of pr_* and custom printk() wrappers, + removed awkward vendor power managemtn. [1] https://www.asix.com.tw/products.php?op=pItemdetail&PItemID=104;65;86&PLine=65 [2] https://git.tizen.org/cgit/profile/common/platform/kernel/linux-3.10-artik/ The other ax88796 driver is for NE2000 compatible AX88796L chip. These chips are not compatible. Hence, two separate drivers are required. Signed-off-by: Łukasz Stelmach <l.stelmach@xxxxxxxxxxx> --- MAINTAINERS | 6 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/asix/Kconfig | 21 + drivers/net/ethernet/asix/Makefile | 6 + drivers/net/ethernet/asix/ax88796c_ioctl.c | 241 +++++ drivers/net/ethernet/asix/ax88796c_ioctl.h | 27 + drivers/net/ethernet/asix/ax88796c_main.c | 1041 ++++++++++++++++++++ drivers/net/ethernet/asix/ax88796c_main.h | 568 +++++++++++ drivers/net/ethernet/asix/ax88796c_spi.c | 111 +++ drivers/net/ethernet/asix/ax88796c_spi.h | 69 ++ 11 files changed, 2092 insertions(+) create mode 100644 drivers/net/ethernet/asix/Kconfig create mode 100644 drivers/net/ethernet/asix/Makefile create mode 100644 drivers/net/ethernet/asix/ax88796c_ioctl.c create mode 100644 drivers/net/ethernet/asix/ax88796c_ioctl.h create mode 100644 drivers/net/ethernet/asix/ax88796c_main.c create mode 100644 drivers/net/ethernet/asix/ax88796c_main.h create mode 100644 drivers/net/ethernet/asix/ax88796c_spi.c create mode 100644 drivers/net/ethernet/asix/ax88796c_spi.h diff --git a/MAINTAINERS b/MAINTAINERS index deaafb617361..654eb0127479 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2822,6 +2822,12 @@ S: Maintained F: Documentation/hwmon/asc7621.rst F: drivers/hwmon/asc7621.c +ASIX AX88796C SPI ETHERNET ADAPTER +M: Łukasz Stelmach <l.stelmach@xxxxxxxxxxx> +S: Maintained +F: Documentation/devicetree/bindings/net/asix,ax99706c-spi.yaml +F: drivers/net/ethernet/asix/ax88796c_* + ASPEED PINCTRL DRIVERS M: Andrew Jeffery <andrew@xxxxxxxx> L: linux-aspeed@xxxxxxxxxxxxxxxx (moderated for non-subscribers) diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index de50e8b9e656..f3b218e45ea5 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -32,6 +32,7 @@ source "drivers/net/ethernet/apm/Kconfig" source "drivers/net/ethernet/apple/Kconfig" source "drivers/net/ethernet/aquantia/Kconfig" source "drivers/net/ethernet/arc/Kconfig" +source "drivers/net/ethernet/asix/Kconfig" source "drivers/net/ethernet/atheros/Kconfig" source "drivers/net/ethernet/aurora/Kconfig" source "drivers/net/ethernet/broadcom/Kconfig" diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index f8f38dcb5f8a..9eb368d93607 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_NET_XGENE) += apm/ obj-$(CONFIG_NET_VENDOR_APPLE) += apple/ obj-$(CONFIG_NET_VENDOR_AQUANTIA) += aquantia/ obj-$(CONFIG_NET_VENDOR_ARC) += arc/ +obj-$(CONFIG_NET_VENDOR_ASIX) += asix/ obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/ obj-$(CONFIG_NET_VENDOR_AURORA) += aurora/ obj-$(CONFIG_NET_VENDOR_CADENCE) += cadence/ diff --git a/drivers/net/ethernet/asix/Kconfig b/drivers/net/ethernet/asix/Kconfig new file mode 100644 index 000000000000..7caa45607450 --- /dev/null +++ b/drivers/net/ethernet/asix/Kconfig @@ -0,0 +1,21 @@ +# +# Asix network device configuration +# + +config NET_VENDOR_ASIX + bool "Asix devices" + default y + help + If you have a network (Ethernet, non-USB, not NE2000 compatible) + interface based on a chip from ASIX, say Y. + +if NET_VENDOR_ASIX + +config SPI_AX88796C + tristate "Asix AX88796C-SPI support" + depends on SPI + depends on GPIOLIB + help + Say Y here if you intend to use ASIX AX88796C attached in SPI mode. + +endif # NET_VENDOR_ASIX diff --git a/drivers/net/ethernet/asix/Makefile b/drivers/net/ethernet/asix/Makefile new file mode 100644 index 000000000000..0bfbbb042634 --- /dev/null +++ b/drivers/net/ethernet/asix/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for the Asix network device drivers. +# + +obj-$(CONFIG_SPI_AX88796C) += ax88796c.o +ax88796c-y := ax88796c_main.o ax88796c_ioctl.o ax88796c_spi.o diff --git a/drivers/net/ethernet/asix/ax88796c_ioctl.c b/drivers/net/ethernet/asix/ax88796c_ioctl.c new file mode 100644 index 000000000000..b3e3ac96790d --- /dev/null +++ b/drivers/net/ethernet/asix/ax88796c_ioctl.c @@ -0,0 +1,241 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2010 ASIX Electronics Corporation + * Copyright (c) 2020 Samsung Electronics Co., Ltd. + * + * ASIX AX88796C SPI Fast Ethernet Linux driver + */ + +#define pr_fmt(fmt) "ax88796c: " fmt + +#include <linux/bitmap.h> +#include <linux/iopoll.h> +#include <linux/phy.h> +#include <linux/netdevice.h> + +#include "ax88796c_main.h" +#include "ax88796c_ioctl.h" + +static void ax88796c_get_drvinfo(struct net_device *ndev, + struct ethtool_drvinfo *info) +{ + /* Inherit standard device info */ + strncpy(info->driver, DRV_NAME, sizeof(info->driver)); +} + +static u32 ax88796c_get_link(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + mutex_lock(&ax_local->spi_lock); + + phy_read_status(ndev->phydev); + + mutex_unlock(&ax_local->spi_lock); + + return ndev->phydev->link; +} + +static u32 ax88796c_get_msglevel(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + return ax_local->msg_enable; +} + +static void ax88796c_set_msglevel(struct net_device *ndev, u32 level) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + ax_local->msg_enable = level; +} + +static int +ax88796c_get_link_ksettings(struct net_device *ndev, + struct ethtool_link_ksettings *cmd) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + int ret; + + mutex_lock(&ax_local->spi_lock); + + ret = phy_ethtool_get_link_ksettings(ndev, cmd); + + mutex_unlock(&ax_local->spi_lock); + + return ret; +} + +static int +ax88796c_set_link_ksettings(struct net_device *ndev, + const struct ethtool_link_ksettings *cmd) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + int ret; + + mutex_lock(&ax_local->spi_lock); + + ret = phy_ethtool_set_link_ksettings(ndev, cmd); + + mutex_unlock(&ax_local->spi_lock); + + return ret; +} + +static int ax88796c_nway_reset(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + int ret; + + mutex_lock(&ax_local->spi_lock); + + ret = phy_ethtool_nway_reset(ndev); + + mutex_unlock(&ax_local->spi_lock); + + return ret; +} + +static u32 ax88796c_ethtool_getmsglevel(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + return ax_local->msg_enable; +} + +static void ax88796c_ethtool_setmsglevel(struct net_device *ndev, u32 level) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + ax_local->msg_enable = level; +} + +static int ax88796c_get_regs_len(struct net_device *ndev) +{ + return AX88796C_REGDUMP_LEN + AX88796C_PHY_REGDUMP_LEN; +} + +static void +ax88796c_get_regs(struct net_device *ndev, struct ethtool_regs *regs, void *_p) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + u16 *p = _p; + int offset, i; + + memset(p, 0, AX88796C_REGDUMP_LEN); + + for (offset = 0; offset < AX88796C_REGDUMP_LEN; offset += 2) { + if (!test_bit(offset / 2, ax88796c_no_regs_mask)) + *p = AX_READ(&ax_local->ax_spi, offset); + p++; + } + + for (i = 0; i < AX88796C_PHY_REGDUMP_LEN / 2; i++) { + *p = phy_read(ax_local->phydev, i); + p++; + } +} + +int ax88796c_mdio_read(struct mii_bus *mdiobus, int phy_id, int loc) +{ + struct ax88796c_device *ax_local = mdiobus->priv; + int ret; + + AX_WRITE(&ax_local->ax_spi, MDIOCR_RADDR(loc) + | MDIOCR_FADDR(phy_id) | MDIOCR_READ, P2_MDIOCR); + + ret = read_poll_timeout(AX_READ, ret, + (ret != 0), + 0, jiffies_to_usecs(HZ / 100), false, + &ax_local->ax_spi, P2_MDIOCR); + if (ret) + return -EBUSY; + + return AX_READ(&ax_local->ax_spi, P2_MDIODR); +} + +int +ax88796c_mdio_write(struct mii_bus *mdiobus, int phy_id, int loc, u16 val) +{ + struct ax88796c_device *ax_local = mdiobus->priv; + int ret; + + AX_WRITE(&ax_local->ax_spi, val, P2_MDIODR); + + AX_WRITE(&ax_local->ax_spi, + MDIOCR_RADDR(loc) | MDIOCR_FADDR(phy_id) + | MDIOCR_WRITE, P2_MDIOCR); + + ret = read_poll_timeout(AX_READ, ret, + ((ret & MDIOCR_VALID) != 0), 0, + jiffies_to_usecs(HZ / 100), false, + &ax_local->ax_spi, P2_MDIOCR); + if (ret) + return -EIO; + + if (loc == MII_ADVERTISE) { + AX_WRITE(&ax_local->ax_spi, (BMCR_FULLDPLX | BMCR_ANRESTART | + BMCR_ANENABLE | BMCR_SPEED100), P2_MDIODR); + AX_WRITE(&ax_local->ax_spi, (MDIOCR_RADDR(MII_BMCR) | + MDIOCR_FADDR(phy_id) | MDIOCR_WRITE), + P2_MDIOCR); + + ret = read_poll_timeout(AX_READ, ret, + ((ret & MDIOCR_VALID) != 0), 0, + jiffies_to_usecs(HZ / 100), false, + &ax_local->ax_spi, P2_MDIOCR); + if (ret) + return -EIO; + } + + return 0; +} + +void ax88796c_set_csums(struct ax88796c_device *ax_local) +{ + struct net_device *ndev = ax_local->ndev; + + if (ndev->features & NETIF_F_RXCSUM) { + AX_WRITE(&ax_local->ax_spi, COERCR0_DEFAULT, P4_COERCR0); + AX_WRITE(&ax_local->ax_spi, COERCR1_DEFAULT, P4_COERCR1); + } else { + AX_WRITE(&ax_local->ax_spi, 0, P4_COERCR0); + AX_WRITE(&ax_local->ax_spi, 0, P4_COERCR1); + } + + if (ndev->features & NETIF_F_HW_CSUM) { + AX_WRITE(&ax_local->ax_spi, COETCR0_DEFAULT, P4_COETCR0); + AX_WRITE(&ax_local->ax_spi, COETCR1_TXPPPE, P4_COETCR1); + } else { + AX_WRITE(&ax_local->ax_spi, 0, P4_COETCR0); + AX_WRITE(&ax_local->ax_spi, 0, P4_COETCR1); + } +} + +const struct ethtool_ops ax88796c_ethtool_ops = { + .get_drvinfo = ax88796c_get_drvinfo, + .get_link = ax88796c_get_link, + .get_msglevel = ax88796c_get_msglevel, + .set_msglevel = ax88796c_set_msglevel, + .get_link_ksettings = ax88796c_get_link_ksettings, + .set_link_ksettings = ax88796c_set_link_ksettings, + .nway_reset = ax88796c_nway_reset, + .get_msglevel = ax88796c_ethtool_getmsglevel, + .set_msglevel = ax88796c_ethtool_setmsglevel, + .get_regs_len = ax88796c_get_regs_len, + .get_regs = ax88796c_get_regs, +}; + +int ax88796c_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + int ret; + + mutex_lock(&ax_local->spi_lock); + + ret = phy_mii_ioctl(ndev->phydev, ifr, cmd); + + mutex_unlock(&ax_local->spi_lock); + + return ret; +} diff --git a/drivers/net/ethernet/asix/ax88796c_ioctl.h b/drivers/net/ethernet/asix/ax88796c_ioctl.h new file mode 100644 index 000000000000..d478981bf995 --- /dev/null +++ b/drivers/net/ethernet/asix/ax88796c_ioctl.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2010 ASIX Electronics Corporation + * Copyright (c) 2020 Samsung Electronics Co., Ltd. + * + * ASIX AX88796C SPI Fast Ethernet Linux driver + */ + +#ifndef _AX88796C_IOCTL_H +#define _AX88796C_IOCTL_H + +#include <linux/ethtool.h> +#include <linux/netdevice.h> + +#include "ax88796c_main.h" + +extern const struct ethtool_ops ax88796c_ethtool_ops; + +bool ax88796c_check_power(const struct ax88796c_device *ax_local); +bool ax88796c_check_power_and_wake(struct ax88796c_device *ax_local); +void ax88796c_set_power_saving(struct ax88796c_device *ax_local, u8 ps_level); +int ax88796c_mdio_read(struct mii_bus *mdiobus, int phy_id, int loc); +int ax88796c_mdio_write(struct mii_bus *mdiobus, int phy_id, int loc, u16 val); +void ax88796c_set_csums(struct ax88796c_device *ax_local); +int ax88796c_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); + +#endif diff --git a/drivers/net/ethernet/asix/ax88796c_main.c b/drivers/net/ethernet/asix/ax88796c_main.c new file mode 100644 index 000000000000..2148ea01362a --- /dev/null +++ b/drivers/net/ethernet/asix/ax88796c_main.c @@ -0,0 +1,1041 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2010 ASIX Electronics Corporation + * Copyright (c) 2020 Samsung Electronics Co., Ltd. + * + * ASIX AX88796C SPI Fast Ethernet Linux driver + */ + +#define pr_fmt(fmt) "ax88796c: " fmt + +#include "ax88796c_main.h" +#include "ax88796c_ioctl.h" + +#include <linux/bitmap.h> +#include <linux/etherdevice.h> +#include <linux/iopoll.h> +#include <linux/mdio.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/of.h> +#include <linux/phy.h> +#include <linux/spi/spi.h> + +static int comp; +static int msg_enable = NETIF_MSG_PROBE | + NETIF_MSG_LINK | + /* NETIF_MSG_TIMER | */ + /* NETIF_MSG_IFDOWN | */ + /* NETIF_MSG_IFUP | */ + NETIF_MSG_RX_ERR | + NETIF_MSG_TX_ERR | + /* NETIF_MSG_TX_QUEUED | */ + /* NETIF_MSG_INTR | */ + /* NETIF_MSG_TX_DONE | */ + /* NETIF_MSG_RX_STATUS | */ + /* NETIF_MSG_PKTDATA | */ + /* NETIF_MSG_HW | */ + /* NETIF_MSG_WOL | */ + 0; + +static char *no_regs_list = "80018001,e1918001,8001a001,fc0d0000"; +unsigned long ax88796c_no_regs_mask[AX88796C_REGDUMP_LEN / (sizeof(unsigned long) * 8)]; + +module_param(comp, int, 0444); +MODULE_PARM_DESC(comp, "0=Non-Compression Mode, 1=Compression Mode"); + +module_param(msg_enable, int, 0444); +MODULE_PARM_DESC(msg_enable, "Message mask (see linux/netdevice.h for bitmap)"); + +static int ax88796c_soft_reset(struct ax88796c_device *ax_local) +{ + u16 temp; + int ret; + + AX_WRITE(&ax_local->ax_spi, PSR_RESET, P0_PSR); + AX_WRITE(&ax_local->ax_spi, PSR_RESET_CLR, P0_PSR); + + ret = read_poll_timeout(AX_READ, ret, + (ret & PSR_DEV_READY), + 0, jiffies_to_usecs(160 * HZ / 1000), false, + &ax_local->ax_spi, P0_PSR); + if (ret) + return -1; + + temp = AX_READ(&ax_local->ax_spi, P4_SPICR); + if (ax_local->capabilities & AX_CAP_COMP) { + AX_WRITE(&ax_local->ax_spi, + (temp | SPICR_RCEN | SPICR_QCEN), P4_SPICR); + ax_local->ax_spi.comp = 1; + } else { + AX_WRITE(&ax_local->ax_spi, + (temp & ~(SPICR_RCEN | SPICR_QCEN)), P4_SPICR); + ax_local->ax_spi.comp = 0; + } + + return 0; +} + +static int ax88796c_reload_eeprom(struct ax88796c_device *ax_local) +{ + int ret; + + AX_WRITE(&ax_local->ax_spi, EECR_RELOAD, P3_EECR); + + ret = read_poll_timeout(AX_READ, ret, + (ret & PSR_DEV_READY), + 0, jiffies_to_usecs(2 * HZ / 1000), false, + &ax_local->ax_spi, P0_PSR); + if (ret) { + dev_err(&ax_local->spi->dev, + "timeout waiting for reload eeprom\n"); + return -1; + } + + return 0; +} + +static void ax88796c_set_hw_multicast(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + u16 rx_ctl = RXCR_AB; + int mc_count = netdev_mc_count(ndev); + + memset(ax_local->multi_filter, 0, AX_MCAST_FILTER_SIZE); + + if (ndev->flags & IFF_PROMISC) { + rx_ctl |= RXCR_PRO; + + } else if (ndev->flags & IFF_ALLMULTI || mc_count > AX_MAX_MCAST) { + rx_ctl |= RXCR_AMALL; + + } else if (mc_count == 0) { + /* just broadcast and directed */ + } else { + u32 crc_bits; + int i; + struct netdev_hw_addr *ha; + + netdev_for_each_mc_addr(ha, ndev) { + crc_bits = ether_crc(ETH_ALEN, ha->addr); + ax_local->multi_filter[crc_bits >> 29] |= + (1 << ((crc_bits >> 26) & 7)); + } + + for (i = 0; i < 4; i++) { + AX_WRITE(&ax_local->ax_spi, + ((ax_local->multi_filter[i * 2 + 1] << 8) | + ax_local->multi_filter[i * 2]), P3_MFAR(i)); + } + } + + AX_WRITE(&ax_local->ax_spi, rx_ctl, P2_RXCR); +} + +static void ax88796c_set_mac_addr(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + AX_WRITE(&ax_local->ax_spi, ((u16)(ndev->dev_addr[4] << 8) | + (u16)ndev->dev_addr[5]), P3_MACASR0); + AX_WRITE(&ax_local->ax_spi, ((u16)(ndev->dev_addr[2] << 8) | + (u16)ndev->dev_addr[3]), P3_MACASR1); + AX_WRITE(&ax_local->ax_spi, ((u16)(ndev->dev_addr[0] << 8) | + (u16)ndev->dev_addr[1]), P3_MACASR2); +} + +static int ax88796c_set_mac_address(struct net_device *ndev, void *p) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + struct sockaddr *addr = p; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len); + + mutex_lock(&ax_local->spi_lock); + + ax88796c_set_mac_addr(ndev); + + mutex_unlock(&ax_local->spi_lock); + + return 0; +} + +static void ax88796c_load_mac_addr(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + u16 temp; + + /* Try the device tree first */ + if (!eth_platform_get_mac_address(&ax_local->spi->dev, ndev->dev_addr) && + is_valid_ether_addr(ndev->dev_addr)) { + if (netif_msg_probe(ax_local)) + dev_info(&ax_local->spi->dev, + "MAC address read from device tree\n"); + return; + } + + /* Read the MAC address from AX88796C */ + temp = AX_READ(&ax_local->ax_spi, P3_MACASR0); + ndev->dev_addr[5] = (u8)temp; + ndev->dev_addr[4] = (u8)(temp >> 8); + + temp = AX_READ(&ax_local->ax_spi, P3_MACASR1); + ndev->dev_addr[3] = (u8)temp; + ndev->dev_addr[2] = (u8)(temp >> 8); + + temp = AX_READ(&ax_local->ax_spi, P3_MACASR2); + ndev->dev_addr[1] = (u8)temp; + ndev->dev_addr[0] = (u8)(temp >> 8); + + if (is_valid_ether_addr(ndev->dev_addr)) { + if (netif_msg_probe(ax_local)) + dev_info(&ax_local->spi->dev, + "MAC address read from ASIX chip\n"); + return; + } + + /* Use random address if none found */ + if (netif_msg_probe(ax_local)) + dev_info(&ax_local->spi->dev, "Use random MAC address\n"); + eth_hw_addr_random(ndev); +} + +static void ax88796c_proc_tx_hdr(struct tx_pkt_info *info, u8 ip_summed) +{ + u16 pkt_len_bar = (~info->pkt_len & TX_HDR_SOP_PKTLENBAR); + + /* Prepare SOP header */ + info->sop.flags_len = info->pkt_len | + ((ip_summed == CHECKSUM_NONE) || + (ip_summed == CHECKSUM_UNNECESSARY) ? TX_HDR_SOP_DICF : 0); + + info->sop.seq_lenbar = ((info->seq_num << 11) & TX_HDR_SOP_SEQNUM) + | pkt_len_bar; + cpu_to_be16s(&info->sop.flags_len); + cpu_to_be16s(&info->sop.seq_lenbar); + + /* Prepare Segment header */ + info->seg.flags_seqnum_seglen = TX_HDR_SEG_FS | TX_HDR_SEG_LS + | info->pkt_len; + + info->seg.eo_so_seglenbar = pkt_len_bar; + + cpu_to_be16s(&info->seg.flags_seqnum_seglen); + cpu_to_be16s(&info->seg.eo_so_seglenbar); + + /* Prepare EOP header */ + info->eop.seq_len = ((info->seq_num << 11) & + TX_HDR_EOP_SEQNUM) | info->pkt_len; + info->eop.seqbar_lenbar = ((~info->seq_num << 11) & + TX_HDR_EOP_SEQNUMBAR) | pkt_len_bar; + + cpu_to_be16s(&info->eop.seq_len); + cpu_to_be16s(&info->eop.seqbar_lenbar); +} + +static int +ax88796c_check_free_pages(struct ax88796c_device *ax_local, u8 need_pages) +{ + u8 free_pages; + u16 tmp; + + free_pages = AX_READ(&ax_local->ax_spi, P0_TFBFCR) & TX_FREEBUF_MASK; + if (free_pages < need_pages) { + /* schedule free page interrupt */ + tmp = AX_READ(&ax_local->ax_spi, P0_TFBFCR) + & TFBFCR_SCHE_FREE_PAGE; + AX_WRITE(&ax_local->ax_spi, tmp | TFBFCR_TX_PAGE_SET | + TFBFCR_SET_FREE_PAGE(need_pages), + P0_TFBFCR); + return -ENOMEM; + } + + return 0; +} + +static struct sk_buff * +ax88796c_tx_fixup(struct net_device *ndev, struct sk_buff_head *q) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + struct sk_buff *skb, *tx_skb; + struct tx_pkt_info *info; + struct skb_data *entry; + int headroom; + int tailroom; + u8 need_pages; + u16 tol_len, pkt_len; + u8 padlen, seq_num; + u8 spi_len = ax_local->ax_spi.comp ? 1 : 4; + + if (skb_queue_empty(q)) + return NULL; + + skb = skb_peek(q); + pkt_len = skb->len; + need_pages = (pkt_len + TX_OVERHEAD + 127) >> 7; + if (ax88796c_check_free_pages(ax_local, need_pages) != 0) + return NULL; + + headroom = skb_headroom(skb); + tailroom = skb_tailroom(skb); + padlen = ((pkt_len + 3) & 0x7FC) - pkt_len; + tol_len = ((pkt_len + 3) & 0x7FC) + + TX_OVERHEAD + TX_EOP_SIZE + spi_len; + seq_num = ++ax_local->seq_num & 0x1F; + + info = (struct tx_pkt_info *)skb->cb; + info->pkt_len = pkt_len; + + if ((!skb_cloned(skb)) && + (headroom >= (TX_OVERHEAD + spi_len)) && + (tailroom >= (padlen + TX_EOP_SIZE))) { + info->seq_num = seq_num; + ax88796c_proc_tx_hdr(info, skb->ip_summed); + + /* SOP and SEG header */ + memcpy(skb_push(skb, TX_OVERHEAD), &info->sop, TX_OVERHEAD); + + /* Write SPI TXQ header */ + memcpy(skb_push(skb, spi_len), tx_cmd_buf, spi_len); + + /* Make 32-bit alignment */ + skb_put(skb, padlen); + + /* EOP header */ + memcpy(skb_put(skb, TX_EOP_SIZE), &info->eop, TX_EOP_SIZE); + + tx_skb = skb; + skb_unlink(skb, q); + } else { + tx_skb = alloc_skb(tol_len, GFP_KERNEL); + if (!tx_skb) + return NULL; + + /* Write SPI TXQ header */ + memcpy(skb_put(tx_skb, spi_len), tx_cmd_buf, spi_len); + + info->seq_num = seq_num; + ax88796c_proc_tx_hdr(info, skb->ip_summed); + + /* SOP and SEG header */ + memcpy(skb_put(tx_skb, TX_OVERHEAD), + &info->sop, TX_OVERHEAD); + + /* Packet */ + memcpy(skb_put(tx_skb, ((pkt_len + 3) & 0xFFFC)), + skb->data, pkt_len); + + /* EOP header */ + memcpy(skb_put(tx_skb, TX_EOP_SIZE), + &info->eop, TX_EOP_SIZE); + + skb_unlink(skb, q); + dev_kfree_skb(skb); + } + + entry = (struct skb_data *)tx_skb->cb; + memset(entry, 0, sizeof(*entry)); + entry->len = pkt_len; + + if (netif_msg_pktdata(ax_local)) { + char pfx[IFNAMSIZ + 7]; + + snprintf(pfx, sizeof(pfx), "%s: ", ndev->name); + + netdev_info(ndev, "TX packet len %d, total len %d, seq %d\n", + pkt_len, tx_skb->len, seq_num); + + netdev_info(ndev, " SPI Header:\n"); + print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1, + tx_skb->data, 4, 0); + + netdev_info(ndev, " TX SOP:\n"); + print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1, + tx_skb->data + 4, TX_OVERHEAD, 0); + + netdev_info(ndev, " TX packet:\n"); + print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1, + tx_skb->data + 4 + TX_OVERHEAD, + tx_skb->len - TX_EOP_SIZE - 4 - TX_OVERHEAD, 0); + + netdev_info(ndev, " TX EOP:\n"); + print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1, + tx_skb->data + tx_skb->len - 4, 4, 0); + } + + return tx_skb; +} + +static int ax88796c_hard_xmit(struct ax88796c_device *ax_local) +{ + struct sk_buff *tx_skb; + struct skb_data *entry; + + tx_skb = ax88796c_tx_fixup(ax_local->ndev, &ax_local->tx_wait_q); + + if (!tx_skb) + return 0; + + entry = (struct skb_data *)tx_skb->cb; + + AX_WRITE(&ax_local->ax_spi, + (TSNR_TXB_START | TSNR_PKT_CNT(1)), P0_TSNR); + + axspi_write_txq(&ax_local->ax_spi, tx_skb->data, tx_skb->len); + + if (((AX_READ(&ax_local->ax_spi, P0_TSNR) & TXNR_TXB_IDLE) == 0) || + ((ISR_TXERR & AX_READ(&ax_local->ax_spi, P0_ISR)) != 0)) { + /* Ack tx error int */ + AX_WRITE(&ax_local->ax_spi, ISR_TXERR, P0_ISR); + + ax_local->stats.tx_dropped++; + + netif_err(ax_local, tx_err, ax_local->ndev, + "TX FIFO error, re-initialize the TX bridge\n"); + + /* Reinitial tx bridge */ + AX_WRITE(&ax_local->ax_spi, TXNR_TXB_REINIT | + AX_READ(&ax_local->ax_spi, P0_TSNR), P0_TSNR); + ax_local->seq_num = 0; + } else { + ax_local->stats.tx_packets++; + ax_local->stats.tx_bytes += entry->len; + } + + entry->state = tx_done; + dev_kfree_skb(tx_skb); + + return 1; +} + +static int +ax88796c_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + skb_queue_tail(&ax_local->tx_wait_q, skb); + if (skb_queue_len(&ax_local->tx_wait_q) > TX_QUEUE_HIGH_WATER) { + netif_err(ax_local, tx_queued, ndev, + "Too much TX packets in queue %d\n", + skb_queue_len(&ax_local->tx_wait_q)); + + netif_stop_queue(ndev); + } + + set_bit(EVENT_TX, &ax_local->flags); + queue_work(ax_local->ax_work_queue, &ax_local->ax_work); + + return NETDEV_TX_OK; +} + +static void +ax88796c_skb_return(struct ax88796c_device *ax_local, struct sk_buff *skb, + struct rx_header *rxhdr) +{ + struct net_device *ndev = ax_local->ndev; + int status; + + do { + if (!(ndev->features & NETIF_F_RXCSUM)) + break; + + /* checksum error bit is set */ + if ((rxhdr->flags & RX_HDR3_L3_ERR) || + (rxhdr->flags & RX_HDR3_L4_ERR)) + break; + + /* Other types may be indicated by more than one bit. */ + if ((rxhdr->flags & RX_HDR3_L4_TYPE_TCP) || + (rxhdr->flags & RX_HDR3_L4_TYPE_UDP)) + skb->ip_summed = CHECKSUM_UNNECESSARY; + } while (0); + + ax_local->stats.rx_packets++; + ax_local->stats.rx_bytes += skb->len; + skb->dev = ndev; + + skb->truesize = skb->len + sizeof(struct sk_buff); + skb->protocol = eth_type_trans(skb, ax_local->ndev); + + netif_info(ax_local, rx_status, ndev, "< rx, len %zu, type 0x%x\n", + skb->len + sizeof(struct ethhdr), skb->protocol); + + status = netif_rx(skb); + if (status != NET_RX_SUCCESS) + netif_info(ax_local, rx_err, ndev, + "netif_rx status %d\n", status); +} + +static void +ax88796c_rx_fixup(struct ax88796c_device *ax_local, struct sk_buff *rx_skb) +{ + struct rx_header *rxhdr = (struct rx_header *)rx_skb->data; + struct net_device *ndev = ax_local->ndev; + u16 len; + + be16_to_cpus(&rxhdr->flags_len); + be16_to_cpus(&rxhdr->seq_lenbar); + be16_to_cpus(&rxhdr->flags); + + if ((((short)rxhdr->flags_len) & RX_HDR1_PKT_LEN) != + (~((short)rxhdr->seq_lenbar) & 0x7FF)) { + netif_err(ax_local, rx_err, ndev, "Header error\n"); + + ax_local->stats.rx_frame_errors++; + kfree_skb(rx_skb); + return; + } + + if ((rxhdr->flags_len & RX_HDR1_MII_ERR) || + (rxhdr->flags_len & RX_HDR1_CRC_ERR)) { + netif_err(ax_local, rx_err, ndev, "CRC or MII error\n"); + + ax_local->stats.rx_crc_errors++; + kfree_skb(rx_skb); + return; + } + + len = rxhdr->flags_len & RX_HDR1_PKT_LEN; + if (netif_msg_pktdata(ax_local)) { + char pfx[IFNAMSIZ + 7]; + + snprintf(pfx, sizeof(pfx), "%s: ", ndev->name); + netdev_info(ndev, "RX data, total len %d, packet len %d\n", + rx_skb->len, len); + + netdev_info(ndev, " Dump RX packet header:"); + print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1, + rx_skb->data, sizeof(*rxhdr), 0); + + netdev_info(ndev, " Dump RX packet:"); + print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1, + rx_skb->data + sizeof(*rxhdr), len, 0); + } + + skb_pull(rx_skb, sizeof(*rxhdr)); + __pskb_trim(rx_skb, len); + + return ax88796c_skb_return(ax_local, rx_skb, rxhdr); +} + +static int ax88796c_receive(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + struct sk_buff *skb; + struct skb_data *entry; + u16 w_count, pkt_len; + u8 pkt_cnt; + + /* check rx packet and total word count */ + AX_WRITE(&ax_local->ax_spi, AX_READ(&ax_local->ax_spi, P0_RTWCR) + | RTWCR_RX_LATCH, P0_RTWCR); + + pkt_cnt = AX_READ(&ax_local->ax_spi, P0_RXBCR2) & RXBCR2_PKT_MASK; + if (!pkt_cnt) + return 0; + + pkt_len = AX_READ(&ax_local->ax_spi, P0_RCPHR) & 0x7FF; + + w_count = ((pkt_len + 6 + 3) & 0xFFFC) >> 1; + + skb = alloc_skb((w_count * 2), GFP_KERNEL); + if (!skb) { + AX_WRITE(&ax_local->ax_spi, RXBCR1_RXB_DISCARD, P0_RXBCR1); + return 0; + } + entry = (struct skb_data *)skb->cb; + + AX_WRITE(&ax_local->ax_spi, RXBCR1_RXB_START | w_count, P0_RXBCR1); + + axspi_read_rxq(&ax_local->ax_spi, + skb_put(skb, w_count * 2), skb->len); + + /* Check if rx bridge is idle */ + if ((AX_READ(&ax_local->ax_spi, P0_RXBCR2) & RXBCR2_RXB_IDLE) == 0) { + netif_err(ax_local, rx_err, ndev, + "Rx Bridge is not idle\n"); + AX_WRITE(&ax_local->ax_spi, RXBCR2_RXB_REINIT, P0_RXBCR2); + + entry->state = rx_err; + } else { + entry->state = rx_done; + } + + AX_WRITE(&ax_local->ax_spi, ISR_RXPKT, P0_ISR); + + ax88796c_rx_fixup(ax_local, skb); + + return 1; +} + +static int ax88796c_process_isr(struct ax88796c_device *ax_local) +{ + u16 isr; + u8 done = 0; + struct net_device *ndev = ax_local->ndev; + + isr = AX_READ(&ax_local->ax_spi, P0_ISR); + AX_WRITE(&ax_local->ax_spi, isr, P0_ISR); + + netif_dbg(ax_local, intr, ndev, " ISR 0x%04x\n", isr); + + if (isr & ISR_TXERR) { + netif_dbg(ax_local, intr, ndev, " TXERR interrupt\n"); + AX_WRITE(&ax_local->ax_spi, TXNR_TXB_REINIT, P0_TSNR); + ax_local->seq_num = 0x1f; + } + + if (isr & ISR_TXPAGES) { + netif_dbg(ax_local, intr, ndev, " TXPAGES interrupt\n"); + set_bit(EVENT_TX, &ax_local->flags); + } + + if (isr & ISR_LINK) { + netif_dbg(ax_local, intr, ndev, " Link change interrupt\n"); + phy_mac_interrupt(ax_local->ndev->phydev); + } + + if (isr & ISR_RXPKT) { + netif_dbg(ax_local, intr, ndev, " RX interrupt\n"); + done = ax88796c_receive(ax_local->ndev); + } + + return done; +} + +static irqreturn_t ax88796c_interrupt(int irq, void *dev_instance) +{ + struct net_device *ndev = dev_instance; + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + if (!ndev) { + pr_err("irq %d for unknown device.\n", irq); + return IRQ_RETVAL(0); + } + + disable_irq_nosync(irq); + + netif_dbg(ax_local, intr, ndev, "Interrupt occurred\n"); + + set_bit(EVENT_INTR, &ax_local->flags); + queue_work(ax_local->ax_work_queue, &ax_local->ax_work); + + return IRQ_HANDLED; +} + +static void ax88796c_work(struct work_struct *work) +{ + struct ax88796c_device *ax_local = + container_of(work, struct ax88796c_device, ax_work); + + mutex_lock(&ax_local->spi_lock); + + if (test_bit(EVENT_SET_MULTI, &ax_local->flags)) { + ax88796c_set_hw_multicast(ax_local->ndev); + clear_bit(EVENT_SET_MULTI, &ax_local->flags); + } + + if (test_bit(EVENT_INTR, &ax_local->flags)) { + AX_WRITE(&ax_local->ax_spi, IMR_MASKALL, P0_IMR); + + while (1) { + if (!ax88796c_process_isr(ax_local)) + break; + } + + clear_bit(EVENT_INTR, &ax_local->flags); + + AX_WRITE(&ax_local->ax_spi, IMR_DEFAULT, P0_IMR); + + enable_irq(ax_local->ndev->irq); + } + + if (test_bit(EVENT_TX, &ax_local->flags)) { + while (skb_queue_len(&ax_local->tx_wait_q)) { + if (!ax88796c_hard_xmit(ax_local)) + break; + } + + clear_bit(EVENT_TX, &ax_local->flags); + + if (netif_queue_stopped(ax_local->ndev) && + (skb_queue_len(&ax_local->tx_wait_q) < TX_QUEUE_LOW_WATER)) + netif_wake_queue(ax_local->ndev); + } + + mutex_unlock(&ax_local->spi_lock); +} + +static struct net_device_stats *ax88796c_get_stats(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + return &ax_local->stats; +} + +static void ax88796c_handle_link_change(struct net_device *ndev) +{ + if (net_ratelimit()) + phy_print_status(ndev->phydev); +} + +void ax88796c_phy_init(struct ax88796c_device *ax_local) +{ + /* Enable PHY auto-polling */ + AX_WRITE(&ax_local->ax_spi, + PCR_PHYID(0x10) | PCR_POLL_EN | + PCR_POLL_FLOWCTRL | PCR_POLL_BMCR, P2_PCR); +} + +static int +ax88796c_open(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + int ret; + unsigned long irq_flag = IRQF_SHARED; + + mutex_lock(&ax_local->spi_lock); + + ret = ax88796c_soft_reset(ax_local); + if (ret < 0) + return -ENODEV; + + ret = request_irq(ndev->irq, ax88796c_interrupt, + irq_flag, ndev->name, ndev); + if (ret) { + netdev_err(ndev, "unable to get IRQ %d (errno=%d).\n", + ndev->irq, ret); + return -ENXIO; + } + + ax_local->seq_num = 0x1f; + + ax88796c_set_mac_addr(ndev); + ax88796c_set_csums(ax_local); + + /* Disable stuffing packet */ + AX_WRITE(&ax_local->ax_spi, + AX_READ(&ax_local->ax_spi, P1_RXBSPCR) + & ~RXBSPCR_STUF_ENABLE, P1_RXBSPCR); + + /* Enable RX packet process */ + AX_WRITE(&ax_local->ax_spi, RPPER_RXEN, P1_RPPER); + + AX_WRITE(&ax_local->ax_spi, AX_READ(&ax_local->ax_spi, P0_FER) + | FER_RXEN | FER_TXEN | FER_BSWAP | FER_IRQ_PULL, P0_FER); + + /* Setup LED mode */ + AX_WRITE(&ax_local->ax_spi, + (LCR_LED0_EN | LCR_LED0_DUPLEX | LCR_LED1_EN | + LCR_LED1_100MODE), P2_LCR0); + AX_WRITE(&ax_local->ax_spi, + (AX_READ(&ax_local->ax_spi, P2_LCR1) & LCR_LED2_MASK) | + LCR_LED2_EN | LCR_LED2_LINK, P2_LCR1); + + ax88796c_phy_init(ax_local); + + phy_start(ax_local->ndev->phydev); + + netif_start_queue(ndev); + + AX_WRITE(&ax_local->ax_spi, IMR_DEFAULT, P0_IMR); + + spi_message_init(&ax_local->ax_spi.rx_msg); + + mutex_unlock(&ax_local->spi_lock); + + return 0; +} + +static void ax88796c_free_skb_queue(struct sk_buff_head *q) +{ + struct sk_buff *skb; + + while (q->qlen) { + skb = skb_dequeue(q); + kfree_skb(skb); + } +} + +static int +ax88796c_close(struct net_device *ndev) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + + netif_stop_queue(ndev); + + free_irq(ndev->irq, ndev); + + phy_stop(ndev->phydev); + + mutex_lock(&ax_local->spi_lock); + + AX_WRITE(&ax_local->ax_spi, IMR_MASKALL, P0_IMR); + ax88796c_free_skb_queue(&ax_local->tx_wait_q); + + ax88796c_soft_reset(ax_local); + + mutex_unlock(&ax_local->spi_lock); + netif_carrier_off(ndev); + + return 0; +} + +static int +ax88796c_set_features(struct net_device *ndev, netdev_features_t features) +{ + struct ax88796c_device *ax_local = to_ax88796c_device(ndev); + netdev_features_t changed = features ^ ndev->features; + + if (!(changed & (NETIF_F_RXCSUM | NETIF_F_HW_CSUM))) + return 0; + + ndev->features = features; + + if (changed & (NETIF_F_RXCSUM | NETIF_F_HW_CSUM)) + ax88796c_set_csums(ax_local); + + return 0; +} + +static const struct net_device_ops ax88796c_netdev_ops = { + .ndo_open = ax88796c_open, + .ndo_stop = ax88796c_close, + .ndo_start_xmit = ax88796c_start_xmit, + .ndo_get_stats = ax88796c_get_stats, + .ndo_do_ioctl = ax88796c_ioctl, + .ndo_set_mac_address = ax88796c_set_mac_address, + .ndo_set_features = ax88796c_set_features, +}; + +static int ax88796c_hard_reset(struct ax88796c_device *ax_local) +{ + struct device *dev = (struct device *)&ax_local->spi->dev; + struct gpio_desc *reset_gpio; + + /* reset info */ + reset_gpio = gpiod_get(dev, "reset", 0); + if (IS_ERR(reset_gpio)) { + dev_err(dev, "Could not get 'reset' GPIO: %ld", PTR_ERR(reset_gpio)); + return PTR_ERR(reset_gpio); + } + + /* set reset */ + gpiod_direction_output(reset_gpio, 1); + msleep(100); + gpiod_direction_output(reset_gpio, 0); + gpiod_put(reset_gpio); + msleep(20); + + return 0; +} + +static int ax88796c_probe(struct spi_device *spi) +{ + struct net_device *ndev; + struct ax88796c_device *ax_local; + int ret; + u16 temp; + + ndev = devm_alloc_etherdev(&spi->dev, sizeof(*ax_local)); + if (!ndev) { + dev_err(&spi->dev, "AX88796C SPI: Could not allocate ethernet device\n"); + return -ENOMEM; + } + SET_NETDEV_DEV(ndev, &spi->dev); + + ax_local = to_ax88796c_device(ndev); + memset(ax_local, 0, sizeof(*ax_local)); + + dev_set_drvdata(&spi->dev, ax_local); + ax_local->spi = spi; + ax_local->ax_spi.spi = spi; + + ax_local->ndev = ndev; + ax_local->capabilities |= comp ? AX_CAP_COMP : 0; + ax_local->msg_enable = msg_enable; + + ax_local->mdiobus = devm_mdiobus_alloc(&spi->dev); + if (!ax_local->mdiobus) { + dev_err(&spi->dev, "Could not allocate MDIO bus\n"); + return -ENOMEM; + } + + ax_local->mdiobus->priv = ax_local; + ax_local->mdiobus->read = ax88796c_mdio_read; + ax_local->mdiobus->write = ax88796c_mdio_write; + ax_local->mdiobus->name = "ax88976c-mdiobus"; + ax_local->mdiobus->phy_mask = ~(1 << 0x10); + ax_local->mdiobus->parent = &spi->dev; + + snprintf(ax_local->mdiobus->id, ARRAY_SIZE(ax_local->mdiobus->id), + "ax88796c-spi-%s.%u", dev_name(&spi->dev), spi->chip_select); + + ret = devm_mdiobus_register(&spi->dev, ax_local->mdiobus); + if (ret < 0) { + dev_err(&spi->dev, "Could not register MDIO bus\n"); + return ret; + } + + if (netif_msg_probe(ax_local)) { + dev_info(&spi->dev, "AX88796C-SPI Configuration:\n"); + dev_info(&spi->dev, " Compression : %s\n", + ax_local->capabilities & AX_CAP_COMP ? "ON" : "OFF"); + } + + ndev->irq = spi->irq; + ndev->netdev_ops = &ax88796c_netdev_ops; + ndev->ethtool_ops = &ax88796c_ethtool_ops; + ndev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM; + ndev->features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM; + ndev->hard_header_len += (TX_OVERHEAD + 4); + + /* ax88796c gpio reset */ + ax88796c_hard_reset(ax_local); + + /* Reset AX88796C */ + ret = ax88796c_soft_reset(ax_local); + if (ret < 0) { + ret = -ENODEV; + goto err; + } + /* Check board revision */ + temp = AX_READ(&ax_local->ax_spi, P2_CRIR); + if ((temp & 0xF) != 0x0) { + dev_err(&spi->dev, "spi read failed: %d\n", temp); + ret = -ENODEV; + goto err; + } + + temp = AX_READ(&ax_local->ax_spi, P0_BOR); + if (temp == 0x1234) { + ax_local->plat_endian = PLAT_LITTLE_ENDIAN; + } else { + AX_WRITE(&ax_local->ax_spi, 0xFFFF, P0_BOR); + ax_local->plat_endian = PLAT_BIG_ENDIAN; + } + + /*Reload EEPROM*/ + ax88796c_reload_eeprom(ax_local); + + ax88796c_load_mac_addr(ndev); + + if (netif_msg_probe(ax_local)) + dev_info(&spi->dev, + "irq %d, MAC addr %02X:%02X:%02X:%02X:%02X:%02X\n", + ndev->irq, + ndev->dev_addr[0], ndev->dev_addr[1], + ndev->dev_addr[2], ndev->dev_addr[3], + ndev->dev_addr[4], ndev->dev_addr[5]); + + /* Disable power saving */ + AX_WRITE(&ax_local->ax_spi, (AX_READ(&ax_local->ax_spi, P0_PSCR) + & PSCR_PS_MASK) | PSCR_PS_D0, P0_PSCR); + + INIT_WORK(&ax_local->ax_work, ax88796c_work); + + ax_local->ax_work_queue = + create_singlethread_workqueue("ax88796c_work"); + + mutex_init(&ax_local->spi_lock); + + skb_queue_head_init(&ax_local->tx_wait_q); + + ret = devm_register_netdev(&spi->dev, ndev); + if (ret) { + dev_err(&spi->dev, "failed to register a network device\n"); + destroy_workqueue(ax_local->ax_work_queue); + goto err; + } + + ax_local->phydev = phy_find_first(ax_local->mdiobus); + if (!ax_local->phydev) { + dev_err(&spi->dev, "no PHY found\n"); + ret = -ENODEV; + goto err; + } + + ax_local->phydev->irq = PHY_IGNORE_INTERRUPT; + phy_connect_direct(ax_local->ndev, ax_local->phydev, + ax88796c_handle_link_change, + PHY_INTERFACE_MODE_MII); + + netif_info(ax_local, probe, ndev, "%s %s registered\n", + dev_driver_string(&spi->dev), + dev_name(&spi->dev)); + phy_attached_info(ax_local->phydev); + + ret = 0; +err: + return ret; +} + +static int ax88796c_remove(struct spi_device *spi) +{ + struct ax88796c_device *ax_local = dev_get_drvdata(&spi->dev); + struct net_device *ndev = ax_local->ndev; + + netif_info(ax_local, probe, ndev, "removing network device %s %s\n", + dev_driver_string(&spi->dev), + dev_name(&spi->dev)); + + destroy_workqueue(ax_local->ax_work_queue); + + return 0; +} + +static const struct of_device_id ax88796c_dt_ids[] = { + { .compatible = "asix,ax88796c" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ax88796c_dt_ids); + +static const struct spi_device_id asix_id[] = { + { "ax88796c", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, asix_id); + +static struct spi_driver ax88796c_spi_driver = { + .driver = { + .name = DRV_NAME, +#ifdef CONFIG_USE_OF + .of_match_table = of_match_ptr(ax88796c_dt_ids), +#endif + }, + .probe = ax88796c_probe, + .remove = ax88796c_remove, + .id_table = asix_id, +}; + +static __init int ax88796c_spi_init(void) +{ + int ret; + + bitmap_zero(ax88796c_no_regs_mask, AX88796C_REGDUMP_LEN); + ret = bitmap_parse(no_regs_list, 35, + ax88796c_no_regs_mask, AX88796C_REGDUMP_LEN); + if (ret) { + bitmap_fill(ax88796c_no_regs_mask, AX88796C_REGDUMP_LEN); + pr_err("Invalid bitmap description, masking all registers\n"); + } + + return spi_register_driver(&ax88796c_spi_driver); +} + +static __exit void ax88796c_spi_exit(void) +{ + spi_unregister_driver(&ax88796c_spi_driver); +} + +module_init(ax88796c_spi_init); +module_exit(ax88796c_spi_exit); + +MODULE_AUTHOR("ASIX"); +MODULE_DESCRIPTION("ASIX AX88796C SPI Ethernet driver"); +MODULE_LICENSE("GPL"); + +/* ax88796c_phy */ diff --git a/drivers/net/ethernet/asix/ax88796c_main.h b/drivers/net/ethernet/asix/ax88796c_main.h new file mode 100644 index 000000000000..428833978fbf --- /dev/null +++ b/drivers/net/ethernet/asix/ax88796c_main.h @@ -0,0 +1,568 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2010 ASIX Electronics Corporation + * Copyright (c) 2020 Samsung Electronics + * + * ASIX AX88796C SPI Fast Ethernet Linux driver + */ + +#ifndef _AX88796C_MAIN_H +#define _AX88796C_MAIN_H + +#include <linux/netdevice.h> +#include <linux/mii.h> + +#include "ax88796c_spi.h" + +/* These identify the driver base version and may not be removed. */ +#define DRV_NAME "ax88796c" +#define ADP_NAME "ASIX AX88796C SPI Ethernet Adapter" +#define DRV_VERSION "1.2.0" + +#define TX_QUEUE_HIGH_WATER 45 /* Tx queue high water mark */ +#define TX_QUEUE_LOW_WATER 20 /* Tx queue low water mark */ + +#define AX88796C_REGDUMP_LEN 256 +#define AX88796C_PHY_REGDUMP_LEN 12 + +#define TX_OVERHEAD 8 +#define TX_EOP_SIZE 4 + +#define AX_MCAST_FILTER_SIZE 8 +#define AX_MAX_MCAST 64 +#define AX_MAX_CLK 80000000 +#define TX_HDR_SOP_DICF 0x8000 +#define TX_HDR_SOP_CPHI 0x4000 +#define TX_HDR_SOP_INT 0x2000 +#define TX_HDR_SOP_MDEQ 0x1000 +#define TX_HDR_SOP_PKTLEN 0x07FF +#define TX_HDR_SOP_SEQNUM 0xF800 +#define TX_HDR_SOP_PKTLENBAR 0x07FF + +#define TX_HDR_SEG_FS 0x8000 +#define TX_HDR_SEG_LS 0x4000 +#define TX_HDR_SEG_SEGNUM 0x3800 +#define TX_HDR_SEG_SEGLEN 0x0700 +#define TX_HDR_SEG_EOFST 0xC000 +#define TX_HDR_SEG_SOFST 0x3800 +#define TX_HDR_SEG_SEGLENBAR 0x07FF + +#define TX_HDR_EOP_SEQNUM 0xF800 +#define TX_HDR_EOP_PKTLEN 0x07FF +#define TX_HDR_EOP_SEQNUMBAR 0xF800 +#define TX_HDR_EOP_PKTLENBAR 0x07FF + +/* Rx header fields mask */ +#define RX_HDR1_MCBC 0x8000 +#define RX_HDR1_STUFF_PKT 0x4000 +#define RX_HDR1_MII_ERR 0x2000 +#define RX_HDR1_CRC_ERR 0x1000 +#define RX_HDR1_PKT_LEN 0x07FF + +#define RX_HDR2_SEQ_NUM 0xF800 +#define RX_HDR2_PKT_LEN_BAR 0x7FFF + +#define RX_HDR3_PE 0x8000 +#define RX_HDR3_L3_TYPE_IPV4V6 0x6000 +#define RX_HDR3_L3_TYPE_IP 0x4000 +#define RX_HDR3_L3_TYPE_IPV6 0x2000 +#define RX_HDR3_L4_TYPE_ICMPV6 0x1400 +#define RX_HDR3_L4_TYPE_TCP 0x1000 +#define RX_HDR3_L4_TYPE_IGMP 0x0c00 +#define RX_HDR3_L4_TYPE_ICMP 0x0800 +#define RX_HDR3_L4_TYPE_UDP 0x0400 +#define RX_HDR3_L3_ERR 0x0200 +#define RX_HDR3_L4_ERR 0x0100 +#define RX_HDR3_PRIORITY(x) ((x) << 4) +#define RX_HDR3_STRIP 0x0008 +#define RX_HDR3_VLAN_ID 0x0007 + +enum watchdog_state { + chk_link = 0, + chk_cable, + ax_nop, +}; + +struct ax88796c_device { + struct resource *addr_res; /* resources found */ + struct resource *addr_req; /* resources requested */ + struct resource *irq_res; + + struct spi_device *spi; + struct net_device *ndev; + struct net_device_stats stats; + + struct timer_list watchdog; + enum watchdog_state w_state; + size_t w_ticks; + + struct work_struct ax_work; + struct workqueue_struct *ax_work_queue; + struct tasklet_struct bh; + + struct mutex spi_lock; /* device access */ + + struct sk_buff_head tx_wait_q; + + struct axspi_data ax_spi; + + struct mii_bus *mdiobus; + struct phy_device *phydev; + + int msg_enable; + + u16 seq_num; + + u8 multi_filter[AX_MCAST_FILTER_SIZE]; + + unsigned long capabilities; + #define AX_CAP_DMA 1 + #define AX_CAP_COMP 2 + #define AX_CAP_BIDIR 4 + + u8 plat_endian; + #define PLAT_LITTLE_ENDIAN 0 + #define PLAT_BIG_ENDIAN 1 + + unsigned long flags; + #define EVENT_INTR 1 + #define EVENT_TX 2 + #define EVENT_SET_MULTI 4 + +}; + +#define to_ax88796c_device(ndev) ((struct ax88796c_device *)netdev_priv(ndev)) + +enum skb_state { + illegal = 0, + tx_done, + rx_done, + rx_err, +}; + +struct skb_data; + +struct skb_data { + enum skb_state state; + struct net_device *ndev; + struct sk_buff *skb; + size_t len; + dma_addr_t phy_addr; +}; + +/* A88796C register definition */ + /* Definition of PAGE0 */ +#define P0_PSR (0x00) + #define PSR_DEV_READY (1 << 7) + #define PSR_RESET (0 << 15) + #define PSR_RESET_CLR (1 << 15) +#define P0_BOR (0x02) +#define P0_FER (0x04) + #define FER_IPALM (1 << 0) + #define FER_DCRC (1 << 1) + #define FER_RH3M (1 << 2) + #define FER_HEADERSWAP (1 << 7) + #define FER_WSWAP (1 << 8) + #define FER_BSWAP (1 << 9) + #define FER_INTHI (1 << 10) + #define FER_INTLO (0 << 10) + #define FER_IRQ_PULL (1 << 11) + #define FER_RXEN (1 << 14) + #define FER_TXEN (1 << 15) +#define P0_ISR (0x06) + #define ISR_RXPKT (1 << 0) + #define ISR_MDQ (1 << 4) + #define ISR_TXT (1 << 5) + #define ISR_TXPAGES (1 << 6) + #define ISR_TXERR (1 << 8) + #define ISR_LINK (1 << 9) +#define P0_IMR (0x08) + #define IMR_RXPKT (1 << 0) + #define IMR_MDQ (1 << 4) + #define IMR_TXT (1 << 5) + #define IMR_TXPAGES (1 << 6) + #define IMR_TXERR (1 << 8) + #define IMR_LINK (1 << 9) + #define IMR_MASKALL (0xFFFF) + #define IMR_DEFAULT (IMR_TXERR) +#define P0_WFCR (0x0A) + #define WFCR_PMEIND (1 << 0) /* PME indication */ + #define WFCR_PMETYPE (1 << 1) /* PME I/O type */ + #define WFCR_PMEPOL (1 << 2) /* PME polarity */ + #define WFCR_PMERST (1 << 3) /* Reset PME */ + #define WFCR_SLEEP (1 << 4) /* Enable sleep mode */ + #define WFCR_WAKEUP (1 << 5) /* Enable wakeup mode */ + #define WFCR_WAITEVENT (1 << 6) /* Reserved */ + #define WFCR_CLRWAKE (1 << 7) /* Clear wakeup */ + #define WFCR_LINKCH (1 << 8) /* Enable link change */ + #define WFCR_MAGICP (1 << 9) /* Enable magic packet */ + #define WFCR_WAKEF (1 << 10) /* Enable wakeup frame */ + #define WFCR_PMEEN (1 << 11) /* Enable PME pin */ + #define WFCR_LINKCHS (1 << 12) /* Link change status */ + #define WFCR_MAGICPS (1 << 13) /* Magic packet status */ + #define WFCR_WAKEFS (1 << 14) /* Wakeup frame status */ + #define WFCR_PMES (1 << 15) /* PME pin status */ +#define P0_PSCR (0x0C) + #define PSCR_PS_MASK (0xFFF0) + #define PSCR_PS_D0 (0) + #define PSCR_PS_D1 (1 << 0) + #define PSCR_PS_D2 (1 << 1) + #define PSCR_FPS (1 << 3) /* Enable fiber mode PS */ + #define PSCR_SWPS (1 << 4) /* Enable software */ + /* PS control */ + #define PSCR_WOLPS (1 << 5) /* Enable WOL PS */ + #define PSCR_SWWOL (1 << 6) /* Enable software select */ + /* WOL PS */ + #define PSCR_PHYOSC (1 << 7) /* Internal PHY OSC control */ + #define PSCR_FOFEF (1 << 8) /* Force PHY generate FEF */ + #define PSCR_FOF (1 << 9) /* Force PHY in fiber mode */ + #define PSCR_PHYPD (1 << 10) /* PHY power down. */ + /* Active high */ + #define PSCR_PHYRST (1 << 11) /* PHY reset signal. */ + /* Active low */ + #define PSCR_PHYCSIL (1 << 12) /* PHY cable energy detect */ + #define PSCR_PHYCOFF (1 << 13) /* PHY cable off */ + #define PSCR_PHYLINK (1 << 14) /* PHY link status */ + #define PSCR_EEPOK (1 << 15) /* EEPROM load complete */ +#define P0_MACCR (0x0E) + #define MACCR_RXFC_ENABLE (1 << 3) + #define MACCR_RXFC_MASK 0xFFF7 + #define MACCR_TXFC_ENABLE (1 << 4) + #define MACCR_TXFC_MASK 0xFFEF + #define MACCR_PSI (1 << 6) /* Software Cable-Off */ + /* Power Saving Interrupt */ + #define MACCR_PF (1 << 7) + #define MACCR_PMM_BITS 8 + #define MACCR_PMM_MASK (0x1F00) + #define MACCR_PMM_RESET (1 << 8) + #define MACCR_PMM_WAIT (2 << 8) + #define MACCR_PMM_READY (3 << 8) + #define MACCR_PMM_D1 (4 << 8) + #define MACCR_PMM_D2 (5 << 8) + #define MACCR_PMM_WAKE (7 << 8) + #define MACCR_PMM_D1_WAKE (8 << 8) + #define MACCR_PMM_D2_WAKE (9 << 8) + #define MACCR_PMM_SLEEP (10 << 8) + #define MACCR_PMM_PHY_RESET (11 << 8) + #define MACCR_PMM_SOFT_D1 (16 << 8) + #define MACCR_PMM_SOFT_D2 (17 << 8) +#define P0_TFBFCR (0x10) + #define TFBFCR_SCHE_FREE_PAGE 0xE07F + #define TFBFCR_FREE_PAGE_BITS 0x07 + #define TFBFCR_FREE_PAGE_LATCH (1 << 6) + #define TFBFCR_SET_FREE_PAGE(x) (((x) & 0x3F) << TFBFCR_FREE_PAGE_BITS) + #define TFBFCR_TX_PAGE_SET (1 << 13) + #define TFBFCR_MANU_ENTX (1 << 15) + #define TX_FREEBUF_MASK 0x003F + #define TX_DPTSTART 0x4000 + +#define P0_TSNR (0x12) + #define TXNR_TXB_ERR (1 << 5) + #define TXNR_TXB_IDLE (1 << 6) + #define TSNR_PKT_CNT(x) (((x) & 0x3F) << 8) + #define TXNR_TXB_REINIT (1 << 14) + #define TSNR_TXB_START (1 << 15) +#define P0_RTDPR (0x14) +#define P0_RXBCR1 (0x16) + #define RXBCR1_RXB_DISCARD (1 << 14) + #define RXBCR1_RXB_START (1 << 15) +#define P0_RXBCR2 (0x18) + #define RXBCR2_PKT_MASK (0xFF) + #define RXBCR2_RXPC_MASK (0x7F) + #define RXBCR2_RXB_READY (1 << 13) + #define RXBCR2_RXB_IDLE (1 << 14) + #define RXBCR2_RXB_REINIT (1 << 15) +#define P0_RTWCR (0x1A) + #define RTWCR_RXWC_MASK (0x3FFF) + #define RTWCR_RX_LATCH (1 << 15) +#define P0_RCPHR (0x1C) + + /* Definition of PAGE1 */ +#define P1_RPPER (0x22) + #define RPPER_RXEN (1 << 0) +#define P1_MRCR (0x28) +#define P1_MDR (0x2A) +#define P1_RMPR (0x2C) +#define P1_TMPR (0x2E) +#define P1_RXBSPCR (0x30) + #define RXBSPCR_STUF_WORD_CNT(x) (((x) & 0x7000) >> 12) + #define RXBSPCR_STUF_ENABLE (1 << 15) +#define P1_MCR (0x32) + #define MCR_SBP (1 << 8) + #define MCR_SM (1 << 9) + #define MCR_CRCENLAN (1 << 11) + #define MCR_STP (1 << 12) + /* Definition of PAGE2 */ +#define P2_CIR (0x42) +#define P2_PCR (0x44) + #define PCR_POLL_EN (1 << 0) + #define PCR_POLL_FLOWCTRL (1 << 1) + #define PCR_POLL_BMCR (1 << 2) + #define PCR_PHYID(x) ((x) << 8) +#define P2_PHYSR (0x46) +#define P2_MDIODR (0x48) +#define P2_MDIOCR (0x4A) + #define MDIOCR_RADDR(x) ((x) & 0x1F) + #define MDIOCR_FADDR(x) (((x) & 0x1F) << 8) + #define MDIOCR_VALID (1 << 13) + #define MDIOCR_READ (1 << 14) + #define MDIOCR_WRITE (1 << 15) +#define P2_LCR0 (0x4C) + #define LCR_LED0_EN (1 << 0) + #define LCR_LED0_100MODE (1 << 1) + #define LCR_LED0_DUPLEX (1 << 2) + #define LCR_LED0_LINK (1 << 3) + #define LCR_LED0_ACT (1 << 4) + #define LCR_LED0_COL (1 << 5) + #define LCR_LED0_10MODE (1 << 6) + #define LCR_LED0_DUPCOL (1 << 7) + #define LCR_LED1_EN (1 << 8) + #define LCR_LED1_100MODE (1 << 9) + #define LCR_LED1_DUPLEX (1 << 10) + #define LCR_LED1_LINK (1 << 11) + #define LCR_LED1_ACT (1 << 12) + #define LCR_LED1_COL (1 << 13) + #define LCR_LED1_10MODE (1 << 14) + #define LCR_LED1_DUPCOL (1 << 15) +#define P2_LCR1 (0x4E) + #define LCR_LED2_MASK (0xFF00) + #define LCR_LED2_EN (1 << 0) + #define LCR_LED2_100MODE (1 << 1) + #define LCR_LED2_DUPLEX (1 << 2) + #define LCR_LED2_LINK (1 << 3) + #define LCR_LED2_ACT (1 << 4) + #define LCR_LED2_COL (1 << 5) + #define LCR_LED2_10MODE (1 << 6) + #define LCR_LED2_DUPCOL (1 << 7) +#define P2_IPGCR (0x50) +#define P2_CRIR (0x52) +#define P2_FLHWCR (0x54) +#define P2_RXCR (0x56) + #define RXCR_PRO (1 << 0) + #define RXCR_AMALL (1 << 1) + #define RXCR_SEP (1 << 2) + #define RXCR_AB (1 << 3) + #define RXCR_AM (1 << 4) + #define RXCR_AP (1 << 5) + #define RXCR_ARP (1 << 6) +#define P2_JLCR (0x58) +#define P2_MPLR (0x5C) + + /* Definition of PAGE3 */ +#define P3_MACASR0 (0x62) + #define P3_MACASR(x) (P3_MACASR0 + 2 * (x)) + #define MACASR_LOWBYTE_MASK 0x00FF + #define MACASR_HIGH_BITS 0x08 +#define P3_MACASR1 (0x64) +#define P3_MACASR2 (0x66) +#define P3_MFAR01 (0x68) +#define P3_MFAR_BASE (0x68) + #define P3_MFAR(x) (P3_MFAR_BASE + 2 * (x)) + +#define P3_MFAR23 (0x6A) +#define P3_MFAR45 (0x6C) +#define P3_MFAR67 (0x6E) +#define P3_VID0FR (0x70) +#define P3_VID1FR (0x72) +#define P3_EECSR (0x74) +#define P3_EEDR (0x76) +#define P3_EECR (0x78) + #define EECR_ADDR_MASK (0x00FF) + #define EECR_READ_ACT (1 << 8) + #define EECR_WRITE_ACT (1 << 9) + #define EECR_WRITE_DISABLE (1 << 10) + #define EECR_WRITE_ENABLE (1 << 11) + #define EECR_EE_READY (1 << 13) + #define EECR_RELOAD (1 << 14) + #define EECR_RESET (1 << 15) +#define P3_TPCR (0x7A) + #define TPCR_PATT_MASK (0xFF) + #define TPCR_RAND_PKT_EN (1 << 14) + #define TPCR_FIXED_PKT_EN (1 << 15) +#define P3_TPLR (0x7C) + /* Definition of PAGE4 */ +#define P4_SPICR (0x8A) + #define SPICR_RCEN (1 << 0) + #define SPICR_QCEN (1 << 1) + #define SPICR_RBRE (1 << 3) + #define SPICR_PMM (1 << 4) + #define SPICR_LOOPBACK (1 << 8) + #define SPICR_CORE_RES_CLR (1 << 10) + #define SPICR_SPI_RES_CLR (1 << 11) +#define P4_SPIISMR (0x8C) + +#define P4_COERCR0 (0x92) + #define COERCR0_RXIPCE (1 << 0) + #define COERCR0_RXIPVE (1 << 1) + #define COERCR0_RXV6PE (1 << 2) + #define COERCR0_RXTCPE (1 << 3) + #define COERCR0_RXUDPE (1 << 4) + #define COERCR0_RXICMP (1 << 5) + #define COERCR0_RXIGMP (1 << 6) + #define COERCR0_RXICV6 (1 << 7) + + #define COERCR0_RXTCPV6 (1 << 8) + #define COERCR0_RXUDPV6 (1 << 9) + #define COERCR0_RXICMV6 (1 << 10) + #define COERCR0_RXIGMV6 (1 << 11) + #define COERCR0_RXICV6V6 (1 << 12) + + #define COERCR0_DEFAULT (COERCR0_RXIPCE | COERCR0_RXV6PE | \ + COERCR0_RXTCPE | COERCR0_RXUDPE | \ + COERCR0_RXTCPV6 | COERCR0_RXUDPV6) +#define P4_COERCR1 (0x94) + #define COERCR1_IPCEDP (1 << 0) + #define COERCR1_IPVEDP (1 << 1) + #define COERCR1_V6VEDP (1 << 2) + #define COERCR1_TCPEDP (1 << 3) + #define COERCR1_UDPEDP (1 << 4) + #define COERCR1_ICMPDP (1 << 5) + #define COERCR1_IGMPDP (1 << 6) + #define COERCR1_ICV6DP (1 << 7) + #define COERCR1_RX64TE (1 << 8) + #define COERCR1_RXPPPE (1 << 9) + #define COERCR1_TCP6DP (1 << 10) + #define COERCR1_UDP6DP (1 << 11) + #define COERCR1_IC6DP (1 << 12) + #define COERCR1_IG6DP (1 << 13) + #define COERCR1_ICV66DP (1 << 14) + #define COERCR1_RPCE (1 << 15) + + #define COERCR1_DEFAULT (COERCR1_RXPPPE) + +#define P4_COETCR0 (0x96) + #define COETCR0_TXIP (1 << 0) + #define COETCR0_TXTCP (1 << 1) + #define COETCR0_TXUDP (1 << 2) + #define COETCR0_TXICMP (1 << 3) + #define COETCR0_TXIGMP (1 << 4) + #define COETCR0_TXICV6 (1 << 5) + #define COETCR0_TXTCPV6 (1 << 8) + #define COETCR0_TXUDPV6 (1 << 9) + #define COETCR0_TXICMV6 (1 << 10) + #define COETCR0_TXIGMV6 (1 << 11) + #define COETCR0_TXICV6V6 (1 << 12) + + #define COETCR0_DEFAULT (COETCR0_TXIP | COETCR0_TXTCP | \ + COETCR0_TXUDP | COETCR0_TXTCPV6 | \ + COETCR0_TXUDPV6) +#define P4_COETCR1 (0x98) + #define COETCR1_TX64TE (1 << 0) + #define COETCR1_TXPPPE (1 << 1) + +#define P4_COECEDR (0x9A) +#define P4_L2CECR (0x9C) + + /* Definition of PAGE5 */ +#define P5_WFTR (0xA2) + #define WFTR_2MS (0x01) + #define WFTR_4MS (0x02) + #define WFTR_8MS (0x03) + #define WFTR_16MS (0x04) + #define WFTR_32MS (0x05) + #define WFTR_64MS (0x06) + #define WFTR_128MS (0x07) + #define WFTR_256MS (0x08) + #define WFTR_512MS (0x09) + #define WFTR_1024MS (0x0A) + #define WFTR_2048MS (0x0B) + #define WFTR_4096MS (0x0C) + #define WFTR_8192MS (0x0D) + #define WFTR_16384MS (0x0E) + #define WFTR_32768MS (0x0F) +#define P5_WFCCR (0xA4) +#define P5_WFCR03 (0xA6) + #define WFCR03_F0_EN (1 << 0) + #define WFCR03_F1_EN (1 << 4) + #define WFCR03_F2_EN (1 << 8) + #define WFCR03_F3_EN (1 << 12) +#define P5_WFCR47 (0xA8) + #define WFCR47_F4_EN (1 << 0) + #define WFCR47_F5_EN (1 << 4) + #define WFCR47_F6_EN (1 << 8) + #define WFCR47_F7_EN (1 << 12) +#define P5_WF0BMR0 (0xAA) +#define P5_WF0BMR1 (0xAC) +#define P5_WF0CR (0xAE) +#define P5_WF0OBR (0xB0) +#define P5_WF1BMR0 (0xB2) +#define P5_WF1BMR1 (0xB4) +#define P5_WF1CR (0xB6) +#define P5_WF1OBR (0xB8) +#define P5_WF2BMR0 (0xBA) +#define P5_WF2BMR1 (0xBC) + + /* Definition of PAGE6 */ +#define P6_WF2CR (0xC2) +#define P6_WF2OBR (0xC4) +#define P6_WF3BMR0 (0xC6) +#define P6_WF3BMR1 (0xC8) +#define P6_WF3CR (0xCA) +#define P6_WF3OBR (0xCC) +#define P6_WF4BMR0 (0xCE) +#define P6_WF4BMR1 (0xD0) +#define P6_WF4CR (0xD2) +#define P6_WF4OBR (0xD4) +#define P6_WF5BMR0 (0xD6) +#define P6_WF5BMR1 (0xD8) +#define P6_WF5CR (0xDA) +#define P6_WF5OBR (0xDC) + +/* Definition of PAGE7 */ +#define P7_WF6BMR0 (0xE2) +#define P7_WF6BMR1 (0xE4) +#define P7_WF6CR (0xE6) +#define P7_WF6OBR (0xE8) +#define P7_WF7BMR0 (0xEA) +#define P7_WF7BMR1 (0xEC) +#define P7_WF7CR (0xEE) +#define P7_WF7OBR (0xF0) +#define P7_WFR01 (0xF2) +#define P7_WFR23 (0xF4) +#define P7_WFR45 (0xF6) +#define P7_WFR67 (0xF8) +#define P7_WFPC0 (0xFA) +#define P7_WFPC1 (0xFC) + +/* Tx headers structure */ +struct tx_sop_header { + /* bit 15-11: flags, bit 10-0: packet length */ + u16 flags_len; + /* bit 15-11: sequence number, bit 11-0: packet length bar */ + u16 seq_lenbar; +} __packed; + +struct tx_segment_header { + /* bit 15-14: flags, bit 13-11: segment number */ + /* bit 10-0: segment length */ + u16 flags_seqnum_seglen; + /* bit 15-14: end offset, bit 13-11: start offset */ + /* bit 10-0: segment length bar */ + u16 eo_so_seglenbar; +} __packed; + +struct tx_eop_header { + /* bit 15-11: sequence number, bit 10-0: packet length */ + u16 seq_len; + /* bit 15-11: sequence number bar, bit 10-0: packet length bar */ + u16 seqbar_lenbar; +} __packed; + +struct tx_pkt_info { + struct tx_sop_header sop; + struct tx_segment_header seg; + struct tx_eop_header eop; + u16 pkt_len; + u16 seq_num; +} __packed; + +/* Rx headers structure */ +struct rx_header { + u16 flags_len; + u16 seq_lenbar; + u16 flags; +} __packed; + +extern unsigned long ax88796c_no_regs_mask[]; + +#endif /* #ifndef _AX88796C_MAIN_H */ diff --git a/drivers/net/ethernet/asix/ax88796c_spi.c b/drivers/net/ethernet/asix/ax88796c_spi.c new file mode 100644 index 000000000000..1a20bbeb4dc1 --- /dev/null +++ b/drivers/net/ethernet/asix/ax88796c_spi.c @@ -0,0 +1,111 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2010 ASIX Electronics Corporation + * Copyright (c) 2020 Samsung Electronics Co., Ltd. + * + * ASIX AX88796C SPI Fast Ethernet Linux driver + */ + +#define pr_fmt(fmt) "ax88796c: " fmt + +#include <linux/string.h> +#include <linux/spi/spi.h> + +#include "ax88796c_spi.h" + +/* driver bus management functions */ +int axspi_wakeup(const struct axspi_data *ax_spi) +{ + u8 tx_buf; + int ret; + + tx_buf = AX_SPICMD_EXIT_PWD; /* OP */ + ret = spi_write(ax_spi->spi, &tx_buf, 1); + if (ret) + dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret); + return ret; +} + +int axspi_read_status(const struct axspi_data *ax_spi, struct spi_status *status) +{ + u8 tx_buf; + int ret; + + /* OP */ + tx_buf = AX_SPICMD_READ_STATUS; + ret = spi_write_then_read(ax_spi->spi, &tx_buf, 1, (u8 *)&status, 3); + if (ret) + dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret); + else + le16_to_cpus(&status->isr); + + return ret; +} + +int axspi_read_rxq(struct axspi_data *ax_spi, void *data, int len) +{ + struct spi_transfer *xfer = ax_spi->spi_rx_xfer; + int ret; + + memcpy(ax_spi->cmd_buf, rx_cmd_buf, 5); + + xfer->tx_buf = ax_spi->cmd_buf; + xfer->rx_buf = NULL; + xfer->len = ax_spi->comp ? 2 : 5; + xfer->bits_per_word = 8; + spi_message_add_tail(xfer, &ax_spi->rx_msg); + + xfer++; + xfer->rx_buf = data; + xfer->tx_buf = NULL; + xfer->len = len; + xfer->bits_per_word = 8; + spi_message_add_tail(xfer, &ax_spi->rx_msg); + ret = spi_sync(ax_spi->spi, &ax_spi->rx_msg); + if (ret) + dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret); + + return ret; +} + +int axspi_write_txq(const struct axspi_data *ax_spi, void *data, int len) +{ + return spi_write(ax_spi->spi, data, len); +} + +u16 axspi_read_reg(const struct axspi_data *ax_spi, u8 reg) +{ + u8 tx_buf[4]; + u16 rx_buf = 0; + int ret; + int len = ax_spi->comp ? 3 : 4; + + tx_buf[0] = 0x03; /* OP code read register */ + tx_buf[1] = reg; /* register address */ + tx_buf[2] = 0xFF; /* dumy cycle */ + tx_buf[3] = 0xFF; /* dumy cycle */ + ret = spi_write_then_read(ax_spi->spi, tx_buf, len, (u8 *)&rx_buf, 2); + if (ret) + dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret); + else + le16_to_cpus(&rx_buf); + + return rx_buf; +} + +int axspi_write_reg(const struct axspi_data *ax_spi, u8 reg, u16 value) +{ + u8 tx_buf[4]; + int ret; + + tx_buf[0] = AX_SPICMD_WRITE_REG; /* OP code read register */ + tx_buf[1] = reg; /* register address */ + tx_buf[2] = value; + tx_buf[3] = value >> 8; + + ret = spi_write(ax_spi->spi, tx_buf, 4); + if (ret) + dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret); + return ret; +} + diff --git a/drivers/net/ethernet/asix/ax88796c_spi.h b/drivers/net/ethernet/asix/ax88796c_spi.h new file mode 100644 index 000000000000..7a49205c2cfb --- /dev/null +++ b/drivers/net/ethernet/asix/ax88796c_spi.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2010 ASIX Electronics Corporation + * Copyright (c) 2020 Samsung Electronics Co., Ltd. + * + * ASIX AX88796C SPI Fast Ethernet Linux driver + */ + +#ifndef _AX88796C_SPI_H +#define _AX88796C_SPI_H + +#include <linux/spi/spi.h> +#include <linux/types.h> + +/* Definition of SPI command */ +#define AX_SPICMD_WRITE_TXQ 0x02 +#define AX_SPICMD_READ_REG 0x03 +#define AX_SPICMD_READ_STATUS 0x05 +#define AX_SPICMD_READ_RXQ 0x0B +#define AX_SPICMD_BIDIR_WRQ 0xB2 +#define AX_SPICMD_WRITE_REG 0xD8 +#define AX_SPICMD_EXIT_PWD 0xAB + +static const u8 rx_cmd_buf[5] = {AX_SPICMD_READ_RXQ, 0xFF, 0xFF, 0xFF, 0xFF}; +static const u8 tx_cmd_buf[4] = {AX_SPICMD_WRITE_TXQ, 0xFF, 0xFF, 0xFF}; + +struct axspi_data { + struct spi_device *spi; + struct spi_message rx_msg; + struct spi_transfer spi_rx_xfer[2]; + u8 cmd_buf[6]; + u8 comp; +}; + +struct spi_status { + u16 isr; + u8 status; +# define AX_STATUS_READY 0x80 +}; + +int axspi_read_rxq(struct axspi_data *ax_spi, void *data, int len); +int axspi_write_txq(const struct axspi_data *ax_spi, void *data, int len); +u16 axspi_read_reg(const struct axspi_data *ax_spi, u8 reg); +int axspi_write_reg(const struct axspi_data *ax_spi, u8 reg, u16 value); +int axspi_read_status(const struct axspi_data *ax_spi, struct spi_status *status); +int axspi_wakeup(const struct axspi_data *ax_spi); + +static inline u16 AX_READ(const struct axspi_data *ax_spi, u8 offset) +{ + return axspi_read_reg(ax_spi, offset); +} + +static inline int AX_WRITE(const struct axspi_data *ax_spi, u16 value, u8 offset) +{ + return axspi_write_reg(ax_spi, offset, value); +} + +static inline int AX_READ_STATUS(const struct axspi_data *ax_spi, + struct spi_status *status) +{ + return axspi_read_status(ax_spi, status); +} + +static inline int AX_WAKEUP(struct axspi_data *ax_spi) +{ + return axspi_wakeup(ax_spi); +} +#endif + -- 2.26.2
