On 10/28/20 10:40 PM, Łukasz Stelmach wrote: > 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 | 22 + > drivers/net/ethernet/asix/Makefile | 6 + > drivers/net/ethernet/asix/ax88796c_ioctl.c | 197 ++++ > drivers/net/ethernet/asix/ax88796c_ioctl.h | 26 + > drivers/net/ethernet/asix/ax88796c_main.c | 1144 ++++++++++++++++++++ > drivers/net/ethernet/asix/ax88796c_main.h | 578 ++++++++++ > drivers/net/ethernet/asix/ax88796c_spi.c | 111 ++ > drivers/net/ethernet/asix/ax88796c_spi.h | 69 ++ > 11 files changed, 2161 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 [...] > +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; are these used? > + > + struct work_struct ax_work; > + > + 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]; > + > + int link; > + int speed; > + int duplex; > + int pause; > + int asym_pause; > + int flowctrl; > + #define AX_FC_NONE 0 > + #define AX_FC_RX BIT(0) > + #define AX_FC_TX BIT(1) > + #define AX_FC_ANEG BIT(2) > + > + unsigned long capabilities; > + #define AX_CAP_DMA BIT(0) > + #define AX_CAP_COMP BIT(1) > + #define AX_CAP_BIDIR BIT(2) > + > + u8 plat_endian; > + #define PLAT_LITTLE_ENDIAN 0 > + #define PLAT_BIG_ENDIAN 1 > + > + unsigned long flags; > + #define EVENT_INTR BIT(0) > + #define EVENT_TX BIT(1) > + #define EVENT_SET_MULTI BIT(2) > + > +}; > + > +#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 { > + enum skb_state state; > + struct net_device *ndev; > + struct sk_buff *skb; > + size_t len; > + dma_addr_t phy_addr; unused? [...] > 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); spi_write() needs a DMA safe buffer. > + 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); I think you need DMA safe mem for spi_write(). Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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