Motorcomm YT921x is a series of ethernet switches developed by Shanghai Motorcomm Electronic Technology, including: - YT9215S / YT9215RB / YT9215SC: 5 GbE phys - YT9213NB / YT9214NB: 2 GbE phys - YT9218N / YT9218MB: 8 GbE phys and up to 2 serdes interfaces. This patch adds basic support for a working DSA switch, but not including any possible offloading capabilities. Driver verified on a stock wireless router with IPQ5018 + YT9215S. Signed-off-by: David Yang --- drivers/net/dsa/Kconfig | 7 + drivers/net/dsa/Makefile | 1 + drivers/net/dsa/yt921x.c | 1895 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 1903 insertions(+) create mode 100644 drivers/net/dsa/yt921x.c diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig index ec759f8cb0e2..1b789daab34c 100644 --- a/drivers/net/dsa/Kconfig +++ b/drivers/net/dsa/Kconfig @@ -152,4 +152,11 @@ config NET_DSA_VITESSE_VSC73XX_PLATFORM This enables support for the Vitesse VSC7385, VSC7388, VSC7395 and VSC7398 SparX integrated ethernet switches, connected over a CPU-attached address bus and work in memory-mapped I/O mode. + +config NET_DSA_YT921X + tristate "Motorcomm YT9215 ethernet switch chip support" + select NET_DSA_TAG_YT921X + help + This enables support for the Motorcomm YT9215 ethernet switch + chip. endmenu diff --git a/drivers/net/dsa/Makefile b/drivers/net/dsa/Makefile index cb9a97340e58..dc81769fa92b 100644 --- a/drivers/net/dsa/Makefile +++ b/drivers/net/dsa/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_NET_DSA_SMSC_LAN9303_MDIO) += lan9303_mdio.o obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX) += vitesse-vsc73xx-core.o obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_PLATFORM) += vitesse-vsc73xx-platform.o obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_SPI) += vitesse-vsc73xx-spi.o +obj-$(CONFIG_NET_DSA_YT921X) += yt921x.o obj-y += b53/ obj-y += hirschmann/ obj-y += microchip/ diff --git a/drivers/net/dsa/yt921x.c b/drivers/net/dsa/yt921x.c new file mode 100644 index 000000000000..07f66dd9be89 --- /dev/null +++ b/drivers/net/dsa/yt921x.c @@ -0,0 +1,1895 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Motorcomm YT921x Switch + * + * Should work on YT9213/YT9214/YT9215/YT9218, but only tested on YT9215+SGMII, + * be sure to do your own checks before porting to another chip. + * + * Copyright (c) 2025 David Yang + */ + +#include +#include +#include +#include +#include +#include +#include + +#undef dev_dbg +#define dev_dbg dev_info + +/******** hardware definitions ********/ + +#define YT921X_SMI_SWITCHIDf GENMASK(3, 2) +#define YT921X_SMI_SWITCHIDv(x) FIELD_PREP(YT921X_SMI_SWITCHIDf, (x)) +#define YT921X_SMI_ADf BIT(1) +#define YT921X_SMI_ADDRv 0 +#define YT921X_SMI_DATAv YT921X_SMI_ADf +#define YT921X_SMI_RWf BIT(0) +#define YT921X_SMI_WRITEv 0 +#define YT921X_SMI_READv YT921X_SMI_RWf + +#define YT921X_RESETm 0x80000 +#define YT921X_RESET_HWf BIT(31) +#define YT921X_RESET_SWf BIT(1) +#define YT921X_FUNCm 0x80004 +#define YT921X_FUNC_MIBf BIT(1) +#define YT921X_CHIP_IDm 0x80008 +#define YT921X_CHIP_ID_IDf GENMASK(31, 16) +#define YT921X_EXT_CPU_PORTm 0x8000c +#define YT921X_EXT_CPU_PORT_TAG_ENf BIT(15) +#define YT921X_EXT_CPU_PORT_PORT_ENf BIT(14) +#define YT921X_EXT_CPU_PORT_PORTf GENMASK(3, 0) +#define YT921X_EXT_CPU_PORT_PORTv(x) FIELD_PREP(YT921X_EXT_CPU_PORT_PORTf, (x)) +#define YT921X_CPU_TAG_TPIDm 0x80010 +#define YT921X_CPU_TAG_TPID_TPIDf GENMASK(15, 0) +#define YT921X_CPU_TAG_TPID_TPIDv 0x9988 +#define YT921X_EXTIF_SERDESm 0x80028 +#define YT921X_EXTIF_SERDES_ENf BIT(6) +#define YT921X_EXTIF_SERDES_EXTIFnf(port) BIT((port) - 8) +#define YT921X_SGMIInm(port) (0x8008c + 4 * ((port) - 8)) +#define YT921X_SGMII_MODEf GENMASK(9, 7) +#define YT921X_SGMII_MODEv(x) FIELD_PREP(YT921X_SGMII_MODEf, (x)) +#define YT921X_SGMII_MODE_SGMII_MACv YT921X_SGMII_MODEv(0) +#define YT921X_SGMII_MODE_SGMII_PHYv YT921X_SGMII_MODEv(1) +#define YT921X_SGMII_MODE_1000BASEXv YT921X_SGMII_MODEv(2) +#define YT921X_SGMII_MODE_100BASEXv YT921X_SGMII_MODEv(3) +#define YT921X_SGMII_MODE_2500BASEXv YT921X_SGMII_MODEv(4) +#define YT921X_SGMII_MODE_BASEXv YT921X_SGMII_MODEv(5) +#define YT921X_SGMII_MODE_DISABLEv YT921X_SGMII_MODEv(6) +#define YT921X_SGMII_RX_PAUSEf BIT(6) +#define YT921X_SGMII_TX_PAUSEf BIT(5) +#define YT921X_SGMII_LINKf BIT(4) /* force link */ +#define YT921X_SGMII_DUPLEX_FULLf BIT(3) +#define YT921X_SGMII_SPEEDf GENMASK(2, 0) +#define YT921X_SGMII_SPEEDv(x) FIELD_PREP(YT921X_SGMII_SPEEDf, (x)) +#define YT921X_SGMII_SPEED_10v YT921X_SGMII_SPEEDv(0) +#define YT921X_SGMII_SPEED_100v YT921X_SGMII_SPEEDv(1) +#define YT921X_SGMII_SPEED_1000v YT921X_SGMII_SPEEDv(2) +#define YT921X_SGMII_SPEED_2500v YT921X_SGMII_SPEEDv(4) +#define YT921X_PORTn_CTRLm(port) (0x80100 + 4 * (port)) +#define YT921X_PORT_CTRL_FLOW_CONTROL_ANf BIT(10) +#define YT921X_PORTn_STATUSm(port) (0x80200 + 4 * (port)) +#define YT921X_PORT_LINKf BIT(9) /* CTRL: auto negotiation */ +#define YT921X_PORT_HALF_FLOW_CONTROLf BIT(8) /* Half-duplex back pressure mode */ +#define YT921X_PORT_DUPLEX_FULLf BIT(7) +#define YT921X_PORT_RX_FLOW_CONTROLf BIT(6) +#define YT921X_PORT_TX_FLOW_CONTROLf BIT(5) +#define YT921X_PORT_RX_MAC_ENf BIT(4) +#define YT921X_PORT_TX_MAC_ENf BIT(3) +#define YT921X_PORT_SPEEDf GENMASK(2, 0) +#define YT921X_PORT_SPEEDv(x) FIELD_PREP(YT921X_PORT_SPEEDf, (x)) +#define YT921X_PORT_SPEED_10v YT921X_PORT_SPEEDv(0) +#define YT921X_PORT_SPEED_100v YT921X_PORT_SPEEDv(1) +#define YT921X_PORT_SPEED_1000v YT921X_PORT_SPEEDv(2) +#define YT921X_PORT_SPEED_2500v YT921X_PORT_SPEEDv(4) +#define YT921X_PON_STRAP_FUNCm 0x80320 +#define YT921X_PON_STRAP_VALm 0x80324 +#define YT921X_PON_STRAP_CAPm 0x80328 +#define YT921X_PON_STRAP_EEEf BIT(16) +#define YT921X_PON_STRAP_LOOP_DETECTf BIT(7) +#define YT921X_MDIO_POLLINGnm(port) (0x80364 + 4 * ((port) - 8)) +#define YT921X_MDIO_POLLING_DUPLEX_FULLf BIT(4) +#define YT921X_MDIO_POLLING_LINKf BIT(3) +#define YT921X_MDIO_POLLING_SPEEDf GENMASK(2, 0) +#define YT921X_MDIO_POLLING_SPEEDv(x) FIELD_PREP(YT921X_MDIO_POLLING_SPEEDf, (x)) +#define YT921X_MDIO_POLLING_SPEED_10v YT921X_MDIO_POLLING_SPEEDv(0) +#define YT921X_MDIO_POLLING_SPEED_100v YT921X_MDIO_POLLING_SPEEDv(1) +#define YT921X_MDIO_POLLING_SPEED_1000v YT921X_MDIO_POLLING_SPEEDv(2) +#define YT921X_MDIO_POLLING_SPEED_2500v YT921X_MDIO_POLLING_SPEEDv(4) +#define YT921X_CHIP_MODEm 0x80388 +#define YT921X_CHIP_MODE_MODEf GENMASK(1, 0) +#define YT921X_EXTIF_SELm 0x80394 +#define YT921X_EXTIF_SEL_EXTIFn_XMIIf(port) BIT(9 - (port)) /* Yes, it's reversed */ +#define YT921X_EXTIFn_MODEm(port) (0x80400 + 8 * ((port) - 8)) +#define YT921X_EXTIF_MODE_MODEf GENMASK(31, 29) +#define YT921X_EXTIF_MODE_MODEv(x) FIELD_PREP(YT921X_EXTIF_MODE_MODEf, (x)) +#define YT921X_EXTIF_MODE_MODE_MIIv YT921X_EXTIF_MODE_MODEv(0) +#define YT921X_EXTIF_MODE_MODE_REVMIIv YT921X_EXTIF_MODE_MODEv(1) +#define YT921X_EXTIF_MODE_MODE_RMIIv YT921X_EXTIF_MODE_MODEv(2) +#define YT921X_EXTIF_MODE_MODE_REVRMIIv YT921X_EXTIF_MODE_MODEv(3) +#define YT921X_EXTIF_MODE_MODE_RGMIIv YT921X_EXTIF_MODE_MODEv(4) +#define YT921X_EXTIF_MODE_MODE_DISABLEv YT921X_EXTIF_MODE_MODEv(5) +#define YT921X_EXTIF_MODE_PORT_ENf BIT(18) + +#define YT921X_MACn_JUMBOm(port) (0x81008 + 0x1000 * (port)) +#define YT921X_MAC_FRAME_SIZEf GENMASK(21, 8) +#define YT921X_MAC_FRAME_SIZEv(x) FIELD_PREP(YT921X_MAC_FRAME_SIZEf, (x)) + +#define YT921X_MACn_EEE_VALm(port) (0xa0000 + 4 * (port)) +#define YT921X_MAC_EEE_VAL_DATAf BIT(1) + +#define YT921X_MAC_EEE_CTRLm 0xb0000 +#define YT921X_MAC_EEE_CTRL_ENnf(port) BIT(port) + +#define YT921X_MIB_CTRLm 0xc0004 +#define YT921X_MIB_CTRL_CLEANf BIT(30) +#define YT921X_MIB_CTRL_PORTf GENMASK(6, 3) +#define YT921X_MIB_CTRL_PORTv(x) FIELD_PREP(YT921X_MIB_CTRL_PORTf, (x)) +#define YT921X_MIB_CTRL_ONE_PORTf BIT(1) +#define YT921X_MIB_CTRL_ALL_PORTf BIT(0) + +#define YT921X_MIBn_DATAnm(port, x) (0xc0100 + 0x100 * (port) + 4 * (x)) + +#define YT921X_EDATA_CTRLm 0xe0000 +#define YT921X_EDATA_CTRL_ADDRf GENMASK(15, 8) +#define YT921X_EDATA_CTRL_ADDRv(x) FIELD_PREP(YT921X_EDATA_CTRL_ADDRf, (x)) +#define YT921X_EDATA_CTRL_OPf GENMASK(3, 0) +#define YT921X_EDATA_CTRL_READv 5 +#define YT921X_EDATA_DATAm 0xe0004 +#define YT921X_EDATA_DATA_DATAf GENMASK(31, 24) +#define YT921X_EDATA_DATA_STATUSf GENMASK(3, 0) +#define YT921X_EDATA_DATA_IDLEv 3 + +#define YT921X_EXTIF_MDIO_OPm 0x6a000 +#define YT921X_INTIF_MDIO_OPm 0xf0000 +#define YT921X_IF_MDIO_OP_DOf BIT(0) +#define YT921X_EXTIF_MDIO_CTRLm 0x6a004 +#define YT921X_INTIF_MDIO_CTRLm 0xf0004 +#define YT921X_IF_MDIO_CTRL_PORTf GENMASK(25, 21) +#define YT921X_IF_MDIO_CTRL_PORTv(x) FIELD_PREP(YT921X_IF_MDIO_CTRL_PORTf, (x)) +#define YT921X_IF_MDIO_CTRL_REGf GENMASK(20, 16) +#define YT921X_IF_MDIO_CTRL_REGv(x) FIELD_PREP(YT921X_IF_MDIO_CTRL_REGf, (x)) +#define YT921X_IF_MDIO_CTRL_TYPEf GENMASK(11, 8) +#define YT921X_IF_MDIO_CTRL_TYPEv(x) FIELD_PREP(YT921X_IF_MDIO_CTRL_TYPEf, (x)) +#define YT921X_IF_MDIO_CTRL_TYPE_C22v YT921X_IF_MDIO_CTRL_TYPEv(4) +#define YT921X_IF_MDIO_CTRL_OPf GENMASK(3, 2) +#define YT921X_IF_MDIO_CTRL_OPv(x) FIELD_PREP(YT921X_IF_MDIO_CTRL_OPf, (x)) +#define YT921X_IF_MDIO_CTRL_WRITEv YT921X_IF_MDIO_CTRL_OPv(1) +#define YT921X_IF_MDIO_CTRL_READv YT921X_IF_MDIO_CTRL_OPv(2) +#define YT921X_EXTIF_MDIO_WRITE_DATAm 0x6a008 +#define YT921X_INTIF_MDIO_WRITE_DATAm 0xf0008 +#define YT921X_EXTIF_MDIO_READ_DATAm 0x6a00c +#define YT921X_INTIF_MDIO_READ_DATAm 0xf000c + +#define YT921X_EDATA_EXTMODEm 0xfb + +#define YT921X_FRAME_SIZE_MAX 0x2400 /* 9216 */ +#define YT921X_TAG_LEN 8 + +struct yt921x_mib_desc { + unsigned int size; + unsigned int offset; + const char *name; +}; + +#define MIB_DESC(_size, _offset, _name) {_size, _offset, _name} + +static const struct yt921x_mib_desc yt921x_mib_descs[] = { + MIB_DESC(1, 0x00, "RxBroadcast"), /* rx broadcast pkts */ + MIB_DESC(1, 0x04, "RxPause"), /* rx pause pkts */ + MIB_DESC(1, 0x08, "RxMulticast"), /* rx multicast pkts, excluding pause and OAM */ + MIB_DESC(1, 0x0c, "RxCrcErr"), /* rx crc err pkts, len >= 64B */ + + MIB_DESC(1, 0x10, "RxAlignErr"), /* rx pkts with odd number of bytes */ + MIB_DESC(1, 0x14, "RxUnderSizeErr"), /* rx crc ok pkts, len < 64B */ + MIB_DESC(1, 0x18, "RxFragErr"), /* rx crc err pkts, len < 64B */ + MIB_DESC(1, 0x1c, "RxPktSz64"), /* rx pkts, len == 64B */ + + MIB_DESC(1, 0x20, "RxPktSz65To127"), /* rx pkts, len >= 65B and <= 127B */ + MIB_DESC(1, 0x24, "RxPktSz128To255"), /* rx pkts, len >= 128B and <= 255B */ + MIB_DESC(1, 0x28, "RxPktSz256To511"), /* rx pkts, len >= 256B and <= 511B */ + MIB_DESC(1, 0x2c, "RxPktSz512To1023"), /* rx pkts, len >= 512B and <= 1023B */ + + MIB_DESC(1, 0x30, "RxPktSz1024To1518"), /* rx pkts, len >= 1024B and <= 1518B */ + MIB_DESC(1, 0x34, "RxPktSz1519ToMax"), /* rx pkts, len >= 1519B */ + MIB_DESC(2, 0x38, "RxGoodBytes"), /* total bytes of rx ok pkts */ + /* 0x3c */ + + MIB_DESC(2, 0x40, "RxBadBytes"), /* total bytes of rx err pkts */ + /* 0x44 */ + MIB_DESC(2, 0x48, "RxOverSzErr"), /* rx pkts, len > mac frame size */ + /* 0x4c */ + + MIB_DESC(1, 0x50, "RxDropped"), /* rx dropped pkts, excluding crc err and pause */ + MIB_DESC(1, 0x54, "TxBroadcast"), /* tx broadcast pkts */ + MIB_DESC(1, 0x58, "TxPause"), /* tx pause pkts */ + MIB_DESC(1, 0x5c, "TxMulticast"), /* tx multicast pkts, excluding pause and OAM */ + + MIB_DESC(1, 0x60, "TxUnderSizeErr"), /* tx pkts, len < 64B */ + MIB_DESC(1, 0x64, "TxPktSz64"), /* tx pkts, len == 64B */ + MIB_DESC(1, 0x68, "TxPktSz65To127"), /* tx pkts, len >= 65B and <= 127B */ + MIB_DESC(1, 0x6c, "TxPktSz128To255"), /* tx pkts, len >= 128B and <= 255B */ + + MIB_DESC(1, 0x70, "TxPktSz256To511"), /* tx pkts, len >= 256B and <= 511B */ + MIB_DESC(1, 0x74, "TxPktSz512To1023"), /* tx pkts, len >= 512B and <= 1023B */ + MIB_DESC(1, 0x78, "TxPktSz1024To1518"), /* tx pkts, len >= 1024B and <= 1518B */ + MIB_DESC(1, 0x7c, "TxPktSz1519ToMax"), /* tx pkts, len >= 1519B */ + + MIB_DESC(2, 0x80, "TxGoodBytes"), /* total bytes of tx ok pkts */ + /* 0x84 */ + MIB_DESC(2, 0x88, "TxCollision"), /* collisions before 64B */ + /* 0x8c */ + + MIB_DESC(1, 0x90, "TxExcessiveCollistion"), /* aborted pkts due to too many colls */ + MIB_DESC(1, 0x94, "TxMultipleCollision"), /* multiple collision for one mac */ + MIB_DESC(1, 0x98, "TxSingleCollision"), /* one collision for one mac */ + MIB_DESC(1, 0x9c, "TxPkt"), /* tx ok pkts */ + + MIB_DESC(1, 0xa0, "TxDeferred"), /* delayed pkts due to defer signal */ + MIB_DESC(1, 0xa4, "TxLateCollision"), /* collisions after 64B */ + MIB_DESC(1, 0xa8, "RxOAM"), /* rx OAM pkts */ + MIB_DESC(1, 0xac, "TxOAM"), /* tx OAM pkts */ +}; + +struct yt921x_mib_raw { + u32 rx_broadcast; + u32 rx_pause; + u32 rx_multicast; + u32 rx_crc_errors; + + u32 rx_frame_errors; + u32 rx_undersize_errors; + u32 rx_fragment_errors; + u32 rx_64byte; + + u32 rx_65_127byte; + u32 rx_128_255byte; + u32 rx_256_511byte; + u32 rx_512_1023byte; + + u32 rx_1024_1518byte; + u32 rx_jumbo; + u32 rx_good_bytes_hi; + u32 rx_good_bytes_lo; + + u32 rx_bad_bytes_hi; + u32 rx_bad_bytes_lo; + u32 rx_over_errors_hi; + u32 rx_over_errors_lo; + + u32 rx_dropped; + u32 tx_broadcast; + u32 tx_pause; + u32 tx_multicast; + + u32 tx_undersize_errors; + u32 tx_64byte; + u32 tx_65_127byte; + u32 tx_128_255byte; + + u32 tx_256_511byte; + u32 tx_512_1023byte; + u32 tx_1024_1518byte; + u32 tx_jumbo; + + u32 tx_good_bytes_hi; + u32 tx_good_bytes_lo; + u32 tx_collisions_hi; + u32 tx_collisions_lo; + + u32 tx_aborted_errors; + u32 tx_multiple_collisions; + u32 tx_single_collisions; + u32 tx_good; + + u32 tx_defer; + u32 tx_window_errors; + u32 rx_oam; + u32 tx_oam; +}; + +#define u64_from_u32(hi, lo) (((u64)(hi) << 32) | (lo)) + +struct yt921x_chip_info { + const char *name; + u16 id; + u8 mode; + u8 extmode; + u16 intif_mask; + u16 extif_mask; +}; + +static const struct yt921x_chip_info yt921x_chip_infos[] = { + { "YT9215SC", 0x9002, 1, 0, GENMASK(4, 0), BIT(8) | BIT(9), }, + { "YT9215S", 0x9002, 2, 0, GENMASK(4, 0), BIT(8), }, + { "YT9215RB", 0x9002, 3, 0, GENMASK(4, 0), BIT(8) | BIT(9), }, + { "YT9214NB", 0x9002, 3, 2, BIT(1) | BIT(3), BIT(8) | BIT(9), }, + { "YT9213NB", 0x9002, 3, 3, BIT(1) | BIT(3), BIT(9), }, + { "YT9218N", 0x9001, 0, 0, GENMASK(7, 0), 0, }, + { "YT9218MB", 0x9001, 1, 0, GENMASK(7, 0), BIT(8) | BIT(9), }, + {} +}; + +#define YT921X_INT_PORTS_NUM 8 +#define YT921X_EXT_PORTS_NUM 2 +/* 8 internal + 2 external + 1 mcu */ +#define YT921X_PORT_CTRLS_NUM 11 + +/******** driver definitions ********/ + +#define YT921X_MDIO_SLEEP_US 10000 +#define YT921X_MDIO_TIMEOUT_US 100000 +#define YT921X_RESET_TIMEOUT_US 100000 + +enum yt921x_speed { + YT921X_SPEED_AN = 0, + YT921X_SPEED_10, + YT921X_SPEED_100, + YT921X_SPEED_1000, + YT921X_SPEED_2500, +}; + +struct yt921x_smi_ops { + int (*acquire)(void *context); + void (*release)(void *context); + int (*read)(void *context, u32 reg, u32 *valp); + int (*write)(void *context, u32 reg, u32 val); +}; + +struct yt921x_smi_mdio { + struct mii_bus *bus; + int addr; + unsigned char switchid; +}; + +/* TODO: SPI/I2C */ + +struct yt921x_port { + struct yt921x_mib_raw mib; +}; + +struct yt921x_priv { + struct device *dev; + const struct yt921x_chip_info *info; + u32 pon_strap_cap; + u16 tag_eth_p; + + const struct yt921x_smi_ops *smi_ops; + void *smi_ctx; + + /* mdio master */ + struct mii_bus *mbus_int; + struct mii_bus *mbus_ext; + + struct dsa_switch ds; + + struct yt921x_port ports[YT921X_PORT_CTRLS_NUM]; + + u16 eee_ports_mask; +}; + +/******** smi ********/ + +static int yt921x_smi_acquire(struct yt921x_priv *priv) +{ + if (priv->smi_ops->acquire) + return priv->smi_ops->acquire(priv->smi_ctx); + return 0; +} + +static void yt921x_smi_release(struct yt921x_priv *priv) +{ + if (priv->smi_ops->release) + priv->smi_ops->release(priv->smi_ctx); +} + +static int +__yt921x_smi_read(struct yt921x_priv *priv, u32 reg, u32 *valp) +{ + return priv->smi_ops->read(priv->smi_ctx, reg, valp); +} + +static int yt921x_smi_read(struct yt921x_priv *priv, u32 reg, u32 *valp) +{ + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_read(priv, reg, valp); + yt921x_smi_release(priv); + + return res; +} + +static int +__yt921x_smi_write(struct yt921x_priv *priv, u32 reg, u32 val) +{ + return priv->smi_ops->write(priv->smi_ctx, reg, val); +} + +static int yt921x_smi_write(struct yt921x_priv *priv, u32 reg, u32 val) +{ + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_write(priv, reg, val); + yt921x_smi_release(priv); + + return res; +} + +static int +__yt921x_smi_update_bits(struct yt921x_priv *priv, u32 reg, u32 mask, u32 val) +{ + u32 v; + int res; + + res = __yt921x_smi_read(priv, reg, &v); + if (unlikely(res != 0)) + return res; + v &= ~mask; + v |= val; + return __yt921x_smi_write(priv, reg, v); +} + +static int +yt921x_smi_update_bits(struct yt921x_priv *priv, u32 reg, u32 mask, u32 val) +{ + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_update_bits(priv, reg, mask, val); + yt921x_smi_release(priv); + + return res; +} + +static int __yt921x_smi_set_bits(struct yt921x_priv *priv, u32 reg, u32 mask) +{ + return __yt921x_smi_update_bits(priv, reg, 0, mask); +} + +static int yt921x_smi_set_bits(struct yt921x_priv *priv, u32 reg, u32 mask) +{ + return yt921x_smi_update_bits(priv, reg, 0, mask); +} + +static int __yt921x_smi_clear_bits(struct yt921x_priv *priv, u32 reg, u32 mask) +{ + return __yt921x_smi_update_bits(priv, reg, mask, 0); +} + +static int yt921x_smi_clear_bits(struct yt921x_priv *priv, u32 reg, u32 mask) +{ + return yt921x_smi_update_bits(priv, reg, mask, 0); +} + +static int +__yt921x_smi_toggle_bits(struct yt921x_priv *priv, u32 reg, u32 mask, bool set) +{ + return __yt921x_smi_update_bits(priv, reg, mask, !set ? 0 : mask); +} + +/******** smi via mdio ********/ + +static int yt921x_smi_mdio_acquire(void *context) +{ + struct yt921x_smi_mdio *mdio = context; + struct mii_bus *bus = mdio->bus; + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + return 0; +} + +static void yt921x_smi_mdio_release(void *context) +{ + struct yt921x_smi_mdio *mdio = context; + struct mii_bus *bus = mdio->bus; + + mutex_unlock(&bus->mdio_lock); +} + +static int yt921x_smi_mdio_read(void *context, u32 reg, u32 *valp) +{ + struct yt921x_smi_mdio *mdio = context; + struct mii_bus *bus = mdio->bus; + int addr = mdio->addr; + u32 reg_addr = YT921X_SMI_SWITCHIDv(mdio->switchid) | + YT921X_SMI_ADDRv | YT921X_SMI_READv; + u32 reg_data = YT921X_SMI_SWITCHIDv(mdio->switchid) | + YT921X_SMI_DATAv | YT921X_SMI_READv; + u32 val; + int res; + + res = __mdiobus_write(bus, addr, reg_addr, (reg >> 16) & 0xffff); + if (unlikely(res != 0)) + return res; + res = __mdiobus_write(bus, addr, reg_addr, (reg >> 0) & 0xffff); + if (unlikely(res != 0)) + return res; + + res = __mdiobus_read(bus, addr, reg_data); + if (unlikely(res < 0)) + return res; + val = res & 0xffff; + res = __mdiobus_read(bus, addr, reg_data); + if (unlikely(res < 0)) + return res; + val = (val << 16) | (res & 0xffff); + + *valp = val; + return 0; +} + +static int yt921x_smi_mdio_write(void *context, u32 reg, u32 val) +{ + struct yt921x_smi_mdio *mdio = context; + struct mii_bus *bus = mdio->bus; + int addr = mdio->addr; + u32 reg_addr = YT921X_SMI_SWITCHIDv(mdio->switchid) | + YT921X_SMI_ADDRv | YT921X_SMI_WRITEv; + u32 reg_data = YT921X_SMI_SWITCHIDv(mdio->switchid) | + YT921X_SMI_DATAv | YT921X_SMI_WRITEv; + int res; + + res = __mdiobus_write(bus, addr, reg_addr, (reg >> 16) & 0xffff); + if (unlikely(res != 0)) + return res; + res = __mdiobus_write(bus, addr, reg_addr, (reg >> 0) & 0xffff); + if (unlikely(res != 0)) + return res; + + res = __mdiobus_write(bus, addr, reg_data, (val >> 16) & 0xffff); + if (unlikely(res != 0)) + return res; + res = __mdiobus_write(bus, addr, reg_data, (val >> 0) & 0xffff); + if (unlikely(res != 0)) + return res; + + return 0; +} + +static const struct yt921x_smi_ops yt921x_smi_ops_mdio = { + .acquire = yt921x_smi_mdio_acquire, + .release = yt921x_smi_mdio_release, + .read = yt921x_smi_mdio_read, + .write = yt921x_smi_mdio_write, +}; + +/* TODO: SPI/I2C */ + +/******** edata ********/ + +static int __yt921x_edata_out(struct yt921x_priv *priv, u32 *valp) +{ + u32 val; + int res; + + res = __yt921x_smi_read(priv, YT921X_EDATA_DATAm, &val); + if (unlikely(res != 0)) + return res; + if ((val & YT921X_EDATA_DATA_STATUSf) != YT921X_EDATA_DATA_IDLEv) { + int res2; + + yt921x_smi_release(priv); + res = read_poll_timeout(yt921x_smi_read, res, + (val & YT921X_EDATA_DATA_STATUSf) == + YT921X_EDATA_DATA_IDLEv, + YT921X_MDIO_SLEEP_US, + YT921X_MDIO_TIMEOUT_US, + true, priv, YT921X_EDATA_DATAm, &val); + res2 = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + if (unlikely(res2 != 0)) + return res2; + } + + *valp = val; + return 0; +} + +static int __yt921x_edata_read(struct yt921x_priv *priv, u8 addr, u8 *valp) +{ + u32 ctrl = YT921X_EDATA_CTRL_ADDRv(addr) | YT921X_EDATA_CTRL_READv; + u32 val; + int res; + + res = __yt921x_edata_out(priv, &val); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_write(priv, YT921X_EDATA_CTRLm, ctrl); + if (unlikely(res != 0)) + return res; + res = __yt921x_edata_out(priv, &val); + if (unlikely(res != 0)) + return res; + + *valp = FIELD_GET(YT921X_EDATA_DATA_DATAf, val); + return 0; +} + +/******** internal interface mdio ********/ + +static int __yt921x_intif_wait(struct yt921x_priv *priv) +{ + u32 val; + int res; + + res = __yt921x_smi_read(priv, YT921X_INTIF_MDIO_OPm, &val); + if (unlikely(res != 0)) + return res; + if ((val & YT921X_IF_MDIO_OP_DOf) != 0) { + int res2; + + yt921x_smi_release(priv); + res = read_poll_timeout(yt921x_smi_read, res, + (val & YT921X_IF_MDIO_OP_DOf) == 0, + YT921X_MDIO_SLEEP_US, + YT921X_MDIO_TIMEOUT_US, + true, priv, YT921X_INTIF_MDIO_OPm, + &val); + res2 = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + if (unlikely(res2 != 0)) + return res2; + } + + return 0; +} + +static int +__yt921x_intif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp) +{ + struct device *dev = priv->dev; + + u32 mask = YT921X_IF_MDIO_CTRL_PORTf | YT921X_IF_MDIO_CTRL_REGf | + YT921X_IF_MDIO_CTRL_OPf; + u32 ctrl = YT921X_IF_MDIO_CTRL_PORTv(port) | + YT921X_IF_MDIO_CTRL_REGv(reg) | + YT921X_IF_MDIO_CTRL_READv; + + u32 val; + int res; + + res = __yt921x_intif_wait(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_update_bits(priv, YT921X_INTIF_MDIO_CTRLm, mask, + ctrl); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_write(priv, YT921X_INTIF_MDIO_OPm, + YT921X_IF_MDIO_OP_DOf); + if (unlikely(res != 0)) + return res; + res = __yt921x_intif_wait(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_read(priv, YT921X_INTIF_MDIO_READ_DATAm, &val); + if (unlikely(res != 0)) + return res; + + if (unlikely((u16)val != val)) + dev_err(dev, "%s: Expected u16, got 0x%08x\n", __func__, val); + *valp = (u16)val; + return 0; +} + +static int +yt921x_intif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp) +{ + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_intif_read(priv, port, reg, valp); + yt921x_smi_release(priv); + return res; +} + +static int +__yt921x_intif_write(struct yt921x_priv *priv, int port, int reg, u16 val) +{ + u32 mask = YT921X_IF_MDIO_CTRL_PORTf | YT921X_IF_MDIO_CTRL_REGf | + YT921X_IF_MDIO_CTRL_OPf; + u32 ctrl = YT921X_IF_MDIO_CTRL_PORTv(port) | + YT921X_IF_MDIO_CTRL_REGv(reg) | + YT921X_IF_MDIO_CTRL_WRITEv; + int res; + + res = __yt921x_intif_wait(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_update_bits(priv, YT921X_INTIF_MDIO_CTRLm, mask, + ctrl); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_write(priv, YT921X_INTIF_MDIO_WRITE_DATAm, val); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_write(priv, YT921X_INTIF_MDIO_OPm, + YT921X_IF_MDIO_OP_DOf); + if (unlikely(res != 0)) + return res; + return __yt921x_intif_wait(priv); +} + +static int +yt921x_intif_write(struct yt921x_priv *priv, int port, int reg, u16 val) +{ + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_intif_write(priv, port, reg, val); + yt921x_smi_release(priv); + return res; +} + +static int yt921x_mbus_int_read(struct mii_bus *mbus, int port, int reg) +{ + struct yt921x_priv *priv = mbus->priv; + u16 val; + int res; + + res = yt921x_intif_read(priv, port, reg, &val); + if (unlikely(res != 0)) + return res; + return val; +} + +static int +yt921x_mbus_int_write(struct mii_bus *mbus, int port, int reg, u16 data) +{ + struct yt921x_priv *priv = mbus->priv; + + return yt921x_intif_write(priv, port, reg, data); +} + +static int +yt921x_mbus_int_init(struct yt921x_priv *priv, struct device_node *mnp) +{ + struct device *dev = priv->dev; + struct mii_bus *mbus; + int res; + + mbus = devm_mdiobus_alloc(dev); + if (unlikely(!mbus)) + return -ENOMEM; + + mbus->name = "YT921x internal MDIO bus"; + snprintf(mbus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev)); + mbus->priv = priv; + mbus->read = yt921x_mbus_int_read; + mbus->write = yt921x_mbus_int_write; + mbus->parent = dev; + mbus->phy_mask = (u32)~GENMASK(YT921X_PORT_CTRLS_NUM - 1, 0); + + if (!mnp) + res = devm_mdiobus_register(dev, mbus); + else + res = devm_of_mdiobus_register(dev, mbus, mnp); + if (unlikely(res != 0)) + return res; + + priv->mbus_int = mbus; + + return 0; +} + +/******** external interface mdio ********/ + +static int __yt921x_extif_wait(struct yt921x_priv *priv) +{ + u32 val; + int res; + + res = __yt921x_smi_read(priv, YT921X_EXTIF_MDIO_OPm, &val); + if (unlikely(res != 0)) + return res; + if ((val & YT921X_IF_MDIO_OP_DOf) != 0) { + int res2; + + yt921x_smi_release(priv); + res = read_poll_timeout(yt921x_smi_read, res, + (val & YT921X_IF_MDIO_OP_DOf) == 0, + YT921X_MDIO_SLEEP_US, + YT921X_MDIO_TIMEOUT_US, + true, priv, YT921X_EXTIF_MDIO_OPm, + &val); + res2 = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + if (unlikely(res2 != 0)) + return res2; + } + + return 0; +} + +static int +__yt921x_extif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp) +{ + struct device *dev = priv->dev; + + u32 mask = YT921X_IF_MDIO_CTRL_PORTf | YT921X_IF_MDIO_CTRL_REGf | + YT921X_IF_MDIO_CTRL_TYPEf | YT921X_IF_MDIO_CTRL_OPf; + u32 ctrl = YT921X_IF_MDIO_CTRL_PORTv(port) | + YT921X_IF_MDIO_CTRL_REGv(reg) | + YT921X_IF_MDIO_CTRL_TYPE_C22v | YT921X_IF_MDIO_CTRL_READv; + + u32 val; + int res; + + res = __yt921x_extif_wait(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_update_bits(priv, YT921X_EXTIF_MDIO_CTRLm, mask, + ctrl); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_write(priv, YT921X_EXTIF_MDIO_OPm, + YT921X_IF_MDIO_OP_DOf); + if (unlikely(res != 0)) + return res; + res = __yt921x_extif_wait(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_read(priv, YT921X_EXTIF_MDIO_READ_DATAm, &val); + if (unlikely(res != 0)) + return res; + + if (unlikely((u16)val != val)) + dev_err(dev, "%s: Expected u16, got 0x%08x\n", __func__, val); + *valp = (u16)val; + return 0; +} + +static int +yt921x_extif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp) +{ + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_extif_read(priv, port, reg, valp); + yt921x_smi_release(priv); + return res; +} + +static int +__yt921x_extif_write(struct yt921x_priv *priv, int port, int reg, u16 val) +{ + u32 mask = YT921X_IF_MDIO_CTRL_PORTf | YT921X_IF_MDIO_CTRL_REGf | + YT921X_IF_MDIO_CTRL_TYPEf | YT921X_IF_MDIO_CTRL_OPf; + u32 ctrl = YT921X_IF_MDIO_CTRL_PORTv(port) | + YT921X_IF_MDIO_CTRL_REGv(reg) | + YT921X_IF_MDIO_CTRL_TYPE_C22v | YT921X_IF_MDIO_CTRL_WRITEv; + int res; + + res = __yt921x_extif_wait(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_update_bits(priv, YT921X_EXTIF_MDIO_CTRLm, mask, + ctrl); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_write(priv, YT921X_EXTIF_MDIO_WRITE_DATAm, val); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_write(priv, YT921X_EXTIF_MDIO_OPm, + YT921X_IF_MDIO_OP_DOf); + if (unlikely(res != 0)) + return res; + return __yt921x_extif_wait(priv); +} + +static int +yt921x_extif_write(struct yt921x_priv *priv, int port, int reg, u16 val) +{ + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_extif_write(priv, port, reg, val); + yt921x_smi_release(priv); + return res; +} + +static int yt921x_mbus_ext_read(struct mii_bus *mbus, int port, int reg) +{ + struct yt921x_priv *priv = mbus->priv; + u16 val; + int res; + + res = yt921x_extif_read(priv, port, reg, &val); + if (unlikely(res != 0)) + return res; + return val; +} + +static int +yt921x_mbus_ext_write(struct mii_bus *mbus, int port, int reg, u16 data) +{ + struct yt921x_priv *priv = mbus->priv; + + return yt921x_extif_write(priv, port, reg, data); +} + +static int +yt921x_mbus_ext_init(struct yt921x_priv *priv, struct device_node *mnp) +{ + struct device *dev = priv->dev; + struct mii_bus *mbus; + int res; + + mbus = devm_mdiobus_alloc(dev); + if (unlikely(!mbus)) + return -ENOMEM; + + mbus->name = "YT921x external MDIO bus"; + snprintf(mbus->id, MII_BUS_ID_SIZE, "%s-ext", dev_name(dev)); + mbus->priv = priv; + mbus->read = yt921x_mbus_ext_read; + mbus->write = yt921x_mbus_ext_write; + mbus->parent = dev; + mbus->phy_mask = (u32)~GENMASK(9, 8); + + if (!mnp) + res = devm_mdiobus_register(dev, mbus); + else + res = devm_of_mdiobus_register(dev, mbus, mnp); + if (unlikely(res != 0)) + return res; + + priv->mbus_ext = mbus; + + return 0; +} + +/******** dsa ********/ + +static enum dsa_tag_protocol +yt921x_dsa_get_tag_protocol(struct dsa_switch *ds, int port, + enum dsa_tag_protocol m) +{ + return DSA_TAG_PROTO_YT921X; +} + +static int yt921x_dsa_cpu_port(struct dsa_switch *ds, int *portp) +{ + struct yt921x_priv *priv = ds->priv; + struct device *dev = priv->dev; + struct dsa_port *cpu_dp; + int port = -1; + + dsa_switch_for_each_cpu_port(cpu_dp, ds) { + if (unlikely(port >= 0)) { + dev_warn(dev, "More than one CPU port, %d and %d\n", + port, cpu_dp->index); + continue; + } + port = cpu_dp->index; + } + + if (unlikely(port < 0)) { + dev_err(dev, "No CPU port\n"); + return -EINVAL; + } + + *portp = port; + return 0; +} + +static int yt921x_detect(struct yt921x_priv *priv) +{ + struct device *dev = priv->dev; + + const struct yt921x_chip_info *info; + u32 chipid; + u32 id; + u32 mode; + u8 extmode; + + int res; + + res = yt921x_smi_read(priv, YT921X_CHIP_IDm, &chipid); + if (unlikely(res != 0)) + return res; + + id = FIELD_GET(YT921X_CHIP_ID_IDf, chipid); + + for (info = yt921x_chip_infos; info->name; info++) + if (info->id == id) + goto found_id; + + dev_err(dev, "Unexpected chipid 0x%x\n", chipid); + return -ENODEV; + +found_id: + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + do { + res = __yt921x_smi_read(priv, YT921X_CHIP_MODEm, &mode); + if (unlikely(res != 0)) + break; + res = __yt921x_edata_read(priv, YT921X_EDATA_EXTMODEm, + &extmode); + } while (0); + yt921x_smi_release(priv); + if (unlikely(res != 0)) + return res; + + for (; info->name; info++) + if (info->id == id && info->mode == mode && + info->extmode == extmode) + goto found_chip; + + dev_err(dev, "Unexpected chipid 0x%x chipmode 0x%x 0x%x\n", + chipid, mode, extmode); + return -ENODEV; + +found_chip: + dev_info(dev, + "Motorcomm %s switch, chipid: 0x%x, chipmode: 0x%x 0x%x\n", + info->name, chipid, mode, extmode); + + res = yt921x_smi_read(priv, YT921X_PON_STRAP_CAPm, + &priv->pon_strap_cap); + if (unlikely(res != 0)) + return res; + + priv->info = info; + return 0; +} + +static int yt921x_dsa_setup(struct dsa_switch *ds) +{ + struct yt921x_priv *priv = ds->priv; + struct device *dev = priv->dev; + struct device_node *np = dev->of_node; + + struct device_node *child; + int cpu_port; + u32 val; + int res; + + res = yt921x_dsa_cpu_port(ds, &cpu_port); + if (unlikely(res != 0)) + return res; + + res = yt921x_detect(priv); + if (unlikely(res != 0)) + return res; + + /* Reset */ + res = yt921x_smi_write(priv, YT921X_RESETm, YT921X_RESET_HWf); + if (unlikely(res != 0)) + return res; + + /* YT921X_RESET_HWf is almost same as GPIO hard reset. So we need + * this delay. + */ + usleep_range(10000, 15000); + + res = read_poll_timeout(yt921x_smi_read, res, val == 0, + YT921X_MDIO_SLEEP_US, YT921X_RESET_TIMEOUT_US, + false, priv, YT921X_RESETm, &val); + if (unlikely(res != 0)) { + dev_err(dev, "Reset timeout\n"); + return res; + } + + /* Always register one mdio bus for the internal/default mdio bus. This + * maybe represented in the device tree, but is optional. + */ + child = of_get_child_by_name(np, "mdio"); + res = yt921x_mbus_int_init(priv, child); + of_node_put(child); + if (unlikely(res != 0)) + return res; + ds->user_mii_bus = priv->mbus_int; + + /* Walk the device tree, and see if there are any other nodes which say + * they are compatible with the external mdio bus. + */ + priv->mbus_ext = NULL; + for_each_available_child_of_node(np, child) { + if (!of_device_is_compatible(child, + "motorcomm,yt921x-mdio-external")) + continue; + + res = yt921x_mbus_ext_init(priv, child); + if (unlikely(res != 0)) { + of_node_put(child); + return res; + } + break; + } + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + do { + /* Enable DSA */ + val = YT921X_EXT_CPU_PORT_TAG_ENf | + YT921X_EXT_CPU_PORT_PORT_ENf | + YT921X_EXT_CPU_PORT_PORTv(cpu_port); + res = __yt921x_smi_write(priv, YT921X_EXT_CPU_PORTm, val); + if (unlikely(res != 0)) + break; + + res = __yt921x_smi_read(priv, YT921X_CPU_TAG_TPIDm, &val); + if (unlikely(res != 0)) + break; + priv->tag_eth_p = FIELD_GET(YT921X_CPU_TAG_TPID_TPIDf, val); + if (priv->tag_eth_p != YT921X_CPU_TAG_TPID_TPIDv) { + dev_warn(dev, "Tag type 0x%x != 0x%x\n", + priv->tag_eth_p, YT921X_CPU_TAG_TPID_TPIDv); + /* Should we pass tag_eth_p to yt921x_xmit()? + * Nah, just enforce a fixed value for now. + */ + res = -EINVAL; + break; + } + + /* Enable MIB */ + res = __yt921x_smi_set_bits(priv, YT921X_FUNCm, + YT921X_FUNC_MIBf); + if (unlikely(res != 0)) + break; + + val = YT921X_MIB_CTRL_CLEANf | YT921X_MIB_CTRL_ALL_PORTf; + res = __yt921x_smi_write(priv, YT921X_MIB_CTRLm, val); + } while (0); + yt921x_smi_release(priv); + if (unlikely(res != 0)) + return res; + + return 0; +} + +static int yt921x_dsa_get_eeprom_len(struct dsa_switch *ds) +{ + return 0x100; +} + +static int +__yt921x_dsa_get_eeprom(struct dsa_switch *ds, struct ethtool_eeprom *eeprom, + u8 *data) +{ + struct yt921x_priv *priv = ds->priv; + unsigned int i; + int res = 0; + + for (i = 0; i < eeprom->len; i++) { + res = __yt921x_edata_read(priv, eeprom->offset + i, &data[i]); + if (unlikely(res != 0)) + break; + } + + eeprom->len = i; + return res; +} + +static int +yt921x_dsa_get_eeprom(struct dsa_switch *ds, struct ethtool_eeprom *eeprom, + u8 *data) +{ + struct yt921x_priv *priv = ds->priv; + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_dsa_get_eeprom(ds, eeprom, data); + yt921x_smi_release(priv); + return res; +} + +static bool yt921x_dsa_support_eee(struct dsa_switch *ds, int port) +{ + struct yt921x_priv *priv = ds->priv; + + return (priv->pon_strap_cap & YT921X_PON_STRAP_EEEf) != 0; +} + +static int +__yt921x_dsa_set_mac_eee(struct dsa_switch *ds, int port, + struct ethtool_keee *e) +{ + struct yt921x_priv *priv = ds->priv; + struct device *dev = priv->dev; + bool enable = e->eee_enabled; + u16 new_mask; + int res; + + dev_dbg(dev, "%s: port %d, enable %d\n", __func__, port, enable); + + /* Enable / disable global EEE */ + new_mask = priv->eee_ports_mask; + new_mask &= ~BIT(port); + new_mask |= !enable ? 0 : BIT(port); + + if (!!new_mask != !!priv->eee_ports_mask) { + dev_dbg(dev, "%s: toggle %d\n", __func__, !!new_mask); + + res = __yt921x_smi_toggle_bits(priv, YT921X_PON_STRAP_FUNCm, + YT921X_PON_STRAP_EEEf, + !!new_mask); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_toggle_bits(priv, YT921X_PON_STRAP_VALm, + YT921X_PON_STRAP_EEEf, + !!new_mask); + if (unlikely(res != 0)) + return res; + } + + priv->eee_ports_mask = new_mask; + + /* Enable / disable port EEE */ + res = __yt921x_smi_toggle_bits(priv, YT921X_MAC_EEE_CTRLm, + YT921X_MAC_EEE_CTRL_ENnf(port), enable); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_toggle_bits(priv, YT921X_MACn_EEE_VALm(port), + YT921X_MAC_EEE_VAL_DATAf, enable); + if (unlikely(res != 0)) + return res; + + return 0; +} + +static int +yt921x_dsa_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_keee *e) +{ + struct yt921x_priv *priv = ds->priv; + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + res = __yt921x_dsa_set_mac_eee(ds, port, e); + yt921x_smi_release(priv); + + return res; +} + +static int +yt921x_dsa_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu) +{ + /* Could be nop at all, since the default frame size is always set to + * maximum after reset, but let's implement it anyway + */ + + struct yt921x_priv *priv = ds->priv; + struct device *dev = priv->dev; + int frame_size; + + frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN; + if (dsa_is_cpu_port(ds, port)) + frame_size += YT921X_TAG_LEN; + + dev_dbg(dev, "%s: port %d, mtu %d, frame size %d\n", __func__, + port, new_mtu, frame_size); + + return yt921x_smi_update_bits(priv, YT921X_MACn_JUMBOm(port), + YT921X_MAC_FRAME_SIZEf, + YT921X_MAC_FRAME_SIZEv(frame_size)); +} + +static int yt921x_dsa_port_max_mtu(struct dsa_switch *ds, int port) +{ + /* Don't want to brother dsa_is_cpu_port() here, so use a fixed value */ + return YT921X_FRAME_SIZE_MAX - ETH_HLEN - ETH_FCS_LEN - YT921X_TAG_LEN; +} + +static void +yt921x_dsa_get_strings(struct dsa_switch *ds, int port, u32 stringset, + uint8_t *data) +{ + if (stringset != ETH_SS_STATS) + return; + + for (size_t i = 0; i < ARRAY_SIZE(yt921x_mib_descs); i++) + ethtool_puts(&data, yt921x_mib_descs[i].name); +} + +static int yt921x_mib_read(struct yt921x_priv *priv, int port, void *data) +{ + struct device *dev = priv->dev; + u32 *buf = data; + int res; + + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + return res; + for (size_t i = 0; i < sizeof(struct yt921x_mib_raw) / sizeof(u32); + i++) { + res = __yt921x_smi_read(priv, YT921X_MIBn_DATAnm(port, i), + &buf[i]); + if (unlikely(res != 0)) { + dev_err(dev, "Cannot read MIB %d at 0x%zx: %i\n", + port, sizeof(u32) * i, res); + break; + } + } + yt921x_smi_release(priv); + return res; +} + +static int yt921x_read_mib(struct yt921x_priv *priv, int port) +{ + struct device *dev = priv->dev; + int res; + + res = yt921x_mib_read(priv, port, &priv->ports[port].mib); + if (unlikely(res != 0)) + dev_err(dev, "Cannot read MIB %d: %i\n", port, res); + + return res; +} + +static void +yt921x_dsa_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data) +{ + struct yt921x_priv *priv = ds->priv; + unsigned char *buf = (unsigned char *)&priv->ports[port].mib; + + yt921x_read_mib(priv, port); + + for (size_t i = 0; i < ARRAY_SIZE(yt921x_mib_descs); i++) { + const struct yt921x_mib_desc *desc = &yt921x_mib_descs[i]; + u32 *valp = (u32 *)(buf + desc->offset); + + data[i] = valp[0]; + if (desc->size > 1) { + data[i] <<= 32; + data[i] |= valp[1]; + } + } +} + +static int yt921x_dsa_get_sset_count(struct dsa_switch *ds, int port, int sset) +{ + if (sset != ETH_SS_STATS) + return 0; + + return ARRAY_SIZE(yt921x_mib_descs); +} + +static void +yt921x_dsa_get_stats64(struct dsa_switch *ds, int port, + struct rtnl_link_stats64 *s) +{ + struct yt921x_priv *priv = ds->priv; + struct yt921x_mib_raw *mib = &priv->ports[port].mib; + + yt921x_read_mib(priv, port); + + s->rx_length_errors = (u64)mib->rx_undersize_errors + + mib->rx_fragment_errors; + s->rx_over_errors = u64_from_u32(mib->rx_over_errors_hi, + mib->rx_over_errors_lo); + s->rx_crc_errors = mib->rx_crc_errors; + s->rx_frame_errors = mib->rx_frame_errors; + /* s->rx_fifo_errors */ + /* s->rx_missed_errors */ + + s->tx_aborted_errors = mib->tx_aborted_errors; + /* s->tx_carrier_errors */ + s->tx_fifo_errors = mib->tx_undersize_errors; + /* s->tx_heartbeat_errors */ + s->tx_window_errors = mib->tx_window_errors; + + s->rx_packets = (u64)mib->rx_64byte + mib->rx_65_127byte + + mib->rx_128_255byte + mib->rx_256_511byte + + mib->rx_512_1023byte + mib->rx_1024_1518byte + + mib->rx_jumbo; + s->tx_packets = (u64)mib->tx_64byte + mib->tx_65_127byte + + mib->tx_128_255byte + mib->tx_256_511byte + + mib->tx_512_1023byte + mib->tx_1024_1518byte + + mib->tx_jumbo; + s->rx_bytes = u64_from_u32(mib->rx_good_bytes_hi, mib->rx_good_bytes_lo) - + ETH_FCS_LEN * s->rx_packets; + s->tx_bytes = u64_from_u32(mib->tx_good_bytes_hi, mib->tx_good_bytes_lo) - + ETH_FCS_LEN * s->tx_packets; + s->rx_errors = (u64)mib->rx_crc_errors + s->rx_length_errors + + s->rx_over_errors; + s->tx_errors = (u64)mib->tx_undersize_errors + mib->tx_aborted_errors + + mib->tx_window_errors; + s->rx_dropped = mib->rx_dropped; + /* s->tx_dropped */ + s->multicast = mib->rx_multicast; + s->collisions = u64_from_u32(mib->tx_collisions_hi, + mib->tx_collisions_lo); +} + +static void +yt921x_dsa_get_pause_stats(struct dsa_switch *ds, int port, + struct ethtool_pause_stats *pause_stats) +{ + struct yt921x_priv *priv = ds->priv; + struct yt921x_mib_raw *mib = &priv->ports[port].mib; + + yt921x_read_mib(priv, port); + + pause_stats->tx_pause_frames = mib->tx_pause; + pause_stats->rx_pause_frames = mib->rx_pause; +} + +static void +yt921x_dsa_phylink_get_caps(struct dsa_switch *ds, int port, + struct phylink_config *config) +{ + struct yt921x_priv *priv = ds->priv; + const struct yt921x_chip_info *info = priv->info; + + if ((BIT(port) & info->intif_mask) != 0) { + __set_bit(PHY_INTERFACE_MODE_INTERNAL, + config->supported_interfaces); + config->mac_capabilities = 0; + } else if ((BIT(port) & info->extif_mask) != 0) { + /* SGMII */ + __set_bit(PHY_INTERFACE_MODE_SGMII, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_100BASEX, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_1000BASEX, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_2500BASEX, + config->supported_interfaces); + /* XMII */ + __set_bit(PHY_INTERFACE_MODE_MII, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_REVMII, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_RMII, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_REVRMII, + config->supported_interfaces); + phy_interface_set_rgmii(config->supported_interfaces); + config->mac_capabilities = MAC_2500FD; + } else { + return; + } + + config->mac_capabilities |= MAC_ASYM_PAUSE | MAC_SYM_PAUSE | + MAC_10 | MAC_100 | MAC_1000; +} + +static const struct dsa_switch_ops yt921x_dsa_switch_ops = { + .get_tag_protocol = yt921x_dsa_get_tag_protocol, + .setup = yt921x_dsa_setup, + .get_eeprom_len = yt921x_dsa_get_eeprom_len, + .get_eeprom = yt921x_dsa_get_eeprom, + .support_eee = yt921x_dsa_support_eee, + .set_mac_eee = yt921x_dsa_set_mac_eee, + .port_change_mtu = yt921x_dsa_port_change_mtu, + .port_max_mtu = yt921x_dsa_port_max_mtu, + .get_strings = yt921x_dsa_get_strings, + .get_ethtool_stats = yt921x_dsa_get_ethtool_stats, + .get_sset_count = yt921x_dsa_get_sset_count, + .get_stats64 = yt921x_dsa_get_stats64, + .get_pause_stats = yt921x_dsa_get_pause_stats, + .phylink_get_caps = yt921x_dsa_phylink_get_caps, +}; + +static int +__yt921x_port_config(struct yt921x_priv *priv, int port, unsigned int mode, + const struct phylink_link_state *state) +{ + const struct yt921x_chip_info *info = priv->info; + struct device *dev = priv->dev; + enum yt921x_speed speed; + bool duplex_full; + u32 val; + u32 mask; + int res; + + speed = YT921X_SPEED_AN; + val = YT921X_PORT_LINKf; + if (mode == MLO_AN_FIXED) + switch (state->speed) { + case 10: + speed = YT921X_SPEED_10; + val = YT921X_PORT_SPEED_10v; + break; + case 100: + speed = YT921X_SPEED_100; + val = YT921X_PORT_SPEED_100v; + break; + case 1000: + speed = YT921X_SPEED_1000; + val = YT921X_PORT_SPEED_1000v; + break; + case 2500: + speed = YT921X_SPEED_2500; + val = YT921X_PORT_SPEED_2500v; + break; + default: + if (unlikely(state->speed >= 0)) + dev_err(dev, "Unsupported speed %d\n", + state->speed); + break; + } + + if (speed != YT921X_SPEED_AN) { + switch (state->duplex) { + case DUPLEX_FULL: + duplex_full = true; + val |= YT921X_PORT_DUPLEX_FULLf; + break; + case DUPLEX_HALF: + duplex_full = false; + break; + default: + dev_err(dev, + "Unspecified duplex while fixed speed %d\n", + state->speed); + duplex_full = true; + break; + } + } + + if ((state->pause & MLO_PAUSE_RX) != 0) + val |= YT921X_PORT_RX_FLOW_CONTROLf; + if ((state->pause & MLO_PAUSE_TX) != 0) + val |= YT921X_PORT_TX_FLOW_CONTROLf; + if ((state->pause & MLO_PAUSE_AN) != 0) + val |= YT921X_PORT_CTRL_FLOW_CONTROL_ANf; + + res = __yt921x_smi_write(priv, YT921X_PORTn_CTRLm(port), val); + if (unlikely(res != 0)) + return res; + + switch (state->interface) { + /* SGMII */ + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_100BASEX: + case PHY_INTERFACE_MODE_1000BASEX: + case PHY_INTERFACE_MODE_2500BASEX: + if (unlikely((BIT(port) & info->extif_mask) == 0)) { + dev_err(dev, "Wrong mode %d on port %d\n", + state->interface, port); + return -EINVAL; + } + + res = __yt921x_smi_set_bits(priv, YT921X_EXTIF_SERDESm, + YT921X_EXTIF_SERDES_EXTIFnf(port)); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_clear_bits(priv, YT921X_EXTIF_SELm, + YT921X_EXTIF_SEL_EXTIFn_XMIIf(port)); + if (unlikely(res != 0)) + return res; + + switch (state->interface) { + case PHY_INTERFACE_MODE_SGMII: + val = YT921X_SGMII_MODE_SGMII_PHYv; + break; + case PHY_INTERFACE_MODE_100BASEX: + val = YT921X_SGMII_MODE_100BASEXv; + break; + case PHY_INTERFACE_MODE_1000BASEX: + val = YT921X_SGMII_MODE_1000BASEXv; + break; + case PHY_INTERFACE_MODE_2500BASEX: + val = YT921X_SGMII_MODE_2500BASEXv; + break; + default: + /* unreachable; suppress compiler warning */ + break; + } + mask = YT921X_SGMII_MODEf; + + if (speed != YT921X_SPEED_AN) { + val |= YT921X_SGMII_LINKf; + + switch (speed) { + case YT921X_SPEED_10: + val |= YT921X_SGMII_SPEED_10v; + break; + case YT921X_SPEED_100: + val |= YT921X_SGMII_SPEED_100v; + break; + case YT921X_SPEED_1000: + val |= YT921X_SGMII_SPEED_1000v; + break; + case YT921X_SPEED_2500: + val |= YT921X_SGMII_SPEED_2500v; + break; + default: + /* unreachable; suppress compiler warning */ + break; + } + + if (duplex_full) + val |= YT921X_SGMII_DUPLEX_FULLf; + + mask |= YT921X_SGMII_LINKf; + mask |= YT921X_SGMII_SPEEDf; + mask |= YT921X_PORT_DUPLEX_FULLf; + } + + res = __yt921x_smi_update_bits(priv, YT921X_SGMIInm(port), + mask, val); + if (unlikely(res != 0)) + return res; + + break; + /* XMII */ + case PHY_INTERFACE_MODE_MII: + case PHY_INTERFACE_MODE_REVMII: + case PHY_INTERFACE_MODE_RMII: + case PHY_INTERFACE_MODE_REVRMII: + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + if (unlikely((BIT(port) & info->extif_mask) == 0)) { + dev_err(dev, "Wrong mode %d on port %d\n", + state->interface, port); + return -EINVAL; + } + + res = __yt921x_smi_clear_bits(priv, YT921X_EXTIF_SERDESm, + YT921X_EXTIF_SERDES_EXTIFnf(port)); + if (unlikely(res != 0)) + return res; + res = __yt921x_smi_set_bits(priv, YT921X_EXTIF_SELm, + YT921X_EXTIF_SEL_EXTIFn_XMIIf(port)); + if (unlikely(res != 0)) + return res; + + val = YT921X_EXTIF_MODE_PORT_ENf; + switch (state->interface) { + case PHY_INTERFACE_MODE_MII: + val |= YT921X_EXTIF_MODE_MODE_MIIv; + break; + case PHY_INTERFACE_MODE_REVMII: + val |= YT921X_EXTIF_MODE_MODE_REVMIIv; + break; + case PHY_INTERFACE_MODE_RMII: + val |= YT921X_EXTIF_MODE_MODE_RMIIv; + break; + case PHY_INTERFACE_MODE_REVRMII: + val |= YT921X_EXTIF_MODE_MODE_REVRMIIv; + break; + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + val |= YT921X_EXTIF_MODE_MODE_RGMIIv; + break; + default: + /* unreachable; suppress compiler warning */ + break; + } + /* TODO: RGMII delay */ + res = __yt921x_smi_update_bits(priv, YT921X_EXTIFn_MODEm(port), + YT921X_EXTIF_MODE_PORT_ENf | + YT921X_EXTIF_MODE_MODEf, + val); + if (unlikely(res != 0)) + return res; + + if (speed != YT921X_SPEED_AN) { + val = YT921X_MDIO_POLLING_LINKf; + + switch (speed) { + case YT921X_SPEED_10: + val |= YT921X_MDIO_POLLING_SPEED_10v; + break; + case YT921X_SPEED_100: + val |= YT921X_MDIO_POLLING_SPEED_100v; + break; + case YT921X_SPEED_1000: + val |= YT921X_MDIO_POLLING_SPEED_1000v; + break; + case YT921X_SPEED_2500: + val |= YT921X_MDIO_POLLING_SPEED_2500v; + break; + default: + /* unreachable; suppress compiler warning */ + break; + } + if (duplex_full) + val |= YT921X_MDIO_POLLING_DUPLEX_FULLf; + + res = __yt921x_smi_write(priv, + YT921X_MDIO_POLLINGnm(port), + val); + if (unlikely(res != 0)) + return res; + } + + break; + case PHY_INTERFACE_MODE_INTERNAL: + break; + default: + dev_err(dev, "Wrong mode %d on port %d\n", + state->interface, port); + break; + } + + return 0; +} + +static void +yt921x_phylink_mac_config(struct phylink_config *config, unsigned int mode, + const struct phylink_link_state *state) +{ + struct dsa_port *dp = dsa_phylink_to_port(config); + int port = dp->index; + struct dsa_switch *ds = dp->ds; + struct yt921x_priv *priv = ds->priv; + struct device *dev = priv->dev; + int res; + + dev_dbg(dev, + "%s: port %d, mode %u, interface %d, speed %d, duplex %d, " + "pause %d, advertising %lx\n", __func__, + port, mode, state->interface, state->speed, state->duplex, + state->pause, *state->advertising); + + do { + res = yt921x_smi_acquire(priv); + if (unlikely(res != 0)) + break; + res = __yt921x_port_config(priv, port, mode, state); + yt921x_smi_release(priv); + } while (0); + + if (unlikely(res != 0)) + dev_err(dev, "Cannot configure port %d: %i\n", port, res); +} + +static void +yt921x_phylink_mac_link_down(struct phylink_config *config, unsigned int mode, + phy_interface_t interface) +{ + struct dsa_port *dp = dsa_phylink_to_port(config); + int port = dp->index; + struct dsa_switch *ds = dp->ds; + struct yt921x_priv *priv = ds->priv; + struct device *dev = priv->dev; + u32 val; + int res; + + dev_dbg(dev, "%s: port %d\n", __func__, port); + + val = YT921X_PORT_RX_MAC_ENf | YT921X_PORT_TX_MAC_ENf; + res = yt921x_smi_clear_bits(priv, YT921X_PORTn_CTRLm(port), val); + if (unlikely(res != 0)) + dev_err(dev, "Cannot disable port %d: %i\n", port, res); +} + +static void +yt921x_phylink_mac_link_up(struct phylink_config *config, + struct phy_device *phydev, unsigned int mode, + phy_interface_t interface, int speed, int duplex, + bool tx_pause, bool rx_pause) +{ + struct dsa_port *dp = dsa_phylink_to_port(config); + int port = dp->index; + struct dsa_switch *ds = dp->ds; + struct yt921x_priv *priv = ds->priv; + struct device *dev = priv->dev; + u32 val; + int res; + + dev_dbg(dev, + "%s: port %d, mode %u, interface %d, speed %d, duplex %d, " + "tx_pause %d, rx_pause %d\n", __func__, port, mode, interface, + speed, duplex, tx_pause, rx_pause); + + val = YT921X_PORT_RX_MAC_ENf | YT921X_PORT_TX_MAC_ENf; + res = yt921x_smi_set_bits(priv, YT921X_PORTn_CTRLm(port), val); + if (unlikely(res != 0)) + dev_err(dev, "Cannot enable port %d: %i\n", port, res); +} + +static const struct phylink_mac_ops yt921x_phylink_mac_ops = { + .mac_config = yt921x_phylink_mac_config, + .mac_link_down = yt921x_phylink_mac_link_down, + .mac_link_up = yt921x_phylink_mac_link_up, +}; + +/******** device ********/ + +static int yt921x_probe(struct mdio_device *mdiodev) +{ + struct device *dev = &mdiodev->dev; + struct device_node *np = dev->of_node; + struct yt921x_priv *priv; + struct yt921x_smi_mdio *mdio; + struct dsa_switch *ds; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (unlikely(!priv)) + return -ENOMEM; + + mdio = devm_kzalloc(dev, sizeof(*mdio), GFP_KERNEL); + if (unlikely(!mdio)) + return -ENOMEM; + + mdio->bus = mdiodev->bus; + mdio->addr = mdiodev->addr; + if (of_property_read_u8(np, "switchid", &mdio->switchid) != 0) + mdio->switchid = 0; + + priv->dev = dev; + priv->smi_ops = &yt921x_smi_ops_mdio; + priv->smi_ctx = mdio; + + ds = &priv->ds; + ds->dev = dev; + ds->num_ports = YT921X_PORT_CTRLS_NUM; + ds->priv = priv; + ds->dev = dev; + ds->ops = &yt921x_dsa_switch_ops; + ds->phylink_mac_ops = &yt921x_phylink_mac_ops; + + dev_set_drvdata(dev, ds); + + return dsa_register_switch(ds); +} + +static void yt921x_remove(struct mdio_device *mdiodev) +{ + struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev); + + if (unlikely(!ds)) + return; + + dsa_unregister_switch(ds); +} + +static void yt921x_shutdown(struct mdio_device *mdiodev) +{ + struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev); + + if (unlikely(!ds)) + return; + + dsa_switch_shutdown(ds); +} + +static const struct of_device_id yt921x_of_match[] = { + { .compatible = "motorcomm,yt9215" }, + {} +}; +MODULE_DEVICE_TABLE(of, yt921x_of_match); + +static struct mdio_driver yt921x_driver = { + .probe = yt921x_probe, + .remove = yt921x_remove, + .shutdown = yt921x_shutdown, + .mdiodrv.driver = { + .name = "yt921x", + .of_match_table = yt921x_of_match, + }, +}; + +mdio_module_driver(yt921x_driver); + +MODULE_AUTHOR("David Yang "); +MODULE_DESCRIPTION("Driver for Motorcomm YT921x Switch"); +MODULE_LICENSE("GPL"); -- 2.47.2