123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2020
- * Tim Harvey, Gateworks Corporation
- */
- #include <dm.h>
- #include <dm/device_compat.h>
- #include <dm/device-internal.h>
- #include <dm/lists.h>
- #include <eth_phy.h>
- #include <linux/delay.h>
- #include <miiphy.h>
- #include <i2c.h>
- #include <net/dsa.h>
- #include <asm-generic/gpio.h>
- /* Global registers */
- /* Chip ID */
- #define REG_CHIP_ID0__1 0x0000
- /* Operation control */
- #define REG_SW_OPERATION 0x0300
- #define SW_RESET BIT(1)
- #define SW_START BIT(0)
- /* Port Specific Registers */
- #define PORT_CTRL_ADDR(port, addr) ((addr) | (((port) + 1) << 12))
- /* Port Control */
- #define REG_PORT_XMII_CTRL_1 0x0301
- #define PORT_MII_NOT_1GBIT BIT(6)
- #define PORT_MII_SEL_EDGE BIT(5)
- #define PORT_RGMII_ID_IG_ENABLE BIT(4)
- #define PORT_RGMII_ID_EG_ENABLE BIT(3)
- #define PORT_MII_MAC_MODE BIT(2)
- #define PORT_MII_SEL_M 0x3
- #define PORT_RGMII_SEL 0x0
- #define PORT_RMII_SEL 0x1
- #define PORT_GMII_SEL 0x2
- #define PORT_MII_SEL 0x3
- /* Port MSTP State Register */
- #define REG_PORT_MSTP_STATE 0x0b04
- #define PORT_TX_ENABLE BIT(2)
- #define PORT_RX_ENABLE BIT(1)
- #define PORT_LEARN_DISABLE BIT(0)
- /* MMD */
- #define REG_PORT_PHY_MMD_SETUP 0x011A
- #define PORT_MMD_OP_MODE_M 0x3
- #define PORT_MMD_OP_MODE_S 14
- #define PORT_MMD_OP_INDEX 0
- #define PORT_MMD_OP_DATA_NO_INCR 1
- #define PORT_MMD_OP_DATA_INCR_RW 2
- #define PORT_MMD_OP_DATA_INCR_W 3
- #define PORT_MMD_DEVICE_ID_M 0x1F
- #define MMD_SETUP(mode, dev) (((u16)(mode) << PORT_MMD_OP_MODE_S) | (dev))
- #define REG_PORT_PHY_MMD_INDEX_DATA 0x011C
- struct ksz_dsa_priv {
- struct udevice *dev;
- int active_port;
- };
- static inline int ksz_read8(struct udevice *dev, u32 reg, u8 *val)
- {
- int ret = dm_i2c_read(dev, reg, val, 1);
- dev_dbg(dev, "%s 0x%04x<<0x%02x\n", __func__, reg, *val);
- return ret;
- }
- static inline int ksz_pread8(struct udevice *dev, int port, int reg, u8 *val)
- {
- return ksz_read8(dev, PORT_CTRL_ADDR(port, reg), val);
- }
- static inline int ksz_write8(struct udevice *dev, u32 reg, u8 val)
- {
- dev_dbg(dev, "%s 0x%04x>>0x%02x\n", __func__, reg, val);
- return dm_i2c_write(dev, reg, &val, 1);
- }
- static inline int ksz_pwrite8(struct udevice *dev, int port, int reg, u8 val)
- {
- return ksz_write8(dev, PORT_CTRL_ADDR(port, reg), val);
- }
- static inline int ksz_write16(struct udevice *dev, u32 reg, u16 val)
- {
- u8 buf[2];
- buf[1] = val & 0xff;
- buf[0] = val >> 8;
- dev_dbg(dev, "%s 0x%04x>>0x%04x\n", __func__, reg, val);
- return dm_i2c_write(dev, reg, buf, 2);
- }
- static inline int ksz_pwrite16(struct udevice *dev, int port, int reg, u16 val)
- {
- return ksz_write16(dev, PORT_CTRL_ADDR(port, reg), val);
- }
- static inline int ksz_read16(struct udevice *dev, u32 reg, u16 *val)
- {
- u8 buf[2];
- int ret;
- ret = dm_i2c_read(dev, reg, buf, 2);
- *val = (buf[0] << 8) | buf[1];
- dev_dbg(dev, "%s 0x%04x<<0x%04x\n", __func__, reg, *val);
- return ret;
- }
- static inline int ksz_pread16(struct udevice *dev, int port, int reg, u16 *val)
- {
- return ksz_read16(dev, PORT_CTRL_ADDR(port, reg), val);
- }
- static inline int ksz_read32(struct udevice *dev, u32 reg, u32 *val)
- {
- return dm_i2c_read(dev, reg, (u8 *)val, 4);
- }
- static inline int ksz_pread32(struct udevice *dev, int port, int reg, u32 *val)
- {
- return ksz_read32(dev, PORT_CTRL_ADDR(port, reg), val);
- }
- static inline int ksz_write32(struct udevice *dev, u32 reg, u32 val)
- {
- u8 buf[4];
- buf[3] = val & 0xff;
- buf[2] = (val >> 24) & 0xff;
- buf[1] = (val >> 16) & 0xff;
- buf[0] = (val >> 8) & 0xff;
- dev_dbg(dev, "%s 0x%04x>>0x%04x\n", __func__, reg, val);
- return dm_i2c_write(dev, reg, buf, 4);
- }
- static inline int ksz_pwrite32(struct udevice *dev, int port, int reg, u32 val)
- {
- return ksz_write32(dev, PORT_CTRL_ADDR(port, reg), val);
- }
- static __maybe_unused void ksz_port_mmd_read(struct udevice *dev, int port,
- u8 addr, u16 reg, u16 *val)
- {
- ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_SETUP, MMD_SETUP(PORT_MMD_OP_INDEX, addr));
- ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_INDEX_DATA, reg);
- ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_SETUP, MMD_SETUP(PORT_MMD_OP_DATA_NO_INCR, addr));
- ksz_pread16(dev, port, REG_PORT_PHY_MMD_INDEX_DATA, val);
- dev_dbg(dev, "%s P%d 0x%02x:0x%04x<<0x%04x\n", __func__, port + 1, addr, reg, *val);
- }
- static void ksz_port_mmd_write(struct udevice *dev, int port, u8 addr, u16 reg, u16 val)
- {
- dev_dbg(dev, "%s P%d 0x%02x:0x%04x>>0x%04x\n", __func__, port + 1, addr, addr, val);
- ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_SETUP, MMD_SETUP(PORT_MMD_OP_INDEX, addr));
- ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_INDEX_DATA, addr);
- ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_SETUP, MMD_SETUP(PORT_MMD_OP_DATA_NO_INCR, addr));
- ksz_pwrite16(dev, port, REG_PORT_PHY_MMD_INDEX_DATA, val);
- }
- /* Apply PHY settings to address errata listed in KSZ9477, KSZ9897, KSZ9896, KSZ9567
- * Silicon Errata and Data Sheet Clarification documents
- */
- static void ksz_phy_errata_setup(struct udevice *dev, int port)
- {
- dev_dbg(dev, "%s P%d\n", __func__, port + 1);
- /* Register settings are needed to improve PHY receive performance */
- ksz_port_mmd_write(dev, port, 0x01, 0x6f, 0xdd0b);
- ksz_port_mmd_write(dev, port, 0x01, 0x8f, 0x6032);
- ksz_port_mmd_write(dev, port, 0x01, 0x9d, 0x248c);
- ksz_port_mmd_write(dev, port, 0x01, 0x75, 0x0060);
- ksz_port_mmd_write(dev, port, 0x01, 0xd3, 0x7777);
- ksz_port_mmd_write(dev, port, 0x1c, 0x06, 0x3008);
- ksz_port_mmd_write(dev, port, 0x1c, 0x08, 0x2001);
- /* Transmit waveform amplitude can be improved (1000BASE-T, 100BASE-TX, 10BASE-Te) */
- ksz_port_mmd_write(dev, port, 0x1c, 0x04, 0x00d0);
- /* Energy Efficient Ethernet (EEE) feature select must be manually disabled */
- ksz_port_mmd_write(dev, port, 0x07, 0x3c, 0x0000);
- /* Register settings are required to meet data sheet supply current specifications */
- ksz_port_mmd_write(dev, port, 0x1c, 0x13, 0x6eff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x14, 0xe6ff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x15, 0x6eff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x16, 0xe6ff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x17, 0x00ff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x18, 0x43ff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x19, 0xc3ff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x1a, 0x6fff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x1b, 0x07ff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x1c, 0x0fff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x1d, 0xe7ff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x1e, 0xefff);
- ksz_port_mmd_write(dev, port, 0x1c, 0x20, 0xeeee);
- }
- /*
- * mii bus driver
- */
- #define KSZ_MDIO_CHILD_DRV_NAME "ksz_mdio"
- struct ksz_mdio_priv {
- struct ksz_dsa_priv *ksz;
- };
- static int dm_ksz_mdio_read(struct udevice *dev, int addr, int devad, int reg)
- {
- struct ksz_mdio_priv *priv = dev_get_priv(dev);
- struct ksz_dsa_priv *ksz = priv->ksz;
- u16 val = 0xffff;
- ksz_pread16(ksz->dev, addr, 0x100 + (reg << 1), &val);
- dev_dbg(ksz->dev, "%s P%d reg=0x%04x:0x%04x<<0x%04x\n", __func__,
- addr + 1, reg, 0x100 + (reg << 1), val);
- return val;
- };
- static int dm_ksz_mdio_write(struct udevice *dev, int addr, int devad, int reg, u16 val)
- {
- struct ksz_mdio_priv *priv = dev_get_priv(dev);
- struct ksz_dsa_priv *ksz = priv->ksz;
- dev_dbg(ksz->dev, "%s P%d reg=0x%04x:%04x>>0x%04x\n",
- __func__, addr + 1, reg, 0x100 + (reg << 1), val);
- ksz_pwrite16(ksz->dev, addr, 0x100 + (reg << 1), val);
- return 0;
- }
- static const struct mdio_ops ksz_mdio_ops = {
- .read = dm_ksz_mdio_read,
- .write = dm_ksz_mdio_write,
- };
- static int ksz_mdio_bind(struct udevice *dev)
- {
- char name[16];
- static int num_devices;
- dev_dbg(dev, "%s\n", __func__);
- sprintf(name, "ksz-mdio-%d", num_devices++);
- device_set_name(dev, name);
- return 0;
- }
- static int ksz_mdio_probe(struct udevice *dev)
- {
- struct ksz_mdio_priv *priv = dev_get_priv(dev);
- dev_dbg(dev, "%s\n", __func__);
- priv->ksz = dev_get_parent_priv(dev->parent);
- return 0;
- }
- static const struct udevice_id ksz_mdio_ids[] = {
- { .compatible = "microchip,ksz-mdio" },
- { }
- };
- U_BOOT_DRIVER(ksz_mdio) = {
- .name = KSZ_MDIO_CHILD_DRV_NAME,
- .id = UCLASS_MDIO,
- .of_match = ksz_mdio_ids,
- .bind = ksz_mdio_bind,
- .probe = ksz_mdio_probe,
- .ops = &ksz_mdio_ops,
- .priv_auto = sizeof(struct ksz_mdio_priv),
- .plat_auto = sizeof(struct mdio_perdev_priv),
- };
- static int ksz_port_setup(struct udevice *dev, int port,
- phy_interface_t interface)
- {
- struct dsa_pdata *pdata = dev_get_uclass_plat(dev);
- u8 data8;
- dev_dbg(dev, "%s P%d %s\n", __func__, port + 1,
- (port == pdata->cpu_port) ? "cpu" : "");
- if (port != pdata->cpu_port) {
- /* phy port: config errata and leds */
- ksz_phy_errata_setup(dev, port);
- } else {
- /* cpu port: configure MAC interface mode */
- ksz_pread8(dev, port, REG_PORT_XMII_CTRL_1, &data8);
- dev_dbg(dev, "%s P%d cpu interface %s\n", __func__, port + 1,
- phy_string_for_interface(interface));
- switch (interface) {
- case PHY_INTERFACE_MODE_MII:
- data8 &= ~PORT_MII_SEL_M;
- data8 |= PORT_MII_SEL;
- data8 |= PORT_MII_NOT_1GBIT;
- break;
- case PHY_INTERFACE_MODE_RMII:
- data8 &= ~PORT_MII_SEL_M;
- data8 |= PORT_RMII_SEL;
- data8 |= PORT_MII_NOT_1GBIT;
- break;
- case PHY_INTERFACE_MODE_GMII:
- data8 &= ~PORT_MII_SEL_M;
- data8 |= PORT_GMII_SEL;
- data8 &= ~PORT_MII_NOT_1GBIT;
- break;
- default:
- data8 &= ~PORT_MII_SEL_M;
- data8 |= PORT_RGMII_SEL;
- data8 &= ~PORT_MII_NOT_1GBIT;
- data8 &= ~PORT_RGMII_ID_IG_ENABLE;
- data8 &= ~PORT_RGMII_ID_EG_ENABLE;
- if (interface == PHY_INTERFACE_MODE_RGMII_ID ||
- interface == PHY_INTERFACE_MODE_RGMII_RXID)
- data8 |= PORT_RGMII_ID_IG_ENABLE;
- if (interface == PHY_INTERFACE_MODE_RGMII_ID ||
- interface == PHY_INTERFACE_MODE_RGMII_TXID)
- data8 |= PORT_RGMII_ID_EG_ENABLE;
- break;
- }
- ksz_write8(dev, PORT_CTRL_ADDR(port, REG_PORT_XMII_CTRL_1), data8);
- }
- return 0;
- }
- static int ksz_port_enable(struct udevice *dev, int port, struct phy_device *phy)
- {
- struct dsa_pdata *pdata = dev_get_uclass_plat(dev);
- struct ksz_dsa_priv *priv = dev_get_priv(dev);
- int supported = PHY_GBIT_FEATURES;
- u8 data8;
- int ret;
- dev_dbg(dev, "%s P%d 0x%x %s\n", __func__, port + 1, phy->phy_id,
- phy_string_for_interface(phy->interface));
- /* setup this port */
- ret = ksz_port_setup(dev, port, phy->interface);
- if (ret) {
- dev_err(dev, "port setup failed: %d\n", ret);
- return ret;
- }
- /* enable port forwarding for this port */
- ksz_pread8(priv->dev, port, REG_PORT_MSTP_STATE, &data8);
- data8 &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE);
- data8 |= (PORT_TX_ENABLE | PORT_RX_ENABLE);
- ksz_pwrite8(priv->dev, port, REG_PORT_MSTP_STATE, data8);
- /* if cpu master we are done */
- if (port == pdata->cpu_port)
- return 0;
- /* configure phy */
- phy->supported &= supported;
- phy->advertising &= supported;
- ret = phy_config(phy);
- if (ret)
- return ret;
- ret = phy_startup(phy);
- if (ret)
- return ret;
- /* start switch */
- ksz_read8(priv->dev, REG_SW_OPERATION, &data8);
- data8 |= SW_START;
- ksz_write8(priv->dev, REG_SW_OPERATION, data8);
- /* keep track of current enabled non-cpu port */
- priv->active_port = port;
- return 0;
- }
- static void ksz_port_disable(struct udevice *dev, int port, struct phy_device *phy)
- {
- struct dsa_pdata *pdata = dev_get_uclass_plat(dev);
- struct ksz_dsa_priv *priv = dev_get_priv(dev);
- u8 data8;
- dev_dbg(dev, "%s P%d 0x%x\n", __func__, port + 1, phy->phy_id);
- /* can't disable CPU port without re-configuring/re-starting switch */
- if (port == pdata->cpu_port)
- return;
- /* disable port */
- ksz_pread8(priv->dev, port, REG_PORT_MSTP_STATE, &data8);
- data8 &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE);
- data8 |= PORT_LEARN_DISABLE;
- ksz_pwrite8(priv->dev, port, REG_PORT_MSTP_STATE, data8);
- /*
- * we don't call phy_shutdown here to avoid waiting next time we use
- * the port, but the downside is that remote side will think we're
- * actively processing traffic although we are not.
- */
- }
- static int ksz_xmit(struct udevice *dev, int port, void *packet, int length)
- {
- dev_dbg(dev, "%s P%d %d\n", __func__, port + 1, length);
- return 0;
- }
- static int ksz_recv(struct udevice *dev, int *port, void *packet, int length)
- {
- struct ksz_dsa_priv *priv = dev_get_priv(dev);
- dev_dbg(dev, "%s P%d %d\n", __func__, priv->active_port + 1, length);
- *port = priv->active_port;
- return 0;
- };
- static const struct dsa_ops ksz_dsa_ops = {
- .port_enable = ksz_port_enable,
- .port_disable = ksz_port_disable,
- .xmit = ksz_xmit,
- .rcv = ksz_recv,
- };
- static int ksz_probe_mdio(struct udevice *dev)
- {
- ofnode node, mdios;
- int ret;
- mdios = dev_read_subnode(dev, "mdios");
- if (ofnode_valid(mdios)) {
- ofnode_for_each_subnode(node, mdios) {
- const char *name = ofnode_get_name(node);
- struct udevice *pdev;
- ret = device_bind_driver_to_node(dev,
- KSZ_MDIO_CHILD_DRV_NAME,
- name, node, &pdev);
- if (ret)
- dev_err(dev, "failed to probe %s: %d\n", name, ret);
- }
- }
- return 0;
- }
- /*
- * I2C driver
- */
- static int ksz_i2c_probe(struct udevice *dev)
- {
- struct dsa_pdata *pdata = dev_get_uclass_plat(dev);
- struct ksz_dsa_priv *priv = dev_get_priv(dev);
- struct udevice *master = dsa_get_master(dev);
- int i, ret;
- u8 data8;
- u32 id;
- if (!master)
- return -ENODEV;
- dev_dbg(dev, "%s %s master:%s\n", __func__, dev->name, master->name);
- dev_set_parent_priv(dev, priv);
- ret = i2c_set_chip_offset_len(dev, 2);
- if (ret) {
- printf("i2c_set_chip_offset_len failed: %d\n", ret);
- return ret;
- }
- /* default config */
- priv->dev = dev;
- /* chip level reset */
- ksz_read8(priv->dev, REG_SW_OPERATION, &data8);
- data8 |= SW_RESET;
- ksz_write8(priv->dev, REG_SW_OPERATION, data8);
- /* read chip id */
- ret = ksz_read32(dev, REG_CHIP_ID0__1, &id);
- if (ret)
- return ret;
- id = __swab32(id);
- dev_dbg(dev, "%s id=0x%08x\n", __func__, id);
- switch (id & 0xffffff00) {
- case 0x00947700:
- puts("KSZ9477S: ");
- break;
- case 0x00956700:
- puts("KSZ9567R: ");
- break;
- case 0x00989700:
- puts("KSZ9897S: ");
- break;
- default:
- dev_err(dev, "invalid chip id: 0x%08x\n", id);
- return -EINVAL;
- }
- /* probe mdio bus */
- ret = ksz_probe_mdio(dev);
- if (ret)
- return ret;
- /* disable ports by default */
- for (i = 0; i < pdata->num_ports; i++) {
- ksz_pread8(priv->dev, i, REG_PORT_MSTP_STATE, &data8);
- data8 &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE);
- ksz_pwrite8(priv->dev, i, REG_PORT_MSTP_STATE, data8);
- }
- dsa_set_tagging(dev, 0, 0);
- return 0;
- };
- static const struct udevice_id ksz_i2c_ids[] = {
- { .compatible = "microchip,ksz9897" },
- { .compatible = "microchip,ksz9477" },
- { .compatible = "microchip,ksz9567" },
- { }
- };
- U_BOOT_DRIVER(ksz) = {
- .name = "ksz-switch",
- .id = UCLASS_DSA,
- .of_match = ksz_i2c_ids,
- .probe = ksz_i2c_probe,
- .ops = &ksz_dsa_ops,
- .priv_auto = sizeof(struct ksz_dsa_priv),
- };
|