From 975ae7c69d51154fccd7024d2e7f0347c34c6f72 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sat, 30 Jun 2018 13:17:30 +0200 Subject: net: phy: vitesse: Add support for VSC73xx The VSC7385, VSC7388, VSC7395 and VSC7398 are integrated switch/router chips for 5+1 or 8-port switches/routers. When managed directly by Linux using DSA we need to do a special set-up "dance" on the PHY. Unfortunately these sequences switches the PHY to undocumented pages named 2a30 and 52b6 and does undocumented things. It is described by these opaque sequences also in the reference manual. This is a best effort to integrate it anyways. Reviewed-by: Florian Fainelli Signed-off-by: Linus Walleij Signed-off-by: David S. Miller --- drivers/net/phy/vitesse.c | 175 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 175 insertions(+) diff --git a/drivers/net/phy/vitesse.c b/drivers/net/phy/vitesse.c index d9dd8fbfffc7..fbf9ad429593 100644 --- a/drivers/net/phy/vitesse.c +++ b/drivers/net/phy/vitesse.c @@ -72,6 +72,10 @@ #define PHY_ID_VSC8572 0x000704d0 #define PHY_ID_VSC8574 0x000704a0 #define PHY_ID_VSC8601 0x00070420 +#define PHY_ID_VSC7385 0x00070450 +#define PHY_ID_VSC7388 0x00070480 +#define PHY_ID_VSC7395 0x00070550 +#define PHY_ID_VSC7398 0x00070580 #define PHY_ID_VSC8662 0x00070660 #define PHY_ID_VSC8221 0x000fc550 #define PHY_ID_VSC8211 0x000fc4b0 @@ -116,6 +120,137 @@ static int vsc824x_config_init(struct phy_device *phydev) return err; } +#define VSC73XX_EXT_PAGE_ACCESS 0x1f + +static int vsc73xx_read_page(struct phy_device *phydev) +{ + return __phy_read(phydev, VSC73XX_EXT_PAGE_ACCESS); +} + +static int vsc73xx_write_page(struct phy_device *phydev, int page) +{ + return __phy_write(phydev, VSC73XX_EXT_PAGE_ACCESS, page); +} + +static void vsc73xx_config_init(struct phy_device *phydev) +{ + /* Receiver init */ + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x0c, 0x0300, 0x0200); + phy_write(phydev, 0x1f, 0x0000); + + /* Config LEDs 0x61 */ + phy_modify(phydev, MII_TPISTATUS, 0xff00, 0x0061); +} + +static int vsc738x_config_init(struct phy_device *phydev) +{ + u16 rev; + /* This magic sequence appear in the application note + * "VSC7385/7388 PHY Configuration". + * + * Maybe one day we will get to know what it all means. + */ + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x08, 0x0200, 0x0200); + phy_write(phydev, 0x1f, 0x52b5); + phy_write(phydev, 0x10, 0xb68a); + phy_modify(phydev, 0x12, 0xff07, 0x0003); + phy_modify(phydev, 0x11, 0x00ff, 0x00a2); + phy_write(phydev, 0x10, 0x968a); + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x08, 0x0200, 0x0000); + phy_write(phydev, 0x1f, 0x0000); + + /* Read revision */ + rev = phy_read(phydev, MII_PHYSID2); + rev &= 0x0f; + + /* Special quirk for revision 0 */ + if (rev == 0) { + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x08, 0x0200, 0x0200); + phy_write(phydev, 0x1f, 0x52b5); + phy_write(phydev, 0x12, 0x0000); + phy_write(phydev, 0x11, 0x0689); + phy_write(phydev, 0x10, 0x8f92); + phy_write(phydev, 0x1f, 0x52b5); + phy_write(phydev, 0x12, 0x0000); + phy_write(phydev, 0x11, 0x0e35); + phy_write(phydev, 0x10, 0x9786); + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x08, 0x0200, 0x0000); + phy_write(phydev, 0x17, 0xff80); + phy_write(phydev, 0x17, 0x0000); + } + + phy_write(phydev, 0x1f, 0x0000); + phy_write(phydev, 0x12, 0x0048); + + if (rev == 0) { + phy_write(phydev, 0x1f, 0x2a30); + phy_write(phydev, 0x14, 0x6600); + phy_write(phydev, 0x1f, 0x0000); + phy_write(phydev, 0x18, 0xa24e); + } else { + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x16, 0x0fc0, 0x0240); + phy_modify(phydev, 0x14, 0x6000, 0x4000); + /* bits 14-15 in extended register 0x14 controls DACG amplitude + * 6 = -8%, 2 is hardware default + */ + phy_write(phydev, 0x1f, 0x0001); + phy_modify(phydev, 0x14, 0xe000, 0x6000); + phy_write(phydev, 0x1f, 0x0000); + } + + vsc73xx_config_init(phydev); + + return genphy_config_init(phydev); +} + +static int vsc739x_config_init(struct phy_device *phydev) +{ + /* This magic sequence appears in the VSC7395 SparX-G5e application + * note "VSC7395/VSC7398 PHY Configuration" + * + * Maybe one day we will get to know what it all means. + */ + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x08, 0x0200, 0x0200); + phy_write(phydev, 0x1f, 0x52b5); + phy_write(phydev, 0x10, 0xb68a); + phy_modify(phydev, 0x12, 0xff07, 0x0003); + phy_modify(phydev, 0x11, 0x00ff, 0x00a2); + phy_write(phydev, 0x10, 0x968a); + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x08, 0x0200, 0x0000); + phy_write(phydev, 0x1f, 0x0000); + + phy_write(phydev, 0x1f, 0x0000); + phy_write(phydev, 0x12, 0x0048); + phy_write(phydev, 0x1f, 0x2a30); + phy_modify(phydev, 0x16, 0x0fc0, 0x0240); + phy_modify(phydev, 0x14, 0x6000, 0x4000); + phy_write(phydev, 0x1f, 0x0001); + phy_modify(phydev, 0x14, 0xe000, 0x6000); + phy_write(phydev, 0x1f, 0x0000); + + vsc73xx_config_init(phydev); + + return genphy_config_init(phydev); +} + +static int vsc73xx_config_aneg(struct phy_device *phydev) +{ + /* The VSC73xx switches does not like to be instructed to + * do autonegotiation in any way, it prefers that you just go + * with the power-on/reset defaults. Writing some registers will + * just make autonegotiation permanently fail. + */ + return 0; +} + /* This adds a skew for both TX and RX clocks, so the skew should only be * applied to "rgmii-id" interfaces. It may not work as expected * on "rgmii-txid", "rgmii-rxid" or "rgmii" interfaces. */ @@ -318,6 +453,42 @@ static struct phy_driver vsc82xx_driver[] = { .config_init = &vsc8601_config_init, .ack_interrupt = &vsc824x_ack_interrupt, .config_intr = &vsc82xx_config_intr, +}, { + .phy_id = PHY_ID_VSC7385, + .name = "Vitesse VSC7385", + .phy_id_mask = 0x000ffff0, + .features = PHY_GBIT_FEATURES, + .config_init = vsc738x_config_init, + .config_aneg = vsc73xx_config_aneg, + .read_page = vsc73xx_read_page, + .write_page = vsc73xx_write_page, +}, { + .phy_id = PHY_ID_VSC7388, + .name = "Vitesse VSC7388", + .phy_id_mask = 0x000ffff0, + .features = PHY_GBIT_FEATURES, + .config_init = vsc738x_config_init, + .config_aneg = vsc73xx_config_aneg, + .read_page = vsc73xx_read_page, + .write_page = vsc73xx_write_page, +}, { + .phy_id = PHY_ID_VSC7395, + .name = "Vitesse VSC7395", + .phy_id_mask = 0x000ffff0, + .features = PHY_GBIT_FEATURES, + .config_init = vsc739x_config_init, + .config_aneg = vsc73xx_config_aneg, + .read_page = vsc73xx_read_page, + .write_page = vsc73xx_write_page, +}, { + .phy_id = PHY_ID_VSC7398, + .name = "Vitesse VSC7398", + .phy_id_mask = 0x000ffff0, + .features = PHY_GBIT_FEATURES, + .config_init = vsc739x_config_init, + .config_aneg = vsc73xx_config_aneg, + .read_page = vsc73xx_read_page, + .write_page = vsc73xx_write_page, }, { .phy_id = PHY_ID_VSC8662, .name = "Vitesse VSC8662", @@ -358,6 +529,10 @@ static struct mdio_device_id __maybe_unused vitesse_tbl[] = { { PHY_ID_VSC8514, 0x000ffff0 }, { PHY_ID_VSC8572, 0x000ffff0 }, { PHY_ID_VSC8574, 0x000ffff0 }, + { PHY_ID_VSC7385, 0x000ffff0 }, + { PHY_ID_VSC7388, 0x000ffff0 }, + { PHY_ID_VSC7395, 0x000ffff0 }, + { PHY_ID_VSC7398, 0x000ffff0 }, { PHY_ID_VSC8662, 0x000ffff0 }, { PHY_ID_VSC8221, 0x000ffff0 }, { PHY_ID_VSC8211, 0x000ffff0 }, -- cgit v1.2.3