From e2c59cedebf72e4a002134a2932f722b508a5448 Mon Sep 17 00:00:00 2001 From: Daniel Schwierzeck Date: Wed, 29 Aug 2012 22:08:15 +0200 Subject: net: switchlib: add driver for Lantiq PSB697X switch family Signed-off-by: Daniel Schwierzeck diff --git a/drivers/net/switch/Makefile b/drivers/net/switch/Makefile index 31719d8..a426774 100644 --- a/drivers/net/switch/Makefile +++ b/drivers/net/switch/Makefile @@ -10,6 +10,7 @@ include $(TOPDIR)/config.mk LIB := $(obj)libswitch.o COBJS-$(CONFIG_SWITCH_MULTI) += switch.o +COBJS-$(CONFIG_SWITCH_PSB697X) += psb697x.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/net/switch/psb697x.c b/drivers/net/switch/psb697x.c new file mode 100644 index 0000000..cb6c391 --- /dev/null +++ b/drivers/net/switch/psb697x.c @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include + +#define PSB697X_CHIPID1 0x2599 +#define PSB697X_PORT_COUNT 7 + +#define PSB697X_PORT_BASE(p) (p * 0x20) +#define PSB697X_REG_PS(p) (PSB697X_PORT_BASE(p) + 0x00) +#define PSB697X_REG_PBC(p) (PSB697X_PORT_BASE(p) + 0x01) +#define PSB697X_REG_PEC(p) (PSB697X_PORT_BASE(p) + 0x02) + +#define PSB697X_REG_SGC1 0x0E0 /* Switch Global Control Register 1 */ +#define PSB697X_REG_SGC2 0x0E1 /* Switch Global Control Register 2 */ +#define PSB697X_REG_CMH 0x0E2 /* CPU Port & Mirror Control */ +#define PSB697X_REG_MIICR 0x0F5 /* MII Port Control */ +#define PSB697X_REG_CI0 0x100 /* Chip Identifier 0 */ +#define PSB697X_REG_CI1 0x101 /* Chip Identifier 1 */ +#define PSB697X_REG_MIIAC 0x120 /* MII Indirect Access Control */ +#define PSB697X_REG_MIIWD 0x121 /* MII Indirect Write Data */ +#define PSB697X_REG_MIIRD 0x122 /* MII Indirect Read Data */ + +#define PSB697X_REG_PORT_FLP (1 << 2) /* Force link up */ +#define PSB697X_REG_PORT_FLD (1 << 1) /* Force link down */ + +#define PSB697X_REG_SGC2_SE (1 << 15) /* Switch enable */ + +#define PSB697X_REG_CMH_CPN_MASK 0x7 +#define PSB697X_REG_CMH_CPN_SHIFT 5 + + +static inline int psb697x_mii_read(struct mii_dev *bus, u16 reg) +{ + int ret; + + ret = bus->read(bus, (reg >> 5) & 0x1f, MDIO_DEVAD_NONE, reg & 0x1f); + + return ret; +} + +static inline int psb697x_mii_write(struct mii_dev *bus, u16 reg, u16 val) +{ + int ret; + + ret = bus->write(bus, (reg >> 5) & 0x1f, MDIO_DEVAD_NONE, + reg & 0x1f, val); + + return ret; +} + +static int psb697x_probe(struct switch_device *dev) +{ + struct mii_dev *bus = dev->bus; + int ci1; + + ci1 = psb697x_mii_read(bus, PSB697X_REG_CI1); + + if (ci1 == PSB697X_CHIPID1) + return 0; + + return 1; +} + +static void psb697x_setup(struct switch_device *dev) +{ + struct mii_dev *bus = dev->bus; + int i, state; + + /* Enable switch */ + psb697x_mii_write(bus, PSB697X_REG_SGC2, PSB697X_REG_SGC2_SE); + + /* + * Force 100 Mbps as default value for CPU ports 5 and 6 to get + * full speed. + */ + psb697x_mii_write(bus, PSB697X_REG_MIICR, 0x0773); + + for (i = 0; i < PSB697X_PORT_COUNT; i++) { + state = dev->port_mask & (1 << i); + + /* + * Software workaround from Errata Sheet: + * Force link down and reset internal PHY, keep that state + * for all unconnected ports and disable force link down + * for all connected ports + */ + psb697x_mii_write(bus, PSB697X_REG_PBC(i), + PSB697X_REG_PORT_FLD); + + if (i == dev->cpu_port) + /* Force link up for CPU port */ + psb697x_mii_write(bus, PSB697X_REG_PBC(i), + PSB697X_REG_PORT_FLP); + else if (state) + /* Disable force link down for active LAN ports */ + psb697x_mii_write(bus, PSB697X_REG_PBC(i), 0); + } +} + +static struct switch_driver psb697x_drv = { + .name = "psb697x", +}; + +void switch_psb697x_init(void) +{ + /* For archs with manual relocation */ + psb697x_drv.probe = psb697x_probe; + psb697x_drv.setup = psb697x_setup; + + switch_driver_register(&psb697x_drv); +} diff --git a/drivers/net/switch/switch.c b/drivers/net/switch/switch.c index 0e1d6b7..3d02610 100644 --- a/drivers/net/switch/switch.c +++ b/drivers/net/switch/switch.c @@ -17,6 +17,10 @@ void switch_init(void) INIT_LIST_HEAD(&switch_drivers); INIT_LIST_HEAD(&switch_devices); +#if defined(CONFIG_SWITCH_PSB697X) + switch_psb697x_init(); +#endif + board_switch_init(); } diff --git a/include/switch.h b/include/switch.h index 4a7ae63..fd3cdbd 100644 --- a/include/switch.h +++ b/include/switch.h @@ -97,6 +97,7 @@ static inline void switch_setup(struct switch_device *dev) } /* Init functions for supported Switch drivers */ +extern void switch_psb697x_init(void); #endif /* __SWITCH_H */ -- 1.8.3.2