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