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From e2c59cedebf72e4a002134a2932f722b508a5448 Mon Sep 17 00:00:00 2001
From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Date: Wed, 29 Aug 2012 22:08:15 +0200
Subject: net: switchlib: add driver for Lantiq PSB697X switch family
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
--- 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)
--- /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 <common.h>
+#include <malloc.h>
+#include <switch.h>
+#include <miiphy.h>
+
+#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);
+}
--- 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();
}
--- a/include/switch.h
+++ b/include/switch.h
@@ -97,6 +97,7 @@ static inline void switch_setup(struct s
}
/* Init functions for supported Switch drivers */
+extern void switch_psb697x_init(void);
#endif /* __SWITCH_H */
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