package/boot/uboot-lantiq/patches/0009-net-switchlib-add-framework-for-ethernet-switch-driv.patch

   1 From 0dff8c753c8929a478357abb38db0d1c1a60ec94 Mon Sep 17 00:00:00 2001
   2 From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   3 Date: Wed, 29 Aug 2012 22:08:15 +0200
   4 Subject: net: switchlib: add framework for ethernet switch drivers
   5
   6 Add a generic framework similar to phylib for ethernet switch
   7 drivers and devices. This is useful to share the init and
   8 setup code for switch devices across different boards.
   9
  10 Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
  11 Cc: Joe Hershberger <joe.hershberger@gmail.com>
  12
  13 --- a/Makefile
  14 +++ b/Makefile
  15 @@ -280,6 +280,7 @@ LIBS-y += drivers/mtd/ubi/libubi.o
  16  LIBS-y += drivers/mtd/spi/libspi_flash.o
  17  LIBS-y += drivers/net/libnet.o
  18  LIBS-y += drivers/net/phy/libphy.o
  19 +LIBS-y += drivers/net/switch/libswitch.o
  20  LIBS-y += drivers/pci/libpci.o
  21  LIBS-y += drivers/pcmcia/libpcmcia.o
  22  LIBS-y += drivers/power/libpower.o \
  23 --- /dev/null
  24 +++ b/drivers/net/switch/Makefile
  25 @@ -0,0 +1,30 @@
  26 +#
  27 +# Copyright (C) 2000-2011 Wolfgang Denk, DENX Software Engineering, wd@denx.de
  28 +# Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
  29 +#
  30 +# SPDX-License-Identifier:     GPL-2.0+
  31 +#
  32 +
  33 +include $(TOPDIR)/config.mk
  34 +
  35 +LIB    := $(obj)libswitch.o
  36 +
  37 +COBJS-$(CONFIG_SWITCH_MULTI) += switch.o
  38 +
  39 +COBJS  := $(COBJS-y)
  40 +SRCS   := $(COBJS:.o=.c)
  41 +OBJS   := $(addprefix $(obj),$(COBJS))
  42 +
  43 +all:   $(LIB)
  44 +
  45 +$(LIB):        $(obj).depend $(OBJS)
  46 +       $(call cmd_link_o_target, $(OBJS))
  47 +
  48 +#########################################################################
  49 +
  50 +# defines $(obj).depend target
  51 +include $(SRCTREE)/rules.mk
  52 +
  53 +sinclude $(obj).depend
  54 +
  55 +#########################################################################
  56 --- /dev/null
  57 +++ b/drivers/net/switch/switch.c
  58 @@ -0,0 +1,62 @@
  59 +/*
  60 + * Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
  61 + *
  62 + * SPDX-License-Identifier:    GPL-2.0+
  63 + */
  64 +
  65 +#include <common.h>
  66 +#include <netdev.h>
  67 +#include <miiphy.h>
  68 +#include <switch.h>
  69 +
  70 +static struct list_head switch_drivers;
  71 +static struct list_head switch_devices;
  72 +
  73 +void switch_init(void)
  74 +{
  75 +       INIT_LIST_HEAD(&switch_drivers);
  76 +       INIT_LIST_HEAD(&switch_devices);
  77 +
  78 +       board_switch_init();
  79 +}
  80 +
  81 +void switch_driver_register(struct switch_driver *drv)
  82 +{
  83 +       INIT_LIST_HEAD(&drv->list);
  84 +       list_add_tail(&drv->list, &switch_drivers);
  85 +}
  86 +
  87 +int switch_device_register(struct switch_device *dev)
  88 +{
  89 +       struct switch_driver *drv;
  90 +
  91 +       /* Add switch device only, if an adequate driver is registered */
  92 +       list_for_each_entry(drv, &switch_drivers, list) {
  93 +               if (!strcmp(drv->name, dev->name)) {
  94 +                       dev->drv = drv;
  95 +
  96 +                       INIT_LIST_HEAD(&dev->list);
  97 +                       list_add_tail(&dev->list, &switch_devices);
  98 +
  99 +                       return 0;
 100 +               }
 101 +       }
 102 +
 103 +       return -1;
 104 +}
 105 +
 106 +struct switch_device *switch_connect(struct mii_dev *bus)
 107 +{
 108 +       struct switch_device *sw;
 109 +       int err;
 110 +
 111 +       list_for_each_entry(sw, &switch_devices, list) {
 112 +               sw->bus = bus;
 113 +
 114 +               err = sw->drv->probe(sw);
 115 +               if (!err)
 116 +                       return sw;
 117 +       }
 118 +
 119 +       return NULL;
 120 +}
 121 --- /dev/null
 122 +++ b/include/switch.h
 123 @@ -0,0 +1,102 @@
 124 +/*
 125 + * This file is released under the terms of GPL v2 and any later version.
 126 + * See the file COPYING in the root directory of the source tree for details.
 127 + *
 128 + * Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
 129 + */
 130 +
 131 +#ifndef __SWITCH_H
 132 +#define __SWITCH_H
 133 +
 134 +#include <linux/list.h>
 135 +
 136 +#define SWITCH_NAME_SIZE       32
 137 +
 138 +struct switch_device;
 139 +struct mii_dev;
 140 +
 141 +struct switch_driver {
 142 +       struct list_head list;
 143 +
 144 +       /* Switch device name */
 145 +       const char name[SWITCH_NAME_SIZE];
 146 +
 147 +       /*
 148 +        * Called to probe the switch chip. Must return 0 if the switch
 149 +        * chip matches the given switch device/driver combination. Otherwise
 150 +        * 1 must be returned.
 151 +        */
 152 +       int (*probe) (struct switch_device *dev);
 153 +
 154 +       /*
 155 +        * Called to initialize the switch chip.
 156 +        */
 157 +       void (*setup) (struct switch_device *dev);
 158 +};
 159 +
 160 +struct switch_device {
 161 +       struct list_head list;
 162 +       struct switch_driver *drv;
 163 +
 164 +       /* MII bus the switch chip is connected to */
 165 +       struct mii_dev *bus;
 166 +
 167 +       /* Switch device name */
 168 +       const char name[SWITCH_NAME_SIZE];
 169 +
 170 +       /* Bitmask for board specific setup of used switch ports */
 171 +       u16 port_mask;
 172 +
 173 +       /* Number of switch port that is connected to host CPU */
 174 +       u16 cpu_port;
 175 +};
 176 +
 177 +/*
 178 + * Board specific switch initialization.
 179 + *
 180 + * Called from switch_init to register the board specific switch_device
 181 + * structure.
 182 + */
 183 +extern int board_switch_init(void);
 184 +
 185 +/* Initialize switch subsystem */
 186 +#ifdef CONFIG_SWITCH_MULTI
 187 +extern void switch_init(void);
 188 +#else
 189 +static inline void switch_init(void)
 190 +{
 191 +}
 192 +#endif
 193 +
 194 +/* Register a switch driver */
 195 +extern void switch_driver_register(struct switch_driver *drv);
 196 +
 197 +/* Register a switch device */
 198 +extern int switch_device_register(struct switch_device *dev);
 199 +
 200 +/*
 201 + * Probe the available switch chips and connect the found one
 202 + * with the given MII bus
 203 + */
 204 +#ifdef CONFIG_SWITCH_MULTI
 205 +extern struct switch_device *switch_connect(struct mii_dev *bus);
 206 +#else
 207 +static inline struct switch_device *switch_connect(struct mii_dev *bus)
 208 +{
 209 +       return NULL;
 210 +}
 211 +#endif
 212 +
 213 +/*
 214 + * Setup the given switch device
 215 + */
 216 +static inline void switch_setup(struct switch_device *dev)
 217 +{
 218 +       if (dev->drv->setup)
 219 +               dev->drv->setup(dev);
 220 +}
 221 +
 222 +/* Init functions for supported Switch drivers */
 223 +
 224 +#endif /* __SWITCH_H */
 225 +
 226 --- a/net/eth.c
 227 +++ b/net/eth.c
 228 @@ -10,6 +10,7 @@
 229  #include <net.h>
 230  #include <miiphy.h>
 231  #include <phy.h>
 232 +#include <switch.h>
 233
 234  void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
 235  {
 236 @@ -287,6 +288,8 @@ int eth_initialize(bd_t *bis)
 237         phy_init();
 238  #endif
 239
 240 +       switch_init();
 241 +
 242         eth_env_init(bis);
 243
 244         /*