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 diff --git a/Makefile b/Makefile
  14 index dc04179..6ee9a3c 100644
  15 --- a/Makefile
  16 +++ b/Makefile
  17 @@ -280,6 +280,7 @@ LIBS-y += drivers/mtd/ubi/libubi.o
  18  LIBS-y += drivers/mtd/spi/libspi_flash.o
  19  LIBS-y += drivers/net/libnet.o
  20  LIBS-y += drivers/net/phy/libphy.o
  21 +LIBS-y += drivers/net/switch/libswitch.o
  22  LIBS-y += drivers/pci/libpci.o
  23  LIBS-y += drivers/pcmcia/libpcmcia.o
  24  LIBS-y += drivers/power/libpower.o \
  25 diff --git a/drivers/net/switch/Makefile b/drivers/net/switch/Makefile
  26 new file mode 100644
  27 index 0000000..31719d8
  28 --- /dev/null
  29 +++ b/drivers/net/switch/Makefile
  30 @@ -0,0 +1,30 @@
  31 +#
  32 +# Copyright (C) 2000-2011 Wolfgang Denk, DENX Software Engineering, wd@denx.de
  33 +# Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
  34 +#
  35 +# SPDX-License-Identifier:     GPL-2.0+
  36 +#
  37 +
  38 +include $(TOPDIR)/config.mk
  39 +
  40 +LIB    := $(obj)libswitch.o
  41 +
  42 +COBJS-$(CONFIG_SWITCH_MULTI) += switch.o
  43 +
  44 +COBJS  := $(COBJS-y)
  45 +SRCS   := $(COBJS:.o=.c)
  46 +OBJS   := $(addprefix $(obj),$(COBJS))
  47 +
  48 +all:   $(LIB)
  49 +
  50 +$(LIB):        $(obj).depend $(OBJS)
  51 +       $(call cmd_link_o_target, $(OBJS))
  52 +
  53 +#########################################################################
  54 +
  55 +# defines $(obj).depend target
  56 +include $(SRCTREE)/rules.mk
  57 +
  58 +sinclude $(obj).depend
  59 +
  60 +#########################################################################
  61 diff --git a/drivers/net/switch/switch.c b/drivers/net/switch/switch.c
  62 new file mode 100644
  63 index 0000000..0e1d6b7
  64 --- /dev/null
  65 +++ b/drivers/net/switch/switch.c
  66 @@ -0,0 +1,62 @@
  67 +/*
  68 + * Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
  69 + *
  70 + * SPDX-License-Identifier:    GPL-2.0+
  71 + */
  72 +
  73 +#include <common.h>
  74 +#include <netdev.h>
  75 +#include <miiphy.h>
  76 +#include <switch.h>
  77 +
  78 +static struct list_head switch_drivers;
  79 +static struct list_head switch_devices;
  80 +
  81 +void switch_init(void)
  82 +{
  83 +       INIT_LIST_HEAD(&switch_drivers);
  84 +       INIT_LIST_HEAD(&switch_devices);
  85 +
  86 +       board_switch_init();
  87 +}
  88 +
  89 +void switch_driver_register(struct switch_driver *drv)
  90 +{
  91 +       INIT_LIST_HEAD(&drv->list);
  92 +       list_add_tail(&drv->list, &switch_drivers);
  93 +}
  94 +
  95 +int switch_device_register(struct switch_device *dev)
  96 +{
  97 +       struct switch_driver *drv;
  98 +
  99 +       /* Add switch device only, if an adequate driver is registered */
 100 +       list_for_each_entry(drv, &switch_drivers, list) {
 101 +               if (!strcmp(drv->name, dev->name)) {
 102 +                       dev->drv = drv;
 103 +
 104 +                       INIT_LIST_HEAD(&dev->list);
 105 +                       list_add_tail(&dev->list, &switch_devices);
 106 +
 107 +                       return 0;
 108 +               }
 109 +       }
 110 +
 111 +       return -1;
 112 +}
 113 +
 114 +struct switch_device *switch_connect(struct mii_dev *bus)
 115 +{
 116 +       struct switch_device *sw;
 117 +       int err;
 118 +
 119 +       list_for_each_entry(sw, &switch_devices, list) {
 120 +               sw->bus = bus;
 121 +
 122 +               err = sw->drv->probe(sw);
 123 +               if (!err)
 124 +                       return sw;
 125 +       }
 126 +
 127 +       return NULL;
 128 +}
 129 diff --git a/include/switch.h b/include/switch.h
 130 new file mode 100644
 131 index 0000000..4a7ae63
 132 --- /dev/null
 133 +++ b/include/switch.h
 134 @@ -0,0 +1,102 @@
 135 +/*
 136 + * This file is released under the terms of GPL v2 and any later version.
 137 + * See the file COPYING in the root directory of the source tree for details.
 138 + *
 139 + * Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
 140 + */
 141 +
 142 +#ifndef __SWITCH_H
 143 +#define __SWITCH_H
 144 +
 145 +#include <linux/list.h>
 146 +
 147 +#define SWITCH_NAME_SIZE       32
 148 +
 149 +struct switch_device;
 150 +struct mii_dev;
 151 +
 152 +struct switch_driver {
 153 +       struct list_head list;
 154 +
 155 +       /* Switch device name */
 156 +       const char name[SWITCH_NAME_SIZE];
 157 +
 158 +       /*
 159 +        * Called to probe the switch chip. Must return 0 if the switch
 160 +        * chip matches the given switch device/driver combination. Otherwise
 161 +        * 1 must be returned.
 162 +        */
 163 +       int (*probe) (struct switch_device *dev);
 164 +
 165 +       /*
 166 +        * Called to initialize the switch chip.
 167 +        */
 168 +       void (*setup) (struct switch_device *dev);
 169 +};
 170 +
 171 +struct switch_device {
 172 +       struct list_head list;
 173 +       struct switch_driver *drv;
 174 +
 175 +       /* MII bus the switch chip is connected to */
 176 +       struct mii_dev *bus;
 177 +
 178 +       /* Switch device name */
 179 +       const char name[SWITCH_NAME_SIZE];
 180 +
 181 +       /* Bitmask for board specific setup of used switch ports */
 182 +       u16 port_mask;
 183 +
 184 +       /* Number of switch port that is connected to host CPU */
 185 +       u16 cpu_port;
 186 +};
 187 +
 188 +/*
 189 + * Board specific switch initialization.
 190 + *
 191 + * Called from switch_init to register the board specific switch_device
 192 + * structure.
 193 + */
 194 +extern int board_switch_init(void);
 195 +
 196 +/* Initialize switch subsystem */
 197 +#ifdef CONFIG_SWITCH_MULTI
 198 +extern void switch_init(void);
 199 +#else
 200 +static inline void switch_init(void)
 201 +{
 202 +}
 203 +#endif
 204 +
 205 +/* Register a switch driver */
 206 +extern void switch_driver_register(struct switch_driver *drv);
 207 +
 208 +/* Register a switch device */
 209 +extern int switch_device_register(struct switch_device *dev);
 210 +
 211 +/*
 212 + * Probe the available switch chips and connect the found one
 213 + * with the given MII bus
 214 + */
 215 +#ifdef CONFIG_SWITCH_MULTI
 216 +extern struct switch_device *switch_connect(struct mii_dev *bus);
 217 +#else
 218 +static inline struct switch_device *switch_connect(struct mii_dev *bus)
 219 +{
 220 +       return NULL;
 221 +}
 222 +#endif
 223 +
 224 +/*
 225 + * Setup the given switch device
 226 + */
 227 +static inline void switch_setup(struct switch_device *dev)
 228 +{
 229 +       if (dev->drv->setup)
 230 +               dev->drv->setup(dev);
 231 +}
 232 +
 233 +/* Init functions for supported Switch drivers */
 234 +
 235 +#endif /* __SWITCH_H */
 236 +
 237 diff --git a/net/eth.c b/net/eth.c
 238 index c96e767..03ecc1c 100644
 239 --- a/net/eth.c
 240 +++ b/net/eth.c
 241 @@ -10,6 +10,7 @@
 242  #include <net.h>
 243  #include <miiphy.h>
 244  #include <phy.h>
 245 +#include <switch.h>
 246
 247  void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
 248  {
 249 @@ -287,6 +288,8 @@ int eth_initialize(bd_t *bis)
 250         phy_init();
 251  #endif
 252
 253 +       switch_init();
 254 +
 255         eth_env_init(bis);
 256
 257         /*
 258 --
 259 1.8.3.2
 260