target/linux/lantiq/patches-4.4/0035-owrt-lantiq-wifi-and-ethernet-eeprom-handling.patch

   1 From f8c5db89e793a4bc6c1e87bd7b3a5cec16b75bc3 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Wed, 10 Sep 2014 22:42:14 +0200
   4 Subject: [PATCH 35/36] owrt: lantiq: wifi and ethernet eeprom handling
   5
   6 Signed-off-by: John Crispin <blogic@openwrt.org>
   7 ---
   8  .../mips/include/asm/mach-lantiq/xway/lantiq_soc.h |   3 +
   9  arch/mips/lantiq/xway/Makefile                     |   3 +
  10  arch/mips/lantiq/xway/ath5k_eep.c                  | 136 +++++++++++++++++++++
  11  arch/mips/lantiq/xway/eth_mac.c                    |  25 ++++
  12  drivers/net/ethernet/lantiq_etop.c                 |   6 +-
  13  5 files changed, 172 insertions(+), 1 deletion(-)
  14  create mode 100644 arch/mips/lantiq/xway/ath5k_eep.c
  15  create mode 100644 arch/mips/lantiq/xway/eth_mac.c
  16
  17 --- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
  18 +++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
  19 @@ -104,5 +104,8 @@ int xrx200_gphy_boot(struct device *dev,
  20  extern void ltq_pmu_enable(unsigned int module);
  21  extern void ltq_pmu_disable(unsigned int module);
  22
  23 +/* allow the ethernet driver to load a flash mapped mac addr */
  24 +const u8* ltq_get_eth_mac(void);
  25 +
  26  #endif /* CONFIG_SOC_TYPE_XWAY */
  27  #endif /* _LTQ_XWAY_H__ */
  28 --- a/arch/mips/lantiq/xway/Makefile
  29 +++ b/arch/mips/lantiq/xway/Makefile
  30 @@ -2,4 +2,7 @@ obj-y := prom.o sysctrl.o clk.o reset.o
  31
  32  obj-y += vmmc.o tffs.o
  33
  34 +obj-y += eth_mac.o
  35 +obj-$(CONFIG_PCI) += ath5k_eep.o
  36 +
  37  obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
  38 --- /dev/null
  39 +++ b/arch/mips/lantiq/xway/ath5k_eep.c
  40 @@ -0,0 +1,136 @@
  41 +/*
  42 + *  Copyright (C) 2011 Luca Olivetti <luca@ventoso.org>
  43 + *  Copyright (C) 2011 John Crispin <blogic@openwrt.org>
  44 + *  Copyright (C) 2011 Andrej Vlašić <andrej.vlasic0@gmail.com>
  45 + *  Copyright (C) 2013 Álvaro Fernández Rojas <noltari@gmail.com>
  46 + *  Copyright (C) 2013 Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
  47 + *  Copyright (C) 2015 Vittorio Gambaletta <openwrt@vittgam.net>
  48 + *
  49 + *  This program is free software; you can redistribute it and/or modify it
  50 + *  under the terms of the GNU General Public License version 2 as published
  51 + *  by the Free Software Foundation.
  52 + */
  53 +
  54 +#include <linux/init.h>
  55 +#include <linux/platform_device.h>
  56 +#include <linux/etherdevice.h>
  57 +#include <linux/ath5k_platform.h>
  58 +#include <linux/pci.h>
  59 +#include <linux/err.h>
  60 +#include <linux/mtd/mtd.h>
  61 +#include <lantiq_soc.h>
  62 +
  63 +extern int (*ltq_pci_plat_dev_init)(struct pci_dev *dev);
  64 +struct ath5k_platform_data ath5k_pdata;
  65 +static u8 athxk_eeprom_mac[6];
  66 +
  67 +static int ath5k_pci_plat_dev_init(struct pci_dev *dev)
  68 +{
  69 +       dev->dev.platform_data = &ath5k_pdata;
  70 +       return 0;
  71 +}
  72 +
  73 +static int ath5k_eep_load;
  74 +int __init of_ath5k_eeprom_probe(struct platform_device *pdev)
  75 +{
  76 +       struct device_node *np = pdev->dev.of_node, *mtd_np = NULL;
  77 +       int mac_offset;
  78 +       u32 mac_inc = 0;
  79 +       int i;
  80 +       struct mtd_info *the_mtd;
  81 +       size_t flash_readlen;
  82 +       const __be32 *list;
  83 +       const char *part;
  84 +       phandle phandle;
  85 +
  86 +       list = of_get_property(np, "ath,eep-flash", &i);
  87 +       if (!list || (i != (2 * sizeof(*list))))
  88 +               return -ENODEV;
  89 +
  90 +       phandle = be32_to_cpup(list++);
  91 +       if (phandle)
  92 +               mtd_np = of_find_node_by_phandle(phandle);
  93 +
  94 +       if (!mtd_np)
  95 +               return -ENODEV;
  96 +
  97 +       part = of_get_property(mtd_np, "label", NULL);
  98 +       if (!part)
  99 +               part = mtd_np->name;
 100 +
 101 +       the_mtd = get_mtd_device_nm(part);
 102 +       if (IS_ERR(the_mtd))
 103 +               return -ENODEV;
 104 +
 105 +       ath5k_pdata.eeprom_data = kmalloc(ATH5K_PLAT_EEP_MAX_WORDS<<1, GFP_KERNEL);
 106 +
 107 +       i = mtd_read(the_mtd, be32_to_cpup(list), ATH5K_PLAT_EEP_MAX_WORDS << 1,
 108 +               &flash_readlen, (void *) ath5k_pdata.eeprom_data);
 109 +
 110 +       if (!of_property_read_u32(np, "ath,mac-offset", &mac_offset)) {
 111 +               size_t mac_readlen;
 112 +               mtd_read(the_mtd, mac_offset, 6, &mac_readlen,
 113 +                       (void *) athxk_eeprom_mac);
 114 +       }
 115 +       put_mtd_device(the_mtd);
 116 +
 117 +       if (((ATH5K_PLAT_EEP_MAX_WORDS<<1) != flash_readlen) || i) {
 118 +               dev_err(&pdev->dev, "failed to load eeprom from mtd\n");
 119 +               return -ENODEV;
 120 +       }
 121 +
 122 +       if (of_find_property(np, "ath,eep-swap", NULL))
 123 +               for (i = 0; i < ATH5K_PLAT_EEP_MAX_WORDS; i++)
 124 +                       ath5k_pdata.eeprom_data[i] = swab16(ath5k_pdata.eeprom_data[i]);
 125 +
 126 +       if (!is_valid_ether_addr(athxk_eeprom_mac) && ltq_get_eth_mac())
 127 +               ether_addr_copy(athxk_eeprom_mac, ltq_get_eth_mac());
 128 +
 129 +       if (!is_valid_ether_addr(athxk_eeprom_mac)) {
 130 +               dev_warn(&pdev->dev, "using random mac\n");
 131 +               random_ether_addr(athxk_eeprom_mac);
 132 +       }
 133 +
 134 +       if (!of_property_read_u32(np, "ath,mac-increment", &mac_inc))
 135 +               athxk_eeprom_mac[5] += mac_inc;
 136 +
 137 +       ath5k_pdata.macaddr = athxk_eeprom_mac;
 138 +       ltq_pci_plat_dev_init = ath5k_pci_plat_dev_init;
 139 +
 140 +       dev_info(&pdev->dev, "loaded ath5k eeprom\n");
 141 +
 142 +       return 0;
 143 +}
 144 +
 145 +static struct of_device_id ath5k_eeprom_ids[] = {
 146 +       { .compatible = "ath5k,eeprom" },
 147 +       { }
 148 +};
 149 +
 150 +static struct platform_driver ath5k_eeprom_driver = {
 151 +       .driver         = {
 152 +               .name           = "ath5k,eeprom",
 153 +               .owner  = THIS_MODULE,
 154 +               .of_match_table = of_match_ptr(ath5k_eeprom_ids),
 155 +       },
 156 +};
 157 +
 158 +static int __init of_ath5k_eeprom_init(void)
 159 +{
 160 +       int ret = platform_driver_probe(&ath5k_eeprom_driver, of_ath5k_eeprom_probe);
 161 +
 162 +       if (ret)
 163 +               ath5k_eep_load = 1;
 164 +
 165 +       return ret;
 166 +}
 167 +
 168 +static int __init of_ath5k_eeprom_init_late(void)
 169 +{
 170 +       if (!ath5k_eep_load)
 171 +               return 0;
 172 +
 173 +       return platform_driver_probe(&ath5k_eeprom_driver, of_ath5k_eeprom_probe);
 174 +}
 175 +late_initcall(of_ath5k_eeprom_init_late);
 176 +subsys_initcall(of_ath5k_eeprom_init);
 177 --- /dev/null
 178 +++ b/arch/mips/lantiq/xway/eth_mac.c
 179 @@ -0,0 +1,25 @@
 180 +/*
 181 + *  Copyright (C) 2012 John Crispin <blogic@openwrt.org>
 182 + *
 183 + *  This program is free software; you can redistribute it and/or modify it
 184 + *  under the terms of the GNU General Public License version 2 as published
 185 + *  by the Free Software Foundation.
 186 + */
 187 +
 188 +#include <linux/init.h>
 189 +#include <linux/if_ether.h>
 190 +
 191 +static u8 eth_mac[6];
 192 +static int eth_mac_set;
 193 +
 194 +const u8* ltq_get_eth_mac(void)
 195 +{
 196 +       return eth_mac;
 197 +}
 198 +
 199 +static int __init setup_ethaddr(char *str)
 200 +{
 201 +       eth_mac_set = mac_pton(str, eth_mac);
 202 +       return !eth_mac_set;
 203 +}
 204 +early_param("ethaddr", setup_ethaddr);
 205 --- a/drivers/net/ethernet/lantiq_etop.c
 206 +++ b/drivers/net/ethernet/lantiq_etop.c
 207 @@ -840,7 +840,11 @@ ltq_etop_init(struct net_device *dev)
 208         if (err)
 209                 goto err_hw;
 210
 211 -       memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr));
 212 +       memcpy(&mac.sa_data, ltq_get_eth_mac(), ETH_ALEN);
 213 +
 214 +       if (priv->mac && !is_valid_ether_addr(mac.sa_data))
 215 +               memcpy(&mac.sa_data, priv->mac, ETH_ALEN);
 216 +
 217         if (!is_valid_ether_addr(mac.sa_data)) {
 218                 pr_warn("etop: invalid MAC, using random\n");
 219                 eth_random_addr(mac.sa_data);