arch/powerpc/sysdev/tsi108_dev.c

   1 /*
   2  * tsi108/109 device setup code
   3  *
   4  * Maintained by Roy Zang < tie-fei.zang@freescale.com >
   5  *
   6  * This program is free software; you can redistribute  it and/or modify it
   7  * under  the terms of  the GNU General  Public License as published by the
   8  * Free Software Foundation;  either version 2 of the  License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #include <linux/stddef.h>
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/errno.h>
  16 #include <linux/major.h>
  17 #include <linux/delay.h>
  18 #include <linux/irq.h>
  19 #include <linux/module.h>
  20 #include <linux/device.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/of_net.h>
  23 #include <asm/tsi108.h>
  24
  25 #include <asm/system.h>
  26 #include <linux/atomic.h>
  27 #include <asm/io.h>
  28 #include <asm/irq.h>
  29 #include <asm/prom.h>
  30 #include <mm/mmu_decl.h>
  31
  32 #undef DEBUG
  33
  34 #ifdef DEBUG
  35 #define DBG(fmt...) do { printk(fmt); } while(0)
  36 #else
  37 #define DBG(fmt...) do { } while(0)
  38 #endif
  39
  40 static phys_addr_t tsi108_csr_base = -1;
  41
  42 phys_addr_t get_csrbase(void)
  43 {
  44         struct device_node *tsi;
  45
  46         if (tsi108_csr_base != -1)
  47                 return tsi108_csr_base;
  48
  49         tsi = of_find_node_by_type(NULL, "tsi-bridge");
  50         if (tsi) {
  51                 unsigned int size;
  52                 const void *prop = of_get_property(tsi, "reg", &size);
  53                 tsi108_csr_base = of_translate_address(tsi, prop);
  54                 of_node_put(tsi);
  55         };
  56         return tsi108_csr_base;
  57 }
  58
  59 u32 get_vir_csrbase(void)
  60 {
  61         return (u32) (ioremap(get_csrbase(), 0x10000));
  62 }
  63
  64 EXPORT_SYMBOL(get_csrbase);
  65 EXPORT_SYMBOL(get_vir_csrbase);
  66
  67 static int __init tsi108_eth_of_init(void)
  68 {
  69         struct device_node *np;
  70         unsigned int i = 0;
  71         struct platform_device *tsi_eth_dev;
  72         struct resource res;
  73         int ret;
  74
  75         for_each_compatible_node(np, "network", "tsi108-ethernet") {
  76                 struct resource r[2];
  77                 struct device_node *phy, *mdio;
  78                 hw_info tsi_eth_data;
  79                 const unsigned int *phy_id;
  80                 const void *mac_addr;
  81                 const phandle *ph;
  82
  83                 memset(r, 0, sizeof(r));
  84                 memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));
  85
  86                 ret = of_address_to_resource(np, 0, &r[0]);
  87                 DBG("%s: name:start->end = %s:%pR\n",
  88                     __func__, r[0].name, &r[0]);
  89                 if (ret)
  90                         goto err;
  91
  92                 r[1].name = "tx";
  93                 r[1].start = irq_of_parse_and_map(np, 0);
  94                 r[1].end = irq_of_parse_and_map(np, 0);
  95                 r[1].flags = IORESOURCE_IRQ;
  96                 DBG("%s: name:start->end = %s:%pR\n",
  97                         __func__, r[1].name, &r[1]);
  98
  99                 tsi_eth_dev =
 100                     platform_device_register_simple("tsi-ethernet", i++, &r[0],
 101                                                     1);
 102
 103                 if (IS_ERR(tsi_eth_dev)) {
 104                         ret = PTR_ERR(tsi_eth_dev);
 105                         goto err;
 106                 }
 107
 108                 mac_addr = of_get_mac_address(np);
 109                 if (mac_addr)
 110                         memcpy(tsi_eth_data.mac_addr, mac_addr, 6);
 111
 112                 ph = of_get_property(np, "mdio-handle", NULL);
 113                 mdio = of_find_node_by_phandle(*ph);
 114                 ret = of_address_to_resource(mdio, 0, &res);
 115                 of_node_put(mdio);
 116                 if (ret)
 117                         goto unreg;
 118
 119                 ph = of_get_property(np, "phy-handle", NULL);
 120                 phy = of_find_node_by_phandle(*ph);
 121
 122                 if (phy == NULL) {
 123                         ret = -ENODEV;
 124                         goto unreg;
 125                 }
 126
 127                 phy_id = of_get_property(phy, "reg", NULL);
 128
 129                 tsi_eth_data.regs = r[0].start;
 130                 tsi_eth_data.phyregs = res.start;
 131                 tsi_eth_data.phy = *phy_id;
 132                 tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);
 133
 134                 /* Some boards with the TSI108 bridge (e.g. Holly)
 135                  * have a miswiring of the ethernet PHYs which
 136                  * requires a workaround.  The special
 137                  * "txc-rxc-delay-disable" property enables this
 138                  * workaround.  FIXME: Need to port the tsi108_eth
 139                  * driver itself to phylib and use a non-misleading
 140                  * name for the workaround flag - it's not actually to
 141                  * do with the model of PHY in use */
 142                 if (of_get_property(phy, "txc-rxc-delay-disable", NULL))
 143                         tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
 144                 of_node_put(phy);
 145
 146                 ret =
 147                     platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
 148                                              sizeof(hw_info));
 149                 if (ret)
 150                         goto unreg;
 151         }
 152         return 0;
 153 unreg:
 154         platform_device_unregister(tsi_eth_dev);
 155 err:
 156         of_node_put(np);
 157         return ret;
 158 }
 159
 160 arch_initcall(tsi108_eth_of_init);