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