arch/powerpc/sysdev/tsi108_dev.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * tsi108/109 device setup code
   4  *
   5  * Maintained by Roy Zang < [email protected] >
   6  */
   7
   8 #include <linux/stddef.h>
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <linux/errno.h>
  12 #include <linux/major.h>
  13 #include <linux/delay.h>
  14 #include <linux/irq.h>
  15 #include <linux/export.h>
  16 #include <linux/device.h>
  17 #include <linux/etherdevice.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/of_address.h>
  20 #include <linux/of_irq.h>
  21 #include <linux/of_net.h>
  22 #include <asm/tsi108.h>
  23
  24 #include <linux/atomic.h>
  25 #include <asm/io.h>
  26 #include <asm/irq.h>
  27 #include <mm/mmu_decl.h>
  28
  29 #undef DEBUG
  30
  31 #ifdef DEBUG
  32 #define DBG(fmt...) do { printk(fmt); } while(0)
  33 #else
  34 #define DBG(fmt...) do { } while(0)
  35 #endif
  36
  37 static phys_addr_t tsi108_csr_base = -1;
  38
  39 phys_addr_t get_csrbase(void)
  40 {
  41         struct device_node *tsi;
  42
  43         if (tsi108_csr_base != -1)
  44                 return tsi108_csr_base;
  45
  46         tsi = of_find_node_by_type(NULL, "tsi-bridge");
  47         if (tsi) {
  48                 unsigned int size;
  49                 const void *prop = of_get_property(tsi, "reg", &size);
  50                 tsi108_csr_base = of_translate_address(tsi, prop);
  51                 of_node_put(tsi);
  52         }
  53         return tsi108_csr_base;
  54 }
  55 EXPORT_SYMBOL(get_csrbase);
  56
  57 u32 get_vir_csrbase(void)
  58 {
  59         return (u32) (ioremap(get_csrbase(), 0x10000));
  60 }
  61 EXPORT_SYMBOL(get_vir_csrbase);
  62
  63 static int __init tsi108_eth_of_init(void)
  64 {
  65         struct device_node *np;
  66         unsigned int i = 0;
  67         struct platform_device *tsi_eth_dev;
  68         struct resource res;
  69         int ret;
  70
  71         for_each_compatible_node(np, "network", "tsi108-ethernet") {
  72                 struct resource r[2];
  73                 struct device_node *phy, *mdio;
  74                 hw_info tsi_eth_data;
  75                 const unsigned int *phy_id;
  76                 const phandle *ph;
  77
  78                 memset(r, 0, sizeof(r));
  79                 memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));
  80
  81                 ret = of_address_to_resource(np, 0, &r[0]);
  82                 DBG("%s: name:start->end = %s:%pR\n",
  83                     __func__, r[0].name, &r[0]);
  84                 if (ret)
  85                         goto err;
  86
  87                 r[1].name = "tx";
  88                 r[1].start = irq_of_parse_and_map(np, 0);
  89                 r[1].end = irq_of_parse_and_map(np, 0);
  90                 r[1].flags = IORESOURCE_IRQ;
  91                 DBG("%s: name:start->end = %s:%pR\n",
  92                         __func__, r[1].name, &r[1]);
  93
  94                 tsi_eth_dev =
  95                     platform_device_register_simple("tsi-ethernet", i++, &r[0],
  96                                                     1);
  97
  98                 if (IS_ERR(tsi_eth_dev)) {
  99                         ret = PTR_ERR(tsi_eth_dev);
 100                         goto err;
 101                 }
 102
 103                 of_get_mac_address(np, tsi_eth_data.mac_addr);
 104
 105                 ph = of_get_property(np, "mdio-handle", NULL);
 106                 mdio = of_find_node_by_phandle(*ph);
 107                 ret = of_address_to_resource(mdio, 0, &res);
 108                 of_node_put(mdio);
 109                 if (ret)
 110                         goto unreg;
 111
 112                 ph = of_get_property(np, "phy-handle", NULL);
 113                 phy = of_find_node_by_phandle(*ph);
 114
 115                 if (phy == NULL) {
 116                         ret = -ENODEV;
 117                         goto unreg;
 118                 }
 119
 120                 phy_id = of_get_property(phy, "reg", NULL);
 121
 122                 tsi_eth_data.regs = r[0].start;
 123                 tsi_eth_data.phyregs = res.start;
 124                 tsi_eth_data.phy = *phy_id;
 125                 tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);
 126
 127                 /* Some boards with the TSI108 bridge (e.g. Holly)
 128                  * have a miswiring of the ethernet PHYs which
 129                  * requires a workaround.  The special
 130                  * "txc-rxc-delay-disable" property enables this
 131                  * workaround.  FIXME: Need to port the tsi108_eth
 132                  * driver itself to phylib and use a non-misleading
 133                  * name for the workaround flag - it's not actually to
 134                  * do with the model of PHY in use */
 135                 if (of_get_property(phy, "txc-rxc-delay-disable", NULL))
 136                         tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
 137                 of_node_put(phy);
 138
 139                 ret =
 140                     platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
 141                                              sizeof(hw_info));
 142                 if (ret)
 143                         goto unreg;
 144         }
 145         return 0;
 146 unreg:
 147         platform_device_unregister(tsi_eth_dev);
 148 err:
 149         of_node_put(np);
 150         return ret;
 151 }
 152
 153 arch_initcall(tsi108_eth_of_init);