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tsi108_dev.c

/*
 * tsi108/109 device setup code
 *
 * Maintained by Roy Zang < tie-fei.zang@freescale.com >
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/major.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <asm/tsi108.h>

#include <asm/system.h>
#include <asm/atomic.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/prom.h>
#include <mm/mmu_decl.h>

#undef DEBUG

#ifdef DEBUG
#define DBG(fmt...) do { printk(fmt); } while(0)
#else
#define DBG(fmt...) do { } while(0)
#endif

static phys_addr_t tsi108_csr_base = -1;

phys_addr_t get_csrbase(void)
{
      struct device_node *tsi;

      if (tsi108_csr_base != -1)
            return tsi108_csr_base;

      tsi = of_find_node_by_type(NULL, "tsi-bridge");
      if (tsi) {
            unsigned int size;
            const void *prop = of_get_property(tsi, "reg", &size);
            tsi108_csr_base = of_translate_address(tsi, prop);
            of_node_put(tsi);
      };
      return tsi108_csr_base;
}

u32 get_vir_csrbase(void)
{
      return (u32) (ioremap(get_csrbase(), 0x10000));
}

EXPORT_SYMBOL(get_csrbase);
EXPORT_SYMBOL(get_vir_csrbase);

static int __init tsi108_eth_of_init(void)
{
      struct device_node *np;
      unsigned int i;
      struct platform_device *tsi_eth_dev;
      struct resource res;
      int ret;

      for (np = NULL, i = 0;
           (np = of_find_compatible_node(np, "network", "tsi108-ethernet")) != NULL;
           i++) {
            struct resource r[2];
            struct device_node *phy, *mdio;
            hw_info tsi_eth_data;
            const unsigned int *phy_id;
            const void *mac_addr;
            const phandle *ph;

            memset(r, 0, sizeof(r));
            memset(&tsi_eth_data, 0, sizeof(tsi_eth_data));

            ret = of_address_to_resource(np, 0, &r[0]);
            DBG("%s: name:start->end = %s:0x%lx-> 0x%lx\n",
                  __FUNCTION__,r[0].name, r[0].start, r[0].end);
            if (ret)
                  goto err;

            r[1].name = "tx";
            r[1].start = irq_of_parse_and_map(np, 0);
            r[1].end = irq_of_parse_and_map(np, 0);
            r[1].flags = IORESOURCE_IRQ;
            DBG("%s: name:start->end = %s:0x%lx-> 0x%lx\n",
                  __FUNCTION__,r[1].name, r[1].start, r[1].end);

            tsi_eth_dev =
                platform_device_register_simple("tsi-ethernet", i, &r[0],
                                        1);

            if (IS_ERR(tsi_eth_dev)) {
                  ret = PTR_ERR(tsi_eth_dev);
                  goto err;
            }

            mac_addr = of_get_mac_address(np);
            if (mac_addr)
                  memcpy(tsi_eth_data.mac_addr, mac_addr, 6);

            ph = of_get_property(np, "mdio-handle", NULL);
            mdio = of_find_node_by_phandle(*ph);
            ret = of_address_to_resource(mdio, 0, &res);
            of_node_put(mdio);
            if (ret)
                  goto unreg;

            ph = of_get_property(np, "phy-handle", NULL);
            phy = of_find_node_by_phandle(*ph);

            if (phy == NULL) {
                  ret = -ENODEV;
                  goto unreg;
            }

            phy_id = of_get_property(phy, "reg", NULL);

            tsi_eth_data.regs = r[0].start;
            tsi_eth_data.phyregs = res.start;
            tsi_eth_data.phy = *phy_id;
            tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);

            /* Some boards with the TSI108 bridge (e.g. Holly)
             * have a miswiring of the ethernet PHYs which
             * requires a workaround.  The special
             * "txc-rxc-delay-disable" property enables this
             * workaround.  FIXME: Need to port the tsi108_eth
             * driver itself to phylib and use a non-misleading
             * name for the workaround flag - it's not actually to
             * do with the model of PHY in use */
            if (of_get_property(phy, "txc-rxc-delay-disable", NULL))
                  tsi_eth_data.phy_type = TSI108_PHY_BCM54XX;
            of_node_put(phy);

            ret =
                platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
                                   sizeof(hw_info));
            if (ret)
                  goto unreg;
      }
      return 0;
unreg:
      platform_device_unregister(tsi_eth_dev);
err:
      return ret;
}

arch_initcall(tsi108_eth_of_init);

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