Logo Search packages:      
Sourcecode: linux version File versions  Download package

mpc85xx_mds.c

/*
 * Copyright (C) Freescale Semicondutor, Inc. 2006-2007. All rights reserved.
 *
 * Author: Andy Fleming <afleming@freescale.com>
 *
 * Based on 83xx/mpc8360e_pb.c by:
 *       Li Yang <LeoLi@freescale.com>
 *       Yin Olivia <Hong-hua.Yin@freescale.com>
 *
 * Description:
 * MPC85xx MDS board specific routines.
 *
 * 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/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/initrd.h>
#include <linux/module.h>
#include <linux/fsl_devices.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include <linux/phy.h>

#include <asm/system.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/irq.h>
#include <mm/mmu_decl.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include <asm/qe.h>
#include <asm/qe_ic.h>
#include <asm/mpic.h>

#undef DEBUG
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif

#define MV88E1111_SCR   0x10
#define MV88E1111_SCR_125CLK  0x0010
static int mpc8568_fixup_125_clock(struct phy_device *phydev)
{
      int scr;
      int err;

      /* Workaround for the 125 CLK Toggle */
      scr = phy_read(phydev, MV88E1111_SCR);

      if (scr < 0)
            return scr;

      err = phy_write(phydev, MV88E1111_SCR, scr & ~(MV88E1111_SCR_125CLK));

      if (err)
            return err;

      err = phy_write(phydev, MII_BMCR, BMCR_RESET);

      if (err)
            return err;

      scr = phy_read(phydev, MV88E1111_SCR);

      if (scr < 0)
            return err;

      err = phy_write(phydev, MV88E1111_SCR, scr | 0x0008);

      return err;
}

static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
{
      int temp;
      int err;

      /* Errata */
      err = phy_write(phydev,29, 0x0006);

      if (err)
            return err;

      temp = phy_read(phydev, 30);

      if (temp < 0)
            return temp;

      temp = (temp & (~0x8000)) | 0x4000;
      err = phy_write(phydev,30, temp);

      if (err)
            return err;

      err = phy_write(phydev,29, 0x000a);

      if (err)
            return err;

      temp = phy_read(phydev, 30);

      if (temp < 0)
            return temp;

      temp = phy_read(phydev, 30);

      if (temp < 0)
            return temp;

      temp &= ~0x0020;

      err = phy_write(phydev,30,temp);

      if (err)
            return err;

      /* Disable automatic MDI/MDIX selection */
      temp = phy_read(phydev, 16);

      if (temp < 0)
            return temp;

      temp &= ~0x0060;
      err = phy_write(phydev,16,temp);

      return err;
}

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init mpc85xx_mds_setup_arch(void)
{
      struct device_node *np;
      static u8 __iomem *bcsr_regs = NULL;

      if (ppc_md.progress)
            ppc_md.progress("mpc85xx_mds_setup_arch()", 0);

      /* Map BCSR area */
      np = of_find_node_by_name(NULL, "bcsr");
      if (np != NULL) {
            struct resource res;

            of_address_to_resource(np, 0, &res);
            bcsr_regs = ioremap(res.start, res.end - res.start +1);
            of_node_put(np);
      }

#ifdef CONFIG_PCI
      for_each_node_by_type(np, "pci") {
            if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
                of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
                  struct resource rsrc;
                  of_address_to_resource(np, 0, &rsrc);
                  if ((rsrc.start & 0xfffff) == 0x8000)
                        fsl_add_bridge(np, 1);
                  else
                        fsl_add_bridge(np, 0);
            }
      }
#endif

#ifdef CONFIG_QUICC_ENGINE
      np = of_find_compatible_node(NULL, NULL, "fsl,qe");
      if (!np) {
            np = of_find_node_by_name(NULL, "qe");
            if (!np)
                  return;
      }

      qe_reset();
      of_node_put(np);

      np = of_find_node_by_name(NULL, "par_io");
      if (np) {
            struct device_node *ucc;

            par_io_init(np);
            of_node_put(np);

            for_each_node_by_name(ucc, "ucc")
                  par_io_of_config(ucc);
      }

      if (bcsr_regs) {
#define BCSR_UCC1_GETH_EN     (0x1 << 7)
#define BCSR_UCC2_GETH_EN     (0x1 << 7)
#define BCSR_UCC1_MODE_MSK    (0x3 << 4)
#define BCSR_UCC2_MODE_MSK    (0x3 << 0)

            /* Turn off UCC1 & UCC2 */
            clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
            clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);

            /* Mode is RGMII, all bits clear */
            clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
                               BCSR_UCC2_MODE_MSK);

            /* Turn UCC1 & UCC2 on */
            setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
            setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);

            iounmap(bcsr_regs);
      }
#endif      /* CONFIG_QUICC_ENGINE */
}


static int __init board_fixups(void)
{
      char phy_id[BUS_ID_SIZE];
      char *compstrs[2] = {"fsl,gianfar-mdio", "fsl,ucc-mdio"};
      struct device_node *mdio;
      struct resource res;
      int i;

      for (i = 0; i < ARRAY_SIZE(compstrs); i++) {
            mdio = of_find_compatible_node(NULL, NULL, compstrs[i]);

            of_address_to_resource(mdio, 0, &res);
            snprintf(phy_id, BUS_ID_SIZE, "%x:%02x", res.start, 1);

            phy_register_fixup_for_id(phy_id, mpc8568_fixup_125_clock);
            phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);

            /* Register a workaround for errata */
            snprintf(phy_id, BUS_ID_SIZE, "%x:%02x", res.start, 7);
            phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);

            of_node_put(mdio);
      }

      return 0;
}
machine_arch_initcall(mpc85xx_mds, board_fixups);

static struct of_device_id mpc85xx_ids[] = {
      { .type = "soc", },
      { .compatible = "soc", },
      { .compatible = "simple-bus", },
      { .type = "qe", },
      { .compatible = "fsl,qe", },
      {},
};

static int __init mpc85xx_publish_devices(void)
{
      /* Publish the QE devices */
      of_platform_bus_probe(NULL, mpc85xx_ids, NULL);

      return 0;
}
machine_device_initcall(mpc85xx_mds, mpc85xx_publish_devices);

static void __init mpc85xx_mds_pic_init(void)
{
      struct mpic *mpic;
      struct resource r;
      struct device_node *np = NULL;

      np = of_find_node_by_type(NULL, "open-pic");
      if (!np)
            return;

      if (of_address_to_resource(np, 0, &r)) {
            printk(KERN_ERR "Failed to map mpic register space\n");
            of_node_put(np);
            return;
      }

      mpic = mpic_alloc(np, r.start,
                  MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
                  0, 256, " OpenPIC  ");
      BUG_ON(mpic == NULL);
      of_node_put(np);

      mpic_init(mpic);

#ifdef CONFIG_QUICC_ENGINE
      np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
      if (!np) {
            np = of_find_node_by_type(NULL, "qeic");
            if (!np)
                  return;
      }
      qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
      of_node_put(np);
#endif                        /* CONFIG_QUICC_ENGINE */
}

static int __init mpc85xx_mds_probe(void)
{
        unsigned long root = of_get_flat_dt_root();

        return of_flat_dt_is_compatible(root, "MPC85xxMDS");
}

define_machine(mpc85xx_mds) {
      .name       = "MPC85xx MDS",
      .probe            = mpc85xx_mds_probe,
      .setup_arch = mpc85xx_mds_setup_arch,
      .init_IRQ   = mpc85xx_mds_pic_init,
      .get_irq    = mpic_get_irq,
      .restart    = fsl_rstcr_restart,
      .calibrate_decr   = generic_calibrate_decr,
      .progress   = udbg_progress,
#ifdef CONFIG_PCI
      .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
#endif
};

Generated by  Doxygen 1.6.0   Back to index