arch/powerpc/platforms/85xx/mpc85xx_mds.c

   1 /*
   2  * Copyright (C) Freescale Semicondutor, Inc. 2006-2007. All rights reserved.
   3  *
   4  * Author: Andy Fleming <afleming@freescale.com>
   5  *
   6  * Based on 83xx/mpc8360e_pb.c by:
   7  *         Li Yang <LeoLi@freescale.com>
   8  *         Yin Olivia <Hong-hua.Yin@freescale.com>
   9  *
  10  * Description:
  11  * MPC85xx MDS board specific routines.
  12  *
  13  * This program is free software; you can redistribute  it and/or modify it
  14  * under  the terms of  the GNU General  Public License as published by the
  15  * Free Software Foundation;  either version 2 of the  License, or (at your
  16  * option) any later version.
  17  */
  18
  19 #include <linux/stddef.h>
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/errno.h>
  23 #include <linux/reboot.h>
  24 #include <linux/pci.h>
  25 #include <linux/kdev_t.h>
  26 #include <linux/major.h>
  27 #include <linux/console.h>
  28 #include <linux/delay.h>
  29 #include <linux/seq_file.h>
  30 #include <linux/initrd.h>
  31 #include <linux/module.h>
  32 #include <linux/fsl_devices.h>
  33 #include <linux/of_platform.h>
  34 #include <linux/of_device.h>
  35 #include <linux/phy.h>
  36
  37 #include <asm/system.h>
  38 #include <asm/atomic.h>
  39 #include <asm/time.h>
  40 #include <asm/io.h>
  41 #include <asm/machdep.h>
  42 #include <asm/pci-bridge.h>
  43 #include <asm/irq.h>
  44 #include <mm/mmu_decl.h>
  45 #include <asm/prom.h>
  46 #include <asm/udbg.h>
  47 #include <sysdev/fsl_soc.h>
  48 #include <sysdev/fsl_pci.h>
  49 #include <asm/qe.h>
  50 #include <asm/qe_ic.h>
  51 #include <asm/mpic.h>
  52
  53 #undef DEBUG
  54 #ifdef DEBUG
  55 #define DBG(fmt...) udbg_printf(fmt)
  56 #else
  57 #define DBG(fmt...)
  58 #endif
  59
  60 #define MV88E1111_SCR   0x10
  61 #define MV88E1111_SCR_125CLK    0x0010
  62 static int mpc8568_fixup_125_clock(struct phy_device *phydev)
  63 {
  64         int scr;
  65         int err;
  66
  67         /* Workaround for the 125 CLK Toggle */
  68         scr = phy_read(phydev, MV88E1111_SCR);
  69
  70         if (scr < 0)
  71                 return scr;
  72
  73         err = phy_write(phydev, MV88E1111_SCR, scr & ~(MV88E1111_SCR_125CLK));
  74
  75         if (err)
  76                 return err;
  77
  78         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
  79
  80         if (err)
  81                 return err;
  82
  83         scr = phy_read(phydev, MV88E1111_SCR);
  84
  85         if (scr < 0)
  86                 return err;
  87
  88         err = phy_write(phydev, MV88E1111_SCR, scr | 0x0008);
  89
  90         return err;
  91 }
  92
  93 static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
  94 {
  95         int temp;
  96         int err;
  97
  98         /* Errata */
  99         err = phy_write(phydev,29, 0x0006);
 100
 101         if (err)
 102                 return err;
 103
 104         temp = phy_read(phydev, 30);
 105
 106         if (temp < 0)
 107                 return temp;
 108
 109         temp = (temp & (~0x8000)) | 0x4000;
 110         err = phy_write(phydev,30, temp);
 111
 112         if (err)
 113                 return err;
 114
 115         err = phy_write(phydev,29, 0x000a);
 116
 117         if (err)
 118                 return err;
 119
 120         temp = phy_read(phydev, 30);
 121
 122         if (temp < 0)
 123                 return temp;
 124
 125         temp = phy_read(phydev, 30);
 126
 127         if (temp < 0)
 128                 return temp;
 129
 130         temp &= ~0x0020;
 131
 132         err = phy_write(phydev,30,temp);
 133
 134         if (err)
 135                 return err;
 136
 137         /* Disable automatic MDI/MDIX selection */
 138         temp = phy_read(phydev, 16);
 139
 140         if (temp < 0)
 141                 return temp;
 142
 143         temp &= ~0x0060;
 144         err = phy_write(phydev,16,temp);
 145
 146         return err;
 147 }
 148
 149 /* ************************************************************************
 150  *
 151  * Setup the architecture
 152  *
 153  */
 154 static void __init mpc85xx_mds_setup_arch(void)
 155 {
 156         struct device_node *np;
 157         static u8 __iomem *bcsr_regs = NULL;
 158
 159         if (ppc_md.progress)
 160                 ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
 161
 162         /* Map BCSR area */
 163         np = of_find_node_by_name(NULL, "bcsr");
 164         if (np != NULL) {
 165                 struct resource res;
 166
 167                 of_address_to_resource(np, 0, &res);
 168                 bcsr_regs = ioremap(res.start, res.end - res.start +1);
 169                 of_node_put(np);
 170         }
 171
 172 #ifdef CONFIG_PCI
 173         for_each_node_by_type(np, "pci") {
 174                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 175                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
 176                         struct resource rsrc;
 177                         of_address_to_resource(np, 0, &rsrc);
 178                         if ((rsrc.start & 0xfffff) == 0x8000)
 179                                 fsl_add_bridge(np, 1);
 180                         else
 181                                 fsl_add_bridge(np, 0);
 182                 }
 183         }
 184 #endif
 185
 186 #ifdef CONFIG_QUICC_ENGINE
 187         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
 188         if (!np) {
 189                 np = of_find_node_by_name(NULL, "qe");
 190                 if (!np)
 191                         return;
 192         }
 193
 194         qe_reset();
 195         of_node_put(np);
 196
 197         np = of_find_node_by_name(NULL, "par_io");
 198         if (np) {
 199                 struct device_node *ucc;
 200
 201                 par_io_init(np);
 202                 of_node_put(np);
 203
 204                 for_each_node_by_name(ucc, "ucc")
 205                         par_io_of_config(ucc);
 206         }
 207
 208         if (bcsr_regs) {
 209 #define BCSR_UCC1_GETH_EN       (0x1 << 7)
 210 #define BCSR_UCC2_GETH_EN       (0x1 << 7)
 211 #define BCSR_UCC1_MODE_MSK      (0x3 << 4)
 212 #define BCSR_UCC2_MODE_MSK      (0x3 << 0)
 213
 214                 /* Turn off UCC1 & UCC2 */
 215                 clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
 216                 clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
 217
 218                 /* Mode is RGMII, all bits clear */
 219                 clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
 220                                          BCSR_UCC2_MODE_MSK);
 221
 222                 /* Turn UCC1 & UCC2 on */
 223                 setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
 224                 setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
 225
 226                 iounmap(bcsr_regs);
 227         }
 228 #endif  /* CONFIG_QUICC_ENGINE */
 229 }
 230
 231
 232 static int __init board_fixups(void)
 233 {
 234         char phy_id[20];
 235         char *compstrs[2] = {"fsl,gianfar-mdio", "fsl,ucc-mdio"};
 236         struct device_node *mdio;
 237         struct resource res;
 238         int i;
 239
 240         for (i = 0; i < ARRAY_SIZE(compstrs); i++) {
 241                 mdio = of_find_compatible_node(NULL, NULL, compstrs[i]);
 242
 243                 of_address_to_resource(mdio, 0, &res);
 244                 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
 245                         (unsigned long long)res.start, 1);
 246
 247                 phy_register_fixup_for_id(phy_id, mpc8568_fixup_125_clock);
 248                 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
 249
 250                 /* Register a workaround for errata */
 251                 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
 252                         (unsigned long long)res.start, 7);
 253                 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
 254
 255                 of_node_put(mdio);
 256         }
 257
 258         return 0;
 259 }
 260 machine_arch_initcall(mpc85xx_mds, board_fixups);
 261
 262 static struct of_device_id mpc85xx_ids[] = {
 263         { .type = "soc", },
 264         { .compatible = "soc", },
 265         { .compatible = "simple-bus", },
 266         { .type = "qe", },
 267         { .compatible = "fsl,qe", },
 268         {},
 269 };
 270
 271 static int __init mpc85xx_publish_devices(void)
 272 {
 273         /* Publish the QE devices */
 274         of_platform_bus_probe(NULL, mpc85xx_ids, NULL);
 275
 276         return 0;
 277 }
 278 machine_device_initcall(mpc85xx_mds, mpc85xx_publish_devices);
 279
 280 static void __init mpc85xx_mds_pic_init(void)
 281 {
 282         struct mpic *mpic;
 283         struct resource r;
 284         struct device_node *np = NULL;
 285
 286         np = of_find_node_by_type(NULL, "open-pic");
 287         if (!np)
 288                 return;
 289
 290         if (of_address_to_resource(np, 0, &r)) {
 291                 printk(KERN_ERR "Failed to map mpic register space\n");
 292                 of_node_put(np);
 293                 return;
 294         }
 295
 296         mpic = mpic_alloc(np, r.start,
 297                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
 298                         0, 256, " OpenPIC  ");
 299         BUG_ON(mpic == NULL);
 300         of_node_put(np);
 301
 302         mpic_init(mpic);
 303
 304 #ifdef CONFIG_QUICC_ENGINE
 305         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
 306         if (!np) {
 307                 np = of_find_node_by_type(NULL, "qeic");
 308                 if (!np)
 309                         return;
 310         }
 311         qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
 312         of_node_put(np);
 313 #endif                          /* CONFIG_QUICC_ENGINE */
 314 }
 315
 316 static int __init mpc85xx_mds_probe(void)
 317 {
 318         unsigned long root = of_get_flat_dt_root();
 319
 320         return of_flat_dt_is_compatible(root, "MPC85xxMDS");
 321 }
 322
 323 define_machine(mpc85xx_mds) {
 324         .name           = "MPC85xx MDS",
 325         .probe          = mpc85xx_mds_probe,
 326         .setup_arch     = mpc85xx_mds_setup_arch,
 327         .init_IRQ       = mpc85xx_mds_pic_init,
 328         .get_irq        = mpic_get_irq,
 329         .restart        = fsl_rstcr_restart,
 330         .calibrate_decr = generic_calibrate_decr,
 331         .progress       = udbg_progress,
 332 #ifdef CONFIG_PCI
 333         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 334 #endif
 335 };