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

   1 /*
   2  * Copyright (C) 2006-2010, 2012 Freescale Semicondutor, Inc.
   3  * All rights reserved.
   4  *
   5  * Author: Andy Fleming <afleming@freescale.com>
   6  *
   7  * Based on 83xx/mpc8360e_pb.c by:
   8  *         Li Yang <LeoLi@freescale.com>
   9  *         Yin Olivia <Hong-hua.Yin@freescale.com>
  10  *
  11  * Description:
  12  * MPC85xx MDS board specific routines.
  13  *
  14  * This program is free software; you can redistribute  it and/or modify it
  15  * under  the terms of  the GNU General  Public License as published by the
  16  * Free Software Foundation;  either version 2 of the  License, or (at your
  17  * option) any later version.
  18  */
  19
  20 #include <linux/stddef.h>
  21 #include <linux/kernel.h>
  22 #include <linux/init.h>
  23 #include <linux/errno.h>
  24 #include <linux/reboot.h>
  25 #include <linux/pci.h>
  26 #include <linux/kdev_t.h>
  27 #include <linux/major.h>
  28 #include <linux/console.h>
  29 #include <linux/delay.h>
  30 #include <linux/seq_file.h>
  31 #include <linux/initrd.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 #include <linux/memblock.h>
  37
  38 #include <linux/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 <sysdev/simple_gpio.h>
  50 #include <asm/qe.h>
  51 #include <asm/qe_ic.h>
  52 #include <asm/mpic.h>
  53 #include <asm/swiotlb.h>
  54 #include <asm/fsl_guts.h>
  55 #include "smp.h"
  56
  57 #include "mpc85xx.h"
  58
  59 #undef DEBUG
  60 #ifdef DEBUG
  61 #define DBG(fmt...) udbg_printf(fmt)
  62 #else
  63 #define DBG(fmt...)
  64 #endif
  65
  66 #define MV88E1111_SCR   0x10
  67 #define MV88E1111_SCR_125CLK    0x0010
  68 static int mpc8568_fixup_125_clock(struct phy_device *phydev)
  69 {
  70         int scr;
  71         int err;
  72
  73         /* Workaround for the 125 CLK Toggle */
  74         scr = phy_read(phydev, MV88E1111_SCR);
  75
  76         if (scr < 0)
  77                 return scr;
  78
  79         err = phy_write(phydev, MV88E1111_SCR, scr & ~(MV88E1111_SCR_125CLK));
  80
  81         if (err)
  82                 return err;
  83
  84         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
  85
  86         if (err)
  87                 return err;
  88
  89         scr = phy_read(phydev, MV88E1111_SCR);
  90
  91         if (scr < 0)
  92                 return scr;
  93
  94         err = phy_write(phydev, MV88E1111_SCR, scr | 0x0008);
  95
  96         return err;
  97 }
  98
  99 static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
 100 {
 101         int temp;
 102         int err;
 103
 104         /* Errata */
 105         err = phy_write(phydev,29, 0x0006);
 106
 107         if (err)
 108                 return err;
 109
 110         temp = phy_read(phydev, 30);
 111
 112         if (temp < 0)
 113                 return temp;
 114
 115         temp = (temp & (~0x8000)) | 0x4000;
 116         err = phy_write(phydev,30, temp);
 117
 118         if (err)
 119                 return err;
 120
 121         err = phy_write(phydev,29, 0x000a);
 122
 123         if (err)
 124                 return err;
 125
 126         temp = phy_read(phydev, 30);
 127
 128         if (temp < 0)
 129                 return temp;
 130
 131         temp = phy_read(phydev, 30);
 132
 133         if (temp < 0)
 134                 return temp;
 135
 136         temp &= ~0x0020;
 137
 138         err = phy_write(phydev,30,temp);
 139
 140         if (err)
 141                 return err;
 142
 143         /* Disable automatic MDI/MDIX selection */
 144         temp = phy_read(phydev, 16);
 145
 146         if (temp < 0)
 147                 return temp;
 148
 149         temp &= ~0x0060;
 150         err = phy_write(phydev,16,temp);
 151
 152         return err;
 153 }
 154
 155 /* ************************************************************************
 156  *
 157  * Setup the architecture
 158  *
 159  */
 160 #ifdef CONFIG_QUICC_ENGINE
 161 static void __init mpc85xx_mds_reset_ucc_phys(void)
 162 {
 163         struct device_node *np;
 164         static u8 __iomem *bcsr_regs;
 165
 166         /* Map BCSR area */
 167         np = of_find_node_by_name(NULL, "bcsr");
 168         if (!np)
 169                 return;
 170
 171         bcsr_regs = of_iomap(np, 0);
 172         of_node_put(np);
 173         if (!bcsr_regs)
 174                 return;
 175
 176         if (machine_is(mpc8568_mds)) {
 177 #define BCSR_UCC1_GETH_EN       (0x1 << 7)
 178 #define BCSR_UCC2_GETH_EN       (0x1 << 7)
 179 #define BCSR_UCC1_MODE_MSK      (0x3 << 4)
 180 #define BCSR_UCC2_MODE_MSK      (0x3 << 0)
 181
 182                 /* Turn off UCC1 & UCC2 */
 183                 clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
 184                 clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
 185
 186                 /* Mode is RGMII, all bits clear */
 187                 clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
 188                                          BCSR_UCC2_MODE_MSK);
 189
 190                 /* Turn UCC1 & UCC2 on */
 191                 setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
 192                 setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
 193         } else if (machine_is(mpc8569_mds)) {
 194 #define BCSR7_UCC12_GETHnRST    (0x1 << 2)
 195 #define BCSR8_UEM_MARVELL_RST   (0x1 << 1)
 196 #define BCSR_UCC_RGMII          (0x1 << 6)
 197 #define BCSR_UCC_RTBI           (0x1 << 5)
 198                 /*
 199                  * U-Boot mangles interrupt polarity for Marvell PHYs,
 200                  * so reset built-in and UEM Marvell PHYs, this puts
 201                  * the PHYs into their normal state.
 202                  */
 203                 clrbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
 204                 setbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
 205
 206                 setbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
 207                 clrbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
 208
 209                 for (np = NULL; (np = of_find_compatible_node(np,
 210                                                 "network",
 211                                                 "ucc_geth")) != NULL;) {
 212                         const unsigned int *prop;
 213                         int ucc_num;
 214
 215                         prop = of_get_property(np, "cell-index", NULL);
 216                         if (prop == NULL)
 217                                 continue;
 218
 219                         ucc_num = *prop - 1;
 220
 221                         prop = of_get_property(np, "phy-connection-type", NULL);
 222                         if (prop == NULL)
 223                                 continue;
 224
 225                         if (strcmp("rtbi", (const char *)prop) == 0)
 226                                 clrsetbits_8(&bcsr_regs[7 + ucc_num],
 227                                         BCSR_UCC_RGMII, BCSR_UCC_RTBI);
 228                 }
 229         } else if (machine_is(p1021_mds)) {
 230 #define BCSR11_ENET_MICRST     (0x1 << 5)
 231                 /* Reset Micrel PHY */
 232                 clrbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
 233                 setbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
 234         }
 235
 236         iounmap(bcsr_regs);
 237 }
 238
 239 static void __init mpc85xx_mds_qe_init(void)
 240 {
 241         struct device_node *np;
 242
 243         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
 244         if (!np) {
 245                 np = of_find_node_by_name(NULL, "qe");
 246                 if (!np)
 247                         return;
 248         }
 249
 250         if (!of_device_is_available(np)) {
 251                 of_node_put(np);
 252                 return;
 253         }
 254
 255         qe_reset();
 256         of_node_put(np);
 257
 258         np = of_find_node_by_name(NULL, "par_io");
 259         if (np) {
 260                 struct device_node *ucc;
 261
 262                 par_io_init(np);
 263                 of_node_put(np);
 264
 265                 for_each_node_by_name(ucc, "ucc")
 266                         par_io_of_config(ucc);
 267         }
 268
 269         mpc85xx_mds_reset_ucc_phys();
 270
 271         if (machine_is(p1021_mds)) {
 272
 273                 struct ccsr_guts __iomem *guts;
 274
 275                 np = of_find_node_by_name(NULL, "global-utilities");
 276                 if (np) {
 277                         guts = of_iomap(np, 0);
 278                         if (!guts)
 279                                 pr_err("mpc85xx-rdb: could not map global utilities register\n");
 280                         else{
 281                         /* P1021 has pins muxed for QE and other functions. To
 282                          * enable QE UEC mode, we need to set bit QE0 for UCC1
 283                          * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9
 284                          * and QE12 for QE MII management signals in PMUXCR
 285                          * register.
 286                          */
 287                                 setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) |
 288                                                   MPC85xx_PMUXCR_QE(3) |
 289                                                   MPC85xx_PMUXCR_QE(9) |
 290                                                   MPC85xx_PMUXCR_QE(12));
 291                                 iounmap(guts);
 292                         }
 293                         of_node_put(np);
 294                 }
 295
 296         }
 297 }
 298
 299 static void __init mpc85xx_mds_qeic_init(void)
 300 {
 301         struct device_node *np;
 302
 303         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
 304         if (!of_device_is_available(np)) {
 305                 of_node_put(np);
 306                 return;
 307         }
 308
 309         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
 310         if (!np) {
 311                 np = of_find_node_by_type(NULL, "qeic");
 312                 if (!np)
 313                         return;
 314         }
 315
 316         if (machine_is(p1021_mds))
 317                 qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
 318                                 qe_ic_cascade_high_mpic);
 319         else
 320                 qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
 321         of_node_put(np);
 322 }
 323 #else
 324 static void __init mpc85xx_mds_qe_init(void) { }
 325 static void __init mpc85xx_mds_qeic_init(void) { }
 326 #endif  /* CONFIG_QUICC_ENGINE */
 327
 328 static void __init mpc85xx_mds_setup_arch(void)
 329 {
 330 #ifdef CONFIG_PCI
 331         struct pci_controller *hose;
 332         struct device_node *np;
 333 #endif
 334         dma_addr_t max = 0xffffffff;
 335
 336         if (ppc_md.progress)
 337                 ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
 338
 339 #ifdef CONFIG_PCI
 340         for_each_node_by_type(np, "pci") {
 341                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 342                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
 343                         struct resource rsrc;
 344                         of_address_to_resource(np, 0, &rsrc);
 345                         if ((rsrc.start & 0xfffff) == 0x8000)
 346                                 fsl_add_bridge(np, 1);
 347                         else
 348                                 fsl_add_bridge(np, 0);
 349
 350                         hose = pci_find_hose_for_OF_device(np);
 351                         max = min(max, hose->dma_window_base_cur +
 352                                         hose->dma_window_size);
 353                 }
 354         }
 355 #endif
 356
 357         mpc85xx_smp_init();
 358
 359         mpc85xx_mds_qe_init();
 360
 361 #ifdef CONFIG_SWIOTLB
 362         if (memblock_end_of_DRAM() > max) {
 363                 ppc_swiotlb_enable = 1;
 364                 set_pci_dma_ops(&swiotlb_dma_ops);
 365                 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
 366         }
 367 #endif
 368 }
 369
 370
 371 static int __init board_fixups(void)
 372 {
 373         char phy_id[20];
 374         char *compstrs[2] = {"fsl,gianfar-mdio", "fsl,ucc-mdio"};
 375         struct device_node *mdio;
 376         struct resource res;
 377         int i;
 378
 379         for (i = 0; i < ARRAY_SIZE(compstrs); i++) {
 380                 mdio = of_find_compatible_node(NULL, NULL, compstrs[i]);
 381
 382                 of_address_to_resource(mdio, 0, &res);
 383                 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
 384                         (unsigned long long)res.start, 1);
 385
 386                 phy_register_fixup_for_id(phy_id, mpc8568_fixup_125_clock);
 387                 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
 388
 389                 /* Register a workaround for errata */
 390                 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
 391                         (unsigned long long)res.start, 7);
 392                 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
 393
 394                 of_node_put(mdio);
 395         }
 396
 397         return 0;
 398 }
 399 machine_arch_initcall(mpc8568_mds, board_fixups);
 400 machine_arch_initcall(mpc8569_mds, board_fixups);
 401
 402 static int __init mpc85xx_publish_devices(void)
 403 {
 404         if (machine_is(mpc8568_mds))
 405                 simple_gpiochip_init("fsl,mpc8568mds-bcsr-gpio");
 406         if (machine_is(mpc8569_mds))
 407                 simple_gpiochip_init("fsl,mpc8569mds-bcsr-gpio");
 408
 409         return mpc85xx_common_publish_devices();
 410 }
 411
 412 machine_device_initcall(mpc8568_mds, mpc85xx_publish_devices);
 413 machine_device_initcall(mpc8569_mds, mpc85xx_publish_devices);
 414 machine_device_initcall(p1021_mds, mpc85xx_common_publish_devices);
 415
 416 machine_arch_initcall(mpc8568_mds, swiotlb_setup_bus_notifier);
 417 machine_arch_initcall(mpc8569_mds, swiotlb_setup_bus_notifier);
 418 machine_arch_initcall(p1021_mds, swiotlb_setup_bus_notifier);
 419
 420 static void __init mpc85xx_mds_pic_init(void)
 421 {
 422         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 423                         MPIC_SINGLE_DEST_CPU,
 424                         0, 256, " OpenPIC  ");
 425         BUG_ON(mpic == NULL);
 426
 427         mpic_init(mpic);
 428         mpc85xx_mds_qeic_init();
 429 }
 430
 431 static int __init mpc85xx_mds_probe(void)
 432 {
 433         unsigned long root = of_get_flat_dt_root();
 434
 435         return of_flat_dt_is_compatible(root, "MPC85xxMDS");
 436 }
 437
 438 define_machine(mpc8568_mds) {
 439         .name           = "MPC8568 MDS",
 440         .probe          = mpc85xx_mds_probe,
 441         .setup_arch     = mpc85xx_mds_setup_arch,
 442         .init_IRQ       = mpc85xx_mds_pic_init,
 443         .get_irq        = mpic_get_irq,
 444         .restart        = fsl_rstcr_restart,
 445         .calibrate_decr = generic_calibrate_decr,
 446         .progress       = udbg_progress,
 447 #ifdef CONFIG_PCI
 448         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 449 #endif
 450 };
 451
 452 static int __init mpc8569_mds_probe(void)
 453 {
 454         unsigned long root = of_get_flat_dt_root();
 455
 456         return of_flat_dt_is_compatible(root, "fsl,MPC8569EMDS");
 457 }
 458
 459 define_machine(mpc8569_mds) {
 460         .name           = "MPC8569 MDS",
 461         .probe          = mpc8569_mds_probe,
 462         .setup_arch     = mpc85xx_mds_setup_arch,
 463         .init_IRQ       = mpc85xx_mds_pic_init,
 464         .get_irq        = mpic_get_irq,
 465         .restart        = fsl_rstcr_restart,
 466         .calibrate_decr = generic_calibrate_decr,
 467         .progress       = udbg_progress,
 468 #ifdef CONFIG_PCI
 469         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 470 #endif
 471 };
 472
 473 static int __init p1021_mds_probe(void)
 474 {
 475         unsigned long root = of_get_flat_dt_root();
 476
 477         return of_flat_dt_is_compatible(root, "fsl,P1021MDS");
 478
 479 }
 480
 481 define_machine(p1021_mds) {
 482         .name           = "P1021 MDS",
 483         .probe          = p1021_mds_probe,
 484         .setup_arch     = mpc85xx_mds_setup_arch,
 485         .init_IRQ       = mpc85xx_mds_pic_init,
 486         .get_irq        = mpic_get_irq,
 487         .restart        = fsl_rstcr_restart,
 488         .calibrate_decr = generic_calibrate_decr,
 489         .progress       = udbg_progress,
 490 #ifdef CONFIG_PCI
 491         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 492 #endif
 493 };
 494