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

   1 /*
   2  * Copyright (C) 2006-2010, 2012-2013 Freescale Semiconductor, 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 #include <linux/fsl/guts.h>
  38
  39 #include <linux/atomic.h>
  40 #include <asm/time.h>
  41 #include <asm/io.h>
  42 #include <asm/machdep.h>
  43 #include <asm/pci-bridge.h>
  44 #include <asm/irq.h>
  45 #include <mm/mmu_decl.h>
  46 #include <asm/prom.h>
  47 #include <asm/udbg.h>
  48 #include <sysdev/fsl_soc.h>
  49 #include <sysdev/fsl_pci.h>
  50 #include <sysdev/simple_gpio.h>
  51 #include <soc/fsl/qe/qe.h>
  52 #include <soc/fsl/qe/qe_ic.h>
  53 #include <asm/mpic.h>
  54 #include <asm/swiotlb.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 #if IS_BUILTIN(CONFIG_PHYLIB)
  67
  68 #define MV88E1111_SCR   0x10
  69 #define MV88E1111_SCR_125CLK    0x0010
  70 static int mpc8568_fixup_125_clock(struct phy_device *phydev)
  71 {
  72         int scr;
  73         int err;
  74
  75         /* Workaround for the 125 CLK Toggle */
  76         scr = phy_read(phydev, MV88E1111_SCR);
  77
  78         if (scr < 0)
  79                 return scr;
  80
  81         err = phy_write(phydev, MV88E1111_SCR, scr & ~(MV88E1111_SCR_125CLK));
  82
  83         if (err)
  84                 return err;
  85
  86         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
  87
  88         if (err)
  89                 return err;
  90
  91         scr = phy_read(phydev, MV88E1111_SCR);
  92
  93         if (scr < 0)
  94                 return scr;
  95
  96         err = phy_write(phydev, MV88E1111_SCR, scr | 0x0008);
  97
  98         return err;
  99 }
 100
 101 static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
 102 {
 103         int temp;
 104         int err;
 105
 106         /* Errata */
 107         err = phy_write(phydev,29, 0x0006);
 108
 109         if (err)
 110                 return err;
 111
 112         temp = phy_read(phydev, 30);
 113
 114         if (temp < 0)
 115                 return temp;
 116
 117         temp = (temp & (~0x8000)) | 0x4000;
 118         err = phy_write(phydev,30, temp);
 119
 120         if (err)
 121                 return err;
 122
 123         err = phy_write(phydev,29, 0x000a);
 124
 125         if (err)
 126                 return err;
 127
 128         temp = phy_read(phydev, 30);
 129
 130         if (temp < 0)
 131                 return temp;
 132
 133         temp = phy_read(phydev, 30);
 134
 135         if (temp < 0)
 136                 return temp;
 137
 138         temp &= ~0x0020;
 139
 140         err = phy_write(phydev,30,temp);
 141
 142         if (err)
 143                 return err;
 144
 145         /* Disable automatic MDI/MDIX selection */
 146         temp = phy_read(phydev, 16);
 147
 148         if (temp < 0)
 149                 return temp;
 150
 151         temp &= ~0x0060;
 152         err = phy_write(phydev,16,temp);
 153
 154         return err;
 155 }
 156
 157 #endif
 158
 159 /* ************************************************************************
 160  *
 161  * Setup the architecture
 162  *
 163  */
 164 #ifdef CONFIG_QUICC_ENGINE
 165 static void __init mpc85xx_mds_reset_ucc_phys(void)
 166 {
 167         struct device_node *np;
 168         static u8 __iomem *bcsr_regs;
 169
 170         /* Map BCSR area */
 171         np = of_find_node_by_name(NULL, "bcsr");
 172         if (!np)
 173                 return;
 174
 175         bcsr_regs = of_iomap(np, 0);
 176         of_node_put(np);
 177         if (!bcsr_regs)
 178                 return;
 179
 180         if (machine_is(mpc8568_mds)) {
 181 #define BCSR_UCC1_GETH_EN       (0x1 << 7)
 182 #define BCSR_UCC2_GETH_EN       (0x1 << 7)
 183 #define BCSR_UCC1_MODE_MSK      (0x3 << 4)
 184 #define BCSR_UCC2_MODE_MSK      (0x3 << 0)
 185
 186                 /* Turn off UCC1 & UCC2 */
 187                 clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
 188                 clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
 189
 190                 /* Mode is RGMII, all bits clear */
 191                 clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
 192                                          BCSR_UCC2_MODE_MSK);
 193
 194                 /* Turn UCC1 & UCC2 on */
 195                 setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
 196                 setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
 197         } else if (machine_is(mpc8569_mds)) {
 198 #define BCSR7_UCC12_GETHnRST    (0x1 << 2)
 199 #define BCSR8_UEM_MARVELL_RST   (0x1 << 1)
 200 #define BCSR_UCC_RGMII          (0x1 << 6)
 201 #define BCSR_UCC_RTBI           (0x1 << 5)
 202                 /*
 203                  * U-Boot mangles interrupt polarity for Marvell PHYs,
 204                  * so reset built-in and UEM Marvell PHYs, this puts
 205                  * the PHYs into their normal state.
 206                  */
 207                 clrbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
 208                 setbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
 209
 210                 setbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
 211                 clrbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
 212
 213                 for_each_compatible_node(np, "network", "ucc_geth") {
 214                         const unsigned int *prop;
 215                         int ucc_num;
 216
 217                         prop = of_get_property(np, "cell-index", NULL);
 218                         if (prop == NULL)
 219                                 continue;
 220
 221                         ucc_num = *prop - 1;
 222
 223                         prop = of_get_property(np, "phy-connection-type", NULL);
 224                         if (prop == NULL)
 225                                 continue;
 226
 227                         if (strcmp("rtbi", (const char *)prop) == 0)
 228                                 clrsetbits_8(&bcsr_regs[7 + ucc_num],
 229                                         BCSR_UCC_RGMII, BCSR_UCC_RTBI);
 230                 }
 231         } else if (machine_is(p1021_mds)) {
 232 #define BCSR11_ENET_MICRST     (0x1 << 5)
 233                 /* Reset Micrel PHY */
 234                 clrbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
 235                 setbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
 236         }
 237
 238         iounmap(bcsr_regs);
 239 }
 240
 241 static void __init mpc85xx_mds_qe_init(void)
 242 {
 243         struct device_node *np;
 244
 245         mpc85xx_qe_init();
 246         mpc85xx_qe_par_io_init();
 247         mpc85xx_mds_reset_ucc_phys();
 248
 249         if (machine_is(p1021_mds)) {
 250
 251                 struct ccsr_guts __iomem *guts;
 252
 253                 np = of_find_node_by_name(NULL, "global-utilities");
 254                 if (np) {
 255                         guts = of_iomap(np, 0);
 256                         if (!guts)
 257                                 pr_err("mpc85xx-rdb: could not map global utilities register\n");
 258                         else{
 259                         /* P1021 has pins muxed for QE and other functions. To
 260                          * enable QE UEC mode, we need to set bit QE0 for UCC1
 261                          * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9
 262                          * and QE12 for QE MII management signals in PMUXCR
 263                          * register.
 264                          */
 265                                 setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) |
 266                                                   MPC85xx_PMUXCR_QE(3) |
 267                                                   MPC85xx_PMUXCR_QE(9) |
 268                                                   MPC85xx_PMUXCR_QE(12));
 269                                 iounmap(guts);
 270                         }
 271                         of_node_put(np);
 272                 }
 273
 274         }
 275 }
 276
 277 static void __init mpc85xx_mds_qeic_init(void)
 278 {
 279         struct device_node *np;
 280
 281         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
 282         if (!of_device_is_available(np)) {
 283                 of_node_put(np);
 284                 return;
 285         }
 286
 287         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
 288         if (!np) {
 289                 np = of_find_node_by_type(NULL, "qeic");
 290                 if (!np)
 291                         return;
 292         }
 293
 294         if (machine_is(p1021_mds))
 295                 qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
 296                                 qe_ic_cascade_high_mpic);
 297         else
 298                 qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
 299         of_node_put(np);
 300 }
 301 #else
 302 static void __init mpc85xx_mds_qe_init(void) { }
 303 static void __init mpc85xx_mds_qeic_init(void) { }
 304 #endif  /* CONFIG_QUICC_ENGINE */
 305
 306 static void __init mpc85xx_mds_setup_arch(void)
 307 {
 308         if (ppc_md.progress)
 309                 ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
 310
 311         mpc85xx_smp_init();
 312
 313         mpc85xx_mds_qe_init();
 314
 315         fsl_pci_assign_primary();
 316
 317         swiotlb_detect_4g();
 318 }
 319
 320 #if IS_BUILTIN(CONFIG_PHYLIB)
 321
 322 static int __init board_fixups(void)
 323 {
 324         char phy_id[20];
 325         char *compstrs[2] = {"fsl,gianfar-mdio", "fsl,ucc-mdio"};
 326         struct device_node *mdio;
 327         struct resource res;
 328         int i;
 329
 330         for (i = 0; i < ARRAY_SIZE(compstrs); i++) {
 331                 mdio = of_find_compatible_node(NULL, NULL, compstrs[i]);
 332
 333                 of_address_to_resource(mdio, 0, &res);
 334                 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
 335                         (unsigned long long)res.start, 1);
 336
 337                 phy_register_fixup_for_id(phy_id, mpc8568_fixup_125_clock);
 338                 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
 339
 340                 /* Register a workaround for errata */
 341                 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
 342                         (unsigned long long)res.start, 7);
 343                 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
 344
 345                 of_node_put(mdio);
 346         }
 347
 348         return 0;
 349 }
 350
 351 machine_arch_initcall(mpc8568_mds, board_fixups);
 352 machine_arch_initcall(mpc8569_mds, board_fixups);
 353
 354 #endif
 355
 356 static int __init mpc85xx_publish_devices(void)
 357 {
 358         if (machine_is(mpc8568_mds))
 359                 simple_gpiochip_init("fsl,mpc8568mds-bcsr-gpio");
 360         if (machine_is(mpc8569_mds))
 361                 simple_gpiochip_init("fsl,mpc8569mds-bcsr-gpio");
 362
 363         return mpc85xx_common_publish_devices();
 364 }
 365
 366 machine_arch_initcall(mpc8568_mds, mpc85xx_publish_devices);
 367 machine_arch_initcall(mpc8569_mds, mpc85xx_publish_devices);
 368 machine_arch_initcall(p1021_mds, mpc85xx_common_publish_devices);
 369
 370 static void __init mpc85xx_mds_pic_init(void)
 371 {
 372         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 373                         MPIC_SINGLE_DEST_CPU,
 374                         0, 256, " OpenPIC  ");
 375         BUG_ON(mpic == NULL);
 376
 377         mpic_init(mpic);
 378         mpc85xx_mds_qeic_init();
 379 }
 380
 381 static int __init mpc85xx_mds_probe(void)
 382 {
 383         return of_machine_is_compatible("MPC85xxMDS");
 384 }
 385
 386 define_machine(mpc8568_mds) {
 387         .name           = "MPC8568 MDS",
 388         .probe          = mpc85xx_mds_probe,
 389         .setup_arch     = mpc85xx_mds_setup_arch,
 390         .init_IRQ       = mpc85xx_mds_pic_init,
 391         .get_irq        = mpic_get_irq,
 392         .calibrate_decr = generic_calibrate_decr,
 393         .progress       = udbg_progress,
 394 #ifdef CONFIG_PCI
 395         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 396         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 397 #endif
 398 };
 399
 400 static int __init mpc8569_mds_probe(void)
 401 {
 402         return of_machine_is_compatible("fsl,MPC8569EMDS");
 403 }
 404
 405 define_machine(mpc8569_mds) {
 406         .name           = "MPC8569 MDS",
 407         .probe          = mpc8569_mds_probe,
 408         .setup_arch     = mpc85xx_mds_setup_arch,
 409         .init_IRQ       = mpc85xx_mds_pic_init,
 410         .get_irq        = mpic_get_irq,
 411         .calibrate_decr = generic_calibrate_decr,
 412         .progress       = udbg_progress,
 413 #ifdef CONFIG_PCI
 414         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 415         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 416 #endif
 417 };
 418
 419 static int __init p1021_mds_probe(void)
 420 {
 421         return of_machine_is_compatible("fsl,P1021MDS");
 422
 423 }
 424
 425 define_machine(p1021_mds) {
 426         .name           = "P1021 MDS",
 427         .probe          = p1021_mds_probe,
 428         .setup_arch     = mpc85xx_mds_setup_arch,
 429         .init_IRQ       = mpc85xx_mds_pic_init,
 430         .get_irq        = mpic_get_irq,
 431         .calibrate_decr = generic_calibrate_decr,
 432         .progress       = udbg_progress,
 433 #ifdef CONFIG_PCI
 434         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 435         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 436 #endif
 437 };