git.oblomov.eu Git - linux-2.6/blob - arch/powerpc/sysdev/fsl_soc.c

   1 /*
   2  * FSL SoC setup code
   3  *
   4  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
   5  *
   6  * 2006 (c) MontaVista Software, Inc.
   7  * Vitaly Bordug <vbordug@ru.mvista.com>
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <linux/stddef.h>
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/errno.h>
  19 #include <linux/major.h>
  20 #include <linux/delay.h>
  21 #include <linux/irq.h>
  22 #include <linux/module.h>
  23 #include <linux/device.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/of_platform.h>
  26 #include <linux/phy.h>
  27 #include <linux/phy_fixed.h>
  28 #include <linux/spi/spi.h>
  29 #include <linux/fsl_devices.h>
  30 #include <linux/fs_enet_pd.h>
  31 #include <linux/fs_uart_pd.h>
  32
  33 #include <asm/system.h>
  34 #include <asm/atomic.h>
  35 #include <asm/io.h>
  36 #include <asm/irq.h>
  37 #include <asm/time.h>
  38 #include <asm/prom.h>
  39 #include <sysdev/fsl_soc.h>
  40 #include <mm/mmu_decl.h>
  41 #include <asm/cpm2.h>
  42
  43 extern void init_fcc_ioports(struct fs_platform_info*);
  44 extern void init_fec_ioports(struct fs_platform_info*);
  45 extern void init_smc_ioports(struct fs_uart_platform_info*);
  46 static phys_addr_t immrbase = -1;
  47
  48 phys_addr_t get_immrbase(void)
  49 {
  50         struct device_node *soc;
  51
  52         if (immrbase != -1)
  53                 return immrbase;
  54
  55         soc = of_find_node_by_type(NULL, "soc");
  56         if (soc) {
  57                 int size;
  58                 u32 naddr;
  59                 const u32 *prop = of_get_property(soc, "#address-cells", &size);
  60
  61                 if (prop && size == 4)
  62                         naddr = *prop;
  63                 else
  64                         naddr = 2;
  65
  66                 prop = of_get_property(soc, "ranges", &size);
  67                 if (prop)
  68                         immrbase = of_translate_address(soc, prop + naddr);
  69
  70                 of_node_put(soc);
  71         }
  72
  73         return immrbase;
  74 }
  75
  76 EXPORT_SYMBOL(get_immrbase);
  77
  78 static u32 sysfreq = -1;
  79
  80 u32 fsl_get_sys_freq(void)
  81 {
  82         struct device_node *soc;
  83         const u32 *prop;
  84         int size;
  85
  86         if (sysfreq != -1)
  87                 return sysfreq;
  88
  89         soc = of_find_node_by_type(NULL, "soc");
  90         if (!soc)
  91                 return -1;
  92
  93         prop = of_get_property(soc, "clock-frequency", &size);
  94         if (!prop || size != sizeof(*prop) || *prop == 0)
  95                 prop = of_get_property(soc, "bus-frequency", &size);
  96
  97         if (prop && size == sizeof(*prop))
  98                 sysfreq = *prop;
  99
 100         of_node_put(soc);
 101         return sysfreq;
 102 }
 103 EXPORT_SYMBOL(fsl_get_sys_freq);
 104
 105 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
 106
 107 static u32 brgfreq = -1;
 108
 109 u32 get_brgfreq(void)
 110 {
 111         struct device_node *node;
 112         const unsigned int *prop;
 113         int size;
 114
 115         if (brgfreq != -1)
 116                 return brgfreq;
 117
 118         node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
 119         if (node) {
 120                 prop = of_get_property(node, "clock-frequency", &size);
 121                 if (prop && size == 4)
 122                         brgfreq = *prop;
 123
 124                 of_node_put(node);
 125                 return brgfreq;
 126         }
 127
 128         /* Legacy device binding -- will go away when no users are left. */
 129         node = of_find_node_by_type(NULL, "cpm");
 130         if (!node)
 131                 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
 132         if (!node)
 133                 node = of_find_node_by_type(NULL, "qe");
 134
 135         if (node) {
 136                 prop = of_get_property(node, "brg-frequency", &size);
 137                 if (prop && size == 4)
 138                         brgfreq = *prop;
 139
 140                 if (brgfreq == -1 || brgfreq == 0) {
 141                         prop = of_get_property(node, "bus-frequency", &size);
 142                         if (prop && size == 4)
 143                                 brgfreq = *prop / 2;
 144                 }
 145                 of_node_put(node);
 146         }
 147
 148         return brgfreq;
 149 }
 150
 151 EXPORT_SYMBOL(get_brgfreq);
 152
 153 static u32 fs_baudrate = -1;
 154
 155 u32 get_baudrate(void)
 156 {
 157         struct device_node *node;
 158
 159         if (fs_baudrate != -1)
 160                 return fs_baudrate;
 161
 162         node = of_find_node_by_type(NULL, "serial");
 163         if (node) {
 164                 int size;
 165                 const unsigned int *prop = of_get_property(node,
 166                                 "current-speed", &size);
 167
 168                 if (prop)
 169                         fs_baudrate = *prop;
 170                 of_node_put(node);
 171         }
 172
 173         return fs_baudrate;
 174 }
 175
 176 EXPORT_SYMBOL(get_baudrate);
 177 #endif /* CONFIG_CPM2 */
 178
 179 #ifdef CONFIG_FIXED_PHY
 180 static int __init of_add_fixed_phys(void)
 181 {
 182         int ret;
 183         struct device_node *np;
 184         u32 *fixed_link;
 185         struct fixed_phy_status status = {};
 186
 187         for_each_node_by_name(np, "ethernet") {
 188                 fixed_link  = (u32 *)of_get_property(np, "fixed-link", NULL);
 189                 if (!fixed_link)
 190                         continue;
 191
 192                 status.link = 1;
 193                 status.duplex = fixed_link[1];
 194                 status.speed = fixed_link[2];
 195                 status.pause = fixed_link[3];
 196                 status.asym_pause = fixed_link[4];
 197
 198                 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
 199                 if (ret) {
 200                         of_node_put(np);
 201                         return ret;
 202                 }
 203         }
 204
 205         return 0;
 206 }
 207 arch_initcall(of_add_fixed_phys);
 208 #endif /* CONFIG_FIXED_PHY */
 209
 210 #ifdef CONFIG_PPC_83xx
 211 static int __init mpc83xx_wdt_init(void)
 212 {
 213         struct resource r;
 214         struct device_node *np;
 215         struct platform_device *dev;
 216         u32 freq = fsl_get_sys_freq();
 217         int ret;
 218
 219         np = of_find_compatible_node(NULL, "watchdog", "mpc83xx_wdt");
 220
 221         if (!np) {
 222                 ret = -ENODEV;
 223                 goto nodev;
 224         }
 225
 226         memset(&r, 0, sizeof(r));
 227
 228         ret = of_address_to_resource(np, 0, &r);
 229         if (ret)
 230                 goto err;
 231
 232         dev = platform_device_register_simple("mpc83xx_wdt", 0, &r, 1);
 233         if (IS_ERR(dev)) {
 234                 ret = PTR_ERR(dev);
 235                 goto err;
 236         }
 237
 238         ret = platform_device_add_data(dev, &freq, sizeof(freq));
 239         if (ret)
 240                 goto unreg;
 241
 242         of_node_put(np);
 243         return 0;
 244
 245 unreg:
 246         platform_device_unregister(dev);
 247 err:
 248         of_node_put(np);
 249 nodev:
 250         return ret;
 251 }
 252
 253 arch_initcall(mpc83xx_wdt_init);
 254 #endif
 255
 256 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
 257 {
 258         if (!phy_type)
 259                 return FSL_USB2_PHY_NONE;
 260         if (!strcasecmp(phy_type, "ulpi"))
 261                 return FSL_USB2_PHY_ULPI;
 262         if (!strcasecmp(phy_type, "utmi"))
 263                 return FSL_USB2_PHY_UTMI;
 264         if (!strcasecmp(phy_type, "utmi_wide"))
 265                 return FSL_USB2_PHY_UTMI_WIDE;
 266         if (!strcasecmp(phy_type, "serial"))
 267                 return FSL_USB2_PHY_SERIAL;
 268
 269         return FSL_USB2_PHY_NONE;
 270 }
 271
 272 static int __init fsl_usb_of_init(void)
 273 {
 274         struct device_node *np;
 275         unsigned int i = 0;
 276         struct platform_device *usb_dev_mph = NULL, *usb_dev_dr_host = NULL,
 277                 *usb_dev_dr_client = NULL;
 278         int ret;
 279
 280         for_each_compatible_node(np, NULL, "fsl-usb2-mph") {
 281                 struct resource r[2];
 282                 struct fsl_usb2_platform_data usb_data;
 283                 const unsigned char *prop = NULL;
 284
 285                 memset(&r, 0, sizeof(r));
 286                 memset(&usb_data, 0, sizeof(usb_data));
 287
 288                 ret = of_address_to_resource(np, 0, &r[0]);
 289                 if (ret)
 290                         goto err;
 291
 292                 of_irq_to_resource(np, 0, &r[1]);
 293
 294                 usb_dev_mph =
 295                     platform_device_register_simple("fsl-ehci", i, r, 2);
 296                 if (IS_ERR(usb_dev_mph)) {
 297                         ret = PTR_ERR(usb_dev_mph);
 298                         goto err;
 299                 }
 300
 301                 usb_dev_mph->dev.coherent_dma_mask = 0xffffffffUL;
 302                 usb_dev_mph->dev.dma_mask = &usb_dev_mph->dev.coherent_dma_mask;
 303
 304                 usb_data.operating_mode = FSL_USB2_MPH_HOST;
 305
 306                 prop = of_get_property(np, "port0", NULL);
 307                 if (prop)
 308                         usb_data.port_enables |= FSL_USB2_PORT0_ENABLED;
 309
 310                 prop = of_get_property(np, "port1", NULL);
 311                 if (prop)
 312                         usb_data.port_enables |= FSL_USB2_PORT1_ENABLED;
 313
 314                 prop = of_get_property(np, "phy_type", NULL);
 315                 usb_data.phy_mode = determine_usb_phy(prop);
 316
 317                 ret =
 318                     platform_device_add_data(usb_dev_mph, &usb_data,
 319                                              sizeof(struct
 320                                                     fsl_usb2_platform_data));
 321                 if (ret)
 322                         goto unreg_mph;
 323                 i++;
 324         }
 325
 326         for_each_compatible_node(np, NULL, "fsl-usb2-dr") {
 327                 struct resource r[2];
 328                 struct fsl_usb2_platform_data usb_data;
 329                 const unsigned char *prop = NULL;
 330
 331                 memset(&r, 0, sizeof(r));
 332                 memset(&usb_data, 0, sizeof(usb_data));
 333
 334                 ret = of_address_to_resource(np, 0, &r[0]);
 335                 if (ret)
 336                         goto unreg_mph;
 337
 338                 of_irq_to_resource(np, 0, &r[1]);
 339
 340                 prop = of_get_property(np, "dr_mode", NULL);
 341
 342                 if (!prop || !strcmp(prop, "host")) {
 343                         usb_data.operating_mode = FSL_USB2_DR_HOST;
 344                         usb_dev_dr_host = platform_device_register_simple(
 345                                         "fsl-ehci", i, r, 2);
 346                         if (IS_ERR(usb_dev_dr_host)) {
 347                                 ret = PTR_ERR(usb_dev_dr_host);
 348                                 goto err;
 349                         }
 350                 } else if (prop && !strcmp(prop, "peripheral")) {
 351                         usb_data.operating_mode = FSL_USB2_DR_DEVICE;
 352                         usb_dev_dr_client = platform_device_register_simple(
 353                                         "fsl-usb2-udc", i, r, 2);
 354                         if (IS_ERR(usb_dev_dr_client)) {
 355                                 ret = PTR_ERR(usb_dev_dr_client);
 356                                 goto err;
 357                         }
 358                 } else if (prop && !strcmp(prop, "otg")) {
 359                         usb_data.operating_mode = FSL_USB2_DR_OTG;
 360                         usb_dev_dr_host = platform_device_register_simple(
 361                                         "fsl-ehci", i, r, 2);
 362                         if (IS_ERR(usb_dev_dr_host)) {
 363                                 ret = PTR_ERR(usb_dev_dr_host);
 364                                 goto err;
 365                         }
 366                         usb_dev_dr_client = platform_device_register_simple(
 367                                         "fsl-usb2-udc", i, r, 2);
 368                         if (IS_ERR(usb_dev_dr_client)) {
 369                                 ret = PTR_ERR(usb_dev_dr_client);
 370                                 goto err;
 371                         }
 372                 } else {
 373                         ret = -EINVAL;
 374                         goto err;
 375                 }
 376
 377                 prop = of_get_property(np, "phy_type", NULL);
 378                 usb_data.phy_mode = determine_usb_phy(prop);
 379
 380                 if (usb_dev_dr_host) {
 381                         usb_dev_dr_host->dev.coherent_dma_mask = 0xffffffffUL;
 382                         usb_dev_dr_host->dev.dma_mask = &usb_dev_dr_host->
 383                                 dev.coherent_dma_mask;
 384                         if ((ret = platform_device_add_data(usb_dev_dr_host,
 385                                                 &usb_data, sizeof(struct
 386                                                 fsl_usb2_platform_data))))
 387                                 goto unreg_dr;
 388                 }
 389                 if (usb_dev_dr_client) {
 390                         usb_dev_dr_client->dev.coherent_dma_mask = 0xffffffffUL;
 391                         usb_dev_dr_client->dev.dma_mask = &usb_dev_dr_client->
 392                                 dev.coherent_dma_mask;
 393                         if ((ret = platform_device_add_data(usb_dev_dr_client,
 394                                                 &usb_data, sizeof(struct
 395                                                 fsl_usb2_platform_data))))
 396                                 goto unreg_dr;
 397                 }
 398                 i++;
 399         }
 400         return 0;
 401
 402 unreg_dr:
 403         if (usb_dev_dr_host)
 404                 platform_device_unregister(usb_dev_dr_host);
 405         if (usb_dev_dr_client)
 406                 platform_device_unregister(usb_dev_dr_client);
 407 unreg_mph:
 408         if (usb_dev_mph)
 409                 platform_device_unregister(usb_dev_mph);
 410 err:
 411         return ret;
 412 }
 413
 414 arch_initcall(fsl_usb_of_init);
 415
 416 static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
 417                                    struct spi_board_info *board_infos,
 418                                    unsigned int num_board_infos,
 419                                    void (*activate_cs)(u8 cs, u8 polarity),
 420                                    void (*deactivate_cs)(u8 cs, u8 polarity))
 421 {
 422         struct device_node *np;
 423         unsigned int i = 0;
 424
 425         for_each_compatible_node(np, type, compatible) {
 426                 int ret;
 427                 unsigned int j;
 428                 const void *prop;
 429                 struct resource res[2];
 430                 struct platform_device *pdev;
 431                 struct fsl_spi_platform_data pdata = {
 432                         .activate_cs = activate_cs,
 433                         .deactivate_cs = deactivate_cs,
 434                 };
 435
 436                 memset(res, 0, sizeof(res));
 437
 438                 pdata.sysclk = sysclk;
 439
 440                 prop = of_get_property(np, "reg", NULL);
 441                 if (!prop)
 442                         goto err;
 443                 pdata.bus_num = *(u32 *)prop;
 444
 445                 prop = of_get_property(np, "cell-index", NULL);
 446                 if (prop)
 447                         i = *(u32 *)prop;
 448
 449                 prop = of_get_property(np, "mode", NULL);
 450                 if (prop && !strcmp(prop, "cpu-qe"))
 451                         pdata.qe_mode = 1;
 452
 453                 for (j = 0; j < num_board_infos; j++) {
 454                         if (board_infos[j].bus_num == pdata.bus_num)
 455                                 pdata.max_chipselect++;
 456                 }
 457
 458                 if (!pdata.max_chipselect)
 459                         continue;
 460
 461                 ret = of_address_to_resource(np, 0, &res[0]);
 462                 if (ret)
 463                         goto err;
 464
 465                 ret = of_irq_to_resource(np, 0, &res[1]);
 466                 if (ret == NO_IRQ)
 467                         goto err;
 468
 469                 pdev = platform_device_alloc("mpc83xx_spi", i);
 470                 if (!pdev)
 471                         goto err;
 472
 473                 ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
 474                 if (ret)
 475                         goto unreg;
 476
 477                 ret = platform_device_add_resources(pdev, res,
 478                                                     ARRAY_SIZE(res));
 479                 if (ret)
 480                         goto unreg;
 481
 482                 ret = platform_device_add(pdev);
 483                 if (ret)
 484                         goto unreg;
 485
 486                 goto next;
 487 unreg:
 488                 platform_device_del(pdev);
 489 err:
 490                 pr_err("%s: registration failed\n", np->full_name);
 491 next:
 492                 i++;
 493         }
 494
 495         return i;
 496 }
 497
 498 int __init fsl_spi_init(struct spi_board_info *board_infos,
 499                         unsigned int num_board_infos,
 500                         void (*activate_cs)(u8 cs, u8 polarity),
 501                         void (*deactivate_cs)(u8 cs, u8 polarity))
 502 {
 503         u32 sysclk = -1;
 504         int ret;
 505
 506 #ifdef CONFIG_QUICC_ENGINE
 507         /* SPI controller is either clocked from QE or SoC clock */
 508         sysclk = get_brgfreq();
 509 #endif
 510         if (sysclk == -1) {
 511                 sysclk = fsl_get_sys_freq();
 512                 if (sysclk == -1)
 513                         return -ENODEV;
 514         }
 515
 516         ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
 517                                num_board_infos, activate_cs, deactivate_cs);
 518         if (!ret)
 519                 of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
 520                                  num_board_infos, activate_cs, deactivate_cs);
 521
 522         return spi_register_board_info(board_infos, num_board_infos);
 523 }
 524
 525 #if defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_86xx)
 526 static __be32 __iomem *rstcr;
 527
 528 static int __init setup_rstcr(void)
 529 {
 530         struct device_node *np;
 531         np = of_find_node_by_name(NULL, "global-utilities");
 532         if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
 533                 const u32 *prop = of_get_property(np, "reg", NULL);
 534                 if (prop) {
 535                         /* map reset control register
 536                          * 0xE00B0 is offset of reset control register
 537                          */
 538                         rstcr = ioremap(get_immrbase() + *prop + 0xB0, 0xff);
 539                         if (!rstcr)
 540                                 printk (KERN_EMERG "Error: reset control "
 541                                                 "register not mapped!\n");
 542                 }
 543         } else
 544                 printk (KERN_INFO "rstcr compatible register does not exist!\n");
 545         if (np)
 546                 of_node_put(np);
 547         return 0;
 548 }
 549
 550 arch_initcall(setup_rstcr);
 551
 552 void fsl_rstcr_restart(char *cmd)
 553 {
 554         local_irq_disable();
 555         if (rstcr)
 556                 /* set reset control register */
 557                 out_be32(rstcr, 0x2);   /* HRESET_REQ */
 558
 559         while (1) ;
 560 }
 561 #endif
 562
 563 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
 564 struct platform_diu_data_ops diu_ops;
 565 EXPORT_SYMBOL(diu_ops);
 566 #endif