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.h>
  26 #include <linux/of_platform.h>
  27 #include <linux/phy.h>
  28 #include <linux/phy_fixed.h>
  29 #include <linux/spi/spi.h>
  30 #include <linux/fsl_devices.h>
  31 #include <linux/fs_enet_pd.h>
  32 #include <linux/fs_uart_pd.h>
  33
  34 #include <asm/system.h>
  35 #include <asm/atomic.h>
  36 #include <asm/io.h>
  37 #include <asm/irq.h>
  38 #include <asm/time.h>
  39 #include <asm/prom.h>
  40 #include <sysdev/fsl_soc.h>
  41 #include <mm/mmu_decl.h>
  42 #include <asm/cpm2.h>
  43
  44 extern void init_fcc_ioports(struct fs_platform_info*);
  45 extern void init_fec_ioports(struct fs_platform_info*);
  46 extern void init_smc_ioports(struct fs_uart_platform_info*);
  47 static phys_addr_t immrbase = -1;
  48
  49 phys_addr_t get_immrbase(void)
  50 {
  51         struct device_node *soc;
  52
  53         if (immrbase != -1)
  54                 return immrbase;
  55
  56         soc = of_find_node_by_type(NULL, "soc");
  57         if (soc) {
  58                 int size;
  59                 u32 naddr;
  60                 const u32 *prop = of_get_property(soc, "#address-cells", &size);
  61
  62                 if (prop && size == 4)
  63                         naddr = *prop;
  64                 else
  65                         naddr = 2;
  66
  67                 prop = of_get_property(soc, "ranges", &size);
  68                 if (prop)
  69                         immrbase = of_translate_address(soc, prop + naddr);
  70
  71                 of_node_put(soc);
  72         }
  73
  74         return immrbase;
  75 }
  76
  77 EXPORT_SYMBOL(get_immrbase);
  78
  79 static u32 sysfreq = -1;
  80
  81 u32 fsl_get_sys_freq(void)
  82 {
  83         struct device_node *soc;
  84         const u32 *prop;
  85         int size;
  86
  87         if (sysfreq != -1)
  88                 return sysfreq;
  89
  90         soc = of_find_node_by_type(NULL, "soc");
  91         if (!soc)
  92                 return -1;
  93
  94         prop = of_get_property(soc, "clock-frequency", &size);
  95         if (!prop || size != sizeof(*prop) || *prop == 0)
  96                 prop = of_get_property(soc, "bus-frequency", &size);
  97
  98         if (prop && size == sizeof(*prop))
  99                 sysfreq = *prop;
 100
 101         of_node_put(soc);
 102         return sysfreq;
 103 }
 104 EXPORT_SYMBOL(fsl_get_sys_freq);
 105
 106 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
 107
 108 static u32 brgfreq = -1;
 109
 110 u32 get_brgfreq(void)
 111 {
 112         struct device_node *node;
 113         const unsigned int *prop;
 114         int size;
 115
 116         if (brgfreq != -1)
 117                 return brgfreq;
 118
 119         node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
 120         if (node) {
 121                 prop = of_get_property(node, "clock-frequency", &size);
 122                 if (prop && size == 4)
 123                         brgfreq = *prop;
 124
 125                 of_node_put(node);
 126                 return brgfreq;
 127         }
 128
 129         /* Legacy device binding -- will go away when no users are left. */
 130         node = of_find_node_by_type(NULL, "cpm");
 131         if (!node)
 132                 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
 133         if (!node)
 134                 node = of_find_node_by_type(NULL, "qe");
 135
 136         if (node) {
 137                 prop = of_get_property(node, "brg-frequency", &size);
 138                 if (prop && size == 4)
 139                         brgfreq = *prop;
 140
 141                 if (brgfreq == -1 || brgfreq == 0) {
 142                         prop = of_get_property(node, "bus-frequency", &size);
 143                         if (prop && size == 4)
 144                                 brgfreq = *prop / 2;
 145                 }
 146                 of_node_put(node);
 147         }
 148
 149         return brgfreq;
 150 }
 151
 152 EXPORT_SYMBOL(get_brgfreq);
 153
 154 static u32 fs_baudrate = -1;
 155
 156 u32 get_baudrate(void)
 157 {
 158         struct device_node *node;
 159
 160         if (fs_baudrate != -1)
 161                 return fs_baudrate;
 162
 163         node = of_find_node_by_type(NULL, "serial");
 164         if (node) {
 165                 int size;
 166                 const unsigned int *prop = of_get_property(node,
 167                                 "current-speed", &size);
 168
 169                 if (prop)
 170                         fs_baudrate = *prop;
 171                 of_node_put(node);
 172         }
 173
 174         return fs_baudrate;
 175 }
 176
 177 EXPORT_SYMBOL(get_baudrate);
 178 #endif /* CONFIG_CPM2 */
 179
 180 #ifdef CONFIG_FIXED_PHY
 181 static int __init of_add_fixed_phys(void)
 182 {
 183         int ret;
 184         struct device_node *np;
 185         u32 *fixed_link;
 186         struct fixed_phy_status status = {};
 187
 188         for_each_node_by_name(np, "ethernet") {
 189                 fixed_link  = (u32 *)of_get_property(np, "fixed-link", NULL);
 190                 if (!fixed_link)
 191                         continue;
 192
 193                 status.link = 1;
 194                 status.duplex = fixed_link[1];
 195                 status.speed = fixed_link[2];
 196                 status.pause = fixed_link[3];
 197                 status.asym_pause = fixed_link[4];
 198
 199                 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
 200                 if (ret) {
 201                         of_node_put(np);
 202                         return ret;
 203                 }
 204         }
 205
 206         return 0;
 207 }
 208 arch_initcall(of_add_fixed_phys);
 209 #endif /* CONFIG_FIXED_PHY */
 210
 211 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
 212 {
 213         if (!phy_type)
 214                 return FSL_USB2_PHY_NONE;
 215         if (!strcasecmp(phy_type, "ulpi"))
 216                 return FSL_USB2_PHY_ULPI;
 217         if (!strcasecmp(phy_type, "utmi"))
 218                 return FSL_USB2_PHY_UTMI;
 219         if (!strcasecmp(phy_type, "utmi_wide"))
 220                 return FSL_USB2_PHY_UTMI_WIDE;
 221         if (!strcasecmp(phy_type, "serial"))
 222                 return FSL_USB2_PHY_SERIAL;
 223
 224         return FSL_USB2_PHY_NONE;
 225 }
 226
 227 static int __init fsl_usb_of_init(void)
 228 {
 229         struct device_node *np;
 230         unsigned int i = 0;
 231         struct platform_device *usb_dev_mph = NULL, *usb_dev_dr_host = NULL,
 232                 *usb_dev_dr_client = NULL;
 233         int ret;
 234
 235         for_each_compatible_node(np, NULL, "fsl-usb2-mph") {
 236                 struct resource r[2];
 237                 struct fsl_usb2_platform_data usb_data;
 238                 const unsigned char *prop = NULL;
 239
 240                 memset(&r, 0, sizeof(r));
 241                 memset(&usb_data, 0, sizeof(usb_data));
 242
 243                 ret = of_address_to_resource(np, 0, &r[0]);
 244                 if (ret)
 245                         goto err;
 246
 247                 of_irq_to_resource(np, 0, &r[1]);
 248
 249                 usb_dev_mph =
 250                     platform_device_register_simple("fsl-ehci", i, r, 2);
 251                 if (IS_ERR(usb_dev_mph)) {
 252                         ret = PTR_ERR(usb_dev_mph);
 253                         goto err;
 254                 }
 255
 256                 usb_dev_mph->dev.coherent_dma_mask = 0xffffffffUL;
 257                 usb_dev_mph->dev.dma_mask = &usb_dev_mph->dev.coherent_dma_mask;
 258
 259                 usb_data.operating_mode = FSL_USB2_MPH_HOST;
 260
 261                 prop = of_get_property(np, "port0", NULL);
 262                 if (prop)
 263                         usb_data.port_enables |= FSL_USB2_PORT0_ENABLED;
 264
 265                 prop = of_get_property(np, "port1", NULL);
 266                 if (prop)
 267                         usb_data.port_enables |= FSL_USB2_PORT1_ENABLED;
 268
 269                 prop = of_get_property(np, "phy_type", NULL);
 270                 usb_data.phy_mode = determine_usb_phy(prop);
 271
 272                 ret =
 273                     platform_device_add_data(usb_dev_mph, &usb_data,
 274                                              sizeof(struct
 275                                                     fsl_usb2_platform_data));
 276                 if (ret)
 277                         goto unreg_mph;
 278                 i++;
 279         }
 280
 281         for_each_compatible_node(np, NULL, "fsl-usb2-dr") {
 282                 struct resource r[2];
 283                 struct fsl_usb2_platform_data usb_data;
 284                 const unsigned char *prop = NULL;
 285
 286                 if (!of_device_is_available(np))
 287                         continue;
 288
 289                 memset(&r, 0, sizeof(r));
 290                 memset(&usb_data, 0, sizeof(usb_data));
 291
 292                 ret = of_address_to_resource(np, 0, &r[0]);
 293                 if (ret)
 294                         goto unreg_mph;
 295
 296                 of_irq_to_resource(np, 0, &r[1]);
 297
 298                 prop = of_get_property(np, "dr_mode", NULL);
 299
 300                 if (!prop || !strcmp(prop, "host")) {
 301                         usb_data.operating_mode = FSL_USB2_DR_HOST;
 302                         usb_dev_dr_host = platform_device_register_simple(
 303                                         "fsl-ehci", i, r, 2);
 304                         if (IS_ERR(usb_dev_dr_host)) {
 305                                 ret = PTR_ERR(usb_dev_dr_host);
 306                                 goto err;
 307                         }
 308                 } else if (prop && !strcmp(prop, "peripheral")) {
 309                         usb_data.operating_mode = FSL_USB2_DR_DEVICE;
 310                         usb_dev_dr_client = platform_device_register_simple(
 311                                         "fsl-usb2-udc", i, r, 2);
 312                         if (IS_ERR(usb_dev_dr_client)) {
 313                                 ret = PTR_ERR(usb_dev_dr_client);
 314                                 goto err;
 315                         }
 316                 } else if (prop && !strcmp(prop, "otg")) {
 317                         usb_data.operating_mode = FSL_USB2_DR_OTG;
 318                         usb_dev_dr_host = platform_device_register_simple(
 319                                         "fsl-ehci", i, r, 2);
 320                         if (IS_ERR(usb_dev_dr_host)) {
 321                                 ret = PTR_ERR(usb_dev_dr_host);
 322                                 goto err;
 323                         }
 324                         usb_dev_dr_client = platform_device_register_simple(
 325                                         "fsl-usb2-udc", i, r, 2);
 326                         if (IS_ERR(usb_dev_dr_client)) {
 327                                 ret = PTR_ERR(usb_dev_dr_client);
 328                                 goto err;
 329                         }
 330                 } else {
 331                         ret = -EINVAL;
 332                         goto err;
 333                 }
 334
 335                 prop = of_get_property(np, "phy_type", NULL);
 336                 usb_data.phy_mode = determine_usb_phy(prop);
 337
 338                 if (usb_dev_dr_host) {
 339                         usb_dev_dr_host->dev.coherent_dma_mask = 0xffffffffUL;
 340                         usb_dev_dr_host->dev.dma_mask = &usb_dev_dr_host->
 341                                 dev.coherent_dma_mask;
 342                         if ((ret = platform_device_add_data(usb_dev_dr_host,
 343                                                 &usb_data, sizeof(struct
 344                                                 fsl_usb2_platform_data))))
 345                                 goto unreg_dr;
 346                 }
 347                 if (usb_dev_dr_client) {
 348                         usb_dev_dr_client->dev.coherent_dma_mask = 0xffffffffUL;
 349                         usb_dev_dr_client->dev.dma_mask = &usb_dev_dr_client->
 350                                 dev.coherent_dma_mask;
 351                         if ((ret = platform_device_add_data(usb_dev_dr_client,
 352                                                 &usb_data, sizeof(struct
 353                                                 fsl_usb2_platform_data))))
 354                                 goto unreg_dr;
 355                 }
 356                 i++;
 357         }
 358         return 0;
 359
 360 unreg_dr:
 361         if (usb_dev_dr_host)
 362                 platform_device_unregister(usb_dev_dr_host);
 363         if (usb_dev_dr_client)
 364                 platform_device_unregister(usb_dev_dr_client);
 365 unreg_mph:
 366         if (usb_dev_mph)
 367                 platform_device_unregister(usb_dev_mph);
 368 err:
 369         return ret;
 370 }
 371
 372 arch_initcall(fsl_usb_of_init);
 373
 374 #if defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_86xx)
 375 static __be32 __iomem *rstcr;
 376
 377 static int __init setup_rstcr(void)
 378 {
 379         struct device_node *np;
 380         np = of_find_node_by_name(NULL, "global-utilities");
 381         if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
 382                 const u32 *prop = of_get_property(np, "reg", NULL);
 383                 if (prop) {
 384                         /* map reset control register
 385                          * 0xE00B0 is offset of reset control register
 386                          */
 387                         rstcr = ioremap(get_immrbase() + *prop + 0xB0, 0xff);
 388                         if (!rstcr)
 389                                 printk (KERN_EMERG "Error: reset control "
 390                                                 "register not mapped!\n");
 391                 }
 392         } else
 393                 printk (KERN_INFO "rstcr compatible register does not exist!\n");
 394         if (np)
 395                 of_node_put(np);
 396         return 0;
 397 }
 398
 399 arch_initcall(setup_rstcr);
 400
 401 void fsl_rstcr_restart(char *cmd)
 402 {
 403         local_irq_disable();
 404         if (rstcr)
 405                 /* set reset control register */
 406                 out_be32(rstcr, 0x2);   /* HRESET_REQ */
 407
 408         while (1) ;
 409 }
 410 #endif
 411
 412 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
 413 struct platform_diu_data_ops diu_ops;
 414 EXPORT_SYMBOL(diu_ops);
 415 #endif