release/src-rt-6.x.4708/linux/linux-2.6.36/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 <asm/machdep.h>
  41 #include <sysdev/fsl_soc.h>
  42 #include <mm/mmu_decl.h>
  43 #include <asm/cpm2.h>
  44
  45 extern void init_fcc_ioports(struct fs_platform_info*);
  46 extern void init_fec_ioports(struct fs_platform_info*);
  47 extern void init_smc_ioports(struct fs_uart_platform_info*);
  48 static phys_addr_t immrbase = -1;
  49
  50 phys_addr_t get_immrbase(void)
  51 {
  52         struct device_node *soc;
  53
  54         if (immrbase != -1)
  55                 return immrbase;
  56
  57         soc = of_find_node_by_type(NULL, "soc");
  58         if (soc) {
  59                 int size;
  60                 u32 naddr;
  61                 const u32 *prop = of_get_property(soc, "#address-cells", &size);
  62
  63                 if (prop && size == 4)
  64                         naddr = *prop;
  65                 else
  66                         naddr = 2;
  67
  68                 prop = of_get_property(soc, "ranges", &size);
  69                 if (prop)
  70                         immrbase = of_translate_address(soc, prop + naddr);
  71
  72                 of_node_put(soc);
  73         }
  74
  75         return immrbase;
  76 }
  77
  78 EXPORT_SYMBOL(get_immrbase);
  79
  80 static u32 sysfreq = -1;
  81
  82 u32 fsl_get_sys_freq(void)
  83 {
  84         struct device_node *soc;
  85         const u32 *prop;
  86         int size;
  87
  88         if (sysfreq != -1)
  89                 return sysfreq;
  90
  91         soc = of_find_node_by_type(NULL, "soc");
  92         if (!soc)
  93                 return -1;
  94
  95         prop = of_get_property(soc, "clock-frequency", &size);
  96         if (!prop || size != sizeof(*prop) || *prop == 0)
  97                 prop = of_get_property(soc, "bus-frequency", &size);
  98
  99         if (prop && size == sizeof(*prop))
 100                 sysfreq = *prop;
 101
 102         of_node_put(soc);
 103         return sysfreq;
 104 }
 105 EXPORT_SYMBOL(fsl_get_sys_freq);
 106
 107 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
 108
 109 static u32 brgfreq = -1;
 110
 111 u32 get_brgfreq(void)
 112 {
 113         struct device_node *node;
 114         const unsigned int *prop;
 115         int size;
 116
 117         if (brgfreq != -1)
 118                 return brgfreq;
 119
 120         node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
 121         if (node) {
 122                 prop = of_get_property(node, "clock-frequency", &size);
 123                 if (prop && size == 4)
 124                         brgfreq = *prop;
 125
 126                 of_node_put(node);
 127                 return brgfreq;
 128         }
 129
 130         /* Legacy device binding -- will go away when no users are left. */
 131         node = of_find_node_by_type(NULL, "cpm");
 132         if (!node)
 133                 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
 134         if (!node)
 135                 node = of_find_node_by_type(NULL, "qe");
 136
 137         if (node) {
 138                 prop = of_get_property(node, "brg-frequency", &size);
 139                 if (prop && size == 4)
 140                         brgfreq = *prop;
 141
 142                 if (brgfreq == -1 || brgfreq == 0) {
 143                         prop = of_get_property(node, "bus-frequency", &size);
 144                         if (prop && size == 4)
 145                                 brgfreq = *prop / 2;
 146                 }
 147                 of_node_put(node);
 148         }
 149
 150         return brgfreq;
 151 }
 152
 153 EXPORT_SYMBOL(get_brgfreq);
 154
 155 static u32 fs_baudrate = -1;
 156
 157 u32 get_baudrate(void)
 158 {
 159         struct device_node *node;
 160
 161         if (fs_baudrate != -1)
 162                 return fs_baudrate;
 163
 164         node = of_find_node_by_type(NULL, "serial");
 165         if (node) {
 166                 int size;
 167                 const unsigned int *prop = of_get_property(node,
 168                                 "current-speed", &size);
 169
 170                 if (prop)
 171                         fs_baudrate = *prop;
 172                 of_node_put(node);
 173         }
 174
 175         return fs_baudrate;
 176 }
 177
 178 EXPORT_SYMBOL(get_baudrate);
 179 #endif /* CONFIG_CPM2 */
 180
 181 #ifdef CONFIG_FIXED_PHY
 182 static int __init of_add_fixed_phys(void)
 183 {
 184         int ret;
 185         struct device_node *np;
 186         u32 *fixed_link;
 187         struct fixed_phy_status status = {};
 188
 189         for_each_node_by_name(np, "ethernet") {
 190                 fixed_link  = (u32 *)of_get_property(np, "fixed-link", NULL);
 191                 if (!fixed_link)
 192                         continue;
 193
 194                 status.link = 1;
 195                 status.duplex = fixed_link[1];
 196                 status.speed = fixed_link[2];
 197                 status.pause = fixed_link[3];
 198                 status.asym_pause = fixed_link[4];
 199
 200                 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
 201                 if (ret) {
 202                         of_node_put(np);
 203                         return ret;
 204                 }
 205         }
 206
 207         return 0;
 208 }
 209 arch_initcall(of_add_fixed_phys);
 210 #endif /* CONFIG_FIXED_PHY */
 211
 212 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
 213 {
 214         if (!phy_type)
 215                 return FSL_USB2_PHY_NONE;
 216         if (!strcasecmp(phy_type, "ulpi"))
 217                 return FSL_USB2_PHY_ULPI;
 218         if (!strcasecmp(phy_type, "utmi"))
 219                 return FSL_USB2_PHY_UTMI;
 220         if (!strcasecmp(phy_type, "utmi_wide"))
 221                 return FSL_USB2_PHY_UTMI_WIDE;
 222         if (!strcasecmp(phy_type, "serial"))
 223                 return FSL_USB2_PHY_SERIAL;
 224
 225         return FSL_USB2_PHY_NONE;
 226 }
 227
 228 static int __init fsl_usb_of_init(void)
 229 {
 230         struct device_node *np;
 231         unsigned int i = 0;
 232         struct platform_device *usb_dev_mph = NULL, *usb_dev_dr_host = NULL,
 233                 *usb_dev_dr_client = NULL;
 234         int ret;
 235
 236         for_each_compatible_node(np, NULL, "fsl-usb2-mph") {
 237                 struct resource r[2];
 238                 struct fsl_usb2_platform_data usb_data;
 239                 const unsigned char *prop = NULL;
 240
 241                 memset(&r, 0, sizeof(r));
 242                 memset(&usb_data, 0, sizeof(usb_data));
 243
 244                 ret = of_address_to_resource(np, 0, &r[0]);
 245                 if (ret)
 246                         goto err;
 247
 248                 of_irq_to_resource(np, 0, &r[1]);
 249
 250                 usb_dev_mph =
 251                     platform_device_register_simple("fsl-ehci", i, r, 2);
 252                 if (IS_ERR(usb_dev_mph)) {
 253                         ret = PTR_ERR(usb_dev_mph);
 254                         goto err;
 255                 }
 256
 257                 usb_dev_mph->dev.coherent_dma_mask = 0xffffffffUL;
 258                 usb_dev_mph->dev.dma_mask = &usb_dev_mph->dev.coherent_dma_mask;
 259
 260                 usb_data.operating_mode = FSL_USB2_MPH_HOST;
 261
 262                 prop = of_get_property(np, "port0", NULL);
 263                 if (prop)
 264                         usb_data.port_enables |= FSL_USB2_PORT0_ENABLED;
 265
 266                 prop = of_get_property(np, "port1", NULL);
 267                 if (prop)
 268                         usb_data.port_enables |= FSL_USB2_PORT1_ENABLED;
 269
 270                 prop = of_get_property(np, "phy_type", NULL);
 271                 usb_data.phy_mode = determine_usb_phy(prop);
 272
 273                 ret =
 274                     platform_device_add_data(usb_dev_mph, &usb_data,
 275                                              sizeof(struct
 276                                                     fsl_usb2_platform_data));
 277                 if (ret)
 278                         goto unreg_mph;
 279                 i++;
 280         }
 281
 282         for_each_compatible_node(np, NULL, "fsl-usb2-dr") {
 283                 struct resource r[2];
 284                 struct fsl_usb2_platform_data usb_data;
 285                 const unsigned char *prop = NULL;
 286
 287                 if (!of_device_is_available(np))
 288                         continue;
 289
 290                 memset(&r, 0, sizeof(r));
 291                 memset(&usb_data, 0, sizeof(usb_data));
 292
 293                 ret = of_address_to_resource(np, 0, &r[0]);
 294                 if (ret)
 295                         goto unreg_mph;
 296
 297                 of_irq_to_resource(np, 0, &r[1]);
 298
 299                 prop = of_get_property(np, "dr_mode", NULL);
 300
 301                 if (!prop || !strcmp(prop, "host")) {
 302                         usb_data.operating_mode = FSL_USB2_DR_HOST;
 303                         usb_dev_dr_host = platform_device_register_simple(
 304                                         "fsl-ehci", i, r, 2);
 305                         if (IS_ERR(usb_dev_dr_host)) {
 306                                 ret = PTR_ERR(usb_dev_dr_host);
 307                                 goto err;
 308                         }
 309                 } else if (prop && !strcmp(prop, "peripheral")) {
 310                         usb_data.operating_mode = FSL_USB2_DR_DEVICE;
 311                         usb_dev_dr_client = platform_device_register_simple(
 312                                         "fsl-usb2-udc", i, r, 2);
 313                         if (IS_ERR(usb_dev_dr_client)) {
 314                                 ret = PTR_ERR(usb_dev_dr_client);
 315                                 goto err;
 316                         }
 317                 } else if (prop && !strcmp(prop, "otg")) {
 318                         usb_data.operating_mode = FSL_USB2_DR_OTG;
 319                         usb_dev_dr_host = platform_device_register_simple(
 320                                         "fsl-ehci", i, r, 2);
 321                         if (IS_ERR(usb_dev_dr_host)) {
 322                                 ret = PTR_ERR(usb_dev_dr_host);
 323                                 goto err;
 324                         }
 325                         usb_dev_dr_client = platform_device_register_simple(
 326                                         "fsl-usb2-udc", i, r, 2);
 327                         if (IS_ERR(usb_dev_dr_client)) {
 328                                 ret = PTR_ERR(usb_dev_dr_client);
 329                                 goto err;
 330                         }
 331                 } else {
 332                         ret = -EINVAL;
 333                         goto err;
 334                 }
 335
 336                 prop = of_get_property(np, "phy_type", NULL);
 337                 usb_data.phy_mode = determine_usb_phy(prop);
 338
 339                 if (usb_dev_dr_host) {
 340                         usb_dev_dr_host->dev.coherent_dma_mask = 0xffffffffUL;
 341                         usb_dev_dr_host->dev.dma_mask = &usb_dev_dr_host->
 342                                 dev.coherent_dma_mask;
 343                         if ((ret = platform_device_add_data(usb_dev_dr_host,
 344                                                 &usb_data, sizeof(struct
 345                                                 fsl_usb2_platform_data))))
 346                                 goto unreg_dr;
 347                 }
 348                 if (usb_dev_dr_client) {
 349                         usb_dev_dr_client->dev.coherent_dma_mask = 0xffffffffUL;
 350                         usb_dev_dr_client->dev.dma_mask = &usb_dev_dr_client->
 351                                 dev.coherent_dma_mask;
 352                         if ((ret = platform_device_add_data(usb_dev_dr_client,
 353                                                 &usb_data, sizeof(struct
 354                                                 fsl_usb2_platform_data))))
 355                                 goto unreg_dr;
 356                 }
 357                 i++;
 358         }
 359         return 0;
 360
 361 unreg_dr:
 362         if (usb_dev_dr_host)
 363                 platform_device_unregister(usb_dev_dr_host);
 364         if (usb_dev_dr_client)
 365                 platform_device_unregister(usb_dev_dr_client);
 366 unreg_mph:
 367         if (usb_dev_mph)
 368                 platform_device_unregister(usb_dev_mph);
 369 err:
 370         return ret;
 371 }
 372
 373 arch_initcall(fsl_usb_of_init);
 374
 375 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
 376 static __be32 __iomem *rstcr;
 377
 378 static int __init setup_rstcr(void)
 379 {
 380         struct device_node *np;
 381         np = of_find_node_by_name(NULL, "global-utilities");
 382         if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
 383                 rstcr = of_iomap(np, 0) + 0xb0;
 384                 if (!rstcr)
 385                         printk (KERN_EMERG "Error: reset control register "
 386                                         "not mapped!\n");
 387         } else if (ppc_md.restart == fsl_rstcr_restart)
 388                 printk(KERN_ERR "No RSTCR register, warm reboot won't work\n");
 389
 390         if (np)
 391                 of_node_put(np);
 392         return 0;
 393 }
 394
 395 arch_initcall(setup_rstcr);
 396
 397 void fsl_rstcr_restart(char *cmd)
 398 {
 399         local_irq_disable();
 400         if (rstcr)
 401                 /* set reset control register */
 402                 out_be32(rstcr, 0x2);   /* HRESET_REQ */
 403
 404         while (1) ;
 405 }
 406 #endif
 407
 408 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
 409 struct platform_diu_data_ops diu_ops;
 410 EXPORT_SYMBOL(diu_ops);
 411 #endif