arch/mips/txx9/generic/setup.c

   1 /*
   2  * linux/arch/mips/txx9/generic/setup.c
   3  *
   4  * Based on linux/arch/mips/txx9/rbtx4938/setup.c,
   5  *          and RBTX49xx patch from CELF patch archive.
   6  *
   7  * 2003-2005 (c) MontaVista Software, Inc.
   8  * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
   9  *
  10  * This file is subject to the terms and conditions of the GNU General Public
  11  * License.  See the file "COPYING" in the main directory of this archive
  12  * for more details.
  13  */
  14 #include <linux/init.h>
  15 #include <linux/kernel.h>
  16 #include <linux/types.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/string.h>
  19 #include <linux/module.h>
  20 #include <linux/clk.h>
  21 #include <linux/err.h>
  22 #include <linux/gpio.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/serial_core.h>
  25 #include <linux/mtd/physmap.h>
  26 #include <linux/leds.h>
  27 #include <asm/bootinfo.h>
  28 #include <asm/time.h>
  29 #include <asm/reboot.h>
  30 #include <asm/r4kcache.h>
  31 #include <asm/txx9/generic.h>
  32 #include <asm/txx9/pci.h>
  33 #include <asm/txx9tmr.h>
  34 #ifdef CONFIG_CPU_TX49XX
  35 #include <asm/txx9/tx4938.h>
  36 #endif
  37
  38 /* EBUSC settings of TX4927, etc. */
  39 struct resource txx9_ce_res[8];
  40 static char txx9_ce_res_name[8][4];     /* "CEn" */
  41
  42 /* pcode, internal register */
  43 unsigned int txx9_pcode;
  44 char txx9_pcode_str[8];
  45 static struct resource txx9_reg_res = {
  46         .name = txx9_pcode_str,
  47         .flags = IORESOURCE_MEM,
  48 };
  49 void __init
  50 txx9_reg_res_init(unsigned int pcode, unsigned long base, unsigned long size)
  51 {
  52         int i;
  53
  54         for (i = 0; i < ARRAY_SIZE(txx9_ce_res); i++) {
  55                 sprintf(txx9_ce_res_name[i], "CE%d", i);
  56                 txx9_ce_res[i].flags = IORESOURCE_MEM;
  57                 txx9_ce_res[i].name = txx9_ce_res_name[i];
  58         }
  59
  60         txx9_pcode = pcode;
  61         sprintf(txx9_pcode_str, "TX%x", pcode);
  62         if (base) {
  63                 txx9_reg_res.start = base & 0xfffffffffULL;
  64                 txx9_reg_res.end = (base & 0xfffffffffULL) + (size - 1);
  65                 request_resource(&iomem_resource, &txx9_reg_res);
  66         }
  67 }
  68
  69 /* clocks */
  70 unsigned int txx9_master_clock;
  71 unsigned int txx9_cpu_clock;
  72 unsigned int txx9_gbus_clock;
  73
  74 #ifdef CONFIG_CPU_TX39XX
  75 /* don't enable by default - see errata */
  76 int txx9_ccfg_toeon __initdata;
  77 #else
  78 int txx9_ccfg_toeon __initdata = 1;
  79 #endif
  80
  81 /* Minimum CLK support */
  82
  83 struct clk *clk_get(struct device *dev, const char *id)
  84 {
  85         if (!strcmp(id, "spi-baseclk"))
  86                 return (struct clk *)((unsigned long)txx9_gbus_clock / 2 / 4);
  87         if (!strcmp(id, "imbus_clk"))
  88                 return (struct clk *)((unsigned long)txx9_gbus_clock / 2);
  89         return ERR_PTR(-ENOENT);
  90 }
  91 EXPORT_SYMBOL(clk_get);
  92
  93 int clk_enable(struct clk *clk)
  94 {
  95         return 0;
  96 }
  97 EXPORT_SYMBOL(clk_enable);
  98
  99 void clk_disable(struct clk *clk)
 100 {
 101 }
 102 EXPORT_SYMBOL(clk_disable);
 103
 104 unsigned long clk_get_rate(struct clk *clk)
 105 {
 106         return (unsigned long)clk;
 107 }
 108 EXPORT_SYMBOL(clk_get_rate);
 109
 110 void clk_put(struct clk *clk)
 111 {
 112 }
 113 EXPORT_SYMBOL(clk_put);
 114
 115 /* GPIO support */
 116
 117 #ifdef CONFIG_GENERIC_GPIO
 118 int gpio_to_irq(unsigned gpio)
 119 {
 120         return -EINVAL;
 121 }
 122 EXPORT_SYMBOL(gpio_to_irq);
 123
 124 int irq_to_gpio(unsigned irq)
 125 {
 126         return -EINVAL;
 127 }
 128 EXPORT_SYMBOL(irq_to_gpio);
 129 #endif
 130
 131 #define BOARD_VEC(board)        extern struct txx9_board_vec board;
 132 #include <asm/txx9/boards.h>
 133 #undef BOARD_VEC
 134
 135 struct txx9_board_vec *txx9_board_vec __initdata;
 136 static char txx9_system_type[32];
 137
 138 static struct txx9_board_vec *board_vecs[] __initdata = {
 139 #define BOARD_VEC(board)        &board,
 140 #include <asm/txx9/boards.h>
 141 #undef BOARD_VEC
 142 };
 143
 144 static struct txx9_board_vec *__init find_board_byname(const char *name)
 145 {
 146         int i;
 147
 148         /* search board_vecs table */
 149         for (i = 0; i < ARRAY_SIZE(board_vecs); i++) {
 150                 if (strstr(board_vecs[i]->system, name))
 151                         return board_vecs[i];
 152         }
 153         return NULL;
 154 }
 155
 156 static void __init prom_init_cmdline(void)
 157 {
 158         int argc = (int)fw_arg0;
 159         int *argv32 = (int *)fw_arg1;
 160         int i;                  /* Always ignore the "-c" at argv[0] */
 161         char builtin[CL_SIZE];
 162
 163         /* ignore all built-in args if any f/w args given */
 164         /*
 165          * But if built-in strings was started with '+', append them
 166          * to command line args.  If built-in was started with '-',
 167          * ignore all f/w args.
 168          */
 169         builtin[0] = '\0';
 170         if (arcs_cmdline[0] == '+')
 171                 strcpy(builtin, arcs_cmdline + 1);
 172         else if (arcs_cmdline[0] == '-') {
 173                 strcpy(builtin, arcs_cmdline + 1);
 174                 argc = 0;
 175         } else if (argc <= 1)
 176                 strcpy(builtin, arcs_cmdline);
 177         arcs_cmdline[0] = '\0';
 178
 179         for (i = 1; i < argc; i++) {
 180                 char *str = (char *)(long)argv32[i];
 181                 if (i != 1)
 182                         strcat(arcs_cmdline, " ");
 183                 if (strchr(str, ' ')) {
 184                         strcat(arcs_cmdline, "\"");
 185                         strcat(arcs_cmdline, str);
 186                         strcat(arcs_cmdline, "\"");
 187                 } else
 188                         strcat(arcs_cmdline, str);
 189         }
 190         /* append saved builtin args */
 191         if (builtin[0]) {
 192                 if (arcs_cmdline[0])
 193                         strcat(arcs_cmdline, " ");
 194                 strcat(arcs_cmdline, builtin);
 195         }
 196 }
 197
 198 static int txx9_ic_disable __initdata;
 199 static int txx9_dc_disable __initdata;
 200
 201 #if defined(CONFIG_CPU_TX49XX)
 202 /* flush all cache on very early stage (before 4k_cache_init) */
 203 static void __init early_flush_dcache(void)
 204 {
 205         unsigned int conf = read_c0_config();
 206         unsigned int dc_size = 1 << (12 + ((conf & CONF_DC) >> 6));
 207         unsigned int linesz = 32;
 208         unsigned long addr, end;
 209
 210         end = INDEX_BASE + dc_size / 4;
 211         /* 4way, waybit=0 */
 212         for (addr = INDEX_BASE; addr < end; addr += linesz) {
 213                 cache_op(Index_Writeback_Inv_D, addr | 0);
 214                 cache_op(Index_Writeback_Inv_D, addr | 1);
 215                 cache_op(Index_Writeback_Inv_D, addr | 2);
 216                 cache_op(Index_Writeback_Inv_D, addr | 3);
 217         }
 218 }
 219
 220 static void __init txx9_cache_fixup(void)
 221 {
 222         unsigned int conf;
 223
 224         conf = read_c0_config();
 225         /* flush and disable */
 226         if (txx9_ic_disable) {
 227                 conf |= TX49_CONF_IC;
 228                 write_c0_config(conf);
 229         }
 230         if (txx9_dc_disable) {
 231                 early_flush_dcache();
 232                 conf |= TX49_CONF_DC;
 233                 write_c0_config(conf);
 234         }
 235
 236         /* enable cache */
 237         conf = read_c0_config();
 238         if (!txx9_ic_disable)
 239                 conf &= ~TX49_CONF_IC;
 240         if (!txx9_dc_disable)
 241                 conf &= ~TX49_CONF_DC;
 242         write_c0_config(conf);
 243
 244         if (conf & TX49_CONF_IC)
 245                 pr_info("TX49XX I-Cache disabled.\n");
 246         if (conf & TX49_CONF_DC)
 247                 pr_info("TX49XX D-Cache disabled.\n");
 248 }
 249 #elif defined(CONFIG_CPU_TX39XX)
 250 /* flush all cache on very early stage (before tx39_cache_init) */
 251 static void __init early_flush_dcache(void)
 252 {
 253         unsigned int conf = read_c0_config();
 254         unsigned int dc_size = 1 << (10 + ((conf & TX39_CONF_DCS_MASK) >>
 255                                            TX39_CONF_DCS_SHIFT));
 256         unsigned int linesz = 16;
 257         unsigned long addr, end;
 258
 259         end = INDEX_BASE + dc_size / 2;
 260         /* 2way, waybit=0 */
 261         for (addr = INDEX_BASE; addr < end; addr += linesz) {
 262                 cache_op(Index_Writeback_Inv_D, addr | 0);
 263                 cache_op(Index_Writeback_Inv_D, addr | 1);
 264         }
 265 }
 266
 267 static void __init txx9_cache_fixup(void)
 268 {
 269         unsigned int conf;
 270
 271         conf = read_c0_config();
 272         /* flush and disable */
 273         if (txx9_ic_disable) {
 274                 conf &= ~TX39_CONF_ICE;
 275                 write_c0_config(conf);
 276         }
 277         if (txx9_dc_disable) {
 278                 early_flush_dcache();
 279                 conf &= ~TX39_CONF_DCE;
 280                 write_c0_config(conf);
 281         }
 282
 283         /* enable cache */
 284         conf = read_c0_config();
 285         if (!txx9_ic_disable)
 286                 conf |= TX39_CONF_ICE;
 287         if (!txx9_dc_disable)
 288                 conf |= TX39_CONF_DCE;
 289         write_c0_config(conf);
 290
 291         if (!(conf & TX39_CONF_ICE))
 292                 pr_info("TX39XX I-Cache disabled.\n");
 293         if (!(conf & TX39_CONF_DCE))
 294                 pr_info("TX39XX D-Cache disabled.\n");
 295 }
 296 #else
 297 static inline void txx9_cache_fixup(void)
 298 {
 299 }
 300 #endif
 301
 302 static void __init preprocess_cmdline(void)
 303 {
 304         char cmdline[CL_SIZE];
 305         char *s;
 306
 307         strcpy(cmdline, arcs_cmdline);
 308         s = cmdline;
 309         arcs_cmdline[0] = '\0';
 310         while (s && *s) {
 311                 char *str = strsep(&s, " ");
 312                 if (strncmp(str, "board=", 6) == 0) {
 313                         txx9_board_vec = find_board_byname(str + 6);
 314                         continue;
 315                 } else if (strncmp(str, "masterclk=", 10) == 0) {
 316                         unsigned long val;
 317                         if (strict_strtoul(str + 10, 10, &val) == 0)
 318                                 txx9_master_clock = val;
 319                         continue;
 320                 } else if (strcmp(str, "icdisable") == 0) {
 321                         txx9_ic_disable = 1;
 322                         continue;
 323                 } else if (strcmp(str, "dcdisable") == 0) {
 324                         txx9_dc_disable = 1;
 325                         continue;
 326                 } else if (strcmp(str, "toeoff") == 0) {
 327                         txx9_ccfg_toeon = 0;
 328                         continue;
 329                 } else if (strcmp(str, "toeon") == 0) {
 330                         txx9_ccfg_toeon = 1;
 331                         continue;
 332                 }
 333                 if (arcs_cmdline[0])
 334                         strcat(arcs_cmdline, " ");
 335                 strcat(arcs_cmdline, str);
 336         }
 337
 338         txx9_cache_fixup();
 339 }
 340
 341 static void __init select_board(void)
 342 {
 343         const char *envstr;
 344
 345         /* first, determine by "board=" argument in preprocess_cmdline() */
 346         if (txx9_board_vec)
 347                 return;
 348         /* next, determine by "board" envvar */
 349         envstr = prom_getenv("board");
 350         if (envstr) {
 351                 txx9_board_vec = find_board_byname(envstr);
 352                 if (txx9_board_vec)
 353                         return;
 354         }
 355
 356         /* select "default" board */
 357 #ifdef CONFIG_CPU_TX39XX
 358         txx9_board_vec = &jmr3927_vec;
 359 #endif
 360 #ifdef CONFIG_CPU_TX49XX
 361         switch (TX4938_REV_PCODE()) {
 362 #ifdef CONFIG_TOSHIBA_RBTX4927
 363         case 0x4927:
 364                 txx9_board_vec = &rbtx4927_vec;
 365                 break;
 366         case 0x4937:
 367                 txx9_board_vec = &rbtx4937_vec;
 368                 break;
 369 #endif
 370 #ifdef CONFIG_TOSHIBA_RBTX4938
 371         case 0x4938:
 372                 txx9_board_vec = &rbtx4938_vec;
 373                 break;
 374 #endif
 375         }
 376 #endif
 377 }
 378
 379 void __init prom_init(void)
 380 {
 381         prom_init_cmdline();
 382         preprocess_cmdline();
 383         select_board();
 384
 385         strcpy(txx9_system_type, txx9_board_vec->system);
 386
 387         txx9_board_vec->prom_init();
 388 }
 389
 390 void __init prom_free_prom_memory(void)
 391 {
 392 }
 393
 394 const char *get_system_type(void)
 395 {
 396         return txx9_system_type;
 397 }
 398
 399 char * __init prom_getcmdline(void)
 400 {
 401         return &(arcs_cmdline[0]);
 402 }
 403
 404 const char *__init prom_getenv(const char *name)
 405 {
 406         const s32 *str = (const s32 *)fw_arg2;
 407
 408         if (!str)
 409                 return NULL;
 410         /* YAMON style ("name", "value" pairs) */
 411         while (str[0] && str[1]) {
 412                 if (!strcmp((const char *)(unsigned long)str[0], name))
 413                         return (const char *)(unsigned long)str[1];
 414                 str += 2;
 415         }
 416         return NULL;
 417 }
 418
 419 static void __noreturn txx9_machine_halt(void)
 420 {
 421         local_irq_disable();
 422         clear_c0_status(ST0_IM);
 423         while (1) {
 424                 if (cpu_wait) {
 425                         (*cpu_wait)();
 426                         if (cpu_has_counter) {
 427                                 /*
 428                                  * Clear counter interrupt while it
 429                                  * breaks WAIT instruction even if
 430                                  * masked.
 431                                  */
 432                                 write_c0_compare(0);
 433                         }
 434                 }
 435         }
 436 }
 437
 438 /* Watchdog support */
 439 void __init txx9_wdt_init(unsigned long base)
 440 {
 441         struct resource res = {
 442                 .start  = base,
 443                 .end    = base + 0x100 - 1,
 444                 .flags  = IORESOURCE_MEM,
 445         };
 446         platform_device_register_simple("txx9wdt", -1, &res, 1);
 447 }
 448
 449 void txx9_wdt_now(unsigned long base)
 450 {
 451         struct txx9_tmr_reg __iomem *tmrptr =
 452                 ioremap(base, sizeof(struct txx9_tmr_reg));
 453         /* disable watch dog timer */
 454         __raw_writel(TXx9_TMWTMR_WDIS | TXx9_TMWTMR_TWC, &tmrptr->wtmr);
 455         __raw_writel(0, &tmrptr->tcr);
 456         /* kick watchdog */
 457         __raw_writel(TXx9_TMWTMR_TWIE, &tmrptr->wtmr);
 458         __raw_writel(1, &tmrptr->cpra); /* immediate */
 459         __raw_writel(TXx9_TMTCR_TCE | TXx9_TMTCR_CCDE | TXx9_TMTCR_TMODE_WDOG,
 460                      &tmrptr->tcr);
 461 }
 462
 463 /* SPI support */
 464 void __init txx9_spi_init(int busid, unsigned long base, int irq)
 465 {
 466         struct resource res[] = {
 467                 {
 468                         .start  = base,
 469                         .end    = base + 0x20 - 1,
 470                         .flags  = IORESOURCE_MEM,
 471                 }, {
 472                         .start  = irq,
 473                         .flags  = IORESOURCE_IRQ,
 474                 },
 475         };
 476         platform_device_register_simple("spi_txx9", busid,
 477                                         res, ARRAY_SIZE(res));
 478 }
 479
 480 void __init txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr)
 481 {
 482         struct platform_device *pdev =
 483                 platform_device_alloc("tc35815-mac", id);
 484         if (!pdev ||
 485             platform_device_add_data(pdev, ethaddr, 6) ||
 486             platform_device_add(pdev))
 487                 platform_device_put(pdev);
 488 }
 489
 490 void __init txx9_sio_init(unsigned long baseaddr, int irq,
 491                           unsigned int line, unsigned int sclk, int nocts)
 492 {
 493 #ifdef CONFIG_SERIAL_TXX9
 494         struct uart_port req;
 495
 496         memset(&req, 0, sizeof(req));
 497         req.line = line;
 498         req.iotype = UPIO_MEM;
 499         req.membase = ioremap(baseaddr, 0x24);
 500         req.mapbase = baseaddr;
 501         req.irq = irq;
 502         if (!nocts)
 503                 req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
 504         if (sclk) {
 505                 req.flags |= UPF_MAGIC_MULTIPLIER /*USE_SCLK*/;
 506                 req.uartclk = sclk;
 507         } else
 508                 req.uartclk = TXX9_IMCLK;
 509         early_serial_txx9_setup(&req);
 510 #endif /* CONFIG_SERIAL_TXX9 */
 511 }
 512
 513 #ifdef CONFIG_EARLY_PRINTK
 514 static void __init null_prom_putchar(char c)
 515 {
 516 }
 517 void (*txx9_prom_putchar)(char c) __initdata = null_prom_putchar;
 518
 519 void __init prom_putchar(char c)
 520 {
 521         txx9_prom_putchar(c);
 522 }
 523
 524 static void __iomem *early_txx9_sio_port;
 525
 526 static void __init early_txx9_sio_putchar(char c)
 527 {
 528 #define TXX9_SICISR     0x0c
 529 #define TXX9_SITFIFO    0x1c
 530 #define TXX9_SICISR_TXALS       0x00000002
 531         while (!(__raw_readl(early_txx9_sio_port + TXX9_SICISR) &
 532                  TXX9_SICISR_TXALS))
 533                 ;
 534         __raw_writel(c, early_txx9_sio_port + TXX9_SITFIFO);
 535 }
 536
 537 void __init txx9_sio_putchar_init(unsigned long baseaddr)
 538 {
 539         early_txx9_sio_port = ioremap(baseaddr, 0x24);
 540         txx9_prom_putchar = early_txx9_sio_putchar;
 541 }
 542 #endif /* CONFIG_EARLY_PRINTK */
 543
 544 /* wrappers */
 545 void __init plat_mem_setup(void)
 546 {
 547         ioport_resource.start = 0;
 548         ioport_resource.end = ~0UL;     /* no limit */
 549         iomem_resource.start = 0;
 550         iomem_resource.end = ~0UL;      /* no limit */
 551
 552         /* fallback restart/halt routines */
 553         _machine_restart = (void (*)(char *))txx9_machine_halt;
 554         _machine_halt = txx9_machine_halt;
 555         pm_power_off = txx9_machine_halt;
 556
 557 #ifdef CONFIG_PCI
 558         pcibios_plat_setup = txx9_pcibios_setup;
 559 #endif
 560         txx9_board_vec->mem_setup();
 561 }
 562
 563 void __init arch_init_irq(void)
 564 {
 565         txx9_board_vec->irq_setup();
 566 }
 567
 568 void __init plat_time_init(void)
 569 {
 570 #ifdef CONFIG_CPU_TX49XX
 571         mips_hpt_frequency = txx9_cpu_clock / 2;
 572 #endif
 573         txx9_board_vec->time_init();
 574 }
 575
 576 static int __init _txx9_arch_init(void)
 577 {
 578         if (txx9_board_vec->arch_init)
 579                 txx9_board_vec->arch_init();
 580         return 0;
 581 }
 582 arch_initcall(_txx9_arch_init);
 583
 584 static int __init _txx9_device_init(void)
 585 {
 586         if (txx9_board_vec->device_init)
 587                 txx9_board_vec->device_init();
 588         return 0;
 589 }
 590 device_initcall(_txx9_device_init);
 591
 592 int (*txx9_irq_dispatch)(int pending);
 593 asmlinkage void plat_irq_dispatch(void)
 594 {
 595         int pending = read_c0_status() & read_c0_cause() & ST0_IM;
 596         int irq = txx9_irq_dispatch(pending);
 597
 598         if (likely(irq >= 0))
 599                 do_IRQ(irq);
 600         else
 601                 spurious_interrupt();
 602 }
 603
 604 /* see include/asm-mips/mach-tx39xx/mangle-port.h, for example. */
 605 #ifdef NEEDS_TXX9_SWIZZLE_ADDR_B
 606 static unsigned long __swizzle_addr_none(unsigned long port)
 607 {
 608         return port;
 609 }
 610 unsigned long (*__swizzle_addr_b)(unsigned long port) = __swizzle_addr_none;
 611 EXPORT_SYMBOL(__swizzle_addr_b);
 612 #endif
 613
 614 void __init txx9_physmap_flash_init(int no, unsigned long addr,
 615                                     unsigned long size,
 616                                     const struct physmap_flash_data *pdata)
 617 {
 618 #if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
 619         struct resource res = {
 620                 .start = addr,
 621                 .end = addr + size - 1,
 622                 .flags = IORESOURCE_MEM,
 623         };
 624         struct platform_device *pdev;
 625 #ifdef CONFIG_MTD_PARTITIONS
 626         static struct mtd_partition parts[2];
 627         struct physmap_flash_data pdata_part;
 628
 629         /* If this area contained boot area, make separate partition */
 630         if (pdata->nr_parts == 0 && !pdata->parts &&
 631             addr < 0x1fc00000 && addr + size > 0x1fc00000 &&
 632             !parts[0].name) {
 633                 parts[0].name = "boot";
 634                 parts[0].offset = 0x1fc00000 - addr;
 635                 parts[0].size = addr + size - 0x1fc00000;
 636                 parts[1].name = "user";
 637                 parts[1].offset = 0;
 638                 parts[1].size = 0x1fc00000 - addr;
 639                 pdata_part = *pdata;
 640                 pdata_part.nr_parts = ARRAY_SIZE(parts);
 641                 pdata_part.parts = parts;
 642                 pdata = &pdata_part;
 643         }
 644 #endif
 645         pdev = platform_device_alloc("physmap-flash", no);
 646         if (!pdev ||
 647             platform_device_add_resources(pdev, &res, 1) ||
 648             platform_device_add_data(pdev, pdata, sizeof(*pdata)) ||
 649             platform_device_add(pdev))
 650                 platform_device_put(pdev);
 651 #endif
 652 }
 653
 654 #if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
 655 static DEFINE_SPINLOCK(txx9_iocled_lock);
 656
 657 #define TXX9_IOCLED_MAXLEDS 8
 658
 659 struct txx9_iocled_data {
 660         struct gpio_chip chip;
 661         u8 cur_val;
 662         void __iomem *mmioaddr;
 663         struct gpio_led_platform_data pdata;
 664         struct gpio_led leds[TXX9_IOCLED_MAXLEDS];
 665         char names[TXX9_IOCLED_MAXLEDS][32];
 666 };
 667
 668 static int txx9_iocled_get(struct gpio_chip *chip, unsigned int offset)
 669 {
 670         struct txx9_iocled_data *data =
 671                 container_of(chip, struct txx9_iocled_data, chip);
 672         return data->cur_val & (1 << offset);
 673 }
 674
 675 static void txx9_iocled_set(struct gpio_chip *chip, unsigned int offset,
 676                             int value)
 677 {
 678         struct txx9_iocled_data *data =
 679                 container_of(chip, struct txx9_iocled_data, chip);
 680         unsigned long flags;
 681         spin_lock_irqsave(&txx9_iocled_lock, flags);
 682         if (value)
 683                 data->cur_val |= 1 << offset;
 684         else
 685                 data->cur_val &= ~(1 << offset);
 686         writeb(data->cur_val, data->mmioaddr);
 687         mmiowb();
 688         spin_unlock_irqrestore(&txx9_iocled_lock, flags);
 689 }
 690
 691 static int txx9_iocled_dir_in(struct gpio_chip *chip, unsigned int offset)
 692 {
 693         return 0;
 694 }
 695
 696 static int txx9_iocled_dir_out(struct gpio_chip *chip, unsigned int offset,
 697                                int value)
 698 {
 699         txx9_iocled_set(chip, offset, value);
 700         return 0;
 701 }
 702
 703 void __init txx9_iocled_init(unsigned long baseaddr,
 704                              int basenum, unsigned int num, int lowactive,
 705                              const char *color, char **deftriggers)
 706 {
 707         struct txx9_iocled_data *iocled;
 708         struct platform_device *pdev;
 709         int i;
 710         static char *default_triggers[] __initdata = {
 711                 "heartbeat",
 712                 "ide-disk",
 713                 "nand-disk",
 714                 NULL,
 715         };
 716
 717         if (!deftriggers)
 718                 deftriggers = default_triggers;
 719         iocled = kzalloc(sizeof(*iocled), GFP_KERNEL);
 720         if (!iocled)
 721                 return;
 722         iocled->mmioaddr = ioremap(baseaddr, 1);
 723         if (!iocled->mmioaddr)
 724                 return;
 725         iocled->chip.get = txx9_iocled_get;
 726         iocled->chip.set = txx9_iocled_set;
 727         iocled->chip.direction_input = txx9_iocled_dir_in;
 728         iocled->chip.direction_output = txx9_iocled_dir_out;
 729         iocled->chip.label = "iocled";
 730         iocled->chip.base = basenum;
 731         iocled->chip.ngpio = num;
 732         if (gpiochip_add(&iocled->chip))
 733                 return;
 734         if (basenum < 0)
 735                 basenum = iocled->chip.base;
 736
 737         pdev = platform_device_alloc("leds-gpio", basenum);
 738         if (!pdev)
 739                 return;
 740         iocled->pdata.num_leds = num;
 741         iocled->pdata.leds = iocled->leds;
 742         for (i = 0; i < num; i++) {
 743                 struct gpio_led *led = &iocled->leds[i];
 744                 snprintf(iocled->names[i], sizeof(iocled->names[i]),
 745                          "iocled:%s:%u", color, i);
 746                 led->name = iocled->names[i];
 747                 led->gpio = basenum + i;
 748                 led->active_low = lowactive;
 749                 if (deftriggers && *deftriggers)
 750                         led->default_trigger = *deftriggers++;
 751         }
 752         pdev->dev.platform_data = &iocled->pdata;
 753         if (platform_device_add(pdev))
 754                 platform_device_put(pdev);
 755 }
 756 #else /* CONFIG_LEDS_GPIO */
 757 void __init txx9_iocled_init(unsigned long baseaddr,
 758                              int basenum, unsigned int num, int lowactive,
 759                              const char *color, char **deftriggers)
 760 {
 761 }
 762 #endif /* CONFIG_LEDS_GPIO */