arch/arm/mach-orion5x/ts78xx-setup.c

   1 /*
   2  * arch/arm/mach-orion5x/ts78xx-setup.c
   3  *
   4  * Maintainer: Alexander Clouter <alex@digriz.org.uk>
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2.  This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/sysfs.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/mv643xx_eth.h>
  16 #include <linux/ata_platform.h>
  17 #include <linux/m48t86.h>
  18 #include <linux/mtd/nand.h>
  19 #include <linux/mtd/partitions.h>
  20 #include <linux/timeriomem-rng.h>
  21 #include <asm/mach-types.h>
  22 #include <asm/mach/arch.h>
  23 #include <asm/mach/map.h>
  24 #include <mach/orion5x.h>
  25 #include "common.h"
  26 #include "mpp.h"
  27 #include "ts78xx-fpga.h"
  28
  29 /*****************************************************************************
  30  * TS-78xx Info
  31  ****************************************************************************/
  32
  33 /*
  34  * FPGA - lives where the PCI bus would be at ORION5X_PCI_MEM_PHYS_BASE
  35  */
  36 #define TS78XX_FPGA_REGS_PHYS_BASE      0xe8000000
  37 #define TS78XX_FPGA_REGS_VIRT_BASE      0xff900000
  38 #define TS78XX_FPGA_REGS_SIZE           SZ_1M
  39
  40 static struct ts78xx_fpga_data ts78xx_fpga = {
  41         .id             = 0,
  42         .state          = 1,
  43 /*      .supports       = ... - populated by ts78xx_fpga_supports() */
  44 };
  45
  46 /*****************************************************************************
  47  * I/O Address Mapping
  48  ****************************************************************************/
  49 static struct map_desc ts78xx_io_desc[] __initdata = {
  50         {
  51                 .virtual        = TS78XX_FPGA_REGS_VIRT_BASE,
  52                 .pfn            = __phys_to_pfn(TS78XX_FPGA_REGS_PHYS_BASE),
  53                 .length         = TS78XX_FPGA_REGS_SIZE,
  54                 .type           = MT_DEVICE,
  55         },
  56 };
  57
  58 void __init ts78xx_map_io(void)
  59 {
  60         orion5x_map_io();
  61         iotable_init(ts78xx_io_desc, ARRAY_SIZE(ts78xx_io_desc));
  62 }
  63
  64 /*****************************************************************************
  65  * Ethernet
  66  ****************************************************************************/
  67 static struct mv643xx_eth_platform_data ts78xx_eth_data = {
  68         .phy_addr       = MV643XX_ETH_PHY_ADDR(0),
  69 };
  70
  71 /*****************************************************************************
  72  * SATA
  73  ****************************************************************************/
  74 static struct mv_sata_platform_data ts78xx_sata_data = {
  75         .n_ports        = 2,
  76 };
  77
  78 /*****************************************************************************
  79  * RTC M48T86 - nicked^Wborrowed from arch/arm/mach-ep93xx/ts72xx.c
  80  ****************************************************************************/
  81 #define TS_RTC_CTRL     (TS78XX_FPGA_REGS_VIRT_BASE | 0x808)
  82 #define TS_RTC_DATA     (TS78XX_FPGA_REGS_VIRT_BASE | 0x80c)
  83
  84 static unsigned char ts78xx_ts_rtc_readbyte(unsigned long addr)
  85 {
  86         writeb(addr, TS_RTC_CTRL);
  87         return readb(TS_RTC_DATA);
  88 }
  89
  90 static void ts78xx_ts_rtc_writebyte(unsigned char value, unsigned long addr)
  91 {
  92         writeb(addr, TS_RTC_CTRL);
  93         writeb(value, TS_RTC_DATA);
  94 }
  95
  96 static struct m48t86_ops ts78xx_ts_rtc_ops = {
  97         .readbyte       = ts78xx_ts_rtc_readbyte,
  98         .writebyte      = ts78xx_ts_rtc_writebyte,
  99 };
 100
 101 static struct platform_device ts78xx_ts_rtc_device = {
 102         .name           = "rtc-m48t86",
 103         .id             = -1,
 104         .dev            = {
 105                 .platform_data  = &ts78xx_ts_rtc_ops,
 106         },
 107         .num_resources  = 0,
 108 };
 109
 110 /*
 111  * TS uses some of the user storage space on the RTC chip so see if it is
 112  * present; as it's an optional feature at purchase time and not all boards
 113  * will have it present
 114  *
 115  * I've used the method TS use in their rtc7800.c example for the detection
 116  *
 117  * TODO: track down a guinea pig without an RTC to see if we can work out a
 118  *              better RTC detection routine
 119  */
 120 static int ts78xx_ts_rtc_load(void)
 121 {
 122         int rc;
 123         unsigned char tmp_rtc0, tmp_rtc1;
 124
 125         tmp_rtc0 = ts78xx_ts_rtc_readbyte(126);
 126         tmp_rtc1 = ts78xx_ts_rtc_readbyte(127);
 127
 128         ts78xx_ts_rtc_writebyte(0x00, 126);
 129         ts78xx_ts_rtc_writebyte(0x55, 127);
 130         if (ts78xx_ts_rtc_readbyte(127) == 0x55) {
 131                 ts78xx_ts_rtc_writebyte(0xaa, 127);
 132                 if (ts78xx_ts_rtc_readbyte(127) == 0xaa
 133                                 && ts78xx_ts_rtc_readbyte(126) == 0x00) {
 134                         ts78xx_ts_rtc_writebyte(tmp_rtc0, 126);
 135                         ts78xx_ts_rtc_writebyte(tmp_rtc1, 127);
 136
 137                         if (ts78xx_fpga.supports.ts_rtc.init == 0) {
 138                                 rc = platform_device_register(&ts78xx_ts_rtc_device);
 139                                 if (!rc)
 140                                         ts78xx_fpga.supports.ts_rtc.init = 1;
 141                         } else
 142                                 rc = platform_device_add(&ts78xx_ts_rtc_device);
 143
 144                         return rc;
 145                 }
 146         }
 147
 148         return -ENODEV;
 149 };
 150
 151 static void ts78xx_ts_rtc_unload(void)
 152 {
 153         platform_device_del(&ts78xx_ts_rtc_device);
 154 }
 155
 156 /*****************************************************************************
 157  * NAND Flash
 158  ****************************************************************************/
 159 #define TS_NAND_CTRL    (TS78XX_FPGA_REGS_VIRT_BASE | 0x800)    /* VIRT */
 160 #define TS_NAND_DATA    (TS78XX_FPGA_REGS_PHYS_BASE | 0x804)    /* PHYS */
 161
 162 /*
 163  * hardware specific access to control-lines
 164  *
 165  * ctrl:
 166  * NAND_NCE: bit 0 -> bit 2
 167  * NAND_CLE: bit 1 -> bit 1
 168  * NAND_ALE: bit 2 -> bit 0
 169  */
 170 static void ts78xx_ts_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
 171                         unsigned int ctrl)
 172 {
 173         struct nand_chip *this = mtd->priv;
 174
 175         if (ctrl & NAND_CTRL_CHANGE) {
 176                 unsigned char bits;
 177
 178                 bits = (ctrl & NAND_NCE) << 2;
 179                 bits |= ctrl & NAND_CLE;
 180                 bits |= (ctrl & NAND_ALE) >> 2;
 181
 182                 writeb((readb(TS_NAND_CTRL) & ~0x7) | bits, TS_NAND_CTRL);
 183         }
 184
 185         if (cmd != NAND_CMD_NONE)
 186                 writeb(cmd, this->IO_ADDR_W);
 187 }
 188
 189 static int ts78xx_ts_nand_dev_ready(struct mtd_info *mtd)
 190 {
 191         return readb(TS_NAND_CTRL) & 0x20;
 192 }
 193
 194 const char *ts_nand_part_probes[] = { "cmdlinepart", NULL };
 195
 196 static struct mtd_partition ts78xx_ts_nand_parts[] = {
 197         {
 198                 .name           = "mbr",
 199                 .offset         = 0,
 200                 .size           = SZ_128K,
 201                 .mask_flags     = MTD_WRITEABLE,
 202         }, {
 203                 .name           = "kernel",
 204                 .offset         = MTDPART_OFS_APPEND,
 205                 .size           = SZ_4M,
 206         }, {
 207                 .name           = "initrd",
 208                 .offset         = MTDPART_OFS_APPEND,
 209                 .size           = SZ_4M,
 210         }, {
 211                 .name           = "rootfs",
 212                 .offset         = MTDPART_OFS_APPEND,
 213                 .size           = MTDPART_SIZ_FULL,
 214         }
 215 };
 216
 217 static struct platform_nand_data ts78xx_ts_nand_data = {
 218         .chip   = {
 219                 .part_probe_types       = ts_nand_part_probes,
 220                 .partitions             = ts78xx_ts_nand_parts,
 221                 .nr_partitions          = ARRAY_SIZE(ts78xx_ts_nand_parts),
 222                 .chip_delay             = 15,
 223                 .options                = NAND_USE_FLASH_BBT,
 224         },
 225         .ctrl   = {
 226                 /*
 227                  * The HW ECC offloading functions, used to give about a 9%
 228                  * performance increase for 'dd if=/dev/mtdblockX' and 5% for
 229                  * nanddump.  This all however was changed by git commit
 230                  * e6cf5df1838c28bb060ac45b5585e48e71bbc740 so now there is
 231                  * no performance advantage to be had so we no longer bother
 232                  */
 233                 .cmd_ctrl               = ts78xx_ts_nand_cmd_ctrl,
 234                 .dev_ready              = ts78xx_ts_nand_dev_ready,
 235         },
 236 };
 237
 238 static struct resource ts78xx_ts_nand_resources = {
 239         .start          = TS_NAND_DATA,
 240         .end            = TS_NAND_DATA + 4,
 241         .flags          = IORESOURCE_IO,
 242 };
 243
 244 static struct platform_device ts78xx_ts_nand_device = {
 245         .name           = "gen_nand",
 246         .id             = -1,
 247         .dev            = {
 248                 .platform_data  = &ts78xx_ts_nand_data,
 249         },
 250         .resource       = &ts78xx_ts_nand_resources,
 251         .num_resources  = 1,
 252 };
 253
 254 static int ts78xx_ts_nand_load(void)
 255 {
 256         int rc;
 257
 258         if (ts78xx_fpga.supports.ts_nand.init == 0) {
 259                 rc = platform_device_register(&ts78xx_ts_nand_device);
 260                 if (!rc)
 261                         ts78xx_fpga.supports.ts_nand.init = 1;
 262         } else
 263                 rc = platform_device_add(&ts78xx_ts_nand_device);
 264
 265         return rc;
 266 };
 267
 268 static void ts78xx_ts_nand_unload(void)
 269 {
 270         platform_device_del(&ts78xx_ts_nand_device);
 271 }
 272
 273 /*****************************************************************************
 274  * HW RNG
 275  ****************************************************************************/
 276 #define TS_RNG_DATA     (TS78XX_FPGA_REGS_PHYS_BASE | 0x044)
 277
 278 static struct resource ts78xx_ts_rng_resource = {
 279         .flags          = IORESOURCE_MEM,
 280         .start          = TS_RNG_DATA,
 281         .end            = TS_RNG_DATA + 4 - 1,
 282 };
 283
 284 static struct timeriomem_rng_data ts78xx_ts_rng_data = {
 285         .period         = 1000000, /* one second */
 286 };
 287
 288 static struct platform_device ts78xx_ts_rng_device = {
 289         .name           = "timeriomem_rng",
 290         .id             = -1,
 291         .dev            = {
 292                 .platform_data  = &ts78xx_ts_rng_data,
 293         },
 294         .resource       = &ts78xx_ts_rng_resource,
 295         .num_resources  = 1,
 296 };
 297
 298 static int ts78xx_ts_rng_load(void)
 299 {
 300         int rc;
 301
 302         if (ts78xx_fpga.supports.ts_rng.init == 0) {
 303                 rc = platform_device_register(&ts78xx_ts_rng_device);
 304                 if (!rc)
 305                         ts78xx_fpga.supports.ts_rng.init = 1;
 306         } else
 307                 rc = platform_device_add(&ts78xx_ts_rng_device);
 308
 309         return rc;
 310 };
 311
 312 static void ts78xx_ts_rng_unload(void)
 313 {
 314         platform_device_del(&ts78xx_ts_rng_device);
 315 }
 316
 317 /*****************************************************************************
 318  * FPGA 'hotplug' support code
 319  ****************************************************************************/
 320 static void ts78xx_fpga_devices_zero_init(void)
 321 {
 322         ts78xx_fpga.supports.ts_rtc.init = 0;
 323         ts78xx_fpga.supports.ts_nand.init = 0;
 324         ts78xx_fpga.supports.ts_rng.init = 0;
 325 }
 326
 327 static void ts78xx_fpga_supports(void)
 328 {
 329         /* TODO: put this 'table' into ts78xx-fpga.h */
 330         switch (ts78xx_fpga.id) {
 331         case TS7800_REV_1:
 332         case TS7800_REV_2:
 333         case TS7800_REV_3:
 334         case TS7800_REV_4:
 335         case TS7800_REV_5:
 336                 ts78xx_fpga.supports.ts_rtc.present = 1;
 337                 ts78xx_fpga.supports.ts_nand.present = 1;
 338                 ts78xx_fpga.supports.ts_rng.present = 1;
 339                 break;
 340         default:
 341                 ts78xx_fpga.supports.ts_rtc.present = 0;
 342                 ts78xx_fpga.supports.ts_nand.present = 0;
 343                 ts78xx_fpga.supports.ts_rng.present = 0;
 344         }
 345 }
 346
 347 static int ts78xx_fpga_load_devices(void)
 348 {
 349         int tmp, ret = 0;
 350
 351         if (ts78xx_fpga.supports.ts_rtc.present == 1) {
 352                 tmp = ts78xx_ts_rtc_load();
 353                 if (tmp) {
 354                         printk(KERN_INFO "TS-78xx: RTC not registered\n");
 355                         ts78xx_fpga.supports.ts_rtc.present = 0;
 356                 }
 357                 ret |= tmp;
 358         }
 359         if (ts78xx_fpga.supports.ts_nand.present == 1) {
 360                 tmp = ts78xx_ts_nand_load();
 361                 if (tmp) {
 362                         printk(KERN_INFO "TS-78xx: NAND not registered\n");
 363                         ts78xx_fpga.supports.ts_nand.present = 0;
 364                 }
 365                 ret |= tmp;
 366         }
 367         if (ts78xx_fpga.supports.ts_rng.present == 1) {
 368                 tmp = ts78xx_ts_rng_load();
 369                 if (tmp) {
 370                         printk(KERN_INFO "TS-78xx: RNG not registered\n");
 371                         ts78xx_fpga.supports.ts_rng.present = 0;
 372                 }
 373                 ret |= tmp;
 374         }
 375
 376         return ret;
 377 }
 378
 379 static int ts78xx_fpga_unload_devices(void)
 380 {
 381         int ret = 0;
 382
 383         if (ts78xx_fpga.supports.ts_rtc.present == 1)
 384                 ts78xx_ts_rtc_unload();
 385         if (ts78xx_fpga.supports.ts_nand.present == 1)
 386                 ts78xx_ts_nand_unload();
 387         if (ts78xx_fpga.supports.ts_rng.present == 1)
 388                 ts78xx_ts_rng_unload();
 389
 390         return ret;
 391 }
 392
 393 static int ts78xx_fpga_load(void)
 394 {
 395         ts78xx_fpga.id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
 396
 397         printk(KERN_INFO "TS-78xx FPGA: magic=0x%.6x, rev=0x%.2x\n",
 398                         (ts78xx_fpga.id >> 8) & 0xffffff,
 399                         ts78xx_fpga.id & 0xff);
 400
 401         ts78xx_fpga_supports();
 402
 403         if (ts78xx_fpga_load_devices()) {
 404                 ts78xx_fpga.state = -1;
 405                 return -EBUSY;
 406         }
 407
 408         return 0;
 409 };
 410
 411 static int ts78xx_fpga_unload(void)
 412 {
 413         unsigned int fpga_id;
 414
 415         fpga_id = readl(TS78XX_FPGA_REGS_VIRT_BASE);
 416
 417         /*
 418          * There does not seem to be a feasible way to block access to the GPIO
 419          * pins from userspace (/dev/mem).  This if clause should hopefully warn
 420          * those foolish enough not to follow 'policy' :)
 421          *
 422          * UrJTAG SVN since r1381 can be used to reprogram the FPGA
 423          */
 424         if (ts78xx_fpga.id != fpga_id) {
 425                 printk(KERN_ERR "TS-78xx FPGA: magic/rev mismatch\n"
 426                         "TS-78xx FPGA: was 0x%.6x/%.2x but now 0x%.6x/%.2x\n",
 427                         (ts78xx_fpga.id >> 8) & 0xffffff, ts78xx_fpga.id & 0xff,
 428                         (fpga_id >> 8) & 0xffffff, fpga_id & 0xff);
 429                 ts78xx_fpga.state = -1;
 430                 return -EBUSY;
 431         }
 432
 433         if (ts78xx_fpga_unload_devices()) {
 434                 ts78xx_fpga.state = -1;
 435                 return -EBUSY;
 436         }
 437
 438         return 0;
 439 };
 440
 441 static ssize_t ts78xx_fpga_show(struct kobject *kobj,
 442                         struct kobj_attribute *attr, char *buf)
 443 {
 444         if (ts78xx_fpga.state < 0)
 445                 return sprintf(buf, "borked\n");
 446
 447         return sprintf(buf, "%s\n", (ts78xx_fpga.state) ? "online" : "offline");
 448 }
 449
 450 static ssize_t ts78xx_fpga_store(struct kobject *kobj,
 451                         struct kobj_attribute *attr, const char *buf, size_t n)
 452 {
 453         int value, ret;
 454
 455         if (ts78xx_fpga.state < 0) {
 456                 printk(KERN_ERR "TS-78xx FPGA: borked, you must powercycle asap\n");
 457                 return -EBUSY;
 458         }
 459
 460         if (strncmp(buf, "online", sizeof("online") - 1) == 0)
 461                 value = 1;
 462         else if (strncmp(buf, "offline", sizeof("offline") - 1) == 0)
 463                 value = 0;
 464         else {
 465                 printk(KERN_ERR "ts78xx_fpga_store: Invalid value\n");
 466                 return -EINVAL;
 467         }
 468
 469         if (ts78xx_fpga.state == value)
 470                 return n;
 471
 472         ret = (ts78xx_fpga.state == 0)
 473                 ? ts78xx_fpga_load()
 474                 : ts78xx_fpga_unload();
 475
 476         if (!(ret < 0))
 477                 ts78xx_fpga.state = value;
 478
 479         return n;
 480 }
 481
 482 static struct kobj_attribute ts78xx_fpga_attr =
 483         __ATTR(ts78xx_fpga, 0644, ts78xx_fpga_show, ts78xx_fpga_store);
 484
 485 /*****************************************************************************
 486  * General Setup
 487  ****************************************************************************/
 488 static struct orion5x_mpp_mode ts78xx_mpp_modes[] __initdata = {
 489         {  0, MPP_UNUSED },
 490         {  1, MPP_GPIO },               /* JTAG Clock */
 491         {  2, MPP_GPIO },               /* JTAG Data In */
 492         {  3, MPP_GPIO },               /* Lat ECP2 256 FPGA - PB2B */
 493         {  4, MPP_GPIO },               /* JTAG Data Out */
 494         {  5, MPP_GPIO },               /* JTAG TMS */
 495         {  6, MPP_GPIO },               /* Lat ECP2 256 FPGA - PB31A_CLK4+ */
 496         {  7, MPP_GPIO },               /* Lat ECP2 256 FPGA - PB22B */
 497         {  8, MPP_UNUSED },
 498         {  9, MPP_UNUSED },
 499         { 10, MPP_UNUSED },
 500         { 11, MPP_UNUSED },
 501         { 12, MPP_UNUSED },
 502         { 13, MPP_UNUSED },
 503         { 14, MPP_UNUSED },
 504         { 15, MPP_UNUSED },
 505         { 16, MPP_UART },
 506         { 17, MPP_UART },
 507         { 18, MPP_UART },
 508         { 19, MPP_UART },
 509         /*
 510          * MPP[20] PCI Clock Out 1
 511          * MPP[21] PCI Clock Out 0
 512          * MPP[22] Unused
 513          * MPP[23] Unused
 514          * MPP[24] Unused
 515          * MPP[25] Unused
 516          */
 517         { -1 },
 518 };
 519
 520 static void __init ts78xx_init(void)
 521 {
 522         int ret;
 523
 524         /*
 525          * Setup basic Orion functions. Need to be called early.
 526          */
 527         orion5x_init();
 528
 529         orion5x_mpp_conf(ts78xx_mpp_modes);
 530
 531         /*
 532          * Configure peripherals.
 533          */
 534         orion5x_ehci0_init();
 535         orion5x_ehci1_init();
 536         orion5x_eth_init(&ts78xx_eth_data);
 537         orion5x_sata_init(&ts78xx_sata_data);
 538         orion5x_uart0_init();
 539         orion5x_uart1_init();
 540         orion5x_xor_init();
 541
 542         /* FPGA init */
 543         ts78xx_fpga_devices_zero_init();
 544         ret = ts78xx_fpga_load();
 545         ret = sysfs_create_file(power_kobj, &ts78xx_fpga_attr.attr);
 546         if (ret)
 547                 printk(KERN_ERR "sysfs_create_file failed: %d\n", ret);
 548 }
 549
 550 MACHINE_START(TS78XX, "Technologic Systems TS-78xx SBC")
 551         /* Maintainer: Alexander Clouter <alex@digriz.org.uk> */
 552         .phys_io        = ORION5X_REGS_PHYS_BASE,
 553         .io_pg_offst    = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC,
 554         .boot_params    = 0x00000100,
 555         .init_machine   = ts78xx_init,
 556         .map_io         = ts78xx_map_io,
 557         .init_irq       = orion5x_init_irq,
 558         .timer          = &orion5x_timer,
 559 MACHINE_END