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