target/linux/brcm63xx/files/arch/mips/bcm963xx/setup.c

   1 /*
   2 <:copyright-gpl
   3  Copyright 2002 Broadcom Corp. All Rights Reserved.
   4
   5  This program is free software; you can distribute it and/or modify it
   6  under the terms of the GNU General Public License (Version 2) as
   7  published by the Free Software Foundation.
   8
   9  This program is distributed in the hope it will be useful, but WITHOUT
  10  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  for more details.
  13
  14  You should have received a copy of the GNU General Public License along
  15  with this program; if not, write to the Free Software Foundation, Inc.,
  16  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  17 :>
  18 */
  19 /*
  20  * Generic setup routines for Broadcom 963xx MIPS boards
  21  */
  22
  23 #include <linux/autoconf.h>
  24 #include <linux/init.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/kernel.h>
  27 #include <linux/kdev_t.h>
  28 #include <linux/types.h>
  29 #include <linux/console.h>
  30 #include <linux/sched.h>
  31 #include <linux/mm.h>
  32 #include <linux/slab.h>
  33 #include <linux/module.h>
  34 #include <linux/pm.h>
  35 #include <linux/bootmem.h>
  36
  37 #include <asm/addrspace.h>
  38 #include <asm/bcache.h>
  39 #include <asm/irq.h>
  40 #include <asm/time.h>
  41 #include <asm/reboot.h>
  42 #include <asm/gdb-stub.h>
  43 #include <asm/bootinfo.h>
  44 #include <asm/cpu.h>
  45 #include <asm/mach-bcm963xx/bootloaders.h>
  46
  47 extern void brcm_time_init(void);
  48 extern int boot_loader_type;
  49
  50 #include <linux/pci.h>
  51 #include <linux/delay.h>
  52 #include <bcm_map_part.h>
  53 #include <6348_map_part.h>
  54 #include <bcmpci.h>
  55
  56 static volatile MpiRegisters * mpi = (MpiRegisters *)(MPI_BASE);
  57
  58 /* This function should be in a board specific directory.  For now,
  59  * assume that all boards that include this file use a Broadcom chip
  60  * with a soft reset bit in the PLL control register.
  61  */
  62 static void brcm_machine_restart(char *command)
  63 {
  64         const unsigned long ulSoftReset = 0x00000001;
  65         unsigned long *pulPllCtrl = (unsigned long *) 0xfffe0008;
  66         *pulPllCtrl |= ulSoftReset;
  67 }
  68
  69 static void brcm_machine_halt(void)
  70 {
  71         printk("System halted\n");
  72         while (1);
  73 }
  74
  75 static void mpi_SetLocalPciConfigReg(uint32 reg, uint32 value)
  76 {
  77     /* write index then value */
  78     mpi->pcicfgcntrl = PCI_CFG_REG_WRITE_EN + reg;;
  79     mpi->pcicfgdata = value;
  80 }
  81
  82 static uint32 mpi_GetLocalPciConfigReg(uint32 reg)
  83 {
  84     /* write index then get value */
  85     mpi->pcicfgcntrl = PCI_CFG_REG_WRITE_EN + reg;;
  86     return mpi->pcicfgdata;
  87 }
  88
  89 /*
  90  * mpi_ResetPcCard: Set/Reset the PcCard
  91  */
  92 static void mpi_ResetPcCard(int cardtype, BOOL bReset)
  93 {
  94     if (cardtype == MPI_CARDTYPE_NONE) {
  95         return;
  96     }
  97
  98     if (cardtype == MPI_CARDTYPE_CARDBUS) {
  99         bReset = ! bReset;
 100     }
 101
 102     if (bReset) {
 103         mpi->pcmcia_cntl1 = (mpi->pcmcia_cntl1 & ~PCCARD_CARD_RESET);
 104     } else {
 105         mpi->pcmcia_cntl1 = (mpi->pcmcia_cntl1 | PCCARD_CARD_RESET);
 106     }
 107 }
 108
 109 /*
 110  * mpi_ConfigCs: Configure an MPI/EBI chip select
 111  */
 112 static void mpi_ConfigCs(uint32 cs, uint32 base, uint32 size, uint32 flags)
 113 {
 114     mpi->cs[cs].base = ((base & 0x1FFFFFFF) | size);
 115     mpi->cs[cs].config = flags;
 116 }
 117
 118 /*
 119  * mpi_InitPcmciaSpace
 120  */
 121 static void mpi_InitPcmciaSpace(void)
 122 {
 123     // ChipSelect 4 controls PCMCIA Memory accesses
 124     mpi_ConfigCs(PCMCIA_COMMON_BASE, pcmciaMem, EBI_SIZE_1M, (EBI_WORD_WIDE|EBI_ENABLE));
 125     // ChipSelect 5 controls PCMCIA Attribute accesses
 126     mpi_ConfigCs(PCMCIA_ATTRIBUTE_BASE, pcmciaAttr, EBI_SIZE_1M, (EBI_WORD_WIDE|EBI_ENABLE));
 127     // ChipSelect 6 controls PCMCIA I/O accesses
 128     mpi_ConfigCs(PCMCIA_IO_BASE, pcmciaIo, EBI_SIZE_64K, (EBI_WORD_WIDE|EBI_ENABLE));
 129
 130     mpi->pcmcia_cntl2 = ((PCMCIA_ATTR_ACTIVE << RW_ACTIVE_CNT_BIT) |
 131                          (PCMCIA_ATTR_INACTIVE << INACTIVE_CNT_BIT) |
 132                          (PCMCIA_ATTR_CE_SETUP << CE_SETUP_CNT_BIT) |
 133                          (PCMCIA_ATTR_CE_HOLD << CE_HOLD_CNT_BIT));
 134
 135     mpi->pcmcia_cntl2 |= (PCMCIA_HALFWORD_EN | PCMCIA_BYTESWAP_DIS);
 136 }
 137
 138 /*
 139  * cardtype_vcc_detect: PC Card's card detect and voltage sense connection
 140  *
 141  *   CD1#/      CD2#/     VS1#/     VS2#/    Card       Initial Vcc
 142  *  CCD1#      CCD2#     CVS1      CVS2      Type
 143  *
 144  *   GND        GND       open      open     16-bit     5 vdc
 145  *
 146  *   GND        GND       GND       open     16-bit     3.3 vdc
 147  *
 148  *   GND        GND       open      GND      16-bit     x.x vdc
 149  *
 150  *   GND        GND       GND       GND      16-bit     3.3 & x.x vdc
 151  *
 152  *====================================================================
 153  *
 154  *   CVS1       GND       CCD1#     open     CardBus    3.3 vdc
 155  *
 156  *   GND        CVS2      open      CCD2#    CardBus    x.x vdc
 157  *
 158  *   GND        CVS1      CCD2#     open     CardBus    y.y vdc
 159  *
 160  *   GND        CVS2      GND       CCD2#    CardBus    3.3 & x.x vdc
 161  *
 162  *   CVS2       GND       open      CCD1#    CardBus    x.x & y.y vdc
 163  *
 164  *   GND        CVS1      CCD2#     open     CardBus    3.3, x.x & y.y vdc
 165  *
 166  */
 167 static int cardtype_vcc_detect(void)
 168 {
 169     uint32 data32;
 170     int cardtype;
 171
 172     cardtype = MPI_CARDTYPE_NONE;
 173     mpi->pcmcia_cntl1 = 0x0000A000; // Turn on the output enables and drive
 174                                         // the CVS pins to 0.
 175     data32 = mpi->pcmcia_cntl1;
 176     switch (data32 & 0x00000003)  // Test CD1# and CD2#, see if card is plugged in.
 177     {
 178     case 0x00000003:  // No Card is in the slot.
 179         printk("mpi: No Card is in the PCMCIA slot\n");
 180         break;
 181
 182     case 0x00000002:  // Partial insertion, No CD2#.
 183         printk("mpi: Card in the PCMCIA slot partial insertion, no CD2 signal\n");
 184         break;
 185
 186     case 0x00000001:  // Partial insertion, No CD1#.
 187         printk("mpi: Card in the PCMCIA slot partial insertion, no CD1 signal\n");
 188         break;
 189
 190     case 0x00000000:
 191         mpi->pcmcia_cntl1 = 0x0000A0C0; // Turn off the CVS output enables and
 192                                         // float the CVS pins.
 193         mdelay(1);
 194         data32 = mpi->pcmcia_cntl1;
 195         // Read the Register.
 196         switch (data32 & 0x0000000C)  // See what is on the CVS pins.
 197         {
 198         case 0x00000000: // CVS1 and CVS2 are tied to ground, only 1 option.
 199             printk("mpi: Detected 3.3 & x.x 16-bit PCMCIA card\n");
 200             cardtype = MPI_CARDTYPE_PCMCIA;
 201             break;
 202
 203         case 0x00000004: // CVS1 is open or tied to CCD1/CCD2 and CVS2 is tied to ground.
 204                          // 2 valid voltage options.
 205         switch (data32 & 0x00000003)  // Test the values of CCD1 and CCD2.
 206         {
 207             case 0x00000003:  // CCD1 and CCD2 are tied to 1 of the CVS pins.
 208                               // This is not a valid combination.
 209                 printk("mpi: Unknown card plugged into slot\n");
 210                 break;
 211
 212             case 0x00000002:  // CCD2 is tied to either CVS1 or CVS2.
 213                 mpi->pcmcia_cntl1 = 0x0000A080; // Drive CVS1 to a 0.
 214                 mdelay(1);
 215                 data32 = mpi->pcmcia_cntl1;
 216                 if (data32 & 0x00000002) { // CCD2 is tied to CVS2, not valid.
 217                     printk("mpi: Unknown card plugged into slot\n");
 218                 } else {                   // CCD2 is tied to CVS1.
 219                     printk("mpi: Detected 3.3, x.x and y.y Cardbus card\n");
 220                     cardtype = MPI_CARDTYPE_CARDBUS;
 221                 }
 222                 break;
 223
 224             case 0x00000001: // CCD1 is tied to either CVS1 or CVS2.
 225                              // This is not a valid combination.
 226                 printk("mpi: Unknown card plugged into slot\n");
 227                 break;
 228
 229             case 0x00000000:  // CCD1 and CCD2 are tied to ground.
 230                 printk("mpi: Detected x.x vdc 16-bit PCMCIA card\n");
 231                 cardtype = MPI_CARDTYPE_PCMCIA;
 232                 break;
 233             }
 234             break;
 235
 236         case 0x00000008: // CVS2 is open or tied to CCD1/CCD2 and CVS1 is tied to ground.
 237                          // 2 valid voltage options.
 238             switch (data32 & 0x00000003)  // Test the values of CCD1 and CCD2.
 239             {
 240             case 0x00000003:  // CCD1 and CCD2 are tied to 1 of the CVS pins.
 241                               // This is not a valid combination.
 242                 printk("mpi: Unknown card plugged into slot\n");
 243                 break;
 244
 245             case 0x00000002:  // CCD2 is tied to either CVS1 or CVS2.
 246                 mpi->pcmcia_cntl1 = 0x0000A040; // Drive CVS2 to a 0.
 247                 mdelay(1);
 248                 data32 = mpi->pcmcia_cntl1;
 249                 if (data32 & 0x00000002) { // CCD2 is tied to CVS1, not valid.
 250                     printk("mpi: Unknown card plugged into slot\n");
 251                 } else {// CCD2 is tied to CVS2.
 252                     printk("mpi: Detected 3.3 and x.x Cardbus card\n");
 253                     cardtype = MPI_CARDTYPE_CARDBUS;
 254                 }
 255                 break;
 256
 257             case 0x00000001: // CCD1 is tied to either CVS1 or CVS2.
 258                              // This is not a valid combination.
 259                 printk("mpi: Unknown card plugged into slot\n");
 260                 break;
 261
 262             case 0x00000000:  // CCD1 and CCD2 are tied to ground.
 263                 cardtype = MPI_CARDTYPE_PCMCIA;
 264                 printk("mpi: Detected 3.3 vdc 16-bit PCMCIA card\n");
 265                 break;
 266             }
 267             break;
 268
 269         case 0x0000000C:  // CVS1 and CVS2 are open or tied to CCD1/CCD2.
 270                           // 5 valid voltage options.
 271
 272             switch (data32 & 0x00000003)  // Test the values of CCD1 and CCD2.
 273             {
 274             case 0x00000003:  // CCD1 and CCD2 are tied to 1 of the CVS pins.
 275                               // This is not a valid combination.
 276                 printk("mpi: Unknown card plugged into slot\n");
 277                 break;
 278
 279             case 0x00000002:  // CCD2 is tied to either CVS1 or CVS2.
 280                               // CCD1 is tied to ground.
 281                 mpi->pcmcia_cntl1 = 0x0000A040; // Drive CVS2 to a 0.
 282                 mdelay(1);
 283                 data32 = mpi->pcmcia_cntl1;
 284                 if (data32 & 0x00000002) {  // CCD2 is tied to CVS1.
 285                     printk("mpi: Detected y.y vdc Cardbus card\n");
 286                 } else {                    // CCD2 is tied to CVS2.
 287                     printk("mpi: Detected x.x vdc Cardbus card\n");
 288                 }
 289                 cardtype = MPI_CARDTYPE_CARDBUS;
 290                 break;
 291
 292             case 0x00000001: // CCD1 is tied to either CVS1 or CVS2.
 293                              // CCD2 is tied to ground.
 294
 295                 mpi->pcmcia_cntl1 = 0x0000A040; // Drive CVS2 to a 0.
 296                 mdelay(1);
 297                 data32 = mpi->pcmcia_cntl1;
 298                 if (data32 & 0x00000001) {// CCD1 is tied to CVS1.
 299                     printk("mpi: Detected 3.3 vdc Cardbus card\n");
 300                 } else {                    // CCD1 is tied to CVS2.
 301                     printk("mpi: Detected x.x and y.y Cardbus card\n");
 302                 }
 303                 cardtype = MPI_CARDTYPE_CARDBUS;
 304                 break;
 305
 306             case 0x00000000:  // CCD1 and CCD2 are tied to ground.
 307                 cardtype = MPI_CARDTYPE_PCMCIA;
 308                 printk("mpi: Detected 5 vdc 16-bit PCMCIA card\n");
 309                 break;
 310             }
 311             break;
 312
 313         default:
 314             printk("mpi: Unknown card plugged into slot\n");
 315             break;
 316
 317         }
 318     }
 319     return cardtype;
 320 }
 321
 322 /*
 323  * mpi_DetectPcCard: Detect the plugged in PC-Card
 324  * Return: < 0 => Unknown card detected
 325  *         0 => No card detected
 326  *         1 => 16-bit card detected
 327  *         2 => 32-bit CardBus card detected
 328  */
 329 static int mpi_DetectPcCard(void)
 330 {
 331     int cardtype;
 332
 333     cardtype = cardtype_vcc_detect();
 334     switch(cardtype) {
 335         case MPI_CARDTYPE_PCMCIA:
 336             mpi->pcmcia_cntl1 &= ~0x0000e000; // disable enable bits
 337             //mpi->pcmcia_cntl1 = (mpi->pcmcia_cntl1 & ~PCCARD_CARD_RESET);
 338             mpi->pcmcia_cntl1 |= (PCMCIA_ENABLE | PCMCIA_GPIO_ENABLE);
 339             mpi_InitPcmciaSpace();
 340             mpi_ResetPcCard(cardtype, FALSE);
 341             // Hold card in reset for 10ms
 342             mdelay(10);
 343             mpi_ResetPcCard(cardtype, TRUE);
 344             // Let card come out of reset
 345             mdelay(100);
 346             break;
 347         case MPI_CARDTYPE_CARDBUS:
 348             // 8 => CardBus Enable
 349             // 1 => PCI Slot Number
 350             // C => Float VS1 & VS2
 351             mpi->pcmcia_cntl1 = (mpi->pcmcia_cntl1 & 0xFFFF0000) |
 352                                 CARDBUS_ENABLE |
 353                                 (CARDBUS_SLOT << 8)|
 354                                 VS2_OEN |
 355                                 VS1_OEN;
 356             /* access to this memory window will be to/from CardBus */
 357             mpi->l2pmremap1 |= CARDBUS_MEM;
 358
 359             // Need to reset the Cardbus Card. There's no CardManager to do this,
 360             // and we need to be ready for PCI configuration.
 361             mpi_ResetPcCard(cardtype, FALSE);
 362             // Hold card in reset for 10ms
 363             mdelay(10);
 364             mpi_ResetPcCard(cardtype, TRUE);
 365             // Let card come out of reset
 366             mdelay(100);
 367             break;
 368         default:
 369             break;
 370     }
 371     return cardtype;
 372 }
 373
 374 static int mpi_init(void)
 375 {
 376         unsigned long data;
 377         unsigned int chipid, chiprev, sdramsize;
 378
 379         printk("Broadcom BCM963xx MPI\n");
 380         chipid  = (PERF->RevID & 0xFFFF0000) >> 16;
 381         chiprev = (PERF->RevID & 0xFF);
 382
 383         if (boot_loader_type == BOOT_LOADER_CFE)
 384                 sdramsize = boot_mem_map.map[0].size;
 385         else
 386                 sdramsize = 0x01000000;
 387         /*
 388          * Init the pci interface
 389          */
 390         data = GPIO->GPIOMode; // GPIO mode register
 391         data |= GROUP2_PCI | GROUP1_MII_PCCARD; // PCI internal arbiter + Cardbus
 392         GPIO->GPIOMode = data; // PCI internal arbiter
 393
 394     /*
 395      * In the BCM6348 CardBus support is defaulted to Slot 0
 396      * because there is no external IDSEL for CardBus.  To disable
 397      * the CardBus and allow a standard PCI card in Slot 0
 398      * set the cbus_idsel field to 0x1f.
 399     */
 400     /*
 401     uData = mpi->pcmcia_cntl1;
 402     uData |= CARDBUS_IDSEL;
 403     mpi->pcmcia_cntl1 = uData;
 404     */
 405     // Setup PCI I/O Window range. Give 64K to PCI I/O
 406     mpi->l2piorange = ~(BCM_PCI_IO_SIZE_64KB-1);
 407     // UBUS to PCI I/O base address
 408     mpi->l2piobase = BCM_PCI_IO_BASE & BCM_PCI_ADDR_MASK;
 409     // UBUS to PCI I/O Window remap
 410     mpi->l2pioremap = (BCM_PCI_IO_BASE | MEM_WINDOW_EN);
 411
 412     // enable PCI related GPIO pins and data swap between system and PCI bus
 413     mpi->locbuscntrl = (EN_PCI_GPIO | DIR_U2P_NOSWAP);
 414
 415     /* Enable 6348 BusMaster and Memory access mode */
 416     data = mpi_GetLocalPciConfigReg(PCI_COMMAND);
 417     data |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 418     mpi_SetLocalPciConfigReg(PCI_COMMAND, data);
 419
 420     /* Configure two 16 MByte PCI to System memory regions. */
 421     /* These memory regions are used when PCI device is a bus master */
 422     /* Accesses to the SDRAM from PCI bus will be "byte swapped" for this region */
 423     mpi_SetLocalPciConfigReg(PCI_BASE_ADDRESS_3, BCM_HOST_MEM_SPACE1);
 424     mpi->sp0remap = 0x0;
 425
 426     /* Accesses to the SDRAM from PCI bus will not be "byte swapped" for this region */
 427     mpi_SetLocalPciConfigReg(PCI_BASE_ADDRESS_4, BCM_HOST_MEM_SPACE2);
 428     mpi->sp1remap = 0x0;
 429     mpi->pcimodesel |= (PCI_BAR2_NOSWAP | 0x40);
 430
 431     if ((chipid == 0x6348) && (chiprev == 0xb0)) {
 432         mpi->sp0range = ~(sdramsize-1);
 433         mpi->sp1range = ~(sdramsize-1);
 434     }
 435     /*
 436      * Change 6348 PCI Cfg Reg. offset 0x40 to PCI memory read retry count infinity
 437      * by set 0 in bit 8~15.  This resolve read Bcm4306 srom return 0xffff in
 438      * first read.
 439      */
 440     data = mpi_GetLocalPciConfigReg(BRCM_PCI_CONFIG_TIMER);
 441     data &= ~BRCM_PCI_CONFIG_TIMER_RETRY_MASK;
 442     data |= 0x00000080;
 443     mpi_SetLocalPciConfigReg(BRCM_PCI_CONFIG_TIMER, data);
 444
 445     /* enable pci interrupt */
 446     mpi->locintstat |= (EXT_PCI_INT << 16);
 447
 448     mpi_DetectPcCard();
 449
 450     ioport_resource.start = BCM_PCI_IO_BASE;
 451     ioport_resource.end = BCM_PCI_IO_BASE + BCM_PCI_IO_SIZE_64KB;
 452
 453 #if defined(CONFIG_USB)
 454     PERF->blkEnables |= USBH_CLK_EN;
 455     mdelay(100);
 456     *USBH_NON_OHCI = NON_OHCI_BYTE_SWAP;
 457 #endif
 458
 459     return 0;
 460 }
 461
 462 void __init plat_mem_setup(void)
 463 {
 464         _machine_restart = brcm_machine_restart;
 465         _machine_halt = brcm_machine_halt;
 466         pm_power_off = brcm_machine_halt;
 467
 468         //board_time_init = brcm_time_init;
 469
 470         /* mpi initialization */
 471         mpi_init();
 472 }