drivers/ssb/pci.c

   1 /*
   2  * Sonics Silicon Backplane PCI-Hostbus related functions.
   3  *
   4  * Copyright (C) 2005-2006 Michael Buesch <m@bues.ch>
   5  * Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
   6  * Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
   7  * Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
   8  * Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
   9  *
  10  * Derived from the Broadcom 4400 device driver.
  11  * Copyright (C) 2002 David S. Miller (davem@redhat.com)
  12  * Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
  13  * Copyright (C) 2006 Broadcom Corporation.
  14  *
  15  * Licensed under the GNU/GPL. See COPYING for details.
  16  */
  17
  18 #include <linux/ssb/ssb.h>
  19 #include <linux/ssb/ssb_regs.h>
  20 #include <linux/slab.h>
  21 #include <linux/pci.h>
  22 #include <linux/delay.h>
  23
  24 #include "ssb_private.h"
  25
  26
  27 /* Define the following to 1 to enable a printk on each coreswitch. */
  28 #define SSB_VERBOSE_PCICORESWITCH_DEBUG         0
  29
  30
  31 /* Lowlevel coreswitching */
  32 int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
  33 {
  34         int err;
  35         int attempts = 0;
  36         u32 cur_core;
  37
  38         while (1) {
  39                 err = pci_write_config_dword(bus->host_pci, SSB_BAR0_WIN,
  40                                              (coreidx * SSB_CORE_SIZE)
  41                                              + SSB_ENUM_BASE);
  42                 if (err)
  43                         goto error;
  44                 err = pci_read_config_dword(bus->host_pci, SSB_BAR0_WIN,
  45                                             &cur_core);
  46                 if (err)
  47                         goto error;
  48                 cur_core = (cur_core - SSB_ENUM_BASE)
  49                            / SSB_CORE_SIZE;
  50                 if (cur_core == coreidx)
  51                         break;
  52
  53                 if (attempts++ > SSB_BAR0_MAX_RETRIES)
  54                         goto error;
  55                 udelay(10);
  56         }
  57         return 0;
  58 error:
  59         ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
  60         return -ENODEV;
  61 }
  62
  63 int ssb_pci_switch_core(struct ssb_bus *bus,
  64                         struct ssb_device *dev)
  65 {
  66         int err;
  67         unsigned long flags;
  68
  69 #if SSB_VERBOSE_PCICORESWITCH_DEBUG
  70         ssb_printk(KERN_INFO PFX
  71                    "Switching to %s core, index %d\n",
  72                    ssb_core_name(dev->id.coreid),
  73                    dev->core_index);
  74 #endif
  75
  76         spin_lock_irqsave(&bus->bar_lock, flags);
  77         err = ssb_pci_switch_coreidx(bus, dev->core_index);
  78         if (!err)
  79                 bus->mapped_device = dev;
  80         spin_unlock_irqrestore(&bus->bar_lock, flags);
  81
  82         return err;
  83 }
  84
  85 /* Enable/disable the on board crystal oscillator and/or PLL. */
  86 int ssb_pci_xtal(struct ssb_bus *bus, u32 what, int turn_on)
  87 {
  88         int err;
  89         u32 in, out, outenable;
  90         u16 pci_status;
  91
  92         if (bus->bustype != SSB_BUSTYPE_PCI)
  93                 return 0;
  94
  95         err = pci_read_config_dword(bus->host_pci, SSB_GPIO_IN, &in);
  96         if (err)
  97                 goto err_pci;
  98         err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT, &out);
  99         if (err)
 100                 goto err_pci;
 101         err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, &outenable);
 102         if (err)
 103                 goto err_pci;
 104
 105         outenable |= what;
 106
 107         if (turn_on) {
 108                 /* Avoid glitching the clock if GPRS is already using it.
 109                  * We can't actually read the state of the PLLPD so we infer it
 110                  * by the value of XTAL_PU which *is* readable via gpioin.
 111                  */
 112                 if (!(in & SSB_GPIO_XTAL)) {
 113                         if (what & SSB_GPIO_XTAL) {
 114                                 /* Turn the crystal on */
 115                                 out |= SSB_GPIO_XTAL;
 116                                 if (what & SSB_GPIO_PLL)
 117                                         out |= SSB_GPIO_PLL;
 118                                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
 119                                 if (err)
 120                                         goto err_pci;
 121                                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE,
 122                                                              outenable);
 123                                 if (err)
 124                                         goto err_pci;
 125                                 msleep(1);
 126                         }
 127                         if (what & SSB_GPIO_PLL) {
 128                                 /* Turn the PLL on */
 129                                 out &= ~SSB_GPIO_PLL;
 130                                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
 131                                 if (err)
 132                                         goto err_pci;
 133                                 msleep(5);
 134                         }
 135                 }
 136
 137                 err = pci_read_config_word(bus->host_pci, PCI_STATUS, &pci_status);
 138                 if (err)
 139                         goto err_pci;
 140                 pci_status &= ~PCI_STATUS_SIG_TARGET_ABORT;
 141                 err = pci_write_config_word(bus->host_pci, PCI_STATUS, pci_status);
 142                 if (err)
 143                         goto err_pci;
 144         } else {
 145                 if (what & SSB_GPIO_XTAL) {
 146                         /* Turn the crystal off */
 147                         out &= ~SSB_GPIO_XTAL;
 148                 }
 149                 if (what & SSB_GPIO_PLL) {
 150                         /* Turn the PLL off */
 151                         out |= SSB_GPIO_PLL;
 152                 }
 153                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
 154                 if (err)
 155                         goto err_pci;
 156                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, outenable);
 157                 if (err)
 158                         goto err_pci;
 159         }
 160
 161 out:
 162         return err;
 163
 164 err_pci:
 165         printk(KERN_ERR PFX "Error: ssb_pci_xtal() could not access PCI config space!\n");
 166         err = -EBUSY;
 167         goto out;
 168 }
 169
 170 /* Get the word-offset for a SSB_SPROM_XXX define. */
 171 #define SPOFF(offset)   ((offset) / sizeof(u16))
 172 /* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
 173 #define SPEX16(_outvar, _offset, _mask, _shift) \
 174         out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
 175 #define SPEX32(_outvar, _offset, _mask, _shift) \
 176         out->_outvar = ((((u32)in[SPOFF((_offset)+2)] << 16 | \
 177                            in[SPOFF(_offset)]) & (_mask)) >> (_shift))
 178 #define SPEX(_outvar, _offset, _mask, _shift) \
 179         SPEX16(_outvar, _offset, _mask, _shift)
 180
 181
 182 static inline u8 ssb_crc8(u8 crc, u8 data)
 183 {
 184         /* Polynomial:   x^8 + x^7 + x^6 + x^4 + x^2 + 1   */
 185         static const u8 t[] = {
 186                 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
 187                 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
 188                 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
 189                 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
 190                 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
 191                 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
 192                 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
 193                 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
 194                 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
 195                 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
 196                 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
 197                 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
 198                 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
 199                 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
 200                 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
 201                 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
 202                 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
 203                 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
 204                 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
 205                 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
 206                 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
 207                 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
 208                 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
 209                 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
 210                 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
 211                 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
 212                 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
 213                 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
 214                 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
 215                 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
 216                 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
 217                 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
 218         };
 219         return t[crc ^ data];
 220 }
 221
 222 static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
 223 {
 224         int word;
 225         u8 crc = 0xFF;
 226
 227         for (word = 0; word < size - 1; word++) {
 228                 crc = ssb_crc8(crc, sprom[word] & 0x00FF);
 229                 crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
 230         }
 231         crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
 232         crc ^= 0xFF;
 233
 234         return crc;
 235 }
 236
 237 static int sprom_check_crc(const u16 *sprom, size_t size)
 238 {
 239         u8 crc;
 240         u8 expected_crc;
 241         u16 tmp;
 242
 243         crc = ssb_sprom_crc(sprom, size);
 244         tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
 245         expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
 246         if (crc != expected_crc)
 247                 return -EPROTO;
 248
 249         return 0;
 250 }
 251
 252 static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
 253 {
 254         int i;
 255
 256         for (i = 0; i < bus->sprom_size; i++)
 257                 sprom[i] = ioread16(bus->mmio + bus->sprom_offset + (i * 2));
 258
 259         return 0;
 260 }
 261
 262 static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
 263 {
 264         struct pci_dev *pdev = bus->host_pci;
 265         int i, err;
 266         u32 spromctl;
 267         u16 size = bus->sprom_size;
 268
 269         ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
 270         err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
 271         if (err)
 272                 goto err_ctlreg;
 273         spromctl |= SSB_SPROMCTL_WE;
 274         err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
 275         if (err)
 276                 goto err_ctlreg;
 277         ssb_printk(KERN_NOTICE PFX "[ 0%%");
 278         msleep(500);
 279         for (i = 0; i < size; i++) {
 280                 if (i == size / 4)
 281                         ssb_printk("25%%");
 282                 else if (i == size / 2)
 283                         ssb_printk("50%%");
 284                 else if (i == (size * 3) / 4)
 285                         ssb_printk("75%%");
 286                 else if (i % 2)
 287                         ssb_printk(".");
 288                 writew(sprom[i], bus->mmio + bus->sprom_offset + (i * 2));
 289                 mmiowb();
 290                 msleep(20);
 291         }
 292         err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
 293         if (err)
 294                 goto err_ctlreg;
 295         spromctl &= ~SSB_SPROMCTL_WE;
 296         err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
 297         if (err)
 298                 goto err_ctlreg;
 299         msleep(500);
 300         ssb_printk("100%% ]\n");
 301         ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
 302
 303         return 0;
 304 err_ctlreg:
 305         ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
 306         return err;
 307 }
 308
 309 static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
 310                                u16 mask, u16 shift)
 311 {
 312         u16 v;
 313         u8 gain;
 314
 315         v = in[SPOFF(SSB_SPROM1_AGAIN)];
 316         gain = (v & mask) >> shift;
 317         if (gain == 0xFF)
 318                 gain = 2; /* If unset use 2dBm */
 319         if (sprom_revision == 1) {
 320                 /* Convert to Q5.2 */
 321                 gain <<= 2;
 322         } else {
 323                 /* Q5.2 Fractional part is stored in 0xC0 */
 324                 gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
 325         }
 326
 327         return (s8)gain;
 328 }
 329
 330 static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
 331 {
 332         int i;
 333         u16 v;
 334         s8 gain;
 335         u16 loc[3];
 336
 337         if (out->revision == 3)                 /* rev 3 moved MAC */
 338                 loc[0] = SSB_SPROM3_IL0MAC;
 339         else {
 340                 loc[0] = SSB_SPROM1_IL0MAC;
 341                 loc[1] = SSB_SPROM1_ET0MAC;
 342                 loc[2] = SSB_SPROM1_ET1MAC;
 343         }
 344         for (i = 0; i < 3; i++) {
 345                 v = in[SPOFF(loc[0]) + i];
 346                 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
 347         }
 348         if (out->revision < 3) {        /* only rev 1-2 have et0, et1 */
 349                 for (i = 0; i < 3; i++) {
 350                         v = in[SPOFF(loc[1]) + i];
 351                         *(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
 352                 }
 353                 for (i = 0; i < 3; i++) {
 354                         v = in[SPOFF(loc[2]) + i];
 355                         *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
 356                 }
 357         }
 358         SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
 359         SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
 360              SSB_SPROM1_ETHPHY_ET1A_SHIFT);
 361         SPEX(et0mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0M, 14);
 362         SPEX(et1mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1M, 15);
 363         SPEX(board_rev, SSB_SPROM1_BINF, SSB_SPROM1_BINF_BREV, 0);
 364         SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
 365              SSB_SPROM1_BINF_CCODE_SHIFT);
 366         SPEX(ant_available_a, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTA,
 367              SSB_SPROM1_BINF_ANTA_SHIFT);
 368         SPEX(ant_available_bg, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTBG,
 369              SSB_SPROM1_BINF_ANTBG_SHIFT);
 370         SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
 371         SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
 372         SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
 373         SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
 374         SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
 375         SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
 376         SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
 377         SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
 378              SSB_SPROM1_GPIOA_P1_SHIFT);
 379         SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
 380         SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
 381              SSB_SPROM1_GPIOB_P3_SHIFT);
 382         SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
 383              SSB_SPROM1_MAXPWR_A_SHIFT);
 384         SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
 385         SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
 386              SSB_SPROM1_ITSSI_A_SHIFT);
 387         SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
 388         SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
 389         if (out->revision >= 2)
 390                 SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
 391
 392         /* Extract the antenna gain values. */
 393         gain = r123_extract_antgain(out->revision, in,
 394                                     SSB_SPROM1_AGAIN_BG,
 395                                     SSB_SPROM1_AGAIN_BG_SHIFT);
 396         out->antenna_gain.ghz24.a0 = gain;
 397         out->antenna_gain.ghz24.a1 = gain;
 398         out->antenna_gain.ghz24.a2 = gain;
 399         out->antenna_gain.ghz24.a3 = gain;
 400         gain = r123_extract_antgain(out->revision, in,
 401                                     SSB_SPROM1_AGAIN_A,
 402                                     SSB_SPROM1_AGAIN_A_SHIFT);
 403         out->antenna_gain.ghz5.a0 = gain;
 404         out->antenna_gain.ghz5.a1 = gain;
 405         out->antenna_gain.ghz5.a2 = gain;
 406         out->antenna_gain.ghz5.a3 = gain;
 407 }
 408
 409 /* Revs 4 5 and 8 have partially shared layout */
 410 static void sprom_extract_r458(struct ssb_sprom *out, const u16 *in)
 411 {
 412         SPEX(txpid2g[0], SSB_SPROM4_TXPID2G01,
 413              SSB_SPROM4_TXPID2G0, SSB_SPROM4_TXPID2G0_SHIFT);
 414         SPEX(txpid2g[1], SSB_SPROM4_TXPID2G01,
 415              SSB_SPROM4_TXPID2G1, SSB_SPROM4_TXPID2G1_SHIFT);
 416         SPEX(txpid2g[2], SSB_SPROM4_TXPID2G23,
 417              SSB_SPROM4_TXPID2G2, SSB_SPROM4_TXPID2G2_SHIFT);
 418         SPEX(txpid2g[3], SSB_SPROM4_TXPID2G23,
 419              SSB_SPROM4_TXPID2G3, SSB_SPROM4_TXPID2G3_SHIFT);
 420
 421         SPEX(txpid5gl[0], SSB_SPROM4_TXPID5GL01,
 422              SSB_SPROM4_TXPID5GL0, SSB_SPROM4_TXPID5GL0_SHIFT);
 423         SPEX(txpid5gl[1], SSB_SPROM4_TXPID5GL01,
 424              SSB_SPROM4_TXPID5GL1, SSB_SPROM4_TXPID5GL1_SHIFT);
 425         SPEX(txpid5gl[2], SSB_SPROM4_TXPID5GL23,
 426              SSB_SPROM4_TXPID5GL2, SSB_SPROM4_TXPID5GL2_SHIFT);
 427         SPEX(txpid5gl[3], SSB_SPROM4_TXPID5GL23,
 428              SSB_SPROM4_TXPID5GL3, SSB_SPROM4_TXPID5GL3_SHIFT);
 429
 430         SPEX(txpid5g[0], SSB_SPROM4_TXPID5G01,
 431              SSB_SPROM4_TXPID5G0, SSB_SPROM4_TXPID5G0_SHIFT);
 432         SPEX(txpid5g[1], SSB_SPROM4_TXPID5G01,
 433              SSB_SPROM4_TXPID5G1, SSB_SPROM4_TXPID5G1_SHIFT);
 434         SPEX(txpid5g[2], SSB_SPROM4_TXPID5G23,
 435              SSB_SPROM4_TXPID5G2, SSB_SPROM4_TXPID5G2_SHIFT);
 436         SPEX(txpid5g[3], SSB_SPROM4_TXPID5G23,
 437              SSB_SPROM4_TXPID5G3, SSB_SPROM4_TXPID5G3_SHIFT);
 438
 439         SPEX(txpid5gh[0], SSB_SPROM4_TXPID5GH01,
 440              SSB_SPROM4_TXPID5GH0, SSB_SPROM4_TXPID5GH0_SHIFT);
 441         SPEX(txpid5gh[1], SSB_SPROM4_TXPID5GH01,
 442              SSB_SPROM4_TXPID5GH1, SSB_SPROM4_TXPID5GH1_SHIFT);
 443         SPEX(txpid5gh[2], SSB_SPROM4_TXPID5GH23,
 444              SSB_SPROM4_TXPID5GH2, SSB_SPROM4_TXPID5GH2_SHIFT);
 445         SPEX(txpid5gh[3], SSB_SPROM4_TXPID5GH23,
 446              SSB_SPROM4_TXPID5GH3, SSB_SPROM4_TXPID5GH3_SHIFT);
 447 }
 448
 449 static void sprom_extract_r45(struct ssb_sprom *out, const u16 *in)
 450 {
 451         int i;
 452         u16 v;
 453         u16 il0mac_offset;
 454
 455         if (out->revision == 4)
 456                 il0mac_offset = SSB_SPROM4_IL0MAC;
 457         else
 458                 il0mac_offset = SSB_SPROM5_IL0MAC;
 459         /* extract the MAC address */
 460         for (i = 0; i < 3; i++) {
 461                 v = in[SPOFF(il0mac_offset) + i];
 462                 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
 463         }
 464         SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
 465         SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
 466              SSB_SPROM4_ETHPHY_ET1A_SHIFT);
 467         if (out->revision == 4) {
 468                 SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
 469                 SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
 470                 SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
 471                 SPEX(boardflags2_lo, SSB_SPROM4_BFL2LO, 0xFFFF, 0);
 472                 SPEX(boardflags2_hi, SSB_SPROM4_BFL2HI, 0xFFFF, 0);
 473         } else {
 474                 SPEX(country_code, SSB_SPROM5_CCODE, 0xFFFF, 0);
 475                 SPEX(boardflags_lo, SSB_SPROM5_BFLLO, 0xFFFF, 0);
 476                 SPEX(boardflags_hi, SSB_SPROM5_BFLHI, 0xFFFF, 0);
 477                 SPEX(boardflags2_lo, SSB_SPROM5_BFL2LO, 0xFFFF, 0);
 478                 SPEX(boardflags2_hi, SSB_SPROM5_BFL2HI, 0xFFFF, 0);
 479         }
 480         SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
 481              SSB_SPROM4_ANTAVAIL_A_SHIFT);
 482         SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
 483              SSB_SPROM4_ANTAVAIL_BG_SHIFT);
 484         SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
 485         SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
 486              SSB_SPROM4_ITSSI_BG_SHIFT);
 487         SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
 488         SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
 489              SSB_SPROM4_ITSSI_A_SHIFT);
 490         if (out->revision == 4) {
 491                 SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
 492                 SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
 493                      SSB_SPROM4_GPIOA_P1_SHIFT);
 494                 SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
 495                 SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
 496                      SSB_SPROM4_GPIOB_P3_SHIFT);
 497         } else {
 498                 SPEX(gpio0, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P0, 0);
 499                 SPEX(gpio1, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P1,
 500                      SSB_SPROM5_GPIOA_P1_SHIFT);
 501                 SPEX(gpio2, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P2, 0);
 502                 SPEX(gpio3, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P3,
 503                      SSB_SPROM5_GPIOB_P3_SHIFT);
 504         }
 505
 506         /* Extract the antenna gain values. */
 507         SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
 508              SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
 509         SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
 510              SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
 511         SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
 512              SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
 513         SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
 514              SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
 515         memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
 516                sizeof(out->antenna_gain.ghz5));
 517
 518         sprom_extract_r458(out, in);
 519
 520         /* TODO - get remaining rev 4 stuff needed */
 521 }
 522
 523 static void sprom_extract_r8(struct ssb_sprom *out, const u16 *in)
 524 {
 525         int i;
 526         u16 v;
 527
 528         /* extract the MAC address */
 529         for (i = 0; i < 3; i++) {
 530                 v = in[SPOFF(SSB_SPROM8_IL0MAC) + i];
 531                 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
 532         }
 533         SPEX(country_code, SSB_SPROM8_CCODE, 0xFFFF, 0);
 534         SPEX(boardflags_lo, SSB_SPROM8_BFLLO, 0xFFFF, 0);
 535         SPEX(boardflags_hi, SSB_SPROM8_BFLHI, 0xFFFF, 0);
 536         SPEX(boardflags2_lo, SSB_SPROM8_BFL2LO, 0xFFFF, 0);
 537         SPEX(boardflags2_hi, SSB_SPROM8_BFL2HI, 0xFFFF, 0);
 538         SPEX(ant_available_a, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_A,
 539              SSB_SPROM8_ANTAVAIL_A_SHIFT);
 540         SPEX(ant_available_bg, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_BG,
 541              SSB_SPROM8_ANTAVAIL_BG_SHIFT);
 542         SPEX(maxpwr_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_MAXP_BG_MASK, 0);
 543         SPEX(itssi_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_ITSSI_BG,
 544              SSB_SPROM8_ITSSI_BG_SHIFT);
 545         SPEX(maxpwr_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_MAXP_A_MASK, 0);
 546         SPEX(itssi_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_ITSSI_A,
 547              SSB_SPROM8_ITSSI_A_SHIFT);
 548         SPEX(maxpwr_ah, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AH_MASK, 0);
 549         SPEX(maxpwr_al, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AL_MASK,
 550              SSB_SPROM8_MAXP_AL_SHIFT);
 551         SPEX(gpio0, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P0, 0);
 552         SPEX(gpio1, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P1,
 553              SSB_SPROM8_GPIOA_P1_SHIFT);
 554         SPEX(gpio2, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P2, 0);
 555         SPEX(gpio3, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P3,
 556              SSB_SPROM8_GPIOB_P3_SHIFT);
 557         SPEX(tri2g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI2G, 0);
 558         SPEX(tri5g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI5G,
 559              SSB_SPROM8_TRI5G_SHIFT);
 560         SPEX(tri5gl, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GL, 0);
 561         SPEX(tri5gh, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GH,
 562              SSB_SPROM8_TRI5GH_SHIFT);
 563         SPEX(rxpo2g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO2G, 0);
 564         SPEX(rxpo5g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO5G,
 565              SSB_SPROM8_RXPO5G_SHIFT);
 566         SPEX(rssismf2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMF2G, 0);
 567         SPEX(rssismc2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMC2G,
 568              SSB_SPROM8_RSSISMC2G_SHIFT);
 569         SPEX(rssisav2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISAV2G,
 570              SSB_SPROM8_RSSISAV2G_SHIFT);
 571         SPEX(bxa2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_BXA2G,
 572              SSB_SPROM8_BXA2G_SHIFT);
 573         SPEX(rssismf5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMF5G, 0);
 574         SPEX(rssismc5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMC5G,
 575              SSB_SPROM8_RSSISMC5G_SHIFT);
 576         SPEX(rssisav5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISAV5G,
 577              SSB_SPROM8_RSSISAV5G_SHIFT);
 578         SPEX(bxa5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_BXA5G,
 579              SSB_SPROM8_BXA5G_SHIFT);
 580         SPEX(pa0b0, SSB_SPROM8_PA0B0, 0xFFFF, 0);
 581         SPEX(pa0b1, SSB_SPROM8_PA0B1, 0xFFFF, 0);
 582         SPEX(pa0b2, SSB_SPROM8_PA0B2, 0xFFFF, 0);
 583         SPEX(pa1b0, SSB_SPROM8_PA1B0, 0xFFFF, 0);
 584         SPEX(pa1b1, SSB_SPROM8_PA1B1, 0xFFFF, 0);
 585         SPEX(pa1b2, SSB_SPROM8_PA1B2, 0xFFFF, 0);
 586         SPEX(pa1lob0, SSB_SPROM8_PA1LOB0, 0xFFFF, 0);
 587         SPEX(pa1lob1, SSB_SPROM8_PA1LOB1, 0xFFFF, 0);
 588         SPEX(pa1lob2, SSB_SPROM8_PA1LOB2, 0xFFFF, 0);
 589         SPEX(pa1hib0, SSB_SPROM8_PA1HIB0, 0xFFFF, 0);
 590         SPEX(pa1hib1, SSB_SPROM8_PA1HIB1, 0xFFFF, 0);
 591         SPEX(pa1hib2, SSB_SPROM8_PA1HIB2, 0xFFFF, 0);
 592         SPEX(cck2gpo, SSB_SPROM8_CCK2GPO, 0xFFFF, 0);
 593         SPEX32(ofdm2gpo, SSB_SPROM8_OFDM2GPO, 0xFFFFFFFF, 0);
 594         SPEX32(ofdm5glpo, SSB_SPROM8_OFDM5GLPO, 0xFFFFFFFF, 0);
 595         SPEX32(ofdm5gpo, SSB_SPROM8_OFDM5GPO, 0xFFFFFFFF, 0);
 596         SPEX32(ofdm5ghpo, SSB_SPROM8_OFDM5GHPO, 0xFFFFFFFF, 0);
 597
 598         /* Extract the antenna gain values. */
 599         SPEX(antenna_gain.ghz24.a0, SSB_SPROM8_AGAIN01,
 600              SSB_SPROM8_AGAIN0, SSB_SPROM8_AGAIN0_SHIFT);
 601         SPEX(antenna_gain.ghz24.a1, SSB_SPROM8_AGAIN01,
 602              SSB_SPROM8_AGAIN1, SSB_SPROM8_AGAIN1_SHIFT);
 603         SPEX(antenna_gain.ghz24.a2, SSB_SPROM8_AGAIN23,
 604              SSB_SPROM8_AGAIN2, SSB_SPROM8_AGAIN2_SHIFT);
 605         SPEX(antenna_gain.ghz24.a3, SSB_SPROM8_AGAIN23,
 606              SSB_SPROM8_AGAIN3, SSB_SPROM8_AGAIN3_SHIFT);
 607         memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
 608                sizeof(out->antenna_gain.ghz5));
 609
 610         sprom_extract_r458(out, in);
 611
 612         /* TODO - get remaining rev 8 stuff needed */
 613 }
 614
 615 static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
 616                          const u16 *in, u16 size)
 617 {
 618         memset(out, 0, sizeof(*out));
 619
 620         out->revision = in[size - 1] & 0x00FF;
 621         ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
 622         memset(out->et0mac, 0xFF, 6);           /* preset et0 and et1 mac */
 623         memset(out->et1mac, 0xFF, 6);
 624
 625         if ((bus->chip_id & 0xFF00) == 0x4400) {
 626                 /* Workaround: The BCM44XX chip has a stupid revision
 627                  * number stored in the SPROM.
 628                  * Always extract r1. */
 629                 out->revision = 1;
 630                 ssb_dprintk(KERN_DEBUG PFX "SPROM treated as revision %d\n", out->revision);
 631         }
 632
 633         switch (out->revision) {
 634         case 1:
 635         case 2:
 636         case 3:
 637                 sprom_extract_r123(out, in);
 638                 break;
 639         case 4:
 640         case 5:
 641                 sprom_extract_r45(out, in);
 642                 break;
 643         case 8:
 644                 sprom_extract_r8(out, in);
 645                 break;
 646         default:
 647                 ssb_printk(KERN_WARNING PFX "Unsupported SPROM"
 648                            " revision %d detected. Will extract"
 649                            " v1\n", out->revision);
 650                 out->revision = 1;
 651                 sprom_extract_r123(out, in);
 652         }
 653
 654         if (out->boardflags_lo == 0xFFFF)
 655                 out->boardflags_lo = 0;  /* per specs */
 656         if (out->boardflags_hi == 0xFFFF)
 657                 out->boardflags_hi = 0;  /* per specs */
 658
 659         return 0;
 660 }
 661
 662 static int ssb_pci_sprom_get(struct ssb_bus *bus,
 663                              struct ssb_sprom *sprom)
 664 {
 665         int err;
 666         u16 *buf;
 667
 668         if (!ssb_is_sprom_available(bus)) {
 669                 ssb_printk(KERN_ERR PFX "No SPROM available!\n");
 670                 return -ENODEV;
 671         }
 672         if (bus->chipco.dev) {  /* can be unavailable! */
 673                 /*
 674                  * get SPROM offset: SSB_SPROM_BASE1 except for
 675                  * chipcommon rev >= 31 or chip ID is 0x4312 and
 676                  * chipcommon status & 3 == 2
 677                  */
 678                 if (bus->chipco.dev->id.revision >= 31)
 679                         bus->sprom_offset = SSB_SPROM_BASE31;
 680                 else if (bus->chip_id == 0x4312 &&
 681                          (bus->chipco.status & 0x03) == 2)
 682                         bus->sprom_offset = SSB_SPROM_BASE31;
 683                 else
 684                         bus->sprom_offset = SSB_SPROM_BASE1;
 685         } else {
 686                 bus->sprom_offset = SSB_SPROM_BASE1;
 687         }
 688         ssb_dprintk(KERN_INFO PFX "SPROM offset is 0x%x\n", bus->sprom_offset);
 689
 690         buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
 691         if (!buf)
 692                 return -ENOMEM;
 693         bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
 694         sprom_do_read(bus, buf);
 695         err = sprom_check_crc(buf, bus->sprom_size);
 696         if (err) {
 697                 /* try for a 440 byte SPROM - revision 4 and higher */
 698                 kfree(buf);
 699                 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
 700                               GFP_KERNEL);
 701                 if (!buf)
 702                         return -ENOMEM;
 703                 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
 704                 sprom_do_read(bus, buf);
 705                 err = sprom_check_crc(buf, bus->sprom_size);
 706                 if (err) {
 707                         /* All CRC attempts failed.
 708                          * Maybe there is no SPROM on the device?
 709                          * Now we ask the arch code if there is some sprom
 710                          * available for this device in some other storage */
 711                         err = ssb_fill_sprom_with_fallback(bus, sprom);
 712                         if (err) {
 713                                 ssb_printk(KERN_WARNING PFX "WARNING: Using"
 714                                            " fallback SPROM failed (err %d)\n",
 715                                            err);
 716                         } else {
 717                                 ssb_dprintk(KERN_DEBUG PFX "Using SPROM"
 718                                             " revision %d provided by"
 719                                             " platform.\n", sprom->revision);
 720                                 err = 0;
 721                                 goto out_free;
 722                         }
 723                         ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
 724                                    " SPROM CRC (corrupt SPROM)\n");
 725                 }
 726         }
 727         err = sprom_extract(bus, sprom, buf, bus->sprom_size);
 728
 729 out_free:
 730         kfree(buf);
 731         return err;
 732 }
 733
 734 static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
 735                                   struct ssb_boardinfo *bi)
 736 {
 737         bi->vendor = bus->host_pci->subsystem_vendor;
 738         bi->type = bus->host_pci->subsystem_device;
 739         bi->rev = bus->host_pci->revision;
 740 }
 741
 742 int ssb_pci_get_invariants(struct ssb_bus *bus,
 743                            struct ssb_init_invariants *iv)
 744 {
 745         int err;
 746
 747         err = ssb_pci_sprom_get(bus, &iv->sprom);
 748         if (err)
 749                 goto out;
 750         ssb_pci_get_boardinfo(bus, &iv->boardinfo);
 751
 752 out:
 753         return err;
 754 }
 755
 756 #ifdef CONFIG_SSB_DEBUG
 757 static int ssb_pci_assert_buspower(struct ssb_bus *bus)
 758 {
 759         if (likely(bus->powered_up))
 760                 return 0;
 761
 762         printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
 763                "while accessing PCI MMIO space\n");
 764         if (bus->power_warn_count <= 10) {
 765                 bus->power_warn_count++;
 766                 dump_stack();
 767         }
 768
 769         return -ENODEV;
 770 }
 771 #else /* DEBUG */
 772 static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
 773 {
 774         return 0;
 775 }
 776 #endif /* DEBUG */
 777
 778 static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
 779 {
 780         struct ssb_bus *bus = dev->bus;
 781
 782         if (unlikely(ssb_pci_assert_buspower(bus)))
 783                 return 0xFF;
 784         if (unlikely(bus->mapped_device != dev)) {
 785                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 786                         return 0xFF;
 787         }
 788         return ioread8(bus->mmio + offset);
 789 }
 790
 791 static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
 792 {
 793         struct ssb_bus *bus = dev->bus;
 794
 795         if (unlikely(ssb_pci_assert_buspower(bus)))
 796                 return 0xFFFF;
 797         if (unlikely(bus->mapped_device != dev)) {
 798                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 799                         return 0xFFFF;
 800         }
 801         return ioread16(bus->mmio + offset);
 802 }
 803
 804 static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
 805 {
 806         struct ssb_bus *bus = dev->bus;
 807
 808         if (unlikely(ssb_pci_assert_buspower(bus)))
 809                 return 0xFFFFFFFF;
 810         if (unlikely(bus->mapped_device != dev)) {
 811                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 812                         return 0xFFFFFFFF;
 813         }
 814         return ioread32(bus->mmio + offset);
 815 }
 816
 817 #ifdef CONFIG_SSB_BLOCKIO
 818 static void ssb_pci_block_read(struct ssb_device *dev, void *buffer,
 819                                size_t count, u16 offset, u8 reg_width)
 820 {
 821         struct ssb_bus *bus = dev->bus;
 822         void __iomem *addr = bus->mmio + offset;
 823
 824         if (unlikely(ssb_pci_assert_buspower(bus)))
 825                 goto error;
 826         if (unlikely(bus->mapped_device != dev)) {
 827                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 828                         goto error;
 829         }
 830         switch (reg_width) {
 831         case sizeof(u8):
 832                 ioread8_rep(addr, buffer, count);
 833                 break;
 834         case sizeof(u16):
 835                 SSB_WARN_ON(count & 1);
 836                 ioread16_rep(addr, buffer, count >> 1);
 837                 break;
 838         case sizeof(u32):
 839                 SSB_WARN_ON(count & 3);
 840                 ioread32_rep(addr, buffer, count >> 2);
 841                 break;
 842         default:
 843                 SSB_WARN_ON(1);
 844         }
 845
 846         return;
 847 error:
 848         memset(buffer, 0xFF, count);
 849 }
 850 #endif /* CONFIG_SSB_BLOCKIO */
 851
 852 static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
 853 {
 854         struct ssb_bus *bus = dev->bus;
 855
 856         if (unlikely(ssb_pci_assert_buspower(bus)))
 857                 return;
 858         if (unlikely(bus->mapped_device != dev)) {
 859                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 860                         return;
 861         }
 862         iowrite8(value, bus->mmio + offset);
 863 }
 864
 865 static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
 866 {
 867         struct ssb_bus *bus = dev->bus;
 868
 869         if (unlikely(ssb_pci_assert_buspower(bus)))
 870                 return;
 871         if (unlikely(bus->mapped_device != dev)) {
 872                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 873                         return;
 874         }
 875         iowrite16(value, bus->mmio + offset);
 876 }
 877
 878 static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
 879 {
 880         struct ssb_bus *bus = dev->bus;
 881
 882         if (unlikely(ssb_pci_assert_buspower(bus)))
 883                 return;
 884         if (unlikely(bus->mapped_device != dev)) {
 885                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 886                         return;
 887         }
 888         iowrite32(value, bus->mmio + offset);
 889 }
 890
 891 #ifdef CONFIG_SSB_BLOCKIO
 892 static void ssb_pci_block_write(struct ssb_device *dev, const void *buffer,
 893                                 size_t count, u16 offset, u8 reg_width)
 894 {
 895         struct ssb_bus *bus = dev->bus;
 896         void __iomem *addr = bus->mmio + offset;
 897
 898         if (unlikely(ssb_pci_assert_buspower(bus)))
 899                 return;
 900         if (unlikely(bus->mapped_device != dev)) {
 901                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 902                         return;
 903         }
 904         switch (reg_width) {
 905         case sizeof(u8):
 906                 iowrite8_rep(addr, buffer, count);
 907                 break;
 908         case sizeof(u16):
 909                 SSB_WARN_ON(count & 1);
 910                 iowrite16_rep(addr, buffer, count >> 1);
 911                 break;
 912         case sizeof(u32):
 913                 SSB_WARN_ON(count & 3);
 914                 iowrite32_rep(addr, buffer, count >> 2);
 915                 break;
 916         default:
 917                 SSB_WARN_ON(1);
 918         }
 919 }
 920 #endif /* CONFIG_SSB_BLOCKIO */
 921
 922 /* Not "static", as it's used in main.c */
 923 const struct ssb_bus_ops ssb_pci_ops = {
 924         .read8          = ssb_pci_read8,
 925         .read16         = ssb_pci_read16,
 926         .read32         = ssb_pci_read32,
 927         .write8         = ssb_pci_write8,
 928         .write16        = ssb_pci_write16,
 929         .write32        = ssb_pci_write32,
 930 #ifdef CONFIG_SSB_BLOCKIO
 931         .block_read     = ssb_pci_block_read,
 932         .block_write    = ssb_pci_block_write,
 933 #endif
 934 };
 935
 936 static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
 937                                        struct device_attribute *attr,
 938                                        char *buf)
 939 {
 940         struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
 941         struct ssb_bus *bus;
 942
 943         bus = ssb_pci_dev_to_bus(pdev);
 944         if (!bus)
 945                 return -ENODEV;
 946
 947         return ssb_attr_sprom_show(bus, buf, sprom_do_read);
 948 }
 949
 950 static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
 951                                         struct device_attribute *attr,
 952                                         const char *buf, size_t count)
 953 {
 954         struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
 955         struct ssb_bus *bus;
 956
 957         bus = ssb_pci_dev_to_bus(pdev);
 958         if (!bus)
 959                 return -ENODEV;
 960
 961         return ssb_attr_sprom_store(bus, buf, count,
 962                                     sprom_check_crc, sprom_do_write);
 963 }
 964
 965 static DEVICE_ATTR(ssb_sprom, 0600,
 966                    ssb_pci_attr_sprom_show,
 967                    ssb_pci_attr_sprom_store);
 968
 969 void ssb_pci_exit(struct ssb_bus *bus)
 970 {
 971         struct pci_dev *pdev;
 972
 973         if (bus->bustype != SSB_BUSTYPE_PCI)
 974                 return;
 975
 976         pdev = bus->host_pci;
 977         device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
 978 }
 979
 980 int ssb_pci_init(struct ssb_bus *bus)
 981 {
 982         struct pci_dev *pdev;
 983         int err;
 984
 985         if (bus->bustype != SSB_BUSTYPE_PCI)
 986                 return 0;
 987
 988         pdev = bus->host_pci;
 989         mutex_init(&bus->sprom_mutex);
 990         err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
 991         if (err)
 992                 goto out;
 993
 994 out:
 995         return err;
 996 }