drivers/ssb/pci.c

   1 /*
   2  * Sonics Silicon Backplane PCI-Hostbus related functions.
   3  *
   4  * Copyright (C) 2005-2006 Michael Buesch <mb@bu3sch.de>
   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/pci.h>
  21 #include <linux/delay.h>
  22
  23 #include "ssb_private.h"
  24
  25
  26 /* Define the following to 1 to enable a printk on each coreswitch. */
  27 #define SSB_VERBOSE_PCICORESWITCH_DEBUG         0
  28
  29
  30 /* Lowlevel coreswitching */
  31 int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
  32 {
  33         int err;
  34         int attempts = 0;
  35         u32 cur_core;
  36
  37         while (1) {
  38                 err = pci_write_config_dword(bus->host_pci, SSB_BAR0_WIN,
  39                                              (coreidx * SSB_CORE_SIZE)
  40                                              + SSB_ENUM_BASE);
  41                 if (err)
  42                         goto error;
  43                 err = pci_read_config_dword(bus->host_pci, SSB_BAR0_WIN,
  44                                             &cur_core);
  45                 if (err)
  46                         goto error;
  47                 cur_core = (cur_core - SSB_ENUM_BASE)
  48                            / SSB_CORE_SIZE;
  49                 if (cur_core == coreidx)
  50                         break;
  51
  52                 if (attempts++ > SSB_BAR0_MAX_RETRIES)
  53                         goto error;
  54                 udelay(10);
  55         }
  56         return 0;
  57 error:
  58         ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
  59         return -ENODEV;
  60 }
  61
  62 int ssb_pci_switch_core(struct ssb_bus *bus,
  63                         struct ssb_device *dev)
  64 {
  65         int err;
  66         unsigned long flags;
  67
  68 #if SSB_VERBOSE_PCICORESWITCH_DEBUG
  69         ssb_printk(KERN_INFO PFX
  70                    "Switching to %s core, index %d\n",
  71                    ssb_core_name(dev->id.coreid),
  72                    dev->core_index);
  73 #endif
  74
  75         spin_lock_irqsave(&bus->bar_lock, flags);
  76         err = ssb_pci_switch_coreidx(bus, dev->core_index);
  77         if (!err)
  78                 bus->mapped_device = dev;
  79         spin_unlock_irqrestore(&bus->bar_lock, flags);
  80
  81         return err;
  82 }
  83
  84 /* Enable/disable the on board crystal oscillator and/or PLL. */
  85 int ssb_pci_xtal(struct ssb_bus *bus, u32 what, int turn_on)
  86 {
  87         int err;
  88         u32 in, out, outenable;
  89         u16 pci_status;
  90
  91         if (bus->bustype != SSB_BUSTYPE_PCI)
  92                 return 0;
  93
  94         err = pci_read_config_dword(bus->host_pci, SSB_GPIO_IN, &in);
  95         if (err)
  96                 goto err_pci;
  97         err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT, &out);
  98         if (err)
  99                 goto err_pci;
 100         err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, &outenable);
 101         if (err)
 102                 goto err_pci;
 103
 104         outenable |= what;
 105
 106         if (turn_on) {
 107                 /* Avoid glitching the clock if GPRS is already using it.
 108                  * We can't actually read the state of the PLLPD so we infer it
 109                  * by the value of XTAL_PU which *is* readable via gpioin.
 110                  */
 111                 if (!(in & SSB_GPIO_XTAL)) {
 112                         if (what & SSB_GPIO_XTAL) {
 113                                 /* Turn the crystal on */
 114                                 out |= SSB_GPIO_XTAL;
 115                                 if (what & SSB_GPIO_PLL)
 116                                         out |= SSB_GPIO_PLL;
 117                                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
 118                                 if (err)
 119                                         goto err_pci;
 120                                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE,
 121                                                              outenable);
 122                                 if (err)
 123                                         goto err_pci;
 124                                 msleep(1);
 125                         }
 126                         if (what & SSB_GPIO_PLL) {
 127                                 /* Turn the PLL on */
 128                                 out &= ~SSB_GPIO_PLL;
 129                                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
 130                                 if (err)
 131                                         goto err_pci;
 132                                 msleep(5);
 133                         }
 134                 }
 135
 136                 err = pci_read_config_word(bus->host_pci, PCI_STATUS, &pci_status);
 137                 if (err)
 138                         goto err_pci;
 139                 pci_status &= ~PCI_STATUS_SIG_TARGET_ABORT;
 140                 err = pci_write_config_word(bus->host_pci, PCI_STATUS, pci_status);
 141                 if (err)
 142                         goto err_pci;
 143         } else {
 144                 if (what & SSB_GPIO_XTAL) {
 145                         /* Turn the crystal off */
 146                         out &= ~SSB_GPIO_XTAL;
 147                 }
 148                 if (what & SSB_GPIO_PLL) {
 149                         /* Turn the PLL off */
 150                         out |= SSB_GPIO_PLL;
 151                 }
 152                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
 153                 if (err)
 154                         goto err_pci;
 155                 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, outenable);
 156                 if (err)
 157                         goto err_pci;
 158         }
 159
 160 out:
 161         return err;
 162
 163 err_pci:
 164         printk(KERN_ERR PFX "Error: ssb_pci_xtal() could not access PCI config space!\n");
 165         err = -EBUSY;
 166         goto out;
 167 }
 168
 169 /* Get the word-offset for a SSB_SPROM_XXX define. */
 170 #define SPOFF(offset)   (((offset) - SSB_SPROM_BASE) / sizeof(u16))
 171 /* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
 172 #define SPEX(_outvar, _offset, _mask, _shift)   \
 173         out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
 174
 175 static inline u8 ssb_crc8(u8 crc, u8 data)
 176 {
 177         /* Polynomial:   x^8 + x^7 + x^6 + x^4 + x^2 + 1   */
 178         static const u8 t[] = {
 179                 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
 180                 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
 181                 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
 182                 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
 183                 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
 184                 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
 185                 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
 186                 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
 187                 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
 188                 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
 189                 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
 190                 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
 191                 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
 192                 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
 193                 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
 194                 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
 195                 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
 196                 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
 197                 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
 198                 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
 199                 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
 200                 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
 201                 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
 202                 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
 203                 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
 204                 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
 205                 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
 206                 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
 207                 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
 208                 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
 209                 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
 210                 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
 211         };
 212         return t[crc ^ data];
 213 }
 214
 215 static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
 216 {
 217         int word;
 218         u8 crc = 0xFF;
 219
 220         for (word = 0; word < size - 1; word++) {
 221                 crc = ssb_crc8(crc, sprom[word] & 0x00FF);
 222                 crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
 223         }
 224         crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
 225         crc ^= 0xFF;
 226
 227         return crc;
 228 }
 229
 230 static int sprom_check_crc(const u16 *sprom, size_t size)
 231 {
 232         u8 crc;
 233         u8 expected_crc;
 234         u16 tmp;
 235
 236         crc = ssb_sprom_crc(sprom, size);
 237         tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
 238         expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
 239         if (crc != expected_crc)
 240                 return -EPROTO;
 241
 242         return 0;
 243 }
 244
 245 static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
 246 {
 247         int i;
 248
 249         for (i = 0; i < bus->sprom_size; i++)
 250                 sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
 251
 252         return 0;
 253 }
 254
 255 static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
 256 {
 257         struct pci_dev *pdev = bus->host_pci;
 258         int i, err;
 259         u32 spromctl;
 260         u16 size = bus->sprom_size;
 261
 262         ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
 263         err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
 264         if (err)
 265                 goto err_ctlreg;
 266         spromctl |= SSB_SPROMCTL_WE;
 267         err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
 268         if (err)
 269                 goto err_ctlreg;
 270         ssb_printk(KERN_NOTICE PFX "[ 0%%");
 271         msleep(500);
 272         for (i = 0; i < size; i++) {
 273                 if (i == size / 4)
 274                         ssb_printk("25%%");
 275                 else if (i == size / 2)
 276                         ssb_printk("50%%");
 277                 else if (i == (size * 3) / 4)
 278                         ssb_printk("75%%");
 279                 else if (i % 2)
 280                         ssb_printk(".");
 281                 writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
 282                 mmiowb();
 283                 msleep(20);
 284         }
 285         err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
 286         if (err)
 287                 goto err_ctlreg;
 288         spromctl &= ~SSB_SPROMCTL_WE;
 289         err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
 290         if (err)
 291                 goto err_ctlreg;
 292         msleep(500);
 293         ssb_printk("100%% ]\n");
 294         ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
 295
 296         return 0;
 297 err_ctlreg:
 298         ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
 299         return err;
 300 }
 301
 302 static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
 303                                u16 mask, u16 shift)
 304 {
 305         u16 v;
 306         u8 gain;
 307
 308         v = in[SPOFF(SSB_SPROM1_AGAIN)];
 309         gain = (v & mask) >> shift;
 310         if (gain == 0xFF)
 311                 gain = 2; /* If unset use 2dBm */
 312         if (sprom_revision == 1) {
 313                 /* Convert to Q5.2 */
 314                 gain <<= 2;
 315         } else {
 316                 /* Q5.2 Fractional part is stored in 0xC0 */
 317                 gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
 318         }
 319
 320         return (s8)gain;
 321 }
 322
 323 static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
 324 {
 325         int i;
 326         u16 v;
 327         s8 gain;
 328         u16 loc[3];
 329
 330         if (out->revision == 3)                 /* rev 3 moved MAC */
 331                 loc[0] = SSB_SPROM3_IL0MAC;
 332         else {
 333                 loc[0] = SSB_SPROM1_IL0MAC;
 334                 loc[1] = SSB_SPROM1_ET0MAC;
 335                 loc[2] = SSB_SPROM1_ET1MAC;
 336         }
 337         for (i = 0; i < 3; i++) {
 338                 v = in[SPOFF(loc[0]) + i];
 339                 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
 340         }
 341         if (out->revision < 3) {        /* only rev 1-2 have et0, et1 */
 342                 for (i = 0; i < 3; i++) {
 343                         v = in[SPOFF(loc[1]) + i];
 344                         *(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
 345                 }
 346                 for (i = 0; i < 3; i++) {
 347                         v = in[SPOFF(loc[2]) + i];
 348                         *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
 349                 }
 350         }
 351         SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
 352         SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
 353              SSB_SPROM1_ETHPHY_ET1A_SHIFT);
 354         SPEX(et0mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0M, 14);
 355         SPEX(et1mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1M, 15);
 356         SPEX(board_rev, SSB_SPROM1_BINF, SSB_SPROM1_BINF_BREV, 0);
 357         SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
 358              SSB_SPROM1_BINF_CCODE_SHIFT);
 359         SPEX(ant_available_a, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTA,
 360              SSB_SPROM1_BINF_ANTA_SHIFT);
 361         SPEX(ant_available_bg, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTBG,
 362              SSB_SPROM1_BINF_ANTBG_SHIFT);
 363         SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
 364         SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
 365         SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
 366         SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
 367         SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
 368         SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
 369         SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
 370         SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
 371              SSB_SPROM1_GPIOA_P1_SHIFT);
 372         SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
 373         SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
 374              SSB_SPROM1_GPIOB_P3_SHIFT);
 375         SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
 376              SSB_SPROM1_MAXPWR_A_SHIFT);
 377         SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
 378         SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
 379              SSB_SPROM1_ITSSI_A_SHIFT);
 380         SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
 381         SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
 382         if (out->revision >= 2)
 383                 SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
 384
 385         /* Extract the antenna gain values. */
 386         gain = r123_extract_antgain(out->revision, in,
 387                                     SSB_SPROM1_AGAIN_BG,
 388                                     SSB_SPROM1_AGAIN_BG_SHIFT);
 389         out->antenna_gain.ghz24.a0 = gain;
 390         out->antenna_gain.ghz24.a1 = gain;
 391         out->antenna_gain.ghz24.a2 = gain;
 392         out->antenna_gain.ghz24.a3 = gain;
 393         gain = r123_extract_antgain(out->revision, in,
 394                                     SSB_SPROM1_AGAIN_A,
 395                                     SSB_SPROM1_AGAIN_A_SHIFT);
 396         out->antenna_gain.ghz5.a0 = gain;
 397         out->antenna_gain.ghz5.a1 = gain;
 398         out->antenna_gain.ghz5.a2 = gain;
 399         out->antenna_gain.ghz5.a3 = gain;
 400 }
 401
 402 static void sprom_extract_r45(struct ssb_sprom *out, const u16 *in)
 403 {
 404         int i;
 405         u16 v;
 406         u16 il0mac_offset;
 407
 408         if (out->revision == 4)
 409                 il0mac_offset = SSB_SPROM4_IL0MAC;
 410         else
 411                 il0mac_offset = SSB_SPROM5_IL0MAC;
 412         /* extract the MAC address */
 413         for (i = 0; i < 3; i++) {
 414                 v = in[SPOFF(il0mac_offset) + i];
 415                 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
 416         }
 417         SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
 418         SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
 419              SSB_SPROM4_ETHPHY_ET1A_SHIFT);
 420         if (out->revision == 4) {
 421                 SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
 422                 SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
 423                 SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
 424         } else {
 425                 SPEX(country_code, SSB_SPROM5_CCODE, 0xFFFF, 0);
 426                 SPEX(boardflags_lo, SSB_SPROM5_BFLLO, 0xFFFF, 0);
 427                 SPEX(boardflags_hi, SSB_SPROM5_BFLHI, 0xFFFF, 0);
 428         }
 429         SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
 430              SSB_SPROM4_ANTAVAIL_A_SHIFT);
 431         SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
 432              SSB_SPROM4_ANTAVAIL_BG_SHIFT);
 433         SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
 434         SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
 435              SSB_SPROM4_ITSSI_BG_SHIFT);
 436         SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
 437         SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
 438              SSB_SPROM4_ITSSI_A_SHIFT);
 439         if (out->revision == 4) {
 440                 SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
 441                 SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
 442                      SSB_SPROM4_GPIOA_P1_SHIFT);
 443                 SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
 444                 SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
 445                      SSB_SPROM4_GPIOB_P3_SHIFT);
 446         } else {
 447                 SPEX(gpio0, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P0, 0);
 448                 SPEX(gpio1, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P1,
 449                      SSB_SPROM5_GPIOA_P1_SHIFT);
 450                 SPEX(gpio2, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P2, 0);
 451                 SPEX(gpio3, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P3,
 452                      SSB_SPROM5_GPIOB_P3_SHIFT);
 453         }
 454
 455         /* Extract the antenna gain values. */
 456         SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
 457              SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
 458         SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
 459              SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
 460         SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
 461              SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
 462         SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
 463              SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
 464         memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
 465                sizeof(out->antenna_gain.ghz5));
 466
 467         /* TODO - get remaining rev 4 stuff needed */
 468 }
 469
 470 static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
 471                          const u16 *in, u16 size)
 472 {
 473         memset(out, 0, sizeof(*out));
 474
 475         out->revision = in[size - 1] & 0x00FF;
 476         ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
 477         memset(out->et0mac, 0xFF, 6);           /* preset et0 and et1 mac */
 478         memset(out->et1mac, 0xFF, 6);
 479         if ((bus->chip_id & 0xFF00) == 0x4400) {
 480                 /* Workaround: The BCM44XX chip has a stupid revision
 481                  * number stored in the SPROM.
 482                  * Always extract r1. */
 483                 out->revision = 1;
 484                 sprom_extract_r123(out, in);
 485         } else if (bus->chip_id == 0x4321) {
 486                 /* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
 487                 out->revision = 4;
 488                 sprom_extract_r45(out, in);
 489         } else {
 490                 if (out->revision == 0)
 491                         goto unsupported;
 492                 if (out->revision >= 1 && out->revision <= 3) {
 493                         sprom_extract_r123(out, in);
 494                 }
 495                 if (out->revision == 4 || out->revision == 5)
 496                         sprom_extract_r45(out, in);
 497                 if (out->revision > 5)
 498                         goto unsupported;
 499         }
 500
 501         if (out->boardflags_lo == 0xFFFF)
 502                 out->boardflags_lo = 0;  /* per specs */
 503         if (out->boardflags_hi == 0xFFFF)
 504                 out->boardflags_hi = 0;  /* per specs */
 505
 506         return 0;
 507 unsupported:
 508         ssb_printk(KERN_WARNING PFX "Unsupported SPROM revision %d "
 509                    "detected. Will extract v1\n", out->revision);
 510         sprom_extract_r123(out, in);
 511         return 0;
 512 }
 513
 514 static int ssb_pci_sprom_get(struct ssb_bus *bus,
 515                              struct ssb_sprom *sprom)
 516 {
 517         int err = -ENOMEM;
 518         u16 *buf;
 519
 520         buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
 521         if (!buf)
 522                 goto out;
 523         bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
 524         sprom_do_read(bus, buf);
 525         err = sprom_check_crc(buf, bus->sprom_size);
 526         if (err) {
 527                 /* try for a 440 byte SPROM - revision 4 and higher */
 528                 kfree(buf);
 529                 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
 530                               GFP_KERNEL);
 531                 if (!buf)
 532                         goto out;
 533                 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
 534                 sprom_do_read(bus, buf);
 535                 err = sprom_check_crc(buf, bus->sprom_size);
 536                 if (err)
 537                         ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
 538                                    " SPROM CRC (corrupt SPROM)\n");
 539         }
 540         err = sprom_extract(bus, sprom, buf, bus->sprom_size);
 541
 542         kfree(buf);
 543 out:
 544         return err;
 545 }
 546
 547 static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
 548                                   struct ssb_boardinfo *bi)
 549 {
 550         pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
 551                              &bi->vendor);
 552         pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
 553                              &bi->type);
 554         pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
 555                              &bi->rev);
 556 }
 557
 558 int ssb_pci_get_invariants(struct ssb_bus *bus,
 559                            struct ssb_init_invariants *iv)
 560 {
 561         int err;
 562
 563         err = ssb_pci_sprom_get(bus, &iv->sprom);
 564         if (err)
 565                 goto out;
 566         ssb_pci_get_boardinfo(bus, &iv->boardinfo);
 567
 568 out:
 569         return err;
 570 }
 571
 572 #ifdef CONFIG_SSB_DEBUG
 573 static int ssb_pci_assert_buspower(struct ssb_bus *bus)
 574 {
 575         if (likely(bus->powered_up))
 576                 return 0;
 577
 578         printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
 579                "while accessing PCI MMIO space\n");
 580         if (bus->power_warn_count <= 10) {
 581                 bus->power_warn_count++;
 582                 dump_stack();
 583         }
 584
 585         return -ENODEV;
 586 }
 587 #else /* DEBUG */
 588 static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
 589 {
 590         return 0;
 591 }
 592 #endif /* DEBUG */
 593
 594 static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
 595 {
 596         struct ssb_bus *bus = dev->bus;
 597
 598         if (unlikely(ssb_pci_assert_buspower(bus)))
 599                 return 0xFF;
 600         if (unlikely(bus->mapped_device != dev)) {
 601                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 602                         return 0xFF;
 603         }
 604         return ioread8(bus->mmio + offset);
 605 }
 606
 607 static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
 608 {
 609         struct ssb_bus *bus = dev->bus;
 610
 611         if (unlikely(ssb_pci_assert_buspower(bus)))
 612                 return 0xFFFF;
 613         if (unlikely(bus->mapped_device != dev)) {
 614                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 615                         return 0xFFFF;
 616         }
 617         return ioread16(bus->mmio + offset);
 618 }
 619
 620 static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
 621 {
 622         struct ssb_bus *bus = dev->bus;
 623
 624         if (unlikely(ssb_pci_assert_buspower(bus)))
 625                 return 0xFFFFFFFF;
 626         if (unlikely(bus->mapped_device != dev)) {
 627                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 628                         return 0xFFFFFFFF;
 629         }
 630         return ioread32(bus->mmio + offset);
 631 }
 632
 633 #ifdef CONFIG_SSB_BLOCKIO
 634 static void ssb_pci_block_read(struct ssb_device *dev, void *buffer,
 635                                size_t count, u16 offset, u8 reg_width)
 636 {
 637         struct ssb_bus *bus = dev->bus;
 638         void __iomem *addr = bus->mmio + offset;
 639
 640         if (unlikely(ssb_pci_assert_buspower(bus)))
 641                 goto error;
 642         if (unlikely(bus->mapped_device != dev)) {
 643                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 644                         goto error;
 645         }
 646         switch (reg_width) {
 647         case sizeof(u8):
 648                 ioread8_rep(addr, buffer, count);
 649                 break;
 650         case sizeof(u16):
 651                 SSB_WARN_ON(count & 1);
 652                 ioread16_rep(addr, buffer, count >> 1);
 653                 break;
 654         case sizeof(u32):
 655                 SSB_WARN_ON(count & 3);
 656                 ioread32_rep(addr, buffer, count >> 2);
 657                 break;
 658         default:
 659                 SSB_WARN_ON(1);
 660         }
 661
 662         return;
 663 error:
 664         memset(buffer, 0xFF, count);
 665 }
 666 #endif /* CONFIG_SSB_BLOCKIO */
 667
 668 static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
 669 {
 670         struct ssb_bus *bus = dev->bus;
 671
 672         if (unlikely(ssb_pci_assert_buspower(bus)))
 673                 return;
 674         if (unlikely(bus->mapped_device != dev)) {
 675                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 676                         return;
 677         }
 678         iowrite8(value, bus->mmio + offset);
 679 }
 680
 681 static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
 682 {
 683         struct ssb_bus *bus = dev->bus;
 684
 685         if (unlikely(ssb_pci_assert_buspower(bus)))
 686                 return;
 687         if (unlikely(bus->mapped_device != dev)) {
 688                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 689                         return;
 690         }
 691         iowrite16(value, bus->mmio + offset);
 692 }
 693
 694 static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
 695 {
 696         struct ssb_bus *bus = dev->bus;
 697
 698         if (unlikely(ssb_pci_assert_buspower(bus)))
 699                 return;
 700         if (unlikely(bus->mapped_device != dev)) {
 701                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 702                         return;
 703         }
 704         iowrite32(value, bus->mmio + offset);
 705 }
 706
 707 #ifdef CONFIG_SSB_BLOCKIO
 708 static void ssb_pci_block_write(struct ssb_device *dev, const void *buffer,
 709                                 size_t count, u16 offset, u8 reg_width)
 710 {
 711         struct ssb_bus *bus = dev->bus;
 712         void __iomem *addr = bus->mmio + offset;
 713
 714         if (unlikely(ssb_pci_assert_buspower(bus)))
 715                 return;
 716         if (unlikely(bus->mapped_device != dev)) {
 717                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 718                         return;
 719         }
 720         switch (reg_width) {
 721         case sizeof(u8):
 722                 iowrite8_rep(addr, buffer, count);
 723                 break;
 724         case sizeof(u16):
 725                 SSB_WARN_ON(count & 1);
 726                 iowrite16_rep(addr, buffer, count >> 1);
 727                 break;
 728         case sizeof(u32):
 729                 SSB_WARN_ON(count & 3);
 730                 iowrite32_rep(addr, buffer, count >> 2);
 731                 break;
 732         default:
 733                 SSB_WARN_ON(1);
 734         }
 735 }
 736 #endif /* CONFIG_SSB_BLOCKIO */
 737
 738 /* Not "static", as it's used in main.c */
 739 const struct ssb_bus_ops ssb_pci_ops = {
 740         .read8          = ssb_pci_read8,
 741         .read16         = ssb_pci_read16,
 742         .read32         = ssb_pci_read32,
 743         .write8         = ssb_pci_write8,
 744         .write16        = ssb_pci_write16,
 745         .write32        = ssb_pci_write32,
 746 #ifdef CONFIG_SSB_BLOCKIO
 747         .block_read     = ssb_pci_block_read,
 748         .block_write    = ssb_pci_block_write,
 749 #endif
 750 };
 751
 752 static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
 753                                        struct device_attribute *attr,
 754                                        char *buf)
 755 {
 756         struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
 757         struct ssb_bus *bus;
 758
 759         bus = ssb_pci_dev_to_bus(pdev);
 760         if (!bus)
 761                 return -ENODEV;
 762
 763         return ssb_attr_sprom_show(bus, buf, sprom_do_read);
 764 }
 765
 766 static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
 767                                         struct device_attribute *attr,
 768                                         const char *buf, size_t count)
 769 {
 770         struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
 771         struct ssb_bus *bus;
 772
 773         bus = ssb_pci_dev_to_bus(pdev);
 774         if (!bus)
 775                 return -ENODEV;
 776
 777         return ssb_attr_sprom_store(bus, buf, count,
 778                                     sprom_check_crc, sprom_do_write);
 779 }
 780
 781 static DEVICE_ATTR(ssb_sprom, 0600,
 782                    ssb_pci_attr_sprom_show,
 783                    ssb_pci_attr_sprom_store);
 784
 785 void ssb_pci_exit(struct ssb_bus *bus)
 786 {
 787         struct pci_dev *pdev;
 788
 789         if (bus->bustype != SSB_BUSTYPE_PCI)
 790                 return;
 791
 792         pdev = bus->host_pci;
 793         device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
 794 }
 795
 796 int ssb_pci_init(struct ssb_bus *bus)
 797 {
 798         struct pci_dev *pdev;
 799         int err;
 800
 801         if (bus->bustype != SSB_BUSTYPE_PCI)
 802                 return 0;
 803
 804         pdev = bus->host_pci;
 805         mutex_init(&bus->sprom_mutex);
 806         err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
 807         if (err)
 808                 goto out;
 809
 810 out:
 811         return err;
 812 }