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/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) - SSB_SPROM_BASE) / 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 + SSB_SPROM_BASE + (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 + SSB_SPROM_BASE + (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 static void sprom_extract_r45(struct ssb_sprom *out, const u16 *in)
 410 {
 411         int i;
 412         u16 v;
 413         u16 il0mac_offset;
 414
 415         if (out->revision == 4)
 416                 il0mac_offset = SSB_SPROM4_IL0MAC;
 417         else
 418                 il0mac_offset = SSB_SPROM5_IL0MAC;
 419         /* extract the MAC address */
 420         for (i = 0; i < 3; i++) {
 421                 v = in[SPOFF(il0mac_offset) + i];
 422                 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
 423         }
 424         SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
 425         SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
 426              SSB_SPROM4_ETHPHY_ET1A_SHIFT);
 427         if (out->revision == 4) {
 428                 SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
 429                 SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
 430                 SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
 431         } else {
 432                 SPEX(country_code, SSB_SPROM5_CCODE, 0xFFFF, 0);
 433                 SPEX(boardflags_lo, SSB_SPROM5_BFLLO, 0xFFFF, 0);
 434                 SPEX(boardflags_hi, SSB_SPROM5_BFLHI, 0xFFFF, 0);
 435         }
 436         SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
 437              SSB_SPROM4_ANTAVAIL_A_SHIFT);
 438         SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
 439              SSB_SPROM4_ANTAVAIL_BG_SHIFT);
 440         SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
 441         SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
 442              SSB_SPROM4_ITSSI_BG_SHIFT);
 443         SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
 444         SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
 445              SSB_SPROM4_ITSSI_A_SHIFT);
 446         if (out->revision == 4) {
 447                 SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
 448                 SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
 449                      SSB_SPROM4_GPIOA_P1_SHIFT);
 450                 SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
 451                 SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
 452                      SSB_SPROM4_GPIOB_P3_SHIFT);
 453         } else {
 454                 SPEX(gpio0, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P0, 0);
 455                 SPEX(gpio1, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P1,
 456                      SSB_SPROM5_GPIOA_P1_SHIFT);
 457                 SPEX(gpio2, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P2, 0);
 458                 SPEX(gpio3, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P3,
 459                      SSB_SPROM5_GPIOB_P3_SHIFT);
 460         }
 461
 462         /* Extract the antenna gain values. */
 463         SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
 464              SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
 465         SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
 466              SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
 467         SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
 468              SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
 469         SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
 470              SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
 471         memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
 472                sizeof(out->antenna_gain.ghz5));
 473
 474         /* TODO - get remaining rev 4 stuff needed */
 475 }
 476
 477 static void sprom_extract_r8(struct ssb_sprom *out, const u16 *in)
 478 {
 479         int i;
 480         u16 v;
 481
 482         /* extract the MAC address */
 483         for (i = 0; i < 3; i++) {
 484                 v = in[SPOFF(SSB_SPROM8_IL0MAC) + i];
 485                 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
 486         }
 487         SPEX(country_code, SSB_SPROM8_CCODE, 0xFFFF, 0);
 488         SPEX(boardflags_lo, SSB_SPROM8_BFLLO, 0xFFFF, 0);
 489         SPEX(boardflags_hi, SSB_SPROM8_BFLHI, 0xFFFF, 0);
 490         SPEX(boardflags2_lo, SSB_SPROM8_BFL2LO, 0xFFFF, 0);
 491         SPEX(boardflags2_hi, SSB_SPROM8_BFL2HI, 0xFFFF, 0);
 492         SPEX(ant_available_a, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_A,
 493              SSB_SPROM8_ANTAVAIL_A_SHIFT);
 494         SPEX(ant_available_bg, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_BG,
 495              SSB_SPROM8_ANTAVAIL_BG_SHIFT);
 496         SPEX(maxpwr_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_MAXP_BG_MASK, 0);
 497         SPEX(itssi_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_ITSSI_BG,
 498              SSB_SPROM8_ITSSI_BG_SHIFT);
 499         SPEX(maxpwr_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_MAXP_A_MASK, 0);
 500         SPEX(itssi_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_ITSSI_A,
 501              SSB_SPROM8_ITSSI_A_SHIFT);
 502         SPEX(maxpwr_ah, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AH_MASK, 0);
 503         SPEX(maxpwr_al, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AL_MASK,
 504              SSB_SPROM8_MAXP_AL_SHIFT);
 505         SPEX(gpio0, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P0, 0);
 506         SPEX(gpio1, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P1,
 507              SSB_SPROM8_GPIOA_P1_SHIFT);
 508         SPEX(gpio2, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P2, 0);
 509         SPEX(gpio3, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P3,
 510              SSB_SPROM8_GPIOB_P3_SHIFT);
 511         SPEX(tri2g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI2G, 0);
 512         SPEX(tri5g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI5G,
 513              SSB_SPROM8_TRI5G_SHIFT);
 514         SPEX(tri5gl, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GL, 0);
 515         SPEX(tri5gh, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GH,
 516              SSB_SPROM8_TRI5GH_SHIFT);
 517         SPEX(rxpo2g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO2G, 0);
 518         SPEX(rxpo5g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO5G,
 519              SSB_SPROM8_RXPO5G_SHIFT);
 520         SPEX(rssismf2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMF2G, 0);
 521         SPEX(rssismc2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMC2G,
 522              SSB_SPROM8_RSSISMC2G_SHIFT);
 523         SPEX(rssisav2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISAV2G,
 524              SSB_SPROM8_RSSISAV2G_SHIFT);
 525         SPEX(bxa2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_BXA2G,
 526              SSB_SPROM8_BXA2G_SHIFT);
 527         SPEX(rssismf5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMF5G, 0);
 528         SPEX(rssismc5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMC5G,
 529              SSB_SPROM8_RSSISMC5G_SHIFT);
 530         SPEX(rssisav5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISAV5G,
 531              SSB_SPROM8_RSSISAV5G_SHIFT);
 532         SPEX(bxa5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_BXA5G,
 533              SSB_SPROM8_BXA5G_SHIFT);
 534         SPEX(pa0b0, SSB_SPROM8_PA0B0, 0xFFFF, 0);
 535         SPEX(pa0b1, SSB_SPROM8_PA0B1, 0xFFFF, 0);
 536         SPEX(pa0b2, SSB_SPROM8_PA0B2, 0xFFFF, 0);
 537         SPEX(pa1b0, SSB_SPROM8_PA1B0, 0xFFFF, 0);
 538         SPEX(pa1b1, SSB_SPROM8_PA1B1, 0xFFFF, 0);
 539         SPEX(pa1b2, SSB_SPROM8_PA1B2, 0xFFFF, 0);
 540         SPEX(pa1lob0, SSB_SPROM8_PA1LOB0, 0xFFFF, 0);
 541         SPEX(pa1lob1, SSB_SPROM8_PA1LOB1, 0xFFFF, 0);
 542         SPEX(pa1lob2, SSB_SPROM8_PA1LOB2, 0xFFFF, 0);
 543         SPEX(pa1hib0, SSB_SPROM8_PA1HIB0, 0xFFFF, 0);
 544         SPEX(pa1hib1, SSB_SPROM8_PA1HIB1, 0xFFFF, 0);
 545         SPEX(pa1hib2, SSB_SPROM8_PA1HIB2, 0xFFFF, 0);
 546         SPEX(cck2gpo, SSB_SPROM8_CCK2GPO, 0xFFFF, 0);
 547         SPEX32(ofdm2gpo, SSB_SPROM8_OFDM2GPO, 0xFFFFFFFF, 0);
 548         SPEX32(ofdm5glpo, SSB_SPROM8_OFDM5GLPO, 0xFFFFFFFF, 0);
 549         SPEX32(ofdm5gpo, SSB_SPROM8_OFDM5GPO, 0xFFFFFFFF, 0);
 550         SPEX32(ofdm5ghpo, SSB_SPROM8_OFDM5GHPO, 0xFFFFFFFF, 0);
 551
 552         /* Extract the antenna gain values. */
 553         SPEX(antenna_gain.ghz24.a0, SSB_SPROM8_AGAIN01,
 554              SSB_SPROM8_AGAIN0, SSB_SPROM8_AGAIN0_SHIFT);
 555         SPEX(antenna_gain.ghz24.a1, SSB_SPROM8_AGAIN01,
 556              SSB_SPROM8_AGAIN1, SSB_SPROM8_AGAIN1_SHIFT);
 557         SPEX(antenna_gain.ghz24.a2, SSB_SPROM8_AGAIN23,
 558              SSB_SPROM8_AGAIN2, SSB_SPROM8_AGAIN2_SHIFT);
 559         SPEX(antenna_gain.ghz24.a3, SSB_SPROM8_AGAIN23,
 560              SSB_SPROM8_AGAIN3, SSB_SPROM8_AGAIN3_SHIFT);
 561         memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
 562                sizeof(out->antenna_gain.ghz5));
 563
 564         /* TODO - get remaining rev 8 stuff needed */
 565 }
 566
 567 static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
 568                          const u16 *in, u16 size)
 569 {
 570         memset(out, 0, sizeof(*out));
 571
 572         out->revision = in[size - 1] & 0x00FF;
 573         ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
 574         memset(out->et0mac, 0xFF, 6);           /* preset et0 and et1 mac */
 575         memset(out->et1mac, 0xFF, 6);
 576         if ((bus->chip_id & 0xFF00) == 0x4400) {
 577                 /* Workaround: The BCM44XX chip has a stupid revision
 578                  * number stored in the SPROM.
 579                  * Always extract r1. */
 580                 out->revision = 1;
 581                 sprom_extract_r123(out, in);
 582         } else if (bus->chip_id == 0x4321) {
 583                 /* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
 584                 out->revision = 4;
 585                 sprom_extract_r45(out, in);
 586         } else {
 587                 switch (out->revision) {
 588                 case 1:
 589                 case 2:
 590                 case 3:
 591                         sprom_extract_r123(out, in);
 592                         break;
 593                 case 4:
 594                 case 5:
 595                         sprom_extract_r45(out, in);
 596                         break;
 597                 case 8:
 598                         sprom_extract_r8(out, in);
 599                         break;
 600                 default:
 601                         ssb_printk(KERN_WARNING PFX "Unsupported SPROM"
 602                                    "  revision %d detected. Will extract"
 603                                    " v1\n", out->revision);
 604                         out->revision = 1;
 605                         sprom_extract_r123(out, in);
 606                 }
 607         }
 608
 609         if (out->boardflags_lo == 0xFFFF)
 610                 out->boardflags_lo = 0;  /* per specs */
 611         if (out->boardflags_hi == 0xFFFF)
 612                 out->boardflags_hi = 0;  /* per specs */
 613
 614         return 0;
 615 }
 616
 617 static int ssb_pci_sprom_get(struct ssb_bus *bus,
 618                              struct ssb_sprom *sprom)
 619 {
 620         const struct ssb_sprom *fallback;
 621         int err = -ENOMEM;
 622         u16 *buf;
 623
 624         buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
 625         if (!buf)
 626                 goto out;
 627         bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
 628         sprom_do_read(bus, buf);
 629         err = sprom_check_crc(buf, bus->sprom_size);
 630         if (err) {
 631                 /* try for a 440 byte SPROM - revision 4 and higher */
 632                 kfree(buf);
 633                 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
 634                               GFP_KERNEL);
 635                 if (!buf)
 636                         goto out;
 637                 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
 638                 sprom_do_read(bus, buf);
 639                 err = sprom_check_crc(buf, bus->sprom_size);
 640                 if (err) {
 641                         /* All CRC attempts failed.
 642                          * Maybe there is no SPROM on the device?
 643                          * If we have a fallback, use that. */
 644                         fallback = ssb_get_fallback_sprom();
 645                         if (fallback) {
 646                                 memcpy(sprom, fallback, sizeof(*sprom));
 647                                 err = 0;
 648                                 goto out_free;
 649                         }
 650                         ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
 651                                    " SPROM CRC (corrupt SPROM)\n");
 652                 }
 653         }
 654         err = sprom_extract(bus, sprom, buf, bus->sprom_size);
 655
 656 out_free:
 657         kfree(buf);
 658 out:
 659         return err;
 660 }
 661
 662 static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
 663                                   struct ssb_boardinfo *bi)
 664 {
 665         pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
 666                              &bi->vendor);
 667         pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
 668                              &bi->type);
 669         pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
 670                              &bi->rev);
 671 }
 672
 673 int ssb_pci_get_invariants(struct ssb_bus *bus,
 674                            struct ssb_init_invariants *iv)
 675 {
 676         int err;
 677
 678         err = ssb_pci_sprom_get(bus, &iv->sprom);
 679         if (err)
 680                 goto out;
 681         ssb_pci_get_boardinfo(bus, &iv->boardinfo);
 682
 683 out:
 684         return err;
 685 }
 686
 687 #ifdef CONFIG_SSB_DEBUG
 688 static int ssb_pci_assert_buspower(struct ssb_bus *bus)
 689 {
 690         if (likely(bus->powered_up))
 691                 return 0;
 692
 693         printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
 694                "while accessing PCI MMIO space\n");
 695         if (bus->power_warn_count <= 10) {
 696                 bus->power_warn_count++;
 697                 dump_stack();
 698         }
 699
 700         return -ENODEV;
 701 }
 702 #else /* DEBUG */
 703 static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
 704 {
 705         return 0;
 706 }
 707 #endif /* DEBUG */
 708
 709 static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
 710 {
 711         struct ssb_bus *bus = dev->bus;
 712
 713         if (unlikely(ssb_pci_assert_buspower(bus)))
 714                 return 0xFF;
 715         if (unlikely(bus->mapped_device != dev)) {
 716                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 717                         return 0xFF;
 718         }
 719         return ioread8(bus->mmio + offset);
 720 }
 721
 722 static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
 723 {
 724         struct ssb_bus *bus = dev->bus;
 725
 726         if (unlikely(ssb_pci_assert_buspower(bus)))
 727                 return 0xFFFF;
 728         if (unlikely(bus->mapped_device != dev)) {
 729                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 730                         return 0xFFFF;
 731         }
 732         return ioread16(bus->mmio + offset);
 733 }
 734
 735 static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
 736 {
 737         struct ssb_bus *bus = dev->bus;
 738
 739         if (unlikely(ssb_pci_assert_buspower(bus)))
 740                 return 0xFFFFFFFF;
 741         if (unlikely(bus->mapped_device != dev)) {
 742                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 743                         return 0xFFFFFFFF;
 744         }
 745         return ioread32(bus->mmio + offset);
 746 }
 747
 748 #ifdef CONFIG_SSB_BLOCKIO
 749 static void ssb_pci_block_read(struct ssb_device *dev, void *buffer,
 750                                size_t count, u16 offset, u8 reg_width)
 751 {
 752         struct ssb_bus *bus = dev->bus;
 753         void __iomem *addr = bus->mmio + offset;
 754
 755         if (unlikely(ssb_pci_assert_buspower(bus)))
 756                 goto error;
 757         if (unlikely(bus->mapped_device != dev)) {
 758                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 759                         goto error;
 760         }
 761         switch (reg_width) {
 762         case sizeof(u8):
 763                 ioread8_rep(addr, buffer, count);
 764                 break;
 765         case sizeof(u16):
 766                 SSB_WARN_ON(count & 1);
 767                 ioread16_rep(addr, buffer, count >> 1);
 768                 break;
 769         case sizeof(u32):
 770                 SSB_WARN_ON(count & 3);
 771                 ioread32_rep(addr, buffer, count >> 2);
 772                 break;
 773         default:
 774                 SSB_WARN_ON(1);
 775         }
 776
 777         return;
 778 error:
 779         memset(buffer, 0xFF, count);
 780 }
 781 #endif /* CONFIG_SSB_BLOCKIO */
 782
 783 static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
 784 {
 785         struct ssb_bus *bus = dev->bus;
 786
 787         if (unlikely(ssb_pci_assert_buspower(bus)))
 788                 return;
 789         if (unlikely(bus->mapped_device != dev)) {
 790                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 791                         return;
 792         }
 793         iowrite8(value, bus->mmio + offset);
 794 }
 795
 796 static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
 797 {
 798         struct ssb_bus *bus = dev->bus;
 799
 800         if (unlikely(ssb_pci_assert_buspower(bus)))
 801                 return;
 802         if (unlikely(bus->mapped_device != dev)) {
 803                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 804                         return;
 805         }
 806         iowrite16(value, bus->mmio + offset);
 807 }
 808
 809 static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
 810 {
 811         struct ssb_bus *bus = dev->bus;
 812
 813         if (unlikely(ssb_pci_assert_buspower(bus)))
 814                 return;
 815         if (unlikely(bus->mapped_device != dev)) {
 816                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 817                         return;
 818         }
 819         iowrite32(value, bus->mmio + offset);
 820 }
 821
 822 #ifdef CONFIG_SSB_BLOCKIO
 823 static void ssb_pci_block_write(struct ssb_device *dev, const void *buffer,
 824                                 size_t count, u16 offset, u8 reg_width)
 825 {
 826         struct ssb_bus *bus = dev->bus;
 827         void __iomem *addr = bus->mmio + offset;
 828
 829         if (unlikely(ssb_pci_assert_buspower(bus)))
 830                 return;
 831         if (unlikely(bus->mapped_device != dev)) {
 832                 if (unlikely(ssb_pci_switch_core(bus, dev)))
 833                         return;
 834         }
 835         switch (reg_width) {
 836         case sizeof(u8):
 837                 iowrite8_rep(addr, buffer, count);
 838                 break;
 839         case sizeof(u16):
 840                 SSB_WARN_ON(count & 1);
 841                 iowrite16_rep(addr, buffer, count >> 1);
 842                 break;
 843         case sizeof(u32):
 844                 SSB_WARN_ON(count & 3);
 845                 iowrite32_rep(addr, buffer, count >> 2);
 846                 break;
 847         default:
 848                 SSB_WARN_ON(1);
 849         }
 850 }
 851 #endif /* CONFIG_SSB_BLOCKIO */
 852
 853 /* Not "static", as it's used in main.c */
 854 const struct ssb_bus_ops ssb_pci_ops = {
 855         .read8          = ssb_pci_read8,
 856         .read16         = ssb_pci_read16,
 857         .read32         = ssb_pci_read32,
 858         .write8         = ssb_pci_write8,
 859         .write16        = ssb_pci_write16,
 860         .write32        = ssb_pci_write32,
 861 #ifdef CONFIG_SSB_BLOCKIO
 862         .block_read     = ssb_pci_block_read,
 863         .block_write    = ssb_pci_block_write,
 864 #endif
 865 };
 866
 867 static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
 868                                        struct device_attribute *attr,
 869                                        char *buf)
 870 {
 871         struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
 872         struct ssb_bus *bus;
 873
 874         bus = ssb_pci_dev_to_bus(pdev);
 875         if (!bus)
 876                 return -ENODEV;
 877
 878         return ssb_attr_sprom_show(bus, buf, sprom_do_read);
 879 }
 880
 881 static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
 882                                         struct device_attribute *attr,
 883                                         const char *buf, size_t count)
 884 {
 885         struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
 886         struct ssb_bus *bus;
 887
 888         bus = ssb_pci_dev_to_bus(pdev);
 889         if (!bus)
 890                 return -ENODEV;
 891
 892         return ssb_attr_sprom_store(bus, buf, count,
 893                                     sprom_check_crc, sprom_do_write);
 894 }
 895
 896 static DEVICE_ATTR(ssb_sprom, 0600,
 897                    ssb_pci_attr_sprom_show,
 898                    ssb_pci_attr_sprom_store);
 899
 900 void ssb_pci_exit(struct ssb_bus *bus)
 901 {
 902         struct pci_dev *pdev;
 903
 904         if (bus->bustype != SSB_BUSTYPE_PCI)
 905                 return;
 906
 907         pdev = bus->host_pci;
 908         device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
 909 }
 910
 911 int ssb_pci_init(struct ssb_bus *bus)
 912 {
 913         struct pci_dev *pdev;
 914         int err;
 915
 916         if (bus->bustype != SSB_BUSTYPE_PCI)
 917                 return 0;
 918
 919         pdev = bus->host_pci;
 920         mutex_init(&bus->sprom_mutex);
 921         err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
 922         if (err)
 923                 goto out;
 924
 925 out:
 926         return err;
 927 }