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 } 813