pci.c revision e79c1ba84c68de9161d541bd2bcc8ea65c89955c
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 */ 31int 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; 57error: 58 ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx); 59 return -ENODEV; 60} 61 62int 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. */ 85int 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 160out: 161 return err; 162 163err_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 175static 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 215static 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 230static 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 245static 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 255static 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; 297err_ctlreg: 298 ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n"); 299 return err; 300} 301 302static 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 323static 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 402static 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 470static void sprom_extract_r8(struct ssb_sprom *out, const u16 *in) 471{ 472 int i; 473 u16 v; 474 475 /* extract the MAC address */ 476 for (i = 0; i < 3; i++) { 477 v = in[SPOFF(SSB_SPROM1_IL0MAC) + i]; 478 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v); 479 } 480 SPEX(country_code, SSB_SPROM8_CCODE, 0xFFFF, 0); 481 SPEX(boardflags_lo, SSB_SPROM8_BFLLO, 0xFFFF, 0); 482 SPEX(boardflags_hi, SSB_SPROM8_BFLHI, 0xFFFF, 0); 483 SPEX(ant_available_a, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_A, 484 SSB_SPROM8_ANTAVAIL_A_SHIFT); 485 SPEX(ant_available_bg, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_BG, 486 SSB_SPROM8_ANTAVAIL_BG_SHIFT); 487 SPEX(maxpwr_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_MAXP_BG_MASK, 0); 488 SPEX(itssi_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_ITSSI_BG, 489 SSB_SPROM8_ITSSI_BG_SHIFT); 490 SPEX(maxpwr_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_MAXP_A_MASK, 0); 491 SPEX(itssi_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_ITSSI_A, 492 SSB_SPROM8_ITSSI_A_SHIFT); 493 SPEX(gpio0, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P0, 0); 494 SPEX(gpio1, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P1, 495 SSB_SPROM8_GPIOA_P1_SHIFT); 496 SPEX(gpio2, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P2, 0); 497 SPEX(gpio3, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P3, 498 SSB_SPROM8_GPIOB_P3_SHIFT); 499 500 /* Extract the antenna gain values. */ 501 SPEX(antenna_gain.ghz24.a0, SSB_SPROM8_AGAIN01, 502 SSB_SPROM8_AGAIN0, SSB_SPROM8_AGAIN0_SHIFT); 503 SPEX(antenna_gain.ghz24.a1, SSB_SPROM8_AGAIN01, 504 SSB_SPROM8_AGAIN1, SSB_SPROM8_AGAIN1_SHIFT); 505 SPEX(antenna_gain.ghz24.a2, SSB_SPROM8_AGAIN23, 506 SSB_SPROM8_AGAIN2, SSB_SPROM8_AGAIN2_SHIFT); 507 SPEX(antenna_gain.ghz24.a3, SSB_SPROM8_AGAIN23, 508 SSB_SPROM8_AGAIN3, SSB_SPROM8_AGAIN3_SHIFT); 509 memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24, 510 sizeof(out->antenna_gain.ghz5)); 511 512 /* TODO - get remaining rev 8 stuff needed */ 513} 514 515static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out, 516 const u16 *in, u16 size) 517{ 518 memset(out, 0, sizeof(*out)); 519 520 out->revision = in[size - 1] & 0x00FF; 521 ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision); 522 memset(out->et0mac, 0xFF, 6); /* preset et0 and et1 mac */ 523 memset(out->et1mac, 0xFF, 6); 524 if ((bus->chip_id & 0xFF00) == 0x4400) { 525 /* Workaround: The BCM44XX chip has a stupid revision 526 * number stored in the SPROM. 527 * Always extract r1. */ 528 out->revision = 1; 529 sprom_extract_r123(out, in); 530 } else if (bus->chip_id == 0x4321) { 531 /* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */ 532 out->revision = 4; 533 sprom_extract_r45(out, in); 534 } else { 535 switch (out->revision) { 536 case 1: 537 case 2: 538 case 3: 539 sprom_extract_r123(out, in); 540 break; 541 case 4: 542 case 5: 543 sprom_extract_r45(out, in); 544 break; 545 case 8: 546 sprom_extract_r8(out, in); 547 break; 548 default: 549 ssb_printk(KERN_WARNING PFX "Unsupported SPROM" 550 " revision %d detected. Will extract" 551 " v1\n", out->revision); 552 sprom_extract_r123(out, in); 553 } 554 } 555 556 if (out->boardflags_lo == 0xFFFF) 557 out->boardflags_lo = 0; /* per specs */ 558 if (out->boardflags_hi == 0xFFFF) 559 out->boardflags_hi = 0; /* per specs */ 560 561 return 0; 562} 563 564static int ssb_pci_sprom_get(struct ssb_bus *bus, 565 struct ssb_sprom *sprom) 566{ 567 const struct ssb_sprom *fallback; 568 int err = -ENOMEM; 569 u16 *buf; 570 571 buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL); 572 if (!buf) 573 goto out; 574 bus->sprom_size = SSB_SPROMSIZE_WORDS_R123; 575 sprom_do_read(bus, buf); 576 err = sprom_check_crc(buf, bus->sprom_size); 577 if (err) { 578 /* try for a 440 byte SPROM - revision 4 and higher */ 579 kfree(buf); 580 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16), 581 GFP_KERNEL); 582 if (!buf) 583 goto out; 584 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4; 585 sprom_do_read(bus, buf); 586 err = sprom_check_crc(buf, bus->sprom_size); 587 if (err) { 588 /* All CRC attempts failed. 589 * Maybe there is no SPROM on the device? 590 * If we have a fallback, use that. */ 591 fallback = ssb_get_fallback_sprom(); 592 if (fallback) { 593 memcpy(sprom, fallback, sizeof(*sprom)); 594 err = 0; 595 goto out_free; 596 } 597 ssb_printk(KERN_WARNING PFX "WARNING: Invalid" 598 " SPROM CRC (corrupt SPROM)\n"); 599 } 600 } 601 err = sprom_extract(bus, sprom, buf, bus->sprom_size); 602 603out_free: 604 kfree(buf); 605out: 606 return err; 607} 608 609static void ssb_pci_get_boardinfo(struct ssb_bus *bus, 610 struct ssb_boardinfo *bi) 611{ 612 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID, 613 &bi->vendor); 614 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID, 615 &bi->type); 616 pci_read_config_word(bus->host_pci, PCI_REVISION_ID, 617 &bi->rev); 618} 619 620int ssb_pci_get_invariants(struct ssb_bus *bus, 621 struct ssb_init_invariants *iv) 622{ 623 int err; 624 625 err = ssb_pci_sprom_get(bus, &iv->sprom); 626 if (err) 627 goto out; 628 ssb_pci_get_boardinfo(bus, &iv->boardinfo); 629 630out: 631 return err; 632} 633 634#ifdef CONFIG_SSB_DEBUG 635static int ssb_pci_assert_buspower(struct ssb_bus *bus) 636{ 637 if (likely(bus->powered_up)) 638 return 0; 639 640 printk(KERN_ERR PFX "FATAL ERROR: Bus powered down " 641 "while accessing PCI MMIO space\n"); 642 if (bus->power_warn_count <= 10) { 643 bus->power_warn_count++; 644 dump_stack(); 645 } 646 647 return -ENODEV; 648} 649#else /* DEBUG */ 650static inline int ssb_pci_assert_buspower(struct ssb_bus *bus) 651{ 652 return 0; 653} 654#endif /* DEBUG */ 655 656static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset) 657{ 658 struct ssb_bus *bus = dev->bus; 659 660 if (unlikely(ssb_pci_assert_buspower(bus))) 661 return 0xFF; 662 if (unlikely(bus->mapped_device != dev)) { 663 if (unlikely(ssb_pci_switch_core(bus, dev))) 664 return 0xFF; 665 } 666 return ioread8(bus->mmio + offset); 667} 668 669static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset) 670{ 671 struct ssb_bus *bus = dev->bus; 672 673 if (unlikely(ssb_pci_assert_buspower(bus))) 674 return 0xFFFF; 675 if (unlikely(bus->mapped_device != dev)) { 676 if (unlikely(ssb_pci_switch_core(bus, dev))) 677 return 0xFFFF; 678 } 679 return ioread16(bus->mmio + offset); 680} 681 682static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset) 683{ 684 struct ssb_bus *bus = dev->bus; 685 686 if (unlikely(ssb_pci_assert_buspower(bus))) 687 return 0xFFFFFFFF; 688 if (unlikely(bus->mapped_device != dev)) { 689 if (unlikely(ssb_pci_switch_core(bus, dev))) 690 return 0xFFFFFFFF; 691 } 692 return ioread32(bus->mmio + offset); 693} 694 695#ifdef CONFIG_SSB_BLOCKIO 696static void ssb_pci_block_read(struct ssb_device *dev, void *buffer, 697 size_t count, u16 offset, u8 reg_width) 698{ 699 struct ssb_bus *bus = dev->bus; 700 void __iomem *addr = bus->mmio + offset; 701 702 if (unlikely(ssb_pci_assert_buspower(bus))) 703 goto error; 704 if (unlikely(bus->mapped_device != dev)) { 705 if (unlikely(ssb_pci_switch_core(bus, dev))) 706 goto error; 707 } 708 switch (reg_width) { 709 case sizeof(u8): 710 ioread8_rep(addr, buffer, count); 711 break; 712 case sizeof(u16): 713 SSB_WARN_ON(count & 1); 714 ioread16_rep(addr, buffer, count >> 1); 715 break; 716 case sizeof(u32): 717 SSB_WARN_ON(count & 3); 718 ioread32_rep(addr, buffer, count >> 2); 719 break; 720 default: 721 SSB_WARN_ON(1); 722 } 723 724 return; 725error: 726 memset(buffer, 0xFF, count); 727} 728#endif /* CONFIG_SSB_BLOCKIO */ 729 730static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value) 731{ 732 struct ssb_bus *bus = dev->bus; 733 734 if (unlikely(ssb_pci_assert_buspower(bus))) 735 return; 736 if (unlikely(bus->mapped_device != dev)) { 737 if (unlikely(ssb_pci_switch_core(bus, dev))) 738 return; 739 } 740 iowrite8(value, bus->mmio + offset); 741} 742 743static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value) 744{ 745 struct ssb_bus *bus = dev->bus; 746 747 if (unlikely(ssb_pci_assert_buspower(bus))) 748 return; 749 if (unlikely(bus->mapped_device != dev)) { 750 if (unlikely(ssb_pci_switch_core(bus, dev))) 751 return; 752 } 753 iowrite16(value, bus->mmio + offset); 754} 755 756static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value) 757{ 758 struct ssb_bus *bus = dev->bus; 759 760 if (unlikely(ssb_pci_assert_buspower(bus))) 761 return; 762 if (unlikely(bus->mapped_device != dev)) { 763 if (unlikely(ssb_pci_switch_core(bus, dev))) 764 return; 765 } 766 iowrite32(value, bus->mmio + offset); 767} 768 769#ifdef CONFIG_SSB_BLOCKIO 770static void ssb_pci_block_write(struct ssb_device *dev, const void *buffer, 771 size_t count, u16 offset, u8 reg_width) 772{ 773 struct ssb_bus *bus = dev->bus; 774 void __iomem *addr = bus->mmio + offset; 775 776 if (unlikely(ssb_pci_assert_buspower(bus))) 777 return; 778 if (unlikely(bus->mapped_device != dev)) { 779 if (unlikely(ssb_pci_switch_core(bus, dev))) 780 return; 781 } 782 switch (reg_width) { 783 case sizeof(u8): 784 iowrite8_rep(addr, buffer, count); 785 break; 786 case sizeof(u16): 787 SSB_WARN_ON(count & 1); 788 iowrite16_rep(addr, buffer, count >> 1); 789 break; 790 case sizeof(u32): 791 SSB_WARN_ON(count & 3); 792 iowrite32_rep(addr, buffer, count >> 2); 793 break; 794 default: 795 SSB_WARN_ON(1); 796 } 797} 798#endif /* CONFIG_SSB_BLOCKIO */ 799 800/* Not "static", as it's used in main.c */ 801const struct ssb_bus_ops ssb_pci_ops = { 802 .read8 = ssb_pci_read8, 803 .read16 = ssb_pci_read16, 804 .read32 = ssb_pci_read32, 805 .write8 = ssb_pci_write8, 806 .write16 = ssb_pci_write16, 807 .write32 = ssb_pci_write32, 808#ifdef CONFIG_SSB_BLOCKIO 809 .block_read = ssb_pci_block_read, 810 .block_write = ssb_pci_block_write, 811#endif 812}; 813 814static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev, 815 struct device_attribute *attr, 816 char *buf) 817{ 818 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev); 819 struct ssb_bus *bus; 820 821 bus = ssb_pci_dev_to_bus(pdev); 822 if (!bus) 823 return -ENODEV; 824 825 return ssb_attr_sprom_show(bus, buf, sprom_do_read); 826} 827 828static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev, 829 struct device_attribute *attr, 830 const char *buf, size_t count) 831{ 832 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev); 833 struct ssb_bus *bus; 834 835 bus = ssb_pci_dev_to_bus(pdev); 836 if (!bus) 837 return -ENODEV; 838 839 return ssb_attr_sprom_store(bus, buf, count, 840 sprom_check_crc, sprom_do_write); 841} 842 843static DEVICE_ATTR(ssb_sprom, 0600, 844 ssb_pci_attr_sprom_show, 845 ssb_pci_attr_sprom_store); 846 847void ssb_pci_exit(struct ssb_bus *bus) 848{ 849 struct pci_dev *pdev; 850 851 if (bus->bustype != SSB_BUSTYPE_PCI) 852 return; 853 854 pdev = bus->host_pci; 855 device_remove_file(&pdev->dev, &dev_attr_ssb_sprom); 856} 857 858int ssb_pci_init(struct ssb_bus *bus) 859{ 860 struct pci_dev *pdev; 861 int err; 862 863 if (bus->bustype != SSB_BUSTYPE_PCI) 864 return 0; 865 866 pdev = bus->host_pci; 867 mutex_init(&bus->sprom_mutex); 868 err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom); 869 if (err) 870 goto out; 871 872out: 873 return err; 874} 875