2 * Sonics Silicon Backplane PCI-Hostbus related functions.
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>
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.
15 * Licensed under the GNU/GPL. See COPYING for details.
18 #include <linux/ssb/ssb.h>
19 #include <linux/ssb/ssb_regs.h>
20 #include <linux/pci.h>
21 #include <linux/delay.h>
23 #include "ssb_private.h"
26 /* Define the following to 1 to enable a printk on each coreswitch. */
27 #define SSB_VERBOSE_PCICORESWITCH_DEBUG 0
30 /* Lowlevel coreswitching */
31 int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
38 err = pci_write_config_dword(bus->host_pci, SSB_BAR0_WIN,
39 (coreidx * SSB_CORE_SIZE)
43 err = pci_read_config_dword(bus->host_pci, SSB_BAR0_WIN,
47 cur_core = (cur_core - SSB_ENUM_BASE)
49 if (cur_core == coreidx)
52 if (attempts++ > SSB_BAR0_MAX_RETRIES)
58 ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
62 int ssb_pci_switch_core(struct ssb_bus *bus,
63 struct ssb_device *dev)
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),
75 spin_lock_irqsave(&bus->bar_lock, flags);
76 err = ssb_pci_switch_coreidx(bus, dev->core_index);
78 bus->mapped_device = dev;
79 spin_unlock_irqrestore(&bus->bar_lock, flags);
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)
88 u32 in, out, outenable;
91 if (bus->bustype != SSB_BUSTYPE_PCI)
94 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_IN, &in);
97 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT, &out);
100 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, &outenable);
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.
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)
117 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
120 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE,
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);
136 err = pci_read_config_word(bus->host_pci, PCI_STATUS, &pci_status);
139 pci_status &= ~PCI_STATUS_SIG_TARGET_ABORT;
140 err = pci_write_config_word(bus->host_pci, PCI_STATUS, pci_status);
144 if (what & SSB_GPIO_XTAL) {
145 /* Turn the crystal off */
146 out &= ~SSB_GPIO_XTAL;
148 if (what & SSB_GPIO_PLL) {
149 /* Turn the PLL off */
152 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
155 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, outenable);
164 printk(KERN_ERR PFX "Error: ssb_pci_xtal() could not access PCI config space!\n");
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))
175 static inline u8 ssb_crc8(u8 crc, u8 data)
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,
212 return t[crc ^ data];
215 static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
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);
224 crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
230 static int sprom_check_crc(const u16 *sprom, size_t size)
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)
245 static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
249 for (i = 0; i < bus->sprom_size; i++)
250 sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
255 static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
257 struct pci_dev *pdev = bus->host_pci;
260 u16 size = bus->sprom_size;
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);
266 spromctl |= SSB_SPROMCTL_WE;
267 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
270 ssb_printk(KERN_NOTICE PFX "[ 0%%");
272 for (i = 0; i < size; i++) {
275 else if (i == size / 2)
277 else if (i == (size * 3) / 4)
281 writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
285 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
288 spromctl &= ~SSB_SPROMCTL_WE;
289 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
293 ssb_printk("100%% ]\n");
294 ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
298 ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
302 static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
308 v = in[SPOFF(SSB_SPROM1_AGAIN)];
309 gain = (v & mask) >> shift;
311 gain = 2; /* If unset use 2dBm */
312 if (sprom_revision == 1) {
313 /* Convert to Q5.2 */
316 /* Q5.2 Fractional part is stored in 0xC0 */
317 gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
323 static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
330 if (out->revision == 3) /* rev 3 moved MAC */
331 loc[0] = SSB_SPROM3_IL0MAC;
333 loc[0] = SSB_SPROM1_IL0MAC;
334 loc[1] = SSB_SPROM1_ET0MAC;
335 loc[2] = SSB_SPROM1_ET1MAC;
337 for (i = 0; i < 3; i++) {
338 v = in[SPOFF(loc[0]) + i];
339 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
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);
346 for (i = 0; i < 3; i++) {
347 v = in[SPOFF(loc[2]) + i];
348 *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
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);
385 /* Extract the antenna gain values. */
386 gain = r123_extract_antgain(out->revision, in,
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,
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;
402 static void sprom_extract_r45(struct ssb_sprom *out, const u16 *in)
408 if (out->revision == 4)
409 il0mac_offset = SSB_SPROM4_IL0MAC;
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);
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);
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);
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);
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);
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));
467 /* TODO - get remaining rev 4 stuff needed */
470 static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
471 const u16 *in, u16 size)
473 memset(out, 0, sizeof(*out));
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. */
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 */
488 sprom_extract_r45(out, in);
490 if (out->revision == 0)
492 if (out->revision >= 1 && out->revision <= 3) {
493 sprom_extract_r123(out, in);
495 if (out->revision == 4 || out->revision == 5)
496 sprom_extract_r45(out, in);
497 if (out->revision > 5)
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 */
508 ssb_printk(KERN_WARNING PFX "Unsupported SPROM revision %d "
509 "detected. Will extract v1\n", out->revision);
510 sprom_extract_r123(out, in);
514 static int ssb_pci_sprom_get(struct ssb_bus *bus,
515 struct ssb_sprom *sprom)
520 buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
523 bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
524 sprom_do_read(bus, buf);
525 err = sprom_check_crc(buf, bus->sprom_size);
527 /* try for a 440 byte SPROM - revision 4 and higher */
529 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
533 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
534 sprom_do_read(bus, buf);
535 err = sprom_check_crc(buf, bus->sprom_size);
537 ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
538 " SPROM CRC (corrupt SPROM)\n");
540 err = sprom_extract(bus, sprom, buf, bus->sprom_size);
547 static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
548 struct ssb_boardinfo *bi)
550 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
552 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
554 pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
558 int ssb_pci_get_invariants(struct ssb_bus *bus,
559 struct ssb_init_invariants *iv)
563 err = ssb_pci_sprom_get(bus, &iv->sprom);
566 ssb_pci_get_boardinfo(bus, &iv->boardinfo);
572 #ifdef CONFIG_SSB_DEBUG
573 static int ssb_pci_assert_buspower(struct ssb_bus *bus)
575 if (likely(bus->powered_up))
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++;
588 static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
594 static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
596 struct ssb_bus *bus = dev->bus;
598 if (unlikely(ssb_pci_assert_buspower(bus)))
600 if (unlikely(bus->mapped_device != dev)) {
601 if (unlikely(ssb_pci_switch_core(bus, dev)))
604 return ioread8(bus->mmio + offset);
607 static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
609 struct ssb_bus *bus = dev->bus;
611 if (unlikely(ssb_pci_assert_buspower(bus)))
613 if (unlikely(bus->mapped_device != dev)) {
614 if (unlikely(ssb_pci_switch_core(bus, dev)))
617 return ioread16(bus->mmio + offset);
620 static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
622 struct ssb_bus *bus = dev->bus;
624 if (unlikely(ssb_pci_assert_buspower(bus)))
626 if (unlikely(bus->mapped_device != dev)) {
627 if (unlikely(ssb_pci_switch_core(bus, dev)))
630 return ioread32(bus->mmio + offset);
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)
637 struct ssb_bus *bus = dev->bus;
638 void __iomem *addr = bus->mmio + offset;
640 if (unlikely(ssb_pci_assert_buspower(bus)))
642 if (unlikely(bus->mapped_device != dev)) {
643 if (unlikely(ssb_pci_switch_core(bus, dev)))
648 ioread8_rep(addr, buffer, count);
651 SSB_WARN_ON(count & 1);
652 ioread16_rep(addr, buffer, count >> 1);
655 SSB_WARN_ON(count & 3);
656 ioread32_rep(addr, buffer, count >> 2);
664 memset(buffer, 0xFF, count);
666 #endif /* CONFIG_SSB_BLOCKIO */
668 static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
670 struct ssb_bus *bus = dev->bus;
672 if (unlikely(ssb_pci_assert_buspower(bus)))
674 if (unlikely(bus->mapped_device != dev)) {
675 if (unlikely(ssb_pci_switch_core(bus, dev)))
678 iowrite8(value, bus->mmio + offset);
681 static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
683 struct ssb_bus *bus = dev->bus;
685 if (unlikely(ssb_pci_assert_buspower(bus)))
687 if (unlikely(bus->mapped_device != dev)) {
688 if (unlikely(ssb_pci_switch_core(bus, dev)))
691 iowrite16(value, bus->mmio + offset);
694 static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
696 struct ssb_bus *bus = dev->bus;
698 if (unlikely(ssb_pci_assert_buspower(bus)))
700 if (unlikely(bus->mapped_device != dev)) {
701 if (unlikely(ssb_pci_switch_core(bus, dev)))
704 iowrite32(value, bus->mmio + offset);
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)
711 struct ssb_bus *bus = dev->bus;
712 void __iomem *addr = bus->mmio + offset;
714 if (unlikely(ssb_pci_assert_buspower(bus)))
716 if (unlikely(bus->mapped_device != dev)) {
717 if (unlikely(ssb_pci_switch_core(bus, dev)))
722 iowrite8_rep(addr, buffer, count);
725 SSB_WARN_ON(count & 1);
726 iowrite16_rep(addr, buffer, count >> 1);
729 SSB_WARN_ON(count & 3);
730 iowrite32_rep(addr, buffer, count >> 2);
736 #endif /* CONFIG_SSB_BLOCKIO */
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,
752 static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
753 struct device_attribute *attr,
756 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
759 bus = ssb_pci_dev_to_bus(pdev);
763 return ssb_attr_sprom_show(bus, buf, sprom_do_read);
766 static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
767 struct device_attribute *attr,
768 const char *buf, size_t count)
770 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
773 bus = ssb_pci_dev_to_bus(pdev);
777 return ssb_attr_sprom_store(bus, buf, count,
778 sprom_check_crc, sprom_do_write);
781 static DEVICE_ATTR(ssb_sprom, 0600,
782 ssb_pci_attr_sprom_show,
783 ssb_pci_attr_sprom_store);
785 void ssb_pci_exit(struct ssb_bus *bus)
787 struct pci_dev *pdev;
789 if (bus->bustype != SSB_BUSTYPE_PCI)
792 pdev = bus->host_pci;
793 device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
796 int ssb_pci_init(struct ssb_bus *bus)
798 struct pci_dev *pdev;
801 if (bus->bustype != SSB_BUSTYPE_PCI)
804 pdev = bus->host_pci;
805 mutex_init(&bus->sprom_mutex);
806 err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);