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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / ssb / pci.c
blob9e50896233aa969e5fa145bcf630dd0ba9055363
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 SPEX16(_outvar, _offset, _mask, _shift) \
173 out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
174 #define SPEX32(_outvar, _offset, _mask, _shift) \
175 out->_outvar = ((((u32)in[SPOFF((_offset)+2)] << 16 | \
176 in[SPOFF(_offset)]) & (_mask)) >> (_shift))
177 #define SPEX(_outvar, _offset, _mask, _shift) \
178 SPEX16(_outvar, _offset, _mask, _shift)
179
180
181 static inline u8 ssb_crc8(u8 crc, u8 data)
182 {
183 /* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */
184 static const u8 t[] = {
185 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
186 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
187 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
188 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
189 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
190 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
191 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
192 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
193 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
194 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
195 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
196 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
197 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
198 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
199 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
200 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
201 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
202 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
203 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
204 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
205 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
206 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
207 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
208 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
209 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
210 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
211 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
212 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
213 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
214 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
215 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
216 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
217 };
218 return t[crc ^ data];
219 }
220
221 static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
222 {
223 int word;
224 u8 crc = 0xFF;
225
226 for (word = 0; word < size - 1; word++) {
227 crc = ssb_crc8(crc, sprom[word] & 0x00FF);
228 crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
229 }
230 crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
231 crc ^= 0xFF;
232
233 return crc;
234 }
235
236 static int sprom_check_crc(const u16 *sprom, size_t size)
237 {
238 u8 crc;
239 u8 expected_crc;
240 u16 tmp;
241
242 crc = ssb_sprom_crc(sprom, size);
243 tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
244 expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
245 if (crc != expected_crc)
246 return -EPROTO;
247
248 return 0;
249 }
250
251 static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
252 {
253 int i;
254
255 for (i = 0; i < bus->sprom_size; i++)
256 sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
257
258 return 0;
259 }
260
261 static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
262 {
263 struct pci_dev *pdev = bus->host_pci;
264 int i, err;
265 u32 spromctl;
266 u16 size = bus->sprom_size;
267
268 ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
269 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
270 if (err)
271 goto err_ctlreg;
272 spromctl |= SSB_SPROMCTL_WE;
273 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
274 if (err)
275 goto err_ctlreg;
276 ssb_printk(KERN_NOTICE PFX "[ 0%%");
277 msleep(500);
278 for (i = 0; i < size; i++) {
279 if (i == size / 4)
280 ssb_printk("25%%");
281 else if (i == size / 2)
282 ssb_printk("50%%");
283 else if (i == (size * 3) / 4)
284 ssb_printk("75%%");
285 else if (i % 2)
286 ssb_printk(".");
287 writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
288 mmiowb();
289 msleep(20);
290 }
291 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
292 if (err)
293 goto err_ctlreg;
294 spromctl &= ~SSB_SPROMCTL_WE;
295 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
296 if (err)
297 goto err_ctlreg;
298 msleep(500);
299 ssb_printk("100%% ]\n");
300 ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
301
302 return 0;
303 err_ctlreg:
304 ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
305 return err;
306 }
307
308 static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
309 u16 mask, u16 shift)
310 {
311 u16 v;
312 u8 gain;
313
314 v = in[SPOFF(SSB_SPROM1_AGAIN)];
315 gain = (v & mask) >> shift;
316 if (gain == 0xFF)
317 gain = 2; /* If unset use 2dBm */
318 if (sprom_revision == 1) {
319 /* Convert to Q5.2 */
320 gain <<= 2;
321 } else {
322 /* Q5.2 Fractional part is stored in 0xC0 */
323 gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
324 }
325
326 return (s8)gain;
327 }
328
329 static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
330 {
331 int i;
332 u16 v;
333 s8 gain;
334 u16 loc[3];
335
336 if (out->revision == 3) /* rev 3 moved MAC */
337 loc[0] = SSB_SPROM3_IL0MAC;
338 else {
339 loc[0] = SSB_SPROM1_IL0MAC;
340 loc[1] = SSB_SPROM1_ET0MAC;
341 loc[2] = SSB_SPROM1_ET1MAC;
342 }
343 for (i = 0; i < 3; i++) {
344 v = in[SPOFF(loc[0]) + i];
345 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
346 }
347 if (out->revision < 3) { /* only rev 1-2 have et0, et1 */
348 for (i = 0; i < 3; i++) {
349 v = in[SPOFF(loc[1]) + i];
350 *(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
351 }
352 for (i = 0; i < 3; i++) {
353 v = in[SPOFF(loc[2]) + i];
354 *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
355 }
356 }
357 SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
358 SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
359 SSB_SPROM1_ETHPHY_ET1A_SHIFT);
360 SPEX(et0mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0M, 14);
361 SPEX(et1mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1M, 15);
362 SPEX(board_rev, SSB_SPROM1_BINF, SSB_SPROM1_BINF_BREV, 0);
363 SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
364 SSB_SPROM1_BINF_CCODE_SHIFT);
365 SPEX(ant_available_a, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTA,
366 SSB_SPROM1_BINF_ANTA_SHIFT);
367 SPEX(ant_available_bg, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTBG,
368 SSB_SPROM1_BINF_ANTBG_SHIFT);
369 SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
370 SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
371 SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
372 SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
373 SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
374 SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
375 SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
376 SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
377 SSB_SPROM1_GPIOA_P1_SHIFT);
378 SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
379 SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
380 SSB_SPROM1_GPIOB_P3_SHIFT);
381 SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
382 SSB_SPROM1_MAXPWR_A_SHIFT);
383 SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
384 SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
385 SSB_SPROM1_ITSSI_A_SHIFT);
386 SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
387 SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
388 if (out->revision >= 2)
389 SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
390
391 /* Extract the antenna gain values. */
392 gain = r123_extract_antgain(out->revision, in,
393 SSB_SPROM1_AGAIN_BG,
394 SSB_SPROM1_AGAIN_BG_SHIFT);
395 out->antenna_gain.ghz24.a0 = gain;
396 out->antenna_gain.ghz24.a1 = gain;
397 out->antenna_gain.ghz24.a2 = gain;
398 out->antenna_gain.ghz24.a3 = gain;
399 gain = r123_extract_antgain(out->revision, in,
400 SSB_SPROM1_AGAIN_A,
401 SSB_SPROM1_AGAIN_A_SHIFT);
402 out->antenna_gain.ghz5.a0 = gain;
403 out->antenna_gain.ghz5.a1 = gain;
404 out->antenna_gain.ghz5.a2 = gain;
405 out->antenna_gain.ghz5.a3 = gain;
406 }
407
408 static void sprom_extract_r45(struct ssb_sprom *out, const u16 *in)
409 {
410 int i;
411 u16 v;
412 u16 il0mac_offset;
413
414 if (out->revision == 4)
415 il0mac_offset = SSB_SPROM4_IL0MAC;
416 else
417 il0mac_offset = SSB_SPROM5_IL0MAC;
418 /* extract the MAC address */
419 for (i = 0; i < 3; i++) {
420 v = in[SPOFF(il0mac_offset) + i];
421 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
422 }
423 SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
424 SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
425 SSB_SPROM4_ETHPHY_ET1A_SHIFT);
426 if (out->revision == 4) {
427 SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
428 SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
429 SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
430 } else {
431 SPEX(country_code, SSB_SPROM5_CCODE, 0xFFFF, 0);
432 SPEX(boardflags_lo, SSB_SPROM5_BFLLO, 0xFFFF, 0);
433 SPEX(boardflags_hi, SSB_SPROM5_BFLHI, 0xFFFF, 0);
434 }
435 SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
436 SSB_SPROM4_ANTAVAIL_A_SHIFT);
437 SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
438 SSB_SPROM4_ANTAVAIL_BG_SHIFT);
439 SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
440 SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
441 SSB_SPROM4_ITSSI_BG_SHIFT);
442 SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
443 SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
444 SSB_SPROM4_ITSSI_A_SHIFT);
445 if (out->revision == 4) {
446 SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
447 SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
448 SSB_SPROM4_GPIOA_P1_SHIFT);
449 SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
450 SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
451 SSB_SPROM4_GPIOB_P3_SHIFT);
452 } else {
453 SPEX(gpio0, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P0, 0);
454 SPEX(gpio1, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P1,
455 SSB_SPROM5_GPIOA_P1_SHIFT);
456 SPEX(gpio2, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P2, 0);
457 SPEX(gpio3, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P3,
458 SSB_SPROM5_GPIOB_P3_SHIFT);
459 }
460
461 /* Extract the antenna gain values. */
462 SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
463 SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
464 SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
465 SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
466 SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
467 SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
468 SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
469 SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
470 memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
471 sizeof(out->antenna_gain.ghz5));
472
473 /* TODO - get remaining rev 4 stuff needed */
474 }
475
476 static void sprom_extract_r8(struct ssb_sprom *out, const u16 *in)
477 {
478 int i;
479 u16 v;
480
481 /* extract the MAC address */
482 for (i = 0; i < 3; i++) {
483 v = in[SPOFF(SSB_SPROM8_IL0MAC) + i];
484 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
485 }
486 SPEX(country_code, SSB_SPROM8_CCODE, 0xFFFF, 0);
487 SPEX(boardflags_lo, SSB_SPROM8_BFLLO, 0xFFFF, 0);
488 SPEX(boardflags_hi, SSB_SPROM8_BFLHI, 0xFFFF, 0);
489 SPEX(boardflags2_lo, SSB_SPROM8_BFL2LO, 0xFFFF, 0);
490 SPEX(boardflags2_hi, SSB_SPROM8_BFL2HI, 0xFFFF, 0);
491 SPEX(ant_available_a, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_A,
492 SSB_SPROM8_ANTAVAIL_A_SHIFT);
493 SPEX(ant_available_bg, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_BG,
494 SSB_SPROM8_ANTAVAIL_BG_SHIFT);
495 SPEX(maxpwr_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_MAXP_BG_MASK, 0);
496 SPEX(itssi_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_ITSSI_BG,
497 SSB_SPROM8_ITSSI_BG_SHIFT);
498 SPEX(maxpwr_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_MAXP_A_MASK, 0);
499 SPEX(itssi_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_ITSSI_A,
500 SSB_SPROM8_ITSSI_A_SHIFT);
501 SPEX(maxpwr_ah, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AH_MASK, 0);
502 SPEX(maxpwr_al, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AL_MASK,
503 SSB_SPROM8_MAXP_AL_SHIFT);
504 SPEX(gpio0, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P0, 0);
505 SPEX(gpio1, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P1,
506 SSB_SPROM8_GPIOA_P1_SHIFT);
507 SPEX(gpio2, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P2, 0);
508 SPEX(gpio3, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P3,
509 SSB_SPROM8_GPIOB_P3_SHIFT);
510 SPEX(tri2g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI2G, 0);
511 SPEX(tri5g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI5G,
512 SSB_SPROM8_TRI5G_SHIFT);
513 SPEX(tri5gl, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GL, 0);
514 SPEX(tri5gh, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GH,
515 SSB_SPROM8_TRI5GH_SHIFT);
516 SPEX(rxpo2g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO2G, 0);
517 SPEX(rxpo5g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO5G,
518 SSB_SPROM8_RXPO5G_SHIFT);
519 SPEX(rssismf2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMF2G, 0);
520 SPEX(rssismc2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMC2G,
521 SSB_SPROM8_RSSISMC2G_SHIFT);
522 SPEX(rssisav2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISAV2G,
523 SSB_SPROM8_RSSISAV2G_SHIFT);
524 SPEX(bxa2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_BXA2G,
525 SSB_SPROM8_BXA2G_SHIFT);
526 SPEX(rssismf5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMF5G, 0);
527 SPEX(rssismc5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMC5G,
528 SSB_SPROM8_RSSISMC5G_SHIFT);
529 SPEX(rssisav5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISAV5G,
530 SSB_SPROM8_RSSISAV5G_SHIFT);
531 SPEX(bxa5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_BXA5G,
532 SSB_SPROM8_BXA5G_SHIFT);
533 SPEX(pa0b0, SSB_SPROM8_PA0B0, 0xFFFF, 0);
534 SPEX(pa0b1, SSB_SPROM8_PA0B1, 0xFFFF, 0);
535 SPEX(pa0b2, SSB_SPROM8_PA0B2, 0xFFFF, 0);
536 SPEX(pa1b0, SSB_SPROM8_PA1B0, 0xFFFF, 0);
537 SPEX(pa1b1, SSB_SPROM8_PA1B1, 0xFFFF, 0);
538 SPEX(pa1b2, SSB_SPROM8_PA1B2, 0xFFFF, 0);
539 SPEX(pa1lob0, SSB_SPROM8_PA1LOB0, 0xFFFF, 0);
540 SPEX(pa1lob1, SSB_SPROM8_PA1LOB1, 0xFFFF, 0);
541 SPEX(pa1lob2, SSB_SPROM8_PA1LOB2, 0xFFFF, 0);
542 SPEX(pa1hib0, SSB_SPROM8_PA1HIB0, 0xFFFF, 0);
543 SPEX(pa1hib1, SSB_SPROM8_PA1HIB1, 0xFFFF, 0);
544 SPEX(pa1hib2, SSB_SPROM8_PA1HIB2, 0xFFFF, 0);
545 SPEX(cck2gpo, SSB_SPROM8_CCK2GPO, 0xFFFF, 0);
546 SPEX32(ofdm2gpo, SSB_SPROM8_OFDM2GPO, 0xFFFFFFFF, 0);
547 SPEX32(ofdm5glpo, SSB_SPROM8_OFDM5GLPO, 0xFFFFFFFF, 0);
548 SPEX32(ofdm5gpo, SSB_SPROM8_OFDM5GPO, 0xFFFFFFFF, 0);
549 SPEX32(ofdm5ghpo, SSB_SPROM8_OFDM5GHPO, 0xFFFFFFFF, 0);
550
551 /* Extract the antenna gain values. */
552 SPEX(antenna_gain.ghz24.a0, SSB_SPROM8_AGAIN01,
553 SSB_SPROM8_AGAIN0, SSB_SPROM8_AGAIN0_SHIFT);
554 SPEX(antenna_gain.ghz24.a1, SSB_SPROM8_AGAIN01,
555 SSB_SPROM8_AGAIN1, SSB_SPROM8_AGAIN1_SHIFT);
556 SPEX(antenna_gain.ghz24.a2, SSB_SPROM8_AGAIN23,
557 SSB_SPROM8_AGAIN2, SSB_SPROM8_AGAIN2_SHIFT);
558 SPEX(antenna_gain.ghz24.a3, SSB_SPROM8_AGAIN23,
559 SSB_SPROM8_AGAIN3, SSB_SPROM8_AGAIN3_SHIFT);
560 memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
561 sizeof(out->antenna_gain.ghz5));
562
563 /* TODO - get remaining rev 8 stuff needed */
564 }
565
566 static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
567 const u16 *in, u16 size)
568 {
569 memset(out, 0, sizeof(*out));
570
571 out->revision = in[size - 1] & 0x00FF;
572 ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
573 memset(out->et0mac, 0xFF, 6); /* preset et0 and et1 mac */
574 memset(out->et1mac, 0xFF, 6);
575 if ((bus->chip_id & 0xFF00) == 0x4400) {
576 /* Workaround: The BCM44XX chip has a stupid revision
577 * number stored in the SPROM.
578 * Always extract r1. */
579 out->revision = 1;
580 sprom_extract_r123(out, in);
581 } else if (bus->chip_id == 0x4321) {
582 /* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
583 out->revision = 4;
584 sprom_extract_r45(out, in);
585 } else {
586 switch (out->revision) {
587 case 1:
588 case 2:
589 case 3:
590 sprom_extract_r123(out, in);
591 break;
592 case 4:
593 case 5:
594 sprom_extract_r45(out, in);
595 break;
596 case 8:
597 sprom_extract_r8(out, in);
598 break;
599 default:
600 ssb_printk(KERN_WARNING PFX "Unsupported SPROM"
601 " revision %d detected. Will extract"
602 " v1\n", out->revision);
603 out->revision = 1;
604 sprom_extract_r123(out, in);
605 }
606 }
607
608 if (out->boardflags_lo == 0xFFFF)
609 out->boardflags_lo = 0; /* per specs */
610 if (out->boardflags_hi == 0xFFFF)
611 out->boardflags_hi = 0; /* per specs */
612
613 return 0;
614 }
615
616 static int ssb_pci_sprom_get(struct ssb_bus *bus,
617 struct ssb_sprom *sprom)
618 {
619 const struct ssb_sprom *fallback;
620 int err = -ENOMEM;
621 u16 *buf;
622
623 buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
624 if (!buf)
625 goto out;
626 bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
627 sprom_do_read(bus, buf);
628 err = sprom_check_crc(buf, bus->sprom_size);
629 if (err) {
630 /* try for a 440 byte SPROM - revision 4 and higher */
631 kfree(buf);
632 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
633 GFP_KERNEL);
634 if (!buf)
635 goto out;
636 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
637 sprom_do_read(bus, buf);
638 err = sprom_check_crc(buf, bus->sprom_size);
639 if (err) {
640 /* All CRC attempts failed.
641 * Maybe there is no SPROM on the device?
642 * If we have a fallback, use that. */
643 fallback = ssb_get_fallback_sprom();
644 if (fallback) {
645 memcpy(sprom, fallback, sizeof(*sprom));
646 err = 0;
647 goto out_free;
648 }
649 ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
650 " SPROM CRC (corrupt SPROM)\n");
651 }
652 }
653 err = sprom_extract(bus, sprom, buf, bus->sprom_size);
654
655 out_free:
656 kfree(buf);
657 out:
658 return err;
659 }
660
661 static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
662 struct ssb_boardinfo *bi)
663 {
664 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
665 &bi->vendor);
666 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
667 &bi->type);
668 pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
669 &bi->rev);
670 }
671
672 int ssb_pci_get_invariants(struct ssb_bus *bus,
673 struct ssb_init_invariants *iv)
674 {
675 int err;
676
677 err = ssb_pci_sprom_get(bus, &iv->sprom);
678 if (err)
679 goto out;
680 ssb_pci_get_boardinfo(bus, &iv->boardinfo);
681
682 out:
683 return err;
684 }
685
686 #ifdef CONFIG_SSB_DEBUG
687 static int ssb_pci_assert_buspower(struct ssb_bus *bus)
688 {
689 if (likely(bus->powered_up))
690 return 0;
691
692 printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
693 "while accessing PCI MMIO space\n");
694 if (bus->power_warn_count <= 10) {
695 bus->power_warn_count++;
696 dump_stack();
697 }
698
699 return -ENODEV;
700 }
701 #else /* DEBUG */
702 static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
703 {
704 return 0;
705 }
706 #endif /* DEBUG */
707
708 static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
709 {
710 struct ssb_bus *bus = dev->bus;
711
712 if (unlikely(ssb_pci_assert_buspower(bus)))
713 return 0xFF;
714 if (unlikely(bus->mapped_device != dev)) {
715 if (unlikely(ssb_pci_switch_core(bus, dev)))
716 return 0xFF;
717 }
718 return ioread8(bus->mmio + offset);
719 }
720
721 static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
722 {
723 struct ssb_bus *bus = dev->bus;
724
725 if (unlikely(ssb_pci_assert_buspower(bus)))
726 return 0xFFFF;
727 if (unlikely(bus->mapped_device != dev)) {
728 if (unlikely(ssb_pci_switch_core(bus, dev)))
729 return 0xFFFF;
730 }
731 return ioread16(bus->mmio + offset);
732 }
733
734 static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
735 {
736 struct ssb_bus *bus = dev->bus;
737
738 if (unlikely(ssb_pci_assert_buspower(bus)))
739 return 0xFFFFFFFF;
740 if (unlikely(bus->mapped_device != dev)) {
741 if (unlikely(ssb_pci_switch_core(bus, dev)))
742 return 0xFFFFFFFF;
743 }
744 return ioread32(bus->mmio + offset);
745 }
746
747 #ifdef CONFIG_SSB_BLOCKIO
748 static void ssb_pci_block_read(struct ssb_device *dev, void *buffer,
749 size_t count, u16 offset, u8 reg_width)
750 {
751 struct ssb_bus *bus = dev->bus;
752 void __iomem *addr = bus->mmio + offset;
753
754 if (unlikely(ssb_pci_assert_buspower(bus)))
755 goto error;
756 if (unlikely(bus->mapped_device != dev)) {
757 if (unlikely(ssb_pci_switch_core(bus, dev)))
758 goto error;
759 }
760 switch (reg_width) {
761 case sizeof(u8):
762 ioread8_rep(addr, buffer, count);
763 break;
764 case sizeof(u16):
765 SSB_WARN_ON(count & 1);
766 ioread16_rep(addr, buffer, count >> 1);
767 break;
768 case sizeof(u32):
769 SSB_WARN_ON(count & 3);
770 ioread32_rep(addr, buffer, count >> 2);
771 break;
772 default:
773 SSB_WARN_ON(1);
774 }
775
776 return;
777 error:
778 memset(buffer, 0xFF, count);
779 }
780 #endif /* CONFIG_SSB_BLOCKIO */
781
782 static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
783 {
784 struct ssb_bus *bus = dev->bus;
785
786 if (unlikely(ssb_pci_assert_buspower(bus)))
787 return;
788 if (unlikely(bus->mapped_device != dev)) {
789 if (unlikely(ssb_pci_switch_core(bus, dev)))
790 return;
791 }
792 iowrite8(value, bus->mmio + offset);
793 }
794
795 static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
796 {
797 struct ssb_bus *bus = dev->bus;
798
799 if (unlikely(ssb_pci_assert_buspower(bus)))
800 return;
801 if (unlikely(bus->mapped_device != dev)) {
802 if (unlikely(ssb_pci_switch_core(bus, dev)))
803 return;
804 }
805 iowrite16(value, bus->mmio + offset);
806 }
807
808 static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
809 {
810 struct ssb_bus *bus = dev->bus;
811
812 if (unlikely(ssb_pci_assert_buspower(bus)))
813 return;
814 if (unlikely(bus->mapped_device != dev)) {
815 if (unlikely(ssb_pci_switch_core(bus, dev)))
816 return;
817 }
818 iowrite32(value, bus->mmio + offset);
819 }
820
821 #ifdef CONFIG_SSB_BLOCKIO
822 static void ssb_pci_block_write(struct ssb_device *dev, const void *buffer,
823 size_t count, u16 offset, u8 reg_width)
824 {
825 struct ssb_bus *bus = dev->bus;
826 void __iomem *addr = bus->mmio + offset;
827
828 if (unlikely(ssb_pci_assert_buspower(bus)))
829 return;
830 if (unlikely(bus->mapped_device != dev)) {
831 if (unlikely(ssb_pci_switch_core(bus, dev)))
832 return;
833 }
834 switch (reg_width) {
835 case sizeof(u8):
836 iowrite8_rep(addr, buffer, count);
837 break;
838 case sizeof(u16):
839 SSB_WARN_ON(count & 1);
840 iowrite16_rep(addr, buffer, count >> 1);
841 break;
842 case sizeof(u32):
843 SSB_WARN_ON(count & 3);
844 iowrite32_rep(addr, buffer, count >> 2);
845 break;
846 default:
847 SSB_WARN_ON(1);
848 }
849 }
850 #endif /* CONFIG_SSB_BLOCKIO */
851
852 /* Not "static", as it's used in main.c */
853 const struct ssb_bus_ops ssb_pci_ops = {
854 .read8 = ssb_pci_read8,
855 .read16 = ssb_pci_read16,
856 .read32 = ssb_pci_read32,
857 .write8 = ssb_pci_write8,
858 .write16 = ssb_pci_write16,
859 .write32 = ssb_pci_write32,
860 #ifdef CONFIG_SSB_BLOCKIO
861 .block_read = ssb_pci_block_read,
862 .block_write = ssb_pci_block_write,
863 #endif
864 };
865
866 static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
867 struct device_attribute *attr,
868 char *buf)
869 {
870 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
871 struct ssb_bus *bus;
872
873 bus = ssb_pci_dev_to_bus(pdev);
874 if (!bus)
875 return -ENODEV;
876
877 return ssb_attr_sprom_show(bus, buf, sprom_do_read);
878 }
879
880 static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
881 struct device_attribute *attr,
882 const char *buf, size_t count)
883 {
884 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
885 struct ssb_bus *bus;
886
887 bus = ssb_pci_dev_to_bus(pdev);
888 if (!bus)
889 return -ENODEV;
890
891 return ssb_attr_sprom_store(bus, buf, count,
892 sprom_check_crc, sprom_do_write);
893 }
894
895 static DEVICE_ATTR(ssb_sprom, 0600,
896 ssb_pci_attr_sprom_show,
897 ssb_pci_attr_sprom_store);
898
899 void ssb_pci_exit(struct ssb_bus *bus)
900 {
901 struct pci_dev *pdev;
902
903 if (bus->bustype != SSB_BUSTYPE_PCI)
904 return;
905
906 pdev = bus->host_pci;
907 device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
908 }
909
910 int ssb_pci_init(struct ssb_bus *bus)
911 {
912 struct pci_dev *pdev;
913 int err;
914
915 if (bus->bustype != SSB_BUSTYPE_PCI)
916 return 0;
917
918 pdev = bus->host_pci;
919 mutex_init(&bus->sprom_mutex);
920 err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
921 if (err)
922 goto out;
923
924 out:
925 return err;
926 }