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ext4: fix possible use-after-free in ext4_remove_li_request()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ssb / pci.c
blob158449e55044f91b93970a995c612ef9f1c28e76
1 /*
2 * Sonics Silicon Backplane PCI-Hostbus related functions.
3 *
4 * Copyright (C) 2005-2006 Michael Buesch <mb@bu3sch.de>
5 * Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
6 * Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
7 * Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
8 * Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
9 *
10 * Derived from the Broadcom 4400 device driver.
11 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
12 * Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
13 * Copyright (C) 2006 Broadcom Corporation.
14 *
15 * Licensed under the GNU/GPL. See COPYING for details.
16 */
17
18 #include <linux/ssb/ssb.h>
19 #include <linux/ssb/ssb_regs.h>
20 #include <linux/slab.h>
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23
24 #include "ssb_private.h"
25
26
27 /* Define the following to 1 to enable a printk on each coreswitch. */
28 #define SSB_VERBOSE_PCICORESWITCH_DEBUG 0
29
30
31 /* Lowlevel coreswitching */
32 int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
33 {
34 int err;
35 int attempts = 0;
36 u32 cur_core;
37
38 while (1) {
39 err = pci_write_config_dword(bus->host_pci, SSB_BAR0_WIN,
40 (coreidx * SSB_CORE_SIZE)
41 + SSB_ENUM_BASE);
42 if (err)
43 goto error;
44 err = pci_read_config_dword(bus->host_pci, SSB_BAR0_WIN,
45 &cur_core);
46 if (err)
47 goto error;
48 cur_core = (cur_core - SSB_ENUM_BASE)
49 / SSB_CORE_SIZE;
50 if (cur_core == coreidx)
51 break;
52
53 if (attempts++ > SSB_BAR0_MAX_RETRIES)
54 goto error;
55 udelay(10);
56 }
57 return 0;
58 error:
59 ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
60 return -ENODEV;
61 }
62
63 int ssb_pci_switch_core(struct ssb_bus *bus,
64 struct ssb_device *dev)
65 {
66 int err;
67 unsigned long flags;
68
69 #if SSB_VERBOSE_PCICORESWITCH_DEBUG
70 ssb_printk(KERN_INFO PFX
71 "Switching to %s core, index %d\n",
72 ssb_core_name(dev->id.coreid),
73 dev->core_index);
74 #endif
75
76 spin_lock_irqsave(&bus->bar_lock, flags);
77 err = ssb_pci_switch_coreidx(bus, dev->core_index);
78 if (!err)
79 bus->mapped_device = dev;
80 spin_unlock_irqrestore(&bus->bar_lock, flags);
81
82 return err;
83 }
84
85 /* Enable/disable the on board crystal oscillator and/or PLL. */
86 int ssb_pci_xtal(struct ssb_bus *bus, u32 what, int turn_on)
87 {
88 int err;
89 u32 in, out, outenable;
90 u16 pci_status;
91
92 if (bus->bustype != SSB_BUSTYPE_PCI)
93 return 0;
94
95 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_IN, &in);
96 if (err)
97 goto err_pci;
98 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT, &out);
99 if (err)
100 goto err_pci;
101 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, &outenable);
102 if (err)
103 goto err_pci;
104
105 outenable |= what;
106
107 if (turn_on) {
108 /* Avoid glitching the clock if GPRS is already using it.
109 * We can't actually read the state of the PLLPD so we infer it
110 * by the value of XTAL_PU which *is* readable via gpioin.
111 */
112 if (!(in & SSB_GPIO_XTAL)) {
113 if (what & SSB_GPIO_XTAL) {
114 /* Turn the crystal on */
115 out |= SSB_GPIO_XTAL;
116 if (what & SSB_GPIO_PLL)
117 out |= SSB_GPIO_PLL;
118 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
119 if (err)
120 goto err_pci;
121 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE,
122 outenable);
123 if (err)
124 goto err_pci;
125 msleep(1);
126 }
127 if (what & SSB_GPIO_PLL) {
128 /* Turn the PLL on */
129 out &= ~SSB_GPIO_PLL;
130 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
131 if (err)
132 goto err_pci;
133 msleep(5);
134 }
135 }
136
137 err = pci_read_config_word(bus->host_pci, PCI_STATUS, &pci_status);
138 if (err)
139 goto err_pci;
140 pci_status &= ~PCI_STATUS_SIG_TARGET_ABORT;
141 err = pci_write_config_word(bus->host_pci, PCI_STATUS, pci_status);
142 if (err)
143 goto err_pci;
144 } else {
145 if (what & SSB_GPIO_XTAL) {
146 /* Turn the crystal off */
147 out &= ~SSB_GPIO_XTAL;
148 }
149 if (what & SSB_GPIO_PLL) {
150 /* Turn the PLL off */
151 out |= SSB_GPIO_PLL;
152 }
153 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
154 if (err)
155 goto err_pci;
156 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, outenable);
157 if (err)
158 goto err_pci;
159 }
160
161 out:
162 return err;
163
164 err_pci:
165 printk(KERN_ERR PFX "Error: ssb_pci_xtal() could not access PCI config space!\n");
166 err = -EBUSY;
167 goto out;
168 }
169
170 /* Get the word-offset for a SSB_SPROM_XXX define. */
171 #define SPOFF(offset) ((offset) / sizeof(u16))
172 /* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
173 #define SPEX16(_outvar, _offset, _mask, _shift) \
174 out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
175 #define SPEX32(_outvar, _offset, _mask, _shift) \
176 out->_outvar = ((((u32)in[SPOFF((_offset)+2)] << 16 | \
177 in[SPOFF(_offset)]) & (_mask)) >> (_shift))
178 #define SPEX(_outvar, _offset, _mask, _shift) \
179 SPEX16(_outvar, _offset, _mask, _shift)
180
181
182 static inline u8 ssb_crc8(u8 crc, u8 data)
183 {
184 /* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */
185 static const u8 t[] = {
186 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
187 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
188 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
189 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
190 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
191 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
192 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
193 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
194 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
195 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
196 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
197 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
198 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
199 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
200 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
201 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
202 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
203 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
204 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
205 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
206 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
207 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
208 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
209 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
210 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
211 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
212 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
213 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
214 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
215 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
216 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
217 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
218 };
219 return t[crc ^ data];
220 }
221
222 static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
223 {
224 int word;
225 u8 crc = 0xFF;
226
227 for (word = 0; word < size - 1; word++) {
228 crc = ssb_crc8(crc, sprom[word] & 0x00FF);
229 crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
230 }
231 crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
232 crc ^= 0xFF;
233
234 return crc;
235 }
236
237 static int sprom_check_crc(const u16 *sprom, size_t size)
238 {
239 u8 crc;
240 u8 expected_crc;
241 u16 tmp;
242
243 crc = ssb_sprom_crc(sprom, size);
244 tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
245 expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
246 if (crc != expected_crc)
247 return -EPROTO;
248
249 return 0;
250 }
251
252 static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
253 {
254 int i;
255
256 for (i = 0; i < bus->sprom_size; i++)
257 sprom[i] = ioread16(bus->mmio + bus->sprom_offset + (i * 2));
258
259 return 0;
260 }
261
262 static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
263 {
264 struct pci_dev *pdev = bus->host_pci;
265 int i, err;
266 u32 spromctl;
267 u16 size = bus->sprom_size;
268
269 ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
270 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
271 if (err)
272 goto err_ctlreg;
273 spromctl |= SSB_SPROMCTL_WE;
274 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
275 if (err)
276 goto err_ctlreg;
277 ssb_printk(KERN_NOTICE PFX "[ 0%%");
278 msleep(500);
279 for (i = 0; i < size; i++) {
280 if (i == size / 4)
281 ssb_printk("25%%");
282 else if (i == size / 2)
283 ssb_printk("50%%");
284 else if (i == (size * 3) / 4)
285 ssb_printk("75%%");
286 else if (i % 2)
287 ssb_printk(".");
288 writew(sprom[i], bus->mmio + bus->sprom_offset + (i * 2));
289 mmiowb();
290 msleep(20);
291 }
292 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
293 if (err)
294 goto err_ctlreg;
295 spromctl &= ~SSB_SPROMCTL_WE;
296 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
297 if (err)
298 goto err_ctlreg;
299 msleep(500);
300 ssb_printk("100%% ]\n");
301 ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
302
303 return 0;
304 err_ctlreg:
305 ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
306 return err;
307 }
308
309 static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
310 u16 mask, u16 shift)
311 {
312 u16 v;
313 u8 gain;
314
315 v = in[SPOFF(SSB_SPROM1_AGAIN)];
316 gain = (v & mask) >> shift;
317 if (gain == 0xFF)
318 gain = 2; /* If unset use 2dBm */
319 if (sprom_revision == 1) {
320 /* Convert to Q5.2 */
321 gain <<= 2;
322 } else {
323 /* Q5.2 Fractional part is stored in 0xC0 */
324 gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
325 }
326
327 return (s8)gain;
328 }
329
330 static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
331 {
332 int i;
333 u16 v;
334 s8 gain;
335 u16 loc[3];
336
337 if (out->revision == 3) /* rev 3 moved MAC */
338 loc[0] = SSB_SPROM3_IL0MAC;
339 else {
340 loc[0] = SSB_SPROM1_IL0MAC;
341 loc[1] = SSB_SPROM1_ET0MAC;
342 loc[2] = SSB_SPROM1_ET1MAC;
343 }
344 for (i = 0; i < 3; i++) {
345 v = in[SPOFF(loc[0]) + i];
346 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
347 }
348 if (out->revision < 3) { /* only rev 1-2 have et0, et1 */
349 for (i = 0; i < 3; i++) {
350 v = in[SPOFF(loc[1]) + i];
351 *(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
352 }
353 for (i = 0; i < 3; i++) {
354 v = in[SPOFF(loc[2]) + i];
355 *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
356 }
357 }
358 SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
359 SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
360 SSB_SPROM1_ETHPHY_ET1A_SHIFT);
361 SPEX(et0mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0M, 14);
362 SPEX(et1mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1M, 15);
363 SPEX(board_rev, SSB_SPROM1_BINF, SSB_SPROM1_BINF_BREV, 0);
364 SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
365 SSB_SPROM1_BINF_CCODE_SHIFT);
366 SPEX(ant_available_a, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTA,
367 SSB_SPROM1_BINF_ANTA_SHIFT);
368 SPEX(ant_available_bg, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTBG,
369 SSB_SPROM1_BINF_ANTBG_SHIFT);
370 SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
371 SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
372 SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
373 SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
374 SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
375 SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
376 SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
377 SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
378 SSB_SPROM1_GPIOA_P1_SHIFT);
379 SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
380 SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
381 SSB_SPROM1_GPIOB_P3_SHIFT);
382 SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
383 SSB_SPROM1_MAXPWR_A_SHIFT);
384 SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
385 SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
386 SSB_SPROM1_ITSSI_A_SHIFT);
387 SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
388 SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
389 if (out->revision >= 2)
390 SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
391
392 /* Extract the antenna gain values. */
393 gain = r123_extract_antgain(out->revision, in,
394 SSB_SPROM1_AGAIN_BG,
395 SSB_SPROM1_AGAIN_BG_SHIFT);
396 out->antenna_gain.ghz24.a0 = gain;
397 out->antenna_gain.ghz24.a1 = gain;
398 out->antenna_gain.ghz24.a2 = gain;
399 out->antenna_gain.ghz24.a3 = gain;
400 gain = r123_extract_antgain(out->revision, in,
401 SSB_SPROM1_AGAIN_A,
402 SSB_SPROM1_AGAIN_A_SHIFT);
403 out->antenna_gain.ghz5.a0 = gain;
404 out->antenna_gain.ghz5.a1 = gain;
405 out->antenna_gain.ghz5.a2 = gain;
406 out->antenna_gain.ghz5.a3 = gain;
407 }
408
409 /* Revs 4 5 and 8 have partially shared layout */
410 static void sprom_extract_r458(struct ssb_sprom *out, const u16 *in)
411 {
412 SPEX(txpid2g[0], SSB_SPROM4_TXPID2G01,
413 SSB_SPROM4_TXPID2G0, SSB_SPROM4_TXPID2G0_SHIFT);
414 SPEX(txpid2g[1], SSB_SPROM4_TXPID2G01,
415 SSB_SPROM4_TXPID2G1, SSB_SPROM4_TXPID2G1_SHIFT);
416 SPEX(txpid2g[2], SSB_SPROM4_TXPID2G23,
417 SSB_SPROM4_TXPID2G2, SSB_SPROM4_TXPID2G2_SHIFT);
418 SPEX(txpid2g[3], SSB_SPROM4_TXPID2G23,
419 SSB_SPROM4_TXPID2G3, SSB_SPROM4_TXPID2G3_SHIFT);
420
421 SPEX(txpid5gl[0], SSB_SPROM4_TXPID5GL01,
422 SSB_SPROM4_TXPID5GL0, SSB_SPROM4_TXPID5GL0_SHIFT);
423 SPEX(txpid5gl[1], SSB_SPROM4_TXPID5GL01,
424 SSB_SPROM4_TXPID5GL1, SSB_SPROM4_TXPID5GL1_SHIFT);
425 SPEX(txpid5gl[2], SSB_SPROM4_TXPID5GL23,
426 SSB_SPROM4_TXPID5GL2, SSB_SPROM4_TXPID5GL2_SHIFT);
427 SPEX(txpid5gl[3], SSB_SPROM4_TXPID5GL23,
428 SSB_SPROM4_TXPID5GL3, SSB_SPROM4_TXPID5GL3_SHIFT);
429
430 SPEX(txpid5g[0], SSB_SPROM4_TXPID5G01,
431 SSB_SPROM4_TXPID5G0, SSB_SPROM4_TXPID5G0_SHIFT);
432 SPEX(txpid5g[1], SSB_SPROM4_TXPID5G01,
433 SSB_SPROM4_TXPID5G1, SSB_SPROM4_TXPID5G1_SHIFT);
434 SPEX(txpid5g[2], SSB_SPROM4_TXPID5G23,
435 SSB_SPROM4_TXPID5G2, SSB_SPROM4_TXPID5G2_SHIFT);
436 SPEX(txpid5g[3], SSB_SPROM4_TXPID5G23,
437 SSB_SPROM4_TXPID5G3, SSB_SPROM4_TXPID5G3_SHIFT);
438
439 SPEX(txpid5gh[0], SSB_SPROM4_TXPID5GH01,
440 SSB_SPROM4_TXPID5GH0, SSB_SPROM4_TXPID5GH0_SHIFT);
441 SPEX(txpid5gh[1], SSB_SPROM4_TXPID5GH01,
442 SSB_SPROM4_TXPID5GH1, SSB_SPROM4_TXPID5GH1_SHIFT);
443 SPEX(txpid5gh[2], SSB_SPROM4_TXPID5GH23,
444 SSB_SPROM4_TXPID5GH2, SSB_SPROM4_TXPID5GH2_SHIFT);
445 SPEX(txpid5gh[3], SSB_SPROM4_TXPID5GH23,
446 SSB_SPROM4_TXPID5GH3, SSB_SPROM4_TXPID5GH3_SHIFT);
447 }
448
449 static void sprom_extract_r45(struct ssb_sprom *out, const u16 *in)
450 {
451 int i;
452 u16 v;
453 u16 il0mac_offset;
454
455 if (out->revision == 4)
456 il0mac_offset = SSB_SPROM4_IL0MAC;
457 else
458 il0mac_offset = SSB_SPROM5_IL0MAC;
459 /* extract the MAC address */
460 for (i = 0; i < 3; i++) {
461 v = in[SPOFF(il0mac_offset) + i];
462 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
463 }
464 SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
465 SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
466 SSB_SPROM4_ETHPHY_ET1A_SHIFT);
467 if (out->revision == 4) {
468 SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
469 SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
470 SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
471 } else {
472 SPEX(country_code, SSB_SPROM5_CCODE, 0xFFFF, 0);
473 SPEX(boardflags_lo, SSB_SPROM5_BFLLO, 0xFFFF, 0);
474 SPEX(boardflags_hi, SSB_SPROM5_BFLHI, 0xFFFF, 0);
475 }
476 SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
477 SSB_SPROM4_ANTAVAIL_A_SHIFT);
478 SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
479 SSB_SPROM4_ANTAVAIL_BG_SHIFT);
480 SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
481 SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
482 SSB_SPROM4_ITSSI_BG_SHIFT);
483 SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
484 SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
485 SSB_SPROM4_ITSSI_A_SHIFT);
486 if (out->revision == 4) {
487 SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
488 SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
489 SSB_SPROM4_GPIOA_P1_SHIFT);
490 SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
491 SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
492 SSB_SPROM4_GPIOB_P3_SHIFT);
493 } else {
494 SPEX(gpio0, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P0, 0);
495 SPEX(gpio1, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P1,
496 SSB_SPROM5_GPIOA_P1_SHIFT);
497 SPEX(gpio2, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P2, 0);
498 SPEX(gpio3, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P3,
499 SSB_SPROM5_GPIOB_P3_SHIFT);
500 }
501
502 /* Extract the antenna gain values. */
503 SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
504 SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
505 SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
506 SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
507 SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
508 SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
509 SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
510 SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
511 memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
512 sizeof(out->antenna_gain.ghz5));
513
514 sprom_extract_r458(out, in);
515
516 /* TODO - get remaining rev 4 stuff needed */
517 }
518
519 static void sprom_extract_r8(struct ssb_sprom *out, const u16 *in)
520 {
521 int i;
522 u16 v;
523
524 /* extract the MAC address */
525 for (i = 0; i < 3; i++) {
526 v = in[SPOFF(SSB_SPROM8_IL0MAC) + i];
527 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
528 }
529 SPEX(country_code, SSB_SPROM8_CCODE, 0xFFFF, 0);
530 SPEX(boardflags_lo, SSB_SPROM8_BFLLO, 0xFFFF, 0);
531 SPEX(boardflags_hi, SSB_SPROM8_BFLHI, 0xFFFF, 0);
532 SPEX(boardflags2_lo, SSB_SPROM8_BFL2LO, 0xFFFF, 0);
533 SPEX(boardflags2_hi, SSB_SPROM8_BFL2HI, 0xFFFF, 0);
534 SPEX(ant_available_a, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_A,
535 SSB_SPROM8_ANTAVAIL_A_SHIFT);
536 SPEX(ant_available_bg, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_BG,
537 SSB_SPROM8_ANTAVAIL_BG_SHIFT);
538 SPEX(maxpwr_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_MAXP_BG_MASK, 0);
539 SPEX(itssi_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_ITSSI_BG,
540 SSB_SPROM8_ITSSI_BG_SHIFT);
541 SPEX(maxpwr_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_MAXP_A_MASK, 0);
542 SPEX(itssi_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_ITSSI_A,
543 SSB_SPROM8_ITSSI_A_SHIFT);
544 SPEX(maxpwr_ah, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AH_MASK, 0);
545 SPEX(maxpwr_al, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AL_MASK,
546 SSB_SPROM8_MAXP_AL_SHIFT);
547 SPEX(gpio0, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P0, 0);
548 SPEX(gpio1, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P1,
549 SSB_SPROM8_GPIOA_P1_SHIFT);
550 SPEX(gpio2, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P2, 0);
551 SPEX(gpio3, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P3,
552 SSB_SPROM8_GPIOB_P3_SHIFT);
553 SPEX(tri2g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI2G, 0);
554 SPEX(tri5g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI5G,
555 SSB_SPROM8_TRI5G_SHIFT);
556 SPEX(tri5gl, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GL, 0);
557 SPEX(tri5gh, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GH,
558 SSB_SPROM8_TRI5GH_SHIFT);
559 SPEX(rxpo2g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO2G, 0);
560 SPEX(rxpo5g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO5G,
561 SSB_SPROM8_RXPO5G_SHIFT);
562 SPEX(rssismf2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMF2G, 0);
563 SPEX(rssismc2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMC2G,
564 SSB_SPROM8_RSSISMC2G_SHIFT);
565 SPEX(rssisav2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISAV2G,
566 SSB_SPROM8_RSSISAV2G_SHIFT);
567 SPEX(bxa2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_BXA2G,
568 SSB_SPROM8_BXA2G_SHIFT);
569 SPEX(rssismf5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMF5G, 0);
570 SPEX(rssismc5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMC5G,
571 SSB_SPROM8_RSSISMC5G_SHIFT);
572 SPEX(rssisav5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISAV5G,
573 SSB_SPROM8_RSSISAV5G_SHIFT);
574 SPEX(bxa5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_BXA5G,
575 SSB_SPROM8_BXA5G_SHIFT);
576 SPEX(pa0b0, SSB_SPROM8_PA0B0, 0xFFFF, 0);
577 SPEX(pa0b1, SSB_SPROM8_PA0B1, 0xFFFF, 0);
578 SPEX(pa0b2, SSB_SPROM8_PA0B2, 0xFFFF, 0);
579 SPEX(pa1b0, SSB_SPROM8_PA1B0, 0xFFFF, 0);
580 SPEX(pa1b1, SSB_SPROM8_PA1B1, 0xFFFF, 0);
581 SPEX(pa1b2, SSB_SPROM8_PA1B2, 0xFFFF, 0);
582 SPEX(pa1lob0, SSB_SPROM8_PA1LOB0, 0xFFFF, 0);
583 SPEX(pa1lob1, SSB_SPROM8_PA1LOB1, 0xFFFF, 0);
584 SPEX(pa1lob2, SSB_SPROM8_PA1LOB2, 0xFFFF, 0);
585 SPEX(pa1hib0, SSB_SPROM8_PA1HIB0, 0xFFFF, 0);
586 SPEX(pa1hib1, SSB_SPROM8_PA1HIB1, 0xFFFF, 0);
587 SPEX(pa1hib2, SSB_SPROM8_PA1HIB2, 0xFFFF, 0);
588 SPEX(cck2gpo, SSB_SPROM8_CCK2GPO, 0xFFFF, 0);
589 SPEX32(ofdm2gpo, SSB_SPROM8_OFDM2GPO, 0xFFFFFFFF, 0);
590 SPEX32(ofdm5glpo, SSB_SPROM8_OFDM5GLPO, 0xFFFFFFFF, 0);
591 SPEX32(ofdm5gpo, SSB_SPROM8_OFDM5GPO, 0xFFFFFFFF, 0);
592 SPEX32(ofdm5ghpo, SSB_SPROM8_OFDM5GHPO, 0xFFFFFFFF, 0);
593
594 /* Extract the antenna gain values. */
595 SPEX(antenna_gain.ghz24.a0, SSB_SPROM8_AGAIN01,
596 SSB_SPROM8_AGAIN0, SSB_SPROM8_AGAIN0_SHIFT);
597 SPEX(antenna_gain.ghz24.a1, SSB_SPROM8_AGAIN01,
598 SSB_SPROM8_AGAIN1, SSB_SPROM8_AGAIN1_SHIFT);
599 SPEX(antenna_gain.ghz24.a2, SSB_SPROM8_AGAIN23,
600 SSB_SPROM8_AGAIN2, SSB_SPROM8_AGAIN2_SHIFT);
601 SPEX(antenna_gain.ghz24.a3, SSB_SPROM8_AGAIN23,
602 SSB_SPROM8_AGAIN3, SSB_SPROM8_AGAIN3_SHIFT);
603 memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
604 sizeof(out->antenna_gain.ghz5));
605
606 sprom_extract_r458(out, in);
607
608 /* TODO - get remaining rev 8 stuff needed */
609 }
610
611 static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
612 const u16 *in, u16 size)
613 {
614 memset(out, 0, sizeof(*out));
615
616 out->revision = in[size - 1] & 0x00FF;
617 ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
618 memset(out->et0mac, 0xFF, 6); /* preset et0 and et1 mac */
619 memset(out->et1mac, 0xFF, 6);
620
621 if ((bus->chip_id & 0xFF00) == 0x4400) {
622 /* Workaround: The BCM44XX chip has a stupid revision
623 * number stored in the SPROM.
624 * Always extract r1. */
625 out->revision = 1;
626 ssb_dprintk(KERN_DEBUG PFX "SPROM treated as revision %d\n", out->revision);
627 }
628
629 switch (out->revision) {
630 case 1:
631 case 2:
632 case 3:
633 sprom_extract_r123(out, in);
634 break;
635 case 4:
636 case 5:
637 sprom_extract_r45(out, in);
638 break;
639 case 8:
640 sprom_extract_r8(out, in);
641 break;
642 default:
643 ssb_printk(KERN_WARNING PFX "Unsupported SPROM"
644 " revision %d detected. Will extract"
645 " v1\n", out->revision);
646 out->revision = 1;
647 sprom_extract_r123(out, in);
648 }
649
650 if (out->boardflags_lo == 0xFFFF)
651 out->boardflags_lo = 0; /* per specs */
652 if (out->boardflags_hi == 0xFFFF)
653 out->boardflags_hi = 0; /* per specs */
654
655 return 0;
656 }
657
658 static int ssb_pci_sprom_get(struct ssb_bus *bus,
659 struct ssb_sprom *sprom)
660 {
661 const struct ssb_sprom *fallback;
662 int err;
663 u16 *buf;
664
665 if (!ssb_is_sprom_available(bus)) {
666 ssb_printk(KERN_ERR PFX "No SPROM available!\n");
667 return -ENODEV;
668 }
669 if (bus->chipco.dev) { /* can be unavailible! */
670 /*
671 * get SPROM offset: SSB_SPROM_BASE1 except for
672 * chipcommon rev >= 31 or chip ID is 0x4312 and
673 * chipcommon status & 3 == 2
674 */
675 if (bus->chipco.dev->id.revision >= 31)
676 bus->sprom_offset = SSB_SPROM_BASE31;
677 else if (bus->chip_id == 0x4312 &&
678 (bus->chipco.status & 0x03) == 2)
679 bus->sprom_offset = SSB_SPROM_BASE31;
680 else
681 bus->sprom_offset = SSB_SPROM_BASE1;
682 } else {
683 bus->sprom_offset = SSB_SPROM_BASE1;
684 }
685 ssb_dprintk(KERN_INFO PFX "SPROM offset is 0x%x\n", bus->sprom_offset);
686
687 buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
688 if (!buf)
689 return -ENOMEM;
690 bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
691 sprom_do_read(bus, buf);
692 err = sprom_check_crc(buf, bus->sprom_size);
693 if (err) {
694 /* try for a 440 byte SPROM - revision 4 and higher */
695 kfree(buf);
696 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
697 GFP_KERNEL);
698 if (!buf)
699 return -ENOMEM;
700 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
701 sprom_do_read(bus, buf);
702 err = sprom_check_crc(buf, bus->sprom_size);
703 if (err) {
704 /* All CRC attempts failed.
705 * Maybe there is no SPROM on the device?
706 * If we have a fallback, use that. */
707 fallback = ssb_get_fallback_sprom();
708 if (fallback) {
709 memcpy(sprom, fallback, sizeof(*sprom));
710 err = 0;
711 goto out_free;
712 }
713 ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
714 " SPROM CRC (corrupt SPROM)\n");
715 }
716 }
717 err = sprom_extract(bus, sprom, buf, bus->sprom_size);
718
719 out_free:
720 kfree(buf);
721 return err;
722 }
723
724 static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
725 struct ssb_boardinfo *bi)
726 {
727 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
728 &bi->vendor);
729 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
730 &bi->type);
731 pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
732 &bi->rev);
733 }
734
735 int ssb_pci_get_invariants(struct ssb_bus *bus,
736 struct ssb_init_invariants *iv)
737 {
738 int err;
739
740 err = ssb_pci_sprom_get(bus, &iv->sprom);
741 if (err)
742 goto out;
743 ssb_pci_get_boardinfo(bus, &iv->boardinfo);
744
745 out:
746 return err;
747 }
748
749 #ifdef CONFIG_SSB_DEBUG
750 static int ssb_pci_assert_buspower(struct ssb_bus *bus)
751 {
752 if (likely(bus->powered_up))
753 return 0;
754
755 printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
756 "while accessing PCI MMIO space\n");
757 if (bus->power_warn_count <= 10) {
758 bus->power_warn_count++;
759 dump_stack();
760 }
761
762 return -ENODEV;
763 }
764 #else /* DEBUG */
765 static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
766 {
767 return 0;
768 }
769 #endif /* DEBUG */
770
771 static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
772 {
773 struct ssb_bus *bus = dev->bus;
774
775 if (unlikely(ssb_pci_assert_buspower(bus)))
776 return 0xFF;
777 if (unlikely(bus->mapped_device != dev)) {
778 if (unlikely(ssb_pci_switch_core(bus, dev)))
779 return 0xFF;
780 }
781 return ioread8(bus->mmio + offset);
782 }
783
784 static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
785 {
786 struct ssb_bus *bus = dev->bus;
787
788 if (unlikely(ssb_pci_assert_buspower(bus)))
789 return 0xFFFF;
790 if (unlikely(bus->mapped_device != dev)) {
791 if (unlikely(ssb_pci_switch_core(bus, dev)))
792 return 0xFFFF;
793 }
794 return ioread16(bus->mmio + offset);
795 }
796
797 static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
798 {
799 struct ssb_bus *bus = dev->bus;
800
801 if (unlikely(ssb_pci_assert_buspower(bus)))
802 return 0xFFFFFFFF;
803 if (unlikely(bus->mapped_device != dev)) {
804 if (unlikely(ssb_pci_switch_core(bus, dev)))
805 return 0xFFFFFFFF;
806 }
807 return ioread32(bus->mmio + offset);
808 }
809
810 #ifdef CONFIG_SSB_BLOCKIO
811 static void ssb_pci_block_read(struct ssb_device *dev, void *buffer,
812 size_t count, u16 offset, u8 reg_width)
813 {
814 struct ssb_bus *bus = dev->bus;
815 void __iomem *addr = bus->mmio + offset;
816
817 if (unlikely(ssb_pci_assert_buspower(bus)))
818 goto error;
819 if (unlikely(bus->mapped_device != dev)) {
820 if (unlikely(ssb_pci_switch_core(bus, dev)))
821 goto error;
822 }
823 switch (reg_width) {
824 case sizeof(u8):
825 ioread8_rep(addr, buffer, count);
826 break;
827 case sizeof(u16):
828 SSB_WARN_ON(count & 1);
829 ioread16_rep(addr, buffer, count >> 1);
830 break;
831 case sizeof(u32):
832 SSB_WARN_ON(count & 3);
833 ioread32_rep(addr, buffer, count >> 2);
834 break;
835 default:
836 SSB_WARN_ON(1);
837 }
838
839 return;
840 error:
841 memset(buffer, 0xFF, count);
842 }
843 #endif /* CONFIG_SSB_BLOCKIO */
844
845 static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
846 {
847 struct ssb_bus *bus = dev->bus;
848
849 if (unlikely(ssb_pci_assert_buspower(bus)))
850 return;
851 if (unlikely(bus->mapped_device != dev)) {
852 if (unlikely(ssb_pci_switch_core(bus, dev)))
853 return;
854 }
855 iowrite8(value, bus->mmio + offset);
856 }
857
858 static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
859 {
860 struct ssb_bus *bus = dev->bus;
861
862 if (unlikely(ssb_pci_assert_buspower(bus)))
863 return;
864 if (unlikely(bus->mapped_device != dev)) {
865 if (unlikely(ssb_pci_switch_core(bus, dev)))
866 return;
867 }
868 iowrite16(value, bus->mmio + offset);
869 }
870
871 static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
872 {
873 struct ssb_bus *bus = dev->bus;
874
875 if (unlikely(ssb_pci_assert_buspower(bus)))
876 return;
877 if (unlikely(bus->mapped_device != dev)) {
878 if (unlikely(ssb_pci_switch_core(bus, dev)))
879 return;
880 }
881 iowrite32(value, bus->mmio + offset);
882 }
883
884 #ifdef CONFIG_SSB_BLOCKIO
885 static void ssb_pci_block_write(struct ssb_device *dev, const void *buffer,
886 size_t count, u16 offset, u8 reg_width)
887 {
888 struct ssb_bus *bus = dev->bus;
889 void __iomem *addr = bus->mmio + offset;
890
891 if (unlikely(ssb_pci_assert_buspower(bus)))
892 return;
893 if (unlikely(bus->mapped_device != dev)) {
894 if (unlikely(ssb_pci_switch_core(bus, dev)))
895 return;
896 }
897 switch (reg_width) {
898 case sizeof(u8):
899 iowrite8_rep(addr, buffer, count);
900 break;
901 case sizeof(u16):
902 SSB_WARN_ON(count & 1);
903 iowrite16_rep(addr, buffer, count >> 1);
904 break;
905 case sizeof(u32):
906 SSB_WARN_ON(count & 3);
907 iowrite32_rep(addr, buffer, count >> 2);
908 break;
909 default:
910 SSB_WARN_ON(1);
911 }
912 }
913 #endif /* CONFIG_SSB_BLOCKIO */
914
915 /* Not "static", as it's used in main.c */
916 const struct ssb_bus_ops ssb_pci_ops = {
917 .read8 = ssb_pci_read8,
918 .read16 = ssb_pci_read16,
919 .read32 = ssb_pci_read32,
920 .write8 = ssb_pci_write8,
921 .write16 = ssb_pci_write16,
922 .write32 = ssb_pci_write32,
923 #ifdef CONFIG_SSB_BLOCKIO
924 .block_read = ssb_pci_block_read,
925 .block_write = ssb_pci_block_write,
926 #endif
927 };
928
929 static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
930 struct device_attribute *attr,
931 char *buf)
932 {
933 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
934 struct ssb_bus *bus;
935
936 bus = ssb_pci_dev_to_bus(pdev);
937 if (!bus)
938 return -ENODEV;
939
940 return ssb_attr_sprom_show(bus, buf, sprom_do_read);
941 }
942
943 static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
944 struct device_attribute *attr,
945 const char *buf, size_t count)
946 {
947 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
948 struct ssb_bus *bus;
949
950 bus = ssb_pci_dev_to_bus(pdev);
951 if (!bus)
952 return -ENODEV;
953
954 return ssb_attr_sprom_store(bus, buf, count,
955 sprom_check_crc, sprom_do_write);
956 }
957
958 static DEVICE_ATTR(ssb_sprom, 0600,
959 ssb_pci_attr_sprom_show,
960 ssb_pci_attr_sprom_store);
961
962 void ssb_pci_exit(struct ssb_bus *bus)
963 {
964 struct pci_dev *pdev;
965
966 if (bus->bustype != SSB_BUSTYPE_PCI)
967 return;
968
969 pdev = bus->host_pci;
970 device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
971 }
972
973 int ssb_pci_init(struct ssb_bus *bus)
974 {
975 struct pci_dev *pdev;
976 int err;
977
978 if (bus->bustype != SSB_BUSTYPE_PCI)
979 return 0;
980
981 pdev = bus->host_pci;
982 mutex_init(&bus->sprom_mutex);
983 err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
984 if (err)
985 goto out;
986
987 out:
988 return err;
989 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree