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drivers/block/drbd: Use kzalloc
[linux-2.6/kvm.git] / drivers / ssb / pci.c
bloba8dbb06623c96f17e61ad996df9647ab699a6740
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) - SSB_SPROM_BASE) / 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 + SSB_SPROM_BASE + (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 + SSB_SPROM_BASE + (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 static void sprom_extract_r45(struct ssb_sprom *out, const u16 *in)
410 {
411 int i;
412 u16 v;
413 u16 il0mac_offset;
414
415 if (out->revision == 4)
416 il0mac_offset = SSB_SPROM4_IL0MAC;
417 else
418 il0mac_offset = SSB_SPROM5_IL0MAC;
419 /* extract the MAC address */
420 for (i = 0; i < 3; i++) {
421 v = in[SPOFF(il0mac_offset) + i];
422 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
423 }
424 SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
425 SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
426 SSB_SPROM4_ETHPHY_ET1A_SHIFT);
427 if (out->revision == 4) {
428 SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
429 SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
430 SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
431 } else {
432 SPEX(country_code, SSB_SPROM5_CCODE, 0xFFFF, 0);
433 SPEX(boardflags_lo, SSB_SPROM5_BFLLO, 0xFFFF, 0);
434 SPEX(boardflags_hi, SSB_SPROM5_BFLHI, 0xFFFF, 0);
435 }
436 SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
437 SSB_SPROM4_ANTAVAIL_A_SHIFT);
438 SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
439 SSB_SPROM4_ANTAVAIL_BG_SHIFT);
440 SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
441 SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
442 SSB_SPROM4_ITSSI_BG_SHIFT);
443 SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
444 SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
445 SSB_SPROM4_ITSSI_A_SHIFT);
446 if (out->revision == 4) {
447 SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
448 SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
449 SSB_SPROM4_GPIOA_P1_SHIFT);
450 SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
451 SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
452 SSB_SPROM4_GPIOB_P3_SHIFT);
453 } else {
454 SPEX(gpio0, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P0, 0);
455 SPEX(gpio1, SSB_SPROM5_GPIOA, SSB_SPROM5_GPIOA_P1,
456 SSB_SPROM5_GPIOA_P1_SHIFT);
457 SPEX(gpio2, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P2, 0);
458 SPEX(gpio3, SSB_SPROM5_GPIOB, SSB_SPROM5_GPIOB_P3,
459 SSB_SPROM5_GPIOB_P3_SHIFT);
460 }
461
462 /* Extract the antenna gain values. */
463 SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
464 SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
465 SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
466 SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
467 SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
468 SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
469 SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
470 SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
471 memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
472 sizeof(out->antenna_gain.ghz5));
473
474 /* TODO - get remaining rev 4 stuff needed */
475 }
476
477 static void sprom_extract_r8(struct ssb_sprom *out, const u16 *in)
478 {
479 int i;
480 u16 v;
481
482 /* extract the MAC address */
483 for (i = 0; i < 3; i++) {
484 v = in[SPOFF(SSB_SPROM8_IL0MAC) + i];
485 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
486 }
487 SPEX(country_code, SSB_SPROM8_CCODE, 0xFFFF, 0);
488 SPEX(boardflags_lo, SSB_SPROM8_BFLLO, 0xFFFF, 0);
489 SPEX(boardflags_hi, SSB_SPROM8_BFLHI, 0xFFFF, 0);
490 SPEX(boardflags2_lo, SSB_SPROM8_BFL2LO, 0xFFFF, 0);
491 SPEX(boardflags2_hi, SSB_SPROM8_BFL2HI, 0xFFFF, 0);
492 SPEX(ant_available_a, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_A,
493 SSB_SPROM8_ANTAVAIL_A_SHIFT);
494 SPEX(ant_available_bg, SSB_SPROM8_ANTAVAIL, SSB_SPROM8_ANTAVAIL_BG,
495 SSB_SPROM8_ANTAVAIL_BG_SHIFT);
496 SPEX(maxpwr_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_MAXP_BG_MASK, 0);
497 SPEX(itssi_bg, SSB_SPROM8_MAXP_BG, SSB_SPROM8_ITSSI_BG,
498 SSB_SPROM8_ITSSI_BG_SHIFT);
499 SPEX(maxpwr_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_MAXP_A_MASK, 0);
500 SPEX(itssi_a, SSB_SPROM8_MAXP_A, SSB_SPROM8_ITSSI_A,
501 SSB_SPROM8_ITSSI_A_SHIFT);
502 SPEX(maxpwr_ah, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AH_MASK, 0);
503 SPEX(maxpwr_al, SSB_SPROM8_MAXP_AHL, SSB_SPROM8_MAXP_AL_MASK,
504 SSB_SPROM8_MAXP_AL_SHIFT);
505 SPEX(gpio0, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P0, 0);
506 SPEX(gpio1, SSB_SPROM8_GPIOA, SSB_SPROM8_GPIOA_P1,
507 SSB_SPROM8_GPIOA_P1_SHIFT);
508 SPEX(gpio2, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P2, 0);
509 SPEX(gpio3, SSB_SPROM8_GPIOB, SSB_SPROM8_GPIOB_P3,
510 SSB_SPROM8_GPIOB_P3_SHIFT);
511 SPEX(tri2g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI2G, 0);
512 SPEX(tri5g, SSB_SPROM8_TRI25G, SSB_SPROM8_TRI5G,
513 SSB_SPROM8_TRI5G_SHIFT);
514 SPEX(tri5gl, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GL, 0);
515 SPEX(tri5gh, SSB_SPROM8_TRI5GHL, SSB_SPROM8_TRI5GH,
516 SSB_SPROM8_TRI5GH_SHIFT);
517 SPEX(rxpo2g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO2G, 0);
518 SPEX(rxpo5g, SSB_SPROM8_RXPO, SSB_SPROM8_RXPO5G,
519 SSB_SPROM8_RXPO5G_SHIFT);
520 SPEX(rssismf2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMF2G, 0);
521 SPEX(rssismc2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISMC2G,
522 SSB_SPROM8_RSSISMC2G_SHIFT);
523 SPEX(rssisav2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_RSSISAV2G,
524 SSB_SPROM8_RSSISAV2G_SHIFT);
525 SPEX(bxa2g, SSB_SPROM8_RSSIPARM2G, SSB_SPROM8_BXA2G,
526 SSB_SPROM8_BXA2G_SHIFT);
527 SPEX(rssismf5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMF5G, 0);
528 SPEX(rssismc5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISMC5G,
529 SSB_SPROM8_RSSISMC5G_SHIFT);
530 SPEX(rssisav5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_RSSISAV5G,
531 SSB_SPROM8_RSSISAV5G_SHIFT);
532 SPEX(bxa5g, SSB_SPROM8_RSSIPARM5G, SSB_SPROM8_BXA5G,
533 SSB_SPROM8_BXA5G_SHIFT);
534 SPEX(pa0b0, SSB_SPROM8_PA0B0, 0xFFFF, 0);
535 SPEX(pa0b1, SSB_SPROM8_PA0B1, 0xFFFF, 0);
536 SPEX(pa0b2, SSB_SPROM8_PA0B2, 0xFFFF, 0);
537 SPEX(pa1b0, SSB_SPROM8_PA1B0, 0xFFFF, 0);
538 SPEX(pa1b1, SSB_SPROM8_PA1B1, 0xFFFF, 0);
539 SPEX(pa1b2, SSB_SPROM8_PA1B2, 0xFFFF, 0);
540 SPEX(pa1lob0, SSB_SPROM8_PA1LOB0, 0xFFFF, 0);
541 SPEX(pa1lob1, SSB_SPROM8_PA1LOB1, 0xFFFF, 0);
542 SPEX(pa1lob2, SSB_SPROM8_PA1LOB2, 0xFFFF, 0);
543 SPEX(pa1hib0, SSB_SPROM8_PA1HIB0, 0xFFFF, 0);
544 SPEX(pa1hib1, SSB_SPROM8_PA1HIB1, 0xFFFF, 0);
545 SPEX(pa1hib2, SSB_SPROM8_PA1HIB2, 0xFFFF, 0);
546 SPEX(cck2gpo, SSB_SPROM8_CCK2GPO, 0xFFFF, 0);
547 SPEX32(ofdm2gpo, SSB_SPROM8_OFDM2GPO, 0xFFFFFFFF, 0);
548 SPEX32(ofdm5glpo, SSB_SPROM8_OFDM5GLPO, 0xFFFFFFFF, 0);
549 SPEX32(ofdm5gpo, SSB_SPROM8_OFDM5GPO, 0xFFFFFFFF, 0);
550 SPEX32(ofdm5ghpo, SSB_SPROM8_OFDM5GHPO, 0xFFFFFFFF, 0);
551
552 /* Extract the antenna gain values. */
553 SPEX(antenna_gain.ghz24.a0, SSB_SPROM8_AGAIN01,
554 SSB_SPROM8_AGAIN0, SSB_SPROM8_AGAIN0_SHIFT);
555 SPEX(antenna_gain.ghz24.a1, SSB_SPROM8_AGAIN01,
556 SSB_SPROM8_AGAIN1, SSB_SPROM8_AGAIN1_SHIFT);
557 SPEX(antenna_gain.ghz24.a2, SSB_SPROM8_AGAIN23,
558 SSB_SPROM8_AGAIN2, SSB_SPROM8_AGAIN2_SHIFT);
559 SPEX(antenna_gain.ghz24.a3, SSB_SPROM8_AGAIN23,
560 SSB_SPROM8_AGAIN3, SSB_SPROM8_AGAIN3_SHIFT);
561 memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
562 sizeof(out->antenna_gain.ghz5));
563
564 /* TODO - get remaining rev 8 stuff needed */
565 }
566
567 static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
568 const u16 *in, u16 size)
569 {
570 memset(out, 0, sizeof(*out));
571
572 out->revision = in[size - 1] & 0x00FF;
573 ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
574 memset(out->et0mac, 0xFF, 6); /* preset et0 and et1 mac */
575 memset(out->et1mac, 0xFF, 6);
576 if ((bus->chip_id & 0xFF00) == 0x4400) {
577 /* Workaround: The BCM44XX chip has a stupid revision
578 * number stored in the SPROM.
579 * Always extract r1. */
580 out->revision = 1;
581 sprom_extract_r123(out, in);
582 } else if (bus->chip_id == 0x4321) {
583 /* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
584 out->revision = 4;
585 sprom_extract_r45(out, in);
586 } else {
587 switch (out->revision) {
588 case 1:
589 case 2:
590 case 3:
591 sprom_extract_r123(out, in);
592 break;
593 case 4:
594 case 5:
595 sprom_extract_r45(out, in);
596 break;
597 case 8:
598 sprom_extract_r8(out, in);
599 break;
600 default:
601 ssb_printk(KERN_WARNING PFX "Unsupported SPROM"
602 " revision %d detected. Will extract"
603 " v1\n", out->revision);
604 out->revision = 1;
605 sprom_extract_r123(out, in);
606 }
607 }
608
609 if (out->boardflags_lo == 0xFFFF)
610 out->boardflags_lo = 0; /* per specs */
611 if (out->boardflags_hi == 0xFFFF)
612 out->boardflags_hi = 0; /* per specs */
613
614 return 0;
615 }
616
617 static int ssb_pci_sprom_get(struct ssb_bus *bus,
618 struct ssb_sprom *sprom)
619 {
620 const struct ssb_sprom *fallback;
621 int err = -ENOMEM;
622 u16 *buf;
623
624 buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
625 if (!buf)
626 goto out;
627 bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
628 sprom_do_read(bus, buf);
629 err = sprom_check_crc(buf, bus->sprom_size);
630 if (err) {
631 /* try for a 440 byte SPROM - revision 4 and higher */
632 kfree(buf);
633 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
634 GFP_KERNEL);
635 if (!buf)
636 goto out;
637 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
638 sprom_do_read(bus, buf);
639 err = sprom_check_crc(buf, bus->sprom_size);
640 if (err) {
641 /* All CRC attempts failed.
642 * Maybe there is no SPROM on the device?
643 * If we have a fallback, use that. */
644 fallback = ssb_get_fallback_sprom();
645 if (fallback) {
646 memcpy(sprom, fallback, sizeof(*sprom));
647 err = 0;
648 goto out_free;
649 }
650 ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
651 " SPROM CRC (corrupt SPROM)\n");
652 }
653 }
654 err = sprom_extract(bus, sprom, buf, bus->sprom_size);
655
656 out_free:
657 kfree(buf);
658 out:
659 return err;
660 }
661
662 static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
663 struct ssb_boardinfo *bi)
664 {
665 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
666 &bi->vendor);
667 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
668 &bi->type);
669 pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
670 &bi->rev);
671 }
672
673 int ssb_pci_get_invariants(struct ssb_bus *bus,
674 struct ssb_init_invariants *iv)
675 {
676 int err;
677
678 err = ssb_pci_sprom_get(bus, &iv->sprom);
679 if (err)
680 goto out;
681 ssb_pci_get_boardinfo(bus, &iv->boardinfo);
682
683 out:
684 return err;
685 }
686
687 #ifdef CONFIG_SSB_DEBUG
688 static int ssb_pci_assert_buspower(struct ssb_bus *bus)
689 {
690 if (likely(bus->powered_up))
691 return 0;
692
693 printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
694 "while accessing PCI MMIO space\n");
695 if (bus->power_warn_count <= 10) {
696 bus->power_warn_count++;
697 dump_stack();
698 }
699
700 return -ENODEV;
701 }
702 #else /* DEBUG */
703 static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
704 {
705 return 0;
706 }
707 #endif /* DEBUG */
708
709 static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
710 {
711 struct ssb_bus *bus = dev->bus;
712
713 if (unlikely(ssb_pci_assert_buspower(bus)))
714 return 0xFF;
715 if (unlikely(bus->mapped_device != dev)) {
716 if (unlikely(ssb_pci_switch_core(bus, dev)))
717 return 0xFF;
718 }
719 return ioread8(bus->mmio + offset);
720 }
721
722 static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
723 {
724 struct ssb_bus *bus = dev->bus;
725
726 if (unlikely(ssb_pci_assert_buspower(bus)))
727 return 0xFFFF;
728 if (unlikely(bus->mapped_device != dev)) {
729 if (unlikely(ssb_pci_switch_core(bus, dev)))
730 return 0xFFFF;
731 }
732 return ioread16(bus->mmio + offset);
733 }
734
735 static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
736 {
737 struct ssb_bus *bus = dev->bus;
738
739 if (unlikely(ssb_pci_assert_buspower(bus)))
740 return 0xFFFFFFFF;
741 if (unlikely(bus->mapped_device != dev)) {
742 if (unlikely(ssb_pci_switch_core(bus, dev)))
743 return 0xFFFFFFFF;
744 }
745 return ioread32(bus->mmio + offset);
746 }
747
748 #ifdef CONFIG_SSB_BLOCKIO
749 static void ssb_pci_block_read(struct ssb_device *dev, void *buffer,
750 size_t count, u16 offset, u8 reg_width)
751 {
752 struct ssb_bus *bus = dev->bus;
753 void __iomem *addr = bus->mmio + offset;
754
755 if (unlikely(ssb_pci_assert_buspower(bus)))
756 goto error;
757 if (unlikely(bus->mapped_device != dev)) {
758 if (unlikely(ssb_pci_switch_core(bus, dev)))
759 goto error;
760 }
761 switch (reg_width) {
762 case sizeof(u8):
763 ioread8_rep(addr, buffer, count);
764 break;
765 case sizeof(u16):
766 SSB_WARN_ON(count & 1);
767 ioread16_rep(addr, buffer, count >> 1);
768 break;
769 case sizeof(u32):
770 SSB_WARN_ON(count & 3);
771 ioread32_rep(addr, buffer, count >> 2);
772 break;
773 default:
774 SSB_WARN_ON(1);
775 }
776
777 return;
778 error:
779 memset(buffer, 0xFF, count);
780 }
781 #endif /* CONFIG_SSB_BLOCKIO */
782
783 static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
784 {
785 struct ssb_bus *bus = dev->bus;
786
787 if (unlikely(ssb_pci_assert_buspower(bus)))
788 return;
789 if (unlikely(bus->mapped_device != dev)) {
790 if (unlikely(ssb_pci_switch_core(bus, dev)))
791 return;
792 }
793 iowrite8(value, bus->mmio + offset);
794 }
795
796 static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
797 {
798 struct ssb_bus *bus = dev->bus;
799
800 if (unlikely(ssb_pci_assert_buspower(bus)))
801 return;
802 if (unlikely(bus->mapped_device != dev)) {
803 if (unlikely(ssb_pci_switch_core(bus, dev)))
804 return;
805 }
806 iowrite16(value, bus->mmio + offset);
807 }
808
809 static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
810 {
811 struct ssb_bus *bus = dev->bus;
812
813 if (unlikely(ssb_pci_assert_buspower(bus)))
814 return;
815 if (unlikely(bus->mapped_device != dev)) {
816 if (unlikely(ssb_pci_switch_core(bus, dev)))
817 return;
818 }
819 iowrite32(value, bus->mmio + offset);
820 }
821
822 #ifdef CONFIG_SSB_BLOCKIO
823 static void ssb_pci_block_write(struct ssb_device *dev, const void *buffer,
824 size_t count, u16 offset, u8 reg_width)
825 {
826 struct ssb_bus *bus = dev->bus;
827 void __iomem *addr = bus->mmio + offset;
828
829 if (unlikely(ssb_pci_assert_buspower(bus)))
830 return;
831 if (unlikely(bus->mapped_device != dev)) {
832 if (unlikely(ssb_pci_switch_core(bus, dev)))
833 return;
834 }
835 switch (reg_width) {
836 case sizeof(u8):
837 iowrite8_rep(addr, buffer, count);
838 break;
839 case sizeof(u16):
840 SSB_WARN_ON(count & 1);
841 iowrite16_rep(addr, buffer, count >> 1);
842 break;
843 case sizeof(u32):
844 SSB_WARN_ON(count & 3);
845 iowrite32_rep(addr, buffer, count >> 2);
846 break;
847 default:
848 SSB_WARN_ON(1);
849 }
850 }
851 #endif /* CONFIG_SSB_BLOCKIO */
852
853 /* Not "static", as it's used in main.c */
854 const struct ssb_bus_ops ssb_pci_ops = {
855 .read8 = ssb_pci_read8,
856 .read16 = ssb_pci_read16,
857 .read32 = ssb_pci_read32,
858 .write8 = ssb_pci_write8,
859 .write16 = ssb_pci_write16,
860 .write32 = ssb_pci_write32,
861 #ifdef CONFIG_SSB_BLOCKIO
862 .block_read = ssb_pci_block_read,
863 .block_write = ssb_pci_block_write,
864 #endif
865 };
866
867 static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
868 struct device_attribute *attr,
869 char *buf)
870 {
871 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
872 struct ssb_bus *bus;
873
874 bus = ssb_pci_dev_to_bus(pdev);
875 if (!bus)
876 return -ENODEV;
877
878 return ssb_attr_sprom_show(bus, buf, sprom_do_read);
879 }
880
881 static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
882 struct device_attribute *attr,
883 const char *buf, size_t count)
884 {
885 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
886 struct ssb_bus *bus;
887
888 bus = ssb_pci_dev_to_bus(pdev);
889 if (!bus)
890 return -ENODEV;
891
892 return ssb_attr_sprom_store(bus, buf, count,
893 sprom_check_crc, sprom_do_write);
894 }
895
896 static DEVICE_ATTR(ssb_sprom, 0600,
897 ssb_pci_attr_sprom_show,
898 ssb_pci_attr_sprom_store);
899
900 void ssb_pci_exit(struct ssb_bus *bus)
901 {
902 struct pci_dev *pdev;
903
904 if (bus->bustype != SSB_BUSTYPE_PCI)
905 return;
906
907 pdev = bus->host_pci;
908 device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
909 }
910
911 int ssb_pci_init(struct ssb_bus *bus)
912 {
913 struct pci_dev *pdev;
914 int err;
915
916 if (bus->bustype != SSB_BUSTYPE_PCI)
917 return 0;
918
919 pdev = bus->host_pci;
920 mutex_init(&bus->sprom_mutex);
921 err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
922 if (err)
923 goto out;
924
925 out:
926 return err;
927 }
kernel-based virtual machine