]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/ssb/pci.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
drivers/net/wireless/iwlwifi/iwl-3945.h: correct CONFIG_IWL4965_LEDS typo
[mirror_ubuntu-artful-kernel.git] / drivers / ssb / pci.c
CommitLineData
61e115a5
MB		 1/*
2 * Sonics Silicon Backplane PCI-Hostbus related functions.
3 *
4 * Copyright (C) 2005-2006 Michael Buesch <mb@bu3sch.de>
5 * Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
6 * Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
7 * Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
8 * Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
9 *
10 * Derived from the Broadcom 4400 device driver.
11 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
12 * Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
13 * Copyright (C) 2006 Broadcom Corporation.
14 *
15 * Licensed under the GNU/GPL. See COPYING for details.
16 */
17
18#include <linux/ssb/ssb.h>
19#include <linux/ssb/ssb_regs.h>
20#include <linux/pci.h>
21#include <linux/delay.h>
22
23#include "ssb_private.h"
24
25
26/* Define the following to 1 to enable a printk on each coreswitch. */
27#define SSB_VERBOSE_PCICORESWITCH_DEBUG 0
28
29
30/* Lowlevel coreswitching */
31int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
32{
33 int err;
34 int attempts = 0;
35 u32 cur_core;
36
37 while (1) {
38 err = pci_write_config_dword(bus->host_pci, SSB_BAR0_WIN,
39 (coreidx * SSB_CORE_SIZE)
40 + SSB_ENUM_BASE);
41 if (err)
42 goto error;
43 err = pci_read_config_dword(bus->host_pci, SSB_BAR0_WIN,
44 &cur_core);
45 if (err)
46 goto error;
47 cur_core = (cur_core - SSB_ENUM_BASE)
48 / SSB_CORE_SIZE;
49 if (cur_core == coreidx)
50 break;
51
52 if (attempts++ > SSB_BAR0_MAX_RETRIES)
53 goto error;
54 udelay(10);
55 }
56 return 0;
57error:
58 ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
59 return -ENODEV;
60}
61
62int ssb_pci_switch_core(struct ssb_bus *bus,
63 struct ssb_device *dev)
64{
65 int err;
66 unsigned long flags;
67
68#if SSB_VERBOSE_PCICORESWITCH_DEBUG
69 ssb_printk(KERN_INFO PFX
70 "Switching to %s core, index %d\n",
71 ssb_core_name(dev->id.coreid),
72 dev->core_index);
73#endif
74
75 spin_lock_irqsave(&bus->bar_lock, flags);
76 err = ssb_pci_switch_coreidx(bus, dev->core_index);
77 if (!err)
78 bus->mapped_device = dev;
79 spin_unlock_irqrestore(&bus->bar_lock, flags);
80
81 return err;
82}
83
84/* Enable/disable the on board crystal oscillator and/or PLL. */
85int ssb_pci_xtal(struct ssb_bus *bus, u32 what, int turn_on)
86{
87 int err;
88 u32 in, out, outenable;
89 u16 pci_status;
90
91 if (bus->bustype != SSB_BUSTYPE_PCI)
92 return 0;
93
94 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_IN, &in);
95 if (err)
96 goto err_pci;
97 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT, &out);
98 if (err)
99 goto err_pci;
100 err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, &outenable);
101 if (err)
102 goto err_pci;
103
104 outenable |= what;
105
106 if (turn_on) {
107 /* Avoid glitching the clock if GPRS is already using it.
108 * We can't actually read the state of the PLLPD so we infer it
109 * by the value of XTAL_PU which *is* readable via gpioin.
110 */
111 if (!(in & SSB_GPIO_XTAL)) {
112 if (what & SSB_GPIO_XTAL) {
113 /* Turn the crystal on */
114 out |= SSB_GPIO_XTAL;
115 if (what & SSB_GPIO_PLL)
116 out |= SSB_GPIO_PLL;
117 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
118 if (err)
119 goto err_pci;
120 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE,
121 outenable);
122 if (err)
123 goto err_pci;
124 msleep(1);
125 }
126 if (what & SSB_GPIO_PLL) {
127 /* Turn the PLL on */
128 out &= ~SSB_GPIO_PLL;
129 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
130 if (err)
131 goto err_pci;
132 msleep(5);
133 }
134 }
135
136 err = pci_read_config_word(bus->host_pci, PCI_STATUS, &pci_status);
137 if (err)
138 goto err_pci;
139 pci_status &= ~PCI_STATUS_SIG_TARGET_ABORT;
140 err = pci_write_config_word(bus->host_pci, PCI_STATUS, pci_status);
141 if (err)
142 goto err_pci;
143 } else {
144 if (what & SSB_GPIO_XTAL) {
145 /* Turn the crystal off */
146 out &= ~SSB_GPIO_XTAL;
147 }
148 if (what & SSB_GPIO_PLL) {
149 /* Turn the PLL off */
150 out |= SSB_GPIO_PLL;
151 }
152 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
153 if (err)
154 goto err_pci;
155 err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, outenable);
156 if (err)
157 goto err_pci;
158 }
159
160out:
161 return err;
162
163err_pci:
164 printk(KERN_ERR PFX "Error: ssb_pci_xtal() could not access PCI config space!\n");
165 err = -EBUSY;
166 goto out;
167}
168
169/* Get the word-offset for a SSB_SPROM_XXX define. */
170#define SPOFF(offset) (((offset) - SSB_SPROM_BASE) / sizeof(u16))
171/* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
172#define SPEX(_outvar, _offset, _mask, _shift) \
173 out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
174
175static inline u8 ssb_crc8(u8 crc, u8 data)
176{
177 /* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */
178 static const u8 t[] = {
179 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
180 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
181 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
182 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
183 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
184 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
185 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
186 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
187 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
188 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
189 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
190 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
191 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
192 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
193 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
194 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
195 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
196 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
197 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
198 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
199 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
200 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
201 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
202 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
203 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
204 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
205 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
206 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
207 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
208 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
209 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
210 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
211 };
212 return t[crc ^ data];
213}
214
c272ef44 215static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
61e115a5
MB		 216{
217 int word;
218 u8 crc = 0xFF;
219
c272ef44 220 for (word = 0; word < size - 1; word++) {
61e115a5
MB		 221 crc = ssb_crc8(crc, sprom[word] & 0x00FF);
222 crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
223 }
c272ef44 224 crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
61e115a5
MB		 225 crc ^= 0xFF;
226
227 return crc;
228}
229
e7ec2e32 230static int sprom_check_crc(const u16 *sprom, size_t size)
61e115a5
MB		 231{
232 u8 crc;
233 u8 expected_crc;
234 u16 tmp;
235
c272ef44
LF		 236 crc = ssb_sprom_crc(sprom, size);
237 tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
61e115a5
MB		 238 expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
239 if (crc != expected_crc)
240 return -EPROTO;
241
242 return 0;
243}
244
e7ec2e32 245static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
61e115a5
MB		 246{
247 int i;
248
c272ef44 249 for (i = 0; i < bus->sprom_size; i++)
e861b98d 250 sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
e7ec2e32
MB		 251
252 return 0;
61e115a5
MB		 253}
254
255static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
256{
257 struct pci_dev *pdev = bus->host_pci;
258 int i, err;
259 u32 spromctl;
c272ef44 260 u16 size = bus->sprom_size;
61e115a5
MB		 261
262 ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
263 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
264 if (err)
265 goto err_ctlreg;
266 spromctl |= SSB_SPROMCTL_WE;
267 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
268 if (err)
269 goto err_ctlreg;
270 ssb_printk(KERN_NOTICE PFX "[ 0%%");
271 msleep(500);
c272ef44
LF		 272 for (i = 0; i < size; i++) {
273 if (i == size / 4)
61e115a5 274 ssb_printk("25%%");
c272ef44 275 else if (i == size / 2)
61e115a5 276 ssb_printk("50%%");
c272ef44 277 else if (i == (size * 3) / 4)
61e115a5
MB		 278 ssb_printk("75%%");
279 else if (i % 2)
280 ssb_printk(".");
281 writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
282 mmiowb();
283 msleep(20);
284 }
285 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
286 if (err)
287 goto err_ctlreg;
288 spromctl &= ~SSB_SPROMCTL_WE;
289 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
290 if (err)
291 goto err_ctlreg;
292 msleep(500);
293 ssb_printk("100%% ]\n");
294 ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
295
296 return 0;
297err_ctlreg:
298 ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
299 return err;
300}
301
e861b98d
MB		 302static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
303 u16 mask, u16 shift)
304{
305 u16 v;
306 u8 gain;
307
308 v = in[SPOFF(SSB_SPROM1_AGAIN)];
309 gain = (v & mask) >> shift;
310 if (gain == 0xFF)
311 gain = 2; /* If unset use 2dBm */
312 if (sprom_revision == 1) {
313 /* Convert to Q5.2 */
314 gain <<= 2;
315 } else {
316 /* Q5.2 Fractional part is stored in 0xC0 */
317 gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
318 }
319
320 return (s8)gain;
321}
322
c272ef44 323static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
61e115a5
MB		 324{
325 int i;
326 u16 v;
e861b98d 327 s8 gain;
c272ef44 328 u16 loc[3];
61e115a5 329
c272ef44
LF		 330 if (out->revision == 3) { /* rev 3 moved MAC */
331 loc[0] = SSB_SPROM3_IL0MAC;
332 loc[1] = SSB_SPROM3_ET0MAC;
333 loc[2] = SSB_SPROM3_ET1MAC;
334 } else {
335 loc[0] = SSB_SPROM1_IL0MAC;
336 loc[1] = SSB_SPROM1_ET0MAC;
337 loc[2] = SSB_SPROM1_ET1MAC;
338 }
339 for (i = 0; i < 3; i++) {
340 v = in[SPOFF(loc[0]) + i];
341 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
342 }
343 for (i = 0; i < 3; i++) {
344 v = in[SPOFF(loc[1]) + i];
345 *(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
346 }
347 for (i = 0; i < 3; i++) {
348 v = in[SPOFF(loc[2]) + i];
349 *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
61e115a5 350 }
c272ef44
LF		 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);
e861b98d
MB		 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);
c272ef44
LF		 357 SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
358 SSB_SPROM1_BINF_CCODE_SHIFT);
e861b98d
MB		 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);
c272ef44
LF		 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);
af4b7450
MB		 382 if (out->revision >= 2)
383 SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
e861b98d
MB		 384
385 /* Extract the antenna gain values. */
386 gain = r123_extract_antgain(out->revision, in,
387 SSB_SPROM1_AGAIN_BG,
388 SSB_SPROM1_AGAIN_BG_SHIFT);
389 out->antenna_gain.ghz24.a0 = gain;
390 out->antenna_gain.ghz24.a1 = gain;
391 out->antenna_gain.ghz24.a2 = gain;
392 out->antenna_gain.ghz24.a3 = gain;
393 gain = r123_extract_antgain(out->revision, in,
394 SSB_SPROM1_AGAIN_A,
395 SSB_SPROM1_AGAIN_A_SHIFT);
396 out->antenna_gain.ghz5.a0 = gain;
397 out->antenna_gain.ghz5.a1 = gain;
398 out->antenna_gain.ghz5.a2 = gain;
399 out->antenna_gain.ghz5.a3 = gain;
61e115a5
MB		 400}
401
c272ef44 402static void sprom_extract_r4(struct ssb_sprom *out, const u16 *in)
61e115a5 403{
c272ef44
LF		 404 int i;
405 u16 v;
406
d3c319f9 407 /* extract the equivalent of the r1 variables */
c272ef44
LF		 408 for (i = 0; i < 3; i++) {
409 v = in[SPOFF(SSB_SPROM4_IL0MAC) + i];
410 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
411 }
412 for (i = 0; i < 3; i++) {
413 v = in[SPOFF(SSB_SPROM4_ET0MAC) + i];
414 *(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
415 }
416 for (i = 0; i < 3; i++) {
417 v = in[SPOFF(SSB_SPROM4_ET1MAC) + i];
418 *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
419 }
420 SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
421 SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
422 SSB_SPROM4_ETHPHY_ET1A_SHIFT);
423 SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
424 SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
af4b7450 425 SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
e861b98d
MB		 426 SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
427 SSB_SPROM4_ANTAVAIL_A_SHIFT);
428 SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
429 SSB_SPROM4_ANTAVAIL_BG_SHIFT);
d3c319f9
LF		 430 SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
431 SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
432 SSB_SPROM4_ITSSI_BG_SHIFT);
433 SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
434 SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
435 SSB_SPROM4_ITSSI_A_SHIFT);
436 SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
437 SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
438 SSB_SPROM4_GPIOA_P1_SHIFT);
439 SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
440 SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
441 SSB_SPROM4_GPIOB_P3_SHIFT);
e861b98d
MB		 442
443 /* Extract the antenna gain values. */
444 SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
445 SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
446 SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
447 SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
448 SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
449 SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
450 SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
451 SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
452 memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
453 sizeof(out->antenna_gain.ghz5));
454
c272ef44 455 /* TODO - get remaining rev 4 stuff needed */
61e115a5
MB		 456}
457
c272ef44
LF		 458static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
459 const u16 *in, u16 size)
61e115a5
MB		 460{
461 memset(out, 0, sizeof(*out));
462
c272ef44 463 out->revision = in[size - 1] & 0x00FF;
e861b98d 464 ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
61e115a5
MB		 465 if ((bus->chip_id & 0xFF00) == 0x4400) {
466 /* Workaround: The BCM44XX chip has a stupid revision
467 * number stored in the SPROM.
468 * Always extract r1. */
c272ef44
LF		 469 out->revision = 1;
470 sprom_extract_r123(out, in);
c272ef44
LF		 471 } else if (bus->chip_id == 0x4321) {
472 /* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
473 out->revision = 4;
474 sprom_extract_r4(out, in);
61e115a5
MB		 475 } else {
476 if (out->revision == 0)
477 goto unsupported;
c272ef44
LF		 478 if (out->revision >= 1 && out->revision <= 3) {
479 sprom_extract_r123(out, in);
c272ef44
LF		 480 }
481 if (out->revision == 4)
482 sprom_extract_r4(out, in);
483 if (out->revision >= 5)
61e115a5
MB		 484 goto unsupported;
485 }
486
487 return 0;
488unsupported:
489 ssb_printk(KERN_WARNING PFX "Unsupported SPROM revision %d "
490 "detected. Will extract v1\n", out->revision);
d3c319f9 491 sprom_extract_r123(out, in);
61e115a5
MB		 492 return 0;
493}
494
495static int ssb_pci_sprom_get(struct ssb_bus *bus,
496 struct ssb_sprom *sprom)
497{
498 int err = -ENOMEM;
499 u16 *buf;
500
c272ef44 501 buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
61e115a5
MB		 502 if (!buf)
503 goto out;
c272ef44 504 bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
61e115a5 505 sprom_do_read(bus, buf);
c272ef44 506 err = sprom_check_crc(buf, bus->sprom_size);
61e115a5 507 if (err) {
c272ef44 508 /* check for rev 4 sprom - has special signature */
e861b98d 509 if (buf[32] == 0x5372) {
c272ef44
LF		 510 kfree(buf);
511 buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
512 GFP_KERNEL);
513 if (!buf)
514 goto out;
515 bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
516 sprom_do_read(bus, buf);
517 err = sprom_check_crc(buf, bus->sprom_size);
518 }
519 if (err)
520 ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
521 " SPROM CRC (corrupt SPROM)\n");
61e115a5 522 }
c272ef44 523 err = sprom_extract(bus, sprom, buf, bus->sprom_size);
61e115a5
MB		 524
525 kfree(buf);
526out:
527 return err;
528}
529
530static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
531 struct ssb_boardinfo *bi)
532{
533 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
534 &bi->vendor);
535 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
536 &bi->type);
537 pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
538 &bi->rev);
539}
540
541int ssb_pci_get_invariants(struct ssb_bus *bus,
542 struct ssb_init_invariants *iv)
543{
544 int err;
545
546 err = ssb_pci_sprom_get(bus, &iv->sprom);
547 if (err)
548 goto out;
549 ssb_pci_get_boardinfo(bus, &iv->boardinfo);
550
551out:
552 return err;
553}
554
555#ifdef CONFIG_SSB_DEBUG
556static int ssb_pci_assert_buspower(struct ssb_bus *bus)
557{
558 if (likely(bus->powered_up))
559 return 0;
560
561 printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
562 "while accessing PCI MMIO space\n");
563 if (bus->power_warn_count <= 10) {
564 bus->power_warn_count++;
565 dump_stack();
566 }
567
568 return -ENODEV;
569}
570#else /* DEBUG */
571static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
572{
573 return 0;
574}
575#endif /* DEBUG */
576
ffc7689d
MB		 577static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
578{
579 struct ssb_bus *bus = dev->bus;
580
581 if (unlikely(ssb_pci_assert_buspower(bus)))
582 return 0xFF;
583 if (unlikely(bus->mapped_device != dev)) {
584 if (unlikely(ssb_pci_switch_core(bus, dev)))
585 return 0xFF;
586 }
587 return ioread8(bus->mmio + offset);
588}
589
61e115a5
MB		 590static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
591{
592 struct ssb_bus *bus = dev->bus;
593
594 if (unlikely(ssb_pci_assert_buspower(bus)))
595 return 0xFFFF;
596 if (unlikely(bus->mapped_device != dev)) {
597 if (unlikely(ssb_pci_switch_core(bus, dev)))
598 return 0xFFFF;
599 }
4b402c65 600 return ioread16(bus->mmio + offset);
61e115a5
MB		 601}
602
603static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
604{
605 struct ssb_bus *bus = dev->bus;
606
607 if (unlikely(ssb_pci_assert_buspower(bus)))
608 return 0xFFFFFFFF;
609 if (unlikely(bus->mapped_device != dev)) {
610 if (unlikely(ssb_pci_switch_core(bus, dev)))
611 return 0xFFFFFFFF;
612 }
4b402c65 613 return ioread32(bus->mmio + offset);
61e115a5
MB		 614}
615
ffc7689d
MB		 616static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
617{
618 struct ssb_bus *bus = dev->bus;
619
620 if (unlikely(ssb_pci_assert_buspower(bus)))
621 return;
622 if (unlikely(bus->mapped_device != dev)) {
623 if (unlikely(ssb_pci_switch_core(bus, dev)))
624 return;
625 }
626 iowrite8(value, bus->mmio + offset);
627}
628
61e115a5
MB		 629static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
630{
631 struct ssb_bus *bus = dev->bus;
632
633 if (unlikely(ssb_pci_assert_buspower(bus)))
634 return;
635 if (unlikely(bus->mapped_device != dev)) {
636 if (unlikely(ssb_pci_switch_core(bus, dev)))
637 return;
638 }
4b402c65 639 iowrite16(value, bus->mmio + offset);
61e115a5
MB		 640}
641
642static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
643{
644 struct ssb_bus *bus = dev->bus;
645
646 if (unlikely(ssb_pci_assert_buspower(bus)))
647 return;
648 if (unlikely(bus->mapped_device != dev)) {
649 if (unlikely(ssb_pci_switch_core(bus, dev)))
650 return;
651 }
4b402c65 652 iowrite32(value, bus->mmio + offset);
61e115a5
MB		 653}
654
655/* Not "static", as it's used in main.c */
656const struct ssb_bus_ops ssb_pci_ops = {
ffc7689d 657 .read8 = ssb_pci_read8,
61e115a5
MB		 658 .read16 = ssb_pci_read16,
659 .read32 = ssb_pci_read32,
ffc7689d 660 .write8 = ssb_pci_write8,
61e115a5
MB		 661 .write16 = ssb_pci_write16,
662 .write32 = ssb_pci_write32,
663};
664
61e115a5
MB		 665static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
666 struct device_attribute *attr,
667 char *buf)
668{
669 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
670 struct ssb_bus *bus;
61e115a5
MB		 671
672 bus = ssb_pci_dev_to_bus(pdev);
673 if (!bus)
e7ec2e32 674 return -ENODEV;
61e115a5 675
e7ec2e32 676 return ssb_attr_sprom_show(bus, buf, sprom_do_read);
61e115a5
MB		 677}
678
679static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
680 struct device_attribute *attr,
681 const char *buf, size_t count)
682{
683 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
684 struct ssb_bus *bus;
61e115a5
MB		 685
686 bus = ssb_pci_dev_to_bus(pdev);
687 if (!bus)
e7ec2e32 688 return -ENODEV;
61e115a5 689
e7ec2e32
MB		 690 return ssb_attr_sprom_store(bus, buf, count,
691 sprom_check_crc, sprom_do_write);
61e115a5
MB		 692}
693
694static DEVICE_ATTR(ssb_sprom, 0600,
695 ssb_pci_attr_sprom_show,
696 ssb_pci_attr_sprom_store);
697
698void ssb_pci_exit(struct ssb_bus *bus)
699{
700 struct pci_dev *pdev;
701
702 if (bus->bustype != SSB_BUSTYPE_PCI)
703 return;
704
705 pdev = bus->host_pci;
706 device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
707}
708
709int ssb_pci_init(struct ssb_bus *bus)
710{
711 struct pci_dev *pdev;
712 int err;
713
714 if (bus->bustype != SSB_BUSTYPE_PCI)
715 return 0;
716
717 pdev = bus->host_pci;
e7ec2e32 718 mutex_init(&bus->sprom_mutex);
61e115a5
MB		 719 err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
720 if (err)
721 goto out;
722
723out:
724 return err;
725}
Ubuntu Artful kernel mirror