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ssb: Add new SPROM structure while keeping the old
[net-next-2.6.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
215static u8 ssb_sprom_crc(const u16 *sprom)
216{
217 int word;
218 u8 crc = 0xFF;
219
220 for (word = 0; word < SSB_SPROMSIZE_WORDS - 1; word++) {
221 crc = ssb_crc8(crc, sprom[word] & 0x00FF);
222 crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
223 }
224 crc = ssb_crc8(crc, sprom[SPOFF(SSB_SPROM_REVISION)] & 0x00FF);
225 crc ^= 0xFF;
226
227 return crc;
228}
229
230static int sprom_check_crc(const u16 *sprom)
231{
232 u8 crc;
233 u8 expected_crc;
234 u16 tmp;
235
236 crc = ssb_sprom_crc(sprom);
237 tmp = sprom[SPOFF(SSB_SPROM_REVISION)] & SSB_SPROM_REVISION_CRC;
238 expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
239 if (crc != expected_crc)
240 return -EPROTO;
241
242 return 0;
243}
244
245static void sprom_do_read(struct ssb_bus *bus, u16 *sprom)
246{
247 int i;
248
249 for (i = 0; i < SSB_SPROMSIZE_WORDS; i++)
250 sprom[i] = readw(bus->mmio + SSB_SPROM_BASE + (i * 2));
251}
252
253static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
254{
255 struct pci_dev *pdev = bus->host_pci;
256 int i, err;
257 u32 spromctl;
258
259 ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
260 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
261 if (err)
262 goto err_ctlreg;
263 spromctl |= SSB_SPROMCTL_WE;
264 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
265 if (err)
266 goto err_ctlreg;
267 ssb_printk(KERN_NOTICE PFX "[ 0%%");
268 msleep(500);
269 for (i = 0; i < SSB_SPROMSIZE_WORDS; i++) {
270 if (i == SSB_SPROMSIZE_WORDS / 4)
271 ssb_printk("25%%");
272 else if (i == SSB_SPROMSIZE_WORDS / 2)
273 ssb_printk("50%%");
274 else if (i == (SSB_SPROMSIZE_WORDS / 4) * 3)
275 ssb_printk("75%%");
276 else if (i % 2)
277 ssb_printk(".");
278 writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
279 mmiowb();
280 msleep(20);
281 }
282 err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
283 if (err)
284 goto err_ctlreg;
285 spromctl &= ~SSB_SPROMCTL_WE;
286 err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
287 if (err)
288 goto err_ctlreg;
289 msleep(500);
290 ssb_printk("100%% ]\n");
291 ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
292
293 return 0;
294err_ctlreg:
295 ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
296 return err;
297}
298
299static void sprom_extract_r1(struct ssb_sprom_r1 *out, const u16 *in)
300{
301 int i;
302 u16 v;
303
304 SPEX(pci_spid, SSB_SPROM1_SPID, 0xFFFF, 0);
305 SPEX(pci_svid, SSB_SPROM1_SVID, 0xFFFF, 0);
306 SPEX(pci_pid, SSB_SPROM1_PID, 0xFFFF, 0);
307 for (i = 0; i < 3; i++) {
308 v = in[SPOFF(SSB_SPROM1_IL0MAC) + i];
6b9bafec 309 *(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
61e115a5
MB		 310 }
311 for (i = 0; i < 3; i++) {
312 v = in[SPOFF(SSB_SPROM1_ET0MAC) + i];
6b9bafec 313 *(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
61e115a5
MB		 314 }
315 for (i = 0; i < 3; i++) {
316 v = in[SPOFF(SSB_SPROM1_ET1MAC) + i];
6b9bafec 317 *(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
61e115a5
MB		 318 }
319 SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
320 SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
321 SSB_SPROM1_ETHPHY_ET1A_SHIFT);
322 SPEX(et0mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0M, 14);
323 SPEX(et1mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1M, 15);
324 SPEX(board_rev, SSB_SPROM1_BINF, SSB_SPROM1_BINF_BREV, 0);
325 SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
326 SSB_SPROM1_BINF_CCODE_SHIFT);
327 SPEX(antenna_a, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTA,
328 SSB_SPROM1_BINF_ANTA_SHIFT);
329 SPEX(antenna_bg, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTBG,
330 SSB_SPROM1_BINF_ANTBG_SHIFT);
331 SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
332 SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
333 SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
334 SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
335 SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
336 SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
337 SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
338 SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
339 SSB_SPROM1_GPIOA_P1_SHIFT);
340 SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
341 SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
342 SSB_SPROM1_GPIOB_P3_SHIFT);
343 SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
344 SSB_SPROM1_MAXPWR_A_SHIFT);
345 SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
346 SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
347 SSB_SPROM1_ITSSI_A_SHIFT);
348 SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
349 SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
350 SPEX(antenna_gain_a, SSB_SPROM1_AGAIN, SSB_SPROM1_AGAIN_A, 0);
351 SPEX(antenna_gain_bg, SSB_SPROM1_AGAIN, SSB_SPROM1_AGAIN_BG,
352 SSB_SPROM1_AGAIN_BG_SHIFT);
353 for (i = 0; i < 4; i++) {
354 v = in[SPOFF(SSB_SPROM1_OEM) + i];
6b9bafec 355 *(((__le16 *)out->oem) + i) = cpu_to_le16(v);
61e115a5
MB		 356 }
357}
358
359static void sprom_extract_r2(struct ssb_sprom_r2 *out, const u16 *in)
360{
361 int i;
362 u16 v;
363
364 SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
365 SPEX(maxpwr_a_hi, SSB_SPROM2_MAXP_A, SSB_SPROM2_MAXP_A_HI, 0);
366 SPEX(maxpwr_a_lo, SSB_SPROM2_MAXP_A, SSB_SPROM2_MAXP_A_LO,
367 SSB_SPROM2_MAXP_A_LO_SHIFT);
368 SPEX(pa1lob0, SSB_SPROM2_PA1LOB0, 0xFFFF, 0);
369 SPEX(pa1lob1, SSB_SPROM2_PA1LOB1, 0xFFFF, 0);
370 SPEX(pa1lob2, SSB_SPROM2_PA1LOB2, 0xFFFF, 0);
371 SPEX(pa1hib0, SSB_SPROM2_PA1HIB0, 0xFFFF, 0);
372 SPEX(pa1hib1, SSB_SPROM2_PA1HIB1, 0xFFFF, 0);
373 SPEX(pa1hib2, SSB_SPROM2_PA1HIB2, 0xFFFF, 0);
374 SPEX(ofdm_pwr_off, SSB_SPROM2_OPO, SSB_SPROM2_OPO_VALUE, 0);
375 for (i = 0; i < 4; i++) {
376 v = in[SPOFF(SSB_SPROM2_CCODE) + i];
6b9bafec 377 *(((__le16 *)out->country_str) + i) = cpu_to_le16(v);
61e115a5
MB		 378 }
379}
380
381static void sprom_extract_r3(struct ssb_sprom_r3 *out, const u16 *in)
382{
383 out->ofdmapo = (in[SPOFF(SSB_SPROM3_OFDMAPO) + 0] & 0xFF00) >> 8;
384 out->ofdmapo |= (in[SPOFF(SSB_SPROM3_OFDMAPO) + 0] & 0x00FF) << 8;
385 out->ofdmapo <<= 16;
386 out->ofdmapo |= (in[SPOFF(SSB_SPROM3_OFDMAPO) + 1] & 0xFF00) >> 8;
387 out->ofdmapo |= (in[SPOFF(SSB_SPROM3_OFDMAPO) + 1] & 0x00FF) << 8;
388
389 out->ofdmalpo = (in[SPOFF(SSB_SPROM3_OFDMALPO) + 0] & 0xFF00) >> 8;
390 out->ofdmalpo |= (in[SPOFF(SSB_SPROM3_OFDMALPO) + 0] & 0x00FF) << 8;
391 out->ofdmalpo <<= 16;
392 out->ofdmalpo |= (in[SPOFF(SSB_SPROM3_OFDMALPO) + 1] & 0xFF00) >> 8;
393 out->ofdmalpo |= (in[SPOFF(SSB_SPROM3_OFDMALPO) + 1] & 0x00FF) << 8;
394
395 out->ofdmahpo = (in[SPOFF(SSB_SPROM3_OFDMAHPO) + 0] & 0xFF00) >> 8;
396 out->ofdmahpo |= (in[SPOFF(SSB_SPROM3_OFDMAHPO) + 0] & 0x00FF) << 8;
397 out->ofdmahpo <<= 16;
398 out->ofdmahpo |= (in[SPOFF(SSB_SPROM3_OFDMAHPO) + 1] & 0xFF00) >> 8;
399 out->ofdmahpo |= (in[SPOFF(SSB_SPROM3_OFDMAHPO) + 1] & 0x00FF) << 8;
400
401 SPEX(gpioldc_on_cnt, SSB_SPROM3_GPIOLDC, SSB_SPROM3_GPIOLDC_ON,
402 SSB_SPROM3_GPIOLDC_ON_SHIFT);
403 SPEX(gpioldc_off_cnt, SSB_SPROM3_GPIOLDC, SSB_SPROM3_GPIOLDC_OFF,
404 SSB_SPROM3_GPIOLDC_OFF_SHIFT);
405 SPEX(cckpo_1M, SSB_SPROM3_CCKPO, SSB_SPROM3_CCKPO_1M, 0);
406 SPEX(cckpo_2M, SSB_SPROM3_CCKPO, SSB_SPROM3_CCKPO_2M,
407 SSB_SPROM3_CCKPO_2M_SHIFT);
408 SPEX(cckpo_55M, SSB_SPROM3_CCKPO, SSB_SPROM3_CCKPO_55M,
409 SSB_SPROM3_CCKPO_55M_SHIFT);
410 SPEX(cckpo_11M, SSB_SPROM3_CCKPO, SSB_SPROM3_CCKPO_11M,
411 SSB_SPROM3_CCKPO_11M_SHIFT);
412
413 out->ofdmgpo = (in[SPOFF(SSB_SPROM3_OFDMGPO) + 0] & 0xFF00) >> 8;
414 out->ofdmgpo |= (in[SPOFF(SSB_SPROM3_OFDMGPO) + 0] & 0x00FF) << 8;
415 out->ofdmgpo <<= 16;
416 out->ofdmgpo |= (in[SPOFF(SSB_SPROM3_OFDMGPO) + 1] & 0xFF00) >> 8;
417 out->ofdmgpo |= (in[SPOFF(SSB_SPROM3_OFDMGPO) + 1] & 0x00FF) << 8;
418}
419
420static int sprom_extract(struct ssb_bus *bus,
421 struct ssb_sprom *out, const u16 *in)
422{
423 memset(out, 0, sizeof(*out));
424
425 SPEX(revision, SSB_SPROM_REVISION, SSB_SPROM_REVISION_REV, 0);
61e115a5
MB		 426
427 if ((bus->chip_id & 0xFF00) == 0x4400) {
428 /* Workaround: The BCM44XX chip has a stupid revision
429 * number stored in the SPROM.
430 * Always extract r1. */
431 sprom_extract_r1(&out->r1, in);
432 } else {
433 if (out->revision == 0)
434 goto unsupported;
435 if (out->revision >= 1 && out->revision <= 3)
436 sprom_extract_r1(&out->r1, in);
437 if (out->revision >= 2 && out->revision <= 3)
438 sprom_extract_r2(&out->r2, in);
439 if (out->revision == 3)
440 sprom_extract_r3(&out->r3, in);
441 if (out->revision >= 4)
442 goto unsupported;
443 }
444
445 return 0;
446unsupported:
447 ssb_printk(KERN_WARNING PFX "Unsupported SPROM revision %d "
448 "detected. Will extract v1\n", out->revision);
449 sprom_extract_r1(&out->r1, in);
450 return 0;
451}
452
453static int ssb_pci_sprom_get(struct ssb_bus *bus,
454 struct ssb_sprom *sprom)
455{
456 int err = -ENOMEM;
457 u16 *buf;
458
459 buf = kcalloc(SSB_SPROMSIZE_WORDS, sizeof(u16), GFP_KERNEL);
460 if (!buf)
461 goto out;
462 sprom_do_read(bus, buf);
463 err = sprom_check_crc(buf);
464 if (err) {
465 ssb_printk(KERN_WARNING PFX
466 "WARNING: Invalid SPROM CRC (corrupt SPROM)\n");
467 }
468 err = sprom_extract(bus, sprom, buf);
469
470 kfree(buf);
471out:
472 return err;
473}
474
475static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
476 struct ssb_boardinfo *bi)
477{
478 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
479 &bi->vendor);
480 pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
481 &bi->type);
482 pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
483 &bi->rev);
484}
485
486int ssb_pci_get_invariants(struct ssb_bus *bus,
487 struct ssb_init_invariants *iv)
488{
489 int err;
490
491 err = ssb_pci_sprom_get(bus, &iv->sprom);
492 if (err)
493 goto out;
494 ssb_pci_get_boardinfo(bus, &iv->boardinfo);
495
496out:
497 return err;
498}
499
500#ifdef CONFIG_SSB_DEBUG
501static int ssb_pci_assert_buspower(struct ssb_bus *bus)
502{
503 if (likely(bus->powered_up))
504 return 0;
505
506 printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
507 "while accessing PCI MMIO space\n");
508 if (bus->power_warn_count <= 10) {
509 bus->power_warn_count++;
510 dump_stack();
511 }
512
513 return -ENODEV;
514}
515#else /* DEBUG */
516static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
517{
518 return 0;
519}
520#endif /* DEBUG */
521
522static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
523{
524 struct ssb_bus *bus = dev->bus;
525
526 if (unlikely(ssb_pci_assert_buspower(bus)))
527 return 0xFFFF;
528 if (unlikely(bus->mapped_device != dev)) {
529 if (unlikely(ssb_pci_switch_core(bus, dev)))
530 return 0xFFFF;
531 }
4b402c65 532 return ioread16(bus->mmio + offset);
61e115a5
MB		 533}
534
535static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
536{
537 struct ssb_bus *bus = dev->bus;
538
539 if (unlikely(ssb_pci_assert_buspower(bus)))
540 return 0xFFFFFFFF;
541 if (unlikely(bus->mapped_device != dev)) {
542 if (unlikely(ssb_pci_switch_core(bus, dev)))
543 return 0xFFFFFFFF;
544 }
4b402c65 545 return ioread32(bus->mmio + offset);
61e115a5
MB		 546}
547
548static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
549{
550 struct ssb_bus *bus = dev->bus;
551
552 if (unlikely(ssb_pci_assert_buspower(bus)))
553 return;
554 if (unlikely(bus->mapped_device != dev)) {
555 if (unlikely(ssb_pci_switch_core(bus, dev)))
556 return;
557 }
4b402c65 558 iowrite16(value, bus->mmio + offset);
61e115a5
MB		 559}
560
561static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
562{
563 struct ssb_bus *bus = dev->bus;
564
565 if (unlikely(ssb_pci_assert_buspower(bus)))
566 return;
567 if (unlikely(bus->mapped_device != dev)) {
568 if (unlikely(ssb_pci_switch_core(bus, dev)))
569 return;
570 }
4b402c65 571 iowrite32(value, bus->mmio + offset);
61e115a5
MB		 572}
573
574/* Not "static", as it's used in main.c */
575const struct ssb_bus_ops ssb_pci_ops = {
576 .read16 = ssb_pci_read16,
577 .read32 = ssb_pci_read32,
578 .write16 = ssb_pci_write16,
579 .write32 = ssb_pci_write32,
580};
581
582static int sprom2hex(const u16 *sprom, char *buf, size_t buf_len)
583{
584 int i, pos = 0;
585
586 for (i = 0; i < SSB_SPROMSIZE_WORDS; i++) {
587 pos += snprintf(buf + pos, buf_len - pos - 1,
588 "%04X", swab16(sprom[i]) & 0xFFFF);
589 }
590 pos += snprintf(buf + pos, buf_len - pos - 1, "\n");
591
592 return pos + 1;
593}
594
595static int hex2sprom(u16 *sprom, const char *dump, size_t len)
596{
597 char tmp[5] = { 0 };
598 int cnt = 0;
599 unsigned long parsed;
600
601 if (len < SSB_SPROMSIZE_BYTES * 2)
602 return -EINVAL;
603
604 while (cnt < SSB_SPROMSIZE_WORDS) {
605 memcpy(tmp, dump, 4);
606 dump += 4;
607 parsed = simple_strtoul(tmp, NULL, 16);
608 sprom[cnt++] = swab16((u16)parsed);
609 }
610
611 return 0;
612}
613
614static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
615 struct device_attribute *attr,
616 char *buf)
617{
618 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
619 struct ssb_bus *bus;
620 u16 *sprom;
621 int err = -ENODEV;
622 ssize_t count = 0;
623
624 bus = ssb_pci_dev_to_bus(pdev);
625 if (!bus)
626 goto out;
627 err = -ENOMEM;
628 sprom = kcalloc(SSB_SPROMSIZE_WORDS, sizeof(u16), GFP_KERNEL);
629 if (!sprom)
630 goto out;
631
632 /* Use interruptible locking, as the SPROM write might
633 * be holding the lock for several seconds. So allow userspace
634 * to cancel operation. */
635 err = -ERESTARTSYS;
636 if (mutex_lock_interruptible(&bus->pci_sprom_mutex))
637 goto out_kfree;
638 sprom_do_read(bus, sprom);
639 mutex_unlock(&bus->pci_sprom_mutex);
640
641 count = sprom2hex(sprom, buf, PAGE_SIZE);
642 err = 0;
643
644out_kfree:
645 kfree(sprom);
646out:
647 return err ? err : count;
648}
649
650static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
651 struct device_attribute *attr,
652 const char *buf, size_t count)
653{
654 struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
655 struct ssb_bus *bus;
656 u16 *sprom;
657 int res = 0, err = -ENODEV;
658
659 bus = ssb_pci_dev_to_bus(pdev);
660 if (!bus)
661 goto out;
662 err = -ENOMEM;
663 sprom = kcalloc(SSB_SPROMSIZE_WORDS, sizeof(u16), GFP_KERNEL);
664 if (!sprom)
665 goto out;
666 err = hex2sprom(sprom, buf, count);
667 if (err) {
668 err = -EINVAL;
669 goto out_kfree;
670 }
671 err = sprom_check_crc(sprom);
672 if (err) {
673 err = -EINVAL;
674 goto out_kfree;
675 }
676
677 /* Use interruptible locking, as the SPROM write might
678 * be holding the lock for several seconds. So allow userspace
679 * to cancel operation. */
680 err = -ERESTARTSYS;
681 if (mutex_lock_interruptible(&bus->pci_sprom_mutex))
682 goto out_kfree;
683 err = ssb_devices_freeze(bus);
684 if (err == -EOPNOTSUPP) {
685 ssb_printk(KERN_ERR PFX "SPROM write: Could not freeze devices. "
686 "No suspend support. Is CONFIG_PM enabled?\n");
687 goto out_unlock;
688 }
689 if (err) {
690 ssb_printk(KERN_ERR PFX "SPROM write: Could not freeze all devices\n");
691 goto out_unlock;
692 }
693 res = sprom_do_write(bus, sprom);
694 err = ssb_devices_thaw(bus);
695 if (err)
696 ssb_printk(KERN_ERR PFX "SPROM write: Could not thaw all devices\n");
697out_unlock:
698 mutex_unlock(&bus->pci_sprom_mutex);
699out_kfree:
700 kfree(sprom);
701out:
702 if (res)
703 return res;
704 return err ? err : count;
705}
706
707static DEVICE_ATTR(ssb_sprom, 0600,
708 ssb_pci_attr_sprom_show,
709 ssb_pci_attr_sprom_store);
710
711void ssb_pci_exit(struct ssb_bus *bus)
712{
713 struct pci_dev *pdev;
714
715 if (bus->bustype != SSB_BUSTYPE_PCI)
716 return;
717
718 pdev = bus->host_pci;
719 device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
720}
721
722int ssb_pci_init(struct ssb_bus *bus)
723{
724 struct pci_dev *pdev;
725 int err;
726
727 if (bus->bustype != SSB_BUSTYPE_PCI)
728 return 0;
729
730 pdev = bus->host_pci;
731 mutex_init(&bus->pci_sprom_mutex);
732 err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
733 if (err)
734 goto out;
735
736out:
737 return err;
738}
Clone of davem's net-next-2.6 tree