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1/*
2
3 Broadcom B43 wireless driver
4 IEEE 802.11n HT-PHY support
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
19 Boston, MA 02110-1301, USA.
20
21*/
22
23#include <linux/slab.h>
24
25#include "b43.h"
26#include "phy_ht.h"
27#include "tables_phy_ht.h"
28#include "radio_2059.h"
29#include "main.h"
30
31/**************************************************
32 * Radio 2059.
33 **************************************************/
34
35static void b43_radio_2059_channel_setup(struct b43_wldev *dev,
36 const struct b43_phy_ht_channeltab_e_radio2059 *e)
37{
38 u8 i;
39 u16 routing;
40
41 b43_radio_write(dev, 0x16, e->radio_syn16);
42 b43_radio_write(dev, 0x17, e->radio_syn17);
43 b43_radio_write(dev, 0x22, e->radio_syn22);
44 b43_radio_write(dev, 0x25, e->radio_syn25);
45 b43_radio_write(dev, 0x27, e->radio_syn27);
46 b43_radio_write(dev, 0x28, e->radio_syn28);
47 b43_radio_write(dev, 0x29, e->radio_syn29);
48 b43_radio_write(dev, 0x2c, e->radio_syn2c);
49 b43_radio_write(dev, 0x2d, e->radio_syn2d);
50 b43_radio_write(dev, 0x37, e->radio_syn37);
51 b43_radio_write(dev, 0x41, e->radio_syn41);
52 b43_radio_write(dev, 0x43, e->radio_syn43);
53 b43_radio_write(dev, 0x47, e->radio_syn47);
54 b43_radio_write(dev, 0x4a, e->radio_syn4a);
55 b43_radio_write(dev, 0x58, e->radio_syn58);
56 b43_radio_write(dev, 0x5a, e->radio_syn5a);
57 b43_radio_write(dev, 0x6a, e->radio_syn6a);
58 b43_radio_write(dev, 0x6d, e->radio_syn6d);
59 b43_radio_write(dev, 0x6e, e->radio_syn6e);
60 b43_radio_write(dev, 0x92, e->radio_syn92);
61 b43_radio_write(dev, 0x98, e->radio_syn98);
62
63 for (i = 0; i < 2; i++) {
64 routing = i ? R2059_RXRX1 : R2059_TXRX0;
65 b43_radio_write(dev, routing | 0x4a, e->radio_rxtx4a);
66 b43_radio_write(dev, routing | 0x58, e->radio_rxtx58);
67 b43_radio_write(dev, routing | 0x5a, e->radio_rxtx5a);
68 b43_radio_write(dev, routing | 0x6a, e->radio_rxtx6a);
69 b43_radio_write(dev, routing | 0x6d, e->radio_rxtx6d);
70 b43_radio_write(dev, routing | 0x6e, e->radio_rxtx6e);
71 b43_radio_write(dev, routing | 0x92, e->radio_rxtx92);
72 b43_radio_write(dev, routing | 0x98, e->radio_rxtx98);
73 }
74
75 udelay(50);
76
77 /* Calibration */
78 b43_radio_mask(dev, 0x2b, ~0x1);
79 b43_radio_mask(dev, 0x2e, ~0x4);
80 b43_radio_set(dev, 0x2e, 0x4);
81 b43_radio_set(dev, 0x2b, 0x1);
82
83 udelay(300);
84}
85
86static void b43_radio_2059_init(struct b43_wldev *dev)
87{
88 const u16 routing[] = { R2059_SYN, R2059_TXRX0, R2059_RXRX1 };
89 const u16 radio_values[3][2] = {
90 { 0x61, 0xE9 }, { 0x69, 0xD5 }, { 0x73, 0x99 },
91 };
92 u16 i, j;
93
94 b43_radio_write(dev, R2059_ALL | 0x51, 0x0070);
95 b43_radio_write(dev, R2059_ALL | 0x5a, 0x0003);
96
97 for (i = 0; i < ARRAY_SIZE(routing); i++)
98 b43_radio_set(dev, routing[i] | 0x146, 0x3);
99
100 b43_radio_set(dev, 0x2e, 0x0078);
101 b43_radio_set(dev, 0xc0, 0x0080);
102 msleep(2);
103 b43_radio_mask(dev, 0x2e, ~0x0078);
104 b43_radio_mask(dev, 0xc0, ~0x0080);
105
106 if (1) { /* FIXME */
107 b43_radio_set(dev, R2059_RXRX1 | 0x4, 0x1);
108 udelay(10);
109 b43_radio_set(dev, R2059_RXRX1 | 0x0BF, 0x1);
110 b43_radio_maskset(dev, R2059_RXRX1 | 0x19B, 0x3, 0x2);
111
112 b43_radio_set(dev, R2059_RXRX1 | 0x4, 0x2);
113 udelay(100);
114 b43_radio_mask(dev, R2059_RXRX1 | 0x4, ~0x2);
115
116 for (i = 0; i < 10000; i++) {
117 if (b43_radio_read(dev, R2059_RXRX1 | 0x145) & 1) {
118 i = 0;
119 break;
120 }
121 udelay(100);
122 }
123 if (i)
124 b43err(dev->wl, "radio 0x945 timeout\n");
125
126 b43_radio_mask(dev, R2059_RXRX1 | 0x4, ~0x1);
127 b43_radio_set(dev, 0xa, 0x60);
128
129 for (i = 0; i < 3; i++) {
130 b43_radio_write(dev, 0x17F, radio_values[i][0]);
131 b43_radio_write(dev, 0x13D, 0x6E);
132 b43_radio_write(dev, 0x13E, radio_values[i][1]);
133 b43_radio_write(dev, 0x13C, 0x55);
134
135 for (j = 0; j < 10000; j++) {
136 if (b43_radio_read(dev, 0x140) & 2) {
137 j = 0;
138 break;
139 }
140 udelay(500);
141 }
142 if (j)
143 b43err(dev->wl, "radio 0x140 timeout\n");
144
145 b43_radio_write(dev, 0x13C, 0x15);
146 }
147
148 b43_radio_mask(dev, 0x17F, ~0x1);
149 }
150
151 b43_radio_mask(dev, 0x11, ~0x0008);
152}
153
154/**************************************************
155 * Channel switching ops.
156 **************************************************/
157
158static void b43_phy_ht_channel_setup(struct b43_wldev *dev,
159 const struct b43_phy_ht_channeltab_e_phy *e,
160 struct ieee80211_channel *new_channel)
161{
162 bool old_band_5ghz;
163 u8 i;
164
165 old_band_5ghz = b43_phy_read(dev, B43_PHY_HT_BANDCTL) & 0; /* FIXME */
166 if (new_channel->band == IEEE80211_BAND_5GHZ && !old_band_5ghz) {
167 /* TODO */
168 } else if (new_channel->band == IEEE80211_BAND_2GHZ && old_band_5ghz) {
169 /* TODO */
170 }
171
172 b43_phy_write(dev, B43_PHY_HT_BW1, e->bw1);
173 b43_phy_write(dev, B43_PHY_HT_BW2, e->bw2);
174 b43_phy_write(dev, B43_PHY_HT_BW3, e->bw3);
175 b43_phy_write(dev, B43_PHY_HT_BW4, e->bw4);
176 b43_phy_write(dev, B43_PHY_HT_BW5, e->bw5);
177 b43_phy_write(dev, B43_PHY_HT_BW6, e->bw6);
178
179 /* TODO: some ops on PHY regs 0x0B0 and 0xC0A */
180
181 /* TODO: separated function? */
182 for (i = 0; i < 3; i++) {
183 u16 mask;
184 u32 tmp = b43_httab_read(dev, B43_HTTAB32(26, 0xE8));
185
186 if (0) /* FIXME */
187 mask = 0x2 << (i * 4);
188 else
189 mask = 0;
190 b43_phy_mask(dev, B43_PHY_EXTG(0x108), mask);
191
192 b43_httab_write(dev, B43_HTTAB16(7, 0x110 + i), tmp >> 16);
193 b43_httab_write(dev, B43_HTTAB8(13, 0x63 + (i * 4)),
194 tmp & 0xFF);
195 b43_httab_write(dev, B43_HTTAB8(13, 0x73 + (i * 4)),
196 tmp & 0xFF);
197 }
198
199 b43_phy_write(dev, 0x017e, 0x3830);
200}
201
202static int b43_phy_ht_set_channel(struct b43_wldev *dev,
203 struct ieee80211_channel *channel,
204 enum nl80211_channel_type channel_type)
205{
206 struct b43_phy *phy = &dev->phy;
207
208 const struct b43_phy_ht_channeltab_e_radio2059 *chent_r2059 = NULL;
209
210 if (phy->radio_ver == 0x2059) {
211 chent_r2059 = b43_phy_ht_get_channeltab_e_r2059(dev,
212 channel->center_freq);
213 if (!chent_r2059)
214 return -ESRCH;
215 } else {
216 return -ESRCH;
217 }
218
219 /* TODO: In case of N-PHY some bandwidth switching goes here */
220
221 if (phy->radio_ver == 0x2059) {
222 b43_radio_2059_channel_setup(dev, chent_r2059);
223 b43_phy_ht_channel_setup(dev, &(chent_r2059->phy_regs),
224 channel);
225 } else {
226 return -ESRCH;
227 }
228
229 return 0;
230}
231
232/**************************************************
233 * Basic PHY ops.
234 **************************************************/
235
236static int b43_phy_ht_op_allocate(struct b43_wldev *dev)
237{
238 struct b43_phy_ht *phy_ht;
239
240 phy_ht = kzalloc(sizeof(*phy_ht), GFP_KERNEL);
241 if (!phy_ht)
242 return -ENOMEM;
243 dev->phy.ht = phy_ht;
244
245 return 0;
246}
247
248static void b43_phy_ht_op_prepare_structs(struct b43_wldev *dev)
249{
250 struct b43_phy *phy = &dev->phy;
251 struct b43_phy_ht *phy_ht = phy->ht;
252
253 memset(phy_ht, 0, sizeof(*phy_ht));
254}
255
256static int b43_phy_ht_op_init(struct b43_wldev *dev)
257{
258 b43_phy_ht_tables_init(dev);
259
260 return 0;
261}
262
263static void b43_phy_ht_op_free(struct b43_wldev *dev)
264{
265 struct b43_phy *phy = &dev->phy;
266 struct b43_phy_ht *phy_ht = phy->ht;
267
268 kfree(phy_ht);
269 phy->ht = NULL;
270}
271
272/* http://bcm-v4.sipsolutions.net/802.11/Radio/Switch%20Radio */
273static void b43_phy_ht_op_software_rfkill(struct b43_wldev *dev,
274 bool blocked)
275{
276 if (b43_read32(dev, B43_MMIO_MACCTL) & B43_MACCTL_ENABLED)
277 b43err(dev->wl, "MAC not suspended\n");
278
279 /* In the following PHY ops we copy wl's dummy behaviour.
280 * TODO: Find out if reads (currently hidden in masks/masksets) are
281 * needed and replace following ops with just writes or w&r.
282 * Note: B43_PHY_HT_RF_CTL1 register is tricky, wrong operation can
283 * cause delayed (!) machine lock up. */
284 if (blocked) {
285 b43_phy_mask(dev, B43_PHY_HT_RF_CTL1, 0);
286 } else {
287 b43_phy_mask(dev, B43_PHY_HT_RF_CTL1, 0);
288 b43_phy_maskset(dev, B43_PHY_HT_RF_CTL1, 0, 0x1);
289 b43_phy_mask(dev, B43_PHY_HT_RF_CTL1, 0);
290 b43_phy_maskset(dev, B43_PHY_HT_RF_CTL1, 0, 0x2);
291
292 if (dev->phy.radio_ver == 0x2059)
293 b43_radio_2059_init(dev);
294 else
295 B43_WARN_ON(1);
296
297 b43_switch_channel(dev, dev->phy.channel);
298 }
299}
300
301static void b43_phy_ht_op_switch_analog(struct b43_wldev *dev, bool on)
302{
303 if (on) {
304 b43_phy_write(dev, B43_PHY_HT_AFE_CTL2, 0x00cd);
305 b43_phy_write(dev, B43_PHY_HT_AFE_CTL1, 0x0000);
306 b43_phy_write(dev, B43_PHY_HT_AFE_CTL4, 0x00cd);
307 b43_phy_write(dev, B43_PHY_HT_AFE_CTL3, 0x0000);
308 b43_phy_write(dev, B43_PHY_HT_AFE_CTL6, 0x00cd);
309 b43_phy_write(dev, B43_PHY_HT_AFE_CTL5, 0x0000);
310 } else {
311 b43_phy_write(dev, B43_PHY_HT_AFE_CTL1, 0x07ff);
312 b43_phy_write(dev, B43_PHY_HT_AFE_CTL2, 0x00fd);
313 b43_phy_write(dev, B43_PHY_HT_AFE_CTL3, 0x07ff);
314 b43_phy_write(dev, B43_PHY_HT_AFE_CTL4, 0x00fd);
315 b43_phy_write(dev, B43_PHY_HT_AFE_CTL5, 0x07ff);
316 b43_phy_write(dev, B43_PHY_HT_AFE_CTL6, 0x00fd);
317 }
318}
319
320static int b43_phy_ht_op_switch_channel(struct b43_wldev *dev,
321 unsigned int new_channel)
322{
323 struct ieee80211_channel *channel = dev->wl->hw->conf.channel;
324 enum nl80211_channel_type channel_type = dev->wl->hw->conf.channel_type;
325
326 if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ) {
327 if ((new_channel < 1) || (new_channel > 14))
328 return -EINVAL;
329 } else {
330 return -EINVAL;
331 }
332
333 return b43_phy_ht_set_channel(dev, channel, channel_type);
334}
335
336static unsigned int b43_phy_ht_op_get_default_chan(struct b43_wldev *dev)
337{
338 if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ)
339 return 11;
340 return 36;
341}
342
343/**************************************************
344 * R/W ops.
345 **************************************************/
346
347static u16 b43_phy_ht_op_read(struct b43_wldev *dev, u16 reg)
348{
349 b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
350 return b43_read16(dev, B43_MMIO_PHY_DATA);
351}
352
353static void b43_phy_ht_op_write(struct b43_wldev *dev, u16 reg, u16 value)
354{
355 b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
356 b43_write16(dev, B43_MMIO_PHY_DATA, value);
357}
358
359static void b43_phy_ht_op_maskset(struct b43_wldev *dev, u16 reg, u16 mask,
360 u16 set)
361{
362 b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
363 b43_write16(dev, B43_MMIO_PHY_DATA,
364 (b43_read16(dev, B43_MMIO_PHY_DATA) & mask) | set);
365}
366
367static u16 b43_phy_ht_op_radio_read(struct b43_wldev *dev, u16 reg)
368{
369 /* HT-PHY needs 0x200 for read access */
370 reg |= 0x200;
371
372 b43_write16(dev, B43_MMIO_RADIO24_CONTROL, reg);
373 return b43_read16(dev, B43_MMIO_RADIO24_DATA);
374}
375
376static void b43_phy_ht_op_radio_write(struct b43_wldev *dev, u16 reg,
377 u16 value)
378{
379 b43_write16(dev, B43_MMIO_RADIO24_CONTROL, reg);
380 b43_write16(dev, B43_MMIO_RADIO24_DATA, value);
381}
382
383static enum b43_txpwr_result
384b43_phy_ht_op_recalc_txpower(struct b43_wldev *dev, bool ignore_tssi)
385{
386 return B43_TXPWR_RES_DONE;
387}
388
389static void b43_phy_ht_op_adjust_txpower(struct b43_wldev *dev)
390{
391}
392
393/**************************************************
394 * PHY ops struct.
395 **************************************************/
396
397const struct b43_phy_operations b43_phyops_ht = {
398 .allocate = b43_phy_ht_op_allocate,
399 .free = b43_phy_ht_op_free,
400 .prepare_structs = b43_phy_ht_op_prepare_structs,
401 .init = b43_phy_ht_op_init,
402 .phy_read = b43_phy_ht_op_read,
403 .phy_write = b43_phy_ht_op_write,
404 .phy_maskset = b43_phy_ht_op_maskset,
405 .radio_read = b43_phy_ht_op_radio_read,
406 .radio_write = b43_phy_ht_op_radio_write,
407 .software_rfkill = b43_phy_ht_op_software_rfkill,
408 .switch_analog = b43_phy_ht_op_switch_analog,
409 .switch_channel = b43_phy_ht_op_switch_channel,
410 .get_default_chan = b43_phy_ht_op_get_default_chan,
411 .recalc_txpower = b43_phy_ht_op_recalc_txpower,
412 .adjust_txpower = b43_phy_ht_op_adjust_txpower,
413};