1
2 /*
3 * Linux device driver for RTL8180 / RTL8185
4 *
5 * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
6 * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
7 *
8 * Modified for iPXE, June 2009, by Joshua Oreman <oremanj@rwcr.net>
9 *
10 * Based on the r8180 driver, which is:
11 * Copyright 2004-2005 Andrea Merello <andreamrl@tiscali.it>, et al.
12 *
13 * Thanks to Realtek for their support!
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License version 2 as
17 * published by the Free Software Foundation.
18 */
19
20 FILE_LICENCE(GPL2_ONLY);
21
22 #include <stdint.h>
23 #include <errno.h>
24 #include <stdio.h>
25 #include <unistd.h>
26 #include <byteswap.h>
27 #include <ipxe/iobuf.h>
28 #include <ipxe/malloc.h>
29 #include <ipxe/pci.h>
30 #include <ipxe/net80211.h>
31 #include <ipxe/netdevice.h>
32 #include <ipxe/threewire.h>
33
34 #include "rtl818x.h"
35
36 /* rtl818x_rates[hw rate number] = rate in 100kbps units */
37 static const u16 rtl818x_rates[] = {
38 10, 20, 55, 110, /* 802.11b */
39 60, 90, 120, 180, 240, 360, 480, 540, /* 802.11g */
40 0, 0, 0, 0, /* index safely using a value masked with 0xF */
41 };
42 #define RTL818X_NR_B_RATES 4
43 #define RTL818X_NR_RATES 12
44
45 /* used by RF drivers */
rtl818x_write_phy(struct net80211_device * dev,u8 addr,u32 data)46 void rtl818x_write_phy(struct net80211_device *dev, u8 addr, u32 data)
47 {
48 struct rtl818x_priv *priv = dev->priv;
49 int i = 10;
50 u32 buf;
51
52 buf = (data << 8) | addr;
53
54 rtl818x_iowrite32(priv, (u32 *)&priv->map->PHY[0], buf | 0x80);
55 while (i--) {
56 rtl818x_iowrite32(priv, (u32 *)&priv->map->PHY[0], buf);
57 if (rtl818x_ioread8(priv, &priv->map->PHY[2]) == (data & 0xFF))
58 return;
59 }
60 }
61
rtl818x_handle_rx(struct net80211_device * dev)62 static void rtl818x_handle_rx(struct net80211_device *dev)
63 {
64 struct rtl818x_priv *priv = dev->priv;
65 unsigned int count = RTL818X_RX_RING_SIZE;
66
67 while (count--) {
68 struct rtl818x_rx_desc *entry = &priv->rx_ring[priv->rx_idx];
69 struct io_buffer *iob = priv->rx_buf[priv->rx_idx];
70 u32 flags = le32_to_cpu(entry->flags);
71
72 if (flags & RTL818X_RX_DESC_FLAG_OWN)
73 return;
74
75 if (flags & (RTL818X_RX_DESC_FLAG_DMA_FAIL |
76 RTL818X_RX_DESC_FLAG_FOF |
77 RTL818X_RX_DESC_FLAG_RX_ERR)) {
78 /* This is crappy hardware. The Linux driver
79 doesn't even log these. */
80 goto done;
81 } else if (flags & RTL818X_RX_DESC_FLAG_CRC32_ERR) {
82 /* This is actually a corrupt packet. */
83 DBG2("rtl818x RX:%d CRC fail: flags %08x\n",
84 priv->rx_idx, flags);
85 net80211_rx_err(dev, NULL, EIO);
86 } else {
87 u32 flags2 = le32_to_cpu(entry->flags2);
88 struct io_buffer *new_iob = alloc_iob(MAX_RX_SIZE);
89 if (!new_iob) {
90 net80211_rx_err(dev, NULL, ENOMEM);
91 goto done;
92 }
93
94 DBGP("rtl818x RX:%d success: flags %08x %08x\n",
95 priv->rx_idx, flags, flags2);
96
97 iob_put(iob, flags & 0xFFF);
98
99 net80211_rx(dev, iob, (flags2 >> 8) & 0x7f,
100 rtl818x_rates[(flags >> 20) & 0xf]);
101
102 iob = new_iob;
103 priv->rx_buf[priv->rx_idx] = iob;
104 }
105
106 done:
107 entry->rx_buf = cpu_to_le32(virt_to_bus(iob->data));
108 entry->flags = cpu_to_le32(RTL818X_RX_DESC_FLAG_OWN | MAX_RX_SIZE);
109
110 if (priv->rx_idx == RTL818X_RX_RING_SIZE - 1)
111 entry->flags |= cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
112
113 priv->rx_idx = (priv->rx_idx + 1) % RTL818X_RX_RING_SIZE;
114 }
115 }
116
rtl818x_handle_tx(struct net80211_device * dev)117 static void rtl818x_handle_tx(struct net80211_device *dev)
118 {
119 struct rtl818x_priv *priv = dev->priv;
120 unsigned int count = RTL818X_TX_RING_SIZE;
121
122 while (count--) {
123 struct rtl818x_tx_desc *entry = &priv->tx_ring[priv->tx_cons];
124 struct io_buffer *iob = priv->tx_buf[priv->tx_cons];
125 u32 flags = le32_to_cpu(entry->flags);
126 int rc;
127
128 if ((flags & RTL818X_TX_DESC_FLAG_OWN) || !iob)
129 return;
130
131 rc = 0;
132 if (!(flags & RTL818X_TX_DESC_FLAG_TX_OK)) {
133 /* our packet was not ACKed properly */
134 rc = EIO;
135 }
136
137 net80211_tx_complete(dev, iob, flags & 0xFF, rc);
138
139 priv->tx_buf[priv->tx_cons] = NULL;
140 priv->tx_cons = (priv->tx_cons + 1) % RTL818X_TX_RING_SIZE;
141 }
142 }
143
rtl818x_poll(struct net80211_device * dev)144 static void rtl818x_poll(struct net80211_device *dev)
145 {
146 struct rtl818x_priv *priv = dev->priv;
147 u16 reg = rtl818x_ioread16(priv, &priv->map->INT_STATUS);
148
149 if (reg == 0xFFFF)
150 return;
151
152 rtl818x_iowrite16(priv, &priv->map->INT_STATUS, reg);
153
154 if (reg & (RTL818X_INT_TXN_OK | RTL818X_INT_TXN_ERR))
155 rtl818x_handle_tx(dev);
156
157 if (reg & (RTL818X_INT_RX_OK | RTL818X_INT_RX_ERR))
158 rtl818x_handle_rx(dev);
159 }
160
161 #define DIV_ROUND_UP(n,d) (((n)+(d)-1)/(d))
162
rtl818x_tx(struct net80211_device * dev,struct io_buffer * iob)163 static int rtl818x_tx(struct net80211_device *dev, struct io_buffer *iob)
164 {
165 struct rtl818x_priv *priv = dev->priv;
166 struct rtl818x_tx_desc *entry;
167 u32 tx_flags;
168 u16 plcp_len = 0;
169 int len = iob_len(iob);
170
171 tx_flags = RTL818X_TX_DESC_FLAG_OWN | RTL818X_TX_DESC_FLAG_FS |
172 RTL818X_TX_DESC_FLAG_LS | (priv->hw_rate << 24) | len;
173
174 if (priv->r8185) {
175 tx_flags |= RTL818X_TX_DESC_FLAG_DMA |
176 RTL818X_TX_DESC_FLAG_NO_ENC;
177 } else {
178 unsigned int remainder;
179
180 plcp_len = DIV_ROUND_UP(16 * (len + 4),
181 (dev->rates[dev->rate] * 2) / 10);
182 remainder = (16 * (len + 4)) %
183 ((dev->rates[dev->rate] * 2) / 10);
184
185 if (remainder > 0 && remainder <= 6)
186 plcp_len |= 1 << 15;
187 }
188
189 entry = &priv->tx_ring[priv->tx_prod];
190
191 if (dev->phy_flags & NET80211_PHY_USE_PROTECTION) {
192 tx_flags |= RTL818X_TX_DESC_FLAG_CTS;
193 tx_flags |= priv->hw_rtscts_rate << 19;
194 entry->rts_duration = net80211_cts_duration(dev, len);
195 } else {
196 entry->rts_duration = 0;
197 }
198
199 if (entry->flags & RTL818X_TX_DESC_FLAG_OWN) {
200 /* card hasn't processed the old packet yet! */
201 return -EBUSY;
202 }
203
204 priv->tx_buf[priv->tx_prod] = iob;
205 priv->tx_prod = (priv->tx_prod + 1) % RTL818X_TX_RING_SIZE;
206
207 entry->plcp_len = cpu_to_le16(plcp_len);
208 entry->tx_buf = cpu_to_le32(virt_to_bus(iob->data));
209 entry->frame_len = cpu_to_le32(len);
210 entry->flags2 = /* alternate retry rate in 100kbps << 4 */ 0;
211 entry->retry_limit = RTL818X_MAX_RETRIES;
212 entry->flags = cpu_to_le32(tx_flags);
213
214 rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING, (1 << 5));
215
216 return 0;
217 }
218
rtl818x_set_anaparam(struct rtl818x_priv * priv,u32 anaparam)219 void rtl818x_set_anaparam(struct rtl818x_priv *priv, u32 anaparam)
220 {
221 u8 reg;
222
223 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
224 reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
225 rtl818x_iowrite8(priv, &priv->map->CONFIG3,
226 reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
227 rtl818x_iowrite32(priv, &priv->map->ANAPARAM, anaparam);
228 rtl818x_iowrite8(priv, &priv->map->CONFIG3,
229 reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
230 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
231 }
232
rtl818x_init_hw(struct net80211_device * dev)233 static int rtl818x_init_hw(struct net80211_device *dev)
234 {
235 struct rtl818x_priv *priv = dev->priv;
236 u16 reg;
237
238 rtl818x_iowrite8(priv, &priv->map->CMD, 0);
239 rtl818x_ioread8(priv, &priv->map->CMD);
240 mdelay(10);
241
242 /* reset */
243 rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
244 rtl818x_ioread8(priv, &priv->map->CMD);
245
246 reg = rtl818x_ioread8(priv, &priv->map->CMD);
247 reg &= (1 << 1);
248 reg |= RTL818X_CMD_RESET;
249 rtl818x_iowrite8(priv, &priv->map->CMD, RTL818X_CMD_RESET);
250 rtl818x_ioread8(priv, &priv->map->CMD);
251 mdelay(200);
252
253 /* check success of reset */
254 if (rtl818x_ioread8(priv, &priv->map->CMD) & RTL818X_CMD_RESET) {
255 DBG("rtl818x %s: reset timeout!\n", dev->netdev->name);
256 return -ETIMEDOUT;
257 }
258
259 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
260 rtl818x_ioread8(priv, &priv->map->CMD);
261 mdelay(200);
262
263 if (rtl818x_ioread8(priv, &priv->map->CONFIG3) & (1 << 3)) {
264 /* For cardbus */
265 reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
266 reg |= 1 << 1;
267 rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg);
268 reg = rtl818x_ioread16(priv, &priv->map->FEMR);
269 reg |= (1 << 15) | (1 << 14) | (1 << 4);
270 rtl818x_iowrite16(priv, &priv->map->FEMR, reg);
271 }
272
273 rtl818x_iowrite8(priv, &priv->map->MSR, 0);
274
275 if (!priv->r8185)
276 rtl818x_set_anaparam(priv, priv->anaparam);
277
278 rtl818x_iowrite32(priv, &priv->map->RDSAR, priv->rx_ring_dma);
279 rtl818x_iowrite32(priv, &priv->map->TNPDA, priv->tx_ring_dma);
280
281 /* TODO: necessary? specs indicate not */
282 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
283 reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
284 rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg & ~(1 << 3));
285 if (priv->r8185) {
286 reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
287 rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg | (1 << 4));
288 }
289 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
290
291 /* TODO: set CONFIG5 for calibrating AGC on rtl8180 + philips radio? */
292
293 /* TODO: turn off hw wep on rtl8180 */
294
295 rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
296
297 if (priv->r8185) {
298 rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
299 rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);
300 rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);
301
302 rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
303
304 /* TODO: set ClkRun enable? necessary? */
305 reg = rtl818x_ioread8(priv, &priv->map->GP_ENABLE);
306 rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, reg & ~(1 << 6));
307 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
308 reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
309 rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | (1 << 2));
310 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
311 } else {
312 rtl818x_iowrite16(priv, &priv->map->BRSR, 0x1);
313 rtl818x_iowrite8(priv, &priv->map->SECURITY, 0);
314
315 rtl818x_iowrite8(priv, &priv->map->PHY_DELAY, 0x6);
316 rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER, 0x4C);
317 }
318
319 priv->rf->init(dev);
320 if (priv->r8185)
321 rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
322 return 0;
323 }
324
rtl818x_init_rx_ring(struct net80211_device * dev)325 static int rtl818x_init_rx_ring(struct net80211_device *dev)
326 {
327 struct rtl818x_priv *priv = dev->priv;
328 struct rtl818x_rx_desc *entry;
329 int i;
330
331 priv->rx_ring = malloc_dma(sizeof(*priv->rx_ring) * RTL818X_RX_RING_SIZE,
332 RTL818X_RING_ALIGN);
333 priv->rx_ring_dma = virt_to_bus(priv->rx_ring);
334 if (!priv->rx_ring) {
335 DBG("rtl818x %s: cannot allocate RX ring\n", dev->netdev->name);
336 return -ENOMEM;
337 }
338
339 memset(priv->rx_ring, 0, sizeof(*priv->rx_ring) * RTL818X_RX_RING_SIZE);
340 priv->rx_idx = 0;
341
342 for (i = 0; i < RTL818X_RX_RING_SIZE; i++) {
343 struct io_buffer *iob = alloc_iob(MAX_RX_SIZE);
344 entry = &priv->rx_ring[i];
345 if (!iob)
346 return -ENOMEM;
347
348 priv->rx_buf[i] = iob;
349 entry->rx_buf = cpu_to_le32(virt_to_bus(iob->data));
350 entry->flags = cpu_to_le32(RTL818X_RX_DESC_FLAG_OWN |
351 MAX_RX_SIZE);
352 }
353 entry->flags |= cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
354 return 0;
355 }
356
rtl818x_free_rx_ring(struct net80211_device * dev)357 static void rtl818x_free_rx_ring(struct net80211_device *dev)
358 {
359 struct rtl818x_priv *priv = dev->priv;
360 int i;
361
362 for (i = 0; i < RTL818X_RX_RING_SIZE; i++) {
363 free_iob(priv->rx_buf[i]);
364 priv->rx_buf[i] = NULL;
365 }
366
367 free_dma(priv->rx_ring, sizeof(*priv->rx_ring) * RTL818X_RX_RING_SIZE);
368 priv->rx_ring = NULL;
369 }
370
rtl818x_init_tx_ring(struct net80211_device * dev)371 static int rtl818x_init_tx_ring(struct net80211_device *dev)
372 {
373 struct rtl818x_priv *priv = dev->priv;
374 int i;
375
376 priv->tx_ring = malloc_dma(sizeof(*priv->tx_ring) * RTL818X_TX_RING_SIZE,
377 RTL818X_RING_ALIGN);
378 priv->tx_ring_dma = virt_to_bus(priv->tx_ring);
379 if (!priv->tx_ring) {
380 DBG("rtl818x %s: cannot allocate TX ring\n", dev->netdev->name);
381 return -ENOMEM;
382 }
383
384 memset(priv->tx_ring, 0, sizeof(*priv->tx_ring) * RTL818X_TX_RING_SIZE);
385 priv->tx_prod = priv->tx_cons = 0;
386
387 for (i = 0; i < RTL818X_TX_RING_SIZE; i++)
388 priv->tx_ring[i].next_tx_desc = cpu_to_le32(priv->tx_ring_dma +
389 ((i + 1) % RTL818X_TX_RING_SIZE) * sizeof(*priv->tx_ring));
390
391 return 0;
392 }
393
rtl818x_free_tx_ring(struct net80211_device * dev)394 static void rtl818x_free_tx_ring(struct net80211_device *dev)
395 {
396 struct rtl818x_priv *priv = dev->priv;
397 int i;
398
399 for (i = 0; i < RTL818X_TX_RING_SIZE; i++) {
400 if (priv->tx_buf[i])
401 net80211_tx_complete(dev, priv->tx_buf[i], 0, ECANCELED);
402 priv->tx_buf[i] = NULL;
403 }
404
405 free_dma(priv->tx_ring, sizeof(*priv->tx_ring) * RTL818X_TX_RING_SIZE);
406 priv->tx_ring = NULL;
407 }
408
rtl818x_irq(struct net80211_device * dev,int enable)409 static void rtl818x_irq(struct net80211_device *dev, int enable)
410 {
411 struct rtl818x_priv *priv = dev->priv;
412 rtl818x_iowrite16(priv, &priv->map->INT_MASK, enable? 0xFFFF : 0);
413 }
414
415 /* Sets the MAC address of the card. */
rtl818x_set_hwaddr(struct net80211_device * dev,u8 * hwaddr)416 static void rtl818x_set_hwaddr(struct net80211_device *dev, u8 *hwaddr)
417 {
418 struct rtl818x_priv *priv = dev->priv;
419 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
420 rtl818x_iowrite32(priv, (u32 *)&priv->map->MAC[0],
421 le32_to_cpu(*(u32 *)hwaddr));
422 rtl818x_iowrite16(priv, (u16 *)&priv->map->MAC[4],
423 le16_to_cpu(*(u16 *)(hwaddr + 4)));
424 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
425 }
426
rtl818x_start(struct net80211_device * dev)427 static int rtl818x_start(struct net80211_device *dev)
428 {
429 struct rtl818x_priv *priv = dev->priv;
430 int ret;
431 u32 reg;
432
433 ret = rtl818x_init_rx_ring(dev);
434 if (ret)
435 return ret;
436
437 ret = rtl818x_init_tx_ring(dev);
438 if (ret)
439 goto err_free_rings;
440
441 ret = rtl818x_init_hw(dev);
442 if (ret)
443 goto err_free_rings;
444
445 rtl818x_set_hwaddr(dev, dev->netdev->ll_addr);
446
447 rtl818x_iowrite32(priv, &priv->map->RDSAR, priv->rx_ring_dma);
448 rtl818x_iowrite32(priv, &priv->map->TNPDA, priv->tx_ring_dma);
449
450 rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
451
452 rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
453 rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);
454
455 reg = RTL818X_RX_CONF_ONLYERLPKT |
456 RTL818X_RX_CONF_RX_AUTORESETPHY |
457 RTL818X_RX_CONF_MGMT |
458 RTL818X_RX_CONF_DATA |
459 (7 << 8 /* MAX RX DMA */) |
460 RTL818X_RX_CONF_BROADCAST |
461 RTL818X_RX_CONF_NICMAC;
462
463 if (priv->r8185)
464 reg |= RTL818X_RX_CONF_CSDM1 | RTL818X_RX_CONF_CSDM2;
465 else {
466 reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE1)
467 ? RTL818X_RX_CONF_CSDM1 : 0;
468 reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE2)
469 ? RTL818X_RX_CONF_CSDM2 : 0;
470 }
471
472 priv->rx_conf = reg;
473 rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
474
475 if (priv->r8185) {
476 reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
477 reg &= ~RTL818X_CW_CONF_PERPACKET_CW_SHIFT;
478 reg |= RTL818X_CW_CONF_PERPACKET_RETRY_SHIFT;
479 rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
480
481 reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
482 reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN_SHIFT;
483 reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL_SHIFT;
484 reg |= RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
485 rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
486
487 /* disable early TX */
488 rtl818x_iowrite8(priv, (u8 *)priv->map + 0xec, 0x3f);
489 }
490
491 reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
492 reg |= (6 << 21 /* MAX TX DMA */) |
493 RTL818X_TX_CONF_NO_ICV;
494
495 if (priv->r8185)
496 reg &= ~RTL818X_TX_CONF_PROBE_DTS;
497 else
498 reg &= ~RTL818X_TX_CONF_HW_SEQNUM;
499
500 /* different meaning, same value on both rtl8185 and rtl8180 */
501 reg &= ~RTL818X_TX_CONF_SAT_HWPLCP;
502
503 rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
504
505 reg = rtl818x_ioread8(priv, &priv->map->CMD);
506 reg |= RTL818X_CMD_RX_ENABLE;
507 reg |= RTL818X_CMD_TX_ENABLE;
508 rtl818x_iowrite8(priv, &priv->map->CMD, reg);
509
510 DBG("%s rtl818x: started\n", dev->netdev->name);
511
512 return 0;
513
514 err_free_rings:
515 rtl818x_free_rx_ring(dev);
516 if (priv->tx_ring)
517 rtl818x_free_tx_ring(dev);
518
519 DBG("%s rtl818x: failed to start\n", dev->netdev->name);
520
521 return ret;
522 }
523
rtl818x_stop(struct net80211_device * dev)524 static void rtl818x_stop(struct net80211_device *dev)
525 {
526 struct rtl818x_priv *priv = dev->priv;
527 u8 reg;
528
529 rtl818x_irq(dev, 0);
530
531 reg = rtl818x_ioread8(priv, &priv->map->CMD);
532 reg &= ~RTL818X_CMD_TX_ENABLE;
533 reg &= ~RTL818X_CMD_RX_ENABLE;
534 rtl818x_iowrite8(priv, &priv->map->CMD, reg);
535
536 priv->rf->stop(dev);
537
538 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
539 reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
540 rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
541 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
542
543 rtl818x_free_rx_ring(dev);
544 rtl818x_free_tx_ring(dev);
545 }
546
rtl818x_config(struct net80211_device * dev,int changed)547 static int rtl818x_config(struct net80211_device *dev, int changed)
548 {
549 struct rtl818x_priv *priv = dev->priv;
550 int i;
551
552 if (changed & NET80211_CFG_CHANNEL)
553 priv->rf->set_chan(dev, &dev->channels[dev->channel]);
554
555 if (changed & NET80211_CFG_ASSOC) {
556 for (i = 0; i < ETH_ALEN; i++)
557 rtl818x_iowrite8(priv, &priv->map->BSSID[i], dev->bssid[i]);
558 rtl818x_iowrite8(priv, &priv->map->MSR,
559 dev->state & NET80211_ASSOCIATED?
560 RTL818X_MSR_INFRA : RTL818X_MSR_NO_LINK);
561 }
562
563 if (changed & NET80211_CFG_PHY_PARAMS)
564 priv->rf->conf_erp(dev);
565
566 if (changed & NET80211_CFG_RATE) {
567 /* figure out the hardware rate number for the new
568 logical rate */
569 int hw_rate;
570 for (hw_rate = 0; hw_rate < RTL818X_NR_RATES &&
571 rtl818x_rates[hw_rate] != dev->rates[dev->rate];
572 hw_rate++)
573 ;
574 if (hw_rate >= RTL818X_NR_RATES)
575 return -EINVAL;
576
577 priv->hw_rate = hw_rate;
578
579 /* and the RTS/CTS rate */
580 for (hw_rate = 0; hw_rate < RTL818X_NR_RATES &&
581 rtl818x_rates[hw_rate] !=
582 dev->rates[dev->rtscts_rate];
583 hw_rate++)
584 ;
585 if (hw_rate >= RTL818X_NR_RATES)
586 hw_rate = priv->hw_rate;
587
588 priv->hw_rtscts_rate = hw_rate;
589 }
590
591 return 0;
592 }
593
594 static const u8 rtl818x_eeprom_bits[] = {
595 [SPI_BIT_SCLK] = RTL818X_EEPROM_CMD_CK,
596 [SPI_BIT_MISO] = RTL818X_EEPROM_CMD_READ,
597 [SPI_BIT_MOSI] = RTL818X_EEPROM_CMD_WRITE,
598 [SPI_BIT_SS(0)] = RTL818X_EEPROM_CMD_CS,
599 };
600
rtl818x_spi_read_bit(struct bit_basher * basher,unsigned int bit_id)601 static int rtl818x_spi_read_bit(struct bit_basher *basher, unsigned int bit_id)
602 {
603 struct rtl818x_priv *priv = container_of(basher, struct rtl818x_priv,
604 spibit.basher);
605
606 u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
607 return reg & rtl818x_eeprom_bits[bit_id];
608 }
609
rtl818x_spi_write_bit(struct bit_basher * basher,unsigned int bit_id,unsigned long data)610 static void rtl818x_spi_write_bit(struct bit_basher *basher,
611 unsigned int bit_id, unsigned long data)
612 {
613 struct rtl818x_priv *priv = container_of(basher, struct rtl818x_priv,
614 spibit.basher);
615
616 u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
617 u8 mask = rtl818x_eeprom_bits[bit_id];
618 reg = (reg & ~mask) | (data & mask);
619
620 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
621
622 rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
623 udelay(10);
624 }
625
626 static struct bit_basher_operations rtl818x_basher_ops = {
627 .read = rtl818x_spi_read_bit,
628 .write = rtl818x_spi_write_bit,
629 };
630
631 #if DBGLVL_MAX
632 static const char *rtl818x_rf_names[] = {
633 NULL, /* no 0 */
634 "Intersil", "RFMD", /* unsupported 1-2 */
635 "SA2400", "max2820", "GRF5101", /* supported 3-5 */
636 NULL, NULL, NULL, /* no 6-8 */
637 "RTL8225", /* supported 9 */
638 "RTL8255", /* unsupported 10 */
639 };
640 #define RTL818X_NR_RF_NAMES 11
641 #endif
642
643 struct net80211_device_operations rtl818x_operations = {
644 .open = rtl818x_start,
645 .close = rtl818x_stop,
646 .transmit = rtl818x_tx,
647 .poll = rtl818x_poll,
648 .irq = rtl818x_irq,
649 .config = rtl818x_config,
650 };
651
rtl818x_probe(struct pci_device * pdev)652 int rtl818x_probe(struct pci_device *pdev )
653 {
654 struct net80211_device *dev;
655 struct rtl818x_priv *priv;
656 struct rtl818x_rf_ops *rf;
657 int err, i;
658 const char *chip_name;
659 u32 reg;
660 u16 eeprom_val;
661 struct net80211_hw_info *hwinfo;
662
663 hwinfo = zalloc(sizeof(*hwinfo));
664 if (!hwinfo) {
665 DBG("rtl818x: hwinfo alloc failed\n");
666 err = -ENOMEM;
667 goto err_alloc_hwinfo;
668 }
669
670 adjust_pci_device(pdev);
671
672 dev = net80211_alloc(sizeof(*priv));
673 if (!dev) {
674 DBG("rtl818x: net80211 alloc failed\n");
675 err = -ENOMEM;
676 goto err_alloc_dev;
677 }
678
679 priv = dev->priv;
680 priv->pdev = pdev;
681 dev->netdev->dev = &pdev->dev;
682
683 priv->map = (struct rtl818x_csr *)pdev->ioaddr;
684 if (!priv->map) {
685 DBG("rtl818x: cannot find device memory\n");
686 err = -ENXIO;
687 goto err_free_dev;
688 }
689
690 reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
691 reg &= RTL818X_TX_CONF_HWVER_MASK;
692 switch (reg) {
693 case RTL818X_TX_CONF_R8180_ABCD:
694 chip_name = "0";
695 break;
696 case RTL818X_TX_CONF_R8180_F:
697 chip_name = "0vF";
698 break;
699 case RTL818X_TX_CONF_R8185_ABC:
700 chip_name = "5";
701 break;
702 case RTL818X_TX_CONF_R8185_D:
703 chip_name = "5vD";
704 break;
705 default:
706 DBG("rtl818x: Unknown chip! (0x%x)\n", reg >> 25);
707 err = -ENOSYS;
708 goto err_free_dev;
709 }
710
711 priv->r8185 = reg & RTL818X_TX_CONF_R8185_ABC;
712
713 hwinfo->bands = NET80211_BAND_BIT_2GHZ;
714 hwinfo->flags = NET80211_HW_RX_HAS_FCS;
715 hwinfo->signal_type = NET80211_SIGNAL_ARBITRARY;
716 hwinfo->signal_max = 65;
717 hwinfo->channel_change_time = 1000;
718
719 memcpy(hwinfo->rates[NET80211_BAND_2GHZ], rtl818x_rates,
720 sizeof(*rtl818x_rates) * RTL818X_NR_RATES);
721
722 if (priv->r8185) {
723 hwinfo->modes = NET80211_MODE_B | NET80211_MODE_G;
724 hwinfo->nr_rates[NET80211_BAND_2GHZ] = RTL818X_NR_RATES;
725 } else {
726 hwinfo->modes = NET80211_MODE_B;
727 hwinfo->nr_rates[NET80211_BAND_2GHZ] = RTL818X_NR_B_RATES;
728 }
729
730 priv->spibit.basher.op = &rtl818x_basher_ops;
731 priv->spibit.bus.mode = SPI_MODE_THREEWIRE;
732 init_spi_bit_basher(&priv->spibit);
733
734 DBG2("rtl818x RX_CONF: %08x\n", rtl818x_ioread32(priv, &priv->map->RX_CONF));
735
736 if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
737 init_at93c66(&priv->eeprom, 16);
738 else
739 init_at93c46(&priv->eeprom, 16);
740 priv->eeprom.bus = &priv->spibit.bus;
741
742 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_PROGRAM);
743 rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
744 udelay(10);
745
746 nvs_read(&priv->eeprom.nvs, 0x06, &eeprom_val, 2);
747 DBG2("rtl818x eeprom val = %04x\n", eeprom_val);
748 eeprom_val &= 0xFF;
749
750 priv->rf = NULL;
751 for_each_table_entry(rf, RTL818X_RF_DRIVERS) {
752 if (rf->id == eeprom_val) {
753 priv->rf = rf;
754 break;
755 }
756 }
757
758 if (!priv->rf) {
759 #if DBGLVL_MAX
760 if (eeprom_val < RTL818X_NR_RF_NAMES &&
761 rtl818x_rf_names[eeprom_val] != NULL)
762 DBG("rtl818x: %s RF frontend not supported!\n",
763 rtl818x_rf_names[eeprom_val]);
764 else
765 DBG("rtl818x: RF frontend #%d not recognized!\n",
766 eeprom_val);
767 #endif
768
769 err = -ENOSYS;
770 goto err_free_dev;
771 }
772
773 nvs_read(&priv->eeprom.nvs, 0x17, &eeprom_val, 2);
774 priv->csthreshold = eeprom_val >> 8;
775 if (!priv->r8185) {
776 nvs_read(&priv->eeprom.nvs, 0xD, &priv->anaparam, 4);
777 nvs_read(&priv->eeprom.nvs, 0x19, &priv->rfparam, 2);
778 priv->anaparam = le32_to_cpu(priv->anaparam);
779 priv->rfparam = le16_to_cpu(priv->rfparam);
780 }
781
782 /* read the MAC address */
783 nvs_read(&priv->eeprom.nvs, 0x7, hwinfo->hwaddr, 6);
784
785 /* CCK TX power */
786 for (i = 0; i < 14; i += 2) {
787 u16 txpwr;
788 nvs_read(&priv->eeprom.nvs, 0x10 + (i >> 1), &txpwr, 2);
789 priv->txpower[i] = txpwr & 0xFF;
790 priv->txpower[i + 1] = txpwr >> 8;
791 }
792
793 /* OFDM TX power */
794 if (priv->r8185) {
795 for (i = 0; i < 14; i += 2) {
796 u16 txpwr;
797 nvs_read(&priv->eeprom.nvs, 0x20 + (i >> 1), &txpwr, 2);
798 priv->txpower[i] |= (txpwr & 0xFF) << 8;
799 priv->txpower[i + 1] |= txpwr & 0xFF00;
800 }
801 }
802
803 rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
804
805 err = net80211_register(dev, &rtl818x_operations, hwinfo);
806 if (err) {
807 DBG("rtl818x: cannot register device\n");
808 goto err_free_dev;
809 }
810
811 free(hwinfo);
812
813 DBG("rtl818x: Realtek RTL818%s (RF chip %s) with address %s\n",
814 chip_name, priv->rf->name, netdev_addr(dev->netdev));
815
816 return 0;
817
818 err_free_dev:
819 pci_set_drvdata(pdev, NULL);
820 net80211_free(dev);
821 err_alloc_dev:
822 free(hwinfo);
823 err_alloc_hwinfo:
824 return err;
825 }
826
rtl818x_remove(struct pci_device * pdev)827 void rtl818x_remove(struct pci_device *pdev)
828 {
829 struct net80211_device *dev = pci_get_drvdata(pdev);
830
831 if (!dev)
832 return;
833
834 net80211_unregister(dev);
835 net80211_free(dev);
836 }
837