clocks: tegra12: Use static CPU-EMC co-relation
[linux-3.10.git] / drivers / net / wireless / p54 / p54usb.c
1
2 /*
3  * Linux device driver for USB based Prism54
4  *
5  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
6  *
7  * Based on the islsm (softmac prism54) driver, which is:
8  * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  */
14
15 #include <linux/init.h>
16 #include <linux/usb.h>
17 #include <linux/pci.h>
18 #include <linux/slab.h>
19 #include <linux/firmware.h>
20 #include <linux/etherdevice.h>
21 #include <linux/delay.h>
22 #include <linux/crc32.h>
23 #include <linux/module.h>
24 #include <net/mac80211.h>
25
26 #include "p54.h"
27 #include "lmac.h"
28 #include "p54usb.h"
29
30 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
31 MODULE_DESCRIPTION("Prism54 USB wireless driver");
32 MODULE_LICENSE("GPL");
33 MODULE_ALIAS("prism54usb");
34 MODULE_FIRMWARE("isl3886usb");
35 MODULE_FIRMWARE("isl3887usb");
36
37 /*
38  * Note:
39  *
40  * Always update our wiki's device list (located at:
41  * http://wireless.kernel.org/en/users/Drivers/p54/devices ),
42  * whenever you add a new device.
43  */
44
45 static struct usb_device_id p54u_table[] = {
46         /* Version 1 devices (pci chip + net2280) */
47         {USB_DEVICE(0x0411, 0x0050)},   /* Buffalo WLI2-USB2-G54 */
48         {USB_DEVICE(0x045e, 0x00c2)},   /* Microsoft MN-710 */
49         {USB_DEVICE(0x0506, 0x0a11)},   /* 3COM 3CRWE254G72 */
50         {USB_DEVICE(0x0675, 0x0530)},   /* DrayTek Vigor 530 */
51         {USB_DEVICE(0x06b9, 0x0120)},   /* Thomson SpeedTouch 120g */
52         {USB_DEVICE(0x0707, 0xee06)},   /* SMC 2862W-G */
53         {USB_DEVICE(0x07aa, 0x001c)},   /* Corega CG-WLUSB2GT */
54         {USB_DEVICE(0x083a, 0x4501)},   /* Accton 802.11g WN4501 USB */
55         {USB_DEVICE(0x083a, 0x4502)},   /* Siemens Gigaset USB Adapter */
56         {USB_DEVICE(0x083a, 0x5501)},   /* Phillips CPWUA054 */
57         {USB_DEVICE(0x0846, 0x4200)},   /* Netgear WG121 */
58         {USB_DEVICE(0x0846, 0x4210)},   /* Netgear WG121 the second ? */
59         {USB_DEVICE(0x0846, 0x4220)},   /* Netgear WG111 */
60         {USB_DEVICE(0x09aa, 0x1000)},   /* Spinnaker Proto board */
61         {USB_DEVICE(0x0bf8, 0x1007)},   /* Fujitsu E-5400 USB */
62         {USB_DEVICE(0x0cde, 0x0006)},   /* Medion 40900, Roper Europe */
63         {USB_DEVICE(0x0db0, 0x6826)},   /* MSI UB54G (MS-6826) */
64         {USB_DEVICE(0x107b, 0x55f2)},   /* Gateway WGU-210 (Gemtek) */
65         {USB_DEVICE(0x124a, 0x4023)},   /* Shuttle PN15, Airvast WM168g, IOGear GWU513 */
66         {USB_DEVICE(0x1435, 0x0210)},   /* Inventel UR054G */
67         {USB_DEVICE(0x15a9, 0x0002)},   /* Gemtek WUBI-100GW 802.11g */
68         {USB_DEVICE(0x1630, 0x0005)},   /* 2Wire 802.11g USB (v1) / Z-Com */
69         {USB_DEVICE(0x182d, 0x096b)},   /* Sitecom WL-107 */
70         {USB_DEVICE(0x1915, 0x2234)},   /* Linksys WUSB54G OEM */
71         {USB_DEVICE(0x1915, 0x2235)},   /* Linksys WUSB54G Portable OEM */
72         {USB_DEVICE(0x2001, 0x3701)},   /* DLink DWL-G120 Spinnaker */
73         {USB_DEVICE(0x2001, 0x3703)},   /* DLink DWL-G122 */
74         {USB_DEVICE(0x2001, 0x3762)},   /* Conceptronic C54U */
75         {USB_DEVICE(0x5041, 0x2234)},   /* Linksys WUSB54G */
76         {USB_DEVICE(0x5041, 0x2235)},   /* Linksys WUSB54G Portable */
77
78         /* Version 2 devices (3887) */
79         {USB_DEVICE(0x0471, 0x1230)},   /* Philips CPWUA054/00 */
80         {USB_DEVICE(0x050d, 0x7050)},   /* Belkin F5D7050 ver 1000 */
81         {USB_DEVICE(0x0572, 0x2000)},   /* Cohiba Proto board */
82         {USB_DEVICE(0x0572, 0x2002)},   /* Cohiba Proto board */
83         {USB_DEVICE(0x06a9, 0x000e)},   /* Westell 802.11g USB (A90-211WG-01) */
84         {USB_DEVICE(0x06b9, 0x0121)},   /* Thomson SpeedTouch 121g */
85         {USB_DEVICE(0x0707, 0xee13)},   /* SMC 2862W-G version 2 */
86         {USB_DEVICE(0x07aa, 0x0020)},   /* Corega WLUSB2GTST USB */
87         {USB_DEVICE(0x0803, 0x4310)},   /* Zoom 4410a */
88         {USB_DEVICE(0x083a, 0x4521)},   /* Siemens Gigaset USB Adapter 54 version 2 */
89         {USB_DEVICE(0x083a, 0x4531)},   /* T-Com Sinus 154 data II */
90         {USB_DEVICE(0x083a, 0xc501)},   /* Zoom Wireless-G 4410 */
91         {USB_DEVICE(0x083a, 0xf503)},   /* Accton FD7050E ver 1010ec  */
92         {USB_DEVICE(0x0846, 0x4240)},   /* Netgear WG111 (v2) */
93         {USB_DEVICE(0x0915, 0x2000)},   /* Cohiba Proto board */
94         {USB_DEVICE(0x0915, 0x2002)},   /* Cohiba Proto board */
95         {USB_DEVICE(0x0baf, 0x0118)},   /* U.S. Robotics U5 802.11g Adapter*/
96         {USB_DEVICE(0x0bf8, 0x1009)},   /* FUJITSU E-5400 USB D1700*/
97         /* {USB_DEVICE(0x0cde, 0x0006)}, * Medion MD40900 already listed above,
98                                          * just noting it here for clarity */
99         {USB_DEVICE(0x0cde, 0x0008)},   /* Sagem XG703A */
100         {USB_DEVICE(0x0cde, 0x0015)},   /* Zcomax XG-705A */
101         {USB_DEVICE(0x0d8e, 0x3762)},   /* DLink DWL-G120 Cohiba */
102         {USB_DEVICE(0x124a, 0x4025)},   /* IOGear GWU513 (GW3887IK chip) */
103         {USB_DEVICE(0x1260, 0xee22)},   /* SMC 2862W-G version 2 */
104         {USB_DEVICE(0x13b1, 0x000a)},   /* Linksys WUSB54G ver 2 */
105         {USB_DEVICE(0x13B1, 0x000C)},   /* Linksys WUSB54AG */
106         {USB_DEVICE(0x1413, 0x5400)},   /* Telsey 802.11g USB2.0 Adapter */
107         {USB_DEVICE(0x1435, 0x0427)},   /* Inventel UR054G */
108         /* {USB_DEVICE(0x15a9, 0x0002)}, * Also SparkLAN WL-682 with 3887 */
109         {USB_DEVICE(0x1668, 0x1050)},   /* Actiontec 802UIG-1 */
110         {USB_DEVICE(0x1740, 0x1000)},   /* Senao NUB-350 */
111         {USB_DEVICE(0x2001, 0x3704)},   /* DLink DWL-G122 rev A2 */
112         {USB_DEVICE(0x2001, 0x3705)},   /* D-Link DWL-G120 rev C1 */
113         {USB_DEVICE(0x413c, 0x5513)},   /* Dell WLA3310 USB Wireless Adapter */
114         {USB_DEVICE(0x413c, 0x8102)},   /* Spinnaker DUT */
115         {USB_DEVICE(0x413c, 0x8104)},   /* Cohiba Proto board */
116         {}
117 };
118
119 MODULE_DEVICE_TABLE(usb, p54u_table);
120
121 static const struct {
122         u32 intf;
123         enum p54u_hw_type type;
124         const char *fw;
125         char hw[20];
126 } p54u_fwlist[__NUM_P54U_HWTYPES] = {
127         {
128                 .type = P54U_NET2280,
129                 .intf = FW_LM86,
130                 .fw = "isl3886usb",
131                 .hw = "ISL3886 + net2280",
132         },
133         {
134                 .type = P54U_3887,
135                 .intf = FW_LM87,
136                 .fw = "isl3887usb",
137                 .hw = "ISL3887",
138         },
139 };
140
141 static void p54u_rx_cb(struct urb *urb)
142 {
143         struct sk_buff *skb = (struct sk_buff *) urb->context;
144         struct p54u_rx_info *info = (struct p54u_rx_info *)skb->cb;
145         struct ieee80211_hw *dev = info->dev;
146         struct p54u_priv *priv = dev->priv;
147
148         skb_unlink(skb, &priv->rx_queue);
149
150         if (unlikely(urb->status)) {
151                 dev_kfree_skb_irq(skb);
152                 return;
153         }
154
155         skb_put(skb, urb->actual_length);
156
157         if (priv->hw_type == P54U_NET2280)
158                 skb_pull(skb, priv->common.tx_hdr_len);
159         if (priv->common.fw_interface == FW_LM87) {
160                 skb_pull(skb, 4);
161                 skb_put(skb, 4);
162         }
163
164         if (p54_rx(dev, skb)) {
165                 skb = dev_alloc_skb(priv->common.rx_mtu + 32);
166                 if (unlikely(!skb)) {
167                         /* TODO check rx queue length and refill *somewhere* */
168                         return;
169                 }
170
171                 info = (struct p54u_rx_info *) skb->cb;
172                 info->urb = urb;
173                 info->dev = dev;
174                 urb->transfer_buffer = skb_tail_pointer(skb);
175                 urb->context = skb;
176         } else {
177                 if (priv->hw_type == P54U_NET2280)
178                         skb_push(skb, priv->common.tx_hdr_len);
179                 if (priv->common.fw_interface == FW_LM87) {
180                         skb_push(skb, 4);
181                         skb_put(skb, 4);
182                 }
183                 skb_reset_tail_pointer(skb);
184                 skb_trim(skb, 0);
185                 urb->transfer_buffer = skb_tail_pointer(skb);
186         }
187         skb_queue_tail(&priv->rx_queue, skb);
188         usb_anchor_urb(urb, &priv->submitted);
189         if (usb_submit_urb(urb, GFP_ATOMIC)) {
190                 skb_unlink(skb, &priv->rx_queue);
191                 usb_unanchor_urb(urb);
192                 dev_kfree_skb_irq(skb);
193         }
194 }
195
196 static void p54u_tx_cb(struct urb *urb)
197 {
198         struct sk_buff *skb = urb->context;
199         struct ieee80211_hw *dev =
200                 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
201
202         p54_free_skb(dev, skb);
203 }
204
205 static void p54u_tx_dummy_cb(struct urb *urb) { }
206
207 static void p54u_free_urbs(struct ieee80211_hw *dev)
208 {
209         struct p54u_priv *priv = dev->priv;
210         usb_kill_anchored_urbs(&priv->submitted);
211 }
212
213 static void p54u_stop(struct ieee80211_hw *dev)
214 {
215         /*
216          * TODO: figure out how to reliably stop the 3887 and net2280 so
217          * the hardware is still usable next time we want to start it.
218          * until then, we just stop listening to the hardware..
219          */
220         p54u_free_urbs(dev);
221 }
222
223 static int p54u_init_urbs(struct ieee80211_hw *dev)
224 {
225         struct p54u_priv *priv = dev->priv;
226         struct urb *entry = NULL;
227         struct sk_buff *skb;
228         struct p54u_rx_info *info;
229         int ret = 0;
230
231         while (skb_queue_len(&priv->rx_queue) < 32) {
232                 skb = __dev_alloc_skb(priv->common.rx_mtu + 32, GFP_KERNEL);
233                 if (!skb) {
234                         ret = -ENOMEM;
235                         goto err;
236                 }
237                 entry = usb_alloc_urb(0, GFP_KERNEL);
238                 if (!entry) {
239                         ret = -ENOMEM;
240                         goto err;
241                 }
242
243                 usb_fill_bulk_urb(entry, priv->udev,
244                                   usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA),
245                                   skb_tail_pointer(skb),
246                                   priv->common.rx_mtu + 32, p54u_rx_cb, skb);
247                 info = (struct p54u_rx_info *) skb->cb;
248                 info->urb = entry;
249                 info->dev = dev;
250                 skb_queue_tail(&priv->rx_queue, skb);
251
252                 usb_anchor_urb(entry, &priv->submitted);
253                 ret = usb_submit_urb(entry, GFP_KERNEL);
254                 if (ret) {
255                         skb_unlink(skb, &priv->rx_queue);
256                         usb_unanchor_urb(entry);
257                         goto err;
258                 }
259                 usb_free_urb(entry);
260                 entry = NULL;
261         }
262
263         return 0;
264
265  err:
266         usb_free_urb(entry);
267         kfree_skb(skb);
268         p54u_free_urbs(dev);
269         return ret;
270 }
271
272 static int p54u_open(struct ieee80211_hw *dev)
273 {
274         /*
275          * TODO: Because we don't know how to reliably stop the 3887 and
276          * the isl3886+net2280, other than brutally cut off all
277          * communications. We have to reinitialize the urbs on every start.
278          */
279         return p54u_init_urbs(dev);
280 }
281
282 static __le32 p54u_lm87_chksum(const __le32 *data, size_t length)
283 {
284         u32 chk = 0;
285
286         length >>= 2;
287         while (length--) {
288                 chk ^= le32_to_cpu(*data++);
289                 chk = (chk >> 5) ^ (chk << 3);
290         }
291
292         return cpu_to_le32(chk);
293 }
294
295 static void p54u_tx_lm87(struct ieee80211_hw *dev, struct sk_buff *skb)
296 {
297         struct p54u_priv *priv = dev->priv;
298         struct urb *data_urb;
299         struct lm87_tx_hdr *hdr = (void *)skb->data - sizeof(*hdr);
300
301         data_urb = usb_alloc_urb(0, GFP_ATOMIC);
302         if (!data_urb) {
303                 p54_free_skb(dev, skb);
304                 return;
305         }
306
307         hdr->chksum = p54u_lm87_chksum((__le32 *)skb->data, skb->len);
308         hdr->device_addr = ((struct p54_hdr *)skb->data)->req_id;
309
310         usb_fill_bulk_urb(data_urb, priv->udev,
311                           usb_sndbulkpipe(priv->udev, P54U_PIPE_DATA),
312                           hdr, skb->len + sizeof(*hdr),  FREE_AFTER_TX(skb) ?
313                           p54u_tx_cb : p54u_tx_dummy_cb, skb);
314         data_urb->transfer_flags |= URB_ZERO_PACKET;
315
316         usb_anchor_urb(data_urb, &priv->submitted);
317         if (usb_submit_urb(data_urb, GFP_ATOMIC)) {
318                 usb_unanchor_urb(data_urb);
319                 p54_free_skb(dev, skb);
320         }
321         usb_free_urb(data_urb);
322 }
323
324 static void p54u_tx_net2280(struct ieee80211_hw *dev, struct sk_buff *skb)
325 {
326         struct p54u_priv *priv = dev->priv;
327         struct urb *int_urb = NULL, *data_urb = NULL;
328         struct net2280_tx_hdr *hdr = (void *)skb->data - sizeof(*hdr);
329         struct net2280_reg_write *reg = NULL;
330         int err = -ENOMEM;
331
332         reg = kmalloc(sizeof(*reg), GFP_ATOMIC);
333         if (!reg)
334                 goto out;
335
336         int_urb = usb_alloc_urb(0, GFP_ATOMIC);
337         if (!int_urb)
338                 goto out;
339
340         data_urb = usb_alloc_urb(0, GFP_ATOMIC);
341         if (!data_urb)
342                 goto out;
343
344         reg->port = cpu_to_le16(NET2280_DEV_U32);
345         reg->addr = cpu_to_le32(P54U_DEV_BASE);
346         reg->val = cpu_to_le32(ISL38XX_DEV_INT_DATA);
347
348         memset(hdr, 0, sizeof(*hdr));
349         hdr->len = cpu_to_le16(skb->len);
350         hdr->device_addr = ((struct p54_hdr *) skb->data)->req_id;
351
352         usb_fill_bulk_urb(int_urb, priv->udev,
353                 usb_sndbulkpipe(priv->udev, P54U_PIPE_DEV), reg, sizeof(*reg),
354                 p54u_tx_dummy_cb, dev);
355
356         /*
357          * URB_FREE_BUFFER triggers a code path in the USB subsystem that will
358          * free what is inside the transfer_buffer after the last reference to
359          * the int_urb is dropped.
360          */
361         int_urb->transfer_flags |= URB_FREE_BUFFER | URB_ZERO_PACKET;
362         reg = NULL;
363
364         usb_fill_bulk_urb(data_urb, priv->udev,
365                           usb_sndbulkpipe(priv->udev, P54U_PIPE_DATA),
366                           hdr, skb->len + sizeof(*hdr), FREE_AFTER_TX(skb) ?
367                           p54u_tx_cb : p54u_tx_dummy_cb, skb);
368         data_urb->transfer_flags |= URB_ZERO_PACKET;
369
370         usb_anchor_urb(int_urb, &priv->submitted);
371         err = usb_submit_urb(int_urb, GFP_ATOMIC);
372         if (err) {
373                 usb_unanchor_urb(int_urb);
374                 goto out;
375         }
376
377         usb_anchor_urb(data_urb, &priv->submitted);
378         err = usb_submit_urb(data_urb, GFP_ATOMIC);
379         if (err) {
380                 usb_unanchor_urb(data_urb);
381                 goto out;
382         }
383 out:
384         usb_free_urb(int_urb);
385         usb_free_urb(data_urb);
386
387         if (err) {
388                 kfree(reg);
389                 p54_free_skb(dev, skb);
390         }
391 }
392
393 static int p54u_write(struct p54u_priv *priv,
394                       struct net2280_reg_write *buf,
395                       enum net2280_op_type type,
396                       __le32 addr, __le32 val)
397 {
398         unsigned int ep;
399         int alen;
400
401         if (type & 0x0800)
402                 ep = usb_sndbulkpipe(priv->udev, P54U_PIPE_DEV);
403         else
404                 ep = usb_sndbulkpipe(priv->udev, P54U_PIPE_BRG);
405
406         buf->port = cpu_to_le16(type);
407         buf->addr = addr;
408         buf->val = val;
409
410         return usb_bulk_msg(priv->udev, ep, buf, sizeof(*buf), &alen, 1000);
411 }
412
413 static int p54u_read(struct p54u_priv *priv, void *buf,
414                      enum net2280_op_type type,
415                      __le32 addr, __le32 *val)
416 {
417         struct net2280_reg_read *read = buf;
418         __le32 *reg = buf;
419         unsigned int ep;
420         int alen, err;
421
422         if (type & 0x0800)
423                 ep = P54U_PIPE_DEV;
424         else
425                 ep = P54U_PIPE_BRG;
426
427         read->port = cpu_to_le16(type);
428         read->addr = addr;
429
430         err = usb_bulk_msg(priv->udev, usb_sndbulkpipe(priv->udev, ep),
431                            read, sizeof(*read), &alen, 1000);
432         if (err)
433                 return err;
434
435         err = usb_bulk_msg(priv->udev, usb_rcvbulkpipe(priv->udev, ep),
436                            reg, sizeof(*reg), &alen, 1000);
437         if (err)
438                 return err;
439
440         *val = *reg;
441         return 0;
442 }
443
444 static int p54u_bulk_msg(struct p54u_priv *priv, unsigned int ep,
445                          void *data, size_t len)
446 {
447         int alen;
448         return usb_bulk_msg(priv->udev, usb_sndbulkpipe(priv->udev, ep),
449                             data, len, &alen, 2000);
450 }
451
452 static int p54u_device_reset(struct ieee80211_hw *dev)
453 {
454         struct p54u_priv *priv = dev->priv;
455         int ret, lock = (priv->intf->condition != USB_INTERFACE_BINDING);
456
457         if (lock) {
458                 ret = usb_lock_device_for_reset(priv->udev, priv->intf);
459                 if (ret < 0) {
460                         dev_err(&priv->udev->dev, "(p54usb) unable to lock "
461                                 "device for reset (%d)!\n", ret);
462                         return ret;
463                 }
464         }
465
466         ret = usb_reset_device(priv->udev);
467         if (lock)
468                 usb_unlock_device(priv->udev);
469
470         if (ret)
471                 dev_err(&priv->udev->dev, "(p54usb) unable to reset "
472                         "device (%d)!\n", ret);
473
474         return ret;
475 }
476
477 static const char p54u_romboot_3887[] = "~~~~";
478 static int p54u_firmware_reset_3887(struct ieee80211_hw *dev)
479 {
480         struct p54u_priv *priv = dev->priv;
481         u8 *buf;
482         int ret;
483
484         buf = kmemdup(p54u_romboot_3887, 4, GFP_KERNEL);
485         if (!buf)
486                 return -ENOMEM;
487         ret = p54u_bulk_msg(priv, P54U_PIPE_DATA,
488                             buf, 4);
489         kfree(buf);
490         if (ret)
491                 dev_err(&priv->udev->dev, "(p54usb) unable to jump to "
492                         "boot ROM (%d)!\n", ret);
493
494         return ret;
495 }
496
497 static const char p54u_firmware_upload_3887[] = "<\r";
498 static int p54u_upload_firmware_3887(struct ieee80211_hw *dev)
499 {
500         struct p54u_priv *priv = dev->priv;
501         int err, alen;
502         u8 carry = 0;
503         u8 *buf, *tmp;
504         const u8 *data;
505         unsigned int left, remains, block_size;
506         struct x2_header *hdr;
507         unsigned long timeout;
508
509         err = p54u_firmware_reset_3887(dev);
510         if (err)
511                 return err;
512
513         tmp = buf = kmalloc(P54U_FW_BLOCK, GFP_KERNEL);
514         if (!buf)
515                 return -ENOMEM;
516
517         left = block_size = min((size_t)P54U_FW_BLOCK, priv->fw->size);
518         strcpy(buf, p54u_firmware_upload_3887);
519         left -= strlen(p54u_firmware_upload_3887);
520         tmp += strlen(p54u_firmware_upload_3887);
521
522         data = priv->fw->data;
523         remains = priv->fw->size;
524
525         hdr = (struct x2_header *)(buf + strlen(p54u_firmware_upload_3887));
526         memcpy(hdr->signature, X2_SIGNATURE, X2_SIGNATURE_SIZE);
527         hdr->fw_load_addr = cpu_to_le32(ISL38XX_DEV_FIRMWARE_ADDR);
528         hdr->fw_length = cpu_to_le32(priv->fw->size);
529         hdr->crc = cpu_to_le32(~crc32_le(~0, (void *)&hdr->fw_load_addr,
530                                          sizeof(u32)*2));
531         left -= sizeof(*hdr);
532         tmp += sizeof(*hdr);
533
534         while (remains) {
535                 while (left--) {
536                         if (carry) {
537                                 *tmp++ = carry;
538                                 carry = 0;
539                                 remains--;
540                                 continue;
541                         }
542                         switch (*data) {
543                         case '~':
544                                 *tmp++ = '}';
545                                 carry = '^';
546                                 break;
547                         case '}':
548                                 *tmp++ = '}';
549                                 carry = ']';
550                                 break;
551                         default:
552                                 *tmp++ = *data;
553                                 remains--;
554                                 break;
555                         }
556                         data++;
557                 }
558
559                 err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, block_size);
560                 if (err) {
561                         dev_err(&priv->udev->dev, "(p54usb) firmware "
562                                                   "upload failed!\n");
563                         goto err_upload_failed;
564                 }
565
566                 tmp = buf;
567                 left = block_size = min((unsigned int)P54U_FW_BLOCK, remains);
568         }
569
570         *((__le32 *)buf) = cpu_to_le32(~crc32_le(~0, priv->fw->data,
571                                                  priv->fw->size));
572         err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, sizeof(u32));
573         if (err) {
574                 dev_err(&priv->udev->dev, "(p54usb) firmware upload failed!\n");
575                 goto err_upload_failed;
576         }
577         timeout = jiffies + msecs_to_jiffies(1000);
578         while (!(err = usb_bulk_msg(priv->udev,
579                 usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), buf, 128, &alen, 1000))) {
580                 if (alen > 2 && !memcmp(buf, "OK", 2))
581                         break;
582
583                 if (alen > 5 && !memcmp(buf, "ERROR", 5)) {
584                         err = -EINVAL;
585                         break;
586                 }
587
588                 if (time_after(jiffies, timeout)) {
589                         dev_err(&priv->udev->dev, "(p54usb) firmware boot "
590                                                   "timed out!\n");
591                         err = -ETIMEDOUT;
592                         break;
593                 }
594         }
595         if (err) {
596                 dev_err(&priv->udev->dev, "(p54usb) firmware upload failed!\n");
597                 goto err_upload_failed;
598         }
599
600         buf[0] = 'g';
601         buf[1] = '\r';
602         err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, 2);
603         if (err) {
604                 dev_err(&priv->udev->dev, "(p54usb) firmware boot failed!\n");
605                 goto err_upload_failed;
606         }
607
608         timeout = jiffies + msecs_to_jiffies(1000);
609         while (!(err = usb_bulk_msg(priv->udev,
610                 usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), buf, 128, &alen, 1000))) {
611                 if (alen > 0 && buf[0] == 'g')
612                         break;
613
614                 if (time_after(jiffies, timeout)) {
615                         err = -ETIMEDOUT;
616                         break;
617                 }
618         }
619         if (err)
620                 goto err_upload_failed;
621
622 err_upload_failed:
623         kfree(buf);
624         return err;
625 }
626
627 static int p54u_upload_firmware_net2280(struct ieee80211_hw *dev)
628 {
629         struct p54u_priv *priv = dev->priv;
630         const struct p54p_csr *devreg = (const struct p54p_csr *) P54U_DEV_BASE;
631         int err, alen;
632         void *buf;
633         __le32 reg;
634         unsigned int remains, offset;
635         const u8 *data;
636
637         buf = kmalloc(512, GFP_KERNEL);
638         if (!buf)
639                 return -ENOMEM;
640
641 #define P54U_WRITE(type, addr, data) \
642         do {\
643                 err = p54u_write(priv, buf, type,\
644                                  cpu_to_le32((u32)(unsigned long)addr), data);\
645                 if (err) \
646                         goto fail;\
647         } while (0)
648
649 #define P54U_READ(type, addr) \
650         do {\
651                 err = p54u_read(priv, buf, type,\
652                                 cpu_to_le32((u32)(unsigned long)addr), &reg);\
653                 if (err)\
654                         goto fail;\
655         } while (0)
656
657         /* power down net2280 bridge */
658         P54U_READ(NET2280_BRG_U32, NET2280_GPIOCTL);
659         reg |= cpu_to_le32(P54U_BRG_POWER_DOWN);
660         reg &= cpu_to_le32(~P54U_BRG_POWER_UP);
661         P54U_WRITE(NET2280_BRG_U32, NET2280_GPIOCTL, reg);
662
663         mdelay(100);
664
665         /* power up bridge */
666         reg |= cpu_to_le32(P54U_BRG_POWER_UP);
667         reg &= cpu_to_le32(~P54U_BRG_POWER_DOWN);
668         P54U_WRITE(NET2280_BRG_U32, NET2280_GPIOCTL, reg);
669
670         mdelay(100);
671
672         P54U_WRITE(NET2280_BRG_U32, NET2280_DEVINIT,
673                    cpu_to_le32(NET2280_CLK_30Mhz |
674                                NET2280_PCI_ENABLE |
675                                NET2280_PCI_SOFT_RESET));
676
677         mdelay(20);
678
679         P54U_WRITE(NET2280_BRG_CFG_U16, PCI_COMMAND,
680                    cpu_to_le32(PCI_COMMAND_MEMORY |
681                                PCI_COMMAND_MASTER));
682
683         P54U_WRITE(NET2280_BRG_CFG_U32, PCI_BASE_ADDRESS_0,
684                    cpu_to_le32(NET2280_BASE));
685
686         P54U_READ(NET2280_BRG_CFG_U16, PCI_STATUS);
687         reg |= cpu_to_le32(PCI_STATUS_REC_MASTER_ABORT);
688         P54U_WRITE(NET2280_BRG_CFG_U16, PCI_STATUS, reg);
689
690         // TODO: we really need this?
691         P54U_READ(NET2280_BRG_U32, NET2280_RELNUM);
692
693         P54U_WRITE(NET2280_BRG_U32, NET2280_EPA_RSP,
694                    cpu_to_le32(NET2280_CLEAR_NAK_OUT_PACKETS_MODE));
695         P54U_WRITE(NET2280_BRG_U32, NET2280_EPC_RSP,
696                    cpu_to_le32(NET2280_CLEAR_NAK_OUT_PACKETS_MODE));
697
698         P54U_WRITE(NET2280_BRG_CFG_U32, PCI_BASE_ADDRESS_2,
699                    cpu_to_le32(NET2280_BASE2));
700
701         /* finally done setting up the bridge */
702
703         P54U_WRITE(NET2280_DEV_CFG_U16, 0x10000 | PCI_COMMAND,
704                    cpu_to_le32(PCI_COMMAND_MEMORY |
705                                PCI_COMMAND_MASTER));
706
707         P54U_WRITE(NET2280_DEV_CFG_U16, 0x10000 | 0x40 /* TRDY timeout */, 0);
708         P54U_WRITE(NET2280_DEV_CFG_U32, 0x10000 | PCI_BASE_ADDRESS_0,
709                    cpu_to_le32(P54U_DEV_BASE));
710
711         P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1, 0);
712         P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
713                    cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
714
715         /* do romboot */
716         P54U_WRITE(NET2280_DEV_U32, &devreg->int_enable, 0);
717
718         P54U_READ(NET2280_DEV_U32, &devreg->ctrl_stat);
719         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
720         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RAMBOOT);
721         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
722         P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
723
724         mdelay(20);
725
726         reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
727         P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
728
729         mdelay(20);
730
731         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
732         P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
733
734         mdelay(100);
735
736         P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
737         P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
738
739         /* finally, we can upload firmware now! */
740         remains = priv->fw->size;
741         data = priv->fw->data;
742         offset = ISL38XX_DEV_FIRMWARE_ADDR;
743
744         while (remains) {
745                 unsigned int block_len = min(remains, (unsigned int)512);
746                 memcpy(buf, data, block_len);
747
748                 err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, block_len);
749                 if (err) {
750                         dev_err(&priv->udev->dev, "(p54usb) firmware block "
751                                                   "upload failed\n");
752                         goto fail;
753                 }
754
755                 P54U_WRITE(NET2280_DEV_U32, &devreg->direct_mem_base,
756                            cpu_to_le32(0xc0000f00));
757
758                 P54U_WRITE(NET2280_DEV_U32,
759                            0x0020 | (unsigned long)&devreg->direct_mem_win, 0);
760                 P54U_WRITE(NET2280_DEV_U32,
761                            0x0020 | (unsigned long)&devreg->direct_mem_win,
762                            cpu_to_le32(1));
763
764                 P54U_WRITE(NET2280_DEV_U32,
765                            0x0024 | (unsigned long)&devreg->direct_mem_win,
766                            cpu_to_le32(block_len));
767                 P54U_WRITE(NET2280_DEV_U32,
768                            0x0028 | (unsigned long)&devreg->direct_mem_win,
769                            cpu_to_le32(offset));
770
771                 P54U_WRITE(NET2280_DEV_U32, &devreg->dma_addr,
772                            cpu_to_le32(NET2280_EPA_FIFO_PCI_ADDR));
773                 P54U_WRITE(NET2280_DEV_U32, &devreg->dma_len,
774                            cpu_to_le32(block_len >> 2));
775                 P54U_WRITE(NET2280_DEV_U32, &devreg->dma_ctrl,
776                            cpu_to_le32(ISL38XX_DMA_MASTER_CONTROL_TRIGGER));
777
778                 mdelay(10);
779
780                 P54U_READ(NET2280_DEV_U32,
781                           0x002C | (unsigned long)&devreg->direct_mem_win);
782                 if (!(reg & cpu_to_le32(ISL38XX_DMA_STATUS_DONE)) ||
783                     !(reg & cpu_to_le32(ISL38XX_DMA_STATUS_READY))) {
784                         dev_err(&priv->udev->dev, "(p54usb) firmware DMA "
785                                                   "transfer failed\n");
786                         goto fail;
787                 }
788
789                 P54U_WRITE(NET2280_BRG_U32, NET2280_EPA_STAT,
790                            cpu_to_le32(NET2280_FIFO_FLUSH));
791
792                 remains -= block_len;
793                 data += block_len;
794                 offset += block_len;
795         }
796
797         /* do ramboot */
798         P54U_READ(NET2280_DEV_U32, &devreg->ctrl_stat);
799         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
800         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
801         reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RAMBOOT);
802         P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
803
804         mdelay(20);
805
806         reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
807         P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
808
809         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
810         P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
811
812         mdelay(100);
813
814         P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
815         P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
816
817         /* start up the firmware */
818         P54U_WRITE(NET2280_DEV_U32, &devreg->int_enable,
819                    cpu_to_le32(ISL38XX_INT_IDENT_INIT));
820
821         P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
822                    cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
823
824         P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1,
825                    cpu_to_le32(NET2280_PCI_INTA_INTERRUPT_ENABLE |
826                                NET2280_USB_INTERRUPT_ENABLE));
827
828         P54U_WRITE(NET2280_DEV_U32, &devreg->dev_int,
829                    cpu_to_le32(ISL38XX_DEV_INT_RESET));
830
831         err = usb_interrupt_msg(priv->udev,
832                                 usb_rcvbulkpipe(priv->udev, P54U_PIPE_INT),
833                                 buf, sizeof(__le32), &alen, 1000);
834         if (err || alen != sizeof(__le32))
835                 goto fail;
836
837         P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
838         P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
839
840         if (!(reg & cpu_to_le32(ISL38XX_INT_IDENT_INIT)))
841                 err = -EINVAL;
842
843         P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1, 0);
844         P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
845                    cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
846
847 #undef P54U_WRITE
848 #undef P54U_READ
849
850 fail:
851         kfree(buf);
852         return err;
853 }
854
855 static int p54_find_type(struct p54u_priv *priv)
856 {
857         int i;
858
859         for (i = 0; i < __NUM_P54U_HWTYPES; i++)
860                 if (p54u_fwlist[i].type == priv->hw_type)
861                         break;
862         if (i == __NUM_P54U_HWTYPES)
863                 return -EOPNOTSUPP;
864
865         return i;
866 }
867
868 static int p54u_start_ops(struct p54u_priv *priv)
869 {
870         struct ieee80211_hw *dev = priv->common.hw;
871         int ret;
872
873         ret = p54_parse_firmware(dev, priv->fw);
874         if (ret)
875                 goto err_out;
876
877         ret = p54_find_type(priv);
878         if (ret < 0)
879                 goto err_out;
880
881         if (priv->common.fw_interface != p54u_fwlist[ret].intf) {
882                 dev_err(&priv->udev->dev, "wrong firmware, please get "
883                         "a firmware for \"%s\" and try again.\n",
884                         p54u_fwlist[ret].hw);
885                 ret = -ENODEV;
886                 goto err_out;
887         }
888
889         ret = priv->upload_fw(dev);
890         if (ret)
891                 goto err_out;
892
893         ret = p54u_open(dev);
894         if (ret)
895                 goto err_out;
896
897         ret = p54_read_eeprom(dev);
898         if (ret)
899                 goto err_stop;
900
901         p54u_stop(dev);
902
903         ret = p54_register_common(dev, &priv->udev->dev);
904         if (ret)
905                 goto err_stop;
906
907         return 0;
908
909 err_stop:
910         p54u_stop(dev);
911
912 err_out:
913         /*
914          * p54u_disconnect will do the rest of the
915          * cleanup
916          */
917         return ret;
918 }
919
920 static void p54u_load_firmware_cb(const struct firmware *firmware,
921                                   void *context)
922 {
923         struct p54u_priv *priv = context;
924         struct usb_device *udev = priv->udev;
925         int err;
926
927         complete(&priv->fw_wait_load);
928         if (firmware) {
929                 priv->fw = firmware;
930                 err = p54u_start_ops(priv);
931         } else {
932                 err = -ENOENT;
933                 dev_err(&udev->dev, "Firmware not found.\n");
934         }
935
936         if (err) {
937                 struct device *parent = priv->udev->dev.parent;
938
939                 dev_err(&udev->dev, "failed to initialize device (%d)\n", err);
940
941                 if (parent)
942                         device_lock(parent);
943
944                 device_release_driver(&udev->dev);
945                 /*
946                  * At this point p54u_disconnect has already freed
947                  * the "priv" context. Do not use it anymore!
948                  */
949                 priv = NULL;
950
951                 if (parent)
952                         device_unlock(parent);
953         }
954
955         usb_put_dev(udev);
956 }
957
958 static int p54u_load_firmware(struct ieee80211_hw *dev,
959                               struct usb_interface *intf)
960 {
961         struct usb_device *udev = interface_to_usbdev(intf);
962         struct p54u_priv *priv = dev->priv;
963         struct device *device = &udev->dev;
964         int err, i;
965
966         BUILD_BUG_ON(ARRAY_SIZE(p54u_fwlist) != __NUM_P54U_HWTYPES);
967
968         init_completion(&priv->fw_wait_load);
969         i = p54_find_type(priv);
970         if (i < 0)
971                 return i;
972
973         dev_info(&priv->udev->dev, "Loading firmware file %s\n",
974                p54u_fwlist[i].fw);
975
976         usb_get_dev(udev);
977         err = request_firmware_nowait(THIS_MODULE, 1, p54u_fwlist[i].fw,
978                                       device, GFP_KERNEL, priv,
979                                       p54u_load_firmware_cb);
980         if (err) {
981                 dev_err(&priv->udev->dev, "(p54usb) cannot load firmware %s "
982                                           "(%d)!\n", p54u_fwlist[i].fw, err);
983         }
984
985         return err;
986 }
987
988 static int p54u_probe(struct usb_interface *intf,
989                                 const struct usb_device_id *id)
990 {
991         struct usb_device *udev = interface_to_usbdev(intf);
992         struct ieee80211_hw *dev;
993         struct p54u_priv *priv;
994         int err;
995         unsigned int i, recognized_pipes;
996
997         dev = p54_init_common(sizeof(*priv));
998
999         if (!dev) {
1000                 dev_err(&udev->dev, "(p54usb) ieee80211 alloc failed\n");
1001                 return -ENOMEM;
1002         }
1003
1004         priv = dev->priv;
1005         priv->hw_type = P54U_INVALID_HW;
1006
1007         SET_IEEE80211_DEV(dev, &intf->dev);
1008         usb_set_intfdata(intf, dev);
1009         priv->udev = udev;
1010         priv->intf = intf;
1011         skb_queue_head_init(&priv->rx_queue);
1012         init_usb_anchor(&priv->submitted);
1013
1014         usb_get_dev(udev);
1015
1016         /* really lazy and simple way of figuring out if we're a 3887 */
1017         /* TODO: should just stick the identification in the device table */
1018         i = intf->altsetting->desc.bNumEndpoints;
1019         recognized_pipes = 0;
1020         while (i--) {
1021                 switch (intf->altsetting->endpoint[i].desc.bEndpointAddress) {
1022                 case P54U_PIPE_DATA:
1023                 case P54U_PIPE_MGMT:
1024                 case P54U_PIPE_BRG:
1025                 case P54U_PIPE_DEV:
1026                 case P54U_PIPE_DATA | USB_DIR_IN:
1027                 case P54U_PIPE_MGMT | USB_DIR_IN:
1028                 case P54U_PIPE_BRG | USB_DIR_IN:
1029                 case P54U_PIPE_DEV | USB_DIR_IN:
1030                 case P54U_PIPE_INT | USB_DIR_IN:
1031                         recognized_pipes++;
1032                 }
1033         }
1034         priv->common.open = p54u_open;
1035         priv->common.stop = p54u_stop;
1036         if (recognized_pipes < P54U_PIPE_NUMBER) {
1037 #ifdef CONFIG_PM
1038                 /* ISL3887 needs a full reset on resume */
1039                 udev->reset_resume = 1;
1040 #endif /* CONFIG_PM */
1041                 err = p54u_device_reset(dev);
1042
1043                 priv->hw_type = P54U_3887;
1044                 dev->extra_tx_headroom += sizeof(struct lm87_tx_hdr);
1045                 priv->common.tx_hdr_len = sizeof(struct lm87_tx_hdr);
1046                 priv->common.tx = p54u_tx_lm87;
1047                 priv->upload_fw = p54u_upload_firmware_3887;
1048         } else {
1049                 priv->hw_type = P54U_NET2280;
1050                 dev->extra_tx_headroom += sizeof(struct net2280_tx_hdr);
1051                 priv->common.tx_hdr_len = sizeof(struct net2280_tx_hdr);
1052                 priv->common.tx = p54u_tx_net2280;
1053                 priv->upload_fw = p54u_upload_firmware_net2280;
1054         }
1055         err = p54u_load_firmware(dev, intf);
1056         return err;
1057 }
1058
1059 static void p54u_disconnect(struct usb_interface *intf)
1060 {
1061         struct ieee80211_hw *dev = usb_get_intfdata(intf);
1062         struct p54u_priv *priv;
1063
1064         if (!dev)
1065                 return;
1066
1067         priv = dev->priv;
1068         wait_for_completion(&priv->fw_wait_load);
1069         p54_unregister_common(dev);
1070
1071         usb_put_dev(interface_to_usbdev(intf));
1072         release_firmware(priv->fw);
1073         p54_free_common(dev);
1074 }
1075
1076 static int p54u_pre_reset(struct usb_interface *intf)
1077 {
1078         struct ieee80211_hw *dev = usb_get_intfdata(intf);
1079
1080         if (!dev)
1081                 return -ENODEV;
1082
1083         p54u_stop(dev);
1084         return 0;
1085 }
1086
1087 static int p54u_resume(struct usb_interface *intf)
1088 {
1089         struct ieee80211_hw *dev = usb_get_intfdata(intf);
1090         struct p54u_priv *priv;
1091
1092         if (!dev)
1093                 return -ENODEV;
1094
1095         priv = dev->priv;
1096         if (unlikely(!(priv->upload_fw && priv->fw)))
1097                 return 0;
1098
1099         return priv->upload_fw(dev);
1100 }
1101
1102 static int p54u_post_reset(struct usb_interface *intf)
1103 {
1104         struct ieee80211_hw *dev = usb_get_intfdata(intf);
1105         struct p54u_priv *priv;
1106         int err;
1107
1108         err = p54u_resume(intf);
1109         if (err)
1110                 return err;
1111
1112         /* reinitialize old device state */
1113         priv = dev->priv;
1114         if (priv->common.mode != NL80211_IFTYPE_UNSPECIFIED)
1115                 ieee80211_restart_hw(dev);
1116
1117         return 0;
1118 }
1119
1120 #ifdef CONFIG_PM
1121
1122 static int p54u_suspend(struct usb_interface *intf, pm_message_t message)
1123 {
1124         return p54u_pre_reset(intf);
1125 }
1126
1127 #endif /* CONFIG_PM */
1128
1129 static struct usb_driver p54u_driver = {
1130         .name   = "p54usb",
1131         .id_table = p54u_table,
1132         .probe = p54u_probe,
1133         .disconnect = p54u_disconnect,
1134         .pre_reset = p54u_pre_reset,
1135         .post_reset = p54u_post_reset,
1136 #ifdef CONFIG_PM
1137         .suspend = p54u_suspend,
1138         .resume = p54u_resume,
1139         .reset_resume = p54u_resume,
1140 #endif /* CONFIG_PM */
1141         .soft_unbind = 1,
1142         .disable_hub_initiated_lpm = 1,
1143 };
1144
1145 module_usb_driver(p54u_driver);