Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[linux-2.6] / drivers / net / wireless / libertas / if_cs.c
1 /*
2
3   Driver for the Marvell 8385 based compact flash WLAN cards.
4
5   (C) 2007 by Holger Schurig <hs4233@mail.mn-solutions.de>
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 2 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program; see the file COPYING.  If not, write to
19   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
20   Boston, MA 02110-1301, USA.
21
22 */
23
24 #include <linux/module.h>
25 #include <linux/delay.h>
26 #include <linux/moduleparam.h>
27 #include <linux/firmware.h>
28 #include <linux/netdevice.h>
29
30 #include <pcmcia/cs_types.h>
31 #include <pcmcia/cs.h>
32 #include <pcmcia/cistpl.h>
33 #include <pcmcia/ds.h>
34
35 #include <linux/io.h>
36
37 #define DRV_NAME "libertas_cs"
38
39 #include "decl.h"
40 #include "defs.h"
41 #include "dev.h"
42
43
44 /********************************************************************/
45 /* Module stuff                                                     */
46 /********************************************************************/
47
48 MODULE_AUTHOR("Holger Schurig <hs4233@mail.mn-solutions.de>");
49 MODULE_DESCRIPTION("Driver for Marvell 83xx compact flash WLAN cards");
50 MODULE_LICENSE("GPL");
51
52
53
54 /********************************************************************/
55 /* Data structures                                                  */
56 /********************************************************************/
57
58 struct if_cs_card {
59         struct pcmcia_device *p_dev;
60         wlan_private *priv;
61         void __iomem *iobase;
62 };
63
64
65
66 /********************************************************************/
67 /* Hardware access                                                  */
68 /********************************************************************/
69
70 /* This define enables wrapper functions which allow you
71    to dump all register accesses. You normally won't this,
72    except for development */
73 /* #define DEBUG_IO */
74
75 #ifdef DEBUG_IO
76 static int debug_output = 0;
77 #else
78 /* This way the compiler optimizes the printk's away */
79 #define debug_output 0
80 #endif
81
82 static inline unsigned int if_cs_read8(struct if_cs_card *card, uint reg)
83 {
84         unsigned int val = ioread8(card->iobase + reg);
85         if (debug_output)
86                 printk(KERN_INFO "##inb %08x<%02x\n", reg, val);
87         return val;
88 }
89 static inline unsigned int if_cs_read16(struct if_cs_card *card, uint reg)
90 {
91         unsigned int val = ioread16(card->iobase + reg);
92         if (debug_output)
93                 printk(KERN_INFO "##inw %08x<%04x\n", reg, val);
94         return val;
95 }
96 static inline void if_cs_read16_rep(
97         struct if_cs_card *card,
98         uint reg,
99         void *buf,
100         unsigned long count)
101 {
102         if (debug_output)
103                 printk(KERN_INFO "##insw %08x<(0x%lx words)\n",
104                         reg, count);
105         ioread16_rep(card->iobase + reg, buf, count);
106 }
107
108 static inline void if_cs_write8(struct if_cs_card *card, uint reg, u8 val)
109 {
110         if (debug_output)
111                 printk(KERN_INFO "##outb %08x>%02x\n", reg, val);
112         iowrite8(val, card->iobase + reg);
113 }
114
115 static inline void if_cs_write16(struct if_cs_card *card, uint reg, u16 val)
116 {
117         if (debug_output)
118                 printk(KERN_INFO "##outw %08x>%04x\n", reg, val);
119         iowrite16(val, card->iobase + reg);
120 }
121
122 static inline void if_cs_write16_rep(
123         struct if_cs_card *card,
124         uint reg,
125         void *buf,
126         unsigned long count)
127 {
128         if (debug_output)
129                 printk(KERN_INFO "##outsw %08x>(0x%lx words)\n",
130                         reg, count);
131         iowrite16_rep(card->iobase + reg, buf, count);
132 }
133
134
135 /*
136  * I know that polling/delaying is frowned upon. However, this procedure
137  * with polling is needed while downloading the firmware. At this stage,
138  * the hardware does unfortunately not create any interrupts.
139  *
140  * Fortunately, this function is never used once the firmware is in
141  * the card. :-)
142  *
143  * As a reference, see the "Firmware Specification v5.1", page 18
144  * and 19. I did not follow their suggested timing to the word,
145  * but this works nice & fast anyway.
146  */
147 static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 reg)
148 {
149         int i;
150
151         for (i = 0; i < 1000; i++) {
152                 u8 val = if_cs_read8(card, addr);
153                 if (val == reg)
154                         return i;
155                 udelay(500);
156         }
157         return -ETIME;
158 }
159
160
161
162 /* Host control registers and their bit definitions */
163
164 #define IF_CS_H_STATUS                  0x00000000
165 #define IF_CS_H_STATUS_TX_OVER          0x0001
166 #define IF_CS_H_STATUS_RX_OVER          0x0002
167 #define IF_CS_H_STATUS_DNLD_OVER        0x0004
168
169 #define IF_CS_H_INT_CAUSE               0x00000002
170 #define IF_CS_H_IC_TX_OVER              0x0001
171 #define IF_CS_H_IC_RX_OVER              0x0002
172 #define IF_CS_H_IC_DNLD_OVER            0x0004
173 #define IF_CS_H_IC_HOST_EVENT           0x0008
174 #define IF_CS_H_IC_MASK                 0x001f
175
176 #define IF_CS_H_INT_MASK                0x00000004
177 #define IF_CS_H_IM_MASK                 0x001f
178
179 #define IF_CS_H_WRITE_LEN               0x00000014
180
181 #define IF_CS_H_WRITE                   0x00000016
182
183 #define IF_CS_H_CMD_LEN                 0x00000018
184
185 #define IF_CS_H_CMD                     0x0000001A
186
187 #define IF_CS_C_READ_LEN                0x00000024
188
189 #define IF_CS_H_READ                    0x00000010
190
191 /* Card control registers and their bit definitions */
192
193 #define IF_CS_C_STATUS                  0x00000020
194 #define IF_CS_C_S_TX_DNLD_RDY           0x0001
195 #define IF_CS_C_S_RX_UPLD_RDY           0x0002
196 #define IF_CS_C_S_CMD_DNLD_RDY          0x0004
197 #define IF_CS_C_S_CMD_UPLD_RDY          0x0008
198 #define IF_CS_C_S_CARDEVENT             0x0010
199 #define IF_CS_C_S_MASK                  0x001f
200 #define IF_CS_C_S_STATUS_MASK           0x7f00
201 /* The following definitions should be the same as the MRVDRV_ ones */
202
203 #if MRVDRV_CMD_DNLD_RDY != IF_CS_C_S_CMD_DNLD_RDY
204 #error MRVDRV_CMD_DNLD_RDY and IF_CS_C_S_CMD_DNLD_RDY not in sync
205 #endif
206 #if MRVDRV_CMD_UPLD_RDY != IF_CS_C_S_CMD_UPLD_RDY
207 #error MRVDRV_CMD_UPLD_RDY and IF_CS_C_S_CMD_UPLD_RDY not in sync
208 #endif
209 #if MRVDRV_CARDEVENT != IF_CS_C_S_CARDEVENT
210 #error MRVDRV_CARDEVENT and IF_CS_C_S_CARDEVENT not in sync
211 #endif
212
213 #define IF_CS_C_INT_CAUSE               0x00000022
214 #define IF_CS_C_IC_MASK                 0x001f
215
216 #define IF_CS_C_SQ_READ_LOW             0x00000028
217 #define IF_CS_C_SQ_HELPER_OK            0x10
218
219 #define IF_CS_C_CMD_LEN                 0x00000030
220
221 #define IF_CS_C_CMD                     0x00000012
222
223 #define IF_CS_SCRATCH                   0x0000003F
224
225
226
227 /********************************************************************/
228 /* Interrupts                                                       */
229 /********************************************************************/
230
231 static inline void if_cs_enable_ints(struct if_cs_card *card)
232 {
233         lbs_deb_enter(LBS_DEB_CS);
234         if_cs_write16(card, IF_CS_H_INT_MASK, 0);
235 }
236
237 static inline void if_cs_disable_ints(struct if_cs_card *card)
238 {
239         lbs_deb_enter(LBS_DEB_CS);
240         if_cs_write16(card, IF_CS_H_INT_MASK, IF_CS_H_IM_MASK);
241 }
242
243 static irqreturn_t if_cs_interrupt(int irq, void *data)
244 {
245         struct if_cs_card *card = (struct if_cs_card *)data;
246         u16 int_cause;
247
248         lbs_deb_enter(LBS_DEB_CS);
249
250         int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE);
251         if(int_cause == 0x0) {
252                 /* Not for us */
253                 return IRQ_NONE;
254
255         } else if(int_cause == 0xffff) {
256                 /* Read in junk, the card has probably been removed */
257                 card->priv->adapter->surpriseremoved = 1;
258
259         } else {
260                 if(int_cause & IF_CS_H_IC_TX_OVER) {
261                         card->priv->dnld_sent = DNLD_RES_RECEIVED;
262                         if (!card->priv->adapter->cur_cmd)
263                                 wake_up_interruptible(&card->priv->waitq);
264
265                         if (card->priv->adapter->connect_status == LIBERTAS_CONNECTED)
266                                 netif_wake_queue(card->priv->dev);
267                 }
268
269                 /* clear interrupt */
270                 if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause & IF_CS_C_IC_MASK);
271         }
272
273         libertas_interrupt(card->priv->dev);
274
275         return IRQ_HANDLED;
276 }
277
278
279
280
281 /********************************************************************/
282 /* I/O                                                              */
283 /********************************************************************/
284
285 /*
286  * Called from if_cs_host_to_card to send a command to the hardware
287  */
288 static int if_cs_send_cmd(wlan_private *priv, u8 *buf, u16 nb)
289 {
290         struct if_cs_card *card = (struct if_cs_card *)priv->card;
291         int ret = -1;
292         int loops = 0;
293
294         lbs_deb_enter(LBS_DEB_CS);
295
296         /* Is hardware ready? */
297         while (1) {
298                 u16 val = if_cs_read16(card, IF_CS_C_STATUS);
299                 if (val & IF_CS_C_S_CMD_DNLD_RDY)
300                         break;
301                 if (++loops > 100) {
302                         lbs_pr_err("card not ready for commands\n");
303                         goto done;
304                 }
305                 mdelay(1);
306         }
307
308         if_cs_write16(card, IF_CS_H_CMD_LEN, nb);
309
310         if_cs_write16_rep(card, IF_CS_H_CMD, buf, nb / 2);
311         /* Are we supposed to transfer an odd amount of bytes? */
312         if (nb & 1)
313                 if_cs_write8(card, IF_CS_H_CMD, buf[nb-1]);
314
315         /* "Assert the download over interrupt command in the Host
316          * status register" */
317         if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
318
319         /* "Assert the download over interrupt command in the Card
320          * interrupt case register" */
321         if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
322         ret = 0;
323
324 done:
325         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
326         return ret;
327 }
328
329
330 /*
331  * Called from if_cs_host_to_card to send a data to the hardware
332  */
333 static void if_cs_send_data(wlan_private *priv, u8 *buf, u16 nb)
334 {
335         struct if_cs_card *card = (struct if_cs_card *)priv->card;
336
337         lbs_deb_enter(LBS_DEB_CS);
338
339         if_cs_write16(card, IF_CS_H_WRITE_LEN, nb);
340
341         /* write even number of bytes, then odd byte if necessary */
342         if_cs_write16_rep(card, IF_CS_H_WRITE, buf, nb / 2);
343         if (nb & 1)
344                 if_cs_write8(card, IF_CS_H_WRITE, buf[nb-1]);
345
346         if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_TX_OVER);
347         if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_STATUS_TX_OVER);
348
349         lbs_deb_leave(LBS_DEB_CS);
350 }
351
352
353 /*
354  * Get the command result out of the card.
355  */
356 static int if_cs_receive_cmdres(wlan_private *priv, u8* data, u32 *len)
357 {
358         int ret = -1;
359         u16 val;
360
361         lbs_deb_enter(LBS_DEB_CS);
362
363         /* is hardware ready? */
364         val = if_cs_read16(priv->card, IF_CS_C_STATUS);
365         if ((val & IF_CS_C_S_CMD_UPLD_RDY) == 0) {
366                 lbs_pr_err("card not ready for CMD\n");
367                 goto out;
368         }
369
370         *len = if_cs_read16(priv->card, IF_CS_C_CMD_LEN);
371         if ((*len == 0) || (*len > MRVDRV_SIZE_OF_CMD_BUFFER)) {
372                 lbs_pr_err("card cmd buffer has invalid # of bytes (%d)\n", *len);
373                 goto out;
374         }
375
376         /* read even number of bytes, then odd byte if necessary */
377         if_cs_read16_rep(priv->card, IF_CS_C_CMD, data, *len/sizeof(u16));
378         if (*len & 1)
379                 data[*len-1] = if_cs_read8(priv->card, IF_CS_C_CMD);
380
381         ret = 0;
382 out:
383         lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len);
384         return ret;
385 }
386
387
388 static struct sk_buff *if_cs_receive_data(wlan_private *priv)
389 {
390         struct sk_buff *skb = NULL;
391         u16 len;
392         u8 *data;
393
394         lbs_deb_enter(LBS_DEB_CS);
395
396         len = if_cs_read16(priv->card, IF_CS_C_READ_LEN);
397         if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
398                 lbs_pr_err("card data buffer has invalid # of bytes (%d)\n", len);
399                 priv->stats.rx_dropped++;
400                 printk(KERN_INFO "##HS %s:%d TODO\n", __FUNCTION__, __LINE__);
401                 goto dat_err;
402         }
403
404         //TODO: skb = dev_alloc_skb(len+ETH_FRAME_LEN+MRVDRV_SNAP_HEADER_LEN+EXTRA_LEN);
405         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + 2);
406         if (!skb)
407                 goto out;
408         skb_put(skb, len);
409         skb_reserve(skb, 2);/* 16 byte align */
410         data = skb->data;
411
412         /* read even number of bytes, then odd byte if necessary */
413         if_cs_read16_rep(priv->card, IF_CS_H_READ, data, len/sizeof(u16));
414         if (len & 1)
415                 data[len-1] = if_cs_read8(priv->card, IF_CS_H_READ);
416
417 dat_err:
418         if_cs_write16(priv->card, IF_CS_H_STATUS, IF_CS_H_STATUS_RX_OVER);
419         if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_RX_OVER);
420
421 out:
422         lbs_deb_leave_args(LBS_DEB_CS, "ret %p", skb);
423         return skb;
424 }
425
426
427
428 /********************************************************************/
429 /* Firmware                                                         */
430 /********************************************************************/
431
432 /*
433  * Tries to program the helper firmware.
434  *
435  * Return 0 on success
436  */
437 static int if_cs_prog_helper(struct if_cs_card *card)
438 {
439         int ret = 0;
440         int sent = 0;
441         u8  scratch;
442         const struct firmware *fw;
443
444         lbs_deb_enter(LBS_DEB_CS);
445
446         scratch = if_cs_read8(card, IF_CS_SCRATCH);
447
448         /* "If the value is 0x5a, the firmware is already
449          * downloaded successfully"
450          */
451         if (scratch == 0x5a)
452                 goto done;
453
454         /* "If the value is != 00, it is invalid value of register */
455         if (scratch != 0x00) {
456                 ret = -ENODEV;
457                 goto done;
458         }
459
460         /* TODO: make firmware file configurable */
461         ret = request_firmware(&fw, "libertas_cs_helper.fw",
462                 &handle_to_dev(card->p_dev));
463         if (ret) {
464                 lbs_pr_err("can't load helper firmware\n");
465                 ret = -ENODEV;
466                 goto done;
467         }
468         lbs_deb_cs("helper size %td\n", fw->size);
469
470         /* "Set the 5 bytes of the helper image to 0" */
471         /* Not needed, this contains an ARM branch instruction */
472
473         for (;;) {
474                 /* "the number of bytes to send is 256" */
475                 int count = 256;
476                 int remain = fw->size - sent;
477
478                 if (remain < count)
479                         count = remain;
480                 /* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
481                         __LINE__, sent, fw->size); */
482
483                 /* "write the number of bytes to be sent to the I/O Command
484                  * write length register" */
485                 if_cs_write16(card, IF_CS_H_CMD_LEN, count);
486
487                 /* "write this to I/O Command port register as 16 bit writes */
488                 if (count)
489                         if_cs_write16_rep(card, IF_CS_H_CMD,
490                                 &fw->data[sent],
491                                 count >> 1);
492
493                 /* "Assert the download over interrupt command in the Host
494                  * status register" */
495                 if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
496
497                 /* "Assert the download over interrupt command in the Card
498                  * interrupt case register" */
499                 if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
500
501                 /* "The host polls the Card Status register ... for 50 ms before
502                    declaring a failure */
503                 ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
504                         IF_CS_C_S_CMD_DNLD_RDY);
505                 if (ret < 0) {
506                         lbs_pr_err("can't download helper at 0x%x, ret %d\n",
507                                 sent, ret);
508                         goto done;
509                 }
510
511                 if (count == 0)
512                         break;
513
514                 sent += count;
515         }
516
517         release_firmware(fw);
518         ret = 0;
519
520 done:
521         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
522         return ret;
523 }
524
525
526 static int if_cs_prog_real(struct if_cs_card *card)
527 {
528         const struct firmware *fw;
529         int ret = 0;
530         int retry = 0;
531         int len = 0;
532         int sent;
533
534         lbs_deb_enter(LBS_DEB_CS);
535
536         /* TODO: make firmware file configurable */
537         ret = request_firmware(&fw, "libertas_cs.fw",
538                 &handle_to_dev(card->p_dev));
539         if (ret) {
540                 lbs_pr_err("can't load firmware\n");
541                 ret = -ENODEV;
542                 goto done;
543         }
544         lbs_deb_cs("fw size %td\n", fw->size);
545
546         ret = if_cs_poll_while_fw_download(card, IF_CS_C_SQ_READ_LOW, IF_CS_C_SQ_HELPER_OK);
547         if (ret < 0) {
548                 int i;
549                 lbs_pr_err("helper firmware doesn't answer\n");
550                 for (i = 0; i < 0x50; i += 2)
551                         printk(KERN_INFO "## HS %02x: %04x\n",
552                                 i, if_cs_read16(card, i));
553                 goto err_release;
554         }
555
556         for (sent = 0; sent < fw->size; sent += len) {
557                 len = if_cs_read16(card, IF_CS_C_SQ_READ_LOW);
558                 /* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
559                         __LINE__, sent, fw->size); */
560                 if (len & 1) {
561                         retry++;
562                         lbs_pr_info("odd, need to retry this firmware block\n");
563                 } else {
564                         retry = 0;
565                 }
566
567                 if (retry > 20) {
568                         lbs_pr_err("could not download firmware\n");
569                         ret = -ENODEV;
570                         goto err_release;
571                 }
572                 if (retry) {
573                         sent -= len;
574                 }
575
576
577                 if_cs_write16(card, IF_CS_H_CMD_LEN, len);
578
579                 if_cs_write16_rep(card, IF_CS_H_CMD,
580                         &fw->data[sent],
581                         (len+1) >> 1);
582                 if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
583                 if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
584
585                 ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
586                         IF_CS_C_S_CMD_DNLD_RDY);
587                 if (ret < 0) {
588                         lbs_pr_err("can't download firmware at 0x%x\n", sent);
589                         goto err_release;
590                 }
591         }
592
593         ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a);
594         if (ret < 0) {
595                 lbs_pr_err("firmware download failed\n");
596                 goto err_release;
597         }
598
599         ret = 0;
600         goto done;
601
602
603 err_release:
604         release_firmware(fw);
605
606 done:
607         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
608         return ret;
609 }
610
611
612
613 /********************************************************************/
614 /* Callback functions for libertas.ko                               */
615 /********************************************************************/
616
617 /* Send commands or data packets to the card */
618 static int if_cs_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)
619 {
620         int ret = -1;
621
622         lbs_deb_enter_args(LBS_DEB_CS, "type %d, bytes %d", type, nb);
623
624         switch (type) {
625         case MVMS_DAT:
626                 priv->dnld_sent = DNLD_DATA_SENT;
627                 if_cs_send_data(priv, buf, nb);
628                 ret = 0;
629                 break;
630         case MVMS_CMD:
631                 priv->dnld_sent = DNLD_CMD_SENT;
632                 ret = if_cs_send_cmd(priv, buf, nb);
633                 break;
634         default:
635                 lbs_pr_err("%s: unsupported type %d\n", __FUNCTION__, type);
636         }
637
638         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
639         return ret;
640 }
641
642
643 static int if_cs_get_int_status(wlan_private *priv, u8 *ireg)
644 {
645         struct if_cs_card *card = (struct if_cs_card *)priv->card;
646         //wlan_adapter *adapter = priv->adapter;
647         int ret = 0;
648         u16 int_cause;
649         u8 *cmdbuf;
650         *ireg = 0;
651
652         lbs_deb_enter(LBS_DEB_CS);
653
654         if (priv->adapter->surpriseremoved)
655                 goto out;
656
657         int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE) & IF_CS_C_IC_MASK;
658         if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause);
659
660         *ireg = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_S_MASK;
661
662         if (!*ireg)
663                 goto sbi_get_int_status_exit;
664
665 sbi_get_int_status_exit:
666
667         /* is there a data packet for us? */
668         if (*ireg & IF_CS_C_S_RX_UPLD_RDY) {
669                 struct sk_buff *skb = if_cs_receive_data(priv);
670                 libertas_process_rxed_packet(priv, skb);
671                 *ireg &= ~IF_CS_C_S_RX_UPLD_RDY;
672         }
673
674         if (*ireg & IF_CS_C_S_TX_DNLD_RDY) {
675                 priv->dnld_sent = DNLD_RES_RECEIVED;
676         }
677
678         /* Card has a command result for us */
679         if (*ireg & IF_CS_C_S_CMD_UPLD_RDY) {
680                 spin_lock(&priv->adapter->driver_lock);
681                 if (!priv->adapter->cur_cmd) {
682                         cmdbuf = priv->upld_buf;
683                         priv->adapter->hisregcpy &= ~IF_CS_C_S_RX_UPLD_RDY;
684                 } else {
685                         cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
686                 }
687
688                 ret = if_cs_receive_cmdres(priv, cmdbuf, &priv->upld_len);
689                 spin_unlock(&priv->adapter->driver_lock);
690                 if (ret < 0)
691                         lbs_pr_err("could not receive cmd from card\n");
692         }
693
694 out:
695         lbs_deb_leave_args(LBS_DEB_CS, "ret %d, ireg 0x%x, hisregcpy 0x%x", ret, *ireg, priv->adapter->hisregcpy);
696         return ret;
697 }
698
699
700 static int if_cs_read_event_cause(wlan_private *priv)
701 {
702         lbs_deb_enter(LBS_DEB_CS);
703
704         priv->adapter->eventcause = (if_cs_read16(priv->card, IF_CS_C_STATUS) & IF_CS_C_S_STATUS_MASK) >> 5;
705         if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_HOST_EVENT);
706
707         return 0;
708 }
709
710
711
712 /********************************************************************/
713 /* Card Services                                                    */
714 /********************************************************************/
715
716 /*
717  * After a card is removed, if_cs_release() will unregister the
718  * device, and release the PCMCIA configuration.  If the device is
719  * still open, this will be postponed until it is closed.
720  */
721 static void if_cs_release(struct pcmcia_device *p_dev)
722 {
723         struct if_cs_card *card = p_dev->priv;
724
725         lbs_deb_enter(LBS_DEB_CS);
726
727         pcmcia_disable_device(p_dev);
728         free_irq(p_dev->irq.AssignedIRQ, card);
729         if (card->iobase)
730                 ioport_unmap(card->iobase);
731
732         lbs_deb_leave(LBS_DEB_CS);
733 }
734
735
736 /*
737  * This creates an "instance" of the driver, allocating local data
738  * structures for one device.  The device is registered with Card
739  * Services.
740  *
741  * The dev_link structure is initialized, but we don't actually
742  * configure the card at this point -- we wait until we receive a card
743  * insertion event.
744  */
745 static int if_cs_probe(struct pcmcia_device *p_dev)
746 {
747         int ret = -ENOMEM;
748         wlan_private *priv;
749         struct if_cs_card *card;
750         /* CIS parsing */
751         tuple_t tuple;
752         cisparse_t parse;
753         cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
754         cistpl_io_t *io = &cfg->io;
755         u_char buf[64];
756
757         lbs_deb_enter(LBS_DEB_CS);
758
759         card = kzalloc(sizeof(struct if_cs_card), GFP_KERNEL);
760         if (!card) {
761                 lbs_pr_err("error in kzalloc\n");
762                 goto out;
763         }
764         card->p_dev = p_dev;
765         p_dev->priv = card;
766
767         p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
768         p_dev->irq.Handler = NULL;
769         p_dev->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
770
771         p_dev->conf.Attributes = 0;
772         p_dev->conf.IntType = INT_MEMORY_AND_IO;
773
774         tuple.Attributes = 0;
775         tuple.TupleData = buf;
776         tuple.TupleDataMax = sizeof(buf);
777         tuple.TupleOffset = 0;
778
779         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
780         if ((ret = pcmcia_get_first_tuple(p_dev, &tuple)) != 0 ||
781             (ret = pcmcia_get_tuple_data(p_dev, &tuple)) != 0 ||
782             (ret = pcmcia_parse_tuple(p_dev, &tuple, &parse)) != 0)
783         {
784                 lbs_pr_err("error in pcmcia_get_first_tuple etc\n");
785                 goto out1;
786         }
787
788         p_dev->conf.ConfigIndex = cfg->index;
789
790         /* Do we need to allocate an interrupt? */
791         if (cfg->irq.IRQInfo1) {
792                 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
793         }
794
795         /* IO window settings */
796         if (cfg->io.nwin != 1) {
797                 lbs_pr_err("wrong CIS (check number of IO windows)\n");
798                 ret = -ENODEV;
799                 goto out1;
800         }
801         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
802         p_dev->io.BasePort1 = io->win[0].base;
803         p_dev->io.NumPorts1 = io->win[0].len;
804
805         /* This reserves IO space but doesn't actually enable it */
806         ret = pcmcia_request_io(p_dev, &p_dev->io);
807         if (ret) {
808                 lbs_pr_err("error in pcmcia_request_io\n");
809                 goto out1;
810         }
811
812         /*
813          * Allocate an interrupt line.  Note that this does not assign
814          * a handler to the interrupt, unless the 'Handler' member of
815          * the irq structure is initialized.
816          */
817         if (p_dev->conf.Attributes & CONF_ENABLE_IRQ) {
818                 ret = pcmcia_request_irq(p_dev, &p_dev->irq);
819                 if (ret) {
820                         lbs_pr_err("error in pcmcia_request_irq\n");
821                         goto out1;
822                 }
823         }
824
825         /* Initialize io access */
826         card->iobase = ioport_map(p_dev->io.BasePort1, p_dev->io.NumPorts1);
827         if (!card->iobase) {
828                 lbs_pr_err("error in ioport_map\n");
829                 ret = -EIO;
830                 goto out1;
831         }
832
833         /*
834          * This actually configures the PCMCIA socket -- setting up
835          * the I/O windows and the interrupt mapping, and putting the
836          * card and host interface into "Memory and IO" mode.
837          */
838         ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
839         if (ret) {
840                 lbs_pr_err("error in pcmcia_request_configuration\n");
841                 goto out2;
842         }
843
844         /* Finally, report what we've done */
845         lbs_deb_cs("irq %d, io 0x%04x-0x%04x\n",
846                p_dev->irq.AssignedIRQ, p_dev->io.BasePort1,
847                p_dev->io.BasePort1 + p_dev->io.NumPorts1 - 1);
848
849
850         /* Load the firmware early, before calling into libertas.ko */
851         ret = if_cs_prog_helper(card);
852         if (ret == 0)
853                 ret = if_cs_prog_real(card);
854         if (ret)
855                 goto out2;
856
857         /* Make this card known to the libertas driver */
858         priv = libertas_add_card(card, &p_dev->dev);
859         if (!priv) {
860                 ret = -ENOMEM;
861                 goto out2;
862         }
863
864         /* Store pointers to our call-back functions */
865         card->priv = priv;
866         priv->card = card;
867         priv->hw_host_to_card     = if_cs_host_to_card;
868         priv->hw_get_int_status   = if_cs_get_int_status;
869         priv->hw_read_event_cause = if_cs_read_event_cause;
870
871         priv->adapter->fw_ready = 1;
872
873         /* Now actually get the IRQ */
874         ret = request_irq(p_dev->irq.AssignedIRQ, if_cs_interrupt,
875                 IRQF_SHARED, DRV_NAME, card);
876         if (ret) {
877                 lbs_pr_err("error in request_irq\n");
878                 goto out3;
879         }
880
881         /* Clear any interrupt cause that happend while sending
882          * firmware/initializing card */
883         if_cs_write16(card, IF_CS_C_INT_CAUSE, IF_CS_C_IC_MASK);
884         if_cs_enable_ints(card);
885
886         /* And finally bring the card up */
887         if (libertas_start_card(priv) != 0) {
888                 lbs_pr_err("could not activate card\n");
889                 goto out3;
890         }
891
892         ret = 0;
893         goto out;
894
895 out3:
896         libertas_remove_card(priv);
897 out2:
898         ioport_unmap(card->iobase);
899 out1:
900         pcmcia_disable_device(p_dev);
901 out:
902         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
903         return ret;
904 }
905
906
907 /*
908  * This deletes a driver "instance".  The device is de-registered with
909  * Card Services.  If it has been released, all local data structures
910  * are freed.  Otherwise, the structures will be freed when the device
911  * is released.
912  */
913 static void if_cs_detach(struct pcmcia_device *p_dev)
914 {
915         struct if_cs_card *card = p_dev->priv;
916
917         lbs_deb_enter(LBS_DEB_CS);
918
919         libertas_stop_card(card->priv);
920         libertas_remove_card(card->priv);
921         if_cs_disable_ints(card);
922         if_cs_release(p_dev);
923         kfree(card);
924
925         lbs_deb_leave(LBS_DEB_CS);
926 }
927
928
929
930 /********************************************************************/
931 /* Module initialization                                            */
932 /********************************************************************/
933
934 static struct pcmcia_device_id if_cs_ids[] = {
935         PCMCIA_DEVICE_MANF_CARD(0x02df, 0x8103),
936         PCMCIA_DEVICE_NULL,
937 };
938 MODULE_DEVICE_TABLE(pcmcia, if_cs_ids);
939
940
941 static struct pcmcia_driver libertas_driver = {
942         .owner          = THIS_MODULE,
943         .drv            = {
944                 .name   = DRV_NAME,
945         },
946         .probe          = if_cs_probe,
947         .remove         = if_cs_detach,
948         .id_table       = if_cs_ids,
949 };
950
951
952 static int __init if_cs_init(void)
953 {
954         int ret;
955
956         lbs_deb_enter(LBS_DEB_CS);
957         ret = pcmcia_register_driver(&libertas_driver);
958         lbs_deb_leave(LBS_DEB_CS);
959         return ret;
960 }
961
962
963 static void __exit if_cs_exit(void)
964 {
965         lbs_deb_enter(LBS_DEB_CS);
966         pcmcia_unregister_driver(&libertas_driver);
967         lbs_deb_leave(LBS_DEB_CS);
968 }
969
970
971 module_init(if_cs_init);
972 module_exit(if_cs_exit);