Root/drivers/pcmcia/pcmcia_resource.c

1/*
2 * PCMCIA 16-bit resource management functions
3 *
4 * The initial developer of the original code is David A. Hinds
5 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
6 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
7 *
8 * Copyright (C) 1999 David A. Hinds
9 * Copyright (C) 2004-2005 Dominik Brodowski
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 */
16
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/interrupt.h>
20#include <linux/delay.h>
21#include <linux/pci.h>
22#include <linux/device.h>
23#include <linux/netdevice.h>
24#include <linux/slab.h>
25
26#include <pcmcia/cs_types.h>
27#include <pcmcia/ss.h>
28#include <pcmcia/cs.h>
29#include <pcmcia/cistpl.h>
30#include <pcmcia/cisreg.h>
31#include <pcmcia/ds.h>
32
33#include "cs_internal.h"
34
35
36/* Access speed for IO windows */
37static int io_speed;
38module_param(io_speed, int, 0444);
39
40
41#ifdef CONFIG_PCMCIA_PROBE
42#include <asm/irq.h>
43/* mask of IRQs already reserved by other cards, we should avoid using them */
44static u8 pcmcia_used_irq[NR_IRQS];
45#endif
46
47static int pcmcia_adjust_io_region(struct resource *res, unsigned long start,
48                   unsigned long end, struct pcmcia_socket *s)
49{
50    if (s->resource_ops->adjust_io_region)
51        return s->resource_ops->adjust_io_region(res, start, end, s);
52    return -ENOMEM;
53}
54
55static struct resource *pcmcia_find_io_region(unsigned long base, int num,
56                          unsigned long align,
57                          struct pcmcia_socket *s)
58{
59    if (s->resource_ops->find_io)
60        return s->resource_ops->find_io(base, num, align, s);
61    return NULL;
62}
63
64int pcmcia_validate_mem(struct pcmcia_socket *s)
65{
66    if (s->resource_ops->validate_mem)
67        return s->resource_ops->validate_mem(s);
68    /* if there is no callback, we can assume that everything is OK */
69    return 0;
70}
71
72struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
73                 int low, struct pcmcia_socket *s)
74{
75    if (s->resource_ops->find_mem)
76        return s->resource_ops->find_mem(base, num, align, low, s);
77    return NULL;
78}
79
80
81/** alloc_io_space
82 *
83 * Special stuff for managing IO windows, because they are scarce
84 */
85
86static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
87              unsigned int *base, unsigned int num, u_int lines)
88{
89    int i;
90    unsigned int try, align;
91
92    align = (*base) ? (lines ? 1<<lines : 0) : 1;
93    if (align && (align < num)) {
94        if (*base) {
95            dev_dbg(&s->dev, "odd IO request: num %#x align %#x\n",
96                   num, align);
97            align = 0;
98        } else
99            while (align && (align < num))
100                align <<= 1;
101    }
102    if (*base & ~(align-1)) {
103        dev_dbg(&s->dev, "odd IO request: base %#x align %#x\n",
104               *base, align);
105        align = 0;
106    }
107    if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
108        *base = s->io_offset | (*base & 0x0fff);
109        return 0;
110    }
111    /* Check for an already-allocated window that must conflict with
112     * what was asked for. It is a hack because it does not catch all
113     * potential conflicts, just the most obvious ones.
114     */
115    for (i = 0; i < MAX_IO_WIN; i++)
116        if ((s->io[i].res) && *base &&
117            ((s->io[i].res->start & (align-1)) == *base))
118            return 1;
119    for (i = 0; i < MAX_IO_WIN; i++) {
120        if (!s->io[i].res) {
121            s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
122            if (s->io[i].res) {
123                *base = s->io[i].res->start;
124                s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
125                s->io[i].InUse = num;
126                break;
127            } else
128                return 1;
129        } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
130            continue;
131        /* Try to extend top of window */
132        try = s->io[i].res->end + 1;
133        if ((*base == 0) || (*base == try))
134            if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
135                            s->io[i].res->end + num, s) == 0) {
136                *base = try;
137                s->io[i].InUse += num;
138                break;
139            }
140        /* Try to extend bottom of window */
141        try = s->io[i].res->start - num;
142        if ((*base == 0) || (*base == try))
143            if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
144                            s->io[i].res->end, s) == 0) {
145                *base = try;
146                s->io[i].InUse += num;
147                break;
148            }
149    }
150    return (i == MAX_IO_WIN);
151} /* alloc_io_space */
152
153
154static void release_io_space(struct pcmcia_socket *s, unsigned int base,
155                 unsigned int num)
156{
157    int i;
158
159    for (i = 0; i < MAX_IO_WIN; i++) {
160        if (!s->io[i].res)
161            continue;
162        if ((s->io[i].res->start <= base) &&
163            (s->io[i].res->end >= base+num-1)) {
164            s->io[i].InUse -= num;
165            /* Free the window if no one else is using it */
166            if (s->io[i].InUse == 0) {
167                release_resource(s->io[i].res);
168                kfree(s->io[i].res);
169                s->io[i].res = NULL;
170            }
171        }
172    }
173} /* release_io_space */
174
175
176/** pccard_access_configuration_register
177 *
178 * Access_configuration_register() reads and writes configuration
179 * registers in attribute memory. Memory window 0 is reserved for
180 * this and the tuple reading services.
181 */
182
183int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
184                     conf_reg_t *reg)
185{
186    struct pcmcia_socket *s;
187    config_t *c;
188    int addr;
189    u_char val;
190
191    if (!p_dev || !p_dev->function_config)
192        return -EINVAL;
193
194    s = p_dev->socket;
195
196    mutex_lock(&s->ops_mutex);
197    c = p_dev->function_config;
198
199    if (!(c->state & CONFIG_LOCKED)) {
200        dev_dbg(&s->dev, "Configuration isnt't locked\n");
201        mutex_unlock(&s->ops_mutex);
202        return -EACCES;
203    }
204
205    addr = (c->ConfigBase + reg->Offset) >> 1;
206    mutex_unlock(&s->ops_mutex);
207
208    switch (reg->Action) {
209    case CS_READ:
210        pcmcia_read_cis_mem(s, 1, addr, 1, &val);
211        reg->Value = val;
212        break;
213    case CS_WRITE:
214        val = reg->Value;
215        pcmcia_write_cis_mem(s, 1, addr, 1, &val);
216        break;
217    default:
218        dev_dbg(&s->dev, "Invalid conf register request\n");
219        return -EINVAL;
220        break;
221    }
222    return 0;
223} /* pcmcia_access_configuration_register */
224EXPORT_SYMBOL(pcmcia_access_configuration_register);
225
226
227int pcmcia_map_mem_page(struct pcmcia_device *p_dev, window_handle_t wh,
228            memreq_t *req)
229{
230    struct pcmcia_socket *s = p_dev->socket;
231    int ret;
232
233    wh--;
234    if (wh >= MAX_WIN)
235        return -EINVAL;
236    if (req->Page != 0) {
237        dev_dbg(&s->dev, "failure: requested page is zero\n");
238        return -EINVAL;
239    }
240    mutex_lock(&s->ops_mutex);
241    s->win[wh].card_start = req->CardOffset;
242    ret = s->ops->set_mem_map(s, &s->win[wh]);
243    if (ret)
244        dev_warn(&s->dev, "failed to set_mem_map\n");
245    mutex_unlock(&s->ops_mutex);
246    return ret;
247} /* pcmcia_map_mem_page */
248EXPORT_SYMBOL(pcmcia_map_mem_page);
249
250
251/** pcmcia_modify_configuration
252 *
253 * Modify a locked socket configuration
254 */
255int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
256                modconf_t *mod)
257{
258    struct pcmcia_socket *s;
259    config_t *c;
260    int ret;
261
262    s = p_dev->socket;
263
264    mutex_lock(&s->ops_mutex);
265    c = p_dev->function_config;
266
267    if (!(s->state & SOCKET_PRESENT)) {
268        dev_dbg(&s->dev, "No card present\n");
269        ret = -ENODEV;
270        goto unlock;
271    }
272    if (!(c->state & CONFIG_LOCKED)) {
273        dev_dbg(&s->dev, "Configuration isnt't locked\n");
274        ret = -EACCES;
275        goto unlock;
276    }
277
278    if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
279        if (mod->Attributes & CONF_ENABLE_IRQ) {
280            c->Attributes |= CONF_ENABLE_IRQ;
281            s->socket.io_irq = s->irq.AssignedIRQ;
282        } else {
283            c->Attributes &= ~CONF_ENABLE_IRQ;
284            s->socket.io_irq = 0;
285        }
286        s->ops->set_socket(s, &s->socket);
287    }
288
289    if (mod->Attributes & CONF_VCC_CHANGE_VALID) {
290        dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
291        ret = -EINVAL;
292        goto unlock;
293    }
294
295    /* We only allow changing Vpp1 and Vpp2 to the same value */
296    if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
297        (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
298        if (mod->Vpp1 != mod->Vpp2) {
299            dev_dbg(&s->dev, "Vpp1 and Vpp2 must be the same\n");
300            ret = -EINVAL;
301            goto unlock;
302        }
303        s->socket.Vpp = mod->Vpp1;
304        if (s->ops->set_socket(s, &s->socket)) {
305            dev_printk(KERN_WARNING, &s->dev,
306                   "Unable to set VPP\n");
307            ret = -EIO;
308            goto unlock;
309        }
310    } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
311           (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
312        dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
313        ret = -EINVAL;
314        goto unlock;
315    }
316
317    if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
318        pccard_io_map io_off = { 0, 0, 0, 0, 1 };
319        pccard_io_map io_on;
320        int i;
321
322        io_on.speed = io_speed;
323        for (i = 0; i < MAX_IO_WIN; i++) {
324            if (!s->io[i].res)
325                continue;
326            io_off.map = i;
327            io_on.map = i;
328
329            io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
330            io_on.start = s->io[i].res->start;
331            io_on.stop = s->io[i].res->end;
332
333            s->ops->set_io_map(s, &io_off);
334            mdelay(40);
335            s->ops->set_io_map(s, &io_on);
336        }
337    }
338    ret = 0;
339unlock:
340    mutex_unlock(&s->ops_mutex);
341
342    return ret;
343} /* modify_configuration */
344EXPORT_SYMBOL(pcmcia_modify_configuration);
345
346
347int pcmcia_release_configuration(struct pcmcia_device *p_dev)
348{
349    pccard_io_map io = { 0, 0, 0, 0, 1 };
350    struct pcmcia_socket *s = p_dev->socket;
351    config_t *c;
352    int i;
353
354    mutex_lock(&s->ops_mutex);
355    c = p_dev->function_config;
356    if (p_dev->_locked) {
357        p_dev->_locked = 0;
358        if (--(s->lock_count) == 0) {
359            s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
360            s->socket.Vpp = 0;
361            s->socket.io_irq = 0;
362            s->ops->set_socket(s, &s->socket);
363        }
364    }
365    if (c->state & CONFIG_LOCKED) {
366        c->state &= ~CONFIG_LOCKED;
367        if (c->state & CONFIG_IO_REQ)
368            for (i = 0; i < MAX_IO_WIN; i++) {
369                if (!s->io[i].res)
370                    continue;
371                s->io[i].Config--;
372                if (s->io[i].Config != 0)
373                    continue;
374                io.map = i;
375                s->ops->set_io_map(s, &io);
376            }
377    }
378    mutex_unlock(&s->ops_mutex);
379
380    return 0;
381} /* pcmcia_release_configuration */
382
383
384/** pcmcia_release_io
385 *
386 * Release_io() releases the I/O ranges allocated by a client. This
387 * may be invoked some time after a card ejection has already dumped
388 * the actual socket configuration, so if the client is "stale", we
389 * don't bother checking the port ranges against the current socket
390 * values.
391 */
392static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
393{
394    struct pcmcia_socket *s = p_dev->socket;
395    int ret = -EINVAL;
396    config_t *c;
397
398    mutex_lock(&s->ops_mutex);
399    c = p_dev->function_config;
400
401    if (!p_dev->_io)
402        goto out;
403
404    p_dev->_io = 0;
405
406    if ((c->io.BasePort1 != req->BasePort1) ||
407        (c->io.NumPorts1 != req->NumPorts1) ||
408        (c->io.BasePort2 != req->BasePort2) ||
409        (c->io.NumPorts2 != req->NumPorts2))
410        goto out;
411
412    c->state &= ~CONFIG_IO_REQ;
413
414    release_io_space(s, req->BasePort1, req->NumPorts1);
415    if (req->NumPorts2)
416        release_io_space(s, req->BasePort2, req->NumPorts2);
417
418out:
419    mutex_unlock(&s->ops_mutex);
420
421    return ret;
422} /* pcmcia_release_io */
423
424
425static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
426{
427    struct pcmcia_socket *s = p_dev->socket;
428    config_t *c;
429    int ret = -EINVAL;
430
431    mutex_lock(&s->ops_mutex);
432
433    c = p_dev->function_config;
434
435    if (!p_dev->_irq)
436        goto out;
437
438    p_dev->_irq = 0;
439
440    if (c->state & CONFIG_LOCKED)
441        goto out;
442
443    if (c->irq.Attributes != req->Attributes) {
444        dev_dbg(&s->dev, "IRQ attributes must match assigned ones\n");
445        goto out;
446    }
447    if (s->irq.AssignedIRQ != req->AssignedIRQ) {
448        dev_dbg(&s->dev, "IRQ must match assigned one\n");
449        goto out;
450    }
451    if (--s->irq.Config == 0) {
452        c->state &= ~CONFIG_IRQ_REQ;
453        s->irq.AssignedIRQ = 0;
454    }
455
456    if (req->Handler)
457        free_irq(req->AssignedIRQ, p_dev->priv);
458
459#ifdef CONFIG_PCMCIA_PROBE
460    pcmcia_used_irq[req->AssignedIRQ]--;
461#endif
462    ret = 0;
463
464out:
465    mutex_unlock(&s->ops_mutex);
466
467    return ret;
468} /* pcmcia_release_irq */
469
470
471int pcmcia_release_window(struct pcmcia_device *p_dev, window_handle_t wh)
472{
473    struct pcmcia_socket *s = p_dev->socket;
474    pccard_mem_map *win;
475
476    wh--;
477    if (wh >= MAX_WIN)
478        return -EINVAL;
479
480    mutex_lock(&s->ops_mutex);
481    win = &s->win[wh];
482
483    if (!(p_dev->_win & CLIENT_WIN_REQ(wh))) {
484        dev_dbg(&s->dev, "not releasing unknown window\n");
485        mutex_unlock(&s->ops_mutex);
486        return -EINVAL;
487    }
488
489    /* Shut down memory window */
490    win->flags &= ~MAP_ACTIVE;
491    s->ops->set_mem_map(s, win);
492    s->state &= ~SOCKET_WIN_REQ(wh);
493
494    /* Release system memory */
495    if (win->res) {
496        release_resource(win->res);
497        kfree(win->res);
498        win->res = NULL;
499    }
500    p_dev->_win &= ~CLIENT_WIN_REQ(wh);
501    mutex_unlock(&s->ops_mutex);
502
503    return 0;
504} /* pcmcia_release_window */
505EXPORT_SYMBOL(pcmcia_release_window);
506
507
508int pcmcia_request_configuration(struct pcmcia_device *p_dev,
509                 config_req_t *req)
510{
511    int i;
512    u_int base;
513    struct pcmcia_socket *s = p_dev->socket;
514    config_t *c;
515    pccard_io_map iomap;
516
517    if (!(s->state & SOCKET_PRESENT))
518        return -ENODEV;
519
520    if (req->IntType & INT_CARDBUS) {
521        dev_dbg(&s->dev, "IntType may not be INT_CARDBUS\n");
522        return -EINVAL;
523    }
524
525    mutex_lock(&s->ops_mutex);
526    c = p_dev->function_config;
527    if (c->state & CONFIG_LOCKED) {
528        mutex_unlock(&s->ops_mutex);
529        dev_dbg(&s->dev, "Configuration is locked\n");
530        return -EACCES;
531    }
532
533    /* Do power control. We don't allow changes in Vcc. */
534    s->socket.Vpp = req->Vpp;
535    if (s->ops->set_socket(s, &s->socket)) {
536        mutex_unlock(&s->ops_mutex);
537        dev_printk(KERN_WARNING, &s->dev,
538               "Unable to set socket state\n");
539        return -EINVAL;
540    }
541
542    /* Pick memory or I/O card, DMA mode, interrupt */
543    c->IntType = req->IntType;
544    c->Attributes = req->Attributes;
545    if (req->IntType & INT_MEMORY_AND_IO)
546        s->socket.flags |= SS_IOCARD;
547    if (req->IntType & INT_ZOOMED_VIDEO)
548        s->socket.flags |= SS_ZVCARD | SS_IOCARD;
549    if (req->Attributes & CONF_ENABLE_DMA)
550        s->socket.flags |= SS_DMA_MODE;
551    if (req->Attributes & CONF_ENABLE_SPKR)
552        s->socket.flags |= SS_SPKR_ENA;
553    if (req->Attributes & CONF_ENABLE_IRQ)
554        s->socket.io_irq = s->irq.AssignedIRQ;
555    else
556        s->socket.io_irq = 0;
557    s->ops->set_socket(s, &s->socket);
558    s->lock_count++;
559    mutex_unlock(&s->ops_mutex);
560
561    /* Set up CIS configuration registers */
562    base = c->ConfigBase = req->ConfigBase;
563    c->CardValues = req->Present;
564    if (req->Present & PRESENT_COPY) {
565        c->Copy = req->Copy;
566        pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
567    }
568    if (req->Present & PRESENT_OPTION) {
569        if (s->functions == 1) {
570            c->Option = req->ConfigIndex & COR_CONFIG_MASK;
571        } else {
572            c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
573            c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
574            if (req->Present & PRESENT_IOBASE_0)
575                c->Option |= COR_ADDR_DECODE;
576        }
577        if (c->state & CONFIG_IRQ_REQ)
578            if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
579                c->Option |= COR_LEVEL_REQ;
580        pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
581        mdelay(40);
582    }
583    if (req->Present & PRESENT_STATUS) {
584        c->Status = req->Status;
585        pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
586    }
587    if (req->Present & PRESENT_PIN_REPLACE) {
588        c->Pin = req->Pin;
589        pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
590    }
591    if (req->Present & PRESENT_EXT_STATUS) {
592        c->ExtStatus = req->ExtStatus;
593        pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
594    }
595    if (req->Present & PRESENT_IOBASE_0) {
596        u_char b = c->io.BasePort1 & 0xff;
597        pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
598        b = (c->io.BasePort1 >> 8) & 0xff;
599        pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
600    }
601    if (req->Present & PRESENT_IOSIZE) {
602        u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
603        pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
604    }
605
606    /* Configure I/O windows */
607    if (c->state & CONFIG_IO_REQ) {
608        mutex_lock(&s->ops_mutex);
609        iomap.speed = io_speed;
610        for (i = 0; i < MAX_IO_WIN; i++)
611            if (s->io[i].res) {
612                iomap.map = i;
613                iomap.flags = MAP_ACTIVE;
614                switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
615                case IO_DATA_PATH_WIDTH_16:
616                    iomap.flags |= MAP_16BIT; break;
617                case IO_DATA_PATH_WIDTH_AUTO:
618                    iomap.flags |= MAP_AUTOSZ; break;
619                default:
620                    break;
621                }
622                iomap.start = s->io[i].res->start;
623                iomap.stop = s->io[i].res->end;
624                s->ops->set_io_map(s, &iomap);
625                s->io[i].Config++;
626            }
627        mutex_unlock(&s->ops_mutex);
628    }
629
630    c->state |= CONFIG_LOCKED;
631    p_dev->_locked = 1;
632    return 0;
633} /* pcmcia_request_configuration */
634EXPORT_SYMBOL(pcmcia_request_configuration);
635
636
637/** pcmcia_request_io
638 *
639 * Request_io() reserves ranges of port addresses for a socket.
640 * I have not implemented range sharing or alias addressing.
641 */
642int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
643{
644    struct pcmcia_socket *s = p_dev->socket;
645    config_t *c;
646    int ret = -EINVAL;
647
648    mutex_lock(&s->ops_mutex);
649
650    if (!(s->state & SOCKET_PRESENT)) {
651        dev_dbg(&s->dev, "No card present\n");
652        goto out;
653    }
654
655    if (!req)
656        goto out;
657
658    c = p_dev->function_config;
659    if (c->state & CONFIG_LOCKED) {
660        dev_dbg(&s->dev, "Configuration is locked\n");
661        goto out;
662    }
663    if (c->state & CONFIG_IO_REQ) {
664        dev_dbg(&s->dev, "IO already configured\n");
665        goto out;
666    }
667    if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) {
668        dev_dbg(&s->dev, "bad attribute setting for IO region 1\n");
669        goto out;
670    }
671    if ((req->NumPorts2 > 0) &&
672        (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) {
673        dev_dbg(&s->dev, "bad attribute setting for IO region 2\n");
674        goto out;
675    }
676
677    dev_dbg(&s->dev, "trying to allocate resource 1\n");
678    ret = alloc_io_space(s, req->Attributes1, &req->BasePort1,
679                 req->NumPorts1, req->IOAddrLines);
680    if (ret) {
681        dev_dbg(&s->dev, "allocation of resource 1 failed\n");
682        goto out;
683    }
684
685    if (req->NumPorts2) {
686        dev_dbg(&s->dev, "trying to allocate resource 2\n");
687        ret = alloc_io_space(s, req->Attributes2, &req->BasePort2,
688                     req->NumPorts2, req->IOAddrLines);
689        if (ret) {
690            dev_dbg(&s->dev, "allocation of resource 2 failed\n");
691            release_io_space(s, req->BasePort1, req->NumPorts1);
692            goto out;
693        }
694    }
695
696    c->io = *req;
697    c->state |= CONFIG_IO_REQ;
698    p_dev->_io = 1;
699    dev_dbg(&s->dev, "allocating resources succeeded: %d\n", ret);
700
701out:
702    mutex_unlock(&s->ops_mutex);
703
704    return ret;
705} /* pcmcia_request_io */
706EXPORT_SYMBOL(pcmcia_request_io);
707
708
709/** pcmcia_request_irq
710 *
711 * Request_irq() reserves an irq for this client.
712 *
713 * Also, since Linux only reserves irq's when they are actually
714 * hooked, we don't guarantee that an irq will still be available
715 * when the configuration is locked. Now that I think about it,
716 * there might be a way to fix this using a dummy handler.
717 */
718
719#ifdef CONFIG_PCMCIA_PROBE
720static irqreturn_t test_action(int cpl, void *dev_id)
721{
722    return IRQ_NONE;
723}
724#endif
725
726int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
727{
728    struct pcmcia_socket *s = p_dev->socket;
729    config_t *c;
730    int ret = -EINVAL, irq = 0;
731    int type;
732
733    mutex_lock(&s->ops_mutex);
734
735    if (!(s->state & SOCKET_PRESENT)) {
736        dev_dbg(&s->dev, "No card present\n");
737        goto out;
738    }
739    c = p_dev->function_config;
740    if (c->state & CONFIG_LOCKED) {
741        dev_dbg(&s->dev, "Configuration is locked\n");
742        goto out;
743    }
744    if (c->state & CONFIG_IRQ_REQ) {
745        dev_dbg(&s->dev, "IRQ already configured\n");
746        goto out;
747    }
748
749    /* Decide what type of interrupt we are registering */
750    type = 0;
751    if (s->functions > 1) /* All of this ought to be handled higher up */
752        type = IRQF_SHARED;
753    else if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
754        type = IRQF_SHARED;
755    else
756        printk(KERN_WARNING "pcmcia: Driver needs updating to support IRQ sharing.\n");
757
758    /* If the interrupt is already assigned, it must be the same */
759    if (s->irq.AssignedIRQ != 0)
760        irq = s->irq.AssignedIRQ;
761
762#ifdef CONFIG_PCMCIA_PROBE
763    if (!irq) {
764        int try;
765        u32 mask = s->irq_mask;
766        void *data = p_dev; /* something unique to this device */
767
768        for (try = 0; try < 64; try++) {
769            irq = try % 32;
770
771            /* marked as available by driver, and not blocked by userspace? */
772            if (!((mask >> irq) & 1))
773                continue;
774
775            /* avoid an IRQ which is already used by a PCMCIA card */
776            if ((try < 32) && pcmcia_used_irq[irq])
777                continue;
778
779            /* register the correct driver, if possible, of check whether
780             * registering a dummy handle works, i.e. if the IRQ isn't
781             * marked as used by the kernel resource management core */
782            ret = request_irq(irq,
783                      (req->Handler) ? req->Handler : test_action,
784                      type,
785                      p_dev->devname,
786                      (req->Handler) ? p_dev->priv : data);
787            if (!ret) {
788                if (!req->Handler)
789                    free_irq(irq, data);
790                break;
791            }
792        }
793    }
794#endif
795    /* only assign PCI irq if no IRQ already assigned */
796    if (ret && !s->irq.AssignedIRQ) {
797        if (!s->pci_irq) {
798            dev_printk(KERN_INFO, &s->dev, "no IRQ found\n");
799            goto out;
800        }
801        type = IRQF_SHARED;
802        irq = s->pci_irq;
803    }
804
805    if (ret && req->Handler) {
806        ret = request_irq(irq, req->Handler, type,
807                  p_dev->devname, p_dev->priv);
808        if (ret) {
809            dev_printk(KERN_INFO, &s->dev,
810                "request_irq() failed\n");
811            goto out;
812        }
813    }
814
815    /* Make sure the fact the request type was overridden is passed back */
816    if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
817        req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
818        dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
819            "request for exclusive IRQ could not be fulfilled.\n");
820        dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
821            "needs updating to supported shared IRQ lines.\n");
822    }
823    c->irq.Attributes = req->Attributes;
824    s->irq.AssignedIRQ = req->AssignedIRQ = irq;
825    s->irq.Config++;
826
827    c->state |= CONFIG_IRQ_REQ;
828    p_dev->_irq = 1;
829
830#ifdef CONFIG_PCMCIA_PROBE
831    pcmcia_used_irq[irq]++;
832#endif
833
834    ret = 0;
835out:
836    mutex_unlock(&s->ops_mutex);
837    return ret;
838} /* pcmcia_request_irq */
839EXPORT_SYMBOL(pcmcia_request_irq);
840
841
842/** pcmcia_request_window
843 *
844 * Request_window() establishes a mapping between card memory space
845 * and system memory space.
846 */
847int pcmcia_request_window(struct pcmcia_device *p_dev, win_req_t *req, window_handle_t *wh)
848{
849    struct pcmcia_socket *s = p_dev->socket;
850    pccard_mem_map *win;
851    u_long align;
852    int w;
853
854    if (!(s->state & SOCKET_PRESENT)) {
855        dev_dbg(&s->dev, "No card present\n");
856        return -ENODEV;
857    }
858    if (req->Attributes & (WIN_PAGED | WIN_SHARED)) {
859        dev_dbg(&s->dev, "bad attribute setting for iomem region\n");
860        return -EINVAL;
861    }
862
863    /* Window size defaults to smallest available */
864    if (req->Size == 0)
865        req->Size = s->map_size;
866    align = (((s->features & SS_CAP_MEM_ALIGN) ||
867          (req->Attributes & WIN_STRICT_ALIGN)) ?
868         req->Size : s->map_size);
869    if (req->Size & (s->map_size-1)) {
870        dev_dbg(&s->dev, "invalid map size\n");
871        return -EINVAL;
872    }
873    if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
874        (req->Base & (align-1))) {
875        dev_dbg(&s->dev, "invalid base address\n");
876        return -EINVAL;
877    }
878    if (req->Base)
879        align = 0;
880
881    /* Allocate system memory window */
882    for (w = 0; w < MAX_WIN; w++)
883        if (!(s->state & SOCKET_WIN_REQ(w)))
884            break;
885    if (w == MAX_WIN) {
886        dev_dbg(&s->dev, "all windows are used already\n");
887        return -EINVAL;
888    }
889
890    mutex_lock(&s->ops_mutex);
891    win = &s->win[w];
892
893    if (!(s->features & SS_CAP_STATIC_MAP)) {
894        win->res = pcmcia_find_mem_region(req->Base, req->Size, align,
895                              (req->Attributes & WIN_MAP_BELOW_1MB), s);
896        if (!win->res) {
897            dev_dbg(&s->dev, "allocating mem region failed\n");
898            mutex_unlock(&s->ops_mutex);
899            return -EINVAL;
900        }
901    }
902    p_dev->_win |= CLIENT_WIN_REQ(w);
903
904    /* Configure the socket controller */
905    win->map = w+1;
906    win->flags = 0;
907    win->speed = req->AccessSpeed;
908    if (req->Attributes & WIN_MEMORY_TYPE)
909        win->flags |= MAP_ATTRIB;
910    if (req->Attributes & WIN_ENABLE)
911        win->flags |= MAP_ACTIVE;
912    if (req->Attributes & WIN_DATA_WIDTH_16)
913        win->flags |= MAP_16BIT;
914    if (req->Attributes & WIN_USE_WAIT)
915        win->flags |= MAP_USE_WAIT;
916    win->card_start = 0;
917
918    if (s->ops->set_mem_map(s, win) != 0) {
919        dev_dbg(&s->dev, "failed to set memory mapping\n");
920        mutex_unlock(&s->ops_mutex);
921        return -EIO;
922    }
923    s->state |= SOCKET_WIN_REQ(w);
924
925    /* Return window handle */
926    if (s->features & SS_CAP_STATIC_MAP)
927        req->Base = win->static_start;
928    else
929        req->Base = win->res->start;
930
931    mutex_unlock(&s->ops_mutex);
932    *wh = w + 1;
933
934    return 0;
935} /* pcmcia_request_window */
936EXPORT_SYMBOL(pcmcia_request_window);
937
938void pcmcia_disable_device(struct pcmcia_device *p_dev)
939{
940    pcmcia_release_configuration(p_dev);
941    pcmcia_release_io(p_dev, &p_dev->io);
942    pcmcia_release_irq(p_dev, &p_dev->irq);
943    if (p_dev->win)
944        pcmcia_release_window(p_dev, p_dev->win);
945}
946EXPORT_SYMBOL(pcmcia_disable_device);
947
948
949struct pcmcia_cfg_mem {
950    struct pcmcia_device *p_dev;
951    void *priv_data;
952    int (*conf_check) (struct pcmcia_device *p_dev,
953               cistpl_cftable_entry_t *cfg,
954               cistpl_cftable_entry_t *dflt,
955               unsigned int vcc,
956               void *priv_data);
957    cisparse_t parse;
958    cistpl_cftable_entry_t dflt;
959};
960
961/**
962 * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
963 *
964 * pcmcia_do_loop_config() is the internal callback for the call from
965 * pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
966 * by a struct pcmcia_cfg_mem.
967 */
968static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
969{
970    cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
971    struct pcmcia_cfg_mem *cfg_mem = priv;
972
973    /* default values */
974    cfg_mem->p_dev->conf.ConfigIndex = cfg->index;
975    if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
976        cfg_mem->dflt = *cfg;
977
978    return cfg_mem->conf_check(cfg_mem->p_dev, cfg, &cfg_mem->dflt,
979                   cfg_mem->p_dev->socket->socket.Vcc,
980                   cfg_mem->priv_data);
981}
982
983/**
984 * pcmcia_loop_config() - loop over configuration options
985 * @p_dev: the struct pcmcia_device which we need to loop for.
986 * @conf_check: function to call for each configuration option.
987 * It gets passed the struct pcmcia_device, the CIS data
988 * describing the configuration option, and private data
989 * being passed to pcmcia_loop_config()
990 * @priv_data: private data to be passed to the conf_check function.
991 *
992 * pcmcia_loop_config() loops over all configuration options, and calls
993 * the driver-specific conf_check() for each one, checking whether
994 * it is a valid one. Returns 0 on success or errorcode otherwise.
995 */
996int pcmcia_loop_config(struct pcmcia_device *p_dev,
997               int (*conf_check) (struct pcmcia_device *p_dev,
998                         cistpl_cftable_entry_t *cfg,
999                         cistpl_cftable_entry_t *dflt,
1000                         unsigned int vcc,
1001                         void *priv_data),
1002               void *priv_data)
1003{
1004    struct pcmcia_cfg_mem *cfg_mem;
1005    int ret;
1006
1007    cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
1008    if (cfg_mem == NULL)
1009        return -ENOMEM;
1010
1011    cfg_mem->p_dev = p_dev;
1012    cfg_mem->conf_check = conf_check;
1013    cfg_mem->priv_data = priv_data;
1014
1015    ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
1016                CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
1017                cfg_mem, pcmcia_do_loop_config);
1018
1019    kfree(cfg_mem);
1020    return ret;
1021}
1022EXPORT_SYMBOL(pcmcia_loop_config);
1023
1024
1025struct pcmcia_loop_mem {
1026    struct pcmcia_device *p_dev;
1027    void *priv_data;
1028    int (*loop_tuple) (struct pcmcia_device *p_dev,
1029               tuple_t *tuple,
1030               void *priv_data);
1031};
1032
1033/**
1034 * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
1035 *
1036 * pcmcia_do_loop_tuple() is the internal callback for the call from
1037 * pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred
1038 * by a struct pcmcia_cfg_mem.
1039 */
1040static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
1041{
1042    struct pcmcia_loop_mem *loop = priv;
1043
1044    return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
1045};
1046
1047/**
1048 * pcmcia_loop_tuple() - loop over tuples in the CIS
1049 * @p_dev: the struct pcmcia_device which we need to loop for.
1050 * @code: which CIS code shall we look for?
1051 * @priv_data: private data to be passed to the loop_tuple function.
1052 * @loop_tuple: function to call for each CIS entry of type @function. IT
1053 * gets passed the raw tuple and @priv_data.
1054 *
1055 * pcmcia_loop_tuple() loops over all CIS entries of type @function, and
1056 * calls the @loop_tuple function for each entry. If the call to @loop_tuple
1057 * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
1058 */
1059int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
1060              int (*loop_tuple) (struct pcmcia_device *p_dev,
1061                     tuple_t *tuple,
1062                     void *priv_data),
1063              void *priv_data)
1064{
1065    struct pcmcia_loop_mem loop = {
1066        .p_dev = p_dev,
1067        .loop_tuple = loop_tuple,
1068        .priv_data = priv_data};
1069
1070    return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
1071                 &loop, pcmcia_do_loop_tuple);
1072}
1073EXPORT_SYMBOL(pcmcia_loop_tuple);
1074
1075
1076struct pcmcia_loop_get {
1077    size_t len;
1078    cisdata_t **buf;
1079};
1080
1081/**
1082 * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
1083 *
1084 * pcmcia_do_get_tuple() is the internal callback for the call from
1085 * pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in
1086 * the first tuple, return 0 unconditionally. Create a memory buffer large
1087 * enough to hold the content of the tuple, and fill it with the tuple data.
1088 * The caller is responsible to free the buffer.
1089 */
1090static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple,
1091                   void *priv)
1092{
1093    struct pcmcia_loop_get *get = priv;
1094
1095    *get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL);
1096    if (*get->buf) {
1097        get->len = tuple->TupleDataLen;
1098        memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen);
1099    } else
1100        dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n");
1101    return 0;
1102}
1103
1104/**
1105 * pcmcia_get_tuple() - get first tuple from CIS
1106 * @p_dev: the struct pcmcia_device which we need to loop for.
1107 * @code: which CIS code shall we look for?
1108 * @buf: pointer to store the buffer to.
1109 *
1110 * pcmcia_get_tuple() gets the content of the first CIS entry of type @code.
1111 * It returns the buffer length (or zero). The caller is responsible to free
1112 * the buffer passed in @buf.
1113 */
1114size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
1115            unsigned char **buf)
1116{
1117    struct pcmcia_loop_get get = {
1118        .len = 0,
1119        .buf = buf,
1120    };
1121
1122    *get.buf = NULL;
1123    pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get);
1124
1125    return get.len;
1126}
1127EXPORT_SYMBOL(pcmcia_get_tuple);
1128
1129
1130/**
1131 * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis()
1132 *
1133 * pcmcia_do_get_mac() is the internal callback for the call from
1134 * pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the
1135 * tuple contains a proper LAN_NODE_ID of length 6, and copy the data
1136 * to struct net_device->dev_addr[i].
1137 */
1138static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple,
1139                 void *priv)
1140{
1141    struct net_device *dev = priv;
1142    int i;
1143
1144    if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
1145        return -EINVAL;
1146    if (tuple->TupleDataLen < ETH_ALEN + 2) {
1147        dev_warn(&p_dev->dev, "Invalid CIS tuple length for "
1148            "LAN_NODE_ID\n");
1149        return -EINVAL;
1150    }
1151
1152    if (tuple->TupleData[1] != ETH_ALEN) {
1153        dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n");
1154        return -EINVAL;
1155    }
1156    for (i = 0; i < 6; i++)
1157        dev->dev_addr[i] = tuple->TupleData[i+2];
1158    return 0;
1159}
1160
1161/**
1162 * pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE
1163 * @p_dev: the struct pcmcia_device for which we want the address.
1164 * @dev: a properly prepared struct net_device to store the info to.
1165 *
1166 * pcmcia_get_mac_from_cis() reads out the hardware MAC address from
1167 * CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which
1168 * must be set up properly by the driver (see examples!).
1169 */
1170int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev)
1171{
1172    return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev);
1173}
1174EXPORT_SYMBOL(pcmcia_get_mac_from_cis);
1175
1176

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