Root/sound/ppc/pmac.c

1/*
2 * PMac DBDMA lowlevel functions
3 *
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
5 * code based on dmasound.c.
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; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22
23#include <asm/io.h>
24#include <asm/irq.h>
25#include <linux/init.h>
26#include <linux/delay.h>
27#include <linux/slab.h>
28#include <linux/interrupt.h>
29#include <linux/pci.h>
30#include <linux/dma-mapping.h>
31#include <sound/core.h>
32#include "pmac.h"
33#include <sound/pcm_params.h>
34#include <asm/pmac_feature.h>
35#include <asm/pci-bridge.h>
36
37
38/* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
39static int awacs_freqs[8] = {
40    44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
41};
42/* fixed frequency table for tumbler */
43static int tumbler_freqs[1] = {
44    44100
45};
46
47
48/*
49 * we will allocate a single 'emergency' dbdma cmd block to use if the
50 * tx status comes up "DEAD". This happens on some PowerComputing Pmac
51 * clones, either owing to a bug in dbdma or some interaction between
52 * IDE and sound. However, this measure would deal with DEAD status if
53 * it appeared elsewhere.
54 */
55static struct pmac_dbdma emergency_dbdma;
56static int emergency_in_use;
57
58
59/*
60 * allocate DBDMA command arrays
61 */
62static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
63{
64    unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
65
66    rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
67                    &rec->dma_base, GFP_KERNEL);
68    if (rec->space == NULL)
69        return -ENOMEM;
70    rec->size = size;
71    memset(rec->space, 0, rsize);
72    rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
73    rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);
74
75    return 0;
76}
77
78static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
79{
80    if (rec->space) {
81        unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);
82
83        dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
84    }
85}
86
87
88/*
89 * pcm stuff
90 */
91
92/*
93 * look up frequency table
94 */
95
96unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
97{
98    int i, ok, found;
99
100    ok = rec->cur_freqs;
101    if (rate > chip->freq_table[0])
102        return 0;
103    found = 0;
104    for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
105        if (! (ok & 1)) continue;
106        found = i;
107        if (rate >= chip->freq_table[i])
108            break;
109    }
110    return found;
111}
112
113/*
114 * check whether another stream is active
115 */
116static inline int another_stream(int stream)
117{
118    return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
119        SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
120}
121
122/*
123 * allocate buffers
124 */
125static int snd_pmac_pcm_hw_params(struct snd_pcm_substream *subs,
126                  struct snd_pcm_hw_params *hw_params)
127{
128    return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
129}
130
131/*
132 * release buffers
133 */
134static int snd_pmac_pcm_hw_free(struct snd_pcm_substream *subs)
135{
136    snd_pcm_lib_free_pages(subs);
137    return 0;
138}
139
140/*
141 * get a stream of the opposite direction
142 */
143static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
144{
145    switch (stream) {
146    case SNDRV_PCM_STREAM_PLAYBACK:
147        return &chip->playback;
148    case SNDRV_PCM_STREAM_CAPTURE:
149        return &chip->capture;
150    default:
151        snd_BUG();
152        return NULL;
153    }
154}
155
156/*
157 * wait while run status is on
158 */
159static inline void
160snd_pmac_wait_ack(struct pmac_stream *rec)
161{
162    int timeout = 50000;
163    while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
164        udelay(1);
165}
166
167/*
168 * set the format and rate to the chip.
169 * call the lowlevel function if defined (e.g. for AWACS).
170 */
171static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
172{
173    /* set up frequency and format */
174    out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
175    out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
176    if (chip->set_format)
177        chip->set_format(chip);
178}
179
180/*
181 * stop the DMA transfer
182 */
183static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
184{
185    out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
186    snd_pmac_wait_ack(rec);
187}
188
189/*
190 * set the command pointer address
191 */
192static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
193{
194    out_le32(&rec->dma->cmdptr, cmd->addr);
195}
196
197/*
198 * start the DMA
199 */
200static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
201{
202    out_le32(&rec->dma->control, status | (status << 16));
203}
204
205
206/*
207 * prepare playback/capture stream
208 */
209static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
210{
211    int i;
212    volatile struct dbdma_cmd __iomem *cp;
213    struct snd_pcm_runtime *runtime = subs->runtime;
214    int rate_index;
215    long offset;
216    struct pmac_stream *astr;
217
218    rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
219    rec->period_size = snd_pcm_lib_period_bytes(subs);
220    rec->nperiods = rec->dma_size / rec->period_size;
221    rec->cur_period = 0;
222    rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
223
224    /* set up constraints */
225    astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
226    if (! astr)
227        return -EINVAL;
228    astr->cur_freqs = 1 << rate_index;
229    astr->cur_formats = 1 << runtime->format;
230    chip->rate_index = rate_index;
231    chip->format = runtime->format;
232
233    /* We really want to execute a DMA stop command, after the AWACS
234     * is initialized.
235     * For reasons I don't understand, it stops the hissing noise
236     * common to many PowerBook G3 systems and random noise otherwise
237     * captured on iBook2's about every third time. -ReneR
238     */
239    spin_lock_irq(&chip->reg_lock);
240    snd_pmac_dma_stop(rec);
241    st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
242    snd_pmac_dma_set_command(rec, &chip->extra_dma);
243    snd_pmac_dma_run(rec, RUN);
244    spin_unlock_irq(&chip->reg_lock);
245    mdelay(5);
246    spin_lock_irq(&chip->reg_lock);
247    /* continuous DMA memory type doesn't provide the physical address,
248     * so we need to resolve the address here...
249     */
250    offset = runtime->dma_addr;
251    for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
252        st_le32(&cp->phy_addr, offset);
253        st_le16(&cp->req_count, rec->period_size);
254        /*st_le16(&cp->res_count, 0);*/
255        st_le16(&cp->xfer_status, 0);
256        offset += rec->period_size;
257    }
258    /* make loop */
259    st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
260    st_le32(&cp->cmd_dep, rec->cmd.addr);
261
262    snd_pmac_dma_stop(rec);
263    snd_pmac_dma_set_command(rec, &rec->cmd);
264    spin_unlock_irq(&chip->reg_lock);
265
266    return 0;
267}
268
269
270/*
271 * PCM trigger/stop
272 */
273static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
274                struct snd_pcm_substream *subs, int cmd)
275{
276    volatile struct dbdma_cmd __iomem *cp;
277    int i, command;
278
279    switch (cmd) {
280    case SNDRV_PCM_TRIGGER_START:
281    case SNDRV_PCM_TRIGGER_RESUME:
282        if (rec->running)
283            return -EBUSY;
284        command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
285               OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
286        spin_lock(&chip->reg_lock);
287        snd_pmac_beep_stop(chip);
288        snd_pmac_pcm_set_format(chip);
289        for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
290            out_le16(&cp->command, command);
291        snd_pmac_dma_set_command(rec, &rec->cmd);
292        (void)in_le32(&rec->dma->status);
293        snd_pmac_dma_run(rec, RUN|WAKE);
294        rec->running = 1;
295        spin_unlock(&chip->reg_lock);
296        break;
297
298    case SNDRV_PCM_TRIGGER_STOP:
299    case SNDRV_PCM_TRIGGER_SUSPEND:
300        spin_lock(&chip->reg_lock);
301        rec->running = 0;
302        /*printk(KERN_DEBUG "stopped!!\n");*/
303        snd_pmac_dma_stop(rec);
304        for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
305            out_le16(&cp->command, DBDMA_STOP);
306        spin_unlock(&chip->reg_lock);
307        break;
308
309    default:
310        return -EINVAL;
311    }
312
313    return 0;
314}
315
316/*
317 * return the current pointer
318 */
319inline
320static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
321                          struct pmac_stream *rec,
322                          struct snd_pcm_substream *subs)
323{
324    int count = 0;
325
326#if 1 /* hmm.. how can we get the current dma pointer?? */
327    int stat;
328    volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
329    stat = ld_le16(&cp->xfer_status);
330    if (stat & (ACTIVE|DEAD)) {
331        count = in_le16(&cp->res_count);
332        if (count)
333            count = rec->period_size - count;
334    }
335#endif
336    count += rec->cur_period * rec->period_size;
337    /*printk(KERN_DEBUG "pointer=%d\n", count);*/
338    return bytes_to_frames(subs->runtime, count);
339}
340
341/*
342 * playback
343 */
344
345static int snd_pmac_playback_prepare(struct snd_pcm_substream *subs)
346{
347    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
348    return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
349}
350
351static int snd_pmac_playback_trigger(struct snd_pcm_substream *subs,
352                     int cmd)
353{
354    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
355    return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
356}
357
358static snd_pcm_uframes_t snd_pmac_playback_pointer(struct snd_pcm_substream *subs)
359{
360    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
361    return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
362}
363
364
365/*
366 * capture
367 */
368
369static int snd_pmac_capture_prepare(struct snd_pcm_substream *subs)
370{
371    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
372    return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
373}
374
375static int snd_pmac_capture_trigger(struct snd_pcm_substream *subs,
376                    int cmd)
377{
378    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
379    return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
380}
381
382static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs)
383{
384    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
385    return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
386}
387
388
389/*
390 * Handle DEAD DMA transfers:
391 * if the TX status comes up "DEAD" - reported on some Power Computing machines
392 * we need to re-start the dbdma - but from a different physical start address
393 * and with a different transfer length. It would get very messy to do this
394 * with the normal dbdma_cmd blocks - we would have to re-write the buffer start
395 * addresses each time. So, we will keep a single dbdma_cmd block which can be
396 * fiddled with.
397 * When DEAD status is first reported the content of the faulted dbdma block is
398 * copied into the emergency buffer and we note that the buffer is in use.
399 * we then bump the start physical address by the amount that was successfully
400 * output before it died.
401 * On any subsequent DEAD result we just do the bump-ups (we know that we are
402 * already using the emergency dbdma_cmd).
403 * CHECK: this just tries to "do it". It is possible that we should abandon
404 * xfers when the number of residual bytes gets below a certain value - I can
405 * see that this might cause a loop-forever if a too small transfer causes
406 * DEAD status. However this is a TODO for now - we'll see what gets reported.
407 * When we get a successful transfer result with the emergency buffer we just
408 * pretend that it completed using the original dmdma_cmd and carry on. The
409 * 'next_cmd' field will already point back to the original loop of blocks.
410 */
411static inline void snd_pmac_pcm_dead_xfer(struct pmac_stream *rec,
412                      volatile struct dbdma_cmd __iomem *cp)
413{
414    unsigned short req, res ;
415    unsigned int phy ;
416
417    /* printk(KERN_WARNING "snd-powermac: DMA died - patching it up!\n"); */
418
419    /* to clear DEAD status we must first clear RUN
420       set it to quiescent to be on the safe side */
421    (void)in_le32(&rec->dma->status);
422    out_le32(&rec->dma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
423
424    if (!emergency_in_use) { /* new problem */
425        memcpy((void *)emergency_dbdma.cmds, (void *)cp,
426               sizeof(struct dbdma_cmd));
427        emergency_in_use = 1;
428        st_le16(&cp->xfer_status, 0);
429        st_le16(&cp->req_count, rec->period_size);
430        cp = emergency_dbdma.cmds;
431    }
432
433    /* now bump the values to reflect the amount
434       we haven't yet shifted */
435    req = ld_le16(&cp->req_count);
436    res = ld_le16(&cp->res_count);
437    phy = ld_le32(&cp->phy_addr);
438    phy += (req - res);
439    st_le16(&cp->req_count, res);
440    st_le16(&cp->res_count, 0);
441    st_le16(&cp->xfer_status, 0);
442    st_le32(&cp->phy_addr, phy);
443
444    st_le32(&cp->cmd_dep, rec->cmd.addr
445        + sizeof(struct dbdma_cmd)*((rec->cur_period+1)%rec->nperiods));
446
447    st_le16(&cp->command, OUTPUT_MORE | BR_ALWAYS | INTR_ALWAYS);
448
449    /* point at our patched up command block */
450    out_le32(&rec->dma->cmdptr, emergency_dbdma.addr);
451
452    /* we must re-start the controller */
453    (void)in_le32(&rec->dma->status);
454    /* should complete clearing the DEAD status */
455    out_le32(&rec->dma->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
456}
457
458/*
459 * update playback/capture pointer from interrupts
460 */
461static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec)
462{
463    volatile struct dbdma_cmd __iomem *cp;
464    int c;
465    int stat;
466
467    spin_lock(&chip->reg_lock);
468    if (rec->running) {
469        for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
470
471            if (emergency_in_use) /* already using DEAD xfer? */
472                cp = emergency_dbdma.cmds;
473            else
474                cp = &rec->cmd.cmds[rec->cur_period];
475
476            stat = ld_le16(&cp->xfer_status);
477
478            if (stat & DEAD) {
479                snd_pmac_pcm_dead_xfer(rec, cp);
480                break; /* this block is still going */
481            }
482
483            if (emergency_in_use)
484                emergency_in_use = 0 ; /* done that */
485
486            if (! (stat & ACTIVE))
487                break;
488
489            /*printk(KERN_DEBUG "update frag %d\n", rec->cur_period);*/
490            st_le16(&cp->xfer_status, 0);
491            st_le16(&cp->req_count, rec->period_size);
492            /*st_le16(&cp->res_count, 0);*/
493            rec->cur_period++;
494            if (rec->cur_period >= rec->nperiods) {
495                rec->cur_period = 0;
496            }
497
498            spin_unlock(&chip->reg_lock);
499            snd_pcm_period_elapsed(rec->substream);
500            spin_lock(&chip->reg_lock);
501        }
502    }
503    spin_unlock(&chip->reg_lock);
504}
505
506
507/*
508 * hw info
509 */
510
511static struct snd_pcm_hardware snd_pmac_playback =
512{
513    .info = (SNDRV_PCM_INFO_INTERLEAVED |
514                 SNDRV_PCM_INFO_MMAP |
515                 SNDRV_PCM_INFO_MMAP_VALID |
516                 SNDRV_PCM_INFO_RESUME),
517    .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
518    .rates = SNDRV_PCM_RATE_8000_44100,
519    .rate_min = 7350,
520    .rate_max = 44100,
521    .channels_min = 2,
522    .channels_max = 2,
523    .buffer_bytes_max = 131072,
524    .period_bytes_min = 256,
525    .period_bytes_max = 16384,
526    .periods_min = 3,
527    .periods_max = PMAC_MAX_FRAGS,
528};
529
530static struct snd_pcm_hardware snd_pmac_capture =
531{
532    .info = (SNDRV_PCM_INFO_INTERLEAVED |
533                 SNDRV_PCM_INFO_MMAP |
534                 SNDRV_PCM_INFO_MMAP_VALID |
535                 SNDRV_PCM_INFO_RESUME),
536    .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
537    .rates = SNDRV_PCM_RATE_8000_44100,
538    .rate_min = 7350,
539    .rate_max = 44100,
540    .channels_min = 2,
541    .channels_max = 2,
542    .buffer_bytes_max = 131072,
543    .period_bytes_min = 256,
544    .period_bytes_max = 16384,
545    .periods_min = 3,
546    .periods_max = PMAC_MAX_FRAGS,
547};
548
549
550#if 0 // NYI
551static int snd_pmac_hw_rule_rate(struct snd_pcm_hw_params *params,
552                 struct snd_pcm_hw_rule *rule)
553{
554    struct snd_pmac *chip = rule->private;
555    struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
556    int i, freq_table[8], num_freqs;
557
558    if (! rec)
559        return -EINVAL;
560    num_freqs = 0;
561    for (i = chip->num_freqs - 1; i >= 0; i--) {
562        if (rec->cur_freqs & (1 << i))
563            freq_table[num_freqs++] = chip->freq_table[i];
564    }
565
566    return snd_interval_list(hw_param_interval(params, rule->var),
567                 num_freqs, freq_table, 0);
568}
569
570static int snd_pmac_hw_rule_format(struct snd_pcm_hw_params *params,
571                   struct snd_pcm_hw_rule *rule)
572{
573    struct snd_pmac *chip = rule->private;
574    struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
575
576    if (! rec)
577        return -EINVAL;
578    return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
579                   rec->cur_formats);
580}
581#endif // NYI
582
583static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
584                 struct snd_pcm_substream *subs)
585{
586    struct snd_pcm_runtime *runtime = subs->runtime;
587    int i;
588
589    /* look up frequency table and fill bit mask */
590    runtime->hw.rates = 0;
591    for (i = 0; i < chip->num_freqs; i++)
592        if (chip->freqs_ok & (1 << i))
593            runtime->hw.rates |=
594                snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
595
596    /* check for minimum and maximum rates */
597    for (i = 0; i < chip->num_freqs; i++) {
598        if (chip->freqs_ok & (1 << i)) {
599            runtime->hw.rate_max = chip->freq_table[i];
600            break;
601        }
602    }
603    for (i = chip->num_freqs - 1; i >= 0; i--) {
604        if (chip->freqs_ok & (1 << i)) {
605            runtime->hw.rate_min = chip->freq_table[i];
606            break;
607        }
608    }
609    runtime->hw.formats = chip->formats_ok;
610    if (chip->can_capture) {
611        if (! chip->can_duplex)
612            runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
613        runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
614    }
615    runtime->private_data = rec;
616    rec->substream = subs;
617
618#if 0 /* FIXME: still under development.. */
619    snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
620                snd_pmac_hw_rule_rate, chip, rec->stream, -1);
621    snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
622                snd_pmac_hw_rule_format, chip, rec->stream, -1);
623#endif
624
625    runtime->hw.periods_max = rec->cmd.size - 1;
626
627    /* constraints to fix choppy sound */
628    snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
629    return 0;
630}
631
632static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
633                  struct snd_pcm_substream *subs)
634{
635    struct pmac_stream *astr;
636
637    snd_pmac_dma_stop(rec);
638
639    astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
640    if (! astr)
641        return -EINVAL;
642
643    /* reset constraints */
644    astr->cur_freqs = chip->freqs_ok;
645    astr->cur_formats = chip->formats_ok;
646
647    return 0;
648}
649
650static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
651{
652    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
653
654    subs->runtime->hw = snd_pmac_playback;
655    return snd_pmac_pcm_open(chip, &chip->playback, subs);
656}
657
658static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
659{
660    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
661
662    subs->runtime->hw = snd_pmac_capture;
663    return snd_pmac_pcm_open(chip, &chip->capture, subs);
664}
665
666static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
667{
668    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
669
670    return snd_pmac_pcm_close(chip, &chip->playback, subs);
671}
672
673static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
674{
675    struct snd_pmac *chip = snd_pcm_substream_chip(subs);
676
677    return snd_pmac_pcm_close(chip, &chip->capture, subs);
678}
679
680/*
681 */
682
683static struct snd_pcm_ops snd_pmac_playback_ops = {
684    .open = snd_pmac_playback_open,
685    .close = snd_pmac_playback_close,
686    .ioctl = snd_pcm_lib_ioctl,
687    .hw_params = snd_pmac_pcm_hw_params,
688    .hw_free = snd_pmac_pcm_hw_free,
689    .prepare = snd_pmac_playback_prepare,
690    .trigger = snd_pmac_playback_trigger,
691    .pointer = snd_pmac_playback_pointer,
692};
693
694static struct snd_pcm_ops snd_pmac_capture_ops = {
695    .open = snd_pmac_capture_open,
696    .close = snd_pmac_capture_close,
697    .ioctl = snd_pcm_lib_ioctl,
698    .hw_params = snd_pmac_pcm_hw_params,
699    .hw_free = snd_pmac_pcm_hw_free,
700    .prepare = snd_pmac_capture_prepare,
701    .trigger = snd_pmac_capture_trigger,
702    .pointer = snd_pmac_capture_pointer,
703};
704
705int __devinit snd_pmac_pcm_new(struct snd_pmac *chip)
706{
707    struct snd_pcm *pcm;
708    int err;
709    int num_captures = 1;
710
711    if (! chip->can_capture)
712        num_captures = 0;
713    err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
714    if (err < 0)
715        return err;
716
717    snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
718    if (chip->can_capture)
719        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
720
721    pcm->private_data = chip;
722    pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
723    strcpy(pcm->name, chip->card->shortname);
724    chip->pcm = pcm;
725
726    chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
727    if (chip->can_byte_swap)
728        chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
729
730    chip->playback.cur_formats = chip->formats_ok;
731    chip->capture.cur_formats = chip->formats_ok;
732    chip->playback.cur_freqs = chip->freqs_ok;
733    chip->capture.cur_freqs = chip->freqs_ok;
734
735    /* preallocate 64k buffer */
736    snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
737                          &chip->pdev->dev,
738                          64 * 1024, 64 * 1024);
739
740    return 0;
741}
742
743
744static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
745{
746    out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
747    snd_pmac_wait_ack(&chip->playback);
748    out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
749    snd_pmac_wait_ack(&chip->capture);
750}
751
752
753/*
754 * handling beep
755 */
756void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
757{
758    struct pmac_stream *rec = &chip->playback;
759
760    snd_pmac_dma_stop(rec);
761    st_le16(&chip->extra_dma.cmds->req_count, bytes);
762    st_le16(&chip->extra_dma.cmds->xfer_status, 0);
763    st_le32(&chip->extra_dma.cmds->cmd_dep, chip->extra_dma.addr);
764    st_le32(&chip->extra_dma.cmds->phy_addr, addr);
765    st_le16(&chip->extra_dma.cmds->command, OUTPUT_MORE + BR_ALWAYS);
766    out_le32(&chip->awacs->control,
767         (in_le32(&chip->awacs->control) & ~0x1f00)
768         | (speed << 8));
769    out_le32(&chip->awacs->byteswap, 0);
770    snd_pmac_dma_set_command(rec, &chip->extra_dma);
771    snd_pmac_dma_run(rec, RUN);
772}
773
774void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
775{
776    snd_pmac_dma_stop(&chip->playback);
777    st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
778    snd_pmac_pcm_set_format(chip); /* reset format */
779}
780
781
782/*
783 * interrupt handlers
784 */
785static irqreturn_t
786snd_pmac_tx_intr(int irq, void *devid)
787{
788    struct snd_pmac *chip = devid;
789    snd_pmac_pcm_update(chip, &chip->playback);
790    return IRQ_HANDLED;
791}
792
793
794static irqreturn_t
795snd_pmac_rx_intr(int irq, void *devid)
796{
797    struct snd_pmac *chip = devid;
798    snd_pmac_pcm_update(chip, &chip->capture);
799    return IRQ_HANDLED;
800}
801
802
803static irqreturn_t
804snd_pmac_ctrl_intr(int irq, void *devid)
805{
806    struct snd_pmac *chip = devid;
807    int ctrl = in_le32(&chip->awacs->control);
808
809    /*printk(KERN_DEBUG "pmac: control interrupt.. 0x%x\n", ctrl);*/
810    if (ctrl & MASK_PORTCHG) {
811        /* do something when headphone is plugged/unplugged? */
812        if (chip->update_automute)
813            chip->update_automute(chip, 1);
814    }
815    if (ctrl & MASK_CNTLERR) {
816        int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
817        if (err && chip->model <= PMAC_SCREAMER)
818            snd_printk(KERN_DEBUG "error %x\n", err);
819    }
820    /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
821    out_le32(&chip->awacs->control, ctrl);
822    return IRQ_HANDLED;
823}
824
825
826/*
827 * a wrapper to feature call for compatibility
828 */
829static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
830{
831    if (ppc_md.feature_call)
832        ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
833}
834
835/*
836 * release resources
837 */
838
839static int snd_pmac_free(struct snd_pmac *chip)
840{
841    /* stop sounds */
842    if (chip->initialized) {
843        snd_pmac_dbdma_reset(chip);
844        /* disable interrupts from awacs interface */
845        out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
846    }
847
848    if (chip->node)
849        snd_pmac_sound_feature(chip, 0);
850
851    /* clean up mixer if any */
852    if (chip->mixer_free)
853        chip->mixer_free(chip);
854
855    snd_pmac_detach_beep(chip);
856
857    /* release resources */
858    if (chip->irq >= 0)
859        free_irq(chip->irq, (void*)chip);
860    if (chip->tx_irq >= 0)
861        free_irq(chip->tx_irq, (void*)chip);
862    if (chip->rx_irq >= 0)
863        free_irq(chip->rx_irq, (void*)chip);
864    snd_pmac_dbdma_free(chip, &chip->playback.cmd);
865    snd_pmac_dbdma_free(chip, &chip->capture.cmd);
866    snd_pmac_dbdma_free(chip, &chip->extra_dma);
867    snd_pmac_dbdma_free(chip, &emergency_dbdma);
868    if (chip->macio_base)
869        iounmap(chip->macio_base);
870    if (chip->latch_base)
871        iounmap(chip->latch_base);
872    if (chip->awacs)
873        iounmap(chip->awacs);
874    if (chip->playback.dma)
875        iounmap(chip->playback.dma);
876    if (chip->capture.dma)
877        iounmap(chip->capture.dma);
878
879    if (chip->node) {
880        int i;
881        for (i = 0; i < 3; i++) {
882            if (chip->requested & (1 << i))
883                release_mem_region(chip->rsrc[i].start,
884                           resource_size(&chip->rsrc[i]));
885        }
886    }
887
888    if (chip->pdev)
889        pci_dev_put(chip->pdev);
890    of_node_put(chip->node);
891    kfree(chip);
892    return 0;
893}
894
895
896/*
897 * free the device
898 */
899static int snd_pmac_dev_free(struct snd_device *device)
900{
901    struct snd_pmac *chip = device->device_data;
902    return snd_pmac_free(chip);
903}
904
905
906/*
907 * check the machine support byteswap (little-endian)
908 */
909
910static void __devinit detect_byte_swap(struct snd_pmac *chip)
911{
912    struct device_node *mio;
913
914    /* if seems that Keylargo can't byte-swap */
915    for (mio = chip->node->parent; mio; mio = mio->parent) {
916        if (strcmp(mio->name, "mac-io") == 0) {
917            if (of_device_is_compatible(mio, "Keylargo"))
918                chip->can_byte_swap = 0;
919            break;
920        }
921    }
922
923    /* it seems the Pismo & iBook can't byte-swap in hardware. */
924    if (of_machine_is_compatible("PowerBook3,1") ||
925        of_machine_is_compatible("PowerBook2,1"))
926        chip->can_byte_swap = 0 ;
927
928    if (of_machine_is_compatible("PowerBook2,1"))
929        chip->can_duplex = 0;
930}
931
932
933/*
934 * detect a sound chip
935 */
936static int __devinit snd_pmac_detect(struct snd_pmac *chip)
937{
938    struct device_node *sound;
939    struct device_node *dn;
940    const unsigned int *prop;
941    unsigned int l;
942    struct macio_chip* macio;
943
944    if (!machine_is(powermac))
945        return -ENODEV;
946
947    chip->subframe = 0;
948    chip->revision = 0;
949    chip->freqs_ok = 0xff; /* all ok */
950    chip->model = PMAC_AWACS;
951    chip->can_byte_swap = 1;
952    chip->can_duplex = 1;
953    chip->can_capture = 1;
954    chip->num_freqs = ARRAY_SIZE(awacs_freqs);
955    chip->freq_table = awacs_freqs;
956    chip->pdev = NULL;
957
958    chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
959
960    /* check machine type */
961    if (of_machine_is_compatible("AAPL,3400/2400")
962        || of_machine_is_compatible("AAPL,3500"))
963        chip->is_pbook_3400 = 1;
964    else if (of_machine_is_compatible("PowerBook1,1")
965         || of_machine_is_compatible("AAPL,PowerBook1998"))
966        chip->is_pbook_G3 = 1;
967    chip->node = of_find_node_by_name(NULL, "awacs");
968    sound = of_node_get(chip->node);
969
970    /*
971     * powermac G3 models have a node called "davbus"
972     * with a child called "sound".
973     */
974    if (!chip->node)
975        chip->node = of_find_node_by_name(NULL, "davbus");
976    /*
977     * if we didn't find a davbus device, try 'i2s-a' since
978     * this seems to be what iBooks have
979     */
980    if (! chip->node) {
981        chip->node = of_find_node_by_name(NULL, "i2s-a");
982        if (chip->node && chip->node->parent &&
983            chip->node->parent->parent) {
984            if (of_device_is_compatible(chip->node->parent->parent,
985                         "K2-Keylargo"))
986                chip->is_k2 = 1;
987        }
988    }
989    if (! chip->node)
990        return -ENODEV;
991
992    if (!sound) {
993        sound = of_find_node_by_name(NULL, "sound");
994        while (sound && sound->parent != chip->node)
995            sound = of_find_node_by_name(sound, "sound");
996    }
997    if (! sound) {
998        of_node_put(chip->node);
999        chip->node = NULL;
1000        return -ENODEV;
1001    }
1002    prop = of_get_property(sound, "sub-frame", NULL);
1003    if (prop && *prop < 16)
1004        chip->subframe = *prop;
1005    prop = of_get_property(sound, "layout-id", NULL);
1006    if (prop) {
1007        /* partly deprecate snd-powermac, for those machines
1008         * that have a layout-id property for now */
1009        printk(KERN_INFO "snd-powermac no longer handles any "
1010                 "machines with a layout-id property "
1011                 "in the device-tree, use snd-aoa.\n");
1012        of_node_put(sound);
1013        of_node_put(chip->node);
1014        chip->node = NULL;
1015        return -ENODEV;
1016    }
1017    /* This should be verified on older screamers */
1018    if (of_device_is_compatible(sound, "screamer")) {
1019        chip->model = PMAC_SCREAMER;
1020        // chip->can_byte_swap = 0; /* FIXME: check this */
1021    }
1022    if (of_device_is_compatible(sound, "burgundy")) {
1023        chip->model = PMAC_BURGUNDY;
1024        chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1025    }
1026    if (of_device_is_compatible(sound, "daca")) {
1027        chip->model = PMAC_DACA;
1028        chip->can_capture = 0; /* no capture */
1029        chip->can_duplex = 0;
1030        // chip->can_byte_swap = 0; /* FIXME: check this */
1031        chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1032    }
1033    if (of_device_is_compatible(sound, "tumbler")) {
1034        chip->model = PMAC_TUMBLER;
1035        chip->can_capture = of_machine_is_compatible("PowerMac4,2")
1036                || of_machine_is_compatible("PowerBook3,2")
1037                || of_machine_is_compatible("PowerBook3,3")
1038                || of_machine_is_compatible("PowerBook4,1")
1039                || of_machine_is_compatible("PowerBook4,2")
1040                || of_machine_is_compatible("PowerBook4,3");
1041        chip->can_duplex = 0;
1042        // chip->can_byte_swap = 0; /* FIXME: check this */
1043        chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1044        chip->freq_table = tumbler_freqs;
1045        chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1046    }
1047    if (of_device_is_compatible(sound, "snapper")) {
1048        chip->model = PMAC_SNAPPER;
1049        // chip->can_byte_swap = 0; /* FIXME: check this */
1050        chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1051        chip->freq_table = tumbler_freqs;
1052        chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1053    }
1054    prop = of_get_property(sound, "device-id", NULL);
1055    if (prop)
1056        chip->device_id = *prop;
1057    dn = of_find_node_by_name(NULL, "perch");
1058    chip->has_iic = (dn != NULL);
1059    of_node_put(dn);
1060
1061    /* We need the PCI device for DMA allocations, let's use a crude method
1062     * for now ...
1063     */
1064    macio = macio_find(chip->node, macio_unknown);
1065    if (macio == NULL)
1066        printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
1067    else {
1068        struct pci_dev *pdev = NULL;
1069
1070        for_each_pci_dev(pdev) {
1071            struct device_node *np = pci_device_to_OF_node(pdev);
1072            if (np && np == macio->of_node) {
1073                chip->pdev = pdev;
1074                break;
1075            }
1076        }
1077    }
1078    if (chip->pdev == NULL)
1079        printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
1080               " device !\n");
1081
1082    detect_byte_swap(chip);
1083
1084    /* look for a property saying what sample rates
1085       are available */
1086    prop = of_get_property(sound, "sample-rates", &l);
1087    if (! prop)
1088        prop = of_get_property(sound, "output-frame-rates", &l);
1089    if (prop) {
1090        int i;
1091        chip->freqs_ok = 0;
1092        for (l /= sizeof(int); l > 0; --l) {
1093            unsigned int r = *prop++;
1094            /* Apple 'Fixed' format */
1095            if (r >= 0x10000)
1096                r >>= 16;
1097            for (i = 0; i < chip->num_freqs; ++i) {
1098                if (r == chip->freq_table[i]) {
1099                    chip->freqs_ok |= (1 << i);
1100                    break;
1101                }
1102            }
1103        }
1104    } else {
1105        /* assume only 44.1khz */
1106        chip->freqs_ok = 1;
1107    }
1108
1109    of_node_put(sound);
1110    return 0;
1111}
1112
1113#ifdef PMAC_SUPPORT_AUTOMUTE
1114/*
1115 * auto-mute
1116 */
1117static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
1118                  struct snd_ctl_elem_value *ucontrol)
1119{
1120    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1121    ucontrol->value.integer.value[0] = chip->auto_mute;
1122    return 0;
1123}
1124
1125static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
1126                  struct snd_ctl_elem_value *ucontrol)
1127{
1128    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1129    if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1130        chip->auto_mute = !!ucontrol->value.integer.value[0];
1131        if (chip->update_automute)
1132            chip->update_automute(chip, 1);
1133        return 1;
1134    }
1135    return 0;
1136}
1137
1138static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
1139                  struct snd_ctl_elem_value *ucontrol)
1140{
1141    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1142    if (chip->detect_headphone)
1143        ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1144    else
1145        ucontrol->value.integer.value[0] = 0;
1146    return 0;
1147}
1148
1149static struct snd_kcontrol_new auto_mute_controls[] __devinitdata = {
1150    { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1151      .name = "Auto Mute Switch",
1152      .info = snd_pmac_boolean_mono_info,
1153      .get = pmac_auto_mute_get,
1154      .put = pmac_auto_mute_put,
1155    },
1156    { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1157      .name = "Headphone Detection",
1158      .access = SNDRV_CTL_ELEM_ACCESS_READ,
1159      .info = snd_pmac_boolean_mono_info,
1160      .get = pmac_hp_detect_get,
1161    },
1162};
1163
1164int __devinit snd_pmac_add_automute(struct snd_pmac *chip)
1165{
1166    int err;
1167    chip->auto_mute = 1;
1168    err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1169    if (err < 0) {
1170        printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1171        return err;
1172    }
1173    chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1174    return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1175}
1176#endif /* PMAC_SUPPORT_AUTOMUTE */
1177
1178/*
1179 * create and detect a pmac chip record
1180 */
1181int __devinit snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
1182{
1183    struct snd_pmac *chip;
1184    struct device_node *np;
1185    int i, err;
1186    unsigned int irq;
1187    unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1188    static struct snd_device_ops ops = {
1189        .dev_free = snd_pmac_dev_free,
1190    };
1191
1192    *chip_return = NULL;
1193
1194    chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1195    if (chip == NULL)
1196        return -ENOMEM;
1197    chip->card = card;
1198
1199    spin_lock_init(&chip->reg_lock);
1200    chip->irq = chip->tx_irq = chip->rx_irq = -1;
1201
1202    chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1203    chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1204
1205    if ((err = snd_pmac_detect(chip)) < 0)
1206        goto __error;
1207
1208    if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1209        snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1210        snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0 ||
1211        snd_pmac_dbdma_alloc(chip, &emergency_dbdma, 2) < 0) {
1212        err = -ENOMEM;
1213        goto __error;
1214    }
1215
1216    np = chip->node;
1217    chip->requested = 0;
1218    if (chip->is_k2) {
1219        static char *rnames[] = {
1220            "Sound Control", "Sound DMA" };
1221        for (i = 0; i < 2; i ++) {
1222            if (of_address_to_resource(np->parent, i,
1223                           &chip->rsrc[i])) {
1224                printk(KERN_ERR "snd: can't translate rsrc "
1225                       " %d (%s)\n", i, rnames[i]);
1226                err = -ENODEV;
1227                goto __error;
1228            }
1229            if (request_mem_region(chip->rsrc[i].start,
1230                           resource_size(&chip->rsrc[i]),
1231                           rnames[i]) == NULL) {
1232                printk(KERN_ERR "snd: can't request rsrc "
1233                       " %d (%s: %pR)\n",
1234                       i, rnames[i], &chip->rsrc[i]);
1235                err = -ENODEV;
1236                goto __error;
1237            }
1238            chip->requested |= (1 << i);
1239        }
1240        ctrl_addr = chip->rsrc[0].start;
1241        txdma_addr = chip->rsrc[1].start;
1242        rxdma_addr = txdma_addr + 0x100;
1243    } else {
1244        static char *rnames[] = {
1245            "Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
1246        for (i = 0; i < 3; i ++) {
1247            if (of_address_to_resource(np, i,
1248                           &chip->rsrc[i])) {
1249                printk(KERN_ERR "snd: can't translate rsrc "
1250                       " %d (%s)\n", i, rnames[i]);
1251                err = -ENODEV;
1252                goto __error;
1253            }
1254            if (request_mem_region(chip->rsrc[i].start,
1255                           resource_size(&chip->rsrc[i]),
1256                           rnames[i]) == NULL) {
1257                printk(KERN_ERR "snd: can't request rsrc "
1258                       " %d (%s: %pR)\n",
1259                       i, rnames[i], &chip->rsrc[i]);
1260                err = -ENODEV;
1261                goto __error;
1262            }
1263            chip->requested |= (1 << i);
1264        }
1265        ctrl_addr = chip->rsrc[0].start;
1266        txdma_addr = chip->rsrc[1].start;
1267        rxdma_addr = chip->rsrc[2].start;
1268    }
1269
1270    chip->awacs = ioremap(ctrl_addr, 0x1000);
1271    chip->playback.dma = ioremap(txdma_addr, 0x100);
1272    chip->capture.dma = ioremap(rxdma_addr, 0x100);
1273    if (chip->model <= PMAC_BURGUNDY) {
1274        irq = irq_of_parse_and_map(np, 0);
1275        if (request_irq(irq, snd_pmac_ctrl_intr, 0,
1276                "PMac", (void*)chip)) {
1277            snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
1278                   irq);
1279            err = -EBUSY;
1280            goto __error;
1281        }
1282        chip->irq = irq;
1283    }
1284    irq = irq_of_parse_and_map(np, 1);
1285    if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
1286        snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1287        err = -EBUSY;
1288        goto __error;
1289    }
1290    chip->tx_irq = irq;
1291    irq = irq_of_parse_and_map(np, 2);
1292    if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
1293        snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1294        err = -EBUSY;
1295        goto __error;
1296    }
1297    chip->rx_irq = irq;
1298
1299    snd_pmac_sound_feature(chip, 1);
1300
1301    /* reset & enable interrupts */
1302    if (chip->model <= PMAC_BURGUNDY)
1303        out_le32(&chip->awacs->control, chip->control_mask);
1304
1305    /* Powerbooks have odd ways of enabling inputs such as
1306       an expansion-bay CD or sound from an internal modem
1307       or a PC-card modem. */
1308    if (chip->is_pbook_3400) {
1309        /* Enable CD and PC-card sound inputs. */
1310        /* This is done by reading from address
1311         * f301a000, + 0x10 to enable the expansion-bay
1312         * CD sound input, + 0x80 to enable the PC-card
1313         * sound input. The 0x100 enables the SCSI bus
1314         * terminator power.
1315         */
1316        chip->latch_base = ioremap (0xf301a000, 0x1000);
1317        in_8(chip->latch_base + 0x190);
1318    } else if (chip->is_pbook_G3) {
1319        struct device_node* mio;
1320        for (mio = chip->node->parent; mio; mio = mio->parent) {
1321            if (strcmp(mio->name, "mac-io") == 0) {
1322                struct resource r;
1323                if (of_address_to_resource(mio, 0, &r) == 0)
1324                    chip->macio_base =
1325                        ioremap(r.start, 0x40);
1326                break;
1327            }
1328        }
1329        /* Enable CD sound input. */
1330        /* The relevant bits for writing to this byte are 0x8f.
1331         * I haven't found out what the 0x80 bit does.
1332         * For the 0xf bits, writing 3 or 7 enables the CD
1333         * input, any other value disables it. Values
1334         * 1, 3, 5, 7 enable the microphone. Values 0, 2,
1335         * 4, 6, 8 - f enable the input from the modem.
1336         */
1337        if (chip->macio_base)
1338            out_8(chip->macio_base + 0x37, 3);
1339    }
1340
1341    /* Reset dbdma channels */
1342    snd_pmac_dbdma_reset(chip);
1343
1344    if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1345        goto __error;
1346
1347    *chip_return = chip;
1348    return 0;
1349
1350 __error:
1351    snd_pmac_free(chip);
1352    return err;
1353}
1354
1355
1356/*
1357 * sleep notify for powerbook
1358 */
1359
1360#ifdef CONFIG_PM
1361
1362/*
1363 * Save state when going to sleep, restore it afterwards.
1364 */
1365
1366void snd_pmac_suspend(struct snd_pmac *chip)
1367{
1368    unsigned long flags;
1369
1370    snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1371    if (chip->suspend)
1372        chip->suspend(chip);
1373    snd_pcm_suspend_all(chip->pcm);
1374    spin_lock_irqsave(&chip->reg_lock, flags);
1375    snd_pmac_beep_stop(chip);
1376    spin_unlock_irqrestore(&chip->reg_lock, flags);
1377    if (chip->irq >= 0)
1378        disable_irq(chip->irq);
1379    if (chip->tx_irq >= 0)
1380        disable_irq(chip->tx_irq);
1381    if (chip->rx_irq >= 0)
1382        disable_irq(chip->rx_irq);
1383    snd_pmac_sound_feature(chip, 0);
1384}
1385
1386void snd_pmac_resume(struct snd_pmac *chip)
1387{
1388    snd_pmac_sound_feature(chip, 1);
1389    if (chip->resume)
1390        chip->resume(chip);
1391    /* enable CD sound input */
1392    if (chip->macio_base && chip->is_pbook_G3)
1393        out_8(chip->macio_base + 0x37, 3);
1394    else if (chip->is_pbook_3400)
1395        in_8(chip->latch_base + 0x190);
1396
1397    snd_pmac_pcm_set_format(chip);
1398
1399    if (chip->irq >= 0)
1400        enable_irq(chip->irq);
1401    if (chip->tx_irq >= 0)
1402        enable_irq(chip->tx_irq);
1403    if (chip->rx_irq >= 0)
1404        enable_irq(chip->rx_irq);
1405
1406    snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1407}
1408
1409#endif /* CONFIG_PM */
1410
1411

Archive Download this file



interactive