2 * Low-level ALSA driver for the ENSONIQ SoundScape PnP
3 * Copyright (c) by Chris Rankin
5 * This driver was written in part using information obtained from
6 * the OSS/Free SoundScape driver, written by Hannu Savolainen.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <sound/driver.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/pnp.h>
28 #include <linux/spinlock.h>
29 #include <linux/moduleparam.h>
31 #include <sound/core.h>
32 #include <sound/hwdep.h>
33 #include <sound/cs4231.h>
34 #include <sound/mpu401.h>
35 #include <sound/initval.h>
37 #include <sound/sscape_ioctl.h>
40 MODULE_AUTHOR("Chris Rankin");
41 MODULE_DESCRIPTION("ENSONIQ SoundScape PnP driver");
42 MODULE_LICENSE("GPL");
44 static int index[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IDX;
45 static char* id[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_STR;
46 static long port[SNDRV_CARDS] __devinitdata = { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_PORT };
47 static int irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ;
48 static int mpu_irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ;
49 static int dma[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_DMA;
52 module_param_array(index, int, boot_devs, 0444);
53 MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
55 module_param_array(id, charp, boot_devs, 0444);
56 MODULE_PARM_DESC(id, "Description for SoundScape card");
58 module_param_array(port, long, boot_devs, 0444);
59 MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
61 module_param_array(irq, int, boot_devs, 0444);
62 MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
64 module_param_array(mpu_irq, int, boot_devs, 0444);
65 MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
67 module_param_array(dma, int, boot_devs, 0444);
68 MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
71 static struct pnp_card_device_id sscape_pnpids[] = {
72 { .id = "ENS3081", .devs = { { "ENS0000" } } },
73 { .id = "" } /* end */
76 MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
79 static snd_card_t *sscape_card[SNDRV_CARDS];
82 #define MPU401_IO(i) ((i) + 0)
83 #define MIDI_DATA_IO(i) ((i) + 0)
84 #define MIDI_CTRL_IO(i) ((i) + 1)
85 #define HOST_CTRL_IO(i) ((i) + 2)
86 #define HOST_DATA_IO(i) ((i) + 3)
87 #define ODIE_ADDR_IO(i) ((i) + 4)
88 #define ODIE_DATA_IO(i) ((i) + 5)
89 #define CODEC_IO(i) ((i) + 8)
98 #define CMD_SET_MIDI_VOL 0x84
99 #define CMD_GET_MIDI_VOL 0x85
100 #define CMD_XXX_MIDI_VOL 0x86
101 #define CMD_SET_EXTMIDI 0x8a
102 #define CMD_GET_EXTMIDI 0x8b
103 #define CMD_SET_MT32 0x8c
104 #define CMD_GET_MT32 0x8d
119 #define DMA_8BIT 0x80
122 #define AD1845_FREQ_SEL_MSB 0x16
123 #define AD1845_FREQ_SEL_LSB 0x17
130 struct resource *io_res;
136 * The MIDI device won't work until we've loaded
137 * its firmware via a hardware-dependent device IOCTL
141 unsigned long midi_usage;
142 unsigned char midi_vol;
145 #define INVALID_IRQ ((unsigned)-1)
148 static inline struct soundscape *get_card_soundscape(snd_card_t * c)
150 return (struct soundscape *) (c->private_data);
153 static inline struct soundscape *get_mpu401_soundscape(mpu401_t * mpu)
155 return (struct soundscape *) (mpu->private_data);
158 static inline struct soundscape *get_hwdep_soundscape(snd_hwdep_t * hw)
160 return (struct soundscape *) (hw->private_data);
165 * Allocates some kernel memory that we can use for DMA.
166 * I think this means that the memory has to map to
167 * contiguous pages of physical memory.
169 static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf, unsigned long size)
172 if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
174 snd_printk(KERN_ERR "sscape: Failed to allocate %lu bytes for DMA\n", size);
183 * Release the DMA-able kernel memory ...
185 static void free_dmabuf(struct snd_dma_buffer *buf)
187 if (buf && buf->area)
188 snd_dma_free_pages(buf);
193 * This function writes to the SoundScape's control registers,
194 * but doesn't do any locking. It's up to the caller to do that.
195 * This is why this function is "unsafe" ...
197 static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg, unsigned char val)
199 outb(reg, ODIE_ADDR_IO(io_base));
200 outb(val, ODIE_DATA_IO(io_base));
204 * Write to the SoundScape's control registers, and do the
205 * necessary locking ...
207 static void sscape_write(struct soundscape *s, enum GA_REG reg, unsigned char val)
211 spin_lock_irqsave(&s->lock, flags);
212 sscape_write_unsafe(s->io_base, reg, val);
213 spin_unlock_irqrestore(&s->lock, flags);
217 * Read from the SoundScape's control registers, but leave any
218 * locking to the caller. This is why the function is "unsafe" ...
220 static inline unsigned char sscape_read_unsafe(unsigned io_base, enum GA_REG reg)
222 outb(reg, ODIE_ADDR_IO(io_base));
223 return inb(ODIE_DATA_IO(io_base));
227 * Puts the SoundScape into "host" mode, as compared to "MIDI" mode
229 static inline void set_host_mode_unsafe(unsigned io_base)
231 outb(0x0, HOST_CTRL_IO(io_base));
235 * Puts the SoundScape into "MIDI" mode, as compared to "host" mode
237 static inline void set_midi_mode_unsafe(unsigned io_base)
239 outb(0x3, HOST_CTRL_IO(io_base));
243 * Read the SoundScape's host-mode control register, but leave
244 * any locking issues to the caller ...
246 static inline int host_read_unsafe(unsigned io_base)
249 if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0) {
250 data = inb(HOST_DATA_IO(io_base));
257 * Read the SoundScape's host-mode control register, performing
258 * a limited amount of busy-waiting if the register isn't ready.
259 * Also leaves all locking-issues to the caller ...
261 static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
265 while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
274 * Write to the SoundScape's host-mode control registers, but
275 * leave any locking issues to the caller ...
277 static inline int host_write_unsafe(unsigned io_base, unsigned char data)
279 if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
280 outb(data, HOST_DATA_IO(io_base));
288 * Write to the SoundScape's host-mode control registers, performing
289 * a limited amount of busy-waiting if the register isn't ready.
290 * Also leaves all locking-issues to the caller ...
292 static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
297 while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
307 * Check that the MIDI subsystem is operational. If it isn't,
308 * then we will hang the computer if we try to use it ...
310 * NOTE: This check is based upon observation, not documentation.
312 static inline int verify_mpu401(const mpu401_t * mpu)
314 return ((inb(MIDI_CTRL_IO(mpu->port)) & 0xc0) == 0x80);
318 * This is apparently the standard way to initailise an MPU-401
320 static inline void initialise_mpu401(const mpu401_t * mpu)
322 outb(0, MIDI_DATA_IO(mpu->port));
326 * Tell the SoundScape to activate the AD1845 chip (I think).
327 * The AD1845 detection fails if we *don't* do this, so I
328 * think that this is a good idea ...
330 static inline void activate_ad1845_unsafe(unsigned io_base)
332 sscape_write_unsafe(io_base, GA_HMCTL_REG, (sscape_read_unsafe(io_base, GA_HMCTL_REG) & 0xcf) | 0x10);
333 sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
337 * Do the necessary ALSA-level cleanup to deallocate our driver ...
339 static void soundscape_free(snd_card_t * c)
341 register struct soundscape *sscape = get_card_soundscape(c);
342 release_resource(sscape->io_res);
343 kfree_nocheck(sscape->io_res);
344 free_dma(sscape->chip->dma1);
348 * Put this process into an idle wait-state for a certain number
349 * of "jiffies". The process can almost certainly be rescheduled
350 * while we're waiting, and so we must NOT be holding any spinlocks
351 * when we call this function. If we are then we risk DEADLOCK in
352 * SMP (Ha!) or pre-emptible kernels.
354 static inline void sleep(long jiffs, int state)
356 set_current_state(state);
357 schedule_timeout(jiffs);
361 * Tell the SoundScape to begin a DMA tranfer using the given channel.
362 * All locking issues are left to the caller.
364 static inline void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
366 sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) | 0x01);
367 sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) & 0xfe);
371 * Wait for a DMA transfer to complete. This is a "limited busy-wait",
372 * and all locking issues are left to the caller.
374 static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg, unsigned timeout)
376 while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
381 return (sscape_read_unsafe(io_base, reg) & 0x01);
385 * Wait for the On-Board Processor to return its start-up
386 * acknowledgement sequence. This wait is too long for
387 * us to perform "busy-waiting", and so we must sleep.
388 * This in turn means that we must not be holding any
389 * spinlocks when we call this function.
391 static int obp_startup_ack(struct soundscape *s, unsigned timeout)
393 while (timeout != 0) {
397 sleep(1, TASK_INTERRUPTIBLE);
399 spin_lock_irqsave(&s->lock, flags);
400 x = inb(HOST_DATA_IO(s->io_base));
401 spin_unlock_irqrestore(&s->lock, flags);
402 if ((x & 0xfe) == 0xfe)
412 * Wait for the host to return its start-up acknowledgement
413 * sequence. This wait is too long for us to perform
414 * "busy-waiting", and so we must sleep. This in turn means
415 * that we must not be holding any spinlocks when we call
418 static int host_startup_ack(struct soundscape *s, unsigned timeout)
420 while (timeout != 0) {
424 sleep(1, TASK_INTERRUPTIBLE);
426 spin_lock_irqsave(&s->lock, flags);
427 x = inb(HOST_DATA_IO(s->io_base));
428 spin_unlock_irqrestore(&s->lock, flags);
439 * Upload a byte-stream into the SoundScape using DMA channel A.
441 static int upload_dma_data(struct soundscape *s,
442 const unsigned char __user *data,
446 struct snd_dma_buffer dma;
449 if (!get_dmabuf(&dma, PAGE_ALIGN(size)))
452 spin_lock_irqsave(&s->lock, flags);
455 * Reset the board ...
457 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f);
460 * Enable the DMA channels and configure them ...
462 sscape_write_unsafe(s->io_base, GA_DMACFG_REG, 0x50);
463 sscape_write_unsafe(s->io_base, GA_DMAA_REG, (s->chip->dma1 << 4) | DMA_8BIT);
464 sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
467 * Take the board out of reset ...
469 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x80);
472 * Upload the user's data (firmware?) to the SoundScape
473 * board through the DMA channel ...
479 * Apparently, copying to/from userspace can sleep.
480 * We are therefore forbidden from holding any
481 * spinlocks while we copy ...
483 spin_unlock_irqrestore(&s->lock, flags);
486 * Remember that the data that we want to DMA
487 * comes from USERSPACE. We have already verified
488 * the userspace pointer ...
490 len = min(size, dma.bytes);
491 __copy_from_user(dma.area, data, len);
496 * Grab that spinlock again, now that we've
499 spin_lock_irqsave(&s->lock, flags);
501 snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
502 sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
503 if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
505 * Don't forget to release this spinlock we're holding ...
507 spin_unlock_irqrestore(&s->lock, flags);
509 snd_printk(KERN_ERR "sscape: DMA upload has timed out\n");
515 set_host_mode_unsafe(s->io_base);
518 * Boot the board ... (I think)
520 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x40);
521 spin_unlock_irqrestore(&s->lock, flags);
524 * If all has gone well, then the board should acknowledge
525 * the new upload and tell us that it has rebooted OK. We
526 * give it 5 seconds (max) ...
529 if (!obp_startup_ack(s, 5)) {
530 snd_printk(KERN_ERR "sscape: No response from on-board processor after upload\n");
532 } else if (!host_startup_ack(s, 5)) {
533 snd_printk(KERN_ERR "sscape: SoundScape failed to initialise\n");
539 * NOTE!!! We are NOT holding any spinlocks at this point !!!
541 sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_ODIE ? 0x70 : 0x40));
548 * Upload the bootblock(?) into the SoundScape. The only
549 * purpose of this block of code seems to be to tell
550 * us which version of the microcode we should be using.
552 * NOTE: The boot-block data resides in USER-SPACE!!!
553 * However, we have already verified its memory
554 * addresses by the time we get here.
556 static int sscape_upload_bootblock(struct soundscape *sscape, struct sscape_bootblock __user *bb)
562 ret = upload_dma_data(sscape, bb->code, sizeof(bb->code));
564 spin_lock_irqsave(&sscape->lock, flags);
566 data = host_read_ctrl_unsafe(sscape->io_base, 100);
568 set_midi_mode_unsafe(sscape->io_base);
569 spin_unlock_irqrestore(&sscape->lock, flags);
573 snd_printk(KERN_ERR "sscape: timeout reading firmware version\n");
576 __copy_to_user(&bb->version, &data, sizeof(bb->version));
584 * Upload the microcode into the SoundScape. The
585 * microcode is 64K of data, and if we try to copy
586 * it into a local variable then we will SMASH THE
587 * KERNEL'S STACK! We therefore leave it in USER
588 * SPACE, and save ourselves from copying it at all.
590 static int sscape_upload_microcode(struct soundscape *sscape,
591 const struct sscape_microcode __user *mc)
598 * We are going to have to copy this data into a special
599 * DMA-able buffer before we can upload it. We shall therefore
600 * just check that the data pointer is valid for now.
602 * NOTE: This buffer is 64K long! That's WAY too big to
603 * copy into a stack-temporary anyway.
605 if (get_user(code, &mc->code))
607 if ((err = verify_area(VERIFY_READ, code, SSCAPE_MICROCODE_SIZE)) != 0)
610 if ((ret = upload_dma_data(sscape, code, SSCAPE_MICROCODE_SIZE)) == 0) {
611 snd_printk(KERN_INFO "sscape: MIDI firmware loaded\n");
614 spin_lock_irqsave(&sscape->lock, flags);
615 set_midi_mode_unsafe(sscape->io_base);
616 spin_unlock_irqrestore(&sscape->lock, flags);
618 initialise_mpu401(sscape->mpu);
624 * Hardware-specific device functions, to implement special
625 * IOCTLs for the SoundScape card. This is how we upload
626 * the microcode into the card, for example, and so we
627 * must ensure that no two processes can open this device
628 * simultaneously, and that we can't open it at all if
629 * someone is using the MIDI device.
631 static int sscape_hw_open(snd_hwdep_t * hw, struct file *file)
633 register struct soundscape *sscape = get_hwdep_soundscape(hw);
637 spin_lock_irqsave(&sscape->fwlock, flags);
639 if ((sscape->midi_usage != 0) || sscape->hw_in_use) {
642 sscape->hw_in_use = 1;
646 spin_unlock_irqrestore(&sscape->fwlock, flags);
650 static int sscape_hw_release(snd_hwdep_t * hw, struct file *file)
652 register struct soundscape *sscape = get_hwdep_soundscape(hw);
655 spin_lock_irqsave(&sscape->fwlock, flags);
656 sscape->hw_in_use = 0;
657 spin_unlock_irqrestore(&sscape->fwlock, flags);
661 static int sscape_hw_ioctl(snd_hwdep_t * hw, struct file *file,
662 unsigned int cmd, unsigned long arg)
664 struct soundscape *sscape = get_hwdep_soundscape(hw);
668 case SND_SSCAPE_LOAD_BOOTB:
670 register struct sscape_bootblock __user *bb = (struct sscape_bootblock __user *) arg;
673 * We are going to have to copy this data into a special
674 * DMA-able buffer before we can upload it. We shall therefore
675 * just check that the data pointer is valid for now ...
677 if ((err = verify_area(VERIFY_READ, bb->code, sizeof(bb->code))) != 0)
681 * Now check that we can write the firmware version number too...
683 if ((err = verify_area(VERIFY_WRITE, &bb->version, sizeof(bb->version))) != 0)
686 err = sscape_upload_bootblock(sscape, bb);
690 case SND_SSCAPE_LOAD_MCODE:
692 register const struct sscape_microcode __user *mc = (const struct sscape_microcode __user *) arg;
694 err = sscape_upload_microcode(sscape, mc);
708 * Mixer control for the SoundScape's MIDI device.
710 static int sscape_midi_info(snd_kcontrol_t * ctl,
711 snd_ctl_elem_info_t * uinfo)
713 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
715 uinfo->value.integer.min = 0;
716 uinfo->value.integer.max = 127;
720 static int sscape_midi_get(snd_kcontrol_t * kctl,
721 snd_ctl_elem_value_t * uctl)
723 cs4231_t *chip = snd_kcontrol_chip(kctl);
724 snd_card_t *card = chip->card;
725 register struct soundscape *s = get_card_soundscape(card);
728 spin_lock_irqsave(&s->lock, flags);
729 set_host_mode_unsafe(s->io_base);
731 if (host_write_ctrl_unsafe(s->io_base, CMD_GET_MIDI_VOL, 100)) {
732 uctl->value.integer.value[0] = host_read_ctrl_unsafe(s->io_base, 100);
735 set_midi_mode_unsafe(s->io_base);
736 spin_unlock_irqrestore(&s->lock, flags);
740 static int sscape_midi_put(snd_kcontrol_t * kctl,
741 snd_ctl_elem_value_t * uctl)
743 cs4231_t *chip = snd_kcontrol_chip(kctl);
744 snd_card_t *card = chip->card;
745 register struct soundscape *s = get_card_soundscape(card);
749 spin_lock_irqsave(&s->lock, flags);
752 * We need to put the board into HOST mode before we
753 * can send any volume-changing HOST commands ...
755 set_host_mode_unsafe(s->io_base);
758 * To successfully change the MIDI volume setting, you seem to
759 * have to write a volume command, write the new volume value,
760 * and then perform another volume-related command. Perhaps the
761 * first command is an "open" and the second command is a "close"?
763 if (s->midi_vol == ((unsigned char) uctl->value.integer. value[0] & 127)) {
767 change = (host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
768 && host_write_ctrl_unsafe(s->io_base, ((unsigned char) uctl->value.integer. value[0]) & 127, 100)
769 && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100));
773 * Take the board out of HOST mode and back into MIDI mode ...
775 set_midi_mode_unsafe(s->io_base);
777 spin_unlock_irqrestore(&s->lock, flags);
781 static snd_kcontrol_new_t midi_mixer_ctl = {
782 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
784 .info = sscape_midi_info,
785 .get = sscape_midi_get,
786 .put = sscape_midi_put
790 * The SoundScape can use two IRQs from a possible set of four.
791 * These IRQs are encoded as bit patterns so that they can be
792 * written to the control registers.
794 static unsigned __devinit get_irq_config(int irq)
796 static const int valid_irq[] = { 9, 5, 7, 10 };
799 for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg) {
800 if (irq == valid_irq[cfg])
809 * Perform certain arcane port-checks to see whether there
810 * is a SoundScape board lurking behind the given ports.
812 static int __devinit detect_sscape(struct soundscape *s)
818 spin_lock_irqsave(&s->lock, flags);
821 * The following code is lifted from the original OSS driver,
822 * and as I don't have a datasheet I cannot really comment
823 * on what it is doing...
825 if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
828 d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
834 s->ic_type = IC_ODIE;
835 } else if ((d & 0x60) != 0) {
837 s->ic_type = IC_OPUS;
841 outb(0xfa, ODIE_ADDR_IO(s->io_base));
842 if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
845 outb(0xfe, ODIE_ADDR_IO(s->io_base));
846 if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
848 if ((inb(ODIE_DATA_IO(s->io_base)) & 0x9f) != 0x0e)
852 * SoundScape successfully detected!
857 spin_unlock_irqrestore(&s->lock, flags);
862 * ALSA callback function, called when attempting to open the MIDI device.
863 * Check that the MIDI firmware has been loaded, because we don't want
864 * to crash the machine. Also check that someone isn't using the hardware
867 static int mpu401_open(mpu401_t * mpu)
871 if (!verify_mpu401(mpu)) {
872 snd_printk(KERN_ERR "sscape: MIDI disabled, please load firmware\n");
875 register struct soundscape *sscape = get_mpu401_soundscape(mpu);
878 spin_lock_irqsave(&sscape->fwlock, flags);
880 if (sscape->hw_in_use || (sscape->midi_usage == ULONG_MAX)) {
883 ++(sscape->midi_usage);
887 spin_unlock_irqrestore(&sscape->fwlock, flags);
893 static void mpu401_close(mpu401_t * mpu)
895 register struct soundscape *sscape = get_mpu401_soundscape(mpu);
898 spin_lock_irqsave(&sscape->fwlock, flags);
899 --(sscape->midi_usage);
900 spin_unlock_irqrestore(&sscape->fwlock, flags);
904 * Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
906 static int __devinit create_mpu401(snd_card_t * card, int devnum, unsigned long port, int irq)
908 struct soundscape *sscape = get_card_soundscape(card);
909 snd_rawmidi_t *rawmidi;
912 #define MPU401_SHARE_HARDWARE 1
913 if ((err = snd_mpu401_uart_new(card, devnum,
915 port, MPU401_SHARE_HARDWARE,
918 mpu401_t *mpu = (mpu401_t *) rawmidi->private_data;
919 mpu->open_input = mpu401_open;
920 mpu->open_output = mpu401_open;
921 mpu->close_input = mpu401_close;
922 mpu->close_output = mpu401_close;
923 mpu->private_data = sscape;
926 initialise_mpu401(mpu);
934 * Override for the CS4231 playback format function.
935 * The AD1845 has much simpler format and rate selection.
937 static void ad1845_playback_format(cs4231_t * chip, snd_pcm_hw_params_t * params, unsigned char format)
940 unsigned rate = params_rate(params);
943 * The AD1845 can't handle sample frequencies
944 * outside of 4 kHZ to 50 kHZ
948 else if (rate < 4000)
951 spin_lock_irqsave(&chip->reg_lock, flags);
954 * Program the AD1845 correctly for the playback stream.
955 * Note that we do NOT need to toggle the MCE bit because
956 * the PLAYBACK_ENABLE bit of the Interface Configuration
959 * NOTE: We seem to need to write to the MSB before the LSB
960 * to get the correct sample frequency.
962 snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, (format & 0xf0));
963 snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8));
964 snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate);
966 spin_unlock_irqrestore(&chip->reg_lock, flags);
970 * Override for the CS4231 capture format function.
971 * The AD1845 has much simpler format and rate selection.
973 static void ad1845_capture_format(cs4231_t * chip, snd_pcm_hw_params_t * params, unsigned char format)
976 unsigned rate = params_rate(params);
979 * The AD1845 can't handle sample frequencies
980 * outside of 4 kHZ to 50 kHZ
984 else if (rate < 4000)
987 spin_lock_irqsave(&chip->reg_lock, flags);
990 * Program the AD1845 correctly for the playback stream.
991 * Note that we do NOT need to toggle the MCE bit because
992 * the CAPTURE_ENABLE bit of the Interface Configuration
995 * NOTE: We seem to need to write to the MSB before the LSB
996 * to get the correct sample frequency.
998 snd_cs4231_out(chip, CS4231_REC_FORMAT, (format & 0xf0));
999 snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8));
1000 snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate);
1002 spin_unlock_irqrestore(&chip->reg_lock, flags);
1006 * Create an AD1845 PCM subdevice on the SoundScape. The AD1845
1007 * is very much like a CS4231, with a few extra bits. We will
1008 * try to support at least some of the extra bits by overriding
1009 * some of the CS4231 callback.
1011 static int __devinit create_ad1845(snd_card_t * card, unsigned port, int irq, int dma1)
1013 register struct soundscape *sscape = get_card_soundscape(card);
1017 #define CS4231_SHARE_HARDWARE (CS4231_HWSHARE_DMA1 | CS4231_HWSHARE_DMA2)
1019 * The AD1845 PCM device is only half-duplex, and so
1020 * we only give it one DMA channel ...
1022 if ((err = snd_cs4231_create(card,
1023 port, -1, irq, dma1, dma1,
1025 CS4231_HWSHARE_DMA1, &chip)) == 0) {
1026 unsigned long flags;
1029 #define AD1845_FREQ_SEL_ENABLE 0x08
1031 #define AD1845_PWR_DOWN_CTRL 0x1b
1032 #define AD1845_CRYS_CLOCK_SEL 0x1d
1035 * It turns out that the PLAYBACK_ENABLE bit is set
1036 * by the lowlevel driver ...
1038 #define AD1845_IFACE_CONFIG \
1039 (CS4231_AUTOCALIB | CS4231_RECORD_ENABLE | CS4231_PLAYBACK_ENABLE)
1040 snd_cs4231_mce_up(chip);
1041 spin_lock_irqsave(&chip->reg_lock, flags);
1042 snd_cs4231_out(chip, CS4231_IFACE_CTRL, AD1845_IFACE_CONFIG);
1043 spin_unlock_irqrestore(&chip->reg_lock, flags);
1044 snd_cs4231_mce_down(chip);
1048 * The input clock frequency on the SoundScape must
1049 * be 14.31818 MHz, because we must set this register
1050 * to get the playback to sound correct ...
1052 snd_cs4231_mce_up(chip);
1053 spin_lock_irqsave(&chip->reg_lock, flags);
1054 snd_cs4231_out(chip, AD1845_CRYS_CLOCK_SEL, 0x20);
1055 spin_unlock_irqrestore(&chip->reg_lock, flags);
1056 snd_cs4231_mce_down(chip);
1059 * More custom configuration:
1060 * a) select "mode 2", and provide a current drive of 8 mA
1061 * b) enable frequency selection (for capture/playback)
1063 spin_lock_irqsave(&chip->reg_lock, flags);
1064 snd_cs4231_out(chip, CS4231_MISC_INFO, (CS4231_MODE2 | 0x10));
1065 snd_cs4231_out(chip, AD1845_PWR_DOWN_CTRL, snd_cs4231_in(chip, AD1845_PWR_DOWN_CTRL) | AD1845_FREQ_SEL_ENABLE);
1066 spin_unlock_irqrestore(&chip->reg_lock, flags);
1068 if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0) {
1069 snd_printk(KERN_ERR "sscape: No PCM device for AD1845 chip\n");
1073 if ((err = snd_cs4231_mixer(chip)) < 0) {
1074 snd_printk(KERN_ERR "sscape: No mixer device for AD1845 chip\n");
1078 if ((err = snd_ctl_add(card, snd_ctl_new1(&midi_mixer_ctl, chip))) < 0) {
1079 snd_printk(KERN_ERR "sscape: Could not create MIDI mixer control\n");
1083 strcpy(card->driver, "SoundScape");
1084 strcpy(card->shortname, pcm->name);
1085 snprintf(card->longname, sizeof(card->longname),
1086 "%s at 0x%lx, IRQ %d, DMA %d\n",
1087 pcm->name, chip->port, chip->irq, chip->dma1);
1088 chip->set_playback_format = ad1845_playback_format;
1089 chip->set_capture_format = ad1845_capture_format;
1090 sscape->chip = chip;
1109 static inline struct params*
1110 init_params(struct params *params,
1118 params->index = index;
1120 params->port = port;
1122 params->mpu_irq = mpu_irq;
1123 params->dma1 = (dma1 & 0x03);
1130 * Create an ALSA soundcard entry for the SoundScape, using
1131 * the given list of port, IRQ and DMA resources.
1133 static int __devinit create_sscape(const struct params *params, snd_card_t **rcardp)
1136 register struct soundscape *sscape;
1137 register unsigned dma_cfg;
1139 unsigned mpu_irq_cfg;
1140 struct resource *io_res;
1141 unsigned long flags;
1145 * Check that the user didn't pass us garbage data ...
1147 irq_cfg = get_irq_config(params->irq);
1148 if (irq_cfg == INVALID_IRQ) {
1149 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", params->irq);
1153 mpu_irq_cfg = get_irq_config(params->mpu_irq);
1154 if (mpu_irq_cfg == INVALID_IRQ) {
1155 printk(KERN_ERR "sscape: Invalid IRQ %d\n", params->mpu_irq);
1160 * Grab IO ports that we will need to probe so that we
1161 * can detect and control this hardware ...
1163 if ((io_res = request_region(params->port, 8, "SoundScape")) == NULL) {
1164 snd_printk(KERN_ERR "sscape: can't grab port 0x%x\n", params->port);
1169 * Grab both DMA channels (OK, only one for now) ...
1171 if ((err = request_dma(params->dma1, "SoundScape")) < 0) {
1172 snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", params->dma1);
1173 goto _release_region;
1177 * Create a new ALSA sound card entry, in anticipation
1178 * of detecting our hardware ...
1180 if ((card = snd_card_new(params->index, params->id, THIS_MODULE, sizeof(struct soundscape))) == NULL) {
1185 sscape = get_card_soundscape(card);
1186 spin_lock_init(&sscape->lock);
1187 spin_lock_init(&sscape->fwlock);
1188 sscape->io_res = io_res;
1189 sscape->io_base = params->port;
1191 if (!detect_sscape(sscape)) {
1192 printk(KERN_ERR "sscape: hardware not detected at 0x%x\n", sscape->io_base);
1197 printk(KERN_INFO "sscape: hardware detected at 0x%x, using IRQ %d, DMA %d\n",
1198 sscape->io_base, params->irq, params->dma1);
1201 * Now create the hardware-specific device so that we can
1202 * load the microcode into the on-board processor.
1203 * We cannot use the MPU-401 MIDI system until this firmware
1204 * has been loaded into the card.
1206 if ((err = snd_hwdep_new(card, "MC68EC000", 0, &(sscape->hw))) < 0) {
1207 printk(KERN_ERR "sscape: Failed to create firmware device\n");
1210 strlcpy(sscape->hw->name, "SoundScape M68K", sizeof(sscape->hw->name));
1211 sscape->hw->name[sizeof(sscape->hw->name) - 1] = '\0';
1212 sscape->hw->iface = SNDRV_HWDEP_IFACE_SSCAPE;
1213 sscape->hw->ops.open = sscape_hw_open;
1214 sscape->hw->ops.release = sscape_hw_release;
1215 sscape->hw->ops.ioctl = sscape_hw_ioctl;
1216 sscape->hw->private_data = sscape;
1219 * Tell the on-board devices where their resources are (I think -
1220 * I can't be sure without a datasheet ... So many magic values!)
1222 spin_lock_irqsave(&sscape->lock, flags);
1224 activate_ad1845_unsafe(sscape->io_base);
1226 sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x00); /* disable */
1227 sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
1228 sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
1231 * Enable and configure the DMA channels ...
1233 sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
1234 dma_cfg = (sscape->ic_type == IC_ODIE ? 0x70 : 0x40);
1235 sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
1236 sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
1238 sscape_write_unsafe(sscape->io_base,
1239 GA_INTCFG_REG, 0xf0 | (mpu_irq_cfg << 2) | mpu_irq_cfg);
1240 sscape_write_unsafe(sscape->io_base,
1241 GA_CDCFG_REG, 0x09 | DMA_8BIT | (params->dma1 << 4) | (irq_cfg << 1));
1243 spin_unlock_irqrestore(&sscape->lock, flags);
1246 * We have now enabled the codec chip, and so we should
1247 * detect the AD1845 device ...
1249 if ((err = create_ad1845(card, CODEC_IO(params->port), params->irq, params->dma1)) < 0) {
1250 printk(KERN_ERR "sscape: No AD1845 device at 0x%x, IRQ %d\n",
1251 CODEC_IO(params->port), params->irq);
1254 #define MIDI_DEVNUM 0
1255 if ((err = create_mpu401(card, MIDI_DEVNUM, MPU401_IO(params->port), params->mpu_irq)) < 0) {
1256 printk(KERN_ERR "sscape: Failed to create MPU-401 device at 0x%x\n",
1257 MPU401_IO(params->port));
1262 * Enable the master IRQ ...
1264 sscape_write(sscape, GA_INTENA_REG, 0x80);
1266 if ((err = snd_card_register(card)) < 0) {
1267 printk(KERN_ERR "sscape: Failed to register sound card\n");
1274 sscape->midi_vol = 0;
1275 host_write_ctrl_unsafe(sscape->io_base, CMD_SET_MIDI_VOL, 100);
1276 host_write_ctrl_unsafe(sscape->io_base, 0, 100);
1277 host_write_ctrl_unsafe(sscape->io_base, CMD_XXX_MIDI_VOL, 100);
1280 * Now that we have successfully created this sound card,
1281 * it is safe to store the pointer.
1282 * NOTE: we only register the sound card's "destructor"
1283 * function now that our "constructor" has completed.
1285 card->private_free = soundscape_free;
1291 snd_card_free(card);
1294 free_dma(params->dma1);
1297 release_resource(io_res);
1298 kfree_nocheck(io_res);
1304 static int sscape_cards __devinitdata;
1305 static struct params sscape_params[SNDRV_CARDS] __devinitdata;
1308 static inline int __devinit get_next_autoindex(int i)
1310 while ((i < SNDRV_CARDS) && (port[i] != SNDRV_AUTO_PORT)) {
1318 static inline int __devinit is_port_known(unsigned io, struct params *params, int cards)
1320 while (--cards >= 0) {
1321 if (params[cards].port == io)
1328 static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard,
1329 const struct pnp_card_device_id *pid)
1331 struct pnp_dev *dev;
1336 * Allow this function to fail *quietly* if all the ISA PnP
1337 * devices were configured using module parameters instead.
1339 if ((idx = get_next_autoindex(idx)) >= SNDRV_CARDS) {
1344 * We have found a candidate ISA PnP card. Now we
1345 * have to check that it has the devices that we
1346 * expect it to have.
1348 * We will NOT try and autoconfigure all of the resources
1349 * needed and then activate the card as we are assuming that
1350 * has already been done at boot-time using /proc/isapnp.
1351 * We shall simply try to give each active card the resources
1352 * that it wants. This is a sensible strategy for a modular
1353 * system where unused modules are unloaded regularly.
1355 * This strategy is utterly useless if we compile the driver
1356 * into the kernel, of course.
1358 // printk(KERN_INFO "sscape: %s\n", card->name);
1361 * Check that we still have room for another sound card ...
1363 if (sscape_cards >= SNDRV_CARDS) {
1364 printk(KERN_ERR "sscape: No room for another ALSA device\n");
1370 dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
1372 struct params *this;
1373 if (!pnp_is_active(dev)) {
1374 if (pnp_activate_dev(dev) < 0) {
1375 printk(KERN_INFO "sscape: device is inactive\n");
1380 * Read the correct parameters off the ISA PnP bus ...
1382 this = init_params(&sscape_params[sscape_cards],
1385 pnp_port_start(dev, 0),
1391 * Do we know about this sound card already?
1393 if ( !is_port_known(this->port, sscape_params, sscape_cards) ) {
1396 ret = create_sscape(this, &card);
1399 snd_card_set_dev(card, &pcard->card->dev);
1400 pnp_set_card_drvdata(pcard, card);
1409 static void __devexit sscape_pnp_remove(struct pnp_card_link * pcard)
1411 snd_card_t *card = (snd_card_t *) pnp_get_card_drvdata(pcard);
1413 pnp_set_card_drvdata(pcard, NULL);
1414 snd_card_disconnect(card);
1415 snd_card_free_in_thread(card);
1418 static struct pnp_card_driver sscape_pnpc_driver = {
1419 .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1421 .id_table = sscape_pnpids,
1422 .probe = sscape_pnp_detect,
1423 .remove = __devexit_p(sscape_pnp_remove),
1426 #endif /* CONFIG_PNP */
1428 static int __init sscape_manual_probe(struct params *params)
1434 for (i = 0; i < SNDRV_CARDS; ++i) {
1436 * We do NOT probe for ports.
1437 * If we're not given a port number for this
1438 * card then we completely ignore this line
1441 if (port[i] == SNDRV_AUTO_PORT)
1445 * Make sure we were given ALL of the other parameters.
1447 if ( (irq[i] == SNDRV_AUTO_IRQ) ||
1448 (mpu_irq[i] == SNDRV_AUTO_IRQ) ||
1449 (dma[i] == SNDRV_AUTO_DMA) ) {
1451 "sscape: insufficient parameters, need IO, IRQ, MPU-IRQ and DMA\n");
1456 * This cards looks OK ...
1458 init_params(params, index[i], id[i], port[i], irq[i], mpu_irq[i], dma[i]);
1460 ret = create_sscape(params, &card);
1464 sscape_card[sscape_cards] = card;
1473 static void sscape_exit(void)
1478 pnp_unregister_card_driver(&sscape_pnpc_driver);
1480 for (i = 0; i < ARRAY_SIZE(sscape_card); ++i) {
1481 snd_card_free(sscape_card[i]);
1486 static int __init sscape_init(void)
1491 * First check whether we were passed any parameters.
1492 * These MUST take precedence over ANY automatic way
1493 * of allocating cards, because the operator is
1494 * S-P-E-L-L-I-N-G it out for us...
1496 ret = sscape_manual_probe(sscape_params);
1499 for (i = 0; i < sscape_cards; ++i)
1500 snd_card_free(sscape_card[i]);
1505 if (sscape_cards < SNDRV_CARDS) {
1506 ret = pnp_register_card_driver(&sscape_pnpc_driver);
1517 module_init(sscape_init);
1518 module_exit(sscape_exit);