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/err.h>
27 #include <linux/platform_device.h>
28 #include <linux/delay.h>
29 #include <linux/pnp.h>
30 #include <linux/spinlock.h>
31 #include <linux/moduleparam.h>
33 #include <sound/core.h>
34 #include <sound/hwdep.h>
35 #include <sound/cs4231.h>
36 #include <sound/mpu401.h>
37 #include <sound/initval.h>
39 #include <sound/sscape_ioctl.h>
42 MODULE_AUTHOR("Chris Rankin");
43 MODULE_DESCRIPTION("ENSONIQ SoundScape PnP driver");
44 MODULE_LICENSE("GPL");
46 static int index[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IDX;
47 static char* id[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_STR;
48 static long port[SNDRV_CARDS] __devinitdata = { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_PORT };
49 static int irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ;
50 static int mpu_irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ;
51 static int dma[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_DMA;
53 module_param_array(index, int, NULL, 0444);
54 MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
56 module_param_array(id, charp, NULL, 0444);
57 MODULE_PARM_DESC(id, "Description for SoundScape card");
59 module_param_array(port, long, NULL, 0444);
60 MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
62 module_param_array(irq, int, NULL, 0444);
63 MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
65 module_param_array(mpu_irq, int, NULL, 0444);
66 MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
68 module_param_array(dma, int, NULL, 0444);
69 MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
71 static struct platform_device *platform_devices[SNDRV_CARDS];
74 static int pnp_registered;
75 static struct pnp_card_device_id sscape_pnpids[] = {
76 { .id = "ENS3081", .devs = { { "ENS0000" } } },
77 { .id = "" } /* end */
80 MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
84 #define MPU401_IO(i) ((i) + 0)
85 #define MIDI_DATA_IO(i) ((i) + 0)
86 #define MIDI_CTRL_IO(i) ((i) + 1)
87 #define HOST_CTRL_IO(i) ((i) + 2)
88 #define HOST_DATA_IO(i) ((i) + 3)
89 #define ODIE_ADDR_IO(i) ((i) + 4)
90 #define ODIE_DATA_IO(i) ((i) + 5)
91 #define CODEC_IO(i) ((i) + 8)
100 #define CMD_SET_MIDI_VOL 0x84
101 #define CMD_GET_MIDI_VOL 0x85
102 #define CMD_XXX_MIDI_VOL 0x86
103 #define CMD_SET_EXTMIDI 0x8a
104 #define CMD_GET_EXTMIDI 0x8b
105 #define CMD_SET_MT32 0x8c
106 #define CMD_GET_MT32 0x8d
121 #define DMA_8BIT 0x80
124 #define AD1845_FREQ_SEL_MSB 0x16
125 #define AD1845_FREQ_SEL_LSB 0x17
132 struct resource *io_res;
133 struct snd_cs4231 *chip;
134 struct snd_mpu401 *mpu;
135 struct snd_hwdep *hw;
138 * The MIDI device won't work until we've loaded
139 * its firmware via a hardware-dependent device IOCTL
143 unsigned long midi_usage;
144 unsigned char midi_vol;
147 #define INVALID_IRQ ((unsigned)-1)
150 static inline struct soundscape *get_card_soundscape(struct snd_card *c)
152 return (struct soundscape *) (c->private_data);
155 static inline struct soundscape *get_mpu401_soundscape(struct snd_mpu401 * mpu)
157 return (struct soundscape *) (mpu->private_data);
160 static inline struct soundscape *get_hwdep_soundscape(struct snd_hwdep * hw)
162 return (struct soundscape *) (hw->private_data);
167 * Allocates some kernel memory that we can use for DMA.
168 * I think this means that the memory has to map to
169 * contiguous pages of physical memory.
171 static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf, unsigned long size)
174 if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
176 snd_printk(KERN_ERR "sscape: Failed to allocate %lu bytes for DMA\n", size);
185 * Release the DMA-able kernel memory ...
187 static void free_dmabuf(struct snd_dma_buffer *buf)
189 if (buf && buf->area)
190 snd_dma_free_pages(buf);
195 * This function writes to the SoundScape's control registers,
196 * but doesn't do any locking. It's up to the caller to do that.
197 * This is why this function is "unsafe" ...
199 static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg, unsigned char val)
201 outb(reg, ODIE_ADDR_IO(io_base));
202 outb(val, ODIE_DATA_IO(io_base));
206 * Write to the SoundScape's control registers, and do the
207 * necessary locking ...
209 static void sscape_write(struct soundscape *s, enum GA_REG reg, unsigned char val)
213 spin_lock_irqsave(&s->lock, flags);
214 sscape_write_unsafe(s->io_base, reg, val);
215 spin_unlock_irqrestore(&s->lock, flags);
219 * Read from the SoundScape's control registers, but leave any
220 * locking to the caller. This is why the function is "unsafe" ...
222 static inline unsigned char sscape_read_unsafe(unsigned io_base, enum GA_REG reg)
224 outb(reg, ODIE_ADDR_IO(io_base));
225 return inb(ODIE_DATA_IO(io_base));
229 * Puts the SoundScape into "host" mode, as compared to "MIDI" mode
231 static inline void set_host_mode_unsafe(unsigned io_base)
233 outb(0x0, HOST_CTRL_IO(io_base));
237 * Puts the SoundScape into "MIDI" mode, as compared to "host" mode
239 static inline void set_midi_mode_unsafe(unsigned io_base)
241 outb(0x3, HOST_CTRL_IO(io_base));
245 * Read the SoundScape's host-mode control register, but leave
246 * any locking issues to the caller ...
248 static inline int host_read_unsafe(unsigned io_base)
251 if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0) {
252 data = inb(HOST_DATA_IO(io_base));
259 * Read the SoundScape's host-mode control register, performing
260 * a limited amount of busy-waiting if the register isn't ready.
261 * Also leaves all locking-issues to the caller ...
263 static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
267 while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
276 * Write to the SoundScape's host-mode control registers, but
277 * leave any locking issues to the caller ...
279 static inline int host_write_unsafe(unsigned io_base, unsigned char data)
281 if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
282 outb(data, HOST_DATA_IO(io_base));
290 * Write to the SoundScape's host-mode control registers, performing
291 * a limited amount of busy-waiting if the register isn't ready.
292 * Also leaves all locking-issues to the caller ...
294 static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
299 while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
309 * Check that the MIDI subsystem is operational. If it isn't,
310 * then we will hang the computer if we try to use it ...
312 * NOTE: This check is based upon observation, not documentation.
314 static inline int verify_mpu401(const struct snd_mpu401 * mpu)
316 return ((inb(MIDI_CTRL_IO(mpu->port)) & 0xc0) == 0x80);
320 * This is apparently the standard way to initailise an MPU-401
322 static inline void initialise_mpu401(const struct snd_mpu401 * mpu)
324 outb(0, MIDI_DATA_IO(mpu->port));
328 * Tell the SoundScape to activate the AD1845 chip (I think).
329 * The AD1845 detection fails if we *don't* do this, so I
330 * think that this is a good idea ...
332 static inline void activate_ad1845_unsafe(unsigned io_base)
334 sscape_write_unsafe(io_base, GA_HMCTL_REG, (sscape_read_unsafe(io_base, GA_HMCTL_REG) & 0xcf) | 0x10);
335 sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
339 * Do the necessary ALSA-level cleanup to deallocate our driver ...
341 static void soundscape_free(struct snd_card *c)
343 register struct soundscape *sscape = get_card_soundscape(c);
344 release_and_free_resource(sscape->io_res);
345 free_dma(sscape->chip->dma1);
349 * Tell the SoundScape to begin a DMA tranfer using the given channel.
350 * All locking issues are left to the caller.
352 static inline void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
354 sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) | 0x01);
355 sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) & 0xfe);
359 * Wait for a DMA transfer to complete. This is a "limited busy-wait",
360 * and all locking issues are left to the caller.
362 static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg, unsigned timeout)
364 while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
369 return (sscape_read_unsafe(io_base, reg) & 0x01);
373 * Wait for the On-Board Processor to return its start-up
374 * acknowledgement sequence. This wait is too long for
375 * us to perform "busy-waiting", and so we must sleep.
376 * This in turn means that we must not be holding any
377 * spinlocks when we call this function.
379 static int obp_startup_ack(struct soundscape *s, unsigned timeout)
381 while (timeout != 0) {
385 schedule_timeout_interruptible(1);
387 spin_lock_irqsave(&s->lock, flags);
388 x = inb(HOST_DATA_IO(s->io_base));
389 spin_unlock_irqrestore(&s->lock, flags);
390 if ((x & 0xfe) == 0xfe)
400 * Wait for the host to return its start-up acknowledgement
401 * sequence. This wait is too long for us to perform
402 * "busy-waiting", and so we must sleep. This in turn means
403 * that we must not be holding any spinlocks when we call
406 static int host_startup_ack(struct soundscape *s, unsigned timeout)
408 while (timeout != 0) {
412 schedule_timeout_interruptible(1);
414 spin_lock_irqsave(&s->lock, flags);
415 x = inb(HOST_DATA_IO(s->io_base));
416 spin_unlock_irqrestore(&s->lock, flags);
427 * Upload a byte-stream into the SoundScape using DMA channel A.
429 static int upload_dma_data(struct soundscape *s,
430 const unsigned char __user *data,
434 struct snd_dma_buffer dma;
437 if (!get_dmabuf(&dma, PAGE_ALIGN(size)))
440 spin_lock_irqsave(&s->lock, flags);
443 * Reset the board ...
445 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f);
448 * Enable the DMA channels and configure them ...
450 sscape_write_unsafe(s->io_base, GA_DMACFG_REG, 0x50);
451 sscape_write_unsafe(s->io_base, GA_DMAA_REG, (s->chip->dma1 << 4) | DMA_8BIT);
452 sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
455 * Take the board out of reset ...
457 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x80);
460 * Upload the user's data (firmware?) to the SoundScape
461 * board through the DMA channel ...
467 * Apparently, copying to/from userspace can sleep.
468 * We are therefore forbidden from holding any
469 * spinlocks while we copy ...
471 spin_unlock_irqrestore(&s->lock, flags);
474 * Remember that the data that we want to DMA
475 * comes from USERSPACE. We have already verified
476 * the userspace pointer ...
478 len = min(size, dma.bytes);
479 len -= __copy_from_user(dma.area, data, len);
484 * Grab that spinlock again, now that we've
487 spin_lock_irqsave(&s->lock, flags);
489 snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
490 sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
491 if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
493 * Don't forget to release this spinlock we're holding ...
495 spin_unlock_irqrestore(&s->lock, flags);
497 snd_printk(KERN_ERR "sscape: DMA upload has timed out\n");
503 set_host_mode_unsafe(s->io_base);
506 * Boot the board ... (I think)
508 sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x40);
509 spin_unlock_irqrestore(&s->lock, flags);
512 * If all has gone well, then the board should acknowledge
513 * the new upload and tell us that it has rebooted OK. We
514 * give it 5 seconds (max) ...
517 if (!obp_startup_ack(s, 5)) {
518 snd_printk(KERN_ERR "sscape: No response from on-board processor after upload\n");
520 } else if (!host_startup_ack(s, 5)) {
521 snd_printk(KERN_ERR "sscape: SoundScape failed to initialise\n");
527 * NOTE!!! We are NOT holding any spinlocks at this point !!!
529 sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_ODIE ? 0x70 : 0x40));
536 * Upload the bootblock(?) into the SoundScape. The only
537 * purpose of this block of code seems to be to tell
538 * us which version of the microcode we should be using.
540 * NOTE: The boot-block data resides in USER-SPACE!!!
541 * However, we have already verified its memory
542 * addresses by the time we get here.
544 static int sscape_upload_bootblock(struct soundscape *sscape, struct sscape_bootblock __user *bb)
550 ret = upload_dma_data(sscape, bb->code, sizeof(bb->code));
552 spin_lock_irqsave(&sscape->lock, flags);
554 data = host_read_ctrl_unsafe(sscape->io_base, 100);
556 set_midi_mode_unsafe(sscape->io_base);
557 spin_unlock_irqrestore(&sscape->lock, flags);
561 snd_printk(KERN_ERR "sscape: timeout reading firmware version\n");
564 else if (__copy_to_user(&bb->version, &data, sizeof(bb->version))) {
573 * Upload the microcode into the SoundScape. The
574 * microcode is 64K of data, and if we try to copy
575 * it into a local variable then we will SMASH THE
576 * KERNEL'S STACK! We therefore leave it in USER
577 * SPACE, and save ourselves from copying it at all.
579 static int sscape_upload_microcode(struct soundscape *sscape,
580 const struct sscape_microcode __user *mc)
587 * We are going to have to copy this data into a special
588 * DMA-able buffer before we can upload it. We shall therefore
589 * just check that the data pointer is valid for now.
591 * NOTE: This buffer is 64K long! That's WAY too big to
592 * copy into a stack-temporary anyway.
594 if ( get_user(code, &mc->code) ||
595 !access_ok(VERIFY_READ, code, SSCAPE_MICROCODE_SIZE) )
598 if ((err = upload_dma_data(sscape, code, SSCAPE_MICROCODE_SIZE)) == 0) {
599 snd_printk(KERN_INFO "sscape: MIDI firmware loaded\n");
602 spin_lock_irqsave(&sscape->lock, flags);
603 set_midi_mode_unsafe(sscape->io_base);
604 spin_unlock_irqrestore(&sscape->lock, flags);
606 initialise_mpu401(sscape->mpu);
612 * Hardware-specific device functions, to implement special
613 * IOCTLs for the SoundScape card. This is how we upload
614 * the microcode into the card, for example, and so we
615 * must ensure that no two processes can open this device
616 * simultaneously, and that we can't open it at all if
617 * someone is using the MIDI device.
619 static int sscape_hw_open(struct snd_hwdep * hw, struct file *file)
621 register struct soundscape *sscape = get_hwdep_soundscape(hw);
625 spin_lock_irqsave(&sscape->fwlock, flags);
627 if ((sscape->midi_usage != 0) || sscape->hw_in_use) {
630 sscape->hw_in_use = 1;
634 spin_unlock_irqrestore(&sscape->fwlock, flags);
638 static int sscape_hw_release(struct snd_hwdep * hw, struct file *file)
640 register struct soundscape *sscape = get_hwdep_soundscape(hw);
643 spin_lock_irqsave(&sscape->fwlock, flags);
644 sscape->hw_in_use = 0;
645 spin_unlock_irqrestore(&sscape->fwlock, flags);
649 static int sscape_hw_ioctl(struct snd_hwdep * hw, struct file *file,
650 unsigned int cmd, unsigned long arg)
652 struct soundscape *sscape = get_hwdep_soundscape(hw);
656 case SND_SSCAPE_LOAD_BOOTB:
658 register struct sscape_bootblock __user *bb = (struct sscape_bootblock __user *) arg;
661 * We are going to have to copy this data into a special
662 * DMA-able buffer before we can upload it. We shall therefore
663 * just check that the data pointer is valid for now ...
665 if ( !access_ok(VERIFY_READ, bb->code, sizeof(bb->code)) )
669 * Now check that we can write the firmware version number too...
671 if ( !access_ok(VERIFY_WRITE, &bb->version, sizeof(bb->version)) )
674 err = sscape_upload_bootblock(sscape, bb);
678 case SND_SSCAPE_LOAD_MCODE:
680 register const struct sscape_microcode __user *mc = (const struct sscape_microcode __user *) arg;
682 err = sscape_upload_microcode(sscape, mc);
696 * Mixer control for the SoundScape's MIDI device.
698 static int sscape_midi_info(struct snd_kcontrol *ctl,
699 struct snd_ctl_elem_info *uinfo)
701 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
703 uinfo->value.integer.min = 0;
704 uinfo->value.integer.max = 127;
708 static int sscape_midi_get(struct snd_kcontrol *kctl,
709 struct snd_ctl_elem_value *uctl)
711 struct snd_cs4231 *chip = snd_kcontrol_chip(kctl);
712 struct snd_card *card = chip->card;
713 register struct soundscape *s = get_card_soundscape(card);
716 spin_lock_irqsave(&s->lock, flags);
717 set_host_mode_unsafe(s->io_base);
719 if (host_write_ctrl_unsafe(s->io_base, CMD_GET_MIDI_VOL, 100)) {
720 uctl->value.integer.value[0] = host_read_ctrl_unsafe(s->io_base, 100);
723 set_midi_mode_unsafe(s->io_base);
724 spin_unlock_irqrestore(&s->lock, flags);
728 static int sscape_midi_put(struct snd_kcontrol *kctl,
729 struct snd_ctl_elem_value *uctl)
731 struct snd_cs4231 *chip = snd_kcontrol_chip(kctl);
732 struct snd_card *card = chip->card;
733 register struct soundscape *s = get_card_soundscape(card);
737 spin_lock_irqsave(&s->lock, flags);
740 * We need to put the board into HOST mode before we
741 * can send any volume-changing HOST commands ...
743 set_host_mode_unsafe(s->io_base);
746 * To successfully change the MIDI volume setting, you seem to
747 * have to write a volume command, write the new volume value,
748 * and then perform another volume-related command. Perhaps the
749 * first command is an "open" and the second command is a "close"?
751 if (s->midi_vol == ((unsigned char) uctl->value.integer. value[0] & 127)) {
755 change = (host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
756 && host_write_ctrl_unsafe(s->io_base, ((unsigned char) uctl->value.integer. value[0]) & 127, 100)
757 && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100));
761 * Take the board out of HOST mode and back into MIDI mode ...
763 set_midi_mode_unsafe(s->io_base);
765 spin_unlock_irqrestore(&s->lock, flags);
769 static struct snd_kcontrol_new midi_mixer_ctl = {
770 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
772 .info = sscape_midi_info,
773 .get = sscape_midi_get,
774 .put = sscape_midi_put
778 * The SoundScape can use two IRQs from a possible set of four.
779 * These IRQs are encoded as bit patterns so that they can be
780 * written to the control registers.
782 static unsigned __devinit get_irq_config(int irq)
784 static const int valid_irq[] = { 9, 5, 7, 10 };
787 for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg) {
788 if (irq == valid_irq[cfg])
797 * Perform certain arcane port-checks to see whether there
798 * is a SoundScape board lurking behind the given ports.
800 static int __devinit detect_sscape(struct soundscape *s)
806 spin_lock_irqsave(&s->lock, flags);
809 * The following code is lifted from the original OSS driver,
810 * and as I don't have a datasheet I cannot really comment
811 * on what it is doing...
813 if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
816 d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
822 s->ic_type = IC_ODIE;
823 } else if ((d & 0x60) != 0) {
825 s->ic_type = IC_OPUS;
829 outb(0xfa, ODIE_ADDR_IO(s->io_base));
830 if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
833 outb(0xfe, ODIE_ADDR_IO(s->io_base));
834 if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
836 if ((inb(ODIE_DATA_IO(s->io_base)) & 0x9f) != 0x0e)
840 * SoundScape successfully detected!
845 spin_unlock_irqrestore(&s->lock, flags);
850 * ALSA callback function, called when attempting to open the MIDI device.
851 * Check that the MIDI firmware has been loaded, because we don't want
852 * to crash the machine. Also check that someone isn't using the hardware
855 static int mpu401_open(struct snd_mpu401 * mpu)
859 if (!verify_mpu401(mpu)) {
860 snd_printk(KERN_ERR "sscape: MIDI disabled, please load firmware\n");
863 register struct soundscape *sscape = get_mpu401_soundscape(mpu);
866 spin_lock_irqsave(&sscape->fwlock, flags);
868 if (sscape->hw_in_use || (sscape->midi_usage == ULONG_MAX)) {
871 ++(sscape->midi_usage);
875 spin_unlock_irqrestore(&sscape->fwlock, flags);
881 static void mpu401_close(struct snd_mpu401 * mpu)
883 register struct soundscape *sscape = get_mpu401_soundscape(mpu);
886 spin_lock_irqsave(&sscape->fwlock, flags);
887 --(sscape->midi_usage);
888 spin_unlock_irqrestore(&sscape->fwlock, flags);
892 * Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
894 static int __devinit create_mpu401(struct snd_card *card, int devnum, unsigned long port, int irq)
896 struct soundscape *sscape = get_card_soundscape(card);
897 struct snd_rawmidi *rawmidi;
900 #define MPU401_SHARE_HARDWARE 1
901 if ((err = snd_mpu401_uart_new(card, devnum,
903 port, MPU401_SHARE_HARDWARE,
906 struct snd_mpu401 *mpu = (struct snd_mpu401 *) rawmidi->private_data;
907 mpu->open_input = mpu401_open;
908 mpu->open_output = mpu401_open;
909 mpu->close_input = mpu401_close;
910 mpu->close_output = mpu401_close;
911 mpu->private_data = sscape;
914 initialise_mpu401(mpu);
922 * Override for the CS4231 playback format function.
923 * The AD1845 has much simpler format and rate selection.
925 static void ad1845_playback_format(struct snd_cs4231 * chip, struct snd_pcm_hw_params *params, unsigned char format)
928 unsigned rate = params_rate(params);
931 * The AD1845 can't handle sample frequencies
932 * outside of 4 kHZ to 50 kHZ
936 else if (rate < 4000)
939 spin_lock_irqsave(&chip->reg_lock, flags);
942 * Program the AD1845 correctly for the playback stream.
943 * Note that we do NOT need to toggle the MCE bit because
944 * the PLAYBACK_ENABLE bit of the Interface Configuration
947 * NOTE: We seem to need to write to the MSB before the LSB
948 * to get the correct sample frequency.
950 snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, (format & 0xf0));
951 snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8));
952 snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate);
954 spin_unlock_irqrestore(&chip->reg_lock, flags);
958 * Override for the CS4231 capture format function.
959 * The AD1845 has much simpler format and rate selection.
961 static void ad1845_capture_format(struct snd_cs4231 * chip, struct snd_pcm_hw_params *params, unsigned char format)
964 unsigned rate = params_rate(params);
967 * The AD1845 can't handle sample frequencies
968 * outside of 4 kHZ to 50 kHZ
972 else if (rate < 4000)
975 spin_lock_irqsave(&chip->reg_lock, flags);
978 * Program the AD1845 correctly for the playback stream.
979 * Note that we do NOT need to toggle the MCE bit because
980 * the CAPTURE_ENABLE bit of the Interface Configuration
983 * NOTE: We seem to need to write to the MSB before the LSB
984 * to get the correct sample frequency.
986 snd_cs4231_out(chip, CS4231_REC_FORMAT, (format & 0xf0));
987 snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8));
988 snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate);
990 spin_unlock_irqrestore(&chip->reg_lock, flags);
994 * Create an AD1845 PCM subdevice on the SoundScape. The AD1845
995 * is very much like a CS4231, with a few extra bits. We will
996 * try to support at least some of the extra bits by overriding
997 * some of the CS4231 callback.
999 static int __devinit create_ad1845(struct snd_card *card, unsigned port, int irq, int dma1)
1001 register struct soundscape *sscape = get_card_soundscape(card);
1002 struct snd_cs4231 *chip;
1005 #define CS4231_SHARE_HARDWARE (CS4231_HWSHARE_DMA1 | CS4231_HWSHARE_DMA2)
1007 * The AD1845 PCM device is only half-duplex, and so
1008 * we only give it one DMA channel ...
1010 if ((err = snd_cs4231_create(card,
1011 port, -1, irq, dma1, dma1,
1013 CS4231_HWSHARE_DMA1, &chip)) == 0) {
1014 unsigned long flags;
1015 struct snd_pcm *pcm;
1017 #define AD1845_FREQ_SEL_ENABLE 0x08
1019 #define AD1845_PWR_DOWN_CTRL 0x1b
1020 #define AD1845_CRYS_CLOCK_SEL 0x1d
1023 * It turns out that the PLAYBACK_ENABLE bit is set
1024 * by the lowlevel driver ...
1026 #define AD1845_IFACE_CONFIG \
1027 (CS4231_AUTOCALIB | CS4231_RECORD_ENABLE | CS4231_PLAYBACK_ENABLE)
1028 snd_cs4231_mce_up(chip);
1029 spin_lock_irqsave(&chip->reg_lock, flags);
1030 snd_cs4231_out(chip, CS4231_IFACE_CTRL, AD1845_IFACE_CONFIG);
1031 spin_unlock_irqrestore(&chip->reg_lock, flags);
1032 snd_cs4231_mce_down(chip);
1036 * The input clock frequency on the SoundScape must
1037 * be 14.31818 MHz, because we must set this register
1038 * to get the playback to sound correct ...
1040 snd_cs4231_mce_up(chip);
1041 spin_lock_irqsave(&chip->reg_lock, flags);
1042 snd_cs4231_out(chip, AD1845_CRYS_CLOCK_SEL, 0x20);
1043 spin_unlock_irqrestore(&chip->reg_lock, flags);
1044 snd_cs4231_mce_down(chip);
1047 * More custom configuration:
1048 * a) select "mode 2", and provide a current drive of 8 mA
1049 * b) enable frequency selection (for capture/playback)
1051 spin_lock_irqsave(&chip->reg_lock, flags);
1052 snd_cs4231_out(chip, CS4231_MISC_INFO, (CS4231_MODE2 | 0x10));
1053 snd_cs4231_out(chip, AD1845_PWR_DOWN_CTRL, snd_cs4231_in(chip, AD1845_PWR_DOWN_CTRL) | AD1845_FREQ_SEL_ENABLE);
1054 spin_unlock_irqrestore(&chip->reg_lock, flags);
1056 if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0) {
1057 snd_printk(KERN_ERR "sscape: No PCM device for AD1845 chip\n");
1061 if ((err = snd_cs4231_mixer(chip)) < 0) {
1062 snd_printk(KERN_ERR "sscape: No mixer device for AD1845 chip\n");
1066 if ((err = snd_ctl_add(card, snd_ctl_new1(&midi_mixer_ctl, chip))) < 0) {
1067 snd_printk(KERN_ERR "sscape: Could not create MIDI mixer control\n");
1071 strcpy(card->driver, "SoundScape");
1072 strcpy(card->shortname, pcm->name);
1073 snprintf(card->longname, sizeof(card->longname),
1074 "%s at 0x%lx, IRQ %d, DMA %d\n",
1075 pcm->name, chip->port, chip->irq, chip->dma1);
1076 chip->set_playback_format = ad1845_playback_format;
1077 chip->set_capture_format = ad1845_capture_format;
1078 sscape->chip = chip;
1087 * Create an ALSA soundcard entry for the SoundScape, using
1088 * the given list of port, IRQ and DMA resources.
1090 static int __devinit create_sscape(int dev, struct snd_card **rcardp)
1092 struct snd_card *card;
1093 register struct soundscape *sscape;
1094 register unsigned dma_cfg;
1096 unsigned mpu_irq_cfg;
1098 struct resource *io_res;
1099 unsigned long flags;
1103 * Check that the user didn't pass us garbage data ...
1105 irq_cfg = get_irq_config(irq[dev]);
1106 if (irq_cfg == INVALID_IRQ) {
1107 snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", irq[dev]);
1111 mpu_irq_cfg = get_irq_config(mpu_irq[dev]);
1112 if (mpu_irq_cfg == INVALID_IRQ) {
1113 printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
1119 * Grab IO ports that we will need to probe so that we
1120 * can detect and control this hardware ...
1122 if ((io_res = request_region(xport, 8, "SoundScape")) == NULL) {
1123 snd_printk(KERN_ERR "sscape: can't grab port 0x%x\n", xport);
1128 * Grab both DMA channels (OK, only one for now) ...
1130 if ((err = request_dma(dma[dev], "SoundScape")) < 0) {
1131 snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", dma[dev]);
1132 goto _release_region;
1136 * Create a new ALSA sound card entry, in anticipation
1137 * of detecting our hardware ...
1139 if ((card = snd_card_new(index[dev], id[dev], THIS_MODULE,
1140 sizeof(struct soundscape))) == NULL) {
1145 sscape = get_card_soundscape(card);
1146 spin_lock_init(&sscape->lock);
1147 spin_lock_init(&sscape->fwlock);
1148 sscape->io_res = io_res;
1149 sscape->io_base = xport;
1151 if (!detect_sscape(sscape)) {
1152 printk(KERN_ERR "sscape: hardware not detected at 0x%x\n", sscape->io_base);
1157 printk(KERN_INFO "sscape: hardware detected at 0x%x, using IRQ %d, DMA %d\n",
1158 sscape->io_base, irq[dev], dma[dev]);
1161 * Now create the hardware-specific device so that we can
1162 * load the microcode into the on-board processor.
1163 * We cannot use the MPU-401 MIDI system until this firmware
1164 * has been loaded into the card.
1166 if ((err = snd_hwdep_new(card, "MC68EC000", 0, &(sscape->hw))) < 0) {
1167 printk(KERN_ERR "sscape: Failed to create firmware device\n");
1170 strlcpy(sscape->hw->name, "SoundScape M68K", sizeof(sscape->hw->name));
1171 sscape->hw->name[sizeof(sscape->hw->name) - 1] = '\0';
1172 sscape->hw->iface = SNDRV_HWDEP_IFACE_SSCAPE;
1173 sscape->hw->ops.open = sscape_hw_open;
1174 sscape->hw->ops.release = sscape_hw_release;
1175 sscape->hw->ops.ioctl = sscape_hw_ioctl;
1176 sscape->hw->private_data = sscape;
1179 * Tell the on-board devices where their resources are (I think -
1180 * I can't be sure without a datasheet ... So many magic values!)
1182 spin_lock_irqsave(&sscape->lock, flags);
1184 activate_ad1845_unsafe(sscape->io_base);
1186 sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x00); /* disable */
1187 sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
1188 sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
1191 * Enable and configure the DMA channels ...
1193 sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
1194 dma_cfg = (sscape->ic_type == IC_ODIE ? 0x70 : 0x40);
1195 sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
1196 sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
1198 sscape_write_unsafe(sscape->io_base,
1199 GA_INTCFG_REG, 0xf0 | (mpu_irq_cfg << 2) | mpu_irq_cfg);
1200 sscape_write_unsafe(sscape->io_base,
1201 GA_CDCFG_REG, 0x09 | DMA_8BIT | (dma[dev] << 4) | (irq_cfg << 1));
1203 spin_unlock_irqrestore(&sscape->lock, flags);
1206 * We have now enabled the codec chip, and so we should
1207 * detect the AD1845 device ...
1209 if ((err = create_ad1845(card, CODEC_IO(xport), irq[dev], dma[dev])) < 0) {
1210 printk(KERN_ERR "sscape: No AD1845 device at 0x%x, IRQ %d\n",
1211 CODEC_IO(xport), irq[dev]);
1214 #define MIDI_DEVNUM 0
1215 if ((err = create_mpu401(card, MIDI_DEVNUM, MPU401_IO(xport), mpu_irq[dev])) < 0) {
1216 printk(KERN_ERR "sscape: Failed to create MPU-401 device at 0x%x\n",
1222 * Enable the master IRQ ...
1224 sscape_write(sscape, GA_INTENA_REG, 0x80);
1229 sscape->midi_vol = 0;
1230 host_write_ctrl_unsafe(sscape->io_base, CMD_SET_MIDI_VOL, 100);
1231 host_write_ctrl_unsafe(sscape->io_base, 0, 100);
1232 host_write_ctrl_unsafe(sscape->io_base, CMD_XXX_MIDI_VOL, 100);
1235 * Now that we have successfully created this sound card,
1236 * it is safe to store the pointer.
1237 * NOTE: we only register the sound card's "destructor"
1238 * function now that our "constructor" has completed.
1240 card->private_free = soundscape_free;
1246 snd_card_free(card);
1252 release_and_free_resource(io_res);
1258 static int __devinit snd_sscape_probe(struct platform_device *pdev)
1261 struct snd_card *card;
1265 ret = create_sscape(dev, &card);
1268 snd_card_set_dev(card, &pdev->dev);
1269 if ((ret = snd_card_register(card)) < 0) {
1270 printk(KERN_ERR "sscape: Failed to register sound card\n");
1273 platform_set_drvdata(pdev, card);
1277 static int __devexit snd_sscape_remove(struct platform_device *devptr)
1279 snd_card_free(platform_get_drvdata(devptr));
1280 platform_set_drvdata(devptr, NULL);
1284 #define SSCAPE_DRIVER "snd_sscape"
1286 static struct platform_driver snd_sscape_driver = {
1287 .probe = snd_sscape_probe,
1288 .remove = __devexit_p(snd_sscape_remove),
1289 /* FIXME: suspend/resume */
1291 .name = SSCAPE_DRIVER
1296 static inline int __devinit get_next_autoindex(int i)
1298 while (i < SNDRV_CARDS && port[i] != SNDRV_AUTO_PORT)
1304 static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard,
1305 const struct pnp_card_device_id *pid)
1308 struct pnp_dev *dev;
1309 struct snd_card *card;
1313 * Allow this function to fail *quietly* if all the ISA PnP
1314 * devices were configured using module parameters instead.
1316 if ((idx = get_next_autoindex(idx)) >= SNDRV_CARDS)
1320 * We have found a candidate ISA PnP card. Now we
1321 * have to check that it has the devices that we
1322 * expect it to have.
1324 * We will NOT try and autoconfigure all of the resources
1325 * needed and then activate the card as we are assuming that
1326 * has already been done at boot-time using /proc/isapnp.
1327 * We shall simply try to give each active card the resources
1328 * that it wants. This is a sensible strategy for a modular
1329 * system where unused modules are unloaded regularly.
1331 * This strategy is utterly useless if we compile the driver
1332 * into the kernel, of course.
1334 // printk(KERN_INFO "sscape: %s\n", card->name);
1337 * Check that we still have room for another sound card ...
1339 dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
1343 if (!pnp_is_active(dev)) {
1344 if (pnp_activate_dev(dev) < 0) {
1345 printk(KERN_INFO "sscape: device is inactive\n");
1351 * Read the correct parameters off the ISA PnP bus ...
1353 port[idx] = pnp_port_start(dev, 0);
1354 irq[idx] = pnp_irq(dev, 0);
1355 mpu_irq[idx] = pnp_irq(dev, 1);
1356 dma[idx] = pnp_dma(dev, 0) & 0x03;
1358 ret = create_sscape(idx, &card);
1361 snd_card_set_dev(card, &pcard->card->dev);
1362 if ((ret = snd_card_register(card)) < 0) {
1363 printk(KERN_ERR "sscape: Failed to register sound card\n");
1364 snd_card_free(card);
1368 pnp_set_card_drvdata(pcard, card);
1374 static void __devexit sscape_pnp_remove(struct pnp_card_link * pcard)
1376 snd_card_free(pnp_get_card_drvdata(pcard));
1377 pnp_set_card_drvdata(pcard, NULL);
1380 static struct pnp_card_driver sscape_pnpc_driver = {
1381 .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1383 .id_table = sscape_pnpids,
1384 .probe = sscape_pnp_detect,
1385 .remove = __devexit_p(sscape_pnp_remove),
1388 #endif /* CONFIG_PNP */
1390 static void __init_or_module sscape_unregister_all(void)
1396 pnp_unregister_card_driver(&sscape_pnpc_driver);
1398 for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
1399 platform_device_unregister(platform_devices[i]);
1400 platform_driver_unregister(&snd_sscape_driver);
1403 static int __init sscape_manual_probe(void)
1405 struct platform_device *device;
1408 ret = platform_driver_register(&snd_sscape_driver);
1412 for (i = 0; i < SNDRV_CARDS; ++i) {
1414 * We do NOT probe for ports.
1415 * If we're not given a port number for this
1416 * card then we completely ignore this line
1419 if (port[i] == SNDRV_AUTO_PORT)
1423 * Make sure we were given ALL of the other parameters.
1425 if (irq[i] == SNDRV_AUTO_IRQ ||
1426 mpu_irq[i] == SNDRV_AUTO_IRQ ||
1427 dma[i] == SNDRV_AUTO_DMA) {
1429 "sscape: insufficient parameters, need IO, IRQ, MPU-IRQ and DMA\n");
1435 * This cards looks OK ...
1437 device = platform_device_register_simple(SSCAPE_DRIVER,
1439 if (IS_ERR(device)) {
1440 ret = PTR_ERR(device);
1443 platform_devices[i] = device;
1448 sscape_unregister_all();
1452 static void sscape_exit(void)
1454 sscape_unregister_all();
1458 static int __init sscape_init(void)
1463 * First check whether we were passed any parameters.
1464 * These MUST take precedence over ANY automatic way
1465 * of allocating cards, because the operator is
1466 * S-P-E-L-L-I-N-G it out for us...
1468 ret = sscape_manual_probe();
1472 if (pnp_register_card_driver(&sscape_pnpc_driver) == 0)
1478 module_init(sscape_init);
1479 module_exit(sscape_exit);