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remarkable-linux/sound/isa/sscape.c
Rene Herman dcccdd938e [ALSA] unregister platform device again if probe was unsuccessful 
Unregister the platform device again if the probe was unsuccessful.

This restores the behaviour of not loading the driver on probe() failure.

Signed-off-by: Rene Herman <rene.herman@keyaccess.nl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-12 11:55:32 +02:00

1478 lines
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/*
* Low-level ALSA driver for the ENSONIQ SoundScape PnP
* Copyright (c) by Chris Rankin
*
* This driver was written in part using information obtained from
* the OSS/Free SoundScape driver, written by Hannu Savolainen.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/pnp.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/hwdep.h>
#include <sound/cs4231.h>
#include <sound/mpu401.h>
#include <sound/initval.h>
#include <sound/sscape_ioctl.h>
MODULE_AUTHOR("Chris Rankin");
MODULE_DESCRIPTION("ENSONIQ SoundScape PnP driver");
MODULE_LICENSE("GPL");
static int index[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IDX;
static char* id[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_STR;
static long port[SNDRV_CARDS] __devinitdata = { [0 ... (SNDRV_CARDS-1)] = SNDRV_AUTO_PORT };
static int irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ;
static int mpu_irq[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_IRQ;
static int dma[SNDRV_CARDS] __devinitdata = SNDRV_DEFAULT_DMA;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "Description for SoundScape card");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
module_param_array(mpu_irq, int, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
module_param_array(dma, int, NULL, 0444);
MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
static struct platform_device *platform_devices[SNDRV_CARDS];
#ifdef CONFIG_PNP
static int pnp_registered;
static struct pnp_card_device_id sscape_pnpids[] = {
{ .id = "ENS3081", .devs = { { "ENS0000" } } },
{ .id = "" } /* end */
};
MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
#endif
#define MPU401_IO(i) ((i) + 0)
#define MIDI_DATA_IO(i) ((i) + 0)
#define MIDI_CTRL_IO(i) ((i) + 1)
#define HOST_CTRL_IO(i) ((i) + 2)
#define HOST_DATA_IO(i) ((i) + 3)
#define ODIE_ADDR_IO(i) ((i) + 4)
#define ODIE_DATA_IO(i) ((i) + 5)
#define CODEC_IO(i) ((i) + 8)
#define IC_ODIE 1
#define IC_OPUS 2
#define RX_READY 0x01
#define TX_READY 0x02
#define CMD_ACK 0x80
#define CMD_SET_MIDI_VOL 0x84
#define CMD_GET_MIDI_VOL 0x85
#define CMD_XXX_MIDI_VOL 0x86
#define CMD_SET_EXTMIDI 0x8a
#define CMD_GET_EXTMIDI 0x8b
#define CMD_SET_MT32 0x8c
#define CMD_GET_MT32 0x8d
enum GA_REG {
GA_INTSTAT_REG = 0,
GA_INTENA_REG,
GA_DMAA_REG,
GA_DMAB_REG,
GA_INTCFG_REG,
GA_DMACFG_REG,
GA_CDCFG_REG,
GA_SMCFGA_REG,
GA_SMCFGB_REG,
GA_HMCTL_REG
};
#define DMA_8BIT 0x80
#define AD1845_FREQ_SEL_MSB 0x16
#define AD1845_FREQ_SEL_LSB 0x17
struct soundscape {
spinlock_t lock;
unsigned io_base;
int codec_type;
int ic_type;
struct resource *io_res;
struct snd_cs4231 *chip;
struct snd_mpu401 *mpu;
struct snd_hwdep *hw;
/*
* The MIDI device won't work until we've loaded
* its firmware via a hardware-dependent device IOCTL
*/
spinlock_t fwlock;
int hw_in_use;
unsigned long midi_usage;
unsigned char midi_vol;
};
#define INVALID_IRQ ((unsigned)-1)
static inline struct soundscape *get_card_soundscape(struct snd_card *c)
{
return (struct soundscape *) (c->private_data);
}
static inline struct soundscape *get_mpu401_soundscape(struct snd_mpu401 * mpu)
{
return (struct soundscape *) (mpu->private_data);
}
static inline struct soundscape *get_hwdep_soundscape(struct snd_hwdep * hw)
{
return (struct soundscape *) (hw->private_data);
}
/*
* Allocates some kernel memory that we can use for DMA.
* I think this means that the memory has to map to
* contiguous pages of physical memory.
*/
static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf, unsigned long size)
{
if (buf) {
if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
size, buf) < 0) {
snd_printk(KERN_ERR "sscape: Failed to allocate %lu bytes for DMA\n", size);
return NULL;
}
}
return buf;
}
/*
* Release the DMA-able kernel memory ...
*/
static void free_dmabuf(struct snd_dma_buffer *buf)
{
if (buf && buf->area)
snd_dma_free_pages(buf);
}
/*
* This function writes to the SoundScape's control registers,
* but doesn't do any locking. It's up to the caller to do that.
* This is why this function is "unsafe" ...
*/
static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg, unsigned char val)
{
outb(reg, ODIE_ADDR_IO(io_base));
outb(val, ODIE_DATA_IO(io_base));
}
/*
* Write to the SoundScape's control registers, and do the
* necessary locking ...
*/
static void sscape_write(struct soundscape *s, enum GA_REG reg, unsigned char val)
{
unsigned long flags;
spin_lock_irqsave(&s->lock, flags);
sscape_write_unsafe(s->io_base, reg, val);
spin_unlock_irqrestore(&s->lock, flags);
}
/*
* Read from the SoundScape's control registers, but leave any
* locking to the caller. This is why the function is "unsafe" ...
*/
static inline unsigned char sscape_read_unsafe(unsigned io_base, enum GA_REG reg)
{
outb(reg, ODIE_ADDR_IO(io_base));
return inb(ODIE_DATA_IO(io_base));
}
/*
* Puts the SoundScape into "host" mode, as compared to "MIDI" mode
*/
static inline void set_host_mode_unsafe(unsigned io_base)
{
outb(0x0, HOST_CTRL_IO(io_base));
}
/*
* Puts the SoundScape into "MIDI" mode, as compared to "host" mode
*/
static inline void set_midi_mode_unsafe(unsigned io_base)
{
outb(0x3, HOST_CTRL_IO(io_base));
}
/*
* Read the SoundScape's host-mode control register, but leave
* any locking issues to the caller ...
*/
static inline int host_read_unsafe(unsigned io_base)
{
int data = -1;
if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0) {
data = inb(HOST_DATA_IO(io_base));
}
return data;
}
/*
* Read the SoundScape's host-mode control register, performing
* a limited amount of busy-waiting if the register isn't ready.
* Also leaves all locking-issues to the caller ...
*/
static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
{
int data;
while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
udelay(100);
--timeout;
} /* while */
return data;
}
/*
* Write to the SoundScape's host-mode control registers, but
* leave any locking issues to the caller ...
*/
static inline int host_write_unsafe(unsigned io_base, unsigned char data)
{
if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
outb(data, HOST_DATA_IO(io_base));
return 1;
}
return 0;
}
/*
* Write to the SoundScape's host-mode control registers, performing
* a limited amount of busy-waiting if the register isn't ready.
* Also leaves all locking-issues to the caller ...
*/
static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
unsigned timeout)
{
int err;
while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
udelay(100);
--timeout;
} /* while */
return err;
}
/*
* Check that the MIDI subsystem is operational. If it isn't,
* then we will hang the computer if we try to use it ...
*
* NOTE: This check is based upon observation, not documentation.
*/
static inline int verify_mpu401(const struct snd_mpu401 * mpu)
{
return ((inb(MIDI_CTRL_IO(mpu->port)) & 0xc0) == 0x80);
}
/*
* This is apparently the standard way to initailise an MPU-401
*/
static inline void initialise_mpu401(const struct snd_mpu401 * mpu)
{
outb(0, MIDI_DATA_IO(mpu->port));
}
/*
* Tell the SoundScape to activate the AD1845 chip (I think).
* The AD1845 detection fails if we *don't* do this, so I
* think that this is a good idea ...
*/
static inline void activate_ad1845_unsafe(unsigned io_base)
{
sscape_write_unsafe(io_base, GA_HMCTL_REG, (sscape_read_unsafe(io_base, GA_HMCTL_REG) & 0xcf) | 0x10);
sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
}
/*
* Do the necessary ALSA-level cleanup to deallocate our driver ...
*/
static void soundscape_free(struct snd_card *c)
{
register struct soundscape *sscape = get_card_soundscape(c);
release_and_free_resource(sscape->io_res);
free_dma(sscape->chip->dma1);
}
/*
* Tell the SoundScape to begin a DMA tranfer using the given channel.
* All locking issues are left to the caller.
*/
static inline void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
{
sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) | 0x01);
sscape_write_unsafe(io_base, reg, sscape_read_unsafe(io_base, reg) & 0xfe);
}
/*
* Wait for a DMA transfer to complete. This is a "limited busy-wait",
* and all locking issues are left to the caller.
*/
static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg, unsigned timeout)
{
while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
udelay(100);
--timeout;
} /* while */
return (sscape_read_unsafe(io_base, reg) & 0x01);
}
/*
* Wait for the On-Board Processor to return its start-up
* acknowledgement sequence. This wait is too long for
* us to perform "busy-waiting", and so we must sleep.
* This in turn means that we must not be holding any
* spinlocks when we call this function.
*/
static int obp_startup_ack(struct soundscape *s, unsigned timeout)
{
while (timeout != 0) {
unsigned long flags;
unsigned char x;
schedule_timeout_interruptible(1);
spin_lock_irqsave(&s->lock, flags);
x = inb(HOST_DATA_IO(s->io_base));
spin_unlock_irqrestore(&s->lock, flags);
if ((x & 0xfe) == 0xfe)
return 1;
--timeout;
} /* while */
return 0;
}
/*
* Wait for the host to return its start-up acknowledgement
* sequence. This wait is too long for us to perform
* "busy-waiting", and so we must sleep. This in turn means
* that we must not be holding any spinlocks when we call
* this function.
*/
static int host_startup_ack(struct soundscape *s, unsigned timeout)
{
while (timeout != 0) {
unsigned long flags;
unsigned char x;
schedule_timeout_interruptible(1);
spin_lock_irqsave(&s->lock, flags);
x = inb(HOST_DATA_IO(s->io_base));
spin_unlock_irqrestore(&s->lock, flags);
if (x == 0xfe)
return 1;
--timeout;
} /* while */
return 0;
}
/*
* Upload a byte-stream into the SoundScape using DMA channel A.
*/
static int upload_dma_data(struct soundscape *s,
const unsigned char __user *data,
size_t size)
{
unsigned long flags;
struct snd_dma_buffer dma;
int ret;
if (!get_dmabuf(&dma, PAGE_ALIGN(size)))
return -ENOMEM;
spin_lock_irqsave(&s->lock, flags);
/*
* Reset the board ...
*/
sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f);
/*
* Enable the DMA channels and configure them ...
*/
sscape_write_unsafe(s->io_base, GA_DMACFG_REG, 0x50);
sscape_write_unsafe(s->io_base, GA_DMAA_REG, (s->chip->dma1 << 4) | DMA_8BIT);
sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
/*
* Take the board out of reset ...
*/
sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x80);
/*
* Upload the user's data (firmware?) to the SoundScape
* board through the DMA channel ...
*/
while (size != 0) {
unsigned long len;
/*
* Apparently, copying to/from userspace can sleep.
* We are therefore forbidden from holding any
* spinlocks while we copy ...
*/
spin_unlock_irqrestore(&s->lock, flags);
/*
* Remember that the data that we want to DMA
* comes from USERSPACE. We have already verified
* the userspace pointer ...
*/
len = min(size, dma.bytes);
len -= __copy_from_user(dma.area, data, len);
data += len;
size -= len;
/*
* Grab that spinlock again, now that we've
* finished copying!
*/
spin_lock_irqsave(&s->lock, flags);
snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
/*
* Don't forget to release this spinlock we're holding ...
*/
spin_unlock_irqrestore(&s->lock, flags);
snd_printk(KERN_ERR "sscape: DMA upload has timed out\n");
ret = -EAGAIN;
goto _release_dma;
}
} /* while */
set_host_mode_unsafe(s->io_base);
/*
* Boot the board ... (I think)
*/
sscape_write_unsafe(s->io_base, GA_HMCTL_REG, sscape_read_unsafe(s->io_base, GA_HMCTL_REG) | 0x40);
spin_unlock_irqrestore(&s->lock, flags);
/*
* If all has gone well, then the board should acknowledge
* the new upload and tell us that it has rebooted OK. We
* give it 5 seconds (max) ...
*/
ret = 0;
if (!obp_startup_ack(s, 5)) {
snd_printk(KERN_ERR "sscape: No response from on-board processor after upload\n");
ret = -EAGAIN;
} else if (!host_startup_ack(s, 5)) {
snd_printk(KERN_ERR "sscape: SoundScape failed to initialise\n");
ret = -EAGAIN;
}
_release_dma:
/*
* NOTE!!! We are NOT holding any spinlocks at this point !!!
*/
sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_ODIE ? 0x70 : 0x40));
free_dmabuf(&dma);
return ret;
}
/*
* Upload the bootblock(?) into the SoundScape. The only
* purpose of this block of code seems to be to tell
* us which version of the microcode we should be using.
*
* NOTE: The boot-block data resides in USER-SPACE!!!
* However, we have already verified its memory
* addresses by the time we get here.
*/
static int sscape_upload_bootblock(struct soundscape *sscape, struct sscape_bootblock __user *bb)
{
unsigned long flags;
int data = 0;
int ret;
ret = upload_dma_data(sscape, bb->code, sizeof(bb->code));
spin_lock_irqsave(&sscape->lock, flags);
if (ret == 0) {
data = host_read_ctrl_unsafe(sscape->io_base, 100);
}
set_midi_mode_unsafe(sscape->io_base);
spin_unlock_irqrestore(&sscape->lock, flags);
if (ret == 0) {
if (data < 0) {
snd_printk(KERN_ERR "sscape: timeout reading firmware version\n");
ret = -EAGAIN;
}
else if (__copy_to_user(&bb->version, &data, sizeof(bb->version))) {
ret = -EFAULT;
}
}
return ret;
}
/*
* Upload the microcode into the SoundScape. The
* microcode is 64K of data, and if we try to copy
* it into a local variable then we will SMASH THE
* KERNEL'S STACK! We therefore leave it in USER
* SPACE, and save ourselves from copying it at all.
*/
static int sscape_upload_microcode(struct soundscape *sscape,
const struct sscape_microcode __user *mc)
{
unsigned long flags;
char __user *code;
int err;
/*
* We are going to have to copy this data into a special
* DMA-able buffer before we can upload it. We shall therefore
* just check that the data pointer is valid for now.
*
* NOTE: This buffer is 64K long! That's WAY too big to
* copy into a stack-temporary anyway.
*/
if ( get_user(code, &mc->code) ||
!access_ok(VERIFY_READ, code, SSCAPE_MICROCODE_SIZE) )
return -EFAULT;
if ((err = upload_dma_data(sscape, code, SSCAPE_MICROCODE_SIZE)) == 0) {
snd_printk(KERN_INFO "sscape: MIDI firmware loaded\n");
}
spin_lock_irqsave(&sscape->lock, flags);
set_midi_mode_unsafe(sscape->io_base);
spin_unlock_irqrestore(&sscape->lock, flags);
initialise_mpu401(sscape->mpu);
return err;
}
/*
* Hardware-specific device functions, to implement special
* IOCTLs for the SoundScape card. This is how we upload
* the microcode into the card, for example, and so we
* must ensure that no two processes can open this device
* simultaneously, and that we can't open it at all if
* someone is using the MIDI device.
*/
static int sscape_hw_open(struct snd_hwdep * hw, struct file *file)
{
register struct soundscape *sscape = get_hwdep_soundscape(hw);
unsigned long flags;
int err;
spin_lock_irqsave(&sscape->fwlock, flags);
if ((sscape->midi_usage != 0) || sscape->hw_in_use) {
err = -EBUSY;
} else {
sscape->hw_in_use = 1;
err = 0;
}
spin_unlock_irqrestore(&sscape->fwlock, flags);
return err;
}
static int sscape_hw_release(struct snd_hwdep * hw, struct file *file)
{
register struct soundscape *sscape = get_hwdep_soundscape(hw);
unsigned long flags;
spin_lock_irqsave(&sscape->fwlock, flags);
sscape->hw_in_use = 0;
spin_unlock_irqrestore(&sscape->fwlock, flags);
return 0;
}
static int sscape_hw_ioctl(struct snd_hwdep * hw, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct soundscape *sscape = get_hwdep_soundscape(hw);
int err = -EBUSY;
switch (cmd) {
case SND_SSCAPE_LOAD_BOOTB:
{
register struct sscape_bootblock __user *bb = (struct sscape_bootblock __user *) arg;
/*
* We are going to have to copy this data into a special
* DMA-able buffer before we can upload it. We shall therefore
* just check that the data pointer is valid for now ...
*/
if ( !access_ok(VERIFY_READ, bb->code, sizeof(bb->code)) )
return -EFAULT;
/*
* Now check that we can write the firmware version number too...
*/
if ( !access_ok(VERIFY_WRITE, &bb->version, sizeof(bb->version)) )
return -EFAULT;
err = sscape_upload_bootblock(sscape, bb);
}
break;
case SND_SSCAPE_LOAD_MCODE:
{
register const struct sscape_microcode __user *mc = (const struct sscape_microcode __user *) arg;
err = sscape_upload_microcode(sscape, mc);
}
break;
default:
err = -EINVAL;
break;
} /* switch */
return err;
}
/*
* Mixer control for the SoundScape's MIDI device.
*/
static int sscape_midi_info(struct snd_kcontrol *ctl,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 127;
return 0;
}
static int sscape_midi_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct snd_cs4231 *chip = snd_kcontrol_chip(kctl);
struct snd_card *card = chip->card;
register struct soundscape *s = get_card_soundscape(card);
unsigned long flags;
spin_lock_irqsave(&s->lock, flags);
set_host_mode_unsafe(s->io_base);
if (host_write_ctrl_unsafe(s->io_base, CMD_GET_MIDI_VOL, 100)) {
uctl->value.integer.value[0] = host_read_ctrl_unsafe(s->io_base, 100);
}
set_midi_mode_unsafe(s->io_base);
spin_unlock_irqrestore(&s->lock, flags);
return 0;
}
static int sscape_midi_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct snd_cs4231 *chip = snd_kcontrol_chip(kctl);
struct snd_card *card = chip->card;
register struct soundscape *s = get_card_soundscape(card);
unsigned long flags;
int change;
spin_lock_irqsave(&s->lock, flags);
/*
* We need to put the board into HOST mode before we
* can send any volume-changing HOST commands ...
*/
set_host_mode_unsafe(s->io_base);
/*
* To successfully change the MIDI volume setting, you seem to
* have to write a volume command, write the new volume value,
* and then perform another volume-related command. Perhaps the
* first command is an "open" and the second command is a "close"?
*/
if (s->midi_vol == ((unsigned char) uctl->value.integer. value[0] & 127)) {
change = 0;
goto __skip_change;
}
change = (host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
&& host_write_ctrl_unsafe(s->io_base, ((unsigned char) uctl->value.integer. value[0]) & 127, 100)
&& host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100));
__skip_change:
/*
* Take the board out of HOST mode and back into MIDI mode ...
*/
set_midi_mode_unsafe(s->io_base);
spin_unlock_irqrestore(&s->lock, flags);
return change;
}
static struct snd_kcontrol_new midi_mixer_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "MIDI",
.info = sscape_midi_info,
.get = sscape_midi_get,
.put = sscape_midi_put
};
/*
* The SoundScape can use two IRQs from a possible set of four.
* These IRQs are encoded as bit patterns so that they can be
* written to the control registers.
*/
static unsigned __devinit get_irq_config(int irq)
{
static const int valid_irq[] = { 9, 5, 7, 10 };
unsigned cfg;
for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg) {
if (irq == valid_irq[cfg])
return cfg;
} /* for */
return INVALID_IRQ;
}
/*
* Perform certain arcane port-checks to see whether there
* is a SoundScape board lurking behind the given ports.
*/
static int __devinit detect_sscape(struct soundscape *s)
{
unsigned long flags;
unsigned d;
int retval = 0;
spin_lock_irqsave(&s->lock, flags);
/*
* The following code is lifted from the original OSS driver,
* and as I don't have a datasheet I cannot really comment
* on what it is doing...
*/
if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
goto _done;
d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
if ((d & 0x80) != 0)
goto _done;
if (d == 0) {
s->codec_type = 1;
s->ic_type = IC_ODIE;
} else if ((d & 0x60) != 0) {
s->codec_type = 2;
s->ic_type = IC_OPUS;
} else
goto _done;
outb(0xfa, ODIE_ADDR_IO(s->io_base));
if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
goto _done;
outb(0xfe, ODIE_ADDR_IO(s->io_base));
if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
goto _done;
if ((inb(ODIE_DATA_IO(s->io_base)) & 0x9f) != 0x0e)
goto _done;
/*
* SoundScape successfully detected!
*/
retval = 1;
_done:
spin_unlock_irqrestore(&s->lock, flags);
return retval;
}
/*
* ALSA callback function, called when attempting to open the MIDI device.
* Check that the MIDI firmware has been loaded, because we don't want
* to crash the machine. Also check that someone isn't using the hardware
* IOCTL device.
*/
static int mpu401_open(struct snd_mpu401 * mpu)
{
int err;
if (!verify_mpu401(mpu)) {
snd_printk(KERN_ERR "sscape: MIDI disabled, please load firmware\n");
err = -ENODEV;
} else {
register struct soundscape *sscape = get_mpu401_soundscape(mpu);
unsigned long flags;
spin_lock_irqsave(&sscape->fwlock, flags);
if (sscape->hw_in_use || (sscape->midi_usage == ULONG_MAX)) {
err = -EBUSY;
} else {
++(sscape->midi_usage);
err = 0;
}
spin_unlock_irqrestore(&sscape->fwlock, flags);
}
return err;
}
static void mpu401_close(struct snd_mpu401 * mpu)
{
register struct soundscape *sscape = get_mpu401_soundscape(mpu);
unsigned long flags;
spin_lock_irqsave(&sscape->fwlock, flags);
--(sscape->midi_usage);
spin_unlock_irqrestore(&sscape->fwlock, flags);
}
/*
* Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
*/
static int __devinit create_mpu401(struct snd_card *card, int devnum, unsigned long port, int irq)
{
struct soundscape *sscape = get_card_soundscape(card);
struct snd_rawmidi *rawmidi;
int err;
#define MPU401_SHARE_HARDWARE 1
if ((err = snd_mpu401_uart_new(card, devnum,
MPU401_HW_MPU401,
port, MPU401_SHARE_HARDWARE,
irq, SA_INTERRUPT,
&rawmidi)) == 0) {
struct snd_mpu401 *mpu = (struct snd_mpu401 *) rawmidi->private_data;
mpu->open_input = mpu401_open;
mpu->open_output = mpu401_open;
mpu->close_input = mpu401_close;
mpu->close_output = mpu401_close;
mpu->private_data = sscape;
sscape->mpu = mpu;
initialise_mpu401(mpu);
}
return err;
}
/*
* Override for the CS4231 playback format function.
* The AD1845 has much simpler format and rate selection.
*/
static void ad1845_playback_format(struct snd_cs4231 * chip, struct snd_pcm_hw_params *params, unsigned char format)
{
unsigned long flags;
unsigned rate = params_rate(params);
/*
* The AD1845 can't handle sample frequencies
* outside of 4 kHZ to 50 kHZ
*/
if (rate > 50000)
rate = 50000;
else if (rate < 4000)
rate = 4000;
spin_lock_irqsave(&chip->reg_lock, flags);
/*
* Program the AD1845 correctly for the playback stream.
* Note that we do NOT need to toggle the MCE bit because
* the PLAYBACK_ENABLE bit of the Interface Configuration
* register is set.
*
* NOTE: We seem to need to write to the MSB before the LSB
* to get the correct sample frequency.
*/
snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, (format & 0xf0));
snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8));
snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate);
spin_unlock_irqrestore(&chip->reg_lock, flags);
}
/*
* Override for the CS4231 capture format function.
* The AD1845 has much simpler format and rate selection.
*/
static void ad1845_capture_format(struct snd_cs4231 * chip, struct snd_pcm_hw_params *params, unsigned char format)
{
unsigned long flags;
unsigned rate = params_rate(params);
/*
* The AD1845 can't handle sample frequencies
* outside of 4 kHZ to 50 kHZ
*/
if (rate > 50000)
rate = 50000;
else if (rate < 4000)
rate = 4000;
spin_lock_irqsave(&chip->reg_lock, flags);
/*
* Program the AD1845 correctly for the playback stream.
* Note that we do NOT need to toggle the MCE bit because
* the CAPTURE_ENABLE bit of the Interface Configuration
* register is set.
*
* NOTE: We seem to need to write to the MSB before the LSB
* to get the correct sample frequency.
*/
snd_cs4231_out(chip, CS4231_REC_FORMAT, (format & 0xf0));
snd_cs4231_out(chip, AD1845_FREQ_SEL_MSB, (unsigned char) (rate >> 8));
snd_cs4231_out(chip, AD1845_FREQ_SEL_LSB, (unsigned char) rate);
spin_unlock_irqrestore(&chip->reg_lock, flags);
}
/*
* Create an AD1845 PCM subdevice on the SoundScape. The AD1845
* is very much like a CS4231, with a few extra bits. We will
* try to support at least some of the extra bits by overriding
* some of the CS4231 callback.
*/
static int __devinit create_ad1845(struct snd_card *card, unsigned port, int irq, int dma1)
{
register struct soundscape *sscape = get_card_soundscape(card);
struct snd_cs4231 *chip;
int err;
#define CS4231_SHARE_HARDWARE (CS4231_HWSHARE_DMA1 | CS4231_HWSHARE_DMA2)
/*
* The AD1845 PCM device is only half-duplex, and so
* we only give it one DMA channel ...
*/
if ((err = snd_cs4231_create(card,
port, -1, irq, dma1, dma1,
CS4231_HW_DETECT,
CS4231_HWSHARE_DMA1, &chip)) == 0) {
unsigned long flags;
struct snd_pcm *pcm;
#define AD1845_FREQ_SEL_ENABLE 0x08
#define AD1845_PWR_DOWN_CTRL 0x1b
#define AD1845_CRYS_CLOCK_SEL 0x1d
/*
* It turns out that the PLAYBACK_ENABLE bit is set
* by the lowlevel driver ...
*
#define AD1845_IFACE_CONFIG \
(CS4231_AUTOCALIB | CS4231_RECORD_ENABLE | CS4231_PLAYBACK_ENABLE)
snd_cs4231_mce_up(chip);
spin_lock_irqsave(&chip->reg_lock, flags);
snd_cs4231_out(chip, CS4231_IFACE_CTRL, AD1845_IFACE_CONFIG);
spin_unlock_irqrestore(&chip->reg_lock, flags);
snd_cs4231_mce_down(chip);
*/
/*
* The input clock frequency on the SoundScape must
* be 14.31818 MHz, because we must set this register
* to get the playback to sound correct ...
*/
snd_cs4231_mce_up(chip);
spin_lock_irqsave(&chip->reg_lock, flags);
snd_cs4231_out(chip, AD1845_CRYS_CLOCK_SEL, 0x20);
spin_unlock_irqrestore(&chip->reg_lock, flags);
snd_cs4231_mce_down(chip);
/*
* More custom configuration:
* a) select "mode 2", and provide a current drive of 8 mA
* b) enable frequency selection (for capture/playback)
*/
spin_lock_irqsave(&chip->reg_lock, flags);
snd_cs4231_out(chip, CS4231_MISC_INFO, (CS4231_MODE2 | 0x10));
snd_cs4231_out(chip, AD1845_PWR_DOWN_CTRL, snd_cs4231_in(chip, AD1845_PWR_DOWN_CTRL) | AD1845_FREQ_SEL_ENABLE);
spin_unlock_irqrestore(&chip->reg_lock, flags);
if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0) {
snd_printk(KERN_ERR "sscape: No PCM device for AD1845 chip\n");
goto _error;
}
if ((err = snd_cs4231_mixer(chip)) < 0) {
snd_printk(KERN_ERR "sscape: No mixer device for AD1845 chip\n");
goto _error;
}
if ((err = snd_ctl_add(card, snd_ctl_new1(&midi_mixer_ctl, chip))) < 0) {
snd_printk(KERN_ERR "sscape: Could not create MIDI mixer control\n");
goto _error;
}
strcpy(card->driver, "SoundScape");
strcpy(card->shortname, pcm->name);
snprintf(card->longname, sizeof(card->longname),
"%s at 0x%lx, IRQ %d, DMA %d\n",
pcm->name, chip->port, chip->irq, chip->dma1);
chip->set_playback_format = ad1845_playback_format;
chip->set_capture_format = ad1845_capture_format;
sscape->chip = chip;
}
_error:
return err;
}
/*
* Create an ALSA soundcard entry for the SoundScape, using
* the given list of port, IRQ and DMA resources.
*/
static int __devinit create_sscape(int dev, struct snd_card **rcardp)
{
struct snd_card *card;
register struct soundscape *sscape;
register unsigned dma_cfg;
unsigned irq_cfg;
unsigned mpu_irq_cfg;
unsigned xport;
struct resource *io_res;
unsigned long flags;
int err;
/*
* Check that the user didn't pass us garbage data ...
*/
irq_cfg = get_irq_config(irq[dev]);
if (irq_cfg == INVALID_IRQ) {
snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", irq[dev]);
return -ENXIO;
}
mpu_irq_cfg = get_irq_config(mpu_irq[dev]);
if (mpu_irq_cfg == INVALID_IRQ) {
printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
return -ENXIO;
}
xport = port[dev];
/*
* Grab IO ports that we will need to probe so that we
* can detect and control this hardware ...
*/
if ((io_res = request_region(xport, 8, "SoundScape")) == NULL) {
snd_printk(KERN_ERR "sscape: can't grab port 0x%x\n", xport);
return -EBUSY;
}
/*
* Grab both DMA channels (OK, only one for now) ...
*/
if ((err = request_dma(dma[dev], "SoundScape")) < 0) {
snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", dma[dev]);
goto _release_region;
}
/*
* Create a new ALSA sound card entry, in anticipation
* of detecting our hardware ...
*/
if ((card = snd_card_new(index[dev], id[dev], THIS_MODULE,
sizeof(struct soundscape))) == NULL) {
err = -ENOMEM;
goto _release_dma;
}
sscape = get_card_soundscape(card);
spin_lock_init(&sscape->lock);
spin_lock_init(&sscape->fwlock);
sscape->io_res = io_res;
sscape->io_base = xport;
if (!detect_sscape(sscape)) {
printk(KERN_ERR "sscape: hardware not detected at 0x%x\n", sscape->io_base);
err = -ENODEV;
goto _release_card;
}
printk(KERN_INFO "sscape: hardware detected at 0x%x, using IRQ %d, DMA %d\n",
sscape->io_base, irq[dev], dma[dev]);
/*
* Now create the hardware-specific device so that we can
* load the microcode into the on-board processor.
* We cannot use the MPU-401 MIDI system until this firmware
* has been loaded into the card.
*/
if ((err = snd_hwdep_new(card, "MC68EC000", 0, &(sscape->hw))) < 0) {
printk(KERN_ERR "sscape: Failed to create firmware device\n");
goto _release_card;
}
strlcpy(sscape->hw->name, "SoundScape M68K", sizeof(sscape->hw->name));
sscape->hw->name[sizeof(sscape->hw->name) - 1] = '\0';
sscape->hw->iface = SNDRV_HWDEP_IFACE_SSCAPE;
sscape->hw->ops.open = sscape_hw_open;
sscape->hw->ops.release = sscape_hw_release;
sscape->hw->ops.ioctl = sscape_hw_ioctl;
sscape->hw->private_data = sscape;
/*
* Tell the on-board devices where their resources are (I think -
* I can't be sure without a datasheet ... So many magic values!)
*/
spin_lock_irqsave(&sscape->lock, flags);
activate_ad1845_unsafe(sscape->io_base);
sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x00); /* disable */
sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
/*
* Enable and configure the DMA channels ...
*/
sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
dma_cfg = (sscape->ic_type == IC_ODIE ? 0x70 : 0x40);
sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
sscape_write_unsafe(sscape->io_base,
GA_INTCFG_REG, 0xf0 | (mpu_irq_cfg << 2) | mpu_irq_cfg);
sscape_write_unsafe(sscape->io_base,
GA_CDCFG_REG, 0x09 | DMA_8BIT | (dma[dev] << 4) | (irq_cfg << 1));
spin_unlock_irqrestore(&sscape->lock, flags);
/*
* We have now enabled the codec chip, and so we should
* detect the AD1845 device ...
*/
if ((err = create_ad1845(card, CODEC_IO(xport), irq[dev], dma[dev])) < 0) {
printk(KERN_ERR "sscape: No AD1845 device at 0x%x, IRQ %d\n",
CODEC_IO(xport), irq[dev]);
goto _release_card;
}
#define MIDI_DEVNUM 0
if ((err = create_mpu401(card, MIDI_DEVNUM, MPU401_IO(xport), mpu_irq[dev])) < 0) {
printk(KERN_ERR "sscape: Failed to create MPU-401 device at 0x%x\n",
MPU401_IO(xport));
goto _release_card;
}
/*
* Enable the master IRQ ...
*/
sscape_write(sscape, GA_INTENA_REG, 0x80);
/*
* Initialize mixer
*/
sscape->midi_vol = 0;
host_write_ctrl_unsafe(sscape->io_base, CMD_SET_MIDI_VOL, 100);
host_write_ctrl_unsafe(sscape->io_base, 0, 100);
host_write_ctrl_unsafe(sscape->io_base, CMD_XXX_MIDI_VOL, 100);
/*
* Now that we have successfully created this sound card,
* it is safe to store the pointer.
* NOTE: we only register the sound card's "destructor"
* function now that our "constructor" has completed.
*/
card->private_free = soundscape_free;
*rcardp = card;
return 0;
_release_card:
snd_card_free(card);
_release_dma:
free_dma(dma[dev]);
_release_region:
release_and_free_resource(io_res);
return err;
}
static int __devinit snd_sscape_probe(struct platform_device *pdev)
{
int dev = pdev->id;
struct snd_card *card;
int ret;
dma[dev] &= 0x03;
ret = create_sscape(dev, &card);
if (ret < 0)
return ret;
snd_card_set_dev(card, &pdev->dev);
if ((ret = snd_card_register(card)) < 0) {
printk(KERN_ERR "sscape: Failed to register sound card\n");
return ret;
}
platform_set_drvdata(pdev, card);
return 0;
}
static int __devexit snd_sscape_remove(struct platform_device *devptr)
{
snd_card_free(platform_get_drvdata(devptr));
platform_set_drvdata(devptr, NULL);
return 0;
}
#define SSCAPE_DRIVER "snd_sscape"
static struct platform_driver snd_sscape_driver = {
.probe = snd_sscape_probe,
.remove = __devexit_p(snd_sscape_remove),
/* FIXME: suspend/resume */
.driver = {
.name = SSCAPE_DRIVER
},
};
#ifdef CONFIG_PNP
static inline int __devinit get_next_autoindex(int i)
{
while (i < SNDRV_CARDS && port[i] != SNDRV_AUTO_PORT)
++i;
return i;
}
static int __devinit sscape_pnp_detect(struct pnp_card_link *pcard,
const struct pnp_card_device_id *pid)
{
static int idx = 0;
struct pnp_dev *dev;
struct snd_card *card;
int ret;
/*
* Allow this function to fail *quietly* if all the ISA PnP
* devices were configured using module parameters instead.
*/
if ((idx = get_next_autoindex(idx)) >= SNDRV_CARDS)
return -ENOSPC;
/*
* We have found a candidate ISA PnP card. Now we
* have to check that it has the devices that we
* expect it to have.
*
* We will NOT try and autoconfigure all of the resources
* needed and then activate the card as we are assuming that
* has already been done at boot-time using /proc/isapnp.
* We shall simply try to give each active card the resources
* that it wants. This is a sensible strategy for a modular
* system where unused modules are unloaded regularly.
*
* This strategy is utterly useless if we compile the driver
* into the kernel, of course.
*/
// printk(KERN_INFO "sscape: %s\n", card->name);
/*
* Check that we still have room for another sound card ...
*/
dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
if (! dev)
return -ENODEV;
if (!pnp_is_active(dev)) {
if (pnp_activate_dev(dev) < 0) {
printk(KERN_INFO "sscape: device is inactive\n");
return -EBUSY;
}
}
/*
* Read the correct parameters off the ISA PnP bus ...
*/
port[idx] = pnp_port_start(dev, 0);
irq[idx] = pnp_irq(dev, 0);
mpu_irq[idx] = pnp_irq(dev, 1);
dma[idx] = pnp_dma(dev, 0) & 0x03;
ret = create_sscape(idx, &card);
if (ret < 0)
return ret;
snd_card_set_dev(card, &pcard->card->dev);
if ((ret = snd_card_register(card)) < 0) {
printk(KERN_ERR "sscape: Failed to register sound card\n");
snd_card_free(card);
return ret;
}
pnp_set_card_drvdata(pcard, card);
++idx;
return ret;
}
static void __devexit sscape_pnp_remove(struct pnp_card_link * pcard)
{
snd_card_free(pnp_get_card_drvdata(pcard));
pnp_set_card_drvdata(pcard, NULL);
}
static struct pnp_card_driver sscape_pnpc_driver = {
.flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
.name = "sscape",
.id_table = sscape_pnpids,
.probe = sscape_pnp_detect,
.remove = __devexit_p(sscape_pnp_remove),
};
#endif /* CONFIG_PNP */
static void __init_or_module sscape_unregister_all(void)
{
int i;
#ifdef CONFIG_PNP
if (pnp_registered)
pnp_unregister_card_driver(&sscape_pnpc_driver);
#endif
for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
platform_device_unregister(platform_devices[i]);
platform_driver_unregister(&snd_sscape_driver);
}
static int __init sscape_manual_probe(void)
{
struct platform_device *device;
int i, ret;
ret = platform_driver_register(&snd_sscape_driver);
if (ret < 0)
return ret;
for (i = 0; i < SNDRV_CARDS; ++i) {
/*
* We do NOT probe for ports.
* If we're not given a port number for this
* card then we completely ignore this line
* of parameters.
*/
if (port[i] == SNDRV_AUTO_PORT)
continue;
/*
* Make sure we were given ALL of the other parameters.
*/
if (irq[i] == SNDRV_AUTO_IRQ ||
mpu_irq[i] == SNDRV_AUTO_IRQ ||
dma[i] == SNDRV_AUTO_DMA) {
printk(KERN_INFO
"sscape: insufficient parameters, need IO, IRQ, MPU-IRQ and DMA\n");
sscape_unregister_all();
return -ENXIO;
}
/*
* This cards looks OK ...
*/
device = platform_device_register_simple(SSCAPE_DRIVER,
i, NULL, 0);
if (IS_ERR(device))
continue;
if (!platform_get_drvdata(device)) {
platform_device_unregister(device);
continue;
}
platform_devices[i] = device;
}
return 0;
}
static void sscape_exit(void)
{
sscape_unregister_all();
}
static int __init sscape_init(void)
{
int ret;
/*
* First check whether we were passed any parameters.
* These MUST take precedence over ANY automatic way
* of allocating cards, because the operator is
* S-P-E-L-L-I-N-G it out for us...
*/
ret = sscape_manual_probe();
if (ret < 0)
return ret;
#ifdef CONFIG_PNP
if (pnp_register_card_driver(&sscape_pnpc_driver) == 0)
pnp_registered = 1;
#endif
return 0;
}
module_init(sscape_init);
module_exit(sscape_exit);
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