linux-stable-rt/sound/pci/als300.c

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/*
* als300.c - driver for Avance Logic ALS300/ALS300+ soundcards.
* Copyright (C) 2005 by Ash Willis <ashwillis@programmer.net>
*
* 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
*
* TODO
* 4 channel playback for ALS300+
* gameport
* mpu401
* opl3
*
* NOTES
* The BLOCK_COUNTER registers for the ALS300(+) return a figure related to
* the position in the current period, NOT the whole buffer. It is important
* to know which period we are in so we can calculate the correct pointer.
* This is why we always use 2 periods. We can then use a flip-flop variable
* to keep track of what period we are in.
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/ac97_codec.h>
#include <sound/opl3.h>
/* snd_als300_set_irq_flag */
#define IRQ_DISABLE 0
#define IRQ_ENABLE 1
/* I/O port layout */
#define AC97_ACCESS 0x00
#define AC97_READ 0x04
#define AC97_STATUS 0x06
#define AC97_DATA_AVAIL (1<<6)
#define AC97_BUSY (1<<7)
#define ALS300_IRQ_STATUS 0x07 /* ALS300 Only */
#define IRQ_PLAYBACK (1<<3)
#define IRQ_CAPTURE (1<<2)
#define GCR_DATA 0x08
#define GCR_INDEX 0x0C
#define ALS300P_DRAM_IRQ_STATUS 0x0D /* ALS300+ Only */
#define MPU_IRQ_STATUS 0x0E /* ALS300 Rev. E+, ALS300+ */
#define ALS300P_IRQ_STATUS 0x0F /* ALS300+ Only */
/* General Control Registers */
#define PLAYBACK_START 0x80
#define PLAYBACK_END 0x81
#define PLAYBACK_CONTROL 0x82
#define TRANSFER_START (1<<16)
#define FIFO_PAUSE (1<<17)
#define RECORD_START 0x83
#define RECORD_END 0x84
#define RECORD_CONTROL 0x85
#define DRAM_WRITE_CONTROL 0x8B
#define WRITE_TRANS_START (1<<16)
#define DRAM_MODE_2 (1<<17)
#define MISC_CONTROL 0x8C
#define IRQ_SET_BIT (1<<15)
#define VMUTE_NORMAL (1<<20)
#define MMUTE_NORMAL (1<<21)
#define MUS_VOC_VOL 0x8E
#define PLAYBACK_BLOCK_COUNTER 0x9A
#define RECORD_BLOCK_COUNTER 0x9B
#define DEBUG_CALLS 0
#define DEBUG_PLAY_REC 0
#if DEBUG_CALLS
#define snd_als300_dbgcalls(format, args...) printk(KERN_DEBUG format, ##args)
#define snd_als300_dbgcallenter() printk(KERN_ERR "--> %s\n", __func__)
#define snd_als300_dbgcallleave() printk(KERN_ERR "<-- %s\n", __func__)
#else
#define snd_als300_dbgcalls(format, args...)
#define snd_als300_dbgcallenter()
#define snd_als300_dbgcallleave()
#endif
#if DEBUG_PLAY_REC
#define snd_als300_dbgplay(format, args...) printk(KERN_ERR format, ##args)
#else
#define snd_als300_dbgplay(format, args...)
#endif
enum {DEVICE_ALS300, DEVICE_ALS300_PLUS};
MODULE_AUTHOR("Ash Willis <ashwillis@programmer.net>");
MODULE_DESCRIPTION("Avance Logic ALS300");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS300},{Avance Logic,ALS300+}}");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
struct snd_als300 {
unsigned long port;
spinlock_t reg_lock;
struct snd_card *card;
struct pci_dev *pci;
struct snd_pcm *pcm;
struct snd_pcm_substream *playback_substream;
struct snd_pcm_substream *capture_substream;
struct snd_ac97 *ac97;
struct snd_opl3 *opl3;
struct resource *res_port;
int irq;
int chip_type; /* ALS300 or ALS300+ */
char revision;
};
struct snd_als300_substream_data {
int period_flipflop;
int control_register;
int block_counter_register;
};
static DEFINE_PCI_DEVICE_TABLE(snd_als300_ids) = {
{ 0x4005, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300 },
{ 0x4005, 0x0308, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300_PLUS },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, snd_als300_ids);
static inline u32 snd_als300_gcr_read(unsigned long port, unsigned short reg)
{
outb(reg, port+GCR_INDEX);
return inl(port+GCR_DATA);
}
static inline void snd_als300_gcr_write(unsigned long port,
unsigned short reg, u32 val)
{
outb(reg, port+GCR_INDEX);
outl(val, port+GCR_DATA);
}
/* Enable/Disable Interrupts */
static void snd_als300_set_irq_flag(struct snd_als300 *chip, int cmd)
{
u32 tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
snd_als300_dbgcallenter();
/* boolean XOR check, since old vs. new hardware have
directly reversed bit setting for ENABLE and DISABLE.
ALS300+ acts like newer versions of ALS300 */
if (((chip->revision > 5 || chip->chip_type == DEVICE_ALS300_PLUS) ^
(cmd == IRQ_ENABLE)) == 0)
tmp |= IRQ_SET_BIT;
else
tmp &= ~IRQ_SET_BIT;
snd_als300_gcr_write(chip->port, MISC_CONTROL, tmp);
snd_als300_dbgcallleave();
}
static int snd_als300_free(struct snd_als300 *chip)
{
snd_als300_dbgcallenter();
snd_als300_set_irq_flag(chip, IRQ_DISABLE);
if (chip->irq >= 0)
free_irq(chip->irq, chip);
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip);
snd_als300_dbgcallleave();
return 0;
}
static int snd_als300_dev_free(struct snd_device *device)
{
struct snd_als300 *chip = device->device_data;
return snd_als300_free(chip);
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
static irqreturn_t snd_als300_interrupt(int irq, void *dev_id)
{
u8 status;
struct snd_als300 *chip = dev_id;
struct snd_als300_substream_data *data;
status = inb(chip->port+ALS300_IRQ_STATUS);
if (!status) /* shared IRQ, for different device?? Exit ASAP! */
return IRQ_NONE;
/* ACK everything ASAP */
outb(status, chip->port+ALS300_IRQ_STATUS);
if (status & IRQ_PLAYBACK) {
if (chip->pcm && chip->playback_substream) {
data = chip->playback_substream->runtime->private_data;
data->period_flipflop ^= 1;
snd_pcm_period_elapsed(chip->playback_substream);
snd_als300_dbgplay("IRQ_PLAYBACK\n");
}
}
if (status & IRQ_CAPTURE) {
if (chip->pcm && chip->capture_substream) {
data = chip->capture_substream->runtime->private_data;
data->period_flipflop ^= 1;
snd_pcm_period_elapsed(chip->capture_substream);
snd_als300_dbgplay("IRQ_CAPTURE\n");
}
}
return IRQ_HANDLED;
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
{
u8 general, mpu, dram;
struct snd_als300 *chip = dev_id;
struct snd_als300_substream_data *data;
general = inb(chip->port+ALS300P_IRQ_STATUS);
mpu = inb(chip->port+MPU_IRQ_STATUS);
dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
/* shared IRQ, for different device?? Exit ASAP! */
if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
return IRQ_NONE;
if (general & IRQ_PLAYBACK) {
if (chip->pcm && chip->playback_substream) {
outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
data = chip->playback_substream->runtime->private_data;
data->period_flipflop ^= 1;
snd_pcm_period_elapsed(chip->playback_substream);
snd_als300_dbgplay("IRQ_PLAYBACK\n");
}
}
if (general & IRQ_CAPTURE) {
if (chip->pcm && chip->capture_substream) {
outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
data = chip->capture_substream->runtime->private_data;
data->period_flipflop ^= 1;
snd_pcm_period_elapsed(chip->capture_substream);
snd_als300_dbgplay("IRQ_CAPTURE\n");
}
}
/* FIXME: Ack other interrupt types. Not important right now as
* those other devices aren't enabled. */
return IRQ_HANDLED;
}
static void __devexit snd_als300_remove(struct pci_dev *pci)
{
snd_als300_dbgcallenter();
snd_card_free(pci_get_drvdata(pci));
pci_set_drvdata(pci, NULL);
snd_als300_dbgcallleave();
}
static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
unsigned short reg)
{
int i;
struct snd_als300 *chip = ac97->private_data;
for (i = 0; i < 1000; i++) {
if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
break;
udelay(10);
}
outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
for (i = 0; i < 1000; i++) {
if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
break;
udelay(10);
}
return inw(chip->port+AC97_READ);
}
static void snd_als300_ac97_write(struct snd_ac97 *ac97,
unsigned short reg, unsigned short val)
{
int i;
struct snd_als300 *chip = ac97->private_data;
for (i = 0; i < 1000; i++) {
if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
break;
udelay(10);
}
outl((reg << 24) | val, chip->port+AC97_ACCESS);
}
static int snd_als300_ac97(struct snd_als300 *chip)
{
struct snd_ac97_bus *bus;
struct snd_ac97_template ac97;
int err;
static struct snd_ac97_bus_ops ops = {
.write = snd_als300_ac97_write,
.read = snd_als300_ac97_read,
};
snd_als300_dbgcallenter();
if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
return err;
memset(&ac97, 0, sizeof(ac97));
ac97.private_data = chip;
snd_als300_dbgcallleave();
return snd_ac97_mixer(bus, &ac97, &chip->ac97);
}
/* hardware definition
*
* In AC97 mode, we always use 48k/16bit/stereo.
* Any request to change data type is ignored by
* the card when it is running outside of legacy
* mode.
*/
static struct snd_pcm_hardware snd_als300_playback_hw =
{
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = 64 * 1024,
.period_bytes_min = 64,
.period_bytes_max = 32 * 1024,
.periods_min = 2,
.periods_max = 2,
};
static struct snd_pcm_hardware snd_als300_capture_hw =
{
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = 64 * 1024,
.period_bytes_min = 64,
.period_bytes_max = 32 * 1024,
.periods_min = 2,
.periods_max = 2,
};
static int snd_als300_playback_open(struct snd_pcm_substream *substream)
{
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
GFP_KERNEL);
snd_als300_dbgcallenter();
chip->playback_substream = substream;
runtime->hw = snd_als300_playback_hw;
runtime->private_data = data;
data->control_register = PLAYBACK_CONTROL;
data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
snd_als300_dbgcallleave();
return 0;
}
static int snd_als300_playback_close(struct snd_pcm_substream *substream)
{
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_als300_substream_data *data;
data = substream->runtime->private_data;
snd_als300_dbgcallenter();
kfree(data);
chip->playback_substream = NULL;
snd_pcm_lib_free_pages(substream);
snd_als300_dbgcallleave();
return 0;
}
static int snd_als300_capture_open(struct snd_pcm_substream *substream)
{
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
GFP_KERNEL);
snd_als300_dbgcallenter();
chip->capture_substream = substream;
runtime->hw = snd_als300_capture_hw;
runtime->private_data = data;
data->control_register = RECORD_CONTROL;
data->block_counter_register = RECORD_BLOCK_COUNTER;
snd_als300_dbgcallleave();
return 0;
}
static int snd_als300_capture_close(struct snd_pcm_substream *substream)
{
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_als300_substream_data *data;
data = substream->runtime->private_data;
snd_als300_dbgcallenter();
kfree(data);
chip->capture_substream = NULL;
snd_pcm_lib_free_pages(substream);
snd_als300_dbgcallleave();
return 0;
}
static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
return snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
}
static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
{
u32 tmp;
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
snd_als300_dbgcallenter();
spin_lock_irq(&chip->reg_lock);
tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
tmp &= ~TRANSFER_START;
snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
period_bytes, buffer_bytes);
/* set block size */
tmp &= 0xffff0000;
tmp |= period_bytes - 1;
snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
/* set dma area */
snd_als300_gcr_write(chip->port, PLAYBACK_START,
runtime->dma_addr);
snd_als300_gcr_write(chip->port, PLAYBACK_END,
runtime->dma_addr + buffer_bytes - 1);
spin_unlock_irq(&chip->reg_lock);
snd_als300_dbgcallleave();
return 0;
}
static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
{
u32 tmp;
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
snd_als300_dbgcallenter();
spin_lock_irq(&chip->reg_lock);
tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
tmp &= ~TRANSFER_START;
snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
buffer_bytes);
/* set block size */
tmp &= 0xffff0000;
tmp |= period_bytes - 1;
/* set dma area */
snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
snd_als300_gcr_write(chip->port, RECORD_START,
runtime->dma_addr);
snd_als300_gcr_write(chip->port, RECORD_END,
runtime->dma_addr + buffer_bytes - 1);
spin_unlock_irq(&chip->reg_lock);
snd_als300_dbgcallleave();
return 0;
}
static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
u32 tmp;
struct snd_als300_substream_data *data;
unsigned short reg;
int ret = 0;
data = substream->runtime->private_data;
reg = data->control_register;
snd_als300_dbgcallenter();
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
tmp = snd_als300_gcr_read(chip->port, reg);
data->period_flipflop = 1;
snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
snd_als300_dbgplay("TRIGGER START\n");
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
tmp = snd_als300_gcr_read(chip->port, reg);
snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
snd_als300_dbgplay("TRIGGER STOP\n");
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
tmp = snd_als300_gcr_read(chip->port, reg);
snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
snd_als300_dbgplay("TRIGGER PAUSE\n");
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
tmp = snd_als300_gcr_read(chip->port, reg);
snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
snd_als300_dbgplay("TRIGGER RELEASE\n");
break;
default:
snd_als300_dbgplay("TRIGGER INVALID\n");
ret = -EINVAL;
}
spin_unlock(&chip->reg_lock);
snd_als300_dbgcallleave();
return ret;
}
static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
{
u16 current_ptr;
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_als300_substream_data *data;
unsigned short period_bytes;
data = substream->runtime->private_data;
period_bytes = snd_pcm_lib_period_bytes(substream);
snd_als300_dbgcallenter();
spin_lock(&chip->reg_lock);
current_ptr = (u16) snd_als300_gcr_read(chip->port,
data->block_counter_register) + 4;
spin_unlock(&chip->reg_lock);
if (current_ptr > period_bytes)
current_ptr = 0;
else
current_ptr = period_bytes - current_ptr;
if (data->period_flipflop == 0)
current_ptr += period_bytes;
snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
snd_als300_dbgcallleave();
return bytes_to_frames(substream->runtime, current_ptr);
}
static struct snd_pcm_ops snd_als300_playback_ops = {
.open = snd_als300_playback_open,
.close = snd_als300_playback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_als300_pcm_hw_params,
.hw_free = snd_als300_pcm_hw_free,
.prepare = snd_als300_playback_prepare,
.trigger = snd_als300_trigger,
.pointer = snd_als300_pointer,
};
static struct snd_pcm_ops snd_als300_capture_ops = {
.open = snd_als300_capture_open,
.close = snd_als300_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_als300_pcm_hw_params,
.hw_free = snd_als300_pcm_hw_free,
.prepare = snd_als300_capture_prepare,
.trigger = snd_als300_trigger,
.pointer = snd_als300_pointer,
};
static int __devinit snd_als300_new_pcm(struct snd_als300 *chip)
{
struct snd_pcm *pcm;
int err;
snd_als300_dbgcallenter();
err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
if (err < 0)
return err;
pcm->private_data = chip;
strcpy(pcm->name, "ALS300");
chip->pcm = pcm;
/* set operators */
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
&snd_als300_playback_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
&snd_als300_capture_ops);
/* pre-allocation of buffers */
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
snd_als300_dbgcallleave();
return 0;
}
static void snd_als300_init(struct snd_als300 *chip)
{
unsigned long flags;
u32 tmp;
snd_als300_dbgcallenter();
spin_lock_irqsave(&chip->reg_lock, flags);
chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
& 0x0000000F;
/* Setup DRAM */
tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
(tmp | DRAM_MODE_2)
& ~WRITE_TRANS_START);
/* Enable IRQ output */
snd_als300_set_irq_flag(chip, IRQ_ENABLE);
/* Unmute hardware devices so their outputs get routed to
* the onboard mixer */
tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
snd_als300_gcr_write(chip->port, MISC_CONTROL,
tmp | VMUTE_NORMAL | MMUTE_NORMAL);
/* Reset volumes */
snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
/* Make sure playback transfer is stopped */
tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
tmp & ~TRANSFER_START);
spin_unlock_irqrestore(&chip->reg_lock, flags);
snd_als300_dbgcallleave();
}
static int __devinit snd_als300_create(struct snd_card *card,
struct pci_dev *pci, int chip_type,
struct snd_als300 **rchip)
{
struct snd_als300 *chip;
void *irq_handler;
int err;
static struct snd_device_ops ops = {
.dev_free = snd_als300_dev_free,
};
*rchip = NULL;
snd_als300_dbgcallenter();
if ((err = pci_enable_device(pci)) < 0)
return err;
if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
printk(KERN_ERR "error setting 28bit DMA mask\n");
pci_disable_device(pci);
return -ENXIO;
}
pci_set_master(pci);
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL) {
pci_disable_device(pci);
return -ENOMEM;
}
chip->card = card;
chip->pci = pci;
chip->irq = -1;
chip->chip_type = chip_type;
spin_lock_init(&chip->reg_lock);
if ((err = pci_request_regions(pci, "ALS300")) < 0) {
kfree(chip);
pci_disable_device(pci);
return err;
}
chip->port = pci_resource_start(pci, 0);
if (chip->chip_type == DEVICE_ALS300_PLUS)
irq_handler = snd_als300plus_interrupt;
else
irq_handler = snd_als300_interrupt;
if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
card->shortname, chip)) {
snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
snd_als300_free(chip);
return -EBUSY;
}
chip->irq = pci->irq;
snd_als300_init(chip);
err = snd_als300_ac97(chip);
if (err < 0) {
snd_printk(KERN_WARNING "Could not create ac97\n");
snd_als300_free(chip);
return err;
}
if ((err = snd_als300_new_pcm(chip)) < 0) {
snd_printk(KERN_WARNING "Could not create PCM\n");
snd_als300_free(chip);
return err;
}
if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
chip, &ops)) < 0) {
snd_als300_free(chip);
return err;
}
snd_card_set_dev(card, &pci->dev);
*rchip = chip;
snd_als300_dbgcallleave();
return 0;
}
#ifdef CONFIG_PM
static int snd_als300_suspend(struct pci_dev *pci, pm_message_t state)
{
struct snd_card *card = pci_get_drvdata(pci);
struct snd_als300 *chip = card->private_data;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
snd_pcm_suspend_all(chip->pcm);
snd_ac97_suspend(chip->ac97);
pci_disable_device(pci);
pci_save_state(pci);
pci_set_power_state(pci, pci_choose_state(pci, state));
return 0;
}
static int snd_als300_resume(struct pci_dev *pci)
{
struct snd_card *card = pci_get_drvdata(pci);
struct snd_als300 *chip = card->private_data;
pci_set_power_state(pci, PCI_D0);
pci_restore_state(pci);
if (pci_enable_device(pci) < 0) {
printk(KERN_ERR "als300: pci_enable_device failed, "
"disabling device\n");
snd_card_disconnect(card);
return -EIO;
}
pci_set_master(pci);
snd_als300_init(chip);
snd_ac97_resume(chip->ac97);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
#endif
static int __devinit snd_als300_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
static int dev;
struct snd_card *card;
struct snd_als300 *chip;
int err, chip_type;
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev]) {
dev++;
return -ENOENT;
}
err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
if (err < 0)
return err;
chip_type = pci_id->driver_data;
if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
snd_card_free(card);
return err;
}
card->private_data = chip;
strcpy(card->driver, "ALS300");
if (chip->chip_type == DEVICE_ALS300_PLUS)
/* don't know much about ALS300+ yet
* print revision number for now */
sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
else
sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
chip->revision - 1);
sprintf(card->longname, "%s at 0x%lx irq %i",
card->shortname, chip->port, chip->irq);
if ((err = snd_card_register(card)) < 0) {
snd_card_free(card);
return err;
}
pci_set_drvdata(pci, card);
dev++;
return 0;
}
static struct pci_driver driver = {
.name = "ALS300",
.id_table = snd_als300_ids,
.probe = snd_als300_probe,
.remove = __devexit_p(snd_als300_remove),
#ifdef CONFIG_PM
.suspend = snd_als300_suspend,
.resume = snd_als300_resume,
#endif
};
static int __init alsa_card_als300_init(void)
{
return pci_register_driver(&driver);
}
static void __exit alsa_card_als300_exit(void)
{
pci_unregister_driver(&driver);
}
module_init(alsa_card_als300_init)
module_exit(alsa_card_als300_exit)