+++ /dev/null
-/*
- * BRIEF MODULE DESCRIPTION
- * Driver for AMD Au1000 MIPS Processor, AC'97 Sound Port
- *
- * Copyright 2004 Cooper Street Innovations Inc.
- * Author: Charles Eidsness <charles@cooper-street.com>
- *
- * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * History:
- *
- * 2004-09-09 Charles Eidsness -- Original verion -- based on
- * sa11xx-uda1341.c ALSA driver and the
- * au1000.c OSS driver.
- * 2004-09-09 Matt Porter -- Added support for ALSA 1.0.6
- *
- */
-
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <sound/core.h>
-#include <sound/initval.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/ac97_codec.h>
-#include <asm/mach-au1x00/au1000.h>
-#include <asm/mach-au1x00/au1000_dma.h>
-
-MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>");
-MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver");
-MODULE_LICENSE("GPL");
-MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}");
-
-#define PLAYBACK 0
-#define CAPTURE 1
-#define AC97_SLOT_3 0x01
-#define AC97_SLOT_4 0x02
-#define AC97_SLOT_6 0x08
-#define AC97_CMD_IRQ 31
-#define READ 0
-#define WRITE 1
-#define READ_WAIT 2
-#define RW_DONE 3
-
-struct au1000_period
-{
- u32 start;
- u32 relative_end; /*realtive to start of buffer*/
- struct au1000_period * next;
-};
-
-/*Au1000 AC97 Port Control Reisters*/
-struct au1000_ac97_reg {
- u32 volatile config;
- u32 volatile status;
- u32 volatile data;
- u32 volatile cmd;
- u32 volatile cntrl;
-};
-
-struct audio_stream {
- struct snd_pcm_substream *substream;
- int dma;
- spinlock_t dma_lock;
- struct au1000_period * buffer;
- unsigned int period_size;
- unsigned int periods;
-};
-
-struct snd_au1000 {
- struct snd_card *card;
- struct au1000_ac97_reg volatile *ac97_ioport;
-
- struct resource *ac97_res_port;
- spinlock_t ac97_lock;
- struct snd_ac97 *ac97;
-
- struct snd_pcm *pcm;
- struct audio_stream *stream[2]; /* playback & capture */
- int dmaid[2]; /* tx(0)/rx(1) DMA ids */
-};
-
-/*--------------------------- Local Functions --------------------------------*/
-static void
-au1000_set_ac97_xmit_slots(struct snd_au1000 *au1000, long xmit_slots)
-{
- u32 volatile ac97_config;
-
- spin_lock(&au1000->ac97_lock);
- ac97_config = au1000->ac97_ioport->config;
- ac97_config = ac97_config & ~AC97C_XMIT_SLOTS_MASK;
- ac97_config |= (xmit_slots << AC97C_XMIT_SLOTS_BIT);
- au1000->ac97_ioport->config = ac97_config;
- spin_unlock(&au1000->ac97_lock);
-}
-
-static void
-au1000_set_ac97_recv_slots(struct snd_au1000 *au1000, long recv_slots)
-{
- u32 volatile ac97_config;
-
- spin_lock(&au1000->ac97_lock);
- ac97_config = au1000->ac97_ioport->config;
- ac97_config = ac97_config & ~AC97C_RECV_SLOTS_MASK;
- ac97_config |= (recv_slots << AC97C_RECV_SLOTS_BIT);
- au1000->ac97_ioport->config = ac97_config;
- spin_unlock(&au1000->ac97_lock);
-}
-
-
-static void
-au1000_release_dma_link(struct audio_stream *stream)
-{
- struct au1000_period * pointer;
- struct au1000_period * pointer_next;
-
- stream->period_size = 0;
- stream->periods = 0;
- pointer = stream->buffer;
- if (! pointer)
- return;
- do {
- pointer_next = pointer->next;
- kfree(pointer);
- pointer = pointer_next;
- } while (pointer != stream->buffer);
- stream->buffer = NULL;
-}
-
-static int
-au1000_setup_dma_link(struct audio_stream *stream, unsigned int period_bytes,
- unsigned int periods)
-{
- struct snd_pcm_substream *substream = stream->substream;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct au1000_period *pointer;
- unsigned long dma_start;
- int i;
-
- dma_start = virt_to_phys(runtime->dma_area);
-
- if (stream->period_size == period_bytes &&
- stream->periods == periods)
- return 0; /* not changed */
-
- au1000_release_dma_link(stream);
-
- stream->period_size = period_bytes;
- stream->periods = periods;
-
- stream->buffer = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
- if (! stream->buffer)
- return -ENOMEM;
- pointer = stream->buffer;
- for (i = 0; i < periods; i++) {
- pointer->start = (u32)(dma_start + (i * period_bytes));
- pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1);
- if (i < periods - 1) {
- pointer->next = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
- if (! pointer->next) {
- au1000_release_dma_link(stream);
- return -ENOMEM;
- }
- pointer = pointer->next;
- }
- }
- pointer->next = stream->buffer;
- return 0;
-}
-
-static void
-au1000_dma_stop(struct audio_stream *stream)
-{
- if (snd_BUG_ON(!stream->buffer))
- return;
- disable_dma(stream->dma);
-}
-
-static void
-au1000_dma_start(struct audio_stream *stream)
-{
- if (snd_BUG_ON(!stream->buffer))
- return;
-
- init_dma(stream->dma);
- if (get_dma_active_buffer(stream->dma) == 0) {
- clear_dma_done0(stream->dma);
- set_dma_addr0(stream->dma, stream->buffer->start);
- set_dma_count0(stream->dma, stream->period_size >> 1);
- set_dma_addr1(stream->dma, stream->buffer->next->start);
- set_dma_count1(stream->dma, stream->period_size >> 1);
- } else {
- clear_dma_done1(stream->dma);
- set_dma_addr1(stream->dma, stream->buffer->start);
- set_dma_count1(stream->dma, stream->period_size >> 1);
- set_dma_addr0(stream->dma, stream->buffer->next->start);
- set_dma_count0(stream->dma, stream->period_size >> 1);
- }
- enable_dma_buffers(stream->dma);
- start_dma(stream->dma);
-}
-
-static irqreturn_t
-au1000_dma_interrupt(int irq, void *dev_id)
-{
- struct audio_stream *stream = (struct audio_stream *) dev_id;
- struct snd_pcm_substream *substream = stream->substream;
-
- spin_lock(&stream->dma_lock);
- switch (get_dma_buffer_done(stream->dma)) {
- case DMA_D0:
- stream->buffer = stream->buffer->next;
- clear_dma_done0(stream->dma);
- set_dma_addr0(stream->dma, stream->buffer->next->start);
- set_dma_count0(stream->dma, stream->period_size >> 1);
- enable_dma_buffer0(stream->dma);
- break;
- case DMA_D1:
- stream->buffer = stream->buffer->next;
- clear_dma_done1(stream->dma);
- set_dma_addr1(stream->dma, stream->buffer->next->start);
- set_dma_count1(stream->dma, stream->period_size >> 1);
- enable_dma_buffer1(stream->dma);
- break;
- case (DMA_D0 | DMA_D1):
- printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma);
- au1000_dma_stop(stream);
- au1000_dma_start(stream);
- break;
- case (~DMA_D0 & ~DMA_D1):
- printk(KERN_ERR "DMA %d empty irq.\n",stream->dma);
- }
- spin_unlock(&stream->dma_lock);
- snd_pcm_period_elapsed(substream);
- return IRQ_HANDLED;
-}
-
-/*-------------------------- PCM Audio Streams -------------------------------*/
-
-static unsigned int rates[] = {8000, 11025, 16000, 22050};
-static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
- .count = ARRAY_SIZE(rates),
- .list = rates,
- .mask = 0,
-};
-
-static struct snd_pcm_hardware snd_au1000_hw =
-{
- .info = (SNDRV_PCM_INFO_INTERLEAVED | \
- SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |
- SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050),
- .rate_min = 8000,
- .rate_max = 22050,
- .channels_min = 1,
- .channels_max = 2,
- .buffer_bytes_max = 128*1024,
- .period_bytes_min = 32,
- .period_bytes_max = 16*1024,
- .periods_min = 8,
- .periods_max = 255,
- .fifo_size = 16,
-};
-
-static int
-snd_au1000_playback_open(struct snd_pcm_substream *substream)
-{
- struct snd_au1000 *au1000 = substream->pcm->private_data;
-
- au1000->stream[PLAYBACK]->substream = substream;
- au1000->stream[PLAYBACK]->buffer = NULL;
- substream->private_data = au1000->stream[PLAYBACK];
- substream->runtime->hw = snd_au1000_hw;
- return (snd_pcm_hw_constraint_list(substream->runtime, 0,
- SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
-}
-
-static int
-snd_au1000_capture_open(struct snd_pcm_substream *substream)
-{
- struct snd_au1000 *au1000 = substream->pcm->private_data;
-
- au1000->stream[CAPTURE]->substream = substream;
- au1000->stream[CAPTURE]->buffer = NULL;
- substream->private_data = au1000->stream[CAPTURE];
- substream->runtime->hw = snd_au1000_hw;
- return (snd_pcm_hw_constraint_list(substream->runtime, 0,
- SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
-}
-
-static int
-snd_au1000_playback_close(struct snd_pcm_substream *substream)
-{
- struct snd_au1000 *au1000 = substream->pcm->private_data;
-
- au1000->stream[PLAYBACK]->substream = NULL;
- return 0;
-}
-
-static int
-snd_au1000_capture_close(struct snd_pcm_substream *substream)
-{
- struct snd_au1000 *au1000 = substream->pcm->private_data;
-
- au1000->stream[CAPTURE]->substream = NULL;
- return 0;
-}
-
-static int
-snd_au1000_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- struct audio_stream *stream = substream->private_data;
- int err;
-
- err = snd_pcm_lib_malloc_pages(substream,
- params_buffer_bytes(hw_params));
- if (err < 0)
- return err;
- return au1000_setup_dma_link(stream,
- params_period_bytes(hw_params),
- params_periods(hw_params));
-}
-
-static int
-snd_au1000_hw_free(struct snd_pcm_substream *substream)
-{
- struct audio_stream *stream = substream->private_data;
- au1000_release_dma_link(stream);
- return snd_pcm_lib_free_pages(substream);
-}
-
-static int
-snd_au1000_playback_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_au1000 *au1000 = substream->pcm->private_data;
- struct snd_pcm_runtime *runtime = substream->runtime;
-
- if (runtime->channels == 1)
- au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4);
- else
- au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
- snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
- return 0;
-}
-
-static int
-snd_au1000_capture_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_au1000 *au1000 = substream->pcm->private_data;
- struct snd_pcm_runtime *runtime = substream->runtime;
-
- if (runtime->channels == 1)
- au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4);
- else
- au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
- snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
- return 0;
-}
-
-static int
-snd_au1000_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct audio_stream *stream = substream->private_data;
- int err = 0;
-
- spin_lock(&stream->dma_lock);
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- au1000_dma_start(stream);
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- au1000_dma_stop(stream);
- break;
- default:
- err = -EINVAL;
- break;
- }
- spin_unlock(&stream->dma_lock);
- return err;
-}
-
-static snd_pcm_uframes_t
-snd_au1000_pointer(struct snd_pcm_substream *substream)
-{
- struct audio_stream *stream = substream->private_data;
- struct snd_pcm_runtime *runtime = substream->runtime;
- long location;
-
- spin_lock(&stream->dma_lock);
- location = get_dma_residue(stream->dma);
- spin_unlock(&stream->dma_lock);
- location = stream->buffer->relative_end - location;
- if (location == -1)
- location = 0;
- return bytes_to_frames(runtime,location);
-}
-
-static struct snd_pcm_ops snd_card_au1000_playback_ops = {
- .open = snd_au1000_playback_open,
- .close = snd_au1000_playback_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = snd_au1000_hw_params,
- .hw_free = snd_au1000_hw_free,
- .prepare = snd_au1000_playback_prepare,
- .trigger = snd_au1000_trigger,
- .pointer = snd_au1000_pointer,
-};
-
-static struct snd_pcm_ops snd_card_au1000_capture_ops = {
- .open = snd_au1000_capture_open,
- .close = snd_au1000_capture_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = snd_au1000_hw_params,
- .hw_free = snd_au1000_hw_free,
- .prepare = snd_au1000_capture_prepare,
- .trigger = snd_au1000_trigger,
- .pointer = snd_au1000_pointer,
-};
-
-static int
-snd_au1000_pcm_new(struct snd_au1000 *au1000)
-{
- struct snd_pcm *pcm;
- int err;
- unsigned long flags;
-
- if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0)
- return err;
-
- snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
- snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024);
-
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
- &snd_card_au1000_playback_ops);
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
- &snd_card_au1000_capture_ops);
-
- pcm->private_data = au1000;
- pcm->info_flags = 0;
- strcpy(pcm->name, "Au1000 AC97 PCM");
-
- spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock);
- spin_lock_init(&au1000->stream[CAPTURE]->dma_lock);
-
- flags = claim_dma_lock();
- au1000->stream[PLAYBACK]->dma = request_au1000_dma(au1000->dmaid[0],
- "AC97 TX", au1000_dma_interrupt, 0,
- au1000->stream[PLAYBACK]);
- if (au1000->stream[PLAYBACK]->dma < 0) {
- release_dma_lock(flags);
- return -EBUSY;
- }
- au1000->stream[CAPTURE]->dma = request_au1000_dma(au1000->dmaid[1],
- "AC97 RX", au1000_dma_interrupt, 0,
- au1000->stream[CAPTURE]);
- if (au1000->stream[CAPTURE]->dma < 0){
- release_dma_lock(flags);
- return -EBUSY;
- }
- /* enable DMA coherency in read/write DMA channels */
- set_dma_mode(au1000->stream[PLAYBACK]->dma,
- get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC);
- set_dma_mode(au1000->stream[CAPTURE]->dma,
- get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC);
- release_dma_lock(flags);
- au1000->pcm = pcm;
- return 0;
-}
-
-
-/*-------------------------- AC97 CODEC Control ------------------------------*/
-
-static unsigned short
-snd_au1000_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
-{
- struct snd_au1000 *au1000 = ac97->private_data;
- u32 volatile cmd;
- u16 volatile data;
- int i;
-
- spin_lock(&au1000->ac97_lock);
-/* would rather use the interrupt than this polling but it works and I can't
-get the interrupt driven case to work efficiently */
- for (i = 0; i < 0x5000; i++)
- if (!(au1000->ac97_ioport->status & AC97C_CP))
- break;
- if (i == 0x5000)
- printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n");
-
- cmd = (u32) reg & AC97C_INDEX_MASK;
- cmd |= AC97C_READ;
- au1000->ac97_ioport->cmd = cmd;
-
- /* now wait for the data */
- for (i = 0; i < 0x5000; i++)
- if (!(au1000->ac97_ioport->status & AC97C_CP))
- break;
- if (i == 0x5000) {
- printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n");
- spin_unlock(&au1000->ac97_lock);
- return 0;
- }
-
- data = au1000->ac97_ioport->cmd & 0xffff;
- spin_unlock(&au1000->ac97_lock);
-
- return data;
-
-}
-
-
-static void
-snd_au1000_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
-{
- struct snd_au1000 *au1000 = ac97->private_data;
- u32 cmd;
- int i;
-
- spin_lock(&au1000->ac97_lock);
-/* would rather use the interrupt than this polling but it works and I can't
-get the interrupt driven case to work efficiently */
- for (i = 0; i < 0x5000; i++)
- if (!(au1000->ac97_ioport->status & AC97C_CP))
- break;
- if (i == 0x5000)
- printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n");
-
- cmd = (u32) reg & AC97C_INDEX_MASK;
- cmd &= ~AC97C_READ;
- cmd |= ((u32) val << AC97C_WD_BIT);
- au1000->ac97_ioport->cmd = cmd;
- spin_unlock(&au1000->ac97_lock);
-}
-
-/*------------------------------ Setup / Destroy ----------------------------*/
-
-static void snd_au1000_free(struct snd_card *card)
-{
- struct snd_au1000 *au1000 = card->private_data;
-
- if (au1000->stream[PLAYBACK]) {
- if (au1000->stream[PLAYBACK]->dma >= 0)
- free_au1000_dma(au1000->stream[PLAYBACK]->dma);
- kfree(au1000->stream[PLAYBACK]);
- }
-
- if (au1000->stream[CAPTURE]) {
- if (au1000->stream[CAPTURE]->dma >= 0)
- free_au1000_dma(au1000->stream[CAPTURE]->dma);
- kfree(au1000->stream[CAPTURE]);
- }
-
- if (au1000->ac97_res_port) {
- /* put internal AC97 block into reset */
- if (au1000->ac97_ioport) {
- au1000->ac97_ioport->cntrl = AC97C_RS;
- iounmap(au1000->ac97_ioport);
- au1000->ac97_ioport = NULL;
- }
- release_and_free_resource(au1000->ac97_res_port);
- au1000->ac97_res_port = NULL;
- }
-}
-
-static struct snd_ac97_bus_ops ops = {
- .write = snd_au1000_ac97_write,
- .read = snd_au1000_ac97_read,
-};
-
-static int au1000_ac97_probe(struct platform_device *pdev)
-{
- int err;
- void __iomem *io;
- struct resource *r;
- struct snd_card *card;
- struct snd_au1000 *au1000;
- struct snd_ac97_bus *pbus;
- struct snd_ac97_template ac97;
-
- err = snd_card_new(&pdev->dev, -1, "AC97", THIS_MODULE,
- sizeof(struct snd_au1000), &card);
- if (err < 0)
- return err;
-
- au1000 = card->private_data;
- au1000->card = card;
- spin_lock_init(&au1000->ac97_lock);
-
- /* from here on let ALSA call the special freeing function */
- card->private_free = snd_au1000_free;
-
- /* TX DMA ID */
- r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!r) {
- err = -ENODEV;
- snd_printk(KERN_INFO "no TX DMA platform resource!\n");
- goto out;
- }
- au1000->dmaid[0] = r->start;
-
- /* RX DMA ID */
- r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (!r) {
- err = -ENODEV;
- snd_printk(KERN_INFO "no RX DMA platform resource!\n");
- goto out;
- }
- au1000->dmaid[1] = r->start;
-
- au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream),
- GFP_KERNEL);
- if (!au1000->stream[PLAYBACK]) {
- err = -ENOMEM;
- goto out;
- }
- au1000->stream[PLAYBACK]->dma = -1;
-
- au1000->stream[CAPTURE] = kmalloc(sizeof(struct audio_stream),
- GFP_KERNEL);
- if (!au1000->stream[CAPTURE]) {
- err = -ENOMEM;
- goto out;
- }
- au1000->stream[CAPTURE]->dma = -1;
-
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!r) {
- err = -ENODEV;
- goto out;
- }
-
- err = -EBUSY;
- au1000->ac97_res_port = request_mem_region(r->start, resource_size(r),
- pdev->name);
- if (!au1000->ac97_res_port) {
- snd_printk(KERN_ERR "ALSA AC97: can't grab AC97 port\n");
- goto out;
- }
-
- io = ioremap(r->start, resource_size(r));
- if (!io)
- goto out;
-
- au1000->ac97_ioport = (struct au1000_ac97_reg *)io;
-
- /* configure pins for AC'97
- TODO: move to board_setup.c */
- au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC);
-
- /* Initialise Au1000's AC'97 Control Block */
- au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE;
- udelay(10);
- au1000->ac97_ioport->cntrl = AC97C_CE;
- udelay(10);
-
- /* Initialise External CODEC -- cold reset */
- au1000->ac97_ioport->config = AC97C_RESET;
- udelay(10);
- au1000->ac97_ioport->config = 0x0;
- mdelay(5);
-
- /* Initialise AC97 middle-layer */
- err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus);
- if (err < 0)
- goto out;
-
- memset(&ac97, 0, sizeof(ac97));
- ac97.private_data = au1000;
- err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97);
- if (err < 0)
- goto out;
-
- err = snd_au1000_pcm_new(au1000);
- if (err < 0)
- goto out;
-
- strcpy(card->driver, "Au1000-AC97");
- strcpy(card->shortname, "AMD Au1000-AC97");
- sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver");
-
- err = snd_card_register(card);
- if (err < 0)
- goto out;
-
- printk(KERN_INFO "ALSA AC97: Driver Initialized\n");
-
- platform_set_drvdata(pdev, card);
-
- return 0;
-
- out:
- snd_card_free(card);
- return err;
-}
-
-static int au1000_ac97_remove(struct platform_device *pdev)
-{
- return snd_card_free(platform_get_drvdata(pdev));
-}
-
-struct platform_driver au1000_ac97c_driver = {
- .driver = {
- .name = "au1000-ac97c",
- .owner = THIS_MODULE,
- },
- .probe = au1000_ac97_probe,
- .remove = au1000_ac97_remove,
-};
-
-module_platform_driver(au1000_ac97c_driver);
projects / mirror_ubuntu-bionic-kernel.git / commitdiff