[ALSA] au1x00 - Code clean up
Modules: MIPS AU1x00 driver Clean up snd-au1x00 driver code: - Remove global variables - Remove old compatibility codes - Fix DMA-link allocation/release functions in hw_params and hw_free callbacks (they may be called multiple times) - Fix spinlocks Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
Jaroslav Kysela
parent
6560c349c5
commit
33ea25c113
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@ -50,12 +50,7 @@
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MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>");
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MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver");
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MODULE_LICENSE("GPL");
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#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8)
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MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}");
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#else
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MODULE_CLASSES("{sound}");
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MODULE_DEVICES("{{AMD,Au1000 AC'97}}");
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#endif
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#define PLAYBACK 0
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#define CAPTURE 1
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@ -68,8 +63,6 @@ MODULE_DEVICES("{{AMD,Au1000 AC'97}}");
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#define READ_WAIT 2
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#define RW_DONE 3
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DECLARE_WAIT_QUEUE_HEAD(ac97_command_wq);
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typedef struct au1000_period au1000_period_t;
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struct au1000_period
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{
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@ -94,7 +87,8 @@ struct audio_stream {
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int dma;
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spinlock_t dma_lock;
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au1000_period_t * buffer;
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unsigned long period_size;
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unsigned int period_size;
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unsigned int periods;
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};
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typedef struct snd_card_au1000 {
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@ -109,11 +103,9 @@ typedef struct snd_card_au1000 {
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audio_stream_t *stream[2]; /* playback & capture */
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} au1000_t;
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static au1000_t *au1000 = NULL;
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/*--------------------------- Local Functions --------------------------------*/
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static void
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au1000_set_ac97_xmit_slots(long xmit_slots)
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au1000_set_ac97_xmit_slots(au1000_t *au1000, long xmit_slots)
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{
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u32 volatile ac97_config;
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@ -126,7 +118,7 @@ au1000_set_ac97_xmit_slots(long xmit_slots)
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}
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static void
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au1000_set_ac97_recv_slots(long recv_slots)
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au1000_set_ac97_recv_slots(au1000_t *au1000, long recv_slots)
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{
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u32 volatile ac97_config;
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@ -140,79 +132,92 @@ au1000_set_ac97_recv_slots(long recv_slots)
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static void
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au1000_dma_stop(audio_stream_t *stream)
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au1000_release_dma_link(audio_stream_t *stream)
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{
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unsigned long flags;
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au1000_period_t * pointer;
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au1000_period_t * pointer_next;
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if (stream->buffer != NULL) {
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spin_lock_irqsave(&stream->dma_lock, flags);
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disable_dma(stream->dma);
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spin_unlock_irqrestore(&stream->dma_lock, flags);
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stream->period_size = 0;
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stream->periods = 0;
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pointer = stream->buffer;
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if (! pointer)
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return;
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do {
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pointer_next = pointer->next;
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kfree(pointer);
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pointer = pointer_next;
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} while (pointer != stream->buffer);
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stream->buffer = NULL;
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}
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pointer = stream->buffer;
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pointer_next = stream->buffer->next;
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static int
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au1000_setup_dma_link(audio_stream_t *stream, unsigned int period_bytes,
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unsigned int periods)
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{
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snd_pcm_substream_t *substream = stream->substream;
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snd_pcm_runtime_t *runtime = substream->runtime;
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unsigned long dma_start;
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int i;
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do {
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kfree(pointer);
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pointer = pointer_next;
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pointer_next = pointer->next;
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} while (pointer != stream->buffer);
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dma_start = virt_to_phys(runtime->dma_area);
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stream->buffer = NULL;
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if (stream->period_size == period_bytes &&
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stream->periods == periods)
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return 0; /* not changed */
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au1000_release_dma_link(stream);
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stream->period_size = period_bytes;
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stream->periods = periods;
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stream->buffer = kmalloc(sizeof(au1000_period_t), GFP_KERNEL);
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if (! stream->buffer)
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return -ENOMEM;
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pointer = stream->buffer;
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for (i = 0; i < periods; i++) {
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pointer->start = (u32)(dma_start + (i * period_bytes));
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pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1);
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if (i < periods - 1) {
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pointer->next = kmalloc(sizeof(struct au1000_period), GFP_KERNEL);
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if (! pointer->next) {
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au1000_release_dma_link(stream);
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return -ENOMEM;
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}
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pointer = pointer->next;
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}
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}
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pointer->next = stream->buffer;
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return 0;
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}
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static void
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au1000_dma_stop(audio_stream_t *stream)
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{
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snd_assert(stream->buffer, return);
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disable_dma(stream->dma);
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}
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static void
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au1000_dma_start(audio_stream_t *stream)
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{
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snd_pcm_substream_t *substream = stream->substream;
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_assert(stream->buffer, return);
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unsigned long flags, dma_start;
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int i;
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au1000_period_t * pointer;
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if (stream->buffer == NULL) {
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dma_start = virt_to_phys(runtime->dma_area);
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stream->period_size = frames_to_bytes(runtime,
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runtime->period_size);
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stream->buffer = kmalloc(sizeof(au1000_period_t), GFP_KERNEL);
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pointer = stream->buffer;
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for (i = 0 ; i < runtime->periods ; i++) {
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pointer->start = (u32)(dma_start +
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(i * stream->period_size));
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pointer->relative_end = (u32)
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(((i+1) * stream->period_size) - 0x1);
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if ( i < runtime->periods - 1) {
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pointer->next = kmalloc(sizeof(au1000_period_t)
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, GFP_KERNEL);
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pointer = pointer->next;
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}
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}
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pointer->next = stream->buffer;
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spin_lock_irqsave(&stream->dma_lock, flags);
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init_dma(stream->dma);
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if (get_dma_active_buffer(stream->dma) == 0) {
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clear_dma_done0(stream->dma);
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set_dma_addr0(stream->dma, stream->buffer->start);
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set_dma_count0(stream->dma, stream->period_size >> 1);
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set_dma_addr1(stream->dma, stream->buffer->next->start);
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set_dma_count1(stream->dma, stream->period_size >> 1);
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} else {
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clear_dma_done1(stream->dma);
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set_dma_addr1(stream->dma, stream->buffer->start);
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set_dma_count1(stream->dma, stream->period_size >> 1);
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set_dma_addr0(stream->dma, stream->buffer->next->start);
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set_dma_count0(stream->dma, stream->period_size >> 1);
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}
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enable_dma_buffers(stream->dma);
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start_dma(stream->dma);
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spin_unlock_irqrestore(&stream->dma_lock, flags);
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init_dma(stream->dma);
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if (get_dma_active_buffer(stream->dma) == 0) {
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clear_dma_done0(stream->dma);
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set_dma_addr0(stream->dma, stream->buffer->start);
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set_dma_count0(stream->dma, stream->period_size >> 1);
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set_dma_addr1(stream->dma, stream->buffer->next->start);
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set_dma_count1(stream->dma, stream->period_size >> 1);
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} else {
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clear_dma_done1(stream->dma);
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set_dma_addr1(stream->dma, stream->buffer->start);
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set_dma_count1(stream->dma, stream->period_size >> 1);
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set_dma_addr0(stream->dma, stream->buffer->next->start);
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set_dma_count0(stream->dma, stream->period_size >> 1);
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}
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enable_dma_buffers(stream->dma);
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start_dma(stream->dma);
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}
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static irqreturn_t
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@ -238,11 +243,9 @@ au1000_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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enable_dma_buffer1(stream->dma);
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break;
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case (DMA_D0 | DMA_D1):
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spin_unlock(&stream->dma_lock);
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printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma);
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au1000_dma_stop(stream);
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au1000_dma_start(stream);
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spin_lock(&stream->dma_lock);
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break;
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case (~DMA_D0 & ~DMA_D1):
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printk(KERN_ERR "DMA %d empty irq.\n",stream->dma);
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@ -261,7 +264,7 @@ static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
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.mask = 0,
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};
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static snd_pcm_hardware_t snd_au1000 =
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static snd_pcm_hardware_t snd_au1000_hw =
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{
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.info = (SNDRV_PCM_INFO_INTERLEAVED | \
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SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
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@ -283,10 +286,12 @@ static snd_pcm_hardware_t snd_au1000 =
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static int
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snd_au1000_playback_open(snd_pcm_substream_t * substream)
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{
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au1000_t *au1000 = substream->pcm->private_data;
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au1000->stream[PLAYBACK]->substream = substream;
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au1000->stream[PLAYBACK]->buffer = NULL;
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substream->private_data = au1000->stream[PLAYBACK];
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substream->runtime->hw = snd_au1000;
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substream->runtime->hw = snd_au1000_hw;
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return (snd_pcm_hw_constraint_list(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
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}
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@ -294,10 +299,12 @@ snd_au1000_playback_open(snd_pcm_substream_t * substream)
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static int
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snd_au1000_capture_open(snd_pcm_substream_t * substream)
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{
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au1000_t *au1000 = substream->pcm->private_data;
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au1000->stream[CAPTURE]->substream = substream;
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au1000->stream[CAPTURE]->buffer = NULL;
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substream->private_data = au1000->stream[CAPTURE];
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substream->runtime->hw = snd_au1000;
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substream->runtime->hw = snd_au1000_hw;
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return (snd_pcm_hw_constraint_list(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0);
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@ -306,6 +313,8 @@ snd_au1000_capture_open(snd_pcm_substream_t * substream)
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static int
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snd_au1000_playback_close(snd_pcm_substream_t * substream)
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{
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au1000_t *au1000 = substream->pcm->private_data;
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au1000->stream[PLAYBACK]->substream = NULL;
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return 0;
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}
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@ -313,6 +322,8 @@ snd_au1000_playback_close(snd_pcm_substream_t * substream)
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static int
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snd_au1000_capture_close(snd_pcm_substream_t * substream)
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{
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au1000_t *au1000 = substream->pcm->private_data;
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au1000->stream[CAPTURE]->substream = NULL;
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return 0;
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}
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@ -321,25 +332,36 @@ static int
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snd_au1000_hw_params(snd_pcm_substream_t * substream,
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snd_pcm_hw_params_t * hw_params)
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{
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return snd_pcm_lib_malloc_pages(substream,
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params_buffer_bytes(hw_params));
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audio_stream_t *stream = substream->private_data;
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int err;
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err = snd_pcm_lib_malloc_pages(substream,
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params_buffer_bytes(hw_params));
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if (err < 0)
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return err;
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return au1000_setup_dma_link(stream,
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params_period_bytes(hw_params),
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params_periods(hw_params));
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}
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static int
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snd_au1000_hw_free(snd_pcm_substream_t * substream)
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{
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audio_stream_t *stream = substream->private_data;
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au1000_release_dma_link(stream);
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return snd_pcm_lib_free_pages(substream);
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}
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static int
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snd_au1000_playback_prepare(snd_pcm_substream_t * substream)
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{
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au1000_t *au1000 = substream->pcm->private_data;
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snd_pcm_runtime_t *runtime = substream->runtime;
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if (runtime->channels == 1 )
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au1000_set_ac97_xmit_slots(AC97_SLOT_4);
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if (runtime->channels == 1)
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au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_4);
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else
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au1000_set_ac97_xmit_slots(AC97_SLOT_3 | AC97_SLOT_4);
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au1000_set_ac97_xmit_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
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snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
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return 0;
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}
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@ -347,12 +369,13 @@ snd_au1000_playback_prepare(snd_pcm_substream_t * substream)
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static int
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snd_au1000_capture_prepare(snd_pcm_substream_t * substream)
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{
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au1000_t *au1000 = substream->pcm->private_data;
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snd_pcm_runtime_t *runtime = substream->runtime;
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if (runtime->channels == 1 )
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au1000_set_ac97_recv_slots(AC97_SLOT_4);
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if (runtime->channels == 1)
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au1000_set_ac97_recv_slots(au1000, AC97_SLOT_4);
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else
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au1000_set_ac97_recv_slots(AC97_SLOT_3 | AC97_SLOT_4);
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au1000_set_ac97_recv_slots(au1000, AC97_SLOT_3 | AC97_SLOT_4);
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snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
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return 0;
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}
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@ -363,6 +386,7 @@ snd_au1000_trigger(snd_pcm_substream_t * substream, int cmd)
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audio_stream_t *stream = substream->private_data;
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int err = 0;
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spin_lock(&stream->dma_lock);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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au1000_dma_start(stream);
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@ -374,6 +398,7 @@ snd_au1000_trigger(snd_pcm_substream_t * substream, int cmd)
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err = -EINVAL;
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break;
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}
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spin_unlock(&stream->dma_lock);
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return err;
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}
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@ -382,12 +407,11 @@ snd_au1000_pointer(snd_pcm_substream_t * substream)
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{
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audio_stream_t *stream = substream->private_data;
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snd_pcm_runtime_t *runtime = substream->runtime;
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unsigned long flags;
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long location;
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spin_lock_irqsave(&stream->dma_lock, flags);
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spin_lock(&stream->dma_lock);
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location = get_dma_residue(stream->dma);
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spin_unlock_irqrestore(&stream->dma_lock, flags);
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spin_unlock(&stream->dma_lock);
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location = stream->buffer->relative_end - location;
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if (location == -1)
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location = 0;
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@ -438,6 +462,9 @@ snd_au1000_pcm_new(void)
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pcm->info_flags = 0;
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strcpy(pcm->name, "Au1000 AC97 PCM");
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spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock);
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spin_lock_init(&au1000->stream[CAPTURE]->dma_lock);
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flags = claim_dma_lock();
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if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX,
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"AC97 TX", au1000_dma_interrupt, SA_INTERRUPT,
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@ -457,8 +484,6 @@ snd_au1000_pcm_new(void)
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set_dma_mode(au1000->stream[CAPTURE]->dma,
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get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC);
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release_dma_lock(flags);
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spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock);
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spin_lock_init(&au1000->stream[CAPTURE]->dma_lock);
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au1000->pcm = pcm;
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return 0;
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}
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@ -469,9 +494,11 @@ snd_au1000_pcm_new(void)
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static unsigned short
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snd_au1000_ac97_read(ac97_t *ac97, unsigned short reg)
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{
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au1000_t *au1000 = ac97->private_data;
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u32 volatile cmd;
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u16 volatile data;
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int i;
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spin_lock(&au1000->ac97_lock);
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/* would rather use the interupt than this polling but it works and I can't
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get the interupt driven case to work efficiently */
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@ -505,8 +532,10 @@ get the interupt driven case to work efficiently */
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static void
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snd_au1000_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val)
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{
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au1000_t *au1000 = ac97->private_data;
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u32 cmd;
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int i;
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spin_lock(&au1000->ac97_lock);
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/* would rather use the interupt than this polling but it works and I can't
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get the interupt driven case to work efficiently */
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@ -522,28 +551,13 @@ get the interupt driven case to work efficiently */
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au1000->ac97_ioport->cmd = cmd;
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spin_unlock(&au1000->ac97_lock);
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}
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static void
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snd_au1000_ac97_free(ac97_t *ac97)
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{
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au1000->ac97 = NULL;
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}
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static int __devinit
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snd_au1000_ac97_new(void)
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snd_au1000_ac97_new(au1000_t *au1000)
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{
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int err;
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#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8)
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||||
ac97_bus_t *pbus;
|
||||
ac97_template_t ac97;
|
||||
static ac97_bus_ops_t ops = {
|
||||
.write = snd_au1000_ac97_write,
|
||||
.read = snd_au1000_ac97_read,
|
||||
};
|
||||
#else
|
||||
ac97_bus_t bus, *pbus;
|
||||
ac97_t ac97;
|
||||
#endif
|
||||
|
||||
if ((au1000->ac97_res_port = request_region(AC97C_CONFIG,
|
||||
sizeof(au1000_ac97_reg_t), "Au1x00 AC97")) == NULL) {
|
||||
|
|
@ -554,8 +568,6 @@ snd_au1000_ac97_new(void)
|
|||
|
||||
spin_lock_init(&au1000->ac97_lock);
|
||||
|
||||
spin_lock(&au1000->ac97_lock);
|
||||
|
||||
/* configure pins for AC'97
|
||||
TODO: move to board_setup.c */
|
||||
au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC);
|
||||
|
|
@ -572,26 +584,16 @@ snd_au1000_ac97_new(void)
|
|||
au1000->ac97_ioport->config = 0x0;
|
||||
mdelay(5);
|
||||
|
||||
spin_unlock(&au1000->ac97_lock);
|
||||
|
||||
/* Initialise AC97 middle-layer */
|
||||
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8)
|
||||
if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0)
|
||||
return err;
|
||||
#else
|
||||
memset(&bus, 0, sizeof(bus));
|
||||
bus.write = snd_au1000_ac97_write;
|
||||
bus.read = snd_au1000_ac97_read;
|
||||
if ((err = snd_ac97_bus(au1000->card, &bus, &pbus)) < 0)
|
||||
return err;
|
||||
#endif
|
||||
|
||||
memset(&ac97, 0, sizeof(ac97));
|
||||
ac97.private_data = au1000;
|
||||
ac97.private_free = snd_au1000_ac97_free;
|
||||
if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0)
|
||||
return err;
|
||||
return 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*------------------------------ Setup / Destroy ----------------------------*/
|
||||
|
|
@ -599,6 +601,7 @@ snd_au1000_ac97_new(void)
|
|||
void
|
||||
snd_au1000_free(snd_card_t *card)
|
||||
{
|
||||
au1000_t *au1000 = card->private_data;
|
||||
|
||||
if (au1000->ac97_res_port) {
|
||||
/* put internal AC97 block into reset */
|
||||
|
|
@ -614,73 +617,70 @@ snd_au1000_free(snd_card_t *card)
|
|||
free_au1000_dma(au1000->stream[CAPTURE]->dma);
|
||||
|
||||
kfree(au1000->stream[PLAYBACK]);
|
||||
au1000->stream[PLAYBACK] = NULL;
|
||||
kfree(au1000->stream[CAPTURE]);
|
||||
au1000->stream[CAPTURE] = NULL;
|
||||
kfree(au1000);
|
||||
au1000 = NULL;
|
||||
|
||||
}
|
||||
|
||||
|
||||
static snd_card_t *au1000_card;
|
||||
|
||||
static int __init
|
||||
au1000_init(void)
|
||||
{
|
||||
int err;
|
||||
snd_card_t *card;
|
||||
au1000_t *au1000;
|
||||
|
||||
au1000 = kmalloc(sizeof(au1000_t), GFP_KERNEL);
|
||||
if (au1000 == NULL)
|
||||
return -ENOMEM;
|
||||
au1000->stream[PLAYBACK] = kmalloc(sizeof(audio_stream_t), GFP_KERNEL);
|
||||
if (au1000->stream[PLAYBACK] == NULL)
|
||||
return -ENOMEM;
|
||||
au1000->stream[CAPTURE] = kmalloc(sizeof(audio_stream_t), GFP_KERNEL);
|
||||
if (au1000->stream[CAPTURE] == NULL)
|
||||
card = snd_card_new(-1, "AC97", THIS_MODULE, sizeof(au1000_t));
|
||||
if (card == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
card->private_free = snd_au1000_free;
|
||||
au1000 = card->private_data;
|
||||
/* so that snd_au1000_free will work as intended */
|
||||
au1000->card = card;
|
||||
au1000->stream[PLAYBACK]->dma = -1;
|
||||
au1000->stream[CAPTURE]->dma = -1;
|
||||
au1000->ac97_res_port = NULL;
|
||||
|
||||
au1000->card = snd_card_new(-1, "AC97", THIS_MODULE, sizeof(au1000_t));
|
||||
if (au1000->card == NULL) {
|
||||
snd_au1000_free(au1000->card);
|
||||
au1000->stream[PLAYBACK] = kmalloc(sizeof(audio_stream_t), GFP_KERNEL);
|
||||
au1000->stream[CAPTURE] = kmalloc(sizeof(audio_stream_t), GFP_KERNEL);
|
||||
if (au1000->stream[PLAYBACK] == NULL ||
|
||||
au1000->stream[CAPTURE] == NULL) {
|
||||
snd_card_free(card);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
au1000->card->private_data = (au1000_t *)au1000;
|
||||
au1000->card->private_free = snd_au1000_free;
|
||||
|
||||
if ((err = snd_au1000_ac97_new()) < 0 ) {
|
||||
snd_card_free(au1000->card);
|
||||
if ((err = snd_au1000_ac97_new(au1000)) < 0 ) {
|
||||
snd_card_free(card);
|
||||
return err;
|
||||
}
|
||||
|
||||
if ((err = snd_au1000_pcm_new()) < 0) {
|
||||
snd_card_free(au1000->card);
|
||||
if ((err = snd_au1000_pcm_new(au1000)) < 0) {
|
||||
snd_card_free(card);
|
||||
return err;
|
||||
}
|
||||
|
||||
strcpy(au1000->card->driver, "AMD-Au1000-AC97");
|
||||
strcpy(au1000->card->shortname, "Au1000-AC97");
|
||||
sprintf(au1000->card->longname, "AMD Au1000--AC97 ALSA Driver");
|
||||
strcpy(card->driver, "Au1000-AC97");
|
||||
strcpy(card->shortname, "AMD Au1000-AC97");
|
||||
sprintf(card->longname, "AMD Au1000--AC97 ALSA Driver");
|
||||
|
||||
if ((err = snd_card_set_generic_dev(au1000->card)) < 0) {
|
||||
snd_card_free(au1000->card);
|
||||
if ((err = snd_card_set_generic_dev(card)) < 0) {
|
||||
snd_card_free(card);
|
||||
return err;
|
||||
}
|
||||
|
||||
if ((err = snd_card_register(au1000->card)) < 0) {
|
||||
snd_card_free(au1000->card);
|
||||
if ((err = snd_card_register(card)) < 0) {
|
||||
snd_card_free(card);
|
||||
return err;
|
||||
}
|
||||
|
||||
printk( KERN_INFO "ALSA AC97: Driver Initialized\n" );
|
||||
au1000_card = card;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit au1000_exit(void)
|
||||
{
|
||||
snd_card_free(au1000->card);
|
||||
snd_card_free(au1000_card);
|
||||
}
|
||||
|
||||
module_init(au1000_init);
|
||||
|
|
|
|||
Loading…
Reference in New Issue