forked from Minki/linux
ALSA: ca0106: Allocate resources with device-managed APIs
This patch converts the resource management in PCI ca0106 driver with devres as a clean up. Each manual resource management is converted with the corresponding devres helper, and the card object release is managed now via card->private_free instead of a lowlevel snd_device. This should give no user-visible functional changes. Link: https://lore.kernel.org/r/20210715075941.23332-30-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
parent
33631012cd
commit
1656fa6ea2
@ -667,7 +667,6 @@ struct snd_ca0106 {
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struct pci_dev *pci;
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unsigned long port;
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struct resource *res_port;
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int irq;
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unsigned int serial; /* serial number */
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@ -688,7 +687,7 @@ struct snd_ca0106 {
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u8 i2c_capture_volume[4][2];
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int capture_mic_line_in;
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struct snd_dma_buffer buffer;
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struct snd_dma_buffer *buffer;
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struct snd_ca_midi midi;
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struct snd_ca_midi midi2;
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@ -718,7 +718,7 @@ static int snd_ca0106_pcm_prepare_playback(struct snd_pcm_substream *substream)
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_ca0106_pcm *epcm = runtime->private_data;
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int channel = epcm->channel_id;
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u32 *table_base = (u32 *)(emu->buffer.area+(8*16*channel));
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u32 *table_base = (u32 *)(emu->buffer->area+(8*16*channel));
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u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
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u32 hcfg_mask = HCFG_PLAYBACK_S32_LE;
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u32 hcfg_set = 0x00000000;
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@ -746,7 +746,7 @@ static int snd_ca0106_pcm_prepare_playback(struct snd_pcm_substream *substream)
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runtime->dma_addr, runtime->dma_area, table_base);
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dev_dbg(emu->card->dev,
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"dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",
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emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
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emu->buffer->addr, emu->buffer->area, emu->buffer->bytes);
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#endif /* debug */
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/* Rate can be set per channel. */
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/* reg40 control host to fifo */
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@ -796,13 +796,13 @@ static int snd_ca0106_pcm_prepare_playback(struct snd_pcm_substream *substream)
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reg71 = (reg71 & ~reg71_mask) | reg71_set;
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snd_ca0106_ptr_write(emu, 0x71, 0, reg71);
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/* FIXME: Check emu->buffer.size before actually writing to it. */
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/* FIXME: Check emu->buffer->size before actually writing to it. */
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for(i=0; i < runtime->periods; i++) {
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table_base[i*2] = runtime->dma_addr + (i * period_size_bytes);
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table_base[i*2+1] = period_size_bytes << 16;
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}
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snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer.addr+(8*16*channel));
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snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer->addr+(8*16*channel));
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snd_ca0106_ptr_write(emu, PLAYBACK_LIST_SIZE, channel, (runtime->periods - 1) << 19);
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snd_ca0106_ptr_write(emu, PLAYBACK_LIST_PTR, channel, 0);
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snd_ca0106_ptr_write(emu, PLAYBACK_DMA_ADDR, channel, runtime->dma_addr);
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@ -853,7 +853,7 @@ static int snd_ca0106_pcm_prepare_capture(struct snd_pcm_substream *substream)
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runtime->dma_addr, runtime->dma_area, table_base);
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dev_dbg(emu->card->dev,
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"dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",
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emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
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emu->buffer->addr, emu->buffer->area, emu->buffer->bytes);
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#endif /* debug */
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/* reg71 controls ADC rate. */
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switch (runtime->rate) {
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@ -1183,32 +1183,11 @@ static int snd_ca0106_ac97(struct snd_ca0106 *chip)
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static void ca0106_stop_chip(struct snd_ca0106 *chip);
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static int snd_ca0106_free(struct snd_ca0106 *chip)
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static void snd_ca0106_free(struct snd_card *card)
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{
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if (chip->res_port != NULL) {
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/* avoid access to already used hardware */
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ca0106_stop_chip(chip);
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}
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if (chip->irq >= 0)
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free_irq(chip->irq, chip);
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// release the data
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#if 1
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if (chip->buffer.area)
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snd_dma_free_pages(&chip->buffer);
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#endif
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struct snd_ca0106 *chip = card->private_data;
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// release the i/o port
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release_and_free_resource(chip->res_port);
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pci_disable_device(chip->pci);
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kfree(chip);
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return 0;
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}
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static int snd_ca0106_dev_free(struct snd_device *device)
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{
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struct snd_ca0106 *chip = device->device_data;
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return snd_ca0106_free(chip);
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ca0106_stop_chip(chip);
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}
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static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id)
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@ -1594,50 +1573,33 @@ static void ca0106_stop_chip(struct snd_ca0106 *chip)
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}
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static int snd_ca0106_create(int dev, struct snd_card *card,
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struct pci_dev *pci,
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struct snd_ca0106 **rchip)
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struct pci_dev *pci)
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{
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struct snd_ca0106 *chip;
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struct snd_ca0106 *chip = card->private_data;
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const struct snd_ca0106_details *c;
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int err;
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static const struct snd_device_ops ops = {
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.dev_free = snd_ca0106_dev_free,
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};
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*rchip = NULL;
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err = pci_enable_device(pci);
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err = pcim_enable_device(pci);
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if (err < 0)
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return err;
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if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
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dev_err(card->dev, "error to set 32bit mask DMA\n");
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pci_disable_device(pci);
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return -ENXIO;
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}
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chip = kzalloc(sizeof(*chip), GFP_KERNEL);
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if (chip == NULL) {
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pci_disable_device(pci);
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return -ENOMEM;
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}
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chip->card = card;
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chip->pci = pci;
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chip->irq = -1;
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spin_lock_init(&chip->emu_lock);
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err = pci_request_regions(pci, "snd_ca0106");
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if (err < 0)
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return err;
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chip->port = pci_resource_start(pci, 0);
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chip->res_port = request_region(chip->port, 0x20, "snd_ca0106");
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if (!chip->res_port) {
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snd_ca0106_free(chip);
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dev_err(card->dev, "cannot allocate the port\n");
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return -EBUSY;
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}
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if (request_irq(pci->irq, snd_ca0106_interrupt,
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IRQF_SHARED, KBUILD_MODNAME, chip)) {
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snd_ca0106_free(chip);
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if (devm_request_irq(&pci->dev, pci->irq, snd_ca0106_interrupt,
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IRQF_SHARED, KBUILD_MODNAME, chip)) {
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dev_err(card->dev, "cannot grab irq\n");
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return -EBUSY;
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}
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@ -1645,11 +1607,9 @@ static int snd_ca0106_create(int dev, struct snd_card *card,
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card->sync_irq = chip->irq;
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/* This stores the periods table. */
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if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &pci->dev,
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1024, &chip->buffer) < 0) {
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snd_ca0106_free(chip);
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chip->buffer = snd_devm_alloc_pages(&pci->dev, SNDRV_DMA_TYPE_DEV, 1024);
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if (!chip->buffer)
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return -ENOMEM;
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}
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pci_set_master(pci);
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/* read serial */
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@ -1678,13 +1638,6 @@ static int snd_ca0106_create(int dev, struct snd_card *card,
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c->name, chip->port, chip->irq);
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ca0106_init_chip(chip, 0);
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err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
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if (err < 0) {
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snd_ca0106_free(chip);
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return err;
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}
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*rchip = chip;
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return 0;
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}
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@ -1787,36 +1740,37 @@ static int snd_ca0106_probe(struct pci_dev *pci,
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return -ENOENT;
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}
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err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
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0, &card);
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err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
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sizeof(*chip), &card);
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if (err < 0)
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return err;
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chip = card->private_data;
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err = snd_ca0106_create(dev, card, pci, &chip);
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err = snd_ca0106_create(dev, card, pci);
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if (err < 0)
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goto error;
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card->private_data = chip;
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return err;
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card->private_free = snd_ca0106_free;
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for (i = 0; i < 4; i++) {
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err = snd_ca0106_pcm(chip, i);
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if (err < 0)
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goto error;
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return err;
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}
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if (chip->details->ac97 == 1) {
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/* The SB0410 and SB0413 do not have an AC97 chip. */
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err = snd_ca0106_ac97(chip);
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if (err < 0)
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goto error;
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return err;
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}
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err = snd_ca0106_mixer(chip);
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if (err < 0)
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goto error;
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return err;
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dev_dbg(card->dev, "probe for MIDI channel A ...");
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err = snd_ca0106_midi(chip, CA0106_MIDI_CHAN_A);
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if (err < 0)
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goto error;
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return err;
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dev_dbg(card->dev, " done.\n");
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#ifdef CONFIG_SND_PROC_FS
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@ -1825,20 +1779,11 @@ static int snd_ca0106_probe(struct pci_dev *pci,
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err = snd_card_register(card);
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if (err < 0)
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goto error;
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return err;
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pci_set_drvdata(pci, card);
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dev++;
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return 0;
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error:
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snd_card_free(card);
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return err;
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}
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static void snd_ca0106_remove(struct pci_dev *pci)
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{
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snd_card_free(pci_get_drvdata(pci));
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}
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#ifdef CONFIG_PM_SLEEP
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@ -1894,7 +1839,6 @@ static struct pci_driver ca0106_driver = {
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.name = KBUILD_MODNAME,
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.id_table = snd_ca0106_ids,
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.probe = snd_ca0106_probe,
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.remove = snd_ca0106_remove,
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.driver = {
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.pm = SND_CA0106_PM_OPS,
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},
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