ALSA: ymfpci: Allocate resources with device-managed APIs

This patch converts the resource management in PCI ymfpci driver with
devres as a clean up.  Each manual resource management is converted
with the corresponding devres helper, the page allocations are done
with the 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/20210715075941.23332-52-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 47 insertions, 102 deletions

diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index 8fd060769882..c80114c0ad7b 100644
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -2116,11 +2116,12 @@ static int snd_ymfpci_memalloc(struct snd_ymfpci *chip)
 	       chip->work_size;
 	/* work_ptr must be aligned to 256 bytes, but it's already
 	   covered with the kernel page allocation mechanism */
-	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
-				size, &chip->work_ptr) < 0) 
+	chip->work_ptr = snd_devm_alloc_pages(&chip->pci->dev,
+					      SNDRV_DMA_TYPE_DEV, size);
+	if (!chip->work_ptr)
 		return -ENOMEM;
-	ptr = chip->work_ptr.area;
-	ptr_addr = chip->work_ptr.addr;
+	ptr = chip->work_ptr->area;
+	ptr_addr = chip->work_ptr->addr;
 	memset(ptr, 0, size);	/* for sure */
 
 	chip->bank_base_playback = ptr;
@@ -2165,7 +2166,7 @@ static int snd_ymfpci_memalloc(struct snd_ymfpci *chip)
 	chip->work_base_addr = ptr_addr;
 	
 	snd_BUG_ON(ptr + chip->work_size !=
-		   chip->work_ptr.area + chip->work_ptr.bytes);
+		   chip->work_ptr->area + chip->work_ptr->bytes);
 
 	snd_ymfpci_writel(chip, YDSXGR_PLAYCTRLBASE, chip->bank_base_playback_addr);
 	snd_ymfpci_writel(chip, YDSXGR_RECCTRLBASE, chip->bank_base_capture_addr);
@@ -2196,65 +2197,32 @@ static int snd_ymfpci_memalloc(struct snd_ymfpci *chip)
 	return 0;
 }
 
-static int snd_ymfpci_free(struct snd_ymfpci *chip)
+static void snd_ymfpci_free(struct snd_card *card)
 {
+	struct snd_ymfpci *chip = card->private_data;
 	u16 ctrl;
 
-	if (snd_BUG_ON(!chip))
-		return -EINVAL;
-
-	if (chip->res_reg_area) {	/* don't touch busy hardware */
-		snd_ymfpci_writel(chip, YDSXGR_NATIVEDACOUTVOL, 0);
-		snd_ymfpci_writel(chip, YDSXGR_BUF441OUTVOL, 0);
-		snd_ymfpci_writel(chip, YDSXGR_LEGACYOUTVOL, 0);
-		snd_ymfpci_writel(chip, YDSXGR_STATUS, ~0);
-		snd_ymfpci_disable_dsp(chip);
-		snd_ymfpci_writel(chip, YDSXGR_PLAYCTRLBASE, 0);
-		snd_ymfpci_writel(chip, YDSXGR_RECCTRLBASE, 0);
-		snd_ymfpci_writel(chip, YDSXGR_EFFCTRLBASE, 0);
-		snd_ymfpci_writel(chip, YDSXGR_WORKBASE, 0);
-		snd_ymfpci_writel(chip, YDSXGR_WORKSIZE, 0);
-		ctrl = snd_ymfpci_readw(chip, YDSXGR_GLOBALCTRL);
-		snd_ymfpci_writew(chip, YDSXGR_GLOBALCTRL, ctrl & ~0x0007);
-	}
+	snd_ymfpci_writel(chip, YDSXGR_NATIVEDACOUTVOL, 0);
+	snd_ymfpci_writel(chip, YDSXGR_BUF441OUTVOL, 0);
+	snd_ymfpci_writel(chip, YDSXGR_LEGACYOUTVOL, 0);
+	snd_ymfpci_writel(chip, YDSXGR_STATUS, ~0);
+	snd_ymfpci_disable_dsp(chip);
+	snd_ymfpci_writel(chip, YDSXGR_PLAYCTRLBASE, 0);
+	snd_ymfpci_writel(chip, YDSXGR_RECCTRLBASE, 0);
+	snd_ymfpci_writel(chip, YDSXGR_EFFCTRLBASE, 0);
+	snd_ymfpci_writel(chip, YDSXGR_WORKBASE, 0);
+	snd_ymfpci_writel(chip, YDSXGR_WORKSIZE, 0);
+	ctrl = snd_ymfpci_readw(chip, YDSXGR_GLOBALCTRL);
+	snd_ymfpci_writew(chip, YDSXGR_GLOBALCTRL, ctrl & ~0x0007);
 
 	snd_ymfpci_ac3_done(chip);
 
-	/* Set PCI device to D3 state */
-#if 0
-	/* FIXME: temporarily disabled, otherwise we cannot fire up
-	 * the chip again unless reboot.  ACPI bug?
-	 */
-	pci_set_power_state(chip->pci, PCI_D3hot);
-#endif
-
-#ifdef CONFIG_PM_SLEEP
-	kfree(chip->saved_regs);
-#endif
-	if (chip->irq >= 0)
-		free_irq(chip->irq, chip);
-	release_and_free_resource(chip->mpu_res);
-	release_and_free_resource(chip->fm_res);
 	snd_ymfpci_free_gameport(chip);
-	iounmap(chip->reg_area_virt);
-	if (chip->work_ptr.area)
-		snd_dma_free_pages(&chip->work_ptr);
 	
-	release_and_free_resource(chip->res_reg_area);
-
 	pci_write_config_word(chip->pci, 0x40, chip->old_legacy_ctrl);
 	
-	pci_disable_device(chip->pci);
 	release_firmware(chip->dsp_microcode);
 	release_firmware(chip->controller_microcode);
-	kfree(chip);
-	return 0;
-}
-
-static int snd_ymfpci_dev_free(struct snd_device *device)
-{
-	struct snd_ymfpci *chip = device->device_data;
-	return snd_ymfpci_free(chip);
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -2346,27 +2314,16 @@ SIMPLE_DEV_PM_OPS(snd_ymfpci_pm, snd_ymfpci_suspend, snd_ymfpci_resume);
 
 int snd_ymfpci_create(struct snd_card *card,
 		      struct pci_dev *pci,
-		      unsigned short old_legacy_ctrl,
-		      struct snd_ymfpci **rchip)
+		      unsigned short old_legacy_ctrl)
 {
-	struct snd_ymfpci *chip;
+	struct snd_ymfpci *chip = card->private_data;
 	int err;
-	static const struct snd_device_ops ops = {
-		.dev_free =	snd_ymfpci_dev_free,
-	};
 	
-	*rchip = NULL;
-
 	/* enable PCI device */
-	err = pci_enable_device(pci);
+	err = pcim_enable_device(pci);
 	if (err < 0)
 		return err;
 
-	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (chip == NULL) {
-		pci_disable_device(pci);
-		return -ENOMEM;
-	}
 	chip->old_legacy_ctrl = old_legacy_ctrl;
 	spin_lock_init(&chip->reg_lock);
 	spin_lock_init(&chip->voice_lock);
@@ -2377,71 +2334,59 @@ int snd_ymfpci_create(struct snd_card *card,
 	chip->irq = -1;
 	chip->device_id = pci->device;
 	chip->rev = pci->revision;
-	chip->reg_area_phys = pci_resource_start(pci, 0);
-	chip->reg_area_virt = ioremap(chip->reg_area_phys, 0x8000);
-	pci_set_master(pci);
-	chip->src441_used = -1;
 
-	chip->res_reg_area = request_mem_region(chip->reg_area_phys, 0x8000, "YMFPCI");
-	if (!chip->res_reg_area) {
+	err = pci_request_regions(pci, "YMFPCI");
+	if (err < 0)
+		return err;
+
+	chip->reg_area_phys = pci_resource_start(pci, 0);
+	chip->reg_area_virt = devm_ioremap(&pci->dev, chip->reg_area_phys, 0x8000);
+	if (!chip->reg_area_virt) {
 		dev_err(chip->card->dev,
 			"unable to grab memory region 0x%lx-0x%lx\n",
 			chip->reg_area_phys, chip->reg_area_phys + 0x8000 - 1);
-		err = -EBUSY;
-		goto free_chip;
+		return -EBUSY;
 	}
-	if (request_irq(pci->irq, snd_ymfpci_interrupt, IRQF_SHARED,
+	pci_set_master(pci);
+	chip->src441_used = -1;
+
+	if (devm_request_irq(&pci->dev, pci->irq, snd_ymfpci_interrupt, IRQF_SHARED,
 			KBUILD_MODNAME, chip)) {
 		dev_err(chip->card->dev, "unable to grab IRQ %d\n", pci->irq);
-		err = -EBUSY;
-		goto free_chip;
+		return -EBUSY;
 	}
 	chip->irq = pci->irq;
 	card->sync_irq = chip->irq;
+	card->private_free = snd_ymfpci_free;
 
 	snd_ymfpci_aclink_reset(pci);
-	if (snd_ymfpci_codec_ready(chip, 0) < 0) {
-		err = -EIO;
-		goto free_chip;
-	}
+	if (snd_ymfpci_codec_ready(chip, 0) < 0)
+		return -EIO;
 
 	err = snd_ymfpci_request_firmware(chip);
 	if (err < 0) {
 		dev_err(chip->card->dev, "firmware request failed: %d\n", err);
-		goto free_chip;
+		return err;
 	}
 	snd_ymfpci_download_image(chip);
 
 	udelay(100); /* seems we need a delay after downloading image.. */
 
-	if (snd_ymfpci_memalloc(chip) < 0) {
-		err = -EIO;
-		goto free_chip;
-	}
+	if (snd_ymfpci_memalloc(chip) < 0)
+		return -EIO;
 
 	err = snd_ymfpci_ac3_init(chip);
 	if (err < 0)
-		goto free_chip;
+		return err;
 
 #ifdef CONFIG_PM_SLEEP
-	chip->saved_regs = kmalloc_array(YDSXGR_NUM_SAVED_REGS, sizeof(u32),
-					 GFP_KERNEL);
-	if (chip->saved_regs == NULL) {
-		err = -ENOMEM;
-		goto free_chip;
-	}
+	chip->saved_regs = devm_kmalloc_array(&pci->dev, YDSXGR_NUM_SAVED_REGS,
+					      sizeof(u32), GFP_KERNEL);
+	if (!chip->saved_regs)
+		return -ENOMEM;
 #endif
 
-	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
-	if (err < 0)
-		goto free_chip;
-
 	snd_ymfpci_proc_init(card, chip);
 
-	*rchip = chip;
 	return 0;
-
-free_chip:
-	snd_ymfpci_free(chip);
-	return err;
 }