[ALSA] sb16 - Use platform_device and add PnP support
Takashi Iwai [Thu, 17 Nov 2005 15:54:56 +0000 (16:54 +0100)]
Modules: SB16/AWE driver

Rewrite the probe/remove with platform_device.
Add PM support using PnP suspend/resume callbacks.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/sb/sb16.c

index 96e4013..05816c5 100644 (file)
@@ -24,6 +24,8 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/pnp.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
 #include <linux/moduleparam.h>
 #include <sound/core.h>
 #include <sound/sb.h>
@@ -32,7 +34,6 @@
 #include <sound/opl3.h>
 #include <sound/emu8000.h>
 #include <sound/seq_device.h>
-#define SNDRV_LEGACY_AUTO_PROBE
 #define SNDRV_LEGACY_FIND_FREE_IRQ
 #define SNDRV_LEGACY_FIND_FREE_DMA
 #include <sound/initval.h>
@@ -129,6 +130,7 @@ MODULE_PARM_DESC(seq_ports, "Number of sequencer ports for WaveTable synth.");
 
 struct snd_card_sb16 {
        struct resource *fm_res;        /* used to block FM i/o region for legacy cards */
+       struct snd_sb *chip;
 #ifdef CONFIG_PNP
        int dev_no;
        struct pnp_dev *dev;
@@ -138,8 +140,6 @@ struct snd_card_sb16 {
 #endif
 };
 
-static struct snd_card *snd_sb16_legacy[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
-
 #ifdef CONFIG_PNP
 
 static struct pnp_card_device_id snd_sb16_pnpids[] = {
@@ -341,7 +341,7 @@ __wt_error:
 
 static void snd_sb16_free(struct snd_card *card)
 {
-       struct snd_card_sb16 *acard = (struct snd_card_sb16 *)card->private_data;
+       struct snd_card_sb16 *acard = card->private_data;
         
        if (acard == NULL)
                return;
@@ -354,17 +354,21 @@ static void snd_sb16_free(struct snd_card *card)
 #define is_isapnp_selected(dev)                0
 #endif
 
-static int __init snd_sb16_probe(int dev,
-                                struct pnp_card_link *pcard,
-                                const struct pnp_card_device_id *pid)
+static struct snd_card *snd_sb16_card_new(int dev)
+{
+       struct snd_card *card = snd_card_new(index[dev], id[dev], THIS_MODULE,
+                                       sizeof(struct snd_card_sb16));
+       if (card == NULL)
+               return NULL;
+       card->private_free = snd_sb16_free;
+       return card;
+}
+
+static int __init snd_sb16_probe(struct snd_card *card, int dev)
 {
-       static int possible_irqs[] = {5, 9, 10, 7, -1};
-       static int possible_dmas8[] = {1, 3, 0, -1};
-       static int possible_dmas16[] = {5, 6, 7, -1};
        int xirq, xdma8, xdma16;
        struct snd_sb *chip;
-       struct snd_card *card;
-       struct snd_card_sb16 *acard;
+       struct snd_card_sb16 *acard = card->private_data;
        struct snd_opl3 *opl3;
        struct snd_hwdep *synth = NULL;
 #ifdef CONFIG_SND_SB16_CSP
@@ -373,54 +377,9 @@ static int __init snd_sb16_probe(int dev,
        unsigned long flags;
        int err;
 
-       card = snd_card_new(index[dev], id[dev], THIS_MODULE,
-                           sizeof(struct snd_card_sb16));
-       if (card == NULL)
-               return -ENOMEM;
-       acard = (struct snd_card_sb16 *) card->private_data;
-       card->private_free = snd_sb16_free;
-#ifdef CONFIG_PNP
-       if (isapnp[dev]) {
-               if ((err = snd_card_sb16_pnp(dev, acard, pcard, pid)))
-                       goto _err;
-               snd_card_set_dev(card, &pcard->card->dev);
-       }
-#endif
-
        xirq = irq[dev];
        xdma8 = dma8[dev];
        xdma16 = dma16[dev];
-       if (! is_isapnp_selected(dev)) {
-               if (xirq == SNDRV_AUTO_IRQ) {
-                       if ((xirq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
-                               snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
-                               err = -EBUSY;
-                               goto _err;
-                       }
-               }
-               if (xdma8 == SNDRV_AUTO_DMA) {
-                       if ((xdma8 = snd_legacy_find_free_dma(possible_dmas8)) < 0) {
-                               snd_printk(KERN_ERR PFX "unable to find a free 8-bit DMA\n");
-                               err = -EBUSY;
-                               goto _err;
-                       }
-               }
-               if (xdma16 == SNDRV_AUTO_DMA) {
-                       if ((xdma16 = snd_legacy_find_free_dma(possible_dmas16)) < 0) {
-                               snd_printk(KERN_ERR PFX "unable to find a free 16-bit DMA\n");
-                               err = -EBUSY;
-                               goto _err;
-                       }
-               }
-               /* non-PnP FM port address is hardwired with base port address */
-               fm_port[dev] = port[dev];
-               /* block the 0x388 port to avoid PnP conflicts */
-               acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
-#ifdef SNDRV_SBAWE_EMU8000
-               /* non-PnP AWE port address is hardwired with base port address */
-               awe_port[dev] = port[dev] + 0x400;
-#endif
-       }
 
        if ((err = snd_sbdsp_create(card,
                                    port[dev],
@@ -430,19 +389,19 @@ static int __init snd_sb16_probe(int dev,
                                    xdma16,
                                    SB_HW_AUTO,
                                    &chip)) < 0)
-               goto _err;
+               return err;
 
+       acard->chip = chip;
        if (chip->hardware != SB_HW_16) {
                snd_printk(KERN_ERR PFX "SB 16 chip was not detected at 0x%lx\n", port[dev]);
-               err = -ENODEV;
-               goto _err;
+               return -ENODEV;
        }
        chip->mpu_port = mpu_port[dev];
        if (! is_isapnp_selected(dev) && (err = snd_sb16dsp_configure(chip)) < 0)
-               goto _err;
+               return err;
 
-       if ((err = snd_sb16dsp_pcm(chip, 0, NULL)) < 0)
-               goto _err;
+       if ((err = snd_sb16dsp_pcm(chip, 0, &chip->pcm)) < 0)
+               return err;
 
        strcpy(card->driver,
 #ifdef SNDRV_SBAWE_EMU8000
@@ -464,7 +423,7 @@ static int __init snd_sb16_probe(int dev,
                if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_SB,
                                               chip->mpu_port, 0,
                                               xirq, 0, &chip->rmidi)) < 0)
-                       goto _err;
+                       return err;
                chip->rmidi_callback = snd_mpu401_uart_interrupt;
        }
 
@@ -487,12 +446,12 @@ static int __init snd_sb16_probe(int dev,
                        int seqdev = 1;
 #endif
                        if ((err = snd_opl3_hwdep_new(opl3, 0, seqdev, &synth)) < 0)
-                               goto _err;
+                               return err;
                }
        }
 
        if ((err = snd_sbmixer_new(chip)) < 0)
-               goto _err;
+               return err;
 
 #ifdef CONFIG_SND_SB16_CSP
        /* CSP chip on SB16ASP/AWE32 */
@@ -512,7 +471,7 @@ static int __init snd_sb16_probe(int dev,
                                           seq_ports[dev], NULL)) < 0) {
                        snd_printk(KERN_ERR PFX "fatal error - EMU-8000 synthesizer not detected at 0x%lx\n", awe_port[dev]);
 
-                       goto _err;
+                       return err;
                }
        }
 #endif
@@ -524,56 +483,168 @@ static int __init snd_sb16_probe(int dev,
                (mic_agc[dev] ? 0x00 : 0x01));
        spin_unlock_irqrestore(&chip->mixer_lock, flags);
 
-       if ((err = snd_card_set_generic_dev(card)) < 0)
-               goto _err;
-
        if ((err = snd_card_register(card)) < 0)
-               goto _err;
+               return err;
 
-       if (pcard)
-               pnp_set_card_drvdata(pcard, card);
-       else
-               snd_sb16_legacy[dev] = card;
        return 0;
+}
+
+#ifdef CONFIG_PM
+static int snd_sb16_suspend(struct snd_card *card, pm_message_t state)
+{
+       struct snd_card_sb16 *acard = card->private_data;
+       struct snd_sb *chip = acard->chip;
 
- _err:
-       snd_card_free(card);
-       return err;
+       snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+       snd_pcm_suspend_all(chip->pcm);
+       snd_sbmixer_suspend(chip);
+       return 0;
 }
 
-static int __init snd_sb16_probe_legacy_port(unsigned long xport)
+static int snd_sb16_resume(struct snd_card *card)
 {
-       static int dev;
-       int res;
+       struct snd_card_sb16 *acard = card->private_data;
+       struct snd_sb *chip = acard->chip;
 
-       for ( ; dev < SNDRV_CARDS; dev++) {
-               if (!enable[dev] || port[dev] != SNDRV_AUTO_PORT)
-                       continue;
-               if (is_isapnp_selected(dev))
-                       continue;
-               port[dev] = xport;
-               res = snd_sb16_probe(dev, NULL, NULL);
-               if (res < 0)
-                       port[dev] = SNDRV_AUTO_PORT;
-               return res;
+       snd_sbdsp_reset(chip);
+       snd_sbmixer_resume(chip);
+       snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+       return 0;
+}
+#endif
+
+static int __init snd_sb16_nonpnp_probe1(int dev, struct platform_device *devptr)
+{
+       struct snd_card_sb16 *acard;
+       struct snd_card *card;
+       int err;
+
+       card = snd_sb16_card_new(dev);
+       if (! card)
+               return -ENOMEM;
+
+       acard = card->private_data;
+       /* non-PnP FM port address is hardwired with base port address */
+       fm_port[dev] = port[dev];
+       /* block the 0x388 port to avoid PnP conflicts */
+       acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
+#ifdef SNDRV_SBAWE_EMU8000
+       /* non-PnP AWE port address is hardwired with base port address */
+       awe_port[dev] = port[dev] + 0x400;
+#endif
+
+       snd_card_set_dev(card, &devptr->dev);
+       if ((err = snd_sb16_probe(card, dev)) < 0) {
+               snd_card_free(card);
+               return err;
        }
-       return -ENODEV;
+       platform_set_drvdata(devptr, card);
+       return 0;
 }
 
+
+static int __init snd_sb16_nonpnp_probe(struct platform_device *pdev)
+{
+       int dev = pdev->id;
+       int err;
+       static int possible_irqs[] = {5, 9, 10, 7, -1};
+       static int possible_dmas8[] = {1, 3, 0, -1};
+       static int possible_dmas16[] = {5, 6, 7, -1};
+
+       if (irq[dev] == SNDRV_AUTO_IRQ) {
+               if ((irq[dev] = snd_legacy_find_free_irq(possible_irqs)) < 0) {
+                       snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
+                       return -EBUSY;
+               }
+       }
+       if (dma8[dev] == SNDRV_AUTO_DMA) {
+               if ((dma8[dev] = snd_legacy_find_free_dma(possible_dmas8)) < 0) {
+                       snd_printk(KERN_ERR PFX "unable to find a free 8-bit DMA\n");
+                       return -EBUSY;
+               }
+       }
+       if (dma16[dev] == SNDRV_AUTO_DMA) {
+               if ((dma16[dev] = snd_legacy_find_free_dma(possible_dmas16)) < 0) {
+                       snd_printk(KERN_ERR PFX "unable to find a free 16-bit DMA\n");
+                       return -EBUSY;
+               }
+       }
+
+       if (port[dev] != SNDRV_AUTO_PORT)
+               return snd_sb16_nonpnp_probe1(dev, pdev);
+       else {
+               static int possible_ports[] = {0x220, 0x240, 0x260, 0x280};
+               int i;
+               for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
+                       port[dev] = possible_ports[i];
+                       err = snd_sb16_nonpnp_probe1(dev, pdev);
+                       if (! err)
+                               return 0;
+               }
+               return err;
+       }
+}
+
+static int __devexit snd_sb16_nonpnp_remove(struct platform_device *devptr)
+{
+       snd_card_free(platform_get_drvdata(devptr));
+       platform_set_drvdata(devptr, NULL);
+       return 0;
+}
+
+#ifdef CONFIG_PM
+static int snd_sb16_nonpnp_suspend(struct platform_device *dev, pm_message_t state)
+{
+       return snd_sb16_suspend(platform_get_drvdata(dev), state);
+}
+
+static int snd_sb16_nonpnp_resume(struct platform_device *dev)
+{
+       return snd_sb16_resume(platform_get_drvdata(dev));
+}
+#endif
+
+#ifdef SNDRV_SBAWE
+#define SND_SB16_DRIVER        "snd_sbawe"
+#else
+#define SND_SB16_DRIVER        "snd_sb16"
+#endif
+
+static struct platform_driver snd_sb16_nonpnp_driver = {
+       .probe          = snd_sb16_nonpnp_probe,
+       .remove         = __devexit_p(snd_sb16_nonpnp_remove),
+#ifdef CONFIG_PM
+       .suspend        = snd_sb16_nonpnp_suspend,
+       .resume         = snd_sb16_nonpnp_resume,
+#endif
+       .driver         = {
+               .name   = SND_SB16_DRIVER
+       },
+};
+
+
 #ifdef CONFIG_PNP
 
-static int __devinit snd_sb16_pnp_detect(struct pnp_card_link *card,
-                                        const struct pnp_card_device_id *id)
+static int __devinit snd_sb16_pnp_detect(struct pnp_card_link *pcard,
+                                        const struct pnp_card_device_id *pid)
 {
        static int dev;
+       struct snd_card *card;
        int res;
 
        for ( ; dev < SNDRV_CARDS; dev++) {
                if (!enable[dev] || !isapnp[dev])
                        continue;
-               res = snd_sb16_probe(dev, card, id);
-               if (res < 0)
+               card = snd_sb16_card_new(dev);
+               if (! card)
+                       return -ENOMEM;
+               snd_card_set_dev(card, &pcard->card->dev);
+               if ((res = snd_card_sb16_pnp(dev, card->private_data, pcard, pid)) < 0 ||
+                   (res = snd_sb16_probe(card, dev)) < 0) {
+                       snd_card_free(card);
                        return res;
+               }
+               pnp_set_card_drvdata(pcard, card);
                dev++;
                return 0;
        }
@@ -583,50 +654,63 @@ static int __devinit snd_sb16_pnp_detect(struct pnp_card_link *card,
 
 static void __devexit snd_sb16_pnp_remove(struct pnp_card_link * pcard)
 {
-       struct snd_card *card = (struct snd_card *) pnp_get_card_drvdata(pcard);
+       snd_card_free(pnp_get_card_drvdata(pcard));
+       pnp_set_card_drvdata(pcard, NULL);
+}
 
-       snd_card_disconnect(card);
-       snd_card_free_in_thread(card);
+#ifdef CONFIG_PM
+static int snd_sb16_pnp_suspend(struct pnp_card_link *pcard, pm_message_t state)
+{
+       return snd_sb16_suspend(pnp_get_card_drvdata(pcard), state);
 }
+static int snd_sb16_pnp_resume(struct pnp_card_link *pcard)
+{
+       return snd_sb16_resume(pnp_get_card_drvdata(pcard));
+}
+#endif
 
 static struct pnp_card_driver sb16_pnpc_driver = {
        .flags = PNP_DRIVER_RES_DISABLE,
+#ifdef SNDRV_SBAWE
+       .name = "sbawe",
+#else
        .name = "sb16",
+#endif
        .id_table = snd_sb16_pnpids,
        .probe = snd_sb16_pnp_detect,
        .remove = __devexit_p(snd_sb16_pnp_remove),
+#ifdef CONFIG_PM
+       .suspend = snd_sb16_pnp_suspend,
+       .resume = snd_sb16_pnp_resume,
+#endif
 };
 
 #endif /* CONFIG_PNP */
 
 static int __init alsa_card_sb16_init(void)
 {
-       int dev, cards = 0, i;
-       static unsigned long possible_ports[] = {0x220, 0x240, 0x260, 0x280, -1};
+       int i, err, cards = 0;
 
-       /* legacy non-auto cards at first */
-       for (dev = 0; dev < SNDRV_CARDS; dev++) {
-               if (!enable[dev] || port[dev] == SNDRV_AUTO_PORT)
-                       continue;
-               if (is_isapnp_selected(dev))
-                       continue;
-               if (!snd_sb16_probe(dev, NULL, NULL)) {
-                       cards++;
+       if ((err = platform_driver_register(&snd_sb16_nonpnp_driver)) < 0)
+               return err;
+
+       for (i = 0; i < SNDRV_CARDS && enable[i]; i++) {
+               struct platform_device *device;
+               if (is_isapnp_selected(i))
                        continue;
+               device = platform_device_register_simple(SND_SB16_DRIVER,
+                                                        i, NULL, 0);
+               if (IS_ERR(device)) {
+                       err = PTR_ERR(device);
+                       platform_driver_unregister(&snd_sb16_nonpnp_driver);
+                       return err;
                }
-#ifdef MODULE
-               snd_printk(KERN_ERR "Sound Blaster 16+ soundcard #%i not found at 0x%lx or device busy\n", dev, port[dev]);
-#endif
+               cards++;
        }
-       /* legacy auto configured cards */
-       i = snd_legacy_auto_probe(possible_ports, snd_sb16_probe_legacy_port);
-       if (i > 0)
-               cards += i;
-
 #ifdef CONFIG_PNP
        /* PnP cards at last */
        i = pnp_register_card_driver(&sb16_pnpc_driver);
-       if (i >0)
+       if (i > 0)
                cards += i;
 #endif
 
@@ -634,6 +718,7 @@ static int __init alsa_card_sb16_init(void)
 #ifdef CONFIG_PNP
                pnp_unregister_card_driver(&sb16_pnpc_driver);
 #endif
+               platform_driver_unregister(&snd_sb16_nonpnp_driver);
 #ifdef MODULE
                snd_printk(KERN_ERR "Sound Blaster 16 soundcard not found or device busy\n");
 #ifdef SNDRV_SBAWE_EMU8000
@@ -649,14 +734,10 @@ static int __init alsa_card_sb16_init(void)
 
 static void __exit alsa_card_sb16_exit(void)
 {
-       int dev;
-
 #ifdef CONFIG_PNP
-       /* PnP cards first */
        pnp_unregister_card_driver(&sb16_pnpc_driver);
 #endif
-       for (dev = 0; dev < SNDRV_CARDS; dev++)
-               snd_card_free(snd_sb16_legacy[dev]);
+       platform_driver_unregister(&snd_sb16_nonpnp_driver);
 }
 
 module_init(alsa_card_sb16_init)