Merge branch 'topic/aoa' into to-push
authorTakashi Iwai <tiwai@suse.de>
Thu, 25 Dec 2008 10:40:24 +0000 (11:40 +0100)
committerTakashi Iwai <tiwai@suse.de>
Thu, 25 Dec 2008 10:40:24 +0000 (11:40 +0100)
1  2 
sound/aoa/soundbus/i2sbus/core.c

index 0000000000000000000000000000000000000000,d1b5cff92499d68e954763fe2b10dd856ccaffbd..be468edf3ecb990ba68b4117808a2ebdf55472ce
mode 000000,100644..100644
--- /dev/null
@@@ -1,0 -1,450 +1,450 @@@
 -      int i, layout = 0, rlen;
+ /*
+  * i2sbus driver
+  *
+  * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+  *
+  * GPL v2, can be found in COPYING.
+  */
+ #include <linux/module.h>
+ #include <linux/pci.h>
+ #include <linux/interrupt.h>
+ #include <linux/dma-mapping.h>
+ #include <sound/core.h>
+ #include <asm/macio.h>
+ #include <asm/dbdma.h>
+ #include "../soundbus.h"
+ #include "i2sbus.h"
+ MODULE_LICENSE("GPL");
+ MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
+ MODULE_DESCRIPTION("Apple Soundbus: I2S support");
+ static int force;
+ module_param(force, int, 0444);
+ MODULE_PARM_DESC(force, "Force loading i2sbus even when"
+                       " no layout-id property is present");
+ static struct of_device_id i2sbus_match[] = {
+       { .name = "i2s" },
+       { }
+ };
+ MODULE_DEVICE_TABLE(of, i2sbus_match);
+ static int alloc_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev,
+                                      struct dbdma_command_mem *r,
+                                      int numcmds)
+ {
+       /* one more for rounding, one for branch back, one for stop command */
+       r->size = (numcmds + 3) * sizeof(struct dbdma_cmd);
+       /* We use the PCI APIs for now until the generic one gets fixed
+        * enough or until we get some macio-specific versions
+        */
+       r->space = dma_alloc_coherent(
+                       &macio_get_pci_dev(i2sdev->macio)->dev,
+                       r->size,
+                       &r->bus_addr,
+                       GFP_KERNEL);
+       if (!r->space) return -ENOMEM;
+       memset(r->space, 0, r->size);
+       r->cmds = (void*)DBDMA_ALIGN(r->space);
+       r->bus_cmd_start = r->bus_addr +
+                          (dma_addr_t)((char*)r->cmds - (char*)r->space);
+       return 0;
+ }
+ static void free_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev,
+                                      struct dbdma_command_mem *r)
+ {
+       if (!r->space) return;
+       dma_free_coherent(&macio_get_pci_dev(i2sdev->macio)->dev,
+                           r->size, r->space, r->bus_addr);
+ }
+ static void i2sbus_release_dev(struct device *dev)
+ {
+       struct i2sbus_dev *i2sdev;
+       int i;
+       i2sdev = container_of(dev, struct i2sbus_dev, sound.ofdev.dev);
+       if (i2sdev->intfregs) iounmap(i2sdev->intfregs);
+       if (i2sdev->out.dbdma) iounmap(i2sdev->out.dbdma);
+       if (i2sdev->in.dbdma) iounmap(i2sdev->in.dbdma);
+       for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++)
+               if (i2sdev->allocated_resource[i])
+                       release_and_free_resource(i2sdev->allocated_resource[i]);
+       free_dbdma_descriptor_ring(i2sdev, &i2sdev->out.dbdma_ring);
+       free_dbdma_descriptor_ring(i2sdev, &i2sdev->in.dbdma_ring);
+       for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++)
+               free_irq(i2sdev->interrupts[i], i2sdev);
+       i2sbus_control_remove_dev(i2sdev->control, i2sdev);
+       mutex_destroy(&i2sdev->lock);
+       kfree(i2sdev);
+ }
+ static irqreturn_t i2sbus_bus_intr(int irq, void *devid)
+ {
+       struct i2sbus_dev *dev = devid;
+       u32 intreg;
+       spin_lock(&dev->low_lock);
+       intreg = in_le32(&dev->intfregs->intr_ctl);
+       /* acknowledge interrupt reasons */
+       out_le32(&dev->intfregs->intr_ctl, intreg);
+       spin_unlock(&dev->low_lock);
+       return IRQ_HANDLED;
+ }
+ /*
+  * XXX FIXME: We test the layout_id's here to get the proper way of
+  * mapping in various registers, thanks to bugs in Apple device-trees.
+  * We could instead key off the machine model and the name of the i2s
+  * node (i2s-a). This we'll do when we move it all to macio_asic.c
+  * and have that export items for each sub-node too.
+  */
+ static int i2sbus_get_and_fixup_rsrc(struct device_node *np, int index,
+                                    int layout, struct resource *res)
+ {
+       struct device_node *parent;
+       int pindex, rc = -ENXIO;
+       const u32 *reg;
+       /* Machines with layout 76 and 36 (K2 based) have a weird device
+        * tree what we need to special case.
+        * Normal machines just fetch the resource from the i2s-X node.
+        * Darwin further divides normal machines into old and new layouts
+        * with a subtely different code path but that doesn't seem necessary
+        * in practice, they just bloated it. In addition, even on our K2
+        * case the i2s-modem node, if we ever want to handle it, uses the
+        * normal layout
+        */
+       if (layout != 76 && layout != 36)
+               return of_address_to_resource(np, index, res);
+       parent = of_get_parent(np);
+       pindex = (index == aoa_resource_i2smmio) ? 0 : 1;
+       rc = of_address_to_resource(parent, pindex, res);
+       if (rc)
+               goto bail;
+       reg = of_get_property(np, "reg", NULL);
+       if (reg == NULL) {
+               rc = -ENXIO;
+               goto bail;
+       }
+       res->start += reg[index * 2];
+       res->end = res->start + reg[index * 2 + 1] - 1;
+  bail:
+       of_node_put(parent);
+       return rc;
+ }
+ /* FIXME: look at device node refcounting */
+ static int i2sbus_add_dev(struct macio_dev *macio,
+                         struct i2sbus_control *control,
+                         struct device_node *np)
+ {
+       struct i2sbus_dev *dev;
+       struct device_node *child = NULL, *sound = NULL;
+       struct resource *r;
 -                      force = 1;
++      int i, layout = 0, rlen, ok = force;
+       static const char *rnames[] = { "i2sbus: %s (control)",
+                                       "i2sbus: %s (tx)",
+                                       "i2sbus: %s (rx)" };
+       static irq_handler_t ints[] = {
+               i2sbus_bus_intr,
+               i2sbus_tx_intr,
+               i2sbus_rx_intr
+       };
+       if (strlen(np->name) != 5)
+               return 0;
+       if (strncmp(np->name, "i2s-", 4))
+               return 0;
+       dev = kzalloc(sizeof(struct i2sbus_dev), GFP_KERNEL);
+       if (!dev)
+               return 0;
+       i = 0;
+       while ((child = of_get_next_child(np, child))) {
+               if (strcmp(child->name, "sound") == 0) {
+                       i++;
+                       sound = child;
+               }
+       }
+       if (i == 1) {
+               const u32 *layout_id =
+                       of_get_property(sound, "layout-id", NULL);
+               if (layout_id) {
+                       layout = *layout_id;
+                       snprintf(dev->sound.modalias, 32,
+                                "sound-layout-%d", layout);
 -      if (!force) {
++                      ok = 1;
+               }
+       }
+       /* for the time being, until we can handle non-layout-id
+        * things in some fabric, refuse to attach if there is no
+        * layout-id property or we haven't been forced to attach.
+        * When there are two i2s busses and only one has a layout-id,
+        * then this depends on the order, but that isn't important
+        * either as the second one in that case is just a modem. */
++      if (!ok) {
+               kfree(dev);
+               return -ENODEV;
+       }
+       mutex_init(&dev->lock);
+       spin_lock_init(&dev->low_lock);
+       dev->sound.ofdev.node = np;
+       dev->sound.ofdev.dma_mask = macio->ofdev.dma_mask;
+       dev->sound.ofdev.dev.dma_mask = &dev->sound.ofdev.dma_mask;
+       dev->sound.ofdev.dev.parent = &macio->ofdev.dev;
+       dev->sound.ofdev.dev.release = i2sbus_release_dev;
+       dev->sound.attach_codec = i2sbus_attach_codec;
+       dev->sound.detach_codec = i2sbus_detach_codec;
+       dev->sound.pcmid = -1;
+       dev->macio = macio;
+       dev->control = control;
+       dev->bus_number = np->name[4] - 'a';
+       INIT_LIST_HEAD(&dev->sound.codec_list);
+       for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) {
+               dev->interrupts[i] = -1;
+               snprintf(dev->rnames[i], sizeof(dev->rnames[i]),
+                        rnames[i], np->name);
+       }
+       for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) {
+               int irq = irq_of_parse_and_map(np, i);
+               if (request_irq(irq, ints[i], 0, dev->rnames[i], dev))
+                       goto err;
+               dev->interrupts[i] = irq;
+       }
+       /* Resource handling is problematic as some device-trees contain
+        * useless crap (ugh ugh ugh). We work around that here by calling
+        * specific functions for calculating the appropriate resources.
+        *
+        * This will all be moved to macio_asic.c at one point
+        */
+       for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) {
+               if (i2sbus_get_and_fixup_rsrc(np,i,layout,&dev->resources[i]))
+                       goto err;
+               /* If only we could use our resource dev->resources[i]...
+                * but request_resource doesn't know about parents and
+                * contained resources...
+                */
+               dev->allocated_resource[i] =
+                       request_mem_region(dev->resources[i].start,
+                                          dev->resources[i].end -
+                                          dev->resources[i].start + 1,
+                                          dev->rnames[i]);
+               if (!dev->allocated_resource[i]) {
+                       printk(KERN_ERR "i2sbus: failed to claim resource %d!\n", i);
+                       goto err;
+               }
+       }
+       r = &dev->resources[aoa_resource_i2smmio];
+       rlen = r->end - r->start + 1;
+       if (rlen < sizeof(struct i2s_interface_regs))
+               goto err;
+       dev->intfregs = ioremap(r->start, rlen);
+       r = &dev->resources[aoa_resource_txdbdma];
+       rlen = r->end - r->start + 1;
+       if (rlen < sizeof(struct dbdma_regs))
+               goto err;
+       dev->out.dbdma = ioremap(r->start, rlen);
+       r = &dev->resources[aoa_resource_rxdbdma];
+       rlen = r->end - r->start + 1;
+       if (rlen < sizeof(struct dbdma_regs))
+               goto err;
+       dev->in.dbdma = ioremap(r->start, rlen);
+       if (!dev->intfregs || !dev->out.dbdma || !dev->in.dbdma)
+               goto err;
+       if (alloc_dbdma_descriptor_ring(dev, &dev->out.dbdma_ring,
+                                       MAX_DBDMA_COMMANDS))
+               goto err;
+       if (alloc_dbdma_descriptor_ring(dev, &dev->in.dbdma_ring,
+                                       MAX_DBDMA_COMMANDS))
+               goto err;
+       if (i2sbus_control_add_dev(dev->control, dev)) {
+               printk(KERN_ERR "i2sbus: control layer didn't like bus\n");
+               goto err;
+       }
+       if (soundbus_add_one(&dev->sound)) {
+               printk(KERN_DEBUG "i2sbus: device registration error!\n");
+               goto err;
+       }
+       /* enable this cell */
+       i2sbus_control_cell(dev->control, dev, 1);
+       i2sbus_control_enable(dev->control, dev);
+       i2sbus_control_clock(dev->control, dev, 1);
+       return 1;
+  err:
+       for (i=0;i<3;i++)
+               if (dev->interrupts[i] != -1)
+                       free_irq(dev->interrupts[i], dev);
+       free_dbdma_descriptor_ring(dev, &dev->out.dbdma_ring);
+       free_dbdma_descriptor_ring(dev, &dev->in.dbdma_ring);
+       if (dev->intfregs) iounmap(dev->intfregs);
+       if (dev->out.dbdma) iounmap(dev->out.dbdma);
+       if (dev->in.dbdma) iounmap(dev->in.dbdma);
+       for (i=0;i<3;i++)
+               if (dev->allocated_resource[i])
+                       release_and_free_resource(dev->allocated_resource[i]);
+       mutex_destroy(&dev->lock);
+       kfree(dev);
+       return 0;
+ }
+ static int i2sbus_probe(struct macio_dev* dev, const struct of_device_id *match)
+ {
+       struct device_node *np = NULL;
+       int got = 0, err;
+       struct i2sbus_control *control = NULL;
+       err = i2sbus_control_init(dev, &control);
+       if (err)
+               return err;
+       if (!control) {
+               printk(KERN_ERR "i2sbus_control_init API breakage\n");
+               return -ENODEV;
+       }
+       while ((np = of_get_next_child(dev->ofdev.node, np))) {
+               if (of_device_is_compatible(np, "i2sbus") ||
+                   of_device_is_compatible(np, "i2s-modem")) {
+                       got += i2sbus_add_dev(dev, control, np);
+               }
+       }
+       if (!got) {
+               /* found none, clean up */
+               i2sbus_control_destroy(control);
+               return -ENODEV;
+       }
+       dev->ofdev.dev.driver_data = control;
+       return 0;
+ }
+ static int i2sbus_remove(struct macio_dev* dev)
+ {
+       struct i2sbus_control *control = dev->ofdev.dev.driver_data;
+       struct i2sbus_dev *i2sdev, *tmp;
+       list_for_each_entry_safe(i2sdev, tmp, &control->list, item)
+               soundbus_remove_one(&i2sdev->sound);
+       return 0;
+ }
+ #ifdef CONFIG_PM
+ static int i2sbus_suspend(struct macio_dev* dev, pm_message_t state)
+ {
+       struct i2sbus_control *control = dev->ofdev.dev.driver_data;
+       struct codec_info_item *cii;
+       struct i2sbus_dev* i2sdev;
+       int err, ret = 0;
+       list_for_each_entry(i2sdev, &control->list, item) {
+               /* Notify Alsa */
+               if (i2sdev->sound.pcm) {
+                       /* Suspend PCM streams */
+                       snd_pcm_suspend_all(i2sdev->sound.pcm);
+               }
+               /* Notify codecs */
+               list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {
+                       err = 0;
+                       if (cii->codec->suspend)
+                               err = cii->codec->suspend(cii, state);
+                       if (err)
+                               ret = err;
+               }
+               /* wait until streams are stopped */
+               i2sbus_wait_for_stop_both(i2sdev);
+       }
+       return ret;
+ }
+ static int i2sbus_resume(struct macio_dev* dev)
+ {
+       struct i2sbus_control *control = dev->ofdev.dev.driver_data;
+       struct codec_info_item *cii;
+       struct i2sbus_dev* i2sdev;
+       int err, ret = 0;
+       list_for_each_entry(i2sdev, &control->list, item) {
+               /* reset i2s bus format etc. */
+               i2sbus_pcm_prepare_both(i2sdev);
+               /* Notify codecs so they can re-initialize */
+               list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {
+                       err = 0;
+                       if (cii->codec->resume)
+                               err = cii->codec->resume(cii);
+                       if (err)
+                               ret = err;
+               }
+       }
+       return ret;
+ }
+ #endif /* CONFIG_PM */
+ static int i2sbus_shutdown(struct macio_dev* dev)
+ {
+       return 0;
+ }
+ static struct macio_driver i2sbus_drv = {
+       .name = "soundbus-i2s",
+       .owner = THIS_MODULE,
+       .match_table = i2sbus_match,
+       .probe = i2sbus_probe,
+       .remove = i2sbus_remove,
+ #ifdef CONFIG_PM
+       .suspend = i2sbus_suspend,
+       .resume = i2sbus_resume,
+ #endif
+       .shutdown = i2sbus_shutdown,
+ };
+ static int __init soundbus_i2sbus_init(void)
+ {
+       return macio_register_driver(&i2sbus_drv);
+ }
+ static void __exit soundbus_i2sbus_exit(void)
+ {
+       macio_unregister_driver(&i2sbus_drv);
+ }
+ module_init(soundbus_i2sbus_init);
+ module_exit(soundbus_i2sbus_exit);