[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / aoa / soundbus / i2sbus / i2sbus-core.c

/*
 * 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/driver.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");
/* for auto-loading, declare that we handle this weird
 * string that macio puts into the relevant device */
MODULE_ALIAS("of:Ni2sTi2sC");

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" },
	{ }
};

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 = 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;
	int i, layout = 0, rlen;
	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 = get_property(sound, "layout-id", NULL);
		if (layout_id) {
			layout = *layout_id;
			snprintf(dev->sound.modalias, 32,
				 "sound-layout-%d", layout);
			force = 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 (!force) {
		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 (device_is_compatible(np, "i2sbus") ||
		    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);
Commit	Line	Data
f3d9478b JB	1	/*
	2	* i2sbus driver
	3	*
	4	* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
	5	*
	6	* GPL v2, can be found in COPYING.
	7	*/
	8
	9	#include <linux/module.h>
f3d9478b JB	10	#include <linux/pci.h>
f3d9478b JB	11	#include <linux/interrupt.h>
389ba795 BH	12	#include <linux/dma-mapping.h>
389ba795 BH	13
f3d9478b JB	14	#include <sound/driver.h>
f3d9478b JB	15	#include <sound/core.h>
389ba795 BH	16
	17	#include <asm/macio.h>
	18	#include <asm/dbdma.h>
	19
f3d9478b JB	20	#include "../soundbus.h"
	21	#include "i2sbus.h"
	22
	23	MODULE_LICENSE("GPL");
	24	MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
	25	MODULE_DESCRIPTION("Apple Soundbus: I2S support");
	26	/* for auto-loading, declare that we handle this weird
	27	* string that macio puts into the relevant device */
	28	MODULE_ALIAS("of:Ni2sTi2sC");
	29
f9d08de5 BH	30	static int force;
	31	module_param(force, int, 0444);
	32	MODULE_PARM_DESC(force, "Force loading i2sbus even when"
	33	" no layout-id property is present");
	34
f3d9478b JB	35	static struct of_device_id i2sbus_match[] = {
	36	{ .name = "i2s" },
	37	{ }
	38	};
	39
	40	static int alloc_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev,
	41	struct dbdma_command_mem *r,
	42	int numcmds)
	43	{
547ac2ae PM	44	/* one more for rounding, one for branch back, one for stop command */
547ac2ae PM	45	r->size = (numcmds + 3) * sizeof(struct dbdma_cmd);
f3d9478b JB	46	/* We use the PCI APIs for now until the generic one gets fixed
	47	* enough or until we get some macio-specific versions
	48	*/
	49	r->space = dma_alloc_coherent(
	50	&macio_get_pci_dev(i2sdev->macio)->dev,
	51	r->size,
	52	&r->bus_addr,
	53	GFP_KERNEL);
	54
	55	if (!r->space) return -ENOMEM;
	56
	57	memset(r->space, 0, r->size);
	58	r->cmds = (void*)DBDMA_ALIGN(r->space);
	59	r->bus_cmd_start = r->bus_addr +
	60	(dma_addr_t)((char)r->cmds - (char)r->space);
	61
	62	return 0;
	63	}
	64
	65	static void free_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev,
	66	struct dbdma_command_mem *r)
	67	{
	68	if (!r->space) return;
	69
	70	dma_free_coherent(&macio_get_pci_dev(i2sdev->macio)->dev,
	71	r->size, r->space, r->bus_addr);
	72	}
	73
	74	static void i2sbus_release_dev(struct device *dev)
	75	{
	76	struct i2sbus_dev *i2sdev;
	77	int i;
	78
	79	i2sdev = container_of(dev, struct i2sbus_dev, sound.ofdev.dev);
	80
	81	if (i2sdev->intfregs) iounmap(i2sdev->intfregs);
	82	if (i2sdev->out.dbdma) iounmap(i2sdev->out.dbdma);
	83	if (i2sdev->in.dbdma) iounmap(i2sdev->in.dbdma);
389ba795	84	for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++)
f3d9478b JB	85	if (i2sdev->allocated_resource[i])
	86	release_and_free_resource(i2sdev->allocated_resource[i]);
	87	free_dbdma_descriptor_ring(i2sdev, &i2sdev->out.dbdma_ring);
	88	free_dbdma_descriptor_ring(i2sdev, &i2sdev->in.dbdma_ring);
389ba795	89	for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++)
f3d9478b JB	90	free_irq(i2sdev->interrupts[i], i2sdev);
	91	i2sbus_control_remove_dev(i2sdev->control, i2sdev);
	92	mutex_destroy(&i2sdev->lock);
	93	kfree(i2sdev);
	94	}
	95
7d12e780	96	static irqreturn_t i2sbus_bus_intr(int irq, void *devid)
f3d9478b JB	97	{
	98	struct i2sbus_dev *dev = devid;
	99	u32 intreg;
	100
	101	spin_lock(&dev->low_lock);
	102	intreg = in_le32(&dev->intfregs->intr_ctl);
	103
	104	/* acknowledge interrupt reasons */
	105	out_le32(&dev->intfregs->intr_ctl, intreg);
	106
	107	spin_unlock(&dev->low_lock);
	108
	109	return IRQ_HANDLED;
	110	}
	111
389ba795 BH	112
	113	/*
	114	* XXX FIXME: We test the layout_id's here to get the proper way of
	115	* mapping in various registers, thanks to bugs in Apple device-trees.
	116	* We could instead key off the machine model and the name of the i2s
	117	* node (i2s-a). This we'll do when we move it all to macio_asic.c
	118	* and have that export items for each sub-node too.
	119	*/
	120	static int i2sbus_get_and_fixup_rsrc(struct device_node *np, int index,
	121	int layout, struct resource *res)
	122	{
	123	struct device_node *parent;
	124	int pindex, rc = -ENXIO;
a7edd0e6	125	const u32 *reg;
389ba795 BH	126
	127	/* Machines with layout 76 and 36 (K2 based) have a weird device
	128	* tree what we need to special case.
	129	* Normal machines just fetch the resource from the i2s-X node.
	130	* Darwin further divides normal machines into old and new layouts
	131	* with a subtely different code path but that doesn't seem necessary
	132	* in practice, they just bloated it. In addition, even on our K2
	133	* case the i2s-modem node, if we ever want to handle it, uses the
	134	* normal layout
	135	*/
	136	if (layout != 76 && layout != 36)
	137	return of_address_to_resource(np, index, res);
	138
	139	parent = of_get_parent(np);
	140	pindex = (index == aoa_resource_i2smmio) ? 0 : 1;
	141	rc = of_address_to_resource(parent, pindex, res);
	142	if (rc)
	143	goto bail;
a7edd0e6	144	reg = get_property(np, "reg", NULL);
389ba795 BH	145	if (reg == NULL) {
	146	rc = -ENXIO;
	147	goto bail;
	148	}
	149	res->start += reg[index * 2];
	150	res->end = res->start + reg[index * 2 + 1] - 1;
	151	bail:
	152	of_node_put(parent);
	153	return rc;
	154	}
	155
f3d9478b JB	156	/* FIXME: look at device node refcounting */
	157	static int i2sbus_add_dev(struct macio_dev *macio,
	158	struct i2sbus_control *control,
	159	struct device_node *np)
	160	{
	161	struct i2sbus_dev *dev;
	162	struct device_node child = NULL, sound = NULL;
389ba795 BH	163	struct resource *r;
389ba795 BH	164	int i, layout = 0, rlen;
f3d9478b JB	165	static const char *rnames[] = { "i2sbus: %s (control)",
	166	"i2sbus: %s (tx)",
	167	"i2sbus: %s (rx)" };
7d12e780	168	static irq_handler_t ints[] = {
f3d9478b JB	169	i2sbus_bus_intr,
	170	i2sbus_tx_intr,
	171	i2sbus_rx_intr
	172	};
	173
	174	if (strlen(np->name) != 5)
	175	return 0;
	176	if (strncmp(np->name, "i2s-", 4))
	177	return 0;
	178
f3d9478b JB	179	dev = kzalloc(sizeof(struct i2sbus_dev), GFP_KERNEL);
	180	if (!dev)
	181	return 0;
	182
	183	i = 0;
	184	while ((child = of_get_next_child(np, child))) {
	185	if (strcmp(child->name, "sound") == 0) {
	186	i++;
	187	sound = child;
	188	}
	189	}
	190	if (i == 1) {
a7edd0e6	191	const u32 *layout_id = get_property(sound, "layout-id", NULL);
f3d9478b	192	if (layout_id) {
389ba795	193	layout = *layout_id;
f3d9478b	194	snprintf(dev->sound.modalias, 32,
389ba795	195	"sound-layout-%d", layout);
f3d9478b JB	196	force = 1;
	197	}
	198	}
	199	/* for the time being, until we can handle non-layout-id
	200	* things in some fabric, refuse to attach if there is no
	201	* layout-id property or we haven't been forced to attach.
	202	* When there are two i2s busses and only one has a layout-id,
	203	* then this depends on the order, but that isn't important
	204	* either as the second one in that case is just a modem. */
	205	if (!force) {
	206	kfree(dev);
	207	return -ENODEV;
	208	}
	209
	210	mutex_init(&dev->lock);
	211	spin_lock_init(&dev->low_lock);
	212	dev->sound.ofdev.node = np;
	213	dev->sound.ofdev.dma_mask = macio->ofdev.dma_mask;
	214	dev->sound.ofdev.dev.dma_mask = &dev->sound.ofdev.dma_mask;
	215	dev->sound.ofdev.dev.parent = &macio->ofdev.dev;
	216	dev->sound.ofdev.dev.release = i2sbus_release_dev;
	217	dev->sound.attach_codec = i2sbus_attach_codec;
	218	dev->sound.detach_codec = i2sbus_detach_codec;
	219	dev->sound.pcmid = -1;
	220	dev->macio = macio;
	221	dev->control = control;
	222	dev->bus_number = np->name[4] - 'a';
	223	INIT_LIST_HEAD(&dev->sound.codec_list);
	224
389ba795	225	for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) {
f3d9478b	226	dev->interrupts[i] = -1;
389ba795 BH	227	snprintf(dev->rnames[i], sizeof(dev->rnames[i]),
389ba795 BH	228	rnames[i], np->name);
f3d9478b	229	}
389ba795	230	for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) {
4a14cf45 AS	231	int irq = irq_of_parse_and_map(np, i);
4a14cf45 AS	232	if (request_irq(irq, ints[i], 0, dev->rnames[i], dev))
f3d9478b	233	goto err;
4a14cf45	234	dev->interrupts[i] = irq;
f3d9478b JB	235	}
f3d9478b JB	236
389ba795 BH	237
	238	/* Resource handling is problematic as some device-trees contain
	239	* useless crap (ugh ugh ugh). We work around that here by calling
	240	* specific functions for calculating the appropriate resources.
	241	*
	242	* This will all be moved to macio_asic.c at one point
	243	*/
	244	for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) {
	245	if (i2sbus_get_and_fixup_rsrc(np,i,layout,&dev->resources[i]))
f3d9478b	246	goto err;
389ba795	247	/* If only we could use our resource dev->resources[i]...
f3d9478b	248	* but request_resource doesn't know about parents and
389ba795 BH	249	* contained resources...
389ba795 BH	250	*/
f3d9478b JB	251	dev->allocated_resource[i] =
	252	request_mem_region(dev->resources[i].start,
	253	dev->resources[i].end -
	254	dev->resources[i].start + 1,
	255	dev->rnames[i]);
	256	if (!dev->allocated_resource[i]) {
	257	printk(KERN_ERR "i2sbus: failed to claim resource %d!\n", i);
	258	goto err;
	259	}
	260	}
389ba795 BH	261
	262	r = &dev->resources[aoa_resource_i2smmio];
	263	rlen = r->end - r->start + 1;
	264	if (rlen < sizeof(struct i2s_interface_regs))
	265	goto err;
	266	dev->intfregs = ioremap(r->start, rlen);
	267
	268	r = &dev->resources[aoa_resource_txdbdma];
	269	rlen = r->end - r->start + 1;
	270	if (rlen < sizeof(struct dbdma_regs))
	271	goto err;
	272	dev->out.dbdma = ioremap(r->start, rlen);
	273
	274	r = &dev->resources[aoa_resource_rxdbdma];
	275	rlen = r->end - r->start + 1;
	276	if (rlen < sizeof(struct dbdma_regs))
	277	goto err;
	278	dev->in.dbdma = ioremap(r->start, rlen);
	279
f3d9478b JB	280	if (!dev->intfregs \|\| !dev->out.dbdma \|\| !dev->in.dbdma)
	281	goto err;
	282
	283	if (alloc_dbdma_descriptor_ring(dev, &dev->out.dbdma_ring,
	284	MAX_DBDMA_COMMANDS))
	285	goto err;
	286	if (alloc_dbdma_descriptor_ring(dev, &dev->in.dbdma_ring,
	287	MAX_DBDMA_COMMANDS))
	288	goto err;
	289
	290	if (i2sbus_control_add_dev(dev->control, dev)) {
	291	printk(KERN_ERR "i2sbus: control layer didn't like bus\n");
	292	goto err;
	293	}
	294
	295	if (soundbus_add_one(&dev->sound)) {
	296	printk(KERN_DEBUG "i2sbus: device registration error!\n");
	297	goto err;
	298	}
	299
	300	/* enable this cell */
	301	i2sbus_control_cell(dev->control, dev, 1);
	302	i2sbus_control_enable(dev->control, dev);
	303	i2sbus_control_clock(dev->control, dev, 1);
	304
	305	return 1;
	306	err:
	307	for (i=0;i<3;i++)
	308	if (dev->interrupts[i] != -1)
	309	free_irq(dev->interrupts[i], dev);
	310	free_dbdma_descriptor_ring(dev, &dev->out.dbdma_ring);
	311	free_dbdma_descriptor_ring(dev, &dev->in.dbdma_ring);
	312	if (dev->intfregs) iounmap(dev->intfregs);
	313	if (dev->out.dbdma) iounmap(dev->out.dbdma);
	314	if (dev->in.dbdma) iounmap(dev->in.dbdma);
	315	for (i=0;i<3;i++)
	316	if (dev->allocated_resource[i])
	317	release_and_free_resource(dev->allocated_resource[i]);
	318	mutex_destroy(&dev->lock);
	319	kfree(dev);
	320	return 0;
	321	}
	322
	323	static int i2sbus_probe(struct macio_dev* dev, const struct of_device_id *match)
	324	{
	325	struct device_node *np = NULL;
	326	int got = 0, err;
	327	struct i2sbus_control *control = NULL;
	328
	329	err = i2sbus_control_init(dev, &control);
	330	if (err)
	331	return err;
	332	if (!control) {
	333	printk(KERN_ERR "i2sbus_control_init API breakage\n");
	334	return -ENODEV;
	335	}
	336
	337	while ((np = of_get_next_child(dev->ofdev.node, np))) {
	338	if (device_is_compatible(np, "i2sbus") \|\|
	339	device_is_compatible(np, "i2s-modem")) {
	340	got += i2sbus_add_dev(dev, control, np);
	341	}
	342	}
	343
344	if (!got) {
345	/* found none, clean up */
346	i2sbus_control_destroy(control);
347	return -ENODEV;
348	}
349
350	dev->ofdev.dev.driver_data = control;
351
352	return 0;
353	}
354
355	static int i2sbus_remove(struct macio_dev* dev)
356	{
357	struct i2sbus_control *control = dev->ofdev.dev.driver_data;
358	struct i2sbus_dev i2sdev, tmp;
359
360	list_for_each_entry_safe(i2sdev, tmp, &control->list, item)
361	soundbus_remove_one(&i2sdev->sound);
362
363	return 0;
364	}
365
366	#ifdef CONFIG_PM
367	static int i2sbus_suspend(struct macio_dev* dev, pm_message_t state)
368	{
369	struct i2sbus_control *control = dev->ofdev.dev.driver_data;
370	struct codec_info_item *cii;
371	struct i2sbus_dev* i2sdev;
372	int err, ret = 0;
373
374	list_for_each_entry(i2sdev, &control->list, item) {
375	/* Notify Alsa */
376	if (i2sdev->sound.pcm) {
377	/* Suspend PCM streams */
378	snd_pcm_suspend_all(i2sdev->sound.pcm);
f3d9478b	379	}
547ac2ae	380
f3d9478b JB	381	/* Notify codecs */
	382	list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {
	383	err = 0;
	384	if (cii->codec->suspend)
	385	err = cii->codec->suspend(cii, state);
	386	if (err)
	387	ret = err;
	388	}
547ac2ae PM	389
	390	/* wait until streams are stopped */
	391	i2sbus_wait_for_stop_both(i2sdev);
f3d9478b	392	}
547ac2ae	393
f3d9478b JB	394	return ret;
	395	}
	396
	397	static int i2sbus_resume(struct macio_dev* dev)
	398	{
	399	struct i2sbus_control *control = dev->ofdev.dev.driver_data;
	400	struct codec_info_item *cii;
	401	struct i2sbus_dev* i2sdev;
	402	int err, ret = 0;
	403
	404	list_for_each_entry(i2sdev, &control->list, item) {
547ac2ae PM	405	/* reset i2s bus format etc. */
	406	i2sbus_pcm_prepare_both(i2sdev);
	407
f3d9478b JB	408	/* Notify codecs so they can re-initialize */
	409	list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {
	410	err = 0;
	411	if (cii->codec->resume)
	412	err = cii->codec->resume(cii);
	413	if (err)
	414	ret = err;
	415	}
f3d9478b JB	416	}
	417
	418	return ret;
	419	}
	420	#endif /* CONFIG_PM */
	421
	422	static int i2sbus_shutdown(struct macio_dev* dev)
	423	{
	424	return 0;
	425	}
	426
	427	static struct macio_driver i2sbus_drv = {
	428	.name = "soundbus-i2s",
	429	.owner = THIS_MODULE,
	430	.match_table = i2sbus_match,
	431	.probe = i2sbus_probe,
	432	.remove = i2sbus_remove,
	433	#ifdef CONFIG_PM
	434	.suspend = i2sbus_suspend,
	435	.resume = i2sbus_resume,
	436	#endif
	437	.shutdown = i2sbus_shutdown,
	438	};
	439
	440	static int __init soundbus_i2sbus_init(void)
	441	{
	442	return macio_register_driver(&i2sbus_drv);
	443	}
	444
	445	static void __exit soundbus_i2sbus_exit(void)
	446	{
	447	macio_unregister_driver(&i2sbus_drv);
	448	}
	449
	450	module_init(soundbus_i2sbus_init);
	451	module_exit(soundbus_i2sbus_exit);