2006-06-21 07:42:43 -06:00
|
|
|
/*
|
|
|
|
* i2sbus driver
|
|
|
|
*
|
|
|
|
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
|
|
|
|
*
|
|
|
|
* GPL v2, can be found in COPYING.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/macio.h>
|
|
|
|
#include <asm/dbdma.h>
|
|
|
|
#include <linux/pci.h>
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <sound/driver.h>
|
|
|
|
#include <sound/core.h>
|
|
|
|
#include <linux/dma-mapping.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");
|
|
|
|
|
2006-07-10 05:44:34 -06:00
|
|
|
static int force;
|
|
|
|
module_param(force, int, 0444);
|
|
|
|
MODULE_PARM_DESC(force, "Force loading i2sbus even when"
|
|
|
|
" no layout-id property is present");
|
|
|
|
|
2006-06-21 07:42:43 -06:00
|
|
|
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 */
|
|
|
|
r->size = (numcmds+1) * 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=0;i<3;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=0;i<3;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 pt_regs *regs)
|
|
|
|
{
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 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;
|
|
|
|
int i;
|
|
|
|
static const char *rnames[] = { "i2sbus: %s (control)",
|
|
|
|
"i2sbus: %s (tx)",
|
|
|
|
"i2sbus: %s (rx)" };
|
|
|
|
static irqreturn_t (*ints[])(int irq, void *devid,
|
|
|
|
struct pt_regs *regs) = {
|
|
|
|
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) {
|
|
|
|
u32 *layout_id;
|
|
|
|
layout_id = (u32*) get_property(sound, "layout-id", NULL);
|
|
|
|
if (layout_id) {
|
|
|
|
snprintf(dev->sound.modalias, 32,
|
|
|
|
"sound-layout-%d", *layout_id);
|
|
|
|
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=0;i<3;i++) {
|
|
|
|
dev->interrupts[i] = -1;
|
|
|
|
snprintf(dev->rnames[i], sizeof(dev->rnames[i]), rnames[i], np->name);
|
|
|
|
}
|
|
|
|
for (i=0;i<3;i++) {
|
2006-07-10 05:44:33 -06:00
|
|
|
int irq = irq_of_parse_and_map(np, i);
|
|
|
|
if (request_irq(irq, ints[i], 0, dev->rnames[i], dev))
|
2006-06-21 07:42:43 -06:00
|
|
|
goto err;
|
2006-07-10 05:44:33 -06:00
|
|
|
dev->interrupts[i] = irq;
|
2006-06-21 07:42:43 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
for (i=0;i<3;i++) {
|
|
|
|
if (of_address_to_resource(np, i, &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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* should do sanity checking here about length of them */
|
|
|
|
dev->intfregs = ioremap(dev->resources[0].start,
|
|
|
|
dev->resources[0].end-dev->resources[0].start+1);
|
|
|
|
dev->out.dbdma = ioremap(dev->resources[1].start,
|
|
|
|
dev->resources[1].end-dev->resources[1].start+1);
|
|
|
|
dev->in.dbdma = ioremap(dev->resources[2].start,
|
|
|
|
dev->resources[2].end-dev->resources[2].start+1);
|
|
|
|
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);
|
|
|
|
/* Probably useless as we handle
|
|
|
|
* power transitions ourselves */
|
|
|
|
snd_power_change_state(i2sdev->sound.pcm->card,
|
|
|
|
SNDRV_CTL_POWER_D3hot);
|
|
|
|
}
|
|
|
|
/* 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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
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) {
|
|
|
|
/* 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;
|
|
|
|
}
|
|
|
|
/* Notify Alsa */
|
|
|
|
if (i2sdev->sound.pcm) {
|
|
|
|
/* Same comment as above, probably useless */
|
|
|
|
snd_power_change_state(i2sdev->sound.pcm->card,
|
|
|
|
SNDRV_CTL_POWER_D0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
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);
|