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authorJohannes Berg <johannes@sipsolutions.net>2006-06-21 15:42:43 +0200
committerJaroslav Kysela <perex@suse.cz>2006-06-22 21:34:38 +0200
commitf3d9478b2ce468c3115b02ecae7e975990697f15 (patch)
tree8397671cbf251c54bf539016468164e08d0c45ee /sound/aoa/soundbus
parent[ALSA] hda-codec - Use 3stack model for ASUS P5RD2-VM / P5GPL-X SE (diff)
downloadlinux-dev-f3d9478b2ce468c3115b02ecae7e975990697f15.tar.xz
linux-dev-f3d9478b2ce468c3115b02ecae7e975990697f15.zip
[ALSA] snd-aoa: add snd-aoa
This large patch adds all of snd-aoa. Consisting of many modules, it currently replaces snd-powermac for all layout-id based machines and handles many more (for example new powerbooks and powermacs with digital output that previously couldn't be used at all). It also has support for all layout-IDs that Apple has (judging from their Info.plist file) but not all are tested. The driver currently has 2 known regressions over snd-powermac: * it doesn't handle powermac 7,2 and 7,3 * it doesn't have a DRC control on snapper-based machines I will fix those during the 2.6.18 development cycle. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/aoa/soundbus')
-rw-r--r--sound/aoa/soundbus/Kconfig14
-rw-r--r--sound/aoa/soundbus/Makefile3
-rw-r--r--sound/aoa/soundbus/core.c250
-rw-r--r--sound/aoa/soundbus/i2sbus/Makefile2
-rw-r--r--sound/aoa/soundbus/i2sbus/i2sbus-control.c192
-rw-r--r--sound/aoa/soundbus/i2sbus/i2sbus-control.h37
-rw-r--r--sound/aoa/soundbus/i2sbus/i2sbus-core.c387
-rw-r--r--sound/aoa/soundbus/i2sbus/i2sbus-interface.h187
-rw-r--r--sound/aoa/soundbus/i2sbus/i2sbus-pcm.c1021
-rw-r--r--sound/aoa/soundbus/i2sbus/i2sbus.h112
-rw-r--r--sound/aoa/soundbus/soundbus.h202
-rw-r--r--sound/aoa/soundbus/sysfs.c43
12 files changed, 2450 insertions, 0 deletions
diff --git a/sound/aoa/soundbus/Kconfig b/sound/aoa/soundbus/Kconfig
new file mode 100644
index 000000000000..d532d27a9f54
--- /dev/null
+++ b/sound/aoa/soundbus/Kconfig
@@ -0,0 +1,14 @@
+config SND_AOA_SOUNDBUS
+ tristate "Apple Soundbus support"
+ depends on SOUND && SND_PCM && EXPERIMENTAL
+ ---help---
+ This option enables the generic driver for the soundbus
+ support on Apple machines.
+
+ It is required for the sound bus implementations.
+
+config SND_AOA_SOUNDBUS_I2S
+ tristate "I2S bus support"
+ depends on SND_AOA_SOUNDBUS && PCI
+ ---help---
+ This option enables support for Apple I2S busses.
diff --git a/sound/aoa/soundbus/Makefile b/sound/aoa/soundbus/Makefile
new file mode 100644
index 000000000000..0e61f5aa06b5
--- /dev/null
+++ b/sound/aoa/soundbus/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_SND_AOA_SOUNDBUS) += snd-aoa-soundbus.o
+snd-aoa-soundbus-objs := core.o sysfs.o
+obj-$(CONFIG_SND_AOA_SOUNDBUS_I2S) += i2sbus/
diff --git a/sound/aoa/soundbus/core.c b/sound/aoa/soundbus/core.c
new file mode 100644
index 000000000000..abe84a76c835
--- /dev/null
+++ b/sound/aoa/soundbus/core.c
@@ -0,0 +1,250 @@
+/*
+ * soundbus
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+
+#include <linux/module.h>
+#include "soundbus.h"
+
+MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Apple Soundbus");
+
+struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev)
+{
+ struct device *tmp;
+
+ if (!dev)
+ return NULL;
+ tmp = get_device(&dev->ofdev.dev);
+ if (tmp)
+ return to_soundbus_device(tmp);
+ else
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(soundbus_dev_get);
+
+void soundbus_dev_put(struct soundbus_dev *dev)
+{
+ if (dev)
+ put_device(&dev->ofdev.dev);
+}
+EXPORT_SYMBOL_GPL(soundbus_dev_put);
+
+static int soundbus_probe(struct device *dev)
+{
+ int error = -ENODEV;
+ struct soundbus_driver *drv;
+ struct soundbus_dev *soundbus_dev;
+
+ drv = to_soundbus_driver(dev->driver);
+ soundbus_dev = to_soundbus_device(dev);
+
+ if (!drv->probe)
+ return error;
+
+ soundbus_dev_get(soundbus_dev);
+
+ error = drv->probe(soundbus_dev);
+ if (error)
+ soundbus_dev_put(soundbus_dev);
+
+ return error;
+}
+
+
+static int soundbus_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
+{
+ struct soundbus_dev * soundbus_dev;
+ struct of_device * of;
+ char *scratch, *compat, *compat2;
+ int i = 0;
+ int length, cplen, cplen2, seen = 0;
+
+ if (!dev)
+ return -ENODEV;
+
+ soundbus_dev = to_soundbus_device(dev);
+ if (!soundbus_dev)
+ return -ENODEV;
+
+ of = &soundbus_dev->ofdev;
+
+ /* stuff we want to pass to /sbin/hotplug */
+ envp[i++] = scratch = buffer;
+ length = scnprintf (scratch, buffer_size, "OF_NAME=%s", of->node->name);
+ ++length;
+ buffer_size -= length;
+ if ((buffer_size <= 0) || (i >= num_envp))
+ return -ENOMEM;
+ scratch += length;
+
+ envp[i++] = scratch;
+ length = scnprintf (scratch, buffer_size, "OF_TYPE=%s", of->node->type);
+ ++length;
+ buffer_size -= length;
+ if ((buffer_size <= 0) || (i >= num_envp))
+ return -ENOMEM;
+ scratch += length;
+
+ /* Since the compatible field can contain pretty much anything
+ * it's not really legal to split it out with commas. We split it
+ * up using a number of environment variables instead. */
+
+ compat = (char *) get_property(of->node, "compatible", &cplen);
+ compat2 = compat;
+ cplen2= cplen;
+ while (compat && cplen > 0) {
+ envp[i++] = scratch;
+ length = scnprintf (scratch, buffer_size,
+ "OF_COMPATIBLE_%d=%s", seen, compat);
+ ++length;
+ buffer_size -= length;
+ if ((buffer_size <= 0) || (i >= num_envp))
+ return -ENOMEM;
+ scratch += length;
+ length = strlen (compat) + 1;
+ compat += length;
+ cplen -= length;
+ seen++;
+ }
+
+ envp[i++] = scratch;
+ length = scnprintf (scratch, buffer_size, "OF_COMPATIBLE_N=%d", seen);
+ ++length;
+ buffer_size -= length;
+ if ((buffer_size <= 0) || (i >= num_envp))
+ return -ENOMEM;
+ scratch += length;
+
+ envp[i++] = scratch;
+ length = scnprintf (scratch, buffer_size, "MODALIAS=%s",
+ soundbus_dev->modalias);
+
+ buffer_size -= length;
+ if ((buffer_size <= 0) || (i >= num_envp))
+ return -ENOMEM;
+
+ envp[i] = NULL;
+
+ return 0;
+}
+
+static int soundbus_device_remove(struct device *dev)
+{
+ struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
+ struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
+
+ if (dev->driver && drv->remove)
+ drv->remove(soundbus_dev);
+ soundbus_dev_put(soundbus_dev);
+
+ return 0;
+}
+
+static void soundbus_device_shutdown(struct device *dev)
+{
+ struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
+ struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
+
+ if (dev->driver && drv->shutdown)
+ drv->shutdown(soundbus_dev);
+}
+
+#ifdef CONFIG_PM
+
+static int soundbus_device_suspend(struct device *dev, pm_message_t state)
+{
+ struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
+ struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
+
+ if (dev->driver && drv->suspend)
+ return drv->suspend(soundbus_dev, state);
+ return 0;
+}
+
+static int soundbus_device_resume(struct device * dev)
+{
+ struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
+ struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
+
+ if (dev->driver && drv->resume)
+ return drv->resume(soundbus_dev);
+ return 0;
+}
+
+#endif /* CONFIG_PM */
+
+extern struct device_attribute soundbus_dev_attrs[];
+
+static struct bus_type soundbus_bus_type = {
+ .name = "aoa-soundbus",
+ .probe = soundbus_probe,
+ .uevent = soundbus_uevent,
+ .remove = soundbus_device_remove,
+ .shutdown = soundbus_device_shutdown,
+#ifdef CONFIG_PM
+ .suspend = soundbus_device_suspend,
+ .resume = soundbus_device_resume,
+#endif
+ .dev_attrs = soundbus_dev_attrs,
+};
+
+static int __init soundbus_init(void)
+{
+ return bus_register(&soundbus_bus_type);
+}
+
+static void __exit soundbus_exit(void)
+{
+ bus_unregister(&soundbus_bus_type);
+}
+
+int soundbus_add_one(struct soundbus_dev *dev)
+{
+ static int devcount;
+
+ /* sanity checks */
+ if (!dev->attach_codec ||
+ !dev->ofdev.node ||
+ dev->pcmname ||
+ dev->pcmid != -1) {
+ printk(KERN_ERR "soundbus: adding device failed sanity check!\n");
+ return -EINVAL;
+ }
+
+ snprintf(dev->ofdev.dev.bus_id, BUS_ID_SIZE, "soundbus:%x", ++devcount);
+ dev->ofdev.dev.bus = &soundbus_bus_type;
+ return of_device_register(&dev->ofdev);
+}
+EXPORT_SYMBOL_GPL(soundbus_add_one);
+
+void soundbus_remove_one(struct soundbus_dev *dev)
+{
+ of_device_unregister(&dev->ofdev);
+}
+EXPORT_SYMBOL_GPL(soundbus_remove_one);
+
+int soundbus_register_driver(struct soundbus_driver *drv)
+{
+ /* initialize common driver fields */
+ drv->driver.name = drv->name;
+ drv->driver.bus = &soundbus_bus_type;
+
+ /* register with core */
+ return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(soundbus_register_driver);
+
+void soundbus_unregister_driver(struct soundbus_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(soundbus_unregister_driver);
+
+module_init(soundbus_init);
+module_exit(soundbus_exit);
diff --git a/sound/aoa/soundbus/i2sbus/Makefile b/sound/aoa/soundbus/i2sbus/Makefile
new file mode 100644
index 000000000000..e57a5cf65655
--- /dev/null
+++ b/sound/aoa/soundbus/i2sbus/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SND_AOA_SOUNDBUS_I2S) += snd-aoa-i2sbus.o
+snd-aoa-i2sbus-objs := i2sbus-core.o i2sbus-pcm.o i2sbus-control.o
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-control.c b/sound/aoa/soundbus/i2sbus/i2sbus-control.c
new file mode 100644
index 000000000000..f50407952d3c
--- /dev/null
+++ b/sound/aoa/soundbus/i2sbus/i2sbus-control.c
@@ -0,0 +1,192 @@
+/*
+ * i2sbus driver -- bus control routines
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <asm/prom.h>
+#include <asm/macio.h>
+#include <asm/pmac_feature.h>
+#include <asm/pmac_pfunc.h>
+#include "i2sbus.h"
+
+int i2sbus_control_init(struct macio_dev* dev, struct i2sbus_control **c)
+{
+ *c = kzalloc(sizeof(struct i2sbus_control), GFP_KERNEL);
+ if (!*c)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&(*c)->list);
+
+ if (of_address_to_resource(dev->ofdev.node, 0, &(*c)->rsrc))
+ goto err;
+ /* we really should be using feature calls instead of mapping
+ * these registers. It's safe for now since no one else is
+ * touching them... */
+ (*c)->controlregs = ioremap((*c)->rsrc.start,
+ sizeof(struct i2s_control_regs));
+ if (!(*c)->controlregs)
+ goto err;
+
+ return 0;
+ err:
+ kfree(*c);
+ *c = NULL;
+ return -ENODEV;
+}
+
+void i2sbus_control_destroy(struct i2sbus_control *c)
+{
+ iounmap(c->controlregs);
+ kfree(c);
+}
+
+/* this is serialised externally */
+int i2sbus_control_add_dev(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev)
+{
+ struct device_node *np;
+
+ np = i2sdev->sound.ofdev.node;
+ i2sdev->enable = pmf_find_function(np, "enable");
+ i2sdev->cell_enable = pmf_find_function(np, "cell-enable");
+ i2sdev->clock_enable = pmf_find_function(np, "clock-enable");
+ i2sdev->cell_disable = pmf_find_function(np, "cell-disable");
+ i2sdev->clock_disable = pmf_find_function(np, "clock-disable");
+
+ /* if the bus number is not 0 or 1 we absolutely need to use
+ * the platform functions -- there's nothing in Darwin that
+ * would allow seeing a system behind what the FCRs are then,
+ * and I don't want to go parsing a bunch of platform functions
+ * by hand to try finding a system... */
+ if (i2sdev->bus_number != 0 && i2sdev->bus_number != 1 &&
+ (!i2sdev->enable ||
+ !i2sdev->cell_enable || !i2sdev->clock_enable ||
+ !i2sdev->cell_disable || !i2sdev->clock_disable)) {
+ pmf_put_function(i2sdev->enable);
+ pmf_put_function(i2sdev->cell_enable);
+ pmf_put_function(i2sdev->clock_enable);
+ pmf_put_function(i2sdev->cell_disable);
+ pmf_put_function(i2sdev->clock_disable);
+ return -ENODEV;
+ }
+
+ list_add(&i2sdev->item, &c->list);
+
+ return 0;
+}
+
+void i2sbus_control_remove_dev(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev)
+{
+ /* this is serialised externally */
+ list_del(&i2sdev->item);
+ if (list_empty(&c->list))
+ i2sbus_control_destroy(c);
+}
+
+int i2sbus_control_enable(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev)
+{
+ struct pmf_args args = { .count = 0 };
+ int cc;
+
+ if (i2sdev->enable)
+ return pmf_call_one(i2sdev->enable, &args);
+
+ switch (i2sdev->bus_number) {
+ case 0:
+ cc = in_le32(&c->controlregs->cell_control);
+ out_le32(&c->controlregs->cell_control, cc | CTRL_CLOCK_INTF_0_ENABLE);
+ break;
+ case 1:
+ cc = in_le32(&c->controlregs->cell_control);
+ out_le32(&c->controlregs->cell_control, cc | CTRL_CLOCK_INTF_1_ENABLE);
+ break;
+ default:
+ return -ENODEV;
+ }
+ return 0;
+}
+
+int i2sbus_control_cell(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev,
+ int enable)
+{
+ struct pmf_args args = { .count = 0 };
+ int cc;
+
+ switch (enable) {
+ case 0:
+ if (i2sdev->cell_disable)
+ return pmf_call_one(i2sdev->cell_disable, &args);
+ break;
+ case 1:
+ if (i2sdev->cell_enable)
+ return pmf_call_one(i2sdev->cell_enable, &args);
+ break;
+ default:
+ printk(KERN_ERR "i2sbus: INVALID CELL ENABLE VALUE\n");
+ return -ENODEV;
+ }
+ switch (i2sdev->bus_number) {
+ case 0:
+ cc = in_le32(&c->controlregs->cell_control);
+ cc &= ~CTRL_CLOCK_CELL_0_ENABLE;
+ cc |= enable * CTRL_CLOCK_CELL_0_ENABLE;
+ out_le32(&c->controlregs->cell_control, cc);
+ break;
+ case 1:
+ cc = in_le32(&c->controlregs->cell_control);
+ cc &= ~CTRL_CLOCK_CELL_1_ENABLE;
+ cc |= enable * CTRL_CLOCK_CELL_1_ENABLE;
+ out_le32(&c->controlregs->cell_control, cc);
+ break;
+ default:
+ return -ENODEV;
+ }
+ return 0;
+}
+
+int i2sbus_control_clock(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev,
+ int enable)
+{
+ struct pmf_args args = { .count = 0 };
+ int cc;
+
+ switch (enable) {
+ case 0:
+ if (i2sdev->clock_disable)
+ return pmf_call_one(i2sdev->clock_disable, &args);
+ break;
+ case 1:
+ if (i2sdev->clock_enable)
+ return pmf_call_one(i2sdev->clock_enable, &args);
+ break;
+ default:
+ printk(KERN_ERR "i2sbus: INVALID CLOCK ENABLE VALUE\n");
+ return -ENODEV;
+ }
+ switch (i2sdev->bus_number) {
+ case 0:
+ cc = in_le32(&c->controlregs->cell_control);
+ cc &= ~CTRL_CLOCK_CLOCK_0_ENABLE;
+ cc |= enable * CTRL_CLOCK_CLOCK_0_ENABLE;
+ out_le32(&c->controlregs->cell_control, cc);
+ break;
+ case 1:
+ cc = in_le32(&c->controlregs->cell_control);
+ cc &= ~CTRL_CLOCK_CLOCK_1_ENABLE;
+ cc |= enable * CTRL_CLOCK_CLOCK_1_ENABLE;
+ out_le32(&c->controlregs->cell_control, cc);
+ break;
+ default:
+ return -ENODEV;
+ }
+ return 0;
+}
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-control.h b/sound/aoa/soundbus/i2sbus/i2sbus-control.h
new file mode 100644
index 000000000000..bb05550f730b
--- /dev/null
+++ b/sound/aoa/soundbus/i2sbus/i2sbus-control.h
@@ -0,0 +1,37 @@
+/*
+ * i2sbus driver -- bus register definitions
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+#ifndef __I2SBUS_CONTROLREGS_H
+#define __I2SBUS_CONTROLREGS_H
+
+/* i2s control registers, at least what we know about them */
+
+#define __PAD(m,n) u8 __pad##m[n]
+#define _PAD(line, n) __PAD(line, n)
+#define PAD(n) _PAD(__LINE__, (n))
+struct i2s_control_regs {
+ PAD(0x38);
+ __le32 fcr0; /* 0x38 (unknown) */
+ __le32 cell_control; /* 0x3c (fcr1) */
+ __le32 fcr2; /* 0x40 (unknown) */
+ __le32 fcr3; /* 0x44 (fcr3) */
+ __le32 clock_control; /* 0x48 (unknown) */
+ PAD(4);
+ /* total size: 0x50 bytes */
+} __attribute__((__packed__));
+
+#define CTRL_CLOCK_CELL_0_ENABLE (1<<10)
+#define CTRL_CLOCK_CLOCK_0_ENABLE (1<<12)
+#define CTRL_CLOCK_SWRESET_0 (1<<11)
+#define CTRL_CLOCK_INTF_0_ENABLE (1<<13)
+
+#define CTRL_CLOCK_CELL_1_ENABLE (1<<17)
+#define CTRL_CLOCK_CLOCK_1_ENABLE (1<<18)
+#define CTRL_CLOCK_SWRESET_1 (1<<19)
+#define CTRL_CLOCK_INTF_1_ENABLE (1<<20)
+
+#endif /* __I2SBUS_CONTROLREGS_H */
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-core.c b/sound/aoa/soundbus/i2sbus/i2sbus-core.c
new file mode 100644
index 000000000000..f268dacdaa00
--- /dev/null
+++ b/sound/aoa/soundbus/i2sbus/i2sbus-core.c
@@ -0,0 +1,387 @@
+/*
+ * 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");
+
+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;
+}
+
+static int force;
+module_param(force, int, 0444);
+MODULE_PARM_DESC(force, "Force loading i2sbus even when"
+ " no layout-id property is present");
+
+/* 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;
+
+ if (np->n_intrs != 3)
+ 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++) {
+ if (request_irq(np->intrs[i].line, ints[i], 0, dev->rnames[i], dev))
+ goto err;
+ dev->interrupts[i] = np->intrs[i].line;
+ }
+
+ 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);
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-interface.h b/sound/aoa/soundbus/i2sbus/i2sbus-interface.h
new file mode 100644
index 000000000000..c6b5f5452d20
--- /dev/null
+++ b/sound/aoa/soundbus/i2sbus/i2sbus-interface.h
@@ -0,0 +1,187 @@
+/*
+ * i2sbus driver -- interface register definitions
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+#ifndef __I2SBUS_INTERFACE_H
+#define __I2SBUS_INTERFACE_H
+
+/* i2s bus control registers, at least what we know about them */
+
+#define __PAD(m,n) u8 __pad##m[n]
+#define _PAD(line, n) __PAD(line, n)
+#define PAD(n) _PAD(__LINE__, (n))
+struct i2s_interface_regs {
+ __le32 intr_ctl; /* 0x00 */
+ PAD(12);
+ __le32 serial_format; /* 0x10 */
+ PAD(12);
+ __le32 codec_msg_out; /* 0x20 */
+ PAD(12);
+ __le32 codec_msg_in; /* 0x30 */
+ PAD(12);
+ __le32 frame_count; /* 0x40 */
+ PAD(12);
+ __le32 frame_match; /* 0x50 */
+ PAD(12);
+ __le32 data_word_sizes; /* 0x60 */
+ PAD(12);
+ __le32 peak_level_sel; /* 0x70 */
+ PAD(12);
+ __le32 peak_level_in0; /* 0x80 */
+ PAD(12);
+ __le32 peak_level_in1; /* 0x90 */
+ PAD(12);
+ /* total size: 0x100 bytes */
+} __attribute__((__packed__));
+
+/* interrupt register is just a bitfield with
+ * interrupt enable and pending bits */
+#define I2S_REG_INTR_CTL 0x00
+# define I2S_INT_FRAME_COUNT (1<<31)
+# define I2S_PENDING_FRAME_COUNT (1<<30)
+# define I2S_INT_MESSAGE_FLAG (1<<29)
+# define I2S_PENDING_MESSAGE_FLAG (1<<28)
+# define I2S_INT_NEW_PEAK (1<<27)
+# define I2S_PENDING_NEW_PEAK (1<<26)
+# define I2S_INT_CLOCKS_STOPPED (1<<25)
+# define I2S_PENDING_CLOCKS_STOPPED (1<<24)
+# define I2S_INT_EXTERNAL_SYNC_ERROR (1<<23)
+# define I2S_PENDING_EXTERNAL_SYNC_ERROR (1<<22)
+# define I2S_INT_EXTERNAL_SYNC_OK (1<<21)
+# define I2S_PENDING_EXTERNAL_SYNC_OK (1<<20)
+# define I2S_INT_NEW_SAMPLE_RATE (1<<19)
+# define I2S_PENDING_NEW_SAMPLE_RATE (1<<18)
+# define I2S_INT_STATUS_FLAG (1<<17)
+# define I2S_PENDING_STATUS_FLAG (1<<16)
+
+/* serial format register is more interesting :)
+ * It contains:
+ * - clock source
+ * - MClk divisor
+ * - SClk divisor
+ * - SClk master flag
+ * - serial format (sony, i2s 64x, i2s 32x, dav, silabs)
+ * - external sample frequency interrupt (don't understand)
+ * - external sample frequency
+ */
+#define I2S_REG_SERIAL_FORMAT 0x10
+/* clock source. You get either 18.432, 45.1584 or 49.1520 MHz */
+# define I2S_SF_CLOCK_SOURCE_SHIFT 30
+# define I2S_SF_CLOCK_SOURCE_MASK (3<<I2S_SF_CLOCK_SOURCE_SHIFT)
+# define I2S_SF_CLOCK_SOURCE_18MHz (0<<I2S_SF_CLOCK_SOURCE_SHIFT)
+# define I2S_SF_CLOCK_SOURCE_45MHz (1<<I2S_SF_CLOCK_SOURCE_SHIFT)
+# define I2S_SF_CLOCK_SOURCE_49MHz (2<<I2S_SF_CLOCK_SOURCE_SHIFT)
+/* also, let's define the exact clock speeds here, in Hz */
+#define I2S_CLOCK_SPEED_18MHz 18432000
+#define I2S_CLOCK_SPEED_45MHz 45158400
+#define I2S_CLOCK_SPEED_49MHz 49152000
+/* MClk is the clock that drives the codec, usually called its 'system clock'.
+ * It is derived by taking only every 'divisor' tick of the clock.
+ */
+# define I2S_SF_MCLKDIV_SHIFT 24
+# define I2S_SF_MCLKDIV_MASK (0x1F<<I2S_SF_MCLKDIV_SHIFT)
+# define I2S_SF_MCLKDIV_1 (0x14<<I2S_SF_MCLKDIV_SHIFT)
+# define I2S_SF_MCLKDIV_3 (0x13<<I2S_SF_MCLKDIV_SHIFT)
+# define I2S_SF_MCLKDIV_5 (0x12<<I2S_SF_MCLKDIV_SHIFT)
+# define I2S_SF_MCLKDIV_14 (0x0E<<I2S_SF_MCLKDIV_SHIFT)
+# define I2S_SF_MCLKDIV_OTHER(div) (((div/2-1)<<I2S_SF_MCLKDIV_SHIFT)&I2S_SF_MCLKDIV_MASK)
+static inline int i2s_sf_mclkdiv(int div, int *out)
+{
+ int d;
+
+ switch(div) {
+ case 1: *out |= I2S_SF_MCLKDIV_1; return 0;
+ case 3: *out |= I2S_SF_MCLKDIV_3; return 0;
+ case 5: *out |= I2S_SF_MCLKDIV_5; return 0;
+ case 14: *out |= I2S_SF_MCLKDIV_14; return 0;
+ default:
+ if (div%2) return -1;
+ d = div/2-1;
+ if (d == 0x14 || d == 0x13 || d == 0x12 || d == 0x0E)
+ return -1;
+ *out |= I2S_SF_MCLKDIV_OTHER(div);
+ return 0;
+ }
+}
+/* SClk is the clock that drives the i2s wire bus. Note that it is
+ * derived from the MClk above by taking only every 'divisor' tick
+ * of MClk.
+ */
+# define I2S_SF_SCLKDIV_SHIFT 20
+# define I2S_SF_SCLKDIV_MASK (0xF<<I2S_SF_SCLKDIV_SHIFT)
+# define I2S_SF_SCLKDIV_1 (8<<I2S_SF_SCLKDIV_SHIFT)
+# define I2S_SF_SCLKDIV_3 (9<<I2S_SF_SCLKDIV_SHIFT)
+# define I2S_SF_SCLKDIV_OTHER(div) (((div/2-1)<<I2S_SF_SCLKDIV_SHIFT)&I2S_SF_SCLKDIV_MASK)
+static inline int i2s_sf_sclkdiv(int div, int *out)
+{
+ int d;
+
+ switch(div) {
+ case 1: *out |= I2S_SF_SCLKDIV_1; return 0;
+ case 3: *out |= I2S_SF_SCLKDIV_3; return 0;
+ default:
+ if (div%2) return -1;
+ d = div/2-1;
+ if (d == 8 || d == 9) return -1;
+ *out |= I2S_SF_SCLKDIV_OTHER(div);
+ return 0;
+ }
+}
+# define I2S_SF_SCLK_MASTER (1<<19)
+/* serial format is the way the data is put to the i2s wire bus */
+# define I2S_SF_SERIAL_FORMAT_SHIFT 16
+# define I2S_SF_SERIAL_FORMAT_MASK (7<<I2S_SF_SERIAL_FORMAT_SHIFT)
+# define I2S_SF_SERIAL_FORMAT_SONY (0<<I2S_SF_SERIAL_FORMAT_SHIFT)
+# define I2S_SF_SERIAL_FORMAT_I2S_64X (1<<I2S_SF_SERIAL_FORMAT_SHIFT)
+# define I2S_SF_SERIAL_FORMAT_I2S_32X (2<<I2S_SF_SERIAL_FORMAT_SHIFT)
+# define I2S_SF_SERIAL_FORMAT_I2S_DAV (4<<I2S_SF_SERIAL_FORMAT_SHIFT)
+# define I2S_SF_SERIAL_FORMAT_I2S_SILABS (5<<I2S_SF_SERIAL_FORMAT_SHIFT)
+/* unknown */
+# define I2S_SF_EXT_SAMPLE_FREQ_INT_SHIFT 12
+# define I2S_SF_EXT_SAMPLE_FREQ_INT_MASK (0xF<<I2S_SF_SAMPLE_FREQ_INT_SHIFT)
+/* probably gives external frequency? */
+# define I2S_SF_EXT_SAMPLE_FREQ_MASK 0xFFF
+
+/* used to send codec messages, but how isn't clear */
+#define I2S_REG_CODEC_MSG_OUT 0x20
+
+/* used to receive codec messages, but how isn't clear */
+#define I2S_REG_CODEC_MSG_IN 0x30
+
+/* frame count reg isn't clear to me yet, but probably useful */
+#define I2S_REG_FRAME_COUNT 0x40
+
+/* program to some value, and get interrupt if frame count reaches it */
+#define I2S_REG_FRAME_MATCH 0x50
+
+/* this register describes how the bus transfers data */
+#define I2S_REG_DATA_WORD_SIZES 0x60
+/* number of interleaved input channels */
+# define I2S_DWS_NUM_CHANNELS_IN_SHIFT 24
+# define I2S_DWS_NUM_CHANNELS_IN_MASK (0x1F<<I2S_DWS_NUM_CHANNELS_IN_SHIFT)
+/* word size of input data */
+# define I2S_DWS_DATA_IN_SIZE_SHIFT 16
+# define I2S_DWS_DATA_IN_16BIT (0<<I2S_DWS_DATA_IN_SIZE_SHIFT)
+# define I2S_DWS_DATA_IN_24BIT (3<<I2S_DWS_DATA_IN_SIZE_SHIFT)
+/* number of interleaved output channels */
+# define I2S_DWS_NUM_CHANNELS_OUT_SHIFT 8
+# define I2S_DWS_NUM_CHANNELS_OUT_MASK (0x1F<<I2S_DWS_NUM_CHANNELS_OUT_SHIFT)
+/* word size of output data */
+# define I2S_DWS_DATA_OUT_SIZE_SHIFT 0
+# define I2S_DWS_DATA_OUT_16BIT (0<<I2S_DWS_DATA_OUT_SIZE_SHIFT)
+# define I2S_DWS_DATA_OUT_24BIT (3<<I2S_DWS_DATA_OUT_SIZE_SHIFT)
+
+
+/* unknown */
+#define I2S_REG_PEAK_LEVEL_SEL 0x70
+
+/* unknown */
+#define I2S_REG_PEAK_LEVEL_IN0 0x80
+
+/* unknown */
+#define I2S_REG_PEAK_LEVEL_IN1 0x90
+
+#endif /* __I2SBUS_INTERFACE_H */
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c b/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c
new file mode 100644
index 000000000000..3049015a04f1
--- /dev/null
+++ b/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c
@@ -0,0 +1,1021 @@
+/*
+ * i2sbus driver -- pcm routines
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+
+#include <asm/io.h>
+#include <linux/delay.h>
+/* So apparently there's a reason for requiring driver.h
+ * to be included first, even if I don't know it... */
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <asm/macio.h>
+#include <linux/pci.h>
+#include "../soundbus.h"
+#include "i2sbus.h"
+
+static inline void get_pcm_info(struct i2sbus_dev *i2sdev, int in,
+ struct pcm_info **pi, struct pcm_info **other)
+{
+ if (in) {
+ if (pi)
+ *pi = &i2sdev->in;
+ if (other)
+ *other = &i2sdev->out;
+ } else {
+ if (pi)
+ *pi = &i2sdev->out;
+ if (other)
+ *other = &i2sdev->in;
+ }
+}
+
+static int clock_and_divisors(int mclk, int sclk, int rate, int *out)
+{
+ /* sclk must be derived from mclk! */
+ if (mclk % sclk)
+ return -1;
+ /* derive sclk register value */
+ if (i2s_sf_sclkdiv(mclk / sclk, out))
+ return -1;
+
+ if (I2S_CLOCK_SPEED_18MHz % (rate * mclk) == 0) {
+ if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_18MHz / (rate * mclk), out)) {
+ *out |= I2S_SF_CLOCK_SOURCE_18MHz;
+ return 0;
+ }
+ }
+ if (I2S_CLOCK_SPEED_45MHz % (rate * mclk) == 0) {
+ if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_45MHz / (rate * mclk), out)) {
+ *out |= I2S_SF_CLOCK_SOURCE_45MHz;
+ return 0;
+ }
+ }
+ if (I2S_CLOCK_SPEED_49MHz % (rate * mclk) == 0) {
+ if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_49MHz / (rate * mclk), out)) {
+ *out |= I2S_SF_CLOCK_SOURCE_49MHz;
+ return 0;
+ }
+ }
+ return -1;
+}
+
+#define CHECK_RATE(rate) \
+ do { if (rates & SNDRV_PCM_RATE_ ##rate) { \
+ int dummy; \
+ if (clock_and_divisors(sysclock_factor, \
+ bus_factor, rate, &dummy)) \
+ rates &= ~SNDRV_PCM_RATE_ ##rate; \
+ } } while (0)
+
+static int i2sbus_pcm_open(struct i2sbus_dev *i2sdev, int in)
+{
+ struct pcm_info *pi, *other;
+ struct soundbus_dev *sdev;
+ int masks_inited = 0, err;
+ struct codec_info_item *cii, *rev;
+ struct snd_pcm_hardware *hw;
+ u64 formats = 0;
+ unsigned int rates = 0;
+ struct transfer_info v;
+ int result = 0;
+ int bus_factor = 0, sysclock_factor = 0;
+ int found_this;
+
+ mutex_lock(&i2sdev->lock);
+
+ get_pcm_info(i2sdev, in, &pi, &other);
+
+ hw = &pi->substream->runtime->hw;
+ sdev = &i2sdev->sound;
+
+ if (pi->active) {
+ /* alsa messed up */
+ result = -EBUSY;
+ goto out_unlock;
+ }
+
+ /* we now need to assign the hw */
+ list_for_each_entry(cii, &sdev->codec_list, list) {
+ struct transfer_info *ti = cii->codec->transfers;
+ bus_factor = cii->codec->bus_factor;
+ sysclock_factor = cii->codec->sysclock_factor;
+ while (ti->formats && ti->rates) {
+ v = *ti;
+ if (ti->transfer_in == in
+ && cii->codec->usable(cii, ti, &v)) {
+ if (masks_inited) {
+ formats &= v.formats;
+ rates &= v.rates;
+ } else {
+ formats = v.formats;
+ rates = v.rates;
+ masks_inited = 1;
+ }
+ }
+ ti++;
+ }
+ }
+ if (!masks_inited || !bus_factor || !sysclock_factor) {
+ result = -ENODEV;
+ goto out_unlock;
+ }
+ /* bus dependent stuff */
+ hw->info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_RESUME;
+
+ CHECK_RATE(5512);
+ CHECK_RATE(8000);
+ CHECK_RATE(11025);
+ CHECK_RATE(16000);
+ CHECK_RATE(22050);
+ CHECK_RATE(32000);
+ CHECK_RATE(44100);
+ CHECK_RATE(48000);
+ CHECK_RATE(64000);
+ CHECK_RATE(88200);
+ CHECK_RATE(96000);
+ CHECK_RATE(176400);
+ CHECK_RATE(192000);
+ hw->rates = rates;
+
+ /* well. the codec might want 24 bits only, and we'll
+ * ever only transfer 24 bits, but they are top-aligned!
+ * So for alsa, we claim that we're doing full 32 bit
+ * while in reality we'll ignore the lower 8 bits of
+ * that when doing playback (they're transferred as 0
+ * as far as I know, no codecs we have are 32-bit capable
+ * so I can't really test) and when doing recording we'll
+ * always have those lower 8 bits recorded as 0 */
+ if (formats & SNDRV_PCM_FMTBIT_S24_BE)
+ formats |= SNDRV_PCM_FMTBIT_S32_BE;
+ if (formats & SNDRV_PCM_FMTBIT_U24_BE)
+ formats |= SNDRV_PCM_FMTBIT_U32_BE;
+ /* now mask off what we can support. I suppose we could
+ * also support S24_3LE and some similar formats, but I
+ * doubt there's a codec that would be able to use that,
+ * so we don't support it here. */
+ hw->formats = formats & (SNDRV_PCM_FMTBIT_S16_BE |
+ SNDRV_PCM_FMTBIT_U16_BE |
+ SNDRV_PCM_FMTBIT_S32_BE |
+ SNDRV_PCM_FMTBIT_U32_BE);
+
+ /* we need to set the highest and lowest rate possible.
+ * These are the highest and lowest rates alsa can
+ * support properly in its bitfield.
+ * Below, we'll use that to restrict to the rate
+ * currently in use (if any). */
+ hw->rate_min = 5512;
+ hw->rate_max = 192000;
+ /* if the other stream is active, then we can only
+ * support what it is currently using.
+ * FIXME: I lied. This comment is wrong. We can support
+ * anything that works with the same serial format, ie.
+ * when recording 24 bit sound we can well play 16 bit
+ * sound at the same time iff using the same transfer mode.
+ */
+ if (other->active) {
+ /* FIXME: is this guaranteed by the alsa api? */
+ hw->formats &= (1ULL << i2sdev->format);
+ /* see above, restrict rates to the one we already have */
+ hw->rate_min = i2sdev->rate;
+ hw->rate_max = i2sdev->rate;
+ }
+
+ hw->channels_min = 2;
+ hw->channels_max = 2;
+ /* these are somewhat arbitrary */
+ hw->buffer_bytes_max = 131072;
+ hw->period_bytes_min = 256;
+ hw->period_bytes_max = 16384;
+ hw->periods_min = 3;
+ hw->periods_max = MAX_DBDMA_COMMANDS;
+ list_for_each_entry(cii, &sdev->codec_list, list) {
+ if (cii->codec->open) {
+ err = cii->codec->open(cii, pi->substream);
+ if (err) {
+ result = err;
+ /* unwind */
+ found_this = 0;
+ list_for_each_entry_reverse(rev,
+ &sdev->codec_list, list) {
+ if (found_this && rev->codec->close) {
+ rev->codec->close(rev,
+ pi->substream);
+ }
+ if (rev == cii)
+ found_this = 1;
+ }
+ goto out_unlock;
+ }
+ }
+ }
+
+ out_unlock:
+ mutex_unlock(&i2sdev->lock);
+ return result;
+}
+
+#undef CHECK_RATE
+
+static int i2sbus_pcm_close(struct i2sbus_dev *i2sdev, int in)
+{
+ struct codec_info_item *cii;
+ struct pcm_info *pi;
+ int err = 0, tmp;
+
+ mutex_lock(&i2sdev->lock);
+
+ get_pcm_info(i2sdev, in, &pi, NULL);
+
+ list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {
+ if (cii->codec->close) {
+ tmp = cii->codec->close(cii, pi->substream);
+ if (tmp)
+ err = tmp;
+ }
+ }
+
+ pi->substream = NULL;
+ pi->active = 0;
+ mutex_unlock(&i2sdev->lock);
+ return err;
+}
+
+static int i2sbus_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
+}
+
+static int i2sbus_hw_free(struct snd_pcm_substream *substream)
+{
+ snd_pcm_lib_free_pages(substream);
+ return 0;
+}
+
+static int i2sbus_pcm_prepare(struct i2sbus_dev *i2sdev, int in)
+{
+ /* whee. Hard work now. The user has selected a bitrate
+ * and bit format, so now we have to program our
+ * I2S controller appropriately. */
+ struct snd_pcm_runtime *runtime;
+ struct dbdma_cmd *command;
+ int i, periodsize;
+ dma_addr_t offset;
+ struct bus_info bi;
+ struct codec_info_item *cii;
+ int sfr = 0; /* serial format register */
+ int dws = 0; /* data word sizes reg */
+ int input_16bit;
+ struct pcm_info *pi, *other;
+ int cnt;
+ int result = 0;
+
+ mutex_lock(&i2sdev->lock);
+
+ get_pcm_info(i2sdev, in, &pi, &other);
+
+ if (pi->dbdma_ring.running) {
+ result = -EBUSY;
+ goto out_unlock;
+ }
+
+ runtime = pi->substream->runtime;
+ pi->active = 1;
+ if (other->active &&
+ ((i2sdev->format != runtime->format)
+ || (i2sdev->rate != runtime->rate))) {
+ result = -EINVAL;
+ goto out_unlock;
+ }
+
+ i2sdev->format = runtime->format;
+ i2sdev->rate = runtime->rate;
+
+ periodsize = snd_pcm_lib_period_bytes(pi->substream);
+ pi->current_period = 0;
+
+ /* generate dbdma command ring first */
+ command = pi->dbdma_ring.cmds;
+ offset = runtime->dma_addr;
+ for (i = 0; i < pi->substream->runtime->periods;
+ i++, command++, offset += periodsize) {
+ memset(command, 0, sizeof(struct dbdma_cmd));
+ command->command =
+ cpu_to_le16((in ? INPUT_MORE : OUTPUT_MORE) | INTR_ALWAYS);
+ command->phy_addr = cpu_to_le32(offset);
+ command->req_count = cpu_to_le16(periodsize);
+ command->xfer_status = cpu_to_le16(0);
+ }
+ /* last one branches back to first */
+ command--;
+ command->command |= cpu_to_le16(BR_ALWAYS);
+ command->cmd_dep = cpu_to_le32(pi->dbdma_ring.bus_cmd_start);
+
+ /* ok, let's set the serial format and stuff */
+ switch (runtime->format) {
+ /* 16 bit formats */
+ case SNDRV_PCM_FORMAT_S16_BE:
+ case SNDRV_PCM_FORMAT_U16_BE:
+ /* FIXME: if we add different bus factors we need to
+ * do more here!! */
+ bi.bus_factor = 0;
+ list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {
+ bi.bus_factor = cii->codec->bus_factor;
+ break;
+ }
+ if (!bi.bus_factor) {
+ result = -ENODEV;
+ goto out_unlock;
+ }
+ input_16bit = 1;
+ break;
+ case SNDRV_PCM_FORMAT_S32_BE:
+ case SNDRV_PCM_FORMAT_U32_BE:
+ /* force 64x bus speed, otherwise the data cannot be
+ * transferred quickly enough! */
+ bi.bus_factor = 64;
+ input_16bit = 0;
+ break;
+ default:
+ result = -EINVAL;
+ goto out_unlock;
+ }
+ /* we assume all sysclocks are the same! */
+ list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {
+ bi.sysclock_factor = cii->codec->sysclock_factor;
+ break;
+ }
+
+ if (clock_and_divisors(bi.sysclock_factor,
+ bi.bus_factor,
+ runtime->rate,
+ &sfr) < 0) {
+ result = -EINVAL;
+ goto out_unlock;
+ }
+ switch (bi.bus_factor) {
+ case 32:
+ sfr |= I2S_SF_SERIAL_FORMAT_I2S_32X;
+ break;
+ case 64:
+ sfr |= I2S_SF_SERIAL_FORMAT_I2S_64X;
+ break;
+ }
+ /* FIXME: THIS ASSUMES MASTER ALL THE TIME */
+ sfr |= I2S_SF_SCLK_MASTER;
+
+ list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {
+ int err = 0;
+ if (cii->codec->prepare)
+ err = cii->codec->prepare(cii, &bi, pi->substream);
+ if (err) {
+ result = err;
+ goto out_unlock;
+ }
+ }
+ /* codecs are fine with it, so set our clocks */
+ if (input_16bit)
+ dws = (2 << I2S_DWS_NUM_CHANNELS_IN_SHIFT) |
+ (2 << I2S_DWS_NUM_CHANNELS_OUT_SHIFT) |
+ I2S_DWS_DATA_IN_16BIT | I2S_DWS_DATA_OUT_16BIT;
+ else
+ dws = (2 << I2S_DWS_NUM_CHANNELS_IN_SHIFT) |
+ (2 << I2S_DWS_NUM_CHANNELS_OUT_SHIFT) |
+ I2S_DWS_DATA_IN_24BIT | I2S_DWS_DATA_OUT_24BIT;
+
+ /* early exit if already programmed correctly */
+ /* not locking these is fine since we touch them only in this function */
+ if (in_le32(&i2sdev->intfregs->serial_format) == sfr
+ && in_le32(&i2sdev->intfregs->data_word_sizes) == dws)
+ goto out_unlock;
+
+ /* let's notify the codecs about clocks going away.
+ * For now we only do mastering on the i2s cell... */
+ list_for_each_entry(cii, &i2sdev->sound.codec_list, list)
+ if (cii->codec->switch_clock)
+ cii->codec->switch_clock(cii, CLOCK_SWITCH_PREPARE_SLAVE);
+
+ i2sbus_control_enable(i2sdev->control, i2sdev);
+ i2sbus_control_cell(i2sdev->control, i2sdev, 1);
+
+ out_le32(&i2sdev->intfregs->intr_ctl, I2S_PENDING_CLOCKS_STOPPED);
+
+ i2sbus_control_clock(i2sdev->control, i2sdev, 0);
+
+ msleep(1);
+
+ /* wait for clock stopped. This can apparently take a while... */
+ cnt = 100;
+ while (cnt-- &&
+ !(in_le32(&i2sdev->intfregs->intr_ctl) & I2S_PENDING_CLOCKS_STOPPED)) {
+ msleep(5);
+ }
+ out_le32(&i2sdev->intfregs->intr_ctl, I2S_PENDING_CLOCKS_STOPPED);
+
+ /* not locking these is fine since we touch them only in this function */
+ out_le32(&i2sdev->intfregs->serial_format, sfr);
+ out_le32(&i2sdev->intfregs->data_word_sizes, dws);
+
+ i2sbus_control_enable(i2sdev->control, i2sdev);
+ i2sbus_control_cell(i2sdev->control, i2sdev, 1);
+ i2sbus_control_clock(i2sdev->control, i2sdev, 1);
+ msleep(1);
+
+ list_for_each_entry(cii, &i2sdev->sound.codec_list, list)
+ if (cii->codec->switch_clock)
+ cii->codec->switch_clock(cii, CLOCK_SWITCH_SLAVE);
+
+ out_unlock:
+ mutex_unlock(&i2sdev->lock);
+ return result;
+}
+
+static struct dbdma_cmd STOP_CMD = {
+ .command = __constant_cpu_to_le16(DBDMA_STOP),
+};
+
+static int i2sbus_pcm_trigger(struct i2sbus_dev *i2sdev, int in, int cmd)
+{
+ struct codec_info_item *cii;
+ struct pcm_info *pi;
+ int timeout;
+ struct dbdma_cmd tmp;
+ int result = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2sdev->low_lock, flags);
+
+ get_pcm_info(i2sdev, in, &pi, NULL);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ if (pi->dbdma_ring.running) {
+ result = -EALREADY;
+ goto out_unlock;
+ }
+ list_for_each_entry(cii, &i2sdev->sound.codec_list, list)
+ if (cii->codec->start)
+ cii->codec->start(cii, pi->substream);
+ pi->dbdma_ring.running = 1;
+
+ /* reset dma engine */
+ out_le32(&pi->dbdma->control,
+ 0 | (RUN | PAUSE | FLUSH | WAKE) << 16);
+ timeout = 100;
+ while (in_le32(&pi->dbdma->status) & RUN && timeout--)
+ udelay(1);
+ if (timeout <= 0) {
+ printk(KERN_ERR
+ "i2sbus: error waiting for dma reset\n");
+ result = -ENXIO;
+ goto out_unlock;
+ }
+
+ /* write dma command buffer address to the dbdma chip */
+ out_le32(&pi->dbdma->cmdptr, pi->dbdma_ring.bus_cmd_start);
+ /* post PCI write */
+ mb();
+ (void)in_le32(&pi->dbdma->status);
+
+ /* change first command to STOP */
+ tmp = *pi->dbdma_ring.cmds;
+ *pi->dbdma_ring.cmds = STOP_CMD;
+
+ /* set running state, remember that the first command is STOP */
+ out_le32(&pi->dbdma->control, RUN | (RUN << 16));
+ timeout = 100;
+ /* wait for STOP to be executed */
+ while (in_le32(&pi->dbdma->status) & ACTIVE && timeout--)
+ udelay(1);
+ if (timeout <= 0) {
+ printk(KERN_ERR "i2sbus: error waiting for dma stop\n");
+ result = -ENXIO;
+ goto out_unlock;
+ }
+ /* again, write dma command buffer address to the dbdma chip,
+ * this time of the first real command */
+ *pi->dbdma_ring.cmds = tmp;
+ out_le32(&pi->dbdma->cmdptr, pi->dbdma_ring.bus_cmd_start);
+ /* post write */
+ mb();
+ (void)in_le32(&pi->dbdma->status);
+
+ /* reset dma engine again */
+ out_le32(&pi->dbdma->control,
+ 0 | (RUN | PAUSE | FLUSH | WAKE) << 16);
+ timeout = 100;
+ while (in_le32(&pi->dbdma->status) & RUN && timeout--)
+ udelay(1);
+ if (timeout <= 0) {
+ printk(KERN_ERR
+ "i2sbus: error waiting for dma reset\n");
+ result = -ENXIO;
+ goto out_unlock;
+ }
+
+ /* wake up the chip with the next descriptor */
+ out_le32(&pi->dbdma->control,
+ (RUN | WAKE) | ((RUN | WAKE) << 16));
+ /* get the frame count */
+ pi->frame_count = in_le32(&i2sdev->intfregs->frame_count);
+
+ /* off you go! */
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ if (!pi->dbdma_ring.running) {
+ result = -EALREADY;
+ goto out_unlock;
+ }
+
+ /* turn off all relevant bits */
+ out_le32(&pi->dbdma->control,
+ (RUN | WAKE | FLUSH | PAUSE) << 16);
+ {
+ /* FIXME: move to own function */
+ int timeout = 5000;
+ while ((in_le32(&pi->dbdma->status) & RUN)
+ && --timeout > 0)
+ udelay(1);
+ if (!timeout)
+ printk(KERN_ERR
+ "i2sbus: timed out turning "
+ "off dbdma engine!\n");
+ }
+
+ pi->dbdma_ring.running = 0;
+ list_for_each_entry(cii, &i2sdev->sound.codec_list, list)
+ if (cii->codec->stop)
+ cii->codec->stop(cii, pi->substream);
+ break;
+ default:
+ result = -EINVAL;
+ goto out_unlock;
+ }
+
+ out_unlock:
+ spin_unlock_irqrestore(&i2sdev->low_lock, flags);
+ return result;
+}
+
+static snd_pcm_uframes_t i2sbus_pcm_pointer(struct i2sbus_dev *i2sdev, int in)
+{
+ struct pcm_info *pi;
+ u32 fc;
+
+ get_pcm_info(i2sdev, in, &pi, NULL);
+
+ fc = in_le32(&i2sdev->intfregs->frame_count);
+ fc = fc - pi->frame_count;
+
+ return (bytes_to_frames(pi->substream->runtime,
+ pi->current_period *
+ snd_pcm_lib_period_bytes(pi->substream))
+ + fc) % pi->substream->runtime->buffer_size;
+}
+
+static inline void handle_interrupt(struct i2sbus_dev *i2sdev, int in)
+{
+ struct pcm_info *pi;
+ u32 fc;
+ u32 delta;
+
+ spin_lock(&i2sdev->low_lock);
+ get_pcm_info(i2sdev, in, &pi, NULL);
+
+ if (!pi->dbdma_ring.running) {
+ /* there was still an interrupt pending
+ * while we stopped. or maybe another
+ * processor (not the one that was stopping
+ * the DMA engine) was spinning above
+ * waiting for the lock. */
+ goto out_unlock;
+ }
+
+ fc = in_le32(&i2sdev->intfregs->frame_count);
+ /* a counter overflow does not change the calculation. */
+ delta = fc - pi->frame_count;
+
+ /* update current_period */
+ while (delta >= pi->substream->runtime->period_size) {
+ pi->current_period++;
+ delta = delta - pi->substream->runtime->period_size;
+ }
+
+ if (unlikely(delta)) {
+ /* Some interrupt came late, so check the dbdma.
+ * This special case exists to syncronize the frame_count with
+ * the dbdma transfer, but is hit every once in a while. */
+ int period;
+
+ period = (in_le32(&pi->dbdma->cmdptr)
+ - pi->dbdma_ring.bus_cmd_start)
+ / sizeof(struct dbdma_cmd);
+ pi->current_period = pi->current_period
+ % pi->substream->runtime->periods;
+
+ while (pi->current_period != period) {
+ pi->current_period++;
+ pi->current_period %= pi->substream->runtime->periods;
+ /* Set delta to zero, as the frame_count value is too
+ * high (otherwise the code path will not be executed).
+ * This corrects the fact that the frame_count is too
+ * low at the beginning due to buffering. */
+ delta = 0;
+ }
+ }
+
+ pi->frame_count = fc - delta;
+ pi->current_period %= pi->substream->runtime->periods;
+
+ spin_unlock(&i2sdev->low_lock);
+ /* may call _trigger again, hence needs to be unlocked */
+ snd_pcm_period_elapsed(pi->substream);
+ return;
+ out_unlock:
+ spin_unlock(&i2sdev->low_lock);
+}
+
+irqreturn_t i2sbus_tx_intr(int irq, void *devid, struct pt_regs *regs)
+{
+ handle_interrupt((struct i2sbus_dev *)devid, 0);
+ return IRQ_HANDLED;
+}
+
+irqreturn_t i2sbus_rx_intr(int irq, void *devid, struct pt_regs * regs)
+{
+ handle_interrupt((struct i2sbus_dev *)devid, 1);
+ return IRQ_HANDLED;
+}
+
+static int i2sbus_playback_open(struct snd_pcm_substream *substream)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+
+ if (!i2sdev)
+ return -EINVAL;
+ i2sdev->out.substream = substream;
+ return i2sbus_pcm_open(i2sdev, 0);
+}
+
+static int i2sbus_playback_close(struct snd_pcm_substream *substream)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+ int err;
+
+ if (!i2sdev)
+ return -EINVAL;
+ if (i2sdev->out.substream != substream)
+ return -EINVAL;
+ err = i2sbus_pcm_close(i2sdev, 0);
+ if (!err)
+ i2sdev->out.substream = NULL;
+ return err;
+}
+
+static int i2sbus_playback_prepare(struct snd_pcm_substream *substream)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+
+ if (!i2sdev)
+ return -EINVAL;
+ if (i2sdev->out.substream != substream)
+ return -EINVAL;
+ return i2sbus_pcm_prepare(i2sdev, 0);
+}
+
+static int i2sbus_playback_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+
+ if (!i2sdev)
+ return -EINVAL;
+ if (i2sdev->out.substream != substream)
+ return -EINVAL;
+ return i2sbus_pcm_trigger(i2sdev, 0, cmd);
+}
+
+static snd_pcm_uframes_t i2sbus_playback_pointer(struct snd_pcm_substream
+ *substream)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+
+ if (!i2sdev)
+ return -EINVAL;
+ if (i2sdev->out.substream != substream)
+ return 0;
+ return i2sbus_pcm_pointer(i2sdev, 0);
+}
+
+static struct snd_pcm_ops i2sbus_playback_ops = {
+ .open = i2sbus_playback_open,
+ .close = i2sbus_playback_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = i2sbus_hw_params,
+ .hw_free = i2sbus_hw_free,
+ .prepare = i2sbus_playback_prepare,
+ .trigger = i2sbus_playback_trigger,
+ .pointer = i2sbus_playback_pointer,
+};
+
+static int i2sbus_record_open(struct snd_pcm_substream *substream)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+
+ if (!i2sdev)
+ return -EINVAL;
+ i2sdev->in.substream = substream;
+ return i2sbus_pcm_open(i2sdev, 1);
+}
+
+static int i2sbus_record_close(struct snd_pcm_substream *substream)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+ int err;
+
+ if (!i2sdev)
+ return -EINVAL;
+ if (i2sdev->in.substream != substream)
+ return -EINVAL;
+ err = i2sbus_pcm_close(i2sdev, 1);
+ if (!err)
+ i2sdev->in.substream = NULL;
+ return err;
+}
+
+static int i2sbus_record_prepare(struct snd_pcm_substream *substream)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+
+ if (!i2sdev)
+ return -EINVAL;
+ if (i2sdev->in.substream != substream)
+ return -EINVAL;
+ return i2sbus_pcm_prepare(i2sdev, 1);
+}
+
+static int i2sbus_record_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+
+ if (!i2sdev)
+ return -EINVAL;
+ if (i2sdev->in.substream != substream)
+ return -EINVAL;
+ return i2sbus_pcm_trigger(i2sdev, 1, cmd);
+}
+
+static snd_pcm_uframes_t i2sbus_record_pointer(struct snd_pcm_substream
+ *substream)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream);
+
+ if (!i2sdev)
+ return -EINVAL;
+ if (i2sdev->in.substream != substream)
+ return 0;
+ return i2sbus_pcm_pointer(i2sdev, 1);
+}
+
+static struct snd_pcm_ops i2sbus_record_ops = {
+ .open = i2sbus_record_open,
+ .close = i2sbus_record_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = i2sbus_hw_params,
+ .hw_free = i2sbus_hw_free,
+ .prepare = i2sbus_record_prepare,
+ .trigger = i2sbus_record_trigger,
+ .pointer = i2sbus_record_pointer,
+};
+
+static void i2sbus_private_free(struct snd_pcm *pcm)
+{
+ struct i2sbus_dev *i2sdev = snd_pcm_chip(pcm);
+ struct codec_info_item *p, *tmp;
+
+ i2sdev->sound.pcm = NULL;
+ i2sdev->out.created = 0;
+ i2sdev->in.created = 0;
+ list_for_each_entry_safe(p, tmp, &i2sdev->sound.codec_list, list) {
+ printk(KERN_ERR "i2sbus: a codec didn't unregister!\n");
+ list_del(&p->list);
+ module_put(p->codec->owner);
+ kfree(p);
+ }
+ soundbus_dev_put(&i2sdev->sound);
+ module_put(THIS_MODULE);
+}
+
+/* FIXME: this function needs an error handling strategy with labels */
+int
+i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
+ struct codec_info *ci, void *data)
+{
+ int err, in = 0, out = 0;
+ struct transfer_info *tmp;
+ struct i2sbus_dev *i2sdev = soundbus_dev_to_i2sbus_dev(dev);
+ struct codec_info_item *cii;
+
+ if (!dev->pcmname || dev->pcmid == -1) {
+ printk(KERN_ERR "i2sbus: pcm name and id must be set!\n");
+ return -EINVAL;
+ }
+
+ list_for_each_entry(cii, &dev->codec_list, list) {
+ if (cii->codec_data == data)
+ return -EALREADY;
+ }
+
+ if (!ci->transfers || !ci->transfers->formats
+ || !ci->transfers->rates || !ci->usable)
+ return -EINVAL;
+
+ /* we currently code the i2s transfer on the clock, and support only
+ * 32 and 64 */
+ if (ci->bus_factor != 32 && ci->bus_factor != 64)
+ return -EINVAL;
+
+ /* If you want to fix this, you need to keep track of what transport infos
+ * are to be used, which codecs they belong to, and then fix all the
+ * sysclock/busclock stuff above to depend on which is usable */
+ list_for_each_entry(cii, &dev->codec_list, list) {
+ if (cii->codec->sysclock_factor != ci->sysclock_factor) {
+ printk(KERN_DEBUG
+ "cannot yet handle multiple different sysclocks!\n");
+ return -EINVAL;
+ }
+ if (cii->codec->bus_factor != ci->bus_factor) {
+ printk(KERN_DEBUG
+ "cannot yet handle multiple different bus clocks!\n");
+ return -EINVAL;
+ }
+ }
+
+ tmp = ci->transfers;
+ while (tmp->formats && tmp->rates) {
+ if (tmp->transfer_in)
+ in = 1;
+ else
+ out = 1;
+ tmp++;
+ }
+
+ cii = kzalloc(sizeof(struct codec_info_item), GFP_KERNEL);
+ if (!cii) {
+ printk(KERN_DEBUG "i2sbus: failed to allocate cii\n");
+ return -ENOMEM;
+ }
+
+ /* use the private data to point to the codec info */
+ cii->sdev = soundbus_dev_get(dev);
+ cii->codec = ci;
+ cii->codec_data = data;
+
+ if (!cii->sdev) {
+ printk(KERN_DEBUG
+ "i2sbus: failed to get soundbus dev reference\n");
+ kfree(cii);
+ return -ENODEV;
+ }
+
+ if (!try_module_get(THIS_MODULE)) {
+ printk(KERN_DEBUG "i2sbus: failed to get module reference!\n");
+ soundbus_dev_put(dev);
+ kfree(cii);
+ return -EBUSY;
+ }
+
+ if (!try_module_get(ci->owner)) {
+ printk(KERN_DEBUG
+ "i2sbus: failed to get module reference to codec owner!\n");
+ module_put(THIS_MODULE);
+ soundbus_dev_put(dev);
+ kfree(cii);
+ return -EBUSY;
+ }
+
+ if (!dev->pcm) {
+ err = snd_pcm_new(card,
+ dev->pcmname,
+ dev->pcmid,
+ 0,
+ 0,
+ &dev->pcm);
+ if (err) {
+ printk(KERN_DEBUG "i2sbus: failed to create pcm\n");
+ kfree(cii);
+ module_put(ci->owner);
+ soundbus_dev_put(dev);
+ module_put(THIS_MODULE);
+ return err;
+ }
+ }
+
+ /* ALSA yet again sucks.
+ * If it is ever fixed, remove this line. See below. */
+ out = in = 1;
+
+ if (!i2sdev->out.created && out) {
+ if (dev->pcm->card != card) {
+ /* eh? */
+ printk(KERN_ERR
+ "Can't attach same bus to different cards!\n");
+ module_put(ci->owner);
+ kfree(cii);
+ soundbus_dev_put(dev);
+ module_put(THIS_MODULE);
+ return -EINVAL;
+ }
+ if ((err =
+ snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 1))) {
+ module_put(ci->owner);
+ kfree(cii);
+ soundbus_dev_put(dev);
+ module_put(THIS_MODULE);
+ return err;
+ }
+ snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &i2sbus_playback_ops);
+ i2sdev->out.created = 1;
+ }
+
+ if (!i2sdev->in.created && in) {
+ if (dev->pcm->card != card) {
+ printk(KERN_ERR
+ "Can't attach same bus to different cards!\n");
+ module_put(ci->owner);
+ kfree(cii);
+ soundbus_dev_put(dev);
+ module_put(THIS_MODULE);
+ return -EINVAL;
+ }
+ if ((err =
+ snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 1))) {
+ module_put(ci->owner);
+ kfree(cii);
+ soundbus_dev_put(dev);
+ module_put(THIS_MODULE);
+ return err;
+ }
+ snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
+ &i2sbus_record_ops);
+ i2sdev->in.created = 1;
+ }
+
+ /* so we have to register the pcm after adding any substream
+ * to it because alsa doesn't create the devices for the
+ * substreams when we add them later.
+ * Therefore, force in and out on both busses (above) and
+ * register the pcm now instead of just after creating it.
+ */
+ err = snd_device_register(card, dev->pcm);
+ if (err) {
+ printk(KERN_ERR "i2sbus: error registering new pcm\n");
+ module_put(ci->owner);
+ kfree(cii);
+ soundbus_dev_put(dev);
+ module_put(THIS_MODULE);
+ return err;
+ }
+ /* no errors any more, so let's add this to our list */
+ list_add(&cii->list, &dev->codec_list);
+
+ dev->pcm->private_data = i2sdev;
+ dev->pcm->private_free = i2sbus_private_free;
+
+ /* well, we really should support scatter/gather DMA */
+ snd_pcm_lib_preallocate_pages_for_all(
+ dev->pcm, SNDRV_DMA_TYPE_DEV,
+ snd_dma_pci_data(macio_get_pci_dev(i2sdev->macio)),
+ 64 * 1024, 64 * 1024);
+
+ return 0;
+}
+
+void i2sbus_detach_codec(struct soundbus_dev *dev, void *data)
+{
+ struct codec_info_item *cii = NULL, *i;
+
+ list_for_each_entry(i, &dev->codec_list, list) {
+ if (i->codec_data == data) {
+ cii = i;
+ break;
+ }
+ }
+ if (cii) {
+ list_del(&cii->list);
+ module_put(cii->codec->owner);
+ kfree(cii);
+ }
+ /* no more codecs, but still a pcm? */
+ if (list_empty(&dev->codec_list) && dev->pcm) {
+ /* the actual cleanup is done by the callback above! */
+ snd_device_free(dev->pcm->card, dev->pcm);
+ }
+}
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus.h b/sound/aoa/soundbus/i2sbus/i2sbus.h
new file mode 100644
index 000000000000..cfa5162e3b0f
--- /dev/null
+++ b/sound/aoa/soundbus/i2sbus/i2sbus.h
@@ -0,0 +1,112 @@
+/*
+ * i2sbus driver -- private definitions
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+#ifndef __I2SBUS_H
+#define __I2SBUS_H
+#include <asm/dbdma.h>
+#include <linux/interrupt.h>
+#include <sound/pcm.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <asm/prom.h>
+#include "i2sbus-interface.h"
+#include "i2sbus-control.h"
+#include "../soundbus.h"
+
+struct i2sbus_control {
+ volatile struct i2s_control_regs __iomem *controlregs;
+ struct resource rsrc;
+ struct list_head list;
+};
+
+#define MAX_DBDMA_COMMANDS 32
+
+struct dbdma_command_mem {
+ dma_addr_t bus_addr;
+ dma_addr_t bus_cmd_start;
+ struct dbdma_cmd *cmds;
+ void *space;
+ int size;
+ u32 running:1;
+};
+
+struct pcm_info {
+ u32 created:1, /* has this direction been created with alsa? */
+ active:1; /* is this stream active? */
+ /* runtime information */
+ struct snd_pcm_substream *substream;
+ int current_period;
+ u32 frame_count;
+ struct dbdma_command_mem dbdma_ring;
+ volatile struct dbdma_regs __iomem *dbdma;
+};
+
+struct i2sbus_dev {
+ struct soundbus_dev sound;
+ struct macio_dev *macio;
+ struct i2sbus_control *control;
+ volatile struct i2s_interface_regs __iomem *intfregs;
+
+ struct resource resources[3];
+ struct resource *allocated_resource[3];
+ int interrupts[3];
+ char rnames[3][32];
+
+ /* info about currently active substreams */
+ struct pcm_info out, in;
+ snd_pcm_format_t format;
+ unsigned int rate;
+
+ /* list for a single controller */
+ struct list_head item;
+ /* number of bus on controller */
+ int bus_number;
+ /* for use by control layer */
+ struct pmf_function *enable,
+ *cell_enable,
+ *cell_disable,
+ *clock_enable,
+ *clock_disable;
+
+ /* locks */
+ /* spinlock for low-level interrupt locking */
+ spinlock_t low_lock;
+ /* mutex for high-level consistency */
+ struct mutex lock;
+};
+
+#define soundbus_dev_to_i2sbus_dev(sdev) \
+ container_of(sdev, struct i2sbus_dev, sound)
+
+/* pcm specific functions */
+extern int
+i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
+ struct codec_info *ci, void *data);
+extern void
+i2sbus_detach_codec(struct soundbus_dev *dev, void *data);
+extern irqreturn_t
+i2sbus_tx_intr(int irq, void *devid, struct pt_regs *regs);
+extern irqreturn_t
+i2sbus_rx_intr(int irq, void *devid, struct pt_regs *regs);
+
+/* control specific functions */
+extern int i2sbus_control_init(struct macio_dev* dev,
+ struct i2sbus_control **c);
+extern void i2sbus_control_destroy(struct i2sbus_control *c);
+extern int i2sbus_control_add_dev(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev);
+extern void i2sbus_control_remove_dev(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev);
+extern int i2sbus_control_enable(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev);
+extern int i2sbus_control_cell(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev,
+ int enable);
+extern int i2sbus_control_clock(struct i2sbus_control *c,
+ struct i2sbus_dev *i2sdev,
+ int enable);
+#endif /* __I2SBUS_H */
diff --git a/sound/aoa/soundbus/soundbus.h b/sound/aoa/soundbus/soundbus.h
new file mode 100644
index 000000000000..5c27297835d7
--- /dev/null
+++ b/sound/aoa/soundbus/soundbus.h
@@ -0,0 +1,202 @@
+/*
+ * soundbus generic definitions
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+#ifndef __SOUNDBUS_H
+#define __SOUNDBUS_H
+
+#include <asm/of_device.h>
+#include <sound/pcm.h>
+#include <linux/list.h>
+
+
+/* When switching from master to slave or the other way around,
+ * you don't want to have the codec chip acting as clock source
+ * while the bus still is.
+ * More importantly, while switch from slave to master, you need
+ * to turn off the chip's master function first, but then there's
+ * no clock for a while and other chips might reset, so we notify
+ * their drivers after having switched.
+ * The constants here are codec-point of view, so when we switch
+ * the soundbus to master we tell the codec we're going to switch
+ * and give it CLOCK_SWITCH_PREPARE_SLAVE!
+ */
+enum clock_switch {
+ CLOCK_SWITCH_PREPARE_SLAVE,
+ CLOCK_SWITCH_PREPARE_MASTER,
+ CLOCK_SWITCH_SLAVE,
+ CLOCK_SWITCH_MASTER,
+ CLOCK_SWITCH_NOTIFY,
+};
+
+/* information on a transfer the codec can take */
+struct transfer_info {
+ u64 formats; /* SNDRV_PCM_FMTBIT_* */
+ unsigned int rates; /* SNDRV_PCM_RATE_* */
+ /* flags */
+ u32 transfer_in:1, /* input = 1, output = 0 */
+ must_be_clock_source:1;
+ /* for codecs to distinguish among their TIs */
+ int tag;
+};
+
+struct codec_info_item {
+ struct codec_info *codec;
+ void *codec_data;
+ struct soundbus_dev *sdev;
+ /* internal, to be used by the soundbus provider */
+ struct list_head list;
+};
+
+/* for prepare, where the codecs need to know
+ * what we're going to drive the bus with */
+struct bus_info {
+ /* see below */
+ int sysclock_factor;
+ int bus_factor;
+};
+
+/* information on the codec itself, plus function pointers */
+struct codec_info {
+ /* the module this lives in */
+ struct module *owner;
+
+ /* supported transfer possibilities, array terminated by
+ * formats or rates being 0. */
+ struct transfer_info *transfers;
+
+ /* Master clock speed factor
+ * to be used (master clock speed = sysclock_factor * sampling freq)
+ * Unused if the soundbus provider has no such notion.
+ */
+ int sysclock_factor;
+
+ /* Bus factor, bus clock speed = bus_factor * sampling freq)
+ * Unused if the soundbus provider has no such notion.
+ */
+ int bus_factor;
+
+ /* operations */
+ /* clock switching, see above */
+ int (*switch_clock)(struct codec_info_item *cii,
+ enum clock_switch clock);
+
+ /* called for each transfer_info when the user
+ * opens the pcm device to determine what the
+ * hardware can support at this point in time.
+ * That can depend on other user-switchable controls.
+ * Return 1 if usable, 0 if not.
+ * out points to another instance of a transfer_info
+ * which is initialised to the values in *ti, and
+ * it's format and rate values can be modified by
+ * the callback if it is necessary to further restrict
+ * the formats that can be used at the moment, for
+ * example when one codec has multiple logical codec
+ * info structs for multiple inputs.
+ */
+ int (*usable)(struct codec_info_item *cii,
+ struct transfer_info *ti,
+ struct transfer_info *out);
+
+ /* called when pcm stream is opened, probably not implemented
+ * most of the time since it isn't too useful */
+ int (*open)(struct codec_info_item *cii,
+ struct snd_pcm_substream *substream);
+
+ /* called when the pcm stream is closed, at this point
+ * the user choices can all be unlocked (see below) */
+ int (*close)(struct codec_info_item *cii,
+ struct snd_pcm_substream *substream);
+
+ /* if the codec must forbid some user choices because
+ * they are not valid with the substream/transfer info,
+ * it must do so here. Example: no digital output for
+ * incompatible framerate, say 8KHz, on Onyx.
+ * If the selected stuff in the substream is NOT
+ * compatible, you have to reject this call! */
+ int (*prepare)(struct codec_info_item *cii,
+ struct bus_info *bi,
+ struct snd_pcm_substream *substream);
+
+ /* start() is called before data is pushed to the codec.
+ * Note that start() must be atomic! */
+ int (*start)(struct codec_info_item *cii,
+ struct snd_pcm_substream *substream);
+
+ /* stop() is called after data is no longer pushed to the codec.
+ * Note that stop() must be atomic! */
+ int (*stop)(struct codec_info_item *cii,
+ struct snd_pcm_substream *substream);
+
+ int (*suspend)(struct codec_info_item *cii, pm_message_t state);
+ int (*resume)(struct codec_info_item *cii);
+};
+
+/* information on a soundbus device */
+struct soundbus_dev {
+ /* the bus it belongs to */
+ struct list_head onbuslist;
+
+ /* the of device it represents */
+ struct of_device ofdev;
+
+ /* what modules go by */
+ char modalias[32];
+
+ /* These fields must be before attach_codec can be called.
+ * They should be set by the owner of the alsa card object
+ * that is needed, and whoever sets them must make sure
+ * that they are unique within that alsa card object. */
+ char *pcmname;
+ int pcmid;
+
+ /* this is assigned by the soundbus provider in attach_codec */
+ struct snd_pcm *pcm;
+
+ /* operations */
+ /* attach a codec to this soundbus, give the alsa
+ * card object the PCMs for this soundbus should be in.
+ * The 'data' pointer must be unique, it is used as the
+ * key for detach_codec(). */
+ int (*attach_codec)(struct soundbus_dev *dev, struct snd_card *card,
+ struct codec_info *ci, void *data);
+ void (*detach_codec)(struct soundbus_dev *dev, void *data);
+ /* TODO: suspend/resume */
+
+ /* private for the soundbus provider */
+ struct list_head codec_list;
+ u32 have_out:1, have_in:1;
+};
+#define to_soundbus_device(d) container_of(d, struct soundbus_dev, ofdev.dev)
+#define of_to_soundbus_device(d) container_of(d, struct soundbus_dev, ofdev)
+
+extern int soundbus_add_one(struct soundbus_dev *dev);
+extern void soundbus_remove_one(struct soundbus_dev *dev);
+
+extern struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev);
+extern void soundbus_dev_put(struct soundbus_dev *dev);
+
+struct soundbus_driver {
+ char *name;
+ struct module *owner;
+
+ /* we don't implement any matching at all */
+
+ int (*probe)(struct soundbus_dev* dev);
+ int (*remove)(struct soundbus_dev* dev);
+
+ int (*suspend)(struct soundbus_dev* dev, pm_message_t state);
+ int (*resume)(struct soundbus_dev* dev);
+ int (*shutdown)(struct soundbus_dev* dev);
+
+ struct device_driver driver;
+};
+#define to_soundbus_driver(drv) container_of(drv,struct soundbus_driver, driver)
+
+extern int soundbus_register_driver(struct soundbus_driver *drv);
+extern void soundbus_unregister_driver(struct soundbus_driver *drv);
+
+#endif /* __SOUNDBUS_H */
diff --git a/sound/aoa/soundbus/sysfs.c b/sound/aoa/soundbus/sysfs.c
new file mode 100644
index 000000000000..d31f8146952a
--- /dev/null
+++ b/sound/aoa/soundbus/sysfs.c
@@ -0,0 +1,43 @@
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/stat.h>
+/* FIX UP */
+#include "soundbus.h"
+
+#define soundbus_config_of_attr(field, format_string) \
+static ssize_t \
+field##_show (struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct soundbus_dev *mdev = to_soundbus_device (dev); \
+ return sprintf (buf, format_string, mdev->ofdev.node->field); \
+}
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct soundbus_dev *sdev = to_soundbus_device(dev);
+ struct of_device *of = &sdev->ofdev;
+ int length;
+
+ if (*sdev->modalias) {
+ strlcpy(buf, sdev->modalias, sizeof(sdev->modalias) + 1);
+ strcat(buf, "\n");
+ length = strlen(buf);
+ } else {
+ length = sprintf(buf, "of:N%sT%s\n",
+ of->node->name, of->node->type);
+ }
+
+ return length;
+}
+
+soundbus_config_of_attr (name, "%s\n");
+soundbus_config_of_attr (type, "%s\n");
+
+struct device_attribute soundbus_dev_attrs[] = {
+ __ATTR_RO(name),
+ __ATTR_RO(type),
+ __ATTR_RO(modalias),
+ __ATTR_NULL
+};