[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>

1 files changed, 192 insertions, 0 deletions

diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-control.c b/sound/aoa/soundbus/i2sbus/i2sbus-control.c
new file mode 100644
index 00000000000..f50407952d3
--- /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;
+}