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Diffstat (limited to 'sound/aoa/soundbus/i2sbus/i2sbus-core.c')
-rw-r--r--sound/aoa/soundbus/i2sbus/i2sbus-core.c112
1 files changed, 91 insertions, 21 deletions
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-core.c b/sound/aoa/soundbus/i2sbus/i2sbus-core.c
index 8227dbbc994f..23190aa6bc7b 100644
--- a/sound/aoa/soundbus/i2sbus/i2sbus-core.c
+++ b/sound/aoa/soundbus/i2sbus/i2sbus-core.c
@@ -7,13 +7,16 @@
*/
#include <linux/module.h>
-#include <asm/macio.h>
-#include <asm/dbdma.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+
#include <sound/driver.h>
#include <sound/core.h>
-#include <linux/dma-mapping.h>
+
+#include <asm/macio.h>
+#include <asm/dbdma.h>
+
#include "../soundbus.h"
#include "i2sbus.h"
@@ -78,12 +81,12 @@ static void i2sbus_release_dev(struct device *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++)
+ 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=0;i<3;i++)
+ 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);
@@ -106,6 +109,50 @@ static irqreturn_t i2sbus_bus_intr(int irq, void *devid, struct pt_regs *regs)
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;
+ 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 = (u32 *)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,
@@ -113,7 +160,8 @@ static int i2sbus_add_dev(struct macio_dev *macio,
{
struct i2sbus_dev *dev;
struct device_node *child = NULL, *sound = NULL;
- int i;
+ struct resource *r;
+ int i, layout = 0, rlen;
static const char *rnames[] = { "i2sbus: %s (control)",
"i2sbus: %s (tx)",
"i2sbus: %s (rx)" };
@@ -144,8 +192,9 @@ static int i2sbus_add_dev(struct macio_dev *macio,
u32 *layout_id;
layout_id = (u32*) get_property(sound, "layout-id", NULL);
if (layout_id) {
+ layout = *layout_id;
snprintf(dev->sound.modalias, 32,
- "sound-layout-%d", *layout_id);
+ "sound-layout-%d", layout);
force = 1;
}
}
@@ -175,23 +224,32 @@ static int i2sbus_add_dev(struct macio_dev *macio,
dev->bus_number = np->name[4] - 'a';
INIT_LIST_HEAD(&dev->sound.codec_list);
- for (i=0;i<3;i++) {
+ 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);
+ snprintf(dev->rnames[i], sizeof(dev->rnames[i]),
+ rnames[i], np->name);
}
- for (i=0;i<3;i++) {
+ 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;
}
- for (i=0;i<3;i++) {
- if (of_address_to_resource(np, i, &dev->resources[i]))
+
+ /* 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]...
+ /* If only we could use our resource dev->resources[i]...
* but request_resource doesn't know about parents and
- * contained resources... */
+ * contained resources...
+ */
dev->allocated_resource[i] =
request_mem_region(dev->resources[i].start,
dev->resources[i].end -
@@ -202,13 +260,25 @@ static int i2sbus_add_dev(struct macio_dev *macio,
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);
+
+ 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;