diff options
Diffstat (limited to 'sound/aoa/soundbus/i2sbus/i2sbus-core.c')
| -rw-r--r-- | sound/aoa/soundbus/i2sbus/i2sbus-core.c | 112 |
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; |