diff options
Diffstat (limited to 'sound/hda/hdac_bus.c')
| -rw-r--r-- | sound/hda/hdac_bus.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/sound/hda/hdac_bus.c b/sound/hda/hdac_bus.c index 00ea12e67dc8..dc2523ef7d98 100644 --- a/sound/hda/hdac_bus.c +++ b/sound/hda/hdac_bus.c @@ -19,13 +19,11 @@ static const struct hdac_bus_ops default_ops = { * snd_hdac_bus_init - initialize a HD-audio bas bus * @bus: the pointer to bus object * @ops: bus verb operators - * @io_ops: lowlevel I/O operators * * Returns 0 if successful, or a negative error code. */ int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev, - const struct hdac_bus_ops *ops, - const struct hdac_io_ops *io_ops) + const struct hdac_bus_ops *ops) { memset(bus, 0, sizeof(*bus)); bus->dev = dev; @@ -33,7 +31,6 @@ int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev, bus->ops = ops; else bus->ops = &default_ops; - bus->io_ops = io_ops; bus->dma_type = SNDRV_DMA_TYPE_DEV; INIT_LIST_HEAD(&bus->stream_list); INIT_LIST_HEAD(&bus->codec_list); @@ -218,3 +215,33 @@ void snd_hdac_bus_remove_device(struct hdac_bus *bus, flush_work(&bus->unsol_work); } EXPORT_SYMBOL_GPL(snd_hdac_bus_remove_device); + +#ifdef CONFIG_SND_HDA_ALIGNED_MMIO +/* Helpers for aligned read/write of mmio space, for Tegra */ +unsigned int snd_hdac_aligned_read(void __iomem *addr, unsigned int mask) +{ + void __iomem *aligned_addr = + (void __iomem *)((unsigned long)(addr) & ~0x3); + unsigned int shift = ((unsigned long)(addr) & 0x3) << 3; + unsigned int v; + + v = readl(aligned_addr); + return (v >> shift) & mask; +} +EXPORT_SYMBOL_GPL(snd_hdac_aligned_read); + +void snd_hdac_aligned_write(unsigned int val, void __iomem *addr, + unsigned int mask) +{ + void __iomem *aligned_addr = + (void __iomem *)((unsigned long)(addr) & ~0x3); + unsigned int shift = ((unsigned long)(addr) & 0x3) << 3; + unsigned int v; + + v = readl(aligned_addr); + v &= ~(mask << shift); + v |= val << shift; + writel(v, aligned_addr); +} +EXPORT_SYMBOL_GPL(snd_hdac_aligned_write); +#endif /* CONFIG_SND_HDA_ALIGNED_MMIO */ |