diff options
author | Vinod Koul <vinod.koul@intel.com> | 2015-06-17 11:20:18 +0530 |
---|---|---|
committer | Takashi Iwai <tiwai@suse.de> | 2015-06-17 12:33:43 +0200 |
commit | 99463b3a399419b3bd795abce5e10c5de87c98d3 (patch) | |
tree | 7a5da4ee0908ee0f8caa91521e4bb832a3d20124 /sound/hda/ext | |
parent | bab4445f9a083f087d0ebb4ba3e9dde669a6b9a5 (diff) | |
download | linux-99463b3a399419b3bd795abce5e10c5de87c98d3.tar.bz2 |
ALSA: hda: provide default bus io ops extended hdac
A typical io ops use simple io accessors which can be common for most
drivers, so provide a default ops which will be used if driver doesn't
provide one
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda/ext')
-rw-r--r-- | sound/hda/ext/hdac_ext_bus.c | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/sound/hda/ext/hdac_ext_bus.c b/sound/hda/ext/hdac_ext_bus.c index f1100354c591..0aa5d9eb6c3f 100644 --- a/sound/hda/ext/hdac_ext_bus.c +++ b/sound/hda/ext/hdac_ext_bus.c @@ -24,12 +24,65 @@ MODULE_DESCRIPTION("HDA extended core"); MODULE_LICENSE("GPL v2"); +static void hdac_ext_writel(u32 value, u32 __iomem *addr) +{ + writel(value, addr); +} + +static u32 hdac_ext_readl(u32 __iomem *addr) +{ + return readl(addr); +} + +static void hdac_ext_writew(u16 value, u16 __iomem *addr) +{ + writew(value, addr); +} + +static u16 hdac_ext_readw(u16 __iomem *addr) +{ + return readw(addr); +} + +static void hdac_ext_writeb(u8 value, u8 __iomem *addr) +{ + writeb(value, addr); +} + +static u8 hdac_ext_readb(u8 __iomem *addr) +{ + return readb(addr); +} + +static int hdac_ext_dma_alloc_pages(struct hdac_bus *bus, int type, + size_t size, struct snd_dma_buffer *buf) +{ + return snd_dma_alloc_pages(type, bus->dev, size, buf); +} + +static void hdac_ext_dma_free_pages(struct hdac_bus *bus, struct snd_dma_buffer *buf) +{ + snd_dma_free_pages(buf); +} + +static const struct hdac_io_ops hdac_ext_default_io = { + .reg_writel = hdac_ext_writel, + .reg_readl = hdac_ext_readl, + .reg_writew = hdac_ext_writew, + .reg_readw = hdac_ext_readw, + .reg_writeb = hdac_ext_writeb, + .reg_readb = hdac_ext_readb, + .dma_alloc_pages = hdac_ext_dma_alloc_pages, + .dma_free_pages = hdac_ext_dma_free_pages, +}; + /** * snd_hdac_ext_bus_init - initialize a HD-audio extended bus * @ebus: the pointer to extended bus object * @dev: device pointer * @ops: bus verb operators - * @io_ops: lowlevel I/O operators + * @io_ops: lowlevel I/O operators, can be NULL. If NULL core will use + * default ops * * Returns 0 if successful, or a negative error code. */ @@ -40,6 +93,10 @@ int snd_hdac_ext_bus_init(struct hdac_ext_bus *ebus, struct device *dev, int ret; static int idx; + /* check if io ops are provided, if not load the defaults */ + if (io_ops == NULL) + io_ops = &hdac_ext_default_io; + ret = snd_hdac_bus_init(&ebus->bus, dev, ops, io_ops); if (ret < 0) return ret; |