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ssb: Add support for block-I/O

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This adds support for block based I/O to SSB.
This is needed in order to efficiently support PIO data
transfers to the card.
The block-I/O support is only compiled, if it's selected by the
weird driver that needs it. So there's no overhead for sane devices.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch
2008-04-02 19:46:56 +02:00
committed by John W. Linville
parent 93af261451
commit d625a29ba6
5 changed files with 315 additions and 0 deletions
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19
include/linux/ssb/ssb.h
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@@ -78,6 +78,12 @@ struct ssb_bus_ops {
void (*write8)(struct ssb_device *dev, u16 offset, u8 value);
void (*write16)(struct ssb_device *dev, u16 offset, u16 value);
void (*write32)(struct ssb_device *dev, u16 offset, u32 value);
#ifdef CONFIG_SSB_BLOCKIO
void (*block_read)(struct ssb_device *dev, void *buffer,
size_t count, u16 offset, u8 reg_width);
void (*block_write)(struct ssb_device *dev, const void *buffer,
size_t count, u16 offset, u8 reg_width);
#endif
};
@@ -374,6 +380,19 @@ static inline void ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
{
dev->ops->write32(dev, offset, value);
}
#ifdef CONFIG_SSB_BLOCKIO
static inline void ssb_block_read(struct ssb_device *dev, void *buffer,
size_t count, u16 offset, u8 reg_width)
{
dev->ops->block_read(dev, buffer, count, offset, reg_width);
}
static inline void ssb_block_write(struct ssb_device *dev, const void *buffer,
size_t count, u16 offset, u8 reg_width)
{
dev->ops->block_write(dev, buffer, count, offset, reg_width);
}
#endif /* CONFIG_SSB_BLOCKIO */
/* Translation (routing) bits that need to be ORed to DMA