ssb: Add support for block-I/O

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>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/ssb/ssb.h b/include/linux/ssb/ssb.h
index a8ca396f810a..9f95afd0e9e3 100644
--- a/include/linux/ssb/ssb.h
+++ b/include/linux/ssb/ssb.h
@@ -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