- patches.arch/x86_mce_intel_decode_physical_address.patch:

[linux-flexiantxendom0-3.2.10.git] / include / linux / spi / spi_bitbang.h

diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h
index 3274c50..f987a2b 100644 (file)
--- a/include/linux/spi/spi_bitbang.h
+++ b/include/linux/spi/spi_bitbang.h
@@ -1,24 +1,6 @@
 #ifndef        __SPI_BITBANG_H
 #define        __SPI_BITBANG_H
 
-/*
- * Mix this utility code with some glue code to get one of several types of
- * simple SPI master driver.  Two do polled word-at-a-time I/O:
- *
- *   - GPIO/parport bitbangers.  Provide chipselect() and txrx_word[](),
- *     expanding the per-word routines from the inline templates below.
- *
- *   - Drivers for controllers resembling bare shift registers.  Provide
- *     chipselect() and txrx_word[](), with custom setup()/cleanup() methods
- *     that use your controller's clock and chipselect registers.
- *
- * Some hardware works well with requests at spi_transfer scope:
- *
- *   - Drivers leveraging smarter hardware, with fifos or DMA; or for half
- *     duplex (MicroWire) controllers.  Provide chipselect() and txrx_bufs(),
- *     and custom setup()/cleanup() methods.
- */
-
 #include <linux/workqueue.h>
 
 struct spi_bitbang {
@@ -68,86 +50,3 @@ extern int spi_bitbang_start(struct spi_bitbang *spi);
 extern int spi_bitbang_stop(struct spi_bitbang *spi);
 
 #endif /* __SPI_BITBANG_H */
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef EXPAND_BITBANG_TXRX
-
-/*
- * The code that knows what GPIO pins do what should have declared four
- * functions, ideally as inlines, before #defining EXPAND_BITBANG_TXRX
- * and including this header:
- *
- *  void setsck(struct spi_device *, int is_on);
- *  void setmosi(struct spi_device *, int is_on);
- *  int getmiso(struct spi_device *);
- *  void spidelay(unsigned);
- *
- * setsck()'s is_on parameter is a zero/nonzero boolean.
- *
- * setmosi()'s is_on parameter is a zero/nonzero boolean.
- *
- * getmiso() is required to return 0 or 1 only. Any other value is invalid
- * and will result in improper operation.
- *
- * A non-inlined routine would call bitbang_txrx_*() routines.  The
- * main loop could easily compile down to a handful of instructions,
- * especially if the delay is a NOP (to run at peak speed).
- *
- * Since this is software, the timings may not be exactly what your board's
- * chips need ... there may be several reasons you'd need to tweak timings
- * in these routines, not just make to make it faster or slower to match a
- * particular CPU clock rate.
- */
-
-static inline u32
-bitbang_txrx_be_cpha0(struct spi_device *spi,
-               unsigned nsecs, unsigned cpol,
-               u32 word, u8 bits)
-{
-       /* if (cpol == 0) this is SPI_MODE_0; else this is SPI_MODE_2 */
-
-       /* clock starts at inactive polarity */
-       for (word <<= (32 - bits); likely(bits); bits--) {
-
-               /* setup MSB (to slave) on trailing edge */
-               setmosi(spi, word & (1 << 31));
-               spidelay(nsecs);        /* T(setup) */
-
-               setsck(spi, !cpol);
-               spidelay(nsecs);
-
-               /* sample MSB (from slave) on leading edge */
-               word <<= 1;
-               word |= getmiso(spi);
-               setsck(spi, cpol);
-       }
-       return word;
-}
-
-static inline u32
-bitbang_txrx_be_cpha1(struct spi_device *spi,
-               unsigned nsecs, unsigned cpol,
-               u32 word, u8 bits)
-{
-       /* if (cpol == 0) this is SPI_MODE_1; else this is SPI_MODE_3 */
-
-       /* clock starts at inactive polarity */
-       for (word <<= (32 - bits); likely(bits); bits--) {
-
-               /* setup MSB (to slave) on leading edge */
-               setsck(spi, !cpol);
-               setmosi(spi, word & (1 << 31));
-               spidelay(nsecs); /* T(setup) */
-
-               setsck(spi, cpol);
-               spidelay(nsecs);
-
-               /* sample MSB (from slave) on trailing edge */
-               word <<= 1;
-               word |= getmiso(spi);
-       }
-       return word;
-}
-
-#endif /* EXPAND_BITBANG_TXRX */