1. 23 Oct, 2015 1 commit
  2. 30 Jan, 2015 3 commits
  3. 22 Oct, 2014 2 commits
  4. 08 Jun, 2014 1 commit
  5. 24 Jul, 2013 1 commit
  6. 19 Mar, 2013 1 commit
  7. 18 Oct, 2008 1 commit
  8. 29 Aug, 2008 1 commit
  9. 12 Aug, 2008 1 commit
  10. 03 Jun, 2008 1 commit
    • Haavard Skinnemoen's avatar
      SPI API improvements · d255bb0e
      Haavard Skinnemoen authored
      This patch gets rid of the spi_chipsel table and adds a handful of new
      functions that makes the SPI layer cleaner and more flexible.
      
      Instead of the spi_chipsel table, each board that wants to use SPI
      gets to implement three hooks:
        * spi_cs_activate(): Activates the chipselect for a given slave
        * spi_cs_deactivate(): Deactivates the chipselect for a given slave
        * spi_cs_is_valid(): Determines if the given bus/chipselect
          combination can be activated.
      
      Not all drivers may need those extra functions however. If that's the
      case, the board code may just leave them out (assuming they know what
      the driver needs) or rely on the linker to strip them out (assuming
      --gc-sections is being used.)
      
      To set up communication parameters for a given slave, the driver needs
      to call spi_setup_slave(). This returns a pointer to an opaque
      spi_slave struct which must be passed as a parameter to subsequent SPI
      calls. This struct can be freed by calling spi_free_slave(), but most
      driver probably don't want to do this.
      
      Before starting one or more SPI transfers, the driver must call
      spi_claim_bus() to gain exclusive access to the SPI bus and initialize
      the hardware. When all transfers are done, the driver must call
      spi_release_bus() to make the bus available to others, and possibly
      shut down the SPI controller hardware.
      
      spi_xfer() behaves mostly the same as before, but it now takes a
      spi_slave parameter instead of a spi_chipsel function pointer. It also
      got a new parameter, flags, which is used to specify chip select
      behaviour. This may be extended with other flags in the future.
      
      This patch has been build-tested on all powerpc and arm boards
      involved. I have not tested NIOS since I don't have a toolchain for it
      installed, so I expect some breakage there even though I've tried
      fixing up everything I could find by visual inspection.
      
      I have run-time tested this on AVR32 ATNGW100 using the atmel_spi and
      DataFlash drivers posted as a follow-up. I'd like some help testing
      other boards that use the existing SPI API.
      
      But most of all, I'd like some comments on the new API. Is this stuff
      usable for everyone? If not, why?
      
      Changed in v4:
        - Build fixes for various boards, drivers and commands
        - Provide common struct spi_slave definition that can be extended by
          drivers
        - Pass a struct spi_slave * to spi_cs_activate and spi_cs_deactivate
        - Make default bus and mode build-time configurable
        - Override default SPI bus ID and mode on mx32ads and imx31_litekit.
      
      Changed in v3:
        - Add opaque struct spi_slave for controller-specific data associated
          with a slave.
        - Add spi_claim_bus() and spi_release_bus()
        - Add spi_free_slave()
        - spi_setup() is now called spi_setup_slave() and returns a
          struct spi_slave
        - soft_spi now supports four SPI modes (CPOL|CPHA)
        - Add bus parameter to spi_setup_slave()
        - Convert the new i.MX32 SPI driver
        - Convert the new MC13783 RTC driver
      
      Changed in v2:
        - Convert the mpc8xxx_spi driver and the mpc8349emds board to the
          new API.
      Signed-off-by: default avatarHaavard Skinnemoen <hskinnemoen@atmel.com>
      Tested-by: default avatarGuennadi Liakhovetski <lg@denx.de>
      d255bb0e
  11. 26 Jul, 2007 1 commit
  12. 27 Jun, 2003 1 commit
    • wdenk's avatar
      * Code cleanup: · 8bde7f77
      wdenk authored
        - remove trailing white space, trailing empty lines, C++ comments, etc.
        - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)
      
      * Patches by Kenneth Johansson, 25 Jun 2003:
        - major rework of command structure
          (work done mostly by Michal Cendrowski and Joakim Kristiansen)
      8bde7f77
  13. 11 Nov, 2002 1 commit
    • wdenk's avatar
      * Patch by Andreas Oberritter, 09 Nov 2002: · eb9401e3
      wdenk authored
        Change behaviour of NetLoop(): return -1 for errors, filesize
        otherwise; return code 0 is valid an means no file loaded - in this
        case the environment still gets updated!
      
      * Patches by Jon Diekema, 9 Nov 2002:
        - improve ADC/DAC clocking on the SACSng board to align
          the failing edges of LRCLK and SCLK
        - sbc8260 configuration tweaks
        - add status LED support for 82xx systems
        - wire sspi/sspo commands into command handler; improved error
          handlering
        - add timestamp support and alternate memory test to the
          SACSng configuration
      eb9401e3
  14. 01 Oct, 2002 1 commit
  15. 26 Sep, 2002 1 commit