1. 22 Jul, 2012 1 commit
  2. 19 Jul, 2012 1 commit
    • John Ballance's avatar
      Various updates to do with the messaging channel, HAL_MachineID, and HAL_Reset · ef241880
      John Ballance authored
      Detail:
      	HAL_Reset now causes a complete reboot of the machiine. It isnt yet properly called from
      	the kernel.. I've not investigated why yet. Behaviour tested using OS_Hardware call
      
      	HAL_MachineID, with the github start.elf from 18 July 2012 will provide a valid MAC address ..
      	i.e. that specific to this machine. The a1 value in HAL_ExtendedID needs to be set 0 for this to be reported
      	by OS_ReadSysInfo .. unfortunately, again at this stage, it stalls the boot when set 0, so just for now
      	the committed value for a1 in HAL_ExtendedID is not 0 .
      
      	centralised messaging routine added. This is used a fair bit in acquiring the operating environment
      	Not yet used in the DMA stuff. probably ought to be. At present the messaging channel this mainly
      	handles is not complete, so information from this code is still WIP
      
      Admin:
        (highlight level of testing that has taken place)
        (bugfix number if appropriate)
      
      
      Version 0.14. Tagged as 'BCM2835-0_14'
      ef241880
  3. 07 Jul, 2012 1 commit
    • Jeffrey Lee's avatar
      Add DMA driver · 985c7199
      Jeffrey Lee authored
      Detail:
        s/DMA, hdr/DMA, Makefile - DMA driver, as an implementation of the DMA controller and list type DMA channel HAL devices
        hdr/StaticWS - Added DMA workspace definition
        hdr/BCM2835 - Removed DMA control block definition (now in hdr/DMA). Add definitions for the mailbox property interface, which should be supported by the GPU firmware sometime soon.
        s/Top - Export a couple of the debug functions. Store logical & physical address of NCNB workspace instead of hackily getting phys addr of the (cacheable) HAL workspace. Call DMA_InitDevices in HAL_InitDevices.
      Admin:
        Tested in BCM2835 ROM
        DMA driver hasn't received large amounts of testing, lacks support for finite-length circular transfers, and currently only has one DMA channel enabled
        More DMA channels should be available once the mailbox property interface is functional and we know which channels the GPU does and doesn't use.
      
      
      Version 0.11. Tagged as 'BCM2835-0_11'
      985c7199
  4. 03 Jun, 2012 1 commit
    • Jeffrey Lee's avatar
      Add USB support · 37c448aa
      Jeffrey Lee authored
      Detail:
        hdr/USB - New header with definition of usbinfo struct that's used by HAL_USBControllerInfo
        hdr/BCM2835 - Add note clarifying how mailboxes are used
        s/Top - Enable power to USB on startup
        s/USB - Implement HAL_USBControllerInfo to expose Synopsys USB controller details to RISC OS
      Admin:
        Tested in BCM2835 ROM with Apr 19th start.elf
      
      
      Version 0.07. Tagged as 'BCM2835-0_07'
      37c448aa
  5. 24 May, 2012 1 commit
    • Ben Avison's avatar
      Whitespace changes · 6d2a16e5
      Ben Avison authored
      Detail:
        Substituted remaining hard spaces with normal ones and expanded tabs.
        This now matches the de facto standard for other components, and also looks
        better in the CVS web viewer.
      Admin:
        No code changes
      
      Version 0.06. Tagged as 'BCM2835-0_06'
      6d2a16e5
  6. 23 May, 2012 1 commit
    • Ben Avison's avatar
      Complete rework of timer and interrupt code · 2579b887
      Ben Avison authored
      Detail:
       * Moved interrupt and timer code out of s.Stubs - they're not stubs any more.
       * Rewrote timer and counter code to use GPU system timer 1 for our Timer0
         rather than the ARM timer. This is recommended in the Broadcom datasheet
         because it's driven from the APB clock and so its speed will vary in
         reduced or low power mode.
       * HAL_CounterDelay now, well, does a delay!
       * Added a Timer1, driven from GPU system timer 3 - common code with Timer0.
       * Reshuffled device numbers so the GPU interrupts are at the bottom. This
         works better for FIQs and makes Timer0 the lowest priority interrupt.
       * Higher device numbers are now consistently treated as higher priority.
       * Stopped using bits 8-31 of the basic interrupt registers. These can't be
         masked, so they cause the kernel to lock up if generated, which happens
         if the GPU interrupt which they alias is generated (which appears to
         include the timers even though this is not documented).
       * Added definitions for all the interrupts, including those redacted from the
         datasheet - we need them at least for timers, USB and SD.
       * Stopped HAL_IRQClear from doing anything - this interrupt controller
         doesn't do latching. To acknowledge timer interrupts, you should use
         HAL_TimerIRQClear (and HAL_IRQClear too for compatibility with other ports).
       * Implemented HAL_IRQStatus and all the FIQ control routines.
       * Offsets to interrupt controller registers now use symbolic names.
       * Replaced some hard spaces in sources with normal ones.
      Admin:
        Tested on a beta Raspberry Pi. Confirmed that interrupt handlers for both
        ARM and GPU sources can both be operational simultaneuosly. However, the FIQ
        code has not been tested. Timer0 is verified as running at the correct
        speed and reporting a count *down* in the correct range (not a count up as
        some previous versions did). HAL_CounterDelay appears correct also.
      
      Version 0.04. Tagged as 'BCM2835-0_04'
      2579b887
  7. 22 May, 2012 1 commit
    • John Ballance's avatar
      Boots with May17th start.elf · bfd45048
      John Ballance authored
      Detail:
         Recent changes in the broadcom startup code now accomodated. frame buffer
         will now determine whether it is L2 cached or not, and be set up accordingly.
         ATAGs not currently read, so ram size defaulted.
        ** note that there will be further updates to this over the following days
        ** trackikng startup code changes.
         added HAL_TimerIRQClear entry
      Admin:
        (highlight level of testing that has taken place)
        (bugfix number if appropriate)
      
      
      Version 0.03. Tagged as 'BCM2835-0_03'
      bfd45048
  8. 20 May, 2012 1 commit
    • John Ballance's avatar
      Update of HAL to incorporate separate development of HAL by J Ballance · 71e5f9c7
      John Ballance authored
        Will now compile against initial developemnt start.elf, and against the
        start.elf in general release at this date. (compile switch UseALBlob in
        hdr.BCM2835). Extended header defs, Updated IRQ stuff, HAL_FramebufferAddress
        Reworked Timers, + a number of other bits. Still work in progress.
      Detail:
        (list files and functions that have changed)
      Admin:
        Compiled and working - as far as it goes -. Will enable use with the current
        start.elf, and is (subject to any minor changes introduced) ready for use with the
        version due for release shortly which will provide the correct transparency operation,
        and a better aligned frame buffer
      
      Version 0.02. Tagged as 'BCM2835-0_02'
      71e5f9c7
  9. 10 May, 2012 1 commit
    • Ben Avison's avatar
      Initial import of BCM2835 (Raspberry Pi) HAL · bfa96cd9
      Ben Avison authored
      Detail:
        Covers the basic functionality, but does require a customised start.elf
        to function. The vast majority is an entirely new implementation and is
        BSD licenced, but 4% (the Makefile and a handful of simple macros) are
        copied from pre-existing Castle-licenced code, so it lives under the
        "mixed" hierarchy. If other HALs are anything to go by, we'll end up
        having to add more Castle code (at least some C runtime functions) so it's
        probably juast as well.
      Admin:
        Code received from Adrian Lees
      bfa96cd9