1. 03 Aug, 2018 1 commit
  2. 26 Apr, 2016 1 commit
  3. 27 Nov, 2014 1 commit
    • Suman Anna's avatar
      mailbox/omap: adapt to the new mailbox framework · 8841a66a
      Suman Anna authored
      The OMAP mailbox driver and its existing clients (remoteproc
      for OMAP4+) are adapted to use the generic mailbox framework.
      
      The main changes for the adaptation are:
        - The tasklet used for Tx is replaced with the state machine from
          the generic mailbox framework. The workqueue used for processing
          the received messages stays intact for minimizing the effects on
          the OMAP mailbox clients.
        - The existing exported client API, omap_mbox_get, omap_mbox_put and
          omap_mbox_send_msg are deleted, as the framework provides equivalent
          functionality. A OMAP-specific omap_mbox_request_channel is added
          though to support non-DT way of requesting mailboxes.
        - The OMAP mailbox driver is integrated with the mailbox framework
          through the proper implementations of mbox_chan_ops, except for
          .last_tx_done and .peek_data. The OMAP mailbox driver does not need
          these ops, as it is completely interrupt driven.
        - The OMAP mailbox driver uses a custom of_xlate controller ops that
          allows phandles for the pargs specifier instead of indexing to avoid
          any channel registration order dependencies.
        - The new framework does not support multiple clients operating on a
          single channel, so the reference counting logic is simplified.
        - The remoteproc driver (current client) is adapted to use the new API.
          The notifier callbacks used within this client is replaced with the
          regular callbacks from the newer framework.
        - The exported OMAP mailbox API are limited to omap_mbox_save_ctx,
          omap_mbox_restore_ctx, omap_mbox_enable_irq & omap_mbox_disable_irq,
          with the signature modified to take in the new mbox_chan handle instead
          of the OMAP specific omap_mbox handle. The first 2 will be removed when
          the OMAP mailbox driver is adapted to runtime_pm. The other exported
          API omap_mbox_request_channel will be removed once existing legacy
          users are converted to DT.
      Signed-off-by: default avatarSuman Anna <s-anna@ti.com>
      Cc: Ohad Ben-Cohen <ohad@wizery.com>
      Signed-off-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
      8841a66a
  4. 11 Jun, 2013 1 commit
    • Suman Anna's avatar
      mailbox/omap: move the OMAP mailbox framework to drivers · c869c75c
      Suman Anna authored
      The mailbox hardware (in OMAP) uses a queued mailbox interrupt
      mechanism that provides a communication channel between processors
      through a set of registers and their associated interrupt signals
      by sending and receiving messages.
      
      The OMAP mailbox framework/driver code is moved to be under
      drivers/mailbox, in preparation for adapting to a common mailbox
      driver framework. This allows the build for OMAP mailbox to be
      enabled (it was disabled during the multi-platform support).
      
      As part of the migration from plat and mach code:
      - Kconfig symbols have been renamed to build OMAP1 or OMAP2+ drivers.
      - mailbox.h under plat-omap/plat/include has been split into a public
        and private header files. The public header has only the API related
        functions and types.
      - The module name mailbox.ko from plat-omap is changed to
        omap-mailbox.ko
      - The module name mailbox_mach.ko from mach-omapX is changed as
          mailbox_omap1.ko for OMAP1
          mailbox_omap2.ko for OMAP2+
      
      Cc: Tony Lindgren <tony@atomide.com>
      [gregkh@linuxfoundation.org: ack for staging part]
      Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      Signed-off-by: default avatarOmar Ramirez Luna <omar.ramirez@copitl.com>
      Signed-off-by: default avatarSuman Anna <s-anna@ti.com>
      c869c75c