PCI: designware: Add support for v3.65 hardware

The Keystone PCI controller is based on v3.65 DesignWare hardware.  This
version differs from newer versions of the hardware in functional areas
discussed below that make it necessary to change dw_pcie_host_init() to
support v3.65 based PCI controller.

    1. No support for ATU port.  Any ATU-specific resource handling code is
       to be bypassed for v3.65 h/w.

    2. MSI controller uses application space to implement MSI and 32 MSI
       interrupts are multiplexed over 8 IRQs to the host.  Hence the code
       to process MSI IRQ needs to be different.  This patch allows
       platform driver to provide its own irq_domain_ops ptr to
       irq_domain_add_linear() through an API callback from the DesignWare
       core driver.

    3. MSI interrupt generation requires EP to write to the RC's
       application register.  So enhance the driver to allow setup of
       inbound access to MSI IRQ register as a post scan bus API callback.

Signed-off-by: Murali Karicheri <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Pratyush Anand <[email protected]>
Acked-by: Mohit KUMAR <[email protected]>
Acked-by: Jingoo Han <[email protected]>
CC: Santosh Shilimkar <[email protected]>
CC: Russell King <[email protected]>
CC: Grant Likely <[email protected]>
CC: Rob Herring <[email protected]>
CC: Jingoo Han <[email protected]>
CC: Richard Zhu <[email protected]>
CC: Kishon Vijay Abraham I <[email protected]>
CC: Marek Vasut <[email protected]>
CC: Arnd Bergmann <[email protected]>
CC: Pawel Moll <[email protected]>
CC: Mark Rutland <[email protected]>
CC: Ian Campbell <[email protected]>
CC: Kumar Gala <[email protected]>
CC: Randy Dunlap <[email protected]>
CC: Grant Likely <[email protected]>

0 files changed, 0 insertions, 0 deletions